This is a note to let you know that I've just added the patch titled
wifi: iwlwifi: increase number of RX buffers for EHT devices
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-iwlwifi-increase-number-of-rx-buffers-for-eht-d.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e6d319b05149c572e8207b061fb1f983266825c4
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date: Wed Aug 30 11:31:04 2023 +0300
wifi: iwlwifi: increase number of RX buffers for EHT devices
[ Upstream commit 2cf254c1e24fa8f01f42f5a8c77617e56bf50b86 ]
EHT devices can support 512 MPDUs in an A-MPDU, each of
which might be an A-MSDU and thus further contain multiple
MSDUs, which need their own buffer each. Increase the number
of buffers to avoid running out in high-throughput scenarios.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230830112059.824e522927f1.Ie5b4a2d3953072b9d76054ae67e2e45900d6bba4@changeid
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Stable-dep-of: 08365d3b9140 ("wifi: iwlwifi: mvm: fix netif csum flags")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/bz.c b/drivers/net/wireless/intel/iwlwifi/cfg/bz.c
index b9893b22e41da..3d223014cfe6d 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/bz.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/bz.c
@@ -134,12 +134,10 @@ static const struct iwl_base_params iwl_bz_base_params = {
.ht_params = &iwl_gl_a_ht_params
/*
- * If the device doesn't support HE, no need to have that many buffers.
- * These sizes were picked according to 8 MSDUs inside 256 A-MSDUs in an
+ * This size was picked according to 8 MSDUs inside 512 A-MSDUs in an
* A-MPDU, with additional overhead to account for processing time.
*/
-#define IWL_NUM_RBDS_NON_HE 512
-#define IWL_NUM_RBDS_BZ_HE 4096
+#define IWL_NUM_RBDS_BZ_EHT (512 * 16)
const struct iwl_cfg_trans_params iwl_bz_trans_cfg = {
.device_family = IWL_DEVICE_FAMILY_BZ,
@@ -161,7 +159,7 @@ const struct iwl_cfg iwl_cfg_bz = {
.uhb_supported = true,
IWL_DEVICE_BZ,
.features = IWL_TX_CSUM_NETIF_FLAGS_BZ | NETIF_F_RXCSUM,
- .num_rbds = IWL_NUM_RBDS_BZ_HE,
+ .num_rbds = IWL_NUM_RBDS_BZ_EHT,
};
const struct iwl_cfg iwl_cfg_gl = {
@@ -169,7 +167,7 @@ const struct iwl_cfg iwl_cfg_gl = {
.uhb_supported = true,
IWL_DEVICE_BZ,
.features = IWL_TX_CSUM_NETIF_FLAGS_BZ | NETIF_F_RXCSUM,
- .num_rbds = IWL_NUM_RBDS_BZ_HE,
+ .num_rbds = IWL_NUM_RBDS_BZ_EHT,
};
diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/sc.c b/drivers/net/wireless/intel/iwlwifi/cfg/sc.c
index ad283fd22e2a2..d6243025993ea 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/sc.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/sc.c
@@ -127,12 +127,10 @@ static const struct iwl_base_params iwl_sc_base_params = {
.ht_params = &iwl_22000_ht_params
/*
- * If the device doesn't support HE, no need to have that many buffers.
- * These sizes were picked according to 8 MSDUs inside 256 A-MSDUs in an
+ * This size was picked according to 8 MSDUs inside 512 A-MSDUs in an
* A-MPDU, with additional overhead to account for processing time.
*/
-#define IWL_NUM_RBDS_NON_HE 512
-#define IWL_NUM_RBDS_SC_HE 4096
+#define IWL_NUM_RBDS_SC_EHT (512 * 16)
const struct iwl_cfg_trans_params iwl_sc_trans_cfg = {
.device_family = IWL_DEVICE_FAMILY_SC,
@@ -154,7 +152,7 @@ const struct iwl_cfg iwl_cfg_sc = {
.uhb_supported = true,
IWL_DEVICE_SC,
.features = IWL_TX_CSUM_NETIF_FLAGS_BZ | NETIF_F_RXCSUM,
- .num_rbds = IWL_NUM_RBDS_SC_HE,
+ .num_rbds = IWL_NUM_RBDS_SC_EHT,
};
MODULE_FIRMWARE(IWL_SC_A_FM_B_FW_MODULE_FIRMWARE(IWL_SC_UCODE_API_MAX));
