1c6fd2807SJeff Garzik /* 2c6fd2807SJeff Garzik * libata-core.c - helper library for ATA 3c6fd2807SJeff Garzik * 4c6fd2807SJeff Garzik * Maintained by: Jeff Garzik <jgarzik@pobox.com> 5c6fd2807SJeff Garzik * Please ALWAYS copy linux-ide@vger.kernel.org 6c6fd2807SJeff Garzik * on emails. 7c6fd2807SJeff Garzik * 8c6fd2807SJeff Garzik * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9c6fd2807SJeff Garzik * Copyright 2003-2004 Jeff Garzik 10c6fd2807SJeff Garzik * 11c6fd2807SJeff Garzik * 12c6fd2807SJeff Garzik * This program is free software; you can redistribute it and/or modify 13c6fd2807SJeff Garzik * it under the terms of the GNU General Public License as published by 14c6fd2807SJeff Garzik * the Free Software Foundation; either version 2, or (at your option) 15c6fd2807SJeff Garzik * any later version. 16c6fd2807SJeff Garzik * 17c6fd2807SJeff Garzik * This program is distributed in the hope that it will be useful, 18c6fd2807SJeff Garzik * but WITHOUT ANY WARRANTY; without even the implied warranty of 19c6fd2807SJeff Garzik * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20c6fd2807SJeff Garzik * GNU General Public License for more details. 21c6fd2807SJeff Garzik * 22c6fd2807SJeff Garzik * You should have received a copy of the GNU General Public License 23c6fd2807SJeff Garzik * along with this program; see the file COPYING. If not, write to 24c6fd2807SJeff Garzik * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25c6fd2807SJeff Garzik * 26c6fd2807SJeff Garzik * 27c6fd2807SJeff Garzik * libata documentation is available via 'make {ps|pdf}docs', 28c6fd2807SJeff Garzik * as Documentation/DocBook/libata.* 29c6fd2807SJeff Garzik * 30c6fd2807SJeff Garzik * Hardware documentation available from http://www.t13.org/ and 31c6fd2807SJeff Garzik * http://www.sata-io.org/ 32c6fd2807SJeff Garzik * 33c6fd2807SJeff Garzik */ 34c6fd2807SJeff Garzik 35c6fd2807SJeff Garzik #include <linux/kernel.h> 36c6fd2807SJeff Garzik #include <linux/module.h> 37c6fd2807SJeff Garzik #include <linux/pci.h> 38c6fd2807SJeff Garzik #include <linux/init.h> 39c6fd2807SJeff Garzik #include <linux/list.h> 40c6fd2807SJeff Garzik #include <linux/mm.h> 41c6fd2807SJeff Garzik #include <linux/highmem.h> 42c6fd2807SJeff Garzik #include <linux/spinlock.h> 43c6fd2807SJeff Garzik #include <linux/blkdev.h> 44c6fd2807SJeff Garzik #include <linux/delay.h> 45c6fd2807SJeff Garzik #include <linux/timer.h> 46c6fd2807SJeff Garzik #include <linux/interrupt.h> 47c6fd2807SJeff Garzik #include <linux/completion.h> 48c6fd2807SJeff Garzik #include <linux/suspend.h> 49c6fd2807SJeff Garzik #include <linux/workqueue.h> 50c6fd2807SJeff Garzik #include <linux/jiffies.h> 51c6fd2807SJeff Garzik #include <linux/scatterlist.h> 52c6fd2807SJeff Garzik #include <scsi/scsi.h> 53c6fd2807SJeff Garzik #include <scsi/scsi_cmnd.h> 54c6fd2807SJeff Garzik #include <scsi/scsi_host.h> 55c6fd2807SJeff Garzik #include <linux/libata.h> 56c6fd2807SJeff Garzik #include <asm/io.h> 57c6fd2807SJeff Garzik #include <asm/semaphore.h> 58c6fd2807SJeff Garzik #include <asm/byteorder.h> 59c6fd2807SJeff Garzik 60c6fd2807SJeff Garzik #include "libata.h" 61c6fd2807SJeff Garzik 62cb48cab7SJeff Garzik #define DRV_VERSION "2.20" /* must be exactly four chars */ 63fda0efc5SJeff Garzik 64fda0efc5SJeff Garzik 65c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 66c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 67c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 68c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 69c6fd2807SJeff Garzik 70c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 71c6fd2807SJeff Garzik u16 heads, u16 sectors); 72c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 73c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev); 74c6fd2807SJeff Garzik 7544877b4eSTejun Heo static unsigned int ata_print_id = 1; 76c6fd2807SJeff Garzik static struct workqueue_struct *ata_wq; 77c6fd2807SJeff Garzik 78c6fd2807SJeff Garzik struct workqueue_struct *ata_aux_wq; 79c6fd2807SJeff Garzik 80c6fd2807SJeff Garzik int atapi_enabled = 1; 81c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 82c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); 83c6fd2807SJeff Garzik 84c6fd2807SJeff Garzik int atapi_dmadir = 0; 85c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 86c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); 87c6fd2807SJeff Garzik 88c6fd2807SJeff Garzik int libata_fua = 0; 89c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 90c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 91c6fd2807SJeff Garzik 92c6fd2807SJeff Garzik static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; 93c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 94c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 95c6fd2807SJeff Garzik 9611ef697bSKristen Carlson Accardi int noacpi; 9711ef697bSKristen Carlson Accardi module_param(noacpi, int, 0444); 9811ef697bSKristen Carlson Accardi MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); 9911ef697bSKristen Carlson Accardi 100c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 101c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 102c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 103c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 104c6fd2807SJeff Garzik 105c6fd2807SJeff Garzik 106c6fd2807SJeff Garzik /** 107c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 108c6fd2807SJeff Garzik * @tf: Taskfile to convert 109c6fd2807SJeff Garzik * @fis: Buffer into which data will output 110c6fd2807SJeff Garzik * @pmp: Port multiplier port 111c6fd2807SJeff Garzik * 112c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 113c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 114c6fd2807SJeff Garzik * 115c6fd2807SJeff Garzik * LOCKING: 116c6fd2807SJeff Garzik * Inherited from caller. 117c6fd2807SJeff Garzik */ 118c6fd2807SJeff Garzik 119c6fd2807SJeff Garzik void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) 120c6fd2807SJeff Garzik { 121c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 122c6fd2807SJeff Garzik fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, 123c6fd2807SJeff Garzik bit 7 indicates Command FIS */ 124c6fd2807SJeff Garzik fis[2] = tf->command; 125c6fd2807SJeff Garzik fis[3] = tf->feature; 126c6fd2807SJeff Garzik 127c6fd2807SJeff Garzik fis[4] = tf->lbal; 128c6fd2807SJeff Garzik fis[5] = tf->lbam; 129c6fd2807SJeff Garzik fis[6] = tf->lbah; 130c6fd2807SJeff Garzik fis[7] = tf->device; 131c6fd2807SJeff Garzik 132c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 133c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 134c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 135c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 136c6fd2807SJeff Garzik 137c6fd2807SJeff Garzik fis[12] = tf->nsect; 138c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 139c6fd2807SJeff Garzik fis[14] = 0; 140c6fd2807SJeff Garzik fis[15] = tf->ctl; 141c6fd2807SJeff Garzik 142c6fd2807SJeff Garzik fis[16] = 0; 143c6fd2807SJeff Garzik fis[17] = 0; 144c6fd2807SJeff Garzik fis[18] = 0; 145c6fd2807SJeff Garzik fis[19] = 0; 146c6fd2807SJeff Garzik } 147c6fd2807SJeff Garzik 148c6fd2807SJeff Garzik /** 149c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 150c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 151c6fd2807SJeff Garzik * @tf: Taskfile to output 152c6fd2807SJeff Garzik * 153c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 154c6fd2807SJeff Garzik * 155c6fd2807SJeff Garzik * LOCKING: 156c6fd2807SJeff Garzik * Inherited from caller. 157c6fd2807SJeff Garzik */ 158c6fd2807SJeff Garzik 159c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 160c6fd2807SJeff Garzik { 161c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 162c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 163c6fd2807SJeff Garzik 164c6fd2807SJeff Garzik tf->lbal = fis[4]; 165c6fd2807SJeff Garzik tf->lbam = fis[5]; 166c6fd2807SJeff Garzik tf->lbah = fis[6]; 167c6fd2807SJeff Garzik tf->device = fis[7]; 168c6fd2807SJeff Garzik 169c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 170c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 171c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 172c6fd2807SJeff Garzik 173c6fd2807SJeff Garzik tf->nsect = fis[12]; 174c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 175c6fd2807SJeff Garzik } 176c6fd2807SJeff Garzik 177c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 178c6fd2807SJeff Garzik /* pio multi */ 179c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 180c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 181c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 182c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 183c6fd2807SJeff Garzik 0, 184c6fd2807SJeff Garzik 0, 185c6fd2807SJeff Garzik 0, 186c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 187c6fd2807SJeff Garzik /* pio */ 188c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 189c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 190c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 191c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 192c6fd2807SJeff Garzik 0, 193c6fd2807SJeff Garzik 0, 194c6fd2807SJeff Garzik 0, 195c6fd2807SJeff Garzik 0, 196c6fd2807SJeff Garzik /* dma */ 197c6fd2807SJeff Garzik ATA_CMD_READ, 198c6fd2807SJeff Garzik ATA_CMD_WRITE, 199c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 200c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 201c6fd2807SJeff Garzik 0, 202c6fd2807SJeff Garzik 0, 203c6fd2807SJeff Garzik 0, 204c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 205c6fd2807SJeff Garzik }; 206c6fd2807SJeff Garzik 207c6fd2807SJeff Garzik /** 208c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 209bd056d7eSTejun Heo * @tf: command to examine and configure 210bd056d7eSTejun Heo * @dev: device tf belongs to 211c6fd2807SJeff Garzik * 212c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 213c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 214c6fd2807SJeff Garzik * 215c6fd2807SJeff Garzik * LOCKING: 216c6fd2807SJeff Garzik * caller. 217c6fd2807SJeff Garzik */ 218bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 219c6fd2807SJeff Garzik { 220c6fd2807SJeff Garzik u8 cmd; 221c6fd2807SJeff Garzik 222c6fd2807SJeff Garzik int index, fua, lba48, write; 223c6fd2807SJeff Garzik 224c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 225c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 226c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 227c6fd2807SJeff Garzik 228c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 229c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 230c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 231bd056d7eSTejun Heo } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { 232c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 233c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 234c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 235c6fd2807SJeff Garzik } else { 236c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 237c6fd2807SJeff Garzik index = 16; 238c6fd2807SJeff Garzik } 239c6fd2807SJeff Garzik 240c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 241c6fd2807SJeff Garzik if (cmd) { 242c6fd2807SJeff Garzik tf->command = cmd; 243c6fd2807SJeff Garzik return 0; 244c6fd2807SJeff Garzik } 245c6fd2807SJeff Garzik return -1; 246c6fd2807SJeff Garzik } 247c6fd2807SJeff Garzik 248c6fd2807SJeff Garzik /** 24935b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 25035b649feSTejun Heo * @tf: ATA taskfile of interest 25135b649feSTejun Heo * @dev: ATA device @tf belongs to 25235b649feSTejun Heo * 25335b649feSTejun Heo * LOCKING: 25435b649feSTejun Heo * None. 25535b649feSTejun Heo * 25635b649feSTejun Heo * Read block address from @tf. This function can handle all 25735b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 25835b649feSTejun Heo * flags select the address format to use. 25935b649feSTejun Heo * 26035b649feSTejun Heo * RETURNS: 26135b649feSTejun Heo * Block address read from @tf. 26235b649feSTejun Heo */ 26335b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 26435b649feSTejun Heo { 26535b649feSTejun Heo u64 block = 0; 26635b649feSTejun Heo 26735b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 26835b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 26935b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 27035b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 27135b649feSTejun Heo block |= tf->hob_lbal << 24; 27235b649feSTejun Heo } else 27335b649feSTejun Heo block |= (tf->device & 0xf) << 24; 27435b649feSTejun Heo 27535b649feSTejun Heo block |= tf->lbah << 16; 27635b649feSTejun Heo block |= tf->lbam << 8; 27735b649feSTejun Heo block |= tf->lbal; 27835b649feSTejun Heo } else { 27935b649feSTejun Heo u32 cyl, head, sect; 28035b649feSTejun Heo 28135b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 28235b649feSTejun Heo head = tf->device & 0xf; 28335b649feSTejun Heo sect = tf->lbal; 28435b649feSTejun Heo 28535b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 28635b649feSTejun Heo } 28735b649feSTejun Heo 28835b649feSTejun Heo return block; 28935b649feSTejun Heo } 29035b649feSTejun Heo 29135b649feSTejun Heo /** 292bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 293bd056d7eSTejun Heo * @tf: Target ATA taskfile 294bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 295bd056d7eSTejun Heo * @block: Block address 296bd056d7eSTejun Heo * @n_block: Number of blocks 297bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 298bd056d7eSTejun Heo * @tag: tag 299bd056d7eSTejun Heo * 300bd056d7eSTejun Heo * LOCKING: 301bd056d7eSTejun Heo * None. 302bd056d7eSTejun Heo * 303bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 304bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 305bd056d7eSTejun Heo * 306bd056d7eSTejun Heo * RETURNS: 307bd056d7eSTejun Heo * 308bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 309bd056d7eSTejun Heo * -EINVAL if the request is invalid. 310bd056d7eSTejun Heo */ 311bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 312bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 313bd056d7eSTejun Heo unsigned int tag) 314bd056d7eSTejun Heo { 315bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 316bd056d7eSTejun Heo tf->flags |= tf_flags; 317bd056d7eSTejun Heo 3186d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 319bd056d7eSTejun Heo /* yay, NCQ */ 320bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 321bd056d7eSTejun Heo return -ERANGE; 322bd056d7eSTejun Heo 323bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 324bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 325bd056d7eSTejun Heo 326bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 327bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 328bd056d7eSTejun Heo else 329bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 330bd056d7eSTejun Heo 331bd056d7eSTejun Heo tf->nsect = tag << 3; 332bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 333bd056d7eSTejun Heo tf->feature = n_block & 0xff; 334bd056d7eSTejun Heo 335bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 336bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 337bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 338bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 339bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 340bd056d7eSTejun Heo tf->lbal = block & 0xff; 341bd056d7eSTejun Heo 342bd056d7eSTejun Heo tf->device = 1 << 6; 343bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 344bd056d7eSTejun Heo tf->device |= 1 << 7; 345bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 346bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 347bd056d7eSTejun Heo 348bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 349bd056d7eSTejun Heo /* use LBA28 */ 350bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 351bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 352bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 353bd056d7eSTejun Heo return -ERANGE; 354bd056d7eSTejun Heo 355bd056d7eSTejun Heo /* use LBA48 */ 356bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 357bd056d7eSTejun Heo 358bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 359bd056d7eSTejun Heo 360bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 361bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 362bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 363bd056d7eSTejun Heo } else 364bd056d7eSTejun Heo /* request too large even for LBA48 */ 365bd056d7eSTejun Heo return -ERANGE; 366bd056d7eSTejun Heo 367bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 368bd056d7eSTejun Heo return -EINVAL; 369bd056d7eSTejun Heo 370bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 371bd056d7eSTejun Heo 372bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 373bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 374bd056d7eSTejun Heo tf->lbal = block & 0xff; 375bd056d7eSTejun Heo 376bd056d7eSTejun Heo tf->device |= ATA_LBA; 377bd056d7eSTejun Heo } else { 378bd056d7eSTejun Heo /* CHS */ 379bd056d7eSTejun Heo u32 sect, head, cyl, track; 380bd056d7eSTejun Heo 381bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 382bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 383bd056d7eSTejun Heo return -ERANGE; 384bd056d7eSTejun Heo 385bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 386bd056d7eSTejun Heo return -EINVAL; 387bd056d7eSTejun Heo 388bd056d7eSTejun Heo /* Convert LBA to CHS */ 389bd056d7eSTejun Heo track = (u32)block / dev->sectors; 390bd056d7eSTejun Heo cyl = track / dev->heads; 391bd056d7eSTejun Heo head = track % dev->heads; 392bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 393bd056d7eSTejun Heo 394bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 395bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 396bd056d7eSTejun Heo 397bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 398bd056d7eSTejun Heo Cylinder: 0-65535 399bd056d7eSTejun Heo Head: 0-15 400bd056d7eSTejun Heo Sector: 1-255*/ 401bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 402bd056d7eSTejun Heo return -ERANGE; 403bd056d7eSTejun Heo 404bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 405bd056d7eSTejun Heo tf->lbal = sect; 406bd056d7eSTejun Heo tf->lbam = cyl; 407bd056d7eSTejun Heo tf->lbah = cyl >> 8; 408bd056d7eSTejun Heo tf->device |= head; 409bd056d7eSTejun Heo } 410bd056d7eSTejun Heo 411bd056d7eSTejun Heo return 0; 412bd056d7eSTejun Heo } 413bd056d7eSTejun Heo 414bd056d7eSTejun Heo /** 415c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 416c6fd2807SJeff Garzik * @pio_mask: pio_mask 417c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 418c6fd2807SJeff Garzik * @udma_mask: udma_mask 419c6fd2807SJeff Garzik * 420c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 421c6fd2807SJeff Garzik * unsigned int xfer_mask. 422c6fd2807SJeff Garzik * 423c6fd2807SJeff Garzik * LOCKING: 424c6fd2807SJeff Garzik * None. 425c6fd2807SJeff Garzik * 426c6fd2807SJeff Garzik * RETURNS: 427c6fd2807SJeff Garzik * Packed xfer_mask. 428c6fd2807SJeff Garzik */ 429c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 430c6fd2807SJeff Garzik unsigned int mwdma_mask, 431c6fd2807SJeff Garzik unsigned int udma_mask) 432c6fd2807SJeff Garzik { 433c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 434c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 435c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 436c6fd2807SJeff Garzik } 437c6fd2807SJeff Garzik 438c6fd2807SJeff Garzik /** 439c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 440c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 441c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 442c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 443c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 444c6fd2807SJeff Garzik * 445c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 446c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 447c6fd2807SJeff Garzik */ 448c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 449c6fd2807SJeff Garzik unsigned int *pio_mask, 450c6fd2807SJeff Garzik unsigned int *mwdma_mask, 451c6fd2807SJeff Garzik unsigned int *udma_mask) 452c6fd2807SJeff Garzik { 453c6fd2807SJeff Garzik if (pio_mask) 454c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 455c6fd2807SJeff Garzik if (mwdma_mask) 456c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 457c6fd2807SJeff Garzik if (udma_mask) 458c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 459c6fd2807SJeff Garzik } 460c6fd2807SJeff Garzik 461c6fd2807SJeff Garzik static const struct ata_xfer_ent { 462c6fd2807SJeff Garzik int shift, bits; 463c6fd2807SJeff Garzik u8 base; 464c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 465c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 466c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 467c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 468c6fd2807SJeff Garzik { -1, }, 469c6fd2807SJeff Garzik }; 470c6fd2807SJeff Garzik 471c6fd2807SJeff Garzik /** 472c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 473c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 474c6fd2807SJeff Garzik * 475c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 476c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 477c6fd2807SJeff Garzik * 478c6fd2807SJeff Garzik * LOCKING: 479c6fd2807SJeff Garzik * None. 480c6fd2807SJeff Garzik * 481c6fd2807SJeff Garzik * RETURNS: 482c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 483c6fd2807SJeff Garzik */ 484c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 485c6fd2807SJeff Garzik { 486c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 487c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 488c6fd2807SJeff Garzik 489c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 490c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 491c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 492c6fd2807SJeff Garzik return 0; 493c6fd2807SJeff Garzik } 494c6fd2807SJeff Garzik 495c6fd2807SJeff Garzik /** 496c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 497c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 498c6fd2807SJeff Garzik * 499c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 500c6fd2807SJeff Garzik * 501c6fd2807SJeff Garzik * LOCKING: 502c6fd2807SJeff Garzik * None. 503c6fd2807SJeff Garzik * 504c6fd2807SJeff Garzik * RETURNS: 505c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 506c6fd2807SJeff Garzik */ 507c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 508c6fd2807SJeff Garzik { 509c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 510c6fd2807SJeff Garzik 511c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 512c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 513c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 514c6fd2807SJeff Garzik return 0; 515c6fd2807SJeff Garzik } 516c6fd2807SJeff Garzik 517c6fd2807SJeff Garzik /** 518c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 519c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 520c6fd2807SJeff Garzik * 521c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 522c6fd2807SJeff Garzik * 523c6fd2807SJeff Garzik * LOCKING: 524c6fd2807SJeff Garzik * None. 525c6fd2807SJeff Garzik * 526c6fd2807SJeff Garzik * RETURNS: 527c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 528c6fd2807SJeff Garzik */ 529c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 530c6fd2807SJeff Garzik { 531c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 532c6fd2807SJeff Garzik 533c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 534c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 535c6fd2807SJeff Garzik return ent->shift; 536c6fd2807SJeff Garzik return -1; 537c6fd2807SJeff Garzik } 538c6fd2807SJeff Garzik 539c6fd2807SJeff Garzik /** 540c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 541c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 542c6fd2807SJeff Garzik * 543c6fd2807SJeff Garzik * Determine string which represents the highest speed 544c6fd2807SJeff Garzik * (highest bit in @modemask). 545c6fd2807SJeff Garzik * 546c6fd2807SJeff Garzik * LOCKING: 547c6fd2807SJeff Garzik * None. 548c6fd2807SJeff Garzik * 549c6fd2807SJeff Garzik * RETURNS: 550c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 551c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 552c6fd2807SJeff Garzik */ 553c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 554c6fd2807SJeff Garzik { 555c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 556c6fd2807SJeff Garzik "PIO0", 557c6fd2807SJeff Garzik "PIO1", 558c6fd2807SJeff Garzik "PIO2", 559c6fd2807SJeff Garzik "PIO3", 560c6fd2807SJeff Garzik "PIO4", 561b352e57dSAlan Cox "PIO5", 562b352e57dSAlan Cox "PIO6", 563c6fd2807SJeff Garzik "MWDMA0", 564c6fd2807SJeff Garzik "MWDMA1", 565c6fd2807SJeff Garzik "MWDMA2", 566b352e57dSAlan Cox "MWDMA3", 567b352e57dSAlan Cox "MWDMA4", 568c6fd2807SJeff Garzik "UDMA/16", 569c6fd2807SJeff Garzik "UDMA/25", 570c6fd2807SJeff Garzik "UDMA/33", 571c6fd2807SJeff Garzik "UDMA/44", 572c6fd2807SJeff Garzik "UDMA/66", 573c6fd2807SJeff Garzik "UDMA/100", 574c6fd2807SJeff Garzik "UDMA/133", 575c6fd2807SJeff Garzik "UDMA7", 576c6fd2807SJeff Garzik }; 577c6fd2807SJeff Garzik int highbit; 578c6fd2807SJeff Garzik 579c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 580c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 581c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 582c6fd2807SJeff Garzik return "<n/a>"; 583c6fd2807SJeff Garzik } 584c6fd2807SJeff Garzik 585c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 586c6fd2807SJeff Garzik { 587c6fd2807SJeff Garzik static const char * const spd_str[] = { 588c6fd2807SJeff Garzik "1.5 Gbps", 589c6fd2807SJeff Garzik "3.0 Gbps", 590c6fd2807SJeff Garzik }; 591c6fd2807SJeff Garzik 592c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 593c6fd2807SJeff Garzik return "<unknown>"; 594c6fd2807SJeff Garzik return spd_str[spd - 1]; 595c6fd2807SJeff Garzik } 596c6fd2807SJeff Garzik 597c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 598c6fd2807SJeff Garzik { 599c6fd2807SJeff Garzik if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) { 600c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 6014ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 6024ae72a1eSTejun Heo ATA_DNXFER_QUIET); 603c6fd2807SJeff Garzik dev->class++; 604c6fd2807SJeff Garzik } 605c6fd2807SJeff Garzik } 606c6fd2807SJeff Garzik 607c6fd2807SJeff Garzik /** 608c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 609c6fd2807SJeff Garzik * @ap: ATA channel to examine 610c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 611c6fd2807SJeff Garzik * 6120d5ff566STejun Heo * This technique was originally described in 6130d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 6140d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 6150d5ff566STejun Heo * 6160d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 6170d5ff566STejun Heo * and if a device is present, it will respond by 6180d5ff566STejun Heo * correctly storing and echoing back the 6190d5ff566STejun Heo * ATA shadow register contents. 620c6fd2807SJeff Garzik * 621c6fd2807SJeff Garzik * LOCKING: 622c6fd2807SJeff Garzik * caller. 623c6fd2807SJeff Garzik */ 624c6fd2807SJeff Garzik 6250d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 626c6fd2807SJeff Garzik { 6270d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 6280d5ff566STejun Heo u8 nsect, lbal; 6290d5ff566STejun Heo 6300d5ff566STejun Heo ap->ops->dev_select(ap, device); 6310d5ff566STejun Heo 6320d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6330d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6340d5ff566STejun Heo 6350d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 6360d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 6370d5ff566STejun Heo 6380d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6390d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6400d5ff566STejun Heo 6410d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 6420d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 6430d5ff566STejun Heo 6440d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 6450d5ff566STejun Heo return 1; /* we found a device */ 6460d5ff566STejun Heo 6470d5ff566STejun Heo return 0; /* nothing found */ 648c6fd2807SJeff Garzik } 649c6fd2807SJeff Garzik 650c6fd2807SJeff Garzik /** 651c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 652c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 653c6fd2807SJeff Garzik * 654c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 655c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 656c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 657c6fd2807SJeff Garzik * 658c6fd2807SJeff Garzik * LOCKING: 659c6fd2807SJeff Garzik * None. 660c6fd2807SJeff Garzik * 661c6fd2807SJeff Garzik * RETURNS: 662c6fd2807SJeff Garzik * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN 663c6fd2807SJeff Garzik * the event of failure. 664c6fd2807SJeff Garzik */ 665c6fd2807SJeff Garzik 666c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 667c6fd2807SJeff Garzik { 668c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 669c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 670c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 671c6fd2807SJeff Garzik */ 672c6fd2807SJeff Garzik 673c6fd2807SJeff Garzik if (((tf->lbam == 0) && (tf->lbah == 0)) || 674c6fd2807SJeff Garzik ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { 675c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 676c6fd2807SJeff Garzik return ATA_DEV_ATA; 677c6fd2807SJeff Garzik } 678c6fd2807SJeff Garzik 679c6fd2807SJeff Garzik if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || 680c6fd2807SJeff Garzik ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { 681c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 682c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 683c6fd2807SJeff Garzik } 684c6fd2807SJeff Garzik 685c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 686c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 687c6fd2807SJeff Garzik } 688c6fd2807SJeff Garzik 689c6fd2807SJeff Garzik /** 690c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 691c6fd2807SJeff Garzik * @ap: ATA channel to examine 692c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 693c6fd2807SJeff Garzik * @r_err: Value of error register on completion 694c6fd2807SJeff Garzik * 695c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 696c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 697c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 698c6fd2807SJeff Garzik * and diagnostics. 699c6fd2807SJeff Garzik * 700c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 701c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 702c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 703c6fd2807SJeff Garzik * 704c6fd2807SJeff Garzik * LOCKING: 705c6fd2807SJeff Garzik * caller. 706c6fd2807SJeff Garzik * 707c6fd2807SJeff Garzik * RETURNS: 708c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 709c6fd2807SJeff Garzik */ 710c6fd2807SJeff Garzik 711a619f981SAkira Iguchi unsigned int 712c6fd2807SJeff Garzik ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) 713c6fd2807SJeff Garzik { 714c6fd2807SJeff Garzik struct ata_taskfile tf; 715c6fd2807SJeff Garzik unsigned int class; 716c6fd2807SJeff Garzik u8 err; 717c6fd2807SJeff Garzik 718c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 719c6fd2807SJeff Garzik 720c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 721c6fd2807SJeff Garzik 722c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 723c6fd2807SJeff Garzik err = tf.feature; 724c6fd2807SJeff Garzik if (r_err) 725c6fd2807SJeff Garzik *r_err = err; 726c6fd2807SJeff Garzik 72793590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 72893590859SAlan Cox if (err == 0 && device == 0) 72993590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 73093590859SAlan Cox ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; 73193590859SAlan Cox else if (err == 1) 732c6fd2807SJeff Garzik /* do nothing */ ; 733c6fd2807SJeff Garzik else if ((device == 0) && (err == 0x81)) 734c6fd2807SJeff Garzik /* do nothing */ ; 735c6fd2807SJeff Garzik else 736c6fd2807SJeff Garzik return ATA_DEV_NONE; 737c6fd2807SJeff Garzik 738c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 739c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 740c6fd2807SJeff Garzik 741c6fd2807SJeff Garzik if (class == ATA_DEV_UNKNOWN) 742c6fd2807SJeff Garzik return ATA_DEV_NONE; 743c6fd2807SJeff Garzik if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 744c6fd2807SJeff Garzik return ATA_DEV_NONE; 745c6fd2807SJeff Garzik return class; 746c6fd2807SJeff Garzik } 747c6fd2807SJeff Garzik 748c6fd2807SJeff Garzik /** 749c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 750c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 751c6fd2807SJeff Garzik * @s: string into which data is output 752c6fd2807SJeff Garzik * @ofs: offset into identify device page 753c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 754c6fd2807SJeff Garzik * 755c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 756c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 757c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 758c6fd2807SJeff Garzik * 759c6fd2807SJeff Garzik * LOCKING: 760c6fd2807SJeff Garzik * caller. 761c6fd2807SJeff Garzik */ 762c6fd2807SJeff Garzik 763c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 764c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 765c6fd2807SJeff Garzik { 766c6fd2807SJeff Garzik unsigned int c; 767c6fd2807SJeff Garzik 768c6fd2807SJeff Garzik while (len > 0) { 769c6fd2807SJeff Garzik c = id[ofs] >> 8; 770c6fd2807SJeff Garzik *s = c; 771c6fd2807SJeff Garzik s++; 772c6fd2807SJeff Garzik 773c6fd2807SJeff Garzik c = id[ofs] & 0xff; 774c6fd2807SJeff Garzik *s = c; 775c6fd2807SJeff Garzik s++; 776c6fd2807SJeff Garzik 777c6fd2807SJeff Garzik ofs++; 778c6fd2807SJeff Garzik len -= 2; 779c6fd2807SJeff Garzik } 780c6fd2807SJeff Garzik } 781c6fd2807SJeff Garzik 782c6fd2807SJeff Garzik /** 783c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 784c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 785c6fd2807SJeff Garzik * @s: string into which data is output 786c6fd2807SJeff Garzik * @ofs: offset into identify device page 787c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 788c6fd2807SJeff Garzik * 789c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 790c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 791c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 792c6fd2807SJeff Garzik * 793c6fd2807SJeff Garzik * LOCKING: 794c6fd2807SJeff Garzik * caller. 795c6fd2807SJeff Garzik */ 796c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 797c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 798c6fd2807SJeff Garzik { 799c6fd2807SJeff Garzik unsigned char *p; 800c6fd2807SJeff Garzik 801c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 802c6fd2807SJeff Garzik 803c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 804c6fd2807SJeff Garzik 805c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 806c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 807c6fd2807SJeff Garzik p--; 808c6fd2807SJeff Garzik *p = '\0'; 809c6fd2807SJeff Garzik } 810c6fd2807SJeff Garzik 811c6fd2807SJeff Garzik static u64 ata_id_n_sectors(const u16 *id) 812c6fd2807SJeff Garzik { 813c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 814c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) 815c6fd2807SJeff Garzik return ata_id_u64(id, 100); 816c6fd2807SJeff Garzik else 817c6fd2807SJeff Garzik return ata_id_u32(id, 60); 818c6fd2807SJeff Garzik } else { 819c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) 820c6fd2807SJeff Garzik return ata_id_u32(id, 57); 821c6fd2807SJeff Garzik else 822c6fd2807SJeff Garzik return id[1] * id[3] * id[6]; 823c6fd2807SJeff Garzik } 824c6fd2807SJeff Garzik } 825c6fd2807SJeff Garzik 826c6fd2807SJeff Garzik /** 82710305f0fSAlan * ata_id_to_dma_mode - Identify DMA mode from id block 82810305f0fSAlan * @dev: device to identify 82910305f0fSAlan * @mode: mode to assume if we cannot tell 83010305f0fSAlan * 83110305f0fSAlan * Set up the timing values for the device based upon the identify 83210305f0fSAlan * reported values for the DMA mode. This function is used by drivers 83310305f0fSAlan * which rely upon firmware configured modes, but wish to report the 83410305f0fSAlan * mode correctly when possible. 