/* * QEMU NVM Express Controller * * Copyright (c) 2012, Intel Corporation * * Written by Keith Busch * * This code is licensed under the GNU GPL v2 or later. */ /** * Reference Specs: http://www.nvmexpress.org, 1.2, 1.1, 1.0e * * http://www.nvmexpress.org/resources/ */ /** * Usage: add options: * -drive file=,if=none,id= * -device nvme,drive=,serial=,id=, \ * cmb_size_mb=, \ * [pmrdev=,] \ * max_ioqpairs= * * Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at * offset 0 in BAR2 and supports only WDS, RDS and SQS for now. * * cmb_size_mb= and pmrdev= options are mutually exclusive due to limitation * in available BAR's. cmb_size_mb= will take precedence over pmrdev= when * both provided. * Enabling pmr emulation can be achieved by pointing to memory-backend-file. * For example: * -object memory-backend-file,id=,share=on,mem-path=, \ * size= .... -device nvme,...,pmrdev= */ #include "qemu/osdep.h" #include "qemu/units.h" #include "qemu/error-report.h" #include "hw/block/block.h" #include "hw/pci/msix.h" #include "hw/pci/pci.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" #include "sysemu/sysemu.h" #include "qapi/error.h" #include "qapi/visitor.h" #include "sysemu/hostmem.h" #include "sysemu/block-backend.h" #include "exec/memory.h" #include "qemu/log.h" #include "qemu/module.h" #include "qemu/cutils.h" #include "trace.h" #include "nvme.h" #define NVME_MAX_IOQPAIRS 0xffff #define NVME_REG_SIZE 0x1000 #define NVME_DB_SIZE 4 #define NVME_CMB_BIR 2 #define NVME_PMR_BIR 2 #define NVME_GUEST_ERR(trace, fmt, ...) \ do { \ (trace_##trace)(__VA_ARGS__); \ qemu_log_mask(LOG_GUEST_ERROR, #trace \ " in %s: " fmt "\n", __func__, ## __VA_ARGS__); \ } while (0) static void nvme_process_sq(void *opaque); static bool nvme_addr_is_cmb(NvmeCtrl *n, hwaddr addr) { hwaddr low = n->ctrl_mem.addr; hwaddr hi = n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size); return addr >= low && addr < hi; } static void nvme_addr_read(NvmeCtrl *n, hwaddr addr, void *buf, int size) { if (n->bar.cmbsz && nvme_addr_is_cmb(n, addr)) { memcpy(buf, (void *)&n->cmbuf[addr - n->ctrl_mem.addr], size); return; } pci_dma_read(&n->parent_obj, addr, buf, size); } static int nvme_check_sqid(NvmeCtrl *n, uint16_t sqid) { return sqid < n->params.max_ioqpairs + 1 && n->sq[sqid] != NULL ? 0 : -1; } static int nvme_check_cqid(NvmeCtrl *n, uint16_t cqid) { return cqid < n->params.max_ioqpairs + 1 && n->cq[cqid] != NULL ? 0 : -1; } static void nvme_inc_cq_tail(NvmeCQueue *cq) { cq->tail++; if (cq->tail >= cq->size) { cq->tail = 0; cq->phase = !cq->phase; } } static void nvme_inc_sq_head(NvmeSQueue *sq) { sq->head = (sq->head + 1) % sq->size; } static uint8_t nvme_cq_full(NvmeCQueue *cq) { return (cq->tail + 1) % cq->size == cq->head; } static uint8_t nvme_sq_empty(NvmeSQueue *sq) { return sq->head == sq->tail; } static void nvme_irq_check(NvmeCtrl *n) { if (msix_enabled(&(n->parent_obj))) { return; } if (~n->bar.intms & n->irq_status) { pci_irq_assert(&n->parent_obj); } else { pci_irq_deassert(&n->parent_obj); } } static void nvme_irq_assert(NvmeCtrl *n, NvmeCQueue *cq) { if (cq->irq_enabled) { if (msix_enabled(&(n->parent_obj))) { trace_pci_nvme_irq_msix(cq->vector); msix_notify(&(n->parent_obj), cq->vector); } else { trace_pci_nvme_irq_pin(); assert(cq->vector < 32); n->irq_status |= 1 << cq->vector; nvme_irq_check(n); } } else { trace_pci_nvme_irq_masked(); } } static void nvme_irq_deassert(NvmeCtrl *n, NvmeCQueue *cq) { if (cq->irq_enabled) { if (msix_enabled(&(n->parent_obj))) { return; } else { assert(cq->vector < 32); n->irq_status &= ~(1 << cq->vector); nvme_irq_check(n); } } } static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t prp1, uint64_t prp2, uint32_t len, NvmeCtrl *n) { hwaddr trans_len = n->page_size - (prp1 % n->page_size); trans_len = MIN(len, trans_len); int num_prps = (len >> n->page_bits) + 1; if (unlikely(!prp1)) { trace_pci_nvme_err_invalid_prp(); return NVME_INVALID_FIELD | NVME_DNR; } else if (n->bar.cmbsz && prp1 >= n->ctrl_mem.addr && prp1 < n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size)) { qsg->nsg = 0; qemu_iovec_init(iov, num_prps); qemu_iovec_add(iov, (void *)&n->cmbuf[prp1 - n->ctrl_mem.addr], trans_len); } else { pci_dma_sglist_init(qsg, &n->parent_obj, num_prps); qemu_sglist_add(qsg, prp1, trans_len); } len -= trans_len; if (len) { if (unlikely(!prp2)) { trace_pci_nvme_err_invalid_prp2_missing(); goto unmap; } if (len > n->page_size) { uint64_t prp_list[n->max_prp_ents]; uint32_t nents, prp_trans; int i = 0; nents = (len + n->page_size - 1) >> n->page_bits; prp_trans = MIN(n->max_prp_ents, nents) * sizeof(uint64_t); nvme_addr_read(n, prp2, (void *)prp_list, prp_trans); while (len != 0) { uint64_t prp_ent = le64_to_cpu(prp_list[i]); if (i == n->max_prp_ents - 1 && len > n->page_size) { if (unlikely(!prp_ent || prp_ent & (n->page_size - 1))) { trace_pci_nvme_err_invalid_prplist_ent(prp_ent); goto unmap; } i = 0; nents = (len + n->page_size - 1) >> n->page_bits; prp_trans = MIN(n->max_prp_ents, nents) * sizeof(uint64_t); nvme_addr_read(n, prp_ent, (void *)prp_list, prp_trans); prp_ent = le64_to_cpu(prp_list[i]); } if (unlikely(!prp_ent || prp_ent & (n->page_size - 1))) { trace_pci_nvme_err_invalid_prplist_ent(prp_ent); goto unmap; } trans_len = MIN(len, n->page_size); if (qsg->nsg){ qemu_sglist_add(qsg, prp_ent, trans_len); } else { qemu_iovec_add(iov, (void *)&n->cmbuf[prp_ent - n->ctrl_mem.addr], trans_len); } len -= trans_len; i++; } } else { if (unlikely(prp2 & (n->page_size - 1))) { trace_pci_nvme_err_invalid_prp2_align(prp2); goto unmap; } if (qsg->nsg) { qemu_sglist_add(qsg, prp2, len); } else { qemu_iovec_add(iov, (void *)&n->cmbuf[prp2 - n->ctrl_mem.addr], trans_len); } } } return NVME_SUCCESS; unmap: qemu_sglist_destroy(qsg); return NVME_INVALID_FIELD | NVME_DNR; } static uint16_t nvme_dma_write_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len, uint64_t prp1, uint64_t prp2) { QEMUSGList qsg; QEMUIOVector iov; uint16_t status = NVME_SUCCESS; if (nvme_map_prp(&qsg, &iov, prp1, prp2, len, n)) { return NVME_INVALID_FIELD | NVME_DNR; } if (qsg.nsg > 0) { if (dma_buf_write(ptr, len, &qsg)) { status = NVME_INVALID_FIELD | NVME_DNR; } qemu_sglist_destroy(&qsg); } else { if (qemu_iovec_to_buf(&iov, 0, ptr, len) != len) { status = NVME_INVALID_FIELD | NVME_DNR; } qemu_iovec_destroy(&iov); } return status; } static uint16_t nvme_dma_read_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len, uint64_t prp1, uint64_t prp2) { QEMUSGList qsg; QEMUIOVector iov; uint16_t status = NVME_SUCCESS; trace_pci_nvme_dma_read(prp1, prp2); if (nvme_map_prp(&qsg, &iov, prp1, prp2, len, n)) { return NVME_INVALID_FIELD | NVME_DNR; } if (qsg.nsg > 0) { if (unlikely(dma_buf_read(ptr, len, &qsg))) { trace_pci_nvme_err_invalid_dma(); status = NVME_INVALID_FIELD | NVME_DNR; } qemu_sglist_destroy(&qsg); } else { if (unlikely(qemu_iovec_from_buf(&iov, 0, ptr, len) != len)) { trace_pci_nvme_err_invalid_dma(); status = NVME_INVALID_FIELD | NVME_DNR; } qemu_iovec_destroy(&iov); } return status; } static void nvme_post_cqes(void *opaque) { NvmeCQueue *cq = opaque; NvmeCtrl *n = cq->ctrl; NvmeRequest *req, *next; QTAILQ_FOREACH_SAFE(req, &cq->req_list, entry, next) { NvmeSQueue *sq; hwaddr addr; if (nvme_cq_full(cq)) { break; } QTAILQ_REMOVE(&cq->req_list, req, entry); sq = req->sq; req->cqe.status = cpu_to_le16((req->status << 1) | cq->phase); req->cqe.sq_id = cpu_to_le16(sq->sqid); req->cqe.sq_head = cpu_to_le16(sq->head); addr = cq->dma_addr + cq->tail * n->cqe_size; nvme_inc_cq_tail(cq); pci_dma_write(&n->parent_obj, addr, (void *)&req->cqe, sizeof(req->cqe)); QTAILQ_INSERT_TAIL(&sq->req_list, req, entry); } if (cq->tail != cq->head) { nvme_irq_assert(n, cq); } } static void nvme_enqueue_req_completion(NvmeCQueue *cq, NvmeRequest *req) { assert(cq->cqid == req->sq->cqid); QTAILQ_REMOVE(&req->sq->out_req_list, req, entry); QTAILQ_INSERT_TAIL(&cq->req_list, req, entry); timer_mod(cq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500); } static void nvme_rw_cb(void *opaque, int ret) { NvmeRequest *req = opaque; NvmeSQueue *sq = req->sq; NvmeCtrl *n = sq->ctrl; NvmeCQueue *cq = n->cq[sq->cqid]; if (!ret) { block_acct_done(blk_get_stats(n->conf.blk), &req->acct); req->status = NVME_SUCCESS; } else { block_acct_failed(blk_get_stats(n->conf.blk), &req->acct); req->status = NVME_INTERNAL_DEV_ERROR; } if (req->has_sg) { qemu_sglist_destroy(&req->qsg); } nvme_enqueue_req_completion(cq, req); } static uint16_t nvme_flush(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd, NvmeRequest *req) { req->has_sg = false; block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0, BLOCK_ACCT_FLUSH); req->aiocb = blk_aio_flush(n->conf.blk, nvme_rw_cb, req); return NVME_NO_COMPLETE; } static uint16_t nvme_write_zeros(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd, NvmeRequest *req) { NvmeRwCmd *rw = (NvmeRwCmd *)cmd; const uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas); const uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds; uint64_t slba = le64_to_cpu(rw->slba); uint32_t nlb = le16_to_cpu(rw->nlb) + 1; uint64_t offset = slba << data_shift; uint32_t count = nlb << data_shift; if (unlikely(slba + nlb > ns->id_ns.nsze)) { trace_pci_nvme_err_invalid_lba_range(slba, nlb, ns->id_ns.nsze); return NVME_LBA_RANGE | NVME_DNR; } req->has_sg = false; block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0, BLOCK_ACCT_WRITE); req->aiocb = blk_aio_pwrite_zeroes(n->conf.blk, offset, count, BDRV_REQ_MAY_UNMAP, nvme_rw_cb, req); return NVME_NO_COMPLETE; } static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd, NvmeRequest *req) { NvmeRwCmd *rw = (NvmeRwCmd *)cmd; uint32_t nlb = le32_to_cpu(rw->nlb) + 1; uint64_t slba = le64_to_cpu(rw->slba); uint64_t prp1 = le64_to_cpu(rw->prp1); uint64_t prp2 = le64_to_cpu(rw->prp2); uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas); uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds; uint64_t data_size = (uint64_t)nlb << data_shift; uint64_t data_offset = slba << data_shift; int is_write = rw->opcode == NVME_CMD_WRITE ? 