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, 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 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 357 static int sil24_pci_device_resume(struct pci_dev *pdev); 358 static int sil24_port_resume(struct ata_port *ap); 359 #endif 360 361 static const struct pci_device_id sil24_pci_tbl[] = { 362 { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 }, 363 { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 }, 364 { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 }, 365 { PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 }, 366 { PCI_VDEVICE(CMD, 0x0244), BID_SIL3132 }, 367 { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 }, 368 { PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 }, 369 370 { } /* terminate list */ 371 }; 372 373 static struct pci_driver sil24_pci_driver = { 374 .name = DRV_NAME, 375 .id_table = sil24_pci_tbl, 376 .probe = sil24_init_one, 377 .remove = ata_pci_remove_one, 378 #ifdef CONFIG_PM 379 .suspend = ata_pci_device_suspend, 380 .resume = sil24_pci_device_resume, 381 #endif 382 }; 383 384 static struct scsi_host_template sil24_sht = { 385 ATA_NCQ_SHT(DRV_NAME), 386 .can_queue = SIL24_MAX_CMDS, 387 .sg_tablesize = SIL24_MAX_SGE, 388 .dma_boundary = ATA_DMA_BOUNDARY, 389 }; 390 391 static struct ata_port_operations sil24_ops = { 392 .inherits = &sata_pmp_port_ops, 393 394 .qc_defer = sil24_qc_defer, 395 .qc_prep = sil24_qc_prep, 396 .qc_issue = sil24_qc_issue, 397 .qc_fill_rtf = sil24_qc_fill_rtf, 398 399 .freeze = sil24_freeze, 400 .thaw = sil24_thaw, 401 .softreset = sil24_softreset, 402 .hardreset = sil24_hardreset, 403 .pmp_softreset = sil24_softreset, 404 .pmp_hardreset = sil24_pmp_hardreset, 405 .error_handler = sil24_error_handler, 406 .post_internal_cmd = sil24_post_internal_cmd, 407 .dev_config = sil24_dev_config, 408 409 .scr_read = sil24_scr_read, 410 .scr_write = sil24_scr_write, 411 .pmp_attach = sil24_pmp_attach, 412 .pmp_detach = sil24_pmp_detach, 413 414 .port_start = sil24_port_start, 415 #ifdef CONFIG_PM 416 .port_resume = sil24_port_resume, 417 #endif 418 }; 419 420 static int sata_sil24_msi; /* Disable MSI */ 421 module_param_named(msi, sata_sil24_msi, bool, S_IRUGO); 422 MODULE_PARM_DESC(msi, "Enable MSI (Default: false)"); 423 424 /* 425 * Use bits 30-31 of port_flags to encode available port numbers. 426 * Current maxium is 4. 427 */ 428 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30) 429 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1) 430 431 static const struct ata_port_info sil24_port_info[] = { 432 /* sil_3124 */ 433 { 434 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) | 435 SIL24_FLAG_PCIX_IRQ_WOC, 436 .pio_mask = ATA_PIO4, 437 .mwdma_mask = ATA_MWDMA2, 438 .udma_mask = ATA_UDMA5, 439 .port_ops = &sil24_ops, 440 }, 441 /* sil_3132 */ 442 { 443 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2), 444 .pio_mask = ATA_PIO4, 445 .mwdma_mask = ATA_MWDMA2, 446 .udma_mask = ATA_UDMA5, 447 .port_ops = &sil24_ops, 448 }, 449 /* sil_3131/sil_3531 */ 450 { 451 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1), 452 .pio_mask = ATA_PIO4, 453 .mwdma_mask = ATA_MWDMA2, 454 .udma_mask = ATA_UDMA5, 455 .port_ops = &sil24_ops, 456 }, 457 }; 458 459 static int sil24_tag(int tag) 460 { 461 if (unlikely(ata_tag_internal(tag))) 462 return 0; 463 return tag; 464 } 465 466 static unsigned long sil24_port_offset(struct ata_port *ap) 467 { 468 return ap->port_no * PORT_REGS_SIZE; 469 } 470 471 static void __iomem *sil24_port_base(struct ata_port *ap) 472 { 473 return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap); 