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 void 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 const 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 .sdev_groups = ata_ncq_sdev_groups, 382 .change_queue_depth = ata_scsi_change_queue_depth, 383 .sdev_configure = ata_scsi_sdev_configure 384 }; 385 386 static struct ata_port_operations sil24_ops = { 387 .inherits = &sata_pmp_port_ops, 388 389 .qc_defer = sil24_qc_defer, 390 .qc_prep = sil24_qc_prep, 391 .qc_issue = sil24_qc_issue, 392 .qc_fill_rtf = sil24_qc_fill_rtf, 393 394 .freeze = sil24_freeze, 395 .thaw = sil24_thaw, 396 .reset.softreset = sil24_softreset, 397 .reset.hardreset = sil24_hardreset, 398 .pmp_reset.softreset = sil24_softreset, 399 .pmp_reset.hardreset = sil24_pmp_hardreset, 400 .error_handler = sil24_error_handler, 401 .post_internal_cmd = sil24_post_internal_cmd, 402 .dev_config = sil24_dev_config, 403 404 .scr_read = sil24_scr_read, 405 .scr_write = sil24_scr_write, 406 .pmp_attach = sil24_pmp_attach, 407 .pmp_detach = sil24_pmp_detach, 408 409 .port_start = sil24_port_start, 410 #ifdef CONFIG_PM 411 .port_resume = sil24_port_resume, 412 #endif 413 }; 414 415 static bool sata_sil24_msi; /* Disable MSI */ 416 module_param_named(msi, sata_sil24_msi, bool, S_IRUGO); 417 MODULE_PARM_DESC(msi, "Enable MSI (Default: false)"); 418 419 /* 420 * Use bits 30-31 of port_flags to encode available port numbers. 421 * Current maxium is 4. 422 */ 423 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30) 424 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1) 425 426 static const struct ata_port_info sil24_port_info[] = { 427 /* sil_3124 */ 428 { 429 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) | 430 SIL24_FLAG_PCIX_IRQ_WOC, 431 .pio_mask = ATA_PIO4, 432 .mwdma_mask = ATA_MWDMA2, 433 .udma_mask = ATA_UDMA5, 434 .port_ops = &sil24_ops, 435 }, 436 /* sil_3132 */ 437 { 438 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2), 439 .pio_mask = ATA_PIO4, 440 .mwdma_mask = ATA_MWDMA2, 441 .udma_mask = ATA_UDMA5, 442 .port_ops = &sil24_ops, 443 }, 444 /* sil_3131/sil_3531 */ 445 { 446 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1), 447 .pio_mask = ATA_PIO4, 448 .mwdma_mask = ATA_MWDMA2, 449 .udma_mask = ATA_UDMA5, 450 .port_ops = &sil24_ops, 451 }, 452 }; 453 454 static int sil24_tag(int tag) 455 { 456 if (unlikely(ata_tag_internal(tag))) 457 return 0; 458 return tag; 459 } 460 461 static unsigned long sil24_port_offset(struct ata_port *ap) 462 { 463 return ap->port_no * PORT_REGS_SIZE; 464 } 465 466 static void __iomem *sil24_port_base(struct ata_port *ap) 467 { 468 return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap); 469 } 470 471 static void sil24_dev_config(struct ata_device *dev) 472 { 473 void __iomem *port = sil24_port_base(dev->link->ap); 474 475 if (dev->cdb_len == 16) 476 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT); 477 else 478 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR); 479 } 480 481 static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf) 482 { 483 void __iomem *port = sil24_port_base(ap); 484 struct sil24_prb __iomem *prb; 485 u8 fis[6 * 4]; 486 487 prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ; 488 memcpy_fromio(fis, prb->fis, sizeof(fis)); 489 ata_tf_from_fis(fis, tf); 490 } 