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 __iomem *remapped;
48 static struct _ati_generic_private {
49 volatile u8 __iomem *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));
64 page_map->remapped = ioremap_nocache(virt_to_phys(page_map->real),
66 if (page_map->remapped == NULL || err) {
67 ClearPageReserved(virt_to_page(page_map->real));
68 free_page((unsigned long) page_map->real);
69 page_map->real = NULL;
75 for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
76 writel(agp_bridge->scratch_page, page_map->remapped+i);
77 readl(page_map->remapped+i); /* PCI Posting. */
84 static void ati_free_page_map(ati_page_map *page_map)
86 unmap_page_from_agp(virt_to_page(page_map->real));
87 iounmap(page_map->remapped);
88 ClearPageReserved(virt_to_page(page_map->real));
89 free_page((unsigned long) page_map->real);
93 static void ati_free_gatt_pages(void)
96 ati_page_map **tables;
99 tables = ati_generic_private.gatt_pages;
100 for(i = 0; i < ati_generic_private.num_tables; i++) {
103 if (entry->real != NULL)
104 ati_free_page_map(entry);
112 static int ati_create_gatt_pages(int nr_tables)
114 ati_page_map **tables;
119 tables = kmalloc((nr_tables + 1) * sizeof(ati_page_map *),
124 memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1));
125 for (i = 0; i < nr_tables; i++) {
126 entry = kmalloc(sizeof(ati_page_map), GFP_KERNEL);
137 memset(entry, 0, sizeof(ati_page_map));
139 retval = ati_create_page_map(entry);
140 if (retval != 0) break;
142 ati_generic_private.num_tables = nr_tables;
143 ati_generic_private.gatt_pages = tables;
145 if (retval != 0) ati_free_gatt_pages();
150 static int is_r200(void)
152 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
153 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
154 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
155 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
160 static int ati_fetch_size(void)
164 struct aper_size_info_lvl2 *values;
167 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
169 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
171 temp = (temp & 0x0000000e);
172 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
173 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
174 if (temp == values[i].size_value) {
175 agp_bridge->previous_size =
176 agp_bridge->current_size = (void *) (values + i);
178 agp_bridge->aperture_size_idx = i;
179 return values[i].size;
186 static void ati_tlbflush(struct agp_memory * mem)
188 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
189 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */
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((volatile u8 __iomem *)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 __iomem *) 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 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
234 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/
236 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
237 pci_read_config_dword(agp_bridge->dev, 4, &temp);
238 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
240 /* Write out the address of the gatt table */
241 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
242 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */
249 *Since we don't need contigious memory we just try
250 * to get the gatt table once
253 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
254 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
255 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
256 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
258 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
259 GET_PAGE_DIR_IDX(addr)]->remapped)
261 static int ati_insert_memory(struct agp_memory * mem,
262 off_t pg_start, int type)
264 int i, j, num_entries;
265 unsigned long __iomem *cur_gatt;
268 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
270 if (type != 0 || mem->type != 0)
273 if ((pg_start + mem->page_count) > num_entries)
277 while (j < (pg_start + mem->page_count)) {
278 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
279 cur_gatt = GET_GATT(addr);
280 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
285 if (mem->is_flushed == FALSE) {
287 global_cache_flush();
288 mem->is_flushed = TRUE;
291 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
292 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
293 cur_gatt = GET_GATT(addr);
294 writel(agp_bridge->driver->mask_memory(mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
295 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
297 agp_bridge->driver->tlb_flush(mem);
301 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
305 unsigned long __iomem *cur_gatt;
308 if (type != 0 || mem->type != 0) {
311 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
312 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
313 cur_gatt = GET_GATT(addr);
314 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
315 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
318 agp_bridge->driver->tlb_flush(mem);
322 static int ati_create_gatt_table(void)
324 struct aper_size_info_lvl2 *value;
325 ati_page_map page_dir;
330 struct aper_size_info_lvl2 *current_size;
332 value = A_SIZE_LVL2(agp_bridge->current_size);
333 retval = ati_create_page_map(&page_dir);
337 retval = ati_create_gatt_pages(value->num_entries / 1024);
339 ati_free_page_map(&page_dir);
343 agp_bridge->gatt_table_real = (u32 *)page_dir.real;
344 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
345 agp_bridge->gatt_bus_addr = virt_to_bus(page_dir.real);
347 /* Write out the size register */
348 current_size = A_SIZE_LVL2(agp_bridge->current_size);
351 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
352 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
354 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
355 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
357 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
358 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
360 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
361 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
365 * Get the address for the gart region.
