1
2
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
28static 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
39static struct gatt_mask ati_generic_masks[] =
40{
41 { .mask = 1, .type = 0}
42};
43
44
45struct ati_page_map {
46 unsigned long *real;
47 unsigned long __iomem *remapped;
48};
49
50static 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
56static 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);
71 }
72
73 return 0;
74}
75
76
77static 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
85static 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
104static 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 = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
112 if (tables == NULL)
113 return -ENOMEM;
114
115 for (i = 0; i < nr_tables; i++) {
116 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
117 tables[i] = entry;
118 if (entry == NULL) {
119 retval = -ENOMEM;
120 break;
121 }
122 retval = ati_create_page_map(entry);
123 if (retval != 0)
124 break;
125 }
126 ati_generic_private.num_tables = i;
127 ati_generic_private.gatt_pages = tables;
128
129 if (retval != 0)
130 ati_free_gatt_pages();
131
132 return retval;
133}
134
135static int is_r200(void)
136{
137 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
138 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
139 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
140 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
141 return 1;
142 return 0;
143}
144
145static int ati_fetch_size(void)
146{
147 int i;
148 u32 temp;
149 struct aper_size_info_lvl2 *values;
150
151 if (is_r200())
152 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
153 else
154 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
155
156 temp = (temp & 0x0000000e);
157 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
158 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
159 if (temp == values[i].size_value) {
160 agp_bridge->previous_size =
161 agp_bridge->current_size = (void *) (values + i);
162
163 agp_bridge->aperture_size_idx = i;
164 return values[i].size;
165 }
166 }
167
168 return 0;
169}
170
171static void ati_tlbflush(struct agp_memory * mem)
172{
173 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
174 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
175}
176
177static void ati_cleanup(void)
178{
179 struct aper_size_info_lvl2 *previous_size;
180 u32 temp;
181
182 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
183
184
185 if (is_r200()) {
186 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
187 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
188 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
189 } else {
190 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
191 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
192 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
193 }
194 iounmap((volatile u8 __iomem *)ati_generic_private.registers);
195}
196
197
198static int ati_configure(void)
199{
200 phys_addr_t reg;
201 u32 temp;
202
203
204 reg = pci_resource_start(agp_bridge->dev, ATI_GART_MMBASE_BAR);
205 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
206
207 if (!ati_generic_private.registers)
208 return -ENOMEM;
209
210 if (is_r200())
211 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
212 else
213 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
214
215
216
217
218
219
220
221 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
222 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);
223
224
225 pci_read_config_dword(agp_bridge->dev, PCI_COMMAND, &temp);
226 pci_write_config_dword(agp_bridge->dev, PCI_COMMAND, temp | (1<<14));
227
228
229 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
230 readl(ati_generic_private.registers+ATI_GART_BASE);
231
232 return 0;
233}
234
235
236#ifdef CONFIG_PM
237static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
238{
239 pci_save_state(dev);
240 pci_set_power_state(dev, PCI_D3hot);
241
242 return 0;
243}
244
245static int agp_ati_resume(struct pci_dev *dev)
246{
247 pci_set_power_state(dev, PCI_D0);
248 pci_restore_state(dev);
249
250 return ati_configure();
251}
252#endif
253
254
255
256
257
258
259#define GET_PAGE_DIR_OFF(addr) (addr >> 22)
260#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
261 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
