*/
#include "qemu/osdep.h"
-#include "qemu/error-report.h"
-#include "qapi/error.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"
-/* Vendor Errors */
-#define VENDOR_ERR_FAIL_BACKEND 0x201
-#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_MAD_SEND 0x206
-#define VENDOR_ERR_INVLKEY 0x207
-#define VENDOR_ERR_MR_SMALL 0x208
-
#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 */
+ RdmaBackendQP *backend_qp; /* To maintain recv buffers */
+ RdmaBackendSRQ *backend_srq;
} 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(void *ctx, struct ibv_wc *wc)
+{
+ rdma_error_report("No completion handler is registered");
+}
-static void dummy_comp_handler(int status, unsigned int vendor_err, void *ctx)
+static inline void complete_work(enum ibv_wc_status status, uint32_t vendor_err,
+ void *ctx)
{
- pr_err("No completion handler is registered\n");
+ struct ibv_wc wc = {};
+
+ wc.status = status;
+ wc.vendor_err = vendor_err;
+
+ comp_handler(ctx, &wc);
}
-static void poll_cq(RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq)
+static void free_cqe_ctx(gpointer data, gpointer user_data)
{
- int i, ne;
+ 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;
- pr_dbg("Entering poll_cq loop on cq %p\n", ibcq);
+ qemu_mutex_lock(&rdma_dev_res->lock);
do {
ne = ibv_poll_cq(ibcq, ARRAY_SIZE(wc), wc);
- pr_dbg("Got %d completion(s) from cq %p\n", ne, ibcq);
+ trace_rdma_poll_cq(ne, ibcq);
for (i = 0; i < ne; i++) {
- pr_dbg("wr_id=0x%" PRIx64 "\n", wc[i].wr_id);
- pr_dbg("status=%d\n", wc[i].status);
-
bctx = rdma_rm_get_cqe_ctx(rdma_dev_res, wc[i].wr_id);
if (unlikely(!bctx)) {
- pr_dbg("Error: Failed to find ctx for req %" PRId64 "\n",
- wc[i].wr_id);
+ rdma_error_report("No matching ctx for req %"PRId64,
+ wc[i].wr_id);
continue;
}
- 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]);
+ 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) {
- pr_dbg("Got error %d from ibv_poll_cq\n", ne);
+ 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)
flags = fcntl(backend_dev->channel->fd, F_GETFL);
rc = fcntl(backend_dev->channel->fd, F_SETFL, flags | O_NONBLOCK);
if (rc < 0) {
- pr_dbg("Fail to change to non-blocking mode\n");
+ rdma_error_report("Failed to change backend channel FD to non-blocking");
return NULL;
}
- pr_dbg("Starting\n");
-
pfds[0].fd = backend_dev->channel->fd;
pfds[0].events = G_IO_IN | G_IO_HUP | G_IO_ERR;
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) {
- pr_dbg("Waiting for completion on channel %p\n", backend_dev->channel);
rc = ibv_get_cq_event(backend_dev->channel, &ev_cq, &ev_ctx);
- pr_dbg("ibv_get_cq_event=%d\n", rc);
if (unlikely(rc)) {
- pr_dbg("---> ibv_get_cq_event (%d)\n", 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)) {
- pr_dbg("Error %d from ibv_req_notify_cq\n", rc);
+ rdma_error_report("ibv_req_notify_cq fail, rc=%d, errno=%d", rc,
+ errno);
}
- poll_cq(backend_dev->rdma_dev_res, ev_cq);
+ 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);
}
}
- pr_dbg("Going down\n");
-
- /* TODO: Post cqe for all remaining buffs that were posted */
-
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) {
- pr_dbg("Waiting for thread to complete\n");
sleep(THR_POLL_TO / SCALE_US / 2);
}
}
static void start_comp_thread(RdmaBackendDev *backend_dev)
{
- char thread_name[THR_NAME_LEN] = {0};
+ char thread_name[THR_NAME_LEN] = {};
stop_backend_thread(&backend_dev->comp_thread);
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;
}
rc = ibv_query_port(backend_dev->context, backend_dev->port_num, port_attr);
if (rc) {
- pr_dbg("Error %d from ibv_query_port\n", rc);
+ rdma_error_report("ibv_query_port fail, rc=%d, errno=%d", rc, errno);
return -EIO;
}
void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq)
{
- poll_cq(rdma_dev_res, cq->ibcq);
+ 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;
struct ibv_ah *ah = g_hash_table_lookup(ah_hash, ah_key);
if (ah) {
- trace_create_ah_cache_hit(be64_to_cpu(dgid->global.subnet_prefix),
- be64_to_cpu(dgid->global.interface_id));
+ 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 = {
g_hash_table_insert(ah_hash, ah_key, ah);
} else {
g_bytes_unref(ah_key);
- pr_dbg("Fail to create AH for gid <0x%" PRIx64 ", 0x%" PRIx64 ">\n",
