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-rw-r--r--hw/rdma/Makefile.objs2
-rw-r--r--hw/rdma/rdma_backend.c818
-rw-r--r--hw/rdma/rdma_backend.h98
-rw-r--r--hw/rdma/rdma_rm.c544
-rw-r--r--hw/rdma/rdma_rm.h69
-rw-r--r--hw/rdma/trace-events5
6 files changed, 1535 insertions, 1 deletions
diff --git a/hw/rdma/Makefile.objs b/hw/rdma/Makefile.objs
index cdffe4a9a3..6a59bf0d5b 100644
--- a/hw/rdma/Makefile.objs
+++ b/hw/rdma/Makefile.objs
@@ -1,3 +1,3 @@
ifeq ($(CONFIG_RDMA),y)
-obj-$(CONFIG_PCI) += rdma_utils.o
+obj-$(CONFIG_PCI) += rdma_utils.o rdma_backend.o rdma_rm.o
endif
diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c
new file mode 100644
index 0000000000..e306fba534
--- /dev/null
+++ b/hw/rdma/rdma_backend.c
@@ -0,0 +1,818 @@
+/*
+ * 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 <qemu/error-report.h>
+#include <qapi/error.h>
+
+#include <infiniband/verbs.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
+
+typedef struct BackendCtx {
+ uint64_t req_id;
+ void *up_ctx;
+ bool is_tx_req;
+} BackendCtx;
+
+static void (*comp_handler)(int status, unsigned int vendor_err, void *ctx);
+
+static void dummy_comp_handler(int status, unsigned int vendor_err, void *ctx)
+{
+ pr_err("No completion handler is registered\n");
+}
+
+static void poll_cq(RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq)
+{
+ int i, ne;
+ BackendCtx *bctx;
+ struct ibv_wc wc[2];
+
+ pr_dbg("Entering poll_cq loop on cq %p\n", ibcq);
+ do {
+ ne = ibv_poll_cq(ibcq, ARRAY_SIZE(wc), wc);
+
+ pr_dbg("Got %d completion(s) from cq %p\n", ne, ibcq);
+
+ for (i = 0; i < ne; i++) {
+ pr_dbg("wr_id=0x%lx\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 %ld\n", 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);
+
+ rdma_rm_dealloc_cqe_ctx(rdma_dev_res, wc[i].wr_id);
+ g_free(bctx);
+ }
+ } while (ne > 0);
+
+ if (ne < 0) {
+ pr_dbg("Got error %d from ibv_poll_cq\n", ne);
+ }
+}
+
+static void *comp_handler_thread(void *arg)
+{
+ RdmaBackendDev *backend_dev = (RdmaBackendDev *)arg;
+ int rc;
+ struct ibv_cq *ev_cq;
+ void *ev_ctx;
+
+ pr_dbg("Starting\n");
+
+ while (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);
+ continue;
+ }
+
+ rc = ibv_req_notify_cq(ev_cq, 0);
+ if (unlikely(rc)) {
+ pr_dbg("Error %d from ibv_req_notify_cq\n", rc);
+ }
+
+ 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 */
+
+ return NULL;
+}
+
+void rdma_backend_register_comp_handler(void (*handler)(int status,
+ unsigned int vendor_err, void *ctx))
+{
+ 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) {
+ pr_dbg("Error %d from ibv_query_port\n", rc);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq)
+{
+ poll_cq(rdma_dev_res, cq->ibcq);
+}
+
+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_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);
+ pr_dbg("ibv_create_ah failed for gid <%lx %lx>\n",
+ 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));
+ }
+
+ 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)
+{
+ 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);
+ return VENDOR_ERR_INVLKEY | ssge[ssge_idx].lkey;
+ }
+
+ dsge->addr = mr->user_mr.host_virt + ssge[ssge_idx].addr -
+ mr->user_mr.guest_start;
+ dsge->length = ssge[ssge_idx].length;
+ dsge->lkey = rdma_backend_mr_lkey(&mr->backend_mr);
+
+ pr_dbg("ssge->addr=0x%lx\n", (uint64_t)ssge[ssge_idx].addr);
+ pr_dbg("dsge->addr=0x%lx\n", dsge->addr);
+ pr_dbg("dsge->length=%d\n", dsge->length);
+ pr_dbg("dsge->lkey=0x%x\n", dsge->lkey);
+
+ dsge++;
+ }
+
+ 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)
+{
+ BackendCtx *bctx;
+ struct ibv_sge new_sge[MAX_SGE];
+ uint32_t bctx_id;
+ int rc;
