2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
4 * PAPR Virtual SCSI, aka ibmvscsi
6 * Copyright (c) 2010,2011 Benjamin Herrenschmidt, IBM Corporation.
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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
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)
36 #include "scsi-defs.h"
40 #include "hw/spapr_vio.h"
41 #include "hw/ppc-viosrp.h"
45 /*#define DEBUG_VSCSI*/
48 #define dprintf(fmt, ...) \
49 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
51 #define dprintf(fmt, ...) \
60 #define VSCSI_MAX_SECTORS 4096
61 #define VSCSI_REQ_LIMIT 24
63 #define SCSI_SENSE_BUF_SIZE 96
64 #define SRP_RSP_SENSE_DATA_LEN 18
66 typedef union vscsi_crq {
71 typedef struct vscsi_req {
75 /* SCSI request tracking */
77 uint32_t qtag; /* qemu tag != srp tag */
83 uint8_t sense[SCSI_SENSE_BUF_SIZE];
85 /* RDMA related bits */
87 struct srp_direct_buf ext_desc;
88 struct srp_direct_buf *cur_desc;
89 struct srp_indirect_buf *ind_desc;
98 vscsi_req reqs[VSCSI_REQ_LIMIT];
101 static struct vscsi_req *vscsi_get_req(VSCSIState *s)
106 for (i = 0; i < VSCSI_REQ_LIMIT; i++) {
109 memset(req, 0, sizeof(*req));
118 static void vscsi_put_req(vscsi_req *req)
120 if (req->sreq != NULL) {
121 scsi_req_unref(req->sreq);
127 static SCSIDevice *vscsi_device_find(SCSIBus *bus, uint64_t srp_lun, int *lun)
129 int channel = 0, id = 0;
132 switch (srp_lun >> 62) {
134 if ((srp_lun >> 56) != 0) {
135 channel = (srp_lun >> 56) & 0x3f;
136 id = (srp_lun >> 48) & 0xff;
140 *lun = (srp_lun >> 48) & 0xff;
144 *lun = (srp_lun >> 48) & 0x3fff;
147 channel = (srp_lun >> 53) & 0x7;
148 id = (srp_lun >> 56) & 0x3f;
149 *lun = (srp_lun >> 48) & 0x1f;
158 return scsi_device_find(bus, channel, id, *lun);
161 static int vscsi_send_iu(VSCSIState *s, vscsi_req *req,
162 uint64_t length, uint8_t format)
166 /* First copy the SRP */
167 rc = spapr_vio_dma_write(&s->vdev, req->crq.s.IU_data_ptr,
170 fprintf(stderr, "vscsi_send_iu: DMA write failure !\n");
173 req->crq.s.valid = 0x80;
174 req->crq.s.format = format;
175 req->crq.s.reserved = 0x00;
176 req->crq.s.timeout = cpu_to_be16(0x0000);
177 req->crq.s.IU_length = cpu_to_be16(length);
178 req->crq.s.IU_data_ptr = req->iu.srp.rsp.tag; /* right byte order */
181 req->crq.s.status = 0x99; /* Just needs to be non-zero */
183 req->crq.s.status = 0x00;
186 rc1 = spapr_vio_send_crq(&s->vdev, req->crq.raw);
188 fprintf(stderr, "vscsi_send_iu: Error sending response\n");
195 static void vscsi_makeup_sense(VSCSIState *s, vscsi_req *req,
196 uint8_t key, uint8_t asc, uint8_t ascq)
198 req->senselen = SRP_RSP_SENSE_DATA_LEN;
200 /* Valid bit and 'current errors' */
201 req->sense[0] = (0x1 << 7 | 0x70);
204 /* Additional sense length */
205 req->sense[7] = 0xa; /* 10 bytes */
206 /* Additional sense code */
207 req->sense[12] = asc;
208 req->sense[13] = ascq;
211 static int vscsi_send_rsp(VSCSIState *s, vscsi_req *req,
212 uint8_t status, int32_t res_in, int32_t res_out)
214 union viosrp_iu *iu = &req->iu;
215 uint64_t tag = iu->srp.rsp.tag;
216 int total_len = sizeof(iu->srp.rsp);
218 dprintf("VSCSI: Sending resp status: 0x%x, "
219 "res_in: %d, res_out: %d\n", status, res_in, res_out);
221 memset(iu, 0, sizeof(struct srp_rsp));
222 iu->srp.rsp.opcode = SRP_RSP;
223 iu->srp.rsp.req_lim_delta = cpu_to_be32(1);
224 iu->srp.rsp.tag = tag;
226 /* Handle residuals */
228 iu->srp.rsp.flags |= SRP_RSP_FLAG_DIUNDER;
231 iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER;
234 iu->srp.rsp.flags |= SRP_RSP_FLAG_DOUNDER;
236 } else if (res_out) {
237 iu->srp.rsp.flags |= SRP_RSP_FLAG_DOOVER;
239 iu->srp.rsp.data_in_res_cnt = cpu_to_be32(res_in);
240 iu->srp.rsp.data_out_res_cnt = cpu_to_be32(res_out);
242 /* We don't do response data */
243 /* iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; */
244 iu->srp.rsp.resp_data_len = cpu_to_be32(0);
246 /* Handle success vs. failure */
247 iu->srp.rsp.status = status;
249 iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x04) >> 2;
251 req->iu.srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID;
252 req->iu.srp.rsp.sense_data_len = cpu_to_be32(req->senselen);
253 memcpy(req->iu.srp.rsp.data, req->sense, req->senselen);
254 total_len += req->senselen;
257 iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x02) >> 1;
260 vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT);
264 static inline void vscsi_swap_desc(struct srp_direct_buf *desc)
266 desc->va = be64_to_cpu(desc->va);
267 desc->len = be32_to_cpu(desc->len);
270 static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req,
271 uint8_t *buf, uint32_t len)
273 struct srp_direct_buf *md = req->cur_desc;
277 dprintf("VSCSI: direct segment 0x%x bytes, va=0x%llx desc len=0x%x\n",
278 len, (unsigned long long)md->va, md->len);
280 llen = MIN(len, md->len);
282 if (req->writing) { /* writing = to device = reading from memory */
283 rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen);
285 rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen);
297 static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req,
298 uint8_t *buf, uint32_t len)
300 struct srp_direct_buf *td = &req->ind_desc->table_desc;
301 struct srp_direct_buf *md = req->cur_desc;
303 uint32_t llen, total = 0;
305 dprintf("VSCSI: indirect segment 0x%x bytes, td va=0x%llx len=0x%x\n",
306 len, (unsigned long long)td->va, td->len);
308 /* While we have data ... */
310 /* If we have a descriptor but it's empty, go fetch a new one */
311 if (md && md->len == 0) {
312 /* More local available, use one */
313 if (req->local_desc) {
314 md = ++req->cur_desc;
317 td->va += sizeof(struct srp_direct_buf);
319 md = req->cur_desc = NULL;
322 /* No descriptor at hand, fetch one */
324 if (!req->total_desc) {
325 dprintf("VSCSI: Out of descriptors !\n");
328 md = req->cur_desc = &req->ext_desc;
329 dprintf("VSCSI: Reading desc from 0x%llx\n",
330 (unsigned long long)td->va);
331 rc = spapr_vio_dma_read(&s->vdev, td->va, md,
332 sizeof(struct srp_direct_buf));
334 dprintf("VSCSI: spapr_vio_dma_read -> %d reading ext_desc\n",
339 td->va += sizeof(struct srp_direct_buf);
342 dprintf("VSCSI: [desc va=0x%llx,len=0x%x] remaining=0x%x\n",
343 (unsigned long long)md->va, md->len, len);
345 /* Perform transfer */
346 llen = MIN(len, md->len);
347 if (req->writing) { /* writing = to device = reading from memory */
348 rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen);
350 rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen);
353 dprintf("VSCSI: spapr_vio_dma_r/w(%d) -> %d\n", req->writing, rc);
356 dprintf("VSCSI: data: %02x %02x %02x %02x...\n",
357 buf[0], buf[1], buf[2], buf[3]);
365 return rc ? -1 : total;
368 static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req,
369 int writing, uint8_t *buf, uint32_t len)
373 switch (req->dma_fmt) {
374 case SRP_NO_DATA_DESC:
375 dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len);
377 case SRP_DATA_DESC_DIRECT:
378 err = vscsi_srp_direct_data(s, req, buf, len);
380 case SRP_DATA_DESC_INDIRECT:
381 err = vscsi_srp_indirect_data(s, req, buf, len);
387 /* Bits from linux srp */
388 static int data_out_desc_size(struct srp_cmd *cmd)
391 uint8_t fmt = cmd->buf_fmt >> 4;
394 case SRP_NO_DATA_DESC:
396 case SRP_DATA_DESC_DIRECT:
397 size = sizeof(struct srp_direct_buf);
399 case SRP_DATA_DESC_INDIRECT:
400 size = sizeof(struct srp_indirect_buf) +
401 sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt;
409 static int vscsi_preprocess_desc(vscsi_req *req)
411 struct srp_cmd *cmd = &req->iu.srp.cmd;
414 offset = cmd->add_cdb_len & ~3;
417 req->dma_fmt = cmd->buf_fmt >> 4;
419 offset += data_out_desc_size(cmd);
420 req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1);
