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 dev_dbg(dev, "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 dev_dbg(dev, "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 dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp); 1274 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); 1275 tmp = readl(mmio + HOST_CTL); 1276 dev_dbg(host->dev, "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_port_classify(ap, &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 /* prepare for SRST (AHCI-1.1 10.4.1) */ 1419 rc = ahci_kick_engine(ap); 1420 if (rc && rc != -EOPNOTSUPP) 1421 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc); 1422 1423 /* 1424 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall 1425 * clear PxFBS.EN to '0' prior to issuing software reset to devices 1426 * that is attached to port multiplier. 1427 */ 1428 if (!ata_is_host_link(link) && pp->fbs_enabled) { 1429 ahci_disable_fbs(ap); 1430 fbs_disabled = true; 1431 } 1432 1433 ata_tf_init(link->device, &tf); 1434 1435 /* issue the first H2D Register FIS */ 1436 msecs = 0; 1437 now = jiffies; 1438 if (time_after(deadline, now)) 1439 msecs = jiffies_to_msecs(deadline - now); 1440 1441 tf.ctl |= ATA_SRST; 1442 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0, 1443 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) { 1444 rc = -EIO; 1445 reason = "1st FIS failed"; 1446 goto fail; 1447 } 1448 1449 /* spec says at least 5us, but be generous and sleep for 1ms */ 1450 ata_msleep(ap, 1); 1451 1452 /* issue the second H2D Register FIS */ 1453 tf.ctl &= ~ATA_SRST; 1454 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0); 1455 1456 /* wait for link to become ready */ 1457 rc = ata_wait_after_reset(link, deadline, check_ready); 1458 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) { 1459 /* 1460 * Workaround for cases where link online status can't 1461 * be trusted. Treat device readiness timeout as link 1462 * offline. 1463 */ 1464 ata_link_info(link, "device not ready, treating as offline\n"); 1465 *class = ATA_DEV_NONE; 1466 } else if (rc) { 1467 /* link occupied, -ENODEV too is an error */ 1468 reason = "device not ready"; 1469 goto fail; 1470 } else 1471 *class = ahci_dev_classify(ap); 1472 1473 /* re-enable FBS if disabled before */ 1474 if (fbs_disabled) 1475 ahci_enable_fbs(ap); 1476 1477 return 0; 1478 1479 fail: 1480 ata_link_err(link, "softreset failed (%s)\n", reason); 1481 return rc; 1482 } 1483 1484 int ahci_check_ready(struct ata_link *link) 1485 { 1486 void __iomem *port_mmio = ahci_port_base(link->ap); 1487 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1488 1489 return ata_check_ready(status); 1490 } 1491 EXPORT_SYMBOL_GPL(ahci_check_ready); 1492 1493 static int ahci_softreset(struct ata_link *link, unsigned int *class, 1494 unsigned long deadline) 1495 { 1496 int pmp = sata_srst_pmp(link); 1497 1498 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready); 1499 } 1500 EXPORT_SYMBOL_GPL(ahci_do_softreset); 1501 1502 static int ahci_bad_pmp_check_ready(struct ata_link *link) 1503 { 1504 void __iomem *port_mmio = ahci_port_base(link->ap); 1505 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1506 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT); 1507 1508 /* 1509 * There is no need to check TFDATA if BAD PMP is found due to HW bug, 1510 * which can save timeout delay. 1511 */ 1512 if (irq_status & PORT_IRQ_BAD_PMP) 1513 return -EIO; 1514 1515 return ata_check_ready(status); 1516 } 1517 1518 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, 1519 unsigned long deadline) 1520 { 1521 struct ata_port *ap = link->ap; 1522 void __iomem *port_mmio = ahci_port_base(ap); 1523 int pmp = sata_srst_pmp(link); 1524 int rc; 1525 u32 irq_sts; 1526 1527 rc = ahci_do_softreset(link, class, pmp, deadline, 1528 ahci_bad_pmp_check_ready); 1529 1530 /* 1531 * Soft reset fails with IPMS set when PMP is enabled but 1532 * SATA HDD/ODD is connected to SATA port, do soft reset 1533 * again to port 0. 