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kernel: ath10k-ct: provide a build variant for small RAM devices
According to many bugreports [0][1][2] the default ath10k-ct kernel module is unusable on devices with just 64 MiB RAM or with 128 MiB and dual ath10k cards. The target boards boot but eventually oom-killer starts to interfere with normal operation, so the current state is effectively broken. Since the two patches in question have a performance impact (and possibly some other unexpected side-effects) a dedicated build variant is added so that users of the low RAM devices can still benefit from all the ath10k-ct advantages. According to testing [3] results, the issue can be experienced even with "a 256MB device with three radios". Measured performance impact of implementing small buffers was lowering "the maximum 5 GHz throughput on an IPQ40xx device without RPS/XPS optimizations from 494/432 Mbit/s for TCP transfers (download/upload) to 438/343 Mbit/s" The patches were apparently inspired by QSDK tweaks used by ODMs for the affected devices. [0] http://lists.infradead.org/pipermail/openwrt-devel/2019-December/020573.html [1] https://github.com/openwrt/openwrt/pull/1077 [2] https://bugs.openwrt.org/index.php?do=details&task_id=2664 [3] https://github.com/freifunk-gluon/gluon/pull/1440#issue-195607701 Signed-off-by: Paul Fertser <fercerpav@gmail.com> [Remove double CONFIG_ATH10K-CT_LEDS entry] Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Paul Fertser
Hauke Mehrtens
parent
c715f71bce
commit
1ac627024d
@ -35,6 +35,7 @@ define KernelPackage/ath10k-ct
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$(PKG_BUILD_DIR)/ath10k$(CT_KVER)/ath10k_core.ko
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AUTOLOAD:=$(call AutoProbe,ath10k_pci)
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PROVIDES:=kmod-ath10k
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VARIANT:=regular
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endef
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define KernelPackage/ath10k-ct/config
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@ -42,7 +43,13 @@ define KernelPackage/ath10k-ct/config
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config ATH10K-CT_LEDS
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bool "Enable LED support"
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default y
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depends on PACKAGE_kmod-ath10k-ct
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depends on PACKAGE_kmod-ath10k-ct || PACKAGE_kmod-ath10k-ct-smallbuffers
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endef
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define KernelPackage/ath10k-ct-smallbuffers
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$(call KernelPackage/ath10k-ct)
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TITLE+= (small buffers for low-RAM devices)
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VARIANT:=smallbuffers
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endef
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NOSTDINC_FLAGS = \
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@ -90,6 +97,10 @@ ifeq ($(CONFIG_ATH10K-CT_LEDS),y)
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NOSTDINC_FLAGS += -DCONFIG_ATH10K_LEDS
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endif
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ifeq ($(BUILD_VARIANT),smallbuffers)
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NOSTDINC_FLAGS += -DCONFIG_ATH10K_SMALLBUFFERS
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endif
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define Build/Configure
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cp $(STAGING_DIR)/usr/include/mac80211/ath/*.h $(PKG_BUILD_DIR)
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endef
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@ -107,3 +118,4 @@ define Build/Compile
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endef
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$(eval $(call KernelPackage,ath10k-ct))
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$(eval $(call KernelPackage,ath10k-ct-smallbuffers))
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@ -0,0 +1,28 @@
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--- a/ath10k-4.19/htt.h
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+++ b/ath10k-4.19/htt.h
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@@ -237,7 +237,11 @@ enum htt_rx_ring_flags {
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};
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#define HTT_RX_RING_SIZE_MIN 128
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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#define HTT_RX_RING_SIZE_MAX 2048
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+#else
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+#define HTT_RX_RING_SIZE_MAX 512
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+#endif
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#define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
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#define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
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#define HTT_RX_RING_FILL_LEVEL_DUAL_MAC (HTT_RX_RING_SIZE - 1)
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--- a/ath10k-5.2/htt.h
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+++ b/ath10k-5.2/htt.h
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@@ -225,7 +225,11 @@ enum htt_rx_ring_flags {
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};
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#define HTT_RX_RING_SIZE_MIN 128
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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#define HTT_RX_RING_SIZE_MAX 2048
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+#else
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+#define HTT_RX_RING_SIZE_MAX 512
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+#endif
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#define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
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#define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
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#define HTT_RX_RING_FILL_LEVEL_DUAL_MAC (HTT_RX_RING_SIZE - 1)
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@ -0,0 +1,100 @@
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--- a/ath10k-4.19/pci.c
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+++ b/ath10k-4.19/pci.c
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@@ -142,7 +142,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_htc_rx_cb,
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},
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@@ -151,7 +155,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 64,
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+#endif
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.recv_cb = ath10k_pci_htc_rx_cb,
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},
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@@ -178,7 +186,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 512,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_rx_cb,
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},
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@@ -203,7 +215,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 96,
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+#endif
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.recv_cb = ath10k_pci_pktlog_rx_cb,
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},
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--- a/ath10k-5.2/pci.c
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+++ b/ath10k-5.2/pci.c
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@@ -131,7 +131,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_htc_rx_cb,
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},
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@@ -140,7 +144,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 64,
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+#endif
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.recv_cb = ath10k_pci_htc_rx_cb,
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},
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@@ -167,7 +175,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 512,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_rx_cb,
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},
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@@ -192,7 +204,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 96,
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+#endif
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.recv_cb = ath10k_pci_pktlog_rx_cb,
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},
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