+ struct ibv_send_wr wr = {0}, *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);
+ } else if (qp_type == IBV_QPT_GSI) {
+ pr_dbg("QP1\n");
+ comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_MAD_SEND, 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);
+ return;
+ }
+
+ bctx = g_malloc0(sizeof(*bctx));
+ bctx->up_ctx = ctx;
+ bctx->is_tx_req = 1;
+
+ 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;
+ }
+
+ 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);
+ 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.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);
+ 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;
+ }
+
+ return;
+
+out_dealloc_cqe_ctx:
+ rdma_rm_dealloc_cqe_ctx(backend_dev->rdma_dev_res, bctx_id);
+
+out_free_bctx:
+ g_free(bctx);
+}
+
+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)
+{
+ BackendCtx *bctx;
+ struct ibv_sge new_sge[MAX_SGE];
+ uint32_t bctx_id;
+ int rc;
+ struct ibv_recv_wr wr = {0}, *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);
+ }
+ if (qp_type == IBV_QPT_GSI) {
+ pr_dbg("QP1\n");
+ comp_handler(IBV_WC_GENERAL_ERR, VENDOR_ERR_MAD_SEND, 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);
+ return;
+ }
+
+ bctx = g_malloc0(sizeof(*bctx));
+ bctx->up_ctx = ctx;
+ bctx->is_tx_req = 0;
+
+ 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);
+ 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);
+ goto out_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);
+ 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;
+ }
+
+ return;
+
+out_dealloc_cqe_ctx:
+ rdma_rm_dealloc_cqe_ctx(rdma_dev_res, bctx_id);
+
+out_free_bctx:
+ g_free(bctx);
+}
+
+int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd)
+{
+ pd->ibpd = ibv_alloc_pd(backend_dev->context);
+
+ return pd->ibpd ? 0 : -EIO;
+}
+
+void rdma_backend_destroy_pd(RdmaBackendPD *pd)
+{
+ if (pd->ibpd) {
+ ibv_dealloc_pd(pd->ibpd);
+ }
+}
+
+int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, uint64_t addr,
+ size_t length, int access)
+{
+ pr_dbg("addr=0x%lx\n", addr);
+ pr_dbg("len=%ld\n", length);
+ mr->ibmr = ibv_reg_mr(pd->ibpd, (void *)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;
+ }
+
+ return mr->ibmr ? 0 : -EIO;
+}
+
+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;
+
+ 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) {
+ 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;
+ }
+
+ return cq->ibcq ? 0 : -EIO;
+}
+
+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, 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};
+
+ 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:
+ /* fall through */
+ case IBV_QPT_UD:
+ /* do nothing */
+ break;
+
+ default:
+ pr_dbg("Unsupported QP type %d\n", 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;
+
+ 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);
+
+ qp->ibqp = ibv_create_qp(pd->ibpd, &attr);
+ if (likely(!qp->ibqp)) {
+ pr_dbg("Error from ibv_create_qp\n");
+ return -EIO;
+ }
+
+ 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};
+ 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;
+ attr.port_num = backend_dev->port_num;
+
+ switch (qp_type) {
+ case IBV_QPT_RC:
+ attr_mask |= IBV_QP_ACCESS_FLAGS;
+ break;
+
+ case IBV_QPT_UD:
+ attr.qkey = qkey;
+ attr_mask |= IBV_QP_QKEY;
+ break;
+
+ default:
+ pr_dbg("Unsupported QP type %d\n", 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);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+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)
+{
+ struct ibv_qp_attr attr = {0};
+ 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;
+
+ switch (qp_type) {
+ case IBV_QPT_RC:
