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 62c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 63c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 64c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 65c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 66c6fd2807SJeff Garzik 67c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 68c6fd2807SJeff Garzik u16 heads, u16 sectors); 69c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 70c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev); 71c6fd2807SJeff Garzik 72c6fd2807SJeff Garzik static unsigned int ata_unique_id = 1; 73c6fd2807SJeff Garzik static struct workqueue_struct *ata_wq; 74c6fd2807SJeff Garzik 75c6fd2807SJeff Garzik struct workqueue_struct *ata_aux_wq; 76c6fd2807SJeff Garzik 77c6fd2807SJeff Garzik int atapi_enabled = 1; 78c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 79c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); 80c6fd2807SJeff Garzik 81c6fd2807SJeff Garzik int atapi_dmadir = 0; 82c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 83c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); 84c6fd2807SJeff Garzik 85c6fd2807SJeff Garzik int libata_fua = 0; 86c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 87c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 88c6fd2807SJeff Garzik 89c6fd2807SJeff Garzik static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; 90c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 91c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 92c6fd2807SJeff Garzik 93c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 94c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 95c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 96c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 97c6fd2807SJeff Garzik 98c6fd2807SJeff Garzik 99c6fd2807SJeff Garzik /** 100c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 101c6fd2807SJeff Garzik * @tf: Taskfile to convert 102c6fd2807SJeff Garzik * @fis: Buffer into which data will output 103c6fd2807SJeff Garzik * @pmp: Port multiplier port 104c6fd2807SJeff Garzik * 105c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 106c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 107c6fd2807SJeff Garzik * 108c6fd2807SJeff Garzik * LOCKING: 109c6fd2807SJeff Garzik * Inherited from caller. 110c6fd2807SJeff Garzik */ 111c6fd2807SJeff Garzik 112c6fd2807SJeff Garzik void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) 113c6fd2807SJeff Garzik { 114c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 115c6fd2807SJeff Garzik fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, 116c6fd2807SJeff Garzik bit 7 indicates Command FIS */ 117c6fd2807SJeff Garzik fis[2] = tf->command; 118c6fd2807SJeff Garzik fis[3] = tf->feature; 119c6fd2807SJeff Garzik 120c6fd2807SJeff Garzik fis[4] = tf->lbal; 121c6fd2807SJeff Garzik fis[5] = tf->lbam; 122c6fd2807SJeff Garzik fis[6] = tf->lbah; 123c6fd2807SJeff Garzik fis[7] = tf->device; 124c6fd2807SJeff Garzik 125c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 126c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 127c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 128c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 129c6fd2807SJeff Garzik 130c6fd2807SJeff Garzik fis[12] = tf->nsect; 131c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 132c6fd2807SJeff Garzik fis[14] = 0; 133c6fd2807SJeff Garzik fis[15] = tf->ctl; 134c6fd2807SJeff Garzik 135c6fd2807SJeff Garzik fis[16] = 0; 136c6fd2807SJeff Garzik fis[17] = 0; 137c6fd2807SJeff Garzik fis[18] = 0; 138c6fd2807SJeff Garzik fis[19] = 0; 139c6fd2807SJeff Garzik } 140c6fd2807SJeff Garzik 141c6fd2807SJeff Garzik /** 142c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 143c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 144c6fd2807SJeff Garzik * @tf: Taskfile to output 145c6fd2807SJeff Garzik * 146c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 147c6fd2807SJeff Garzik * 148c6fd2807SJeff Garzik * LOCKING: 149c6fd2807SJeff Garzik * Inherited from caller. 150c6fd2807SJeff Garzik */ 151c6fd2807SJeff Garzik 152c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 153c6fd2807SJeff Garzik { 154c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 155c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 156c6fd2807SJeff Garzik 157c6fd2807SJeff Garzik tf->lbal = fis[4]; 158c6fd2807SJeff Garzik tf->lbam = fis[5]; 159c6fd2807SJeff Garzik tf->lbah = fis[6]; 160c6fd2807SJeff Garzik tf->device = fis[7]; 161c6fd2807SJeff Garzik 162c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 163c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 164c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 165c6fd2807SJeff Garzik 166c6fd2807SJeff Garzik tf->nsect = fis[12]; 167c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 168c6fd2807SJeff Garzik } 169c6fd2807SJeff Garzik 170c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 171c6fd2807SJeff Garzik /* pio multi */ 172c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 173c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 174c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 175c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 176c6fd2807SJeff Garzik 0, 177c6fd2807SJeff Garzik 0, 178c6fd2807SJeff Garzik 0, 179c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 180c6fd2807SJeff Garzik /* pio */ 181c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 182c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 183c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 184c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 185c6fd2807SJeff Garzik 0, 186c6fd2807SJeff Garzik 0, 187c6fd2807SJeff Garzik 0, 188c6fd2807SJeff Garzik 0, 189c6fd2807SJeff Garzik /* dma */ 190c6fd2807SJeff Garzik ATA_CMD_READ, 191c6fd2807SJeff Garzik ATA_CMD_WRITE, 192c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 193c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 194c6fd2807SJeff Garzik 0, 195c6fd2807SJeff Garzik 0, 196c6fd2807SJeff Garzik 0, 197c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 198c6fd2807SJeff Garzik }; 199c6fd2807SJeff Garzik 200c6fd2807SJeff Garzik /** 201c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 202c6fd2807SJeff Garzik * @qc: command to examine and configure 203c6fd2807SJeff Garzik * 204c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 205c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 206c6fd2807SJeff Garzik * 207c6fd2807SJeff Garzik * LOCKING: 208c6fd2807SJeff Garzik * caller. 209c6fd2807SJeff Garzik */ 210c6fd2807SJeff Garzik int ata_rwcmd_protocol(struct ata_queued_cmd *qc) 211c6fd2807SJeff Garzik { 212c6fd2807SJeff Garzik struct ata_taskfile *tf = &qc->tf; 213c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 214c6fd2807SJeff Garzik u8 cmd; 215c6fd2807SJeff Garzik 216c6fd2807SJeff Garzik int index, fua, lba48, write; 217c6fd2807SJeff Garzik 218c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 219c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 220c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 221c6fd2807SJeff Garzik 222c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 223c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 224c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 225c6fd2807SJeff Garzik } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { 226c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 227c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 228c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 229c6fd2807SJeff Garzik } else { 230c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 231c6fd2807SJeff Garzik index = 16; 232c6fd2807SJeff Garzik } 233c6fd2807SJeff Garzik 234c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 235c6fd2807SJeff Garzik if (cmd) { 236c6fd2807SJeff Garzik tf->command = cmd; 237c6fd2807SJeff Garzik return 0; 238c6fd2807SJeff Garzik } 239c6fd2807SJeff Garzik return -1; 240c6fd2807SJeff Garzik } 241c6fd2807SJeff Garzik 242c6fd2807SJeff Garzik /** 24335b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 24435b649feSTejun Heo * @tf: ATA taskfile of interest 24535b649feSTejun Heo * @dev: ATA device @tf belongs to 24635b649feSTejun Heo * 24735b649feSTejun Heo * LOCKING: 24835b649feSTejun Heo * None. 24935b649feSTejun Heo * 25035b649feSTejun Heo * Read block address from @tf. This function can handle all 25135b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 25235b649feSTejun Heo * flags select the address format to use. 25335b649feSTejun Heo * 25435b649feSTejun Heo * RETURNS: 25535b649feSTejun Heo * Block address read from @tf. 25635b649feSTejun Heo */ 25735b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 25835b649feSTejun Heo { 25935b649feSTejun Heo u64 block = 0; 26035b649feSTejun Heo 26135b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 26235b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 26335b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 26435b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 26535b649feSTejun Heo block |= tf->hob_lbal << 24; 26635b649feSTejun Heo } else 26735b649feSTejun Heo block |= (tf->device & 0xf) << 24; 26835b649feSTejun Heo 26935b649feSTejun Heo block |= tf->lbah << 16; 27035b649feSTejun Heo block |= tf->lbam << 8; 27135b649feSTejun Heo block |= tf->lbal; 27235b649feSTejun Heo } else { 27335b649feSTejun Heo u32 cyl, head, sect; 27435b649feSTejun Heo 27535b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 27635b649feSTejun Heo head = tf->device & 0xf; 27735b649feSTejun Heo sect = tf->lbal; 27835b649feSTejun Heo 27935b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 28035b649feSTejun Heo } 28135b649feSTejun Heo 28235b649feSTejun Heo return block; 28335b649feSTejun Heo } 28435b649feSTejun Heo 28535b649feSTejun Heo /** 286c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 287c6fd2807SJeff Garzik * @pio_mask: pio_mask 288c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 289c6fd2807SJeff Garzik * @udma_mask: udma_mask 290c6fd2807SJeff Garzik * 291c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 292c6fd2807SJeff Garzik * unsigned int xfer_mask. 293c6fd2807SJeff Garzik * 294c6fd2807SJeff Garzik * LOCKING: 295c6fd2807SJeff Garzik * None. 296c6fd2807SJeff Garzik * 297c6fd2807SJeff Garzik * RETURNS: 298c6fd2807SJeff Garzik * Packed xfer_mask. 299c6fd2807SJeff Garzik */ 300c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 301c6fd2807SJeff Garzik unsigned int mwdma_mask, 302c6fd2807SJeff Garzik unsigned int udma_mask) 303c6fd2807SJeff Garzik { 304c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 305c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 306c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 307c6fd2807SJeff Garzik } 308c6fd2807SJeff Garzik 309c6fd2807SJeff Garzik /** 310c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 311c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 312c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 313c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 314c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 315c6fd2807SJeff Garzik * 316c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 317c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 318c6fd2807SJeff Garzik */ 319c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 320c6fd2807SJeff Garzik unsigned int *pio_mask, 321c6fd2807SJeff Garzik unsigned int *mwdma_mask, 322c6fd2807SJeff Garzik unsigned int *udma_mask) 323c6fd2807SJeff Garzik { 324c6fd2807SJeff Garzik if (pio_mask) 325c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 326c6fd2807SJeff Garzik if (mwdma_mask) 327c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 328c6fd2807SJeff Garzik if (udma_mask) 329c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 330c6fd2807SJeff Garzik } 331c6fd2807SJeff Garzik 332c6fd2807SJeff Garzik static const struct ata_xfer_ent { 333c6fd2807SJeff Garzik int shift, bits; 334c6fd2807SJeff Garzik u8 base; 335c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 336c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 337c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 338c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 339c6fd2807SJeff Garzik { -1, }, 340c6fd2807SJeff Garzik }; 341c6fd2807SJeff Garzik 342c6fd2807SJeff Garzik /** 343c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 344c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 345c6fd2807SJeff Garzik * 346c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 347c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 348c6fd2807SJeff Garzik * 349c6fd2807SJeff Garzik * LOCKING: 350c6fd2807SJeff Garzik * None. 351c6fd2807SJeff Garzik * 352c6fd2807SJeff Garzik * RETURNS: 353c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 354c6fd2807SJeff Garzik */ 355c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 356c6fd2807SJeff Garzik { 357c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 358c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 359c6fd2807SJeff Garzik 360c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 361c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 362c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 363c6fd2807SJeff Garzik return 0; 364c6fd2807SJeff Garzik } 365c6fd2807SJeff Garzik 366c6fd2807SJeff Garzik /** 367c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 368c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 369c6fd2807SJeff Garzik * 370c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 371c6fd2807SJeff Garzik * 372c6fd2807SJeff Garzik * LOCKING: 373c6fd2807SJeff Garzik * None. 374c6fd2807SJeff Garzik * 375c6fd2807SJeff Garzik * RETURNS: 376c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 377c6fd2807SJeff Garzik */ 378c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 379c6fd2807SJeff Garzik { 380c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 381c6fd2807SJeff Garzik 382c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 383c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 384c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 385c6fd2807SJeff Garzik return 0; 386c6fd2807SJeff Garzik } 387c6fd2807SJeff Garzik 388c6fd2807SJeff Garzik /** 389c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 390c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 391c6fd2807SJeff Garzik * 392c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 393c6fd2807SJeff Garzik * 394c6fd2807SJeff Garzik * LOCKING: 395c6fd2807SJeff Garzik * None. 396c6fd2807SJeff Garzik * 397c6fd2807SJeff Garzik * RETURNS: 398c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 399c6fd2807SJeff Garzik */ 400c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 401c6fd2807SJeff Garzik { 402c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 403c6fd2807SJeff Garzik 404c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 405c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 406c6fd2807SJeff Garzik return ent->shift; 407c6fd2807SJeff Garzik return -1; 408c6fd2807SJeff Garzik } 409c6fd2807SJeff Garzik 410c6fd2807SJeff Garzik /** 411c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 412c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 413c6fd2807SJeff Garzik * 414c6fd2807SJeff Garzik * Determine string which represents the highest speed 415c6fd2807SJeff Garzik * (highest bit in @modemask). 416c6fd2807SJeff Garzik * 417c6fd2807SJeff Garzik * LOCKING: 418c6fd2807SJeff Garzik * None. 419c6fd2807SJeff Garzik * 420c6fd2807SJeff Garzik * RETURNS: 421c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 422c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 423c6fd2807SJeff Garzik */ 424c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 425c6fd2807SJeff Garzik { 426c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 427c6fd2807SJeff Garzik "PIO0", 428c6fd2807SJeff Garzik "PIO1", 429c6fd2807SJeff Garzik "PIO2", 430c6fd2807SJeff Garzik "PIO3", 431c6fd2807SJeff Garzik "PIO4", 432b352e57dSAlan Cox "PIO5", 433b352e57dSAlan Cox "PIO6", 434c6fd2807SJeff Garzik "MWDMA0", 435c6fd2807SJeff Garzik "MWDMA1", 436c6fd2807SJeff Garzik "MWDMA2", 437b352e57dSAlan Cox "MWDMA3", 438b352e57dSAlan Cox "MWDMA4", 439c6fd2807SJeff Garzik "UDMA/16", 440c6fd2807SJeff Garzik "UDMA/25", 441c6fd2807SJeff Garzik "UDMA/33", 442c6fd2807SJeff Garzik "UDMA/44", 443c6fd2807SJeff Garzik "UDMA/66", 444c6fd2807SJeff Garzik "UDMA/100", 445c6fd2807SJeff Garzik "UDMA/133", 446c6fd2807SJeff Garzik "UDMA7", 447c6fd2807SJeff Garzik }; 448c6fd2807SJeff Garzik int highbit; 449c6fd2807SJeff Garzik 450c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 451c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 452c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 453c6fd2807SJeff Garzik return "<n/a>"; 454c6fd2807SJeff Garzik } 455c6fd2807SJeff Garzik 456c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 457c6fd2807SJeff Garzik { 458c6fd2807SJeff Garzik static const char * const spd_str[] = { 459c6fd2807SJeff Garzik "1.5 Gbps", 460c6fd2807SJeff Garzik "3.0 Gbps", 461c6fd2807SJeff Garzik }; 462c6fd2807SJeff Garzik 463c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 464c6fd2807SJeff Garzik return "<unknown>"; 465c6fd2807SJeff Garzik return spd_str[spd - 1]; 466c6fd2807SJeff Garzik } 467c6fd2807SJeff Garzik 468c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 469c6fd2807SJeff Garzik { 470c6fd2807SJeff Garzik if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) { 471c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 472c6fd2807SJeff Garzik dev->class++; 473c6fd2807SJeff Garzik } 474c6fd2807SJeff Garzik } 475c6fd2807SJeff Garzik 476c6fd2807SJeff Garzik /** 477c6fd2807SJeff Garzik * ata_pio_devchk - PATA device presence detection 478c6fd2807SJeff Garzik * @ap: ATA channel to examine 479c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 480c6fd2807SJeff Garzik * 481c6fd2807SJeff Garzik * This technique was originally described in 482c6fd2807SJeff Garzik * Hale Landis's ATADRVR (www.ata-atapi.com), and 483c6fd2807SJeff Garzik * later found its way into the ATA/ATAPI spec. 484c6fd2807SJeff Garzik * 485c6fd2807SJeff Garzik * Write a pattern to the ATA shadow registers, 486c6fd2807SJeff Garzik * and if a device is present, it will respond by 487c6fd2807SJeff Garzik * correctly storing and echoing back the 488c6fd2807SJeff Garzik * ATA shadow register contents. 489c6fd2807SJeff Garzik * 490c6fd2807SJeff Garzik * LOCKING: 491c6fd2807SJeff Garzik * caller. 492c6fd2807SJeff Garzik */ 493c6fd2807SJeff Garzik 494c6fd2807SJeff Garzik static unsigned int ata_pio_devchk(struct ata_port *ap, 495c6fd2807SJeff Garzik unsigned int device) 496c6fd2807SJeff Garzik { 497c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 498c6fd2807SJeff Garzik u8 nsect, lbal; 499c6fd2807SJeff Garzik 500c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 501c6fd2807SJeff Garzik 502c6fd2807SJeff Garzik outb(0x55, ioaddr->nsect_addr); 503c6fd2807SJeff Garzik outb(0xaa, ioaddr->lbal_addr); 504c6fd2807SJeff Garzik 505c6fd2807SJeff Garzik outb(0xaa, ioaddr->nsect_addr); 506c6fd2807SJeff Garzik outb(0x55, ioaddr->lbal_addr); 507c6fd2807SJeff Garzik 508c6fd2807SJeff Garzik outb(0x55, ioaddr->nsect_addr); 509c6fd2807SJeff Garzik outb(0xaa, ioaddr->lbal_addr); 510c6fd2807SJeff Garzik 511c6fd2807SJeff Garzik nsect = inb(ioaddr->nsect_addr); 512c6fd2807SJeff Garzik lbal = inb(ioaddr->lbal_addr); 513c6fd2807SJeff Garzik 514c6fd2807SJeff Garzik if ((nsect == 0x55) && (lbal == 0xaa)) 515c6fd2807SJeff Garzik return 1; /* we found a device */ 516c6fd2807SJeff Garzik 517c6fd2807SJeff Garzik return 0; /* nothing found */ 518c6fd2807SJeff Garzik } 519c6fd2807SJeff Garzik 520c6fd2807SJeff Garzik /** 521c6fd2807SJeff Garzik * ata_mmio_devchk - PATA device presence detection 522c6fd2807SJeff Garzik * @ap: ATA channel to examine 523c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 524c6fd2807SJeff Garzik * 525c6fd2807SJeff Garzik * This technique was originally described in 526c6fd2807SJeff Garzik * Hale Landis's ATADRVR (www.ata-atapi.com), and 527c6fd2807SJeff Garzik * later found its way into the ATA/ATAPI spec. 528c6fd2807SJeff Garzik * 529c6fd2807SJeff Garzik * Write a pattern to the ATA shadow registers, 530c6fd2807SJeff Garzik * and if a device is present, it will respond by 531c6fd2807SJeff Garzik * correctly storing and echoing back the 532c6fd2807SJeff Garzik * ATA shadow register contents. 533c6fd2807SJeff Garzik * 534c6fd2807SJeff Garzik * LOCKING: 535c6fd2807SJeff Garzik * caller. 536c6fd2807SJeff Garzik */ 537c6fd2807SJeff Garzik 538c6fd2807SJeff Garzik static unsigned int ata_mmio_devchk(struct ata_port *ap, 539c6fd2807SJeff Garzik unsigned int device) 540c6fd2807SJeff Garzik { 541c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 542c6fd2807SJeff Garzik u8 nsect, lbal; 543c6fd2807SJeff Garzik 544c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 545c6fd2807SJeff Garzik 546c6fd2807SJeff Garzik writeb(0x55, (void __iomem *) ioaddr->nsect_addr); 547c6fd2807SJeff Garzik writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); 548c6fd2807SJeff Garzik 549c6fd2807SJeff Garzik writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); 550c6fd2807SJeff Garzik writeb(0x55, (void __iomem *) ioaddr->lbal_addr); 551c6fd2807SJeff Garzik 552c6fd2807SJeff Garzik writeb(0x55, (void __iomem *) ioaddr->nsect_addr); 553c6fd2807SJeff Garzik writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); 554c6fd2807SJeff Garzik 555c6fd2807SJeff Garzik nsect = readb((void __iomem *) ioaddr->nsect_addr); 556c6fd2807SJeff Garzik lbal = readb((void __iomem *) ioaddr->lbal_addr); 557c6fd2807SJeff Garzik 558c6fd2807SJeff Garzik if ((nsect == 0x55) && (lbal == 0xaa)) 559c6fd2807SJeff Garzik return 1; /* we found a device */ 560c6fd2807SJeff Garzik 561c6fd2807SJeff Garzik return 0; /* nothing found */ 562c6fd2807SJeff Garzik } 563c6fd2807SJeff Garzik 564c6fd2807SJeff Garzik /** 565c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 566c6fd2807SJeff Garzik * @ap: ATA channel to examine 567c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 568c6fd2807SJeff Garzik * 569c6fd2807SJeff Garzik * Dispatch ATA device presence detection, depending 570c6fd2807SJeff Garzik * on whether we are using PIO or MMIO to talk to the 571c6fd2807SJeff Garzik * ATA shadow registers. 572c6fd2807SJeff Garzik * 573c6fd2807SJeff Garzik * LOCKING: 574c6fd2807SJeff Garzik * caller. 575c6fd2807SJeff Garzik */ 576c6fd2807SJeff Garzik 577c6fd2807SJeff Garzik static unsigned int ata_devchk(struct ata_port *ap, 578c6fd2807SJeff Garzik unsigned int device) 579c6fd2807SJeff Garzik { 580c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_MMIO) 581c6fd2807SJeff Garzik return ata_mmio_devchk(ap, device); 582c6fd2807SJeff Garzik return ata_pio_devchk(ap, device); 583c6fd2807SJeff Garzik } 584c6fd2807SJeff Garzik 585c6fd2807SJeff Garzik /** 586c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 587c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 588c6fd2807SJeff Garzik * 589c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 590c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 591c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 592c6fd2807SJeff Garzik * 593c6fd2807SJeff Garzik * LOCKING: 594c6fd2807SJeff Garzik * None. 595c6fd2807SJeff Garzik * 596c6fd2807SJeff Garzik * RETURNS: 597c6fd2807SJeff Garzik * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN 598c6fd2807SJeff Garzik * the event of failure. 599c6fd2807SJeff Garzik */ 600c6fd2807SJeff Garzik 601c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 602c6fd2807SJeff Garzik { 603c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 604c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 605c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 606c6fd2807SJeff Garzik */ 607c6fd2807SJeff Garzik 608c6fd2807SJeff Garzik if (((tf->lbam == 0) && (tf->lbah == 0)) || 609c6fd2807SJeff Garzik ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { 610c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 611c6fd2807SJeff Garzik return ATA_DEV_ATA; 612c6fd2807SJeff Garzik } 613c6fd2807SJeff Garzik 614c6fd2807SJeff Garzik if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || 615c6fd2807SJeff Garzik ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { 616c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 617c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 618c6fd2807SJeff Garzik } 619c6fd2807SJeff Garzik 620c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 621c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 622c6fd2807SJeff Garzik } 623c6fd2807SJeff Garzik 624c6fd2807SJeff Garzik /** 625c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 626c6fd2807SJeff Garzik * @ap: ATA channel to examine 627c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 628c6fd2807SJeff Garzik * @r_err: Value of error register on completion 629c6fd2807SJeff Garzik * 630c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 631c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 632c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 633c6fd2807SJeff Garzik * and diagnostics. 634c6fd2807SJeff Garzik * 635c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 636c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 637c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 638c6fd2807SJeff Garzik * 639c6fd2807SJeff Garzik * LOCKING: 640c6fd2807SJeff Garzik * caller. 641c6fd2807SJeff Garzik * 642c6fd2807SJeff Garzik * RETURNS: 643c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 644c6fd2807SJeff Garzik */ 645c6fd2807SJeff Garzik 646c6fd2807SJeff Garzik static unsigned int 647c6fd2807SJeff Garzik ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) 648c6fd2807SJeff Garzik { 649c6fd2807SJeff Garzik struct ata_taskfile tf; 650c6fd2807SJeff Garzik unsigned int class; 651c6fd2807SJeff Garzik u8 err; 652c6fd2807SJeff Garzik 653c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 654c6fd2807SJeff Garzik 655c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 656c6fd2807SJeff Garzik 657c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 658c6fd2807SJeff Garzik err = tf.feature; 659c6fd2807SJeff Garzik if (r_err) 660c6fd2807SJeff Garzik *r_err = err; 661c6fd2807SJeff Garzik 66293590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 66393590859SAlan Cox if (err == 0 && device == 0) 66493590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 66593590859SAlan Cox ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; 66693590859SAlan Cox else if (err == 1) 667c6fd2807SJeff Garzik /* do nothing */ ; 668c6fd2807SJeff Garzik else if ((device == 0) && (err == 0x81)) 669c6fd2807SJeff Garzik /* do nothing */ ; 670c6fd2807SJeff Garzik else 671c6fd2807SJeff Garzik return ATA_DEV_NONE; 672c6fd2807SJeff Garzik 673c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 674c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 675c6fd2807SJeff Garzik 676c6fd2807SJeff Garzik if (class == ATA_DEV_UNKNOWN) 677c6fd2807SJeff Garzik return ATA_DEV_NONE; 678c6fd2807SJeff Garzik if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 679c6fd2807SJeff Garzik return ATA_DEV_NONE; 680c6fd2807SJeff Garzik return class; 681c6fd2807SJeff Garzik } 682c6fd2807SJeff Garzik 683c6fd2807SJeff Garzik /** 684c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 685c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 686c6fd2807SJeff Garzik * @s: string into which data is output 687c6fd2807SJeff Garzik * @ofs: offset into identify device page 688c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 689c6fd2807SJeff Garzik * 690c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 691c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 692c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 693c6fd2807SJeff Garzik * 694c6fd2807SJeff Garzik * LOCKING: 695c6fd2807SJeff Garzik * caller. 696c6fd2807SJeff Garzik */ 697c6fd2807SJeff Garzik 698c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 699c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 700c6fd2807SJeff Garzik { 701c6fd2807SJeff Garzik unsigned int c; 702c6fd2807SJeff Garzik 703c6fd2807SJeff Garzik while (len > 0) { 704c6fd2807SJeff Garzik c = id[ofs] >> 8; 705c6fd2807SJeff Garzik *s = c; 706c6fd2807SJeff Garzik s++; 707c6fd2807SJeff Garzik 708c6fd2807SJeff Garzik c = id[ofs] & 0xff; 709c6fd2807SJeff Garzik *s = c; 710c6fd2807SJeff Garzik s++; 711c6fd2807SJeff Garzik 712c6fd2807SJeff Garzik ofs++; 713c6fd2807SJeff Garzik len -= 2; 714c6fd2807SJeff Garzik } 715c6fd2807SJeff Garzik } 716c6fd2807SJeff Garzik 717c6fd2807SJeff Garzik /** 718c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 719c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 720c6fd2807SJeff Garzik * @s: string into which data is output 721c6fd2807SJeff Garzik * @ofs: offset into identify device page 722c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 723c6fd2807SJeff Garzik * 724c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 725c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 726c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 727c6fd2807SJeff Garzik * 728c6fd2807SJeff Garzik * LOCKING: 729c6fd2807SJeff Garzik * caller. 730c6fd2807SJeff Garzik */ 731c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 732c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 733c6fd2807SJeff Garzik { 734c6fd2807SJeff Garzik unsigned char *p; 735c6fd2807SJeff Garzik 736c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 737c6fd2807SJeff Garzik 738c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 739c6fd2807SJeff Garzik 740c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 741c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 742c6fd2807SJeff Garzik p--; 743c6fd2807SJeff Garzik *p = '\0'; 744c6fd2807SJeff Garzik } 745c6fd2807SJeff Garzik 746c6fd2807SJeff Garzik static u64 ata_id_n_sectors(const u16 *id) 747c6fd2807SJeff Garzik { 748c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 749c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) 750c6fd2807SJeff Garzik return ata_id_u64(id, 100); 751c6fd2807SJeff Garzik else 752c6fd2807SJeff Garzik return ata_id_u32(id, 60); 753c6fd2807SJeff Garzik } else { 754c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) 755c6fd2807SJeff Garzik return ata_id_u32(id, 57); 756c6fd2807SJeff Garzik else 757c6fd2807SJeff Garzik return id[1] * id[3] * id[6]; 758c6fd2807SJeff Garzik } 759c6fd2807SJeff Garzik } 760c6fd2807SJeff Garzik 761c6fd2807SJeff Garzik /** 762c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 763c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 764c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 765c6fd2807SJeff Garzik * 766c6fd2807SJeff Garzik * This function performs no actual function. 767c6fd2807SJeff Garzik * 768c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 769c6fd2807SJeff Garzik * 770c6fd2807SJeff Garzik * LOCKING: 771c6fd2807SJeff Garzik * caller. 772c6fd2807SJeff Garzik */ 773c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 774c6fd2807SJeff Garzik { 775c6fd2807SJeff Garzik } 776c6fd2807SJeff Garzik 777c6fd2807SJeff Garzik 778c6fd2807SJeff Garzik /** 779c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 780c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 781c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 782c6fd2807SJeff Garzik * 783c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 784c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 785c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 786c6fd2807SJeff Garzik * 787c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 788c6fd2807SJeff Garzik * 789c6fd2807SJeff Garzik * LOCKING: 790c6fd2807SJeff Garzik * caller. 791c6fd2807SJeff Garzik */ 792c6fd2807SJeff Garzik 793c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 794c6fd2807SJeff Garzik { 795c6fd2807SJeff Garzik u8 tmp; 796c6fd2807SJeff Garzik 797c6fd2807SJeff Garzik if (device == 0) 798c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 799c6fd2807SJeff Garzik else 800c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 801c6fd2807SJeff Garzik 802c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_MMIO) { 803c6fd2807SJeff Garzik writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); 804c6fd2807SJeff Garzik } else { 805c6fd2807SJeff Garzik outb(tmp, ap->ioaddr.device_addr); 806c6fd2807SJeff Garzik } 807c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 808c6fd2807SJeff Garzik } 809c6fd2807SJeff Garzik 810c6fd2807SJeff Garzik /** 811c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 812c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 813c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 814c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 815c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 816c6fd2807SJeff Garzik * 817c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 818c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 819c6fd2807SJeff Garzik * ATA channel. 820c6fd2807SJeff Garzik * 821c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 822c6fd2807SJeff Garzik * which additionally provides the services of inserting 823c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 824c6fd2807SJeff Garzik * 825c6fd2807SJeff Garzik * LOCKING: 826c6fd2807SJeff Garzik * caller. 827c6fd2807SJeff Garzik */ 828c6fd2807SJeff Garzik 829c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 830c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 831c6fd2807SJeff Garzik { 832c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 833c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: " 834c6fd2807SJeff Garzik "device %u, wait %u\n", ap->id, device, wait); 835c6fd2807SJeff Garzik 836c6fd2807SJeff Garzik if (wait) 837c6fd2807SJeff Garzik ata_wait_idle(ap); 838c6fd2807SJeff Garzik 839c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 840c6fd2807SJeff Garzik 841c6fd2807SJeff Garzik if (wait) { 842c6fd2807SJeff Garzik if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) 843c6fd2807SJeff Garzik msleep(150); 844c6fd2807SJeff Garzik ata_wait_idle(ap); 845c6fd2807SJeff Garzik } 846c6fd2807SJeff Garzik } 847c6fd2807SJeff Garzik 848c6fd2807SJeff Garzik /** 849c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 850c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 851c6fd2807SJeff Garzik * 852c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 853c6fd2807SJeff Garzik * page. 854c6fd2807SJeff Garzik * 855c6fd2807SJeff Garzik * LOCKING: 856c6fd2807SJeff Garzik * caller. 