bnxt_en: support hwrm_func_drv_unrgtr command

During remove_one, the driver should issue hwrm_func_drv_unrgtr
command to inform firmware that this function has been unloaded.
This is to let firmware keep track of driver present/absent state
when driver is gracefully unloaded. A keep alive timer is needed
later to keep track of driver state during abnormal shutdown.

Signed-off-by: Jeffrey Huang <huangjw@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 443ef92..8d401e8 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2710,6 +2710,14 @@ static int bnxt_hwrm_func_drv_rgtr(struct bnxt *bp)
        return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }
 
+static int bnxt_hwrm_func_drv_unrgtr(struct bnxt *bp)
+{
+       struct hwrm_func_drv_unrgtr_input req = {0};
+
+       bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_DRV_UNRGTR, -1, -1);
+       return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+}
+
 static int bnxt_hwrm_tunnel_dst_port_free(struct bnxt *bp, u8 tunnel_type)
 {
        u32 rc = 0;
@@ -5549,6 +5557,7 @@ static void bnxt_remove_one(struct pci_dev *pdev)
        cancel_work_sync(&bp->sp_task);
        bp->sp_event = 0;
 
+       bnxt_hwrm_func_drv_unrgtr(bp);
        bnxt_free_hwrm_resources(bp);
        pci_iounmap(pdev, bp->bar2);
        pci_iounmap(pdev, bp->bar1);