Hi Linus, > -----Original Message----- > From: openwrt-devel [mailto:openwrt-devel-boun...@lists.openwrt.org] > On Behalf Of Linus Lüssing > Sent: Montag, 25. Mai 2020 09:40 > To: openwrt-devel@lists.openwrt.org > Cc: Linus Lüssing <l...@simonwunderlich.de>; Sven Eckelmann > <s...@narfation.org> > Subject: [OpenWrt-Devel] [PATCH] layerscape: kernel: cma: increase CMA > buffer size from 16 to 32MB > > From: Linus Lüssing <l...@simonwunderlich.de> > > 16MB are not enough for ath10k to initialize three 4x4 AC Wave 2 PCIe cards > (168c:0046: Qualcomm Atheros QCA9984 802.11ac Wave 2 Wireless Network > Adapter). > This leads to the following error when trying to initialize the third > one:
layerscape is already at kernel 5.4, so please patch this config file. Despite, armv7 uses 64 MB ? Best Adrian > > [ 16.742475] ath10k_pci 0002:01:00.0: pci irq msi oper_irq_mode 2 irq_mode > 0 reset_mode 0 > [ 16.874024] ath10k_pci 0002:01:00.0: Direct firmware load for ath10k/pre- > cal-pci-0002:01:00.0.bin failed with error -2 > [ 16.884784] ath10k_pci 0002:01:00.0: Direct firmware load for ath10k/cal- > pci-0002:01:00.0.bin failed with error -2 > [ 16.895224] ath10k_pci 0002:01:00.0: Direct firmware load for > ath10k/QCA9984/hw1.0/firmware-6.bin failed with error -2 > [ 16.905956] ath10k_pci 0002:01:00.0: qca9984/qca9994 hw1.0 target > 0x01000000 chip_id 0x00000000 sub 168c:cafe > [ 16.915881] ath10k_pci 0002:01:00.0: kconfig debug 0 debugfs 1 tracing 0 > dfs > 1 testmode 1 > [ 16.925422] ath10k_pci 0002:01:00.0: firmware ver 10.4-3.9.0.2-00021 api 5 > features no-p2p,mfp,peer-flow-ctrl,btcoex-param,allows-mesh-bcast,no-ps > crc32 9626782c > [ 18.169022] ath10k_pci 0002:01:00.0: board_file api 2 bmi_id 0:31 crc32 > cf58c3bc > [ 20.692482] cma: cma_alloc: alloc failed, req-size: 200 pages, ret: -12 > [ 25.882670] ath10k_pci 0002:01:00.0: wmi service ready event not received > [ 25.943121] ath10k_pci 0002:01:00.0: could not init core (-110) > [ 25.949048] ath10k_pci 0002:01:00.0: could not probe fw (-110) > > Fixing this issue by doubling the CMA buffer size from 16 to 32MB. > New values in /proc/meminfo, with three such cards connected: > > root@OpenWrt:/# cat /proc/meminfo | grep -i "cma" > CmaTotal: 32768 kB > CmaFree: 19268 kB > > Interestingly, older Qualcomm AC cards > (Qualcomm Atheros QCA986x/988x 802.11ac Wireless Network Adapter) > don't seem to use the Contiguous Memory Allocator and therefore don't > suffer from this issue. > > Signed-off-by: Linus Lüssing <l...@simonwunderlich.de> > --- > target/linux/layerscape/armv8_64b/config-4.14 | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/target/linux/layerscape/armv8_64b/config-4.14 > b/target/linux/layerscape/armv8_64b/config-4.14 > index c1bd718366..ef1bbadd2b 100644 > --- a/target/linux/layerscape/armv8_64b/config-4.14 > +++ b/target/linux/layerscape/armv8_64b/config-4.14 > @@ -140,7 +140,7 @@ CONFIG_CMA_ALIGNMENT=8 > CONFIG_CMA_AREAS=7 > # CONFIG_CMA_DEBUG is not set > # CONFIG_CMA_DEBUGFS is not set > -CONFIG_CMA_SIZE_MBYTES=16 > +CONFIG_CMA_SIZE_MBYTES=32 > # CONFIG_CMA_SIZE_SEL_MAX is not set > CONFIG_CMA_SIZE_SEL_MBYTES=y > # CONFIG_CMA_SIZE_SEL_MIN is not set > -- > 2.27.0.rc0 > > > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/mailman/listinfo/openwrt-devel
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