83510305f0fSAlan * 83610305f0fSAlan * In addition we emit similarly formatted messages to the default 83710305f0fSAlan * ata_dev_set_mode handler, in order to provide consistency of 83810305f0fSAlan * presentation. 83910305f0fSAlan */ 84010305f0fSAlan 84110305f0fSAlan void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) 84210305f0fSAlan { 84310305f0fSAlan unsigned int mask; 84410305f0fSAlan u8 mode; 84510305f0fSAlan 84610305f0fSAlan /* Pack the DMA modes */ 84710305f0fSAlan mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; 84810305f0fSAlan if (dev->id[53] & 0x04) 84910305f0fSAlan mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; 85010305f0fSAlan 85110305f0fSAlan /* Select the mode in use */ 85210305f0fSAlan mode = ata_xfer_mask2mode(mask); 85310305f0fSAlan 85410305f0fSAlan if (mode != 0) { 85510305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 85610305f0fSAlan ata_mode_string(mask)); 85710305f0fSAlan } else { 85810305f0fSAlan /* SWDMA perhaps ? */ 85910305f0fSAlan mode = unknown; 86010305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); 86110305f0fSAlan } 86210305f0fSAlan 86310305f0fSAlan /* Configure the device reporting */ 86410305f0fSAlan dev->xfer_mode = mode; 86510305f0fSAlan dev->xfer_shift = ata_xfer_mode2shift(mode); 86610305f0fSAlan } 86710305f0fSAlan 86810305f0fSAlan /** 869c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 870c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 871c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 872c6fd2807SJeff Garzik * 873c6fd2807SJeff Garzik * This function performs no actual function. 874c6fd2807SJeff Garzik * 875c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 876c6fd2807SJeff Garzik * 877c6fd2807SJeff Garzik * LOCKING: 878c6fd2807SJeff Garzik * caller. 879c6fd2807SJeff Garzik */ 880c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 881c6fd2807SJeff Garzik { 882c6fd2807SJeff Garzik } 883c6fd2807SJeff Garzik 884c6fd2807SJeff Garzik 885c6fd2807SJeff Garzik /** 886c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 887c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 888c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 889c6fd2807SJeff Garzik * 890c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 891c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 892c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 893c6fd2807SJeff Garzik * 894c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 895c6fd2807SJeff Garzik * 896c6fd2807SJeff Garzik * LOCKING: 897c6fd2807SJeff Garzik * caller. 898c6fd2807SJeff Garzik */ 899c6fd2807SJeff Garzik 900c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 901c6fd2807SJeff Garzik { 902c6fd2807SJeff Garzik u8 tmp; 903c6fd2807SJeff Garzik 904c6fd2807SJeff Garzik if (device == 0) 905c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 906c6fd2807SJeff Garzik else 907c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 908c6fd2807SJeff Garzik 9090d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 910c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 911c6fd2807SJeff Garzik } 912c6fd2807SJeff Garzik 913c6fd2807SJeff Garzik /** 914c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 915c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 916c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 917c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 918c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 919c6fd2807SJeff Garzik * 920c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 921c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 922c6fd2807SJeff Garzik * ATA channel. 923c6fd2807SJeff Garzik * 924c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 925c6fd2807SJeff Garzik * which additionally provides the services of inserting 926c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 927c6fd2807SJeff Garzik * 928c6fd2807SJeff Garzik * LOCKING: 929c6fd2807SJeff Garzik * caller. 930c6fd2807SJeff Garzik */ 931c6fd2807SJeff Garzik 932c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 933c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 934c6fd2807SJeff Garzik { 935c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 93644877b4eSTejun Heo ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " 93744877b4eSTejun Heo "device %u, wait %u\n", device, wait); 938c6fd2807SJeff Garzik 939c6fd2807SJeff Garzik if (wait) 940c6fd2807SJeff Garzik ata_wait_idle(ap); 941c6fd2807SJeff Garzik 942c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 943c6fd2807SJeff Garzik 944c6fd2807SJeff Garzik if (wait) { 945c6fd2807SJeff Garzik if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) 946c6fd2807SJeff Garzik msleep(150); 947c6fd2807SJeff Garzik ata_wait_idle(ap); 948c6fd2807SJeff Garzik } 949c6fd2807SJeff Garzik } 950c6fd2807SJeff Garzik 951c6fd2807SJeff Garzik /** 952c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 953c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 954c6fd2807SJeff Garzik * 955c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 956c6fd2807SJeff Garzik * page. 957c6fd2807SJeff Garzik * 958c6fd2807SJeff Garzik * LOCKING: 959c6fd2807SJeff Garzik * caller. 960c6fd2807SJeff Garzik */ 961c6fd2807SJeff Garzik 962c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 963c6fd2807SJeff Garzik { 964c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 965c6fd2807SJeff Garzik "53==0x%04x " 966c6fd2807SJeff Garzik "63==0x%04x " 967c6fd2807SJeff Garzik "64==0x%04x " 968c6fd2807SJeff Garzik "75==0x%04x \n", 969c6fd2807SJeff Garzik id[49], 970c6fd2807SJeff Garzik id[53], 971c6fd2807SJeff Garzik id[63], 972c6fd2807SJeff Garzik id[64], 973c6fd2807SJeff Garzik id[75]); 974c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 975c6fd2807SJeff Garzik "81==0x%04x " 976c6fd2807SJeff Garzik "82==0x%04x " 977c6fd2807SJeff Garzik "83==0x%04x " 978c6fd2807SJeff Garzik "84==0x%04x \n", 979c6fd2807SJeff Garzik id[80], 980c6fd2807SJeff Garzik id[81], 981c6fd2807SJeff Garzik id[82], 982c6fd2807SJeff Garzik id[83], 983c6fd2807SJeff Garzik id[84]); 984c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 985c6fd2807SJeff Garzik "93==0x%04x\n", 986c6fd2807SJeff Garzik id[88], 987c6fd2807SJeff Garzik id[93]); 988c6fd2807SJeff Garzik } 989c6fd2807SJeff Garzik 990c6fd2807SJeff Garzik /** 991c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 992c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 993c6fd2807SJeff Garzik * 994c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 995c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 996c6fd2807SJeff Garzik * 997c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 998c6fd2807SJeff Garzik * 999c6fd2807SJeff Garzik * LOCKING: 1000c6fd2807SJeff Garzik * None. 1001c6fd2807SJeff Garzik * 1002c6fd2807SJeff Garzik * RETURNS: 1003c6fd2807SJeff Garzik * Computed xfermask 1004c6fd2807SJeff Garzik */ 1005c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 1006c6fd2807SJeff Garzik { 1007c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 1008c6fd2807SJeff Garzik 1009c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1010c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1011c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1012c6fd2807SJeff Garzik pio_mask <<= 3; 1013c6fd2807SJeff Garzik pio_mask |= 0x7; 1014c6fd2807SJeff Garzik } else { 1015c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1016c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1017c6fd2807SJeff Garzik * a mask. 1018c6fd2807SJeff Garzik */ 10197a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 102046767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 102146767aebSAlan Cox pio_mask = (2 << mode) - 1; 102246767aebSAlan Cox else 102346767aebSAlan Cox pio_mask = 1; 1024c6fd2807SJeff Garzik 1025c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1026c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1027c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1028c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1029c6fd2807SJeff Garzik * will get this right anyway 1030c6fd2807SJeff Garzik */ 1031c6fd2807SJeff Garzik } 1032c6fd2807SJeff Garzik 1033c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1034c6fd2807SJeff Garzik 1035b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1036b352e57dSAlan Cox /* 1037b352e57dSAlan Cox * Process compact flash extended modes 1038b352e57dSAlan Cox */ 1039b352e57dSAlan Cox int pio = id[163] & 0x7; 1040b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1041b352e57dSAlan Cox 1042b352e57dSAlan Cox if (pio) 1043b352e57dSAlan Cox pio_mask |= (1 << 5); 1044b352e57dSAlan Cox if (pio > 1) 1045b352e57dSAlan Cox pio_mask |= (1 << 6); 1046b352e57dSAlan Cox if (dma) 1047b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1048b352e57dSAlan Cox if (dma > 1) 1049b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1050b352e57dSAlan Cox } 1051b352e57dSAlan Cox 1052c6fd2807SJeff Garzik udma_mask = 0; 1053c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1054c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1055c6fd2807SJeff Garzik 1056c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1057c6fd2807SJeff Garzik } 1058c6fd2807SJeff Garzik 1059c6fd2807SJeff Garzik /** 1060c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 1061c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1062c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 106365f27f38SDavid Howells * @data: data for @fn to use 1064c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1065c6fd2807SJeff Garzik * 1066c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1067c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1068c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1069c6fd2807SJeff Garzik * one task is active at any given time. 1070c6fd2807SJeff Garzik * 1071c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1072c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 1073c6fd2807SJeff Garzik * synchronization. 1074c6fd2807SJeff Garzik * 1075c6fd2807SJeff Garzik * LOCKING: 1076c6fd2807SJeff Garzik * Inherited from caller. 1077c6fd2807SJeff Garzik */ 107865f27f38SDavid Howells void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, 1079c6fd2807SJeff Garzik unsigned long delay) 1080c6fd2807SJeff Garzik { 1081c6fd2807SJeff Garzik int rc; 1082c6fd2807SJeff Garzik 1083c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK) 1084c6fd2807SJeff Garzik return; 1085c6fd2807SJeff Garzik 108665f27f38SDavid Howells PREPARE_DELAYED_WORK(&ap->port_task, fn); 108765f27f38SDavid Howells ap->port_task_data = data; 1088c6fd2807SJeff Garzik 1089c6fd2807SJeff Garzik rc = queue_delayed_work(ata_wq, &ap->port_task, delay); 1090c6fd2807SJeff Garzik 1091c6fd2807SJeff Garzik /* rc == 0 means that another user is using port task */ 1092c6fd2807SJeff Garzik WARN_ON(rc == 0); 1093c6fd2807SJeff Garzik } 1094c6fd2807SJeff Garzik 1095c6fd2807SJeff Garzik /** 1096c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1097c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1098c6fd2807SJeff Garzik * 1099c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1100c6fd2807SJeff Garzik * be running or scheduled. 1101c6fd2807SJeff Garzik * 1102c6fd2807SJeff Garzik * LOCKING: 1103c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1104c6fd2807SJeff Garzik */ 1105c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1106c6fd2807SJeff Garzik { 1107c6fd2807SJeff Garzik unsigned long flags; 1108c6fd2807SJeff Garzik 1109c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1110c6fd2807SJeff Garzik 1111c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1112c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK; 1113c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1114c6fd2807SJeff Garzik 1115c6fd2807SJeff Garzik DPRINTK("flush #1\n"); 1116c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1117c6fd2807SJeff Garzik 1118c6fd2807SJeff Garzik /* 1119c6fd2807SJeff Garzik * At this point, if a task is running, it's guaranteed to see 1120c6fd2807SJeff Garzik * the FLUSH flag; thus, it will never queue pio tasks again. 1121c6fd2807SJeff Garzik * Cancel and flush. 1122c6fd2807SJeff Garzik */ 1123c6fd2807SJeff Garzik if (!cancel_delayed_work(&ap->port_task)) { 1124c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1125c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n", 1126c6fd2807SJeff Garzik __FUNCTION__); 1127c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1128c6fd2807SJeff Garzik } 1129c6fd2807SJeff Garzik 1130c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1131c6fd2807SJeff Garzik ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK; 1132c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1133c6fd2807SJeff Garzik 1134c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1135c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1136c6fd2807SJeff Garzik } 1137c6fd2807SJeff Garzik 11387102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1139c6fd2807SJeff Garzik { 1140c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1141c6fd2807SJeff Garzik 1142c6fd2807SJeff Garzik complete(waiting); 1143c6fd2807SJeff Garzik } 1144c6fd2807SJeff Garzik 1145c6fd2807SJeff Garzik /** 11462432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1147c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1148c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1149c6fd2807SJeff Garzik * @cdb: CDB for packet command 1150c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 11512432697bSTejun Heo * @sg: sg list for the data buffer of the command 11522432697bSTejun Heo * @n_elem: Number of sg entries 1153c6fd2807SJeff Garzik * 1154c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1155c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1156c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1157c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1158c6fd2807SJeff Garzik * clean up after timeout. 1159c6fd2807SJeff Garzik * 1160c6fd2807SJeff Garzik * LOCKING: 1161c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1162c6fd2807SJeff Garzik * 1163c6fd2807SJeff Garzik * RETURNS: 1164c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1165c6fd2807SJeff Garzik */ 11662432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1167c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 11682432697bSTejun Heo int dma_dir, struct scatterlist *sg, 11692432697bSTejun Heo unsigned int n_elem) 1170c6fd2807SJeff Garzik { 1171c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1172c6fd2807SJeff Garzik u8 command = tf->command; 1173c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1174c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1175c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1176c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1177c6fd2807SJeff Garzik unsigned long flags; 1178c6fd2807SJeff Garzik unsigned int err_mask; 1179c6fd2807SJeff Garzik int rc; 1180c6fd2807SJeff Garzik 1181c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1182c6fd2807SJeff Garzik 1183c6fd2807SJeff Garzik /* no internal command while frozen */ 1184c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1185c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1186c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1187c6fd2807SJeff Garzik } 1188c6fd2807SJeff Garzik 1189c6fd2807SJeff Garzik /* initialize internal qc */ 1190c6fd2807SJeff Garzik 1191c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1192c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1193c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1194c6fd2807SJeff Garzik * EH stuff without converting to it. 1195c6fd2807SJeff Garzik */ 1196c6fd2807SJeff Garzik if (ap->ops->error_handler) 1197c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1198c6fd2807SJeff Garzik else 1199c6fd2807SJeff Garzik tag = 0; 1200c6fd2807SJeff Garzik 1201c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1202c6fd2807SJeff Garzik BUG(); 1203c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1204c6fd2807SJeff Garzik 1205c6fd2807SJeff Garzik qc->tag = tag; 1206c6fd2807SJeff Garzik qc->scsicmd = NULL; 1207c6fd2807SJeff Garzik qc->ap = ap; 1208c6fd2807SJeff Garzik qc->dev = dev; 1209c6fd2807SJeff Garzik ata_qc_reinit(qc); 1210c6fd2807SJeff Garzik 1211c6fd2807SJeff Garzik preempted_tag = ap->active_tag; 1212c6fd2807SJeff Garzik preempted_sactive = ap->sactive; 1213c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1214c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 1215c6fd2807SJeff Garzik ap->sactive = 0; 1216c6fd2807SJeff Garzik ap->qc_active = 0; 1217c6fd2807SJeff Garzik 1218c6fd2807SJeff Garzik /* prepare & issue qc */ 1219c6fd2807SJeff Garzik qc->tf = *tf; 1220c6fd2807SJeff Garzik if (cdb) 1221c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1222c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1223c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1224c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 12252432697bSTejun Heo unsigned int i, buflen = 0; 12262432697bSTejun Heo 12272432697bSTejun Heo for (i = 0; i < n_elem; i++) 12282432697bSTejun Heo buflen += sg[i].length; 12292432697bSTejun Heo 12302432697bSTejun Heo ata_sg_init(qc, sg, n_elem); 123149c80429SBrian King qc->nbytes = buflen; 1232c6fd2807SJeff Garzik } 1233c6fd2807SJeff Garzik 1234c6fd2807SJeff Garzik qc->private_data = &wait; 1235c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1236c6fd2807SJeff Garzik 1237c6fd2807SJeff Garzik ata_qc_issue(qc); 1238c6fd2807SJeff Garzik 1239c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1240c6fd2807SJeff Garzik 1241c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1242c6fd2807SJeff Garzik 1243c6fd2807SJeff Garzik ata_port_flush_task(ap); 1244c6fd2807SJeff Garzik 1245c6fd2807SJeff Garzik if (!rc) { 1246c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1247c6fd2807SJeff Garzik 1248c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1249c6fd2807SJeff Garzik * following test prevents us from completing the qc 1250c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1251c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1252c6fd2807SJeff Garzik */ 1253c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1254c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1255c6fd2807SJeff Garzik 1256c6fd2807SJeff Garzik if (ap->ops->error_handler) 1257c6fd2807SJeff Garzik ata_port_freeze(ap); 1258c6fd2807SJeff Garzik else 1259c6fd2807SJeff Garzik ata_qc_complete(qc); 1260c6fd2807SJeff Garzik 1261c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1262c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1263c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1264c6fd2807SJeff Garzik } 1265c6fd2807SJeff Garzik 1266c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1267c6fd2807SJeff Garzik } 1268c6fd2807SJeff Garzik 1269c6fd2807SJeff Garzik /* do post_internal_cmd */ 1270c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1271c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1272c6fd2807SJeff Garzik 127318d90debSAlan if ((qc->flags & ATA_QCFLAG_FAILED) && !qc->err_mask) { 1274c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1275c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1276c6fd2807SJeff Garzik "zero err_mask for failed " 1277c6fd2807SJeff Garzik "internal command, assuming AC_ERR_OTHER\n"); 1278c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1279c6fd2807SJeff Garzik } 1280c6fd2807SJeff Garzik 1281c6fd2807SJeff Garzik /* finish up */ 1282c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1283c6fd2807SJeff Garzik 1284c6fd2807SJeff Garzik *tf = qc->result_tf; 1285c6fd2807SJeff Garzik err_mask = qc->err_mask; 1286c6fd2807SJeff Garzik 1287c6fd2807SJeff Garzik ata_qc_free(qc); 1288c6fd2807SJeff Garzik ap->active_tag = preempted_tag; 1289c6fd2807SJeff Garzik ap->sactive = preempted_sactive; 1290c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1291c6fd2807SJeff Garzik 1292c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1293c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1294c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1295c6fd2807SJeff Garzik * port. 1296c6fd2807SJeff Garzik * 1297c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1298c6fd2807SJeff Garzik * command failure results in disabling the device in the 1299c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1300c6fd2807SJeff Garzik * 1301c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1302c6fd2807SJeff Garzik */ 1303c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1304c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1305c6fd2807SJeff Garzik ata_port_probe(ap); 1306c6fd2807SJeff Garzik } 1307c6fd2807SJeff Garzik 1308c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1309c6fd2807SJeff Garzik 1310c6fd2807SJeff Garzik return err_mask; 1311c6fd2807SJeff Garzik } 1312c6fd2807SJeff Garzik 1313c6fd2807SJeff Garzik /** 131433480a0eSTejun Heo * ata_exec_internal - execute libata internal command 13152432697bSTejun Heo * @dev: Device to which the command is sent 13162432697bSTejun Heo * @tf: Taskfile registers for the command and the result 13172432697bSTejun Heo * @cdb: CDB for packet command 13182432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 13192432697bSTejun Heo * @buf: Data buffer of the command 13202432697bSTejun Heo * @buflen: Length of data buffer 13212432697bSTejun Heo * 13222432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 13232432697bSTejun Heo * buffer instead of sg list. 13242432697bSTejun Heo * 13252432697bSTejun Heo * LOCKING: 13262432697bSTejun Heo * None. Should be called with kernel context, might sleep. 13272432697bSTejun Heo * 13282432697bSTejun Heo * RETURNS: 13292432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 13302432697bSTejun Heo */ 13312432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 13322432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 13332432697bSTejun Heo int dma_dir, void *buf, unsigned int buflen) 13342432697bSTejun Heo { 133533480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 133633480a0eSTejun Heo unsigned int n_elem = 0; 13372432697bSTejun Heo 133833480a0eSTejun Heo if (dma_dir != DMA_NONE) { 133933480a0eSTejun Heo WARN_ON(!buf); 13402432697bSTejun Heo sg_init_one(&sg, buf, buflen); 134133480a0eSTejun Heo psg = &sg; 134233480a0eSTejun Heo n_elem++; 134333480a0eSTejun Heo } 13442432697bSTejun Heo 134533480a0eSTejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); 13462432697bSTejun Heo } 13472432697bSTejun Heo 13482432697bSTejun Heo /** 1349c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1350c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1351c6fd2807SJeff Garzik * @cmd: Opcode to execute 1352c6fd2807SJeff Garzik * 1353c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1354c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1355c6fd2807SJeff Garzik * 1356c6fd2807SJeff Garzik * LOCKING: 1357c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1358c6fd2807SJeff Garzik * 1359c6fd2807SJeff Garzik * RETURNS: 1360c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1361c6fd2807SJeff Garzik */ 1362c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1363c6fd2807SJeff Garzik { 1364c6fd2807SJeff Garzik struct ata_taskfile tf; 1365c6fd2807SJeff Garzik 1366c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1367c6fd2807SJeff Garzik 1368c6fd2807SJeff Garzik tf.command = cmd; 1369c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1370c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1371c6fd2807SJeff Garzik 1372c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1373c6fd2807SJeff Garzik } 1374c6fd2807SJeff Garzik 1375c6fd2807SJeff Garzik /** 1376c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1377c6fd2807SJeff Garzik * @adev: ATA device 1378c6fd2807SJeff Garzik * 1379c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1380c6fd2807SJeff Garzik * by various controllers for chip configuration. 1381c6fd2807SJeff Garzik */ 1382c6fd2807SJeff Garzik 1383c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1384c6fd2807SJeff Garzik { 1385c6fd2807SJeff Garzik int pio; 1386c6fd2807SJeff Garzik int speed = adev->pio_mode - XFER_PIO_0; 1387c6fd2807SJeff Garzik 1388c6fd2807SJeff Garzik if (speed < 2) 1389c6fd2807SJeff Garzik return 0; 1390c6fd2807SJeff Garzik if (speed > 2) 1391c6fd2807SJeff Garzik return 1; 1392c6fd2807SJeff Garzik 1393c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1394c6fd2807SJeff Garzik 1395c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1396c6fd2807SJeff Garzik pio = adev->id[ATA_ID_EIDE_PIO]; 1397c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1398c6fd2807SJeff Garzik if (pio) { 1399c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1400c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1401c6fd2807SJeff Garzik return 1; 1402c6fd2807SJeff Garzik return 0; 1403c6fd2807SJeff Garzik } 1404c6fd2807SJeff Garzik } 1405c6fd2807SJeff Garzik return 0; 1406c6fd2807SJeff Garzik } 1407c6fd2807SJeff Garzik 1408c6fd2807SJeff Garzik /** 1409c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1410c6fd2807SJeff Garzik * @dev: target device 1411c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1412bff04647STejun Heo * @flags: ATA_READID_* flags 1413c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1414c6fd2807SJeff Garzik * 1415c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1416c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1417c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1418c6fd2807SJeff Garzik * for pre-ATA4 drives. 1419c6fd2807SJeff Garzik * 1420c6fd2807SJeff Garzik * LOCKING: 1421c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1422c6fd2807SJeff Garzik * 1423c6fd2807SJeff Garzik * RETURNS: 1424c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1425c6fd2807SJeff Garzik */ 1426c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1427bff04647STejun Heo unsigned int flags, u16 *id) 1428c6fd2807SJeff Garzik { 1429c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1430c6fd2807SJeff Garzik unsigned int class = *p_class; 1431c6fd2807SJeff Garzik struct ata_taskfile tf; 1432c6fd2807SJeff Garzik unsigned int err_mask = 0; 1433c6fd2807SJeff Garzik const char *reason; 1434c6fd2807SJeff Garzik int rc; 1435c6fd2807SJeff Garzik 1436c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 143744877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1438c6fd2807SJeff Garzik 1439c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1440c6fd2807SJeff Garzik 1441c6fd2807SJeff Garzik retry: 1442c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1443c6fd2807SJeff Garzik 1444c6fd2807SJeff Garzik switch (class) { 1445c6fd2807SJeff Garzik case ATA_DEV_ATA: 1446c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1447c6fd2807SJeff Garzik break; 1448c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1449c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1450c6fd2807SJeff Garzik break; 1451c6fd2807SJeff Garzik default: 1452c6fd2807SJeff Garzik rc = -ENODEV; 1453c6fd2807SJeff Garzik reason = "unsupported class"; 1454c6fd2807SJeff Garzik goto err_out; 1455c6fd2807SJeff Garzik } 1456c6fd2807SJeff Garzik 1457c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 145881afe893STejun Heo 145981afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 146081afe893STejun Heo * sure those are properly initialized. 146181afe893STejun Heo */ 146281afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 146381afe893STejun Heo 146481afe893STejun Heo /* Device presence detection is unreliable on some 146581afe893STejun Heo * controllers. Always poll IDENTIFY if available. 146681afe893STejun Heo */ 146781afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 1468c6fd2807SJeff Garzik 1469c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1470c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1471c6fd2807SJeff Garzik if (err_mask) { 1472800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 147355a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 147444877b4eSTejun Heo ap->print_id, dev->devno); 147555a8e2c8STejun Heo return -ENOENT; 147655a8e2c8STejun Heo } 147755a8e2c8STejun Heo 1478c6fd2807SJeff Garzik rc = -EIO; 1479c6fd2807SJeff Garzik reason = "I/O error"; 1480c6fd2807SJeff Garzik goto err_out; 1481c6fd2807SJeff Garzik } 1482c6fd2807SJeff Garzik 1483c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1484c6fd2807SJeff Garzik 1485c6fd2807SJeff Garzik /* sanity check */ 1486c6fd2807SJeff Garzik rc = -EINVAL; 1487c6fd2807SJeff Garzik reason = "device reports illegal type"; 14884a3381feSJeff Garzik 14894a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 14904a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 14914a3381feSJeff Garzik goto err_out; 14924a3381feSJeff Garzik } else { 14934a3381feSJeff Garzik if (ata_id_is_ata(id)) 1494c6fd2807SJeff Garzik goto err_out; 1495c6fd2807SJeff Garzik } 1496c6fd2807SJeff Garzik 1497bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1498c6fd2807SJeff Garzik /* 1499c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1500c6fd2807SJeff Garzik * SRST RESET 1501c6fd2807SJeff Garzik * IDENTIFY 1502c6fd2807SJeff Garzik * INITIALIZE DEVICE PARAMETERS 1503c6fd2807SJeff Garzik * anything else.. 1504c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 1505c6fd2807SJeff Garzik */ 1506c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1507c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1508c6fd2807SJeff Garzik if (err_mask) { 1509c6fd2807SJeff Garzik rc = -EIO; 1510c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1511c6fd2807SJeff Garzik goto err_out; 1512c6fd2807SJeff Garzik } 1513c6fd2807SJeff Garzik 1514c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1515c6fd2807SJeff Garzik * changed. reread the identify device info. 1516c6fd2807SJeff Garzik */ 1517bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1518c6fd2807SJeff Garzik goto retry; 1519c6fd2807SJeff Garzik } 1520c6fd2807SJeff Garzik } 1521c6fd2807SJeff Garzik 1522c6fd2807SJeff Garzik *p_class = class; 1523c6fd2807SJeff Garzik 1524c6fd2807SJeff Garzik return 0; 1525c6fd2807SJeff Garzik 1526c6fd2807SJeff Garzik err_out: 1527c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1528c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1529c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1530c6fd2807SJeff Garzik return rc; 1531c6fd2807SJeff Garzik } 1532c6fd2807SJeff Garzik 1533c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1534c6fd2807SJeff Garzik { 1535c6fd2807SJeff Garzik return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1536c6fd2807SJeff Garzik } 1537c6fd2807SJeff Garzik 1538c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1539c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1540c6fd2807SJeff Garzik { 1541c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1542c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1543c6fd2807SJeff Garzik 1544c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1545c6fd2807SJeff Garzik desc[0] = '\0'; 1546c6fd2807SJeff Garzik return; 1547c6fd2807SJeff Garzik } 15486919a0a6SAlan Cox if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { 15496919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 15506919a0a6SAlan Cox return; 15516919a0a6SAlan Cox } 1552c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1553cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1554c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1555c6fd2807SJeff Garzik } 1556c6fd2807SJeff Garzik 1557c6fd2807SJeff Garzik if (hdepth >= ddepth) 1558c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1559c6fd2807SJeff Garzik else 1560c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1561c6fd2807SJeff Garzik } 1562c6fd2807SJeff Garzik 1563c6fd2807SJeff Garzik static void ata_set_port_max_cmd_len(struct ata_port *ap) 1564c6fd2807SJeff Garzik { 1565c6fd2807SJeff Garzik int i; 1566c6fd2807SJeff Garzik 1567cca3974eSJeff Garzik if (ap->scsi_host) { 1568cca3974eSJeff Garzik unsigned int len = 0; 1569cca3974eSJeff Garzik 1570c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1571cca3974eSJeff Garzik len = max(len, ap->device[i].cdb_len); 1572cca3974eSJeff Garzik 1573cca3974eSJeff Garzik ap->scsi_host->max_cmd_len = len; 1574c6fd2807SJeff Garzik } 1575c6fd2807SJeff Garzik } 1576c6fd2807SJeff Garzik 1577c6fd2807SJeff Garzik /** 1578c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1579c6fd2807SJeff Garzik * @dev: Target device to configure 1580c6fd2807SJeff Garzik * 1581c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1582c6fd2807SJeff Garzik * driver specific fixups are also applied. 1583c6fd2807SJeff Garzik * 1584c6fd2807SJeff Garzik * LOCKING: 1585c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1586c6fd2807SJeff Garzik * 1587c6fd2807SJeff Garzik * RETURNS: 1588c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1589c6fd2807SJeff Garzik */ 1590efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1591c6fd2807SJeff Garzik { 1592c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1593efdaedc4STejun Heo int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO; 1594c6fd2807SJeff Garzik const u16 *id = dev->id; 1595c6fd2807SJeff Garzik unsigned int xfer_mask; 1596b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 15973f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 15983f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 1599c6fd2807SJeff Garzik int rc; 1600c6fd2807SJeff Garzik 1601c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 160244877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 160344877b4eSTejun Heo __FUNCTION__); 1604c6fd2807SJeff Garzik return 0; 1605c6fd2807SJeff Garzik } 1606c6fd2807SJeff Garzik 1607c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 160844877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1609c6fd2807SJeff Garzik 161008573a86SKristen Carlson Accardi /* set _SDD */ 161108573a86SKristen Carlson Accardi rc = ata_acpi_push_id(ap, dev->devno); 161208573a86SKristen Carlson Accardi if (rc) { 161308573a86SKristen Carlson Accardi ata_dev_printk(dev, KERN_WARNING, "failed to set _SDD(%d)\n", 161408573a86SKristen Carlson Accardi rc); 161508573a86SKristen Carlson Accardi } 161608573a86SKristen Carlson Accardi 161708573a86SKristen Carlson Accardi /* retrieve and execute the ATA task file of _GTF */ 161808573a86SKristen Carlson Accardi ata_acpi_exec_tfs(ap); 161908573a86SKristen Carlson Accardi 1620c6fd2807SJeff Garzik /* print device capabilities */ 1621c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1622c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1623c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1624c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1625c6fd2807SJeff Garzik __FUNCTION__, 1626c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1627c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1628c6fd2807SJeff Garzik 1629c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1630c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1631c6fd2807SJeff Garzik dev->max_sectors = 0; 1632c6fd2807SJeff Garzik dev->cdb_len = 0; 1633c6fd2807SJeff Garzik dev->n_sectors = 0; 1634c6fd2807SJeff Garzik dev->cylinders = 0; 1635c6fd2807SJeff Garzik dev->heads = 0; 1636c6fd2807SJeff Garzik dev->sectors = 0; 1637c6fd2807SJeff Garzik 1638c6fd2807SJeff Garzik /* 1639c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1640c6fd2807SJeff Garzik */ 1641c6fd2807SJeff Garzik 1642c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1643c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1644c6fd2807SJeff Garzik 1645c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1646c6fd2807SJeff Garzik ata_dump_id(id); 1647c6fd2807SJeff Garzik 1648c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1649c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1650b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1651b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 165244877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 165344877b4eSTejun Heo "supports DRM functions and may " 165444877b4eSTejun Heo "not be fully accessable.