From a57cb45a0a051601e14f81436b62750cc4f478c3 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Sun, 22 Mar 2015 19:29:51 +0100 Subject: 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: Oleksij Rempel Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath9k/hw.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'drivers/net/wireless/ath/ath9k/hw.c') diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index cc8bea8a957f..6d5b4bc8ab48 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -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; -- cgit v1.2.3