mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
340 lines
7.7 KiB
C
340 lines
7.7 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2003-2005 Silicon Graphics, Inc. All Rights Reserved.
|
|
*/
|
|
|
|
/*
|
|
* SGI TIOCA AGPGART routines.
|
|
*
|
|
*/
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/agp_backend.h>
|
|
#include <asm/sn/addrs.h>
|
|
#include <asm/sn/io.h>
|
|
#include <asm/sn/pcidev.h>
|
|
#include <asm/sn/pcibus_provider_defs.h>
|
|
#include <asm/sn/tioca_provider.h>
|
|
#include "agp.h"
|
|
|
|
extern int agp_memory_reserved;
|
|
extern uint32_t tioca_gart_found;
|
|
extern struct list_head tioca_list;
|
|
static struct agp_bridge_data **sgi_tioca_agp_bridges;
|
|
|
|
/*
|
|
* The aperature size and related information is set up at TIOCA init time.
|
|
* Values for this table will be extracted and filled in at
|
|
* sgi_tioca_fetch_size() time.
|
|
*/
|
|
|
|
static struct aper_size_info_fixed sgi_tioca_sizes[] = {
|
|
{0, 0, 0},
|
|
};
|
|
|
|
static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
|
|
{
|
|
struct page *page;
|
|
int nid;
|
|
struct tioca_kernel *info =
|
|
(struct tioca_kernel *)bridge->dev_private_data;
|
|
|
|
nid = info->ca_closest_node;
|
|
page = alloc_pages_node(nid, GFP_KERNEL, 0);
|
|
if (page == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
get_page(page);
|
|
SetPageLocked(page);
|
|
atomic_inc(&agp_bridge->current_memory_agp);
|
|
return page_address(page);
|
|
}
|
|
|
|
/*
|
|
* Flush GART tlb's. Cannot selectively flush based on memory so the mem
|
|
* arg is ignored.
|
|
*/
|
|
|
|
static void sgi_tioca_tlbflush(struct agp_memory *mem)
|
|
{
|
|
tioca_tlbflush(mem->bridge->dev_private_data);
|
|
}
|
|
|
|
/*
|
|
* Given an address of a host physical page, turn it into a valid gart
|
|
* entry.
|
|
*/
|
|
static unsigned long
|
|
sgi_tioca_mask_memory(struct agp_bridge_data *bridge,
|
|
unsigned long addr, int type)
|
|
{
|
|
return tioca_physpage_to_gart(addr);
|
|
}
|
|
|
|
static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode)
|
|
{
|
|
tioca_fastwrite_enable(bridge->dev_private_data);
|
|
}
|
|
|
|
/*
|
|
* sgi_tioca_configure() doesn't have anything to do since the base CA driver
|
|
* has alreay set up the GART.
|
|
*/
|
|
|
|
static int sgi_tioca_configure(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Determine gfx aperature size. This has already been determined by the
|
|
* CA driver init, so just need to set agp_bridge values accordingly.
|
|
*/
|
|
|
|
static int sgi_tioca_fetch_size(void)
|
|
{
|
|
struct tioca_kernel *info =
|
|
(struct tioca_kernel *)agp_bridge->dev_private_data;
|
|
|
|
sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1);
|
|
sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries;
|
|
|
|
return sgi_tioca_sizes[0].size;
|
|
}
|
|
|
|
static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge)
|
|
{
|
|
struct tioca_kernel *info =
|
|
(struct tioca_kernel *)bridge->dev_private_data;
|
|
|
|
bridge->gatt_table_real = (u32 *) info->ca_gfxgart;
|
|
bridge->gatt_table = bridge->gatt_table_real;
|
|
bridge->gatt_bus_addr = info->ca_gfxgart_base;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
|
|
int type)
|
|
{
|
|
int num_entries;
|
|
size_t i;
|
|
off_t j;
|
|
void *temp;
|
|
struct agp_bridge_data *bridge;
|
|
u64 *table;
|
|
|
|
bridge = mem->bridge;
|
|
if (!bridge)
|
|
return -EINVAL;
|
|
|
|
table = (u64 *)bridge->gatt_table;
|
|
|
|
temp = bridge->current_size;
|
|
|
|
switch (bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
num_entries = A_SIZE_8(temp)->num_entries;
|
|
break;
|
|
case U16_APER_SIZE:
|
|
num_entries = A_SIZE_16(temp)->num_entries;
|
|
break;
|
|
case U32_APER_SIZE:
|
|
num_entries = A_SIZE_32(temp)->num_entries;
|
|
break;
|
|
case FIXED_APER_SIZE:
|
|
num_entries = A_SIZE_FIX(temp)->num_entries;
|
|
break;
|
|
case LVL2_APER_SIZE:
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
num_entries = 0;
|
|
break;
|
|
}
|
|
|
|
num_entries -= agp_memory_reserved / PAGE_SIZE;
|
|
if (num_entries < 0)
|
|
num_entries = 0;
|
|
|
|
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)) {
|
|
if (table[j])
|
|
return -EBUSY;
|
|
j++;
|
|
}
|
|
|
|
if (mem->is_flushed == FALSE) {
|
|
bridge->driver->cache_flush();
|
|
mem->is_flushed = TRUE;
|
|
}
|
|
|
|
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
|
|
table[j] =
|
|
bridge->driver->mask_memory(bridge, mem->memory[i],
|
|
mem->type);
|
|
}
|
|
|
|
bridge->driver->tlb_flush(mem);
|
|
return 0;
|
|
}
|
|
|
|
static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
|
|
int type)
|
|
{
|
|
size_t i;
|
|
struct agp_bridge_data *bridge;
|
|
u64 *table;
|
|
|
|
bridge = mem->bridge;
|
|
if (!bridge)
|
|
return -EINVAL;
|
|
|
|
if (type != 0 || mem->type != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
table = (u64 *)bridge->gatt_table;
|
|
|
|
for (i = pg_start; i < (mem->page_count + pg_start); i++) {
|
|
table[i] = 0;
|
|
}
|
|
|
|
bridge->driver->tlb_flush(mem);
|
|
return 0;
|
|
}
|
|
|
|
static void sgi_tioca_cache_flush(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Cleanup. Nothing to do as the CA driver owns the GART.
