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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> | |
1fa92957 | 20 | #include <asm/sn/io.h> |
1da177e4 LT |
21 | #include <asm/sn/pcidev.h> |
22 | #include <asm/sn/pcibus_provider_defs.h> | |
23 | #include <asm/sn/tioca_provider.h> | |
24 | #include "agp.h" | |
25 | ||
26 | extern int agp_memory_reserved; | |
27 | extern uint32_t tioca_gart_found; | |
28 | extern struct list_head tioca_list; | |
29 | static struct agp_bridge_data **sgi_tioca_agp_bridges; | |
30 | ||
31 | /* | |
32 | * The aperature size and related information is set up at TIOCA init time. | |
33 | * Values for this table will be extracted and filled in at | |
34 | * sgi_tioca_fetch_size() time. | |
35 | */ | |
36 | ||
37 | static struct aper_size_info_fixed sgi_tioca_sizes[] = { | |
38 | {0, 0, 0}, | |
39 | }; | |
40 | ||
07613ba2 | 41 | static struct page *sgi_tioca_alloc_page(struct agp_bridge_data *bridge) |
1da177e4 LT |
42 | { |
43 | struct page *page; | |
44 | int nid; | |
45 | struct tioca_kernel *info = | |
46 | (struct tioca_kernel *)bridge->dev_private_data; | |
47 | ||
48 | nid = info->ca_closest_node; | |
49 | page = alloc_pages_node(nid, GFP_KERNEL, 0); | |
b826b4d6 DJ |
50 | if (!page) |
51 | return NULL; | |
1da177e4 LT |
52 | |
53 | get_page(page); | |
1da177e4 | 54 | atomic_inc(&agp_bridge->current_memory_agp); |
07613ba2 | 55 | return page; |
1da177e4 LT |
56 | } |
57 | ||
58 | /* | |
59 | * Flush GART tlb's. Cannot selectively flush based on memory so the mem | |
60 | * arg is ignored. | |
61 | */ | |
62 | ||
63 | static void sgi_tioca_tlbflush(struct agp_memory *mem) | |
64 | { | |
65 | tioca_tlbflush(mem->bridge->dev_private_data); | |
66 | } | |
67 | ||
68 | /* | |
69 | * Given an address of a host physical page, turn it into a valid gart | |
70 | * entry. | |
71 | */ | |
72 | static unsigned long | |
2a4ceb6d DW |
73 | sgi_tioca_mask_memory(struct agp_bridge_data *bridge, dma_addr_t addr, |
74 | int type) | |
1da177e4 LT |
75 | { |
76 | return tioca_physpage_to_gart(addr); | |
77 | } | |
78 | ||
79 | static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode) | |
80 | { | |
81 | tioca_fastwrite_enable(bridge->dev_private_data); | |
82 | } | |
83 | ||
84 | /* | |
85 | * sgi_tioca_configure() doesn't have anything to do since the base CA driver | |
86 | * has alreay set up the GART. | |
87 | */ | |
88 | ||
89 | static int sgi_tioca_configure(void) | |
90 | { | |
91 | return 0; | |
92 | } | |
93 | ||
94 | /* | |
95 | * Determine gfx aperature size. This has already been determined by the | |
96 | * CA driver init, so just need to set agp_bridge values accordingly. | |
97 | */ | |
98 | ||
99 | static int sgi_tioca_fetch_size(void) | |
100 | { | |
101 | struct tioca_kernel *info = | |
102 | (struct tioca_kernel *)agp_bridge->dev_private_data; | |
103 | ||
104 | sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1); | |
105 | sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries; | |
106 | ||
107 | return sgi_tioca_sizes[0].size; | |
108 | } | |
109 | ||
110 | static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge) | |
111 | { | |
112 | struct tioca_kernel *info = | |
113 | (struct tioca_kernel *)bridge->dev_private_data; | |
114 | ||
115 | bridge->gatt_table_real = (u32 *) info->ca_gfxgart; | |
116 | bridge->gatt_table = bridge->gatt_table_real; | |
117 | bridge->gatt_bus_addr = info->ca_gfxgart_base; | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge) | |
