| /* |
| * QEMU paravirtual RDMA - Generic RDMA backend |
| * |
| * Copyright (C) 2018 Oracle |
| * Copyright (C) 2018 Red Hat Inc |
| * |
| * Authors: |
| * Yuval Shaia <yuval.shaia@oracle.com> |
| * Marcel Apfelbaum <marcel@redhat.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/qapi-events-rdma.h" |
| |
| #include <infiniband/verbs.h> |
| |
| #include "contrib/rdmacm-mux/rdmacm-mux.h" |
| #include "trace.h" |
| #include "rdma_utils.h" |
| #include "rdma_rm.h" |
| #include "rdma_backend.h" |
| |
| #define THR_NAME_LEN 16 |
| #define THR_POLL_TO 5000 |
| |
| #define MAD_HDR_SIZE sizeof(struct ibv_grh) |
| |
| typedef struct BackendCtx { |
| void *up_ctx; |
| struct ibv_sge sge; /* Used to save MAD recv buffer */ |
| RdmaBackendQP *backend_qp; /* To maintain recv buffers */ |
| RdmaBackendSRQ *backend_srq; |
| } BackendCtx; |
| |
| struct backend_umad { |
| struct ib_user_mad hdr; |
| char mad[RDMA_MAX_PRIVATE_DATA]; |
| }; |
| |
| static void (*comp_handler)(void *ctx, struct ibv_wc *wc); |
| |
| static void dummy_comp_handler(void *ctx, struct ibv_wc *wc) |
| { |
| rdma_error_report("No completion handler is registered"); |
| } |
| |
| static inline void complete_work(enum ibv_wc_status status, uint32_t vendor_err, |
| void *ctx) |
| { |
| struct ibv_wc wc = {}; |
| |
| wc.status = status; |
| wc.vendor_err = vendor_err; |
| |
| comp_handler(ctx, &wc); |
| } |
| |
| static void free_cqe_ctx(gpointer data, gpointer user_data) |
| { |
| BackendCtx *bctx; |
| RdmaDeviceResources *rdma_dev_res = user_data; |
| unsigned long cqe_ctx_id = GPOINTER_TO_INT(data); |
| |
| bctx = rdma_rm_get_cqe_ctx(rdma_dev_res, cqe_ctx_id); |
| if (bctx) { |
| rdma_rm_dealloc_cqe_ctx(rdma_dev_res, cqe_ctx_id); |
| atomic_dec(&rdma_dev_res->stats.missing_cqe); |
| } |
| g_free(bctx); |
| } |
| |
| static void clean_recv_mads(RdmaBackendDev *backend_dev) |
| { |
| unsigned long cqe_ctx_id; |
| |
| do { |
| cqe_ctx_id = rdma_protected_qlist_pop_int64(&backend_dev-> |
| recv_mads_list); |
| if (cqe_ctx_id != -ENOENT) { |
| atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); |
| free_cqe_ctx(GINT_TO_POINTER(cqe_ctx_id), |
| backend_dev->rdma_dev_res); |
| } |
| } while (cqe_ctx_id != -ENOENT); |
| } |
| |
| static int rdma_poll_cq(RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq) |
| { |
| int i, ne, total_ne = 0; |
| BackendCtx *bctx; |
| struct ibv_wc wc[2]; |
| RdmaProtectedGSList *cqe_ctx_list; |
| |
| qemu_mutex_lock(&rdma_dev_res->lock); |
| do { |
| ne = ibv_poll_cq(ibcq, ARRAY_SIZE(wc), wc); |
| |
| trace_rdma_poll_cq(ne, ibcq); |
| |
| for (i = 0; i < ne; i++) { |
| bctx = rdma_rm_get_cqe_ctx(rdma_dev_res, wc[i].wr_id); |
| if (unlikely(!bctx)) { |
| rdma_error_report("No matching ctx for req %"PRId64, |
| wc[i].wr_id); |
| continue; |
| } |
| |
| comp_handler(bctx->up_ctx, &wc[i]); |
| |
| if (bctx->backend_qp) { |
| cqe_ctx_list = &bctx->backend_qp->cqe_ctx_list; |
| } else { |
| cqe_ctx_list = &bctx->backend_srq->cqe_ctx_list; |
| } |
| |
| rdma_protected_gslist_remove_int32(cqe_ctx_list, wc[i].wr_id); |
| rdma_rm_dealloc_cqe_ctx(rdma_dev_res, wc[i].wr_id); |
| g_free(bctx); |
| } |
| total_ne += ne; |
| } while (ne > 0); |
| atomic_sub(&rdma_dev_res->stats.missing_cqe, total_ne); |
| qemu_mutex_unlock(&rdma_dev_res->lock); |
| |
| if (ne < 0) { |
| rdma_error_report("ibv_poll_cq fail, rc=%d, errno=%d", ne, errno); |
| } |
| |
| rdma_dev_res->stats.completions += total_ne; |
| |
| return total_ne; |
| } |
| |
| static void *comp_handler_thread(void *arg) |
| { |
| RdmaBackendDev *backend_dev = (RdmaBackendDev *)arg; |
| int rc; |
| struct ibv_cq *ev_cq; |
| void *ev_ctx; |
| int flags; |
| GPollFD pfds[1]; |
| |
| /* Change to non-blocking mode */ |
| flags = fcntl(backend_dev->channel->fd, F_GETFL); |
| rc = fcntl(backend_dev->channel->fd, F_SETFL, flags | O_NONBLOCK); |
| if (rc < 0) { |
| rdma_error_report("Failed to change backend channel FD to non-blocking"); |
| return NULL; |
| } |
| |
| pfds[0].fd = backend_dev->channel->fd; |
| pfds[0].events = G_IO_IN | G_IO_HUP | G_IO_ERR; |
| |
| backend_dev->comp_thread.is_running = true; |
| |
| while (backend_dev->comp_thread.run) { |
| do { |
| rc = qemu_poll_ns(pfds, 1, THR_POLL_TO * (int64_t)SCALE_MS); |
| if (!rc) { |
| backend_dev->rdma_dev_res->stats.poll_cq_ppoll_to++; |
| } |
| } while (!rc && backend_dev->comp_thread.run); |
| |
| if (backend_dev->comp_thread.run) { |
| rc = ibv_get_cq_event(backend_dev->channel, &ev_cq, &ev_ctx); |
| if (unlikely(rc)) { |
| rdma_error_report("ibv_get_cq_event fail, rc=%d, errno=%d", rc, |
| errno); |
| continue; |
| } |
| |
| rc = ibv_req_notify_cq(ev_cq, 0); |
| if (unlikely(rc)) { |
| rdma_error_report("ibv_req_notify_cq fail, rc=%d, errno=%d", rc, |
| errno); |
| } |
| |
