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hw/rdma: Cosmetic change - no need for two sge arrays

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The function build_host_sge_array uses two sge arrays, one for input and
one for output.
Since the size of the two arrays is the same, the function can write
directly to the given source array (i.e. input/output argument).

Signed-off-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Message-Id: <20200320143429.9490-2-yuval.shaia.ml@gmail.com>
Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
This commit is contained in:
Yuval Shaia 2020-03-20 16:34:28 +02:00 committed by Marcel Apfelbaum
parent 1d2695ef02
commit f23601515b
1 changed files with 16 additions and 24 deletions
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40
hw/rdma/rdma_backend.c
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@ -378,30 +378,25 @@ static void ah_cache_init(void)
}
static int build_host_sge_array(RdmaDeviceResources *rdma_dev_res,
struct ibv_sge *dsge, struct ibv_sge *ssge,
uint8_t num_sge, uint64_t *total_length)
struct ibv_sge *sge, uint8_t num_sge,
uint64_t *total_length)
{
RdmaRmMR *mr;
int ssge_idx;
int idx;
for (ssge_idx = 0; ssge_idx < num_sge; ssge_idx++) {
mr = rdma_rm_get_mr(rdma_dev_res, ssge[ssge_idx].lkey);
for (idx = 0; idx < num_sge; idx++) {
mr = rdma_rm_get_mr(rdma_dev_res, sge[idx].lkey);
if (unlikely(!mr)) {
rdma_error_report("Invalid lkey 0x%x", ssge[ssge_idx].lkey);
return VENDOR_ERR_INVLKEY | ssge[ssge_idx].lkey;
rdma_error_report("Invalid lkey 0x%x", sge[idx].lkey);
return VENDOR_ERR_INVLKEY | sge[idx].lkey;
}
#ifdef LEGACY_RDMA_REG_MR
dsge->addr = (uintptr_t)mr->virt + ssge[ssge_idx].addr - mr->start;
#else
dsge->addr = ssge[ssge_idx].addr;
sge[idx].addr = (uintptr_t)mr->virt + sge[idx].addr - mr->start;
#endif
dsge->length = ssge[ssge_idx].length;
dsge->lkey = rdma_backend_mr_lkey(&mr->backend_mr);
sge[idx].lkey = rdma_backend_mr_lkey(&mr->backend_mr);
*total_length += dsge->length;
dsge++;
*total_length += sge[idx].length;
}
return 0;
@ -484,7 +479,6 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev,
void *ctx)
{
BackendCtx *bctx;
struct ibv_sge new_sge[MAX_SGE];
uint32_t bctx_id;
int rc;
struct ibv_send_wr wr = {}, *bad_wr;
@ -518,7 +512,7 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev,
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,
rc = build_host_sge_array(backend_dev->rdma_dev_res, sge, num_sge,
&backend_dev->rdma_dev_res->stats.tx_len);
if (rc) {
complete_work(IBV_WC_GENERAL_ERR, rc, ctx);
@ -538,7 +532,7 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev,
wr.num_sge = num_sge;
wr.opcode = IBV_WR_SEND;
wr.send_flags = IBV_SEND_SIGNALED;
wr.sg_list = new_sge;
wr.sg_list = sge;
wr.wr_id = bctx_id;
rc = ibv_post_send(qp->ibqp, &wr, &bad_wr);
@ -601,7 +595,6 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
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;
@ -635,7 +628,7 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
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,
rc = build_host_sge_array(backend_dev->rdma_dev_res, sge, num_sge,
&backend_dev->rdma_dev_res->stats.rx_bufs_len);
if (rc) {
complete_work(IBV_WC_GENERAL_ERR, rc, ctx);
@ -643,7 +636,7 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
}
wr.num_sge = num_sge;
wr.sg_list = new_sge;
wr.sg_list = sge;
wr.wr_id = bctx_id;
rc = ibv_post_recv(qp->ibqp, &wr, &bad_wr);
if (rc) {
@ -671,7 +664,6 @@ void rdma_backend_post_srq_recv(RdmaBackendDev *backend_dev,
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;
@ -688,7 +680,7 @@ void rdma_backend_post_srq_recv(RdmaBackendDev *backend_dev,
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,
rc = build_host_sge_array(backend_dev->rdma_dev_res, sge, num_sge,
&backend_dev->rdma_dev_res->stats.rx_bufs_len);
if (rc) {
complete_work(IBV_WC_GENERAL_ERR, rc, ctx);
@ -696,7 +688,7 @@ void rdma_backend_post_srq_recv(RdmaBackendDev *backend_dev,
}
wr.num_sge = num_sge;
wr.sg_list = new_sge;
wr.sg_list = sge;
wr.wr_id = bctx_id;
rc = ibv_post_srq_recv(srq->ibsrq, &wr, &bad_wr);
if (rc) {