1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libahci.c - Common AHCI SATA low-level routines 4 * 5 * Maintained by: Tejun Heo <tj@kernel.org> 6 * Please ALWAYS copy linux-ide@vger.kernel.org 7 * on emails. 8 * 9 * Copyright 2004-2005 Red Hat, Inc. 10 * 11 * libata documentation is available via 'make {ps|pdf}docs', 12 * as Documentation/driver-api/libata.rst 13 * 14 * AHCI hardware documentation: 15 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf 16 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf 17 */ 18 19 #include <linux/bitops.h> 20 #include <linux/kernel.h> 21 #include <linux/gfp.h> 22 #include <linux/module.h> 23 #include <linux/nospec.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 #include <linux/pci.h> 33 #include "ahci.h" 34 #include "libata.h" 35 36 static int ahci_skip_host_reset; 37 int ahci_ignore_sss; 38 EXPORT_SYMBOL_GPL(ahci_ignore_sss); 39 40 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444); 41 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)"); 42 43 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444); 44 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)"); 45 46 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, 47 unsigned hints); 48 static ssize_t ahci_led_show(struct ata_port *ap, char *buf); 49 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, 50 size_t size); 51 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, 52 ssize_t size); 53 54 55 56 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); 57 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); 58 static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc); 59 static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask); 60 static int ahci_port_start(struct ata_port *ap); 61 static void ahci_port_stop(struct ata_port *ap); 62 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc); 63 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc); 64 static void ahci_freeze(struct ata_port *ap); 65 static void ahci_thaw(struct ata_port *ap); 66 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep); 67 static void ahci_enable_fbs(struct ata_port *ap); 68 static void ahci_disable_fbs(struct ata_port *ap); 69 static void ahci_pmp_attach(struct ata_port *ap); 70 static void ahci_pmp_detach(struct ata_port *ap); 71 static int ahci_softreset(struct ata_link *link, unsigned int *class, 72 unsigned long deadline); 73 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, 74 unsigned long deadline); 75 static int ahci_hardreset(struct ata_link *link, unsigned int *class, 76 unsigned long deadline); 77 static void ahci_postreset(struct ata_link *link, unsigned int *class); 78 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc); 79 static void ahci_dev_config(struct ata_device *dev); 80 #ifdef CONFIG_PM 81 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg); 82 #endif 83 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf); 84 static ssize_t ahci_activity_store(struct ata_device *dev, 85 enum sw_activity val); 86 static void ahci_init_sw_activity(struct ata_link *link); 87 88 static ssize_t ahci_show_host_caps(struct device *dev, 89 struct device_attribute *attr, char *buf); 90 static ssize_t ahci_show_host_cap2(struct device *dev, 91 struct device_attribute *attr, char *buf); 92 static ssize_t ahci_show_host_version(struct device *dev, 93 struct device_attribute *attr, char *buf); 94 static ssize_t ahci_show_port_cmd(struct device *dev, 95 struct device_attribute *attr, char *buf); 96 static ssize_t ahci_read_em_buffer(struct device *dev, 97 struct device_attribute *attr, char *buf); 98 static ssize_t ahci_store_em_buffer(struct device *dev, 99 struct device_attribute *attr, 100 const char *buf, size_t size); 101 static ssize_t ahci_show_em_supported(struct device *dev, 102 struct device_attribute *attr, char *buf); 103 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance); 104 105 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); 106 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL); 107 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL); 108 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL); 109 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, 110 ahci_read_em_buffer, ahci_store_em_buffer); 111 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL); 112 113 static struct attribute *ahci_shost_attrs[] = { 114 &dev_attr_link_power_management_policy.attr, 115 &dev_attr_em_message_type.attr, 116 &dev_attr_em_message.attr, 117 &dev_attr_ahci_host_caps.attr, 118 &dev_attr_ahci_host_cap2.attr, 119 &dev_attr_ahci_host_version.attr, 120 &dev_attr_ahci_port_cmd.attr, 121 &dev_attr_em_buffer.attr, 122 &dev_attr_em_message_supported.attr, 123 NULL 124 }; 125 126 static const struct attribute_group ahci_shost_attr_group = { 127 .attrs = ahci_shost_attrs 128 }; 129 130 const struct attribute_group *ahci_shost_groups[] = { 131 &ahci_shost_attr_group, 132 NULL 133 }; 134 EXPORT_SYMBOL_GPL(ahci_shost_groups); 135 136 static struct attribute *ahci_sdev_attrs[] = { 137 &dev_attr_sw_activity.attr, 138 &dev_attr_unload_heads.attr, 139 &dev_attr_ncq_prio_supported.attr, 140 &dev_attr_ncq_prio_enable.attr, 141 NULL 142 }; 143 144 static const struct attribute_group ahci_sdev_attr_group = { 145 .attrs = ahci_sdev_attrs 146 }; 147 148 const struct attribute_group *ahci_sdev_groups[] = { 149 &ahci_sdev_attr_group, 150 NULL 151 }; 152 EXPORT_SYMBOL_GPL(ahci_sdev_groups); 153 154 struct ata_port_operations ahci_ops = { 155 .inherits = &sata_pmp_port_ops, 156 157 .qc_defer = ahci_pmp_qc_defer, 158 .qc_prep = ahci_qc_prep, 159 .qc_issue = ahci_qc_issue, 160 .qc_fill_rtf = ahci_qc_fill_rtf, 161 .qc_ncq_fill_rtf = ahci_qc_ncq_fill_rtf, 162 163 .freeze = ahci_freeze, 164 .thaw = ahci_thaw, 165 .softreset = ahci_softreset, 166 .hardreset = ahci_hardreset, 167 .postreset = ahci_postreset, 168 .pmp_softreset = ahci_softreset, 169 .error_handler = ahci_error_handler, 170 .post_internal_cmd = ahci_post_internal_cmd, 171 .dev_config = ahci_dev_config, 172 173 .scr_read = ahci_scr_read, 174 .scr_write = ahci_scr_write, 175 .pmp_attach = ahci_pmp_attach, 176 .pmp_detach = ahci_pmp_detach, 177 178 .set_lpm = ahci_set_lpm, 179 .em_show = ahci_led_show, 180 .em_store = ahci_led_store, 181 .sw_activity_show = ahci_activity_show, 182 .sw_activity_store = ahci_activity_store, 183 .transmit_led_message = ahci_transmit_led_message, 184 #ifdef CONFIG_PM 185 .port_suspend = ahci_port_suspend, 186 .port_resume = ahci_port_resume, 187 #endif 188 .port_start = ahci_port_start, 189 .port_stop = ahci_port_stop, 190 }; 191 EXPORT_SYMBOL_GPL(ahci_ops); 192 193 struct ata_port_operations ahci_pmp_retry_srst_ops = { 194 .inherits = &ahci_ops, 195 .softreset = ahci_pmp_retry_softreset, 196 }; 197 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops); 198 199 static bool ahci_em_messages __read_mostly = true; 200 module_param(ahci_em_messages, bool, 0444); 201 /* add other LED protocol types when they become supported */ 202 MODULE_PARM_DESC(ahci_em_messages, 203 "AHCI Enclosure Management Message control (0 = off, 1 = on)"); 204 205 /* device sleep idle timeout in ms */ 206 static int devslp_idle_timeout __read_mostly = 1000; 207 module_param(devslp_idle_timeout, int, 0644); 208 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout"); 209 210 static void ahci_enable_ahci(void __iomem *mmio) 211 { 212 int i; 213 u32 tmp; 214 215 /* turn on AHCI_EN */ 216 tmp = readl(mmio + HOST_CTL); 217 if (tmp & HOST_AHCI_EN) 218 return; 219 220 /* Some controllers need AHCI_EN to be written multiple times. 221 * Try a few times before giving up. 222 */ 223 for (i = 0; i < 5; i++) { 224 tmp |= HOST_AHCI_EN; 225 writel(tmp, mmio + HOST_CTL); 226 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */ 227 if (tmp & HOST_AHCI_EN) 228 return; 229 msleep(10); 230 } 231 232 WARN_ON(1); 233 } 234 235 /** 236 * ahci_rpm_get_port - Make sure the port is powered on 237 * @ap: Port to power on 238 * 239 * Whenever there is need to access the AHCI host registers outside of 240 * normal execution paths, call this function to make sure the host is 241 * actually powered on. 242 */ 243 static int ahci_rpm_get_port(struct ata_port *ap) 244 { 245 return pm_runtime_get_sync(ap->dev); 246 } 247 248 /** 249 * ahci_rpm_put_port - Undoes ahci_rpm_get_port() 250 * @ap: Port to power down 251 * 252 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host 253 * if it has no more active users. 254 */ 255 static void ahci_rpm_put_port(struct ata_port *ap) 256 { 257 pm_runtime_put(ap->dev); 258 } 259 260 static ssize_t ahci_show_host_caps(struct device *dev, 261 struct device_attribute *attr, char *buf) 262 { 263 struct Scsi_Host *shost = class_to_shost(dev); 264 struct ata_port *ap = ata_shost_to_port(shost); 265 struct ahci_host_priv *hpriv = ap->host->private_data; 266 267 return sprintf(buf, "%x\n", hpriv->cap); 268 } 269 270 static ssize_t ahci_show_host_cap2(struct device *dev, 271 struct device_attribute *attr, char *buf) 272 { 273 struct Scsi_Host *shost = class_to_shost(dev); 274 struct ata_port *ap = ata_shost_to_port(shost); 275 struct ahci_host_priv *hpriv = ap->host->private_data; 276 277 return sprintf(buf, "%x\n", hpriv->cap2); 278 } 279 280 static ssize_t ahci_show_host_version(struct device *dev, 281 struct device_attribute *attr, char *buf) 282 { 283 struct Scsi_Host *shost = class_to_shost(dev); 284 struct ata_port *ap = ata_shost_to_port(shost); 285 struct ahci_host_priv *hpriv = ap->host->private_data; 286 287 return sprintf(buf, "%x\n", hpriv->version); 288 } 289 290 static ssize_t ahci_show_port_cmd(struct device *dev, 291 struct device_attribute *attr, char *buf) 292 { 293 struct Scsi_Host *shost = class_to_shost(dev); 294 struct ata_port *ap = ata_shost_to_port(shost); 295 void __iomem *port_mmio = ahci_port_base(ap); 296 ssize_t ret; 297 298 ahci_rpm_get_port(ap); 299 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD)); 300 ahci_rpm_put_port(ap); 301 302 return ret; 303 } 304 305 static ssize_t ahci_read_em_buffer(struct device *dev, 306 struct device_attribute *attr, char *buf) 307 { 308 struct Scsi_Host *shost = class_to_shost(dev); 309 struct ata_port *ap = ata_shost_to_port(shost); 310 struct ahci_host_priv *hpriv = ap->host->private_data; 311 void __iomem *mmio = hpriv->mmio; 312 void __iomem *em_mmio = mmio + hpriv->em_loc; 313 u32 em_ctl, msg; 314 unsigned long flags; 315 size_t count; 316 int i; 317 318 ahci_rpm_get_port(ap); 319 spin_lock_irqsave(ap->lock, flags); 320 321 em_ctl = readl(mmio + HOST_EM_CTL); 322 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT || 323 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) { 324 spin_unlock_irqrestore(ap->lock, flags); 325 ahci_rpm_put_port(ap); 326 return -EINVAL; 327 } 328 329 if (!