474 } 475 476 static void sil24_dev_config(struct ata_device *dev) 477 { 478 void __iomem *port = sil24_port_base(dev->link->ap); 479 480 if (dev->cdb_len == 16) 481 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT); 482 else 483 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR); 484 } 485 486 static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf) 487 { 488 void __iomem *port = sil24_port_base(ap); 489 struct sil24_prb __iomem *prb; 490 u8 fis[6 * 4]; 491 492 prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ; 493 memcpy_fromio(fis, prb->fis, sizeof(fis)); 494 ata_tf_from_fis(fis, tf); 495 } 496 497 static int sil24_scr_map[] = { 498 [SCR_CONTROL] = 0, 499 [SCR_STATUS] = 1, 500 [SCR_ERROR] = 2, 501 [SCR_ACTIVE] = 3, 502 }; 503 504 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) 505 { 506 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; 507 508 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 509 void __iomem *addr; 510 addr = scr_addr + sil24_scr_map[sc_reg] * 4; 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 void __iomem *addr; 523 addr = scr_addr + sil24_scr_map[sc_reg] * 4; 524 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); 525 return 0; 526 } 527 return -EINVAL; 528 } 529 530 static void sil24_config_port(struct ata_port *ap) 531 { 532 void __iomem *port = sil24_port_base(ap); 533 534 /* configure IRQ WoC */ 535 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 536 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT); 537 else 538 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); 539 540 /* zero error counters. */ 541 writew(0x8000, port + PORT_DECODE_ERR_THRESH); 542 writew(0x8000, port + PORT_CRC_ERR_THRESH); 543 writew(0x8000, port + PORT_HSHK_ERR_THRESH); 544 writew(0x0000, port + PORT_DECODE_ERR_CNT); 545 writew(0x0000, port + PORT_CRC_ERR_CNT); 546 writew(0x0000, port + PORT_HSHK_ERR_CNT); 547 548 /* always use 64bit activation */ 549 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR); 550 551 /* clear port multiplier enable and resume bits */ 552 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 553 } 554 555 static void sil24_config_pmp(struct ata_port *ap, int attached) 556 { 557 void __iomem *port = sil24_port_base(ap); 558 559 if (attached) 560 writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT); 561 else 562 writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR); 563 } 564 565 static void sil24_clear_pmp(struct ata_port *ap) 566 { 567 void __iomem *port = sil24_port_base(ap); 568 int i; 569 570 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); 571 572 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { 573 void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE; 574 575 writel(0, pmp_base + PORT_PMP_STATUS); 576 writel(0, pmp_base + PORT_PMP_QACTIVE); 577 } 578 } 579 580 static int sil24_init_port(struct ata_port *ap) 581 { 582 void __iomem *port = sil24_port_base(ap); 583 struct sil24_port_priv *pp = ap->private_data; 584 u32 tmp; 585 586 /* clear PMP error status */ 587 if (sata_pmp_attached(ap)) 588 sil24_clear_pmp(ap); 589 590 writel(PORT_CS_INIT, port + PORT_CTRL_STAT); 591 ata_wait_register(ap, port + PORT_CTRL_STAT, 592 PORT_CS_INIT, PORT_CS_INIT, 10, 100); 593 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 594 PORT_CS_RDY, 0, 10, 100); 595 596 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) { 597 pp->do_port_rst = 1; 598 ap->link.eh_context.i.action |= ATA_EH_RESET; 599 return -EIO; 600 } 601 602 return 0; 603 } 604 605 static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp, 606 const struct ata_taskfile *tf, 