RDMA/bnxt_re: Add a new uapi for driver notification

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

Link: https://lore.kernel.org/r/1689742977-9128-8-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 0703163..ec4d163 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -4183,6 +4183,15 @@ 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);
@@ -4320,7 +4329,13 @@ 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 (file)
--- 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__*/