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/kernel.h> 20 #include <linux/gfp.h> 21 #include <linux/module.h> 22 #include <linux/nospec.h> 23 #include <linux/blkdev.h> 24 #include <linux/delay.h> 25 #include <linux/interrupt.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/device.h> 28 #include <scsi/scsi_host.h> 29 #include <scsi/scsi_cmnd.h> 30 #include <linux/libata.h> 31 #include <linux/pci.h> 32 #include "ahci.h" 33 #include "libata.h" 34 35 static int ahci_skip_host_reset; 36 int ahci_ignore_sss; 37 EXPORT_SYMBOL_GPL(ahci_ignore_sss); 38 39 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444); 40 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)"); 41 42 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444); 43 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)"); 44 45 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, 46 unsigned hints); 47 static ssize_t ahci_led_show(struct ata_port *ap, char *buf); 48 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, 49 size_t size); 50 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, 51 ssize_t size); 52 53 54 55 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); 56 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); 57 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc); 58 static int ahci_port_start(struct ata_port *ap); 59 static void ahci_port_stop(struct ata_port *ap); 60 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc); 61 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc); 62 static void ahci_freeze(struct ata_port *ap); 63 static void ahci_thaw(struct ata_port *ap); 64 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep); 65 static void ahci_enable_fbs(struct ata_port *ap); 66 static void ahci_disable_fbs(struct ata_port *ap); 67 static void ahci_pmp_attach(struct ata_port *ap); 68 static void ahci_pmp_detach(struct ata_port *ap); 69 static int ahci_softreset(struct ata_link *link, unsigned int *class, 70 unsigned long deadline); 71 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, 72 unsigned long deadline); 73 static int ahci_hardreset(struct ata_link *link, unsigned int *class, 74 unsigned long deadline); 75 static void ahci_postreset(struct ata_link *link, unsigned int *class); 76 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc); 77 static void ahci_dev_config(struct ata_device *dev); 78 #ifdef CONFIG_PM 79 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg); 80 #endif 81 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf); 82 static ssize_t ahci_activity_store(struct ata_device *dev, 83 enum sw_activity val); 84 static void ahci_init_sw_activity(struct ata_link *link); 85 86 static ssize_t ahci_show_host_caps(struct device *dev, 87 struct device_attribute *attr, char *buf); 88 static ssize_t ahci_show_host_cap2(struct device *dev, 89 struct device_attribute *attr, char *buf); 90 static ssize_t ahci_show_host_version(struct device *dev, 91 struct device_attribute *attr, char *buf); 92 static ssize_t ahci_show_port_cmd(struct device *dev, 93 struct device_attribute *attr, char *buf); 94 static ssize_t ahci_read_em_buffer(struct device *dev, 95 struct device_attribute *attr, char *buf); 96 static ssize_t ahci_store_em_buffer(struct device *dev, 97 struct device_attribute *attr, 98 const char *buf, size_t size); 99 static ssize_t ahci_show_em_supported(struct device *dev, 100 struct device_attribute *attr, char *buf); 101 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance); 102 103 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); 104 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL); 105 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL); 106 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL); 107 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, 108 ahci_read_em_buffer, ahci_store_em_buffer); 109 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL); 110 111 static struct attribute *ahci_shost_attrs[] = { 112 &dev_attr_link_power_management_policy.attr, 113 &dev_attr_em_message_type.attr, 114 &dev_attr_em_message.attr, 115 &dev_attr_ahci_host_caps.attr, 116 &dev_attr_ahci_host_cap2.attr, 117 &dev_attr_ahci_host_version.attr, 118 &dev_attr_ahci_port_cmd.attr, 119 &dev_attr_em_buffer.attr, 120 &dev_attr_em_message_supported.attr, 121 NULL 122 }; 123 124 static const struct attribute_group ahci_shost_attr_group = { 125 .attrs = ahci_shost_attrs 126 }; 127 128 const struct attribute_group *ahci_shost_groups[] = { 129 &ahci_shost_attr_group, 130 NULL 131 }; 132 EXPORT_SYMBOL_GPL(ahci_shost_groups); 133 134 static struct attribute *ahci_sdev_attrs[] = { 135 &dev_attr_sw_activity.attr, 136 &dev_attr_unload_heads.attr, 137 &dev_attr_ncq_prio_supported.attr, 138 &dev_attr_ncq_prio_enable.attr, 139 NULL 140 }; 141 142 static const struct attribute_group ahci_sdev_attr_group = { 143 .attrs = ahci_sdev_attrs 144 }; 145 146 const struct attribute_group *ahci_sdev_groups[] = { 147 &ahci_sdev_attr_group, 148 NULL 149 }; 150 EXPORT_SYMBOL_GPL(ahci_sdev_groups); 151 152 struct ata_port_operations ahci_ops = { 153 .inherits = &sata_pmp_port_ops, 154 155 .qc_defer = ahci_pmp_qc_defer, 156 .qc_prep = ahci_qc_prep, 157 .qc_issue = ahci_qc_issue, 158 .qc_fill_rtf = ahci_qc_fill_rtf, 159 160 .freeze = ahci_freeze, 161 .thaw = ahci_thaw, 162 .softreset = ahci_softreset, 163 .hardreset = ahci_hardreset, 164 .postreset = ahci_postreset, 165 .pmp_softreset = ahci_softreset, 166 .error_handler = ahci_error_handler, 167 .post_internal_cmd = ahci_post_internal_cmd, 168 .dev_config = ahci_dev_config, 169 170 .scr_read = ahci_scr_read, 171 .scr_write = ahci_scr_write, 172 .pmp_attach = ahci_pmp_attach, 173 .pmp_detach = ahci_pmp_detach, 174 175 .set_lpm = ahci_set_lpm, 176 .em_show = ahci_led_show, 177 .em_store = ahci_led_store, 178 .sw_activity_show = ahci_activity_show, 179 .sw_activity_store = ahci_activity_store, 180 .transmit_led_message = ahci_transmit_led_message, 181 #ifdef CONFIG_PM 182 .port_suspend = ahci_port_suspend, 183 .port_resume = ahci_port_resume, 184 #endif 185 .port_start = ahci_port_start, 186 .port_stop = ahci_port_stop, 187 }; 188 EXPORT_SYMBOL_GPL(ahci_ops); 189 190 struct ata_port_operations ahci_pmp_retry_srst_ops = { 191 .inherits = &ahci_ops, 192 .softreset = ahci_pmp_retry_softreset, 193 }; 194 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops); 195 196 static bool ahci_em_messages __read_mostly = true; 197 module_param(ahci_em_messages, bool, 0444); 198 /* add other LED protocol types when they become supported */ 199 MODULE_PARM_DESC(ahci_em_messages, 200 "AHCI Enclosure Management Message control (0 = off, 1 = on)"); 201 202 /* device sleep idle timeout in ms */ 203 static int devslp_idle_timeout __read_mostly = 1000; 204 module_param(devslp_idle_timeout, int, 0644); 205 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout"); 206 207 static void ahci_enable_ahci(void __iomem *mmio) 208 { 209 int i; 210 u32 tmp; 211 212 /* turn on AHCI_EN */ 213 tmp = readl(mmio + HOST_CTL); 214 if (tmp & HOST_AHCI_EN) 215 return; 216 217 /* Some controllers need AHCI_EN to be written multiple times. 218 * Try a few times before giving up. 219 */ 220 for (i = 0; i < 5; i++) { 221 tmp |= HOST_AHCI_EN; 222 writel(tmp, mmio + HOST_CTL); 223 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */ 224 if (tmp & HOST_AHCI_EN) 225 return; 226 msleep(10); 227 } 228 229 WARN_ON(1); 230 } 231 232 /** 233 * ahci_rpm_get_port - Make sure the port is powered on 234 * @ap: Port to power on 235 * 236 * Whenever there is need to access the AHCI host registers outside of 237 * normal execution paths, call this function to make sure the host is 238 * actually powered on. 239 */ 240 static int ahci_rpm_get_port(struct ata_port *ap) 241 { 242 return pm_runtime_get_sync(ap->dev); 243 } 244 245 /** 246 * ahci_rpm_put_port - Undoes ahci_rpm_get_port() 247 * @ap: Port to power down 248 * 249 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host 250 * if it has no more active users. 251 */ 252 static void ahci_rpm_put_port(struct ata_port *ap) 253 { 254 pm_runtime_put(ap->dev); 255 } 256 257 static ssize_t ahci_show_host_caps(struct device *dev, 258 struct device_attribute *attr, char *buf) 259 { 260 struct Scsi_Host *shost = class_to_shost(dev); 261 struct ata_port *ap = ata_shost_to_port(shost); 262 struct ahci_host_priv *hpriv = ap->host->private_data; 263 264 return sprintf(buf, "%x\n", hpriv->cap); 265 } 266 267 static ssize_t ahci_show_host_cap2(struct device *dev, 268 struct device_attribute *attr, char *buf) 269 { 270 struct Scsi_Host *shost = class_to_shost(dev); 271 struct ata_port *ap = ata_shost_to_port(shost); 272 struct ahci_host_priv *hpriv = ap->host->private_data; 273 274 return sprintf(buf, "%x\n", hpriv->cap2); 275 } 276 277 static ssize_t ahci_show_host_version(struct device *dev, 278 struct device_attribute *attr, char *buf) 279 { 280 struct Scsi_Host *shost = class_to_shost(dev); 281 struct ata_port *ap = ata_shost_to_port(shost); 282 struct ahci_host_priv *hpriv = ap->host->private_data; 283 284 return sprintf(buf, "%x\n", hpriv->version); 285 } 286 287 static ssize_t ahci_show_port_cmd(struct device *dev, 288 struct device_attribute *attr, char *buf) 289 { 290 struct Scsi_Host *shost = class_to_shost(dev); 291 struct ata_port *ap = ata_shost_to_port(shost); 292 void __iomem *port_mmio = ahci_port_base(ap); 293 ssize_t ret; 294 295 ahci_rpm_get_port(ap); 296 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD)); 297 ahci_rpm_put_port(ap); 298 299 return ret; 300 } 301 302 static ssize_t ahci_read_em_buffer(struct device *dev, 303 struct device_attribute *attr, char *buf) 304 { 305 struct Scsi_Host *shost = class_to_shost(dev); 306 struct ata_port *ap = ata_shost_to_port(shost); 307 struct ahci_host_priv *hpriv = ap->host->private_data; 308 void __iomem *mmio = hpriv->mmio; 309 void __iomem *em_mmio = mmio + hpriv->em_loc; 310 u32 em_ctl, msg; 311 unsigned long flags; 312 size_t count; 313 int i; 314 315 ahci_rpm_get_port(ap); 316 spin_lock_irqsave(ap->lock, flags); 317 318 em_ctl = readl(mmio + HOST_EM_CTL); 319 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT || 320 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) { 321 spin_unlock_irqrestore(ap->lock, flags); 322 ahci_rpm_put_port(ap); 323 return -EINVAL; 324 } 325 326 if (!