1 /* 2 * libahci.c - Common AHCI SATA low-level routines 3 * 4 * Maintained by: Tejun Heo <tj@kernel.org> 5 * Please ALWAYS copy linux-ide@vger.kernel.org 6 * on emails. 7 * 8 * Copyright 2004-2005 Red Hat, Inc. 9 * 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2, or (at your option) 14 * any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; see the file COPYING. If not, write to 23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * 26 * libata documentation is available via 'make {ps|pdf}docs', 27 * as Documentation/DocBook/libata.* 28 * 29 * AHCI hardware documentation: 30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf 31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf 32 * 33 */ 34 35 #include <linux/kernel.h> 36 #include <linux/gfp.h> 37 #include <linux/module.h> 38 #include <linux/blkdev.h> 39 #include <linux/delay.h> 40 #include <linux/interrupt.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/device.h> 43 #include <scsi/scsi_host.h> 44 #include <scsi/scsi_cmnd.h> 45 #include <linux/libata.h> 46 #include <linux/pci.h> 47 #include "ahci.h" 48 #include "libata.h" 49 50 static int ahci_skip_host_reset; 51 int ahci_ignore_sss; 52 EXPORT_SYMBOL_GPL(ahci_ignore_sss); 53 54 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444); 55 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)"); 56 57 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444); 58 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)"); 59 60 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, 61 unsigned hints); 62 static ssize_t ahci_led_show(struct ata_port *ap, char *buf); 63 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, 64 size_t size); 65 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, 66 ssize_t size); 67 68 69 70 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); 71 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); 72 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc); 73 static int ahci_port_start(struct ata_port *ap); 74 static void ahci_port_stop(struct ata_port *ap); 75 static void ahci_qc_prep(struct ata_queued_cmd *qc); 76 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc); 77 static void ahci_freeze(struct ata_port *ap); 78 static void ahci_thaw(struct ata_port *ap); 79 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep); 80 static void ahci_enable_fbs(struct ata_port *ap); 81 static void ahci_disable_fbs(struct ata_port *ap); 82 static void ahci_pmp_attach(struct ata_port *ap); 83 static void ahci_pmp_detach(struct ata_port *ap); 84 static int ahci_softreset(struct ata_link *link, unsigned int *class, 85 unsigned long deadline); 86 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, 87 unsigned long deadline); 88 static int ahci_hardreset(struct ata_link *link, unsigned int *class, 89 unsigned long deadline); 90 static void ahci_postreset(struct ata_link *link, unsigned int *class); 91 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc); 92 static void ahci_dev_config(struct ata_device *dev); 93 #ifdef CONFIG_PM 94 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg); 95 #endif 96 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf); 97 static ssize_t ahci_activity_store(struct ata_device *dev, 98 enum sw_activity val); 99 static void ahci_init_sw_activity(struct ata_link *link); 100 101 static ssize_t ahci_show_host_caps(struct device *dev, 102 struct device_attribute *attr, char *buf); 103 static ssize_t ahci_show_host_cap2(struct device *dev, 104 struct device_attribute *attr, char *buf); 105 static ssize_t ahci_show_host_version(struct device *dev, 106 struct device_attribute *attr, char *buf); 107 static ssize_t ahci_show_port_cmd(struct device *dev, 108 struct device_attribute *attr, char *buf); 109 static ssize_t ahci_read_em_buffer(struct device *dev, 110 struct device_attribute *attr, char *buf); 111 static ssize_t ahci_store_em_buffer(struct device *dev, 112 struct device_attribute *attr, 113 const char *buf, size_t size); 114 static ssize_t ahci_show_em_supported(struct device *dev, 115 struct device_attribute *attr, char *buf); 116 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance); 117 118 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); 119 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL); 120 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL); 121 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL); 122 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, 123 ahci_read_em_buffer, ahci_store_em_buffer); 124 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL); 125 126 struct device_attribute *ahci_shost_attrs[] = { 127 &dev_attr_link_power_management_policy, 128 &dev_attr_em_message_type, 129 &dev_attr_em_message, 130 &dev_attr_ahci_host_caps, 131 &dev_attr_ahci_host_cap2, 132 &dev_attr_ahci_host_version, 133 &dev_attr_ahci_port_cmd, 134 &dev_attr_em_buffer, 135 &dev_attr_em_message_supported, 136 NULL 137 }; 138 EXPORT_SYMBOL_GPL(ahci_shost_attrs); 139 140 struct device_attribute *ahci_sdev_attrs[] = { 141 &dev_attr_sw_activity, 142 &dev_attr_unload_heads, 143 NULL 144 }; 145 EXPORT_SYMBOL_GPL(ahci_sdev_attrs); 146 147 struct ata_port_operations ahci_ops = { 148 .inherits = &sata_pmp_port_ops, 149 150 .qc_defer = ahci_pmp_qc_defer, 151 .qc_prep = ahci_qc_prep, 152 .qc_issue = ahci_qc_issue, 153 .qc_fill_rtf = ahci_qc_fill_rtf, 154 155 .freeze = ahci_freeze, 156 .thaw = ahci_thaw, 157 .softreset = ahci_softreset, 158 .hardreset = ahci_hardreset, 159 .postreset = ahci_postreset, 160 .pmp_softreset = ahci_softreset, 161 .error_handler = ahci_error_handler, 162 .post_internal_cmd = ahci_post_internal_cmd, 163 .dev_config = ahci_dev_config, 164 165 .scr_read = ahci_scr_read, 166 .scr_write = ahci_scr_write, 167 .pmp_attach = ahci_pmp_attach, 168 .pmp_detach = ahci_pmp_detach, 169 170 .set_lpm = ahci_set_lpm, 171 .em_show = ahci_led_show, 172 .em_store = ahci_led_store, 173 .sw_activity_show = ahci_activity_show, 174 .sw_activity_store = ahci_activity_store, 175 .transmit_led_message = ahci_transmit_led_message, 176 #ifdef CONFIG_PM 177 .port_suspend = ahci_port_suspend, 178 .port_resume = ahci_port_resume, 179 #endif 180 .port_start = ahci_port_start, 181 .port_stop = ahci_port_stop, 182 }; 183 EXPORT_SYMBOL_GPL(ahci_ops); 184 185 struct ata_port_operations ahci_pmp_retry_srst_ops = { 186 .inherits = &ahci_ops, 187 .softreset = ahci_pmp_retry_softreset, 188 }; 189 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops); 190 191 static bool ahci_em_messages __read_mostly = true; 192 EXPORT_SYMBOL_GPL(ahci_em_messages); 193 module_param(ahci_em_messages, bool, 0444); 194 /* add other LED protocol types when they become supported */ 195 MODULE_PARM_DESC(ahci_em_messages, 196 "AHCI Enclosure Management Message control (0 = off, 1 = on)"); 197 198 /* device sleep idle timeout in ms */ 199 static int devslp_idle_timeout __read_mostly = 1000; 200 module_param(devslp_idle_timeout, int, 0644); 201 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout"); 202 203 static void ahci_enable_ahci(void __iomem *mmio) 204 { 205 int i; 206 u32 tmp; 207 208 /* turn on AHCI_EN */ 209 tmp = readl(mmio + HOST_CTL); 210 if (tmp & HOST_AHCI_EN) 211 return; 212 213 /* Some controllers need AHCI_EN to be written multiple times. 214 * Try a few times before giving up. 215 */ 216 for (i = 0; i < 5; i++) { 217 tmp |= HOST_AHCI_EN; 218 writel(tmp, mmio + HOST_CTL); 219 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */ 220 if (tmp & HOST_AHCI_EN) 221 return; 222 msleep(10); 223 } 224 225 WARN_ON(1); 226 } 227 228 /** 229 * ahci_rpm_get_port - Make sure the port is powered on 230 * @ap: Port to power on 231 * 232 * Whenever there is need to access the AHCI host registers outside of 233 * normal execution paths, call this function to make sure the host is 234 * actually powered on. 235 */ 236 static int ahci_rpm_get_port(struct ata_port *ap) 237 { 238 return pm_runtime_get_sync(ap->dev); 239 } 240 241 /** 242 * ahci_rpm_put_port - Undoes ahci_rpm_get_port() 243 * @ap: Port to power down 244 * 245 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host 246 * if it has no more active users. 247 */ 248 static void ahci_rpm_put_port(struct ata_port *ap) 249 { 250 pm_runtime_put(ap->dev); 251 } 252 253 static ssize_t ahci_show_host_caps(struct device *dev, 254 struct device_attribute *attr, char *buf) 255 { 256 struct Scsi_Host *shost = class_to_shost(dev); 257 struct ata_port *ap = ata_shost_to_port(shost); 258 struct ahci_host_priv *hpriv = ap->host->private_data; 259 260 return sprintf(buf, "%x\n", hpriv->cap); 261 } 262 263 static ssize_t ahci_show_host_cap2(struct device *dev, 264 struct device_attribute *attr, char *buf) 265 { 266 struct Scsi_Host *shost = class_to_shost(dev); 267 struct ata_port *ap = ata_shost_to_port(shost); 268 struct ahci_host_priv *hpriv = ap->host->private_data; 269 270 return sprintf(buf, "%x\n", hpriv->cap2); 271 } 272 273 static ssize_t ahci_show_host_version(struct device *dev, 274 struct device_attribute *attr, char *buf) 275 { 276 struct Scsi_Host *shost = class_to_shost(dev); 277 struct ata_port *ap = ata_shost_to_port(shost); 278 struct ahci_host_priv *hpriv = ap->host->private_data; 279 280 return sprintf(buf, "%x\n", hpriv->version); 281 } 282 283 static ssize_t ahci_show_port_cmd(struct device *dev, 284 struct device_attribute *attr, char *buf) 285 { 286 struct Scsi_Host *shost = class_to_shost(dev); 287 struct ata_port *ap = ata_shost_to_port(shost); 288 void __iomem *port_mmio = ahci_port_base(ap); 289 ssize_t ret; 290 291 ahci_rpm_get_port(ap); 292 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD)); 293 ahci_rpm_put_port(ap); 294 295 return ret; 296 } 297 298 static ssize_t ahci_read_em_buffer(struct device *dev, 299 struct device_attribute *attr, char *buf) 300 { 301 struct Scsi_Host *shost = class_to_shost(dev); 302 struct ata_port *ap = ata_shost_to_port(shost); 303 struct ahci_host_priv *hpriv = ap->host->private_data; 304 void __iomem *mmio = hpriv->mmio; 305 void __iomem *em_mmio = mmio + hpriv->em_loc; 306 u32 em_ctl, msg; 307 unsigned long flags; 308 size_t count; 309 int i; 310 311 ahci_rpm_get_port(ap); 312 spin_lock_irqsave(ap->lock, flags); 313 314 em_ctl = readl(mmio + HOST_EM_CTL); 315 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT || 316 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) { 317 spin_unlock_irqrestore(ap->lock, flags); 318 ahci_rpm_put_port(ap); 319 return -EINVAL; 320 } 321 322 if (!