1 /* 2 * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers 3 * 4 * Copyright 2005 Tejun Heo 5 * 6 * Based on preview driver from Silicon Image. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2, or (at your option) any 11 * later version. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 */ 19 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/gfp.h> 23 #include <linux/pci.h> 24 #include <linux/blkdev.h> 25 #include <linux/delay.h> 26 #include <linux/interrupt.h> 27 #include <linux/dma-mapping.h> 28 #include <linux/device.h> 29 #include <scsi/scsi_host.h> 30 #include <scsi/scsi_cmnd.h> 31 #include <linux/libata.h> 32 33 #define DRV_NAME "sata_sil24" 34 #define DRV_VERSION "1.1" 35 36 /* 37 * Port request block (PRB) 32 bytes 38 */ 39 struct sil24_prb { 40 __le16 ctrl; 41 __le16 prot; 42 __le32 rx_cnt; 43 u8 fis[6 * 4]; 44 }; 45 46 /* 47 * Scatter gather entry (SGE) 16 bytes 48 */ 49 struct sil24_sge { 50 __le64 addr; 51 __le32 cnt; 52 __le32 flags; 53 }; 54 55 56 enum { 57 SIL24_HOST_BAR = 0, 58 SIL24_PORT_BAR = 2, 59 60 /* sil24 fetches in chunks of 64bytes. The first block 61 * contains the PRB and two SGEs. From the second block, it's 62 * consisted of four SGEs and called SGT. Calculate the 63 * number of SGTs that fit into one page. 64 */ 65 SIL24_PRB_SZ = sizeof(struct sil24_prb) 66 + 2 * sizeof(struct sil24_sge), 67 SIL24_MAX_SGT = (PAGE_SIZE - SIL24_PRB_SZ) 68 / (4 * sizeof(struct sil24_sge)), 69 70 /* This will give us one unused SGEs for ATA. This extra SGE 71 * will be used to store CDB for ATAPI devices. 72 */ 73 SIL24_MAX_SGE = 4 * SIL24_MAX_SGT + 1, 74 75 /* 76 * Global controller registers (128 bytes @ BAR0) 77 */ 78 /* 32 bit regs */ 79 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */ 80 HOST_CTRL = 0x40, 81 HOST_IRQ_STAT = 0x44, 82 HOST_PHY_CFG = 0x48, 83 HOST_BIST_CTRL = 0x50, 84 HOST_BIST_PTRN = 0x54, 85 HOST_BIST_STAT = 0x58, 86 HOST_MEM_BIST_STAT = 0x5c, 87 HOST_FLASH_CMD = 0x70, 88 /* 8 bit regs */ 89 HOST_FLASH_DATA = 0x74, 90 HOST_TRANSITION_DETECT = 0x75, 91 HOST_GPIO_CTRL = 0x76, 92 HOST_I2C_ADDR = 0x78, /* 32 bit */ 93 HOST_I2C_DATA = 0x7c, 94 HOST_I2C_XFER_CNT = 0x7e, 95 HOST_I2C_CTRL = 0x7f, 96 97 /* HOST_SLOT_STAT bits */ 98 HOST_SSTAT_ATTN = (1 << 31), 99 100 /* HOST_CTRL bits */ 101 HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */ 102 HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */ 103 HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */ 104 HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */ 105 HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */ 106 HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */ 107 108 /* 109 * Port registers 110 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2) 111 */ 112 PORT_REGS_SIZE = 0x2000, 113 114 PORT_LRAM = 0x0000, /* 31 LRAM slots and PMP regs */ 115 PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */ 116 117 PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */ 118 PORT_PMP_STATUS = 0x0000, /* port device status offset */ 119 PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */ 120 PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */ 121 122 /* 32 bit regs */ 123 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */ 124 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */ 125 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */ 126 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */ 127 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */ 128 PORT_ACTIVATE_UPPER_ADDR= 0x101c, 129 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */ 130 PORT_CMD_ERR = 0x1024, /* command error number */ 131 PORT_FIS_CFG = 0x1028, 132 PORT_FIFO_THRES = 0x102c, 133 /* 16 bit regs */ 134 PORT_DECODE_ERR_CNT = 0x1040, 135 PORT_DECODE_ERR_THRESH = 0x1042, 136 PORT_CRC_ERR_CNT = 0x1044, 137 PORT_CRC_ERR_THRESH = 0x1046, 138 PORT_HSHK_ERR_CNT = 0x1048, 139 PORT_HSHK_ERR_THRESH = 0x104a, 140 /* 32 bit regs */ 141 PORT_PHY_CFG = 0x1050, 142 PORT_SLOT_STAT = 0x1800, 143 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */ 144 PORT_CONTEXT = 0x1e04, 145 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */ 146 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */ 147 PORT_SCONTROL = 0x1f00, 148 PORT_SSTATUS = 0x1f04, 149 PORT_SERROR = 0x1f08, 150 PORT_SACTIVE = 0x1f0c, 151 152 /* PORT_CTRL_STAT bits */ 153 PORT_CS_PORT_RST = (1 << 0), /* port reset */ 154 PORT_CS_DEV_RST = (1 << 1), /* device reset */ 155 PORT_CS_INIT = (1 << 2), /* port initialize */ 156 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */ 157 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */ 158 PORT_CS_PMP_RESUME = (1 << 6), /* PMP resume */ 159 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */ 160 PORT_CS_PMP_EN = (1 << 13), /* port multiplier enable */ 161 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */ 162 163 /* PORT_IRQ_STAT/ENABLE_SET/CLR */ 164 /* bits[11:0] are masked */ 165 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */ 166 PORT_IRQ_ERROR = (1 << 1), /* command execution error */ 167 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */ 168 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */ 169 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */ 170 