| 1 | /* |
| 2 | * (MPSAFE) |
| 3 | * |
| 4 | * Copyright (c) 2006 David Gwynne <dlg@openbsd.org> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | * |
| 18 | * |
| 19 | * Copyright (c) 2009 The DragonFly Project. All rights reserved. |
| 20 | * |
| 21 | * This code is derived from software contributed to The DragonFly Project |
| 22 | * by Matthew Dillon <dillon@backplane.com> |
| 23 | * |
| 24 | * Redistribution and use in source and binary forms, with or without |
| 25 | * modification, are permitted provided that the following conditions |
| 26 | * are met: |
| 27 | * |
| 28 | * 1. Redistributions of source code must retain the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer. |
| 30 | * 2. Redistributions in binary form must reproduce the above copyright |
| 31 | * notice, this list of conditions and the following disclaimer in |
| 32 | * the documentation and/or other materials provided with the |
| 33 | * distribution. |
| 34 | * 3. Neither the name of The DragonFly Project nor the names of its |
| 35 | * contributors may be used to endorse or promote products derived |
| 36 | * from this software without specific, prior written permission. |
| 37 | * |
| 38 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 39 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 40 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 41 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 42 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 43 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 44 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 46 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 47 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 48 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 49 | * SUCH DAMAGE. |
| 50 | * |
| 51 | * $OpenBSD: ahci.c,v 1.147 2009/02/16 21:19:07 miod Exp $ |
| 52 | */ |
| 53 | |
| 54 | #include "ahci.h" |
| 55 | |
| 56 | void ahci_port_interrupt_enable(struct ahci_port *ap); |
| 57 | |
| 58 | int ahci_load_prdt(struct ahci_ccb *); |
| 59 | void ahci_unload_prdt(struct ahci_ccb *); |
| 60 | static void ahci_load_prdt_callback(void *info, bus_dma_segment_t *segs, |
| 61 | int nsegs, int error); |
| 62 | void ahci_start(struct ahci_ccb *); |
| 63 | int ahci_port_softreset(struct ahci_port *ap); |
| 64 | int ahci_port_hardreset(struct ahci_port *ap, int hard); |
| 65 | void ahci_port_hardstop(struct ahci_port *ap); |
| 66 | |
| 67 | static void ahci_ata_cmd_timeout_unserialized(void *); |
| 68 | void ahci_check_active_timeouts(struct ahci_port *ap); |
| 69 | |
| 70 | void ahci_beg_exclusive_access(struct ahci_port *ap, struct ata_port *at); |
| 71 | void ahci_end_exclusive_access(struct ahci_port *ap, struct ata_port *at); |
| 72 | void ahci_issue_pending_commands(struct ahci_port *ap, struct ahci_ccb *ccb); |
| 73 | void ahci_issue_saved_commands(struct ahci_port *ap, u_int32_t mask); |
| 74 | |
| 75 | int ahci_port_read_ncq_error(struct ahci_port *, int); |
| 76 | |
| 77 | struct ahci_dmamem *ahci_dmamem_alloc(struct ahci_softc *, bus_dma_tag_t tag); |
| 78 | void ahci_dmamem_free(struct ahci_softc *, struct ahci_dmamem *); |
| 79 | static void ahci_dmamem_saveseg(void *info, bus_dma_segment_t *segs, int nsegs, int error); |
| 80 | |
| 81 | static void ahci_dummy_done(struct ata_xfer *xa); |
| 82 | static void ahci_empty_done(struct ahci_ccb *ccb); |
| 83 | static void ahci_ata_cmd_done(struct ahci_ccb *ccb); |
| 84 | static u_int32_t ahci_pactive(struct ahci_port *ap); |
| 85 | |
| 86 | /* |
| 87 | * Initialize the global AHCI hardware. This code does not set up any of |
| 88 | * its ports. |
| 89 | */ |
| 90 | int |
| 91 | ahci_init(struct ahci_softc *sc) |
| 92 | { |
| 93 | u_int32_t cap, pi, pleft; |
| 94 | int i; |
| 95 | struct ahci_port *ap; |
| 96 | |
| 97 | DPRINTF(AHCI_D_VERBOSE, " GHC 0x%b", |
| 98 | ahci_read(sc, AHCI_REG_GHC), AHCI_FMT_GHC); |
| 99 | |
| 100 | /* |
| 101 | * save BIOS initialised parameters, enable staggered spin up |
| 102 | */ |
| 103 | cap = ahci_read(sc, AHCI_REG_CAP); |
| 104 | cap &= AHCI_REG_CAP_SMPS; |
| 105 | cap |= AHCI_REG_CAP_SSS; |
| 106 | pi = ahci_read(sc, AHCI_REG_PI); |
| 107 | |
| 108 | /* |
| 109 | * Unconditionally reset the controller, do not conditionalize on |
| 110 | * trying to figure it if it was previously active or not. |
| 111 | * |
| 112 | * NOTE: On AE before HR. The AHCI-1.1 spec has a note in section |
| 113 | * 5.2.2.1 regarding this. HR should be set to 1 only after |
| 114 | * AE is set to 1. The reset sequence will clear HR when |
| 115 | * it completes, and will also clear AE if SAM is 0. AE must |
| 116 | * then be set again. When SAM is 1 the AE bit typically reads |
| 117 | * as 1 (and is read-only). |
| 118 | * |
| 119 | * NOTE: Avoid PCI[e] transaction burst by issuing dummy reads, |
| 120 | * otherwise the writes will only be separated by a few |
| 121 | * nanoseconds. |
| 122 | * |
| 123 | * NOTE BRICKS (1) |
| 124 | * |
| 125 | * If you have a port multiplier and it does not have a device |
| 126 | * in target 0, and it probes normally, but a later operation |
| 127 | * mis-probes a target behind that PM, it is possible for the |
| 128 | * port to brick such that only (a) a power cycle of the host |
| 129 | * or (b) placing a device in target 0 will fix the problem. |
| 130 | * Power cycling the PM has no effect (it works fine on another |
| 131 | * host port). This issue is unrelated to CLO. |
| 132 | */ |
| 133 | /* |
| 134 | * Wait for any prior reset sequence to complete |
| 135 | */ |
| 136 | if (ahci_wait_ne(sc, AHCI_REG_GHC, |
| 137 | AHCI_REG_GHC_HR, AHCI_REG_GHC_HR) != 0) { |
| 138 | device_printf(sc->sc_dev, "Controller is stuck in reset\n"); |
| 139 | return (1); |
| 140 | } |
| 141 | ahci_write(sc, AHCI_REG_GHC, AHCI_REG_GHC_AE); |
| 142 | ahci_os_sleep(500); |
| 143 | ahci_read(sc, AHCI_REG_GHC); /* flush */ |
| 144 | ahci_write(sc, AHCI_REG_GHC, AHCI_REG_GHC_AE | AHCI_REG_GHC_HR); |
| 145 | ahci_os_sleep(500); |
| 146 | ahci_read(sc, AHCI_REG_GHC); /* flush */ |
| 147 | if (ahci_wait_ne(sc, AHCI_REG_GHC, |
| 148 | AHCI_REG_GHC_HR, AHCI_REG_GHC_HR) != 0) { |
| 149 | device_printf(sc->sc_dev, "unable to reset controller\n"); |
| 150 | return (1); |
| 151 | } |
| 152 | if (ahci_read(sc, AHCI_REG_GHC) & AHCI_REG_GHC_AE) { |
| 153 | device_printf(sc->sc_dev, "AE did not auto-clear!\n"); |
| 154 | ahci_write(sc, AHCI_REG_GHC, 0); |
| 155 | ahci_os_sleep(500); |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * Enable ahci (global interrupts disabled) |
| 160 | * |
| 161 | * Restore saved parameters. Avoid pci transaction burst write |
| 162 | * by issuing dummy reads. |
| 163 | */ |
| 164 | ahci_os_sleep(500); |
| 165 | ahci_write(sc, AHCI_REG_GHC, AHCI_REG_GHC_AE); |
| 166 | ahci_os_sleep(500); |
| 167 | |
| 168 | ahci_read(sc, AHCI_REG_GHC); /* flush */ |
| 169 | ahci_write(sc, AHCI_REG_CAP, cap); |
| 170 | ahci_write(sc, AHCI_REG_PI, pi); |
| 171 | ahci_read(sc, AHCI_REG_GHC); /* flush */ |
| 172 | |
| 173 | /* |
| 174 | * Intel hocus pocus in case the BIOS has not set the chip up |
| 175 | * properly for AHCI operation. |
| 176 | */ |
| 177 | if (pci_get_vendor(sc->sc_dev) == PCI_VENDOR_INTEL) { |
| 178 | if ((pci_read_config(sc->sc_dev, 0x92, 2) & 0x0F) != 0x0F) |
| 179 | device_printf(sc->sc_dev, "Intel hocus pocus\n"); |
| 180 | pci_write_config(sc->sc_dev, 0x92, |
| 181 | pci_read_config(sc->sc_dev, 0x92, 2) | 0x0F, 2); |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * This is a hack that currently does not appear to have |
| 186 | * a significant effect, but I noticed the port registers |
| 187 | * do not appear to be completely cleared after the host |
| 188 | * controller is reset. |
| 189 | * |
| 190 | * Use a temporary ap structure so we can call ahci_pwrite(). |
| 191 | * |
| 192 | * We must be sure to stop the port |
| 193 | */ |
| 194 | ap = kmalloc(sizeof(*ap), M_DEVBUF, M_WAITOK | M_ZERO); |
| 195 | ap->ap_sc = sc; |
| 196 | pleft = pi; |
| 197 | for (i = 0; i < AHCI_MAX_PORTS; ++i) { |
| 198 | if (pleft == 0) |
| 199 | break; |
| 200 | if ((pi & (1 << i)) == 0) |
| 201 | continue; |
| 202 | if (bus_space_subregion(sc->sc_iot, sc->sc_ioh, |
| 203 | AHCI_PORT_REGION(i), AHCI_PORT_SIZE, &ap->ap_ioh) != 0) { |
| 204 | device_printf(sc->sc_dev, "can't map port\n"); |
| 205 | return (1); |
| 206 | } |
| 207 | /* |
| 208 | * NOTE! Setting AHCI_PREG_SCTL_DET_DISABLE on AHCI1.0 or |
| 209 | * AHCI1.1 can brick the chipset. Not only brick it, |
| 210 | * but also crash the PC. The bit seems unreliable |
| 211 | * on AHCI1.2 as well. |
| 212 | */ |
| 213 | ahci_port_stop(ap, 1); |
| 214 | ahci_pwrite(ap, AHCI_PREG_SCTL, AHCI_PREG_SCTL_IPM_DISABLED); |
| 215 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 216 | ahci_pwrite(ap, AHCI_PREG_IE, 0); |
| 217 | ahci_write(ap->ap_sc, AHCI_REG_IS, 1 << i); |
| 218 | ahci_pwrite(ap, AHCI_PREG_CMD, 0); |
| 219 | ahci_pwrite(ap, AHCI_PREG_IS, -1); |
| 220 | sc->sc_portmask |= (1 << i); |
| 221 | pleft &= ~(1 << i); |
| 222 | } |
| 223 | sc->sc_numports = i; |
| 224 | kfree(ap, M_DEVBUF); |
| 225 | |
| 226 | return (0); |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * Allocate and initialize an AHCI port. |
| 231 | */ |
| 232 | int |
| 233 | ahci_port_alloc(struct ahci_softc *sc, u_int port) |
| 234 | { |
| 235 | struct ahci_port *ap; |
| 236 | struct ata_port *at; |
| 237 | struct ahci_ccb *ccb; |
| 238 | u_int64_t dva; |
| 239 | u_int32_t cmd; |
| 240 | u_int32_t data; |
| 241 | struct ahci_cmd_hdr *hdr; |
| 242 | struct ahci_cmd_table *table; |
| 243 | int rc = ENOMEM; |
| 244 | int error; |
| 245 | int i; |
| 246 | |
| 247 | ap = kmalloc(sizeof(*ap), M_DEVBUF, M_WAITOK | M_ZERO); |
| 248 | ap->ap_err_scratch = kmalloc(512, M_DEVBUF, M_WAITOK | M_ZERO); |
| 249 | |
| 250 | ksnprintf(ap->ap_name, sizeof(ap->ap_name), "%s%d.%d", |
| 251 | device_get_name(sc->sc_dev), |
| 252 | device_get_unit(sc->sc_dev), |
| 253 | port); |
| 254 | sc->sc_ports[port] = ap; |
| 255 | |
| 256 | /* |
| 257 | * Allocate enough so we never have to reallocate, it makes |
| 258 | * it easier. |
| 259 | * |
| 260 | * ap_pmcount will be reduced by the scan if we encounter the |
| 261 | * port multiplier port prior to target 15. |
| 262 | * |
| 263 | * kmalloc power-of-2 allocations are guaranteed not to cross |
| 264 | * a page boundary. Make sure the identify sub-structure in the |
| 265 | * at structure does not cross a page boundary, just in case the |
| 266 | * part is AHCI-1.1 and can't handle multiple DRQ blocks. |
| 267 | */ |
| 268 | if (ap->ap_ata[0] == NULL) { |
| 269 | int pw2; |
| 270 | |
| 271 | for (pw2 = 1; pw2 < sizeof(*at); pw2 <<= 1) |
| 272 | ; |
| 273 | for (i = 0; i < AHCI_MAX_PMPORTS; ++i) { |
| 274 | at = kmalloc(pw2, M_DEVBUF, M_INTWAIT | M_ZERO); |
| 275 | ap->ap_ata[i] = at; |
| 276 | at->at_ahci_port = ap; |
| 277 | at->at_target = i; |
| 278 | at->at_probe = ATA_PROBE_NEED_INIT; |
| 279 | at->at_features |= ATA_PORT_F_RESCAN; |
| 280 | ksnprintf(at->at_name, sizeof(at->at_name), |
| 281 | "%s.%d", ap->ap_name, i); |
| 282 | } |
| 283 | } |
| 284 | if (bus_space_subregion(sc->sc_iot, sc->sc_ioh, |
| 285 | AHCI_PORT_REGION(port), AHCI_PORT_SIZE, &ap->ap_ioh) != 0) { |
| 286 | device_printf(sc->sc_dev, |
| 287 | "unable to create register window for port %d\n", |
| 288 | port); |
| 289 | goto freeport; |
| 290 | } |
| 291 | |
| 292 | ap->ap_sc = sc; |
| 293 | ap->ap_num = port; |
| 294 | ap->ap_probe = ATA_PROBE_NEED_INIT; |
| 295 | ap->link_pwr_mgmt = AHCI_LINK_PWR_MGMT_NONE; |
| 296 | ap->sysctl_tree = NULL; |
| 297 | TAILQ_INIT(&ap->ap_ccb_free); |
| 298 | TAILQ_INIT(&ap->ap_ccb_pending); |
| 299 | lockinit(&ap->ap_ccb_lock, "ahcipo", 0, 0); |
| 300 | |
| 301 | /* Disable port interrupts */ |
| 302 | ahci_pwrite(ap, AHCI_PREG_IE, 0); |
| 303 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 304 | |
| 305 | /* |
| 306 | * Sec 10.1.2 - deinitialise port if it is already running |
| 307 | */ |
| 308 | cmd = ahci_pread(ap, AHCI_PREG_CMD); |
| 309 | kprintf("%s: Caps %b\n", PORTNAME(ap), cmd, AHCI_PFMT_CMD); |
| 310 | |
| 311 | if ((cmd & (AHCI_PREG_CMD_ST | AHCI_PREG_CMD_CR | |
| 312 | AHCI_PREG_CMD_FRE | AHCI_PREG_CMD_FR)) || |
| 313 | (ahci_pread(ap, AHCI_PREG_SCTL) & AHCI_PREG_SCTL_DET)) { |
| 314 | int r; |
| 315 | |
| 316 | r = ahci_port_stop(ap, 1); |
| 317 | if (r) { |
| 318 | device_printf(sc->sc_dev, |
| 319 | "unable to disable %s, ignoring port %d\n", |
| 320 | ((r == 2) ? "CR" : "FR"), port); |
| 321 | rc = ENXIO; |
| 322 | goto freeport; |
| 323 | } |
| 324 | |
| 325 | /* Write DET to zero */ |
| 326 | ahci_pwrite(ap, AHCI_PREG_SCTL, AHCI_PREG_SCTL_IPM_DISABLED); |
| 327 | } |
| 328 | |
| 329 | /* Allocate RFIS */ |
| 330 | ap->ap_dmamem_rfis = ahci_dmamem_alloc(sc, sc->sc_tag_rfis); |
| 331 | if (ap->ap_dmamem_rfis == NULL) { |
| 332 | kprintf("%s: NORFIS\n", PORTNAME(ap)); |
| 333 | goto nomem; |
| 334 | } |
| 335 | |
| 336 | /* Setup RFIS base address */ |
| 337 | ap->ap_rfis = (struct ahci_rfis *) AHCI_DMA_KVA(ap->ap_dmamem_rfis); |
| 338 | dva = AHCI_DMA_DVA(ap->ap_dmamem_rfis); |
| 339 | ahci_pwrite(ap, AHCI_PREG_FBU, (u_int32_t)(dva >> 32)); |
| 340 | ahci_pwrite(ap, AHCI_PREG_FB, (u_int32_t)dva); |
| 341 | |
| 342 | /* Clear SERR before starting FIS reception or ST or anything */ |
| 343 | ahci_flush_tfd(ap); |
| 344 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 345 | |
| 346 | /* Enable FIS reception and activate port. */ |
| 347 | cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; |
| 348 | cmd &= ~(AHCI_PREG_CMD_CLO | AHCI_PREG_CMD_PMA); |
| 349 | cmd |= AHCI_PREG_CMD_FRE | AHCI_PREG_CMD_POD | AHCI_PREG_CMD_SUD; |
| 350 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd | AHCI_PREG_CMD_ICC_ACTIVE); |
| 351 | |
| 352 | /* Check whether port activated. Skip it if not. */ |
| 353 | cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; |
| 354 | if ((cmd & AHCI_PREG_CMD_FRE) == 0) { |
| 355 | kprintf("%s: NOT-ACTIVATED\n", PORTNAME(ap)); |
| 356 | rc = ENXIO; |
| 357 | goto freeport; |
| 358 | } |
| 359 | |
| 360 | /* Allocate a CCB for each command slot */ |
| 361 | ap->ap_ccbs = kmalloc(sizeof(struct ahci_ccb) * sc->sc_ncmds, M_DEVBUF, |
| 362 | M_WAITOK | M_ZERO); |
| 363 | if (ap->ap_ccbs == NULL) { |
| 364 | device_printf(sc->sc_dev, |
| 365 | "unable to allocate command list for port %d\n", |
| 366 | port); |
| 367 | goto freeport; |
| 368 | } |
| 369 | |
| 370 | /* Command List Structures and Command Tables */ |
| 371 | ap->ap_dmamem_cmd_list = ahci_dmamem_alloc(sc, sc->sc_tag_cmdh); |
| 372 | ap->ap_dmamem_cmd_table = ahci_dmamem_alloc(sc, sc->sc_tag_cmdt); |
| 373 | if (ap->ap_dmamem_cmd_table == NULL || |
| 374 | ap->ap_dmamem_cmd_list == NULL) { |
| 375 | nomem: |
| 376 | device_printf(sc->sc_dev, |
| 377 | "unable to allocate DMA memory for port %d\n", |
| 378 | port); |
| 379 | goto freeport; |
| 380 | } |
| 381 | |
| 382 | /* Setup command list base address */ |
| 383 | dva = AHCI_DMA_DVA(ap->ap_dmamem_cmd_list); |
| 384 | ahci_pwrite(ap, AHCI_PREG_CLBU, (u_int32_t)(dva >> 32)); |
| 385 | ahci_pwrite(ap, AHCI_PREG_CLB, (u_int32_t)dva); |
| 386 | |
| 387 | /* Split CCB allocation into CCBs and assign to command header/table */ |
| 388 | hdr = AHCI_DMA_KVA(ap->ap_dmamem_cmd_list); |
| 389 | table = AHCI_DMA_KVA(ap->ap_dmamem_cmd_table); |
| 390 | for (i = 0; i < sc->sc_ncmds; i++) { |
| 391 | ccb = &ap->ap_ccbs[i]; |
| 392 | |
| 393 | error = bus_dmamap_create(sc->sc_tag_data, BUS_DMA_ALLOCNOW, |
| 394 | &ccb->ccb_dmamap); |
| 395 | if (error) { |
| 396 | device_printf(sc->sc_dev, |
| 397 | "unable to create dmamap for port %d " |
| 398 | "ccb %d\n", port, i); |
| 399 | goto freeport; |
| 400 | } |
| 401 | |
| 402 | callout_init(&ccb->ccb_timeout); |
| 403 | ccb->ccb_slot = i; |
| 404 | ccb->ccb_port = ap; |
| 405 | ccb->ccb_cmd_hdr = &hdr[i]; |
| 406 | ccb->ccb_cmd_table = &table[i]; |
| 407 | dva = AHCI_DMA_DVA(ap->ap_dmamem_cmd_table) + |
| 408 | ccb->ccb_slot * sizeof(struct ahci_cmd_table); |
| 409 | ccb->ccb_cmd_hdr->ctba_hi = htole32((u_int32_t)(dva >> 32)); |
| 410 | ccb->ccb_cmd_hdr->ctba_lo = htole32((u_int32_t)dva); |
| 411 | |
| 412 | ccb->ccb_xa.fis = |
| 413 | (struct ata_fis_h2d *)ccb->ccb_cmd_table->cfis; |
| 414 | ccb->ccb_xa.packetcmd = ccb->ccb_cmd_table->acmd; |
| 415 | ccb->ccb_xa.tag = i; |
| 416 | |
| 417 | ccb->ccb_xa.state = ATA_S_COMPLETE; |
| 418 | |
| 419 | /* |
| 420 | * CCB[1] is the error CCB and is not get or put. It is |
| 421 | * also used for probing. Numerous HBAs only load the |
| 422 | * signature from CCB[1] so it MUST be used for the second |
| 423 | * FIS. |
| 424 | */ |
| 425 | if (i == 1) |
| 426 | ap->ap_err_ccb = ccb; |
| 427 | else |
| 428 | ahci_put_ccb(ccb); |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * Wait for ICC change to complete |
| 433 | */ |
| 434 | ahci_pwait_clr(ap, AHCI_PREG_CMD, AHCI_PREG_CMD_ICC); |
| 435 | |
| 436 | /* |
| 437 | * Calculate the interrupt mask |
| 438 | */ |
