?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 4.4.145
[linux/fpc-iii.git] / drivers / char / agp / amd-k7-agp.c
blob3661a51e93e2d37db31d1aa4997b0bdfeb149a05
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_BAR 1
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 int i;
130
131 value = A_SIZE_LVL2(agp_bridge->current_size);
132 retval = amd_create_page_map(&page_dir);
133 if (retval != 0)
134 return retval;
135
136 retval = amd_create_gatt_pages(value->num_entries / 1024);
137 if (retval != 0) {
138 amd_free_page_map(&page_dir);
139 return retval;
140 }
141
142 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
143 agp_bridge->gatt_table = (u32 __iomem *)page_dir.remapped;
144 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
145
146 /* Get the address for the gart region.
147 * This is a bus address even on the alpha, b/c its
148 * used to program the agp master not the cpu
149 */
150
151 addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
152 agp_bridge->gart_bus_addr = addr;
153
154 /* Calculate the agp offset */
155 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
156 writel(virt_to_phys(amd_irongate_private.gatt_pages[i]->real) | 1,
157 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
158 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
159 }
160
161 for (i = 0; i < value->num_entries; i++) {
162 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
163 cur_gatt = GET_GATT(addr);
164 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
165 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
166 }
167
168 return 0;
169 }
170
171 static int amd_free_gatt_table(struct agp_bridge_data *bridge)
172 {
173 struct amd_page_map page_dir;
174
175 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
176 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
177
178 amd_free_gatt_pages();
179 amd_free_page_map(&page_dir);
180 return 0;
181 }
182
183 static int amd_irongate_fetch_size(void)
184 {
185 int i;
186 u32 temp;
187 struct aper_size_info_lvl2 *values;
188
189 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
190 temp = (temp & 0x0000000e);
191 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
192 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
193 if (temp == values[i].size_value) {
194 agp_bridge->previous_size =
195 agp_bridge->current_size = (void *) (values + i);
196
197 agp_bridge->aperture_size_idx = i;
198 return values[i].size;
199 }
200 }
201
202 return 0;
203 }
204
205 static int amd_irongate_configure(void)
206 {
207 struct aper_size_info_lvl2 *current_size;
208 phys_addr_t reg;
209 u32 temp;
210 u16 enable_reg;
211
212 current_size = A_SIZE_LVL2(agp_bridge->current_size);
213
214 if (!amd_irongate_private.registers) {
215 /* Get the memory mapped registers */
216 reg = pci_resource_start(agp_bridge->dev, AMD_MMBASE_BAR);
217 amd_irongate_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
218 if (!amd_irongate_private.registers)
219 return -ENOMEM;
220 }
221
222 /* Write out the address of the gatt table */
223 writel(agp_bridge->gatt_bus_addr, amd_irongate_private.registers+AMD_ATTBASE);
224 readl(amd_irongate_private.registers+AMD_ATTBASE); /* PCI Posting. */
225
226 /* Write the Sync register */
227 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL, 0x80);
228
229 /* Set indexing mode */
230 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL2, 0x00);
231
232 /* Write the enable register */
233 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE);
234 enable_reg = (enable_reg | 0x0004);
235 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE);
236 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */
237
238 /* Write out the size register */
239 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
240 temp = (((temp & ~(0x0000000e)) | current_size->size_value) | 1);
241 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp);
242
243 /* Flush the tlb */
244 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH);
245 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting.*/
246 return 0;
247 }
248
249 static void amd_irongate_cleanup(void)
250 {
251 struct aper_size_info_lvl2 *previous_size;
252 u32 temp;
253 u16 enable_reg;
254
255 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
256
257 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE);
258 enable_reg = (enable_reg & ~(0x0004));
259 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE);
260 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */
261
262 /* Write back the previous size and disable gart translation */
263 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
264 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
265 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp);
266 iounmap((void __iomem *) amd_irongate_private.registers);
267 }
268
269 /*
270 * This routine could be implemented by taking the addresses
271 * written to the GATT, and flushing them individually. However
272 * currently it just flushes the whole table. Which is probably
273 * more efficient, since agp_memory blocks can be a large number of
274 * entries.
