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Merge x86-64 update from Andi
[deliverable/linux.git] / drivers / char / agp / ati-agp.c
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 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
45 typedef struct _ati_page_map {
46 unsigned long *real;
47 unsigned long __iomem *remapped;
48 } ati_page_map;
49
50 static struct _ati_generic_private {
51 volatile u8 __iomem *registers;
52 ati_page_map **gatt_pages;
53 int num_tables;
54 } ati_generic_private;
55
56 static int ati_create_page_map(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 SetPageReserved(virt_to_page(page_map->real));
65 err = map_page_into_agp(virt_to_page(page_map->real));
66 page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
67 PAGE_SIZE);
68 if (page_map->remapped == NULL || err) {
69 ClearPageReserved(virt_to_page(page_map->real));
70 free_page((unsigned long) page_map->real);
71 page_map->real = NULL;
72 return -ENOMEM;
73 }
74 /*CACHE_FLUSH();*/
75 global_cache_flush();
76
77 for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
78 writel(agp_bridge->scratch_page, page_map->remapped+i);
79 readl(page_map->remapped+i); /* PCI Posting. */
80 }
81
82 return 0;
83 }
84
85
86 static void ati_free_page_map(ati_page_map *page_map)
87 {
88 unmap_page_from_agp(virt_to_page(page_map->real));
89 iounmap(page_map->remapped);
90 ClearPageReserved(virt_to_page(page_map->real));
91 free_page((unsigned long) page_map->real);
92 }
93
94
95 static void ati_free_gatt_pages(void)
96 {
97 int i;
98 ati_page_map **tables;
99 ati_page_map *entry;
100
101 tables = ati_generic_private.gatt_pages;
102 for(i = 0; i < ati_generic_private.num_tables; i++) {
103 entry = tables[i];
104 if (entry != NULL) {
105 if (entry->real != NULL)
106 ati_free_page_map(entry);
107 kfree(entry);
108 }
109 }
110 kfree(tables);
111 }
112
113
114 static int ati_create_gatt_pages(int nr_tables)
115 {
116 ati_page_map **tables;
117 ati_page_map *entry;
118 int retval = 0;
119 int i;
120
121 tables = kzalloc((nr_tables + 1) * sizeof(ati_page_map *),GFP_KERNEL);
122 if (tables == NULL)
123 return -ENOMEM;
124
125 for (i = 0; i < nr_tables; i++) {
126 entry = kzalloc(sizeof(ati_page_map), GFP_KERNEL);
127 if (entry == NULL) {
128 while (i>0) {
129 kfree (tables[i-1]);
130 i--;
131 }
132 kfree (tables);
133 tables = NULL;
134 retval = -ENOMEM;
135 break;
136 }
137 tables[i] = entry;
138 retval = ati_create_page_map(entry);
139 if (retval != 0) break;
140 }
141 ati_generic_private.num_tables = nr_tables;
142 ati_generic_private.gatt_pages = tables;
143
144 if (retval != 0) ati_free_gatt_pages();
145
146 return retval;
147 }
148
149 static int is_r200(void)
150 {
151 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
152 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
153 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
154 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
155 return 1;
156 return 0;
157 }
158
159 static int ati_fetch_size(void)
160 {
161 int i;
162 u32 temp;
163 struct aper_size_info_lvl2 *values;
164
165 if (is_r200())
166 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
167 else
168 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
169
170 temp = (temp & 0x0000000e);
171 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
172 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
173 if (temp == values[i].size_value) {
174 agp_bridge->previous_size =
175 agp_bridge->current_size = (void *) (values + i);
176
177 agp_bridge->aperture_size_idx = i;
178 return values[i].size;
179 }
180 }
181
182 return 0;
183 }
184
185 static void ati_tlbflush(struct agp_memory * mem)
186 {
187 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
188 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */
189 }
190
191 static void ati_cleanup(void)
192 {
193 struct aper_size_info_lvl2 *previous_size;
194 u32 temp;
195
196 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
197
198 /* Write back the previous size and disable gart translation */
199 if (is_r200()) {
200 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
201 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
202 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
203 } else {
204 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
205 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
206 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
207 }
208 iounmap((volatile u8 __iomem *)ati_generic_private.registers);
209 }
210
211
212 static int ati_configure(void)
213 {
214 u32 temp;
215
216 /* Get the memory mapped registers */
