Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux-2.6.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 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         int mask_type;
273
274         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
275
276         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
277         if (mask_type != 0 || type != mem->type)
278                 return -EINVAL;
279
280         if (mem->page_count == 0)
281                 return 0;
282
283         if ((pg_start + mem->page_count) > num_entries)
284                 return -EINVAL;
285
286         j = pg_start;
287         while (j < (pg_start + mem->page_count)) {
288                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
289                 cur_gatt = GET_GATT(addr);
290                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
291                         return -EBUSY;
292                 j++;
293         }
294
295         if (!mem->is_flushed) {
296                 /*CACHE_FLUSH(); */
297                 global_cache_flush();
298                 mem->is_flushed = true;
299         }
300
301         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
302                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
303                 cur_gatt = GET_GATT(addr);
304                 writel(agp_bridge->driver->mask_memory(agp_bridge,      
305                                                        page_to_phys(mem->pages[i]),
306                                                        mem->type),
307                        cur_gatt+GET_GATT_OFF(addr));
308         }
309         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
310         agp_bridge->driver->tlb_flush(mem);
311         return 0;
312 }
313
314 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
315                              int type)
316 {
317         int i;
318         unsigned long __iomem *cur_gatt;
319         unsigned long addr;
320         int mask_type;
321
322         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
323         if (mask_type != 0 || type != mem->type)
324                 return -EINVAL;
325
326         if (mem->page_count == 0)
327                 return 0;
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         }
334
335         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
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         struct ati_page_map page_dir;
344         unsigned long __iomem *cur_gatt;
345         unsigned long addr;
346         int retval;
347         u32 temp;
348         int i;
349         struct aper_size_info_lvl2 *current_size;
350
351         value = A_SIZE_LVL2(agp_bridge->current_size);
352         retval = ati_create_page_map(&page_dir);
353         if (retval != 0)
354                 return retval;
355
356         retval = ati_create_gatt_pages(value->num_entries / 1024);
357         if (retval != 0) {
358                 ati_free_page_map(&page_dir);
359                 return retval;
360         }
361
362         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
363         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
364         agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
365
366         /* Write out the size register */
367         current_size = A_SIZE_LVL2(agp_bridge->current_size);
368
369         if (is_r200()) {
370                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
371                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
372                         | 0x00000001);
373                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
374                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
375         } else {
376                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
377                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
378                         | 0x00000001);
379                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
380                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
381         }
382
383         /*
384          * Get the address for the gart region.
385          * This is a bus address even on the alpha, b/c its
386          * used to program the agp master not the cpu
387          */
388         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
389         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
390         agp_bridge->gart_bus_addr = addr;
391
392         /* Calculate the agp offset */
393         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
394                 writel(virt_to_phys(ati_generic_private.gatt_pages[i]->real) | 1,
395                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
396                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
397         }
398
399         for (i = 0; i < value->num_entries; i++) {
400                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
401                 cur_gatt = GET_GATT(addr);
402                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
403         }
404
405         return 0;
406 }
407
408 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
409 {
410         struct ati_page_map page_dir;
411
412         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
413         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
414
415         ati_free_gatt_pages();
416         ati_free_page_map(&page_dir);
417         return 0;
418 }
419
420 static const struct agp_bridge_driver ati_generic_bridge = {
421         .owner                  = THIS_MODULE,
422         .aperture_sizes         = ati_generic_sizes,
423         .size_type              = LVL2_APER_SIZE,
424         .num_aperture_sizes     = 7,
