bnxt_en: Add async event handling for speed config changes.

Orabug: 23221795

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>
(cherry picked from commit 8cbde1175e3c8565edbb777cd09cbfdb93c78397)
Signed-off-by: Brian Maly <brian.maly@oracle.com>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 0ce5ec5adc0316ba9705d5ed68ec97b8b3a46ac3..b6f2c559b18eb04c7ae6b6e5ad4882a56bcc276f 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -125,6 +125,7 @@ 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)
@@ -1342,6 +1343,21 @@ 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;