1 : 0; enum BlockAcctType acct = is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ; trace_pci_nvme_rw(is_write ? "write" : "read", nlb, data_size, slba); if (unlikely((slba + nlb) > ns->id_ns.nsze)) { block_acct_invalid(blk_get_stats(n->conf.blk), acct); trace_pci_nvme_err_invalid_lba_range(slba, nlb, ns->id_ns.nsze); return NVME_LBA_RANGE | NVME_DNR; } if (nvme_map_prp(&req->qsg, &req->iov, prp1, prp2, data_size, n)) { block_acct_invalid(blk_get_stats(n->conf.blk), acct); return NVME_INVALID_FIELD | NVME_DNR; } dma_acct_start(n->conf.blk, &req->acct, &req->qsg, acct); if (req->qsg.nsg > 0) { req->has_sg = true; req->aiocb = is_write ? dma_blk_write(n->conf.blk, &req->qsg, data_offset, BDRV_SECTOR_SIZE, nvme_rw_cb, req) : dma_blk_read(n->conf.blk, &req->qsg, data_offset, BDRV_SECTOR_SIZE, nvme_rw_cb, req); } else { req->has_sg = false; req->aiocb = is_write ? blk_aio_pwritev(n->conf.blk, data_offset, &req->iov, 0, nvme_rw_cb, req) : blk_aio_preadv(n->conf.blk, data_offset, &req->iov, 0, nvme_rw_cb, req); } return NVME_NO_COMPLETE; } static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req) { NvmeNamespace *ns; uint32_t nsid = le32_to_cpu(cmd->nsid); if (unlikely(nsid == 0 || nsid > n->num_namespaces)) { trace_pci_nvme_err_invalid_ns(nsid, n->num_namespaces); return NVME_INVALID_NSID | NVME_DNR; } ns = &n->namespaces[nsid - 1]; switch (cmd->opcode) { case NVME_CMD_FLUSH: return nvme_flush(n, ns, cmd, req); case NVME_CMD_WRITE_ZEROS: return nvme_write_zeros(n, ns, cmd, req); case NVME_CMD_WRITE: case NVME_CMD_READ: return nvme_rw(n, ns, cmd, req); default: trace_pci_nvme_err_invalid_opc(cmd->opcode); return NVME_INVALID_OPCODE | NVME_DNR; } } static void nvme_free_sq(NvmeSQueue *sq, NvmeCtrl *n) { n->sq[sq->sqid] = NULL; timer_del(sq->timer); timer_free(sq->timer); g_free(sq->io_req); if (sq->sqid) { g_free(sq); } } static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeCmd *cmd) { NvmeDeleteQ *c = (NvmeDeleteQ *)cmd; NvmeRequest *req, *next; NvmeSQueue *sq; NvmeCQueue *cq; uint16_t qid = le16_to_cpu(c->qid); if (unlikely(!qid || nvme_check_sqid(n, qid))) { trace_pci_nvme_err_invalid_del_sq(qid); return NVME_INVALID_QID | NVME_DNR; } trace_pci_nvme_del_sq(qid); sq = n->sq[qid]; while (!QTAILQ_EMPTY(&sq->out_req_list)) { req = QTAILQ_FIRST(&sq->out_req_list); assert(req->aiocb); blk_aio_cancel(req->aiocb); } if (!nvme_check_cqid(n, sq->cqid)) { cq = n->cq[sq->cqid]; QTAILQ_REMOVE(&cq->sq_list, sq, entry); nvme_post_cqes(cq); QTAILQ_FOREACH_SAFE(req, &cq->req_list, entry, next) { if (req->sq == sq) { QTAILQ_REMOVE(&cq->req_list, req, entry); QTAILQ_INSERT_TAIL(&sq->req_list, req, entry); } } } nvme_free_sq(sq, n); return NVME_SUCCESS; } static void nvme_init_sq(NvmeSQueue *sq, NvmeCtrl *n, uint64_t dma_addr, uint16_t sqid, uint16_t cqid, uint16_t size) { int i; NvmeCQueue *cq; sq->ctrl = n; sq->dma_addr = dma_addr; sq->sqid = sqid; sq->size = size; sq->cqid = cqid; sq->head = sq->tail = 0; sq->io_req = g_new(NvmeRequest, sq->size); QTAILQ_INIT(&sq->req_list); QTAILQ_INIT(&sq->out_req_list); for (i = 0; i < sq->size; i++) { sq->io_req[i].sq = sq; QTAILQ_INSERT_TAIL(&(sq->req_list), &sq->io_req[i], entry); } sq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_process_sq, sq); assert(n->cq[cqid]); cq = n->cq[cqid]; QTAILQ_INSERT_TAIL(&(cq->sq_list), sq, entry); n->sq[sqid] = sq; } static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeCmd *cmd) { NvmeSQueue *sq; NvmeCreateSq *c = (NvmeCreateSq *)cmd; uint16_t cqid = le16_to_cpu(c->cqid); uint16_t sqid = le16_to_cpu(c->sqid); uint16_t qsize = le16_to_cpu(c->qsize); uint16_t qflags = le16_to_cpu(c->sq_flags); uint64_t prp1 = le64_to_cpu(c->prp1); trace_pci_nvme_create_sq(prp1, sqid, cqid, qsize, qflags); if (unlikely(!cqid || nvme_check_cqid(n, cqid))) { trace_pci_nvme_err_invalid_create_sq_cqid(cqid); return NVME_INVALID_CQID | NVME_DNR; } if (unlikely(!sqid || !nvme_check_sqid(n, sqid))) { trace_pci_nvme_err_invalid_create_sq_sqid(sqid); return NVME_INVALID_QID | NVME_DNR; } if (unlikely(!qsize || qsize > NVME_CAP_MQES(n->bar.cap))) { trace_pci_nvme_err_invalid_create_sq_size(qsize); return NVME_MAX_QSIZE_EXCEEDED | NVME_DNR; } if (unlikely(!prp1 || prp1 & (n->page_size - 1))) { trace_pci_nvme_err_invalid_create_sq_addr(prp1); return NVME_INVALID_FIELD | NVME_DNR; } if (unlikely(!(NVME_SQ_FLAGS_PC(qflags)))) { trace_pci_nvme_err_invalid_create_sq_qflags(NVME_SQ_FLAGS_PC(qflags)); return NVME_INVALID_FIELD | NVME_DNR; } sq = g_malloc0(sizeof(*sq)); nvme_init_sq(sq, n, prp1, sqid, cqid, qsize + 1); return NVME_SUCCESS; } static void nvme_free_cq(NvmeCQueue *cq, NvmeCtrl *n) { n->cq[cq->cqid] = NULL; timer_del(cq->timer); timer_free(cq->timer); msix_vector_unuse(&n->parent_obj, cq->vector); if (cq->cqid) { g_free(cq); } } static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeCmd *cmd) { NvmeDeleteQ *c = (NvmeDeleteQ *)cmd; NvmeCQueue *cq; uint16_t qid = le16_to_cpu(c->qid); if (unlikely(!qid || nvme_check_cqid(n, qid))) { trace_pci_nvme_err_invalid_del_cq_cqid(qid); return NVME_INVALID_CQID | NVME_DNR; } cq = n->cq[qid]; if (unlikely(!QTAILQ_EMPTY(&cq->sq_list))) { trace_pci_nvme_err_invalid_del_cq_notempty(qid); return NVME_INVALID_QUEUE_DEL; } nvme_irq_deassert(n, cq); trace_pci_nvme_del_cq(qid); nvme_free_cq(cq, n); return NVME_SUCCESS; } static void nvme_init_cq(NvmeCQueue *cq, NvmeCtrl *n, uint64_t dma_addr, uint16_t cqid, uint16_t vector, uint16_t size, uint16_t irq_enabled) { int ret; ret = msix_vector_use(&n->parent_obj, vector); assert(ret == 0); cq->ctrl = n; cq->cqid = cqid; cq->size = size; cq->dma_addr = dma_addr; cq->phase = 1; cq->irq_enabled = irq_enabled; cq->vector = vector; cq->head = cq->tail = 0; QTAILQ_INIT(&cq->req_list); QTAILQ_INIT(&cq->sq_list); n->cq[cqid] = cq; cq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_post_cqes, cq); } static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd) { NvmeCQueue *cq; NvmeCreateCq *c = (NvmeCreateCq *)cmd; uint16_t cqid = le16_to_cpu(c->cqid); uint16_t vector = le16_to_cpu(c->irq_vector); uint16_t qsize = le16_to_cpu(c->qsize); uint16_t