1 // SPDX-License-Identifier: GPL-2.0
2 /* usb-urb.c is part of the DVB USB library.
4  * Copyright (C) 2004-6 Patrick Boettcher ([email protected])
5  * see dvb-usb-init.c for copyright information.
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
21 	struct usb_data_stream *stream = urb->context;  in usb_urb_complete()
22 	int ptype = usb_pipetype(urb->pipe);  in usb_urb_complete()
26 	dev_dbg_ratelimited(&stream->udev->dev,  in usb_urb_complete()
28 			__func__, ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",  in usb_urb_complete()
29 			urb->status, urb->actual_length,  in usb_urb_complete()
30 			urb->transfer_buffer_length,  in usb_urb_complete()
31 			urb->number_of_packets, urb->error_count);  in usb_urb_complete()
33 	switch (urb->status) {  in usb_urb_complete()
35 	case -ETIMEDOUT:    /* NAK */  in usb_urb_complete()
37 	case -ECONNRESET:   /* kill */  in usb_urb_complete()
38 	case -ENOENT:  in usb_urb_complete()
39 	case -ESHUTDOWN:  in usb_urb_complete()
42 		dev_dbg_ratelimited(&stream->udev->dev,  in usb_urb_complete()
44 				__func__, urb->status);  in usb_urb_complete()
48 	b = (u8 *) urb->transfer_buffer;  in usb_urb_complete()
51 		for (i = 0; i < urb->number_of_packets; i++) {  in usb_urb_complete()
52 			if (urb->iso_frame_desc[i].status != 0)  in usb_urb_complete()
53 				dev_dbg(&stream->udev->dev,  in usb_urb_complete()
56 						urb->iso_frame_desc[i].status);  in usb_urb_complete()
57 			else if (urb->iso_frame_desc[i].actual_length > 0)  in usb_urb_complete()
58 				stream->complete(stream,  in usb_urb_complete()
59 					b + urb->iso_frame_desc[i].offset,  in usb_urb_complete()
60 					urb->iso_frame_desc[i].actual_length);  in usb_urb_complete()
62 			urb->iso_frame_desc[i].status = 0;  in usb_urb_complete()
63 			urb->iso_frame_desc[i].actual_length = 0;  in usb_urb_complete()
67 		if (urb->actual_length > 0)  in usb_urb_complete()
68 			stream->complete(stream, b, urb->actual_length);  in usb_urb_complete()
71 		dev_err(&stream->udev->dev,  in usb_urb_complete()
72 				"%s: unknown endpoint type in completion handler\n",  in usb_urb_complete()
82 	for (i = 0; i < stream->urbs_submitted; i++) {  in usb_urb_killv2()
83 		dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);  in usb_urb_killv2()
85 		usb_kill_urb(stream->urb_list[i]);  in usb_urb_killv2()
87 	stream->urbs_submitted = 0;  in usb_urb_killv2()
102 	for (i = 0; i < stream->urbs_initialized; i++) {  in usb_urb_submitv2()
103 		dev_dbg(&stream->udev->dev, "%s: submit urb=%d\n", __func__, i);  in usb_urb_submitv2()
104 		ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC);  in usb_urb_submitv2()
106 			dev_err(&stream->udev->dev,  in usb_urb_submitv2()
107 					"%s: could not submit urb no. %d - get them all back\n",  in usb_urb_submitv2()
112 		stream->urbs_submitted++;  in usb_urb_submitv2()
123 	for (i = stream->urbs_initialized - 1; i >= 0; i--) {  in usb_urb_free_urbs()
124 		if (stream->urb_list[i]) {  in usb_urb_free_urbs()
125 			dev_dbg(&stream->udev->dev, "%s: free urb=%d\n",  in usb_urb_free_urbs()
128 			usb_free_urb(stream->urb_list[i]);  in usb_urb_free_urbs()
131 	stream->urbs_initialized = 0;  in usb_urb_free_urbs()
141 	for (i = 0; i < stream->props.count; i++) {  in usb_urb_alloc_bulk_urbs()
142 		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);  in usb_urb_alloc_bulk_urbs()
143 		stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);  in usb_urb_alloc_bulk_urbs()
