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iwlwifi: trans: divide stop_hw into stop_device/op_mode_leave 

The stop_hw trans callback is not well defined. It is missing in many
cleanup flows and the division of labor between stop_device/stop_hw
is cumbersome. Remove stop_hw and use stop_device to perform both.
Implement this for all current transports.

PCIE needs some extra configuration the op-mode is leaving to configure
RF kill. Expose this explicitly as a new op_mode_leave trans callback.
Take the call to stop_device outside iwl_run_mvm_init_ucode, this
makes more sense and WARN when we want to run the INIT firmware while
it has run already.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Arik Nemtsov 2013-11-24 19:10:46 +02:00 committed by Emmanuel Grumbach
parent 8b206d198c
commit a408284367
8 changed files with 55 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/wireless/iwlwifi/dvm/mac80211.c
View File

@ -322,12 +322,6 @@ static void iwlagn_mac_stop(struct ieee80211_hw *hw)
flush_workqueue(priv->workqueue);
/* User space software may expect getting rfkill changes
* even if interface is down, trans->down will leave the RF
* kill interrupt enabled
*/
iwl_trans_stop_hw(priv->trans, false);
IWL_DEBUG_MAC80211(priv, "leave\n");
}

4
drivers/net/wireless/iwlwifi/dvm/main.c
View File

@ -1313,7 +1313,7 @@ static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
}
/* Reset chip to save power until we load uCode during "up". */
iwl_trans_stop_hw(priv->trans, false);
iwl_trans_stop_device(priv->trans);
priv->nvm_data = iwl_parse_eeprom_data(priv->trans->dev, priv->cfg,
priv->eeprom_blob,
@ -1458,7 +1458,7 @@ static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
dev_kfree_skb(priv->beacon_skb);
iwl_trans_stop_hw(priv->trans, true);
iwl_trans_op_mode_leave(priv->trans);
ieee80211_free_hw(priv->hw);
}

25
drivers/net/wireless/iwlwifi/iwl-trans.h
View File

@ -100,8 +100,7 @@
* start_fw
*
* 5) Then when finished (or reset):
* stop_fw (a.k.a. stop device for the moment)
* stop_hw
* stop_device
*
* 6) Eventually, the free function will be called.
*/
@ -361,9 +360,7 @@ struct iwl_trans;
*
* @start_hw: starts the HW- from that point on, the HW can send interrupts
* May sleep
* @stop_hw: stops the HW- from that point on, the HW will be in low power but
* will still issue interrupt if the HW RF kill is triggered unless
* op_mode_leaving is true.
* @op_mode_leave: Turn off the HW RF kill indication if on
* May sleep
* @start_fw: allocates and inits all the resources for the transport
* layer. Also kick a fw image.
@ -371,8 +368,11 @@ struct iwl_trans;
* @fw_alive: called when the fw sends alive notification. If the fw provides
* the SCD base address in SRAM, then provide it here, or 0 otherwise.
* May sleep
* @stop_device:stops the whole device (embedded CPU put to reset)
* May sleep
* @stop_device: stops the whole device (embedded CPU put to reset) and stops
* the HW. From that point on, the HW will be in low power but will still
* issue interrupt if the HW RF kill is triggered. This callback must do
* the right thing and not crash even if start_hw() was called but not
* start_fw(). May sleep
* @d3_suspend: put the device into the correct mode for WoWLAN during
* suspend. This is optional, if not implemented WoWLAN will not be
* supported. This callback may sleep.
@ -418,7 +418,7 @@ struct iwl_trans;
struct iwl_trans_ops {
int (*start_hw)(struct iwl_trans *iwl_trans);
void (*stop_hw)(struct iwl_trans *iwl_trans, bool op_mode_leaving);
void (*op_mode_leave)(struct iwl_trans *iwl_trans);
int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
bool run_in_rfkill);
void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
@ -540,15 +540,14 @@ static inline int iwl_trans_start_hw(struct iwl_trans *trans)
return trans->ops->start_hw(trans);
}
static inline void iwl_trans_stop_hw(struct iwl_trans *trans,
bool op_mode_leaving)
static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans)
{
might_sleep();
trans->ops->stop_hw(trans, op_mode_leaving);
if (trans->ops->op_mode_leave)
trans->ops->op_mode_leave(trans);
if (op_mode_leaving)
trans->op_mode = NULL;
trans->op_mode = NULL;
trans->state = IWL_TRANS_NO_FW;
}

