| 1 | /* |
| 2 | * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator |
| 3 | * |
| 4 | * PAPR Virtual SCSI, aka ibmvscsi |
| 5 | * |
| 6 | * Copyright (c) 2010,2011 Benjamin Herrenschmidt, IBM Corporation. |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | * of this software and associated documentation files (the "Software"), to deal |
| 10 | * in the Software without restriction, including without limitation the rights |
| 11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | * copies of the Software, and to permit persons to whom the Software is |
| 13 | * furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 21 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 24 | * THE SOFTWARE. |
| 25 | * |
| 26 | * TODO: |
| 27 | * |
| 28 | * - Cleanups :-) |
| 29 | * - Sort out better how to assign devices to VSCSI instances |
| 30 | * - Fix residual counts |
| 31 | * - Add indirect descriptors support |
| 32 | * - Maybe do autosense (PAPR seems to mandate it, linux doesn't care) |
| 33 | */ |
| 34 | |
| 35 | #include "qemu/osdep.h" |
| 36 | #include "qemu/module.h" |
| 37 | #include "hw/scsi/scsi.h" |
| 38 | #include "migration/vmstate.h" |
| 39 | #include "scsi/constants.h" |
| 40 | #include "srp.h" |
| 41 | #include "hw/ppc/spapr.h" |
| 42 | #include "hw/ppc/spapr_vio.h" |
| 43 | #include "hw/core/qdev-properties.h" |
| 44 | #include "viosrp.h" |
| 45 | #include "trace.h" |
| 46 | |
| 47 | #include <libfdt.h> |
| 48 | #include "qom/object.h" |
| 49 | |
| 50 | /* |
| 51 | * Virtual SCSI device |
| 52 | */ |
| 53 | |
| 54 | /* Random numbers */ |
| 55 | #define VSCSI_MAX_SECTORS 4096 |
| 56 | #define VSCSI_REQ_LIMIT 24 |
| 57 | |
| 58 | /* Maximum size of a IU payload */ |
| 59 | #define SRP_MAX_IU_DATA_LEN (SRP_MAX_IU_LEN - sizeof(union srp_iu)) |
| 60 | #define SRP_RSP_SENSE_DATA_LEN 18 |
| 61 | |
| 62 | #define SRP_REPORT_LUNS_WLUN 0xc10100000000000ULL |
| 63 | |
| 64 | typedef union vscsi_crq { |
| 65 | struct viosrp_crq s; |
| 66 | uint8_t raw[16]; |
| 67 | } vscsi_crq; |
| 68 | |
| 69 | typedef struct vscsi_req { |
| 70 | vscsi_crq crq; |
| 71 | uint8_t viosrp_iu_buf[SRP_MAX_IU_LEN]; |
| 72 | |
| 73 | /* SCSI request tracking */ |
| 74 | SCSIRequest *sreq; |
| 75 | uint32_t qtag; /* qemu tag != srp tag */ |
| 76 | bool active; |
| 77 | bool writing; |
| 78 | bool dma_error; |
| 79 | uint32_t data_len; |
| 80 | uint32_t senselen; |
| 81 | uint8_t sense[SCSI_SENSE_BUF_SIZE]; |
| 82 | |
| 83 | /* RDMA related bits */ |
| 84 | uint8_t dma_fmt; |
| 85 | uint16_t local_desc; |
| 86 | uint16_t total_desc; |
| 87 | uint16_t cdb_offset; |
| 88 | uint16_t cur_desc_num; |
| 89 | uint16_t cur_desc_offset; |
| 90 | } vscsi_req; |
| 91 | |
| 92 | #define TYPE_VIO_SPAPR_VSCSI_DEVICE "spapr-vscsi" |
| 93 | OBJECT_DECLARE_SIMPLE_TYPE(VSCSIState, VIO_SPAPR_VSCSI_DEVICE) |
| 94 | |
| 95 | struct VSCSIState { |
| 96 | SpaprVioDevice vdev; |
| 97 | SCSIBus bus; |
| 98 | vscsi_req reqs[VSCSI_REQ_LIMIT]; |
| 99 | }; |
| 100 | |
| 101 | static union viosrp_iu *req_iu(vscsi_req *req) |
| 102 | { |
| 103 | return (union viosrp_iu *)req->viosrp_iu_buf; |
| 104 | } |
| 105 | |
| 106 | static struct vscsi_req *vscsi_get_req(VSCSIState *s) |
| 107 | { |
| 108 | vscsi_req *req; |
| 109 | int i; |
| 110 | |
| 111 | for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
| 112 | req = &s->reqs[i]; |
| 113 | if (!req->active) { |
| 114 | memset(req, 0, sizeof(*req)); |
| 115 | req->qtag = i; |
| 116 | req->active = 1; |
| 117 | return req; |
| 118 | } |
| 119 | } |
| 120 | return NULL; |
| 121 | } |
| 122 | |
| 123 | static struct vscsi_req *vscsi_find_req(VSCSIState *s, uint64_t srp_tag) |
| 124 | { |
| 125 | vscsi_req *req; |
| 126 | int i; |
| 127 | |
| 128 | for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
| 129 | req = &s->reqs[i]; |
| 130 | if (req_iu(req)->srp.cmd.tag == srp_tag) { |
| 131 | return req; |
| 132 | } |
| 133 | } |
| 134 | return NULL; |
| 135 | } |
| 136 | |
| 137 | static void vscsi_put_req(vscsi_req *req) |
| 138 | { |
| 139 | if (req->sreq != NULL) { |
| 140 | scsi_req_unref(req->sreq); |
| 141 | } |
| 142 | req->sreq = NULL; |
| 143 | req->active = 0; |
| 144 | } |
| 145 | |
| 146 | static SCSIDevice *vscsi_device_find(SCSIBus *bus, uint64_t srp_lun, int *lun) |
| 147 | { |
| 148 | int channel = 0, id = 0; |
| 149 | |
| 150 | retry: |
| 151 | switch (srp_lun >> 62) { |
| 152 | case 0: |
| 153 | if ((srp_lun >> 56) != 0) { |
| 154 | channel = (srp_lun >> 56) & 0x3f; |
| 155 | id = (srp_lun >> 48) & 0xff; |
| 156 | srp_lun <<= 16; |
| 157 | goto retry; |
| 158 | } |
| 159 | *lun = (srp_lun >> 48) & 0xff; |
| 160 | break; |
| 161 | |
| 162 | case 1: |
| 163 | *lun = (srp_lun >> 48) & 0x3fff; |
| 164 | break; |
| 165 | case 2: |
| 166 | channel = (srp_lun >> 53) & 0x7; |
| 167 | id = (srp_lun >> 56) & 0x3f; |
| 168 | *lun = (srp_lun >> 48) & 0x1f; |
| 169 | break; |
| 170 | case 3: |
| 171 | *lun = -1; |
| 172 | return NULL; |
| 173 | default: |
| 174 | abort(); |
| 175 | } |
| 176 | |
| 177 | return scsi_device_find(bus, channel, id, *lun); |
| 178 | } |
| 179 | |
| 180 | static int vscsi_send_iu(VSCSIState *s, vscsi_req *req, |
| 181 | uint64_t length, uint8_t format) |
| 182 | { |
| 183 | long rc, rc1; |
| 184 | |
| 185 | assert(length <= SRP_MAX_IU_LEN); |
| 186 | |
| 187 | /* First copy the SRP */ |
| 188 | rc = spapr_vio_dma_write(&s->vdev, req->crq.s.IU_data_ptr, |
| 189 | &req->viosrp_iu_buf, length); |
| 190 | if (rc) { |
| 191 | fprintf(stderr, "vscsi_send_iu: DMA write failure !\n"); |
