diff options
| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-11-24 13:24:24 +0200 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-12-13 08:52:52 +0200 |
| commit | 0cd58eaab1482ab75800f68cd0033286232827f1 (patch) | |
| tree | e16105c724436a3570207218b0e5977e4915c6f6 /drivers/net/wireless/intel/iwlwifi/pcie | |
| parent | 3f50a69077b5b8086fd16cfa0b71138082126a69 (diff) | |
| download | linux-0cd58eaab1482ab75800f68cd0033286232827f1.tar.gz | |
iwlwifi: pcie: allow the op_mode to block the tx queues
In certain flows (see next patches), the op_mode may need to
block the Tx queues for a short period. Provide an API for
that. The transport is in charge of counting the number of
times the queues are blocked since the op_mode may block the
queues several times in a row before unblocking them.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/internal.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 28 | ||||
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 4 |
3 files changed, 32 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h index 44dc09d84d42..31f30a2dd654 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h @@ -278,6 +278,7 @@ struct iwl_txq { bool frozen; u8 active; bool ampdu; + bool block; unsigned long wd_timeout; }; diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index efef4871478d..316162a45989 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1673,6 +1673,33 @@ next_queue: } } +static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + int i; + + for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) { + struct iwl_txq *txq = &trans_pcie->txq[i]; + + if (i == trans_pcie->cmd_queue) + continue; + + spin_lock_bh(&txq->lock); + + if (!block && !(WARN_ON_ONCE(!txq->block))) { + txq->block--; + if (!txq->block) { + iwl_write32(trans, HBUS_TARG_WRPTR, + txq->q.write_ptr | (i << 8)); + } + } else if (block) { + txq->block++; + } + + spin_unlock_bh(&txq->lock); + } +} + #define IWL_FLUSH_WAIT_MS 2000 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm) @@ -2467,6 +2494,7 @@ static const struct iwl_trans_ops trans_ops_pcie = { .wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty, .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer, + .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs, .write8 = iwl_trans_pcie_write8, .write32 = iwl_trans_pcie_write32, diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c index a8c8a4a7420b..95ba920edb1d 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c @@ -318,7 +318,9 @@ static void iwl_pcie_txq_inc_wr_ptr(struct iwl_trans *trans, * trying to tx (during RFKILL, we're not trying to tx). */ IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq_id, txq->q.write_ptr); - iwl_write32(trans, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8)); + if (!txq->block) + iwl_write32(trans, HBUS_TARG_WRPTR, + txq->q.write_ptr | (txq_id << 8)); } void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans) |