phyp_vscsi.c revision 330897
1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright 2013 Nathan Whitehorn 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/11/sys/powerpc/pseries/phyp_vscsi.c 330897 2018-03-14 03:19:51Z eadler $"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/malloc.h> 36#include <sys/module.h> 37#include <sys/selinfo.h> 38#include <sys/bus.h> 39#include <sys/conf.h> 40#include <sys/eventhandler.h> 41#include <sys/rman.h> 42#include <sys/bus_dma.h> 43#include <sys/bio.h> 44#include <sys/ioccom.h> 45#include <sys/uio.h> 46#include <sys/proc.h> 47#include <sys/signalvar.h> 48#include <sys/sysctl.h> 49#include <sys/endian.h> 50#include <sys/vmem.h> 51 52#include <cam/cam.h> 53#include <cam/cam_ccb.h> 54#include <cam/cam_debug.h> 55#include <cam/cam_periph.h> 56#include <cam/cam_sim.h> 57#include <cam/cam_xpt_periph.h> 58#include <cam/cam_xpt_sim.h> 59#include <cam/scsi/scsi_all.h> 60#include <cam/scsi/scsi_message.h> 61 62#include <dev/ofw/openfirm.h> 63#include <dev/ofw/ofw_bus.h> 64#include <dev/ofw/ofw_bus_subr.h> 65 66#include <machine/bus.h> 67#include <machine/resource.h> 68 69#include <powerpc/pseries/phyp-hvcall.h> 70 71struct vscsi_softc; 72 73/* VSCSI CRQ format from table 260 of PAPR spec 2.4 (page 760) */ 74struct vscsi_crq { 75 uint8_t valid; 76 uint8_t format; 77 uint8_t reserved; 78 uint8_t status; 79 uint16_t timeout; 80 uint16_t iu_length; 81 uint64_t iu_data; 82}; 83 84struct vscsi_xfer { 85 TAILQ_ENTRY(vscsi_xfer) queue; 86 struct vscsi_softc *sc; 87 union ccb *ccb; 88 bus_dmamap_t dmamap; 89 uint64_t tag; 90 91 vmem_addr_t srp_iu_offset; 92 vmem_size_t srp_iu_size; 93}; 94 95TAILQ_HEAD(vscsi_xferq, vscsi_xfer); 96 97struct vscsi_softc { 98 device_t dev; 99 struct cam_devq *devq; 100 struct cam_sim *sim; 101 struct cam_path *path; 102 struct mtx io_lock; 103 104 cell_t unit; 105 int bus_initialized; 106 int bus_logged_in; 107 int max_transactions; 108 109 int irqid; 110 struct resource *irq; 111 void *irq_cookie; 112 113 bus_dma_tag_t crq_tag; 114 struct vscsi_crq *crq_queue; 115 int n_crqs, cur_crq; 116 bus_dmamap_t crq_map; 117 bus_addr_t crq_phys; 118 119 vmem_t *srp_iu_arena; 120 void *srp_iu_queue; 121 bus_addr_t srp_iu_phys; 122 123 bus_dma_tag_t data_tag; 124 125 struct vscsi_xfer loginxp; 126 struct vscsi_xfer *xfer; 127 struct vscsi_xferq active_xferq; 128 struct vscsi_xferq free_xferq; 129}; 130 131struct srp_login { 132 uint8_t type; 133 uint8_t reserved[7]; 134 uint64_t tag; 135 uint64_t max_cmd_length; 136 uint32_t reserved2; 137 uint16_t buffer_formats; 138 uint8_t flags; 139 uint8_t reserved3[5]; 140 uint8_t initiator_port_id[16]; 141 uint8_t target_port_id[16]; 142} __packed; 143 144struct srp_login_rsp { 145 uint8_t type; 146 uint8_t reserved[3]; 147 uint32_t request_limit_delta; 148 uint8_t tag; 149 uint32_t max_i_to_t_len; 150 uint32_t max_t_to_i_len; 151 uint16_t buffer_formats; 152 uint8_t flags; 153 /* Some reserved bits follow */ 154} __packed; 155 156struct srp_cmd { 157 uint8_t type; 158 uint8_t flags1; 159 uint8_t reserved[3]; 160 uint8_t formats; 161 uint8_t out_buffer_count; 162 uint8_t in_buffer_count; 163 uint64_t tag; 164 uint32_t reserved2; 165 uint64_t lun; 166 uint8_t reserved3[3]; 167 uint8_t additional_cdb; 168 uint8_t cdb[16]; 169 uint8_t data_payload[0]; 170} __packed; 171 172struct srp_rsp { 173 uint8_t type; 174 uint8_t reserved[3]; 175 uint32_t request_limit_delta; 176 