forked from KolibriOS/kolibrios
153 lines
3.8 KiB
C
153 lines
3.8 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (c) 2006-2007 Tungsten Graphics, Inc., Cedar Park, TX., USA
|
|
* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS 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.
|
|
*
|
|
**************************************************************************/
|
|
/*
|
|
* Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <drm/drmP.h>
|
|
|
|
extern int x86_clflush_size;
|
|
|
|
static inline void clflush(volatile void *__p)
|
|
{
|
|
asm volatile("clflush %0" : "+m" (*(volatile char*)__p));
|
|
}
|
|
#if 0
|
|
static void
|
|
drm_clflush_page(struct page *page)
|
|
{
|
|
uint8_t *page_virtual;
|
|
unsigned int i;
|
|
const int size = boot_cpu_data.x86_clflush_size;
|
|
|
|
if (unlikely(page == NULL))
|
|
return;
|
|
|
|
page_virtual = kmap_atomic(page);
|
|
for (i = 0; i < PAGE_SIZE; i += size)
|
|
clflush(page_virtual + i);
|
|
kunmap_atomic(page_virtual);
|
|
}
|
|
|
|
static void drm_cache_flush_clflush(struct page *pages[],
|
|
unsigned long num_pages)
|
|
{
|
|
unsigned long i;
|
|
|
|
mb();
|
|
for (i = 0; i < num_pages; i++)
|
|
drm_clflush_page(*pages++);
|
|
mb();
|
|
}
|
|
|
|
static void
|
|
drm_clflush_ipi_handler(void *null)
|
|
{
|
|
wbinvd();
|
|
}
|
|
#endif
|
|
|
|
void
|
|
drm_clflush_pages(struct page *pages[], unsigned long num_pages)
|
|
{
|
|
uint8_t *page_virtual;
|
|
unsigned int i, j;
|
|
|
|
page_virtual = AllocKernelSpace(4096);
|
|
|
|
if(page_virtual != NULL)
|
|
{
|
|
dma_addr_t *src, *dst;
|
|
u32 count;
|
|
|
|
for (i = 0; i < num_pages; i++)
|
|
{
|
|
mb();
|
|
// asm volatile("mfence");
|
|
|
|
MapPage(page_virtual,*pages++, 0x001);
|
|
for (j = 0; j < PAGE_SIZE; j += x86_clflush_size)
|
|
clflush(page_virtual + j);
|
|
mb();
|
|
}
|
|
FreeKernelSpace(page_virtual);
|
|
}
|
|
|
|
}
|
|
EXPORT_SYMBOL(drm_clflush_pages);
|
|
|
|
#if 0
|
|
void
|
|
drm_clflush_sg(struct sg_table *st)
|
|
{
|
|
#if defined(CONFIG_X86)
|
|
if (cpu_has_clflush) {
|
|
struct sg_page_iter sg_iter;
|
|
|
|
mb();
|
|
for_each_sg_page(st->sgl, &sg_iter, st->nents, 0)
|
|
drm_clflush_page(sg_page_iter_page(&sg_iter));
|
|
mb();
|
|
|
|
return;
|
|
}
|
|
|
|
if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
|
|
printk(KERN_ERR "Timed out waiting for cache flush.\n");
|
|
#else
|
|
printk(KERN_ERR "Architecture has no drm_cache.c support\n");
|
|
WARN_ON_ONCE(1);
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(drm_clflush_sg);
|
|
|
|
void
|
|
drm_clflush_virt_range(char *addr, unsigned long length)
|
|
{
|
|
#if defined(CONFIG_X86)
|
|
if (cpu_has_clflush) {
|
|
char *end = addr + length;
|
|
mb();
|
|
for (; addr < end; addr += boot_cpu_data.x86_clflush_size)
|
|
clflush(addr);
|
|
clflush(end - 1);
|
|
mb();
|
|
return;
|
|
}
|
|
|
|
if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
|
|
printk(KERN_ERR "Timed out waiting for cache flush.\n");
|
|
#else
|
|
printk(KERN_ERR "Architecture has no drm_cache.c support\n");
|
|
WARN_ON_ONCE(1);
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(drm_clflush_virt_range);
|
|
|
|
#endif
|