[PATCH for-next v2 7/7] RDMA/bnxt_re: Add a new uapi for driver notification

[Selvin Xavier <selvin.xavier@broadcom.com>]

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From: Chandramohan Akula <chandramohan.akula@broadcom.com>

Add driver notify uapi for application notifying
the driver about the doorbell FIFO congestion.

Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/hw/bnxt_re/ib_verbs.c | 15 +++++++++++++++
 include/uapi/rdma/bnxt_re-abi.h          |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 8238c4b..452fbbc 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -4182,6 +4182,15 @@ void bnxt_re_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
 	kfree(bnxt_entry);
 }
 
+static int UVERBS_HANDLER(BNXT_RE_METHOD_NOTIFY_DRV)(struct uverbs_attr_bundle *attrs)
+{
+	struct bnxt_re_ucontext *uctx;
+
+	uctx = container_of(ib_uverbs_get_ucontext(attrs), struct bnxt_re_ucontext, ib_uctx);
+	bnxt_re_pacing_alert(uctx->rdev);
+	return 0;
+}
+
 static int UVERBS_HANDLER(BNXT_RE_METHOD_ALLOC_PAGE)(struct uverbs_attr_bundle *attrs)
 {
 	struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs, BNXT_RE_ALLOC_PAGE_HANDLE);
@@ -4319,7 +4328,13 @@ DECLARE_UVERBS_NAMED_OBJECT(BNXT_RE_OBJECT_ALLOC_PAGE,
 			    &UVERBS_METHOD(BNXT_RE_METHOD_ALLOC_PAGE),
 			    &UVERBS_METHOD(BNXT_RE_METHOD_DESTROY_PAGE));
 
+DECLARE_UVERBS_NAMED_METHOD(BNXT_RE_METHOD_NOTIFY_DRV);
+
+DECLARE_UVERBS_GLOBAL_METHODS(BNXT_RE_OBJECT_NOTIFY_DRV,
+			      &UVERBS_METHOD(BNXT_RE_METHOD_NOTIFY_DRV));
+
 const struct uapi_definition bnxt_re_uapi_defs[] = {
 	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(BNXT_RE_OBJECT_ALLOC_PAGE),
+	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(BNXT_RE_OBJECT_NOTIFY_DRV),
 	{}
 };
diff --git a/include/uapi/rdma/bnxt_re-abi.h b/include/uapi/rdma/bnxt_re-abi.h
index 78a324f..6e7c67a 100644
--- a/include/uapi/rdma/bnxt_re-abi.h
+++ b/include/uapi/rdma/bnxt_re-abi.h
@@ -132,6 +132,7 @@ enum bnxt_re_shpg_offt {
 
 enum bnxt_re_objects {
 	BNXT_RE_OBJECT_ALLOC_PAGE = (1U << UVERBS_ID_NS_SHIFT),
+	BNXT_RE_OBJECT_NOTIFY_DRV,
 };
 
 enum bnxt_re_alloc_page_type {
@@ -157,4 +158,7 @@ enum bnxt_re_alloc_page_methods {
 	BNXT_RE_METHOD_DESTROY_PAGE,
 };
 
+enum bnxt_re_notify_drv_methods {
+	BNXT_RE_METHOD_NOTIFY_DRV = (1U << UVERBS_ID_NS_SHIFT),
+};
 #endif /* __BNXT_RE_UVERBS_ABI_H__*/
-- 
2.5.5


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