\n"); 1655b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1656b352e57dSAlan Cox } 1657b352e57dSAlan Cox else 1658b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1659b352e57dSAlan Cox 1660c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1661c6fd2807SJeff Garzik 16623f64f565SEric D. Mudama /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 1663591a6e8eSJeff Garzik ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 16643f64f565SEric D. Mudama sizeof(fwrevbuf)); 16653f64f565SEric D. Mudama 1666591a6e8eSJeff Garzik ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 16673f64f565SEric D. Mudama sizeof(modelbuf)); 16683f64f565SEric D. Mudama 16693f64f565SEric D. Mudama if (dev->id[59] & 0x100) 16703f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 16713f64f565SEric D. Mudama 1672c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1673c6fd2807SJeff Garzik const char *lba_desc; 1674c6fd2807SJeff Garzik char ncq_desc[20]; 1675c6fd2807SJeff Garzik 1676c6fd2807SJeff Garzik lba_desc = "LBA"; 1677c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1678c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1679c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1680c6fd2807SJeff Garzik lba_desc = "LBA48"; 16816fc49adbSTejun Heo 16826fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 16836fc49adbSTejun Heo ata_id_has_flush_ext(id)) 16846fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1685c6fd2807SJeff Garzik } 1686c6fd2807SJeff Garzik 1687c6fd2807SJeff Garzik /* config NCQ */ 1688c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1689c6fd2807SJeff Garzik 1690c6fd2807SJeff Garzik /* print device info to dmesg */ 16913f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 16923f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 16933f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 16943f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 16953f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 16963f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 16973f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 1698c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 16993f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 17003f64f565SEric D. Mudama } 1701c6fd2807SJeff Garzik } else { 1702c6fd2807SJeff Garzik /* CHS */ 1703c6fd2807SJeff Garzik 1704c6fd2807SJeff Garzik /* Default translation */ 1705c6fd2807SJeff Garzik dev->cylinders = id[1]; 1706c6fd2807SJeff Garzik dev->heads = id[3]; 1707c6fd2807SJeff Garzik dev->sectors = id[6]; 1708c6fd2807SJeff Garzik 1709c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 1710c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 1711c6fd2807SJeff Garzik dev->cylinders = id[54]; 1712c6fd2807SJeff Garzik dev->heads = id[55]; 1713c6fd2807SJeff Garzik dev->sectors = id[56]; 1714c6fd2807SJeff Garzik } 1715c6fd2807SJeff Garzik 1716c6fd2807SJeff Garzik /* print device info to dmesg */ 17173f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 1718c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 17193f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 17203f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 17213f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 17223f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 17233f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 17243f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 17253f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 17263f64f565SEric D. Mudama dev->heads, dev->sectors); 17273f64f565SEric D. Mudama } 1728c6fd2807SJeff Garzik } 1729c6fd2807SJeff Garzik 1730c6fd2807SJeff Garzik dev->cdb_len = 16; 1731c6fd2807SJeff Garzik } 1732c6fd2807SJeff Garzik 1733c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 1734c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 1735c6fd2807SJeff Garzik char *cdb_intr_string = ""; 1736c6fd2807SJeff Garzik 1737c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 1738c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 1739c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1740c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1741c6fd2807SJeff Garzik "unsupported CDB len\n"); 1742c6fd2807SJeff Garzik rc = -EINVAL; 1743c6fd2807SJeff Garzik goto err_out_nosup; 1744c6fd2807SJeff Garzik } 1745c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 1746c6fd2807SJeff Garzik 1747c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 1748c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 1749c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 1750c6fd2807SJeff Garzik } 1751c6fd2807SJeff Garzik 1752c6fd2807SJeff Garzik /* print device info to dmesg */ 1753c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1754c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", 1755c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1756c6fd2807SJeff Garzik cdb_intr_string); 1757c6fd2807SJeff Garzik } 1758c6fd2807SJeff Garzik 1759914ed354STejun Heo /* determine max_sectors */ 1760914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 1761914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 1762914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 1763914ed354STejun Heo 176493590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 176593590859SAlan Cox /* Let the user know. We don't want to disallow opens for 176693590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 176793590859SAlan Cox idiot */ 176893590859SAlan Cox if (print_info) { 176993590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 177093590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 177193590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 177293590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 177393590859SAlan Cox } 177493590859SAlan Cox } 177593590859SAlan Cox 1776c6fd2807SJeff Garzik ata_set_port_max_cmd_len(ap); 1777c6fd2807SJeff Garzik 1778c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 1779c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 1780c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1781c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1782c6fd2807SJeff Garzik "applying bridge limits\n"); 1783c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 1784c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 1785c6fd2807SJeff Garzik } 1786c6fd2807SJeff Garzik 1787c6fd2807SJeff Garzik if (ap->ops->dev_config) 1788c6fd2807SJeff Garzik ap->ops->dev_config(ap, dev); 1789c6fd2807SJeff Garzik 1790c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1791c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 1792c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 1793c6fd2807SJeff Garzik return 0; 1794c6fd2807SJeff Garzik 1795c6fd2807SJeff Garzik err_out_nosup: 1796c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1797c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1798c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 1799c6fd2807SJeff Garzik return rc; 1800c6fd2807SJeff Garzik } 1801c6fd2807SJeff Garzik 1802c6fd2807SJeff Garzik /** 1803c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 1804c6fd2807SJeff Garzik * @ap: Bus to probe 1805c6fd2807SJeff Garzik * 1806c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 1807c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 1808c6fd2807SJeff Garzik * the bus. 1809c6fd2807SJeff Garzik * 1810c6fd2807SJeff Garzik * LOCKING: 1811c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1812c6fd2807SJeff Garzik * 1813c6fd2807SJeff Garzik * RETURNS: 1814c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 1815c6fd2807SJeff Garzik */ 1816c6fd2807SJeff Garzik 1817c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 1818c6fd2807SJeff Garzik { 1819c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 1820c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 18214ae72a1eSTejun Heo int i, rc; 1822c6fd2807SJeff Garzik struct ata_device *dev; 1823c6fd2807SJeff Garzik 1824c6fd2807SJeff Garzik ata_port_probe(ap); 1825c6fd2807SJeff Garzik 1826c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1827c6fd2807SJeff Garzik tries[i] = ATA_PROBE_MAX_TRIES; 1828c6fd2807SJeff Garzik 1829c6fd2807SJeff Garzik retry: 1830c6fd2807SJeff Garzik /* reset and determine device classes */ 1831c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 1832c6fd2807SJeff Garzik 1833c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1834c6fd2807SJeff Garzik dev = &ap->device[i]; 1835c6fd2807SJeff Garzik 1836c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 1837c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 1838c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 1839c6fd2807SJeff Garzik else 1840c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 1841c6fd2807SJeff Garzik 1842c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 1843c6fd2807SJeff Garzik } 1844c6fd2807SJeff Garzik 1845c6fd2807SJeff Garzik ata_port_probe(ap); 1846c6fd2807SJeff Garzik 1847c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 1848c6fd2807SJeff Garzik state is undefined. Record the mode */ 1849c6fd2807SJeff Garzik 1850c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1851c6fd2807SJeff Garzik ap->device[i].pio_mode = XFER_PIO_0; 1852c6fd2807SJeff Garzik 1853c6fd2807SJeff Garzik /* read IDENTIFY page and configure devices */ 1854c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1855c6fd2807SJeff Garzik dev = &ap->device[i]; 1856c6fd2807SJeff Garzik 1857c6fd2807SJeff Garzik if (tries[i]) 1858c6fd2807SJeff Garzik dev->class = classes[i]; 1859c6fd2807SJeff Garzik 1860c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 1861c6fd2807SJeff Garzik continue; 1862c6fd2807SJeff Garzik 1863bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 1864bff04647STejun Heo dev->id); 1865c6fd2807SJeff Garzik if (rc) 1866c6fd2807SJeff Garzik goto fail; 1867c6fd2807SJeff Garzik 1868efdaedc4STejun Heo ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; 1869efdaedc4STejun Heo rc = ata_dev_configure(dev); 1870efdaedc4STejun Heo ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 1871c6fd2807SJeff Garzik if (rc) 1872c6fd2807SJeff Garzik goto fail; 1873c6fd2807SJeff Garzik } 1874c6fd2807SJeff Garzik 1875c6fd2807SJeff Garzik /* configure transfer mode */ 1876c6fd2807SJeff Garzik rc = ata_set_mode(ap, &dev); 18774ae72a1eSTejun Heo if (rc) 1878c6fd2807SJeff Garzik goto fail; 1879c6fd2807SJeff Garzik 1880c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1881c6fd2807SJeff Garzik if (ata_dev_enabled(&ap->device[i])) 1882c6fd2807SJeff Garzik return 0; 1883c6fd2807SJeff Garzik 1884c6fd2807SJeff Garzik /* no device present, disable port */ 1885c6fd2807SJeff Garzik ata_port_disable(ap); 1886c6fd2807SJeff Garzik ap->ops->port_disable(ap); 1887c6fd2807SJeff Garzik return -ENODEV; 1888c6fd2807SJeff Garzik 1889c6fd2807SJeff Garzik fail: 18904ae72a1eSTejun Heo tries[dev->devno]--; 18914ae72a1eSTejun Heo 1892c6fd2807SJeff Garzik switch (rc) { 1893c6fd2807SJeff Garzik case -EINVAL: 18944ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 1895c6fd2807SJeff Garzik tries[dev->devno] = 0; 1896c6fd2807SJeff Garzik break; 18974ae72a1eSTejun Heo 18984ae72a1eSTejun Heo case -ENODEV: 18994ae72a1eSTejun Heo /* give it just one more chance */ 19004ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 1901c6fd2807SJeff Garzik case -EIO: 19024ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 19034ae72a1eSTejun Heo /* This is the last chance, better to slow 19044ae72a1eSTejun Heo * down than lose it. 19054ae72a1eSTejun Heo */ 1906c6fd2807SJeff Garzik sata_down_spd_limit(ap); 19074ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 19084ae72a1eSTejun Heo } 1909c6fd2807SJeff Garzik } 1910c6fd2807SJeff Garzik 19114ae72a1eSTejun Heo if (!tries[dev->devno]) 1912c6fd2807SJeff Garzik ata_dev_disable(dev); 1913c6fd2807SJeff Garzik 1914c6fd2807SJeff Garzik goto retry; 1915c6fd2807SJeff Garzik } 1916c6fd2807SJeff Garzik 1917c6fd2807SJeff Garzik /** 1918c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 1919c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 1920c6fd2807SJeff Garzik * 1921c6fd2807SJeff Garzik * Modify @ap data structure such that the system 1922c6fd2807SJeff Garzik * thinks that the entire port is enabled. 1923c6fd2807SJeff Garzik * 1924cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 1925c6fd2807SJeff Garzik * serialization. 1926c6fd2807SJeff Garzik */ 1927c6fd2807SJeff Garzik 1928c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 1929c6fd2807SJeff Garzik { 1930c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 1931c6fd2807SJeff Garzik } 1932c6fd2807SJeff Garzik 1933c6fd2807SJeff Garzik /** 1934c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 1935c6fd2807SJeff Garzik * @ap: SATA port to printk link status about 1936c6fd2807SJeff Garzik * 1937c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 1938c6fd2807SJeff Garzik * 1939c6fd2807SJeff Garzik * LOCKING: 1940c6fd2807SJeff Garzik * None. 1941c6fd2807SJeff Garzik */ 1942c6fd2807SJeff Garzik static void sata_print_link_status(struct ata_port *ap) 1943c6fd2807SJeff Garzik { 1944c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 1945c6fd2807SJeff Garzik 1946c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_STATUS, &sstatus)) 1947c6fd2807SJeff Garzik return; 1948c6fd2807SJeff Garzik sata_scr_read(ap, SCR_CONTROL, &scontrol); 1949c6fd2807SJeff Garzik 1950c6fd2807SJeff Garzik if (ata_port_online(ap)) { 1951c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 1952c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1953c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 1954c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 1955c6fd2807SJeff Garzik } else { 1956c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1957c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 1958c6fd2807SJeff Garzik sstatus, scontrol); 1959c6fd2807SJeff Garzik } 1960c6fd2807SJeff Garzik } 1961c6fd2807SJeff Garzik 1962c6fd2807SJeff Garzik /** 1963c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 1964c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 1965c6fd2807SJeff Garzik * 1966c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 1967c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 1968c6fd2807SJeff Garzik * clear any reset condition. 1969c6fd2807SJeff Garzik * 1970c6fd2807SJeff Garzik * LOCKING: 1971c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1972c6fd2807SJeff Garzik * 1973c6fd2807SJeff Garzik */ 1974c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 1975c6fd2807SJeff Garzik { 1976c6fd2807SJeff Garzik u32 sstatus; 1977c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 1978c6fd2807SJeff Garzik 1979c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 1980c6fd2807SJeff Garzik /* issue phy wake/reset */ 1981c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x301); 1982c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 1983c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 1984c6fd2807SJeff Garzik mdelay(1); 1985c6fd2807SJeff Garzik } 1986c6fd2807SJeff Garzik /* phy wake/clear reset */ 1987c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x300); 1988c6fd2807SJeff Garzik 1989c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 1990c6fd2807SJeff Garzik do { 1991c6fd2807SJeff Garzik msleep(200); 1992c6fd2807SJeff Garzik sata_scr_read(ap, SCR_STATUS, &sstatus); 1993c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 1994c6fd2807SJeff Garzik break; 1995c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 1996c6fd2807SJeff Garzik 1997c6fd2807SJeff Garzik /* print link status */ 1998c6fd2807SJeff Garzik sata_print_link_status(ap); 1999c6fd2807SJeff Garzik 2000c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 2001c6fd2807SJeff Garzik if (!ata_port_offline(ap)) 2002c6fd2807SJeff Garzik ata_port_probe(ap); 2003c6fd2807SJeff Garzik else 2004c6fd2807SJeff Garzik ata_port_disable(ap); 2005c6fd2807SJeff Garzik 2006c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2007c6fd2807SJeff Garzik return; 2008c6fd2807SJeff Garzik 2009c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 2010c6fd2807SJeff Garzik ata_port_disable(ap); 2011c6fd2807SJeff Garzik return; 2012c6fd2807SJeff Garzik } 2013c6fd2807SJeff Garzik 2014c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 2015c6fd2807SJeff Garzik } 2016c6fd2807SJeff Garzik 2017c6fd2807SJeff Garzik /** 2018c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 2019c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2020c6fd2807SJeff Garzik * 2021c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 2022c6fd2807SJeff Garzik * the bus for devices. 2023c6fd2807SJeff Garzik * 2024c6fd2807SJeff Garzik * LOCKING: 2025c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2026c6fd2807SJeff Garzik * 2027c6fd2807SJeff Garzik */ 2028c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 2029c6fd2807SJeff Garzik { 2030c6fd2807SJeff Garzik __sata_phy_reset(ap); 2031c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2032c6fd2807SJeff Garzik return; 2033c6fd2807SJeff Garzik ata_bus_reset(ap); 2034c6fd2807SJeff Garzik } 2035c6fd2807SJeff Garzik 2036c6fd2807SJeff Garzik /** 2037c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2038c6fd2807SJeff Garzik * @adev: device 2039c6fd2807SJeff Garzik * 2040c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2041c6fd2807SJeff Garzik * present NULL is returned 2042c6fd2807SJeff Garzik */ 2043c6fd2807SJeff Garzik 2044c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2045c6fd2807SJeff Garzik { 2046c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 2047c6fd2807SJeff Garzik struct ata_device *pair = &ap->device[1 - adev->devno]; 2048c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2049c6fd2807SJeff Garzik return NULL; 2050c6fd2807SJeff Garzik return pair; 2051c6fd2807SJeff Garzik } 2052c6fd2807SJeff Garzik 2053c6fd2807SJeff Garzik /** 2054c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2055c6fd2807SJeff Garzik * @ap: Port to be disabled. 2056c6fd2807SJeff Garzik * 2057c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2058c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2059c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2060c6fd2807SJeff Garzik * on this port. 2061c6fd2807SJeff Garzik * 2062cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2063c6fd2807SJeff Garzik * serialization. 2064c6fd2807SJeff Garzik */ 2065c6fd2807SJeff Garzik 2066c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2067c6fd2807SJeff Garzik { 2068c6fd2807SJeff Garzik ap->device[0].class = ATA_DEV_NONE; 2069c6fd2807SJeff Garzik ap->device[1].class = ATA_DEV_NONE; 2070c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2071c6fd2807SJeff Garzik } 2072c6fd2807SJeff Garzik 2073c6fd2807SJeff Garzik /** 2074c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2075c6fd2807SJeff Garzik * @ap: Port to adjust SATA spd limit for 2076c6fd2807SJeff Garzik * 2077c6fd2807SJeff Garzik * Adjust SATA spd limit of @ap downward. Note that this 2078c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2079c6fd2807SJeff Garzik * using sata_set_spd(). 2080c6fd2807SJeff Garzik * 2081c6fd2807SJeff Garzik * LOCKING: 2082c6fd2807SJeff Garzik * Inherited from caller. 2083c6fd2807SJeff Garzik * 2084c6fd2807SJeff Garzik * RETURNS: 2085c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2086c6fd2807SJeff Garzik */ 2087c6fd2807SJeff Garzik int sata_down_spd_limit(struct ata_port *ap) 2088c6fd2807SJeff Garzik { 2089c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2090c6fd2807SJeff Garzik int rc, highbit; 2091c6fd2807SJeff Garzik 2092c6fd2807SJeff Garzik rc = sata_scr_read(ap, SCR_STATUS, &sstatus); 2093c6fd2807SJeff Garzik if (rc) 2094c6fd2807SJeff Garzik return rc; 2095c6fd2807SJeff Garzik 2096c6fd2807SJeff Garzik mask = ap->sata_spd_limit; 2097c6fd2807SJeff Garzik if (mask <= 1) 2098c6fd2807SJeff Garzik return -EINVAL; 2099c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2100c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2101c6fd2807SJeff Garzik 2102c6fd2807SJeff Garzik spd = (sstatus >> 4) & 0xf; 2103c6fd2807SJeff Garzik if (spd <= 1) 2104c6fd2807SJeff Garzik return -EINVAL; 2105c6fd2807SJeff Garzik spd--; 2106c6fd2807SJeff Garzik mask &= (1 << spd) - 1; 2107c6fd2807SJeff Garzik if (!mask) 2108c6fd2807SJeff Garzik return -EINVAL; 2109c6fd2807SJeff Garzik 2110c6fd2807SJeff Garzik ap->sata_spd_limit = mask; 2111c6fd2807SJeff Garzik 2112c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", 2113c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2114c6fd2807SJeff Garzik 2115c6fd2807SJeff Garzik return 0; 2116c6fd2807SJeff Garzik } 2117c6fd2807SJeff Garzik 2118c6fd2807SJeff Garzik static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) 2119c6fd2807SJeff Garzik { 2120c6fd2807SJeff Garzik u32 spd, limit; 2121c6fd2807SJeff Garzik 2122c6fd2807SJeff Garzik if (ap->sata_spd_limit == UINT_MAX) 2123c6fd2807SJeff Garzik limit = 0; 2124c6fd2807SJeff Garzik else 2125c6fd2807SJeff Garzik limit = fls(ap->sata_spd_limit); 2126c6fd2807SJeff Garzik 2127c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 2128c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 2129c6fd2807SJeff Garzik 2130c6fd2807SJeff Garzik return spd != limit; 2131c6fd2807SJeff Garzik } 2132c6fd2807SJeff Garzik 2133c6fd2807SJeff Garzik /** 2134c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2135c6fd2807SJeff Garzik * @ap: Port in question 2136c6fd2807SJeff Garzik * 2137c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2138c6fd2807SJeff Garzik * @ap->sata_spd_limit. This function is used to determine 2139c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2140c6fd2807SJeff Garzik * configuration. 2141c6fd2807SJeff Garzik * 2142c6fd2807SJeff Garzik * LOCKING: 2143c6fd2807SJeff Garzik * Inherited from caller. 2144c6fd2807SJeff Garzik * 2145c6fd2807SJeff Garzik * RETURNS: 2146c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2147c6fd2807SJeff Garzik */ 2148c6fd2807SJeff Garzik int sata_set_spd_needed(struct ata_port *ap) 2149c6fd2807SJeff Garzik { 2150c6fd2807SJeff Garzik u32 scontrol; 2151c6fd2807SJeff Garzik 2152c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) 2153c6fd2807SJeff Garzik return 0; 2154c6fd2807SJeff Garzik 2155c6fd2807SJeff Garzik return __sata_set_spd_needed(ap, &scontrol); 2156c6fd2807SJeff Garzik } 2157c6fd2807SJeff Garzik 2158c6fd2807SJeff Garzik /** 2159c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2160c6fd2807SJeff Garzik * @ap: Port to set SATA spd for 2161c6fd2807SJeff Garzik * 2162c6fd2807SJeff Garzik * Set SATA spd of @ap according to sata_spd_limit. 2163c6fd2807SJeff Garzik * 2164c6fd2807SJeff Garzik * LOCKING: 2165c6fd2807SJeff Garzik * Inherited from caller. 2166c6fd2807SJeff Garzik * 2167c6fd2807SJeff Garzik * RETURNS: 2168c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2169c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2170c6fd2807SJeff Garzik */ 2171c6fd2807SJeff Garzik int sata_set_spd(struct ata_port *ap) 2172c6fd2807SJeff Garzik { 2173c6fd2807SJeff Garzik u32 scontrol; 2174c6fd2807SJeff Garzik int rc; 2175c6fd2807SJeff Garzik 2176c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2177c6fd2807SJeff Garzik return rc; 2178c6fd2807SJeff Garzik 2179c6fd2807SJeff Garzik if (!__sata_set_spd_needed(ap, &scontrol)) 2180c6fd2807SJeff Garzik return 0; 2181c6fd2807SJeff Garzik 2182c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2183c6fd2807SJeff Garzik return rc; 2184c6fd2807SJeff Garzik 2185c6fd2807SJeff Garzik return 1; 2186c6fd2807SJeff Garzik } 2187c6fd2807SJeff Garzik 2188c6fd2807SJeff Garzik /* 2189c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2190c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2191c6fd2807SJeff Garzik */ 2192c6fd2807SJeff Garzik /* 2193b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2194c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2195b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2196b352e57dSAlan Cox * 2197b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2198c6fd2807SJeff Garzik */ 2199c6fd2807SJeff Garzik 2200c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2201c6fd2807SJeff Garzik 2202c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2203c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2204c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2205c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2206c6fd2807SJeff Garzik 2207b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2208b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2209c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2210c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2211c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2212c6fd2807SJeff Garzik 2213c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2214c6fd2807SJeff Garzik 2215c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2216c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2217c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2218c6fd2807SJeff Garzik 2219c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2220c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2221c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2222c6fd2807SJeff Garzik 2223b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2224b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2225c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2226c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2227c6fd2807SJeff Garzik 2228c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2229c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2230c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2231c6fd2807SJeff Garzik 2232c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2233c6fd2807SJeff Garzik 2234c6fd2807SJeff Garzik { 0xFF } 2235c6fd2807SJeff Garzik }; 2236c6fd2807SJeff Garzik 2237c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2238c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2239c6fd2807SJeff Garzik 2240c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2241c6fd2807SJeff Garzik { 2242c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2243c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2244c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2245c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2246c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2247c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2248c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2249c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2250c6fd2807SJeff Garzik } 2251c6fd2807SJeff Garzik 2252c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2253c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2254c6fd2807SJeff Garzik { 2255c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2256c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2257c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2258c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2259c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2260c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2261c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2262c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2263c6fd2807SJeff Garzik } 2264c6fd2807SJeff Garzik 2265c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2266c6fd2807SJeff Garzik { 2267c6fd2807SJeff Garzik const struct ata_timing *t; 2268c6fd2807SJeff Garzik 2269c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2270c6fd2807SJeff Garzik if (t->mode == 0xFF) 2271c6fd2807SJeff Garzik return NULL; 2272c6fd2807SJeff Garzik return t; 2273c6fd2807SJeff Garzik } 2274c6fd2807SJeff Garzik 2275c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2276c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2277c6fd2807SJeff Garzik { 2278c6fd2807SJeff Garzik const struct ata_timing *s; 2279c6fd2807SJeff Garzik struct ata_timing p; 2280c6fd2807SJeff Garzik 2281c6fd2807SJeff Garzik /* 2282c6fd2807SJeff Garzik * Find the mode. 2283c6fd2807SJeff Garzik */ 2284c6fd2807SJeff Garzik 2285c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2286c6fd2807SJeff Garzik return -EINVAL; 2287c6fd2807SJeff Garzik 2288c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2289c6fd2807SJeff Garzik 2290c6fd2807SJeff Garzik /* 2291c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2292c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2293c6fd2807SJeff Garzik */ 2294c6fd2807SJeff Garzik 2295c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2296c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2297c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2298c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2299c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2300c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2301c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2302c6fd2807SJeff Garzik } 2303c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2304c6fd2807SJeff Garzik } 2305c6fd2807SJeff Garzik 2306c6fd2807SJeff Garzik /* 2307c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2308c6fd2807SJeff Garzik */ 2309c6fd2807SJeff Garzik 2310c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2311c6fd2807SJeff Garzik 2312c6fd2807SJeff Garzik /* 2313c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2314c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2315c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2316c6fd2807SJeff Garzik */ 2317c6fd2807SJeff Garzik 2318fd3367afSAlan if (speed > XFER_PIO_6) { 2319c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2320c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2321c6fd2807SJeff Garzik } 2322c6fd2807SJeff Garzik 2323c6fd2807SJeff Garzik /* 2324c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2325c6fd2807SJeff Garzik */ 2326c6fd2807SJeff Garzik 2327c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2328c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2329c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2330c6fd2807SJeff Garzik } 2331c6fd2807SJeff Garzik 2332c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2333c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2334c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2335c6fd2807SJeff Garzik } 2336c6fd2807SJeff Garzik 2337c6fd2807SJeff Garzik return 0; 2338c6fd2807SJeff Garzik } 2339c6fd2807SJeff Garzik 2340c6fd2807SJeff Garzik /** 2341c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2342c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2343458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 2344c6fd2807SJeff Garzik * 2345c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2346c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2347c6fd2807SJeff Garzik * will apply the limit. 2348c6fd2807SJeff Garzik * 2349c6fd2807SJeff Garzik * LOCKING: 2350c6fd2807SJeff Garzik * Inherited from caller. 