24
drivers/net/wireless/iwlwifi/mvm/fw.c
View File

@ -241,7 +241,7 @@ int iwl_run_init_mvm_ucode(struct iwl_mvm *mvm, bool read_nvm)
lockdep_assert_held(&mvm->mutex);
if (mvm->init_ucode_complete)
if (WARN_ON_ONCE(mvm->init_ucode_complete))
return 0;
iwl_init_notification_wait(&mvm->notif_wait,
@ -287,7 +287,8 @@ int iwl_run_init_mvm_ucode(struct iwl_mvm *mvm, bool read_nvm)
IWL_DEBUG_RF_KILL(mvm,
"jump over all phy activities due to RF kill\n");
iwl_remove_notification(&mvm->notif_wait, &calib_wait);
return 1;
ret = 1;
goto out;
}
/* Send TX valid antennas before triggering calibrations */
@ -319,9 +320,7 @@ int iwl_run_init_mvm_ucode(struct iwl_mvm *mvm, bool read_nvm)
error:
iwl_remove_notification(&mvm->notif_wait, &calib_wait);
out:
if (!iwlmvm_mod_params.init_dbg) {
iwl_trans_stop_device(mvm->trans);
} else if (!mvm->nvm_data) {
if (iwlmvm_mod_params.init_dbg && !mvm->nvm_data) {
/* we want to debug INIT and we have no NVM - fake */
mvm->nvm_data = kzalloc(sizeof(struct iwl_nvm_data) +
sizeof(struct ieee80211_channel) +
@ -370,11 +369,16 @@ int iwl_mvm_up(struct iwl_mvm *mvm)
ret = -ERFKILL;
goto error;
}
/* should stop & start HW since that INIT image just loaded */
iwl_trans_stop_hw(mvm->trans, false);
ret = iwl_trans_start_hw(mvm->trans);
if (ret)
return ret;
if (!iwlmvm_mod_params.init_dbg) {
/*
* should stop and start HW since that INIT
* image just loaded
*/
iwl_trans_stop_device(mvm->trans);
ret = iwl_trans_start_hw(mvm->trans);
if (ret)
return ret;
}
}
if (iwlmvm_mod_params.init_dbg)

2
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -405,7 +405,6 @@ static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
iwl_trans_stop_device(mvm->trans);
iwl_trans_stop_hw(mvm->trans, false);
mvm->scan_status = IWL_MVM_SCAN_NONE;
@ -477,7 +476,6 @@ static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
cancel_work_sync(&mvm->roc_done_wk);
iwl_trans_stop_device(mvm->trans);
iwl_trans_stop_hw(mvm->trans, false);
iwl_mvm_async_handlers_purge(mvm);
/* async_handlers_list is empty and will stay empty: HW is stopped */

9
drivers/net/wireless/iwlwifi/mvm/ops.c
View File

@ -436,16 +436,13 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
mutex_lock(&mvm->mutex);
err = iwl_run_init_mvm_ucode(mvm, true);
iwl_trans_stop_device(trans);
mutex_unlock(&mvm->mutex);
/* returns 0 if successful, 1 if success but in rfkill */
if (err < 0 && !iwlmvm_mod_params.init_dbg) {
IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
goto out_free;
}
/* Stop the hw after the ALIVE and NVM has been read */
if (!iwlmvm_mod_params.init_dbg)
iwl_trans_stop_hw(mvm->trans, false);
}
scan_size = sizeof(struct iwl_scan_cmd) +
@ -478,7 +475,7 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
iwl_phy_db_free(mvm->phy_db);
kfree(mvm->scan_cmd);
if (!iwlwifi_mod_params.nvm_file)
iwl_trans_stop_hw(trans, true);
iwl_trans_op_mode_leave(trans);
ieee80211_free_hw(mvm->hw);
return NULL;
}
@ -502,7 +499,7 @@ static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
kfree(mvm->d3_resume_sram);
#endif
iwl_trans_stop_hw(mvm->trans, true);
iwl_trans_op_mode_leave(mvm->trans);
iwl_phy_db_free(mvm->phy_db);
mvm->phy_db = NULL;