| 439 | data = AHCI_PREG_IE_TFEE | AHCI_PREG_IE_HBFE | |
| 440 | AHCI_PREG_IE_IFE | AHCI_PREG_IE_OFE | |
| 441 | AHCI_PREG_IE_DPE | AHCI_PREG_IE_UFE | |
| 442 | AHCI_PREG_IE_PCE | AHCI_PREG_IE_PRCE | |
| 443 | AHCI_PREG_IE_DHRE | AHCI_PREG_IE_SDBE; |
| 444 | if (ap->ap_sc->sc_cap & AHCI_REG_CAP_SSNTF) |
| 445 | data |= AHCI_PREG_IE_IPME; |
| 446 | #ifdef AHCI_COALESCE |
| 447 | if (sc->sc_ccc_ports & (1 << port) |
| 448 | data &= ~(AHCI_PREG_IE_SDBE | AHCI_PREG_IE_DHRE); |
| 449 | #endif |
| 450 | ap->ap_intmask = data; |
| 451 | |
| 452 | /* |
| 453 | * Start the port helper thread. The helper thread will call |
| 454 | * ahci_port_init() so the ports can all be started in parallel. |
| 455 | * A failure by ahci_port_init() does not deallocate the port |
| 456 | * since we still want hot-plug events. |
| 457 | */ |
| 458 | ahci_os_start_port(ap); |
| 459 | return(0); |
| 460 | freeport: |
| 461 | ahci_port_free(sc, port); |
| 462 | return (rc); |
| 463 | } |
| 464 | |
| 465 | /* |
| 466 | * [re]initialize an idle port. No CCBs should be active. (from port thread) |
| 467 | * |
| 468 | * This function is called during the initial port allocation sequence |
| 469 | * and is also called on hot-plug insertion. We take no chances and |
| 470 | * use a portreset instead of a softreset. |
| 471 | * |
| 472 | * This function is the only way to move a failed port back to active |
| 473 | * status. |
| 474 | * |
| 475 | * Returns 0 if a device is successfully detected. |
| 476 | */ |
| 477 | int |
| 478 | ahci_port_init(struct ahci_port *ap) |
| 479 | { |
| 480 | u_int32_t cmd; |
| 481 | |
| 482 | /* |
| 483 | * Register [re]initialization |
| 484 | * |
| 485 | * Flush the TFD and SERR and make sure the port is stopped before |
| 486 | * enabling its interrupt. We no longer cycle the port start as |
| 487 | * the port should not be started unless a device is present. |
| 488 | * |
| 489 | * XXX should we enable FIS reception? (FRE)? |
| 490 | */ |
| 491 | ahci_pwrite(ap, AHCI_PREG_IE, 0); |
| 492 | ahci_port_stop(ap, 0); |
| 493 | if (ap->ap_sc->sc_cap & AHCI_REG_CAP_SSNTF) |
| 494 | ahci_pwrite(ap, AHCI_PREG_SNTF, -1); |
| 495 | ahci_flush_tfd(ap); |
| 496 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 497 | |
| 498 | /* |
| 499 | * If we are being harsh try to kill the port completely. Normally |
| 500 | * we would want to hold on to some of the state the BIOS may have |
| 501 | * set, such as SUD (spin up device). |
| 502 | * |
| 503 | * AP_F_HARSH_REINIT is cleared in the hard reset state |
| 504 | */ |
| 505 | if (ap->ap_flags & AP_F_HARSH_REINIT) { |
| 506 | ahci_pwrite(ap, AHCI_PREG_SCTL, AHCI_PREG_SCTL_IPM_DISABLED); |
| 507 | ahci_pwrite(ap, AHCI_PREG_CMD, 0); |
| 508 | |
| 509 | ahci_os_sleep(1000); |
| 510 | |
| 511 | cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; |
| 512 | cmd &= ~(AHCI_PREG_CMD_CLO | AHCI_PREG_CMD_PMA); |
| 513 | cmd |= AHCI_PREG_CMD_FRE | AHCI_PREG_CMD_POD | |
| 514 | AHCI_PREG_CMD_SUD; |
| 515 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd | AHCI_PREG_CMD_ICC_ACTIVE); |
| 516 | cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; |
| 517 | if ((cmd & AHCI_PREG_CMD_FRE) == 0) { |
| 518 | kprintf("%s: Warning: FRE did not come up during " |
| 519 | "harsh reinitialization\n", |
| 520 | PORTNAME(ap)); |
| 521 | } |
| 522 | ahci_os_sleep(1000); |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | * Clear any pending garbage and re-enable the interrupt before |
| 527 | * going to the next stage. |
| 528 | */ |
| 529 | ap->ap_probe = ATA_PROBE_NEED_HARD_RESET; |
| 530 | ap->ap_pmcount = 0; |
| 531 | |
| 532 | if (ap->ap_sc->sc_cap & AHCI_REG_CAP_SSNTF) |
| 533 | ahci_pwrite(ap, AHCI_PREG_SNTF, -1); |
| 534 | ahci_flush_tfd(ap); |
| 535 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 536 | ahci_pwrite(ap, AHCI_PREG_IS, -1); |
| 537 | |
| 538 | ahci_port_interrupt_enable(ap); |
| 539 | |
| 540 | return (0); |
| 541 | } |
| 542 | |
| 543 | /* |
| 544 | * Enable or re-enable interrupts on a port. |
| 545 | * |
| 546 | * This routine is called from the port initialization code or from the |
| 547 | * helper thread as the real interrupt may be forced to turn off certain |
| 548 | * interrupt sources. |
| 549 | */ |
| 550 | void |
| 551 | ahci_port_interrupt_enable(struct ahci_port *ap) |
| 552 | { |
| 553 | ahci_pwrite(ap, AHCI_PREG_IE, ap->ap_intmask); |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * Manage the agressive link power management capability. |
| 558 | */ |
| 559 | void |
| 560 | ahci_port_link_pwr_mgmt(struct ahci_port *ap, int link_pwr_mgmt) |
| 561 | { |
| 562 | u_int32_t cmd, sctl; |
| 563 | |
| 564 | if (link_pwr_mgmt == ap->link_pwr_mgmt) |
| 565 | return; |
| 566 | |
| 567 | if ((ap->ap_sc->sc_cap & AHCI_REG_CAP_SALP) == 0) { |
| 568 | kprintf("%s: link power management not supported.\n", |
| 569 | PORTNAME(ap)); |
| 570 | return; |
| 571 | } |
| 572 | |
| 573 | ahci_os_lock_port(ap); |
| 574 | |
| 575 | if (link_pwr_mgmt == AHCI_LINK_PWR_MGMT_AGGR && |
| 576 | (ap->ap_sc->sc_cap & AHCI_REG_CAP_SSC)) { |
| 577 | kprintf("%s: enabling aggressive link power management.\n", |
| 578 | PORTNAME(ap)); |
| 579 | |
| 580 | ap->link_pwr_mgmt = link_pwr_mgmt; |
| 581 | |
| 582 | ap->ap_intmask &= ~AHCI_PREG_IE_PRCE; |
| 583 | ahci_port_interrupt_enable(ap); |
| 584 | |
| 585 | sctl = ahci_pread(ap, AHCI_PREG_SCTL); |
| 586 | sctl &= ~(AHCI_PREG_SCTL_IPM_DISABLED); |
| 587 | ahci_pwrite(ap, AHCI_PREG_SCTL, sctl); |
| 588 | |
| 589 | /* |
| 590 | * Enable device initiated link power management for |
| 591 | * directly attached devices that support it. |
| 592 | */ |
| 593 | if (ap->ap_type != ATA_PORT_T_PM && |
| 594 | ap->ap_ata[0]->at_identify.satafsup & (1 << 3)) { |
| 595 | if (ahci_set_feature(ap, NULL, ATA_SATAFT_DEVIPS, 1)) |
| 596 | kprintf("%s: Could not enable device initiated " |
| 597 | "link power management.\n", |
| 598 | PORTNAME(ap)); |
| 599 | } |
| 600 | |
| 601 | cmd = ahci_pread(ap, AHCI_PREG_CMD); |
| 602 | cmd |= AHCI_PREG_CMD_ASP; |
| 603 | cmd |= AHCI_PREG_CMD_ALPE; |
| 604 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 605 | |
| 606 | } else if (link_pwr_mgmt == AHCI_LINK_PWR_MGMT_MEDIUM && |
| 607 | (ap->ap_sc->sc_cap & AHCI_REG_CAP_PSC)) { |
| 608 | kprintf("%s: enabling medium link power management.\n", |
| 609 | PORTNAME(ap)); |
| 610 | |
| 611 | ap->link_pwr_mgmt = link_pwr_mgmt; |
| 612 | |
| 613 | ap->ap_intmask &= ~AHCI_PREG_IE_PRCE; |
| 614 | ahci_port_interrupt_enable(ap); |
| 615 | |
| 616 | sctl = ahci_pread(ap, AHCI_PREG_SCTL); |
| 617 | sctl |= AHCI_PREG_SCTL_IPM_DISABLED; |
| 618 | sctl &= ~AHCI_PREG_SCTL_IPM_NOPARTIAL; |
| 619 | ahci_pwrite(ap, AHCI_PREG_SCTL, sctl); |
| 620 | |
| 621 | cmd = ahci_pread(ap, AHCI_PREG_CMD); |
| 622 | cmd &= ~AHCI_PREG_CMD_ASP; |
| 623 | cmd |= AHCI_PREG_CMD_ALPE; |
| 624 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 625 | |
| 626 | } else if (link_pwr_mgmt == AHCI_LINK_PWR_MGMT_NONE) { |
| 627 | kprintf("%s: disabling link power management.\n", |
| 628 | PORTNAME(ap)); |
| 629 | |
| 630 | /* Disable device initiated link power management */ |
| 631 | if (ap->ap_type != ATA_PORT_T_PM && |
| 632 | ap->ap_ata[0]->at_identify.satafsup & (1 << 3)) |
| 633 | ahci_set_feature(ap, NULL, ATA_SATAFT_DEVIPS, 0); |
| 634 | |
| 635 | cmd = ahci_pread(ap, AHCI_PREG_CMD); |
| 636 | cmd &= ~(AHCI_PREG_CMD_ALPE | AHCI_PREG_CMD_ASP); |
| 637 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 638 | |
| 639 | sctl = ahci_pread(ap, AHCI_PREG_SCTL); |
| 640 | sctl |= AHCI_PREG_SCTL_IPM_DISABLED; |
| 641 | ahci_pwrite(ap, AHCI_PREG_SCTL, sctl); |
| 642 | |
| 643 | /* let the drive come back to avoid PRCS interrupts later */ |
| 644 | ahci_os_unlock_port(ap); |
| 645 | ahci_os_sleep(1000); |
| 646 | ahci_os_lock_port(ap); |
| 647 | |
| 648 | ahci_pwrite(ap, AHCI_PREG_SERR, |
| 649 | AHCI_PREG_SERR_DIAG_N | AHCI_PREG_SERR_DIAG_W); |
| 650 | ahci_pwrite(ap, AHCI_PREG_IS, AHCI_PREG_IS_PRCS); |
| 651 | |
| 652 | ap->ap_intmask |= AHCI_PREG_IE_PRCE; |
| 653 | ahci_port_interrupt_enable(ap); |
| 654 | |
| 655 | ap->link_pwr_mgmt = link_pwr_mgmt; |
| 656 | } else { |
| 657 | kprintf("%s: unsupported link power management state %d.\n", |
| 658 | PORTNAME(ap), link_pwr_mgmt); |
| 659 | } |
| 660 | |
| 661 | ahci_os_unlock_port(ap); |
| 662 | } |
| 663 | |
| 664 | /* |
| 665 | * Return current link power state. |
| 666 | */ |
| 667 | int |
| 668 | ahci_port_link_pwr_state(struct ahci_port *ap) |
| 669 | { |
| 670 | uint32_t r; |
| 671 | |
| 672 | r = ahci_pread(ap, AHCI_PREG_SSTS); |
| 673 | switch (r & SATA_PM_SSTS_IPM) { |
| 674 | case SATA_PM_SSTS_IPM_ACTIVE: |
| 675 | return 1; |
| 676 | case SATA_PM_SSTS_IPM_PARTIAL: |
| 677 | return 2; |
| 678 | case SATA_PM_SSTS_IPM_SLUMBER: |
| 679 | return 3; |
| 680 | default: |
| 681 | return 0; |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | /* |
| 686 | * Run the port / target state machine from a main context. |
| 687 | * |
| 688 | * The state machine for the port is always run. |
| 689 | * |
| 690 | * If atx is non-NULL run the state machine for a particular target. |
| 691 | * If atx is NULL run the state machine for all targets. |
| 692 | */ |
| 693 | void |
| 694 | ahci_port_state_machine(struct ahci_port *ap, int initial) |
| 695 | { |
| 696 | struct ata_port *at; |
| 697 | u_int32_t data; |
| 698 | int target; |
| 699 | int didsleep; |
| 700 | int loop; |
| 701 | |
| 702 | /* |
| 703 | * State machine for port. Note that CAM is not yet associated |
| 704 | * during the initial parallel probe and the port's probe state |
| 705 | * will not get past ATA_PROBE_NEED_IDENT. |
| 706 | */ |
| 707 | { |
| 708 | if (initial == 0 && ap->ap_probe <= ATA_PROBE_NEED_HARD_RESET) { |
| 709 | kprintf("%s: Waiting 10 seconds on insertion\n", |
| 710 | PORTNAME(ap)); |
| 711 | ahci_os_sleep(10000); |
| 712 | initial = 1; |
| 713 | } |
| 714 | if (ap->ap_probe == ATA_PROBE_NEED_INIT) |
| 715 | ahci_port_init(ap); |
| 716 | if (ap->ap_probe == ATA_PROBE_NEED_HARD_RESET) |
| 717 | ahci_port_reset(ap, NULL, 1); |
| 718 | if (ap->ap_probe == ATA_PROBE_NEED_SOFT_RESET) |
| 719 | ahci_port_reset(ap, NULL, 0); |
| 720 | if (ap->ap_probe == ATA_PROBE_NEED_IDENT) |
| 721 | ahci_cam_probe(ap, NULL); |
| 722 | } |
| 723 | if (ap->ap_type != ATA_PORT_T_PM) { |
| 724 | if (ap->ap_probe == ATA_PROBE_FAILED) { |
| 725 | ahci_cam_changed(ap, NULL, 0); |
| 726 | } else if (ap->ap_probe >= ATA_PROBE_NEED_IDENT) { |
| 727 | ahci_cam_changed(ap, NULL, 1); |
| 728 | } |
| 729 | return; |
| 730 | } |
| 731 | |
| 732 | /* |
| 733 | * Port Multiplier state machine. |
| 734 | * |
| 735 | * Get a mask of changed targets and combine with any runnable |
| 736 | * states already present. |
| 737 | */ |
| 738 | for (loop = 0; ;++loop) { |
| 739 | if (ahci_pm_read(ap, 15, SATA_PMREG_EINFO, &data)) { |
| 740 | kprintf("%s: PM unable to read hot-plug bitmap\n", |
| 741 | PORTNAME(ap)); |
| 742 | break; |
| 743 | } |
| 744 | |
| 745 | /* |
| 746 | * Do at least one loop, then stop if no more state changes |
| 747 | * have occured. The PM might not generate a new |
| 748 | * notification until we clear the entire bitmap. |
| 749 | */ |
| 750 | if (loop && data == 0) |
| 751 | break; |
| 752 | |
| 753 | /* |
| 754 | * New devices showing up in the bitmap require some spin-up |
| 755 | * time before we start probing them. Reset didsleep. The |
| 756 | * first new device we detect will sleep before probing. |
| 757 | * |
| 758 | * This only applies to devices whos change bit is set in |
| 759 | * the data, and does not apply to the initial boot-time |
| 760 | * probe. |
| 761 | */ |
| 762 | didsleep = 0; |
| 763 | |
| 764 | for (target = 0; target < ap->ap_pmcount; ++target) { |
| 765 | at = ap->ap_ata[target]; |
| 766 | |
| 767 | /* |
| 768 | * Check the target state for targets behind the PM |
| 769 | * which have changed state. This will adjust |
| 770 | * at_probe and set ATA_PORT_F_RESCAN |
| 771 | * |
| 772 | * We want to wait at least 10 seconds before probing |
| 773 | * a newly inserted device. If the check status |
| 774 | * indicates a device is present and in need of a |
| 775 | * hard reset, we make sure we have slept before |
| 776 | * continuing. |
| 777 | * |
| 778 | * We also need to wait at least 1 second for the |
| 779 | * PHY state to change after insertion, if we |
| 780 | * haven't already waited the 10 seconds. |
| 781 | * |
| 782 | * NOTE: When pm_check_good finds a good port it |
| 783 | * typically starts us in probe state |
| 784 | * NEED_HARD_RESET rather than INIT. |
| 785 | */ |
| 786 | if (data & (1 << target)) { |
| 787 | if (initial == 0 && didsleep == 0) |
| 788 | ahci_os_sleep(1000); |
| 789 | ahci_pm_check_good(ap, target); |
| 790 | if (initial == 0 && didsleep == 0 && |
| 791 | at->at_probe <= ATA_PROBE_NEED_HARD_RESET |
| 792 | ) { |
| 793 | didsleep = 1; |
| 794 | kprintf("%s: Waiting 10 seconds on insertion\n", PORTNAME(ap)); |
| 795 | ahci_os_sleep(10000); |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | /* |
| 800 | * Report hot-plug events before the probe state |
| 801 | * really gets hot. Only actual events are reported |
| 802 | * here to reduce spew. |
| 803 | */ |
| 804 | if (data & (1 << target)) { |
| 805 | kprintf("%s: HOTPLUG (PM) - ", ATANAME(ap, at)); |
| 806 | switch(at->at_probe) { |
| 807 | case ATA_PROBE_NEED_INIT: |
| 808 | case ATA_PROBE_NEED_HARD_RESET: |
| 809 | kprintf("Device inserted\n"); |
| 810 | break; |
| 811 | case ATA_PROBE_FAILED: |
| 812 | kprintf("Device removed\n"); |
| 813 | break; |
| 814 | default: |
| 815 | kprintf("Device probe in progress\n"); |
| 816 | break; |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | /* |
| 821 | * Run through the state machine as necessary if |
| 822 | * the port is not marked failed. |
| 823 | * |
| 824 | * The state machine may stop at NEED_IDENT if |
| 825 | * CAM is not yet attached. |
| 826 | * |
| 827 | * Acquire exclusive access to the port while we |
| 828 | * are doing this. This prevents command-completion |
| 829 | * from queueing commands for non-polled targets |
| 830 | * inbetween our probe steps. We need to do this |
| 831 | * because the reset probes can generate severe PHY |
| 832 | * and protocol errors and soft-brick the port. |
| 833 | */ |
| 834 | if (at->at_probe != ATA_PROBE_FAILED && |
| 835 | at->at_probe != ATA_PROBE_GOOD) { |
| 836 | ahci_beg_exclusive_access(ap, at); |
| 837 | if (at->at_probe == ATA_PROBE_NEED_INIT) |
| 838 | ahci_pm_port_init(ap, at); |
| 839 | if (at->at_probe == ATA_PROBE_NEED_HARD_RESET) |
| 840 | ahci_port_reset(ap, at, 1); |
| 841 | if (at->at_probe == ATA_PROBE_NEED_SOFT_RESET) |
| 842 | ahci_port_reset(ap, at, 0); |
| 843 | if (at->at_probe == ATA_PROBE_NEED_IDENT) |
| 844 | ahci_cam_probe(ap, at); |
| 845 | ahci_end_exclusive_access(ap, at); |
| 846 | } |
| 847 | |
| 848 | /* |
| 849 | * Add or remove from CAM |
| 850 | */ |
| 851 | if (at->at_features & ATA_PORT_F_RESCAN) { |
| 852 | at->at_features &= ~ATA_PORT_F_RESCAN; |
| 853 | if (at->at_probe == ATA_PROBE_FAILED) { |
| 854 | ahci_cam_changed(ap, at, 0); |
| 855 | } else if (at->at_probe >= ATA_PROBE_NEED_IDENT) { |
| 856 | ahci_cam_changed(ap, at, 1); |
| 857 | } |
| 858 | } |
| 859 | data &= ~(1 << target); |
| 860 | } |
| 861 | if (data) { |
| 862 | kprintf("%s: WARNING (PM): extra bits set in " |
| 863 | "EINFO: %08x\n", PORTNAME(ap), data); |
| 864 | while (target < AHCI_MAX_PMPORTS) { |
| 865 | ahci_pm_check_good(ap, target); |
| 866 | ++target; |
| 867 | } |
| 868 | } |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | |
| 873 | /* |
| 874 | * De-initialize and detach a port. |
| 875 | */ |
| 876 | void |
| 877 | ahci_port_free(struct ahci_softc *sc, u_int port) |
| 878 | { |
| 879 | struct ahci_port *ap = sc->sc_ports[port]; |
| 880 | struct ahci_ccb *ccb; |
| 881 | int i; |
| 882 | |
| 883 | /* |
| 884 | * Ensure port is disabled and its interrupts are all flushed. |
| 885 | */ |
| 886 | if (ap->ap_sc) { |
| 887 | ahci_port_stop(ap, 1); |
| 888 | ahci_os_stop_port(ap); |
| 889 | ahci_pwrite(ap, AHCI_PREG_CMD, 0); |
| 890 | ahci_pwrite(ap, AHCI_PREG_IE, 0); |
| 891 | ahci_pwrite(ap, AHCI_PREG_IS, ahci_pread(ap, AHCI_PREG_IS)); |
| 892 | ahci_write(sc, AHCI_REG_IS, 1 << port); |
| 893 | } |
| 894 | |
| 895 | if (ap->ap_ccbs) { |
| 896 | while ((ccb = ahci_get_ccb(ap)) != NULL) { |
| 897 | if (ccb->ccb_dmamap) { |
| 898 | bus_dmamap_destroy(sc->sc_tag_data, |
| 899 | ccb->ccb_dmamap); |
| 900 | ccb->ccb_dmamap = NULL; |
| 901 | } |
| 902 | } |
| 903 | if ((ccb = ap->ap_err_ccb) != NULL) { |
| 904 | if (ccb->ccb_dmamap) { |
| 905 | bus_dmamap_destroy(sc->sc_tag_data, |
| 906 | ccb->ccb_dmamap); |
| 907 | ccb->ccb_dmamap = NULL; |
| 908 | } |
| 909 | ap->ap_err_ccb = NULL; |
| 910 | } |
| 911 | kfree(ap->ap_ccbs, M_DEVBUF); |
| 912 | ap->ap_ccbs = NULL; |
| 913 | } |
| 914 | |
| 915 | if (ap->ap_dmamem_cmd_list) { |
| 916 | ahci_dmamem_free(sc, ap->ap_dmamem_cmd_list); |