+ pr_dbg("dgid=0x%lx,%lx\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.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 = backend_dev->backend_gid_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;
+ break;
+
+ case IBV_QPT_UD:
+ if (use_qkey) {
+ pr_dbg("qkey=0x%x\n", qkey);
+ attr.qkey = qkey;
+ attr_mask |= IBV_QP_QKEY;
+ }
+ break;
+ }
+
+ rc = ibv_modify_qp(qp->ibqp, &attr, attr_mask);
+ if (rc) {
+ pr_dbg("Error %d from ibv_modify_qp\n", rc);
+ 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 = {0};
+ 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;
+
+ 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;
+ break;
+
+ case IBV_QPT_UD:
+ if (use_qkey) {
+ pr_dbg("qkey=0x%x\n", qkey);
+ attr.qkey = qkey;
+ attr_mask |= IBV_QP_QKEY;
+ }
+ break;
+ }
+
+ rc = ibv_modify_qp(qp->ibqp, &attr, attr_mask);
+ if (rc) {
+ pr_dbg("Error %d from ibv_modify_qp\n", rc);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+void rdma_backend_destroy_qp(RdmaBackendQP *qp)
+{
+ if (qp->ibqp) {
+ ibv_destroy_qp(qp->ibqp);
+ }
+}
+
+#define CHK_ATTR(req, dev, member, fmt) ({ \
+ pr_dbg("%s="fmt","fmt"\n", #member, dev.member, req->member); \
+ if (req->member > dev.member) { \
+ warn_report("%s = 0x%lx is higher than host device capability 0x%lx", \
+ #member, (uint64_t)req->member, (uint64_t)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)) {
+ return -EIO;
+ }
+
+ CHK_ATTR(dev_attr, backend_dev->dev_attr, max_mr_size, "%ld");
+ 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");
+
+ return 0;
+}
+
+int rdma_backend_init(RdmaBackendDev *backend_dev,
+ 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)
+{
+ int i;
+ int ret = 0;
+ int num_ibv_devices;
+ char thread_name[THR_NAME_LEN] = {0};
+ struct ibv_device **dev_list;
+ struct ibv_port_attr port_attr;
+
+ backend_dev->backend_gid_idx = backend_gid_idx;
+ 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) {
+ error_setg(errp, "Failed to get IB devices list");
+ return -EIO;
+ }
+
+ if (num_ibv_devices == 0) {
+ error_setg(errp, "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) {
+ error_setg(errp, "Failed to find IB device %s",
+ backend_device_name);
+ ret = -EIO;
+ goto out_free_dev_list;
+ }
+ } else {
+ 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);
+
+ backend_dev->context = ibv_open_device(backend_dev->ib_dev);
+ if (!backend_dev->context) {
+ error_setg(errp, "Failed to open IB device");
+ 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");
+ 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");
+ 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);
+ 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%lx\n",
+ be64_to_cpu(backend_dev->gid.global.subnet_prefix));
+ pr_dbg("interface_id=0x%lx\n",
+ be64_to_cpu(backend_dev->gid.global.interface_id));
+
+ 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);
+
+ 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_fini(RdmaBackendDev *backend_dev)
+{
+ g_hash_table_destroy(ah_hash);
+ ibv_destroy_comp_channel(backend_dev->channel);
+ ibv_close_device(backend_dev->context);
+}
diff --git a/hw/rdma/rdma_backend.h b/hw/rdma/rdma_backend.h
new file mode 100644
index 0000000000..68f2b05ca7
--- /dev/null
+++ b/hw/rdma/rdma_backend.h
@@ -0,0 +1,98 @@
+/*
+ * RDMA device: Definitions of Backend Device functions
+ *
+ * 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.
+ *
+ */
+
+#ifndef RDMA_BACKEND_H
+#define RDMA_BACKEND_H
+
+#include <qapi/error.h>
+#include "rdma_rm_defs.h"
+#include "rdma_backend_defs.h"
+
+/* Add definition for QP0 and QP1 as there is no userspace enums for them */
+enum ibv_special_qp_type {
+ IBV_QPT_SMI = 0,
+ IBV_QPT_GSI = 1,
+};
+