262#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
263#undef GET_GATT
264#define GET_GATT(addr) (ati_generic_private.gatt_pages[\
265 GET_PAGE_DIR_IDX(addr)]->remapped)
266
267static int ati_insert_memory(struct agp_memory * mem,
268 off_t pg_start, int type)
269{
270 int i, j, num_entries;
271 unsigned long __iomem *cur_gatt;
272 unsigned long addr;
273 int mask_type;
274
275 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
276
277 mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
278 if (mask_type != 0 || type != mem->type)
279 return -EINVAL;
280
281 if (mem->page_count == 0)
282 return 0;
283
284 if ((pg_start + mem->page_count) > num_entries)
285 return -EINVAL;
286
287 j = pg_start;
288 while (j < (pg_start + mem->page_count)) {
289 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
290 cur_gatt = GET_GATT(addr);
291 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
292 return -EBUSY;
293 j++;
294 }
295
296 if (!mem->is_flushed) {
297
298 global_cache_flush();
299 mem->is_flushed = true;
300 }
301
302 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
303 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
304 cur_gatt = GET_GATT(addr);
305 writel(agp_bridge->driver->mask_memory(agp_bridge,
306 page_to_phys(mem->pages[i]),
307 mem->type),
308 cur_gatt+GET_GATT_OFF(addr));
309 }
310 readl(GET_GATT(agp_bridge->gart_bus_addr));
311 agp_bridge->driver->tlb_flush(mem);
312 return 0;
313}
314
315static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
316 int type)
317{
318 int i;
319 unsigned long __iomem *cur_gatt;
320 unsigned long addr;
321 int mask_type;
322
323 mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
324 if (mask_type != 0 || type != mem->type)
325 return -EINVAL;
326
327 if (mem->page_count == 0)
328 return 0;
329
330 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
331 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
332 cur_gatt = GET_GATT(addr);
333 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
334 }
335
336 readl(GET_GATT(agp_bridge->gart_bus_addr));
337 agp_bridge->driver->tlb_flush(mem);
338 return 0;
339}
340
341static int ati_create_gatt_table(struct agp_bridge_data *bridge)
342{
343 struct aper_size_info_lvl2 *value;
344 struct ati_page_map page_dir;
345 unsigned long __iomem *cur_gatt;
346 unsigned long addr;
347 int retval;
348 u32 temp;
349 int i;
350 struct aper_size_info_lvl2 *current_size;
351
352 value = A_SIZE_LVL2(agp_bridge->current_size);
353 retval = ati_create_page_map(&page_dir);
354 if (retval != 0)
355 return retval;
356
357 retval = ati_create_gatt_pages(value->num_entries / 1024);
358 if (retval != 0) {
359 ati_free_page_map(&page_dir);
360 return retval;
361 }
362
363 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
364 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
365 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
366
367
368 current_size = A_SIZE_LVL2(agp_bridge->current_size);
369
370 if (is_r200()) {
371 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
372 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
373 | 0x00000001);
374 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
375 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
376 } else {
377 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
378 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
379 | 0x00000001);
380 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
381 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
382 }
383
384
385
386
387
388
389 addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
390 agp_bridge->gart_bus_addr = addr;
391
392
393 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
394 writel(virt_to_phys(ati_generic_private.gatt_pages[i]->real) | 1,
395 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
396 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));
397 }
398
399 for (i = 0; i < value->num_entries; i++) {
400 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
401 cur_gatt = GET_GATT(addr);
402 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
403 }
404
405 return 0;
406}
407
408static int ati_free_gatt_table(struct agp_bridge_data *bridge)
409{
410 struct ati_page_map page_dir;
411
412 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
413 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
