This commit introduces verbs for creating memory regions
which will allow new types of memory key operations such
as indirect memory registration and 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 that will describe protection
schemes that will be enforced by the HCA in an offloaded manner.
In the future these routines may replace 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 <sa...@mellanox.com>
---
drivers/infiniband/core/verbs.c | 39 +++++++++++++++++++++++++++++++++
include/rdma/ib_verbs.h | 46 +++++++++++++++++++++++++++++++++++++++
2 files changed, 85 insertions(+), 0 deletions(-)
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 22192de..1d94a5c 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1052,6 +1052,45 @@ 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;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 645c3ce..65b7e79 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -925,6 +925,30 @@ enum ib_mr_rereg_flags {
IB_MR_REREG_ACCESS = (1<<2)
};
+enum ib_mr_create_flags {
+ IB_MR_SIGNATURE_EN = 1,
+};
+
+enum ib_mr_reg_type {
+ IB_MR_REG_DIRECT,
+ IB_MR_REG_INDIRECT,
+};
+
+/**
+ * ib_mr_init_attr - Memory region init attributes passed to routine
+ * ib_create_mr.
+ * @reg_type: requested mapping type, this can be direct/indirect
+ * registration or repetitive structure registration.
+ * @max_reg_descriptors: max number of registration units that
+ * may be used with UMR work requests.
+ * @flags: MR creation flags bit mask.
+ */
+struct ib_mr_init_attr {
+ enum ib_mr_reg_type reg_type;
+ int max_reg_descriptors;
+ enum ib_mr_create_flags flags;
+};
+
/**
* struct ib_mw_bind - Parameters for a type 1 memory window bind operation.
* @wr_id: Work request id.
@@ -1257,6 +1281,9 @@ struct ib_device {
int (*query_mr)(struct ib_mr *mr,
struct ib_mr_attr *mr_attr);
int (*dereg_mr)(struct ib_mr *mr);
+ int (*destroy_mr)(struct ib_mr *mr);
+ struct ib_mr * (*create_mr)(struct ib_pd *pd,
+ struct ib_mr_init_attr
*mr_init_attr);
struct ib_mr * (*alloc_fast_reg_mr)(struct ib_pd *pd,
int max_page_list_len);
struct ib_fast_reg_page_list * (*alloc_fast_reg_page_list)(struct
ib_device *device,
@@ -2092,6 +2119,25 @@ int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr
*mr_attr);
*/
int ib_dereg_mr(struct ib_mr *mr);
+
+/**
+ * ib_create_mr - creates memory region that may be used for
+ * direct or indirect registration models via UMR WR.
+ * @pd: The protection domain associated with the region.
+ * @mr_init_attr: memory region init attributes.
+ */
+struct ib_mr *ib_create_mr(struct ib_pd *pd,
+ struct ib_mr_init_attr *mr_init_attr);
+
+/**
+ * ib_destroy_mr - Destroys a memory region that was created using
+ * ib_create_mr and removes it from HW translation tables.
+ * @mr: The memory region to destroy.
+ *
+ * This function can fail, if the memory region has memory windows bound to it.
+ */
+int ib_destroy_mr(struct ib_mr *mr);
+
/**
* ib_alloc_fast_reg_mr - Allocates memory region usable with the
* IB_WR_FAST_REG_MR send work request.
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
