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[Qemu-devel] [PATCH v6 07/11] hw/rdma: Free all receive buffers when QP
From: |
Yuval Shaia |
Subject: |
[Qemu-devel] [PATCH v6 07/11] hw/rdma: Free all receive buffers when QP is destroyed |
Date: |
Mon, 11 Mar 2019 03:29:11 -0700 |
When QP is destroyed the backend QP is destroyed as well. This ensures
we clean all received buffer we posted to it.
However, a contexts of these buffers are still remain in the device.
Fix it by maintaining a list of buffer's context and free them when QP
is destroyed.
Signed-off-by: Yuval Shaia <address@hidden>
Reviewed-by: Marcel Apfelbaum <address@hidden>
---
hw/rdma/rdma_backend.c | 26 ++++++++++++++++++++------
hw/rdma/rdma_backend.h | 2 +-
hw/rdma/rdma_backend_defs.h | 2 +-
hw/rdma/rdma_rm.c | 2 +-
hw/rdma/rdma_utils.c | 29 +++++++++++++++++++++++++++++
hw/rdma/rdma_utils.h | 11 +++++++++++
6 files changed, 63 insertions(+), 9 deletions(-)
diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c
index d0bbe57..e124d8d 100644
--- a/hw/rdma/rdma_backend.c
+++ b/hw/rdma/rdma_backend.c
@@ -39,6 +39,7 @@
typedef struct BackendCtx {
void *up_ctx;
struct ibv_sge sge; /* Used to save MAD recv buffer */
+ RdmaBackendQP *backend_qp; /* To maintain recv buffers */
} BackendCtx;
struct backend_umad {
@@ -73,6 +74,7 @@ static void free_cqe_ctx(gpointer data, gpointer user_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);
}
@@ -85,13 +87,15 @@ static void clean_recv_mads(RdmaBackendDev *backend_dev)
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)
+static int rdma_poll_cq(RdmaBackendDev *backend_dev,
+ RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq)
{
int i, ne, total_ne = 0;
BackendCtx *bctx;
@@ -113,6 +117,8 @@ static int rdma_poll_cq(RdmaDeviceResources *rdma_dev_res,
struct ibv_cq *ibcq)
comp_handler(bctx->up_ctx, &wc[i]);
+ rdma_protected_gslist_remove_int32(&bctx->backend_qp->cqe_ctx_list,
+ wc[i].wr_id);
rdma_rm_dealloc_cqe_ctx(rdma_dev_res, wc[i].wr_id);
g_free(bctx);
}
@@ -175,14 +181,12 @@ static void *comp_handler_thread(void *arg)
}
backend_dev->rdma_dev_res->stats.poll_cq_from_bk++;
- rdma_poll_cq(backend_dev->rdma_dev_res, ev_cq);
+ rdma_poll_cq(backend_dev, backend_dev->rdma_dev_res, ev_cq);
ibv_ack_cq_events(ev_cq, 1);
}
}
- /* TODO: Post cqe for all remaining buffs that were posted */
-
backend_dev->comp_thread.is_running = false;
qemu_thread_exit(0);
@@ -311,7 +315,7 @@ void rdma_backend_poll_cq(RdmaDeviceResources
*rdma_dev_res, RdmaBackendCQ *cq)
int polled;
rdma_dev_res->stats.poll_cq_from_guest++;
- polled = rdma_poll_cq(rdma_dev_res, cq->ibcq);
+ polled = rdma_poll_cq(cq->backend_dev, rdma_dev_res, cq->ibcq);
if (!polled) {
rdma_dev_res->stats.poll_cq_from_guest_empty++;
}
@@ -501,6 +505,7 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev,
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)) {
