From: Sara Sharon <sara.sharon@xxxxxxxxx> 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@xxxxxxxxx> Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/iwl-fh.h | 3 +++ 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 582008a..270f39e 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 89f87f7..3477821 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 -- 2.8.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
