Commit ced9eee1 authored by Douglas Anderson's avatar Douglas Anderson Committed by Felipe Balbi
Browse files

usb: dwc2: host: Rename some fields in struct dwc2_qh 



This no-op change just does some renames to simplify a future patch.

1. The "interval" field is renamed to "host_interval" to make it more
   obvious that this interval may be 8 times the interval that the
   device sees (if we're doing split transactions).  A future patch will
   also add the "device_interval" field.
2. The "usecs" field is renamed to "host_us" again to make it more
   obvious that this is the time for the transaction as seen by the
   host.  For split transactions the device may see a much longer
   transaction time.  A future patch will also add "device_us".
3. The "sched_frame" field is renamed to "next_active_frame".  The name
   "sched_frame" kept confusing me because it felt like something more
   permament (the QH's reservation or something).  The name
   "next_active_frame" makes it more obvious that this field is
   constantly changing.

Acked-by: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Tested-by: default avatarHeiko Stuebner <heiko@sntech.de>
Tested-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: default avatarFelipe Balbi <balbi@kernel.org>
parent 4e50e011

drivers/usb/dwc2/hcd.h

+12 −8
Original line number Diff line number Diff line
@@ -236,10 +236,14 @@ enum dwc2_transaction_type { 
 * @do_split:           Full/low speed endpoint on high-speed hub requires split

 * @td_first:           Index of first activated isochronous transfer descriptor

 * @td_last:            Index of last activated isochronous transfer descriptor

 * @usecs:              Bandwidth in microseconds per (micro)frame

 * @interval:           Interval between transfers in (micro)frames

 * @sched_frame:        (Micro)frame to initialize a periodic transfer.

 *                      The transfer executes in the following (micro)frame.

 * @host_us:            Bandwidth in microseconds per transfer as seen by host

 * @host_interval:      Interval between transfers as seen by the host.  If

 *                      the host is high speed and the device is low speed this

 *                      will be 8 times device interval.

 * @next_active_frame:  (Micro)frame before we next need to put something on

 *                      the bus.  We'll move the qh to active here.  If the

 *                      host is in high speed mode this will be a uframe.  If

 *                      the host is in low speed mode this will be a full frame.

 * @frame_usecs:        Internal variable used by the microframe scheduler

 * @start_split_frame:  (Micro)frame at which last start split was initialized

 * @ntd:                Actual number of transfer descriptors in a list
@@ -272,9 +276,9 @@ struct dwc2_qh { 
	u8 do_split;

	u8 td_first;

	u8 td_last;

	u16 usecs;

	u16 interval;

	u16 sched_frame;

	u16 host_us;

	u16 host_interval;

	u16 next_active_frame;

	u16 frame_usecs[8];

	u16 start_split_frame;

	u16 ntd;
@@ -651,7 +655,7 @@ static inline u16 dwc2_hcd_get_ep_bandwidth(struct dwc2_hsotg *hsotg, 
		return 0;

	}



	return qh->usecs;

	return qh->host_us;

}



extern void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,

drivers/usb/dwc2/hcd_ddma.c

+20 −17
Original line number Diff line number Diff line
@@ -81,7 +81,7 @@ static u16 dwc2_max_desc_num(struct dwc2_qh *qh) 
static u16 dwc2_frame_incr_val(struct dwc2_qh *qh)

{

	return qh->dev_speed == USB_SPEED_HIGH ?

