[linux-block.git] / drivers / media / usb / dvb-usb-v2 / usb_urb.c

// SPDX-License-Identifier: GPL-2.0
/* usb-urb.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
 * see dvb-usb-init.c for copyright information.
 *
 * This file keeps functions for initializing and handling the
 * BULK and ISOC USB data transfers in a generic way.
 * Can be used for DVB-only and also, that's the plan, for
 * Hybrid USB devices (analog and DVB).
 */
#include "dvb_usb_common.h"

/* URB stuff for streaming */

int usb_urb_reconfig(struct usb_data_stream *stream,
		struct usb_data_stream_properties *props);

static void usb_urb_complete(struct urb *urb)
{
	struct usb_data_stream *stream = urb->context;
	int ptype = usb_pipetype(urb->pipe);
	int i;
	u8 *b;

	dev_dbg_ratelimited(&stream->udev->dev,
			"%s: %s urb completed status=%d length=%d/%d pack_num=%d errors=%d\n",
			__func__, ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
			urb->status, urb->actual_length,
			urb->transfer_buffer_length,
			urb->number_of_packets, urb->error_count);

	switch (urb->status) {
	case 0:         /* success */
	case -ETIMEDOUT:    /* NAK */
		break;
	case -ECONNRESET:   /* kill */
	case -ENOENT:
	case -ESHUTDOWN:
		return;
	default:        /* error */
		dev_dbg_ratelimited(&stream->udev->dev,
				"%s: urb completition failed=%d\n",
				__func__, urb->status);
		break;
	}

	b = (u8 *) urb->transfer_buffer;
	switch (ptype) {
	case PIPE_ISOCHRONOUS:
		for (i = 0; i < urb->number_of_packets; i++) {
			if (urb->iso_frame_desc[i].status != 0)
				dev_dbg(&stream->udev->dev,
						"%s: iso frame descriptor has an error=%d\n",
						__func__,
						urb->iso_frame_desc[i].status);
			else if (urb->iso_frame_desc[i].actual_length > 0)
				stream->complete(stream,
					b + urb->iso_frame_desc[i].offset,
					urb->iso_frame_desc[i].actual_length);

			urb->iso_frame_desc[i].status = 0;
			urb->iso_frame_desc[i].actual_length = 0;
		}
		break;
	case PIPE_BULK:
		if (urb->actual_length > 0)
			stream->complete(stream, b, urb->actual_length);
		break;
	default:
		dev_err(&stream->udev->dev,
				"%s: unknown endpoint type in completition handler\n",
				KBUILD_MODNAME);
		return;
	}
	usb_submit_urb(urb, GFP_ATOMIC);
}

int usb_urb_killv2(struct usb_data_stream *stream)
{
	int i;
	for (i = 0; i < stream->urbs_submitted; i++) {
		dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);
		/* stop the URB */
		usb_kill_urb(stream->urb_list[i]);
	}
	stream->urbs_submitted = 0;
	return 0;
}

int usb_urb_submitv2(struct usb_data_stream *stream,
		struct usb_data_stream_properties *props)
{
	int i, ret;

	if (props) {
		ret = usb_urb_reconfig(stream, props);
		if (ret < 0)
			return ret;
	}

	for (i = 0; i < stream->urbs_initialized; i++) {
		dev_dbg(&stream->udev->dev, "%s: submit urb=%d\n", __func__, i);
		ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC);
		if (ret) {
			dev_err(&stream->udev->dev,
					"%s: could not submit urb no. %d - get them all back\n",
					KBUILD_MODNAME, i);
			usb_urb_killv2(stream);
			return ret;
		}
		stream->urbs_submitted++;
	}
	return 0;
}

static int usb_urb_free_urbs(struct usb_data_stream *stream)
{
	int i;

	usb_urb_killv2(stream);

	for (i = stream->urbs_initialized - 1; i >= 0; i--) {
		if (stream->urb_list[i]) {
			dev_dbg(&stream->udev->dev, "%s: free urb=%d\n",
					__func__, i);
			/* free the URBs */
			usb_free_urb(stream->urb_list[i]);
		}
	}
	stream->urbs_initialized = 0;

	return 0;
}

static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream)
{
	int i, j;