uint64_t tag; 177 uint16_t reserved2; 178 uint8_t flags; 179 uint8_t status; 180 uint32_t data_out_resid; 181 uint32_t data_in_resid; 182 uint32_t sense_data_len; 183 uint32_t response_data_len; 184 uint8_t data_payload[0]; 185} __packed; 186 187struct srp_tsk_mgmt { 188 uint8_t type; 189 uint8_t reserved[7]; 190 uint64_t tag; 191 uint32_t reserved2; 192 uint64_t lun; 193 uint8_t reserved3[2]; 194 uint8_t function; 195 uint8_t reserved4; 196 uint64_t manage_tag; 197 uint64_t reserved5; 198} __packed; 199 200/* Message code type */ 201#define SRP_LOGIN_REQ 0x00 202#define SRP_TSK_MGMT 0x01 203#define SRP_CMD 0x02 204#define SRP_I_LOGOUT 0x03 205 206#define SRP_LOGIN_RSP 0xC0 207#define SRP_RSP 0xC1 208#define SRP_LOGIN_REJ 0xC2 209 210#define SRP_T_LOGOUT 0x80 211#define SRP_CRED_REQ 0x81 212#define SRP_AER_REQ 0x82 213 214#define SRP_CRED_RSP 0x41 215#define SRP_AER_RSP 0x41 216 217/* Flags for srp_rsp flags field */ 218#define SRP_RSPVALID 0x01 219#define SRP_SNSVALID 0x02 220#define SRP_DOOVER 0x04 221#define SRP_DOUNDER 0x08 222#define SRP_DIOVER 0x10 223#define SRP_DIUNDER 0x20 224 225#define MAD_SUCESS 0x00 226#define MAD_NOT_SUPPORTED 0xf1 227#define MAD_FAILED 0xf7 228 229#define MAD_EMPTY_IU 0x01 230#define MAD_ERROR_LOGGING_REQUEST 0x02 231#define MAD_ADAPTER_INFO_REQUEST 0x03 232#define MAD_CAPABILITIES_EXCHANGE 0x05 233#define MAD_PHYS_ADAP_INFO_REQUEST 0x06 234#define MAD_TAPE_PASSTHROUGH_REQUEST 0x07 235#define MAD_ENABLE_FAST_FAIL 0x08 236 237static int vscsi_probe(device_t); 238static int vscsi_attach(device_t); 239static int vscsi_detach(device_t); 240static void vscsi_cam_action(struct cam_sim *, union ccb *); 241static void vscsi_cam_poll(struct cam_sim *); 242static void vscsi_intr(void *arg); 243static void vscsi_check_response_queue(struct vscsi_softc *sc); 244static void vscsi_setup_bus(struct vscsi_softc *sc); 245 246static void vscsi_srp_login(struct vscsi_softc *sc); 247static void vscsi_crq_load_cb(void *, bus_dma_segment_t *, int, int); 248static void vscsi_scsi_command(void *xxp, bus_dma_segment_t *segs, 249 int nsegs, int err); 250static void vscsi_task_management(struct vscsi_softc *sc, union ccb *ccb); 251static void vscsi_srp_response(struct vscsi_xfer *, struct vscsi_crq *); 252 253static devclass_t vscsi_devclass; 254static device_method_t vscsi_methods[] = { 255 DEVMETHOD(device_probe, vscsi_probe), 256 DEVMETHOD(device_attach, vscsi_attach), 257 DEVMETHOD(device_detach, vscsi_detach), 258 259 DEVMETHOD_END 260}; 261static driver_t vscsi_driver = { 262 "vscsi", 263 vscsi_methods, 264 sizeof(struct vscsi_softc) 265}; 266DRIVER_MODULE(vscsi, vdevice, vscsi_driver, vscsi_devclass, 0, 0); 267MALLOC_DEFINE(M_VSCSI, "vscsi", "CAM device queue for VSCSI"); 268 269static int 270vscsi_probe(device_t dev) 271{ 272 273 if (!ofw_bus_is_compatible(dev, "IBM,v-scsi")) 274 return (ENXIO); 275 276 device_set_desc(dev, "POWER Hypervisor Virtual SCSI Bus"); 277 return (0); 278} 279 280static int 281vscsi_attach(device_t dev) 282{ 283 struct vscsi_softc *sc; 284 struct vscsi_xfer *xp; 285 int error, i; 286 287 sc = device_get_softc(dev); 288 if (sc == NULL) 289 return (EINVAL); 290 291 sc->dev = dev; 292 mtx_init(&sc->io_lock, "vscsi", NULL, MTX_DEF); 293 294 /* Get properties */ 295 OF_getencprop(ofw_bus_get_node(dev), "reg", &sc->unit, 296 sizeof(sc->unit)); 297 298 /* Setup interrupt */ 299 sc->irqid = 0; 300 