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audit: complex interfield comparison helper
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / agp / amd-k7-agp.c
blobf7e88787af970947f236b78f68c6ade8c02fab46
1 /*
2 * AMD K7 AGPGART routines.
3 */
4
5 #include <linux/module.h>
6 #include <linux/pci.h>
7 #include <linux/init.h>
8 #include <linux/agp_backend.h>
9 #include <linux/page-flags.h>
10 #include <linux/mm.h>
11 #include <linux/slab.h>
12 #include "agp.h"
13
14 #define AMD_MMBASE 0x14
15 #define AMD_APSIZE 0xac
16 #define AMD_MODECNTL 0xb0
17 #define AMD_MODECNTL2 0xb2
18 #define AMD_GARTENABLE 0x02 /* In mmio region (16-bit register) */
19 #define AMD_ATTBASE 0x04 /* In mmio region (32-bit register) */
20 #define AMD_TLBFLUSH 0x0c /* In mmio region (32-bit register) */
21 #define AMD_CACHEENTRY 0x10 /* In mmio region (32-bit register) */
22
23 static struct pci_device_id agp_amdk7_pci_table[];
24
25 struct amd_page_map {
26 unsigned long *real;
27 unsigned long __iomem *remapped;
28 };
29
30 static struct _amd_irongate_private {
31 volatile u8 __iomem *registers;
32 struct amd_page_map **gatt_pages;
33 int num_tables;
34 } amd_irongate_private;
35
36 static int amd_create_page_map(struct amd_page_map *page_map)
37 {
38 int i;
39
40 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
41 if (page_map->real == NULL)
42 return -ENOMEM;
43
44 set_memory_uc((unsigned long)page_map->real, 1);
45 page_map->remapped = page_map->real;
46
47 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
48 writel(agp_bridge->scratch_page, page_map->remapped+i);
49 readl(page_map->remapped+i); /* PCI Posting. */
50 }
51
52 return 0;
53 }
54
55 static void amd_free_page_map(struct amd_page_map *page_map)
56 {
57 set_memory_wb((unsigned long)page_map->real, 1);
58 free_page((unsigned long) page_map->real);
59 }
60
61 static void amd_free_gatt_pages(void)
62 {
63 int i;
64 struct amd_page_map **tables;
65 struct amd_page_map *entry;
66
67 tables = amd_irongate_private.gatt_pages;
68 for (i = 0; i < amd_irongate_private.num_tables; i++) {
69 entry = tables[i];
70 if (entry != NULL) {
71 if (entry->real != NULL)
72 amd_free_page_map(entry);
73 kfree(entry);
74 }
75 }
76 kfree(tables);
77 amd_irongate_private.gatt_pages = NULL;
78 }
79
80 static int amd_create_gatt_pages(int nr_tables)
81 {
82 struct amd_page_map **tables;
83 struct amd_page_map *entry;
84 int retval = 0;
85 int i;
86
87 tables = kzalloc((nr_tables + 1) * sizeof(struct amd_page_map *),GFP_KERNEL);
88 if (tables == NULL)
89 return -ENOMEM;
90
91 for (i = 0; i < nr_tables; i++) {
92 entry = kzalloc(sizeof(struct amd_page_map), GFP_KERNEL);
93 tables[i] = entry;
94 if (entry == NULL) {
95 retval = -ENOMEM;
96 break;
97 }
98 retval = amd_create_page_map(entry);
99 if (retval != 0)
100 break;
101 }
102 amd_irongate_private.num_tables = i;
103 amd_irongate_private.gatt_pages = tables;
104
105 if (retval != 0)
106 amd_free_gatt_pages();
107
108 return retval;
109 }
110
111 /* Since we don't need contiguous memory we just try
112 * to get the gatt table once
113 */
114
115 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
116 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
117 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
118 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
119 #define GET_GATT(addr) (amd_irongate_private.gatt_pages[\
120 GET_PAGE_DIR_IDX(addr)]->remapped)
121
122 static int amd_create_gatt_table(struct agp_bridge_data *bridge)
123 {
124 struct aper_size_info_lvl2 *value;
125 struct amd_page_map page_dir;
126 unsigned long __iomem *cur_gatt;
127 unsigned long addr;
128 int retval;
129 u32 temp;
130 int i;
131
132 value = A_SIZE_LVL2(agp_bridge->current_size);
133 retval = amd_create_page_map(&page_dir);
134 if (retval != 0)
135 return retval;
136
137 retval = amd_create_gatt_pages(value->num_entries / 1024);
138 if (retval != 0) {
139 amd_free_page_map(&page_dir);
140 return retval;
141 }
142
143 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
144 agp_bridge->gatt_table = (u32 __iomem *)page_dir.remapped;
145 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
146
147 /* Get the address for the gart region.
