1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers 4 * 5 * Copyright 2005 Tejun Heo 6 * 7 * Based on preview driver from Silicon Image. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/gfp.h> 13 #include <linux/pci.h> 14 #include <linux/blkdev.h> 15 #include <linux/delay.h> 16 #include <linux/interrupt.h> 17 #include <linux/dma-mapping.h> 18 #include <linux/device.h> 19 #include <scsi/scsi_host.h> 20 #include <scsi/scsi_cmnd.h> 21 #include <linux/libata.h> 22 23 #define DRV_NAME "sata_sil24" 24 #define DRV_VERSION "1.1" 25 26 /* 27 * Port request block (PRB) 32 bytes 28 */ 29 struct sil24_prb { 30 __le16 ctrl; 31 __le16 prot; 32 __le32 rx_cnt; 33 u8 fis[6 * 4]; 34 }; 35 36 /* 37 * Scatter gather entry (SGE) 16 bytes 38 */ 39 struct sil24_sge { 40 __le64 addr; 41 __le32 cnt; 42 __le32 flags; 43 }; 44 45 46 enum { 47 SIL24_HOST_BAR = 0, 48 SIL24_PORT_BAR = 2, 49 50 /* sil24 fetches in chunks of 64bytes. The first block 51 * contains the PRB and two SGEs. From the second block, it's 52 * consisted of four SGEs and called SGT. Calculate the 53 * number of SGTs that fit into one page. 54 */ 55 SIL24_PRB_SZ = sizeof(struct sil24_prb) 56 + 2 * sizeof(struct sil24_sge), 57 SIL24_MAX_SGT = (PAGE_SIZE - SIL24_PRB_SZ) 58 / (4 * sizeof(struct sil24_sge)), 59 60 /* This will give us one unused SGEs for ATA. This extra SGE 61 * will be used to store CDB for ATAPI devices. 62 */ 63 SIL24_MAX_SGE = 4 * SIL24_MAX_SGT + 1, 64 65 /* 66 * Global controller registers (128 bytes @ BAR0) 67 */ 68 /* 32 bit regs */ 69 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */ 70 HOST_CTRL = 0x40, 71 HOST_IRQ_STAT = 0x44, 72 HOST_PHY_CFG = 0x48, 73 HOST_BIST_CTRL = 0x50, 74 HOST_BIST_PTRN = 0x54, 75 HOST_BIST_STAT = 0x58, 76 HOST_MEM_BIST_STAT = 0x5c, 77 HOST_FLASH_CMD = 0x70, 78 /* 8 bit regs */ 79 HOST_FLASH_DATA = 0x74, 80 HOST_TRANSITION_DETECT = 0x75, 81 HOST_GPIO_CTRL = 0x76, 82 HOST_I2C_ADDR = 0x78, /* 32 bit */ 83 HOST_I2C_DATA = 0x7c, 84 HOST_I2C_XFER_CNT = 0x7e, 85 HOST_I2C_CTRL = 0x7f, 86 87 /* HOST_SLOT_STAT bits */ 88 HOST_SSTAT_ATTN = (1 << 31), 89 90 /* HOST_CTRL bits */ 91 HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */ 92 HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */ 93 HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */ 94 HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */ 95 HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */ 96 HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */ 97 98 /* 99 * Port registers 100 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2) 101 */ 102 PORT_REGS_SIZE = 0x2000, 103 104 PORT_LRAM = 0x0000, /* 31 LRAM slots and PMP regs */ 105 PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */ 106 107 PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */ 108 PORT_PMP_STATUS = 0x0000, /* port device status offset */ 109 PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */ 110 PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */ 111 112 /* 32 bit regs */ 113 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */ 114 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */ 115 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */ 116 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */ 117 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */ 118 PORT_ACTIVATE_UPPER_ADDR= 0x101c, 119 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */ 120 PORT_CMD_ERR = 0x1024, /* command error number */ 121 PORT_FIS_CFG = 0x1028, 122 PORT_FIFO_THRES = 0x102c, 123 /* 16 bit regs */ 124 PORT_DECODE_ERR_CNT = 0x1040, 125 PORT_DECODE_ERR_THRESH = 0x1042, 126 PORT_CRC_ERR_CNT = 0x1044, 127 PORT_CRC_ERR_THRESH = 0x1046, 128 PORT_HSHK_ERR_CNT = 0x1048, 129 PORT_HSHK_ERR_THRESH = 0x104a, 130 /* 32 bit regs */ 131 PORT_PHY_CFG = 0x1050, 132 PORT_SLOT_STAT = 0x1800, 133 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */ 134 PORT_CONTEXT = 0x1e04, 135 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */ 136 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */ 137 PORT_SCONTROL = 0x1f00, 138 PORT_SSTATUS = 0x1f04, 139 PORT_SERROR = 0x1f08, 140 PORT_SACTIVE = 0x1f0c, 141 142 /* PORT_CTRL_STAT bits */ 143 PORT_CS_PORT_RST = (1 << 0), /* port reset */ 144 PORT_CS_DEV_RST = (1 << 1), /* device reset */ 145 PORT_CS_INIT = (1 << 2), /* port initialize */ 146 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */ 147 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */ 148 PORT_CS_PMP_RESUME = (1 << 6), /* PMP resume */ 149 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */ 150 PORT_CS_PMP_EN = (1 << 13), /* port multiplier enable */ 151 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */ 152 153 /* PORT_IRQ_STAT/ENABLE_SET/CLR */ 154 /* bits[11:0] are masked */ 155 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */ 156 PORT_IRQ_ERROR = (1 << 1), /* command execution error */ 157 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */ 158 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */ 159 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */ 160 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */ 161 PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */ 162 PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */ 163 PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */ 164 PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */ 165 PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */ 166 PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */ 167 168 DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | 169 PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG | 170 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_NOTIFY, 171 172 /* bits[27:16] are unmasked (raw) */ 173 PORT_IRQ_RAW_SHIFT = 16, 174 PORT_IRQ_MASKED_MASK = 0x7ff, 175 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT), 176 177 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */ 178 PORT_IRQ_STEER_SHIFT = 30, 179 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT), 180 181 /* PORT_CMD_ERR constants */ 182 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */ 183 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */ 184 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */ 185 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */ 186 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */ 187 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */ 188 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */ 189 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */ 190 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */ 191 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */ 192 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */ 193 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */ 194 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */ 195 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */ 196 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */ 197 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */ 198 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */ 199 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */ 200 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */ 201 PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */ 202 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */ 203 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */ 204 205 /* bits of PRB control field */ 206 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */ 207 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */ 208 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */ 209 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */ 210 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */ 211 212 /* PRB protocol field */ 213 PRB_PROT_PACKET = (1 << 0), 214 PRB_PROT_TCQ = (1 << 1), 215 PRB_PROT_NCQ = (1 << 2), 216 PRB_PROT_READ = (1 << 3), 217 PRB_PROT_WRITE = (1 << 4), 218 PRB_PROT_TRANSPARENT = (1 << 5), 219 220 /* 221 * Other constants 222 */ 223 SGE_TRM = (1 << 31), /* Last SGE in chain */ 224 SGE_LNK = (1 << 30), /* linked list 225 Points to SGT, not SGE */ 226 SGE_DRD = (1 << 29), /* discard data read (/dev/null) 227 data address ignored */ 228 229 SIL24_MAX_CMDS = 31, 230 231 /* board id */ 232 BID_SIL3124 = 0, 233 BID_SIL3132 = 1, 234 BID_SIL3131 = 2, 235 236 /* host flags */ 237 SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | 238 ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA | 239 ATA_FLAG_AN | ATA_FLAG_PMP, 240 SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */ 241 242 IRQ_STAT_4PORTS = 0xf, 243 }; 244 245 struct sil24_ata_block { 246 struct sil24_prb prb; 247 struct sil24_sge sge[SIL24_MAX_SGE]; 248 }; 249 250 struct sil24_atapi_block { 251 struct sil24_prb prb; 252 u8 cdb[16]; 253 struct sil24_sge sge[SIL24_MAX_SGE]; 254 }; 255 256 union sil24_cmd_block { 257 struct sil24_ata_block ata; 258 struct sil24_atapi_block atapi; 259 }; 260 261 static const struct sil24_cerr_info { 262 unsigned int err_mask, action; 263 const char *desc; 264 } sil24_cerr_db[] = { 265 [0] = { AC_ERR_DEV, 0, 266 "device error" }, 267 [PORT_CERR_DEV] = { AC_ERR_DEV, 0, 268 "device error via D2H FIS" }, 269 [PORT_CERR_SDB] = { AC_ERR_DEV, 0, 270 "device error via SDB FIS" }, 271 [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_RESET, 272 "error in data FIS" }, 273 [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_RESET, 274 "failed to transmit command FIS" }, 275 [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_RESET, 276 "protocol mismatch" }, 277 [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_RESET, 278 "data direction mismatch" }, 279 [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_RESET, 280 "ran out of SGEs while writing" }, 281 [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_RESET, 282 "ran out of SGEs while reading" }, 283 [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_RESET, 284 "invalid data direction for ATAPI CDB" }, 285 [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET, 286 "SGT not on qword boundary" }, 287 [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 288 "PCI target abort while fetching SGT" }, 289 [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 290 "PCI master abort while fetching SGT" }, 291 [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 292 "PCI parity error while fetching SGT" }, 293 [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET, 294 "PRB not on qword boundary" }, 295 [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 296 "PCI target abort while fetching PRB" }, 297 [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 298 "PCI master abort while fetching PRB" }, 299 [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 300 "PCI parity error while fetching PRB" }, 301 [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 302 "undefined error while transferring data" }, 303 [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 304 "PCI target abort while transferring data" }, 305 [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 306 "PCI master abort while transferring data" }, 307 [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, 308 "PCI parity error while transferring data" }, 309 [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_RESET, 310 "FIS received while sending service FIS" }, 311 }; 312 313 /* 314 * ap->private_data 315 * 316 * The preview driver always returned 0 for status. We emulate it 317 * here from the previous interrupt. 318 */ 319 struct sil24_port_priv { 320 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */ 321 dma_addr_t cmd_block_dma; /* DMA base addr for them */ 322 int do_port_rst; 323 }; 324 325 static void sil24_dev_config(struct ata_device *dev); 326 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val); 327 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val); 328 static int sil24_qc_defer(struct ata_queued_cmd *qc); 329 static enum ata_completion_errors sil24_qc_prep(struct ata_queued_cmd *qc); 330 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); 331 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc); 332 static void sil24_pmp_attach(struct ata_port *ap); 333 static void sil24_pmp_detach(struct ata_port *ap); 334 static void sil24_freeze(struct ata_port *ap); 335 static void sil24_thaw(struct ata_port *ap); 336 static int sil24_softreset(struct ata_link *link, unsigned int *class, 337 unsigned long deadline); 338 static int sil24_hardreset(struct ata_link *link, unsigned int *class, 339 unsigned long deadline); 340 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, 341 unsigned long deadline); 342 static void sil24_error_handler(struct ata_port *ap); 343 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc); 344 static int sil24_port_start(struct ata_port *ap); 345 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 346 #ifdef CONFIG_PM_SLEEP 347 static int sil24_pci_device_resume(struct pci_dev *pdev); 348 #endif 349 #ifdef CONFIG_PM 350 static int sil24_port_resume(struct ata_port *ap); 351 #endif 352 353 static const struct pci_device_id sil24_pci_tbl[] = { 354 { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 }, 355 { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 }, 356 { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 }, 357 { PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 }, 358 { PCI_VDEVICE(CMD, 0x0244), BID_SIL3132 }, 359 { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 }, 360 { PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 }, 361 362 { } /* terminate list */ 363 }; 364 365 static struct pci_driver sil24_pci_driver = { 366 .name = DRV_NAME, 367 .id_table = sil24_pci_tbl, 368 .probe = sil24_init_one, 369 .remove = ata_pci_remove_one, 370 #ifdef CONFIG_PM_SLEEP 371 .suspend = ata_pci_device_suspend, 372 .resume = sil24_pci_device_resume, 373 #endif 374 }; 375 376 static struct scsi_host_template sil24_sht = { 377 __ATA_BASE_SHT(DRV_NAME), 378 .can_queue = SIL24_MAX_CMDS, 379 .sg_tablesize = SIL24_MAX_SGE, 380 .dma_boundary = ATA_DMA_BOUNDARY, 381 .tag_alloc_policy = BLK_TAG_ALLOC_FIFO, 382 .sdev_groups = ata_ncq_sdev_groups, 383 .change_queue_depth = ata_scsi_change_queue_depth, 384 .slave_configure = ata_scsi_slave_config 385 }; 386 387 static struct ata_port_operations sil24_ops = { 388 .inherits = &sata_pmp_port_ops, 389 390 .qc_defer = sil24_qc_defer, 391 .qc_prep = sil24_qc_prep, 392 .qc_issue = sil24_qc_issue, 393 .qc_fill_rtf = sil24_qc_fill_rtf, 394 395 .freeze = sil24_freeze, 396 .thaw = sil24_thaw, 397 .softreset = sil24_softreset, 398 .hardreset = sil24_hardreset, 399 .pmp_softreset = sil24_softreset, 400 .pmp_hardreset = sil24_pmp_hardreset, 401 .error_handler = sil24_error_handler, 402 .post_internal_cmd = sil24_post_internal_cmd, 403 .dev_config = sil24_dev_config, 404 405 .scr_read = sil24_scr_read, 406 .scr_write = sil24_scr_write, 407 .pmp_attach = sil24_pmp_attach, 408 .pmp_detach = sil24_pmp_detach, 409 410 .port_start = sil24_port_start, 411 #ifdef CONFIG_PM 412 .port_resume = sil24_port_resume, 413 #endif 414 }; 415 416 static bool sata_sil24_msi; /* Disable MSI */ 417 module_param_named(msi, sata_sil24_msi, bool, S_IRUGO); 418 MODULE_PARM_DESC(msi, "Enable MSI (Default: false)"); 419 420 /* 421 * Use bits 30-31 of port_flags to encode available port numbers. 422 * Current maxium is 4. 