iwlagn: add bluetooth stats to debugfs

For WiFi/BT combo devices, add bluetooth statistics counter
read function to debugfs.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

8 files changed, 113 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-1000.c b/drivers/net/wireless/iwlwifi/iwl-1000.c
index c281d07ec5e5..8848333bc3a9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-1000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-1000.c
@@ -222,6 +222,7 @@ static struct iwl_lib_ops iwl1000_lib = {
                 .rx_stats_read = iwl_ucode_rx_stats_read,
                 .tx_stats_read = iwl_ucode_tx_stats_read,
                 .general_stats_read = iwl_ucode_general_stats_read,
+                .bt_stats_read = iwl_ucode_bt_stats_read,
         },
         .recover_from_tx_stall = iwl_bg_monitor_recover,
         .check_plcp_health = iwl_good_plcp_health,
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 27a776f2f8fa..d6531ad3906a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -2285,6 +2285,7 @@ static struct iwl_lib_ops iwl4965_lib = {
                 .rx_stats_read = iwl_ucode_rx_stats_read,
                 .tx_stats_read = iwl_ucode_tx_stats_read,
                 .general_stats_read = iwl_ucode_general_stats_read,
+                .bt_stats_read = iwl_ucode_bt_stats_read,
         },
         .recover_from_tx_stall = iwl_bg_monitor_recover,
         .check_plcp_health = iwl_good_plcp_health,
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index a7077cd7afee..8093ce2804fb 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -398,6 +398,7 @@ static struct iwl_lib_ops iwl5000_lib = {
                 .rx_stats_read = iwl_ucode_rx_stats_read,
                 .tx_stats_read = iwl_ucode_tx_stats_read,
                 .general_stats_read = iwl_ucode_general_stats_read,
+                .bt_stats_read = iwl_ucode_bt_stats_read,
         },
         .recover_from_tx_stall = iwl_bg_monitor_recover,
         .check_plcp_health = iwl_good_plcp_health,
diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c
index a4e58d85f889..58270529a0e4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-6000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-6000.c
@@ -323,6 +323,7 @@ static struct iwl_lib_ops iwl6000_lib = {
                 .rx_stats_read = iwl_ucode_rx_stats_read,
                 .tx_stats_read = iwl_ucode_tx_stats_read,
                 .general_stats_read = iwl_ucode_general_stats_read,
+                .bt_stats_read = iwl_ucode_bt_stats_read,
         },
         .recover_from_tx_stall = iwl_bg_monitor_recover,
         .check_plcp_health = iwl_good_plcp_health,
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
index 19d1e5e86261..f052c6d09b37 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
@@ -924,3 +924,90 @@ ssize_t iwl_ucode_general_stats_read(struct file *file, char __user *user_buf,
         kfree(buf);
         return ret;
 }
+
+ssize_t iwl_ucode_bt_stats_read(struct file *file,
+                                char __user *user_buf,
+                                size_t count, loff_t *ppos)
+{
+        struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+        int pos = 0;
+        char *buf;
+        int bufsz = (sizeof(struct statistics_bt_activity) * 24) + 200;
+        ssize_t ret;
+        struct statistics_bt_activity *bt, *accum_bt;
+
+        if (!iwl_is_alive(priv))
+                return -EAGAIN;
+
+        /* make request to uCode to retrieve statistics information */
+        mutex_lock(&priv->mutex);
+        ret = iwl_send_statistics_request(priv, CMD_SYNC, false);
+        mutex_unlock(&priv->mutex);
+
+        if (ret) {
+                IWL_ERR(priv,
+                        "Error sending statistics request: %zd\n", ret);
+                return -EAGAIN;
+        }
+        buf = kzalloc(bufsz, GFP_KERNEL);
+        if (!buf) {
+                IWL_ERR(priv, "Can not allocate Buffer\n");
+                return -ENOMEM;
+        }
+
+        /*
+         * the statistic information display here is based on
+         * the last statistics notification from uCode
+         * might not reflect the current uCode activity
+         */
+        bt = &priv->_agn.statistics_bt.general.activity;
+        accum_bt = &priv->_agn.accum_statistics_bt.general.activity;
+
+        pos += iwl_statistics_flag(priv, buf, bufsz);
+        pos += scnprintf(buf + pos, bufsz - pos, "Statistics_BT:\n");
+        pos += scnprintf(buf + pos, bufsz - pos,
+                        "\t\t\tcurrent\t\t\taccumulative\n");
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "hi_priority_tx_req_cnt:\t\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->hi_priority_tx_req_cnt),
+                         accum_bt->hi_priority_tx_req_cnt);
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "hi_priority_tx_denied_cnt:\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->hi_priority_tx_denied_cnt),
+                         accum_bt->hi_priority_tx_denied_cnt);
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "lo_priority_tx_req_cnt:\t\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->lo_priority_tx_req_cnt),
+                         accum_bt->lo_priority_tx_req_cnt);
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "lo_priority_rx_denied_cnt:\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->lo_priority_tx_denied_cnt),
+                         accum_bt->lo_priority_tx_denied_cnt);
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "hi_priority_rx_req_cnt:\t\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->hi_priority_rx_req_cnt),
+                         accum_bt->hi_priority_rx_req_cnt);
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "hi_priority_rx_denied_cnt:\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->hi_priority_rx_denied_cnt),
+                         accum_bt->hi_priority_rx_denied_cnt);
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "lo_priority_rx_req_cnt:\t\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->lo_priority_rx_req_cnt),
+                         accum_bt->lo_priority_rx_req_cnt);
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "lo_priority_rx_denied_cnt:\t%u\t\t\t%u\n",
+                         le32_to_cpu(bt->lo_priority_rx_denied_cnt),
+                         accum_bt->lo_priority_rx_denied_cnt);
+
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "(rx)num_bt_kills:\t\t%u\t\t\t%u\n",
+                         le32_to_cpu(priv->_agn.statistics_bt.rx.
+                                general.num_bt_kills),
+                         priv->_agn.accum_statistics_bt.rx.
+                                general.num_bt_kills);
+
+        ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+        kfree(buf);
+        return ret;
+}
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.h b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.h
index 59b1f25f0d85..bbdce5913ac7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.h
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.h
@@ -37,6 +37,8 @@ ssize_t iwl_ucode_tx_stats_read(struct file *file, char __user *user_buf,
                                 size_t count, loff_t *ppos);
 ssize_t iwl_ucode_general_stats_read(struct file *file, char __user *user_buf,
                                      size_t count, loff_t *ppos);
+ssize_t iwl_ucode_bt_stats_read(struct file *file, char __user *user_buf,
+                                size_t count, loff_t *ppos);
 #else
 static ssize_t iwl_ucode_rx_stats_read(struct file *file, char __user *user_buf,
                                        size_t count, loff_t *ppos)
@@ -53,4 +55,9 @@ static ssize_t iwl_ucode_general_stats_read(struct file *file, char __user *user
 {
         return 0;
 }
+static ssize_t iwl_ucode_bt_stats_read(struct file *file, char __user *user_buf,
+                                       size_t count, loff_t *ppos)
+{
+        return 0;
+}
 #endif
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 2954a52a5e83..b60cf4537890 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -125,6 +125,8 @@ struct iwl_debugfs_ops {
                                  size_t count, loff_t *ppos);
         ssize_t (*general_stats_read)(struct file *file, char __user *user_buf,
                                       size_t count, loff_t *ppos);
+        ssize_t (*bt_stats_read)(struct file *file, char __user *user_buf,
+                                 size_t count, loff_t *ppos);
 };
 