144 		if (!stream->urb_list[i]) {  in usb_urb_alloc_bulk_urbs()
145 			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);  in usb_urb_alloc_bulk_urbs()
147 				usb_free_urb(stream->urb_list[j]);  in usb_urb_alloc_bulk_urbs()
148 			return -ENOMEM;  in usb_urb_alloc_bulk_urbs()
150 		usb_fill_bulk_urb(stream->urb_list[i],  in usb_urb_alloc_bulk_urbs()
151 				stream->udev,  in usb_urb_alloc_bulk_urbs()
152 				usb_rcvbulkpipe(stream->udev,  in usb_urb_alloc_bulk_urbs()
153 						stream->props.endpoint),  in usb_urb_alloc_bulk_urbs()
154 				stream->buf_list[i],  in usb_urb_alloc_bulk_urbs()
155 				stream->props.u.bulk.buffersize,  in usb_urb_alloc_bulk_urbs()
158 		stream->urbs_initialized++;  in usb_urb_alloc_bulk_urbs()
168 	for (i = 0; i < stream->props.count; i++) {  in usb_urb_alloc_isoc_urbs()
171 		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);  in usb_urb_alloc_isoc_urbs()
172 		stream->urb_list[i] = usb_alloc_urb(  in usb_urb_alloc_isoc_urbs()
173 				stream->props.u.isoc.framesperurb, GFP_ATOMIC);  in usb_urb_alloc_isoc_urbs()
174 		if (!stream->urb_list[i]) {  in usb_urb_alloc_isoc_urbs()
175 			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);  in usb_urb_alloc_isoc_urbs()
177 				usb_free_urb(stream->urb_list[j]);  in usb_urb_alloc_isoc_urbs()
178 			return -ENOMEM;  in usb_urb_alloc_isoc_urbs()
181 		urb = stream->urb_list[i];  in usb_urb_alloc_isoc_urbs()
183 		urb->dev = stream->udev;  in usb_urb_alloc_isoc_urbs()
184 		urb->context = stream;  in usb_urb_alloc_isoc_urbs()
185 		urb->complete = usb_urb_complete;  in usb_urb_alloc_isoc_urbs()
186 		urb->pipe = usb_rcvisocpipe(stream->udev,  in usb_urb_alloc_isoc_urbs()
187 				stream->props.endpoint);  in usb_urb_alloc_isoc_urbs()
188 		urb->transfer_flags = URB_ISO_ASAP;  in usb_urb_alloc_isoc_urbs()
189 		urb->interval = stream->props.u.isoc.interval;  in usb_urb_alloc_isoc_urbs()
190 		urb->number_of_packets = stream->props.u.isoc.framesperurb;  in usb_urb_alloc_isoc_urbs()
191 		urb->transfer_buffer_length = stream->props.u.isoc.framesize *  in usb_urb_alloc_isoc_urbs()
192 				stream->props.u.isoc.framesperurb;  in usb_urb_alloc_isoc_urbs()
193 		urb->transfer_buffer = stream->buf_list[i];  in usb_urb_alloc_isoc_urbs()
195 		for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {  in usb_urb_alloc_isoc_urbs()
196 			urb->iso_frame_desc[j].offset = frame_offset;  in usb_urb_alloc_isoc_urbs()
197 			urb->iso_frame_desc[j].length =  in usb_urb_alloc_isoc_urbs()
198 					stream->props.u.isoc.framesize;  in usb_urb_alloc_isoc_urbs()
199 			frame_offset += stream->props.u.isoc.framesize;  in usb_urb_alloc_isoc_urbs()
202 		stream->urbs_initialized++;  in usb_urb_alloc_isoc_urbs()
209 	if (stream->state & USB_STATE_URB_BUF) {  in usb_free_stream_buffers()
210 		while (stream->buf_num) {  in usb_free_stream_buffers()
211 			stream->buf_num--;  in usb_free_stream_buffers()
212 			kfree(stream->buf_list[stream->buf_num]);  in usb_free_stream_buffers()
216 	stream->state &= ~USB_STATE_URB_BUF;  in usb_free_stream_buffers()
224 	stream->buf_num = 0;  in usb_alloc_stream_buffers()
225 	stream->buf_size = size;  in usb_alloc_stream_buffers()
227 	dev_dbg(&stream->udev->dev,  in usb_alloc_stream_buffers()
228 			"%s: all in all I will use %lu bytes for streaming\n",  in usb_alloc_stream_buffers()
231 	for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {  in usb_alloc_stream_buffers()
232 		stream->buf_list[stream->buf_num] = kzalloc(size, GFP_ATOMIC);  in usb_alloc_stream_buffers()
