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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / agp / ati-agp.c
blob757dde006fc96356f23c129fe053753dcf1d0b61
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/agp_backend.h>
10 #include <asm/agp.h>
11 #include "agp.h"
12
13 #define ATI_GART_MMBASE_ADDR 0x14
14 #define ATI_RS100_APSIZE 0xac
15 #define ATI_RS100_IG_AGPMODE 0xb0
16 #define ATI_RS300_APSIZE 0xf8
17 #define ATI_RS300_IG_AGPMODE 0xfc
18 #define ATI_GART_FEATURE_ID 0x00
19 #define ATI_GART_BASE 0x04
20 #define ATI_GART_CACHE_SZBASE 0x08
21 #define ATI_GART_CACHE_CNTRL 0x0c
22 #define ATI_GART_CACHE_ENTRY_CNTRL 0x10
23
24
25 static struct aper_size_info_lvl2 ati_generic_sizes[7] =
26 {
27 {2048, 524288, 0x0000000c},
28 {1024, 262144, 0x0000000a},
29 {512, 131072, 0x00000008},
30 {256, 65536, 0x00000006},
31 {128, 32768, 0x00000004},
32 {64, 16384, 0x00000002},
33 {32, 8192, 0x00000000}
34 };
35
36 static struct gatt_mask ati_generic_masks[] =
37 {
38 { .mask = 1, .type = 0}
39 };
40
41
42
43 typedef struct _ati_page_map {
44 unsigned long *real;
45 unsigned long __iomem *remapped;
46 } ati_page_map;
47
48 static struct _ati_generic_private {
49 volatile u8 __iomem *registers;
50 ati_page_map **gatt_pages;
51 int num_tables;
52 } ati_generic_private;
53
54 static int ati_create_page_map(ati_page_map *page_map)
55 {
56 int i, err = 0;
57
58 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
59 if (page_map->real == NULL)
60 return -ENOMEM;
61
62 SetPageReserved(virt_to_page(page_map->real));
63 err = map_page_into_agp(virt_to_page(page_map->real));
64 page_map->remapped = ioremap_nocache(virt_to_phys(page_map->real),
65 PAGE_SIZE);
66 if (page_map->remapped == NULL || err) {
67 ClearPageReserved(virt_to_page(page_map->real));
68 free_page((unsigned long) page_map->real);
69 page_map->real = NULL;
70 return -ENOMEM;
71 }
72 /*CACHE_FLUSH();*/
73 global_cache_flush();
74
75 for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
76 writel(agp_bridge->scratch_page, page_map->remapped+i);
77 readl(page_map->remapped+i); /* PCI Posting. */
78 }
79
80 return 0;
81 }
82
83
84 static void ati_free_page_map(ati_page_map *page_map)
85 {
86 unmap_page_from_agp(virt_to_page(page_map->real));
87 iounmap(page_map->remapped);
88 ClearPageReserved(virt_to_page(page_map->real));
89 free_page((unsigned long) page_map->real);
90 }
91
92
93 static void ati_free_gatt_pages(void)
94 {
95 int i;
96 ati_page_map **tables;
97 ati_page_map *entry;
98
99 tables = ati_generic_private.gatt_pages;
100 for(i = 0; i < ati_generic_private.num_tables; i++) {
101 entry = tables[i];
102 if (entry != NULL) {
103 if (entry->real != NULL)
104 ati_free_page_map(entry);
105 kfree(entry);
106 }
107 }
108 kfree(tables);
109 }
110
111
112 static int ati_create_gatt_pages(int nr_tables)
113 {
114 ati_page_map **tables;
115 ati_page_map *entry;
116 int retval = 0;
117 int i;
118
119 tables = kmalloc((nr_tables + 1) * sizeof(ati_page_map *),
120 GFP_KERNEL);
121 if (tables == NULL)
122 return -ENOMEM;
123
124 memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1));
125 for (i = 0; i < nr_tables; i++) {
126 entry = kmalloc(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 memset(entry, 0, sizeof(ati_page_map));
138 tables[i] = entry;
139 retval = ati_create_page_map(entry);
140 if (retval != 0) break;
141 }
142 ati_generic_private.num_tables = nr_tables;
143 ati_generic_private.gatt_pages = tables;
144
145 if (retval != 0) ati_free_gatt_pages();
146
147 return retval;
148 }
149
150 static int is_r200(void)
151 {
152 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
153 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
154 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
155 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
156 return 1;
157 return 0;
158 }
159
160 static int ati_fetch_size(void)
161 {
162 int i;
163 u32 temp;
164 struct aper_size_info_lvl2 *values;
165
166 if (is_r200())
167 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
168 else
169 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
170
171 temp = (temp & 0x0000000e);
172 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
173 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
174 if (temp == values[i].size_value) {
175 agp_bridge->previous_size =
176 agp_bridge->current_size = (void *) (values + i);
177
178 agp_bridge->aperture_size_idx = i;
179 return values[i].size;
180 }
181 }
182
183 return 0;
184 }
185
186 static void ati_tlbflush(struct agp_memory * mem)
187 {
188 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
189 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */
190 }
191
192 static void ati_cleanup(void)
193 {
194 struct aper_size_info_lvl2 *previous_size;
195 u32 temp;
196
197 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
198
199 /* Write back the previous size and disable gart translation */
200 if (is_r200()) {
201 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
202 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