1534 */ 1535 if (rc == -EIO) { 1536 irq_sts = readl(port_mmio + PORT_IRQ_STAT); 1537 if (irq_sts & PORT_IRQ_BAD_PMP) { 1538 ata_link_warn(link, 1539 "applying PMP SRST workaround " 1540 "and retrying\n"); 1541 rc = ahci_do_softreset(link, class, 0, deadline, 1542 ahci_check_ready); 1543 } 1544 } 1545 1546 return rc; 1547 } 1548 1549 int ahci_do_hardreset(struct ata_link *link, unsigned int *class, 1550 unsigned long deadline, bool *online) 1551 { 1552 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 1553 struct ata_port *ap = link->ap; 1554 struct ahci_port_priv *pp = ap->private_data; 1555 struct ahci_host_priv *hpriv = ap->host->private_data; 1556 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; 1557 struct ata_taskfile tf; 1558 int rc; 1559 1560 hpriv->stop_engine(ap); 1561 1562 /* clear D2H reception area to properly wait for D2H FIS */ 1563 ata_tf_init(link->device, &tf); 1564 tf.command = ATA_BUSY; 1565 ata_tf_to_fis(&tf, 0, 0, d2h_fis); 1566 1567 rc = sata_link_hardreset(link, timing, deadline, online, 1568 ahci_check_ready); 1569 1570 hpriv->start_engine(ap); 1571 1572 if (*online) 1573 *class = ahci_dev_classify(ap); 1574 1575 return rc; 1576 } 1577 EXPORT_SYMBOL_GPL(ahci_do_hardreset); 1578 1579 static int ahci_hardreset(struct ata_link *link, unsigned int *class, 1580 unsigned long deadline) 1581 { 1582 bool online; 1583 1584 return ahci_do_hardreset(link, class, deadline, &online); 1585 } 1586 1587 static void ahci_postreset(struct ata_link *link, unsigned int *class) 1588 { 1589 struct ata_port *ap = link->ap; 1590 void __iomem *port_mmio = ahci_port_base(ap); 1591 u32 new_tmp, tmp; 1592 1593 ata_std_postreset(link, class); 1594 1595 /* Make sure port's ATAPI bit is set appropriately */ 1596 new_tmp = tmp = readl(port_mmio + PORT_CMD); 1597 if (*class == ATA_DEV_ATAPI) 1598 new_tmp |= PORT_CMD_ATAPI; 1599 else 1600 new_tmp &= ~PORT_CMD_ATAPI; 1601 if (new_tmp != tmp) { 1602 writel(new_tmp, port_mmio + PORT_CMD); 1603 readl(port_mmio + PORT_CMD); /* flush */ 1604 } 1605 } 1606 1607 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) 1608 { 1609 struct scatterlist *sg; 1610 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; 1611 unsigned int si; 1612 1613 /* 1614 * Next, the S/G list. 1615 */ 1616 for_each_sg(qc->sg, sg, qc->n_elem, si) { 1617 dma_addr_t addr = sg_dma_address(sg); 1618 u32 sg_len = sg_dma_len(sg); 1619 1620 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff); 1621 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16); 1622 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1); 1623 } 1624 1625 return si; 1626 } 1627 1628 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc) 1629 { 1630 struct ata_port *ap = qc->ap; 1631 struct ahci_port_priv *pp = ap->private_data; 1632 1633 if (!sata_pmp_attached(ap) || pp->fbs_enabled) 1634 return ata_std_qc_defer(qc); 1635 else 1636 return sata_pmp_qc_defer_cmd_switch(qc); 1637 } 1638 1639 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc) 1640 { 1641 struct ata_port *ap = qc->ap; 1642 struct ahci_port_priv *pp = ap->private_data; 1643 int is_atapi = ata_is_atapi(qc->tf.protocol); 1644 void *cmd_tbl; 1645 u32 opts; 1646 const u32 cmd_fis_len = 5; /* five dwords */ 1647 unsigned int n_elem; 1648 1649 /* 1650 * Fill in command table information. First, the header, 1651 * a SATA Register - Host to Device command FIS. 1652 */ 1653 cmd_tbl = pp->cmd_tbl + qc->hw_tag * AHCI_CMD_TBL_SZ; 1654 1655 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl); 1656 if (is_atapi) { 1657 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); 1658 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); 1659 } 1660 1661 n_elem = 0; 1662 if (qc->flags & ATA_QCFLAG_DMAMAP) 1663 n_elem = ahci_fill_sg(qc, cmd_tbl); 1664 1665 /* 1666 * Fill in command slot information. 1667 */ 1668 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12); 1669 if (qc->tf.flags & ATA_TFLAG_WRITE) 1670 opts |= AHCI_CMD_WRITE; 1671 if (is_atapi) 1672 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; 1673 1674 ahci_fill_cmd_slot(pp, qc->hw_tag, opts); 1675 1676 return AC_ERR_OK; 1677 } 1678 1679 static void ahci_fbs_dec_intr(struct ata_port *ap) 1680 { 1681 struct ahci_port_priv *pp = ap->private_data; 1682 void __iomem *port_mmio = ahci_port_base(ap); 1683 u32 fbs = readl(port_mmio + PORT_FBS); 1684 int retries = 3; 1685 1686 BUG_ON(!pp->fbs_enabled); 1687 1688 /* time to wait for DEC is not specified by AHCI spec, 1689 * add a retry loop for safety. 