/* * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator * * PAPR Virtual SCSI, aka ibmvscsi * * Copyright (c) 2010,2011 Benjamin Herrenschmidt, IBM Corporation. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * TODO: * * - Cleanups :-) * - Sort out better how to assign devices to VSCSI instances * - Fix residual counts * - Add indirect descriptors support * - Maybe do autosense (PAPR seems to mandate it, linux doesn't care) */ #include "hw.h" #include "scsi.h" #include "scsi-defs.h" #include "net.h" /* Remove that when we can */ #include "srp.h" #include "hw/qdev.h" #include "hw/spapr.h" #include "hw/spapr_vio.h" #include "hw/ppc-viosrp.h" #include /*#define DEBUG_VSCSI*/ #ifdef DEBUG_VSCSI #define dprintf(fmt, ...) \ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) #else #define dprintf(fmt, ...) \ do { } while (0) #endif /* * Virtual SCSI device */ /* Random numbers */ #define VSCSI_MAX_SECTORS 4096 #define VSCSI_REQ_LIMIT 24 #define SCSI_SENSE_BUF_SIZE 96 #define SRP_RSP_SENSE_DATA_LEN 18 typedef union vscsi_crq { struct viosrp_crq s; uint8_t raw[16]; } vscsi_crq; typedef struct vscsi_req { vscsi_crq crq; union viosrp_iu iu; /* SCSI request tracking */ SCSIRequest *sreq; uint32_t qtag; /* qemu tag != srp tag */ int lun; int active; long data_len; int writing; int sensing; int senselen; uint8_t sense[SCSI_SENSE_BUF_SIZE]; /* RDMA related bits */ uint8_t dma_fmt; struct srp_direct_buf ext_desc; struct srp_direct_buf *cur_desc; struct srp_indirect_buf *ind_desc; int local_desc; int total_desc; } vscsi_req; typedef struct { VIOsPAPRDevice vdev; SCSIBus bus; vscsi_req reqs[VSCSI_REQ_LIMIT]; } VSCSIState; /* XXX Debug only */ static VSCSIState *dbg_vscsi_state; static struct vscsi_req *vscsi_get_req(VSCSIState *s) { vscsi_req *req; int i; for (i = 0; i < VSCSI_REQ_LIMIT; i++) { req = &s->reqs[i]; if (!req->active) { memset(req, 0, sizeof(*req)); req->qtag = i; req->active = 1; return req; } } return NULL; } static void vscsi_put_req(VSCSIState *s, vscsi_req *req) { if (req->sreq != NULL) { scsi_req_unref(req->sreq); } req->sreq = NULL; req->active = 0; } static vscsi_req *vscsi_find_req(VSCSIState *s, SCSIRequest *req) { uint32_t tag = req->tag; if (tag >= VSCSI_REQ_LIMIT || !s->reqs[tag].active) { return NULL; } return &s->reqs[tag]; } static void vscsi_decode_id_lun(uint64_t srp_lun, int *id, int *lun) { /* XXX Figure that one out properly ! This is crackpot */ *id = (srp_lun >> 56) & 0x7f; *lun = (srp_lun >> 48) & 0xff; } static int vscsi_send_iu(VSCSIState *s, vscsi_req *req, uint64_t length, uint8_t format) { long rc, rc1; /* First copy the SRP */ rc = spapr_tce_dma_write(&s->vdev, req->crq.s.IU_data_ptr, &req->iu, length); if (rc) { fprintf(stderr, "vscsi_send_iu: DMA write failure !\n"); } req->crq.s.valid = 0x80; req->crq.s.format = format; req->crq.s.reserved = 0x00; req->crq.s.timeout = cpu_to_be16(0x0000); req->crq.s.IU_length = cpu_to_be16(length); req->crq.s.IU_data_ptr = req->iu.srp.rsp.tag; /* right byte order */ if (rc == 0) { req->crq.s.status = 0x99; /* Just needs to be non-zero */ } else { req->crq.s.status = 0x00; } rc1 = spapr_vio_send_crq(&s->vdev, req->crq.raw); if (rc1) { fprintf(stderr, "vscsi_send_iu: Error sending response\n"); return rc1; } return rc; } static void vscsi_makeup_sense(VSCSIState *s, vscsi_req *req, uint8_t key, uint8_t asc, uint8_t ascq) { req->senselen = SRP_RSP_SENSE_DATA_LEN; /* Valid bit and 'current errors' */ req->sense[0] = (0x1 << 7 | 0x70); /* Sense key */ req->sense[2] = key; /* Additional sense length */ req->sense[7] = 0xa; /* 10 bytes */ /* Additional sense code */ req->sense[12] = asc; req->sense[13] = ascq; } static int vscsi_send_rsp(VSCSIState *s, vscsi_req *req, uint8_t status, int32_t res_in, int32_t res_out) { union viosrp_iu *iu = &req->iu; uint64_t tag = iu->srp.rsp.tag; int total_len = sizeof(iu->srp.rsp); dprintf("VSCSI: Sending