ath6kl: Add debugfs file entry to dump credit distribution stats

It would be at <dbgfs_root>/ieee80211/phyX/ath6kl/credit_dist_stats.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c
index 5a082c0f34cdcea1c5f849f51b297c245a3a4ee1..2b462876cec165378dc5ecb43c0510ba352c9cb9 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/debug.c
+++ b/drivers/net/wireless/ath/ath6kl/debug.c
@@ -290,6 +290,72 @@ static const struct file_operations fops_tgt_stats = {
        .llseek = default_llseek,
 };
 
+#define print_credit_info(fmt_str, ep_list_field)              \
+       (len += scnprintf(buf + len, buf_len - len, fmt_str,    \
+                        ep_list->ep_list_field))
+#define CREDIT_INFO_DISPLAY_STRING_LEN 200
+#define CREDIT_INFO_LEN        128
+
+static ssize_t read_file_credit_dist_stats(struct file *file,
+                                          char __user *user_buf,
+                                          size_t count, loff_t *ppos)
+{
+       struct ath6kl *ar = file->private_data;
+       struct htc_target *target = ar->htc_target;
+       struct htc_endpoint_credit_dist *ep_list;
+       char *buf;
+       unsigned int buf_len, len = 0;
+       ssize_t ret_cnt;
+
+       buf_len = CREDIT_INFO_DISPLAY_STRING_LEN +
+                 get_queue_depth(&target->cred_dist_list) * CREDIT_INFO_LEN;
+       buf = kzalloc(buf_len, GFP_KERNEL);
+       if (!buf)
+               return -ENOMEM;
+
+       len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",
+                        "Total Avail Credits: ",
+                        target->cred_dist_cntxt->total_avail_credits);
+       len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",
+                        "Free credits :",
+                        target->cred_dist_cntxt->cur_free_credits);
+
+       len += scnprintf(buf + len, buf_len - len,
+                        " Epid  Flags    Cred_norm  Cred_min  Credits  Cred_assngd"
+                        "  Seek_cred  Cred_sz  Cred_per_msg  Cred_to_dist"
+                        "  qdepth\n");
+
+       list_for_each_entry(ep_list, &target->cred_dist_list, list) {
+               print_credit_info("  %2d", endpoint);
+               print_credit_info("%10x", dist_flags);
+               print_credit_info("%8d", cred_norm);
+               print_credit_info("%9d", cred_min);
+               print_credit_info("%9d", credits);
+               print_credit_info("%10d", cred_assngd);
+               print_credit_info("%13d", seek_cred);
+               print_credit_info("%12d", cred_sz);
+               print_credit_info("%9d", cred_per_msg);
+               print_credit_info("%14d", cred_to_dist);
+               len += scnprintf(buf + len, buf_len - len, "%12d\n",
+                                get_queue_depth(&((struct htc_endpoint *)
+                                                ep_list->htc_rsvd)->txq));
+       }
+
+       if (len > buf_len)
+               len = buf_len;
+
+       ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+       kfree(buf);
+       return ret_cnt;
+}
+
+static const struct file_operations fops_credit_dist_stats = {
+       .read = read_file_credit_dist_stats,
+       .open = ath6kl_debugfs_open,
+       .owner = THIS_MODULE,
+       .llseek = default_llseek,
+};
+
 int ath6kl_debug_init(struct ath6kl *ar)
 {
        ar->debugfs_phy = debugfs_create_dir("ath6kl",
@@ -300,6 +366,9 @@ int ath6kl_debug_init(struct ath6kl *ar)
        debugfs_create_file("tgt_stats", S_IRUSR, ar->debugfs_phy, ar,
                            &fops_tgt_stats);
 
+       debugfs_create_file("credit_dist_stats", S_IRUSR, ar->debugfs_phy, ar,
+                           &fops_credit_dist_stats);
+
        return 0;
 }
 #endif