| 192 | } |
| 193 | |
| 194 | req->crq.s.valid = 0x80; |
| 195 | req->crq.s.format = format; |
| 196 | req->crq.s.reserved = 0x00; |
| 197 | req->crq.s.timeout = cpu_to_be16(0x0000); |
| 198 | req->crq.s.IU_length = cpu_to_be16(length); |
| 199 | req->crq.s.IU_data_ptr = req_iu(req)->srp.rsp.tag; /* right byte order */ |
| 200 | |
| 201 | if (rc == 0) { |
| 202 | req->crq.s.status = VIOSRP_OK; |
| 203 | } else { |
| 204 | req->crq.s.status = VIOSRP_ADAPTER_FAIL; |
| 205 | } |
| 206 | |
| 207 | rc1 = spapr_vio_send_crq(&s->vdev, req->crq.raw); |
| 208 | if (rc1) { |
| 209 | fprintf(stderr, "vscsi_send_iu: Error sending response\n"); |
| 210 | return rc1; |
| 211 | } |
| 212 | |
| 213 | return rc; |
| 214 | } |
| 215 | |
| 216 | static void vscsi_makeup_sense(VSCSIState *s, vscsi_req *req, |
| 217 | uint8_t key, uint8_t asc, uint8_t ascq) |
| 218 | { |
| 219 | req->senselen = SRP_RSP_SENSE_DATA_LEN; |
| 220 | |
| 221 | /* Valid bit and 'current errors' */ |
| 222 | req->sense[0] = (0x1 << 7 | 0x70); |
| 223 | /* Sense key */ |
| 224 | req->sense[2] = key; |
| 225 | /* Additional sense length */ |
| 226 | req->sense[7] = 0xa; /* 10 bytes */ |
| 227 | /* Additional sense code */ |
| 228 | req->sense[12] = asc; |
| 229 | req->sense[13] = ascq; |
| 230 | } |
| 231 | |
| 232 | static int vscsi_send_rsp(VSCSIState *s, vscsi_req *req, |
| 233 | uint8_t status, int32_t res_in, int32_t res_out) |
| 234 | { |
| 235 | union viosrp_iu *iu = req_iu(req); |
| 236 | uint64_t tag = iu->srp.rsp.tag; |
| 237 | int total_len = sizeof(iu->srp.rsp); |
| 238 | uint8_t sol_not = iu->srp.cmd.sol_not; |
| 239 | |
| 240 | trace_spapr_vscsi_send_rsp(status, res_in, res_out); |
| 241 | |
| 242 | memset(iu, 0, sizeof(struct srp_rsp)); |
| 243 | iu->srp.rsp.opcode = SRP_RSP; |
| 244 | iu->srp.rsp.req_lim_delta = cpu_to_be32(1); |
| 245 | iu->srp.rsp.tag = tag; |
| 246 | |
| 247 | /* Handle residuals */ |
| 248 | if (res_in < 0) { |
| 249 | iu->srp.rsp.flags |= SRP_RSP_FLAG_DIUNDER; |
| 250 | res_in = -res_in; |
| 251 | } else if (res_in) { |
| 252 | iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER; |
| 253 | } |
| 254 | if (res_out < 0) { |
| 255 | iu->srp.rsp.flags |= SRP_RSP_FLAG_DOUNDER; |
| 256 | res_out = -res_out; |
| 257 | } else if (res_out) { |
| 258 | iu->srp.rsp.flags |= SRP_RSP_FLAG_DOOVER; |
| 259 | } |
| 260 | iu->srp.rsp.data_in_res_cnt = cpu_to_be32(res_in); |
| 261 | iu->srp.rsp.data_out_res_cnt = cpu_to_be32(res_out); |
| 262 | |
| 263 | /* We don't do response data */ |
| 264 | /* iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; */ |
| 265 | iu->srp.rsp.resp_data_len = cpu_to_be32(0); |
| 266 | |
| 267 | /* Handle success vs. failure */ |
| 268 | iu->srp.rsp.status = status; |
| 269 | if (status) { |
| 270 | iu->srp.rsp.sol_not = (sol_not & 0x04) >> 2; |
| 271 | if (req->senselen) { |
| 272 | int sense_data_len = MIN(req->senselen, SRP_MAX_IU_DATA_LEN); |
| 273 | |
| 274 | iu->srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID; |
| 275 | iu->srp.rsp.sense_data_len = cpu_to_be32(sense_data_len); |
| 276 | memcpy(iu->srp.rsp.data, req->sense, sense_data_len); |
| 277 | total_len += sense_data_len; |
| 278 | } |
| 279 | } else { |
| 280 | iu->srp.rsp.sol_not = (sol_not & 0x02) >> 1; |
| 281 | } |
| 282 | |
| 283 | vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT); |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | static inline struct srp_direct_buf vscsi_swap_desc(struct srp_direct_buf desc) |
| 288 | { |
| 289 | desc.va = be64_to_cpu(desc.va); |
| 290 | desc.len = be32_to_cpu(desc.len); |
| 291 | return desc; |
| 292 | } |
| 293 | |
| 294 | static int vscsi_fetch_desc(VSCSIState *s, struct vscsi_req *req, |
| 295 | unsigned n, unsigned buf_offset, |
| 296 | struct srp_direct_buf *ret) |
| 297 | { |
| 298 | struct srp_cmd *cmd = &req_iu(req)->srp.cmd; |
| 299 | |
| 300 | switch (req->dma_fmt) { |
| 301 | case SRP_NO_DATA_DESC: { |
| 302 | trace_spapr_vscsi_fetch_desc_no_data(); |
| 303 | return 0; |
| 304 | } |
| 305 | case SRP_DATA_DESC_DIRECT: { |
| 306 | memcpy(ret, cmd->add_data + req->cdb_offset, sizeof(*ret)); |
| 307 | assert(req->cur_desc_num == 0); |
| 308 | trace_spapr_vscsi_fetch_desc_direct(); |
| 309 | break; |
| 310 | } |
| 311 | case SRP_DATA_DESC_INDIRECT: { |
| 312 | struct srp_indirect_buf *tmp = (struct srp_indirect_buf *) |
| 313 | (cmd->add_data + req->cdb_offset); |
| 314 | if (n < req->local_desc) { |
| 315 | *ret = tmp->desc_list[n]; |
| 316 | trace_spapr_vscsi_fetch_desc_indirect(req->qtag, n, |
| 317 | req->local_desc); |
| 318 | } else if (n < req->total_desc) { |
| 319 | int rc; |
| 320 | struct srp_direct_buf tbl_desc = vscsi_swap_desc(tmp->table_desc); |
| 321 | unsigned desc_offset = n * sizeof(struct srp_direct_buf); |
| 322 | |
| 323 | if (desc_offset >= tbl_desc.len) { |
| 324 | trace_spapr_vscsi_fetch_desc_out_of_range(n, desc_offset); |
| 325 | return -1; |
| 326 | } |
| 327 | rc = spapr_vio_dma_read(&s->vdev, tbl_desc.va + desc_offset, |
| 328 | ret, sizeof(struct srp_direct_buf)); |
| 329 | if (rc) { |
| 330 | trace_spapr_vscsi_fetch_desc_dma_read_error(rc); |
| 331 | return -1; |
| 332 | } |
| 333 | trace_spapr_vscsi_fetch_desc_indirect_seg_ext(req->qtag, n, |
| 334 | req->total_desc, |
| 335 | tbl_desc.va, |
| 336 | tbl_desc.len); |
| 337 | } else { |
| 338 | trace_spapr_vscsi_fetch_desc_out_of_desc(); |
| 339 | return 0; |
| 340 | } |
| 341 | break; |
| 342 | } |
| 343 | default: |
| 344 | fprintf(stderr, "VSCSI: Unknown format %x\n", req->dma_fmt); |