857c6fd2807SJeff Garzik */ 858c6fd2807SJeff Garzik 859c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 860c6fd2807SJeff Garzik { 861c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 862c6fd2807SJeff Garzik "53==0x%04x " 863c6fd2807SJeff Garzik "63==0x%04x " 864c6fd2807SJeff Garzik "64==0x%04x " 865c6fd2807SJeff Garzik "75==0x%04x \n", 866c6fd2807SJeff Garzik id[49], 867c6fd2807SJeff Garzik id[53], 868c6fd2807SJeff Garzik id[63], 869c6fd2807SJeff Garzik id[64], 870c6fd2807SJeff Garzik id[75]); 871c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 872c6fd2807SJeff Garzik "81==0x%04x " 873c6fd2807SJeff Garzik "82==0x%04x " 874c6fd2807SJeff Garzik "83==0x%04x " 875c6fd2807SJeff Garzik "84==0x%04x \n", 876c6fd2807SJeff Garzik id[80], 877c6fd2807SJeff Garzik id[81], 878c6fd2807SJeff Garzik id[82], 879c6fd2807SJeff Garzik id[83], 880c6fd2807SJeff Garzik id[84]); 881c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 882c6fd2807SJeff Garzik "93==0x%04x\n", 883c6fd2807SJeff Garzik id[88], 884c6fd2807SJeff Garzik id[93]); 885c6fd2807SJeff Garzik } 886c6fd2807SJeff Garzik 887c6fd2807SJeff Garzik /** 888c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 889c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 890c6fd2807SJeff Garzik * 891c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 892c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 893c6fd2807SJeff Garzik * 894c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 895c6fd2807SJeff Garzik * 896c6fd2807SJeff Garzik * LOCKING: 897c6fd2807SJeff Garzik * None. 898c6fd2807SJeff Garzik * 899c6fd2807SJeff Garzik * RETURNS: 900c6fd2807SJeff Garzik * Computed xfermask 901c6fd2807SJeff Garzik */ 902c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 903c6fd2807SJeff Garzik { 904c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 905c6fd2807SJeff Garzik 906c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 907c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 908c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 909c6fd2807SJeff Garzik pio_mask <<= 3; 910c6fd2807SJeff Garzik pio_mask |= 0x7; 911c6fd2807SJeff Garzik } else { 912c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 913c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 914c6fd2807SJeff Garzik * a mask. 915c6fd2807SJeff Garzik */ 91646767aebSAlan Cox u8 mode = id[ATA_ID_OLD_PIO_MODES] & 0xFF; 91746767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 91846767aebSAlan Cox pio_mask = (2 << mode) - 1; 91946767aebSAlan Cox else 92046767aebSAlan Cox pio_mask = 1; 921c6fd2807SJeff Garzik 922c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 923c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 924c6fd2807SJeff Garzik * process. However its the speeds not the modes that 925c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 926c6fd2807SJeff Garzik * will get this right anyway 927c6fd2807SJeff Garzik */ 928c6fd2807SJeff Garzik } 929c6fd2807SJeff Garzik 930c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 931c6fd2807SJeff Garzik 932b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 933b352e57dSAlan Cox /* 934b352e57dSAlan Cox * Process compact flash extended modes 935b352e57dSAlan Cox */ 936b352e57dSAlan Cox int pio = id[163] & 0x7; 937b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 938b352e57dSAlan Cox 939b352e57dSAlan Cox if (pio) 940b352e57dSAlan Cox pio_mask |= (1 << 5); 941b352e57dSAlan Cox if (pio > 1) 942b352e57dSAlan Cox pio_mask |= (1 << 6); 943b352e57dSAlan Cox if (dma) 944b352e57dSAlan Cox mwdma_mask |= (1 << 3); 945b352e57dSAlan Cox if (dma > 1) 946b352e57dSAlan Cox mwdma_mask |= (1 << 4); 947b352e57dSAlan Cox } 948b352e57dSAlan Cox 949c6fd2807SJeff Garzik udma_mask = 0; 950c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 951c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 952c6fd2807SJeff Garzik 953c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 954c6fd2807SJeff Garzik } 955c6fd2807SJeff Garzik 956c6fd2807SJeff Garzik /** 957c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 958c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 959c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 960c6fd2807SJeff Garzik * @data: data value to pass to workqueue function 961c6fd2807SJeff Garzik * @delay: delay time for workqueue function 962c6fd2807SJeff Garzik * 963c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 964c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 965c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 966c6fd2807SJeff Garzik * one task is active at any given time. 967c6fd2807SJeff Garzik * 968c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 969c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 970c6fd2807SJeff Garzik * synchronization. 971c6fd2807SJeff Garzik * 972c6fd2807SJeff Garzik * LOCKING: 973c6fd2807SJeff Garzik * Inherited from caller. 974c6fd2807SJeff Garzik */ 975c6fd2807SJeff Garzik void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data, 976c6fd2807SJeff Garzik unsigned long delay) 977c6fd2807SJeff Garzik { 978c6fd2807SJeff Garzik int rc; 979c6fd2807SJeff Garzik 980c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK) 981c6fd2807SJeff Garzik return; 982c6fd2807SJeff Garzik 983c6fd2807SJeff Garzik PREPARE_WORK(&ap->port_task, fn, data); 984c6fd2807SJeff Garzik 985c6fd2807SJeff Garzik if (!delay) 986c6fd2807SJeff Garzik rc = queue_work(ata_wq, &ap->port_task); 987c6fd2807SJeff Garzik else 988c6fd2807SJeff Garzik rc = queue_delayed_work(ata_wq, &ap->port_task, delay); 989c6fd2807SJeff Garzik 990c6fd2807SJeff Garzik /* rc == 0 means that another user is using port task */ 991c6fd2807SJeff Garzik WARN_ON(rc == 0); 992c6fd2807SJeff Garzik } 993c6fd2807SJeff Garzik 994c6fd2807SJeff Garzik /** 995c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 996c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 997c6fd2807SJeff Garzik * 998c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 999c6fd2807SJeff Garzik * be running or scheduled. 1000c6fd2807SJeff Garzik * 1001c6fd2807SJeff Garzik * LOCKING: 1002c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1003c6fd2807SJeff Garzik */ 1004c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1005c6fd2807SJeff Garzik { 1006c6fd2807SJeff Garzik unsigned long flags; 1007c6fd2807SJeff Garzik 1008c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1009c6fd2807SJeff Garzik 1010c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1011c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK; 1012c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1013c6fd2807SJeff Garzik 1014c6fd2807SJeff Garzik DPRINTK("flush #1\n"); 1015c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1016c6fd2807SJeff Garzik 1017c6fd2807SJeff Garzik /* 1018c6fd2807SJeff Garzik * At this point, if a task is running, it's guaranteed to see 1019c6fd2807SJeff Garzik * the FLUSH flag; thus, it will never queue pio tasks again. 1020c6fd2807SJeff Garzik * Cancel and flush. 1021c6fd2807SJeff Garzik */ 1022c6fd2807SJeff Garzik if (!cancel_delayed_work(&ap->port_task)) { 1023c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1024c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n", 1025c6fd2807SJeff Garzik __FUNCTION__); 1026c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1027c6fd2807SJeff Garzik } 1028c6fd2807SJeff Garzik 1029c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1030c6fd2807SJeff Garzik ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK; 1031c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1032c6fd2807SJeff Garzik 1033c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1034c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1035c6fd2807SJeff Garzik } 1036c6fd2807SJeff Garzik 1037c6fd2807SJeff Garzik void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1038c6fd2807SJeff Garzik { 1039c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1040c6fd2807SJeff Garzik 1041c6fd2807SJeff Garzik complete(waiting); 1042c6fd2807SJeff Garzik } 1043c6fd2807SJeff Garzik 1044c6fd2807SJeff Garzik /** 1045c6fd2807SJeff Garzik * ata_exec_internal - execute libata internal command 1046c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1047c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1048c6fd2807SJeff Garzik * @cdb: CDB for packet command 1049c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 1050c6fd2807SJeff Garzik * @buf: Data buffer of the command 1051c6fd2807SJeff Garzik * @buflen: Length of data buffer 1052c6fd2807SJeff Garzik * 1053c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1054c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1055c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1056c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1057c6fd2807SJeff Garzik * clean up after timeout. 1058c6fd2807SJeff Garzik * 1059c6fd2807SJeff Garzik * LOCKING: 1060c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1061c6fd2807SJeff Garzik * 1062c6fd2807SJeff Garzik * RETURNS: 1063c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1064c6fd2807SJeff Garzik */ 1065c6fd2807SJeff Garzik unsigned ata_exec_internal(struct ata_device *dev, 1066c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 1067c6fd2807SJeff Garzik int dma_dir, void *buf, unsigned int buflen) 1068c6fd2807SJeff Garzik { 1069c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1070c6fd2807SJeff Garzik u8 command = tf->command; 1071c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1072c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1073c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1074c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1075c6fd2807SJeff Garzik unsigned long flags; 1076c6fd2807SJeff Garzik unsigned int err_mask; 1077c6fd2807SJeff Garzik int rc; 1078c6fd2807SJeff Garzik 1079c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1080c6fd2807SJeff Garzik 1081c6fd2807SJeff Garzik /* no internal command while frozen */ 1082c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1083c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1084c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1085c6fd2807SJeff Garzik } 1086c6fd2807SJeff Garzik 1087c6fd2807SJeff Garzik /* initialize internal qc */ 1088c6fd2807SJeff Garzik 1089c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1090c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1091c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1092c6fd2807SJeff Garzik * EH stuff without converting to it. 1093c6fd2807SJeff Garzik */ 1094c6fd2807SJeff Garzik if (ap->ops->error_handler) 1095c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1096c6fd2807SJeff Garzik else 1097c6fd2807SJeff Garzik tag = 0; 1098c6fd2807SJeff Garzik 1099c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1100c6fd2807SJeff Garzik BUG(); 1101c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1102c6fd2807SJeff Garzik 1103c6fd2807SJeff Garzik qc->tag = tag; 1104c6fd2807SJeff Garzik qc->scsicmd = NULL; 1105c6fd2807SJeff Garzik qc->ap = ap; 1106c6fd2807SJeff Garzik qc->dev = dev; 1107c6fd2807SJeff Garzik ata_qc_reinit(qc); 1108c6fd2807SJeff Garzik 1109c6fd2807SJeff Garzik preempted_tag = ap->active_tag; 1110c6fd2807SJeff Garzik preempted_sactive = ap->sactive; 1111c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1112c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 1113c6fd2807SJeff Garzik ap->sactive = 0; 1114c6fd2807SJeff Garzik ap->qc_active = 0; 1115c6fd2807SJeff Garzik 1116c6fd2807SJeff Garzik /* prepare & issue qc */ 1117c6fd2807SJeff Garzik qc->tf = *tf; 1118c6fd2807SJeff Garzik if (cdb) 1119c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1120c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1121c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1122c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 1123c6fd2807SJeff Garzik ata_sg_init_one(qc, buf, buflen); 1124c6fd2807SJeff Garzik qc->nsect = buflen / ATA_SECT_SIZE; 1125c6fd2807SJeff Garzik } 1126c6fd2807SJeff Garzik 1127c6fd2807SJeff Garzik qc->private_data = &wait; 1128c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1129c6fd2807SJeff Garzik 1130c6fd2807SJeff Garzik ata_qc_issue(qc); 1131c6fd2807SJeff Garzik 1132c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1133c6fd2807SJeff Garzik 1134c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1135c6fd2807SJeff Garzik 1136c6fd2807SJeff Garzik ata_port_flush_task(ap); 1137c6fd2807SJeff Garzik 1138c6fd2807SJeff Garzik if (!rc) { 1139c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1140c6fd2807SJeff Garzik 1141c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1142c6fd2807SJeff Garzik * following test prevents us from completing the qc 1143c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1144c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1145c6fd2807SJeff Garzik */ 1146c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1147c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1148c6fd2807SJeff Garzik 1149c6fd2807SJeff Garzik if (ap->ops->error_handler) 1150c6fd2807SJeff Garzik ata_port_freeze(ap); 1151c6fd2807SJeff Garzik else 1152c6fd2807SJeff Garzik ata_qc_complete(qc); 1153c6fd2807SJeff Garzik 1154c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1155c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1156c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1157c6fd2807SJeff Garzik } 1158c6fd2807SJeff Garzik 1159c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1160c6fd2807SJeff Garzik } 1161c6fd2807SJeff Garzik 1162c6fd2807SJeff Garzik /* do post_internal_cmd */ 1163c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1164c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1165c6fd2807SJeff Garzik 1166c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) { 1167c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1168c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1169c6fd2807SJeff Garzik "zero err_mask for failed " 1170c6fd2807SJeff Garzik "internal command, assuming AC_ERR_OTHER\n"); 1171c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1172c6fd2807SJeff Garzik } 1173c6fd2807SJeff Garzik 1174c6fd2807SJeff Garzik /* finish up */ 1175c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1176c6fd2807SJeff Garzik 1177c6fd2807SJeff Garzik *tf = qc->result_tf; 1178c6fd2807SJeff Garzik err_mask = qc->err_mask; 1179c6fd2807SJeff Garzik 1180c6fd2807SJeff Garzik ata_qc_free(qc); 1181c6fd2807SJeff Garzik ap->active_tag = preempted_tag; 1182c6fd2807SJeff Garzik ap->sactive = preempted_sactive; 1183c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1184c6fd2807SJeff Garzik 1185c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1186c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1187c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1188c6fd2807SJeff Garzik * port. 1189c6fd2807SJeff Garzik * 1190c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1191c6fd2807SJeff Garzik * command failure results in disabling the device in the 1192c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1193c6fd2807SJeff Garzik * 1194c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1195c6fd2807SJeff Garzik */ 1196c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1197c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1198c6fd2807SJeff Garzik ata_port_probe(ap); 1199c6fd2807SJeff Garzik } 1200c6fd2807SJeff Garzik 1201c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1202c6fd2807SJeff Garzik 1203c6fd2807SJeff Garzik return err_mask; 1204c6fd2807SJeff Garzik } 1205c6fd2807SJeff Garzik 1206c6fd2807SJeff Garzik /** 1207c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1208c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1209c6fd2807SJeff Garzik * @cmd: Opcode to execute 1210c6fd2807SJeff Garzik * 1211c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1212c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1213c6fd2807SJeff Garzik * 1214c6fd2807SJeff Garzik * LOCKING: 1215c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1216c6fd2807SJeff Garzik * 1217c6fd2807SJeff Garzik * RETURNS: 1218c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1219c6fd2807SJeff Garzik */ 1220c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1221c6fd2807SJeff Garzik { 1222c6fd2807SJeff Garzik struct ata_taskfile tf; 1223c6fd2807SJeff Garzik 1224c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1225c6fd2807SJeff Garzik 1226c6fd2807SJeff Garzik tf.command = cmd; 1227c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1228c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1229c6fd2807SJeff Garzik 1230c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1231c6fd2807SJeff Garzik } 1232c6fd2807SJeff Garzik 1233c6fd2807SJeff Garzik /** 1234c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1235c6fd2807SJeff Garzik * @adev: ATA device 1236c6fd2807SJeff Garzik * 1237c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1238c6fd2807SJeff Garzik * by various controllers for chip configuration. 1239c6fd2807SJeff Garzik */ 1240c6fd2807SJeff Garzik 1241c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1242c6fd2807SJeff Garzik { 1243c6fd2807SJeff Garzik int pio; 1244c6fd2807SJeff Garzik int speed = adev->pio_mode - XFER_PIO_0; 1245c6fd2807SJeff Garzik 1246c6fd2807SJeff Garzik if (speed < 2) 1247c6fd2807SJeff Garzik return 0; 1248c6fd2807SJeff Garzik if (speed > 2) 1249c6fd2807SJeff Garzik return 1; 1250c6fd2807SJeff Garzik 1251c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1252c6fd2807SJeff Garzik 1253c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1254c6fd2807SJeff Garzik pio = adev->id[ATA_ID_EIDE_PIO]; 1255c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1256c6fd2807SJeff Garzik if (pio) { 1257c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1258c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1259c6fd2807SJeff Garzik return 1; 1260c6fd2807SJeff Garzik return 0; 1261c6fd2807SJeff Garzik } 1262c6fd2807SJeff Garzik } 1263c6fd2807SJeff Garzik return 0; 1264c6fd2807SJeff Garzik } 1265c6fd2807SJeff Garzik 1266c6fd2807SJeff Garzik /** 1267c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1268c6fd2807SJeff Garzik * @dev: target device 1269c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1270bff04647STejun Heo * @flags: ATA_READID_* flags 1271c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1272c6fd2807SJeff Garzik * 1273c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1274c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1275c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1276c6fd2807SJeff Garzik * for pre-ATA4 drives. 1277c6fd2807SJeff Garzik * 1278c6fd2807SJeff Garzik * LOCKING: 1279c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1280c6fd2807SJeff Garzik * 1281c6fd2807SJeff Garzik * RETURNS: 1282c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1283c6fd2807SJeff Garzik */ 1284c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1285bff04647STejun Heo unsigned int flags, u16 *id) 1286c6fd2807SJeff Garzik { 1287c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1288c6fd2807SJeff Garzik unsigned int class = *p_class; 1289c6fd2807SJeff Garzik struct ata_taskfile tf; 1290c6fd2807SJeff Garzik unsigned int err_mask = 0; 1291c6fd2807SJeff Garzik const char *reason; 1292c6fd2807SJeff Garzik int rc; 1293c6fd2807SJeff Garzik 1294c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1295c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n", 1296c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1297c6fd2807SJeff Garzik 1298c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1299c6fd2807SJeff Garzik 1300c6fd2807SJeff Garzik retry: 1301c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1302c6fd2807SJeff Garzik 1303c6fd2807SJeff Garzik switch (class) { 1304c6fd2807SJeff Garzik case ATA_DEV_ATA: 1305c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1306c6fd2807SJeff Garzik break; 1307c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1308c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1309c6fd2807SJeff Garzik break; 1310c6fd2807SJeff Garzik default: 1311c6fd2807SJeff Garzik rc = -ENODEV; 1312c6fd2807SJeff Garzik reason = "unsupported class"; 1313c6fd2807SJeff Garzik goto err_out; 1314c6fd2807SJeff Garzik } 1315c6fd2807SJeff Garzik 1316c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 1317c6fd2807SJeff Garzik 131855a8e2c8STejun Heo /* presence detection using polling IDENTIFY? */ 131955a8e2c8STejun Heo if (flags & ATA_READID_DETECT) 132055a8e2c8STejun Heo tf.flags |= ATA_TFLAG_POLLING; 132155a8e2c8STejun Heo 1322c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1323c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1324c6fd2807SJeff Garzik if (err_mask) { 132555a8e2c8STejun Heo if ((flags & ATA_READID_DETECT) && 132655a8e2c8STejun Heo (err_mask & AC_ERR_NODEV_HINT)) { 132755a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 132855a8e2c8STejun Heo ap->id, dev->devno); 132955a8e2c8STejun Heo return -ENOENT; 133055a8e2c8STejun Heo } 133155a8e2c8STejun Heo 1332c6fd2807SJeff Garzik rc = -EIO; 1333c6fd2807SJeff Garzik reason = "I/O error"; 1334c6fd2807SJeff Garzik goto err_out; 1335c6fd2807SJeff Garzik } 1336c6fd2807SJeff Garzik 1337c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1338c6fd2807SJeff Garzik 1339c6fd2807SJeff Garzik /* sanity check */ 1340c6fd2807SJeff Garzik rc = -EINVAL; 1341c6fd2807SJeff Garzik reason = "device reports illegal type"; 13424a3381feSJeff Garzik 13434a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 13444a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 13454a3381feSJeff Garzik goto err_out; 13464a3381feSJeff Garzik } else { 13474a3381feSJeff Garzik if (ata_id_is_ata(id)) 1348c6fd2807SJeff Garzik goto err_out; 1349c6fd2807SJeff Garzik } 1350c6fd2807SJeff Garzik 1351bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1352c6fd2807SJeff Garzik /* 1353c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1354c6fd2807SJeff Garzik * SRST RESET 1355c6fd2807SJeff Garzik * IDENTIFY 1356c6fd2807SJeff Garzik * INITIALIZE DEVICE PARAMETERS 1357c6fd2807SJeff Garzik * anything else.. 1358c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 1359c6fd2807SJeff Garzik */ 1360c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1361c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1362c6fd2807SJeff Garzik if (err_mask) { 1363c6fd2807SJeff Garzik rc = -EIO; 1364c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1365c6fd2807SJeff Garzik goto err_out; 1366c6fd2807SJeff Garzik } 1367c6fd2807SJeff Garzik 1368c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1369c6fd2807SJeff Garzik * changed. reread the identify device info. 1370c6fd2807SJeff Garzik */ 1371bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1372c6fd2807SJeff Garzik goto retry; 1373c6fd2807SJeff Garzik } 1374c6fd2807SJeff Garzik } 1375c6fd2807SJeff Garzik 1376c6fd2807SJeff Garzik *p_class = class; 1377c6fd2807SJeff Garzik 1378c6fd2807SJeff Garzik return 0; 1379c6fd2807SJeff Garzik 1380c6fd2807SJeff Garzik err_out: 1381c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1382c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1383c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1384c6fd2807SJeff Garzik return rc; 1385c6fd2807SJeff Garzik } 1386c6fd2807SJeff Garzik 1387c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1388c6fd2807SJeff Garzik { 1389c6fd2807SJeff Garzik return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1390c6fd2807SJeff Garzik } 1391c6fd2807SJeff Garzik 1392c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1393c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1394c6fd2807SJeff Garzik { 1395c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1396c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1397c6fd2807SJeff Garzik 1398c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1399c6fd2807SJeff Garzik desc[0] = '\0'; 1400c6fd2807SJeff Garzik return; 1401c6fd2807SJeff Garzik } 14026919a0a6SAlan Cox if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { 14036919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 14046919a0a6SAlan Cox return; 14056919a0a6SAlan Cox } 1406c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1407cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1408c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1409c6fd2807SJeff Garzik } 1410c6fd2807SJeff Garzik 1411c6fd2807SJeff Garzik if (hdepth >= ddepth) 1412c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1413c6fd2807SJeff Garzik else 1414c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1415c6fd2807SJeff Garzik } 1416c6fd2807SJeff Garzik 1417c6fd2807SJeff Garzik static void ata_set_port_max_cmd_len(struct ata_port *ap) 1418c6fd2807SJeff Garzik { 1419c6fd2807SJeff Garzik int i; 1420c6fd2807SJeff Garzik 1421cca3974eSJeff Garzik if (ap->scsi_host) { 1422cca3974eSJeff Garzik unsigned int len = 0; 1423cca3974eSJeff Garzik 1424c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1425cca3974eSJeff Garzik len = max(len, ap->device[i].cdb_len); 1426cca3974eSJeff Garzik 1427cca3974eSJeff Garzik ap->scsi_host->max_cmd_len = len; 1428c6fd2807SJeff Garzik } 1429c6fd2807SJeff Garzik } 1430c6fd2807SJeff Garzik 1431c6fd2807SJeff Garzik /** 1432c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1433c6fd2807SJeff Garzik * @dev: Target device to configure 1434c6fd2807SJeff Garzik * 1435c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1436c6fd2807SJeff Garzik * driver specific fixups are also applied. 1437c6fd2807SJeff Garzik * 1438c6fd2807SJeff Garzik * LOCKING: 1439c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1440c6fd2807SJeff Garzik * 1441c6fd2807SJeff Garzik * RETURNS: 1442c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1443c6fd2807SJeff Garzik */ 1444efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1445c6fd2807SJeff Garzik { 1446c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1447efdaedc4STejun Heo int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO; 1448c6fd2807SJeff Garzik const u16 *id = dev->id; 1449c6fd2807SJeff Garzik unsigned int xfer_mask; 1450b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 1451c6fd2807SJeff Garzik int rc; 1452c6fd2807SJeff Garzik 1453c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 1454c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1455c6fd2807SJeff Garzik "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n", 1456c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1457c6fd2807SJeff Garzik return 0; 1458c6fd2807SJeff Garzik } 1459c6fd2807SJeff Garzik 1460c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1461c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n", 1462c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1463c6fd2807SJeff Garzik 1464c6fd2807SJeff Garzik /* print device capabilities */ 1465c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1466c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1467c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1468c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1469c6fd2807SJeff Garzik __FUNCTION__, 1470c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1471c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1472c6fd2807SJeff Garzik 1473c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1474c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1475c6fd2807SJeff Garzik dev->max_sectors = 0; 1476c6fd2807SJeff Garzik dev->cdb_len = 0; 1477c6fd2807SJeff Garzik dev->n_sectors = 0; 1478c6fd2807SJeff Garzik dev->cylinders = 0; 1479c6fd2807SJeff Garzik dev->heads = 0; 1480c6fd2807SJeff Garzik dev->sectors = 0; 1481c6fd2807SJeff Garzik 1482c6fd2807SJeff Garzik /* 1483c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1484c6fd2807SJeff Garzik */ 1485c6fd2807SJeff Garzik 1486c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1487c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1488c6fd2807SJeff Garzik 1489c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1490c6fd2807SJeff Garzik ata_dump_id(id); 1491c6fd2807SJeff Garzik 1492c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1493c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1494b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1495b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 1496b352e57dSAlan Cox ata_dev_printk(dev, KERN_WARNING, "ata%u: device %u supports DRM functions and may not be fully accessable.\n", 1497b352e57dSAlan Cox ap->id, dev->devno); 1498b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1499b352e57dSAlan Cox } 1500b352e57dSAlan Cox else 1501b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1502b352e57dSAlan Cox 1503c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1504c6fd2807SJeff Garzik 1505c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1506c6fd2807SJeff Garzik const char *lba_desc; 1507c6fd2807SJeff Garzik char ncq_desc[20]; 1508c6fd2807SJeff Garzik 1509c6fd2807SJeff Garzik lba_desc = "LBA"; 1510c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1511c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1512c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1513c6fd2807SJeff Garzik lba_desc = "LBA48"; 15146fc49adbSTejun Heo 15156fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 15166fc49adbSTejun Heo ata_id_has_flush_ext(id)) 15176fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1518c6fd2807SJeff Garzik } 1519c6fd2807SJeff Garzik 1520c6fd2807SJeff Garzik /* config NCQ */ 1521c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1522c6fd2807SJeff Garzik 1523c6fd2807SJeff Garzik /* print device info to dmesg */ 1524c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1525b352e57dSAlan Cox ata_dev_printk(dev, KERN_INFO, "%s, " 1526c6fd2807SJeff Garzik "max %s, %Lu sectors: %s %s\n", 1527b352e57dSAlan Cox revbuf, 1528c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1529c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 1530c6fd2807SJeff Garzik lba_desc, ncq_desc); 1531c6fd2807SJeff Garzik } else { 1532c6fd2807SJeff Garzik /* CHS */ 1533c6fd2807SJeff Garzik 1534c6fd2807SJeff Garzik /* Default translation */ 1535c6fd2807SJeff Garzik dev->cylinders = id[1]; 1536c6fd2807SJeff Garzik dev->heads = id[3]; 1537c6fd2807SJeff Garzik dev->sectors = id[6]; 1538c6fd2807SJeff Garzik 1539c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 1540c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 1541c6fd2807SJeff Garzik dev->cylinders = id[54]; 1542c6fd2807SJeff Garzik dev->heads = id[55]; 1543c6fd2807SJeff Garzik dev->sectors = id[56]; 1544c6fd2807SJeff Garzik } 1545c6fd2807SJeff Garzik 1546c6fd2807SJeff Garzik /* print device info to dmesg */ 1547c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1548b352e57dSAlan Cox ata_dev_printk(dev, KERN_INFO, "%s, " 1549c6fd2807SJeff Garzik "max %s, %Lu sectors: CHS %u/%u/%u\n", 1550b352e57dSAlan Cox revbuf, 1551c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1552c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 1553c6fd2807SJeff Garzik dev->cylinders, dev->heads, 1554c6fd2807SJeff Garzik dev->sectors); 1555c6fd2807SJeff Garzik } 1556c6fd2807SJeff Garzik 1557c6fd2807SJeff Garzik if (dev->id[59] & 0x100) { 1558c6fd2807SJeff Garzik dev->multi_count = dev->id[59] & 0xff; 1559c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1560c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1561c6fd2807SJeff Garzik "ata%u: dev %u multi count %u\n", 1562c6fd2807SJeff Garzik ap->id, dev->devno, dev->multi_count); 1563c6fd2807SJeff Garzik } 1564c6fd2807SJeff Garzik 1565c6fd2807SJeff Garzik dev->cdb_len = 16; 1566c6fd2807SJeff Garzik } 1567c6fd2807SJeff Garzik 1568c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 1569c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 1570c6fd2807SJeff Garzik char *cdb_intr_string = ""; 1571c6fd2807SJeff Garzik 1572c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 1573c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 1574c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1575c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1576c6fd2807SJeff Garzik "unsupported CDB len\n"); 1577c6fd2807SJeff Garzik rc = -EINVAL; 1578c6fd2807SJeff Garzik goto err_out_nosup; 1579c6fd2807SJeff Garzik } 1580c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 1581c6fd2807SJeff Garzik 1582c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 1583c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 1584c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 1585c6fd2807SJeff Garzik } 1586c6fd2807SJeff Garzik 1587c6fd2807SJeff Garzik /* print device info to dmesg */ 1588c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1589c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", 1590c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1591c6fd2807SJeff Garzik cdb_intr_string); 1592c6fd2807SJeff Garzik } 1593c6fd2807SJeff Garzik 1594914ed354STejun Heo /* determine max_sectors */ 1595914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 1596914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 1597914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 1598914ed354STejun Heo 159993590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 160093590859SAlan Cox /* Let the user know. We don't want to disallow opens for 160193590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 160293590859SAlan Cox idiot */ 160393590859SAlan Cox if (print_info) { 160493590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 160593590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 160693590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 160793590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 160893590859SAlan Cox } 160993590859SAlan Cox } 161093590859SAlan Cox 1611c6fd2807SJeff Garzik ata_set_port_max_cmd_len(ap); 1612c6fd2807SJeff Garzik 1613c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 1614c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 1615c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1616c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1617c6fd2807SJeff Garzik "applying bridge limits\n"); 1618c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 1619c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 1620c6fd2807SJeff Garzik } 1621c6fd2807SJeff Garzik 1622c6fd2807SJeff Garzik if (ap->ops->dev_config) 1623c6fd2807SJeff Garzik ap->ops->dev_config(ap, dev); 1624c6fd2807SJeff Garzik 1625c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1626c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 1627c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 1628c6fd2807SJeff Garzik return 0; 1629c6fd2807SJeff Garzik 1630c6fd2807SJeff Garzik err_out_nosup: 1631c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1632c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1633c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 1634c6fd2807SJeff Garzik return rc; 1635c6fd2807SJeff Garzik } 1636c6fd2807SJeff Garzik 1637c6fd2807SJeff Garzik /** 1638c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 1639c6fd2807SJeff Garzik * @ap: Bus to probe 1640c6fd2807SJeff Garzik * 1641c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 1642c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 1643c6fd2807SJeff Garzik * the bus. 1644c6fd2807SJeff Garzik * 1645c6fd2807SJeff Garzik * LOCKING: 1646c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1647c6fd2807SJeff Garzik * 1648c6fd2807SJeff Garzik * RETURNS: 1649c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 1650c6fd2807SJeff Garzik */ 1651c6fd2807SJeff Garzik 1652c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 1653c6fd2807SJeff Garzik { 1654c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 1655c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 1656c6fd2807SJeff Garzik int i, rc, down_xfermask; 1657c6fd2807SJeff Garzik struct ata_device *dev; 1658c6fd2807SJeff Garzik 1659c6fd2807SJeff Garzik ata_port_probe(ap); 1660c6fd2807SJeff Garzik 1661c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1662c6fd2807SJeff Garzik tries[i] = ATA_PROBE_MAX_TRIES; 1663c6fd2807SJeff Garzik 1664c6fd2807SJeff Garzik retry: 1665c6fd2807SJeff Garzik down_xfermask = 0; 1666c6fd2807SJeff Garzik 1667c6fd2807SJeff Garzik /* reset and determine device classes */ 1668c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 1669c6fd2807SJeff Garzik 1670c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1671c6fd2807SJeff Garzik dev = &ap->device[i]; 1672c6fd2807SJeff Garzik 1673c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 1674c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 1675c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 1676c6fd2807SJeff Garzik else 1677c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 1678c6fd2807SJeff Garzik 1679c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 1680c6fd2807SJeff Garzik } 1681c6fd2807SJeff Garzik 1682c6fd2807SJeff Garzik ata_port_probe(ap); 1683c6fd2807SJeff Garzik 1684c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 1685c6fd2807SJeff Garzik state is undefined. Record the mode */ 1686c6fd2807SJeff Garzik 1687c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1688c6fd2807SJeff Garzik ap->device[i].pio_mode = XFER_PIO_0; 1689c6fd2807SJeff Garzik 1690c6fd2807SJeff Garzik /* read IDENTIFY page and configure devices */ 1691c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1692c6fd2807SJeff Garzik dev = &ap->device[i]; 1693c6fd2807SJeff Garzik 1694c6fd2807SJeff Garzik if (tries[i]) 1695c6fd2807SJeff Garzik dev->class = classes[i]; 1696c6fd2807SJeff Garzik 1697c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 1698c6fd2807SJeff Garzik continue; 1699c6fd2807SJeff Garzik 1700bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 1701bff04647STejun Heo dev->id); 1702c6fd2807SJeff Garzik if (rc) 1703c6fd2807SJeff Garzik goto fail; 1704c6fd2807SJeff Garzik 1705efdaedc4STejun Heo ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; 1706efdaedc4STejun Heo rc = ata_dev_configure(dev); 1707efdaedc4STejun Heo ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 1708c6fd2807SJeff Garzik if (rc) 1709c6fd2807SJeff Garzik goto fail; 1710c6fd2807SJeff Garzik } 1711c6fd2807SJeff Garzik 1712c6fd2807SJeff Garzik /* configure transfer mode */ 1713c6fd2807SJeff Garzik rc = ata_set_mode(ap, &dev); 1714c6fd2807SJeff Garzik if (rc) { 1715c6fd2807SJeff Garzik down_xfermask = 1; 1716c6fd2807SJeff Garzik goto fail; 1717c6fd2807SJeff Garzik } 1718c6fd2807SJeff Garzik 1719c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1720c6fd2807SJeff Garzik if (ata_dev_enabled(&ap->device[i])) 1721c6fd2807SJeff Garzik return 0; 1722c6fd2807SJeff Garzik 1723c6fd2807SJeff Garzik /* no device present, disable port */ 1724c6fd2807SJeff Garzik ata_port_disable(ap); 1725c6fd2807SJeff Garzik ap->ops->port_disable(ap); 1726c6fd2807SJeff Garzik return -ENODEV; 1727c6fd2807SJeff Garzik 1728c6fd2807SJeff Garzik fail: 1729c6fd2807SJeff Garzik switch (rc) { 1730c6fd2807SJeff Garzik case -EINVAL: 1731c6fd2807SJeff Garzik case -ENODEV: 1732c6fd2807SJeff Garzik tries[dev->devno] = 0; 1733c6fd2807SJeff Garzik break; 1734c6fd2807SJeff Garzik case -EIO: 1735c6fd2807SJeff Garzik sata_down_spd_limit(ap); 1736c6fd2807SJeff Garzik /* fall through */ 1737c6fd2807SJeff Garzik default: 1738c6fd2807SJeff Garzik tries[dev->devno]--; 1739c6fd2807SJeff Garzik if (down_xfermask && 1740c6fd2807SJeff Garzik ata_down_xfermask_limit(dev, tries[dev->devno] == 1)) 1741c6fd2807SJeff Garzik tries[dev->devno] = 0; 1742c6fd2807SJeff Garzik } 1743c6fd2807SJeff Garzik 1744c6fd2807SJeff Garzik if (!tries[dev->devno]) { 1745c6fd2807SJeff Garzik ata_down_xfermask_limit(dev, 1); 1746c6fd2807SJeff Garzik ata_dev_disable(dev); 1747c6fd2807SJeff Garzik } 1748c6fd2807SJeff Garzik 1749c6fd2807SJeff Garzik goto retry; 1750c6fd2807SJeff Garzik } 1751c6fd2807SJeff Garzik 1752c6fd2807SJeff Garzik /** 1753c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 1754c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 1755c6fd2807SJeff Garzik * 1756c6fd2807SJeff Garzik * Modify @ap data structure such that the system 1757c6fd2807SJeff Garzik * thinks that the entire port is enabled. 