1/**************************************************************************
2 *
3 * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including

--- 22 unchanged lines hidden (view full) ---

31 * Copyright (c) 2013 The FreeBSD Foundation
32 * All rights reserved.
33 *
34 * Portions of this software were developed by Konstantin Belousov
35 * <kib@FreeBSD.org> under sponsorship from the FreeBSD Foundation.
36 */
37
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD: stable/10/sys/dev/drm2/ttm/ttm_lock.c 259742 2013-12-22 21:18:21Z dumbbell $");
40
41#include <dev/drm2/ttm/ttm_lock.h>
42#include <dev/drm2/ttm/ttm_module.h>
43
44#define TTM_WRITE_LOCK_PENDING (1 << 0)
45#define TTM_VT_LOCK_PENDING (1 << 1)
46#define TTM_SUSPEND_LOCK_PENDING (1 << 2)
47#define TTM_VT_LOCK (1 << 3)

--- 54 unchanged lines hidden (view full) ---

102 wmsg = "ttmri";
103 } else {
104 flags = 0;
105 wmsg = "ttmr";
106 }
107 mtx_lock(&lock->lock);
108 while (!__ttm_read_lock(lock)) {
109 ret = msleep(lock, &lock->lock, flags, wmsg, 0);
110 if (ret == EINTR)
111 ret = ERESTARTSYS;
112 if (ret != 0)
113 break;
114 }
115 return (-ret);
116}
117
118static bool __ttm_read_trylock(struct ttm_lock *lock, bool *locked)
119{

--- 28 unchanged lines hidden (view full) ---

148 wmsg = "ttmrti";
149 } else {
150 flags = 0;
151 wmsg = "ttmrt";
152 }
153 mtx_lock(&lock->lock);
154 while (!__ttm_read_trylock(lock, &locked)) {
155 ret = msleep(lock, &lock->lock, flags, wmsg, 0);
156 if (ret == EINTR)
157 ret = ERESTARTSYS;
158 if (ret != 0)
159 break;
160 }
161 MPASS(!locked || ret == 0);
162 mtx_unlock(&lock->lock);
163
164 return (locked) ? 0 : -EBUSY;
165}

--- 37 unchanged lines hidden (view full) ---

203 } else {
204 flags = 0;
205 wmsg = "ttmw";
206 }
207 mtx_lock(&lock->lock);
208 /* XXXKIB: linux uses __ttm_read_lock for uninterruptible sleeps */
209 while (!__ttm_write_lock(lock)) {
210 ret = msleep(lock, &lock->lock, flags, wmsg, 0);
211 if (ret == EINTR)
212 ret = ERESTARTSYS;
213 if (interruptible && ret != 0) {
214 lock->flags &= ~TTM_WRITE_LOCK_PENDING;
215 wakeup(lock);
216 break;
217 }
218 }
219 mtx_unlock(&lock->lock);
220

--- 60 unchanged lines hidden (view full) ---

281 wmsg = "ttmwi";
282 } else {
283 flags = 0;
284 wmsg = "ttmw";
285 }
286 mtx_lock(&lock->lock);
287 while (!__ttm_vt_lock(lock)) {
288 ret = msleep(lock, &lock->lock, flags, wmsg, 0);
289 if (ret == EINTR)
290 ret = ERESTARTSYS;
291 if (interruptible && ret != 0) {
292 lock->flags &= ~TTM_VT_LOCK_PENDING;
293 wakeup(lock);
294 break;
295 }
296 }
297
298 /*

--- 50 unchanged lines hidden ---