491 492 static int sil24_scr_map[] = { 493 [SCR_CONTROL] = 0, 494 [SCR_STATUS] = 1, 495 [SCR_ERROR] = 2, 496 [SCR_ACTIVE] = 3, 497 }; 498 499 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) 500 { 501 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; 502 503 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 504 *val = readl(scr_addr + sil24_scr_map[sc_reg] * 4); 505 return 0; 506 } 507 return -EINVAL; 508 } 509 510 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) 511 { 512 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; 513 514 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 515 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); 516 return 0; 517 } 518 return -EINVAL; 519 } 520 521 static void sil24_config_port(struct ata_port *ap) 522 { 523 void __iomem *port = sil24_port_base(ap); 524 525 /* configure IRQ WoC */ 526 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 527 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT); 528 else 529 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); 530 531 /* zero error counters. */ 532 writew(0x8000, port + PORT_DECODE_ERR_THRESH); 533 writew(0x8000, port + PORT_CRC_ERR_THRESH); 534 writew(0x8000, port + PORT_HSHK_ERR_THRESH); 535 writew(0x0000, port + PORT_DECODE_ERR_CNT); 536 writew(0x0000, port + PORT_CRC_ERR_CNT); 537 writew(0x0000, port + PORT_HSHK_ERR_CNT); 538 539 /* always use 64bit activation */ 540 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR); 541 542 /* clear port multiplier enable and resume bits */ 543 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 544 } 545 546 static void sil24_config_pmp(struct ata_port *ap, int attached) 547 { 548 void __iomem *port = sil24_port_base(ap); 549 550 if (attached) 551 writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT); 552 else 553 writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR); 554 } 555 556 static void sil24_clear_pmp(struct ata_port *ap) 557 { 558 void __iomem *port = sil24_port_base(ap); 559 int i; 560 561 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 562 563 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { 564 void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE; 565 566 writel(0, pmp_base + PORT_PMP_STATUS); 567 writel(0, pmp_base + PORT_PMP_QACTIVE); 568 } 569 } 570 571 static int sil24_init_port(struct ata_port *ap) 572 { 573 void __iomem *port = sil24_port_base(ap); 574 struct sil24_port_priv *pp = ap->private_data; 575 u32 tmp; 576 577 /* clear PMP error status */ 578 if (sata_pmp_attached(ap)) 579 sil24_clear_pmp(ap); 580 581 writel(PORT_CS_INIT, port + PORT_CTRL_STAT); 582 ata_wait_register(ap, port + PORT_CTRL_STAT, 583 PORT_CS_INIT, PORT_CS_INIT, 10, 100); 584 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 585 PORT_CS_RDY, 0, 10, 100); 586 587 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) { 588 pp->do_port_rst = 1; 589 ap->link.eh_context.i.action |= ATA_EH_RESET; 590 return -EIO; 591 } 592 593 return 0; 594 } 595 596 static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp, 597 const struct ata_taskfile *tf, 598 int is_cmd, u32 ctrl, 599 unsigned int timeout_msec) 600 { 601 void __iomem *port = sil24_port_base(ap); 602 struct sil24_port_priv *pp = ap->private_data; 603 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb; 