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Commit 15340694 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

ath9k: add debugfs files for reading/writing the rx and tx chainmask 



Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent c8a72c00

drivers/net/wireless/ath/ath9k/debug.c

+92 −0
Original line number Diff line number Diff line
@@ -77,6 +77,90 @@ static const struct file_operations fops_debug = { 


#define DMA_BUF_LEN 1024



static ssize_t read_file_tx_chainmask(struct file *file, char __user *user_buf,

			     size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	char buf[32];

	unsigned int len;



	len = snprintf(buf, sizeof(buf), "0x%08x\n", common->tx_chainmask);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);

}



static ssize_t write_file_tx_chainmask(struct file *file, const char __user *user_buf,

			     size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	unsigned long mask;

	char buf[32];

	ssize_t len;



	len = min(count, sizeof(buf) - 1);

	if (copy_from_user(buf, user_buf, len))

		return -EINVAL;



	buf[len] = '\0';

	if (strict_strtoul(buf, 0, &mask))

		return -EINVAL;



	common->tx_chainmask = mask;

	sc->sc_ah->caps.tx_chainmask = mask;

	return count;

}



static const struct file_operations fops_tx_chainmask = {

	.read = read_file_tx_chainmask,

	.write = write_file_tx_chainmask,

	.open = ath9k_debugfs_open,

	.owner = THIS_MODULE

};





static ssize_t read_file_rx_chainmask(struct file *file, char __user *user_buf,

			     size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	char buf[32];

	unsigned int len;



	len = snprintf(buf, sizeof(buf), "0x%08x\n", common->rx_chainmask);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);

}



static ssize_t write_file_rx_chainmask(struct file *file, const char __user *user_buf,

			     size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	unsigned long mask;

	char buf[32];

	ssize_t len;



	len = min(count, sizeof(buf) - 1);

	if (copy_from_user(buf, user_buf, len))

		return -EINVAL;



	buf[len] = '\0';

	if (strict_strtoul(buf, 0, &mask))

		return -EINVAL;



	common->rx_chainmask = mask;

	sc->sc_ah->caps.rx_chainmask = mask;

	return count;

}



static const struct file_operations fops_rx_chainmask = {

	.read = read_file_rx_chainmask,

	.write = write_file_rx_chainmask,

	.open = ath9k_debugfs_open,

	.owner = THIS_MODULE

};





static ssize_t read_file_dma(struct file *file, char __user *user_buf,

			     size_t count, loff_t *ppos)

{
@@ -753,6 +837,14 @@ int ath9k_init_debug(struct ath_hw *ah) 
			sc, &fops_recv))

		goto err;



	if (!debugfs_create_file("rx_chainmask", S_IRUSR | S_IWUSR,

			sc->debug.debugfs_phy, sc, &fops_rx_chainmask))

		goto err;



	if (!debugfs_create_file("tx_chainmask", S_IRUSR | S_IWUSR,

			sc->debug.debugfs_phy, sc, &fops_tx_chainmask))

		goto err;



	return 0;

err:

	ath9k_exit_debug(ah);