aboutsummaryrefslogtreecommitdiff
path: root/drivers/char
diff options
context:
space:
mode:
authorAndi Kleen <ak@suse.de>2006-06-26 13:56:40 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 10:48:15 -0700
commita32073bffc656ca4bde6002b6cf7c1a8e0e22712 (patch)
tree5ddcd3107eca8807685a19490c2c849d728a51a6 /drivers/char
parent7c2d9cd218916276e52a5dae827b84a159fe5c96 (diff)
[PATCH] x86_64: Clean and enhance up K8 northbridge access code
- Factor out the duplicated access/cache code into a single file * Shared between i386/x86-64. - Share flush code between AGP and IOMMU * Fix a bug: AGP didn't wait for end of flush before - Drop 8 northbridges limit and allocate dynamically - Add lock to serialize AGP and IOMMU GART flushes - Add PCI ID for next AMD northbridge - Random related cleanups The old K8 NUMA discovery code is unchanged. New systems should all use SRAT for this. Cc: "Navin Boppuri" <navin.boppuri@newisys.com> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/agp/amd64-agp.c77
1 files changed, 25 insertions, 52 deletions
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index ac3c33a2e37..229d015757f 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -15,11 +15,9 @@
#include <linux/agp_backend.h>
#include <linux/mmzone.h>
#include <asm/page.h> /* PAGE_SIZE */
+#include <asm/k8.h>
#include "agp.h"
-/* Will need to be increased if AMD64 ever goes >8-way. */
-#define MAX_HAMMER_GARTS 8
-
/* PTE bits. */
#define GPTE_VALID 1
#define GPTE_COHERENT 2
@@ -53,28 +51,12 @@
#define ULI_X86_64_HTT_FEA_REG 0x50
#define ULI_X86_64_ENU_SCR_REG 0x54
-static int nr_garts;
-static struct pci_dev * hammers[MAX_HAMMER_GARTS];
-
static struct resource *aperture_resource;
static int __initdata agp_try_unsupported = 1;
-#define for_each_nb() for(gart_iterator=0;gart_iterator<nr_garts;gart_iterator++)
-
-static void flush_amd64_tlb(struct pci_dev *dev)
-{
- u32 tmp;
-
- pci_read_config_dword (dev, AMD64_GARTCACHECTL, &tmp);
- tmp |= INVGART;
- pci_write_config_dword (dev, AMD64_GARTCACHECTL, tmp);
-}
-
static void amd64_tlbflush(struct agp_memory *temp)
{
- int gart_iterator;
- for_each_nb()
- flush_amd64_tlb(hammers[gart_iterator]);
+ k8_flush_garts();
}
static int amd64_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
@@ -153,7 +135,7 @@ static int amd64_fetch_size(void)
u32 temp;
struct aper_size_info_32 *values;
- dev = hammers[0];
+ dev = k8_northbridges[0];
if (dev==NULL)
return 0;
@@ -201,9 +183,6 @@ static u64 amd64_configure (struct pci_dev *hammer, u64 gatt_table)
tmp &= ~(DISGARTCPU | DISGARTIO);
pci_write_config_dword(hammer, AMD64_GARTAPERTURECTL, tmp);
- /* keep CPU's coherent. */
- flush_amd64_tlb (hammer);
-
return aper_base;
}
@@ -222,13 +201,14 @@ static struct aper_size_info_32 amd_8151_sizes[7] =
static int amd_8151_configure(void)
{
unsigned long gatt_bus = virt_to_gart(agp_bridge->gatt_table_real);
- int gart_iterator;
+ int i;
/* Configure AGP regs in each x86-64 host bridge. */
- for_each_nb() {
+ for (i = 0; i < num_k8_northbridges; i++) {
agp_bridge->gart_bus_addr =
