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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2003-2005 Silicon Graphics, Inc. All Rights Reserved. | |
7 | */ | |
8 | ||
9 | /* | |
10 | * SGI TIOCA AGPGART routines. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/acpi.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/pci.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/agp_backend.h> | |
19 | #include <asm/sn/addrs.h> | |
20 | #include <asm/sn/pcidev.h> | |
21 | #include <asm/sn/pcibus_provider_defs.h> | |
22 | #include <asm/sn/tioca_provider.h> | |
23 | #include "agp.h" | |
24 | ||
25 | extern int agp_memory_reserved; | |
26 | extern uint32_t tioca_gart_found; | |
27 | extern struct list_head tioca_list; | |
28 | static struct agp_bridge_data **sgi_tioca_agp_bridges; | |
29 | ||
30 | /* | |
31 | * The aperature size and related information is set up at TIOCA init time. | |
32 | * Values for this table will be extracted and filled in at | |
33 | * sgi_tioca_fetch_size() time. | |
34 | */ | |
35 | ||
36 | static struct aper_size_info_fixed sgi_tioca_sizes[] = { | |
37 | {0, 0, 0}, | |
38 | }; | |
39 | ||
40 | static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge) | |
41 | { | |
42 | struct page *page; | |
43 | int nid; | |
44 | struct tioca_kernel *info = | |
45 | (struct tioca_kernel *)bridge->dev_private_data; | |
46 | ||
47 | nid = info->ca_closest_node; | |
48 | page = alloc_pages_node(nid, GFP_KERNEL, 0); | |
49 | if (page == NULL) { | |
50 | return 0; | |
51 | } | |
52 | ||
53 | get_page(page); | |
54 | SetPageLocked(page); | |
55 | atomic_inc(&agp_bridge->current_memory_agp); | |
56 | return page_address(page); | |
57 | } | |
58 | ||
59 | /* | |
60 | * Flush GART tlb's. Cannot selectively flush based on memory so the mem | |
61 | * arg is ignored. | |
62 | */ | |
63 | ||
64 | static void sgi_tioca_tlbflush(struct agp_memory *mem) | |
65 | { | |
66 | tioca_tlbflush(mem->bridge->dev_private_data); | |
67 | } | |
68 | ||
69 | /* | |
70 | * Given an address of a host physical page, turn it into a valid gart | |
71 | * entry. | |
72 | */ | |
73 | static unsigned long | |
74 | sgi_tioca_mask_memory(struct agp_bridge_data *bridge, | |
75 | unsigned long addr, int type) | |
76 | { | |
77 | return tioca_physpage_to_gart(addr); | |
78 | } | |
79 | ||
80 | static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode) | |
81 | { | |
82 | tioca_fastwrite_enable(bridge->dev_private_data); | |
83 | } | |
84 | ||
85 | /* | |
86 | * sgi_tioca_configure() doesn't have anything to do since the base CA driver | |
87 | * has alreay set up the GART. | |
88 | */ | |
89 | ||
90 | static int sgi_tioca_configure(void) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | /* | |
96 | * Determine gfx aperature size. This has already been determined by the | |
97 | * CA driver init, so just need to set agp_bridge values accordingly. | |
98 | */ | |
99 | ||
100 | static int sgi_tioca_fetch_size(void) | |
101 | { | |
102 | struct tioca_kernel *info = | |
103 | (struct tioca_kernel *)agp_bridge->dev_private_data; | |
104 | ||
105 | sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1); | |
106 | sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries; | |
107 | ||
108 | return sgi_tioca_sizes[0].size; | |
109 | } | |
110 | ||
111 | static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge) | |