(em_ctl & EM_CTL_MR)) { 327 spin_unlock_irqrestore(ap->lock, flags); 328 ahci_rpm_put_port(ap); 329 return -EAGAIN; 330 } 331 332 if (!(em_ctl & EM_CTL_SMB)) 333 em_mmio += hpriv->em_buf_sz; 334 335 count = hpriv->em_buf_sz; 336 337 /* the count should not be larger than PAGE_SIZE */ 338 if (count > PAGE_SIZE) { 339 if (printk_ratelimit()) 340 ata_port_warn(ap, 341 "EM read buffer size too large: " 342 "buffer size %u, page size %lu\n", 343 hpriv->em_buf_sz, PAGE_SIZE); 344 count = PAGE_SIZE; 345 } 346 347 for (i = 0; i < count; i += 4) { 348 msg = readl(em_mmio + i); 349 buf[i] = msg & 0xff; 350 buf[i + 1] = (msg >> 8) & 0xff; 351 buf[i + 2] = (msg >> 16) & 0xff; 352 buf[i + 3] = (msg >> 24) & 0xff; 353 } 354 355 spin_unlock_irqrestore(ap->lock, flags); 356 ahci_rpm_put_port(ap); 357 358 return i; 359 } 360 361 static ssize_t ahci_store_em_buffer(struct device *dev, 362 struct device_attribute *attr, 363 const char *buf, size_t size) 364 { 365 struct Scsi_Host *shost = class_to_shost(dev); 366 struct ata_port *ap = ata_shost_to_port(shost); 367 struct ahci_host_priv *hpriv = ap->host->private_data; 368 void __iomem *mmio = hpriv->mmio; 369 void __iomem *em_mmio = mmio + hpriv->em_loc; 370 const unsigned char *msg_buf = buf; 371 u32 em_ctl, msg; 372 unsigned long flags; 373 int i; 374 375 /* check size validity */ 376 if (!(ap->flags & ATA_FLAG_EM) || 377 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) || 378 size % 4 || size > hpriv->em_buf_sz) 379 return -EINVAL; 380 381 ahci_rpm_get_port(ap); 382 spin_lock_irqsave(ap->lock, flags); 383 384 em_ctl = readl(mmio + HOST_EM_CTL); 385 if (em_ctl & EM_CTL_TM) { 386 spin_unlock_irqrestore(ap->lock, flags); 387 ahci_rpm_put_port(ap); 388 return -EBUSY; 389 } 390 391 for (i = 0; i < size; i += 4) { 392 msg = msg_buf[i] | msg_buf[i + 1] << 8 | 393 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24; 394 writel(msg, em_mmio + i); 395 } 396 397 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); 398 399 spin_unlock_irqrestore(ap->lock, flags); 400 ahci_rpm_put_port(ap); 401 402 return size; 403 } 404 405 static ssize_t ahci_show_em_supported(struct device *dev, 406 struct device_attribute *attr, char *buf) 407 { 408 struct Scsi_Host *shost = class_to_shost(dev); 409 struct ata_port *ap = ata_shost_to_port(shost); 410 struct ahci_host_priv *hpriv = ap->host->private_data; 411 void __iomem *mmio = hpriv->mmio; 412 u32 em_ctl; 413 414 ahci_rpm_get_port(ap); 415 em_ctl = readl(mmio + HOST_EM_CTL); 416 ahci_rpm_put_port(ap); 417 418 return sprintf(buf, "%s%s%s%s\n", 419 em_ctl & EM_CTL_LED ? "led " : "", 420 em_ctl & EM_CTL_SAFTE ? "saf-te " : "", 421 em_ctl & EM_CTL_SES ? "ses-2 " : "", 422 em_ctl & EM_CTL_SGPIO ? "sgpio " : ""); 423 } 424 425 /** 426 * ahci_save_initial_config - Save and fixup initial config values 427 * @dev: target AHCI device 428 * @hpriv: host private area to store config values 429 * 430 * Some registers containing configuration info might be setup by 431 * BIOS and might be cleared on reset. This function saves the 432 * initial values of those registers into @hpriv such that they 433 * can be restored after controller reset. 434 * 435 * If inconsistent, config values are fixed up by this function. 436 * 437 * If it is not set already this function sets hpriv->start_engine to 438 * ahci_start_engine. 439 * 440 * LOCKING: 441 * None. 442 */ 443 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv) 444 { 445 void __iomem *mmio = hpriv->mmio; 446 u32 cap, cap2, vers, port_map; 447 int i; 448 449 /* make sure AHCI mode is enabled before accessing CAP */ 450 ahci_enable_ahci(mmio); 451 452 /* Values prefixed with saved_ are written back to host after 453 * reset. Values without are used for driver operation. 454 */ 455 hpriv->saved_cap = cap = readl(mmio + HOST_CAP); 456 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL); 457 458 /* CAP2 register is only defined for AHCI 1.2 and later */ 459 vers = readl(mmio + HOST_VERSION); 460 if ((vers >> 16) > 1 || 461 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200)) 462 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2); 463 else 464 hpriv->saved_cap2 = cap2 = 0; 465 466 /* some chips have errata preventing 64bit use */ 467 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) { 468 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n"); 469 cap &= ~HOST_CAP_64; 470 } 471 472 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) { 473 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n"); 474 cap &= ~HOST_CAP_NCQ; 475 } 476 477 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) { 478 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n"); 479 cap |= HOST_CAP_NCQ; 480 } 481 482 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) { 483 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n"); 484 cap &= ~HOST_CAP_PMP; 485 } 486 487 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) { 488 dev_info(dev, 489 "controller can't do SNTF, turning off CAP_SNTF\n"); 490 cap &= ~HOST_CAP_SNTF; 491 } 492 493 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) { 494 dev_info(dev, 495 "controller can't do DEVSLP, turning off\n"); 496 cap2 &= ~HOST_CAP2_SDS; 497 cap2 &= ~HOST_CAP2_SADM; 498 } 499 500 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) { 501 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n"); 502 cap |= HOST_CAP_FBS; 503 } 504 505 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) { 506 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n"); 507 cap &= ~HOST_CAP_FBS; 508 } 509 510 if (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) { 511 dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n"); 512 cap |= HOST_CAP_ALPM; 513 } 514 515 if ((cap & HOST_CAP_SXS) && (hpriv->flags & AHCI_HFLAG_NO_SXS)) { 516 dev_info(dev, "controller does not support SXS, disabling CAP_SXS\n"); 517 cap &= ~HOST_CAP_SXS; 518 } 519 520 if (hpriv->force_port_map && port_map != hpriv->force_port_map) { 521 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n", 522 port_map, hpriv->force_port_map); 523 port_map = hpriv->force_port_map; 524 hpriv->saved_port_map = port_map; 525 } 526 527 if (hpriv->mask_port_map) { 528 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n", 529 port_map, 530 port_map & hpriv->mask_port_map); 531 port_map &= hpriv->mask_port_map; 532 } 533 534 /* cross check port_map and cap.n_ports */ 535 if (port_map) { 536 int map_ports = 0; 537 538 for (i = 0; i < AHCI_MAX_PORTS; i++) 539 if (port_map & (1 << i)) 540 map_ports++; 541 542 /* If PI has more ports than n_ports, whine, clear 543 * port_map and let it be generated from n_ports. 544 */ 545 if (map_ports > ahci_nr_ports(cap)) { 546 dev_warn(dev, 547 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n", 548 port_map, ahci_nr_ports(cap)); 549 port_map = 0; 550 } 551 } 552 553 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */ 554 if (!port_map && vers < 0x10300) { 555 port_map = (1 << ahci_nr_ports(cap)) - 1; 556 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map); 557 558 /* write the fixed up value to the PI register */ 559 hpriv->saved_port_map = port_map; 560 } 561 562 /* record values to use during operation */ 563 hpriv->cap = cap; 564 hpriv->cap2 = cap2; 565 hpriv->version = readl(mmio + HOST_VERSION); 566 hpriv->port_map = port_map; 567 568 if (!hpriv->start_engine) 569 hpriv->start_engine = ahci_start_engine; 570 571 if (!hpriv->stop_engine) 572 hpriv->stop_engine = ahci_stop_engine; 573 574 if (!hpriv->irq_handler) 575 hpriv->irq_handler = ahci_single_level_irq_intr; 576 } 577 EXPORT_SYMBOL_GPL(ahci_save_initial_config); 578 579 /** 580 * ahci_restore_initial_config - Restore initial config 581 * @host: target ATA host 582 * 583 * Restore initial config stored by ahci_save_initial_config(). 584 * 585 * LOCKING: 586 * None. 587 */ 588 static void ahci_restore_initial_config(struct ata_host *host) 589 { 590 struct ahci_host_priv *hpriv = host->private_data; 591 void __iomem *mmio = hpriv->mmio; 592 593 writel(hpriv->saved_cap, mmio + HOST_CAP); 594 if (hpriv->saved_cap2) 595 writel(hpriv->saved_cap2, mmio + HOST_CAP2); 596 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL); 597 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ 598 } 599 600 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg) 601 { 602 static const int offset[] = { 603 [SCR_STATUS] = PORT_SCR_STAT, 604 [SCR_CONTROL] = PORT_SCR_CTL, 605 [SCR_ERROR] = PORT_SCR_ERR, 606 [SCR_ACTIVE] = PORT_SCR_ACT, 607 [SCR_NOTIFICATION] = PORT_SCR_NTF, 608 }; 609 struct ahci_host_priv *hpriv = ap->host->private_data; 610 611 if (sc_reg < ARRAY_SIZE(offset) && 612 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF))) 613 return offset[sc_reg]; 614 return 0; 615 } 616 617 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) 618 { 619 void __iomem *port_mmio = ahci_port_base(link->ap); 620 int offset = ahci_scr_offset(link->ap, sc_reg); 621 622 if (offset) { 623 *val = readl(port_mmio + offset); 624 return 0; 625 } 626 return -EINVAL; 627 } 628 629 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) 630 { 631 void __iomem *port_mmio = ahci_port_base(link->ap); 632 int offset = ahci_scr_offset(link->ap, sc_reg); 633 634 if (offset) { 635 writel(val, port_mmio + offset); 636 return 0; 637 } 638 return -EINVAL; 639 } 640 641 void ahci_start_engine(struct ata_port *ap) 642 { 643 void __iomem *port_mmio = ahci_port_base(ap); 644 u32 tmp; 645 646 /* start DMA */ 647 tmp = readl(port_mmio + PORT_CMD); 648 tmp |= PORT_CMD_START; 649 writel(tmp, port_mmio + PORT_CMD); 650 readl(port_mmio + PORT_CMD); /* flush */ 651 } 652 EXPORT_SYMBOL_GPL(ahci_start_engine); 653 654 int ahci_stop_engine(struct ata_port *ap) 655 { 656 void __iomem *port_mmio = ahci_port_base(ap); 657 struct ahci_host_priv *hpriv = ap->host->private_data; 658 u32 tmp; 659 660 /* 661 * On some controllers, stopping a port's DMA engine while the port 662 * is in ALPM state (partial or slumber) results in failures on 663 * subsequent DMA engine starts. For those controllers, put the 664 * port back in active state before stopping its DMA engine. 