(em_ctl & EM_CTL_MR)) { 330 spin_unlock_irqrestore(ap->lock, flags); 331 ahci_rpm_put_port(ap); 332 return -EAGAIN; 333 } 334 335 if (!(em_ctl & EM_CTL_SMB)) 336 em_mmio += hpriv->em_buf_sz; 337 338 count = hpriv->em_buf_sz; 339 340 /* the count should not be larger than PAGE_SIZE */ 341 if (count > PAGE_SIZE) { 342 if (printk_ratelimit()) 343 ata_port_warn(ap, 344 "EM read buffer size too large: " 345 "buffer size %u, page size %lu\n", 346 hpriv->em_buf_sz, PAGE_SIZE); 347 count = PAGE_SIZE; 348 } 349 350 for (i = 0; i < count; i += 4) { 351 msg = readl(em_mmio + i); 352 buf[i] = msg & 0xff; 353 buf[i + 1] = (msg >> 8) & 0xff; 354 buf[i + 2] = (msg >> 16) & 0xff; 355 buf[i + 3] = (msg >> 24) & 0xff; 356 } 357 358 spin_unlock_irqrestore(ap->lock, flags); 359 ahci_rpm_put_port(ap); 360 361 return i; 362 } 363 364 static ssize_t ahci_store_em_buffer(struct device *dev, 365 struct device_attribute *attr, 366 const char *buf, size_t size) 367 { 368 struct Scsi_Host *shost = class_to_shost(dev); 369 struct ata_port *ap = ata_shost_to_port(shost); 370 struct ahci_host_priv *hpriv = ap->host->private_data; 371 void __iomem *mmio = hpriv->mmio; 372 void __iomem *em_mmio = mmio + hpriv->em_loc; 373 const unsigned char *msg_buf = buf; 374 u32 em_ctl, msg; 375 unsigned long flags; 376 int i; 377 378 /* check size validity */ 379 if (!(ap->flags & ATA_FLAG_EM) || 380 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) || 381 size % 4 || size > hpriv->em_buf_sz) 382 return -EINVAL; 383 384 ahci_rpm_get_port(ap); 385 spin_lock_irqsave(ap->lock, flags); 386 387 em_ctl = readl(mmio + HOST_EM_CTL); 388 if (em_ctl & EM_CTL_TM) { 389 spin_unlock_irqrestore(ap->lock, flags); 390 ahci_rpm_put_port(ap); 391 return -EBUSY; 392 } 393 394 for (i = 0; i < size; i += 4) { 395 msg = msg_buf[i] | msg_buf[i + 1] << 8 | 396 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24; 397 writel(msg, em_mmio + i); 398 } 399 400 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); 401 402 spin_unlock_irqrestore(ap->lock, flags); 403 ahci_rpm_put_port(ap); 404 405 return size; 406 } 407 408 static ssize_t ahci_show_em_supported(struct device *dev, 409 struct device_attribute *attr, char *buf) 410 { 411 struct Scsi_Host *shost = class_to_shost(dev); 412 struct ata_port *ap = ata_shost_to_port(shost); 413 struct ahci_host_priv *hpriv = ap->host->private_data; 414 void __iomem *mmio = hpriv->mmio; 415 u32 em_ctl; 416 417 ahci_rpm_get_port(ap); 418 em_ctl = readl(mmio + HOST_EM_CTL); 419 ahci_rpm_put_port(ap); 420 421 return sprintf(buf, "%s%s%s%s\n", 422 em_ctl & EM_CTL_LED ? "led " : "", 423 em_ctl & EM_CTL_SAFTE ? "saf-te " : "", 424 em_ctl & EM_CTL_SES ? "ses-2 " : "", 425 em_ctl & EM_CTL_SGPIO ? "sgpio " : ""); 426 } 427 428 /** 429 * ahci_save_initial_config - Save and fixup initial config values 430 * @dev: target AHCI device 431 * @hpriv: host private area to store config values 432 * 433 * Some registers containing configuration info might be setup by 434 * BIOS and might be cleared on reset. This function saves the 435 * initial values of those registers into @hpriv such that they 436 * can be restored after controller reset. 437 * 438 * If inconsistent, config values are fixed up by this function. 439 * 440 * If it is not set already this function sets hpriv->start_engine to 441 * ahci_start_engine. 442 * 443 * LOCKING: 444 * None. 445 */ 446 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv) 447 { 448 void __iomem *mmio = hpriv->mmio; 449 void __iomem *port_mmio; 450 unsigned long port_map; 451 u32 cap, cap2, vers; 452 int i; 453 454 /* make sure AHCI mode is enabled before accessing CAP */ 455 ahci_enable_ahci(mmio); 456 457 /* 458 * Values prefixed with saved_ are written back to the HBA and ports 459 * registers after reset. Values without are used for driver operation. 460 */ 461 462 /* 463 * Override HW-init HBA capability fields with the platform-specific 464 * values. The rest of the HBA capabilities are defined as Read-only 465 * and can't be modified in CSR anyway. 466 */ 467 cap = readl(mmio + HOST_CAP); 468 if (hpriv->saved_cap) 469 cap = (cap & ~(HOST_CAP_SSS | HOST_CAP_MPS)) | hpriv->saved_cap; 470 hpriv->saved_cap = cap; 471 472 /* CAP2 register is only defined for AHCI 1.2 and later */ 473 vers = readl(mmio + HOST_VERSION); 474 if ((vers >> 16) > 1 || 475 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200)) 476 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2); 477 else 478 hpriv->saved_cap2 = cap2 = 0; 479 480 /* some chips have errata preventing 64bit use */ 481 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) { 482 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n"); 483 cap &= ~HOST_CAP_64; 484 } 485 486 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) { 487 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n"); 488 cap &= ~HOST_CAP_NCQ; 489 } 490 491 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) { 492 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n"); 493 cap |= HOST_CAP_NCQ; 494 } 495 496 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) { 497 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n"); 498 cap &= ~HOST_CAP_PMP; 499 } 500 501 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) { 502 dev_info(dev, 503 "controller can't do SNTF, turning off CAP_SNTF\n"); 504 cap &= ~HOST_CAP_SNTF; 505 } 506 507 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) { 508 dev_info(dev, 509 "controller can't do DEVSLP, turning off\n"); 510 cap2 &= ~HOST_CAP2_SDS; 511 cap2 &= ~HOST_CAP2_SADM; 512 } 513 514 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) { 515 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n"); 516 cap |= HOST_CAP_FBS; 517 } 518 519 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) { 520 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n"); 521 cap &= ~HOST_CAP_FBS; 522 } 523 524 if (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) { 525 dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n"); 526 cap |= HOST_CAP_ALPM; 527 } 528 529 if ((cap & HOST_CAP_SXS) && (hpriv->flags & AHCI_HFLAG_NO_SXS)) { 530 dev_info(dev, "controller does not support SXS, disabling CAP_SXS\n"); 531 cap &= ~HOST_CAP_SXS; 532 } 533 534 /* Override the HBA ports mapping if the platform needs it */ 535 port_map = readl(mmio + HOST_PORTS_IMPL); 536 if (hpriv->saved_port_map && port_map != hpriv->saved_port_map) { 537 dev_info(dev, "forcing port_map 0x%lx -> 0x%x\n", 538 port_map, hpriv->saved_port_map); 539 port_map = hpriv->saved_port_map; 540 } else { 541 hpriv->saved_port_map = port_map; 542 } 543 544 if (hpriv->mask_port_map) { 545 dev_warn(dev, "masking port_map 0x%lx -> 0x%lx\n", 546 port_map, 547 port_map & hpriv->mask_port_map); 548 port_map &= hpriv->mask_port_map; 549 } 550 551 /* cross check port_map and cap.n_ports */ 552 if (port_map) { 553 int map_ports = 0; 554 555 for (i = 0; i < AHCI_MAX_PORTS; i++) 556 if (port_map & (1 << i)) 557 map_ports++; 558 559 /* If PI has more ports than n_ports, whine, clear 560 * port_map and let it be generated from n_ports. 561 */ 562 if (map_ports > ahci_nr_ports(cap)) { 563 dev_warn(dev, 564 "implemented port map (0x%lx) contains more ports than nr_ports (%u), using nr_ports\n", 565 port_map, ahci_nr_ports(cap)); 566 port_map = 0; 567 } 568 } 569 570 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */ 571 if (!port_map && vers < 0x10300) { 572 port_map = (1 << ahci_nr_ports(cap)) - 1; 573 dev_warn(dev, "forcing PORTS_IMPL to 0x%lx\n", port_map); 574 575 /* write the fixed up value to the PI register */ 576 hpriv->saved_port_map = port_map; 577 } 578 579 /* 580 * Preserve the ports capabilities defined by the platform. Note there 581 * is no need in storing the rest of the P#.CMD fields since they are 582 * volatile. 583 */ 584 for_each_set_bit(i, &port_map, AHCI_MAX_PORTS) { 585 if (hpriv->saved_port_cap[i]) 586 continue; 587 588 port_mmio = __ahci_port_base(hpriv, i); 589 hpriv->saved_port_cap[i] = 590 readl(port_mmio + PORT_CMD) & PORT_CMD_CAP; 591 } 592 593 /* record values to use during operation */ 594 hpriv->cap = cap; 595 hpriv->cap2 = cap2; 596 hpriv->version = vers; 597 hpriv->port_map = port_map; 598 599 if (!hpriv->start_engine) 600 hpriv->start_engine = ahci_start_engine; 601 602 if (!hpriv->stop_engine) 603 hpriv->stop_engine = ahci_stop_engine; 604 605 if (!hpriv->irq_handler) 606 hpriv->irq_handler = ahci_single_level_irq_intr; 607 } 608 EXPORT_SYMBOL_GPL(ahci_save_initial_config); 609 610 /** 611 * ahci_restore_initial_config - Restore initial config 612 * @host: target ATA host 613 * 614 * Restore initial config stored by ahci_save_initial_config(). 