423 */ 424 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30) 425 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1) 426 427 static const struct ata_port_info sil24_port_info[] = { 428 /* sil_3124 */ 429 { 430 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) | 431 SIL24_FLAG_PCIX_IRQ_WOC, 432 .pio_mask = ATA_PIO4, 433 .mwdma_mask = ATA_MWDMA2, 434 .udma_mask = ATA_UDMA5, 435 .port_ops = &sil24_ops, 436 }, 437 /* sil_3132 */ 438 { 439 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2), 440 .pio_mask = ATA_PIO4, 441 .mwdma_mask = ATA_MWDMA2, 442 .udma_mask = ATA_UDMA5, 443 .port_ops = &sil24_ops, 444 }, 445 /* sil_3131/sil_3531 */ 446 { 447 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1), 448 .pio_mask = ATA_PIO4, 449 .mwdma_mask = ATA_MWDMA2, 450 .udma_mask = ATA_UDMA5, 451 .port_ops = &sil24_ops, 452 }, 453 }; 454 455 static int sil24_tag(int tag) 456 { 457 if (unlikely(ata_tag_internal(tag))) 458 return 0; 459 return tag; 460 } 461 462 static unsigned long sil24_port_offset(struct ata_port *ap) 463 { 464 return ap->port_no * PORT_REGS_SIZE; 465 } 466 467 static void __iomem *sil24_port_base(struct ata_port *ap) 468 { 469 return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap); 470 } 471 472 static void sil24_dev_config(struct ata_device *dev) 473 { 474 void __iomem *port = sil24_port_base(dev->link->ap); 475 476 if (dev->cdb_len == 16) 477 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT); 478 else 479 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR); 480 } 481 482 static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf) 483 { 484 void __iomem *port = sil24_port_base(ap); 485 struct sil24_prb __iomem *prb; 486 u8 fis[6 * 4]; 487 488 prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ; 489 memcpy_fromio(fis, prb->fis, sizeof(fis)); 490 ata_tf_from_fis(fis, tf); 491 } 492 493 static int sil24_scr_map[] = { 494 [SCR_CONTROL] = 0, 495 [SCR_STATUS] = 1, 496 [SCR_ERROR] = 2, 497 [SCR_ACTIVE] = 3, 498 }; 499 500 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) 501 { 502 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; 503 504 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 505 *val = readl(scr_addr + sil24_scr_map[sc_reg] * 4); 506 return 0; 507 } 508 return -EINVAL; 509 } 510 511 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) 512 { 513 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; 514 515 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 516 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); 517 return 0; 518 } 519 return -EINVAL; 520 } 521 522 static void sil24_config_port(struct ata_port *ap) 523 { 524 void __iomem *port = sil24_port_base(ap); 525 526 /* configure IRQ WoC */ 527 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 528 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT); 529 else 530 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); 531 532 /* zero error counters. */ 533 writew(0x8000, port + PORT_DECODE_ERR_THRESH); 534 writew(0x8000, port + PORT_CRC_ERR_THRESH); 535 writew(0x8000, port + PORT_HSHK_ERR_THRESH); 536 writew(0x0000, port + PORT_DECODE_ERR_CNT); 537 writew(0x0000, port + PORT_CRC_ERR_CNT); 538 writew(0x0000, port + PORT_HSHK_ERR_CNT); 539 540 /* always use 64bit activation */ 541 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR); 542 543 /* clear port multiplier enable and resume bits */ 544 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 545 } 546 547 static void sil24_config_pmp(struct ata_port *ap, int attached) 548 { 549 void __iomem *port = sil24_port_base(ap); 550 551 if (attached) 552 writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT); 553 else 554 writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR); 555 } 556 557 static void sil24_clear_pmp(struct ata_port *ap) 558 { 559 void __iomem *port = sil24_port_base(ap); 560 int i; 561 562 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 563 564 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { 565 void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE; 566 567 writel(0, pmp_base + PORT_PMP_STATUS); 568 writel(0, pmp_base + PORT_PMP_QACTIVE); 569 } 570 } 571 572 static int sil24_init_port(struct ata_port *ap) 573 { 574 void __iomem *port = sil24_port_base(ap); 575 struct sil24_port_priv *pp = ap->private_data; 576 u32 tmp; 577 578 /* clear PMP error status */ 579 if (sata_pmp_attached(ap)) 580 sil24_clear_pmp(ap); 581 582 writel(PORT_CS_INIT, port + PORT_CTRL_STAT); 583 ata_wait_register(ap, port + PORT_CTRL_STAT, 584 PORT_CS_INIT, PORT_CS_INIT, 10, 100); 585 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 586 PORT_CS_RDY, 0, 10, 100); 587 588 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) { 589 pp->do_port_rst = 1; 590 ap->link.eh_context.i.action |= ATA_EH_RESET; 591 return -EIO; 592 } 593 594 return 0; 595 } 596 597 static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp, 598 const struct ata_taskfile *tf, 599 int is_cmd, u32 ctrl, 600 unsigned long timeout_msec) 601 { 602 void __iomem *port = sil24_port_base(ap); 603 struct sil24_port_priv *pp = ap->private_data; 604 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb; 605 dma_addr_t paddr = pp->cmd_block_dma; 606 u32 irq_enabled, irq_mask, irq_stat; 607 int rc; 608 609 prb->ctrl = cpu_to_le16(ctrl); 610 ata_tf_to_fis(tf, pmp, is_cmd, prb->fis); 611 612 /* temporarily plug completion and error interrupts */ 613 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET); 614 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR); 615 616 /* 617 * The barrier is required to ensure that writes to cmd_block reach 618 * the memory before the write to PORT_CMD_ACTIVATE. 