From 6c4fbcbc1c954d61711e3761a05283e980a6106e Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Tue, 10 Nov 2015 11:57:41 +0200 Subject: [PATCH] iwlwifi: add support for 12K Receive Buffers 802.11ac allows A-MSDU that can be up to 12KB long. Since an entire A-MSDU needs to fit into one single Receive Buffer (RB), add support for big RBs. Since this adds lots of pressure to the memory manager and significantly increase the true_size of the RX buffers, don't enable this by default. Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/intel/iwlwifi/dvm/main.c | 16 ++++++++++++++- drivers/net/wireless/intel/iwlwifi/iwl-drv.c | 4 ++-- .../wireless/intel/iwlwifi/iwl-eeprom-parse.c | 2 +- .../wireless/intel/iwlwifi/iwl-modparams.h | 10 ++++++++-- .../wireless/intel/iwlwifi/iwl-nvm-parse.c | 13 +++++++++++- .../net/wireless/intel/iwlwifi/iwl-trans.h | 20 +++++++++++++++++-- drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 16 ++++++++++++++- .../wireless/intel/iwlwifi/pcie/internal.h | 4 ++-- drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 16 ++++++++++++--- .../net/wireless/intel/iwlwifi/pcie/trans.c | 8 +++----- 10 files changed, 89 insertions(+), 20 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/main.c b/drivers/net/wireless/intel/iwlwifi/dvm/main.c index e7616f0ee6e8..41f3aa17475e 100644 --- a/drivers/net/wireless/intel/iwlwifi/dvm/main.c +++ b/drivers/net/wireless/intel/iwlwifi/dvm/main.c @@ -1227,7 +1227,21 @@ static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans, trans_cfg.op_mode = op_mode; trans_cfg.no_reclaim_cmds = no_reclaim_cmds; trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds); - trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K; + + switch (iwlwifi_mod_params.amsdu_size) { + case IWL_AMSDU_4K: + trans_cfg.rx_buf_size = IWL_AMSDU_4K; + break; + case IWL_AMSDU_8K: + trans_cfg.rx_buf_size = IWL_AMSDU_8K; + break; + case IWL_AMSDU_12K: + default: + trans_cfg.rx_buf_size = IWL_AMSDU_4K; + pr_err("Unsupported amsdu_size: %d\n", + iwlwifi_mod_params.amsdu_size); + } + trans_cfg.cmd_q_wdg_timeout = IWL_WATCHDOG_DISABLED; trans_cfg.command_names = iwl_dvm_cmd_strings; diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c index 463cadfbfccb..48f090af19db 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c @@ -1637,9 +1637,9 @@ MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); module_param_named(11n_disable, iwlwifi_mod_params.disable_11n, uint, S_IRUGO); MODULE_PARM_DESC(11n_disable, "disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX"); -module_param_named(amsdu_size_8K, iwlwifi_mod_params.amsdu_size_8K, +module_param_named(amsdu_size, iwlwifi_mod_params.amsdu_size, int, S_IRUGO); -MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0)"); +MODULE_PARM_DESC(amsdu_size, "amsdu size 0:4K 1:8K 2:12K (default 0)"); module_param_named(fw_restart, iwlwifi_mod_params.restart_fw, bool, S_IRUGO); MODULE_PARM_DESC(fw_restart, "restart firmware in case of error (default true)"); diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c index acc3d186c5c1..a19c4582936f 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c @@ -766,7 +766,7 @@ void iwl_init_ht_hw_capab(const struct iwl_cfg *cfg, if (cfg->ht_params->ldpc) ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING; - if (iwlwifi_mod_params.amsdu_size_8K) + if (iwlwifi_mod_params.amsdu_size >= IWL_AMSDU_8K) ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU; ht_info->ampdu_factor = cfg->max_ht_ampdu_exponent; diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h b/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h index ac2b90df8413..3436c0066e84 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h @@ -86,6 +86,12 @@ enum iwl_disable_11n { IWL_ENABLE_HT_TXAGG = BIT(3), }; +enum iwl_amsdu_size { + IWL_AMSDU_4K = 0, + IWL_AMSDU_8K = 1, + IWL_AMSDU_12K = 2, +}; + /** * struct iwl_mod_params * @@ -94,7 +100,7 @@ enum iwl_disable_11n { * @sw_crypto: using hardware encryption, default = 0 * @disable_11n: disable 11n capabilities, default = 0, * use IWL_[DIS,EN]ABLE_HT_* constants - * @amsdu_size_8K: enable 8K amsdu size, default = 0 + * @amsdu_size: enable 8K amsdu size, default = 4K. enum iwl_amsdu_size. * @restart_fw: restart firmware, default = 1 * @bt_coex_active: enable bt coex, default = true * @led_mode: system default, default = 0 @@ -109,7 +115,7 @@ enum iwl_disable_11n { struct iwl_mod_params { int sw_crypto; unsigned int disable_11n; - int amsdu_size_8K; + int amsdu_size; bool restart_fw; bool bt_coex_active; int led_mode; diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c index 3b8e85e51002..60b7fce88d32 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c @@ -379,8 +379,19 @@ static void iwl_init_vht_hw_capab(const struct iwl_cfg *cfg, else vht_cap->cap |= IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN; - if (iwlwifi_mod_params.amsdu_size_8K) + switch (iwlwifi_mod_params.amsdu_size) { + case IWL_AMSDU_4K: + vht_cap->cap |= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895; + break; + case IWL_AMSDU_8K: vht_cap->cap |= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991; + break; + case