qflags = le16_to_cpu(c->cq_flags); uint64_t prp1 = le64_to_cpu(c->prp1); trace_pci_nvme_create_cq(prp1, cqid, vector, qsize, qflags, NVME_CQ_FLAGS_IEN(qflags) != 0); if (unlikely(!cqid || !nvme_check_cqid(n, cqid))) { trace_pci_nvme_err_invalid_create_cq_cqid(cqid); return NVME_INVALID_CQID | NVME_DNR; } if (unlikely(!qsize || qsize > NVME_CAP_MQES(n->bar.cap))) { trace_pci_nvme_err_invalid_create_cq_size(qsize); return NVME_MAX_QSIZE_EXCEEDED | NVME_DNR; } if (unlikely(!prp1)) { trace_pci_nvme_err_invalid_create_cq_addr(prp1); return NVME_INVALID_FIELD | NVME_DNR; } if (unlikely(!msix_enabled(&n->parent_obj) && vector)) { trace_pci_nvme_err_invalid_create_cq_vector(vector); return NVME_INVALID_IRQ_VECTOR | NVME_DNR; } if (unlikely(vector >= n->params.msix_qsize)) { trace_pci_nvme_err_invalid_create_cq_vector(vector); return NVME_INVALID_IRQ_VECTOR | NVME_DNR; } if (unlikely(!(NVME_CQ_FLAGS_PC(qflags)))) { trace_pci_nvme_err_invalid_create_cq_qflags(NVME_CQ_FLAGS_PC(qflags)); return NVME_INVALID_FIELD | NVME_DNR; } cq = g_malloc0(sizeof(*cq)); nvme_init_cq(cq, n, prp1, cqid, vector, qsize + 1, NVME_CQ_FLAGS_IEN(qflags)); return NVME_SUCCESS; } static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c) { uint64_t prp1 = le64_to_cpu(c->prp1); uint64_t prp2 = le64_to_cpu(c->prp2); trace_pci_nvme_identify_ctrl(); return nvme_dma_read_prp(n, (uint8_t *)&n->id_ctrl, sizeof(n->id_ctrl), prp1, prp2); } static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c) { NvmeNamespace *ns; uint32_t nsid = le32_to_cpu(c->nsid); uint64_t prp1 = le64_to_cpu(c->prp1); uint64_t prp2 = le64_to_cpu(c->prp2); trace_pci_nvme_identify_ns(nsid); if (unlikely(nsid == 0 || nsid > n->num_namespaces)) { trace_pci_nvme_err_invalid_ns(nsid, n->num_namespaces); return NVME_INVALID_NSID | NVME_DNR; } ns = &n->namespaces[nsid - 1]; return nvme_dma_read_prp(n, (uint8_t *)&ns->id_ns, sizeof(ns->id_ns), prp1, prp2); } static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeIdentify *c) { static const int data_len = NVME_IDENTIFY_DATA_SIZE; uint32_t min_nsid = le32_to_cpu(c->nsid); uint64_t prp1 = le64_to_cpu(c->prp1); uint64_t prp2 = le64_to_cpu(c->prp2); uint32_t *list; uint16_t ret; int i, j = 0; trace_pci_nvme_identify_nslist(min_nsid); list = g_malloc0(data_len); for (i = 0; i < n->num_namespaces; i++) { if (i < min_nsid) { continue; } list[j++] = cpu_to_le32(i + 1); if (j == data_len / sizeof(uint32_t)) { break; } } ret = nvme_dma_read_prp(n, (uint8_t *)list, data_len, prp1, prp2); g_free(list); return ret; } static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd *cmd) { NvmeIdentify *c = (NvmeIdentify *)cmd; switch (le32_to_cpu(c->cns)) { case NVME_ID_CNS_NS: return nvme_identify_ns(n, c); case NVME_ID_CNS_CTRL: return nvme_identify_ctrl(n, c); case NVME_ID_CNS_NS_ACTIVE_LIST: return nvme_identify_nslist(n, c); default: trace_pci_nvme_err_invalid_identify_cns(le32_to_cpu(c->cns)); return NVME_INVALID_FIELD | NVME_DNR; } } static inline void nvme_set_timestamp(NvmeCtrl *n, uint64_t ts) { trace_pci_nvme_setfeat_timestamp(ts); n->host_timestamp = le64_to_cpu(ts); n->timestamp_set_qemu_clock_ms = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); } static inline uint64_t nvme_get_timestamp(const NvmeCtrl *n) { uint64_t current_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); uint64_t elapsed_time = current_time - n->timestamp_set_qemu_clock_ms; union nvme_timestamp { struct { uint64_t timestamp:48; uint64_t sync:1; uint64_t origin:3; uint64_t rsvd1:12; }; uint64_t all; }; union nvme_timestamp ts; ts.all = 0; /* * If the sum of the Timestamp value set by the host and the elapsed * time exceeds 2^48, the value returned should be reduced modulo 2^48. */ ts.timestamp = (n->host_timestamp + elapsed_time) & 0xffffffffffff; /* If the host timestamp is non-zero, set the timestamp origin */ ts.origin = n->host_timestamp ? 0x01 : 0x00; trace_pci_nvme_getfeat_timestamp(ts.all); return cpu_to_le64(ts.all); } static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd) { uint64_t prp1 = le64_to_cpu(cmd->prp1); uint64_t prp2 = le64_to_cpu(cmd->prp2); uint64_t timestamp = nvme_get_timestamp(n); return nvme_dma_read_prp(n, (uint8_t *)×tamp, sizeof(timestamp), prp1, prp2); } static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req) { uint32_t dw10 = le32_to_cpu(cmd->cdw10); uint32_t result; switch (dw10) { case NVME_VOLATILE_WRITE_CACHE: result = blk_enable_write_cache(n->conf.blk); trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled"); break; case NVME_NUMBER_OF_QUEUES: result = cpu_to_le32((n->params.max_ioqpairs - 1) | ((n->params.max_ioqpairs - 1) << 16)); trace_pci_nvme_getfeat_numq(result); break; case NVME_TIMESTAMP: return nvme_get_feature_timestamp(n, cmd); default: trace_pci_nvme_err_invalid_getfeat(dw10); return NVME_INVALID_FIELD | NVME_DNR; } req->cqe.result = result; return NVME_SUCCESS; } static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd) { uint16_t ret; uint64_t timestamp; uint64_t prp1 = le64_to_cpu(cmd->prp1); uint64_t prp2 = le64_to_cpu(cmd->prp2); ret = nvme_dma_write_prp(n, (uint8_t *)×tamp, sizeof(timestamp), prp1, prp2); if (ret != NVME_SUCCESS) { return ret; } nvme_set_timestamp(n, timestamp); return NVME_SUCCESS; } static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req) { uint32_t dw10 = le32_to_cpu(cmd->cdw10); uint32_t dw11 = le32_to_cpu(cmd->cdw11); switch (dw10) { case NVME_VOLATILE_WRITE_CACHE: blk_set_enable_write_cache(n->conf.blk, dw11 & 1); break; case NVME_NUMBER_OF_QUEUES: trace_pci_nvme_setfeat_numq((dw11 & 0xFFFF) + 1, ((dw11 >> 16) & 0xFFFF) + 1, n->params.max_ioqpairs, n->params.max_ioqpairs); req->cqe.result = cpu_to_le32((n->params.max_ioqpairs - 1) | ((n->params.max_ioqpairs - 1) << 16)); break; case NVME_TIMESTAMP: return nvme_set_feature_timestamp(n, cmd); default: trace_pci_nvme_err_invalid_setfeat(dw10); return NVME_INVALID_FIELD | NVME_DNR; } return NVME_SUCCESS; } static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req) { switch (cmd->opcode) { case NVME_ADM_CMD_DELETE_SQ: return nvme_del_sq(n, cmd); case NVME_ADM_CMD_CREATE_SQ: return nvme_create_sq(n, cmd); case NVME_ADM_CMD_DELETE_CQ: return nvme_del_cq(n, cmd); case NVME_ADM_CMD_CREATE_CQ: return nvme_create_cq(n, cmd); case NVME_ADM_CMD_IDENTIFY: return nvme_identify(n, cmd); case NVME_ADM_CMD_SET_FEATURES: return nvme_set_feature(n, cmd, req); case NVME_ADM_CMD_GET_FEATURES: return nvme_get_feature(n, cmd, req); default: trace_pci_nvme_err_invalid_admin_opc(cmd->opcode); return NVME_INVALID_OPCODE | NVME_DNR; } } static void nvme_process_sq(void *opaque) { NvmeSQueue *sq = opaque; NvmeCtrl *n = sq->ctrl; NvmeCQueue *cq = n->cq[sq->cqid]; uint16_t status; hwaddr addr; NvmeCmd cmd; NvmeRequest *req; while (!(nvme_sq_empty(sq) || QTAILQ_EMPTY(&sq->req_list))) { addr = sq->dma_addr + sq->head * n->sqe_size; nvme_addr_read(n, addr, (void *)&cmd, sizeof(cmd)); nvme_inc_sq_head(sq); req = QTAILQ_FIRST(&sq->req_list); QTAILQ_REMOVE(&sq->req_list, req, entry); QTAILQ_INSERT_TAIL(&sq->out_req_list, req, entry); memset(&req->cqe, 0, sizeof(req->cqe)); req->cqe.cid = cmd.cid; status = sq->sqid ? nvme_io_cmd(n, &cmd, req) : nvme_admin_cmd(n, &cmd, req); if (status != NVME_NO_COMPLETE) { req->status = status; nvme_enqueue_req_completion(cq, req); } } } static void nvme_clear_ctrl(NvmeCtrl *n) { int i; blk_drain(n->conf.blk); for (i = 0; i < n->params.max_ioqpairs + 1; i++) { if (n->sq[i] != NULL) { nvme_free_sq(n->sq[i], n); } } for (i = 0; i < n->params.max_ioqpairs + 1; i++) { if (n->cq[i] != NULL) { nvme_free_cq(n->cq[i], n); } } blk_flush(n->conf.blk); n->bar.cc = 0; } static int nvme_start_ctrl(NvmeCtrl *n) { uint32_t page_bits = NVME_CC_MPS(n->bar.cc) + 12; uint32_t page_size = 1 << page_bits; if (unlikely(n->cq[0])) { trace_pci_nvme_err_startfail_cq(); return -1; } if (unlikely(n->sq[0])) { trace_pci_nvme_err_startfail_sq(); return -1; } if (unlikely(!n->bar.asq)) { trace_pci_nvme_err_startfail_nbarasq(); return -1; } if (unlikely(!n->bar.acq)) { trace_pci_nvme_err_startfail_nbaracq(); return -1; } if (unlikely(n->bar.asq & (page_size - 1))) { trace_pci_nvme_err_startfail_asq_misaligned(n->bar.asq); return -1; } if (unlikely(n->bar.acq & (page_size - 1))) { trace_pci_nvme_err_startfail_acq_misaligned(n->bar.acq); return -1; } if (unlikely(NVME_CC_MPS(n->bar.cc) < NVME_CAP_MPSMIN(n->bar.cap))) { trace_pci_nvme_err_startfail_page_too_small( NVME_CC_MPS(n->bar.cc), NVME_CAP_MPSMIN(n->bar.cap)); return -1; } if (unlikely(NVME_CC_MPS(n->bar.cc) > NVME_CAP_MPSMAX(n->bar.cap))) { trace_pci_nvme_err_startfail_page_too_large( NVME_CC_MPS(n->bar.cc), NVME_CAP_MPSMAX(n->bar.cap)); return -1; } if (unlikely(NVME_CC_IOCQES(n->bar.cc) < NVME_CTRL_CQES_MIN(n->id_ctrl.cqes))) { trace_pci_nvme_err_startfail_cqent_too_small( NVME_CC_IOCQES(n->bar.cc), NVME_CTRL_CQES_MIN(n->bar.cap)); return -1; } if (unlikely(NVME_CC_IOCQES(n->bar.cc) > NVME_CTRL_CQES_MAX(n->id_ctrl.cqes))) { trace_pci_nvme_err_startfail_cqent_too_large( NVME_CC_IOCQES(n->bar.cc), NVME_CTRL_CQES_MAX(n->bar.cap)); return -1; } if (unlikely(NVME_CC_IOSQES(n->bar.cc) < NVME_CTRL_SQES_MIN(n->id_ctrl.sqes))) { trace_pci_nvme_err_startfail_sqent_too_small( NVME_CC_IOSQES(n->bar.cc), NVME_CTRL_SQES_MIN(n->bar.cap)); return -1; } if (unlikely(NVME_CC_IOSQES(n->bar.cc) > NVME_CTRL_SQES_MAX(n->id_ctrl.sqes))) { trace_pci_nvme_err_startfail_sqent_too_large( NVME_CC_IOSQES(n->bar.cc), NVME_CTRL_SQES_MAX(n->bar.cap)); return -1; } if (unlikely(!NVME_AQA_ASQS(n->bar.aqa))) { trace_pci_nvme_err_startfail_asqent_sz_zero(); return -1; } if (unlikely(!NVME_AQA_ACQS(n->bar.aqa))) { trace_pci_nvme_err_startfail_acqent_sz_zero(); return -1; } n->page_bits = page_bits; n->page_size = page_size; n->max_prp_ents = n->page_size / sizeof(uint64_t); n->cqe_size = 1 << NVME_CC_IOCQES(n->bar.cc); n->sqe_size = 1 << NVME_CC_IOSQES(n->bar.cc); nvme_init_cq(&n->admin_cq, n, n->bar.acq, 0, 0, NVME_AQA_ACQS(n->bar.aqa) + 1, 1); nvme_init_sq(&n->admin_sq, n, n->bar.asq, 0, 0, NVME_AQA_ASQS(n->bar.aqa) + 1); nvme_set_timestamp(n, 0ULL); return 0; } static void nvme_write_bar(NvmeCtrl *n, hwaddr offset, uint64_t data, unsigned size) { if (unlikely(offset & (sizeof(uint32_t) - 1))) { NVME_GUEST_ERR(pci_nvme_ub_mmiowr_misaligned32, "MMIO write not 32-bit aligned," " offset=0x%"PRIx64"", offset); /* should be ignored, fall through for now */ } if (unlikely(size < sizeof(uint32_t))) { NVME_GUEST_ERR(pci_nvme_ub_mmiowr_toosmall, "MMIO write smaller than 32-bits," " offset=0x%"PRIx64", size=%u", offset, size); /* should be ignored, fall through for now */ } switch (offset) { case 0xc: /* INTMS */ if (unlikely(msix_enabled(&(n->parent_obj)))) { NVME_GUEST_ERR(pci_nvme_ub_mmiowr_intmask_with_msix, "undefined access to interrupt mask set" " when MSI-X is