@@ -508,6 +513,8 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev,
goto err_free_bctx;
}
+ rdma_protected_gslist_append_int32(&qp->cqe_ctx_list, bctx_id);
+
rc = build_host_sge_array(backend_dev->rdma_dev_res, new_sge, sge, num_sge,
&backend_dev->rdma_dev_res->stats.tx_len);
if (rc) {
@@ -616,6 +623,7 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
bctx = g_malloc0(sizeof(*bctx));
bctx->up_ctx = ctx;
+ bctx->backend_qp = qp;
rc = rdma_rm_alloc_cqe_ctx(rdma_dev_res, &bctx_id, bctx);
if (unlikely(rc)) {
@@ -623,6 +631,8 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
goto err_free_bctx;
}
+ rdma_protected_gslist_append_int32(&qp->cqe_ctx_list, bctx_id);
+
rc = build_host_sge_array(rdma_dev_res, new_sge, sge, num_sge,
&backend_dev->rdma_dev_res->stats.rx_bufs_len);
if (rc) {
@@ -762,6 +772,8 @@ int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t
qp_type,
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 */
@@ -919,11 +931,13 @@ int rdma_backend_query_qp(RdmaBackendQP *qp, struct
ibv_qp_attr *attr,
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);
}
#define CHK_ATTR(req, dev, member, fmt) ({ \
diff --git a/hw/rdma/rdma_backend.h b/hw/rdma/rdma_backend.h
index 8e53a72..c54eaf2 100644
--- a/hw/rdma/rdma_backend.h
+++ b/hw/rdma/rdma_backend.h
@@ -102,7 +102,7 @@ int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t
qp_type,
uint32_t sq_psn, uint32_t qkey, bool use_qkey);
int rdma_backend_query_qp(RdmaBackendQP *qp, struct ibv_qp_attr *attr,
int attr_mask, struct ibv_qp_init_attr *init_attr);
-void rdma_backend_destroy_qp(RdmaBackendQP *qp);
+void rdma_backend_destroy_qp(RdmaBackendQP *qp, RdmaDeviceResources *dev_res);
void rdma_backend_post_send(RdmaBackendDev *backend_dev,
RdmaBackendQP *qp, uint8_t qp_type,
diff --git a/hw/rdma/rdma_backend_defs.h b/hw/rdma/rdma_backend_defs.h
index a8c15b0..817153d 100644
--- a/hw/rdma/rdma_backend_defs.h
+++ b/hw/rdma/rdma_backend_defs.h
@@ -26,7 +26,6 @@ typedef struct RdmaDeviceResources RdmaDeviceResources;
typedef struct RdmaBackendThread {
QemuThread thread;
- QemuMutex mutex;
bool run; /* Set by thread manager to let thread know it should exit */
bool is_running; /* Set by the thread to report its status */
} RdmaBackendThread;
@@ -66,6 +65,7 @@ typedef struct RdmaBackendQP {
struct ibv_pd *ibpd;
struct ibv_qp *ibqp;
uint8_t sgid_idx;
+ RdmaProtectedGSList cqe_ctx_list;
} RdmaBackendQP;
#endif
diff --git a/hw/rdma/rdma_rm.c b/hw/rdma/rdma_rm.c
index b50e192..bac3b2f 100644
--- a/hw/rdma/rdma_rm.c
+++ b/hw/rdma/rdma_rm.c
@@ -537,7 +537,7 @@ void rdma_rm_dealloc_qp(RdmaDeviceResources *dev_res,
uint32_t qp_handle)
return;
}
- rdma_backend_destroy_qp(&qp->backend_qp);
+ rdma_backend_destroy_qp(&qp->backend_qp, dev_res);
rdma_res_tbl_dealloc(&dev_res->qp_tbl, qp->qpn);
}
diff --git a/hw/rdma/rdma_utils.c b/hw/rdma/rdma_utils.c
index 0a8abe5..73f2791 100644
--- a/hw/rdma/rdma_utils.c
