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
12 #include "dvb-usb-common.h"
17 	struct usb_data_stream *stream = urb->context;  in usb_urb_complete()
18 	int ptype = usb_pipetype(urb->pipe);  in usb_urb_complete()
23 		ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",  in usb_urb_complete()
24 		urb->status,urb->actual_length,urb->transfer_buffer_length,  in usb_urb_complete()
25 		urb->number_of_packets,urb->error_count);  in usb_urb_complete()
27 	switch (urb->status) {  in usb_urb_complete()
29 		case -ETIMEDOUT:    /* NAK */  in usb_urb_complete()
31 		case -ECONNRESET:   /* kill */  in usb_urb_complete()
32 		case -ENOENT:  in usb_urb_complete()
33 		case -ESHUTDOWN:  in usb_urb_complete()
36 			deb_ts("urb completion error %d.\n", urb->status);  in usb_urb_complete()
40 	b = (u8 *) urb->transfer_buffer;  in usb_urb_complete()
43 			for (i = 0; i < urb->number_of_packets; i++) {  in usb_urb_complete()
45 				if (urb->iso_frame_desc[i].status != 0)  in usb_urb_complete()
46 					deb_ts("iso frame descriptor has an error: %d\n",urb->iso_frame_desc[i].status);  in usb_urb_complete()
47 				else if (urb->iso_frame_desc[i].actual_length > 0)  in usb_urb_complete()
48 …	stream->complete(stream, b + urb->iso_frame_desc[i].offset, urb->iso_frame_desc[i].actual_length);  in usb_urb_complete()
50 				urb->iso_frame_desc[i].status = 0;  in usb_urb_complete()
51 				urb->iso_frame_desc[i].actual_length = 0;  in usb_urb_complete()
56 			if (urb->actual_length > 0)  in usb_urb_complete()
57 				stream->complete(stream, b, urb->actual_length);  in usb_urb_complete()
60 			err("unknown endpoint type in completion handler.");  in usb_urb_complete()
69 	for (i = 0; i < stream->urbs_submitted; i++) {  in usb_urb_kill()
73 		usb_kill_urb(stream->urb_list[i]);  in usb_urb_kill()
75 	stream->urbs_submitted = 0;  in usb_urb_kill()
82 	for (i = 0; i < stream->urbs_initialized; i++) {  in usb_urb_submit()
84 		if ((ret = usb_submit_urb(stream->urb_list[i],GFP_ATOMIC))) {  in usb_urb_submit()
85 			err("could not submit URB no. %d - get them all back",i);  in usb_urb_submit()
89 		stream->urbs_submitted++;  in usb_urb_submit()
96 	if (stream->state & USB_STATE_URB_BUF) {  in usb_free_stream_buffers()
97 		while (stream->buf_num) {  in usb_free_stream_buffers()
98 			stream->buf_num--;  in usb_free_stream_buffers()
99 			deb_mem("freeing buffer %d\n",stream->buf_num);  in usb_free_stream_buffers()
100 			usb_free_coherent(stream->udev, stream->buf_size,  in usb_free_stream_buffers()
101 					  stream->buf_list[stream->buf_num],  in usb_free_stream_buffers()
102 					  stream->dma_addr[stream->buf_num]);  in usb_free_stream_buffers()
106 	stream->state &= ~USB_STATE_URB_BUF;  in usb_free_stream_buffers()
113 	stream->buf_num = 0;  in usb_allocate_stream_buffers()
114 	stream->buf_size = size;  in usb_allocate_stream_buffers()
116 	deb_mem("all in all I will use %lu bytes for streaming\n",num*size);  in usb_allocate_stream_buffers()
118 	for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {  in usb_allocate_stream_buffers()
119 		deb_mem("allocating buffer %d\n",stream->buf_num);  in usb_allocate_stream_buffers()
120 		if (( stream->buf_list[stream->buf_num] =  in usb_allocate_stream_buffers()
121 					usb_alloc_coherent(stream->udev, size, GFP_KERNEL,  in usb_allocate_stream_buffers()
122 					&stream->dma_addr[stream->buf_num]) ) == NULL) {  in usb_allocate_stream_buffers()
123 			deb_mem("not enough memory for urb-buffer allocation.\n");  in usb_allocate_stream_buffers()
125 			return -ENOMEM;  in usb_allocate_stream_buffers()
128 			stream->buf_num,  in usb_allocate_stream_buffers()
129 stream->buf_list[stream->buf_num], (long long)stream->dma_addr[stream->buf_num]);  in usb_allocate_stream_buffers()
