1 /* 2 * Copyright (c) 2009 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "ahci.h" 36 37 static void ahci_pm_dummy_done(struct ata_xfer *xa); 38 39 int 40 ahci_pm_port_init(struct ahci_port *ap, struct ata_port *at) 41 { 42 at->at_probe = ATA_PROBE_NEED_HARD_RESET; 43 return (0); 44 } 45 46 /* 47 * AHCI port multiplier probe. This routine is run by the hardreset code 48 * if it gets past the device detect, whether or not BSY is found to be 49 * stuck. 50 * 51 * We MUST use CLO to properly probe whether the port multiplier exists 52 * or not. 53 * 54 * Return 0 on success, non-zero on failure. 55 */ 56 int 57 ahci_pm_port_probe(struct ahci_port *ap, int orig_error) 58 { 59 struct ahci_cmd_hdr *cmd_slot; 60 struct ata_port *at; 61 struct ahci_ccb *ccb = NULL; 62 u_int8_t *fis = NULL; 63 int error; 64 u_int32_t cmd; 65 int count; 66 int i; 67 68 count = 2; 69 retry: 70 /* 71 * This code is only called from hardreset, which does not 72 * high level command processing. The port should be stopped. 73 * 74 * Set PMA mode while the port is stopped. 75 * 76 * NOTE: On retry the port might be running, stopped, or failed. 77 */ 78 ahci_port_stop(ap, 0); 79 ap->ap_state = AP_S_NORMAL; 80 cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; 81 if ((cmd & AHCI_PREG_CMD_PMA) == 0) { 82 cmd |= AHCI_PREG_CMD_PMA; 83 ahci_pwrite(ap, AHCI_PREG_CMD, cmd); 84 } 85 86 /* 87 * Flush any errors and request CLO unconditionally, then start 88 * the port. 89 */ 90 ahci_flush_tfd(ap); 91 ahci_port_clo(ap); 92 if (ahci_port_start(ap)) { 93 kprintf("%s: PMPROBE failed to start port, cannot softreset\n", 94 PORTNAME(ap)); 95 error = EIO; 96 goto err; 97 } 98 99 /* 100 * Check whether CLO worked 101 */ 102 if (ahci_pwait_clr(ap, AHCI_PREG_TFD, 103 AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { 104 kprintf("%s: PMPROBE CLO %s, need port reset\n", 105 PORTNAME(ap), 106 (ahci_read(ap->ap_sc, AHCI_REG_CAP) & AHCI_REG_CAP_SCLO) 107 ? "failed" : "unsupported"); 108 error = EBUSY; 109 goto err; 110 } 111 112 /* 113 * Use the error CCB for all commands 114 * 115 * NOTE! This CCB is used for both the first and second commands. 116 * The second command must use CCB slot 1 to properly load 117 * the signature. 118 */ 119 ccb = ahci_get_err_ccb(ap); 120 ccb->ccb_xa.flags = ATA_F_POLL; 121 ccb->ccb_xa.complete = ahci_pm_dummy_done; 122 ccb->ccb_xa.at = &ap->ap_ata[15]; 123 cmd_slot = ccb->ccb_cmd_hdr; 124 KKASSERT(ccb->ccb_slot == 1); 125 126 /* 127 * Prep the first H2D command with SRST feature & clear busy/reset 128 * flags. 129 */ 130 fis = ccb->ccb_cmd_table->cfis; 131 bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); 132 fis[0] = ATA_FIS_TYPE_H2D; 133 fis[1] = 0x0F; /* Target 15 */ 134 fis[15] = ATA_FIS_CONTROL_SRST | ATA_FIS_CONTROL_4BIT; 135 136 cmd_slot->prdtl = 0; 137 cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ 138 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_C); /* Clear busy on OK */ 139 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_R); /* Reset */ 140 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_PMP); /* port 0xF */ 141 142 ccb->ccb_xa.state = ATA_S_PENDING; 143 144 if (ahci_poll(ccb, 1000, ahci_quick_timeout) != ATA_S_COMPLETE) { 145 kprintf("%s: PMPROBE First FIS failed\n", PORTNAME(ap)); 146 if (--count) { 147 ahci_put_err_ccb(ccb); 148 goto retry; 149 } 150 error = EBUSY; 151 goto err; 152 } 153 if (ahci_pwait_clr(ap, AHCI_PREG_TFD, 154 AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { 155 kprintf("%s: PMPROBE Busy after first FIS\n", PORTNAME(ap)); 156 } 157 158 /* 159 * The device may have muffed up the PHY when it reset. 