607 int is_cmd, u32 ctrl, 608 unsigned long timeout_msec) 609 { 610 void __iomem *port = sil24_port_base(ap); 611 struct sil24_port_priv *pp = ap->private_data; 612 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb; 613 dma_addr_t paddr = pp->cmd_block_dma; 614 u32 irq_enabled, irq_mask, irq_stat; 615 int rc; 616 617 prb->ctrl = cpu_to_le16(ctrl); 618 ata_tf_to_fis(tf, pmp, is_cmd, prb->fis); 619 620 /* temporarily plug completion and error interrupts */ 621 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET); 622 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR); 623 624 /* 625 * The barrier is required to ensure that writes to cmd_block reach 626 * the memory before the write to PORT_CMD_ACTIVATE. 627 */ 628 wmb(); 629 writel((u32)paddr, port + PORT_CMD_ACTIVATE); 630 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); 631 632 irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT; 633 irq_stat = ata_wait_register(ap, port + PORT_IRQ_STAT, irq_mask, 0x0, 634 10, timeout_msec); 635 636 writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */ 637 irq_stat >>= PORT_IRQ_RAW_SHIFT; 638 639 if (irq_stat & PORT_IRQ_COMPLETE) 640 rc = 0; 641 else { 642 /* force port into known state */ 643 sil24_init_port(ap); 644 645 if (irq_stat & PORT_IRQ_ERROR) 646 rc = -EIO; 647 else 648 rc = -EBUSY; 649 } 650 651 /* restore IRQ enabled */ 652 writel(irq_enabled, port + PORT_IRQ_ENABLE_SET); 653 654 return rc; 655 } 656 657 static int sil24_softreset(struct ata_link *link, unsigned int *class, 658 unsigned long deadline) 659 { 660 struct ata_port *ap = link->ap; 661 int pmp = sata_srst_pmp(link); 662 unsigned long timeout_msec = 0; 663 struct ata_taskfile tf; 664 const char *reason; 665 int rc; 666 667 DPRINTK("ENTER\n"); 668 669 /* put the port into known state */ 670 if (sil24_init_port(ap)) { 671 reason = "port not ready"; 672 goto err; 673 } 674 675 /* do SRST */ 676 if (time_after(deadline, jiffies)) 677 timeout_msec = jiffies_to_msecs(deadline - jiffies); 678 679 ata_tf_init(link->device, &tf); /* doesn't really matter */ 680 rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST, 681 timeout_msec); 682 if (rc == -EBUSY) { 683 reason = "timeout"; 684 goto err; 685 } else if (rc) { 686 reason = "SRST command error"; 687 goto err; 688 } 689 690 sil24_read_tf(ap, 0, &tf); 691 *class = ata_dev_classify(&tf); 692 693 DPRINTK("EXIT, class=%u\n", *class); 694 return 0; 695 696 err: 697 ata_link_err(link, "softreset failed (%s)\n", reason); 698 return -EIO; 699 } 700 701 static int sil24_hardreset(struct ata_link *link, unsigned int *class, 702 unsigned long deadline) 703 { 704 struct ata_port *ap = link->ap; 705 void __iomem *port = sil24_port_base(ap); 706 struct sil24_port_priv *pp = ap->private_data; 707 int did_port_rst = 0; 708 const char *reason; 709 int tout_msec, rc; 710 u32 tmp; 711 712 retry: 713 /* Sometimes, DEV_RST is not enough to recover the controller. 714 * This happens often after PM DMA CS errata. 715 */ 716 if (pp->do_port_rst) { 717 ata_port_warn(ap, 718 "controller in dubious state, performing PORT_RST\n"); 719 720 writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT); 721 ata_msleep(ap, 10); 722 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 723 ata_wait_register(ap, port + PORT_CTRL_STAT, PORT_CS_RDY, 0, 724 10, 5000); 725 726 /* restore port configuration */ 727 sil24_config_port(ap); 728 sil24_config_pmp(ap, ap->nr_pmp_links); 729 730 pp->do_port_rst = 0; 731 did_port_rst = 1; 732 } 733 734 /* sil24 does the right thing(tm) without any protection */ 735 sata_set_spd(link); 736 737 tout_msec = 100; 738 if (ata_link_online(link)) 739 tout_msec = 5000; 740 741 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); 742 tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, 743 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10, 744 tout_msec); 745 746 /* SStatus oscillates between zero and valid status after 747 * DEV_RST, debounce it. 748 */ 749 rc = sata_link_debounce(link, sata_deb_timing_long, deadline); 750 if (rc) { 751 reason = "PHY debouncing failed"; 752 goto err; 753 } 754 755 if (tmp & PORT_CS_DEV_RST) { 756 if (ata_link_offline(link)) 757 return 0; 758 reason = "link not ready"; 759 goto err; 760 } 761 762 /* Sil24 doesn't store signature FIS after hardreset, so we 763 * can't wait for BSY to clear. Some devices take a long time 764 * to get ready and those devices will choke if we don't wait 765 * for BSY clearance here. Tell libata to perform follow-up 766 * softreset. 767 */ 768 return -EAGAIN; 769 770 err: 771 if (!did_port_rst) { 772 pp->do_port_rst = 1; 773 goto retry; 774 } 775 776 ata_link_err(link, "hardreset failed (%s)\n", reason); 777 return -EIO; 778 } 779 780 static inline void sil24_fill_sg(struct ata_queued_cmd *qc, 781 struct sil24_sge *sge) 782 { 783 struct scatterlist *sg; 784 struct sil24_sge *last_sge = NULL; 785 unsigned int si; 786 787 for_each_sg(qc->sg, sg, qc->n_elem, si) { 788 sge->addr = cpu_to_le64(sg_dma_address(sg)); 789 sge->cnt = cpu_to_le32(sg_dma_len(sg)); 790 sge->flags = 0; 791 792 last_sge = sge; 793 sge++; 794 } 795 796 last_sge->flags = cpu_to_le32(SGE_TRM); 797 } 798 799 static int sil24_qc_defer(struct ata_queued_cmd *qc) 800 { 801 struct ata_link *link = qc->dev->link; 802 struct ata_port *ap = link->ap; 803 u8 prot = qc->tf.protocol; 804 805 /* 806 * There is a bug in the chip: 807 * Port LRAM Causes the PRB/SGT Data to be Corrupted 808 * If the host issues a read request for LRAM and SActive registers 809 * while active commands are available in the port, PRB/SGT data in 810 * the LRAM can become corrupted. This issue applies only when 811 * reading from, but not writing to, the LRAM. 812 * 813 * Therefore, reading LRAM when there is no particular error [and 814 * other commands may be outstanding] is prohibited. 815 * 816 * To avoid this bug there are two situations where a command must run 817 * exclusive of any other commands on the port: 818 * 819 * - ATAPI commands which check the sense data 820 * - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF 821 * set. 822 * 823 */ 824 int is_excl = (ata_is_atapi(prot) || 825 (qc->flags & ATA_QCFLAG_RESULT_TF)); 826 827 if (unlikely(ap->excl_link)) { 828 if (link == ap->excl_link) { 829 if (ap->nr_active_links) 830 return ATA_DEFER_PORT; 831 qc->flags |= ATA_QCFLAG_CLEAR_EXCL; 832 } else 833 return ATA_DEFER_PORT; 834 } else if (unlikely(is_excl)) { 835 ap->excl_link = link; 836 if (ap->nr_active_links) 837 return ATA_DEFER_PORT; 838 qc->flags |= ATA_QCFLAG_CLEAR_EXCL; 839 } 840 841 return ata_std_qc_defer(qc); 842 } 843 844 static void sil24_qc_prep(struct ata_queued_cmd *qc) 845 { 846 struct ata_port *ap = qc->ap; 847 struct sil24_port_priv *pp = ap->private_data; 848 union sil24_cmd_block *cb; 849 struct sil24_prb *prb; 850 struct sil24_sge *sge; 851 u16 ctrl = 0; 852 853 cb = &pp->cmd_block[sil24_tag(qc->tag)]; 854 855 if (!ata_is_atapi(qc->tf.protocol)) { 856 prb = &cb->ata.prb; 857 sge = cb->ata.sge; 858 if (ata_is_data(qc->tf.protocol)) { 859 u16 prot = 0; 860 ctrl = PRB_CTRL_PROTOCOL; 861 if (ata_is_ncq(qc->tf.protocol)) 862 prot |= PRB_PROT_NCQ; 863 if (qc->tf.flags & ATA_TFLAG_WRITE) 864 prot |= PRB_PROT_WRITE; 865 else 866 prot |= PRB_PROT_READ; 