148 * This is a bus address even on the alpha, b/c its
149 * used to program the agp master not the cpu
150 */
151
152 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
153 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
154 agp_bridge->gart_bus_addr = addr;
155
156 /* Calculate the agp offset */
157 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
158 writel(virt_to_phys(amd_irongate_private.gatt_pages[i]->real) | 1,
159 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
160 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
161 }
162
163 for (i = 0; i < value->num_entries; i++) {
164 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
165 cur_gatt = GET_GATT(addr);
166 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
167 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
168 }
169
170 return 0;
171 }
172
173 static int amd_free_gatt_table(struct agp_bridge_data *bridge)
174 {
175 struct amd_page_map page_dir;
176
177 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
178 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
179
180 amd_free_gatt_pages();
181 amd_free_page_map(&page_dir);
182 return 0;
183 }
184
185 static int amd_irongate_fetch_size(void)
186 {
187 int i;
188 u32 temp;
189 struct aper_size_info_lvl2 *values;
190
191 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
192 temp = (temp & 0x0000000e);
193 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
194 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
195 if (temp == values[i].size_value) {
196 agp_bridge->previous_size =
197 agp_bridge->current_size = (void *) (values + i);
198
199 agp_bridge->aperture_size_idx = i;
200 return values[i].size;
201 }
202 }
203
204 return 0;
205 }
206
207 static int amd_irongate_configure(void)
208 {
209 struct aper_size_info_lvl2 *current_size;
210 u32 temp;
211 u16 enable_reg;
212
213 current_size = A_SIZE_LVL2(agp_bridge->current_size);
214
215 if (!amd_irongate_private.registers) {
216 /* Get the memory mapped registers */
217 pci_read_config_dword(agp_bridge->dev, AMD_MMBASE, &temp);
218 temp = (temp & PCI_BASE_ADDRESS_MEM_MASK);
219 amd_irongate_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
220 if (!amd_irongate_private.registers)
221 return -ENOMEM;
222 }
223
224 /* Write out the address of the gatt table */
225 writel(agp_bridge->gatt_bus_addr, amd_irongate_private.registers+AMD_ATTBASE);
226 readl(amd_irongate_private.registers+AMD_ATTBASE); /* PCI Posting. */
227
228 /* Write the Sync register */
229 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL, 0x80);
230
231 /* Set indexing mode */
232 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL2, 0x00);
233
234 /* Write the enable register */
235 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE);
236 enable_reg = (enable_reg | 0x0004);
237 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE);
238 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */
239
240 /* Write out the size register */
241 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
242 temp = (((temp & ~(0x0000000e)) | current_size->size_value) | 1);
243 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp);
244
245 /* Flush the tlb */
246 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH);
247 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting.*/
248 return 0;
249 }
250
251 static void amd_irongate_cleanup(void)
252 {
253 struct aper_size_info_lvl2 *previous_size;
254 u32 temp;
255 u16 enable_reg;
256
257 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
258
259 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE);
260 enable_reg = (enable_reg & ~(0x0004));
261 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE);
262 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */
263
264 /* Write back the previous size and disable gart translation */
265 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
266 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
267 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp);
268 iounmap((void __iomem *) amd_irongate_private.registers);
269 }
270
271 /*
272 * This routine could be implemented by taking the addresses
273 * written to the GATT, and flushing them individually. However
274 * currently it just flushes the whole table. Which is probably
275 * more efficient, since agp_memory blocks can be a large number of
276 * entries.