	/* allocate the URBs */
	for (i = 0; i < stream->props.count; i++) {
		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
		stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
		if (!stream->urb_list[i]) {
			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
			for (j = 0; j < i; j++)
				usb_free_urb(stream->urb_list[j]);
			return -ENOMEM;
		}
		usb_fill_bulk_urb(stream->urb_list[i],
				stream->udev,
				usb_rcvbulkpipe(stream->udev,
						stream->props.endpoint),
				stream->buf_list[i],
				stream->props.u.bulk.buffersize,
				usb_urb_complete, stream);

		stream->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
		stream->urb_list[i]->transfer_dma = stream->dma_addr[i];
		stream->urbs_initialized++;
	}
	return 0;
}

static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream)
{
	int i, j;

	/* allocate the URBs */
	for (i = 0; i < stream->props.count; i++) {
		struct urb *urb;
		int frame_offset = 0;
		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
		stream->urb_list[i] = usb_alloc_urb(
				stream->props.u.isoc.framesperurb, GFP_ATOMIC);
		if (!stream->urb_list[i]) {
			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
			for (j = 0; j < i; j++)
				usb_free_urb(stream->urb_list[j]);
			return -ENOMEM;
		}

		urb = stream->urb_list[i];

		urb->dev = stream->udev;
		urb->context = stream;
		urb->complete = usb_urb_complete;
		urb->pipe = usb_rcvisocpipe(stream->udev,
				stream->props.endpoint);
		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
		urb->interval = stream->props.u.isoc.interval;
		urb->number_of_packets = stream->props.u.isoc.framesperurb;
		urb->transfer_buffer_length = stream->props.u.isoc.framesize *
				stream->props.u.isoc.framesperurb;
		urb->transfer_buffer = stream->buf_list[i];
		urb->transfer_dma = stream->dma_addr[i];

		for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
			urb->iso_frame_desc[j].offset = frame_offset;
			urb->iso_frame_desc[j].length =
					stream->props.u.isoc.framesize;
			frame_offset += stream->props.u.isoc.framesize;
		}

		stream->urbs_initialized++;
	}
	return 0;
}

static int usb_free_stream_buffers(struct usb_data_stream *stream)
{
	if (stream->state & USB_STATE_URB_BUF) {
		while (stream->buf_num) {
			stream->buf_num--;
			dev_dbg(&stream->udev->dev, "%s: free buf=%d\n",
				__func__, stream->buf_num);
			usb_free_coherent(stream->udev, stream->buf_size,
					  stream->buf_list[stream->buf_num],
					  stream->dma_addr[stream->buf_num]);
		}
	}

	stream->state &= ~USB_STATE_URB_BUF;

	return 0;
}

static int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num,
				    unsigned long size)
{
	stream->buf_num = 0;
	stream->buf_size = size;

	dev_dbg(&stream->udev->dev,
			"%s: all in all I will use %lu bytes for streaming\n",
			__func__,  num * size);

	for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
		stream->buf_list[stream->buf_num] = usb_alloc_coherent(
				stream->udev, size, GFP_ATOMIC,
				&stream->dma_addr[stream->buf_num]);
		if (!stream->buf_list[stream->buf_num]) {
			dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",
					__func__, stream->buf_num);
			usb_free_stream_buffers(stream);
			return -ENOMEM;
		}

		dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
				__func__, stream->buf_num,
				stream->buf_list[stream->buf_num],
				(long long)stream->dma_addr[stream->buf_num]);
		memset(stream->buf_list[stream->buf_num], 0, size);
		stream->state |= USB_STATE_URB_BUF;
	}

	return 0;
}

int usb_urb_reconfig(struct usb_data_stream *stream,
		struct usb_data_stream_properties *props)
{
	int buf_size;

	if (!props)
		return 0;

	/* check allocated buffers are large enough for the request */
	if (props->type == USB_BULK) {
		buf_size = stream->props.u.bulk.buffersize;
	} else if (props->type == USB_ISOC) {
		buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb;
	} else {
		dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",
				KBUILD_MODNAME, props->type);
		return -EINVAL;
	}

	if (stream->buf_num < props->count || stream->buf_size < buf_size) {
		dev_err(&stream->udev->dev,
				"%s: cannot reconfigure as allocated buffers are too small\n",
				KBUILD_MODNAME);
		return -EINVAL;
	}