867 prb->prot = cpu_to_le16(prot); 868 } 869 } else { 870 prb = &cb->atapi.prb; 871 sge = cb->atapi.sge; 872 memset(cb->atapi.cdb, 0, sizeof(cb->atapi.cdb)); 873 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len); 874 875 if (ata_is_data(qc->tf.protocol)) { 876 if (qc->tf.flags & ATA_TFLAG_WRITE) 877 ctrl = PRB_CTRL_PACKET_WRITE; 878 else 879 ctrl = PRB_CTRL_PACKET_READ; 880 } 881 } 882 883 prb->ctrl = cpu_to_le16(ctrl); 884 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis); 885 886 if (qc->flags & ATA_QCFLAG_DMAMAP) 887 sil24_fill_sg(qc, sge); 888 } 889 890 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc) 891 { 892 struct ata_port *ap = qc->ap; 893 struct sil24_port_priv *pp = ap->private_data; 894 void __iomem *port = sil24_port_base(ap); 895 unsigned int tag = sil24_tag(qc->tag); 896 dma_addr_t paddr; 897 void __iomem *activate; 898 899 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block); 900 activate = port + PORT_CMD_ACTIVATE + tag * 8; 901 902 /* 903 * The barrier is required to ensure that writes to cmd_block reach 904 * the memory before the write to PORT_CMD_ACTIVATE. 905 */ 906 wmb(); 907 writel((u32)paddr, activate); 908 writel((u64)paddr >> 32, activate + 4); 909 910 return 0; 911 } 912 913 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc) 914 { 915 sil24_read_tf(qc->ap, qc->tag, &qc->result_tf); 916 return true; 917 } 918 919 static void sil24_pmp_attach(struct ata_port *ap) 920 { 921 u32 *gscr = ap->link.device->gscr; 922 923 sil24_config_pmp(ap, 1); 924 sil24_init_port(ap); 925 926 if (sata_pmp_gscr_vendor(gscr) == 0x11ab && 927 sata_pmp_gscr_devid(gscr) == 0x4140) { 928 ata_port_info(ap, 929 "disabling NCQ support due to sil24-mv4140 quirk\n"); 930 ap->flags &= ~ATA_FLAG_NCQ; 931 } 932 } 933 934 static void sil24_pmp_detach(struct ata_port *ap) 935 { 936 sil24_init_port(ap); 937 sil24_config_pmp(ap, 0); 938 939 ap->flags |= ATA_FLAG_NCQ; 940 } 941 942 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, 943 unsigned long deadline) 944 { 945 int rc; 946 947 rc = sil24_init_port(link->ap); 948 if (rc) { 949 ata_link_err(link, "hardreset failed (port not ready)\n"); 950 return rc; 951 } 952 953 return sata_std_hardreset(link, class, deadline); 954 } 955 956 static void sil24_freeze(struct ata_port *ap) 957 { 958 void __iomem *port = sil24_port_base(ap); 959 960 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear 961 * PORT_IRQ_ENABLE instead. 962 */ 963 writel(0xffff, port + PORT_IRQ_ENABLE_CLR); 964 } 965 966 static void sil24_thaw(struct ata_port *ap) 967 { 968 void __iomem *port = sil24_port_base(ap); 969 u32 tmp; 970 971 /* clear IRQ */ 972 tmp = readl(port + PORT_IRQ_STAT); 973 writel(tmp, port + PORT_IRQ_STAT); 974 975 /* turn IRQ back on */ 976 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET); 977 } 978 979 static void sil24_error_intr(struct ata_port *ap) 980 { 981 void __iomem *port = sil24_port_base(ap); 982 struct sil24_port_priv *pp = ap->private_data; 983 struct ata_queued_cmd *qc = NULL; 984 struct ata_link *link; 985 struct ata_eh_info *ehi; 986 int abort = 0, freeze = 0; 987 u32 irq_stat; 988 989 /* on error, we need to clear IRQ explicitly */ 990 irq_stat = readl(port + PORT_IRQ_STAT); 991 writel(irq_stat, port + PORT_IRQ_STAT); 992 993 /* first, analyze and record host port events */ 994 link = &ap->link; 995 ehi = &link->eh_info; 996 ata_ehi_clear_desc(ehi); 997 998 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); 999 1000 if (irq_stat & PORT_IRQ_SDB_NOTIFY) { 1001 ata_ehi_push_desc(ehi, "SDB notify"); 1002 sata_async_notification(ap); 1003 } 1004 1005 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) { 1006 ata_ehi_hotplugged(ehi); 1007 ata_ehi_push_desc(ehi, "%s", 1008 irq_stat & PORT_IRQ_PHYRDY_CHG ? 