160 */ 161 ahci_os_sleep(100); 162 ahci_flush_tfd(ap); 163 ahci_pwrite(ap, AHCI_PREG_SERR, -1); 164 /* ahci_pm_phy_status(ap, 15, &cmd); */ 165 166 /* 167 * Prep second D2H command to read status and complete reset sequence 168 * AHCI 10.4.1 and "Serial ATA Revision 2.6". I can't find the ATA 169 * Rev 2.6 and it is unclear how the second FIS should be set up 170 * from the AHCI document. 171 * 172 * Give the device 3ms before sending the second FIS. 173 * 174 * It is unclear which other fields in the FIS are used. Just zero 175 * everything. 176 */ 177 ccb->ccb_xa.flags = ATA_F_POLL; 178 179 bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); 180 fis[0] = ATA_FIS_TYPE_H2D; 181 fis[1] = 0x0F; 182 fis[15] = ATA_FIS_CONTROL_4BIT; 183 184 cmd_slot->prdtl = 0; 185 cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ 186 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_PMP); /* port 0xF */ 187 188 ccb->ccb_xa.state = ATA_S_PENDING; 189 190 if (ahci_poll(ccb, 5000, ahci_quick_timeout) != ATA_S_COMPLETE) { 191 kprintf("%s: PMPROBE Second FIS failed\n", PORTNAME(ap)); 192 if (--count) { 193 ahci_put_err_ccb(ccb); 194 goto retry; 195 } 196 error = EBUSY; 197 goto err; 198 } 199 200 /* 201 * What? We succeeded? Yup, but for some reason the signature 202 * is still latched from the original detect (that saw target 0 203 * behind the PM), and I don't know how to clear the condition 204 * other then by retrying the whole reset sequence. 205 */ 206 if (--count) { 207 fis[15] = 0; 208 ahci_put_err_ccb(ccb); 209 goto retry; 210 } 211 212 /* 213 * Get the signature. The caller sets the ap fields. 214 */ 215 if (ahci_port_signature_detect(ap, NULL) == ATA_PORT_T_PM) { 216 ap->ap_ata[15].at_probe = ATA_PROBE_GOOD; 217 error = 0; 218 } else { 219 error = EBUSY; 220 } 221 222 /* 223 * Fall through / clean up the CCB and perform error processing. 224 */ 225 err: 226 if (ccb != NULL) 227 ahci_put_err_ccb(ccb); 228 229 if (error == 0 && ahci_pm_identify(ap)) { 230 kprintf("%s: PM - cannot identify port multiplier\n", 231 PORTNAME(ap)); 232 error = EBUSY; 233 } 234 235 /* 236 * If we probed the PM reset the state for the targets behind 237 * it so they get probed by the state machine. 238 */ 239 if (error == 0) { 240 for (i = 0; i < AHCI_MAX_PMPORTS; ++i) { 241 at = &ap->ap_ata[i]; 242 at->at_probe = ATA_PROBE_NEED_INIT; 243 at->at_features |= ATA_PORT_F_RESCAN; 244 } 245 ap->ap_type = ATA_PORT_T_PM; 246 return (0); 247 } 248 249 /* 250 * If we failed turn off PMA, otherwise identify the port multiplier. 251 * CAM will iterate the devices. 252 */ 253 ahci_port_stop(ap, 0); 254 ahci_port_clo(ap); 255 cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; 256 cmd &= ~AHCI_PREG_CMD_PMA; 257 ahci_pwrite(ap, AHCI_PREG_CMD, cmd); 258 ahci_port_init(ap); 259 if (orig_error == 0) { 260 if (ahci_pwait_clr(ap, AHCI_PREG_TFD, 261 AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { 262 kprintf("%s: PM probe: port will not come ready\n", 263 PORTNAME(ap)); 264 orig_error = EBUSY; 265 } 266 } 267 return(orig_error); 268 } 269 270 /* 271 * Identify the port multiplier 272 */ 273 int 274 ahci_pm_identify(struct