Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6] / 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 const 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 struct ati_page_map {
45         unsigned long *real;
46         unsigned long __iomem *remapped;
47 };
48
49 static struct _ati_generic_private {
50         volatile u8 __iomem *registers;
51         struct ati_page_map **gatt_pages;
52         int num_tables;
53 } ati_generic_private;
54
55 static int ati_create_page_map(struct 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         set_memory_uc((unsigned long)page_map->real, 1);
64         err = map_page_into_agp(virt_to_page(page_map->real));
65         page_map->remapped = page_map->real;
66
67         for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
68                 writel(agp_bridge->scratch_page, page_map->remapped+i);
69                 readl(page_map->remapped+i);    /* PCI Posting. */
70         }
71
72         return 0;
73 }
74
75
76 static void ati_free_page_map(struct ati_page_map *page_map)
77 {
78         unmap_page_from_agp(virt_to_page(page_map->real));
79         set_memory_wb((unsigned long)page_map->real, 1);
80         free_page((unsigned long) page_map->real);
81 }
82
83
84 static void ati_free_gatt_pages(void)
85 {
86         int i;
87         struct ati_page_map **tables;
88         struct ati_page_map *entry;
89
90         tables = ati_generic_private.gatt_pages;
91         for (i = 0; i < ati_generic_private.num_tables; i++) {
92                 entry = tables[i];
93                 if (entry != NULL) {
94                         if (entry->real != NULL)
95                                 ati_free_page_map(entry);
96                         kfree(entry);
97                 }
98         }
99         kfree(tables);
100 }
101
102
103 static int ati_create_gatt_pages(int nr_tables)
104 {
105         struct ati_page_map **tables;
106         struct ati_page_map *entry;
107         int retval = 0;
108         int i;
109
110         tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
111         if (tables == NULL)
112                 return -ENOMEM;
113
114         for (i = 0; i < nr_tables; i++) {
115                 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
116                 tables[i] = entry;
117                 if (entry == NULL) {
118                         retval = -ENOMEM;
119                         break;
120                 }
121                 retval = ati_create_page_map(entry);
122                 if (retval != 0)
123                         break;
124         }
125         ati_generic_private.num_tables = i;
126         ati_generic_private.gatt_pages = tables;
127
128         if (retval != 0)
129                 ati_free_gatt_pages();
130
131         return retval;
132 }
133
134 static int is_r200(void)
135 {
136         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
137             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
138             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
139             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
140                 return 1;
141         return 0;
142 }
143
144 static int ati_fetch_size(void)
145 {
146         int i;
147         u32 temp;
148         struct aper_size_info_lvl2 *values;
149
150         if (is_r200())
151                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
152         else
153                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
154
155         temp = (temp & 0x0000000e);
156         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
157         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
158                 if (temp == values[i].size_value) {
159                         agp_bridge->previous_size =
160                             agp_bridge->current_size = (void *) (values + i);
161
162                         agp_bridge->aperture_size_idx = i;
163                         return values[i].size;
164                 }
165         }
166
167         return 0;
168 }
169
170 static void ati_tlbflush(struct agp_memory * mem)
171 {
172         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
173         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
174 }
175
176 static void ati_cleanup(void)
177 {
178         struct aper_size_info_lvl2 *previous_size;
179         u32 temp;
180
181         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
182
183         /* Write back the previous size and disable gart translation */
184         if (is_r200()) {
185                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
186                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
187                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
188         } else {
189                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
190                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
191                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
192         }
193         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
194 }
195
196
197 static int ati_configure(void)
198 {
199         u32 temp;
200
201         /* Get the memory mapped registers */
202         pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
203         temp = (temp & 0xfffff000);
204         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
205
206         if (!ati_generic_private.registers)
207                 return -ENOMEM;
208
209         if (is_r200())
210                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
211         else
212                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
213
214         /* address to map too */