619 */ 620 wmb(); 621 writel((u32)paddr, port + PORT_CMD_ACTIVATE); 622 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); 623 624 irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT; 625 irq_stat = ata_wait_register(ap, port + PORT_IRQ_STAT, irq_mask, 0x0, 626 10, timeout_msec); 627 628 writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */ 629 irq_stat >>= PORT_IRQ_RAW_SHIFT; 630 631 if (irq_stat & PORT_IRQ_COMPLETE) 632 rc = 0; 633 else { 634 /* force port into known state */ 635 sil24_init_port(ap); 636 637 if (irq_stat & PORT_IRQ_ERROR) 638 rc = -EIO; 639 else 640 rc = -EBUSY; 641 } 642 643 /* restore IRQ enabled */ 644 writel(irq_enabled, port + PORT_IRQ_ENABLE_SET); 645 646 return rc; 647 } 648 649 static int sil24_softreset(struct ata_link *link, unsigned int *class, 650 unsigned long deadline) 651 { 652 struct ata_port *ap = link->ap; 653 int pmp = sata_srst_pmp(link); 654 unsigned long timeout_msec = 0; 655 struct ata_taskfile tf; 656 const char *reason; 657 int rc; 658 659 /* put the port into known state */ 660 if (sil24_init_port(ap)) { 661 reason = "port not ready"; 662 goto err; 663 } 664 665 /* do SRST */ 666 if (time_after(deadline, jiffies)) 667 timeout_msec = jiffies_to_msecs(deadline - jiffies); 668 669 ata_tf_init(link->device, &tf); /* doesn't really matter */ 670 rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST, 671 timeout_msec); 672 if (rc == -EBUSY) { 673 reason = "timeout"; 674 goto err; 675 } else if (rc) { 676 reason = "SRST command error"; 677 goto err; 678 } 679 680 sil24_read_tf(ap, 0, &tf); 681 *class = ata_port_classify(ap, &tf); 682 683 return 0; 684 685 err: 686 ata_link_err(link, "softreset failed (%s)\n", reason); 687 return -EIO; 688 } 689 690 static int sil24_hardreset(struct ata_link *link, unsigned int *class, 691 unsigned long deadline) 692 { 693 struct ata_port *ap = link->ap; 694 void __iomem *port = sil24_port_base(ap); 695 struct sil24_port_priv *pp = ap->private_data; 696 int did_port_rst = 0; 697 const char *reason; 698 int tout_msec, rc; 699 u32 tmp; 700 701 retry: 702 /* Sometimes, DEV_RST is not enough to recover the controller. 703 * This happens often after PM DMA CS errata. 704 */ 705 if (pp->do_port_rst) { 706 ata_port_warn(ap, 707 "controller in dubious state, performing PORT_RST\n"); 708 709 writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT); 710 ata_msleep(ap, 10); 711 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 712 ata_wait_register(ap, port + PORT_CTRL_STAT, PORT_CS_RDY, 0, 713 10, 5000); 714 715 /* restore port configuration */ 716 sil24_config_port(ap); 717 sil24_config_pmp(ap, ap->nr_pmp_links); 718 719 pp->do_port_rst = 0; 720 did_port_rst = 1; 721 } 722 723 /* sil24 does the right thing(tm) without any protection */ 724 sata_set_spd(link); 725 726 tout_msec = 100; 727 if (ata_link_online(link)) 728 tout_msec = 5000; 729 730 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); 731 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 732 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10, 733 tout_msec); 734 735 /* SStatus oscillates between zero and valid status after 736 * DEV_RST, debounce it. 737 */ 738 rc = sata_link_debounce(link, sata_deb_timing_long, deadline); 739 if (rc) { 740 reason = "PHY debouncing failed"; 741 goto err; 742 } 743 744 if (tmp & PORT_CS_DEV_RST) { 745 if (ata_link_offline(link)) 746 return 0; 747 reason = "link not ready"; 748 goto err; 749 } 750 751 /* Sil24 doesn't store signature FIS after hardreset, so we 752 * can't wait for BSY to clear. Some devices take a long time 753 * to get ready and those devices will choke if we don't wait 754 * for BSY clearance here. Tell libata to perform follow-up 755 * softreset. 756 */ 757 return -EAGAIN; 758 759 err: 760 if (!did_port_rst) { 761 pp->do_port_rst = 1; 762 goto retry; 763 } 764 765 ata_link_err(link, "hardreset failed (%s)\n", reason); 766 return -EIO; 767 } 768 769 static inline void sil24_fill_sg(struct ata_queued_cmd *qc, 770 struct sil24_sge *sge) 771 { 772 struct scatterlist *sg; 773 struct sil24_sge *last_sge = NULL; 774 unsigned int si; 775 776 for_each_sg(qc->sg, sg, qc->n_elem, si) { 777 sge->addr = cpu_to_le64(sg_dma_address(sg)); 778 sge->cnt = cpu_to_le32(sg_dma_len(sg)); 779 sge->flags = 0; 780 781 last_sge = sge; 782 sge++; 783 } 784 785 last_sge->flags = cpu_to_le32(SGE_TRM); 786 } 787 788 static int sil24_qc_defer(struct ata_queued_cmd *qc) 789 { 790 struct ata_link *link = qc->dev->link; 791 struct ata_port *ap = link->ap; 792 u8 prot = qc->tf.protocol; 793 794 /* 795 * There is a bug in the chip: 796 * Port LRAM Causes the PRB/SGT Data to be Corrupted 797 * If the host issues a read request for LRAM and SActive registers 798 * while active commands are available in the port, PRB/SGT data in 799 * the LRAM can become corrupted. This issue applies only when 800 * reading from, but not writing to, the LRAM. 801 * 802 * Therefore, reading LRAM when there is no particular error [and 803 * other commands may be outstanding] is prohibited. 