569 lines
15 KiB
C
569 lines
15 KiB
C
/*
|
|
* Serverworks AGPGART routines.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/agp_backend.h>
|
|
#include "agp.h"
|
|
|
|
#define SVWRKS_COMMAND 0x04
|
|
#define SVWRKS_APSIZE 0x10
|
|
#define SVWRKS_MMBASE 0x14
|
|
#define SVWRKS_CACHING 0x4b
|
|
#define SVWRKS_AGP_ENABLE 0x60
|
|
#define SVWRKS_FEATURE 0x68
|
|
|
|
#define SVWRKS_SIZE_MASK 0xfe000000
|
|
|
|
/* Memory mapped registers */
|
|
#define SVWRKS_GART_CACHE 0x02
|
|
#define SVWRKS_GATTBASE 0x04
|
|
#define SVWRKS_TLBFLUSH 0x10
|
|
#define SVWRKS_POSTFLUSH 0x14
|
|
#define SVWRKS_DIRFLUSH 0x0c
|
|
|
|
|
|
struct serverworks_page_map {
|
|
unsigned long *real;
|
|
unsigned long __iomem *remapped;
|
|
};
|
|
|
|
static struct _serverworks_private {
|
|
struct pci_dev *svrwrks_dev; /* device one */
|
|
volatile u8 __iomem *registers;
|
|
struct serverworks_page_map **gatt_pages;
|
|
int num_tables;
|
|
struct serverworks_page_map scratch_dir;
|
|
|
|
int gart_addr_ofs;
|
|
int mm_addr_ofs;
|
|
} serverworks_private;
|
|
|
|
static int serverworks_create_page_map(struct serverworks_page_map *page_map)
|
|
{
|
|
int i;
|
|
|
|
page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
|
|
if (page_map->real == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
SetPageReserved(virt_to_page(page_map->real));
|
|
global_cache_flush();
|
|
page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
|
|
PAGE_SIZE);
|
|
if (page_map->remapped == NULL) {
|
|
ClearPageReserved(virt_to_page(page_map->real));
|
|
free_page((unsigned long) page_map->real);
|
|
page_map->real = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
global_cache_flush();
|
|
|
|
for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++)
|
|
writel(agp_bridge->scratch_page, page_map->remapped+i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void serverworks_free_page_map(struct serverworks_page_map *page_map)
|
|
{
|
|
iounmap(page_map->remapped);
|
|
ClearPageReserved(virt_to_page(page_map->real));
|
|
free_page((unsigned long) page_map->real);
|
|
}
|
|
|
|
static void serverworks_free_gatt_pages(void)
|
|
{
|
|
int i;
|
|
struct serverworks_page_map **tables;
|
|
struct serverworks_page_map *entry;
|
|
|
|
tables = serverworks_private.gatt_pages;
|
|
for (i = 0; i < serverworks_private.num_tables; i++) {
|
|
entry = tables[i];
|
|
if (entry != NULL) {
|
|
if (entry->real != NULL) {
|
|
serverworks_free_page_map(entry);
|
|
}
|
|
kfree(entry);
|
|
}
|
|
}
|
|
kfree(tables);
|
|
}
|
|
|
|
static int serverworks_create_gatt_pages(int nr_tables)
|
|
{
|
|
struct serverworks_page_map **tables;
|
|
struct serverworks_page_map *entry;
|
|
int retval = 0;
|
|
int i;
|
|
|
|
tables = kzalloc((nr_tables + 1) * sizeof(struct serverworks_page_map *),
|
|
GFP_KERNEL);
|
|
if (tables == NULL)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < nr_tables; i++) {
|
|
entry = kzalloc(sizeof(struct serverworks_page_map), GFP_KERNEL);
|
|
if (entry == NULL) {
|
|
retval = -ENOMEM;
|
|
break;
|
|
}
|
|
tables[i] = entry;
|
|
retval = serverworks_create_page_map(entry);
|
|
if (retval != 0) break;
|
|
}
|
|
serverworks_private.num_tables = nr_tables;
|
|
serverworks_private.gatt_pages = tables;
|
|
|
|
if (retval != 0) serverworks_free_gatt_pages();
|
|
|
|
return retval;
|
|
}
|
|
|
|