1758c6fd2807SJeff Garzik * 1759cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 1760c6fd2807SJeff Garzik * serialization. 1761c6fd2807SJeff Garzik */ 1762c6fd2807SJeff Garzik 1763c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 1764c6fd2807SJeff Garzik { 1765c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 1766c6fd2807SJeff Garzik } 1767c6fd2807SJeff Garzik 1768c6fd2807SJeff Garzik /** 1769c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 1770c6fd2807SJeff Garzik * @ap: SATA port to printk link status about 1771c6fd2807SJeff Garzik * 1772c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 1773c6fd2807SJeff Garzik * 1774c6fd2807SJeff Garzik * LOCKING: 1775c6fd2807SJeff Garzik * None. 1776c6fd2807SJeff Garzik */ 1777c6fd2807SJeff Garzik static void sata_print_link_status(struct ata_port *ap) 1778c6fd2807SJeff Garzik { 1779c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 1780c6fd2807SJeff Garzik 1781c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_STATUS, &sstatus)) 1782c6fd2807SJeff Garzik return; 1783c6fd2807SJeff Garzik sata_scr_read(ap, SCR_CONTROL, &scontrol); 1784c6fd2807SJeff Garzik 1785c6fd2807SJeff Garzik if (ata_port_online(ap)) { 1786c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 1787c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1788c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 1789c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 1790c6fd2807SJeff Garzik } else { 1791c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1792c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 1793c6fd2807SJeff Garzik sstatus, scontrol); 1794c6fd2807SJeff Garzik } 1795c6fd2807SJeff Garzik } 1796c6fd2807SJeff Garzik 1797c6fd2807SJeff Garzik /** 1798c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 1799c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 1800c6fd2807SJeff Garzik * 1801c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 1802c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 1803c6fd2807SJeff Garzik * clear any reset condition. 1804c6fd2807SJeff Garzik * 1805c6fd2807SJeff Garzik * LOCKING: 1806c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1807c6fd2807SJeff Garzik * 1808c6fd2807SJeff Garzik */ 1809c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 1810c6fd2807SJeff Garzik { 1811c6fd2807SJeff Garzik u32 sstatus; 1812c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 1813c6fd2807SJeff Garzik 1814c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 1815c6fd2807SJeff Garzik /* issue phy wake/reset */ 1816c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x301); 1817c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 1818c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 1819c6fd2807SJeff Garzik mdelay(1); 1820c6fd2807SJeff Garzik } 1821c6fd2807SJeff Garzik /* phy wake/clear reset */ 1822c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x300); 1823c6fd2807SJeff Garzik 1824c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 1825c6fd2807SJeff Garzik do { 1826c6fd2807SJeff Garzik msleep(200); 1827c6fd2807SJeff Garzik sata_scr_read(ap, SCR_STATUS, &sstatus); 1828c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 1829c6fd2807SJeff Garzik break; 1830c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 1831c6fd2807SJeff Garzik 1832c6fd2807SJeff Garzik /* print link status */ 1833c6fd2807SJeff Garzik sata_print_link_status(ap); 1834c6fd2807SJeff Garzik 1835c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 1836c6fd2807SJeff Garzik if (!ata_port_offline(ap)) 1837c6fd2807SJeff Garzik ata_port_probe(ap); 1838c6fd2807SJeff Garzik else 1839c6fd2807SJeff Garzik ata_port_disable(ap); 1840c6fd2807SJeff Garzik 1841c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 1842c6fd2807SJeff Garzik return; 1843c6fd2807SJeff Garzik 1844c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 1845c6fd2807SJeff Garzik ata_port_disable(ap); 1846c6fd2807SJeff Garzik return; 1847c6fd2807SJeff Garzik } 1848c6fd2807SJeff Garzik 1849c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 1850c6fd2807SJeff Garzik } 1851c6fd2807SJeff Garzik 1852c6fd2807SJeff Garzik /** 1853c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 1854c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 1855c6fd2807SJeff Garzik * 1856c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 1857c6fd2807SJeff Garzik * the bus for devices. 1858c6fd2807SJeff Garzik * 1859c6fd2807SJeff Garzik * LOCKING: 1860c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1861c6fd2807SJeff Garzik * 1862c6fd2807SJeff Garzik */ 1863c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 1864c6fd2807SJeff Garzik { 1865c6fd2807SJeff Garzik __sata_phy_reset(ap); 1866c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 1867c6fd2807SJeff Garzik return; 1868c6fd2807SJeff Garzik ata_bus_reset(ap); 1869c6fd2807SJeff Garzik } 1870c6fd2807SJeff Garzik 1871c6fd2807SJeff Garzik /** 1872c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 1873c6fd2807SJeff Garzik * @adev: device 1874c6fd2807SJeff Garzik * 1875c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 1876c6fd2807SJeff Garzik * present NULL is returned 1877c6fd2807SJeff Garzik */ 1878c6fd2807SJeff Garzik 1879c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 1880c6fd2807SJeff Garzik { 1881c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 1882c6fd2807SJeff Garzik struct ata_device *pair = &ap->device[1 - adev->devno]; 1883c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 1884c6fd2807SJeff Garzik return NULL; 1885c6fd2807SJeff Garzik return pair; 1886c6fd2807SJeff Garzik } 1887c6fd2807SJeff Garzik 1888c6fd2807SJeff Garzik /** 1889c6fd2807SJeff Garzik * ata_port_disable - Disable port. 1890c6fd2807SJeff Garzik * @ap: Port to be disabled. 1891c6fd2807SJeff Garzik * 1892c6fd2807SJeff Garzik * Modify @ap data structure such that the system 1893c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 1894c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 1895c6fd2807SJeff Garzik * on this port. 1896c6fd2807SJeff Garzik * 1897cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 1898c6fd2807SJeff Garzik * serialization. 1899c6fd2807SJeff Garzik */ 1900c6fd2807SJeff Garzik 1901c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 1902c6fd2807SJeff Garzik { 1903c6fd2807SJeff Garzik ap->device[0].class = ATA_DEV_NONE; 1904c6fd2807SJeff Garzik ap->device[1].class = ATA_DEV_NONE; 1905c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 1906c6fd2807SJeff Garzik } 1907c6fd2807SJeff Garzik 1908c6fd2807SJeff Garzik /** 1909c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 1910c6fd2807SJeff Garzik * @ap: Port to adjust SATA spd limit for 1911c6fd2807SJeff Garzik * 1912c6fd2807SJeff Garzik * Adjust SATA spd limit of @ap downward. Note that this 1913c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 1914c6fd2807SJeff Garzik * using sata_set_spd(). 1915c6fd2807SJeff Garzik * 1916c6fd2807SJeff Garzik * LOCKING: 1917c6fd2807SJeff Garzik * Inherited from caller. 1918c6fd2807SJeff Garzik * 1919c6fd2807SJeff Garzik * RETURNS: 1920c6fd2807SJeff Garzik * 0 on success, negative errno on failure 1921c6fd2807SJeff Garzik */ 1922c6fd2807SJeff Garzik int sata_down_spd_limit(struct ata_port *ap) 1923c6fd2807SJeff Garzik { 1924c6fd2807SJeff Garzik u32 sstatus, spd, mask; 1925c6fd2807SJeff Garzik int rc, highbit; 1926c6fd2807SJeff Garzik 1927c6fd2807SJeff Garzik rc = sata_scr_read(ap, SCR_STATUS, &sstatus); 1928c6fd2807SJeff Garzik if (rc) 1929c6fd2807SJeff Garzik return rc; 1930c6fd2807SJeff Garzik 1931c6fd2807SJeff Garzik mask = ap->sata_spd_limit; 1932c6fd2807SJeff Garzik if (mask <= 1) 1933c6fd2807SJeff Garzik return -EINVAL; 1934c6fd2807SJeff Garzik highbit = fls(mask) - 1; 1935c6fd2807SJeff Garzik mask &= ~(1 << highbit); 1936c6fd2807SJeff Garzik 1937c6fd2807SJeff Garzik spd = (sstatus >> 4) & 0xf; 1938c6fd2807SJeff Garzik if (spd <= 1) 1939c6fd2807SJeff Garzik return -EINVAL; 1940c6fd2807SJeff Garzik spd--; 1941c6fd2807SJeff Garzik mask &= (1 << spd) - 1; 1942c6fd2807SJeff Garzik if (!mask) 1943c6fd2807SJeff Garzik return -EINVAL; 1944c6fd2807SJeff Garzik 1945c6fd2807SJeff Garzik ap->sata_spd_limit = mask; 1946c6fd2807SJeff Garzik 1947c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", 1948c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 1949c6fd2807SJeff Garzik 1950c6fd2807SJeff Garzik return 0; 1951c6fd2807SJeff Garzik } 1952c6fd2807SJeff Garzik 1953c6fd2807SJeff Garzik static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) 1954c6fd2807SJeff Garzik { 1955c6fd2807SJeff Garzik u32 spd, limit; 1956c6fd2807SJeff Garzik 1957c6fd2807SJeff Garzik if (ap->sata_spd_limit == UINT_MAX) 1958c6fd2807SJeff Garzik limit = 0; 1959c6fd2807SJeff Garzik else 1960c6fd2807SJeff Garzik limit = fls(ap->sata_spd_limit); 1961c6fd2807SJeff Garzik 1962c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 1963c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 1964c6fd2807SJeff Garzik 1965c6fd2807SJeff Garzik return spd != limit; 1966c6fd2807SJeff Garzik } 1967c6fd2807SJeff Garzik 1968c6fd2807SJeff Garzik /** 1969c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 1970c6fd2807SJeff Garzik * @ap: Port in question 1971c6fd2807SJeff Garzik * 1972c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 1973c6fd2807SJeff Garzik * @ap->sata_spd_limit. This function is used to determine 1974c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 1975c6fd2807SJeff Garzik * configuration. 1976c6fd2807SJeff Garzik * 1977c6fd2807SJeff Garzik * LOCKING: 1978c6fd2807SJeff Garzik * Inherited from caller. 1979c6fd2807SJeff Garzik * 1980c6fd2807SJeff Garzik * RETURNS: 1981c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 1982c6fd2807SJeff Garzik */ 1983c6fd2807SJeff Garzik int sata_set_spd_needed(struct ata_port *ap) 1984c6fd2807SJeff Garzik { 1985c6fd2807SJeff Garzik u32 scontrol; 1986c6fd2807SJeff Garzik 1987c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) 1988c6fd2807SJeff Garzik return 0; 1989c6fd2807SJeff Garzik 1990c6fd2807SJeff Garzik return __sata_set_spd_needed(ap, &scontrol); 1991c6fd2807SJeff Garzik } 1992c6fd2807SJeff Garzik 1993c6fd2807SJeff Garzik /** 1994c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 1995c6fd2807SJeff Garzik * @ap: Port to set SATA spd for 1996c6fd2807SJeff Garzik * 1997c6fd2807SJeff Garzik * Set SATA spd of @ap according to sata_spd_limit. 1998c6fd2807SJeff Garzik * 1999c6fd2807SJeff Garzik * LOCKING: 2000c6fd2807SJeff Garzik * Inherited from caller. 2001c6fd2807SJeff Garzik * 2002c6fd2807SJeff Garzik * RETURNS: 2003c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2004c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2005c6fd2807SJeff Garzik */ 2006c6fd2807SJeff Garzik int sata_set_spd(struct ata_port *ap) 2007c6fd2807SJeff Garzik { 2008c6fd2807SJeff Garzik u32 scontrol; 2009c6fd2807SJeff Garzik int rc; 2010c6fd2807SJeff Garzik 2011c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2012c6fd2807SJeff Garzik return rc; 2013c6fd2807SJeff Garzik 2014c6fd2807SJeff Garzik if (!__sata_set_spd_needed(ap, &scontrol)) 2015c6fd2807SJeff Garzik return 0; 2016c6fd2807SJeff Garzik 2017c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2018c6fd2807SJeff Garzik return rc; 2019c6fd2807SJeff Garzik 2020c6fd2807SJeff Garzik return 1; 2021c6fd2807SJeff Garzik } 2022c6fd2807SJeff Garzik 2023c6fd2807SJeff Garzik /* 2024c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2025c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2026c6fd2807SJeff Garzik */ 2027c6fd2807SJeff Garzik /* 2028b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2029c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2030b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2031b352e57dSAlan Cox * 2032b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2033c6fd2807SJeff Garzik */ 2034c6fd2807SJeff Garzik 2035c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2036c6fd2807SJeff Garzik 2037c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2038c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2039c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2040c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2041c6fd2807SJeff Garzik 2042b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2043b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2044c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2045c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2046c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2047c6fd2807SJeff Garzik 2048c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2049c6fd2807SJeff Garzik 2050c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2051c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2052c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2053c6fd2807SJeff Garzik 2054c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2055c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2056c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2057c6fd2807SJeff Garzik 2058b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2059b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2060c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2061c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2062c6fd2807SJeff Garzik 2063c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2064c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2065c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2066c6fd2807SJeff Garzik 2067c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2068c6fd2807SJeff Garzik 2069c6fd2807SJeff Garzik { 0xFF } 2070c6fd2807SJeff Garzik }; 2071c6fd2807SJeff Garzik 2072c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2073c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2074c6fd2807SJeff Garzik 2075c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2076c6fd2807SJeff Garzik { 2077c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2078c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2079c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2080c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2081c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2082c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2083c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2084c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2085c6fd2807SJeff Garzik } 2086c6fd2807SJeff Garzik 2087c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2088c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2089c6fd2807SJeff Garzik { 2090c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2091c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2092c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2093c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2094c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2095c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2096c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2097c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2098c6fd2807SJeff Garzik } 2099c6fd2807SJeff Garzik 2100c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2101c6fd2807SJeff Garzik { 2102c6fd2807SJeff Garzik const struct ata_timing *t; 2103c6fd2807SJeff Garzik 2104c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2105c6fd2807SJeff Garzik if (t->mode == 0xFF) 2106c6fd2807SJeff Garzik return NULL; 2107c6fd2807SJeff Garzik return t; 2108c6fd2807SJeff Garzik } 2109c6fd2807SJeff Garzik 2110c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2111c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2112c6fd2807SJeff Garzik { 2113c6fd2807SJeff Garzik const struct ata_timing *s; 2114c6fd2807SJeff Garzik struct ata_timing p; 2115c6fd2807SJeff Garzik 2116c6fd2807SJeff Garzik /* 2117c6fd2807SJeff Garzik * Find the mode. 2118c6fd2807SJeff Garzik */ 2119c6fd2807SJeff Garzik 2120c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2121c6fd2807SJeff Garzik return -EINVAL; 2122c6fd2807SJeff Garzik 2123c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2124c6fd2807SJeff Garzik 2125c6fd2807SJeff Garzik /* 2126c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2127c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2128c6fd2807SJeff Garzik */ 2129c6fd2807SJeff Garzik 2130c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2131c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2132c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2133c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2134c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2135c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2136c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2137c6fd2807SJeff Garzik } 2138c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2139c6fd2807SJeff Garzik } 2140c6fd2807SJeff Garzik 2141c6fd2807SJeff Garzik /* 2142c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2143c6fd2807SJeff Garzik */ 2144c6fd2807SJeff Garzik 2145c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2146c6fd2807SJeff Garzik 2147c6fd2807SJeff Garzik /* 2148c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2149c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2150c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2151c6fd2807SJeff Garzik */ 2152c6fd2807SJeff Garzik 2153c6fd2807SJeff Garzik if (speed > XFER_PIO_4) { 2154c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2155c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2156c6fd2807SJeff Garzik } 2157c6fd2807SJeff Garzik 2158c6fd2807SJeff Garzik /* 2159c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2160c6fd2807SJeff Garzik */ 2161c6fd2807SJeff Garzik 2162c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2163c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2164c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2165c6fd2807SJeff Garzik } 2166c6fd2807SJeff Garzik 2167c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2168c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2169c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2170c6fd2807SJeff Garzik } 2171c6fd2807SJeff Garzik 2172c6fd2807SJeff Garzik return 0; 2173c6fd2807SJeff Garzik } 2174c6fd2807SJeff Garzik 2175c6fd2807SJeff Garzik /** 2176c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2177c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2178c6fd2807SJeff Garzik * @force_pio0: Force PIO0 2179c6fd2807SJeff Garzik * 2180c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2181c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2182c6fd2807SJeff Garzik * will apply the limit. 2183c6fd2807SJeff Garzik * 2184c6fd2807SJeff Garzik * LOCKING: 2185c6fd2807SJeff Garzik * Inherited from caller. 2186c6fd2807SJeff Garzik * 2187c6fd2807SJeff Garzik * RETURNS: 2188c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2189c6fd2807SJeff Garzik */ 2190c6fd2807SJeff Garzik int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0) 2191c6fd2807SJeff Garzik { 2192c6fd2807SJeff Garzik unsigned long xfer_mask; 2193c6fd2807SJeff Garzik int highbit; 2194c6fd2807SJeff Garzik 2195c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask, 2196c6fd2807SJeff Garzik dev->udma_mask); 2197c6fd2807SJeff Garzik 2198c6fd2807SJeff Garzik if (!xfer_mask) 2199c6fd2807SJeff Garzik goto fail; 2200c6fd2807SJeff Garzik /* don't gear down to MWDMA from UDMA, go directly to PIO */ 2201c6fd2807SJeff Garzik if (xfer_mask & ATA_MASK_UDMA) 2202c6fd2807SJeff Garzik xfer_mask &= ~ATA_MASK_MWDMA; 2203c6fd2807SJeff Garzik 2204c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 2205c6fd2807SJeff Garzik xfer_mask &= ~(1 << highbit); 2206c6fd2807SJeff Garzik if (force_pio0) 2207c6fd2807SJeff Garzik xfer_mask &= 1 << ATA_SHIFT_PIO; 2208c6fd2807SJeff Garzik if (!xfer_mask) 2209c6fd2807SJeff Garzik goto fail; 2210c6fd2807SJeff Garzik 2211c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2212c6fd2807SJeff Garzik &dev->udma_mask); 2213c6fd2807SJeff Garzik 2214c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n", 2215c6fd2807SJeff Garzik ata_mode_string(xfer_mask)); 2216c6fd2807SJeff Garzik 2217c6fd2807SJeff Garzik return 0; 2218c6fd2807SJeff Garzik 2219c6fd2807SJeff Garzik fail: 2220c6fd2807SJeff Garzik return -EINVAL; 2221c6fd2807SJeff Garzik } 2222c6fd2807SJeff Garzik 2223c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2224c6fd2807SJeff Garzik { 2225baa1e78aSTejun Heo struct ata_eh_context *ehc = &dev->ap->eh_context; 2226c6fd2807SJeff Garzik unsigned int err_mask; 2227c6fd2807SJeff Garzik int rc; 2228c6fd2807SJeff Garzik 2229c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2230c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2231c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2232c6fd2807SJeff Garzik 2233c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 2234c6fd2807SJeff Garzik if (err_mask) { 2235c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2236c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2237c6fd2807SJeff Garzik return -EIO; 2238c6fd2807SJeff Garzik } 2239c6fd2807SJeff Garzik 2240baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2241c6fd2807SJeff Garzik rc = ata_dev_revalidate(dev, 0); 2242baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2243c6fd2807SJeff Garzik if (rc) 2244c6fd2807SJeff Garzik return rc; 2245c6fd2807SJeff Garzik 2246c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2247c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2248c6fd2807SJeff Garzik 2249c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2250c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2251c6fd2807SJeff Garzik return 0; 2252c6fd2807SJeff Garzik } 2253c6fd2807SJeff Garzik 2254c6fd2807SJeff Garzik /** 2255c6fd2807SJeff Garzik * ata_set_mode - Program timings and issue SET FEATURES - XFER 2256c6fd2807SJeff Garzik * @ap: port on which timings will be programmed 2257c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2258c6fd2807SJeff Garzik * 2259c6fd2807SJeff Garzik * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 2260c6fd2807SJeff Garzik * ata_set_mode() fails, pointer to the failing device is 2261c6fd2807SJeff Garzik * returned in @r_failed_dev. 2262c6fd2807SJeff Garzik * 2263c6fd2807SJeff Garzik * LOCKING: 2264c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2265c6fd2807SJeff Garzik * 2266c6fd2807SJeff Garzik * RETURNS: 2267c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2268c6fd2807SJeff Garzik */ 2269c6fd2807SJeff Garzik int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 2270c6fd2807SJeff Garzik { 2271c6fd2807SJeff Garzik struct ata_device *dev; 2272c6fd2807SJeff Garzik int i, rc = 0, used_dma = 0, found = 0; 2273c6fd2807SJeff Garzik 2274c6fd2807SJeff Garzik /* has private set_mode? */ 2275c6fd2807SJeff Garzik if (ap->ops->set_mode) { 2276c6fd2807SJeff Garzik /* FIXME: make ->set_mode handle no device case and 2277c6fd2807SJeff Garzik * return error code and failing device on failure. 2278c6fd2807SJeff Garzik */ 2279c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2280c6fd2807SJeff Garzik if (ata_dev_ready(&ap->device[i])) { 2281c6fd2807SJeff Garzik ap->ops->set_mode(ap); 2282c6fd2807SJeff Garzik break; 2283c6fd2807SJeff Garzik } 2284c6fd2807SJeff Garzik } 2285c6fd2807SJeff Garzik return 0; 2286c6fd2807SJeff Garzik } 2287c6fd2807SJeff Garzik 2288c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2289c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2290c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2291c6fd2807SJeff Garzik 2292c6fd2807SJeff Garzik dev = &ap->device[i]; 2293c6fd2807SJeff Garzik 2294c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2295c6fd2807SJeff Garzik continue; 2296c6fd2807SJeff Garzik 2297c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2298c6fd2807SJeff Garzik 2299c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2300c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2301c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2302c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2303c6fd2807SJeff Garzik 2304c6fd2807SJeff Garzik found = 1; 2305c6fd2807SJeff Garzik if (dev->dma_mode) 2306c6fd2807SJeff Garzik used_dma = 1; 2307c6fd2807SJeff Garzik } 2308c6fd2807SJeff Garzik if (!found) 2309c6fd2807SJeff Garzik goto out; 2310c6fd2807SJeff Garzik 2311c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2312c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2313c6fd2807SJeff Garzik dev = &ap->device[i]; 2314c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2315c6fd2807SJeff Garzik continue; 2316c6fd2807SJeff Garzik 2317c6fd2807SJeff Garzik if (!dev->pio_mode) { 2318c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2319c6fd2807SJeff Garzik rc = -EINVAL; 2320c6fd2807SJeff Garzik goto out; 2321c6fd2807SJeff Garzik } 2322c6fd2807SJeff Garzik 2323c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2324c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2325c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2326c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2327c6fd2807SJeff Garzik } 2328c6fd2807SJeff Garzik 2329c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2330c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2331c6fd2807SJeff Garzik dev = &ap->device[i]; 2332c6fd2807SJeff Garzik 2333c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2334c6fd2807SJeff Garzik continue; 2335c6fd2807SJeff Garzik 2336c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2337c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2338c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2339c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2340c6fd2807SJeff Garzik } 2341c6fd2807SJeff Garzik 2342c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2343c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2344c6fd2807SJeff Garzik dev = &ap->device[i]; 2345c6fd2807SJeff Garzik 2346c6fd2807SJeff Garzik /* don't udpate suspended devices' xfer mode */ 2347c6fd2807SJeff Garzik if (!ata_dev_ready(dev)) 2348c6fd2807SJeff Garzik continue; 2349c6fd2807SJeff Garzik 2350c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2351c6fd2807SJeff Garzik if (rc) 2352c6fd2807SJeff Garzik goto out; 2353c6fd2807SJeff Garzik } 2354c6fd2807SJeff Garzik 2355c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2356c6fd2807SJeff Garzik * host channels are not permitted to do so. 2357c6fd2807SJeff Garzik */ 2358cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2359cca3974eSJeff Garzik ap->host->simplex_claimed = 1; 2360c6fd2807SJeff Garzik 2361c6fd2807SJeff Garzik /* step5: chip specific finalisation */ 2362c6fd2807SJeff Garzik if (ap->ops->post_set_mode) 2363c6fd2807SJeff Garzik ap->ops->post_set_mode(ap); 2364c6fd2807SJeff Garzik 2365c6fd2807SJeff Garzik out: 2366c6fd2807SJeff Garzik if (rc) 2367c6fd2807SJeff Garzik *r_failed_dev = dev; 2368c6fd2807SJeff Garzik return rc; 2369c6fd2807SJeff Garzik } 2370c6fd2807SJeff Garzik 2371c6fd2807SJeff Garzik /** 2372c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 2373c6fd2807SJeff Garzik * @ap: port to which command is being issued 2374c6fd2807SJeff Garzik * @tf: ATA taskfile register set 2375c6fd2807SJeff Garzik * 2376c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 2377c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 2378c6fd2807SJeff Garzik * other threads. 2379c6fd2807SJeff Garzik * 2380c6fd2807SJeff Garzik * LOCKING: 2381cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 2382c6fd2807SJeff Garzik */ 2383c6fd2807SJeff Garzik 2384c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 2385c6fd2807SJeff Garzik const struct ata_taskfile *tf) 2386c6fd2807SJeff Garzik { 2387c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 2388c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 2389c6fd2807SJeff Garzik } 2390c6fd2807SJeff Garzik 2391c6fd2807SJeff Garzik /** 2392c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 2393c6fd2807SJeff Garzik * @ap: port containing status register to be polled 2394c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 2395c6fd2807SJeff Garzik * @tmout: overall timeout 2396c6fd2807SJeff Garzik * 2397c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 2398c6fd2807SJeff Garzik * or a timeout occurs. 2399c6fd2807SJeff Garzik * 2400d1adc1bbSTejun Heo * LOCKING: 2401d1adc1bbSTejun Heo * Kernel thread context (may sleep). 