275 */
276
277 static void amd_irongate_tlbflush(struct agp_memory *temp)
278 {
279 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH);
280 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting. */
281 }
282
283 static int amd_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
284 {
285 int i, j, num_entries;
286 unsigned long __iomem *cur_gatt;
287 unsigned long addr;
288
289 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
290
291 if (type != mem->type ||
292 agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type))
293 return -EINVAL;
294
295 if ((pg_start + mem->page_count) > num_entries)
296 return -EINVAL;
297
298 j = pg_start;
299 while (j < (pg_start + mem->page_count)) {
300 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
301 cur_gatt = GET_GATT(addr);
302 if (!PGE_EMPTY(agp_bridge, readl(cur_gatt+GET_GATT_OFF(addr))))
303 return -EBUSY;
304 j++;
305 }
306
307 if (!mem->is_flushed) {
308 global_cache_flush();
309 mem->is_flushed = true;
310 }
311
312 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
313 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
314 cur_gatt = GET_GATT(addr);
315 writel(agp_generic_mask_memory(agp_bridge,
316 page_to_phys(mem->pages[i]),
317 mem->type),
318 cur_gatt+GET_GATT_OFF(addr));
319 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
320 }
321 amd_irongate_tlbflush(mem);
322 return 0;
323 }
324
325 static int amd_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
326 {
327 int i;
328 unsigned long __iomem *cur_gatt;
329 unsigned long addr;
330
331 if (type != mem->type ||
332 agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type))
333 return -EINVAL;
334
335 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
336 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
337 cur_gatt = GET_GATT(addr);
338 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
339 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
340 }
341
342 amd_irongate_tlbflush(mem);
343 return 0;
344 }
345
346 static const struct aper_size_info_lvl2 amd_irongate_sizes[7] =
347 {
348 {2048, 524288, 0x0000000c},
349 {1024, 262144, 0x0000000a},
350 {512, 131072, 0x00000008},
351 {256, 65536, 0x00000006},
352 {128, 32768, 0x00000004},
353 {64, 16384, 0x00000002},
354 {32, 8192, 0x00000000}
355 };
356
357 static const struct gatt_mask amd_irongate_masks[] =
358 {
359 {.mask = 1, .type = 0}
360 };
361
362 static const struct agp_bridge_driver amd_irongate_driver = {
363 .owner = THIS_MODULE,
364 .aperture_sizes = amd_irongate_sizes,
365 .size_type = LVL2_APER_SIZE,
366 .num_aperture_sizes = 7,
367 .needs_scratch_page = true,
368 .configure = amd_irongate_configure,
369 .fetch_size = amd_irongate_fetch_size,
370 .cleanup = amd_irongate_cleanup,
371 .tlb_flush = amd_irongate_tlbflush,
372 .mask_memory = agp_generic_mask_memory,
373 .masks = amd_irongate_masks,
374 .agp_enable = agp_generic_enable,
375 .cache_flush = global_cache_flush,
376 .create_gatt_table = amd_create_gatt_table,
377 .free_gatt_table = amd_free_gatt_table,
378 .insert_memory = amd_insert_memory,
379 .remove_memory = amd_remove_memory,
380 .alloc_by_type = agp_generic_alloc_by_type,
381 .free_by_type = agp_generic_free_by_type,
382 .agp_alloc_page = agp_generic_alloc_page,
383 .agp_alloc_pages = agp_generic_alloc_pages,
384 .agp_destroy_page = agp_generic_destroy_page,
385 .agp_destroy_pages = agp_generic_destroy_pages,
386 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
387 };
388
389 static struct agp_device_ids amd_agp_device_ids[] =
390 {
391 {
392 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_7006,
393 .chipset_name = "Irongate",
394 },
395 {
396 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700E,
397 .chipset_name = "761",
398 },
399 {
400 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700C,
401 .chipset_name = "760MP",
402 },
403 { }, /* dummy final entry, always present */
404 };
405
406 static int agp_amdk7_probe(struct pci_dev *pdev,
407 const struct pci_device_id *ent)
408 {
409 struct agp_bridge_data *bridge;
410 u8 cap_ptr;
411 int j;
412
413 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
414 if (!cap_ptr)
415 return -ENODEV;
416
417 j = ent - agp_amdk7_pci_table;
418 dev_info(&pdev->dev, "AMD %s chipset\n",
419 amd_agp_device_ids[j].chipset_name);
420
421 bridge = agp_alloc_bridge();
422 if (!bridge)
423 return -ENOMEM;
424
425 bridge->driver = &amd_irongate_driver;
426 bridge->dev_private_data = &amd_irongate_private,
427 bridge->dev = pdev;
428 bridge->capndx = cap_ptr;
429
430 /* 751 Errata (22564_B-1.PDF)
431 erratum 20: strobe glitch with Nvidia NV10 GeForce cards.