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqid, 301 RF_ACTIVE); 302 303 if (!sc->irq) { 304 device_printf(dev, "Could not allocate IRQ\n"); 305 mtx_destroy(&sc->io_lock); 306 return (ENXIO); 307 } 308 309 bus_setup_intr(dev, sc->irq, INTR_TYPE_CAM | INTR_MPSAFE | 310 INTR_ENTROPY, NULL, vscsi_intr, sc, &sc->irq_cookie); 311 312 /* Data DMA */ 313 error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0, 314 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE, 315 256, BUS_SPACE_MAXSIZE_32BIT, 0, busdma_lock_mutex, &sc->io_lock, 316 &sc->data_tag); 317 318 TAILQ_INIT(&sc->active_xferq); 319 TAILQ_INIT(&sc->free_xferq); 320 321 /* First XFER for login data */ 322 sc->loginxp.sc = sc; 323 bus_dmamap_create(sc->data_tag, 0, &sc->loginxp.dmamap); 324 TAILQ_INSERT_TAIL(&sc->free_xferq, &sc->loginxp, queue); 325 326 /* CRQ area */ 327 error = bus_dma_tag_create(bus_get_dma_tag(dev), PAGE_SIZE, 0, 328 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 8*PAGE_SIZE, 329 1, BUS_SPACE_MAXSIZE, 0, NULL, NULL, &sc->crq_tag); 330 error = bus_dmamem_alloc(sc->crq_tag, (void **)&sc->crq_queue, 331 BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->crq_map); 332 sc->crq_phys = 0; 333 sc->n_crqs = 0; 334 error = bus_dmamap_load(sc->crq_tag, sc->crq_map, sc->crq_queue, 335 8*PAGE_SIZE, vscsi_crq_load_cb, sc, 0); 336 337 mtx_lock(&sc->io_lock); 338 vscsi_setup_bus(sc); 339 sc->xfer = malloc(sizeof(sc->xfer[0])*sc->max_transactions, M_VSCSI, 340 M_NOWAIT); 341 for (i = 0; i < sc->max_transactions; i++) { 342 xp = &sc->xfer[i]; 343 xp->sc = sc; 344 345 error = bus_dmamap_create(sc->data_tag, 0, &xp->dmamap); 346 if (error) { 347 device_printf(dev, "Could not create DMA map (%d)\n", 348 error); 349 break; 350 } 351 352 TAILQ_INSERT_TAIL(&sc->free_xferq, xp, queue); 353 } 354 mtx_unlock(&sc->io_lock); 355 356 /* Allocate CAM bits */ 357 if ((sc->devq = cam_simq_alloc(sc->max_transactions)) == NULL) 358 return (ENOMEM); 359 360 sc->sim = cam_sim_alloc(vscsi_cam_action, vscsi_cam_poll, "vscsi", sc, 361 device_get_unit(dev), &sc->io_lock, 362 sc->max_transactions, sc->max_transactions, 363 sc->devq); 364 if (sc->sim == NULL) { 365 cam_simq_free(sc->devq); 366 sc->devq = NULL; 367 device_printf(dev, "CAM SIM attach failed\n"); 368 return (EINVAL); 369 } 370 371 372 mtx_lock(&sc->io_lock); 373 if (xpt_bus_register(sc->sim, dev, 0) != 0) { 374 device_printf(dev, "XPT bus registration failed\n"); 375 cam_sim_free(sc->sim, FALSE); 376 sc->sim = NULL; 377 cam_simq_free(sc->devq); 378 sc->devq = NULL; 379 mtx_unlock(&sc->io_lock); 380 return (EINVAL); 381 } 382 mtx_unlock(&sc->io_lock); 383 384 return (0); 385} 386 387static int 388vscsi_detach(device_t dev) 389{ 390 struct vscsi_softc *sc; 391 392 sc = device_get_softc(dev); 393 if (sc == NULL) 394 return (EINVAL); 395 396 if (sc->sim != NULL) { 397 mtx_lock(&sc->io_lock); 398 xpt_bus_deregister(cam_sim_path(sc->sim)); 399 cam_sim_free(sc->sim, FALSE); 400 sc->sim = NULL; 401 mtx_unlock(&sc->io_lock); 402 } 403 404 if (sc->devq != NULL) { 405 cam_simq_free(sc->devq); 406 sc->devq = NULL; 407 } 408 409 mtx_destroy(&sc->io_lock); 410 411 return (0); 412} 413 414static void 415vscsi_cam_action(struct cam_sim *sim, union ccb *ccb) 416{ 417 struct vscsi_softc *sc = cam_sim_softc(sim); 418 419 mtx_assert(&sc->io_lock, MA_OWNED); 420 421 switch (ccb->ccb_h.func_code) { 422 case XPT_PATH_INQ: 423 { 424 struct ccb_pathinq *cpi = &ccb->cpi; 425 426 