ahci_port *ap) 275 { 276 u_int32_t chipid; 277 u_int32_t rev; 278 u_int32_t nports; 279 u_int32_t data1; 280 u_int32_t data2; 281 282 ap->ap_probe = ATA_PROBE_FAILED; 283 if (ahci_pm_read(ap, 15, 0, &chipid)) 284 goto err; 285 if (ahci_pm_read(ap, 15, 1, &rev)) 286 goto err; 287 if (ahci_pm_read(ap, 15, 2, &nports)) 288 goto err; 289 nports &= 0x0000000F; /* only the low 4 bits */ 290 ap->ap_probe = ATA_PROBE_GOOD; 291 kprintf("%s: Port multiplier: chip=%08x rev=0x%b nports=%d\n", 292 PORTNAME(ap), 293 chipid, 294 rev, SATA_PFMT_PM_REV, 295 nports); 296 ap->ap_pmcount = nports; 297 298 if (ahci_pm_read(ap, 15, SATA_PMREG_FEA, &data1)) { 299 kprintf("%s: Port multiplier: Warning, " 300 "cannot read feature register\n", PORTNAME(ap)); 301 } else { 302 kprintf("%s: Port multiplier features: 0x%b\n", 303 PORTNAME(ap), 304 data1, 305 SATA_PFMT_PM_FEA); 306 } 307 if (ahci_pm_read(ap, 15, SATA_PMREG_FEAEN, &data2) == 0) { 308 kprintf("%s: Port multiplier defaults: 0x%b\n", 309 PORTNAME(ap), 310 data2, 311 SATA_PFMT_PM_FEA); 312 } 313 314 /* 315 * Turn on async notification if we support and the PM supports it. 316 * This allows the PM to forward async notification events to us and 317 * it will also generate an event for target 15 for hot-plug events 318 * (or is supposed to anyway). 319 */ 320 if ((ap->ap_sc->sc_cap & AHCI_REG_CAP_SSNTF) && 321 (data1 & SATA_PMFEA_ASYNCNOTIFY)) { 322 u_int32_t serr_bits = AHCI_PREG_SERR_DIAG_N | 323 AHCI_PREG_SERR_DIAG_X; 324 data2 |= SATA_PMFEA_ASYNCNOTIFY; 325 if (ahci_pm_write(ap, 15, SATA_PMREG_FEAEN, data2)) { 326 kprintf("%s: Port multiplier: AsyncNotify cannot be " 327 "enabled\n", PORTNAME(ap)); 328 } else if (ahci_pm_write(ap, 15, SATA_PMREG_EEENA, serr_bits)) { 329 kprintf("%s: Port mulltiplier: AsyncNotify unable " 330 "to enable error info bits\n", PORTNAME(ap)); 331 } else { 332 kprintf("%s: Port multiplier: AsyncNotify enabled\n", 333 PORTNAME(ap)); 334 } 335 } 336 337 return (0); 338 err: 339 kprintf("%s: Port multiplier cannot be identified\n", PORTNAME(ap)); 340 return (EIO); 341 } 342 343 /* 344 * Do a COMRESET sequence on the target behind a port multiplier. 345 * 346 * If hard is 2 we also cycle the phy on the target. 347 * 348 * This must be done prior to any softreset or probe attempts on 349 * targets behind the port multiplier. 350 * 351 * Returns 0 on success or an error. 352 */ 353 int 354 ahci_pm_hardreset(struct ahci_port *ap, int target, int hard) 355 { 356 struct ata_port *at; 357 u_int32_t data; 358 int loop; 359 int error = EIO; 360 361 at = &ap->ap_ata[target]; 362 363 /* 364 * Turn off power management and kill the phy on the target 365 * if requested. Hold state for 10ms. 366 */ 367 data = AHCI_PREG_SCTL_IPM_DISABLED; 368 if (hard == 2) 369 data |= AHCI_PREG_SCTL_DET_DISABLE; 370 if (ahci_pm_write(ap, target, SATA_PMREG_SERR, -1)) 371 goto err; 372 if (ahci_pm_write(ap, target, SATA_PMREG_SCTL, data)) 373 goto err; 374 ahci_os_sleep(10); 375 376 /* 377 * Start transmitting COMRESET. COMRESET must be sent for at 378 * least 1ms. 379 */ 380 at->at_probe = ATA_PROBE_FAILED; 381 at->at_type = ATA_PORT_T_NONE; 382 data = AHCI_PREG_SCTL_IPM_DISABLED | AHCI_PREG_SCTL_DET_INIT; 383 if (AhciForceGen1 & (1 << ap->ap_num)) { 384 kprintf("%s.