From: Linus Lüssing <[email protected]> 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:
[ 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 <[email protected]> --- 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 [email protected] https://lists.openwrt.org/mailman/listinfo/openwrt-devel
