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 /* 145 * The only way one can determine if a port multiplier is on the 146 * port is to probe target 15, and of course this will fail if 147 * there is no port multiplier. 148 * 149 * The probing has to be done whether or not a device is probed on 150 * target 0, because when a PM is attached target 0 represents 151 * slot #0 behind the PM. 152 */ 153 if (ahci_poll(ccb, 1000, ahci_quick_timeout) != ATA_S_COMPLETE) { 154 kprintf("%s: PMPROBE First FIS failed,\n", 155 PORTNAME(ap)); 156 kprintf("%s: PMPROBE No Port Multiplier was found.\n", 157 PORTNAME(ap)); 158 if (--count) { 159 ahci_put_err_ccb(ccb); 160 goto retry; 161 } 162 error = EBUSY; 163 goto err; 164 } 165 if (ahci_pwait_clr(ap, AHCI_PREG_TFD, 166 AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { 167 kprintf("%s: PMPROBE Busy after first FIS\n", PORTNAME(ap)); 168 } 169 170 /* 171 * The device may have muffed up the PHY when it reset. 172 */ 173 ahci_os_sleep(100); 174 ahci_flush_tfd(ap); 175 ahci_pwrite(ap, AHCI_PREG_SERR, -1); 176 /* ahci_pm_phy_status(ap, 15, &cmd); */ 177 178 /* 179 * Prep second D2H command to read status and complete reset sequence 180 * AHCI 10.4.1 and "Serial ATA Revision 2.6". I can't find the ATA 181 * Rev 2.6 and it is unclear how the second FIS should be set up 182 * from the AHCI document. 183 * 184 * Give the device 3ms before sending the second FIS. 185 * 186 * It is unclear which other fields in the FIS are used. Just zero 187 * everything. 188 */ 189 ccb->ccb_xa.flags = ATA_F_POLL; 190 191 bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); 192 fis[0] = ATA_FIS_TYPE_H2D; 193 fis[1] = 0x0F; 194 fis[15] = ATA_FIS_CONTROL_4BIT; 195 196 cmd_slot->prdtl = 0; 197 cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ 198 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_PMP); /* port 0xF */ 199 200 ccb->ccb_xa.state = ATA_S_PENDING; 201 202 /* 203 * The only way one can determine if a port multiplier is on the 204 * port is to probe target 15, and of course this will fail if 205 * there is no port multiplier. 206 * 207 * The probing has to be done whether or not a device is probed on 208 * target 0, because when a PM is attached target 0 represents 209 * slot #0 behind the PM. 210 */ 211 if (ahci_poll(ccb, 5000, ahci_quick_timeout) != ATA_S_COMPLETE) { 212 kprintf("%s: PMPROBE Second FIS failed,\n", 213 PORTNAME(ap)); 214 kprintf("%s: PMPROBE No Port Multiplier was found.\n", 215 PORTNAME(ap)); 216 if (--count) { 217 ahci_put_err_ccb(ccb); 218 goto retry; 219 } 220 error = EBUSY; 221 goto err; 222 } 223 224 /* 225 * What? We succeeded? Yup, but for some reason the signature 226 * is still latched from the original detect (that saw target 0 227 * behind the PM), and I don't know how to clear the condition 228 * other then by retrying the whole reset sequence. 229 */ 230 if (--count) { 231 fis[15] = 0; 232 ahci_put_err_ccb(ccb); 233 goto retry; 234 } 235 236 /* 237 * Get the signature. The caller sets the ap fields. 