|
|
*/
|
|
|
|
static void sgi_tioca_cleanup(void)
|
|
{
|
|
}
|
|
|
|
static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev)
|
|
{
|
|
struct agp_bridge_data *bridge;
|
|
|
|
list_for_each_entry(bridge, &agp_bridges, list) {
|
|
if (bridge->dev->bus == pdev->bus)
|
|
break;
|
|
}
|
|
return bridge;
|
|
}
|
|
|
|
struct agp_bridge_driver sgi_tioca_driver = {
|
|
.owner = THIS_MODULE,
|
|
.size_type = U16_APER_SIZE,
|
|
.configure = sgi_tioca_configure,
|
|
.fetch_size = sgi_tioca_fetch_size,
|
|
.cleanup = sgi_tioca_cleanup,
|
|
.tlb_flush = sgi_tioca_tlbflush,
|
|
.mask_memory = sgi_tioca_mask_memory,
|
|
.agp_enable = sgi_tioca_agp_enable,
|
|
.cache_flush = sgi_tioca_cache_flush,
|
|
.create_gatt_table = sgi_tioca_create_gatt_table,
|
|
.free_gatt_table = sgi_tioca_free_gatt_table,
|
|
.insert_memory = sgi_tioca_insert_memory,
|
|
.remove_memory = sgi_tioca_remove_memory,
|
|
.alloc_by_type = agp_generic_alloc_by_type,
|
|
.free_by_type = agp_generic_free_by_type,
|
|
.agp_alloc_page = sgi_tioca_alloc_page,
|
|
.agp_destroy_page = agp_generic_destroy_page,
|
|
.cant_use_aperture = 1,
|
|
.needs_scratch_page = 0,
|
|
.num_aperture_sizes = 1,
|
|
};
|
|
|
|
static int __devinit agp_sgi_init(void)
|
|
{
|
|
unsigned int j;
|
|
struct tioca_kernel *info;
|
|
struct pci_dev *pdev = NULL;
|
|
|
|
if (tioca_gart_found)
|
|
printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n");
|
|
else
|
|
return 0;
|
|
|
|
sgi_tioca_agp_bridges =
|
|
(struct agp_bridge_data **)kmalloc(tioca_gart_found *
|
|
sizeof(struct agp_bridge_data *),
|
|
GFP_KERNEL);
|
|
|
|
j = 0;
|
|
list_for_each_entry(info, &tioca_list, ca_list) {
|
|
struct list_head *tmp;
|
|
if (list_empty(info->ca_devices))
|
|
continue;
|
|
list_for_each(tmp, info->ca_devices) {
|
|
u8 cap_ptr;
|
|
pdev = pci_dev_b(tmp);
|
|
if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8))
|
|
continue;
|
|
cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
|
|
if (!cap_ptr)
|
|
continue;
|
|
}
|
|
sgi_tioca_agp_bridges[j] = agp_alloc_bridge();
|
|
printk(KERN_INFO PFX "bridge %d = 0x%p\n", j,
|
|
sgi_tioca_agp_bridges[j]);
|
|
if (sgi_tioca_agp_bridges[j]) {
|
|
sgi_tioca_agp_bridges[j]->dev = pdev;
|
|
sgi_tioca_agp_bridges[j]->dev_private_data = info;
|
|
sgi_tioca_agp_bridges[j]->driver = &sgi_tioca_driver;
|
|
sgi_tioca_agp_bridges[j]->gart_bus_addr =
|
|
info->ca_gfxap_base;
|
|
sgi_tioca_agp_bridges[j]->mode = (0x7D << 24) | /* 126 requests */
|
|
(0x1 << 9) | /* SBA supported */
|
|
(0x1 << 5) | /* 64-bit addresses supported */
|
|
(0x1 << 4) | /* FW supported */
|
|
(0x1 << 3) | /* AGP 3.0 mode */
|
|
0x2; /* 8x transfer only */
|
|
sgi_tioca_agp_bridges[j]->current_size =
|
|
sgi_tioca_agp_bridges[j]->previous_size =
|
|
(void *)&sgi_tioca_sizes[0];
|
|
agp_add_bridge(sgi_tioca_agp_bridges[j]);
|
|
}
|
|
j++;
|
|
}
|
|
|
|
agp_find_bridge = &sgi_tioca_find_bridge;
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit agp_sgi_cleanup(void)
|
|
{
|
|
if(sgi_tioca_agp_bridges)
|
|
kfree(sgi_tioca_agp_bridges);
|
|
sgi_tioca_agp_bridges=NULL;
|
|
}
|
|
|
|
module_init(agp_sgi_init);
|
|
module_exit(agp_sgi_cleanup);
|
|
|
|
MODULE_LICENSE("GPL and additional rights");
|