665 */ 666 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) && 667 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) && 668 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) { 669 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n"); 670 return -EIO; 671 } 672 673 tmp = readl(port_mmio + PORT_CMD); 674 675 /* check if the HBA is idle */ 676 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0) 677 return 0; 678 679 /* 680 * Don't try to issue commands but return with ENODEV if the 681 * AHCI controller not available anymore (e.g. due to PCIe hot 682 * unplugging). Otherwise a 500ms delay for each port is added. 683 */ 684 if (tmp == 0xffffffff) { 685 dev_err(ap->host->dev, "AHCI controller unavailable!\n"); 686 return -ENODEV; 687 } 688 689 /* setting HBA to idle */ 690 tmp &= ~PORT_CMD_START; 691 writel(tmp, port_mmio + PORT_CMD); 692 693 /* wait for engine to stop. This could be as long as 500 msec */ 694 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, 695 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500); 696 if (tmp & PORT_CMD_LIST_ON) 697 return -EIO; 698 699 return 0; 700 } 701 EXPORT_SYMBOL_GPL(ahci_stop_engine); 702 703 void ahci_start_fis_rx(struct ata_port *ap) 704 { 705 void __iomem *port_mmio = ahci_port_base(ap); 706 struct ahci_host_priv *hpriv = ap->host->private_data; 707 struct ahci_port_priv *pp = ap->private_data; 708 u32 tmp; 709 710 /* set FIS registers */ 711 if (hpriv->cap & HOST_CAP_64) 712 writel((pp->cmd_slot_dma >> 16) >> 16, 713 port_mmio + PORT_LST_ADDR_HI); 714 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); 715 716 if (hpriv->cap & HOST_CAP_64) 717 writel((pp->rx_fis_dma >> 16) >> 16, 718 port_mmio + PORT_FIS_ADDR_HI); 719 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); 720 721 /* enable FIS reception */ 722 tmp = readl(port_mmio + PORT_CMD); 723 tmp |= PORT_CMD_FIS_RX; 724 writel(tmp, port_mmio + PORT_CMD); 725 726 /* flush */ 727 readl(port_mmio + PORT_CMD); 728 } 729 EXPORT_SYMBOL_GPL(ahci_start_fis_rx); 730 731 static int ahci_stop_fis_rx(struct ata_port *ap) 732 { 733 void __iomem *port_mmio = ahci_port_base(ap); 734 u32 tmp; 735 736 /* disable FIS reception */ 737 tmp = readl(port_mmio + PORT_CMD); 738 tmp &= ~PORT_CMD_FIS_RX; 739 writel(tmp, port_mmio + PORT_CMD); 740 741 /* wait for completion, spec says 500ms, give it 1000 */ 742 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON, 743 PORT_CMD_FIS_ON, 10, 1000); 744 if (tmp & PORT_CMD_FIS_ON) 745 return -EBUSY; 746 747 return 0; 748 } 749 750 static void ahci_power_up(struct ata_port *ap) 751 { 752 struct ahci_host_priv *hpriv = ap->host->private_data; 753 void __iomem *port_mmio = ahci_port_base(ap); 754 u32 cmd; 755 756 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; 757 758 /* spin up device */ 759 if (hpriv->cap & HOST_CAP_SSS) { 760 cmd |= PORT_CMD_SPIN_UP; 761 writel(cmd, port_mmio + PORT_CMD); 762 } 763 764 /* wake up link */ 765 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD); 766 } 767 768 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, 769 unsigned int hints) 770 { 771 struct ata_port *ap = link->ap; 772 struct ahci_host_priv *hpriv = ap->host->private_data; 773 struct ahci_port_priv *pp = ap->private_data; 774 void __iomem *port_mmio = ahci_port_base(ap); 775 776 if (policy != ATA_LPM_MAX_POWER) { 777 /* wakeup flag only applies to the max power policy */ 778 hints &= ~ATA_LPM_WAKE_ONLY; 779 780 /* 781 * Disable interrupts on Phy Ready. This keeps us from 782 * getting woken up due to spurious phy ready 783 * interrupts. 784 */ 785 pp->intr_mask &= ~PORT_IRQ_PHYRDY; 786 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 787 788 sata_link_scr_lpm(link, policy, false); 789 } 790 791 if (hpriv->cap & HOST_CAP_ALPM) { 792 u32 cmd = readl(port_mmio + PORT_CMD); 793 794 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) { 795 if (!(hints & ATA_LPM_WAKE_ONLY)) 796 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE); 797 cmd |= PORT_CMD_ICC_ACTIVE; 798 799 writel(cmd, port_mmio + PORT_CMD); 800 readl(port_mmio + PORT_CMD); 801 802 /* wait 10ms to be sure we've come out of LPM state */ 803 ata_msleep(ap, 10); 804 805 if (hints & ATA_LPM_WAKE_ONLY) 806 return 0; 807 } else { 808 cmd |= PORT_CMD_ALPE; 809 if (policy == ATA_LPM_MIN_POWER) 810 cmd |= PORT_CMD_ASP; 811 else if (policy == ATA_LPM_MIN_POWER_WITH_PARTIAL) 812 cmd &= ~PORT_CMD_ASP; 813 814 /* write out new cmd value */ 815 writel(cmd, port_mmio + PORT_CMD); 816 } 817 } 818 819 /* set aggressive device sleep */ 820 if ((hpriv->cap2 & HOST_CAP2_SDS) && 821 (hpriv->cap2 & HOST_CAP2_SADM) && 822 (link->device->flags & ATA_DFLAG_DEVSLP)) { 823 if (policy == ATA_LPM_MIN_POWER || 824 policy == ATA_LPM_MIN_POWER_WITH_PARTIAL) 825 ahci_set_aggressive_devslp(ap, true); 826 else 827 ahci_set_aggressive_devslp(ap, false); 828 } 829 830 if (policy == ATA_LPM_MAX_POWER) { 831 sata_link_scr_lpm(link, policy, false); 832 833 /* turn PHYRDY IRQ back on */ 834 pp->intr_mask |= PORT_IRQ_PHYRDY; 835 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 836 } 837 838 return 0; 839 } 840 841 #ifdef CONFIG_PM 842 static void ahci_power_down(struct ata_port *ap) 843 { 844 struct ahci_host_priv *hpriv = ap->host->private_data; 845 void __iomem *port_mmio = ahci_port_base(ap); 846 u32 cmd, scontrol; 847 848 if (!(hpriv->cap & HOST_CAP_SSS)) 849 return; 850 851 /* put device into listen mode, first set PxSCTL.DET to 0 */ 852 scontrol = readl(port_mmio + PORT_SCR_CTL); 853 scontrol &= ~0xf; 854 writel(scontrol, port_mmio + PORT_SCR_CTL); 855 856 /* then set PxCMD.SUD to 0 */ 857 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; 858 cmd &= ~PORT_CMD_SPIN_UP; 859 writel(cmd, port_mmio + PORT_CMD); 860 } 861 #endif 862 863 static void ahci_start_port(struct ata_port *ap) 864 { 865 struct ahci_host_priv *hpriv = ap->host->private_data; 866 struct ahci_port_priv *pp = ap->private_data; 867 struct ata_link *link; 868 struct ahci_em_priv *emp; 869 ssize_t rc; 870 int i; 871 872 /* enable FIS reception */ 873 ahci_start_fis_rx(ap); 874 875 /* enable DMA */ 876 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE)) 877 hpriv->start_engine(ap); 878 879 /* turn on LEDs */ 880 if (ap->flags & ATA_FLAG_EM) { 881 ata_for_each_link(link, ap, EDGE) { 882 emp = &pp->em_priv[link->pmp]; 883 884 /* EM Transmit bit maybe busy during init */ 885 for (i = 0; i < EM_MAX_RETRY; i++) { 886 rc = ap->ops->transmit_led_message(ap, 887 emp->led_state, 888 4); 889 /* 890 * If busy, give a breather but do not 891 * release EH ownership by using msleep() 892 * instead of ata_msleep(). EM Transmit 893 * bit is busy for the whole host and 894 * releasing ownership will cause other 895 * ports to fail the same way. 896 */ 897 if (rc == -EBUSY) 898 msleep(1); 899 else 900 break; 901 } 902 } 903 } 904 905 if (ap->flags & ATA_FLAG_SW_ACTIVITY) 906 ata_for_each_link(link, ap, EDGE) 907 ahci_init_sw_activity(link); 908 909 } 910 911 static int ahci_deinit_port(struct ata_port *ap, const char **emsg) 912 { 913 int rc; 914 struct ahci_host_priv *hpriv = ap->host->private_data; 915 916 /* disable DMA */ 917 rc = hpriv->stop_engine(ap); 918 if (rc) { 919 *emsg = "failed to stop engine"; 920 return rc; 921 } 922 923 /* disable FIS reception */ 924 rc = ahci_stop_fis_rx(ap); 925 if (rc) { 926 *emsg = "failed stop FIS RX"; 927 return rc; 928 } 929 930 return 0; 931 } 932 933 int ahci_reset_controller(struct ata_host *host) 934 { 935 struct ahci_host_priv *hpriv = host->private_data; 936 void __iomem *mmio = hpriv->mmio; 937 u32 tmp; 938 939 /* we must be in AHCI mode, before using anything 940 * AHCI-specific, such as HOST_RESET. 941 */ 942 ahci_enable_ahci(mmio); 943 944 /* global controller reset */ 945 if (!ahci_skip_host_reset) { 946 tmp = readl(mmio + HOST_CTL); 947 if ((tmp & HOST_RESET) == 0) { 948 writel(tmp | HOST_RESET, mmio + HOST_CTL); 949 readl(mmio + HOST_CTL); /* flush */ 950 } 951 952 /* 953 * to perform host reset, OS should set HOST_RESET 954 * and poll until this bit is read to be "0". 955 * reset must complete within 1 second, or 956 * the hardware should be considered fried. 957 */ 958 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET, 959 HOST_RESET, 10, 1000); 960 961 if (tmp & HOST_RESET) { 962 dev_err(host->dev, "controller reset failed (0x%x)\n", 963 tmp); 964 return -EIO; 965 } 966 967 /* turn on AHCI mode */ 968 ahci_enable_ahci(mmio); 969 970 /* Some registers might be cleared on reset. Restore 971 * initial values. 972 */ 973 if (!