(em_ctl & EM_CTL_MR)) { 323 spin_unlock_irqrestore(ap->lock, flags); 324 ahci_rpm_put_port(ap); 325 return -EAGAIN; 326 } 327 328 if (!(em_ctl & EM_CTL_SMB)) 329 em_mmio += hpriv->em_buf_sz; 330 331 count = hpriv->em_buf_sz; 332 333 /* the count should not be larger than PAGE_SIZE */ 334 if (count > PAGE_SIZE) { 335 if (printk_ratelimit()) 336 ata_port_warn(ap, 337 "EM read buffer size too large: " 338 "buffer size %u, page size %lu\n", 339 hpriv->em_buf_sz, PAGE_SIZE); 340 count = PAGE_SIZE; 341 } 342 343 for (i = 0; i < count; i += 4) { 344 msg = readl(em_mmio + i); 345 buf[i] = msg & 0xff; 346 buf[i + 1] = (msg >> 8) & 0xff; 347 buf[i + 2] = (msg >> 16) & 0xff; 348 buf[i + 3] = (msg >> 24) & 0xff; 349 } 350 351 spin_unlock_irqrestore(ap->lock, flags); 352 ahci_rpm_put_port(ap); 353 354 return i; 355 } 356 357 static ssize_t ahci_store_em_buffer(struct device *dev, 358 struct device_attribute *attr, 359 const char *buf, size_t size) 360 { 361 struct Scsi_Host *shost = class_to_shost(dev); 362 struct ata_port *ap = ata_shost_to_port(shost); 363 struct ahci_host_priv *hpriv = ap->host->private_data; 364 void __iomem *mmio = hpriv->mmio; 365 void __iomem *em_mmio = mmio + hpriv->em_loc; 366 const unsigned char *msg_buf = buf; 367 u32 em_ctl, msg; 368 unsigned long flags; 369 int i; 370 371 /* check size validity */ 372 if (!(ap->flags & ATA_FLAG_EM) || 373 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) || 374 size % 4 || size > hpriv->em_buf_sz) 375 return -EINVAL; 376 377 ahci_rpm_get_port(ap); 378 spin_lock_irqsave(ap->lock, flags); 379 380 em_ctl = readl(mmio + HOST_EM_CTL); 381 if (em_ctl & EM_CTL_TM) { 382 spin_unlock_irqrestore(ap->lock, flags); 383 ahci_rpm_put_port(ap); 384 return -EBUSY; 385 } 386 387 for (i = 0; i < size; i += 4) { 388 msg = msg_buf[i] | msg_buf[i + 1] << 8 | 389 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24; 390 writel(msg, em_mmio + i); 391 } 392 393 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); 394 395 spin_unlock_irqrestore(ap->lock, flags); 396 ahci_rpm_put_port(ap); 397 398 return size; 399 } 400 401 static ssize_t ahci_show_em_supported(struct device *dev, 402 struct device_attribute *attr, char *buf) 403 { 404 struct Scsi_Host *shost = class_to_shost(dev); 405 struct ata_port *ap = ata_shost_to_port(shost); 406 struct ahci_host_priv *hpriv = ap->host->private_data; 407 void __iomem *mmio = hpriv->mmio; 408 u32 em_ctl; 409 410 ahci_rpm_get_port(ap); 411 em_ctl = readl(mmio + HOST_EM_CTL); 412 ahci_rpm_put_port(ap); 413 414 return sprintf(buf, "%s%s%s%s\n", 415 em_ctl & EM_CTL_LED ? "led " : "", 416 em_ctl & EM_CTL_SAFTE ? "saf-te " : "", 417 em_ctl & EM_CTL_SES ? "ses-2 " : "", 418 em_ctl & EM_CTL_SGPIO ? "sgpio " : ""); 419 } 420 421 /** 422 * ahci_save_initial_config - Save and fixup initial config values 423 * @dev: target AHCI device 424 * @hpriv: host private area to store config values 425 * 426 * Some registers containing configuration info might be setup by 427 * BIOS and might be cleared on reset. This function saves the 428 * initial values of those registers into @hpriv such that they 429 * can be restored after controller reset. 430 * 431 * If inconsistent, config values are fixed up by this function. 432 * 433 * If it is not set already this function sets hpriv->start_engine to 434 * ahci_start_engine. 435 * 436 * LOCKING: 437 * None. 438 */ 439 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv) 440 { 441 void __iomem *mmio = hpriv->mmio; 442 u32 cap, cap2, vers, port_map; 443 int i; 444 445 /* make sure AHCI mode is enabled before accessing CAP */ 446 ahci_enable_ahci(mmio); 447 448 /* Values prefixed with saved_ are written back to host after 449 * reset. Values without are used for driver operation. 450 */ 451 hpriv->saved_cap = cap = readl(mmio + HOST_CAP); 452 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL); 453 454 /* CAP2 register is only defined for AHCI 1.2 and later */ 455 vers = readl(mmio + HOST_VERSION); 456 if ((vers >> 16) > 1 || 457 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200)) 458 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2); 459 else 460 hpriv->saved_cap2 = cap2 = 0; 461 462 /* some chips have errata preventing 64bit use */ 463 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) { 464 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n"); 465 cap &= ~HOST_CAP_64; 466 } 467 468 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) { 469 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n"); 470 cap &= ~HOST_CAP_NCQ; 471 } 472 473 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) { 474 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n"); 475 cap |= HOST_CAP_NCQ; 476 } 477 478 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) { 479 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n"); 480 cap &= ~HOST_CAP_PMP; 481 } 482 483 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) { 484 dev_info(dev, 485 "controller can't do SNTF, turning off CAP_SNTF\n"); 486 cap &= ~HOST_CAP_SNTF; 487 } 488 489 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) { 490 dev_info(dev, 491 "controller can't do DEVSLP, turning off\n"); 492 cap2 &= ~HOST_CAP2_SDS; 493 cap2 &= ~HOST_CAP2_SADM; 494 } 495 496 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) { 497 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n"); 498 cap |= HOST_CAP_FBS; 499 } 500 501 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) { 502 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n"); 503 cap &= ~HOST_CAP_FBS; 504 } 505 506 if (hpriv->force_port_map && port_map != hpriv->force_port_map) { 507 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n", 508 port_map, hpriv->force_port_map); 509 port_map = hpriv->force_port_map; 510 hpriv->saved_port_map = port_map; 511 } 512 513 if (hpriv->mask_port_map) { 514 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n", 515 port_map, 516 port_map & hpriv->mask_port_map); 517 port_map &= hpriv->mask_port_map; 518 } 519 520 /* cross check port_map and cap.n_ports */ 521 if (port_map) { 522 int map_ports = 0; 523 524 for (i = 0; i < AHCI_MAX_PORTS; i++) 525 if (port_map & (1 << i)) 526 map_ports++; 527 528 /* If PI has more ports than n_ports, whine, clear 529 * port_map and let it be generated from n_ports. 530 */ 531 if (map_ports > ahci_nr_ports(cap)) { 532 dev_warn(dev, 533 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n", 534 port_map, ahci_nr_ports(cap)); 535 port_map = 0; 536 } 537 } 538 539 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */ 540 if (!port_map && vers < 0x10300) { 541 port_map = (1 << ahci_nr_ports(cap)) - 1; 542 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map); 543 544 /* write the fixed up value to the PI register */ 545 hpriv->saved_port_map = port_map; 546 } 547 548 /* record values to use during operation */ 549 hpriv->cap = cap; 550 hpriv->cap2 = cap2; 551 hpriv->version = readl(mmio + HOST_VERSION); 552 hpriv->port_map = port_map; 553 554 if (!hpriv->start_engine) 555 hpriv->start_engine = ahci_start_engine; 556 557 if (!hpriv->irq_handler) 558 hpriv->irq_handler = ahci_single_level_irq_intr; 559 } 560 EXPORT_SYMBOL_GPL(ahci_save_initial_config); 561 562 /** 563 * ahci_restore_initial_config - Restore initial config 564 * @host: target ATA host 565 * 566 * Restore initial config stored by ahci_save_initial_config(). 