2351c6fd2807SJeff Garzik * 2352c6fd2807SJeff Garzik * RETURNS: 2353c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2354c6fd2807SJeff Garzik */ 2355458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 2356c6fd2807SJeff Garzik { 2357458337dbSTejun Heo char buf[32]; 2358458337dbSTejun Heo unsigned int orig_mask, xfer_mask; 2359458337dbSTejun Heo unsigned int pio_mask, mwdma_mask, udma_mask; 2360458337dbSTejun Heo int quiet, highbit; 2361c6fd2807SJeff Garzik 2362458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 2363458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 2364458337dbSTejun Heo 2365458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 2366458337dbSTejun Heo dev->mwdma_mask, 2367c6fd2807SJeff Garzik dev->udma_mask); 2368458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 2369c6fd2807SJeff Garzik 2370458337dbSTejun Heo switch (sel) { 2371458337dbSTejun Heo case ATA_DNXFER_PIO: 2372458337dbSTejun Heo highbit = fls(pio_mask) - 1; 2373458337dbSTejun Heo pio_mask &= ~(1 << highbit); 2374458337dbSTejun Heo break; 2375458337dbSTejun Heo 2376458337dbSTejun Heo case ATA_DNXFER_DMA: 2377458337dbSTejun Heo if (udma_mask) { 2378458337dbSTejun Heo highbit = fls(udma_mask) - 1; 2379458337dbSTejun Heo udma_mask &= ~(1 << highbit); 2380458337dbSTejun Heo if (!udma_mask) 2381458337dbSTejun Heo return -ENOENT; 2382458337dbSTejun Heo } else if (mwdma_mask) { 2383458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 2384458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 2385458337dbSTejun Heo if (!mwdma_mask) 2386458337dbSTejun Heo return -ENOENT; 2387458337dbSTejun Heo } 2388458337dbSTejun Heo break; 2389458337dbSTejun Heo 2390458337dbSTejun Heo case ATA_DNXFER_40C: 2391458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 2392458337dbSTejun Heo break; 2393458337dbSTejun Heo 2394458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 2395458337dbSTejun Heo pio_mask &= 1; 2396458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 2397458337dbSTejun Heo mwdma_mask = 0; 2398458337dbSTejun Heo udma_mask = 0; 2399458337dbSTejun Heo break; 2400458337dbSTejun Heo 2401458337dbSTejun Heo default: 2402458337dbSTejun Heo BUG(); 2403458337dbSTejun Heo } 2404458337dbSTejun Heo 2405458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 2406458337dbSTejun Heo 2407458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 2408458337dbSTejun Heo return -ENOENT; 2409458337dbSTejun Heo 2410458337dbSTejun Heo if (!quiet) { 2411458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 2412458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 2413458337dbSTejun Heo ata_mode_string(xfer_mask), 2414458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 2415458337dbSTejun Heo else 2416458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 2417458337dbSTejun Heo ata_mode_string(xfer_mask)); 2418458337dbSTejun Heo 2419458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 2420458337dbSTejun Heo "limiting speed to %s\n", buf); 2421458337dbSTejun Heo } 2422c6fd2807SJeff Garzik 2423c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2424c6fd2807SJeff Garzik &dev->udma_mask); 2425c6fd2807SJeff Garzik 2426c6fd2807SJeff Garzik return 0; 2427c6fd2807SJeff Garzik } 2428c6fd2807SJeff Garzik 2429c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2430c6fd2807SJeff Garzik { 2431baa1e78aSTejun Heo struct ata_eh_context *ehc = &dev->ap->eh_context; 2432c6fd2807SJeff Garzik unsigned int err_mask; 2433c6fd2807SJeff Garzik int rc; 2434c6fd2807SJeff Garzik 2435c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2436c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2437c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2438c6fd2807SJeff Garzik 2439c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 244011750a40SAlan /* Old CFA may refuse this command, which is just fine */ 244111750a40SAlan if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) 244211750a40SAlan err_mask &= ~AC_ERR_DEV; 244311750a40SAlan 2444c6fd2807SJeff Garzik if (err_mask) { 2445c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2446c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2447c6fd2807SJeff Garzik return -EIO; 2448c6fd2807SJeff Garzik } 2449c6fd2807SJeff Garzik 2450baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2451c6fd2807SJeff Garzik rc = ata_dev_revalidate(dev, 0); 2452baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2453c6fd2807SJeff Garzik if (rc) 2454c6fd2807SJeff Garzik return rc; 2455c6fd2807SJeff Garzik 2456c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2457c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2458c6fd2807SJeff Garzik 2459c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2460c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2461c6fd2807SJeff Garzik return 0; 2462c6fd2807SJeff Garzik } 2463c6fd2807SJeff Garzik 2464c6fd2807SJeff Garzik /** 2465c6fd2807SJeff Garzik * ata_set_mode - Program timings and issue SET FEATURES - XFER 2466c6fd2807SJeff Garzik * @ap: port on which timings will be programmed 2467c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2468c6fd2807SJeff Garzik * 2469c6fd2807SJeff Garzik * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 2470c6fd2807SJeff Garzik * ata_set_mode() fails, pointer to the failing device is 2471c6fd2807SJeff Garzik * returned in @r_failed_dev. 2472c6fd2807SJeff Garzik * 2473c6fd2807SJeff Garzik * LOCKING: 2474c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2475c6fd2807SJeff Garzik * 2476c6fd2807SJeff Garzik * RETURNS: 2477c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2478c6fd2807SJeff Garzik */ 2479c6fd2807SJeff Garzik int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 2480c6fd2807SJeff Garzik { 2481c6fd2807SJeff Garzik struct ata_device *dev; 2482c6fd2807SJeff Garzik int i, rc = 0, used_dma = 0, found = 0; 2483c6fd2807SJeff Garzik 2484c6fd2807SJeff Garzik /* has private set_mode? */ 2485b229a7b0SAlan if (ap->ops->set_mode) 2486b229a7b0SAlan return ap->ops->set_mode(ap, r_failed_dev); 2487c6fd2807SJeff Garzik 2488c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2489c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2490c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2491c6fd2807SJeff Garzik 2492c6fd2807SJeff Garzik dev = &ap->device[i]; 2493c6fd2807SJeff Garzik 2494c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2495c6fd2807SJeff Garzik continue; 2496c6fd2807SJeff Garzik 2497c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2498c6fd2807SJeff Garzik 2499c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2500c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2501c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2502c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2503c6fd2807SJeff Garzik 2504c6fd2807SJeff Garzik found = 1; 2505c6fd2807SJeff Garzik if (dev->dma_mode) 2506c6fd2807SJeff Garzik used_dma = 1; 2507c6fd2807SJeff Garzik } 2508c6fd2807SJeff Garzik if (!found) 2509c6fd2807SJeff Garzik goto out; 2510c6fd2807SJeff Garzik 2511c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2512c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2513c6fd2807SJeff Garzik dev = &ap->device[i]; 2514c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2515c6fd2807SJeff Garzik continue; 2516c6fd2807SJeff Garzik 2517c6fd2807SJeff Garzik if (!dev->pio_mode) { 2518c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2519c6fd2807SJeff Garzik rc = -EINVAL; 2520c6fd2807SJeff Garzik goto out; 2521c6fd2807SJeff Garzik } 2522c6fd2807SJeff Garzik 2523c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2524c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2525c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2526c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2527c6fd2807SJeff Garzik } 2528c6fd2807SJeff Garzik 2529c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2530c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2531c6fd2807SJeff Garzik dev = &ap->device[i]; 2532c6fd2807SJeff Garzik 2533c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2534c6fd2807SJeff Garzik continue; 2535c6fd2807SJeff Garzik 2536c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2537c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2538c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2539c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2540c6fd2807SJeff Garzik } 2541c6fd2807SJeff Garzik 2542c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2543c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2544c6fd2807SJeff Garzik dev = &ap->device[i]; 2545c6fd2807SJeff Garzik 254618d90debSAlan /* don't update suspended devices' xfer mode */ 2547c6fd2807SJeff Garzik if (!ata_dev_ready(dev)) 2548c6fd2807SJeff Garzik continue; 2549c6fd2807SJeff Garzik 2550c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2551c6fd2807SJeff Garzik if (rc) 2552c6fd2807SJeff Garzik goto out; 2553c6fd2807SJeff Garzik } 2554c6fd2807SJeff Garzik 2555c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2556c6fd2807SJeff Garzik * host channels are not permitted to do so. 2557c6fd2807SJeff Garzik */ 2558cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2559cca3974eSJeff Garzik ap->host->simplex_claimed = 1; 2560c6fd2807SJeff Garzik 2561c6fd2807SJeff Garzik /* step5: chip specific finalisation */ 2562c6fd2807SJeff Garzik if (ap->ops->post_set_mode) 2563c6fd2807SJeff Garzik ap->ops->post_set_mode(ap); 2564c6fd2807SJeff Garzik 2565c6fd2807SJeff Garzik out: 2566c6fd2807SJeff Garzik if (rc) 2567c6fd2807SJeff Garzik *r_failed_dev = dev; 2568c6fd2807SJeff Garzik return rc; 2569c6fd2807SJeff Garzik } 2570c6fd2807SJeff Garzik 2571c6fd2807SJeff Garzik /** 2572c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 2573c6fd2807SJeff Garzik * @ap: port to which command is being issued 2574c6fd2807SJeff Garzik * @tf: ATA taskfile register set 2575c6fd2807SJeff Garzik * 2576c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 2577c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 2578c6fd2807SJeff Garzik * other threads. 2579c6fd2807SJeff Garzik * 2580c6fd2807SJeff Garzik * LOCKING: 2581cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 2582c6fd2807SJeff Garzik */ 2583c6fd2807SJeff Garzik 2584c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 2585c6fd2807SJeff Garzik const struct ata_taskfile *tf) 2586c6fd2807SJeff Garzik { 2587c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 2588c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 2589c6fd2807SJeff Garzik } 2590c6fd2807SJeff Garzik 2591c6fd2807SJeff Garzik /** 2592c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 2593c6fd2807SJeff Garzik * @ap: port containing status register to be polled 2594c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 2595c6fd2807SJeff Garzik * @tmout: overall timeout 2596c6fd2807SJeff Garzik * 2597c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 2598c6fd2807SJeff Garzik * or a timeout occurs. 2599c6fd2807SJeff Garzik * 2600d1adc1bbSTejun Heo * LOCKING: 2601d1adc1bbSTejun Heo * Kernel thread context (may sleep). 2602d1adc1bbSTejun Heo * 2603d1adc1bbSTejun Heo * RETURNS: 2604d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 2605c6fd2807SJeff Garzik */ 2606d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 2607c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 2608c6fd2807SJeff Garzik { 2609c6fd2807SJeff Garzik unsigned long timer_start, timeout; 2610c6fd2807SJeff Garzik u8 status; 2611c6fd2807SJeff Garzik 2612c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 2613c6fd2807SJeff Garzik timer_start = jiffies; 2614c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 2615d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2616d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2617c6fd2807SJeff Garzik msleep(50); 2618c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 2619c6fd2807SJeff Garzik } 2620c6fd2807SJeff Garzik 2621d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 2622c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 262335aa7a43SJeff Garzik "port is slow to respond, please be patient " 262435aa7a43SJeff Garzik "(Status 0x%x)\n", status); 2625c6fd2807SJeff Garzik 2626c6fd2807SJeff Garzik timeout = timer_start + tmout; 2627d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2628d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2629c6fd2807SJeff Garzik msleep(50); 2630c6fd2807SJeff Garzik status = ata_chk_status(ap); 2631c6fd2807SJeff Garzik } 2632c6fd2807SJeff Garzik 2633d1adc1bbSTejun Heo if (status == 0xff) 2634d1adc1bbSTejun Heo return -ENODEV; 2635d1adc1bbSTejun Heo 2636c6fd2807SJeff Garzik if (status & ATA_BUSY) { 2637c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 263835aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 263935aa7a43SJeff Garzik tmout / HZ, status); 2640d1adc1bbSTejun Heo return -EBUSY; 2641c6fd2807SJeff Garzik } 2642c6fd2807SJeff Garzik 2643c6fd2807SJeff Garzik return 0; 2644c6fd2807SJeff Garzik } 2645c6fd2807SJeff Garzik 2646c6fd2807SJeff Garzik static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) 2647c6fd2807SJeff Garzik { 2648c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2649c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 2650c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 2651c6fd2807SJeff Garzik unsigned long timeout; 2652c6fd2807SJeff Garzik 2653c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 2654c6fd2807SJeff Garzik * BSY bit to clear 2655c6fd2807SJeff Garzik */ 2656c6fd2807SJeff Garzik if (dev0) 2657c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2658c6fd2807SJeff Garzik 2659c6fd2807SJeff Garzik /* if device 1 was found in ata_devchk, wait for 2660c6fd2807SJeff Garzik * register access, then wait for BSY to clear 2661c6fd2807SJeff Garzik */ 2662c6fd2807SJeff Garzik timeout = jiffies + ATA_TMOUT_BOOT; 2663c6fd2807SJeff Garzik while (dev1) { 2664c6fd2807SJeff Garzik u8 nsect, lbal; 2665c6fd2807SJeff Garzik 2666c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 26670d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 26680d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 2669c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 2670c6fd2807SJeff Garzik break; 2671c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) { 2672c6fd2807SJeff Garzik dev1 = 0; 2673c6fd2807SJeff Garzik break; 2674c6fd2807SJeff Garzik } 2675c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 2676c6fd2807SJeff Garzik } 2677c6fd2807SJeff Garzik if (dev1) 2678c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2679c6fd2807SJeff Garzik 2680c6fd2807SJeff Garzik /* is all this really necessary? */ 2681c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2682c6fd2807SJeff Garzik if (dev1) 2683c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2684c6fd2807SJeff Garzik if (dev0) 2685c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2686c6fd2807SJeff Garzik } 2687c6fd2807SJeff Garzik 2688c6fd2807SJeff Garzik static unsigned int ata_bus_softreset(struct ata_port *ap, 2689c6fd2807SJeff Garzik unsigned int devmask) 2690c6fd2807SJeff Garzik { 2691c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2692c6fd2807SJeff Garzik 269344877b4eSTejun Heo DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); 2694c6fd2807SJeff Garzik 2695c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 26960d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2697c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 26980d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 2699c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 27000d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2701c6fd2807SJeff Garzik 2702c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 2703c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 2704c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 2705c6fd2807SJeff Garzik * between when the ATA command register is written, and then 2706c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 2707c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 2708c6fd2807SJeff Garzik * delay here as well. 2709c6fd2807SJeff Garzik * 2710c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 2711c6fd2807SJeff Garzik */ 2712c6fd2807SJeff Garzik msleep(150); 2713c6fd2807SJeff Garzik 2714c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 2715c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 2716c6fd2807SJeff Garzik * pulldown resistor. 2717c6fd2807SJeff Garzik */ 2718d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 2719d1adc1bbSTejun Heo return 0; 2720c6fd2807SJeff Garzik 2721c6fd2807SJeff Garzik ata_bus_post_reset(ap, devmask); 2722c6fd2807SJeff Garzik 2723c6fd2807SJeff Garzik return 0; 2724c6fd2807SJeff Garzik } 2725c6fd2807SJeff Garzik 2726c6fd2807SJeff Garzik /** 2727c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 2728c6fd2807SJeff Garzik * @ap: port to reset 2729c6fd2807SJeff Garzik * 2730c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 2731c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 2732c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 2733c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 2734c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 2735c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 2736c6fd2807SJeff Garzik * the device is ATA or ATAPI. 2737c6fd2807SJeff Garzik * 2738c6fd2807SJeff Garzik * LOCKING: 2739c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2740cca3974eSJeff Garzik * Obtains host lock. 2741c6fd2807SJeff Garzik * 2742c6fd2807SJeff Garzik * SIDE EFFECTS: 2743c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 2744c6fd2807SJeff Garzik */ 2745c6fd2807SJeff Garzik 2746c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 2747c6fd2807SJeff Garzik { 2748c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2749c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 2750c6fd2807SJeff Garzik u8 err; 2751c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 2752c6fd2807SJeff Garzik 275344877b4eSTejun Heo DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); 2754c6fd2807SJeff Garzik 2755c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 2756c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 2757c6fd2807SJeff Garzik dev0 = 1; 2758c6fd2807SJeff Garzik else { 2759c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 2760c6fd2807SJeff Garzik if (slave_possible) 2761c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 2762c6fd2807SJeff Garzik } 2763c6fd2807SJeff Garzik 2764c6fd2807SJeff Garzik if (dev0) 2765c6fd2807SJeff Garzik devmask |= (1 << 0); 2766c6fd2807SJeff Garzik if (dev1) 2767c6fd2807SJeff Garzik devmask |= (1 << 1); 2768c6fd2807SJeff Garzik 2769c6fd2807SJeff Garzik /* select device 0 again */ 2770c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2771c6fd2807SJeff Garzik 2772c6fd2807SJeff Garzik /* issue bus reset */ 2773c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SRST) 2774c6fd2807SJeff Garzik if (ata_bus_softreset(ap, devmask)) 2775c6fd2807SJeff Garzik goto err_out; 2776c6fd2807SJeff Garzik 2777c6fd2807SJeff Garzik /* 2778c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 2779c6fd2807SJeff Garzik */ 2780c6fd2807SJeff Garzik ap->device[0].class = ata_dev_try_classify(ap, 0, &err); 2781c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 2782c6fd2807SJeff Garzik ap->device[1].class = ata_dev_try_classify(ap, 1, &err); 2783c6fd2807SJeff Garzik 2784c6fd2807SJeff Garzik /* re-enable interrupts */ 278583625006SAkira Iguchi ap->ops->irq_on(ap); 2786c6fd2807SJeff Garzik 2787c6fd2807SJeff Garzik /* is double-select really necessary? */ 2788c6fd2807SJeff Garzik if (ap->device[1].class != ATA_DEV_NONE) 2789c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2790c6fd2807SJeff Garzik if (ap->device[0].class != ATA_DEV_NONE) 2791c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2792c6fd2807SJeff Garzik 2793c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 2794c6fd2807SJeff Garzik if ((ap->device[0].class == ATA_DEV_NONE) && 2795c6fd2807SJeff Garzik (ap->device[1].class == ATA_DEV_NONE)) 2796c6fd2807SJeff Garzik goto err_out; 2797c6fd2807SJeff Garzik 2798c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 2799c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 28000d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2801c6fd2807SJeff Garzik } 2802c6fd2807SJeff Garzik 2803c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2804c6fd2807SJeff Garzik return; 2805c6fd2807SJeff Garzik 2806c6fd2807SJeff Garzik err_out: 2807c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 2808c6fd2807SJeff Garzik ap->ops->port_disable(ap); 2809c6fd2807SJeff Garzik 2810c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2811c6fd2807SJeff Garzik } 2812c6fd2807SJeff Garzik 2813c6fd2807SJeff Garzik /** 2814c6fd2807SJeff Garzik * sata_phy_debounce - debounce SATA phy status 2815c6fd2807SJeff Garzik * @ap: ATA port to debounce SATA phy status for 2816c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2817c6fd2807SJeff Garzik * 2818c6fd2807SJeff Garzik * Make sure SStatus of @ap reaches stable state, determined by 2819c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 2820c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 2821c6fd2807SJeff Garzik * beginning of the stable state. Because, after hot unplugging, 2822c6fd2807SJeff Garzik * DET gets stuck at 1 on some controllers, this functions waits 2823c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 2824c6fd2807SJeff Garzik * 2825c6fd2807SJeff Garzik * LOCKING: 2826c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2827c6fd2807SJeff Garzik * 2828c6fd2807SJeff Garzik * RETURNS: 2829c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2830c6fd2807SJeff Garzik */ 2831c6fd2807SJeff Garzik int sata_phy_debounce(struct ata_port *ap, const unsigned long *params) 2832c6fd2807SJeff Garzik { 2833c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 2834c6fd2807SJeff Garzik unsigned long duration = params[1] * HZ / 1000; 2835c6fd2807SJeff Garzik unsigned long timeout = jiffies + params[2] * HZ / 1000; 2836c6fd2807SJeff Garzik unsigned long last_jiffies; 2837c6fd2807SJeff Garzik u32 last, cur; 2838c6fd2807SJeff Garzik int rc; 2839c6fd2807SJeff Garzik 2840c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2841c6fd2807SJeff Garzik return rc; 2842c6fd2807SJeff Garzik cur &= 0xf; 2843c6fd2807SJeff Garzik 2844c6fd2807SJeff Garzik last = cur; 2845c6fd2807SJeff Garzik last_jiffies = jiffies; 2846c6fd2807SJeff Garzik 2847c6fd2807SJeff Garzik while (1) { 2848c6fd2807SJeff Garzik msleep(interval_msec); 2849c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2850c6fd2807SJeff Garzik return rc; 2851c6fd2807SJeff Garzik cur &= 0xf; 2852c6fd2807SJeff Garzik 2853c6fd2807SJeff Garzik /* DET stable? */ 2854c6fd2807SJeff Garzik if (cur == last) { 2855c6fd2807SJeff Garzik if (cur == 1 && time_before(jiffies, timeout)) 2856c6fd2807SJeff Garzik continue; 2857c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 2858c6fd2807SJeff Garzik return 0; 2859c6fd2807SJeff Garzik continue; 2860c6fd2807SJeff Garzik } 2861c6fd2807SJeff Garzik 2862c6fd2807SJeff Garzik /* unstable, start over */ 2863c6fd2807SJeff Garzik last = cur; 2864c6fd2807SJeff Garzik last_jiffies = jiffies; 2865c6fd2807SJeff Garzik 2866c6fd2807SJeff Garzik /* check timeout */ 2867c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) 2868c6fd2807SJeff Garzik return -EBUSY; 2869c6fd2807SJeff Garzik } 2870c6fd2807SJeff Garzik } 2871c6fd2807SJeff Garzik 2872c6fd2807SJeff Garzik /** 2873c6fd2807SJeff Garzik * sata_phy_resume - resume SATA phy 2874c6fd2807SJeff Garzik * @ap: ATA port to resume SATA phy for 2875c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2876c6fd2807SJeff Garzik * 2877c6fd2807SJeff Garzik * Resume SATA phy of @ap and debounce it. 2878c6fd2807SJeff Garzik * 2879c6fd2807SJeff Garzik * LOCKING: 2880c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2881c6fd2807SJeff Garzik * 2882c6fd2807SJeff Garzik * RETURNS: 2883c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2884c6fd2807SJeff Garzik */ 2885c6fd2807SJeff Garzik int sata_phy_resume(struct ata_port *ap, const unsigned long *params) 2886c6fd2807SJeff Garzik { 2887c6fd2807SJeff Garzik u32 scontrol; 2888c6fd2807SJeff Garzik int rc; 2889c6fd2807SJeff Garzik 2890c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2891c6fd2807SJeff Garzik return rc; 2892c6fd2807SJeff Garzik 2893c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 2894c6fd2807SJeff Garzik 2895c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2896c6fd2807SJeff Garzik return rc; 2897c6fd2807SJeff Garzik 2898c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 2899c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 2900c6fd2807SJeff Garzik */ 2901c6fd2807SJeff Garzik msleep(200); 2902c6fd2807SJeff Garzik 2903c6fd2807SJeff Garzik return sata_phy_debounce(ap, params); 2904c6fd2807SJeff Garzik } 2905c6fd2807SJeff Garzik 2906c6fd2807SJeff Garzik static void ata_wait_spinup(struct ata_port *ap) 2907c6fd2807SJeff Garzik { 2908c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2909c6fd2807SJeff Garzik unsigned long end, secs; 2910c6fd2807SJeff Garzik int rc; 2911c6fd2807SJeff Garzik 2912c6fd2807SJeff Garzik /* first, debounce phy if SATA */ 2913c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2914c6fd2807SJeff Garzik rc = sata_phy_debounce(ap, sata_deb_timing_hotplug); 2915c6fd2807SJeff Garzik 2916c6fd2807SJeff Garzik /* if debounced successfully and offline, no need to wait */ 2917c6fd2807SJeff Garzik if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap)) 2918c6fd2807SJeff Garzik return; 2919c6fd2807SJeff Garzik } 2920c6fd2807SJeff Garzik 2921c6fd2807SJeff Garzik /* okay, let's give the drive time to spin up */ 2922c6fd2807SJeff Garzik end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000; 2923c6fd2807SJeff Garzik secs = ((end - jiffies) + HZ - 1) / HZ; 2924c6fd2807SJeff Garzik 2925c6fd2807SJeff Garzik if (time_after(jiffies, end)) 2926c6fd2807SJeff Garzik return; 2927c6fd2807SJeff Garzik 2928c6fd2807SJeff Garzik if (secs > 5) 2929c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "waiting for device to spin up " 2930c6fd2807SJeff Garzik "(%lu secs)\n", secs); 2931c6fd2807SJeff Garzik 2932c6fd2807SJeff Garzik schedule_timeout_uninterruptible(end - jiffies); 2933c6fd2807SJeff Garzik } 2934c6fd2807SJeff Garzik 2935c6fd2807SJeff Garzik /** 2936c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 2937c6fd2807SJeff Garzik * @ap: ATA port to be reset 2938c6fd2807SJeff Garzik * 2939c6fd2807SJeff Garzik * @ap is about to be reset. Initialize it. 2940c6fd2807SJeff Garzik * 2941c6fd2807SJeff Garzik * LOCKING: 2942c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2943c6fd2807SJeff Garzik * 2944c6fd2807SJeff Garzik * RETURNS: 2945c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2946c6fd2807SJeff Garzik */ 2947c6fd2807SJeff Garzik int ata_std_prereset(struct ata_port *ap) 2948c6fd2807SJeff Garzik { 2949c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2950c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 2951c6fd2807SJeff Garzik int rc; 2952c6fd2807SJeff Garzik 2953c6fd2807SJeff Garzik /* handle link resume & hotplug spinup */ 2954c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 2955c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_HRST_TO_RESUME)) 2956c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 2957c6fd2807SJeff Garzik 2958c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) && 2959c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_SKIP_D2H_BSY)) 2960c6fd2807SJeff Garzik ata_wait_spinup(ap); 2961c6fd2807SJeff Garzik 2962c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 2963c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 2964c6fd2807SJeff Garzik return 0; 2965c6fd2807SJeff Garzik 2966c6fd2807SJeff Garzik /* if SATA, resume phy */ 2967c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2968c6fd2807SJeff Garzik rc = sata_phy_resume(ap, timing); 2969c6fd2807SJeff Garzik if (rc && rc != -EOPNOTSUPP) { 2970c6fd2807SJeff Garzik /* phy resume failed */ 2971c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "failed to resume " 2972c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 2973c6fd2807SJeff Garzik return rc; 2974c6fd2807SJeff Garzik } 2975c6fd2807SJeff Garzik } 2976c6fd2807SJeff Garzik 2977c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 2978c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 2979c6fd2807SJeff Garzik */ 2980c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) 2981c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2982c6fd2807SJeff Garzik 2983c6fd2807SJeff Garzik return 0; 2984c6fd2807SJeff Garzik } 2985c6fd2807SJeff Garzik 2986c6fd2807SJeff Garzik /** 2987c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 2988c6fd2807SJeff Garzik * @ap: port to reset 2989c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 2990c6fd2807SJeff Garzik * 2991c6fd2807SJeff Garzik * Reset host port using ATA SRST. 2992c6fd2807SJeff Garzik * 2993c6fd2807SJeff Garzik * LOCKING: 2994c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2995c6fd2807SJeff Garzik * 2996c6fd2807SJeff Garzik * RETURNS: 2997c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2998c6fd2807SJeff Garzik */ 2999c6fd2807SJeff Garzik int ata_std_softreset(struct ata_port *ap, unsigned int *classes) 3000c6fd2807SJeff Garzik { 3001c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3002c6fd2807SJeff Garzik unsigned int devmask = 0, err_mask; 3003c6fd2807SJeff Garzik u8 err; 3004c6fd2807SJeff Garzik 3005c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3006c6fd2807SJeff Garzik 3007c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3008c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 3009c6fd2807SJeff Garzik goto out; 3010c6fd2807SJeff Garzik } 3011c6fd2807SJeff Garzik 3012c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3013c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 3014c6fd2807SJeff Garzik devmask |= (1 << 0); 3015c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 3016c6fd2807SJeff Garzik devmask |= (1 << 1); 3017c6fd2807SJeff Garzik 3018c6fd2807SJeff Garzik /* select device 0 again */ 3019c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3020c6fd2807SJeff Garzik 3021c6fd2807SJeff Garzik /* issue bus reset */ 3022c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 3023c6fd2807SJeff Garzik err_mask = ata_bus_softreset(ap, devmask); 3024c6fd2807SJeff Garzik if (err_mask) { 3025c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", 3026c6fd2807SJeff Garzik err_mask); 3027c6fd2807SJeff Garzik return -EIO; 3028c6fd2807SJeff Garzik } 3029c6fd2807SJeff Garzik 3030c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 3031c6fd2807SJeff Garzik classes[0] = ata_dev_try_classify(ap, 0, &err); 3032c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 3033c6fd2807SJeff Garzik classes[1] = ata_dev_try_classify(ap, 1, &err); 3034c6fd2807SJeff Garzik 3035c6fd2807SJeff Garzik out: 3036c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 3037c6fd2807SJeff Garzik return 0; 3038c6fd2807SJeff Garzik } 3039c6fd2807SJeff Garzik 3040c6fd2807SJeff Garzik /** 3041b6103f6dSTejun Heo * sata_port_hardreset - reset port via SATA phy reset 3042c6fd2807SJeff Garzik * @ap: port to reset 3043b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3044c6fd2807SJeff Garzik * 3045c6fd2807SJeff Garzik * SATA phy-reset host port using DET bits of SControl register. 3046c6fd2807SJeff Garzik * 3047c6fd2807SJeff Garzik * LOCKING: 3048c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3049c6fd2807SJeff Garzik * 3050c6fd2807SJeff Garzik * RETURNS: 3051c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3052c6fd2807SJeff Garzik */ 3053b6103f6dSTejun Heo int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing) 3054c6fd2807SJeff Garzik { 3055c6fd2807SJeff Garzik u32 scontrol; 3056c6fd2807SJeff Garzik int rc; 3057c6fd2807SJeff Garzik 3058c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3059c6fd2807SJeff Garzik 3060c6fd2807SJeff Garzik if (sata_set_spd_needed(ap)) { 3061c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3062c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3063c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3064c6fd2807SJeff Garzik * and Sil3124. 3065c6fd2807SJeff Garzik */ 3066c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3067b6103f6dSTejun Heo goto out; 3068c6fd2807SJeff Garzik 3069cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3070c6fd2807SJeff Garzik 3071c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3072b6103f6dSTejun Heo goto out; 3073c6fd2807SJeff Garzik 3074c6fd2807SJeff Garzik sata_set_spd(ap); 3075c6fd2807SJeff Garzik } 3076c6fd2807SJeff Garzik 3077c6fd2807SJeff Garzik /* issue phy wake/reset */ 3078c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3079b6103f6dSTejun Heo goto out; 3080c6fd2807SJeff Garzik 3081c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3082c6fd2807SJeff Garzik 3083c6fd2807SJeff Garzik if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) 3084b6103f6dSTejun Heo goto out; 3085c6fd2807SJeff Garzik 3086c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3087c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3088c6fd2807SJeff Garzik */ 3089c6fd2807SJeff Garzik msleep(1); 3090c6fd2807SJeff Garzik 3091c6fd2807SJeff Garzik /* bring phy back */ 3092b6103f6dSTejun Heo rc = sata_phy_resume(ap, timing); 3093b6103f6dSTejun Heo out: 3094b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3095b6103f6dSTejun Heo return rc; 3096b6103f6dSTejun Heo } 3097b6103f6dSTejun Heo 3098b6103f6dSTejun Heo /** 3099b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 3100b6103f6dSTejun Heo * @ap: port to reset 3101b6103f6dSTejun Heo * @class: resulting class of attached device 3102b6103f6dSTejun Heo * 3103b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 3104b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 3105b6103f6dSTejun Heo * 3106b6103f6dSTejun Heo * LOCKING: 3107b6103f6dSTejun Heo * Kernel thread context (may sleep) 3108b6103f6dSTejun Heo * 3109b6103f6dSTejun Heo * RETURNS: 3110b6103f6dSTejun Heo * 0 on success, -errno otherwise. 3111b6103f6dSTejun Heo */ 3112b6103f6dSTejun Heo int sata_std_hardreset(struct ata_port *ap, unsigned int *class) 3113b6103f6dSTejun Heo { 3114b6103f6dSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); 3115b6103f6dSTejun Heo int rc; 3116b6103f6dSTejun Heo 3117b6103f6dSTejun Heo DPRINTK("ENTER\n"); 3118b6103f6dSTejun Heo 3119b6103f6dSTejun Heo /* do hardreset */ 3120b6103f6dSTejun Heo rc = sata_port_hardreset(ap, timing); 3121b6103f6dSTejun Heo if (rc) { 3122b6103f6dSTejun Heo ata_port_printk(ap, KERN_ERR, 3123b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 3124b6103f6dSTejun Heo return rc; 3125b6103f6dSTejun Heo } 3126c6fd2807SJeff Garzik 3127c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 3128c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3129c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 3130c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 3131c6fd2807SJeff Garzik return 0; 3132c6fd2807SJeff Garzik } 3133c6fd2807SJeff Garzik 313434fee227STejun Heo /* wait a while before checking status, see SRST for more info */ 313534fee227STejun Heo msleep(150); 313634fee227STejun Heo 3137c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 3138c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, 3139c6fd2807SJeff Garzik "COMRESET failed (device not ready)\n"); 3140c6fd2807SJeff Garzik return -EIO; 3141c6fd2807SJeff Garzik } 3142c6fd2807SJeff Garzik 3143c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 3144c6fd2807SJeff Garzik 3145c6fd2807SJeff Garzik *class = ata_dev_try_classify(ap, 0, NULL); 3146c6fd2807SJeff Garzik 3147c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 3148c6fd2807SJeff Garzik return 0; 3149c6fd2807SJeff Garzik } 3150c6fd2807SJeff Garzik 3151c6fd2807SJeff Garzik /** 3152c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 3153c6fd2807SJeff Garzik * @ap: the target ata_port 3154c6fd2807SJeff Garzik * @classes: classes of attached devices 3155c6fd2807SJeff Garzik * 3156c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3157c6fd2807SJeff Garzik * the device might have been reset more than once using 3158c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3159c6fd2807SJeff Garzik * 3160c6fd2807SJeff Garzik * LOCKING: 3161c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3162c6fd2807SJeff Garzik */ 3163c6fd2807SJeff Garzik void ata_std_postreset(struct ata_port *ap, unsigned int *classes) 3164c6fd2807SJeff Garzik { 3165c6fd2807SJeff Garzik u32 serror; 3166c6fd2807SJeff Garzik 3167c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3168c6fd2807SJeff Garzik 3169c6fd2807SJeff Garzik /* print link status */ 3170c6fd2807SJeff Garzik sata_print_link_status(ap); 3171c6fd2807SJeff Garzik 3172c6fd2807SJeff Garzik /* clear SError */ 3173c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) 3174c6fd2807SJeff Garzik sata_scr_write(ap, SCR_ERROR, serror); 3175c6fd2807SJeff Garzik 3176c6fd2807SJeff Garzik /* re-enable interrupts */ 317783625006SAkira Iguchi if (!ap->ops->error_handler) 317883625006SAkira Iguchi ap->ops->irq_on(ap); 3179c6fd2807SJeff Garzik 3180c6fd2807SJeff Garzik /* is double-select really necessary? */ 3181c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 3182c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3183c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3184c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3185c6fd2807SJeff Garzik 3186c6fd2807SJeff Garzik /* bail out if no device is present */ 3187c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3188c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3189c6fd2807SJeff Garzik return; 3190c6fd2807SJeff Garzik } 3191c6fd2807SJeff Garzik 3192c6fd2807SJeff Garzik /* set up device control */ 31930d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 31940d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 3195c6fd2807SJeff Garzik 3196c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3197c6fd2807SJeff Garzik } 3198c6fd2807SJeff Garzik 3199c6fd2807SJeff Garzik /** 3200c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3201c6fd2807SJeff Garzik * @dev: device to compare against 3202c6fd2807SJeff Garzik * @new_class: class of the new device 3203c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3204c6fd2807SJeff Garzik * 3205c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3206c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3207c6fd2807SJeff Garzik * @new_id. 3208c6fd2807SJeff Garzik * 3209c6fd2807SJeff Garzik * LOCKING: 3210c6fd2807SJeff Garzik * None. 3211c6fd2807SJeff Garzik * 3212c6fd2807SJeff Garzik * RETURNS: 3213c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3214c6fd2807SJeff Garzik */ 3215c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3216c6fd2807SJeff Garzik const u16 *new_id) 3217c6fd2807SJeff Garzik { 3218c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3219a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3220a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3221c6fd2807SJeff Garzik u64 new_n_sectors; 3222c6fd2807SJeff Garzik 3223c6fd2807SJeff Garzik if (dev->class != new_class) { 3224c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3225c6fd2807SJeff Garzik dev->class, new_class); 3226c6fd2807SJeff Garzik return 0; 3227c6fd2807SJeff Garzik } 3228c6fd2807SJeff Garzik 3229a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3230a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3231a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3232a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3233c6fd2807SJeff