	       (qh->interval + 8 - 1) / 8 : qh->interval;

	       (qh->host_interval + 8 - 1) / 8 : qh->host_interval;

}



static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
@@ -252,7 +252,7 @@ static void dwc2_update_frame_list(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 
	chan = qh->channel;

	inc = dwc2_frame_incr_val(qh);

	if (qh->ep_type == USB_ENDPOINT_XFER_ISOC)

		i = dwc2_frame_list_idx(qh->sched_frame);

		i = dwc2_frame_list_idx(qh->next_active_frame);

	else

		i = 0;
@@ -278,13 +278,13 @@ static void dwc2_update_frame_list(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 
		return;



	chan->schinfo = 0;

	if (chan->speed == USB_SPEED_HIGH && qh->interval) {

	if (chan->speed == USB_SPEED_HIGH && qh->host_interval) {

		j = 1;

		/* TODO - check this */

		inc = (8 + qh->interval - 1) / qh->interval;

		inc = (8 + qh->host_interval - 1) / qh->host_interval;

		for (i = 0; i < inc; i++) {

			chan->schinfo |= j;

			j = j << qh->interval;

			j = j << qh->host_interval;

		}

	} else {

		chan->schinfo = 0xff;
@@ -431,7 +431,10 @@ static u16 dwc2_calc_starting_frame(struct dwc2_hsotg *hsotg, 


	hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);



	/* sched_frame is always frame number (not uFrame) both in FS and HS! */

	/*

	 * next_active_frame is always frame number (not uFrame) both in FS

	 * and HS!

	 */



	/*

	 * skip_frames is used to limit activated descriptors number
@@ -514,13 +517,13 @@ static u16 dwc2_recalc_initial_desc_idx(struct dwc2_hsotg *hsotg, 
		 */

		fr_idx_tmp = dwc2_frame_list_idx(frame);

		fr_idx = (FRLISTEN_64_SIZE +

			  dwc2_frame_list_idx(qh->sched_frame) - fr_idx_tmp)

			 % dwc2_frame_incr_val(qh);

			  dwc2_frame_list_idx(qh->next_active_frame) -

			  fr_idx_tmp) % dwc2_frame_incr_val(qh);

		fr_idx = (fr_idx + fr_idx_tmp) % FRLISTEN_64_SIZE;

	} else {

		qh->sched_frame = dwc2_calc_starting_frame(hsotg, qh,

		qh->next_active_frame = dwc2_calc_starting_frame(hsotg, qh,

							   &skip_frames);

		fr_idx = dwc2_frame_list_idx(qh->sched_frame);

		fr_idx = dwc2_frame_list_idx(qh->next_active_frame);

	}



	qh->td_first = qh->td_last = dwc2_frame_to_desc_idx(qh, fr_idx);
@@ -583,7 +586,7 @@ static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg, 
	u16 next_idx;



	idx = qh->td_last;

	inc = qh->interval;

	inc = qh->host_interval;

	hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);

	cur_idx = dwc2_frame_list_idx(hsotg->frame_number);

	next_idx = dwc2_desclist_idx_inc(qh->td_last, inc, qh->dev_speed);
@@ -605,11 +608,11 @@ static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg, 
		}

	}



	if (qh->interval) {

		ntd_max = (dwc2_max_desc_num(qh) + qh->interval - 1) /

				qh->interval;

	if (qh->host_interval) {

		ntd_max = (dwc2_max_desc_num(qh) + qh->host_interval - 1) /

				qh->host_interval;

		if (skip_frames && !qh->channel)

			ntd_max -= skip_frames / qh->interval;

			ntd_max -= skip_frames / qh->host_interval;

	}



	max_xfer_size = qh->dev_speed == USB_SPEED_HIGH ?
@@ -1029,7 +1032,7 @@ static void dwc2_complete_isoc_xfer_ddma(struct dwc2_hsotg *hsotg, 
							  idx);

			if (rc < 0)

				return;

			idx = dwc2_desclist_idx_inc(idx, qh->interval,

			idx = dwc2_desclist_idx_inc(idx, qh->host_interval,

						    chan->speed);

			if (!rc)

				continue;
@@ -1039,7 +1042,7 @@ static void dwc2_complete_isoc_xfer_ddma(struct dwc2_hsotg *hsotg, 