567 * 568 * LOCKING: 569 * None. 570 */ 571 static void ahci_restore_initial_config(struct ata_host *host) 572 { 573 struct ahci_host_priv *hpriv = host->private_data; 574 void __iomem *mmio = hpriv->mmio; 575 576 writel(hpriv->saved_cap, mmio + HOST_CAP); 577 if (hpriv->saved_cap2) 578 writel(hpriv->saved_cap2, mmio + HOST_CAP2); 579 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL); 580 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ 581 } 582 583 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg) 584 { 585 static const int offset[] = { 586 [SCR_STATUS] = PORT_SCR_STAT, 587 [SCR_CONTROL] = PORT_SCR_CTL, 588 [SCR_ERROR] = PORT_SCR_ERR, 589 [SCR_ACTIVE] = PORT_SCR_ACT, 590 [SCR_NOTIFICATION] = PORT_SCR_NTF, 591 }; 592 struct ahci_host_priv *hpriv = ap->host->private_data; 593 594 if (sc_reg < ARRAY_SIZE(offset) && 595 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF))) 596 return offset[sc_reg]; 597 return 0; 598 } 599 600 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) 601 { 602 void __iomem *port_mmio = ahci_port_base(link->ap); 603 int offset = ahci_scr_offset(link->ap, sc_reg); 604 605 if (offset) { 606 *val = readl(port_mmio + offset); 607 return 0; 608 } 609 return -EINVAL; 610 } 611 612 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) 613 { 614 void __iomem *port_mmio = ahci_port_base(link->ap); 615 int offset = ahci_scr_offset(link->ap, sc_reg); 616 617 if (offset) { 618 writel(val, port_mmio + offset); 619 return 0; 620 } 621 return -EINVAL; 622 } 623 624 void ahci_start_engine(struct ata_port *ap) 625 { 626 void __iomem *port_mmio = ahci_port_base(ap); 627 u32 tmp; 628 629 /* start DMA */ 630 tmp = readl(port_mmio + PORT_CMD); 631 tmp |= PORT_CMD_START; 632 writel(tmp, port_mmio + PORT_CMD); 633 readl(port_mmio + PORT_CMD); /* flush */ 634 } 635 EXPORT_SYMBOL_GPL(ahci_start_engine); 636 637 int ahci_stop_engine(struct ata_port *ap) 638 { 639 void __iomem *port_mmio = ahci_port_base(ap); 640 struct ahci_host_priv *hpriv = ap->host->private_data; 641 u32 tmp; 642 643 /* 644 * On some controllers, stopping a port's DMA engine while the port 645 * is in ALPM state (partial or slumber) results in failures on 646 * subsequent DMA engine starts. For those controllers, put the 647 * port back in active state before stopping its DMA engine. 648 */ 649 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) && 650 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) && 651 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) { 652 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n"); 653 return -EIO; 654 } 655 656 tmp = readl(port_mmio + PORT_CMD); 657 658 /* check if the HBA is idle */ 659 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0) 660 return 0; 661 662 /* setting HBA to idle */ 663 tmp &= ~PORT_CMD_START; 664 writel(tmp, port_mmio + PORT_CMD); 665 666 /* wait for engine to stop. This could be as long as 500 msec */ 667 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, 668 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500); 669 if (tmp & PORT_CMD_LIST_ON) 670 return -EIO; 671 672 return 0; 673 } 674 EXPORT_SYMBOL_GPL(ahci_stop_engine); 675 676 void ahci_start_fis_rx(struct ata_port *ap) 677 { 678 void __iomem *port_mmio = ahci_port_base(ap); 679 struct ahci_host_priv *hpriv = ap->host->private_data; 680 struct ahci_port_priv *pp = ap->private_data; 681 u32 tmp; 682 683 /* set FIS registers */ 684 if (hpriv->cap & HOST_CAP_64) 685 writel((pp->cmd_slot_dma >> 16) >> 16, 686 port_mmio + PORT_LST_ADDR_HI); 687 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); 688 689 if (hpriv->cap & HOST_CAP_64) 690 writel((pp->rx_fis_dma >> 16) >> 16, 691 port_mmio + PORT_FIS_ADDR_HI); 692 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); 693 694 /* enable FIS reception */ 695 tmp = readl(port_mmio + PORT_CMD); 696 tmp |= PORT_CMD_FIS_RX; 697 writel(tmp, port_mmio + PORT_CMD); 698 699 /* flush */ 700 readl(port_mmio + PORT_CMD); 701 } 702 EXPORT_SYMBOL_GPL(ahci_start_fis_rx); 703 704 static int ahci_stop_fis_rx(struct ata_port *ap) 705 { 706 void __iomem *port_mmio = ahci_port_base(ap); 707 u32 tmp; 708 709 /* disable FIS reception */ 710 tmp = readl(port_mmio + PORT_CMD); 711 tmp &= ~PORT_CMD_FIS_RX; 712 writel(tmp, port_mmio + PORT_CMD); 713 714 /* wait for completion, spec says 500ms, give it 1000 */ 715 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON, 716 PORT_CMD_FIS_ON, 10, 1000); 717 if (tmp & PORT_CMD_FIS_ON) 718 return -EBUSY; 719 720 return 0; 721 } 722 723 static void ahci_power_up(struct ata_port *ap) 724 { 725 struct ahci_host_priv *hpriv = ap->host->private_data; 726 void __iomem *port_mmio = ahci_port_base(ap); 727 u32 cmd; 728 729 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; 730 731 /* spin up device */ 732 if (hpriv->cap & HOST_CAP_SSS) { 733 cmd |= PORT_CMD_SPIN_UP; 734 writel(cmd, port_mmio + PORT_CMD); 735 } 736 737 /* wake up link */ 738 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD); 739 } 740 741 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, 742 unsigned int hints) 743 { 744 struct ata_port *ap = link->ap; 745 struct ahci_host_priv *hpriv = ap->host->private_data; 746 struct ahci_port_priv *pp = ap->private_data; 747 void __iomem *port_mmio = ahci_port_base(ap); 748 749 if (policy != ATA_LPM_MAX_POWER) { 750 /* wakeup flag only applies to the max power policy */ 751 hints &= ~ATA_LPM_WAKE_ONLY; 752 753 /* 754 * Disable interrupts on Phy Ready. This keeps us from 755 * getting woken up due to spurious phy ready 756 * interrupts. 757 */ 758 pp->intr_mask &= ~PORT_IRQ_PHYRDY; 759 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 760 761 sata_link_scr_lpm(link, policy, false); 762 } 763 764 if (hpriv->cap & HOST_CAP_ALPM) { 765 u32 cmd = readl(port_mmio + PORT_CMD); 766 767 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) { 768 if (!(hints & ATA_LPM_WAKE_ONLY)) 769 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE); 770 cmd |= PORT_CMD_ICC_ACTIVE; 771 772 writel(cmd, port_mmio + PORT_CMD); 773 readl(port_mmio + PORT_CMD); 774 775 /* wait 10ms to be sure we've come out of LPM state */ 776 ata_msleep(ap, 10); 777 778 if (hints & ATA_LPM_WAKE_ONLY) 779 return 0; 780 } else { 781 cmd |= PORT_CMD_ALPE; 782 if (policy == ATA_LPM_MIN_POWER) 783 cmd |= PORT_CMD_ASP; 784 785 /* write out new cmd value */ 786 writel(cmd, port_mmio + PORT_CMD); 787 } 788 } 789 790 /* set aggressive device sleep */ 791 if ((hpriv->cap2 & HOST_CAP2_SDS) && 792 (hpriv->cap2 & HOST_CAP2_SADM) && 793 (link->device->flags & ATA_DFLAG_DEVSLP)) { 794 if (policy == ATA_LPM_MIN_POWER) 795 ahci_set_aggressive_devslp(ap, true); 796 else 797 ahci_set_aggressive_devslp(ap, false); 798 } 799 800 if (policy == ATA_LPM_MAX_POWER) { 801 sata_link_scr_lpm(link, policy, false); 802 803 /* turn PHYRDY IRQ back on */ 804 pp->intr_mask |= PORT_IRQ_PHYRDY; 805 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 806 } 807 808 return 0; 809 } 810 811 #ifdef CONFIG_PM 812 static void ahci_power_down(struct ata_port *ap) 813 { 814 struct ahci_host_priv *hpriv = ap->host->private_data; 815 void __iomem *port_mmio = ahci_port_base(ap); 816 u32 cmd, scontrol; 817 818 if (!(hpriv->cap & HOST_CAP_SSS)) 819 return; 820 821 /* put device into listen mode, first set PxSCTL.DET to 0 */ 822 scontrol = readl(port_mmio + PORT_SCR_CTL); 823 scontrol &= ~0xf; 824 writel(scontrol, port_mmio + PORT_SCR_CTL); 825 826 /* then set PxCMD.SUD to 0 */ 827 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; 828 cmd &= ~PORT_CMD_SPIN_UP; 829 writel(cmd, port_mmio + PORT_CMD); 830 } 831 #endif 832 833 static void ahci_start_port(struct ata_port *ap) 834 { 835 struct ahci_host_priv *hpriv = ap->host->private_data; 836 struct ahci_port_priv *pp = ap->private_data; 837 struct ata_link *link; 838 struct ahci_em_priv *emp; 839 ssize_t rc; 840 int i; 841 842 /* enable FIS reception */ 843 ahci_start_fis_rx(ap); 844 845 /* enable DMA */ 846 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE)) 847 hpriv->start_engine(ap); 848 849 /* turn on LEDs */ 850 if (ap->flags & ATA_FLAG_EM) { 851 ata_for_each_link(link, ap, EDGE) { 852 emp = &pp->em_priv[link->pmp]; 853 854 /* EM Transmit bit maybe busy during init */ 855 for (i = 0; i < EM_MAX_RETRY; i++) { 856 rc = ap->ops->transmit_led_message(ap, 857 emp->led_state, 858 4); 859 /* 860 * If busy, give a breather but do not 861 * release EH ownership by using msleep() 862 * instead of ata_msleep(). EM Transmit 863 * bit is busy for the whole host and 864 * releasing ownership will cause other 865 * ports to fail the same way. 866 */ 867 if (rc == -EBUSY) 868 msleep(1); 869 else 870 break; 871 } 872 } 873 } 874 875 if (ap->flags & ATA_FLAG_SW_ACTIVITY) 876 ata_for_each_link(link, ap, EDGE) 877 ahci_init_sw_activity(link); 878 879 } 880 881 static int ahci_deinit_port(struct ata_port *ap, const char **emsg) 882 { 883 int rc; 884 885 /* disable DMA */ 886 rc = ahci_stop_engine(ap); 887 if (rc) { 888 *emsg = "failed to stop engine"; 889 return rc; 890 } 891 892 /* disable FIS reception */ 893 rc = ahci_stop_fis_rx(ap); 894 if (rc) { 895 *emsg = "failed stop FIS RX"; 896 return rc; 897 } 898 899 return 0; 900 } 901 902 int ahci_reset_controller(struct ata_host *host) 903 { 904 struct ahci_host_priv *hpriv = host->private_data; 905 void __iomem *mmio = hpriv->mmio; 906 u32 tmp; 907 908 /* we must be in AHCI mode, before using anything 909 * AHCI-specific, such as HOST_RESET. 910 */ 911 ahci_enable_ahci(mmio); 912 913 /* global controller reset */ 914 if (!ahci_skip_host_reset) { 915 tmp = readl(mmio + HOST_CTL); 916 if ((tmp & HOST_RESET) == 0) { 917 writel(tmp | HOST_RESET, mmio + HOST_CTL); 918 readl(mmio + HOST_CTL); /* flush */ 919 } 920 921 /* 922 * to perform host reset, OS should set HOST_RESET 923 * and poll until this bit is read to be "0". 924 * reset must complete within 1 second, or 925 * the hardware should be considered fried. 926 */ 927 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET, 928 HOST_RESET, 10, 1000); 929 930 if (tmp & HOST_RESET) { 931 dev_err(host->dev, "controller reset failed (0x%x)\n", 932 tmp); 933 return -EIO; 934 } 935 936 /* turn on AHCI mode */ 937 ahci_enable_ahci(mmio); 938 939 /* Some registers might be cleared on reset. Restore 940 * initial values. 