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RDMA: Mark if create address handle is in a sleepable context

Bladeren bron 
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>
This commit is contained in:
Gal Pressman
2018-12-12 11:09:05 +02:00
gecommit door Jason Gunthorpe
bovenliggende 5dabcd0456
commit b090c4e3a0
30 gewijzigde bestanden met toevoegingen van 52 en 27 verwijderingen
Download Patch-bestand Download Diff-bestand Expand all files Collapse all files

2
drivers/infiniband/core/cm.c
Bestand weergeven

@@ -343,7 +343,7 @@ static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
ret = -ENODEV;
goto out;
}
ah = rdma_create_ah(mad_agent->qp->pd, &av->ah_attr);
ah = rdma_create_ah(mad_agent->qp->pd, &av->ah_attr, 0);
if (IS_ERR(ah)) {
ret = PTR_ERR(ah);
goto out;

3
drivers/infiniband/core/sa_query.c
Bestand weergeven

@@ -2276,7 +2276,8 @@ static void update_sm_ah(struct work_struct *work)
cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
}
new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr,
RDMA_CREATE_AH_SLEEPABLE);
if (IS_ERR(new_ah->ah)) {
pr_warn("Couldn't create new SM AH\n");
kfree(new_ah);

15
drivers/infiniband/core/verbs.c
Bestand weergeven

@@ -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;