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */ 171 PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */ 172 PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */ 173 PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */ 174 PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */ 175 PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */ 176 PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */ 177 178 DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | 179 PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG | 180 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_NOTIFY, 181 182 /* bits[27:16] are unmasked (raw) */ 183 PORT_IRQ_RAW_SHIFT = 16, 184 PORT_IRQ_MASKED_MASK = 0x7ff, 185 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT), 186 187 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */ 188 PORT_IRQ_STEER_SHIFT = 30, 189 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT), 190 191 /* PORT_CMD_ERR constants */ 192 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */ 193 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */ 194 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */ 195 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */ 196 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */ 197 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */ 198 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */ 199 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */ 200 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */ 201 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */ 202 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */ 203 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */ 204 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */ 205 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */ 206 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */ 207 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */ 208 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */ 209 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */ 210 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */ 211 PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */ 212 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */ 213 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */ 214 215 /* bits of PRB control field */ 216 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */ 217 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */ 218 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */ 219 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */ 220 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */ 221 222 /* PRB protocol field */ 223 PRB_PROT_PACKET = (1 << 0), 224 PRB_PROT_TCQ = (1 << 1), 225 PRB_PROT_NCQ = (1 << 2), 226 PRB_PROT_READ = (1 << 3), 227 PRB_PROT_WRITE = (1 << 4), 228 PRB_PROT_TRANSPARENT = (1 << 5), 229 230 /* 231 * Other constants 232 */ 233 SGE_TRM = (1 << 31), /* Last SGE in chain */ 234 SGE_LNK = (1 << 30), /* linked list 235 Points to SGT, not SGE */ 236 SGE_DRD = (1 << 29), /* discard data read (/dev/null) 237 data address ignored */ 238 239 SIL24_MAX_CMDS = 31, 240 241 /* board id */ 242 BID_SIL3124 = 0, 243 BID_SIL3132 = 1, 244 BID_SIL3131 = 2, 245 246 /* host flags */ 247 SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | 248 ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA | 249 ATA_FLAG_AN | ATA_FLAG_PMP | ATA_FLAG_LOWTAG, 250 SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */ 251 252 IRQ_STAT_4PORTS = 0xf, 253 }; 254 255 struct sil24_ata_block { 256 struct sil24_prb prb; 257 struct sil24_sge sge[SIL24_MAX_SGE]; 258 }; 259 260 struct sil24_atapi_block { 261 struct sil24_prb prb; 262 u8 cdb[16]; 263 struct sil24_sge sge[SIL24_MAX_SGE]; 264 }; 265 266 union sil24_cmd_block { 267 struct sil24_ata_block ata; 268 struct sil24_atapi_block atapi; 269 }; 270 271 static const struct sil24_cerr_info { 272 unsigned int err_mask, action; 273 const char *desc; 274 } sil24_cerr_db[] = { 275 [0] = { AC_ERR_DEV, 0, 276 "device error" }, 277 [PORT_CERR_DEV] = { AC_ERR_DEV, 0, 278 "device error via D2H FIS" }, 279 [PORT_CERR_SDB] = { AC_ERR_DEV, 0, 280 "device error via SDB FIS" }, 281 [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_RESET, 282 "error in data FIS" }, 283 [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_RESET, 284 "failed to transmit command FIS" }, 285 [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_RESET, 286 "protocol mismatch" }, 287 [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_RESET, 288 "data directon mismatch" }, 289 [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_RESET, 290 "ran out of SGEs while writing" }, 291 [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_RESET, 292 "ran out of SGEs while reading" }, 293 [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_RESET, 294 "invalid data directon for ATAPI CDB" }, 295 [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET, 296 "SGT not on qword boundary" }, 297 [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 298 "PCI target abort while fetching SGT" }, 299 [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 300 "PCI master abort while fetching SGT" }, 301 [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 