941 */ 942 ahci_restore_initial_config(host); 943 } else 944 dev_info(host->dev, "skipping global host reset\n"); 945 946 return 0; 947 } 948 EXPORT_SYMBOL_GPL(ahci_reset_controller); 949 950 static void ahci_sw_activity(struct ata_link *link) 951 { 952 struct ata_port *ap = link->ap; 953 struct ahci_port_priv *pp = ap->private_data; 954 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 955 956 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY)) 957 return; 958 959 emp->activity++; 960 if (!timer_pending(&emp->timer)) 961 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10)); 962 } 963 964 static void ahci_sw_activity_blink(unsigned long arg) 965 { 966 struct ata_link *link = (struct ata_link *)arg; 967 struct ata_port *ap = link->ap; 968 struct ahci_port_priv *pp = ap->private_data; 969 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 970 unsigned long led_message = emp->led_state; 971 u32 activity_led_state; 972 unsigned long flags; 973 974 led_message &= EM_MSG_LED_VALUE; 975 led_message |= ap->port_no | (link->pmp << 8); 976 977 /* check to see if we've had activity. If so, 978 * toggle state of LED and reset timer. If not, 979 * turn LED to desired idle state. 980 */ 981 spin_lock_irqsave(ap->lock, flags); 982 if (emp->saved_activity != emp->activity) { 983 emp->saved_activity = emp->activity; 984 /* get the current LED state */ 985 activity_led_state = led_message & EM_MSG_LED_VALUE_ON; 986 987 if (activity_led_state) 988 activity_led_state = 0; 989 else 990 activity_led_state = 1; 991 992 /* clear old state */ 993 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; 994 995 /* toggle state */ 996 led_message |= (activity_led_state << 16); 997 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100)); 998 } else { 999 /* switch to idle */ 1000 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; 1001 if (emp->blink_policy == BLINK_OFF) 1002 led_message |= (1 << 16); 1003 } 1004 spin_unlock_irqrestore(ap->lock, flags); 1005 ap->ops->transmit_led_message(ap, led_message, 4); 1006 } 1007 1008 static void ahci_init_sw_activity(struct ata_link *link) 1009 { 1010 struct ata_port *ap = link->ap; 1011 struct ahci_port_priv *pp = ap->private_data; 1012 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1013 1014 /* init activity stats, setup timer */ 1015 emp->saved_activity = emp->activity = 0; 1016 setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link); 1017 1018 /* check our blink policy and set flag for link if it's enabled */ 1019 if (emp->blink_policy) 1020 link->flags |= ATA_LFLAG_SW_ACTIVITY; 1021 } 1022 1023 int ahci_reset_em(struct ata_host *host) 1024 { 1025 struct ahci_host_priv *hpriv = host->private_data; 1026 void __iomem *mmio = hpriv->mmio; 1027 u32 em_ctl; 1028 1029 em_ctl = readl(mmio + HOST_EM_CTL); 1030 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST)) 1031 return -EINVAL; 1032 1033 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL); 1034 return 0; 1035 } 1036 EXPORT_SYMBOL_GPL(ahci_reset_em); 1037 1038 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, 1039 ssize_t size) 1040 { 1041 struct ahci_host_priv *hpriv = ap->host->private_data; 1042 struct ahci_port_priv *pp = ap->private_data; 1043 void __iomem *mmio = hpriv->mmio; 1044 u32 em_ctl; 1045 u32 message[] = {0, 0}; 1046 unsigned long flags; 1047 int pmp; 1048 struct ahci_em_priv *emp; 1049 1050 /* get the slot number from the message */ 1051 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; 1052 if (pmp < EM_MAX_SLOTS) 1053 emp = &pp->em_priv[pmp]; 1054 else 1055 return -EINVAL; 1056 1057 ahci_rpm_get_port(ap); 1058 spin_lock_irqsave(ap->lock, flags); 1059 1060 /* 1061 * if we are still busy transmitting a previous message, 1062 * do not allow 1063 */ 1064 em_ctl = readl(mmio + HOST_EM_CTL); 1065 if (em_ctl & EM_CTL_TM) { 1066 spin_unlock_irqrestore(ap->lock, flags); 1067 ahci_rpm_put_port(ap); 1068 return -EBUSY; 1069 } 1070 1071 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) { 1072 /* 1073 * create message header - this is all zero except for 1074 * the message size, which is 4 bytes. 1075 */ 1076 message[0] |= (4 << 8); 1077 1078 /* ignore 0:4 of byte zero, fill in port info yourself */ 1079 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no); 1080 1081 /* write message to EM_LOC */ 1082 writel(message[0], mmio + hpriv->em_loc); 1083 writel(message[1], mmio + hpriv->em_loc+4); 1084 1085 /* 1086 * tell hardware to transmit the message 1087 */ 1088 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); 1089 } 1090 1091 /* save off new led state for port/slot */ 1092 emp->led_state = state; 1093 1094 spin_unlock_irqrestore(ap->lock, flags); 1095 ahci_rpm_put_port(ap); 1096 1097 return size; 1098 } 1099 1100 static ssize_t ahci_led_show(struct ata_port *ap, char *buf) 1101 { 1102 struct ahci_port_priv *pp = ap->private_data; 1103 struct ata_link *link; 1104 struct ahci_em_priv *emp; 1105 int rc = 0; 1106 1107 ata_for_each_link(link, ap, EDGE) { 1108 emp = &pp->em_priv[link->pmp]; 1109 rc += sprintf(buf, "%lx\n", emp->led_state); 1110 } 1111 return rc; 1112 } 1113 1114 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, 1115 size_t size) 1116 { 1117 unsigned int state; 1118 int pmp; 1119 struct ahci_port_priv *pp = ap->private_data; 1120 struct ahci_em_priv *emp; 1121 1122 if (kstrtouint(buf, 0, &state) < 0) 1123 return -EINVAL; 1124 1125 /* get the slot number from the message */ 1126 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; 1127 if (pmp < EM_MAX_SLOTS) 1128 emp = &pp->em_priv[pmp]; 1129 else 1130 return -EINVAL; 1131 1132 /* mask off the activity bits if we are in sw_activity 1133 * mode, user should turn off sw_activity before setting 1134 * activity led through em_message 1135 */ 1136 if (emp->blink_policy) 1137 state &= ~EM_MSG_LED_VALUE_ACTIVITY; 1138 1139 return ap->ops->transmit_led_message(ap, state, size); 1140 } 1141 1142 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) 1143 { 1144 struct ata_link *link = dev->link; 1145 struct ata_port *ap = link->ap; 1146 struct ahci_port_priv *pp = ap->private_data; 1147 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1148 u32 port_led_state = emp->led_state; 1149 1150 /* save the desired Activity LED behavior */ 1151 if (val == OFF) { 1152 /* clear LFLAG */ 1153 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY); 1154 1155 /* set the LED to OFF */ 1156 port_led_state &= EM_MSG_LED_VALUE_OFF; 1157 port_led_state |= (ap->port_no | (link->pmp << 8)); 1158 ap->ops->transmit_led_message(ap, port_led_state, 4); 1159 } else { 1160 link->flags |= ATA_LFLAG_SW_ACTIVITY; 1161 if (val == BLINK_OFF) { 1162 /* set LED to ON for idle */ 1163 port_led_state &= EM_MSG_LED_VALUE_OFF; 1164 port_led_state |= (ap->port_no | (link->pmp << 8)); 1165 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */ 1166 ap->ops->transmit_led_message(ap, port_led_state, 4); 1167 } 1168 } 1169 emp->blink_policy = val; 1170 return 0; 1171 } 1172 1173 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf) 1174 { 1175 struct ata_link *link = dev->link; 1176 struct ata_port *ap = link->ap; 1177 struct ahci_port_priv *pp = ap->private_data; 1178 struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; 1179 1180 /* display the saved value of activity behavior for this 1181 * disk. 1182 */ 1183 return sprintf(buf, "%d\n", emp->blink_policy); 1184 } 1185 1186 static void ahci_port_init(struct device *dev, struct ata_port *ap, 1187 int port_no, void __iomem *mmio, 1188 void __iomem *port_mmio) 1189 { 1190 struct ahci_host_priv *hpriv = ap->host->private_data; 1191 const char *emsg = NULL; 1192 int rc; 1193 u32 tmp; 1194 1195 /* make sure port is not active */ 1196 rc = ahci_deinit_port(ap, &emsg); 1197 if (rc) 1198 dev_warn(dev, "%s (%d)\n", emsg, rc); 1199 1200 /* clear SError */ 1201 tmp = readl(port_mmio + PORT_SCR_ERR); 1202 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp); 1203 writel(tmp, port_mmio + PORT_SCR_ERR); 1204 1205 /* clear port IRQ */ 1206 tmp = readl(port_mmio + PORT_IRQ_STAT); 1207 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp); 1208 if (tmp) 1209 writel(tmp, port_mmio + PORT_IRQ_STAT); 1210 1211 writel(1 << port_no, mmio + HOST_IRQ_STAT); 1212 1213 /* mark esata ports */ 1214 tmp = readl(port_mmio + PORT_CMD); 1215 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS)) 1216 ap->pflags |= ATA_PFLAG_EXTERNAL; 1217 } 1218 1219 void ahci_init_controller(struct ata_host *host) 1220 { 1221 struct ahci_host_priv *hpriv = host->private_data; 1222 void __iomem *mmio = hpriv->mmio; 1223 int i; 1224 void __iomem *port_mmio; 1225 u32 tmp; 1226 1227 for (i = 0; i < host->n_ports; i++) { 1228 struct ata_port *ap = host->ports[i]; 1229 1230 port_mmio = ahci_port_base(ap); 1231 if (ata_port_is_dummy(ap)) 1232 continue; 1233 1234 ahci_port_init(host->dev, ap, i, mmio, port_mmio); 1235 } 1236 1237 tmp = readl(mmio + HOST_CTL); 1238 VPRINTK("HOST_CTL 0x%x\n", tmp); 1239 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); 1240 tmp = readl(mmio + HOST_CTL); 1241 VPRINTK("HOST_CTL 0x%x\n", tmp); 1242 } 1243 EXPORT_SYMBOL_GPL(ahci_init_controller); 1244 1245 static void ahci_dev_config(struct ata_device *dev) 1246 { 1247 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data; 1248 1249 if (hpriv->flags & AHCI_HFLAG_SECT255) { 1250 dev->max_sectors = 255; 1251 