| backend_dev->rdma_dev_res->stats.poll_cq_from_bk++; |
| rdma_poll_cq(backend_dev->rdma_dev_res, ev_cq); |
| |
| ibv_ack_cq_events(ev_cq, 1); |
| } |
| } |
| |
| backend_dev->comp_thread.is_running = false; |
| |
| qemu_thread_exit(0); |
| |
| return NULL; |
| } |
| |
| static inline void disable_rdmacm_mux_async(RdmaBackendDev *backend_dev) |
| { |
| atomic_set(&backend_dev->rdmacm_mux.can_receive, 0); |
| } |
| |
| static inline void enable_rdmacm_mux_async(RdmaBackendDev *backend_dev) |
| { |
| atomic_set(&backend_dev->rdmacm_mux.can_receive, sizeof(RdmaCmMuxMsg)); |
| } |
| |
| static inline int rdmacm_mux_can_process_async(RdmaBackendDev *backend_dev) |
| { |
| return atomic_read(&backend_dev->rdmacm_mux.can_receive); |
| } |
| |
| static int rdmacm_mux_check_op_status(CharBackend *mad_chr_be) |
| { |
| RdmaCmMuxMsg msg = {}; |
| int ret; |
| |
| ret = qemu_chr_fe_read_all(mad_chr_be, (uint8_t *)&msg, sizeof(msg)); |
| if (ret != sizeof(msg)) { |
| rdma_error_report("Got invalid message from mux: size %d, expecting %d", |
| ret, (int)sizeof(msg)); |
| return -EIO; |
| } |
| |
| trace_rdmacm_mux_check_op_status(msg.hdr.msg_type, msg.hdr.op_code, |
| msg.hdr.err_code); |
| |
| if (msg.hdr.msg_type != RDMACM_MUX_MSG_TYPE_RESP) { |
| rdma_error_report("Got invalid message type %d", msg.hdr.msg_type); |
| return -EIO; |
| } |
| |
| if (msg.hdr.err_code != RDMACM_MUX_ERR_CODE_OK) { |
| rdma_error_report("Operation failed in mux, error code %d", |
| msg.hdr.err_code); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int rdmacm_mux_send(RdmaBackendDev *backend_dev, RdmaCmMuxMsg *msg) |
| { |
| int rc = 0; |
| |
| msg->hdr.msg_type = RDMACM_MUX_MSG_TYPE_REQ; |
| trace_rdmacm_mux("send", msg->hdr.msg_type, msg->hdr.op_code); |
| disable_rdmacm_mux_async(backend_dev); |
| rc = qemu_chr_fe_write(backend_dev->rdmacm_mux.chr_be, |
| (const uint8_t *)msg, sizeof(*msg)); |
| if (rc != sizeof(*msg)) { |
| enable_rdmacm_mux_async(backend_dev); |
| rdma_error_report("Failed to send request to rdmacm_mux (rc=%d)", rc); |
| return -EIO; |
| } |
| |
| rc = rdmacm_mux_check_op_status(backend_dev->rdmacm_mux.chr_be); |
| if (rc) { |
| rdma_error_report("Failed to execute rdmacm_mux request %d (rc=%d)", |
| msg->hdr.op_code, rc); |
| } |
| |
| enable_rdmacm_mux_async(backend_dev); |
| |
| return 0; |
| } |
| |
| static void stop_backend_thread(RdmaBackendThread *thread) |
| { |
| thread->run = false; |
| while (thread->is_running) { |
| sleep(THR_POLL_TO / SCALE_US / 2); |
| } |
| } |
| |
| static void start_comp_thread(RdmaBackendDev *backend_dev) |
| { |
| char thread_name[THR_NAME_LEN] = {}; |
| |
| stop_backend_thread(&backend_dev->comp_thread); |
| |
| snprintf(thread_name, sizeof(thread_name), "rdma_comp_%s", |
| ibv_get_device_name(backend_dev->ib_dev)); |
| backend_dev->comp_thread.run = true; |
| qemu_thread_create(&backend_dev->comp_thread.thread, thread_name, |
| comp_handler_thread, backend_dev, QEMU_THREAD_DETACHED); |
| } |
| |
| void rdma_backend_register_comp_handler(void (*handler)(void *ctx, |
| struct ibv_wc *wc)) |
| { |
| comp_handler = handler; |
| } |
| |
| void rdma_backend_unregister_comp_handler(void) |
| { |
| rdma_backend_register_comp_handler(dummy_comp_handler); |
| } |
| |
| int rdma_backend_query_port(RdmaBackendDev *backend_dev, |
| struct ibv_port_attr *port_attr) |
| { |
| int rc; |
| |
| rc = ibv_query_port(backend_dev->context, backend_dev->port_num, port_attr); |
| if (rc) { |
| rdma_error_report("ibv_query_port fail, rc=%d, errno=%d", rc, errno); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq) |
| { |
| int polled; |
| |
| rdma_dev_res->stats.poll_cq_from_guest++; |
| polled = rdma_poll_cq(rdma_dev_res, cq->ibcq); |
| if (!polled) { |
| rdma_dev_res->stats.poll_cq_from_guest_empty++; |
| } |
| } |
| |
| static GHashTable *ah_hash; |
| |
| static struct ibv_ah *create_ah(RdmaBackendDev *backend_dev, struct ibv_pd *pd, |
| uint8_t sgid_idx, union ibv_gid *dgid) |
| { |
| GBytes *ah_key = g_bytes_new(dgid, sizeof(*dgid)); |
| struct ibv_ah *ah = g_hash_table_lookup(ah_hash, ah_key); |
| |
| if (ah) { |
| trace_rdma_create_ah_cache_hit(be64_to_cpu(dgid->global.subnet_prefix), |
| be64_to_cpu(dgid->global.interface_id)); |
| g_bytes_unref(ah_key); |
| } else { |
| struct ibv_ah_attr ah_attr = { |
| .is_global = 1, |
| .port_num = backend_dev->port_num, |
| .grh.hop_limit = 1, |
| }; |
| |
| ah_attr.grh.dgid = *dgid; |
| ah_attr.grh.sgid_index = sgid_idx; |
| |
| ah = ibv_create_ah(pd, &ah_attr); |
| if (ah) { |
| g_hash_table_insert(ah_hash, ah_key, ah); |
| } else { |
| g_bytes_unref(ah_key); |
| rdma_error_report("Failed to create AH for gid <0x%" PRIx64", 0x%"PRIx64">", |
| be64_to_cpu(dgid->global.subnet_prefix), |
| be64_to_cpu(dgid->global.interface_id)); |
| } |
| |