| 917 | ap->ap_dmamem_cmd_list = NULL; |
| 918 | } |
| 919 | if (ap->ap_dmamem_rfis) { |
| 920 | ahci_dmamem_free(sc, ap->ap_dmamem_rfis); |
| 921 | ap->ap_dmamem_rfis = NULL; |
| 922 | } |
| 923 | if (ap->ap_dmamem_cmd_table) { |
| 924 | ahci_dmamem_free(sc, ap->ap_dmamem_cmd_table); |
| 925 | ap->ap_dmamem_cmd_table = NULL; |
| 926 | } |
| 927 | if (ap->ap_ata) { |
| 928 | for (i = 0; i < AHCI_MAX_PMPORTS; ++i) { |
| 929 | if (ap->ap_ata[i]) { |
| 930 | kfree(ap->ap_ata[i], M_DEVBUF); |
| 931 | ap->ap_ata[i] = NULL; |
| 932 | } |
| 933 | } |
| 934 | } |
| 935 | if (ap->ap_err_scratch) { |
| 936 | kfree(ap->ap_err_scratch, M_DEVBUF); |
| 937 | ap->ap_err_scratch = NULL; |
| 938 | } |
| 939 | |
| 940 | /* bus_space(9) says we dont free the subregions handle */ |
| 941 | |
| 942 | kfree(ap, M_DEVBUF); |
| 943 | sc->sc_ports[port] = NULL; |
| 944 | } |
| 945 | |
| 946 | static |
| 947 | u_int32_t |
| 948 | ahci_pactive(struct ahci_port *ap) |
| 949 | { |
| 950 | u_int32_t mask; |
| 951 | |
| 952 | mask = ahci_pread(ap, AHCI_PREG_CI); |
| 953 | if (ap->ap_sc->sc_cap & AHCI_REG_CAP_SNCQ) |
| 954 | mask |= ahci_pread(ap, AHCI_PREG_SACT); |
| 955 | return(mask); |
| 956 | } |
| 957 | |
| 958 | /* |
| 959 | * Start high-level command processing on the port |
| 960 | */ |
| 961 | int |
| 962 | ahci_port_start(struct ahci_port *ap) |
| 963 | { |
| 964 | u_int32_t r, s, is, tfd; |
| 965 | |
| 966 | /* |
| 967 | * FRE must be turned on before ST. Wait for FR to go active |
| 968 | * before turning on ST. The spec doesn't seem to think this |
| 969 | * is necessary but waiting here avoids an on-off race in the |
| 970 | * ahci_port_stop() code. |
| 971 | */ |
| 972 | r = ahci_pread(ap, AHCI_PREG_CMD); |
| 973 | if ((r & AHCI_PREG_CMD_FRE) == 0) { |
| 974 | r |= AHCI_PREG_CMD_FRE; |
| 975 | ahci_pwrite(ap, AHCI_PREG_CMD, r); |
| 976 | } |
| 977 | if ((ap->ap_sc->sc_flags & AHCI_F_IGN_FR) == 0) { |
| 978 | if (ahci_pwait_set(ap, AHCI_PREG_CMD, AHCI_PREG_CMD_FR)) { |
| 979 | kprintf("%s: Cannot start FIS reception\n", |
| 980 | PORTNAME(ap)); |
| 981 | return (2); |
| 982 | } |
| 983 | } else { |
| 984 | ahci_os_sleep(10); |
| 985 | } |
| 986 | |
| 987 | /* |
| 988 | * Turn on ST, wait for CR to come up. |
| 989 | */ |
| 990 | r |= AHCI_PREG_CMD_ST; |
| 991 | ahci_pwrite(ap, AHCI_PREG_CMD, r); |
| 992 | if (ahci_pwait_set_to(ap, 2000, AHCI_PREG_CMD, AHCI_PREG_CMD_CR)) { |
| 993 | s = ahci_pread(ap, AHCI_PREG_SERR); |
| 994 | is = ahci_pread(ap, AHCI_PREG_IS); |
| 995 | tfd = ahci_pread(ap, AHCI_PREG_TFD); |
| 996 | kprintf("%s: Cannot start command DMA\n" |
| 997 | "NCMP=%b NSERR=%b\n" |
| 998 | "NEWIS=%b\n" |
| 999 | "NEWTFD=%b\n", |
| 1000 | PORTNAME(ap), |
| 1001 | r, AHCI_PFMT_CMD, s, AHCI_PFMT_SERR, |
| 1002 | is, AHCI_PFMT_IS, |
| 1003 | tfd, AHCI_PFMT_TFD_STS); |
| 1004 | return (1); |
| 1005 | } |
| 1006 | |
| 1007 | #ifdef AHCI_COALESCE |
| 1008 | /* |
| 1009 | * (Re-)enable coalescing on the port. |
| 1010 | */ |
| 1011 | if (ap->ap_sc->sc_ccc_ports & (1 << ap->ap_num)) { |
| 1012 | ap->ap_sc->sc_ccc_ports_cur |= (1 << ap->ap_num); |
| 1013 | ahci_write(ap->ap_sc, AHCI_REG_CCC_PORTS, |
| 1014 | ap->ap_sc->sc_ccc_ports_cur); |
| 1015 | } |
| 1016 | #endif |
| 1017 | |
| 1018 | return (0); |
| 1019 | } |
| 1020 | |
| 1021 | /* |
| 1022 | * Stop high-level command processing on a port |
| 1023 | * |
| 1024 | * WARNING! If the port is stopped while CR is still active our saved |
| 1025 | * CI/SACT will race any commands completed by the command |
| 1026 | * processor prior to being able to stop. Thus we never call |
| 1027 | * this function unless we intend to dispose of any remaining |
| 1028 | * active commands. In particular, this complicates the timeout |
| 1029 | * code. |
| 1030 | */ |
| 1031 | int |
| 1032 | ahci_port_stop(struct ahci_port *ap, int stop_fis_rx) |
| 1033 | { |
| 1034 | u_int32_t r; |
| 1035 | |
| 1036 | #ifdef AHCI_COALESCE |
| 1037 | /* |
| 1038 | * Disable coalescing on the port while it is stopped. |
| 1039 | */ |
| 1040 | if (ap->ap_sc->sc_ccc_ports & (1 << ap->ap_num)) { |
| 1041 | ap->ap_sc->sc_ccc_ports_cur &= ~(1 << ap->ap_num); |
| 1042 | ahci_write(ap->ap_sc, AHCI_REG_CCC_PORTS, |
| 1043 | ap->ap_sc->sc_ccc_ports_cur); |
| 1044 | } |
| 1045 | #endif |
| 1046 | |
| 1047 | /* |
| 1048 | * Turn off ST, then wait for CR to go off. |
| 1049 | */ |
| 1050 | r = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; |
| 1051 | r &= ~AHCI_PREG_CMD_ST; |
| 1052 | ahci_pwrite(ap, AHCI_PREG_CMD, r); |
| 1053 | |
| 1054 | if (ahci_pwait_clr(ap, AHCI_PREG_CMD, AHCI_PREG_CMD_CR)) { |
| 1055 | kprintf("%s: Port bricked, unable to stop (ST)\n", |
| 1056 | PORTNAME(ap)); |
| 1057 | return (1); |
| 1058 | } |
| 1059 | |
| 1060 | #if 0 |
| 1061 | /* |
| 1062 | * Turn off FRE, then wait for FR to go off. FRE cannot |
| 1063 | * be turned off until CR transitions to 0. |
| 1064 | */ |
| 1065 | if ((r & AHCI_PREG_CMD_FR) == 0) { |
| 1066 | kprintf("%s: FR stopped, clear FRE for next start\n", |
| 1067 | PORTNAME(ap)); |
| 1068 | stop_fis_rx = 2; |
| 1069 | } |
| 1070 | #endif |
| 1071 | if (stop_fis_rx) { |
| 1072 | r &= ~AHCI_PREG_CMD_FRE; |
| 1073 | ahci_pwrite(ap, AHCI_PREG_CMD, r); |
| 1074 | if (ahci_pwait_clr(ap, AHCI_PREG_CMD, AHCI_PREG_CMD_FR)) { |
| 1075 | kprintf("%s: Port bricked, unable to stop (FRE)\n", |
| 1076 | PORTNAME(ap)); |
| 1077 | return (2); |
| 1078 | } |
| 1079 | } |
| 1080 | |
| 1081 | return (0); |
| 1082 | } |
| 1083 | |
| 1084 | /* |
| 1085 | * AHCI command list override -> forcibly clear TFD.STS.{BSY,DRQ} |
| 1086 | */ |
| 1087 | int |
| 1088 | ahci_port_clo(struct ahci_port *ap) |
| 1089 | { |
| 1090 | struct ahci_softc *sc = ap->ap_sc; |
| 1091 | u_int32_t cmd; |
| 1092 | |
| 1093 | /* Only attempt CLO if supported by controller */ |
| 1094 | if ((ahci_read(sc, AHCI_REG_CAP) & AHCI_REG_CAP_SCLO) == 0) |
| 1095 | return (1); |
| 1096 | |
| 1097 | /* Issue CLO */ |
| 1098 | cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; |
| 1099 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd | AHCI_PREG_CMD_CLO); |
| 1100 | |
| 1101 | /* Wait for completion */ |
| 1102 | if (ahci_pwait_clr(ap, AHCI_PREG_CMD, AHCI_PREG_CMD_CLO)) { |
| 1103 | kprintf("%s: CLO did not complete\n", PORTNAME(ap)); |
| 1104 | return (1); |
| 1105 | } |
| 1106 | |
| 1107 | return (0); |
| 1108 | } |
| 1109 | |
| 1110 | /* |
| 1111 | * Reset a port. |
| 1112 | * |
| 1113 | * If hard is 0 perform a softreset of the port. |
| 1114 | * If hard is 1 perform a hard reset of the port. |
| 1115 | * |
| 1116 | * If at is non-NULL an indirect port via a port-multiplier is being |
| 1117 | * reset, otherwise a direct port is being reset. |
| 1118 | * |
| 1119 | * NOTE: Indirect ports can only be soft-reset. |
| 1120 | */ |
| 1121 | int |
| 1122 | ahci_port_reset(struct ahci_port *ap, struct ata_port *at, int hard) |
| 1123 | { |
| 1124 | int rc; |
| 1125 | |
| 1126 | if (hard) { |
| 1127 | if (at) |
| 1128 | rc = ahci_pm_hardreset(ap, at->at_target, hard); |
| 1129 | else |
| 1130 | rc = ahci_port_hardreset(ap, hard); |
| 1131 | } else { |
| 1132 | if (at) |
| 1133 | rc = ahci_pm_softreset(ap, at->at_target); |
| 1134 | else |
| 1135 | rc = ahci_port_softreset(ap); |
| 1136 | } |
| 1137 | return(rc); |
| 1138 | } |
| 1139 | |
| 1140 | /* |
| 1141 | * AHCI soft reset, Section 10.4.1 |
| 1142 | * |
| 1143 | * (at) will be NULL when soft-resetting a directly-attached device, and |
| 1144 | * non-NULL when soft-resetting a device through a port multiplier. |
| 1145 | * |
| 1146 | * This function keeps port communications intact and attempts to generate |
| 1147 | * a reset to the connected device using device commands. |
| 1148 | */ |
| 1149 | int |
| 1150 | ahci_port_softreset(struct ahci_port *ap) |
| 1151 | { |
| 1152 | struct ahci_ccb *ccb = NULL; |
| 1153 | struct ahci_cmd_hdr *cmd_slot; |
| 1154 | u_int8_t *fis; |
| 1155 | int error; |
| 1156 | |
| 1157 | error = EIO; |
| 1158 | |
| 1159 | if (bootverbose) { |
| 1160 | kprintf("%s: START SOFTRESET %b\n", PORTNAME(ap), |
| 1161 | ahci_pread(ap, AHCI_PREG_CMD), AHCI_PFMT_CMD); |
| 1162 | } |
| 1163 | |
| 1164 | DPRINTF(AHCI_D_VERBOSE, "%s: soft reset\n", PORTNAME(ap)); |
| 1165 | |
| 1166 | crit_enter(); |
| 1167 | ap->ap_flags |= AP_F_IN_RESET; |
| 1168 | ap->ap_state = AP_S_NORMAL; |
| 1169 | |
| 1170 | /* |
| 1171 | * Remember port state in cmd (main to restore start/stop) |
| 1172 | * |
| 1173 | * Idle port. |
| 1174 | */ |
| 1175 | if (ahci_port_stop(ap, 0)) { |
| 1176 | kprintf("%s: failed to stop port, cannot softreset\n", |
| 1177 | PORTNAME(ap)); |
| 1178 | goto err; |
| 1179 | } |
| 1180 | |
| 1181 | /* |
| 1182 | * Request CLO if device appears hung. |
| 1183 | */ |
| 1184 | if (ahci_pread(ap, AHCI_PREG_TFD) & |
| 1185 | (AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { |
| 1186 | ahci_port_clo(ap); |
| 1187 | } |
| 1188 | |
| 1189 | /* |
| 1190 | * This is an attempt to clear errors so a new signature will |
| 1191 | * be latched. It isn't working properly. XXX |
| 1192 | */ |
| 1193 | ahci_flush_tfd(ap); |
| 1194 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 1195 | |
| 1196 | /* Restart port */ |
| 1197 | if (ahci_port_start(ap)) { |
| 1198 | kprintf("%s: failed to start port, cannot softreset\n", |
| 1199 | PORTNAME(ap)); |
| 1200 | goto err; |
| 1201 | } |
| 1202 | |
| 1203 | /* Check whether CLO worked */ |
| 1204 | if (ahci_pwait_clr(ap, AHCI_PREG_TFD, |
| 1205 | AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { |
| 1206 | kprintf("%s: CLO %s, need port reset\n", |
| 1207 | PORTNAME(ap), |
| 1208 | (ahci_read(ap->ap_sc, AHCI_REG_CAP) & AHCI_REG_CAP_SCLO) |
| 1209 | ? "failed" : "unsupported"); |
| 1210 | error = EBUSY; |
| 1211 | goto err; |
| 1212 | } |
| 1213 | |
| 1214 | /* |
| 1215 | * Prep first D2H command with SRST feature & clear busy/reset flags |
| 1216 | * |
| 1217 | * It is unclear which other fields in the FIS are used. Just zero |
| 1218 | * everything. |
| 1219 | * |
| 1220 | * NOTE! This CCB is used for both the first and second commands. |
| 1221 | * The second command must use CCB slot 1 to properly load |
| 1222 | * the signature. |
| 1223 | */ |
| 1224 | ccb = ahci_get_err_ccb(ap); |
| 1225 | ccb->ccb_xa.complete = ahci_dummy_done; |
| 1226 | ccb->ccb_xa.flags = ATA_F_POLL | ATA_F_EXCLUSIVE; |
| 1227 | KKASSERT(ccb->ccb_slot == 1); |
| 1228 | ccb->ccb_xa.at = NULL; |
| 1229 | cmd_slot = ccb->ccb_cmd_hdr; |
| 1230 | |
| 1231 | fis = ccb->ccb_cmd_table->cfis; |
| 1232 | bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); |
| 1233 | fis[0] = ATA_FIS_TYPE_H2D; |
| 1234 | fis[15] = ATA_FIS_CONTROL_SRST|ATA_FIS_CONTROL_4BIT; |
| 1235 | |
| 1236 | cmd_slot->prdtl = 0; |
| 1237 | cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ |
| 1238 | cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_C); /* Clear busy on OK */ |
| 1239 | cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_R); /* Reset */ |
| 1240 | |
| 1241 | ccb->ccb_xa.state = ATA_S_PENDING; |
| 1242 | |
| 1243 | if (ahci_poll(ccb, 1000, ahci_quick_timeout) != ATA_S_COMPLETE) { |
| 1244 | kprintf("%s: First FIS failed\n", PORTNAME(ap)); |
| 1245 | goto err; |
| 1246 | } |
| 1247 | |
| 1248 | /* |
| 1249 | * WARNING! TIME SENSITIVE SPACE! WARNING! |
| 1250 | * |
| 1251 | * The two FISes are supposed to be back to back. Don't issue other |
| 1252 | * commands or even delay if we can help it. |
| 1253 | */ |
| 1254 | |
| 1255 | /* |
| 1256 | * Prep second D2H command to read status and complete reset sequence |
| 1257 | * AHCI 10.4.1 and "Serial ATA Revision 2.6". I can't find the ATA |
| 1258 | * Rev 2.6 and it is unclear how the second FIS should be set up |
| 1259 | * from the AHCI document. |
| 1260 | * |
| 1261 | * It is unclear which other fields in the FIS are used. Just zero |
| 1262 | * everything. |
| 1263 | */ |
| 1264 | ccb->ccb_xa.flags = ATA_F_POLL | ATA_F_AUTOSENSE | ATA_F_EXCLUSIVE; |
| 1265 | |
| 1266 | bzero(fis, sizeof(ccb->ccb_cmd_table->cfis)); |
| 1267 | fis[0] = ATA_FIS_TYPE_H2D; |
| 1268 | fis[15] = ATA_FIS_CONTROL_4BIT; |
| 1269 | |
| 1270 | cmd_slot->prdtl = 0; |
| 1271 | cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ |
| 1272 | |
| 1273 | ccb->ccb_xa.state = ATA_S_PENDING; |
| 1274 | if (ahci_poll(ccb, 1000, ahci_quick_timeout) != ATA_S_COMPLETE) { |
| 1275 | kprintf("%s: Second FIS failed\n", PORTNAME(ap)); |
| 1276 | goto err; |
| 1277 | } |
| 1278 | |
| 1279 | if (ahci_pwait_clr(ap, AHCI_PREG_TFD, |
| 1280 | AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { |
| 1281 | kprintf("%s: device didn't come ready after reset, TFD: 0x%b\n", |
| 1282 | PORTNAME(ap), |
| 1283 | ahci_pread(ap, AHCI_PREG_TFD), AHCI_PFMT_TFD_STS); |
| 1284 | error = EBUSY; |
| 1285 | goto err; |
| 1286 | } |
| 1287 | |
| 1288 | /* |
| 1289 | * If the softreset is trying to clear a BSY condition after a |
| 1290 | * normal portreset we assign the port type. |
| 1291 | * |
| 1292 | * If the softreset is being run first as part of the ccb error |
| 1293 | * processing code then report if the device signature changed |
| 1294 | * unexpectedly. |
| 1295 | */ |
| 1296 | ahci_os_sleep(100); |
| 1297 | if (ap->ap_type == ATA_PORT_T_NONE) { |
| 1298 | ap->ap_type = ahci_port_signature_detect(ap, NULL); |
| 1299 | } else { |
| 1300 | if (ahci_port_signature_detect(ap, NULL) != ap->ap_type) { |
| 1301 | kprintf("%s: device signature unexpectedly " |
| 1302 | "changed\n", PORTNAME(ap)); |
| 1303 | error = EBUSY; /* XXX */ |
| 1304 | } |
| 1305 | } |
| 1306 | error = 0; |
| 1307 | |
| 1308 | ahci_os_sleep(3); |
| 1309 | err: |
| 1310 | if (ccb != NULL) { |
| 1311 | ahci_put_err_ccb(ccb); |
| 1312 | |
| 1313 | /* |
| 1314 | * If the target is busy use CLO to clear the busy |
| 1315 | * condition. The BSY should be cleared on the next |
| 1316 | * start. |
| 1317 | */ |
| 1318 | if (ahci_pread(ap, AHCI_PREG_TFD) & |
| 1319 | (AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { |
| 1320 | ahci_port_clo(ap); |
| 1321 | } |
| 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * If we failed to softreset make the port quiescent, otherwise |
| 1326 | * make sure the port's start/stop state matches what it was on |
| 1327 | * entry. |
| 1328 | * |
| 1329 | * Don't kill the port if the softreset is on a port multiplier |
| 1330 | * target, that would kill all the targets! |
| 1331 | */ |
| 1332 | if (error) { |
| 1333 | ahci_port_hardstop(ap); |
| 1334 | /* ap_probe set to failed */ |
| 1335 | } else { |
| 1336 | ap->ap_probe = ATA_PROBE_NEED_IDENT; |
| 1337 | ap->ap_pmcount = 1; |
| 1338 | ahci_port_start(ap); |
| 1339 | } |
| 1340 | ap->ap_flags &= ~AP_F_IN_RESET; |
| 1341 | crit_exit(); |
| 1342 | |
| 1343 | if (bootverbose) |
| 1344 | kprintf("%s: END SOFTRESET\n", PORTNAME(ap)); |
| 1345 | |
| 1346 | return (error); |
| 1347 | } |
| 1348 | |
| 1349 | /* |
| 1350 | * Issue just do the core COMRESET and basic device detection on a port. |
| 1351 | * |
| 1352 | * NOTE: Only called by ahci_port_hardreset(). |
| 1353 | */ |
| 1354 | static int |
| 1355 | ahci_comreset(struct ahci_port *ap, int *pmdetectp) |
| 1356 | { |
| 1357 | u_int32_t cmd; |
| 1358 | u_int32_t r; |
| 1359 | int error; |
| 1360 | int loop; |
| 1361 | |
| 1362 | /* |
| 1363 | * Idle the port, |
| 1364 | */ |
| 1365 | *pmdetectp = 0; |
| 1366 | ahci_port_stop(ap, 0); |
| 1367 | ap->ap_state = AP_S_NORMAL; |
| 1368 | ahci_os_sleep(10); |
| 1369 | |
| 1370 | /* |
| 1371 | * The port may have been quiescent with its SUD bit cleared, so |
| 1372 | * set the SUD (spin up device). |
| 1373 | * |
| 1374 | * NOTE: I do not know if SUD is a hardware pin/low-level signal |
| 1375 | * or if it is messaged. |
| 1376 | */ |
| 1377 | cmd = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; |
| 1378 | |
| 1379 | cmd |= AHCI_PREG_CMD_SUD | AHCI_PREG_CMD_POD; |
| 1380 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 1381 | ahci_os_sleep(10); |
| 1382 | |
| 1383 | /* |
| 1384 | * Make sure that all power management is disabled. |
| 1385 | * |
| 1386 | * NOTE! AHCI_PREG_SCTL_DET_DISABLE seems to be highly unreliable |
| 1387 | * on multiple chipsets and can brick the chipset or even |
| 1388 | * the whole PC. Never use it. |
| 1389 | */ |
| 1390 | ap->ap_type = ATA_PORT_T_NONE; |
| 1391 | |
| 1392 | r = AHCI_PREG_SCTL_IPM_DISABLED | |
| 1393 | AHCI_PREG_SCTL_SPM_DISABLED; |
| 1394 | ahci_pwrite(ap, AHCI_PREG_SCTL, r); |
| 1395 | ahci_os_sleep(10); |
| 1396 | |
| 1397 | /* |
| 1398 | * Start transmitting COMRESET. The spec says that COMRESET must |
| 1399 | * be sent for at least 1ms but in actual fact numerous devices |
| 1400 | * appear to take much longer. Delay a whole second here. |
| 1401 | * |
| 1402 | * In addition, SATA-3 ports can take longer to train, so even |
| 1403 | * SATA-2 devices which would normally detect very quickly may |
| 1404 | * take longer when plugged into a SATA-3 port. |
| 1405 | */ |
| 1406 | r |= AHCI_PREG_SCTL_DET_INIT; |
| 1407 | if (AhciForceGen1 & (1 << ap->ap_num)) |