	/* check if all fields are same */
	if (stream->props.type == props->type &&
			stream->props.count == props->count &&
			stream->props.endpoint == props->endpoint) {
		if (props->type == USB_BULK &&
				props->u.bulk.buffersize ==
				stream->props.u.bulk.buffersize)
			return 0;
		else if (props->type == USB_ISOC &&
				props->u.isoc.framesperurb ==
				stream->props.u.isoc.framesperurb &&
				props->u.isoc.framesize ==
				stream->props.u.isoc.framesize &&
				props->u.isoc.interval ==
				stream->props.u.isoc.interval)
			return 0;
	}

	dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);

	usb_urb_free_urbs(stream);
	memcpy(&stream->props, props, sizeof(*props));
	if (props->type == USB_BULK)
		return usb_urb_alloc_bulk_urbs(stream);
	else if (props->type == USB_ISOC)
		return usb_urb_alloc_isoc_urbs(stream);

	return 0;
}

int usb_urb_initv2(struct usb_data_stream *stream,
		const struct usb_data_stream_properties *props)
{
	int ret;

	if (!stream || !props)
		return -EINVAL;

	memcpy(&stream->props, props, sizeof(*props));

	if (!stream->complete) {
		dev_err(&stream->udev->dev,
				"%s: there is no data callback - this doesn't make sense\n",
				KBUILD_MODNAME);
		return -EINVAL;
	}

	switch (stream->props.type) {
	case USB_BULK:
		ret = usb_alloc_stream_buffers(stream, stream->props.count,
				stream->props.u.bulk.buffersize);
		if (ret < 0)
			return ret;

		return usb_urb_alloc_bulk_urbs(stream);
	case USB_ISOC:
		ret = usb_alloc_stream_buffers(stream, stream->props.count,
				stream->props.u.isoc.framesize *
				stream->props.u.isoc.framesperurb);
		if (ret < 0)
			return ret;

		return usb_urb_alloc_isoc_urbs(stream);
	default:
		dev_err(&stream->udev->dev,
				"%s: unknown urb-type for data transfer\n",
				KBUILD_MODNAME);
		return -EINVAL;
	}
}

int usb_urb_exitv2(struct usb_data_stream *stream)
{
	usb_urb_free_urbs(stream);
	usb_free_stream_buffers(stream);

