548 lines
14 KiB
C
548 lines
14 KiB
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;
|
|
}
|
|
|
|
|
|
/*
|
|
*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");
|
|
|