mwifiex: save driver information to file when firmware dump

This patch adds support to dump driver information to a file
when firmware dump happens. This information can be used to
root casue FW crash.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/mwifiex/ethtool.c b/drivers/net/wireless/mwifiex/ethtool.c
index 04e56b5..65d8d6d 100644 (file)
--- a/drivers/net/wireless/mwifiex/ethtool.c
+++ b/drivers/net/wireless/mwifiex/ethtool.c
@@ -76,7 +76,9 @@ mwifiex_get_dump_flag(struct net_device *dev, struct ethtool_dump *dump)
 
        dump->flag = adapter->curr_mem_idx;
        dump->version = 1;
-       if (adapter->curr_mem_idx != MWIFIEX_FW_DUMP_IDX) {
+       if (adapter->curr_mem_idx == MWIFIEX_DRV_INFO_IDX) {
+               dump->len = adapter->drv_info_size;
+       } else if (adapter->curr_mem_idx != MWIFIEX_FW_DUMP_IDX) {
                entry = &adapter->mem_type_mapping_tbl[adapter->curr_mem_idx];
                dump->len = entry->mem_size;
        } else {
@@ -98,6 +100,13 @@ mwifiex_get_dump_data(struct net_device *dev, struct ethtool_dump *dump,
        if (!adapter->if_ops.fw_dump)
                return -ENOTSUPP;
 
+       if (adapter->curr_mem_idx == MWIFIEX_DRV_INFO_IDX) {
+               if (!adapter->drv_info_dump)
+                       return -EFAULT;
+               memcpy(p, adapter->drv_info_dump, adapter->drv_info_size);
+               return 0;
+       }
+
        if (adapter->curr_mem_idx == MWIFIEX_FW_DUMP_IDX) {
                dev_err(adapter->dev, "firmware dump in progress!!\n");
                return -EBUSY;
@@ -125,6 +134,11 @@ static int mwifiex_set_dump(struct net_device *dev, struct ethtool_dump *val)
        if (!adapter->if_ops.fw_dump)
                return -ENOTSUPP;
 
+       if (val->flag == MWIFIEX_DRV_INFO_IDX) {
+               adapter->curr_mem_idx = MWIFIEX_DRV_INFO_IDX;
+               return 0;
+       }
+
        if (adapter->curr_mem_idx == MWIFIEX_FW_DUMP_IDX) {
                dev_err(adapter->dev, "firmware dump in progress!!\n");
                return -EBUSY;

diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c
index 520ad4a..a3dd601 100644 (file)
--- a/drivers/net/wireless/mwifiex/init.c
+++ b/drivers/net/wireless/mwifiex/init.c
@@ -411,6 +411,11 @@ mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
                entry->mem_size = 0;
        }
 
+       if (adapter->drv_info_dump) {
+               vfree(adapter->drv_info_dump);
+               adapter->drv_info_size = 0;
+       }
+
        if (adapter->sleep_cfm)
                dev_kfree_skb_any(adapter->sleep_cfm);
 }

diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index 0c44c5e..4edaaf4 100644 (file)
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -801,6 +801,108 @@ mwifiex_tx_timeout(struct net_device *dev)
        }
 }
 
