Re: [PATCH V2] ath10k: don't fail if IRAM write fails

Hello, I have the same problem with my QCA9984 cards and also tested the
patch successfully.

See > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939937

best regards



Am 12.08.21 um 22:21 schrieb Axel Rasmussen:

Sorry again for the slow response time.

I got around to testing this today on my hardware. I tested with a
vanilla 5.13.8 kernel, and then the same kernel with this patch
applied. Long story short, the patch does indeed seem to at least work
around the issue I was seeing in [1]. With this patch applied, I still
get the same "failed to copy target iram contents" error, but the
interface comes up and seems to be functional regardless.

So, for what it's worth (granted I am no wireless expert!), you can take:

Tested-by: Axel Rasmussen <axelrasmussen@google.com>

(This issue has nothing to do with my full time job, but I'm meant to
use my @google.com address for any open source contributions, which I
believe applies to commit messages too.)

[1]: https://lists.infradead.org/pipermail/ath10k/2021-May/012626.html



Here are the two dmesg outputs, for comparison:

# uname -a
Linux router 5.13.8 #1 SMP Wed Aug 11 20:18:51 PDT 2021 x86_64 AMD
GX-412TC SOC AuthenticAMD GNU/Linux
# dmesg | grep ath
[   12.491747] ath10k_pci 0000:04:00.0: pci irq msi oper_irq_mode 2
irq_mode 0 reset_mode 0
[   12.613341] ath10k_pci 0000:04:00.0: qca9984/qca9994 hw1.0 target
0x01000000 chip_id 0x00000000 sub 168c:cafe
[   12.613367] ath10k_pci 0000:04:00.0: kconfig debug 1 debugfs 1
tracing 1 dfs 1 testmode 0
[   12.615071] ath10k_pci 0000:04:00.0: firmware ver
10.4-3.9.0.2-00131 api 5 features
no-p2p,mfp,peer-flow-ctrl,btcoex-param,allows-mesh-bcast,no-ps,peer-fixed-rate,iram-recovery
crc32 23bd9e43
[   13.846538] ath10k_pci 0000:04:00.0: board_file api 2 bmi_id 0:31
crc32 85498734
[   16.428502] ath10k_pci 0000:04:00.0: failed to copy target iram contents: -12
[   16.518692] ath10k_pci 0000:04:00.0: could not init core (-12)
[   16.518950] ath10k_pci 0000:04:00.0: could not probe fw (-12)



# uname -a
Linux router 5.13.8+ #2 SMP Wed Aug 11 20:28:56 PDT 2021 x86_64 AMD
GX-412TC SOC AuthenticAMD GNU/Linux
# dmesg | grep ath
[   12.201239] ath10k_pci 0000:04:00.0: pci irq msi oper_irq_mode 2
irq_mode 0 reset_mode 0
[   12.323354] ath10k_pci 0000:04:00.0: qca9984/qca9994 hw1.0 target
0x01000000 chip_id 0x00000000 sub 168c:cafe
[   12.323407] ath10k_pci 0000:04:00.0: kconfig debug 1 debugfs 1
tracing 1 dfs 1 testmode 0
[   12.325162] ath10k_pci 0000:04:00.0: firmware ver
10.4-3.9.0.2-00131 api 5 features
no-p2p,mfp,peer-flow-ctrl,btcoex-param,allows-mesh-bcast,no-ps,peer-fixed-rate,iram-reco
very crc32 23bd9e43
[   13.556748] ath10k_pci 0000:04:00.0: board_file api 2 bmi_id 0:31
crc32 85498734
[   16.155848] ath10k_pci 0000:04:00.0: No hardware memory
[   16.155873] ath10k_pci 0000:04:00.0: failed to copy target iram contents: -12
[   16.267376] ath10k_pci 0000:04:00.0: htt-ver 2.2 wmi-op 6 htt-op 4
cal otp max-sta 512 raw 0 hwcrypto 1
[   16.382257] ath: EEPROM regdomain sanitized
[   16.382289] ath: EEPROM regdomain: 0x64
[   16.382306] ath: EEPROM indicates we should expect a direct regpair map
[   16.382312] ath: Country alpha2 being used: 00
[   16.382316] ath: Regpair used: 0x64
[   16.393599] ath10k_pci 0000:04:00.0 wlp4s0: renamed from wlan0
[   41.264025] ath10k_pci 0000:04:00.0: No hardware memory
[   41.264045] ath10k_pci 0000:04:00.0: failed to copy target iram contents: -12
[   41.480677] ath10k_pci 0000:04:00.0: Unknown eventid: 36933

On Sun, Aug 1, 2021 at 7:23 PM Axel Rasmussen [off-list ref] wrote:

quoted

On Thu, Jul 22, 2021 at 12:42 PM ojab // [off-list ref] wrote:

quoted

See also: https://lists.infradead.org/pipermail/ath10k/2021-May/012626.html

On Thu, 22 Jul 2021 at 22:36, ojab [off-list ref] wrote:

quoted

After reboot with kernel & firmware updates I found `failed to copy
target iram contents:` in dmesg and missing wlan interfaces for both
of my QCA9984 compex cards. Rolling back kernel/firmware didn't fixed
it, so while I have no idea what's actually happening, I don't see why
we should fail in this case, looks like some optional firmware ability
that could be skipped.

Also with additional logging there is

[    6.839858] ath10k_pci 0000:04:00.0: No hardware memory
[    6.841205] ath10k_pci 0000:04:00.0: failed to copy target iram contents: -12
[    6.873578] ath10k_pci 0000:07:00.0: No hardware memory
[    6.875052] ath10k_pci 0000:07:00.0: failed to copy target iram contents: -12

so exact branch could be seen.

Signed-off-by: Slava Kardakov <redacted>
---
  Of course I forgot to sing off, since I don't use it by default because I
  hate my real name and kernel requires it

Thanks for working on this! And sorry for the slow response. I've been
unexpectedly very busy lately, but I plan to test out this patch next
week.

quoted

quoted

  drivers/net/wireless/ath/ath10k/core.c | 9 ++++++---
  1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 2f9be182fbfb..d9fd5294e142 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c

@@ -2691,8 +2691,10 @@ static int ath10k_core_copy_target_iram(struct ath10k *ar)
         u32 len, remaining_len;

         hw_mem = ath10k_coredump_get_mem_layout(ar);
-       if (!hw_mem)
+       if (!hw_mem) {
+               ath10k_warn(ar, "No hardware memory");
                 return -ENOMEM;
+       }

         for (i = 0; i < hw_mem->region_table.size; i++) {
                 tmp = &hw_mem->region_table.regions[i];

@@ -2702,8 +2704,10 @@ static int ath10k_core_copy_target_iram(struct ath10k *ar)
                 }
         }

-       if (!mem_region)
+       if (!mem_region) {
+               ath10k_warn(ar, "No memory region");
                 return -ENOMEM;
+       }

         for (i = 0; i < ar->wmi.num_mem_chunks; i++) {
                 if (ar->wmi.mem_chunks[i].req_id ==

@@ -2917,7 +2921,6 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode,
                 if (status) {
                         ath10k_warn(ar, "failed to copy target iram contents: %d",
                                     status);
-                       goto err_hif_stop;
                 }
         }

--

2.32.0

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