423 switch (req->dma_fmt) {
424 case SRP_NO_DATA_DESC:
426 case SRP_DATA_DESC_DIRECT:
427 req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset);
428 req->total_desc = req->local_desc = 1;
429 vscsi_swap_desc(req->cur_desc);
430 dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n",
431 req->writing ? "write" : "read",
432 req->cur_desc->len, (unsigned long long)req->cur_desc->va);
434 case SRP_DATA_DESC_INDIRECT:
435 req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset);
436 vscsi_swap_desc(&req->ind_desc->table_desc);
437 req->total_desc = req->ind_desc->table_desc.len /
438 sizeof(struct srp_direct_buf);
439 req->local_desc = req->writing ? cmd->data_out_desc_cnt :
440 cmd->data_in_desc_cnt;
441 for (i = 0; i < req->local_desc; i++) {
442 vscsi_swap_desc(&req->ind_desc->desc_list[i]);
444 req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL;
445 dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs "
446 "(%d local) VA: 0x%llx\n",
447 req->writing ? "read" : "write",
448 be32_to_cpu(req->ind_desc->len),
449 req->total_desc, req->local_desc,
450 (unsigned long long)req->ind_desc->table_desc.va);
454 "vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt);
461 /* Callback to indicate that the SCSI layer has completed a transfer. */
462 static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len)
464 VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
465 vscsi_req *req = sreq->hba_private;
469 dprintf("VSCSI: SCSI xfer complete tag=0x%x len=0x%x, req=%p\n",
470 sreq->tag, len, req);
472 fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
477 buf = scsi_req_get_buf(sreq);
478 rc = vscsi_srp_transfer_data(s, req, req->writing, buf, len);
481 fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
482 vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
483 scsi_req_abort(req->sreq, CHECK_CONDITION);
487 /* Start next chunk */
489 scsi_req_continue(sreq);
492 /* Callback to indicate that the SCSI layer has completed a transfer. */
493 static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status, size_t resid)
495 VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
496 vscsi_req *req = sreq->hba_private;
497 int32_t res_in = 0, res_out = 0;
499 dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x status=0x%x, req=%p\n",
500 reason, sreq->tag, status, req);
502 fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
506 if (status == CHECK_CONDITION) {
507 req->senselen = scsi_req_get_sense(req->sreq, req->sense,
509 dprintf("VSCSI: Sense data, %d bytes:\n", len);
510 dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
511 req->sense[0], req->sense[1], req->sense[2], req->sense[3],
512 req->sense[4], req->sense[5], req->sense[6], req->sense[7]);
513 dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
514 req->sense[8], req->sense[9], req->sense[10], req->sense[11],
515 req->sense[12], req->sense[13], req->sense[14], req->sense[15]);
518 dprintf("VSCSI: Command complete err=%d\n", status);
520 /* We handle overflows, not underflows for normal commands,
521 * but hopefully nobody cares
524 res_out = req->data_len;
526 res_in = req->data_len;
529 vscsi_send_rsp(s, req, status, res_in, res_out);
533 static void vscsi_request_cancelled(SCSIRequest *sreq)
535 vscsi_req *req = sreq->hba_private;
540 static void vscsi_process_login(VSCSIState *s, vscsi_req *req)
542 union viosrp_iu *iu = &req->iu;
543 struct srp_login_rsp *rsp = &iu->srp.login_rsp;
544 uint64_t tag = iu->srp.rsp.tag;
546 dprintf("VSCSI: Got login, sendin response !\n");
548 /* TODO handle case that requested size is wrong and
549 * buffer format is wrong
551 memset(iu, 0, sizeof(struct srp_login_rsp));
552 rsp->opcode = SRP_LOGIN_RSP;
553 /* Don't advertise quite as many request as we support to
554 * keep room for management stuff etc...
