Merge ../linus
[pandora-kernel.git] / drivers / char / agp / ati-agp.c
1 /*
2  * ATi AGPGART routines.
3  */
4
5 #include <linux/types.h>
6 #include <linux/module.h>
7 #include <linux/pci.h>
8 #include <linux/init.h>
9 #include <linux/string.h>
10 #include <linux/slab.h>
11 #include <linux/agp_backend.h>
12 #include <asm/agp.h>
13 #include "agp.h"
14
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
25
26
27 static struct aper_size_info_lvl2 ati_generic_sizes[7] =
28 {
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}
36 };
37
38 static struct gatt_mask ati_generic_masks[] =
39 {
40         { .mask = 1, .type = 0}
41 };
42
43
44 typedef struct _ati_page_map {
45         unsigned long *real;
46         unsigned long __iomem *remapped;
47 } ati_page_map;
48
49 static struct _ati_generic_private {
50         volatile u8 __iomem *registers;
51         ati_page_map **gatt_pages;
52         int num_tables;
53 } ati_generic_private;
54
55 static int ati_create_page_map(ati_page_map *page_map)
56 {
57         int i, err = 0;
58
59         page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
60         if (page_map->real == NULL)
61                 return -ENOMEM;
62
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),
66                                             PAGE_SIZE);
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;
71                 return -ENOMEM;
72         }
73         /*CACHE_FLUSH();*/
74         global_cache_flush();
75
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. */
79         }
80
81         return 0;
82 }
83
84
85 static void ati_free_page_map(ati_page_map *page_map)
86 {
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);
91 }
92
93
94 static void ati_free_gatt_pages(void)
95 {
96         int i;
97         ati_page_map **tables;
98         ati_page_map *entry;
99
100         tables = ati_generic_private.gatt_pages;
101         for (i = 0; i < ati_generic_private.num_tables; i++) {
102                 entry = tables[i];
103                 if (entry != NULL) {
104                         if (entry->real != NULL)
105                                 ati_free_page_map(entry);
106                         kfree(entry);
107                 }
108         }
109         kfree(tables);
110 }
111
112
113 static int ati_create_gatt_pages(int nr_tables)
114 {
115         ati_page_map **tables;
116         ati_page_map *entry;
117         int retval = 0;
118         int i;
119
120         tables = kzalloc((nr_tables + 1) * sizeof(ati_page_map *),GFP_KERNEL);
121         if (tables == NULL)
122                 return -ENOMEM;
123
124         for (i = 0; i < nr_tables; i++) {
125                 entry = kzalloc(sizeof(ati_page_map), GFP_KERNEL);
126                 if (entry == NULL) {
127                         while (i>0) {
128                                 kfree (tables[i-1]);
129                                 i--;
130                         }
131                         kfree (tables);
132                         tables = NULL;
133                         retval = -ENOMEM;
134                         break;
135                 }
136                 tables[i] = entry;
137                 retval = ati_create_page_map(entry);
138                 if (retval != 0) break;
139         }
140         ati_generic_private.num_tables = nr_tables;
141         ati_generic_private.gatt_pages = tables;
142
143         if (retval != 0)
144                 ati_free_gatt_pages();
145
146         return retval;
147 }
148
149 static int is_r200(void)
150 {
151         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
152             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
153             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
154             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
155                 return 1;
156         return 0;
157 }
158
159 static int ati_fetch_size(void)
160 {
161         int i;
162         u32 temp;
163         struct aper_size_info_lvl2 *values;
164
165         if (is_r200())
166                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
167         else
168                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
169
170         temp = (temp & 0x0000000e);
171         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
172         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
173                 if (temp == values[i].size_value) {
174                         agp_bridge->previous_size =
175                             agp_bridge->current_size = (void *) (values + i);
176
177                         agp_bridge->aperture_size_idx = i;
178                         return values[i].size;
179                 }
180         }
181
182         return 0;
183 }
184
185 static void ati_tlbflush(struct agp_memory * mem)
186 {
187         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
188         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
189 }
190
191 static void ati_cleanup(void)
192 {
193         struct aper_size_info_lvl2 *previous_size;
194         u32 temp;
195
196         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
197
198         /* Write back the previous size and disable gart translation */
199         if (is_r200()) {
200                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
201                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
202                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
203         } else {
204                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
205                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
206                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
207         }
208         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
209 }
210
211
212 static int ati_configure(void)
213 {
214         u32 temp;
215
216         /* Get the memory mapped registers */
217         pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
