summaryrefslogtreecommitdiffstats
path: root/drivers/char/agp/ati-agp.c
blob: 53372a83b6758420e7c586cdd20ceb79e412050b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
/*
 * ATi AGPGART routines.
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/agp_backend.h>
#include <asm/agp.h>
#include "agp.h"

#define ATI_GART_MMBASE_ADDR	0x14
#define ATI_RS100_APSIZE	0xac
#define ATI_RS100_IG_AGPMODE	0xb0
#define ATI_RS300_APSIZE	0xf8
#define ATI_RS300_IG_AGPMODE	0xfc
#define ATI_GART_FEATURE_ID		0x00
#define ATI_GART_BASE			0x04
#define ATI_GART_CACHE_SZBASE		0x08
#define ATI_GART_CACHE_CNTRL		0x0c
#define ATI_GART_CACHE_ENTRY_CNTRL	0x10


static struct aper_size_info_lvl2 ati_generic_sizes[7] =
{
	{2048, 524288, 0x0000000c},
	{1024, 262144, 0x0000000a},
	{512, 131072, 0x00000008},
	{256, 65536, 0x00000006},
	{128, 32768, 0x00000004},
	{64, 16384, 0x00000002},
	{32, 8192, 0x00000000}
};

static struct gatt_mask ati_generic_masks[] =
{
	{ .mask = 1, .type = 0}
};



typedef struct _ati_page_map {
	unsigned long *real;
	unsigned long __iomem *remapped;
} ati_page_map;

static struct _ati_generic_private {
	volatile u8 __iomem *registers;
	ati_page_map **gatt_pages;
	int num_tables;
} ati_generic_private;

static int ati_create_page_map(ati_page_map *page_map)
{
	int i, err = 0;

	page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
	if (page_map->real == NULL)
		return -ENOMEM;

	SetPageReserved(virt_to_page(page_map->real));
	err = map_page_into_agp(virt_to_page(page_map->real));
	page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
					    PAGE_SIZE);
	if (page_map->remapped == NULL || err) {
		ClearPageReserved(virt_to_page(page_map->real));
		free_page((unsigned long) page_map->real);
		page_map->real = NULL;
		return -ENOMEM;
	}
	/*CACHE_FLUSH();*/
	global_cache_flush();

	for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
		writel(agp_bridge->scratch_page, page_map->remapped+i);
		readl(page_map->remapped+i);	/* PCI Posting. */
	}

	return 0;
}


static void ati_free_page_map(ati_page_map *page_map)
{
	unmap_page_from_agp(virt_to_page(page_map->real));
	iounmap(page_map->remapped);
	ClearPageReserved(virt_to_page(page_map->real));
	free_page((unsigned long) page_map->real);
}


static void ati_free_gatt_pages(void)
{
	int i;
	ati_page_map **tables;
	ati_page_map *entry;

	tables = ati_generic_private.gatt_pages;
	for(i = 0; i < ati_generic_private.num_tables; i++) {
		entry = tables[i];
		if (entry != NULL) {
			if (entry->real != NULL)
				ati_free_page_map(entry);
			kfree(entry);
		}
	}
	kfree(tables);
}


static int ati_create_gatt_pages(int nr_tables)
{
	ati_page_map **tables;
	ati_page_map *entry;
	int retval = 0;
	int i;

	tables = kzalloc((nr_tables + 1) * sizeof(ati_page_map *),GFP_KERNEL);
	if (tables == NULL)
		return -ENOMEM;

	for (i = 0; i < nr_tables; i++) {
		entry = kzalloc(sizeof(ati_page_map), GFP_KERNEL);
		if (entry == NULL) {
			while (i>0) {
				kfree (tables[i-1]);
				i--;
			}
			kfree (tables);
			tables = NULL;
			retval = -ENOMEM;
			break;
		}
		tables[i] = entry;
		retval = ati_create_page_map(entry);
		if (retval != 0) break;
	}
	ati_generic_private.num_tables = nr_tables;
	ati_generic_private.gatt_pages = tables;

	if (retval != 0) ati_free_gatt_pages();

	return retval;
}

static int is_r200(void)
{
	if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
	    (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
	    (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
	    (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
		return 1;
	return 0;
}

static int ati_fetch_size(void)
{
	int i;
	u32 temp;
	struct aper_size_info_lvl2 *values;

	if (is_r200())
		pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
	else
		pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);

	temp = (temp & 0x0000000e);
	values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
		if (temp == values[i].size_value) {
			agp_bridge->previous_size =
			    agp_bridge->current_size = (void *) (values + i);

			agp_bridge->aperture_size_idx = i;
			return values[i].size;
		}
	}

	return 0;
}

static void ati_tlbflush(struct agp_memory * mem)
{
	writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
	readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);	/* PCI Posting. */
}

static void ati_cleanup(void)
{
	struct aper_size_info_lvl2 *previous_size;
	u32 temp;

	previous_size = A_SIZE_LVL2(agp_bridge->previous_size);

