wifi: iwlwifi: increase number of RX buffers for EHT devices

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.

type=feature
ticket=jira:WIFI-276661

Change-Id: Ie5b4a2d3953072b9d76054ae67e2e45900d6bba4
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-on: https://gerritwcs.ir.intel.com/c/iwlwifi-stack-dev/+/52853
tested: iil_jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
automatic-review: iil_jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
Tested-by: iil_jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
Reviewed-by: Greenman, Gregory <gregory.greenman@intel.com>
x-iwlwifi-stack-dev: 959f6ab06fd9385ac778dd3db70354ee0b85c1c5

3 files changed, 9 insertions, 13 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/bz.c b/drivers/net/wireless/intel/iwlwifi/cfg/bz.c
index c07b492c3a..cc1ff75550 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/bz.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/bz.c
@@ -169,12 +169,10 @@ static const struct iwl_ht_params iwl_gl_a_ht_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,
@@ -196,7 +194,7 @@ 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_a0_fm_a0 = {
@@ -204,7 +202,7 @@ const struct iwl_cfg iwl_cfg_gl_a0_fm_a0 = {
 	.uhb_supported = true,
 	IWL_DEVICE_GL_A,
 	.features = IWL_TX_CSUM_NETIF_FLAGS | NETIF_F_RXCSUM,
-	.num_rbds = IWL_NUM_RBDS_BZ_HE,
+	.num_rbds = IWL_NUM_RBDS_BZ_EHT,
 };
 
 const struct iwl_cfg iwl_cfg_gl = {
@@ -212,7 +210,7 @@ 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 ad283fd22e..d624302599 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));
diff --git a/versions b/versions
index 0f0f0c831e..be0f57056d 100644
--- a/versions
+++ b/versions
@@ -2,4 +2,4 @@ BACKPORTS_VERSION="(see git)"
 BACKPORTED_KERNEL_VERSION="(see git)"
 BACKPORTED_KERNEL_NAME="iwlwifi"
 BACKPORTS_BUILD_TSTAMP=__DATE__ \" \" __TIME__
-BACKPORTS_GIT_TRACKED="iwlwifi-stack-public:master:11196:840ffd06"
+BACKPORTS_GIT_TRACKED="iwlwifi-stack-public:master:11197:959f6ab0"