218         temp = (temp & 0xfffff000);
219         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
220
221         if (is_r200())
222                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
223         else
224                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
225
226         /* address to map too */
227         /*
228         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
229         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
230         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
231         */
232         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
233         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
234
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));
238
239         /* Write out the address of the gatt table */
240         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
241         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
242
243         return 0;
244 }
245
246
247 #ifdef CONFIG_PM
248 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
249 {
250         pci_save_state(dev);
251         pci_set_power_state(dev, 3);
252
253         return 0;
254 }
255
256 static int agp_ati_resume(struct pci_dev *dev)
257 {
258         pci_set_power_state(dev, 0);
259         pci_restore_state(dev);
260
261         return ati_configure();
262 }
263 #endif
264
265 /*
266  *Since we don't need contiguous memory we just try
267  * to get the gatt table once
268  */
269
270 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
271 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
272         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
273 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
274 #undef  GET_GATT
275 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
276         GET_PAGE_DIR_IDX(addr)]->remapped)
277
278 static int ati_insert_memory(struct agp_memory * mem,
279                              off_t pg_start, int type)
280 {
281         int i, j, num_entries;
282         unsigned long __iomem *cur_gatt;
283         unsigned long addr;
284
285         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
286
287         if (type != 0 || mem->type != 0)
288                 return -EINVAL;
289
290         if ((pg_start + mem->page_count) > num_entries)
291                 return -EINVAL;
292
293         j = pg_start;
294         while (j < (pg_start + mem->page_count)) {
295                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
296                 cur_gatt = GET_GATT(addr);
297                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
298                         return -EBUSY;
299                 j++;
300         }
301
302         if (mem->is_flushed == FALSE) {
303                 /*CACHE_FLUSH(); */
304                 global_cache_flush();
305                 mem->is_flushed = TRUE;
306         }
307
308         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
309                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
310                 cur_gatt = GET_GATT(addr);
311                 writel(agp_bridge->driver->mask_memory(agp_bridge,
312                         mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
313                 readl(cur_gatt+GET_GATT_OFF(addr));     /* PCI Posting. */
314         }
315         agp_bridge->driver->tlb_flush(mem);
316         return 0;
317 }
318
319 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
320                              int type)
321 {
322         int i;
323         unsigned long __iomem *cur_gatt;
324         unsigned long addr;
325
326         if (type != 0 || mem->type != 0)
327                 return -EINVAL;
328
329         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
330                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
331                 cur_gatt = GET_GATT(addr);
332                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
333                 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
334         }
335
336         agp_bridge->driver->tlb_flush(mem);
337         return 0;
338 }
339
340 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
341 {
342         struct aper_size_info_lvl2 *value;
343         ati_page_map page_dir;
344         unsigned long addr;
345         int retval;
346         u32 temp;
347         int i;
348         struct aper_size_info_lvl2 *current_size;
349
350         value = A_SIZE_LVL2(agp_bridge->current_size);
351         retval = ati_create_page_map(&page_dir);
352         if (retval != 0)
353                 return retval;
354
355         retval = ati_create_gatt_pages(value->num_entries / 1024);
356         if (retval != 0) {
357                 ati_free_page_map(&page_dir);
358                 return retval;
359         }
360
361         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
362         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
363         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
364
365         /* Write out the size register */
366         current_size = A_SIZE_LVL2(agp_bridge->current_size);
367
368         if (is_r200()) {
369                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
370                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
371                         | 0x00000001);
372                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
373                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
374         } else {
375                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
376                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
377                         | 0x00000001);
378                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
379                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
380         }
381
382         /*
383          * Get the address for the gart region.
