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IB/core: Introduce protected memory regions

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This commit introduces verbs for creating/destoying memory
regions which will allow new types of memory key operations such
as protected memory registration.

Indirect memory registration is registering several (one
of more) pre-registered memory regions in a specific layout.
The Indirect region may potentialy describe several regions
and some repitition format between them.

Protected Memory registration is registering a memory region
with various data integrity attributes which will describe protection
schemes that will be handled by the HCA in an offloaded manner.
These memory regions will be applicable for a new REG_SIG_MR
work request introduced later in this patchset.

In the future these routines may replace or implement current memory
regions creation routines existing today:
- ib_reg_user_mr
- ib_alloc_fast_reg_mr
- ib_get_dma_mr
- ib_dereg_mr

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sagi Grimberg
2014-02-23 14:19:04 +02:00
committed by Roland Dreier
parent eeb8461e36
commit 17cd3a2db8
2 changed files with 77 additions and 0 deletions
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39
drivers/infiniband/core/verbs.c
View File

@@ -1169,6 +1169,45 @@ int ib_dereg_mr(struct ib_mr *mr)
}
EXPORT_SYMBOL(ib_dereg_mr);
struct ib_mr *ib_create_mr(struct ib_pd *pd,
struct ib_mr_init_attr *mr_init_attr)
{
struct ib_mr *mr;
if (!pd->device->create_mr)
return ERR_PTR(-ENOSYS);
mr = pd->device->create_mr(pd, mr_init_attr);
if (!IS_ERR(mr)) {
mr->device = pd->device;
mr->pd = pd;
mr->uobject = NULL;
atomic_inc(&pd->usecnt);
atomic_set(&mr->usecnt, 0);
}
return mr;
}
EXPORT_SYMBOL(ib_create_mr);
int ib_destroy_mr(struct ib_mr *mr)
{
struct ib_pd *pd;
int ret;
if (atomic_read(&mr->usecnt))
return -EBUSY;
pd = mr->pd;
ret = mr->device->destroy_mr(mr);
if (!ret)
atomic_dec(&pd->usecnt);
return ret;
}
EXPORT_SYMBOL(ib_destroy_mr);
struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
{
struct ib_mr *mr;