1/*- 2 * Copyright 2013 Nathan Whitehorn 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/11/sys/powerpc/pseries/phyp_vscsi.c 315812 2017-03-23 06:40:20Z mav $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kernel.h> 33#include <sys/malloc.h> 34#include <sys/module.h> 35#include <sys/selinfo.h> 36#include <sys/bus.h> 37#include <sys/conf.h> 38#include <sys/eventhandler.h> 39#include <sys/rman.h> 40#include <sys/bus_dma.h> 41#include <sys/bio.h> 42#include <sys/ioccom.h> 43#include <sys/uio.h> 44#include <sys/proc.h> 45#include <sys/signalvar.h> 46#include <sys/sysctl.h> 47#include <sys/endian.h> 48#include <sys/vmem.h> 49 50#include <cam/cam.h> 51#include <cam/cam_ccb.h> 52#include <cam/cam_debug.h> 53#include <cam/cam_periph.h> 54#include <cam/cam_sim.h> 55#include <cam/cam_xpt_periph.h> 56#include <cam/cam_xpt_sim.h> 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_message.h> 59 60#include <dev/ofw/openfirm.h> 61#include <dev/ofw/ofw_bus.h> 62#include <dev/ofw/ofw_bus_subr.h> 63 64#include <machine/bus.h> 65#include <machine/resource.h> 66 67#include <powerpc/pseries/phyp-hvcall.h> 68 69struct vscsi_softc; 70 71/* VSCSI CRQ format from table 260 of PAPR spec 2.4 (page 760) */ 72struct vscsi_crq { 73 uint8_t valid; 74 uint8_t format; 75 uint8_t reserved; 76 uint8_t status; 77 uint16_t timeout; 78 uint16_t iu_length; 79 uint64_t iu_data; 80}; 81 82struct vscsi_xfer { 83 TAILQ_ENTRY(vscsi_xfer) queue; 84 struct vscsi_softc *sc; 85 union ccb *ccb; 86 bus_dmamap_t dmamap; 87 uint64_t tag; 88 89 vmem_addr_t srp_iu_offset; 90 vmem_size_t srp_iu_size; 91}; 92 93TAILQ_HEAD(vscsi_xferq, vscsi_xfer); 94 95struct vscsi_softc { 96 device_t dev; 97 struct cam_devq *devq; 98 struct cam_sim *sim; 99 struct cam_path *path; 100 struct mtx io_lock; 101 102 cell_t unit; 103 int bus_initialized; 104 int bus_logged_in; 105 int max_transactions; 106 107 int irqid; 108 struct resource *irq; 109 void *irq_cookie; 110 111 bus_dma_tag_t crq_tag; 112 struct vscsi_crq *crq_queue; 113 int n_crqs, cur_crq; 114 bus_dmamap_t crq_map; 115 bus_addr_t crq_phys; 116 117 vmem_t *srp_iu_arena; 118 void *srp_iu_queue; 119 bus_addr_t srp_iu_phys; 120 121 bus_dma_tag_t data_tag; 122 123 struct vscsi_xfer loginxp; 124 struct vscsi_xfer *xfer; 125 struct vscsi_xferq active_xferq; 126 struct vscsi_xferq free_xferq; 127}; 128 129struct srp_login { 130 uint8_t type; 131 uint8_t reserved[7]; 132 uint64_t tag; 133 uint64_t max_cmd_length; 134 uint32_t reserved2; 135 uint16_t buffer_formats; 136 uint8_t flags; 137 uint8_t reserved3[5]; 138 uint8_t initiator_port_id[16]; 139 uint8_t target_port_id[16]; 140} __packed; 141 142struct srp_login_rsp { 143 uint8_t type; 144 uint8_t reserved[3]; 145 uint32_t request_limit_delta; 146 uint8_t tag; 147 uint32_t max_i_to_t_len; 148 uint32_t max_t_to_i_len; 149 uint16_t buffer_formats; 150 uint8_t flags; 151 /* Some reserved bits follow */ 152} __packed; 153 154struct srp_cmd { 155 uint8_t type; 156 uint8_t flags1; 157 uint8_t reserved[3]; 158 uint8_t formats; 159 uint8_t out_buffer_count; 160 uint8_t in_buffer_count; 161 uint64_t tag; 162 uint32_t reserved2; 163 uint64_t lun; 164 uint8_t reserved3[3]; 165 uint8_t additional_cdb; 166 uint8_t cdb[16]; 167 uint8_t data_payload[0]; 168} __packed; 169 170struct srp_rsp { 171 uint8_t type; 172 uint8_t reserved[3]; 173 uint32_t request_limit_delta; 174 uint64_t tag; 175 uint16_t reserved2; 176 uint8_t