| 345 | return -1; |
| 346 | } |
| 347 | |
| 348 | *ret = vscsi_swap_desc(*ret); |
| 349 | if (buf_offset > ret->len) { |
| 350 | trace_spapr_vscsi_fetch_desc_out_of_desc_boundary(buf_offset, |
| 351 | req->cur_desc_num, |
| 352 | ret->len); |
| 353 | return -1; |
| 354 | } |
| 355 | ret->va += buf_offset; |
| 356 | ret->len -= buf_offset; |
| 357 | |
| 358 | trace_spapr_vscsi_fetch_desc_done(req->cur_desc_num, req->cur_desc_offset, |
| 359 | ret->va, ret->len); |
| 360 | |
| 361 | return ret->len ? 1 : 0; |
| 362 | } |
| 363 | |
| 364 | static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req, |
| 365 | uint8_t *buf, uint32_t len) |
| 366 | { |
| 367 | struct srp_direct_buf md; |
| 368 | uint32_t llen; |
| 369 | int rc = 0; |
| 370 | |
| 371 | rc = vscsi_fetch_desc(s, req, req->cur_desc_num, req->cur_desc_offset, &md); |
| 372 | if (rc < 0) { |
| 373 | return -1; |
| 374 | } else if (rc == 0) { |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | llen = MIN(len, md.len); |
| 379 | if (llen) { |
| 380 | if (req->writing) { /* writing = to device = reading from memory */ |
| 381 | rc = spapr_vio_dma_read(&s->vdev, md.va, buf, llen); |
| 382 | } else { |
| 383 | rc = spapr_vio_dma_write(&s->vdev, md.va, buf, llen); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if (rc) { |
| 388 | return -1; |
| 389 | } |
| 390 | req->cur_desc_offset += llen; |
| 391 | |
| 392 | return llen; |
| 393 | } |
| 394 | |
| 395 | static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req, |
| 396 | uint8_t *buf, uint32_t len) |
| 397 | { |
| 398 | struct srp_direct_buf md; |
| 399 | int rc = 0; |
| 400 | uint32_t llen, total = 0; |
| 401 | |
| 402 | trace_spapr_vscsi_srp_indirect_data(len); |
| 403 | |
| 404 | /* While we have data ... */ |
| 405 | while (len) { |
| 406 | rc = vscsi_fetch_desc(s, req, req->cur_desc_num, req->cur_desc_offset, &md); |
| 407 | if (rc < 0) { |
| 408 | return -1; |
| 409 | } else if (rc == 0) { |
| 410 | break; |
| 411 | } |
| 412 | |
| 413 | /* Perform transfer */ |
| 414 | llen = MIN(len, md.len); |
| 415 | if (req->writing) { /* writing = to device = reading from memory */ |
| 416 | rc = spapr_vio_dma_read(&s->vdev, md.va, buf, llen); |
| 417 | } else { |
| 418 | rc = spapr_vio_dma_write(&s->vdev, md.va, buf, llen); |
| 419 | } |
| 420 | if (rc) { |
| 421 | trace_spapr_vscsi_srp_indirect_data_rw(req->writing, rc); |
| 422 | break; |
| 423 | } |
| 424 | trace_spapr_vscsi_srp_indirect_data_buf(buf[0], buf[1], buf[2], buf[3]); |
| 425 | |
| 426 | len -= llen; |
| 427 | buf += llen; |
| 428 | |
| 429 | total += llen; |
| 430 | |
| 431 | /* Update current position in the current descriptor */ |
| 432 | req->cur_desc_offset += llen; |
| 433 | if (md.len == llen) { |
| 434 | /* Go to the next descriptor if the current one finished */ |
| 435 | ++req->cur_desc_num; |
| 436 | req->cur_desc_offset = 0; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | return rc ? -1 : total; |
| 441 | } |
| 442 | |
| 443 | static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req, |
| 444 | int writing, uint8_t *buf, uint32_t len) |
| 445 | { |
| 446 | int err = 0; |
| 447 | |
| 448 | switch (req->dma_fmt) { |
| 449 | case SRP_NO_DATA_DESC: |
| 450 | trace_spapr_vscsi_srp_transfer_data(len); |
| 451 | break; |
| 452 | case SRP_DATA_DESC_DIRECT: |
| 453 | err = vscsi_srp_direct_data(s, req, buf, len); |
| 454 | break; |
| 455 | case SRP_DATA_DESC_INDIRECT: |
| 456 | err = vscsi_srp_indirect_data(s, req, buf, len); |
| 457 | break; |
| 458 | } |
| 459 | return err; |
| 460 | } |
| 461 | |
| 462 | /* Bits from linux srp */ |
| 463 | static int data_out_desc_size(struct srp_cmd *cmd) |
| 464 | { |
| 465 | int size = 0; |
| 466 | uint8_t fmt = cmd->buf_fmt >> 4; |
| 467 | |
| 468 | switch (fmt) { |
| 469 | case SRP_NO_DATA_DESC: |
| 470 | break; |
| 471 | case SRP_DATA_DESC_DIRECT: |
| 472 | size = sizeof(struct srp_direct_buf); |
| 473 | break; |
| 474 | case SRP_DATA_DESC_INDIRECT: |
| 475 | size = sizeof(struct srp_indirect_buf) + |
| 476 | sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt; |
| 477 | break; |
| 478 | default: |
| 479 | break; |
| 480 | } |
| 481 | return size; |
| 482 | } |
| 483 | |
| 484 | static int vscsi_preprocess_desc(vscsi_req *req) |
| 485 | { |
| 486 | struct srp_cmd *cmd = &req_iu(req)->srp.cmd; |
| 487 | |
| 488 | req->cdb_offset = cmd->add_cdb_len & ~3; |
| 489 | |
| 490 | if (req->writing) { |
| 491 | req->dma_fmt = cmd->buf_fmt >> 4; |
| 492 | } else { |
| 493 | req->cdb_offset += data_out_desc_size(cmd); |
| 494 | req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1); |
| 495 | } |
| 496 | |
| 497 | switch (req->dma_fmt) { |
| 498 | case SRP_NO_DATA_DESC: |
| 499 | break; |
| 500 | case SRP_DATA_DESC_DIRECT: |
| 501 | req->total_desc = req->local_desc = 1; |
| 502 | break; |
| 503 | case SRP_DATA_DESC_INDIRECT: { |
| 504 | struct srp_indirect_buf *ind_tmp = (struct srp_indirect_buf *) |
| 505 | (cmd->add_data + req->cdb_offset); |
| 506 | |
| 507 | req->total_desc = be32_to_cpu(ind_tmp->table_desc.len) / |
| 508 | sizeof(struct srp_direct_buf); |
| 509 | req->local_desc = req->writing ? cmd->data_out_desc_cnt : |
| 510 | cmd->data_in_desc_cnt; |
| 511 | break; |
| 512 | } |
| 513 | default: |
| 514 | fprintf(stderr, |
| 515 | "vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt); |
| 516 | return -1; |
| 517 | } |
| 518 | |
| 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | /* Callback to indicate that the SCSI layer has completed a transfer. */ |