	return 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
c79b339f AP	2	/* usb-urb.c is part of the DVB USB library.
c79b339f AP	3	*
99e44da7	4	* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
c79b339f AP	5	* see dvb-usb-init.c for copyright information.
	6	*
	7	* This file keeps functions for initializing and handling the
	8	* BULK and ISOC USB data transfers in a generic way.
	9	* Can be used for DVB-only and also, that's the plan, for
	10	* Hybrid USB devices (analog and DVB).
	11	*/
	12	#include "dvb_usb_common.h"
	13
	14	/* URB stuff for streaming */
bce1c029 AP	15
	16	int usb_urb_reconfig(struct usb_data_stream *stream,
	17	struct usb_data_stream_properties *props);
	18
c79b339f AP	19	static void usb_urb_complete(struct urb *urb)
	20	{
	21	struct usb_data_stream *stream = urb->context;
	22	int ptype = usb_pipetype(urb->pipe);
	23	int i;
	24	u8 *b;
	25
6d7cfec4 AP	26	dev_dbg_ratelimited(&stream->udev->dev,
6d7cfec4 AP	27	"%s: %s urb completed status=%d length=%d/%d pack_num=%d errors=%d\n",
7fa8694a	28	__func__, ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
23d8e63a AP	29	urb->status, urb->actual_length,
	30	urb->transfer_buffer_length,
	31	urb->number_of_packets, urb->error_count);
c79b339f AP	32
c79b339f AP	33	switch (urb->status) {
4e60d951 AP	34	case 0: /* success */
	35	case -ETIMEDOUT: /* NAK */
	36	break;
	37	case -ECONNRESET: /* kill */
	38	case -ENOENT:
	39	case -ESHUTDOWN:
	40	return;
	41	default: /* error */
7fa8694a AP	42	dev_dbg_ratelimited(&stream->udev->dev,
7fa8694a AP	43	"%s: urb completition failed=%d\n",
d10d1b9a	44	__func__, urb->status);
4e60d951	45	break;
c79b339f AP	46	}
	47
	48	b = (u8 *) urb->transfer_buffer;
	49	switch (ptype) {
4e60d951 AP	50	case PIPE_ISOCHRONOUS:
	51	for (i = 0; i < urb->number_of_packets; i++) {
	52	if (urb->iso_frame_desc[i].status != 0)
6d7cfec4 AP	53	dev_dbg(&stream->udev->dev,
6d7cfec4 AP	54	"%s: iso frame descriptor has an error=%d\n",
d10d1b9a	55	__func__,
15072bba	56	urb->iso_frame_desc[i].status);
4e60d951 AP	57	else if (urb->iso_frame_desc[i].actual_length > 0)
	58	stream->complete(stream,
	59	b + urb->iso_frame_desc[i].offset,
	60	urb->iso_frame_desc[i].actual_length);
	61
	62	urb->iso_frame_desc[i].status = 0;
	63	urb->iso_frame_desc[i].actual_length = 0;
	64	}
4e60d951 AP	65	break;
	66	case PIPE_BULK:
	67	if (urb->actual_length > 0)
	68	stream->complete(stream, b, urb->actual_length);
	69	break;
	70	default:
6d7cfec4 AP	71	dev_err(&stream->udev->dev,
	72	"%s: unknown endpoint type in completition handler\n",
	73	KBUILD_MODNAME);
4e60d951	74	return;
c79b339f	75	}
4e60d951	76	usb_submit_urb(urb, GFP_ATOMIC);
c79b339f AP	77	}
c79b339f AP	78
59784343	79	int usb_urb_killv2(struct usb_data_stream *stream)
c79b339f AP	80	{
	81	int i;
	82	for (i = 0; i < stream->urbs_submitted; i++) {
d10d1b9a	83	dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);
c79b339f AP	84	/* stop the URB */
	85	usb_kill_urb(stream->urb_list[i]);
	86	}
	87	stream->urbs_submitted = 0;
	88	return 0;
	89	}
	90
59784343	91	int usb_urb_submitv2(struct usb_data_stream *stream,
bce1c029	92	struct usb_data_stream_properties *props)
c79b339f	93	{
4e60d951	94	int i, ret;
bce1c029 AP	95
	96	if (props) {
	97	ret = usb_urb_reconfig(stream, props);
	98	if (ret < 0)
	99	return ret;
	100	}
	101
c79b339f	102	for (i = 0; i < stream->urbs_initialized; i++) {
d10d1b9a	103	dev_dbg(&stream->udev->dev, "%s: submit urb=%d\n", __func__, i);
4e60d951 AP	104	ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC);
4e60d951 AP	105	if (ret) {
6d7cfec4 AP	106	dev_err(&stream->udev->dev,
6d7cfec4 AP	107	"%s: could not submit urb no. %d - get them all back\n",
d10d1b9a	108	KBUILD_MODNAME, i);
59784343	109	usb_urb_killv2(stream);
c79b339f AP	110	return ret;
	111	}
	112	stream->urbs_submitted++;
	113	}
	114	return 0;
	115	}
	116
691a5502	117	static int usb_urb_free_urbs(struct usb_data_stream *stream)
c79b339f	118	{
bce1c029	119	int i;
c79b339f	120
59784343	121	usb_urb_killv2(stream);
c79b339f	122
831511bd AP	123	for (i = stream->urbs_initialized - 1; i >= 0; i--) {
831511bd AP	124	if (stream->urb_list[i]) {
