cxgb3 - Auto-load FW if mismatch detected

The driver attempts to upgrade the FW if the card has the wrong version.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 29 insertions, 2 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 5ff0922e628c..1b6459b218ca 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2374,6 +2374,7 @@ config CHELSIO_T1_NAPI
 config CHELSIO_T3
         tristate "Chelsio Communications T3 10Gb Ethernet support"
         depends on PCI
+        select FW_LOADER
         help
           This driver supports Chelsio T3-based gigabit and 10Gb Ethernet
           adapters.
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index eb0a4e068200..b9bcda821f7c 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -42,6 +42,7 @@
 #include <linux/workqueue.h>
 #include <linux/proc_fs.h>
 #include <linux/rtnetlink.h>
+#include <linux/firmware.h>
 #include <asm/uaccess.h>
 
 #include "common.h"
@@ -707,6 +708,28 @@ static void bind_qsets(struct adapter *adap)
         }
 }
 
+#define FW_FNAME "t3fw-%d.%d.bin"
+
+static int upgrade_fw(struct adapter *adap)
+{
+        int ret;
+        char buf[64];
+        const struct firmware *fw;
+        struct device *dev = &adap->pdev->dev;
+
+        snprintf(buf, sizeof(buf), FW_FNAME, FW_VERSION_MAJOR,
+                 FW_VERSION_MINOR);
+        ret = request_firmware(&fw, buf, dev);
+        if (ret < 0) {
+                dev_err(dev, "could not upgrade firmware: unable to load %s\n",
+                        buf);
+                return ret;
+        }
+        ret = t3_load_fw(adap, fw->data, fw->size);
+        release_firmware(fw);
+        return ret;
+}
+
 /**
  *      cxgb_up - enable the adapter
  *      @adapter: adapter being enabled
@@ -723,6 +746,8 @@ static int cxgb_up(struct adapter *adap)
 
         if (!(adap->flags & FULL_INIT_DONE)) {
                 err = t3_check_fw_version(adap);
+                if (err == -EINVAL)
+                        err = upgrade_fw(adap);
                 if (err)
                         goto out;
 
diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index eaa7a2e89a30..983ee813c7e4 100644
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -681,7 +681,8 @@ enum {
         SF_ERASE_SECTOR = 0xd8, /* erase sector */
 
         FW_FLASH_BOOT_ADDR = 0x70000,   /* start address of FW in flash */
-        FW_VERS_ADDR = 0x77ffc  /* flash address holding FW version */
+        FW_VERS_ADDR = 0x77ffc,    /* flash address holding FW version */
+        FW_MIN_SIZE = 8            /* at least version and csum */
 };
 
 /**
@@ -935,7 +936,7 @@ int t3_load_fw(struct adapter *adapter, const u8 *fw_data, unsigned int size)
         const u32 *p = (const u32 *)fw_data;
         int ret, addr, fw_sector = FW_FLASH_BOOT_ADDR >> 16;
 
-        if (size & 3)
+        if ((size & 3) || size < FW_MIN_SIZE)
                 return -EINVAL;
         if (size > FW_VERS_ADDR + 8 - FW_FLASH_BOOT_ADDR)
                 return -EFBIG;