389 lines
9.5 KiB
C
389 lines
9.5 KiB
C
/*
|
|
* UniNorth AGPGART routines.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/agp_backend.h>
|
|
#include <asm/uninorth.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include "agp.h"
|
|
|
|
static int uninorth_fetch_size(void)
|
|
{
|
|
int i;
|
|
u32 temp;
|
|
struct aper_size_info_32 *values;
|
|
|
|
pci_read_config_dword(agp_bridge->dev, UNI_N_CFG_GART_BASE, &temp);
|
|
temp &= ~(0xfffff000);
|
|
values = A_SIZE_32(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;
|
|
}
|
|
}
|
|
|
|
agp_bridge->previous_size =
|
|
agp_bridge->current_size = (void *) (values + 1);
|
|
agp_bridge->aperture_size_idx = 1;
|
|
return values[1].size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void uninorth_tlbflush(struct agp_memory *mem)
|
|
{
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL);
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
UNI_N_CFG_GART_ENABLE);
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_2xRESET);
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
UNI_N_CFG_GART_ENABLE);
|
|
}
|
|
|
|
static void uninorth_cleanup(void)
|
|
{
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL);
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
0);
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
UNI_N_CFG_GART_2xRESET);
|
|
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
|
|
0);
|
|
}
|
|
|
|
static int uninorth_configure(void)
|
|
{
|
|
struct aper_size_info_32 *current_size;
|
|
|
|
current_size = A_SIZE_32(agp_bridge->current_size);
|
|
|
|
printk(KERN_INFO PFX "configuring for size idx: %d\n",
|
|
current_size->size_value);
|
|
|
|
/* aperture size and gatt addr */
|
|
pci_write_config_dword(agp_bridge->dev,
|
|
UNI_N_CFG_GART_BASE,
|
|
(agp_bridge->gatt_bus_addr & 0xfffff000)
|
|
| current_size->size_value);
|
|
|
|
/* HACK ALERT
|
|
* UniNorth seem to be buggy enough not to handle properly when
|
|
* the AGP aperture isn't mapped at bus physical address 0
|
|
*/
|
|
agp_bridge->gart_bus_addr = 0;
|
|
pci_write_config_dword(agp_bridge->dev,
|
|
UNI_N_CFG_AGP_BASE, agp_bridge->gart_bus_addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int uninorth_insert_memory(struct agp_memory *mem, off_t pg_start,
|
|
int type)
|
|
{
|
|
int i, j, num_entries;
|
|
void *temp;
|
|
|
|
temp = agp_bridge->current_size;
|
|
num_entries = A_SIZE_32(temp)->num_entries;
|
|
|
|
if (type != 0 || mem->type != 0)
|
|
/* We know nothing of memory types */
|
|
return -EINVAL;
|
|
if ((pg_start + mem->page_count) > num_entries)
|
|
return -EINVAL;
|
|
|
|
j = pg_start;
|
|
|
|
while (j < (pg_start + mem->page_count)) {
|
|
if (!PGE_EMPTY(agp_bridge, agp_bridge->gatt_table[j]))
|
|
return -EBUSY;
|
|
j++;
|
|
}
|
|
|
|
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
|
|
agp_bridge->gatt_table[j] = cpu_to_le32((mem->memory[i] & 0xfffff000) | 0x00000001UL);
|
|
flush_dcache_range((unsigned long)__va(mem->memory[i]),
|
|