233 		if (!stream->buf_list[stream->buf_num]) {  in usb_alloc_stream_buffers()
234 			dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",  in usb_alloc_stream_buffers()
235 					__func__, stream->buf_num);  in usb_alloc_stream_buffers()
237 			return -ENOMEM;  in usb_alloc_stream_buffers()
240 		dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",  in usb_alloc_stream_buffers()
241 				__func__, stream->buf_num,  in usb_alloc_stream_buffers()
242 				stream->buf_list[stream->buf_num],  in usb_alloc_stream_buffers()
243 				(long long)stream->dma_addr[stream->buf_num]);  in usb_alloc_stream_buffers()
244 		stream->state |= USB_STATE_URB_BUF;  in usb_alloc_stream_buffers()
259 	if (props->type == USB_BULK) {  in usb_urb_reconfig()
260 		buf_size = stream->props.u.bulk.buffersize;  in usb_urb_reconfig()
261 	} else if (props->type == USB_ISOC) {  in usb_urb_reconfig()
262 		buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb;  in usb_urb_reconfig()
264 		dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",  in usb_urb_reconfig()
265 				KBUILD_MODNAME, props->type);  in usb_urb_reconfig()
266 		return -EINVAL;  in usb_urb_reconfig()
269 	if (stream->buf_num < props->count || stream->buf_size < buf_size) {  in usb_urb_reconfig()
270 		dev_err(&stream->udev->dev,  in usb_urb_reconfig()
273 		return -EINVAL;  in usb_urb_reconfig()
277 	if (stream->props.type == props->type &&  in usb_urb_reconfig()
278 			stream->props.count == props->count &&  in usb_urb_reconfig()
279 			stream->props.endpoint == props->endpoint) {  in usb_urb_reconfig()
280 		if (props->type == USB_BULK &&  in usb_urb_reconfig()
281 				props->u.bulk.buffersize ==  in usb_urb_reconfig()
282 				stream->props.u.bulk.buffersize)  in usb_urb_reconfig()
284 		else if (props->type == USB_ISOC &&  in usb_urb_reconfig()
285 				props->u.isoc.framesperurb ==  in usb_urb_reconfig()
286 				stream->props.u.isoc.framesperurb &&  in usb_urb_reconfig()
287 				props->u.isoc.framesize ==  in usb_urb_reconfig()
288 				stream->props.u.isoc.framesize &&  in usb_urb_reconfig()
289 				props->u.isoc.interval ==  in usb_urb_reconfig()
290 				stream->props.u.isoc.interval)  in usb_urb_reconfig()
294 	dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);  in usb_urb_reconfig()
297 	memcpy(&stream->props, props, sizeof(*props));  in usb_urb_reconfig()
298 	if (props->type == USB_BULK)  in usb_urb_reconfig()
300 	else if (props->type == USB_ISOC)  in usb_urb_reconfig()
312 		return -EINVAL;  in usb_urb_initv2()
314 	memcpy(&stream->props, props, sizeof(*props));  in usb_urb_initv2()
316 	if (!stream->complete) {  in usb_urb_initv2()
317 		dev_err(&stream->udev->dev,  in usb_urb_initv2()
318 				"%s: there is no data callback - this doesn't make sense\n",  in usb_urb_initv2()
320 		return -EINVAL;  in usb_urb_initv2()
323 	switch (stream->props.type) {  in usb_urb_initv2()
325 		ret = usb_alloc_stream_buffers(stream, stream->props.count,  in usb_urb_initv2()
326 				stream->props.u.bulk.buffersize);  in usb_urb_initv2()
332 		ret = usb_alloc_stream_buffers(stream, stream->props.count,  in usb_urb_initv2()
333 				stream->props.u.isoc.framesize *  in usb_urb_initv2()
334 				stream->props.u.isoc.framesperurb);  in usb_urb_initv2()
340 		dev_err(&stream->udev->dev,  in usb_urb_initv2()
341 				"%s: unknown urb-type for data transfer\n",  in usb_urb_initv2()
343 		return -EINVAL;  in usb_urb_initv2()