Fiouz
November 5, 2021, 7:21am
1288
Correct, but that fix isn't needed for the 21.x branch in the first place, as the faulty mac80211 implementation was only recently backported to the master branch (21.x was branched off many months ago).
The bug on OpenWrt master was discussed at
With r17842-b428f187f0-20211024 I have clients connected to both 2.4 and 5 GHz networks, with the default ath10k-ct wifi driver.
I haven't really looked into the mainline ath10k.
Ps. you might highlight that upstream patch to @hauke who just merged the newest batch of the upstream mac80211 wifi backports. As the fix was apparently accepted by upstream, the fix will trickle down to us at some point.
References (from upstream Linux):
committed 06:07PM - 23 Nov 20 UTC
This target IRAM recovery feature support is to copy target
IRAM contents availa… ble at ATH10K_MEM_REGION_TYPE_REG to host
memory for back up after firmware loaded. Target IRAM contents
are copied to wmi memory chunks allocated for the
WMI_IRAM_RECOVERY_HOST_MEM_REQ_ID and provide the wmi chunks
address to the firmware through wmi init command.
If firmware detects andy IRAM corruption through periodic
checksum validation, It will download the IRAM contents back
from the provided wmi memory chunks address using hif_memcpy.
This IRAM recovery feature prevent target assert in case of
unexpected target IRAM corruptions.
This patch also introduce a new feature flag 'iram-recovery' for
backward compatibility.
Tested-on: QCA9888 10.4-3.9.0.2-00094
Signed-off-by: Venkateswara Naralasetty <vnaralas@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1604657442-23674-1-git-send-email-vnaralas@codeaurora.org
committed 01:05PM - 25 Oct 21 UTC
Commit 9af7c32ceca8 ("ath10k: add target IRAM recovery feature support")
introdu… ced a new firmware feature flag ATH10K_FW_FEATURE_IRAM_RECOVERY. But
this caused ath10k_pci module load to fail if ATH10K_FW_CRASH_DUMP_RAM_DATA bit
was not enabled in the ath10k coredump_mask module parameter:
[ 2209.328190] ath10k_pci 0000:02:00.0: qca9984/qca9994 hw1.0 target 0x01000000 chip_id 0x00000000 sub 168c:cafe
[ 2209.434414] ath10k_pci 0000:02:00.0: kconfig debug 1 debugfs 1 tracing 1 dfs 1 testmode 1
[ 2209.547191] ath10k_pci 0000:02:00.0: firmware ver 10.4-3.9.0.2-00099 api 5 features no-p2p,mfp,peer-flow-ctrl,btcoex-param,allows-mesh-bcast,no-ps,peer-fixed-rate,iram-recovery crc32 cbade90a
[ 2210.896485] ath10k_pci 0000:02:00.0: board_file api 1 bmi_id 0:1 crc32 a040efc2
[ 2213.603339] ath10k_pci 0000:02:00.0: failed to copy target iram contents: -12
[ 2213.839027] ath10k_pci 0000:02:00.0: could not init core (-12)
[ 2213.933910] ath10k_pci 0000:02:00.0: could not probe fw (-12)
And by default coredump_mask does not have ATH10K_FW_CRASH_DUMP_RAM_DATA
enabled so anyone using a firmware with iram-recovery feature would fail. To my
knowledge only QCA9984 firmwares starting from release 10.4-3.9.0.2-00099
enabled the feature.
The reason for regression was that ath10k_core_copy_target_iram() used
ath10k_coredump_get_mem_layout() to get the memory layout, but when
ATH10K_FW_CRASH_DUMP_RAM_DATA was disabled it would get just NULL and bail out
with an error.
While looking at all this I noticed another bug: if CONFIG_DEV_COREDUMP is
disabled but the firmware has iram-recovery enabled the module load fails with
similar error messages. I fixed that by returning 0 from
ath10k_core_copy_target_iram() when _ath10k_coredump_get_mem_layout() returns
NULL.
Tested-on: QCA9984 hw2.0 PCI 10.4-3.9.0.2-00139
Fixes: 9af7c32ceca8 ("ath10k: add target IRAM recovery feature support")
Signed-off-by: Abinaya Kalaiselvan <akalaise@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211020075054.23061-1-kvalo@codeaurora.org
Edit: I'm referring to the OpenWrt master and 21.x branches, not the one from ACwifidude, but I guess he would not have performed the mac80211 backport himself as I'd guess it's not strictly specific to NSS.
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