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| 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/iwl-trans.h | |
| parent | 3f50a69077b5b8086fd16cfa0b71138082126a69 (diff) | |
| download | linux-0cd58eaab1482ab75800f68cd0033286232827f1.tar.bz2 | |
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/iwl-trans.h')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/iwl-trans.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h index 3d089ae171b7..0cd69cd98cd6 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h @@ -542,6 +542,11 @@ struct iwl_trans_txq_scd_cfg { * @wait_tx_queue_empty: wait until tx queues are empty. May sleep. * @freeze_txq_timer: prevents the timer of the queue from firing until the * queue is set to awake. Must be atomic. + * @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note + * that the transport needs to refcount the calls since this function + * will be called several times with block = true, and then the queues + * need to be unblocked only after the same number of calls with + * block = false. * @write8: write a u8 to a register at offset ofs from the BAR * @write32: write a u32 to a register at offset ofs from the BAR * @read32: read a u32 register at offset ofs from the BAR @@ -600,6 +605,7 @@ struct iwl_trans_ops { int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm); void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs, bool freeze); + void (*block_txq_ptrs)(struct iwl_trans *trans, bool block); void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val); void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val); @@ -1010,6 +1016,16 @@ static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans, trans->ops->freeze_txq_timer(trans, txqs, freeze); } +static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans, + bool block) +{ + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + + if (trans->ops->block_txq_ptrs) + trans->ops->block_txq_ptrs(trans, block); +} + static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans, u32 txqs) { |