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>
13 #include <asm/set_memory.h>
16 #define ATI_GART_MMBASE_BAR 1
17 #define ATI_RS100_APSIZE 0xac
18 #define ATI_RS100_IG_AGPMODE 0xb0
19 #define ATI_RS300_APSIZE 0xf8
20 #define ATI_RS300_IG_AGPMODE 0xfc
21 #define ATI_GART_FEATURE_ID 0x00
22 #define ATI_GART_BASE 0x04
23 #define ATI_GART_CACHE_SZBASE 0x08
24 #define ATI_GART_CACHE_CNTRL 0x0c
25 #define ATI_GART_CACHE_ENTRY_CNTRL 0x10
28 static const struct aper_size_info_lvl2 ati_generic_sizes[7] =
30 {2048, 524288, 0x0000000c},
31 {1024, 262144, 0x0000000a},
32 {512, 131072, 0x00000008},
33 {256, 65536, 0x00000006},
34 {128, 32768, 0x00000004},
35 {64, 16384, 0x00000002},
36 {32, 8192, 0x00000000}
39 static struct gatt_mask ati_generic_masks[] =
41 { .mask = 1, .type = 0}
47 unsigned long __iomem *remapped;
50 static struct _ati_generic_private {
51 volatile u8 __iomem *registers;
52 struct ati_page_map **gatt_pages;
54 } ati_generic_private;
56 static int ati_create_page_map(struct ati_page_map *page_map)
60 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
61 if (page_map->real == NULL)
64 set_memory_uc((unsigned long)page_map->real, 1);
65 err = map_page_into_agp(virt_to_page(page_map->real));
66 page_map->remapped = page_map->real;
68 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
69 writel(agp_bridge->scratch_page, page_map->remapped+i);
70 readl(page_map->remapped+i); /* PCI Posting. */
77 static void ati_free_page_map(struct ati_page_map *page_map)
79 unmap_page_from_agp(virt_to_page(page_map->real));
80 set_memory_wb((unsigned long)page_map->real, 1);
81 free_page((unsigned long) page_map->real);
85 static void ati_free_gatt_pages(void)
88 struct ati_page_map **tables;
89 struct ati_page_map *entry;
91 tables = ati_generic_private.gatt_pages;
92 for (i = 0; i < ati_generic_private.num_tables; i++) {
95 if (entry->real != NULL)
96 ati_free_page_map(entry);
104 static int ati_create_gatt_pages(int nr_tables)
106 struct ati_page_map **tables;
107 struct ati_page_map *entry;
111 tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
115 for (i = 0; i < nr_tables; i++) {
116 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
122 retval = ati_create_page_map(entry);
126 ati_generic_private.num_tables = i;
127 ati_generic_private.gatt_pages = tables;
130 ati_free_gatt_pages();
135 static int is_r200(void)
137 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
138 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
139 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
140 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
145 static int ati_fetch_size(void)
149 struct aper_size_info_lvl2 *values;
152 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
154 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
156 temp = (temp & 0x0000000e);
157 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
158 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
159 if (temp == values[i].size_value) {
160 agp_bridge->previous_size =
161 agp_bridge->current_size = (void *) (values + i);
163 agp_bridge->aperture_size_idx = i;
164 return values[i].size;
171 static void ati_tlbflush(struct agp_memory * mem)
173 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
174 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */
177 static void ati_cleanup(void)
179 struct aper_size_info_lvl2 *previous_size;
182 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
184 /* Write back the previous size and disable gart translation */
186 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
187 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
188 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
190 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
191 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
192 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
194 iounmap((volatile u8 __iomem *)ati_generic_private.registers);
198 static int ati_configure(void)
203 /* Get the memory mapped registers */
204 reg = pci_resource_start(agp_bridge->dev, ATI_GART_MMBASE_BAR);
205 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
207 if (!ati_generic_private.registers)
211 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
213 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
215 /* address to map to */
217 agp_bridge.gart_bus_addr = pci_bus_address(agp_bridge.dev,
219 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
221 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
222 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/
224 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
225 pci_read_config_dword(agp_bridge->dev, PCI_COMMAND, &temp);
226 pci_write_config_dword(agp_bridge->dev, PCI_COMMAND, temp | (1<<14));
228 /* Write out the address of the gatt table */
229 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
230 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */
237 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
240 pci_set_power_state(dev, PCI_D3hot);
245 static int agp_ati_resume(struct pci_dev *dev)
247 pci_set_power_state(dev, PCI_D0);
248 pci_restore_state(dev);
250 return ati_configure();
255 *Since we don't need contiguous memory we just try
256 * to get the gatt table once
259 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
260 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
261 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
262 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
264 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
265 GET_PAGE_DIR_IDX(addr)]->remapped)
267 static int ati_insert_memory(struct agp_memory * mem,
268 off_t pg_start, int type)
270 int i, j, num_entries;
271 unsigned long __iomem *cur_gatt;
275 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
277 mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
278 if (mask_type != 0 || type != mem->type)
281 if (mem->page_count == 0)
284 if ((pg_start + mem->page_count) > num_entries)
288 while (j < (pg_start + mem->page_count)) {
289 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
290 cur_gatt = GET_GATT(addr);
291 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
296 if (!mem->is_flushed) {
298 global_cache_flush();
299 mem->is_flushed = true;
302 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
303 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
304 cur_gatt = GET_GATT(addr);
305 writel(agp_bridge->driver->mask_memory(agp_bridge,
306 page_to_phys(mem->pages[i]),
308 cur_gatt+GET_GATT_OFF(addr));
310 readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
311 agp_bridge->driver->tlb_flush(mem);
315 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
319 unsigned long __iomem *cur_gatt;
323 mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
324 if (mask_type != 0 || type != mem->type)
327 if (mem->page_count == 0)
330 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
331 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
332 cur_gatt = GET_GATT(addr);
333 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
336 readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
337 agp_bridge->driver->tlb_flush(mem);
341 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
343 struct aper_size_info_lvl2 *value;
344 struct ati_page_map page_dir;
345 unsigned long __iomem *cur_gatt;
350 struct aper_size_info_lvl2 *current_size;
352 value = A_SIZE_LVL2(agp_bridge->current_size);
353 retval = ati_create_page_map(&page_dir);
357 retval = ati_create_gatt_pages(value->num_entries / 1024);
359 ati_free_page_map(&page_dir);
363 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
364 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
365 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
367 /* Write out the size register */
368 current_size = A_SIZE_LVL2(agp_bridge->current_size);
371 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
372 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
374 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
375 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
377 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
378 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
380 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
381 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
385 * Get the address for the gart region.