#define SVRWRKS_GET_GATT(addr) (serverworks_private.gatt_pages[\
|
|
GET_PAGE_DIR_IDX(addr)]->remapped)
|
|
|
|
#ifndef GET_PAGE_DIR_OFF
|
|
#define GET_PAGE_DIR_OFF(addr) (addr >> 22)
|
|
#endif
|
|
|
|
#ifndef GET_PAGE_DIR_IDX
|
|
#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
|
|
GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
|
|
#endif
|
|
|
|
#ifndef GET_GATT_OFF
|
|
#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
|
|
#endif
|
|
|
|
static int serverworks_create_gatt_table(struct agp_bridge_data *bridge)
|
|
{
|
|
struct aper_size_info_lvl2 *value;
|
|
struct serverworks_page_map page_dir;
|
|
int retval;
|
|
u32 temp;
|
|
int i;
|
|
|
|
value = A_SIZE_LVL2(agp_bridge->current_size);
|
|
retval = serverworks_create_page_map(&page_dir);
|
|
if (retval != 0) {
|
|
return retval;
|
|
}
|
|
retval = serverworks_create_page_map(&serverworks_private.scratch_dir);
|
|
if (retval != 0) {
|
|
serverworks_free_page_map(&page_dir);
|
|
return retval;
|
|
}
|
|
/* Create a fake scratch directory */
|
|
for (i = 0; i < 1024; i++) {
|
|
writel(agp_bridge->scratch_page, serverworks_private.scratch_dir.remapped+i);
|
|
writel(virt_to_gart(serverworks_private.scratch_dir.real) | 1, page_dir.remapped+i);
|
|
}
|
|
|
|
retval = serverworks_create_gatt_pages(value->num_entries / 1024);
|
|
if (retval != 0) {
|
|
serverworks_free_page_map(&page_dir);
|
|
serverworks_free_page_map(&serverworks_private.scratch_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);
|
|
|
|
/* 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,serverworks_private.gart_addr_ofs,&temp);
|
|
agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
|
|
|
|
/* Calculate the agp offset */
|
|
for (i = 0; i < value->num_entries / 1024; i++)
|
|
writel(virt_to_gart(serverworks_private.gatt_pages[i]->real)|1, page_dir.remapped+i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int serverworks_free_gatt_table(struct agp_bridge_data *bridge)
|
|
{
|
|
struct serverworks_page_map page_dir;
|
|
|
|
page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
|
|
page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
|
|
|
|
serverworks_free_gatt_pages();
|
|
serverworks_free_page_map(&page_dir);
|
|
serverworks_free_page_map(&serverworks_private.scratch_dir);
|
|
return 0;
|
|
}
|
|
|
|
static int serverworks_fetch_size(void)
|
|
{
|
|
int i;
|
|
u32 temp;
|
|
u32 temp2;
|
|
struct aper_size_info_lvl2 *values;
|
|
|
|
values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
|
|
pci_read_config_dword(agp_bridge->dev,serverworks_private.gart_addr_ofs,&temp);
|
|
pci_write_config_dword(agp_bridge->dev,serverworks_private.gart_addr_ofs,
|
|
SVWRKS_SIZE_MASK);
|
|
pci_read_config_dword(agp_bridge->dev,serverworks_private.gart_addr_ofs,&temp2);
|
|
pci_write_config_dword(agp_bridge->dev,serverworks_private.gart_addr_ofs,temp);
|
|
temp2 &= SVWRKS_SIZE_MASK;
|
|
|
|
for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
|
|
if (temp2 == 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;
|
|
}
|
|
|
|
/*
|
|
* This routine could be implemented by taking the addresses
|
|
* written to the GATT, and flushing them individually. However
|
|
* currently it just flushes the whole table. Which is probably
|
|
* more efficent, since agp_memory blocks can be a large number of
|
|
* entries.