ata_dev_info(dev, 1252 "SB600 AHCI: limiting to 255 sectors per cmd\n"); 1253 } 1254 } 1255 1256 unsigned int ahci_dev_classify(struct ata_port *ap) 1257 { 1258 void __iomem *port_mmio = ahci_port_base(ap); 1259 struct ata_taskfile tf; 1260 u32 tmp; 1261 1262 tmp = readl(port_mmio + PORT_SIG); 1263 tf.lbah = (tmp >> 24) & 0xff; 1264 tf.lbam = (tmp >> 16) & 0xff; 1265 tf.lbal = (tmp >> 8) & 0xff; 1266 tf.nsect = (tmp) & 0xff; 1267 1268 return ata_dev_classify(&tf); 1269 } 1270 EXPORT_SYMBOL_GPL(ahci_dev_classify); 1271 1272 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, 1273 u32 opts) 1274 { 1275 dma_addr_t cmd_tbl_dma; 1276 1277 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ; 1278 1279 pp->cmd_slot[tag].opts = cpu_to_le32(opts); 1280 pp->cmd_slot[tag].status = 0; 1281 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff); 1282 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16); 1283 } 1284 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot); 1285 1286 int ahci_kick_engine(struct ata_port *ap) 1287 { 1288 void __iomem *port_mmio = ahci_port_base(ap); 1289 struct ahci_host_priv *hpriv = ap->host->private_data; 1290 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1291 u32 tmp; 1292 int busy, rc; 1293 1294 /* stop engine */ 1295 rc = ahci_stop_engine(ap); 1296 if (rc) 1297 goto out_restart; 1298 1299 /* need to do CLO? 1300 * always do CLO if PMP is attached (AHCI-1.3 9.2) 1301 */ 1302 busy = status & (ATA_BUSY | ATA_DRQ); 1303 if (!busy && !sata_pmp_attached(ap)) { 1304 rc = 0; 1305 goto out_restart; 1306 } 1307 1308 if (!(hpriv->cap & HOST_CAP_CLO)) { 1309 rc = -EOPNOTSUPP; 1310 goto out_restart; 1311 } 1312 1313 /* perform CLO */ 1314 tmp = readl(port_mmio + PORT_CMD); 1315 tmp |= PORT_CMD_CLO; 1316 writel(tmp, port_mmio + PORT_CMD); 1317 1318 rc = 0; 1319 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, 1320 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); 1321 if (tmp & PORT_CMD_CLO) 1322 rc = -EIO; 1323 1324 /* restart engine */ 1325 out_restart: 1326 hpriv->start_engine(ap); 1327 return rc; 1328 } 1329 EXPORT_SYMBOL_GPL(ahci_kick_engine); 1330 1331 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp, 1332 struct ata_taskfile *tf, int is_cmd, u16 flags, 1333 unsigned long timeout_msec) 1334 { 1335 const u32 cmd_fis_len = 5; /* five dwords */ 1336 struct ahci_port_priv *pp = ap->private_data; 1337 void __iomem *port_mmio = ahci_port_base(ap); 1338 u8 *fis = pp->cmd_tbl; 1339 u32 tmp; 1340 1341 /* prep the command */ 1342 ata_tf_to_fis(tf, pmp, is_cmd, fis); 1343 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12)); 1344 1345 /* set port value for softreset of Port Multiplier */ 1346 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) { 1347 tmp = readl(port_mmio + PORT_FBS); 1348 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); 1349 tmp |= pmp << PORT_FBS_DEV_OFFSET; 1350 writel(tmp, port_mmio + PORT_FBS); 1351 pp->fbs_last_dev = pmp; 1352 } 1353 1354 /* issue & wait */ 1355 writel(1, port_mmio + PORT_CMD_ISSUE); 1356 1357 if (timeout_msec) { 1358 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE, 1359 0x1, 0x1, 1, timeout_msec); 1360 if (tmp & 0x1) { 1361 ahci_kick_engine(ap); 1362 return -EBUSY; 1363 } 1364 } else 1365 readl(port_mmio + PORT_CMD_ISSUE); /* flush */ 1366 1367 return 0; 1368 } 1369 1370 int ahci_do_softreset(struct ata_link *link, unsigned int *class, 1371 int pmp, unsigned long deadline, 1372 int (*check_ready)(struct ata_link *link)) 1373 { 1374 struct ata_port *ap = link->ap; 1375 struct ahci_host_priv *hpriv = ap->host->private_data; 1376 struct ahci_port_priv *pp = ap->private_data; 1377 const char *reason = NULL; 1378 unsigned long now, msecs; 1379 struct ata_taskfile tf; 1380 bool fbs_disabled = false; 1381 int rc; 1382 1383 DPRINTK("ENTER\n"); 1384 1385 /* prepare for SRST (AHCI-1.1 10.4.1) */ 1386 rc = ahci_kick_engine(ap); 1387 if (rc && rc != -EOPNOTSUPP) 1388 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc); 1389 1390 /* 1391 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall 1392 * clear PxFBS.EN to '0' prior to issuing software reset to devices 1393 * that is attached to port multiplier. 1394 */ 1395 if (!ata_is_host_link(link) && pp->fbs_enabled) { 1396 ahci_disable_fbs(ap); 1397 fbs_disabled = true; 1398 } 1399 1400 ata_tf_init(link->device, &tf); 1401 1402 /* issue the first D2H Register FIS */ 1403 msecs = 0; 1404 now = jiffies; 1405 if (time_after(deadline, now)) 1406 msecs = jiffies_to_msecs(deadline - now); 1407 1408 tf.ctl |= ATA_SRST; 1409 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0, 1410 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) { 1411 rc = -EIO; 1412 reason = "1st FIS failed"; 1413 goto fail; 1414 } 1415 1416 /* spec says at least 5us, but be generous and sleep for 1ms */ 1417 ata_msleep(ap, 1); 1418 1419 /* issue the second D2H Register FIS */ 1420 tf.ctl &= ~ATA_SRST; 1421 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0); 1422 1423 /* wait for link to become ready */ 1424 rc = ata_wait_after_reset(link, deadline, check_ready); 1425 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) { 1426 /* 1427 * Workaround for cases where link online status can't 1428 * be trusted. Treat device readiness timeout as link 1429 * offline. 1430 */ 1431 ata_link_info(link, "device not ready, treating as offline\n"); 1432 *class = ATA_DEV_NONE; 1433 } else if (rc) { 1434 /* link occupied, -ENODEV too is an error */ 1435 reason = "device not ready"; 1436 goto fail; 1437 } else 1438 *class = ahci_dev_classify(ap); 1439 1440 /* re-enable FBS if disabled before */ 1441 if (fbs_disabled) 1442 ahci_enable_fbs(ap); 1443 1444 DPRINTK("EXIT, class=%u\n", *class); 1445 return 0; 1446 1447 fail: 1448 ata_link_err(link, "softreset failed (%s)\n", reason); 1449 return rc; 1450 } 1451 1452 int ahci_check_ready(struct ata_link *link) 1453 { 1454 void __iomem *port_mmio = ahci_port_base(link->ap); 1455 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1456 1457 return ata_check_ready(status); 1458 } 1459 EXPORT_SYMBOL_GPL(ahci_check_ready); 1460 1461 static int ahci_softreset(struct ata_link *link, unsigned int *class, 1462 unsigned long deadline) 1463 { 1464 int pmp = sata_srst_pmp(link); 1465 1466 DPRINTK("ENTER\n"); 1467 1468 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready); 1469 } 1470 EXPORT_SYMBOL_GPL(ahci_do_softreset); 1471 1472 static int ahci_bad_pmp_check_ready(struct ata_link *link) 1473 { 1474 void __iomem *port_mmio = ahci_port_base(link->ap); 1475 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; 1476 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT); 1477 1478 /* 1479 * There is no need to check TFDATA if BAD PMP is found due to HW bug, 1480 * which can save timeout delay. 1481 */ 1482 if (irq_status & PORT_IRQ_BAD_PMP) 1483 return -EIO; 1484 1485 return ata_check_ready(status); 1486 } 1487 1488 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, 1489 unsigned long deadline) 1490 { 1491 struct ata_port *ap = link->ap; 1492 void __iomem *port_mmio = ahci_port_base(ap); 1493 int pmp = sata_srst_pmp(link); 1494 int rc; 1495 u32 irq_sts; 1496 1497 DPRINTK("ENTER\n"); 1498 1499 rc = ahci_do_softreset(link, class, pmp, deadline, 1500 ahci_bad_pmp_check_ready); 1501 1502 /* 1503 * Soft reset fails with IPMS set when PMP is enabled but 1504 * SATA HDD/ODD is connected to SATA port, do soft reset 1505 * again to port 0. 1506 */ 1507 if (rc == -EIO) { 1508 irq_sts = readl(port_mmio + PORT_IRQ_STAT); 1509 if (irq_sts & PORT_IRQ_BAD_PMP) { 1510 ata_link_warn(link, 1511 "applying PMP SRST workaround " 1512 "and retrying\n"); 1513 rc = ahci_do_softreset(link, class, 0, deadline, 1514 ahci_check_ready); 1515 } 1516 } 1517 1518 return rc; 1519 } 1520 1521 static int ahci_hardreset(struct ata_link *link, unsigned int *class, 1522 unsigned long deadline) 1523 { 1524 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 1525 struct ata_port *ap = link->ap; 1526 struct ahci_port_priv *pp = ap->private_data; 1527 struct ahci_host_priv *hpriv = ap->host->private_data; 1528 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; 1529 struct ata_taskfile tf; 1530 bool online; 1531 int rc; 1532 1533 DPRINTK("ENTER\n"); 1534 1535 ahci_stop_engine(ap); 1536 1537 /* clear D2H reception area to properly wait for D2H FIS */ 1538 ata_tf_init(link->device, &tf); 1539 tf.command = ATA_BUSY; 1540 ata_tf_to_fis(&tf, 0, 0, d2h_fis); 1541 1542 rc = sata_link_hardreset(link, timing, deadline, &online, 1543 ahci_check_ready); 1544 1545 hpriv->start_engine(ap); 1546 1547 if (online) 1548 *class = ahci_dev_classify(ap); 1549 1550 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); 1551 return rc; 1552 } 1553 1554 static void ahci_postreset(struct ata_link *link, unsigned int *class) 1555 { 1556 struct ata_port *ap = link->ap; 1557 void __iomem *port_mmio = ahci_port_base(ap); 1558 u32 new_tmp, tmp; 1559 1560 ata_std_postreset(link, class); 1561 1562 /* Make sure port's ATAPI bit is set appropriately */ 1563 new_tmp = tmp = readl(port_mmio + PORT_CMD); 1564 if (*class == ATA_DEV_ATAPI) 1565 new_tmp |= PORT_CMD_ATAPI; 1566 else 1567 new_tmp &= ~PORT_CMD_ATAPI; 1568 if (new_tmp != tmp) { 1569 writel(new_tmp, port_mmio + PORT_CMD); 1570 readl(port_mmio + PORT_CMD); /* flush */ 1571 } 1572 } 1573 1574 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) 1575 { 1576 struct