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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / char / agp / ati-agp.c
blob55c97f623242e0a0fdb559d13fe1515aa26f7c7b
1 /*
2 * ATi AGPGART routines.
3 */
4
5 #include <linux/types.h>
6 #include <linux/module.h>
7 #include <linux/pci.h>
8 #include <linux/init.h>
9 #include <linux/string.h>
10 #include <linux/slab.h>
11 #include <linux/agp_backend.h>
12 #include <asm/agp.h>
13 #include "agp.h"
14
15 #define ATI_GART_MMBASE_ADDR 0x14
16 #define ATI_RS100_APSIZE 0xac
17 #define ATI_RS100_IG_AGPMODE 0xb0
18 #define ATI_RS300_APSIZE 0xf8
19 #define ATI_RS300_IG_AGPMODE 0xfc
20 #define ATI_GART_FEATURE_ID 0x00
21 #define ATI_GART_BASE 0x04
22 #define ATI_GART_CACHE_SZBASE 0x08
23 #define ATI_GART_CACHE_CNTRL 0x0c
24 #define ATI_GART_CACHE_ENTRY_CNTRL 0x10
25
26
27 static const struct aper_size_info_lvl2 ati_generic_sizes[7] =
28 {
29 {2048, 524288, 0x0000000c},
30 {1024, 262144, 0x0000000a},
31 {512, 131072, 0x00000008},
32 {256, 65536, 0x00000006},
33 {128, 32768, 0x00000004},
34 {64, 16384, 0x00000002},
35 {32, 8192, 0x00000000}
36 };
37
38 static struct gatt_mask ati_generic_masks[] =
39 {
40 { .mask = 1, .type = 0}
41 };
42
43
44 struct ati_page_map {
45 unsigned long *real;
46 unsigned long __iomem *remapped;
47 };
48
49 static struct _ati_generic_private {
50 volatile u8 __iomem *registers;
51 struct ati_page_map **gatt_pages;
52 int num_tables;
53 } ati_generic_private;
54
55 static int ati_create_page_map(struct ati_page_map *page_map)
56 {
57 int i, err = 0;
58
59 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
60 if (page_map->real == NULL)
61 return -ENOMEM;
62
63 set_memory_uc((unsigned long)page_map->real, 1);
64 err = map_page_into_agp(virt_to_page(page_map->real));
65 page_map->remapped = page_map->real;
66
67 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
68 writel(agp_bridge->scratch_page, page_map->remapped+i);
69 readl(page_map->remapped+i); /* PCI Posting. */
70 }
71
72 return 0;
73 }
74
75
76 static void ati_free_page_map(struct ati_page_map *page_map)
77 {
78 unmap_page_from_agp(virt_to_page(page_map->real));
79 set_memory_wb((unsigned long)page_map->real, 1);
80 free_page((unsigned long) page_map->real);
81 }
82
83
84 static void ati_free_gatt_pages(void)
85 {
86 int i;
87 struct ati_page_map **tables;
88 struct ati_page_map *entry;
89
90 tables = ati_generic_private.gatt_pages;
91 for (i = 0; i < ati_generic_private.num_tables; i++) {
92 entry = tables[i];
93 if (entry != NULL) {
94 if (entry->real != NULL)
95 ati_free_page_map(entry);
96 kfree(entry);
97 }
98 }
99 kfree(tables);
100 }
101
102
103 static int ati_create_gatt_pages(int nr_tables)
104 {
105 struct ati_page_map **tables;
106 struct ati_page_map *entry;
107 int retval = 0;
108 int i;
109
110 tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
111 if (tables == NULL)
112 return -ENOMEM;
113
114 for (i = 0; i < nr_tables; i++) {
115 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
116 tables[i] = entry;
117 if (entry == NULL) {
118 retval = -ENOMEM;
119 break;
120 }
121 retval = ati_create_page_map(entry);
122 if (retval != 0)
123 break;
124 }
125 ati_generic_private.num_tables = i;
126 ati_generic_private.gatt_pages = tables;
127
128 if (retval != 0)
129 ati_free_gatt_pages();
130
131 return retval;
132 }
133
134 static int is_r200(void)
135 {
136 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
137 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
138 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
139 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
140 return 1;
141 return 0;
142 }
143
144 static int ati_fetch_size(void)
145 {
146 int i;
147 u32 temp;
148 struct aper_size_info_lvl2 *values;
149
150 if (is_r200())
151 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
152 else
153 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
154
155 temp = (temp & 0x0000000e);
156 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
157 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
158 if (temp == values[i].size_value) {
159 agp_bridge->previous_size =
160 agp_bridge->current_size = (void *) (values + i);
161
162 agp_bridge->aperture_size_idx = i;
163 return values[i].size;
164 }
165 }
166
167 return 0;
168 }
169
170 static void ati_tlbflush(struct agp_memory * mem)
171 {
172 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
173 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */
174 }
175
176 static void ati_cleanup(void)
177 {
178 struct aper_size_info_lvl2 *previous_size;
179 u32 temp;
180
181 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
182
183 /* Write back the previous size and disable gart translation */
184 if (is_r200()) {
185 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
186 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
187 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
188 } else {
189 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
190 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
191 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
192 }
193 iounmap((volatile u8 __iomem *)ati_generic_private.registers);