2402d1adc1bbSTejun Heo * 2403d1adc1bbSTejun Heo * RETURNS: 2404d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 2405c6fd2807SJeff Garzik */ 2406d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 2407c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 2408c6fd2807SJeff Garzik { 2409c6fd2807SJeff Garzik unsigned long timer_start, timeout; 2410c6fd2807SJeff Garzik u8 status; 2411c6fd2807SJeff Garzik 2412c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 2413c6fd2807SJeff Garzik timer_start = jiffies; 2414c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 2415d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2416d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2417c6fd2807SJeff Garzik msleep(50); 2418c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 2419c6fd2807SJeff Garzik } 2420c6fd2807SJeff Garzik 2421d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 2422c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 242335aa7a43SJeff Garzik "port is slow to respond, please be patient " 242435aa7a43SJeff Garzik "(Status 0x%x)\n", status); 2425c6fd2807SJeff Garzik 2426c6fd2807SJeff Garzik timeout = timer_start + tmout; 2427d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2428d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2429c6fd2807SJeff Garzik msleep(50); 2430c6fd2807SJeff Garzik status = ata_chk_status(ap); 2431c6fd2807SJeff Garzik } 2432c6fd2807SJeff Garzik 2433d1adc1bbSTejun Heo if (status == 0xff) 2434d1adc1bbSTejun Heo return -ENODEV; 2435d1adc1bbSTejun Heo 2436c6fd2807SJeff Garzik if (status & ATA_BUSY) { 2437c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 243835aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 243935aa7a43SJeff Garzik tmout / HZ, status); 2440d1adc1bbSTejun Heo return -EBUSY; 2441c6fd2807SJeff Garzik } 2442c6fd2807SJeff Garzik 2443c6fd2807SJeff Garzik return 0; 2444c6fd2807SJeff Garzik } 2445c6fd2807SJeff Garzik 2446c6fd2807SJeff Garzik static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) 2447c6fd2807SJeff Garzik { 2448c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2449c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 2450c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 2451c6fd2807SJeff Garzik unsigned long timeout; 2452c6fd2807SJeff Garzik 2453c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 2454c6fd2807SJeff Garzik * BSY bit to clear 2455c6fd2807SJeff Garzik */ 2456c6fd2807SJeff Garzik if (dev0) 2457c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2458c6fd2807SJeff Garzik 2459c6fd2807SJeff Garzik /* if device 1 was found in ata_devchk, wait for 2460c6fd2807SJeff Garzik * register access, then wait for BSY to clear 2461c6fd2807SJeff Garzik */ 2462c6fd2807SJeff Garzik timeout = jiffies + ATA_TMOUT_BOOT; 2463c6fd2807SJeff Garzik while (dev1) { 2464c6fd2807SJeff Garzik u8 nsect, lbal; 2465c6fd2807SJeff Garzik 2466c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2467c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_MMIO) { 2468c6fd2807SJeff Garzik nsect = readb((void __iomem *) ioaddr->nsect_addr); 2469c6fd2807SJeff Garzik lbal = readb((void __iomem *) ioaddr->lbal_addr); 2470c6fd2807SJeff Garzik } else { 2471c6fd2807SJeff Garzik nsect = inb(ioaddr->nsect_addr); 2472c6fd2807SJeff Garzik lbal = inb(ioaddr->lbal_addr); 2473c6fd2807SJeff Garzik } 2474c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 2475c6fd2807SJeff Garzik break; 2476c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) { 2477c6fd2807SJeff Garzik dev1 = 0; 2478c6fd2807SJeff Garzik break; 2479c6fd2807SJeff Garzik } 2480c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 2481c6fd2807SJeff Garzik } 2482c6fd2807SJeff Garzik if (dev1) 2483c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2484c6fd2807SJeff Garzik 2485c6fd2807SJeff Garzik /* is all this really necessary? */ 2486c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2487c6fd2807SJeff Garzik if (dev1) 2488c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2489c6fd2807SJeff Garzik if (dev0) 2490c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2491c6fd2807SJeff Garzik } 2492c6fd2807SJeff Garzik 2493c6fd2807SJeff Garzik static unsigned int ata_bus_softreset(struct ata_port *ap, 2494c6fd2807SJeff Garzik unsigned int devmask) 2495c6fd2807SJeff Garzik { 2496c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2497c6fd2807SJeff Garzik 2498c6fd2807SJeff Garzik DPRINTK("ata%u: bus reset via SRST\n", ap->id); 2499c6fd2807SJeff Garzik 2500c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 2501c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_MMIO) { 2502c6fd2807SJeff Garzik writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 2503c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 2504c6fd2807SJeff Garzik writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); 2505c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 2506c6fd2807SJeff Garzik writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 2507c6fd2807SJeff Garzik } else { 2508c6fd2807SJeff Garzik outb(ap->ctl, ioaddr->ctl_addr); 2509c6fd2807SJeff Garzik udelay(10); 2510c6fd2807SJeff Garzik outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 2511c6fd2807SJeff Garzik udelay(10); 2512c6fd2807SJeff Garzik outb(ap->ctl, ioaddr->ctl_addr); 2513c6fd2807SJeff Garzik } 2514c6fd2807SJeff Garzik 2515c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 2516c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 2517c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 2518c6fd2807SJeff Garzik * between when the ATA command register is written, and then 2519c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 2520c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 2521c6fd2807SJeff Garzik * delay here as well. 2522c6fd2807SJeff Garzik * 2523c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 2524c6fd2807SJeff Garzik */ 2525c6fd2807SJeff Garzik msleep(150); 2526c6fd2807SJeff Garzik 2527c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 2528c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 2529c6fd2807SJeff Garzik * pulldown resistor. 2530c6fd2807SJeff Garzik */ 2531d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 2532d1adc1bbSTejun Heo return 0; 2533c6fd2807SJeff Garzik 2534c6fd2807SJeff Garzik ata_bus_post_reset(ap, devmask); 2535c6fd2807SJeff Garzik 2536c6fd2807SJeff Garzik return 0; 2537c6fd2807SJeff Garzik } 2538c6fd2807SJeff Garzik 2539c6fd2807SJeff Garzik /** 2540c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 2541c6fd2807SJeff Garzik * @ap: port to reset 2542c6fd2807SJeff Garzik * 2543c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 2544c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 2545c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 2546c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 2547c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 2548c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 2549c6fd2807SJeff Garzik * the device is ATA or ATAPI. 2550c6fd2807SJeff Garzik * 2551c6fd2807SJeff Garzik * LOCKING: 2552c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2553cca3974eSJeff Garzik * Obtains host lock. 2554c6fd2807SJeff Garzik * 2555c6fd2807SJeff Garzik * SIDE EFFECTS: 2556c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 2557c6fd2807SJeff Garzik */ 2558c6fd2807SJeff Garzik 2559c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 2560c6fd2807SJeff Garzik { 2561c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2562c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 2563c6fd2807SJeff Garzik u8 err; 2564c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 2565c6fd2807SJeff Garzik 2566c6fd2807SJeff Garzik DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); 2567c6fd2807SJeff Garzik 2568c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 2569c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 2570c6fd2807SJeff Garzik dev0 = 1; 2571c6fd2807SJeff Garzik else { 2572c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 2573c6fd2807SJeff Garzik if (slave_possible) 2574c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 2575c6fd2807SJeff Garzik } 2576c6fd2807SJeff Garzik 2577c6fd2807SJeff Garzik if (dev0) 2578c6fd2807SJeff Garzik devmask |= (1 << 0); 2579c6fd2807SJeff Garzik if (dev1) 2580c6fd2807SJeff Garzik devmask |= (1 << 1); 2581c6fd2807SJeff Garzik 2582c6fd2807SJeff Garzik /* select device 0 again */ 2583c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2584c6fd2807SJeff Garzik 2585c6fd2807SJeff Garzik /* issue bus reset */ 2586c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SRST) 2587c6fd2807SJeff Garzik if (ata_bus_softreset(ap, devmask)) 2588c6fd2807SJeff Garzik goto err_out; 2589c6fd2807SJeff Garzik 2590c6fd2807SJeff Garzik /* 2591c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 2592c6fd2807SJeff Garzik */ 2593c6fd2807SJeff Garzik ap->device[0].class = ata_dev_try_classify(ap, 0, &err); 2594c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 2595c6fd2807SJeff Garzik ap->device[1].class = ata_dev_try_classify(ap, 1, &err); 2596c6fd2807SJeff Garzik 2597c6fd2807SJeff Garzik /* re-enable interrupts */ 2598c6fd2807SJeff Garzik if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ 2599c6fd2807SJeff Garzik ata_irq_on(ap); 2600c6fd2807SJeff Garzik 2601c6fd2807SJeff Garzik /* is double-select really necessary? */ 2602c6fd2807SJeff Garzik if (ap->device[1].class != ATA_DEV_NONE) 2603c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2604c6fd2807SJeff Garzik if (ap->device[0].class != ATA_DEV_NONE) 2605c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2606c6fd2807SJeff Garzik 2607c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 2608c6fd2807SJeff Garzik if ((ap->device[0].class == ATA_DEV_NONE) && 2609c6fd2807SJeff Garzik (ap->device[1].class == ATA_DEV_NONE)) 2610c6fd2807SJeff Garzik goto err_out; 2611c6fd2807SJeff Garzik 2612c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 2613c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 2614c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_MMIO) 2615c6fd2807SJeff Garzik writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 2616c6fd2807SJeff Garzik else 2617c6fd2807SJeff Garzik outb(ap->ctl, ioaddr->ctl_addr); 2618c6fd2807SJeff Garzik } 2619c6fd2807SJeff Garzik 2620c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2621c6fd2807SJeff Garzik return; 2622c6fd2807SJeff Garzik 2623c6fd2807SJeff Garzik err_out: 2624c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 2625c6fd2807SJeff Garzik ap->ops->port_disable(ap); 2626c6fd2807SJeff Garzik 2627c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2628c6fd2807SJeff Garzik } 2629c6fd2807SJeff Garzik 2630c6fd2807SJeff Garzik /** 2631c6fd2807SJeff Garzik * sata_phy_debounce - debounce SATA phy status 2632c6fd2807SJeff Garzik * @ap: ATA port to debounce SATA phy status for 2633c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2634c6fd2807SJeff Garzik * 2635c6fd2807SJeff Garzik * Make sure SStatus of @ap reaches stable state, determined by 2636c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 2637c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 2638c6fd2807SJeff Garzik * beginning of the stable state. Because, after hot unplugging, 2639c6fd2807SJeff Garzik * DET gets stuck at 1 on some controllers, this functions waits 2640c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 2641c6fd2807SJeff Garzik * 2642c6fd2807SJeff Garzik * LOCKING: 2643c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2644c6fd2807SJeff Garzik * 2645c6fd2807SJeff Garzik * RETURNS: 2646c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2647c6fd2807SJeff Garzik */ 2648c6fd2807SJeff Garzik int sata_phy_debounce(struct ata_port *ap, const unsigned long *params) 2649c6fd2807SJeff Garzik { 2650c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 2651c6fd2807SJeff Garzik unsigned long duration = params[1] * HZ / 1000; 2652c6fd2807SJeff Garzik unsigned long timeout = jiffies + params[2] * HZ / 1000; 2653c6fd2807SJeff Garzik unsigned long last_jiffies; 2654c6fd2807SJeff Garzik u32 last, cur; 2655c6fd2807SJeff Garzik int rc; 2656c6fd2807SJeff Garzik 2657c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2658c6fd2807SJeff Garzik return rc; 2659c6fd2807SJeff Garzik cur &= 0xf; 2660c6fd2807SJeff Garzik 2661c6fd2807SJeff Garzik last = cur; 2662c6fd2807SJeff Garzik last_jiffies = jiffies; 2663c6fd2807SJeff Garzik 2664c6fd2807SJeff Garzik while (1) { 2665c6fd2807SJeff Garzik msleep(interval_msec); 2666c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2667c6fd2807SJeff Garzik return rc; 2668c6fd2807SJeff Garzik cur &= 0xf; 2669c6fd2807SJeff Garzik 2670c6fd2807SJeff Garzik /* DET stable? */ 2671c6fd2807SJeff Garzik if (cur == last) { 2672c6fd2807SJeff Garzik if (cur == 1 && time_before(jiffies, timeout)) 2673c6fd2807SJeff Garzik continue; 2674c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 2675c6fd2807SJeff Garzik return 0; 2676c6fd2807SJeff Garzik continue; 2677c6fd2807SJeff Garzik } 2678c6fd2807SJeff Garzik 2679c6fd2807SJeff Garzik /* unstable, start over */ 2680c6fd2807SJeff Garzik last = cur; 2681c6fd2807SJeff Garzik last_jiffies = jiffies; 2682c6fd2807SJeff Garzik 2683c6fd2807SJeff Garzik /* check timeout */ 2684c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) 2685c6fd2807SJeff Garzik return -EBUSY; 2686c6fd2807SJeff Garzik } 2687c6fd2807SJeff Garzik } 2688c6fd2807SJeff Garzik 2689c6fd2807SJeff Garzik /** 2690c6fd2807SJeff Garzik * sata_phy_resume - resume SATA phy 2691c6fd2807SJeff Garzik * @ap: ATA port to resume SATA phy for 2692c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2693c6fd2807SJeff Garzik * 2694c6fd2807SJeff Garzik * Resume SATA phy of @ap and debounce it. 2695c6fd2807SJeff Garzik * 2696c6fd2807SJeff Garzik * LOCKING: 2697c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2698c6fd2807SJeff Garzik * 2699c6fd2807SJeff Garzik * RETURNS: 2700c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2701c6fd2807SJeff Garzik */ 2702c6fd2807SJeff Garzik int sata_phy_resume(struct ata_port *ap, const unsigned long *params) 2703c6fd2807SJeff Garzik { 2704c6fd2807SJeff Garzik u32 scontrol; 2705c6fd2807SJeff Garzik int rc; 2706c6fd2807SJeff Garzik 2707c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2708c6fd2807SJeff Garzik return rc; 2709c6fd2807SJeff Garzik 2710c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 2711c6fd2807SJeff Garzik 2712c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2713c6fd2807SJeff Garzik return rc; 2714c6fd2807SJeff Garzik 2715c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 2716c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 2717c6fd2807SJeff Garzik */ 2718c6fd2807SJeff Garzik msleep(200); 2719c6fd2807SJeff Garzik 2720c6fd2807SJeff Garzik return sata_phy_debounce(ap, params); 2721c6fd2807SJeff Garzik } 2722c6fd2807SJeff Garzik 2723c6fd2807SJeff Garzik static void ata_wait_spinup(struct ata_port *ap) 2724c6fd2807SJeff Garzik { 2725c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2726c6fd2807SJeff Garzik unsigned long end, secs; 2727c6fd2807SJeff Garzik int rc; 2728c6fd2807SJeff Garzik 2729c6fd2807SJeff Garzik /* first, debounce phy if SATA */ 2730c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2731c6fd2807SJeff Garzik rc = sata_phy_debounce(ap, sata_deb_timing_hotplug); 2732c6fd2807SJeff Garzik 2733c6fd2807SJeff Garzik /* if debounced successfully and offline, no need to wait */ 2734c6fd2807SJeff Garzik if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap)) 2735c6fd2807SJeff Garzik return; 2736c6fd2807SJeff Garzik } 2737c6fd2807SJeff Garzik 2738c6fd2807SJeff Garzik /* okay, let's give the drive time to spin up */ 2739c6fd2807SJeff Garzik end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000; 2740c6fd2807SJeff Garzik secs = ((end - jiffies) + HZ - 1) / HZ; 2741c6fd2807SJeff Garzik 2742c6fd2807SJeff Garzik if (time_after(jiffies, end)) 2743c6fd2807SJeff Garzik return; 2744c6fd2807SJeff Garzik 2745c6fd2807SJeff Garzik if (secs > 5) 2746c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "waiting for device to spin up " 2747c6fd2807SJeff Garzik "(%lu secs)\n", secs); 2748c6fd2807SJeff Garzik 2749c6fd2807SJeff Garzik schedule_timeout_uninterruptible(end - jiffies); 2750c6fd2807SJeff Garzik } 2751c6fd2807SJeff Garzik 2752c6fd2807SJeff Garzik /** 2753c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 2754c6fd2807SJeff Garzik * @ap: ATA port to be reset 2755c6fd2807SJeff Garzik * 2756c6fd2807SJeff Garzik * @ap is about to be reset. Initialize it. 2757c6fd2807SJeff Garzik * 2758c6fd2807SJeff Garzik * LOCKING: 2759c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2760c6fd2807SJeff Garzik * 2761c6fd2807SJeff Garzik * RETURNS: 2762c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2763c6fd2807SJeff Garzik */ 2764c6fd2807SJeff Garzik int ata_std_prereset(struct ata_port *ap) 2765c6fd2807SJeff Garzik { 2766c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2767c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 2768c6fd2807SJeff Garzik int rc; 2769c6fd2807SJeff Garzik 2770c6fd2807SJeff Garzik /* handle link resume & hotplug spinup */ 2771c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 2772c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_HRST_TO_RESUME)) 2773c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 2774c6fd2807SJeff Garzik 2775c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) && 2776c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_SKIP_D2H_BSY)) 2777c6fd2807SJeff Garzik ata_wait_spinup(ap); 2778c6fd2807SJeff Garzik 2779c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 2780c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 2781c6fd2807SJeff Garzik return 0; 2782c6fd2807SJeff Garzik 2783c6fd2807SJeff Garzik /* if SATA, resume phy */ 2784c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2785c6fd2807SJeff Garzik rc = sata_phy_resume(ap, timing); 2786c6fd2807SJeff Garzik if (rc && rc != -EOPNOTSUPP) { 2787c6fd2807SJeff Garzik /* phy resume failed */ 2788c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "failed to resume " 2789c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 2790c6fd2807SJeff Garzik return rc; 2791c6fd2807SJeff Garzik } 2792c6fd2807SJeff Garzik } 2793c6fd2807SJeff Garzik 2794c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 2795c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 2796c6fd2807SJeff Garzik */ 2797c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) 2798c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2799c6fd2807SJeff Garzik 2800c6fd2807SJeff Garzik return 0; 2801c6fd2807SJeff Garzik } 2802c6fd2807SJeff Garzik 2803c6fd2807SJeff Garzik /** 2804c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 2805c6fd2807SJeff Garzik * @ap: port to reset 2806c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 2807c6fd2807SJeff Garzik * 2808c6fd2807SJeff Garzik * Reset host port using ATA SRST. 2809c6fd2807SJeff Garzik * 2810c6fd2807SJeff Garzik * LOCKING: 2811c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2812c6fd2807SJeff Garzik * 2813c6fd2807SJeff Garzik * RETURNS: 2814c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2815c6fd2807SJeff Garzik */ 2816c6fd2807SJeff Garzik int ata_std_softreset(struct ata_port *ap, unsigned int *classes) 2817c6fd2807SJeff Garzik { 2818c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 2819c6fd2807SJeff Garzik unsigned int devmask = 0, err_mask; 2820c6fd2807SJeff Garzik u8 err; 2821c6fd2807SJeff Garzik 2822c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 2823c6fd2807SJeff Garzik 2824c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 2825c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 2826c6fd2807SJeff Garzik goto out; 2827c6fd2807SJeff Garzik } 2828c6fd2807SJeff Garzik 2829c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 2830c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 2831c6fd2807SJeff Garzik devmask |= (1 << 0); 2832c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 2833c6fd2807SJeff Garzik devmask |= (1 << 1); 2834c6fd2807SJeff Garzik 2835c6fd2807SJeff Garzik /* select device 0 again */ 2836c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2837c6fd2807SJeff Garzik 2838c6fd2807SJeff Garzik /* issue bus reset */ 2839c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 2840c6fd2807SJeff Garzik err_mask = ata_bus_softreset(ap, devmask); 2841c6fd2807SJeff Garzik if (err_mask) { 2842c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", 2843c6fd2807SJeff Garzik err_mask); 2844c6fd2807SJeff Garzik return -EIO; 2845c6fd2807SJeff Garzik } 2846c6fd2807SJeff Garzik 2847c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 2848c6fd2807SJeff Garzik classes[0] = ata_dev_try_classify(ap, 0, &err); 2849c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 2850c6fd2807SJeff Garzik classes[1] = ata_dev_try_classify(ap, 1, &err); 2851c6fd2807SJeff Garzik 2852c6fd2807SJeff Garzik out: 2853c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 2854c6fd2807SJeff Garzik return 0; 2855c6fd2807SJeff Garzik } 2856c6fd2807SJeff Garzik 2857c6fd2807SJeff Garzik /** 2858b6103f6dSTejun Heo * sata_port_hardreset - reset port via SATA phy reset 2859c6fd2807SJeff Garzik * @ap: port to reset 2860b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 2861c6fd2807SJeff Garzik * 2862c6fd2807SJeff Garzik * SATA phy-reset host port using DET bits of SControl register. 2863c6fd2807SJeff Garzik * 2864c6fd2807SJeff Garzik * LOCKING: 2865c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2866c6fd2807SJeff Garzik * 2867c6fd2807SJeff Garzik * RETURNS: 2868c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2869c6fd2807SJeff Garzik */ 2870b6103f6dSTejun Heo int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing) 2871c6fd2807SJeff Garzik { 2872c6fd2807SJeff Garzik u32 scontrol; 2873c6fd2807SJeff Garzik int rc; 2874c6fd2807SJeff Garzik 2875c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 2876c6fd2807SJeff Garzik 2877c6fd2807SJeff Garzik if (sata_set_spd_needed(ap)) { 2878c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 2879c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 2880c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 2881c6fd2807SJeff Garzik * and Sil3124. 2882c6fd2807SJeff Garzik */ 2883c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2884b6103f6dSTejun Heo goto out; 2885c6fd2807SJeff Garzik 2886cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 2887c6fd2807SJeff Garzik 2888c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2889b6103f6dSTejun Heo goto out; 2890c6fd2807SJeff Garzik 2891c6fd2807SJeff Garzik sata_set_spd(ap); 2892c6fd2807SJeff Garzik } 2893c6fd2807SJeff Garzik 2894c6fd2807SJeff Garzik /* issue phy wake/reset */ 2895c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2896b6103f6dSTejun Heo goto out; 2897c6fd2807SJeff Garzik 2898c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 2899c6fd2807SJeff Garzik 2900c6fd2807SJeff Garzik if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) 2901b6103f6dSTejun Heo goto out; 2902c6fd2807SJeff Garzik 2903c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 2904c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 2905c6fd2807SJeff Garzik */ 2906c6fd2807SJeff Garzik msleep(1); 2907c6fd2807SJeff Garzik 2908c6fd2807SJeff Garzik /* bring phy back */ 2909b6103f6dSTejun Heo rc = sata_phy_resume(ap, timing); 2910b6103f6dSTejun Heo out: 2911b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 2912b6103f6dSTejun Heo return rc; 2913b6103f6dSTejun Heo } 2914b6103f6dSTejun Heo 2915b6103f6dSTejun Heo /** 2916b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 2917b6103f6dSTejun Heo * @ap: port to reset 2918b6103f6dSTejun Heo * @class: resulting class of attached device 2919b6103f6dSTejun Heo * 2920b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 2921b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 2922b6103f6dSTejun Heo * 2923b6103f6dSTejun Heo * LOCKING: 2924b6103f6dSTejun Heo * Kernel thread context (may sleep) 2925b6103f6dSTejun Heo * 2926b6103f6dSTejun Heo * RETURNS: 2927b6103f6dSTejun Heo * 0 on success, -errno otherwise. 2928b6103f6dSTejun Heo */ 2929b6103f6dSTejun Heo int sata_std_hardreset(struct ata_port *ap, unsigned int *class) 2930b6103f6dSTejun Heo { 2931b6103f6dSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); 2932b6103f6dSTejun Heo int rc; 2933b6103f6dSTejun Heo 2934b6103f6dSTejun Heo DPRINTK("ENTER\n"); 2935b6103f6dSTejun Heo 2936b6103f6dSTejun Heo /* do hardreset */ 2937b6103f6dSTejun Heo rc = sata_port_hardreset(ap, timing); 2938b6103f6dSTejun Heo if (rc) { 2939b6103f6dSTejun Heo ata_port_printk(ap, KERN_ERR, 2940b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 2941b6103f6dSTejun Heo return rc; 2942b6103f6dSTejun Heo } 2943c6fd2807SJeff Garzik 2944c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 2945c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 2946c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 2947c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 2948c6fd2807SJeff Garzik return 0; 2949c6fd2807SJeff Garzik } 2950c6fd2807SJeff Garzik 2951c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 2952c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, 2953c6fd2807SJeff Garzik "COMRESET failed (device not ready)\n"); 2954c6fd2807SJeff Garzik return -EIO; 2955c6fd2807SJeff Garzik } 2956c6fd2807SJeff Garzik 2957c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 2958c6fd2807SJeff Garzik 2959c6fd2807SJeff Garzik *class = ata_dev_try_classify(ap, 0, NULL); 2960c6fd2807SJeff Garzik 2961c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 2962c6fd2807SJeff Garzik return 0; 2963c6fd2807SJeff Garzik } 2964c6fd2807SJeff Garzik 2965c6fd2807SJeff Garzik /** 2966c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 2967c6fd2807SJeff Garzik * @ap: the target ata_port 2968c6fd2807SJeff Garzik * @classes: classes of attached devices 2969c6fd2807SJeff Garzik * 2970c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 2971c6fd2807SJeff Garzik * the device might have been reset more than once using 2972c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 2973c6fd2807SJeff Garzik * 2974c6fd2807SJeff Garzik * LOCKING: 2975c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2976c6fd2807SJeff Garzik */ 2977c6fd2807SJeff Garzik void ata_std_postreset(struct ata_port *ap, unsigned int *classes) 2978c6fd2807SJeff Garzik { 2979c6fd2807SJeff Garzik u32 serror; 2980c6fd2807SJeff Garzik 2981c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 2982c6fd2807SJeff Garzik 2983c6fd2807SJeff Garzik /* print link status */ 2984c6fd2807SJeff Garzik sata_print_link_status(ap); 2985c6fd2807SJeff Garzik 2986c6fd2807SJeff Garzik /* clear SError */ 2987c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) 2988c6fd2807SJeff Garzik sata_scr_write(ap, SCR_ERROR, serror); 2989c6fd2807SJeff Garzik 2990c6fd2807SJeff Garzik /* re-enable interrupts */ 2991c6fd2807SJeff Garzik if (!ap->ops->error_handler) { 2992c6fd2807SJeff Garzik /* FIXME: hack. create a hook instead */ 2993c6fd2807SJeff Garzik if (ap->ioaddr.ctl_addr) 2994c6fd2807SJeff Garzik ata_irq_on(ap); 2995c6fd2807SJeff Garzik } 2996c6fd2807SJeff Garzik 2997c6fd2807SJeff Garzik /* is double-select really necessary? */ 2998c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 2999c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3000c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3001c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3002c6fd2807SJeff Garzik 3003c6fd2807SJeff Garzik /* bail out if no device is present */ 3004c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3005c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3006c6fd2807SJeff Garzik return; 3007c6fd2807SJeff Garzik } 3008c6fd2807SJeff Garzik 3009c6fd2807SJeff Garzik /* set up device control */ 3010c6fd2807SJeff Garzik if (ap->ioaddr.ctl_addr) { 3011c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_MMIO) 3012c6fd2807SJeff Garzik writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr); 3013c6fd2807SJeff Garzik else 3014c6fd2807SJeff Garzik outb(ap->ctl, ap->ioaddr.ctl_addr); 3015c6fd2807SJeff Garzik } 3016c6fd2807SJeff Garzik 3017c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3018c6fd2807SJeff Garzik } 3019c6fd2807SJeff Garzik 3020c6fd2807SJeff Garzik /** 3021c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3022c6fd2807SJeff Garzik * @dev: device to compare against 3023c6fd2807SJeff Garzik * @new_class: class of the new device 3024c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3025c6fd2807SJeff Garzik * 3026c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3027c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3028c6fd2807SJeff Garzik * @new_id. 3029c6fd2807SJeff Garzik * 3030c6fd2807SJeff Garzik * LOCKING: 3031c6fd2807SJeff Garzik * None. 3032c6fd2807SJeff Garzik * 3033c6fd2807SJeff Garzik * RETURNS: 3034c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3035c6fd2807SJeff Garzik */ 3036c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3037c6fd2807SJeff Garzik const u16 *new_id) 3038c6fd2807SJeff Garzik { 3039c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3040c6fd2807SJeff Garzik unsigned char model[2][41], serial[2][21]; 3041c6fd2807SJeff Garzik u64 new_n_sectors; 3042c6fd2807SJeff Garzik 3043c6fd2807SJeff Garzik if (dev->class != new_class) { 3044c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3045c6fd2807SJeff Garzik dev->class, new_class); 3046c6fd2807SJeff Garzik return 0; 3047c6fd2807SJeff Garzik } 3048c6fd2807SJeff Garzik 3049c6fd2807SJeff Garzik ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0])); 3050c6fd2807SJeff Garzik ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1])); 3051c6fd2807SJeff Garzik ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0])); 3052c6fd2807SJeff Garzik ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1])); 3053c6fd2807SJeff Garzik new_n_sectors = ata_id_n_sectors(new_id); 3054c6fd2807SJeff Garzik 3055c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3056c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3057c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3058c6fd2807SJeff Garzik return 0; 3059c6fd2807SJeff Garzik } 3060c6fd2807SJeff Garzik 3061c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3062c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3063c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3064c6fd2807SJeff Garzik return 0; 3065c6fd2807SJeff Garzik } 3066c6fd2807SJeff Garzik 3067c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { 3068c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 3069c6fd2807SJeff Garzik "%llu != %llu\n", 3070c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 3071c6fd2807SJeff Garzik (unsigned long long)new_n_sectors); 3072c6fd2807SJeff Garzik return 0; 3073c6fd2807SJeff Garzik } 3074c6fd2807SJeff Garzik 3075c6fd2807SJeff Garzik return 1; 3076c6fd2807SJeff Garzik } 3077c6fd2807SJeff Garzik 3078c6fd2807SJeff Garzik /** 3079c6fd2807SJeff Garzik * ata_dev_revalidate - Revalidate ATA device 3080c6fd2807SJeff Garzik * @dev: device to revalidate 3081bff04647STejun Heo * @readid_flags: read ID flags 3082c6fd2807SJeff Garzik * 3083c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3084c6fd2807SJeff Garzik * the port. 3085c6fd2807SJeff Garzik * 3086c6fd2807SJeff Garzik * LOCKING: 3087c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3088c6fd2807SJeff Garzik * 3089c6fd2807SJeff Garzik * RETURNS: 3090c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3091c6fd2807SJeff Garzik */ 3092bff04647STejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) 3093c6fd2807SJeff Garzik { 3094c6fd2807SJeff Garzik unsigned int class = dev->class; 3095c6fd2807SJeff Garzik u16 *id = (void *)dev->ap->sector_buf; 3096c6fd2807SJeff Garzik int rc; 3097c6fd2807SJeff Garzik 3098c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) { 3099c6fd2807SJeff Garzik rc = -ENODEV; 3100c6fd2807SJeff Garzik goto fail; 3101c6fd2807SJeff Garzik } 3102c6fd2807SJeff Garzik 3103c6fd2807SJeff Garzik /* read ID data */ 3104bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3105c6fd2807SJeff Garzik if (rc) 3106c6fd2807SJeff Garzik goto fail; 3107c6fd2807SJeff Garzik 3108c6fd2807SJeff Garzik /* is the device still there? */ 3109c6fd2807SJeff Garzik if (!ata_dev_same_device(dev, class, id)) { 3110c6fd2807SJeff Garzik rc = -ENODEV; 3111c6fd2807SJeff Garzik goto fail; 3112c6fd2807SJeff Garzik } 3113c6fd2807SJeff Garzik 3114c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3115c6fd2807SJeff Garzik 3116c6fd2807SJeff Garzik /* configure device according to the new ID */ 3117efdaedc4STejun Heo rc = ata_dev_configure(dev); 3118c6fd2807SJeff Garzik if (rc == 0) 3119c6fd2807SJeff Garzik return 0; 3120c6fd2807SJeff Garzik 3121c6fd2807SJeff Garzik fail: 3122c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3123c6fd2807SJeff Garzik return rc; 3124c6fd2807SJeff Garzik } 3125c6fd2807SJeff Garzik 31266919a0a6SAlan Cox struct ata_blacklist_entry { 31276919a0a6SAlan Cox const char *model_num; 31286919a0a6SAlan Cox const char *model_rev; 31296919a0a6SAlan Cox unsigned long horkage; 31306919a0a6SAlan Cox }; 31316919a0a6SAlan Cox 31326919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 31336919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 31346919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 31356919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 31366919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 31376919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 31386919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 31396919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 31406919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 31416919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 31426919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 31436919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 31446919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 31456919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 31466919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 31476919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 31486919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 31496919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 31506919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 31516919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 31526919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 31536919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 31546919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 31556919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 31566919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 31576919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 31586919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 31596919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 31606919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 31616919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 31626919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 31636919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 31646919a0a6SAlan Cox 31656919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 31666919a0a6SAlan Cox 31676919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 31686919a0a6SAlan Cox /* NCQ is slow */ 31696919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 31706919a0a6SAlan Cox 31716919a0a6SAlan Cox /* Devices with NCQ limits */ 31726919a0a6SAlan Cox 31736919a0a6SAlan Cox /* End Marker */ 31746919a0a6SAlan Cox { } 3175c6fd2807SJeff Garzik }; 3176c6fd2807SJeff Garzik 3177c6fd2807SJeff Garzik static int ata_strim(char *s, size_t len) 3178c6fd2807SJeff Garzik { 3179c6fd2807SJeff Garzik len = strnlen(s, len); 3180c6fd2807SJeff Garzik 3181c6fd2807SJeff Garzik /* ATAPI specifies that empty space is blank-filled; remove blanks */ 3182c6fd2807SJeff Garzik while ((len > 0) && (s[len - 1] == ' ')) { 3183c6fd2807SJeff Garzik len--; 3184c6fd2807SJeff Garzik s[len] = 0; 3185c6fd2807SJeff Garzik } 3186c6fd2807SJeff Garzik return len; 3187c6fd2807SJeff Garzik } 3188c6fd2807SJeff Garzik 31896919a0a6SAlan Cox unsigned long ata_device_blacklisted(const struct ata_device *dev) 3190c6fd2807SJeff Garzik { 3191c6fd2807SJeff Garzik unsigned char model_num[40]; 3192c6fd2807SJeff Garzik unsigned char model_rev[16]; 3193c6fd2807SJeff Garzik unsigned int nlen, rlen; 31946919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 3195c6fd2807SJeff Garzik 3196c6fd2807SJeff Garzik ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS, 3197c6fd2807SJeff Garzik sizeof(model_num)); 3198c6fd2807SJeff Garzik ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS, 3199c6fd2807SJeff Garzik sizeof(model_rev)); 3200c6fd2807SJeff Garzik nlen = ata_strim(model_num, sizeof(model_num)); 3201c6fd2807SJeff Garzik rlen = ata_strim(model_rev, sizeof(model_rev)); 3202c6fd2807SJeff Garzik 32036919a0a6SAlan Cox while (ad->model_num) { 32046919a0a6SAlan Cox if (!strncmp(ad->model_num, model_num, nlen)) { 32056919a0a6SAlan Cox if (ad->model_rev == NULL) 32066919a0a6SAlan Cox return ad->horkage; 32076919a0a6SAlan Cox if (!strncmp(ad->model_rev, model_rev, rlen)) 32086919a0a6SAlan Cox return ad->horkage; 3209c6fd2807SJeff Garzik } 32106919a0a6SAlan Cox ad++; 3211c6fd2807SJeff Garzik } 3212c6fd2807SJeff Garzik return 0; 3213c6fd2807SJeff Garzik } 3214c6fd2807SJeff Garzik 32156919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 32166919a0a6SAlan Cox { 32176919a0a6SAlan Cox /* We don't support polling DMA. 32186919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 32196919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 32206919a0a6SAlan Cox */ 32216919a0a6SAlan Cox if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && 32226919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 32236919a0a6SAlan Cox return 1; 32246919a0a6SAlan Cox return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; 32256919a0a6SAlan Cox } 32266919a0a6SAlan Cox 3227c6fd2807SJeff Garzik /** 3228c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 3229c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 3230c6fd2807SJeff Garzik * 3231c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 3232c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 3233c6fd2807SJeff Garzik * known limits including host controller limits, device 3234c6fd2807SJeff Garzik * blacklist, etc... 3235c6fd2807SJeff Garzik * 3236c6fd2807SJeff Garzik * LOCKING: 3237c6fd2807SJeff Garzik * None. 3238c6fd2807SJeff Garzik */ 3239c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 3240c6fd2807SJeff Garzik { 3241c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 3242cca3974eSJeff Garzik struct ata_host *host = ap->host; 3243c6fd2807SJeff Garzik unsigned long xfer_mask; 3244c6fd2807SJeff Garzik 3245c6fd2807SJeff Garzik /* controller modes available */ 3246c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 3247c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 3248c6fd2807SJeff Garzik 3249c6fd2807SJeff Garzik /* Apply cable rule here. Don't apply it early because when 3250c6fd2807SJeff Garzik * we handle hot plug the cable type can itself change. 