238 */ 239 if (ahci_port_signature_detect(ap, NULL) == ATA_PORT_T_PM) { 240 ap->ap_ata[15]->at_probe = ATA_PROBE_GOOD; 241 error = 0; 242 } else { 243 error = EBUSY; 244 } 245 246 /* 247 * Fall through / clean up the CCB and perform error processing. 248 */ 249 err: 250 if (ccb != NULL) 251 ahci_put_err_ccb(ccb); 252 253 if (error == 0 && ahci_pm_identify(ap)) { 254 kprintf("%s: PM - cannot identify port multiplier\n", 255 PORTNAME(ap)); 256 error = EBUSY; 257 } 258 259 /* 260 * If we probed the PM reset the state for the targets behind 261 * it so they get probed by the state machine. 262 */ 263 if (error == 0) { 264 for (i = 0; i < AHCI_MAX_PMPORTS; ++i) { 265 at = ap->ap_ata[i]; 266 at->at_probe = ATA_PROBE_NEED_INIT; 267 at->at_features |= ATA_PORT_F_RESCAN; 268 } 269 ap->ap_type = ATA_PORT_T_PM; 270 return (0); 271 } 272 273 /* 274 * If we failed turn off PMA, otherwise identify the port multiplier. 275 * CAM will iterate the devices. 276 */ 277 ahci_port_stop(ap, 0); 278 ahci_port_clo(ap); 279 cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; 280 cmd &= ~AHCI_PREG_CMD_PMA; 281 ahci_pwrite(ap, AHCI_PREG_CMD, cmd); 282 ahci_port_init(ap); 283 if (orig_error == 0) { 284 if (ahci_pwait_clr(ap, AHCI_PREG_TFD, 285 AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { 286 kprintf("%s: PM probe: port will not come ready\n", 287 PORTNAME(ap)); 288 orig_error = EBUSY; 289 } 290 } 291 return(orig_error); 292 } 293 294 /* 295 * Identify the port multiplier 296 */ 297 int 298 ahci_pm_identify(struct ahci_port *ap) 299 { 300 u_int32_t chipid; 301 u_int32_t rev; 302 u_int32_t nports; 303 u_int32_t data1; 304 u_int32_t data2; 305 int has_dummy_port; 306 307 ap->ap_probe = ATA_PROBE_FAILED; 308 if (ahci_pm_read(ap, 15, 0, &chipid)) 309 goto err; 310 if (ahci_pm_read(ap, 15, 1, &rev)) 311 goto err; 312 if (ahci_pm_read(ap, 15, 2, &nports)) 313 goto err; 314 nports &= 0x0000000F; /* only the low 4 bits */ 315 ap->ap_probe = ATA_PROBE_GOOD; 316 317 /* 318 * Ignore fake port on PMs which have it. We can probe it but the 319 * softreset will probably fail. 320 */ 321 switch(chipid) { 322 case 0x37261095: 323 has_dummy_port = 1; 324 break; 325 default: 326 has_dummy_port = 0; 327 break; 328 } 329 if (has_dummy_port) { 330 if (nports > 1) 331 --nports; 332 } 333 334 kprintf("%s: Port multiplier: chip=%08x rev=0x%b nports=%d\n", 335 PORTNAME(ap), 336 chipid, 337 rev, SATA_PFMT_PM_REV, 338 nports); 339 if (has_dummy_port) { 340 kprintf("%s: Port multiplier: Ignoring dummy port #%d\n", 341 PORTNAME(ap), nports); 342 } 343 ap->ap_pmcount = nports; 344 345 if (ahci_pm_read(ap, 15, SATA_PMREG_FEA, &data1)) { 346 kprintf("%s: Port multiplier: Warning, " 347 "cannot read feature register\n", PORTNAME(ap)); 348 } else { 349 kprintf("%s: Port multiplier features: 0x%b\n", 350 PORTNAME(ap), 351 data1, 352 SATA_PFMT_PM_FEA); 353 } 354 if (ahci_pm_read(ap, 15, SATA_PMREG_FEAEN, &data2) == 0) { 355 kprintf("%s: Port multiplier defaults: 0x%b\n", 356 PORTNAME(ap), 357 data2, 358 SATA_PFMT_PM_FEA); 359 } 360 361 /* 362 * Turn on async notification if we support and the PM supports it. 363 * This allows the PM to forward async notification events to us and 364 * it will also generate an event for target 15 for hot-plug events 365 * (or is supposed to anyway). 