2 * ATi AGPGART routines.
5 #include <linux/types.h>
6 #include <linux/module.h>
8 #include <linux/init.h>
9 #include <linux/agp_backend.h>
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
25 static struct aper_size_info_lvl2 ati_generic_sizes[7] =
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}
36 static struct gatt_mask ati_generic_masks[] =
38 { .mask = 1, .type = 0}
43 typedef struct _ati_page_map {
45 unsigned long *remapped;
48 static struct _ati_generic_private {
49 volatile u8 *registers;
50 ati_page_map **gatt_pages;
52 } ati_generic_private;
54 static int ati_create_page_map(ati_page_map *page_map)
58 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
59 if (page_map->real == NULL)
62 SetPageReserved(virt_to_page(page_map->real));
63 err = map_page_into_agp(virt_to_page(page_map->real));
67 page_map->remapped = ioremap_nocache(virt_to_phys(page_map->real),
69 if (page_map->remapped == NULL || err) {
70 ClearPageReserved(virt_to_page(page_map->real));
71 free_page((unsigned long) page_map->real);
72 page_map->real = NULL;
78 for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++)
79 page_map->remapped[i] = agp_bridge->scratch_page;
85 static void ati_free_page_map(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 ati_page_map **tables;
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 ati_page_map **tables;
120 tables = kmalloc((nr_tables + 1) * sizeof(ati_page_map *),
125 memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1));
126 for (i = 0; i < nr_tables; i++) {
127 entry = kmalloc(sizeof(ati_page_map), GFP_KERNEL);
138 memset(entry, 0, sizeof(ati_page_map));
140 retval = ati_create_page_map(entry);
141 if (retval != 0) break;
143 ati_generic_private.num_tables = nr_tables;
144 ati_generic_private.gatt_pages = tables;
146 if (retval != 0) ati_free_gatt_pages();
151 static int is_r200(void)
153 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
154 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
155 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
156 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
161 static int ati_fetch_size(void)
165 struct aper_size_info_lvl2 *values;
168 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
170 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
172 temp = (temp & 0x0000000e);
173 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
174 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
175 if (temp == values[i].size_value) {
176 agp_bridge->previous_size =
177 agp_bridge->current_size = (void *) (values + i);
179 agp_bridge->aperture_size_idx = i;
180 return values[i].size;
187 static void ati_tlbflush(struct agp_memory * mem)
189 OUTREG32(ati_generic_private.registers, ATI_GART_CACHE_CNTRL, 1);
192 static void ati_cleanup(void)
194 struct aper_size_info_lvl2 *previous_size;
197 previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
199 /* Write back the previous size and disable gart translation */
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);
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);
209 iounmap((void *) ati_generic_private.registers);
213 static int ati_configure(void)
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 *) ioremap(temp, 4096);
223 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
225 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
227 /* address to map too */
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);
233 OUTREG32(ati_generic_private.registers, ATI_GART_FEATURE_ID, 0x60000);
235 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
236 pci_read_config_dword(agp_bridge->dev, 4, &temp);
237 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
239 /* Write out the address of the gatt table */
240 OUTREG32(ati_generic_private.registers, ATI_GART_BASE,
241 agp_bridge->gatt_bus_addr);
248 *Since we don't need contigious memory we just try
249 * to get the gatt table once
252 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
253 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
254 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
255 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
257 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
258 GET_PAGE_DIR_IDX(addr)]->remapped)
260 static int ati_insert_memory(struct agp_memory * mem,
261 off_t pg_start, int type)
263 int i, j, num_entries;
264 unsigned long *cur_gatt;
267 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
269 if (type != 0 || mem->type != 0)
272 if ((pg_start + mem->page_count) > num_entries)
276 while (j < (pg_start + mem->page_count)) {
277 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
278 cur_gatt = GET_GATT(addr);
279 if (!PGE_EMPTY(agp_bridge,cur_gatt[GET_GATT_OFF(addr)]))
284 if (mem->is_flushed == FALSE) {
286 global_cache_flush();
287 mem->is_flushed = TRUE;
290 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
291 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
292 cur_gatt = GET_GATT(addr);
293 cur_gatt[GET_GATT_OFF(addr)] =
294 agp_bridge->driver->mask_memory(mem->memory[i], mem->type);
296 agp_bridge->driver->tlb_flush(mem);
300 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
304 unsigned long *cur_gatt;
307 if (type != 0 || mem->type != 0) {
310 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
311 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
312 cur_gatt = GET_GATT(addr);
313 cur_gatt[GET_GATT_OFF(addr)] =
314 (unsigned long) agp_bridge->scratch_page;
317 agp_bridge->driver->tlb_flush(mem);
321 static int ati_create_gatt_table(void)
323 struct aper_size_info_lvl2 *value;
324 ati_page_map page_dir;
329 struct aper_size_info_lvl2 *current_size;
331 value = A_SIZE_LVL2(agp_bridge->current_size);
332 retval = ati_create_page_map(&page_dir);
336 retval = ati_create_gatt_pages(value->num_entries / 1024);
338 ati_free_page_map(&page_dir);
342 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
343 agp_bridge->gatt_table = (u32 *)page_dir.remapped;
344 agp_bridge->gatt_bus_addr = virt_to_bus(page_dir.real);
346 /* Write out the size register */
347 current_size = A_SIZE_LVL2(agp_bridge->current_size);
350 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
351 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
353 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
354 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
356 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
357 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
359 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
360 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
364 * Get the address for the gart region.
