5 * \author Gareth Hughes <gareth@valinux.com>
9 * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
31 * DEALINGS IN THE SOFTWARE.
36 #if PAGE_SIZE == 65536
37 # define ATI_PCIGART_TABLE_ORDER 0
38 # define ATI_PCIGART_TABLE_PAGES (1 << 0)
39 #elif PAGE_SIZE == 16384
40 # define ATI_PCIGART_TABLE_ORDER 1
41 # define ATI_PCIGART_TABLE_PAGES (1 << 1)
42 #elif PAGE_SIZE == 8192
43 # define ATI_PCIGART_TABLE_ORDER 2
44 # define ATI_PCIGART_TABLE_PAGES (1 << 2)
45 #elif PAGE_SIZE == 4096
46 # define ATI_PCIGART_TABLE_ORDER 3
47 # define ATI_PCIGART_TABLE_PAGES (1 << 3)
49 # error - PAGE_SIZE not 64K, 16K, 8K or 4K
52 # define ATI_MAX_PCIGART_PAGES 8192 /**< 32 MB aperture, 4K pages */
53 # define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
55 static void *drm_ati_alloc_pcigart_table(void)
57 unsigned long address
;
60 DRM_DEBUG("%s\n", __FUNCTION__
);
62 address
= __get_free_pages(GFP_KERNEL
, ATI_PCIGART_TABLE_ORDER
);
67 page
= virt_to_page(address
);
69 for (i
= 0; i
< ATI_PCIGART_TABLE_PAGES
; i
++, page
++) {
71 SetPageReserved(page
);
74 DRM_DEBUG("%s: returning 0x%08lx\n", __FUNCTION__
, address
);
75 return (void *)address
;
78 static void drm_ati_free_pcigart_table(void *address
)
82 DRM_DEBUG("%s\n", __FUNCTION__
);
84 page
= virt_to_page((unsigned long)address
);
86 for (i
= 0; i
< ATI_PCIGART_TABLE_PAGES
; i
++, page
++) {
88 ClearPageReserved(page
);
91 free_pages((unsigned long)address
, ATI_PCIGART_TABLE_ORDER
);
94 int drm_ati_pcigart_cleanup(drm_device_t
*dev
, drm_ati_pcigart_info
*gart_info
)
96 drm_sg_mem_t
*entry
= dev
->sg
;
100 /* we need to support large memory configurations */
102 DRM_ERROR("no scatter/gather memory!\n");
106 if (gart_info
->bus_addr
) {
107 if (gart_info
->gart_table_location
== DRM_ATI_GART_MAIN
) {
108 pci_unmap_single(dev
->pdev
, gart_info
->bus_addr
,
109 ATI_PCIGART_TABLE_PAGES
* PAGE_SIZE
,
113 pages
= (entry
->pages
<= ATI_MAX_PCIGART_PAGES
)
114 ? entry
->pages
: ATI_MAX_PCIGART_PAGES
;
116 for (i
= 0; i
< pages
; i
++) {
117 if (!entry
->busaddr
[i
])
119 pci_unmap_single(dev
->pdev
, entry
->busaddr
[i
],
120 PAGE_SIZE
, PCI_DMA_TODEVICE
);
123 if (gart_info
->gart_table_location
== DRM_ATI_GART_MAIN
)
124 gart_info
->bus_addr
= 0;
127 if (gart_info
->gart_table_location
== DRM_ATI_GART_MAIN
128 && gart_info
->addr
) {
129 drm_ati_free_pcigart_table(gart_info
->addr
);
136 EXPORT_SYMBOL(drm_ati_pcigart_cleanup
);
138 int drm_ati_pcigart_init(drm_device_t
*dev
, drm_ati_pcigart_info
*gart_info
)
140 drm_sg_mem_t
*entry
= dev
->sg
;
141 void *address
= NULL
;
143 u32
*pci_gart
, page_base
, bus_address
= 0;
147 DRM_ERROR("no scatter/gather memory!\n");
151 if (gart_info
->gart_table_location
== DRM_ATI_GART_MAIN
) {
152 DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
154 address
= drm_ati_alloc_pcigart_table();
156 DRM_ERROR("cannot allocate PCI GART page!\n");
161 DRM_ERROR("PCI device unknown!\n");
165 bus_address
= pci_map_single(dev
->pdev
, address
,
166 ATI_PCIGART_TABLE_PAGES
*
167 PAGE_SIZE
, PCI_DMA_TODEVICE
);
168 if (bus_address
== 0) {
169 DRM_ERROR("unable to map PCIGART pages!\n");
170 drm_ati_free_pcigart_table(address
);
175 address
= gart_info
->addr
;
176 bus_address
= gart_info
->bus_addr
;
177 DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n",
178 bus_address
, (unsigned long)address
);
181 pci_gart
= (u32
*) address
;
183 pages
= (entry
->pages
<= ATI_MAX_PCIGART_PAGES
)
184 ? entry
->pages
: ATI_MAX_PCIGART_PAGES
;
186 memset(pci_gart
, 0, ATI_MAX_PCIGART_PAGES
* sizeof(u32
));
188 for (i
= 0; i
< pages
; i
++) {
189 /* we need to support large memory configurations */
190 entry
->busaddr
[i
] = pci_map_single(dev
->pdev
,
193 PAGE_SIZE
, PCI_DMA_TODEVICE
);
194 if (entry
->busaddr
[i
] == 0) {
195 DRM_ERROR("unable to map PCIGART pages!\n");
196 drm_ati_pcigart_cleanup(dev
, gart_info
);
201 page_base
= (u32
) entry
->busaddr
[i
];
203 for (j
= 0; j
< (PAGE_SIZE
/ ATI_PCIGART_PAGE_SIZE
); j
++) {
204 if (gart_info
->is_pcie
)
205 *pci_gart
= cpu_to_le32((page_base
>> 8) | 0xc);
207 *pci_gart
= cpu_to_le32(page_base
);
209 page_base
+= ATI_PCIGART_PAGE_SIZE
;
215 #if defined(__i386__) || defined(__x86_64__)
222 gart_info
->addr
= address
;
223 gart_info
->bus_addr
= bus_address
;
227 EXPORT_SYMBOL(drm_ati_pcigart_init
);
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