diff options
| author | Sara Sharon <sara.sharon@intel.com> | 2016-04-17 15:08:59 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2016-05-10 22:34:09 +0300 |
| commit | 1554ed20882798b1da3d9830b0d996a0bc1aaecd (patch) | |
| tree | a3b01f8f8aea476448f056452bd42e7c837682c6 /drivers/net | |
| parent | cf961e16620f88686e0662753bd92d8383f36862 (diff) | |
iwlwifi: pcie: use shadow registers for updating write pointer
The RX queues have a shadow register for the write pointer
that enables updates without grabbing NIC access. Use them
instead of the periphery registers because accessing those
is much more expensive.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/iwl-fh.h | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h index 582008a66069..270f39ecd2d4 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h @@ -321,6 +321,9 @@ static inline unsigned int FH_MEM_CBBC_QUEUE(unsigned int chnl) /* Write index table */ #define RFH_Q0_FRBDCB_WIDX 0xA08080 #define RFH_Q_FRBDCB_WIDX(q) (RFH_Q0_FRBDCB_WIDX + (q) * 4) +/* Write index table - shadow registers */ +#define RFH_Q0_FRBDCB_WIDX_TRG 0x1C80 +#define RFH_Q_FRBDCB_WIDX_TRG(q) (RFH_Q0_FRBDCB_WIDX_TRG + (q) * 4) /* Read index table */ #define RFH_Q0_FRBDCB_RIDX 0xA080C0 #define RFH_Q_FRBDCB_RIDX(q) (RFH_Q0_FRBDCB_RIDX + (q) * 4) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index 89f87f7fb0d6..347782157407 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -208,8 +208,8 @@ static void iwl_pcie_rxq_inc_wr_ptr(struct iwl_trans *trans, rxq->write_actual = round_down(rxq->write, 8); if (trans->cfg->mq_rx_supported) - iwl_write_prph(trans, RFH_Q_FRBDCB_WIDX(rxq->id), - rxq->write_actual); + iwl_write32(trans, RFH_Q_FRBDCB_WIDX_TRG(rxq->id), + rxq->write_actual); /* * write to FH_RSCSR_CHNL0_WPTR register even in MQ as a W/A to * hardware shadow registers bug - writing to RFH_Q_FRBDCB_WIDX will |