| 1408 | r |= AHCI_PREG_SCTL_SPD_GEN1; |
| 1409 | else |
| 1410 | r |= AHCI_PREG_SCTL_SPD_ANY; |
| 1411 | ahci_pwrite(ap, AHCI_PREG_SCTL, r); |
| 1412 | ahci_os_sleep(1000); |
| 1413 | r &= ~AHCI_PREG_SCTL_SPD; |
| 1414 | |
| 1415 | ap->ap_flags &= ~AP_F_HARSH_REINIT; |
| 1416 | |
| 1417 | /* |
| 1418 | * Only SERR_DIAG_X needs to be cleared for TFD updates, but |
| 1419 | * since we are hard-resetting the port we might as well clear |
| 1420 | * the whole enchillada. |
| 1421 | * |
| 1422 | * Wait 1 whole second after clearing INIT before checking |
| 1423 | * the device detection bits in an attempt to work around chipsets |
| 1424 | * which do not properly mask PCS/PRCS during low level init. |
| 1425 | */ |
| 1426 | ahci_flush_tfd(ap); |
| 1427 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 1428 | ahci_os_sleep(10); |
| 1429 | |
| 1430 | r &= ~AHCI_PREG_SCTL_DET_INIT; |
| 1431 | r |= AHCI_PREG_SCTL_DET_NONE; |
| 1432 | ahci_pwrite(ap, AHCI_PREG_SCTL, r); |
| 1433 | ahci_os_sleep(1000); |
| 1434 | |
| 1435 | /* |
| 1436 | * Try to determine if there is a device on the port. |
| 1437 | * |
| 1438 | * Give the device 3/10 second to at least be detected. |
| 1439 | * If we fail clear PRCS (phy detect) since we may cycled |
| 1440 | * the phy and probably caused another PRCS interrupt. |
| 1441 | */ |
| 1442 | loop = 300; |
| 1443 | while (loop > 0) { |
| 1444 | r = ahci_pread(ap, AHCI_PREG_SSTS); |
| 1445 | if (r & AHCI_PREG_SSTS_DET) |
| 1446 | break; |
| 1447 | loop -= ahci_os_softsleep(); |
| 1448 | } |
| 1449 | if (loop == 0) { |
| 1450 | ahci_pwrite(ap, AHCI_PREG_IS, AHCI_PREG_IS_PRCS); |
| 1451 | if (bootverbose) { |
| 1452 | kprintf("%s: Port appears to be unplugged\n", |
| 1453 | PORTNAME(ap)); |
| 1454 | } |
| 1455 | error = ENODEV; |
| 1456 | goto done; |
| 1457 | } |
| 1458 | |
| 1459 | /* |
| 1460 | * There is something on the port. Regardless of what happens |
| 1461 | * after this tell the caller to try to detect a port multiplier. |
| 1462 | * |
| 1463 | * Give the device 3 seconds to fully negotiate. |
| 1464 | */ |
| 1465 | *pmdetectp = 1; |
| 1466 | |
| 1467 | if (ahci_pwait_eq(ap, 3000, AHCI_PREG_SSTS, |
| 1468 | AHCI_PREG_SSTS_DET, AHCI_PREG_SSTS_DET_DEV)) { |
| 1469 | if (bootverbose) { |
| 1470 | kprintf("%s: Device may be powered down\n", |
| 1471 | PORTNAME(ap)); |
| 1472 | } |
| 1473 | error = ENODEV; |
| 1474 | goto done; |
| 1475 | } |
| 1476 | |
| 1477 | /* |
| 1478 | * We got something that definitely looks like a device. Give |
| 1479 | * the device time to send us its first D2H FIS. Waiting for |
| 1480 | * BSY to clear accomplishes this. |
| 1481 | * |
| 1482 | * NOTE: A port multiplier may or may not clear BSY here, |
| 1483 | * depending on what is sitting in target 0 behind it. |
| 1484 | */ |
| 1485 | ahci_flush_tfd(ap); |
| 1486 | if (ahci_pwait_clr_to(ap, 3000, AHCI_PREG_TFD, |
| 1487 | AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { |
| 1488 | error = EBUSY; |
| 1489 | } else { |
| 1490 | error = 0; |
| 1491 | } |
| 1492 | |
| 1493 | done: |
| 1494 | ahci_flush_tfd(ap); |
| 1495 | return error; |
| 1496 | } |
| 1497 | |
| 1498 | |
| 1499 | /* |
| 1500 | * AHCI port reset, Section 10.4.2 |
| 1501 | * |
| 1502 | * This function does a hard reset of the port. Note that the device |
| 1503 | * connected to the port could still end-up hung. |
| 1504 | */ |
| 1505 | int |
| 1506 | ahci_port_hardreset(struct ahci_port *ap, int hard) |
| 1507 | { |
| 1508 | u_int32_t data; |
| 1509 | int error; |
| 1510 | int pmdetect; |
| 1511 | |
| 1512 | if (bootverbose) |
| 1513 | kprintf("%s: START HARDRESET\n", PORTNAME(ap)); |
| 1514 | ap->ap_flags |= AP_F_IN_RESET; |
| 1515 | |
| 1516 | error = ahci_comreset(ap, &pmdetect); |
| 1517 | |
| 1518 | /* |
| 1519 | * We may be asked to perform a port multiplier check even if the |
| 1520 | * comreset failed. This typically occurs when the PM has nothing |
| 1521 | * in slot 0, which can cause BSY to remain set. |
| 1522 | * |
| 1523 | * If the PM detection is successful it will override (error), |
| 1524 | * otherwise (error) is retained. If an error does occur it |
| 1525 | * is possible that a normal device has blown up on us DUE to |
| 1526 | * the PM detection code, so re-run the comreset and assume |
| 1527 | * a normal device. |
| 1528 | */ |
| 1529 | if (pmdetect) { |
| 1530 | if (ap->ap_sc->sc_cap & AHCI_REG_CAP_SPM) { |
| 1531 | error = ahci_pm_port_probe(ap, error); |
| 1532 | if (error) { |
| 1533 | error = ahci_comreset(ap, &pmdetect); |
| 1534 | } |
| 1535 | } |
| 1536 | } |
| 1537 | |
| 1538 | /* |
| 1539 | * Finish up. |
| 1540 | */ |
| 1541 | ahci_os_sleep(500); |
| 1542 | |
| 1543 | switch(error) { |
| 1544 | case 0: |
| 1545 | /* |
| 1546 | * All good, make sure the port is running and set the |
| 1547 | * probe state. Ignore the signature junk (it's unreliable) |
| 1548 | * until we get to the softreset code. |
| 1549 | */ |
| 1550 | if (ahci_port_start(ap)) { |
| 1551 | kprintf("%s: failed to start command DMA on port, " |
| 1552 | "disabling\n", PORTNAME(ap)); |
| 1553 | error = EBUSY; |
| 1554 | break; |
| 1555 | } |
| 1556 | if (ap->ap_type == ATA_PORT_T_PM) |
| 1557 | ap->ap_probe = ATA_PROBE_GOOD; |
| 1558 | else |
| 1559 | ap->ap_probe = ATA_PROBE_NEED_SOFT_RESET; |
| 1560 | break; |
| 1561 | case ENODEV: |
| 1562 | /* |
| 1563 | * Normal device probe failure |
| 1564 | */ |
| 1565 | data = ahci_pread(ap, AHCI_PREG_SSTS); |
| 1566 | |
| 1567 | switch(data & AHCI_PREG_SSTS_DET) { |
| 1568 | case AHCI_PREG_SSTS_DET_DEV_NE: |
| 1569 | kprintf("%s: Device not communicating\n", |
| 1570 | PORTNAME(ap)); |
| 1571 | break; |
| 1572 | case AHCI_PREG_SSTS_DET_PHYOFFLINE: |
| 1573 | kprintf("%s: PHY offline\n", |
| 1574 | PORTNAME(ap)); |
| 1575 | break; |
| 1576 | default: |
| 1577 | kprintf("%s: No device detected\n", |
| 1578 | PORTNAME(ap)); |
| 1579 | break; |
| 1580 | } |
| 1581 | ahci_port_hardstop(ap); |
| 1582 | break; |
| 1583 | default: |
| 1584 | /* |
| 1585 | * Abnormal probe (EBUSY) |
| 1586 | */ |
| 1587 | kprintf("%s: Device on port is bricked\n", |
| 1588 | PORTNAME(ap)); |
| 1589 | ahci_port_hardstop(ap); |
| 1590 | #if 0 |
| 1591 | rc = ahci_port_reset(ap, atx, 0); |
| 1592 | if (rc) { |
| 1593 | kprintf("%s: Unable unbrick device\n", |
| 1594 | PORTNAME(ap)); |
| 1595 | } else { |
| 1596 | kprintf("%s: Successfully unbricked\n", |
| 1597 | PORTNAME(ap)); |
| 1598 | } |
| 1599 | #endif |
| 1600 | break; |
| 1601 | } |
| 1602 | |
| 1603 | /* |
| 1604 | * Clean up |
| 1605 | */ |
| 1606 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 1607 | ahci_pwrite(ap, AHCI_PREG_IS, AHCI_PREG_IS_PCS | AHCI_PREG_IS_PRCS); |
| 1608 | |
| 1609 | ap->ap_flags &= ~AP_F_IN_RESET; |
| 1610 | |
| 1611 | if (bootverbose) |
| 1612 | kprintf("%s: END HARDRESET %d\n", PORTNAME(ap), error); |
| 1613 | return (error); |
| 1614 | } |
| 1615 | |
| 1616 | /* |
| 1617 | * Hard-stop on hot-swap device removal. See 10.10.1 |
| 1618 | * |
| 1619 | * Place the port in a mode that will allow it to detect hot-swap insertions. |
| 1620 | * This is a bit imprecise because just setting-up SCTL to DET_INIT doesn't |
| 1621 | * seem to do the job. |
| 1622 | * |
| 1623 | * FIS reception is left enabled but command processing is disabled. |
| 1624 | * Cycling FIS reception (FRE) can brick ports. |
| 1625 | */ |
| 1626 | void |
| 1627 | ahci_port_hardstop(struct ahci_port *ap) |
| 1628 | { |
| 1629 | struct ahci_ccb *ccb; |
| 1630 | struct ata_port *at; |
| 1631 | u_int32_t r; |
| 1632 | u_int32_t cmd; |
| 1633 | int slot; |
| 1634 | int i; |
| 1635 | |
| 1636 | /* |
| 1637 | * Stop the port. We can't modify things like SUD if the port |
| 1638 | * is running. |
| 1639 | */ |
| 1640 | ap->ap_state = AP_S_FATAL_ERROR; |
| 1641 | ap->ap_probe = ATA_PROBE_FAILED; |
| 1642 | ap->ap_type = ATA_PORT_T_NONE; |
| 1643 | ahci_port_stop(ap, 0); |
| 1644 | cmd = ahci_pread(ap, AHCI_PREG_CMD); |
| 1645 | cmd &= ~(AHCI_PREG_CMD_CLO | AHCI_PREG_CMD_PMA | AHCI_PREG_CMD_ICC); |
| 1646 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 1647 | |
| 1648 | /* |
| 1649 | * Clean up AT sub-ports on SATA port. |
| 1650 | */ |
| 1651 | for (i = 0; ap->ap_ata && i < AHCI_MAX_PMPORTS; ++i) { |
| 1652 | at = ap->ap_ata[i]; |
| 1653 | at->at_type = ATA_PORT_T_NONE; |
| 1654 | at->at_probe = ATA_PROBE_FAILED; |
| 1655 | } |
| 1656 | |
| 1657 | /* |
| 1658 | * Make sure FRE is active. There isn't anything we can do if it |
| 1659 | * fails so just ignore errors. |
| 1660 | */ |
| 1661 | if ((cmd & AHCI_PREG_CMD_FRE) == 0) { |
| 1662 | cmd |= AHCI_PREG_CMD_FRE; |
| 1663 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 1664 | if ((ap->ap_sc->sc_flags & AHCI_F_IGN_FR) == 0) |
| 1665 | ahci_pwait_set(ap, AHCI_PREG_CMD, AHCI_PREG_CMD_FR); |
| 1666 | } |
| 1667 | |
| 1668 | /* |
| 1669 | * 10.10.1 place us in the Listen state. |
| 1670 | * |
| 1671 | * 10.10.3 DET must be set to 0 and found to be 0 before |
| 1672 | * setting SUD to 0. |
| 1673 | * |
| 1674 | * Deactivating SUD only applies if the controller supports SUD, it |
| 1675 | * is a bit unclear what happens w/regards to detecting hotplug |
| 1676 | * if it doesn't. |
| 1677 | */ |
| 1678 | r = AHCI_PREG_SCTL_IPM_DISABLED | |
| 1679 | AHCI_PREG_SCTL_SPM_DISABLED; |
| 1680 | ahci_pwrite(ap, AHCI_PREG_SCTL, r); |
| 1681 | ahci_os_sleep(10); |
| 1682 | cmd &= ~AHCI_PREG_CMD_SUD; |
| 1683 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 1684 | ahci_os_sleep(10); |
| 1685 | |
| 1686 | /* |
| 1687 | * 10.10.1 |
| 1688 | * |
| 1689 | * Transition su to the spin-up state. HBA shall send COMRESET and |
| 1690 | * begin initialization sequence (whatever that means). Presumably |
| 1691 | * this is edge-triggered. Following the spin-up state the HBA |
| 1692 | * will automatically transition to the Normal state. |
| 1693 | * |
| 1694 | * This only applies if the controller supports SUD. |
| 1695 | * NEVER use AHCI_PREG_DET_DISABLE. |
| 1696 | */ |
| 1697 | cmd |= AHCI_PREG_CMD_POD | |
| 1698 | AHCI_PREG_CMD_SUD | |
| 1699 | AHCI_PREG_CMD_ICC_ACTIVE; |
| 1700 | ahci_pwrite(ap, AHCI_PREG_CMD, cmd); |
| 1701 | ahci_os_sleep(10); |
| 1702 | |
| 1703 | /* |
| 1704 | * Flush SERR_DIAG_X so the TFD can update. |
| 1705 | */ |
| 1706 | ahci_flush_tfd(ap); |
| 1707 | |
| 1708 | /* |
| 1709 | * Clean out pending ccbs |
| 1710 | */ |
| 1711 | while (ap->ap_active) { |
| 1712 | slot = ffs(ap->ap_active) - 1; |
| 1713 | ap->ap_active &= ~(1 << slot); |
| 1714 | ap->ap_expired &= ~(1 << slot); |
| 1715 | --ap->ap_active_cnt; |
| 1716 | ccb = &ap->ap_ccbs[slot]; |
| 1717 | if (ccb->ccb_xa.flags & ATA_F_TIMEOUT_RUNNING) { |
| 1718 | callout_stop(&ccb->ccb_timeout); |
| 1719 | ccb->ccb_xa.flags &= ~ATA_F_TIMEOUT_RUNNING; |
| 1720 | } |
| 1721 | ccb->ccb_xa.flags &= ~(ATA_F_TIMEOUT_DESIRED | |
| 1722 | ATA_F_TIMEOUT_EXPIRED); |
| 1723 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 1724 | ccb->ccb_done(ccb); |
| 1725 | ccb->ccb_xa.complete(&ccb->ccb_xa); |
| 1726 | } |
| 1727 | while (ap->ap_sactive) { |
| 1728 | slot = ffs(ap->ap_sactive) - 1; |
| 1729 | ap->ap_sactive &= ~(1 << slot); |
| 1730 | ap->ap_expired &= ~(1 << slot); |
| 1731 | ccb = &ap->ap_ccbs[slot]; |
| 1732 | if (ccb->ccb_xa.flags & ATA_F_TIMEOUT_RUNNING) { |
| 1733 | callout_stop(&ccb->ccb_timeout); |
| 1734 | ccb->ccb_xa.flags &= ~ATA_F_TIMEOUT_RUNNING; |
| 1735 | } |
| 1736 | ccb->ccb_xa.flags &= ~(ATA_F_TIMEOUT_DESIRED | |
| 1737 | ATA_F_TIMEOUT_EXPIRED); |
| 1738 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 1739 | ccb->ccb_done(ccb); |
| 1740 | ccb->ccb_xa.complete(&ccb->ccb_xa); |
| 1741 | } |
| 1742 | KKASSERT(ap->ap_active_cnt == 0); |
| 1743 | |
| 1744 | while ((ccb = TAILQ_FIRST(&ap->ap_ccb_pending)) != NULL) { |
| 1745 | TAILQ_REMOVE(&ap->ap_ccb_pending, ccb, ccb_entry); |
| 1746 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 1747 | ccb->ccb_xa.flags &= ~ATA_F_TIMEOUT_DESIRED; |
| 1748 | ccb->ccb_done(ccb); |
| 1749 | ccb->ccb_xa.complete(&ccb->ccb_xa); |
| 1750 | } |
| 1751 | |
| 1752 | /* |
| 1753 | * Hot-plug device detection should work at this point. e.g. on |
| 1754 | * AMD chipsets Spin-Up/Normal state is sufficient for hot-plug |
| 1755 | * detection and entering RESET (continuous COMRESET by setting INIT) |
| 1756 | * will actually prevent hot-plug detection from working properly. |
| 1757 | * |
| 1758 | * There may be cases where this will fail to work, I have some |
| 1759 | * additional code to place the HBA in RESET (send continuous |
| 1760 | * COMRESET) and hopefully get DIAG.X or other events when something |
| 1761 | * is plugged in. Unfortunately this isn't universal and can |
| 1762 | * also prevent events from generating interrupts. |
| 1763 | */ |
| 1764 | |
| 1765 | #if 0 |
| 1766 | /* |
| 1767 | * Transition us to the Reset state. Theoretically we send a |
| 1768 | * continuous stream of COMRESETs in this state. |
| 1769 | */ |
| 1770 | r |= AHCI_PREG_SCTL_DET_INIT; |
| 1771 | if (AhciForceGen1 & (1 << ap->ap_num)) { |
| 1772 | kprintf("%s: Force 1.5Gbits\n", PORTNAME(ap)); |
| 1773 | r |= AHCI_PREG_SCTL_SPD_GEN1; |
| 1774 | } else { |
| 1775 | r |= AHCI_PREG_SCTL_SPD_ANY; |
| 1776 | } |
| 1777 | ahci_pwrite(ap, AHCI_PREG_SCTL, r); |
| 1778 | ahci_os_sleep(10); |
| 1779 | |
| 1780 | /* |
| 1781 | * Flush SERR_DIAG_X so the TFD can update. |
| 1782 | */ |
| 1783 | ahci_flush_tfd(ap); |
| 1784 | #endif |
| 1785 | /* NOP */ |
| 1786 | } |
| 1787 | |
| 1788 | /* |
| 1789 | * We can't loop on the X bit, a continuous COMINIT received will make |
| 1790 | * it loop forever. Just assume one event has built up and clear X |
| 1791 | * so the task file descriptor can update. |
| 1792 | */ |
| 1793 | void |
| 1794 | ahci_flush_tfd(struct ahci_port *ap) |
| 1795 | { |
| 1796 | u_int32_t r; |
| 1797 | |
| 1798 | r = ahci_pread(ap, AHCI_PREG_SERR); |
| 1799 | if (r & AHCI_PREG_SERR_DIAG_X) |
| 1800 | ahci_pwrite(ap, AHCI_PREG_SERR, AHCI_PREG_SERR_DIAG_X); |
| 1801 | } |
| 1802 | |
| 1803 | /* |
| 1804 | * Figure out what type of device is connected to the port, ATAPI or |
| 1805 | * DISK. |
| 1806 | */ |
| 1807 | int |
| 1808 | ahci_port_signature_detect(struct ahci_port *ap, struct ata_port *at) |
| 1809 | { |
| 1810 | u_int32_t sig; |
| 1811 | |
| 1812 | sig = ahci_pread(ap, AHCI_PREG_SIG); |
| 1813 | if (bootverbose) |
| 1814 | kprintf("%s: sig %08x\n", ATANAME(ap, at), sig); |
| 1815 | if ((sig & 0xffff0000) == (SATA_SIGNATURE_ATAPI & 0xffff0000)) { |
| 1816 | return(ATA_PORT_T_ATAPI); |
| 1817 | } else if ((sig & 0xffff0000) == |
| 1818 | (SATA_SIGNATURE_PORT_MULTIPLIER & 0xffff0000)) { |
| 1819 | return(ATA_PORT_T_PM); |
| 1820 | } else { |
| 1821 | return(ATA_PORT_T_DISK); |
| 1822 | } |
| 1823 | } |
| 1824 | |
| 1825 | /* |
| 1826 | * Load the DMA descriptor table for a CCB's buffer. |
| 1827 | */ |
| 1828 | int |
| 1829 | ahci_load_prdt(struct ahci_ccb *ccb) |
| 1830 | { |
| 1831 | struct ahci_port *ap = ccb->ccb_port; |
| 1832 | struct ahci_softc *sc = ap->ap_sc; |
| 1833 | struct ata_xfer *xa = &ccb->ccb_xa; |
| 1834 | struct ahci_prdt *prdt = ccb->ccb_cmd_table->prdt; |
| 1835 | bus_dmamap_t dmap = ccb->ccb_dmamap; |
| 1836 | struct ahci_cmd_hdr *cmd_slot = ccb->ccb_cmd_hdr; |
| 1837 | int error; |
| 1838 | |
| 1839 | if (xa->datalen == 0) { |
| 1840 | ccb->ccb_cmd_hdr->prdtl = 0; |
| 1841 | return (0); |
| 1842 | } |
| 1843 | |
| 1844 | error = bus_dmamap_load(sc->sc_tag_data, dmap, |
| 1845 | xa->data, xa->datalen, |
| 1846 | ahci_load_prdt_callback, |
| 1847 | &prdt, |
| 1848 | ((xa->flags & ATA_F_NOWAIT) ? |
| 1849 | BUS_DMA_NOWAIT : BUS_DMA_WAITOK)); |
| 1850 | if (error != 0) { |
| 1851 | kprintf("%s: error %d loading dmamap\n", PORTNAME(ap), error); |
| 1852 | return (1); |
| 1853 | } |
| 1854 | #if 0 |
| 1855 | if (xa->flags & ATA_F_PIO) |
| 1856 | prdt->flags |= htole32(AHCI_PRDT_FLAG_INTR); |
| 1857 | #endif |
| 1858 | |
| 1859 | cmd_slot->prdtl = htole16(prdt - ccb->ccb_cmd_table->prdt + 1); |
| 1860 | |
| 1861 | if (xa->flags & ATA_F_READ) |
| 1862 | bus_dmamap_sync(sc->sc_tag_data, dmap, BUS_DMASYNC_PREREAD); |
| 1863 | if (xa->flags & ATA_F_WRITE) |
| 1864 | bus_dmamap_sync(sc->sc_tag_data, dmap, BUS_DMASYNC_PREWRITE); |
| 1865 | |
| 1866 | return (0); |
| 1867 | } |
| 1868 | |
| 1869 | /* |
| 1870 | * Callback from BUSDMA system to load the segment list. The passed segment |
| 1871 | * list is a temporary structure. |
| 1872 | */ |
| 1873 | static |
| 1874 | void |
| 1875 | ahci_load_prdt_callback(void *info, bus_dma_segment_t *segs, int nsegs, |
| 1876 | int error) |
| 1877 | { |
| 1878 | struct ahci_prdt *prd = *(void **)info; |
| 1879 | u_int64_t addr; |
| 1880 | |
| 1881 | KKASSERT(nsegs <= AHCI_MAX_PRDT); |
| 1882 | |
| 1883 | while (nsegs) { |
| 1884 | addr = segs->ds_addr; |
| 1885 | prd->dba_hi = htole32((u_int32_t)(addr >> 32)); |
| 1886 | prd->dba_lo = htole32((u_int32_t)addr); |
| 1887 | prd->flags = htole32(segs->ds_len - 1); |
| 1888 | --nsegs; |
| 1889 | if (nsegs) |