3251c6fd2807SJeff Garzik */ 3252c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_PATA40) 3253c6fd2807SJeff Garzik xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3254fc085150SAlan Cox /* Apply drive side cable rule. Unknown or 80 pin cables reported 3255fc085150SAlan Cox * host side are checked drive side as well. Cases where we know a 3256fc085150SAlan Cox * 40wire cable is used safely for 80 are not checked here. 3257fc085150SAlan Cox */ 3258fc085150SAlan Cox if (ata_drive_40wire(dev->id) && (ap->cbl == ATA_CBL_PATA_UNK || ap->cbl == ATA_CBL_PATA80)) 3259fc085150SAlan Cox xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3260fc085150SAlan Cox 3261c6fd2807SJeff Garzik 3262c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 3263c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 3264c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 3265c6fd2807SJeff Garzik 3266b352e57dSAlan Cox /* 3267b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 3268b352e57dSAlan Cox * cable 3269b352e57dSAlan Cox */ 3270b352e57dSAlan Cox if (ata_dev_pair(dev)) { 3271b352e57dSAlan Cox /* No PIO5 or PIO6 */ 3272b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 3273b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 3274b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 3275b352e57dSAlan Cox } 3276b352e57dSAlan Cox 3277c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 3278c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3279c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 3280c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 3281c6fd2807SJeff Garzik } 3282c6fd2807SJeff Garzik 3283cca3974eSJeff Garzik if ((host->flags & ATA_HOST_SIMPLEX) && host->simplex_claimed) { 3284c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3285c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 3286c6fd2807SJeff Garzik "other device, disabling DMA\n"); 3287c6fd2807SJeff Garzik } 3288c6fd2807SJeff Garzik 3289c6fd2807SJeff Garzik if (ap->ops->mode_filter) 3290c6fd2807SJeff Garzik xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); 3291c6fd2807SJeff Garzik 3292c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 3293c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 3294c6fd2807SJeff Garzik } 3295c6fd2807SJeff Garzik 3296c6fd2807SJeff Garzik /** 3297c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 3298c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3299c6fd2807SJeff Garzik * 3300c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 3301c6fd2807SJeff Garzik * on port @ap. 3302c6fd2807SJeff Garzik * 3303c6fd2807SJeff Garzik * LOCKING: 3304c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3305c6fd2807SJeff Garzik * 3306c6fd2807SJeff Garzik * RETURNS: 3307c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3308c6fd2807SJeff Garzik */ 3309c6fd2807SJeff Garzik 3310c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 3311c6fd2807SJeff Garzik { 3312c6fd2807SJeff Garzik struct ata_taskfile tf; 3313c6fd2807SJeff Garzik unsigned int err_mask; 3314c6fd2807SJeff Garzik 3315c6fd2807SJeff Garzik /* set up set-features taskfile */ 3316c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 3317c6fd2807SJeff Garzik 3318c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3319c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 3320c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 3321c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3322c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3323c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 3324c6fd2807SJeff Garzik 3325c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3326c6fd2807SJeff Garzik 3327c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3328c6fd2807SJeff Garzik return err_mask; 3329c6fd2807SJeff Garzik } 3330c6fd2807SJeff Garzik 3331c6fd2807SJeff Garzik /** 3332c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 3333c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3334c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 3335c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 3336c6fd2807SJeff Garzik * 3337c6fd2807SJeff Garzik * LOCKING: 3338c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3339c6fd2807SJeff Garzik * 3340c6fd2807SJeff Garzik * RETURNS: 3341c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3342c6fd2807SJeff Garzik */ 3343c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 3344c6fd2807SJeff Garzik u16 heads, u16 sectors) 3345c6fd2807SJeff Garzik { 3346c6fd2807SJeff Garzik struct ata_taskfile tf; 3347c6fd2807SJeff Garzik unsigned int err_mask; 3348c6fd2807SJeff Garzik 3349c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 3350c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 3351c6fd2807SJeff Garzik return AC_ERR_INVALID; 3352c6fd2807SJeff Garzik 3353c6fd2807SJeff Garzik /* set up init dev params taskfile */ 3354c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 3355c6fd2807SJeff Garzik 3356c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3357c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 3358c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3359c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3360c6fd2807SJeff Garzik tf.nsect = sectors; 3361c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 3362c6fd2807SJeff Garzik 3363c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3364c6fd2807SJeff Garzik 3365c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3366c6fd2807SJeff Garzik return err_mask; 3367c6fd2807SJeff Garzik } 3368c6fd2807SJeff Garzik 3369c6fd2807SJeff Garzik /** 3370c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 3371c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 3372c6fd2807SJeff Garzik * 3373c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 3374c6fd2807SJeff Garzik * 3375c6fd2807SJeff Garzik * LOCKING: 3376cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3377c6fd2807SJeff Garzik */ 3378c6fd2807SJeff Garzik 3379c6fd2807SJeff Garzik static void ata_sg_clean(struct ata_queued_cmd *qc) 3380c6fd2807SJeff Garzik { 3381c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3382c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3383c6fd2807SJeff Garzik int dir = qc->dma_dir; 3384c6fd2807SJeff Garzik void *pad_buf = NULL; 3385c6fd2807SJeff Garzik 3386c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 3387c6fd2807SJeff Garzik WARN_ON(sg == NULL); 3388c6fd2807SJeff Garzik 3389c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 3390c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 3391c6fd2807SJeff Garzik 3392c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 3393c6fd2807SJeff Garzik 3394c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 3395c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 3396c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 3397c6fd2807SJeff Garzik */ 3398c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 3399c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3400c6fd2807SJeff Garzik 3401c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 3402c6fd2807SJeff Garzik if (qc->n_elem) 3403c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 3404c6fd2807SJeff Garzik /* restore last sg */ 3405c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 3406c6fd2807SJeff Garzik if (pad_buf) { 3407c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3408c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3409c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 3410c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3411c6fd2807SJeff Garzik } 3412c6fd2807SJeff Garzik } else { 3413c6fd2807SJeff Garzik if (qc->n_elem) 3414c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 3415c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 3416c6fd2807SJeff Garzik dir); 3417c6fd2807SJeff Garzik /* restore sg */ 3418c6fd2807SJeff Garzik sg->length += qc->pad_len; 3419c6fd2807SJeff Garzik if (pad_buf) 3420c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 3421c6fd2807SJeff Garzik pad_buf, qc->pad_len); 3422c6fd2807SJeff Garzik } 3423c6fd2807SJeff Garzik 3424c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 3425c6fd2807SJeff Garzik qc->__sg = NULL; 3426c6fd2807SJeff Garzik } 3427c6fd2807SJeff Garzik 3428c6fd2807SJeff Garzik /** 3429c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 3430c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 3431c6fd2807SJeff Garzik * 3432c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 3433c6fd2807SJeff Garzik * associated with the current disk command. 3434c6fd2807SJeff Garzik * 3435c6fd2807SJeff Garzik * LOCKING: 3436cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3437c6fd2807SJeff Garzik * 3438c6fd2807SJeff Garzik */ 3439c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 3440c6fd2807SJeff Garzik { 3441c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3442c6fd2807SJeff Garzik struct scatterlist *sg; 3443c6fd2807SJeff Garzik unsigned int idx; 3444c6fd2807SJeff Garzik 3445c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 3446c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 3447c6fd2807SJeff Garzik 3448c6fd2807SJeff Garzik idx = 0; 3449c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 3450c6fd2807SJeff Garzik u32 addr, offset; 3451c6fd2807SJeff Garzik u32 sg_len, len; 3452c6fd2807SJeff Garzik 3453c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 3454c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 3455c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 3456c6fd2807SJeff Garzik */ 3457c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 3458c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 3459c6fd2807SJeff Garzik 3460c6fd2807SJeff Garzik while (sg_len) { 3461c6fd2807SJeff Garzik offset = addr & 0xffff; 3462c6fd2807SJeff Garzik len = sg_len; 3463c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 3464c6fd2807SJeff Garzik len = 0x10000 - offset; 3465c6fd2807SJeff Garzik 3466c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 3467c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 3468c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 3469c6fd2807SJeff Garzik 3470c6fd2807SJeff Garzik idx++; 3471c6fd2807SJeff Garzik sg_len -= len; 3472c6fd2807SJeff Garzik addr += len; 3473c6fd2807SJeff Garzik } 3474c6fd2807SJeff Garzik } 3475c6fd2807SJeff Garzik 3476c6fd2807SJeff Garzik if (idx) 3477c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 3478c6fd2807SJeff Garzik } 3479c6fd2807SJeff Garzik /** 3480c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 3481c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 3482c6fd2807SJeff Garzik * 3483c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 3484c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 3485c6fd2807SJeff Garzik * supplied PACKET command. 3486c6fd2807SJeff Garzik * 3487c6fd2807SJeff Garzik * LOCKING: 3488cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3489c6fd2807SJeff Garzik * 3490c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 3491c6fd2807SJeff Garzik * nonzero otherwise 3492c6fd2807SJeff Garzik */ 3493c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 3494c6fd2807SJeff Garzik { 3495c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3496c6fd2807SJeff Garzik int rc = 0; /* Assume ATAPI DMA is OK by default */ 3497c6fd2807SJeff Garzik 3498c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 3499c6fd2807SJeff Garzik rc = ap->ops->check_atapi_dma(qc); 3500c6fd2807SJeff Garzik 3501c6fd2807SJeff Garzik return rc; 3502c6fd2807SJeff Garzik } 3503c6fd2807SJeff Garzik /** 3504c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 3505c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 3506c6fd2807SJeff Garzik * 3507c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 3508c6fd2807SJeff Garzik * 3509c6fd2807SJeff Garzik * LOCKING: 3510cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3511c6fd2807SJeff Garzik */ 3512c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 3513c6fd2807SJeff Garzik { 3514c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 3515c6fd2807SJeff Garzik return; 3516c6fd2807SJeff Garzik 3517c6fd2807SJeff Garzik ata_fill_sg(qc); 3518c6fd2807SJeff Garzik } 3519c6fd2807SJeff Garzik 3520c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 3521c6fd2807SJeff Garzik 3522c6fd2807SJeff Garzik /** 3523c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 3524c6fd2807SJeff Garzik * @qc: Command to be associated 3525c6fd2807SJeff Garzik * @buf: Memory buffer 3526c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 3527c6fd2807SJeff Garzik * 3528c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3529c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 3530c6fd2807SJeff Garzik * 3531c6fd2807SJeff Garzik * LOCKING: 3532cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3533c6fd2807SJeff Garzik */ 3534c6fd2807SJeff Garzik 3535c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 3536c6fd2807SJeff Garzik { 3537c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 3538c6fd2807SJeff Garzik 3539c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 3540c6fd2807SJeff Garzik qc->n_elem = 1; 3541c6fd2807SJeff Garzik qc->orig_n_elem = 1; 3542c6fd2807SJeff Garzik qc->buf_virt = buf; 3543c6fd2807SJeff Garzik qc->nbytes = buflen; 3544c6fd2807SJeff Garzik 354561c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 3546c6fd2807SJeff Garzik } 3547c6fd2807SJeff Garzik 3548c6fd2807SJeff Garzik /** 3549c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 3550c6fd2807SJeff Garzik * @qc: Command to be associated 3551c6fd2807SJeff Garzik * @sg: Scatter-gather table. 3552c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 3553c6fd2807SJeff Garzik * 3554c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3555c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 3556c6fd2807SJeff Garzik * elements. 3557c6fd2807SJeff Garzik * 3558c6fd2807SJeff Garzik * LOCKING: 3559cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3560c6fd2807SJeff Garzik */ 3561c6fd2807SJeff Garzik 3562c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 3563c6fd2807SJeff Garzik unsigned int n_elem) 3564c6fd2807SJeff Garzik { 3565c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 3566c6fd2807SJeff Garzik qc->__sg = sg; 3567c6fd2807SJeff Garzik qc->n_elem = n_elem; 3568c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 3569c6fd2807SJeff Garzik } 3570c6fd2807SJeff Garzik 3571c6fd2807SJeff Garzik /** 3572c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 3573c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 3574c6fd2807SJeff Garzik * 3575c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 3576c6fd2807SJeff Garzik * 3577c6fd2807SJeff Garzik * LOCKING: 3578cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3579c6fd2807SJeff Garzik * 3580c6fd2807SJeff Garzik * RETURNS: 3581c6fd2807SJeff Garzik * Zero on success, negative on error. 3582c6fd2807SJeff Garzik */ 3583c6fd2807SJeff Garzik 3584c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 3585c6fd2807SJeff Garzik { 3586c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3587c6fd2807SJeff Garzik int dir = qc->dma_dir; 3588c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3589c6fd2807SJeff Garzik dma_addr_t dma_address; 3590c6fd2807SJeff Garzik int trim_sg = 0; 3591c6fd2807SJeff Garzik 3592c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3593c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 3594c6fd2807SJeff Garzik if (qc->pad_len) { 3595c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3596c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3597c6fd2807SJeff Garzik 3598c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3599c6fd2807SJeff Garzik 3600c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3601c6fd2807SJeff Garzik 3602c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 3603c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 3604c6fd2807SJeff Garzik qc->pad_len); 3605c6fd2807SJeff Garzik 3606c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3607c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3608c6fd2807SJeff Garzik /* trim sg */ 3609c6fd2807SJeff Garzik sg->length -= qc->pad_len; 3610c6fd2807SJeff Garzik if (sg->length == 0) 3611c6fd2807SJeff Garzik trim_sg = 1; 3612c6fd2807SJeff Garzik 3613c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 3614c6fd2807SJeff Garzik sg->length, qc->pad_len); 3615c6fd2807SJeff Garzik } 3616c6fd2807SJeff Garzik 3617c6fd2807SJeff Garzik if (trim_sg) { 3618c6fd2807SJeff Garzik qc->n_elem--; 3619c6fd2807SJeff Garzik goto skip_map; 3620c6fd2807SJeff Garzik } 3621c6fd2807SJeff Garzik 3622c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 3623c6fd2807SJeff Garzik sg->length, dir); 3624c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 3625c6fd2807SJeff Garzik /* restore sg */ 3626c6fd2807SJeff Garzik sg->length += qc->pad_len; 3627c6fd2807SJeff Garzik return -1; 3628c6fd2807SJeff Garzik } 3629c6fd2807SJeff Garzik 3630c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 3631c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 3632c6fd2807SJeff Garzik 3633c6fd2807SJeff Garzik skip_map: 3634c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 3635c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 3636c6fd2807SJeff Garzik 3637c6fd2807SJeff Garzik return 0; 3638c6fd2807SJeff Garzik } 3639c6fd2807SJeff Garzik 3640c6fd2807SJeff Garzik /** 3641c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 3642c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 3643c6fd2807SJeff Garzik * 3644c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 3645c6fd2807SJeff Garzik * 3646c6fd2807SJeff Garzik * LOCKING: 3647cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3648c6fd2807SJeff Garzik * 3649c6fd2807SJeff Garzik * RETURNS: 3650c6fd2807SJeff Garzik * Zero on success, negative on error. 3651c6fd2807SJeff Garzik * 3652c6fd2807SJeff Garzik */ 3653c6fd2807SJeff Garzik 3654c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 3655c6fd2807SJeff Garzik { 3656c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3657c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3658c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 3659c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 3660c6fd2807SJeff Garzik 3661c6fd2807SJeff Garzik VPRINTK("ENTER, ata%u\n", ap->id); 3662c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 3663c6fd2807SJeff Garzik 3664c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3665c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 3666c6fd2807SJeff Garzik if (qc->pad_len) { 3667c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3668c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3669c6fd2807SJeff Garzik unsigned int offset; 3670c6fd2807SJeff Garzik 3671c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3672c6fd2807SJeff Garzik 3673c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3674c6fd2807SJeff Garzik 3675c6fd2807SJeff Garzik /* 3676c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 3677c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 3678c6fd2807SJeff Garzik */ 3679c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 3680c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 3681c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 3682c6fd2807SJeff Garzik 3683c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 3684c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3685c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 3686c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3687c6fd2807SJeff Garzik } 3688c6fd2807SJeff Garzik 3689c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3690c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3691c6fd2807SJeff Garzik /* trim last sg */ 3692c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 3693c6fd2807SJeff Garzik if (lsg->length == 0) 3694c6fd2807SJeff Garzik trim_sg = 1; 3695c6fd2807SJeff Garzik 3696c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 3697c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 3698c6fd2807SJeff Garzik } 3699c6fd2807SJeff Garzik 3700c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 3701c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 3702c6fd2807SJeff Garzik pre_n_elem--; 3703c6fd2807SJeff Garzik 3704c6fd2807SJeff Garzik if (!pre_n_elem) { 3705c6fd2807SJeff Garzik n_elem = 0; 3706c6fd2807SJeff Garzik goto skip_map; 3707c6fd2807SJeff Garzik } 3708c6fd2807SJeff Garzik 3709c6fd2807SJeff Garzik dir = qc->dma_dir; 3710c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 3711c6fd2807SJeff Garzik if (n_elem < 1) { 3712c6fd2807SJeff Garzik /* restore last sg */ 3713c6fd2807SJeff Garzik lsg->length += qc->pad_len; 3714c6fd2807SJeff Garzik return -1; 3715c6fd2807SJeff Garzik } 3716c6fd2807SJeff Garzik 3717c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 3718c6fd2807SJeff Garzik 3719c6fd2807SJeff Garzik skip_map: 3720c6fd2807SJeff Garzik qc->n_elem = n_elem; 3721c6fd2807SJeff Garzik 3722c6fd2807SJeff Garzik return 0; 3723c6fd2807SJeff Garzik } 3724c6fd2807SJeff Garzik 3725c6fd2807SJeff Garzik /** 3726c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 3727c6fd2807SJeff Garzik * @buf: Buffer to swap 3728c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 3729c6fd2807SJeff Garzik * 3730c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 3731c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 3732c6fd2807SJeff Garzik * vice-versa. 3733c6fd2807SJeff Garzik * 3734c6fd2807SJeff Garzik * LOCKING: 3735c6fd2807SJeff Garzik * Inherited from caller. 3736c6fd2807SJeff Garzik */ 3737c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 3738c6fd2807SJeff Garzik { 3739c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 3740c6fd2807SJeff Garzik unsigned int i; 3741c6fd2807SJeff Garzik 3742c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 3743c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 3744c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 3745c6fd2807SJeff Garzik } 3746c6fd2807SJeff Garzik 3747c6fd2807SJeff Garzik /** 3748c6fd2807SJeff Garzik * ata_mmio_data_xfer - Transfer data by MMIO 3749c6fd2807SJeff Garzik * @adev: device for this I/O 3750c6fd2807SJeff Garzik * @buf: data buffer 3751c6fd2807SJeff Garzik * @buflen: buffer length 3752c6fd2807SJeff Garzik * @write_data: read/write 3753c6fd2807SJeff Garzik * 3754c6fd2807SJeff Garzik * Transfer data from/to the device data register by MMIO. 3755c6fd2807SJeff Garzik * 3756c6fd2807SJeff Garzik * LOCKING: 3757c6fd2807SJeff Garzik * Inherited from caller. 3758c6fd2807SJeff Garzik */ 3759c6fd2807SJeff Garzik 3760c6fd2807SJeff Garzik void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf, 3761c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3762c6fd2807SJeff Garzik { 3763c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 3764c6fd2807SJeff Garzik unsigned int i; 3765c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 3766c6fd2807SJeff Garzik u16 *buf16 = (u16 *) buf; 3767c6fd2807SJeff Garzik void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; 3768c6fd2807SJeff Garzik 3769c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 3770c6fd2807SJeff Garzik if (write_data) { 3771c6fd2807SJeff Garzik for (i = 0; i < words; i++) 3772c6fd2807SJeff Garzik writew(le16_to_cpu(buf16[i]), mmio); 3773c6fd2807SJeff Garzik } else { 3774c6fd2807SJeff Garzik for (i = 0; i < words; i++) 3775c6fd2807SJeff Garzik buf16[i] = cpu_to_le16(readw(mmio)); 3776c6fd2807SJeff Garzik } 3777c6fd2807SJeff Garzik 3778c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 3779c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 3780c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 3781c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 3782c6fd2807SJeff Garzik 3783c6fd2807SJeff Garzik if (write_data) { 3784c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 3785c6fd2807SJeff Garzik writew(le16_to_cpu(align_buf[0]), mmio); 3786c6fd2807SJeff Garzik } else { 3787c6fd2807SJeff Garzik align_buf[0] = cpu_to_le16(readw(mmio)); 3788c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 3789c6fd2807SJeff Garzik } 3790c6fd2807SJeff Garzik } 3791c6fd2807SJeff Garzik } 3792c6fd2807SJeff Garzik 3793c6fd2807SJeff Garzik /** 3794c6fd2807SJeff Garzik * ata_pio_data_xfer - Transfer data by PIO 3795c6fd2807SJeff Garzik * @adev: device to target 3796c6fd2807SJeff Garzik * @buf: data buffer 3797c6fd2807SJeff Garzik * @buflen: buffer length 3798c6fd2807SJeff Garzik * @write_data: read/write 3799c6fd2807SJeff Garzik * 3800c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 3801c6fd2807SJeff Garzik * 3802c6fd2807SJeff Garzik * LOCKING: 3803c6fd2807SJeff Garzik * Inherited from caller. 3804c6fd2807SJeff Garzik */ 3805c6fd2807SJeff Garzik 3806c6fd2807SJeff Garzik void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf, 3807c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3808c6fd2807SJeff Garzik { 3809c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 3810c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 3811c6fd2807SJeff Garzik 3812c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 3813c6fd2807SJeff Garzik if (write_data) 3814c6fd2807SJeff Garzik outsw(ap->ioaddr.data_addr, buf, words); 3815c6fd2807SJeff Garzik else 3816c6fd2807SJeff Garzik insw(ap->ioaddr.data_addr, buf, words); 3817c6fd2807SJeff Garzik 3818c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 3819c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 3820c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 3821c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 3822c6fd2807SJeff Garzik 3823c6fd2807SJeff Garzik if (write_data) { 3824c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 3825c6fd2807SJeff Garzik outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 3826c6fd2807SJeff Garzik } else { 3827c6fd2807SJeff Garzik align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); 3828c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 3829c6fd2807SJeff Garzik } 3830c6fd2807SJeff Garzik } 3831c6fd2807SJeff Garzik } 3832c6fd2807SJeff Garzik 3833c6fd2807SJeff Garzik /** 3834c6fd2807SJeff Garzik * ata_pio_data_xfer_noirq - Transfer data by PIO 3835c6fd2807SJeff Garzik * @adev: device to target 3836c6fd2807SJeff Garzik * @buf: data buffer 3837c6fd2807SJeff Garzik * @buflen: buffer length 3838c6fd2807SJeff Garzik * @write_data: read/write 3839c6fd2807SJeff Garzik * 3840c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 3841c6fd2807SJeff Garzik * transfer with interrupts disabled. 3842c6fd2807SJeff Garzik * 3843c6fd2807SJeff Garzik * LOCKING: 3844c6fd2807SJeff Garzik * Inherited from caller. 3845c6fd2807SJeff Garzik */ 3846c6fd2807SJeff Garzik 3847c6fd2807SJeff Garzik void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 3848c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3849c6fd2807SJeff Garzik { 3850c6fd2807SJeff Garzik unsigned long flags; 3851c6fd2807SJeff Garzik local_irq_save(flags); 3852c6fd2807SJeff Garzik ata_pio_data_xfer(adev, buf, buflen, write_data); 3853c6fd2807SJeff Garzik local_irq_restore(flags); 3854c6fd2807SJeff Garzik } 3855c6fd2807SJeff Garzik 3856c6fd2807SJeff Garzik 3857c6fd2807SJeff Garzik /** 3858c6fd2807SJeff Garzik * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. 3859c6fd2807SJeff Garzik * @qc: Command on going 3860c6fd2807SJeff Garzik * 3861c6fd2807SJeff Garzik * Transfer ATA_SECT_SIZE of data from/to the ATA device. 3862c6fd2807SJeff Garzik * 3863c6fd2807SJeff Garzik * LOCKING: 3864c6fd2807SJeff Garzik * Inherited from caller. 3865c6fd2807SJeff Garzik */ 3866c6fd2807SJeff Garzik 3867c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 3868c6fd2807SJeff Garzik { 3869c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 3870c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3871c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3872c6fd2807SJeff Garzik struct page *page; 3873c6fd2807SJeff Garzik unsigned int offset; 3874c6fd2807SJeff Garzik unsigned char *buf; 3875c6fd2807SJeff Garzik 3876c6fd2807SJeff Garzik if (qc->cursect == (qc->nsect - 1)) 3877c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3878c6fd2807SJeff Garzik 3879c6fd2807SJeff Garzik page = sg[qc->cursg].page; 3880c6fd2807SJeff Garzik offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; 3881c6fd2807SJeff Garzik 3882c6fd2807SJeff Garzik /* get the current page and offset */ 3883c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 3884c6fd2807SJeff Garzik offset %= PAGE_SIZE; 3885c6fd2807SJeff Garzik 3886c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 3887c6fd2807SJeff Garzik 3888c6fd2807SJeff Garzik if (PageHighMem(page)) { 3889c6fd2807SJeff Garzik unsigned long flags; 3890c6fd2807SJeff Garzik 3891c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 3892c6fd2807SJeff Garzik local_irq_save(flags); 3893c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 3894c6fd2807SJeff Garzik 3895c6fd2807SJeff Garzik /* do the actual data transfer */ 3896c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 3897c6fd2807SJeff Garzik 3898c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 3899c6fd2807SJeff Garzik local_irq_restore(flags); 3900c6fd2807SJeff Garzik } else { 3901c6fd2807SJeff Garzik buf = page_address(page); 3902c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 3903c6fd2807SJeff Garzik } 3904c6fd2807SJeff Garzik 3905c6fd2807SJeff Garzik qc->cursect++; 3906c6fd2807SJeff Garzik qc->cursg_ofs++; 3907c6fd2807SJeff Garzik 3908c6fd2807SJeff Garzik if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { 3909c6fd2807SJeff Garzik qc->cursg++; 3910c6fd2807SJeff Garzik qc->cursg_ofs = 0; 3911c6fd2807SJeff Garzik } 3912c6fd2807SJeff Garzik } 3913c6fd2807SJeff Garzik 3914c6fd2807SJeff Garzik /** 3915c6fd2807SJeff Garzik * ata_pio_sectors - Transfer one or many 512-byte sectors. 3916c6fd2807SJeff Garzik * @qc: Command on going 3917c6fd2807SJeff Garzik * 3918c6fd2807SJeff Garzik * Transfer one or many ATA_SECT_SIZE of data from/to the 3919c6fd2807SJeff Garzik * ATA device for the DRQ request. 3920c6fd2807SJeff Garzik * 3921c6fd2807SJeff Garzik * LOCKING: 3922c6fd2807SJeff Garzik * Inherited from caller. 3923c6fd2807SJeff Garzik */ 3924c6fd2807SJeff Garzik 3925c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 3926c6fd2807SJeff Garzik { 3927c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 3928c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 3929c6fd2807SJeff Garzik unsigned int nsect; 3930c6fd2807SJeff Garzik 3931c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 3932c6fd2807SJeff Garzik 3933c6fd2807SJeff Garzik nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count); 3934c6fd2807SJeff Garzik while (nsect--) 3935c6fd2807SJeff Garzik ata_pio_sector(qc); 3936c6fd2807SJeff Garzik } else 3937c6fd2807SJeff Garzik ata_pio_sector(qc); 3938c6fd2807SJeff Garzik } 3939c6fd2807SJeff Garzik 3940c6fd2807SJeff Garzik /** 3941c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 3942c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 3943c6fd2807SJeff Garzik * @qc: Taskfile currently active 3944c6fd2807SJeff Garzik * 3945c6fd2807SJeff Garzik * When device has indicated its readiness to accept 3946c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 3947c6fd2807SJeff Garzik * 3948c6fd2807SJeff Garzik * LOCKING: 3949c6fd2807SJeff Garzik * caller. 3950c6fd2807SJeff Garzik */ 3951c6fd2807SJeff Garzik 3952c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 3953c6fd2807SJeff Garzik { 3954c6fd2807SJeff Garzik /* send SCSI cdb */ 3955c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 3956c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 3957c6fd2807SJeff Garzik 3958c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 3959c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 3960c6fd2807SJeff Garzik 3961c6fd2807SJeff Garzik switch (qc->tf.protocol) { 3962c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 3963c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 3964c6fd2807SJeff Garzik break; 3965c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 3966c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3967c6fd2807SJeff Garzik break; 3968c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 3969c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3970c6fd2807SJeff Garzik /* initiate bmdma */ 3971c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 3972c6fd2807SJeff Garzik break; 3973c6fd2807SJeff Garzik } 3974c6fd2807SJeff Garzik } 3975c6fd2807SJeff Garzik 3976c6fd2807SJeff Garzik /** 3977c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 3978c6fd2807SJeff Garzik * @qc: Command on going 3979c6fd2807SJeff Garzik * @bytes: number of bytes 3980c6fd2807SJeff Garzik * 3981c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 3982c6fd2807SJeff Garzik * 3983c6fd2807SJeff Garzik * LOCKING: 3984c6fd2807SJeff Garzik * Inherited from caller. 