604 dma_addr_t paddr = pp->cmd_block_dma; 605 u32 irq_enabled, irq_mask, irq_stat; 606 int rc; 607 608 prb->ctrl = cpu_to_le16(ctrl); 609 ata_tf_to_fis(tf, pmp, is_cmd, prb->fis); 610 611 /* temporarily plug completion and error interrupts */ 612 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET); 613 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR); 614 615 /* 616 * The barrier is required to ensure that writes to cmd_block reach 617 * the memory before the write to PORT_CMD_ACTIVATE. 618 */ 619 wmb(); 620 writel((u32)paddr, port + PORT_CMD_ACTIVATE); 621 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); 622 623 irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT; 624 irq_stat = ata_wait_register(ap, port + PORT_IRQ_STAT, irq_mask, 0x0, 625 10, timeout_msec); 626 627 writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */ 628 irq_stat >>= PORT_IRQ_RAW_SHIFT; 629 630 if (irq_stat & PORT_IRQ_COMPLETE) 631 rc = 0; 632 else { 633 /* force port into known state */ 634 sil24_init_port(ap); 635 636 if (irq_stat & PORT_IRQ_ERROR) 637 rc = -EIO; 638 else 639 rc = -EBUSY; 640 } 641 642 /* restore IRQ enabled */ 643 writel(irq_enabled, port + PORT_IRQ_ENABLE_SET); 644 645 return rc; 646 } 647 648 static int sil24_softreset(struct ata_link *link, unsigned int *class, 649 unsigned long deadline) 650 { 651 struct ata_port *ap = link->ap; 652 int pmp = sata_srst_pmp(link); 653 unsigned int timeout_msec = 0; 654 struct ata_taskfile tf; 655 const char *reason; 656 int rc; 657 658 /* put the port into known state */ 659 if (sil24_init_port(ap)) { 660 reason = "port not ready"; 661 goto err; 662 } 663 664 /* do SRST */ 665 if (time_after(deadline, jiffies)) 666 timeout_msec = jiffies_to_msecs(deadline - jiffies); 667 668 ata_tf_init(link->device, &tf); /* doesn't really matter */ 669 rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST, 670 timeout_msec); 671 if (rc == -EBUSY) { 672 reason = "timeout"; 673 goto err; 674 } else if (rc) { 675 reason = "SRST command error"; 676 goto err; 677 } 678 679 sil24_read_tf(ap, 0, &tf); 680 *class = ata_port_classify(ap, &tf); 681 682 return 0; 683 684 err: 685 ata_link_err(link, "softreset failed (%s)\n", reason); 686 return -EIO; 687 } 688 689 static int sil24_hardreset(struct ata_link *link, unsigned int *class, 690 unsigned long deadline) 691 { 692 struct ata_port *ap = link->ap; 693 void __iomem *port = sil24_port_base(ap); 694 struct sil24_port_priv *pp = ap->private_data; 695 int did_port_rst = 0; 696 const char *reason; 697 int tout_msec, rc; 698 u32 tmp; 699 700 retry: 701 /* Sometimes, DEV_RST is not enough to recover the controller. 702 * This happens often after PM DMA CS errata. 703 */ 704 if (pp->do_port_rst) { 705 ata_port_warn(ap, 706 "controller in dubious state, performing PORT_RST\n"); 707 708 writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT); 709 ata_msleep(ap, 10); 710 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 711 ata_wait_register(ap, port + PORT_CTRL_STAT, PORT_CS_RDY, 0, 712 10, 5000); 713 714 /* restore port configuration */ 715 sil24_config_port(ap); 716 sil24_config_pmp(ap, ap->nr_pmp_links); 717 718 pp->do_port_rst = 0; 719 did_port_rst = 1; 720 } 721 722 /* sil24 does the right thing(tm) without any protection */ 723 