123 | { | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start, | |
128 | int type) | |
129 | { | |
130 | int num_entries; | |
131 | size_t i; | |
132 | off_t j; | |
133 | void *temp; | |
134 | struct agp_bridge_data *bridge; | |
e29b545c | 135 | u64 *table; |
1da177e4 LT |
136 | |
137 | bridge = mem->bridge; | |
138 | if (!bridge) | |
139 | return -EINVAL; | |
140 | ||
e29b545c MW |
141 | table = (u64 *)bridge->gatt_table; |
142 | ||
1da177e4 LT |
143 | temp = bridge->current_size; |
144 | ||
145 | switch (bridge->driver->size_type) { | |
146 | case U8_APER_SIZE: | |
147 | num_entries = A_SIZE_8(temp)->num_entries; | |
148 | break; | |
149 | case U16_APER_SIZE: | |
150 | num_entries = A_SIZE_16(temp)->num_entries; | |
151 | break; | |
152 | case U32_APER_SIZE: | |
153 | num_entries = A_SIZE_32(temp)->num_entries; | |
154 | break; | |
155 | case FIXED_APER_SIZE: | |
156 | num_entries = A_SIZE_FIX(temp)->num_entries; | |
157 | break; | |
158 | case LVL2_APER_SIZE: | |
159 | return -EINVAL; | |
160 | break; | |
161 | default: | |
162 | num_entries = 0; | |
163 | break; | |
164 | } | |
165 | ||
166 | num_entries -= agp_memory_reserved / PAGE_SIZE; | |
167 | if (num_entries < 0) | |
168 | num_entries = 0; | |
169 | ||
170 | if (type != 0 || mem->type != 0) { | |
171 | return -EINVAL; | |
172 | } | |
173 | ||
174 | if ((pg_start + mem->page_count) > num_entries) | |
175 | return -EINVAL; | |
176 | ||
177 | j = pg_start; | |
178 | ||
179 | while (j < (pg_start + mem->page_count)) { | |
e29b545c | 180 | if (table[j]) |
1da177e4 LT |
181 | return -EBUSY; |
182 | j++; | |
183 | } | |
184 | ||
c7258012 | 185 | if (!mem->is_flushed) { |
1da177e4 | 186 | bridge->driver->cache_flush(); |
c7258012 | 187 | mem->is_flushed = true; |
1da177e4 LT |
188 | } |
189 | ||
190 | for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { | |
e29b545c | 191 | table[j] = |
2a4ceb6d | 192 | bridge->driver->mask_memory(bridge, |
6a12235c | 193 | page_to_phys(mem->pages[i]), |
1da177e4 LT |
194 | mem->type); |
195 | } | |
196 | ||
197 | bridge->driver->tlb_flush(mem); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start, | |
202 | int type) | |
203 | { | |
204 | size_t i; | |
205 | struct agp_bridge_data *bridge; | |
e29b545c | 206 | u64 *table; |
1da177e4 LT |
207 | |
208 | bridge = mem->bridge; | |
209 | if (!bridge) | |
210 | return -EINVAL; | |
211 | ||
212 | if (type != 0 || mem->type != 0) { | |
213 | return -EINVAL; | |
214 | } | |
215 | ||
e29b545c MW |
216 | table = (u64 *)bridge->gatt_table; |
217 | ||
1da177e4 | 218 | for (i = pg_start; i < (mem->page_count + pg_start); i++) { |
e29b545c | 219 | table[i] = 0; |
1da177e4 LT |
220 | } |
221 | ||
222 | bridge->driver->tlb_flush(mem); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static void sgi_tioca_cache_flush(void) | |
227 | { | |
228 | } | |
229 | ||
230 | /* | |
231 | * Cleanup. Nothing to do as the CA driver owns the GART. | |
232 | */ | |
233 | ||
234 | static void sgi_tioca_cleanup(void) | |
235 | { | |
236 | } | |
237 | ||
238 | static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev) | |
239 | { | |
240 | struct agp_bridge_data *bridge; | |
241 | ||
242 | list_for_each_entry(bridge, &agp_bridges, list) { | |
243 | if (bridge->dev->bus == pdev->bus) | |
244 | break; | |
245 | } | |
246 | return bridge; | |
247 | } | |
248 | ||
e047d1cf | 249 | const struct agp_bridge_driver sgi_tioca_driver = { |
1da177e4 LT |
250 | .owner = THIS_MODULE, |