flags; 177 uint8_t status; 178 uint32_t data_out_resid; 179 uint32_t data_in_resid; 180 uint32_t sense_data_len; 181 uint32_t response_data_len; 182 uint8_t data_payload[0]; 183} __packed; 184 185struct srp_tsk_mgmt { 186 uint8_t type; 187 uint8_t reserved[7]; 188 uint64_t tag; 189 uint32_t reserved2; 190 uint64_t lun; 191 uint8_t reserved3[2]; 192 uint8_t function; 193 uint8_t reserved4; 194 uint64_t manage_tag; 195 uint64_t reserved5; 196} __packed; 197 198/* Message code type */ 199#define SRP_LOGIN_REQ 0x00 200#define SRP_TSK_MGMT 0x01 201#define SRP_CMD 0x02 202#define SRP_I_LOGOUT 0x03 203 204#define SRP_LOGIN_RSP 0xC0 205#define SRP_RSP 0xC1 206#define SRP_LOGIN_REJ 0xC2 207 208#define SRP_T_LOGOUT 0x80 209#define SRP_CRED_REQ 0x81 210#define SRP_AER_REQ 0x82 211 212#define SRP_CRED_RSP 0x41 213#define SRP_AER_RSP 0x41 214 215/* Flags for srp_rsp flags field */ 216#define SRP_RSPVALID 0x01 217#define SRP_SNSVALID 0x02 218#define SRP_DOOVER 0x04 219#define SRP_DOUNDER 0x08 220#define SRP_DIOVER 0x10 221#define SRP_DIUNDER 0x20 222 223#define MAD_SUCESS 0x00 224#define MAD_NOT_SUPPORTED 0xf1 225#define MAD_FAILED 0xf7 226 227#define MAD_EMPTY_IU 0x01 228#define MAD_ERROR_LOGGING_REQUEST 0x02 229#define MAD_ADAPTER_INFO_REQUEST 0x03 230#define MAD_CAPABILITIES_EXCHANGE 0x05 231#define MAD_PHYS_ADAP_INFO_REQUEST 0x06 232#define MAD_TAPE_PASSTHROUGH_REQUEST 0x07 233#define MAD_ENABLE_FAST_FAIL 0x08 234 235static int vscsi_probe(device_t); 236static int vscsi_attach(device_t); 237static int vscsi_detach(device_t); 238static void vscsi_cam_action(struct cam_sim *, union ccb *); 239static void vscsi_cam_poll(struct cam_sim *); 240static void vscsi_intr(void *arg); 241static void vscsi_check_response_queue(struct vscsi_softc *sc); 242static void vscsi_setup_bus(struct vscsi_softc *sc); 243 244static void vscsi_srp_login(struct vscsi_softc *sc); 245static void vscsi_crq_load_cb(void *, bus_dma_segment_t *, int, int); 246static void vscsi_scsi_command(void *xxp, bus_dma_segment_t *segs, 247 int nsegs, int err); 248static void vscsi_task_management(struct vscsi_softc *sc, union ccb *ccb); 249static void vscsi_srp_response(struct vscsi_xfer *, struct vscsi_crq *); 250 251static devclass_t vscsi_devclass; 252static device_method_t vscsi_methods[] = { 253 DEVMETHOD(device_probe, vscsi_probe), 254 DEVMETHOD(device_attach, vscsi_attach), 255 DEVMETHOD(device_detach, vscsi_detach), 256 257 DEVMETHOD_END 258}; 259static driver_t vscsi_driver = { 260 "vscsi", 261 vscsi_methods, 262 sizeof(struct vscsi_softc) 263}; 264DRIVER_MODULE(vscsi, vdevice, vscsi_driver, vscsi_devclass, 0, 0); 265MALLOC_DEFINE(M_VSCSI, "vscsi", "CAM device queue for VSCSI"); 266 267static int 268vscsi_probe(device_t dev) 269{ 270 271 if (!ofw_bus_is_compatible(dev, "IBM,v-scsi")) 272 return (ENXIO); 273 274 device_set_desc(dev, "POWER Hypervisor Virtual SCSI Bus"); 275 return (0); 276} 277 278static int 279vscsi_attach(device_t dev) 280{ 281 struct vscsi_softc *sc; 282 struct vscsi_xfer *xp; 283 int error, i; 284 285 sc = device_get_softc(dev); 286 if (sc == NULL) 287 return (EINVAL); 288 289 sc->dev = dev; 290 mtx_init(&sc->io_lock, "vscsi", NULL, MTX_DEF); 291 292 /* Get properties */ 293 OF_getencprop(ofw_bus_get_node(dev), "reg", &sc->unit, 294 sizeof(sc->unit)); 295 296 /* Setup interrupt */ 297 sc->irqid = 0; 298 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqid, 299 RF_ACTIVE); 