277 */
278
279 static void amd_irongate_tlbflush(struct agp_memory *temp)
280 {
281 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH);
282 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting. */
283 }
284
285 static int amd_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
286 {
287 int i, j, num_entries;
288 unsigned long __iomem *cur_gatt;
289 unsigned long addr;
290
291 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
292
293 if (type != mem->type ||
294 agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type))
295 return -EINVAL;
296
297 if ((pg_start + mem->page_count) > num_entries)
298 return -EINVAL;
299
300 j = pg_start;
301 while (j < (pg_start + mem->page_count)) {
302 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
303 cur_gatt = GET_GATT(addr);
304 if (!PGE_EMPTY(agp_bridge, readl(cur_gatt+GET_GATT_OFF(addr))))
305 return -EBUSY;
306 j++;
307 }
308
309 if (!mem->is_flushed) {
310 global_cache_flush();
311 mem->is_flushed = true;
312 }
313
314 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
315 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
316 cur_gatt = GET_GATT(addr);
317 writel(agp_generic_mask_memory(agp_bridge,
318 page_to_phys(mem->pages[i]),
319 mem->type),
320 cur_gatt+GET_GATT_OFF(addr));
321 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
322 }
323 amd_irongate_tlbflush(mem);
324 return 0;
325 }
326
327 static int amd_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
328 {
329 int i;
330 unsigned long __iomem *cur_gatt;
331 unsigned long addr;
332
333 if (type != mem->type ||
334 agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type))
335 return -EINVAL;
336
337 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
338 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
339 cur_gatt = GET_GATT(addr);
340 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
341 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
342 }
343
344 amd_irongate_tlbflush(mem);
345 return 0;
346 }
347
348 static const struct aper_size_info_lvl2 amd_irongate_sizes[7] =
349 {
350 {2048, 524288, 0x0000000c},
351 {1024, 262144, 0x0000000a},
352 {512, 131072, 0x00000008},
353 {256, 65536, 0x00000006},
354 {128, 32768, 0x00000004},
355 {64, 16384, 0x00000002},
356 {32, 8192, 0x00000000}
357 };
358
359 static const struct gatt_mask amd_irongate_masks[] =
360 {
361 {.mask = 1, .type = 0}
362 };
363
364 static const struct agp_bridge_driver amd_irongate_driver = {
365 .owner = THIS_MODULE,
366 .aperture_sizes = amd_irongate_sizes,
367 .size_type = LVL2_APER_SIZE,
368 .num_aperture_sizes = 7,
369 .needs_scratch_page = true,
370 .configure = amd_irongate_configure,
371 .fetch_size = amd_irongate_fetch_size,
372 .cleanup = amd_irongate_cleanup,
373 .tlb_flush = amd_irongate_tlbflush,
374 .mask_memory = agp_generic_mask_memory,
375 .masks = amd_irongate_masks,
376 .agp_enable = agp_generic_enable,
377 .cache_flush = global_cache_flush,
378 .create_gatt_table = amd_create_gatt_table,
379 .free_gatt_table = amd_free_gatt_table,
380 .insert_memory = amd_insert_memory,
381 .remove_memory = amd_remove_memory,
382 .alloc_by_type = agp_generic_alloc_by_type,
383 .free_by_type = agp_generic_free_by_type,
384 .agp_alloc_page = agp_generic_alloc_page,
385 .agp_alloc_pages = agp_generic_alloc_pages,
386 .agp_destroy_page = agp_generic_destroy_page,
387 .agp_destroy_pages = agp_generic_destroy_pages,
388 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
389 };
390
391 static struct agp_device_ids amd_agp_device_ids[] __devinitdata =
392 {
393 {
394 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_7006,
395 .chipset_name = "Irongate",
396 },
397 {
398 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700E,
399 .chipset_name = "761",
400 },
401 {
402 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700C,
403 .chipset_name = "760MP",
404 },
405 { }, /* dummy final entry, always present */
406 };
407
408 static int __devinit agp_amdk7_probe(struct pci_dev *pdev,
409 const struct pci_device_id *ent)
410 {
411 struct agp_bridge_data *bridge;
412 u8 cap_ptr;
413 int j;
414
415 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
416 if (!cap_ptr)
417 return -ENODEV;
418
419 j = ent - agp_amdk7_pci_table;
420 dev_info(&pdev->dev, "AMD %s chipset\n",
421 amd_agp_device_ids[j].chipset_name);
422
423 bridge = agp_alloc_bridge();
424 if (!bridge)
425 return -ENOMEM;
426
427 bridge->driver = &amd_irongate_driver;
428 bridge->dev_private_data = &amd_irongate_private,
429 bridge->dev = pdev;
430 bridge->capndx = cap_ptr;
431
432 /* 751 Errata (22564_B-1.PDF)
433 erratum 20: strobe glitch with Nvidia NV10 GeForce cards.
434 system controller may experience noise due to strong drive strengths
435 */
436 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_7006) {
437 struct pci_dev *gfxcard=NULL;
438
439 cap_ptr = 0;
440 while (!cap_ptr) {
441 gfxcard = pci_get_class(PCI_CLASS_DISPLAY_VGA<<8, gfxcard);
442 if (!gfxcard) {
443 dev_info(&pdev->dev, "no AGP VGA controller\n");
444 return -ENODEV;
445 }
446 cap_ptr = pci_find_capability(gfxcard, PCI_CAP_ID_AGP);
447 }
448
449 /* With so many variants of NVidia cards, it's simpler just
450 to blacklist them all, and then whitelist them as needed
451 (if necessary at all). */
452 if (gfxcard->vendor == PCI_VENDOR_ID_NVIDIA) {
453 agp_bridge->flags |= AGP_ERRATA_1X;
454 dev_info(&pdev->dev, "AMD 751 chipset with NVidia GeForce; forcing 1X due to errata\n");
455 }
456 pci_dev_put(gfxcard);
457 }
458
459 /* 761 Errata (23613_F.pdf)
460 * Revisions B0/B1 were a disaster.
