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authorShani Michaeli <shanim@mellanox.com>2013-02-06 20:19:15 +0400
committerRoland Dreier <roland@purestorage.com>2013-02-25 22:44:32 +0400
commit6ff63e194066a1f14aee805366a1d79c541fddae (patch)
treed619416f696cf6859587fa5875845609a9ba6a4e /drivers/infiniband
parent804d6a89a5c0b076317966bcbcd7a63d42241831 (diff)
downloadlinux-6ff63e194066a1f14aee805366a1d79c541fddae.tar.xz
IB/mlx4: Support memory window binding
* Implement memory windows binding in mlx4_ib_post_send. * Implement mlx4_ib_bind_mw by deferring to mlx4_ib_post_send. * Rename MLX4_WQE_FMR_PERM_* flags to MLX4_WQE_FMR_AND_BIND_PERM_*, indicating that they are used both for fast registration work requests, and for memory window bind work requests. Signed-off-by: Haggai Eran <haggaie@mellanox.com> Signed-off-by: Shani Michaeli <shanim@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mlx4/mlx4_ib.h2
-rw-r--r--drivers/infiniband/hw/mlx4/mr.c22
-rw-r--r--drivers/infiniband/hw/mlx4/qp.c35
3 files changed, 56 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 9ba0aaf3a58e..f61ec26500c4 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -592,6 +592,8 @@ struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
struct ib_udata *udata);
int mlx4_ib_dereg_mr(struct ib_mr *mr);
struct ib_mw *mlx4_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type);
+int mlx4_ib_bind_mw(struct ib_qp *qp, struct ib_mw *mw,
+ struct ib_mw_bind *mw_bind);
int mlx4_ib_dealloc_mw(struct ib_mw *mw);
struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
int max_page_list_len);
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index 5adf4c47ee18..e471f089ff00 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -231,6 +231,28 @@ err_free:
return ERR_PTR(err);
}
+int mlx4_ib_bind_mw(struct ib_qp *qp, struct ib_mw *mw,
+ struct ib_mw_bind *mw_bind)
+{
+ struct ib_send_wr wr;
+ struct ib_send_wr *bad_wr;
+ int ret;
+
+ memset(&wr, 0, sizeof(wr));
+ wr.opcode = IB_WR_BIND_MW;
+ wr.wr_id = mw_bind->wr_id;
+ wr.send_flags = mw_bind->send_flags;
+ wr.wr.bind_mw.mw = mw;
+ wr.wr.bind_mw.bind_info = mw_bind->bind_info;
+ wr.wr.bind_mw.rkey = ib_inc_rkey(mw->rkey);
+
+ ret = mlx4_ib_post_send(qp, &wr, &bad_wr);
+ if (!ret)
+ mw->rkey = wr.wr.bind_mw.rkey;
+
+ return ret;
+}
+
int mlx4_ib_dealloc_mw(struct ib_mw *ibmw)
{
struct mlx4_ib_mw *mw = to_mmw(ibmw);
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index ebadebe83b11..35cced2a4da8 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -104,6 +104,7 @@ static const __be32 mlx4_ib_opcode[] = {
[IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
[IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
[IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
+ [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW),
};
static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
@@ -1953,9 +1954,12 @@ static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq
static __be32 convert_access(int acc)
{
- return (acc & IB_ACCESS_REMOTE_ATOMIC ? cpu_to_be32(MLX4_WQE_FMR_PERM_ATOMIC) : 0) |
- (acc & IB_ACCESS_REMOTE_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_REMOTE_WRITE) : 0) |
- (acc & IB_ACCESS_REMOTE_READ ? cpu_to_be32(MLX4_WQE_FMR_PERM_REMOTE_READ) : 0) |
+ return (acc & IB_ACCESS_REMOTE_ATOMIC ?
+ cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
+ (acc & IB_ACCESS_REMOTE_WRITE ?
+ cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
+ (acc & IB_ACCESS_REMOTE_READ ?
+ cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
(acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
}
@@ -1981,6 +1985,24 @@ static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
fseg->reserved[1] = 0;
}
+static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
+{
+ bseg->flags1 =
+ convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
+ cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
+ MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
+ MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
+ bseg->flags2 = 0;
+ if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
+ bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
+ if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
+ bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
+ bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
+ bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
+ bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
+ bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
+}
+
static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
{
memset(iseg, 0, sizeof(*iseg));
@@ -2289,6 +2311,13 @@ int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
break;
+ case IB_WR_BIND_MW:
+ ctrl->srcrb_flags |=
+ cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
+ set_bind_seg(wqe, wr);
+ wqe += sizeof(struct mlx4_wqe_bind_seg);
+ size += sizeof(struct mlx4_wqe_bind_seg) / 16;
+ break;
default:
/* No extra segments required for sends */
break;