1690 */ 1691 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS); 1692 fbs = readl(port_mmio + PORT_FBS); 1693 while ((fbs & PORT_FBS_DEC) && retries--) { 1694 udelay(1); 1695 fbs = readl(port_mmio + PORT_FBS); 1696 } 1697 1698 if (fbs & PORT_FBS_DEC) 1699 dev_err(ap->host->dev, "failed to clear device error\n"); 1700 } 1701 1702 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) 1703 { 1704 struct ahci_host_priv *hpriv = ap->host->private_data; 1705 struct ahci_port_priv *pp = ap->private_data; 1706 struct ata_eh_info *host_ehi = &ap->link.eh_info; 1707 struct ata_link *link = NULL; 1708 struct ata_queued_cmd *active_qc; 1709 struct ata_eh_info *active_ehi; 1710 bool fbs_need_dec = false; 1711 u32 serror; 1712 1713 /* determine active link with error */ 1714 if (pp->fbs_enabled) { 1715 void __iomem *port_mmio = ahci_port_base(ap); 1716 u32 fbs = readl(port_mmio + PORT_FBS); 1717 int pmp = fbs >> PORT_FBS_DWE_OFFSET; 1718 1719 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) { 1720 link = &ap->pmp_link[pmp]; 1721 fbs_need_dec = true; 1722 } 1723 1724 } else 1725 ata_for_each_link(link, ap, EDGE) 1726 if (ata_link_active(link)) 1727 break; 1728 1729 if (!link) 1730 link = &ap->link; 1731 1732 active_qc = ata_qc_from_tag(ap, link->active_tag); 1733 active_ehi = &link->eh_info; 1734 1735 /* record irq stat */ 1736 ata_ehi_clear_desc(host_ehi); 1737 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); 1738 1739 /* AHCI needs SError cleared; otherwise, it might lock up */ 1740 ahci_scr_read(&ap->link, SCR_ERROR, &serror); 1741 ahci_scr_write(&ap->link, SCR_ERROR, serror); 1742 host_ehi->serror |= serror; 1743 1744 /* some controllers set IRQ_IF_ERR on device errors, ignore it */ 1745 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR) 1746 irq_stat &= ~PORT_IRQ_IF_ERR; 1747 1748 if (irq_stat & PORT_IRQ_TF_ERR) { 1749 /* If qc is active, charge it; otherwise, the active 1750 * link. There's no active qc on NCQ errors. It will 1751 * be determined by EH by reading log page 10h. 1752 */ 1753 if (active_qc) 1754 active_qc->err_mask |= AC_ERR_DEV; 1755 else 1756 active_ehi->err_mask |= AC_ERR_DEV; 1757 1758 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL) 1759 host_ehi->serror &= ~SERR_INTERNAL; 1760 } 1761 1762 if (irq_stat & PORT_IRQ_UNK_FIS) { 1763 u32 *unk = pp->rx_fis + RX_FIS_UNK; 1764 1765 active_ehi->err_mask |= AC_ERR_HSM; 1766 active_ehi->action |= ATA_EH_RESET; 1767 ata_ehi_push_desc(active_ehi, 1768 "unknown FIS %08x %08x %08x %08x" , 1769 unk[0], unk[1], unk[2], unk[3]); 1770 } 1771 1772 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) { 1773 active_ehi->err_mask |= AC_ERR_HSM; 1774 active_ehi->action |= ATA_EH_RESET; 1775 ata_ehi_push_desc(active_ehi, "incorrect PMP"); 1776 } 1777 1778 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { 1779 host_ehi->err_mask |= AC_ERR_HOST_BUS; 1780 host_ehi->action |= ATA_EH_RESET; 1781 ata_ehi_push_desc(host_ehi, "host bus error"); 1782 } 1783 1784 if (irq_stat & PORT_IRQ_IF_ERR) { 1785 if (fbs_need_dec) 1786 active_ehi->err_mask |= AC_ERR_DEV; 1787 else { 1788 host_ehi->err_mask |= AC_ERR_ATA_BUS; 1789 host_ehi->action |= ATA_EH_RESET; 1790 } 1791 1792 ata_ehi_push_desc(host_ehi, "interface fatal error"); 1793 } 1794 1795 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { 1796 ata_ehi_hotplugged(host_ehi); 1797 ata_ehi_push_desc(host_ehi, "%s", 1798 irq_stat & PORT_IRQ_CONNECT ? 1799 "connection status changed" : "PHY RDY changed"); 1800 } 1801 1802 /* okay, let's hand over to EH */ 1803 1804 if (irq_stat & PORT_IRQ_FREEZE) 1805 ata_port_freeze(ap); 1806 else if (fbs_need_dec) { 1807 ata_link_abort(link); 1808 ahci_fbs_dec_intr(ap); 1809 } else 1810 ata_port_abort(ap); 1811 } 1812 1813 static void ahci_handle_port_interrupt(struct ata_port *ap, 1814 void __iomem *port_mmio, u32 status) 1815 { 1816 struct ata_eh_info *ehi = &ap->link.eh_info; 1817 struct ahci_port_priv *pp = ap->private_data; 1818 struct ahci_host_priv *hpriv = ap->host->private_data; 1819 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING); 1820 u32 qc_active = 0; 1821 int rc; 1822 1823 /* ignore BAD_PMP while resetting */ 1824 if (unlikely(resetting)) 1825 status &= ~PORT_IRQ_BAD_PMP; 1826 1827 if (sata_lpm_ignore_phy_events(&ap->link)) { 1828 status &= ~PORT_IRQ_PHYRDY; 1829 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG); 1830 } 1831 1832 if (unlikely(status & PORT_IRQ_ERROR)) { 1833 ahci_error_intr(ap, status); 1834 return; 1835 } 1836 1837 if (status & PORT_IRQ_SDB_FIS) { 1838 /* If SNotification is available, leave notification 1839 * handling to sata_async_notification(). If not, 1840 * emulate it by snooping SDB FIS RX area. 1841 * 1842 * Snooping FIS RX area is probably cheaper than 1843 * poking SNotification but some constrollers which 1844 * implement SNotification, ICH9 for example, don't 1845 * store AN SDB FIS into receive area. 1846 */ 1847 if (hpriv->cap & HOST_CAP_SNTF) 1848 sata_async_notification(ap); 1849 else { 1850 /* If the 'N' bit in word 0 of the FIS is set, 1851 * we just received asynchronous notification. 