(hpriv->flags & AHCI_HFLAG_NO_WRITE_TO_RO)) 974 ahci_restore_initial_config(host); 975 } else 976 dev_info(host->dev, "skipping global host reset\n"); 977 978 return 0; 979 } 980 EXPORT_SYMBOL_GPL(ahci_reset_controller); 981 982 static void ahci_sw_activity(struct ata_link *link) 983 { 984 struct ata_port *ap = link->ap; 985 struct ahci_port_priv *pp = ap->private_data; 986 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 987 988 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY)) 989 return; 990 991 emp->activity++; 992 if (!timer_pending(&emp->timer)) 993 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10)); 994 } 995 996 static void ahci_sw_activity_blink(struct timer_list *t) 997 { 998 struct ahci_em_priv *emp = from_timer(emp, t, timer); 999 struct ata_link *link = emp->link; 1000 struct ata_port *ap = link->ap; 1001 1002 unsigned long led_message = emp->led_state; 1003 u32 activity_led_state; 1004 unsigned long flags; 1005 1006 led_message &= EM_MSG_LED_VALUE; 1007 led_message |= ap->port_no | (link->pmp << 8); 1008 1009 /* check to see if we've had activity. If so, 1010 * toggle state of LED and reset timer. If not, 1011 * turn LED to desired idle state. 1012 */ 1013 spin_lock_irqsave(ap->lock, flags); 1014 if (emp->saved_activity != emp->activity) { 1015 emp->saved_activity = emp->activity; 1016 /* get the current LED state */ 1017 activity_led_state = led_message & EM_MSG_LED_VALUE_ON; 1018 1019 if (activity_led_state) 1020 activity_led_state = 0; 1021 else 1022 activity_led_state = 1; 1023 1024 /* clear old state */ 1025 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; 1026 1027 /* toggle state */ 1028 led_message |= (activity_led_state << 16); 1029 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100)); 1030 } else { 1031 /* switch to idle */ 1032 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; 1033 if (emp->blink_policy == BLINK_OFF) 1034 led_message |= (1 << 16); 1035 } 1036 spin_unlock_irqrestore(ap->lock, flags); 1037 ap->ops->transmit_led_message(ap, led_message, 4); 1038 } 1039 1040 static void ahci_init_sw_activity(struct ata_link *link) 1041 { 1042 struct ata_port *ap = link->ap; 1043 struct ahci_port_priv *pp = ap->private_data; 1044 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1045 1046 /* init activity stats, setup timer */ 1047 emp->saved_activity = emp->activity = 0; 1048 emp->link = link; 1049 timer_setup(&emp->timer, ahci_sw_activity_blink, 0); 1050 1051 /* check our blink policy and set flag for link if it's enabled */ 1052 if (emp->blink_policy) 1053 link->flags |= ATA_LFLAG_SW_ACTIVITY; 1054 } 1055 1056 int ahci_reset_em(struct ata_host *host) 1057 { 1058 struct ahci_host_priv *hpriv = host->private_data; 1059 void __iomem *mmio = hpriv->mmio; 1060 u32 em_ctl; 1061 1062 em_ctl = readl(mmio + HOST_EM_CTL); 1063 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST)) 1064 return -EINVAL; 1065 1066 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL); 1067 return 0; 1068 } 1069 EXPORT_SYMBOL_GPL(ahci_reset_em); 1070 1071 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, 1072 ssize_t size) 1073 { 1074 struct ahci_host_priv *hpriv = ap->host->private_data; 1075 struct ahci_port_priv *pp = ap->private_data; 1076 void __iomem *mmio = hpriv->mmio; 1077 u32 em_ctl; 1078 u32 message[] = {0, 0}; 1079 unsigned long flags; 1080 int pmp; 1081 struct ahci_em_priv *emp; 1082 1083 /* get the slot number from the message */ 1084 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; 1085 if (pmp < EM_MAX_SLOTS) 1086 emp = &pp->em_priv[pmp]; 1087 else 1088 return -EINVAL; 1089 1090 ahci_rpm_get_port(ap); 1091 spin_lock_irqsave(ap->lock, flags); 1092 1093 /* 1094 * if we are still busy transmitting a previous message, 1095 * do not allow 1096 */ 1097 em_ctl = readl(mmio + HOST_EM_CTL); 1098 if (em_ctl & EM_CTL_TM) { 1099 spin_unlock_irqrestore(ap->lock, flags); 1100 ahci_rpm_put_port(ap); 1101 return -EBUSY; 1102 } 1103 1104 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) { 1105 /* 1106 * create message header - this is all zero except for 1107 * the message size, which is 4 bytes. 1108 */ 1109 message[0] |= (4 << 8); 1110 1111 /* ignore 0:4 of byte zero, fill in port info yourself */ 1112 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no); 1113 1114 /* write message to EM_LOC */ 1115 writel(message[0], mmio + hpriv->em_loc); 1116 writel(message[1], mmio + hpriv->em_loc+4); 1117 1118 /* 1119 * tell hardware to transmit the message 1120 */ 1121 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); 1122 } 1123 1124 /* save off new led state for port/slot */ 1125 emp->led_state = state; 1126 1127 spin_unlock_irqrestore(ap->lock, flags); 1128 ahci_rpm_put_port(ap); 1129 1130 return size; 1131 } 1132 1133 static ssize_t ahci_led_show(struct ata_port *ap, char *buf) 1134 { 1135 struct ahci_port_priv *pp = ap->private_data; 1136 struct ata_link *link; 1137 struct ahci_em_priv *emp; 1138 int rc = 0; 1139 1140 ata_for_each_link(link, ap, EDGE) { 1141 emp = &pp->em_priv[link->pmp]; 1142 rc += sprintf(buf, "%lx\n", emp->led_state); 1143 } 1144 return rc; 1145 } 1146 1147 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, 1148 size_t size) 1149 { 1150 unsigned int state; 1151 int pmp; 1152 struct ahci_port_priv *pp = ap->private_data; 1153 struct ahci_em_priv *emp; 1154 1155 if (kstrtouint(buf, 0, &state) < 0) 1156 return -EINVAL; 1157 1158 /* get the slot number from the message */ 1159 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; 1160 if (pmp < EM_MAX_SLOTS) { 1161 pmp = array_index_nospec(pmp, EM_MAX_SLOTS); 1162 emp = &pp->em_priv[pmp]; 1163 } else { 1164 return -EINVAL; 1165 } 1166 1167 /* mask off the activity bits if we are in sw_activity 1168 * mode, user should turn off sw_activity before setting 1169 * activity led through em_message 1170 */ 1171 if (emp->blink_policy) 1172 state &= ~EM_MSG_LED_VALUE_ACTIVITY; 1173 1174 return ap->ops->transmit_led_message(ap, state, size); 1175 } 1176 1177 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) 1178 { 1179 struct ata_link *link = dev->link; 1180 struct ata_port *ap = link->ap; 1181 struct ahci_port_priv *pp = ap->private_data; 1182 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1183 u32 port_led_state = emp->led_state; 1184 1185 /* save the desired Activity LED behavior */ 1186 if (val == OFF) { 1187 /* clear LFLAG */ 1188 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY); 1189 1190 /* set the LED to OFF */ 1191 port_led_state &= EM_MSG_LED_VALUE_OFF; 1192 port_led_state |= (ap->port_no | (link->pmp << 8)); 1193 ap->ops->transmit_led_message(ap, port_led_state, 4); 1194 } else { 1195 link->flags |= ATA_LFLAG_SW_ACTIVITY; 1196 if (val == BLINK_OFF) { 1197 /* set LED to ON for idle */ 1198 port_led_state &= EM_MSG_LED_VALUE_OFF; 1199 port_led_state |= (ap->port_no | (link->pmp << 8)); 1200 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */ 1201 ap->ops->transmit_led_message(ap, port_led_state, 4); 1202 } 1203 } 1204 emp->blink_policy = val; 1205 return 0; 1206 } 1207 1208 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf) 1209 { 1210 struct ata_link *link = dev->link; 1211 struct ata_port *ap = link->ap; 1212 struct ahci_port_priv *pp = ap->private_data; 1213 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1214 1215 /* display the saved value of activity behavior for this 1216 * disk. 1217 */ 1218 return sprintf(buf, "%d\n", emp->blink_policy); 1219 } 1220 1221 static void ahci_port_init(struct device *dev, struct ata_port *ap, 1222 int port_no, void __iomem *mmio, 1223 void __iomem *port_mmio) 1224 { 1225 struct ahci_host_priv *hpriv = ap->host->private_data; 1226 const char *emsg = NULL; 1227 int rc; 1228 u32 tmp; 1229 1230 /* make sure port is not active */ 1231 rc = ahci_deinit_port(ap, &emsg); 1232 if (rc) 1233 dev_warn(dev, "%s (%d)\n", emsg, rc); 1234 1235 /* clear SError */ 1236 tmp = readl(port_mmio + PORT_SCR_ERR); 1237 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp); 1238 writel(tmp, port_mmio + PORT_SCR_ERR); 1239 1240 /* clear port IRQ */ 1241 tmp = readl(port_mmio + PORT_IRQ_STAT); 1242 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp); 1243 if (tmp) 1244 writel(tmp, port_mmio + PORT_IRQ_STAT); 1245 1246 writel(1 << port_no, mmio + HOST_IRQ_STAT); 1247 1248 /* mark esata ports */ 1249 tmp = readl(port_mmio + PORT_CMD); 1250 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS)) 1251 ap->pflags |= ATA_PFLAG_EXTERNAL; 1252 } 1253 1254 void ahci_init_controller(struct ata_host *host) 1255 { 1256 struct ahci_host_priv *hpriv = host->private_data; 1257 void __iomem *mmio = hpriv->mmio; 1258 int i; 1259 void __iomem *port_mmio; 1260 u32 tmp; 1261 1262 for (i = 0; i < host->n_ports; i++) { 1263 struct ata_port *ap = host->ports[i]; 1264 1265 port_mmio = ahci_port_base(ap); 1266 if (ata_port_is_dummy(ap)) 1267 continue; 1268 1269 ahci_port_init(host->dev, ap, i, mmio, port_mmio); 1270 } 1271 1272 tmp = readl(mmio + HOST_CTL); 1273 VPRINTK("HOST_CTL 0x%x\n", tmp); 1274 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); 1275 tmp = readl(mmio + HOST_CTL); 1276 VPRINTK("HOST_CTL 0x%x\n", tmp); 1277 } 1278 EXPORT_SYMBOL_GPL(ahci_init_controller); 1279 1280 static void ahci_dev_config(struct ata_device *dev) 1281 { 1282 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data; 1283 1284 if (hpriv->flags & AHCI_HFLAG_SECT255) { 1285 dev->max_sectors = 255; 1286 ata_dev_info(dev, 1287 "SB600 AHCI: limiting to 255 sectors per cmd\n"); 1288 } 1289 } 1290 1291 unsigned int ahci_dev_classify(struct ata_port *ap) 1292 { 1293 void __iomem *port_mmio = ahci_port_base(ap); 1294 struct ata_taskfile tf; 1295 u32 tmp; 1296 1297 tmp = readl(port_mmio + PORT_SIG); 1298 tf.lbah = (tmp >> 24) & 0xff; 1299 tf.lbam = (tmp >> 16) & 0xff; 1300 tf.lbal = (tmp >> 8) & 0xff; 1301 tf.nsect = (tmp) & 0xff; 1302 1303 return ata_dev_classify(&tf); 1304 } 1305 EXPORT_SYMBOL_GPL(ahci_dev_classify); 1306 1307 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, 1308 u32 opts) 1309 { 1310 dma_addr_t cmd_tbl_dma; 1311 1312 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ; 1313 1314 pp->cmd_slot[tag].opts = cpu_to_le32(opts); 1315 pp->cmd_slot[tag].status = 0; 1316 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff); 1317 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16); 1318 } 1319 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot); 1320 1321 int ahci_kick_engine(struct ata_port *ap) 1322 { 1323 void __iomem *port_mmio = ahci_port_base(ap); 1324 struct ahci_host_priv *hpriv = ap->host->private_data; 1325 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1326 u32 tmp; 1327 int busy, rc; 1328 1329 /* stop engine */ 1330 rc = hpriv->stop_engine(ap); 1331 if (rc) 1332 goto out_restart; 1333 1334 /* need to do CLO? 1335 * always do CLO if PMP is attached (AHCI-1.3 9.2) 1336 */ 1337 busy = status & (ATA_BUSY | ATA_DRQ); 1338 if (!busy && !sata_pmp_attached(ap)) { 1339 rc = 0; 1340 goto out_restart; 1341 } 1342 1343 if (!