1 /**
2 * \file ati_pcigart.c
3 * ATI PCI GART support
4 *
5 * \author Gareth Hughes <[email protected]>
6 */
7
8 /*
9 * Created: Wed Dec 13 21:52:19 2000 by [email protected]
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 <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
36
37 #include <dev/drm2/drmP.h>
38
39 # define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
40
drm_ati_alloc_pcigart_table(struct drm_device * dev,struct drm_ati_pcigart_info * gart_info)41 static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
42 struct drm_ati_pcigart_info *gart_info)
43 {
44 gart_info->table_handle = drm_pci_alloc(dev, gart_info->table_size,
45 PAGE_SIZE, BUS_SPACE_MAXADDR);
46 if (gart_info->table_handle == NULL)
47 return -ENOMEM;
48
49 return 0;
50 }
51
drm_ati_free_pcigart_table(struct drm_device * dev,struct drm_ati_pcigart_info * gart_info)52 static void drm_ati_free_pcigart_table(struct drm_device *dev,
53 struct drm_ati_pcigart_info *gart_info)
54 {
55 drm_pci_free(dev, gart_info->table_handle);
56 gart_info->table_handle = NULL;
57 }
58
drm_ati_pcigart_cleanup(struct drm_device * dev,struct drm_ati_pcigart_info * gart_info)59 int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
60 {
61 struct drm_sg_mem *entry = dev->sg;
62 #ifdef __linux__
63 unsigned long pages;
64 int i;
65 int max_pages;
66 #endif
67
68 /* we need to support large memory configurations */
69 if (!entry) {
70 DRM_ERROR("no scatter/gather memory!\n");
71 return 0;
72 }
73
74 if (gart_info->bus_addr) {
75 #ifdef __linux__
76
77 max_pages = (gart_info->table_size / sizeof(u32));
78 pages = (entry->pages <= max_pages)
79 ? entry->pages : max_pages;
80
81 for (i = 0; i < pages; i++) {
82 if (!entry->busaddr[i])
83 break;
84 pci_unmap_page(dev->pdev, entry->busaddr[i],
85 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
86 }
87 #endif
88
89 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
90 gart_info->bus_addr = 0;
91 }
92
93 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN &&
94 gart_info->table_handle) {
95 drm_ati_free_pcigart_table(dev, gart_info);
96 }
97
98 return 1;
99 }
100 EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
101
drm_ati_pcigart_init(struct drm_device * dev,struct drm_ati_pcigart_info * gart_info)102 int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
103 {
104 struct drm_local_map *map = &gart_info->mapping;
105 struct drm_sg_mem *entry = dev->sg;
106 void *address = NULL;
107 unsigned long pages;
108 u32 *pci_gart = NULL, page_base, gart_idx;
109 dma_addr_t bus_address = 0;
110 int i, j, ret = 0;
111 int max_ati_pages, max_real_pages;
112
113 if (!entry) {
114 DRM_ERROR("no scatter/gather memory!\n");
115 goto done;
116 }
117
118 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
119 DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
120
121 #ifdef __linux__
122 if (pci_set_dma_mask(dev->pdev, gart_info->table_mask)) {
123 DRM_ERROR("fail to set dma mask to 0x%Lx\n",
124 (unsigned long long)gart_info->table_mask);
125 ret = 1;
126 goto done;
127 }
128 #endif
129
130 ret = drm_ati_alloc_pcigart_table(dev, gart_info);
131 if (ret) {
132 DRM_ERROR("cannot allocate PCI GART page!\n");
133 goto done;
134 }
135
136 pci_gart = gart_info->table_handle->vaddr;
137 address = gart_info->table_handle->vaddr;
138 bus_address = gart_info->table_handle->busaddr;
139 } else {
140 address = gart_info->addr;
141 bus_address = gart_info->bus_addr;
142 DRM_DEBUG("PCI: Gart Table: VRAM %08LX mapped at %08lX\n",
143 (unsigned long long)bus_address,
144 (unsigned long)address);
145 }
146
147
148 max_ati_pages = (gart_info->table_size / sizeof(u32));
149 max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
150 pages = (entry->pages <= max_real_pages)
151 ? entry->pages : max_real_pages;
152
153 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
154 memset(pci_gart, 0, max_ati_pages * sizeof(u32));
155 } else {
156 memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32));
157 }
158
159 gart_idx = 0;
160 for (i = 0; i < pages; i++) {
161 #ifdef __linux__
162 /* we need to support large memory configurations */
163 entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
164 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
165 if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) {
166 DRM_ERROR("unable to map PCIGART pages!\n");
167 drm_ati_pcigart_cleanup(dev, gart_info);
168 address = NULL;
169 bus_address = 0;
170 goto done;
171 }
172 #endif
173 page_base = (u32) entry->busaddr[i];
174
175 for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
176 u32 val;
177
178 switch(gart_info->gart_reg_if) {
179 case DRM_ATI_GART_IGP:
180 val = page_base | 0xc;
181 break;
182 case DRM_ATI_GART_PCIE:
183 val = (page_base >> 8) | 0xc;
184 break;
185 default:
186 case DRM_ATI_GART_PCI:
187 val = page_base;
188 break;
189 }
190 if (gart_info->gart_table_location ==
191 DRM_ATI_GART_MAIN)
192 pci_gart[gart_idx] = cpu_to_le32(val);
193 else
194 DRM_WRITE32(map, gart_idx * sizeof(u32), val);
195 gart_idx++;
196 page_base += ATI_PCIGART_PAGE_SIZE;
197 }
198 }
199 ret = 1;
200
201 #if defined(__i386__) || defined(__x86_64__)
202 wbinvd();
203 #else
204 mb();
205 #endif
206
207 done:
208 gart_info->addr = address;
209 gart_info->bus_addr = bus_address;
210 return ret;
211 }
212 EXPORT_SYMBOL(drm_ati_pcigart_init);
213