| trace_rdma_create_ah_cache_miss(be64_to_cpu(dgid->global.subnet_prefix), |
| be64_to_cpu(dgid->global.interface_id)); |
| } |
| |
| return ah; |
| } |
| |
| static void destroy_ah_hash_key(gpointer data) |
| { |
| g_bytes_unref(data); |
| } |
| |
| static void destroy_ah_hast_data(gpointer data) |
| { |
| struct ibv_ah *ah = data; |
| |
| ibv_destroy_ah(ah); |
| } |
| |
| static void ah_cache_init(void) |
| { |
| ah_hash = g_hash_table_new_full(g_bytes_hash, g_bytes_equal, |
| destroy_ah_hash_key, destroy_ah_hast_data); |
| } |
| |
| static int build_host_sge_array(RdmaDeviceResources *rdma_dev_res, |
| struct ibv_sge *dsge, struct ibv_sge *ssge, |
| uint8_t num_sge, uint64_t *total_length) |
| { |
| RdmaRmMR *mr; |
| int ssge_idx; |
| |
| for (ssge_idx = 0; ssge_idx < num_sge; ssge_idx++) { |
| mr = rdma_rm_get_mr(rdma_dev_res, ssge[ssge_idx].lkey); |
| if (unlikely(!mr)) { |
| rdma_error_report("Invalid lkey 0x%x", ssge[ssge_idx].lkey); |
| return VENDOR_ERR_INVLKEY | ssge[ssge_idx].lkey; |
| } |
| |
| #ifdef LEGACY_RDMA_REG_MR |
| dsge->addr = (uintptr_t)mr->virt + ssge[ssge_idx].addr - mr->start; |
| #else |
| dsge->addr = ssge[ssge_idx].addr; |
| #endif |
| dsge->length = ssge[ssge_idx].length; |
| dsge->lkey = rdma_backend_mr_lkey(&mr->backend_mr); |
| |
| *total_length += dsge->length; |
| |
| dsge++; |
| } |
| |
| return 0; |
| } |
| |
| static void trace_mad_message(const char *title, char *buf, int len) |
| { |
| int i; |
| char *b = g_malloc0(len * 3 + 1); |
| char b1[4]; |
| |
| for (i = 0; i < len; i++) { |
| sprintf(b1, "%.2X ", buf[i] & 0x000000FF); |
| strcat(b, b1); |
| } |
| |
| trace_rdma_mad_message(title, len, b); |
| |
| g_free(b); |
| } |
| |
| static int mad_send(RdmaBackendDev *backend_dev, uint8_t sgid_idx, |
| union ibv_gid *sgid, struct ibv_sge *sge, uint32_t num_sge) |
| { |
| RdmaCmMuxMsg msg = {}; |
| char *hdr, *data; |
| int ret; |
| |
| if (num_sge != 2) { |
| return -EINVAL; |
| } |
| |
| msg.hdr.op_code = RDMACM_MUX_OP_CODE_MAD; |
| memcpy(msg.hdr.sgid.raw, sgid->raw, sizeof(msg.hdr.sgid)); |
| |
| msg.umad_len = sge[0].length + sge[1].length; |
| |
| if (msg.umad_len > sizeof(msg.umad.mad)) { |
| return -ENOMEM; |
| } |
| |
| msg.umad.hdr.addr.qpn = htobe32(1); |
| msg.umad.hdr.addr.grh_present = 1; |
| msg.umad.hdr.addr.gid_index = sgid_idx; |
| memcpy(msg.umad.hdr.addr.gid, sgid->raw, sizeof(msg.umad.hdr.addr.gid)); |
| msg.umad.hdr.addr.hop_limit = 0xFF; |
| |
| hdr = rdma_pci_dma_map(backend_dev->dev, sge[0].addr, sge[0].length); |
| if (!hdr) { |
| return -ENOMEM; |
| } |
| data = rdma_pci_dma_map(backend_dev->dev, sge[1].addr, sge[1].length); |
| if (!data) { |
| rdma_pci_dma_unmap(backend_dev->dev, hdr, sge[0].length); |
| return -ENOMEM; |
| } |
| |
| memcpy(&msg.umad.mad[0], hdr, sge[0].length); |
| memcpy(&msg.umad.mad[sge[0].length], data, sge[1].length); |
| |
| rdma_pci_dma_unmap(backend_dev->dev, data, sge[1].length); |
| rdma_pci_dma_unmap(backend_dev->dev, hdr, sge[0].length); |
| |
| trace_mad_message("send", msg.umad.mad, msg.umad_len); |
| |
| ret = rdmacm_mux_send(backend_dev, &msg); |
| if (ret) { |
| rdma_error_report("Failed to send MAD to rdma_umadmux (%d)", ret); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| void rdma_backend_post_send(RdmaBackendDev *backend_dev, |
| RdmaBackendQP *qp, uint8_t qp_type, |
| struct ibv_sge *sge, uint32_t num_sge, |
| uint8_t sgid_idx, union ibv_gid *sgid, |
| union ibv_gid *dgid, uint32_t dqpn, uint32_t dqkey, |
| void *ctx) |
| { |
| BackendCtx *bctx; |
| struct ibv_sge new_sge[MAX_SGE]; |
| uint32_t bctx_id; |
| int rc; |
| struct ibv_send_wr wr = {}, *bad_wr; |
| |
| if (!qp->ibqp) { /* This field is not initialized for QP0 and QP1 */ |
| if (qp_type == IBV_QPT_SMI) { |
| rdma_error_report("Got QP0 request"); |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx); |
| } else if (qp_type == IBV_QPT_GSI) { |
| rc = mad_send(backend_dev, sgid_idx, sgid, sge, num_sge); |
| if (rc) { |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_MAD_SEND, ctx); |
| backend_dev->rdma_dev_res->stats.mad_tx_err++; |
| } else { |
| complete_work(IBV_WC_SUCCESS, 0, ctx); |
| backend_dev->rdma_dev_res->stats.mad_tx++; |
| } |
| } |
| return; |
| } |
| |
| bctx = g_malloc0(sizeof(*bctx)); |
| bctx->up_ctx = ctx; |
| bctx->backend_qp = qp; |
| |
| rc = rdma_rm_alloc_cqe_ctx(backend_dev->rdma_dev_res, &bctx_id, bctx); |
| if (unlikely(rc)) { |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx); |
| goto err_free_bctx; |
| } |
| |
| rdma_protected_gslist_append_int32(&qp->cqe_ctx_list, bctx_id); |
| |
| rc = build_host_sge_array(backend_dev->rdma_dev_res, new_sge, sge, num_sge, |
| &backend_dev->rdma_dev_res->stats.tx_len); |
| if (rc) { |
| complete_work(IBV_WC_GENERAL_ERR, rc, ctx); |
