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Commit 9e100c4d authored by Kalle Valo's avatar Kalle Valo
Browse files

ath10k: implement fw_checksums debugfs file 



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: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 3e58044b

drivers/net/wireless/ath/ath10k/debug.c

+56 −0
Original line number Diff line number Diff line
@@ -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;

}