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IB/mlx4: Add support for XRC domains

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Support creating and destroying XRC domains.  Any sharing of the XRCD
is managed above the low-level driver.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sean Hefty
2011-06-02 09:01:33 -07:00
committed by Roland Dreier
parent 2622e18ef4
commit 012a8ff577
8 changed files with 134 additions and 1 deletions
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59
drivers/infiniband/hw/mlx4/main.c
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@@ -566,6 +566,57 @@ static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
return 0;
}
static struct ib_xrcd *mlx4_ib_alloc_xrcd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct mlx4_ib_xrcd *xrcd;
int err;
if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
return ERR_PTR(-ENOSYS);
xrcd = kmalloc(sizeof *xrcd, GFP_KERNEL);
if (!xrcd)
return ERR_PTR(-ENOMEM);
err = mlx4_xrcd_alloc(to_mdev(ibdev)->dev, &xrcd->xrcdn);
if (err)
goto err1;
xrcd->pd = ib_alloc_pd(ibdev);
if (IS_ERR(xrcd->pd)) {
err = PTR_ERR(xrcd->pd);
goto err2;
}
xrcd->cq = ib_create_cq(ibdev, NULL, NULL, xrcd, 1, 0);
if (IS_ERR(xrcd->cq)) {
err = PTR_ERR(xrcd->cq);
goto err3;
}
return &xrcd->ibxrcd;
err3:
ib_dealloc_pd(xrcd->pd);
err2:
mlx4_xrcd_free(to_mdev(ibdev)->dev, xrcd->xrcdn);
err1:
kfree(xrcd);
return ERR_PTR(err);
}
static int mlx4_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
{
ib_destroy_cq(to_mxrcd(xrcd)->cq);
ib_dealloc_pd(to_mxrcd(xrcd)->pd);
mlx4_xrcd_free(to_mdev(xrcd->device)->dev, to_mxrcd(xrcd)->xrcdn);
kfree(xrcd);
return 0;
}
static int add_gid_entry(struct ib_qp *ibqp, union ib_gid *gid)
{
struct mlx4_ib_qp *mqp = to_mqp(ibqp);
@@ -1093,6 +1144,14 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
ibdev->ib_dev.unmap_fmr = mlx4_ib_unmap_fmr;
ibdev->ib_dev.dealloc_fmr = mlx4_ib_fmr_dealloc;
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) {
ibdev->ib_dev.alloc_xrcd = mlx4_ib_alloc_xrcd;
ibdev->ib_dev.dealloc_xrcd = mlx4_ib_dealloc_xrcd;
ibdev->ib_dev.uverbs_cmd_mask |=
(1ull << IB_USER_VERBS_CMD_OPEN_XRCD) |
(1ull << IB_USER_VERBS_CMD_CLOSE_XRCD);
}
spin_lock_init(&iboe->lock);
if (init_node_data(ibdev))