615 * 616 * LOCKING: 617 * None. 618 */ 619 static void ahci_restore_initial_config(struct ata_host *host) 620 { 621 struct ahci_host_priv *hpriv = host->private_data; 622 unsigned long port_map = hpriv->port_map; 623 void __iomem *mmio = hpriv->mmio; 624 void __iomem *port_mmio; 625 int i; 626 627 writel(hpriv->saved_cap, mmio + HOST_CAP); 628 if (hpriv->saved_cap2) 629 writel(hpriv->saved_cap2, mmio + HOST_CAP2); 630 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL); 631 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ 632 633 for_each_set_bit(i, &port_map, AHCI_MAX_PORTS) { 634 port_mmio = __ahci_port_base(hpriv, i); 635 writel(hpriv->saved_port_cap[i], port_mmio + PORT_CMD); 636 } 637 } 638 639 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg) 640 { 641 static const int offset[] = { 642 [SCR_STATUS] = PORT_SCR_STAT, 643 [SCR_CONTROL] = PORT_SCR_CTL, 644 [SCR_ERROR] = PORT_SCR_ERR, 645 [SCR_ACTIVE] = PORT_SCR_ACT, 646 [SCR_NOTIFICATION] = PORT_SCR_NTF, 647 }; 648 struct ahci_host_priv *hpriv = ap->host->private_data; 649 650 if (sc_reg < ARRAY_SIZE(offset) && 651 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF))) 652 return offset[sc_reg]; 653 return 0; 654 } 655 656 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) 657 { 658 void __iomem *port_mmio = ahci_port_base(link->ap); 659 int offset = ahci_scr_offset(link->ap, sc_reg); 660 661 if (offset) { 662 *val = readl(port_mmio + offset); 663 return 0; 664 } 665 return -EINVAL; 666 } 667 668 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) 669 { 670 void __iomem *port_mmio = ahci_port_base(link->ap); 671 int offset = ahci_scr_offset(link->ap, sc_reg); 672 673 if (offset) { 674 writel(val, port_mmio + offset); 675 return 0; 676 } 677 return -EINVAL; 678 } 679 680 void ahci_start_engine(struct ata_port *ap) 681 { 682 void __iomem *port_mmio = ahci_port_base(ap); 683 u32 tmp; 684 685 /* start DMA */ 686 tmp = readl(port_mmio + PORT_CMD); 687 tmp |= PORT_CMD_START; 688 writel(tmp, port_mmio + PORT_CMD); 689 readl(port_mmio + PORT_CMD); /* flush */ 690 } 691 EXPORT_SYMBOL_GPL(ahci_start_engine); 692 693 int ahci_stop_engine(struct ata_port *ap) 694 { 695 void __iomem *port_mmio = ahci_port_base(ap); 696 struct ahci_host_priv *hpriv = ap->host->private_data; 697 u32 tmp; 698 699 /* 700 * On some controllers, stopping a port's DMA engine while the port 701 * is in ALPM state (partial or slumber) results in failures on 702 * subsequent DMA engine starts. For those controllers, put the 703 * port back in active state before stopping its DMA engine. 704 */ 705 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) && 706 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) && 707 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) { 708 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n"); 709 return -EIO; 710 } 711 712 tmp = readl(port_mmio + PORT_CMD); 713 714 /* check if the HBA is idle */ 715 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0) 716 return 0; 717 718 /* 719 * Don't try to issue commands but return with ENODEV if the 720 * AHCI controller not available anymore (e.g. due to PCIe hot 721 * unplugging). Otherwise a 500ms delay for each port is added. 722 */ 723 if (tmp == 0xffffffff) { 724 dev_err(ap->host->dev, "AHCI controller unavailable!\n"); 725 return -ENODEV; 726 } 727 728 /* setting HBA to idle */ 729 tmp &= ~PORT_CMD_START; 730 writel(tmp, port_mmio + PORT_CMD); 731 732 /* wait for engine to stop. This could be as long as 500 msec */ 733 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, 734 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500); 735 if (tmp & PORT_CMD_LIST_ON) 736 return -EIO; 737 738 return 0; 739 } 740 EXPORT_SYMBOL_GPL(ahci_stop_engine); 741 742 void ahci_start_fis_rx(struct ata_port *ap) 743 { 744 void __iomem *port_mmio = ahci_port_base(ap); 745 struct ahci_host_priv *hpriv = ap->host->private_data; 746 struct ahci_port_priv *pp = ap->private_data; 747 u32 tmp; 748 749 /* set FIS registers */ 750 if (hpriv->cap & HOST_CAP_64) 751 writel((pp->cmd_slot_dma >> 16) >> 16, 752 port_mmio + PORT_LST_ADDR_HI); 753 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); 754 755 if (hpriv->cap & HOST_CAP_64) 756 writel((pp->rx_fis_dma >> 16) >> 16, 757 port_mmio + PORT_FIS_ADDR_HI); 758 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); 759 760 /* enable FIS reception */ 761 tmp = readl(port_mmio + PORT_CMD); 762 tmp |= PORT_CMD_FIS_RX; 763 writel(tmp, port_mmio + PORT_CMD); 764 765 /* flush */ 766 readl(port_mmio + PORT_CMD); 767 } 768 EXPORT_SYMBOL_GPL(ahci_start_fis_rx); 769 770 static int ahci_stop_fis_rx(struct ata_port *ap) 771 { 772 void __iomem *port_mmio = ahci_port_base(ap); 773 u32 tmp; 774 775 /* disable FIS reception */ 776 tmp = readl(port_mmio + PORT_CMD); 777 tmp &= ~PORT_CMD_FIS_RX; 778 writel(tmp, port_mmio + PORT_CMD); 779 780 /* wait for completion, spec says 500ms, give it 1000 */ 781 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON, 782 PORT_CMD_FIS_ON, 10, 1000); 783 if (tmp & PORT_CMD_FIS_ON) 784 return -EBUSY; 785 786 return 0; 787 } 788 789 static void ahci_power_up(struct ata_port *ap) 790 { 791 struct ahci_host_priv *hpriv = ap->host->private_data; 792 void __iomem *port_mmio = ahci_port_base(ap); 793 u32 cmd; 794 795 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; 796 797 /* spin up device */ 798 if (hpriv->cap & HOST_CAP_SSS) { 799 cmd |= PORT_CMD_SPIN_UP; 800 writel(cmd, port_mmio + PORT_CMD); 801 } 802 803 /* wake up link */ 804 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD); 805 } 806 807 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, 808 unsigned int hints) 809 { 810 struct ata_port *ap = link->ap; 811 struct ahci_host_priv *hpriv = ap->host->private_data; 812 struct ahci_port_priv *pp = ap->private_data; 813 void __iomem *port_mmio = ahci_port_base(ap); 814 815 if (policy != ATA_LPM_MAX_POWER) { 816 /* wakeup flag only applies to the max power policy */ 817 hints &= ~ATA_LPM_WAKE_ONLY; 818 819 /* 820 * Disable interrupts on Phy Ready. This keeps us from 821 * getting woken up due to spurious phy ready 822 * interrupts. 823 */ 824 pp->intr_mask &= ~PORT_IRQ_PHYRDY; 825 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 826 827 sata_link_scr_lpm(link, policy, false); 828 } 829 830 if (hpriv->cap & HOST_CAP_ALPM) { 831 u32 cmd = readl(port_mmio + PORT_CMD); 832 833 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) { 834 if (!(hints & ATA_LPM_WAKE_ONLY)) 835 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE); 836 cmd |= PORT_CMD_ICC_ACTIVE; 837 838 writel(cmd, port_mmio + PORT_CMD); 839 readl(port_mmio + PORT_CMD); 840 841 /* wait 10ms to be sure we've come out of LPM state */ 842 ata_msleep(ap, 10); 843 844 if (hints & ATA_LPM_WAKE_ONLY) 845 return 0; 846 } else { 847 cmd |= PORT_CMD_ALPE; 848 if (policy == ATA_LPM_MIN_POWER) 849 cmd |= PORT_CMD_ASP; 850 else if (policy == ATA_LPM_MIN_POWER_WITH_PARTIAL) 851 cmd &= ~PORT_CMD_ASP; 852 853 /* write out new cmd value */ 854 writel(cmd, port_mmio + PORT_CMD); 855 } 856 } 857 858 /* set aggressive device sleep */ 859 if ((hpriv->cap2 & HOST_CAP2_SDS) && 860 (hpriv->cap2 & HOST_CAP2_SADM) && 861 (link->device->flags & ATA_DFLAG_DEVSLP)) { 862 if (policy == ATA_LPM_MIN_POWER || 863 policy == ATA_LPM_MIN_POWER_WITH_PARTIAL) 864 ahci_set_aggressive_devslp(ap, true); 865 else 866 ahci_set_aggressive_devslp(ap, false); 867 } 868 869 if (policy == ATA_LPM_MAX_POWER) { 870 sata_link_scr_lpm(link, policy, false); 871 872 /* turn PHYRDY IRQ back on */ 873 pp->intr_mask |= PORT_IRQ_PHYRDY; 874 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 875 } 876 877 return 0; 878 } 879 880 #ifdef CONFIG_PM 881 static void ahci_power_down(struct ata_port *ap) 882 { 883 struct ahci_host_priv *hpriv = ap->host->private_data; 884 void __iomem *port_mmio = ahci_port_base(ap); 885 u32 cmd, scontrol; 886 887 if (!(hpriv->cap & HOST_CAP_SSS)) 888 return; 889 890 /* put device into listen mode, first set PxSCTL.DET to 0 */ 891 scontrol = readl(port_mmio + PORT_SCR_CTL); 892 scontrol &= ~0xf; 893 writel(scontrol, port_mmio + PORT_SCR_CTL); 894 895 /* then set PxCMD.SUD to 0 */ 896 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; 897 cmd &= ~PORT_CMD_SPIN_UP; 898 writel(cmd, port_mmio + PORT_CMD); 899 } 900 #endif 901 902 static void ahci_start_port(struct ata_port *ap) 903 { 904 struct ahci_host_priv *hpriv = ap->host->private_data; 905 struct ahci_port_priv *pp = ap->private_data; 906 struct ata_link *link; 907 struct ahci_em_priv *emp; 908 ssize_t rc; 909 int i; 910 911 /* enable FIS reception */ 912 ahci_start_fis_rx(ap); 913 914 /* enable DMA */ 915 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE)) 916 hpriv->start_engine(ap); 917 918 /* turn on LEDs */ 919 if (ap->flags & ATA_FLAG_EM) { 920 ata_for_each_link(link, ap, EDGE) { 921 emp = &pp->em_priv[link->pmp]; 922 923 /* EM Transmit bit maybe busy during init */ 924 for (i = 0; i < EM_MAX_RETRY; i++) { 925 rc = ap->ops->transmit_led_message(ap, 926 emp->led_state, 927 4); 928 /* 929 * If busy, give a breather but do not 930 * release EH ownership by using msleep() 931 * instead of ata_msleep(). EM Transmit 932 * bit is busy for the whole host and 933 * releasing ownership will cause other 934 * ports to fail the same way. 935 */ 936 if (rc == -EBUSY) 937 msleep(1); 938 else 939 break; 940 } 941 } 942 } 943 944 if (ap->flags & ATA_FLAG_SW_ACTIVITY) 945 ata_for_each_link(link, ap, EDGE) 946 ahci_init_sw_activity(link); 947 948 } 949 950 static int ahci_deinit_port(struct ata_port *ap, const char **emsg) 951 { 952 int rc; 953 struct ahci_host_priv *hpriv = ap->host->private_data; 954 955 /* disable DMA */ 956 rc = hpriv->stop_engine(ap); 957 if (rc) { 958 *emsg = "failed to stop engine"; 959 return rc; 960 } 961 962 /* disable FIS reception */ 963 rc = ahci_stop_fis_rx(ap); 964 if (rc) { 965 *emsg = "failed stop FIS RX"; 966 return rc; 967 } 968 969 return 0; 970 } 971 972 int ahci_reset_controller(struct ata_host *host) 973 { 974 struct ahci_host_priv *hpriv = host->private_data; 975 void __iomem *mmio = hpriv->mmio; 976 u32 tmp; 977 978 /* 979 * We must be in AHCI mode, before using anything AHCI-specific, such 980 * as HOST_RESET. 981 */ 982 ahci_enable_ahci(mmio); 983 984 /* Global controller reset */ 985 if (ahci_skip_host_reset) { 986 dev_info(host->dev, "Skipping global host reset\n"); 987 return 0; 988 } 989 990 tmp = readl(mmio + HOST_CTL); 991 if (!(tmp & HOST_RESET)) { 992 writel(tmp | HOST_RESET, mmio + HOST_CTL); 993 readl(mmio + HOST_CTL); /* flush */ 994 } 995 996 /* 997 * To perform host reset, OS should set HOST_RESET and poll until this 998 * bit is read to be "0". Reset must complete within 1 second, or the 999 * hardware should be considered fried. 1000 */ 1001 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET, 1002 HOST_RESET, 10, 1000); 1003 if (tmp & HOST_RESET) { 1004 dev_err(host->dev, "Controller reset failed (0x%x)\n", 1005 tmp); 1006 return -EIO; 1007 } 1008 1009 /* Turn on AHCI mode */ 1010 ahci_enable_ahci(mmio); 1011 1012 /* Some registers might be cleared on reset. Restore initial values. */ 1013 if (!