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WIP FPC-III support
[linux/fpc-iii.git] / drivers / char / agp / ati-agp.c
blob20bf5f78a362073e6068a2dd0bd7ddadcb8e32dd
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 <asm/set_memory.h>
14 #include "agp.h"
15
16 #define ATI_GART_MMBASE_BAR 1
17 #define ATI_RS100_APSIZE 0xac
18 #define ATI_RS100_IG_AGPMODE 0xb0
19 #define ATI_RS300_APSIZE 0xf8
20 #define ATI_RS300_IG_AGPMODE 0xfc
21 #define ATI_GART_FEATURE_ID 0x00
22 #define ATI_GART_BASE 0x04
23 #define ATI_GART_CACHE_SZBASE 0x08
24 #define ATI_GART_CACHE_CNTRL 0x0c
25 #define ATI_GART_CACHE_ENTRY_CNTRL 0x10
26
27
28 static const struct aper_size_info_lvl2 ati_generic_sizes[7] =
29 {
30 {2048, 524288, 0x0000000c},
31 {1024, 262144, 0x0000000a},
32 {512, 131072, 0x00000008},
33 {256, 65536, 0x00000006},
34 {128, 32768, 0x00000004},
35 {64, 16384, 0x00000002},
36 {32, 8192, 0x00000000}
37 };
38
39 static struct gatt_mask ati_generic_masks[] =
40 {
41 { .mask = 1, .type = 0}
42 };
43
44
45 struct ati_page_map {
46 unsigned long *real;
47 unsigned long __iomem *remapped;
48 };
49
50 static struct _ati_generic_private {
51 volatile u8 __iomem *registers;
52 struct ati_page_map **gatt_pages;
53 int num_tables;
54 } ati_generic_private;
55
56 static int ati_create_page_map(struct ati_page_map *page_map)
57 {
58 int i, err = 0;
59
60 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
61 if (page_map->real == NULL)
62 return -ENOMEM;
63
64 set_memory_uc((unsigned long)page_map->real, 1);
65 err = map_page_into_agp(virt_to_page(page_map->real));
66 page_map->remapped = page_map->real;
67
68 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
69 writel(agp_bridge->scratch_page, page_map->remapped+i);
70 readl(page_map->remapped+i); /* PCI Posting. */
71 }
72
73 return 0;
74 }
75
76
77 static void ati_free_page_map(struct ati_page_map *page_map)
78 {
79 unmap_page_from_agp(virt_to_page(page_map->real));
80 set_memory_wb((unsigned long)page_map->real, 1);
81 free_page((unsigned long) page_map->real);
82 }
83
84
85 static void ati_free_gatt_pages(void)
86 {
87 int i;
88 struct ati_page_map **tables;
89 struct ati_page_map *entry;
90
91 tables = ati_generic_private.gatt_pages;
92 for (i = 0; i < ati_generic_private.num_tables; i++) {
93 entry = tables[i];
94 if (entry != NULL) {
95 if (entry->real != NULL)
96 ati_free_page_map(entry);
97 kfree(entry);
98 }
99 }
100 kfree(tables);
101 }
102
103
104 static int ati_create_gatt_pages(int nr_tables)
105 {
106 struct ati_page_map **tables;
107 struct ati_page_map *entry;
108 int retval = 0;
109 int i;
110
111 tables = kcalloc(nr_tables + 1, sizeof(struct ati_page_map *),
112 GFP_KERNEL);
113 if (tables == NULL)
114 return -ENOMEM;
115
116 for (i = 0; i < nr_tables; i++) {
117 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
118 tables[i] = entry;
119 if (entry == NULL) {
120 retval = -ENOMEM;
121 break;
122 }
123 retval = ati_create_page_map(entry);
124 if (retval != 0)
125 break;
126 }
127 ati_generic_private.num_tables = i;
128 ati_generic_private.gatt_pages = tables;
129
130 if (retval != 0)
131 ati_free_gatt_pages();
132
133 return retval;
134 }
135
136 static int is_r200(void)
137 {
138 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
139 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
140 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
141 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
142 return 1;
143 return 0;
144 }
145
146 static int ati_fetch_size(void)
147 {
148 int i;
149 u32 temp;
150 struct aper_size_info_lvl2 *values;
151
152 if (is_r200())
153 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
154 else
155 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
156
157 temp = (temp & 0x0000000e);
158 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
159 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
160 if (temp == values[i].size_value) {
161 agp_bridge->previous_size =