203 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
204 } else {
205 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
206 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
207 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
208 }
209 iounmap((volatile u8 __iomem *)ati_generic_private.registers);
210 }
211
212
213 static int ati_configure(void)
214 {
215 u32 temp;
216
217 /* Get the memory mapped registers */
218 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
219 temp = (temp & 0xfffff000);
220 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
221
222 if (is_r200())
223 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
224 else
225 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
226
227 /* address to map too */
228 /*
229 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
230 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
231 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
232 */
233 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
234 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/
235
236 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
237 pci_read_config_dword(agp_bridge->dev, 4, &temp);
238 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
239
240 /* Write out the address of the gatt table */
241 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
242 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */
243
244 return 0;
245 }
246
247
248 /*
249 *Since we don't need contigious memory we just try
250 * to get the gatt table once
251 */
252
253 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
254 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
255 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
256 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
257 #undef GET_GATT
258 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
259 GET_PAGE_DIR_IDX(addr)]->remapped)
260
261 static int ati_insert_memory(struct agp_memory * mem,
262 off_t pg_start, int type)
263 {
264 int i, j, num_entries;
265 unsigned long __iomem *cur_gatt;
266 unsigned long addr;
267
268 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
269
270 if (type != 0 || mem->type != 0)
271 return -EINVAL;
272
273 if ((pg_start + mem->page_count) > num_entries)
274 return -EINVAL;
275
276 j = pg_start;
277 while (j < (pg_start + mem->page_count)) {
278 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
279 cur_gatt = GET_GATT(addr);
280 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
281 return -EBUSY;
282 j++;
283 }
284
285 if (mem->is_flushed == FALSE) {
286 /*CACHE_FLUSH(); */
287 global_cache_flush();
288 mem->is_flushed = TRUE;
289 }
290
291 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
292 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
293 cur_gatt = GET_GATT(addr);
294 writel(agp_bridge->driver->mask_memory(agp_bridge,
295 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
296 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
297 }
298 agp_bridge->driver->tlb_flush(mem);
299 return 0;
300 }
301
302 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
303 int type)
304 {
305 int i;
306 unsigned long __iomem *cur_gatt;
307 unsigned long addr;
308
309 if (type != 0 || mem->type != 0) {
310 return -EINVAL;
311 }
312 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
313 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
314 cur_gatt = GET_GATT(addr);
315 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
316 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
317 }
318
319 agp_bridge->driver->tlb_flush(mem);
320 return 0;
321 }
322
323 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
324 {
325 struct aper_size_info_lvl2 *value;
326 ati_page_map page_dir;
327 unsigned long addr;
328 int retval;
329 u32 temp;
330 int i;
331 struct aper_size_info_lvl2 *current_size;
332
333 value = A_SIZE_LVL2(agp_bridge->current_size);
334 retval = ati_create_page_map(&page_dir);
335 if (retval != 0)
336 return retval;
337
338 retval = ati_create_gatt_pages(value->num_entries / 1024);
339 if (retval != 0) {
340 ati_free_page_map(&page_dir);
341 return retval;
342 }
343
344 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
345 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
346 agp_bridge->gatt_bus_addr = virt_to_bus(page_dir.real);
347
348 /* Write out the size register */
349 current_size = A_SIZE_LVL2(agp_bridge->current_size);
350
351 if (is_r200()) {
352 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
353 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
354 | 0x00000001);
355 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
356 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
357 } else {
358 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
359 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
360 | 0x00000001);
361 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
362 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
363 }
364
365 /*
366 * Get the address for the gart region.