461 * erratum 44: SYSCLK/AGPCLK skew causes 2X failures -- Force mode to 1X
462 * erratum 45: Timing problem prevents fast writes -- Disable fast write.
463 * erratum 46: Setup violation on AGP SBA pins - Disable side band addressing.
464 * With this lot disabled, we should prevent lockups. */
465 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_700E) {
466 if (pdev->revision == 0x10 || pdev->revision == 0x11) {
467 agp_bridge->flags = AGP_ERRATA_FASTWRITES;
468 agp_bridge->flags |= AGP_ERRATA_SBA;
469 agp_bridge->flags |= AGP_ERRATA_1X;
470 dev_info(&pdev->dev, "AMD 761 chipset with errata; disabling AGP fast writes & SBA and forcing to 1X\n");
471 }
472 }
473
474 /* Fill in the mode register */
475 pci_read_config_dword(pdev,
476 bridge->capndx+PCI_AGP_STATUS,
477 &bridge->mode);
478
479 pci_set_drvdata(pdev, bridge);
480 return agp_add_bridge(bridge);
481 }
482
483 static void __devexit agp_amdk7_remove(struct pci_dev *pdev)
484 {
485 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
486
487 agp_remove_bridge(bridge);
488 agp_put_bridge(bridge);
489 }
490
491 #ifdef CONFIG_PM
492
493 static int agp_amdk7_suspend(struct pci_dev *pdev, pm_message_t state)
494 {
495 pci_save_state(pdev);
496 pci_set_power_state(pdev, pci_choose_state(pdev, state));
497
498 return 0;
499 }
500
501 static int agp_amdk7_resume(struct pci_dev *pdev)
502 {
503 pci_set_power_state(pdev, PCI_D0);
504 pci_restore_state(pdev);
505
506 return amd_irongate_driver.configure();
507 }
508
509 #endif /* CONFIG_PM */
510
511 /* must be the same order as name table above */
512 static struct pci_device_id agp_amdk7_pci_table[] = {
513 {
514 .class = (PCI_CLASS_BRIDGE_HOST << 8),
515 .class_mask = ~0,
516 .vendor = PCI_VENDOR_ID_AMD,
517 .device = PCI_DEVICE_ID_AMD_FE_GATE_7006,
518 .subvendor = PCI_ANY_ID,
519 .subdevice = PCI_ANY_ID,
520 },
521 {
522 .class = (PCI_CLASS_BRIDGE_HOST << 8),
523 .class_mask = ~0,
524 .vendor = PCI_VENDOR_ID_AMD,
525 .device = PCI_DEVICE_ID_AMD_FE_GATE_700E,
526 .subvendor = PCI_ANY_ID,
527 .subdevice = PCI_ANY_ID,
528 },
529 {
530 .class = (PCI_CLASS_BRIDGE_HOST << 8),
531 .class_mask = ~0,
532 .vendor = PCI_VENDOR_ID_AMD,
533 .device = PCI_DEVICE_ID_AMD_FE_GATE_700C,
534 .subvendor = PCI_ANY_ID,
535 .subdevice = PCI_ANY_ID,
536 },
537 { }
538 };
539
540 MODULE_DEVICE_TABLE(pci, agp_amdk7_pci_table);
541
542 static struct pci_driver agp_amdk7_pci_driver = {
543 .name = "agpgart-amdk7",
544 .id_table = agp_amdk7_pci_table,
545 .probe = agp_amdk7_probe,
546 .remove = agp_amdk7_remove,
547 #ifdef CONFIG_PM
548 .suspend = agp_amdk7_suspend,
549 .resume = agp_amdk7_resume,
550 #endif
551 };
552
553 static int __init agp_amdk7_init(void)
554 {
555 if (agp_off)
556 return -EINVAL;
557 return pci_register_driver(&agp_amdk7_pci_driver);
558 }
559
560 static void __exit agp_amdk7_cleanup(void)
561 {
562 pci_unregister_driver(&agp_amdk7_pci_driver);
563 }
564
565 module_init(agp_amdk7_init);
566 module_exit(agp_amdk7_cleanup);
567
568 MODULE_LICENSE("GPL and additional rights");
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