linux-kernel - [PATCH] iwlwifi: Increase microcodes loading timeout

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Date:   Fri,  3 Dec 2021 10:09:28 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     luciano.coelho@...el.com
Cc:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Dror Moshe <drorx.moshe@...el.com>,
        Miri Korenblit <miriam.rachel.korenblit@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Mordechay Goodstein <mordechay.goodstein@...el.com>,
        Abhishek Naik <abhishek.naik@...el.com>,
        Gregory Greenman <gregory.greenman@...el.com>,
        Ayala Barazani <ayala.barazani@...el.com>,
        Harish Mitty <harish.mitty@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] iwlwifi: Increase microcodes loading timeout

Intel AX201/AX211 device may not work at boot:
[    8.875307] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x7267, CPU2 Status: 0xb03
[    8.875418] iwlwifi 0000:00:14.3: UMAC PC: 0x80481126
[    8.875426] iwlwifi 0000:00:14.3: LMAC PC: 0x1541c
[    8.875430] iwlwifi 0000:00:14.3: WRT: Collecting data: ini trigger 13 fired (delay=0ms).
[    8.877906] iwlwifi 0000:00:14.3: Loaded firmware version: 64.97bbee0a.0 so-a0-gf-a0-64.ucode
...
[    8.878997] iwlwifi 0000:00:14.3: Failed to start RT ucode: -110
[    8.878999] iwlwifi 0000:00:14.3: Failed to start RT ucode: -110

Increase MVM_UCODE_ALIVE_TIMEOUT to 2 seconds can solve the issue.

The PNVM loading can also fail:
[    5.159949] iwlwifi 0000:00:14.3: loaded PNVM version 4b50f925
[    5.414211] iwlwifi 0000:00:14.3: Timeout waiting for PNVM load!
[    5.414219] iwlwifi 0000:00:14.3: Failed to start RT ucode: -110
[    5.414224] iwlwifi 0000:00:14.3: WRT: Collecting data: ini trigger 13 fired (delay=0ms).
[    5.416618] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[    5.416619] iwlwifi 0000:00:14.3: Transport status: 0x00000042, valid: 6
[    5.416620] iwlwifi 0000:00:14.3: Loaded firmware version: 64.97bbee0a.0 so-a0-gf-a0-64.ucode
...
[    5.914276] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -110

Trial and error shows that the MVM_UCODE_PNVM_TIMEOUT also needs to be
bumped to 2 seconds to fully eliminate the issue.

The timeout values are verified by rebooting over 10k times.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 drivers/net/wireless/intel/iwlwifi/fw/pnvm.h | 2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/pnvm.h b/drivers/net/wireless/intel/iwlwifi/fw/pnvm.h
index 203c367dd4dee..b730330d8feac 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/pnvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/pnvm.h
@@ -10,7 +10,7 @@
 
 #include "fw/notif-wait.h"
 
-#define MVM_UCODE_PNVM_TIMEOUT	(HZ / 4)
+#define MVM_UCODE_PNVM_TIMEOUT	(2 * HZ)
 
 #define MAX_PNVM_NAME  64
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index 6ce78c03e51f7..0c5375f7baecf 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -24,7 +24,7 @@
 #include "iwl-modparams.h"
 #include "iwl-nvm-parse.h"
 
-#define MVM_UCODE_ALIVE_TIMEOUT	(HZ)
+#define MVM_UCODE_ALIVE_TIMEOUT	(2 * HZ)
 #define MVM_UCODE_CALIB_TIMEOUT	(2 * HZ)
 
 #define UCODE_VALID_OK	cpu_to_le32(0x1)
-- 
2.32.0