302 "PCI parity error while fetching SGT" }, 303 [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET, 304 "PRB not on qword boundary" }, 305 [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 306 "PCI target abort while fetching PRB" }, 307 [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 308 "PCI master abort while fetching PRB" }, 309 [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 310 "PCI parity error while fetching PRB" }, 311 [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 312 "undefined error while transferring data" }, 313 [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 314 "PCI target abort while transferring data" }, 315 [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 316 "PCI master abort while transferring data" }, 317 [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 318 "PCI parity error while transferring data" }, 319 [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_RESET, 320 "FIS received while sending service FIS" }, 321 }; 322 323 /* 324 * ap->private_data 325 * 326 * The preview driver always returned 0 for status. We emulate it 327 * here from the previous interrupt. 328 */ 329 struct sil24_port_priv { 330 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */ 331 dma_addr_t cmd_block_dma; /* DMA base addr for them */ 332 int do_port_rst; 333 }; 334 335 static void sil24_dev_config(struct ata_device *dev); 336 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val); 337 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val); 338 static int sil24_qc_defer(struct ata_queued_cmd *qc); 339 static void sil24_qc_prep(struct ata_queued_cmd *qc); 340 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); 341 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc); 342 static void sil24_pmp_attach(struct ata_port *ap); 343 static void sil24_pmp_detach(struct ata_port *ap); 344 static void sil24_freeze(struct ata_port *ap); 345 static void sil24_thaw(struct ata_port *ap); 346 static int sil24_softreset(struct ata_link *link, unsigned int *class, 347 unsigned long deadline); 348 static int sil24_hardreset(struct ata_link *link, unsigned int *class, 349 unsigned long deadline); 350 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, 351 unsigned long deadline); 352 static void sil24_error_handler(struct ata_port *ap); 353 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc); 354 static int sil24_port_start(struct ata_port *ap); 355 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 356 #ifdef CONFIG_PM_SLEEP 357 static int sil24_pci_device_resume(struct pci_dev *pdev); 358 #endif 359 #ifdef CONFIG_PM 360 static int sil24_port_resume(struct ata_port *ap); 361 #endif 362 363 static const struct pci_device_id sil24_pci_tbl[] = { 364 { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 }, 365 { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 }, 366 { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 }, 367 { PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 }, 368 { PCI_VDEVICE(CMD, 0x0244), BID_SIL3132 }, 369 { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 }, 370 { PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 }, 371 372 { } /* terminate list */ 373 }; 374 375 static struct pci_driver sil24_pci_driver = { 376 .name = DRV_NAME, 377 .id_table = sil24_pci_tbl, 378 .probe = sil24_init_one, 379 .remove = ata_pci_remove_one, 380 #ifdef CONFIG_PM_SLEEP 381 .suspend = ata_pci_device_suspend, 382 .resume = sil24_pci_device_resume, 383 #endif 384 }; 385 386 static struct scsi_host_template sil24_sht = { 387 ATA_NCQ_SHT(DRV_NAME), 388 .can_queue = SIL24_MAX_CMDS, 389 .sg_tablesize = SIL24_MAX_SGE, 390 .dma_boundary = ATA_DMA_BOUNDARY, 391 }; 392 393 static struct ata_port_operations sil24_ops = { 394 .inherits = &sata_pmp_port_ops, 395 396 .qc_defer = sil24_qc_defer, 397 .qc_prep = sil24_qc_prep, 398 .qc_issue = sil24_qc_issue, 399 .qc_fill_rtf = sil24_qc_fill_rtf, 400 401 .freeze = sil24_freeze, 402 .thaw = sil24_thaw, 403 .softreset = sil24_softreset, 404 .hardreset = sil24_hardreset, 405 .pmp_softreset = sil24_softreset, 406 .pmp_hardreset = sil24_pmp_hardreset, 407 .error_handler = sil24_error_handler, 408 .post_internal_cmd = sil24_post_internal_cmd, 409 .dev_config = sil24_dev_config, 410 411 .scr_read = sil24_scr_read, 412 .scr_write = sil24_scr_write, 413 .pmp_attach = sil24_pmp_attach, 414 .pmp_detach = sil24_pmp_detach, 415 416 .port_start = sil24_port_start, 417 #ifdef CONFIG_PM 418 .port_resume = sil24_port_resume, 419 #endif 420 }; 421 422 static bool sata_sil24_msi; /* Disable MSI */ 423 module_param_named(msi, sata_sil24_msi, bool, S_IRUGO); 424 MODULE_PARM_DESC(msi, "Enable MSI (Default: false)"); 425 426 /* 427 * Use bits 30-31 of port_flags to encode available port numbers. 428 * Current maxium is 4. 