			/* rc == DWC2_CMPL_STOP */



			if (qh->interval >= 32)

			if (qh->host_interval >= 32)

				goto stop_scan;



			qh->td_first = idx;

drivers/usb/dwc2/hcd_intr.c

+6 −4
Original line number Diff line number Diff line
@@ -148,9 +148,11 @@ static void dwc2_sof_intr(struct dwc2_hsotg *hsotg) 
	while (qh_entry != &hsotg->periodic_sched_inactive) {

		qh = list_entry(qh_entry, struct dwc2_qh, qh_list_entry);

		qh_entry = qh_entry->next;

		if (dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number)) {

			dwc2_sch_vdbg(hsotg, "QH=%p ready fn=%04x, sch=%04x\n",

				      qh, hsotg->frame_number, qh->sched_frame);

		if (dwc2_frame_num_le(qh->next_active_frame,

				      hsotg->frame_number)) {

			dwc2_sch_vdbg(hsotg, "QH=%p ready fn=%04x, nxt=%04x\n",

				      qh, hsotg->frame_number,

				      qh->next_active_frame);



			/*

			 * Move QH to the ready list to be executed next
@@ -1368,7 +1370,7 @@ static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg, 
			int frnum = dwc2_hcd_get_frame_number(hsotg);



			if (dwc2_full_frame_num(frnum) !=

			    dwc2_full_frame_num(chan->qh->sched_frame)) {

			    dwc2_full_frame_num(chan->qh->next_active_frame)) {

				/*

				 * No longer in the same full speed frame.

				 * Treat this as a transaction error.

drivers/usb/dwc2/hcd_queue.c

+54 −53
Original line number Diff line number Diff line
@@ -78,7 +78,7 @@ static void dwc2_do_unreserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) 
		list_del_init(&qh->qh_list_entry);



	/* Update claimed usecs per (micro)frame */

	hsotg->periodic_usecs -= qh->usecs;

	hsotg->periodic_usecs -= qh->host_us;



	if (hsotg->core_params->uframe_sched > 0) {

		int i;
@@ -193,7 +193,7 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 
		int bytecount =

			dwc2_hb_mult(qh->maxp) * dwc2_max_packet(qh->maxp);



		qh->usecs = NS_TO_US(usb_calc_bus_time(qh->do_split ?

		qh->host_us = NS_TO_US(usb_calc_bus_time(qh->do_split ?

			      USB_SPEED_HIGH : dev_speed, qh->ep_is_in,

			      qh->ep_type == USB_ENDPOINT_XFER_ISOC,

			      bytecount));
@@ -201,32 +201,32 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 
		/* Ensure frame_number corresponds to the reality */

		hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);

		/* Start in a slightly future (micro)frame */

		qh->sched_frame = dwc2_frame_num_inc(hsotg->frame_number,

		qh->next_active_frame = dwc2_frame_num_inc(hsotg->frame_number,

						     SCHEDULE_SLOP);

		qh->interval = urb->interval;

		dwc2_sch_dbg(hsotg, "QH=%p init sch=%04x, fn=%04x, int=%#x\n",

			     qh, qh->sched_frame, hsotg->frame_number,

			     qh->interval);

		qh->host_interval = urb->interval;

		dwc2_sch_dbg(hsotg, "QH=%p init nxt=%04x, fn=%04x, int=%#x\n",

			     qh, qh->next_active_frame, hsotg->frame_number,

			     qh->host_interval);

#if 0

		/* Increase interrupt polling rate for debugging */

		if (qh->ep_type == USB_ENDPOINT_XFER_INT)

			qh->interval = 8;

			qh->host_interval = 8;

#endif

		hprt = dwc2_readl(hsotg->regs + HPRT0);

		prtspd = (hprt & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;

		if (prtspd == HPRT0_SPD_HIGH_SPEED &&

		    (dev_speed == USB_SPEED_LOW ||

		     dev_speed == USB_SPEED_FULL)) {

			qh->interval *= 8;

			qh->sched_frame |= 0x7;

			qh->start_split_frame = qh->sched_frame;

			qh->host_interval *= 8;

			qh->next_active_frame |= 0x7;

			qh->start_split_frame = qh->next_active_frame;

			dwc2_sch_dbg(hsotg,

				     "QH=%p init*8 sch=%04x, fn=%04x, int=%#x\n",

				     qh, qh->sched_frame, hsotg->frame_number,

				     qh->interval);