sata_set_spd(link); 724 725 tout_msec = 100; 726 if (ata_link_online(link)) 727 tout_msec = 5000; 728 729 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); 730 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 731 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10, 732 tout_msec); 733 734 /* SStatus oscillates between zero and valid status after 735 * DEV_RST, debounce it. 736 */ 737 rc = sata_link_debounce(link, sata_deb_timing_long, deadline); 738 if (rc) { 739 reason = "PHY debouncing failed"; 740 goto err; 741 } 742 743 if (tmp & PORT_CS_DEV_RST) { 744 if (ata_link_offline(link)) 745 return 0; 746 reason = "link not ready"; 747 goto err; 748 } 749 750 /* Sil24 doesn't store signature FIS after hardreset, so we 751 * can't wait for BSY to clear. Some devices take a long time 752 * to get ready and those devices will choke if we don't wait 753 * for BSY clearance here. Tell libata to perform follow-up 754 * softreset. 755 */ 756 return -EAGAIN; 757 758 err: 759 if (!did_port_rst) { 760 pp->do_port_rst = 1; 761 goto retry; 762 } 763 764 ata_link_err(link, "hardreset failed (%s)\n", reason); 765 return -EIO; 766 } 767 768 static inline void sil24_fill_sg(struct ata_queued_cmd *qc, 769 struct sil24_sge *sge) 770 { 771 struct scatterlist *sg; 772 struct sil24_sge *last_sge = NULL; 773 unsigned int si; 774 775 for_each_sg(qc->sg, sg, qc->n_elem, si) { 776 sge->addr = cpu_to_le64(sg_dma_address(sg)); 777 sge->cnt = cpu_to_le32(sg_dma_len(sg)); 778 sge->flags = 0; 779 780 last_sge = sge; 781 sge++; 782 } 783 784 last_sge->flags = cpu_to_le32(SGE_TRM); 785 } 786 787 static int sil24_qc_defer(struct ata_queued_cmd *qc) 788 { 789 struct ata_link *link = qc->dev->link; 790 struct ata_port *ap = link->ap; 791 u8 prot = qc->tf.protocol; 792 int ret; 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 ret = ata_std_qc_defer(qc); 831 if (ret == ATA_DEFER_LINK) 832 return ATA_DEFER_LINK_EXCL; 833 return ret; 834 } 835 836 static enum ata_completion_errors sil24_qc_prep(struct ata_queued_cmd *qc) 837 { 838 struct ata_port *ap = qc->ap; 839 struct sil24_port_priv *pp = ap->private_data; 840 union sil24_cmd_block *cb; 841 struct sil24_prb *prb; 842 struct sil24_sge *sge; 843 u16 ctrl = 0; 844 845 cb = &pp->cmd_block[sil24_tag(qc->hw_tag)]; 846 847 if (!ata_is_atapi(qc->tf.protocol)) { 848 prb = &cb->ata.prb; 849 sge = cb->ata.sge; 850 if (ata_is_data(qc->tf.protocol)) { 851 u16 prot = 0; 852 ctrl = PRB_CTRL_PROTOCOL; 853 if (ata_is_ncq(qc->tf.protocol)) 854 prot |= PRB_PROT_NCQ; 855 if (qc->tf.flags & ATA_TFLAG_WRITE) 856 prot |= PRB_PROT_WRITE; 857 else 858 prot |= PRB_PROT_READ; 859 prb->prot = cpu_to_le16(prot); 860 } 861 } else { 862 prb = &cb->atapi.prb; 863 sge = cb->atapi.sge; 864 memset(cb->atapi.cdb, 0, sizeof(cb->atapi.cdb)); 865 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len); 866 867 if (ata_is_data(qc->tf.protocol)) { 868 if (qc->tf.flags & ATA_TFLAG_WRITE) 869 ctrl = PRB_CTRL_PACKET_WRITE; 870 else 871 ctrl = PRB_CTRL_PACKET_READ; 872 } 873 } 874 875 prb->ctrl = cpu_to_le16(ctrl); 876 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis); 877 878 if (qc->flags & ATA_QCFLAG_DMAMAP) 879 sil24_fill_sg(qc, sge); 880 881 return AC_ERR_OK; 882 } 883 884 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc) 885 { 886 struct ata_port *ap = qc->ap; 887 struct sil24_port_priv *pp = ap->private_data; 888 void __iomem *port = sil24_port_base(ap); 889 unsigned int tag = sil24_tag(qc->hw_tag); 890 dma_addr_t paddr; 891 void __iomem *activate; 892 893 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block); 894 activate = port + PORT_CMD_ACTIVATE + tag * 8; 895 896 /* 897 * The barrier is required to ensure that writes to cmd_block reach 898 * the memory before the write to PORT_CMD_ACTIVATE. 