- be64_to_cpu(dgid->global.subnet_prefix),
- be64_to_cpu(dgid->global.interface_id));
+ 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_create_ah_cache_miss(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 int build_host_sge_array(RdmaDeviceResources *rdma_dev_res,
struct ibv_sge *dsge, struct ibv_sge *ssge,
- uint8_t num_sge)
+ uint8_t num_sge, uint64_t *total_length)
{
RdmaRmMR *mr;
int ssge_idx;
- pr_dbg("num_sge=%d\n", num_sge);
-
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)) {
- pr_dbg("Invalid lkey 0x%x\n", ssge[ssge_idx].lkey);
+ rdma_error_report("Invalid lkey 0x%x", ssge[ssge_idx].lkey);
return VENDOR_ERR_INVLKEY | ssge[ssge_idx].lkey;
}
dsge->length = ssge[ssge_idx].length;
dsge->lkey = rdma_backend_mr_lkey(&mr->backend_mr);
- pr_dbg("ssge->addr=0x%" PRIx64 "\n", ssge[ssge_idx].addr);
- pr_dbg("dsge->addr=0x%" PRIx64 "\n", dsge->addr);
- pr_dbg("dsge->length=%d\n", dsge->length);
- pr_dbg("dsge->lkey=0x%x\n", dsge->lkey);
+ *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,
- 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];
uint32_t bctx_id;
int rc;
- struct ibv_send_wr wr = {0}, *bad_wr;
+ struct ibv_send_wr wr = {}, *bad_wr;
- if (!qp->ibqp) { /* This field does not get initialized for QP0 and QP1 */
+ if (!qp->ibqp) { /* This field is not 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);
+ rdma_error_report("Got QP0 request");
+ 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);
+ 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++;
+ }
}
- 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);
return;
}
bctx = g_malloc0(sizeof(*bctx));
bctx->up_ctx = ctx;
- bctx->is_tx_req = 1;
+ bctx->backend_qp = qp;
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);
- goto out_free_bctx;
+ complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx);
+ goto err_free_bctx;
}
- rc = build_host_sge_array(backend_dev->rdma_dev_res, new_sge, sge, num_sge);
+ 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) {
- pr_dbg("Error: Failed to build host SGE array\n");
- comp_handler(IBV_WC_GENERAL_ERR, rc, ctx);
- goto out_dealloc_cqe_ctx;
+ 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,
- 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 err_dealloc_cqe_ctx;
+ }
wr.wr.ud.remote_qpn = dqpn;
wr.wr.ud.remote_qkey = dqkey;
}
wr.wr_id = bctx_id;
rc = ibv_post_send(qp->ibqp, &wr, &bad_wr);
- pr_dbg("ibv_post_send=%d\n", rc);
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);
- goto out_dealloc_cqe_ctx;
+ 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;
-out_dealloc_cqe_ctx:
+err_dealloc_cqe_ctx:
+ backend_dev->rdma_dev_res->stats.tx_err++;
rdma_rm_dealloc_cqe_ctx(backend_dev->rdma_dev_res, bctx_id);
-out_free_bctx:
+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,
- RdmaDeviceResources *rdma_dev_res,
RdmaBackendQP *qp, uint8_t qp_type,
struct ibv_sge *sge, uint32_t num_sge, void *ctx)
{
struct ibv_sge new_sge[MAX_SGE];
uint32_t bctx_id;
int rc;
- struct ibv_recv_wr wr = {0}, *bad_wr;
+ 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) {
- pr_dbg("QP0 unsupported\n");
- comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_QP0, ctx);
+ rdma_error_report("Got QP0 request");
+ 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);
+ backend_dev->rdma_dev_res->stats.mad_rx_bufs_err++;
+ } else {
+ backend_dev->rdma_dev_res->stats.mad_rx_bufs++;
+ }
}
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);
- 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->is_tx_req = 0;
+ bctx->backend_srq = srq;
- rc = rdma_rm_alloc_cqe_ctx(rdma_dev_res, &bctx_id, bctx);
+ 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);
- goto out_free_bctx;
+ complete_work(IBV_WC_GENERAL_ERR, VENDOR_ERR_NOMEM, ctx);
+ goto err_free_bctx;
}
- rc = build_host_sge_array(rdma_dev_res, new_sge, sge, num_sge);
+ 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) {
- pr_dbg("Error: Failed to build host SGE array\n");
- comp_handler(IBV_WC_GENERAL_ERR, rc, ctx);
- goto out_dealloc_cqe_ctx;
+ 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);
- pr_dbg("ibv_post_recv=%d\n", rc);
+ rc = ibv_post_srq_recv(srq->ibsrq, &wr, &bad_wr);
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);