(unsigned long)__va(mem->memory[i])+0x1000);
|
|
}
|
|
(void)in_le32((volatile u32*)&agp_bridge->gatt_table[pg_start]);
|
|
mb();
|
|
flush_dcache_range((unsigned long)&agp_bridge->gatt_table[pg_start],
|
|
(unsigned long)&agp_bridge->gatt_table[pg_start + mem->page_count]);
|
|
|
|
uninorth_tlbflush(mem);
|
|
return 0;
|
|
}
|
|
|
|
static void uninorth_agp_enable(u32 mode)
|
|
{
|
|
u32 command, scratch;
|
|
int timeout;
|
|
|
|
pci_read_config_dword(agp_bridge->dev,
|
|
agp_bridge->capndx + PCI_AGP_STATUS,
|
|
&command);
|
|
|
|
command = agp_collect_device_status(mode, command);
|
|
command |= 0x100;
|
|
|
|
uninorth_tlbflush(NULL);
|
|
|
|
timeout = 0;
|
|
do {
|
|
pci_write_config_dword(agp_bridge->dev,
|
|
agp_bridge->capndx + PCI_AGP_COMMAND,
|
|
command);
|
|
pci_read_config_dword(agp_bridge->dev,
|
|
agp_bridge->capndx + PCI_AGP_COMMAND,
|
|
&scratch);
|
|
} while ((scratch & 0x100) == 0 && ++timeout < 1000);
|
|
if ((scratch & 0x100) == 0)
|
|
printk(KERN_ERR PFX "failed to write UniNorth AGP command reg\n");
|
|
|
|
agp_device_command(command, 0);
|
|
|
|
uninorth_tlbflush(NULL);
|
|
}
|
|
|
|
static int uninorth_create_gatt_table(void)
|
|
{
|
|
char *table;
|
|
char *table_end;
|
|
int size;
|
|
int page_order;
|
|
int num_entries;
|
|
int i;
|
|
void *temp;
|
|
struct page *page;
|
|
|
|
/* We can't handle 2 level gatt's */
|
|
if (agp_bridge->driver->size_type == LVL2_APER_SIZE)
|
|
return -EINVAL;
|
|
|
|
table = NULL;
|
|
i = agp_bridge->aperture_size_idx;
|
|
temp = agp_bridge->current_size;
|
|
size = page_order = num_entries = 0;
|
|
|
|
do {
|
|
size = A_SIZE_32(temp)->size;
|
|
page_order = A_SIZE_32(temp)->page_order;
|
|
num_entries = A_SIZE_32(temp)->num_entries;
|
|
|
|
table = (char *) __get_free_pages(GFP_KERNEL, page_order);
|
|
|
|
if (table == NULL) {
|
|
i++;
|
|
agp_bridge->current_size = A_IDX32(agp_bridge);
|
|
} else {
|
|
agp_bridge->aperture_size_idx = i;
|
|
}
|
|
} while (!table && (i < agp_bridge->driver->num_aperture_sizes));
|
|
|
|
if (table == NULL)
|
|
return -ENOMEM;
|
|
|
|
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
|
|
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
SetPageReserved(page);
|
|
|
|
agp_bridge->gatt_table_real = (u32 *) table;
|
|
agp_bridge->gatt_table = (u32 *)table;
|
|
agp_bridge->gatt_bus_addr = virt_to_phys(table);
|
|
|
|
for (i = 0; i < num_entries; i++) {
|
|
agp_bridge->gatt_table[i] =
|
|
(unsigned long) agp_bridge->scratch_page;
|
|
}
|
|
|
|
flush_dcache_range((unsigned long)table, (unsigned long)table_end);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int uninorth_free_gatt_table(void)
|
|
{
|
|
int page_order;
|
|
char *table, *table_end;
|
|
void *temp;
|
|
struct page *page;
|
|
|
|
temp = agp_bridge->current_size;
|
|
page_order = A_SIZE_32(temp)->page_order;
|
|
|
|
/* Do not worry about freeing memory, because if this is
|
|
* called, then all agp memory is deallocated and removed
|
|
* from the table.