804 * 805 * To avoid this bug there are two situations where a command must run 806 * exclusive of any other commands on the port: 807 * 808 * - ATAPI commands which check the sense data 809 * - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF 810 * set. 811 * 812 */ 813 int is_excl = (ata_is_atapi(prot) || 814 (qc->flags & ATA_QCFLAG_RESULT_TF)); 815 816 if (unlikely(ap->excl_link)) { 817 if (link == ap->excl_link) { 818 if (ap->nr_active_links) 819 return ATA_DEFER_PORT; 820 qc->flags |= ATA_QCFLAG_CLEAR_EXCL; 821 } else 822 return ATA_DEFER_PORT; 823 } else if (unlikely(is_excl)) { 824 ap->excl_link = link; 825 if (ap->nr_active_links) 826 return ATA_DEFER_PORT; 827 qc->flags |= ATA_QCFLAG_CLEAR_EXCL; 828 } 829 830 return ata_std_qc_defer(qc); 831 } 832 833 static enum ata_completion_errors sil24_qc_prep(struct ata_queued_cmd *qc) 834 { 835 struct ata_port *ap = qc->ap; 836 struct sil24_port_priv *pp = ap->private_data; 837 union sil24_cmd_block *cb; 838 struct sil24_prb *prb; 839 struct sil24_sge *sge; 840 u16 ctrl = 0; 841 842 cb = &pp->cmd_block[sil24_tag(qc->hw_tag)]; 843 844 if (!ata_is_atapi(qc->tf.protocol)) { 845 prb = &cb->ata.prb; 846 sge = cb->ata.sge; 847 if (ata_is_data(qc->tf.protocol)) { 848 u16 prot = 0; 849 ctrl = PRB_CTRL_PROTOCOL; 850 if (ata_is_ncq(qc->tf.protocol)) 851 prot |= PRB_PROT_NCQ; 852 if (qc->tf.flags & ATA_TFLAG_WRITE) 853 prot |= PRB_PROT_WRITE; 854 else 855 prot |= PRB_PROT_READ; 856 prb->prot = cpu_to_le16(prot); 857 } 858 } else { 859 prb = &cb->atapi.prb; 860 sge = cb->atapi.sge; 861 memset(cb->atapi.cdb, 0, sizeof(cb->atapi.cdb)); 862 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len); 863 864 if (ata_is_data(qc->tf.protocol)) { 865 if (qc->tf.flags & ATA_TFLAG_WRITE) 866 ctrl = PRB_CTRL_PACKET_WRITE; 867 else 868 ctrl = PRB_CTRL_PACKET_READ; 869 } 870 } 871 872 prb->ctrl = cpu_to_le16(ctrl); 873 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis); 874 875 if (qc->flags & ATA_QCFLAG_DMAMAP) 876 sil24_fill_sg(qc, sge); 877 878 return AC_ERR_OK; 879 } 880 881 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc) 882 { 883 struct ata_port *ap = qc->ap; 884 struct sil24_port_priv *pp = ap->private_data; 885 void __iomem *port = sil24_port_base(ap); 886 unsigned int tag = sil24_tag(qc->hw_tag); 887 dma_addr_t paddr; 888 void __iomem *activate; 889 890 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block); 891 activate = port + PORT_CMD_ACTIVATE + tag * 8; 892 893 /* 894 * The barrier is required to ensure that writes to cmd_block reach 895 * the memory before the write to PORT_CMD_ACTIVATE. 896 */ 897 wmb(); 898 writel((u32)paddr, activate); 899 writel((u64)paddr >> 32, activate + 4); 900 901 return 0; 902 } 903 904 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc) 905 { 906 sil24_read_tf(qc->ap, qc->hw_tag, &qc->result_tf); 907 return true; 908 } 909 910 static void sil24_pmp_attach(struct ata_port *ap) 911 { 912 u32 *gscr = ap->link.device->gscr; 913 914 sil24_config_pmp(ap, 1); 915 sil24_init_port(ap); 916 917 if (sata_pmp_gscr_vendor(gscr) == 0x11ab && 918 sata_pmp_gscr_devid(gscr) == 0x4140) { 919 ata_port_info(ap, 920 "disabling NCQ support due to sil24-mv4140 quirk\n"); 921 ap->flags &= ~ATA_FLAG_NCQ; 922 } 923 } 924 925 static void sil24_pmp_detach(struct ata_port *ap) 926 { 927 sil24_init_port(ap); 928 sil24_config_pmp(ap, 0); 929 930 ap->flags |= ATA_FLAG_NCQ; 931 } 932 933 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, 934 unsigned long deadline) 935 { 936 int rc; 937 938 rc = sil24_init_port(link->ap); 939 if (rc) { 940 ata_link_err(link, "hardreset failed (port not ready)\n"); 941 return rc; 942 } 943 944 return sata_std_hardreset(link, class, deadline); 945 } 946 947 static void sil24_freeze(struct ata_port *ap) 948 { 949 void __iomem *port = sil24_port_base(ap); 950 951 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear 952 * PORT_IRQ_ENABLE instead. 953 */ 954 writel(0xffff, port + PORT_IRQ_ENABLE_CLR); 955 } 956 957 static void sil24_thaw(struct ata_port *ap) 958 { 959 void __iomem *port = sil24_port_base(ap); 960 u32 tmp; 961 962 /* clear IRQ */ 963 tmp = readl(port + PORT_IRQ_STAT); 964 writel(tmp, port + PORT_IRQ_STAT); 965 966 /* turn IRQ back on */ 967 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET); 968 } 969 970 static void sil24_error_intr(struct ata_port *ap) 971 { 972 void __iomem *port = sil24_port_base(ap); 973 struct sil24_port_priv *pp = ap->private_data; 974 struct ata_queued_cmd *qc = NULL; 975 struct ata_link *link; 976 struct ata_eh_info *ehi; 977 int abort = 0, freeze = 0; 978 u32 irq_stat; 979 980 /* on error, we need to clear IRQ explicitly */ 981 irq_stat = readl(port + PORT_IRQ_STAT); 982 writel(irq_stat, port + PORT_IRQ_STAT); 983 984 /* first, analyze and record host port events */ 985 link = &ap->link; 986 ehi = &link->eh_info; 987 ata_ehi_clear_desc(ehi); 988 989 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); 990 991 if (irq_stat & PORT_IRQ_SDB_NOTIFY) { 992 ata_ehi_push_desc(ehi, "SDB notify"); 993 sata_async_notification(ap); 994 } 995 996 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) { 997 ata_ehi_hotplugged(ehi); 998 ata_ehi_push_desc(ehi, "%s", 999 irq_stat & PORT_IRQ_PHYRDY_CHG ? 