enabled"); /* should be ignored, fall through for now */ } n->bar.intms |= data & 0xffffffff; n->bar.intmc = n->bar.intms; trace_pci_nvme_mmio_intm_set(data & 0xffffffff, n->bar.intmc); nvme_irq_check(n); break; case 0x10: /* INTMC */ if (unlikely(msix_enabled(&(n->parent_obj)))) { NVME_GUEST_ERR(pci_nvme_ub_mmiowr_intmask_with_msix, "undefined access to interrupt mask clr" " when MSI-X is enabled"); /* should be ignored, fall through for now */ } n->bar.intms &= ~(data & 0xffffffff); n->bar.intmc = n->bar.intms; trace_pci_nvme_mmio_intm_clr(data & 0xffffffff, n->bar.intmc); nvme_irq_check(n); break; case 0x14: /* CC */ trace_pci_nvme_mmio_cfg(data & 0xffffffff); /* Windows first sends data, then sends enable bit */ if (!NVME_CC_EN(data) && !NVME_CC_EN(n->bar.cc) && !NVME_CC_SHN(data) && !NVME_CC_SHN(n->bar.cc)) { n->bar.cc = data; } if (NVME_CC_EN(data) && !NVME_CC_EN(n->bar.cc)) { n->bar.cc = data; if (unlikely(nvme_start_ctrl(n))) { trace_pci_nvme_err_startfail(); n->bar.csts = NVME_CSTS_FAILED; } else { trace_pci_nvme_mmio_start_success(); n->bar.csts = NVME_CSTS_READY; } } else if (!NVME_CC_EN(data) && NVME_CC_EN(n->bar.cc)) { trace_pci_nvme_mmio_stopped(); nvme_clear_ctrl(n); n->bar.csts &= ~NVME_CSTS_READY; } if (NVME_CC_SHN(data) && !(NVME_CC_SHN(n->bar.cc))) { trace_pci_nvme_mmio_shutdown_set(); nvme_clear_ctrl(n); n->bar.cc = data; n->bar.csts |= NVME_CSTS_SHST_COMPLETE; } else if (!NVME_CC_SHN(data) && NVME_CC_SHN(n->bar.cc)) { trace_pci_nvme_mmio_shutdown_cleared(); n->bar.csts &= ~NVME_CSTS_SHST_COMPLETE; n->bar.cc = data; } break; case 0x1C: /* CSTS */ if (data & (1 << 4)) { NVME_GUEST_ERR(pci_nvme_ub_mmiowr_ssreset_w1c_unsupported, "attempted to W1C CSTS.NSSRO" " but CAP.NSSRS is zero (not supported)"); } else if (data != 0) { NVME_GUEST_ERR(pci_nvme_ub_mmiowr_ro_csts, "attempted to set a read only bit" " of controller status"); } break; case 0x20: /* NSSR */ if (data == 0x4E564D65) { trace_pci_nvme_ub_mmiowr_ssreset_unsupported(); } else { /* The spec says that writes of other values have no effect */ return; } break; case 0x24: /* AQA */ n->bar.aqa = data & 0xffffffff; trace_pci_nvme_mmio_aqattr(data & 0xffffffff); break; case 0x28: /* ASQ */ n->bar.asq = data; trace_pci_nvme_mmio_asqaddr(data); break; case 0x2c: /* ASQ hi */ n->bar.asq |= data << 32; trace_pci_nvme_mmio_asqaddr_hi(data, n->bar.asq); break; case 0x30: /* ACQ */ trace_pci_nvme_mmio_acqaddr(data); n->bar.acq = data; break; case 0x34: /* ACQ hi */ n->bar.acq |= data << 32; trace_pci_nvme_mmio_acqaddr_hi(data, n->bar.acq); break; case 0x38: /* CMBLOC */ NVME_GUEST_ERR(pci_nvme_ub_mmiowr_cmbloc_reserved, "invalid write to reserved CMBLOC" " when CMBSZ is zero, ignored"); return; case 0x3C: /* CMBSZ */ NVME_GUEST_ERR(pci_nvme_ub_mmiowr_cmbsz_readonly, "invalid write to read only CMBSZ, ignored"); return; case 0xE00: /* PMRCAP */ NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrcap_readonly, "invalid write to PMRCAP register, ignored"); return; case 0xE04: /* TODO PMRCTL */ break; case 0xE08: /* PMRSTS */ NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrsts_readonly, "invalid write to PMRSTS register, ignored"); return; case 0xE0C: /* PMREBS */ NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrebs_readonly, "invalid write to PMREBS register, ignored"); return; case 0xE10: /* PMRSWTP */ NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrswtp_readonly, "invalid write to PMRSWTP register, ignored"); return; case 0xE14: /* TODO PMRMSC */ break; default: NVME_GUEST_ERR(pci_nvme_ub_mmiowr_invalid, "invalid MMIO write," " offset=0x%"PRIx64", data=%"PRIx64"", offset, data); break; } } static uint64_t nvme_mmio_read(void *opaque, hwaddr addr, unsigned size) { NvmeCtrl *n = (NvmeCtrl *)opaque; uint8_t *ptr = (uint8_t *)&n->bar; uint64_t val = 0; if (unlikely(addr & (sizeof(uint32_t) - 1))) { NVME_GUEST_ERR(pci_nvme_ub_mmiord_misaligned32, "MMIO read not 32-bit aligned," " offset=0x%"PRIx64"", addr); /* should RAZ, fall through for now */ } else if (unlikely(size < sizeof(uint32_t))) { NVME_GUEST_ERR(pci_nvme_ub_mmiord_toosmall, "MMIO read smaller than 32-bits," " offset=0x%"PRIx64"", addr); /* should RAZ, fall through for now */ } if (addr < sizeof(n->bar)) { /* * When PMRWBM bit 1 is set then read from * from PMRSTS should ensure prior writes * made it to persistent media */ if (addr == 0xE08 && (NVME_PMRCAP_PMRWBM(n->bar.pmrcap) & 0x02)) { memory_region_msync(&n->pmrdev->mr, 0, n->pmrdev->size); } memcpy(&val, ptr + addr, size); } else { NVME_GUEST_ERR(pci_nvme_ub_mmiord_invalid_ofs, "MMIO read beyond last register," " offset=0x%"PRIx64", returning 0", addr); } return val; } static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val) { uint32_t qid; if (unlikely(addr & ((1 << 2) - 1))) { NVME_GUEST_ERR(pci_nvme_ub_db_wr_misaligned, "doorbell write not 32-bit aligned," " offset=0x%"PRIx64", ignoring", addr); return; } if (((addr - 0x1000) >> 2) & 1) { /* Completion queue doorbell write */ uint16_t new_head = val & 0xffff; int start_sqs; NvmeCQueue *cq; qid = (addr - (0x1000 + (1 << 2))) >> 3; if (unlikely(nvme_check_cqid(n, qid))) { NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_cq, "completion queue doorbell write" " for nonexistent queue," " sqid=%"PRIu32", ignoring", qid); return; } cq = n->cq[qid]; if (unlikely(new_head >= cq->size)) { NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_cqhead, "completion queue doorbell write value" " beyond queue size, sqid=%"PRIu32"," " new_head=%"PRIu16", ignoring", qid, new_head); return; } start_sqs = nvme_cq_full(cq) ? 