%d: Force 1.5GBits\n", PORTNAME(ap), target); 385 data |= AHCI_PREG_SCTL_SPD_GEN1; 386 } else { 387 data |= AHCI_PREG_SCTL_SPD_ANY; 388 } 389 if (ahci_pm_write(ap, target, SATA_PMREG_SCTL, data)) 390 goto err; 391 392 /* 393 * It takes about 100ms for the DET logic to settle down, 394 * from trial and error testing. If this is too short 395 * the softreset code will fail. 396 */ 397 ahci_os_sleep(100); 398 399 if (ahci_pm_phy_status(ap, target, &data)) { 400 kprintf("%s: (A)Cannot clear phy status\n", 401 ATANAME(ap ,at)); 402 } 403 404 /* 405 * Flush any status, then clear DET to initiate negotiation. 406 */ 407 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 408 data = AHCI_PREG_SCTL_IPM_DISABLED | AHCI_PREG_SCTL_DET_NONE; 409 if (ahci_pm_write(ap, target, SATA_PMREG_SCTL, data)) 410 goto err; 411 412 /* 413 * Try to determine if there is a device on the port. 414 * 415 * Give the device 3/10 second to at least be detected. 416 * If we fail clear any pending status since we may have 417 * cycled the phy and probably caused another PRCS interrupt. 418 */ 419 for (loop = 3; loop; --loop) { 420 if (ahci_pm_read(ap, target, SATA_PMREG_SSTS, &data)) 421 goto err; 422 if (data & AHCI_PREG_SSTS_DET) 423 break; 424 ahci_os_sleep(100); 425 } 426 if (loop == 0) { 427 kprintf("%s.%d: Port appears to be unplugged\n", 428 PORTNAME(ap), target); 429 error = ENODEV; 430 goto err; 431 } 432 433 /* 434 * There is something on the port. Give the device 3 seconds 435 * to fully negotiate. 436 */ 437 for (loop = 30; loop; --loop) { 438 if (ahci_pm_read(ap, target, SATA_PMREG_SSTS, &data)) 439 goto err; 440 if ((data & AHCI_PREG_SSTS_DET) == AHCI_PREG_SSTS_DET_DEV) 441 break; 442 ahci_os_sleep(100); 443 } 444 445 /* 446 * Device not detected 447 */ 448 if (loop == 0) { 449 kprintf("%s: Device may be powered down\n", 450 PORTNAME(ap)); 451 error = ENODEV; 452 goto err; 453 } 454 455 /* 456 * Device detected 457 */ 458 kprintf("%s.%d: Device detected data=%08x\n", 459 PORTNAME(ap), target, data); 460 /* 461 * Clear SERR on the target so we get a new NOTIFY event if a hot-plug 462 * or hot-unplug occurs. 463 */ 464 ahci_os_sleep(100); 465 466 error = 0; 467 err: 468 at->at_probe = error ? ATA_PROBE_FAILED : ATA_PROBE_NEED_SOFT_RESET; 469 return (error); 470 } 471 472 /* 473 * AHCI soft reset through port multiplier. 474 * 475 * This function keeps port communications intact and attempts to generate 476 * a reset to the connected device using device commands. Unlike 477 * hard-port operations we can't do fancy stop/starts or stuff like 478 * that without messing up other commands that might be running or 479 * queued. 480 */ 481 int 482 ahci_pm_softreset(struct ahci_port *ap, int target) 483 { 484 struct ata_port *at; 485 struct ahci_ccb *ccb; 486 struct ahci_cmd_hdr *cmd_slot; 487 u_int8_t *fis; 488 int count; 489 int error; 490 u_int32_t data; 491 int tried_longer; 492 493 error = EIO; 494 at = &ap->ap_ata[target]; 495 496 DPRINTF(AHCI_D_VERBOSE, "%s: soft reset\n", PORTNAME(ap)); 497 498 count = 2; 499 tried_longer = 0; 500 retry: 501 /* 502 * Try to clear the phy so we get a good signature, otherwise 503 * the PM may not latch a new signature. 504 * 505 * NOTE: This cannot be safely done between the first and second 506 * softreset FISs. It's now or never. 507 */ 508 #if 1 509 if (ahci_pm_phy_status(ap, target, &data)) { 510 kprintf("%s: (B)Cannot clear phy status\n", 511 ATANAME(ap ,at)); 512 } 513 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 514 #endif 515 516 /* 517 * Prep first D2H command with SRST feature & clear busy/reset flags 518 * 519 * It is unclear which other fields in the FIS are used. Just zero 520 * everything. 