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author | Sagi Grimberg <sagig@mellanox.com> | 2014-02-23 12:19:04 (GMT) |
---|---|---|
committer | Roland Dreier <roland@purestorage.com> | 2014-03-07 19:26:49 (GMT) |
commit | 17cd3a2db825506c3e3bb9548ad20f67e2f8d0e7 (patch) | |
tree | 907165457888d6c3ecf54247b736ca17bd894b20 /include | |
parent | eeb8461e36c99fdf2d058751be924a2aab215005 (diff) | |
download | linux-17cd3a2db825506c3e3bb9548ad20f67e2f8d0e7.tar.xz |
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')
-rw-r--r-- | include/rdma/ib_verbs.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 6793f32..cb12e6a 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. |