| goto err_dealloc_cqe_ctx; |
| } |
| |
| if (qp_type == IBV_QPT_UD) { |
| wr.wr.ud.ah = create_ah(backend_dev, qp->ibpd, sgid_idx, dgid); |
| if (!wr.wr.ud.ah) { |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); |
| goto err_dealloc_cqe_ctx; |
| } |
| wr.wr.ud.remote_qpn = dqpn; |
| wr.wr.ud.remote_qkey = dqkey; |
| } |
| |
| wr.num_sge = num_sge; |
| wr.opcode = IBV_WR_SEND; |
| wr.send_flags = IBV_SEND_SIGNALED; |
| wr.sg_list = new_sge; |
| wr.wr_id = bctx_id; |
| |
| rc = ibv_post_send(qp->ibqp, &wr, &bad_wr); |
| if (rc) { |
| rdma_error_report("ibv_post_send fail, qpn=0x%x, rc=%d, errno=%d", |
| qp->ibqp->qp_num, rc, errno); |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); |
| goto err_dealloc_cqe_ctx; |
| } |
| |
| atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); |
| backend_dev->rdma_dev_res->stats.tx++; |
| |
| return; |
| |
| err_dealloc_cqe_ctx: |
| backend_dev->rdma_dev_res->stats.tx_err++; |
| rdma_rm_dealloc_cqe_ctx(backend_dev->rdma_dev_res, bctx_id); |
| |
| err_free_bctx: |
| g_free(bctx); |
| } |
| |
| static unsigned int save_mad_recv_buffer(RdmaBackendDev *backend_dev, |
| struct ibv_sge *sge, uint32_t num_sge, |
| void *ctx) |
| { |
| BackendCtx *bctx; |
| int rc; |
| uint32_t bctx_id; |
| |
| if (num_sge != 1) { |
| rdma_error_report("Invalid num_sge (%d), expecting 1", num_sge); |
| return VENDOR_ERR_INV_NUM_SGE; |
| } |
| |
| if (sge[0].length < RDMA_MAX_PRIVATE_DATA + sizeof(struct ibv_grh)) { |
| rdma_error_report("Too small buffer for MAD"); |
| return VENDOR_ERR_INV_MAD_BUFF; |
| } |
| |
| bctx = g_malloc0(sizeof(*bctx)); |
| |
| rc = rdma_rm_alloc_cqe_ctx(backend_dev->rdma_dev_res, &bctx_id, bctx); |
| if (unlikely(rc)) { |
| g_free(bctx); |
| return VENDOR_ERR_NOMEM; |
| } |
| |
| bctx->up_ctx = ctx; |
| bctx->sge = *sge; |
| |
| rdma_protected_qlist_append_int64(&backend_dev->recv_mads_list, bctx_id); |
| |
| return 0; |
| } |
| |
| void rdma_backend_post_recv(RdmaBackendDev *backend_dev, |
| RdmaBackendQP *qp, uint8_t qp_type, |
| struct ibv_sge *sge, uint32_t num_sge, void *ctx) |
| { |
| BackendCtx *bctx; |
| struct ibv_sge new_sge[MAX_SGE]; |
| uint32_t bctx_id; |
| int rc; |
| struct ibv_recv_wr wr = {}, *bad_wr; |
| |
| if (!qp->ibqp) { /* This field does not get initialized for QP0 and QP1 */ |
| if (qp_type == IBV_QPT_SMI) { |
| rdma_error_report("Got QP0 request"); |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx); |
| } |
| if (qp_type == IBV_QPT_GSI) { |
| rc = save_mad_recv_buffer(backend_dev, sge, num_sge, ctx); |
| if (rc) { |
| complete_work(IBV_WC_GENERAL_ERR, rc, ctx); |
| backend_dev->rdma_dev_res->stats.mad_rx_bufs_err++; |
| } else { |
| backend_dev->rdma_dev_res->stats.mad_rx_bufs++; |
| } |
| } |
| return; |
| } |
| |
| bctx = g_malloc0(sizeof(*bctx)); |
| bctx->up_ctx = ctx; |
| bctx->backend_qp = qp; |
| |
| rc = rdma_rm_alloc_cqe_ctx(backend_dev->rdma_dev_res, &bctx_id, bctx); |
| if (unlikely(rc)) { |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx); |
| goto err_free_bctx; |
| } |
| |
| rdma_protected_gslist_append_int32(&qp->cqe_ctx_list, bctx_id); |
| |
| rc = build_host_sge_array(backend_dev->rdma_dev_res, new_sge, sge, num_sge, |
| &backend_dev->rdma_dev_res->stats.rx_bufs_len); |
| if (rc) { |
| complete_work(IBV_WC_GENERAL_ERR, rc, ctx); |
| goto err_dealloc_cqe_ctx; |
| } |
| |
| wr.num_sge = num_sge; |
| wr.sg_list = new_sge; |
| wr.wr_id = bctx_id; |
| rc = ibv_post_recv(qp->ibqp, &wr, &bad_wr); |
| if (rc) { |
| rdma_error_report("ibv_post_recv fail, qpn=0x%x, rc=%d, errno=%d", |
| qp->ibqp->qp_num, rc, errno); |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); |
| goto err_dealloc_cqe_ctx; |
| } |
| |
| atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); |
| backend_dev->rdma_dev_res->stats.rx_bufs++; |
| |
| return; |
| |
| err_dealloc_cqe_ctx: |
| backend_dev->rdma_dev_res->stats.rx_bufs_err++; |
| rdma_rm_dealloc_cqe_ctx(backend_dev->rdma_dev_res, bctx_id); |
| |
| err_free_bctx: |
| g_free(bctx); |
| } |
| |
| void rdma_backend_post_srq_recv(RdmaBackendDev *backend_dev, |
| RdmaBackendSRQ *srq, struct ibv_sge *sge, |
| uint32_t num_sge, void *ctx) |
| { |
| BackendCtx *bctx; |
| struct ibv_sge new_sge[MAX_SGE]; |
| uint32_t bctx_id; |
| int rc; |
| struct ibv_recv_wr wr = {}, *bad_wr; |
| |
| bctx = g_malloc0(sizeof(*bctx)); |
| bctx->up_ctx = ctx; |
| bctx->backend_srq = srq; |
| |
| rc = rdma_rm_alloc_cqe_ctx(backend_dev->rdma_dev_res, &bctx_id, bctx); |
| if (unlikely(rc)) { |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx); |
| goto err_free_bctx; |
| } |
| |
| rdma_protected_gslist_append_int32(&srq->cqe_ctx_list, bctx_id); |
| |
| rc = build_host_sge_array(backend_dev->rdma_dev_res, new_sge, sge, num_sge, |
| &backend_dev->rdma_dev_res->stats.rx_bufs_len); |
