Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/module.h> |
2 | #include <linux/pci.h> | |
3 | #include <linux/init.h> | |
4 | #include <linux/agp_backend.h> | |
5 | #include <linux/mm.h> | |
6 | #include <linux/slab.h> | |
7 | ||
8 | #include <asm/machvec.h> | |
9 | #include <asm/agp_backend.h> | |
10 | #include "../../../arch/alpha/kernel/pci_impl.h" | |
11 | ||
12 | #include "agp.h" | |
13 | ||
6d6f8d52 NP |
14 | static int alpha_core_agp_vm_fault(struct vm_area_struct *vma, |
15 | struct vm_fault *vmf) | |
1da177e4 LT |
16 | { |
17 | alpha_agp_info *agp = agp_bridge->dev_private_data; | |
18 | dma_addr_t dma_addr; | |
19 | unsigned long pa; | |
20 | struct page *page; | |
21 | ||
6d6f8d52 NP |
22 | dma_addr = (unsigned long)vmf->virtual_address - vma->vm_start |
23 | + agp->aperture.bus_base; | |
1da177e4 LT |
24 | pa = agp->ops->translate(agp, dma_addr); |
25 | ||
6a92a4e0 | 26 | if (pa == (unsigned long)-EINVAL) |
6d6f8d52 | 27 | return VM_FAULT_SIGBUS; /* no translation */ |
6a92a4e0 | 28 | |
1da177e4 LT |
29 | /* |
30 | * Get the page, inc the use count, and return it | |
31 | */ | |
32 | page = virt_to_page(__va(pa)); | |
33 | get_page(page); | |
6d6f8d52 NP |
34 | vmf->page = page; |
35 | return 0; | |
1da177e4 LT |
36 | } |
37 | ||
38 | static struct aper_size_info_fixed alpha_core_agp_sizes[] = | |
39 | { | |
40 | { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */ | |
41 | }; | |
42 | ||
f0f37e2f | 43 | static const struct vm_operations_struct alpha_core_agp_vm_ops = { |
6d6f8d52 | 44 | .fault = alpha_core_agp_vm_fault, |
1da177e4 LT |
45 | }; |
46 | ||
47 | ||
1da177e4 LT |
48 | static int alpha_core_agp_fetch_size(void) |
49 | { | |
50 | return alpha_core_agp_sizes[0].size; | |
51 | } | |
52 | ||
53 | static int alpha_core_agp_configure(void) | |
54 | { | |
55 | alpha_agp_info *agp = agp_bridge->dev_private_data; | |
56 | agp_bridge->gart_bus_addr = agp->aperture.bus_base; | |
57 | return 0; | |
58 | } | |
59 | ||
60 | static void alpha_core_agp_cleanup(void) | |
61 | { | |
62 | alpha_agp_info *agp = agp_bridge->dev_private_data; | |
63 | ||
64 | agp->ops->cleanup(agp); | |
65 | } | |
66 | ||
67 | static void alpha_core_agp_tlbflush(struct agp_memory *mem) | |
68 | { | |
69 | alpha_agp_info *agp = agp_bridge->dev_private_data; | |
70 | alpha_mv.mv_pci_tbi(agp->hose, 0, -1); | |
71 | } | |
72 | ||
73 | static void alpha_core_agp_enable(struct agp_bridge_data *bridge, u32 mode) | |
74 | { | |
75 | alpha_agp_info *agp = bridge->dev_private_data; | |
76 | ||
77 | agp->mode.lw = agp_collect_device_status(bridge, mode, | |
78 | agp->capability.lw); | |
79 | ||
80 | agp->mode.bits.enable = 1; | |
81 | agp->ops->configure(agp); | |
82 | ||
c7258012 | 83 | agp_device_command(agp->mode.lw, false); |
1da177e4 LT |
84 | } |
85 | ||
6a92a4e0 | 86 | static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start, |
1da177e4 LT |
87 | int type) |
88 | { | |
89 | alpha_agp_info *agp = agp_bridge->dev_private_data; | |
90 | int num_entries, status; | |
91 | void *temp; | |
92 | ||
a030ce44 TH |
93 | if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES) |
94 | return -EINVAL; | |
95 | ||
1da177e4 LT |
96 | temp = agp_bridge->current_size; |
97 | num_entries = A_SIZE_FIX(temp)->num_entries; | |
6a92a4e0 DJ |
98 | if ((pg_start + mem->page_count) > num_entries) |
99 | return -EINVAL; | |
1da177e4 LT |
100 | |
101 | status = agp->ops->bind(agp, pg_start, mem); | |
102 | mb(); | |
103 | alpha_core_agp_tlbflush(mem); | |
104 | ||
105 | return status; | |
106 | } | |
107 | ||
6a92a4e0 | 108 | static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start, |
1da177e4 LT |
109 | int type) |
110 | { | |
111 | alpha_agp_info *agp = agp_bridge->dev_private_data; | |
112 | int status; | |
113 | ||
114 | status = agp->ops->unbind(agp, pg_start, mem); | |
115 | alpha_core_agp_tlbflush(mem); | |
116 | return status; | |