+static inline union ibv_gid *rdma_backend_gid(RdmaBackendDev *dev)
+{
+ return &dev->gid;
+}
+
+static inline uint32_t rdma_backend_qpn(const RdmaBackendQP *qp)
+{
+ return qp->ibqp ? qp->ibqp->qp_num : 0;
+}
+
+static inline uint32_t rdma_backend_mr_lkey(const RdmaBackendMR *mr)
+{
+ return mr->ibmr ? mr->ibmr->lkey : 0;
+}
+
+static inline uint32_t rdma_backend_mr_rkey(const RdmaBackendMR *mr)
+{
+ return mr->ibmr ? mr->ibmr->rkey : 0;
+}
+
+int rdma_backend_init(RdmaBackendDev *backend_dev,
+ 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);
+void rdma_backend_fini(RdmaBackendDev *backend_dev);
+void rdma_backend_register_comp_handler(void (*handler)(int status,
+ unsigned int vendor_err, void *ctx));
+void rdma_backend_unregister_comp_handler(void);
+
+int rdma_backend_query_port(RdmaBackendDev *backend_dev,
+ struct ibv_port_attr *port_attr);
+int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd);
+void rdma_backend_destroy_pd(RdmaBackendPD *pd);
+
+int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, uint64_t addr,
+ size_t length, int access);
+void rdma_backend_destroy_mr(RdmaBackendMR *mr);
+
+int rdma_backend_create_cq(RdmaBackendDev *backend_dev, RdmaBackendCQ *cq,
+ int cqe);
+void rdma_backend_destroy_cq(RdmaBackendCQ *cq);
+void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, 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);
+int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
+ uint8_t qp_type, uint32_t qkey);
+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);
+int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t qp_type,
+ uint32_t sq_psn, uint32_t qkey, bool use_qkey);
+void rdma_backend_destroy_qp(RdmaBackendQP *qp);
+
+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);
+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);
+
+#endif
diff --git a/hw/rdma/rdma_rm.c b/hw/rdma/rdma_rm.c
new file mode 100644
index 0000000000..b5fc45ddab
--- /dev/null
+++ b/hw/rdma/rdma_rm.c
@@ -0,0 +1,544 @@
+/*
+ * QEMU paravirtual RDMA - Resource Manager Implementation
+ *
+ * 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/error.h>
+#include <cpu.h>
+
+#include "rdma_utils.h"
+#include "rdma_backend.h"
+#include "rdma_rm.h"
+
+#define MAX_RM_TBL_NAME 16
+
+/* Page directory and page tables */
+#define PG_DIR_SZ { TARGET_PAGE_SIZE / sizeof(__u64) }
+#define PG_TBL_SZ { TARGET_PAGE_SIZE / sizeof(__u64) }
+
+static inline void res_tbl_init(const char *name, RdmaRmResTbl *tbl,
+ uint32_t tbl_sz, uint32_t res_sz)
+{
+ tbl->tbl = g_malloc(tbl_sz * res_sz);
+
+ strncpy(tbl->name, name, MAX_RM_TBL_NAME);
+ tbl->name[MAX_RM_TBL_NAME - 1] = 0;
+
+ tbl->bitmap = bitmap_new(tbl_sz);
+ tbl->tbl_sz = tbl_sz;
+ tbl->res_sz = res_sz;
+ qemu_mutex_init(&tbl->lock);
+}
+
+static inline void res_tbl_free(RdmaRmResTbl *tbl)
+{
+ qemu_mutex_destroy(&tbl->lock);
+ g_free(tbl->tbl);
+ bitmap_zero_extend(tbl->bitmap, tbl->tbl_sz, 0);
+}
+
+static inline void *res_tbl_get(RdmaRmResTbl *tbl, uint32_t handle)
+{
+ pr_dbg("%s, handle=%d\n", tbl->name, handle);
+
+ if ((handle < tbl->tbl_sz) && (test_bit(handle, tbl->bitmap))) {
+ return tbl->tbl + handle * tbl->res_sz;
+ } else {
+ pr_dbg("Invalid handle %d\n", handle);
+ return NULL;
+ }
+}
+
+static inline void *res_tbl_alloc(RdmaRmResTbl *tbl, uint32_t *handle)
+{
+ qemu_mutex_lock(&tbl->lock);
+
+ *handle = find_first_zero_bit(tbl->bitmap, tbl->tbl_sz);
+ if (*handle > tbl->tbl_sz) {
+ pr_dbg("Failed to alloc, bitmap is full\n");
+ qemu_mutex_unlock(&tbl->lock);
+ return NULL;
+ }
+
+ set_bit(*handle, tbl->bitmap);
+
+ qemu_mutex_unlock(&tbl->lock);
+
+ memset(tbl->tbl + *handle * tbl->res_sz, 0, tbl->res_sz);
+