| if (rc) { |
| complete_work(IBV_WC_GENERAL_ERR, rc, ctx); |
| goto err_dealloc_cqe_ctx; |
| } |
| |
| wr.num_sge = num_sge; |
| wr.sg_list = new_sge; |
| wr.wr_id = bctx_id; |
| rc = ibv_post_srq_recv(srq->ibsrq, &wr, &bad_wr); |
| if (rc) { |
| rdma_error_report("ibv_post_srq_recv fail, srqn=0x%x, rc=%d, errno=%d", |
| srq->ibsrq->handle, rc, errno); |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); |
| goto err_dealloc_cqe_ctx; |
| } |
| |
| atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); |
| backend_dev->rdma_dev_res->stats.rx_bufs++; |
| backend_dev->rdma_dev_res->stats.rx_srq++; |
| |
| return; |
| |
| err_dealloc_cqe_ctx: |
| backend_dev->rdma_dev_res->stats.rx_bufs_err++; |
| rdma_rm_dealloc_cqe_ctx(backend_dev->rdma_dev_res, bctx_id); |
| |
| err_free_bctx: |
| g_free(bctx); |
| } |
| |
| int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd) |
| { |
| pd->ibpd = ibv_alloc_pd(backend_dev->context); |
| |
| if (!pd->ibpd) { |
| rdma_error_report("ibv_alloc_pd fail, errno=%d", errno); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| void rdma_backend_destroy_pd(RdmaBackendPD *pd) |
| { |
| if (pd->ibpd) { |
| ibv_dealloc_pd(pd->ibpd); |
| } |
| } |
| |
| #ifdef LEGACY_RDMA_REG_MR |
| int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, void *addr, |
| size_t length, int access) |
| #else |
| int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, void *addr, |
| size_t length, uint64_t guest_start, int access) |
| #endif |
| { |
| #ifdef LEGACY_RDMA_REG_MR |
| mr->ibmr = ibv_reg_mr(pd->ibpd, addr, length, access); |
| #else |
| mr->ibmr = ibv_reg_mr_iova(pd->ibpd, addr, length, guest_start, access); |
| #endif |
| if (!mr->ibmr) { |
| rdma_error_report("ibv_reg_mr fail, errno=%d", errno); |
| return -EIO; |
| } |
| |
| mr->ibpd = pd->ibpd; |
| |
| return 0; |
| } |
| |
| void rdma_backend_destroy_mr(RdmaBackendMR *mr) |
| { |
| if (mr->ibmr) { |
| ibv_dereg_mr(mr->ibmr); |
| } |
| } |
| |
| int rdma_backend_create_cq(RdmaBackendDev *backend_dev, RdmaBackendCQ *cq, |
| int cqe) |
| { |
| int rc; |
| |
| cq->ibcq = ibv_create_cq(backend_dev->context, cqe + 1, NULL, |
| backend_dev->channel, 0); |
| if (!cq->ibcq) { |
| rdma_error_report("ibv_create_cq fail, errno=%d", errno); |
| return -EIO; |
| } |
| |
| rc = ibv_req_notify_cq(cq->ibcq, 0); |
| if (rc) { |
| rdma_warn_report("ibv_req_notify_cq fail, rc=%d, errno=%d", rc, errno); |
| } |
| |
| cq->backend_dev = backend_dev; |
| |
| return 0; |
| } |
| |
| void rdma_backend_destroy_cq(RdmaBackendCQ *cq) |
| { |
| if (cq->ibcq) { |
| ibv_destroy_cq(cq->ibcq); |
| } |
| } |
| |
| int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t qp_type, |
| RdmaBackendPD *pd, RdmaBackendCQ *scq, |
| RdmaBackendCQ *rcq, RdmaBackendSRQ *srq, |
| uint32_t max_send_wr, uint32_t max_recv_wr, |
| uint32_t max_send_sge, uint32_t max_recv_sge) |
| { |
| struct ibv_qp_init_attr attr = {}; |
| |
| qp->ibqp = 0; |
| |
| switch (qp_type) { |
| case IBV_QPT_GSI: |
| return 0; |
| |
| case IBV_QPT_RC: |
| /* fall through */ |
| case IBV_QPT_UD: |
| /* do nothing */ |
| break; |
| |
| default: |
| rdma_error_report("Unsupported QP type %d", qp_type); |
| return -EIO; |
| } |
| |
| attr.qp_type = qp_type; |
| attr.send_cq = scq->ibcq; |
| attr.recv_cq = rcq->ibcq; |
| attr.cap.max_send_wr = max_send_wr; |
| attr.cap.max_recv_wr = max_recv_wr; |
| attr.cap.max_send_sge = max_send_sge; |
| attr.cap.max_recv_sge = max_recv_sge; |
| if (srq) { |
| attr.srq = srq->ibsrq; |
| } |
| |
| qp->ibqp = ibv_create_qp(pd->ibpd, &attr); |
| if (!qp->ibqp) { |
| rdma_error_report("ibv_create_qp fail, errno=%d", errno); |
| return -EIO; |
| } |
| |
| rdma_protected_gslist_init(&qp->cqe_ctx_list); |
| |
| qp->ibpd = pd->ibpd; |
| |
| /* TODO: Query QP to get max_inline_data and save it to be used in send */ |
| |
| return 0; |
| } |
| |
| int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp, |
| uint8_t qp_type, uint32_t qkey) |
| { |
| struct ibv_qp_attr attr = {}; |
| int rc, attr_mask; |
| |
| attr_mask = IBV_QP_STATE | IBV_QP_PKEY_INDEX | IBV_QP_PORT; |
| attr.qp_state = IBV_QPS_INIT; |
| attr.pkey_index = 0; |
| attr.port_num = backend_dev->port_num; |
| |
| switch (qp_type) { |
| case IBV_QPT_RC: |
| attr_mask |= IBV_QP_ACCESS_FLAGS; |
| trace_rdma_backend_rc_qp_state_init(qp->ibqp->qp_num); |
| break; |
| |
| case IBV_QPT_UD: |
| attr.qkey = qkey; |
| attr_mask |= IBV_QP_QKEY; |
| trace_rdma_backend_ud_qp_state_init(qp->ibqp->qp_num, qkey); |
| break; |
| |
| default: |
| rdma_error_report("Unsupported QP type %d", qp_type); |
| return -EIO; |
| } |
| |
| rc = ibv_modify_qp(qp->ibqp, &attr, attr_mask); |
| if (rc) { |
| rdma_error_report("ibv_modify_qp fail, rc=%d, errno=%d", rc, errno); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp, |