- goto out_dealloc_cqe_ctx;
+ 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;
-out_dealloc_cqe_ctx:
- rdma_rm_dealloc_cqe_ctx(rdma_dev_res, bctx_id);
+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);
-out_free_bctx:
+err_free_bctx:
g_free(bctx);
}
{
pd->ibpd = ibv_alloc_pd(backend_dev->context);
- return pd->ibpd ? 0 : -EIO;
+ if (!pd->ibpd) {
+ rdma_error_report("ibv_alloc_pd fail, errno=%d", errno);
+ return -EIO;
+ }
+
+ return 0;
}
void rdma_backend_destroy_pd(RdmaBackendPD *pd)
int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, void *addr,
size_t length, int access)
{
- pr_dbg("addr=0x%p\n", addr);
- pr_dbg("len=%zu\n", length);
mr->ibmr = ibv_reg_mr(pd->ibpd, addr, length, access);
- if (mr->ibmr) {
- pr_dbg("lkey=0x%x\n", mr->ibmr->lkey);
- pr_dbg("rkey=0x%x\n", mr->ibmr->rkey);
- mr->ibpd = pd->ibpd;
+ if (!mr->ibmr) {
+ rdma_error_report("ibv_reg_mr fail, errno=%d", errno);
+ return -EIO;
}
- return mr->ibmr ? 0 : -EIO;
+ mr->ibpd = pd->ibpd;
+
+ return 0;
}
void rdma_backend_destroy_mr(RdmaBackendMR *mr)
{
int rc;
- pr_dbg("cqe=%d\n", cqe);
-
- pr_dbg("dev->channel=%p\n", backend_dev->channel);
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;
+ }
- if (cq->ibcq) {
- rc = ibv_req_notify_cq(cq->ibcq, 0);
- if (rc) {
- pr_dbg("Error %d from ibv_req_notify_cq\n", rc);
- }
- cq->backend_dev = backend_dev;
+ rc = ibv_req_notify_cq(cq->ibcq, 0);
+ if (rc) {
+ rdma_warn_report("ibv_req_notify_cq fail, rc=%d, errno=%d", rc, errno);
}
- return cq->ibcq ? 0 : -EIO;
+ cq->backend_dev = backend_dev;
+
+ return 0;
}
void rdma_backend_destroy_cq(RdmaBackendCQ *cq)
int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t qp_type,
RdmaBackendPD *pd, RdmaBackendCQ *scq,
- RdmaBackendCQ *rcq, uint32_t max_send_wr,
- uint32_t max_recv_wr, uint32_t max_send_sge,
- uint32_t max_recv_sge)
+ 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 = {0};
+ struct ibv_qp_init_attr attr = {};
qp->ibqp = 0;
- pr_dbg("qp_type=%d\n", qp_type);
switch (qp_type) {
case IBV_QPT_GSI:
- pr_dbg("QP1 unsupported\n");
return 0;
case IBV_QPT_RC:
break;
default:
- pr_dbg("Unsupported QP type %d\n", qp_type);
+ rdma_error_report("Unsupported QP type %d", qp_type);
return -EIO;
}
attr.cap.max_recv_wr = max_recv_wr;
attr.cap.max_send_sge = max_send_sge;
attr.cap.max_recv_sge = max_recv_sge;
-
- pr_dbg("max_send_wr=%d\n", max_send_wr);
- pr_dbg("max_recv_wr=%d\n", max_recv_wr);
- pr_dbg("max_send_sge=%d\n", max_send_sge);
- pr_dbg("max_recv_sge=%d\n", max_recv_sge);
+ if (srq) {
+ attr.srq = srq->ibsrq;
+ }
qp->ibqp = ibv_create_qp(pd->ibpd, &attr);
- if (likely(!qp->ibqp)) {
- pr_dbg("Error from ibv_create_qp\n");
+ 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 */
- pr_dbg("qpn=0x%x\n", qp->ibqp->qp_num);
-
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 = {0};
+ struct ibv_qp_attr attr = {};
int rc, attr_mask;
- pr_dbg("qpn=0x%x\n", qp->ibqp->qp_num);
- pr_dbg("sport_num=%d\n", backend_dev->port_num);
-
attr_mask = IBV_QP_STATE | IBV_QP_PKEY_INDEX | IBV_QP_PORT;
attr.qp_state = IBV_QPS_INIT;
attr.pkey_index = 0;
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:
- pr_dbg("Unsupported QP type %d\n", qp_type);
+ rdma_error_report("Unsupported QP type %d", qp_type);
return -EIO;
}
rc = ibv_modify_qp(qp->ibqp, &attr, attr_mask);
if (rc) {
- pr_dbg("Error %d from ibv_modify_qp\n", rc);
+ rdma_error_report("ibv_modify_qp fail, rc=%d, errno=%d", rc, errno);
return -EIO;
}
}
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};
+ struct ibv_qp_attr attr = {};
union ibv_gid ibv_gid = {
.global.interface_id = dgid->global.interface_id,
.global.subnet_prefix = dgid->global.subnet_prefix
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("sport_num=%d\n", backend_dev->port_num);
- pr_dbg("rq_psn=0x%x\n", rq_psn);
-
attr.path_mtu = IBV_MTU_1024;
attr.dest_qp_num = dqpn;
attr.max_dest_rd_atomic = 1;
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 |
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) {
- pr_dbg("qkey=0x%x\n", 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) {
- pr_dbg("Error %d from ibv_modify_qp\n", rc);
+ rdma_error_report("ibv_modify_qp fail, rc=%d, errno=%d", rc, errno);