| 523 | static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len) |
| 524 | { |
| 525 | VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(sreq->bus->qbus.parent); |
| 526 | vscsi_req *req = sreq->hba_private; |
| 527 | uint8_t *buf; |
| 528 | int rc = 0; |
| 529 | |
| 530 | trace_spapr_vscsi_transfer_data(sreq->tag, len, req); |
| 531 | if (req == NULL) { |
| 532 | fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag); |
| 533 | return; |
| 534 | } |
| 535 | |
| 536 | if (len) { |
| 537 | buf = scsi_req_get_buf(sreq); |
| 538 | rc = vscsi_srp_transfer_data(s, req, req->writing, buf, len); |
| 539 | } |
| 540 | if (rc < 0) { |
| 541 | fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc); |
| 542 | req->dma_error = true; |
| 543 | scsi_req_cancel(req->sreq); |
| 544 | return; |
| 545 | } |
| 546 | |
| 547 | /* Start next chunk */ |
| 548 | req->data_len -= rc; |
| 549 | scsi_req_continue(sreq); |
| 550 | } |
| 551 | |
| 552 | /* Callback to indicate that the SCSI layer has completed a transfer. */ |
| 553 | static void vscsi_command_complete(SCSIRequest *sreq, size_t resid) |
| 554 | { |
| 555 | VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(sreq->bus->qbus.parent); |
| 556 | vscsi_req *req = sreq->hba_private; |
| 557 | int32_t res_in = 0, res_out = 0; |
| 558 | |
| 559 | trace_spapr_vscsi_command_complete(sreq->tag, sreq->status, req); |
| 560 | if (req == NULL) { |
| 561 | fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag); |
| 562 | return; |
| 563 | } |
| 564 | |
| 565 | if (sreq->status == CHECK_CONDITION) { |
| 566 | req->senselen = scsi_req_get_sense(req->sreq, req->sense, |
| 567 | sizeof(req->sense)); |
| 568 | trace_spapr_vscsi_command_complete_sense_data1(req->senselen, |
| 569 | req->sense[0], req->sense[1], req->sense[2], req->sense[3], |
| 570 | req->sense[4], req->sense[5], req->sense[6], req->sense[7]); |
| 571 | trace_spapr_vscsi_command_complete_sense_data2( |
| 572 | req->sense[8], req->sense[9], req->sense[10], req->sense[11], |
| 573 | req->sense[12], req->sense[13], req->sense[14], req->sense[15]); |
| 574 | } |
| 575 | |
| 576 | trace_spapr_vscsi_command_complete_status(sreq->status); |
| 577 | if (sreq->status == 0) { |
| 578 | /* We handle overflows, not underflows for normal commands, |
| 579 | * but hopefully nobody cares |
| 580 | */ |
| 581 | if (req->writing) { |
| 582 | res_out = req->data_len; |
| 583 | } else { |
| 584 | res_in = req->data_len; |
| 585 | } |
| 586 | } |
| 587 | vscsi_send_rsp(s, req, sreq->status, res_in, res_out); |
| 588 | vscsi_put_req(req); |
| 589 | } |
| 590 | |
| 591 | static void vscsi_request_cancelled(SCSIRequest *sreq) |
| 592 | { |
| 593 | vscsi_req *req = sreq->hba_private; |
| 594 | |
| 595 | if (req->dma_error) { |
| 596 | VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(sreq->bus->qbus.parent); |
| 597 | |
| 598 | vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
| 599 | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
| 600 | } |
| 601 | vscsi_put_req(req); |
| 602 | } |
| 603 | |
| 604 | static const VMStateDescription vmstate_spapr_vscsi_req = { |
| 605 | .name = "spapr_vscsi_req", |
| 606 | .version_id = 1, |
| 607 | .minimum_version_id = 1, |
| 608 | .fields = (const VMStateField[]) { |
| 609 | VMSTATE_BUFFER(crq.raw, vscsi_req), |
| 610 | VMSTATE_BUFFER(viosrp_iu_buf, vscsi_req), |
| 611 | VMSTATE_UINT32(qtag, vscsi_req), |
| 612 | VMSTATE_BOOL(active, vscsi_req), |
| 613 | VMSTATE_UINT32(data_len, vscsi_req), |
| 614 | VMSTATE_BOOL(writing, vscsi_req), |
| 615 | VMSTATE_UINT32(senselen, vscsi_req), |
| 616 | VMSTATE_BUFFER(sense, vscsi_req), |
| 617 | VMSTATE_UINT8(dma_fmt, vscsi_req), |
| 618 | VMSTATE_UINT16(local_desc, vscsi_req), |
| 619 | VMSTATE_UINT16(total_desc, vscsi_req), |
| 620 | VMSTATE_UINT16(cdb_offset, vscsi_req), |
| 621 | /*Restart SCSI request from the beginning for now */ |
| 622 | /*VMSTATE_UINT16(cur_desc_num, vscsi_req), |
| 623 | VMSTATE_UINT16(cur_desc_offset, vscsi_req),*/ |
| 624 | VMSTATE_END_OF_LIST() |
| 625 | }, |
| 626 | }; |
| 627 | |
| 628 | static void vscsi_save_request(QEMUFile *f, SCSIRequest *sreq) |
| 629 | { |
| 630 | vscsi_req *req = sreq->hba_private; |
| 631 | Error *local_err = NULL; |
| 632 | int rc; |
| 633 | |
| 634 | assert(req->active); |
| 635 | |
| 636 | rc = vmstate_save_state(f, &vmstate_spapr_vscsi_req, req, NULL, &local_err); |
| 637 | if (rc < 0) { |
| 638 | error_report_err(local_err); |
| 639 | return; |
| 640 | } |
| 641 | trace_spapr_vscsi_save_request(req->qtag, req->cur_desc_num, |
| 642 | req->cur_desc_offset); |
| 643 | } |
| 644 | |
| 645 | static void *vscsi_load_request(QEMUFile *f, SCSIRequest *sreq) |
| 646 | { |
| 647 | SCSIBus *bus = sreq->bus; |
| 648 | VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(bus->qbus.parent); |
| 649 | vscsi_req *req; |
| 650 | int rc; |
| 651 | Error *local_err = NULL; |
| 652 | |
| 653 | assert(sreq->tag < VSCSI_REQ_LIMIT); |
| 654 | req = &s->reqs[sreq->tag]; |
| 655 | assert(!req->active); |
| 656 | |
| 657 | memset(req, 0, sizeof(*req)); |
| 658 | rc = vmstate_load_state(f, &vmstate_spapr_vscsi_req, req, 1, &local_err); |
| 659 | if (rc) { |
| 660 | fprintf(stderr, "VSCSI: failed loading request tag#%u\n", sreq->tag); |
| 661 | error_report_err(local_err); |
| 662 | return NULL; |
| 663 | } |
| 664 | assert(req->active); |
| 665 | |
| 666 | req->sreq = scsi_req_ref(sreq); |
| 667 | |
| 668 | trace_spapr_vscsi_load_request(req->qtag, req->cur_desc_num, |
| 669 | req->cur_desc_offset); |
| 670 | |