| 1890 | ++prd; |
| 1891 | ++segs; |
| 1892 | } |
| 1893 | *(void **)info = prd; /* return last valid segment */ |
| 1894 | } |
| 1895 | |
| 1896 | void |
| 1897 | ahci_unload_prdt(struct ahci_ccb *ccb) |
| 1898 | { |
| 1899 | struct ahci_port *ap = ccb->ccb_port; |
| 1900 | struct ahci_softc *sc = ap->ap_sc; |
| 1901 | struct ata_xfer *xa = &ccb->ccb_xa; |
| 1902 | bus_dmamap_t dmap = ccb->ccb_dmamap; |
| 1903 | |
| 1904 | if (xa->datalen != 0) { |
| 1905 | if (xa->flags & ATA_F_READ) { |
| 1906 | bus_dmamap_sync(sc->sc_tag_data, dmap, |
| 1907 | BUS_DMASYNC_POSTREAD); |
| 1908 | } |
| 1909 | if (xa->flags & ATA_F_WRITE) { |
| 1910 | bus_dmamap_sync(sc->sc_tag_data, dmap, |
| 1911 | BUS_DMASYNC_POSTWRITE); |
| 1912 | } |
| 1913 | bus_dmamap_unload(sc->sc_tag_data, dmap); |
| 1914 | |
| 1915 | /* |
| 1916 | * prdbc is only updated by hardware for non-NCQ commands. |
| 1917 | */ |
| 1918 | if (ccb->ccb_xa.flags & ATA_F_NCQ) { |
| 1919 | xa->resid = 0; |
| 1920 | } else { |
| 1921 | if (ccb->ccb_cmd_hdr->prdbc == 0 && |
| 1922 | ccb->ccb_xa.state == ATA_S_COMPLETE) { |
| 1923 | kprintf("%s: WARNING! Unload prdbc resid " |
| 1924 | "was zero! tag=%d\n", |
| 1925 | ATANAME(ap, xa->at), ccb->ccb_slot); |
| 1926 | } |
| 1927 | xa->resid = xa->datalen - |
| 1928 | le32toh(ccb->ccb_cmd_hdr->prdbc); |
| 1929 | } |
| 1930 | } |
| 1931 | } |
| 1932 | |
| 1933 | /* |
| 1934 | * Start a command and poll for completion. |
| 1935 | * |
| 1936 | * timeout is in ms and only counts once the command gets on-chip. |
| 1937 | * |
| 1938 | * Returns ATA_S_* state, compare against ATA_S_COMPLETE to determine |
| 1939 | * that no error occured. |
| 1940 | * |
| 1941 | * NOTE: If the caller specifies a NULL timeout function the caller is |
| 1942 | * responsible for clearing hardware state on failure, but we will |
| 1943 | * deal with removing the ccb from any pending queue. |
| 1944 | * |
| 1945 | * NOTE: NCQ should never be used with this function. |
| 1946 | * |
| 1947 | * NOTE: If the port is in a failed state and stopped we do not try |
| 1948 | * to activate the ccb. |
| 1949 | */ |
| 1950 | int |
| 1951 | ahci_poll(struct ahci_ccb *ccb, int timeout, |
| 1952 | void (*timeout_fn)(struct ahci_ccb *)) |
| 1953 | { |
| 1954 | struct ahci_port *ap = ccb->ccb_port; |
| 1955 | |
| 1956 | if (ccb->ccb_port->ap_state == AP_S_FATAL_ERROR) { |
| 1957 | ccb->ccb_xa.state = ATA_S_ERROR; |
| 1958 | return(ccb->ccb_xa.state); |
| 1959 | } |
| 1960 | crit_enter(); |
| 1961 | #if 0 |
| 1962 | kprintf("%s: Start command %02x tag=%d\n", |
| 1963 | ATANAME(ccb->ccb_port, ccb->ccb_xa.at), |
| 1964 | ccb->ccb_xa.fis->command, ccb->ccb_slot); |
| 1965 | #endif |
| 1966 | ahci_start(ccb); |
| 1967 | |
| 1968 | do { |
| 1969 | ahci_port_intr(ap, 1); |
| 1970 | switch(ccb->ccb_xa.state) { |
| 1971 | case ATA_S_ONCHIP: |
| 1972 | timeout -= ahci_os_softsleep(); |
| 1973 | break; |
| 1974 | case ATA_S_PENDING: |
| 1975 | ahci_os_softsleep(); |
| 1976 | ahci_check_active_timeouts(ap); |
| 1977 | break; |
| 1978 | default: |
| 1979 | crit_exit(); |
| 1980 | return (ccb->ccb_xa.state); |
| 1981 | } |
| 1982 | } while (timeout > 0); |
| 1983 | |
| 1984 | if ((ccb->ccb_xa.flags & ATA_F_SILENT) == 0) { |
| 1985 | kprintf("%s: Poll timeout slot %d CMD: %b TFD: 0x%b SERR: %b\n", |
| 1986 | ATANAME(ap, ccb->ccb_xa.at), ccb->ccb_slot, |
| 1987 | ahci_pread(ap, AHCI_PREG_CMD), AHCI_PFMT_CMD, |
| 1988 | ahci_pread(ap, AHCI_PREG_TFD), AHCI_PFMT_TFD_STS, |
| 1989 | ahci_pread(ap, AHCI_PREG_SERR), AHCI_PFMT_SERR); |
| 1990 | } |
| 1991 | |
| 1992 | timeout_fn(ccb); |
| 1993 | |
| 1994 | crit_exit(); |
| 1995 | |
| 1996 | return(ccb->ccb_xa.state); |
| 1997 | } |
| 1998 | |
| 1999 | /* |
| 2000 | * When polling we have to check if the currently active CCB(s) |
| 2001 | * have timed out as the callout will be deadlocked while we |
| 2002 | * hold the port lock. |
| 2003 | */ |
| 2004 | void |
| 2005 | ahci_check_active_timeouts(struct ahci_port *ap) |
| 2006 | { |
| 2007 | struct ahci_ccb *ccb; |
| 2008 | u_int32_t mask; |
| 2009 | int tag; |
| 2010 | |
| 2011 | mask = ap->ap_active | ap->ap_sactive; |
| 2012 | while (mask) { |
| 2013 | tag = ffs(mask) - 1; |
| 2014 | mask &= ~(1 << tag); |
| 2015 | ccb = &ap->ap_ccbs[tag]; |
| 2016 | if (ccb->ccb_xa.flags & ATA_F_TIMEOUT_EXPIRED) { |
| 2017 | ahci_ata_cmd_timeout(ccb); |
| 2018 | } |
| 2019 | } |
| 2020 | } |
| 2021 | |
| 2022 | static |
| 2023 | __inline |
| 2024 | void |
| 2025 | ahci_start_timeout(struct ahci_ccb *ccb) |
| 2026 | { |
| 2027 | if (ccb->ccb_xa.flags & ATA_F_TIMEOUT_DESIRED) { |
| 2028 | ccb->ccb_xa.flags |= ATA_F_TIMEOUT_RUNNING; |
| 2029 | callout_reset(&ccb->ccb_timeout, |
| 2030 | (ccb->ccb_xa.timeout * hz + 999) / 1000, |
| 2031 | ahci_ata_cmd_timeout_unserialized, ccb); |
| 2032 | } |
| 2033 | } |
| 2034 | |
| 2035 | void |
| 2036 | ahci_start(struct ahci_ccb *ccb) |
| 2037 | { |
| 2038 | struct ahci_port *ap = ccb->ccb_port; |
| 2039 | struct ahci_softc *sc = ap->ap_sc; |
| 2040 | |
| 2041 | KKASSERT(ccb->ccb_xa.state == ATA_S_PENDING); |
| 2042 | |
| 2043 | /* Zero transferred byte count before transfer */ |
| 2044 | ccb->ccb_cmd_hdr->prdbc = 0; |
| 2045 | |
| 2046 | /* Sync command list entry and corresponding command table entry */ |
| 2047 | bus_dmamap_sync(sc->sc_tag_cmdh, |
| 2048 | AHCI_DMA_MAP(ap->ap_dmamem_cmd_list), |
| 2049 | BUS_DMASYNC_PREWRITE); |
| 2050 | bus_dmamap_sync(sc->sc_tag_cmdt, |
| 2051 | AHCI_DMA_MAP(ap->ap_dmamem_cmd_table), |
| 2052 | BUS_DMASYNC_PREWRITE); |
| 2053 | |
| 2054 | /* Prepare RFIS area for write by controller */ |
| 2055 | bus_dmamap_sync(sc->sc_tag_rfis, |
| 2056 | AHCI_DMA_MAP(ap->ap_dmamem_rfis), |
| 2057 | BUS_DMASYNC_PREREAD); |
| 2058 | |
| 2059 | /* |
| 2060 | * There's no point trying to optimize this, it only shaves a few |
| 2061 | * nanoseconds so just queue the command and call our generic issue. |
| 2062 | */ |
| 2063 | ahci_issue_pending_commands(ap, ccb); |
| 2064 | } |
| 2065 | |
| 2066 | /* |
| 2067 | * While holding the port lock acquire exclusive access to the port. |
| 2068 | * |
| 2069 | * This is used when running the state machine to initialize and identify |
| 2070 | * targets over a port multiplier. Setting exclusive access prevents |
| 2071 | * ahci_port_intr() from activating any requests sitting on the pending |
| 2072 | * queue. |
| 2073 | */ |
| 2074 | void |
| 2075 | ahci_beg_exclusive_access(struct ahci_port *ap, struct ata_port *at) |
| 2076 | { |
| 2077 | KKASSERT((ap->ap_flags & AP_F_EXCLUSIVE_ACCESS) == 0); |
| 2078 | ap->ap_flags |= AP_F_EXCLUSIVE_ACCESS; |
| 2079 | while (ap->ap_active || ap->ap_sactive) { |
| 2080 | ahci_port_intr(ap, 1); |
| 2081 | ahci_os_softsleep(); |
| 2082 | } |
| 2083 | } |
| 2084 | |
| 2085 | void |
| 2086 | ahci_end_exclusive_access(struct ahci_port *ap, struct ata_port *at) |
| 2087 | { |
| 2088 | KKASSERT((ap->ap_flags & AP_F_EXCLUSIVE_ACCESS) != 0); |
| 2089 | ap->ap_flags &= ~AP_F_EXCLUSIVE_ACCESS; |
| 2090 | ahci_issue_pending_commands(ap, NULL); |
| 2091 | } |
| 2092 | |
| 2093 | #if 0 |
| 2094 | |
| 2095 | static void |
| 2096 | fubar(struct ahci_ccb *ccb) |
| 2097 | { |
| 2098 | struct ahci_port *ap = ccb->ccb_port; |
| 2099 | struct ahci_cmd_hdr *cmd; |
| 2100 | struct ahci_cmd_table *tab; |
| 2101 | struct ahci_prdt *prdt; |
| 2102 | int i; |
| 2103 | |
| 2104 | kprintf("%s: ISSUE %02x\n", |
| 2105 | ATANAME(ap, ccb->ccb_xa.at), |
| 2106 | ccb->ccb_xa.fis->command); |
| 2107 | cmd = ccb->ccb_cmd_hdr; |
| 2108 | tab = ccb->ccb_cmd_table; |
| 2109 | prdt = ccb->ccb_cmd_table->prdt; |
| 2110 | kprintf("cmd flags=%04x prdtl=%d prdbc=%d ctba=%08x%08x\n", |
| 2111 | cmd->flags, cmd->prdtl, cmd->prdbc, |
| 2112 | cmd->ctba_hi, cmd->ctba_lo); |
| 2113 | for (i = 0; i < cmd->prdtl; ++i) { |
| 2114 | kprintf("\t%d dba=%08x%08x res=%08x flags=%08x\n", |
| 2115 | i, prdt->dba_hi, prdt->dba_lo, prdt->reserved, |
| 2116 | prdt->flags); |
| 2117 | } |
| 2118 | kprintf("tab\n"); |
| 2119 | } |
| 2120 | |
| 2121 | #endif |
| 2122 | |
| 2123 | /* |
| 2124 | * If ccb is not NULL enqueue and/or issue it. |
| 2125 | * |
| 2126 | * If ccb is NULL issue whatever we can from the queue. However, nothing |
| 2127 | * new is issued if the exclusive access flag is set or expired ccb's are |
| 2128 | * present. |
| 2129 | * |
| 2130 | * If existing commands are still active (ap_active/ap_sactive) we can only |
| 2131 | * issue matching new commands. |
| 2132 | */ |
| 2133 | void |
| 2134 | ahci_issue_pending_commands(struct ahci_port *ap, struct ahci_ccb *ccb) |
| 2135 | { |
| 2136 | u_int32_t mask; |
| 2137 | int limit; |
| 2138 | |
| 2139 | /* |
| 2140 | * Enqueue the ccb. |
| 2141 | * |
| 2142 | * If just running the queue and in exclusive access mode we |
| 2143 | * just return. Also in this case if there are any expired ccb's |
| 2144 | * we want to clear the queue so the port can be safely stopped. |
| 2145 | */ |
| 2146 | if (ccb) { |
| 2147 | TAILQ_INSERT_TAIL(&ap->ap_ccb_pending, ccb, ccb_entry); |
| 2148 | } else if ((ap->ap_flags & AP_F_EXCLUSIVE_ACCESS) || ap->ap_expired) { |
| 2149 | return; |
| 2150 | } |
| 2151 | |
| 2152 | /* |
| 2153 | * Pull the next ccb off the queue and run it if possible. |
| 2154 | */ |
| 2155 | if ((ccb = TAILQ_FIRST(&ap->ap_ccb_pending)) == NULL) |
| 2156 | return; |
| 2157 | |
| 2158 | /* |
| 2159 | * Handle exclusivity requirements. |
| 2160 | * |
| 2161 | * ATA_F_EXCLUSIVE is used when we want to be the only command |
| 2162 | * running. |
| 2163 | * |
| 2164 | * ATA_F_AUTOSENSE is used when we want the D2H rfis loaded |
| 2165 | * back into the ccb on a normal (non-errored) command completion. |
| 2166 | * For example, for PM requests to target 15. Because the AHCI |
| 2167 | * spec does not stop the command processor and has only one rfis |
| 2168 | * area (for non-FBSS anyway), AUTOSENSE currently implies EXCLUSIVE. |
| 2169 | * Otherwise multiple completions can destroy the rfis data before |
| 2170 | * we have a chance to copy it. |
| 2171 | */ |
| 2172 | if (ap->ap_active & ~ap->ap_expired) { |
| 2173 | /* |
| 2174 | * There may be multiple ccb's already running, |
| 2175 | * if any are running and ap_run_flags sets |
| 2176 | * one of these flags then we know only one is |
| 2177 | * running. |
| 2178 | * |
| 2179 | * XXX Current AUTOSENSE code forces exclusivity |
| 2180 | * to simplify the code. |
| 2181 | */ |
| 2182 | if (ap->ap_run_flags & |
| 2183 | (ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE)) { |
| 2184 | return; |
| 2185 | } |
| 2186 | |
| 2187 | if (ccb->ccb_xa.flags & |
| 2188 | (ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE)) { |
| 2189 | return; |
| 2190 | } |
| 2191 | } |
| 2192 | |
| 2193 | if (ccb->ccb_xa.flags & ATA_F_NCQ) { |
| 2194 | /* |
| 2195 | * The next command is a NCQ command and can be issued as |
| 2196 | * long as currently active commands are not standard. |
| 2197 | */ |
| 2198 | if (ap->ap_active) { |
| 2199 | KKASSERT(ap->ap_active_cnt > 0); |
| 2200 | return; |
| 2201 | } |
| 2202 | KKASSERT(ap->ap_active_cnt == 0); |
| 2203 | |
| 2204 | mask = 0; |
| 2205 | do { |
| 2206 | TAILQ_REMOVE(&ap->ap_ccb_pending, ccb, ccb_entry); |
| 2207 | mask |= 1 << ccb->ccb_slot; |
| 2208 | ccb->ccb_xa.state = ATA_S_ONCHIP; |
| 2209 | ahci_start_timeout(ccb); |
| 2210 | ap->ap_run_flags = ccb->ccb_xa.flags; |
| 2211 | ccb = TAILQ_FIRST(&ap->ap_ccb_pending); |
| 2212 | } while (ccb && (ccb->ccb_xa.flags & ATA_F_NCQ) && |
| 2213 | (ap->ap_run_flags & |
| 2214 | (ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE)) == 0); |
| 2215 | |
| 2216 | ap->ap_sactive |= mask; |
| 2217 | ahci_pwrite(ap, AHCI_PREG_SACT, mask); |
| 2218 | ahci_pwrite(ap, AHCI_PREG_CI, mask); |
| 2219 | } else { |
| 2220 | /* |
| 2221 | * The next command is a standard command and can be issued |
| 2222 | * as long as currently active commands are not NCQ. |
| 2223 | * |
| 2224 | * We limit ourself to 1 command if we have a port multiplier, |
| 2225 | * (at least without FBSS support), otherwise timeouts on |
| 2226 | * one port can race completions on other ports (see |
| 2227 | * ahci_ata_cmd_timeout() for more information). |
| 2228 | * |
| 2229 | * If not on a port multiplier generally allow up to 4 |
| 2230 | * standard commands to be enqueued. Remember that the |
| 2231 | * command processor will still process them sequentially. |
| 2232 | */ |
| 2233 | if (ap->ap_sactive) |
| 2234 | return; |
| 2235 | if (ap->ap_type == ATA_PORT_T_PM) |
| 2236 | limit = 1; |
| 2237 | else if (ap->ap_sc->sc_ncmds > 4) |
| 2238 | limit = 4; |
| 2239 | else |
| 2240 | limit = 2; |
| 2241 | |
| 2242 | while (ap->ap_active_cnt < limit && ccb && |
| 2243 | (ccb->ccb_xa.flags & ATA_F_NCQ) == 0) { |
| 2244 | TAILQ_REMOVE(&ap->ap_ccb_pending, ccb, ccb_entry); |
| 2245 | #if 0 |
| 2246 | fubar(ccb); |
| 2247 | #endif |
| 2248 | ap->ap_active |= 1 << ccb->ccb_slot; |
| 2249 | ap->ap_active_cnt++; |
| 2250 | ap->ap_run_flags = ccb->ccb_xa.flags; |
| 2251 | ccb->ccb_xa.state = ATA_S_ONCHIP; |
| 2252 | ahci_pwrite(ap, AHCI_PREG_CI, 1 << ccb->ccb_slot); |
| 2253 | ahci_start_timeout(ccb); |
| 2254 | if ((ap->ap_run_flags & |
| 2255 | (ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE)) == 0) { |
| 2256 | break; |
| 2257 | } |
| 2258 | ccb = TAILQ_FIRST(&ap->ap_ccb_pending); |
| 2259 | if (ccb && (ccb->ccb_xa.flags & |
| 2260 | (ATA_F_EXCLUSIVE | ATA_F_AUTOSENSE))) { |
| 2261 | break; |
| 2262 | } |
| 2263 | } |
| 2264 | } |
| 2265 | } |
| 2266 | |
| 2267 | void |
| 2268 | ahci_intr(void *arg) |
| 2269 | { |
| 2270 | struct ahci_softc *sc = arg; |
| 2271 | struct ahci_port *ap; |
| 2272 | u_int32_t is; |
| 2273 | u_int32_t ack; |
| 2274 | int port; |
| 2275 | |
| 2276 | /* |
| 2277 | * Check if the master enable is up, and whether any interrupts are |
| 2278 | * pending. |
| 2279 | */ |
| 2280 | if ((sc->sc_flags & AHCI_F_INT_GOOD) == 0) |
| 2281 | return; |
| 2282 | is = ahci_read(sc, AHCI_REG_IS); |
| 2283 | if (is == 0 || is == 0xffffffff) { |
| 2284 | return; |
| 2285 | } |
| 2286 | is &= sc->sc_portmask; |
| 2287 | |
| 2288 | #ifdef AHCI_COALESCE |
| 2289 | /* Check coalescing interrupt first */ |
| 2290 | if (is & sc->sc_ccc_mask) { |
| 2291 | DPRINTF(AHCI_D_INTR, "%s: command coalescing interrupt\n", |
| 2292 | DEVNAME(sc)); |
| 2293 | is &= ~sc->sc_ccc_mask; |
| 2294 | is |= sc->sc_ccc_ports_cur; |
| 2295 | } |
| 2296 | #endif |
| 2297 | |
| 2298 | /* |
| 2299 | * Process interrupts for each port in a non-blocking fashion. |
| 2300 | * |
| 2301 | * The global IS bit is forced on if any unmasked port interrupts |
| 2302 | * are pending, even if we clear. |
| 2303 | */ |
| 2304 | for (ack = 0; is; is &= ~(1 << port)) { |
| 2305 | port = ffs(is) - 1; |
| 2306 | ack |= 1 << port; |
| 2307 | |
| 2308 | ap = sc->sc_ports[port]; |
| 2309 | if (ap == NULL) |
| 2310 | continue; |
| 2311 | |
| 2312 | if (ahci_os_lock_port_nb(ap) == 0) { |
| 2313 | ahci_port_intr(ap, 0); |
| 2314 | ahci_os_unlock_port(ap); |
| 2315 | } else { |
| 2316 | ahci_pwrite(ap, AHCI_PREG_IE, 0); |
| 2317 | ahci_os_signal_port_thread(ap, AP_SIGF_PORTINT); |
| 2318 | } |
| 2319 | } |
| 2320 | ahci_write(sc, AHCI_REG_IS, ack); |
| 2321 | } |
| 2322 | |
| 2323 | /* |
| 2324 | * Core called from helper thread. |
| 2325 | */ |
| 2326 | void |
| 2327 | ahci_port_thread_core(struct ahci_port *ap, int mask) |
| 2328 | { |
| 2329 | /* |
| 2330 | * Process any expired timedouts. |
| 2331 | */ |
| 2332 | ahci_os_lock_port(ap); |
| 2333 | if (mask & AP_SIGF_TIMEOUT) { |
| 2334 | ahci_check_active_timeouts(ap); |
| 2335 | } |
| 2336 | |
| 2337 | /* |
| 2338 | * Process port interrupts which require a higher level of |
| 2339 | * intervention. |
| 2340 | */ |
| 2341 | if (mask & AP_SIGF_PORTINT) { |
| 2342 | ahci_port_intr(ap, 1); |
| 2343 | ahci_port_interrupt_enable(ap); |
| 2344 | ahci_os_unlock_port(ap); |
| 2345 | } else if (ap->ap_probe != ATA_PROBE_FAILED) { |
| 2346 | ahci_port_intr(ap, 1); |
| 2347 | ahci_port_interrupt_enable(ap); |
| 2348 | ahci_os_unlock_port(ap); |
| 2349 | } else { |
| 2350 | ahci_os_unlock_port(ap); |
| 2351 | } |
| 2352 | } |
| 2353 | |
| 2354 | /* |
| 2355 | * Core per-port interrupt handler. |
| 2356 | * |
| 2357 | * If blockable is 0 we cannot call ahci_os_sleep() at all and we can only |
| 2358 | * deal with normal command completions which do not require blocking. |
| 2359 | */ |
| 2360 | void |
| 2361 | ahci_port_intr(struct ahci_port *ap, int blockable) |
| 2362 | { |
| 2363 | struct ahci_softc *sc = ap->ap_sc; |
| 2364 | u_int32_t is, ci_saved, ci_masked; |
| 2365 | int slot; |
| 2366 | int stopped = 0; |
| 2367 | struct ahci_ccb *ccb = NULL; |
| 2368 | struct ata_port *ccb_at = NULL; |
| 2369 | volatile u_int32_t *active; |
| 2370 | const u_int32_t blockable_mask = AHCI_PREG_IS_TFES | |
| 2371 | AHCI_PREG_IS_IFS | |
| 2372 | AHCI_PREG_IS_PCS | |
| 2373 | AHCI_PREG_IS_PRCS | |
| 2374 | AHCI_PREG_IS_HBFS | |
| 2375 | AHCI_PREG_IS_OFS | |
| 2376 | AHCI_PREG_IS_UFS; |
| 2377 | |