(hpriv->cap & HOST_CAP_CLO)) { 1344 rc = -EOPNOTSUPP; 1345 goto out_restart; 1346 } 1347 1348 /* perform CLO */ 1349 tmp = readl(port_mmio + PORT_CMD); 1350 tmp |= PORT_CMD_CLO; 1351 writel(tmp, port_mmio + PORT_CMD); 1352 1353 rc = 0; 1354 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, 1355 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); 1356 if (tmp & PORT_CMD_CLO) 1357 rc = -EIO; 1358 1359 /* restart engine */ 1360 out_restart: 1361 hpriv->start_engine(ap); 1362 return rc; 1363 } 1364 EXPORT_SYMBOL_GPL(ahci_kick_engine); 1365 1366 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp, 1367 struct ata_taskfile *tf, int is_cmd, u16 flags, 1368 unsigned long timeout_msec) 1369 { 1370 const u32 cmd_fis_len = 5; /* five dwords */ 1371 struct ahci_port_priv *pp = ap->private_data; 1372 void __iomem *port_mmio = ahci_port_base(ap); 1373 u8 *fis = pp->cmd_tbl; 1374 u32 tmp; 1375 1376 /* prep the command */ 1377 ata_tf_to_fis(tf, pmp, is_cmd, fis); 1378 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12)); 1379 1380 /* set port value for softreset of Port Multiplier */ 1381 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) { 1382 tmp = readl(port_mmio + PORT_FBS); 1383 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); 1384 tmp |= pmp << PORT_FBS_DEV_OFFSET; 1385 writel(tmp, port_mmio + PORT_FBS); 1386 pp->fbs_last_dev = pmp; 1387 } 1388 1389 /* issue & wait */ 1390 writel(1, port_mmio + PORT_CMD_ISSUE); 1391 1392 if (timeout_msec) { 1393 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE, 1394 0x1, 0x1, 1, timeout_msec); 1395 if (tmp & 0x1) { 1396 ahci_kick_engine(ap); 1397 return -EBUSY; 1398 } 1399 } else 1400 readl(port_mmio + PORT_CMD_ISSUE); /* flush */ 1401 1402 return 0; 1403 } 1404 1405 int ahci_do_softreset(struct ata_link *link, unsigned int *class, 1406 int pmp, unsigned long deadline, 1407 int (*check_ready)(struct ata_link *link)) 1408 { 1409 struct ata_port *ap = link->ap; 1410 struct ahci_host_priv *hpriv = ap->host->private_data; 1411 struct ahci_port_priv *pp = ap->private_data; 1412 const char *reason = NULL; 1413 unsigned long now, msecs; 1414 struct ata_taskfile tf; 1415 bool fbs_disabled = false; 1416 int rc; 1417 1418 DPRINTK("ENTER\n"); 1419 1420 /* prepare for SRST (AHCI-1.1 10.4.1) */ 1421 rc = ahci_kick_engine(ap); 1422 if (rc && rc != -EOPNOTSUPP) 1423 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc); 1424 1425 /* 1426 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall 1427 * clear PxFBS.EN to '0' prior to issuing software reset to devices 1428 * that is attached to port multiplier. 1429 */ 1430 if (!ata_is_host_link(link) && pp->fbs_enabled) { 1431 ahci_disable_fbs(ap); 1432 fbs_disabled = true; 1433 } 1434 1435 ata_tf_init(link->device, &tf); 1436 1437 /* issue the first H2D Register FIS */ 1438 msecs = 0; 1439 now = jiffies; 1440 if (time_after(deadline, now)) 1441 msecs = jiffies_to_msecs(deadline - now); 1442 1443 tf.ctl |= ATA_SRST; 1444 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0, 1445 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) { 1446 rc = -EIO; 1447 reason = "1st FIS failed"; 1448 goto fail; 1449 } 1450 1451 /* spec says at least 5us, but be generous and sleep for 1ms */ 1452 ata_msleep(ap, 1); 1453 1454 /* issue the second H2D Register FIS */ 1455 tf.ctl &= ~ATA_SRST; 1456 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0); 1457 1458 /* wait for link to become ready */ 1459 rc = ata_wait_after_reset(link, deadline, check_ready); 1460 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) { 1461 /* 1462 * Workaround for cases where link online status can't 1463 * be trusted. Treat device readiness timeout as link 1464 * offline. 1465 */ 1466 ata_link_info(link, "device not ready, treating as offline\n"); 1467 *class = ATA_DEV_NONE; 1468 } else if (rc) { 1469 /* link occupied, -ENODEV too is an error */ 1470 reason = "device not ready"; 1471 goto fail; 1472 } else 1473 *class = ahci_dev_classify(ap); 1474 1475 /* re-enable FBS if disabled before */ 1476 if (fbs_disabled) 1477 ahci_enable_fbs(ap); 1478 1479 DPRINTK("EXIT, class=%u\n", *class); 1480 return 0; 1481 1482 fail: 1483 ata_link_err(link, "softreset failed (%s)\n", reason); 1484 return rc; 1485 } 1486 1487 int ahci_check_ready(struct ata_link *link) 1488 { 1489 void __iomem *port_mmio = ahci_port_base(link->ap); 1490 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1491 1492 return ata_check_ready(status); 1493 } 1494 EXPORT_SYMBOL_GPL(ahci_check_ready); 1495 1496 static int ahci_softreset(struct ata_link *link, unsigned int *class, 1497 unsigned long deadline) 1498 { 1499 int pmp = sata_srst_pmp(link); 1500 1501 DPRINTK("ENTER\n"); 1502 1503 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready); 1504 } 1505 EXPORT_SYMBOL_GPL(ahci_do_softreset); 1506 1507 static int ahci_bad_pmp_check_ready(struct ata_link *link) 1508 { 1509 void __iomem *port_mmio = ahci_port_base(link->ap); 1510 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1511 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT); 1512 1513 /* 1514 * There is no need to check TFDATA if BAD PMP is found due to HW bug, 1515 * which can save timeout delay. 1516 */ 1517 if (irq_status & PORT_IRQ_BAD_PMP) 1518 return -EIO; 1519 1520 return ata_check_ready(status); 1521 } 1522 1523 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, 1524 unsigned long deadline) 1525 { 1526 struct ata_port *ap = link->ap; 1527 void __iomem *port_mmio = ahci_port_base(ap); 1528 int pmp = sata_srst_pmp(link); 1529 int rc; 1530 u32 irq_sts; 1531 1532 DPRINTK("ENTER\n"); 1533 1534 rc = ahci_do_softreset(link, class, pmp, deadline, 1535 ahci_bad_pmp_check_ready); 1536 1537 /* 1538 * Soft reset fails with IPMS set when PMP is enabled but 1539 * SATA HDD/ODD is connected to SATA port, do soft reset 1540 * again to port 0. 1541 */ 1542 if (rc == -EIO) { 1543 irq_sts = readl(port_mmio + PORT_IRQ_STAT); 1544 if (irq_sts & PORT_IRQ_BAD_PMP) { 1545 ata_link_warn(link, 1546 "applying PMP SRST workaround " 1547 "and retrying\n"); 1548 rc = ahci_do_softreset(link, class, 0, deadline, 1549 ahci_check_ready); 1550 } 1551 } 1552 1553 return rc; 1554 } 1555 1556 int ahci_do_hardreset(struct ata_link *link, unsigned int *class, 1557 unsigned long deadline, bool *online) 1558 { 1559 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 1560 struct ata_port *ap = link->ap; 1561 struct ahci_port_priv *pp = ap->private_data; 1562 struct ahci_host_priv *hpriv = ap->host->private_data; 1563 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; 1564 struct ata_taskfile tf; 1565 int rc; 1566 1567 DPRINTK("ENTER\n"); 1568 1569 hpriv->stop_engine(ap); 1570 1571 /* clear D2H reception area to properly wait for D2H FIS */ 1572 ata_tf_init(link->device, &tf); 1573 tf.command = ATA_BUSY; 1574 ata_tf_to_fis(&tf, 0, 0, d2h_fis); 1575 1576 rc = sata_link_hardreset(link, timing, deadline, online, 1577 ahci_check_ready); 1578 1579 hpriv->start_engine(ap); 1580 1581 if (*online) 1582 *class = ahci_dev_classify(ap); 1583 1584 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); 1585 return rc; 1586 } 1587 EXPORT_SYMBOL_GPL(ahci_do_hardreset); 1588 1589 static int ahci_hardreset(struct ata_link *link, unsigned int *class, 1590 unsigned long deadline) 1591 { 1592 bool online; 1593 1594 return ahci_do_hardreset(link, class, deadline, &online); 1595 } 1596 1597 static void ahci_postreset(struct ata_link *link, unsigned int *class) 1598 { 1599 struct ata_port *ap = link->ap; 1600 void __iomem *port_mmio = ahci_port_base(ap); 1601 u32 new_tmp, tmp; 1602 1603 ata_std_postreset(link, class); 1604 1605 /* Make sure port's ATAPI bit is set appropriately */ 1606 new_tmp = tmp = readl(port_mmio + PORT_CMD); 1607 if (*class == ATA_DEV_ATAPI) 1608 new_tmp |= PORT_CMD_ATAPI; 1609 else 1610 new_tmp &= ~PORT_CMD_ATAPI; 1611 if (new_tmp != tmp) { 1612 writel(new_tmp, port_mmio + PORT_CMD); 1613 readl(port_mmio + PORT_CMD); /* flush */ 1614 } 1615 } 1616 1617 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) 1618 { 1619 struct scatterlist *sg; 1620 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; 1621 unsigned int si; 1622 1623 VPRINTK("ENTER\n"); 1624 1625 /* 1626 * Next, the S/G list. 1627 */ 1628 for_each_sg(qc->sg, sg, qc->n_elem, si) { 1629 dma_addr_t addr = sg_dma_address(sg); 1630 u32 sg_len = sg_dma_len(sg); 1631 1632 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff); 1633 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16); 1634 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1); 1635 } 1636 1637 return si; 1638 } 1639 1640 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc) 1641 { 1642 struct ata_port *ap = qc->ap; 1643 struct ahci_port_priv *pp = ap->private_data; 1644 1645 if (!sata_pmp_attached(ap) || pp->fbs_enabled) 1646 return ata_std_qc_defer(qc); 1647 else 1648 return sata_pmp_qc_defer_cmd_switch(qc); 1649 } 1650 1651 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc) 1652 { 1653 struct ata_port *ap = qc->ap; 1654 struct ahci_port_priv *pp = ap->private_data; 1655 int is_atapi = ata_is_atapi(qc->tf.protocol); 1656 void *cmd_tbl; 1657 u32 opts; 1658 const u32 cmd_fis_len = 5; /* five dwords */ 1659 unsigned int n_elem; 1660 1661 /* 1662 * Fill in command table information. First, the header, 1663 * a SATA Register - Host to Device command FIS. 1664 */ 1665 cmd_tbl = pp->cmd_tbl + qc->hw_tag * AHCI_CMD_TBL_SZ; 1666 1667 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl); 1668 if (is_atapi) { 1669 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); 1670 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); 1671 } 1672 1673 n_elem = 0; 1674 if (qc->flags & ATA_QCFLAG_DMAMAP) 1675 n_elem = ahci_fill_sg(qc, cmd_tbl); 1676 1677 /* 1678 * Fill in command slot information. 