300 301 if (!sc->irq) { 302 device_printf(dev, "Could not allocate IRQ\n"); 303 mtx_destroy(&sc->io_lock); 304 return (ENXIO); 305 } 306 307 bus_setup_intr(dev, sc->irq, INTR_TYPE_CAM | INTR_MPSAFE | 308 INTR_ENTROPY, NULL, vscsi_intr, sc, &sc->irq_cookie); 309 310 /* Data DMA */ 311 error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0, 312 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE, 313 256, BUS_SPACE_MAXSIZE_32BIT, 0, busdma_lock_mutex, &sc->io_lock, 314 &sc->data_tag); 315 316 TAILQ_INIT(&sc->active_xferq); 317 TAILQ_INIT(&sc->free_xferq); 318 319 /* First XFER for login data */ 320 sc->loginxp.sc = sc; 321 bus_dmamap_create(sc->data_tag, 0, &sc->loginxp.dmamap); 322 TAILQ_INSERT_TAIL(&sc->free_xferq, &sc->loginxp, queue); 323 324 /* CRQ area */ 325 error = bus_dma_tag_create(bus_get_dma_tag(dev), PAGE_SIZE, 0, 326 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 8*PAGE_SIZE, 327 1, BUS_SPACE_MAXSIZE, 0, NULL, NULL, &sc->crq_tag); 328 error = bus_dmamem_alloc(sc->crq_tag, (void **)&sc->crq_queue, 329 BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->crq_map); 330 sc->crq_phys = 0; 331 sc->n_crqs = 0; 332 error = bus_dmamap_load(sc->crq_tag, sc->crq_map, sc->crq_queue, 333 8*PAGE_SIZE, vscsi_crq_load_cb, sc, 0); 334 335 mtx_lock(&sc->io_lock); 336 vscsi_setup_bus(sc); 337 sc->xfer = malloc(sizeof(sc->xfer[0])*sc->max_transactions, M_VSCSI, 338 M_NOWAIT); 339 for (i = 0; i < sc->max_transactions; i++) { 340 xp = &sc->xfer[i]; 341 xp->sc = sc; 342 343 error = bus_dmamap_create(sc->data_tag, 0, &xp->dmamap); 344 if (error) { 345 device_printf(dev, "Could not create DMA map (%d)\n", 346 error); 347 break; 348 } 349 350 TAILQ_INSERT_TAIL(&sc->free_xferq, xp, queue); 351 } 352 mtx_unlock(&sc->io_lock); 353 354 /* Allocate CAM bits */ 355 if ((sc->devq = cam_simq_alloc(sc->max_transactions)) == NULL) 356 return (ENOMEM); 357 358 sc->sim = cam_sim_alloc(vscsi_cam_action, vscsi_cam_poll, "vscsi", sc, 359 device_get_unit(dev), &sc->io_lock, 360 sc->max_transactions, sc->max_transactions, 361 sc->devq); 362 if (sc->sim == NULL) { 363 cam_simq_free(sc->devq); 364 sc->devq = NULL; 365 device_printf(dev, "CAM SIM attach failed\n"); 366 return (EINVAL); 367 } 368 369 370 mtx_lock(&sc->io_lock); 371 if (xpt_bus_register(sc->sim, dev, 0) != 0) { 372 device_printf(dev, "XPT bus registration failed\n"); 373 cam_sim_free(sc->sim, FALSE); 374 sc->sim = NULL; 375 cam_simq_free(sc->devq); 376 sc->devq = NULL; 377 mtx_unlock(&sc->io_lock); 378 return (EINVAL); 379 } 380 mtx_unlock(&sc->io_lock); 381 382 return (0); 383} 384 385static int 386vscsi_detach(device_t dev) 387{ 388 struct vscsi_softc *sc; 389 390 sc = device_get_softc(dev); 391 if (sc == NULL) 392 return (EINVAL); 393 394 if (sc->sim != NULL) { 395 mtx_lock(&sc->io_lock); 396 xpt_bus_deregister(cam_sim_path(sc->sim)); 397 cam_sim_free(sc->sim, FALSE); 398 sc->sim = NULL; 399 mtx_unlock(&sc->io_lock); 400 } 401 402 if (sc->devq != NULL) { 403 cam_simq_free(sc->devq); 404 sc->devq = NULL; 405 } 406 407 mtx_destroy(&sc->io_lock); 408 409 return (0); 410} 411 412static void 413vscsi_cam_action(struct cam_sim *sim, union ccb *ccb) 414{ 415 struct vscsi_softc *sc = cam_sim_softc(sim); 416 417 mtx_assert(&sc->io_lock, MA_OWNED); 418 419 switch (ccb->ccb_h.func_code) { 420 case XPT_PATH_INQ: 421 { 422 struct ccb_pathinq *cpi = &ccb->cpi; 423 424 cpi->version_num = 1; 425 cpi->hba_inquiry = PI_TAG_ABLE; 426 cpi->hba_misc = PIM_EXTLUNS; 427 cpi->target_sprt = 0; 428 cpi->hba_eng_cnt = 0; 429 cpi->max_target = 0; 430 cpi->max_lun = 0; 431 cpi->initiator_id = ~0; 432 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 433 strlcpy(cpi->hba_vid, "IBM", HBA_IDLEN); 434 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 435 cpi->unit_number = cam_sim_unit(sim); 436 cpi->bus_id = cam_sim_bus(sim); 437 cpi->base_transfer_speed = 150000; 438 cpi->transport = XPORT_SRP; 439 cpi->transport_version = 0; 440 cpi->protocol = PROTO_SCSI; 441 cpi->protocol_version = SCSI_REV_SPC4; 442 cpi->ccb_h.status = CAM_REQ_CMP; 443 break; 444 } 445 case XPT_RESET_BUS: 446 ccb->ccb_h.status = CAM_REQ_CMP; 447 break; 448 case XPT_RESET_DEV: 449 ccb->ccb_h.status = CAM_REQ_INPROG; 450 vscsi_task_management(sc, ccb); 451 return; 452 case XPT_GET_TRAN_SETTINGS: 453 ccb->cts.protocol = PROTO_SCSI; 454 ccb->cts.protocol_version = SCSI_REV_SPC4; 455 ccb->cts.transport = XPORT_SRP; 456 ccb->cts.transport_version = 0; 457 ccb->cts.proto_specific.valid = 0; 458 ccb->cts.xport_specific.valid = 0; 459 ccb->ccb_h.status = CAM_REQ_CMP; 460 break; 461 case XPT_SET_TRAN_SETTINGS: 462 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 463 break; 464 case XPT_SCSI_IO: 465 { 466 struct vscsi_xfer *xp; 467 468 ccb->ccb_h.status = CAM_REQ_INPROG; 469 470 xp = TAILQ_FIRST(&sc->free_xferq); 471 if (xp == NULL) 472 panic("SCSI queue flooded"); 473 xp->ccb = ccb; 474 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 475 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 476 bus_dmamap_load_ccb(sc->data_tag, xp->dmamap, 477 ccb, vscsi_scsi_command, xp, 0); 478 479 return; 480 } 481 default: 482 ccb->ccb_h.status = CAM_REQ_INVALID; 483 break; 484 } 485 486 xpt_done(ccb); 487 return; 488} 489 490static void 491vscsi_srp_login(struct vscsi_softc *sc) 492{ 493 struct vscsi_xfer *xp; 494 struct srp_login *login; 495 struct vscsi_crq crq; 496 int err; 497 498 mtx_assert(&sc->io_lock, MA_OWNED); 499 500 xp = TAILQ_FIRST(&sc->free_xferq); 501 if (xp == NULL) 502 panic("SCSI queue flooded"); 503 xp->ccb = NULL; 504 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 505 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 506 507 /* Set up command */ 508 xp->srp_iu_size = crq.iu_length = 64; 509 err = vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 510 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 511 if (err) 512 panic("Error during VMEM allocation (%d)", err); 513 514 login = (struct srp_login *)((uint8_t *)xp->sc->srp_iu_queue + 515 (uintptr_t)xp->srp_iu_offset); 516 bzero(login, xp->srp_iu_size); 517 login->type = SRP_LOGIN_REQ; 518 login->tag = (uint64_t)(xp); 519 login->max_cmd_length = htobe64(256); 520 login->buffer_formats = htobe16(0x1 | 0x2); /* Direct and indirect */ 521 login->flags = 0; 522 523 /* Create CRQ entry */ 524 crq.valid = 0x80; 525 crq.format = 0x01; 526 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 527 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 528 529 err = phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 530 ((uint64_t *)(&crq))[1]); 531 if (err != 0) 532 panic("CRQ send failure (%d)", err); 533} 534 535static void 536vscsi_task_management(struct vscsi_softc *sc, union ccb *ccb) 537{ 538 struct srp_tsk_mgmt *cmd; 539 struct vscsi_xfer *xp; 540 struct vscsi_crq crq; 541 int err; 542 543 mtx_assert(&sc->io_lock, MA_OWNED); 