521 * 522 * When soft-resetting a port behind a multiplier at will be 523 * non-NULL, assigning it to the ccb prevents the port interrupt 524 * from hard-resetting the port if a problem crops up. 525 */ 526 ccb = ahci_get_err_ccb(ap); 527 ccb->ccb_xa.flags = ATA_F_POLL | ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE; 528 ccb->ccb_xa.complete = ahci_pm_dummy_done; 529 ccb->ccb_xa.at = at; 530 531 fis = ccb->ccb_cmd_table->cfis; 532 bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); 533 fis[0] = ATA_FIS_TYPE_H2D; 534 fis[1] = at->at_target; 535 fis[15] = ATA_FIS_CONTROL_SRST|ATA_FIS_CONTROL_4BIT; 536 537 cmd_slot = ccb->ccb_cmd_hdr; 538 cmd_slot->prdtl = 0; 539 cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ 540 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_C); /* Clear busy on OK */ 541 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_R); /* Reset */ 542 cmd_slot->flags |= htole16(at->at_target << 543 AHCI_CMD_LIST_FLAG_PMP_SHIFT); 544 545 ccb->ccb_xa.state = ATA_S_PENDING; 546 547 /* 548 * XXX hack to ignore IFS errors which can occur during the target 549 * device's reset. 550 * 551 * If an IFS error occurs the target is probably powering up, 552 * so we try for a longer period of time. 553 */ 554 ap->ap_flags |= AP_F_IGNORE_IFS; 555 ap->ap_flags &= ~(AP_F_IFS_IGNORED | AP_F_IFS_OCCURED); 556 557 if (ahci_poll(ccb, 1000, ahci_ata_cmd_timeout) != ATA_S_COMPLETE) { 558 kprintf("%s: (PM) First FIS failed\n", ATANAME(ap, at)); 559 if (ap->ap_flags & AP_F_IFS_OCCURED) { 560 if (tried_longer == 0) 561 count += 4; 562 ++tried_longer; 563 } 564 ahci_put_err_ccb(ccb); 565 if (--count) 566 goto retry; 567 goto err; 568 } 569 570 /* 571 * WARNING! SENSITIVE TIME PERIOD! WARNING! 572 * 573 * The first and second FISes are supposed to be back-to-back, 574 * I think the idea is to get the second sent and then after 575 * the device resets it will send a signature. Do not delay 576 * here and most definitely do not issue any commands to other 577 * targets! 578 */ 579 580 /* 581 * Prep second D2H command to read status and complete reset sequence 582 * AHCI 10.4.1 and "Serial ATA Revision 2.6". I can't find the ATA 583 * Rev 2.6 and it is unclear how the second FIS should be set up 584 * from the AHCI document. 585 * 586 * Give the device 3ms before sending the second FIS. 587 * 588 * It is unclear which other fields in the FIS are used. Just zero 589 * everything. 590 */ 591 bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); 592 fis[0] = ATA_FIS_TYPE_H2D; 593 fis[1] = at->at_target; 594 fis[15] = ATA_FIS_CONTROL_4BIT; 595 596 cmd_slot->prdtl = 0; 597 cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ 598 cmd_slot->flags |= htole16(at->at_target << 599 AHCI_CMD_LIST_FLAG_PMP_SHIFT); 600 601 ccb->ccb_xa.state = ATA_S_PENDING; 602 ccb->ccb_xa.flags = ATA_F_POLL | ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE; 603 604 if (ahci_poll(ccb, 1000, ahci_ata_cmd_timeout) != ATA_S_COMPLETE) { 605 kprintf("%s: (PM) Second FIS failed\n", ATANAME(ap, at)); 606 ahci_put_err_ccb(ccb); 607 #if 1 608 if (--count) 609 goto retry; 610 #endif 611 goto err; 612 } 613 614 ahci_put_err_ccb(ccb); 615 ahci_os_sleep(100); 616 