IWL_AMSDU_12K: + vht_cap->cap |= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454; + break; + default: + break; + } vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 | diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h index 6f76525088f0..607f4f7ea94c 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h @@ -423,6 +423,22 @@ enum iwl_trans_status { STATUS_TRANS_DEAD, }; +static inline int +iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size) +{ + switch (rb_size) { + case IWL_AMSDU_4K: + return get_order(4 * 1024); + case IWL_AMSDU_8K: + return get_order(8 * 1024); + case IWL_AMSDU_12K: + return get_order(12 * 1024); + default: + WARN_ON(1); + return -1; + } +} + /** * struct iwl_trans_config - transport configuration * @@ -436,7 +452,7 @@ enum iwl_trans_status { * list of such notifications to filter. Max length is * %MAX_NO_RECLAIM_CMDS. * @n_no_reclaim_cmds: # of commands in list - * @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs, + * @rx_buf_size: RX buffer size needed for A-MSDUs * if unset 4k will be the RX buffer size * @bc_table_dword: set to true if the BC table expects the byte count to be * in DWORD (as opposed to bytes) @@ -456,7 +472,7 @@ struct iwl_trans_config { const u8 *no_reclaim_cmds; unsigned int n_no_reclaim_cmds; - bool rx_buf_size_8k; + enum iwl_amsdu_size rx_buf_size; bool bc_table_dword; bool scd_set_active; bool wide_cmd_header; diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index 13c97f665ba8..1646cddadbd8 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -485,7 +485,21 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg, trans_cfg.op_mode = op_mode; trans_cfg.no_reclaim_cmds = no_reclaim_cmds; trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds); - trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K; + switch (iwlwifi_mod_params.amsdu_size) { + case IWL_AMSDU_4K: + trans_cfg.rx_buf_size = IWL_AMSDU_4K; + break; + case IWL_AMSDU_8K: + trans_cfg.rx_buf_size = IWL_AMSDU_8K; + break; + case IWL_AMSDU_12K: + trans_cfg.rx_buf_size = IWL_AMSDU_12K; + break; + default: + pr_err("%s: Unsupported amsdu_size: %d\n", KBUILD_MODNAME, + iwlwifi_mod_params.amsdu_size); + trans_cfg.rx_buf_size = IWL_AMSDU_4K; + } trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR); diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h index feb2f7e81134..bf8cb59097ea 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h @@ -302,7 +302,7 @@ iwl_pcie_get_scratchbuf_dma(struct iwl_txq *txq, int idx) * @ucode_write_complete: indicates that the ucode has been copied. * @ucode_write_waitq: wait queue for uCode load * @cmd_queue - command queue number - * @rx_buf_size_8k: 8 kB RX buffer size + * @rx_buf_size: Rx buffer size * @bc_table_dword: true if the BC table expects DWORD (as opposed to bytes) * @scd_set_active: should the transport configure the SCD for HCMD queue * @wide_cmd_header: true when ucode supports wide command header format @@ -356,7 +356,7 @@ struct iwl_trans_pcie { u8 n_no_reclaim_cmds; u8 no_reclaim_cmds[MAX_NO_RECLAIM_CMDS]; - bool rx_buf_size_8k; + enum iwl_amsdu_size rx_buf_size; bool bc_table_dword; bool scd_set_active; bool wide_cmd_header; diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index e06591f625c4..b837b34f9cdb 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -602,10 +602,20 @@ static void iwl_pcie_rx_hw_init(struct iwl_trans *trans, struct iwl_rxq *rxq) u32 rb_size; const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ - if (trans_pcie->rx_buf_size_8k) + switch (trans_pcie->rx_buf_size) { + case IWL_AMSDU_4K: + rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; + break; + case IWL_AMSDU_8K: rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; - else + break; + case IWL_AMSDU_12K: + rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K; + break; + default: + WARN_ON(1); rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; + } /* Stop Rx DMA */ iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); @@ -629,7 +639,7 @@ static void iwl_pcie_rx_hw_init(struct iwl_trans *trans, struct iwl_rxq *rxq) * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in * the credit mechanism in 5000 HW RX FIFO * Direct rx interrupts to hosts - * Rx buffer size 4 or 8k + * Rx buffer size 4 or 8k or 12k * RB timeout 0x10 * 256 RBDs */ diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index 90283453073c..889227c54120 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1435,11 +1435,9 @@ static void iwl_trans_pcie_configure(struct iwl_trans *trans, memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds, trans_pcie->n_no_reclaim_cmds * sizeof(u8)); - trans_pcie->rx_buf_size_8k = trans_cfg->rx_buf_size_8k; - if (trans_pcie->rx_buf_size_8k) - trans_pcie->rx_page_order = get_order(8 * 1024); - else - trans_pcie->rx_page_order = get_order(4 * 1024); + trans_pcie->rx_buf_size = trans_cfg->rx_buf_size; + trans_pcie->rx_page_order = + iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size); trans_pcie->wide_cmd_header = trans_cfg->wide_cmd_header; trans_pcie->command_names = trans_cfg->command_names; -- 2.30.2