This is the third version of the high latency patches (stuff common for usb and sdio). One major difference between this version and the previous is that the num_pending_tx counter has been disabled for high latency devices (last patch). This fixes the previous issue with the halted USB RX. I have tested these patches with a Linksys WUSB6100M and it looks much better than the previous version. High latency devices does not seem to send HTT_T2H_MSG_TYPE_TX_COMPL_IND's to the host for outgoing packets, resulting in a transmit stop when the upper limit of num_pending_tx is reached. The qcacld driver mentions that the TX_COMPL_IND can be disabled for HL devices in order to achieve better throughput: /* * HTT option TLV for specifying whether HL systems should indicate * over-the-air tx completion for individual frames, or should instead * send a bulk TX_CREDIT_UPDATE_IND except when the host explicitly * requests an OTA tx completion for a particular tx frame. * This option does not apply to LL systems, where the TX_COMPL_IND * is mandatory. * This option is primarily intended for HL systems in which the tx frame * downloads over the host --> target bus are as slow as or slower than * the transmissions over the WLAN PHY. For cases where the bus is faster * than the WLAN PHY, the target will transmit relatively large A-MPDUs, * and consquently will send one TX_COMPL_IND message that covers several * tx frames. For cases where the WLAN PHY is faster than the bus, * the target will end up transmitting very short A-MPDUs, and consequently * sending many TX_COMPL_IND messages, which each cover a very small number * of tx frames. * The HL_SUPPRESS_TX_COMPL_IND TLV can be sent by the host to the target as * a suffix to the VERSION_REQ message to request whether the host desires to * use TX_CREDIT_UPDATE_IND rather than TX_COMPL_IND. The target can then * send a HTT_SUPPRESS_TX_COMPL_IND TLV to the host as a suffix to the * VERSION_CONF message to confirm whether TX_CREDIT_UPDATE_IND will be used * rather than TX_COMPL_IND. TX_CREDIT_UPDATE_IND shall only be used if the * host sends a HL_SUPPRESS_TX_COMPL_IND TLV requesting use of * TX_CREDIT_UPDATE_IND, and the target sends a HL_SUPPRESS_TX_COMPLE_IND TLV * back to the host confirming use of TX_CREDIT_UPDATE_IND. * Lack of a HL_SUPPRESS_TX_COMPL_IND TLV from either host --> target or * target --> host is equivalent to a HL_SUPPRESS_TX_COMPL_IND that * explicitly specifies HL_ALLOW_TX_COMPL_IND in the value payload of the * TLV. */ I am suspecting this is the default behavior in the firmware. I have tried a simple wget test where I download a Linux kernel tar ball from kernel.org. I got the below results: wget --no-check-certificate \ https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.11.4.tar.xz 2017-09-17 16:46:20 (13.3 MB/s) - 'linux-4.11.4.tar.xz' saved [95549228/95549228] 13.3 MB/s is a fairly OK result since I have a 100 Mbit/s internet connection. Changes since v2: - Disabled htt num_pending_tx counter for HL. - Fixed transmit flags for HL HTT TX. - Proper marking of aggregated frames in the HL HTT RX handler. - A few other minor fixes Erik Stromdahl (11): ath10k: high_latency detection ath10k: htt: RX ring config HL support ath10k: per target configurablity of various items ath10k: add start_once support ath10k: htt: High latency TX support ath10k: htt: High latency RX support ath10k: various fixes for high latency devices ath10k: add QCA9377 usb hw_param item ath10k: add QCA9377 sdio hw_param item ath10k: wmi: disable softirq's while calling ieee80211_rx ath10k: remove htt pending TX count for high latency drivers/net/wireless/ath/ath10k/core.c | 128 +++++++++++++++++++----- drivers/net/wireless/ath/ath10k/core.h | 16 +-- drivers/net/wireless/ath/ath10k/htc.c | 19 ++-- drivers/net/wireless/ath/ath10k/htt.c | 5 +- drivers/net/wireless/ath/ath10k/htt.h | 57 ++++++++++- drivers/net/wireless/ath/ath10k/htt_rx.c | 122 ++++++++++++++++++++++- drivers/net/wireless/ath/ath10k/htt_tx.c | 157 +++++++++++++++++++++++++++++- drivers/net/wireless/ath/ath10k/hw.h | 30 ++++++ drivers/net/wireless/ath/ath10k/mac.c | 5 +- drivers/net/wireless/ath/ath10k/rx_desc.h | 15 +++ drivers/net/wireless/ath/ath10k/txrx.c | 5 +- drivers/net/wireless/ath/ath10k/wmi-tlv.c | 4 +- drivers/net/wireless/ath/ath10k/wmi.c | 3 + 13 files changed, 513 insertions(+), 53 deletions(-) -- 2.14.1