1009 "PHY RDY changed" : "device exchanged"); 1010 freeze = 1; 1011 } 1012 1013 if (irq_stat & PORT_IRQ_UNK_FIS) { 1014 ehi->err_mask |= AC_ERR_HSM; 1015 ehi->action |= ATA_EH_RESET; 1016 ata_ehi_push_desc(ehi, "unknown FIS"); 1017 freeze = 1; 1018 } 1019 1020 /* deal with command error */ 1021 if (irq_stat & PORT_IRQ_ERROR) { 1022 struct sil24_cerr_info *ci = NULL; 1023 unsigned int err_mask = 0, action = 0; 1024 u32 context, cerr; 1025 int pmp; 1026 1027 abort = 1; 1028 1029 /* DMA Context Switch Failure in Port Multiplier Mode 1030 * errata. If we have active commands to 3 or more 1031 * devices, any error condition on active devices can 1032 * corrupt DMA context switching. 1033 */ 1034 if (ap->nr_active_links >= 3) { 1035 ehi->err_mask |= AC_ERR_OTHER; 1036 ehi->action |= ATA_EH_RESET; 1037 ata_ehi_push_desc(ehi, "PMP DMA CS errata"); 1038 pp->do_port_rst = 1; 1039 freeze = 1; 1040 } 1041 1042 /* find out the offending link and qc */ 1043 if (sata_pmp_attached(ap)) { 1044 context = readl(port + PORT_CONTEXT); 1045 pmp = (context >> 5) & 0xf; 1046 1047 if (pmp < ap->nr_pmp_links) { 1048 link = &ap->pmp_link[pmp]; 1049 ehi = &link->eh_info; 1050 qc = ata_qc_from_tag(ap, link->active_tag); 1051 1052 ata_ehi_clear_desc(ehi); 1053 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", 1054 irq_stat); 1055 } else { 1056 err_mask |= AC_ERR_HSM; 1057 action |= ATA_EH_RESET; 1058 freeze = 1; 1059 } 1060 } else 1061 qc = ata_qc_from_tag(ap, link->active_tag); 1062 1063 /* analyze CMD_ERR */ 1064 cerr = readl(port + PORT_CMD_ERR); 1065 if (cerr < ARRAY_SIZE(sil24_cerr_db)) 1066 ci = &sil24_cerr_db[cerr]; 1067 1068 if (ci && ci->desc) { 1069 err_mask |= ci->err_mask; 1070 action |= ci->action; 1071 if (action & ATA_EH_RESET) 1072 freeze = 1; 1073 ata_ehi_push_desc(ehi, "%s", ci->desc); 1074 } else { 1075 err_mask |= AC_ERR_OTHER; 1076 action |= ATA_EH_RESET; 1077 freeze = 1; 1078 ata_ehi_push_desc(ehi, "unknown command error %d", 1079 cerr); 1080 } 1081 1082 /* record error info */ 1083 if (qc) 1084 qc->err_mask |= err_mask; 1085 else 1086 ehi->err_mask |= err_mask; 1087 1088 ehi->action |= action; 1089 1090 /* if PMP, resume */ 1091 if (sata_pmp_attached(ap)) 1092 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT); 1093 } 1094 1095 /* freeze or abort */ 1096 if (freeze) 1097 ata_port_freeze(ap); 1098 else if (abort) { 1099 if (qc) 1100 ata_link_abort(qc->dev->link); 1101 else 1102 ata_port_abort(ap); 1103 } 1104 } 1105 1106 static inline void sil24_host_intr(struct ata_port *ap) 1107 { 1108 void __iomem *port = sil24_port_base(ap); 1109 u32 slot_stat, qc_active; 1110 int rc; 1111 1112 /* If PCIX_IRQ_WOC, there's an inherent race window between 1113 * clearing IRQ pending status and reading PORT_SLOT_STAT 1114 * which may cause spurious interrupts afterwards. This is 1115 * unavoidable and much better than losing interrupts which 1116 * happens if IRQ pending is cleared after reading 1117 * PORT_SLOT_STAT. 1118 */ 1119 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) 1120 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT); 1121 1122 slot_stat = readl(port + PORT_SLOT_STAT); 1123 1124 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) { 1125 sil24_error_intr(ap); 1126 return; 1127 } 1128 1129 qc_active = slot_stat & ~HOST_SSTAT_ATTN; 1130 rc = ata_qc_complete_multiple(ap, qc_active); 1131 if (rc > 0) 1132 return; 1133 if (rc < 0) { 1134 struct ata_eh_info *ehi = &ap->link.eh_info; 1135 ehi->err_mask |= AC_ERR_HSM; 