215         /*
216         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
217         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
218         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
219         */
220         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
221         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
222
223         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
224         pci_read_config_dword(agp_bridge->dev, 4, &temp);
225         pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
226
227         /* Write out the address of the gatt table */
228         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
229         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
230
231         return 0;
232 }
233
234
235 #ifdef CONFIG_PM
236 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
237 {
238         pci_save_state(dev);
239         pci_set_power_state(dev, 3);
240
241         return 0;
242 }
243
244 static int agp_ati_resume(struct pci_dev *dev)
245 {
246         pci_set_power_state(dev, 0);
247         pci_restore_state(dev);
248
249         return ati_configure();
250 }
251 #endif
252
253 /*
254  *Since we don't need contiguous memory we just try
255  * to get the gatt table once
256  */
257
258 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
259 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
260         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
261 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
262 #undef  GET_GATT
263 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
264         GET_PAGE_DIR_IDX(addr)]->remapped)
265
266 static int ati_insert_memory(struct agp_memory * mem,
267                              off_t pg_start, int type)
268 {
269         int i, j, num_entries;
270         unsigned long __iomem *cur_gatt;
271         unsigned long addr;
272
273         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
274
275         if (type != 0 || mem->type != 0)
276                 return -EINVAL;
277
278         if ((pg_start + mem->page_count) > num_entries)
279                 return -EINVAL;
280
281         j = pg_start;
282         while (j < (pg_start + mem->page_count)) {
283                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
284                 cur_gatt = GET_GATT(addr);
285                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
286                         return -EBUSY;
287                 j++;
288         }
289
290         if (!mem->is_flushed) {
291                 /*CACHE_FLUSH(); */
292                 global_cache_flush();
293                 mem->is_flushed = true;
294         }
295
296         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
297                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
298                 cur_gatt = GET_GATT(addr);
299                 writel(agp_bridge->driver->mask_memory(agp_bridge,
300                         mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
301                 readl(cur_gatt+GET_GATT_OFF(addr));     /* PCI Posting. */
302         }
303         agp_bridge->driver->tlb_flush(mem);
304         return 0;
305 }
306
307 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
308                              int type)
309 {
310         int i;
311         unsigned long __iomem *cur_gatt;
312         unsigned long addr;
313
314         if (type != 0 || mem->type != 0)
315                 return -EINVAL;
316
317         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
318                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
319                 cur_gatt = GET_GATT(addr);
320                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
321                 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
322         }
323
324         agp_bridge->driver->tlb_flush(mem);
325         return 0;
326 }
327
328 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
329 {
330         struct aper_size_info_lvl2 *value;
331         struct ati_page_map page_dir;
332         unsigned long addr;
333         int retval;
334         u32 temp;
335         int i;
336         struct aper_size_info_lvl2 *current_size;
337
338         value = A_SIZE_LVL2(agp_bridge->current_size);
339         retval = ati_create_page_map(&page_dir);
340         if (retval != 0)
341                 return retval;
342
343         retval = ati_create_gatt_pages(value->num_entries / 1024);
344         if (retval != 0) {
345                 ati_free_page_map(&page_dir);
346                 return retval;
347         }
348
349         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
350         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
351         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
352
353         /* Write out the size register */
354         current_size = A_SIZE_LVL2(agp_bridge->current_size);
355
356         if (is_r200()) {
357                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
358                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
359                         | 0x00000001);
360                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
361                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
362         } else {
363                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
364                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
365                         | 0x00000001);
366                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
367                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
368         }
369
370         /*
371          * Get the address for the gart region.