	/* Write back the previous size and disable gart translation */
	if (is_r200()) {
		pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
		temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
		pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
	} else {
		pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
		temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
		pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
	}
	iounmap((volatile u8 __iomem *)ati_generic_private.registers);
}


static int ati_configure(void)
{
	u32 temp;

	/* Get the memory mapped registers */
	pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
	temp = (temp & 0xfffff000);
	ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);

	if (is_r200())
       	pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
	else
		pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);

	/* address to map too */
        /*
	pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
	agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
	printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
        */
	writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
	readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);	/* PCI Posting.*/

	/* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
	pci_read_config_dword(agp_bridge->dev, 4, &temp);
	pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));

	/* Write out the address of the gatt table */
	writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
	readl(ati_generic_private.registers+ATI_GART_BASE);	/* PCI Posting. */

	return 0;
}


/*
 *Since we don't need contigious memory we just try
 * to get the gatt table once
 */

#define GET_PAGE_DIR_OFF(addr) (addr >> 22)
#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
	GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
#undef  GET_GATT
#define GET_GATT(addr) (ati_generic_private.gatt_pages[\
	GET_PAGE_DIR_IDX(addr)]->remapped)

static int ati_insert_memory(struct agp_memory * mem,
			     off_t pg_start, int type)
{
	int i, j, num_entries;
	unsigned long __iomem *cur_gatt;
	unsigned long addr;

	num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;

	if (type != 0 || mem->type != 0)
		return -EINVAL;

	if ((pg_start + mem->page_count) > num_entries)
		return -EINVAL;

	j = pg_start;
	while (j < (pg_start + mem->page_count)) {
		addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
		cur_gatt = GET_GATT(addr);
		if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
			return -EBUSY;
		j++;
	}

	if (mem->is_flushed == FALSE) {
		/*CACHE_FLUSH(); */
		global_cache_flush();
		mem->is_flushed = TRUE;
	}

	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
		addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
		cur_gatt = GET_GATT(addr);
		writel(agp_bridge->driver->mask_memory(agp_bridge,
			mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
		readl(cur_gatt+GET_GATT_OFF(addr));	/* PCI Posting. */
	}
	agp_bridge->driver->tlb_flush(mem);
	return 0;
}

static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
			     int type)
{
	int i;
	unsigned long __iomem *cur_gatt;
	unsigned long addr;

	if (type != 0 || mem->type != 0) {
		return -EINVAL;
	}
	for (i = pg_start; i < (mem->page_count + pg_start); i++) {
		addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
		cur_gatt = GET_GATT(addr);
		writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
		readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
	}

	agp_bridge->driver->tlb_flush(mem);
	return 0;
}

static int ati_create_gatt_table(struct agp_bridge_data *bridge)
{
	struct aper_size_info_lvl2 *value;
	ati_page_map page_dir;
	unsigned long addr;
	int retval;
	u32 temp;
	int i;
	struct aper_size_info_lvl2 *current_size;

	value = A_SIZE_LVL2(agp_bridge->current_size);
	retval = ati_create_page_map(&page_dir);
	if (retval != 0)
		return retval;

	retval = ati_create_gatt_pages(value->num_entries / 1024);
	if (retval != 0) {
		ati_free_page_map(&page_dir);
		return retval;
	}

	agp_bridge->gatt_table_real = (u32 *)page_dir.real;
	agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
	agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);

	/* Write out the size register */
	current_size = A_SIZE_LVL2(agp_bridge->current_size);

	if (is_r200()) {
		pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
		temp = (((temp & ~(0x0000000e)) | current_size->size_value)
			| 0x00000001);
		pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
		pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
	} else {
		pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
		temp = (((temp & ~(0x0000000e)) | current_size->size_value)
			| 0x00000001);
		pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
		pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
	}

	/*
	 * Get the address for the gart region.
	 * This is a bus address even on the alpha, b/c its
	 * used to program the agp master not the cpu
	 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
	agp_bridge->gart_bus_addr = addr;