366 */ 367 if ((ap->ap_sc->sc_cap & AHCI_REG_CAP_SSNTF) && 368 (data1 & SATA_PMFEA_ASYNCNOTIFY)) { 369 u_int32_t serr_bits = AHCI_PREG_SERR_DIAG_N | 370 AHCI_PREG_SERR_DIAG_X; 371 data2 |= SATA_PMFEA_ASYNCNOTIFY; 372 if (ahci_pm_write(ap, 15, SATA_PMREG_FEAEN, data2)) { 373 kprintf("%s: Port multiplier: AsyncNotify cannot be " 374 "enabled\n", PORTNAME(ap)); 375 } else if (ahci_pm_write(ap, 15, SATA_PMREG_EEENA, serr_bits)) { 376 kprintf("%s: Port mulltiplier: AsyncNotify unable " 377 "to enable error info bits\n", PORTNAME(ap)); 378 } else { 379 kprintf("%s: Port multiplier: AsyncNotify enabled\n", 380 PORTNAME(ap)); 381 } 382 } 383 384 return (0); 385 err: 386 kprintf("%s: Port multiplier cannot be identified\n", PORTNAME(ap)); 387 return (EIO); 388 } 389 390 /* 391 * Do a COMRESET sequence on the target behind a port multiplier. 392 * 393 * If hard is 2 we also cycle the phy on the target. 394 * 395 * This must be done prior to any softreset or probe attempts on 396 * targets behind the port multiplier. 397 * 398 * Returns 0 on success or an error. 399 */ 400 int 401 ahci_pm_hardreset(struct ahci_port *ap, int target, int hard) 402 { 403 struct ata_port *at; 404 u_int32_t data; 405 int loop; 406 int error = EIO; 407 408 at = ap->ap_ata[target]; 409 410 /* 411 * Turn off power management and kill the phy on the target 412 * if requested. Hold state for 10ms. 413 */ 414 data = AHCI_PREG_SCTL_IPM_DISABLED; 415 if (hard == 2) 416 data |= AHCI_PREG_SCTL_DET_DISABLE; 417 if (ahci_pm_write(ap, target, SATA_PMREG_SERR, -1)) 418 goto err; 419 if (ahci_pm_write(ap, target, SATA_PMREG_SCTL, data)) 420 goto err; 421 ahci_os_sleep(10); 422 423 /* 424 * Start transmitting COMRESET. COMRESET must be sent for at 425 * least 1ms. 426 */ 427 at->at_probe = ATA_PROBE_FAILED; 428 at->at_type = ATA_PORT_T_NONE; 429 data = AHCI_PREG_SCTL_IPM_DISABLED | AHCI_PREG_SCTL_DET_INIT; 430 if (AhciForceGen1 & (1 << ap->ap_num)) { 431 kprintf("%s.%d: Force 1.5GBits\n", PORTNAME(ap), target); 432 data |= AHCI_PREG_SCTL_SPD_GEN1; 433 } else { 434 data |= AHCI_PREG_SCTL_SPD_ANY; 435 } 436 if (ahci_pm_write(ap, target, SATA_PMREG_SCTL, data)) 437 goto err; 438 439 /* 440 * It takes about 100ms for the DET logic to settle down, 441 * from trial and error testing. If this is too short 442 * the softreset code will fail. 443 */ 444 ahci_os_sleep(100); 445 446 if (ahci_pm_phy_status(ap, target, &data)) { 447 kprintf("%s: (A)Cannot clear phy status\n", 448 ATANAME(ap ,at)); 449 } 450 451 /* 452 * Flush any status, then clear DET to initiate negotiation. 453 */ 454 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 455 data = AHCI_PREG_SCTL_IPM_DISABLED | AHCI_PREG_SCTL_DET_NONE; 456 if (ahci_pm_write(ap, target, SATA_PMREG_SCTL, data)) 457 goto err; 458 459 /* 460 * Try to determine if there is a device on the port. 461 * 462 * Give the device 3/10 second to at least be detected. 