cpi->version_num = 1; 427 cpi->hba_inquiry = PI_TAG_ABLE; 428 cpi->hba_misc = PIM_EXTLUNS; 429 cpi->target_sprt = 0; 430 cpi->hba_eng_cnt = 0; 431 cpi->max_target = 0; 432 cpi->max_lun = 0; 433 cpi->initiator_id = ~0; 434 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 435 strlcpy(cpi->hba_vid, "IBM", HBA_IDLEN); 436 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 437 cpi->unit_number = cam_sim_unit(sim); 438 cpi->bus_id = cam_sim_bus(sim); 439 cpi->base_transfer_speed = 150000; 440 cpi->transport = XPORT_SRP; 441 cpi->transport_version = 0; 442 cpi->protocol = PROTO_SCSI; 443 cpi->protocol_version = SCSI_REV_SPC4; 444 cpi->ccb_h.status = CAM_REQ_CMP; 445 break; 446 } 447 case XPT_RESET_BUS: 448 ccb->ccb_h.status = CAM_REQ_CMP; 449 break; 450 case XPT_RESET_DEV: 451 ccb->ccb_h.status = CAM_REQ_INPROG; 452 vscsi_task_management(sc, ccb); 453 return; 454 case XPT_GET_TRAN_SETTINGS: 455 ccb->cts.protocol = PROTO_SCSI; 456 ccb->cts.protocol_version = SCSI_REV_SPC4; 457 ccb->cts.transport = XPORT_SRP; 458 ccb->cts.transport_version = 0; 459 ccb->cts.proto_specific.valid = 0; 460 ccb->cts.xport_specific.valid = 0; 461 ccb->ccb_h.status = CAM_REQ_CMP; 462 break; 463 case XPT_SET_TRAN_SETTINGS: 464 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 465 break; 466 case XPT_SCSI_IO: 467 { 468 struct vscsi_xfer *xp; 469 470 ccb->ccb_h.status = CAM_REQ_INPROG; 471 472 xp = TAILQ_FIRST(&sc->free_xferq); 473 if (xp == NULL) 474 panic("SCSI queue flooded"); 475 xp->ccb = ccb; 476 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 477 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 478 bus_dmamap_load_ccb(sc->data_tag, xp->dmamap, 479 ccb, vscsi_scsi_command, xp, 0); 480 481 return; 482 } 483 default: 484 ccb->ccb_h.status = CAM_REQ_INVALID; 485 break; 486 } 487 488 xpt_done(ccb); 489 return; 490} 491 492static void 493vscsi_srp_login(struct vscsi_softc *sc) 494{ 495 struct vscsi_xfer *xp; 496 struct srp_login *login; 497 struct vscsi_crq crq; 498 int err; 499 500 mtx_assert(&sc->io_lock, MA_OWNED); 501 502 xp = TAILQ_FIRST(&sc->free_xferq); 503 if (xp == NULL) 504 panic("SCSI queue flooded"); 505 xp->ccb = NULL; 506 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 507 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 508 509 /* Set up command */ 510 xp->srp_iu_size = crq.iu_length = 64; 511 err = vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 512 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 513 if (err) 514 panic("Error during VMEM allocation (%d)", err); 515 516 login = (struct srp_login *)((uint8_t *)xp->sc->srp_iu_queue + 517 (uintptr_t)xp->srp_iu_offset); 518 bzero(login, xp->srp_iu_size); 519 login->type = SRP_LOGIN_REQ; 520 login->tag = (uint64_t)(xp); 521 login->max_cmd_length = htobe64(256); 522 login->buffer_formats = htobe16(0x1 | 0x2); /* Direct and indirect */ 523 login->flags = 0; 524 525 /* Create CRQ entry */ 526 crq.valid = 0x80; 527 crq.format = 0x01; 528 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 529 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 530 531 err = phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 532 ((uint64_t *)(&crq))[1]); 533 if (err != 0) 534 panic("CRQ send failure (%d)", err); 535} 536 537static void 538vscsi_task_management(struct vscsi_softc *sc, union ccb *ccb) 539{ 540 struct srp_tsk_mgmt *cmd; 541 struct vscsi_xfer *xp; 542 struct vscsi_crq crq; 543 int err; 