899 */ 900 wmb(); 901 writel((u32)paddr, activate); 902 writel((u64)paddr >> 32, activate + 4); 903 904 return 0; 905 } 906 907 static void sil24_qc_fill_rtf(struct ata_queued_cmd *qc) 908 { 909 sil24_read_tf(qc->ap, qc->hw_tag, &qc->result_tf); 910 } 911 912 static void sil24_pmp_attach(struct ata_port *ap) 913 { 914 u32 *gscr = ap->link.device->gscr; 915 916 sil24_config_pmp(ap, 1); 917 sil24_init_port(ap); 918 919 if (sata_pmp_gscr_vendor(gscr) == 0x11ab && 920 sata_pmp_gscr_devid(gscr) == 0x4140) { 921 ata_port_info(ap, 922 "disabling NCQ support due to sil24-mv4140 quirk\n"); 923 ap->flags &= ~ATA_FLAG_NCQ; 924 } 925 } 926 927 static void sil24_pmp_detach(struct ata_port *ap) 928 { 929 sil24_init_port(ap); 930 sil24_config_pmp(ap, 0); 931 932 ap->flags |= ATA_FLAG_NCQ; 933 } 934 935 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, 936 unsigned long deadline) 937 { 938 int rc; 939 940 rc = sil24_init_port(link->ap); 941 if (rc) { 942 ata_link_err(link, "hardreset failed (port not ready)\n"); 943 return rc; 944 } 945 946 return sata_std_hardreset(link, class, deadline); 947 } 948 949 static void sil24_freeze(struct ata_port *ap) 950 { 951 void __iomem *port = sil24_port_base(ap); 952 953 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear 954 * PORT_IRQ_ENABLE instead. 955 */ 956 writel(0xffff, port + PORT_IRQ_ENABLE_CLR); 957 } 958 959 static void sil24_thaw(struct ata_port *ap) 960 { 961 void __iomem *port = sil24_port_base(ap); 962 u32 tmp; 963 964 /* clear IRQ */ 965 tmp = readl(port + PORT_IRQ_STAT); 966 writel(tmp, port + PORT_IRQ_STAT); 967 968 /* turn IRQ back on */ 969 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET); 970 } 971 972 static void sil24_error_intr(struct ata_port *ap) 973 { 974 void __iomem *port = sil24_port_base(ap); 975 struct sil24_port_priv *pp = ap->private_data; 976 struct ata_queued_cmd *qc = NULL; 977 struct ata_link *link; 978 struct ata_eh_info *ehi; 979 int abort = 0, freeze = 0; 980 u32 irq_stat; 981 982 /* on error, we need to clear IRQ explicitly */ 983 irq_stat = readl(port + PORT_IRQ_STAT); 984 writel(irq_stat, port + PORT_IRQ_STAT); 985 986 /* first, analyze and record host port events */ 987 link = &ap->link; 988 ehi = &link->eh_info; 989 ata_ehi_clear_desc(ehi); 990 991 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); 992 993 if (irq_stat & PORT_IRQ_SDB_NOTIFY) { 994 ata_ehi_push_desc(ehi, "SDB notify"); 995 sata_async_notification(ap); 996 } 997 998 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) { 999 ata_ehi_hotplugged(ehi); 1000 ata_ehi_push_desc(ehi, "%s", 1001 irq_stat & PORT_IRQ_PHYRDY_CHG ? 