(hpriv->flags & AHCI_HFLAG_NO_WRITE_TO_RO)) 1014 ahci_restore_initial_config(host); 1015 1016 return 0; 1017 } 1018 EXPORT_SYMBOL_GPL(ahci_reset_controller); 1019 1020 static void ahci_sw_activity(struct ata_link *link) 1021 { 1022 struct ata_port *ap = link->ap; 1023 struct ahci_port_priv *pp = ap->private_data; 1024 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1025 1026 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY)) 1027 return; 1028 1029 emp->activity++; 1030 if (!timer_pending(&emp->timer)) 1031 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10)); 1032 } 1033 1034 static void ahci_sw_activity_blink(struct timer_list *t) 1035 { 1036 struct ahci_em_priv *emp = from_timer(emp, t, timer); 1037 struct ata_link *link = emp->link; 1038 struct ata_port *ap = link->ap; 1039 1040 unsigned long led_message = emp->led_state; 1041 u32 activity_led_state; 1042 unsigned long flags; 1043 1044 led_message &= EM_MSG_LED_VALUE; 1045 led_message |= ap->port_no | (link->pmp << 8); 1046 1047 /* check to see if we've had activity. If so, 1048 * toggle state of LED and reset timer. If not, 1049 * turn LED to desired idle state. 1050 */ 1051 spin_lock_irqsave(ap->lock, flags); 1052 if (emp->saved_activity != emp->activity) { 1053 emp->saved_activity = emp->activity; 1054 /* get the current LED state */ 1055 activity_led_state = led_message & EM_MSG_LED_VALUE_ON; 1056 1057 if (activity_led_state) 1058 activity_led_state = 0; 1059 else 1060 activity_led_state = 1; 1061 1062 /* clear old state */ 1063 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; 1064 1065 /* toggle state */ 1066 led_message |= (activity_led_state << 16); 1067 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100)); 1068 } else { 1069 /* switch to idle */ 1070 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; 1071 if (emp->blink_policy == BLINK_OFF) 1072 led_message |= (1 << 16); 1073 } 1074 spin_unlock_irqrestore(ap->lock, flags); 1075 ap->ops->transmit_led_message(ap, led_message, 4); 1076 } 1077 1078 static void ahci_init_sw_activity(struct ata_link *link) 1079 { 1080 struct ata_port *ap = link->ap; 1081 struct ahci_port_priv *pp = ap->private_data; 1082 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1083 1084 /* init activity stats, setup timer */ 1085 emp->saved_activity = emp->activity = 0; 1086 emp->link = link; 1087 timer_setup(&emp->timer, ahci_sw_activity_blink, 0); 1088 1089 /* check our blink policy and set flag for link if it's enabled */ 1090 if (emp->blink_policy) 1091 link->flags |= ATA_LFLAG_SW_ACTIVITY; 1092 } 1093 1094 int ahci_reset_em(struct ata_host *host) 1095 { 1096 struct ahci_host_priv *hpriv = host->private_data; 1097 void __iomem *mmio = hpriv->mmio; 1098 u32 em_ctl; 1099 1100 em_ctl = readl(mmio + HOST_EM_CTL); 1101 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST)) 1102 return -EINVAL; 1103 1104 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL); 1105 return 0; 1106 } 1107 EXPORT_SYMBOL_GPL(ahci_reset_em); 1108 1109 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, 1110 ssize_t size) 1111 { 1112 struct ahci_host_priv *hpriv = ap->host->private_data; 1113 struct ahci_port_priv *pp = ap->private_data; 1114 void __iomem *mmio = hpriv->mmio; 1115 u32 em_ctl; 1116 u32 message[] = {0, 0}; 1117 unsigned long flags; 1118 int pmp; 1119 struct ahci_em_priv *emp; 1120 1121 /* get the slot number from the message */ 1122 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; 1123 if (pmp < EM_MAX_SLOTS) 1124 emp = &pp->em_priv[pmp]; 1125 else 1126 return -EINVAL; 1127 1128 ahci_rpm_get_port(ap); 1129 spin_lock_irqsave(ap->lock, flags); 1130 1131 /* 1132 * if we are still busy transmitting a previous message, 1133 * do not allow 1134 */ 1135 em_ctl = readl(mmio + HOST_EM_CTL); 1136 if (em_ctl & EM_CTL_TM) { 1137 spin_unlock_irqrestore(ap->lock, flags); 1138 ahci_rpm_put_port(ap); 1139 return -EBUSY; 1140 } 1141 1142 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) { 1143 /* 1144 * create message header - this is all zero except for 1145 * the message size, which is 4 bytes. 1146 */ 1147 message[0] |= (4 << 8); 1148 1149 /* ignore 0:4 of byte zero, fill in port info yourself */ 1150 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no); 1151 1152 /* write message to EM_LOC */ 1153 writel(message[0], mmio + hpriv->em_loc); 1154 writel(message[1], mmio + hpriv->em_loc+4); 1155 1156 /* 1157 * tell hardware to transmit the message 1158 */ 1159 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); 1160 } 1161 1162 /* save off new led state for port/slot */ 1163 emp->led_state = state; 1164 1165 spin_unlock_irqrestore(ap->lock, flags); 1166 ahci_rpm_put_port(ap); 1167 1168 return size; 1169 } 1170 1171 static ssize_t ahci_led_show(struct ata_port *ap, char *buf) 1172 { 1173 struct ahci_port_priv *pp = ap->private_data; 1174 struct ata_link *link; 1175 struct ahci_em_priv *emp; 1176 int rc = 0; 1177 1178 ata_for_each_link(link, ap, EDGE) { 1179 emp = &pp->em_priv[link->pmp]; 1180 rc += sprintf(buf, "%lx\n", emp->led_state); 1181 } 1182 return rc; 1183 } 1184 1185 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, 1186 size_t size) 1187 { 1188 unsigned int state; 1189 int pmp; 1190 struct ahci_port_priv *pp = ap->private_data; 1191 struct ahci_em_priv *emp; 1192 1193 if (kstrtouint(buf, 0, &state) < 0) 1194 return -EINVAL; 1195 1196 /* get the slot number from the message */ 1197 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; 1198 if (pmp < EM_MAX_SLOTS) { 1199 pmp = array_index_nospec(pmp, EM_MAX_SLOTS); 1200 emp = &pp->em_priv[pmp]; 1201 } else { 1202 return -EINVAL; 1203 } 1204 1205 /* mask off the activity bits if we are in sw_activity 1206 * mode, user should turn off sw_activity before setting 1207 * activity led through em_message 1208 */ 1209 if (emp->blink_policy) 1210 state &= ~EM_MSG_LED_VALUE_ACTIVITY; 1211 1212 return ap->ops->transmit_led_message(ap, state, size); 1213 } 1214 1215 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) 1216 { 1217 struct ata_link *link = dev->link; 1218 struct ata_port *ap = link->ap; 1219 struct ahci_port_priv *pp = ap->private_data; 1220 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1221 u32 port_led_state = emp->led_state; 1222 1223 /* save the desired Activity LED behavior */ 1224 if (val == OFF) { 1225 /* clear LFLAG */ 1226 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY); 1227 1228 /* set the LED to OFF */ 1229 port_led_state &= EM_MSG_LED_VALUE_OFF; 1230 port_led_state |= (ap->port_no | (link->pmp << 8)); 1231 ap->ops->transmit_led_message(ap, port_led_state, 4); 1232 } else { 1233 link->flags |= ATA_LFLAG_SW_ACTIVITY; 1234 if (val == BLINK_OFF) { 1235 /* set LED to ON for idle */ 1236 port_led_state &= EM_MSG_LED_VALUE_OFF; 1237 port_led_state |= (ap->port_no | (link->pmp << 8)); 1238 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */ 1239 ap->ops->transmit_led_message(ap, port_led_state, 4); 1240 } 1241 } 1242 emp->blink_policy = val; 1243 return 0; 1244 } 1245 1246 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf) 1247 { 1248 struct ata_link *link = dev->link; 1249 struct ata_port *ap = link->ap; 1250 struct ahci_port_priv *pp = ap->private_data; 1251 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1252 1253 /* display the saved value of activity behavior for this 1254 * disk. 1255 */ 1256 return sprintf(buf, "%d\n", emp->blink_policy); 1257 } 1258 1259 static void ahci_port_clear_pending_irq(struct ata_port *ap) 1260 { 1261 struct ahci_host_priv *hpriv = ap->host->private_data; 1262 void __iomem *port_mmio = ahci_port_base(ap); 1263 u32 tmp; 1264 1265 /* clear SError */ 1266 tmp = readl(port_mmio + PORT_SCR_ERR); 1267 dev_dbg(ap->host->dev, "PORT_SCR_ERR 0x%x\n", tmp); 1268 writel(tmp, port_mmio + PORT_SCR_ERR); 1269 1270 /* clear port IRQ */ 1271 tmp = readl(port_mmio + PORT_IRQ_STAT); 1272 dev_dbg(ap->host->dev, "PORT_IRQ_STAT 0x%x\n", tmp); 1273 if (tmp) 1274 writel(tmp, port_mmio + PORT_IRQ_STAT); 1275 1276 writel(1 << ap->port_no, hpriv->mmio + HOST_IRQ_STAT); 1277 } 1278 1279 static void ahci_port_init(struct device *dev, struct ata_port *ap, 1280 int port_no, void __iomem *mmio, 1281 void __iomem *port_mmio) 1282 { 1283 struct ahci_host_priv *hpriv = ap->host->private_data; 1284 const char *emsg = NULL; 1285 int rc; 1286 u32 tmp; 1287 1288 /* make sure port is not active */ 1289 rc = ahci_deinit_port(ap, &emsg); 1290 if (rc) 1291 dev_warn(dev, "%s (%d)\n", emsg, rc); 1292 1293 ahci_port_clear_pending_irq(ap); 1294 1295 /* mark esata ports */ 1296 tmp = readl(port_mmio + PORT_CMD); 1297 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS)) 1298 ap->pflags |= ATA_PFLAG_EXTERNAL; 1299 } 1300 1301 void ahci_init_controller(struct ata_host *host) 1302 { 1303 struct ahci_host_priv *hpriv = host->private_data; 1304 void __iomem *mmio = hpriv->mmio; 1305 int i; 1306 void __iomem *port_mmio; 1307 u32 tmp; 1308 1309 for (i = 0; i < host->n_ports; i++) { 1310 struct ata_port *ap = host->ports[i]; 1311 1312 port_mmio = ahci_port_base(ap); 1313 if (ata_port_is_dummy(ap)) 1314 continue; 1315 1316 ahci_port_init(host->dev, ap, i, mmio, port_mmio); 1317 } 1318 1319 tmp = readl(mmio + HOST_CTL); 1320 dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp); 1321 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); 1322 tmp = readl(mmio + HOST_CTL); 1323 dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp); 1324 } 1325 EXPORT_SYMBOL_GPL(ahci_init_controller); 1326 1327 static void ahci_dev_config(struct ata_device *dev) 1328 { 1329 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data; 1330 1331 if (hpriv->flags & AHCI_HFLAG_SECT255) { 1332 dev->max_sectors = 255; 1333 ata_dev_info(dev, 1334 "SB600 AHCI: limiting to 255 sectors per cmd\n"); 1335 } 1336 } 1337 1338 unsigned int ahci_dev_classify(struct ata_port *ap) 1339 { 1340 void __iomem *port_mmio = ahci_port_base(ap); 1341 struct ata_taskfile tf; 1342 u32 tmp; 1343 1344 tmp = readl(port_mmio + PORT_SIG); 1345 tf.lbah = (tmp >> 24) & 0xff; 1346 tf.lbam = (tmp >> 16) & 0xff; 1347 tf.lbal = (tmp >> 8) & 0xff; 1348 tf.nsect = (tmp) & 0xff; 1349 1350 return ata_port_classify(ap, &tf); 1351 } 1352 EXPORT_SYMBOL_GPL(ahci_dev_classify); 1353 1354 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, 1355 u32 opts) 1356 { 1357 dma_addr_t cmd_tbl_dma; 1358 1359 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ; 1360 1361 pp->cmd_slot[tag].opts = cpu_to_le32(opts); 1362 pp->cmd_slot[tag].status = 0; 1363 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff); 1364 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16); 1365 } 1366 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot); 1367 1368 int ahci_kick_engine(struct ata_port *ap) 1369 { 1370 void __iomem *port_mmio = ahci_port_base(ap); 1371 struct ahci_host_priv *hpriv = ap->host->private_data; 1372 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1373 u32 tmp; 1374 int busy, rc; 1375 1376 /* stop engine */ 1377 rc = hpriv->stop_engine(ap); 1378 if (rc) 1379 goto out_restart; 1380 1381 /* need to do CLO? 1382 * always do CLO if PMP is attached (AHCI-1.3 9.2) 1383 */ 1384 busy = status & (ATA_BUSY | ATA_DRQ); 1385 if (!busy && !sata_pmp_attached(ap)) { 1386 rc = 0; 1387 goto out_restart; 1388 } 1389 1390 if (!