366 * This is a bus address even on the alpha, b/c its
367 * used to program the agp master not the cpu
369 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
370 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
371 agp_bridge->gart_bus_addr = addr;
373 /* Calculate the agp offset */
374 for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
375 writel(virt_to_bus(ati_generic_private.gatt_pages[i]->real) | 1,
376 page_dir.remapped+GET_PAGE_DIR_OFF(addr));
377 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */
383 static int ati_free_gatt_table(void)
385 ati_page_map page_dir;
387 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
388 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
390 ati_free_gatt_pages();
391 ati_free_page_map(&page_dir);
395 struct agp_bridge_driver ati_generic_bridge = {
396 .owner = THIS_MODULE,
397 .aperture_sizes = ati_generic_sizes,
398 .size_type = LVL2_APER_SIZE,
399 .num_aperture_sizes = 7,
400 .configure = ati_configure,
401 .fetch_size = ati_fetch_size,
402 .cleanup = ati_cleanup,
403 .tlb_flush = ati_tlbflush,
404 .mask_memory = agp_generic_mask_memory,
405 .masks = ati_generic_masks,
406 .agp_enable = agp_generic_enable,
407 .cache_flush = global_cache_flush,
408 .create_gatt_table = ati_create_gatt_table,
409 .free_gatt_table = ati_free_gatt_table,
410 .insert_memory = ati_insert_memory,
411 .remove_memory = ati_remove_memory,
412 .alloc_by_type = agp_generic_alloc_by_type,
413 .free_by_type = agp_generic_free_by_type,
414 .agp_alloc_page = agp_generic_alloc_page,
415 .agp_destroy_page = agp_generic_destroy_page,
419 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
422 .device_id = PCI_DEVICE_ID_ATI_RS100,
423 .chipset_name = "IGP320/M",
426 .device_id = PCI_DEVICE_ID_ATI_RS200,
427 .chipset_name = "IGP330/340/345/350/M",
430 .device_id = PCI_DEVICE_ID_ATI_RS200_B,
431 .chipset_name = "IGP345M",
434 .device_id = PCI_DEVICE_ID_ATI_RS250,
435 .chipset_name = "IGP7000/M",
438 .device_id = PCI_DEVICE_ID_ATI_RS300_100,
439 .chipset_name = "IGP9100/M",
442 .device_id = PCI_DEVICE_ID_ATI_RS300_133,
443 .chipset_name = "IGP9100/M",
446 .device_id = PCI_DEVICE_ID_ATI_RS300_166,
447 .chipset_name = "IGP9100/M",
450 .device_id = PCI_DEVICE_ID_ATI_RS300_200,
451 .chipset_name = "IGP9100/M",
453 { }, /* dummy final entry, always present */
456 static int __devinit agp_ati_probe(struct pci_dev *pdev,
457 const struct pci_device_id *ent)
459 struct agp_device_ids *devs = ati_agp_device_ids;
460 struct agp_bridge_data *bridge;
464 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
468 /* probe for known chipsets */
469 for (j = 0; devs[j].chipset_name; j++) {
470 if (pdev->device == devs[j].device_id)
475 "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
479 bridge = agp_alloc_bridge();
484 bridge->capndx = cap_ptr;
486 bridge->driver = &ati_generic_bridge;
489 printk(KERN_INFO PFX "Detected Ati %s chipset\n",
490 devs[j].chipset_name);
492 /* Fill in the mode register */
493 pci_read_config_dword(pdev,
494 bridge->capndx+PCI_AGP_STATUS,
497 pci_set_drvdata(pdev, bridge);
498 return agp_add_bridge(bridge);
501 static void __devexit agp_ati_remove(struct pci_dev *pdev)
503 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
505 agp_remove_bridge(bridge);
506 agp_put_bridge(bridge);
509 static struct pci_device_id agp_ati_pci_table[] = {
511 .class = (PCI_CLASS_BRIDGE_HOST << 8),
513 .vendor = PCI_VENDOR_ID_ATI,
514 .device = PCI_ANY_ID,
515 .subvendor = PCI_ANY_ID,
516 .subdevice = PCI_ANY_ID,
521 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
523 static struct pci_driver agp_ati_pci_driver = {
524 .name = "agpgart-ati",
525 .id_table = agp_ati_pci_table,
526 .probe = agp_ati_probe,
527 .remove = agp_ati_remove,
530 static int __init agp_ati_init(void)
532 return pci_module_init(&agp_ati_pci_driver);
535 static void __exit agp_ati_cleanup(void)
537 pci_unregister_driver(&agp_ati_pci_driver);
540 module_init(agp_ati_init);
541 module_exit(agp_ati_cleanup);
543 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
544 MODULE_LICENSE("GPL and additional rights");