+ pr_dbg("%s, handle=%d\n", tbl->name, *handle);
+
+ return tbl->tbl + *handle * tbl->res_sz;
+}
+
+static inline void res_tbl_dealloc(RdmaRmResTbl *tbl, uint32_t handle)
+{
+ pr_dbg("%s, handle=%d\n", tbl->name, handle);
+
+ qemu_mutex_lock(&tbl->lock);
+
+ if (handle < tbl->tbl_sz) {
+ clear_bit(handle, tbl->bitmap);
+ }
+
+ qemu_mutex_unlock(&tbl->lock);
+}
+
+int rdma_rm_alloc_pd(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
+ uint32_t *pd_handle, uint32_t ctx_handle)
+{
+ RdmaRmPD *pd;
+ int ret = -ENOMEM;
+
+ pd = res_tbl_alloc(&dev_res->pd_tbl, pd_handle);
+ if (!pd) {
+ goto out;
+ }
+
+ ret = rdma_backend_create_pd(backend_dev, &pd->backend_pd);
+ if (ret) {
+ ret = -EIO;
+ goto out_tbl_dealloc;
+ }
+
+ pd->ctx_handle = ctx_handle;
+
+ return 0;
+
+out_tbl_dealloc:
+ res_tbl_dealloc(&dev_res->pd_tbl, *pd_handle);
+
+out:
+ return ret;
+}
+
+RdmaRmPD *rdma_rm_get_pd(RdmaDeviceResources *dev_res, uint32_t pd_handle)
+{
+ return res_tbl_get(&dev_res->pd_tbl, pd_handle);
+}
+
+void rdma_rm_dealloc_pd(RdmaDeviceResources *dev_res, uint32_t pd_handle)
+{
+ RdmaRmPD *pd = rdma_rm_get_pd(dev_res, pd_handle);
+
+ if (pd) {
+ rdma_backend_destroy_pd(&pd->backend_pd);
+ res_tbl_dealloc(&dev_res->pd_tbl, pd_handle);
+ }
+}
+
+int rdma_rm_alloc_mr(RdmaDeviceResources *dev_res, uint32_t pd_handle,
+ uint64_t guest_start, size_t guest_length, void *host_virt,
+ int access_flags, uint32_t *mr_handle, uint32_t *lkey,
+ uint32_t *rkey)
+{
+ RdmaRmMR *mr;
+ int ret = 0;
+ RdmaRmPD *pd;
+ uint64_t addr;
+ size_t length;
+
+ pd = rdma_rm_get_pd(dev_res, pd_handle);
+ if (!pd) {
+ pr_dbg("Invalid PD\n");
+ return -EINVAL;
+ }
+
+ mr = res_tbl_alloc(&dev_res->mr_tbl, mr_handle);
+ if (!mr) {
+ pr_dbg("Failed to allocate obj in table\n");
+ return -ENOMEM;
+ }
+
+ if (!host_virt) {
+ /* TODO: This is my guess but not so sure that this needs to be
+ * done */
+ length = TARGET_PAGE_SIZE;
+ addr = (uint64_t)g_malloc(length);
+ } else {
+ mr->user_mr.host_virt = (uint64_t) host_virt;
+ pr_dbg("host_virt=0x%lx\n", mr->user_mr.host_virt);
+ mr->user_mr.length = guest_length;
+ pr_dbg("length=0x%lx\n", guest_length);
+ mr->user_mr.guest_start = guest_start;
+ pr_dbg("guest_start=0x%lx\n", mr->user_mr.guest_start);
+
+ length = mr->user_mr.length;
+ addr = mr->user_mr.host_virt;
+ }
+
+ ret = rdma_backend_create_mr(&mr->backend_mr, &pd->backend_pd, addr, length,
+ access_flags);
+ if (ret) {
+ pr_dbg("Fail in rdma_backend_create_mr, err=%d\n", ret);
+ ret = -EIO;
+ goto out_dealloc_mr;
+ }
+
+ if (!host_virt) {
+ *lkey = mr->lkey = rdma_backend_mr_lkey(&mr->backend_mr);
+ *rkey = mr->rkey = rdma_backend_mr_rkey(&mr->backend_mr);
+ } else {
+ /* We keep mr_handle in lkey so send and recv get get mr ptr */
+ *lkey = *mr_handle;
+ *rkey = -1;
+ }
+
+ mr->pd_handle = pd_handle;
+
+ return 0;
+
+out_dealloc_mr:
+ res_tbl_dealloc(&dev_res->mr_tbl, *mr_handle);
+
+ return ret;
+}
+
+RdmaRmMR *rdma_rm_get_mr(RdmaDeviceResources *dev_res, uint32_t mr_handle)
+{
+ return res_tbl_get(&dev_res->mr_tbl, mr_handle);
+}
+
+void rdma_rm_dealloc_mr(RdmaDeviceResources *dev_res, uint32_t mr_handle)
+{
+ RdmaRmMR *mr = rdma_rm_get_mr(dev_res, mr_handle);
+
+ if (mr) {
+ rdma_backend_destroy_mr(&mr->backend_mr);
+ munmap((void *)mr->user_mr.host_virt, mr->user_mr.length);
+ res_tbl_dealloc(&dev_res->mr_tbl, mr_handle);
+ }
+}
+
+int rdma_rm_alloc_uc(RdmaDeviceResources *dev_res, uint32_t pfn,
+ uint32_t *uc_handle)
+{
+ RdmaRmUC *uc;
+
+ /* TODO: Need to make sure pfn is between bar start address and
+ * bsd+RDMA_BAR2_UAR_SIZE
+ if (pfn > RDMA_BAR2_UAR_SIZE) {
+ pr_err("pfn out of range (%d > %d)\n", pfn, RDMA_BAR2_UAR_SIZE);
+ return -ENOMEM;
