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