From: Sara Sharon Date: Thu, 17 May 2018 11:04:19 +0000 (+0300) Subject: iwlwifi: fw: add a restart FW debug function X-Git-Tag: v4.20-rc1~27^2~198^2^2~30 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=d25eec305c9743e929b821933590c27c2a499975;p=linux.git iwlwifi: fw: add a restart FW debug function Move the restart FW debug code to a function. This avoids code duplication and lays the infra to support the new start and stop host commands in some future devices. Signed-off-by: Sara Sharon Signed-off-by: Luca Coelho --- diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c index 9963d6c84908..b0da16f3f474 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c @@ -1149,6 +1149,7 @@ void iwl_fw_error_dump_wk(struct work_struct *work) { struct iwl_fw_runtime *fwrt = container_of(work, struct iwl_fw_runtime, dump.wk.work); + struct iwl_fw_dbg_params params = {0}; if (fwrt->ops && fwrt->ops->dump_start && fwrt->ops->dump_start(fwrt->ops_ctx)) @@ -1162,38 +1163,16 @@ void iwl_fw_error_dump_wk(struct work_struct *work) goto out; } - if (fwrt->trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) { - /* stop recording */ - iwl_fw_dbg_stop_recording(fwrt->trans); - - iwl_fw_error_dump(fwrt); - - /* start recording again if the firmware is not crashed */ - if (!test_bit(STATUS_FW_ERROR, &fwrt->trans->status) && - fwrt->fw->dbg_dest_tlv) { - iwl_clear_bits_prph(fwrt->trans, - MON_BUFF_SAMPLE_CTL, 0x100); - iwl_clear_bits_prph(fwrt->trans, - MON_BUFF_SAMPLE_CTL, 0x1); - iwl_set_bits_prph(fwrt->trans, - MON_BUFF_SAMPLE_CTL, 0x1); - } - } else { - u32 in_sample = iwl_read_prph(fwrt->trans, DBGC_IN_SAMPLE); - u32 out_ctrl = iwl_read_prph(fwrt->trans, DBGC_OUT_CTRL); + iwl_fw_dbg_stop_recording(fwrt->trans, ¶ms); + + iwl_fw_error_dump(fwrt); - iwl_fw_dbg_stop_recording(fwrt->trans); + /* start recording again if the firmware is not crashed */ + if (!test_bit(STATUS_FW_ERROR, &fwrt->trans->status) && + fwrt->fw->dbg_dest_tlv) { /* wait before we collect the data till the DBGC stop */ udelay(500); - - iwl_fw_error_dump(fwrt); - - /* start recording again if the firmware is not crashed */ - if (!test_bit(STATUS_FW_ERROR, &fwrt->trans->status) && - fwrt->fw->dbg_dest_tlv) { - iwl_write_prph(fwrt->trans, DBGC_IN_SAMPLE, in_sample); - iwl_write_prph(fwrt->trans, DBGC_OUT_CTRL, out_ctrl); - } + iwl_fw_dbg_restart_recording(fwrt->trans, ¶ms); } out: if (fwrt->ops && fwrt->ops->dump_end) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h index d04e68104ded..878758b6c7ae 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h @@ -83,6 +83,16 @@ struct iwl_fw_dump_desc { struct iwl_fw_error_dump_trigger_desc trig_desc; }; +/** + * struct iwl_fw_dbg_params - register values to restore + * @in_sample: DBGC_IN_SAMPLE value + * @out_ctrl: DBGC_OUT_CTRL value + */ +struct iwl_fw_dbg_params { + u32 in_sample; + u32 out_ctrl; +}; + extern const struct iwl_fw_dump_desc iwl_dump_desc_assert; static inline void iwl_fw_free_dump_desc(struct iwl_fw_runtime *fwrt) @@ -196,14 +206,40 @@ _iwl_fw_dbg_trigger_simple_stop(struct iwl_fw_runtime *fwrt, iwl_fw_dbg_get_trigger((fwrt)->fw,\ (trig))) -static inline void iwl_fw_dbg_stop_recording(struct iwl_trans *trans) +static inline void +iwl_fw_dbg_stop_recording(struct iwl_trans *trans, + struct iwl_fw_dbg_params *params) { if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) { iwl_set_bits_prph(trans, MON_BUFF_SAMPLE_CTL, 0x100); + return; + } + + if (params) { + params->in_sample = iwl_read_prph(trans, DBGC_IN_SAMPLE); + params->out_ctrl = iwl_read_prph(trans, DBGC_OUT_CTRL); + } + + iwl_write_prph(trans, DBGC_IN_SAMPLE, 0); + udelay(100); + iwl_write_prph(trans, DBGC_OUT_CTRL, 0); +} + +static inline void +iwl_fw_dbg_restart_recording(struct iwl_trans *trans, + struct iwl_fw_dbg_params *params) +{ + if (WARN_ON(!params)) + return; + + if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) { + iwl_clear_bits_prph(trans, MON_BUFF_SAMPLE_CTL, 0x100); + iwl_clear_bits_prph(trans, MON_BUFF_SAMPLE_CTL, 0x1); + iwl_set_bits_prph(trans, MON_BUFF_SAMPLE_CTL, 0x1); } else { - iwl_write_prph(trans, DBGC_IN_SAMPLE, 0); + iwl_write_prph(trans, DBGC_IN_SAMPLE, params->in_sample); udelay(100); - iwl_write_prph(trans, DBGC_OUT_CTRL, 0); + iwl_write_prph(trans, DBGC_OUT_CTRL, params->out_ctrl); } } diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c index 99050c8dd432..5305342439b2 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c @@ -1042,7 +1042,7 @@ static int __iwl_mvm_suspend(struct ieee80211_hw *hw, * the recording automatically before entering D3. This can * be removed once the FW starts doing that. */ - iwl_fw_dbg_stop_recording(mvm->fwrt.trans); + iwl_fw_dbg_stop_recording(mvm->fwrt.trans, NULL); /* must be last -- this switches firmware state */ ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd); diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c index 5f61b02e651e..b5902c74e5d0 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c @@ -165,7 +165,7 @@ void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans, bool low_power) trans_pcie->is_down = true; /* Stop dbgc before stopping device */ - iwl_fw_dbg_stop_recording(trans); + iwl_fw_dbg_stop_recording(trans, NULL); /* tell the device to stop sending interrupts */ iwl_disable_interrupts(trans); diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index cc8c53dc0ab6..5ecd5c8d0f02 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1243,7 +1243,7 @@ static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power) trans_pcie->is_down = true; /* Stop dbgc before stopping device */ - iwl_fw_dbg_stop_recording(trans); + iwl_fw_dbg_stop_recording(trans, NULL); /* tell the device to stop sending interrupts */ iwl_disable_interrupts(trans);