1852 * Tell libata about it. 1853 * 1854 * Lack of SNotification should not appear in 1855 * ahci 1.2, so the workaround is unnecessary 1856 * when FBS is enabled. 1857 */ 1858 if (pp->fbs_enabled) 1859 WARN_ON_ONCE(1); 1860 else { 1861 const __le32 *f = pp->rx_fis + RX_FIS_SDB; 1862 u32 f0 = le32_to_cpu(f[0]); 1863 if (f0 & (1 << 15)) 1864 sata_async_notification(ap); 1865 } 1866 } 1867 } 1868 1869 /* pp->active_link is not reliable once FBS is enabled, both 1870 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because 1871 * NCQ and non-NCQ commands may be in flight at the same time. 1872 */ 1873 if (pp->fbs_enabled) { 1874 if (ap->qc_active) { 1875 qc_active = readl(port_mmio + PORT_SCR_ACT); 1876 qc_active |= readl(port_mmio + PORT_CMD_ISSUE); 1877 } 1878 } else { 1879 /* pp->active_link is valid iff any command is in flight */ 1880 if (ap->qc_active && pp->active_link->sactive) 1881 qc_active = readl(port_mmio + PORT_SCR_ACT); 1882 else 1883 qc_active = readl(port_mmio + PORT_CMD_ISSUE); 1884 } 1885 1886 1887 rc = ata_qc_complete_multiple(ap, qc_active); 1888 1889 /* while resetting, invalid completions are expected */ 1890 if (unlikely(rc < 0 && !resetting)) { 1891 ehi->err_mask |= AC_ERR_HSM; 1892 ehi->action |= ATA_EH_RESET; 1893 ata_port_freeze(ap); 1894 } 1895 } 1896 1897 static void ahci_port_intr(struct ata_port *ap) 1898 { 1899 void __iomem *port_mmio = ahci_port_base(ap); 1900 u32 status; 1901 1902 status = readl(port_mmio + PORT_IRQ_STAT); 1903 writel(status, port_mmio + PORT_IRQ_STAT); 1904 1905 ahci_handle_port_interrupt(ap, port_mmio, status); 1906 } 1907 1908 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance) 1909 { 1910 struct ata_port *ap = dev_instance; 1911 void __iomem *port_mmio = ahci_port_base(ap); 1912 u32 status; 1913 1914 status = readl(port_mmio + PORT_IRQ_STAT); 1915 writel(status, port_mmio + PORT_IRQ_STAT); 1916 1917 spin_lock(ap->lock); 1918 ahci_handle_port_interrupt(ap, port_mmio, status); 1919 spin_unlock(ap->lock); 1920 1921 return IRQ_HANDLED; 1922 } 1923 1924 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked) 1925 { 1926 unsigned int i, handled = 0; 1927 1928 for (i = 0; i < host->n_ports; i++) { 1929 struct ata_port *ap; 1930 1931 if (!(irq_masked & (1 << i))) 1932 continue; 1933 1934 ap = host->ports[i]; 1935 if (ap) { 1936 ahci_port_intr(ap); 1937 } else { 1938 if (ata_ratelimit()) 1939 dev_warn(host->dev, 1940 "interrupt on disabled port %u\n", i); 1941 } 1942 1943 handled = 1; 1944 } 1945 1946 return handled; 1947 } 1948 EXPORT_SYMBOL_GPL(ahci_handle_port_intr); 1949 1950 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance) 1951 { 1952 struct ata_host *host = dev_instance; 1953 struct ahci_host_priv *hpriv; 1954 unsigned int rc = 0; 1955 void __iomem *mmio; 1956 u32 irq_stat, irq_masked; 1957 1958 hpriv = host->private_data; 1959 mmio = hpriv->mmio; 1960 1961 /* sigh. 0xffffffff is a valid return from h/w */ 1962 irq_stat = readl(mmio + HOST_IRQ_STAT); 1963 if (!irq_stat) 1964 return IRQ_NONE; 1965 1966 irq_masked = irq_stat & hpriv->port_map; 1967 1968 spin_lock(&host->lock); 1969 1970 rc = ahci_handle_port_intr(host, irq_masked); 1971 1972 /* HOST_IRQ_STAT behaves as level triggered latch meaning that 1973 * it should be cleared after all the port events are cleared; 1974 * otherwise, it will raise a spurious interrupt after each 1975 * valid one. Please read section 10.6.2 of ahci 1.1 for more 1976 * information. 1977 * 1978 * Also, use the unmasked value to clear interrupt as spurious 1979 * pending event on a dummy port might cause screaming IRQ. 1980 */ 1981 writel(irq_stat, mmio + HOST_IRQ_STAT); 1982 1983 spin_unlock(&host->lock); 1984 1985 return IRQ_RETVAL(rc); 1986 } 1987 1988 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) 1989 { 1990 struct ata_port *ap = qc->ap; 1991 void __iomem *port_mmio = ahci_port_base(ap); 1992 struct ahci_port_priv *pp = ap->private_data; 1993 1994 /* Keep track of the currently active link. It will be used 1995 * in completion path to determine whether NCQ phase is in 1996 * progress. 