scatterlist *sg; 1577 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; 1578 unsigned int si; 1579 1580 VPRINTK("ENTER\n"); 1581 1582 /* 1583 * Next, the S/G list. 1584 */ 1585 for_each_sg(qc->sg, sg, qc->n_elem, si) { 1586 dma_addr_t addr = sg_dma_address(sg); 1587 u32 sg_len = sg_dma_len(sg); 1588 1589 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff); 1590 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16); 1591 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1); 1592 } 1593 1594 return si; 1595 } 1596 1597 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc) 1598 { 1599 struct ata_port *ap = qc->ap; 1600 struct ahci_port_priv *pp = ap->private_data; 1601 1602 if (!sata_pmp_attached(ap) || pp->fbs_enabled) 1603 return ata_std_qc_defer(qc); 1604 else 1605 return sata_pmp_qc_defer_cmd_switch(qc); 1606 } 1607 1608 static void ahci_qc_prep(struct ata_queued_cmd *qc) 1609 { 1610 struct ata_port *ap = qc->ap; 1611 struct ahci_port_priv *pp = ap->private_data; 1612 int is_atapi = ata_is_atapi(qc->tf.protocol); 1613 void *cmd_tbl; 1614 u32 opts; 1615 const u32 cmd_fis_len = 5; /* five dwords */ 1616 unsigned int n_elem; 1617 1618 /* 1619 * Fill in command table information. First, the header, 1620 * a SATA Register - Host to Device command FIS. 1621 */ 1622 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ; 1623 1624 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl); 1625 if (is_atapi) { 1626 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); 1627 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); 1628 } 1629 1630 n_elem = 0; 1631 if (qc->flags & ATA_QCFLAG_DMAMAP) 1632 n_elem = ahci_fill_sg(qc, cmd_tbl); 1633 1634 /* 1635 * Fill in command slot information. 1636 */ 1637 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12); 1638 if (qc->tf.flags & ATA_TFLAG_WRITE) 1639 opts |= AHCI_CMD_WRITE; 1640 if (is_atapi) 1641 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; 1642 1643 ahci_fill_cmd_slot(pp, qc->tag, opts); 1644 } 1645 1646 static void ahci_fbs_dec_intr(struct ata_port *ap) 1647 { 1648 struct ahci_port_priv *pp = ap->private_data; 1649 void __iomem *port_mmio = ahci_port_base(ap); 1650 u32 fbs = readl(port_mmio + PORT_FBS); 1651 int retries = 3; 1652 1653 DPRINTK("ENTER\n"); 1654 BUG_ON(!pp->fbs_enabled); 1655 1656 /* time to wait for DEC is not specified by AHCI spec, 1657 * add a retry loop for safety. 1658 */ 1659 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS); 1660 fbs = readl(port_mmio + PORT_FBS); 1661 while ((fbs & PORT_FBS_DEC) && retries--) { 1662 udelay(1); 1663 fbs = readl(port_mmio + PORT_FBS); 1664 } 1665 1666 if (fbs & PORT_FBS_DEC) 1667 dev_err(ap->host->dev, "failed to clear device error\n"); 1668 } 1669 1670 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) 1671 { 1672 struct ahci_host_priv *hpriv = ap->host->private_data; 1673 struct ahci_port_priv *pp = ap->private_data; 1674 struct ata_eh_info *host_ehi = &ap->link.eh_info; 1675 struct ata_link *link = NULL; 1676 struct ata_queued_cmd *active_qc; 1677 struct ata_eh_info *active_ehi; 1678 bool fbs_need_dec = false; 1679 u32 serror; 1680 1681 /* determine active link with error */ 1682 if (pp->fbs_enabled) { 1683 void __iomem *port_mmio = ahci_port_base(ap); 1684 u32 fbs = readl(port_mmio + PORT_FBS); 1685 int pmp = fbs >> PORT_FBS_DWE_OFFSET; 1686 1687 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) { 1688 link = &ap->pmp_link[pmp]; 1689 fbs_need_dec = true; 1690 } 1691 1692 } else 1693 ata_for_each_link(link, ap, EDGE) 1694 if (ata_link_active(link)) 1695 break; 1696 1697 if (!link) 1698 link = &ap->link; 1699 1700 active_qc = ata_qc_from_tag(ap, link->active_tag); 1701 active_ehi = &link->eh_info; 1702 1703 /* record irq stat */ 1704 ata_ehi_clear_desc(host_ehi); 1705 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); 1706 1707 /* AHCI needs SError cleared; otherwise, it might lock up */ 1708 ahci_scr_read(&ap->link, SCR_ERROR, &serror); 1709 ahci_scr_write(&ap->link, SCR_ERROR, serror); 1710 host_ehi->serror |= serror; 1711 1712 /* some controllers set IRQ_IF_ERR on device errors, ignore it */ 1713 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR) 1714 irq_stat &= ~PORT_IRQ_IF_ERR; 1715 1716 if (irq_stat & PORT_IRQ_TF_ERR) { 1717 /* If qc is active, charge it; otherwise, the active 1718 * link. There's no active qc on NCQ errors. It will 1719 * be determined by EH by reading log page 10h. 1720 */ 1721 if (active_qc) 1722 active_qc->err_mask |= AC_ERR_DEV; 1723 else 1724 active_ehi->err_mask |= AC_ERR_DEV; 1725 1726 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL) 1727 host_ehi->serror &= ~SERR_INTERNAL; 1728 } 1729 1730 if (irq_stat & PORT_IRQ_UNK_FIS) { 1731 u32 *unk = pp->rx_fis + RX_FIS_UNK; 1732 1733 active_ehi->err_mask |= AC_ERR_HSM; 1734 active_ehi->action |= ATA_EH_RESET; 1735 ata_ehi_push_desc(active_ehi, 1736 "unknown FIS %08x %08x %08x %08x" , 1737 unk[0], unk[1], unk[2], unk[3]); 1738 } 1739 1740 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) { 1741 active_ehi->err_mask |= AC_ERR_HSM; 1742 active_ehi->action |= ATA_EH_RESET; 1743 ata_ehi_push_desc(active_ehi, "incorrect PMP"); 1744 } 1745 1746 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { 1747 host_ehi->err_mask |= AC_ERR_HOST_BUS; 1748 host_ehi->action |= ATA_EH_RESET; 1749 ata_ehi_push_desc(host_ehi, "host bus error"); 1750 } 1751 1752 if (irq_stat & PORT_IRQ_IF_ERR) { 1753 if (fbs_need_dec) 1754 active_ehi->err_mask |= AC_ERR_DEV; 1755 else { 1756 host_ehi->err_mask |= AC_ERR_ATA_BUS; 1757 host_ehi->action |= ATA_EH_RESET; 1758 } 1759 1760 ata_ehi_push_desc(host_ehi, "interface fatal error"); 1761 } 1762 1763 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { 1764 ata_ehi_hotplugged(host_ehi); 1765 ata_ehi_push_desc(host_ehi, "%s", 1766 irq_stat & PORT_IRQ_CONNECT ? 1767 "connection status changed" : "PHY RDY changed"); 1768 } 1769 1770 /* okay, let's hand over to EH */ 1771 1772 if (irq_stat & PORT_IRQ_FREEZE) 1773 ata_port_freeze(ap); 1774 else if (fbs_need_dec) { 1775 ata_link_abort(link); 1776 ahci_fbs_dec_intr(ap); 1777 } else 1778 ata_port_abort(ap); 1779 } 1780 1781 static void ahci_handle_port_interrupt(struct ata_port *ap, 1782 void __iomem *port_mmio, u32 status) 1783 { 1784 struct ata_eh_info *ehi = &ap->link.eh_info; 1785 struct ahci_port_priv *pp = ap->private_data; 1786 struct ahci_host_priv *hpriv = ap->host->private_data; 1787 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING); 1788 u32 qc_active = 0; 1789 int rc; 1790 1791 /* ignore BAD_PMP while resetting */ 1792 if (unlikely(resetting)) 1793 status &= ~PORT_IRQ_BAD_PMP; 1794 1795 if (sata_lpm_ignore_phy_events(&ap->link)) { 1796 status &= ~PORT_IRQ_PHYRDY; 1797 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG); 1798 } 1799 1800 if (unlikely(status & PORT_IRQ_ERROR)) { 1801 ahci_error_intr(ap, status); 1802 return; 1803 } 1804 1805 if (status & PORT_IRQ_SDB_FIS) { 1806 /* If SNotification is available, leave notification 1807 * handling to sata_async_notification(). If not, 1808 * emulate it by snooping SDB FIS RX area. 1809 * 1810 * Snooping FIS RX area is probably cheaper than 1811 * poking SNotification but some constrollers which 1812 * implement SNotification, ICH9 for example, don't 1813 * store AN SDB FIS into receive area. 1814 */ 1815 if (hpriv->cap & HOST_CAP_SNTF) 1816 sata_async_notification(ap); 1817 else { 1818 /* If the 'N' bit in word 0 of the FIS is set, 1819 * we just received asynchronous notification. 1820 * Tell libata about it. 1821 * 1822 * Lack of SNotification should not appear in 1823 * ahci 1.2, so the workaround is unnecessary 1824 * when FBS is enabled. 1825 */ 1826 if (pp->fbs_enabled) 1827 WARN_ON_ONCE(1); 1828 else { 1829 const __le32 *f = pp->rx_fis + RX_FIS_SDB; 1830 u32 f0 = le32_to_cpu(f[0]); 1831 if (f0 & (1 << 15)) 1832 sata_async_notification(ap); 1833 } 1834 } 1835 } 1836 1837 /* pp->active_link is not reliable once FBS is enabled, both 1838 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because 1839 * NCQ and non-NCQ commands may be in flight at the same time. 1840 */ 1841 if (pp->fbs_enabled) { 1842 if (ap->qc_active) { 1843 qc_active = readl(port_mmio + PORT_SCR_ACT); 1844 qc_active |= readl(port_mmio + PORT_CMD_ISSUE); 1845 } 1846 } else { 1847 /* pp->active_link is valid iff any command is in flight */ 1848 if (ap->qc_active && pp->active_link->sactive) 1849 qc_active = readl(port_mmio + PORT_SCR_ACT); 1850 else 1851 qc_active = readl(port_mmio + PORT_CMD_ISSUE); 1852 } 1853 1854 1855 rc = ata_qc_complete_multiple(ap, qc_active); 1856 1857 /* while resetting, invalid completions are expected */ 1858 if (unlikely(rc < 0 && !resetting)) { 1859 ehi->err_mask |= AC_ERR_HSM; 1860 ehi->action |= ATA_EH_RESET; 1861 ata_port_freeze(ap); 1862 } 1863 } 1864 1865 static void ahci_port_intr(struct ata_port *ap) 1866 { 1867 void __iomem *port_mmio = ahci_port_base(ap); 1868 u32 status; 1869 1870 status = readl(port_mmio + PORT_IRQ_STAT); 1871 writel(status, port_mmio + PORT_IRQ_STAT); 1872 1873 ahci_handle_port_interrupt(ap, port_mmio, status); 1874 } 1875 1876 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance) 1877 { 1878 struct ata_port *ap = dev_instance; 1879 void __iomem *port_mmio = ahci_port_base(ap); 1880 u32 status; 1881 1882 VPRINTK("ENTER\n"); 1883 1884 status = readl(port_mmio + PORT_IRQ_STAT); 1885 writel(status, port_mmio + PORT_IRQ_STAT); 1886 1887 spin_lock(ap->lock); 1888 ahci_handle_port_interrupt(ap, port_mmio, status); 1889 spin_unlock(ap->lock); 1890 1891 VPRINTK("EXIT\n"); 1892 1893 return IRQ_HANDLED; 1894 } 1895 1896 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked) 1897 { 1898 unsigned int i, handled = 0; 1899 1900 for (i = 0; i < host->n_ports; i++) { 1901 struct ata_port *ap; 1902 1903 if (!