130 		memset(stream->buf_list[stream->buf_num],0,size);  in usb_allocate_stream_buffers()
131 		stream->state |= USB_STATE_URB_BUF;  in usb_allocate_stream_buffers()
142 	if ((i = usb_allocate_stream_buffers(stream,stream->props.count,  in usb_bulk_urb_init()
143 					stream->props.u.bulk.buffersize)) < 0)  in usb_bulk_urb_init()
147 	for (i = 0; i < stream->props.count; i++) {  in usb_bulk_urb_init()
148 		stream->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL);  in usb_bulk_urb_init()
149 		if (!stream->urb_list[i]) {  in usb_bulk_urb_init()
152 				usb_free_urb(stream->urb_list[j]);  in usb_bulk_urb_init()
153 			return -ENOMEM;  in usb_bulk_urb_init()
155 		usb_fill_bulk_urb( stream->urb_list[i], stream->udev,  in usb_bulk_urb_init()
156 				usb_rcvbulkpipe(stream->udev,stream->props.endpoint),  in usb_bulk_urb_init()
157 				stream->buf_list[i],  in usb_bulk_urb_init()
158 				stream->props.u.bulk.buffersize,  in usb_bulk_urb_init()
161 		stream->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;  in usb_bulk_urb_init()
162 		stream->urb_list[i]->transfer_dma = stream->dma_addr[i];  in usb_bulk_urb_init()
163 		stream->urbs_initialized++;  in usb_bulk_urb_init()
172 	if ((i = usb_allocate_stream_buffers(stream,stream->props.count,  in usb_isoc_urb_init()
173 					stream->props.u.isoc.framesize*stream->props.u.isoc.framesperurb)) < 0)  in usb_isoc_urb_init()
177 	for (i = 0; i < stream->props.count; i++) {  in usb_isoc_urb_init()
181 		stream->urb_list[i] = usb_alloc_urb(stream->props.u.isoc.framesperurb, GFP_KERNEL);  in usb_isoc_urb_init()
182 		if (!stream->urb_list[i]) {  in usb_isoc_urb_init()
185 				usb_free_urb(stream->urb_list[j]);  in usb_isoc_urb_init()
186 			return -ENOMEM;  in usb_isoc_urb_init()
189 		urb = stream->urb_list[i];  in usb_isoc_urb_init()
191 		urb->dev = stream->udev;  in usb_isoc_urb_init()
192 		urb->context = stream;  in usb_isoc_urb_init()
193 		urb->complete = usb_urb_complete;  in usb_isoc_urb_init()
194 		urb->pipe = usb_rcvisocpipe(stream->udev,stream->props.endpoint);  in usb_isoc_urb_init()
195 		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;  in usb_isoc_urb_init()
196 		urb->interval = stream->props.u.isoc.interval;  in usb_isoc_urb_init()
197 		urb->number_of_packets = stream->props.u.isoc.framesperurb;  in usb_isoc_urb_init()
198 		urb->transfer_buffer_length = stream->buf_size;  in usb_isoc_urb_init()
199 		urb->transfer_buffer = stream->buf_list[i];  in usb_isoc_urb_init()
200 		urb->transfer_dma = stream->dma_addr[i];  in usb_isoc_urb_init()
202 		for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {  in usb_isoc_urb_init()
203 			urb->iso_frame_desc[j].offset = frame_offset;  in usb_isoc_urb_init()
204 			urb->iso_frame_desc[j].length = stream->props.u.isoc.framesize;  in usb_isoc_urb_init()
205 			frame_offset += stream->props.u.isoc.framesize;  in usb_isoc_urb_init()
208 		stream->urbs_initialized++;  in usb_isoc_urb_init()
216 		return -EINVAL;  in usb_urb_init()
218 	memcpy(&stream->props, props, sizeof(*props));  in usb_urb_init()
220 	usb_clear_halt(stream->udev,usb_rcvbulkpipe(stream->udev,stream->props.endpoint));  in usb_urb_init()
222 	if (stream->complete == NULL) {  in usb_urb_init()
223 		err("there is no data callback - this doesn't make sense.");  in usb_urb_init()
224 		return -EINVAL;  in usb_urb_init()
227 	switch (stream->props.type) {  in usb_urb_init()
233 			err("unknown URB-type for data transfer.");  in usb_urb_init()
234 			return -EINVAL;  in usb_urb_init()
244 	for (i = 0; i < stream->urbs_initialized; i++) {  in usb_urb_exit()
245 		if (stream->urb_list[i] != NULL) {  in usb_urb_exit()
248 			usb_free_urb(stream->urb_list[i]);  in usb_urb_exit()
251 	stream->urbs_initialized = 0;  in usb_urb_exit()