414
415 ati_free_gatt_pages();
416 ati_free_page_map(&page_dir);
417 return 0;
418}
419
420static const struct agp_bridge_driver ati_generic_bridge = {
421 .owner = THIS_MODULE,
422 .aperture_sizes = ati_generic_sizes,
423 .size_type = LVL2_APER_SIZE,
424 .num_aperture_sizes = 7,
425 .needs_scratch_page = true,
426 .configure = ati_configure,
427 .fetch_size = ati_fetch_size,
428 .cleanup = ati_cleanup,
429 .tlb_flush = ati_tlbflush,
430 .mask_memory = agp_generic_mask_memory,
431 .masks = ati_generic_masks,
432 .agp_enable = agp_generic_enable,
433 .cache_flush = global_cache_flush,
434 .create_gatt_table = ati_create_gatt_table,
435 .free_gatt_table = ati_free_gatt_table,
436 .insert_memory = ati_insert_memory,
437 .remove_memory = ati_remove_memory,
438 .alloc_by_type = agp_generic_alloc_by_type,
439 .free_by_type = agp_generic_free_by_type,
440 .agp_alloc_page = agp_generic_alloc_page,
441 .agp_alloc_pages = agp_generic_alloc_pages,
442 .agp_destroy_page = agp_generic_destroy_page,
443 .agp_destroy_pages = agp_generic_destroy_pages,
444 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
445};
446
447
448static struct agp_device_ids ati_agp_device_ids[] =
449{
450 {
451 .device_id = PCI_DEVICE_ID_ATI_RS100,
452 .chipset_name = "IGP320/M",
453 },
454 {
455 .device_id = PCI_DEVICE_ID_ATI_RS200,
456 .chipset_name = "IGP330/340/345/350/M",
457 },
458 {
459 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
460 .chipset_name = "IGP345M",
461 },
462 {
463 .device_id = PCI_DEVICE_ID_ATI_RS250,
464 .chipset_name = "IGP7000/M",
465 },
466 {
467 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
468 .chipset_name = "IGP9100/M",
469 },
470 {
471 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
472 .chipset_name = "IGP9100/M",
473 },
474 {
475 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
476 .chipset_name = "IGP9100/M",
477 },
478 {
479 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
480 .chipset_name = "IGP9100/M",
481 },
482 {
483 .device_id = PCI_DEVICE_ID_ATI_RS350_133,
484 .chipset_name = "IGP9000/M",
485 },
486 {
487 .device_id = PCI_DEVICE_ID_ATI_RS350_200,
488 .chipset_name = "IGP9100/M",
489 },
490 { },
491};
492
493static int agp_ati_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
494{
495 struct agp_device_ids *devs = ati_agp_device_ids;
496 struct agp_bridge_data *bridge;
497 u8 cap_ptr;
498 int j;
499
500 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
501 if (!cap_ptr)
502 return -ENODEV;
503
504
505 for (j = 0; devs[j].chipset_name; j++) {
506 if (pdev->device == devs[j].device_id)
507 goto found;
508 }
509
510 dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
511 pdev->vendor, pdev->device);
512 return -ENODEV;
513
514found:
515 bridge = agp_alloc_bridge();
516 if (!bridge)
517 return -ENOMEM;
518
519 bridge->dev = pdev;
520 bridge->capndx = cap_ptr;
521
522 bridge->driver = &ati_generic_bridge;
523
524 dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
525
526
527 pci_read_config_dword(pdev,
528 bridge->capndx+PCI_AGP_STATUS,
529 &bridge->mode);
530
531 pci_set_drvdata(pdev, bridge);
532 return agp_add_bridge(bridge);
533}
534
535static void agp_ati_remove(struct pci_dev *pdev)
536{
537 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
538
539 agp_remove_bridge(bridge);
540 agp_put_bridge(bridge);
541}
542
543static const struct pci_device_id agp_ati_pci_table[] = {
544 {
545 .class = (PCI_CLASS_BRIDGE_HOST << 8),
546 .class_mask = ~0,
547 .vendor = PCI_VENDOR_ID_ATI,
548 .device = PCI_ANY_ID,
549 .subvendor = PCI_ANY_ID,
550 .subdevice = PCI_ANY_ID,
551 },
552 { }
553};
554
555MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
556
557static struct pci_driver agp_ati_pci_driver = {
558 .name = "agpgart-ati",
559 .id_table = agp_ati_pci_table,
560 .probe = agp_ati_probe,
561 .remove = agp_ati_remove,
562#ifdef CONFIG_PM
563 .suspend = agp_ati_suspend,
564 .resume = agp_ati_resume,
565#endif
566};
567
568static int __init agp_ati_init(void)
569{
570 if (agp_off)
571 return -EINVAL;
572 return pci_register_driver(&agp_ati_pci_driver);
573}
574
575static void __exit agp_ati_cleanup(void)
576{
577 pci_unregister_driver(&agp_ati_pci_driver);
578}
579
580module_init(agp_ati_init);
581module_exit(agp_ati_cleanup);
582
583MODULE_AUTHOR("Dave Jones");
584MODULE_LICENSE("GPL and additional rights");
585
586