- amd64_configure(hammers[gart_iterator],gatt_bus);
+ amd64_configure(k8_northbridges[i], gatt_bus);
}
+ k8_flush_garts();
return 0;
}
@@ -236,12 +216,13 @@ static int amd_8151_configure(void)
static void amd64_cleanup(void)
{
u32 tmp;
- int gart_iterator;
- for_each_nb() {
+ int i;
+ for (i = 0; i < num_k8_northbridges; i++) {
+ struct pci_dev *dev = k8_northbridges[i];
/* disable gart translation */
- pci_read_config_dword (hammers[gart_iterator], AMD64_GARTAPERTURECTL, &tmp);
+ pci_read_config_dword (dev, AMD64_GARTAPERTURECTL, &tmp);
tmp &= ~AMD64_GARTEN;
- pci_write_config_dword (hammers[gart_iterator], AMD64_GARTAPERTURECTL, tmp);
+ pci_write_config_dword (dev, AMD64_GARTAPERTURECTL, tmp);
}
}
@@ -361,17 +342,15 @@ static __devinit int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp,
static __devinit int cache_nbs (struct pci_dev *pdev, u32 cap_ptr)
{
- struct pci_dev *loop_dev = NULL;
- int i = 0;
-
- /* cache pci_devs of northbridges. */
- while ((loop_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1103, loop_dev))
- != NULL) {
- if (i == MAX_HAMMER_GARTS) {
- printk(KERN_ERR PFX "Too many northbridges for AGP\n");
- return -1;
- }
- if (fix_northbridge(loop_dev, pdev, cap_ptr) < 0) {
+ int i;
+
+ if (cache_k8_northbridges() < 0)
+ return -ENODEV;
+
+ i = 0;
+ for (i = 0; i < num_k8_northbridges; i++) {
+ struct pci_dev *dev = k8_northbridges[i];
+ if (fix_northbridge(dev, pdev, cap_ptr) < 0) {
printk(KERN_ERR PFX "No usable aperture found.\n");
#ifdef __x86_64__
/* should port this to i386 */
@@ -379,10 +358,8 @@ static __devinit int cache_nbs (struct pci_dev *pdev, u32 cap_ptr)
#endif
return -1;
}
- hammers[i++] = loop_dev;
}
- nr_garts = i;
- return i == 0 ? -1 : 0;
+ return 0;
}
/* Handle AMD 8151 quirks */
@@ -450,7 +427,7 @@ static int __devinit uli_agp_init(struct pci_dev *pdev)
}
/* shadow x86-64 registers into ULi registers */
- pci_read_config_dword (hammers[0], AMD64_GARTAPERTUREBASE, &httfea);
+ pci_read_config_dword (k8_northbridges[0], AMD64_GARTAPERTUREBASE, &httfea);
/* if x86-64 aperture base is beyond 4G, exit here */
if ((httfea & 0x7fff) >> (32 - 25))
@@ -513,7 +490,7 @@ static int __devinit nforce3_agp_init(struct pci_dev *pdev)
pci_write_config_dword(dev1, NVIDIA_X86_64_1_APSIZE, tmp);
/* shadow x86-64 registers into NVIDIA registers */
- pci_read_config_dword (hammers[0], AMD64_GARTAPERTUREBASE, &apbase);
+ pci_read_config_dword (k8_northbridges[0], AMD64_GARTAPERTUREBASE, &apbase);
/* if x86-64 aperture base is beyond 4G, exit here */
if ( (apbase & 0x7fff) >> (32 - 25) ) {
@@ -754,10 +731,6 @@ static struct pci_driver agp_amd64_pci_driver = {
int __init agp_amd64_init(void)
{
int err = 0;
- static struct pci_device_id amd64nb[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1103) },
- { },
- };
if (agp_off)
return -EINVAL;
@@ -774,7 +747,7 @@ int __init agp_amd64_init(void)
}
/* First check that we have at least one AMD64 NB */
- if (!pci_dev_present(amd64nb))
+ if (!pci_dev_present(k8_nb_ids))
return -ENODEV;
/* Look for any AGP bridge */