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authorGal Pressman <galpress@amazon.com>2018-12-12 11:09:05 +0200
committerJason Gunthorpe <jgg@mellanox.com>2018-12-19 16:17:19 -0700
commitb090c4e3a07c33ffdf95fb7601551b38fc2a4bbb (patch)
tree0704aa8ff0477e5847ceb00dceac988f206ca3b0 /drivers/infiniband/core/verbs.c
parentRDMA/srpt: Add support for immediate data (diff)
downloadlinux-dev-b090c4e3a07c33ffdf95fb7601551b38fc2a4bbb.tar.xz
linux-dev-b090c4e3a07c33ffdf95fb7601551b38fc2a4bbb.zip
RDMA: Mark if create address handle is in a sleepable context
Introduce a 'flags' field to create address handle callback and add a flag that marks whether the callback is executed in an atomic context or not. This will allow drivers to wait for completion instead of polling for it when it is allowed. Signed-off-by: Gal Pressman <galpress@amazon.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/verbs.c')
-rw-r--r--drivers/infiniband/core/verbs.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index bc0b3a150e3c..4e2df239447e 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -487,14 +487,17 @@ rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr,
static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
struct rdma_ah_attr *ah_attr,
+ u32 flags,
struct ib_udata *udata)
{
struct ib_ah *ah;
+ might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE);
+
if (!pd->device->ops.create_ah)
return ERR_PTR(-EOPNOTSUPP);
- ah = pd->device->ops.create_ah(pd, ah_attr, udata);
+ ah = pd->device->ops.create_ah(pd, ah_attr, flags, udata);
if (!IS_ERR(ah)) {
ah->device = pd->device;
@@ -514,12 +517,14 @@ static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
* given address vector.
* @pd: The protection domain associated with the address handle.
* @ah_attr: The attributes of the address vector.
+ * @flags: Create address handle flags (see enum rdma_create_ah_flags).
*
* It returns 0 on success and returns appropriate error code on error.
* The address handle is used to reference a local or global destination
* in all UD QP post sends.
*/
-struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr)
+struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
+ u32 flags)
{
const struct ib_gid_attr *old_sgid_attr;
struct ib_ah *ah;
@@ -529,7 +534,7 @@ struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr)
if (ret)
return ERR_PTR(ret);
- ah = _rdma_create_ah(pd, ah_attr, NULL);
+ ah = _rdma_create_ah(pd, ah_attr, flags, NULL);
rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
return ah;
@@ -569,7 +574,7 @@ struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
}
}
- ah = _rdma_create_ah(pd, ah_attr, udata);
+ ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE, udata);
out:
rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
@@ -881,7 +886,7 @@ struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
if (ret)
return ERR_PTR(ret);
- ah = rdma_create_ah(pd, &ah_attr);
+ ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE);
rdma_destroy_ah_attr(&ah_attr);
return ah;