429 */ 430 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30) 431 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1) 432 433 static const struct ata_port_info sil24_port_info[] = { 434 /* sil_3124 */ 435 { 436 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) | 437 SIL24_FLAG_PCIX_IRQ_WOC, 438 .pio_mask = ATA_PIO4, 439 .mwdma_mask = ATA_MWDMA2, 440 .udma_mask = ATA_UDMA5, 441 .port_ops = &sil24_ops, 442 }, 443 /* sil_3132 */ 444 { 445 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2), 446 .pio_mask = ATA_PIO4, 447 .mwdma_mask = ATA_MWDMA2, 448 .udma_mask = ATA_UDMA5, 449 .port_ops = &sil24_ops, 450 }, 451 /* sil_3131/sil_3531 */ 452 { 453 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1), 454 .pio_mask = ATA_PIO4, 455 .mwdma_mask = ATA_MWDMA2, 456 .udma_mask = ATA_UDMA5, 457 .port_ops = &sil24_ops, 458 }, 459 }; 460 461 static int sil24_tag(int tag) 462 { 463 if (unlikely(ata_tag_internal(tag))) 464 return 0; 465 return tag; 466 } 467 468 static unsigned long sil24_port_offset(struct ata_port *ap) 469 { 470 return ap->port_no * PORT_REGS_SIZE; 471 } 472 473 static void __iomem *sil24_port_base(struct ata_port *ap) 474 { 475 return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap); 476 } 477 478 static void sil24_dev_config(struct ata_device *dev) 479 { 480 void __iomem *port = sil24_port_base(dev->link->ap); 481 482 if (dev->cdb_len == 16) 483 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT); 484 else 485 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR); 486 } 487 488 static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf) 489 { 490 void __iomem *port = sil24_port_base(ap); 491 struct sil24_prb __iomem *prb; 492 u8 fis[6 * 4]; 493 494 prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ; 495 memcpy_fromio(fis, prb->fis, sizeof(fis)); 496 ata_tf_from_fis(fis, tf); 497 } 498 499 static int sil24_scr_map[] = { 500 [SCR_CONTROL] = 0, 501 [SCR_STATUS] = 1, 502 [SCR_ERROR] = 2, 503 [SCR_ACTIVE] = 3, 504 }; 505 506 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) 507 { 508 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; 509 510 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 511 *val = readl(scr_addr + sil24_scr_map[sc_reg] * 4); 512 return 0; 513 } 514 return -EINVAL; 515 } 516 517 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) 518 { 519 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; 520 521 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 522 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); 523 return 0; 524 } 525 return -EINVAL; 526 } 527 528 static void sil24_config_port(struct ata_port *ap) 529 { 530 void __iomem *port = sil24_port_base(ap); 531 532 /* configure IRQ WoC */ 533 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 534 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT); 535 else 536 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); 537 538 /* zero error counters. */ 539 writew(0x8000, port + PORT_DECODE_ERR_THRESH); 540 writew(0x8000, port + PORT_CRC_ERR_THRESH); 541 writew(0x8000, port + PORT_HSHK_ERR_THRESH); 542 writew(0x0000, port + PORT_DECODE_ERR_CNT); 543 writew(0x0000, port + PORT_CRC_ERR_CNT); 544 writew(0x0000, port + PORT_HSHK_ERR_CNT); 545 546 /* always use 64bit activation */ 547 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR); 548 549 /* clear port multiplier enable and resume bits */ 550 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 551 } 552 553 static void sil24_config_pmp(struct ata_port *ap, int attached) 554 { 555 void __iomem *port = sil24_port_base(ap); 556 557 if (attached) 558 writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT); 559 else 560 writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR); 561 } 562 563 static void sil24_clear_pmp(struct ata_port *ap) 564 { 565 void __iomem *port = sil24_port_base(ap); 566 int i; 567 568 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 569 570 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { 571 void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE; 572 573 writel(0, pmp_base + PORT_PMP_STATUS); 574 writel(0, pmp_base + PORT_PMP_QACTIVE); 575 } 576 } 577 578 static int sil24_init_port(struct ata_port *ap) 579 { 580 void __iomem *port = sil24_port_base(ap); 581 struct sil24_port_priv *pp = ap->private_data; 582 u32 tmp; 583 584 /* clear PMP error status */ 585 if (sata_pmp_attached(ap)) 586 sil24_clear_pmp(ap); 587 588 writel(PORT_CS_INIT, port + PORT_CTRL_STAT); 589 ata_wait_register(ap, port + PORT_CTRL_STAT, 590 PORT_CS_INIT, PORT_CS_INIT, 10, 100); 591 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 592 PORT_CS_RDY, 0, 10, 100); 593 594 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) { 595 pp->do_port_rst = 1; 596 ap->link.eh_context.i.action |= ATA_EH_RESET; 597 return -EIO; 598 } 599 600 return 0; 601 } 602 603 static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp, 604 const struct ata_taskfile *tf, 605 int is_cmd, u32 ctrl, 606 unsigned long timeout_msec) 607 { 608 void __iomem *port = sil24_port_base(ap); 609 struct sil24_port_priv *pp = ap->private_data; 610 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb; 611 dma_addr_t paddr = pp->cmd_block_dma; 612 u32 irq_enabled, irq_mask, irq_stat; 613 int rc; 614 615 prb->ctrl = cpu_to_le16(ctrl); 616 ata_tf_to_fis(tf, pmp, is_cmd, prb->fis); 617 618 /* temporarily plug completion and error interrupts */ 619 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET); 620 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR); 621 622 /* 623 * The barrier is required to ensure that writes to cmd_block reach 624 * the memory before the write to PORT_CMD_ACTIVATE. 