3985c6fd2807SJeff Garzik * 3986c6fd2807SJeff Garzik */ 3987c6fd2807SJeff Garzik 3988c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 3989c6fd2807SJeff Garzik { 3990c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 3991c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3992c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3993c6fd2807SJeff Garzik struct page *page; 3994c6fd2807SJeff Garzik unsigned char *buf; 3995c6fd2807SJeff Garzik unsigned int offset, count; 3996c6fd2807SJeff Garzik 3997c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 3998c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3999c6fd2807SJeff Garzik 4000c6fd2807SJeff Garzik next_sg: 4001c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4002c6fd2807SJeff Garzik /* 4003c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4004c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4005c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4006c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4007c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4008c6fd2807SJeff Garzik */ 4009c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4010c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4011c6fd2807SJeff Garzik unsigned int i; 4012c6fd2807SJeff Garzik 4013c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4014c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4015c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4016c6fd2807SJeff Garzik 4017c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4018c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4019c6fd2807SJeff Garzik 4020c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4021c6fd2807SJeff Garzik return; 4022c6fd2807SJeff Garzik } 4023c6fd2807SJeff Garzik 4024c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4025c6fd2807SJeff Garzik 4026c6fd2807SJeff Garzik page = sg->page; 4027c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4028c6fd2807SJeff Garzik 4029c6fd2807SJeff Garzik /* get the current page and offset */ 4030c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4031c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4032c6fd2807SJeff Garzik 4033c6fd2807SJeff Garzik /* don't overrun current sg */ 4034c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4035c6fd2807SJeff Garzik 4036c6fd2807SJeff Garzik /* don't cross page boundaries */ 4037c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4038c6fd2807SJeff Garzik 4039c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4040c6fd2807SJeff Garzik 4041c6fd2807SJeff Garzik if (PageHighMem(page)) { 4042c6fd2807SJeff Garzik unsigned long flags; 4043c6fd2807SJeff Garzik 4044c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4045c6fd2807SJeff Garzik local_irq_save(flags); 4046c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4047c6fd2807SJeff Garzik 4048c6fd2807SJeff Garzik /* do the actual data transfer */ 4049c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4050c6fd2807SJeff Garzik 4051c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4052c6fd2807SJeff Garzik local_irq_restore(flags); 4053c6fd2807SJeff Garzik } else { 4054c6fd2807SJeff Garzik buf = page_address(page); 4055c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4056c6fd2807SJeff Garzik } 4057c6fd2807SJeff Garzik 4058c6fd2807SJeff Garzik bytes -= count; 4059c6fd2807SJeff Garzik qc->curbytes += count; 4060c6fd2807SJeff Garzik qc->cursg_ofs += count; 4061c6fd2807SJeff Garzik 4062c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 4063c6fd2807SJeff Garzik qc->cursg++; 4064c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4065c6fd2807SJeff Garzik } 4066c6fd2807SJeff Garzik 4067c6fd2807SJeff Garzik if (bytes) 4068c6fd2807SJeff Garzik goto next_sg; 4069c6fd2807SJeff Garzik } 4070c6fd2807SJeff Garzik 4071c6fd2807SJeff Garzik /** 4072c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 4073c6fd2807SJeff Garzik * @qc: Command on going 4074c6fd2807SJeff Garzik * 4075c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4076c6fd2807SJeff Garzik * 4077c6fd2807SJeff Garzik * LOCKING: 4078c6fd2807SJeff Garzik * Inherited from caller. 4079c6fd2807SJeff Garzik */ 4080c6fd2807SJeff Garzik 4081c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 4082c6fd2807SJeff Garzik { 4083c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4084c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 4085c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 4086c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 4087c6fd2807SJeff Garzik 4088c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 4089c6fd2807SJeff Garzik * here to save some kernel stack usage. 4090c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 4091c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 4092c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 4093c6fd2807SJeff Garzik */ 4094c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 4095c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 4096c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 4097c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 4098c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 4099c6fd2807SJeff Garzik 4100c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 4101c6fd2807SJeff Garzik if (ireason & (1 << 0)) 4102c6fd2807SJeff Garzik goto err_out; 4103c6fd2807SJeff Garzik 4104c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 4105c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 4106c6fd2807SJeff Garzik if (do_write != i_write) 4107c6fd2807SJeff Garzik goto err_out; 4108c6fd2807SJeff Garzik 4109c6fd2807SJeff Garzik VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes); 4110c6fd2807SJeff Garzik 4111c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 4112c6fd2807SJeff Garzik 4113c6fd2807SJeff Garzik return; 4114c6fd2807SJeff Garzik 4115c6fd2807SJeff Garzik err_out: 4116c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 4117c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4118c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4119c6fd2807SJeff Garzik } 4120c6fd2807SJeff Garzik 4121c6fd2807SJeff Garzik /** 4122c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 4123c6fd2807SJeff Garzik * @ap: the target ata_port 4124c6fd2807SJeff Garzik * @qc: qc on going 4125c6fd2807SJeff Garzik * 4126c6fd2807SJeff Garzik * RETURNS: 4127c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 4128c6fd2807SJeff Garzik */ 4129c6fd2807SJeff Garzik 4130c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 4131c6fd2807SJeff Garzik { 4132c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4133c6fd2807SJeff Garzik return 1; 4134c6fd2807SJeff Garzik 4135c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 4136c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 4137c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 4138c6fd2807SJeff Garzik return 1; 4139c6fd2807SJeff Garzik 4140c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 4141c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4142c6fd2807SJeff Garzik return 1; 4143c6fd2807SJeff Garzik } 4144c6fd2807SJeff Garzik 4145c6fd2807SJeff Garzik return 0; 4146c6fd2807SJeff Garzik } 4147c6fd2807SJeff Garzik 4148c6fd2807SJeff Garzik /** 4149c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 4150c6fd2807SJeff Garzik * @qc: Command to complete 4151c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4152c6fd2807SJeff Garzik * 4153c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 4154c6fd2807SJeff Garzik * 4155c6fd2807SJeff Garzik * LOCKING: 4156cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 4157c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 4158c6fd2807SJeff Garzik */ 4159c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 4160c6fd2807SJeff Garzik { 4161c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4162c6fd2807SJeff Garzik unsigned long flags; 4163c6fd2807SJeff Garzik 4164c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4165c6fd2807SJeff Garzik if (in_wq) { 4166c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4167c6fd2807SJeff Garzik 4168cca3974eSJeff Garzik /* EH might have kicked in while host lock is 4169cca3974eSJeff Garzik * released. 4170c6fd2807SJeff Garzik */ 4171c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 4172c6fd2807SJeff Garzik if (qc) { 4173c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 4174c6fd2807SJeff Garzik ata_irq_on(ap); 4175c6fd2807SJeff Garzik ata_qc_complete(qc); 4176c6fd2807SJeff Garzik } else 4177c6fd2807SJeff Garzik ata_port_freeze(ap); 4178c6fd2807SJeff Garzik } 4179c6fd2807SJeff Garzik 4180c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4181c6fd2807SJeff Garzik } else { 4182c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 4183c6fd2807SJeff Garzik ata_qc_complete(qc); 4184c6fd2807SJeff Garzik else 4185c6fd2807SJeff Garzik ata_port_freeze(ap); 4186c6fd2807SJeff Garzik } 4187c6fd2807SJeff Garzik } else { 4188c6fd2807SJeff Garzik if (in_wq) { 4189c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4190c6fd2807SJeff Garzik ata_irq_on(ap); 4191c6fd2807SJeff Garzik ata_qc_complete(qc); 4192c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4193c6fd2807SJeff Garzik } else 4194c6fd2807SJeff Garzik ata_qc_complete(qc); 4195c6fd2807SJeff Garzik } 4196c6fd2807SJeff Garzik 4197c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4198c6fd2807SJeff Garzik } 4199c6fd2807SJeff Garzik 4200c6fd2807SJeff Garzik /** 4201c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 4202c6fd2807SJeff Garzik * @ap: the target ata_port 4203c6fd2807SJeff Garzik * @qc: qc on going 4204c6fd2807SJeff Garzik * @status: current device status 4205c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4206c6fd2807SJeff Garzik * 4207c6fd2807SJeff Garzik * RETURNS: 4208c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 4209c6fd2807SJeff Garzik */ 4210c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 4211c6fd2807SJeff Garzik u8 status, int in_wq) 4212c6fd2807SJeff Garzik { 4213c6fd2807SJeff Garzik unsigned long flags = 0; 4214c6fd2807SJeff Garzik int poll_next; 4215c6fd2807SJeff Garzik 4216c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 4217c6fd2807SJeff Garzik 4218c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 4219c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 4220c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 4221c6fd2807SJeff Garzik */ 4222c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 4223c6fd2807SJeff Garzik 4224c6fd2807SJeff Garzik fsm_start: 4225c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 4226c6fd2807SJeff Garzik ap->id, qc->tf.protocol, ap->hsm_task_state, status); 4227c6fd2807SJeff Garzik 4228c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4229c6fd2807SJeff Garzik case HSM_ST_FIRST: 4230c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 4231c6fd2807SJeff Garzik 4232c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 4233c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 4234c6fd2807SJeff Garzik * takes over after sending the data. 4235c6fd2807SJeff Garzik */ 4236c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 4237c6fd2807SJeff Garzik 4238c6fd2807SJeff Garzik /* check device status */ 4239c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4240c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4241c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4242c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4243c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4244c6fd2807SJeff Garzik else 4245c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 4246c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4247c6fd2807SJeff Garzik 4248c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4249c6fd2807SJeff Garzik goto fsm_start; 4250c6fd2807SJeff Garzik } 4251c6fd2807SJeff Garzik 4252c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4253c6fd2807SJeff Garzik * when it finds something wrong. 4254c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4255c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4256c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4257c6fd2807SJeff Garzik */ 4258c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4259c6fd2807SJeff Garzik printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", 4260c6fd2807SJeff Garzik ap->id, status); 4261c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4262c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4263c6fd2807SJeff Garzik goto fsm_start; 4264c6fd2807SJeff Garzik } 4265c6fd2807SJeff Garzik 4266c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 4267c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 4268c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 4269c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 4270c6fd2807SJeff Garzik */ 4271c6fd2807SJeff Garzik if (in_wq) 4272c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4273c6fd2807SJeff Garzik 4274c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 4275c6fd2807SJeff Garzik /* PIO data out protocol. 4276c6fd2807SJeff Garzik * send first data block. 4277c6fd2807SJeff Garzik */ 4278c6fd2807SJeff Garzik 4279c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 4280c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 4281c6fd2807SJeff Garzik * before ata_pio_sectors(). 4282c6fd2807SJeff Garzik */ 4283c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4284c6fd2807SJeff Garzik ata_pio_sectors(qc); 4285c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4286c6fd2807SJeff Garzik } else 4287c6fd2807SJeff Garzik /* send CDB */ 4288c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 4289c6fd2807SJeff Garzik 4290c6fd2807SJeff Garzik if (in_wq) 4291c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4292c6fd2807SJeff Garzik 4293c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4294c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4295c6fd2807SJeff Garzik */ 4296c6fd2807SJeff Garzik break; 4297c6fd2807SJeff Garzik 4298c6fd2807SJeff Garzik case HSM_ST: 4299c6fd2807SJeff Garzik /* complete command or read/write the data register */ 4300c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 4301c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 4302c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 4303c6fd2807SJeff Garzik /* No more data to transfer or device error. 4304c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 4305c6fd2807SJeff Garzik */ 4306c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4307c6fd2807SJeff Garzik goto fsm_start; 4308c6fd2807SJeff Garzik } 4309c6fd2807SJeff Garzik 4310c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4311c6fd2807SJeff Garzik * when it finds something wrong. 4312c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4313c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4314c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4315c6fd2807SJeff Garzik */ 4316c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4317c6fd2807SJeff Garzik printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", 4318c6fd2807SJeff Garzik ap->id, status); 4319c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4320c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4321c6fd2807SJeff Garzik goto fsm_start; 4322c6fd2807SJeff Garzik } 4323c6fd2807SJeff Garzik 4324c6fd2807SJeff Garzik atapi_pio_bytes(qc); 4325c6fd2807SJeff Garzik 4326c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 4327c6fd2807SJeff Garzik /* bad ireason reported by device */ 4328c6fd2807SJeff Garzik goto fsm_start; 4329c6fd2807SJeff Garzik 4330c6fd2807SJeff Garzik } else { 4331c6fd2807SJeff Garzik /* ATA PIO protocol */ 4332c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4333c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4334c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4335c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4336c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4337c6fd2807SJeff Garzik else 433855a8e2c8STejun Heo /* HSM violation. Let EH handle this. 433955a8e2c8STejun Heo * Phantom devices also trigger this 434055a8e2c8STejun Heo * condition. Mark hint. 434155a8e2c8STejun Heo */ 434255a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 434355a8e2c8STejun Heo AC_ERR_NODEV_HINT; 4344c6fd2807SJeff Garzik 4345c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4346c6fd2807SJeff Garzik goto fsm_start; 4347c6fd2807SJeff Garzik } 4348c6fd2807SJeff Garzik 4349c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 4350c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 4351c6fd2807SJeff Garzik * We respect DRQ here and transfer one 4352c6fd2807SJeff Garzik * block of junk data before changing the 4353c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 4354c6fd2807SJeff Garzik * 4355c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 4356c6fd2807SJeff Garzik * sense since the data block has been 4357c6fd2807SJeff Garzik * transferred to the device. 4358c6fd2807SJeff Garzik */ 4359c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4360c6fd2807SJeff Garzik /* data might be corrputed */ 4361c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4362c6fd2807SJeff Garzik 4363c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 4364c6fd2807SJeff Garzik ata_pio_sectors(qc); 4365c6fd2807SJeff Garzik ata_altstatus(ap); 4366c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4367c6fd2807SJeff Garzik } 4368c6fd2807SJeff Garzik 4369c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 4370c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4371c6fd2807SJeff Garzik 4372c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 4373c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 4374c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 4375c6fd2807SJeff Garzik */ 4376c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4377c6fd2807SJeff Garzik goto fsm_start; 4378c6fd2807SJeff Garzik } 4379c6fd2807SJeff Garzik 4380c6fd2807SJeff Garzik ata_pio_sectors(qc); 4381c6fd2807SJeff Garzik 4382c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 4383c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 4384c6fd2807SJeff Garzik /* all data read */ 4385c6fd2807SJeff Garzik ata_altstatus(ap); 4386c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4387c6fd2807SJeff Garzik goto fsm_start; 4388c6fd2807SJeff Garzik } 4389c6fd2807SJeff Garzik } 4390c6fd2807SJeff Garzik 4391c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4392c6fd2807SJeff Garzik poll_next = 1; 4393c6fd2807SJeff Garzik break; 4394c6fd2807SJeff Garzik 4395c6fd2807SJeff Garzik case HSM_ST_LAST: 4396c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 4397c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 4398c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4399c6fd2807SJeff Garzik goto fsm_start; 4400c6fd2807SJeff Garzik } 4401c6fd2807SJeff Garzik 4402c6fd2807SJeff Garzik /* no more data to transfer */ 4403c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 4404c6fd2807SJeff Garzik ap->id, qc->dev->devno, status); 4405c6fd2807SJeff Garzik 4406c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 4407c6fd2807SJeff Garzik 4408c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4409c6fd2807SJeff Garzik 4410c6fd2807SJeff Garzik /* complete taskfile transaction */ 4411c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4412c6fd2807SJeff Garzik 4413c6fd2807SJeff Garzik poll_next = 0; 4414c6fd2807SJeff Garzik break; 4415c6fd2807SJeff Garzik 4416c6fd2807SJeff Garzik case HSM_ST_ERR: 4417c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 4418c6fd2807SJeff Garzik * know what's wrong and recover 4419c6fd2807SJeff Garzik */ 4420c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 4421c6fd2807SJeff Garzik 4422c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4423c6fd2807SJeff Garzik 4424c6fd2807SJeff Garzik /* complete taskfile transaction */ 4425c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4426c6fd2807SJeff Garzik 4427c6fd2807SJeff Garzik poll_next = 0; 4428c6fd2807SJeff Garzik break; 4429c6fd2807SJeff Garzik default: 4430c6fd2807SJeff Garzik poll_next = 0; 4431c6fd2807SJeff Garzik BUG(); 4432c6fd2807SJeff Garzik } 4433c6fd2807SJeff Garzik 4434c6fd2807SJeff Garzik return poll_next; 4435c6fd2807SJeff Garzik } 4436c6fd2807SJeff Garzik 4437c6fd2807SJeff Garzik static void ata_pio_task(void *_data) 4438c6fd2807SJeff Garzik { 4439c6fd2807SJeff Garzik struct ata_queued_cmd *qc = _data; 4440c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4441c6fd2807SJeff Garzik u8 status; 4442c6fd2807SJeff Garzik int poll_next; 4443c6fd2807SJeff Garzik 4444c6fd2807SJeff Garzik fsm_start: 4445c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 4446c6fd2807SJeff Garzik 4447c6fd2807SJeff Garzik /* 4448c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 4449c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 4450c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 4451c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 4452c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 4453c6fd2807SJeff Garzik */ 4454c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 4455c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4456c6fd2807SJeff Garzik msleep(2); 4457c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 4458c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4459c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 4460c6fd2807SJeff Garzik return; 4461c6fd2807SJeff Garzik } 4462c6fd2807SJeff Garzik } 4463c6fd2807SJeff Garzik 4464c6fd2807SJeff Garzik /* move the HSM */ 4465c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 4466c6fd2807SJeff Garzik 4467c6fd2807SJeff Garzik /* another command or interrupt handler 4468c6fd2807SJeff Garzik * may be running at this point. 4469c6fd2807SJeff Garzik */ 4470c6fd2807SJeff Garzik if (poll_next) 4471c6fd2807SJeff Garzik goto fsm_start; 4472c6fd2807SJeff Garzik } 4473c6fd2807SJeff Garzik 4474c6fd2807SJeff Garzik /** 4475c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 4476c6fd2807SJeff Garzik * @ap: Port associated with device @dev 4477c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4478c6fd2807SJeff Garzik * 4479c6fd2807SJeff Garzik * LOCKING: 4480c6fd2807SJeff Garzik * None. 4481c6fd2807SJeff Garzik */ 4482c6fd2807SJeff Garzik 4483c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 4484c6fd2807SJeff Garzik { 4485c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 4486c6fd2807SJeff Garzik unsigned int i; 4487c6fd2807SJeff Garzik 4488c6fd2807SJeff Garzik /* no command while frozen */ 4489c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 4490c6fd2807SJeff Garzik return NULL; 4491c6fd2807SJeff Garzik 4492c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 4493c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 4494c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 4495c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 4496c6fd2807SJeff Garzik break; 4497c6fd2807SJeff Garzik } 4498c6fd2807SJeff Garzik 4499c6fd2807SJeff Garzik if (qc) 4500c6fd2807SJeff Garzik qc->tag = i; 4501c6fd2807SJeff Garzik 4502c6fd2807SJeff Garzik return qc; 4503c6fd2807SJeff Garzik } 4504c6fd2807SJeff Garzik 4505c6fd2807SJeff Garzik /** 4506c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 4507c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4508c6fd2807SJeff Garzik * 4509c6fd2807SJeff Garzik * LOCKING: 4510c6fd2807SJeff Garzik * None. 4511c6fd2807SJeff Garzik */ 4512c6fd2807SJeff Garzik 4513c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 4514c6fd2807SJeff Garzik { 4515c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 4516c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4517c6fd2807SJeff Garzik 4518c6fd2807SJeff Garzik qc = ata_qc_new(ap); 4519c6fd2807SJeff Garzik if (qc) { 4520c6fd2807SJeff Garzik qc->scsicmd = NULL; 4521c6fd2807SJeff Garzik qc->ap = ap; 4522c6fd2807SJeff Garzik qc->dev = dev; 4523c6fd2807SJeff Garzik 4524c6fd2807SJeff Garzik ata_qc_reinit(qc); 4525c6fd2807SJeff Garzik } 4526c6fd2807SJeff Garzik 4527c6fd2807SJeff Garzik return qc; 4528c6fd2807SJeff Garzik } 4529c6fd2807SJeff Garzik 4530c6fd2807SJeff Garzik /** 4531c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 4532c6fd2807SJeff Garzik * @qc: Command to complete 4533c6fd2807SJeff Garzik * 4534c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 4535c6fd2807SJeff Garzik * in case something prevents using it. 4536c6fd2807SJeff Garzik * 4537c6fd2807SJeff Garzik * LOCKING: 4538cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4539c6fd2807SJeff Garzik */ 4540c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 4541c6fd2807SJeff Garzik { 4542c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4543c6fd2807SJeff Garzik unsigned int tag; 4544c6fd2807SJeff Garzik 4545c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4546c6fd2807SJeff Garzik 4547c6fd2807SJeff Garzik qc->flags = 0; 4548c6fd2807SJeff Garzik tag = qc->tag; 4549c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 4550c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 4551c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 4552c6fd2807SJeff Garzik } 4553c6fd2807SJeff Garzik } 4554c6fd2807SJeff Garzik 4555c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 4556c6fd2807SJeff Garzik { 4557c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4558c6fd2807SJeff Garzik 4559c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4560c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4561c6fd2807SJeff Garzik 4562c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4563c6fd2807SJeff Garzik ata_sg_clean(qc); 4564c6fd2807SJeff Garzik 4565c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 4566c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) 4567c6fd2807SJeff Garzik ap->sactive &= ~(1 << qc->tag); 4568c6fd2807SJeff Garzik else 4569c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 4570c6fd2807SJeff Garzik 4571c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 4572c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 4573c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 4574c6fd2807SJeff Garzik */ 4575c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 4576c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 4577c6fd2807SJeff Garzik 4578c6fd2807SJeff Garzik /* call completion callback */ 4579c6fd2807SJeff Garzik qc->complete_fn(qc); 4580c6fd2807SJeff Garzik } 4581c6fd2807SJeff Garzik 458239599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 458339599a53STejun Heo { 458439599a53STejun Heo struct ata_port *ap = qc->ap; 458539599a53STejun Heo 458639599a53STejun Heo ap->ops->tf_read(ap, &qc->result_tf); 458739599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 458839599a53STejun Heo } 458939599a53STejun Heo 4590c6fd2807SJeff Garzik /** 4591c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 4592c6fd2807SJeff Garzik * @qc: Command to complete 4593c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 4594c6fd2807SJeff Garzik * 4595c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 4596c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 4597c6fd2807SJeff Garzik * 4598c6fd2807SJeff Garzik * LOCKING: 4599cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4600c6fd2807SJeff Garzik */ 4601c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 4602c6fd2807SJeff Garzik { 4603c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4604c6fd2807SJeff Garzik 4605c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 4606c6fd2807SJeff Garzik * synchronize EH with regular execution path. 4607c6fd2807SJeff Garzik * 4608c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 4609c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 4610c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 4611c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 4612c6fd2807SJeff Garzik * 4613c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 4614c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 4615c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 4616c6fd2807SJeff Garzik * taken care of. 4617c6fd2807SJeff Garzik */ 4618c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4619c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 4620c6fd2807SJeff Garzik 4621c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4622c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 4623c6fd2807SJeff Garzik 4624c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 4625c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 4626c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 462739599a53STejun Heo fill_result_tf(qc); 4628c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 4629c6fd2807SJeff Garzik return; 4630c6fd2807SJeff Garzik } 4631c6fd2807SJeff Garzik } 4632c6fd2807SJeff Garzik 4633c6fd2807SJeff Garzik /* read result TF if requested */ 4634c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 463539599a53STejun Heo fill_result_tf(qc); 4636c6fd2807SJeff Garzik 4637c6fd2807SJeff Garzik __ata_qc_complete(qc); 4638c6fd2807SJeff Garzik } else { 4639c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 4640c6fd2807SJeff Garzik return; 4641c6fd2807SJeff Garzik 4642c6fd2807SJeff Garzik /* read result TF if failed or requested */ 4643c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 464439599a53STejun Heo fill_result_tf(qc); 4645c6fd2807SJeff Garzik 4646c6fd2807SJeff Garzik __ata_qc_complete(qc); 4647c6fd2807SJeff Garzik } 4648c6fd2807SJeff Garzik } 4649c6fd2807SJeff Garzik 4650c6fd2807SJeff Garzik /** 4651c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 4652c6fd2807SJeff Garzik * @ap: port in question 4653c6fd2807SJeff Garzik * @qc_active: new qc_active mask 4654c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 4655c6fd2807SJeff Garzik * 4656c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 4657c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 4658c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 4659c6fd2807SJeff Garzik * and commands are completed accordingly. 4660c6fd2807SJeff Garzik * 4661c6fd2807SJeff Garzik * LOCKING: 4662cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4663c6fd2807SJeff Garzik * 4664c6fd2807SJeff Garzik * RETURNS: 4665c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 4666c6fd2807SJeff Garzik */ 4667c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 4668c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 4669c6fd2807SJeff Garzik { 4670c6fd2807SJeff Garzik int nr_done = 0; 4671c6fd2807SJeff Garzik u32 done_mask; 4672c6fd2807SJeff Garzik int i; 4673c6fd2807SJeff Garzik 4674c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 4675c6fd2807SJeff Garzik 4676c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 4677c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 4678c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 4679c6fd2807SJeff Garzik return -EINVAL; 4680c6fd2807SJeff Garzik } 4681c6fd2807SJeff Garzik 4682c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 4683c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4684c6fd2807SJeff Garzik 4685c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 4686c6fd2807SJeff Garzik continue; 4687c6fd2807SJeff Garzik 4688c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 4689c6fd2807SJeff Garzik if (finish_qc) 4690c6fd2807SJeff Garzik finish_qc(qc); 4691c6fd2807SJeff Garzik ata_qc_complete(qc); 4692c6fd2807SJeff Garzik nr_done++; 4693c6fd2807SJeff Garzik } 4694c6fd2807SJeff Garzik } 4695c6fd2807SJeff Garzik 4696c6fd2807SJeff Garzik return nr_done; 4697c6fd2807SJeff Garzik } 4698c6fd2807SJeff Garzik 4699c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 4700c6fd2807SJeff Garzik { 4701c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4702c6fd2807SJeff Garzik 4703c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4704c6fd2807SJeff Garzik case ATA_PROT_NCQ: 4705c6fd2807SJeff Garzik case ATA_PROT_DMA: 4706c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4707c6fd2807SJeff Garzik return 1; 4708c6fd2807SJeff Garzik 4709c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4710c6fd2807SJeff Garzik case ATA_PROT_PIO: 4711c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 4712c6fd2807SJeff Garzik return 1; 4713c6fd2807SJeff Garzik 4714c6fd2807SJeff Garzik /* fall through */ 4715c6fd2807SJeff Garzik 4716c6fd2807SJeff Garzik default: 4717c6fd2807SJeff Garzik return 0; 4718c6fd2807SJeff Garzik } 4719c6fd2807SJeff Garzik 4720c6fd2807SJeff Garzik /* never reached */ 4721c6fd2807SJeff Garzik } 4722c6fd2807SJeff Garzik 4723c6fd2807SJeff Garzik /** 4724c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 4725c6fd2807SJeff Garzik * @qc: command to issue to device 4726c6fd2807SJeff Garzik * 4727c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 4728c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 4729c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 4730c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 4731c6fd2807SJeff Garzik * 4732c6fd2807SJeff Garzik * LOCKING: 4733cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4734c6fd2807SJeff Garzik */ 4735c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 4736c6fd2807SJeff Garzik { 4737c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4738c6fd2807SJeff Garzik 4739c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 4740c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 4741c6fd2807SJeff Garzik * request ATAPI sense. 4742c6fd2807SJeff Garzik */ 4743c6fd2807SJeff Garzik WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); 4744c6fd2807SJeff Garzik 4745c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 4746c6fd2807SJeff Garzik WARN_ON(ap->sactive & (1 << qc->tag)); 4747c6fd2807SJeff Garzik ap->sactive |= 1 << qc->tag; 4748c6fd2807SJeff Garzik } else { 4749c6fd2807SJeff Garzik WARN_ON(ap->sactive); 4750c6fd2807SJeff Garzik ap->active_tag = qc->tag; 4751c6fd2807SJeff Garzik } 4752c6fd2807SJeff Garzik 4753c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 4754c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 4755c6fd2807SJeff Garzik 4756c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 4757c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 4758c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 4759c6fd2807SJeff Garzik goto sg_err; 4760c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 4761c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 4762c6fd2807SJeff Garzik goto sg_err; 4763c6fd2807SJeff Garzik } 4764c6fd2807SJeff Garzik } else { 4765c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4766c6fd2807SJeff Garzik } 4767c6fd2807SJeff Garzik 4768c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 4769c6fd2807SJeff Garzik 4770c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 4771c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4772c6fd2807SJeff Garzik goto err; 4773c6fd2807SJeff Garzik return; 4774c6fd2807SJeff Garzik 4775c6fd2807SJeff Garzik sg_err: 4776c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4777c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 4778c6fd2807SJeff Garzik err: 4779c6fd2807SJeff Garzik ata_qc_complete(qc); 4780c6fd2807SJeff Garzik } 4781c6fd2807SJeff Garzik 4782c6fd2807SJeff Garzik /** 4783c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 4784c6fd2807SJeff Garzik * @qc: command to issue to device 4785c6fd2807SJeff Garzik * 4786c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 4787c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 4788c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 4789c6fd2807SJeff Garzik * is slightly different. 4790c6fd2807SJeff Garzik * 4791c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 4792c6fd2807SJeff Garzik * 4793c6fd2807SJeff Garzik * LOCKING: 4794cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4795c6fd2807SJeff Garzik * 4796c6fd2807SJeff Garzik * RETURNS: 4797c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 4798c6fd2807SJeff Garzik */ 4799c6fd2807SJeff Garzik 4800c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 4801c6fd2807SJeff Garzik { 4802c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4803c6fd2807SJeff Garzik 4804c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 4805c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 4806c6fd2807SJeff Garzik */ 4807c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 4808c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4809c6fd2807SJeff Garzik case ATA_PROT_PIO: 4810c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4811c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4812c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 4813c6fd2807SJeff Garzik break; 4814c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4815c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 4816c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 4817c6fd2807SJeff Garzik BUG(); 4818c6fd2807SJeff Garzik break; 4819c6fd2807SJeff Garzik default: 4820c6fd2807SJeff Garzik break; 4821c6fd2807SJeff Garzik } 4822c6fd2807SJeff Garzik } 4823c6fd2807SJeff Garzik 48243d3cca37STejun Heo /* Some controllers show flaky interrupt behavior after 48253d3cca37STejun Heo * setting xfer mode. Use polling instead. 