1136 ehi->action |= ATA_EH_RESET; 1137 ata_port_freeze(ap); 1138 return; 1139 } 1140 1141 /* spurious interrupts are expected if PCIX_IRQ_WOC */ 1142 if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit()) 1143 ata_port_info(ap, 1144 "spurious interrupt (slot_stat 0x%x active_tag %d sactive 0x%x)\n", 1145 slot_stat, ap->link.active_tag, ap->link.sactive); 1146 } 1147 1148 static irqreturn_t sil24_interrupt(int irq, void *dev_instance) 1149 { 1150 struct ata_host *host = dev_instance; 1151 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1152 unsigned handled = 0; 1153 u32 status; 1154 int i; 1155 1156 status = readl(host_base + HOST_IRQ_STAT); 1157 1158 if (status == 0xffffffff) { 1159 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, " 1160 "PCI fault or device removal?\n"); 1161 goto out; 1162 } 1163 1164 if (!(status & IRQ_STAT_4PORTS)) 1165 goto out; 1166 1167 spin_lock(&host->lock); 1168 1169 for (i = 0; i < host->n_ports; i++) 1170 if (status & (1 << i)) { 1171 sil24_host_intr(host->ports[i]); 1172 handled++; 1173 } 1174 1175 spin_unlock(&host->lock); 1176 out: 1177 return IRQ_RETVAL(handled); 1178 } 1179 1180 static void sil24_error_handler(struct ata_port *ap) 1181 { 1182 struct sil24_port_priv *pp = ap->private_data; 1183 1184 if (sil24_init_port(ap)) 1185 ata_eh_freeze_port(ap); 1186 1187 sata_pmp_error_handler(ap); 1188 1189 pp->do_port_rst = 0; 1190 } 1191 1192 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) 1193 { 1194 struct ata_port *ap = qc->ap; 1195 1196 /* make DMA engine forget about the failed command */ 1197 if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap)) 1198 ata_eh_freeze_port(ap); 1199 } 1200 1201 static int sil24_port_start(struct ata_port *ap) 1202 { 1203 struct device *dev = ap->host->dev; 1204 struct sil24_port_priv *pp; 1205 union sil24_cmd_block *cb; 1206 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS; 1207 dma_addr_t cb_dma; 1208 1209 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 1210 if (!pp) 1211 return -ENOMEM; 1212 1213 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); 1214 if (!cb) 1215 return -ENOMEM; 1216 memset(cb, 0, cb_size); 1217 1218 pp->cmd_block = cb; 1219 pp->cmd_block_dma = cb_dma; 1220 1221 ap->private_data = pp; 1222 1223 ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host"); 1224 ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port"); 1225 1226 return 0; 1227 } 1228 1229 static void sil24_init_controller(struct ata_host *host) 1230 { 1231 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1232 u32 tmp; 1233 int i; 1234 1235 /* GPIO off */ 1236 writel(0, host_base + HOST_FLASH_CMD); 1237 1238 /* clear global reset & mask interrupts during initialization */ 1239 writel(0, host_base + HOST_CTRL); 1240 1241 /* init ports */ 1242 for (i = 0; i < host->n_ports; i++) { 1243 struct ata_port *ap = host->ports[i]; 1244 void __iomem *port = sil24_port_base(ap); 1245 1246 1247 /* Initial PHY setting */ 1248 writel(0x20c, port + PORT_PHY_CFG); 1249 1250 /* Clear port RST */ 1251 tmp = readl(port + PORT_CTRL_STAT); 1252 if (tmp & PORT_CS_PORT_RST) { 1253 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); 1254 tmp = ata_wait_register(NULL, port + PORT_CTRL_STAT, 1255 PORT_CS_PORT_RST, 1256 PORT_CS_PORT_RST, 10, 100); 1257 if (tmp & PORT_CS_PORT_RST) 1258 dev_err(host->dev, 1259 "failed to clear port RST\n"); 1260 } 1261 1262 /* configure port */ 1263 sil24_config_port(ap); 1264 } 1265 1266 /* Turn on interrupts */ 1267 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL); 1268 } 1269 1270 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 1271 { 1272 extern int __MARKER__sil24_cmd_block_is_sized_wrongly; 1273 struct ata_port_info pi = sil24_port_info[ent->driver_data]; 1274 const struct ata_port_info *ppi[] = { &pi, NULL }; 1275 void __iomem * const *iomap; 1276 struct ata_host *host; 1277 int rc; 1278 u32 tmp; 1279 1280 /* cause link error if sil24_cmd_block is sized wrongly */ 1281 if (sizeof(union sil24_cmd_block) != PAGE_SIZE) 1282 __MARKER__sil24_cmd_block_is_sized_wrongly = 1; 1283 1284 ata_print_version_once(&pdev->dev, DRV_VERSION); 1285 1286 /* acquire resources */ 1287 rc = pcim_enable_device(pdev); 1288 if (rc) 1289 return rc; 1290 1291 rc = pcim_iomap_regions(pdev, 1292 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR), 1293 DRV_NAME); 1294 if (rc) 1295 return rc; 1296 iomap = pcim_iomap_table(pdev); 1297 1298 /* apply workaround for completion IRQ loss on PCI-X errata */ 1299 if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) { 1300 tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL); 1301 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL)) 1302 dev_info(&pdev->dev, 1303 "Applying completion IRQ loss on PCI-X errata fix\n"); 1304 else 1305 pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC; 1306 } 1307 1308 /* allocate and fill host */ 1309 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1310 SIL24_FLAG2NPORTS(ppi[0]->flags)); 1311 if (!host) 1312 return -ENOMEM; 1313 host->iomap = iomap; 1314 1315 /* configure and activate the device */ 1316 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 1317 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 1318 if (rc) { 1319 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 1320 if (rc) { 1321 dev_err(&pdev->dev, 1322 "64-bit DMA enable failed\n"); 1323 return rc; 1324 } 1325 } 1326 } else { 1327 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 1328 if (rc) { 1329 dev_err(&pdev->dev, "32-bit DMA enable failed\n"); 1330 return rc; 1331 } 1332 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 1333 if (rc) { 1334 dev_err(&pdev->dev, 1335 "32-bit consistent DMA enable failed\n"); 1336 return rc; 1337 } 1338 } 1339 1340 /* Set max read request size to 4096. This slightly increases 1341 * write throughput for pci-e variants. 1342 */ 1343 pcie_set_readrq(pdev, 4096); 1344 1345 sil24_init_controller(host); 1346 1347 if (sata_sil24_msi && !pci_enable_msi(pdev)) { 1348 dev_info(&pdev->dev, "Using MSI\n"); 1349 pci_intx(pdev, 0); 1350 } 1351 1352 pci_set_master(pdev); 1353 return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED, 1354 &sil24_sht); 1355 } 1356 1357 #ifdef CONFIG_PM 1358 static int sil24_pci_device_resume(struct pci_dev *pdev) 1359 { 1360 struct ata_host *host = dev_get_drvdata(&pdev->dev); 1361 void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; 1362 int rc; 1363 1364 rc = ata_pci_device_do_resume(pdev); 1365 if (rc) 1366 return rc; 1367 1368 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) 1369 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL); 1370 1371 sil24_init_controller(host); 1372 1373 ata_host_resume(host); 1374 1375 return 0; 1376 } 1377 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 static int __init sil24_init(void) 1386 { 1387 return pci_register_driver(&sil24_pci_driver); 1388 } 1389 1390 static void __exit sil24_exit(void) 1391 { 1392 pci_unregister_driver(&sil24_pci_driver); 1393 } 1394 1395 MODULE_AUTHOR("Tejun Heo"); 1396 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver"); 1397 MODULE_LICENSE("GPL"); 1398 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl); 1399 1400 module_init(sil24_init); 1401 module_exit(sil24_exit); 1402