1002 "PHY RDY changed" : "device exchanged"); 1003 freeze = 1; 1004 } 1005 1006 if (irq_stat & PORT_IRQ_UNK_FIS) { 1007 ehi->err_mask |= AC_ERR_HSM; 1008 ehi->action |= ATA_EH_RESET; 1009 ata_ehi_push_desc(ehi, "unknown FIS"); 1010 freeze = 1; 1011 } 1012 1013 /* deal with command error */ 1014 if (irq_stat & PORT_IRQ_ERROR) { 1015 const struct sil24_cerr_info *ci = NULL; 1016 unsigned int err_mask = 0, action = 0; 1017 u32 context, cerr; 1018 int pmp; 1019 1020 abort = 1; 1021 1022 /* DMA Context Switch Failure in Port Multiplier Mode 1023 * errata. If we have active commands to 3 or more 1024 * devices, any error condition on active devices can 1025 * corrupt DMA context switching. 1026 */ 1027 if (ap->nr_active_links >= 3) { 1028 ehi->err_mask |= AC_ERR_OTHER; 1029 ehi->action |= ATA_EH_RESET; 1030 ata_ehi_push_desc(ehi, "PMP DMA CS errata"); 1031 pp->do_port_rst = 1; 1032 freeze = 1; 1033 } 1034 1035 /* find out the offending link and qc */ 1036 if (sata_pmp_attached(ap)) { 1037 context = readl(port + PORT_CONTEXT); 1038 pmp = (context >> 5) & 0xf; 1039 1040 if (pmp < ap->nr_pmp_links) { 1041 link = &ap->pmp_link[pmp]; 1042 ehi = &link->eh_info; 1043 qc = ata_qc_from_tag(ap, link->active_tag); 1044 1045 ata_ehi_clear_desc(ehi); 1046 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", 1047 irq_stat); 1048 } else { 1049 err_mask |= AC_ERR_HSM; 1050 action |= ATA_EH_RESET; 1051 freeze = 1; 1052 } 1053 } else 1054 qc = ata_qc_from_tag(ap, link->active_tag); 1055 1056 /* analyze CMD_ERR */ 1057 cerr = readl(port + PORT_CMD_ERR); 1058 if (cerr < ARRAY_SIZE(sil24_cerr_db)) 1059 ci = &sil24_cerr_db[cerr]; 1060 1061 if (ci && ci->desc) { 1062 err_mask |= ci->err_mask; 1063 action |= ci->action; 1064 if (action & ATA_EH_RESET) 1065 freeze = 1; 1066 ata_ehi_push_desc(ehi, "%s", ci->desc); 1067 } else { 1068 err_mask |= AC_ERR_OTHER; 1069 action |= ATA_EH_RESET; 1070 freeze = 1; 1071 ata_ehi_push_desc(ehi, "unknown command error %d", 1072 cerr); 1073 } 1074 1075 /* record error info */ 1076 if (qc) 1077 qc->err_mask |= err_mask; 1078 else 1079 ehi->err_mask |= err_mask; 1080 1081 ehi->action |= action; 1082 1083 /* if PMP, resume */ 1084 if (sata_pmp_attached(ap)) 1085 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT); 1086 } 1087 1088 /* freeze or abort */ 1089 if (freeze) 1090 ata_port_freeze(ap); 1091 else if (abort) { 1092 if (qc) 1093 ata_link_abort(qc->dev->link); 1094 else 1095 ata_port_abort(ap); 1096 } 1097 } 1098 1099 static inline void sil24_host_intr(struct ata_port *ap) 1100 { 1101 void __iomem *port = sil24_port_base(ap); 1102 u32 slot_stat, qc_active; 1103 int rc; 1104 1105 /* If PCIX_IRQ_WOC, there's an inherent race window between 1106 * clearing IRQ pending status and reading PORT_SLOT_STAT 1107 * which may cause spurious interrupts afterwards. This is 1108 * unavoidable and much better than losing interrupts which 1109 * happens if IRQ pending is cleared after reading 1110 * PORT_SLOT_STAT. 1111 */ 1112 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 1113 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT); 1114 1115 slot_stat = readl(port + PORT_SLOT_STAT); 1116 1117 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) { 1118 sil24_error_intr(ap); 1119 return; 1120 } 1121 1122 qc_active = slot_stat & ~HOST_SSTAT_ATTN; 1123 rc = ata_qc_complete_multiple(ap, qc_active); 1124 if (rc > 0) 1125 return; 1126 if (rc < 0) { 1127 struct ata_eh_info *ehi = &ap->link.eh_info; 1128 ehi->err_mask |= AC_ERR_HSM; 