48263d3cca37STejun Heo */ 48273d3cca37STejun Heo if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && 48283d3cca37STejun Heo qc->tf.feature == SETFEATURES_XFER) && 48293d3cca37STejun Heo (ap->flags & ATA_FLAG_SETXFER_POLLING)) 48303d3cca37STejun Heo qc->tf.flags |= ATA_TFLAG_POLLING; 48313d3cca37STejun Heo 4832c6fd2807SJeff Garzik /* select the device */ 4833c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 4834c6fd2807SJeff Garzik 4835c6fd2807SJeff Garzik /* start the command */ 4836c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4837c6fd2807SJeff Garzik case ATA_PROT_NODATA: 4838c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4839c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4840c6fd2807SJeff Garzik 4841c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4842c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4843c6fd2807SJeff Garzik 4844c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4845c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4846c6fd2807SJeff Garzik 4847c6fd2807SJeff Garzik break; 4848c6fd2807SJeff Garzik 4849c6fd2807SJeff Garzik case ATA_PROT_DMA: 4850c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 4851c6fd2807SJeff Garzik 4852c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 4853c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 4854c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 4855c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4856c6fd2807SJeff Garzik break; 4857c6fd2807SJeff Garzik 4858c6fd2807SJeff Garzik case ATA_PROT_PIO: 4859c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4860c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4861c6fd2807SJeff Garzik 4862c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4863c6fd2807SJeff Garzik 4864c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4865c6fd2807SJeff Garzik /* PIO data out protocol */ 4866c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4867c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4868c6fd2807SJeff Garzik 4869c6fd2807SJeff Garzik /* always send first data block using 4870c6fd2807SJeff Garzik * the ata_pio_task() codepath. 4871c6fd2807SJeff Garzik */ 4872c6fd2807SJeff Garzik } else { 4873c6fd2807SJeff Garzik /* PIO data in protocol */ 4874c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4875c6fd2807SJeff Garzik 4876c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4877c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4878c6fd2807SJeff Garzik 4879c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4880c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4881c6fd2807SJeff Garzik */ 4882c6fd2807SJeff Garzik } 4883c6fd2807SJeff Garzik 4884c6fd2807SJeff Garzik break; 4885c6fd2807SJeff Garzik 4886c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4887c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4888c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4889c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4890c6fd2807SJeff Garzik 4891c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4892c6fd2807SJeff Garzik 4893c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4894c6fd2807SJeff Garzik 4895c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 4896c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 4897c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 4898c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4899c6fd2807SJeff Garzik break; 4900c6fd2807SJeff Garzik 4901c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4902c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 4903c6fd2807SJeff Garzik 4904c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 4905c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 4906c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4907c6fd2807SJeff Garzik 4908c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 4909c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4910c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4911c6fd2807SJeff Garzik break; 4912c6fd2807SJeff Garzik 4913c6fd2807SJeff Garzik default: 4914c6fd2807SJeff Garzik WARN_ON(1); 4915c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 4916c6fd2807SJeff Garzik } 4917c6fd2807SJeff Garzik 4918c6fd2807SJeff Garzik return 0; 4919c6fd2807SJeff Garzik } 4920c6fd2807SJeff Garzik 4921c6fd2807SJeff Garzik /** 4922c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 4923c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 4924c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 4925c6fd2807SJeff Garzik * 4926c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 4927c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 4928c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 4929c6fd2807SJeff Garzik * 4930c6fd2807SJeff Garzik * LOCKING: 4931cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4932c6fd2807SJeff Garzik * 4933c6fd2807SJeff Garzik * RETURNS: 4934c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 4935c6fd2807SJeff Garzik */ 4936c6fd2807SJeff Garzik 4937c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 4938c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 4939c6fd2807SJeff Garzik { 4940ea54763fSTejun Heo struct ata_eh_info *ehi = &ap->eh_info; 4941c6fd2807SJeff Garzik u8 status, host_stat = 0; 4942c6fd2807SJeff Garzik 4943c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 4944c6fd2807SJeff Garzik ap->id, qc->tf.protocol, ap->hsm_task_state); 4945c6fd2807SJeff Garzik 4946c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 4947c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4948c6fd2807SJeff Garzik case HSM_ST_FIRST: 4949c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 4950c6fd2807SJeff Garzik * at this state when ready to receive CDB. 4951c6fd2807SJeff Garzik */ 4952c6fd2807SJeff Garzik 4953c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 4954c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 4955c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 4956c6fd2807SJeff Garzik */ 4957c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4958c6fd2807SJeff Garzik goto idle_irq; 4959c6fd2807SJeff Garzik break; 4960c6fd2807SJeff Garzik case HSM_ST_LAST: 4961c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 4962c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 4963c6fd2807SJeff Garzik /* check status of DMA engine */ 4964c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 4965c6fd2807SJeff Garzik VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); 4966c6fd2807SJeff Garzik 4967c6fd2807SJeff Garzik /* if it's not our irq... */ 4968c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 4969c6fd2807SJeff Garzik goto idle_irq; 4970c6fd2807SJeff Garzik 4971c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 4972c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 4973c6fd2807SJeff Garzik 4974c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 4975c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 4976c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 4977c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4978c6fd2807SJeff Garzik } 4979c6fd2807SJeff Garzik } 4980c6fd2807SJeff Garzik break; 4981c6fd2807SJeff Garzik case HSM_ST: 4982c6fd2807SJeff Garzik break; 4983c6fd2807SJeff Garzik default: 4984c6fd2807SJeff Garzik goto idle_irq; 4985c6fd2807SJeff Garzik } 4986c6fd2807SJeff Garzik 4987c6fd2807SJeff Garzik /* check altstatus */ 4988c6fd2807SJeff Garzik status = ata_altstatus(ap); 4989c6fd2807SJeff Garzik if (status & ATA_BUSY) 4990c6fd2807SJeff Garzik goto idle_irq; 4991c6fd2807SJeff Garzik 4992c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 4993c6fd2807SJeff Garzik status = ata_chk_status(ap); 4994c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 4995c6fd2807SJeff Garzik goto idle_irq; 4996c6fd2807SJeff Garzik 4997c6fd2807SJeff Garzik /* ack bmdma irq events */ 4998c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 4999c6fd2807SJeff Garzik 5000c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5001ea54763fSTejun Heo 5002ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5003ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5004ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5005ea54763fSTejun Heo 5006c6fd2807SJeff Garzik return 1; /* irq handled */ 5007c6fd2807SJeff Garzik 5008c6fd2807SJeff Garzik idle_irq: 5009c6fd2807SJeff Garzik ap->stats.idle_irq++; 5010c6fd2807SJeff Garzik 5011c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5012c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 5013c6fd2807SJeff Garzik ata_irq_ack(ap, 0); /* debug trap */ 5014c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5015c6fd2807SJeff Garzik return 1; 5016c6fd2807SJeff Garzik } 5017c6fd2807SJeff Garzik #endif 5018c6fd2807SJeff Garzik return 0; /* irq not handled */ 5019c6fd2807SJeff Garzik } 5020c6fd2807SJeff Garzik 5021c6fd2807SJeff Garzik /** 5022c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5023c6fd2807SJeff Garzik * @irq: irq line (unused) 5024cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5025c6fd2807SJeff Garzik * 5026c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5027c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5028c6fd2807SJeff Garzik * 5029c6fd2807SJeff Garzik * LOCKING: 5030cca3974eSJeff Garzik * Obtains host lock during operation. 5031c6fd2807SJeff Garzik * 5032c6fd2807SJeff Garzik * RETURNS: 5033c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5034c6fd2807SJeff Garzik */ 5035c6fd2807SJeff Garzik 50367d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5037c6fd2807SJeff Garzik { 5038cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5039c6fd2807SJeff Garzik unsigned int i; 5040c6fd2807SJeff Garzik unsigned int handled = 0; 5041c6fd2807SJeff Garzik unsigned long flags; 5042c6fd2807SJeff Garzik 5043c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5044cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5045c6fd2807SJeff Garzik 5046cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5047c6fd2807SJeff Garzik struct ata_port *ap; 5048c6fd2807SJeff Garzik 5049cca3974eSJeff Garzik ap = host->ports[i]; 5050c6fd2807SJeff Garzik if (ap && 5051c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 5052c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5053c6fd2807SJeff Garzik 5054c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, ap->active_tag); 5055c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 5056c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 5057c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 5058c6fd2807SJeff Garzik } 5059c6fd2807SJeff Garzik } 5060c6fd2807SJeff Garzik 5061cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 5062c6fd2807SJeff Garzik 5063c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 5064c6fd2807SJeff Garzik } 5065c6fd2807SJeff Garzik 5066c6fd2807SJeff Garzik /** 5067c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5068c6fd2807SJeff Garzik * @ap: ATA port to test SCR accessibility for 5069c6fd2807SJeff Garzik * 5070c6fd2807SJeff Garzik * Test whether SCRs are accessible for @ap. 5071c6fd2807SJeff Garzik * 5072c6fd2807SJeff Garzik * LOCKING: 5073c6fd2807SJeff Garzik * None. 5074c6fd2807SJeff Garzik * 5075c6fd2807SJeff Garzik * RETURNS: 5076c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5077c6fd2807SJeff Garzik */ 5078c6fd2807SJeff Garzik int sata_scr_valid(struct ata_port *ap) 5079c6fd2807SJeff Garzik { 5080c6fd2807SJeff Garzik return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; 5081c6fd2807SJeff Garzik } 5082c6fd2807SJeff Garzik 5083c6fd2807SJeff Garzik /** 5084c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5085c6fd2807SJeff Garzik * @ap: ATA port to read SCR for 5086c6fd2807SJeff Garzik * @reg: SCR to read 5087c6fd2807SJeff Garzik * @val: Place to store read value 5088c6fd2807SJeff Garzik * 5089c6fd2807SJeff Garzik * Read SCR register @reg of @ap into *@val. This function is 5090c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5091c6fd2807SJeff Garzik * and the port implements ->scr_read. 5092c6fd2807SJeff Garzik * 5093c6fd2807SJeff Garzik * LOCKING: 5094c6fd2807SJeff Garzik * None. 5095c6fd2807SJeff Garzik * 5096c6fd2807SJeff Garzik * RETURNS: 5097c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5098c6fd2807SJeff Garzik */ 5099c6fd2807SJeff Garzik int sata_scr_read(struct ata_port *ap, int reg, u32 *val) 5100c6fd2807SJeff Garzik { 5101c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5102c6fd2807SJeff Garzik *val = ap->ops->scr_read(ap, reg); 5103c6fd2807SJeff Garzik return 0; 5104c6fd2807SJeff Garzik } 5105c6fd2807SJeff Garzik return -EOPNOTSUPP; 5106c6fd2807SJeff Garzik } 5107c6fd2807SJeff Garzik 5108c6fd2807SJeff Garzik /** 5109c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5110c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5111c6fd2807SJeff Garzik * @reg: SCR to write 5112c6fd2807SJeff Garzik * @val: value to write 5113c6fd2807SJeff Garzik * 5114c6fd2807SJeff Garzik * Write @val to SCR register @reg of @ap. This function is 5115c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5116c6fd2807SJeff Garzik * and the port implements ->scr_read. 5117c6fd2807SJeff Garzik * 5118c6fd2807SJeff Garzik * LOCKING: 5119c6fd2807SJeff Garzik * None. 5120c6fd2807SJeff Garzik * 5121c6fd2807SJeff Garzik * RETURNS: 5122c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5123c6fd2807SJeff Garzik */ 5124c6fd2807SJeff Garzik int sata_scr_write(struct ata_port *ap, int reg, u32 val) 5125c6fd2807SJeff Garzik { 5126c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5127c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5128c6fd2807SJeff Garzik return 0; 5129c6fd2807SJeff Garzik } 5130c6fd2807SJeff Garzik return -EOPNOTSUPP; 5131c6fd2807SJeff Garzik } 5132c6fd2807SJeff Garzik 5133c6fd2807SJeff Garzik /** 5134c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5135c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5136c6fd2807SJeff Garzik * @reg: SCR to write 5137c6fd2807SJeff Garzik * @val: value to write 5138c6fd2807SJeff Garzik * 5139c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5140c6fd2807SJeff Garzik * function performs flush after writing to the register. 5141c6fd2807SJeff Garzik * 5142c6fd2807SJeff Garzik * LOCKING: 5143c6fd2807SJeff Garzik * None. 5144c6fd2807SJeff Garzik * 5145c6fd2807SJeff Garzik * RETURNS: 5146c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5147c6fd2807SJeff Garzik */ 5148c6fd2807SJeff Garzik int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) 5149c6fd2807SJeff Garzik { 5150c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5151c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5152c6fd2807SJeff Garzik ap->ops->scr_read(ap, reg); 5153c6fd2807SJeff Garzik return 0; 5154c6fd2807SJeff Garzik } 5155c6fd2807SJeff Garzik return -EOPNOTSUPP; 5156c6fd2807SJeff Garzik } 5157c6fd2807SJeff Garzik 5158c6fd2807SJeff Garzik /** 5159c6fd2807SJeff Garzik * ata_port_online - test whether the given port is online 5160c6fd2807SJeff Garzik * @ap: ATA port to test 5161c6fd2807SJeff Garzik * 5162c6fd2807SJeff Garzik * Test whether @ap is online. Note that this function returns 0 5163c6fd2807SJeff Garzik * if online status of @ap cannot be obtained, so 5164c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5165c6fd2807SJeff Garzik * 5166c6fd2807SJeff Garzik * LOCKING: 5167c6fd2807SJeff Garzik * None. 5168c6fd2807SJeff Garzik * 5169c6fd2807SJeff Garzik * RETURNS: 5170c6fd2807SJeff Garzik * 1 if the port online status is available and online. 5171c6fd2807SJeff Garzik */ 5172c6fd2807SJeff Garzik int ata_port_online(struct ata_port *ap) 5173c6fd2807SJeff Garzik { 5174c6fd2807SJeff Garzik u32 sstatus; 5175c6fd2807SJeff Garzik 5176c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) 5177c6fd2807SJeff Garzik return 1; 5178c6fd2807SJeff Garzik return 0; 5179c6fd2807SJeff Garzik } 5180c6fd2807SJeff Garzik 5181c6fd2807SJeff Garzik /** 5182c6fd2807SJeff Garzik * ata_port_offline - test whether the given port is offline 5183c6fd2807SJeff Garzik * @ap: ATA port to test 5184c6fd2807SJeff Garzik * 5185c6fd2807SJeff Garzik * Test whether @ap is offline. Note that this function returns 5186c6fd2807SJeff Garzik * 0 if offline status of @ap cannot be obtained, so 5187c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5188c6fd2807SJeff Garzik * 5189c6fd2807SJeff Garzik * LOCKING: 5190c6fd2807SJeff Garzik * None. 5191c6fd2807SJeff Garzik * 5192c6fd2807SJeff Garzik * RETURNS: 5193c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 5194c6fd2807SJeff Garzik */ 5195c6fd2807SJeff Garzik int ata_port_offline(struct ata_port *ap) 5196c6fd2807SJeff Garzik { 5197c6fd2807SJeff Garzik u32 sstatus; 5198c6fd2807SJeff Garzik 5199c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) 5200c6fd2807SJeff Garzik return 1; 5201c6fd2807SJeff Garzik return 0; 5202c6fd2807SJeff Garzik } 5203c6fd2807SJeff Garzik 5204c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 5205c6fd2807SJeff Garzik { 5206c6fd2807SJeff Garzik unsigned int err_mask; 5207c6fd2807SJeff Garzik u8 cmd; 5208c6fd2807SJeff Garzik 5209c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 5210c6fd2807SJeff Garzik return 0; 5211c6fd2807SJeff Garzik 52126fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 5213c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 5214c6fd2807SJeff Garzik else 5215c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 5216c6fd2807SJeff Garzik 5217c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 5218c6fd2807SJeff Garzik if (err_mask) { 5219c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 5220c6fd2807SJeff Garzik return -EIO; 5221c6fd2807SJeff Garzik } 5222c6fd2807SJeff Garzik 5223c6fd2807SJeff Garzik return 0; 5224c6fd2807SJeff Garzik } 5225c6fd2807SJeff Garzik 5226cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5227cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5228cca3974eSJeff Garzik int wait) 5229c6fd2807SJeff Garzik { 5230c6fd2807SJeff Garzik unsigned long flags; 5231c6fd2807SJeff Garzik int i, rc; 5232c6fd2807SJeff Garzik 5233cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5234cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5235c6fd2807SJeff Garzik 5236c6fd2807SJeff Garzik /* Previous resume operation might still be in 5237c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5238c6fd2807SJeff Garzik */ 5239c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5240c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5241c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5242c6fd2807SJeff Garzik } 5243c6fd2807SJeff Garzik 5244c6fd2807SJeff Garzik /* request PM ops to EH */ 5245c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5246c6fd2807SJeff Garzik 5247c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5248c6fd2807SJeff Garzik if (wait) { 5249c6fd2807SJeff Garzik rc = 0; 5250c6fd2807SJeff Garzik ap->pm_result = &rc; 5251c6fd2807SJeff Garzik } 5252c6fd2807SJeff Garzik 5253c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5254c6fd2807SJeff Garzik ap->eh_info.action |= action; 5255c6fd2807SJeff Garzik ap->eh_info.flags |= ehi_flags; 5256c6fd2807SJeff Garzik 5257c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5258c6fd2807SJeff Garzik 5259c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5260c6fd2807SJeff Garzik 5261c6fd2807SJeff Garzik /* wait and check result */ 5262c6fd2807SJeff Garzik if (wait) { 5263c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5264c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5265c6fd2807SJeff Garzik if (rc) 5266c6fd2807SJeff Garzik return rc; 5267c6fd2807SJeff Garzik } 5268c6fd2807SJeff Garzik } 5269c6fd2807SJeff Garzik 5270c6fd2807SJeff Garzik return 0; 5271c6fd2807SJeff Garzik } 5272c6fd2807SJeff Garzik 5273c6fd2807SJeff Garzik /** 5274cca3974eSJeff Garzik * ata_host_suspend - suspend host 5275cca3974eSJeff Garzik * @host: host to suspend 5276c6fd2807SJeff Garzik * @mesg: PM message 5277c6fd2807SJeff Garzik * 5278cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5279c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5280c6fd2807SJeff Garzik * to finish. 5281c6fd2807SJeff Garzik * 5282c6fd2807SJeff Garzik * LOCKING: 5283c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5284c6fd2807SJeff Garzik * 5285c6fd2807SJeff Garzik * RETURNS: 5286c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5287c6fd2807SJeff Garzik */ 5288cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5289c6fd2807SJeff Garzik { 5290c6fd2807SJeff Garzik int i, j, rc; 5291c6fd2807SJeff Garzik 5292cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 5293c6fd2807SJeff Garzik if (rc) 5294c6fd2807SJeff Garzik goto fail; 5295c6fd2807SJeff Garzik 5296c6fd2807SJeff Garzik /* EH is quiescent now. Fail if we have any ready device. 5297c6fd2807SJeff Garzik * This happens if hotplug occurs between completion of device 5298c6fd2807SJeff Garzik * suspension and here. 5299c6fd2807SJeff Garzik */ 5300cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5301cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5302c6fd2807SJeff Garzik 5303c6fd2807SJeff Garzik for (j = 0; j < ATA_MAX_DEVICES; j++) { 5304c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[j]; 5305c6fd2807SJeff Garzik 5306c6fd2807SJeff Garzik if (ata_dev_ready(dev)) { 5307c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 5308c6fd2807SJeff Garzik "suspend failed, device %d " 5309c6fd2807SJeff Garzik "still active\n", dev->devno); 5310c6fd2807SJeff Garzik rc = -EBUSY; 5311c6fd2807SJeff Garzik goto fail; 5312c6fd2807SJeff Garzik } 5313c6fd2807SJeff Garzik } 5314c6fd2807SJeff Garzik } 5315c6fd2807SJeff Garzik 5316cca3974eSJeff Garzik host->dev->power.power_state = mesg; 5317c6fd2807SJeff Garzik return 0; 5318c6fd2807SJeff Garzik 5319c6fd2807SJeff Garzik fail: 5320cca3974eSJeff Garzik ata_host_resume(host); 5321c6fd2807SJeff Garzik return rc; 5322c6fd2807SJeff Garzik } 5323c6fd2807SJeff Garzik 5324c6fd2807SJeff Garzik /** 5325cca3974eSJeff Garzik * ata_host_resume - resume host 5326cca3974eSJeff Garzik * @host: host to resume 5327c6fd2807SJeff Garzik * 5328cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5329c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5330c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5331c6fd2807SJeff Garzik * 5332c6fd2807SJeff Garzik * LOCKING: 5333c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5334c6fd2807SJeff Garzik */ 5335cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5336c6fd2807SJeff Garzik { 5337cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 5338c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 5339cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 5340c6fd2807SJeff Garzik } 5341c6fd2807SJeff Garzik 5342c6fd2807SJeff Garzik /** 5343c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5344c6fd2807SJeff Garzik * @ap: Port to initialize 5345c6fd2807SJeff Garzik * 5346c6fd2807SJeff Garzik * Called just after data structures for each port are 5347c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5348c6fd2807SJeff Garzik * 5349c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5350c6fd2807SJeff Garzik * 5351c6fd2807SJeff Garzik * LOCKING: 5352c6fd2807SJeff Garzik * Inherited from caller. 5353c6fd2807SJeff Garzik */ 5354c6fd2807SJeff Garzik 5355c6fd2807SJeff Garzik int ata_port_start (struct ata_port *ap) 5356c6fd2807SJeff Garzik { 5357c6fd2807SJeff Garzik struct device *dev = ap->dev; 5358c6fd2807SJeff Garzik int rc; 5359c6fd2807SJeff Garzik 5360c6fd2807SJeff Garzik ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); 5361c6fd2807SJeff Garzik if (!ap->prd) 5362c6fd2807SJeff Garzik return -ENOMEM; 5363c6fd2807SJeff Garzik 5364c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 5365c6fd2807SJeff Garzik if (rc) { 5366c6fd2807SJeff Garzik dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); 5367c6fd2807SJeff Garzik return rc; 5368c6fd2807SJeff Garzik } 5369c6fd2807SJeff Garzik 5370c6fd2807SJeff Garzik DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); 5371c6fd2807SJeff Garzik 5372c6fd2807SJeff Garzik return 0; 5373c6fd2807SJeff Garzik } 5374c6fd2807SJeff Garzik 5375c6fd2807SJeff Garzik 5376c6fd2807SJeff Garzik /** 5377c6fd2807SJeff Garzik * ata_port_stop - Undo ata_port_start() 5378c6fd2807SJeff Garzik * @ap: Port to shut down 5379c6fd2807SJeff Garzik * 5380c6fd2807SJeff Garzik * Frees the PRD table. 5381c6fd2807SJeff Garzik * 5382c6fd2807SJeff Garzik * May be used as the port_stop() entry in ata_port_operations. 5383c6fd2807SJeff Garzik * 5384c6fd2807SJeff Garzik * LOCKING: 5385c6fd2807SJeff Garzik * Inherited from caller. 5386c6fd2807SJeff Garzik */ 5387c6fd2807SJeff Garzik 5388c6fd2807SJeff Garzik void ata_port_stop (struct ata_port *ap) 5389c6fd2807SJeff Garzik { 5390c6fd2807SJeff Garzik struct device *dev = ap->dev; 5391c6fd2807SJeff Garzik 5392c6fd2807SJeff Garzik dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); 5393c6fd2807SJeff Garzik ata_pad_free(ap, dev); 5394c6fd2807SJeff Garzik } 5395c6fd2807SJeff Garzik 5396cca3974eSJeff Garzik void ata_host_stop (struct ata_host *host) 5397c6fd2807SJeff Garzik { 5398cca3974eSJeff Garzik if (host->mmio_base) 5399cca3974eSJeff Garzik iounmap(host->mmio_base); 5400c6fd2807SJeff Garzik } 5401c6fd2807SJeff Garzik 5402c6fd2807SJeff Garzik /** 5403c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5404c6fd2807SJeff Garzik * @dev: Device structure to initialize 5405c6fd2807SJeff Garzik * 5406c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5407c6fd2807SJeff Garzik * 5408c6fd2807SJeff Garzik * LOCKING: 5409c6fd2807SJeff Garzik * Inherited from caller. 5410c6fd2807SJeff Garzik */ 5411c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5412c6fd2807SJeff Garzik { 5413c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5414c6fd2807SJeff Garzik unsigned long flags; 5415c6fd2807SJeff Garzik 5416c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 5417c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5418c6fd2807SJeff Garzik 5419c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 5420c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 5421cca3974eSJeff Garzik * host lock. 5422c6fd2807SJeff Garzik */ 5423c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5424c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 5425c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5426c6fd2807SJeff Garzik 5427c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 5428c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 5429c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 5430c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 5431c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 5432c6fd2807SJeff Garzik } 5433c6fd2807SJeff Garzik 5434c6fd2807SJeff Garzik /** 5435c6fd2807SJeff Garzik * ata_port_init - Initialize an ata_port structure 5436c6fd2807SJeff Garzik * @ap: Structure to initialize 5437cca3974eSJeff Garzik * @host: Collection of hosts to which @ap belongs 5438c6fd2807SJeff Garzik * @ent: Probe information provided by low-level driver 5439c6fd2807SJeff Garzik * @port_no: Port number associated with this ata_port 5440c6fd2807SJeff Garzik * 5441c6fd2807SJeff Garzik * Initialize a new ata_port structure. 5442c6fd2807SJeff Garzik * 5443c6fd2807SJeff Garzik * LOCKING: 5444c6fd2807SJeff Garzik * Inherited from caller. 5445c6fd2807SJeff Garzik */ 5446cca3974eSJeff Garzik void ata_port_init(struct ata_port *ap, struct ata_host *host, 5447c6fd2807SJeff Garzik const struct ata_probe_ent *ent, unsigned int port_no) 5448c6fd2807SJeff Garzik { 5449c6fd2807SJeff Garzik unsigned int i; 5450c6fd2807SJeff Garzik 5451cca3974eSJeff Garzik ap->lock = &host->lock; 5452c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 5453c6fd2807SJeff Garzik ap->id = ata_unique_id++; 5454c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 5455cca3974eSJeff Garzik ap->host = host; 5456c6fd2807SJeff Garzik ap->dev = ent->dev; 5457c6fd2807SJeff Garzik ap->port_no = port_no; 5458fea63e38STejun Heo if (port_no == 1 && ent->pinfo2) { 5459fea63e38STejun Heo ap->pio_mask = ent->pinfo2->pio_mask; 5460fea63e38STejun Heo ap->mwdma_mask = ent->pinfo2->mwdma_mask; 5461fea63e38STejun Heo ap->udma_mask = ent->pinfo2->udma_mask; 5462fea63e38STejun Heo ap->flags |= ent->pinfo2->flags; 5463fea63e38STejun Heo ap->ops = ent->pinfo2->port_ops; 5464fea63e38STejun Heo } else { 5465c6fd2807SJeff Garzik ap->pio_mask = ent->pio_mask; 5466c6fd2807SJeff Garzik ap->mwdma_mask = ent->mwdma_mask; 5467c6fd2807SJeff Garzik ap->udma_mask = ent->udma_mask; 5468cca3974eSJeff Garzik ap->flags |= ent->port_flags; 5469c6fd2807SJeff Garzik ap->ops = ent->port_ops; 5470fea63e38STejun Heo } 5471c6fd2807SJeff Garzik ap->hw_sata_spd_limit = UINT_MAX; 5472c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 5473c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 5474c6fd2807SJeff Garzik 5475c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 5476c6fd2807SJeff Garzik /* turn on all debugging levels */ 5477c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 5478c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 5479c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 5480c6fd2807SJeff Garzik #else 5481c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 5482c6fd2807SJeff Garzik #endif 5483c6fd2807SJeff Garzik 5484c6fd2807SJeff Garzik INIT_WORK(&ap->port_task, NULL, NULL); 5485c6fd2807SJeff Garzik INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap); 5486c6fd2807SJeff Garzik INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap); 5487c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 5488c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 5489c6fd2807SJeff Garzik 5490c6fd2807SJeff Garzik /* set cable type */ 5491c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 5492c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA) 5493c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 5494c6fd2807SJeff Garzik 5495c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 5496c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[i]; 5497c6fd2807SJeff Garzik dev->ap = ap; 5498c6fd2807SJeff Garzik dev->devno = i; 5499c6fd2807SJeff Garzik ata_dev_init(dev); 5500c6fd2807SJeff Garzik } 5501c6fd2807SJeff Garzik 5502c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5503c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 5504c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 5505c6fd2807SJeff Garzik #endif 5506c6fd2807SJeff Garzik 5507c6fd2807SJeff Garzik memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); 5508c6fd2807SJeff Garzik } 5509c6fd2807SJeff Garzik 5510c6fd2807SJeff Garzik /** 5511c6fd2807SJeff Garzik * ata_port_init_shost - Initialize SCSI host associated with ATA port 5512c6fd2807SJeff Garzik * @ap: ATA port to initialize SCSI host for 5513c6fd2807SJeff Garzik * @shost: SCSI host associated with @ap 5514c6fd2807SJeff Garzik * 5515c6fd2807SJeff Garzik * Initialize SCSI host @shost associated with ATA port @ap. 5516c6fd2807SJeff Garzik * 5517c6fd2807SJeff Garzik * LOCKING: 5518c6fd2807SJeff Garzik * Inherited from caller. 5519c6fd2807SJeff Garzik */ 5520c6fd2807SJeff Garzik static void ata_port_init_shost(struct ata_port *ap, struct Scsi_Host *shost) 5521c6fd2807SJeff Garzik { 5522cca3974eSJeff Garzik ap->scsi_host = shost; 5523c6fd2807SJeff Garzik 5524c6fd2807SJeff Garzik shost->unique_id = ap->id; 5525c6fd2807SJeff Garzik shost->max_id = 16; 5526c6fd2807SJeff Garzik shost->max_lun = 1; 5527c6fd2807SJeff Garzik shost->max_channel = 1; 5528c6fd2807SJeff Garzik shost->max_cmd_len = 12; 5529c6fd2807SJeff Garzik } 5530c6fd2807SJeff Garzik 5531c6fd2807SJeff Garzik /** 5532c6fd2807SJeff Garzik * ata_port_add - Attach low-level ATA driver to system 5533c6fd2807SJeff Garzik * @ent: Information provided by low-level driver 5534cca3974eSJeff Garzik * @host: Collections of ports to which we add 5535c6fd2807SJeff Garzik * @port_no: Port number associated with this host 5536c6fd2807SJeff Garzik * 5537c6fd2807SJeff Garzik * Attach low-level ATA driver to system. 5538c6fd2807SJeff Garzik * 5539c6fd2807SJeff Garzik * LOCKING: 5540c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5541c6fd2807SJeff Garzik * 5542c6fd2807SJeff Garzik * RETURNS: 5543c6fd2807SJeff Garzik * New ata_port on success, for NULL on error. 5544c6fd2807SJeff Garzik */ 5545c6fd2807SJeff Garzik static struct ata_port * ata_port_add(const struct ata_probe_ent *ent, 5546cca3974eSJeff Garzik struct ata_host *host, 5547c6fd2807SJeff Garzik unsigned int port_no) 5548c6fd2807SJeff Garzik { 5549c6fd2807SJeff Garzik struct Scsi_Host *shost; 5550c6fd2807SJeff Garzik struct ata_port *ap; 5551c6fd2807SJeff Garzik 5552c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 5553c6fd2807SJeff Garzik 5554c6fd2807SJeff Garzik if (!ent->port_ops->error_handler && 5555cca3974eSJeff Garzik !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { 5556c6fd2807SJeff Garzik printk(KERN_ERR "ata%u: no reset mechanism available\n", 5557c6fd2807SJeff Garzik port_no); 5558c6fd2807SJeff Garzik return NULL; 5559c6fd2807SJeff Garzik } 5560c6fd2807SJeff Garzik 5561c6fd2807SJeff Garzik shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); 5562c6fd2807SJeff Garzik if (!shost) 5563c6fd2807SJeff Garzik return NULL; 5564c6fd2807SJeff Garzik 5565c6fd2807SJeff Garzik shost->transportt = &ata_scsi_transport_template; 5566c6fd2807SJeff Garzik 5567c6fd2807SJeff Garzik ap = ata_shost_to_port(shost); 5568c6fd2807SJeff Garzik 5569cca3974eSJeff Garzik ata_port_init(ap, host, ent, port_no); 5570c6fd2807SJeff Garzik ata_port_init_shost(ap, shost); 5571c6fd2807SJeff Garzik 5572c6fd2807SJeff Garzik return ap; 5573c6fd2807SJeff Garzik } 5574c6fd2807SJeff Garzik 5575c6fd2807SJeff Garzik /** 5576cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 5577cca3974eSJeff Garzik * @host: host to initialize 5578cca3974eSJeff Garzik * @dev: device host is attached to 5579cca3974eSJeff Garzik * @flags: host flags 5580c6fd2807SJeff Garzik * @ops: port_ops 5581c6fd2807SJeff Garzik * 5582c6fd2807SJeff Garzik * LOCKING: 5583c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5584c6fd2807SJeff Garzik * 5585c6fd2807SJeff Garzik */ 5586c6fd2807SJeff Garzik 5587cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 5588cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 5589c6fd2807SJeff Garzik { 5590cca3974eSJeff Garzik spin_lock_init(&host->lock); 5591cca3974eSJeff Garzik host->dev = dev; 5592cca3974eSJeff Garzik host->flags = flags; 5593cca3974eSJeff Garzik host->ops = ops; 5594c6fd2807SJeff Garzik } 5595c6fd2807SJeff Garzik 5596c6fd2807SJeff Garzik /** 5597c6fd2807SJeff Garzik * ata_device_add - Register hardware device with ATA and SCSI layers 5598c6fd2807SJeff Garzik * @ent: Probe information describing hardware device to be registered 5599c6fd2807SJeff Garzik * 5600c6fd2807SJeff Garzik * This function processes the information provided in the probe 5601c6fd2807SJeff Garzik * information struct @ent, allocates the necessary ATA and SCSI 5602c6fd2807SJeff Garzik * host information structures, initializes them, and registers 5603c6fd2807SJeff Garzik * everything with requisite kernel subsystems. 