194 }
195
196
197 static int ati_configure(void)
198 {
199 u32 temp;
200
201 /* Get the memory mapped registers */
202 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
203 temp = (temp & 0xfffff000);
204 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
205
206 if (!ati_generic_private.registers)
207 return -ENOMEM;
208
209 if (is_r200())
210 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
211 else
212 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
213
214 /* address to map too */
215 /*
216 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
217 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
218 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
219 */
220 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
221 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/
222
223 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
224 pci_read_config_dword(agp_bridge->dev, 4, &temp);
225 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
226
227 /* Write out the address of the gatt table */
228 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
229 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */
230
231 return 0;
232 }
233
234
235 #ifdef CONFIG_PM
236 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
237 {
238 pci_save_state(dev);
239 pci_set_power_state(dev, 3);
240
241 return 0;
242 }
243
244 static int agp_ati_resume(struct pci_dev *dev)
245 {
246 pci_set_power_state(dev, 0);
247 pci_restore_state(dev);
248
249 return ati_configure();
250 }
251 #endif
252
253 /*
254 *Since we don't need contiguous memory we just try
255 * to get the gatt table once
256 */
257
258 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
259 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
260 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
261 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
262 #undef GET_GATT
263 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
264 GET_PAGE_DIR_IDX(addr)]->remapped)
265
266 static int ati_insert_memory(struct agp_memory * mem,
267 off_t pg_start, int type)
268 {
269 int i, j, num_entries;
270 unsigned long __iomem *cur_gatt;
271 unsigned long addr;
272
273 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
274
275 if (type != 0 || mem->type != 0)
276 return -EINVAL;
277
278 if ((pg_start + mem->page_count) > num_entries)
279 return -EINVAL;
280
281 j = pg_start;
282 while (j < (pg_start + mem->page_count)) {
283 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
284 cur_gatt = GET_GATT(addr);
285 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
286 return -EBUSY;
287 j++;
288 }
289
290 if (mem->is_flushed == FALSE) {
291 /*CACHE_FLUSH(); */
292 global_cache_flush();
293 mem->is_flushed = TRUE;
294 }
295
296 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
297 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
298 cur_gatt = GET_GATT(addr);
299 writel(agp_bridge->driver->mask_memory(agp_bridge,
300 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
301 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
302 }
303 agp_bridge->driver->tlb_flush(mem);
304 return 0;
305 }
306
307 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
308 int type)
309 {
310 int i;
311 unsigned long __iomem *cur_gatt;
312 unsigned long addr;
313
314 if (type != 0 || mem->type != 0)
315 return -EINVAL;
316
317 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
318 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
319 cur_gatt = GET_GATT(addr);
320 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
321 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
322 }
323
324 agp_bridge->driver->tlb_flush(mem);
325 return 0;
326 }
327
328 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
329 {
330 struct aper_size_info_lvl2 *value;
331 struct ati_page_map page_dir;
332 unsigned long addr;
333 int retval;
334 u32 temp;
335 int i;
336 struct aper_size_info_lvl2 *current_size;
337
338 value = A_SIZE_LVL2(agp_bridge->current_size);
339 retval = ati_create_page_map(&page_dir);
340 if (retval != 0)
341 return retval;
342
343 retval = ati_create_gatt_pages(value->num_entries / 1024);
344 if (retval != 0) {
345 ati_free_page_map(&page_dir);
346 return retval;
347 }
348
349 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
350 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
351 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
352
353 /* Write out the size register */
354 current_size = A_SIZE_LVL2(agp_bridge->current_size);
355
356 if (is_r200()) {
357 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
358 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
359 | 0x00000001);
360 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
361 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
362 } else {
363 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
364 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
365 | 0x00000001);
366 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
367 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
368 }
369
370 /*
371 * Get the address for the gart region.
