diff options
Diffstat (limited to 'hw/rdma/rdma_backend.c')
| -rw-r--r-- | hw/rdma/rdma_backend.c | 524 |
1 files changed, 460 insertions, 64 deletions
diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c index d7a4bbd91f..c28bfbd44d 100644 --- a/hw/rdma/rdma_backend.c +++ b/hw/rdma/rdma_backend.c @@ -15,10 +15,18 @@ #include "qemu/osdep.h" #include "qemu/error-report.h" +#include "sysemu/sysemu.h" #include "qapi/error.h" +#include "qapi/qmp/qlist.h" +#include "qapi/qmp/qnum.h" +#include "qapi/qapi-events-rdma.h" #include <infiniband/verbs.h> +#include <infiniband/umad_types.h> +#include <infiniband/umad.h> +#include <rdma/rdma_user_cm.h> +#include "contrib/rdmacm-mux/rdmacm-mux.h" #include "trace.h" #include "rdma_utils.h" #include "rdma_rm.h" @@ -29,27 +37,46 @@ #define VENDOR_ERR_TOO_MANY_SGES 0x202 #define VENDOR_ERR_NOMEM 0x203 #define VENDOR_ERR_QP0 0x204 -#define VENDOR_ERR_NO_SGE 0x205 +#define VENDOR_ERR_INV_NUM_SGE 0x205 #define VENDOR_ERR_MAD_SEND 0x206 #define VENDOR_ERR_INVLKEY 0x207 #define VENDOR_ERR_MR_SMALL 0x208 +#define VENDOR_ERR_INV_MAD_BUFF 0x209 #define THR_NAME_LEN 16 #define THR_POLL_TO 5000 +#define MAD_HDR_SIZE sizeof(struct ibv_grh) + typedef struct BackendCtx { - uint64_t req_id; void *up_ctx; bool is_tx_req; + struct ibv_sge sge; /* Used to save MAD recv buffer */ } BackendCtx; -static void (*comp_handler)(int status, unsigned int vendor_err, void *ctx); +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(int status, unsigned int vendor_err, void *ctx) +static void dummy_comp_handler(void *ctx, struct ibv_wc *wc) { pr_err("No completion handler is registered\n"); } +static inline void complete_work(enum ibv_wc_status status, uint32_t vendor_err, + void *ctx) +{ + struct ibv_wc wc = {0}; + + wc.status = status; + wc.vendor_err = vendor_err; + + comp_handler(ctx, &wc); +} + static void poll_cq(RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq) { int i, ne; @@ -74,7 +101,7 @@ static void poll_cq(RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq) } pr_dbg("Processing %s CQE\n", bctx->is_tx_req ? "send" : "recv"); - comp_handler(wc[i].status, wc[i].vendor_err, bctx->up_ctx); + comp_handler(bctx->up_ctx, &wc[i]); rdma_rm_dealloc_cqe_ctx(rdma_dev_res, wc[i].wr_id); g_free(bctx); @@ -146,6 +173,77 @@ static void *comp_handler_thread(void *arg) 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 check_mux_op_status(CharBackend *mad_chr_be) +{ + RdmaCmMuxMsg msg = {0}; + int ret; + + pr_dbg("Reading response\n"); + ret = qemu_chr_fe_read_all(mad_chr_be, (uint8_t *)&msg, sizeof(msg)); + if (ret != sizeof(msg)) { + pr_dbg("Invalid message size %d, expecting %ld\n", ret, sizeof(msg)); + return -EIO; + } + + pr_dbg("msg_type=%d\n", msg.hdr.msg_type); + pr_dbg("op_code=%d\n", msg.hdr.op_code); + pr_dbg("err_code=%d\n", msg.hdr.err_code); + + if (msg.hdr.msg_type != RDMACM_MUX_MSG_TYPE_RESP) { + pr_dbg("Invalid message type %d\n", msg.hdr.msg_type); + return -EIO; + } + + if (msg.hdr.err_code != RDMACM_MUX_ERR_CODE_OK) { + pr_dbg("Operation failed in mux, error code %d\n", msg.hdr.err_code); + return -EIO; + } + + return 0; +} + +static int exec_rdmacm_mux_req(RdmaBackendDev *backend_dev, RdmaCmMuxMsg *msg) +{ + int rc = 0; + + pr_dbg("Executing request %d\n", msg->hdr.op_code); + + msg->hdr.msg_type = RDMACM_MUX_MSG_TYPE_REQ; + 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); + pr_dbg("Fail to send request to rdmacm_mux (rc=%d)\n", rc); + return -EIO; + } + + rc = check_mux_op_status(backend_dev->rdmacm_mux.chr_be); + if (rc) { + pr_dbg("Fail to execute rdmacm_mux request %d (rc=%d)\n", + msg->hdr.op_code, rc); + } + + enable_rdmacm_mux_async(backend_dev); + + return 