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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>
This commit is contained in:
Shani Michaeli 2013-02-06 16:19:15 +00:00 committed by Roland Dreier
parent 804d6a89a5
commit 6ff63e1940
4 changed files with 64 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/hw/mlx4/mlx4_ib.h
View File

@ -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);

22
drivers/infiniband/hw/mlx4/mr.c
View File

@ -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);

35
drivers/infiniband/hw/mlx4/qp.c
View File

@ -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;

11
include/linux/mlx4/qp.h
View File

@ -265,6 +265,11 @@ struct mlx4_wqe_lso_seg {
__be32 header[0];
};
enum mlx4_wqe_bind_seg_flags2 {
MLX4_WQE_BIND_ZERO_BASED = (1 << 30),
MLX4_WQE_BIND_TYPE_2 = (1 << 31),
};
struct mlx4_wqe_bind_seg {
__be32 flags1;
__be32 flags2;
@ -277,9 +282,9 @@ struct mlx4_wqe_bind_seg {
enum {
MLX4_WQE_FMR_PERM_LOCAL_READ = 1 << 27,
MLX4_WQE_FMR_PERM_LOCAL_WRITE = 1 << 28,
MLX4_WQE_FMR_PERM_REMOTE_READ = 1 << 29,
MLX4_WQE_FMR_PERM_REMOTE_WRITE = 1 << 30,
MLX4_WQE_FMR_PERM_ATOMIC = 1 << 31
MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ = 1 << 29,
MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE = 1 << 30,
MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC = 1 << 31
};
struct mlx4_wqe_fmr_seg {