2 * ATi AGPGART routines.
5 #include <linux/types.h>
6 #include <linux/module.h>
8 #include <linux/init.h>
9 #include <linux/string.h>
10 #include <linux/slab.h>
11 #include <linux/agp_backend.h>
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
27 static const struct aper_size_info_lvl2 ati_generic_sizes[7] =
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}
38 static struct gatt_mask ati_generic_masks[] =
40 { .mask = 1, .type = 0}
46 unsigned long __iomem *remapped;
49 static struct _ati_generic_private {
50 volatile u8 __iomem *registers;
51 struct ati_page_map **gatt_pages;
53 } ati_generic_private;
55 static int ati_create_page_map(struct ati_page_map *page_map)
59 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
60 if (page_map->real == NULL)
63 SetPageReserved(virt_to_page(page_map->real));
64 err = map_page_into_agp(virt_to_page(page_map->real));
65 page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
67 if (page_map->remapped == NULL || err) {
68 ClearPageReserved(virt_to_page(page_map->real));
69 free_page((unsigned long) page_map->real);
70 page_map->real = NULL;
76 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
77 writel(agp_bridge->scratch_page, page_map->remapped+i);
78 readl(page_map->remapped+i); /* PCI Posting. */
85 static void ati_free_page_map(struct ati_page_map *page_map)
87 unmap_page_from_agp(virt_to_page(page_map->real));
88 iounmap(page_map->remapped);
89 ClearPageReserved(virt_to_page(page_map->real));
90 free_page((unsigned long) page_map->real);
94 static void ati_free_gatt_pages(void)
97 struct ati_page_map **tables;
98 struct ati_page_map *entry;
100 tables = ati_generic_private.gatt_pages;
101 for (i = 0; i < ati_generic_private.num_tables; i++) {
104 if (entry->real != NULL)
105 ati_free_page_map(entry);
113 static int ati_create_gatt_pages(int nr_tables)
115 struct ati_page_map **tables;
116 struct ati_page_map *entry;
120 tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
124 for (i = 0; i < nr_tables; i++) {
125 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
131 retval = ati_create_page_map(entry);
135 ati_generic_private.num_tables = i;
136 ati_generic_private.gatt_pages = tables;
139 ati_free_gatt_pages();
144 static int is_r200(void)
146 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
147 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
148 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
149 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
154 static int ati_fetch_size(void)
158 struct aper_size_info_lvl2 *values;
161 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
163 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
165 temp = (temp & 0x0000000e);
166 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
167 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
168 if (temp == values[i].size_value) {
169 agp_bridge->previous_size =
170 agp_bridge->current_size = (void *) (values + i);
172 agp_bridge->aperture_size_idx = i;
173 return values[i].size;
180 static void ati_tlbflush(struct agp_memory * mem)
182 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
183 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */
186 static void ati_cleanup(void)
188 struct aper_size_info_lvl2 *previous_size;
191 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
193 /* Write back the previous size and disable gart translation */
195 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
196 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
197 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
199 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
200 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
201 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
203 iounmap((volatile u8 __iomem *)ati_generic_private.registers);
207 static int ati_configure(void)
211 /* Get the memory mapped registers */
212 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
213 temp = (temp & 0xfffff000);
214 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
217 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
219 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
221 /* address to map too */
223 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
224 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
225 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
227 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
228 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/
230 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
231 pci_read_config_dword(agp_bridge->dev, 4, &temp);
232 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
234 /* Write out the address of the gatt table */
235 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
236 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */
243 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
246 pci_set_power_state(dev, 3);
251 static int agp_ati_resume(struct pci_dev *dev)
253 pci_set_power_state(dev, 0);
254 pci_restore_state(dev);
256 return ati_configure();
261 *Since we don't need contiguous memory we just try
262 * to get the gatt table once
265 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
266 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
267 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
268 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
270 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
271 GET_PAGE_DIR_IDX(addr)]->remapped)
273 static int ati_insert_memory(struct agp_memory * mem,
274 off_t pg_start, int type)
276 int i, j, num_entries;
277 unsigned long __iomem *cur_gatt;
280 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
282 if (type != 0 || mem->type != 0)
285 if ((pg_start + mem->page_count) > num_entries)
289 while (j < (pg_start + mem->page_count)) {
290 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
291 cur_gatt = GET_GATT(addr);
292 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
297 if (mem->is_flushed == FALSE) {
299 global_cache_flush();
300 mem->is_flushed = TRUE;
303 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
304 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
305 cur_gatt = GET_GATT(addr);
306 writel(agp_bridge->driver->mask_memory(agp_bridge,
307 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
308 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
310 agp_bridge->driver->tlb_flush(mem);
314 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
318 unsigned long __iomem *cur_gatt;
321 if (type != 0 || mem->type != 0)
324 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
325 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
326 cur_gatt = GET_GATT(addr);
327 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
328 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
331 agp_bridge->driver->tlb_flush(mem);
335 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
337 struct aper_size_info_lvl2 *value;
338 struct ati_page_map page_dir;
343 struct aper_size_info_lvl2 *current_size;
345 value = A_SIZE_LVL2(agp_bridge->current_size);
346 retval = ati_create_page_map(&page_dir);
350 retval = ati_create_gatt_pages(value->num_entries / 1024);
352 ati_free_page_map(&page_dir);
356 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
357 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
358 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
360 /* Write out the size register */
361 current_size = A_SIZE_LVL2(agp_bridge->current_size);
364 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
365 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
367 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
368 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
370 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
371 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
373 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
374 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
378 * Get the address for the gart region.
