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iwlwifi: pcie: refactor cmd_in_flight set/clear code

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A following patche will use trans_pcie->cmd_in_flight
for reference accounting as well. get ready for it.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Eliad Peller 2014-11-20 14:36:26 +02:00 committed by Emmanuel Grumbach
parent 160acc0e8d
commit 804d4c5a81
1 changed files with 66 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
drivers/net/wireless/iwlwifi/pcie/tx.c
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@ -989,6 +989,65 @@ void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
spin_unlock_bh(&txq->lock);
}
static int iwl_pcie_set_cmd_in_flight(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int ret;
lockdep_assert_held(&trans_pcie->reg_lock);
if (trans_pcie->cmd_in_flight)
return 0;
trans_pcie->cmd_in_flight = true;
/*
* wake up the NIC to make sure that the firmware will see the host
* command - we will let the NIC sleep once all the host commands
* returned. This needs to be done only on NICs that have
* apmg_wake_up_wa set.
*/
if (trans->cfg->base_params->apmg_wake_up_wa) {
__iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
udelay(2);
ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
(CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP),
15000);
if (ret < 0) {
__iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
trans_pcie->cmd_in_flight = false;
IWL_ERR(trans, "Failed to wake NIC for hcmd\n");
return -EIO;
}
}
return 0;
}
static int iwl_pcie_clear_cmd_in_flight(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
lockdep_assert_held(&trans_pcie->reg_lock);
if (WARN_ON(!trans_pcie->cmd_in_flight))
return 0;
trans_pcie->cmd_in_flight = false;
if (trans->cfg->base_params->apmg_wake_up_wa)
__iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
return 0;
}
/*
* iwl_pcie_cmdq_reclaim - Reclaim TX command queue entries already Tx'd
*
@ -1024,14 +1083,9 @@ static void iwl_pcie_cmdq_reclaim(struct iwl_trans *trans, int txq_id, int idx)
}
}
if (trans->cfg->base_params->apmg_wake_up_wa &&
q->read_ptr == q->write_ptr) {
if (q->read_ptr == q->write_ptr) {
spin_lock_irqsave(&trans_pcie->reg_lock, flags);
WARN_ON(!trans_pcie->cmd_in_flight);
trans_pcie->cmd_in_flight = false;
__iwl_trans_pcie_clear_bit(trans,
CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
iwl_pcie_clear_cmd_in_flight(trans);
spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
}
@ -1419,35 +1473,11 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
mod_timer(&txq->stuck_timer, jiffies + trans_pcie->wd_timeout);
spin_lock_irqsave(&trans_pcie->reg_lock, flags);
/*
* wake up the NIC to make sure that the firmware will see the host
* command - we will let the NIC sleep once all the host commands
* returned. This needs to be done only on NICs that have
* apmg_wake_up_wa set.
*/
if (trans->cfg->base_params->apmg_wake_up_wa &&
!trans_pcie->cmd_in_flight) {
trans_pcie->cmd_in_flight = true;
__iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
udelay(2);
ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
(CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP),
15000);
if (ret < 0) {
__iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
trans_pcie->cmd_in_flight = false;
IWL_ERR(trans, "Failed to wake NIC for hcmd\n");
idx = -EIO;
goto out;
}
ret = iwl_pcie_set_cmd_in_flight(trans);
if (ret < 0) {
idx = ret;
spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
goto out;
}
/* Increment and update queue's write index */