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
14static int alpha_core_agp_vm_fault(struct vm_area_struct *vma,
15 struct vm_fault *vmf)
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
22 dma_addr = (unsigned long)vmf->virtual_address - vma->vm_start
23 + agp->aperture.bus_base;
24 pa = agp->ops->translate(agp, dma_addr);
25
26 if (pa == (unsigned long)-EINVAL)
27 return VM_FAULT_SIGBUS;
28
29
30
31
32 page = virt_to_page(__va(pa));
33 get_page(page);
34 vmf->page = page;
35 return 0;
36}
37
38static struct aper_size_info_fixed alpha_core_agp_sizes[] =
39{
40 { 0, 0, 0 },
41};
42
43static const struct vm_operations_struct alpha_core_agp_vm_ops = {
44 .fault = alpha_core_agp_vm_fault,
45};
46
47
48static int alpha_core_agp_fetch_size(void)
49{
50 return alpha_core_agp_sizes[0].size;
51}
52
53static 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
60static 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
67static 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
73static 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
83 agp_device_command(agp->mode.lw, false);
84}
85
86static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start,
87 int type)
88{
89 alpha_agp_info *agp = agp_bridge->dev_private_data;
90 int num_entries, status;
91 void *temp;
92
93 if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
94 return -EINVAL;
95
96 temp = agp_bridge->current_size;
97 num_entries = A_SIZE_FIX(temp)->num_entries;
98 if ((pg_start + mem->page_count) > num_entries)
99 return -EINVAL;
100
101 status = agp->ops->bind(agp, pg_start, mem);
102 mb();
103 alpha_core_agp_tlbflush(mem);
104
105 return status;
106}
107
108static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start,
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
119static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a)
120{
121 return 0;
122}
123
124struct 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,
129 .cant_use_aperture = true,
130 .masks = NULL,
131
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,
139 .create_gatt_table = alpha_core_agp_create_free_gatt_table,
140 .free_gatt_table = alpha_core_agp_create_free_gatt_table,
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,
146 .agp_alloc_pages = agp_generic_alloc_pages,
147 .agp_destroy_page = agp_generic_destroy_page,
148 .agp_destroy_pages = agp_generic_destroy_pages,
149 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
150};
151
152struct agp_bridge_data *alpha_bridge;
153
154int __init
155alpha_core_agp_setup(void)
156{
157 alpha_agp_info *agp = alpha_mv.agp_info();
158 struct pci_dev *pdev;
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
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
176
177 pdev = pci_alloc_dev(NULL);
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;
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
203static 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
212static void __exit agp_alpha_core_cleanup(void)
213{
214 agp_remove_bridge(alpha_bridge);
215 agp_put_bridge(alpha_bridge);
216}
217
218module_init(agp_alpha_core_init);
219module_exit(agp_alpha_core_cleanup);
220
221MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>");
222MODULE_LICENSE("GPL and additional rights");
223