379 * This is a bus address even on the alpha, b/c its
380 * used to program the agp master not the cpu
382 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
383 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
384 agp_bridge->gart_bus_addr = addr;
386 /* Calculate the agp offset */
387 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
388 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
389 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
390 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
396 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
398 struct ati_page_map page_dir;
400 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
401 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
403 ati_free_gatt_pages();
404 ati_free_page_map(&page_dir);
408 static const struct agp_bridge_driver ati_generic_bridge = {
409 .owner = THIS_MODULE,
410 .aperture_sizes = ati_generic_sizes,
411 .size_type = LVL2_APER_SIZE,
412 .num_aperture_sizes = 7,
413 .configure = ati_configure,
414 .fetch_size = ati_fetch_size,
415 .cleanup = ati_cleanup,
416 .tlb_flush = ati_tlbflush,
417 .mask_memory = agp_generic_mask_memory,
418 .masks = ati_generic_masks,
419 .agp_enable = agp_generic_enable,
420 .cache_flush = global_cache_flush,
421 .create_gatt_table = ati_create_gatt_table,
422 .free_gatt_table = ati_free_gatt_table,
423 .insert_memory = ati_insert_memory,
424 .remove_memory = ati_remove_memory,
425 .alloc_by_type = agp_generic_alloc_by_type,
426 .free_by_type = agp_generic_free_by_type,
427 .agp_alloc_page = agp_generic_alloc_page,
428 .agp_destroy_page = agp_generic_destroy_page,
429 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
433 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
436 .device_id = PCI_DEVICE_ID_ATI_RS100,
437 .chipset_name = "IGP320/M",
440 .device_id = PCI_DEVICE_ID_ATI_RS200,
441 .chipset_name = "IGP330/340/345/350/M",
444 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
445 .chipset_name = "IGP345M",
448 .device_id = PCI_DEVICE_ID_ATI_RS250,
449 .chipset_name = "IGP7000/M",
452 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
453 .chipset_name = "IGP9100/M",
456 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
457 .chipset_name = "IGP9100/M",
460 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
461 .chipset_name = "IGP9100/M",
464 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
465 .chipset_name = "IGP9100/M",
468 .device_id = PCI_DEVICE_ID_ATI_RS350_200,
469 .chipset_name = "IGP9100/M",
471 { }, /* dummy final entry, always present */
474 static int __devinit agp_ati_probe(struct pci_dev *pdev,
475 const struct pci_device_id *ent)
477 struct agp_device_ids *devs = ati_agp_device_ids;
478 struct agp_bridge_data *bridge;
482 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
486 /* probe for known chipsets */
487 for (j = 0; devs[j].chipset_name; j++) {
488 if (pdev->device == devs[j].device_id)
493 "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
497 bridge = agp_alloc_bridge();
502 bridge->capndx = cap_ptr;
504 bridge->driver = &ati_generic_bridge;
506 printk(KERN_INFO PFX "Detected Ati %s chipset\n",
507 devs[j].chipset_name);
509 /* Fill in the mode register */
510 pci_read_config_dword(pdev,
511 bridge->capndx+PCI_AGP_STATUS,
514 pci_set_drvdata(pdev, bridge);
515 return agp_add_bridge(bridge);
518 static void __devexit agp_ati_remove(struct pci_dev *pdev)
520 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
522 agp_remove_bridge(bridge);
523 agp_put_bridge(bridge);
526 static struct pci_device_id agp_ati_pci_table[] = {
528 .class = (PCI_CLASS_BRIDGE_HOST << 8),
530 .vendor = PCI_VENDOR_ID_ATI,
531 .device = PCI_ANY_ID,
532 .subvendor = PCI_ANY_ID,
533 .subdevice = PCI_ANY_ID,
538 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
540 static struct pci_driver agp_ati_pci_driver = {
541 .name = "agpgart-ati",
542 .id_table = agp_ati_pci_table,
543 .probe = agp_ati_probe,
544 .remove = agp_ati_remove,
546 .suspend = agp_ati_suspend,
547 .resume = agp_ati_resume,
551 static int __init agp_ati_init(void)
555 return pci_register_driver(&agp_ati_pci_driver);
558 static void __exit agp_ati_cleanup(void)
560 pci_unregister_driver(&agp_ati_pci_driver);
563 module_init(agp_ati_init);
564 module_exit(agp_ati_cleanup);
566 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
567 MODULE_LICENSE("GPL and additional rights");