(hpriv->cap & HOST_CAP_CLO)) { 1391 rc = -EOPNOTSUPP; 1392 goto out_restart; 1393 } 1394 1395 /* perform CLO */ 1396 tmp = readl(port_mmio + PORT_CMD); 1397 tmp |= PORT_CMD_CLO; 1398 writel(tmp, port_mmio + PORT_CMD); 1399 1400 rc = 0; 1401 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, 1402 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); 1403 if (tmp & PORT_CMD_CLO) 1404 rc = -EIO; 1405 1406 /* restart engine */ 1407 out_restart: 1408 hpriv->start_engine(ap); 1409 return rc; 1410 } 1411 EXPORT_SYMBOL_GPL(ahci_kick_engine); 1412 1413 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp, 1414 struct ata_taskfile *tf, int is_cmd, u16 flags, 1415 unsigned int timeout_msec) 1416 { 1417 const u32 cmd_fis_len = 5; /* five dwords */ 1418 struct ahci_port_priv *pp = ap->private_data; 1419 void __iomem *port_mmio = ahci_port_base(ap); 1420 u8 *fis = pp->cmd_tbl; 1421 u32 tmp; 1422 1423 /* prep the command */ 1424 ata_tf_to_fis(tf, pmp, is_cmd, fis); 1425 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12)); 1426 1427 /* set port value for softreset of Port Multiplier */ 1428 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) { 1429 tmp = readl(port_mmio + PORT_FBS); 1430 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); 1431 tmp |= pmp << PORT_FBS_DEV_OFFSET; 1432 writel(tmp, port_mmio + PORT_FBS); 1433 pp->fbs_last_dev = pmp; 1434 } 1435 1436 /* issue & wait */ 1437 writel(1, port_mmio + PORT_CMD_ISSUE); 1438 1439 if (timeout_msec) { 1440 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE, 1441 0x1, 0x1, 1, timeout_msec); 1442 if (tmp & 0x1) { 1443 ahci_kick_engine(ap); 1444 return -EBUSY; 1445 } 1446 } else 1447 readl(port_mmio + PORT_CMD_ISSUE); /* flush */ 1448 1449 return 0; 1450 } 1451 1452 int ahci_do_softreset(struct ata_link *link, unsigned int *class, 1453 int pmp, unsigned long deadline, 1454 int (*check_ready)(struct ata_link *link)) 1455 { 1456 struct ata_port *ap = link->ap; 1457 struct ahci_host_priv *hpriv = ap->host->private_data; 1458 struct ahci_port_priv *pp = ap->private_data; 1459 const char *reason = NULL; 1460 unsigned long now; 1461 unsigned int msecs; 1462 struct ata_taskfile tf; 1463 bool fbs_disabled = false; 1464 int rc; 1465 1466 /* prepare for SRST (AHCI-1.1 10.4.1) */ 1467 rc = ahci_kick_engine(ap); 1468 if (rc && rc != -EOPNOTSUPP) 1469 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc); 1470 1471 /* 1472 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall 1473 * clear PxFBS.EN to '0' prior to issuing software reset to devices 1474 * that is attached to port multiplier. 1475 */ 1476 if (!ata_is_host_link(link) && pp->fbs_enabled) { 1477 ahci_disable_fbs(ap); 1478 fbs_disabled = true; 1479 } 1480 1481 ata_tf_init(link->device, &tf); 1482 1483 /* issue the first H2D Register FIS */ 1484 msecs = 0; 1485 now = jiffies; 1486 if (time_after(deadline, now)) 1487 msecs = jiffies_to_msecs(deadline - now); 1488 1489 tf.ctl |= ATA_SRST; 1490 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0, 1491 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) { 1492 rc = -EIO; 1493 reason = "1st FIS failed"; 1494 goto fail; 1495 } 1496 1497 /* spec says at least 5us, but be generous and sleep for 1ms */ 1498 ata_msleep(ap, 1); 1499 1500 /* issue the second H2D Register FIS */ 1501 tf.ctl &= ~ATA_SRST; 1502 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0); 1503 1504 /* wait for link to become ready */ 1505 rc = ata_wait_after_reset(link, deadline, check_ready); 1506 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) { 1507 /* 1508 * Workaround for cases where link online status can't 1509 * be trusted. Treat device readiness timeout as link 1510 * offline. 1511 */ 1512 ata_link_info(link, "device not ready, treating as offline\n"); 1513 *class = ATA_DEV_NONE; 1514 } else if (rc) { 1515 /* link occupied, -ENODEV too is an error */ 1516 reason = "device not ready"; 1517 goto fail; 1518 } else 1519 *class = ahci_dev_classify(ap); 1520 1521 /* re-enable FBS if disabled before */ 1522 if (fbs_disabled) 1523 ahci_enable_fbs(ap); 1524 1525 return 0; 1526 1527 fail: 1528 ata_link_err(link, "softreset failed (%s)\n", reason); 1529 return rc; 1530 } 1531 1532 int ahci_check_ready(struct ata_link *link) 1533 { 1534 void __iomem *port_mmio = ahci_port_base(link->ap); 1535 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1536 1537 return ata_check_ready(status); 1538 } 1539 EXPORT_SYMBOL_GPL(ahci_check_ready); 1540 1541 static int ahci_softreset(struct ata_link *link, unsigned int *class, 1542 unsigned long deadline) 1543 { 1544 int pmp = sata_srst_pmp(link); 1545 1546 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready); 1547 } 1548 EXPORT_SYMBOL_GPL(ahci_do_softreset); 1549 1550 static int ahci_bad_pmp_check_ready(struct ata_link *link) 1551 { 1552 void __iomem *port_mmio = ahci_port_base(link->ap); 1553 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1554 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT); 1555 1556 /* 1557 * There is no need to check TFDATA if BAD PMP is found due to HW bug, 1558 * which can save timeout delay. 1559 */ 1560 if (irq_status & PORT_IRQ_BAD_PMP) 1561 return -EIO; 1562 1563 return ata_check_ready(status); 1564 } 1565 1566 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, 1567 unsigned long deadline) 1568 { 1569 struct ata_port *ap = link->ap; 1570 void __iomem *port_mmio = ahci_port_base(ap); 1571 int pmp = sata_srst_pmp(link); 1572 int rc; 1573 u32 irq_sts; 1574 1575 rc = ahci_do_softreset(link, class, pmp, deadline, 1576 ahci_bad_pmp_check_ready); 1577 1578 /* 1579 * Soft reset fails with IPMS set when PMP is enabled but 1580 * SATA HDD/ODD is connected to SATA port, do soft reset 1581 * again to port 0. 1582 */ 1583 if (rc == -EIO) { 1584 irq_sts = readl(port_mmio + PORT_IRQ_STAT); 1585 if (irq_sts & PORT_IRQ_BAD_PMP) { 1586 ata_link_warn(link, 1587 "applying PMP SRST workaround " 1588 "and retrying\n"); 1589 rc = ahci_do_softreset(link, class, 0, deadline, 1590 ahci_check_ready); 1591 } 1592 } 1593 1594 return rc; 1595 } 1596 1597 int ahci_do_hardreset(struct ata_link *link, unsigned int *class, 1598 unsigned long deadline, bool *online) 1599 { 1600 const unsigned int *timing = sata_ehc_deb_timing(&link->eh_context); 1601 struct ata_port *ap = link->ap; 1602 struct ahci_port_priv *pp = ap->private_data; 1603 struct ahci_host_priv *hpriv = ap->host->private_data; 1604 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; 1605 struct ata_taskfile tf; 1606 int rc; 1607 1608 hpriv->stop_engine(ap); 1609 1610 /* clear D2H reception area to properly wait for D2H FIS */ 1611 ata_tf_init(link->device, &tf); 1612 tf.status = ATA_BUSY; 1613 ata_tf_to_fis(&tf, 0, 0, d2h_fis); 1614 1615 ahci_port_clear_pending_irq(ap); 1616 1617 rc = sata_link_hardreset(link, timing, deadline, online, 1618 ahci_check_ready); 1619 1620 hpriv->start_engine(ap); 1621 1622 if (*online) 1623 *class = ahci_dev_classify(ap); 1624 1625 return rc; 1626 } 1627 EXPORT_SYMBOL_GPL(ahci_do_hardreset); 1628 1629 static int ahci_hardreset(struct ata_link *link, unsigned int *class, 1630 unsigned long deadline) 1631 { 1632 bool online; 1633 1634 return ahci_do_hardreset(link, class, deadline, &online); 1635 } 1636 1637 static void ahci_postreset(struct ata_link *link, unsigned int *class) 1638 { 1639 struct ata_port *ap = link->ap; 1640 void __iomem *port_mmio = ahci_port_base(ap); 1641 u32 new_tmp, tmp; 1642 1643 ata_std_postreset(link, class); 1644 1645 /* Make sure port's ATAPI bit is set appropriately */ 1646 new_tmp = tmp = readl(port_mmio + PORT_CMD); 1647 if (*class == ATA_DEV_ATAPI) 1648 new_tmp |= PORT_CMD_ATAPI; 1649 else 1650 new_tmp &= ~PORT_CMD_ATAPI; 1651 if (new_tmp != tmp) { 1652 writel(new_tmp, port_mmio + PORT_CMD); 1653 readl(port_mmio + PORT_CMD); /* flush */ 1654 } 1655 } 1656 1657 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) 1658 { 1659 struct scatterlist *sg; 1660 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; 1661 unsigned int si; 1662 1663 /* 1664 * Next, the S/G list. 1665 */ 1666 for_each_sg(qc->sg, sg, qc->n_elem, si) { 1667 dma_addr_t addr = sg_dma_address(sg); 1668 u32 sg_len = sg_dma_len(sg); 1669 1670 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff); 1671 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16); 1672 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1); 1673 } 1674 1675 return si; 1676 } 1677 1678 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc) 1679 { 1680 struct ata_port *ap = qc->ap; 1681 struct ahci_port_priv *pp = ap->private_data; 1682 1683 if (!sata_pmp_attached(ap) || pp->fbs_enabled) 1684 return ata_std_qc_defer(qc); 1685 else 1686 return sata_pmp_qc_defer_cmd_switch(qc); 1687 } 1688 1689 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc) 1690 { 1691 struct ata_port *ap = qc->ap; 1692 struct ahci_port_priv *pp = ap->private_data; 1693 int is_atapi = ata_is_atapi(qc->tf.protocol); 1694 void *cmd_tbl; 1695 u32 opts; 1696 const u32 cmd_fis_len = 5; /* five dwords */ 1697 unsigned int n_elem; 1698 1699 /* 1700 * Fill in command table information. First, the header, 1701 * a SATA Register - Host to Device command FIS. 1702 */ 1703 cmd_tbl = pp->cmd_tbl + qc->hw_tag * AHCI_CMD_TBL_SZ; 1704 1705 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl); 1706 if (is_atapi) { 1707 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); 1708 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); 1709 } 1710 1711 n_elem = 0; 1712 if (qc->flags & ATA_QCFLAG_DMAMAP) 1713 n_elem = ahci_fill_sg(qc, cmd_tbl); 1714 1715 /* 1716 * Fill in command slot information. 