|
|
*/
|
|
static void serverworks_tlbflush(struct agp_memory *temp)
|
|
{
|
|
unsigned long timeout;
|
|
|
|
writeb(1, serverworks_private.registers+SVWRKS_POSTFLUSH);
|
|
timeout = jiffies + 3*HZ;
|
|
while (readb(serverworks_private.registers+SVWRKS_POSTFLUSH) == 1) {
|
|
cpu_relax();
|
|
if (time_after(jiffies, timeout)) {
|
|
printk(KERN_ERR PFX "TLB post flush took more than 3 seconds\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
writel(1, serverworks_private.registers+SVWRKS_DIRFLUSH);
|
|
timeout = jiffies + 3*HZ;
|
|
while (readl(serverworks_private.registers+SVWRKS_DIRFLUSH) == 1) {
|
|
cpu_relax();
|
|
if (time_after(jiffies, timeout)) {
|
|
printk(KERN_ERR PFX "TLB Dir flush took more than 3 seconds\n");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int serverworks_configure(void)
|
|
{
|
|
struct aper_size_info_lvl2 *current_size;
|
|
u32 temp;
|
|
u8 enable_reg;
|
|
u16 cap_reg;
|
|
|
|
current_size = A_SIZE_LVL2(agp_bridge->current_size);
|
|
|
|
/* Get the memory mapped registers */
|
|
pci_read_config_dword(agp_bridge->dev, serverworks_private.mm_addr_ofs, &temp);
|
|
temp = (temp & PCI_BASE_ADDRESS_MEM_MASK);
|
|
serverworks_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
|
|
if (!serverworks_private.registers) {
|
|
printk (KERN_ERR PFX "Unable to ioremap() memory.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
writeb(0xA, serverworks_private.registers+SVWRKS_GART_CACHE);
|
|
readb(serverworks_private.registers+SVWRKS_GART_CACHE); /* PCI Posting. */
|
|
|
|
writel(agp_bridge->gatt_bus_addr, serverworks_private.registers+SVWRKS_GATTBASE);
|
|
readl(serverworks_private.registers+SVWRKS_GATTBASE); /* PCI Posting. */
|
|
|
|
cap_reg = readw(serverworks_private.registers+SVWRKS_COMMAND);
|
|
cap_reg &= ~0x0007;
|
|
cap_reg |= 0x4;
|
|
writew(cap_reg, serverworks_private.registers+SVWRKS_COMMAND);
|
|
readw(serverworks_private.registers+SVWRKS_COMMAND);
|
|
|
|
pci_read_config_byte(serverworks_private.svrwrks_dev,SVWRKS_AGP_ENABLE, &enable_reg);
|
|
enable_reg |= 0x1; /* Agp Enable bit */
|
|
pci_write_config_byte(serverworks_private.svrwrks_dev,SVWRKS_AGP_ENABLE, enable_reg);
|
|
serverworks_tlbflush(NULL);
|
|
|
|
agp_bridge->capndx = pci_find_capability(serverworks_private.svrwrks_dev, PCI_CAP_ID_AGP);
|
|
|
|
/* Fill in the mode register */
|
|
pci_read_config_dword(serverworks_private.svrwrks_dev,
|
|
agp_bridge->capndx+PCI_AGP_STATUS, &agp_bridge->mode);
|
|
|
|
pci_read_config_byte(agp_bridge->dev, SVWRKS_CACHING, &enable_reg);
|
|
enable_reg &= ~0x3;
|
|
pci_write_config_byte(agp_bridge->dev, SVWRKS_CACHING, enable_reg);
|
|
|
|
pci_read_config_byte(agp_bridge->dev, SVWRKS_FEATURE, &enable_reg);
|
|
enable_reg |= (1<<6);
|
|
pci_write_config_byte(agp_bridge->dev,SVWRKS_FEATURE, enable_reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void serverworks_cleanup(void)
|
|
{
|
|
iounmap((void __iomem *) serverworks_private.registers);
