package/kernel/mac80211/patches/ath11k/903-ath11k-support-setting-FW-memory-mode-via-DT.patch

   1 From fb1c40c225cbc413d82c872dd8c8af3469b2b921 Mon Sep 17 00:00:00 2001
   2 From: Robert Marko <robimarko@gmail.com>
   3 Date: Fri, 16 Dec 2022 17:17:52 +0100
   4 Subject: [PATCH] ath11k: support setting FW memory mode via DT
   5
   6 ath11k is really memory intensive for devices with less that 1GB of RAM,
   7 so lets allow saving a significant amount of memory by setting the FW to
   8 Mode-1 via DTS for devices that need it.
   9
  10 However the drawback is reduced number of VDEV-s and peers which is a
  11 reasonable tradeoff.
  12
  13 Mode-2 allows for further reduction, but it has further restrictions.
  14
  15 While we are here, lets add a print to be able to easily determine what
  16 FW memory mode is being used.
  17
  18 Signed-off-by: Robert Marko <robimarko@gmail.com>
  19 ---
  20  drivers/net/wireless/ath/ath11k/core.c | 28 ++++++++++++++++++++++++--
  21  1 file changed, 26 insertions(+), 2 deletions(-)
  22
  23 --- a/drivers/net/wireless/ath/ath11k/core.c
  24 +++ b/drivers/net/wireless/ath/ath11k/core.c
  25 @@ -36,7 +36,7 @@ bool ath11k_ftm_mode;
  26  module_param_named(ftm_mode, ath11k_ftm_mode, bool, 0444);
  27  MODULE_PARM_DESC(ftm_mode, "Boots up in factory test mode");
  28
  29 -static const struct ath11k_hw_params ath11k_hw_params[] = {
  30 +static struct ath11k_hw_params ath11k_hw_params[] = {
  31         {
  32                 .hw_rev = ATH11K_HW_IPQ8074,
  33                 .name = "ipq8074 hw2.0",
  34 @@ -2040,7 +2040,8 @@ static void ath11k_core_reset(struct wor
  35  static int ath11k_init_hw_params(struct ath11k_base *ab)
  36  {
  37         const struct ath11k_hw_params *hw_params = NULL;
  38 -       int i;
  39 +       u32 fw_mem_mode;
  40 +       int i, ret;
  41
  42         for (i = 0; i < ARRAY_SIZE(ath11k_hw_params); i++) {
  43                 hw_params = &ath11k_hw_params[i];
  44 @@ -2056,7 +2057,31 @@ static int ath11k_init_hw_params(struct
  45
  46         ab->hw_params = *hw_params;
  47
  48 +       ret = of_property_read_u32(ab->dev->of_node,
  49 +                                  "qcom,ath11k-fw-memory-mode",
  50 +                                  &fw_mem_mode);
  51 +       if (!ret) {
  52 +               if (fw_mem_mode == 0) {
  53 +                       ab->hw_params.fw_mem_mode = 0;
  54 +                       ab->hw_params.num_vdevs = 16 + 1;
  55 +                       ab->hw_params.num_peers = 512;
  56 +               }
  57 +               else if (fw_mem_mode == 1) {
  58 +                       ab->hw_params.fw_mem_mode = 1;
  59 +                       ab->hw_params.num_vdevs = 8;
  60 +                       ab->hw_params.num_peers = 128;
  61 +               } else if (fw_mem_mode == 2) {
  62 +                       ab->hw_params.fw_mem_mode = 2;
  63 +                       ab->hw_params.num_vdevs = 8;
  64 +                       ab->hw_params.num_peers = 128;
  65 +                       ab->hw_params.coldboot_cal_mm = false;
  66 +                       ab->hw_params.coldboot_cal_ftm = false;
  67 +               } else
  68 +                       ath11k_info(ab, "Unsupported FW memory mode: %u\n", fw_mem_mode);
  69 +       }
  70 +
  71         ath11k_info(ab, "%s\n", ab->hw_params.name);
  72 +       ath11k_info(ab, "FW memory mode: %d\n", ab->hw_params.fw_mem_mode);
  73
  74         return 0;
  75  }