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");