|
|
}
|
|
|
|
static int serverworks_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 = SVRWRKS_GET_GATT(addr);
|
|
if (!PGE_EMPTY(agp_bridge, readl(cur_gatt+GET_GATT_OFF(addr))))
|
|
return -EBUSY;
|
|
j++;
|
|
}
|
|
|
|
if (mem->is_flushed == FALSE) {
|
|
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 = SVRWRKS_GET_GATT(addr);
|
|
writel(agp_bridge->driver->mask_memory(agp_bridge, mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
|
|
}
|
|
serverworks_tlbflush(mem);
|
|
return 0;
|
|
}
|
|
|
|
static int serverworks_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;
|
|
}
|
|
|
|
global_cache_flush();
|
|
serverworks_tlbflush(mem);
|
|
|
|
for (i = pg_start; i < (mem->page_count + pg_start); i++) {
|
|
addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
|
|
cur_gatt = SVRWRKS_GET_GATT(addr);
|
|
writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
|
|
}
|
|
|
|
serverworks_tlbflush(mem);
|
|
return 0;
|
|
}
|
|
|
|
static struct gatt_mask serverworks_masks[] =
|
|
{
|
|
{.mask = 1, .type = 0}
|
|
};
|
|
|
|
static struct aper_size_info_lvl2 serverworks_sizes[7] =
|
|
{
|
|
{2048, 524288, 0x80000000},
|
|
{1024, 262144, 0xc0000000},
|
|
{512, 131072, 0xe0000000},
|
|
{256, 65536, 0xf0000000},
|
|
{128, 32768, 0xf8000000},
|
|
{64, 16384, 0xfc000000},
|
|
{32, 8192, 0xfe000000}
|
|
};
|
|
|
|
static void serverworks_agp_enable(struct agp_bridge_data *bridge, u32 mode)
|
|
{
|
|
u32 command;
|
|
|
|
pci_read_config_dword(serverworks_private.svrwrks_dev,
|
|
bridge->capndx + PCI_AGP_STATUS,
|
|
&command);
|
|
|
|
command = agp_collect_device_status(bridge, mode, command);
|
|
|
|
command &= ~0x10; /* disable FW */
|
|
command &= ~0x08;
|
|
|
|
command |= 0x100;
|
|
|
|
pci_write_config_dword(serverworks_private.svrwrks_dev,
|
|
bridge->capndx + PCI_AGP_COMMAND,
|
|
command);
|
|
|
|
agp_device_command(command, 0);
|
|
}
|
|
|
|
static struct agp_bridge_driver sworks_driver = {
|
|
.owner = THIS_MODULE,
|
|
.aperture_sizes = serverworks_sizes,
|
|
.size_type = LVL2_APER_SIZE,
|
|
.num_aperture_sizes = 7,
|
|
.configure = serverworks_configure,
|
|
.fetch_size = serverworks_fetch_size,
|
|
.cleanup = serverworks_cleanup,
|
|
.tlb_flush = serverworks_tlbflush,
|
|
.mask_memory = agp_generic_mask_memory,
|
|
.masks = serverworks_masks,
|
|
.agp_enable = serverworks_agp_enable,
|
|
.cache_flush = global_cache_flush,
|
|
.create_gatt_table = serverworks_create_gatt_table,
|
|
.free_gatt_table = serverworks_free_gatt_table,
|
|
.insert_memory = serverworks_insert_memory,
|
|
.remove_memory = serverworks_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 int __devinit agp_serverworks_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct agp_bridge_data *bridge;
|
|
struct pci_dev *bridge_dev;
|
|
u32 temp, temp2;
|
|
u8 cap_ptr = 0;
|
|
|
|
/* Everything is on func 1 here so we are hardcoding function one */
|
|