+ }
+ */
+
+ uc = res_tbl_alloc(&dev_res->uc_tbl, uc_handle);
+ if (!uc) {
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+RdmaRmUC *rdma_rm_get_uc(RdmaDeviceResources *dev_res, uint32_t uc_handle)
+{
+ return res_tbl_get(&dev_res->uc_tbl, uc_handle);
+}
+
+void rdma_rm_dealloc_uc(RdmaDeviceResources *dev_res, uint32_t uc_handle)
+{
+ RdmaRmUC *uc = rdma_rm_get_uc(dev_res, uc_handle);
+
+ if (uc) {
+ res_tbl_dealloc(&dev_res->uc_tbl, uc_handle);
+ }
+}
+
+RdmaRmCQ *rdma_rm_get_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle)
+{
+ return res_tbl_get(&dev_res->cq_tbl, cq_handle);
+}
+
+int rdma_rm_alloc_cq(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
+ uint32_t cqe, uint32_t *cq_handle, void *opaque)
+{
+ int rc;
+ RdmaRmCQ *cq;
+
+ cq = res_tbl_alloc(&dev_res->cq_tbl, cq_handle);
+ if (!cq) {
+ return -ENOMEM;
+ }
+
+ cq->opaque = opaque;
+ cq->notify = false;
+
+ rc = rdma_backend_create_cq(backend_dev, &cq->backend_cq, cqe);
+ if (rc) {
+ rc = -EIO;
+ goto out_dealloc_cq;
+ }
+
+ return 0;
+
+out_dealloc_cq:
+ rdma_rm_dealloc_cq(dev_res, *cq_handle);
+
+ return rc;
+}
+
+void rdma_rm_req_notify_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle,
+ bool notify)
+{
+ RdmaRmCQ *cq;
+
+ pr_dbg("cq_handle=%d, notify=0x%x\n", cq_handle, notify);
+
+ cq = rdma_rm_get_cq(dev_res, cq_handle);
+ if (!cq) {
+ return;
+ }
+
+ cq->notify = notify;
+ pr_dbg("notify=%d\n", cq->notify);
+}
+
+void rdma_rm_dealloc_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle)
+{
+ RdmaRmCQ *cq;
+
+ cq = rdma_rm_get_cq(dev_res, cq_handle);
+ if (!cq) {
+ return;
+ }
+
+ rdma_backend_destroy_cq(&cq->backend_cq);
+
+ res_tbl_dealloc(&dev_res->cq_tbl, cq_handle);
+}
+
+RdmaRmQP *rdma_rm_get_qp(RdmaDeviceResources *dev_res, uint32_t qpn)
+{
+ GBytes *key = g_bytes_new(&qpn, sizeof(qpn));
+
+ RdmaRmQP *qp = g_hash_table_lookup(dev_res->qp_hash, key);
+
+ g_bytes_unref(key);
+
+ return qp;
+}
+
+int rdma_rm_alloc_qp(RdmaDeviceResources *dev_res, uint32_t pd_handle,
+ uint8_t qp_type, uint32_t max_send_wr,
+ uint32_t max_send_sge, uint32_t send_cq_handle,
+ uint32_t max_recv_wr, uint32_t max_recv_sge,
+ uint32_t recv_cq_handle, void *opaque, uint32_t *qpn)
+{
+ int rc;
+ RdmaRmQP *qp;
+ RdmaRmCQ *scq, *rcq;
+ RdmaRmPD *pd;
+ uint32_t rm_qpn;
+
+ pr_dbg("qp_type=%d\n", qp_type);
+
+ pd = rdma_rm_get_pd(dev_res, pd_handle);
+ if (!pd) {
+ pr_err("Invalid pd handle (%d)\n", pd_handle);
+ return -EINVAL;
+ }
+
+ scq = rdma_rm_get_cq(dev_res, send_cq_handle);
+ rcq = rdma_rm_get_cq(dev_res, recv_cq_handle);
+
+ if (!scq || !rcq) {
+ pr_err("Invalid send_cqn or recv_cqn (%d, %d)\n",
+ send_cq_handle, recv_cq_handle);
+ return -EINVAL;
+ }
+
+ qp = res_tbl_alloc(&dev_res->qp_tbl, &rm_qpn);
+ if (!qp) {
+ return -ENOMEM;
+ }
+ pr_dbg("rm_qpn=%d\n", rm_qpn);
+
+ qp->qpn = rm_qpn;
+ qp->qp_state = IBV_QPS_RESET;
+ qp->qp_type = qp_type;
+ qp->send_cq_handle = send_cq_handle;
+ qp->recv_cq_handle = recv_cq_handle;
+ qp->opaque = opaque;
+
+ rc = rdma_backend_create_qp(&qp->backend_qp, qp_type, &pd->backend_pd,
+ &scq->backend_cq, &rcq->backend_cq, max_send_wr,
+ max_recv_wr, max_send_sge, max_recv_sge);
+ if (rc) {
+ rc = -EIO;
+ goto out_dealloc_qp;
+ }
+
+ *qpn = rdma_backend_qpn(&qp->backend_qp);
+ pr_dbg("rm_qpn=%d, backend_qpn=0x%x\n", rm_qpn, *qpn);
+ g_hash_table_insert(dev_res->qp_hash, g_bytes_new(qpn, sizeof(*qpn)), qp);
+
+ return 0;
+
+out_dealloc_qp:
+ res_tbl_dealloc(&dev_res->qp_tbl, qp->qpn);
+
+ return rc;
+}
+
+int rdma_rm_modify_qp(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
+ uint32_t qp_handle, uint32_t attr_mask,
+ union ibv_gid *dgid, uint32_t dqpn,
+ enum ibv_qp_state qp_state, uint32_t qkey,