1997 */ 1998 pp->active_link = qc->dev->link; 1999 2000 if (ata_is_ncq(qc->tf.protocol)) 2001 writel(1 << qc->hw_tag, port_mmio + PORT_SCR_ACT); 2002 2003 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) { 2004 u32 fbs = readl(port_mmio + PORT_FBS); 2005 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); 2006 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET; 2007 writel(fbs, port_mmio + PORT_FBS); 2008 pp->fbs_last_dev = qc->dev->link->pmp; 2009 } 2010 2011 writel(1 << qc->hw_tag, port_mmio + PORT_CMD_ISSUE); 2012 2013 ahci_sw_activity(qc->dev->link); 2014 2015 return 0; 2016 } 2017 EXPORT_SYMBOL_GPL(ahci_qc_issue); 2018 2019 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc) 2020 { 2021 struct ahci_port_priv *pp = qc->ap->private_data; 2022 u8 *rx_fis = pp->rx_fis; 2023 2024 if (pp->fbs_enabled) 2025 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; 2026 2027 /* 2028 * After a successful execution of an ATA PIO data-in command, 2029 * the device doesn't send D2H Reg FIS to update the TF and 2030 * the host should take TF and E_Status from the preceding PIO 2031 * Setup FIS. 2032 */ 2033 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE && 2034 !(qc->flags & ATA_QCFLAG_FAILED)) { 2035 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf); 2036 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15]; 2037 } else 2038 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf); 2039 2040 return true; 2041 } 2042 2043 static void ahci_freeze(struct ata_port *ap) 2044 { 2045 void __iomem *port_mmio = ahci_port_base(ap); 2046 2047 /* turn IRQ off */ 2048 writel(0, port_mmio + PORT_IRQ_MASK); 2049 } 2050 2051 static void ahci_thaw(struct ata_port *ap) 2052 { 2053 struct ahci_host_priv *hpriv = ap->host->private_data; 2054 void __iomem *mmio = hpriv->mmio; 2055 void __iomem *port_mmio = ahci_port_base(ap); 2056 u32 tmp; 2057 struct ahci_port_priv *pp = ap->private_data; 2058 2059 /* clear IRQ */ 2060 tmp = readl(port_mmio + PORT_IRQ_STAT); 2061 writel(tmp, port_mmio + PORT_IRQ_STAT); 2062 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT); 2063 2064 /* turn IRQ back on */ 2065 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2066 } 2067 2068 void ahci_error_handler(struct ata_port *ap) 2069 { 2070 struct ahci_host_priv *hpriv = ap->host->private_data; 2071 2072 if (!(ap->pflags & ATA_PFLAG_FROZEN)) { 2073 /* restart engine */ 2074 hpriv->stop_engine(ap); 2075 hpriv->start_engine(ap); 2076 } 2077 2078 sata_pmp_error_handler(ap); 2079 2080 if (!ata_dev_enabled(ap->link.device)) 2081 hpriv->stop_engine(ap); 2082 } 2083 EXPORT_SYMBOL_GPL(ahci_error_handler); 2084 2085 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) 2086 { 2087 struct ata_port *ap = qc->ap; 2088 2089 /* make DMA engine forget about the failed command */ 2090 if (qc->flags & ATA_QCFLAG_FAILED) 2091 ahci_kick_engine(ap); 2092 } 2093 2094 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep) 2095 { 2096 struct ahci_host_priv *hpriv = ap->host->private_data; 2097 void __iomem *port_mmio = ahci_port_base(ap); 2098 struct ata_device *dev = ap->link.device; 2099 u32 devslp, dm, dito, mdat, deto, dito_conf; 2100 int rc; 2101 unsigned int err_mask; 2102 2103 devslp = readl(port_mmio + PORT_DEVSLP); 2104 if (!(devslp & PORT_DEVSLP_DSP)) { 2105 dev_info(ap->host->dev, "port does not support device sleep\n"); 2106 return; 2107 } 2108 2109 /* disable device sleep */ 2110 if (!sleep) { 2111 if (devslp & PORT_DEVSLP_ADSE) { 2112 writel(devslp & ~PORT_DEVSLP_ADSE, 2113 port_mmio + PORT_DEVSLP); 2114 err_mask = ata_dev_set_feature(dev, 2115 SETFEATURES_SATA_DISABLE, 2116 SATA_DEVSLP); 2117 if (err_mask && err_mask != AC_ERR_DEV) 2118 ata_dev_warn(dev, "failed to disable DEVSLP\n"); 2119 } 2120 return; 2121 } 2122 2123 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET; 2124 dito = devslp_idle_timeout / (dm + 1); 2125 if (dito > 0x3ff) 2126 dito = 0x3ff; 2127 2128 dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF; 2129 2130 /* device sleep was already enabled and same dito */ 2131 if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito)) 2132 return; 2133 2134 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */ 2135 rc = hpriv->stop_engine(ap); 2136 if (rc) 2137 return; 2138 2139 /* Use the nominal value 10 ms if the read MDAT is zero, 2140 * the nominal value of DETO is 20 ms. 2141 */ 2142 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] & 2143 ATA_LOG_DEVSLP_VALID_MASK) { 2144 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] & 2145 ATA_LOG_DEVSLP_MDAT_MASK; 2146 if (!mdat) 2147 mdat = 10; 2148 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO]; 2149 if (!deto) 2150 deto = 20; 2151 } else { 2152 mdat = 10; 2153 deto = 20; 2154 } 2155 2156 /* Make dito, mdat, deto bits to 0s */ 2157 devslp &= ~GENMASK_ULL(24, 2); 2158 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) | 2159 (mdat << PORT_DEVSLP_MDAT_OFFSET) | 2160 (deto << PORT_DEVSLP_DETO_OFFSET) | 2161 PORT_DEVSLP_ADSE); 2162 writel(devslp, port_mmio + PORT_DEVSLP); 2163 2164 hpriv->start_engine(ap); 2165 2166 /* enable device sleep feature for the drive */ 2167 err_mask = ata_dev_set_feature(dev, 2168 SETFEATURES_SATA_ENABLE, 2169 SATA_DEVSLP); 2170 if (err_mask && err_mask != AC_ERR_DEV) 2171 ata_dev_warn(dev, "failed to enable DEVSLP\n"); 2172 } 2173 2174 static void ahci_enable_fbs(struct ata_port *ap) 2175 { 2176 struct ahci_host_priv *hpriv = ap->host->private_data; 2177 struct ahci_port_priv *pp = ap->private_data; 2178 void __iomem *port_mmio = ahci_port_base(ap); 2179 u32 fbs; 2180 int rc; 2181 2182 if (!pp->fbs_supported) 2183 return; 2184 2185 fbs = readl(port_mmio + PORT_FBS); 2186 if (fbs & PORT_FBS_EN) { 2187 pp->fbs_enabled = true; 2188 pp->fbs_last_dev = -1; /* initialization */ 2189 return; 2190 } 2191 2192 rc = hpriv->stop_engine(ap); 2193 if (rc) 2194 return; 2195 2196 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS); 2197 fbs = readl(port_mmio + PORT_FBS); 2198 if (fbs & PORT_FBS_EN) { 2199 dev_info(ap->host->dev, "FBS is enabled\n"); 2200 pp->fbs_enabled = true; 2201 pp->fbs_last_dev = -1; /* initialization */ 2202 } else 2203 dev_err(ap->host->dev, "Failed to enable FBS\n"); 2204 2205 hpriv->start_engine(ap); 2206 } 2207 2208 static void ahci_disable_fbs(struct ata_port *ap) 2209 { 2210 struct ahci_host_priv *hpriv = ap->host->private_data; 2211 struct ahci_port_priv *pp = ap->private_data; 2212 void __iomem *port_mmio = ahci_port_base(ap); 2213 u32 fbs; 2214 int rc; 2215 2216 if (!pp->fbs_supported) 2217 return; 2218 2219 fbs = readl(port_mmio + PORT_FBS); 2220 if ((fbs & PORT_FBS_EN) == 0) { 2221 pp->fbs_enabled = false; 2222 return; 2223 } 2224 2225 rc = hpriv->stop_engine(ap); 2226 if (rc) 2227 return; 2228 2229 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS); 2230 fbs = readl(port_mmio + PORT_FBS); 2231 if (fbs & PORT_FBS_EN) 2232 dev_err(ap->host->dev, "Failed to disable FBS\n"); 2233 else { 2234 dev_info(ap->host->dev, "FBS is disabled\n"); 2235 pp->fbs_enabled = false; 2236 } 2237 2238 hpriv->start_engine(ap); 2239 } 2240 2241 static void ahci_pmp_attach(struct ata_port *ap) 2242 { 2243 void __iomem *port_mmio = ahci_port_base(ap); 2244 struct ahci_port_priv *pp = ap->private_data; 2245 u32 cmd; 2246 2247 cmd = readl(port_mmio + PORT_CMD); 2248 cmd |= PORT_CMD_PMP; 2249 writel(cmd, port_mmio + PORT_CMD); 2250 2251 ahci_enable_fbs(ap); 2252 2253 pp->intr_mask |= PORT_IRQ_BAD_PMP; 2254 2255 /* 2256 * We must not change the port interrupt mask register if the 2257 * port is marked frozen, the value in pp->intr_mask will be 2258 * restored later when the port is thawed. 2259 * 2260 * Note that during initialization, the port is marked as 2261 * frozen since the irq handler is not yet registered. 2262 */ 2263 if (!(ap->pflags & ATA_PFLAG_FROZEN)) 2264 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2265 } 2266 2267 static void ahci_pmp_detach(struct ata_port *ap) 2268 { 2269 void __iomem *port_mmio = ahci_port_base(ap); 2270 struct ahci_port_priv *pp = ap->private_data; 2271 u32 cmd; 2272 2273 ahci_disable_fbs(ap); 2274 2275 cmd = readl(port_mmio + PORT_CMD); 2276 cmd &= ~PORT_CMD_PMP; 2277 writel(cmd, port_mmio + PORT_CMD); 2278 2279 pp->intr_mask &= ~PORT_IRQ_BAD_PMP; 2280 2281 /* see comment above in ahci_pmp_attach() */ 2282 if (!