| 2378 | enum { NEED_NOTHING, NEED_REINIT, NEED_RESTART, |
| 2379 | NEED_HOTPLUG_INSERT, NEED_HOTPLUG_REMOVE } need = NEED_NOTHING; |
| 2380 | |
| 2381 | /* |
| 2382 | * All basic command completions are always processed. |
| 2383 | */ |
| 2384 | is = ahci_pread(ap, AHCI_PREG_IS); |
| 2385 | if (is & AHCI_PREG_IS_DPS) |
| 2386 | ahci_pwrite(ap, AHCI_PREG_IS, is & AHCI_PREG_IS_DPS); |
| 2387 | |
| 2388 | /* |
| 2389 | * If we can't block then we can't handle these here. Disable |
| 2390 | * the interrupts in question so we don't live-lock, the helper |
| 2391 | * thread will re-enable them. |
| 2392 | * |
| 2393 | * If the port is in a completely failed state we do not want |
| 2394 | * to drop through to failed-command-processing if blockable is 0, |
| 2395 | * just let the thread deal with it all. |
| 2396 | * |
| 2397 | * Otherwise we fall through and still handle DHRS and any commands |
| 2398 | * which completed normally. Even if we are errored we haven't |
| 2399 | * stopped the port yet so CI/SACT are still good. |
| 2400 | */ |
| 2401 | if (blockable == 0) { |
| 2402 | if (ap->ap_state == AP_S_FATAL_ERROR) { |
| 2403 | ahci_pwrite(ap, AHCI_PREG_IE, 0); |
| 2404 | ahci_os_signal_port_thread(ap, AP_SIGF_PORTINT); |
| 2405 | return; |
| 2406 | } |
| 2407 | if (is & blockable_mask) { |
| 2408 | ahci_pwrite(ap, AHCI_PREG_IE, 0); |
| 2409 | ahci_os_signal_port_thread(ap, AP_SIGF_PORTINT); |
| 2410 | return; |
| 2411 | } |
| 2412 | } |
| 2413 | |
| 2414 | /* |
| 2415 | * Either NCQ or non-NCQ commands will be active, never both. |
| 2416 | */ |
| 2417 | if (ap->ap_sactive) { |
| 2418 | KKASSERT(ap->ap_active == 0); |
| 2419 | KKASSERT(ap->ap_active_cnt == 0); |
| 2420 | ci_saved = ahci_pread(ap, AHCI_PREG_SACT); |
| 2421 | active = &ap->ap_sactive; |
| 2422 | } else { |
| 2423 | ci_saved = ahci_pread(ap, AHCI_PREG_CI); |
| 2424 | active = &ap->ap_active; |
| 2425 | } |
| 2426 | KKASSERT(!(ap->ap_sactive && ap->ap_active)); |
| 2427 | #if 0 |
| 2428 | kprintf("CHECK act=%08x/%08x sact=%08x/%08x\n", |
| 2429 | ap->ap_active, ahci_pread(ap, AHCI_PREG_CI), |
| 2430 | ap->ap_sactive, ahci_pread(ap, AHCI_PREG_SACT)); |
| 2431 | #endif |
| 2432 | |
| 2433 | /* |
| 2434 | * Ignore AHCI_PREG_IS_PRCS when link power management is on |
| 2435 | */ |
| 2436 | if (ap->link_pwr_mgmt != AHCI_LINK_PWR_MGMT_NONE) { |
| 2437 | is &= ~AHCI_PREG_IS_PRCS; |
| 2438 | ahci_pwrite(ap, AHCI_PREG_SERR, |
| 2439 | AHCI_PREG_SERR_DIAG_N | AHCI_PREG_SERR_DIAG_W); |
| 2440 | } |
| 2441 | |
| 2442 | /* |
| 2443 | * Command failed (blockable). |
| 2444 | * |
| 2445 | * See AHCI 1.1 spec 6.2.2.1 and 6.2.2.2. |
| 2446 | * |
| 2447 | * This stops command processing. |
| 2448 | */ |
| 2449 | if (is & AHCI_PREG_IS_TFES) { |
| 2450 | u_int32_t tfd, serr; |
| 2451 | int err_slot; |
| 2452 | |
| 2453 | process_error: |
| 2454 | tfd = ahci_pread(ap, AHCI_PREG_TFD); |
| 2455 | serr = ahci_pread(ap, AHCI_PREG_SERR); |
| 2456 | |
| 2457 | /* |
| 2458 | * Load the error slot and restart command processing. |
| 2459 | * CLO if we need to. The error slot may not be valid. |
| 2460 | * MUST BE DONE BEFORE CLEARING ST! |
| 2461 | * |
| 2462 | * Cycle ST. |
| 2463 | * |
| 2464 | * It is unclear but we may have to clear SERR to reenable |
| 2465 | * error processing. |
| 2466 | */ |
| 2467 | err_slot = AHCI_PREG_CMD_CCS(ahci_pread(ap, AHCI_PREG_CMD)); |
| 2468 | ahci_pwrite(ap, AHCI_PREG_IS, AHCI_PREG_IS_TFES | |
| 2469 | AHCI_PREG_IS_PSS | |
| 2470 | AHCI_PREG_IS_DHRS | |
| 2471 | AHCI_PREG_IS_SDBS); |
| 2472 | is &= ~(AHCI_PREG_IS_TFES | AHCI_PREG_IS_PSS | |
| 2473 | AHCI_PREG_IS_DHRS | AHCI_PREG_IS_SDBS); |
| 2474 | ahci_pwrite(ap, AHCI_PREG_SERR, serr); |
| 2475 | ahci_port_stop(ap, 0); |
| 2476 | ahci_os_hardsleep(10); |
| 2477 | if (tfd & (AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { |
| 2478 | kprintf("%s: Issuing CLO\n", PORTNAME(ap)); |
| 2479 | ahci_port_clo(ap); |
| 2480 | } |
| 2481 | |
| 2482 | /* |
| 2483 | * We are now stopped and need a restart. If we have to |
| 2484 | * process a NCQ error we will temporarily start and then |
| 2485 | * stop the port again, so this condition holds. |
| 2486 | */ |
| 2487 | stopped = 1; |
| 2488 | need = NEED_RESTART; |
| 2489 | |
| 2490 | /* |
| 2491 | * ATAPI errors are fairly common from probing, just |
| 2492 | * report disk errors or if bootverbose is on. |
| 2493 | */ |
| 2494 | if (bootverbose || ap->ap_type != ATA_PORT_T_ATAPI) { |
| 2495 | kprintf("%s: TFES slot %d ci_saved = %08x\n", |
| 2496 | PORTNAME(ap), err_slot, ci_saved); |
| 2497 | } |
| 2498 | |
| 2499 | /* |
| 2500 | * If we got an error on an error CCB just complete it |
| 2501 | * with an error. ci_saved has the mask to restart |
| 2502 | * (the err_ccb will be removed from it by finish_error). |
| 2503 | */ |
| 2504 | if (ap->ap_flags & AP_F_ERR_CCB_RESERVED) { |
| 2505 | err_slot = ap->ap_err_ccb->ccb_slot; |
| 2506 | goto finish_error; |
| 2507 | } |
| 2508 | |
| 2509 | /* |
| 2510 | * If NCQ commands were active get the error slot from |
| 2511 | * the log page. NCQ is not supported for PM's so this |
| 2512 | * is a direct-attached target. |
| 2513 | * |
| 2514 | * Otherwise if no commands were active we have a problem. |
| 2515 | * |
| 2516 | * Otherwise if the error slot is bad we have a problem. |
| 2517 | * |
| 2518 | * Otherwise process the error for the slot. |
| 2519 | */ |
| 2520 | if (ap->ap_sactive) { |
| 2521 | ahci_port_start(ap); |
| 2522 | err_slot = ahci_port_read_ncq_error(ap, 0); |
| 2523 | ahci_port_stop(ap, 0); |
| 2524 | } else if (ap->ap_active == 0) { |
| 2525 | kprintf("%s: TFES with no commands pending\n", |
| 2526 | PORTNAME(ap)); |
| 2527 | err_slot = -1; |
| 2528 | } else if (err_slot < 0 || err_slot >= ap->ap_sc->sc_ncmds) { |
| 2529 | kprintf("%s: bad error slot %d\n", |
| 2530 | PORTNAME(ap), err_slot); |
| 2531 | err_slot = -1; |
| 2532 | } else { |
| 2533 | ccb = &ap->ap_ccbs[err_slot]; |
| 2534 | |
| 2535 | /* |
| 2536 | * Validate the errored ccb. Note that ccb_at can |
| 2537 | * be NULL for direct-attached ccb's. |
| 2538 | * |
| 2539 | * Copy received taskfile data from the RFIS. |
| 2540 | */ |
| 2541 | if (ccb->ccb_xa.state == ATA_S_ONCHIP) { |
| 2542 | ccb_at = ccb->ccb_xa.at; |
| 2543 | memcpy(&ccb->ccb_xa.rfis, ap->ap_rfis->rfis, |
| 2544 | sizeof(struct ata_fis_d2h)); |
| 2545 | if (bootverbose) { |
| 2546 | kprintf("%s: Copying rfis slot %d\n", |
| 2547 | ATANAME(ap, ccb_at), err_slot); |
| 2548 | } |
| 2549 | } else { |
| 2550 | kprintf("%s: Cannot copy rfis, CCB slot " |
| 2551 | "%d is not on-chip (state=%d)\n", |
| 2552 | ATANAME(ap, ccb->ccb_xa.at), |
| 2553 | err_slot, ccb->ccb_xa.state); |
| 2554 | err_slot = -1; |
| 2555 | } |
| 2556 | } |
| 2557 | |
| 2558 | /* |
| 2559 | * If we could not determine the errored slot then |
| 2560 | * reset the port. |
| 2561 | */ |
| 2562 | if (err_slot < 0) { |
| 2563 | kprintf("%s: TFES: Unable to determine errored slot\n", |
| 2564 | PORTNAME(ap)); |
| 2565 | if (ap->ap_flags & AP_F_IN_RESET) |
| 2566 | goto fatal; |
| 2567 | goto failall; |
| 2568 | } |
| 2569 | |
| 2570 | /* |
| 2571 | * Finish error on slot. We will restart ci_saved |
| 2572 | * commands except the errored slot which we generate |
| 2573 | * a failure for. |
| 2574 | */ |
| 2575 | finish_error: |
| 2576 | ccb = &ap->ap_ccbs[err_slot]; |
| 2577 | ci_saved &= ~(1 << err_slot); |
| 2578 | KKASSERT(ccb->ccb_xa.state == ATA_S_ONCHIP); |
| 2579 | ccb->ccb_xa.state = ATA_S_ERROR; |
| 2580 | } else if (is & AHCI_PREG_IS_DHRS) { |
| 2581 | /* |
| 2582 | * Command posted D2H register FIS to the rfis (non-blocking). |
| 2583 | * |
| 2584 | * A normal completion with an error may set DHRS instead |
| 2585 | * of TFES. The CCS bits are only valid if ERR was set. |
| 2586 | * If ERR is set command processing was probably stopped. |
| 2587 | * |
| 2588 | * If ERR was not set we can only copy-back data for |
| 2589 | * exclusive-mode commands because otherwise we won't know |
| 2590 | * which tag the rfis belonged to. |
| 2591 | * |
| 2592 | * err_slot must be read from the CCS before any other port |
| 2593 | * action, such as stopping the port. |
| 2594 | * |
| 2595 | * WARNING! This is not well documented in the AHCI spec. |
| 2596 | * It can be found in the state machine tables |
| 2597 | * but not in the explanations. |
| 2598 | */ |
| 2599 | u_int32_t tfd; |
| 2600 | u_int32_t cmd; |
| 2601 | int err_slot; |
| 2602 | |
| 2603 | tfd = ahci_pread(ap, AHCI_PREG_TFD); |
| 2604 | cmd = ahci_pread(ap, AHCI_PREG_CMD); |
| 2605 | |
| 2606 | if ((tfd & AHCI_PREG_TFD_STS_ERR) && |
| 2607 | (cmd & AHCI_PREG_CMD_CR) == 0) { |
| 2608 | err_slot = AHCI_PREG_CMD_CCS( |
| 2609 | ahci_pread(ap, AHCI_PREG_CMD)); |
| 2610 | ccb = &ap->ap_ccbs[err_slot]; |
| 2611 | kprintf("%s: DHRS tfd=%b err_slot=%d cmd=%02x\n", |
| 2612 | PORTNAME(ap), |
| 2613 | tfd, AHCI_PFMT_TFD_STS, |
| 2614 | err_slot, ccb->ccb_xa.fis->command); |
| 2615 | goto process_error; |
| 2616 | } |
| 2617 | /* |
| 2618 | * NO ELSE... copy back is in the normal command completion |
| 2619 | * code and only if no error occured and ATA_F_AUTOSENSE |
| 2620 | * was set. |
| 2621 | */ |
| 2622 | ahci_pwrite(ap, AHCI_PREG_IS, AHCI_PREG_IS_DHRS); |
| 2623 | } |
| 2624 | |
| 2625 | /* |
| 2626 | * Device notification to us (non-blocking) |
| 2627 | * |
| 2628 | * NOTE! On some parts notification bits can cause an IPMS |
| 2629 | * interrupt instead of a SDBS interrupt. |
| 2630 | * |
| 2631 | * NOTE! On some parts (e.g. VBOX, probably intel ICHx), |
| 2632 | * SDBS notifies us of the completion of a NCQ command |
| 2633 | * and DBS does not. |
| 2634 | */ |
| 2635 | if (is & (AHCI_PREG_IS_SDBS | AHCI_PREG_IS_IPMS)) { |
| 2636 | u_int32_t data; |
| 2637 | |
| 2638 | ahci_pwrite(ap, AHCI_PREG_IS, |
| 2639 | AHCI_PREG_IS_SDBS | AHCI_PREG_IS_IPMS); |
| 2640 | if (sc->sc_cap & AHCI_REG_CAP_SSNTF) { |
| 2641 | data = ahci_pread(ap, AHCI_PREG_SNTF); |
| 2642 | if (data) { |
| 2643 | ahci_pwrite(ap, AHCI_PREG_IS, |
| 2644 | AHCI_PREG_IS_SDBS); |
| 2645 | kprintf("%s: NOTIFY %08x\n", |
| 2646 | PORTNAME(ap), data); |
| 2647 | ahci_pwrite(ap, AHCI_PREG_SERR, |
| 2648 | AHCI_PREG_SERR_DIAG_N); |
| 2649 | ahci_pwrite(ap, AHCI_PREG_SNTF, data); |
| 2650 | ahci_cam_changed(ap, NULL, -1); |
| 2651 | } |
| 2652 | } |
| 2653 | is &= ~(AHCI_PREG_IS_SDBS | AHCI_PREG_IS_IPMS); |
| 2654 | } |
| 2655 | |
| 2656 | /* |
| 2657 | * Spurious IFS errors (blockable) - when AP_F_IGNORE_IFS is set. |
| 2658 | * |
| 2659 | * Spurious IFS errors can occur while we are doing a reset |
| 2660 | * sequence through a PM, probably due to an unexpected FIS |
| 2661 | * being received during the PM target reset sequence. Chipsets |
| 2662 | * are supposed to mask these events but some do not. |
| 2663 | * |
| 2664 | * Try to recover from the condition. |
| 2665 | */ |
| 2666 | if ((is & AHCI_PREG_IS_IFS) && (ap->ap_flags & AP_F_IGNORE_IFS)) { |
| 2667 | u_int32_t serr = ahci_pread(ap, AHCI_PREG_SERR); |
| 2668 | if ((ap->ap_flags & AP_F_IFS_IGNORED) == 0) { |
| 2669 | kprintf("%s: IFS during PM probe (ignored) " |
| 2670 | "IS=%b, SERR=%b\n", |
| 2671 | PORTNAME(ap), |
| 2672 | is, AHCI_PFMT_IS, |
| 2673 | serr, AHCI_PFMT_SERR); |
| 2674 | ap->ap_flags |= AP_F_IFS_IGNORED; |
| 2675 | } |
| 2676 | |
| 2677 | /* |
| 2678 | * Try to clear the error condition. The IFS error killed |
| 2679 | * the port so stop it so we can restart it. |
| 2680 | */ |
| 2681 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 2682 | ahci_pwrite(ap, AHCI_PREG_IS, AHCI_PREG_IS_IFS); |
| 2683 | is &= ~AHCI_PREG_IS_IFS; |
| 2684 | need = NEED_RESTART; |
| 2685 | goto failall; |
| 2686 | } |
| 2687 | |
| 2688 | /* |
| 2689 | * Port change (hot-plug) (blockable). |
| 2690 | * |
| 2691 | * A PRCS interrupt can occur: |
| 2692 | * (1) On hot-unplug / normal-unplug (phy lost) |
| 2693 | * (2) Sometimes on hot-plug too. |
| 2694 | * |
| 2695 | * A PCS interrupt can occur in a number of situations: |
| 2696 | * (1) On hot-plug once communication is established |
| 2697 | * (2) On hot-unplug sometimes. |
| 2698 | * (3) For chipsets with badly written firmware it can occur |
| 2699 | * during INIT/RESET sequences due to the device reset. |
| 2700 | * (4) For chipsets with badly written firmware it can occur |
| 2701 | * when it thinks an unsolicited COMRESET is received |
| 2702 | * during a INIT/RESET sequence, even though we actually |
| 2703 | * did request it. |
| 2704 | * |
| 2705 | * XXX We can then check the CPS (Cold Presence State) bit, if |
| 2706 | * supported, to determine if a device is plugged in or not and do |
| 2707 | * the right thing. |
| 2708 | * |
| 2709 | * PCS interrupts are cleared by clearing DIAG_X. If this occurs |
| 2710 | * command processing is automatically stopped (CR goes inactive) |
| 2711 | * and the port must be stopped and restarted. |
| 2712 | * |
| 2713 | * WARNING: AMD parts (e.g. 880G chipset, probably others) can |
| 2714 | * generate PCS on initialization even when device is |
| 2715 | * already connected up. It is unclear why this happens. |
| 2716 | * Depending on the state of the device detect this can |
| 2717 | * cause us to go into harsh reinit or hot-plug insertion |
| 2718 | * mode. |
| 2719 | * |
| 2720 | * WARNING: PCS errors can be repetitive (e.g. unsolicited COMRESET |
| 2721 | * continues to flow in from the device), we must clear the |
| 2722 | * interrupt in all cases and enforce a delay to prevent |
| 2723 | * a livelock and give the port time to settle down. |
| 2724 | * Only print something if we aren't in INIT/HARD-RESET. |
| 2725 | */ |
| 2726 | if (is & (AHCI_PREG_IS_PCS | AHCI_PREG_IS_PRCS)) { |
| 2727 | /* |
| 2728 | * Try to clear the error. Because of the repetitiveness |
| 2729 | * of this interrupt avoid any harsh action if the port is |
| 2730 | * already in the init or hard-reset probe state. |
| 2731 | */ |
| 2732 | ahci_pwrite(ap, AHCI_PREG_SERR, -1); |
| 2733 | /* (AHCI_PREG_SERR_DIAG_N | AHCI_PREG_SERR_DIAG_X) */ |
| 2734 | ahci_pwrite(ap, AHCI_PREG_IS, |
| 2735 | is & (AHCI_PREG_IS_PCS | AHCI_PREG_IS_PRCS)); |
| 2736 | |
| 2737 | /* |
| 2738 | * Ignore PCS/PRCS errors during probes (but still clear the |
| 2739 | * interrupt to avoid a livelock). The AMD 880/890/SB850 |
| 2740 | * chipsets do not mask PCS/PRCS internally during reset |
| 2741 | * sequences. |
| 2742 | */ |
| 2743 | if (ap->ap_flags & AP_F_IN_RESET) |
| 2744 | goto skip_pcs; |
| 2745 | |
| 2746 | if (ap->ap_probe == ATA_PROBE_NEED_INIT || |
| 2747 | ap->ap_probe == ATA_PROBE_NEED_HARD_RESET) { |
| 2748 | is &= ~(AHCI_PREG_IS_PCS | AHCI_PREG_IS_PRCS); |
| 2749 | need = NEED_NOTHING; |
| 2750 | ahci_os_sleep(1000); |
| 2751 | goto failall; |
| 2752 | } |
| 2753 | kprintf("%s: Transient Errors: %b (%d)\n", |
| 2754 | PORTNAME(ap), is, AHCI_PFMT_IS, ap->ap_probe); |
| 2755 | is &= ~(AHCI_PREG_IS_PCS | AHCI_PREG_IS_PRCS); |
| 2756 | ahci_os_sleep(200); |
| 2757 | |
| 2758 | /* |
| 2759 | * Stop the port and figure out what to do next. |
| 2760 | */ |
| 2761 | ahci_port_stop(ap, 0); |
| 2762 | stopped = 1; |
| 2763 | |
| 2764 | switch (ahci_pread(ap, AHCI_PREG_SSTS) & AHCI_PREG_SSTS_DET) { |
| 2765 | case AHCI_PREG_SSTS_DET_DEV: |
| 2766 | /* |
| 2767 | * Device detect |
| 2768 | */ |
| 2769 | if (ap->ap_probe == ATA_PROBE_FAILED) { |
| 2770 | need = NEED_HOTPLUG_INSERT; |
| 2771 | goto fatal; |
| 2772 | } |
| 2773 | need = NEED_RESTART; |
| 2774 | break; |
| 2775 | case AHCI_PREG_SSTS_DET_DEV_NE: |
| 2776 | /* |
| 2777 | * Device not communicating. AMD parts seem to |
| 2778 | * like to throw this error on initialization |
| 2779 | * for no reason that I can fathom. |
| 2780 | */ |
| 2781 | kprintf("%s: Device present but not communicating, " |
| 2782 | "attempting port restart\n", |
| 2783 | PORTNAME(ap)); |
| 2784 | need = NEED_REINIT; |
| 2785 | goto fatal; |
| 2786 | default: |
| 2787 | if (ap->ap_probe != ATA_PROBE_FAILED) { |
| 2788 | need = NEED_HOTPLUG_REMOVE; |
| 2789 | goto fatal; |
| 2790 | } |
| 2791 | need = NEED_RESTART; |
| 2792 | break; |
| 2793 | } |
| 2794 | skip_pcs: |
| 2795 | ; |
| 2796 | } |
| 2797 | |
| 2798 | /* |
| 2799 | * Check for remaining errors - they are fatal. (blockable) |
| 2800 | */ |
| 2801 | if (is & (AHCI_PREG_IS_TFES | AHCI_PREG_IS_HBFS | AHCI_PREG_IS_IFS | |
| 2802 | AHCI_PREG_IS_OFS | AHCI_PREG_IS_UFS)) { |
| 2803 | u_int32_t serr; |
| 2804 | |
| 2805 | ahci_pwrite(ap, AHCI_PREG_IS, |
| 2806 | is & (AHCI_PREG_IS_TFES | AHCI_PREG_IS_HBFS | |
| 2807 | AHCI_PREG_IS_IFS | AHCI_PREG_IS_OFS | |
| 2808 | AHCI_PREG_IS_UFS)); |
| 2809 | serr = ahci_pread(ap, AHCI_PREG_SERR); |
| 2810 | kprintf("%s: Unrecoverable errors (IS: %b, SERR: %b), " |
| 2811 | "disabling port.\n", |
| 2812 | PORTNAME(ap), |
| 2813 | is, AHCI_PFMT_IS, |
| 2814 | serr, AHCI_PFMT_SERR |
| 2815 | ); |
| 2816 | is &= ~(AHCI_PREG_IS_TFES | AHCI_PREG_IS_HBFS | |
| 2817 | AHCI_PREG_IS_IFS | AHCI_PREG_IS_OFS | |
| 2818 | AHCI_PREG_IS_UFS); |
| 2819 | |
| 2820 | /* |
