source: mainline/uspace/drv/bus/usb/vhc/transfer.c@ db51a6a6

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since db51a6a6 was db51a6a6, checked in by Ondřej Hlavatý <aearsis@…>, 7 years ago

typo: transferred is spelled with two r
  • Property mode set to 100644
File size: 7.9 KB
Line 
1/*
2 * Copyright (c) 2011 Vojtech Horky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <errno.h>
30#include <str_error.h>
31#include <usb/debug.h>
32#include <usbvirt/device.h>
33#include <usb/host/bandwidth.h>
34#include <usb/host/endpoint.h>
35#include <usb/host/usb_transfer_batch.h>
36#include <usbvirt/ipc.h>
37#include "vhcd.h"
38#include "hub/virthub.h"
39
40static bool is_set_address_transfer(vhc_transfer_t *transfer)
41{
42 if (transfer->batch.target.endpoint != 0) {
43 return false;
44 }
45 if (transfer->batch.ep->transfer_type != USB_TRANSFER_CONTROL) {
46 return false;
47 }
48 if (transfer->batch.dir != USB_DIRECTION_OUT) {
49 return false;
50 }
51 const usb_device_request_setup_packet_t *setup
52 = &transfer->batch.setup.packet;
53 if (setup->request_type != 0) {
54 return false;
55 }
56 if (setup->request != USB_DEVREQ_SET_ADDRESS) {
57 return false;
58 }
59
60 return true;
61}
62
63static int process_transfer_local(usb_transfer_batch_t *batch,
64 usbvirt_device_t *dev, size_t *actual_data_size)
65{
66 int rc;
67
68 const usb_direction_t dir = batch->dir;
69
70 if (batch->ep->transfer_type == USB_TRANSFER_CONTROL) {
71 if (dir == USB_DIRECTION_IN) {
72 rc = usbvirt_control_read(dev,
73 batch->setup.buffer, USB_SETUP_PACKET_SIZE,
74 batch->buffer, batch->buffer_size,
75 actual_data_size);
76 } else {
77 assert(dir == USB_DIRECTION_OUT);
78 rc = usbvirt_control_write(dev,
79 batch->setup.buffer, USB_SETUP_PACKET_SIZE,
80 batch->buffer, batch->buffer_size);
81 }
82 } else {
83 if (dir == USB_DIRECTION_IN) {
84 rc = usbvirt_data_in(dev, batch->ep->transfer_type,
85 batch->ep->endpoint,
86 batch->buffer, batch->buffer_size,
87 actual_data_size);
88 } else {
89 assert(dir == USB_DIRECTION_OUT);
90 rc = usbvirt_data_out(dev, batch->ep->transfer_type,
91 batch->ep->endpoint,
92 batch->buffer, batch->buffer_size);
93 }
94 }
95
96 return rc;
97}
98
99static int process_transfer_remote(usb_transfer_batch_t *batch,
100 async_sess_t *sess, size_t *actual_data_size)
101{
102 int rc;
103
104 const usb_direction_t dir = batch->dir;
105
106 if (batch->ep->transfer_type == USB_TRANSFER_CONTROL) {
107 if (dir == USB_DIRECTION_IN) {
108 rc = usbvirt_ipc_send_control_read(sess,
109 batch->setup.buffer, USB_SETUP_PACKET_SIZE,
110 batch->buffer, batch->buffer_size,
111 actual_data_size);
112 } else {
113 assert(dir == USB_DIRECTION_OUT);
114 rc = usbvirt_ipc_send_control_write(sess,
115 batch->setup.buffer, USB_SETUP_PACKET_SIZE,
116 batch->buffer, batch->buffer_size);
117 }
118 } else {
119 if (dir == USB_DIRECTION_IN) {
120 rc = usbvirt_ipc_send_data_in(sess, batch->ep->endpoint,
121 batch->ep->transfer_type,
122 batch->buffer, batch->buffer_size,
123 actual_data_size);
124 } else {
125 assert(dir == USB_DIRECTION_OUT);
126 rc = usbvirt_ipc_send_data_out(sess, batch->ep->endpoint,
127 batch->ep->transfer_type,
128 batch->buffer, batch->buffer_size);
129 }
130 }
131
132 return rc;
133}
134
135static vhc_transfer_t *dequeue_first_transfer(vhc_virtdev_t *dev)
136{
137 assert(fibril_mutex_is_locked(&dev->guard));
138 assert(!list_empty(&dev->transfer_queue));
139
140 vhc_transfer_t *transfer = list_get_instance(
141 list_first(&dev->transfer_queue), vhc_transfer_t, link);
142 list_remove(&transfer->link);
143
144 return transfer;
145}
146
147static void execute_transfer_callback_and_free(vhc_transfer_t *transfer,
148 size_t data_transfer_size, int outcome)
149{
150 assert(outcome != ENAK);
