[net-next-2.6.git] / drivers / char / agp / ati-agp.c

/*
 * 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;
}


#ifdef CONFIG_PM
static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
{
	pci_save_state(dev);
	pci_set_power_state(dev, 3);

	return 0;
}

static int agp_ati_resume(struct pci_dev *dev)
{
	pci_set_power_state(dev, 0);
	pci_restore_state(dev);

	return ati_configure();
}
#endif

/*
 *Since we don't need contiguous 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",
	},
	{
		.device_id	= PCI_DEVICE_ID_ATI_RS350_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,
#ifdef CONFIG_PM
	.suspend	= agp_ati_suspend,
	.resume		= agp_ati_resume,
#endif
};

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");
Commit	Line	Data
1da177e4 LT	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>
4e57b681 TS	9	#include <linux/string.h>
4e57b681 TS	10	#include <linux/slab.h>
1da177e4 LT	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
1da177e4 LT	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));
07eee78e	65	page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
1da177e4 LT	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
6a92a4e0	76	for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
1da177e4 LT	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;
6a92a4e0	101	for (i = 0; i < ati_generic_private.num_tables; i++) {
1da177e4 LT	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
0ea27d9f	120	tables = kzalloc((nr_tables + 1) * sizeof(ati_page_map *),GFP_KERNEL);
1da177e4 LT	121	if (tables == NULL)
	122	return -ENOMEM;
	123
1da177e4	124	for (i = 0; i < nr_tables; i++) {
0ea27d9f	125	entry = kzalloc(sizeof(ati_page_map), GFP_KERNEL);
1da177e4 LT	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	}
1da177e4 LT	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
89d17b96 DJ	143	if (retval != 0)
89d17b96 DJ	144	ati_free_gatt_pages();
1da177e4 LT	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())
89d17b96	222	pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
1da177e4 LT	223	else
	224	pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
	225
	226	/* address to map too */
89d17b96	227	/*
1da177e4 LT	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);
89d17b96	231	*/
1da177e4 LT	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
5dda4986	247	#ifdef CONFIG_PM
a4aec262	248	static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
5dda4986	249	{
a4aec262	250	pci_save_state(dev);
b3818ed4	251	pci_set_power_state(dev, 3);
5dda4986	252
a4aec262	253	return 0;
5dda4986 AM	254	}
5dda4986 AM	255
a4aec262	256	static int agp_ati_resume(struct pci_dev *dev)
5dda4986	257	{
b3818ed4	258	pci_set_power_state(dev, 0);
a4aec262	259	pci_restore_state(dev);
5dda4986	260
a4aec262	261	return ati_configure();
5dda4986 AM	262	}
	263	#endif
	264
1da177e4	265	/*
d6e05edc	266	*Since we don't need contiguous memory we just try
1da177e4 LT	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
89d17b96	326	if (type != 0 \|\| mem->type != 0)
1da177e4	327	return -EINVAL;
89d17b96	328
1da177e4 LT	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;
07eee78e	363	agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
1da177e4 LT	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 */
6a92a4e0	392	for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
07eee78e	393	writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) \| 1,
1da177e4 LT	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
408b664a	413	static struct agp_bridge_driver ati_generic_bridge = {
1da177e4 LT	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	},
9d1ef8a6 DJ	471	{
	472	.device_id = PCI_DEVICE_ID_ATI_RS350_200,
	473	.chipset_name = "IGP9100/M",
	474	},
1da177e4 LT	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;
1da177e4	507
89d17b96	508	bridge->driver = &ati_generic_bridge;
1da177e4 LT	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,
5dda4986	549	#ifdef CONFIG_PM
5dda4986	550	.suspend = agp_ati_suspend,
a4aec262	551	.resume = agp_ati_resume,
5dda4986	552	#endif
1da177e4 LT	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