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Commit a57cb45a authored by Oleksij Rempel's avatar Oleksij Rempel Committed by Kalle Valo
Browse files

ath9k: add new function ath9k_hw_read_array 



REG_READ generate most overhead on usb bus. It send and read micro packages
and reduce usb bandwidth. To reduce this overhead we should read in batches.

Signed-off-by: default avatarOleksij Rempel <linux@rempel-privat.de>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent d55ce0a6

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

+30 −0
Original line number Diff line number Diff line
@@ -121,6 +121,36 @@ void ath9k_hw_write_array(struct ath_hw *ah, const struct ar5416IniArray *array, 
	REGWRITE_BUFFER_FLUSH(ah);

}



void ath9k_hw_read_array(struct ath_hw *ah, u32 array[][2], int size)

{

	u32 *tmp_reg_list, *tmp_data;

	int i;



	tmp_reg_list = kmalloc(size * sizeof(u32), GFP_KERNEL);

	if (!tmp_reg_list) {

		dev_err(ah->dev, "%s: tmp_reg_list: alloc filed\n", __func__);

		return;

	}



	tmp_data = kmalloc(size * sizeof(u32), GFP_KERNEL);

	if (!tmp_data) {

		dev_err(ah->dev, "%s tmp_data: alloc filed\n", __func__);

		goto error_tmp_data;

	}



	for (i = 0; i < size; i++)

		tmp_reg_list[i] = array[i][0];



	REG_READ_MULTI(ah, tmp_reg_list, tmp_data, size);



	for (i = 0; i < size; i++)

		array[i][1] = tmp_data[i];



	kfree(tmp_data);

error_tmp_data:

	kfree(tmp_reg_list);

}



u32 ath9k_hw_reverse_bits(u32 val, u32 n)

{

	u32 retval;

drivers/net/wireless/ath/ath9k/hw.h

+3 −0
Original line number Diff line number Diff line
@@ -138,6 +138,8 @@ 


#define REG_WRITE_ARRAY(iniarray, column, regWr) \

	ath9k_hw_write_array(ah, iniarray, column, &(regWr))

#define REG_READ_ARRAY(ah, array, size) \

	ath9k_hw_read_array(ah, array, size)



#define AR_GPIO_OUTPUT_MUX_AS_OUTPUT             0

#define AR_GPIO_OUTPUT_MUX_AS_PCIE_ATTENTION_LED 1
@@ -1030,6 +1032,7 @@ void ath9k_hw_synth_delay(struct ath_hw *ah, struct ath9k_channel *chan, 
bool ath9k_hw_wait(struct ath_hw *ah, u32 reg, u32 mask, u32 val, u32 timeout);

void ath9k_hw_write_array(struct ath_hw *ah, const struct ar5416IniArray *array,

			  int column, unsigned int *writecnt);

void ath9k_hw_read_array(struct ath_hw *ah, u32 array[][2], int size);

u32 ath9k_hw_reverse_bits(u32 val, u32 n);

u16 ath9k_hw_computetxtime(struct ath_hw *ah,

			   u8 phy, int kbps,