1717 */ 1718 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12); 1719 if (qc->tf.flags & ATA_TFLAG_WRITE) 1720 opts |= AHCI_CMD_WRITE; 1721 if (is_atapi) 1722 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; 1723 1724 ahci_fill_cmd_slot(pp, qc->hw_tag, opts); 1725 1726 return AC_ERR_OK; 1727 } 1728 1729 static void ahci_fbs_dec_intr(struct ata_port *ap) 1730 { 1731 struct ahci_port_priv *pp = ap->private_data; 1732 void __iomem *port_mmio = ahci_port_base(ap); 1733 u32 fbs = readl(port_mmio + PORT_FBS); 1734 int retries = 3; 1735 1736 BUG_ON(!pp->fbs_enabled); 1737 1738 /* time to wait for DEC is not specified by AHCI spec, 1739 * add a retry loop for safety. 1740 */ 1741 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS); 1742 fbs = readl(port_mmio + PORT_FBS); 1743 while ((fbs & PORT_FBS_DEC) && retries--) { 1744 udelay(1); 1745 fbs = readl(port_mmio + PORT_FBS); 1746 } 1747 1748 if (fbs & PORT_FBS_DEC) 1749 dev_err(ap->host->dev, "failed to clear device error\n"); 1750 } 1751 1752 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) 1753 { 1754 struct ahci_host_priv *hpriv = ap->host->private_data; 1755 struct ahci_port_priv *pp = ap->private_data; 1756 struct ata_eh_info *host_ehi = &ap->link.eh_info; 1757 struct ata_link *link = NULL; 1758 struct ata_queued_cmd *active_qc; 1759 struct ata_eh_info *active_ehi; 1760 bool fbs_need_dec = false; 1761 u32 serror; 1762 1763 /* determine active link with error */ 1764 if (pp->fbs_enabled) { 1765 void __iomem *port_mmio = ahci_port_base(ap); 1766 u32 fbs = readl(port_mmio + PORT_FBS); 1767 int pmp = fbs >> PORT_FBS_DWE_OFFSET; 1768 1769 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) { 1770 link = &ap->pmp_link[pmp]; 1771 fbs_need_dec = true; 1772 } 1773 1774 } else 1775 ata_for_each_link(link, ap, EDGE) 1776 if (ata_link_active(link)) 1777 break; 1778 1779 if (!link) 1780 link = &ap->link; 1781 1782 active_qc = ata_qc_from_tag(ap, link->active_tag); 1783 active_ehi = &link->eh_info; 1784 1785 /* record irq stat */ 1786 ata_ehi_clear_desc(host_ehi); 1787 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); 1788 1789 /* AHCI needs SError cleared; otherwise, it might lock up */ 1790 ahci_scr_read(&ap->link, SCR_ERROR, &serror); 1791 ahci_scr_write(&ap->link, SCR_ERROR, serror); 1792 host_ehi->serror |= serror; 1793 1794 /* some controllers set IRQ_IF_ERR on device errors, ignore it */ 1795 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR) 1796 irq_stat &= ~PORT_IRQ_IF_ERR; 1797 1798 if (irq_stat & PORT_IRQ_TF_ERR) { 1799 /* If qc is active, charge it; otherwise, the active 1800 * link. There's no active qc on NCQ errors. It will 1801 * be determined by EH by reading log page 10h. 1802 */ 1803 if (active_qc) 1804 active_qc->err_mask |= AC_ERR_DEV; 1805 else 1806 active_ehi->err_mask |= AC_ERR_DEV; 1807 1808 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL) 1809 host_ehi->serror &= ~SERR_INTERNAL; 1810 } 1811 1812 if (irq_stat & PORT_IRQ_UNK_FIS) { 1813 u32 *unk = pp->rx_fis + RX_FIS_UNK; 1814 1815 active_ehi->err_mask |= AC_ERR_HSM; 1816 active_ehi->action |= ATA_EH_RESET; 1817 ata_ehi_push_desc(active_ehi, 1818 "unknown FIS %08x %08x %08x %08x" , 1819 unk[0], unk[1], unk[2], unk[3]); 1820 } 1821 1822 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) { 1823 active_ehi->err_mask |= AC_ERR_HSM; 1824 active_ehi->action |= ATA_EH_RESET; 1825 ata_ehi_push_desc(active_ehi, "incorrect PMP"); 1826 } 1827 1828 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { 1829 host_ehi->err_mask |= AC_ERR_HOST_BUS; 1830 host_ehi->action |= ATA_EH_RESET; 1831 ata_ehi_push_desc(host_ehi, "host bus error"); 1832 } 1833 1834 if (irq_stat & PORT_IRQ_IF_ERR) { 1835 if (fbs_need_dec) 1836 active_ehi->err_mask |= AC_ERR_DEV; 1837 else { 1838 host_ehi->err_mask |= AC_ERR_ATA_BUS; 1839 host_ehi->action |= ATA_EH_RESET; 1840 } 1841 1842 ata_ehi_push_desc(host_ehi, "interface fatal error"); 1843 } 1844 1845 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { 1846 ata_ehi_hotplugged(host_ehi); 1847 ata_ehi_push_desc(host_ehi, "%s", 1848 irq_stat & PORT_IRQ_CONNECT ? 1849 "connection status changed" : "PHY RDY changed"); 1850 } 1851 1852 /* okay, let's hand over to EH */ 1853 1854 if (irq_stat & PORT_IRQ_FREEZE) 1855 ata_port_freeze(ap); 1856 else if (fbs_need_dec) { 1857 ata_link_abort(link); 1858 ahci_fbs_dec_intr(ap); 1859 } else 1860 ata_port_abort(ap); 1861 } 1862 1863 static void ahci_qc_complete(struct ata_port *ap, void __iomem *port_mmio) 1864 { 1865 struct ata_eh_info *ehi = &ap->link.eh_info; 1866 struct ahci_port_priv *pp = ap->private_data; 1867 u32 qc_active = 0; 1868 int rc; 1869 1870 /* 1871 * pp->active_link is not reliable once FBS is enabled, both 1872 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because 1873 * NCQ and non-NCQ commands may be in flight at the same time. 1874 */ 1875 if (pp->fbs_enabled) { 1876 if (ap->qc_active) { 1877 qc_active = readl(port_mmio + PORT_SCR_ACT); 1878 qc_active |= readl(port_mmio + PORT_CMD_ISSUE); 1879 } 1880 } else { 1881 /* pp->active_link is valid iff any command is in flight */ 1882 if (ap->qc_active && pp->active_link->sactive) 1883 qc_active = readl(port_mmio + PORT_SCR_ACT); 1884 else 1885 qc_active = readl(port_mmio + PORT_CMD_ISSUE); 1886 } 1887 1888 rc = ata_qc_complete_multiple(ap, qc_active); 1889 if (unlikely(rc < 0 && !(ap->pflags & ATA_PFLAG_RESETTING))) { 1890 ehi->err_mask |= AC_ERR_HSM; 1891 ehi->action |= ATA_EH_RESET; 1892 ata_port_freeze(ap); 1893 } 1894 } 1895 1896 static void ahci_handle_port_interrupt(struct ata_port *ap, 1897 void __iomem *port_mmio, u32 status) 1898 { 1899 struct ahci_port_priv *pp = ap->private_data; 1900 struct ahci_host_priv *hpriv = ap->host->private_data; 1901 1902 /* ignore BAD_PMP while resetting */ 1903 if (unlikely(ap->pflags & ATA_PFLAG_RESETTING)) 1904 status &= ~PORT_IRQ_BAD_PMP; 1905 1906 if (sata_lpm_ignore_phy_events(&ap->link)) { 1907 status &= ~PORT_IRQ_PHYRDY; 1908 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG); 1909 } 1910 1911 if (unlikely(status & PORT_IRQ_ERROR)) { 1912 /* 1913 * Before getting the error notification, we may have 1914 * received SDB FISes notifying successful completions. 1915 * Handle these first and then handle the error. 1916 */ 1917 ahci_qc_complete(ap, port_mmio); 1918 ahci_error_intr(ap, status); 1919 return; 1920 } 1921 1922 if (status & PORT_IRQ_SDB_FIS) { 1923 /* If SNotification is available, leave notification 1924 * handling to sata_async_notification(). If not, 1925 * emulate it by snooping SDB FIS RX area. 1926 * 1927 * Snooping FIS RX area is probably cheaper than 1928 * poking SNotification but some constrollers which 1929 * implement SNotification, ICH9 for example, don't 1930 * store AN SDB FIS into receive area. 1931 */ 1932 if (hpriv->cap & HOST_CAP_SNTF) 1933 sata_async_notification(ap); 1934 else { 1935 /* If the 'N' bit in word 0 of the FIS is set, 1936 * we just received asynchronous notification. 1937 * Tell libata about it. 1938 * 1939 * Lack of SNotification should not appear in 1940 * ahci 1.2, so the workaround is unnecessary 1941 * when FBS is enabled. 1942 */ 1943 if (pp->fbs_enabled) 1944 WARN_ON_ONCE(1); 1945 else { 1946 const __le32 *f = pp->rx_fis + RX_FIS_SDB; 1947 u32 f0 = le32_to_cpu(f[0]); 1948 if (f0 & (1 << 15)) 1949 sata_async_notification(ap); 1950 } 1951 } 1952 } 1953 1954 /* Handle completed commands */ 1955 ahci_qc_complete(ap, port_mmio); 1956 } 1957 1958 static void ahci_port_intr(struct ata_port *ap) 1959 { 1960 void __iomem *port_mmio = ahci_port_base(ap); 1961 u32 status; 1962 1963 status = readl(port_mmio + PORT_IRQ_STAT); 1964 writel(status, port_mmio + PORT_IRQ_STAT); 1965 1966 ahci_handle_port_interrupt(ap, port_mmio, status); 1967 } 1968 1969 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance) 1970 { 1971 struct ata_port *ap = dev_instance; 1972 void __iomem *port_mmio = ahci_port_base(ap); 1973 u32 status; 1974 1975 status = readl(port_mmio + PORT_IRQ_STAT); 1976 writel(status, port_mmio + PORT_IRQ_STAT); 1977 1978 spin_lock(ap->lock); 1979 ahci_handle_port_interrupt(ap, port_mmio, status); 1980 spin_unlock(ap->lock); 1981 1982 return IRQ_HANDLED; 1983 } 1984 1985 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked) 1986 { 1987 unsigned int i, handled = 0; 1988 1989 for (i = 0; i < host->n_ports; i++) { 1990 struct ata_port *ap; 1991 1992 if (!(irq_masked & (1 << i))) 1993 continue; 1994 1995 ap = host->ports[i]; 1996 if (ap) { 1997 ahci_port_intr(ap); 1998 } else { 1999 if (ata_ratelimit()) 2000 dev_warn(host->dev, 2001 "interrupt on disabled port %u\n", i); 2002 } 2003 2004 handled = 1; 2005 } 2006 2007 return handled; 2008 } 2009 EXPORT_SYMBOL_GPL(ahci_handle_port_intr); 2010 2011 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance) 2012 { 2013 struct ata_host *host = dev_instance; 2014 struct ahci_host_priv *hpriv; 2015 unsigned int rc = 0; 2016 void __iomem *mmio; 2017 u32 irq_stat, irq_masked; 2018 2019 hpriv = host->private_data; 2020 mmio = hpriv->mmio; 2021 2022 /* sigh. 0xffffffff is a valid return from h/w */ 2023 irq_stat = readl(mmio + HOST_IRQ_STAT); 2024 if (!irq_stat) 2025 return IRQ_NONE; 2026 2027 irq_masked = irq_stat & hpriv->port_map; 2028 2029 spin_lock(&host->lock); 2030 2031 rc = ahci_handle_port_intr(host, irq_masked); 2032 2033 /* HOST_IRQ_STAT behaves as level triggered latch meaning that 2034 * it should be cleared after all the port events are cleared; 2035 * otherwise, it will raise a spurious interrupt after each 2036 * valid one. Please read section 10.6.2 of ahci 1.1 for more 2037 * information. 2038 * 2039 * Also, use the unmasked value to clear interrupt as spurious 2040 * pending event on a dummy port might cause screaming IRQ. 2041 */ 2042 writel(irq_stat, mmio + HOST_IRQ_STAT); 2043 2044 spin_unlock(&host->lock); 2045 2046 return IRQ_RETVAL(rc); 2047 } 2048 2049 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) 2050 { 2051 struct ata_port *ap = qc->ap; 2052 void __iomem *port_mmio = ahci_port_base(ap); 2053 struct ahci_port_priv *pp = ap->private_data; 2054 2055 /* Keep track of the currently active link. It will be used 2056 * in completion path to determine whether NCQ phase is in 2057 * progress. 