1679 */ 1680 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12); 1681 if (qc->tf.flags & ATA_TFLAG_WRITE) 1682 opts |= AHCI_CMD_WRITE; 1683 if (is_atapi) 1684 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; 1685 1686 ahci_fill_cmd_slot(pp, qc->hw_tag, opts); 1687 1688 return AC_ERR_OK; 1689 } 1690 1691 static void ahci_fbs_dec_intr(struct ata_port *ap) 1692 { 1693 struct ahci_port_priv *pp = ap->private_data; 1694 void __iomem *port_mmio = ahci_port_base(ap); 1695 u32 fbs = readl(port_mmio + PORT_FBS); 1696 int retries = 3; 1697 1698 DPRINTK("ENTER\n"); 1699 BUG_ON(!pp->fbs_enabled); 1700 1701 /* time to wait for DEC is not specified by AHCI spec, 1702 * add a retry loop for safety. 1703 */ 1704 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS); 1705 fbs = readl(port_mmio + PORT_FBS); 1706 while ((fbs & PORT_FBS_DEC) && retries--) { 1707 udelay(1); 1708 fbs = readl(port_mmio + PORT_FBS); 1709 } 1710 1711 if (fbs & PORT_FBS_DEC) 1712 dev_err(ap->host->dev, "failed to clear device error\n"); 1713 } 1714 1715 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) 1716 { 1717 struct ahci_host_priv *hpriv = ap->host->private_data; 1718 struct ahci_port_priv *pp = ap->private_data; 1719 struct ata_eh_info *host_ehi = &ap->link.eh_info; 1720 struct ata_link *link = NULL; 1721 struct ata_queued_cmd *active_qc; 1722 struct ata_eh_info *active_ehi; 1723 bool fbs_need_dec = false; 1724 u32 serror; 1725 1726 /* determine active link with error */ 1727 if (pp->fbs_enabled) { 1728 void __iomem *port_mmio = ahci_port_base(ap); 1729 u32 fbs = readl(port_mmio + PORT_FBS); 1730 int pmp = fbs >> PORT_FBS_DWE_OFFSET; 1731 1732 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) { 1733 link = &ap->pmp_link[pmp]; 1734 fbs_need_dec = true; 1735 } 1736 1737 } else 1738 ata_for_each_link(link, ap, EDGE) 1739 if (ata_link_active(link)) 1740 break; 1741 1742 if (!link) 1743 link = &ap->link; 1744 1745 active_qc = ata_qc_from_tag(ap, link->active_tag); 1746 active_ehi = &link->eh_info; 1747 1748 /* record irq stat */ 1749 ata_ehi_clear_desc(host_ehi); 1750 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); 1751 1752 /* AHCI needs SError cleared; otherwise, it might lock up */ 1753 ahci_scr_read(&ap->link, SCR_ERROR, &serror); 1754 ahci_scr_write(&ap->link, SCR_ERROR, serror); 1755 host_ehi->serror |= serror; 1756 1757 /* some controllers set IRQ_IF_ERR on device errors, ignore it */ 1758 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR) 1759 irq_stat &= ~PORT_IRQ_IF_ERR; 1760 1761 if (irq_stat & PORT_IRQ_TF_ERR) { 1762 /* If qc is active, charge it; otherwise, the active 1763 * link. There's no active qc on NCQ errors. It will 1764 * be determined by EH by reading log page 10h. 1765 */ 1766 if (active_qc) 1767 active_qc->err_mask |= AC_ERR_DEV; 1768 else 1769 active_ehi->err_mask |= AC_ERR_DEV; 1770 1771 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL) 1772 host_ehi->serror &= ~SERR_INTERNAL; 1773 } 1774 1775 if (irq_stat & PORT_IRQ_UNK_FIS) { 1776 u32 *unk = pp->rx_fis + RX_FIS_UNK; 1777 1778 active_ehi->err_mask |= AC_ERR_HSM; 1779 active_ehi->action |= ATA_EH_RESET; 1780 ata_ehi_push_desc(active_ehi, 1781 "unknown FIS %08x %08x %08x %08x" , 1782 unk[0], unk[1], unk[2], unk[3]); 1783 } 1784 1785 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) { 1786 active_ehi->err_mask |= AC_ERR_HSM; 1787 active_ehi->action |= ATA_EH_RESET; 1788 ata_ehi_push_desc(active_ehi, "incorrect PMP"); 1789 } 1790 1791 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { 1792 host_ehi->err_mask |= AC_ERR_HOST_BUS; 1793 host_ehi->action |= ATA_EH_RESET; 1794 ata_ehi_push_desc(host_ehi, "host bus error"); 1795 } 1796 1797 if (irq_stat & PORT_IRQ_IF_ERR) { 1798 if (fbs_need_dec) 1799 active_ehi->err_mask |= AC_ERR_DEV; 1800 else { 1801 host_ehi->err_mask |= AC_ERR_ATA_BUS; 1802 host_ehi->action |= ATA_EH_RESET; 1803 } 1804 1805 ata_ehi_push_desc(host_ehi, "interface fatal error"); 1806 } 1807 1808 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { 1809 ata_ehi_hotplugged(host_ehi); 1810 ata_ehi_push_desc(host_ehi, "%s", 1811 irq_stat & PORT_IRQ_CONNECT ? 1812 "connection status changed" : "PHY RDY changed"); 1813 } 1814 1815 /* okay, let's hand over to EH */ 1816 1817 if (irq_stat & PORT_IRQ_FREEZE) 1818 ata_port_freeze(ap); 1819 else if (fbs_need_dec) { 1820 ata_link_abort(link); 1821 ahci_fbs_dec_intr(ap); 1822 } else 1823 ata_port_abort(ap); 1824 } 1825 1826 static void ahci_handle_port_interrupt(struct ata_port *ap, 1827 void __iomem *port_mmio, u32 status) 1828 { 1829 struct ata_eh_info *ehi = &ap->link.eh_info; 1830 struct ahci_port_priv *pp = ap->private_data; 1831 struct ahci_host_priv *hpriv = ap->host->private_data; 1832 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING); 1833 u32 qc_active = 0; 1834 int rc; 1835 1836 /* ignore BAD_PMP while resetting */ 1837 if (unlikely(resetting)) 1838 status &= ~PORT_IRQ_BAD_PMP; 1839 1840 if (sata_lpm_ignore_phy_events(&ap->link)) { 1841 status &= ~PORT_IRQ_PHYRDY; 1842 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG); 1843 } 1844 1845 if (unlikely(status & PORT_IRQ_ERROR)) { 1846 ahci_error_intr(ap, status); 1847 return; 1848 } 1849 1850 if (status & PORT_IRQ_SDB_FIS) { 1851 /* If SNotification is available, leave notification 1852 * handling to sata_async_notification(). If not, 1853 * emulate it by snooping SDB FIS RX area. 1854 * 1855 * Snooping FIS RX area is probably cheaper than 1856 * poking SNotification but some constrollers which 1857 * implement SNotification, ICH9 for example, don't 1858 * store AN SDB FIS into receive area. 1859 */ 1860 if (hpriv->cap & HOST_CAP_SNTF) 1861 sata_async_notification(ap); 1862 else { 1863 /* If the 'N' bit in word 0 of the FIS is set, 1864 * we just received asynchronous notification. 1865 * Tell libata about it. 1866 * 1867 * Lack of SNotification should not appear in 1868 * ahci 1.2, so the workaround is unnecessary 1869 * when FBS is enabled. 1870 */ 1871 if (pp->fbs_enabled) 1872 WARN_ON_ONCE(1); 1873 else { 1874 const __le32 *f = pp->rx_fis + RX_FIS_SDB; 1875 u32 f0 = le32_to_cpu(f[0]); 1876 if (f0 & (1 << 15)) 1877 sata_async_notification(ap); 1878 } 1879 } 1880 } 1881 1882 /* pp->active_link is not reliable once FBS is enabled, both 1883 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because 1884 * NCQ and non-NCQ commands may be in flight at the same time. 1885 */ 1886 if (pp->fbs_enabled) { 1887 if (ap->qc_active) { 1888 qc_active = readl(port_mmio + PORT_SCR_ACT); 1889 qc_active |= readl(port_mmio + PORT_CMD_ISSUE); 1890 } 1891 } else { 1892 /* pp->active_link is valid iff any command is in flight */ 1893 if (ap->qc_active && pp->active_link->sactive) 1894 qc_active = readl(port_mmio + PORT_SCR_ACT); 1895 else 1896 qc_active = readl(port_mmio + PORT_CMD_ISSUE); 1897 } 1898 1899 1900 rc = ata_qc_complete_multiple(ap, qc_active); 1901 1902 /* while resetting, invalid completions are expected */ 1903 if (unlikely(rc < 0 && !resetting)) { 1904 ehi->err_mask |= AC_ERR_HSM; 1905 ehi->action |= ATA_EH_RESET; 1906 ata_port_freeze(ap); 1907 } 1908 } 1909 1910 static void ahci_port_intr(struct ata_port *ap) 1911 { 1912 void __iomem *port_mmio = ahci_port_base(ap); 1913 u32 status; 1914 1915 status = readl(port_mmio + PORT_IRQ_STAT); 1916 writel(status, port_mmio + PORT_IRQ_STAT); 1917 1918 ahci_handle_port_interrupt(ap, port_mmio, status); 1919 } 1920 1921 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance) 1922 { 1923 struct ata_port *ap = dev_instance; 1924 void __iomem *port_mmio = ahci_port_base(ap); 1925 u32 status; 1926 1927 VPRINTK("ENTER\n"); 1928 1929 status = readl(port_mmio + PORT_IRQ_STAT); 1930 writel(status, port_mmio + PORT_IRQ_STAT); 1931 1932 spin_lock(ap->lock); 1933 ahci_handle_port_interrupt(ap, port_mmio, status); 1934 spin_unlock(ap->lock); 1935 1936 VPRINTK("EXIT\n"); 1937 1938 return IRQ_HANDLED; 1939 } 1940 1941 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked) 1942 { 1943 unsigned int i, handled = 0; 1944 1945 for (i = 0; i < host->n_ports; i++) { 1946 struct ata_port *ap; 1947 1948 if (!