544 545 mtx_assert(&sc->io_lock, MA_OWNED); 546 547 xp = TAILQ_FIRST(&sc->free_xferq); 548 if (xp == NULL) 549 panic("SCSI queue flooded"); 550 xp->ccb = ccb; 551 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 552 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 553 554 xp->srp_iu_size = crq.iu_length = sizeof(*cmd); 555 err = vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 556 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 557 if (err) 558 panic("Error during VMEM allocation (%d)", err); 559 560 cmd = (struct srp_tsk_mgmt *)((uint8_t *)xp->sc->srp_iu_queue + 561 (uintptr_t)xp->srp_iu_offset); 562 bzero(cmd, xp->srp_iu_size); 563 cmd->type = SRP_TSK_MGMT; 564 cmd->tag = (uint64_t)xp; 565 cmd->lun = htobe64(CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun)); 566 567 switch (ccb->ccb_h.func_code) { 568 case XPT_RESET_DEV: 569 cmd->function = 0x08; 570 break; 571 default: 572 panic("Unimplemented code %d", ccb->ccb_h.func_code); 573 break; 574 } 575 576 bus_dmamap_sync(xp->sc->crq_tag, xp->sc->crq_map, BUS_DMASYNC_PREWRITE); 577 578 /* Create CRQ entry */ 579 crq.valid = 0x80; 580 crq.format = 0x01; 581 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 582 583 err = phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 584 ((uint64_t *)(&crq))[1]); 585 if (err != 0) 586 panic("CRQ send failure (%d)", err); 587} 588 589static void 590vscsi_scsi_command(void *xxp, bus_dma_segment_t *segs, int nsegs, int err) 591{ 592 struct vscsi_xfer *xp = xxp; 593 uint8_t *cdb; 594 union ccb *ccb = xp->ccb; 595 struct srp_cmd *cmd; 596 uint64_t chunk_addr; 597 uint32_t chunk_size; 598 int desc_start, i; 599 struct vscsi_crq crq; 600 601 KASSERT(err == 0, ("DMA error %d\n", err)); 602 603 mtx_assert(&xp->sc->io_lock, MA_OWNED); 604 605 cdb = (ccb->ccb_h.flags & CAM_CDB_POINTER) ? 606 ccb->csio.cdb_io.cdb_ptr : ccb->csio.cdb_io.cdb_bytes; 607 608 /* Command format from Table 20, page 37 of SRP spec */ 609 crq.iu_length = 48 + ((nsegs > 1) ? 20 : 16) + 610 ((ccb->csio.cdb_len > 16) ? (ccb->csio.cdb_len - 16) : 0); 611 xp->srp_iu_size = crq.iu_length; 612 if (nsegs > 1) 613 xp->srp_iu_size += nsegs*16; 614 xp->srp_iu_size = roundup(xp->srp_iu_size, 16); 615 err = vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 616 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 617 if (err) 618 panic("Error during VMEM allocation (%d)", err); 619 620 cmd = (struct srp_cmd *)((uint8_t *)xp->sc->srp_iu_queue + 621 (uintptr_t)xp->srp_iu_offset); 622 bzero(cmd, xp->srp_iu_size); 623 cmd->type = SRP_CMD; 624 if (ccb->csio.cdb_len > 16) 625 cmd->additional_cdb = (ccb->csio.cdb_len - 16) << 2; 626 memcpy(cmd->cdb, cdb, ccb->csio.cdb_len); 627 628 cmd->tag = (uint64_t)(xp); /* Let the responder find this again */ 629 cmd->lun = htobe64(CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun)); 630 631 if (nsegs > 1) { 632 /* Use indirect descriptors */ 633 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 634 case CAM_DIR_OUT: 635 cmd->formats = (2 << 4); 636 break; 637 case CAM_DIR_IN: 638 cmd->formats = 2; 639 break; 640 default: 641 panic("Does not support bidirectional commands (%d)", 642 ccb->ccb_h.flags & CAM_DIR_MASK); 643 break; 644 } 645 646 desc_start = ((ccb->csio.cdb_len > 16) ? 