432 system controller may experience noise due to strong drive strengths
433 */
434 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_7006) {
435 struct pci_dev *gfxcard=NULL;
436
437 cap_ptr = 0;
438 while (!cap_ptr) {
439 gfxcard = pci_get_class(PCI_CLASS_DISPLAY_VGA<<8, gfxcard);
440 if (!gfxcard) {
441 dev_info(&pdev->dev, "no AGP VGA controller\n");
442 return -ENODEV;
443 }
444 cap_ptr = pci_find_capability(gfxcard, PCI_CAP_ID_AGP);
445 }
446
447 /* With so many variants of NVidia cards, it's simpler just
448 to blacklist them all, and then whitelist them as needed
449 (if necessary at all). */
450 if (gfxcard->vendor == PCI_VENDOR_ID_NVIDIA) {
451 agp_bridge->flags |= AGP_ERRATA_1X;
452 dev_info(&pdev->dev, "AMD 751 chipset with NVidia GeForce; forcing 1X due to errata\n");
453 }
454 pci_dev_put(gfxcard);
455 }
456
457 /* 761 Errata (23613_F.pdf)
458 * Revisions B0/B1 were a disaster.
459 * erratum 44: SYSCLK/AGPCLK skew causes 2X failures -- Force mode to 1X
460 * erratum 45: Timing problem prevents fast writes -- Disable fast write.
461 * erratum 46: Setup violation on AGP SBA pins - Disable side band addressing.
462 * With this lot disabled, we should prevent lockups. */
463 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_700E) {
464 if (pdev->revision == 0x10 || pdev->revision == 0x11) {
465 agp_bridge->flags = AGP_ERRATA_FASTWRITES;
466 agp_bridge->flags |= AGP_ERRATA_SBA;
467 agp_bridge->flags |= AGP_ERRATA_1X;
468 dev_info(&pdev->dev, "AMD 761 chipset with errata; disabling AGP fast writes & SBA and forcing to 1X\n");
469 }
470 }
471
472 /* Fill in the mode register */
473 pci_read_config_dword(pdev,
474 bridge->capndx+PCI_AGP_STATUS,
475 &bridge->mode);
476
477 pci_set_drvdata(pdev, bridge);
478 return agp_add_bridge(bridge);
479 }
480
481 static void agp_amdk7_remove(struct pci_dev *pdev)
482 {
483 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
484
485 agp_remove_bridge(bridge);
486 agp_put_bridge(bridge);
487 }
488
489 #ifdef CONFIG_PM
490
491 static int agp_amdk7_suspend(struct pci_dev *pdev, pm_message_t state)
492 {
493 pci_save_state(pdev);
494 pci_set_power_state(pdev, pci_choose_state(pdev, state));
495
496 return 0;
497 }
498
499 static int agp_amdk7_resume(struct pci_dev *pdev)
500 {
501 pci_set_power_state(pdev, PCI_D0);
502 pci_restore_state(pdev);
503
504 return amd_irongate_driver.configure();
505 }
506
507 #endif /* CONFIG_PM */
508
509 /* must be the same order as name table above */
510 static struct pci_device_id agp_amdk7_pci_table[] = {
511 {
512 .class = (PCI_CLASS_BRIDGE_HOST << 8),
513 .class_mask = ~0,
514 .vendor = PCI_VENDOR_ID_AMD,
515 .device = PCI_DEVICE_ID_AMD_FE_GATE_7006,
516 .subvendor = PCI_ANY_ID,
517 .subdevice = PCI_ANY_ID,
518 },
519 {
520 .class = (PCI_CLASS_BRIDGE_HOST << 8),
521 .class_mask = ~0,
522 .vendor = PCI_VENDOR_ID_AMD,
523 .device = PCI_DEVICE_ID_AMD_FE_GATE_700E,
524 .subvendor = PCI_ANY_ID,
525 .subdevice = PCI_ANY_ID,
526 },
527 {
528 .class = (PCI_CLASS_BRIDGE_HOST << 8),
529 .class_mask = ~0,
530 .vendor = PCI_VENDOR_ID_AMD,
531 .device = PCI_DEVICE_ID_AMD_FE_GATE_700C,
532 .subvendor = PCI_ANY_ID,
533 .subdevice = PCI_ANY_ID,
534 },
535 { }
536 };
537
538 MODULE_DEVICE_TABLE(pci, agp_amdk7_pci_table);
539
540 static struct pci_driver agp_amdk7_pci_driver = {
541 .name = "agpgart-amdk7",
542 .id_table = agp_amdk7_pci_table,
543 .probe = agp_amdk7_probe,
544 .remove = agp_amdk7_remove,
545 #ifdef CONFIG_PM
546 .suspend = agp_amdk7_suspend,
547 .resume = agp_amdk7_resume,
548 #endif
549 };
550
551 static int __init agp_amdk7_init(void)
552 {
553 if (agp_off)
554 return -EINVAL;
555 return pci_register_driver(&agp_amdk7_pci_driver);
556 }
557
558 static void __exit agp_amdk7_cleanup(void)
559 {
560 pci_unregister_driver(&agp_amdk7_pci_driver);
561 }
562
563 module_init(agp_amdk7_init);
564 module_exit(agp_amdk7_cleanup);
565
566 MODULE_LICENSE("GPL and additional rights");
Linux with added FPC-III support