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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/gpu/drm/drm_cache.c
1 /**************************************************************************
3 * Copyright (c) 2006-2007 Tungsten Graphics, Inc., Cedar Park, TX., USA
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
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
33 #if defined(CONFIG_X86)
35 drm_clflush_page(struct page
*page
)
37 uint8_t *page_virtual
;
40 if (unlikely(page
== NULL
))
43 page_virtual
= kmap_atomic(page
, KM_USER0
);
44 for (i
= 0; i
< PAGE_SIZE
; i
+= boot_cpu_data
.x86_clflush_size
)
45 clflush(page_virtual
+ i
);
46 kunmap_atomic(page_virtual
, KM_USER0
);
49 static void drm_cache_flush_clflush(struct page
*pages
[],
50 unsigned long num_pages
)
55 for (i
= 0; i
< num_pages
; i
++)
56 drm_clflush_page(*pages
++);
61 drm_clflush_ipi_handler(void *null
)
68 drm_clflush_pages(struct page
*pages
[], unsigned long num_pages
)
71 #if defined(CONFIG_X86)
72 if (cpu_has_clflush
) {
73 drm_cache_flush_clflush(pages
, num_pages
);
77 if (on_each_cpu(drm_clflush_ipi_handler
, NULL
, 1) != 0)
78 printk(KERN_ERR
"Timed out waiting for cache flush.\n");
80 #elif defined(__powerpc__)
82 for (i
= 0; i
< num_pages
; i
++) {
83 struct page
*page
= pages
[i
];
86 if (unlikely(page
== NULL
))
89 page_virtual
= kmap_atomic(page
, KM_USER0
);
90 flush_dcache_range((unsigned long)page_virtual
,
91 (unsigned long)page_virtual
+ PAGE_SIZE
);
92 kunmap_atomic(page_virtual
, KM_USER0
);
95 printk(KERN_ERR
"Architecture has no drm_cache.c support\n");
99 EXPORT_SYMBOL(drm_clflush_pages
);