| 671 | return req; |
| 672 | } |
| 673 | |
| 674 | static void vscsi_process_login(VSCSIState *s, vscsi_req *req) |
| 675 | { |
| 676 | union viosrp_iu *iu = req_iu(req); |
| 677 | struct srp_login_rsp *rsp = &iu->srp.login_rsp; |
| 678 | uint64_t tag = iu->srp.rsp.tag; |
| 679 | |
| 680 | trace_spapr_vscsi_process_login(); |
| 681 | |
| 682 | /* TODO handle case that requested size is wrong and |
| 683 | * buffer format is wrong |
| 684 | */ |
| 685 | memset(iu, 0, sizeof(struct srp_login_rsp)); |
| 686 | rsp->opcode = SRP_LOGIN_RSP; |
| 687 | /* Don't advertise quite as many request as we support to |
| 688 | * keep room for management stuff etc... |
| 689 | */ |
| 690 | rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2); |
| 691 | rsp->tag = tag; |
| 692 | rsp->max_it_iu_len = cpu_to_be32(SRP_MAX_IU_LEN); |
| 693 | rsp->max_ti_iu_len = cpu_to_be32(SRP_MAX_IU_LEN); |
| 694 | /* direct and indirect */ |
| 695 | rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); |
| 696 | |
| 697 | vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT); |
| 698 | } |
| 699 | |
| 700 | static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req) |
| 701 | { |
| 702 | uint8_t *cdb = req_iu(req)->srp.cmd.cdb; |
| 703 | uint8_t resp_data[36]; |
| 704 | int rc, len, alen; |
| 705 | |
| 706 | /* We don't do EVPD. Also check that page_code is 0 */ |
| 707 | if ((cdb[1] & 0x01) || cdb[2] != 0) { |
| 708 | /* Send INVALID FIELD IN CDB */ |
| 709 | vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0); |
| 710 | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
| 711 | return; |
| 712 | } |
| 713 | alen = cdb[3]; |
| 714 | alen = (alen << 8) | cdb[4]; |
| 715 | len = MIN(alen, 36); |
| 716 | |
| 717 | /* Fake up inquiry using PQ=3 */ |
| 718 | memset(resp_data, 0, 36); |
| 719 | resp_data[0] = 0x7f; /* Not capable of supporting a device here */ |
| 720 | resp_data[2] = 0x06; /* SPS-4 */ |
| 721 | resp_data[3] = 0x02; /* Resp data format */ |
| 722 | resp_data[4] = 36 - 5; /* Additional length */ |
| 723 | resp_data[7] = 0x10; /* Sync transfers */ |
| 724 | memcpy(&resp_data[16], "QEMU EMPTY ", 16); |
| 725 | memcpy(&resp_data[8], "QEMU ", 8); |
| 726 | |
| 727 | req->writing = 0; |
| 728 | vscsi_preprocess_desc(req); |
| 729 | rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len); |
| 730 | if (rc < 0) { |
| 731 | vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
| 732 | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
| 733 | } else { |
| 734 | vscsi_send_rsp(s, req, 0, 36 - rc, 0); |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | static void vscsi_report_luns(VSCSIState *s, vscsi_req *req) |
| 739 | { |
| 740 | BusChild *kid; |
| 741 | int i, len, n, rc; |
| 742 | uint8_t *resp_data; |
| 743 | bool found_lun0; |
| 744 | |
| 745 | n = 0; |
| 746 | found_lun0 = false; |
| 747 | QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { |
| 748 | SCSIDevice *dev = SCSI_DEVICE(kid->child); |
| 749 | |
| 750 | n += 8; |
| 751 | if (dev->channel == 0 && dev->id == 0 && dev->lun == 0) { |
| 752 | found_lun0 = true; |
| 753 | } |
| 754 | } |
| 755 | if (!found_lun0) { |
| 756 | n += 8; |
| 757 | } |
| 758 | len = n+8; |
| 759 | |
| 760 | resp_data = g_malloc0(len); |
| 761 | stl_be_p(resp_data, n); |
| 762 | i = found_lun0 ? 8 : 16; |
| 763 | QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { |
| 764 | DeviceState *qdev = kid->child; |
| 765 | SCSIDevice *dev = SCSI_DEVICE(qdev); |
| 766 | |
| 767 | if (dev->id == 0 && dev->channel == 0) { |
| 768 | resp_data[i] = 0; /* Use simple LUN for 0 (SAM5 4.7.7.1) */ |
| 769 | } else { |
| 770 | resp_data[i] = (2 << 6); /* Otherwise LUN addressing (4.7.7.4) */ |
| 771 | } |
| 772 | resp_data[i] |= dev->id; |
| 773 | resp_data[i+1] = (dev->channel << 5); |
| 774 | resp_data[i+1] |= dev->lun; |
| 775 | i += 8; |
| 776 | } |
| 777 | |
| 778 | vscsi_preprocess_desc(req); |
| 779 | rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len); |
| 780 | g_free(resp_data); |
| 781 | if (rc < 0) { |
| 782 | vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
| 783 | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
| 784 | } else { |
| 785 | vscsi_send_rsp(s, req, 0, len - rc, 0); |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req) |
| 790 | { |
| 791 | union srp_iu *srp = &req_iu(req)->srp; |
| 792 | SCSIDevice *sdev; |
| 793 | int n, lun; |
| 794 | size_t cdb_len = sizeof (srp->cmd.cdb) + (srp->cmd.add_cdb_len & ~3); |
| 795 | |
| 796 | if ((srp->cmd.lun == 0 || be64_to_cpu(srp->cmd.lun) == SRP_REPORT_LUNS_WLUN) |
| 797 | && srp->cmd.cdb[0] == REPORT_LUNS) { |
| 798 | vscsi_report_luns(s, req); |
| 799 | return 0; |
| 800 | } |
| 801 | |
| 802 | sdev = vscsi_device_find(&s->bus, be64_to_cpu(srp->cmd.lun), &lun); |
| 803 | if (!sdev) { |
| 804 | trace_spapr_vscsi_queue_cmd_no_drive(be64_to_cpu(srp->cmd.lun)); |
| 805 | if (srp->cmd.cdb[0] == INQUIRY) { |
| 806 | vscsi_inquiry_no_target(s, req); |
| 807 | } else { |
| 808 | vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00); |
| 809 | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
| 810 | } return 1; |
| 811 | } |
| 812 | |
| 813 | req->sreq = scsi_req_new(sdev, req->qtag, lun, srp->cmd.cdb, cdb_len, req); |
| 814 | n = scsi_req_enqueue(req->sreq); |
| 815 | |
| 816 | trace_spapr_vscsi_queue_cmd(req->qtag, srp->cmd.cdb[0], |
| 817 | scsi_command_name(srp->cmd.cdb[0]), lun, n); |
| 818 | |
| 819 | if (n) { |
| 820 | /* Transfer direction must be set before preprocessing the |
| 821 | * descriptors |
