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70 lines
2.1 KiB
Diff
70 lines
2.1 KiB
Diff
From: Oleksij Rempel <linux@rempel-privat.de>
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Date: Sun, 22 Mar 2015 19:29:51 +0100
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Subject: [PATCH] ath9k: add new function ath9k_hw_read_array
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REG_READ generate most overhead on usb bus. It send and read micro packages
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and reduce usb bandwidth. To reduce this overhead we should read in batches.
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Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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--- a/drivers/net/wireless/ath/ath9k/hw.c
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+++ b/drivers/net/wireless/ath/ath9k/hw.c
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@@ -121,6 +121,36 @@ void ath9k_hw_write_array(struct ath_hw
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REGWRITE_BUFFER_FLUSH(ah);
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}
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+void ath9k_hw_read_array(struct ath_hw *ah, u32 array[][2], int size)
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+{
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+ u32 *tmp_reg_list, *tmp_data;
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+ int i;
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+
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+ tmp_reg_list = kmalloc(size * sizeof(u32), GFP_KERNEL);
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+ if (!tmp_reg_list) {
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+ dev_err(ah->dev, "%s: tmp_reg_list: alloc filed\n", __func__);
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+ return;
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+ }
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+
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+ tmp_data = kmalloc(size * sizeof(u32), GFP_KERNEL);
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+ if (!tmp_data) {
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+ dev_err(ah->dev, "%s tmp_data: alloc filed\n", __func__);
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+ goto error_tmp_data;
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+ }
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+
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+ for (i = 0; i < size; i++)
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+ tmp_reg_list[i] = array[i][0];
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+
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+ REG_READ_MULTI(ah, tmp_reg_list, tmp_data, size);
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+
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+ for (i = 0; i < size; i++)
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+ array[i][1] = tmp_data[i];
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+
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+ kfree(tmp_data);
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+error_tmp_data:
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+ kfree(tmp_reg_list);
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+}
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+
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u32 ath9k_hw_reverse_bits(u32 val, u32 n)
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{
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u32 retval;
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--- a/drivers/net/wireless/ath/ath9k/hw.h
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+++ b/drivers/net/wireless/ath/ath9k/hw.h
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@@ -138,6 +138,8 @@
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#define REG_WRITE_ARRAY(iniarray, column, regWr) \
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ath9k_hw_write_array(ah, iniarray, column, &(regWr))
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+#define REG_READ_ARRAY(ah, array, size) \
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+ ath9k_hw_read_array(ah, array, size)
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#define AR_GPIO_OUTPUT_MUX_AS_OUTPUT 0
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#define AR_GPIO_OUTPUT_MUX_AS_PCIE_ATTENTION_LED 1
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@@ -1020,6 +1022,7 @@ void ath9k_hw_synth_delay(struct ath_hw
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bool ath9k_hw_wait(struct ath_hw *ah, u32 reg, u32 mask, u32 val, u32 timeout);
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void ath9k_hw_write_array(struct ath_hw *ah, const struct ar5416IniArray *array,
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int column, unsigned int *writecnt);
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+void ath9k_hw_read_array(struct ath_hw *ah, u32 array[][2], int size);
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u32 ath9k_hw_reverse_bits(u32 val, u32 n);
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u16 ath9k_hw_computetxtime(struct ath_hw *ah,
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u8 phy, int kbps,
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