425         .needs_scratch_page     = true,
426         .configure              = ati_configure,
427         .fetch_size             = ati_fetch_size,
428         .cleanup                = ati_cleanup,
429         .tlb_flush              = ati_tlbflush,
430         .mask_memory            = agp_generic_mask_memory,
431         .masks                  = ati_generic_masks,
432         .agp_enable             = agp_generic_enable,
433         .cache_flush            = global_cache_flush,
434         .create_gatt_table      = ati_create_gatt_table,
435         .free_gatt_table        = ati_free_gatt_table,
436         .insert_memory          = ati_insert_memory,
437         .remove_memory          = ati_remove_memory,
438         .alloc_by_type          = agp_generic_alloc_by_type,
439         .free_by_type           = agp_generic_free_by_type,
440         .agp_alloc_page         = agp_generic_alloc_page,
441         .agp_alloc_pages        = agp_generic_alloc_pages,
442         .agp_destroy_page       = agp_generic_destroy_page,
443         .agp_destroy_pages      = agp_generic_destroy_pages,
444         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
445 };
446
447
448 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
449 {
450         {
451                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
452                 .chipset_name   = "IGP320/M",
453         },
454         {
455                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
456                 .chipset_name   = "IGP330/340/345/350/M",
457         },
458         {
459                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
460                 .chipset_name   = "IGP345M",
461         },
462         {
463                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
464                 .chipset_name   = "IGP7000/M",
465         },
466         {
467                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
468                 .chipset_name   = "IGP9100/M",
469         },
470         {
471                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
472                 .chipset_name   = "IGP9100/M",
473         },
474         {
475                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
476                 .chipset_name   = "IGP9100/M",
477         },
478         {
479                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
480                 .chipset_name   = "IGP9100/M",
481         },
482         {
483                 .device_id      = PCI_DEVICE_ID_ATI_RS350_133,
484                 .chipset_name   = "IGP9000/M",
485         },
486         {
487                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
488                 .chipset_name   = "IGP9100/M",
489         },
490         { }, /* dummy final entry, always present */
491 };
492
493 static int __devinit agp_ati_probe(struct pci_dev *pdev,
494                                    const struct pci_device_id *ent)
495 {
496         struct agp_device_ids *devs = ati_agp_device_ids;
497         struct agp_bridge_data *bridge;
498         u8 cap_ptr;
499         int j;
500
501         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
502         if (!cap_ptr)
503                 return -ENODEV;
504
505         /* probe for known chipsets */
506         for (j = 0; devs[j].chipset_name; j++) {
507                 if (pdev->device == devs[j].device_id)
508                         goto found;
509         }
510
511         dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
512                 pdev->vendor, pdev->device);
513         return -ENODEV;
514
515 found:
516         bridge = agp_alloc_bridge();
517         if (!bridge)
518                 return -ENOMEM;
519
520         bridge->dev = pdev;
521         bridge->capndx = cap_ptr;
522
523         bridge->driver = &ati_generic_bridge;
524
525         dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
526
527         /* Fill in the mode register */
528         pci_read_config_dword(pdev,
529                         bridge->capndx+PCI_AGP_STATUS,
530                         &bridge->mode);
531
532         pci_set_drvdata(pdev, bridge);
533         return agp_add_bridge(bridge);
534 }
535
536 static void __devexit agp_ati_remove(struct pci_dev *pdev)
537 {
538         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
539
540         agp_remove_bridge(bridge);
541         agp_put_bridge(bridge);
542 }
543
544 static struct pci_device_id agp_ati_pci_table[] = {
545         {
546         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
547         .class_mask     = ~0,
548         .vendor         = PCI_VENDOR_ID_ATI,
549         .device         = PCI_ANY_ID,
550         .subvendor      = PCI_ANY_ID,
551         .subdevice      = PCI_ANY_ID,
552         },
553         { }
554 };
555
556 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
557
558 static struct pci_driver agp_ati_pci_driver = {
559         .name           = "agpgart-ati",
560         .id_table       = agp_ati_pci_table,
561         .probe          = agp_ati_probe,
562         .remove         = agp_ati_remove,
563 #ifdef CONFIG_PM
564         .suspend        = agp_ati_suspend,
565         .resume         = agp_ati_resume,
566 #endif
567 };
568
569 static int __init agp_ati_init(void)
570 {
571         if (agp_off)
572                 return -EINVAL;
573         return pci_register_driver(&agp_ati_pci_driver);
574 }
575
576 static void __exit agp_ati_cleanup(void)
577 {
578         pci_unregister_driver(&agp_ati_pci_driver);
579 }
580
581 module_init(agp_ati_init);
582 module_exit(agp_ati_cleanup);
583
584 MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
585 MODULE_LICENSE("GPL and additional rights");
586