From e22744af3b79c42478888b20a063384f5349a21d Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Wed, 22 Jun 2016 17:23:34 +0300 Subject: [PATCH] iwlwifi: pcie: initialize a000 device's TFD table For a000 device the FH was replaced by the TFH. This is the first patch in a series introducing the changes stemming from this change. This patch initializes the TFQ queue table with the new 64 bit register and the relevant TFH configuration registers. Signed-off-by: Sara Sharon Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/iwl-a000.c | 3 +- .../net/wireless/intel/iwlwifi/iwl-config.h | 3 +- drivers/net/wireless/intel/iwlwifi/iwl-fh.h | 40 ++++++++++++++++++- drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 27 ++++++++++--- 4 files changed, 65 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-a000.c b/drivers/net/wireless/intel/iwlwifi/iwl-a000.c index 220767e02734..4d78232c8afe 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-a000.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-a000.c @@ -115,7 +115,8 @@ static const struct iwl_ht_params iwl_a000_ht_params = { .apmg_not_supported = true, \ .mq_rx_supported = true, \ .vht_mu_mimo_supported = true, \ - .mac_addr_from_csr = true + .mac_addr_from_csr = true, \ + .use_tfh = true const struct iwl_cfg iwla000_2ac_cfg = { .name = "Intel(R) Dual Band Wireless AC a000", diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-config.h b/drivers/net/wireless/intel/iwlwifi/iwl-config.h index 64108cc975cf..423b23320d4f 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-config.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-config.h @@ -365,7 +365,8 @@ struct iwl_cfg { mq_rx_supported:1, vht_mu_mimo_supported:1, rf_id:1, - integrated:1; + integrated:1, + use_tfh:1; u8 valid_tx_ant; u8 valid_rx_ant; u8 non_shared_ant; diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h index 73f0ed88b20b..3b7346797c8a 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h @@ -77,6 +77,7 @@ */ #define FH_MEM_LOWER_BOUND (0x1000) #define FH_MEM_UPPER_BOUND (0x2000) +#define TFH_MEM_LOWER_BOUND (0xA06000) /** * Keep-Warm (KW) buffer base address. @@ -118,10 +119,17 @@ #define FH_MEM_CBBC_16_19_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00) #define FH_MEM_CBBC_20_31_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xB20) #define FH_MEM_CBBC_20_31_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xB80) +/* a000 TFD table address, 64 bit */ +#define TFH_TFDQ_CBB_TABLE (TFH_MEM_LOWER_BOUND + 0x1C00) /* Find TFD CB base pointer for given queue */ -static inline unsigned int FH_MEM_CBBC_QUEUE(unsigned int chnl) +static inline unsigned int FH_MEM_CBBC_QUEUE(struct iwl_trans *trans, + unsigned int chnl) { + if (trans->cfg->use_tfh) { + WARN_ON_ONCE(chnl >= 64); + return TFH_TFDQ_CBB_TABLE + 8 * chnl; + } if (chnl < 16) return FH_MEM_CBBC_0_15_LOWER_BOUND + 4 * chnl; if (chnl < 20) @@ -130,6 +138,36 @@ static inline unsigned int FH_MEM_CBBC_QUEUE(unsigned int chnl) return FH_MEM_CBBC_20_31_LOWER_BOUND + 4 * (chnl - 20); } +/* a000 configuration registers */ + +/* + * TFH Configuration register. + * + * BIT fields: + * + * Bits 3:0: + * Define the maximum number of pending read requests. + * Maximum configration value allowed is 0xC + * Bits 9:8: + * Define the maximum transfer size. (64 / 128 / 256) + * Bit 10: + * When bit is set and transfer size is set to 128B, the TFH will enable + * reading chunks of more than 64B only if the read address is aligned to 128B. + * In case of DRAM read address which is not aligned to 128B, the TFH will + * enable transfer size which doesn't cross 64B DRAM address boundary. +*/ +#define TFH_TRANSFER_MODE (TFH_MEM_LOWER_BOUND + 0x1F40) +#define TFH_TRANSFER_MAX_PENDING_REQ 0xc +#define TFH_CHUNK_SIZE_128 BIT(8) +#define TFH_CHUNK_SPLIT_MODE BIT(10) +/* + * Defines the offset address in dwords referring from the beginning of the + * Tx CMD which will be updated in DRAM. + * Note that the TFH offset address for Tx CMD update is always referring to + * the start of the TFD first TB. + * In case of a DRAM Tx CMD update the TFH will update PN and Key ID + */ +#define TFH_TXCMD_UPDATE_CFG (TFH_MEM_LOWER_BOUND + 0x1F48) /** * Rx SRAM Control and Status Registers (RSCSR) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c index 9a1c00623247..d88d64c92e25 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c @@ -70,6 +70,7 @@ * Tx queue resumed. * ***************************************************/ + static int iwl_queue_space(const struct iwl_queue *q) { unsigned int max; @@ -575,8 +576,13 @@ static int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, * Tell nic where to find circular buffer of Tx Frame Descriptors for * given Tx queue, and enable the DMA channel used for that queue. * Circular buffer (TFD queue in DRAM) physical base address */ - iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id), - txq->q.dma_addr >> 8); + if (trans->cfg->use_tfh) + iwl_write_direct64(trans, + FH_MEM_CBBC_QUEUE(trans, txq_id), + txq->q.dma_addr); + else + iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(trans, txq_id), + txq->q.dma_addr >> 8); return 0; } @@ -783,9 +789,14 @@ void iwl_trans_pcie_tx_reset(struct iwl_trans *trans) for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; txq_id++) { struct iwl_txq *txq = &trans_pcie->txq[txq_id]; - - iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id), - txq->q.dma_addr >> 8); + if (trans->cfg->use_tfh) + iwl_write_direct64(trans, + FH_MEM_CBBC_QUEUE(trans, txq_id), + txq->q.dma_addr); + else + iwl_write_direct32(trans, + FH_MEM_CBBC_QUEUE(trans, txq_id), + txq->q.dma_addr >> 8); iwl_pcie_txq_unmap(trans, txq_id); txq->q.read_ptr = 0; txq->q.write_ptr = 0; @@ -993,6 +1004,12 @@ int iwl_pcie_tx_init(struct iwl_trans *trans) } } + if (trans->cfg->use_tfh) + iwl_write_direct32(trans, TFH_TRANSFER_MODE, + TFH_TRANSFER_MAX_PENDING_REQ | + TFH_CHUNK_SIZE_128 | + TFH_CHUNK_SPLIT_MODE); + iwl_set_bits_prph(trans, SCD_GP_CTRL, SCD_GP_CTRL_AUTO_ACTIVE_MODE); if (trans->cfg->base_params->num_of_queues > 20) iwl_set_bits_prph(trans, SCD_GP_CTRL, -- 2.39.5