+ uint32_t rq_psn, uint32_t sq_psn)
+{
+ RdmaRmQP *qp;
+ int ret;
+
+ pr_dbg("qpn=%d\n", qp_handle);
+
+ qp = rdma_rm_get_qp(dev_res, qp_handle);
+ if (!qp) {
+ return -EINVAL;
+ }
+
+ pr_dbg("qp_type=%d\n", qp->qp_type);
+ pr_dbg("attr_mask=0x%x\n", attr_mask);
+
+ if (qp->qp_type == IBV_QPT_SMI) {
+ pr_dbg("QP0 unsupported\n");
+ return -EPERM;
+ } else if (qp->qp_type == IBV_QPT_GSI) {
+ pr_dbg("QP1\n");
+ return 0;
+ }
+
+ if (attr_mask & IBV_QP_STATE) {
+ qp->qp_state = qp_state;
+ pr_dbg("qp_state=%d\n", qp->qp_state);
+
+ if (qp->qp_state == IBV_QPS_INIT) {
+ ret = rdma_backend_qp_state_init(backend_dev, &qp->backend_qp,
+ qp->qp_type, qkey);
+ if (ret) {
+ return -EIO;
+ }
+ }
+
+ if (qp->qp_state == IBV_QPS_RTR) {
+ ret = rdma_backend_qp_state_rtr(backend_dev, &qp->backend_qp,
+ qp->qp_type, dgid, dqpn, rq_psn,
+ qkey, attr_mask & IBV_QP_QKEY);
+ if (ret) {
+ return -EIO;
+ }
+ }
+
+ if (qp->qp_state == IBV_QPS_RTS) {
+ ret = rdma_backend_qp_state_rts(&qp->backend_qp, qp->qp_type,
+ sq_psn, qkey,
+ attr_mask & IBV_QP_QKEY);
+ if (ret) {
+ return -EIO;
+ }
+ }
+ }
+
+ return 0;
+}
+
+void rdma_rm_dealloc_qp(RdmaDeviceResources *dev_res, uint32_t qp_handle)
+{
+ RdmaRmQP *qp;
+ GBytes *key;
+
+ key = g_bytes_new(&qp_handle, sizeof(qp_handle));
+ qp = g_hash_table_lookup(dev_res->qp_hash, key);
+ g_hash_table_remove(dev_res->qp_hash, key);
+ g_bytes_unref(key);
+
+ if (!qp) {
+ return;
+ }
+
+ rdma_backend_destroy_qp(&qp->backend_qp);
+
+ res_tbl_dealloc(&dev_res->qp_tbl, qp->qpn);
+}
+
+void *rdma_rm_get_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t cqe_ctx_id)
+{
+ void **cqe_ctx;
+
+ cqe_ctx = res_tbl_get(&dev_res->cqe_ctx_tbl, cqe_ctx_id);
+ if (!cqe_ctx) {
+ return NULL;
+ }
+
+ pr_dbg("ctx=%p\n", *cqe_ctx);
+
+ return *cqe_ctx;
+}
+
+int rdma_rm_alloc_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t *cqe_ctx_id,
+ void *ctx)
+{
+ void **cqe_ctx;
+
+ cqe_ctx = res_tbl_alloc(&dev_res->cqe_ctx_tbl, cqe_ctx_id);
+ if (!cqe_ctx) {
+ return -ENOMEM;
+ }
+
+ pr_dbg("ctx=%p\n", ctx);
+ *cqe_ctx = ctx;
+
+ return 0;
+}
+
+void rdma_rm_dealloc_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t cqe_ctx_id)
+{
+ res_tbl_dealloc(&dev_res->cqe_ctx_tbl, cqe_ctx_id);
+}
+
+static void destroy_qp_hash_key(gpointer data)
+{
+ g_bytes_unref(data);
+}
+
+int rdma_rm_init(RdmaDeviceResources *dev_res, struct ibv_device_attr *dev_attr,
+ Error **errp)
+{
+ dev_res->qp_hash = g_hash_table_new_full(g_bytes_hash, g_bytes_equal,
+ destroy_qp_hash_key, NULL);
+ if (!dev_res->qp_hash) {
+ return -ENOMEM;
+ }
+
+ res_tbl_init("PD", &dev_res->pd_tbl, dev_attr->max_pd, sizeof(RdmaRmPD));
+ res_tbl_init("CQ", &dev_res->cq_tbl, dev_attr->max_cq, sizeof(RdmaRmCQ));
+ res_tbl_init("MR", &dev_res->mr_tbl, dev_attr->max_mr, sizeof(RdmaRmMR));
+ res_tbl_init("QP", &dev_res->qp_tbl, dev_attr->max_qp, sizeof(RdmaRmQP));
+ res_tbl_init("CQE_CTX", &dev_res->cqe_ctx_tbl, dev_attr->max_qp *
+ dev_attr->max_qp_wr, sizeof(void *));
+ res_tbl_init("UC", &dev_res->uc_tbl, MAX_UCS, sizeof(RdmaRmUC));
+
+ return 0;
+}
+
+void rdma_rm_fini(RdmaDeviceResources *dev_res)
+{
+ res_tbl_free(&dev_res->uc_tbl);
+ res_tbl_free(&dev_res->cqe_ctx_tbl);
+ res_tbl_free(&dev_res->qp_tbl);
+ res_tbl_free(&dev_res->cq_tbl);
+ res_tbl_free(&dev_res->mr_tbl);
+ res_tbl_free(&dev_res->pd_tbl);
+ g_hash_table_destroy(dev_res->qp_hash);
+}
diff --git a/hw/rdma/rdma_rm.h b/hw/rdma/rdma_rm.h
new file mode 100644
index 0000000000..be95c1b0f4
--- /dev/null
+++ b/hw/rdma/rdma_rm.h
@@ -0,0 +1,69 @@
+/*
+ * RDMA device: Definitions of Resource Manager functions
+ *
+ * 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.
