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| /freebsd-11.0-release/sys/dev/usb/controller/ | ||
| H A D | dwc_otgreg.h | diff 285638 Thu Jul 16 16:22:01 MDT 2015 hselasky Optimise the DWC OTG host mode driver's transmit path: 1) Use the TX FIFO empty interrupts to poll the transmit FIFO usage, instead of using own software counters and waiting for SOF interrupts. Assume that enough FIFO space is available to execute one USB OUT transfer of any kind when the TX FIFO is empty. 2) Use the host channel halted event to asynchronously wait for host channels to be disabled instead of waiting for SOF interrupts. This results in less turnaround time for re-using host channels and at the same time increases the performance. The network transmit performance measured by "iperf" for the "RPi-B v1 2011/12" board, increased from 45MBit/s to 65Mbit/s after applying the changes above. No regressions seen using: - High Speed (BULK, CONTROL, INTERRUPT) - Full Speed (All transfer types) - Low Speed (Control and Interrupt) MFC after: 1 month Submitted by: Daisuke Aoyama <aoyama@peach.ne.jp> |
| H A D | dwc_otg.h | diff 285638 Thu Jul 16 16:22:01 MDT 2015 hselasky Optimise the DWC OTG host mode driver's transmit path: 1) Use the TX FIFO empty interrupts to poll the transmit FIFO usage, instead of using own software counters and waiting for SOF interrupts. Assume that enough FIFO space is available to execute one USB OUT transfer of any kind when the TX FIFO is empty. 2) Use the host channel halted event to asynchronously wait for host channels to be disabled instead of waiting for SOF interrupts. This results in less turnaround time for re-using host channels and at the same time increases the performance. The network transmit performance measured by "iperf" for the "RPi-B v1 2011/12" board, increased from 45MBit/s to 65Mbit/s after applying the changes above. No regressions seen using: - High Speed (BULK, CONTROL, INTERRUPT) - Full Speed (All transfer types) - Low Speed (Control and Interrupt) MFC after: 1 month Submitted by: Daisuke Aoyama <aoyama@peach.ne.jp> |
| H A D | dwc_otg.c | diff 285638 Thu Jul 16 16:22:01 MDT 2015 hselasky Optimise the DWC OTG host mode driver's transmit path: 1) Use the TX FIFO empty interrupts to poll the transmit FIFO usage, instead of using own software counters and waiting for SOF interrupts. Assume that enough FIFO space is available to execute one USB OUT transfer of any kind when the TX FIFO is empty. 2) Use the host channel halted event to asynchronously wait for host channels to be disabled instead of waiting for SOF interrupts. This results in less turnaround time for re-using host channels and at the same time increases the performance. The network transmit performance measured by "iperf" for the "RPi-B v1 2011/12" board, increased from 45MBit/s to 65Mbit/s after applying the changes above. No regressions seen using: - High Speed (BULK, CONTROL, INTERRUPT) - Full Speed (All transfer types) - Low Speed (Control and Interrupt) MFC after: 1 month Submitted by: Daisuke Aoyama <aoyama@peach.ne.jp> |
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