2
drivers/net/wireless/iwlwifi/mvm/tt.c
View File

@ -340,7 +340,7 @@ static void check_exit_ctkill(struct work_struct *work)
iwl_trans_start_hw(mvm->trans);
temp = check_nic_temperature(mvm);
iwl_trans_stop_hw(mvm->trans, false);
iwl_trans_stop_device(mvm->trans);
if (temp < MIN_TEMPERATURE || temp > MAX_TEMPERATURE) {
IWL_DEBUG_TEMP(mvm, "Failed to measure NIC temperature\n");

50
drivers/net/wireless/iwlwifi/pcie/trans.c
View File

@ -641,6 +641,7 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
unsigned long flags;
bool hw_rfkill;
/* tell the device to stop sending interrupts */
spin_lock_irqsave(&trans_pcie->irq_lock, flags);
@ -681,8 +682,6 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
iwl_disable_interrupts(trans);
spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
iwl_enable_rfkill_int(trans);
/* stop and reset the on-board processor */
iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
@ -692,6 +691,25 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
clear_bit(STATUS_DEVICE_ENABLED, &trans_pcie->status);
clear_bit(STATUS_TPOWER_PMI, &trans_pcie->status);
clear_bit(STATUS_RFKILL, &trans_pcie->status);
/*
* Even if we stop the HW, we still want the RF kill
* interrupt
*/
iwl_enable_rfkill_int(trans);
/*
* Check again since the RF kill state may have changed while
* all the interrupts were disabled, in this case we couldn't
* receive the RF kill interrupt and update the state in the
* op_mode.
*/
hw_rfkill = iwl_is_rfkill_set(trans);
if (hw_rfkill)
set_bit(STATUS_RFKILL, &trans_pcie->status);
else
clear_bit(STATUS_RFKILL, &trans_pcie->status);
iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill);
}
static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test)
@ -806,13 +824,12 @@ static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
return 0;
}
static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans,
bool op_mode_leaving)
static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
bool hw_rfkill;
unsigned long flags;
/* disable interrupts - don't enable HW RF kill interrupt */
spin_lock_irqsave(&trans_pcie->irq_lock, flags);
iwl_disable_interrupts(trans);
spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
@ -824,27 +841,6 @@ static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans,
spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
iwl_pcie_disable_ict(trans);
if (!op_mode_leaving) {
/*
* Even if we stop the HW, we still want the RF kill
* interrupt
*/
iwl_enable_rfkill_int(trans);
/*
* Check again since the RF kill state may have changed while
* all the interrupts were disabled, in this case we couldn't
* receive the RF kill interrupt and update the state in the
* op_mode.
*/
hw_rfkill = iwl_is_rfkill_set(trans);
if (hw_rfkill)
set_bit(STATUS_RFKILL, &trans_pcie->status);
else
clear_bit(STATUS_RFKILL, &trans_pcie->status);
iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill);
}
}
static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
@ -1457,7 +1453,7 @@ static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
static const struct iwl_trans_ops trans_ops_pcie = {
.start_hw = iwl_trans_pcie_start_hw,
.stop_hw = iwl_trans_pcie_stop_hw,
.op_mode_leave = iwl_trans_pcie_op_mode_leave,
.fw_alive = iwl_trans_pcie_fw_alive,
.start_fw = iwl_trans_pcie_start_fw,
.stop_device = iwl_trans_pcie_stop_device,