| uint8_t qp_type, uint8_t sgid_idx, |
| union ibv_gid *dgid, uint32_t dqpn, |
| uint32_t rq_psn, uint32_t qkey, bool use_qkey) |
| { |
| struct ibv_qp_attr attr = {}; |
| union ibv_gid ibv_gid = { |
| .global.interface_id = dgid->global.interface_id, |
| .global.subnet_prefix = dgid->global.subnet_prefix |
| }; |
| int rc, attr_mask; |
| |
| attr.qp_state = IBV_QPS_RTR; |
| attr_mask = IBV_QP_STATE; |
| |
| qp->sgid_idx = sgid_idx; |
| |
| switch (qp_type) { |
| case IBV_QPT_RC: |
| attr.path_mtu = IBV_MTU_1024; |
| attr.dest_qp_num = dqpn; |
| attr.max_dest_rd_atomic = 1; |
| attr.min_rnr_timer = 12; |
| attr.ah_attr.port_num = backend_dev->port_num; |
| attr.ah_attr.is_global = 1; |
| attr.ah_attr.grh.hop_limit = 1; |
| attr.ah_attr.grh.dgid = ibv_gid; |
| attr.ah_attr.grh.sgid_index = qp->sgid_idx; |
| attr.rq_psn = rq_psn; |
| |
| attr_mask |= IBV_QP_AV | IBV_QP_PATH_MTU | IBV_QP_DEST_QPN | |
| IBV_QP_RQ_PSN | IBV_QP_MAX_DEST_RD_ATOMIC | |
| IBV_QP_MIN_RNR_TIMER; |
| |
| trace_rdma_backend_rc_qp_state_rtr(qp->ibqp->qp_num, |
| be64_to_cpu(ibv_gid.global. |
| subnet_prefix), |
| be64_to_cpu(ibv_gid.global. |
| interface_id), |
| qp->sgid_idx, dqpn, rq_psn); |
| break; |
| |
| case IBV_QPT_UD: |
| if (use_qkey) { |
| attr.qkey = qkey; |
| attr_mask |= IBV_QP_QKEY; |
| } |
| trace_rdma_backend_ud_qp_state_rtr(qp->ibqp->qp_num, use_qkey ? qkey : |
| 0); |
| break; |
| } |
| |
| rc = ibv_modify_qp(qp->ibqp, &attr, attr_mask); |
| if (rc) { |
| rdma_error_report("ibv_modify_qp fail, rc=%d, errno=%d", rc, errno); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t qp_type, |
| uint32_t sq_psn, uint32_t qkey, bool use_qkey) |
| { |
| struct ibv_qp_attr attr = {}; |
| int rc, attr_mask; |
| |
| attr.qp_state = IBV_QPS_RTS; |
| attr.sq_psn = sq_psn; |
| attr_mask = IBV_QP_STATE | IBV_QP_SQ_PSN; |
| |
| switch (qp_type) { |
| case IBV_QPT_RC: |
| attr.timeout = 14; |
| attr.retry_cnt = 7; |
| attr.rnr_retry = 7; |
| attr.max_rd_atomic = 1; |
| |
| attr_mask |= IBV_QP_TIMEOUT | IBV_QP_RETRY_CNT | IBV_QP_RNR_RETRY | |
| IBV_QP_MAX_QP_RD_ATOMIC; |
| trace_rdma_backend_rc_qp_state_rts(qp->ibqp->qp_num, sq_psn); |
| break; |
| |
| case IBV_QPT_UD: |
| if (use_qkey) { |
| attr.qkey = qkey; |
| attr_mask |= IBV_QP_QKEY; |
| } |
| trace_rdma_backend_ud_qp_state_rts(qp->ibqp->qp_num, sq_psn, |
| use_qkey ? qkey : 0); |
| break; |
| } |
| |
| rc = ibv_modify_qp(qp->ibqp, &attr, attr_mask); |
| if (rc) { |
| rdma_error_report("ibv_modify_qp fail, rc=%d, errno=%d", rc, errno); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| int rdma_backend_query_qp(RdmaBackendQP *qp, struct ibv_qp_attr *attr, |
| int attr_mask, struct ibv_qp_init_attr *init_attr) |
| { |
| if (!qp->ibqp) { |
| attr->qp_state = IBV_QPS_RTS; |
| return 0; |
| } |
| |
| return ibv_query_qp(qp->ibqp, attr, attr_mask, init_attr); |
| } |
| |
| void rdma_backend_destroy_qp(RdmaBackendQP *qp, RdmaDeviceResources *dev_res) |
| { |
| if (qp->ibqp) { |
| ibv_destroy_qp(qp->ibqp); |
| } |
| g_slist_foreach(qp->cqe_ctx_list.list, free_cqe_ctx, dev_res); |
| rdma_protected_gslist_destroy(&qp->cqe_ctx_list); |
| } |
| |
| int rdma_backend_create_srq(RdmaBackendSRQ *srq, RdmaBackendPD *pd, |
| uint32_t max_wr, uint32_t max_sge, |
| uint32_t srq_limit) |
| { |
| struct ibv_srq_init_attr srq_init_attr = {}; |
| |
| srq_init_attr.attr.max_wr = max_wr; |
| srq_init_attr.attr.max_sge = max_sge; |
| srq_init_attr.attr.srq_limit = srq_limit; |
| |
| srq->ibsrq = ibv_create_srq(pd->ibpd, &srq_init_attr); |
| if (!srq->ibsrq) { |
| rdma_error_report("ibv_create_srq failed, errno=%d", errno); |
| return -EIO; |
| } |
| |
| rdma_protected_gslist_init(&srq->cqe_ctx_list); |
| |
| return 0; |
| } |
| |
| int rdma_backend_query_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr) |
| { |
| if (!srq->ibsrq) { |
| return -EINVAL; |
| } |
| |
| return ibv_query_srq(srq->ibsrq, srq_attr); |
| } |
| |
| int rdma_backend_modify_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr, |
| int srq_attr_mask) |
| { |
| if (!srq->ibsrq) { |
| return -EINVAL; |
| } |
| |
| return ibv_modify_srq(srq->ibsrq, srq_attr, srq_attr_mask); |
| } |
| |
| void rdma_backend_destroy_srq(RdmaBackendSRQ *srq, RdmaDeviceResources *dev_res) |
| { |
| if (srq->ibsrq) { |
| ibv_destroy_srq(srq->ibsrq); |
| } |
| g_slist_foreach(srq->cqe_ctx_list.list, free_cqe_ctx, dev_res); |
| rdma_protected_gslist_destroy(&srq->cqe_ctx_list); |
| } |
| |
| #define CHK_ATTR(req, dev, member, fmt) ({ \ |
| trace_rdma_check_dev_attr(#member, dev.member, req->member); \ |
| if (req->member > dev.member) { \ |
| rdma_warn_report("%s = "fmt" is higher than host device capability "fmt, \ |
| #member, req->member, dev.member); \ |
| req->member = dev.member; \ |
| } \ |
| }) |
| |