372 * This is a bus address even on the alpha, b/c its
373 * used to program the agp master not the cpu
374 */
375 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
376 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
377 agp_bridge->gart_bus_addr = addr;
378
379 /* Calculate the agp offset */
380 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
381 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
382 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
383 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
384 }
385
386 return 0;
387 }
388
389 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
390 {
391 struct ati_page_map page_dir;
392
393 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
394 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
395
396 ati_free_gatt_pages();
397 ati_free_page_map(&page_dir);
398 return 0;
399 }
400
401 static const struct agp_bridge_driver ati_generic_bridge = {
402 .owner = THIS_MODULE,
403 .aperture_sizes = ati_generic_sizes,
404 .size_type = LVL2_APER_SIZE,
405 .num_aperture_sizes = 7,
406 .configure = ati_configure,
407 .fetch_size = ati_fetch_size,
408 .cleanup = ati_cleanup,
409 .tlb_flush = ati_tlbflush,
410 .mask_memory = agp_generic_mask_memory,
411 .masks = ati_generic_masks,
412 .agp_enable = agp_generic_enable,
413 .cache_flush = global_cache_flush,
414 .create_gatt_table = ati_create_gatt_table,
415 .free_gatt_table = ati_free_gatt_table,
416 .insert_memory = ati_insert_memory,
417 .remove_memory = ati_remove_memory,
418 .alloc_by_type = agp_generic_alloc_by_type,
419 .free_by_type = agp_generic_free_by_type,
420 .agp_alloc_page = agp_generic_alloc_page,
421 .agp_destroy_page = agp_generic_destroy_page,
422 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
423 };
424
425
426 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
427 {
428 {
429 .device_id = PCI_DEVICE_ID_ATI_RS100,
430 .chipset_name = "IGP320/M",
431 },
432 {
433 .device_id = PCI_DEVICE_ID_ATI_RS200,
434 .chipset_name = "IGP330/340/345/350/M",
435 },
436 {
437 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
438 .chipset_name = "IGP345M",
439 },
440 {
441 .device_id = PCI_DEVICE_ID_ATI_RS250,
442 .chipset_name = "IGP7000/M",
443 },
444 {
445 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
446 .chipset_name = "IGP9100/M",
447 },
448 {
449 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
450 .chipset_name = "IGP9100/M",
451 },
452 {
453 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
454 .chipset_name = "IGP9100/M",
455 },
456 {
457 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
458 .chipset_name = "IGP9100/M",
459 },
460 {
461 .device_id = PCI_DEVICE_ID_ATI_RS350_200,
462 .chipset_name = "IGP9100/M",
463 },
464 { }, /* dummy final entry, always present */
465 };
466
467 static int __devinit agp_ati_probe(struct pci_dev *pdev,
468 const struct pci_device_id *ent)
469 {
470 struct agp_device_ids *devs = ati_agp_device_ids;
471 struct agp_bridge_data *bridge;
472 u8 cap_ptr;
473 int j;
474
475 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
476 if (!cap_ptr)
477 return -ENODEV;
478
479 /* probe for known chipsets */
480 for (j = 0; devs[j].chipset_name; j++) {
481 if (pdev->device == devs[j].device_id)
482 goto found;
483 }
484
485 printk(KERN_ERR PFX
486 "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
487 return -ENODEV;
488
489 found:
490 bridge = agp_alloc_bridge();
491 if (!bridge)
492 return -ENOMEM;
493
494 bridge->dev = pdev;
495 bridge->capndx = cap_ptr;
496
497 bridge->driver = &ati_generic_bridge;
498
499 printk(KERN_INFO PFX "Detected Ati %s chipset\n",
500 devs[j].chipset_name);
501
502 /* Fill in the mode register */
503 pci_read_config_dword(pdev,
504 bridge->capndx+PCI_AGP_STATUS,
505 &bridge->mode);
506
507 pci_set_drvdata(pdev, bridge);
508 return agp_add_bridge(bridge);
509 }
510
511 static void __devexit agp_ati_remove(struct pci_dev *pdev)
512 {
513 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
514
515 agp_remove_bridge(bridge);
516 agp_put_bridge(bridge);
517 }
518
519 static struct pci_device_id agp_ati_pci_table[] = {
520 {
521 .class = (PCI_CLASS_BRIDGE_HOST << 8),
522 .class_mask = ~0,
523 .vendor = PCI_VENDOR_ID_ATI,
524 .device = PCI_ANY_ID,
525 .subvendor = PCI_ANY_ID,
526 .subdevice = PCI_ANY_ID,
527 },
528 { }
529 };
530
531 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
532
533 static struct pci_driver agp_ati_pci_driver = {
534 .name = "agpgart-ati",
535 .id_table = agp_ati_pci_table,
536 .probe = agp_ati_probe,
537 .remove = agp_ati_remove,
538 #ifdef CONFIG_PM
539 .suspend = agp_ati_suspend,
540 .resume = agp_ati_resume,
541 #endif
542 };
543
544 static int __init agp_ati_init(void)
545 {
546 if (agp_off)
547 return -EINVAL;
548 return pci_register_driver(&agp_ati_pci_driver);
549 }
550
551 static void __exit agp_ati_cleanup(void)
552 {
553 pci_unregister_driver(&agp_ati_pci_driver);
554 }
555
556 module_init(agp_ati_init);
557 module_exit(agp_ati_cleanup);
558
559 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
560 MODULE_LICENSE("GPL and additional rights");
561
mah project overlay