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linux_dsm_epyc7002/drivers/char/agp/amd-k7-agp.c
Kees Cook 6396bb2215 treewide: kzalloc() -> kcalloc() 
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:

        kzalloc(a * b, gfp)

with:
        kcalloc(a * b, gfp)

as well as handling cases of:

        kzalloc(a * b * c, gfp)

with:

        kzalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kzalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kzalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kzalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kzalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kzalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kzalloc
+ kcalloc
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kzalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kzalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kzalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kzalloc(sizeof(THING) * C2, ...)
|
  kzalloc(sizeof(TYPE) * C2, ...)
|
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

569 lines
15 KiB
C
Raw Blame History

/*
* AMD K7 AGPGART routines.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/agp_backend.h>
#include <linux/page-flags.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <asm/set_memory.h>
#include "agp.h"
#define AMD_MMBASE_BAR 1
#define AMD_APSIZE 0xac
#define AMD_MODECNTL 0xb0
#define AMD_MODECNTL2 0xb2
#define AMD_GARTENABLE 0x02 /* In mmio region (16-bit register) */
#define AMD_ATTBASE 0x04 /* In mmio region (32-bit register) */
#define AMD_TLBFLUSH 0x0c /* In mmio region (32-bit register) */
#define AMD_CACHEENTRY 0x10 /* In mmio region (32-bit register) */
static const struct pci_device_id agp_amdk7_pci_table[];
struct amd_page_map {
unsigned long *real;
unsigned long __iomem *remapped;
};
static struct _amd_irongate_private {
volatile u8 __iomem *registers;
struct amd_page_map **gatt_pages;
int num_tables;
} amd_irongate_private;
static int amd_create_page_map(struct amd_page_map *page_map)
{
int i;
page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
if (page_map->real == NULL)
return -ENOMEM;
set_memory_uc((unsigned long)page_map->real, 1);
page_map->remapped = page_map->real;
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 amd_free_page_map(struct amd_page_map *page_map)
{
set_memory_wb((unsigned long)page_map->real, 1);
free_page((unsigned long) page_map->real);
}
static void amd_free_gatt_pages(void)
{
int i;
struct amd_page_map **tables;
struct amd_page_map *entry;
tables = amd_irongate_private.gatt_pages;
for (i = 0; i < amd_irongate_private.num_tables; i++) {
entry = tables[i];
if (entry != NULL) {
if (entry->real != NULL)
amd_free_page_map(entry);
kfree(entry);
}
}
kfree(tables);
amd_irongate_private.gatt_pages = NULL;
}
static int amd_create_gatt_pages(int nr_tables)
{
struct amd_page_map **tables;
struct amd_page_map *entry;
int retval = 0;
int i;
tables = kcalloc(nr_tables + 1, sizeof(struct amd_page_map *),
GFP_KERNEL);
if (tables == NULL)
return -ENOMEM;
for (i = 0; i < nr_tables; i++) {
entry = kzalloc(sizeof(struct amd_page_map), GFP_KERNEL);
tables[i] = entry;
if (entry == NULL) {
retval = -ENOMEM;
break;
}
retval = amd_create_page_map(entry);
if (retval != 0)
break;
}
amd_irongate_private.num_tables = i;
amd_irongate_private.gatt_pages = tables;
if (retval != 0)
amd_free_gatt_pages();
return retval;
}
/* Since we don't need contiguous 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)
#define GET_GATT(addr) (amd_irongate_private.gatt_pages[\
GET_PAGE_DIR_IDX(addr)]->remapped)
static int amd_create_gatt_table(struct agp_bridge_data *bridge)
{
struct aper_size_info_lvl2 *value;
struct amd_page_map page_dir;
unsigned long __iomem *cur_gatt;
unsigned long addr;
int retval;
int i;
value = A_SIZE_LVL2(agp_bridge->current_size);
retval = amd_create_page_map(&page_dir);
if (retval != 0)
return retval;
retval = amd_create_gatt_pages(value->num_entries / 1024);
if (retval != 0) {
amd_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_phys(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
*/
addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
agp_bridge->gart_bus_addr = addr;
/* Calculate the agp offset */
for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
writel(virt_to_phys(amd_irongate_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. */
}
for (i = 0; i < value->num_entries; 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. */
}
return 0;
}
static int amd_free_gatt_table(struct agp_bridge_data *bridge)
{
struct amd_page_map page_dir;
page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
amd_free_gatt_pages();
amd_free_page_map(&page_dir);
return 0;
}
static int amd_irongate_fetch_size(void)
{
int i;
u32 temp;
struct aper_size_info_lvl2 *values;
pci_read_config_dword(agp_bridge->dev, AMD_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 int amd_irongate_configure(void)
{
struct aper_size_info_lvl2 *current_size;
phys_addr_t reg;
u32 temp;
u16 enable_reg;
current_size = A_SIZE_LVL2(agp_bridge->current_size);
if (!amd_irongate_private.registers) {
/* Get the memory mapped registers */
reg = pci_resource_start(agp_bridge->dev, AMD_MMBASE_BAR);
amd_irongate_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
if (!amd_irongate_private.registers)
return -ENOMEM;
}
/* Write out the address of the gatt table */
