mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
9fb0767374
- S3 Savage driver ported. - Added support for ATI_fragment_shader registers for r200. - Improved r300 support, needed for latest r300 DRI driver. - (possibly) r300 PCIE support, needs X.Org server from CVS. - Added support for PCI Matrox cards. - Software fallbacks fixed for Rage 128, which used to render badly or hang. - Some issues reported by WITNESS are fixed. - i915 module Makefile added, as the driver may now be working, but is untested. - Added scripts for copying and preprocessing DRM CVS for inclusion in the kernel. Thanks to Daniel Stone for getting me started on that.
145 lines
3.8 KiB
C
145 lines
3.8 KiB
C
/**
|
|
* \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
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/* Many of these implementations are rather fake, but good enough. */
|
|
|
|
typedef u_int32_t atomic_t;
|
|
|
|
#ifdef __FreeBSD__
|
|
#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_subtract_int(p, 1)
|
|
#define atomic_add(n, p) atomic_add_int(p, n)
|
|
#define atomic_sub(n, p) atomic_subtract_int(p, n)
|
|
#else /* __FreeBSD__ */
|
|
/* FIXME */
|
|
#define atomic_set(p, v) (*(p) = (v))
|
|
#define atomic_read(p) (*(p))
|
|
#define atomic_inc(p) (*(p) += 1)
|
|
#define atomic_dec(p) (*(p) -= 1)
|
|
#define atomic_add(n, p) (*(p) += (n))
|
|
#define atomic_sub(n, p) (*(p) -= (n))
|
|
/* FIXME */
|
|
#define atomic_add_int(p, v) *(p) += v
|
|
#define atomic_subtract_int(p, v) *(p) -= v
|
|
#define atomic_set_int(p, bits) *(p) |= (bits)
|
|
#define atomic_clear_int(p, bits) *(p) &= ~(bits)
|
|
#endif /* !__FreeBSD__ */
|
|
|
|
#if !defined(__FreeBSD_version) || (__FreeBSD_version < 500000)
|
|
#if defined(__i386__)
|
|
/* The extra atomic functions from 5.0 haven't been merged to 4.x */
|
|
static __inline int
|
|
atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src)
|
|
{
|
|
int res = exp;
|
|
|
|
__asm __volatile (
|
|
" lock ; "
|
|
" cmpxchgl %1,%2 ; "
|
|
" setz %%al ; "
|
|
" movzbl %%al,%0 ; "
|
|
"1: "
|
|
"# atomic_cmpset_int"
|
|
: "+a" (res) /* 0 (result) */
|
|
: "r" (src), /* 1 */
|
|
"m" (*(dst)) /* 2 */
|
|
: "memory");
|
|
|
|
return (res);
|
|
}
|
|
#else /* __i386__ */
|
|
static __inline int
|
|
atomic_cmpset_int(__volatile__ int *dst, int old, int new)
|
|
{
|
|
int s = splhigh();
|
|
if (*dst==old) {
|
|
*dst = new;
|
|
splx(s);
|
|
return 1;
|
|
}
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
#endif /* !__i386__ */
|
|
#endif /* !__FreeBSD_version || __FreeBSD_version < 500000 */
|
|
|
|
static __inline atomic_t
|
|
test_and_set_bit(int b, volatile void *p)
|
|
{
|
|
int s = splhigh();
|
|
unsigned int m = 1<<b;
|
|
unsigned int r = *(volatile int *)p & m;
|
|
*(volatile int *)p |= m;
|
|
splx(s);
|
|
return r;
|
|
}
|
|
|
|
static __inline void
|
|
clear_bit(int b, volatile void *p)
|
|
{
|
|
atomic_clear_int(((volatile int *)p) + (b >> 5), 1 << (b & 0x1f));
|
|
}
|
|
|
|
static __inline void
|
|
set_bit(int b, volatile void *p)
|
|
{
|
|
atomic_set_int(((volatile int *)p) + (b >> 5), 1 << (b & 0x1f));
|
|
}
|
|
|
|
static __inline int
|
|
test_bit(int b, volatile void *p)
|
|
{
|
|
return ((volatile int *)p)[b >> 5] & (1 << (b & 0x1f));
|
|
}
|
|
|
|
static __inline int
|
|
find_first_zero_bit(volatile void *p, int max)
|
|
{
|
|
int b;
|
|
volatile int *ptr = (volatile int *)p;
|
|
|
|
for (b = 0; b < max; b += 32) {
|
|
if (ptr[b >> 5] != ~0) {
|
|
for (;;) {
|
|
if ((ptr[b >> 5] & (1 << (b & 0x1f))) == 0)
|
|
return b;
|
|
b++;
|
|
}
|
|
}
|
|
}
|
|
return max;
|
|
}
|