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authorSagi Grimberg <sagig@mellanox.com>2014-02-23 14:19:04 +0200
committerRoland Dreier <roland@purestorage.com>2014-03-07 11:26:49 -0800
commit17cd3a2db825506c3e3bb9548ad20f67e2f8d0e7 (patch)
tree907165457888d6c3ecf54247b736ca17bd894b20 /include/rdma
parenteeb8461e36c99fdf2d058751be924a2aab215005 (diff)
downloadlinux-linaro-stable-17cd3a2db825506c3e3bb9548ad20f67e2f8d0e7.tar.gz
IB/core: Introduce protected memory regions
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>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 6793f32ccb58..cb12e6a4e553 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -461,6 +461,22 @@ int ib_rate_to_mult(enum ib_rate rate) __attribute_const__;
*/
int ib_rate_to_mbps(enum ib_rate rate) __attribute_const__;
+enum ib_mr_create_flags {
+ IB_MR_SIGNATURE_EN = 1,
+};
+
+/**
+ * ib_mr_init_attr - Memory region init attributes passed to routine
+ * ib_create_mr.
+ * @max_reg_descriptors: max number of registration descriptors that
+ * may be used with registration work requests.
+ * @flags: MR creation flags bit mask.
+ */
+struct ib_mr_init_attr {
+ int max_reg_descriptors;
+ u32 flags;
+};
+
/**
* mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
* enum.
@@ -1407,6 +1423,9 @@ 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,
@@ -2250,6 +2269,25 @@ 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 - Allocates a memory region that may be used for
+ * signature handover operations.
+ * @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.