Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle...
[pandora-kernel.git] / drivers / gpu / drm / ati_pcigart.c
1 /**
2  * \file ati_pcigart.c
3  * ATI PCI GART support
4  *
5  * \author Gareth Hughes <gareth@valinux.com>
6  */
7
8 /*
9  * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
10  *
11  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12  * All Rights Reserved.
13  *
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:
20  *
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
23  * Software.
24  *
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.
32  */
33
34 #include "drmP.h"
35
36 # define ATI_PCIGART_PAGE_SIZE          4096    /**< PCI GART page size */
37
38 static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
39                                        struct drm_ati_pcigart_info *gart_info)
40 {
41         gart_info->table_handle = drm_pci_alloc(dev, gart_info->table_size,
42                                                 PAGE_SIZE);
43         if (gart_info->table_handle == NULL)
44                 return -ENOMEM;
45
46         return 0;
47 }
48
49 static void drm_ati_free_pcigart_table(struct drm_device *dev,
50                                        struct drm_ati_pcigart_info *gart_info)
51 {
52         drm_pci_free(dev, gart_info->table_handle);
53         gart_info->table_handle = NULL;
54 }
55
56 int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
57 {
58         struct drm_sg_mem *entry = dev->sg;
59         unsigned long pages;
60         int i;
61         int max_pages;
62
63         /* we need to support large memory configurations */
64         if (!entry) {
65                 DRM_ERROR("no scatter/gather memory!\n");
66                 return 0;
67         }
68
69         if (gart_info->bus_addr) {
70
71                 max_pages = (gart_info->table_size / sizeof(u32));
72                 pages = (entry->pages <= max_pages)
73                   ? entry->pages : max_pages;
74
75                 for (i = 0; i < pages; i++) {
76                         if (!entry->busaddr[i])
77                                 break;
78                         pci_unmap_page(dev->pdev, entry->busaddr[i],
79                                          PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
80                 }
81
82                 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
83                         gart_info->bus_addr = 0;
84         }
85
86         if (gart_info->gart_table_location == DRM_ATI_GART_MAIN &&
87             gart_info->table_handle) {
88                 drm_ati_free_pcigart_table(dev, gart_info);
89         }
90
91         return 1;
92 }
93 EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
94
95 int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
96 {
97         struct drm_local_map *map = &gart_info->mapping;
98         struct drm_sg_mem *entry = dev->sg;
99         void *address = NULL;
100         unsigned long pages;
101         u32 *pci_gart = NULL, page_base, gart_idx;
102         dma_addr_t bus_address = 0;
103         int i, j, ret = 0;
104         int max_ati_pages, max_real_pages;
105
106         if (!entry) {
107                 DRM_ERROR("no scatter/gather memory!\n");
108                 goto done;
109         }
110
111         if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
112                 DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
113
114                 if (pci_set_dma_mask(dev->pdev, gart_info->table_mask)) {
115                         DRM_ERROR("fail to set dma mask to 0x%Lx\n",
116                                   (unsigned long long)gart_info->table_mask);
117                         ret = 1;
118                         goto done;
119                 }
120
121                 ret = drm_ati_alloc_pcigart_table(dev, gart_info);
122                 if (ret) {
123                         DRM_ERROR("cannot allocate PCI GART page!\n");
124                         goto done;
125                 }
126
127                 pci_gart = gart_info->table_handle->vaddr;
128                 address = gart_info->table_handle->vaddr;
129                 bus_address = gart_info->table_handle->busaddr;
130         } else {
131                 address = gart_info->addr;
132                 bus_address = gart_info->bus_addr;
133                 DRM_DEBUG("PCI: Gart Table: VRAM %08LX mapped at %08lX\n",
134                           (unsigned long long)bus_address,
135                           (unsigned long)address);
136         }
137
138
139         max_ati_pages = (gart_info->table_size / sizeof(u32));
140         max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
141         pages = (entry->pages <= max_real_pages)
142             ? entry->pages : max_real_pages;
143
144         if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
145                 memset(pci_gart, 0, max_ati_pages * sizeof(u32));
146         } else {
147                 memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32));
148         }
149
150         gart_idx = 0;
151         for (i = 0; i < pages; i++) {
152                 /* we need to support large memory configurations */
153                 entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
154                                                  0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
155                 if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) {
156                         DRM_ERROR("unable to map PCIGART pages!\n");
157                         drm_ati_pcigart_cleanup(dev, gart_info);
158                         address = NULL;
159                         bus_address = 0;
160                         goto done;
161                 }
162                 page_base = (u32) entry->busaddr[i];
163
164                 for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
165                         u32 val;
166
167                         switch(gart_info->gart_reg_if) {
168                         case DRM_ATI_GART_IGP:
169                                 val = page_base | 0xc;
170                                 break;
171                         case DRM_ATI_GART_PCIE:
172                                 val = (page_base >> 8) | 0xc;
173                                 break;
174                         default:
175                         case DRM_ATI_GART_PCI:
176                                 val = page_base;
177                                 break;
178                         }
179                         if (gart_info->gart_table_location ==
180                             DRM_ATI_GART_MAIN)
181                                 pci_gart[gart_idx] = cpu_to_le32(val);
182                         else
183                                 DRM_WRITE32(map, gart_idx * sizeof(u32), val);
184                         gart_idx++;
185                         page_base += ATI_PCIGART_PAGE_SIZE;
186                 }
187         }
188         ret = 1;
189
190 #if defined(__i386__) || defined(__x86_64__)
191         wbinvd();
192 #else
193         mb();
194 #endif
195
196       done:
197         gart_info->addr = address;
198         gart_info->bus_addr = bus_address;
199         return ret;
200 }
201 EXPORT_SYMBOL(drm_ati_pcigart_init);