| static int init_device_caps(RdmaBackendDev *backend_dev, |
| struct ibv_device_attr *dev_attr) |
| { |
| struct ibv_device_attr bk_dev_attr; |
| int rc; |
| |
| rc = ibv_query_device(backend_dev->context, &bk_dev_attr); |
| if (rc) { |
| rdma_error_report("ibv_query_device fail, rc=%d, errno=%d", rc, errno); |
| return -EIO; |
| } |
| |
| dev_attr->max_sge = MAX_SGE; |
| dev_attr->max_srq_sge = MAX_SGE; |
| |
| CHK_ATTR(dev_attr, bk_dev_attr, max_mr_size, "%" PRId64); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_qp, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_sge, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_cq, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_mr, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_pd, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_qp_rd_atom, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_qp_init_rd_atom, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_ah, "%d"); |
| CHK_ATTR(dev_attr, bk_dev_attr, max_srq, "%d"); |
| |
| return 0; |
| } |
| |
| static inline void build_mad_hdr(struct ibv_grh *grh, union ibv_gid *sgid, |
| union ibv_gid *my_gid, int paylen) |
| { |
| grh->paylen = htons(paylen); |
| grh->sgid = *sgid; |
| grh->dgid = *my_gid; |
| } |
| |
| static void process_incoming_mad_req(RdmaBackendDev *backend_dev, |
| RdmaCmMuxMsg *msg) |
| { |
| unsigned long cqe_ctx_id; |
| BackendCtx *bctx; |
| char *mad; |
| |
| trace_mad_message("recv", msg->umad.mad, msg->umad_len); |
| |
| cqe_ctx_id = rdma_protected_qlist_pop_int64(&backend_dev->recv_mads_list); |
| if (cqe_ctx_id == -ENOENT) { |
| rdma_warn_report("No more free MADs buffers, waiting for a while"); |
| sleep(THR_POLL_TO); |
| return; |
| } |
| |
| bctx = rdma_rm_get_cqe_ctx(backend_dev->rdma_dev_res, cqe_ctx_id); |
| if (unlikely(!bctx)) { |
| rdma_error_report("No matching ctx for req %ld", cqe_ctx_id); |
| backend_dev->rdma_dev_res->stats.mad_rx_err++; |
| return; |
| } |
| |
| mad = rdma_pci_dma_map(backend_dev->dev, bctx->sge.addr, |
| bctx->sge.length); |
| if (!mad || bctx->sge.length < msg->umad_len + MAD_HDR_SIZE) { |
| backend_dev->rdma_dev_res->stats.mad_rx_err++; |
| complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_INV_MAD_BUFF, |
| bctx->up_ctx); |
| } else { |
| struct ibv_wc wc = {}; |
| memset(mad, 0, bctx->sge.length); |
| build_mad_hdr((struct ibv_grh *)mad, |
| (union ibv_gid *)&msg->umad.hdr.addr.gid, &msg->hdr.sgid, |
| msg->umad_len); |
| memcpy(&mad[MAD_HDR_SIZE], msg->umad.mad, msg->umad_len); |
| rdma_pci_dma_unmap(backend_dev->dev, mad, bctx->sge.length); |
| |
| wc.byte_len = msg->umad_len; |
| wc.status = IBV_WC_SUCCESS; |
| wc.wc_flags = IBV_WC_GRH; |
| backend_dev->rdma_dev_res->stats.mad_rx++; |
| comp_handler(bctx->up_ctx, &wc); |
| } |
| |
| g_free(bctx); |
| rdma_rm_dealloc_cqe_ctx(backend_dev->rdma_dev_res, cqe_ctx_id); |
| } |
| |
| static inline int rdmacm_mux_can_receive(void *opaque) |
| { |
| RdmaBackendDev *backend_dev = (RdmaBackendDev *)opaque; |
| |
| return rdmacm_mux_can_process_async(backend_dev); |
| } |
| |
| static void rdmacm_mux_read(void *opaque, const uint8_t *buf, int size) |
| { |
| RdmaBackendDev *backend_dev = (RdmaBackendDev *)opaque; |
| RdmaCmMuxMsg *msg = (RdmaCmMuxMsg *)buf; |
| |
| trace_rdmacm_mux("read", msg->hdr.msg_type, msg->hdr.op_code); |
| |
| if (msg->hdr.msg_type != RDMACM_MUX_MSG_TYPE_REQ && |
| msg->hdr.op_code != RDMACM_MUX_OP_CODE_MAD) { |
| rdma_error_report("Error: Not a MAD request, skipping"); |
| return; |
| } |
| process_incoming_mad_req(backend_dev, msg); |
| } |
| |
| static int mad_init(RdmaBackendDev *backend_dev, CharBackend *mad_chr_be) |
| { |
| int ret; |
| |
| backend_dev->rdmacm_mux.chr_be = mad_chr_be; |
| |
| ret = qemu_chr_fe_backend_connected(backend_dev->rdmacm_mux.chr_be); |
| if (!ret) { |
| rdma_error_report("Missing chardev for MAD multiplexer"); |
| return -EIO; |
| } |
| |
| rdma_protected_qlist_init(&backend_dev->recv_mads_list); |
| |
| enable_rdmacm_mux_async(backend_dev); |
| |
| qemu_chr_fe_set_handlers(backend_dev->rdmacm_mux.chr_be, |
| rdmacm_mux_can_receive, rdmacm_mux_read, NULL, |
| NULL, backend_dev, NULL, true); |
| |
| return 0; |
| } |
| |
| static void mad_stop(RdmaBackendDev *backend_dev) |
| { |
| clean_recv_mads(backend_dev); |
| } |
| |
| static void mad_fini(RdmaBackendDev *backend_dev) |
| { |
| disable_rdmacm_mux_async(backend_dev); |
| qemu_chr_fe_disconnect(backend_dev->rdmacm_mux.chr_be); |
| rdma_protected_qlist_destroy(&backend_dev->recv_mads_list); |
| } |
| |
| int rdma_backend_get_gid_index(RdmaBackendDev *backend_dev, |
| union ibv_gid *gid) |
| { |
| union ibv_gid sgid; |
| int ret; |
| int i = 0; |
| |
| do { |
| ret = ibv_query_gid(backend_dev->context, backend_dev->port_num, i, |
| &sgid); |