1000 "PHY RDY changed" : "device exchanged"); 1001 freeze = 1; 1002 } 1003 1004 if (irq_stat & PORT_IRQ_UNK_FIS) { 1005 ehi->err_mask |= AC_ERR_HSM; 1006 ehi->action |= ATA_EH_RESET; 1007 ata_ehi_push_desc(ehi, "unknown FIS"); 1008 freeze = 1; 1009 } 1010 1011 /* deal with command error */ 1012 if (irq_stat & PORT_IRQ_ERROR) { 1013 const struct sil24_cerr_info *ci = NULL; 1014 unsigned int err_mask = 0, action = 0; 1015 u32 context, cerr; 1016 int pmp; 1017 1018 abort = 1; 1019 1020 /* DMA Context Switch Failure in Port Multiplier Mode 1021 * errata. If we have active commands to 3 or more 1022 * devices, any error condition on active devices can 1023 * corrupt DMA context switching. 1024 */ 1025 if (ap->nr_active_links >= 3) { 1026 ehi->err_mask |= AC_ERR_OTHER; 1027 ehi->action |= ATA_EH_RESET; 1028 ata_ehi_push_desc(ehi, "PMP DMA CS errata"); 1029 pp->do_port_rst = 1; 1030 freeze = 1; 1031 } 1032 1033 /* find out the offending link and qc */ 1034 if (sata_pmp_attached(ap)) { 1035 context = readl(port + PORT_CONTEXT); 1036 pmp = (context >> 5) & 0xf; 1037 1038 if (pmp < ap->nr_pmp_links) { 1039 link = &ap->pmp_link[pmp]; 1040 ehi = &link->eh_info; 1041 qc = ata_qc_from_tag(ap, link->active_tag); 1042 1043 ata_ehi_clear_desc(ehi); 1044 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", 1045 irq_stat); 1046 } else { 1047 err_mask |= AC_ERR_HSM; 1048 action |= ATA_EH_RESET; 1049 freeze = 1; 1050 } 1051 } else 1052 qc = ata_qc_from_tag(ap, link->active_tag); 1053 1054 /* analyze CMD_ERR */ 1055 cerr = readl(port + PORT_CMD_ERR); 1056 if (cerr < ARRAY_SIZE(sil24_cerr_db)) 1057 ci = &sil24_cerr_db[cerr]; 1058 1059 if (ci && ci->desc) { 1060 err_mask |= ci->err_mask; 1061 action |= ci->action; 1062 if (action & ATA_EH_RESET) 1063 freeze = 1; 1064 ata_ehi_push_desc(ehi, "%s", ci->desc); 1065 } else { 1066 err_mask |= AC_ERR_OTHER; 1067 action |= ATA_EH_RESET; 1068 freeze = 1; 1069 ata_ehi_push_desc(ehi, "unknown command error %d", 1070 cerr); 1071 } 1072 1073 /* record error info */ 1074 if (qc) 1075 qc->err_mask |= err_mask; 1076 else 1077 ehi->err_mask |= err_mask; 1078 1079 ehi->action |= action; 1080 1081 /* if PMP, resume */ 1082 if (sata_pmp_attached(ap)) 1083 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT); 1084 } 1085 1086 /* freeze or abort */ 1087 if (freeze) 1088 ata_port_freeze(ap); 1089 else if (abort) { 1090 if (qc) 1091 ata_link_abort(qc->dev->link); 1092 else 1093 ata_port_abort(ap); 1094 } 1095 } 1096 1097 static inline void sil24_host_intr(struct ata_port *ap) 1098 { 1099 void __iomem *port = sil24_port_base(ap); 1100 u32 slot_stat, qc_active; 1101 int rc; 1102 1103 /* If PCIX_IRQ_WOC, there's an inherent race window between 1104 * clearing IRQ pending status and reading PORT_SLOT_STAT 1105 * which may cause spurious interrupts afterwards. This is 1106 * unavoidable and much better than losing interrupts which 1107 * happens if IRQ pending is cleared after reading 1108 * PORT_SLOT_STAT. 1109 */ 1110 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 1111 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT); 1112 1113 slot_stat = readl(port + PORT_SLOT_STAT); 1114 1115 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) { 1116 sil24_error_intr(ap); 1117 return; 1118 } 1119 1120 qc_active = slot_stat & ~HOST_SSTAT_ATTN; 1121 rc = ata_qc_complete_multiple(ap, qc_active); 1122 if (rc > 0) 1123 return; 1124 if (rc < 0) { 1125 struct ata_eh_info *ehi = &ap->link.eh_info; 1126 ehi->err_mask |= AC_ERR_HSM; 1127 ehi->action |= ATA_EH_RESET; 1128 ata_port_freeze(ap); 1129 return; 1130 } 1131 1132 /* spurious interrupts are expected if PCIX_IRQ_WOC */ 1133 if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit()) 1134 ata_port_info(ap, 1135 "spurious interrupt (slot_stat 0x%x active_tag %d sactive 0x%x)\n", 1136 slot_stat, ap->link.active_tag, ap->link.sactive); 1137 } 1138 1139 static irqreturn_t sil24_interrupt(int irq, void *dev_instance) 1140 { 1141 struct ata_host *host = dev_instance; 1142 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1143 unsigned handled = 0; 1144 u32 status; 1145 int i; 1146 1147 status = readl(host_base + HOST_IRQ_STAT); 1148 1149 if (status == 0xffffffff) { 1150 dev_err(host->dev, "IRQ status == 0xffffffff, " 1151 "PCI fault or device removal?\n"); 1152 goto out; 1153 } 1154 1155 if (!