package/kernel/mac80211/patches/324-ath9k-add-new-function-ath9k_hw_read_array.patch

   1 From: Oleksij Rempel <linux@rempel-privat.de>
   2 Date: Sun, 22 Mar 2015 19:29:51 +0100
   3 Subject: [PATCH] ath9k: add new function ath9k_hw_read_array
   4
   5 REG_READ generate most overhead on usb bus. It send and read micro packages
   6 and reduce usb bandwidth. To reduce this overhead we should read in batches.
   7
   8 Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
   9 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  10 ---
  11
  12 --- a/drivers/net/wireless/ath/ath9k/hw.c
  13 +++ b/drivers/net/wireless/ath/ath9k/hw.c
  14 @@ -121,6 +121,36 @@ void ath9k_hw_write_array(struct ath_hw
  15         REGWRITE_BUFFER_FLUSH(ah);
  16  }
  17
  18 +void ath9k_hw_read_array(struct ath_hw *ah, u32 array[][2], int size)
  19 +{
  20 +       u32 *tmp_reg_list, *tmp_data;
  21 +       int i;
  22 +
  23 +       tmp_reg_list = kmalloc(size * sizeof(u32), GFP_KERNEL);
  24 +       if (!tmp_reg_list) {
  25 +               dev_err(ah->dev, "%s: tmp_reg_list: alloc filed\n", __func__);
  26 +               return;
  27 +       }
  28 +
  29 +       tmp_data = kmalloc(size * sizeof(u32), GFP_KERNEL);
  30 +       if (!tmp_data) {
  31 +               dev_err(ah->dev, "%s tmp_data: alloc filed\n", __func__);
  32 +               goto error_tmp_data;
  33 +       }
  34 +
  35 +       for (i = 0; i < size; i++)
  36 +               tmp_reg_list[i] = array[i][0];
  37 +
  38 +       REG_READ_MULTI(ah, tmp_reg_list, tmp_data, size);
  39 +
  40 +       for (i = 0; i < size; i++)
  41 +               array[i][1] = tmp_data[i];
  42 +
  43 +       kfree(tmp_data);
  44 +error_tmp_data:
  45 +       kfree(tmp_reg_list);
  46 +}
  47 +
  48  u32 ath9k_hw_reverse_bits(u32 val, u32 n)
  49  {
  50         u32 retval;
  51 --- a/drivers/net/wireless/ath/ath9k/hw.h
  52 +++ b/drivers/net/wireless/ath/ath9k/hw.h
  53 @@ -138,6 +138,8 @@
  54
  55  #define REG_WRITE_ARRAY(iniarray, column, regWr) \
  56         ath9k_hw_write_array(ah, iniarray, column, &(regWr))
  57 +#define REG_READ_ARRAY(ah, array, size) \
  58 +       ath9k_hw_read_array(ah, array, size)
  59
  60  #define AR_GPIO_OUTPUT_MUX_AS_OUTPUT             0
  61  #define AR_GPIO_OUTPUT_MUX_AS_PCIE_ATTENTION_LED 1
  62 @@ -1020,6 +1022,7 @@ void ath9k_hw_synth_delay(struct ath_hw
  63  bool ath9k_hw_wait(struct ath_hw *ah, u32 reg, u32 mask, u32 val, u32 timeout);
  64  void ath9k_hw_write_array(struct ath_hw *ah, const struct ar5416IniArray *array,
  65                           int column, unsigned int *writecnt);
  66 +void ath9k_hw_read_array(struct ath_hw *ah, u32 array[][2], int size);
  67  u32 ath9k_hw_reverse_bits(u32 val, u32 n);
  68  u16 ath9k_hw_computetxtime(struct ath_hw *ah,
  69                            u8 phy, int kbps,