resp status: 0x%x, " "res_in: %d, res_out: %d\n", status, res_in, res_out); memset(iu, 0, sizeof(struct srp_rsp)); iu->srp.rsp.opcode = SRP_RSP; iu->srp.rsp.req_lim_delta = cpu_to_be32(1); iu->srp.rsp.tag = tag; /* Handle residuals */ if (res_in < 0) { iu->srp.rsp.flags |= SRP_RSP_FLAG_DIUNDER; res_in = -res_in; } else if (res_in) { iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER; } if (res_out < 0) { iu->srp.rsp.flags |= SRP_RSP_FLAG_DOUNDER; res_out = -res_out; } else if (res_out) { iu->srp.rsp.flags |= SRP_RSP_FLAG_DOOVER; } iu->srp.rsp.data_in_res_cnt = cpu_to_be32(res_in); iu->srp.rsp.data_out_res_cnt = cpu_to_be32(res_out); /* We don't do response data */ /* iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; */ iu->srp.rsp.resp_data_len = cpu_to_be32(0); /* Handle success vs. failure */ iu->srp.rsp.status = status; if (status) { iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x04) >> 2; if (req->senselen) { req->iu.srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID; req->iu.srp.rsp.sense_data_len = cpu_to_be32(req->senselen); memcpy(req->iu.srp.rsp.data, req->sense, req->senselen); total_len += req->senselen; } } else { iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x02) >> 1; } vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT); return 0; } static inline void vscsi_swap_desc(struct srp_direct_buf *desc) { desc->va = be64_to_cpu(desc->va); desc->len = be32_to_cpu(desc->len); } static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req, uint8_t *buf, uint32_t len) { struct srp_direct_buf *md = req->cur_desc; uint32_t llen; int rc = 0; dprintf("VSCSI: direct segment 0x%x bytes, va=0x%llx desc len=0x%x\n", len, (unsigned long long)md->va, md->len); llen = MIN(len, md->len); if (llen) { if (req->writing) { /* writing = to device = reading from memory */ rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen); } else { rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen); } } md->len -= llen; md->va += llen; if (rc) { return -1; } return llen; } static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req, uint8_t *buf, uint32_t len) { struct srp_direct_buf *td = &req->ind_desc->table_desc; struct srp_direct_buf *md = req->cur_desc; int rc = 0; uint32_t llen, total = 0; dprintf("VSCSI: indirect segment 0x%x bytes, td va=0x%llx len=0x%x\n", len, (unsigned long long)td->va, td->len); /* While we have data ... */ while (len) { /* If we have a descriptor but it's empty, go fetch a new one */ if (md && md->len == 0) { /* More local available, use one */ if (req->local_desc) { md = ++req->cur_desc; --req->local_desc; --req->total_desc; td->va += sizeof(struct srp_direct_buf); } else { md = req->cur_desc = NULL; } } /* No descriptor at hand, fetch one */ if (!md) { if (!req->total_desc) { dprintf("VSCSI: Out of descriptors !\n"); break; } md = req->cur_desc = &req->ext_desc; dprintf("VSCSI: Reading desc from 0x%llx\n", (unsigned long long)td->va); rc = spapr_tce_dma_read(&s->vdev, td->va, md, sizeof(struct srp_direct_buf)); if (rc) { dprintf("VSCSI: tce_dma_read -> %d reading ext_desc\n", rc); break; } vscsi_swap_desc(md); td->va += sizeof(struct srp_direct_buf); --req->total_desc; } dprintf("VSCSI: [desc va=0x%llx,len=0x%x] remaining=0x%x\n", (unsigned long long)md->va, md->len, len); /* Perform transfer */ llen = MIN(len, md->len); if (req->writing) { /* writing = to device = reading from memory */ rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen); } else { rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen); } if (rc) { dprintf("VSCSI: tce_dma_r/w(%d) -> %d\n", req->writing, rc); break; } dprintf("VSCSI: data: %02x %02x %02x %02x...