2058 */ 2059 pp->active_link = qc->dev->link; 2060 2061 if (ata_is_ncq(qc->tf.protocol)) 2062 writel(1 << qc->hw_tag, port_mmio + PORT_SCR_ACT); 2063 2064 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) { 2065 u32 fbs = readl(port_mmio + PORT_FBS); 2066 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); 2067 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET; 2068 writel(fbs, port_mmio + PORT_FBS); 2069 pp->fbs_last_dev = qc->dev->link->pmp; 2070 } 2071 2072 writel(1 << qc->hw_tag, port_mmio + PORT_CMD_ISSUE); 2073 2074 ahci_sw_activity(qc->dev->link); 2075 2076 return 0; 2077 } 2078 EXPORT_SYMBOL_GPL(ahci_qc_issue); 2079 2080 static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc) 2081 { 2082 struct ahci_port_priv *pp = qc->ap->private_data; 2083 u8 *rx_fis = pp->rx_fis; 2084 2085 /* 2086 * rtf may already be filled (e.g. for successful NCQ commands). 2087 * If that is the case, we have nothing to do. 2088 */ 2089 if (qc->flags & ATA_QCFLAG_RTF_FILLED) 2090 return; 2091 2092 if (pp->fbs_enabled) 2093 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; 2094 2095 /* 2096 * After a successful execution of an ATA PIO data-in command, 2097 * the device doesn't send D2H Reg FIS to update the TF and 2098 * the host should take TF and E_Status from the preceding PIO 2099 * Setup FIS. 2100 */ 2101 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE && 2102 !(qc->flags & ATA_QCFLAG_EH)) { 2103 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf); 2104 qc->result_tf.status = (rx_fis + RX_FIS_PIO_SETUP)[15]; 2105 qc->flags |= ATA_QCFLAG_RTF_FILLED; 2106 return; 2107 } 2108 2109 /* 2110 * For NCQ commands, we never get a D2H FIS, so reading the D2H Register 2111 * FIS area of the Received FIS Structure (which contains a copy of the 2112 * last D2H FIS received) will contain an outdated status code. 2113 * For NCQ commands, we instead get a SDB FIS, so read the SDB FIS area 2114 * instead. However, the SDB FIS does not contain the LBA, so we can't 2115 * use the ata_tf_from_fis() helper. 2116 */ 2117 if (ata_is_ncq(qc->tf.protocol)) { 2118 const u8 *fis = rx_fis + RX_FIS_SDB; 2119 2120 /* 2121 * Successful NCQ commands have been filled already. 2122 * A failed NCQ command will read the status here. 2123 * (Note that a failed NCQ command will get a more specific 2124 * error when reading the NCQ Command Error log.) 2125 */ 2126 qc->result_tf.status = fis[2]; 2127 qc->result_tf.error = fis[3]; 2128 qc->flags |= ATA_QCFLAG_RTF_FILLED; 2129 return; 2130 } 2131 2132 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf); 2133 qc->flags |= ATA_QCFLAG_RTF_FILLED; 2134 } 2135 2136 static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask) 2137 { 2138 struct ahci_port_priv *pp = ap->private_data; 2139 const u8 *fis; 2140 2141 /* No outstanding commands. */ 2142 if (!ap->qc_active) 2143 return; 2144 2145 /* 2146 * FBS not enabled, so read status and error once, since they are shared 2147 * for all QCs. 2148 */ 2149 if (!pp->fbs_enabled) { 2150 u8 status, error; 2151 2152 /* No outstanding NCQ commands. */ 2153 if (!pp->active_link->sactive) 2154 return; 2155 2156 fis = pp->rx_fis + RX_FIS_SDB; 2157 status = fis[2]; 2158 error = fis[3]; 2159 2160 while (done_mask) { 2161 struct ata_queued_cmd *qc; 2162 unsigned int tag = __ffs64(done_mask); 2163 2164 qc = ata_qc_from_tag(ap, tag); 2165 if (qc && ata_is_ncq(qc->tf.protocol)) { 2166 qc->result_tf.status = status; 2167 qc->result_tf.error = error; 2168 qc->flags |= ATA_QCFLAG_RTF_FILLED; 2169 } 2170 done_mask &= ~(1ULL << tag); 2171 } 2172 2173 return; 2174 } 2175 2176 /* 2177 * FBS enabled, so read the status and error for each QC, since the QCs 2178 * can belong to different PMP links. (Each PMP link has its own FIS 2179 * Receive Area.) 2180 */ 2181 while (done_mask) { 2182 struct ata_queued_cmd *qc; 2183 unsigned int tag = __ffs64(done_mask); 2184 2185 qc = ata_qc_from_tag(ap, tag); 2186 if (qc && ata_is_ncq(qc->tf.protocol)) { 2187 fis = pp->rx_fis; 2188 fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; 2189 fis += RX_FIS_SDB; 2190 qc->result_tf.status = fis[2]; 2191 qc->result_tf.error = fis[3]; 2192 qc->flags |= ATA_QCFLAG_RTF_FILLED; 2193 } 2194 done_mask &= ~(1ULL << tag); 2195 } 2196 } 2197 2198 static void ahci_freeze(struct ata_port *ap) 2199 { 2200 void __iomem *port_mmio = ahci_port_base(ap); 2201 2202 /* turn IRQ off */ 2203 writel(0, port_mmio + PORT_IRQ_MASK); 2204 } 2205 2206 static void ahci_thaw(struct ata_port *ap) 2207 { 2208 struct ahci_host_priv *hpriv = ap->host->private_data; 2209 void __iomem *mmio = hpriv->mmio; 2210 void __iomem *port_mmio = ahci_port_base(ap); 2211 u32 tmp; 2212 struct ahci_port_priv *pp = ap->private_data; 2213 2214 /* clear IRQ */ 2215 tmp = readl(port_mmio + PORT_IRQ_STAT); 2216 writel(tmp, port_mmio + PORT_IRQ_STAT); 2217 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT); 2218 2219 /* turn IRQ back on */ 2220 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2221 } 2222 2223 void ahci_error_handler(struct ata_port *ap) 2224 { 2225 struct ahci_host_priv *hpriv = ap->host->private_data; 2226 2227 if (!ata_port_is_frozen(ap)) { 2228 /* restart engine */ 2229 hpriv->stop_engine(ap); 2230 hpriv->start_engine(ap); 2231 } 2232 2233 sata_pmp_error_handler(ap); 2234 2235 if (!ata_dev_enabled(ap->link.device)) 2236 hpriv->stop_engine(ap); 2237 } 2238 EXPORT_SYMBOL_GPL(ahci_error_handler); 2239 2240 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) 2241 { 2242 struct ata_port *ap = qc->ap; 2243 2244 /* make DMA engine forget about the failed command */ 2245 if (qc->flags & ATA_QCFLAG_EH) 2246 ahci_kick_engine(ap); 2247 } 2248 2249 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep) 2250 { 2251 struct ahci_host_priv *hpriv = ap->host->private_data; 2252 void __iomem *port_mmio = ahci_port_base(ap); 2253 struct ata_device *dev = ap->link.device; 2254 u32 devslp, dm, dito, mdat, deto, dito_conf; 2255 int rc; 2256 unsigned int err_mask; 2257 2258 devslp = readl(port_mmio + PORT_DEVSLP); 2259 if (!(devslp & PORT_DEVSLP_DSP)) { 2260 dev_info(ap->host->dev, "port does not support device sleep\n"); 2261 return; 2262 } 2263 2264 /* disable device sleep */ 2265 if (!sleep) { 2266 if (devslp & PORT_DEVSLP_ADSE) { 2267 writel(devslp & ~PORT_DEVSLP_ADSE, 2268 port_mmio + PORT_DEVSLP); 2269 err_mask = ata_dev_set_feature(dev, 2270 SETFEATURES_SATA_DISABLE, 2271 SATA_DEVSLP); 2272 if (err_mask && err_mask != AC_ERR_DEV) 2273 ata_dev_warn(dev, "failed to disable DEVSLP\n"); 2274 } 2275 return; 2276 } 2277 2278 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET; 2279 dito = devslp_idle_timeout / (dm + 1); 2280 if (dito > 0x3ff) 2281 dito = 0x3ff; 2282 2283 dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF; 2284 2285 /* device sleep was already enabled and same dito */ 2286 if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito)) 2287 return; 2288 2289 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */ 2290 rc = hpriv->stop_engine(ap); 2291 if (rc) 2292 return; 2293 2294 /* Use the nominal value 10 ms if the read MDAT is zero, 2295 * the nominal value of DETO is 20 ms. 2296 */ 2297 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] & 2298 ATA_LOG_DEVSLP_VALID_MASK) { 2299 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] & 2300 ATA_LOG_DEVSLP_MDAT_MASK; 2301 if (!mdat) 2302 mdat = 10; 2303 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO]; 2304 if (!deto) 2305 deto = 20; 2306 } else { 2307 mdat = 10; 2308 deto = 20; 2309 } 2310 2311 /* Make dito, mdat, deto bits to 0s */ 2312 devslp &= ~GENMASK_ULL(24, 2); 2313 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) | 2314 (mdat << PORT_DEVSLP_MDAT_OFFSET) | 2315 (deto << PORT_DEVSLP_DETO_OFFSET) | 2316 PORT_DEVSLP_ADSE); 2317 writel(devslp, port_mmio + PORT_DEVSLP); 2318 2319 hpriv->start_engine(ap); 2320 2321 /* enable device sleep feature for the drive */ 2322 err_mask = ata_dev_set_feature(dev, 2323 SETFEATURES_SATA_ENABLE, 2324 SATA_DEVSLP); 2325 if (err_mask && err_mask != AC_ERR_DEV) 2326 ata_dev_warn(dev, "failed to enable DEVSLP\n"); 2327 } 2328 2329 static void ahci_enable_fbs(struct ata_port *ap) 2330 { 2331 struct ahci_host_priv *hpriv = ap->host->private_data; 2332 struct ahci_port_priv *pp = ap->private_data; 2333 void __iomem *port_mmio = ahci_port_base(ap); 2334 u32 fbs; 2335 int rc; 2336 2337 if (!pp->fbs_supported) 2338 return; 2339 2340 fbs = readl(port_mmio + PORT_FBS); 2341 if (fbs & PORT_FBS_EN) { 2342 pp->fbs_enabled = true; 2343 pp->fbs_last_dev = -1; /* initialization */ 2344 return; 2345 } 2346 2347 rc = hpriv->stop_engine(ap); 2348 if (rc) 2349 return; 2350 2351 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS); 2352 fbs = readl(port_mmio + PORT_FBS); 2353 if (fbs & PORT_FBS_EN) { 2354 dev_info(ap->host->dev, "FBS is enabled\n"); 2355 pp->fbs_enabled = true; 2356 pp->fbs_last_dev = -1; /* initialization */ 2357 } else 2358 dev_err(ap->host->dev, "Failed to enable FBS\n"); 2359 2360 hpriv->start_engine(ap); 2361 } 2362 2363 static void ahci_disable_fbs(struct ata_port *ap) 2364 { 2365 struct ahci_host_priv *hpriv = ap->host->private_data; 2366 struct ahci_port_priv *pp = ap->private_data; 2367 void __iomem *port_mmio = ahci_port_base(ap); 2368 u32 fbs; 2369 int rc; 2370 2371 if (!pp->fbs_supported) 2372 return; 2373 2374 fbs = readl(port_mmio + PORT_FBS); 2375 if ((fbs & PORT_FBS_EN) == 0) { 2376 pp->fbs_enabled = false; 2377 return; 2378 } 2379 2380 rc = hpriv->stop_engine(ap); 2381 if (rc) 2382 return; 2383 2384 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS); 2385 fbs = readl(port_mmio + PORT_FBS); 2386 if (fbs & PORT_FBS_EN) 2387 dev_err(ap->host->dev, "Failed to disable FBS\n"); 2388 else { 2389 dev_info(ap->host->dev, "FBS is disabled\n"); 2390 pp->fbs_enabled = false; 2391 } 2392 2393 hpriv->start_engine(ap); 2394 } 2395 2396 static void ahci_pmp_attach(struct ata_port *ap) 2397 { 2398 void __iomem *port_mmio = ahci_port_base(ap); 2399 struct ahci_port_priv *pp = ap->private_data; 2400 u32 cmd; 2401 2402 cmd = readl(port_mmio + PORT_CMD); 2403 cmd |= PORT_CMD_PMP; 2404 writel(cmd, port_mmio + PORT_CMD); 2405 2406 ahci_enable_fbs(ap); 2407 2408 pp->intr_mask |= PORT_IRQ_BAD_PMP; 2409 2410 /* 2411 * We must not change the port interrupt mask register if the 2412 * port is marked frozen, the value in pp->intr_mask will be 2413 * restored later when the port is thawed. 