be2net: receive asynchronous link status notifications from BE

Rcv and process ansync link status notifications from BE instead of polling
 for link status in the be_worker thread.

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 29 insertions, 7 deletions

diff --git a/drivers/net/benet/be_cmds.h b/drivers/net/benet/be_cmds.h
index a567aa437ec9..747626da7b4e 100644
--- a/drivers/net/benet/be_cmds.h
+++ b/drivers/net/benet/be_cmds.h
@@ -76,6 +76,34 @@ struct be_mcc_cq_entry {
         u32 flags;              /* dword 3 */
 };
 
+/* When the async bit of mcc_compl is set, the last 4 bytes of
+ * mcc_compl is interpreted as follows:
+ */
+#define ASYNC_TRAILER_EVENT_CODE_SHIFT  8       /* bits 8 - 15 */
+#define ASYNC_TRAILER_EVENT_CODE_MASK   0xFF
+#define ASYNC_EVENT_CODE_LINK_STATE     0x1
+struct be_async_event_trailer {
+        u32 code;
+};
+
+enum {
+        ASYNC_EVENT_LINK_DOWN   = 0x0,
+        ASYNC_EVENT_LINK_UP     = 0x1
+};
+
+/* When the event code of an async trailer is link-state, the mcc_compl
+ * must be interpreted as follows
+ */
+struct be_async_event_link_state {
+        u8 physical_port;
+        u8 port_link_status;
+        u8 port_duplex;
+        u8 port_speed;
+        u8 port_fault;
+        u8 rsvd0[7];
+        struct be_async_event_trailer trailer;
+} __packed;
+
 struct be_mcc_mailbox {
         struct be_mcc_wrb wrb;
         struct be_mcc_cq_entry cqe;
@@ -580,12 +608,6 @@ struct be_cmd_req_link_status {
         u32 rsvd;
 };
 
-struct be_link_info {
-        u8 duplex;
-        u8 speed;
-        u8 fault;
-};
-
 enum {
         PHY_LINK_DUPLEX_NONE = 0x0,
         PHY_LINK_DUPLEX_HALF = 0x1,
@@ -704,7 +726,7 @@ extern int be_cmd_rxq_create(struct be_ctrl_info *ctrl,
 extern int be_cmd_q_destroy(struct be_ctrl_info *ctrl, struct be_queue_info *q,
                         int type);
 extern int be_cmd_link_status_query(struct be_ctrl_info *ctrl,
-                        struct be_link_info *link);
+                        bool *link_up);
 extern int be_cmd_reset(struct be_ctrl_info *ctrl);
 extern int be_cmd_get_stats(struct be_ctrl_info *ctrl,
                         struct be_dma_mem *nonemb_cmd);