\n", buf[0], buf[1], buf[2], buf[3]); len -= llen; buf += llen; total += llen; md->va += llen; md->len -= llen; } return rc ? -1 : total; } static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req, int writing, uint8_t *buf, uint32_t len) { int err = 0; switch (req->dma_fmt) { case SRP_NO_DATA_DESC: dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len); break; case SRP_DATA_DESC_DIRECT: err = vscsi_srp_direct_data(s, req, buf, len); break; case SRP_DATA_DESC_INDIRECT: err = vscsi_srp_indirect_data(s, req, buf, len); break; } return err; } /* Bits from linux srp */ static int data_out_desc_size(struct srp_cmd *cmd) { int size = 0; uint8_t fmt = cmd->buf_fmt >> 4; switch (fmt) { case SRP_NO_DATA_DESC: break; case SRP_DATA_DESC_DIRECT: size = sizeof(struct srp_direct_buf); break; case SRP_DATA_DESC_INDIRECT: size = sizeof(struct srp_indirect_buf) + sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt; break; default: break; } return size; } static int vscsi_preprocess_desc(vscsi_req *req) { struct srp_cmd *cmd = &req->iu.srp.cmd; int offset, i; offset = cmd->add_cdb_len & ~3; if (req->writing) { req->dma_fmt = cmd->buf_fmt >> 4; } else { offset += data_out_desc_size(cmd); req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1); } switch (req->dma_fmt) { case SRP_NO_DATA_DESC: break; case SRP_DATA_DESC_DIRECT: req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset); req->total_desc = req->local_desc = 1; vscsi_swap_desc(req->cur_desc); dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n", req->writing ? "write" : "read", req->cur_desc->len, (unsigned long long)req->cur_desc->va); break; case SRP_DATA_DESC_INDIRECT: req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset); vscsi_swap_desc(&req->ind_desc->table_desc); req->total_desc = req->ind_desc->table_desc.len / sizeof(struct srp_direct_buf); req->local_desc = req->writing ? cmd->data_out_desc_cnt : cmd->data_in_desc_cnt; for (i = 0; i < req->local_desc; i++) { vscsi_swap_desc(&req->ind_desc->desc_list[i]); } req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL; dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs " "(%d local) VA: 0x%llx\n", req->writing ? "read" : "write", be32_to_cpu(req->ind_desc->len), req->total_desc, req->local_desc, (unsigned long long)req->ind_desc->table_desc.va); break; default: fprintf(stderr, "vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt); return -1; } return 0; } static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req) { uint8_t *cdb = req->iu.srp.cmd.cdb; int n; n = scsi_req_get_sense(req->sreq, req->sense, sizeof(req->sense)); if (n) { req->senselen = n; vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); vscsi_put_req(s, req); return; } dprintf("VSCSI: Got CHECK_CONDITION, requesting sense...\n"); cdb[0] = 3; cdb[1] = 0; cdb[2] = 0; cdb[3] = 0; cdb[4] = 96; cdb[5] = 0; req->sensing = 1; n = scsi_req_enqueue(req->sreq, cdb); dprintf("VSCSI: Queued request sense tag 0x%x\n", req->qtag); if (n < 0) { fprintf(stderr, "VSCSI: REQUEST_SENSE wants write data !?!?!?\n"); vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); scsi_req_abort(req->sreq, CHECK_CONDITION); return; } else if (n == 0) { return; } scsi_req_continue(req->sreq); } /* Callback to indicate that the SCSI layer has completed a transfer. */ static void vscsi_command_complete(SCSIRequest *sreq, int reason, uint32_t arg) { VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); vscsi_req *req = vscsi_find_req(s, sreq); uint8_t *buf; int32_t res_in = 0, res_out = 0; int len, rc = 0; dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x arg=0x%x, req=%p\n", reason, sreq->tag, arg, req); if (req == NULL) { fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag); return; } if (req->sensing) { if (reason == SCSI_REASON_DONE) { dprintf("VSCSI: Sense done !