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- From: Oleksij Rempel <[email protected]>
- Date: Sun, 22 Mar 2015 19:29:51 +0100
- Subject: [PATCH] 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 <[email protected]>
- Signed-off-by: Kalle Valo <[email protected]>
- ---
- --- 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
- 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;
- --- 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
- 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,
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