162 agp_bridge->current_size = (void *) (values + i);
163
164 agp_bridge->aperture_size_idx = i;
165 return values[i].size;
166 }
167 }
168
169 return 0;
170 }
171
172 static void ati_tlbflush(struct agp_memory * mem)
173 {
174 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
175 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */
176 }
177
178 static void ati_cleanup(void)
179 {
180 struct aper_size_info_lvl2 *previous_size;
181 u32 temp;
182
183 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
184
185 /* Write back the previous size and disable gart translation */
186 if (is_r200()) {
187 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
188 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
189 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
190 } else {
191 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
192 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
193 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
194 }
195 iounmap((volatile u8 __iomem *)ati_generic_private.registers);
196 }
197
198
199 static int ati_configure(void)
200 {
201 phys_addr_t reg;
202 u32 temp;
203
204 /* Get the memory mapped registers */
205 reg = pci_resource_start(agp_bridge->dev, ATI_GART_MMBASE_BAR);
206 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
207
208 if (!ati_generic_private.registers)
209 return -ENOMEM;
210
211 if (is_r200())
212 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
213 else
214 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
215
216 /* address to map to */
217 /*
218 agp_bridge.gart_bus_addr = pci_bus_address(agp_bridge.dev,
219 AGP_APERTURE_BAR);
220 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
221 */
222 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
223 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/
224
225 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
226 pci_read_config_dword(agp_bridge->dev, PCI_COMMAND, &temp);
227 pci_write_config_dword(agp_bridge->dev, PCI_COMMAND, temp | (1<<14));
228
229 /* Write out the address of the gatt table */
230 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
231 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */
232
233 return 0;
234 }
235
236
237 #ifdef CONFIG_PM
238 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
239 {
240 pci_save_state(dev);
241 pci_set_power_state(dev, PCI_D3hot);
242
243 return 0;
244 }
245
246 static int agp_ati_resume(struct pci_dev *dev)
247 {
248 pci_set_power_state(dev, PCI_D0);
249 pci_restore_state(dev);
250
251 return ati_configure();
252 }
253 #endif
254
255 /*
256 *Since we don't need contiguous memory we just try
257 * to get the gatt table once
258 */
259
260 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
261 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
262 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
263 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
264 #undef GET_GATT
265 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
266 GET_PAGE_DIR_IDX(addr)]->remapped)
267
268 static int ati_insert_memory(struct agp_memory * mem,
269 off_t pg_start, int type)
270 {
271 int i, j, num_entries;
272 unsigned long __iomem *cur_gatt;
273 unsigned long addr;
274 int mask_type;
275
276 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
277
278 mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
279 if (mask_type != 0 || type != mem->type)
280 return -EINVAL;
281
282 if (mem->page_count == 0)
283 return 0;
284
285 if ((pg_start + mem->page_count) > num_entries)
286 return -EINVAL;
287
288 j = pg_start;
289 while (j < (pg_start + mem->page_count)) {
290 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
291 cur_gatt = GET_GATT(addr);
292 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
293 return -EBUSY;
294 j++;
295 }
296
297 if (!mem->is_flushed) {
298 /*CACHE_FLUSH(); */
299 global_cache_flush();
300 mem->is_flushed = true;
301 }
302
303 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