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 617 if (ahci_pm_phy_status(ap, target, &data)) { 618 kprintf("%s: (C)Cannot clear phy status\n", 619 ATANAME(ap ,at)); 620 } 621 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 622 623 /* 624 * Do it again, even if we think we got a good result 625 */ 626 if (--count) { 627 fis[15] = 0; 628 goto retry; 629 } 630 631 /* 632 * If the softreset is trying to clear a BSY condition after a 633 * normal portreset we assign the port type. 634 * 635 * If the softreset is being run first as part of the ccb error 636 * processing code then report if the device signature changed 637 * unexpectedly. 638 */ 639 if (at->at_type == ATA_PORT_T_NONE) { 640 at->at_type = ahci_port_signature_detect(ap, at); 641 } else { 642 if (ahci_port_signature_detect(ap, at) != at->at_type) { 643 kprintf("%s: device signature unexpectedly " 644 "changed\n", ATANAME(ap, at)); 645 error = EBUSY; /* XXX */ 646 } 647 } 648 error = 0; 649 650 /* 651 * Who knows what kind of mess occured. We have exclusive access 652 * to the port so try to clean up potential problems. 653 */ 654 ahci_os_sleep(100); 655 err: 656 /* 657 * Clear error status so we can detect removal. 658 */ 659 if (ahci_pm_write(ap, target, SATA_PMREG_SERR, -1)) { 660 kprintf("%s: ahci_pm_softreset unable to clear SERR\n", 661 ATANAME(ap, at)); 662 ap->ap_flags &= ~AP_F_IGNORE_IFS; 663 } 664 /* ahci_pwrite(ap, AHCI_PREG_SERR, -1);*/ 665 666 at->at_probe = error ? ATA_PROBE_FAILED : ATA_PROBE_NEED_IDENT; 667 return (error); 668 } 669 670 671 /* 672 * Return the phy status for a target behind a port multiplier and 673 * reset SATA_PMREG_SERR. 674 * 675 * Returned bits follow AHCI_PREG_SSTS bits. The AHCI_PREG_SSTS_SPD 676 * bits can be used to determine the link speed and will be 0 if there 677 * is no link. 678 * 679 * 0 is returned if any communications error occurs. 680 */ 681 int 682 ahci_pm_phy_status(struct ahci_port *ap, int target, u_int32_t *datap) 683 { 684 int error; 685 686 error = ahci_pm_read(ap, target, SATA_PMREG_SSTS, datap); 687 if (error == 0) 688 error = ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 689 if (error) 690 *datap = 0; 691 return(error); 692 } 693 694 int 695 ahci_pm_set_feature(struct ahci_port *ap, int feature, int enable) 696 { 697 struct ata_xfer *xa; 698 int error; 699 700 xa = ahci_ata_get_xfer(ap, &ap->ap_ata[15]); 701 702 xa->fis->type = ATA_FIS_TYPE_H2D; 703 xa->fis->flags = ATA_H2D_FLAGS_CMD | 15; 704 xa->fis->command = enable ? ATA_C_SATA_FEATURE_ENA : 705 ATA_C_SATA_FEATURE_DIS; 706 xa->fis->sector_count = feature; 707 xa->fis->control = ATA_FIS_CONTROL_4BIT; 708 709 xa->complete = ahci_pm_dummy_done; 710 xa->datalen = 0; 711 xa->flags = ATA_F_POLL; 712 xa->timeout = 1000; 713 714 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) 715 error = 0; 716 else 717 error = EIO; 718 ahci_ata_put_xfer(xa); 719 return(error); 720 } 721 722 /* 723 * Check that a target is still good. 724 */ 725 void 726 ahci_pm_check_good(struct ahci_port *ap, int target) 727 { 728 struct ata_port *at; 729 u_int32_t data; 730 731 /* 732 * It looks like we might have to read the EINFO register 733 * to allow the PM to generate a new event. 