Return-path: Received: from mout.gmx.net ([212.227.15.19]:58409 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751332AbbCUIrh (ORCPT ); Sat, 21 Mar 2015 04:47:37 -0400 From: Oleksij Rempel To: linux-wireless@vger.kernel.org, kvalo@codeaurora.org, ath9k-devel@lists.ath9k.org Cc: Oleksij Rempel Subject: [PATCH v2 06/18] ath9k: add new function ath9k_hw_read_array Date: Sat, 21 Mar 2015 09:47:09 +0100 Message-Id: <1426927641-18474-7-git-send-email-linux@rempel-privat.de> (sfid-20150321_094752_259669_EB5BE68C) In-Reply-To: <1426927641-18474-1-git-send-email-linux@rempel-privat.de> References: <1426927641-18474-1-git-send-email-linux@rempel-privat.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: 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 --- drivers/net/wireless/ath/ath9k/hw.c | 20 ++++++++++++++++++++ drivers/net/wireless/ath/ath9k/hw.h | 3 +++ 2 files changed, 23 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 60aa8d7..15433c7 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -121,6 +121,26 @@ 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); + tmp_data = kmalloc(size * sizeof(u32), GFP_KERNEL); + + 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_reg_list); + kfree(tmp_data); +} + u32 ath9k_hw_reverse_bits(u32 val, u32 n) { u32 retval; diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index f1864cc..66aba10 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -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 @@ -1020,6 +1022,7 @@ 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, -- 1.9.1