| 2821 | * Fail all commands but then what? For now try to |
| 2822 | * reinitialize the port. |
| 2823 | */ |
| 2824 | need = NEED_REINIT; |
| 2825 | goto fatal; |
| 2826 | } |
| 2827 | |
| 2828 | /* |
| 2829 | * Fail all outstanding commands if we know the port won't recover. |
| 2830 | * |
| 2831 | * We may have a ccb_at if the failed command is known and was |
| 2832 | * being sent to a device over a port multiplier (PM). In this |
| 2833 | * case if the port itself has not completely failed we fail just |
| 2834 | * the commands related to that target. |
| 2835 | * |
| 2836 | * ci_saved contains the mask of active commands as of when the |
| 2837 | * error occured, prior to any port stops. |
| 2838 | */ |
| 2839 | if (ap->ap_state == AP_S_FATAL_ERROR) { |
| 2840 | fatal: |
| 2841 | ap->ap_state = AP_S_FATAL_ERROR; |
| 2842 | failall: |
| 2843 | ahci_port_stop(ap, 0); |
| 2844 | stopped = 1; |
| 2845 | |
| 2846 | /* |
| 2847 | * Error all the active slots not already errored. |
| 2848 | */ |
| 2849 | ci_masked = ci_saved & *active & ~ap->ap_expired; |
| 2850 | if (ci_masked) { |
| 2851 | kprintf("%s: Failing all commands: %08x\n", |
| 2852 | PORTNAME(ap), ci_masked); |
| 2853 | } |
| 2854 | |
| 2855 | while (ci_masked) { |
| 2856 | slot = ffs(ci_masked) - 1; |
| 2857 | ccb = &ap->ap_ccbs[slot]; |
| 2858 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 2859 | ap->ap_expired |= 1 << slot; |
| 2860 | ci_saved &= ~(1 << slot); |
| 2861 | ci_masked &= ~(1 << slot); |
| 2862 | } |
| 2863 | |
| 2864 | /* |
| 2865 | * Clear bits in ci_saved (cause completions to be run) |
| 2866 | * for all slots which are not active. |
| 2867 | */ |
| 2868 | ci_saved &= ~*active; |
| 2869 | |
| 2870 | /* |
| 2871 | * Don't restart the port if our problems were deemed fatal. |
| 2872 | * |
| 2873 | * Also acknowlege all fatal interrupt sources to prevent |
| 2874 | * a livelock. |
| 2875 | */ |
| 2876 | if (ap->ap_state == AP_S_FATAL_ERROR) { |
| 2877 | if (need == NEED_RESTART) |
| 2878 | need = NEED_NOTHING; |
| 2879 | ahci_pwrite(ap, AHCI_PREG_IS, |
| 2880 | AHCI_PREG_IS_TFES | AHCI_PREG_IS_HBFS | |
| 2881 | AHCI_PREG_IS_IFS | AHCI_PREG_IS_OFS | |
| 2882 | AHCI_PREG_IS_UFS); |
| 2883 | } |
| 2884 | } |
| 2885 | |
| 2886 | /* |
| 2887 | * If we are stopped the AHCI chipset is supposed to have cleared |
| 2888 | * CI and SACT. Did it? If it didn't we try very hard to clear |
| 2889 | * the fields otherwise we may end up completing CCBs which are |
| 2890 | * actually still active. |
| 2891 | * |
| 2892 | * IFS errors on (at least) AMD chipsets create this confusion. |
| 2893 | */ |
| 2894 | if (stopped) { |
| 2895 | u_int32_t mask; |
| 2896 | if ((mask = ahci_pactive(ap)) != 0) { |
| 2897 | kprintf("%s: chipset failed to clear " |
| 2898 | "active cmds %08x\n", |
| 2899 | PORTNAME(ap), mask); |
| 2900 | ahci_port_start(ap); |
| 2901 | ahci_port_stop(ap, 0); |
| 2902 | if ((mask = ahci_pactive(ap)) != 0) { |
| 2903 | kprintf("%s: unable to prod the chip into " |
| 2904 | "clearing active cmds %08x\n", |
| 2905 | PORTNAME(ap), mask); |
| 2906 | /* what do we do now? */ |
| 2907 | } |
| 2908 | } |
| 2909 | } |
| 2910 | |
| 2911 | /* |
| 2912 | * CCB completion (non blocking). |
| 2913 | * |
| 2914 | * CCB completion is detected by noticing its slot's bit in CI has |
| 2915 | * changed to zero some time after we activated it. |
| 2916 | * If we are polling, we may only be interested in particular slot(s). |
| 2917 | * |
| 2918 | * Any active bits not saved are completed within the restrictions |
| 2919 | * imposed by the caller. |
| 2920 | */ |
| 2921 | ci_masked = ~ci_saved & *active; |
| 2922 | while (ci_masked) { |
| 2923 | slot = ffs(ci_masked) - 1; |
| 2924 | ccb = &ap->ap_ccbs[slot]; |
| 2925 | ci_masked &= ~(1 << slot); |
| 2926 | |
| 2927 | DPRINTF(AHCI_D_INTR, "%s: slot %d is complete%s\n", |
| 2928 | PORTNAME(ap), slot, ccb->ccb_xa.state == ATA_S_ERROR ? |
| 2929 | " (error)" : ""); |
| 2930 | |
| 2931 | bus_dmamap_sync(sc->sc_tag_cmdh, |
| 2932 | AHCI_DMA_MAP(ap->ap_dmamem_cmd_list), |
| 2933 | BUS_DMASYNC_POSTWRITE); |
| 2934 | |
| 2935 | bus_dmamap_sync(sc->sc_tag_cmdt, |
| 2936 | AHCI_DMA_MAP(ap->ap_dmamem_cmd_table), |
| 2937 | BUS_DMASYNC_POSTWRITE); |
| 2938 | |
| 2939 | bus_dmamap_sync(sc->sc_tag_rfis, |
| 2940 | AHCI_DMA_MAP(ap->ap_dmamem_rfis), |
| 2941 | BUS_DMASYNC_POSTREAD); |
| 2942 | |
| 2943 | *active &= ~(1 << ccb->ccb_slot); |
| 2944 | if (active == &ap->ap_active) { |
| 2945 | KKASSERT(ap->ap_active_cnt > 0); |
| 2946 | --ap->ap_active_cnt; |
| 2947 | } |
| 2948 | |
| 2949 | /* |
| 2950 | * Complete the ccb. If the ccb was marked expired it |
| 2951 | * was probably already removed from the command processor, |
| 2952 | * so don't take the clear ci_saved bit as meaning the |
| 2953 | * command actually succeeded, it didn't. |
| 2954 | */ |
| 2955 | if (ap->ap_expired & (1 << ccb->ccb_slot)) { |
| 2956 | ap->ap_expired &= ~(1 << ccb->ccb_slot); |
| 2957 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 2958 | ccb->ccb_done(ccb); |
| 2959 | ccb->ccb_xa.complete(&ccb->ccb_xa); |
| 2960 | } else { |
| 2961 | if (ccb->ccb_xa.state == ATA_S_ONCHIP) { |
| 2962 | ccb->ccb_xa.state = ATA_S_COMPLETE; |
| 2963 | if (ccb->ccb_xa.flags & ATA_F_AUTOSENSE) { |
| 2964 | memcpy(&ccb->ccb_xa.rfis, |
| 2965 | ap->ap_rfis->rfis, |
| 2966 | sizeof(struct ata_fis_d2h)); |
| 2967 | if (ccb->ccb_xa.state == ATA_S_TIMEOUT) |
| 2968 | ccb->ccb_xa.state = ATA_S_ERROR; |
| 2969 | } |
| 2970 | } |
| 2971 | ccb->ccb_done(ccb); |
| 2972 | } |
| 2973 | } |
| 2974 | |
| 2975 | /* |
| 2976 | * Cleanup. Will not be set if non-blocking. |
| 2977 | */ |
| 2978 | switch(need) { |
| 2979 | case NEED_NOTHING: |
| 2980 | /* |
| 2981 | * If operating normally and not stopped the interrupt was |
| 2982 | * probably just a normal completion and we may be able to |
| 2983 | * issue more commands. |
| 2984 | */ |
| 2985 | if (stopped == 0 && ap->ap_state != AP_S_FATAL_ERROR) |
| 2986 | ahci_issue_pending_commands(ap, NULL); |
| 2987 | break; |
| 2988 | case NEED_RESTART: |
| 2989 | /* |
| 2990 | * A recoverable error occured and we can restart outstanding |
| 2991 | * commands on the port. |
| 2992 | */ |
| 2993 | ci_saved &= ~ap->ap_expired; |
| 2994 | if (ci_saved) { |
| 2995 | kprintf("%s: Restart %08x\n", PORTNAME(ap), ci_saved); |
| 2996 | ahci_issue_saved_commands(ap, ci_saved); |
| 2997 | } |
| 2998 | |
| 2999 | /* |
| 3000 | * Potentially issue new commands if not in a failed |
| 3001 | * state. |
| 3002 | */ |
| 3003 | if (ap->ap_state != AP_S_FATAL_ERROR) { |
| 3004 | ahci_port_start(ap); |
| 3005 | ahci_issue_pending_commands(ap, NULL); |
| 3006 | } |
| 3007 | break; |
| 3008 | case NEED_REINIT: |
| 3009 | /* |
| 3010 | * Something horrible happened to the port and we |
| 3011 | * need to reinitialize it. |
| 3012 | */ |
| 3013 | kprintf("%s: REINIT - Attempting to reinitialize the port " |
| 3014 | "after it had a horrible accident\n", |
| 3015 | PORTNAME(ap)); |
| 3016 | ap->ap_flags |= AP_F_IN_RESET; |
| 3017 | ap->ap_flags |= AP_F_HARSH_REINIT; |
| 3018 | ap->ap_probe = ATA_PROBE_NEED_INIT; |
| 3019 | ahci_cam_changed(ap, NULL, -1); |
| 3020 | break; |
| 3021 | case NEED_HOTPLUG_INSERT: |
| 3022 | /* |
| 3023 | * A hot-plug insertion event has occured and all |
| 3024 | * outstanding commands have already been revoked. |
| 3025 | * |
| 3026 | * Don't recurse if this occurs while we are |
| 3027 | * resetting the port. |
| 3028 | */ |
| 3029 | if ((ap->ap_flags & AP_F_IN_RESET) == 0) { |
| 3030 | kprintf("%s: HOTPLUG - Device inserted\n", |
| 3031 | PORTNAME(ap)); |
| 3032 | ap->ap_probe = ATA_PROBE_NEED_INIT; |
| 3033 | ahci_cam_changed(ap, NULL, -1); |
| 3034 | } |
| 3035 | break; |
| 3036 | case NEED_HOTPLUG_REMOVE: |
| 3037 | /* |
| 3038 | * A hot-plug removal event has occured and all |
| 3039 | * outstanding commands have already been revoked. |
| 3040 | * |
| 3041 | * Don't recurse if this occurs while we are |
| 3042 | * resetting the port. |
| 3043 | */ |
| 3044 | if ((ap->ap_flags & AP_F_IN_RESET) == 0) { |
| 3045 | kprintf("%s: HOTPLUG - Device removed\n", |
| 3046 | PORTNAME(ap)); |
| 3047 | ahci_port_hardstop(ap); |
| 3048 | /* ap_probe set to failed */ |
| 3049 | ahci_cam_changed(ap, NULL, -1); |
| 3050 | } |
| 3051 | break; |
| 3052 | default: |
| 3053 | break; |
| 3054 | } |
| 3055 | } |
| 3056 | |
| 3057 | struct ahci_ccb * |
| 3058 | ahci_get_ccb(struct ahci_port *ap) |
| 3059 | { |
| 3060 | struct ahci_ccb *ccb; |
| 3061 | |
| 3062 | lockmgr(&ap->ap_ccb_lock, LK_EXCLUSIVE); |
| 3063 | ccb = TAILQ_FIRST(&ap->ap_ccb_free); |
| 3064 | if (ccb != NULL) { |
| 3065 | KKASSERT(ccb->ccb_xa.state == ATA_S_PUT); |
| 3066 | TAILQ_REMOVE(&ap->ap_ccb_free, ccb, ccb_entry); |
| 3067 | ccb->ccb_xa.state = ATA_S_SETUP; |
| 3068 | ccb->ccb_xa.flags = 0; |
| 3069 | ccb->ccb_xa.at = NULL; |
| 3070 | } |
| 3071 | lockmgr(&ap->ap_ccb_lock, LK_RELEASE); |
| 3072 | |
| 3073 | return (ccb); |
| 3074 | } |
| 3075 | |
| 3076 | void |
| 3077 | ahci_put_ccb(struct ahci_ccb *ccb) |
| 3078 | { |
| 3079 | struct ahci_port *ap = ccb->ccb_port; |
| 3080 | |
| 3081 | ccb->ccb_xa.state = ATA_S_PUT; |
| 3082 | lockmgr(&ap->ap_ccb_lock, LK_EXCLUSIVE); |
| 3083 | TAILQ_INSERT_TAIL(&ap->ap_ccb_free, ccb, ccb_entry); |
| 3084 | lockmgr(&ap->ap_ccb_lock, LK_RELEASE); |
| 3085 | } |
| 3086 | |
| 3087 | struct ahci_ccb * |
| 3088 | ahci_get_err_ccb(struct ahci_port *ap) |
| 3089 | { |
| 3090 | struct ahci_ccb *err_ccb; |
| 3091 | u_int32_t sact; |
| 3092 | u_int32_t ci; |
| 3093 | |
| 3094 | /* No commands may be active on the chip. */ |
| 3095 | |
| 3096 | if (ap->ap_sc->sc_cap & AHCI_REG_CAP_SNCQ) { |
| 3097 | sact = ahci_pread(ap, AHCI_PREG_SACT); |
| 3098 | if (sact != 0) { |
| 3099 | kprintf("%s: ahci_get_err_ccb but SACT %08x != 0?\n", |
| 3100 | PORTNAME(ap), sact); |
| 3101 | } |
| 3102 | } |
| 3103 | ci = ahci_pread(ap, AHCI_PREG_CI); |
| 3104 | if (ci) { |
| 3105 | kprintf("%s: ahci_get_err_ccb: ci not 0 (%08x)\n", |
| 3106 | ap->ap_name, ci); |
| 3107 | } |
| 3108 | KKASSERT(ci == 0); |
| 3109 | KKASSERT((ap->ap_flags & AP_F_ERR_CCB_RESERVED) == 0); |
| 3110 | ap->ap_flags |= AP_F_ERR_CCB_RESERVED; |
| 3111 | |
| 3112 | /* Save outstanding command state. */ |
| 3113 | ap->ap_err_saved_active = ap->ap_active; |
| 3114 | ap->ap_err_saved_active_cnt = ap->ap_active_cnt; |
| 3115 | ap->ap_err_saved_sactive = ap->ap_sactive; |
| 3116 | |
| 3117 | /* |
| 3118 | * Pretend we have no commands outstanding, so that completions won't |
| 3119 | * run prematurely. |
| 3120 | */ |
| 3121 | ap->ap_active = ap->ap_active_cnt = ap->ap_sactive = 0; |
| 3122 | |
| 3123 | /* |
| 3124 | * Grab a CCB to use for error recovery. This should never fail, as |
| 3125 | * we ask atascsi to reserve one for us at init time. |
| 3126 | */ |
| 3127 | err_ccb = ap->ap_err_ccb; |
| 3128 | KKASSERT(err_ccb != NULL); |
| 3129 | err_ccb->ccb_xa.flags = 0; |
| 3130 | err_ccb->ccb_done = ahci_empty_done; |
| 3131 | |
| 3132 | return err_ccb; |
| 3133 | } |
| 3134 | |
| 3135 | void |
| 3136 | ahci_put_err_ccb(struct ahci_ccb *ccb) |
| 3137 | { |
| 3138 | struct ahci_port *ap = ccb->ccb_port; |
| 3139 | u_int32_t sact; |
| 3140 | u_int32_t ci; |
| 3141 | |
| 3142 | KKASSERT((ap->ap_flags & AP_F_ERR_CCB_RESERVED) != 0); |
| 3143 | |
| 3144 | /* |
| 3145 | * No commands may be active on the chip |
| 3146 | */ |
| 3147 | if (ap->ap_sc->sc_cap & AHCI_REG_CAP_SNCQ) { |
| 3148 | sact = ahci_pread(ap, AHCI_PREG_SACT); |
| 3149 | if (sact) { |
| 3150 | panic("ahci_port_err_ccb(%d) but SACT %08x != 0\n", |
| 3151 | ccb->ccb_slot, sact); |
| 3152 | } |
| 3153 | } |
| 3154 | ci = ahci_pread(ap, AHCI_PREG_CI); |
| 3155 | if (ci) { |
| 3156 | panic("ahci_put_err_ccb(%d) but CI %08x != 0 " |
| 3157 | "(act=%08x sact=%08x)\n", |
| 3158 | ccb->ccb_slot, ci, |
| 3159 | ap->ap_active, ap->ap_sactive); |
| 3160 | } |
| 3161 | |
| 3162 | KKASSERT(ccb == ap->ap_err_ccb); |
| 3163 | |
| 3164 | /* Restore outstanding command state */ |
| 3165 | ap->ap_sactive = ap->ap_err_saved_sactive; |
| 3166 | ap->ap_active_cnt = ap->ap_err_saved_active_cnt; |
| 3167 | ap->ap_active = ap->ap_err_saved_active; |
| 3168 | |
| 3169 | ap->ap_flags &= ~AP_F_ERR_CCB_RESERVED; |
| 3170 | } |
| 3171 | |
| 3172 | /* |
| 3173 | * Read log page to get NCQ error. |
| 3174 | * |
| 3175 | * NOTE: NCQ not currently supported on port multipliers. XXX |
| 3176 | */ |
| 3177 | int |
| 3178 | ahci_port_read_ncq_error(struct ahci_port *ap, int target) |
| 3179 | { |
| 3180 | struct ata_log_page_10h *log; |
| 3181 | struct ahci_ccb *ccb; |
| 3182 | struct ahci_ccb *ccb2; |
| 3183 | struct ahci_cmd_hdr *cmd_slot; |
| 3184 | struct ata_fis_h2d *fis; |
| 3185 | int err_slot; |
| 3186 | |
| 3187 | if (bootverbose) { |
| 3188 | kprintf("%s: READ LOG PAGE target %d\n", PORTNAME(ap), |
| 3189 | target); |
| 3190 | } |
| 3191 | |
| 3192 | /* |
| 3193 | * Prep error CCB for READ LOG EXT, page 10h, 1 sector. |
| 3194 | * |
| 3195 | * Getting err_ccb clears active/sactive/active_cnt, putting |
| 3196 | * it back restores the fields. |
| 3197 | */ |
| 3198 | ccb = ahci_get_err_ccb(ap); |
| 3199 | ccb->ccb_xa.flags = ATA_F_READ | ATA_F_POLL; |
| 3200 | ccb->ccb_xa.data = ap->ap_err_scratch; |
| 3201 | ccb->ccb_xa.datalen = 512; |
| 3202 | ccb->ccb_xa.complete = ahci_dummy_done; |
| 3203 | ccb->ccb_xa.at = ap->ap_ata[target]; |
| 3204 | |
| 3205 | fis = (struct ata_fis_h2d *)ccb->ccb_cmd_table->cfis; |
| 3206 | bzero(fis, sizeof(*fis)); |
| 3207 | fis->type = ATA_FIS_TYPE_H2D; |
| 3208 | fis->flags = ATA_H2D_FLAGS_CMD | target; |
| 3209 | fis->command = ATA_C_READ_LOG_EXT; |
| 3210 | fis->lba_low = 0x10; /* queued error log page (10h) */ |
| 3211 | fis->sector_count = 1; /* number of sectors (1) */ |
| 3212 | fis->sector_count_exp = 0; |
| 3213 | fis->lba_mid = 0; /* starting offset */ |
| 3214 | fis->lba_mid_exp = 0; |
| 3215 | fis->device = 0; |
| 3216 | |
| 3217 | cmd_slot = ccb->ccb_cmd_hdr; |
| 3218 | cmd_slot->flags = htole16(5); /* FIS length: 5 DWORDS */ |
| 3219 | |
| 3220 | if (ahci_load_prdt(ccb) != 0) { |
| 3221 | err_slot = -1; |
| 3222 | goto err; |
| 3223 | } |
| 3224 | |
| 3225 | ccb->ccb_xa.state = ATA_S_PENDING; |
| 3226 | if (ahci_poll(ccb, 1000, ahci_quick_timeout) != ATA_S_COMPLETE) { |
| 3227 | err_slot = -1; |
| 3228 | ahci_unload_prdt(ccb); |
| 3229 | goto err; |
| 3230 | } |
| 3231 | ahci_unload_prdt(ccb); |
| 3232 | |
| 3233 | /* |
| 3234 | * Success, extract failed register set and tags from the scratch |
| 3235 | * space. |
| 3236 | */ |
| 3237 | log = (struct ata_log_page_10h *)ap->ap_err_scratch; |
| 3238 | if (log->err_regs.type & ATA_LOG_10H_TYPE_NOTQUEUED) { |
| 3239 | /* Not queued bit was set - wasn't an NCQ error? */ |
| 3240 | kprintf("%s: read NCQ error page, but not an NCQ error?\n", |
| 3241 | PORTNAME(ap)); |
| 3242 | err_slot = -1; |
| 3243 | } else { |
| 3244 | /* Copy back the log record as a D2H register FIS. */ |
| 3245 | err_slot = log->err_regs.type & ATA_LOG_10H_TYPE_TAG_MASK; |
| 3246 | |
| 3247 | ccb2 = &ap->ap_ccbs[err_slot]; |
| 3248 | if (ccb2->ccb_xa.state == ATA_S_ONCHIP) { |
| 3249 | kprintf("%s: read NCQ error page slot=%d\n", |
| 3250 | ATANAME(ap, ccb2->ccb_xa.at), |
| 3251 | err_slot); |
| 3252 | memcpy(&ccb2->ccb_xa.rfis, &log->err_regs, |
| 3253 | sizeof(struct ata_fis_d2h)); |
| 3254 | ccb2->ccb_xa.rfis.type = ATA_FIS_TYPE_D2H; |
| 3255 | ccb2->ccb_xa.rfis.flags = 0; |
| 3256 | } else { |
| 3257 | kprintf("%s: read NCQ error page slot=%d, " |
| 3258 | "slot does not match any cmds\n", |
| 3259 | ATANAME(ccb2->ccb_port, ccb2->ccb_xa.at), |
| 3260 | err_slot); |
| 3261 | err_slot = -1; |
| 3262 | } |
| 3263 | } |
| 3264 | err: |
| 3265 | ahci_put_err_ccb(ccb); |
| 3266 | kprintf("%s: DONE log page target %d err_slot=%d\n", |
| 3267 | PORTNAME(ap), target, err_slot); |
| 3268 | return (err_slot); |
| 3269 | } |
| 3270 | |
| 3271 | /* |
| 3272 | * Allocate memory for various structures DMAd by hardware. The maximum |
| 3273 | * number of segments for these tags is 1 so the DMA memory will have a |
| 3274 | * single physical base address. |
| 3275 | */ |
| 3276 | struct ahci_dmamem * |
| 3277 | ahci_dmamem_alloc(struct ahci_softc *sc, bus_dma_tag_t tag) |
| 3278 | { |
| 3279 | struct ahci_dmamem *adm; |
| 3280 | int error; |
| 3281 | |
| 3282 | adm = kmalloc(sizeof(*adm), M_DEVBUF, M_INTWAIT | M_ZERO); |
| 3283 | |
| 3284 | error = bus_dmamem_alloc(tag, (void **)&adm->adm_kva, |
| 3285 | BUS_DMA_ZERO, &adm->adm_map); |
| 3286 | if (error == 0) { |
| 3287 | adm->adm_tag = tag; |
| 3288 | error = bus_dmamap_load(tag, adm->adm_map, |
| 3289 | adm->adm_kva, |
| 3290 | bus_dma_tag_getmaxsize(tag), |
| 3291 | ahci_dmamem_saveseg, &adm->adm_busaddr, |
| 3292 | 0); |
| 3293 | } |
| 3294 | if (error) { |
| 3295 | if (adm->adm_map) { |
| 3296 | bus_dmamap_destroy(tag, adm->adm_map); |
| 3297 | adm->adm_map = NULL; |
| 3298 | adm->adm_tag = NULL; |
| 3299 | adm->adm_kva = NULL; |
| 3300 | } |
| 3301 | kfree(adm, M_DEVBUF); |