625 */ 626 wmb(); 627 writel((u32)paddr, port + PORT_CMD_ACTIVATE); 628 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); 629 630 irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT; 631 irq_stat = ata_wait_register(ap, port + PORT_IRQ_STAT, irq_mask, 0x0, 632 10, timeout_msec); 633 634 writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */ 635 irq_stat >>= PORT_IRQ_RAW_SHIFT; 636 637 if (irq_stat & PORT_IRQ_COMPLETE) 638 rc = 0; 639 else { 640 /* force port into known state */ 641 sil24_init_port(ap); 642 643 if (irq_stat & PORT_IRQ_ERROR) 644 rc = -EIO; 645 else 646 rc = -EBUSY; 647 } 648 649 /* restore IRQ enabled */ 650 writel(irq_enabled, port + PORT_IRQ_ENABLE_SET); 651 652 return rc; 653 } 654 655 static int sil24_softreset(struct ata_link *link, unsigned int *class, 656 unsigned long deadline) 657 { 658 struct ata_port *ap = link->ap; 659 int pmp = sata_srst_pmp(link); 660 unsigned long timeout_msec = 0; 661 struct ata_taskfile tf; 662 const char *reason; 663 int rc; 664 665 DPRINTK("ENTER\n"); 666 667 /* put the port into known state */ 668 if (sil24_init_port(ap)) { 669 reason = "port not ready"; 670 goto err; 671 } 672 673 /* do SRST */ 674 if (time_after(deadline, jiffies)) 675 timeout_msec = jiffies_to_msecs(deadline - jiffies); 676 677 ata_tf_init(link->device, &tf); /* doesn't really matter */ 678 rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST, 679 timeout_msec); 680 if (rc == -EBUSY) { 681 reason = "timeout"; 682 goto err; 683 } else if (rc) { 684 reason = "SRST command error"; 685 goto err; 686 } 687 688 sil24_read_tf(ap, 0, &tf); 689 *class = ata_dev_classify(&tf); 690 691 DPRINTK("EXIT, class=%u\n", *class); 692 return 0; 693 694 err: 695 ata_link_err(link, "softreset failed (%s)\n", reason); 696 return -EIO; 697 } 698 699 static int sil24_hardreset(struct ata_link *link, unsigned int *class, 700 unsigned long deadline) 701 { 702 struct ata_port *ap = link->ap; 703 void __iomem *port = sil24_port_base(ap); 704 struct sil24_port_priv *pp = ap->private_data; 705 int did_port_rst = 0; 706 const char *reason; 707 int tout_msec, rc; 708 u32 tmp; 709 710 retry: 711 /* Sometimes, DEV_RST is not enough to recover the controller. 712 * This happens often after PM DMA CS errata. 713 */ 714 if (pp->do_port_rst) { 715 ata_port_warn(ap, 716 "controller in dubious state, performing PORT_RST\n"); 717 718 writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT); 719 ata_msleep(ap, 10); 720 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 721 ata_wait_register(ap, port + PORT_CTRL_STAT, PORT_CS_RDY, 0, 722 10, 5000); 723 724 /* restore port configuration */ 725 sil24_config_port(ap); 726 sil24_config_pmp(ap, ap->nr_pmp_links); 727 728 pp->do_port_rst = 0; 729 did_port_rst = 1; 730 } 731 732 /* sil24 does the right thing(tm) without any protection */ 733 sata_set_spd(link); 734 735 tout_msec = 100; 736 if (ata_link_online(link)) 737 tout_msec = 5000; 738 739 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); 740 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 741 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10, 742 tout_msec); 743 744 /* SStatus oscillates between zero and valid status after 745 * DEV_RST, debounce it. 746 */ 747 rc = sata_link_debounce(link, sata_deb_timing_long, deadline); 748 if (rc) { 749 reason = "PHY debouncing failed"; 750 goto err; 751 } 752 753 if (tmp & PORT_CS_DEV_RST) { 754 if (ata_link_offline(link)) 755 return 0; 756 reason = "link not ready"; 757 goto err; 758 } 759 760 /* Sil24 doesn't store signature FIS after hardreset, so we 761 * can't wait for BSY to clear. Some devices take a long time 762 * to get ready and those devices will choke if we don't wait 763 * for BSY clearance here. Tell libata to perform follow-up 764 * softreset. 765 */ 766 return -EAGAIN; 767 768 err: 769 if (!did_port_rst) { 770 pp->do_port_rst = 1; 771 goto retry; 772 } 773 774 ata_link_err(link, "hardreset failed (%s)\n", reason); 775 return -EIO; 776 } 777 778 static inline void sil24_fill_sg(struct ata_queued_cmd *qc, 779 struct sil24_sge *sge) 780 { 781 struct scatterlist *sg; 782 struct sil24_sge *last_sge = NULL; 783 unsigned int si; 784 785 for_each_sg(qc->sg, sg, qc->n_elem, si) { 786 sge->addr = cpu_to_le64(sg_dma_address(sg)); 787 sge->cnt = cpu_to_le32(sg_dma_len(sg)); 788 sge->flags = 0; 789 790 last_sge = sge; 791 sge++; 792 } 793 794 last_sge->flags = cpu_to_le32(SGE_TRM); 795 } 796 797 static int sil24_qc_defer(struct ata_queued_cmd *qc) 798 { 799 struct ata_link *link = qc->dev->link; 800 struct ata_port *ap = link->ap; 801 u8 prot = qc->tf.protocol; 802 803 /* 804 * There is a bug in the chip: 805 * Port LRAM Causes the PRB/SGT Data to be Corrupted 806 * If the host issues a read request for LRAM and SActive registers 807 * while active commands are available in the port, PRB/SGT data in 808 * the LRAM can become corrupted. This issue applies only when 809 * reading from, but not writing to, the LRAM. 810 * 811 * Therefore, reading LRAM when there is no particular error [and 812 * other commands may be outstanding] is prohibited. 