217 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
218 temp = (temp & 0xfffff000);
219 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
220
221 if (is_r200())
222 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
223 else
224 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
225
226 /* address to map too */
227 /*
228 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
229 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
230 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
231 */
232 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
233 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/
234
235 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
236 pci_read_config_dword(agp_bridge->dev, 4, &temp);
237 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
238
239 /* Write out the address of the gatt table */
240 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
241 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */
242
243 return 0;
244 }
245
246
247 /*
248 *Since we don't need contigious memory we just try
249 * to get the gatt table once
250 */
251
252 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
253 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
254 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
255 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
256 #undef GET_GATT
257 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
258 GET_PAGE_DIR_IDX(addr)]->remapped)
259
260 static int ati_insert_memory(struct agp_memory * mem,
261 off_t pg_start, int type)
262 {
263 int i, j, num_entries;
264 unsigned long __iomem *cur_gatt;
265 unsigned long addr;
266
267 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
268
269 if (type != 0 || mem->type != 0)
270 return -EINVAL;
271
272 if ((pg_start + mem->page_count) > num_entries)
273 return -EINVAL;
274
275 j = pg_start;
276 while (j < (pg_start + mem->page_count)) {
277 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
278 cur_gatt = GET_GATT(addr);
279 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
280 return -EBUSY;
281 j++;
282 }
283
284 if (mem->is_flushed == FALSE) {
285 /*CACHE_FLUSH(); */
286 global_cache_flush();
287 mem->is_flushed = TRUE;
288 }
289
290 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
291 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
292 cur_gatt = GET_GATT(addr);
293 writel(agp_bridge->driver->mask_memory(agp_bridge,
294 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
295 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
296 }
297 agp_bridge->driver->tlb_flush(mem);
298 return 0;
299 }
300
301 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
302 int type)
303 {
304 int i;
305 unsigned long __iomem *cur_gatt;
306 unsigned long addr;
307
308 if (type != 0 || mem->type != 0) {
309 return -EINVAL;
310 }
311 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
312 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
313 cur_gatt = GET_GATT(addr);
314 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
315 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
316 }
317
318 agp_bridge->driver->tlb_flush(mem);
319 return 0;
320 }
321
322 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
323 {
324 struct aper_size_info_lvl2 *value;
325 ati_page_map page_dir;
326 unsigned long addr;
327 int retval;
328 u32 temp;
329 int i;
330 struct aper_size_info_lvl2 *current_size;
331
332 value = A_SIZE_LVL2(agp_bridge->current_size);
333 retval = ati_create_page_map(&page_dir);
334 if (retval != 0)
335 return retval;
336
337 retval = ati_create_gatt_pages(value->num_entries / 1024);
338 if (retval != 0) {
339 ati_free_page_map(&page_dir);
340 return retval;
341 }
342
343 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
344 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
345 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
346
347 /* Write out the size register */
348 current_size = A_SIZE_LVL2(agp_bridge->current_size);
349
350 if (is_r200()) {
351 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
352 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
353 | 0x00000001);
354 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
355 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
356 } else {
357 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
358 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
359 | 0x00000001);
360 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
361 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
362 }
363
364 /*
365 * Get the address for the gart region.