734 */ 735 if (ahci_pm_read(ap, 15, SATA_PMREG_EINFO, &data)) { 736 kprintf("%s: Port multiplier EINFO could not be read\n", 737 PORTNAME(ap)); 738 } 739 740 if (ahci_pm_write(ap, target, SATA_PMREG_SERR, -1)) { 741 kprintf("%s: Port multiplier: SERR could not be cleared\n", 742 PORTNAME(ap)); 743 } 744 745 if (target == CAM_TARGET_WILDCARD || target >= ap->ap_pmcount) 746 return; 747 at = &ap->ap_ata[target]; 748 749 /* 750 * If the device needs an init or hard reset also make sure the 751 * PHY is turned on. 752 */ 753 if (at->at_probe <= ATA_PROBE_NEED_HARD_RESET) { 754 /*kprintf("%s DOHARD\n", ATANAME(ap, at));*/ 755 ahci_pm_hardreset(ap, target, 1); 756 } 757 758 /* 759 * Read the detect status 760 */ 761 if (ahci_pm_read(ap, target, SATA_PMREG_SSTS, &data)) { 762 kprintf("%s: Unable to access PM SSTS register target %d\n", 763 PORTNAME(ap), target); 764 return; 765 } 766 if ((data & AHCI_PREG_SSTS_DET) != AHCI_PREG_SSTS_DET_DEV) { 767 /*kprintf("%s: DETECT %08x\n", ATANAME(ap, at), data);*/ 768 if (at->at_probe != ATA_PROBE_FAILED) { 769 at->at_probe = ATA_PROBE_FAILED; 770 at->at_type = ATA_PORT_T_NONE; 771 at->at_features |= ATA_PORT_F_RESCAN; 772 kprintf("%s: HOTPLUG (PM) - Device removed\n", 773 ATANAME(ap, at)); 774 } 775 } else { 776 if (at->at_probe == ATA_PROBE_FAILED) { 777 at->at_probe = ATA_PROBE_NEED_HARD_RESET; 778 at->at_features |= ATA_PORT_F_RESCAN; 779 kprintf("%s: HOTPLUG (PM) - Device inserted\n", 780 ATANAME(ap, at)); 781 } 782 } 783 } 784 785 /* 786 * Read a PM register 787 */ 788 int 789 ahci_pm_read(struct ahci_port *ap, int target, int which, u_int32_t *datap) 790 { 791 struct ata_xfer *xa; 792 int error; 793 794 xa = ahci_ata_get_xfer(ap, &ap->ap_ata[15]); 795 796 xa->fis->type = ATA_FIS_TYPE_H2D; 797 xa->fis->flags = ATA_H2D_FLAGS_CMD | 15; 798 xa->fis->command = ATA_C_READ_PM; 799 xa->fis->features = which; 800 xa->fis->device = target | ATA_H2D_DEVICE_LBA; 801 xa->fis->control = ATA_FIS_CONTROL_4BIT; 802 803 xa->complete = ahci_pm_dummy_done; 804 xa->datalen = 0; 805 xa->flags = ATA_F_POLL | ATA_F_AUTOSENSE; 806 xa->timeout = 1000; 807 808 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) { 809 *datap = xa->rfis.sector_count | (xa->rfis.lba_low << 8) | 810 (xa->rfis.lba_mid << 16) | (xa->rfis.lba_high << 24); 811 error = 0; 812 } else { 813 kprintf("%s.%d pm_read SCA[%d] failed\n", 814 PORTNAME(ap), target, which); 815 *datap = 0; 816 error = EIO; 817 } 818 ahci_ata_put_xfer(xa); 819 return (error); 820 } 821 822 /* 823 * Write a PM register 824 */ 825 int 826 ahci_pm_write(struct ahci_port *ap, int target, int which, u_int32_t data) 827 { 828 struct ata_xfer *xa; 829 int error; 830 831 xa = ahci_ata_get_xfer(ap, &ap->ap_ata[15]); 832 833 xa->fis->type = ATA_FIS_TYPE_H2D; 834 xa->fis->flags = ATA_H2D_FLAGS_CMD | 15; 835 xa->fis->command = ATA_C_WRITE_PM; 836 xa->fis->features = which; 837 xa->fis->device = target | ATA_H2D_DEVICE_LBA; 838 xa->fis->sector_count = (u_int8_t)data; 839 xa->fis->lba_low = (u_int8_t)(data >> 8); 840 xa->fis->lba_mid = (u_int8_t)(data >> 16); 841 xa->fis->lba_high = (u_int8_t)(data >> 24); 842 xa->fis->control = ATA_FIS_CONTROL_4BIT; 843 844 xa->complete = ahci_pm_dummy_done; 845 xa->datalen = 0; 846 xa->flags = ATA_F_POLL; 847 xa->timeout = 1000; 848 849 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) 850 error = 0; 851 else 852 error = EIO; 853 ahci_ata_put_xfer(xa); 854 return(error); 855 } 856 857 /* 858 * Dummy done callback for xa. 859 */ 860 static void 861 ahci_pm_dummy_done(struct ata_xfer *xa) 862 { 863 } 864 865