304 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
305 cur_gatt = GET_GATT(addr);
306 writel(agp_bridge->driver->mask_memory(agp_bridge,
307 page_to_phys(mem->pages[i]),
308 mem->type),
309 cur_gatt+GET_GATT_OFF(addr));
310 }
311 readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
312 agp_bridge->driver->tlb_flush(mem);
313 return 0;
314 }
315
316 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
317 int type)
318 {
319 int i;
320 unsigned long __iomem *cur_gatt;
321 unsigned long addr;
322 int mask_type;
323
324 mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
325 if (mask_type != 0 || type != mem->type)
326 return -EINVAL;
327
328 if (mem->page_count == 0)
329 return 0;
330
331 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
332 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
333 cur_gatt = GET_GATT(addr);
334 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
335 }
336
337 readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
338 agp_bridge->driver->tlb_flush(mem);
339 return 0;
340 }
341
342 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
343 {
344 struct aper_size_info_lvl2 *value;
345 struct ati_page_map page_dir;
346 unsigned long __iomem *cur_gatt;
347 unsigned long addr;
348 int retval;
349 u32 temp;
350 int i;
351 struct aper_size_info_lvl2 *current_size;
352
353 value = A_SIZE_LVL2(agp_bridge->current_size);
354 retval = ati_create_page_map(&page_dir);
355 if (retval != 0)
356 return retval;
357
358 retval = ati_create_gatt_pages(value->num_entries / 1024);
359 if (retval != 0) {
360 ati_free_page_map(&page_dir);
361 return retval;
362 }
363
364 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
365 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
366 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
367
368 /* Write out the size register */
369 current_size = A_SIZE_LVL2(agp_bridge->current_size);
370
371 if (is_r200()) {
372 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
373 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
374 | 0x00000001);
375 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
376 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
377 } else {
378 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
379 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
380 | 0x00000001);
381 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
382 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
383 }
384
385 /*
386 * Get the address for the gart region.
387 * This is a bus address even on the alpha, b/c its
388 * used to program the agp master not the cpu
389 */
390 addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
391 agp_bridge->gart_bus_addr = addr;
392
393 /* Calculate the agp offset */
394 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
395 writel(virt_to_phys(ati_generic_private.gatt_pages[i]->real) | 1,
396 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
397 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
398 }
399
400 for (i = 0; i < value->num_entries; i++) {
401 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
402 cur_gatt = GET_GATT(addr);
403 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
404 }
405
406 return 0;
407 }
408
409 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
410 {
411 struct ati_page_map page_dir;
412
413 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
414 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
415
416 ati_free_gatt_pages();
417 ati_free_page_map(&page_dir);
418 return 0;
419 }
420
421 static const struct agp_bridge_driver ati_generic_bridge = {
422 .owner = THIS_MODULE,
423 .aperture_sizes = ati_generic_sizes,
424 .size_type = LVL2_APER_SIZE,
425 .num_aperture_sizes = 7,
426 .needs_scratch_page = true,
427 .configure = ati_configure,
428 .fetch_size = ati_fetch_size,
429 .cleanup = ati_cleanup,
430 .tlb_flush = ati_tlbflush,
431 .mask_memory = agp_generic_mask_memory,
432 .masks = ati_generic_masks,
