diff options
Diffstat (limited to 'hw/rdma/rdma_backend.c')
| -rw-r--r-- | hw/rdma/rdma_backend.c | 344 |
1 files changed, 243 insertions, 101 deletions
diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c index c6dedda555..1d496bbd95 100644 --- a/hw/rdma/rdma_backend.c +++ b/hw/rdma/rdma_backend.c @@ -15,15 +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" @@ -160,6 +163,77 @@ 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; @@ -300,11 +374,11 @@ static int build_host_sge_array(RdmaDeviceResources *rdma_dev_res, return 0; } -static int mad_send(RdmaBackendDev *backend_dev, struct ibv_sge *sge, - uint32_t num_sge) +static int mad_send(RdmaBackendDev *backend_dev, uint8_t sgid_idx, + union ibv_gid *sgid, struct ibv_sge *sge, uint32_t num_sge) { - struct backend_umad umad = {0}; - char *hdr, *msg; + RdmaCmMuxMsg msg = {0}; + char *hdr, *data; int ret; pr_dbg("num_sge=%d\n", num_sge); @@ -313,26 +387,31 @@ static int mad_send(RdmaBackendDev *backend_dev, struct ibv_sge *sge, return -EINVAL; } - umad.hdr.length = sge[0].length + sge[1].length; - pr_dbg("msg_len=%d\n", umad.hdr.length); + msg.hdr.op_code = RDMACM_MUX_OP_CODE_MAD; + memcpy(msg.hdr.sgid.raw, sgid->raw, sizeof(msg.hdr.sgid)); - if (umad.hdr.length > sizeof(umad.mad)) { + 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; } - umad.hdr.addr.qpn = htobe32(1); - umad.hdr.addr.grh_present = 1; - umad.hdr.addr.gid_index = backend_dev->backend_gid_idx; - memcpy(umad.hdr.addr.gid, backend_dev->gid.raw, sizeof(umad.hdr.addr.gid)); - umad.hdr.addr.hop_limit = 0xFF; + 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; } - msg = rdma_pci_dma_map(backend_dev->dev, sge[1].addr, sge[1].length); - if (!msg) { + 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; @@ -341,25 +420,27 @@ static int mad_send(RdmaBackendDev *backend_dev, struct ibv_sge *sge, pr_dbg_buf("mad_hdr", hdr, sge[0].length); pr_dbg_buf("mad_data", data, sge[1].length); - memcpy(&umad.mad[0], hdr, sge[0].length); - memcpy(&umad.mad[sge[0].length], msg, 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, msg, 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 = qemu_chr_fe_write(backend_dev->mad_chr_be, (const uint8_t *)&umad, - sizeof(umad)); - - pr_dbg("qemu_chr_fe_write=%d\n", ret); + 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 (ret != sizeof(umad)); + 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]; @@ -373,7 +454,7 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev, comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx); } else if (qp_type == IBV_QPT_GSI) { pr_dbg("QP1\n"); - rc = mad_send(backend_dev, sge, num_sge); + rc = mad_send(backend_dev, sgid_idx, sgid, sge, num_sge); if (rc) { comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_MAD_SEND, ctx); } else { @@ -409,8 +490,7 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev, } 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) { comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_FAIL_BACKEND, ctx); goto out_dealloc_cqe_ctx; @@ -715,9 +795,9 @@ 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 = { @@ -729,13 +809,15 @@ 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); @@ -747,7 +829,7 @@ 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 | @@ -756,8 +838,8 @@ 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; } @@ -873,29 +955,19 @@ static inline void build_mad_hdr(struct ibv_grh *grh, union ibv_gid *sgid, grh->dgid = *my_gid; pr_dbg("paylen=%d (net=0x%x)\n", paylen, grh->paylen); - pr_dbg("my_gid=0x%llx\n", my_gid->global.interface_id); - pr_dbg("gid=0x%llx\n", sgid->global.interface_id); -} - -static inline int mad_can_receieve(void *opaque) -{ - return sizeof(struct backend_umad); + pr_dbg("dgid=0x%llx\n", my_gid->global.interface_id); + pr_dbg("sgid=0x%llx\n", sgid->global.interface_id); } -static void mad_read(void *opaque, const uint8_t *buf, int size) +static void process_incoming_mad_req(RdmaBackendDev *backend_dev, + RdmaCmMuxMsg *msg) { - RdmaBackendDev *backend_dev = (RdmaBackendDev *)opaque; QObject *o_ctx_id; unsigned long cqe_ctx_id; BackendCtx *bctx; char *mad; - struct backend_umad *umad; - - assert(size != sizeof(umad)); - umad = (struct backend_umad *)buf; - pr_dbg("Got %d bytes\n", size); - pr_dbg("umad->hdr.length=%d\n", umad->hdr.length); + pr_dbg("umad_len=%d\n", msg->umad_len); #ifdef PVRDMA_DEBUG struct umad_hdr *hdr = (struct umad_hdr *)&msg->umad.mad; @@ -925,15 +997,16 @@ static void mad_read(void *opaque, const uint8_t *buf, int size) mad = rdma_pci_dma_map(backend_dev->dev, bctx->sge.addr, bctx->sge.length); - if (!mad || bctx->sge.length < umad->hdr.length + MAD_HDR_SIZE) { + if (!mad || bctx->sge.length < msg->umad_len + MAD_HDR_SIZE) { comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_INV_MAD_BUFF, bctx->up_ctx); } else { + 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 *)&umad->hdr.addr.gid, - &backend_dev->gid, umad->hdr.length); - memcpy(&mad[MAD_HDR_SIZE], umad->mad, umad->hdr.length); + (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); comp_handler(IBV_WC_SUCCESS, 0, bctx->up_ctx); @@ -943,56 +1016,151 @@ static void mad_read(void *opaque, const uint8_t *buf, int size) rdma_rm_dealloc_cqe_ctx(backend_dev->rdma_dev_res, cqe_ctx_id); } -static int mad_init(RdmaBackendDev *backend_dev) +static inline int rdmacm_mux_can_receive(void *opaque) { - struct backend_umad umad = {0}; - int ret; + RdmaBackendDev *backend_dev = (RdmaBackendDev *)opaque; - if (!qemu_chr_fe_backend_connected(backend_dev->mad_chr_be)) { - pr_dbg("Missing chardev for MAD multiplexer\n"); - return -EIO; + 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; - qemu_chr_fe_set_handlers(backend_dev->mad_chr_be, mad_can_receieve, - mad_read, NULL, NULL, backend_dev, NULL, true); + backend_dev->rdmacm_mux.chr_be = mad_chr_be; - /* Register ourself */ - memcpy(umad.hdr.addr.gid, backend_dev->gid.raw, sizeof(umad.hdr.addr.gid)); - ret = qemu_chr_fe_write(backend_dev->mad_chr_be, (const uint8_t *)&umad, - sizeof(umad.hdr)); - if (ret != sizeof(umad.hdr)) { - pr_dbg("Fail to register to rdma_umadmux (%d)\n", ret); + 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, - CharBackend *mad_chr_be, Error **errp) + 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->mad_chr_be = mad_chr_be; - backend_dev->backend_gid_idx = backend_gid_idx; backend_dev->port_num = port_num; backend_dev->rdma_dev_res = rdma_dev_res; @@ -1029,9 +1197,9 @@ 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) { @@ -1048,20 +1216,6 @@ 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"); @@ -1069,20 +1223,8 @@ 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); - if (ret) { - error_setg(errp, "Failed to query gid %d", - backend_dev->backend_gid_idx); - 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)); - ret = mad_init(backend_dev); + ret = mad_init(backend_dev, mad_chr_be); if (ret) { error_setg(errp, "Fail to initialize mad"); ret = -EIO; |