366 * This is a bus address even on the alpha, b/c its
367 * used to program the agp master not the cpu
368 */
369 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
370 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
371 agp_bridge->gart_bus_addr = addr;
372
373 /* Calculate the agp offset */
374 for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
375 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
376 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
377 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
378 }
379
380 return 0;
381 }
382
383 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
384 {
385 ati_page_map page_dir;
386
387 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
388 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
389
390 ati_free_gatt_pages();
391 ati_free_page_map(&page_dir);
392 return 0;
393 }
394
395 static struct agp_bridge_driver ati_generic_bridge = {
396 .owner = THIS_MODULE,
397 .aperture_sizes = ati_generic_sizes,
398 .size_type = LVL2_APER_SIZE,
399 .num_aperture_sizes = 7,
400 .configure = ati_configure,
401 .fetch_size = ati_fetch_size,
402 .cleanup = ati_cleanup,
403 .tlb_flush = ati_tlbflush,
404 .mask_memory = agp_generic_mask_memory,
405 .masks = ati_generic_masks,
406 .agp_enable = agp_generic_enable,
407 .cache_flush = global_cache_flush,
408 .create_gatt_table = ati_create_gatt_table,
409 .free_gatt_table = ati_free_gatt_table,
410 .insert_memory = ati_insert_memory,
411 .remove_memory = ati_remove_memory,
412 .alloc_by_type = agp_generic_alloc_by_type,
413 .free_by_type = agp_generic_free_by_type,
414 .agp_alloc_page = agp_generic_alloc_page,
415 .agp_destroy_page = agp_generic_destroy_page,
416 };
417
418
419 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
420 {
421 {
422 .device_id = PCI_DEVICE_ID_ATI_RS100,
423 .chipset_name = "IGP320/M",
424 },
425 {
426 .device_id = PCI_DEVICE_ID_ATI_RS200,
427 .chipset_name = "IGP330/340/345/350/M",
428 },
429 {
430 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
431 .chipset_name = "IGP345M",
432 },
433 {
434 .device_id = PCI_DEVICE_ID_ATI_RS250,
435 .chipset_name = "IGP7000/M",
436 },
437 {
438 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
439 .chipset_name = "IGP9100/M",
440 },
441 {
442 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
443 .chipset_name = "IGP9100/M",
444 },
445 {
446 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
447 .chipset_name = "IGP9100/M",
448 },
449 {
450 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
451 .chipset_name = "IGP9100/M",
452 },
453 { }, /* dummy final entry, always present */
454 };
455
456 static int __devinit agp_ati_probe(struct pci_dev *pdev,
457 const struct pci_device_id *ent)
458 {
459 struct agp_device_ids *devs = ati_agp_device_ids;
460 struct agp_bridge_data *bridge;
461 u8 cap_ptr;
462 int j;
463
464 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
465 if (!cap_ptr)
466 return -ENODEV;
467
468 /* probe for known chipsets */
469 for (j = 0; devs[j].chipset_name; j++) {
470 if (pdev->device == devs[j].device_id)
471 goto found;
472 }
473
474 printk(KERN_ERR PFX
475 "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
476 return -ENODEV;
477
478 found:
479 bridge = agp_alloc_bridge();
480 if (!bridge)
481 return -ENOMEM;
482
483 bridge->dev = pdev;
484 bridge->capndx = cap_ptr;
485
486 bridge->driver = &ati_generic_bridge;
487
488
489 printk(KERN_INFO PFX "Detected Ati %s chipset\n",
490 devs[j].chipset_name);
491
492 /* Fill in the mode register */
493 pci_read_config_dword(pdev,
494 bridge->capndx+PCI_AGP_STATUS,
495 &bridge->mode);
496
497 pci_set_drvdata(pdev, bridge);
498 return agp_add_bridge(bridge);
499 }
500
501 static void __devexit agp_ati_remove(struct pci_dev *pdev)
502 {
503 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
504
505 agp_remove_bridge(bridge);
506 agp_put_bridge(bridge);
507 }
508
509 static struct pci_device_id agp_ati_pci_table[] = {
510 {
511 .class = (PCI_CLASS_BRIDGE_HOST << 8),
512 .class_mask = ~0,
513 .vendor = PCI_VENDOR_ID_ATI,
514 .device = PCI_ANY_ID,
515 .subvendor = PCI_ANY_ID,
516 .subdevice = PCI_ANY_ID,
517 },
518 { }
519 };
520
521 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
522
523 static struct pci_driver agp_ati_pci_driver = {
524 .name = "agpgart-ati",
525 .id_table = agp_ati_pci_table,
526 .probe = agp_ati_probe,
527 .remove = agp_ati_remove,
528 };
529
530 static int __init agp_ati_init(void)
531 {
532 if (agp_off)
533 return -EINVAL;
534 return pci_register_driver(&agp_ati_pci_driver);
535 }
536
537 static void __exit agp_ati_cleanup(void)
538 {
539 pci_unregister_driver(&agp_ati_pci_driver);
540 }
541
542 module_init(agp_ati_init);
543 module_exit(agp_ati_cleanup);
544
545 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
546 MODULE_LICENSE("GPL and additional rights");
547
Linux kernel - Deliverables
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