1129 ehi->action |= ATA_EH_RESET; 1130 ata_port_freeze(ap); 1131 return; 1132 } 1133 1134 /* spurious interrupts are expected if PCIX_IRQ_WOC */ 1135 if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit()) 1136 ata_port_info(ap, 1137 "spurious interrupt (slot_stat 0x%x active_tag %d sactive 0x%x)\n", 1138 slot_stat, ap->link.active_tag, ap->link.sactive); 1139 } 1140 1141 static irqreturn_t sil24_interrupt(int irq, void *dev_instance) 1142 { 1143 struct ata_host *host = dev_instance; 1144 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1145 unsigned handled = 0; 1146 u32 status; 1147 int i; 1148 1149 status = readl(host_base + HOST_IRQ_STAT); 1150 1151 if (status == 0xffffffff) { 1152 dev_err(host->dev, "IRQ status == 0xffffffff, " 1153 "PCI fault or device removal?\n"); 1154 goto out; 1155 } 1156 1157 if (!(status & IRQ_STAT_4PORTS)) 1158 goto out; 1159 1160 spin_lock(&host->lock); 1161 1162 for (i = 0; i < host->n_ports; i++) 1163 if (status & (1 << i)) { 1164 sil24_host_intr(host->ports[i]); 1165 handled++; 1166 } 1167 1168 spin_unlock(&host->lock); 1169 out: 1170 return IRQ_RETVAL(handled); 1171 } 1172 1173 static void sil24_error_handler(struct ata_port *ap) 1174 { 1175 struct sil24_port_priv *pp = ap->private_data; 1176 1177 if (sil24_init_port(ap)) 1178 ata_eh_freeze_port(ap); 1179 1180 sata_pmp_error_handler(ap); 1181 1182 pp->do_port_rst = 0; 1183 } 1184 1185 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) 1186 { 1187 struct ata_port *ap = qc->ap; 1188 1189 /* make DMA engine forget about the failed command */ 1190 if ((qc->flags & ATA_QCFLAG_EH) && sil24_init_port(ap)) 1191 ata_eh_freeze_port(ap); 1192 } 1193 1194 static int sil24_port_start(struct ata_port *ap) 1195 { 1196 struct device *dev = ap->host->dev; 1197 struct sil24_port_priv *pp; 1198 union sil24_cmd_block *cb; 1199 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS; 1200 dma_addr_t cb_dma; 1201 1202 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 1203 if (!pp) 1204 return -ENOMEM; 1205 1206 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); 1207 if (!cb) 1208 return -ENOMEM; 1209 1210 pp->cmd_block = cb; 1211 pp->cmd_block_dma = cb_dma; 1212 1213 ap->private_data = pp; 1214 1215 ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host"); 1216 ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port"); 1217 1218 return 0; 1219 } 1220 1221 static void sil24_init_controller(struct ata_host *host) 1222 { 1223 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1224 u32 tmp; 1225 int i; 1226 1227 /* GPIO off */ 1228 writel(0, host_base + HOST_FLASH_CMD); 1229 1230 /* clear global reset & mask interrupts during initialization */ 1231 writel(0, host_base + HOST_CTRL); 1232 1233 /* init ports */ 1234 for (i = 0; i < host->n_ports; i++) { 1235 struct ata_port *ap = host->ports[i]; 1236 void __iomem *port = sil24_port_base(ap); 1237 1238 1239 /* Initial PHY setting */ 1240 writel(0x20c, port + PORT_PHY_CFG); 1241 1242 /* Clear port RST */ 1243 tmp = readl(port + PORT_CTRL_STAT); 1244 if (tmp & PORT_CS_PORT_RST) { 1245 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 1246 tmp = ata_wait_register(NULL, port + PORT_CTRL_STAT, 1247 PORT_CS_PORT_RST, 1248 PORT_CS_PORT_RST, 10, 100); 1249 if (tmp & PORT_CS_PORT_RST) 1250 dev_err(host->dev, 