| 822 | */ |
| 823 | req->writing = (n < 1); |
| 824 | |
| 825 | /* Preprocess RDMA descriptors */ |
| 826 | vscsi_preprocess_desc(req); |
| 827 | |
| 828 | /* Get transfer direction and initiate transfer */ |
| 829 | if (n > 0) { |
| 830 | req->data_len = n; |
| 831 | } else if (n < 0) { |
| 832 | req->data_len = -n; |
| 833 | } |
| 834 | scsi_req_continue(req->sreq); |
| 835 | } |
| 836 | /* Don't touch req here, it may have been recycled already */ |
| 837 | |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req) |
| 842 | { |
| 843 | union viosrp_iu *iu = req_iu(req); |
| 844 | vscsi_req *tmpreq; |
| 845 | int i, lun = 0, resp = SRP_TSK_MGMT_COMPLETE; |
| 846 | SCSIDevice *d; |
| 847 | uint64_t tag = iu->srp.rsp.tag; |
| 848 | uint8_t sol_not = iu->srp.cmd.sol_not; |
| 849 | |
| 850 | trace_spapr_vscsi_process_tsk_mgmt(iu->srp.tsk_mgmt.tsk_mgmt_func); |
| 851 | d = vscsi_device_find(&s->bus, |
| 852 | be64_to_cpu(req_iu(req)->srp.tsk_mgmt.lun), &lun); |
| 853 | if (!d) { |
| 854 | resp = SRP_TSK_MGMT_FIELDS_INVALID; |
| 855 | } else { |
| 856 | switch (iu->srp.tsk_mgmt.tsk_mgmt_func) { |
| 857 | case SRP_TSK_ABORT_TASK: |
| 858 | if (d->lun != lun) { |
| 859 | resp = SRP_TSK_MGMT_FIELDS_INVALID; |
| 860 | break; |
| 861 | } |
| 862 | |
| 863 | tmpreq = vscsi_find_req(s, req_iu(req)->srp.tsk_mgmt.task_tag); |
| 864 | if (tmpreq && tmpreq->sreq) { |
| 865 | assert(tmpreq->sreq->hba_private); |
| 866 | scsi_req_cancel(tmpreq->sreq); |
| 867 | } |
| 868 | break; |
| 869 | |
| 870 | case SRP_TSK_LUN_RESET: |
| 871 | if (d->lun != lun) { |
| 872 | resp = SRP_TSK_MGMT_FIELDS_INVALID; |
| 873 | break; |
| 874 | } |
| 875 | |
| 876 | device_cold_reset(&d->qdev); |
| 877 | break; |
| 878 | |
| 879 | case SRP_TSK_ABORT_TASK_SET: |
| 880 | case SRP_TSK_CLEAR_TASK_SET: |
| 881 | if (d->lun != lun) { |
| 882 | resp = SRP_TSK_MGMT_FIELDS_INVALID; |
| 883 | break; |
| 884 | } |
| 885 | |
| 886 | for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
| 887 | tmpreq = &s->reqs[i]; |
| 888 | if (req_iu(tmpreq)->srp.cmd.lun |
| 889 | != req_iu(req)->srp.tsk_mgmt.lun) { |
| 890 | continue; |
| 891 | } |
| 892 | if (!tmpreq->active || !tmpreq->sreq) { |
| 893 | continue; |
| 894 | } |
| 895 | assert(tmpreq->sreq->hba_private); |
| 896 | scsi_req_cancel(tmpreq->sreq); |
| 897 | } |
| 898 | break; |
| 899 | |
| 900 | case SRP_TSK_CLEAR_ACA: |
| 901 | resp = SRP_TSK_MGMT_NOT_SUPPORTED; |
| 902 | break; |
| 903 | |
| 904 | default: |
| 905 | resp = SRP_TSK_MGMT_FIELDS_INVALID; |
| 906 | break; |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | /* Compose the response here as */ |
| 911 | QEMU_BUILD_BUG_ON(SRP_MAX_IU_DATA_LEN < 4); |
| 912 | memset(iu, 0, sizeof(struct srp_rsp) + 4); |
| 913 | iu->srp.rsp.opcode = SRP_RSP; |
| 914 | iu->srp.rsp.req_lim_delta = cpu_to_be32(1); |
| 915 | iu->srp.rsp.tag = tag; |
| 916 | iu->srp.rsp.flags |= SRP_RSP_FLAG_RSPVALID; |
| 917 | iu->srp.rsp.resp_data_len = cpu_to_be32(4); |
| 918 | if (resp) { |
| 919 | iu->srp.rsp.sol_not = (sol_not & 0x04) >> 2; |
| 920 | } else { |
| 921 | iu->srp.rsp.sol_not = (sol_not & 0x02) >> 1; |
| 922 | } |
| 923 | |
| 924 | iu->srp.rsp.status = GOOD; |
| 925 | iu->srp.rsp.data[3] = resp; |
| 926 | |
| 927 | vscsi_send_iu(s, req, sizeof(iu->srp.rsp) + 4, VIOSRP_SRP_FORMAT); |
| 928 | |
| 929 | return 1; |
| 930 | } |
| 931 | |
| 932 | static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req) |
| 933 | { |
| 934 | union srp_iu *srp = &req_iu(req)->srp; |
| 935 | int done = 1; |
| 936 | uint8_t opcode = srp->rsp.opcode; |
| 937 | |
| 938 | switch (opcode) { |
| 939 | case SRP_LOGIN_REQ: |
| 940 | vscsi_process_login(s, req); |
| 941 | break; |
| 942 | case SRP_TSK_MGMT: |
| 943 | done = vscsi_process_tsk_mgmt(s, req); |
| 944 | break; |
| 945 | case SRP_CMD: |
| 946 | done = vscsi_queue_cmd(s, req); |
| 947 | break; |
| 948 | case SRP_LOGIN_RSP: |
| 949 | case SRP_I_LOGOUT: |
| 950 | case SRP_T_LOGOUT: |
| 951 | case SRP_RSP: |
| 952 | case SRP_CRED_REQ: |
| 953 | case SRP_CRED_RSP: |
| 954 | case SRP_AER_REQ: |
| 955 | case SRP_AER_RSP: |
| 956 | fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode); |
| 957 | break; |
| 958 | default: |
| 959 | fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode); |
| 960 | } |
| 961 | |
| 962 | return done; |
| 963 | } |
| 964 | |
| 965 | static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req) |
| 966 | { |
| 967 | struct viosrp_adapter_info *sinfo; |
| 968 | struct mad_adapter_info_data info; |
| 969 | int rc; |
| 970 | |
| 971 | sinfo = &req_iu(req)->mad.adapter_info; |
| 972 | |
| 973 | #if 0 /* What for ? */ |
| 974 | rc = spapr_vio_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer), |
| 975 | &info, be16_to_cpu(sinfo->common.length)); |
| 976 | if (rc) { |
| 977 | fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n"); |
| 978 | } |
| 979 | #endif |
| 980 | memset(&info, 0, sizeof(info)); |
| 981 | strcpy(info.srp_version, SRP_VERSION); |
| 982 | memcpy(info.partition_name, "qemu", sizeof("qemu")); |
| 983 | info.partition_number = cpu_to_be32(0); |
| 984 | info.mad_version = cpu_to_be32(1); |
| 985 | info.os_type = cpu_to_be32(2); |
| 986 | info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9); |
| 987 | |
| 988 | rc = spapr_vio_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer), |
| 989 | &info, be16_to_cpu(sinfo->common.length)); |
| 990 | if (rc) { |
| 991 | fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n"); |
| 992 | } |
| 993 | |
| 994 | sinfo->common.status = rc ? cpu_to_be32(1) : 0; |