(ap->pflags & ATA_PFLAG_FROZEN)) 2283 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2284 } 2285 2286 int ahci_port_resume(struct ata_port *ap) 2287 { 2288 ahci_rpm_get_port(ap); 2289 2290 ahci_power_up(ap); 2291 ahci_start_port(ap); 2292 2293 if (sata_pmp_attached(ap)) 2294 ahci_pmp_attach(ap); 2295 else 2296 ahci_pmp_detach(ap); 2297 2298 return 0; 2299 } 2300 EXPORT_SYMBOL_GPL(ahci_port_resume); 2301 2302 #ifdef CONFIG_PM 2303 static void ahci_handle_s2idle(struct ata_port *ap) 2304 { 2305 void __iomem *port_mmio = ahci_port_base(ap); 2306 u32 devslp; 2307 2308 if (pm_suspend_via_firmware()) 2309 return; 2310 devslp = readl(port_mmio + PORT_DEVSLP); 2311 if ((devslp & PORT_DEVSLP_ADSE)) 2312 ata_msleep(ap, devslp_idle_timeout); 2313 } 2314 2315 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) 2316 { 2317 const char *emsg = NULL; 2318 int rc; 2319 2320 rc = ahci_deinit_port(ap, &emsg); 2321 if (rc == 0) 2322 ahci_power_down(ap); 2323 else { 2324 ata_port_err(ap, "%s (%d)\n", emsg, rc); 2325 ata_port_freeze(ap); 2326 } 2327 2328 if (acpi_storage_d3(ap->host->dev)) 2329 ahci_handle_s2idle(ap); 2330 2331 ahci_rpm_put_port(ap); 2332 return rc; 2333 } 2334 #endif 2335 2336 static int ahci_port_start(struct ata_port *ap) 2337 { 2338 struct ahci_host_priv *hpriv = ap->host->private_data; 2339 struct device *dev = ap->host->dev; 2340 struct ahci_port_priv *pp; 2341 void *mem; 2342 dma_addr_t mem_dma; 2343 size_t dma_sz, rx_fis_sz; 2344 2345 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 2346 if (!pp) 2347 return -ENOMEM; 2348 2349 if (ap->host->n_ports > 1) { 2350 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL); 2351 if (!pp->irq_desc) { 2352 devm_kfree(dev, pp); 2353 return -ENOMEM; 2354 } 2355 snprintf(pp->irq_desc, 8, 2356 "%s%d", dev_driver_string(dev), ap->port_no); 2357 } 2358 2359 /* check FBS capability */ 2360 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) { 2361 void __iomem *port_mmio = ahci_port_base(ap); 2362 u32 cmd = readl(port_mmio + PORT_CMD); 2363 if (cmd & PORT_CMD_FBSCP) 2364 pp->fbs_supported = true; 2365 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) { 2366 dev_info(dev, "port %d can do FBS, forcing FBSCP\n", 2367 ap->port_no); 2368 pp->fbs_supported = true; 2369 } else 2370 dev_warn(dev, "port %d is not capable of FBS\n", 2371 ap->port_no); 2372 } 2373 2374 if (pp->fbs_supported) { 2375 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ; 2376 rx_fis_sz = AHCI_RX_FIS_SZ * 16; 2377 } else { 2378 dma_sz = AHCI_PORT_PRIV_DMA_SZ; 2379 rx_fis_sz = AHCI_RX_FIS_SZ; 2380 } 2381 2382 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL); 2383 if (!mem) 2384 return -ENOMEM; 2385 2386 /* 2387 * First item in chunk of DMA memory: 32-slot command table, 2388 * 32 bytes each in size 2389 */ 2390 pp->cmd_slot = mem; 2391 pp->cmd_slot_dma = mem_dma; 2392 2393 mem += AHCI_CMD_SLOT_SZ; 2394 mem_dma += AHCI_CMD_SLOT_SZ; 2395 2396 /* 2397 * Second item: Received-FIS area 2398 */ 2399 pp->rx_fis = mem; 2400 pp->rx_fis_dma = mem_dma; 2401 2402 mem += rx_fis_sz; 2403 mem_dma += rx_fis_sz; 2404 2405 /* 2406 * Third item: data area for storing a single command 2407 * and its scatter-gather table 2408 */ 2409 pp->cmd_tbl = mem; 2410 pp->cmd_tbl_dma = mem_dma; 2411 2412 /* 2413 * Save off initial list of interrupts to be enabled. 2414 * This could be changed later 2415 */ 2416 pp->intr_mask = DEF_PORT_IRQ; 2417 2418 /* 2419 * Switch to per-port locking in case each port has its own MSI vector. 2420 */ 2421 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { 2422 spin_lock_init(&pp->lock); 2423 ap->lock = &pp->lock; 2424 } 2425 2426 ap->private_data = pp; 2427 2428 /* engage engines, captain */ 2429 return ahci_port_resume(ap); 2430 } 2431 2432 static void ahci_port_stop(struct ata_port *ap) 2433 { 2434 const char *emsg = NULL; 2435 struct ahci_host_priv *hpriv = ap->host->private_data; 2436 void __iomem *host_mmio = hpriv->mmio; 2437 int rc; 2438 2439 /* de-initialize port */ 2440 rc = ahci_deinit_port(ap, &emsg); 2441 if (rc) 2442 ata_port_warn(ap, "%s (%d)\n", emsg, rc); 2443 2444 /* 2445 * Clear GHC.IS to prevent stuck INTx after disabling MSI and 2446 * re-enabling INTx. 2447 */ 2448 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT); 2449 2450 ahci_rpm_put_port(ap); 2451 } 2452 2453 void ahci_print_info(struct ata_host *host, const char *scc_s) 2454 { 2455 struct ahci_host_priv *hpriv = host->private_data; 2456 u32 vers, cap, cap2, impl, speed; 2457 const char *speed_s; 2458 2459 vers = hpriv->version; 2460 cap = hpriv->cap; 2461 cap2 = hpriv->cap2; 2462 impl = hpriv->port_map; 2463 2464 speed = (cap >> 20) & 0xf; 2465 if (speed == 1) 2466 speed_s = "1.5"; 2467 else if (speed == 2) 2468 speed_s = "3"; 2469 else if (speed == 3) 2470 speed_s = "6"; 2471 else 2472 speed_s = "?"; 2473 2474 dev_info(host->dev, 2475 "AHCI %02x%02x.%02x%02x " 2476 "%u slots %u ports %s Gbps 0x%x impl %s mode\n" 2477 , 2478 2479 (vers >> 24) & 0xff, 2480 (vers >> 16) & 0xff, 2481 (vers >> 8) & 0xff, 2482 vers & 0xff, 2483 2484 ((cap >> 8) & 0x1f) + 1, 2485 (cap & 0x1f) + 1, 2486 speed_s, 2487 impl, 2488 scc_s); 2489 2490 dev_info(host->dev, 2491 "flags: " 2492 "%s%s%s%s%s%s%s" 2493 "%s%s%s%s%s%s%s" 2494 "%s%s%s%s%s%s%s" 2495 "%s%s\n" 2496 , 2497 2498 cap & HOST_CAP_64 ? "64bit " : "", 2499 cap & HOST_CAP_NCQ ? "ncq " : "", 2500 cap & HOST_CAP_SNTF ? "sntf " : "", 2501 cap & HOST_CAP_MPS ? "ilck " : "", 2502 cap & HOST_CAP_SSS ? "stag " : "", 2503 cap & HOST_CAP_ALPM ? "pm " : "", 2504 cap & HOST_CAP_LED ? "led " : "", 2505 cap & HOST_CAP_CLO ? "clo " : "", 2506 cap & HOST_CAP_ONLY ? "only " : "", 2507 cap & HOST_CAP_PMP ? "pmp " : "", 2508 cap & HOST_CAP_FBS ? "fbs " : "", 2509 cap & HOST_CAP_PIO_MULTI ? "pio " : "", 2510 cap & HOST_CAP_SSC ? "slum " : "", 2511 cap & HOST_CAP_PART ? "part " : "", 2512 cap & HOST_CAP_CCC ? "ccc " : "", 2513 cap & HOST_CAP_EMS ? "ems " : "", 2514 cap & HOST_CAP_SXS ? "sxs " : "", 2515 cap2 & HOST_CAP2_DESO ? "deso " : "", 2516 cap2 & HOST_CAP2_SADM ? "sadm " : "", 2517 cap2 & HOST_CAP2_SDS ? "sds " : "", 2518 cap2 & HOST_CAP2_APST ? "apst " : "", 2519 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "", 2520 cap2 & HOST_CAP2_BOH ? "boh " : "" 2521 ); 2522 } 2523 EXPORT_SYMBOL_GPL(ahci_print_info); 2524 2525 void ahci_set_em_messages(struct ahci_host_priv *hpriv, 2526 struct ata_port_info *pi) 2527 { 2528 u8 messages; 2529 void __iomem *mmio = hpriv->mmio; 2530 u32 em_loc = readl(mmio + HOST_EM_LOC); 2531 u32 em_ctl = readl(mmio + HOST_EM_CTL); 2532 2533 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS)) 2534 return; 2535 2536 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16; 2537 2538 if (messages) { 2539 /* store em_loc */ 2540 hpriv->em_loc = ((em_loc >> 16) * 4); 2541 hpriv->em_buf_sz = ((em_loc & 0xff) * 4); 2542 hpriv->em_msg_type = messages; 2543 pi->flags |= ATA_FLAG_EM; 2544 if (!(em_ctl & EM_CTL_ALHD)) 2545 pi->flags |= ATA_FLAG_SW_ACTIVITY; 2546 } 2547 } 2548 EXPORT_SYMBOL_GPL(ahci_set_em_messages); 2549 2550 static int ahci_host_activate_multi_irqs(struct ata_host *host, 2551 struct scsi_host_template *sht) 2552 { 2553 struct ahci_host_priv *hpriv = host->private_data; 2554 int i, rc; 2555 2556 rc = ata_host_start(host); 2557 if (rc) 2558 return rc; 2559 /* 2560 * Requests IRQs according to AHCI-1.1 when multiple MSIs were 2561 * allocated. That is one MSI per port, starting from @irq. 2562 */ 2563 for (i = 0; i < host->n_ports; i++) { 2564 struct ahci_port_priv *pp = host->ports[i]->private_data; 2565 int irq = hpriv->get_irq_vector(host, i); 2566 2567 /* Do not receive interrupts sent by dummy ports */ 2568 if (!pp) { 2569 disable_irq(irq); 2570 continue; 2571 } 2572 2573 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard, 2574 0, pp->irq_desc, host->ports[i]); 2575 2576 if (rc) 2577 return rc; 2578 ata_port_desc(host->ports[i], "irq %d", irq); 2579 } 2580 2581 return ata_host_register(host, sht); 2582 } 2583 2584 /** 2585 * ahci_host_activate - start AHCI host, request IRQs and register it 2586 * @host: target ATA host 2587 * @sht: scsi_host_template to use when registering the host 2588 * 2589 * LOCKING: 2590 * Inherited from calling layer (may sleep). 2591 * 2592 * RETURNS: 2593 * 0 on success, -errno otherwise. 2594 */ 2595 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht) 2596 { 2597 struct ahci_host_priv *hpriv = host->private_data; 2598 int irq = hpriv->irq; 2599 int rc; 2600 2601 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { 2602 if (hpriv->irq_handler && 2603 hpriv->irq_handler != ahci_single_level_irq_intr) 2604 dev_warn(host->dev, 2605 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n"); 2606 if (!hpriv->get_irq_vector) { 2607 dev_err(host->dev, 2608 "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n"); 2609 return -EIO; 2610 } 2611 2612 rc = ahci_host_activate_multi_irqs(host, sht); 2613 } else { 2614 rc = ata_host_activate(host, irq, hpriv->irq_handler, 2615 IRQF_SHARED, sht); 2616 } 2617 2618 2619 return rc; 2620 } 2621 EXPORT_SYMBOL_GPL(ahci_host_activate); 2622 2623 MODULE_AUTHOR("Jeff Garzik"); 2624 MODULE_DESCRIPTION("Common AHCI SATA low-level routines"); 2625 MODULE_LICENSE("GPL"); 2626