IB/core: Add arbitrary sg_list support
Devices that are capable in registering SG lists
with gaps can now expose it in the core to ULPs
using a new device capability IB_DEVICE_SG_GAPS_REG
(in a new field device_cap_flags_ex in the device attributes
as we ran out of bits), and a new mr_type IB_MR_TYPE_SG_GAPS_REG
which allocates a memory region which is capable of handling
SG lists with gaps.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 3f79070..bcd5b24 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -212,6 +212,7 @@
IB_DEVICE_MANAGED_FLOW_STEERING = (1 << 29),
IB_DEVICE_SIGNATURE_HANDOVER = (1 << 30),
IB_DEVICE_ON_DEMAND_PAGING = (1 << 31),
+ IB_DEVICE_SG_GAPS_REG = (1ULL << 32),
};
enum ib_signature_prot_cap {
@@ -662,10 +663,15 @@
* @IB_MR_TYPE_SIGNATURE: memory region that is used for
* signature operations (data-integrity
* capable regions)
+ * @IB_MR_TYPE_SG_GAPS: memory region that is capable to
+ * register any arbitrary sg lists (without
+ * the normal mr constraints - see
+ * ib_map_mr_sg)
*/
enum ib_mr_type {
IB_MR_TYPE_MEM_REG,
IB_MR_TYPE_SIGNATURE,
+ IB_MR_TYPE_SG_GAPS,
};
/**