\n"); vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); vscsi_put_req(s, req); } else { uint8_t *buf = scsi_req_get_buf(sreq); len = MIN(arg, SCSI_SENSE_BUF_SIZE); dprintf("VSCSI: Sense data, %d bytes:\n", len); dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]); dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n", buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]); memcpy(req->sense, buf, len); req->senselen = len; scsi_req_continue(req->sreq); } return; } if (reason == SCSI_REASON_DONE) { dprintf("VSCSI: Command complete err=%d\n", arg); if (arg == 0) { /* We handle overflows, not underflows for normal commands, * but hopefully nobody cares */ if (req->writing) { res_out = req->data_len; } else { res_in = req->data_len; } vscsi_send_rsp(s, req, 0, res_in, res_out); } else if (arg == CHECK_CONDITION) { vscsi_send_request_sense(s, req); return; } else { vscsi_send_rsp(s, req, arg, 0, 0); } vscsi_put_req(s, req); return; } /* "arg" is how much we have read for reads and how much we want * to write for writes (ie, how much is to be DMA'd) */ if (arg) { buf = scsi_req_get_buf(sreq); rc = vscsi_srp_transfer_data(s, req, req->writing, buf, arg); } if (rc < 0) { fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc); vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); scsi_req_abort(req->sreq, CHECK_CONDITION); return; } /* Start next chunk */ req->data_len -= rc; scsi_req_continue(sreq); } static void vscsi_request_cancelled(SCSIRequest *sreq) { VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); vscsi_req *req = vscsi_find_req(s, sreq); vscsi_put_req(s, req); } static void vscsi_process_login(VSCSIState *s, vscsi_req *req) { union viosrp_iu *iu = &req->iu; struct srp_login_rsp *rsp = &iu->srp.login_rsp; uint64_t tag = iu->srp.rsp.tag; dprintf("VSCSI: Got login, sendin response !\n"); /* TODO handle case that requested size is wrong and * buffer format is wrong */ memset(iu, 0, sizeof(struct srp_login_rsp)); rsp->opcode = SRP_LOGIN_RSP; /* Don't advertise quite as many request as we support to * keep room for management stuff etc... */ rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2); rsp->tag = tag; rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu)); rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu)); /* direct and indirect */ rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT); } static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req) { uint8_t *cdb = req->iu.srp.cmd.cdb; uint8_t resp_data[36]; int rc, len, alen; /* We dont do EVPD. Also check that page_code is 0 */ if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) { /* Send INVALID FIELD IN CDB */ vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0); vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); return; } alen = cdb[3]; alen = (alen << 8) | cdb[4]; len = MIN(alen, 36); /* Fake up inquiry using PQ=3 */ memset(resp_data, 0, 36); resp_data[0] = 0x7f; /* Not capable of supporting a device here */ resp_data[2] = 0x06; /* SPS-4 */ resp_data[3] = 0x02; /* Resp data format */ resp_data[4] = 36 - 5; /* Additional length */ resp_data[7] = 0x10; /* Sync transfers */ memcpy(&resp_data[16], "QEMU EMPTY ", 16); memcpy(&resp_data[8], "QEMU ", 8); req->writing = 0; vscsi_preprocess_desc(req); rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len); if (rc < 0) { vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); } else { vscsi_send_rsp(s, req, 0, 36 - rc, 0); } } static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req) { union srp_iu *srp = &req->iu.srp; SCSIDevice *sdev; int n, id, lun; vscsi_decode_id_lun(be64_to_cpu(srp->cmd.lun), &id, &lun); /* Qemu vs. linux issue with LUNs to be sorted out ... */ sdev = (id < 8 && lun < 16) ? s->bus.devs[id] : NULL; if (!sdev) { dprintf("VSCSI: Command for id %d with no drive\n", id); if (srp->cmd.cdb[0] == INQUIRY) { vscsi_inquiry_no_target(s, req); } else { vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00); vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); } return 1; } req->lun = lun; req->sreq = scsi_req_new(sdev, req->qtag, lun); n = scsi_req_enqueue(req->sreq, srp->cmd.cdb); dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n", req->qtag, srp->cmd.cdb[0], id, lun, n); if (n) { /* Transfer direction must be set before preprocessing the * descriptors */ req->writing = (n < 1); /* Preprocess RDMA descriptors */ vscsi_preprocess_desc(req); /* Get transfer direction and initiate transfer */ if (n > 0) { req->data_len = n; } else if (n < 0) { req->data_len = -n; } scsi_req_continue(req->sreq); } /* Don't touch req here, it may have been recycled already */ return 0; } static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req) { union viosrp_iu *iu = &req->iu; int fn; fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n", iu->srp.tsk_mgmt.tsk_mgmt_func); switch (iu->srp.tsk_mgmt.tsk_mgmt_func) { #if 0 /* We really don't deal with these for now */ case SRP_TSK_ABORT_TASK: fn = ABORT_TASK; break; case SRP_TSK_ABORT_TASK_SET: fn = ABORT_TASK_SET; break; case SRP_TSK_CLEAR_TASK_SET: fn = CLEAR_TASK_SET; break; case SRP_TSK_LUN_RESET: fn = LOGICAL_UNIT_RESET; break; case SRP_TSK_CLEAR_ACA: fn = CLEAR_ACA; break; #endif default: fn = 0; } if (fn) { /* XXX Send/Handle target task management */ ; } else { vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0); vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); } return !fn; } static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req) { union srp_iu *srp = &req->iu.srp; int done = 1; uint8_t opcode = srp->rsp.opcode; switch (opcode) { case SRP_LOGIN_REQ: vscsi_process_login(s, req); break; case SRP_TSK_MGMT: done = vscsi_process_tsk_mgmt(s, req); break; case SRP_CMD: done = vscsi_queue_cmd(s, req); break; case SRP_LOGIN_RSP: case SRP_I_LOGOUT: case SRP_T_LOGOUT: case SRP_RSP: case SRP_CRED_REQ: case SRP_CRED_RSP: case SRP_AER_REQ: case SRP_AER_RSP: fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode); break; default: fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode); } return done; } static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req) { struct viosrp_adapter_info *sinfo; struct mad_adapter_info_data info; int rc; sinfo = &req->iu.mad.adapter_info; #if 0 /* What for ? */ rc = spapr_tce_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer), &info, be16_to_cpu(sinfo->common.length)); if (rc) { fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n"); } #endif memset(&info, 0, sizeof(info)); strcpy(info.srp_version, SRP_VERSION); strncpy(info.partition_name, "qemu", sizeof("qemu")); info.partition_number = cpu_to_be32(0); info.mad_version = cpu_to_be32(1); info.os_type = cpu_to_be32(2); info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9); rc = spapr_tce_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer), &info, be16_to_cpu(sinfo->common.length)); if (rc) { fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n"); } sinfo->common.status = rc ? cpu_to_be32(1) : 0; return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT); } static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req) { union mad_iu *mad = &req->iu.mad; switch (be32_to_cpu(mad->empty_iu.common.type)) { case VIOSRP_EMPTY_IU_TYPE: fprintf(stderr, "Unsupported EMPTY MAD IU\n"); break; case VIOSRP_ERROR_LOG_TYPE: fprintf(stderr, "Unsupported ERROR LOG MAD IU\n"); mad->error_log.common.status = cpu_to_be16(1); vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT); break; case VIOSRP_ADAPTER_INFO_TYPE: vscsi_send_adapter_info(s, req); break; case VIOSRP_HOST_CONFIG_TYPE: mad->host_config.common.status = cpu_to_be16(1); vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT); break; default: fprintf(stderr, "VSCSI: Unknown MAD type %02x\n", be32_to_cpu(mad->empty_iu.common.type)); } return 1; } static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq) { vscsi_req *req; int done; req = vscsi_get_req(s); if (req == NULL) { fprintf(stderr, "VSCSI: Failed to get a request !