813 * 814 * To avoid this bug there are two situations where a command must run 815 * exclusive of any other commands on the port: 816 * 817 * - ATAPI commands which check the sense data 818 * - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF 819 * set. 820 * 821 */ 822 int is_excl = (ata_is_atapi(prot) || 823 (qc->flags & ATA_QCFLAG_RESULT_TF)); 824 825 if (unlikely(ap->excl_link)) { 826 if (link == ap->excl_link) { 827 if (ap->nr_active_links) 828 return ATA_DEFER_PORT; 829 qc->flags |= ATA_QCFLAG_CLEAR_EXCL; 830 } else 831 return ATA_DEFER_PORT; 832 } else if (unlikely(is_excl)) { 833 ap->excl_link = link; 834 if (ap->nr_active_links) 835 return ATA_DEFER_PORT; 836 qc->flags |= ATA_QCFLAG_CLEAR_EXCL; 837 } 838 839 return ata_std_qc_defer(qc); 840 } 841 842 static void sil24_qc_prep(struct ata_queued_cmd *qc) 843 { 844 struct ata_port *ap = qc->ap; 845 struct sil24_port_priv *pp = ap->private_data; 846 union sil24_cmd_block *cb; 847 struct sil24_prb *prb; 848 struct sil24_sge *sge; 849 u16 ctrl = 0; 850 851 cb = &pp->cmd_block[sil24_tag(qc->tag)]; 852 853 if (!ata_is_atapi(qc->tf.protocol)) { 854 prb = &cb->ata.prb; 855 sge = cb->ata.sge; 856 if (ata_is_data(qc->tf.protocol)) { 857 u16 prot = 0; 858 ctrl = PRB_CTRL_PROTOCOL; 859 if (ata_is_ncq(qc->tf.protocol)) 860 prot |= PRB_PROT_NCQ; 861 if (qc->tf.flags & ATA_TFLAG_WRITE) 862 prot |= PRB_PROT_WRITE; 863 else 864 prot |= PRB_PROT_READ; 865 prb->prot = cpu_to_le16(prot); 866 } 867 } else { 868 prb = &cb->atapi.prb; 869 sge = cb->atapi.sge; 870 memset(cb->atapi.cdb, 0, sizeof(cb->atapi.cdb)); 871 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len); 872 873 if (ata_is_data(qc->tf.protocol)) { 874 if (qc->tf.flags & ATA_TFLAG_WRITE) 875 ctrl = PRB_CTRL_PACKET_WRITE; 876 else 877 ctrl = PRB_CTRL_PACKET_READ; 878 } 879 } 880 881 prb->ctrl = cpu_to_le16(ctrl); 882 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis); 883 884 if (qc->flags & ATA_QCFLAG_DMAMAP) 885 sil24_fill_sg(qc, sge); 886 } 887 888 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc) 889 { 890 struct ata_port *ap = qc->ap; 891 struct sil24_port_priv *pp = ap->private_data; 892 void __iomem *port = sil24_port_base(ap); 893 unsigned int tag = sil24_tag(qc->tag); 894 dma_addr_t paddr; 895 void __iomem *activate; 896 897 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block); 898 activate = port + PORT_CMD_ACTIVATE + tag * 8; 899 900 /* 901 * The barrier is required to ensure that writes to cmd_block reach 902 * the memory before the write to PORT_CMD_ACTIVATE. 903 */ 904 wmb(); 905 writel((u32)paddr, activate); 906 writel((u64)paddr >> 32, activate + 4); 907 908 return 0; 909 } 910 911 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc) 912 { 913 sil24_read_tf(qc->ap, qc->tag, &qc->result_tf); 914 return true; 915 } 916 917 static void sil24_pmp_attach(struct ata_port *ap) 918 { 919 u32 *gscr = ap->link.device->gscr; 920 921 sil24_config_pmp(ap, 1); 922 sil24_init_port(ap); 923 924 if (sata_pmp_gscr_vendor(gscr) == 0x11ab && 925 sata_pmp_gscr_devid(gscr) == 0x4140) { 926 ata_port_info(ap, 927 "disabling NCQ support due to sil24-mv4140 quirk\n"); 928 ap->flags &= ~ATA_FLAG_NCQ; 929 } 930 } 931 932 static void sil24_pmp_detach(struct ata_port *ap) 933 { 934 sil24_init_port(ap); 935 sil24_config_pmp(ap, 0); 936 937 ap->flags |= ATA_FLAG_NCQ; 938 } 939 940 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, 941 unsigned long deadline) 942 { 943 int rc; 944 945 rc = sil24_init_port(link->ap); 946 if (rc) { 947 ata_link_err(link, "hardreset failed (port not ready)\n"); 948 return rc; 949 } 950 951 return sata_std_hardreset(link, class, deadline); 952 } 953 954 static void sil24_freeze(struct ata_port *ap) 955 { 956 void __iomem *port = sil24_port_base(ap); 957 958 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear 959 * PORT_IRQ_ENABLE instead. 960 */ 961 writel(0xffff, port + PORT_IRQ_ENABLE_CLR); 962 } 963 964 static void sil24_thaw(struct ata_port *ap) 965 { 966 void __iomem *port = sil24_port_base(ap); 967 u32 tmp; 968 969 /* clear IRQ */ 970 tmp = readl(port + PORT_IRQ_STAT); 971 writel(tmp, port + PORT_IRQ_STAT); 972 973 /* turn IRQ back on */ 974 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET); 975 } 976 977 static void sil24_error_intr(struct ata_port *ap) 978 { 979 void __iomem *port = sil24_port_base(ap); 980 struct sil24_port_priv *pp = ap->private_data; 981 struct ata_queued_cmd *qc = NULL; 982 struct ata_link *link; 983 struct ata_eh_info *ehi; 984 int abort = 0, freeze = 0; 985 u32 irq_stat; 986 987 /* on error, we need to clear IRQ explicitly */ 988 irq_stat = readl(port + PORT_IRQ_STAT); 989 writel(irq_stat, port + PORT_IRQ_STAT); 990 991 /* first, analyze and record host port events */ 992 link = &ap->link; 993 ehi = &link->eh_info; 994 ata_ehi_clear_desc(ehi); 995 996 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); 997 998 if (irq_stat & PORT_IRQ_SDB_NOTIFY) { 999 ata_ehi_push_desc(ehi, "SDB notify"); 1000 sata_async_notification(ap); 1001 } 1002 1003 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) { 1004 ata_ehi_hotplugged(ehi); 1005 ata_ehi_push_desc(ehi, "%s", 1006 irq_stat & PORT_IRQ_PHYRDY_CHG ? 