d10d1b9a AP	125	dev_dbg(&stream->udev->dev, "%s: free urb=%d\n",
d10d1b9a AP	126	__func__, i);
bce1c029 AP	127	/* free the URBs */
bce1c029 AP	128	usb_free_urb(stream->urb_list[i]);
c79b339f	129	}
c79b339f	130	}
bce1c029	131	stream->urbs_initialized = 0;
c79b339f AP	132
	133	return 0;
	134	}
	135
bce1c029	136	static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream)
c79b339f AP	137	{
	138	int i, j;
	139
c79b339f AP	140	/* allocate the URBs */
c79b339f AP	141	for (i = 0; i < stream->props.count; i++) {
d10d1b9a	142	dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
c79b339f AP	143	stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
c79b339f AP	144	if (!stream->urb_list[i]) {
d10d1b9a	145	dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
c79b339f AP	146	for (j = 0; j < i; j++)
	147	usb_free_urb(stream->urb_list[j]);
	148	return -ENOMEM;
	149	}
bce1c029 AP	150	usb_fill_bulk_urb(stream->urb_list[i],
bce1c029 AP	151	stream->udev,
4e60d951	152	usb_rcvbulkpipe(stream->udev,
bce1c029	153	stream->props.endpoint),
c79b339f AP	154	stream->buf_list[i],
	155	stream->props.u.bulk.buffersize,
	156	usb_urb_complete, stream);
	157
	158	stream->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
	159	stream->urb_list[i]->transfer_dma = stream->dma_addr[i];
	160	stream->urbs_initialized++;
	161	}
	162	return 0;
	163	}
	164
bce1c029	165	static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream)
c79b339f	166	{
4e60d951	167	int i, j;
c79b339f	168
c79b339f AP	169	/* allocate the URBs */
	170	for (i = 0; i < stream->props.count; i++) {
	171	struct urb *urb;
	172	int frame_offset = 0;
d10d1b9a	173	dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
4e60d951 AP	174	stream->urb_list[i] = usb_alloc_urb(
4e60d951 AP	175	stream->props.u.isoc.framesperurb, GFP_ATOMIC);
c79b339f	176	if (!stream->urb_list[i]) {
d10d1b9a	177	dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
c79b339f AP	178	for (j = 0; j < i; j++)
	179	usb_free_urb(stream->urb_list[j]);
	180	return -ENOMEM;
	181	}
	182
	183	urb = stream->urb_list[i];
	184
	185	urb->dev = stream->udev;
	186	urb->context = stream;
	187	urb->complete = usb_urb_complete;
4e60d951 AP	188	urb->pipe = usb_rcvisocpipe(stream->udev,
4e60d951 AP	189	stream->props.endpoint);
c79b339f AP	190	urb->transfer_flags = URB_ISO_ASAP \| URB_NO_TRANSFER_DMA_MAP;
	191	urb->interval = stream->props.u.isoc.interval;
	192	urb->number_of_packets = stream->props.u.isoc.framesperurb;
bce1c029 AP	193	urb->transfer_buffer_length = stream->props.u.isoc.framesize *
bce1c029 AP	194	stream->props.u.isoc.framesperurb;
c79b339f AP	195	urb->transfer_buffer = stream->buf_list[i];
	196	urb->transfer_dma = stream->dma_addr[i];
	197
	198	for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
	199	urb->iso_frame_desc[j].offset = frame_offset;
4e60d951 AP	200	urb->iso_frame_desc[j].length =
4e60d951 AP	201	stream->props.u.isoc.framesize;
c79b339f AP	202	frame_offset += stream->props.u.isoc.framesize;
	203	}
	204
	205	stream->urbs_initialized++;
	206	}
	207	return 0;
	208	}
	209
691a5502	210	static int usb_free_stream_buffers(struct usb_data_stream *stream)
bce1c029 AP	211	{
	212	if (stream->state & USB_STATE_URB_BUF) {
	213	while (stream->buf_num) {
	214	stream->buf_num--;
d10d1b9a AP	215	dev_dbg(&stream->udev->dev, "%s: free buf=%d\n",
d10d1b9a AP	216	__func__, stream->buf_num);
bce1c029 AP	217	usb_free_coherent(stream->udev, stream->buf_size,
	218	stream->buf_list[stream->buf_num],
	219	stream->dma_addr[stream->buf_num]);
	220	}
	221	}
	222
	223	stream->state &= ~USB_STATE_URB_BUF;
	224
	225	return 0;
	226	}
	227
691a5502 MCC	228	static int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num,
691a5502 MCC	229	unsigned long size)
bce1c029 AP	230	{
	231	stream->buf_num = 0;
	232	stream->buf_size = size;
	233
6d7cfec4 AP	234	dev_dbg(&stream->udev->dev,
	235	"%s: all in all I will use %lu bytes for streaming\n",
	236	__func__, num * size);
bce1c029 AP	237
bce1c029 AP	238	for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
bce1c029 AP	239	stream->buf_list[stream->buf_num] = usb_alloc_coherent(