Garzik new_n_sectors = ata_id_n_sectors(new_id); 3234c6fd2807SJeff Garzik 3235c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3236c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3237c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3238c6fd2807SJeff Garzik return 0; 3239c6fd2807SJeff Garzik } 3240c6fd2807SJeff Garzik 3241c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3242c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3243c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3244c6fd2807SJeff Garzik return 0; 3245c6fd2807SJeff Garzik } 3246c6fd2807SJeff Garzik 3247c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { 3248c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 3249c6fd2807SJeff Garzik "%llu != %llu\n", 3250c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 3251c6fd2807SJeff Garzik (unsigned long long)new_n_sectors); 3252c6fd2807SJeff Garzik return 0; 3253c6fd2807SJeff Garzik } 3254c6fd2807SJeff Garzik 3255c6fd2807SJeff Garzik return 1; 3256c6fd2807SJeff Garzik } 3257c6fd2807SJeff Garzik 3258c6fd2807SJeff Garzik /** 3259c6fd2807SJeff Garzik * ata_dev_revalidate - Revalidate ATA device 3260c6fd2807SJeff Garzik * @dev: device to revalidate 3261bff04647STejun Heo * @readid_flags: read ID flags 3262c6fd2807SJeff Garzik * 3263c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3264c6fd2807SJeff Garzik * the port. 3265c6fd2807SJeff Garzik * 3266c6fd2807SJeff Garzik * LOCKING: 3267c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3268c6fd2807SJeff Garzik * 3269c6fd2807SJeff Garzik * RETURNS: 3270c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3271c6fd2807SJeff Garzik */ 3272bff04647STejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) 3273c6fd2807SJeff Garzik { 3274c6fd2807SJeff Garzik unsigned int class = dev->class; 3275c6fd2807SJeff Garzik u16 *id = (void *)dev->ap->sector_buf; 3276c6fd2807SJeff Garzik int rc; 3277c6fd2807SJeff Garzik 3278c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) { 3279c6fd2807SJeff Garzik rc = -ENODEV; 3280c6fd2807SJeff Garzik goto fail; 3281c6fd2807SJeff Garzik } 3282c6fd2807SJeff Garzik 3283c6fd2807SJeff Garzik /* read ID data */ 3284bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3285c6fd2807SJeff Garzik if (rc) 3286c6fd2807SJeff Garzik goto fail; 3287c6fd2807SJeff Garzik 3288c6fd2807SJeff Garzik /* is the device still there? */ 3289c6fd2807SJeff Garzik if (!ata_dev_same_device(dev, class, id)) { 3290c6fd2807SJeff Garzik rc = -ENODEV; 3291c6fd2807SJeff Garzik goto fail; 3292c6fd2807SJeff Garzik } 3293c6fd2807SJeff Garzik 3294c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3295c6fd2807SJeff Garzik 3296c6fd2807SJeff Garzik /* configure device according to the new ID */ 3297efdaedc4STejun Heo rc = ata_dev_configure(dev); 3298c6fd2807SJeff Garzik if (rc == 0) 3299c6fd2807SJeff Garzik return 0; 3300c6fd2807SJeff Garzik 3301c6fd2807SJeff Garzik fail: 3302c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3303c6fd2807SJeff Garzik return rc; 3304c6fd2807SJeff Garzik } 3305c6fd2807SJeff Garzik 33066919a0a6SAlan Cox struct ata_blacklist_entry { 33076919a0a6SAlan Cox const char *model_num; 33086919a0a6SAlan Cox const char *model_rev; 33096919a0a6SAlan Cox unsigned long horkage; 33106919a0a6SAlan Cox }; 33116919a0a6SAlan Cox 33126919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 33136919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 33146919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 33156919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 33166919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 33176919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 33186919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 33196919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 33206919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 33216919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 33226919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 33236919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 33246919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 33256919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 33266919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 33276919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 33286919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 33296919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 33306919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 33316919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 33326919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 33336919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 33346919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 33356919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 33366919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 33376919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 33386919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 33396919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 33406919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 33416919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 33426919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 33436919a0a6SAlan Cox 33446919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 33456919a0a6SAlan Cox 33466919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 33476919a0a6SAlan Cox /* NCQ is slow */ 33486919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 33496919a0a6SAlan Cox 33506919a0a6SAlan Cox /* Devices with NCQ limits */ 33516919a0a6SAlan Cox 33526919a0a6SAlan Cox /* End Marker */ 33536919a0a6SAlan Cox { } 3354c6fd2807SJeff Garzik }; 3355c6fd2807SJeff Garzik 33566919a0a6SAlan Cox unsigned long ata_device_blacklisted(const struct ata_device *dev) 3357c6fd2807SJeff Garzik { 33588bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 33598bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 33606919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 3361c6fd2807SJeff Garzik 33628bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 33638bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 3364c6fd2807SJeff Garzik 33656919a0a6SAlan Cox while (ad->model_num) { 33668bfa79fcSTejun Heo if (!strcmp(ad->model_num, model_num)) { 33676919a0a6SAlan Cox if (ad->model_rev == NULL) 33686919a0a6SAlan Cox return ad->horkage; 33698bfa79fcSTejun Heo if (!strcmp(ad->model_rev, model_rev)) 33706919a0a6SAlan Cox return ad->horkage; 3371c6fd2807SJeff Garzik } 33726919a0a6SAlan Cox ad++; 3373c6fd2807SJeff Garzik } 3374c6fd2807SJeff Garzik return 0; 3375c6fd2807SJeff Garzik } 3376c6fd2807SJeff Garzik 33776919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 33786919a0a6SAlan Cox { 33796919a0a6SAlan Cox /* We don't support polling DMA. 33806919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 33816919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 33826919a0a6SAlan Cox */ 33836919a0a6SAlan Cox if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && 33846919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 33856919a0a6SAlan Cox return 1; 33866919a0a6SAlan Cox return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; 33876919a0a6SAlan Cox } 33886919a0a6SAlan Cox 3389c6fd2807SJeff Garzik /** 3390c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 3391c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 3392c6fd2807SJeff Garzik * 3393c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 3394c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 3395c6fd2807SJeff Garzik * known limits including host controller limits, device 3396c6fd2807SJeff Garzik * blacklist, etc... 3397c6fd2807SJeff Garzik * 3398c6fd2807SJeff Garzik * LOCKING: 3399c6fd2807SJeff Garzik * None. 3400c6fd2807SJeff Garzik */ 3401c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 3402c6fd2807SJeff Garzik { 3403c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 3404cca3974eSJeff Garzik struct ata_host *host = ap->host; 3405c6fd2807SJeff Garzik unsigned long xfer_mask; 3406c6fd2807SJeff Garzik 3407c6fd2807SJeff Garzik /* controller modes available */ 3408c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 3409c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 3410c6fd2807SJeff Garzik 3411c6fd2807SJeff Garzik /* Apply cable rule here. Don't apply it early because when 3412c6fd2807SJeff Garzik * we handle hot plug the cable type can itself change. 3413c6fd2807SJeff Garzik */ 3414c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_PATA40) 3415c6fd2807SJeff Garzik xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3416fc085150SAlan Cox /* Apply drive side cable rule. Unknown or 80 pin cables reported 3417fc085150SAlan Cox * host side are checked drive side as well. Cases where we know a 3418fc085150SAlan Cox * 40wire cable is used safely for 80 are not checked here. 3419fc085150SAlan Cox */ 3420fc085150SAlan Cox if (ata_drive_40wire(dev->id) && (ap->cbl == ATA_CBL_PATA_UNK || ap->cbl == ATA_CBL_PATA80)) 3421fc085150SAlan Cox xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3422fc085150SAlan Cox 3423c6fd2807SJeff Garzik 3424c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 3425c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 3426c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 3427c6fd2807SJeff Garzik 3428b352e57dSAlan Cox /* 3429b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 3430b352e57dSAlan Cox * cable 3431b352e57dSAlan Cox */ 3432b352e57dSAlan Cox if (ata_dev_pair(dev)) { 3433b352e57dSAlan Cox /* No PIO5 or PIO6 */ 3434b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 3435b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 3436b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 3437b352e57dSAlan Cox } 3438b352e57dSAlan Cox 3439c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 3440c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3441c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 3442c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 3443c6fd2807SJeff Garzik } 3444c6fd2807SJeff Garzik 3445cca3974eSJeff Garzik if ((host->flags & ATA_HOST_SIMPLEX) && host->simplex_claimed) { 3446c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3447c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 3448c6fd2807SJeff Garzik "other device, disabling DMA\n"); 3449c6fd2807SJeff Garzik } 3450c6fd2807SJeff Garzik 3451c6fd2807SJeff Garzik if (ap->ops->mode_filter) 3452c6fd2807SJeff Garzik xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); 3453c6fd2807SJeff Garzik 3454c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 3455c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 3456c6fd2807SJeff Garzik } 3457c6fd2807SJeff Garzik 3458c6fd2807SJeff Garzik /** 3459c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 3460c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3461c6fd2807SJeff Garzik * 3462c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 3463c6fd2807SJeff Garzik * on port @ap. 3464c6fd2807SJeff Garzik * 3465c6fd2807SJeff Garzik * LOCKING: 3466c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3467c6fd2807SJeff Garzik * 3468c6fd2807SJeff Garzik * RETURNS: 3469c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3470c6fd2807SJeff Garzik */ 3471c6fd2807SJeff Garzik 3472c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 3473c6fd2807SJeff Garzik { 3474c6fd2807SJeff Garzik struct ata_taskfile tf; 3475c6fd2807SJeff Garzik unsigned int err_mask; 3476c6fd2807SJeff Garzik 3477c6fd2807SJeff Garzik /* set up set-features taskfile */ 3478c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 3479c6fd2807SJeff Garzik 3480c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3481c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 3482c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 3483c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3484c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3485c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 3486c6fd2807SJeff Garzik 3487c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3488c6fd2807SJeff Garzik 3489c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3490c6fd2807SJeff Garzik return err_mask; 3491c6fd2807SJeff Garzik } 3492c6fd2807SJeff Garzik 3493c6fd2807SJeff Garzik /** 3494c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 3495c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3496c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 3497c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 3498c6fd2807SJeff Garzik * 3499c6fd2807SJeff Garzik * LOCKING: 3500c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3501c6fd2807SJeff Garzik * 3502c6fd2807SJeff Garzik * RETURNS: 3503c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3504c6fd2807SJeff Garzik */ 3505c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 3506c6fd2807SJeff Garzik u16 heads, u16 sectors) 3507c6fd2807SJeff Garzik { 3508c6fd2807SJeff Garzik struct ata_taskfile tf; 3509c6fd2807SJeff Garzik unsigned int err_mask; 3510c6fd2807SJeff Garzik 3511c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 3512c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 3513c6fd2807SJeff Garzik return AC_ERR_INVALID; 3514c6fd2807SJeff Garzik 3515c6fd2807SJeff Garzik /* set up init dev params taskfile */ 3516c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 3517c6fd2807SJeff Garzik 3518c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3519c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 3520c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3521c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3522c6fd2807SJeff Garzik tf.nsect = sectors; 3523c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 3524c6fd2807SJeff Garzik 3525c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3526c6fd2807SJeff Garzik 3527c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3528c6fd2807SJeff Garzik return err_mask; 3529c6fd2807SJeff Garzik } 3530c6fd2807SJeff Garzik 3531c6fd2807SJeff Garzik /** 3532c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 3533c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 3534c6fd2807SJeff Garzik * 3535c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 3536c6fd2807SJeff Garzik * 3537c6fd2807SJeff Garzik * LOCKING: 3538cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3539c6fd2807SJeff Garzik */ 354070e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 3541c6fd2807SJeff Garzik { 3542c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3543c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3544c6fd2807SJeff Garzik int dir = qc->dma_dir; 3545c6fd2807SJeff Garzik void *pad_buf = NULL; 3546c6fd2807SJeff Garzik 3547c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 3548c6fd2807SJeff Garzik WARN_ON(sg == NULL); 3549c6fd2807SJeff Garzik 3550c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 3551c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 3552c6fd2807SJeff Garzik 3553c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 3554c6fd2807SJeff Garzik 3555c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 3556c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 3557c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 3558c6fd2807SJeff Garzik */ 3559c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 3560c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3561c6fd2807SJeff Garzik 3562c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 3563c6fd2807SJeff Garzik if (qc->n_elem) 3564c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 3565c6fd2807SJeff Garzik /* restore last sg */ 3566c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 3567c6fd2807SJeff Garzik if (pad_buf) { 3568c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3569c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3570c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 3571c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3572c6fd2807SJeff Garzik } 3573c6fd2807SJeff Garzik } else { 3574c6fd2807SJeff Garzik if (qc->n_elem) 3575c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 3576c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 3577c6fd2807SJeff Garzik dir); 3578c6fd2807SJeff Garzik /* restore sg */ 3579c6fd2807SJeff Garzik sg->length += qc->pad_len; 3580c6fd2807SJeff Garzik if (pad_buf) 3581c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 3582c6fd2807SJeff Garzik pad_buf, qc->pad_len); 3583c6fd2807SJeff Garzik } 3584c6fd2807SJeff Garzik 3585c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 3586c6fd2807SJeff Garzik qc->__sg = NULL; 3587c6fd2807SJeff Garzik } 3588c6fd2807SJeff Garzik 3589c6fd2807SJeff Garzik /** 3590c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 3591c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 3592c6fd2807SJeff Garzik * 3593c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 3594c6fd2807SJeff Garzik * associated with the current disk command. 3595c6fd2807SJeff Garzik * 3596c6fd2807SJeff Garzik * LOCKING: 3597cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3598c6fd2807SJeff Garzik * 3599c6fd2807SJeff Garzik */ 3600c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 3601c6fd2807SJeff Garzik { 3602c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3603c6fd2807SJeff Garzik struct scatterlist *sg; 3604c6fd2807SJeff Garzik unsigned int idx; 3605c6fd2807SJeff Garzik 3606c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 3607c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 3608c6fd2807SJeff Garzik 3609c6fd2807SJeff Garzik idx = 0; 3610c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 3611c6fd2807SJeff Garzik u32 addr, offset; 3612c6fd2807SJeff Garzik u32 sg_len, len; 3613c6fd2807SJeff Garzik 3614c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 3615c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 3616c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 3617c6fd2807SJeff Garzik */ 3618c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 3619c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 3620c6fd2807SJeff Garzik 3621c6fd2807SJeff Garzik while (sg_len) { 3622c6fd2807SJeff Garzik offset = addr & 0xffff; 3623c6fd2807SJeff Garzik len = sg_len; 3624c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 3625c6fd2807SJeff Garzik len = 0x10000 - offset; 3626c6fd2807SJeff Garzik 3627c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 3628c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 3629c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 3630c6fd2807SJeff Garzik 3631c6fd2807SJeff Garzik idx++; 3632c6fd2807SJeff Garzik sg_len -= len; 3633c6fd2807SJeff Garzik addr += len; 3634c6fd2807SJeff Garzik } 3635c6fd2807SJeff Garzik } 3636c6fd2807SJeff Garzik 3637c6fd2807SJeff Garzik if (idx) 3638c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 3639c6fd2807SJeff Garzik } 3640c6fd2807SJeff Garzik /** 3641c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 3642c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 3643c6fd2807SJeff Garzik * 3644c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 3645c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 3646c6fd2807SJeff Garzik * supplied PACKET command. 3647c6fd2807SJeff Garzik * 3648c6fd2807SJeff Garzik * LOCKING: 3649cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3650c6fd2807SJeff Garzik * 3651c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 3652c6fd2807SJeff Garzik * nonzero otherwise 3653c6fd2807SJeff Garzik */ 3654c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 3655c6fd2807SJeff Garzik { 3656c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3657c6fd2807SJeff Garzik int rc = 0; /* Assume ATAPI DMA is OK by default */ 3658c6fd2807SJeff Garzik 3659c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 3660c6fd2807SJeff Garzik rc = ap->ops->check_atapi_dma(qc); 3661c6fd2807SJeff Garzik 3662c6fd2807SJeff Garzik return rc; 3663c6fd2807SJeff Garzik } 3664c6fd2807SJeff Garzik /** 3665c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 3666c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 3667c6fd2807SJeff Garzik * 3668c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 3669c6fd2807SJeff Garzik * 3670c6fd2807SJeff Garzik * LOCKING: 3671cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3672c6fd2807SJeff Garzik */ 3673c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 3674c6fd2807SJeff Garzik { 3675c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 3676c6fd2807SJeff Garzik return; 3677c6fd2807SJeff Garzik 3678c6fd2807SJeff Garzik ata_fill_sg(qc); 3679c6fd2807SJeff Garzik } 3680c6fd2807SJeff Garzik 3681c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 3682c6fd2807SJeff Garzik 3683c6fd2807SJeff Garzik /** 3684c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 3685c6fd2807SJeff Garzik * @qc: Command to be associated 3686c6fd2807SJeff Garzik * @buf: Memory buffer 3687c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 3688c6fd2807SJeff Garzik * 3689c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3690c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 3691c6fd2807SJeff Garzik * 3692c6fd2807SJeff Garzik * LOCKING: 3693cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3694c6fd2807SJeff Garzik */ 3695c6fd2807SJeff Garzik 3696c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 3697c6fd2807SJeff Garzik { 3698c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 3699c6fd2807SJeff Garzik 3700c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 3701c6fd2807SJeff Garzik qc->n_elem = 1; 3702c6fd2807SJeff Garzik qc->orig_n_elem = 1; 3703c6fd2807SJeff Garzik qc->buf_virt = buf; 3704c6fd2807SJeff Garzik qc->nbytes = buflen; 3705c6fd2807SJeff Garzik 370661c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 3707c6fd2807SJeff Garzik } 3708c6fd2807SJeff Garzik 3709c6fd2807SJeff Garzik /** 3710c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 3711c6fd2807SJeff Garzik * @qc: Command to be associated 3712c6fd2807SJeff Garzik * @sg: Scatter-gather table. 3713c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 3714c6fd2807SJeff Garzik * 3715c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3716c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 3717c6fd2807SJeff Garzik * elements. 3718c6fd2807SJeff Garzik * 3719c6fd2807SJeff Garzik * LOCKING: 3720cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3721c6fd2807SJeff Garzik */ 3722c6fd2807SJeff Garzik 3723c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 3724c6fd2807SJeff Garzik unsigned int n_elem) 3725c6fd2807SJeff Garzik { 3726c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 3727c6fd2807SJeff Garzik qc->__sg = sg; 3728c6fd2807SJeff Garzik qc->n_elem = n_elem; 3729c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 3730c6fd2807SJeff Garzik } 3731c6fd2807SJeff Garzik 3732c6fd2807SJeff Garzik /** 3733c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 3734c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 3735c6fd2807SJeff Garzik * 3736c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 3737c6fd2807SJeff Garzik * 3738c6fd2807SJeff Garzik * LOCKING: 3739cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3740c6fd2807SJeff Garzik * 3741c6fd2807SJeff Garzik * RETURNS: 3742c6fd2807SJeff Garzik * Zero on success, negative on error. 3743c6fd2807SJeff Garzik */ 3744c6fd2807SJeff Garzik 3745c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 3746c6fd2807SJeff Garzik { 3747c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3748c6fd2807SJeff Garzik int dir = qc->dma_dir; 3749c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3750c6fd2807SJeff Garzik dma_addr_t dma_address; 3751c6fd2807SJeff Garzik int trim_sg = 0; 3752c6fd2807SJeff Garzik 3753c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3754c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 3755c6fd2807SJeff Garzik if (qc->pad_len) { 3756c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3757c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3758c6fd2807SJeff Garzik 3759c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3760c6fd2807SJeff Garzik 3761c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3762c6fd2807SJeff Garzik 3763c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 3764c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 3765c6fd2807SJeff Garzik qc->pad_len); 3766c6fd2807SJeff Garzik 3767c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3768c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3769c6fd2807SJeff Garzik /* trim sg */ 3770c6fd2807SJeff Garzik sg->length -= qc->pad_len; 3771c6fd2807SJeff Garzik if (sg->length == 0) 3772c6fd2807SJeff Garzik trim_sg = 1; 3773c6fd2807SJeff Garzik 3774c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 3775c6fd2807SJeff Garzik sg->length, qc->pad_len); 3776c6fd2807SJeff Garzik } 3777c6fd2807SJeff Garzik 3778c6fd2807SJeff Garzik if (trim_sg) { 3779c6fd2807SJeff Garzik qc->n_elem--; 3780c6fd2807SJeff Garzik goto skip_map; 3781c6fd2807SJeff Garzik } 3782c6fd2807SJeff Garzik 3783c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 3784c6fd2807SJeff Garzik sg->length, dir); 3785c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 3786c6fd2807SJeff Garzik /* restore sg */ 3787c6fd2807SJeff Garzik sg->length += qc->pad_len; 3788c6fd2807SJeff Garzik return -1; 3789c6fd2807SJeff Garzik } 3790c6fd2807SJeff Garzik 3791c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 3792c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 3793c6fd2807SJeff Garzik 3794c6fd2807SJeff Garzik skip_map: 3795c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 3796c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 3797c6fd2807SJeff Garzik 3798c6fd2807SJeff Garzik return 0; 3799c6fd2807SJeff Garzik } 3800c6fd2807SJeff Garzik 3801c6fd2807SJeff Garzik /** 3802c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 3803c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 3804c6fd2807SJeff Garzik * 3805c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 3806c6fd2807SJeff Garzik * 3807c6fd2807SJeff Garzik * LOCKING: 3808cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3809c6fd2807SJeff Garzik * 3810c6fd2807SJeff Garzik * RETURNS: 3811c6fd2807SJeff Garzik * Zero on success, negative on error. 3812c6fd2807SJeff Garzik * 3813c6fd2807SJeff Garzik */ 3814c6fd2807SJeff Garzik 3815c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 3816c6fd2807SJeff Garzik { 3817c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3818c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3819c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 3820c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 3821c6fd2807SJeff Garzik 382244877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 3823c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 3824c6fd2807SJeff Garzik 3825c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3826c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 3827c6fd2807SJeff Garzik if (qc->pad_len) { 3828c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3829c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3830c6fd2807SJeff Garzik unsigned int offset; 3831c6fd2807SJeff Garzik 3832c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3833c6fd2807SJeff Garzik 3834c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3835c6fd2807SJeff Garzik 3836c6fd2807SJeff Garzik /* 3837c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 3838c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 3839c6fd2807SJeff Garzik */ 3840c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 3841c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 3842c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 3843c6fd2807SJeff Garzik 3844c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 3845c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3846c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 3847c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3848c6fd2807SJeff Garzik } 3849c6fd2807SJeff Garzik 3850c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3851c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3852c6fd2807SJeff Garzik /* trim last sg */ 3853c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 3854c6fd2807SJeff Garzik if (lsg->length == 0) 3855c6fd2807SJeff Garzik trim_sg = 1; 3856c6fd2807SJeff Garzik 3857c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 3858c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 3859c6fd2807SJeff Garzik } 3860c6fd2807SJeff Garzik 3861c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 3862c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 3863c6fd2807SJeff Garzik pre_n_elem--; 3864c6fd2807SJeff Garzik 3865c6fd2807SJeff Garzik if (!pre_n_elem) { 3866c6fd2807SJeff Garzik n_elem = 0; 3867c6fd2807SJeff Garzik goto skip_map; 3868c6fd2807SJeff Garzik } 3869c6fd2807SJeff Garzik 3870c6fd2807SJeff Garzik dir = qc->dma_dir; 3871c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 3872c6fd2807SJeff Garzik if (n_elem < 1) { 3873c6fd2807SJeff Garzik /* restore last sg */ 3874c6fd2807SJeff Garzik lsg->length += qc->pad_len; 3875c6fd2807SJeff Garzik return -1; 3876c6fd2807SJeff Garzik } 3877c6fd2807SJeff Garzik 3878c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 3879c6fd2807SJeff Garzik 3880c6fd2807SJeff Garzik skip_map: 3881c6fd2807SJeff Garzik qc->n_elem = n_elem; 3882c6fd2807SJeff Garzik 3883c6fd2807SJeff Garzik return 0; 3884c6fd2807SJeff Garzik } 3885c6fd2807SJeff Garzik 3886c6fd2807SJeff Garzik /** 3887c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 3888c6fd2807SJeff Garzik * @buf: Buffer to swap 3889c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 3890c6fd2807SJeff Garzik * 3891c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 3892c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 3893c6fd2807SJeff Garzik * vice-versa. 3894c6fd2807SJeff Garzik * 3895c6fd2807SJeff Garzik * LOCKING: 3896c6fd2807SJeff Garzik * Inherited from caller. 3897c6fd2807SJeff Garzik */ 3898c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 3899c6fd2807SJeff Garzik { 3900c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 3901c6fd2807SJeff Garzik unsigned int i; 3902c6fd2807SJeff Garzik 3903c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 3904c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 3905c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 3906c6fd2807SJeff Garzik } 3907c6fd2807SJeff Garzik 3908c6fd2807SJeff Garzik /** 39090d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 3910c6fd2807SJeff Garzik * @adev: device to target 3911c6fd2807SJeff Garzik * @buf: data buffer 3912c6fd2807SJeff Garzik * @buflen: buffer length 3913c6fd2807SJeff Garzik * @write_data: read/write 3914c6fd2807SJeff Garzik * 3915c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 3916c6fd2807SJeff Garzik * 3917c6fd2807SJeff Garzik * LOCKING: 3918c6fd2807SJeff Garzik * Inherited from caller. 3919c6fd2807SJeff Garzik */ 39200d5ff566STejun Heo void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 3921c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3922c6fd2807SJeff Garzik { 3923c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 3924c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 3925c6fd2807SJeff Garzik 3926c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 3927c6fd2807SJeff Garzik if (write_data) 39280d5ff566STejun Heo iowrite16_rep(ap->ioaddr.data_addr, buf, words); 3929c6fd2807SJeff Garzik else 39300d5ff566STejun Heo ioread16_rep(ap->ioaddr.data_addr, buf, words); 3931c6fd2807SJeff Garzik 3932c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 3933c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 3934c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 3935c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 3936c6fd2807SJeff Garzik 3937c6fd2807SJeff Garzik if (write_data) { 3938c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 39390d5ff566STejun Heo iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 3940c6fd2807SJeff Garzik } else { 39410d5ff566STejun Heo align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); 3942c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 3943c6fd2807SJeff Garzik } 3944c6fd2807SJeff Garzik } 3945c6fd2807SJeff Garzik } 3946c6fd2807SJeff Garzik 3947c6fd2807SJeff Garzik /** 39480d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 3949c6fd2807SJeff Garzik * @adev: device to target 3950c6fd2807SJeff Garzik * @buf: data buffer 3951c6fd2807SJeff Garzik * @buflen: buffer length 3952c6fd2807SJeff Garzik * @write_data: read/write 3953c6fd2807SJeff Garzik * 3954c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 3955c6fd2807SJeff Garzik * transfer with interrupts disabled. 3956c6fd2807SJeff Garzik * 3957c6fd2807SJeff Garzik * LOCKING: 3958c6fd2807SJeff Garzik * Inherited from caller. 3959c6fd2807SJeff Garzik */ 39600d5ff566STejun Heo void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 3961c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3962c6fd2807SJeff Garzik { 3963c6fd2807SJeff Garzik unsigned long flags; 3964c6fd2807SJeff Garzik local_irq_save(flags); 39650d5ff566STejun Heo ata_data_xfer(adev, buf, buflen, write_data); 3966c6fd2807SJeff Garzik local_irq_restore(flags); 3967c6fd2807SJeff Garzik } 3968c6fd2807SJeff Garzik 3969c6fd2807SJeff Garzik 3970c6fd2807SJeff Garzik /** 3971c6fd2807SJeff Garzik * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. 3972c6fd2807SJeff Garzik * @qc: Command on going 3973c6fd2807SJeff Garzik * 3974c6fd2807SJeff Garzik * Transfer ATA_SECT_SIZE of data from/to the ATA device. 3975c6fd2807SJeff Garzik * 3976c6fd2807SJeff Garzik * LOCKING: 3977c6fd2807SJeff Garzik * Inherited from caller. 3978c6fd2807SJeff Garzik */ 3979c6fd2807SJeff Garzik 3980c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 3981c6fd2807SJeff Garzik { 3982c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 3983c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3984c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3985c6fd2807SJeff Garzik struct page *page; 3986c6fd2807SJeff Garzik unsigned int offset; 3987c6fd2807SJeff Garzik unsigned char *buf; 3988c6fd2807SJeff Garzik 3989726f0785STejun Heo if (qc->curbytes == qc->nbytes - ATA_SECT_SIZE) 3990c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3991c6fd2807SJeff Garzik 3992c6fd2807SJeff Garzik page = sg[qc->cursg].page; 3993726f0785STejun Heo offset = sg[qc->cursg].offset + qc->cursg_ofs; 3994c6fd2807SJeff Garzik 3995c6fd2807SJeff Garzik /* get the current page and offset */ 3996c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 3997c6fd2807SJeff Garzik offset %= PAGE_SIZE; 3998c6fd2807SJeff Garzik 3999c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4000c6fd2807SJeff Garzik 4001c6fd2807SJeff Garzik if (PageHighMem(page)) { 4002c6fd2807SJeff Garzik unsigned long flags; 4003c6fd2807SJeff Garzik 4004c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 4005c6fd2807SJeff Garzik local_irq_save(flags); 4006c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4007c6fd2807SJeff Garzik 4008c6fd2807SJeff Garzik /* do the actual data transfer */ 4009c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 4010c6fd2807SJeff Garzik 4011c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4012c6fd2807SJeff Garzik local_irq_restore(flags); 4013c6fd2807SJeff Garzik } else { 4014c6fd2807SJeff Garzik buf = page_address(page); 4015c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 4016c6fd2807SJeff Garzik } 4017c6fd2807SJeff Garzik 4018726f0785STejun Heo qc->curbytes += ATA_SECT_SIZE; 4019726f0785STejun Heo qc->cursg_ofs += ATA_SECT_SIZE; 4020c6fd2807SJeff Garzik 4021726f0785STejun Heo if (qc->cursg_ofs == (&sg[qc->cursg])->length) { 4022c6fd2807SJeff Garzik qc->cursg++; 4023c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4024c6fd2807SJeff Garzik } 4025c6fd2807SJeff Garzik } 4026c6fd2807SJeff Garzik 4027c6fd2807SJeff Garzik /** 4028c6fd2807SJeff Garzik * ata_pio_sectors - Transfer one or many 512-byte sectors. 