0; +} + static void stop_backend_thread(RdmaBackendThread *thread) { thread->run = false; @@ -168,8 +266,8 @@ static void start_comp_thread(RdmaBackendDev *backend_dev) comp_handler_thread, backend_dev, QEMU_THREAD_DETACHED); } -void rdma_backend_register_comp_handler(void (*handler)(int status, - unsigned int vendor_err, void *ctx)) +void rdma_backend_register_comp_handler(void (*handler)(void *ctx, + struct ibv_wc *wc)) { comp_handler = handler; } @@ -286,11 +384,73 @@ static int build_host_sge_array(RdmaDeviceResources *rdma_dev_res, return 0; } +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 = {0}; + char *hdr, *data; + int ret; + + pr_dbg("num_sge=%d\n", num_sge); + + 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; + pr_dbg("umad_len=%d\n", msg.umad_len); + + if (msg.umad_len > sizeof(msg.umad.mad)) { + return -ENOMEM; + } + + msg.umad.hdr.addr.qpn = htobe32(1); + msg.umad.hdr.addr.grh_present = 1; + pr_dbg("sgid_idx=%d\n", sgid_idx); + pr_dbg("sgid=0x%llx\n", sgid->global.interface_id); + 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) { + pr_dbg("Fail to map to sge[0]\n"); + return -ENOMEM; + } + data = rdma_pci_dma_map(backend_dev->dev, sge[1].addr, sge[1].length); + if (!data) { + pr_dbg("Fail to map to sge[1]\n"); + rdma_pci_dma_unmap(backend_dev->dev, hdr, sge[0].length); + return -ENOMEM; + } + + pr_dbg_buf("mad_hdr", hdr, sge[0].length); + pr_dbg_buf("mad_data", data, sge[1].length); + + 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); + + ret = exec_rdmacm_mux_req(backend_dev, &msg); + if (ret) { + pr_dbg("Fail to send MAD to rdma_umadmux (%d)\n", 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, - union ibv_gid *dgid, uint32_t dqpn, - uint32_t dqkey, void *ctx) + 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]; @@ -301,19 +461,23 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev, if (!qp->ibqp) { /* This field does not get initialized for QP0 and QP1 */ if (qp_type == IBV_QPT_SMI) { pr_dbg("QP0 unsupported\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx); } else if (qp_type == IBV_QPT_GSI) { pr_dbg("QP1\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_MAD_SEND, ctx); + rc = mad_send(backend_dev, sgid_idx, sgid, sge, num_sge); + if (rc) { + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_MAD_SEND, ctx); + } else { + complete_work(IBV_WC_SUCCESS, 0, ctx); + } } - pr_dbg("qp->ibqp is NULL for qp_type %d!!!\n", qp_type); return; } pr_dbg("num_sge=%d\n", num_sge); - if (!num_sge) { - pr_dbg("num_sge=0\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_NO_SGE, ctx); + if (!num_sge || num_sge > MAX_SGE) { + pr_dbg("invalid num_sge=%d\n", num_sge); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_INV_NUM_SGE, ctx); return; } @@ -324,20 +488,23 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev, rc = rdma_rm_alloc_cqe_ctx(backend_dev->rdma_dev_res, &bctx_id, bctx); if (unlikely(rc)) { pr_dbg("Failed to allocate cqe_ctx\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx); goto out_free_bctx; } rc = build_host_sge_array(backend_dev->rdma_dev_res, new_sge, sge, num_sge); if (rc) { pr_dbg("Error: Failed to build host SGE array\n"); - comp_handler(IBV_WC_GENERAL_ERR, rc, ctx); + complete_work(IBV_WC_GENERAL_ERR, rc, ctx); goto out_dealloc_cqe_ctx; } if (qp_type == IBV_QPT_UD) { - wr.wr.ud.ah = create_ah(backend_dev, qp->ibpd, - backend_dev->backend_gid_idx, dgid); + 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 out_dealloc_cqe_ctx; + } wr.wr.ud.remote_qpn = dqpn; wr.wr.ud.remote_qkey = dqkey; } @@ -353,7 +520,7 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev, if (rc) { pr_dbg("Fail (%d, %d) to post send WQE to qpn %d\n", rc, errno, qp->ibqp->qp_num); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); goto out_dealloc_cqe_ctx; } @@ -366,6 +533,48 @@ out_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) { + pr_dbg("Invalid num_sge (%d), expecting 1\n", num_sge); + return VENDOR_ERR_INV_NUM_SGE; + } + + if (sge[0].length < RDMA_MAX_PRIVATE_DATA + sizeof(struct ibv_grh)) { + pr_dbg("Too small buffer for MAD\n"); + return VENDOR_ERR_INV_MAD_BUFF; + } + + pr_dbg("addr=0x%" PRIx64"\n", sge[0].addr); + pr_dbg("length=%d\n", sge[0].length); + pr_dbg("lkey=%d\n", sge[0].lkey); + + 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); + pr_dbg("Fail to allocate cqe_ctx\n"); + return VENDOR_ERR_NOMEM; + } + + pr_dbg("bctx_id %d, bctx %p, ctx %p\n", bctx_id, bctx, ctx); + bctx->up_ctx = ctx; + bctx->sge = *sge; + + qemu_mutex_lock(&backend_dev->recv_mads_list.lock); + qlist_append_int(backend_dev->recv_mads_list.list, bctx_id); + qemu_mutex_unlock(&backend_dev->recv_mads_list.lock); + + return 0; +} + void rdma_backend_post_recv(RdmaBackendDev *backend_dev, RdmaDeviceResources *rdma_dev_res, RdmaBackendQP *qp, uint8_t qp_type, @@ -380,19 +589,22 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev, if (!qp->ibqp) { /* This field does not get initialized for QP0 and QP1 */ if (qp_type == IBV_QPT_SMI) { pr_dbg("QP0 unsupported\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx); } if (qp_type == IBV_QPT_GSI) { pr_dbg("QP1\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_MAD_SEND, ctx); + rc = save_mad_recv_buffer(backend_dev, sge, num_sge, ctx); + if (rc) { + complete_work(IBV_WC_GENERAL_ERR, rc, ctx); + } } return; } pr_dbg("num_sge=%d\n", num_sge); - if (!num_sge) { - pr_dbg("num_sge=0\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_NO_SGE, ctx); + if (!num_sge || num_sge > MAX_SGE) { + pr_dbg("invalid num_sge=%d\n", num_sge); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_INV_NUM_SGE, ctx); return; } @@ -403,14 +615,14 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev, rc = rdma_rm_alloc_cqe_ctx(rdma_dev_res, &bctx_id, bctx); if (unlikely(rc)) { pr_dbg("Failed to allocate cqe_ctx\n"); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx); goto out_free_bctx; } rc = build_host_sge_array(rdma_dev_res, new_sge, sge, num_sge); if (rc) { pr_dbg("Error: Failed to build host SGE array\n"); - comp_handler(IBV_WC_GENERAL_ERR, rc, ctx); + complete_work(IBV_WC_GENERAL_ERR, rc, ctx); goto out_dealloc_cqe_ctx; } @@ -422,7 +634,7 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev, if (rc) { pr_dbg("Fail (%d, %d) to post recv WQE to qpn %d\n", rc, errno, qp->ibqp->qp_num); - comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); goto out_dealloc_cqe_ctx; } @@ -513,7 +725,6 @@ int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t qp_type, switch (qp_type) { case IBV_QPT_GSI: - pr_dbg("QP1 unsupported\n"); return 0; case IBV_QPT_RC: @@ -594,9 +805,9 @@ int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp, } int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp, - uint8_t qp_type, union ibv_gid *dgid, - uint32_t dqpn, uint32_t rq_psn, uint32_t qkey, - bool use_qkey) + 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 = {0}; union ibv_gid ibv_gid = { @@ -608,13 +819,15 @@ int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp, attr.qp_state = IBV_QPS_RTR; attr_mask = IBV_QP_STATE; + qp->sgid_idx = sgid_idx; + switch (qp_type) { case IBV_QPT_RC: pr_dbg("dgid=0x%" PRIx64 ",%" PRIx64 "\n", be64_to_cpu(ibv_gid.global.subnet_prefix), be64_to_cpu(ibv_gid.global.interface_id)); pr_dbg("dqpn=0x%x\n", dqpn); - pr_dbg("sgid_idx=%d\n", backend_dev->backend_gid_idx); + pr_dbg("sgid_idx=%d\n", qp->sgid_idx); pr_dbg("sport_num=%d\n", backend_dev->port_num); pr_dbg("rq_psn=0x%x\n", rq_psn); @@ -626,7 +839,7 @@ int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp, 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 = backend_dev->backend_gid_idx; + 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 | @@ -635,8 +848,8 @@ int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp, break; case IBV_QPT_UD: + pr_dbg("qkey=0x%x\n", qkey); if (use_qkey) { - pr_dbg("qkey=0x%x\n", qkey); attr.qkey = qkey; attr_mask |= IBV_QP_QKEY; } @@ -744,23 +957,224 @@ static int init_device_caps(RdmaBackendDev *backend_dev, 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; + + pr_dbg("paylen=%d (net=0x%x)\n", paylen, grh->paylen); + pr_dbg("dgid=0x%llx\n", my_gid->global.interface_id); + pr_dbg("sgid=0x%llx\n", sgid->global.interface_id); +} + +static void process_incoming_mad_req(RdmaBackendDev *backend_dev, + RdmaCmMuxMsg *msg) +{ + QObject *o_ctx_id; + unsigned long cqe_ctx_id; + BackendCtx *bctx; + char *mad; + + pr_dbg("umad_len=%d\n", msg->umad_len); + +#ifdef PVRDMA_DEBUG + struct umad_hdr *hdr = (struct umad_hdr *)&msg->umad.mad; + pr_dbg("bv %x cls %x cv %x mtd %x st %d tid %" PRIx64 " at %x atm %x\n", + hdr->base_version, hdr->mgmt_class, hdr->class_version, + hdr->method, hdr->status, be64toh(hdr->tid), + hdr->attr_id, hdr->attr_mod); +#endif + + qemu_mutex_lock(&backend_dev->recv_mads_list.lock); + o_ctx_id = qlist_pop(backend_dev->recv_mads_list.list); + qemu_mutex_unlock(&backend_dev->recv_mads_list.lock); + if (!o_ctx_id) { + pr_dbg("No more free MADs buffers, waiting for a while\n"); + sleep(THR_POLL_TO); + return; + } + + cqe_ctx_id = qnum_get_uint(qobject_to(QNum, o_ctx_id)); + bctx = rdma_rm_get_cqe_ctx(backend_dev->rdma_dev_res, cqe_ctx_id); + if (unlikely(!bctx)) { + pr_dbg("Error: Fail to find ctx for %ld\n", cqe_ctx_id); + return; + } + + pr_dbg("id %ld, bctx %p, ctx %p\n", cqe_ctx_id, bctx, bctx->up_ctx); + + 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) { + complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_INV_MAD_BUFF, + bctx->up_ctx); + } else { + struct ibv_wc wc = {0}; + pr_dbg_buf("mad", msg->umad.mad, msg->umad_len); + 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; + 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; + + pr_dbg("Got %d bytes\n", size); + pr_dbg("msg_type=%d\n", msg->hdr.msg_type); + pr_dbg("op_code=%d\n", msg->hdr.op_code); + + if (msg->hdr.msg_type != RDMACM_MUX_MSG_TYPE_REQ && + msg->hdr.op_code != RDMACM_MUX_OP_CODE_MAD) { + pr_dbg("Error: Not a MAD request, skipping\n"); + 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) { + pr_dbg("Missing chardev for MAD multiplexer\n"); + return -EIO; + } + + qemu_mutex_init(&backend_dev->recv_mads_list.lock); + backend_dev->recv_mads_list.list = qlist_new(); + + 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_fini(RdmaBackendDev *backend_dev) +{ + pr_dbg("Stopping MAD\n"); + disable_rdmacm_mux_async(backend_dev); + qemu_chr_fe_disconnect(backend_dev->rdmacm_mux.chr_be); + qlist_destroy_obj(QOBJECT(backend_dev->recv_mads_list.list)); + qemu_mutex_destroy(&backend_dev->recv_mads_list.lock); +} + +int rdma_backend_get_gid_index(RdmaBackendDev *backend_dev, + union ibv_gid *gid) +{ + union ibv_gid sgid; + int ret; + int i = 0; + + pr_dbg("0x%llx, 0x%llx\n", + (long long unsigned int)be64_to_cpu(gid->global.subnet_prefix), + (long long unsigned int)be64_to_cpu(gid->global.interface_id)); + + do { + ret = ibv_query_gid(backend_dev->context, backend_dev->port_num, i, + &sgid); + i++; + } while (!ret && (memcmp(&sgid, gid, sizeof(*gid)))); + + pr_dbg("gid_index=%d\n", i - 1); + + return ret ? ret : i - 1; +} + +int rdma_backend_add_gid(RdmaBackendDev *backend_dev, const char *ifname, + union ibv_gid *gid) +{ + RdmaCmMuxMsg msg = {0}; + int ret; + + pr_dbg("0x%llx, 0x%llx\n", + (long long unsigned int)be64_to_cpu(gid->global.subnet_prefix), + (long long unsigned int)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 = exec_rdmacm_mux_req(backend_dev, &msg); + if (ret) { + pr_dbg("Fail to register GID to rdma_umadmux (%d)\n", 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 = {0}; + int ret; + + pr_dbg("0x%llx, 0x%llx\n", + (long long unsigned int)be64_to_cpu(gid->global.subnet_prefix), + (long long unsigned int)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 = exec_rdmacm_mux_req(backend_dev, &msg); + if (ret) { + pr_dbg("Fail to unregister GID from rdma_umadmux (%d)\n", 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, - uint8_t backend_gid_idx, struct ibv_device_attr *dev_attr, + struct ibv_device_attr *dev_attr, CharBackend *mad_chr_be, Error **errp) { int i; int ret = 0; int num_ibv_devices; struct ibv_device **dev_list; - struct ibv_port_attr port_attr; memset(backend_dev, 0, sizeof(*backend_dev)); backend_dev->dev = pdev; - - backend_dev->backend_gid_idx = backend_gid_idx; backend_dev->port_num = port_num; backend_dev->rdma_dev_res = rdma_dev_res; @@ -797,9 +1211,9 @@ int rdma_backend_init(RdmaBackendDev *backend_dev, PCIDevice *pdev, backend_dev->ib_dev = *dev_list; } - pr_dbg("Using backend device %s, port %d, gid_idx %d\n", - ibv_get_device_name(backend_dev->ib_dev), - backend_dev->port_num, backend_dev->backend_gid_idx); + pr_dbg("Using backend device %s, port %d\n", + ibv_get_device_name(backend_dev->ib_dev), backend_dev->port_num); + pr_dbg("uverb device %s\n", backend_dev->ib_dev->dev_name); backend_dev->context = ibv_open_device(backend_dev->ib_dev); if (!backend_dev->context) { @@ -816,20 +1230,6 @@ int rdma_backend_init(RdmaBackendDev *backend_dev, PCIDevice *pdev, } pr_dbg("dev->backend_dev.channel=%p\n", backend_dev->channel); - ret = ibv_query_port(backend_dev->context, backend_dev->port_num, - &port_attr); - if (ret) { - error_setg(errp, "Error %d from ibv_query_port", ret); - ret = -EIO; - goto out_destroy_comm_channel; - } - - if (backend_dev->backend_gid_idx >= port_attr.gid_tbl_len) { - error_setg(errp, "Invalid backend_gid_idx, should be less than %d", - port_attr.gid_tbl_len); - goto out_destroy_comm_channel; - } - ret = init_device_caps(backend_dev, dev_attr); if (ret) { error_setg(errp, "Failed to initialize device capabilities"); @@ -837,18 +1237,13 @@ int rdma_backend_init(RdmaBackendDev *backend_dev, PCIDevice *pdev, goto out_destroy_comm_channel; } - ret = ibv_query_gid(backend_dev->context, backend_dev->port_num, - backend_dev->backend_gid_idx, &backend_dev->gid); + + ret = mad_init(backend_dev, mad_chr_be); if (ret) { - error_setg(errp, "Failed to query gid %d", - backend_dev->backend_gid_idx); + error_setg(errp, "Fail to initialize mad"); ret = -EIO; goto out_destroy_comm_channel; } - pr_dbg("subnet_prefix=0x%" PRIx64 "\n", - be64_to_cpu(backend_dev->gid.global.subnet_prefix)); - pr_dbg("interface_id=0x%" PRIx64 "\n", - be64_to_cpu(backend_dev->gid.global.interface_id)); backend_dev->comp_thread.run = false; backend_dev->comp_thread.is_running = false; @@ -886,6 +1281,7 @@ void rdma_backend_stop(RdmaBackendDev *backend_dev) void rdma_backend_fini(RdmaBackendDev *backend_dev) { rdma_backend_stop(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); |