return -EIO;
}
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 = {0};
+ struct ibv_qp_attr attr = {};
int rc, attr_mask;
- pr_dbg("qpn=0x%x\n", qp->ibqp->qp_num);
- pr_dbg("sq_psn=0x%x\n", sq_psn);
-
attr.qp_state = IBV_QPS_RTS;
attr.sq_psn = sq_psn;
attr_mask = IBV_QP_STATE | IBV_QP_SQ_PSN;
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) {
- pr_dbg("qkey=0x%x\n", 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) {
- pr_dbg("Error %d from ibv_modify_qp\n", rc);
+ rdma_error_report("ibv_modify_qp fail, rc=%d, errno=%d", rc, errno);
return -EIO;
}
int attr_mask, struct ibv_qp_init_attr *init_attr)
{
if (!qp->ibqp) {
- pr_dbg("QP1\n");
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)
+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) ({ \
- pr_dbg("%s="fmt","fmt"\n", #member, dev.member, req->member); \
+ trace_rdma_check_dev_attr(#member, dev.member, req->member); \
if (req->member > dev.member) { \
- warn_report("%s = "fmt" is higher than host device capability "fmt, \
- #member, 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; \
} \
- pr_dbg("%s="fmt"\n", #member, req->member); })
+})
static int init_device_caps(RdmaBackendDev *backend_dev,
struct ibv_device_attr *dev_attr)
{
- if (ibv_query_device(backend_dev->context, &backend_dev->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;
}
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_mr_size, "%" PRId64);
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_qp, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_sge, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_qp_wr, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_cq, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_cqe, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_mr, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_pd, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_qp_rd_atom, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_qp_init_rd_atom, "%d");
- CHK_ATTR(dev_attr, backend_dev->dev_attr, max_ah, "%d");
+ 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;
}
-int rdma_backend_init(RdmaBackendDev *backend_dev,
+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,
- uint8_t backend_gid_idx, struct ibv_device_attr *dev_attr,
- Error **errp)
+ struct ibv_device_attr *dev_attr, CharBackend *mad_chr_be)
{
int i;
int ret = 0;
int num_ibv_devices;
struct ibv_device **dev_list;
- struct ibv_port_attr port_attr;
- backend_dev->backend_gid_idx = backend_gid_idx;
+ 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;
dev_list = ibv_get_device_list(&num_ibv_devices);
if (!dev_list) {
- error_setg(errp, "Failed to get IB devices list");
+ rdma_error_report("Failed to get IB devices list");
return -EIO;
}
if (num_ibv_devices == 0) {
- error_setg(errp, "No IB devices were found");
+ rdma_error_report("No IB devices were found");
ret = -ENXIO;
goto out_free_dev_list;
}
backend_dev->ib_dev = dev_list[i];
if (!backend_dev->ib_dev) {
- error_setg(errp, "Failed to find IB device %s",
- backend_device_name);
+ rdma_error_report("Failed to find IB device %s",
+ backend_device_name);
ret = -EIO;
goto out_free_dev_list;
}
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);
+ 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) {
- error_setg(errp, "Failed to open IB device");
+ 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) {
- error_setg(errp, "Failed to create IB communication channel");
+ rdma_error_report("Failed to create IB communication channel");
ret = -EIO;
goto out_close_device;
}
- 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");
+ rdma_error_report("Failed to initialize device capabilities");
ret = -EIO;
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);
+ rdma_error_report("Failed 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;
void rdma_backend_start(RdmaBackendDev *backend_dev)
{
- pr_dbg("Starting rdma_backend\n");
start_comp_thread(backend_dev);
}
void rdma_backend_stop(RdmaBackendDev *backend_dev)
{
- pr_dbg("Stopping rdma_backend\n");
+ mad_stop(backend_dev);
stop_backend_thread(&backend_dev->comp_thread);
}
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);
projects / qemu.git / blobdiff