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ath10k: implement fw_checksums debugfs file

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When debugging firmware problems it's useful to check checksums of each
component. Add a debugfs interface to retrieve crc32 checksums:

# cat /sys/kernel/debug/ieee80211/phy0/ath10k/fw_checksums
firmware-N.bin          cc3fb466
athwlan                 c0089f21
otp                     f3efeb4f
codeswap                00000000
board-N.bin             bebc7c08
board                   bebc7c08

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Kalle Valo 2015-11-25 15:38:41 +02:00
parent 3e58044b61
commit 9e100c4d01
1 changed files with 56 additions and 0 deletions
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56
drivers/net/wireless/ath/ath10k/debug.c
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@ -2161,6 +2161,59 @@ static const struct file_operations fops_btcoex = {
.open = simple_open
};
static ssize_t ath10k_debug_fw_checksums_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath10k *ar = file->private_data;
unsigned int len = 0, buf_len = 4096;
ssize_t ret_cnt;
char *buf;
buf = kzalloc(buf_len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
mutex_lock(&ar->conf_mutex);
if (len > buf_len)
len = buf_len;
len += scnprintf(buf + len, buf_len - len,
"firmware-N.bin\t\t%08x\n",
crc32_le(0, ar->firmware->data, ar->firmware->size));
len += scnprintf(buf + len, buf_len - len,
"athwlan\t\t\t%08x\n",
crc32_le(0, ar->firmware_data, ar->firmware_len));
len += scnprintf(buf + len, buf_len - len,
"otp\t\t\t%08x\n",
crc32_le(0, ar->otp_data, ar->otp_len));
len += scnprintf(buf + len, buf_len - len,
"codeswap\t\t%08x\n",
crc32_le(0, ar->swap.firmware_codeswap_data,
ar->swap.firmware_codeswap_len));
len += scnprintf(buf + len, buf_len - len,
"board-N.bin\t\t%08x\n",
crc32_le(0, ar->board->data, ar->board->size));
len += scnprintf(buf + len, buf_len - len,
"board\t\t\t%08x\n",
crc32_le(0, ar->board_data, ar->board_len));
ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
mutex_unlock(&ar->conf_mutex);
kfree(buf);
return ret_cnt;
}
static const struct file_operations fops_fw_checksums = {
.read = ath10k_debug_fw_checksums_read,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
int ath10k_debug_create(struct ath10k *ar)
{
ar->debug.fw_crash_data = vzalloc(sizeof(*ar->debug.fw_crash_data));
@ -2274,6 +2327,9 @@ int ath10k_debug_register(struct ath10k *ar)
debugfs_create_file("btcoex", S_IRUGO | S_IWUSR,
ar->debug.debugfs_phy, ar, &fops_btcoex);
debugfs_create_file("fw_checksums", S_IRUSR,
ar->debug.debugfs_phy, ar, &fops_fw_checksums);
return 0;
}