diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2021-08-02 21:58:53 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2021-08-26 23:34:26 +0300 |
| commit | 9de168a01279db655052a19b56662656bc94ea89 (patch) | |
| tree | 363e3de23c39b6623684d7022801a93bda441926 /drivers | |
| parent | 6c0795f1a52410f2dccc63cd0993ae1a38856c77 (diff) | |
| download | linux-9de168a01279db655052a19b56662656bc94ea89.tar.xz | |
iwlwifi: pcie: implement Bz reset flow
Bz device reset flow changed, now the hardware (instead of
firmware) will reset the PCI bus etc., this can take up to
100ms.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210802215208.df30875c6ff9.I962ed0f2c3358903dc6ba1abb65726ce5acbbd48@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c index fa416b42bd9d..bf0c32a74ca4 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c @@ -131,9 +131,21 @@ void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans) if (trans_pcie->is_down) return; - if (trans_pcie->fw_reset_handshake && - trans->state >= IWL_TRANS_FW_STARTED) - iwl_trans_pcie_fw_reset_handshake(trans); + if (trans->state >= IWL_TRANS_FW_STARTED) { + if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) { + iwl_set_bit(trans, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_BUS_MASTER_DISABLE_REQ); + iwl_poll_bit(trans, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_BUS_MASTER_DISABLE_STATUS, + CSR_GP_CNTRL_REG_FLAG_BUS_MASTER_DISABLE_STATUS, + 5000); + msleep(100); + iwl_set_bit(trans, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_SW_RESET); + } else if (trans_pcie->fw_reset_handshake) { + iwl_trans_pcie_fw_reset_handshake(trans); + } + } trans_pcie->is_down = true; |