1251 "failed to clear port RST\n"); 1252 } 1253 1254 /* configure port */ 1255 sil24_config_port(ap); 1256 } 1257 1258 /* Turn on interrupts */ 1259 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL); 1260 } 1261 1262 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 1263 { 1264 extern int __MARKER__sil24_cmd_block_is_sized_wrongly; 1265 struct ata_port_info pi = sil24_port_info[ent->driver_data]; 1266 const struct ata_port_info *ppi[] = { &pi, NULL }; 1267 void __iomem * const *iomap; 1268 struct ata_host *host; 1269 int rc; 1270 u32 tmp; 1271 1272 /* cause link error if sil24_cmd_block is sized wrongly */ 1273 if (sizeof(union sil24_cmd_block) != PAGE_SIZE) 1274 __MARKER__sil24_cmd_block_is_sized_wrongly = 1; 1275 1276 ata_print_version_once(&pdev->dev, DRV_VERSION); 1277 1278 /* acquire resources */ 1279 rc = pcim_enable_device(pdev); 1280 if (rc) 1281 return rc; 1282 1283 rc = pcim_iomap_regions(pdev, 1284 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR), 1285 DRV_NAME); 1286 if (rc) 1287 return rc; 1288 iomap = pcim_iomap_table(pdev); 1289 1290 /* apply workaround for completion IRQ loss on PCI-X errata */ 1291 if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) { 1292 tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL); 1293 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL)) 1294 dev_info(&pdev->dev, 1295 "Applying completion IRQ loss on PCI-X errata fix\n"); 1296 else 1297 pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC; 1298 } 1299 1300 /* allocate and fill host */ 1301 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1302 SIL24_FLAG2NPORTS(ppi[0]->flags)); 1303 if (!host) 1304 return -ENOMEM; 1305 host->iomap = iomap; 1306 1307 /* configure and activate the device */ 1308 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 1309 if (rc) { 1310 dev_err(&pdev->dev, "DMA enable failed\n"); 1311 return rc; 1312 } 1313 1314 /* Set max read request size to 4096. This slightly increases 1315 * write throughput for pci-e variants. 1316 */ 1317 pcie_set_readrq(pdev, 4096); 1318 1319 sil24_init_controller(host); 1320 1321 if (sata_sil24_msi && !pci_enable_msi(pdev)) { 1322 dev_info(&pdev->dev, "Using MSI\n"); 1323 pcim_intx(pdev, 0); 1324 } 1325 1326 pci_set_master(pdev); 1327 return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED, 1328 &sil24_sht); 1329 } 1330 1331 #ifdef CONFIG_PM_SLEEP 1332 static int sil24_pci_device_resume(struct pci_dev *pdev) 1333 { 1334 struct ata_host *host = pci_get_drvdata(pdev); 1335 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1336 int rc; 1337 1338 rc = ata_pci_device_do_resume(pdev); 1339 if (rc) 1340 return rc; 1341 1342 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) 1343 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL); 1344 1345 sil24_init_controller(host); 1346 1347 ata_host_resume(host); 1348 1349 return 0; 1350 } 1351 #endif 1352 1353 #ifdef CONFIG_PM 1354 static int sil24_port_resume(struct ata_port *ap) 1355 { 1356 sil24_config_pmp(ap, ap->nr_pmp_links); 1357 return 0; 1358 } 1359 #endif 1360 1361 module_pci_driver(sil24_pci_driver); 1362 1363 MODULE_AUTHOR("Tejun Heo"); 1364 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver"); 1365 MODULE_LICENSE("GPL"); 1366 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl); 1367