433 .agp_enable = agp_generic_enable,
434 .cache_flush = global_cache_flush,
435 .create_gatt_table = ati_create_gatt_table,
436 .free_gatt_table = ati_free_gatt_table,
437 .insert_memory = ati_insert_memory,
438 .remove_memory = ati_remove_memory,
439 .alloc_by_type = agp_generic_alloc_by_type,
440 .free_by_type = agp_generic_free_by_type,
441 .agp_alloc_page = agp_generic_alloc_page,
442 .agp_alloc_pages = agp_generic_alloc_pages,
443 .agp_destroy_page = agp_generic_destroy_page,
444 .agp_destroy_pages = agp_generic_destroy_pages,
445 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
446 };
447
448
449 static struct agp_device_ids ati_agp_device_ids[] =
450 {
451 {
452 .device_id = PCI_DEVICE_ID_ATI_RS100,
453 .chipset_name = "IGP320/M",
454 },
455 {
456 .device_id = PCI_DEVICE_ID_ATI_RS200,
457 .chipset_name = "IGP330/340/345/350/M",
458 },
459 {
460 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
461 .chipset_name = "IGP345M",
462 },
463 {
464 .device_id = PCI_DEVICE_ID_ATI_RS250,
465 .chipset_name = "IGP7000/M",
466 },
467 {
468 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
469 .chipset_name = "IGP9100/M",
470 },
471 {
472 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
473 .chipset_name = "IGP9100/M",
474 },
475 {
476 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
477 .chipset_name = "IGP9100/M",
478 },
479 {
480 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
481 .chipset_name = "IGP9100/M",
482 },
483 {
484 .device_id = PCI_DEVICE_ID_ATI_RS350_133,
485 .chipset_name = "IGP9000/M",
486 },
487 {
488 .device_id = PCI_DEVICE_ID_ATI_RS350_200,
489 .chipset_name = "IGP9100/M",
490 },
491 { }, /* dummy final entry, always present */
492 };
493
494 static int agp_ati_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
495 {
496 struct agp_device_ids *devs = ati_agp_device_ids;
497 struct agp_bridge_data *bridge;
498 u8 cap_ptr;
499 int j;
500
501 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
502 if (!cap_ptr)
503 return -ENODEV;
504
505 /* probe for known chipsets */
506 for (j = 0; devs[j].chipset_name; j++) {
507 if (pdev->device == devs[j].device_id)
508 goto found;
509 }
510
511 dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
512 pdev->vendor, pdev->device);
513 return -ENODEV;
514
515 found:
516 bridge = agp_alloc_bridge();
517 if (!bridge)
518 return -ENOMEM;
519
520 bridge->dev = pdev;
521 bridge->capndx = cap_ptr;
522
523 bridge->driver = &ati_generic_bridge;
524
525 dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
526
527 /* Fill in the mode register */
528 pci_read_config_dword(pdev,
529 bridge->capndx+PCI_AGP_STATUS,
530 &bridge->mode);
531
532 pci_set_drvdata(pdev, bridge);
533 return agp_add_bridge(bridge);
534 }
535
536 static void agp_ati_remove(struct pci_dev *pdev)
537 {
538 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
539
540 agp_remove_bridge(bridge);
541 agp_put_bridge(bridge);
542 }
543
544 static const struct pci_device_id agp_ati_pci_table[] = {
545 {
546 .class = (PCI_CLASS_BRIDGE_HOST << 8),
547 .class_mask = ~0,
548 .vendor = PCI_VENDOR_ID_ATI,
549 .device = PCI_ANY_ID,
550 .subvendor = PCI_ANY_ID,
551 .subdevice = PCI_ANY_ID,
552 },
553 { }
554 };
555
556 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
557
558 static struct pci_driver agp_ati_pci_driver = {
559 .name = "agpgart-ati",
560 .id_table = agp_ati_pci_table,
561 .probe = agp_ati_probe,
562 .remove = agp_ati_remove,
563 #ifdef CONFIG_PM
564 .suspend = agp_ati_suspend,
565 .resume = agp_ati_resume,
566 #endif
567 };
568
569 static int __init agp_ati_init(void)
570 {
571 if (agp_off)
572 return -EINVAL;
573 return pci_register_driver(&agp_ati_pci_driver);
574 }
575
576 static void __exit agp_ati_cleanup(void)
577 {
578 pci_unregister_driver(&agp_ati_pci_driver);
579 }
580
581 module_init(agp_ati_init);
582 module_exit(agp_ati_cleanup);
583
584 MODULE_AUTHOR("Dave Jones");
585 MODULE_LICENSE("GPL and additional rights");
586
Linux with added FPC-III support