 struct iwl_temp_ops {
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 7b25d1468358..e96a1bb12783 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -1519,6 +1519,16 @@ static ssize_t iwl_dbgfs_txfifo_flush_write(struct file *file,
         return count;
 }
 
+static ssize_t iwl_dbgfs_ucode_bt_stats_read(struct file *file,
+                                        char __user *user_buf,
+                                        size_t count, loff_t *ppos)
+{
+        struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+
+        return priv->cfg->ops->lib->debugfs_ops.bt_stats_read(file,
+                        user_buf, count, ppos);
+}
+
 DEBUGFS_READ_FILE_OPS(rx_statistics);
 DEBUGFS_READ_FILE_OPS(tx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -1541,6 +1551,7 @@ DEBUGFS_READ_WRITE_FILE_OPS(force_reset);
 DEBUGFS_READ_FILE_OPS(rxon_flags);
 DEBUGFS_READ_FILE_OPS(rxon_filter_flags);
 DEBUGFS_WRITE_FILE_OPS(txfifo_flush);
+DEBUGFS_READ_FILE_OPS(ucode_bt_stats);
 
 /*
  * Create the debugfs files and directories
@@ -1608,6 +1619,8 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
                 DEBUGFS_ADD_FILE(chain_noise, dir_debug, S_IRUSR);
         if (priv->cfg->ucode_tracing)
                 DEBUGFS_ADD_FILE(ucode_tracing, dir_debug, S_IWUSR | S_IRUSR);
+        if (priv->cfg->bt_statistics)
+                DEBUGFS_ADD_FILE(ucode_bt_stats, dir_debug, S_IRUSR);
         DEBUGFS_ADD_FILE(rxon_flags, dir_debug, S_IWUSR);
         DEBUGFS_ADD_FILE(rxon_filter_flags, dir_debug, S_IWUSR);
         if (priv->cfg->sensitivity_calib_by_driver)