(irq_masked & (1 << i))) 1949 continue; 1950 1951 ap = host->ports[i]; 1952 if (ap) { 1953 ahci_port_intr(ap); 1954 VPRINTK("port %u\n", i); 1955 } else { 1956 VPRINTK("port %u (no irq)\n", i); 1957 if (ata_ratelimit()) 1958 dev_warn(host->dev, 1959 "interrupt on disabled port %u\n", i); 1960 } 1961 1962 handled = 1; 1963 } 1964 1965 return handled; 1966 } 1967 EXPORT_SYMBOL_GPL(ahci_handle_port_intr); 1968 1969 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance) 1970 { 1971 struct ata_host *host = dev_instance; 1972 struct ahci_host_priv *hpriv; 1973 unsigned int rc = 0; 1974 void __iomem *mmio; 1975 u32 irq_stat, irq_masked; 1976 1977 VPRINTK("ENTER\n"); 1978 1979 hpriv = host->private_data; 1980 mmio = hpriv->mmio; 1981 1982 /* sigh. 0xffffffff is a valid return from h/w */ 1983 irq_stat = readl(mmio + HOST_IRQ_STAT); 1984 if (!irq_stat) 1985 return IRQ_NONE; 1986 1987 irq_masked = irq_stat & hpriv->port_map; 1988 1989 spin_lock(&host->lock); 1990 1991 rc = ahci_handle_port_intr(host, irq_masked); 1992 1993 /* HOST_IRQ_STAT behaves as level triggered latch meaning that 1994 * it should be cleared after all the port events are cleared; 1995 * otherwise, it will raise a spurious interrupt after each 1996 * valid one. Please read section 10.6.2 of ahci 1.1 for more 1997 * information. 1998 * 1999 * Also, use the unmasked value to clear interrupt as spurious 2000 * pending event on a dummy port might cause screaming IRQ. 2001 */ 2002 writel(irq_stat, mmio + HOST_IRQ_STAT); 2003 2004 spin_unlock(&host->lock); 2005 2006 VPRINTK("EXIT\n"); 2007 2008 return IRQ_RETVAL(rc); 2009 } 2010 2011 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) 2012 { 2013 struct ata_port *ap = qc->ap; 2014 void __iomem *port_mmio = ahci_port_base(ap); 2015 struct ahci_port_priv *pp = ap->private_data; 2016 2017 /* Keep track of the currently active link. It will be used 2018 * in completion path to determine whether NCQ phase is in 2019 * progress. 2020 */ 2021 pp->active_link = qc->dev->link; 2022 2023 if (ata_is_ncq(qc->tf.protocol)) 2024 writel(1 << qc->hw_tag, port_mmio + PORT_SCR_ACT); 2025 2026 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) { 2027 u32 fbs = readl(port_mmio + PORT_FBS); 2028 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); 2029 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET; 2030 writel(fbs, port_mmio + PORT_FBS); 2031 pp->fbs_last_dev = qc->dev->link->pmp; 2032 } 2033 2034 writel(1 << qc->hw_tag, port_mmio + PORT_CMD_ISSUE); 2035 2036 ahci_sw_activity(qc->dev->link); 2037 2038 return 0; 2039 } 2040 EXPORT_SYMBOL_GPL(ahci_qc_issue); 2041 2042 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc) 2043 { 2044 struct ahci_port_priv *pp = qc->ap->private_data; 2045 u8 *rx_fis = pp->rx_fis; 2046 2047 if (pp->fbs_enabled) 2048 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; 2049 2050 /* 2051 * After a successful execution of an ATA PIO data-in command, 2052 * the device doesn't send D2H Reg FIS to update the TF and 2053 * the host should take TF and E_Status from the preceding PIO 2054 * Setup FIS. 2055 */ 2056 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE && 2057 !(qc->flags & ATA_QCFLAG_FAILED)) { 2058 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf); 2059 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15]; 2060 } else 2061 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf); 2062 2063 return true; 2064 } 2065 2066 static void ahci_freeze(struct ata_port *ap) 2067 { 2068 void __iomem *port_mmio = ahci_port_base(ap); 2069 2070 /* turn IRQ off */ 2071 writel(0, port_mmio + PORT_IRQ_MASK); 2072 } 2073 2074 static void ahci_thaw(struct ata_port *ap) 2075 { 2076 struct ahci_host_priv *hpriv = ap->host->private_data; 2077 void __iomem *mmio = hpriv->mmio; 2078 void __iomem *port_mmio = ahci_port_base(ap); 2079 u32 tmp; 2080 struct ahci_port_priv *pp = ap->private_data; 2081 2082 /* clear IRQ */ 2083 tmp = readl(port_mmio + PORT_IRQ_STAT); 2084 writel(tmp, port_mmio + PORT_IRQ_STAT); 2085 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT); 2086 2087 /* turn IRQ back on */ 2088 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2089 } 2090 2091 void ahci_error_handler(struct ata_port *ap) 2092 { 2093 struct ahci_host_priv *hpriv = ap->host->private_data; 2094 2095 if (!(ap->pflags & ATA_PFLAG_FROZEN)) { 2096 /* restart engine */ 2097 hpriv->stop_engine(ap); 2098 hpriv->start_engine(ap); 2099 } 2100 2101 sata_pmp_error_handler(ap); 2102 2103 if (!ata_dev_enabled(ap->link.device)) 2104 hpriv->stop_engine(ap); 2105 } 2106 EXPORT_SYMBOL_GPL(ahci_error_handler); 2107 2108 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) 2109 { 2110 struct ata_port *ap = qc->ap; 2111 2112 /* make DMA engine forget about the failed command */ 2113 if (qc->flags & ATA_QCFLAG_FAILED) 2114 ahci_kick_engine(ap); 2115 } 2116 2117 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep) 2118 { 2119 struct ahci_host_priv *hpriv = ap->host->private_data; 2120 void __iomem *port_mmio = ahci_port_base(ap); 2121 struct ata_device *dev = ap->link.device; 2122 u32 devslp, dm, dito, mdat, deto, dito_conf; 2123 int rc; 2124 unsigned int err_mask; 2125 2126 devslp = readl(port_mmio + PORT_DEVSLP); 2127 if (!(devslp & PORT_DEVSLP_DSP)) { 2128 dev_info(ap->host->dev, "port does not support device sleep\n"); 2129 return; 2130 } 2131 2132 /* disable device sleep */ 2133 if (!sleep) { 2134 if (devslp & PORT_DEVSLP_ADSE) { 2135 writel(devslp & ~PORT_DEVSLP_ADSE, 2136 port_mmio + PORT_DEVSLP); 2137 err_mask = ata_dev_set_feature(dev, 2138 SETFEATURES_SATA_DISABLE, 2139 SATA_DEVSLP); 2140 if (err_mask && err_mask != AC_ERR_DEV) 2141 ata_dev_warn(dev, "failed to disable DEVSLP\n"); 2142 } 2143 return; 2144 } 2145 2146 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET; 2147 dito = devslp_idle_timeout / (dm + 1); 2148 if (dito > 0x3ff) 2149 dito = 0x3ff; 2150 2151 dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF; 2152 2153 /* device sleep was already enabled and same dito */ 2154 if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito)) 2155 return; 2156 2157 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */ 2158 rc = hpriv->stop_engine(ap); 2159 if (rc) 2160 return; 2161 2162 /* Use the nominal value 10 ms if the read MDAT is zero, 2163 * the nominal value of DETO is 20 ms. 2164 */ 2165 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] & 2166 ATA_LOG_DEVSLP_VALID_MASK) { 2167 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] & 2168 ATA_LOG_DEVSLP_MDAT_MASK; 2169 if (!mdat) 2170 mdat = 10; 2171 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO]; 2172 if (!deto) 2173 deto = 20; 2174 } else { 2175 mdat = 10; 2176 deto = 20; 2177 } 2178 2179 /* Make dito, mdat, deto bits to 0s */ 2180 devslp &= ~GENMASK_ULL(24, 2); 2181 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) | 2182 (mdat << PORT_DEVSLP_MDAT_OFFSET) | 2183 (deto << PORT_DEVSLP_DETO_OFFSET) | 2184 PORT_DEVSLP_ADSE); 2185 writel(devslp, port_mmio + PORT_DEVSLP); 2186 2187 hpriv->start_engine(ap); 2188 2189 /* enable device sleep feature for the drive */ 2190 err_mask = ata_dev_set_feature(dev, 2191 SETFEATURES_SATA_ENABLE, 2192 SATA_DEVSLP); 2193 if (err_mask && err_mask != AC_ERR_DEV) 2194 ata_dev_warn(dev, "failed to enable DEVSLP\n"); 2195 } 2196 2197 static void ahci_enable_fbs(struct ata_port *ap) 2198 { 2199 struct ahci_host_priv *hpriv = ap->host->private_data; 2200 struct ahci_port_priv *pp = ap->private_data; 2201 void __iomem *port_mmio = ahci_port_base(ap); 2202 u32 fbs; 2203 int rc; 2204 2205 if (!pp->fbs_supported) 2206 return; 2207 2208 fbs = readl(port_mmio + PORT_FBS); 2209 if (fbs & PORT_FBS_EN) { 2210 pp->fbs_enabled = true; 2211 pp->fbs_last_dev = -1; /* initialization */ 2212 return; 2213 } 2214 2215 rc = hpriv->stop_engine(ap); 2216 if (rc) 2217 return; 2218 2219 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS); 2220 fbs = readl(port_mmio + PORT_FBS); 2221 if (fbs & PORT_FBS_EN) { 2222 dev_info(ap->host->dev, "FBS is enabled\n"); 2223 pp->fbs_enabled = true; 2224 pp->fbs_last_dev = -1; /* initialization */ 2225 } else 2226 dev_err(ap->host->dev, "Failed to enable FBS\n"); 2227 2228 hpriv->start_engine(ap); 2229 } 2230 2231 static void ahci_disable_fbs(struct ata_port *ap) 2232 { 2233 struct ahci_host_priv *hpriv = ap->host->private_data; 2234 struct ahci_port_priv *pp = ap->private_data; 2235 void __iomem *port_mmio = ahci_port_base(ap); 2236 u32 fbs; 2237 int rc; 2238 2239 if (!pp->fbs_supported) 2240 return; 2241 2242 fbs = readl(port_mmio + PORT_FBS); 2243 if ((fbs & PORT_FBS_EN) == 0) { 2244 pp->fbs_enabled = false; 2245 return; 2246 } 2247 2248 rc = hpriv->stop_engine(ap); 2249 if (rc) 2250 return; 2251 2252 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS); 2253 fbs = readl(port_mmio + PORT_FBS); 2254 if (fbs & PORT_FBS_EN) 2255 dev_err(ap->host->dev, "Failed to disable FBS\n"); 2256 else { 2257 dev_info(ap->host->dev, "FBS is disabled\n"); 2258 pp->fbs_enabled = false; 2259 } 2260 2261 hpriv->start_engine(ap); 2262 } 2263 2264 static void ahci_pmp_attach(struct ata_port *ap) 2265 { 2266 void __iomem *port_mmio = ahci_port_base(ap); 2267 struct ahci_port_priv *pp = ap->private_data; 2268 u32 cmd; 2269 2270 cmd = readl(port_mmio + PORT_CMD); 2271 cmd |= PORT_CMD_PMP; 2272 writel(cmd, port_mmio + PORT_CMD); 2273 2274 ahci_enable_fbs(ap); 2275 2276 pp->intr_mask |= PORT_IRQ_BAD_PMP; 2277 2278 /* 2279 * We must not change the port interrupt mask register if the 2280 * port is marked frozen, the value in pp->intr_mask will be 2281 * restored later when the port is thawed. 2282 * 2283 * Note that during initialization, the port is marked as 2284 * frozen since the irq handler is not yet registered. 2285 */ 2286 if (!