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