463 * If we fail clear any pending status since we may have 464 * cycled the phy and probably caused another PRCS interrupt. 465 */ 466 for (loop = 3; loop; --loop) { 467 if (ahci_pm_read(ap, target, SATA_PMREG_SSTS, &data)) 468 goto err; 469 if (data & AHCI_PREG_SSTS_DET) 470 break; 471 ahci_os_sleep(100); 472 } 473 if (loop == 0) { 474 kprintf("%s.%d: Port appears to be unplugged\n", 475 PORTNAME(ap), target); 476 error = ENODEV; 477 goto err; 478 } 479 480 /* 481 * There is something on the port. Give the device 3 seconds 482 * to fully negotiate. 483 */ 484 for (loop = 30; loop; --loop) { 485 if (ahci_pm_read(ap, target, SATA_PMREG_SSTS, &data)) 486 goto err; 487 if ((data & AHCI_PREG_SSTS_DET) == AHCI_PREG_SSTS_DET_DEV) 488 break; 489 ahci_os_sleep(100); 490 } 491 492 /* 493 * Device not detected 494 */ 495 if (loop == 0) { 496 kprintf("%s: Device may be powered down\n", 497 PORTNAME(ap)); 498 error = ENODEV; 499 goto err; 500 } 501 502 /* 503 * Device detected 504 */ 505 kprintf("%s.%d: Device detected data=%08x\n", 506 PORTNAME(ap), target, data); 507 /* 508 * Clear SERR on the target so we get a new NOTIFY event if a hot-plug 509 * or hot-unplug occurs. 510 */ 511 ahci_os_sleep(100); 512 513 error = 0; 514 err: 515 at->at_probe = error ? ATA_PROBE_FAILED : ATA_PROBE_NEED_SOFT_RESET; 516 return (error); 517 } 518 519 /* 520 * AHCI soft reset through port multiplier. 521 * 522 * This function keeps port communications intact and attempts to generate 523 * a reset to the connected device using device commands. Unlike 524 * hard-port operations we can't do fancy stop/starts or stuff like 525 * that without messing up other commands that might be running or 526 * queued. 527 */ 528 int 529 ahci_pm_softreset(struct ahci_port *ap, int target) 530 { 531 struct ata_port *at; 532 struct ahci_ccb *ccb; 533 struct ahci_cmd_hdr *cmd_slot; 534 u_int8_t *fis; 535 int count; 536 int error; 537 u_int32_t data; 538 int tried_longer; 539 540 error = EIO; 541 at = ap->ap_ata[target]; 542 543 DPRINTF(AHCI_D_VERBOSE, "%s: soft reset\n", PORTNAME(ap)); 544 545 count = 2; 546 tried_longer = 0; 547 retry: 548 /* 549 * Try to clear the phy so we get a good signature, otherwise 550 * the PM may not latch a new signature. 551 * 552 * NOTE: This cannot be safely done between the first and second 553 * softreset FISs. It's now or never. 554 */ 555 #if 1 556 if (ahci_pm_phy_status(ap, target, &data)) { 557 kprintf("%s: (B)Cannot clear phy status\n", 558 ATANAME(ap ,at)); 559 } 560 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 561 #endif 562 563 /* 564 * Prep first D2H command with SRST feature & clear busy/reset flags 565 * 566 * It is unclear which other fields in the FIS are used. Just zero 567 * everything. 