251 | .size_type = U16_APER_SIZE, | |
252 | .configure = sgi_tioca_configure, | |
253 | .fetch_size = sgi_tioca_fetch_size, | |
254 | .cleanup = sgi_tioca_cleanup, | |
255 | .tlb_flush = sgi_tioca_tlbflush, | |
256 | .mask_memory = sgi_tioca_mask_memory, | |
257 | .agp_enable = sgi_tioca_agp_enable, | |
258 | .cache_flush = sgi_tioca_cache_flush, | |
259 | .create_gatt_table = sgi_tioca_create_gatt_table, | |
260 | .free_gatt_table = sgi_tioca_free_gatt_table, | |
261 | .insert_memory = sgi_tioca_insert_memory, | |
262 | .remove_memory = sgi_tioca_remove_memory, | |
263 | .alloc_by_type = agp_generic_alloc_by_type, | |
264 | .free_by_type = agp_generic_free_by_type, | |
265 | .agp_alloc_page = sgi_tioca_alloc_page, | |
266 | .agp_destroy_page = agp_generic_destroy_page, | |
a030ce44 | 267 | .agp_type_to_mask_type = agp_generic_type_to_mask_type, |
c7258012 JP |
268 | .cant_use_aperture = true, |
269 | .needs_scratch_page = false, | |
1da177e4 LT |
270 | .num_aperture_sizes = 1, |
271 | }; | |
272 | ||
273 | static int __devinit agp_sgi_init(void) | |
274 | { | |
275 | unsigned int j; | |
276 | struct tioca_kernel *info; | |
277 | struct pci_dev *pdev = NULL; | |
278 | ||
279 | if (tioca_gart_found) | |
280 | printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n"); | |
281 | else | |
282 | return 0; | |
283 | ||
7b37b064 | 284 | sgi_tioca_agp_bridges = kmalloc(tioca_gart_found * |
285 | sizeof(struct agp_bridge_data *), | |
286 | GFP_KERNEL); | |
287 | if (!sgi_tioca_agp_bridges) | |
288 | return -ENOMEM; | |
1da177e4 LT |
289 | |
290 | j = 0; | |
291 | list_for_each_entry(info, &tioca_list, ca_list) { | |
292 | struct list_head *tmp; | |
146a2099 DJ |
293 | if (list_empty(info->ca_devices)) |
294 | continue; | |
1da177e4 LT |
295 | list_for_each(tmp, info->ca_devices) { |
296 | u8 cap_ptr; | |
297 | pdev = pci_dev_b(tmp); | |
298 | if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8)) | |
299 | continue; | |
300 | cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); | |
301 | if (!cap_ptr) | |
302 | continue; | |
303 | } | |
304 | sgi_tioca_agp_bridges[j] = agp_alloc_bridge(); | |
305 | printk(KERN_INFO PFX "bridge %d = 0x%p\n", j, | |
306 | sgi_tioca_agp_bridges[j]); | |
307 | if (sgi_tioca_agp_bridges[j]) { | |
308 | sgi_tioca_agp_bridges[j]->dev = pdev; | |
309 | sgi_tioca_agp_bridges[j]->dev_private_data = info; | |
310 | sgi_tioca_agp_bridges[j]->driver = &sgi_tioca_driver; | |
311 | sgi_tioca_agp_bridges[j]->gart_bus_addr = | |
312 | info->ca_gfxap_base; | |
313 | sgi_tioca_agp_bridges[j]->mode = (0x7D << 24) | /* 126 requests */ | |
314 | (0x1 << 9) | /* SBA supported */ | |
315 | (0x1 << 5) | /* 64-bit addresses supported */ | |
316 | (0x1 << 4) | /* FW supported */ | |
317 | (0x1 << 3) | /* AGP 3.0 mode */ | |
318 | 0x2; /* 8x transfer only */ | |
319 | sgi_tioca_agp_bridges[j]->current_size = | |
320 | sgi_tioca_agp_bridges[j]->previous_size = | |
321 | (void *)&sgi_tioca_sizes[0]; | |
322 | agp_add_bridge(sgi_tioca_agp_bridges[j]); | |
323 | } | |
324 | j++; | |
325 | } | |
326 | ||
327 | agp_find_bridge = &sgi_tioca_find_bridge; | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static void __devexit agp_sgi_cleanup(void) | |
332 | { | |
8f760780 JJ |
333 | kfree(sgi_tioca_agp_bridges); |
334 | sgi_tioca_agp_bridges = NULL; | |
1da177e4 LT |
335 | } |
336 | ||
337 | module_init(agp_sgi_init); | |
338 | module_exit(agp_sgi_cleanup); | |
339 | ||
340 | MODULE_LICENSE("GPL and additional rights"); |