1007 "PHY RDY changed" : "device exchanged"); 1008 freeze = 1; 1009 } 1010 1011 if (irq_stat & PORT_IRQ_UNK_FIS) { 1012 ehi->err_mask |= AC_ERR_HSM; 1013 ehi->action |= ATA_EH_RESET; 1014 ata_ehi_push_desc(ehi, "unknown FIS"); 1015 freeze = 1; 1016 } 1017 1018 /* deal with command error */ 1019 if (irq_stat & PORT_IRQ_ERROR) { 1020 const struct sil24_cerr_info *ci = NULL; 1021 unsigned int err_mask = 0, action = 0; 1022 u32 context, cerr; 1023 int pmp; 1024 1025 abort = 1; 1026 1027 /* DMA Context Switch Failure in Port Multiplier Mode 1028 * errata. If we have active commands to 3 or more 1029 * devices, any error condition on active devices can 1030 * corrupt DMA context switching. 1031 */ 1032 if (ap->nr_active_links >= 3) { 1033 ehi->err_mask |= AC_ERR_OTHER; 1034 ehi->action |= ATA_EH_RESET; 1035 ata_ehi_push_desc(ehi, "PMP DMA CS errata"); 1036 pp->do_port_rst = 1; 1037 freeze = 1; 1038 } 1039 1040 /* find out the offending link and qc */ 1041 if (sata_pmp_attached(ap)) { 1042 context = readl(port + PORT_CONTEXT); 1043 pmp = (context >> 5) & 0xf; 1044 1045 if (pmp < ap->nr_pmp_links) { 1046 link = &ap->pmp_link[pmp]; 1047 ehi = &link->eh_info; 1048 qc = ata_qc_from_tag(ap, link->active_tag); 1049 1050 ata_ehi_clear_desc(ehi); 1051 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", 1052 irq_stat); 1053 } else { 1054 err_mask |= AC_ERR_HSM; 1055 action |= ATA_EH_RESET; 1056 freeze = 1; 1057 } 1058 } else 1059 qc = ata_qc_from_tag(ap, link->active_tag); 1060 1061 /* analyze CMD_ERR */ 1062 cerr = readl(port + PORT_CMD_ERR); 1063 if (cerr < ARRAY_SIZE(sil24_cerr_db)) 1064 ci = &sil24_cerr_db[cerr]; 1065 1066 if (ci && ci->desc) { 1067 err_mask |= ci->err_mask; 1068 action |= ci->action; 1069 if (action & ATA_EH_RESET) 1070 freeze = 1; 1071 ata_ehi_push_desc(ehi, "%s", ci->desc); 1072 } else { 1073 err_mask |= AC_ERR_OTHER; 1074 action |= ATA_EH_RESET; 1075 freeze = 1; 1076 ata_ehi_push_desc(ehi, "unknown command error %d", 1077 cerr); 1078 } 1079 1080 /* record error info */ 1081 if (qc) 1082 qc->err_mask |= err_mask; 1083 else 1084 ehi->err_mask |= err_mask; 1085 1086 ehi->action |= action; 1087 1088 /* if PMP, resume */ 1089 if (sata_pmp_attached(ap)) 1090 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT); 1091 } 1092 1093 /* freeze or abort */ 1094 if (freeze) 1095 ata_port_freeze(ap); 1096 else if (abort) { 1097 if (qc) 1098 ata_link_abort(qc->dev->link); 1099 else 1100 ata_port_abort(ap); 1101 } 1102 } 1103 1104 static inline void sil24_host_intr(struct ata_port *ap) 1105 { 1106 void __iomem *port = sil24_port_base(ap); 1107 u32 slot_stat, qc_active; 1108 int rc; 1109 1110 /* If PCIX_IRQ_WOC, there's an inherent race window between 1111 * clearing IRQ pending status and reading PORT_SLOT_STAT 1112 * which may cause spurious interrupts afterwards. This is 1113 * unavoidable and much better than losing interrupts which 1114 * happens if IRQ pending is cleared after reading 1115 * PORT_SLOT_STAT. 1116 */ 1117 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 1118 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT); 1119 1120 slot_stat = readl(port + PORT_SLOT_STAT); 1121 1122 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) { 1123 sil24_error_intr(ap); 1124 return; 1125 } 1126 1127 qc_active = slot_stat & ~HOST_SSTAT_ATTN; 1128 rc = ata_qc_complete_multiple(ap, qc_active); 1129 if (rc > 0) 1130 return; 1131 if (rc < 0) { 1132 struct ata_eh_info *ehi = &ap->link.eh_info; 1133 ehi->err_mask |= AC_ERR_HSM; 1134 ehi->action |= ATA_EH_RESET; 1135 ata_port_freeze(ap); 1136 return; 1137 } 1138 1139 /* spurious interrupts are expected if PCIX_IRQ_WOC */ 1140 if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit()) 1141 ata_port_info(ap, 1142 "spurious interrupt (slot_stat 0x%x active_tag %d sactive 0x%x)\n", 1143 slot_stat, ap->link.active_tag, ap->link.sactive); 1144 } 1145 1146 static irqreturn_t sil24_interrupt(int irq, void *dev_instance) 1147 { 1148 struct ata_host *host = dev_instance; 1149 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1150 unsigned handled = 0; 1151 u32 status; 1152 int i; 1153 1154 status = readl(host_base + HOST_IRQ_STAT); 1155 1156 if (status == 0xffffffff) { 1157 dev_err(host->dev, "IRQ status == 0xffffffff, " 1158 "PCI fault or device removal?\n"); 1159 goto out; 1160 } 1161 1162 if (!(status & IRQ_STAT_4PORTS)) 1163 goto out; 1164 1165 spin_lock(&host->lock); 1166 1167 for (i = 0; i < host->n_ports; i++) 1168 if (status & (1 << i)) { 1169 sil24_host_intr(host->ports[i]); 1170 handled++; 1171 } 1172 1173 spin_unlock(&host->lock); 1174 out: 1175 return IRQ_RETVAL(handled); 1176 } 1177 1178 static void sil24_error_handler(struct ata_port *ap) 1179 { 1180 struct sil24_port_priv *pp = ap->private_data; 1181 1182 if (sil24_init_port(ap)) 1183 ata_eh_freeze_port(ap); 1184 1185 sata_pmp_error_handler(ap); 1186 1187 pp->do_port_rst = 0; 1188 } 1189 1190 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) 1191 { 1192 struct ata_port *ap = qc->ap; 1193 1194 /* make DMA engine forget about the failed command */ 1195 if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap)) 1196 ata_eh_freeze_port(ap); 1197 } 1198 1199 static int sil24_port_start(struct ata_port *ap) 1200 { 1201 struct device *dev = ap->host->dev; 1202 struct sil24_port_priv *pp; 1203 union sil24_cmd_block *cb; 1204 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS; 