bnxt_en: Add async event handling for speed config changes.

On some dual port cards, link speeds on both ports have to be compatible.
Firmware will inform the driver when a certain speed is no longer
supported if the other port has linked up at a certain speed.  Add
logic to handle this event by logging a message and getting the
updated list of supported speeds.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index c83a5a1862d0..4645c44e7c15 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -122,6 +122,7 @@ static const u16 bnxt_async_events_arr[] = {
         HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_STATUS_CHANGE,
         HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD,
         HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PORT_CONN_NOT_ALLOWED,
+        HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_SPEED_CFG_CHANGE,
 };
 
 static bool bnxt_vf_pciid(enum board_idx idx)
@@ -1257,6 +1258,21 @@ static int bnxt_async_event_process(struct bnxt *bp,
 
         /* TODO CHIMP_FW: Define event id's for link change, error etc */
         switch (event_id) {
+        case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_SPEED_CFG_CHANGE: {
+                u32 data1 = le32_to_cpu(cmpl->event_data1);
+                struct bnxt_link_info *link_info = &bp->link_info;
+
+                if (BNXT_VF(bp))
+                        goto async_event_process_exit;
+                if (data1 & 0x20000) {
+                        u16 fw_speed = link_info->force_link_speed;
+                        u32 speed = bnxt_fw_to_ethtool_speed(fw_speed);
+
+                        netdev_warn(bp->dev, "Link speed %d no longer supported\n",
+                                    speed);
+                }
+                /* fall thru */
+        }
         case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_STATUS_CHANGE:
                 set_bit(BNXT_LINK_CHNG_SP_EVENT, &bp->sp_event);
                 break;