+++ b/hw/rdma/rdma_utils.c
@@ -90,3 +90,32 @@ int64_t rdma_protected_qlist_pop_int64(RdmaProtectedQList
*list)
return qnum_get_uint(qobject_to(QNum, obj));
}
+
+void rdma_protected_gslist_init(RdmaProtectedGSList *list)
+{
+ qemu_mutex_init(&list->lock);
+}
+
+void rdma_protected_gslist_destroy(RdmaProtectedGSList *list)
+{
+ if (list->list) {
+ g_slist_free(list->list);
+ list->list = NULL;
+ }
+}
+
+void rdma_protected_gslist_append_int32(RdmaProtectedGSList *list,
+ int32_t value)
+{
+ qemu_mutex_lock(&list->lock);
+ list->list = g_slist_prepend(list->list, GINT_TO_POINTER(value));
+ qemu_mutex_unlock(&list->lock);
+}
+
+void rdma_protected_gslist_remove_int32(RdmaProtectedGSList *list,
+ int32_t value)
+{
+ qemu_mutex_lock(&list->lock);
+ list->list = g_slist_remove(list->list, GINT_TO_POINTER(value));
+ qemu_mutex_unlock(&list->lock);
+}
diff --git a/hw/rdma/rdma_utils.h b/hw/rdma/rdma_utils.h
index a8bf1d4..2d42249 100644
--- a/hw/rdma/rdma_utils.h
+++ b/hw/rdma/rdma_utils.h
@@ -34,12 +34,23 @@ typedef struct RdmaProtectedQList {
QList *list;
} RdmaProtectedQList;
+typedef struct RdmaProtectedGSList {
+ QemuMutex lock;
+ GSList *list;
+} RdmaProtectedGSList;
+
void *rdma_pci_dma_map(PCIDevice *dev, dma_addr_t addr, dma_addr_t plen);
void rdma_pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len);
void rdma_protected_qlist_init(RdmaProtectedQList *list);
void rdma_protected_qlist_destroy(RdmaProtectedQList *list);
void rdma_protected_qlist_append_int64(RdmaProtectedQList *list, int64_t
value);
int64_t rdma_protected_qlist_pop_int64(RdmaProtectedQList *list);
+void rdma_protected_gslist_init(RdmaProtectedGSList *list);
+void rdma_protected_gslist_destroy(RdmaProtectedGSList *list);
+void rdma_protected_gslist_append_int32(RdmaProtectedGSList *list,
+ int32_t value);
+void rdma_protected_gslist_remove_int32(RdmaProtectedGSList *list,
+ int32_t value);
static inline void addrconf_addr_eui48(uint8_t *eui, const char *addr)
{
--
1.8.3.1
- [Qemu-devel] [PATCH v6 00/11] Misc fixes to pvrdma device, Yuval Shaia, 2019/03/11
- [Qemu-devel] [PATCH v6 09/11] hw/pvrdma: Delete pvrdma_exit function, Yuval Shaia, 2019/03/11
- [Qemu-devel] [PATCH v6 02/11] hw/rdma: Introduce protected qlist, Yuval Shaia, 2019/03/11
- [Qemu-devel] [PATCH v6 07/11] hw/rdma: Free all receive buffers when QP is destroyed,
Yuval Shaia <=
- [Qemu-devel] [PATCH v6 03/11] hw/rdma: Protect against concurrent execution of poll_cq, Yuval Shaia, 2019/03/11
- [Qemu-devel] [PATCH v6 05/11] {hmp, hw/pvrdma}: Expose device internals via monitor interface, Yuval Shaia, 2019/03/11
- [Qemu-devel] [PATCH v6 08/11] hw/pvrdma: Delete unneeded function argument, Yuval Shaia, 2019/03/11
- [Qemu-devel] [PATCH v6 04/11] hw/pvrdma: Collect debugging statistics, Yuval Shaia, 2019/03/11
- [Qemu-devel] [PATCH v6 10/11] hw/pvrdma: Unregister from shutdown notifier when device goes down, Yuval Shaia, 2019/03/11