| 995 | |
| 996 | return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT); |
| 997 | } |
| 998 | |
| 999 | static int vscsi_send_capabilities(VSCSIState *s, vscsi_req *req) |
| 1000 | { |
| 1001 | struct viosrp_capabilities *vcap; |
| 1002 | struct capabilities cap = { }; |
| 1003 | uint16_t len, req_len; |
| 1004 | uint64_t buffer; |
| 1005 | int rc; |
| 1006 | |
| 1007 | vcap = &req_iu(req)->mad.capabilities; |
| 1008 | req_len = len = be16_to_cpu(vcap->common.length); |
| 1009 | buffer = be64_to_cpu(vcap->buffer); |
| 1010 | if (len > sizeof(cap)) { |
| 1011 | fprintf(stderr, "vscsi_send_capabilities: capabilities size mismatch !\n"); |
| 1012 | |
| 1013 | /* |
| 1014 | * Just read and populate the structure that is known. |
| 1015 | * Zero rest of the structure. |
| 1016 | */ |
| 1017 | len = sizeof(cap); |
| 1018 | } |
| 1019 | rc = spapr_vio_dma_read(&s->vdev, buffer, &cap, len); |
| 1020 | if (rc) { |
| 1021 | fprintf(stderr, "vscsi_send_capabilities: DMA read failure !\n"); |
| 1022 | } |
| 1023 | |
| 1024 | /* |
| 1025 | * Current implementation does not support any migration or |
| 1026 | * reservation capabilities. Construct the response telling the |
| 1027 | * guest not to use them. |
| 1028 | */ |
| 1029 | cap.flags = 0; |
| 1030 | cap.migration.ecl = 0; |
| 1031 | cap.reserve.type = 0; |
| 1032 | cap.migration.common.server_support = 0; |
| 1033 | cap.reserve.common.server_support = 0; |
| 1034 | |
| 1035 | rc = spapr_vio_dma_write(&s->vdev, buffer, &cap, len); |
| 1036 | if (rc) { |
| 1037 | fprintf(stderr, "vscsi_send_capabilities: DMA write failure !\n"); |
| 1038 | } |
| 1039 | if (req_len > len) { |
| 1040 | /* |
| 1041 | * Being paranoid and lets not worry about the error code |
| 1042 | * here. Actual write of the cap is done above. |
| 1043 | */ |
| 1044 | spapr_vio_dma_set(&s->vdev, (buffer + len), 0, (req_len - len)); |
| 1045 | } |
| 1046 | vcap->common.status = rc ? cpu_to_be32(1) : 0; |
| 1047 | return vscsi_send_iu(s, req, sizeof(*vcap), VIOSRP_MAD_FORMAT); |
| 1048 | } |
| 1049 | |
| 1050 | static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req) |
| 1051 | { |
| 1052 | union mad_iu *mad = &req_iu(req)->mad; |
| 1053 | bool request_handled = false; |
| 1054 | uint64_t retlen = 0; |
| 1055 | |
| 1056 | switch (be32_to_cpu(mad->empty_iu.common.type)) { |
| 1057 | case VIOSRP_EMPTY_IU_TYPE: |
| 1058 | fprintf(stderr, "Unsupported EMPTY MAD IU\n"); |
| 1059 | retlen = sizeof(mad->empty_iu); |
| 1060 | break; |
| 1061 | case VIOSRP_ERROR_LOG_TYPE: |
| 1062 | fprintf(stderr, "Unsupported ERROR LOG MAD IU\n"); |
| 1063 | retlen = sizeof(mad->error_log); |
| 1064 | break; |
| 1065 | case VIOSRP_ADAPTER_INFO_TYPE: |
| 1066 | vscsi_send_adapter_info(s, req); |
| 1067 | request_handled = true; |
| 1068 | break; |
| 1069 | case VIOSRP_HOST_CONFIG_TYPE: |
| 1070 | retlen = sizeof(mad->host_config); |
| 1071 | break; |
| 1072 | case VIOSRP_CAPABILITIES_TYPE: |
| 1073 | vscsi_send_capabilities(s, req); |
| 1074 | request_handled = true; |
| 1075 | break; |
| 1076 | default: |
| 1077 | fprintf(stderr, "VSCSI: Unknown MAD type %02x\n", |
| 1078 | be32_to_cpu(mad->empty_iu.common.type)); |
| 1079 | /* |
| 1080 | * PAPR+ says that "The length field is set to the length |
| 1081 | * of the data structure(s) used in the command". |
| 1082 | * As we did not recognize the request type, put zero there. |
| 1083 | */ |
| 1084 | retlen = 0; |
| 1085 | } |
| 1086 | |
| 1087 | if (!request_handled) { |
| 1088 | mad->empty_iu.common.status = cpu_to_be16(VIOSRP_MAD_NOT_SUPPORTED); |
| 1089 | vscsi_send_iu(s, req, retlen, VIOSRP_MAD_FORMAT); |
| 1090 | } |
| 1091 | |
| 1092 | return 1; |
| 1093 | } |
| 1094 | |
| 1095 | static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq) |
| 1096 | { |
| 1097 | vscsi_req *req; |
| 1098 | int done; |
| 1099 | |
| 1100 | req = vscsi_get_req(s); |
| 1101 | if (req == NULL) { |
| 1102 | fprintf(stderr, "VSCSI: Failed to get a request !\n"); |
| 1103 | return; |
| 1104 | } |
| 1105 | |
| 1106 | /* We only support a limited number of descriptors, we know |
| 1107 | * the ibmvscsi driver uses up to 10 max, so it should fit |
| 1108 | * in our 256 bytes IUs. If not we'll have to increase the size |
| 1109 | * of the structure. |
| 1110 | */ |
| 1111 | if (crq->s.IU_length > SRP_MAX_IU_LEN) { |
| 1112 | fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n", |
| 1113 | crq->s.IU_length); |
| 1114 | vscsi_put_req(req); |
| 1115 | return; |
| 1116 | } |
| 1117 | |
| 1118 | /* XXX Handle failure differently ? */ |
| 1119 | if (spapr_vio_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->viosrp_iu_buf, |
| 1120 | crq->s.IU_length)) { |
| 1121 | fprintf(stderr, "vscsi_got_payload: DMA read failure !\n"); |
| 1122 | vscsi_put_req(req); |
| 1123 | return; |
| 1124 | } |
| 1125 | memcpy(&req->crq, crq, sizeof(vscsi_crq)); |
| 1126 | |
| 1127 | if (crq->s.format == VIOSRP_MAD_FORMAT) { |
| 1128 | done = vscsi_handle_mad_req(s, req); |
| 1129 | } else { |
| 1130 | done = vscsi_handle_srp_req(s, req); |
| 1131 | } |
| 1132 | |
| 1133 | if (done) { |
| 1134 | vscsi_put_req(req); |
| 1135 | } |
| 1136 | } |
| 1137 | |
| 1138 | |
| 1139 | static int vscsi_do_crq(struct SpaprVioDevice *dev, uint8_t *crq_data) |
| 1140 | { |
| 1141 | VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(dev); |
| 1142 | vscsi_crq crq; |
| 1143 | |
| 1144 | memcpy(crq.raw, crq_data, 16); |
| 1145 | crq.s.timeout = be16_to_cpu(crq.s.timeout); |
| 1146 | crq.s.IU_length = be16_to_cpu(crq.s.IU_length); |