\n"); return; } /* We only support a limited number of descriptors, we know * the ibmvscsi driver uses up to 10 max, so it should fit * in our 256 bytes IUs. If not we'll have to increase the size * of the structure. */ if (crq->s.IU_length > sizeof(union viosrp_iu)) { fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n", crq->s.IU_length); return; } /* XXX Handle failure differently ? */ if (spapr_tce_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu, crq->s.IU_length)) { fprintf(stderr, "vscsi_got_payload: DMA read failure !\n"); qemu_free(req); } memcpy(&req->crq, crq, sizeof(vscsi_crq)); if (crq->s.format == VIOSRP_MAD_FORMAT) { done = vscsi_handle_mad_req(s, req); } else { done = vscsi_handle_srp_req(s, req); } if (done) { vscsi_put_req(s, req); } } static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) { VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); vscsi_crq crq; memcpy(crq.raw, crq_data, 16); crq.s.timeout = be16_to_cpu(crq.s.timeout); crq.s.IU_length = be16_to_cpu(crq.s.IU_length); crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr); dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]); switch (crq.s.valid) { case 0xc0: /* Init command/response */ /* Respond to initialization request */ if (crq.s.format == 0x01) { memset(crq.raw, 0, 16); crq.s.valid = 0xc0; crq.s.format = 0x02; spapr_vio_send_crq(dev, crq.raw); } /* Note that in hotplug cases, we might get a 0x02 * as a result of us emitting the init request */ break; case 0xff: /* Link event */ /* Not handled for now */ break; case 0x80: /* Payloads */ switch (crq.s.format) { case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */ case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */ vscsi_got_payload(s, &crq); break; case VIOSRP_OS400_FORMAT: case VIOSRP_AIX_FORMAT: case VIOSRP_LINUX_FORMAT: case VIOSRP_INLINE_FORMAT: fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n", crq.s.format); break; default: fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n", crq.s.format); } break; default: fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n", crq.raw[0], crq.raw[1]); }; return 0; } static const struct SCSIBusOps vscsi_scsi_ops = { .complete = vscsi_command_complete, .cancel = vscsi_request_cancelled }; static int spapr_vscsi_init(VIOsPAPRDevice *dev) { VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); int i; dbg_vscsi_state = s; /* Initialize qemu request tags */ memset(s->reqs, 0, sizeof(s->reqs)); for (i = 0; i < VSCSI_REQ_LIMIT; i++) { s->reqs[i].qtag = i; } dev->crq.SendFunc = vscsi_do_crq; scsi_bus_new(&s->bus, &dev->qdev, 1, VSCSI_REQ_LIMIT, &vscsi_scsi_ops); if (!dev->qdev.hotplugged) { scsi_bus_legacy_handle_cmdline(&s->bus); } return 0; } void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg, qemu_irq qirq, uint32_t vio_irq_num) { DeviceState *dev; VIOsPAPRDevice *sdev; dev = qdev_create(&bus->bus, "spapr-vscsi"); qdev_prop_set_uint32(dev, "reg", reg); qdev_init_nofail(dev); sdev = (VIOsPAPRDevice *)dev; sdev->qirq = qirq; sdev->vio_irq_num = vio_irq_num; } static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) { int ret; ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2); if (ret < 0) { return ret; } ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0); if (ret < 0) { return ret; } return 0; } static VIOsPAPRDeviceInfo spapr_vscsi = { .init = spapr_vscsi_init, .devnode = spapr_vscsi_devnode, .dt_name = "v-scsi", .dt_type = "vscsi", .dt_compatible = "IBM,v-scsi", .signal_mask = 0x00000001, .qdev.name = "spapr-vscsi", .qdev.size = sizeof(VSCSIState), .qdev.props = (Property[]) { DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0x2000), DEFINE_PROP_UINT32("dma-window", VIOsPAPRDevice, rtce_window_size, 0x10000000), DEFINE_PROP_END_OF_LIST(), }, }; static void spapr_vscsi_register(void) { spapr_vio_bus_register_withprop(&spapr_vscsi); } device_init(spapr_vscsi_register);