647 ccb->csio.cdb_len - 16 : 0); 648 chunk_addr = xp->sc->srp_iu_phys + xp->srp_iu_offset + 20 + 649 desc_start + sizeof(*cmd); 650 chunk_size = 16*nsegs; 651 memcpy(&cmd->data_payload[desc_start], &chunk_addr, 8); 652 memcpy(&cmd->data_payload[desc_start+12], &chunk_size, 4); 653 chunk_size = 0; 654 for (i = 0; i < nsegs; i++) 655 chunk_size += segs[i].ds_len; 656 memcpy(&cmd->data_payload[desc_start+16], &chunk_size, 4); 657 desc_start += 20; 658 for (i = 0; i < nsegs; i++) { 659 chunk_addr = segs[i].ds_addr; 660 chunk_size = segs[i].ds_len; 661 662 memcpy(&cmd->data_payload[desc_start + 16*i], 663 &chunk_addr, 8); 664 /* Set handle tag to 0 */ 665 memcpy(&cmd->data_payload[desc_start + 16*i + 12], 666 &chunk_size, 4); 667 } 668 } else if (nsegs == 1) { 669 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 670 case CAM_DIR_OUT: 671 cmd->formats = (1 << 4); 672 break; 673 case CAM_DIR_IN: 674 cmd->formats = 1; 675 break; 676 default: 677 panic("Does not support bidirectional commands (%d)", 678 ccb->ccb_h.flags & CAM_DIR_MASK); 679 break; 680 } 681 682 /* 683 * Memory descriptor: 684 * 8 byte address 685 * 4 byte handle 686 * 4 byte length 687 */ 688 689 chunk_addr = segs[0].ds_addr; 690 chunk_size = segs[0].ds_len; 691 desc_start = ((ccb->csio.cdb_len > 16) ? 692 ccb->csio.cdb_len - 16 : 0); 693 694 memcpy(&cmd->data_payload[desc_start], &chunk_addr, 8); 695 /* Set handle tag to 0 */ 696 memcpy(&cmd->data_payload[desc_start+12], &chunk_size, 4); 697 KASSERT(xp->srp_iu_size >= 48 + ((ccb->csio.cdb_len > 16) ? 698 ccb->csio.cdb_len : 16), ("SRP IU command length")); 699 } else { 700 cmd->formats = 0; 701 } 702 bus_dmamap_sync(xp->sc->crq_tag, xp->sc->crq_map, BUS_DMASYNC_PREWRITE); 703 704 /* Create CRQ entry */ 705 crq.valid = 0x80; 706 crq.format = 0x01; 707 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 708 709 err = phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 710 ((uint64_t *)(&crq))[1]); 711 if (err != 0) 712 panic("CRQ send failure (%d)", err); 713} 714 715static void 716vscsi_crq_load_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int err) 717{ 718 struct vscsi_softc *sc = xsc; 719 720 sc->crq_phys = segs[0].ds_addr; 721 sc->n_crqs = PAGE_SIZE/sizeof(struct vscsi_crq); 722 723 sc->srp_iu_queue = (uint8_t *)(sc->crq_queue); 724 sc->srp_iu_phys = segs[0].ds_addr; 725 sc->srp_iu_arena = vmem_create("VSCSI SRP IU", PAGE_SIZE, 726 segs[0].ds_len - PAGE_SIZE, 16, 0, M_BESTFIT | M_NOWAIT); 727} 728 729static void 730vscsi_setup_bus(struct vscsi_softc *sc) 731{ 732 struct vscsi_crq crq; 733 struct vscsi_xfer *xp; 734 int error; 735 736 struct { 737 uint32_t type; 738 uint16_t status; 739 uint16_t length; 740 uint64_t tag; 741 uint64_t buffer; 742 struct { 743 char srp_version[8]; 744 char partition_name[96]; 745 uint32_t partition_number; 746 uint32_t mad_version; 747 uint32_t os_type; 748 uint32_t port_max_txu[8]; 749 } payload; 750 } mad_adapter_info; 751 752 bzero(&crq, sizeof(crq)); 753 754 /* Init message */ 755 crq.valid = 0xc0; 756 crq.format = 0x01; 757 758 do { 759 error = phyp_hcall(H_FREE_CRQ, sc->unit); 760 } while (error == H_BUSY); 761 762 /* See initialization sequence page 757 */ 763 bzero(sc->crq_queue, sc->n_crqs*sizeof(sc->crq_queue[0])); 764 sc->cur_crq = 0; 765 sc->bus_initialized = 0; 766 sc->bus_logged_in = 0; 767 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 768 error = phyp_hcall(H_REG_CRQ, sc->unit, sc->crq_phys, 769 sc->n_crqs*sizeof(sc->crq_queue[0])); 770 KASSERT(error == 0, ("CRQ registration success")); 771 772 error = phyp_hcall(H_SEND_CRQ, sc->unit, ((uint64_t *)(&crq))[0], 773 ((uint64_t *)(&crq))[1]); 774 if (error != 0) 775 panic("CRQ setup failure (%d)", error); 776 777 while (sc->bus_initialized == 0) 778 vscsi_check_response_queue(sc); 779 780 /* Send MAD adapter info */ 781 mad_adapter_info.type = MAD_ADAPTER_INFO_REQUEST; 782 mad_adapter_info.status = 0; 783 mad_adapter_info.length = sizeof(mad_adapter_info.payload); 784 785 strcpy(mad_adapter_info.payload.srp_version, "16.a"); 786 strcpy(mad_adapter_info.payload.partition_name, "UNKNOWN"); 787 mad_adapter_info.payload.partition_number = -1; 788 mad_adapter_info.payload.mad_version = 1; 789 mad_adapter_info.payload.os_type = 2; /* Claim we are Linux */ 790 mad_adapter_info.payload.port_max_txu[0] = 0; 791 /* If this fails, we get the defaults above */ 792 OF_getprop(OF_finddevice("/"), "ibm,partition-name", 793 mad_adapter_info.payload.partition_name, 794 sizeof(mad_adapter_info.payload.partition_name)); 795 OF_getprop(OF_finddevice("/"), "ibm,partition-no", 796 &mad_adapter_info.payload.partition_number, 797 sizeof(mad_adapter_info.payload.partition_number)); 798 799 xp = TAILQ_FIRST(&sc->free_xferq); 800 xp->ccb = NULL; 801 TAILQ_REMOVE(&sc->free_xferq, xp, queue); 802 TAILQ_INSERT_TAIL(&sc->active_xferq, xp, queue); 803 xp->srp_iu_size = crq.iu_length = sizeof(mad_adapter_info); 804 vmem_alloc(xp->sc->srp_iu_arena, xp->srp_iu_size, 805 M_BESTFIT | M_NOWAIT, &xp->srp_iu_offset); 806 mad_adapter_info.buffer = xp->sc->srp_iu_phys + xp->srp_iu_offset + 24; 807 mad_adapter_info.tag = (uint64_t)xp; 808 memcpy((uint8_t *)xp->sc->srp_iu_queue + (uintptr_t)xp->srp_iu_offset, 809 &mad_adapter_info, sizeof(mad_adapter_info)); 810 crq.valid = 0x80; 811 crq.format = 0x02; 812 crq.iu_data = xp->sc->srp_iu_phys + xp->srp_iu_offset; 813 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 814 phyp_hcall(H_SEND_CRQ, xp->sc->unit, ((uint64_t *)(&crq))[0], 815 ((uint64_t *)(&crq))[1]); 816 817 while (TAILQ_EMPTY(&sc->free_xferq)) 818 vscsi_check_response_queue(sc); 819 820 /* Send SRP login */ 821 vscsi_srp_login(sc); 822 while (sc->bus_logged_in == 0) 823 vscsi_check_response_queue(sc); 824 825 error = phyp_hcall(H_VIO_SIGNAL, sc->unit, 1); /* Enable interrupts */ 826} 827 828 829static void 830vscsi_intr(void *xsc) 831{ 832 struct vscsi_softc *sc = xsc; 833 834 mtx_lock(&sc->io_lock); 835 vscsi_check_response_queue(sc); 836 mtx_unlock(&sc->io_lock); 837} 838 839static void 840vscsi_srp_response(struct vscsi_xfer *xp, struct vscsi_crq *crq) 841{ 842 union ccb *ccb = xp->ccb; 843 struct vscsi_softc *sc = xp->sc; 844 struct srp_rsp *rsp; 845 uint32_t sense_len; 846 847 /* SRP response packet in original request */ 848 rsp = (struct srp_rsp *)((uint8_t *)sc->srp_iu_queue + 849 (uintptr_t)xp->srp_iu_offset); 850 ccb->csio.scsi_status = rsp->status; 851 if (ccb->csio.scsi_status == SCSI_STATUS_OK) 852 ccb->ccb_h.status = CAM_REQ_CMP; 853 else 854 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR; 855#ifdef NOTYET 856 /* Collect fast fail codes */ 857 if (crq->status != 0) 858 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 859#endif 860 861 if (ccb->ccb_h.status != CAM_REQ_CMP) { 862 ccb->ccb_h.status |= CAM_DEV_QFRZN; 863 xpt_freeze_devq(ccb->ccb_h.path, /*count*/ 1); 864 } 865 866 if (!(rsp->flags & SRP_RSPVALID)) 867 rsp->response_data_len = 0; 868 if (!(rsp->flags & SRP_SNSVALID)) 869 rsp->sense_data_len = 0; 870 if (!