| i++; |
| } while (!ret && (memcmp(&sgid, gid, sizeof(*gid)))); |
| |
| trace_rdma_backend_get_gid_index(be64_to_cpu(gid->global.subnet_prefix), |
| be64_to_cpu(gid->global.interface_id), |
| i - 1); |
| |
| return ret ? ret : i - 1; |
| } |
| |
| int rdma_backend_add_gid(RdmaBackendDev *backend_dev, const char *ifname, |
| union ibv_gid *gid) |
| { |
| RdmaCmMuxMsg msg = {}; |
| int ret; |
| |
| trace_rdma_backend_gid_change("add", be64_to_cpu(gid->global.subnet_prefix), |
| be64_to_cpu(gid->global.interface_id)); |
| |
| msg.hdr.op_code = RDMACM_MUX_OP_CODE_REG; |
| memcpy(msg.hdr.sgid.raw, gid->raw, sizeof(msg.hdr.sgid)); |
| |
| ret = rdmacm_mux_send(backend_dev, &msg); |
| if (ret) { |
| rdma_error_report("Failed to register GID to rdma_umadmux (%d)", ret); |
| return -EIO; |
| } |
| |
| qapi_event_send_rdma_gid_status_changed(ifname, true, |
| gid->global.subnet_prefix, |
| gid->global.interface_id); |
| |
| return ret; |
| } |
| |
| int rdma_backend_del_gid(RdmaBackendDev *backend_dev, const char *ifname, |
| union ibv_gid *gid) |
| { |
| RdmaCmMuxMsg msg = {}; |
| int ret; |
| |
| trace_rdma_backend_gid_change("del", be64_to_cpu(gid->global.subnet_prefix), |
| be64_to_cpu(gid->global.interface_id)); |
| |
| msg.hdr.op_code = RDMACM_MUX_OP_CODE_UNREG; |
| memcpy(msg.hdr.sgid.raw, gid->raw, sizeof(msg.hdr.sgid)); |
| |
| ret = rdmacm_mux_send(backend_dev, &msg); |
| if (ret) { |
| rdma_error_report("Failed to unregister GID from rdma_umadmux (%d)", |
| ret); |
| return -EIO; |
| } |
| |
| qapi_event_send_rdma_gid_status_changed(ifname, false, |
| gid->global.subnet_prefix, |
| gid->global.interface_id); |
| |
| return 0; |
| } |
| |
| int rdma_backend_init(RdmaBackendDev *backend_dev, PCIDevice *pdev, |
| RdmaDeviceResources *rdma_dev_res, |
| const char *backend_device_name, uint8_t port_num, |
| struct ibv_device_attr *dev_attr, CharBackend *mad_chr_be) |
| { |
| int i; |
| int ret = 0; |
| int num_ibv_devices; |
| struct ibv_device **dev_list; |
| |
| memset(backend_dev, 0, sizeof(*backend_dev)); |
| |
| backend_dev->dev = pdev; |
| backend_dev->port_num = port_num; |
| backend_dev->rdma_dev_res = rdma_dev_res; |
| |
| rdma_backend_register_comp_handler(dummy_comp_handler); |
| |
| dev_list = ibv_get_device_list(&num_ibv_devices); |
| if (!dev_list) { |
| rdma_error_report("Failed to get IB devices list"); |
| return -EIO; |
| } |
| |
| if (num_ibv_devices == 0) { |
| rdma_error_report("No IB devices were found"); |
| ret = -ENXIO; |
| goto out_free_dev_list; |
| } |
| |
| if (backend_device_name) { |
| for (i = 0; dev_list[i]; ++i) { |
| if (!strcmp(ibv_get_device_name(dev_list[i]), |
| backend_device_name)) { |
| break; |
| } |
| } |
| |
| backend_dev->ib_dev = dev_list[i]; |
| if (!backend_dev->ib_dev) { |
| rdma_error_report("Failed to find IB device %s", |
| backend_device_name); |
| ret = -EIO; |
| goto out_free_dev_list; |
| } |
| } else { |
| backend_dev->ib_dev = *dev_list; |
| } |
| |
| rdma_info_report("uverb device %s", backend_dev->ib_dev->dev_name); |
| |
| backend_dev->context = ibv_open_device(backend_dev->ib_dev); |
| if (!backend_dev->context) { |
| rdma_error_report("Failed to open IB device %s", |
| ibv_get_device_name(backend_dev->ib_dev)); |
| ret = -EIO; |
| goto out; |
| } |
| |
| backend_dev->channel = ibv_create_comp_channel(backend_dev->context); |
| if (!backend_dev->channel) { |
| rdma_error_report("Failed to create IB communication channel"); |
| ret = -EIO; |
| goto out_close_device; |
| } |
| |
| ret = init_device_caps(backend_dev, dev_attr); |
| if (ret) { |
| rdma_error_report("Failed to initialize device capabilities"); |
| ret = -EIO; |
| goto out_destroy_comm_channel; |
| } |
| |
| |
| ret = mad_init(backend_dev, mad_chr_be); |
| if (ret) { |
| rdma_error_report("Failed to initialize mad"); |
| ret = -EIO; |
| goto out_destroy_comm_channel; |
| } |
| |
| backend_dev->comp_thread.run = false; |
| backend_dev->comp_thread.is_running = false; |
| |
| ah_cache_init(); |
| |
| goto out_free_dev_list; |
| |
| out_destroy_comm_channel: |
| ibv_destroy_comp_channel(backend_dev->channel); |
| |
| out_close_device: |
| ibv_close_device(backend_dev->context); |
| |
| out_free_dev_list: |
| ibv_free_device_list(dev_list); |
| |
| out: |
| return ret; |
| } |
| |
| |
| void rdma_backend_start(RdmaBackendDev *backend_dev) |
| { |
| start_comp_thread(backend_dev); |
| } |
| |
| void rdma_backend_stop(RdmaBackendDev *backend_dev) |
| { |
| mad_stop(backend_dev); |
| stop_backend_thread(&backend_dev->comp_thread); |
| } |
| |
| void rdma_backend_fini(RdmaBackendDev *backend_dev) |
| { |
| mad_fini(backend_dev); |
| g_hash_table_destroy(ah_hash); |
| ibv_destroy_comp_channel(backend_dev->channel); |
| ibv_close_device(backend_dev->context); |
| } |
