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