On 8/30/2015 6:31 PM, Sagi Grimberg wrote:
- patch 2 now explicitly replaces the weird overloading in the mlx5
driver with an explicit embedding of struct ib_send_wr, similar
to what we do for all other MRs.
That's nice,
There is one non-trivial spot that was missed in mlx5_ib_post_send
though:
diff --git a/drivers/infiniband/hw/mlx5/qp.c
b/drivers/infiniband/hw/mlx5/qp.c
index 7ddfb74..35a18d6 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -2802,7 +2802,7 @@ int mlx5_ib_post_send(struct ib_qp *ibqp, struct
ib_send_wr *wr,
goto out;
}
qp->sq.wr_data[idx] = MLX5_IB_WR_UMR;
- ctrl->imm = cpu_to_be32(fast_reg_wr(wr)->rkey);
+ ctrl->imm = cpu_to_be32(umr_wr(wr)->mkey);
set_reg_umr_segment(seg, wr);
seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
Care to fold this in?
There is another problem I'm seeing in this patch. in reg_umr the
local variable is a type ib_send_wr which is passed to
prep_umr_reg_wqe() which casts it to mlx5_umr_wr (container_of). It
should have probably been mlx5_umr_wr to begin with...
I think this needs to be folded in as well:
diff --git a/drivers/infiniband/hw/mlx5/mr.c
b/drivers/infiniband/hw/mlx5/mr.c
index 9fac2c1..6f8f3d8 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -752,7 +752,8 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd,
struct ib_umem *umem,
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_umr_wr umrwr;
+ struct ib_send_wr *bad;
struct mlx5_ib_mr *mr;
struct ib_sge sg;
int size;
@@ -798,14 +799,14 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd
*pd, struct ib_umem *umem,
goto free_pas;
}
- memset(&wr, 0, sizeof(wr));
- wr.wr_id = (u64)(unsigned long)&umr_context;
- prep_umr_reg_wqe(pd, &wr, &sg, dma, npages, mr->mmr.key, page_shift,
- virt_addr, len, access_flags);
+ memset(&umrwr, 0, sizeof(umrwr));
+ umrwr.wr.wr_id = (u64)(unsigned long)&umr_context;
+ prep_umr_reg_wqe(pd, &umrwr.wr, &sg, dma, npages, mr->mmr.key,
+ page_shift, virt_addr, len, access_flags);
mlx5_ib_init_umr_context(&umr_context);
down(&umrc->sem);
- err = ib_post_send(umrc->qp, &wr, &bad);
+ err = ib_post_send(umrc->qp, &umrwr.wr, &bad);
if (err) {
mlx5_ib_warn(dev, "post send failed, err %d\n", err);
goto unmap_dma;
@@ -1134,16 +1135,17 @@ 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;
+ struct mlx5_umr_wr umrwr;
+ struct ib_send_wr *bad;
int err;
- memset(&wr, 0, sizeof(wr));
- wr.wr_id = (u64)(unsigned long)&umr_context;
- prep_umr_unreg_wqe(dev, &wr, mr->mmr.key);
+ memset(&umrwr, 0, sizeof(umrwr));
+ umrwr.wr.wr_id = (u64)(unsigned long)&umr_context;
+ prep_umr_unreg_wqe(dev, &umrwr.wr, mr->mmr.key);
mlx5_ib_init_umr_context(&umr_context);
down(&umrc->sem);
- err = ib_post_send(umrc->qp, &wr, &bad);
+ err = ib_post_send(umrc->qp, &umrwr.wr, &bad);
if (err) {
up(&umrc->sem);
mlx5_ib_dbg(dev, "err %d\n", err);
--
--
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