4029c6fd2807SJeff Garzik * @qc: Command on going 4030c6fd2807SJeff Garzik * 4031c6fd2807SJeff Garzik * Transfer one or many ATA_SECT_SIZE of data from/to the 4032c6fd2807SJeff Garzik * ATA device for the DRQ request. 4033c6fd2807SJeff Garzik * 4034c6fd2807SJeff Garzik * LOCKING: 4035c6fd2807SJeff Garzik * Inherited from caller. 4036c6fd2807SJeff Garzik */ 4037c6fd2807SJeff Garzik 4038c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 4039c6fd2807SJeff Garzik { 4040c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 4041c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 4042c6fd2807SJeff Garzik unsigned int nsect; 4043c6fd2807SJeff Garzik 4044c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 4045c6fd2807SJeff Garzik 4046726f0785STejun Heo nsect = min((qc->nbytes - qc->curbytes) / ATA_SECT_SIZE, 4047726f0785STejun Heo qc->dev->multi_count); 4048c6fd2807SJeff Garzik while (nsect--) 4049c6fd2807SJeff Garzik ata_pio_sector(qc); 4050c6fd2807SJeff Garzik } else 4051c6fd2807SJeff Garzik ata_pio_sector(qc); 4052c6fd2807SJeff Garzik } 4053c6fd2807SJeff Garzik 4054c6fd2807SJeff Garzik /** 4055c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 4056c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 4057c6fd2807SJeff Garzik * @qc: Taskfile currently active 4058c6fd2807SJeff Garzik * 4059c6fd2807SJeff Garzik * When device has indicated its readiness to accept 4060c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 4061c6fd2807SJeff Garzik * 4062c6fd2807SJeff Garzik * LOCKING: 4063c6fd2807SJeff Garzik * caller. 4064c6fd2807SJeff Garzik */ 4065c6fd2807SJeff Garzik 4066c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 4067c6fd2807SJeff Garzik { 4068c6fd2807SJeff Garzik /* send SCSI cdb */ 4069c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 4070c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 4071c6fd2807SJeff Garzik 4072c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 4073c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4074c6fd2807SJeff Garzik 4075c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4076c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4077c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4078c6fd2807SJeff Garzik break; 4079c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4080c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4081c6fd2807SJeff Garzik break; 4082c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4083c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4084c6fd2807SJeff Garzik /* initiate bmdma */ 4085c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 4086c6fd2807SJeff Garzik break; 4087c6fd2807SJeff Garzik } 4088c6fd2807SJeff Garzik } 4089c6fd2807SJeff Garzik 4090c6fd2807SJeff Garzik /** 4091c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 4092c6fd2807SJeff Garzik * @qc: Command on going 4093c6fd2807SJeff Garzik * @bytes: number of bytes 4094c6fd2807SJeff Garzik * 4095c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4096c6fd2807SJeff Garzik * 4097c6fd2807SJeff Garzik * LOCKING: 4098c6fd2807SJeff Garzik * Inherited from caller. 4099c6fd2807SJeff Garzik * 4100c6fd2807SJeff Garzik */ 4101c6fd2807SJeff Garzik 4102c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 4103c6fd2807SJeff Garzik { 4104c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4105c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4106c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4107c6fd2807SJeff Garzik struct page *page; 4108c6fd2807SJeff Garzik unsigned char *buf; 4109c6fd2807SJeff Garzik unsigned int offset, count; 4110c6fd2807SJeff Garzik 4111c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 4112c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4113c6fd2807SJeff Garzik 4114c6fd2807SJeff Garzik next_sg: 4115c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4116c6fd2807SJeff Garzik /* 4117c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4118c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4119c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4120c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4121c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4122c6fd2807SJeff Garzik */ 4123c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4124c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4125c6fd2807SJeff Garzik unsigned int i; 4126c6fd2807SJeff Garzik 4127c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4128c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4129c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4130c6fd2807SJeff Garzik 4131c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4132c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4133c6fd2807SJeff Garzik 4134c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4135c6fd2807SJeff Garzik return; 4136c6fd2807SJeff Garzik } 4137c6fd2807SJeff Garzik 4138c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4139c6fd2807SJeff Garzik 4140c6fd2807SJeff Garzik page = sg->page; 4141c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4142c6fd2807SJeff Garzik 4143c6fd2807SJeff Garzik /* get the current page and offset */ 4144c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4145c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4146c6fd2807SJeff Garzik 4147c6fd2807SJeff Garzik /* don't overrun current sg */ 4148c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4149c6fd2807SJeff Garzik 4150c6fd2807SJeff Garzik /* don't cross page boundaries */ 4151c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4152c6fd2807SJeff Garzik 4153c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4154c6fd2807SJeff Garzik 4155c6fd2807SJeff Garzik if (PageHighMem(page)) { 4156c6fd2807SJeff Garzik unsigned long flags; 4157c6fd2807SJeff Garzik 4158c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4159c6fd2807SJeff Garzik local_irq_save(flags); 4160c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4161c6fd2807SJeff Garzik 4162c6fd2807SJeff Garzik /* do the actual data transfer */ 4163c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4164c6fd2807SJeff Garzik 4165c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4166c6fd2807SJeff Garzik local_irq_restore(flags); 4167c6fd2807SJeff Garzik } else { 4168c6fd2807SJeff Garzik buf = page_address(page); 4169c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4170c6fd2807SJeff Garzik } 4171c6fd2807SJeff Garzik 4172c6fd2807SJeff Garzik bytes -= count; 4173c6fd2807SJeff Garzik qc->curbytes += count; 4174c6fd2807SJeff Garzik qc->cursg_ofs += count; 4175c6fd2807SJeff Garzik 4176c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 4177c6fd2807SJeff Garzik qc->cursg++; 4178c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4179c6fd2807SJeff Garzik } 4180c6fd2807SJeff Garzik 4181c6fd2807SJeff Garzik if (bytes) 4182c6fd2807SJeff Garzik goto next_sg; 4183c6fd2807SJeff Garzik } 4184c6fd2807SJeff Garzik 4185c6fd2807SJeff Garzik /** 4186c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 4187c6fd2807SJeff Garzik * @qc: Command on going 4188c6fd2807SJeff Garzik * 4189c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4190c6fd2807SJeff Garzik * 4191c6fd2807SJeff Garzik * LOCKING: 4192c6fd2807SJeff Garzik * Inherited from caller. 4193c6fd2807SJeff Garzik */ 4194c6fd2807SJeff Garzik 4195c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 4196c6fd2807SJeff Garzik { 4197c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4198c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 4199c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 4200c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 4201c6fd2807SJeff Garzik 4202c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 4203c6fd2807SJeff Garzik * here to save some kernel stack usage. 4204c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 4205c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 4206c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 4207c6fd2807SJeff Garzik */ 4208c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 4209c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 4210c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 4211c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 4212c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 4213c6fd2807SJeff Garzik 4214c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 4215c6fd2807SJeff Garzik if (ireason & (1 << 0)) 4216c6fd2807SJeff Garzik goto err_out; 4217c6fd2807SJeff Garzik 4218c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 4219c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 4220c6fd2807SJeff Garzik if (do_write != i_write) 4221c6fd2807SJeff Garzik goto err_out; 4222c6fd2807SJeff Garzik 422344877b4eSTejun Heo VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); 4224c6fd2807SJeff Garzik 4225c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 4226c6fd2807SJeff Garzik 4227c6fd2807SJeff Garzik return; 4228c6fd2807SJeff Garzik 4229c6fd2807SJeff Garzik err_out: 4230c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 4231c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4232c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4233c6fd2807SJeff Garzik } 4234c6fd2807SJeff Garzik 4235c6fd2807SJeff Garzik /** 4236c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 4237c6fd2807SJeff Garzik * @ap: the target ata_port 4238c6fd2807SJeff Garzik * @qc: qc on going 4239c6fd2807SJeff Garzik * 4240c6fd2807SJeff Garzik * RETURNS: 4241c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 4242c6fd2807SJeff Garzik */ 4243c6fd2807SJeff Garzik 4244c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 4245c6fd2807SJeff Garzik { 4246c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4247c6fd2807SJeff Garzik return 1; 4248c6fd2807SJeff Garzik 4249c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 4250c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 4251c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 4252c6fd2807SJeff Garzik return 1; 4253c6fd2807SJeff Garzik 4254c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 4255c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4256c6fd2807SJeff Garzik return 1; 4257c6fd2807SJeff Garzik } 4258c6fd2807SJeff Garzik 4259c6fd2807SJeff Garzik return 0; 4260c6fd2807SJeff Garzik } 4261c6fd2807SJeff Garzik 4262c6fd2807SJeff Garzik /** 4263c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 4264c6fd2807SJeff Garzik * @qc: Command to complete 4265c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4266c6fd2807SJeff Garzik * 4267c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 4268c6fd2807SJeff Garzik * 4269c6fd2807SJeff Garzik * LOCKING: 4270cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 4271c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 4272c6fd2807SJeff Garzik */ 4273c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 4274c6fd2807SJeff Garzik { 4275c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4276c6fd2807SJeff Garzik unsigned long flags; 4277c6fd2807SJeff Garzik 4278c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4279c6fd2807SJeff Garzik if (in_wq) { 4280c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4281c6fd2807SJeff Garzik 4282cca3974eSJeff Garzik /* EH might have kicked in while host lock is 4283cca3974eSJeff Garzik * released. 4284c6fd2807SJeff Garzik */ 4285c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 4286c6fd2807SJeff Garzik if (qc) { 4287c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 428883625006SAkira Iguchi ap->ops->irq_on(ap); 4289c6fd2807SJeff Garzik ata_qc_complete(qc); 4290c6fd2807SJeff Garzik } else 4291c6fd2807SJeff Garzik ata_port_freeze(ap); 4292c6fd2807SJeff Garzik } 4293c6fd2807SJeff Garzik 4294c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4295c6fd2807SJeff Garzik } else { 4296c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 4297c6fd2807SJeff Garzik ata_qc_complete(qc); 4298c6fd2807SJeff Garzik else 4299c6fd2807SJeff Garzik ata_port_freeze(ap); 4300c6fd2807SJeff Garzik } 4301c6fd2807SJeff Garzik } else { 4302c6fd2807SJeff Garzik if (in_wq) { 4303c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 430483625006SAkira Iguchi ap->ops->irq_on(ap); 4305c6fd2807SJeff Garzik ata_qc_complete(qc); 4306c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4307c6fd2807SJeff Garzik } else 4308c6fd2807SJeff Garzik ata_qc_complete(qc); 4309c6fd2807SJeff Garzik } 4310c6fd2807SJeff Garzik 4311c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4312c6fd2807SJeff Garzik } 4313c6fd2807SJeff Garzik 4314c6fd2807SJeff Garzik /** 4315c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 4316c6fd2807SJeff Garzik * @ap: the target ata_port 4317c6fd2807SJeff Garzik * @qc: qc on going 4318c6fd2807SJeff Garzik * @status: current device status 4319c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4320c6fd2807SJeff Garzik * 4321c6fd2807SJeff Garzik * RETURNS: 4322c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 4323c6fd2807SJeff Garzik */ 4324c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 4325c6fd2807SJeff Garzik u8 status, int in_wq) 4326c6fd2807SJeff Garzik { 4327c6fd2807SJeff Garzik unsigned long flags = 0; 4328c6fd2807SJeff Garzik int poll_next; 4329c6fd2807SJeff Garzik 4330c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 4331c6fd2807SJeff Garzik 4332c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 4333c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 4334c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 4335c6fd2807SJeff Garzik */ 4336c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 4337c6fd2807SJeff Garzik 4338c6fd2807SJeff Garzik fsm_start: 4339c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 434044877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); 4341c6fd2807SJeff Garzik 4342c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4343c6fd2807SJeff Garzik case HSM_ST_FIRST: 4344c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 4345c6fd2807SJeff Garzik 4346c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 4347c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 4348c6fd2807SJeff Garzik * takes over after sending the data. 4349c6fd2807SJeff Garzik */ 4350c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 4351c6fd2807SJeff Garzik 4352c6fd2807SJeff Garzik /* check device status */ 4353c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4354c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4355c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4356c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4357c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4358c6fd2807SJeff Garzik else 4359c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 4360c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4361c6fd2807SJeff Garzik 4362c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4363c6fd2807SJeff Garzik goto fsm_start; 4364c6fd2807SJeff Garzik } 4365c6fd2807SJeff Garzik 4366c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4367c6fd2807SJeff Garzik * when it finds something wrong. 4368c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4369c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4370c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4371c6fd2807SJeff Garzik */ 4372c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 437344877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " 437444877b4eSTejun Heo "error, dev_stat 0x%X\n", status); 4375c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4376c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4377c6fd2807SJeff Garzik goto fsm_start; 4378c6fd2807SJeff Garzik } 4379c6fd2807SJeff Garzik 4380c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 4381c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 4382c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 4383c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 4384c6fd2807SJeff Garzik */ 4385c6fd2807SJeff Garzik if (in_wq) 4386c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4387c6fd2807SJeff Garzik 4388c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 4389c6fd2807SJeff Garzik /* PIO data out protocol. 4390c6fd2807SJeff Garzik * send first data block. 4391c6fd2807SJeff Garzik */ 4392c6fd2807SJeff Garzik 4393c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 4394c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 4395c6fd2807SJeff Garzik * before ata_pio_sectors(). 4396c6fd2807SJeff Garzik */ 4397c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4398c6fd2807SJeff Garzik ata_pio_sectors(qc); 4399c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4400c6fd2807SJeff Garzik } else 4401c6fd2807SJeff Garzik /* send CDB */ 4402c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 4403c6fd2807SJeff Garzik 4404c6fd2807SJeff Garzik if (in_wq) 4405c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4406c6fd2807SJeff Garzik 4407c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4408c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4409c6fd2807SJeff Garzik */ 4410c6fd2807SJeff Garzik break; 4411c6fd2807SJeff Garzik 4412c6fd2807SJeff Garzik case HSM_ST: 4413c6fd2807SJeff Garzik /* complete command or read/write the data register */ 4414c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 4415c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 4416c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 4417c6fd2807SJeff Garzik /* No more data to transfer or device error. 4418c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 4419c6fd2807SJeff Garzik */ 4420c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4421c6fd2807SJeff Garzik goto fsm_start; 4422c6fd2807SJeff Garzik } 4423c6fd2807SJeff Garzik 4424c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4425c6fd2807SJeff Garzik * when it finds something wrong. 4426c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4427c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4428c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4429c6fd2807SJeff Garzik */ 4430c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 443144877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " 443244877b4eSTejun Heo "device error, dev_stat 0x%X\n", 443344877b4eSTejun Heo status); 4434c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4435c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4436c6fd2807SJeff Garzik goto fsm_start; 4437c6fd2807SJeff Garzik } 4438c6fd2807SJeff Garzik 4439c6fd2807SJeff Garzik atapi_pio_bytes(qc); 4440c6fd2807SJeff Garzik 4441c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 4442c6fd2807SJeff Garzik /* bad ireason reported by device */ 4443c6fd2807SJeff Garzik goto fsm_start; 4444c6fd2807SJeff Garzik 4445c6fd2807SJeff Garzik } else { 4446c6fd2807SJeff Garzik /* ATA PIO protocol */ 4447c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4448c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4449c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4450c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4451c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4452c6fd2807SJeff Garzik else 445355a8e2c8STejun Heo /* HSM violation. Let EH handle this. 445455a8e2c8STejun Heo * Phantom devices also trigger this 445555a8e2c8STejun Heo * condition. Mark hint. 445655a8e2c8STejun Heo */ 445755a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 445855a8e2c8STejun Heo AC_ERR_NODEV_HINT; 4459c6fd2807SJeff Garzik 4460c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4461c6fd2807SJeff Garzik goto fsm_start; 4462c6fd2807SJeff Garzik } 4463c6fd2807SJeff Garzik 4464c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 4465c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 4466c6fd2807SJeff Garzik * We respect DRQ here and transfer one 4467c6fd2807SJeff Garzik * block of junk data before changing the 4468c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 4469c6fd2807SJeff Garzik * 4470c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 4471c6fd2807SJeff Garzik * sense since the data block has been 4472c6fd2807SJeff Garzik * transferred to the device. 4473c6fd2807SJeff Garzik */ 4474c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4475c6fd2807SJeff Garzik /* data might be corrputed */ 4476c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4477c6fd2807SJeff Garzik 4478c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 4479c6fd2807SJeff Garzik ata_pio_sectors(qc); 4480c6fd2807SJeff Garzik ata_altstatus(ap); 4481c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4482c6fd2807SJeff Garzik } 4483c6fd2807SJeff Garzik 4484c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 4485c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4486c6fd2807SJeff Garzik 4487c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 4488c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 4489c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 4490c6fd2807SJeff Garzik */ 4491c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4492c6fd2807SJeff Garzik goto fsm_start; 4493c6fd2807SJeff Garzik } 4494c6fd2807SJeff Garzik 4495c6fd2807SJeff Garzik ata_pio_sectors(qc); 4496c6fd2807SJeff Garzik 4497c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 4498c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 4499c6fd2807SJeff Garzik /* all data read */ 4500c6fd2807SJeff Garzik ata_altstatus(ap); 4501c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4502c6fd2807SJeff Garzik goto fsm_start; 4503c6fd2807SJeff Garzik } 4504c6fd2807SJeff Garzik } 4505c6fd2807SJeff Garzik 4506c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4507c6fd2807SJeff Garzik poll_next = 1; 4508c6fd2807SJeff Garzik break; 4509c6fd2807SJeff Garzik 4510c6fd2807SJeff Garzik case HSM_ST_LAST: 4511c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 4512c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 4513c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4514c6fd2807SJeff Garzik goto fsm_start; 4515c6fd2807SJeff Garzik } 4516c6fd2807SJeff Garzik 4517c6fd2807SJeff Garzik /* no more data to transfer */ 4518c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 451944877b4eSTejun Heo ap->print_id, qc->dev->devno, status); 4520c6fd2807SJeff Garzik 4521c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 4522c6fd2807SJeff Garzik 4523c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4524c6fd2807SJeff Garzik 4525c6fd2807SJeff Garzik /* complete taskfile transaction */ 4526c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4527c6fd2807SJeff Garzik 4528c6fd2807SJeff Garzik poll_next = 0; 4529c6fd2807SJeff Garzik break; 4530c6fd2807SJeff Garzik 4531c6fd2807SJeff Garzik case HSM_ST_ERR: 4532c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 4533c6fd2807SJeff Garzik * know what's wrong and recover 4534c6fd2807SJeff Garzik */ 4535c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 4536c6fd2807SJeff Garzik 4537c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4538c6fd2807SJeff Garzik 4539c6fd2807SJeff Garzik /* complete taskfile transaction */ 4540c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4541c6fd2807SJeff Garzik 4542c6fd2807SJeff Garzik poll_next = 0; 4543c6fd2807SJeff Garzik break; 4544c6fd2807SJeff Garzik default: 4545c6fd2807SJeff Garzik poll_next = 0; 4546c6fd2807SJeff Garzik BUG(); 4547c6fd2807SJeff Garzik } 4548c6fd2807SJeff Garzik 4549c6fd2807SJeff Garzik return poll_next; 4550c6fd2807SJeff Garzik } 4551c6fd2807SJeff Garzik 455265f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 4553c6fd2807SJeff Garzik { 455465f27f38SDavid Howells struct ata_port *ap = 455565f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 455665f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 4557c6fd2807SJeff Garzik u8 status; 4558c6fd2807SJeff Garzik int poll_next; 4559c6fd2807SJeff Garzik 4560c6fd2807SJeff Garzik fsm_start: 4561c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 4562c6fd2807SJeff Garzik 4563c6fd2807SJeff Garzik /* 4564c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 4565c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 4566c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 4567c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 4568c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 4569c6fd2807SJeff Garzik */ 4570c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 4571c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4572c6fd2807SJeff Garzik msleep(2); 4573c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 4574c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4575c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 4576c6fd2807SJeff Garzik return; 4577c6fd2807SJeff Garzik } 4578c6fd2807SJeff Garzik } 4579c6fd2807SJeff Garzik 4580c6fd2807SJeff Garzik /* move the HSM */ 4581c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 4582c6fd2807SJeff Garzik 4583c6fd2807SJeff Garzik /* another command or interrupt handler 4584c6fd2807SJeff Garzik * may be running at this point. 4585c6fd2807SJeff Garzik */ 4586c6fd2807SJeff Garzik if (poll_next) 4587c6fd2807SJeff Garzik goto fsm_start; 4588c6fd2807SJeff Garzik } 4589c6fd2807SJeff Garzik 4590c6fd2807SJeff Garzik /** 4591c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 4592c6fd2807SJeff Garzik * @ap: Port associated with device @dev 4593c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4594c6fd2807SJeff Garzik * 4595c6fd2807SJeff Garzik * LOCKING: 4596c6fd2807SJeff Garzik * None. 4597c6fd2807SJeff Garzik */ 4598c6fd2807SJeff Garzik 4599c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 4600c6fd2807SJeff Garzik { 4601c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 4602c6fd2807SJeff Garzik unsigned int i; 4603c6fd2807SJeff Garzik 4604c6fd2807SJeff Garzik /* no command while frozen */ 4605c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 4606c6fd2807SJeff Garzik return NULL; 4607c6fd2807SJeff Garzik 4608c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 4609c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 4610c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 4611c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 4612c6fd2807SJeff Garzik break; 4613c6fd2807SJeff Garzik } 4614c6fd2807SJeff Garzik 4615c6fd2807SJeff Garzik if (qc) 4616c6fd2807SJeff Garzik qc->tag = i; 4617c6fd2807SJeff Garzik 4618c6fd2807SJeff Garzik return qc; 4619c6fd2807SJeff Garzik } 4620c6fd2807SJeff Garzik 4621c6fd2807SJeff Garzik /** 4622c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 4623c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4624c6fd2807SJeff Garzik * 4625c6fd2807SJeff Garzik * LOCKING: 4626c6fd2807SJeff Garzik * None. 4627c6fd2807SJeff Garzik */ 4628c6fd2807SJeff Garzik 4629c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 4630c6fd2807SJeff Garzik { 4631c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 4632c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4633c6fd2807SJeff Garzik 4634c6fd2807SJeff Garzik qc = ata_qc_new(ap); 4635c6fd2807SJeff Garzik if (qc) { 4636c6fd2807SJeff Garzik qc->scsicmd = NULL; 4637c6fd2807SJeff Garzik qc->ap = ap; 4638c6fd2807SJeff Garzik qc->dev = dev; 4639c6fd2807SJeff Garzik 4640c6fd2807SJeff Garzik ata_qc_reinit(qc); 4641c6fd2807SJeff Garzik } 4642c6fd2807SJeff Garzik 4643c6fd2807SJeff Garzik return qc; 4644c6fd2807SJeff Garzik } 4645c6fd2807SJeff Garzik 4646c6fd2807SJeff Garzik /** 4647c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 4648c6fd2807SJeff Garzik * @qc: Command to complete 4649c6fd2807SJeff Garzik * 4650c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 4651c6fd2807SJeff Garzik * in case something prevents using it. 4652c6fd2807SJeff Garzik * 4653c6fd2807SJeff Garzik * LOCKING: 4654cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4655c6fd2807SJeff Garzik */ 4656c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 4657c6fd2807SJeff Garzik { 4658c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4659c6fd2807SJeff Garzik unsigned int tag; 4660c6fd2807SJeff Garzik 4661c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4662c6fd2807SJeff Garzik 4663c6fd2807SJeff Garzik qc->flags = 0; 4664c6fd2807SJeff Garzik tag = qc->tag; 4665c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 4666c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 4667c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 4668c6fd2807SJeff Garzik } 4669c6fd2807SJeff Garzik } 4670c6fd2807SJeff Garzik 4671c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 4672c6fd2807SJeff Garzik { 4673c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4674c6fd2807SJeff Garzik 4675c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4676c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4677c6fd2807SJeff Garzik 4678c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4679c6fd2807SJeff Garzik ata_sg_clean(qc); 4680c6fd2807SJeff Garzik 4681c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 4682c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) 4683c6fd2807SJeff Garzik ap->sactive &= ~(1 << qc->tag); 4684c6fd2807SJeff Garzik else 4685c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 4686c6fd2807SJeff Garzik 4687c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 4688c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 4689c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 4690c6fd2807SJeff Garzik */ 4691c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 4692c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 4693c6fd2807SJeff Garzik 4694c6fd2807SJeff Garzik /* call completion callback */ 4695c6fd2807SJeff Garzik qc->complete_fn(qc); 4696c6fd2807SJeff Garzik } 4697c6fd2807SJeff Garzik 469839599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 469939599a53STejun Heo { 470039599a53STejun Heo struct ata_port *ap = qc->ap; 470139599a53STejun Heo 470239599a53STejun Heo ap->ops->tf_read(ap, &qc->result_tf); 470339599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 470439599a53STejun Heo } 470539599a53STejun Heo 4706c6fd2807SJeff Garzik /** 4707c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 4708c6fd2807SJeff Garzik * @qc: Command to complete 4709c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 4710c6fd2807SJeff Garzik * 4711c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 4712c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 4713c6fd2807SJeff Garzik * 4714c6fd2807SJeff Garzik * LOCKING: 4715cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4716c6fd2807SJeff Garzik */ 4717c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 4718c6fd2807SJeff Garzik { 4719c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4720c6fd2807SJeff Garzik 4721c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 4722c6fd2807SJeff Garzik * synchronize EH with regular execution path. 4723c6fd2807SJeff Garzik * 4724c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 4725c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 4726c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 4727c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 4728c6fd2807SJeff Garzik * 4729c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 4730c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 4731c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 4732c6fd2807SJeff Garzik * taken care of. 4733c6fd2807SJeff Garzik */ 4734c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4735c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 4736c6fd2807SJeff Garzik 4737c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4738c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 4739c6fd2807SJeff Garzik 4740c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 4741c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 4742c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 474339599a53STejun Heo fill_result_tf(qc); 4744c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 4745c6fd2807SJeff Garzik return; 4746c6fd2807SJeff Garzik } 4747c6fd2807SJeff Garzik } 4748c6fd2807SJeff Garzik 4749c6fd2807SJeff Garzik /* read result TF if requested */ 4750c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 475139599a53STejun Heo fill_result_tf(qc); 4752c6fd2807SJeff Garzik 4753c6fd2807SJeff Garzik __ata_qc_complete(qc); 4754c6fd2807SJeff Garzik } else { 4755c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 4756c6fd2807SJeff Garzik return; 4757c6fd2807SJeff Garzik 4758c6fd2807SJeff Garzik /* read result TF if failed or requested */ 4759c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 476039599a53STejun Heo fill_result_tf(qc); 4761c6fd2807SJeff Garzik 4762c6fd2807SJeff Garzik __ata_qc_complete(qc); 4763c6fd2807SJeff Garzik } 4764c6fd2807SJeff Garzik } 4765c6fd2807SJeff Garzik 4766c6fd2807SJeff Garzik /** 4767c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 4768c6fd2807SJeff Garzik * @ap: port in question 4769c6fd2807SJeff Garzik * @qc_active: new qc_active mask 4770c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 4771c6fd2807SJeff Garzik * 4772c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 4773c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 4774c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 4775c6fd2807SJeff Garzik * and commands are completed accordingly. 4776c6fd2807SJeff Garzik * 4777c6fd2807SJeff Garzik * LOCKING: 4778cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4779c6fd2807SJeff Garzik * 4780c6fd2807SJeff Garzik * RETURNS: 4781c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 4782c6fd2807SJeff Garzik */ 4783c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 4784c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 4785c6fd2807SJeff Garzik { 4786c6fd2807SJeff Garzik int nr_done = 0; 4787c6fd2807SJeff Garzik u32 done_mask; 4788c6fd2807SJeff Garzik int i; 4789c6fd2807SJeff Garzik 4790c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 4791c6fd2807SJeff Garzik 4792c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 4793c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 4794c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 4795c6fd2807SJeff Garzik return -EINVAL; 4796c6fd2807SJeff Garzik } 4797c6fd2807SJeff Garzik 4798c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 4799c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4800c6fd2807SJeff Garzik 4801c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 4802c6fd2807SJeff Garzik continue; 4803c6fd2807SJeff Garzik 4804c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 4805c6fd2807SJeff Garzik if (finish_qc) 4806c6fd2807SJeff Garzik finish_qc(qc); 4807c6fd2807SJeff Garzik ata_qc_complete(qc); 4808c6fd2807SJeff Garzik nr_done++; 4809c6fd2807SJeff Garzik } 4810c6fd2807SJeff Garzik } 4811c6fd2807SJeff Garzik 4812c6fd2807SJeff Garzik return nr_done; 4813c6fd2807SJeff Garzik } 4814c6fd2807SJeff Garzik 4815c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 4816c6fd2807SJeff Garzik { 4817c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4818c6fd2807SJeff Garzik 4819c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4820c6fd2807SJeff Garzik case ATA_PROT_NCQ: 4821c6fd2807SJeff Garzik case ATA_PROT_DMA: 4822c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4823c6fd2807SJeff Garzik return 1; 4824c6fd2807SJeff Garzik 4825c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4826c6fd2807SJeff Garzik case ATA_PROT_PIO: 4827c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 4828c6fd2807SJeff Garzik return 1; 4829c6fd2807SJeff Garzik 4830c6fd2807SJeff Garzik /* fall through */ 4831c6fd2807SJeff Garzik 4832c6fd2807SJeff Garzik default: 4833c6fd2807SJeff Garzik return 0; 4834c6fd2807SJeff Garzik } 4835c6fd2807SJeff Garzik 4836c6fd2807SJeff Garzik /* never reached */ 4837c6fd2807SJeff Garzik } 4838c6fd2807SJeff Garzik 4839c6fd2807SJeff Garzik /** 4840c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 4841c6fd2807SJeff Garzik * @qc: command to issue to device 4842c6fd2807SJeff Garzik * 4843c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 4844c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 4845c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 4846c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 4847c6fd2807SJeff Garzik * 4848c6fd2807SJeff Garzik * LOCKING: 4849cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4850c6fd2807SJeff Garzik */ 4851c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 4852c6fd2807SJeff Garzik { 4853c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4854c6fd2807SJeff Garzik 4855c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 4856c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 4857c6fd2807SJeff Garzik * request ATAPI sense. 