386 * This is a bus address even on the alpha, b/c its
387 * used to program the agp master not the cpu
389 addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
390 agp_bridge->gart_bus_addr = addr;
392 /* Calculate the agp offset */
393 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
394 writel(virt_to_phys(ati_generic_private.gatt_pages[i]->real) | 1,
395 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
396 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
399 for (i = 0; i < value->num_entries; i++) {
400 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
401 cur_gatt = GET_GATT(addr);
402 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
408 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
410 struct ati_page_map page_dir;
412 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
413 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
415 ati_free_gatt_pages();
416 ati_free_page_map(&page_dir);
420 static const struct agp_bridge_driver ati_generic_bridge = {
421 .owner = THIS_MODULE,
422 .aperture_sizes = ati_generic_sizes,
423 .size_type = LVL2_APER_SIZE,
424 .num_aperture_sizes = 7,
425 .needs_scratch_page = true,
426 .configure = ati_configure,
427 .fetch_size = ati_fetch_size,
428 .cleanup = ati_cleanup,
429 .tlb_flush = ati_tlbflush,
430 .mask_memory = agp_generic_mask_memory,
431 .masks = ati_generic_masks,
432 .agp_enable = agp_generic_enable,
433 .cache_flush = global_cache_flush,
434 .create_gatt_table = ati_create_gatt_table,
435 .free_gatt_table = ati_free_gatt_table,
436 .insert_memory = ati_insert_memory,
437 .remove_memory = ati_remove_memory,
438 .alloc_by_type = agp_generic_alloc_by_type,
439 .free_by_type = agp_generic_free_by_type,
440 .agp_alloc_page = agp_generic_alloc_page,
441 .agp_alloc_pages = agp_generic_alloc_pages,
442 .agp_destroy_page = agp_generic_destroy_page,
443 .agp_destroy_pages = agp_generic_destroy_pages,
444 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
448 static struct agp_device_ids ati_agp_device_ids[] =
451 .device_id = PCI_DEVICE_ID_ATI_RS100,
452 .chipset_name = "IGP320/M",
455 .device_id = PCI_DEVICE_ID_ATI_RS200,
456 .chipset_name = "IGP330/340/345/350/M",
459 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
460 .chipset_name = "IGP345M",
463 .device_id = PCI_DEVICE_ID_ATI_RS250,
464 .chipset_name = "IGP7000/M",
467 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
468 .chipset_name = "IGP9100/M",
471 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
472 .chipset_name = "IGP9100/M",
475 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
476 .chipset_name = "IGP9100/M",
479 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
480 .chipset_name = "IGP9100/M",
483 .device_id = PCI_DEVICE_ID_ATI_RS350_133,
484 .chipset_name = "IGP9000/M",
487 .device_id = PCI_DEVICE_ID_ATI_RS350_200,
488 .chipset_name = "IGP9100/M",
490 { }, /* dummy final entry, always present */
493 static int agp_ati_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
495 struct agp_device_ids *devs = ati_agp_device_ids;
496 struct agp_bridge_data *bridge;
500 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
504 /* probe for known chipsets */
505 for (j = 0; devs[j].chipset_name; j++) {
506 if (pdev->device == devs[j].device_id)
510 dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
511 pdev->vendor, pdev->device);
515 bridge = agp_alloc_bridge();
520 bridge->capndx = cap_ptr;
522 bridge->driver = &ati_generic_bridge;
524 dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
526 /* Fill in the mode register */
527 pci_read_config_dword(pdev,
528 bridge->capndx+PCI_AGP_STATUS,
531 pci_set_drvdata(pdev, bridge);
532 return agp_add_bridge(bridge);
535 static void agp_ati_remove(struct pci_dev *pdev)
537 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
539 agp_remove_bridge(bridge);
540 agp_put_bridge(bridge);
543 static const struct pci_device_id agp_ati_pci_table[] = {
545 .class = (PCI_CLASS_BRIDGE_HOST << 8),
547 .vendor = PCI_VENDOR_ID_ATI,
548 .device = PCI_ANY_ID,
549 .subvendor = PCI_ANY_ID,
550 .subdevice = PCI_ANY_ID,
555 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
557 static struct pci_driver agp_ati_pci_driver = {
558 .name = "agpgart-ati",
559 .id_table = agp_ati_pci_table,
560 .probe = agp_ati_probe,
561 .remove = agp_ati_remove,
563 .suspend = agp_ati_suspend,
564 .resume = agp_ati_resume,
568 static int __init agp_ati_init(void)
572 return pci_register_driver(&agp_ati_pci_driver);
575 static void __exit agp_ati_cleanup(void)
577 pci_unregister_driver(&agp_ati_pci_driver);
580 module_init(agp_ati_init);
581 module_exit(agp_ati_cleanup);
583 MODULE_AUTHOR("Dave Jones");
584 MODULE_LICENSE("GPL and additional rights");