556 rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2);
558 rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu));
559 rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu));
560 /* direct and indirect */
561 rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT);
563 vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT);
566 static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req)
568 uint8_t *cdb = req->iu.srp.cmd.cdb;
569 uint8_t resp_data[36];
572 /* We dont do EVPD. Also check that page_code is 0 */
573 if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) {
574 /* Send INVALID FIELD IN CDB */
575 vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0);
576 vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
580 alen = (alen << 8) | cdb[4];
583 /* Fake up inquiry using PQ=3 */
584 memset(resp_data, 0, 36);
585 resp_data[0] = 0x7f; /* Not capable of supporting a device here */
586 resp_data[2] = 0x06; /* SPS-4 */
587 resp_data[3] = 0x02; /* Resp data format */
588 resp_data[4] = 36 - 5; /* Additional length */
589 resp_data[7] = 0x10; /* Sync transfers */
590 memcpy(&resp_data[16], "QEMU EMPTY ", 16);
591 memcpy(&resp_data[8], "QEMU ", 8);
594 vscsi_preprocess_desc(req);
595 rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len);
597 vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
598 vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
600 vscsi_send_rsp(s, req, 0, 36 - rc, 0);
604 static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req)
606 union srp_iu *srp = &req->iu.srp;
610 sdev = vscsi_device_find(&s->bus, be64_to_cpu(srp->cmd.lun), &lun);
612 dprintf("VSCSI: Command for lun %08" PRIx64 " with no drive\n", be64_to_cpu(srp->cmd.lun));
613 if (srp->cmd.cdb[0] == INQUIRY) {
614 vscsi_inquiry_no_target(s, req);
616 vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00);
617 vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
622 req->sreq = scsi_req_new(sdev, req->qtag, lun, srp->cmd.cdb, req);
623 n = scsi_req_enqueue(req->sreq);
625 dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
626 req->qtag, srp->cmd.cdb[0], id, lun, n);
629 /* Transfer direction must be set before preprocessing the
632 req->writing = (n < 1);
634 /* Preprocess RDMA descriptors */
635 vscsi_preprocess_desc(req);
637 /* Get transfer direction and initiate transfer */
643 scsi_req_continue(req->sreq);
645 /* Don't touch req here, it may have been recycled already */
650 static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req)
652 union viosrp_iu *iu = &req->iu;
655 fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
656 iu->srp.tsk_mgmt.tsk_mgmt_func);
658 switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
659 #if 0 /* We really don't deal with these for now */
660 case SRP_TSK_ABORT_TASK:
663 case SRP_TSK_ABORT_TASK_SET:
666 case SRP_TSK_CLEAR_TASK_SET:
669 case SRP_TSK_LUN_RESET:
670 fn = LOGICAL_UNIT_RESET;
672 case SRP_TSK_CLEAR_ACA:
680 /* XXX Send/Handle target task management */
683 vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0);
684 vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
689 static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req)
691 union srp_iu *srp = &req->iu.srp;
693 uint8_t opcode = srp->rsp.opcode;
697 vscsi_process_login(s, req);
700 done = vscsi_process_tsk_mgmt(s, req);
703 done = vscsi_queue_cmd(s, req);
713 fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode);
716 fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode);
722 static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req)
724 struct viosrp_adapter_info *sinfo;
725 struct mad_adapter_info_data info;
728 sinfo = &req->iu.mad.adapter_info;
730 #if 0 /* What for ? */
731 rc = spapr_vio_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
732 &info, be16_to_cpu(sinfo->common.length));
734 fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
737 memset(&info, 0, sizeof(info));
738 strcpy(info.srp_version, SRP_VERSION);
739 memcpy(info.partition_name, "qemu", sizeof("qemu"));
740 info.partition_number = cpu_to_be32(0);
741 info.mad_version = cpu_to_be32(1);
742 info.os_type = cpu_to_be32(2);
743 info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9);
745 rc = spapr_vio_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer),
746 &info, be16_to_cpu(sinfo->common.length));
748 fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
751 sinfo->common.status = rc ? cpu_to_be32(1) : 0;
753 return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT);
756 static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req)
758 union mad_iu *mad = &req->iu.mad;
760 switch (be32_to_cpu(mad->empty_iu.common.type)) {