(irq_masked & (1 << i))) 1904 continue; 1905 1906 ap = host->ports[i]; 1907 if (ap) { 1908 ahci_port_intr(ap); 1909 VPRINTK("port %u\n", i); 1910 } else { 1911 VPRINTK("port %u (no irq)\n", i); 1912 if (ata_ratelimit()) 1913 dev_warn(host->dev, 1914 "interrupt on disabled port %u\n", i); 1915 } 1916 1917 handled = 1; 1918 } 1919 1920 return handled; 1921 } 1922 EXPORT_SYMBOL_GPL(ahci_handle_port_intr); 1923 1924 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance) 1925 { 1926 struct ata_host *host = dev_instance; 1927 struct ahci_host_priv *hpriv; 1928 unsigned int rc = 0; 1929 void __iomem *mmio; 1930 u32 irq_stat, irq_masked; 1931 1932 VPRINTK("ENTER\n"); 1933 1934 hpriv = host->private_data; 1935 mmio = hpriv->mmio; 1936 1937 /* sigh. 0xffffffff is a valid return from h/w */ 1938 irq_stat = readl(mmio + HOST_IRQ_STAT); 1939 if (!irq_stat) 1940 return IRQ_NONE; 1941 1942 irq_masked = irq_stat & hpriv->port_map; 1943 1944 spin_lock(&host->lock); 1945 1946 rc = ahci_handle_port_intr(host, irq_masked); 1947 1948 /* HOST_IRQ_STAT behaves as level triggered latch meaning that 1949 * it should be cleared after all the port events are cleared; 1950 * otherwise, it will raise a spurious interrupt after each 1951 * valid one. Please read section 10.6.2 of ahci 1.1 for more 1952 * information. 1953 * 1954 * Also, use the unmasked value to clear interrupt as spurious 1955 * pending event on a dummy port might cause screaming IRQ. 1956 */ 1957 writel(irq_stat, mmio + HOST_IRQ_STAT); 1958 1959 spin_unlock(&host->lock); 1960 1961 VPRINTK("EXIT\n"); 1962 1963 return IRQ_RETVAL(rc); 1964 } 1965 1966 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) 1967 { 1968 struct ata_port *ap = qc->ap; 1969 void __iomem *port_mmio = ahci_port_base(ap); 1970 struct ahci_port_priv *pp = ap->private_data; 1971 1972 /* Keep track of the currently active link. It will be used 1973 * in completion path to determine whether NCQ phase is in 1974 * progress. 1975 */ 1976 pp->active_link = qc->dev->link; 1977 1978 if (qc->tf.protocol == ATA_PROT_NCQ) 1979 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT); 1980 1981 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) { 1982 u32 fbs = readl(port_mmio + PORT_FBS); 1983 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); 1984 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET; 1985 writel(fbs, port_mmio + PORT_FBS); 1986 pp->fbs_last_dev = qc->dev->link->pmp; 1987 } 1988 1989 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE); 1990 1991 ahci_sw_activity(qc->dev->link); 1992 1993 return 0; 1994 } 1995 EXPORT_SYMBOL_GPL(ahci_qc_issue); 1996 1997 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc) 1998 { 1999 struct ahci_port_priv *pp = qc->ap->private_data; 2000 u8 *rx_fis = pp->rx_fis; 2001 2002 if (pp->fbs_enabled) 2003 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; 2004 2005 /* 2006 * After a successful execution of an ATA PIO data-in command, 2007 * the device doesn't send D2H Reg FIS to update the TF and 2008 * the host should take TF and E_Status from the preceding PIO 2009 * Setup FIS. 2010 */ 2011 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE && 2012 !(qc->flags & ATA_QCFLAG_FAILED)) { 2013 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf); 2014 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15]; 2015 } else 2016 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf); 2017 2018 return true; 2019 } 2020 2021 static void ahci_freeze(struct ata_port *ap) 2022 { 2023 void __iomem *port_mmio = ahci_port_base(ap); 2024 2025 /* turn IRQ off */ 2026 writel(0, port_mmio + PORT_IRQ_MASK); 2027 } 2028 2029 static void ahci_thaw(struct ata_port *ap) 2030 { 2031 struct ahci_host_priv *hpriv = ap->host->private_data; 2032 void __iomem *mmio = hpriv->mmio; 2033 void __iomem *port_mmio = ahci_port_base(ap); 2034 u32 tmp; 2035 struct ahci_port_priv *pp = ap->private_data; 2036 2037 /* clear IRQ */ 2038 tmp = readl(port_mmio + PORT_IRQ_STAT); 2039 writel(tmp, port_mmio + PORT_IRQ_STAT); 2040 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT); 2041 2042 /* turn IRQ back on */ 2043 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2044 } 2045 2046 void ahci_error_handler(struct ata_port *ap) 2047 { 2048 struct ahci_host_priv *hpriv = ap->host->private_data; 2049 2050 if (!(ap->pflags & ATA_PFLAG_FROZEN)) { 2051 /* restart engine */ 2052 ahci_stop_engine(ap); 2053 hpriv->start_engine(ap); 2054 } 2055 2056 sata_pmp_error_handler(ap); 2057 2058 if (!ata_dev_enabled(ap->link.device)) 2059 ahci_stop_engine(ap); 2060 } 2061 EXPORT_SYMBOL_GPL(ahci_error_handler); 2062 2063 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) 2064 { 2065 struct ata_port *ap = qc->ap; 2066 2067 /* make DMA engine forget about the failed command */ 2068 if (qc->flags & ATA_QCFLAG_FAILED) 2069 ahci_kick_engine(ap); 2070 } 2071 2072 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep) 2073 { 2074 struct ahci_host_priv *hpriv = ap->host->private_data; 2075 void __iomem *port_mmio = ahci_port_base(ap); 2076 struct ata_device *dev = ap->link.device; 2077 u32 devslp, dm, dito, mdat, deto; 2078 int rc; 2079 unsigned int err_mask; 2080 2081 devslp = readl(port_mmio + PORT_DEVSLP); 2082 if (!(devslp & PORT_DEVSLP_DSP)) { 2083 dev_info(ap->host->dev, "port does not support device sleep\n"); 2084 return; 2085 } 2086 2087 /* disable device sleep */ 2088 if (!sleep) { 2089 if (devslp & PORT_DEVSLP_ADSE) { 2090 writel(devslp & ~PORT_DEVSLP_ADSE, 2091 port_mmio + PORT_DEVSLP); 2092 err_mask = ata_dev_set_feature(dev, 2093 SETFEATURES_SATA_DISABLE, 2094 SATA_DEVSLP); 2095 if (err_mask && err_mask != AC_ERR_DEV) 2096 ata_dev_warn(dev, "failed to disable DEVSLP\n"); 2097 } 2098 return; 2099 } 2100 2101 /* device sleep was already enabled */ 2102 if (devslp & PORT_DEVSLP_ADSE) 2103 return; 2104 2105 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */ 2106 rc = ahci_stop_engine(ap); 2107 if (rc) 2108 return; 2109 2110 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET; 2111 dito = devslp_idle_timeout / (dm + 1); 2112 if (dito > 0x3ff) 2113 dito = 0x3ff; 2114 2115 /* Use the nominal value 10 ms if the read MDAT is zero, 2116 * the nominal value of DETO is 20 ms. 2117 */ 2118 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] & 2119 ATA_LOG_DEVSLP_VALID_MASK) { 2120 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] & 2121 ATA_LOG_DEVSLP_MDAT_MASK; 2122 if (!mdat) 2123 mdat = 10; 2124 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO]; 2125 if (!deto) 2126 deto = 20; 2127 } else { 2128 mdat = 10; 2129 deto = 20; 2130 } 2131 2132 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) | 2133 (mdat << PORT_DEVSLP_MDAT_OFFSET) | 2134 (deto << PORT_DEVSLP_DETO_OFFSET) | 2135 PORT_DEVSLP_ADSE); 2136 writel(devslp, port_mmio + PORT_DEVSLP); 2137 2138 hpriv->start_engine(ap); 2139 2140 /* enable device sleep feature for the drive */ 2141 err_mask = ata_dev_set_feature(dev, 2142 SETFEATURES_SATA_ENABLE, 2143 SATA_DEVSLP); 2144 if (err_mask && err_mask != AC_ERR_DEV) 2145 ata_dev_warn(dev, "failed to enable DEVSLP\n"); 2146 } 2147 2148 static void ahci_enable_fbs(struct ata_port *ap) 2149 { 2150 struct ahci_host_priv *hpriv = ap->host->private_data; 2151 struct ahci_port_priv *pp = ap->private_data; 2152 void __iomem *port_mmio = ahci_port_base(ap); 2153 u32 fbs; 2154 int rc; 2155 2156 if (!pp->fbs_supported) 2157 return; 2158 2159 fbs = readl(port_mmio + PORT_FBS); 2160 if (fbs & PORT_FBS_EN) { 2161 pp->fbs_enabled = true; 2162 pp->fbs_last_dev = -1; /* initialization */ 2163 return; 2164 } 2165 2166 rc = ahci_stop_engine(ap); 2167 if (rc) 2168 return; 2169 2170 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS); 2171 fbs = readl(port_mmio + PORT_FBS); 2172 if (fbs & PORT_FBS_EN) { 2173 dev_info(ap->host->dev, "FBS is enabled\n"); 2174 pp->fbs_enabled = true; 2175 pp->fbs_last_dev = -1; /* initialization */ 2176 } else 2177 dev_err(ap->host->dev, "Failed to enable FBS\n"); 2178 2179 hpriv->start_engine(ap); 2180 } 2181 2182 static void ahci_disable_fbs(struct ata_port *ap) 2183 { 2184 struct ahci_host_priv *hpriv = ap->host->private_data; 2185 struct ahci_port_priv *pp = ap->private_data; 2186 void __iomem *port_mmio = ahci_port_base(ap); 2187 u32 fbs; 2188 int rc; 2189 2190 if (!pp->fbs_supported) 2191 return; 2192 2193 fbs = readl(port_mmio + PORT_FBS); 2194 if ((fbs & PORT_FBS_EN) == 0) { 2195 pp->fbs_enabled = false; 2196 return; 2197 } 2198 2199 rc = ahci_stop_engine(ap); 2200 if (rc) 2201 return; 2202 2203 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS); 2204 fbs = readl(port_mmio + PORT_FBS); 2205 if (fbs & PORT_FBS_EN) 2206 dev_err(ap->host->dev, "Failed to disable FBS\n"); 2207 else { 2208 dev_info(ap->host->dev, "FBS is disabled\n"); 2209 pp->fbs_enabled = false; 2210 } 2211 2212 hpriv->start_engine(ap); 2213 } 2214 2215 static void ahci_pmp_attach(struct ata_port *ap) 2216 { 2217 void __iomem *port_mmio = ahci_port_base(ap); 2218 struct ahci_port_priv *pp = ap->private_data; 2219 u32 cmd; 2220 2221 cmd = readl(port_mmio + PORT_CMD); 2222 cmd |= PORT_CMD_PMP; 2223 writel(cmd, port_mmio + PORT_CMD); 2224 2225 ahci_enable_fbs(ap); 2226 2227 pp->intr_mask |= PORT_IRQ_BAD_PMP; 2228 2229 /* 2230 * We must not change the port interrupt mask register if the 2231 * port is marked frozen, the value in pp->intr_mask will be 2232 * restored later when the port is thawed. 