| 3302 | adm = NULL; |
| 3303 | } |
| 3304 | return (adm); |
| 3305 | } |
| 3306 | |
| 3307 | static |
| 3308 | void |
| 3309 | ahci_dmamem_saveseg(void *info, bus_dma_segment_t *segs, int nsegs, int error) |
| 3310 | { |
| 3311 | KKASSERT(error == 0); |
| 3312 | KKASSERT(nsegs == 1); |
| 3313 | *(bus_addr_t *)info = segs->ds_addr; |
| 3314 | } |
| 3315 | |
| 3316 | |
| 3317 | void |
| 3318 | ahci_dmamem_free(struct ahci_softc *sc, struct ahci_dmamem *adm) |
| 3319 | { |
| 3320 | if (adm->adm_map) { |
| 3321 | bus_dmamap_unload(adm->adm_tag, adm->adm_map); |
| 3322 | bus_dmamap_destroy(adm->adm_tag, adm->adm_map); |
| 3323 | adm->adm_map = NULL; |
| 3324 | adm->adm_tag = NULL; |
| 3325 | adm->adm_kva = NULL; |
| 3326 | } |
| 3327 | kfree(adm, M_DEVBUF); |
| 3328 | } |
| 3329 | |
| 3330 | u_int32_t |
| 3331 | ahci_read(struct ahci_softc *sc, bus_size_t r) |
| 3332 | { |
| 3333 | bus_space_barrier(sc->sc_iot, sc->sc_ioh, r, 4, |
| 3334 | BUS_SPACE_BARRIER_READ); |
| 3335 | return (bus_space_read_4(sc->sc_iot, sc->sc_ioh, r)); |
| 3336 | } |
| 3337 | |
| 3338 | void |
| 3339 | ahci_write(struct ahci_softc *sc, bus_size_t r, u_int32_t v) |
| 3340 | { |
| 3341 | bus_space_write_4(sc->sc_iot, sc->sc_ioh, r, v); |
| 3342 | bus_space_barrier(sc->sc_iot, sc->sc_ioh, r, 4, |
| 3343 | BUS_SPACE_BARRIER_WRITE); |
| 3344 | } |
| 3345 | |
| 3346 | u_int32_t |
| 3347 | ahci_pread(struct ahci_port *ap, bus_size_t r) |
| 3348 | { |
| 3349 | bus_space_barrier(ap->ap_sc->sc_iot, ap->ap_ioh, r, 4, |
| 3350 | BUS_SPACE_BARRIER_READ); |
| 3351 | return (bus_space_read_4(ap->ap_sc->sc_iot, ap->ap_ioh, r)); |
| 3352 | } |
| 3353 | |
| 3354 | void |
| 3355 | ahci_pwrite(struct ahci_port *ap, bus_size_t r, u_int32_t v) |
| 3356 | { |
| 3357 | bus_space_write_4(ap->ap_sc->sc_iot, ap->ap_ioh, r, v); |
| 3358 | bus_space_barrier(ap->ap_sc->sc_iot, ap->ap_ioh, r, 4, |
| 3359 | BUS_SPACE_BARRIER_WRITE); |
| 3360 | } |
| 3361 | |
| 3362 | /* |
| 3363 | * Wait up to (timeout) milliseconds for the masked port register to |
| 3364 | * match the target. |
| 3365 | * |
| 3366 | * Timeout is in milliseconds. |
| 3367 | */ |
| 3368 | int |
| 3369 | ahci_pwait_eq(struct ahci_port *ap, int timeout, |
| 3370 | bus_size_t r, u_int32_t mask, u_int32_t target) |
| 3371 | { |
| 3372 | int t; |
| 3373 | |
| 3374 | /* |
| 3375 | * Loop hard up to 100uS |
| 3376 | */ |
| 3377 | for (t = 0; t < 100; ++t) { |
| 3378 | if ((ahci_pread(ap, r) & mask) == target) |
| 3379 | return (0); |
| 3380 | ahci_os_hardsleep(1); /* us */ |
| 3381 | } |
| 3382 | |
| 3383 | do { |
| 3384 | timeout -= ahci_os_softsleep(); |
| 3385 | if ((ahci_pread(ap, r) & mask) == target) |
| 3386 | return (0); |
| 3387 | } while (timeout > 0); |
| 3388 | return (1); |
| 3389 | } |
| 3390 | |
| 3391 | int |
| 3392 | ahci_wait_ne(struct ahci_softc *sc, bus_size_t r, u_int32_t mask, |
| 3393 | u_int32_t target) |
| 3394 | { |
| 3395 | int t; |
| 3396 | |
| 3397 | /* |
| 3398 | * Loop hard up to 100uS |
| 3399 | */ |
| 3400 | for (t = 0; t < 100; ++t) { |
| 3401 | if ((ahci_read(sc, r) & mask) != target) |
| 3402 | return (0); |
| 3403 | ahci_os_hardsleep(1); /* us */ |
| 3404 | } |
| 3405 | |
| 3406 | /* |
| 3407 | * And one millisecond the slow way |
| 3408 | */ |
| 3409 | t = 1000; |
| 3410 | do { |
| 3411 | t -= ahci_os_softsleep(); |
| 3412 | if ((ahci_read(sc, r) & mask) != target) |
| 3413 | return (0); |
| 3414 | } while (t > 0); |
| 3415 | |
| 3416 | return (1); |
| 3417 | } |
| 3418 | |
| 3419 | |
| 3420 | /* |
| 3421 | * Acquire an ata transfer. |
| 3422 | * |
| 3423 | * Pass a NULL at for direct-attached transfers, and a non-NULL at for |
| 3424 | * targets that go through the port multiplier. |
| 3425 | */ |
| 3426 | struct ata_xfer * |
| 3427 | ahci_ata_get_xfer(struct ahci_port *ap, struct ata_port *at) |
| 3428 | { |
| 3429 | struct ahci_ccb *ccb; |
| 3430 | |
| 3431 | ccb = ahci_get_ccb(ap); |
| 3432 | if (ccb == NULL) { |
| 3433 | DPRINTF(AHCI_D_XFER, "%s: ahci_ata_get_xfer: NULL ccb\n", |
| 3434 | PORTNAME(ap)); |
| 3435 | return (NULL); |
| 3436 | } |
| 3437 | |
| 3438 | DPRINTF(AHCI_D_XFER, "%s: ahci_ata_get_xfer got slot %d\n", |
| 3439 | PORTNAME(ap), ccb->ccb_slot); |
| 3440 | |
| 3441 | bzero(ccb->ccb_xa.fis, sizeof(*ccb->ccb_xa.fis)); |
| 3442 | ccb->ccb_xa.at = at; |
| 3443 | ccb->ccb_xa.fis->type = ATA_FIS_TYPE_H2D; |
| 3444 | |
| 3445 | return (&ccb->ccb_xa); |
| 3446 | } |
| 3447 | |
| 3448 | void |
| 3449 | ahci_ata_put_xfer(struct ata_xfer *xa) |
| 3450 | { |
| 3451 | struct ahci_ccb *ccb = (struct ahci_ccb *)xa; |
| 3452 | |
| 3453 | DPRINTF(AHCI_D_XFER, "ahci_ata_put_xfer slot %d\n", ccb->ccb_slot); |
| 3454 | |
| 3455 | ahci_put_ccb(ccb); |
| 3456 | } |
| 3457 | |
| 3458 | int |
| 3459 | ahci_ata_cmd(struct ata_xfer *xa) |
| 3460 | { |
| 3461 | struct ahci_ccb *ccb = (struct ahci_ccb *)xa; |
| 3462 | struct ahci_cmd_hdr *cmd_slot; |
| 3463 | |
| 3464 | KKASSERT(xa->state == ATA_S_SETUP); |
| 3465 | |
| 3466 | if (ccb->ccb_port->ap_state == AP_S_FATAL_ERROR) |
| 3467 | goto failcmd; |
| 3468 | ccb->ccb_done = ahci_ata_cmd_done; |
| 3469 | |
| 3470 | cmd_slot = ccb->ccb_cmd_hdr; |
| 3471 | cmd_slot->flags = htole16(5); /* FIS length (in DWORDs) */ |
| 3472 | if (ccb->ccb_xa.at) { |
| 3473 | cmd_slot->flags |= htole16(ccb->ccb_xa.at->at_target << |
| 3474 | AHCI_CMD_LIST_FLAG_PMP_SHIFT); |
| 3475 | } |
| 3476 | |
| 3477 | if (xa->flags & ATA_F_WRITE) |
| 3478 | cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_W); |
| 3479 | |
| 3480 | if (xa->flags & ATA_F_PACKET) |
| 3481 | cmd_slot->flags |= htole16(AHCI_CMD_LIST_FLAG_A); |
| 3482 | |
| 3483 | if (ahci_load_prdt(ccb) != 0) |
| 3484 | goto failcmd; |
| 3485 | |
| 3486 | xa->state = ATA_S_PENDING; |
| 3487 | |
| 3488 | if (xa->flags & ATA_F_POLL) |
| 3489 | return (ahci_poll(ccb, xa->timeout, ahci_ata_cmd_timeout)); |
| 3490 | |
| 3491 | crit_enter(); |
| 3492 | KKASSERT((xa->flags & ATA_F_TIMEOUT_EXPIRED) == 0); |
| 3493 | xa->flags |= ATA_F_TIMEOUT_DESIRED; |
| 3494 | ahci_start(ccb); |
| 3495 | crit_exit(); |
| 3496 | return (xa->state); |
| 3497 | |
| 3498 | failcmd: |
| 3499 | crit_enter(); |
| 3500 | xa->state = ATA_S_ERROR; |
| 3501 | xa->complete(xa); |
| 3502 | crit_exit(); |
| 3503 | return (ATA_S_ERROR); |
| 3504 | } |
| 3505 | |
| 3506 | void |
| 3507 | ahci_ata_cmd_done(struct ahci_ccb *ccb) |
| 3508 | { |
| 3509 | struct ata_xfer *xa = &ccb->ccb_xa; |
| 3510 | |
| 3511 | /* |
| 3512 | * NOTE: callout does not lock port and may race us modifying |
| 3513 | * the flags, so make sure its stopped. |
| 3514 | */ |
| 3515 | if (xa->flags & ATA_F_TIMEOUT_RUNNING) { |
| 3516 | callout_stop(&ccb->ccb_timeout); |
| 3517 | xa->flags &= ~ATA_F_TIMEOUT_RUNNING; |
| 3518 | } |
| 3519 | xa->flags &= ~(ATA_F_TIMEOUT_DESIRED | ATA_F_TIMEOUT_EXPIRED); |
| 3520 | |
| 3521 | KKASSERT(xa->state != ATA_S_ONCHIP); |
| 3522 | ahci_unload_prdt(ccb); |
| 3523 | |
| 3524 | if (xa->state != ATA_S_TIMEOUT) |
| 3525 | xa->complete(xa); |
| 3526 | } |
| 3527 | |
| 3528 | /* |
| 3529 | * Timeout from callout, MPSAFE - nothing can mess with the CCB's flags |
| 3530 | * while the callout is runing. |
| 3531 | * |
| 3532 | * We can't safely get the port lock here or delay, we could block |
| 3533 | * the callout thread. |
| 3534 | */ |
| 3535 | static void |
| 3536 | ahci_ata_cmd_timeout_unserialized(void *arg) |
| 3537 | { |
| 3538 | struct ahci_ccb *ccb = arg; |
| 3539 | struct ahci_port *ap = ccb->ccb_port; |
| 3540 | |
| 3541 | ccb->ccb_xa.flags &= ~ATA_F_TIMEOUT_RUNNING; |
| 3542 | ccb->ccb_xa.flags |= ATA_F_TIMEOUT_EXPIRED; |
| 3543 | ahci_os_signal_port_thread(ap, AP_SIGF_TIMEOUT); |
| 3544 | } |
| 3545 | |
| 3546 | /* |
| 3547 | * Timeout code, typically called when the port command processor is running. |
| 3548 | * |
| 3549 | * We have to be very very careful here. We cannot stop the port unless |
| 3550 | * CR is already clear or the only active commands remaining are timed-out |
| 3551 | * ones. Otherwise stopping the port will race the command processor and |
| 3552 | * we can lose events. While we can theoretically just restart everything |
| 3553 | * that could result in a double-issue which will not work for ATAPI commands. |
| 3554 | */ |
| 3555 | void |
| 3556 | ahci_ata_cmd_timeout(struct ahci_ccb *ccb) |
| 3557 | { |
| 3558 | struct ata_xfer *xa = &ccb->ccb_xa; |
| 3559 | struct ahci_port *ap = ccb->ccb_port; |
| 3560 | struct ata_port *at; |
| 3561 | u_int32_t ci_saved; |
| 3562 | u_int32_t mask; |
| 3563 | int slot; |
| 3564 | |
| 3565 | at = ccb->ccb_xa.at; |
| 3566 | |
| 3567 | kprintf("%s: CMD TIMEOUT state=%d slot=%d\n" |
| 3568 | "\tcmd-reg 0x%b\n" |
| 3569 | "\tsactive=%08x active=%08x expired=%08x\n" |
| 3570 | "\t sact=%08x ci=%08x\n" |
| 3571 | "\t STS=%b\n", |
| 3572 | ATANAME(ap, at), |
| 3573 | ccb->ccb_xa.state, ccb->ccb_slot, |
| 3574 | ahci_pread(ap, AHCI_PREG_CMD), AHCI_PFMT_CMD, |
| 3575 | ap->ap_sactive, ap->ap_active, ap->ap_expired, |
| 3576 | ahci_pread(ap, AHCI_PREG_SACT), |
| 3577 | ahci_pread(ap, AHCI_PREG_CI), |
| 3578 | ahci_pread(ap, AHCI_PREG_TFD), AHCI_PFMT_TFD_STS |
| 3579 | ); |
| 3580 | |
| 3581 | |
| 3582 | /* |
| 3583 | * NOTE: Timeout will not be running if the command was polled. |
| 3584 | * If we got here at least one of these flags should be set. |
| 3585 | */ |
| 3586 | KKASSERT(xa->flags & (ATA_F_POLL | ATA_F_TIMEOUT_DESIRED | |
| 3587 | ATA_F_TIMEOUT_RUNNING)); |
| 3588 | xa->flags &= ~(ATA_F_TIMEOUT_RUNNING | ATA_F_TIMEOUT_EXPIRED); |
| 3589 | |
| 3590 | if (ccb->ccb_xa.state == ATA_S_PENDING) { |
| 3591 | TAILQ_REMOVE(&ap->ap_ccb_pending, ccb, ccb_entry); |
| 3592 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 3593 | ccb->ccb_done(ccb); |
| 3594 | xa->complete(xa); |
| 3595 | ahci_issue_pending_commands(ap, NULL); |
| 3596 | return; |
| 3597 | } |
| 3598 | if (ccb->ccb_xa.state != ATA_S_ONCHIP) { |
| 3599 | kprintf("%s: Unexpected state during timeout: %d\n", |
| 3600 | ATANAME(ap, at), ccb->ccb_xa.state); |
| 3601 | return; |
| 3602 | } |
| 3603 | |
| 3604 | /* |
| 3605 | * Ok, we can only get this command off the chip if CR is inactive |
| 3606 | * or if the only commands running on the chip are all expired. |
| 3607 | * Otherwise we have to wait until the port is in a safe state. |
| 3608 | * |
| 3609 | * Do not set state here, it will cause polls to return when the |
| 3610 | * ccb is not yet off the chip. |
| 3611 | */ |
| 3612 | ap->ap_expired |= 1 << ccb->ccb_slot; |
| 3613 | |
| 3614 | if ((ahci_pread(ap, AHCI_PREG_CMD) & AHCI_PREG_CMD_CR) && |
| 3615 | (ap->ap_active | ap->ap_sactive) != ap->ap_expired) { |
| 3616 | /* |
| 3617 | * If using FBSS or NCQ we can't safely stop the port |
| 3618 | * right now. |
| 3619 | */ |
| 3620 | kprintf("%s: Deferred timeout until its safe, slot %d\n", |
| 3621 | ATANAME(ap, at), ccb->ccb_slot); |
| 3622 | return; |
| 3623 | } |
| 3624 | |
| 3625 | /* |
| 3626 | * We can safely stop the port and process all expired ccb's, |
| 3627 | * which will include our current ccb. |
| 3628 | */ |
| 3629 | ci_saved = (ap->ap_sactive) ? ahci_pread(ap, AHCI_PREG_SACT) : |
| 3630 | ahci_pread(ap, AHCI_PREG_CI); |
| 3631 | ahci_port_stop(ap, 0); |
| 3632 | |
| 3633 | while (ap->ap_expired) { |
| 3634 | slot = ffs(ap->ap_expired) - 1; |
| 3635 | ap->ap_expired &= ~(1 << slot); |
| 3636 | ci_saved &= ~(1 << slot); |
| 3637 | ccb = &ap->ap_ccbs[slot]; |
| 3638 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 3639 | if (ccb->ccb_xa.flags & ATA_F_NCQ) { |
| 3640 | KKASSERT(ap->ap_sactive & (1 << slot)); |
| 3641 | ap->ap_sactive &= ~(1 << slot); |
| 3642 | } else { |
| 3643 | KKASSERT(ap->ap_active & (1 << slot)); |
| 3644 | ap->ap_active &= ~(1 << slot); |
| 3645 | --ap->ap_active_cnt; |
| 3646 | } |
| 3647 | ccb->ccb_done(ccb); |
| 3648 | ccb->ccb_xa.complete(&ccb->ccb_xa); |
| 3649 | } |
| 3650 | /* ccb invalid now */ |
| 3651 | |
| 3652 | /* |
| 3653 | * We can safely CLO the port to clear any BSY/DRQ, a case which |
| 3654 | * can occur with port multipliers. This will unbrick the port |
| 3655 | * and allow commands to other targets behind the PM continue. |
| 3656 | * (FBSS). |
| 3657 | * |
| 3658 | * Finally, once the port has been restarted we can issue any |
| 3659 | * previously saved pending commands, and run the port interrupt |
| 3660 | * code to handle any completions which may have occured when |
| 3661 | * we saved CI. |
| 3662 | */ |
| 3663 | if (ahci_pread(ap, AHCI_PREG_TFD) & |
| 3664 | (AHCI_PREG_TFD_STS_BSY | AHCI_PREG_TFD_STS_DRQ)) { |
| 3665 | kprintf("%s: Warning, issuing CLO after timeout\n", |
| 3666 | ATANAME(ap, at)); |
| 3667 | ahci_port_clo(ap); |
| 3668 | } |
| 3669 | ahci_port_start(ap); |
| 3670 | |
| 3671 | /* |
| 3672 | * We absolutely must make sure the chipset cleared activity on |
| 3673 | * all slots. This sometimes might not happen due to races with |
| 3674 | * a chipset interrupt which stops the port before we can manage |
| 3675 | * to. For some reason some chipsets don't clear the active |
| 3676 | * commands when we turn off CMD_ST after the chip has stopped |
| 3677 | * operations itself. |
| 3678 | */ |
| 3679 | if (ahci_pactive(ap) != 0) { |
| 3680 | ahci_port_stop(ap, 0); |
| 3681 | ahci_port_start(ap); |
| 3682 | if ((mask = ahci_pactive(ap)) != 0) { |
| 3683 | kprintf("%s: quick-timeout: chipset failed " |
| 3684 | "to clear active cmds %08x\n", |
| 3685 | PORTNAME(ap), mask); |
| 3686 | } |
| 3687 | } |
| 3688 | ahci_issue_saved_commands(ap, ci_saved & ~ap->ap_expired); |
| 3689 | ahci_issue_pending_commands(ap, NULL); |
| 3690 | ahci_port_intr(ap, 0); |
| 3691 | } |
| 3692 | |
| 3693 | /* |
| 3694 | * Issue a previously saved set of commands |
| 3695 | */ |
| 3696 | void |
| 3697 | ahci_issue_saved_commands(struct ahci_port *ap, u_int32_t ci_saved) |
| 3698 | { |
| 3699 | if (ci_saved) { |
| 3700 | KKASSERT(!((ap->ap_active & ci_saved) && |
| 3701 | (ap->ap_sactive & ci_saved))); |
| 3702 | KKASSERT((ci_saved & ap->ap_expired) == 0); |
| 3703 | if (ap->ap_sactive & ci_saved) |
| 3704 | ahci_pwrite(ap, AHCI_PREG_SACT, ci_saved); |
| 3705 | ahci_pwrite(ap, AHCI_PREG_CI, ci_saved); |
| 3706 | } |
| 3707 | } |
| 3708 | |
| 3709 | /* |
| 3710 | * Used by the softreset, pmprobe, and read_ncq_error only, in very |
| 3711 | * specialized, controlled circumstances. |
| 3712 | * |
| 3713 | * Only one command may be pending. |
| 3714 | */ |
| 3715 | void |
| 3716 | ahci_quick_timeout(struct ahci_ccb *ccb) |
| 3717 | { |
| 3718 | struct ahci_port *ap = ccb->ccb_port; |
| 3719 | u_int32_t mask; |
| 3720 | |
| 3721 | switch (ccb->ccb_xa.state) { |
| 3722 | case ATA_S_PENDING: |
| 3723 | TAILQ_REMOVE(&ap->ap_ccb_pending, ccb, ccb_entry); |
| 3724 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 3725 | break; |
| 3726 | case ATA_S_ONCHIP: |
| 3727 | /* |
| 3728 | * We have to clear the command on-chip. |
| 3729 | */ |
| 3730 | KKASSERT(ap->ap_active == (1 << ccb->ccb_slot) && |
| 3731 | ap->ap_sactive == 0); |
| 3732 | ahci_port_stop(ap, 0); |
| 3733 | ahci_port_start(ap); |
| 3734 | if (ahci_pactive(ap) != 0) { |
| 3735 | ahci_port_stop(ap, 0); |
| 3736 | ahci_port_start(ap); |
| 3737 | if ((mask = ahci_pactive(ap)) != 0) { |
| 3738 | kprintf("%s: quick-timeout: chipset failed " |
| 3739 | "to clear active cmds %08x\n", |
| 3740 | PORTNAME(ap), mask); |
| 3741 | } |
| 3742 | } |
| 3743 | |
| 3744 | ccb->ccb_xa.state = ATA_S_TIMEOUT; |
| 3745 | ap->ap_active &= ~(1 << ccb->ccb_slot); |
| 3746 | KKASSERT(ap->ap_active_cnt > 0); |
| 3747 | --ap->ap_active_cnt; |
| 3748 | break; |
| 3749 | default: |
| 3750 | panic("%s: ahci_quick_timeout: ccb in bad state %d", |
| 3751 | ATANAME(ap, ccb->ccb_xa.at), ccb->ccb_xa.state); |
| 3752 | } |
| 3753 | } |
| 3754 | |
| 3755 | static void |
| 3756 | ahci_dummy_done(struct ata_xfer *xa) |
| 3757 | { |
| 3758 | } |
| 3759 | |
| 3760 | static void |
| 3761 | ahci_empty_done(struct ahci_ccb *ccb) |
| 3762 | { |
| 3763 | } |
| 3764 | |
| 3765 | int |
| 3766 | ahci_set_feature(struct ahci_port *ap, struct ata_port *atx, |
| 3767 | int feature, int enable) |
| 3768 | { |
| 3769 | struct ata_port *at; |
| 3770 | struct ata_xfer *xa; |
| 3771 | int error; |
| 3772 | |
| 3773 | at = atx ? atx : ap->ap_ata[0]; |
| 3774 | |
| 3775 | xa = ahci_ata_get_xfer(ap, atx); |
| 3776 | |
| 3777 | xa->fis->type = ATA_FIS_TYPE_H2D; |
| 3778 | xa->fis->flags = ATA_H2D_FLAGS_CMD | at->at_target; |
| 3779 | xa->fis->command = ATA_C_SET_FEATURES; |
| 3780 | xa->fis->features = enable ? ATA_C_SATA_FEATURE_ENA : |
| 3781 | ATA_C_SATA_FEATURE_DIS; |
| 3782 | xa->fis->sector_count = feature; |
| 3783 | xa->fis->control = ATA_FIS_CONTROL_4BIT; |
| 3784 | |
| 3785 | xa->complete = ahci_dummy_done; |
| 3786 | xa->datalen = 0; |
| 3787 | xa->flags = ATA_F_POLL; |
| 3788 | xa->timeout = 1000; |
| 3789 | |
| 3790 | if (ahci_ata_cmd(xa) == ATA_S_COMPLETE) |
| 3791 | error = 0; |
| 3792 | else |
| 3793 | error = EIO; |
| 3794 | ahci_ata_put_xfer(xa); |
| 3795 | return(error); |
| 3796 | } |