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Commit 93190fb0 authored by Avri Altman's avatar Avri Altman Committed by Emmanuel Grumbach
Browse files

iwlwifi: mvm: Enable Rx Checksum hw 



TCP software implementation on the host requires extensive computing
power.  Offloading even some of the TCP/IP stack to the NIC might save
a significant overhead. In order to enable this feature on our hw,
we need to configure it first. Once done, we mark this capability,
to be advertised later to the OS via ieee80211_register_hw.
The driver Rx indications for TCP Checksum is integrated within the
standard Rx status. The driver responds to those indications as follows:
If the frame was tested by hw and checksum ok report CHECKSUM_UNNECESSARY.
Otherwise, report CHECKSUM_NONE.

Signed-off-by: default avatarAvri Altman <avri.altman@intel.com>
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
parent 869f3b15

drivers/net/wireless/iwlwifi/iwl-8000.c

+1 −0
Original line number Diff line number Diff line
@@ -154,6 +154,7 @@ static const struct iwl_tt_params iwl8000_tt_params = { 
	.led_mode = IWL_LED_RF_STATE,					\

	.nvm_hw_section_num = NVM_HW_SECTION_NUM_FAMILY_8000,		\

	.d0i3 = true,							\

	.features = NETIF_F_RXCSUM,					\

	.non_shared_ant = ANT_A,					\

	.dccm_offset = IWL8260_DCCM_OFFSET,				\

	.dccm_len = IWL8260_DCCM_LEN,					\

drivers/net/wireless/iwlwifi/iwl-config.h

+2 −0
Original line number Diff line number Diff line
@@ -297,6 +297,7 @@ struct iwl_pwr_tx_backoff { 
 *	mode set

 * @d0i3: device uses d0i3 instead of d3

 * @nvm_hw_section_num: the ID of the HW NVM section

 * @features: hw features, any combination of feature_whitelist

 * @pwr_tx_backoffs: translation table between power limits and backoffs

 * @max_rx_agg_size: max RX aggregation size of the ADDBA request/response

 * @max_tx_agg_size: max TX aggregation size of the ADDBA request/response
@@ -348,6 +349,7 @@ struct iwl_cfg { 
	bool no_power_up_nic_in_init;

	const char *default_nvm_file_B_step;

	const char *default_nvm_file_C_step;

	netdev_features_t features;

	unsigned int max_rx_agg_size;

	bool disable_dummy_notification;

	unsigned int max_tx_agg_size;

drivers/net/wireless/iwlwifi/iwl-fw-file.h

+2 −0
Original line number Diff line number Diff line
@@ -297,6 +297,7 @@ typedef unsigned int __bitwise__ iwl_ucode_tlv_capa_t; 
 * @IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH: supports TDLS channel switching

 * @IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT: supports Hot Spot Command

 * @IWL_UCODE_TLV_CAPA_DC2DC_SUPPORT: supports DC2DC Command

 * @IWL_UCODE_TLV_CAPA_CSUM_SUPPORT: supports TCP Checksum Offload

 * @IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS: support radio and beacon statistics

 * @IWL_UCODE_TLV_CAPA_BT_COEX_PLCR: enabled BT Coex packet level co-running

 * @IWL_UCODE_TLV_CAPA_LAR_MULTI_MCC: ucode supports LAR updates with different
@@ -320,6 +321,7 @@ enum iwl_ucode_tlv_capa { 
	IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH		= (__force iwl_ucode_tlv_capa_t)13,

	IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT		= (__force iwl_ucode_tlv_capa_t)18,

	IWL_UCODE_TLV_CAPA_DC2DC_CONFIG_SUPPORT		= (__force iwl_ucode_tlv_capa_t)19,

	IWL_UCODE_TLV_CAPA_CSUM_SUPPORT			= (__force iwl_ucode_tlv_capa_t)21,

	IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS		= (__force iwl_ucode_tlv_capa_t)22,

	IWL_UCODE_TLV_CAPA_BT_COEX_PLCR			= (__force iwl_ucode_tlv_capa_t)28,

	IWL_UCODE_TLV_CAPA_LAR_MULTI_MCC		= (__force iwl_ucode_tlv_capa_t)29,

drivers/net/wireless/iwlwifi/iwl-prph.h

+3 −0
Original line number Diff line number Diff line
@@ -292,6 +292,9 @@ 


/*********************** END TX SCHEDULER *************************************/



/* tcp checksum offload */

#define RX_EN_CSUM		(0x00a00d88)



/* Oscillator clock */

#define OSC_CLK				(0xa04068)

#define OSC_CLK_FORCE_CONTROL		(0x8)

drivers/net/wireless/iwlwifi/mvm/fw-api.h

+29 −2
Original line number Diff line number Diff line
@@ -1085,10 +1085,33 @@ struct iwl_rx_phy_info { 
	__le16 frame_time;

} __packed;



/*

 * TCP offload Rx assist info

 *

 * bits 0:3 - reserved

 * bits 4:7 - MIC CRC length

 * bits 8:12 - MAC header length

 * bit 13 - Padding indication

 * bit 14 - A-AMSDU indication

 * bit 15 - Offload enabled

 */

enum iwl_csum_rx_assist_info {

	CSUM_RXA_RESERVED_MASK	= 0x000f,

	CSUM_RXA_MICSIZE_MASK	= 0x00f0,

	CSUM_RXA_HEADERLEN_MASK	= 0x1f00,

	CSUM_RXA_PADD		= BIT(13),

	CSUM_RXA_AMSDU		= BIT(14),

	CSUM_RXA_ENA		= BIT(15)

};



/**

 * struct iwl_rx_mpdu_res_start - phy info

 * @assist: see CSUM_RX_ASSIST_ above

 */

struct iwl_rx_mpdu_res_start {

	__le16 byte_count;

	__le16 reserved;

} __packed;

	__le16 assist;

} __packed; /* _RX_MPDU_RES_START_API_S_VER_2 */



/**

 * enum iwl_rx_phy_flags - to parse %iwl_rx_phy_info phy_flags
@@ -1141,6 +1164,8 @@ enum iwl_rx_phy_flags { 
 * @RX_MPDU_RES_STATUS_EXT_IV_BIT_CMP:

 * @RX_MPDU_RES_STATUS_KEY_ID_CMP_BIT:

 * @RX_MPDU_RES_STATUS_ROBUST_MNG_FRAME: this frame is an 11w management frame

 * @RX_MPDU_RES_STATUS_CSUM_DONE: checksum was done by the hw

 * @RX_MPDU_RES_STATUS_CSUM_OK: checksum found no errors

 * @RX_MPDU_RES_STATUS_HASH_INDEX_MSK:

 * @RX_MPDU_RES_STATUS_STA_ID_MSK:

 * @RX_MPDU_RES_STATUS_RRF_KILL:
@@ -1170,6 +1195,8 @@ enum iwl_mvm_rx_status { 
	RX_MPDU_RES_STATUS_EXT_IV_BIT_CMP		= BIT(13),

	RX_MPDU_RES_STATUS_KEY_ID_CMP_BIT		= BIT(14),

	RX_MPDU_RES_STATUS_ROBUST_MNG_FRAME		= BIT(15),

	RX_MPDU_RES_STATUS_CSUM_DONE			= BIT(16),

	RX_MPDU_RES_STATUS_CSUM_OK			= BIT(17),

	RX_MPDU_RES_STATUS_HASH_INDEX_MSK		= (0x3F0000),

	RX_MPDU_RES_STATUS_STA_ID_MSK			= (0x1f000000),

	RX_MPDU_RES_STATUS_RRF_KILL			= BIT(29),