+ *
+ */
+
+#ifndef RDMA_RM_H
+#define RDMA_RM_H
+
+#include <qapi/error.h>
+#include "rdma_backend_defs.h"
+#include "rdma_rm_defs.h"
+
+int rdma_rm_init(RdmaDeviceResources *dev_res, struct ibv_device_attr *dev_attr,
+ Error **errp);
+void rdma_rm_fini(RdmaDeviceResources *dev_res);
+
+int rdma_rm_alloc_pd(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
+ uint32_t *pd_handle, uint32_t ctx_handle);
+RdmaRmPD *rdma_rm_get_pd(RdmaDeviceResources *dev_res, uint32_t pd_handle);
+void rdma_rm_dealloc_pd(RdmaDeviceResources *dev_res, uint32_t pd_handle);
+
+int rdma_rm_alloc_mr(RdmaDeviceResources *dev_res, uint32_t pd_handle,
+ uint64_t guest_start, size_t guest_length, void *host_virt,
+ int access_flags, uint32_t *mr_handle, uint32_t *lkey,
+ uint32_t *rkey);
+RdmaRmMR *rdma_rm_get_mr(RdmaDeviceResources *dev_res, uint32_t mr_handle);
+void rdma_rm_dealloc_mr(RdmaDeviceResources *dev_res, uint32_t mr_handle);
+
+int rdma_rm_alloc_uc(RdmaDeviceResources *dev_res, uint32_t pfn,
+ uint32_t *uc_handle);
+RdmaRmUC *rdma_rm_get_uc(RdmaDeviceResources *dev_res, uint32_t uc_handle);
+void rdma_rm_dealloc_uc(RdmaDeviceResources *dev_res, uint32_t uc_handle);
+
+int rdma_rm_alloc_cq(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
+ uint32_t cqe, uint32_t *cq_handle, void *opaque);
+RdmaRmCQ *rdma_rm_get_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle);
+void rdma_rm_req_notify_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle,
+ bool notify);
+void rdma_rm_dealloc_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle);
+
+int rdma_rm_alloc_qp(RdmaDeviceResources *dev_res, uint32_t pd_handle,
+ uint8_t qp_type, uint32_t max_send_wr,
+ uint32_t max_send_sge, uint32_t send_cq_handle,
+ uint32_t max_recv_wr, uint32_t max_recv_sge,
+ uint32_t recv_cq_handle, void *opaque, uint32_t *qpn);
+RdmaRmQP *rdma_rm_get_qp(RdmaDeviceResources *dev_res, uint32_t qpn);
+int rdma_rm_modify_qp(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
+ uint32_t qp_handle, uint32_t attr_mask,
+ union ibv_gid *dgid, uint32_t dqpn,
+ enum ibv_qp_state qp_state, uint32_t qkey,
+ uint32_t rq_psn, uint32_t sq_psn);
+void rdma_rm_dealloc_qp(RdmaDeviceResources *dev_res, uint32_t qp_handle);
+
+int rdma_rm_alloc_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t *cqe_ctx_id,
+ void *ctx);
+void *rdma_rm_get_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t cqe_ctx_id);
+void rdma_rm_dealloc_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t cqe_ctx_id);
+
+#endif
diff --git a/hw/rdma/trace-events b/hw/rdma/trace-events
new file mode 100644
index 0000000000..c4c202e647
--- /dev/null
+++ b/hw/rdma/trace-events
@@ -0,0 +1,5 @@
+# See docs/tracing.txt for syntax documentation.
+
+#hw/rdma/rdma_backend.c
+create_ah_cache_hit(uint64_t subnet, uint64_t net_id) "subnet = 0x%"PRIx64" net_id = 0x%"PRIx64
+create_ah_cache_miss(uint64_t subnet, uint64_t net_id) "subnet = 0x%"PRIx64" net_id = 0x%"PRIx64
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-22 20:07:35 +0000