bridge_dev = pci_find_slot((unsigned int)pdev->bus->number,
|
|
PCI_DEVFN(0, 1));
|
|
if (!bridge_dev) {
|
|
printk(KERN_INFO PFX "Detected a Serverworks chipset "
|
|
"but could not find the secondary device.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
|
|
|
|
switch (pdev->device) {
|
|
case 0x0006:
|
|
printk (KERN_ERR PFX "ServerWorks CNB20HE is unsupported due to lack of documentation.\n");
|
|
return -ENODEV;
|
|
|
|
case PCI_DEVICE_ID_SERVERWORKS_HE:
|
|
case PCI_DEVICE_ID_SERVERWORKS_LE:
|
|
case 0x0007:
|
|
break;
|
|
|
|
default:
|
|
if (cap_ptr)
|
|
printk(KERN_ERR PFX "Unsupported Serverworks chipset "
|
|
"(device id: %04x)\n", pdev->device);
|
|
return -ENODEV;
|
|
}
|
|
|
|
serverworks_private.svrwrks_dev = bridge_dev;
|
|
serverworks_private.gart_addr_ofs = 0x10;
|
|
|
|
pci_read_config_dword(pdev, SVWRKS_APSIZE, &temp);
|
|
if (temp & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
pci_read_config_dword(pdev, SVWRKS_APSIZE + 4, &temp2);
|
|
if (temp2 != 0) {
|
|
printk(KERN_INFO PFX "Detected 64 bit aperture address, "
|
|
"but top bits are not zero. Disabling agp\n");
|
|
return -ENODEV;
|
|
}
|
|
serverworks_private.mm_addr_ofs = 0x18;
|
|
} else
|
|
serverworks_private.mm_addr_ofs = 0x14;
|
|
|
|
pci_read_config_dword(pdev, serverworks_private.mm_addr_ofs, &temp);
|
|
if (temp & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
pci_read_config_dword(pdev,
|
|
serverworks_private.mm_addr_ofs + 4, &temp2);
|
|
if (temp2 != 0) {
|
|
printk(KERN_INFO PFX "Detected 64 bit MMIO address, "
|
|
"but top bits are not zero. Disabling agp\n");
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
bridge = agp_alloc_bridge();
|
|
if (!bridge)
|
|
return -ENOMEM;
|
|
|
|
bridge->driver = &sworks_driver;
|
|
bridge->dev_private_data = &serverworks_private,
|
|
bridge->dev = pdev;
|
|
|
|
pci_set_drvdata(pdev, bridge);
|
|
return agp_add_bridge(bridge);
|
|
}
|
|
|
|
static void __devexit agp_serverworks_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_serverworks_pci_table[] = {
|
|
{
|
|
.class = (PCI_CLASS_BRIDGE_HOST << 8),
|
|
.class_mask = ~0,
|
|
.vendor = PCI_VENDOR_ID_SERVERWORKS,
|
|
.device = PCI_ANY_ID,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, agp_serverworks_pci_table);
|
|
|
|
static struct pci_driver agp_serverworks_pci_driver = {
|
|
.name = "agpgart-serverworks",
|
|
.id_table = agp_serverworks_pci_table,
|
|
.probe = agp_serverworks_probe,
|
|
.remove = agp_serverworks_remove,
|
|
};
|
|
|
|
static int __init agp_serverworks_init(void)
|
|
{
|
|
if (agp_off)
|
|
return -EINVAL;
|
|
return pci_register_driver(&agp_serverworks_pci_driver);
|
|
}
|
|
|
|
static void __exit agp_serverworks_cleanup(void)
|
|
{
|
|
pci_unregister_driver(&agp_serverworks_pci_driver);
|
|
}
|
|
|
|
module_init(agp_serverworks_init);
|
|
module_exit(agp_serverworks_cleanup);
|
|
|
|
MODULE_LICENSE("GPL and additional rights");
|
|
|