(status & IRQ_STAT_4PORTS)) 1156 goto out; 1157 1158 spin_lock(&host->lock); 1159 1160 for (i = 0; i < host->n_ports; i++) 1161 if (status & (1 << i)) { 1162 sil24_host_intr(host->ports[i]); 1163 handled++; 1164 } 1165 1166 spin_unlock(&host->lock); 1167 out: 1168 return IRQ_RETVAL(handled); 1169 } 1170 1171 static void sil24_error_handler(struct ata_port *ap) 1172 { 1173 struct sil24_port_priv *pp = ap->private_data; 1174 1175 if (sil24_init_port(ap)) 1176 ata_eh_freeze_port(ap); 1177 1178 sata_pmp_error_handler(ap); 1179 1180 pp->do_port_rst = 0; 1181 } 1182 1183 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) 1184 { 1185 struct ata_port *ap = qc->ap; 1186 1187 /* make DMA engine forget about the failed command */ 1188 if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap)) 1189 ata_eh_freeze_port(ap); 1190 } 1191 1192 static int sil24_port_start(struct ata_port *ap) 1193 { 1194 struct device *dev = ap->host->dev; 1195 struct sil24_port_priv *pp; 1196 union sil24_cmd_block *cb; 1197 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS; 1198 dma_addr_t cb_dma; 1199 1200 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 1201 if (!pp) 1202 return -ENOMEM; 1203 1204 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); 1205 if (!cb) 1206 return -ENOMEM; 1207 1208 pp->cmd_block = cb; 1209 pp->cmd_block_dma = cb_dma; 1210 1211 ap->private_data = pp; 1212 1213 ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host"); 1214 ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port"); 1215 1216 return 0; 1217 } 1218 1219 static void sil24_init_controller(struct ata_host *host) 1220 { 1221 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1222 u32 tmp; 1223 int i; 1224 1225 /* GPIO off */ 1226 writel(0, host_base + HOST_FLASH_CMD); 1227 1228 /* clear global reset & mask interrupts during initialization */ 1229 writel(0, host_base + HOST_CTRL); 1230 1231 /* init ports */ 1232 for (i = 0; i < host->n_ports; i++) { 1233 struct ata_port *ap = host->ports[i]; 1234 void __iomem *port = sil24_port_base(ap); 1235 1236 1237 /* Initial PHY setting */ 1238 writel(0x20c, port + PORT_PHY_CFG); 1239 1240 /* Clear port RST */ 1241 tmp = readl(port + PORT_CTRL_STAT); 1242 if (tmp & PORT_CS_PORT_RST) { 1243 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 1244 tmp = ata_wait_register(NULL, port + PORT_CTRL_STAT, 1245 PORT_CS_PORT_RST, 1246 PORT_CS_PORT_RST, 10, 100); 1247 if (tmp & PORT_CS_PORT_RST) 1248 dev_err(host->dev, 1249 "failed to clear port RST\n"); 1250 } 1251 1252 /* configure port */ 1253 sil24_config_port(ap); 1254 } 1255 1256 /* Turn on interrupts */ 1257 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL); 1258 } 1259 1260 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 1261 { 1262 extern int __MARKER__sil24_cmd_block_is_sized_wrongly; 1263 struct ata_port_info pi = sil24_port_info[ent->driver_data]; 1264 const struct ata_port_info *ppi[] = { &pi, NULL }; 1265 void __iomem * const *iomap; 1266 struct ata_host *host; 1267 int rc; 1268 u32 tmp; 1269 1270 /* cause link error if sil24_cmd_block is sized wrongly */ 1271 if (sizeof(union sil24_cmd_block) != PAGE_SIZE) 1272 __MARKER__sil24_cmd_block_is_sized_wrongly = 1; 1273 1274 ata_print_version_once(&pdev->dev, DRV_VERSION); 1275 1276 /* acquire resources */ 1277 rc = pcim_enable_device(pdev); 1278 if (rc) 1279 return rc; 1280 1281 rc = pcim_iomap_regions(pdev, 1282 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR), 1283 DRV_NAME); 1284 if (rc) 1285 return rc; 1286 iomap = pcim_iomap_table(pdev); 1287 1288 /* apply workaround for completion IRQ loss on PCI-X errata */ 1289 if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) { 1290 tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL); 1291 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL)) 1292 dev_info(&pdev->dev, 1293 "Applying completion IRQ loss on PCI-X errata fix\n"); 1294 else 1295 pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC; 1296 } 1297 1298 /* allocate and fill host */ 1299 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1300 SIL24_FLAG2NPORTS(ppi[0]->flags)); 1301 if (!host) 1302 return -ENOMEM; 1303 host->iomap = iomap; 1304 1305 /* configure and activate the device */ 1306 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 1307 if (rc) { 1308 dev_err(&pdev->dev, "DMA enable failed\n"); 1309 return rc; 1310 } 1311 1312 /* Set max read request size to 4096. This slightly increases 1313 * write throughput for pci-e variants. 1314 */ 1315 pcie_set_readrq(pdev, 4096); 1316 1317 sil24_init_controller(host); 1318 1319 if (sata_sil24_msi && !pci_enable_msi(pdev)) { 1320 dev_info(&pdev->dev, "Using MSI\n"); 1321 pci_intx(pdev, 0); 1322 } 1323 1324 pci_set_master(pdev); 1325 return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED, 1326 &sil24_sht); 1327 } 1328 1329 #ifdef CONFIG_PM_SLEEP 1330 static int sil24_pci_device_resume(struct pci_dev *pdev) 1331 { 1332 struct ata_host *host = pci_get_drvdata(pdev); 1333 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1334 int rc; 1335 1336 rc = ata_pci_device_do_resume(pdev); 1337 if (rc) 1338 return rc; 1339 1340 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) 1341 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL); 1342 1343 sil24_init_controller(host); 1344 1345 ata_host_resume(host); 1346 1347 return 0; 1348 } 1349 #endif 1350 1351 #ifdef CONFIG_PM 1352 static int sil24_port_resume(struct ata_port *ap) 1353 { 1354 sil24_config_pmp(ap, ap->nr_pmp_links); 1355 return 0; 1356 } 1357 #endif 1358 1359 module_pci_driver(sil24_pci_driver); 1360 1361 MODULE_AUTHOR("Tejun Heo"); 1362 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver"); 1363 MODULE_LICENSE("GPL"); 1364 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl); 1365