544 545 xp = TAILQ_FIRST(&sc->free_xferq); 546 if (xp == NULL) 547 panic("SCSI queue flooded"); 548 xp->ccb = ccb; 549 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 550 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 551 552 xp->srp_iu_size = crq.iu_length = sizeof(*cmd); 553 err = vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 554 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 555 if (err) 556 panic("Error during VMEM allocation (%d)", err); 557 558 cmd = (struct srp_tsk_mgmt *)((uint8_t *)xp->sc->srp_iu_queue + 559 (uintptr_t)xp->srp_iu_offset); 560 bzero(cmd, xp->srp_iu_size); 561 cmd->type = SRP_TSK_MGMT; 562 cmd->tag = (uint64_t)xp; 563 cmd->lun = htobe64(CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun)); 564 565 switch (ccb->ccb_h.func_code) { 566 case XPT_RESET_DEV: 567 cmd->function = 0x08; 568 break; 569 default: 570 panic("Unimplemented code %d", ccb->ccb_h.func_code); 571 break; 572 } 573 574 bus_dmamap_sync(xp->sc->crq_tag, xp->sc->crq_map, BUS_DMASYNC_PREWRITE); 575 576 /* Create CRQ entry */ 577 crq.valid = 0x80; 578 crq.format = 0x01; 579 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 580 581 err = phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 582 ((uint64_t *)(&crq))[1]); 583 if (err != 0) 584 panic("CRQ send failure (%d)", err); 585} 586 587static void 588vscsi_scsi_command(void *xxp, bus_dma_segment_t *segs, int nsegs, int err) 589{ 590 struct vscsi_xfer *xp = xxp; 591 uint8_t *cdb; 592 union ccb *ccb = xp->ccb; 593 struct srp_cmd *cmd; 594 uint64_t chunk_addr; 595 uint32_t chunk_size; 596 int desc_start, i; 597 struct vscsi_crq crq; 598 599 KASSERT(err == 0, ("DMA error %d\n", err)); 600 601 mtx_assert(&xp->sc->io_lock, MA_OWNED); 602 603 cdb = (ccb->ccb_h.flags & CAM_CDB_POINTER) ? 604 ccb->csio.cdb_io.cdb_ptr : ccb->csio.cdb_io.cdb_bytes; 605 606 /* Command format from Table 20, page 37 of SRP spec */ 607 crq.iu_length = 48 + ((nsegs > 1) ? 20 : 16) + 608 ((ccb->csio.cdb_len > 16) ? (ccb->csio.cdb_len - 16) : 0); 609 xp->srp_iu_size = crq.iu_length; 610 if (nsegs > 1) 611 xp->srp_iu_size += nsegs*16; 612 xp->srp_iu_size = roundup(xp->srp_iu_size, 16); 613 err = vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 614 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 615 if (err) 616 panic("Error during VMEM allocation (%d)", err); 617 618 cmd = (struct srp_cmd *)((uint8_t *)xp->sc->srp_iu_queue + 619 (uintptr_t)xp->srp_iu_offset); 620 bzero(cmd, xp->srp_iu_size); 621 cmd->type = SRP_CMD; 622 if (ccb->csio.cdb_len > 16) 623 cmd->additional_cdb = (ccb->csio.cdb_len - 16) << 2; 624 memcpy(cmd->cdb, cdb, ccb->csio.cdb_len); 625 626 cmd->tag = (uint64_t)(xp); /* Let the responder find this again */ 627 cmd->lun = htobe64(CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun)); 628 629 if (nsegs > 1) { 630 /* Use indirect descriptors */ 631 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 632 case CAM_DIR_OUT: 633 cmd->formats = (2 << 4); 634 break; 635 case CAM_DIR_IN: 636 cmd->formats = 2; 637 break; 638 default: 639 panic("Does not support bidirectional commands (%d)", 640 ccb->ccb_h.flags & CAM_DIR_MASK); 641 break; 642 } 643 644 desc_start = ((ccb->csio.cdb_len > 16) ? 