365 * This is a bus address even on the alpha, b/c its
366 * used to program the agp master not the cpu
368 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
369 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
370 agp_bridge->gart_bus_addr = addr;
372 /* Calculate the agp offset */
373 for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
374 page_dir.remapped[GET_PAGE_DIR_OFF(addr)] =
375 virt_to_bus(ati_generic_private.gatt_pages[i]->real);
376 page_dir.remapped[GET_PAGE_DIR_OFF(addr)] |= 0x00000001;
382 static int ati_free_gatt_table(void)
384 ati_page_map page_dir;
386 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
387 page_dir.remapped = (unsigned long *)agp_bridge->gatt_table;
389 ati_free_gatt_pages();
390 ati_free_page_map(&page_dir);
394 struct agp_bridge_driver ati_generic_bridge = {
395 .owner = THIS_MODULE,
396 .aperture_sizes = ati_generic_sizes,
397 .size_type = LVL2_APER_SIZE,
398 .num_aperture_sizes = 7,
399 .configure = ati_configure,
400 .fetch_size = ati_fetch_size,
401 .cleanup = ati_cleanup,
402 .tlb_flush = ati_tlbflush,
403 .mask_memory = agp_generic_mask_memory,
404 .masks = ati_generic_masks,
405 .agp_enable = agp_generic_enable,
406 .cache_flush = global_cache_flush,
407 .create_gatt_table = ati_create_gatt_table,
408 .free_gatt_table = ati_free_gatt_table,
409 .insert_memory = ati_insert_memory,
410 .remove_memory = ati_remove_memory,
411 .alloc_by_type = agp_generic_alloc_by_type,
412 .free_by_type = agp_generic_free_by_type,
413 .agp_alloc_page = agp_generic_alloc_page,
414 .agp_destroy_page = agp_generic_destroy_page,
418 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
421 .device_id = PCI_DEVICE_ID_ATI_RS100,
422 .chipset_name = "IGP320/M",
425 .device_id = PCI_DEVICE_ID_ATI_RS200,
426 .chipset_name = "IGP330/340/345/350/M",
429 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
430 .chipset_name = "IGP345M",
433 .device_id = PCI_DEVICE_ID_ATI_RS250,
434 .chipset_name = "IGP7000/M",
437 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
438 .chipset_name = "IGP9100/M",
441 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
442 .chipset_name = "IGP9100/M",
445 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
446 .chipset_name = "IGP9100/M",
449 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
450 .chipset_name = "IGP9100/M",
452 { }, /* dummy final entry, always present */
455 static int __devinit agp_ati_probe(struct pci_dev *pdev,
456 const struct pci_device_id *ent)
458 struct agp_device_ids *devs = ati_agp_device_ids;
459 struct agp_bridge_data *bridge;
463 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
467 /* probe for known chipsets */
468 for (j = 0; devs[j].chipset_name; j++) {
469 if (pdev->device == devs[j].device_id)
474 "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
478 bridge = agp_alloc_bridge();
483 bridge->capndx = cap_ptr;
485 bridge->driver = &ati_generic_bridge;
488 printk(KERN_INFO PFX "Detected Ati %s chipset\n",
489 devs[j].chipset_name);
491 /* Fill in the mode register */
492 pci_read_config_dword(pdev,
493 bridge->capndx+PCI_AGP_STATUS,
496 pci_set_drvdata(pdev, bridge);
497 return agp_add_bridge(bridge);
500 static void __devexit agp_ati_remove(struct pci_dev *pdev)
502 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
504 agp_remove_bridge(bridge);
505 agp_put_bridge(bridge);
508 static struct pci_device_id agp_ati_pci_table[] = {
510 .class = (PCI_CLASS_BRIDGE_HOST << 8),
512 .vendor = PCI_VENDOR_ID_ATI,
513 .device = PCI_ANY_ID,
514 .subvendor = PCI_ANY_ID,
515 .subdevice = PCI_ANY_ID,
520 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
522 static struct pci_driver agp_ati_pci_driver = {
523 .name = "agpgart-ati",
524 .id_table = agp_ati_pci_table,
525 .probe = agp_ati_probe,
526 .remove = agp_ati_remove,
529 static int __init agp_ati_init(void)
531 return pci_module_init(&agp_ati_pci_driver);
534 static void __exit agp_ati_cleanup(void)
536 pci_unregister_driver(&agp_ati_pci_driver);
539 module_init(agp_ati_init);
540 module_exit(agp_ati_cleanup);
542 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
543 MODULE_LICENSE("GPL and additional rights");