bnxt_en: Reset embedded processor after applying firmware upgrade

Use HWRM_FW_RESET command to request a self-reset of the embedded
processor(s) after successfully applying a firmware update. For boot
processor, the self-reset is currently deferred until the next PCIe reset.

upstream-status: backport

Notice: We change the Signed-off-by to "Signed -of -by" to avoid trigger
the spam to the original author.

Signed -of -by: Rob Swindell <swindell@broadcom.com>
Signed -of -by: Michael Chan <mchan@broadcom.com>
Signed -of -by: David S. Miller <davem@davemloft.net>

Change-Id: Ic491d584c566b89a315d04f41b1d4fa928756403
Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>

diff --git a/kernel/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/kernel/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 45bd628..e33b6d6 100644 (file)
--- a/kernel/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/kernel/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -802,6 +802,45 @@ static int bnxt_flash_nvram(struct net_device *dev,
        return rc;
 }
 
+static int bnxt_firmware_reset(struct net_device *dev,
+                              u16 dir_type)
+{
+       struct bnxt *bp = netdev_priv(dev);
+       struct hwrm_fw_reset_input req = {0};
+
+       bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FW_RESET, -1, -1);
+
+       /* TODO: Support ASAP ChiMP self-reset (e.g. upon PF driver unload) */
+       /* TODO: Address self-reset of APE/KONG/BONO/TANG or ungraceful reset */
+       /*       (e.g. when firmware isn't already running) */
+       switch (dir_type) {
+       case BNX_DIR_TYPE_CHIMP_PATCH:
+       case BNX_DIR_TYPE_BOOTCODE:
+       case BNX_DIR_TYPE_BOOTCODE_2:
+               req.embedded_proc_type = FW_RESET_REQ_EMBEDDED_PROC_TYPE_BOOT;
+               /* Self-reset ChiMP upon next PCIe reset: */
+               req.selfrst_status = FW_RESET_REQ_SELFRST_STATUS_SELFRSTPCIERST;
+               break;
+       case BNX_DIR_TYPE_APE_FW:
+       case BNX_DIR_TYPE_APE_PATCH:
+               req.embedded_proc_type = FW_RESET_REQ_EMBEDDED_PROC_TYPE_MGMT;
+               break;
+       case BNX_DIR_TYPE_KONG_FW:
+       case BNX_DIR_TYPE_KONG_PATCH:
+               req.embedded_proc_type =
+                       FW_RESET_REQ_EMBEDDED_PROC_TYPE_NETCTRL;
+               break;
+       case BNX_DIR_TYPE_BONO_FW:
+       case BNX_DIR_TYPE_BONO_PATCH:
+               req.embedded_proc_type = FW_RESET_REQ_EMBEDDED_PROC_TYPE_ROCE;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+}
+
 static int bnxt_flash_firmware(struct net_device *dev,
                               u16 dir_type,
                               const u8 *fw_data,
@@ -856,10 +895,9 @@ static int bnxt_flash_firmware(struct net_device *dev,
        /* TODO: Validate digital signature (RSA-encrypted SHA-256 hash) here */
        rc = bnxt_flash_nvram(dev, dir_type, BNX_DIR_ORDINAL_FIRST,
                              0, 0, fw_data, fw_size);
-       if (rc == 0) {  /* Firmware update successful */
-               /* TODO: Notify processor it needs to reset itself
-                */
-       }
+       if (rc == 0)    /* Firmware update successful */
+               rc = bnxt_firmware_reset(dev, dir_type);
+
        return rc;
 }