	240	stream->udev, size, GFP_ATOMIC,
	241	&stream->dma_addr[stream->buf_num]);
831511bd	242	if (!stream->buf_list[stream->buf_num]) {
d10d1b9a AP	243	dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",
d10d1b9a AP	244	__func__, stream->buf_num);
bce1c029 AP	245	usb_free_stream_buffers(stream);
	246	return -ENOMEM;
	247	}
15072bba	248
d10d1b9a AP	249	dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
d10d1b9a AP	250	__func__, stream->buf_num,
bce1c029 AP	251	stream->buf_list[stream->buf_num],
	252	(long long)stream->dma_addr[stream->buf_num]);
	253	memset(stream->buf_list[stream->buf_num], 0, size);
	254	stream->state \|= USB_STATE_URB_BUF;
	255	}
bce1c029 AP	256
	257	return 0;
	258	}
	259
	260	int usb_urb_reconfig(struct usb_data_stream *stream,
	261	struct usb_data_stream_properties *props)
	262	{
	263	int buf_size;
	264
831511bd	265	if (!props)
bce1c029 AP	266	return 0;
	267
	268	/* check allocated buffers are large enough for the request */
15072bba	269	if (props->type == USB_BULK) {
bce1c029	270	buf_size = stream->props.u.bulk.buffersize;
15072bba	271	} else if (props->type == USB_ISOC) {
bce1c029	272	buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb;
15072bba	273	} else {
d10d1b9a AP	274	dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",
d10d1b9a AP	275	KBUILD_MODNAME, props->type);
bce1c029	276	return -EINVAL;
15072bba	277	}
bce1c029 AP	278
bce1c029 AP	279	if (stream->buf_num < props->count \|\| stream->buf_size < buf_size) {
6d7cfec4 AP	280	dev_err(&stream->udev->dev,
6d7cfec4 AP	281	"%s: cannot reconfigure as allocated buffers are too small\n",
d10d1b9a	282	KBUILD_MODNAME);
bce1c029 AP	283	return -EINVAL;
	284	}
	285
	286	/* check if all fields are same */
	287	if (stream->props.type == props->type &&
	288	stream->props.count == props->count &&
	289	stream->props.endpoint == props->endpoint) {
	290	if (props->type == USB_BULK &&
	291	props->u.bulk.buffersize ==
	292	stream->props.u.bulk.buffersize)
	293	return 0;
	294	else if (props->type == USB_ISOC &&
	295	props->u.isoc.framesperurb ==
	296	stream->props.u.isoc.framesperurb &&
	297	props->u.isoc.framesize ==
	298	stream->props.u.isoc.framesize &&
	299	props->u.isoc.interval ==
	300	stream->props.u.isoc.interval)
	301	return 0;
	302	}
	303
d10d1b9a	304	dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);
bce1c029 AP	305
	306	usb_urb_free_urbs(stream);
	307	memcpy(&stream->props, props, sizeof(*props));
	308	if (props->type == USB_BULK)
	309	return usb_urb_alloc_bulk_urbs(stream);
	310	else if (props->type == USB_ISOC)
	311	return usb_urb_alloc_isoc_urbs(stream);
	312
	313	return 0;
	314	}
	315
59784343	316	int usb_urb_initv2(struct usb_data_stream *stream,
6400a8c5	317	const struct usb_data_stream_properties *props)
c79b339f	318	{
bce1c029 AP	319	int ret;
bce1c029 AP	320
831511bd	321	if (!stream \|\| !props)
c79b339f AP	322	return -EINVAL;
	323
	324	memcpy(&stream->props, props, sizeof(*props));
	325
831511bd	326	if (!stream->complete) {
6d7cfec4 AP	327	dev_err(&stream->udev->dev,
	328	"%s: there is no data callback - this doesn't make sense\n",
	329	KBUILD_MODNAME);
c79b339f AP	330	return -EINVAL;
	331	}
	332
	333	switch (stream->props.type) {
4e60d951	334	case USB_BULK:
bce1c029 AP	335	ret = usb_alloc_stream_buffers(stream, stream->props.count,
	336	stream->props.u.bulk.buffersize);
	337	if (ret < 0)
	338	return ret;
	339
	340	return usb_urb_alloc_bulk_urbs(stream);
4e60d951	341	case USB_ISOC:
bce1c029 AP	342	ret = usb_alloc_stream_buffers(stream, stream->props.count,
	343	stream->props.u.isoc.framesize *
	344	stream->props.u.isoc.framesperurb);
	345	if (ret < 0)
	346	return ret;
	347
	348	return usb_urb_alloc_isoc_urbs(stream);
4e60d951	349	default:
6d7cfec4 AP	350	dev_err(&stream->udev->dev,
	351	"%s: unknown urb-type for data transfer\n",
	352	KBUILD_MODNAME);
4e60d951	353	return -EINVAL;
c79b339f AP	354	}
	355	}
	356
59784343	357	int usb_urb_exitv2(struct usb_data_stream *stream)
c79b339f	358	{
bce1c029	359	usb_urb_free_urbs(stream);
c79b339f	360	usb_free_stream_buffers(stream);
bce1c029	361
c79b339f AP	362	return 0;
c79b339f AP	363	}