568 * 569 * When soft-resetting a port behind a multiplier at will be 570 * non-NULL, assigning it to the ccb prevents the port interrupt 571 * from hard-resetting the port if a problem crops up. 572 */ 573 ccb = ahci_get_err_ccb(ap); 574 ccb->ccb_xa.flags = ATA_F_POLL | ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE; 575 ccb->ccb_xa.complete = ahci_pm_dummy_done; 576 ccb->ccb_xa.at = at; 577 578 fis = ccb->ccb_cmd_table->cfis; 579 bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); 580 fis[0] = ATA_FIS_TYPE_H2D; 581 fis[1] = at->at_target; 582 fis[15] = ATA_FIS_CONTROL_SRST|ATA_FIS_CONTROL_4BIT; 583 584 cmd_slot = ccb->ccb_cmd_hdr; 585 cmd_slot->prdtl = 0; 586 cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ 587 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_C); /* Clear busy on OK */ 588 cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_R); /* Reset */ 589 cmd_slot->flags |= htole16(at->at_target << 590 AHCI_CMD_LIST_FLAG_PMP_SHIFT); 591 592 ccb->ccb_xa.state = ATA_S_PENDING; 593 594 /* 595 * XXX hack to ignore IFS errors which can occur during the target 596 * device's reset. 597 * 598 * If an IFS error occurs the target is probably powering up, 599 * so we try for a longer period of time. 600 */ 601 ap->ap_flags |= AP_F_IGNORE_IFS; 602 ap->ap_flags &= ~(AP_F_IFS_IGNORED | AP_F_IFS_OCCURED); 603 604 if (ahci_poll(ccb, 1000, ahci_ata_cmd_timeout) != ATA_S_COMPLETE) { 605 kprintf("%s: (PM) First FIS failed\n", ATANAME(ap, at)); 606 if (ap->ap_flags & AP_F_IFS_OCCURED) { 607 if (tried_longer == 0) 608 count += 4; 609 ++tried_longer; 610 } 611 ahci_put_err_ccb(ccb); 612 if (--count) 613 goto retry; 614 goto err; 615 } 616 617 /* 618 * WARNING! SENSITIVE TIME PERIOD! WARNING! 619 * 620 * The first and second FISes are supposed to be back-to-back, 621 * I think the idea is to get the second sent and then after 622 * the device resets it will send a signature. Do not delay 623 * here and most definitely do not issue any commands to other 624 * targets! 625 */ 626 627 /* 628 * Prep second D2H command to read status and complete reset sequence 629 * AHCI 10.4.1 and "Serial ATA Revision 2.6". I can't find the ATA 630 * Rev 2.6 and it is unclear how the second FIS should be set up 631 * from the AHCI document. 632 * 633 * Give the device 3ms before sending the second FIS. 634 * 635 * It is unclear which other fields in the FIS are used. Just zero 636 * everything. 637 */ 638 bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); 639 fis[0] = ATA_FIS_TYPE_H2D; 640 fis[1] = at->at_target; 641 fis[15] = ATA_FIS_CONTROL_4BIT; 642 643 cmd_slot->prdtl = 0; 644 cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ 645 cmd_slot->flags |= htole16(at->at_target << 646 AHCI_CMD_LIST_FLAG_PMP_SHIFT); 647 648 ccb->ccb_xa.state = ATA_S_PENDING; 649 ccb->ccb_xa.flags = ATA_F_POLL | ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE; 650 651 if (ahci_poll(ccb, 1000, ahci_ata_cmd_timeout) != ATA_S_COMPLETE) { 652 kprintf("%s: (PM) Second FIS failed\n", ATANAME(ap, at)); 653 ahci_put_err_ccb(ccb); 654 #if 1 655 if (--count) 656 goto retry; 657 #endif 658 goto err; 659 } 660 661 ahci_put_err_ccb(ccb); 662 ahci_os_sleep(100); 