1 : 0; cq->head = new_head; if (start_sqs) { NvmeSQueue *sq; QTAILQ_FOREACH(sq, &cq->sq_list, entry) { timer_mod(sq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500); } timer_mod(cq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500); } if (cq->tail == cq->head) { nvme_irq_deassert(n, cq); } } else { /* Submission queue doorbell write */ uint16_t new_tail = val & 0xffff; NvmeSQueue *sq; qid = (addr - 0x1000) >> 3; if (unlikely(nvme_check_sqid(n, qid))) { NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_sq, "submission queue doorbell write" " for nonexistent queue," " sqid=%"PRIu32", ignoring", qid); return; } sq = n->sq[qid]; if (unlikely(new_tail >= sq->size)) { NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_sqtail, "submission queue doorbell write value" " beyond queue size, sqid=%"PRIu32"," " new_tail=%"PRIu16", ignoring", qid, new_tail); return; } sq->tail = new_tail; timer_mod(sq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500); } } static void nvme_mmio_write(void *opaque, hwaddr addr, uint64_t data, unsigned size) { NvmeCtrl *n = (NvmeCtrl *)opaque; if (addr < sizeof(n->bar)) { nvme_write_bar(n, addr, data, size); } else if (addr >= 0x1000) { nvme_process_db(n, addr, data); } } static const MemoryRegionOps nvme_mmio_ops = { .read = nvme_mmio_read, .write = nvme_mmio_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 2, .max_access_size = 8, }, }; static void nvme_cmb_write(void *opaque, hwaddr addr, uint64_t data, unsigned size) { NvmeCtrl *n = (NvmeCtrl *)opaque; stn_le_p(&n->cmbuf[addr], size, data); } static uint64_t nvme_cmb_read(void *opaque, hwaddr addr, unsigned size) { NvmeCtrl *n = (NvmeCtrl *)opaque; return ldn_le_p(&n->cmbuf[addr], size); } static const MemoryRegionOps nvme_cmb_ops = { .read = nvme_cmb_read, .write = nvme_cmb_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 1, .max_access_size = 8, }, }; static void nvme_check_constraints(NvmeCtrl *n, Error **errp) { NvmeParams *params = &n->params; if (params->num_queues) { warn_report("num_queues is deprecated; please use max_ioqpairs " "instead"); params->max_ioqpairs = params->num_queues - 1; } if (params->max_ioqpairs < 1 || params->max_ioqpairs > NVME_MAX_IOQPAIRS) { error_setg(errp, "max_ioqpairs must be between 1 and %d", NVME_MAX_IOQPAIRS); return; } if (params->msix_qsize < 1 || params->msix_qsize > PCI_MSIX_FLAGS_QSIZE + 1) { error_setg(errp, "msix_qsize must be between 1 and %d", PCI_MSIX_FLAGS_QSIZE + 1); return; } if (!n->conf.blk) { error_setg(errp, "drive property not set"); return; } if (!params->serial) { error_setg(errp, "serial property not set"); return; } if (!n->params.cmb_size_mb && n->pmrdev) { if (host_memory_backend_is_mapped(n->pmrdev)) { char *path = object_get_canonical_path_component(OBJECT(n->pmrdev)); error_setg(errp, "can't use already busy memdev: %s", path); g_free(path); return; } if (!is_power_of_2(n->pmrdev->size)) { error_setg(errp, "pmr backend size needs to be power of 2 in size"); return; } host_memory_backend_set_mapped(n->pmrdev, true); } } static void nvme_init_state(NvmeCtrl *n) { n->num_namespaces = 1; /* add one to max_ioqpairs to account for the admin queue pair */ n->reg_size = pow2ceil(NVME_REG_SIZE + 2 * (n->params.max_ioqpairs + 1) * NVME_DB_SIZE); n->namespaces = g_new0(NvmeNamespace, n->num_namespaces); n->sq = g_new0(NvmeSQueue *, n->params.max_ioqpairs + 1); n->cq = g_new0(NvmeCQueue *, n->params.max_ioqpairs + 1); } static void nvme_init_blk(NvmeCtrl *n, Error **errp) { blkconf_blocksizes(&n->conf); blkconf_apply_backend_options(&n->conf, blk_is_read_only(n->conf.blk), false, errp); } static void nvme_init_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp) { int64_t bs_size; NvmeIdNs *id_ns = &ns->id_ns; bs_size = blk_getlength(n->conf.blk); if (bs_size < 0) { error_setg_errno(errp, -bs_size, "could not get backing file size"); return; } n->ns_size = bs_size; id_ns->lbaf[0].ds = BDRV_SECTOR_BITS; id_ns->nsze = cpu_to_le64(nvme_ns_nlbas(n, ns)); /* no thin provisioning */ id_ns->ncap = id_ns->nsze; id_ns->nuse = id_ns->ncap; } static void nvme_init_cmb(NvmeCtrl *n, PCIDevice *pci_dev) { NVME_CMBLOC_SET_BIR(n->bar.cmbloc, NVME_CMB_BIR); NVME_CMBLOC_SET_OFST(n->bar.cmbloc, 0); NVME_CMBSZ_SET_SQS(n->bar.cmbsz, 1); NVME_CMBSZ_SET_CQS(n->bar.cmbsz, 0); NVME_CMBSZ_SET_LISTS(n->bar.cmbsz, 0); NVME_CMBSZ_SET_RDS(n->bar.cmbsz, 1); NVME_CMBSZ_SET_WDS(n->bar.cmbsz, 1); NVME_CMBSZ_SET_SZU(n->bar.cmbsz, 2); /* MBs */ NVME_CMBSZ_SET_SZ(n->bar.cmbsz, n->params.cmb_size_mb); n->cmbuf = g_malloc0(NVME_CMBSZ_GETSIZE(n->bar.cmbsz)); memory_region_init_io(&n->ctrl_mem, OBJECT(n), &nvme_cmb_ops, n, "nvme-cmb", NVME_CMBSZ_GETSIZE(n->bar.cmbsz)); pci_register_bar(pci_dev, NVME_CMBLOC_BIR(n->bar.cmbloc), PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64 | PCI_BASE_ADDRESS_MEM_PREFETCH, &n->ctrl_mem); } static void nvme_init_pmr(NvmeCtrl *n, PCIDevice *pci_dev) { /* Controller Capabilities register */ NVME_CAP_SET_PMRS(n->bar.cap, 1); /* PMR Capabities register */ n->bar.pmrcap = 0; NVME_PMRCAP_SET_RDS(n->bar.pmrcap, 0); NVME_PMRCAP_SET_WDS(n->bar.pmrcap, 0); NVME_PMRCAP_SET_BIR(n->bar.pmrcap, NVME_PMR_BIR); NVME_PMRCAP_SET_PMRTU(n->bar.pmrcap, 0); /* Turn on bit 