qlcnic: check IDC version

Warn user if IDC version mismatch with different class of drivers.

Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 19 insertions, 2 deletions

diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index ed9df150c20f..8a9412fd2ff5 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -53,6 +53,7 @@
 #define _QLCNIC_LINUX_MINOR 0
 #define _QLCNIC_LINUX_SUBVERSION 2
 #define QLCNIC_LINUX_VERSIONID  "5.0.2"
+#define QLCNIC_DRV_IDC_VER  0x01
 
 #define QLCNIC_VERSION_CODE(a, b, c)    (((a) << 24) + ((b) << 16) + (c))
 #define _major(v)       (((v) >> 24) & 0xff)
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 50be833c3767..54a6bb20ec07 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -1975,12 +1975,25 @@ qlcnic_check_drv_state(struct qlcnic_adapter *adapter)
                 return 1;
 }
 
+static int qlcnic_check_idc_ver(struct qlcnic_adapter *adapter)
+{
+        u32 val = QLCRD32(adapter, QLCNIC_CRB_DRV_IDC_VER);
+
+        if (val != QLCNIC_DRV_IDC_VER) {
+                dev_warn(&adapter->pdev->dev, "IDC Version mismatch, driver's"
+                        " idc ver = %x; reqd = %x\n", QLCNIC_DRV_IDC_VER, val);
+        }
+
+        return 0;
+}
+
 static int
 qlcnic_can_start_firmware(struct qlcnic_adapter *adapter)
 {
         u32 val, prev_state;
         u8 dev_init_timeo = adapter->dev_init_timeo;
         u8 portnum = adapter->portnum;
+        u8 ret;
 
         if (test_and_clear_bit(__QLCNIC_START_FW, &adapter->state))
                 return 1;
@@ -2000,12 +2013,14 @@ qlcnic_can_start_firmware(struct qlcnic_adapter *adapter)
         switch (prev_state) {
         case QLCNIC_DEV_COLD:
                 QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_INITIALIZING);
+                QLCWR32(adapter, QLCNIC_CRB_DRV_IDC_VER, QLCNIC_DRV_IDC_VER);
                 qlcnic_api_unlock(adapter);
                 return 1;
 
         case QLCNIC_DEV_READY:
+                ret = qlcnic_check_idc_ver(adapter);
                 qlcnic_api_unlock(adapter);
-                return 0;
+                return ret;
 
         case QLCNIC_DEV_NEED_RESET:
                 val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
@@ -2048,9 +2063,10 @@ qlcnic_can_start_firmware(struct qlcnic_adapter *adapter)
         QLC_DEV_CLR_RST_QSCNT(val, portnum);
         QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);
 
+        ret = qlcnic_check_idc_ver(adapter);
         qlcnic_api_unlock(adapter);
 
-        return 0;
+        return ret;
 }
 
 static void