663 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 664 if (ahci_pm_phy_status(ap, target, &data)) { 665 kprintf("%s: (C)Cannot clear phy status\n", 666 ATANAME(ap ,at)); 667 } 668 ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 669 670 /* 671 * Do it again, even if we think we got a good result 672 */ 673 if (--count) { 674 fis[15] = 0; 675 goto retry; 676 } 677 678 /* 679 * If the softreset is trying to clear a BSY condition after a 680 * normal portreset we assign the port type. 681 * 682 * If the softreset is being run first as part of the ccb error 683 * processing code then report if the device signature changed 684 * unexpectedly. 685 */ 686 if (at->at_type == ATA_PORT_T_NONE) { 687 at->at_type = ahci_port_signature_detect(ap, at); 688 } else { 689 if (ahci_port_signature_detect(ap, at) != at->at_type) { 690 kprintf("%s: device signature unexpectedly " 691 "changed\n", ATANAME(ap, at)); 692 error = EBUSY; /* XXX */ 693 } 694 } 695 error = 0; 696 697 /* 698 * Who knows what kind of mess occured. We have exclusive access 699 * to the port so try to clean up potential problems. 700 */ 701 ahci_os_sleep(100); 702 err: 703 /* 704 * Clear error status so we can detect removal. 705 */ 706 if (ahci_pm_write(ap, target, SATA_PMREG_SERR, -1)) { 707 kprintf("%s: ahci_pm_softreset unable to clear SERR\n", 708 ATANAME(ap, at)); 709 ap->ap_flags &= ~AP_F_IGNORE_IFS; 710 } 711 /* ahci_pwrite(ap, AHCI_PREG_SERR, -1);*/ 712 713 at->at_probe = error ? ATA_PROBE_FAILED : ATA_PROBE_NEED_IDENT; 714 return (error); 715 } 716 717 718 /* 719 * Return the phy status for a target behind a port multiplier and 720 * reset SATA_PMREG_SERR. 721 * 722 * Returned bits follow AHCI_PREG_SSTS bits. The AHCI_PREG_SSTS_SPD 723 * bits can be used to determine the link speed and will be 0 if there 724 * is no link. 725 * 726 * 0 is returned if any communications error occurs. 727 */ 728 int 729 ahci_pm_phy_status(struct ahci_port *ap, int target, u_int32_t *datap) 730 { 731 int error; 732 733 error = ahci_pm_read(ap, target, SATA_PMREG_SSTS, datap); 734 if (error == 0) 735 error = ahci_pm_write(ap, target, SATA_PMREG_SERR, -1); 736 if (error) 737 *datap = 0; 738 return(error); 739 } 740 741 /* 742 * Check that a target is still good. 743 */ 744 void 745 ahci_pm_check_good(struct ahci_port *ap, int target) 746 { 747 struct ata_port *at; 748 u_int32_t data; 749 750 /* 751 * It looks like we might have to read the EINFO register 752 * to allow the PM to generate a new event. 753 */ 754 if (ahci_pm_read(ap, 15, SATA_PMREG_EINFO, &data)) { 755 kprintf("%s: Port multiplier EINFO could not be read\n", 756 PORTNAME(ap)); 757 } 758 759 if (ahci_pm_write(ap, target, SATA_PMREG_SERR, -1)) { 760 kprintf("%s: Port multiplier: SERR could not be cleared\n", 761 PORTNAME(ap)); 762 } 763 764 if (target == CAM_TARGET_WILDCARD || target >= ap->ap_pmcount) 765 return; 766 at = ap->ap_ata[target]; 767 768 /* 769 * If the device needs an init or hard reset also make sure the 770 * PHY is turned on. 771 */ 772 if (at->at_probe <= ATA_PROBE_NEED_HARD_RESET) { 773 /*kprintf("%s DOHARD\n", ATANAME(ap, at));*/ 774 ahci_pm_hardreset(ap, target, 1); 775 } 776 777 /* 778 * Read the detect status 779 */ 780 if (ahci_pm_read(ap, target, SATA_PMREG_SSTS, &data)) { 781 kprintf("%s: Unable to access PM SSTS register target %d\n", 782 PORTNAME(ap), target); 783 return; 784 } 785 if ((data & AHCI_PREG_SSTS_DET) != AHCI_PREG_SSTS_DET_DEV) { 786 /*kprintf("%s: DETECT %08x\n", ATANAME(ap, at), data);*/ 787 if (at->at_probe != ATA_PROBE_FAILED) { 788 at->at_probe = ATA_PROBE_FAILED; 789 at->at_type = ATA_PORT_T_NONE; 790 at->at_features |= ATA_PORT_F_RESCAN; 791 kprintf("%s: HOTPLUG (PM) - Device removed\n", 792 ATANAME(ap, at)); 793 } 794 } else { 795 if (at->at_probe == ATA_PROBE_FAILED) { 796 at->at_probe = ATA_PROBE_NEED_HARD_RESET; 797 at->at_features |= ATA_PORT_F_RESCAN; 798 kprintf("%s: HOTPLUG (PM) - Device inserted\n", 799 ATANAME(ap, at)); 800 } 801 } 802 } 803 804 /* 805 * Read a PM register 806 */ 807 int 808 ahci_pm_read(struct ahci_port *ap, int target, int which, u_int32_t *datap) 809 { 810 struct ata_xfer *xa; 811 int error; 812 813 xa = ahci_ata_get_xfer(ap, ap->ap_ata[15]); 814 815 xa->fis->type = ATA_FIS_TYPE_H2D; 816 xa->fis->flags = ATA_H2D_FLAGS_CMD | 15; 817 xa->fis->command = ATA_C_READ_PM; 818 xa->fis->features = which; 819 xa->fis->device = target | ATA_H2D_DEVICE_LBA; 820 xa->fis->control = ATA_FIS_CONTROL_4BIT; 821 822 xa->complete = ahci_pm_dummy_done; 823 xa->datalen = 0; 824 xa->flags = ATA_F_POLL | ATA_F_AUTOSENSE; 825 xa->timeout = 1000; 826 827 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) { 828 *datap = xa->rfis.sector_count | (xa->rfis.lba_low << 8) | 829 (xa->rfis.lba_mid << 16) | (xa->rfis.lba_high << 24); 830 error = 0; 831 } else { 832 kprintf("%s.%d pm_read SCA[%d] failed\n", 833 PORTNAME(ap), target, which); 834 *datap = 0; 835 error = EIO; 836 } 837 ahci_ata_put_xfer(xa); 838 return (error); 839 } 840 841 /* 842 * Write a PM register 843 */ 844 int 845 ahci_pm_write(struct ahci_port *ap, int target, int which, u_int32_t data) 846 { 847 struct ata_xfer *xa; 848 int error; 849 850 xa = ahci_ata_get_xfer(ap, ap->ap_ata[15]); 851 852 xa->fis->type = ATA_FIS_TYPE_H2D; 853 xa->fis->flags = ATA_H2D_FLAGS_CMD | 15; 854 xa->fis->command = ATA_C_WRITE_PM; 855 xa->fis->features = which; 856 xa->fis->device = target | ATA_H2D_DEVICE_LBA; 857 xa->fis->sector_count = (u_int8_t)data; 858 xa->fis->lba_low = (u_int8_t)(data >> 8); 859 xa->fis->lba_mid = (u_int8_t)(data >> 16); 860 xa->fis->lba_high = (u_int8_t)(data >> 24); 861 xa->fis->control = ATA_FIS_CONTROL_4BIT; 862 863 xa->complete = ahci_pm_dummy_done; 864 xa->datalen = 0; 865 xa->flags = ATA_F_POLL; 866 xa->timeout = 1000; 867 868 if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) 869 error = 0; 870 else 871 error = EIO; 872 ahci_ata_put_xfer(xa); 873 return(error); 874 } 875 876 /* 877 * Dummy done callback for xa. 878 */ 879 static void 880 ahci_pm_dummy_done(struct ata_xfer *xa) 881 { 882 } 883 884