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| author | Johannes Berg <johannes.berg@intel.com> | 2026-05-27 23:04:58 +0300 |
|---|---|---|
| committer | Miri Korenblit <miriam.rachel.korenblit@intel.com> | 2026-06-03 17:02:54 +0300 |
| commit | e1ed149b321e8eab9957c109efa79fd850b5ff98 (patch) | |
| tree | 2d549483ca0699f79db81c06464aefccf90eeb4e /drivers/net/wireless/intel/iwlwifi/pcie | |
| parent | 1821c068aa5ea852970b5c9ca05b21681f5d8e83 (diff) | |
| download | linux-next-e1ed149b321e8eab9957c109efa79fd850b5ff98.tar.gz linux-next-e1ed149b321e8eab9957c109efa79fd850b5ff98.zip | |
wifi: iwlwifi: fw: cut down NIC wakeups during dump
Currently, the dump code attempts to dump any number of
memories and register banks, as defined by the firmware.
Especially when the device is failing, this can lead to
excessive time spent attempting to acquire NIC access
over and over again.
Improve the code to only attempt to acquire NIC access
once or twice, but using the new memory dump functions
that may drop the spinlock etc. Mark all dump regions
that require NIC access, and skip them if we couldn't
obtain that.
In order to avoid CPU latency due to the increased time
holding the spinlock (and possibly disabling softirqs),
drop locks and call cond_resched() after each section
(if holding NIC access) but don't release HW NIC access.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20260527230313.bec886142cc8.I41f2eaf2403b38147504d5dab0a7414de2699adc@changeid
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/internal.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/trans.c | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/internal.h index abc0c831d1ca..d84c7c1efee1 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/internal.h +++ b/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/internal.h @@ -1203,6 +1203,7 @@ void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg, int iwl_trans_pcie_read_config32(struct iwl_trans *trans, u32 ofs, u32 *val); bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans); +void iwl_trans_pcie_resched_with_nic_access(struct iwl_trans *trans); void __releases(nic_access_nobh) iwl_trans_pcie_release_nic_access(struct iwl_trans *trans); void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power); diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/trans.c index 1c4ee76d8387..40fd5f3fdeb7 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/trans.c @@ -2424,7 +2424,7 @@ bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans) return false; } -static void iwl_trans_pcie_resched_with_nic_access(struct iwl_trans *trans) +void iwl_trans_pcie_resched_with_nic_access(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |