source: mainline/uspace/drv/uhci-hcd/transfer_list.c@ 1a93bb0

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 1a93bb0 was 36a4738, checked in by Jan Vesely <jano.vesely@…>, 14 years ago

Add interrupt registration and debug
  • Property mode set to 100644
File size: 5.0 KB
Line 
1/*
2 * Copyright (c) 2011 Jan Vesely
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/** @addtogroup usb
29 * @{
30 */
31/** @file
32 * @brief UHCI driver
33 */
34#include <errno.h>
35
36#include <usb/debug.h>
37
38#include "transfer_list.h"
39
40int transfer_list_init(transfer_list_t *instance, const char *name)
41{
42 assert(instance);
43 instance->next = NULL;
44 instance->name = name;
45 instance->queue_head = queue_head_get();
46 if (!instance->queue_head) {
47 usb_log_error("Failed to allocate queue head.\n");
48 return ENOMEM;
49 }
50 instance->queue_head_pa = (uintptr_t)addr_to_phys(instance->queue_head);
51
52 queue_head_init(instance->queue_head);
53 list_initialize(&instance->batch_list);
54 fibril_mutex_initialize(&instance->guard);
55 return EOK;
56}
57/*----------------------------------------------------------------------------*/
58void transfer_list_set_next(transfer_list_t *instance, transfer_list_t *next)
59{
60 assert(instance);
61 assert(next);
62 if (!instance->queue_head)
63 return;
64 queue_head_append_qh(instance->queue_head, next->queue_head_pa);
65 instance->queue_head->element = instance->queue_head->next_queue;
66}
67/*----------------------------------------------------------------------------*/
68void transfer_list_add_batch(transfer_list_t *instance, batch_t *batch)
69{
70 assert(instance);
71 assert(batch);
72
73 uint32_t pa = (uintptr_t)addr_to_phys(batch->qh);
74 assert((pa & LINK_POINTER_ADDRESS_MASK) == pa);
75 pa |= LINK_POINTER_QUEUE_HEAD_FLAG;
76
77 batch->qh->next_queue = instance->queue_head->next_queue;
78
79 fibril_mutex_lock(&instance->guard);
80
81 if (instance->queue_head->element == instance->queue_head->next_queue) {
82 /* there is nothing scheduled */
83 list_append(&batch->link, &instance->batch_list);
84 instance->queue_head->element = pa;
85 usb_log_debug2("Added batch(%p) to queue %s first.\n",
86 batch, instance->name);
87 fibril_mutex_unlock(&instance->guard);
88 return;
89 }
90 /* now we can be sure that there is someting scheduled */
91 assert(!list_empty(&instance->batch_list));
92 batch_t *first = list_get_instance(
93 instance->batch_list.next, batch_t, link);
94 batch_t *last = list_get_instance(
95 instance->batch_list.prev, batch_t, link);
96 queue_head_append_qh(last->qh, pa);
97 list_append(&batch->link, &instance->batch_list);
98 usb_log_debug2("Added batch(%p) to queue %s last, first is %p.\n",
99 batch, instance->name, first );
100 fibril_mutex_unlock(&instance->guard);
101}
102/*----------------------------------------------------------------------------*/
103static void transfer_list_remove_batch(
104 transfer_list_t *instance, batch_t *batch)
105{
106 assert(instance);
107 assert(batch);
108 assert(instance->queue_head);
109 assert(batch->qh);
110
111 /* I'm the first one here */
112 if (batch->link.prev == &instance->batch_list) {
113 usb_log_debug("Removing batch %p was first, next element %x.\n",
114 batch, batch->qh->next_queue);
115 instance->queue_head->element = batch->qh->next_queue;
116 } else {
117 usb_log_debug("Removing batch %p was NOT first, next element %x.\n",
118 batch, batch->qh->next_queue);
119 batch_t *prev = list_get_instance(batch->link.prev, batch_t, link);
120 prev->qh->next_queue = batch->qh->next_queue;
121 }
122 list_remove(&batch->link);
123}
124/*----------------------------------------------------------------------------*/
125void transfer_list_check(transfer_list_t *instance)
126{
127 assert(instance);
128 fibril_mutex_lock(&instance->guard);
129 link_t *current = instance->batch_list.next;
130 while (current != &instance->batch_list) {
131 link_t *next = current->next;
132 batch_t *batch = list_get_instance(current, batch_t, link);
133
134 if (batch_is_complete(batch)) {
135 transfer_list_remove_batch(instance, batch);
136 batch->next_step(batch);
137 }
138 current = next;
139 }
140 fibril_mutex_unlock(&instance->guard);
141}
142/**
143 * @}
144 */
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