Merge "usb: dwc3: bulk out endpoint optimization" (2d9edb28) · Commits · e / devices / android_kernel_sony_msm8994

drivers/usb/dwc3/core.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -46,6 +46,7 @@
		#include <linux/dma-mapping.h>
		#include <linux/mm.h>
		#include <linux/debugfs.h>
		#include <linux/hrtimer.h>

		#include <linux/usb/ch9.h>
		#include <linux/usb/gadget.h>
		@@ -509,6 +510,7 @@ struct dwc3_ep_events {
		* @dbg_ep_events: different events counter for endpoint
		* @dbg_ep_events_diff: differential events counter for endpoint
		* @dbg_ep_events_ts: timestamp for previous event counters
		* @xfer_timer: timer to manage transfer complete event timeout
		*/
		struct dwc3_ep {
		struct usb_ep endpoint;
		@@ -548,6 +550,7 @@ struct dwc3_ep {
		struct dwc3_ep_events dbg_ep_events;
		struct dwc3_ep_events dbg_ep_events_diff;
		struct timespec dbg_ep_events_ts;
		struct hrtimer xfer_timer;
		};

		enum dwc3_phy {

drivers/usb/dwc3/gadget.c

+86 −2

Original line number	Diff line number	Diff line
		@@ -48,6 +48,7 @@
		#include <linux/list.h>
		#include <linux/dma-mapping.h>
		#include <linux/vmalloc.h>
		#include <linux/module.h>

		#include <linux/usb/ch9.h>
		#include <linux/usb/gadget.h>
		@@ -58,6 +59,11 @@
		#include "debug.h"
		#include "io.h"

		#define BULK_EP_XFER_TIMEOUT (8) /* milliseconds */

		static int bulk_ep_xfer_timeout_ms = BULK_EP_XFER_TIMEOUT;
		module_param(bulk_ep_xfer_timeout_ms, int, S_IRUGO \| S_IWUSR);

		static void dwc3_gadget_usb2_phy_suspend(struct dwc3 *dwc, int suspend);
		static void dwc3_gadget_usb3_phy_suspend(struct dwc3 *dwc, int suspend);
		static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc);
		@@ -69,6 +75,8 @@ struct dwc3_usb_gadget {
		struct dwc3 *dwc;
		};

		static void dwc3_endpoint_transfer_complete(struct dwc3 , struct dwc3_ep ,
		const struct dwc3_event_depevt *, int);
		/**
		* dwc3_gadget_set_test_mode - Enables USB2 Test Modes
		* @dwc: pointer to our context structure
		@@ -904,6 +912,17 @@ update_trb:
		break;

		case USB_ENDPOINT_XFER_BULK:
		trb->ctrl = DWC3_TRBCTL_NORMAL;
		/*
		* bulk endpoint optimization: setting the CSP bit (continue on
		* short packet) will prevent the core from generating an
		* XferComplete event for each TRB with a short packet
		* (except for the last TRB).
		*/
		if (!last)
		trb->ctrl \|= DWC3_TRB_CTRL_CSP;
		break;

		case USB_ENDPOINT_XFER_INT:
		trb->ctrl = DWC3_TRBCTL_NORMAL;
		break;
		@@ -1186,6 +1205,12 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
		dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc,
		dep->number);
		WARN_ON_ONCE(!dep->resource_index);

		if (usb_endpoint_xfer_bulk(dep->endpoint.desc)) {
		hrtimer_start(&dep->xfer_timer, ktime_set(0,
		bulk_ep_xfer_timeout_ms * NSEC_PER_MSEC),
		HRTIMER_MODE_REL);
		}
		}

		return 0;
		@@ -2035,6 +2060,40 @@ static const struct usb_gadget_ops dwc3_gadget_ops = {

		/* -------------------------------------------------------------------------- */

		static enum hrtimer_restart dwc3_gadget_ep_timer(struct hrtimer *hrtimer)
		{
		struct dwc3_ep *dep = container_of(hrtimer, struct dwc3_ep, xfer_timer);
		struct dwc3_event_depevt event;
		struct dwc3 *dwc;

		if (!dep) {
		pr_err("%s: NULL endpoint!\n", __func__);
		goto out;
		}
		if (!(dep->flags & DWC3_EP_ENABLED)) {
		pr_debug("%s: disabled endpoint!\n", __func__);
		goto out;
		}
		if (!dep->endpoint.desc) {
		pr_err("%s: NULL endpoint desc!\n", __func__);
		goto out;
		}
		if (!dep->dwc) {
		pr_err("%s: NULL dwc3 ptr!\n", __func__);
		goto out;
		}
		dwc = dep->dwc;

		event.status = 0;

		spin_lock(&dwc->lock);
		dwc3_endpoint_transfer_complete(dep->dwc, dep, &event, 1);
		spin_unlock(&dwc->lock);

		out:
		return HRTIMER_NORESTART;
		}

		static int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc,
		u8 num, u32 direction)
		{
		@@ -2083,6 +2142,10 @@ static int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc,

		INIT_LIST_HEAD(&dep->request_list);
		INIT_LIST_HEAD(&dep->req_queued);

		hrtimer_init(&dep->xfer_timer, CLOCK_MONOTONIC,
		HRTIMER_MODE_REL);
		dep->xfer_timer.function = dwc3_gadget_ep_timer;
		}

		return 0;
		@@ -2191,7 +2254,8 @@ static int __dwc3_cleanup_done_trbs(struct dwc3 dwc, struct dwc3_ep dep,
		dep->flags &= ~DWC3_EP_MISSED_ISOC;
		}
		} else {
		if (count && (event->status & DEPEVT_STATUS_SHORT))
		if (count && (event->status & DEPEVT_STATUS_SHORT) &&
		!(trb->ctrl & DWC3_TRB_CTRL_CSP))
		s_pkt = 1;
		}

		@@ -2227,9 +2291,19 @@ static int dwc3_cleanup_done_reqs(struct dwc3 dwc, struct dwc3_ep dep,
		do {
		req = next_request(&dep->req_queued);
		if (!req) {
		if (event->status)
		WARN_ON_ONCE(1);
		return 1;
		}

		/*
		* For bulk endpoints, HWO bit may be set when the transfer
		* complete timeout expires.
		*/
		if (usb_endpoint_xfer_bulk(dep->endpoint.desc) &&
		(req->trb->ctrl & DWC3_TRB_CTRL_HWO))
		return 0;

		i = 0;
		do {
		slot = req->start_slot + i;
		@@ -2305,6 +2379,16 @@ static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc,
		if (clean_busy)
		dep->flags &= ~DWC3_EP_BUSY;

		if (usb_endpoint_xfer_bulk(dep->endpoint.desc)) {
		/* Cancel transfer complete timer when hitting the last TRB */
		if (!(event->status & DEPEVT_STATUS_LST))
		hrtimer_start(&dep->xfer_timer, ktime_set(0,
		bulk_ep_xfer_timeout_ms * NSEC_PER_MSEC),
		HRTIMER_MODE_REL);
		else
		hrtimer_cancel(&dep->xfer_timer);
		}

		/*
		* WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround.
		* See dwc3_gadget_linksts_change_interrupt() for 1st half.