2414 * 2415 * Note that during initialization, the port is marked as 2416 * frozen since the irq handler is not yet registered. 2417 */ 2418 if (!ata_port_is_frozen(ap)) 2419 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2420 } 2421 2422 static void ahci_pmp_detach(struct ata_port *ap) 2423 { 2424 void __iomem *port_mmio = ahci_port_base(ap); 2425 struct ahci_port_priv *pp = ap->private_data; 2426 u32 cmd; 2427 2428 ahci_disable_fbs(ap); 2429 2430 cmd = readl(port_mmio + PORT_CMD); 2431 cmd &= ~PORT_CMD_PMP; 2432 writel(cmd, port_mmio + PORT_CMD); 2433 2434 pp->intr_mask &= ~PORT_IRQ_BAD_PMP; 2435 2436 /* see comment above in ahci_pmp_attach() */ 2437 if (!ata_port_is_frozen(ap)) 2438 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2439 } 2440 2441 int ahci_port_resume(struct ata_port *ap) 2442 { 2443 ahci_rpm_get_port(ap); 2444 2445 ahci_power_up(ap); 2446 ahci_start_port(ap); 2447 2448 if (sata_pmp_attached(ap)) 2449 ahci_pmp_attach(ap); 2450 else 2451 ahci_pmp_detach(ap); 2452 2453 return 0; 2454 } 2455 EXPORT_SYMBOL_GPL(ahci_port_resume); 2456 2457 #ifdef CONFIG_PM 2458 static void ahci_handle_s2idle(struct ata_port *ap) 2459 { 2460 void __iomem *port_mmio = ahci_port_base(ap); 2461 u32 devslp; 2462 2463 if (pm_suspend_via_firmware()) 2464 return; 2465 devslp = readl(port_mmio + PORT_DEVSLP); 2466 if ((devslp & PORT_DEVSLP_ADSE)) 2467 ata_msleep(ap, devslp_idle_timeout); 2468 } 2469 2470 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) 2471 { 2472 const char *emsg = NULL; 2473 int rc; 2474 2475 rc = ahci_deinit_port(ap, &emsg); 2476 if (rc == 0) 2477 ahci_power_down(ap); 2478 else { 2479 ata_port_err(ap, "%s (%d)\n", emsg, rc); 2480 ata_port_freeze(ap); 2481 } 2482 2483 if (acpi_storage_d3(ap->host->dev)) 2484 ahci_handle_s2idle(ap); 2485 2486 ahci_rpm_put_port(ap); 2487 return rc; 2488 } 2489 #endif 2490 2491 static int ahci_port_start(struct ata_port *ap) 2492 { 2493 struct ahci_host_priv *hpriv = ap->host->private_data; 2494 struct device *dev = ap->host->dev; 2495 struct ahci_port_priv *pp; 2496 void *mem; 2497 dma_addr_t mem_dma; 2498 size_t dma_sz, rx_fis_sz; 2499 2500 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 2501 if (!pp) 2502 return -ENOMEM; 2503 2504 if (ap->host->n_ports > 1) { 2505 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL); 2506 if (!pp->irq_desc) { 2507 devm_kfree(dev, pp); 2508 return -ENOMEM; 2509 } 2510 snprintf(pp->irq_desc, 8, 2511 "%s%d", dev_driver_string(dev), ap->port_no); 2512 } 2513 2514 /* check FBS capability */ 2515 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) { 2516 void __iomem *port_mmio = ahci_port_base(ap); 2517 u32 cmd = readl(port_mmio + PORT_CMD); 2518 if (cmd & PORT_CMD_FBSCP) 2519 pp->fbs_supported = true; 2520 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) { 2521 dev_info(dev, "port %d can do FBS, forcing FBSCP\n", 2522 ap->port_no); 2523 pp->fbs_supported = true; 2524 } else 2525 dev_warn(dev, "port %d is not capable of FBS\n", 2526 ap->port_no); 2527 } 2528 2529 if (pp->fbs_supported) { 2530 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ; 2531 rx_fis_sz = AHCI_RX_FIS_SZ * 16; 2532 } else { 2533 dma_sz = AHCI_PORT_PRIV_DMA_SZ; 2534 rx_fis_sz = AHCI_RX_FIS_SZ; 2535 } 2536 2537 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL); 2538 if (!mem) 2539 return -ENOMEM; 2540 2541 /* 2542 * First item in chunk of DMA memory: 32-slot command table, 2543 * 32 bytes each in size 2544 */ 2545 pp->cmd_slot = mem; 2546 pp->cmd_slot_dma = mem_dma; 2547 2548 mem += AHCI_CMD_SLOT_SZ; 2549 mem_dma += AHCI_CMD_SLOT_SZ; 2550 2551 /* 2552 * Second item: Received-FIS area 2553 */ 2554 pp->rx_fis = mem; 2555 pp->rx_fis_dma = mem_dma; 2556 2557 mem += rx_fis_sz; 2558 mem_dma += rx_fis_sz; 2559 2560 /* 2561 * Third item: data area for storing a single command 2562 * and its scatter-gather table 2563 */ 2564 pp->cmd_tbl = mem; 2565 pp->cmd_tbl_dma = mem_dma; 2566 2567 /* 2568 * Save off initial list of interrupts to be enabled. 2569 * This could be changed later 2570 */ 2571 pp->intr_mask = DEF_PORT_IRQ; 2572 2573 /* 2574 * Switch to per-port locking in case each port has its own MSI vector. 2575 */ 2576 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { 2577 spin_lock_init(&pp->lock); 2578 ap->lock = &pp->lock; 2579 } 2580 2581 ap->private_data = pp; 2582 2583 /* engage engines, captain */ 2584 return ahci_port_resume(ap); 2585 } 2586 2587 static void ahci_port_stop(struct ata_port *ap) 2588 { 2589 const char *emsg = NULL; 2590 struct ahci_host_priv *hpriv = ap->host->private_data; 2591 void __iomem *host_mmio = hpriv->mmio; 2592 int rc; 2593 2594 /* de-initialize port */ 2595 rc = ahci_deinit_port(ap, &emsg); 2596 if (rc) 2597 ata_port_warn(ap, "%s (%d)\n", emsg, rc); 2598 2599 /* 2600 * Clear GHC.IS to prevent stuck INTx after disabling MSI and 2601 * re-enabling INTx. 2602 */ 2603 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT); 2604 2605 ahci_rpm_put_port(ap); 2606 } 2607 2608 void ahci_print_info(struct ata_host *host, const char *scc_s) 2609 { 2610 struct ahci_host_priv *hpriv = host->private_data; 2611 u32 vers, cap, cap2, impl, speed; 2612 const char *speed_s; 2613 2614 vers = hpriv->version; 2615 cap = hpriv->cap; 2616 cap2 = hpriv->cap2; 2617 impl = hpriv->port_map; 2618 2619 speed = (cap >> 20) & 0xf; 2620 if (speed == 1) 2621 speed_s = "1.5"; 2622 else if (speed == 2) 2623 speed_s = "3"; 2624 else if (speed == 3) 2625 speed_s = "6"; 2626 else 2627 speed_s = "?"; 2628 2629 dev_info(host->dev, 2630 "AHCI %02x%02x.%02x%02x " 2631 "%u slots %u ports %s Gbps 0x%x impl %s mode\n" 2632 , 2633 2634 (vers >> 24) & 0xff, 2635 (vers >> 16) & 0xff, 2636 (vers >> 8) & 0xff, 2637 vers & 0xff, 2638 2639 ((cap >> 8) & 0x1f) + 1, 2640 (cap & 0x1f) + 1, 2641 speed_s, 2642 impl, 2643 scc_s); 2644 2645 dev_info(host->dev, 2646 "flags: " 2647 "%s%s%s%s%s%s%s" 2648 "%s%s%s%s%s%s%s" 2649 "%s%s%s%s%s%s%s" 2650 "%s%s\n" 2651 , 2652 2653 cap & HOST_CAP_64 ? "64bit " : "", 2654 cap & HOST_CAP_NCQ ? "ncq " : "", 2655 cap & HOST_CAP_SNTF ? "sntf " : "", 2656 cap & HOST_CAP_MPS ? "ilck " : "", 2657 cap & HOST_CAP_SSS ? "stag " : "", 2658 cap & HOST_CAP_ALPM ? "pm " : "", 2659 cap & HOST_CAP_LED ? "led " : "", 2660 cap & HOST_CAP_CLO ? "clo " : "", 2661 cap & HOST_CAP_ONLY ? "only " : "", 2662 cap & HOST_CAP_PMP ? "pmp " : "", 2663 cap & HOST_CAP_FBS ? "fbs " : "", 2664 cap & HOST_CAP_PIO_MULTI ? "pio " : "", 2665 cap & HOST_CAP_SSC ? "slum " : "", 2666 cap & HOST_CAP_PART ? "part " : "", 2667 cap & HOST_CAP_CCC ? "ccc " : "", 2668 cap & HOST_CAP_EMS ? "ems " : "", 2669 cap & HOST_CAP_SXS ? "sxs " : "", 2670 cap2 & HOST_CAP2_DESO ? "deso " : "", 2671 cap2 & HOST_CAP2_SADM ? "sadm " : "", 2672 cap2 & HOST_CAP2_SDS ? "sds " : "", 2673 cap2 & HOST_CAP2_APST ? "apst " : "", 2674 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "", 2675 cap2 & HOST_CAP2_BOH ? "boh " : "" 2676 ); 2677 } 2678 EXPORT_SYMBOL_GPL(ahci_print_info); 2679 2680 void ahci_set_em_messages(struct ahci_host_priv *hpriv, 2681 struct ata_port_info *pi) 2682 { 2683 u8 messages; 2684 void __iomem *mmio = hpriv->mmio; 2685 u32 em_loc = readl(mmio + HOST_EM_LOC); 2686 u32 em_ctl = readl(mmio + HOST_EM_CTL); 2687 2688 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS)) 2689 return; 2690 2691 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16; 2692 2693 if (messages) { 2694 /* store em_loc */ 2695 hpriv->em_loc = ((em_loc >> 16) * 4); 2696 hpriv->em_buf_sz = ((em_loc & 0xff) * 4); 2697 hpriv->em_msg_type = messages; 2698 pi->flags |= ATA_FLAG_EM; 2699 if (!(em_ctl & EM_CTL_ALHD)) 2700 pi->flags |= ATA_FLAG_SW_ACTIVITY; 2701 } 2702 } 2703 EXPORT_SYMBOL_GPL(ahci_set_em_messages); 2704 2705 static int ahci_host_activate_multi_irqs(struct ata_host *host, 2706 const struct scsi_host_template *sht) 2707 { 2708 struct ahci_host_priv *hpriv = host->private_data; 2709 int i, rc; 2710 2711 rc = ata_host_start(host); 2712 if (rc) 2713 return rc; 2714 /* 2715 * Requests IRQs according to AHCI-1.1 when multiple MSIs were 2716 * allocated. That is one MSI per port, starting from @irq. 2717 */ 2718 for (i = 0; i < host->n_ports; i++) { 2719 struct ahci_port_priv *pp = host->ports[i]->private_data; 2720 int irq = hpriv->get_irq_vector(host, i); 2721 2722 /* Do not receive interrupts sent by dummy ports */ 2723 if (!pp) { 2724 disable_irq(irq); 2725 continue; 2726 } 2727 2728 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard, 2729 0, pp->irq_desc, host->ports[i]); 2730 2731 if (rc) 2732 return rc; 2733 ata_port_desc(host->ports[i], "irq %d", irq); 2734 } 2735 2736 return ata_host_register(host, sht); 2737 } 2738 2739 /** 2740 * ahci_host_activate - start AHCI host, request IRQs and register it 2741 * @host: target ATA host 2742 * @sht: scsi_host_template to use when registering the host 2743 * 2744 * LOCKING: 2745 * Inherited from calling layer (may sleep). 2746 * 2747 * RETURNS: 2748 * 0 on success, -errno otherwise. 2749 */ 2750 int ahci_host_activate(struct ata_host *host, const struct scsi_host_template *sht) 2751 { 2752 struct ahci_host_priv *hpriv = host->private_data; 2753 int irq = hpriv->irq; 2754 int rc; 2755 2756 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { 2757 if (hpriv->irq_handler && 2758 hpriv->irq_handler != ahci_single_level_irq_intr) 2759 dev_warn(host->dev, 2760 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n"); 2761 if (!hpriv->get_irq_vector) { 2762 dev_err(host->dev, 2763 "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n"); 2764 return -EIO; 2765 } 2766 2767 rc = ahci_host_activate_multi_irqs(host, sht); 2768 } else { 2769 rc = ata_host_activate(host, irq, hpriv->irq_handler, 2770 IRQF_SHARED, sht); 2771 } 2772 2773 2774 return rc; 2775 } 2776 EXPORT_SYMBOL_GPL(ahci_host_activate); 2777 2778 MODULE_AUTHOR("Jeff Garzik"); 2779 MODULE_DESCRIPTION("Common AHCI SATA low-level routines"); 2780 MODULE_LICENSE("GPL"); 2781