| 1147 | crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr); |
| 1148 | |
| 1149 | trace_spapr_vscsi_do_crq(crq.raw[0], crq.raw[1]); |
| 1150 | |
| 1151 | switch (crq.s.valid) { |
| 1152 | case 0xc0: /* Init command/response */ |
| 1153 | |
| 1154 | /* Respond to initialization request */ |
| 1155 | if (crq.s.format == 0x01) { |
| 1156 | memset(crq.raw, 0, 16); |
| 1157 | crq.s.valid = 0xc0; |
| 1158 | crq.s.format = 0x02; |
| 1159 | spapr_vio_send_crq(dev, crq.raw); |
| 1160 | } |
| 1161 | |
| 1162 | /* Note that in hotplug cases, we might get a 0x02 |
| 1163 | * as a result of us emitting the init request |
| 1164 | */ |
| 1165 | |
| 1166 | break; |
| 1167 | case 0xff: /* Link event */ |
| 1168 | |
| 1169 | /* Not handled for now */ |
| 1170 | |
| 1171 | break; |
| 1172 | case 0x80: /* Payloads */ |
| 1173 | switch (crq.s.format) { |
| 1174 | case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */ |
| 1175 | case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */ |
| 1176 | vscsi_got_payload(s, &crq); |
| 1177 | break; |
| 1178 | case VIOSRP_OS400_FORMAT: |
| 1179 | case VIOSRP_AIX_FORMAT: |
| 1180 | case VIOSRP_LINUX_FORMAT: |
| 1181 | case VIOSRP_INLINE_FORMAT: |
| 1182 | fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n", |
| 1183 | crq.s.format); |
| 1184 | break; |
| 1185 | default: |
| 1186 | fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n", |
| 1187 | crq.s.format); |
| 1188 | } |
| 1189 | break; |
| 1190 | default: |
| 1191 | fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n", |
| 1192 | crq.raw[0], crq.raw[1]); |
| 1193 | }; |
| 1194 | |
| 1195 | return 0; |
| 1196 | } |
| 1197 | |
| 1198 | static const struct SCSIBusInfo vscsi_scsi_info = { |
| 1199 | .tcq = true, |
| 1200 | .max_channel = 7, /* logical unit addressing format */ |
| 1201 | .max_target = 63, |
| 1202 | .max_lun = 31, |
| 1203 | |
| 1204 | .transfer_data = vscsi_transfer_data, |
| 1205 | .complete = vscsi_command_complete, |
| 1206 | .cancel = vscsi_request_cancelled, |
| 1207 | .save_request = vscsi_save_request, |
| 1208 | .load_request = vscsi_load_request, |
| 1209 | }; |
| 1210 | |
| 1211 | static void spapr_vscsi_reset(SpaprVioDevice *dev) |
| 1212 | { |
| 1213 | VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(dev); |
| 1214 | int i; |
| 1215 | |
| 1216 | memset(s->reqs, 0, sizeof(s->reqs)); |
| 1217 | for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
| 1218 | s->reqs[i].qtag = i; |
| 1219 | } |
| 1220 | } |
| 1221 | |
| 1222 | static void spapr_vscsi_realize(SpaprVioDevice *dev, Error **errp) |
| 1223 | { |
| 1224 | VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(dev); |
| 1225 | |
| 1226 | dev->crq.SendFunc = vscsi_do_crq; |
| 1227 | |
| 1228 | scsi_bus_init(&s->bus, sizeof(s->bus), DEVICE(dev), &vscsi_scsi_info); |
| 1229 | |
| 1230 | /* ibmvscsi SCSI bus does not allow hotplug. */ |
| 1231 | qbus_set_hotplug_handler(BUS(&s->bus), NULL); |
| 1232 | } |
| 1233 | |
| 1234 | void spapr_vscsi_create(SpaprVioBus *bus) |
| 1235 | { |
| 1236 | DeviceState *dev; |
| 1237 | |
| 1238 | dev = qdev_new("spapr-vscsi"); |
| 1239 | |
| 1240 | qdev_realize_and_unref(dev, &bus->bus, &error_fatal); |
| 1241 | scsi_bus_legacy_handle_cmdline(&VIO_SPAPR_VSCSI_DEVICE(dev)->bus); |
| 1242 | } |
| 1243 | |
| 1244 | static int spapr_vscsi_devnode(SpaprVioDevice *dev, void *fdt, int node_off) |
| 1245 | { |
| 1246 | int ret; |
| 1247 | |
| 1248 | ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2); |
| 1249 | if (ret < 0) { |
| 1250 | return ret; |
| 1251 | } |
| 1252 | |
| 1253 | ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0); |
| 1254 | if (ret < 0) { |
| 1255 | return ret; |
| 1256 | } |
| 1257 | |
| 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | static const Property spapr_vscsi_properties[] = { |
| 1262 | DEFINE_SPAPR_PROPERTIES(VSCSIState, vdev), |
| 1263 | }; |
| 1264 | |
| 1265 | static const VMStateDescription vmstate_spapr_vscsi = { |
| 1266 | .name = "spapr_vscsi", |
| 1267 | .version_id = 1, |
| 1268 | .minimum_version_id = 1, |
| 1269 | .fields = (const VMStateField[]) { |
| 1270 | VMSTATE_SPAPR_VIO(vdev, VSCSIState), |
| 1271 | /* VSCSI state */ |
| 1272 | /* ???? */ |
| 1273 | |
| 1274 | VMSTATE_END_OF_LIST() |
| 1275 | }, |
| 1276 | }; |
| 1277 | |
| 1278 | static void spapr_vscsi_class_init(ObjectClass *klass, const void *data) |
| 1279 | { |
| 1280 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 1281 | SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); |
| 1282 | |
| 1283 | k->realize = spapr_vscsi_realize; |
| 1284 | k->reset = spapr_vscsi_reset; |
| 1285 | k->devnode = spapr_vscsi_devnode; |
| 1286 | k->dt_name = "v-scsi"; |
| 1287 | k->dt_type = "vscsi"; |
| 1288 | k->dt_compatible = "IBM,v-scsi"; |
| 1289 | k->signal_mask = 0x00000001; |
| 1290 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
| 1291 | device_class_set_props(dc, spapr_vscsi_properties); |
| 1292 | k->rtce_window_size = 0x10000000; |
| 1293 | dc->vmsd = &vmstate_spapr_vscsi; |
| 1294 | } |
| 1295 | |
| 1296 | static const TypeInfo spapr_vscsi_info = { |
| 1297 | .name = TYPE_VIO_SPAPR_VSCSI_DEVICE, |
| 1298 | .parent = TYPE_VIO_SPAPR_DEVICE, |
| 1299 | .instance_size = sizeof(VSCSIState), |
| 1300 | .class_init = spapr_vscsi_class_init, |
| 1301 | }; |
| 1302 | |
| 1303 | static void spapr_vscsi_register_types(void) |
| 1304 | { |
| 1305 | type_register_static(&spapr_vscsi_info); |
| 1306 | } |
| 1307 | |
| 1308 | type_init(spapr_vscsi_register_types) |