				     "QH=%p init*8 nxt=%04x, fn=%04x, int=%#x\n",

				     qh, qh->next_active_frame,

				     hsotg->frame_number, qh->host_interval);



		}

		dev_dbg(hsotg->dev, "interval=%d\n", qh->interval);

		dev_dbg(hsotg->dev, "interval=%d\n", qh->host_interval);

	}



	dev_vdbg(hsotg->dev, "DWC OTG HCD QH Initialized\n");
@@ -277,9 +277,9 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 


	if (qh->ep_type == USB_ENDPOINT_XFER_INT) {

		dev_vdbg(hsotg->dev, "DWC OTG HCD QH - usecs = %d\n",

			 qh->usecs);

			 qh->host_us);

		dev_vdbg(hsotg->dev, "DWC OTG HCD QH - interval = %d\n",

			 qh->interval);

			 qh->host_interval);

	}

}
@@ -404,19 +404,19 @@ static int dwc2_check_periodic_bandwidth(struct dwc2_hsotg *hsotg, 
		 * High speed mode

		 * Max periodic usecs is 80% x 125 usec = 100 usec

		 */

		max_claimed_usecs = 100 - qh->usecs;

		max_claimed_usecs = 100 - qh->host_us;

	} else {

		/*

		 * Full speed mode

		 * Max periodic usecs is 90% x 1000 usec = 900 usec

		 */

		max_claimed_usecs = 900 - qh->usecs;

		max_claimed_usecs = 900 - qh->host_us;

	}



	if (hsotg->periodic_usecs > max_claimed_usecs) {

		dev_err(hsotg->dev,

			"%s: already claimed usecs %d, required usecs %d\n",

			__func__, hsotg->periodic_usecs, qh->usecs);

			__func__, hsotg->periodic_usecs, qh->host_us);

		status = -ENOSPC;

	}
@@ -443,7 +443,7 @@ void dwc2_hcd_init_usecs(struct dwc2_hsotg *hsotg) 


static int dwc2_find_single_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)

{

	unsigned short utime = qh->usecs;

	unsigned short utime = qh->host_us;

	int i;



	for (i = 0; i < 8; i++) {
@@ -462,7 +462,7 @@ static int dwc2_find_single_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) 
 */

static int dwc2_find_multi_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)

{

	unsigned short utime = qh->usecs;

	unsigned short utime = qh->host_us;

	unsigned short xtime;

	int t_left;

	int i;
@@ -608,11 +608,11 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) 


			/* Set the new frame up */

			if (frame >= 0) {

				qh->sched_frame &= ~0x7;

				qh->sched_frame |= (frame & 7);

				qh->next_active_frame &= ~0x7;

				qh->next_active_frame |= (frame & 7);

				dwc2_sch_dbg(hsotg,

					     "QH=%p sched_p sch=%04x, uf=%d\n",

					     qh, qh->sched_frame, frame);

					     "QH=%p sched_p nxt=%04x, uf=%d\n",

					     qh, qh->next_active_frame, frame);

			}



			if (status > 0)
@@ -641,7 +641,7 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) 
			hsotg->periodic_channels++;



		/* Update claimed usecs per (micro)frame */

		hsotg->periodic_usecs += qh->usecs;

		hsotg->periodic_usecs += qh->host_us;

	}



	qh->unreserve_pending = 0;
@@ -716,7 +716,7 @@ int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) 
		/* QH already in a schedule */

		return 0;



	if (!dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number) &&

	if (!dwc2_frame_num_le(qh->next_active_frame, hsotg->frame_number) &&

			!hsotg->frame_number) {

		u16 new_frame;
@@ -725,9 +725,9 @@ int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) 
		new_frame = dwc2_frame_num_inc(hsotg->frame_number,