5604c6fd2807SJeff Garzik * 5605c6fd2807SJeff Garzik * This function requests irqs, probes the ATA bus, and probes 5606c6fd2807SJeff Garzik * the SCSI bus. 5607c6fd2807SJeff Garzik * 5608c6fd2807SJeff Garzik * LOCKING: 5609c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5610c6fd2807SJeff Garzik * 5611c6fd2807SJeff Garzik * RETURNS: 5612c6fd2807SJeff Garzik * Number of ports registered. Zero on error (no ports registered). 5613c6fd2807SJeff Garzik */ 5614c6fd2807SJeff Garzik int ata_device_add(const struct ata_probe_ent *ent) 5615c6fd2807SJeff Garzik { 5616c6fd2807SJeff Garzik unsigned int i; 5617c6fd2807SJeff Garzik struct device *dev = ent->dev; 5618cca3974eSJeff Garzik struct ata_host *host; 5619c6fd2807SJeff Garzik int rc; 5620c6fd2807SJeff Garzik 5621c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 562202f076aaSAlan Cox 562302f076aaSAlan Cox if (ent->irq == 0) { 562402f076aaSAlan Cox dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n"); 562502f076aaSAlan Cox return 0; 562602f076aaSAlan Cox } 5627c6fd2807SJeff Garzik /* alloc a container for our list of ATA ports (buses) */ 5628cca3974eSJeff Garzik host = kzalloc(sizeof(struct ata_host) + 5629c6fd2807SJeff Garzik (ent->n_ports * sizeof(void *)), GFP_KERNEL); 5630cca3974eSJeff Garzik if (!host) 5631c6fd2807SJeff Garzik return 0; 5632c6fd2807SJeff Garzik 5633cca3974eSJeff Garzik ata_host_init(host, dev, ent->_host_flags, ent->port_ops); 5634cca3974eSJeff Garzik host->n_ports = ent->n_ports; 5635cca3974eSJeff Garzik host->irq = ent->irq; 5636cca3974eSJeff Garzik host->irq2 = ent->irq2; 5637cca3974eSJeff Garzik host->mmio_base = ent->mmio_base; 5638cca3974eSJeff Garzik host->private_data = ent->private_data; 5639c6fd2807SJeff Garzik 5640c6fd2807SJeff Garzik /* register each port bound to this device */ 5641cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5642c6fd2807SJeff Garzik struct ata_port *ap; 5643c6fd2807SJeff Garzik unsigned long xfer_mode_mask; 5644c6fd2807SJeff Garzik int irq_line = ent->irq; 5645c6fd2807SJeff Garzik 5646cca3974eSJeff Garzik ap = ata_port_add(ent, host, i); 5647c38778c3SDave Jones host->ports[i] = ap; 5648c6fd2807SJeff Garzik if (!ap) 5649c6fd2807SJeff Garzik goto err_out; 5650c6fd2807SJeff Garzik 5651c6fd2807SJeff Garzik /* dummy? */ 5652c6fd2807SJeff Garzik if (ent->dummy_port_mask & (1 << i)) { 5653c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 5654c6fd2807SJeff Garzik ap->ops = &ata_dummy_port_ops; 5655c6fd2807SJeff Garzik continue; 5656c6fd2807SJeff Garzik } 5657c6fd2807SJeff Garzik 5658c6fd2807SJeff Garzik /* start port */ 5659c6fd2807SJeff Garzik rc = ap->ops->port_start(ap); 5660c6fd2807SJeff Garzik if (rc) { 5661cca3974eSJeff Garzik host->ports[i] = NULL; 5662cca3974eSJeff Garzik scsi_host_put(ap->scsi_host); 5663c6fd2807SJeff Garzik goto err_out; 5664c6fd2807SJeff Garzik } 5665c6fd2807SJeff Garzik 5666c6fd2807SJeff Garzik /* Report the secondary IRQ for second channel legacy */ 5667c6fd2807SJeff Garzik if (i == 1 && ent->irq2) 5668c6fd2807SJeff Garzik irq_line = ent->irq2; 5669c6fd2807SJeff Garzik 5670c6fd2807SJeff Garzik xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | 5671c6fd2807SJeff Garzik (ap->mwdma_mask << ATA_SHIFT_MWDMA) | 5672c6fd2807SJeff Garzik (ap->pio_mask << ATA_SHIFT_PIO); 5673c6fd2807SJeff Garzik 5674c6fd2807SJeff Garzik /* print per-port info to dmesg */ 5675c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX " 5676c6fd2807SJeff Garzik "ctl 0x%lX bmdma 0x%lX irq %d\n", 5677c6fd2807SJeff Garzik ap->flags & ATA_FLAG_SATA ? 'S' : 'P', 5678c6fd2807SJeff Garzik ata_mode_string(xfer_mode_mask), 5679c6fd2807SJeff Garzik ap->ioaddr.cmd_addr, 5680c6fd2807SJeff Garzik ap->ioaddr.ctl_addr, 5681c6fd2807SJeff Garzik ap->ioaddr.bmdma_addr, 5682c6fd2807SJeff Garzik irq_line); 5683c6fd2807SJeff Garzik 5684*0f0a3ad3STejun Heo /* freeze port before requesting IRQ */ 5685*0f0a3ad3STejun Heo ata_eh_freeze_port(ap); 5686c6fd2807SJeff Garzik } 5687c6fd2807SJeff Garzik 5688c6fd2807SJeff Garzik /* obtain irq, that may be shared between channels */ 5689c6fd2807SJeff Garzik rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, 5690cca3974eSJeff Garzik DRV_NAME, host); 5691c6fd2807SJeff Garzik if (rc) { 5692c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5693c6fd2807SJeff Garzik ent->irq, rc); 5694c6fd2807SJeff Garzik goto err_out; 5695c6fd2807SJeff Garzik } 5696c6fd2807SJeff Garzik 5697c6fd2807SJeff Garzik /* do we have a second IRQ for the other channel, eg legacy mode */ 5698c6fd2807SJeff Garzik if (ent->irq2) { 5699c6fd2807SJeff Garzik /* We will get weird core code crashes later if this is true 5700c6fd2807SJeff Garzik so trap it now */ 5701c6fd2807SJeff Garzik BUG_ON(ent->irq == ent->irq2); 5702c6fd2807SJeff Garzik 5703c6fd2807SJeff Garzik rc = request_irq(ent->irq2, ent->port_ops->irq_handler, ent->irq_flags, 5704cca3974eSJeff Garzik DRV_NAME, host); 5705c6fd2807SJeff Garzik if (rc) { 5706c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5707c6fd2807SJeff Garzik ent->irq2, rc); 5708c6fd2807SJeff Garzik goto err_out_free_irq; 5709c6fd2807SJeff Garzik } 5710c6fd2807SJeff Garzik } 5711c6fd2807SJeff Garzik 5712c6fd2807SJeff Garzik /* perform each probe synchronously */ 5713c6fd2807SJeff Garzik DPRINTK("probe begin\n"); 5714cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5715cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5716c6fd2807SJeff Garzik u32 scontrol; 5717c6fd2807SJeff Garzik int rc; 5718c6fd2807SJeff Garzik 5719c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 5720c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { 5721c6fd2807SJeff Garzik int spd = (scontrol >> 4) & 0xf; 5722c6fd2807SJeff Garzik ap->hw_sata_spd_limit &= (1 << spd) - 1; 5723c6fd2807SJeff Garzik } 5724c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5725c6fd2807SJeff Garzik 5726cca3974eSJeff Garzik rc = scsi_add_host(ap->scsi_host, dev); 5727c6fd2807SJeff Garzik if (rc) { 5728c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n"); 5729c6fd2807SJeff Garzik /* FIXME: do something useful here */ 5730c6fd2807SJeff Garzik /* FIXME: handle unconditional calls to 5731c6fd2807SJeff Garzik * scsi_scan_host and ata_host_remove, below, 5732c6fd2807SJeff Garzik * at the very least 5733c6fd2807SJeff Garzik */ 5734c6fd2807SJeff Garzik } 5735c6fd2807SJeff Garzik 5736c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5737c6fd2807SJeff Garzik struct ata_eh_info *ehi = &ap->eh_info; 5738c6fd2807SJeff Garzik unsigned long flags; 5739c6fd2807SJeff Garzik 5740c6fd2807SJeff Garzik ata_port_probe(ap); 5741c6fd2807SJeff Garzik 5742c6fd2807SJeff Garzik /* kick EH for boot probing */ 5743c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5744c6fd2807SJeff Garzik 5745c6fd2807SJeff Garzik ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; 5746c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 5747c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 5748c6fd2807SJeff Garzik 5749c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 5750c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5751c6fd2807SJeff Garzik 5752c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5753c6fd2807SJeff Garzik 5754c6fd2807SJeff Garzik /* wait for EH to finish */ 5755c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5756c6fd2807SJeff Garzik } else { 5757c6fd2807SJeff Garzik DPRINTK("ata%u: bus probe begin\n", ap->id); 5758c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 5759c6fd2807SJeff Garzik DPRINTK("ata%u: bus probe end\n", ap->id); 5760c6fd2807SJeff Garzik 5761c6fd2807SJeff Garzik if (rc) { 5762c6fd2807SJeff Garzik /* FIXME: do something useful here? 5763c6fd2807SJeff Garzik * Current libata behavior will 5764c6fd2807SJeff Garzik * tear down everything when 5765c6fd2807SJeff Garzik * the module is removed 5766c6fd2807SJeff Garzik * or the h/w is unplugged. 5767c6fd2807SJeff Garzik */ 5768c6fd2807SJeff Garzik } 5769c6fd2807SJeff Garzik } 5770c6fd2807SJeff Garzik } 5771c6fd2807SJeff Garzik 5772c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 5773c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 5774cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5775cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5776c6fd2807SJeff Garzik 5777c6fd2807SJeff Garzik ata_scsi_scan_host(ap); 5778c6fd2807SJeff Garzik } 5779c6fd2807SJeff Garzik 5780cca3974eSJeff Garzik dev_set_drvdata(dev, host); 5781c6fd2807SJeff Garzik 5782c6fd2807SJeff Garzik VPRINTK("EXIT, returning %u\n", ent->n_ports); 5783c6fd2807SJeff Garzik return ent->n_ports; /* success */ 5784c6fd2807SJeff Garzik 5785c6fd2807SJeff Garzik err_out_free_irq: 5786cca3974eSJeff Garzik free_irq(ent->irq, host); 5787c6fd2807SJeff Garzik err_out: 5788cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5789cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5790c6fd2807SJeff Garzik if (ap) { 5791c6fd2807SJeff Garzik ap->ops->port_stop(ap); 5792cca3974eSJeff Garzik scsi_host_put(ap->scsi_host); 5793c6fd2807SJeff Garzik } 5794c6fd2807SJeff Garzik } 5795c6fd2807SJeff Garzik 5796cca3974eSJeff Garzik kfree(host); 5797c6fd2807SJeff Garzik VPRINTK("EXIT, returning 0\n"); 5798c6fd2807SJeff Garzik return 0; 5799c6fd2807SJeff Garzik } 5800c6fd2807SJeff Garzik 5801c6fd2807SJeff Garzik /** 5802c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 5803c6fd2807SJeff Garzik * @ap: ATA port to be detached 5804c6fd2807SJeff Garzik * 5805c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 5806c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 5807c6fd2807SJeff Garzik * be quiescent on return from this function. 5808c6fd2807SJeff Garzik * 5809c6fd2807SJeff Garzik * LOCKING: 5810c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5811c6fd2807SJeff Garzik */ 5812c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 5813c6fd2807SJeff Garzik { 5814c6fd2807SJeff Garzik unsigned long flags; 5815c6fd2807SJeff Garzik int i; 5816c6fd2807SJeff Garzik 5817c6fd2807SJeff Garzik if (!ap->ops->error_handler) 5818c6fd2807SJeff Garzik goto skip_eh; 5819c6fd2807SJeff Garzik 5820c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 5821c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5822c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 5823c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5824c6fd2807SJeff Garzik 5825c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5826c6fd2807SJeff Garzik 5827c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 5828c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 5829c6fd2807SJeff Garzik */ 5830c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5831c6fd2807SJeff Garzik 5832c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 5833c6fd2807SJeff Garzik ata_dev_disable(&ap->device[i]); 5834c6fd2807SJeff Garzik 5835c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5836c6fd2807SJeff Garzik 5837c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 5838c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 5839c6fd2807SJeff Garzik * target. 5840c6fd2807SJeff Garzik */ 5841c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5842c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 5843c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5844c6fd2807SJeff Garzik 5845c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5846c6fd2807SJeff Garzik 5847c6fd2807SJeff Garzik /* Flush hotplug task. The sequence is similar to 5848c6fd2807SJeff Garzik * ata_port_flush_task(). 5849c6fd2807SJeff Garzik */ 5850c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5851c6fd2807SJeff Garzik cancel_delayed_work(&ap->hotplug_task); 5852c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5853c6fd2807SJeff Garzik 5854c6fd2807SJeff Garzik skip_eh: 5855c6fd2807SJeff Garzik /* remove the associated SCSI host */ 5856cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 5857c6fd2807SJeff Garzik } 5858c6fd2807SJeff Garzik 5859c6fd2807SJeff Garzik /** 5860cca3974eSJeff Garzik * ata_host_remove - PCI layer callback for device removal 5861cca3974eSJeff Garzik * @host: ATA host set that was removed 5862c6fd2807SJeff Garzik * 5863c6fd2807SJeff Garzik * Unregister all objects associated with this host set. Free those 5864c6fd2807SJeff Garzik * objects. 5865c6fd2807SJeff Garzik * 5866c6fd2807SJeff Garzik * LOCKING: 5867c6fd2807SJeff Garzik * Inherited from calling layer (may sleep). 5868c6fd2807SJeff Garzik */ 5869c6fd2807SJeff Garzik 5870cca3974eSJeff Garzik void ata_host_remove(struct ata_host *host) 5871c6fd2807SJeff Garzik { 5872c6fd2807SJeff Garzik unsigned int i; 5873c6fd2807SJeff Garzik 5874cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) 5875cca3974eSJeff Garzik ata_port_detach(host->ports[i]); 5876c6fd2807SJeff Garzik 5877cca3974eSJeff Garzik free_irq(host->irq, host); 5878cca3974eSJeff Garzik if (host->irq2) 5879cca3974eSJeff Garzik free_irq(host->irq2, host); 5880c6fd2807SJeff Garzik 5881cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5882cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5883c6fd2807SJeff Garzik 5884cca3974eSJeff Garzik ata_scsi_release(ap->scsi_host); 5885c6fd2807SJeff Garzik 5886c6fd2807SJeff Garzik if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { 5887c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 5888c6fd2807SJeff Garzik 5889c6fd2807SJeff Garzik /* FIXME: Add -ac IDE pci mods to remove these special cases */ 5890c6fd2807SJeff Garzik if (ioaddr->cmd_addr == ATA_PRIMARY_CMD) 5891c6fd2807SJeff Garzik release_region(ATA_PRIMARY_CMD, 8); 5892c6fd2807SJeff Garzik else if (ioaddr->cmd_addr == ATA_SECONDARY_CMD) 5893c6fd2807SJeff Garzik release_region(ATA_SECONDARY_CMD, 8); 5894c6fd2807SJeff Garzik } 5895c6fd2807SJeff Garzik 5896cca3974eSJeff Garzik scsi_host_put(ap->scsi_host); 5897c6fd2807SJeff Garzik } 5898c6fd2807SJeff Garzik 5899cca3974eSJeff Garzik if (host->ops->host_stop) 5900cca3974eSJeff Garzik host->ops->host_stop(host); 5901c6fd2807SJeff Garzik 5902cca3974eSJeff Garzik kfree(host); 5903c6fd2807SJeff Garzik } 5904c6fd2807SJeff Garzik 5905c6fd2807SJeff Garzik /** 5906c6fd2807SJeff Garzik * ata_scsi_release - SCSI layer callback hook for host unload 59074f931374SJeff Garzik * @shost: libata host to be unloaded 5908c6fd2807SJeff Garzik * 5909c6fd2807SJeff Garzik * Performs all duties necessary to shut down a libata port... 5910c6fd2807SJeff Garzik * Kill port kthread, disable port, and release resources. 5911c6fd2807SJeff Garzik * 5912c6fd2807SJeff Garzik * LOCKING: 5913c6fd2807SJeff Garzik * Inherited from SCSI layer. 5914c6fd2807SJeff Garzik * 5915c6fd2807SJeff Garzik * RETURNS: 5916c6fd2807SJeff Garzik * One. 5917c6fd2807SJeff Garzik */ 5918c6fd2807SJeff Garzik 5919cca3974eSJeff Garzik int ata_scsi_release(struct Scsi_Host *shost) 5920c6fd2807SJeff Garzik { 5921cca3974eSJeff Garzik struct ata_port *ap = ata_shost_to_port(shost); 5922c6fd2807SJeff Garzik 5923c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 5924c6fd2807SJeff Garzik 5925c6fd2807SJeff Garzik ap->ops->port_disable(ap); 5926c6fd2807SJeff Garzik ap->ops->port_stop(ap); 5927c6fd2807SJeff Garzik 5928c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 5929c6fd2807SJeff Garzik return 1; 5930c6fd2807SJeff Garzik } 5931c6fd2807SJeff Garzik 5932c6fd2807SJeff Garzik struct ata_probe_ent * 5933c6fd2807SJeff Garzik ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) 5934c6fd2807SJeff Garzik { 5935c6fd2807SJeff Garzik struct ata_probe_ent *probe_ent; 5936c6fd2807SJeff Garzik 5937c6fd2807SJeff Garzik probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL); 5938c6fd2807SJeff Garzik if (!probe_ent) { 5939c6fd2807SJeff Garzik printk(KERN_ERR DRV_NAME "(%s): out of memory\n", 5940c6fd2807SJeff Garzik kobject_name(&(dev->kobj))); 5941c6fd2807SJeff Garzik return NULL; 5942c6fd2807SJeff Garzik } 5943c6fd2807SJeff Garzik 5944c6fd2807SJeff Garzik INIT_LIST_HEAD(&probe_ent->node); 5945c6fd2807SJeff Garzik probe_ent->dev = dev; 5946c6fd2807SJeff Garzik 5947c6fd2807SJeff Garzik probe_ent->sht = port->sht; 5948cca3974eSJeff Garzik probe_ent->port_flags = port->flags; 5949c6fd2807SJeff Garzik probe_ent->pio_mask = port->pio_mask; 5950c6fd2807SJeff Garzik probe_ent->mwdma_mask = port->mwdma_mask; 5951c6fd2807SJeff Garzik probe_ent->udma_mask = port->udma_mask; 5952c6fd2807SJeff Garzik probe_ent->port_ops = port->port_ops; 5953d639ca94SJeff Garzik probe_ent->private_data = port->private_data; 5954c6fd2807SJeff Garzik 5955c6fd2807SJeff Garzik return probe_ent; 5956c6fd2807SJeff Garzik } 5957c6fd2807SJeff Garzik 5958c6fd2807SJeff Garzik /** 5959c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 5960c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 5961c6fd2807SJeff Garzik * 5962c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 5963c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 5964c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 5965c6fd2807SJeff Garzik * relative to cmd_addr. 5966c6fd2807SJeff Garzik * 5967c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 5968c6fd2807SJeff Garzik */ 5969c6fd2807SJeff Garzik 5970c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 5971c6fd2807SJeff Garzik { 5972c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 5973c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 5974c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 5975c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 5976c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 5977c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 5978c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 5979c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 5980c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 5981c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 5982c6fd2807SJeff Garzik } 5983c6fd2807SJeff Garzik 5984c6fd2807SJeff Garzik 5985c6fd2807SJeff Garzik #ifdef CONFIG_PCI 5986c6fd2807SJeff Garzik 5987cca3974eSJeff Garzik void ata_pci_host_stop (struct ata_host *host) 5988c6fd2807SJeff Garzik { 5989cca3974eSJeff Garzik struct pci_dev *pdev = to_pci_dev(host->dev); 5990c6fd2807SJeff Garzik 5991cca3974eSJeff Garzik pci_iounmap(pdev, host->mmio_base); 5992c6fd2807SJeff Garzik } 5993c6fd2807SJeff Garzik 5994c6fd2807SJeff Garzik /** 5995c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 5996c6fd2807SJeff Garzik * @pdev: PCI device that was removed 5997c6fd2807SJeff Garzik * 5998c6fd2807SJeff Garzik * PCI layer indicates to libata via this hook that 5999c6fd2807SJeff Garzik * hot-unplug or module unload event has occurred. 6000c6fd2807SJeff Garzik * Handle this by unregistering all objects associated 6001c6fd2807SJeff Garzik * with this PCI device. Free those objects. Then finally 6002c6fd2807SJeff Garzik * release PCI resources and disable device. 6003c6fd2807SJeff Garzik * 6004c6fd2807SJeff Garzik * LOCKING: 6005c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6006c6fd2807SJeff Garzik */ 6007c6fd2807SJeff Garzik 6008c6fd2807SJeff Garzik void ata_pci_remove_one (struct pci_dev *pdev) 6009c6fd2807SJeff Garzik { 6010c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 6011cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 6012c6fd2807SJeff Garzik 6013cca3974eSJeff Garzik ata_host_remove(host); 6014c6fd2807SJeff Garzik 6015c6fd2807SJeff Garzik pci_release_regions(pdev); 6016c6fd2807SJeff Garzik pci_disable_device(pdev); 6017c6fd2807SJeff Garzik dev_set_drvdata(dev, NULL); 6018c6fd2807SJeff Garzik } 6019c6fd2807SJeff Garzik 6020c6fd2807SJeff Garzik /* move to PCI subsystem */ 6021c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6022c6fd2807SJeff Garzik { 6023c6fd2807SJeff Garzik unsigned long tmp = 0; 6024c6fd2807SJeff Garzik 6025c6fd2807SJeff Garzik switch (bits->width) { 6026c6fd2807SJeff Garzik case 1: { 6027c6fd2807SJeff Garzik u8 tmp8 = 0; 6028c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 6029c6fd2807SJeff Garzik tmp = tmp8; 6030c6fd2807SJeff Garzik break; 6031c6fd2807SJeff Garzik } 6032c6fd2807SJeff Garzik case 2: { 6033c6fd2807SJeff Garzik u16 tmp16 = 0; 6034c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6035c6fd2807SJeff Garzik tmp = tmp16; 6036c6fd2807SJeff Garzik break; 6037c6fd2807SJeff Garzik } 6038c6fd2807SJeff Garzik case 4: { 6039c6fd2807SJeff Garzik u32 tmp32 = 0; 6040c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6041c6fd2807SJeff Garzik tmp = tmp32; 6042c6fd2807SJeff Garzik break; 6043c6fd2807SJeff Garzik } 6044c6fd2807SJeff Garzik 6045c6fd2807SJeff Garzik default: 6046c6fd2807SJeff Garzik return -EINVAL; 6047c6fd2807SJeff Garzik } 6048c6fd2807SJeff Garzik 6049c6fd2807SJeff Garzik tmp &= bits->mask; 6050c6fd2807SJeff Garzik 6051c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6052c6fd2807SJeff Garzik } 6053c6fd2807SJeff Garzik 6054c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6055c6fd2807SJeff Garzik { 6056c6fd2807SJeff Garzik pci_save_state(pdev); 6057c6fd2807SJeff Garzik 6058c6fd2807SJeff Garzik if (mesg.event == PM_EVENT_SUSPEND) { 6059c6fd2807SJeff Garzik pci_disable_device(pdev); 6060c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6061c6fd2807SJeff Garzik } 6062c6fd2807SJeff Garzik } 6063c6fd2807SJeff Garzik 6064c6fd2807SJeff Garzik void ata_pci_device_do_resume(struct pci_dev *pdev) 6065c6fd2807SJeff Garzik { 6066c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6067c6fd2807SJeff Garzik pci_restore_state(pdev); 6068c6fd2807SJeff Garzik pci_enable_device(pdev); 6069c6fd2807SJeff Garzik pci_set_master(pdev); 6070c6fd2807SJeff Garzik } 6071c6fd2807SJeff Garzik 6072c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6073c6fd2807SJeff Garzik { 6074cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6075c6fd2807SJeff Garzik int rc = 0; 6076c6fd2807SJeff Garzik 6077cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6078c6fd2807SJeff Garzik if (rc) 6079c6fd2807SJeff Garzik return rc; 6080c6fd2807SJeff Garzik 6081c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6082c6fd2807SJeff Garzik 6083c6fd2807SJeff Garzik return 0; 6084c6fd2807SJeff Garzik } 6085c6fd2807SJeff Garzik 6086c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6087c6fd2807SJeff Garzik { 6088cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6089c6fd2807SJeff Garzik 6090c6fd2807SJeff Garzik ata_pci_device_do_resume(pdev); 6091cca3974eSJeff Garzik ata_host_resume(host); 6092c6fd2807SJeff Garzik return 0; 6093c6fd2807SJeff Garzik } 6094c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6095c6fd2807SJeff Garzik 6096c6fd2807SJeff Garzik 6097c6fd2807SJeff Garzik static int __init ata_init(void) 6098c6fd2807SJeff Garzik { 6099c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 6100c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6101c6fd2807SJeff Garzik if (!ata_wq) 6102c6fd2807SJeff Garzik return -ENOMEM; 6103c6fd2807SJeff Garzik 6104c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 6105c6fd2807SJeff Garzik if (!ata_aux_wq) { 6106c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6107c6fd2807SJeff Garzik return -ENOMEM; 6108c6fd2807SJeff Garzik } 6109c6fd2807SJeff Garzik 6110c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6111c6fd2807SJeff Garzik return 0; 6112c6fd2807SJeff Garzik } 6113c6fd2807SJeff Garzik 6114c6fd2807SJeff Garzik static void __exit ata_exit(void) 6115c6fd2807SJeff Garzik { 6116c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6117c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6118c6fd2807SJeff Garzik } 6119c6fd2807SJeff Garzik 6120a4625085SBrian King subsys_initcall(ata_init); 6121c6fd2807SJeff Garzik module_exit(ata_exit); 6122c6fd2807SJeff Garzik 6123c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6124c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6125c6fd2807SJeff Garzik 6126c6fd2807SJeff Garzik int ata_ratelimit(void) 6127c6fd2807SJeff Garzik { 6128c6fd2807SJeff Garzik int rc; 6129c6fd2807SJeff Garzik unsigned long flags; 6130c6fd2807SJeff Garzik 6131c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6132c6fd2807SJeff Garzik 6133c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6134c6fd2807SJeff Garzik rc = 1; 6135c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6136c6fd2807SJeff Garzik } else 6137c6fd2807SJeff Garzik rc = 0; 6138c6fd2807SJeff Garzik 6139c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6140c6fd2807SJeff Garzik 6141c6fd2807SJeff Garzik return rc; 6142c6fd2807SJeff Garzik } 6143c6fd2807SJeff Garzik 6144c6fd2807SJeff Garzik /** 6145c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6146c6fd2807SJeff Garzik * @reg: IO-mapped register 6147c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6148c6fd2807SJeff Garzik * @val: Wait condition 6149c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 6150c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 6151c6fd2807SJeff Garzik * 6152c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6153c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6154c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6155c6fd2807SJeff Garzik * 6156c6fd2807SJeff Garzik * (*@reg & mask) != val 6157c6fd2807SJeff Garzik * 6158c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6159c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6160c6fd2807SJeff Garzik * 6161c6fd2807SJeff Garzik * LOCKING: 6162c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6163c6fd2807SJeff Garzik * 6164c6fd2807SJeff Garzik * RETURNS: 6165c6fd2807SJeff Garzik * The final register value. 6166c6fd2807SJeff Garzik */ 6167c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6168c6fd2807SJeff Garzik unsigned long interval_msec, 6169c6fd2807SJeff Garzik unsigned long timeout_msec) 6170c6fd2807SJeff Garzik { 6171c6fd2807SJeff Garzik unsigned long timeout; 6172c6fd2807SJeff Garzik u32 tmp; 6173c6fd2807SJeff Garzik 6174c6fd2807SJeff Garzik tmp = ioread32(reg); 6175c6fd2807SJeff Garzik 6176c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6177c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6178c6fd2807SJeff Garzik * eat away the timeout. 6179c6fd2807SJeff Garzik */ 6180c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 6181c6fd2807SJeff Garzik 6182c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 6183c6fd2807SJeff Garzik msleep(interval_msec); 6184c6fd2807SJeff Garzik tmp = ioread32(reg); 6185c6fd2807SJeff Garzik } 6186c6fd2807SJeff Garzik 6187c6fd2807SJeff Garzik return tmp; 6188c6fd2807SJeff Garzik } 6189c6fd2807SJeff Garzik 6190c6fd2807SJeff Garzik /* 6191c6fd2807SJeff Garzik * Dummy port_ops 6192c6fd2807SJeff Garzik */ 6193c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 6194c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 6195c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 6196c6fd2807SJeff Garzik 6197c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 6198c6fd2807SJeff Garzik { 6199c6fd2807SJeff Garzik return ATA_DRDY; 6200c6fd2807SJeff Garzik } 6201c6fd2807SJeff Garzik 6202c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6203c6fd2807SJeff Garzik { 6204c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6205c6fd2807SJeff Garzik } 6206c6fd2807SJeff Garzik 6207c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 6208c6fd2807SJeff Garzik .port_disable = ata_port_disable, 6209c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 6210c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 6211c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 6212c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6213c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6214c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 6215c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 6216c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 6217c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 6218c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 6219c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 6220c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 6221c6fd2807SJeff Garzik }; 6222c6fd2807SJeff Garzik 6223c6fd2807SJeff Garzik /* 6224c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6225c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6226c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6227c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6228c6fd2807SJeff Garzik */ 6229c6fd2807SJeff Garzik 6230c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6231c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6232c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6233c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6234c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6235c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 6236cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6237c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_device_add); 6238c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_detach); 6239cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_remove); 6240c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6241c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 6242c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 6243c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6244c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6245c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 6246c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 6247c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 6248c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 6249c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 6250c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6251c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6252c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 6253c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 6254c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 6255c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 6256c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_stop); 6257c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_stop); 6258c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 6259c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_mmio_data_xfer); 6260c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_data_xfer); 6261c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq); 6262c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 6263c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6264c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 6265c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 6266c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 6267c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 6268c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 6269c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 6270c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 6271c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 6272c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 6273c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 6274c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 6275c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6276c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_debounce); 6277c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_resume); 6278c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 6279c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 6280c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 6281c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 6282c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 6283b6103f6dSTejun Heo EXPORT_SYMBOL_GPL(sata_port_hardreset); 6284c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 6285c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 6286c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6287c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6288c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6289c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6290c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6291c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 6292c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 6293c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6294c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6295c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6296c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6297c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6298c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_release); 6299c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 6300c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6301c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6302c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6303c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6304c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_online); 6305c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_offline); 6306cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6307cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 6308c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6309c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 63106919a0a6SAlan Cox EXPORT_SYMBOL_GPL(ata_device_blacklisted); 6311c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6312c6fd2807SJeff Garzik 6313c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6314c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6315c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6316c6fd2807SJeff Garzik 6317c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6318c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6319c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_host_stop); 6320c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); 6321c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 6322c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6323c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6324c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6325c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6326c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6327c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 6328c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 6329c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6330c6fd2807SJeff Garzik 6331c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); 6332c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_resume); 6333c6fd2807SJeff Garzik 6334c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 6335c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6336c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6337c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 6338c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6339c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6340c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6341c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 6342c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 6343