(rsp->flags & (SRP_DOOVER | SRP_DOUNDER))) 871 rsp->data_out_resid = 0; 872 if (!(rsp->flags & (SRP_DIOVER | SRP_DIUNDER))) 873 rsp->data_in_resid = 0; 874 875 if (rsp->flags & SRP_SNSVALID) { 876 bzero(&ccb->csio.sense_data, sizeof(struct scsi_sense_data)); 877 ccb->ccb_h.status |= CAM_AUTOSNS_VALID; 878 sense_len = min(be32toh(rsp->sense_data_len), 879 ccb->csio.sense_len); 880 memcpy(&ccb->csio.sense_data, 881 &rsp->data_payload[be32toh(rsp->response_data_len)], 882 sense_len); 883 ccb->csio.sense_resid = ccb->csio.sense_len - 884 be32toh(rsp->sense_data_len); 885 } 886 887 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 888 case CAM_DIR_OUT: 889 ccb->csio.resid = rsp->data_out_resid; 890 break; 891 case CAM_DIR_IN: 892 ccb->csio.resid = rsp->data_in_resid; 893 break; 894 } 895 896 bus_dmamap_sync(sc->data_tag, xp->dmamap, BUS_DMASYNC_POSTREAD); 897 bus_dmamap_unload(sc->data_tag, xp->dmamap); 898 xpt_done(ccb); 899 xp->ccb = NULL; 900} 901 902static void 903vscsi_login_response(struct vscsi_xfer *xp, struct vscsi_crq *crq) 904{ 905 struct vscsi_softc *sc = xp->sc; 906 struct srp_login_rsp *rsp; 907 908 /* SRP response packet in original request */ 909 rsp = (struct srp_login_rsp *)((uint8_t *)sc->srp_iu_queue + 910 (uintptr_t)xp->srp_iu_offset); 911 KASSERT(be16toh(rsp->buffer_formats) & 0x3, ("Both direct and indirect " 912 "buffers supported")); 913 914 sc->max_transactions = be32toh(rsp->request_limit_delta); 915 device_printf(sc->dev, "Queue depth %d commands\n", 916 sc->max_transactions); 917 sc->bus_logged_in = 1; 918} 919 920static void 921vscsi_cam_poll(struct cam_sim *sim) 922{ 923 struct vscsi_softc *sc = cam_sim_softc(sim); 924 925 vscsi_check_response_queue(sc); 926} 927 928static void 929vscsi_check_response_queue(struct vscsi_softc *sc) 930{ 931 struct vscsi_crq *crq; 932 struct vscsi_xfer *xp; 933 int code; 934 935 mtx_assert(&sc->io_lock, MA_OWNED); 936 937 while (sc->crq_queue[sc->cur_crq].valid != 0) { 938 /* The hypercalls at both ends of this are not optimal */ 939 phyp_hcall(H_VIO_SIGNAL, sc->unit, 0); 940 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_POSTREAD); 941 942 crq = &sc->crq_queue[sc->cur_crq]; 943 944 switch (crq->valid) { 945 case 0xc0: 946 if (crq->format == 0x02) 947 sc->bus_initialized = 1; 948 break; 949 case 0x80: 950 /* IU data is set to tag pointer (the XP) */ 951 xp = (struct vscsi_xfer *)crq->iu_data; 952 953 switch (crq->format) { 954 case 0x01: 955 code = *((uint8_t *)sc->srp_iu_queue + 956 (uintptr_t)xp->srp_iu_offset); 957 switch (code) { 958 case SRP_RSP: 959 vscsi_srp_response(xp, crq); 960 break; 961 case SRP_LOGIN_RSP: 962 vscsi_login_response(xp, crq); 963 break; 964 default: 965 device_printf(sc->dev, "Unknown SRP " 966 "response code %d\n", code); 967 break; 968 } 969 break; 970 case 0x02: 971 /* Ignore management datagrams */ 972 break; 973 default: 974 panic("Unknown CRQ format %d\n", crq->format); 975 break; 976 } 977 vmem_free(sc->srp_iu_arena, xp->srp_iu_offset, 978 xp->srp_iu_size); 979 TAILQ_REMOVE(&sc->active_xferq, xp, queue); 980 TAILQ_INSERT_TAIL(&sc->free_xferq, xp, queue); 981 break; 982 default: 983 device_printf(sc->dev, 984 "Unknown CRQ message type %d\n", crq->valid); 985 break; 986 } 987 988 crq->valid = 0; 989 sc->cur_crq = (sc->cur_crq + 1) % sc->n_crqs; 990 991 bus_dmamap_sync(sc->crq_tag, sc->crq_map, BUS_DMASYNC_PREWRITE); 992 phyp_hcall(H_VIO_SIGNAL, sc->unit, 1); 993 } 994} 995 996