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IB/mlx5: Refactor UMR to have its own context struct

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Instead of having the UMR context part of each memory region, allocate
a struct on the stack.  This allows queuing multiple UMRs that access
the same memory region.

Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Shachar Raindel 2014-05-22 14:50:12 +03:00 committed by Roland Dreier
parent 48fea837bb
commit a74d24168d
2 changed files with 31 additions and 22 deletions
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13
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -264,8 +264,6 @@ struct mlx5_ib_mr {
__be64 *pas;
dma_addr_t dma;
int npages;
struct completion done;
enum ib_wc_status status;
struct mlx5_ib_dev *dev;
struct mlx5_create_mkey_mbox_out out;
struct mlx5_core_sig_ctx *sig;
@ -277,6 +275,17 @@ struct mlx5_ib_fast_reg_page_list {
dma_addr_t map;
};
struct mlx5_ib_umr_context {
enum ib_wc_status status;
struct completion done;
};
static inline void mlx5_ib_init_umr_context(struct mlx5_ib_umr_context *context)
{
context->status = -1;
init_completion(&context->done);
}
struct umr_common {
struct ib_pd *pd;
struct ib_cq *cq;

40
drivers/infiniband/hw/mlx5/mr.c
View File

@ -708,7 +708,7 @@ static void prep_umr_unreg_wqe(struct mlx5_ib_dev *dev,
void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context)
{
struct mlx5_ib_mr *mr;
struct mlx5_ib_umr_context *context;
struct ib_wc wc;
int err;
@ -721,9 +721,9 @@ void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context)
if (err == 0)
break;
mr = (struct mlx5_ib_mr *)(unsigned long)wc.wr_id;
mr->status = wc.status;
complete(&mr->done);
context = (struct mlx5_ib_umr_context *)wc.wr_id;
context->status = wc.status;
complete(&context->done);
}
ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
}
@ -735,6 +735,7 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct device *ddev = dev->ib_dev.dma_device;
struct umr_common *umrc = &dev->umrc;
struct mlx5_ib_umr_context umr_context;
struct ib_send_wr wr, *bad;
struct mlx5_ib_mr *mr;
struct ib_sge sg;
@ -774,24 +775,21 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
}
memset(&wr, 0, sizeof(wr));
wr.wr_id = (u64)(unsigned long)mr;
wr.wr_id = (u64)(unsigned long)&umr_context;
prep_umr_reg_wqe(pd, &wr, &sg, mr->dma, npages, mr->mmr.key, page_shift, virt_addr, len, access_flags);
/* We serialize polls so one process does not kidnap another's
* completion. This is not a problem since wr is completed in
* around 1 usec
*/
mlx5_ib_init_umr_context(&umr_context);
down(&umrc->sem);
init_completion(&mr->done);
err = ib_post_send(umrc->qp, &wr, &bad);
if (err) {
mlx5_ib_warn(dev, "post send failed, err %d\n", err);
goto unmap_dma;
}
wait_for_completion(&mr->done);
if (mr->status != IB_WC_SUCCESS) {
mlx5_ib_warn(dev, "reg umr failed\n");
err = -EFAULT;
} else {
wait_for_completion(&umr_context.done);
if (umr_context.status != IB_WC_SUCCESS) {
mlx5_ib_warn(dev, "reg umr failed\n");
err = -EFAULT;
}
}
mr->mmr.iova = virt_addr;
@ -940,24 +938,26 @@ error:
static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
{
struct umr_common *umrc = &dev->umrc;
struct mlx5_ib_umr_context umr_context;
struct ib_send_wr wr, *bad;
int err;
memset(&wr, 0, sizeof(wr));
wr.wr_id = (u64)(unsigned long)mr;
wr.wr_id = (u64)(unsigned long)&umr_context;
prep_umr_unreg_wqe(dev, &wr, mr->mmr.key);
mlx5_ib_init_umr_context(&umr_context);
down(&umrc->sem);
init_completion(&mr->done);
err = ib_post_send(umrc->qp, &wr, &bad);
if (err) {
up(&umrc->sem);
mlx5_ib_dbg(dev, "err %d\n", err);
goto error;
} else {
wait_for_completion(&umr_context.done);
up(&umrc->sem);
}
wait_for_completion(&mr->done);
up(&umrc->sem);
if (mr->status != IB_WC_SUCCESS) {
if (umr_context.status != IB_WC_SUCCESS) {
mlx5_ib_warn(dev, "unreg umr failed\n");
err = -EFAULT;
goto error;