IB/uverbs: Add alloc/free dm uverbs ioctl support
This change adds uverbs support for allocation/freeing
of device memory commands.
A new uverbs object is defined of type idr to represent
and track the new resource type allocation per context.
The API requires provider driver to implement 2 new ib_device
callbacks - one for allocation and one for deallocation which
return and accept (respectively) the ib_dm object which represents
the allocated memory on the device.
The support is added via the ioctl command infrastructure
only.
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index ed42562..6806c4f 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -321,6 +321,12 @@ struct ib_cq_caps {
u16 max_cq_moderation_period;
};
+struct ib_dm_alloc_attr {
+ u64 length;
+ u32 alignment;
+ u32 flags;
+};
+
struct ib_device_attr {
u64 fw_ver;
__be64 sys_image_guid;
@@ -1769,6 +1775,14 @@ struct ib_qp {
struct rdma_restrack_entry res;
};
+struct ib_dm {
+ struct ib_device *device;
+ u32 length;
+ u32 flags;
+ struct ib_uobject *uobject;
+ atomic_t usecnt;
+};
+
struct ib_mr {
struct ib_device *device;
struct ib_pd *pd;
@@ -2425,7 +2439,11 @@ struct ib_device {
int (*modify_flow_action_esp)(struct ib_flow_action *action,
const struct ib_flow_action_attrs_esp *attr,
struct uverbs_attr_bundle *attrs);
-
+ struct ib_dm * (*alloc_dm)(struct ib_device *device,
+ struct ib_ucontext *context,
+ struct ib_dm_alloc_attr *attr,
+ struct uverbs_attr_bundle *attrs);
+ int (*dealloc_dm)(struct ib_dm *dm);
/**
* rdma netdev operation
*