761 case VIOSRP_EMPTY_IU_TYPE:
762 fprintf(stderr, "Unsupported EMPTY MAD IU\n");
764 case VIOSRP_ERROR_LOG_TYPE:
765 fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
766 mad->error_log.common.status = cpu_to_be16(1);
767 vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
769 case VIOSRP_ADAPTER_INFO_TYPE:
770 vscsi_send_adapter_info(s, req);
772 case VIOSRP_HOST_CONFIG_TYPE:
773 mad->host_config.common.status = cpu_to_be16(1);
774 vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
777 fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
778 be32_to_cpu(mad->empty_iu.common.type));
784 static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq)
789 req = vscsi_get_req(s);
791 fprintf(stderr, "VSCSI: Failed to get a request !\n");
795 /* We only support a limited number of descriptors, we know
796 * the ibmvscsi driver uses up to 10 max, so it should fit
797 * in our 256 bytes IUs. If not we'll have to increase the size
800 if (crq->s.IU_length > sizeof(union viosrp_iu)) {
801 fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
807 /* XXX Handle failure differently ? */
808 if (spapr_vio_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
810 fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
814 memcpy(&req->crq, crq, sizeof(vscsi_crq));
816 if (crq->s.format == VIOSRP_MAD_FORMAT) {
817 done = vscsi_handle_mad_req(s, req);
819 done = vscsi_handle_srp_req(s, req);
828 static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data)
830 VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev);
833 memcpy(crq.raw, crq_data, 16);
834 crq.s.timeout = be16_to_cpu(crq.s.timeout);
835 crq.s.IU_length = be16_to_cpu(crq.s.IU_length);
836 crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr);
838 dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]);
840 switch (crq.s.valid) {
841 case 0xc0: /* Init command/response */
843 /* Respond to initialization request */
844 if (crq.s.format == 0x01) {
845 memset(crq.raw, 0, 16);
848 spapr_vio_send_crq(dev, crq.raw);
851 /* Note that in hotplug cases, we might get a 0x02
852 * as a result of us emitting the init request
856 case 0xff: /* Link event */
858 /* Not handled for now */
861 case 0x80: /* Payloads */
862 switch (crq.s.format) {
863 case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */
864 case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */
865 vscsi_got_payload(s, &crq);
867 case VIOSRP_OS400_FORMAT:
868 case VIOSRP_AIX_FORMAT:
869 case VIOSRP_LINUX_FORMAT:
870 case VIOSRP_INLINE_FORMAT:
871 fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n",
875 fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n",
880 fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n",
881 crq.raw[0], crq.raw[1]);
887 static const struct SCSIBusInfo vscsi_scsi_info = {
889 .max_channel = 7, /* logical unit addressing format */
893 .transfer_data = vscsi_transfer_data,
894 .complete = vscsi_command_complete,
895 .cancel = vscsi_request_cancelled
898 static void spapr_vscsi_reset(VIOsPAPRDevice *dev)
900 VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev);
903 memset(s->reqs, 0, sizeof(s->reqs));
904 for (i = 0; i < VSCSI_REQ_LIMIT; i++) {
909 static int spapr_vscsi_init(VIOsPAPRDevice *dev)
911 VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev);
913 dev->crq.SendFunc = vscsi_do_crq;
915 scsi_bus_new(&s->bus, &dev->qdev, &vscsi_scsi_info);
916 if (!dev->qdev.hotplugged) {
917 scsi_bus_legacy_handle_cmdline(&s->bus);
923 void spapr_vscsi_create(VIOsPAPRBus *bus)
927 dev = qdev_create(&bus->bus, "spapr-vscsi");
929 qdev_init_nofail(dev);
932 static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off)
936 ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2);
941 ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0);
949 static Property spapr_vscsi_properties[] = {
950 DEFINE_SPAPR_PROPERTIES(VSCSIState, vdev),
951 DEFINE_PROP_END_OF_LIST(),
954 static void spapr_vscsi_class_init(ObjectClass *klass, void *data)
956 DeviceClass *dc = DEVICE_CLASS(klass);
957 VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
959 k->init = spapr_vscsi_init;
960 k->reset = spapr_vscsi_reset;
961 k->devnode = spapr_vscsi_devnode;
962 k->dt_name = "v-scsi";
963 k->dt_type = "vscsi";
964 k->dt_compatible = "IBM,v-scsi";
965 k->signal_mask = 0x00000001;
966 dc->props = spapr_vscsi_properties;
967 k->rtce_window_size = 0x10000000;
970 static TypeInfo spapr_vscsi_info = {
971 .name = "spapr-vscsi",
972 .parent = TYPE_VIO_SPAPR_DEVICE,
973 .instance_size = sizeof(VSCSIState),
974 .class_init = spapr_vscsi_class_init,
977 static void spapr_vscsi_register_types(void)
979 type_register_static(&spapr_vscsi_info);
982 type_init(spapr_vscsi_register_types)