1 support */ NVME_PMRCAP_SET_PMRWBM(n->bar.pmrcap, 0x02); NVME_PMRCAP_SET_PMRTO(n->bar.pmrcap, 0); NVME_PMRCAP_SET_CMSS(n->bar.pmrcap, 0); /* PMR Control register */ n->bar.pmrctl = 0; NVME_PMRCTL_SET_EN(n->bar.pmrctl, 0); /* PMR Status register */ n->bar.pmrsts = 0; NVME_PMRSTS_SET_ERR(n->bar.pmrsts, 0); NVME_PMRSTS_SET_NRDY(n->bar.pmrsts, 0); NVME_PMRSTS_SET_HSTS(n->bar.pmrsts, 0); NVME_PMRSTS_SET_CBAI(n->bar.pmrsts, 0); /* PMR Elasticity Buffer Size register */ n->bar.pmrebs = 0; NVME_PMREBS_SET_PMRSZU(n->bar.pmrebs, 0); NVME_PMREBS_SET_RBB(n->bar.pmrebs, 0); NVME_PMREBS_SET_PMRWBZ(n->bar.pmrebs, 0); /* PMR Sustained Write Throughput register */ n->bar.pmrswtp = 0; NVME_PMRSWTP_SET_PMRSWTU(n->bar.pmrswtp, 0); NVME_PMRSWTP_SET_PMRSWTV(n->bar.pmrswtp, 0); /* PMR Memory Space Control register */ n->bar.pmrmsc = 0; NVME_PMRMSC_SET_CMSE(n->bar.pmrmsc, 0); NVME_PMRMSC_SET_CBA(n->bar.pmrmsc, 0); pci_register_bar(pci_dev, NVME_PMRCAP_BIR(n->bar.pmrcap), PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64 | PCI_BASE_ADDRESS_MEM_PREFETCH, &n->pmrdev->mr); } static void nvme_init_pci(NvmeCtrl *n, PCIDevice *pci_dev, Error **errp) { uint8_t *pci_conf = pci_dev->config; pci_conf[PCI_INTERRUPT_PIN] = 1; pci_config_set_prog_interface(pci_conf, 0x2); pci_config_set_class(pci_conf, PCI_CLASS_STORAGE_EXPRESS); pcie_endpoint_cap_init(pci_dev, 0x80); memory_region_init_io(&n->iomem, OBJECT(n), &nvme_mmio_ops, n, "nvme", n->reg_size); pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64, &n->iomem); if (msix_init_exclusive_bar(pci_dev, n->params.msix_qsize, 4, errp)) { return; } if (n->params.cmb_size_mb) { nvme_init_cmb(n, pci_dev); } else if (n->pmrdev) { nvme_init_pmr(n, pci_dev); } } static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev) { NvmeIdCtrl *id = &n->id_ctrl; uint8_t *pci_conf = pci_dev->config; id->vid = cpu_to_le16(pci_get_word(pci_conf + PCI_VENDOR_ID)); id->ssvid = cpu_to_le16(pci_get_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID)); strpadcpy((char *)id->mn, sizeof(id->mn), "QEMU NVMe Ctrl", ' '); strpadcpy((char *)id->fr, sizeof(id->fr), "1.0", ' '); strpadcpy((char *)id->sn, sizeof(id->sn), n->params.serial, ' '); id->rab = 6; id->ieee[0] = 0x00; id->ieee[1] = 0x02; id->ieee[2] = 0xb3; id->oacs = cpu_to_le16(0); id->frmw = 7 << 1; id->lpa = 1 << 0; id->sqes = (0x6 << 4) | 0x6; id->cqes = (0x4 << 4) | 0x4; id->nn = cpu_to_le32(n->num_namespaces); id->oncs = cpu_to_le16(NVME_ONCS_WRITE_ZEROS | NVME_ONCS_TIMESTAMP); id->psd[0].mp = cpu_to_le16(0x9c4); id->psd[0].enlat = cpu_to_le32(0x10); id->psd[0].exlat = cpu_to_le32(0x4); if (blk_enable_write_cache(n->conf.blk)) { id->vwc = 1; } n->bar.cap = 0; NVME_CAP_SET_MQES(n->bar.cap, 0x7ff); NVME_CAP_SET_CQR(n->bar.cap, 1); NVME_CAP_SET_TO(n->bar.cap, 0xf); NVME_CAP_SET_CSS(n->bar.cap, 1); NVME_CAP_SET_MPSMAX(n->bar.cap, 4); n->bar.vs = 0x00010200; n->bar.intmc = n->bar.intms = 0; } static void nvme_realize(PCIDevice *pci_dev, Error **errp) { NvmeCtrl *n = NVME(pci_dev); Error *local_err = NULL; int i; nvme_check_constraints(n, &local_err); if (local_err) { error_propagate(errp, local_err); return; } nvme_init_state(n); nvme_init_blk(n, &local_err); if (local_err) { error_propagate(errp, local_err); return; } nvme_init_pci(n, pci_dev, &local_err); if (local_err) { error_propagate(errp, local_err); return; } nvme_init_ctrl(n, pci_dev); for (i = 0; i < n->num_namespaces; i++) { nvme_init_namespace(n, &n->namespaces[i], &local_err); if (local_err) { error_propagate(errp, local_err); return; } } } static void nvme_exit(PCIDevice *pci_dev) { NvmeCtrl *n = NVME(pci_dev); nvme_clear_ctrl(n); g_free(n->namespaces); g_free(n->cq); g_free(n->sq); if (n->params.cmb_size_mb) { g_free(n->cmbuf); } if (n->pmrdev) { host_memory_backend_set_mapped(n->pmrdev, false); } msix_uninit_exclusive_bar(pci_dev); } static Property nvme_props[] = { DEFINE_BLOCK_PROPERTIES(NvmeCtrl, conf), DEFINE_PROP_LINK("pmrdev", NvmeCtrl, pmrdev, TYPE_MEMORY_BACKEND, HostMemoryBackend *), DEFINE_PROP_STRING("serial", NvmeCtrl, params.serial), DEFINE_PROP_UINT32("cmb_size_mb", NvmeCtrl, params.cmb_size_mb, 0), DEFINE_PROP_UINT32("num_queues", NvmeCtrl, params.num_queues, 0), DEFINE_PROP_UINT32("max_ioqpairs", NvmeCtrl, params.max_ioqpairs, 64), DEFINE_PROP_UINT16("msix_qsize", NvmeCtrl, params.msix_qsize, 65), DEFINE_PROP_END_OF_LIST(), }; static const VMStateDescription nvme_vmstate = { .name = "nvme", .unmigratable = 1, }; static void nvme_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc); pc->realize = nvme_realize; pc->exit = nvme_exit; pc->class_id = PCI_CLASS_STORAGE_EXPRESS; pc->vendor_id = PCI_VENDOR_ID_INTEL; pc->device_id = 0x5845; pc->revision = 2; set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); dc->desc = "Non-Volatile Memory Express"; device_class_set_props(dc, nvme_props); dc->vmsd = &nvme_vmstate; } static void nvme_instance_init(Object *obj) { NvmeCtrl *s = NVME(obj); device_add_bootindex_property(obj, &s->conf.bootindex, "bootindex", "/namespace@1,0", DEVICE(obj)); } static const TypeInfo nvme_info = { .name = TYPE_NVME, .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(NvmeCtrl), .class_init = nvme_class_init, .instance_init = nvme_instance_init, .interfaces = (InterfaceInfo[]) { { INTERFACE_PCIE_DEVICE }, { } }, }; static void nvme_register_types(void) { type_register_static(&nvme_info); } type_init(nvme_register_types)