4858c6fd2807SJeff Garzik */ 4859c6fd2807SJeff Garzik WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); 4860c6fd2807SJeff Garzik 4861c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 4862c6fd2807SJeff Garzik WARN_ON(ap->sactive & (1 << qc->tag)); 4863c6fd2807SJeff Garzik ap->sactive |= 1 << qc->tag; 4864c6fd2807SJeff Garzik } else { 4865c6fd2807SJeff Garzik WARN_ON(ap->sactive); 4866c6fd2807SJeff Garzik ap->active_tag = qc->tag; 4867c6fd2807SJeff Garzik } 4868c6fd2807SJeff Garzik 4869c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 4870c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 4871c6fd2807SJeff Garzik 4872c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 4873c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 4874c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 4875c6fd2807SJeff Garzik goto sg_err; 4876c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 4877c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 4878c6fd2807SJeff Garzik goto sg_err; 4879c6fd2807SJeff Garzik } 4880c6fd2807SJeff Garzik } else { 4881c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4882c6fd2807SJeff Garzik } 4883c6fd2807SJeff Garzik 4884c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 4885c6fd2807SJeff Garzik 4886c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 4887c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4888c6fd2807SJeff Garzik goto err; 4889c6fd2807SJeff Garzik return; 4890c6fd2807SJeff Garzik 4891c6fd2807SJeff Garzik sg_err: 4892c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4893c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 4894c6fd2807SJeff Garzik err: 4895c6fd2807SJeff Garzik ata_qc_complete(qc); 4896c6fd2807SJeff Garzik } 4897c6fd2807SJeff Garzik 4898c6fd2807SJeff Garzik /** 4899c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 4900c6fd2807SJeff Garzik * @qc: command to issue to device 4901c6fd2807SJeff Garzik * 4902c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 4903c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 4904c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 4905c6fd2807SJeff Garzik * is slightly different. 4906c6fd2807SJeff Garzik * 4907c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 4908c6fd2807SJeff Garzik * 4909c6fd2807SJeff Garzik * LOCKING: 4910cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4911c6fd2807SJeff Garzik * 4912c6fd2807SJeff Garzik * RETURNS: 4913c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 4914c6fd2807SJeff Garzik */ 4915c6fd2807SJeff Garzik 4916c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 4917c6fd2807SJeff Garzik { 4918c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4919c6fd2807SJeff Garzik 4920c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 4921c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 4922c6fd2807SJeff Garzik */ 4923c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 4924c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4925c6fd2807SJeff Garzik case ATA_PROT_PIO: 4926e3472cbeSAlbert Lee case ATA_PROT_NODATA: 4927c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4928c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4929c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 4930c6fd2807SJeff Garzik break; 4931c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4932c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 4933c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 4934c6fd2807SJeff Garzik BUG(); 4935c6fd2807SJeff Garzik break; 4936c6fd2807SJeff Garzik default: 4937c6fd2807SJeff Garzik break; 4938c6fd2807SJeff Garzik } 4939c6fd2807SJeff Garzik } 4940c6fd2807SJeff Garzik 49413d3cca37STejun Heo /* Some controllers show flaky interrupt behavior after 49423d3cca37STejun Heo * setting xfer mode. Use polling instead. 49433d3cca37STejun Heo */ 49443d3cca37STejun Heo if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && 49453d3cca37STejun Heo qc->tf.feature == SETFEATURES_XFER) && 49463d3cca37STejun Heo (ap->flags & ATA_FLAG_SETXFER_POLLING)) 49473d3cca37STejun Heo qc->tf.flags |= ATA_TFLAG_POLLING; 49483d3cca37STejun Heo 4949c6fd2807SJeff Garzik /* select the device */ 4950c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 4951c6fd2807SJeff Garzik 4952c6fd2807SJeff Garzik /* start the command */ 4953c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4954c6fd2807SJeff Garzik case ATA_PROT_NODATA: 4955c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4956c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4957c6fd2807SJeff Garzik 4958c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4959c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4960c6fd2807SJeff Garzik 4961c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4962c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4963c6fd2807SJeff Garzik 4964c6fd2807SJeff Garzik break; 4965c6fd2807SJeff Garzik 4966c6fd2807SJeff Garzik case ATA_PROT_DMA: 4967c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 4968c6fd2807SJeff Garzik 4969c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 4970c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 4971c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 4972c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4973c6fd2807SJeff Garzik break; 4974c6fd2807SJeff Garzik 4975c6fd2807SJeff Garzik case ATA_PROT_PIO: 4976c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4977c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4978c6fd2807SJeff Garzik 4979c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4980c6fd2807SJeff Garzik 4981c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4982c6fd2807SJeff Garzik /* PIO data out protocol */ 4983c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4984c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4985c6fd2807SJeff Garzik 4986c6fd2807SJeff Garzik /* always send first data block using 4987c6fd2807SJeff Garzik * the ata_pio_task() codepath. 4988c6fd2807SJeff Garzik */ 4989c6fd2807SJeff Garzik } else { 4990c6fd2807SJeff Garzik /* PIO data in protocol */ 4991c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4992c6fd2807SJeff Garzik 4993c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4994c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4995c6fd2807SJeff Garzik 4996c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4997c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4998c6fd2807SJeff Garzik */ 4999c6fd2807SJeff Garzik } 5000c6fd2807SJeff Garzik 5001c6fd2807SJeff Garzik break; 5002c6fd2807SJeff Garzik 5003c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5004c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5005c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5006c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5007c6fd2807SJeff Garzik 5008c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5009c6fd2807SJeff Garzik 5010c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5011c6fd2807SJeff Garzik 5012c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5013c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 5014c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 5015c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5016c6fd2807SJeff Garzik break; 5017c6fd2807SJeff Garzik 5018c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5019c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5020c6fd2807SJeff Garzik 5021c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5022c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5023c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5024c6fd2807SJeff Garzik 5025c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5026c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5027c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5028c6fd2807SJeff Garzik break; 5029c6fd2807SJeff Garzik 5030c6fd2807SJeff Garzik default: 5031c6fd2807SJeff Garzik WARN_ON(1); 5032c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 5033c6fd2807SJeff Garzik } 5034c6fd2807SJeff Garzik 5035c6fd2807SJeff Garzik return 0; 5036c6fd2807SJeff Garzik } 5037c6fd2807SJeff Garzik 5038c6fd2807SJeff Garzik /** 5039c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 5040c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 5041c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 5042c6fd2807SJeff Garzik * 5043c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 5044c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 5045c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 5046c6fd2807SJeff Garzik * 5047c6fd2807SJeff Garzik * LOCKING: 5048cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5049c6fd2807SJeff Garzik * 5050c6fd2807SJeff Garzik * RETURNS: 5051c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 5052c6fd2807SJeff Garzik */ 5053c6fd2807SJeff Garzik 5054c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 5055c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 5056c6fd2807SJeff Garzik { 5057ea54763fSTejun Heo struct ata_eh_info *ehi = &ap->eh_info; 5058c6fd2807SJeff Garzik u8 status, host_stat = 0; 5059c6fd2807SJeff Garzik 5060c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 506144877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state); 5062c6fd2807SJeff Garzik 5063c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 5064c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5065c6fd2807SJeff Garzik case HSM_ST_FIRST: 5066c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 5067c6fd2807SJeff Garzik * at this state when ready to receive CDB. 5068c6fd2807SJeff Garzik */ 5069c6fd2807SJeff Garzik 5070c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 5071c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 5072c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 5073c6fd2807SJeff Garzik */ 5074c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5075c6fd2807SJeff Garzik goto idle_irq; 5076c6fd2807SJeff Garzik break; 5077c6fd2807SJeff Garzik case HSM_ST_LAST: 5078c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 5079c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 5080c6fd2807SJeff Garzik /* check status of DMA engine */ 5081c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 508244877b4eSTejun Heo VPRINTK("ata%u: host_stat 0x%X\n", 508344877b4eSTejun Heo ap->print_id, host_stat); 5084c6fd2807SJeff Garzik 5085c6fd2807SJeff Garzik /* if it's not our irq... */ 5086c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 5087c6fd2807SJeff Garzik goto idle_irq; 5088c6fd2807SJeff Garzik 5089c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 5090c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 5091c6fd2807SJeff Garzik 5092c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 5093c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 5094c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 5095c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5096c6fd2807SJeff Garzik } 5097c6fd2807SJeff Garzik } 5098c6fd2807SJeff Garzik break; 5099c6fd2807SJeff Garzik case HSM_ST: 5100c6fd2807SJeff Garzik break; 5101c6fd2807SJeff Garzik default: 5102c6fd2807SJeff Garzik goto idle_irq; 5103c6fd2807SJeff Garzik } 5104c6fd2807SJeff Garzik 5105c6fd2807SJeff Garzik /* check altstatus */ 5106c6fd2807SJeff Garzik status = ata_altstatus(ap); 5107c6fd2807SJeff Garzik if (status & ATA_BUSY) 5108c6fd2807SJeff Garzik goto idle_irq; 5109c6fd2807SJeff Garzik 5110c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 5111c6fd2807SJeff Garzik status = ata_chk_status(ap); 5112c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 5113c6fd2807SJeff Garzik goto idle_irq; 5114c6fd2807SJeff Garzik 5115c6fd2807SJeff Garzik /* ack bmdma irq events */ 5116c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 5117c6fd2807SJeff Garzik 5118c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5119ea54763fSTejun Heo 5120ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5121ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5122ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5123ea54763fSTejun Heo 5124c6fd2807SJeff Garzik return 1; /* irq handled */ 5125c6fd2807SJeff Garzik 5126c6fd2807SJeff Garzik idle_irq: 5127c6fd2807SJeff Garzik ap->stats.idle_irq++; 5128c6fd2807SJeff Garzik 5129c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5130c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 513183625006SAkira Iguchi ap->ops->irq_ack(ap, 0); /* debug trap */ 5132c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5133c6fd2807SJeff Garzik return 1; 5134c6fd2807SJeff Garzik } 5135c6fd2807SJeff Garzik #endif 5136c6fd2807SJeff Garzik return 0; /* irq not handled */ 5137c6fd2807SJeff Garzik } 5138c6fd2807SJeff Garzik 5139c6fd2807SJeff Garzik /** 5140c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5141c6fd2807SJeff Garzik * @irq: irq line (unused) 5142cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5143c6fd2807SJeff Garzik * 5144c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5145c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5146c6fd2807SJeff Garzik * 5147c6fd2807SJeff Garzik * LOCKING: 5148cca3974eSJeff Garzik * Obtains host lock during operation. 5149c6fd2807SJeff Garzik * 5150c6fd2807SJeff Garzik * RETURNS: 5151c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5152c6fd2807SJeff Garzik */ 5153c6fd2807SJeff Garzik 51547d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5155c6fd2807SJeff Garzik { 5156cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5157c6fd2807SJeff Garzik unsigned int i; 5158c6fd2807SJeff Garzik unsigned int handled = 0; 5159c6fd2807SJeff Garzik unsigned long flags; 5160c6fd2807SJeff Garzik 5161c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5162cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5163c6fd2807SJeff Garzik 5164cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5165c6fd2807SJeff Garzik struct ata_port *ap; 5166c6fd2807SJeff Garzik 5167cca3974eSJeff Garzik ap = host->ports[i]; 5168c6fd2807SJeff Garzik if (ap && 5169c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 5170c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5171c6fd2807SJeff Garzik 5172c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, ap->active_tag); 5173c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 5174c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 5175c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 5176c6fd2807SJeff Garzik } 5177c6fd2807SJeff Garzik } 5178c6fd2807SJeff Garzik 5179cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 5180c6fd2807SJeff Garzik 5181c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 5182c6fd2807SJeff Garzik } 5183c6fd2807SJeff Garzik 5184c6fd2807SJeff Garzik /** 5185c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5186c6fd2807SJeff Garzik * @ap: ATA port to test SCR accessibility for 5187c6fd2807SJeff Garzik * 5188c6fd2807SJeff Garzik * Test whether SCRs are accessible for @ap. 5189c6fd2807SJeff Garzik * 5190c6fd2807SJeff Garzik * LOCKING: 5191c6fd2807SJeff Garzik * None. 5192c6fd2807SJeff Garzik * 5193c6fd2807SJeff Garzik * RETURNS: 5194c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5195c6fd2807SJeff Garzik */ 5196c6fd2807SJeff Garzik int sata_scr_valid(struct ata_port *ap) 5197c6fd2807SJeff Garzik { 5198c6fd2807SJeff Garzik return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; 5199c6fd2807SJeff Garzik } 5200c6fd2807SJeff Garzik 5201c6fd2807SJeff Garzik /** 5202c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5203c6fd2807SJeff Garzik * @ap: ATA port to read SCR for 5204c6fd2807SJeff Garzik * @reg: SCR to read 5205c6fd2807SJeff Garzik * @val: Place to store read value 5206c6fd2807SJeff Garzik * 5207c6fd2807SJeff Garzik * Read SCR register @reg of @ap into *@val. This function is 5208c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5209c6fd2807SJeff Garzik * and the port implements ->scr_read. 5210c6fd2807SJeff Garzik * 5211c6fd2807SJeff Garzik * LOCKING: 5212c6fd2807SJeff Garzik * None. 5213c6fd2807SJeff Garzik * 5214c6fd2807SJeff Garzik * RETURNS: 5215c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5216c6fd2807SJeff Garzik */ 5217c6fd2807SJeff Garzik int sata_scr_read(struct ata_port *ap, int reg, u32 *val) 5218c6fd2807SJeff Garzik { 5219c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5220c6fd2807SJeff Garzik *val = ap->ops->scr_read(ap, reg); 5221c6fd2807SJeff Garzik return 0; 5222c6fd2807SJeff Garzik } 5223c6fd2807SJeff Garzik return -EOPNOTSUPP; 5224c6fd2807SJeff Garzik } 5225c6fd2807SJeff Garzik 5226c6fd2807SJeff Garzik /** 5227c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5228c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5229c6fd2807SJeff Garzik * @reg: SCR to write 5230c6fd2807SJeff Garzik * @val: value to write 5231c6fd2807SJeff Garzik * 5232c6fd2807SJeff Garzik * Write @val to SCR register @reg of @ap. This function is 5233c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5234c6fd2807SJeff Garzik * and the port implements ->scr_read. 5235c6fd2807SJeff Garzik * 5236c6fd2807SJeff Garzik * LOCKING: 5237c6fd2807SJeff Garzik * None. 5238c6fd2807SJeff Garzik * 5239c6fd2807SJeff Garzik * RETURNS: 5240c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5241c6fd2807SJeff Garzik */ 5242c6fd2807SJeff Garzik int sata_scr_write(struct ata_port *ap, int reg, u32 val) 5243c6fd2807SJeff Garzik { 5244c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5245c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5246c6fd2807SJeff Garzik return 0; 5247c6fd2807SJeff Garzik } 5248c6fd2807SJeff Garzik return -EOPNOTSUPP; 5249c6fd2807SJeff Garzik } 5250c6fd2807SJeff Garzik 5251c6fd2807SJeff Garzik /** 5252c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5253c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5254c6fd2807SJeff Garzik * @reg: SCR to write 5255c6fd2807SJeff Garzik * @val: value to write 5256c6fd2807SJeff Garzik * 5257c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5258c6fd2807SJeff Garzik * function performs flush after writing to the register. 5259c6fd2807SJeff Garzik * 5260c6fd2807SJeff Garzik * LOCKING: 5261c6fd2807SJeff Garzik * None. 5262c6fd2807SJeff Garzik * 5263c6fd2807SJeff Garzik * RETURNS: 5264c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5265c6fd2807SJeff Garzik */ 5266c6fd2807SJeff Garzik int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) 5267c6fd2807SJeff Garzik { 5268c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5269c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5270c6fd2807SJeff Garzik ap->ops->scr_read(ap, reg); 5271c6fd2807SJeff Garzik return 0; 5272c6fd2807SJeff Garzik } 5273c6fd2807SJeff Garzik return -EOPNOTSUPP; 5274c6fd2807SJeff Garzik } 5275c6fd2807SJeff Garzik 5276c6fd2807SJeff Garzik /** 5277c6fd2807SJeff Garzik * ata_port_online - test whether the given port is online 5278c6fd2807SJeff Garzik * @ap: ATA port to test 5279c6fd2807SJeff Garzik * 5280c6fd2807SJeff Garzik * Test whether @ap is online. Note that this function returns 0 5281c6fd2807SJeff Garzik * if online status of @ap cannot be obtained, so 5282c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5283c6fd2807SJeff Garzik * 5284c6fd2807SJeff Garzik * LOCKING: 5285c6fd2807SJeff Garzik * None. 5286c6fd2807SJeff Garzik * 5287c6fd2807SJeff Garzik * RETURNS: 5288c6fd2807SJeff Garzik * 1 if the port online status is available and online. 5289c6fd2807SJeff Garzik */ 5290c6fd2807SJeff Garzik int ata_port_online(struct ata_port *ap) 5291c6fd2807SJeff Garzik { 5292c6fd2807SJeff Garzik u32 sstatus; 5293c6fd2807SJeff Garzik 5294c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) 5295c6fd2807SJeff Garzik return 1; 5296c6fd2807SJeff Garzik return 0; 5297c6fd2807SJeff Garzik } 5298c6fd2807SJeff Garzik 5299c6fd2807SJeff Garzik /** 5300c6fd2807SJeff Garzik * ata_port_offline - test whether the given port is offline 5301c6fd2807SJeff Garzik * @ap: ATA port to test 5302c6fd2807SJeff Garzik * 5303c6fd2807SJeff Garzik * Test whether @ap is offline. Note that this function returns 5304c6fd2807SJeff Garzik * 0 if offline status of @ap cannot be obtained, so 5305c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5306c6fd2807SJeff Garzik * 5307c6fd2807SJeff Garzik * LOCKING: 5308c6fd2807SJeff Garzik * None. 5309c6fd2807SJeff Garzik * 5310c6fd2807SJeff Garzik * RETURNS: 5311c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 5312c6fd2807SJeff Garzik */ 5313c6fd2807SJeff Garzik int ata_port_offline(struct ata_port *ap) 5314c6fd2807SJeff Garzik { 5315c6fd2807SJeff Garzik u32 sstatus; 5316c6fd2807SJeff Garzik 5317c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) 5318c6fd2807SJeff Garzik return 1; 5319c6fd2807SJeff Garzik return 0; 5320c6fd2807SJeff Garzik } 5321c6fd2807SJeff Garzik 5322c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 5323c6fd2807SJeff Garzik { 5324c6fd2807SJeff Garzik unsigned int err_mask; 5325c6fd2807SJeff Garzik u8 cmd; 5326c6fd2807SJeff Garzik 5327c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 5328c6fd2807SJeff Garzik return 0; 5329c6fd2807SJeff Garzik 53306fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 5331c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 5332c6fd2807SJeff Garzik else 5333c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 5334c6fd2807SJeff Garzik 5335c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 5336c6fd2807SJeff Garzik if (err_mask) { 5337c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 5338c6fd2807SJeff Garzik return -EIO; 5339c6fd2807SJeff Garzik } 5340c6fd2807SJeff Garzik 5341c6fd2807SJeff Garzik return 0; 5342c6fd2807SJeff Garzik } 5343c6fd2807SJeff Garzik 5344cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5345cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5346cca3974eSJeff Garzik int wait) 5347c6fd2807SJeff Garzik { 5348c6fd2807SJeff Garzik unsigned long flags; 5349c6fd2807SJeff Garzik int i, rc; 5350c6fd2807SJeff Garzik 5351cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5352cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5353c6fd2807SJeff Garzik 5354c6fd2807SJeff Garzik /* Previous resume operation might still be in 5355c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5356c6fd2807SJeff Garzik */ 5357c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5358c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5359c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5360c6fd2807SJeff Garzik } 5361c6fd2807SJeff Garzik 5362c6fd2807SJeff Garzik /* request PM ops to EH */ 5363c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5364c6fd2807SJeff Garzik 5365c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5366c6fd2807SJeff Garzik if (wait) { 5367c6fd2807SJeff Garzik rc = 0; 5368c6fd2807SJeff Garzik ap->pm_result = &rc; 5369c6fd2807SJeff Garzik } 5370c6fd2807SJeff Garzik 5371c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5372c6fd2807SJeff Garzik ap->eh_info.action |= action; 5373c6fd2807SJeff Garzik ap->eh_info.flags |= ehi_flags; 5374c6fd2807SJeff Garzik 5375c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5376c6fd2807SJeff Garzik 5377c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5378c6fd2807SJeff Garzik 5379c6fd2807SJeff Garzik /* wait and check result */ 5380c6fd2807SJeff Garzik if (wait) { 5381c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5382c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5383c6fd2807SJeff Garzik if (rc) 5384c6fd2807SJeff Garzik return rc; 5385c6fd2807SJeff Garzik } 5386c6fd2807SJeff Garzik } 5387c6fd2807SJeff Garzik 5388c6fd2807SJeff Garzik return 0; 5389c6fd2807SJeff Garzik } 5390c6fd2807SJeff Garzik 5391c6fd2807SJeff Garzik /** 5392cca3974eSJeff Garzik * ata_host_suspend - suspend host 5393cca3974eSJeff Garzik * @host: host to suspend 5394c6fd2807SJeff Garzik * @mesg: PM message 5395c6fd2807SJeff Garzik * 5396cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5397c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5398c6fd2807SJeff Garzik * to finish. 5399c6fd2807SJeff Garzik * 5400c6fd2807SJeff Garzik * LOCKING: 5401c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5402c6fd2807SJeff Garzik * 5403c6fd2807SJeff Garzik * RETURNS: 5404c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5405c6fd2807SJeff Garzik */ 5406cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5407c6fd2807SJeff Garzik { 5408c6fd2807SJeff Garzik int i, j, rc; 5409c6fd2807SJeff Garzik 5410cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 5411c6fd2807SJeff Garzik if (rc) 5412c6fd2807SJeff Garzik goto fail; 5413c6fd2807SJeff Garzik 5414c6fd2807SJeff Garzik /* EH is quiescent now. Fail if we have any ready device. 5415c6fd2807SJeff Garzik * This happens if hotplug occurs between completion of device 5416c6fd2807SJeff Garzik * suspension and here. 5417c6fd2807SJeff Garzik */ 5418cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5419cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5420c6fd2807SJeff Garzik 5421c6fd2807SJeff Garzik for (j = 0; j < ATA_MAX_DEVICES; j++) { 5422c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[j]; 5423c6fd2807SJeff Garzik 5424c6fd2807SJeff Garzik if (ata_dev_ready(dev)) { 5425c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 5426c6fd2807SJeff Garzik "suspend failed, device %d " 5427c6fd2807SJeff Garzik "still active\n", dev->devno); 5428c6fd2807SJeff Garzik rc = -EBUSY; 5429c6fd2807SJeff Garzik goto fail; 5430c6fd2807SJeff Garzik } 5431c6fd2807SJeff Garzik } 5432c6fd2807SJeff Garzik } 5433c6fd2807SJeff Garzik 5434cca3974eSJeff Garzik host->dev->power.power_state = mesg; 5435c6fd2807SJeff Garzik return 0; 5436c6fd2807SJeff Garzik 5437c6fd2807SJeff Garzik fail: 5438cca3974eSJeff Garzik ata_host_resume(host); 5439c6fd2807SJeff Garzik return rc; 5440c6fd2807SJeff Garzik } 5441c6fd2807SJeff Garzik 5442c6fd2807SJeff Garzik /** 5443cca3974eSJeff Garzik * ata_host_resume - resume host 5444cca3974eSJeff Garzik * @host: host to resume 5445c6fd2807SJeff Garzik * 5446cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5447c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5448c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5449c6fd2807SJeff Garzik * 5450c6fd2807SJeff Garzik * LOCKING: 5451c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5452c6fd2807SJeff Garzik */ 5453cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5454c6fd2807SJeff Garzik { 5455cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 5456c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 5457cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 5458c6fd2807SJeff Garzik } 5459c6fd2807SJeff Garzik 5460c6fd2807SJeff Garzik /** 5461c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5462c6fd2807SJeff Garzik * @ap: Port to initialize 5463c6fd2807SJeff Garzik * 5464c6fd2807SJeff Garzik * Called just after data structures for each port are 5465c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5466c6fd2807SJeff Garzik * 5467c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5468c6fd2807SJeff Garzik * 5469c6fd2807SJeff Garzik * LOCKING: 5470c6fd2807SJeff Garzik * Inherited from caller. 5471c6fd2807SJeff Garzik */ 5472c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 5473c6fd2807SJeff Garzik { 5474c6fd2807SJeff Garzik struct device *dev = ap->dev; 5475c6fd2807SJeff Garzik int rc; 5476c6fd2807SJeff Garzik 5477f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 5478f0d36efdSTejun Heo GFP_KERNEL); 5479c6fd2807SJeff Garzik if (!ap->prd) 5480c6fd2807SJeff Garzik return -ENOMEM; 5481c6fd2807SJeff Garzik 5482c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 5483f0d36efdSTejun Heo if (rc) 5484c6fd2807SJeff Garzik return rc; 5485c6fd2807SJeff Garzik 5486f0d36efdSTejun Heo DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, 5487f0d36efdSTejun Heo (unsigned long long)ap->prd_dma); 5488c6fd2807SJeff Garzik return 0; 5489c6fd2807SJeff Garzik } 5490c6fd2807SJeff Garzik 5491c6fd2807SJeff Garzik /** 5492c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5493c6fd2807SJeff Garzik * @dev: Device structure to initialize 5494c6fd2807SJeff Garzik * 5495c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5496c6fd2807SJeff Garzik * 5497c6fd2807SJeff Garzik * LOCKING: 5498c6fd2807SJeff Garzik * Inherited from caller. 5499c6fd2807SJeff Garzik */ 5500c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5501c6fd2807SJeff Garzik { 5502c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5503c6fd2807SJeff Garzik unsigned long flags; 5504c6fd2807SJeff Garzik 5505c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 5506c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5507c6fd2807SJeff Garzik 5508c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 5509c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 5510cca3974eSJeff Garzik * host lock. 5511c6fd2807SJeff Garzik */ 5512c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5513c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 5514c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5515c6fd2807SJeff Garzik 5516c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 5517c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 5518c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 5519c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 5520c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 5521c6fd2807SJeff Garzik } 5522c6fd2807SJeff Garzik 5523c6fd2807SJeff Garzik /** 5524c6fd2807SJeff Garzik * ata_port_init - Initialize an ata_port structure 5525c6fd2807SJeff Garzik * @ap: Structure to initialize 5526cca3974eSJeff Garzik * @host: Collection of hosts to which @ap belongs 5527c6fd2807SJeff Garzik * @ent: Probe information provided by low-level driver 5528c6fd2807SJeff Garzik * @port_no: Port number associated with this ata_port 5529c6fd2807SJeff Garzik * 5530c6fd2807SJeff Garzik * Initialize a new ata_port structure. 5531c6fd2807SJeff Garzik * 5532c6fd2807SJeff Garzik * LOCKING: 5533c6fd2807SJeff Garzik * Inherited from caller. 5534c6fd2807SJeff Garzik */ 5535cca3974eSJeff Garzik void ata_port_init(struct ata_port *ap, struct ata_host *host, 5536c6fd2807SJeff Garzik const struct ata_probe_ent *ent, unsigned int port_no) 5537c6fd2807SJeff Garzik { 5538c6fd2807SJeff Garzik unsigned int i; 5539c6fd2807SJeff Garzik 5540cca3974eSJeff Garzik ap->lock = &host->lock; 5541c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 554244877b4eSTejun Heo ap->print_id = ata_print_id++; 5543c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 5544cca3974eSJeff Garzik ap->host = host; 5545c6fd2807SJeff Garzik ap->dev = ent->dev; 5546c6fd2807SJeff Garzik ap->port_no = port_no; 5547fea63e38STejun Heo if (port_no == 1 && ent->pinfo2) { 5548fea63e38STejun Heo ap->pio_mask = ent->pinfo2->pio_mask; 5549fea63e38STejun Heo ap->mwdma_mask = ent->pinfo2->mwdma_mask; 5550fea63e38STejun Heo ap->udma_mask = ent->pinfo2->udma_mask; 5551fea63e38STejun Heo ap->flags |= ent->pinfo2->flags; 5552fea63e38STejun Heo ap->ops = ent->pinfo2->port_ops; 5553fea63e38STejun Heo } else { 5554c6fd2807SJeff Garzik ap->pio_mask = ent->pio_mask; 5555c6fd2807SJeff Garzik ap->mwdma_mask = ent->mwdma_mask; 5556c6fd2807SJeff Garzik ap->udma_mask = ent->udma_mask; 5557cca3974eSJeff Garzik ap->flags |= ent->port_flags; 5558c6fd2807SJeff Garzik ap->ops = ent->port_ops; 5559fea63e38STejun Heo } 5560c6fd2807SJeff Garzik ap->hw_sata_spd_limit = UINT_MAX; 5561c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 5562c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 5563c6fd2807SJeff Garzik 5564c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 5565c6fd2807SJeff Garzik /* turn on all debugging levels */ 5566c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 5567c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 5568c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 5569c6fd2807SJeff Garzik #else 5570c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 5571c6fd2807SJeff Garzik #endif 5572c6fd2807SJeff Garzik 557365f27f38SDavid Howells INIT_DELAYED_WORK(&ap->port_task, NULL); 557465f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 557565f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5576c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 5577c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 5578c6fd2807SJeff Garzik 5579c6fd2807SJeff Garzik /* set cable type */ 5580c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 5581c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA) 5582c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 5583c6fd2807SJeff Garzik 5584c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 5585c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[i]; 5586c6fd2807SJeff Garzik dev->ap = ap; 5587c6fd2807SJeff Garzik dev->devno = i; 5588c6fd2807SJeff Garzik ata_dev_init(dev); 5589c6fd2807SJeff Garzik } 5590c6fd2807SJeff Garzik 5591c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5592c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 5593c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 5594c6fd2807SJeff Garzik #endif 5595c6fd2807SJeff Garzik 5596c6fd2807SJeff Garzik memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); 5597c6fd2807SJeff Garzik } 5598c6fd2807SJeff Garzik 5599c6fd2807SJeff Garzik /** 5600c6fd2807SJeff Garzik * ata_port_init_shost - Initialize SCSI host associated with ATA port 5601c6fd2807SJeff Garzik * @ap: ATA port to initialize SCSI host for 5602c6fd2807SJeff Garzik * @shost: SCSI host associated with @ap 5603c6fd2807SJeff Garzik * 5604c6fd2807SJeff Garzik * Initialize SCSI host @shost associated with ATA port @ap. 5605c6fd2807SJeff Garzik * 5606c6fd2807SJeff Garzik * LOCKING: 5607c6fd2807SJeff Garzik * Inherited from caller. 5608c6fd2807SJeff Garzik */ 5609c6fd2807SJeff Garzik static void ata_port_init_shost(struct ata_port *ap, struct Scsi_Host *shost) 5610c6fd2807SJeff Garzik { 5611cca3974eSJeff Garzik ap->scsi_host = shost; 5612c6fd2807SJeff Garzik 561344877b4eSTejun Heo shost->unique_id = ap->print_id; 5614c6fd2807SJeff Garzik shost->max_id = 16; 5615c6fd2807SJeff Garzik shost->max_lun = 1; 5616c6fd2807SJeff Garzik shost->max_channel = 1; 5617c6fd2807SJeff Garzik shost->max_cmd_len = 12; 5618c6fd2807SJeff Garzik } 5619c6fd2807SJeff Garzik 5620c6fd2807SJeff Garzik /** 5621c6fd2807SJeff Garzik * ata_port_add - Attach low-level ATA driver to system 5622c6fd2807SJeff Garzik * @ent: Information provided by low-level driver 5623cca3974eSJeff Garzik * @host: Collections of ports to which we add 5624c6fd2807SJeff Garzik * @port_no: Port number associated with this host 5625c6fd2807SJeff Garzik * 5626c6fd2807SJeff Garzik * Attach low-level ATA driver to system. 