				SCHEDULE_SLOP);



		dwc2_sch_vdbg(hsotg, "QH=%p reset sch=%04x=>%04x\n",

			      qh, qh->sched_frame, new_frame);

		qh->sched_frame = new_frame;

		dwc2_sch_vdbg(hsotg, "QH=%p reset nxt=%04x=>%04x\n",

			      qh, qh->next_active_frame, new_frame);

		qh->next_active_frame = new_frame;

	}



	/* Add the new QH to the appropriate schedule */
@@ -793,10 +793,10 @@ static void dwc2_sched_periodic_split(struct dwc2_hsotg *hsotg, 
				      int sched_next_periodic_split)

{

	u16 incr;

	u16 old_frame = qh->sched_frame;

	u16 old_frame = qh->next_active_frame;



	if (sched_next_periodic_split) {

		qh->sched_frame = frame_number;

		qh->next_active_frame = frame_number;

		incr = dwc2_frame_num_inc(qh->start_split_frame, 1);

		if (dwc2_frame_num_le(frame_number, incr)) {

			/*
@@ -807,23 +807,24 @@ static void dwc2_sched_periodic_split(struct dwc2_hsotg *hsotg, 
			 */

			if (qh->ep_type != USB_ENDPOINT_XFER_ISOC ||

			    qh->ep_is_in != 0) {

				qh->sched_frame =

					dwc2_frame_num_inc(qh->sched_frame, 1);

				qh->next_active_frame = dwc2_frame_num_inc(

					qh->next_active_frame, 1);

			}

		}

	} else {

		qh->sched_frame = dwc2_frame_num_inc(qh->start_split_frame,

						     qh->interval);

		if (dwc2_frame_num_le(qh->sched_frame, frame_number))

			qh->sched_frame = frame_number;

		qh->sched_frame |= 0x7;

		qh->start_split_frame = qh->sched_frame;

		qh->next_active_frame =

			dwc2_frame_num_inc(qh->start_split_frame,

					   qh->host_interval);

		if (dwc2_frame_num_le(qh->next_active_frame, frame_number))

			qh->next_active_frame = frame_number;

		qh->next_active_frame |= 0x7;

		qh->start_split_frame = qh->next_active_frame;

	}



	dwc2_sch_vdbg(hsotg, "QH=%p next(%d) fn=%04x, sch=%04x=>%04x (%+d)\n",

	dwc2_sch_vdbg(hsotg, "QH=%p next(%d) fn=%04x, nxt=%04x=>%04x (%+d)\n",

		      qh, sched_next_periodic_split, frame_number, old_frame,

		      qh->sched_frame,

		      dwc2_frame_num_dec(qh->sched_frame, old_frame));

		      qh->next_active_frame,

		      dwc2_frame_num_dec(qh->next_active_frame, old_frame));

}



/*
@@ -861,10 +862,10 @@ void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 
		dwc2_sched_periodic_split(hsotg, qh, frame_number,

					  sched_next_periodic_split);

	} else {

		qh->sched_frame = dwc2_frame_num_inc(qh->sched_frame,

						     qh->interval);

		if (dwc2_frame_num_le(qh->sched_frame, frame_number))

			qh->sched_frame = frame_number;

		qh->next_active_frame = dwc2_frame_num_inc(

			qh->next_active_frame, qh->host_interval);

		if (dwc2_frame_num_le(qh->next_active_frame, frame_number))

			qh->next_active_frame = frame_number;

	}



	if (list_empty(&qh->qtd_list)) {
@@ -876,9 +877,9 @@ void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 
	 * appropriate queue

	 */

	if ((hsotg->core_params->uframe_sched > 0 &&

	     dwc2_frame_num_le(qh->sched_frame, frame_number)) ||

	     dwc2_frame_num_le(qh->next_active_frame, frame_number)) ||

	    (hsotg->core_params->uframe_sched <= 0 &&

	     qh->sched_frame == frame_number))

	     qh->next_active_frame == frame_number))

		list_move_tail(&qh->qh_list_entry,

			       &hsotg->periodic_sched_ready);

	else

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