1205 dma_addr_t cb_dma; 1206 1207 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 1208 if (!pp) 1209 return -ENOMEM; 1210 1211 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); 1212 if (!cb) 1213 return -ENOMEM; 1214 memset(cb, 0, cb_size); 1215 1216 pp->cmd_block = cb; 1217 pp->cmd_block_dma = cb_dma; 1218 1219 ap->private_data = pp; 1220 1221 ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host"); 1222 ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port"); 1223 1224 return 0; 1225 } 1226 1227 static void sil24_init_controller(struct ata_host *host) 1228 { 1229 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1230 u32 tmp; 1231 int i; 1232 1233 /* GPIO off */ 1234 writel(0, host_base + HOST_FLASH_CMD); 1235 1236 /* clear global reset & mask interrupts during initialization */ 1237 writel(0, host_base + HOST_CTRL); 1238 1239 /* init ports */ 1240 for (i = 0; i < host->n_ports; i++) { 1241 struct ata_port *ap = host->ports[i]; 1242 void __iomem *port = sil24_port_base(ap); 1243 1244 1245 /* Initial PHY setting */ 1246 writel(0x20c, port + PORT_PHY_CFG); 1247 1248 /* Clear port RST */ 1249 tmp = readl(port + PORT_CTRL_STAT); 1250 if (tmp & PORT_CS_PORT_RST) { 1251 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 1252 tmp = ata_wait_register(NULL, port + PORT_CTRL_STAT, 1253 PORT_CS_PORT_RST, 1254 PORT_CS_PORT_RST, 10, 100); 1255 if (tmp & PORT_CS_PORT_RST) 1256 dev_err(host->dev, 1257 "failed to clear port RST\n"); 1258 } 1259 1260 /* configure port */ 1261 sil24_config_port(ap); 1262 } 1263 1264 /* Turn on interrupts */ 1265 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL); 1266 } 1267 1268 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 1269 { 1270 extern int __MARKER__sil24_cmd_block_is_sized_wrongly; 1271 struct ata_port_info pi = sil24_port_info[ent->driver_data]; 1272 const struct ata_port_info *ppi[] = { &pi, NULL }; 1273 void __iomem * const *iomap; 1274 struct ata_host *host; 1275 int rc; 1276 u32 tmp; 1277 1278 /* cause link error if sil24_cmd_block is sized wrongly */ 1279 if (sizeof(union sil24_cmd_block) != PAGE_SIZE) 1280 __MARKER__sil24_cmd_block_is_sized_wrongly = 1; 1281 1282 ata_print_version_once(&pdev->dev, DRV_VERSION); 1283 1284 /* acquire resources */ 1285 rc = pcim_enable_device(pdev); 1286 if (rc) 1287 return rc; 1288 1289 rc = pcim_iomap_regions(pdev, 1290 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR), 1291 DRV_NAME); 1292 if (rc) 1293 return rc; 1294 iomap = pcim_iomap_table(pdev); 1295 1296 /* apply workaround for completion IRQ loss on PCI-X errata */ 1297 if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) { 1298 tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL); 1299 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL)) 1300 dev_info(&pdev->dev, 1301 "Applying completion IRQ loss on PCI-X errata fix\n"); 1302 else 1303 pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC; 1304 } 1305 1306 /* allocate and fill host */ 1307 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1308 SIL24_FLAG2NPORTS(ppi[0]->flags)); 1309 if (!host) 1310 return -ENOMEM; 1311 host->iomap = iomap; 1312 1313 /* configure and activate the device */ 1314 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 1315 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 1316 if (rc) { 1317 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 1318 if (rc) { 1319 dev_err(&pdev->dev, 1320 "64-bit DMA enable failed\n"); 1321 return rc; 1322 } 1323 } 1324 } else { 1325 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 1326 if (rc) { 1327 dev_err(&pdev->dev, "32-bit DMA enable failed\n"); 1328 return rc; 1329 } 1330 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 1331 if (rc) { 1332 dev_err(&pdev->dev, 1333 "32-bit consistent DMA enable failed\n"); 1334 return rc; 1335 } 1336 } 1337 1338 /* Set max read request size to 4096. This slightly increases 1339 * write throughput for pci-e variants. 1340 */ 1341 pcie_set_readrq(pdev, 4096); 1342 1343 sil24_init_controller(host); 1344 1345 if (sata_sil24_msi && !pci_enable_msi(pdev)) { 1346 dev_info(&pdev->dev, "Using MSI\n"); 1347 pci_intx(pdev, 0); 1348 } 1349 1350 pci_set_master(pdev); 1351 return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED, 1352 &sil24_sht); 1353 } 1354 1355 #ifdef CONFIG_PM_SLEEP 1356 static int sil24_pci_device_resume(struct pci_dev *pdev) 1357 { 1358 struct ata_host *host = pci_get_drvdata(pdev); 1359 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1360 int rc; 1361 1362 rc = ata_pci_device_do_resume(pdev); 1363 if (rc) 1364 return rc; 1365 1366 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) 1367 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL); 1368 1369 sil24_init_controller(host); 1370 1371 ata_host_resume(host); 1372 1373 return 0; 1374 } 1375 #endif 1376 1377 #ifdef CONFIG_PM 1378 static int sil24_port_resume(struct ata_port *ap) 1379 { 1380 sil24_config_pmp(ap, ap->nr_pmp_links); 1381 return 0; 1382 } 1383 #endif 1384 1385 module_pci_driver(sil24_pci_driver); 1386 1387 MODULE_AUTHOR("Tejun Heo"); 1388 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver"); 1389 MODULE_LICENSE("GPL"); 1390 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl); 1391