5627c6fd2807SJeff Garzik * 5628c6fd2807SJeff Garzik * LOCKING: 5629c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5630c6fd2807SJeff Garzik * 5631c6fd2807SJeff Garzik * RETURNS: 5632c6fd2807SJeff Garzik * New ata_port on success, for NULL on error. 5633c6fd2807SJeff Garzik */ 5634c6fd2807SJeff Garzik static struct ata_port * ata_port_add(const struct ata_probe_ent *ent, 5635cca3974eSJeff Garzik struct ata_host *host, 5636c6fd2807SJeff Garzik unsigned int port_no) 5637c6fd2807SJeff Garzik { 5638c6fd2807SJeff Garzik struct Scsi_Host *shost; 5639c6fd2807SJeff Garzik struct ata_port *ap; 5640c6fd2807SJeff Garzik 5641c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 5642c6fd2807SJeff Garzik 5643c6fd2807SJeff Garzik if (!ent->port_ops->error_handler && 5644cca3974eSJeff Garzik !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { 5645c6fd2807SJeff Garzik printk(KERN_ERR "ata%u: no reset mechanism available\n", 5646c6fd2807SJeff Garzik port_no); 5647c6fd2807SJeff Garzik return NULL; 5648c6fd2807SJeff Garzik } 5649c6fd2807SJeff Garzik 5650c6fd2807SJeff Garzik shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); 5651c6fd2807SJeff Garzik if (!shost) 5652c6fd2807SJeff Garzik return NULL; 5653c6fd2807SJeff Garzik 5654c6fd2807SJeff Garzik shost->transportt = &ata_scsi_transport_template; 5655c6fd2807SJeff Garzik 5656c6fd2807SJeff Garzik ap = ata_shost_to_port(shost); 5657c6fd2807SJeff Garzik 5658cca3974eSJeff Garzik ata_port_init(ap, host, ent, port_no); 5659c6fd2807SJeff Garzik ata_port_init_shost(ap, shost); 5660c6fd2807SJeff Garzik 5661c6fd2807SJeff Garzik return ap; 5662c6fd2807SJeff Garzik } 5663c6fd2807SJeff Garzik 5664f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 5665f0d36efdSTejun Heo { 5666f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 5667f0d36efdSTejun Heo int i; 5668f0d36efdSTejun Heo 5669f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 5670f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 5671f0d36efdSTejun Heo 5672f0d36efdSTejun Heo if (!ap) 5673f0d36efdSTejun Heo continue; 5674f0d36efdSTejun Heo 5675f0d36efdSTejun Heo if (ap->ops->port_stop) 5676f0d36efdSTejun Heo ap->ops->port_stop(ap); 5677f0d36efdSTejun Heo 5678f0d36efdSTejun Heo scsi_host_put(ap->scsi_host); 5679f0d36efdSTejun Heo } 5680f0d36efdSTejun Heo 5681f0d36efdSTejun Heo if (host->ops->host_stop) 5682f0d36efdSTejun Heo host->ops->host_stop(host); 56831aa56ccaSTejun Heo 56841aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 5685f0d36efdSTejun Heo } 5686f0d36efdSTejun Heo 5687c6fd2807SJeff Garzik /** 5688cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 5689cca3974eSJeff Garzik * @host: host to initialize 5690cca3974eSJeff Garzik * @dev: device host is attached to 5691cca3974eSJeff Garzik * @flags: host flags 5692c6fd2807SJeff Garzik * @ops: port_ops 5693c6fd2807SJeff Garzik * 5694c6fd2807SJeff Garzik * LOCKING: 5695c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5696c6fd2807SJeff Garzik * 5697c6fd2807SJeff Garzik */ 5698c6fd2807SJeff Garzik 5699cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 5700cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 5701c6fd2807SJeff Garzik { 5702cca3974eSJeff Garzik spin_lock_init(&host->lock); 5703cca3974eSJeff Garzik host->dev = dev; 5704cca3974eSJeff Garzik host->flags = flags; 5705cca3974eSJeff Garzik host->ops = ops; 5706c6fd2807SJeff Garzik } 5707c6fd2807SJeff Garzik 5708c6fd2807SJeff Garzik /** 5709c6fd2807SJeff Garzik * ata_device_add - Register hardware device with ATA and SCSI layers 5710c6fd2807SJeff Garzik * @ent: Probe information describing hardware device to be registered 5711c6fd2807SJeff Garzik * 5712c6fd2807SJeff Garzik * This function processes the information provided in the probe 5713c6fd2807SJeff Garzik * information struct @ent, allocates the necessary ATA and SCSI 5714c6fd2807SJeff Garzik * host information structures, initializes them, and registers 5715c6fd2807SJeff Garzik * everything with requisite kernel subsystems. 5716c6fd2807SJeff Garzik * 5717c6fd2807SJeff Garzik * This function requests irqs, probes the ATA bus, and probes 5718c6fd2807SJeff Garzik * the SCSI bus. 5719c6fd2807SJeff Garzik * 5720c6fd2807SJeff Garzik * LOCKING: 5721c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5722c6fd2807SJeff Garzik * 5723c6fd2807SJeff Garzik * RETURNS: 5724c6fd2807SJeff Garzik * Number of ports registered. Zero on error (no ports registered). 5725c6fd2807SJeff Garzik */ 5726c6fd2807SJeff Garzik int ata_device_add(const struct ata_probe_ent *ent) 5727c6fd2807SJeff Garzik { 5728c6fd2807SJeff Garzik unsigned int i; 5729c6fd2807SJeff Garzik struct device *dev = ent->dev; 5730cca3974eSJeff Garzik struct ata_host *host; 5731c6fd2807SJeff Garzik int rc; 5732c6fd2807SJeff Garzik 5733c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 573402f076aaSAlan Cox 573502f076aaSAlan Cox if (ent->irq == 0) { 573602f076aaSAlan Cox dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n"); 573702f076aaSAlan Cox return 0; 573802f076aaSAlan Cox } 5739f0d36efdSTejun Heo 5740f0d36efdSTejun Heo if (!devres_open_group(dev, ata_device_add, GFP_KERNEL)) 5741f0d36efdSTejun Heo return 0; 5742f0d36efdSTejun Heo 5743c6fd2807SJeff Garzik /* alloc a container for our list of ATA ports (buses) */ 5744f0d36efdSTejun Heo host = devres_alloc(ata_host_release, sizeof(struct ata_host) + 5745c6fd2807SJeff Garzik (ent->n_ports * sizeof(void *)), GFP_KERNEL); 5746cca3974eSJeff Garzik if (!host) 5747f0d36efdSTejun Heo goto err_out; 5748f0d36efdSTejun Heo devres_add(dev, host); 5749f0d36efdSTejun Heo dev_set_drvdata(dev, host); 5750c6fd2807SJeff Garzik 5751cca3974eSJeff Garzik ata_host_init(host, dev, ent->_host_flags, ent->port_ops); 5752cca3974eSJeff Garzik host->n_ports = ent->n_ports; 5753cca3974eSJeff Garzik host->irq = ent->irq; 5754cca3974eSJeff Garzik host->irq2 = ent->irq2; 57550d5ff566STejun Heo host->iomap = ent->iomap; 5756cca3974eSJeff Garzik host->private_data = ent->private_data; 5757c6fd2807SJeff Garzik 5758c6fd2807SJeff Garzik /* register each port bound to this device */ 5759cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5760c6fd2807SJeff Garzik struct ata_port *ap; 5761c6fd2807SJeff Garzik unsigned long xfer_mode_mask; 5762c6fd2807SJeff Garzik int irq_line = ent->irq; 5763c6fd2807SJeff Garzik 5764cca3974eSJeff Garzik ap = ata_port_add(ent, host, i); 5765c38778c3SDave Jones host->ports[i] = ap; 5766c6fd2807SJeff Garzik if (!ap) 5767c6fd2807SJeff Garzik goto err_out; 5768c6fd2807SJeff Garzik 5769c6fd2807SJeff Garzik /* dummy? */ 5770c6fd2807SJeff Garzik if (ent->dummy_port_mask & (1 << i)) { 5771c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 5772c6fd2807SJeff Garzik ap->ops = &ata_dummy_port_ops; 5773c6fd2807SJeff Garzik continue; 5774c6fd2807SJeff Garzik } 5775c6fd2807SJeff Garzik 5776c6fd2807SJeff Garzik /* start port */ 5777c6fd2807SJeff Garzik rc = ap->ops->port_start(ap); 5778c6fd2807SJeff Garzik if (rc) { 5779cca3974eSJeff Garzik host->ports[i] = NULL; 5780cca3974eSJeff Garzik scsi_host_put(ap->scsi_host); 5781c6fd2807SJeff Garzik goto err_out; 5782c6fd2807SJeff Garzik } 5783c6fd2807SJeff Garzik 5784c6fd2807SJeff Garzik /* Report the secondary IRQ for second channel legacy */ 5785c6fd2807SJeff Garzik if (i == 1 && ent->irq2) 5786c6fd2807SJeff Garzik irq_line = ent->irq2; 5787c6fd2807SJeff Garzik 5788c6fd2807SJeff Garzik xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | 5789c6fd2807SJeff Garzik (ap->mwdma_mask << ATA_SHIFT_MWDMA) | 5790c6fd2807SJeff Garzik (ap->pio_mask << ATA_SHIFT_PIO); 5791c6fd2807SJeff Garzik 5792c6fd2807SJeff Garzik /* print per-port info to dmesg */ 57930d5ff566STejun Heo ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " 57940d5ff566STejun Heo "ctl 0x%p bmdma 0x%p irq %d\n", 5795c6fd2807SJeff Garzik ap->flags & ATA_FLAG_SATA ? 'S' : 'P', 5796c6fd2807SJeff Garzik ata_mode_string(xfer_mode_mask), 5797c6fd2807SJeff Garzik ap->ioaddr.cmd_addr, 5798c6fd2807SJeff Garzik ap->ioaddr.ctl_addr, 5799c6fd2807SJeff Garzik ap->ioaddr.bmdma_addr, 5800c6fd2807SJeff Garzik irq_line); 5801c6fd2807SJeff Garzik 58020f0a3ad3STejun Heo /* freeze port before requesting IRQ */ 58030f0a3ad3STejun Heo ata_eh_freeze_port(ap); 5804c6fd2807SJeff Garzik } 5805c6fd2807SJeff Garzik 5806c6fd2807SJeff Garzik /* obtain irq, that may be shared between channels */ 5807f0d36efdSTejun Heo rc = devm_request_irq(dev, ent->irq, ent->port_ops->irq_handler, 5808f0d36efdSTejun Heo ent->irq_flags, DRV_NAME, host); 5809c6fd2807SJeff Garzik if (rc) { 5810c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5811c6fd2807SJeff Garzik ent->irq, rc); 5812c6fd2807SJeff Garzik goto err_out; 5813c6fd2807SJeff Garzik } 5814c6fd2807SJeff Garzik 5815c6fd2807SJeff Garzik /* do we have a second IRQ for the other channel, eg legacy mode */ 5816c6fd2807SJeff Garzik if (ent->irq2) { 5817c6fd2807SJeff Garzik /* We will get weird core code crashes later if this is true 5818c6fd2807SJeff Garzik so trap it now */ 5819c6fd2807SJeff Garzik BUG_ON(ent->irq == ent->irq2); 5820c6fd2807SJeff Garzik 5821f0d36efdSTejun Heo rc = devm_request_irq(dev, ent->irq2, 5822f0d36efdSTejun Heo ent->port_ops->irq_handler, ent->irq_flags, 5823cca3974eSJeff Garzik DRV_NAME, host); 5824c6fd2807SJeff Garzik if (rc) { 5825c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5826c6fd2807SJeff Garzik ent->irq2, rc); 5827f0d36efdSTejun Heo goto err_out; 5828c6fd2807SJeff Garzik } 5829c6fd2807SJeff Garzik } 5830c6fd2807SJeff Garzik 5831f0d36efdSTejun Heo /* resource acquisition complete */ 5832b878ca5dSTejun Heo devres_remove_group(dev, ata_device_add); 5833f0d36efdSTejun Heo 5834c6fd2807SJeff Garzik /* perform each probe synchronously */ 5835c6fd2807SJeff Garzik DPRINTK("probe begin\n"); 5836cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5837cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5838c6fd2807SJeff Garzik u32 scontrol; 5839c6fd2807SJeff Garzik int rc; 5840c6fd2807SJeff Garzik 5841c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 5842c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { 5843c6fd2807SJeff Garzik int spd = (scontrol >> 4) & 0xf; 5844c6fd2807SJeff Garzik ap->hw_sata_spd_limit &= (1 << spd) - 1; 5845c6fd2807SJeff Garzik } 5846c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5847c6fd2807SJeff Garzik 5848cca3974eSJeff Garzik rc = scsi_add_host(ap->scsi_host, dev); 5849c6fd2807SJeff Garzik if (rc) { 5850c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n"); 5851c6fd2807SJeff Garzik /* FIXME: do something useful here */ 5852c6fd2807SJeff Garzik /* FIXME: handle unconditional calls to 5853c6fd2807SJeff Garzik * scsi_scan_host and ata_host_remove, below, 5854c6fd2807SJeff Garzik * at the very least 5855c6fd2807SJeff Garzik */ 5856c6fd2807SJeff Garzik } 5857c6fd2807SJeff Garzik 5858c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5859c6fd2807SJeff Garzik struct ata_eh_info *ehi = &ap->eh_info; 5860c6fd2807SJeff Garzik unsigned long flags; 5861c6fd2807SJeff Garzik 5862c6fd2807SJeff Garzik ata_port_probe(ap); 5863c6fd2807SJeff Garzik 5864c6fd2807SJeff Garzik /* kick EH for boot probing */ 5865c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5866c6fd2807SJeff Garzik 5867c6fd2807SJeff Garzik ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; 5868c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 5869c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 5870c6fd2807SJeff Garzik 5871c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 5872c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5873c6fd2807SJeff Garzik 5874c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5875c6fd2807SJeff Garzik 5876c6fd2807SJeff Garzik /* wait for EH to finish */ 5877c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5878c6fd2807SJeff Garzik } else { 587944877b4eSTejun Heo DPRINTK("ata%u: bus probe begin\n", ap->print_id); 5880c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 588144877b4eSTejun Heo DPRINTK("ata%u: bus probe end\n", ap->print_id); 5882c6fd2807SJeff Garzik 5883c6fd2807SJeff Garzik if (rc) { 5884c6fd2807SJeff Garzik /* FIXME: do something useful here? 5885c6fd2807SJeff Garzik * Current libata behavior will 5886c6fd2807SJeff Garzik * tear down everything when 5887c6fd2807SJeff Garzik * the module is removed 5888c6fd2807SJeff Garzik * or the h/w is unplugged. 5889c6fd2807SJeff Garzik */ 5890c6fd2807SJeff Garzik } 5891c6fd2807SJeff Garzik } 5892c6fd2807SJeff Garzik } 5893c6fd2807SJeff Garzik 5894c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 5895c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 5896cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5897cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5898c6fd2807SJeff Garzik 5899c6fd2807SJeff Garzik ata_scsi_scan_host(ap); 5900c6fd2807SJeff Garzik } 5901c6fd2807SJeff Garzik 5902c6fd2807SJeff Garzik VPRINTK("EXIT, returning %u\n", ent->n_ports); 5903c6fd2807SJeff Garzik return ent->n_ports; /* success */ 5904c6fd2807SJeff Garzik 5905c6fd2807SJeff Garzik err_out: 5906f0d36efdSTejun Heo devres_release_group(dev, ata_device_add); 5907f0d36efdSTejun Heo VPRINTK("EXIT, returning %d\n", rc); 5908c6fd2807SJeff Garzik return 0; 5909c6fd2807SJeff Garzik } 5910c6fd2807SJeff Garzik 5911c6fd2807SJeff Garzik /** 5912c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 5913c6fd2807SJeff Garzik * @ap: ATA port to be detached 5914c6fd2807SJeff Garzik * 5915c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 5916c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 5917c6fd2807SJeff Garzik * be quiescent on return from this function. 5918c6fd2807SJeff Garzik * 5919c6fd2807SJeff Garzik * LOCKING: 5920c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5921c6fd2807SJeff Garzik */ 5922c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 5923c6fd2807SJeff Garzik { 5924c6fd2807SJeff Garzik unsigned long flags; 5925c6fd2807SJeff Garzik int i; 5926c6fd2807SJeff Garzik 5927c6fd2807SJeff Garzik if (!ap->ops->error_handler) 5928c6fd2807SJeff Garzik goto skip_eh; 5929c6fd2807SJeff Garzik 5930c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 5931c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5932c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 5933c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5934c6fd2807SJeff Garzik 5935c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5936c6fd2807SJeff Garzik 5937c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 5938c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 5939c6fd2807SJeff Garzik */ 5940c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5941c6fd2807SJeff Garzik 5942c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 5943c6fd2807SJeff Garzik ata_dev_disable(&ap->device[i]); 5944c6fd2807SJeff Garzik 5945c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5946c6fd2807SJeff Garzik 5947c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 5948c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 5949c6fd2807SJeff Garzik * target. 5950c6fd2807SJeff Garzik */ 5951c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5952c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 5953c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5954c6fd2807SJeff Garzik 5955c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5956c6fd2807SJeff Garzik 5957c6fd2807SJeff Garzik /* Flush hotplug task. The sequence is similar to 5958c6fd2807SJeff Garzik * ata_port_flush_task(). 5959c6fd2807SJeff Garzik */ 5960c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5961c6fd2807SJeff Garzik cancel_delayed_work(&ap->hotplug_task); 5962c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5963c6fd2807SJeff Garzik 5964c6fd2807SJeff Garzik skip_eh: 5965c6fd2807SJeff Garzik /* remove the associated SCSI host */ 5966cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 5967c6fd2807SJeff Garzik } 5968c6fd2807SJeff Garzik 5969c6fd2807SJeff Garzik /** 59700529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 59710529c159STejun Heo * @host: Host to detach 59720529c159STejun Heo * 59730529c159STejun Heo * Detach all ports of @host. 59740529c159STejun Heo * 59750529c159STejun Heo * LOCKING: 59760529c159STejun Heo * Kernel thread context (may sleep). 59770529c159STejun Heo */ 59780529c159STejun Heo void ata_host_detach(struct ata_host *host) 59790529c159STejun Heo { 59800529c159STejun Heo int i; 59810529c159STejun Heo 59820529c159STejun Heo for (i = 0; i < host->n_ports; i++) 59830529c159STejun Heo ata_port_detach(host->ports[i]); 59840529c159STejun Heo } 59850529c159STejun Heo 5986c6fd2807SJeff Garzik struct ata_probe_ent * 5987c6fd2807SJeff Garzik ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) 5988c6fd2807SJeff Garzik { 5989c6fd2807SJeff Garzik struct ata_probe_ent *probe_ent; 5990c6fd2807SJeff Garzik 5991f0d36efdSTejun Heo probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL); 5992c6fd2807SJeff Garzik if (!probe_ent) { 5993c6fd2807SJeff Garzik printk(KERN_ERR DRV_NAME "(%s): out of memory\n", 5994c6fd2807SJeff Garzik kobject_name(&(dev->kobj))); 5995c6fd2807SJeff Garzik return NULL; 5996c6fd2807SJeff Garzik } 5997c6fd2807SJeff Garzik 5998c6fd2807SJeff Garzik INIT_LIST_HEAD(&probe_ent->node); 5999c6fd2807SJeff Garzik probe_ent->dev = dev; 6000c6fd2807SJeff Garzik 6001c6fd2807SJeff Garzik probe_ent->sht = port->sht; 6002cca3974eSJeff Garzik probe_ent->port_flags = port->flags; 6003c6fd2807SJeff Garzik probe_ent->pio_mask = port->pio_mask; 6004c6fd2807SJeff Garzik probe_ent->mwdma_mask = port->mwdma_mask; 6005c6fd2807SJeff Garzik probe_ent->udma_mask = port->udma_mask; 6006c6fd2807SJeff Garzik probe_ent->port_ops = port->port_ops; 6007d639ca94SJeff Garzik probe_ent->private_data = port->private_data; 6008c6fd2807SJeff Garzik 6009c6fd2807SJeff Garzik return probe_ent; 6010c6fd2807SJeff Garzik } 6011c6fd2807SJeff Garzik 6012c6fd2807SJeff Garzik /** 6013c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 6014c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 6015c6fd2807SJeff Garzik * 6016c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 6017c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 6018c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 6019c6fd2807SJeff Garzik * relative to cmd_addr. 6020c6fd2807SJeff Garzik * 6021c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 6022c6fd2807SJeff Garzik */ 6023c6fd2807SJeff Garzik 6024c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 6025c6fd2807SJeff Garzik { 6026c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 6027c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 6028c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 6029c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 6030c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 6031c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 6032c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 6033c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 6034c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 6035c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 6036c6fd2807SJeff Garzik } 6037c6fd2807SJeff Garzik 6038c6fd2807SJeff Garzik 6039c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6040c6fd2807SJeff Garzik 6041c6fd2807SJeff Garzik /** 6042c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 6043c6fd2807SJeff Garzik * @pdev: PCI device that was removed 6044c6fd2807SJeff Garzik * 6045b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 6046b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 6047b878ca5dSTejun Heo * release is handled via devres. 6048c6fd2807SJeff Garzik * 6049c6fd2807SJeff Garzik * LOCKING: 6050c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6051c6fd2807SJeff Garzik */ 6052c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 6053c6fd2807SJeff Garzik { 6054c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 6055cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 6056c6fd2807SJeff Garzik 6057f0d36efdSTejun Heo ata_host_detach(host); 6058c6fd2807SJeff Garzik } 6059c6fd2807SJeff Garzik 6060c6fd2807SJeff Garzik /* move to PCI subsystem */ 6061c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6062c6fd2807SJeff Garzik { 6063c6fd2807SJeff Garzik unsigned long tmp = 0; 6064c6fd2807SJeff Garzik 6065c6fd2807SJeff Garzik switch (bits->width) { 6066c6fd2807SJeff Garzik case 1: { 6067c6fd2807SJeff Garzik u8 tmp8 = 0; 6068c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 6069c6fd2807SJeff Garzik tmp = tmp8; 6070c6fd2807SJeff Garzik break; 6071c6fd2807SJeff Garzik } 6072c6fd2807SJeff Garzik case 2: { 6073c6fd2807SJeff Garzik u16 tmp16 = 0; 6074c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6075c6fd2807SJeff Garzik tmp = tmp16; 6076c6fd2807SJeff Garzik break; 6077c6fd2807SJeff Garzik } 6078c6fd2807SJeff Garzik case 4: { 6079c6fd2807SJeff Garzik u32 tmp32 = 0; 6080c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6081c6fd2807SJeff Garzik tmp = tmp32; 6082c6fd2807SJeff Garzik break; 6083c6fd2807SJeff Garzik } 6084c6fd2807SJeff Garzik 6085c6fd2807SJeff Garzik default: 6086c6fd2807SJeff Garzik return -EINVAL; 6087c6fd2807SJeff Garzik } 6088c6fd2807SJeff Garzik 6089c6fd2807SJeff Garzik tmp &= bits->mask; 6090c6fd2807SJeff Garzik 6091c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6092c6fd2807SJeff Garzik } 6093c6fd2807SJeff Garzik 6094c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6095c6fd2807SJeff Garzik { 6096c6fd2807SJeff Garzik pci_save_state(pdev); 6097c6fd2807SJeff Garzik pci_disable_device(pdev); 60984c90d971STejun Heo 60994c90d971STejun Heo if (mesg.event == PM_EVENT_SUSPEND) 6100c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6101c6fd2807SJeff Garzik } 6102c6fd2807SJeff Garzik 6103553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 6104c6fd2807SJeff Garzik { 6105553c4aa6STejun Heo int rc; 6106553c4aa6STejun Heo 6107c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6108c6fd2807SJeff Garzik pci_restore_state(pdev); 6109553c4aa6STejun Heo 6110f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 6111553c4aa6STejun Heo if (rc) { 6112553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 6113553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6114553c4aa6STejun Heo return rc; 6115553c4aa6STejun Heo } 6116553c4aa6STejun Heo 6117c6fd2807SJeff Garzik pci_set_master(pdev); 6118553c4aa6STejun Heo return 0; 6119c6fd2807SJeff Garzik } 6120c6fd2807SJeff Garzik 6121c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6122c6fd2807SJeff Garzik { 6123cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6124c6fd2807SJeff Garzik int rc = 0; 6125c6fd2807SJeff Garzik 6126cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6127c6fd2807SJeff Garzik if (rc) 6128c6fd2807SJeff Garzik return rc; 6129c6fd2807SJeff Garzik 6130c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6131c6fd2807SJeff Garzik 6132c6fd2807SJeff Garzik return 0; 6133c6fd2807SJeff Garzik } 6134c6fd2807SJeff Garzik 6135c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6136c6fd2807SJeff Garzik { 6137cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6138553c4aa6STejun Heo int rc; 6139c6fd2807SJeff Garzik 6140553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6141553c4aa6STejun Heo if (rc == 0) 6142cca3974eSJeff Garzik ata_host_resume(host); 6143553c4aa6STejun Heo return rc; 6144c6fd2807SJeff Garzik } 6145c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6146c6fd2807SJeff Garzik 6147c6fd2807SJeff Garzik 6148c6fd2807SJeff Garzik static int __init ata_init(void) 6149c6fd2807SJeff Garzik { 6150c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 6151c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6152c6fd2807SJeff Garzik if (!ata_wq) 6153c6fd2807SJeff Garzik return -ENOMEM; 6154c6fd2807SJeff Garzik 6155c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 6156c6fd2807SJeff Garzik if (!ata_aux_wq) { 6157c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6158c6fd2807SJeff Garzik return -ENOMEM; 6159c6fd2807SJeff Garzik } 6160c6fd2807SJeff Garzik 6161c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6162c6fd2807SJeff Garzik return 0; 6163c6fd2807SJeff Garzik } 6164c6fd2807SJeff Garzik 6165c6fd2807SJeff Garzik static void __exit ata_exit(void) 6166c6fd2807SJeff Garzik { 6167c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6168c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6169c6fd2807SJeff Garzik } 6170c6fd2807SJeff Garzik 6171a4625085SBrian King subsys_initcall(ata_init); 6172c6fd2807SJeff Garzik module_exit(ata_exit); 6173c6fd2807SJeff Garzik 6174c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6175c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6176c6fd2807SJeff Garzik 6177c6fd2807SJeff Garzik int ata_ratelimit(void) 6178c6fd2807SJeff Garzik { 6179c6fd2807SJeff Garzik int rc; 6180c6fd2807SJeff Garzik unsigned long flags; 6181c6fd2807SJeff Garzik 6182c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6183c6fd2807SJeff Garzik 6184c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6185c6fd2807SJeff Garzik rc = 1; 6186c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6187c6fd2807SJeff Garzik } else 6188c6fd2807SJeff Garzik rc = 0; 6189c6fd2807SJeff Garzik 6190c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6191c6fd2807SJeff Garzik 6192c6fd2807SJeff Garzik return rc; 6193c6fd2807SJeff Garzik } 6194c6fd2807SJeff Garzik 6195c6fd2807SJeff Garzik /** 6196c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6197c6fd2807SJeff Garzik * @reg: IO-mapped register 6198c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6199c6fd2807SJeff Garzik * @val: Wait condition 6200c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 6201c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 6202c6fd2807SJeff Garzik * 6203c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6204c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6205c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6206c6fd2807SJeff Garzik * 6207c6fd2807SJeff Garzik * (*@reg & mask) != val 6208c6fd2807SJeff Garzik * 6209c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6210c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6211c6fd2807SJeff Garzik * 6212c6fd2807SJeff Garzik * LOCKING: 6213c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6214c6fd2807SJeff Garzik * 6215c6fd2807SJeff Garzik * RETURNS: 6216c6fd2807SJeff Garzik * The final register value. 6217c6fd2807SJeff Garzik */ 6218c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6219c6fd2807SJeff Garzik unsigned long interval_msec, 6220c6fd2807SJeff Garzik unsigned long timeout_msec) 6221c6fd2807SJeff Garzik { 6222c6fd2807SJeff Garzik unsigned long timeout; 6223c6fd2807SJeff Garzik u32 tmp; 6224c6fd2807SJeff Garzik 6225c6fd2807SJeff Garzik tmp = ioread32(reg); 6226c6fd2807SJeff Garzik 6227c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6228c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6229c6fd2807SJeff Garzik * eat away the timeout. 6230c6fd2807SJeff Garzik */ 6231c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 6232c6fd2807SJeff Garzik 6233c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 6234c6fd2807SJeff Garzik msleep(interval_msec); 6235c6fd2807SJeff Garzik tmp = ioread32(reg); 6236c6fd2807SJeff Garzik } 6237c6fd2807SJeff Garzik 6238c6fd2807SJeff Garzik return tmp; 6239c6fd2807SJeff Garzik } 6240c6fd2807SJeff Garzik 6241c6fd2807SJeff Garzik /* 6242c6fd2807SJeff Garzik * Dummy port_ops 6243c6fd2807SJeff Garzik */ 6244c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 6245c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 6246c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 6247c6fd2807SJeff Garzik 6248c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 6249c6fd2807SJeff Garzik { 6250c6fd2807SJeff Garzik return ATA_DRDY; 6251c6fd2807SJeff Garzik } 6252c6fd2807SJeff Garzik 6253c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6254c6fd2807SJeff Garzik { 6255c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6256c6fd2807SJeff Garzik } 6257c6fd2807SJeff Garzik 6258c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 6259c6fd2807SJeff Garzik .port_disable = ata_port_disable, 6260c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 6261c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 6262c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 6263c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6264c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6265c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 6266c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 6267c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 6268c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 6269c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 6270c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 6271c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 6272c6fd2807SJeff Garzik }; 6273c6fd2807SJeff Garzik 6274c6fd2807SJeff Garzik /* 6275c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6276c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6277c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6278c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6279c6fd2807SJeff Garzik */ 6280c6fd2807SJeff Garzik 6281c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6282c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6283c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6284c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6285c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6286c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 6287cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6288c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_device_add); 62890529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6290c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6291c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 6292c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 6293c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6294c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6295c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 6296c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 6297c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 6298c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 6299c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 6300c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6301c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6302c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 6303c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 6304c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 6305c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 6306c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 63070d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 63080d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 6309c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 6310c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6311c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 6312c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 6313c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 6314c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 6315c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 6316c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 6317c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 6318c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 6319c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 6320c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 6321c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 632210305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 6323c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6324c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_debounce); 6325c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_resume); 6326c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 6327c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 6328c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 6329c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 6330c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 6331b6103f6dSTejun Heo EXPORT_SYMBOL_GPL(sata_port_hardreset); 6332c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 6333c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 6334c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6335c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6336c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6337c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6338c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6339c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 6340c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 6341c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6342c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6343c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6344c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6345c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6346c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 6347c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6348c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6349c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6350c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6351c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_online); 6352c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_offline); 6353cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6354cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 6355c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6356c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 635710305f0fSAlan EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); 63586919a0a6SAlan Cox EXPORT_SYMBOL_GPL(ata_device_blacklisted); 6359c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6360c6fd2807SJeff Garzik 6361c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6362c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6363c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6364c6fd2807SJeff Garzik 6365c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6366c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6367c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); 6368c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 6369c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6370c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6371c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6372c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6373c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6374c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 6375c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 6376c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6377c6fd2807SJeff Garzik 6378c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); 6379c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_resume); 6380c6fd2807SJeff Garzik 6381c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 6382c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6383c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6384c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 6385c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6386c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6387c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6388c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 6389c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 639083625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_on); 639183625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_on); 639283625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_ack); 639383625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); 6394a619f981SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dev_try_classify); 6395