From: Johannes Berg Date: Tue, 8 Jan 2013 23:47:07 +0000 (+0100) Subject: iwlwifi: simplify scheduler memory clearing X-Git-Tag: accepted/tizen/common/20141203.182822~2684^2~28^2^2~68 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=22dc3c9561825a7c2cd18d01b01358c2141a8e16;p=platform%2Fkernel%2Flinux-arm64.git iwlwifi: simplify scheduler memory clearing Writing 130 dwords into the device one by one is rather inefficient, every one needs to lock, grab NIC access (a few register reads/writes) and then write the address and data registers. Use the new memory clearing function to make this easier and faster. Reviewed-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c index 3ff3e8b..d3c4e8f 100644 --- a/drivers/net/wireless/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/iwlwifi/pcie/tx.c @@ -641,9 +641,11 @@ static void iwl_pcie_txq_set_sched(struct iwl_trans *trans, u32 mask) void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - u32 a; + int nq = trans->cfg->base_params->num_of_queues; int chan; u32 reg_val; + int clear_dwords = (SCD_TRANS_TBL_OFFSET_QUEUE(nq) - + SCD_CONTEXT_MEM_LOWER_BOUND) / sizeof(u32); /* make sure all queue are not stopped/used */ memset(trans_pcie->queue_stopped, 0, sizeof(trans_pcie->queue_stopped)); @@ -655,20 +657,10 @@ void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr) WARN_ON(scd_base_addr != 0 && scd_base_addr != trans_pcie->scd_base_addr); - a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND; - /* reset conext data memory */ - for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND; - a += 4) - iwl_trans_write_mem32(trans, a, 0); - /* reset tx status memory */ - for (; a < trans_pcie->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND; - a += 4) - iwl_trans_write_mem32(trans, a, 0); - for (; a < trans_pcie->scd_base_addr + - SCD_TRANS_TBL_OFFSET_QUEUE( - trans->cfg->base_params->num_of_queues); - a += 4) - iwl_trans_write_mem32(trans, a, 0); + /* reset context data, TX status and translation data */ + iwl_trans_write_mem(trans, trans_pcie->scd_base_addr + + SCD_CONTEXT_MEM_LOWER_BOUND, + NULL, clear_dwords); iwl_write_prph(trans, SCD_DRAM_BASE_ADDR, trans_pcie->scd_bc_tbls.dma >> 10);