112 | { | |
113 | struct tioca_kernel *info = | |
114 | (struct tioca_kernel *)bridge->dev_private_data; | |
115 | ||
116 | bridge->gatt_table_real = (u32 *) info->ca_gfxgart; | |
117 | bridge->gatt_table = bridge->gatt_table_real; | |
118 | bridge->gatt_bus_addr = info->ca_gfxgart_base; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge) | |
124 | { | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start, | |
129 | int type) | |
130 | { | |
131 | int num_entries; | |
132 | size_t i; | |
133 | off_t j; | |
134 | void *temp; | |
135 | struct agp_bridge_data *bridge; | |
136 | ||
137 | bridge = mem->bridge; | |
138 | if (!bridge) | |
139 | return -EINVAL; | |
140 | ||
141 | temp = bridge->current_size; | |
142 | ||
143 | switch (bridge->driver->size_type) { | |
144 | case U8_APER_SIZE: | |
145 | num_entries = A_SIZE_8(temp)->num_entries; | |
146 | break; | |
147 | case U16_APER_SIZE: | |
148 | num_entries = A_SIZE_16(temp)->num_entries; | |
149 | break; | |
150 | case U32_APER_SIZE: | |
151 | num_entries = A_SIZE_32(temp)->num_entries; | |
152 | break; | |
153 | case FIXED_APER_SIZE: | |
154 | num_entries = A_SIZE_FIX(temp)->num_entries; | |
155 | break; | |
156 | case LVL2_APER_SIZE: | |
157 | return -EINVAL; | |
158 | break; | |
159 | default: | |
160 | num_entries = 0; | |
161 | break; | |
162 | } | |
163 | ||
164 | num_entries -= agp_memory_reserved / PAGE_SIZE; | |
165 | if (num_entries < 0) | |
166 | num_entries = 0; | |
167 | ||
168 | if (type != 0 || mem->type != 0) { | |
169 | return -EINVAL; | |
170 | } | |
171 | ||
172 | if ((pg_start + mem->page_count) > num_entries) | |
173 | return -EINVAL; | |
174 | ||
175 | j = pg_start; | |
176 | ||
177 | while (j < (pg_start + mem->page_count)) { | |
178 | if (*(bridge->gatt_table + j)) | |
179 | return -EBUSY; | |
180 | j++; | |
181 | } | |
182 | ||
183 | if (mem->is_flushed == FALSE) { | |
184 | bridge->driver->cache_flush(); | |
185 | mem->is_flushed = TRUE; | |
186 | } | |
187 | ||
188 | for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { | |
189 | *(bridge->gatt_table + j) = | |
190 | bridge->driver->mask_memory(bridge, mem->memory[i], | |
191 | mem->type); | |
192 | } | |
193 | ||
194 | bridge->driver->tlb_flush(mem); | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start, | |
199 | int type) | |
200 | { | |
201 | size_t i; | |
202 | struct agp_bridge_data *bridge; | |
203 | ||
204 | bridge = mem->bridge; | |
205 | if (!bridge) | |
206 | return -EINVAL; | |
207 | ||
208 | if (type != 0 || mem->type != 0) { | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
212 | for (i = pg_start; i < (mem->page_count + pg_start); i++) { | |
213 | *(bridge->gatt_table + i) = 0; | |
214 | } | |
215 | ||
216 | bridge->driver->tlb_flush(mem); | |
217 | return 0; | |
218 | } | |
219 | ||
220 | static void sgi_tioca_cache_flush(void) | |
221 | { | |
222 | } | |
223 | ||
224 | /* | |
225 | * Cleanup. Nothing to do as the CA driver owns the GART. | |
226 | */ | |
227 | ||
228 | static void sgi_tioca_cleanup(void) | |
229 | { | |
230 | } | |
231 | ||
232 | static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev) | |
233 | { | |
234 | struct agp_bridge_data *bridge; | |
235 | ||
236 | list_for_each_entry(bridge, &agp_bridges, list) { | |
237 | if (bridge->dev->bus == pdev->bus) | |
238 | break; | |
239 | } | |
240 | return bridge; | |