+void mwifiex_dump_drv_info(struct mwifiex_adapter *adapter)
+{
+       void *p;
+       char drv_version[64];
+       struct usb_card_rec *cardp;
+       struct sdio_mmc_card *sdio_card;
+       struct mwifiex_private *priv;
+       int i, idx;
+       struct netdev_queue *txq;
+       struct mwifiex_debug_info *debug_info;
+
+       if (adapter->drv_info_dump) {
+               vfree(adapter->drv_info_dump);
+               adapter->drv_info_size = 0;
+       }
+
+       dev_info(adapter->dev, "=== DRIVER INFO DUMP START===\n");
+
+       adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX);
+
+       if (!adapter->drv_info_dump)
+               return;
+
+       p = (char *)(adapter->drv_info_dump);
+       p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
+
+       mwifiex_drv_get_driver_version(adapter, drv_version,
+                                      sizeof(drv_version) - 1);
+       p += sprintf(p, "driver_version = %s\n", drv_version);
+
+       if (adapter->iface_type == MWIFIEX_USB) {
+               cardp = (struct usb_card_rec *)adapter->card;
+               p += sprintf(p, "tx_cmd_urb_pending = %d\n",
+                            atomic_read(&cardp->tx_cmd_urb_pending));
+               p += sprintf(p, "tx_data_urb_pending = %d\n",
+                            atomic_read(&cardp->tx_data_urb_pending));
+               p += sprintf(p, "rx_cmd_urb_pending = %d\n",
+                            atomic_read(&cardp->rx_cmd_urb_pending));
+               p += sprintf(p, "rx_data_urb_pending = %d\n",
+                            atomic_read(&cardp->rx_data_urb_pending));
+       }
+
+       p += sprintf(p, "tx_pending = %d\n",
+                    atomic_read(&adapter->tx_pending));
+       p += sprintf(p, "rx_pending = %d\n",
+                    atomic_read(&adapter->rx_pending));
+
+       if (adapter->iface_type == MWIFIEX_SDIO) {
+               sdio_card = (struct sdio_mmc_card *)adapter->card;
+               p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
+                            sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
+               p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
+                            sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
+       }
+
+       for (i = 0; i < adapter->priv_num; i++) {
+               if (!adapter->priv[i] || !adapter->priv[i]->netdev)
+                       continue;
+               priv = adapter->priv[i];
+               p += sprintf(p, "\n[interface  : \"%s\"]\n",
+                            priv->netdev->name);
+               p += sprintf(p, "wmm_tx_pending[0] = %d\n",
+                            atomic_read(&priv->wmm_tx_pending[0]));
+               p += sprintf(p, "wmm_tx_pending[1] = %d\n",
+                            atomic_read(&priv->wmm_tx_pending[1]));
+               p += sprintf(p, "wmm_tx_pending[2] = %d\n",
+                            atomic_read(&priv->wmm_tx_pending[2]));
+               p += sprintf(p, "wmm_tx_pending[3] = %d\n",
+                            atomic_read(&priv->wmm_tx_pending[3]));
+               p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
+                            "Disconnected" : "Connected");
+               p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
+                            ? "on" : "off"));
+               for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
+                       txq = netdev_get_tx_queue(priv->netdev, idx);
+                       p += sprintf(p, "tx queue %d:%s  ", idx,
+                                    netif_tx_queue_stopped(txq) ?
+                                    "stopped" : "started");
+               }
+               p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
+                            priv->netdev->name, priv->num_tx_timeout);
+       }
+
+       p += sprintf(p, "\n=== MORE DEBUG INFORMATION\n");
+       debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
+       if (debug_info) {
+               for (i = 0; i < adapter->priv_num; i++) {
+                       if (!adapter->priv[i] || !adapter->priv[i]->netdev)
+                               continue;
+                       priv = adapter->priv[i];
+                       mwifiex_get_debug_info(priv, debug_info);
+                       p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
+                       break;
+               }
+               kfree(debug_info);
+       }
+
+       adapter->drv_info_size = p - adapter->drv_info_dump;
+       dev_info(adapter->dev, "=== DRIVER INFO DUMP END===\n");
+}
+EXPORT_SYMBOL_GPL(mwifiex_dump_drv_info);
+
 /*
  * CFG802.11 network device handler for statistics retrieval.
  */

diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index 6f7e060..2f085de 100644 (file)
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -41,6 +41,8 @@
 #include "util.h"
 #include "fw.h"
 #include "pcie.h"
+#include "usb.h"
+#include "sdio.h"
 
 extern const char driver_version[];
 
@@ -136,6 +138,8 @@ enum {
 /* Threshold for tx_timeout_cnt before we trigger a card reset */
 #define TX_TIMEOUT_THRESHOLD   6
 
+#define MWIFIEX_DRV_INFO_SIZE_MAX 0x40000
+
 struct mwifiex_dbg {
        u32 num_cmd_host_to_card_failure;
        u32 num_cmd_sleep_cfm_host_to_card_failure;
@@ -413,6 +417,7 @@ struct mwifiex_roc_cfg {
 };
 
 #define MWIFIEX_FW_DUMP_IDX            0xff
+#define MWIFIEX_DRV_INFO_IDX           20
 #define FW_DUMP_MAX_NAME_LEN           8
 #define FW_DUMP_HOST_READY             0xEE
 #define FW_DUMP_DONE                   0xFF
@@ -867,6 +872,8 @@ struct mwifiex_adapter {
        struct memory_type_mapping *mem_type_mapping_tbl;
        u8 num_mem_types;
        u8 curr_mem_idx;
+       void *drv_info_dump;
+       u32 drv_info_size;
        bool scan_chan_gap_enabled;
        struct sk_buff_head rx_data_q;
        struct mwifiex_chan_stats *chan_stats;
@@ -1360,6 +1367,8 @@ void mwifiex_hist_data_add(struct mwifiex_private *priv,
 u8 mwifiex_adjust_data_rate(struct mwifiex_private *priv,
                            u8 rx_rate, u8 ht_info);
 
+void mwifiex_dump_drv_info(struct mwifiex_adapter *adapter);
+
 #ifdef CONFIG_DEBUG_FS
 void mwifiex_debugfs_init(void);
 void mwifiex_debugfs_remove(void);

diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c
index 933dae1..6bdfe67 100644 (file)
--- a/drivers/net/wireless/mwifiex/sdio.c
+++ b/drivers/net/wireless/mwifiex/sdio.c
@@ -2023,6 +2023,8 @@ static void mwifiex_sdio_fw_dump_work(struct work_struct *work)
        u32 memory_size;
        static char *env[] = { "DRIVER=mwifiex_sdio", "EVENT=fw_dump", NULL };
 
+       mwifiex_dump_drv_info(adapter);
+
        if (!card->supports_fw_dump)
                return;