117 | } | |
118 | ||
81c24669 AM |
119 | static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a) |
120 | { | |
121 | return 0; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | struct agp_bridge_driver alpha_core_agp_driver = { |
125 | .owner = THIS_MODULE, | |
126 | .aperture_sizes = alpha_core_agp_sizes, | |
127 | .num_aperture_sizes = 1, | |
128 | .size_type = FIXED_APER_SIZE, | |
c7258012 | 129 | .cant_use_aperture = true, |
1da177e4 | 130 | .masks = NULL, |
6a92a4e0 | 131 | |
1da177e4 LT |
132 | .fetch_size = alpha_core_agp_fetch_size, |
133 | .configure = alpha_core_agp_configure, | |
134 | .agp_enable = alpha_core_agp_enable, | |
135 | .cleanup = alpha_core_agp_cleanup, | |
136 | .tlb_flush = alpha_core_agp_tlbflush, | |
137 | .mask_memory = agp_generic_mask_memory, | |
138 | .cache_flush = global_cache_flush, | |
81c24669 AM |
139 | .create_gatt_table = alpha_core_agp_create_free_gatt_table, |
140 | .free_gatt_table = alpha_core_agp_create_free_gatt_table, | |
1da177e4 LT |
141 | .insert_memory = alpha_core_agp_insert_memory, |
142 | .remove_memory = alpha_core_agp_remove_memory, | |
143 | .alloc_by_type = agp_generic_alloc_by_type, | |
144 | .free_by_type = agp_generic_free_by_type, | |
145 | .agp_alloc_page = agp_generic_alloc_page, | |
5f310b63 | 146 | .agp_alloc_pages = agp_generic_alloc_pages, |
1da177e4 | 147 | .agp_destroy_page = agp_generic_destroy_page, |
5f310b63 | 148 | .agp_destroy_pages = agp_generic_destroy_pages, |
a030ce44 | 149 | .agp_type_to_mask_type = agp_generic_type_to_mask_type, |
1da177e4 LT |
150 | }; |
151 | ||
152 | struct agp_bridge_data *alpha_bridge; | |
153 | ||
154 | int __init | |
155 | alpha_core_agp_setup(void) | |
156 | { | |
157 | alpha_agp_info *agp = alpha_mv.agp_info(); | |
158 | struct pci_dev *pdev; /* faked */ | |
159 | struct aper_size_info_fixed *aper_size; | |
160 | ||
161 | if (!agp) | |
162 | return -ENODEV; | |
163 | if (agp->ops->setup(agp)) | |
164 | return -ENODEV; | |
165 | ||
166 | /* | |
167 | * Build the aperture size descriptor | |
168 | */ | |
169 | aper_size = alpha_core_agp_sizes; | |
170 | aper_size->size = agp->aperture.size / (1024 * 1024); | |
171 | aper_size->num_entries = agp->aperture.size / PAGE_SIZE; | |
172 | aper_size->page_order = __ffs(aper_size->num_entries / 1024); | |
173 | ||
174 | /* | |
175 | * Build a fake pci_dev struct | |
176 | */ | |
8b1fce04 | 177 | pdev = pci_alloc_dev(NULL); |
1da177e4 LT |
178 | if (!pdev) |
179 | return -ENOMEM; | |
180 | pdev->vendor = 0xffff; | |
181 | pdev->device = 0xffff; | |
182 | pdev->sysdata = agp->hose; | |
183 | ||
184 | alpha_bridge = agp_alloc_bridge(); | |
185 | if (!alpha_bridge) | |
186 | goto fail; | |
187 | ||
188 | alpha_bridge->driver = &alpha_core_agp_driver; | |
189 | alpha_bridge->vm_ops = &alpha_core_agp_vm_ops; | |
190 | alpha_bridge->current_size = aper_size; /* only 1 size */ | |
191 | alpha_bridge->dev_private_data = agp; | |
192 | alpha_bridge->dev = pdev; | |
193 | alpha_bridge->mode = agp->capability.lw; | |
194 | ||
195 | printk(KERN_INFO PFX "Detected AGP on hose %d\n", agp->hose->index); | |
196 | return agp_add_bridge(alpha_bridge); | |
197 | ||
198 | fail: | |
199 | kfree(pdev); | |
200 | return -ENOMEM; | |
201 | } | |
202 | ||
203 | static int __init agp_alpha_core_init(void) | |
204 | { | |
205 | if (agp_off) | |
206 | return -EINVAL; | |
207 | if (alpha_mv.agp_info) | |
208 | return alpha_core_agp_setup(); | |
209 | return -ENODEV; | |
210 | } | |
211 | ||
212 | static void __exit agp_alpha_core_cleanup(void) | |
213 | { | |
214 | agp_remove_bridge(alpha_bridge); | |
215 | agp_put_bridge(alpha_bridge); | |
216 | } | |
217 | ||
218 | module_init(agp_alpha_core_init); | |
219 | module_exit(agp_alpha_core_cleanup); | |
220 | ||
221 | MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>"); | |
222 | MODULE_LICENSE("GPL and additional rights"); |