645 ccb->csio.cdb_len - 16 : 0); 646 chunk_addr = xp->sc->srp_iu_phys + xp->srp_iu_offset + 20 + 647 desc_start + sizeof(*cmd); 648 chunk_size = 16*nsegs; 649 memcpy(&cmd->data_payload[desc_start], &chunk_addr, 8); 650 memcpy(&cmd->data_payload[desc_start+12], &chunk_size, 4); 651 chunk_size = 0; 652 for (i = 0; i < nsegs; i++) 653 chunk_size += segs[i].ds_len; 654 memcpy(&cmd->data_payload[desc_start+16], &chunk_size, 4); 655 desc_start += 20; 656 for (i = 0; i < nsegs; i++) { 657 chunk_addr = segs[i].ds_addr; 658 chunk_size = segs[i].ds_len; 659 660 memcpy(&cmd->data_payload[desc_start + 16*i], 661 &chunk_addr, 8); 662 /* Set handle tag to 0 */ 663 memcpy(&cmd->data_payload[desc_start + 16*i + 12], 664 &chunk_size, 4); 665 } 666 } else if (nsegs == 1) { 667 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 668 case CAM_DIR_OUT: 669 cmd->formats = (1 << 4); 670 break; 671 case CAM_DIR_IN: 672 cmd->formats = 1; 673 break; 674 default: 675 panic("Does not support bidirectional commands (%d)", 676 ccb->ccb_h.flags & CAM_DIR_MASK); 677 break; 678 } 679 680 /* 681 * Memory descriptor: 682 * 8 byte address 683 * 4 byte handle 684 * 4 byte length 685 */ 686 687 chunk_addr = segs[0].ds_addr; 688 chunk_size = segs[0].ds_len; 689 desc_start = ((ccb->csio.cdb_len > 16) ? 690 ccb->csio.cdb_len - 16 : 0); 691 692 memcpy(&cmd->data_payload[desc_start], &chunk_addr, 8); 693 /* Set handle tag to 0 */ 694 memcpy(&cmd->data_payload[desc_start+12], &chunk_size, 4); 695 KASSERT(xp->srp_iu_size >= 48 + ((ccb->csio.cdb_len > 16) ? 696 ccb->csio.cdb_len : 16), ("SRP IU command length")); 697 } else { 698 cmd->formats = 0; 699 } 700 bus_dmamap_sync(xp->sc->crq_tag, xp->sc->crq_map, BUS_DMASYNC_PREWRITE); 701 702 /* Create CRQ entry */ 703 crq.valid = 0x80; 704 crq.format = 0x01; 705 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 706 707 err = phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 708 ((uint64_t *)(&crq))[1]); 709 if (err != 0) 710 panic("CRQ send failure (%d)", err); 711} 712 713static void 714vscsi_crq_load_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int err) 715{ 716 struct vscsi_softc *sc = xsc; 717 718 sc->crq_phys = segs[0].ds_addr; 719 sc->n_crqs = PAGE_SIZE/sizeof(struct vscsi_crq); 720 721 sc->srp_iu_queue = (uint8_t *)(sc->crq_queue); 722 sc->srp_iu_phys = segs[0].ds_addr; 723 sc->srp_iu_arena = vmem_create("VSCSI SRP IU", PAGE_SIZE, 724 segs[0].ds_len - PAGE_SIZE, 16, 0, M_BESTFIT | M_NOWAIT); 725} 726 727static void 728vscsi_setup_bus(struct vscsi_softc *sc) 729{ 730 struct vscsi_crq crq; 731 struct vscsi_xfer *xp; 732 int error; 733 734 struct { 735 uint32_t type; 736 uint16_t status; 737 uint16_t length; 738 uint64_t tag; 739 uint64_t buffer; 740 struct { 741 char srp_version[8]; 742 char partition_name[96]; 743 uint32_t partition_number; 744 uint32_t mad_version; 745 uint32_t os_type; 746 uint32_t port_max_txu[8]; 747 } payload; 748 } mad_adapter_info; 749 750 bzero(&crq, sizeof(crq)); 751 752 /* Init message */ 753 crq.valid = 0xc0; 754 crq.format = 0x01; 755 756 do { 757 error = phyp_hcall(H_FREE_CRQ, sc->unit); 758 } while (error == H_BUSY); 759 760 /* See initialization sequence page 757 */ 761 bzero(sc->crq_queue, sc->n_crqs*sizeof(sc->crq_queue[0])); 762 sc->cur_crq = 0; 763 sc->bus_initialized = 0; 764 sc->bus_logged_in = 0; 765 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 766 error = phyp_hcall(H_REG_CRQ, sc->unit, sc->crq_phys, 767 sc->n_crqs*sizeof(sc->crq_queue[0])); 768 KASSERT(error == 0, ("CRQ registration success")); 769 770 error = phyp_hcall(H_SEND_CRQ, sc->unit, ((uint64_t *)(&crq))[0], 771 ((uint64_t *)(&crq))[1]); 772 if (error != 0) 773 panic("CRQ setup failure (%d)", error); 774 775 while (sc->bus_initialized == 0) 776 vscsi_check_response_queue(sc); 777 778 /* Send MAD adapter info */ 779 mad_adapter_info.type = MAD_ADAPTER_INFO_REQUEST; 780 mad_adapter_info.status = 0; 781 mad_adapter_info.length = sizeof(mad_adapter_info.payload); 782 783 strcpy(mad_adapter_info.payload.srp_version, "16.a"); 784 strcpy(mad_adapter_info.payload.partition_name, "UNKNOWN"); 785 mad_adapter_info.payload.partition_number = -1; 786 mad_adapter_info.payload.mad_version = 1; 787 mad_adapter_info.payload.os_type = 2; /* Claim we are Linux */ 788 mad_adapter_info.payload.port_max_txu[0] = 0; 789 /* If this fails, we get the defaults above */ 790 OF_getprop(OF_finddevice("/"), "ibm,partition-name", 791 mad_adapter_info.payload.partition_name, 792 sizeof(mad_adapter_info.payload.partition_name)); 793 OF_getprop(OF_finddevice("/"), "ibm,partition-no", 794 &mad_adapter_info.payload.partition_number, 795 sizeof(mad_adapter_info.payload.partition_number)); 796 797 xp = TAILQ_FIRST(&sc->free_xferq); 798 xp->ccb = NULL; 799 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 800 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 801 xp->srp_iu_size = crq.iu_length = sizeof(mad_adapter_info); 802 vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 803 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 804 mad_adapter_info.buffer = xp->sc->srp_iu_phys + xp->srp_iu_offset + 24; 805 mad_adapter_info.tag = (uint64_t)xp; 806 memcpy((uint8_t *)xp->sc->srp_iu_queue + (uintptr_t)xp->srp_iu_offset, 807 &mad_adapter_info, sizeof(mad_adapter_info)); 808 crq.valid = 0x80; 809 crq.format = 0x02; 810 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 811 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 812 phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 813 ((uint64_t *)(&crq))[1]); 814 815 while (TAILQ_EMPTY(&sc->free_xferq)) 816 vscsi_check_response_queue(sc); 817 818 /* Send SRP login */ 819 vscsi_srp_login(sc); 820 while (sc->bus_logged_in == 0) 821 vscsi_check_response_queue(sc); 822 823 error = phyp_hcall(H_VIO_SIGNAL, sc->unit, 1); /* Enable interrupts */ 824} 825 826 827static void 828vscsi_intr(void *xsc) 829{ 830 struct vscsi_softc *sc = xsc; 831 832 mtx_lock(&sc->io_lock); 833 vscsi_check_response_queue(sc); 834 mtx_unlock(&sc->io_lock); 835} 836 837static void 838vscsi_srp_response(struct vscsi_xfer *xp, struct vscsi_crq *crq) 839{ 840 union ccb *ccb = xp->ccb; 841 struct vscsi_softc *sc = xp->sc; 842 struct srp_rsp *rsp; 843 uint32_t sense_len; 844 845 /* SRP response packet in original request */ 846 rsp = (struct srp_rsp *)((uint8_t *)sc->srp_iu_queue + 847 (uintptr_t)xp->srp_iu_offset); 848 ccb->csio.scsi_status = rsp->status; 849 if (ccb->csio.scsi_status == SCSI_STATUS_OK) 850 ccb->ccb_h.status = CAM_REQ_CMP; 851 else 852 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR; 853#ifdef NOTYET 854 /* Collect fast fail codes */ 855 if (crq->status != 0) 856 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 857#endif 858 859 if (ccb->ccb_h.status != CAM_REQ_CMP) { 860 ccb->ccb_h.status |= CAM_DEV_QFRZN; 861 xpt_freeze_devq(ccb->ccb_h.path, /*count*/ 1); 862 } 863 864 if (!(rsp->flags & SRP_RSPVALID)) 865 rsp->response_data_len = 0; 866 if (!(rsp->flags & SRP_SNSVALID)) 867 rsp->sense_data_len = 0; 868 if (!