2233 * 2234 * Note that during initialization, the port is marked as 2235 * frozen since the irq handler is not yet registered. 2236 */ 2237 if (!(ap->pflags & ATA_PFLAG_FROZEN)) 2238 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2239 } 2240 2241 static void ahci_pmp_detach(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 ahci_disable_fbs(ap); 2248 2249 cmd = readl(port_mmio + PORT_CMD); 2250 cmd &= ~PORT_CMD_PMP; 2251 writel(cmd, port_mmio + PORT_CMD); 2252 2253 pp->intr_mask &= ~PORT_IRQ_BAD_PMP; 2254 2255 /* see comment above in ahci_pmp_attach() */ 2256 if (!(ap->pflags & ATA_PFLAG_FROZEN)) 2257 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); 2258 } 2259 2260 int ahci_port_resume(struct ata_port *ap) 2261 { 2262 ahci_rpm_get_port(ap); 2263 2264 ahci_power_up(ap); 2265 ahci_start_port(ap); 2266 2267 if (sata_pmp_attached(ap)) 2268 ahci_pmp_attach(ap); 2269 else 2270 ahci_pmp_detach(ap); 2271 2272 return 0; 2273 } 2274 EXPORT_SYMBOL_GPL(ahci_port_resume); 2275 2276 #ifdef CONFIG_PM 2277 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) 2278 { 2279 const char *emsg = NULL; 2280 int rc; 2281 2282 rc = ahci_deinit_port(ap, &emsg); 2283 if (rc == 0) 2284 ahci_power_down(ap); 2285 else { 2286 ata_port_err(ap, "%s (%d)\n", emsg, rc); 2287 ata_port_freeze(ap); 2288 } 2289 2290 ahci_rpm_put_port(ap); 2291 return rc; 2292 } 2293 #endif 2294 2295 static int ahci_port_start(struct ata_port *ap) 2296 { 2297 struct ahci_host_priv *hpriv = ap->host->private_data; 2298 struct device *dev = ap->host->dev; 2299 struct ahci_port_priv *pp; 2300 void *mem; 2301 dma_addr_t mem_dma; 2302 size_t dma_sz, rx_fis_sz; 2303 2304 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 2305 if (!pp) 2306 return -ENOMEM; 2307 2308 if (ap->host->n_ports > 1) { 2309 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL); 2310 if (!pp->irq_desc) { 2311 devm_kfree(dev, pp); 2312 return -ENOMEM; 2313 } 2314 snprintf(pp->irq_desc, 8, 2315 "%s%d", dev_driver_string(dev), ap->port_no); 2316 } 2317 2318 /* check FBS capability */ 2319 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) { 2320 void __iomem *port_mmio = ahci_port_base(ap); 2321 u32 cmd = readl(port_mmio + PORT_CMD); 2322 if (cmd & PORT_CMD_FBSCP) 2323 pp->fbs_supported = true; 2324 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) { 2325 dev_info(dev, "port %d can do FBS, forcing FBSCP\n", 2326 ap->port_no); 2327 pp->fbs_supported = true; 2328 } else 2329 dev_warn(dev, "port %d is not capable of FBS\n", 2330 ap->port_no); 2331 } 2332 2333 if (pp->fbs_supported) { 2334 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ; 2335 rx_fis_sz = AHCI_RX_FIS_SZ * 16; 2336 } else { 2337 dma_sz = AHCI_PORT_PRIV_DMA_SZ; 2338 rx_fis_sz = AHCI_RX_FIS_SZ; 2339 } 2340 2341 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL); 2342 if (!mem) 2343 return -ENOMEM; 2344 memset(mem, 0, dma_sz); 2345 2346 /* 2347 * First item in chunk of DMA memory: 32-slot command table, 2348 * 32 bytes each in size 2349 */ 2350 pp->cmd_slot = mem; 2351 pp->cmd_slot_dma = mem_dma; 2352 2353 mem += AHCI_CMD_SLOT_SZ; 2354 mem_dma += AHCI_CMD_SLOT_SZ; 2355 2356 /* 2357 * Second item: Received-FIS area 2358 */ 2359 pp->rx_fis = mem; 2360 pp->rx_fis_dma = mem_dma; 2361 2362 mem += rx_fis_sz; 2363 mem_dma += rx_fis_sz; 2364 2365 /* 2366 * Third item: data area for storing a single command 2367 * and its scatter-gather table 2368 */ 2369 pp->cmd_tbl = mem; 2370 pp->cmd_tbl_dma = mem_dma; 2371 2372 /* 2373 * Save off initial list of interrupts to be enabled. 2374 * This could be changed later 2375 */ 2376 pp->intr_mask = DEF_PORT_IRQ; 2377 2378 /* 2379 * Switch to per-port locking in case each port has its own MSI vector. 2380 */ 2381 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { 2382 spin_lock_init(&pp->lock); 2383 ap->lock = &pp->lock; 2384 } 2385 2386 ap->private_data = pp; 2387 2388 /* engage engines, captain */ 2389 return ahci_port_resume(ap); 2390 } 2391 2392 static void ahci_port_stop(struct ata_port *ap) 2393 { 2394 const char *emsg = NULL; 2395 int rc; 2396 2397 /* de-initialize port */ 2398 rc = ahci_deinit_port(ap, &emsg); 2399 if (rc) 2400 ata_port_warn(ap, "%s (%d)\n", emsg, rc); 2401 } 2402 2403 void ahci_print_info(struct ata_host *host, const char *scc_s) 2404 { 2405 struct ahci_host_priv *hpriv = host->private_data; 2406 u32 vers, cap, cap2, impl, speed; 2407 const char *speed_s; 2408 2409 vers = hpriv->version; 2410 cap = hpriv->cap; 2411 cap2 = hpriv->cap2; 2412 impl = hpriv->port_map; 2413 2414 speed = (cap >> 20) & 0xf; 2415 if (speed == 1) 2416 speed_s = "1.5"; 2417 else if (speed == 2) 2418 speed_s = "3"; 2419 else if (speed == 3) 2420 speed_s = "6"; 2421 else 2422 speed_s = "?"; 2423 2424 dev_info(host->dev, 2425 "AHCI %02x%02x.%02x%02x " 2426 "%u slots %u ports %s Gbps 0x%x impl %s mode\n" 2427 , 2428 2429 (vers >> 24) & 0xff, 2430 (vers >> 16) & 0xff, 2431 (vers >> 8) & 0xff, 2432 vers & 0xff, 2433 2434 ((cap >> 8) & 0x1f) + 1, 2435 (cap & 0x1f) + 1, 2436 speed_s, 2437 impl, 2438 scc_s); 2439 2440 dev_info(host->dev, 2441 "flags: " 2442 "%s%s%s%s%s%s%s" 2443 "%s%s%s%s%s%s%s" 2444 "%s%s%s%s%s%s%s" 2445 "%s%s\n" 2446 , 2447 2448 cap & HOST_CAP_64 ? "64bit " : "", 2449 cap & HOST_CAP_NCQ ? "ncq " : "", 2450 cap & HOST_CAP_SNTF ? "sntf " : "", 2451 cap & HOST_CAP_MPS ? "ilck " : "", 2452 cap & HOST_CAP_SSS ? "stag " : "", 2453 cap & HOST_CAP_ALPM ? "pm " : "", 2454 cap & HOST_CAP_LED ? "led " : "", 2455 cap & HOST_CAP_CLO ? "clo " : "", 2456 cap & HOST_CAP_ONLY ? "only " : "", 2457 cap & HOST_CAP_PMP ? "pmp " : "", 2458 cap & HOST_CAP_FBS ? "fbs " : "", 2459 cap & HOST_CAP_PIO_MULTI ? "pio " : "", 2460 cap & HOST_CAP_SSC ? "slum " : "", 2461 cap & HOST_CAP_PART ? "part " : "", 2462 cap & HOST_CAP_CCC ? "ccc " : "", 2463 cap & HOST_CAP_EMS ? "ems " : "", 2464 cap & HOST_CAP_SXS ? "sxs " : "", 2465 cap2 & HOST_CAP2_DESO ? "deso " : "", 2466 cap2 & HOST_CAP2_SADM ? "sadm " : "", 2467 cap2 & HOST_CAP2_SDS ? "sds " : "", 2468 cap2 & HOST_CAP2_APST ? "apst " : "", 2469 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "", 2470 cap2 & HOST_CAP2_BOH ? "boh " : "" 2471 ); 2472 } 2473 EXPORT_SYMBOL_GPL(ahci_print_info); 2474 2475 void ahci_set_em_messages(struct ahci_host_priv *hpriv, 2476 struct ata_port_info *pi) 2477 { 2478 u8 messages; 2479 void __iomem *mmio = hpriv->mmio; 2480 u32 em_loc = readl(mmio + HOST_EM_LOC); 2481 u32 em_ctl = readl(mmio + HOST_EM_CTL); 2482 2483 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS)) 2484 return; 2485 2486 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16; 2487 2488 if (messages) { 2489 /* store em_loc */ 2490 hpriv->em_loc = ((em_loc >> 16) * 4); 2491 hpriv->em_buf_sz = ((em_loc & 0xff) * 4); 2492 hpriv->em_msg_type = messages; 2493 pi->flags |= ATA_FLAG_EM; 2494 if (!(em_ctl & EM_CTL_ALHD)) 2495 pi->flags |= ATA_FLAG_SW_ACTIVITY; 2496 } 2497 } 2498 EXPORT_SYMBOL_GPL(ahci_set_em_messages); 2499 2500 static int ahci_host_activate_multi_irqs(struct ata_host *host, 2501 struct scsi_host_template *sht) 2502 { 2503 struct ahci_host_priv *hpriv = host->private_data; 2504 int i, rc; 2505 2506 rc = ata_host_start(host); 2507 if (rc) 2508 return rc; 2509 /* 2510 * Requests IRQs according to AHCI-1.1 when multiple MSIs were 2511 * allocated. That is one MSI per port, starting from @irq. 2512 */ 2513 for (i = 0; i < host->n_ports; i++) { 2514 struct ahci_port_priv *pp = host->ports[i]->private_data; 2515 int irq = ahci_irq_vector(hpriv, i); 2516 2517 /* Do not receive interrupts sent by dummy ports */ 2518 if (!pp) { 2519 disable_irq(irq + i); 2520 continue; 2521 } 2522 2523 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard, 2524 0, pp->irq_desc, host->ports[i]); 2525 2526 if (rc) 2527 return rc; 2528 ata_port_desc(host->ports[i], "irq %d", irq); 2529 } 2530 2531 return ata_host_register(host, sht); 2532 } 2533 2534 /** 2535 * ahci_host_activate - start AHCI host, request IRQs and register it 2536 * @host: target ATA host 2537 * @sht: scsi_host_template to use when registering the host 2538 * 2539 * LOCKING: 2540 * Inherited from calling layer (may sleep). 2541 * 2542 * RETURNS: 2543 * 0 on success, -errno otherwise. 2544 */ 2545 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht) 2546 { 2547 struct ahci_host_priv *hpriv = host->private_data; 2548 int irq = hpriv->irq; 2549 int rc; 2550 2551 if (hpriv->flags & (AHCI_HFLAG_MULTI_MSI | AHCI_HFLAG_MULTI_MSIX)) { 2552 if (hpriv->irq_handler) 2553 dev_warn(host->dev, 2554 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n"); 2555 2556 rc = ahci_host_activate_multi_irqs(host, sht); 2557 } else { 2558 rc = ata_host_activate(host, irq, hpriv->irq_handler, 2559 IRQF_SHARED, sht); 2560 } 2561 2562 2563 return rc; 2564 } 2565 EXPORT_SYMBOL_GPL(ahci_host_activate); 2566 2567 MODULE_AUTHOR("Jeff Garzik"); 2568 MODULE_DESCRIPTION("Common AHCI SATA low-level routines"); 2569 MODULE_LICENSE("GPL"); 2570