	/* Calculate the agp offset */
	for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
		writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
			page_dir.remapped+GET_PAGE_DIR_OFF(addr));
		readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));	/* PCI Posting. */
	}

	return 0;
}

static int ati_free_gatt_table(struct agp_bridge_data *bridge)
{
	ati_page_map page_dir;

	page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
	page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;

	ati_free_gatt_pages();
	ati_free_page_map(&page_dir);
	return 0;
}

static struct agp_bridge_driver ati_generic_bridge = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= ati_generic_sizes,
	.size_type		= LVL2_APER_SIZE,
	.num_aperture_sizes	= 7,
	.configure		= ati_configure,
	.fetch_size		= ati_fetch_size,
	.cleanup		= ati_cleanup,
	.tlb_flush		= ati_tlbflush,
	.mask_memory		= agp_generic_mask_memory,
	.masks			= ati_generic_masks,
	.agp_enable		= agp_generic_enable,
	.cache_flush		= global_cache_flush,
	.create_gatt_table	= ati_create_gatt_table,
	.free_gatt_table	= ati_free_gatt_table,
	.insert_memory		= ati_insert_memory,
	.remove_memory		= ati_remove_memory,
	.alloc_by_type		= agp_generic_alloc_by_type,
	.free_by_type		= agp_generic_free_by_type,
	.agp_alloc_page		= agp_generic_alloc_page,
	.agp_destroy_page	= agp_generic_destroy_page,
};


static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
{
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS100,
		.chipset_name	= "IGP320/M",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS200,
		.chipset_name	= "IGP330/340/345/350/M",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS200_B,
		.chipset_name	= "IGP345M",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS250,
		.chipset_name	= "IGP7000/M",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS300_100,
		.chipset_name	= "IGP9100/M",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS300_133,
		.chipset_name	= "IGP9100/M",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS300_166,
		.chipset_name	= "IGP9100/M",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS300_200,
		.chipset_name	= "IGP9100/M",
	},
	{ }, /* dummy final entry, always present */
};

static int __devinit agp_ati_probe(struct pci_dev *pdev,
				   const struct pci_device_id *ent)
{
	struct agp_device_ids *devs = ati_agp_device_ids;
	struct agp_bridge_data *bridge;
	u8 cap_ptr;
	int j;

	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
	if (!cap_ptr)
		return -ENODEV;

	/* probe for known chipsets */
	for (j = 0; devs[j].chipset_name; j++) {
		if (pdev->device == devs[j].device_id)
			goto found;
	}

	printk(KERN_ERR PFX
	     "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
	return -ENODEV;

found:
	bridge = agp_alloc_bridge();
	if (!bridge)
		return -ENOMEM;

	bridge->dev = pdev;
	bridge->capndx = cap_ptr;
	
	bridge->driver = &ati_generic_bridge;


	printk(KERN_INFO PFX "Detected Ati %s chipset\n",
			devs[j].chipset_name);

	/* Fill in the mode register */
	pci_read_config_dword(pdev,
			bridge->capndx+PCI_AGP_STATUS,
			&bridge->mode);

	pci_set_drvdata(pdev, bridge);
	return agp_add_bridge(bridge);
}

static void __devexit agp_ati_remove(struct pci_dev *pdev)
{
	struct agp_bridge_data *bridge = pci_get_drvdata(pdev);

	agp_remove_bridge(bridge);
	agp_put_bridge(bridge);
}

static struct pci_device_id agp_ati_pci_table[] = {
	{
	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
	.class_mask	= ~0,
	.vendor		= PCI_VENDOR_ID_ATI,
	.device		= PCI_ANY_ID,
	.subvendor	= PCI_ANY_ID,
	.subdevice	= PCI_ANY_ID,
	},
	{ }
};

MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);

static struct pci_driver agp_ati_pci_driver = {
	.name		= "agpgart-ati",
	.id_table	= agp_ati_pci_table,
	.probe		= agp_ati_probe,
	.remove		= agp_ati_remove,
};

static int __init agp_ati_init(void)
{
	if (agp_off)
		return -EINVAL;
	return pci_register_driver(&agp_ati_pci_driver);
}

static void __exit agp_ati_cleanup(void)
{
	pci_unregister_driver(&agp_ati_pci_driver);
}

module_init(agp_ati_init);
module_exit(agp_ati_cleanup);

MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
MODULE_LICENSE("GPL and additional rights");

OpenPOWER on IntegriCloud