(rsp->flags & (SRP_DOOVER | SRP_DOUNDER))) 869 rsp->data_out_resid = 0; 870 if (!(rsp->flags & (SRP_DIOVER | SRP_DIUNDER))) 871 rsp->data_in_resid = 0; 872 873 if (rsp->flags & SRP_SNSVALID) { 874 bzero(&ccb->csio.sense_data, sizeof(struct scsi_sense_data)); 875 ccb->ccb_h.status |= CAM_AUTOSNS_VALID; 876 sense_len = min(be32toh(rsp->sense_data_len), 877 ccb->csio.sense_len); 878 memcpy(&ccb->csio.sense_data, 879 &rsp->data_payload[be32toh(rsp->response_data_len)], 880 sense_len); 881 ccb->csio.sense_resid = ccb->csio.sense_len - 882 be32toh(rsp->sense_data_len); 883 } 884 885 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 886 case CAM_DIR_OUT: 887 ccb->csio.resid = rsp->data_out_resid; 888 break; 889 case CAM_DIR_IN: 890 ccb->csio.resid = rsp->data_in_resid; 891 break; 892 } 893 894 bus_dmamap_sync(sc->data_tag, xp->dmamap, BUS_DMASYNC_POSTREAD); 895 bus_dmamap_unload(sc->data_tag, xp->dmamap); 896 xpt_done(ccb); 897 xp->ccb = NULL; 898} 899 900static void 901vscsi_login_response(struct vscsi_xfer *xp, struct vscsi_crq *crq) 902{ 903 struct vscsi_softc *sc = xp->sc; 904 struct srp_login_rsp *rsp; 905 906 /* SRP response packet in original request */ 907 rsp = (struct srp_login_rsp *)((uint8_t *)sc->srp_iu_queue + 908 (uintptr_t)xp->srp_iu_offset); 909 KASSERT(be16toh(rsp->buffer_formats) & 0x3, ("Both direct and indirect " 910 "buffers supported")); 911 912 sc->max_transactions = be32toh(rsp->request_limit_delta); 913 device_printf(sc->dev, "Queue depth %d commands\n", 914 sc->max_transactions); 915 sc->bus_logged_in = 1; 916} 917 918static void 919vscsi_cam_poll(struct cam_sim *sim) 920{ 921 struct vscsi_softc *sc = cam_sim_softc(sim); 922 923 vscsi_check_response_queue(sc); 924} 925 926static void 927vscsi_check_response_queue(struct vscsi_softc *sc) 928{ 929 struct vscsi_crq *crq; 930 struct vscsi_xfer *xp; 931 int code; 932 933 mtx_assert(&sc->io_lock, MA_OWNED); 934 935 while (sc->crq_queue[sc->cur_crq].valid != 0) { 936 /* The hypercalls at both ends of this are not optimal */ 937 phyp_hcall(H_VIO_SIGNAL, sc->unit, 0); 938 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_POSTREAD); 939 940 crq = &sc->crq_queue[sc->cur_crq]; 941 942 switch (crq->valid) { 943 case 0xc0: 944 if (crq->format == 0x02) 945 sc->bus_initialized = 1; 946 break; 947 case 0x80: 948 /* IU data is set to tag pointer (the XP) */ 949 xp = (struct vscsi_xfer *)crq->iu_data; 950 951 switch (crq->format) { 952 case 0x01: 953 code = *((uint8_t *)sc->srp_iu_queue + 954 (uintptr_t)xp->srp_iu_offset); 955 switch (code) { 956 case SRP_RSP: 957 vscsi_srp_response(xp, crq); 958 break; 959 case SRP_LOGIN_RSP: 960 vscsi_login_response(xp, crq); 961 break; 962 default: 963 device_printf(sc->dev, "Unknown SRP " 964 "response code %d\n", code); 965 break; 966 } 967 break; 968 case 0x02: 969 /* Ignore management datagrams */ 970 break; 971 default: 972 panic("Unknown CRQ format %d\n", crq->format); 973 break; 974 } 975 vmem_free(sc->srp_iu_arena, xp->srp_iu_offset, 976 xp->srp_iu_size); 977 TAILQ_REMOVE(&sc->active_xferq, xp, queue); 978 TAILQ_INSERT_TAIL(&sc->free_xferq, xp, queue); 979 break; 980 default: 981 device_printf(sc->dev, 982 "Unknown CRQ message type %d\n", crq->valid); 983 break; 984 } 985 986 crq->valid = 0; 987 sc->cur_crq = (sc->cur_crq + 1) % sc->n_crqs; 988 989 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 990 phyp_hcall(H_VIO_SIGNAL, sc->unit, 1); 991 } 992} 993 994