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openwrt/package/kernel/ath10k-ct/patches/960-0010-ath10k-limit-htt-rx-ring-size.patch

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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>
2019-12-22 18:20:57 +00:00
--- a/ath10k-4.19/htt.h
+++ b/ath10k-4.19/htt.h
@@ -237,7 +237,11 @@ enum htt_rx_ring_flags {
};
#define HTT_RX_RING_SIZE_MIN 128
+#ifndef CONFIG_ATH10K_SMALLBUFFERS
#define HTT_RX_RING_SIZE_MAX 2048
+#else
+#define HTT_RX_RING_SIZE_MAX 512
+#endif
#define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
#define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
#define HTT_RX_RING_FILL_LEVEL_DUAL_MAC (HTT_RX_RING_SIZE - 1)
--- a/ath10k-5.2/htt.h
+++ b/ath10k-5.2/htt.h
@@ -225,7 +225,11 @@ enum htt_rx_ring_flags {
};
#define HTT_RX_RING_SIZE_MIN 128
+#ifndef CONFIG_ATH10K_SMALLBUFFERS
#define HTT_RX_RING_SIZE_MAX 2048
+#else
+#define HTT_RX_RING_SIZE_MAX 512
+#endif
#define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
#define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
#define HTT_RX_RING_FILL_LEVEL_DUAL_MAC (HTT_RX_RING_SIZE - 1)
ath10k-ct: Use ath10k-ct version 5.4 This makes ath10k-ct use the version based on kernel 5.4 by default. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2019-11-09 16:06:06 +00:00
--- a/ath10k-5.4/htt.h
+++ b/ath10k-5.4/htt.h
@@ -225,7 +225,11 @@ enum htt_rx_ring_flags {
};
#define HTT_RX_RING_SIZE_MIN 128
+#ifndef CONFIG_ATH10K_SMALLBUFFERS
#define HTT_RX_RING_SIZE_MAX 2048
+#else
+#define HTT_RX_RING_SIZE_MAX 512
+#endif
#define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
#define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
#define HTT_RX_RING_FILL_LEVEL_DUAL_MAC (HTT_RX_RING_SIZE - 1)
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