151 assert(transfer);
152 transfer->batch.error = outcome;
153 transfer->batch.transferred_size = data_transfer_size;
154 usb_transfer_batch_finish(&transfer->batch);
155}
156
157static usb_transfer_batch_t *batch_create(endpoint_t *ep)
158{
159 vhc_transfer_t *transfer = calloc(1, sizeof(vhc_transfer_t));
160 usb_transfer_batch_init(&transfer->batch, ep);
161 link_initialize(&transfer->link);
162 return &transfer->batch;
163}
164
165static const bus_ops_t vhc_bus_ops = {
166 .parent = &usb2_bus_ops,
167
168 .endpoint_count_bw = bandwidth_count_usb11,
169 .batch_create = batch_create,
170 .batch_schedule = vhc_schedule,
171};
172
173int vhc_init(vhc_data_t *instance)
174{
175 assert(instance);
176 list_initialize(&instance->devices);
177 fibril_mutex_initialize(&instance->guard);
178 usb2_bus_init(&instance->bus, BANDWIDTH_AVAILABLE_USB11);
179 instance->bus.base.ops = &vhc_bus_ops;
180 return virthub_init(&instance->hub, "root hub");
181}
182
183int vhc_schedule(usb_transfer_batch_t *batch)
184{
185 assert(batch);
186 vhc_transfer_t *transfer = (vhc_transfer_t *) batch;
187 vhc_data_t *vhc = bus_to_vhc(endpoint_get_bus(batch->ep));
188 assert(vhc);
189
190 fibril_mutex_lock(&vhc->guard);
191
192 int targets = 0;
193
194 list_foreach(vhc->devices, link, vhc_virtdev_t, dev) {
195 fibril_mutex_lock(&dev->guard);
196 if (dev->address == transfer->batch.target.address) {
197 if (!targets) {
198 list_append(&transfer->link, &dev->transfer_queue);
199 }
200 ++targets;
201 }
202 fibril_mutex_unlock(&dev->guard);
203 }
204
205 fibril_mutex_unlock(&vhc->guard);
206
207 if (targets > 1)
208 usb_log_warning("Transfer would be accepted by more devices!");
209
210 return targets ? EOK : ENOENT;
211}
212
213int vhc_transfer_queue_processor(void *arg)
214{
215 vhc_virtdev_t *dev = arg;
216 fibril_mutex_lock(&dev->guard);
217 while (dev->plugged) {
218 if (list_empty(&dev->transfer_queue)) {
219 fibril_mutex_unlock(&dev->guard);
220 async_usleep(10 * 1000);
221 fibril_mutex_lock(&dev->guard);
222 continue;
223 }
224
225 vhc_transfer_t *transfer = dequeue_first_transfer(dev);
226 fibril_mutex_unlock(&dev->guard);
227
228 int rc = EOK;
229 size_t data_transfer_size = 0;
230 if (dev->dev_sess) {
231 rc = process_transfer_remote(&transfer->batch,
232 dev->dev_sess, &data_transfer_size);
233 } else if (dev->dev_local != NULL) {
234 rc = process_transfer_local(&transfer->batch,
235 dev->dev_local, &data_transfer_size);
236 } else {
237 usb_log_warning("Device has no remote phone nor local node.");
238 rc = ESTALL;
239 }
240
241 usb_log_debug2("Transfer %p processed: %s.",
242 transfer, str_error(rc));
243
244 fibril_mutex_lock(&dev->guard);
245 if (rc == EOK) {
246 if (is_set_address_transfer(transfer)) {
247 usb_device_request_setup_packet_t *setup =
248 (void*) transfer->batch.setup.buffer;
249 dev->address = setup->value;
250 usb_log_debug2("Address changed to %d",
251 dev->address);
252 }
253 }
254 if (rc == ENAK) {
255 // FIXME: this will work only because we do
256 // not NAK control transfers but this is generally
257 // a VERY bad idea indeed
258 list_append(&transfer->link, &dev->transfer_queue);
259 }
260 fibril_mutex_unlock(&dev->guard);
261
262 if (rc != ENAK) {
263 execute_transfer_callback_and_free(transfer,
264 data_transfer_size, rc);
265 }
266
267 async_usleep(1000 * 100);
268 fibril_mutex_lock(&dev->guard);
269 }
270
271 /* Immediately fail all remaining transfers. */
272 while (!list_empty(&dev->transfer_queue)) {
273 vhc_transfer_t *transfer = dequeue_first_transfer(dev);
274 execute_transfer_callback_and_free(transfer, 0, EBADCHECKSUM);
275 }
276
277 fibril_mutex_unlock(&dev->guard);
278
279 return EOK;
280}
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