usb/dvb-usb-v2/usb_urb.c

16 int usb_urb_reconfig(struct usb_data_stream *stream,
21 	struct usb_data_stream *stream = urb->context;
26 	dev_dbg_ratelimited(&stream->udev->dev,
42 		dev_dbg_ratelimited(&stream->udev->dev,
53 				dev_dbg(&stream->udev->dev,
58 				stream->complete(stream,
68 			stream->complete(stream, b, urb->actual_length);
71 		dev_err(&stream->udev->dev,
79 int usb_urb_killv2(struct usb_data_stream *stream)
82 	for (i = 0; i < stream->urbs_submitted; i++) {
83 		dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);
85 		usb_kill_urb(stream->urb_list[i]);
87 	stream->urbs_submitted = 0;
91 int usb_urb_submitv2(struct usb_data_stream *stream,
97 		ret = usb_urb_reconfig(stream, props);
102 	for (i = 0; i < stream->urbs_initialized; i++) {
103 		dev_dbg(&stream->udev->dev, "%s: submit urb=%d\n", __func__, i);
104 		ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC);
106 			dev_err(&stream->udev->dev,
109 			usb_urb_killv2(stream);
112 		stream->urbs_submitted++;
117 static int usb_urb_free_urbs(struct usb_data_stream *stream)
121 	usb_urb_killv2(stream);
123 	for (i = stream->urbs_initialized - 1; i >= 0; i--) {
124 		if (stream->urb_list[i]) {
125 			dev_dbg(&stream->udev->dev, "%s: free urb=%d\n",
128 			usb_free_urb(stream->urb_list[i]);
131 	stream->urbs_initialized = 0;
136 static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream)
141 	for (i = 0; i < stream->props.count; i++) {
142 		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
143 		stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
144 		if (!stream->urb_list[i]) {
145 			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
147 				usb_free_urb(stream->urb_list[j]);
150 		usb_fill_bulk_urb(stream->urb_list[i],
151 				stream->udev,
152 				usb_rcvbulkpipe(stream->udev,
153 						stream->props.endpoint),
154 				stream->buf_list[i],
155 				stream->props.u.bulk.buffersize,
156 				usb_urb_complete, stream);
158 		stream->urbs_initialized++;
163 static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream)
168 	for (i = 0; i < stream->props.count; i++) {
171 		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
172 		stream->urb_list[i] = usb_alloc_urb(
173 				stream->props.u.isoc.framesperurb, GFP_ATOMIC);
174 		if (!stream->urb_list[i]) {
175 			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
177 				usb_free_urb(stream->urb_list[j]);
181 		urb = stream->urb_list[i];
183 		urb->dev = stream->udev;
184 		urb->context = stream;
186 		urb->pipe = usb_rcvisocpipe(stream->udev,
187 				stream->props.endpoint);
189 		urb->interval = stream->props.u.isoc.interval;
190 		urb->number_of_packets = stream->props.u.isoc.framesperurb;
191 		urb->transfer_buffer_length = stream->props.u.isoc.framesize *
192 				stream->props.u.isoc.framesperurb;
193 		urb->transfer_buffer = stream->buf_list[i];
195 		for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
198 					stream->props.u.isoc.framesize;
199 			frame_offset += stream->props.u.isoc.framesize;
202 		stream->urbs_initialized++;
207 static int usb_free_stream_buffers(struct usb_data_stream *stream)
209 	if (stream->state & USB_STATE_URB_BUF) {
210 		while (stream->buf_num) {
211 			stream->buf_num--;
212 			kfree(stream->buf_list[stream->buf_num]);
216 	stream->state &= ~USB_STATE_URB_BUF;
221 static int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num,
224 	stream->buf_num = 0;
225 	stream->buf_size = size;
227 	dev_dbg(&stream->udev->dev,
231 	for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
232 		stream->buf_list[stream->buf_num] = kzalloc(size, GFP_ATOMIC);
233 		if (!stream->buf_list[stream->buf_num]) {
234 			dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",
235 					__func__, stream->buf_num);
236 			usb_free_stream_buffers(stream);
240 		dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
241 				__func__, stream->buf_num,
242 				stream->buf_list[stream->buf_num],
243 				(long long)stream->dma_addr[stream->buf_num]);
244 		stream->state |= USB_STATE_URB_BUF;
250 int usb_urb_reconfig(struct usb_data_stream *stream,
260 		buf_size = stream->props.u.bulk.buffersize;
264 		dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",
269 	if (stream->buf_num < props->count || stream->buf_size < buf_size) {
270 		dev_err(&stream->udev->dev,
277 	if (stream->props.type == props->type &&
278 			stream->props.count == props->count &&
279 			stream->props.endpoint == props->endpoint) {
282 				stream->props.u.bulk.buffersize)
286 				stream->props.u.isoc.framesperurb &&
288 				stream->props.u.isoc.framesize &&
290 				stream->props.u.isoc.interval)
294 	dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);
296 	usb_urb_free_urbs(stream);
297 	memcpy(&stream->props, props, sizeof(*props));
299 		return usb_urb_alloc_bulk_urbs(stream);
301 		return usb_urb_alloc_isoc_urbs(stream);
306 int usb_urb_initv2(struct usb_data_stream *stream,
311 	if (!stream || !props)
314 	memcpy(&stream->props, props, sizeof(*props));
316 	if (!stream->complete) {
317 		dev_err(&stream->udev->dev,
323 	switch (stream->props.type) {
325 		ret = usb_alloc_stream_buffers(stream, stream->props.count,
326 				stream->props.u.bulk.buffersize);
330 		return usb_urb_alloc_bulk_urbs(stream);
332 		ret = usb_alloc_stream_buffers(stream, stream->props.count,
333 				stream->props.u.isoc.framesize *
334 				stream->props.u.isoc.framesperurb);
338 		return usb_urb_alloc_isoc_urbs(stream);
340 		dev_err(&stream->udev->dev,
347 int usb_urb_exitv2(struct usb_data_stream *stream)
349 	usb_urb_free_urbs(stream);
350 	usb_free_stream_buffers(stream);