diff options
Diffstat (limited to 'usr/src/uts/common/drm/drm_atomic.h')
| -rw-r--r-- | usr/src/uts/common/drm/drm_atomic.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/usr/src/uts/common/drm/drm_atomic.h b/usr/src/uts/common/drm/drm_atomic.h new file mode 100644 index 0000000..7c6b7c6 --- /dev/null +++ b/usr/src/uts/common/drm/drm_atomic.h @@ -0,0 +1,104 @@ +/* BEGIN CSTYLED */ + +/* + * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. + */ + +/* + * \file drm_atomic.h + * Atomic operations used in the DRM which may or may not be provided by the OS. + * + * \author Eric Anholt <anholt@FreeBSD.org> + */ + +/* + * Copyright 2004 Eric Anholt + * Copyright (c) 2009, 2012, Intel Corporation. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +/* Many of these implementations are rather fake, but good enough. */ + + + +#ifndef _SYS_DRM_ATOMIC_H_ +#define _SYS_DRM_ATOMIC_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include <sys/atomic.h> + +#ifdef __LINT__ +#undef inline +#define inline +#endif +typedef uint32_t atomic_t; + +#define atomic_set(p, v) (*(p) = (v)) +#define atomic_read(p) (*(p)) +#define atomic_inc(p) atomic_add_int(p, 1) +#define atomic_dec(p) atomic_dec_uint(p) +#define atomic_dec_and_test(p) \ + ((0 == atomic_dec_32_nv(p)) ? 1 : 0) +#define atomic_add(n, p) atomic_add_int(p, n) +#define atomic_add_return(n, p) (atomic_add_int(p, n), *p) +#define atomic_sub(n, p) atomic_add_int(p, -n) +#define atomic_set_int(p, bits) atomic_or_uint(p, bits) +#define atomic_clear_int(p, bits) atomic_and_uint(p, ~(bits)) +#define atomic_cmpset_int(p, c, n) \ + ((c == atomic_cas_uint(p, c, n)) ? 1 : 0) +#define atomic_clear_mask(mask, p) (*(p) &= ~mask) +#define atomic_set_mask(mask, p) (*(p) |= mask) +#define atomic_inc_not_zero(p) \ + if (atomic_read(p) != 0) \ + atomic_inc(p); + +#define set_bit(b, p) \ + atomic_set_int(((volatile uint_t *)(void *)p) + (b >> 5), \ + 1 << (b & 0x1f)) + +#define clear_bit(b, p) \ + atomic_clear_int(((volatile uint_t *)(void *)p) + (b >> 5), \ + 1 << (b & 0x1f)) + +#define test_bit(b, p) \ + (((volatile uint_t *)(void *)p)[b >> 5] & (1 << (b & 0x1f))) + +/* + * Note: this routine doesn't return old value. It return + * 0 when succeeds, or -1 when fails. + */ +#ifdef _LP64 +#define test_and_set_bit(b, p) \ + atomic_set_long_excl(((ulong_t *)(void *)p) + (b >> 6), (b & 0x3f)) +#else +#define test_and_set_bit(b, p) \ + atomic_set_long_excl(((ulong_t *)(void *)p) + (b >> 5), (b & 0x1f)) +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_DRM_ATOMIC_H_ */ |