367 * This is a bus address even on the alpha, b/c its
368 * used to program the agp master not the cpu
369 */
370 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
371 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
372 agp_bridge->gart_bus_addr = addr;
373
374 /* Calculate the agp offset */
375 for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
376 writel(virt_to_bus(ati_generic_private.gatt_pages[i]->real) | 1,
377 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
378 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
379 }
380
381 return 0;
382 }
383
384 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
385 {
386 ati_page_map page_dir;
387
388 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
389 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
390
391 ati_free_gatt_pages();
392 ati_free_page_map(&page_dir);
393 return 0;
394 }
395
396 struct agp_bridge_driver ati_generic_bridge = {
397 .owner = THIS_MODULE,
398 .aperture_sizes = ati_generic_sizes,
399 .size_type = LVL2_APER_SIZE,
400 .num_aperture_sizes = 7,
401 .configure = ati_configure,
402 .fetch_size = ati_fetch_size,
403 .cleanup = ati_cleanup,
404 .tlb_flush = ati_tlbflush,
405 .mask_memory = agp_generic_mask_memory,
406 .masks = ati_generic_masks,
407 .agp_enable = agp_generic_enable,
408 .cache_flush = global_cache_flush,
409 .create_gatt_table = ati_create_gatt_table,
410 .free_gatt_table = ati_free_gatt_table,
411 .insert_memory = ati_insert_memory,
412 .remove_memory = ati_remove_memory,
413 .alloc_by_type = agp_generic_alloc_by_type,
414 .free_by_type = agp_generic_free_by_type,
415 .agp_alloc_page = agp_generic_alloc_page,
416 .agp_destroy_page = agp_generic_destroy_page,
417 };
418
419
420 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
421 {
422 {
423 .device_id = PCI_DEVICE_ID_ATI_RS100,
424 .chipset_name = "IGP320/M",
425 },
426 {
427 .device_id = PCI_DEVICE_ID_ATI_RS200,
428 .chipset_name = "IGP330/340/345/350/M",
429 },
430 {
431 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
432 .chipset_name = "IGP345M",
433 },
434 {
435 .device_id = PCI_DEVICE_ID_ATI_RS250,
436 .chipset_name = "IGP7000/M",
437 },
438 {
439 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
440 .chipset_name = "IGP9100/M",
441 },
442 {
443 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
444 .chipset_name = "IGP9100/M",
445 },
446 {
447 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
448 .chipset_name = "IGP9100/M",
449 },
450 {
451 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
452 .chipset_name = "IGP9100/M",
453 },
454 { }, /* dummy final entry, always present */
455 };
456
457 static int __devinit agp_ati_probe(struct pci_dev *pdev,
458 const struct pci_device_id *ent)
459 {
460 struct agp_device_ids *devs = ati_agp_device_ids;
461 struct agp_bridge_data *bridge;
462 u8 cap_ptr;
463 int j;
464
465 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
466 if (!cap_ptr)
467 return -ENODEV;
468
469 /* probe for known chipsets */
470 for (j = 0; devs[j].chipset_name; j++) {
471 if (pdev->device == devs[j].device_id)
472 goto found;
473 }
474
475 printk(KERN_ERR PFX
476 "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
477 return -ENODEV;
478
479 found:
480 bridge = agp_alloc_bridge();
481 if (!bridge)
482 return -ENOMEM;
483
484 bridge->dev = pdev;
485 bridge->capndx = cap_ptr;
486
487 bridge->driver = &ati_generic_bridge;
488
489
490 printk(KERN_INFO PFX "Detected Ati %s chipset\n",
491 devs[j].chipset_name);
492
493 /* Fill in the mode register */
494 pci_read_config_dword(pdev,
495 bridge->capndx+PCI_AGP_STATUS,
496 &bridge->mode);
497
498 pci_set_drvdata(pdev, bridge);
499 return agp_add_bridge(bridge);
500 }
501
502 static void __devexit agp_ati_remove(struct pci_dev *pdev)
503 {
504 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
505
506 agp_remove_bridge(bridge);
507 agp_put_bridge(bridge);
508 }
509
510 static struct pci_device_id agp_ati_pci_table[] = {
511 {
512 .class = (PCI_CLASS_BRIDGE_HOST << 8),
513 .class_mask = ~0,
514 .vendor = PCI_VENDOR_ID_ATI,
515 .device = PCI_ANY_ID,
516 .subvendor = PCI_ANY_ID,
517 .subdevice = PCI_ANY_ID,
518 },
519 { }
520 };
521
522 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
523
524 static struct pci_driver agp_ati_pci_driver = {
525 .name = "agpgart-ati",
526 .id_table = agp_ati_pci_table,
527 .probe = agp_ati_probe,
528 .remove = agp_ati_remove,
529 };
530
531 static int __init agp_ati_init(void)
532 {
533 if (agp_off)
534 return -EINVAL;
535 return pci_register_driver(&agp_ati_pci_driver);
536 }
537
538 static void __exit agp_ati_cleanup(void)
539 {
540 pci_unregister_driver(&agp_ati_pci_driver);
541 }
542
543 module_init(agp_ati_init);
544 module_exit(agp_ati_cleanup);
545
546 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
547 MODULE_LICENSE("GPL and additional rights");
548
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