384          * This is a bus address even on the alpha, b/c its
385          * used to program the agp master not the cpu
386          */
387         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
388         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
389         agp_bridge->gart_bus_addr = addr;
390
391         /* Calculate the agp offset */
392         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
393                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
394                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
395                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
396         }
397
398         return 0;
399 }
400
401 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
402 {
403         ati_page_map page_dir;
404
405         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
406         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
407
408         ati_free_gatt_pages();
409         ati_free_page_map(&page_dir);
410         return 0;
411 }
412
413 static struct agp_bridge_driver ati_generic_bridge = {
414         .owner                  = THIS_MODULE,
415         .aperture_sizes         = ati_generic_sizes,
416         .size_type              = LVL2_APER_SIZE,
417         .num_aperture_sizes     = 7,
418         .configure              = ati_configure,
419         .fetch_size             = ati_fetch_size,
420         .cleanup                = ati_cleanup,
421         .tlb_flush              = ati_tlbflush,
422         .mask_memory            = agp_generic_mask_memory,
423         .masks                  = ati_generic_masks,
424         .agp_enable             = agp_generic_enable,
425         .cache_flush            = global_cache_flush,
426         .create_gatt_table      = ati_create_gatt_table,
427         .free_gatt_table        = ati_free_gatt_table,
428         .insert_memory          = ati_insert_memory,
429         .remove_memory          = ati_remove_memory,
430         .alloc_by_type          = agp_generic_alloc_by_type,
431         .free_by_type           = agp_generic_free_by_type,
432         .agp_alloc_page         = agp_generic_alloc_page,
433         .agp_destroy_page       = agp_generic_destroy_page,
434 };
435
436
437 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
438 {
439         {
440                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
441                 .chipset_name   = "IGP320/M",
442         },
443         {
444                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
445                 .chipset_name   = "IGP330/340/345/350/M",
446         },
447         {
448                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
449                 .chipset_name   = "IGP345M",
450         },
451         {
452                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
453                 .chipset_name   = "IGP7000/M",
454         },
455         {
456                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
457                 .chipset_name   = "IGP9100/M",
458         },
459         {
460                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
461                 .chipset_name   = "IGP9100/M",
462         },
463         {
464                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
465                 .chipset_name   = "IGP9100/M",
466         },
467         {
468                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
469                 .chipset_name   = "IGP9100/M",
470         },
471         {
472                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
473                 .chipset_name   = "IGP9100/M",
474         },
475         { }, /* dummy final entry, always present */
476 };
477
478 static int __devinit agp_ati_probe(struct pci_dev *pdev,
479                                    const struct pci_device_id *ent)
480 {
481         struct agp_device_ids *devs = ati_agp_device_ids;
482         struct agp_bridge_data *bridge;
483         u8 cap_ptr;
484         int j;
485
486         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
487         if (!cap_ptr)
488                 return -ENODEV;
489
490         /* probe for known chipsets */
491         for (j = 0; devs[j].chipset_name; j++) {
492                 if (pdev->device == devs[j].device_id)
493                         goto found;
494         }
495
496         printk(KERN_ERR PFX
497              "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
498         return -ENODEV;
499
500 found:
501         bridge = agp_alloc_bridge();
502         if (!bridge)
503                 return -ENOMEM;
504
505         bridge->dev = pdev;
506         bridge->capndx = cap_ptr;
507
508         bridge->driver = &ati_generic_bridge;
509
510         printk(KERN_INFO PFX "Detected Ati %s chipset\n",
511                         devs[j].chipset_name);
512
513         /* Fill in the mode register */
514         pci_read_config_dword(pdev,
515                         bridge->capndx+PCI_AGP_STATUS,
516                         &bridge->mode);
517
518         pci_set_drvdata(pdev, bridge);
519         return agp_add_bridge(bridge);
520 }
521
522 static void __devexit agp_ati_remove(struct pci_dev *pdev)
523 {
524         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
525
526         agp_remove_bridge(bridge);
527         agp_put_bridge(bridge);
528 }
529
530 static struct pci_device_id agp_ati_pci_table[] = {
531         {
532         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
533         .class_mask     = ~0,
534         .vendor         = PCI_VENDOR_ID_ATI,
535         .device         = PCI_ANY_ID,
536         .subvendor      = PCI_ANY_ID,
537         .subdevice      = PCI_ANY_ID,
538         },
539         { }
540 };
541
542 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
543
544 static struct pci_driver agp_ati_pci_driver = {
545         .name           = "agpgart-ati",
546         .id_table       = agp_ati_pci_table,
547         .probe          = agp_ati_probe,
548         .remove         = agp_ati_remove,
549 #ifdef CONFIG_PM
550         .suspend        = agp_ati_suspend,
551         .resume         = agp_ati_resume,
552 #endif
553 };
554
555 static int __init agp_ati_init(void)
556 {
557         if (agp_off)
558                 return -EINVAL;
559         return pci_register_driver(&agp_ati_pci_driver);
560 }
561
562 static void __exit agp_ati_cleanup(void)
563 {
564         pci_unregister_driver(&agp_ati_pci_driver);
565 }
566
567 module_init(agp_ati_init);
568 module_exit(agp_ati_cleanup);
569
570 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
571 MODULE_LICENSE("GPL and additional rights");
572