|
|
*/
|
|
|
|
table = (char *) agp_bridge->gatt_table_real;
|
|
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
|
|
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
ClearPageReserved(page);
|
|
|
|
free_pages((unsigned long) agp_bridge->gatt_table_real, page_order);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void null_cache_flush(void)
|
|
{
|
|
mb();
|
|
}
|
|
|
|
/* Setup function */
|
|
|
|
static struct aper_size_info_32 uninorth_sizes[7] =
|
|
{
|
|
#if 0 /* Not sure uninorth supports that high aperture sizes */
|
|
{256, 65536, 6, 64},
|
|
{128, 32768, 5, 32},
|
|
{64, 16384, 4, 16},
|
|
#endif
|
|
{32, 8192, 3, 8},
|
|
{16, 4096, 2, 4},
|
|
{8, 2048, 1, 2},
|
|
{4, 1024, 0, 1}
|
|
};
|
|
|
|
struct agp_bridge_driver uninorth_agp_driver = {
|
|
.owner = THIS_MODULE,
|
|
.aperture_sizes = (void *)uninorth_sizes,
|
|
.size_type = U32_APER_SIZE,
|
|
.num_aperture_sizes = 4,
|
|
.configure = uninorth_configure,
|
|
.fetch_size = uninorth_fetch_size,
|
|
.cleanup = uninorth_cleanup,
|
|
.tlb_flush = uninorth_tlbflush,
|
|
.mask_memory = agp_generic_mask_memory,
|
|
.masks = NULL,
|
|
.cache_flush = null_cache_flush,
|
|
.agp_enable = uninorth_agp_enable,
|
|
.create_gatt_table = uninorth_create_gatt_table,
|
|
.free_gatt_table = uninorth_free_gatt_table,
|
|
.insert_memory = uninorth_insert_memory,
|
|
.remove_memory = agp_generic_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,
|
|
.cant_use_aperture = 1,
|
|
};
|
|
|
|
static struct agp_device_ids uninorth_agp_device_ids[] __devinitdata = {
|
|
{
|
|
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP,
|
|
.chipset_name = "UniNorth",
|
|
},
|
|
{
|
|
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP_P,
|
|
.chipset_name = "UniNorth/Pangea",
|
|
},
|
|
{
|
|
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP15,
|
|
.chipset_name = "UniNorth 1.5",
|
|
},
|
|
{
|
|
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP2,
|
|
.chipset_name = "UniNorth 2",
|
|
},
|
|
};
|
|
|
|
static int __devinit agp_uninorth_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct agp_device_ids *devs = uninorth_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 == 0)
|
|
return -ENODEV;
|
|
|
|
/* probe for known chipsets */
|
|
for (j = 0; devs[j].chipset_name != NULL; ++j) {
|
|
if (pdev->device == devs[j].device_id) {
|
|
printk(KERN_INFO PFX "Detected Apple %s chipset\n",
|
|
devs[j].chipset_name);
|
|
goto found;
|
|
}
|
|
}
|
|
|
|
printk(KERN_ERR PFX "Unsupported Apple chipset (device id: %04x).\n",
|
|
pdev->device);
|
|
return -ENODEV;
|
|
|
|
found:
|
|
bridge = agp_alloc_bridge();
|
|
if (!bridge)
|
|
return -ENOMEM;
|
|
|
|
bridge->driver = &uninorth_agp_driver;
|
|
bridge->dev = pdev;
|
|
bridge->capndx = cap_ptr;
|
|
|
|
/* Fill in the mode register */
|
|
pci_read_config_dword(pdev, cap_ptr+PCI_AGP_STATUS, &bridge->mode);
|
|
|
|
pci_set_drvdata(pdev, bridge);
|
|
return agp_add_bridge(bridge);
|
|
}
|
|
|
|
static void __devexit agp_uninorth_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_uninorth_pci_table[] = {
|
|
{
|
|
.class = (PCI_CLASS_BRIDGE_HOST << 8),
|
|
.class_mask = ~0,
|
|
.vendor = PCI_VENDOR_ID_APPLE,
|
|
.device = PCI_ANY_ID,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, agp_uninorth_pci_table);
|
|
|
|
static struct pci_driver agp_uninorth_pci_driver = {
|
|
.name = "agpgart-uninorth",
|
|
.id_table = agp_uninorth_pci_table,
|
|
.probe = agp_uninorth_probe,
|
|
.remove = agp_uninorth_remove,
|
|
};
|
|
|
|
static int __init agp_uninorth_init(void)
|
|
{
|
|
return pci_module_init(&agp_uninorth_pci_driver);
|
|
}
|
|
|
|
static void __exit agp_uninorth_cleanup(void)
|
|
{
|
|
pci_unregister_driver(&agp_uninorth_pci_driver);
|
|
}
|
|
|
|
module_init(agp_uninorth_init);
|
|
module_exit(agp_uninorth_cleanup);
|
|
|
|
MODULE_AUTHOR("Ben Herrenschmidt & Paul Mackerras");
|
|
MODULE_LICENSE("GPL");
|