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12#include "dvb_usb_common.h"
13
14
15
16int usb_urb_reconfig(struct usb_data_stream *stream,
17 struct usb_data_stream_properties *props);
18
19static 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
26 dev_dbg_ratelimited(&stream->udev->dev,
27 "%s: %s urb completed status=%d length=%d/%d pack_num=%d errors=%d\n",
28 __func__, ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
29 urb->status, urb->actual_length,
30 urb->transfer_buffer_length,
31 urb->number_of_packets, urb->error_count);
32
33 switch (urb->status) {
34 case 0:
35 case -ETIMEDOUT:
36 break;
37 case -ECONNRESET:
38 case -ENOENT:
39 case -ESHUTDOWN:
40 return;
41 default:
42 dev_dbg_ratelimited(&stream->udev->dev,
43 "%s: urb completition failed=%d\n",
44 __func__, urb->status);
45 break;
46 }
47
48 b = (u8 *) urb->transfer_buffer;
49 switch (ptype) {
50 case PIPE_ISOCHRONOUS:
51 for (i = 0; i < urb->number_of_packets; i++) {
52 if (urb->iso_frame_desc[i].status != 0)
53 dev_dbg(&stream->udev->dev,
54 "%s: iso frame descriptor has an error=%d\n",
55 __func__,
56 urb->iso_frame_desc[i].status);
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 }
65 break;
66 case PIPE_BULK:
67 if (urb->actual_length > 0)
68 stream->complete(stream, b, urb->actual_length);
69 break;
70 default:
71 dev_err(&stream->udev->dev,
72 "%s: unknown endpoint type in completition handler\n",
73 KBUILD_MODNAME);
74 return;
75 }
76 usb_submit_urb(urb, GFP_ATOMIC);
77}
78
79int usb_urb_killv2(struct usb_data_stream *stream)
80{
81 int i;
82 for (i = 0; i < stream->urbs_submitted; i++) {
83 dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);
84
85 usb_kill_urb(stream->urb_list[i]);
86 }
87 stream->urbs_submitted = 0;
88 return 0;
89}
90
91int usb_urb_submitv2(struct usb_data_stream *stream,
92 struct usb_data_stream_properties *props)
93{
94 int i, ret;
95
96 if (props) {
97 ret = usb_urb_reconfig(stream, props);
98 if (ret < 0)
99 return ret;
100 }
101
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);
105 if (ret) {
106 dev_err(&stream->udev->dev,
107 "%s: could not submit urb no. %d - get them all back\n",
108 KBUILD_MODNAME, i);
109 usb_urb_killv2(stream);
110 return ret;
111 }
112 stream->urbs_submitted++;
113 }
114 return 0;
115}
116
117static int usb_urb_free_urbs(struct usb_data_stream *stream)
118{
119 int i;
120
121 usb_urb_killv2(stream);
122
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",
126 __func__, i);
127
128 usb_free_urb(stream->urb_list[i]);
129 }
130 }
131 stream->urbs_initialized = 0;
132
133 return 0;
134}
135
136static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream)
137{
138 int i, j;
139
140
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__);
146 for (j = 0; j < i; j++)
147 usb_free_urb(stream->urb_list[j]);
148 return -ENOMEM;
149 }
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);
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
165static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream)
166{
167 int i, j;
168
169
170 for (i = 0; i < stream->props.count; i++) {
171 struct urb *urb;
172 int frame_offset = 0;
173 dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
174 stream->urb_list[i] = usb_alloc_urb(
175 stream->props.u.isoc.framesperurb, GFP_ATOMIC);
176 if (!stream->urb_list[i]) {
177 dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
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;
188 urb->pipe = usb_rcvisocpipe(stream->udev,
189 stream->props.endpoint);
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;
193 urb->transfer_buffer_length = stream->props.u.isoc.framesize *
194 stream->props.u.isoc.framesperurb;
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;
200 urb->iso_frame_desc[j].length =
201 stream->props.u.isoc.framesize;
202 frame_offset += stream->props.u.isoc.framesize;
203 }
204
205 stream->urbs_initialized++;
206 }
207 return 0;
208}
209
210static int usb_free_stream_buffers(struct usb_data_stream *stream)
211{
212 if (stream->state & USB_STATE_URB_BUF) {
213 while (stream->buf_num) {
214 stream->buf_num--;
215 dev_dbg(&stream->udev->dev, "%s: free buf=%d\n",
216 __func__, stream->buf_num);
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
228static int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num,
229 unsigned long size)
230{
231 stream->buf_num = 0;
232 stream->buf_size = size;
233
234 dev_dbg(&stream->udev->dev,
235 "%s: all in all I will use %lu bytes for streaming\n",
236 __func__, num * size);
237
238 for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
239 stream->buf_list[stream->buf_num] = usb_alloc_coherent(
240 stream->udev, size, GFP_ATOMIC,
241 &stream->dma_addr[stream->buf_num]);
242 if (!stream->buf_list[stream->buf_num]) {
243 dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",
244 __func__, stream->buf_num);
245 usb_free_stream_buffers(stream);
246 return -ENOMEM;
247 }
248
249 dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
250 __func__, stream->buf_num,
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 }
256
257 return 0;
258}
259
260int usb_urb_reconfig(struct usb_data_stream *stream,
261 struct usb_data_stream_properties *props)
262{
263 int buf_size;
264
265 if (!props)
266 return 0;
267
268
269 if (props->type == USB_BULK) {
270 buf_size = stream->props.u.bulk.buffersize;
271 } else if (props->type == USB_ISOC) {
272 buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb;
273 } else {
274 dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",
275 KBUILD_MODNAME, props->type);
276 return -EINVAL;
277 }
278
279 if (stream->buf_num < props->count || stream->buf_size < buf_size) {
280 dev_err(&stream->udev->dev,
281 "%s: cannot reconfigure as allocated buffers are too small\n",
282 KBUILD_MODNAME);
283 return -EINVAL;
284 }
285
286
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
304 dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);
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
316int usb_urb_initv2(struct usb_data_stream *stream,
317 const struct usb_data_stream_properties *props)
318{
319 int ret;
320
321 if (!stream || !props)
322 return -EINVAL;
323
324 memcpy(&stream->props, props, sizeof(*props));
325
326 if (!stream->complete) {
327 dev_err(&stream->udev->dev,
328 "%s: there is no data callback - this doesn't make sense\n",
329 KBUILD_MODNAME);
330 return -EINVAL;
331 }
332
333 switch (stream->props.type) {
334 case USB_BULK:
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);
341 case USB_ISOC:
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);
349 default:
350 dev_err(&stream->udev->dev,
351 "%s: unknown urb-type for data transfer\n",
352 KBUILD_MODNAME);
353 return -EINVAL;
354 }
355}
356
357int usb_urb_exitv2(struct usb_data_stream *stream)
358{
359 usb_urb_free_urbs(stream);
360 usb_free_stream_buffers(stream);
361
362 return 0;
363}
364