372          * This is a bus address even on the alpha, b/c its
373          * used to program the agp master not the cpu
374          */
375         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
376         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
377         agp_bridge->gart_bus_addr = addr;
378
379         /* Calculate the agp offset */
380         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
381                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
382                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
383                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
384         }
385
386         return 0;
387 }
388
389 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
390 {
391         struct ati_page_map page_dir;
392
393         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
394         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
395
396         ati_free_gatt_pages();
397         ati_free_page_map(&page_dir);
398         return 0;
399 }
400
401 static const struct agp_bridge_driver ati_generic_bridge = {
402         .owner                  = THIS_MODULE,
403         .aperture_sizes         = ati_generic_sizes,
404         .size_type              = LVL2_APER_SIZE,
405         .num_aperture_sizes     = 7,
406         .configure              = ati_configure,
407         .fetch_size             = ati_fetch_size,
408         .cleanup                = ati_cleanup,
409         .tlb_flush              = ati_tlbflush,
410         .mask_memory            = agp_generic_mask_memory,
411         .masks                  = ati_generic_masks,
412         .agp_enable             = agp_generic_enable,
413         .cache_flush            = global_cache_flush,
414         .create_gatt_table      = ati_create_gatt_table,
415         .free_gatt_table        = ati_free_gatt_table,
416         .insert_memory          = ati_insert_memory,
417         .remove_memory          = ati_remove_memory,
418         .alloc_by_type          = agp_generic_alloc_by_type,
419         .free_by_type           = agp_generic_free_by_type,
420         .agp_alloc_page         = agp_generic_alloc_page,
421         .agp_alloc_pages        = agp_generic_alloc_pages,
422         .agp_destroy_page       = agp_generic_destroy_page,
423         .agp_destroy_pages      = agp_generic_destroy_pages,
424         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
425 };
426
427
428 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
429 {
430         {
431                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
432                 .chipset_name   = "IGP320/M",
433         },
434         {
435                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
436                 .chipset_name   = "IGP330/340/345/350/M",
437         },
438         {
439                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
440                 .chipset_name   = "IGP345M",
441         },
442         {
443                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
444                 .chipset_name   = "IGP7000/M",
445         },
446         {
447                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
448                 .chipset_name   = "IGP9100/M",
449         },
450         {
451                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
452                 .chipset_name   = "IGP9100/M",
453         },
454         {
455                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
456                 .chipset_name   = "IGP9100/M",
457         },
458         {
459                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
460                 .chipset_name   = "IGP9100/M",
461         },
462         {
463                 .device_id      = PCI_DEVICE_ID_ATI_RS350_133,
464                 .chipset_name   = "IGP9000/M",
465         },
466         {
467                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
468                 .chipset_name   = "IGP9100/M",
469         },
470         { }, /* dummy final entry, always present */
471 };
472
473 static int __devinit agp_ati_probe(struct pci_dev *pdev,
474                                    const struct pci_device_id *ent)
475 {
476         struct agp_device_ids *devs = ati_agp_device_ids;
477         struct agp_bridge_data *bridge;
478         u8 cap_ptr;
479         int j;
480
481         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
482         if (!cap_ptr)
483                 return -ENODEV;
484
485         /* probe for known chipsets */
486         for (j = 0; devs[j].chipset_name; j++) {
487                 if (pdev->device == devs[j].device_id)
488                         goto found;
489         }
490
491         dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
492                 pdev->vendor, pdev->device);
493         return -ENODEV;
494
495 found:
496         bridge = agp_alloc_bridge();
497         if (!bridge)
498                 return -ENOMEM;
499
500         bridge->dev = pdev;
501         bridge->capndx = cap_ptr;
502
503         bridge->driver = &ati_generic_bridge;
504
505         dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
506
507         /* Fill in the mode register */
508         pci_read_config_dword(pdev,
509                         bridge->capndx+PCI_AGP_STATUS,
510                         &bridge->mode);
511
512         pci_set_drvdata(pdev, bridge);
513         return agp_add_bridge(bridge);
514 }
515
516 static void __devexit agp_ati_remove(struct pci_dev *pdev)
517 {
518         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
519
520         agp_remove_bridge(bridge);
521         agp_put_bridge(bridge);
522 }
523
524 static struct pci_device_id agp_ati_pci_table[] = {
525         {
526         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
527         .class_mask     = ~0,
528         .vendor         = PCI_VENDOR_ID_ATI,
529         .device         = PCI_ANY_ID,
530         .subvendor      = PCI_ANY_ID,
531         .subdevice      = PCI_ANY_ID,
532         },
533         { }
534 };
535
536 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
537
538 static struct pci_driver agp_ati_pci_driver = {
539         .name           = "agpgart-ati",
540         .id_table       = agp_ati_pci_table,
541         .probe          = agp_ati_probe,
542         .remove         = agp_ati_remove,
543 #ifdef CONFIG_PM
544         .suspend        = agp_ati_suspend,
545         .resume         = agp_ati_resume,
546 #endif
547 };
548
549 static int __init agp_ati_init(void)
550 {
551         if (agp_off)
552                 return -EINVAL;
553         return pci_register_driver(&agp_ati_pci_driver);
554 }
555
556 static void __exit agp_ati_cleanup(void)
557 {
558         pci_unregister_driver(&agp_ati_pci_driver);
559 }
560
561 module_init(agp_ati_init);
562 module_exit(agp_ati_cleanup);
563
564 MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
565 MODULE_LICENSE("GPL and additional rights");
566