(ap->pflags & ATA_PFLAG_FROZEN)) 2287 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2288 } 2289 2290 static void ahci_pmp_detach(struct ata_port *ap) 2291 { 2292 void __iomem *port_mmio = ahci_port_base(ap); 2293 struct ahci_port_priv *pp = ap->private_data; 2294 u32 cmd; 2295 2296 ahci_disable_fbs(ap); 2297 2298 cmd = readl(port_mmio + PORT_CMD); 2299 cmd &= ~PORT_CMD_PMP; 2300 writel(cmd, port_mmio + PORT_CMD); 2301 2302 pp->intr_mask &= ~PORT_IRQ_BAD_PMP; 2303 2304 /* see comment above in ahci_pmp_attach() */ 2305 if (!(ap->pflags & ATA_PFLAG_FROZEN)) 2306 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2307 } 2308 2309 int ahci_port_resume(struct ata_port *ap) 2310 { 2311 ahci_rpm_get_port(ap); 2312 2313 ahci_power_up(ap); 2314 ahci_start_port(ap); 2315 2316 if (sata_pmp_attached(ap)) 2317 ahci_pmp_attach(ap); 2318 else 2319 ahci_pmp_detach(ap); 2320 2321 return 0; 2322 } 2323 EXPORT_SYMBOL_GPL(ahci_port_resume); 2324 2325 #ifdef CONFIG_PM 2326 static void ahci_handle_s2idle(struct ata_port *ap) 2327 { 2328 void __iomem *port_mmio = ahci_port_base(ap); 2329 u32 devslp; 2330 2331 if (pm_suspend_via_firmware()) 2332 return; 2333 devslp = readl(port_mmio + PORT_DEVSLP); 2334 if ((devslp & PORT_DEVSLP_ADSE)) 2335 ata_msleep(ap, devslp_idle_timeout); 2336 } 2337 2338 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) 2339 { 2340 const char *emsg = NULL; 2341 int rc; 2342 2343 rc = ahci_deinit_port(ap, &emsg); 2344 if (rc == 0) 2345 ahci_power_down(ap); 2346 else { 2347 ata_port_err(ap, "%s (%d)\n", emsg, rc); 2348 ata_port_freeze(ap); 2349 } 2350 2351 if (acpi_storage_d3(ap->host->dev)) 2352 ahci_handle_s2idle(ap); 2353 2354 ahci_rpm_put_port(ap); 2355 return rc; 2356 } 2357 #endif 2358 2359 static int ahci_port_start(struct ata_port *ap) 2360 { 2361 struct ahci_host_priv *hpriv = ap->host->private_data; 2362 struct device *dev = ap->host->dev; 2363 struct ahci_port_priv *pp; 2364 void *mem; 2365 dma_addr_t mem_dma; 2366 size_t dma_sz, rx_fis_sz; 2367 2368 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 2369 if (!pp) 2370 return -ENOMEM; 2371 2372 if (ap->host->n_ports > 1) { 2373 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL); 2374 if (!pp->irq_desc) { 2375 devm_kfree(dev, pp); 2376 return -ENOMEM; 2377 } 2378 snprintf(pp->irq_desc, 8, 2379 "%s%d", dev_driver_string(dev), ap->port_no); 2380 } 2381 2382 /* check FBS capability */ 2383 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) { 2384 void __iomem *port_mmio = ahci_port_base(ap); 2385 u32 cmd = readl(port_mmio + PORT_CMD); 2386 if (cmd & PORT_CMD_FBSCP) 2387 pp->fbs_supported = true; 2388 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) { 2389 dev_info(dev, "port %d can do FBS, forcing FBSCP\n", 2390 ap->port_no); 2391 pp->fbs_supported = true; 2392 } else 2393 dev_warn(dev, "port %d is not capable of FBS\n", 2394 ap->port_no); 2395 } 2396 2397 if (pp->fbs_supported) { 2398 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ; 2399 rx_fis_sz = AHCI_RX_FIS_SZ * 16; 2400 } else { 2401 dma_sz = AHCI_PORT_PRIV_DMA_SZ; 2402 rx_fis_sz = AHCI_RX_FIS_SZ; 2403 } 2404 2405 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL); 2406 if (!mem) 2407 return -ENOMEM; 2408 2409 /* 2410 * First item in chunk of DMA memory: 32-slot command table, 2411 * 32 bytes each in size 2412 */ 2413 pp->cmd_slot = mem; 2414 pp->cmd_slot_dma = mem_dma; 2415 2416 mem += AHCI_CMD_SLOT_SZ; 2417 mem_dma += AHCI_CMD_SLOT_SZ; 2418 2419 /* 2420 * Second item: Received-FIS area 2421 */ 2422 pp->rx_fis = mem; 2423 pp->rx_fis_dma = mem_dma; 2424 2425 mem += rx_fis_sz; 2426 mem_dma += rx_fis_sz; 2427 2428 /* 2429 * Third item: data area for storing a single command 2430 * and its scatter-gather table 2431 */ 2432 pp->cmd_tbl = mem; 2433 pp->cmd_tbl_dma = mem_dma; 2434 2435 /* 2436 * Save off initial list of interrupts to be enabled. 2437 * This could be changed later 2438 */ 2439 pp->intr_mask = DEF_PORT_IRQ; 2440 2441 /* 2442 * Switch to per-port locking in case each port has its own MSI vector. 2443 */ 2444 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { 2445 spin_lock_init(&pp->lock); 2446 ap->lock = &pp->lock; 2447 } 2448 2449 ap->private_data = pp; 2450 2451 /* engage engines, captain */ 2452 return ahci_port_resume(ap); 2453 } 2454 2455 static void ahci_port_stop(struct ata_port *ap) 2456 { 2457 const char *emsg = NULL; 2458 struct ahci_host_priv *hpriv = ap->host->private_data; 2459 void __iomem *host_mmio = hpriv->mmio; 2460 int rc; 2461 2462 /* de-initialize port */ 2463 rc = ahci_deinit_port(ap, &emsg); 2464 if (rc) 2465 ata_port_warn(ap, "%s (%d)\n", emsg, rc); 2466 2467 /* 2468 * Clear GHC.IS to prevent stuck INTx after disabling MSI and 2469 * re-enabling INTx. 2470 */ 2471 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT); 2472 2473 ahci_rpm_put_port(ap); 2474 } 2475 2476 void ahci_print_info(struct ata_host *host, const char *scc_s) 2477 { 2478 struct ahci_host_priv *hpriv = host->private_data; 2479 u32 vers, cap, cap2, impl, speed; 2480 const char *speed_s; 2481 2482 vers = hpriv->version; 2483 cap = hpriv->cap; 2484 cap2 = hpriv->cap2; 2485 impl = hpriv->port_map; 2486 2487 speed = (cap >> 20) & 0xf; 2488 if (speed == 1) 2489 speed_s = "1.5"; 2490 else if (speed == 2) 2491 speed_s = "3"; 2492 else if (speed == 3) 2493 speed_s = "6"; 2494 else 2495 speed_s = "?"; 2496 2497 dev_info(host->dev, 2498 "AHCI %02x%02x.%02x%02x " 2499 "%u slots %u ports %s Gbps 0x%x impl %s mode\n" 2500 , 2501 2502 (vers >> 24) & 0xff, 2503 (vers >> 16) & 0xff, 2504 (vers >> 8) & 0xff, 2505 vers & 0xff, 2506 2507 ((cap >> 8) & 0x1f) + 1, 2508 (cap & 0x1f) + 1, 2509 speed_s, 2510 impl, 2511 scc_s); 2512 2513 dev_info(host->dev, 2514 "flags: " 2515 "%s%s%s%s%s%s%s" 2516 "%s%s%s%s%s%s%s" 2517 "%s%s%s%s%s%s%s" 2518 "%s%s\n" 2519 , 2520 2521 cap & HOST_CAP_64 ? "64bit " : "", 2522 cap & HOST_CAP_NCQ ? "ncq " : "", 2523 cap & HOST_CAP_SNTF ? "sntf " : "", 2524 cap & HOST_CAP_MPS ? "ilck " : "", 2525 cap & HOST_CAP_SSS ? "stag " : "", 2526 cap & HOST_CAP_ALPM ? "pm " : "", 2527 cap & HOST_CAP_LED ? "led " : "", 2528 cap & HOST_CAP_CLO ? "clo " : "", 2529 cap & HOST_CAP_ONLY ? "only " : "", 2530 cap & HOST_CAP_PMP ? "pmp " : "", 2531 cap & HOST_CAP_FBS ? "fbs " : "", 2532 cap & HOST_CAP_PIO_MULTI ? "pio " : "", 2533 cap & HOST_CAP_SSC ? "slum " : "", 2534 cap & HOST_CAP_PART ? "part " : "", 2535 cap & HOST_CAP_CCC ? "ccc " : "", 2536 cap & HOST_CAP_EMS ? "ems " : "", 2537 cap & HOST_CAP_SXS ? "sxs " : "", 2538 cap2 & HOST_CAP2_DESO ? "deso " : "", 2539 cap2 & HOST_CAP2_SADM ? "sadm " : "", 2540 cap2 & HOST_CAP2_SDS ? "sds " : "", 2541 cap2 & HOST_CAP2_APST ? "apst " : "", 2542 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "", 2543 cap2 & HOST_CAP2_BOH ? "boh " : "" 2544 ); 2545 } 2546 EXPORT_SYMBOL_GPL(ahci_print_info); 2547 2548 void ahci_set_em_messages(struct ahci_host_priv *hpriv, 2549 struct ata_port_info *pi) 2550 { 2551 u8 messages; 2552 void __iomem *mmio = hpriv->mmio; 2553 u32 em_loc = readl(mmio + HOST_EM_LOC); 2554 u32 em_ctl = readl(mmio + HOST_EM_CTL); 2555 2556 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS)) 2557 return; 2558 2559 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16; 2560 2561 if (messages) { 2562 /* store em_loc */ 2563 hpriv->em_loc = ((em_loc >> 16) * 4); 2564 hpriv->em_buf_sz = ((em_loc & 0xff) * 4); 2565 hpriv->em_msg_type = messages; 2566 pi->flags |= ATA_FLAG_EM; 2567 if (!(em_ctl & EM_CTL_ALHD)) 2568 pi->flags |= ATA_FLAG_SW_ACTIVITY; 2569 } 2570 } 2571 EXPORT_SYMBOL_GPL(ahci_set_em_messages); 2572 2573 static int ahci_host_activate_multi_irqs(struct ata_host *host, 2574 struct scsi_host_template *sht) 2575 { 2576 struct ahci_host_priv *hpriv = host->private_data; 2577 int i, rc; 2578 2579 rc = ata_host_start(host); 2580 if (rc) 2581 return rc; 2582 /* 2583 * Requests IRQs according to AHCI-1.1 when multiple MSIs were 2584 * allocated. That is one MSI per port, starting from @irq. 2585 */ 2586 for (i = 0; i < host->n_ports; i++) { 2587 struct ahci_port_priv *pp = host->ports[i]->private_data; 2588 int irq = hpriv->get_irq_vector(host, i); 2589 2590 /* Do not receive interrupts sent by dummy ports */ 2591 if (!pp) { 2592 disable_irq(irq); 2593 continue; 2594 } 2595 2596 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard, 2597 0, pp->irq_desc, host->ports[i]); 2598 2599 if (rc) 2600 return rc; 2601 ata_port_desc(host->ports[i], "irq %d", irq); 2602 } 2603 2604 return ata_host_register(host, sht); 2605 } 2606 2607 /** 2608 * ahci_host_activate - start AHCI host, request IRQs and register it 2609 * @host: target ATA host 2610 * @sht: scsi_host_template to use when registering the host 2611 * 2612 * LOCKING: 2613 * Inherited from calling layer (may sleep). 2614 * 2615 * RETURNS: 2616 * 0 on success, -errno otherwise. 2617 */ 2618 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht) 2619 { 2620 struct ahci_host_priv *hpriv = host->private_data; 2621 int irq = hpriv->irq; 2622 int rc; 2623 2624 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { 2625 if (hpriv->irq_handler && 2626 hpriv->irq_handler != ahci_single_level_irq_intr) 2627 dev_warn(host->dev, 2628 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n"); 2629 if (!hpriv->get_irq_vector) { 2630 dev_err(host->dev, 2631 "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n"); 2632 return -EIO; 2633 } 2634 2635 rc = ahci_host_activate_multi_irqs(host, sht); 2636 } else { 2637 rc = ata_host_activate(host, irq, hpriv->irq_handler, 2638 IRQF_SHARED, sht); 2639 } 2640 2641 2642 return rc; 2643 } 2644 EXPORT_SYMBOL_GPL(ahci_host_activate); 2645 2646 MODULE_AUTHOR("Jeff Garzik"); 2647 MODULE_DESCRIPTION("Common AHCI SATA low-level routines"); 2648 MODULE_LICENSE("GPL"); 2649