241 | } | |
242 | ||
243 | struct agp_bridge_driver sgi_tioca_driver = { | |
244 | .owner = THIS_MODULE, | |
245 | .size_type = U16_APER_SIZE, | |
246 | .configure = sgi_tioca_configure, | |
247 | .fetch_size = sgi_tioca_fetch_size, | |
248 | .cleanup = sgi_tioca_cleanup, | |
249 | .tlb_flush = sgi_tioca_tlbflush, | |
250 | .mask_memory = sgi_tioca_mask_memory, | |
251 | .agp_enable = sgi_tioca_agp_enable, | |
252 | .cache_flush = sgi_tioca_cache_flush, | |
253 | .create_gatt_table = sgi_tioca_create_gatt_table, | |
254 | .free_gatt_table = sgi_tioca_free_gatt_table, | |
255 | .insert_memory = sgi_tioca_insert_memory, | |
256 | .remove_memory = sgi_tioca_remove_memory, | |
257 | .alloc_by_type = agp_generic_alloc_by_type, | |
258 | .free_by_type = agp_generic_free_by_type, | |
259 | .agp_alloc_page = sgi_tioca_alloc_page, | |
260 | .agp_destroy_page = agp_generic_destroy_page, | |
261 | .cant_use_aperture = 1, | |
262 | .needs_scratch_page = 0, | |
263 | .num_aperture_sizes = 1, | |
264 | }; | |
265 | ||
266 | static int __devinit agp_sgi_init(void) | |
267 | { | |
268 | unsigned int j; | |
269 | struct tioca_kernel *info; | |
270 | struct pci_dev *pdev = NULL; | |
271 | ||
272 | if (tioca_gart_found) | |
273 | printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n"); | |
274 | else | |
275 | return 0; | |
276 | ||
277 | sgi_tioca_agp_bridges = | |
278 | (struct agp_bridge_data **)kmalloc(tioca_gart_found * | |
279 | sizeof(struct agp_bridge_data *), | |
280 | GFP_KERNEL); | |
281 | ||
282 | j = 0; | |
283 | list_for_each_entry(info, &tioca_list, ca_list) { | |
284 | struct list_head *tmp; | |
285 | list_for_each(tmp, info->ca_devices) { | |
286 | u8 cap_ptr; | |
287 | pdev = pci_dev_b(tmp); | |
288 | if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8)) | |
289 | continue; | |
290 | cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); | |
291 | if (!cap_ptr) | |
292 | continue; | |
293 | } | |
294 | sgi_tioca_agp_bridges[j] = agp_alloc_bridge(); | |
295 | printk(KERN_INFO PFX "bridge %d = 0x%p\n", j, | |
296 | sgi_tioca_agp_bridges[j]); | |
297 | if (sgi_tioca_agp_bridges[j]) { | |
298 | sgi_tioca_agp_bridges[j]->dev = pdev; | |
299 | sgi_tioca_agp_bridges[j]->dev_private_data = info; | |
300 | sgi_tioca_agp_bridges[j]->driver = &sgi_tioca_driver; | |
301 | sgi_tioca_agp_bridges[j]->gart_bus_addr = | |
302 | info->ca_gfxap_base; | |
303 | sgi_tioca_agp_bridges[j]->mode = (0x7D << 24) | /* 126 requests */ | |
304 | (0x1 << 9) | /* SBA supported */ | |
305 | (0x1 << 5) | /* 64-bit addresses supported */ | |
306 | (0x1 << 4) | /* FW supported */ | |
307 | (0x1 << 3) | /* AGP 3.0 mode */ | |
308 | 0x2; /* 8x transfer only */ | |
309 | sgi_tioca_agp_bridges[j]->current_size = | |
310 | sgi_tioca_agp_bridges[j]->previous_size = | |
311 | (void *)&sgi_tioca_sizes[0]; | |
312 | agp_add_bridge(sgi_tioca_agp_bridges[j]); | |
313 | } | |
314 | j++; | |
315 | } | |
316 | ||
317 | agp_find_bridge = &sgi_tioca_find_bridge; | |
318 | return 0; | |
319 | } | |
320 | ||
321 | static void __devexit agp_sgi_cleanup(void) | |
322 | { | |
323 | if(sgi_tioca_agp_bridges) | |
324 | kfree(sgi_tioca_agp_bridges); | |
325 | sgi_tioca_agp_bridges=NULL; | |
326 | } | |
327 | ||
328 | module_init(agp_sgi_init); | |
329 | module_exit(agp_sgi_cleanup); | |
330 | ||
331 | MODULE_LICENSE("GPL and additional rights"); |