writel(agp_bridge->gatt_bus_addr, amd_irongate_private.registers+AMD_ATTBASE);
readl(amd_irongate_private.registers+AMD_ATTBASE); /* PCI Posting. */
/* Write the Sync register */
pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL, 0x80);
/* Set indexing mode */
pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL2, 0x00);
/* Write the enable register */
enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE);
enable_reg = (enable_reg | 0x0004);
writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE);
readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */
/* Write out the size register */
pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
temp = (((temp & ~(0x0000000e)) | current_size->size_value) | 1);
pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp);
/* Flush the tlb */
writel(1, amd_irongate_private.registers+AMD_TLBFLUSH);
readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting.*/
return 0;
}
static void amd_irongate_cleanup(void)
{
struct aper_size_info_lvl2 *previous_size;
u32 temp;
u16 enable_reg;
previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE);
enable_reg = (enable_reg & ~(0x0004));
writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE);
readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */
/* Write back the previous size and disable gart translation */
pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp);
temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp);
iounmap((void __iomem *) amd_irongate_private.registers);
}
/*
* 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 efficient, since agp_memory blocks can be a large number of
* entries.
*/
static void amd_irongate_tlbflush(struct agp_memory *temp)
{
writel(1, amd_irongate_private.registers+AMD_TLBFLUSH);
readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting. */
}
static int amd_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 != mem->type ||
agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type))
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) {
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_generic_mask_memory(agp_bridge,
page_to_phys(mem->pages[i]),
mem->type),
cur_gatt+GET_GATT_OFF(addr));
readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
}
amd_irongate_tlbflush(mem);
return 0;
}
static int amd_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
{
int i;
unsigned long __iomem *cur_gatt;
unsigned long addr;
if (type != mem->type ||
agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type))
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. */
}
amd_irongate_tlbflush(mem);
return 0;
}
static const struct aper_size_info_lvl2 amd_irongate_sizes[7] =
{
{2048, 524288, 0x0000000c},
{1024, 262144, 0x0000000a},
{512, 131072, 0x00000008},
{256, 65536, 0x00000006},
{128, 32768, 0x00000004},
{64, 16384, 0x00000002},
{32, 8192, 0x00000000}
};
static const struct gatt_mask amd_irongate_masks[] =
{
{.mask = 1, .type = 0}
};
static const struct agp_bridge_driver amd_irongate_driver = {
.owner = THIS_MODULE,
.aperture_sizes = amd_irongate_sizes,
.size_type = LVL2_APER_SIZE,
.num_aperture_sizes = 7,
.needs_scratch_page = true,
.configure = amd_irongate_configure,
.fetch_size = amd_irongate_fetch_size,
.cleanup = amd_irongate_cleanup,
.tlb_flush = amd_irongate_tlbflush,
.mask_memory = agp_generic_mask_memory,
.masks = amd_irongate_masks,
.agp_enable = agp_generic_enable,
.cache_flush = global_cache_flush,
.create_gatt_table = amd_create_gatt_table,
.free_gatt_table = amd_free_gatt_table,
.insert_memory = amd_insert_memory,
.remove_memory = amd_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_alloc_pages = agp_generic_alloc_pages,
.agp_destroy_page = agp_generic_destroy_page,
.agp_destroy_pages = agp_generic_destroy_pages,
.agp_type_to_mask_type = agp_generic_type_to_mask_type,
};
static struct agp_device_ids amd_agp_device_ids[] =
{
{
.device_id = PCI_DEVICE_ID_AMD_FE_GATE_7006,
.chipset_name = "Irongate",
},
{
.device_id = PCI_DEVICE_ID_AMD_FE_GATE_700E,
.chipset_name = "761",
},
{
.device_id = PCI_DEVICE_ID_AMD_FE_GATE_700C,
.chipset_name = "760MP",
},
{ }, /* dummy final entry, always present */
};
static int agp_amdk7_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
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;
j = ent - agp_amdk7_pci_table;
dev_info(&pdev->dev, "AMD %s chipset\n",
amd_agp_device_ids[j].chipset_name);
bridge = agp_alloc_bridge();
if (!bridge)
return -ENOMEM;
bridge->driver = &amd_irongate_driver;
bridge->dev_private_data = &amd_irongate_private,
bridge->dev = pdev;
bridge->capndx = cap_ptr;
/* 751 Errata (22564_B-1.PDF)
erratum 20: strobe glitch with Nvidia NV10 GeForce cards.
system controller may experience noise due to strong drive strengths
*/
if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_7006) {
struct pci_dev *gfxcard=NULL;
cap_ptr = 0;
while (!cap_ptr) {
gfxcard = pci_get_class(PCI_CLASS_DISPLAY_VGA<<8, gfxcard);
if (!gfxcard) {
dev_info(&pdev->dev, "no AGP VGA controller\n");
return -ENODEV;
}
cap_ptr = pci_find_capability(gfxcard, PCI_CAP_ID_AGP);
}
/* With so many variants of NVidia cards, it's simpler just
to blacklist them all, and then whitelist them as needed
(if necessary at all). */
if (gfxcard->vendor == PCI_VENDOR_ID_NVIDIA) {
agp_bridge->flags |= AGP_ERRATA_1X;
dev_info(&pdev->dev, "AMD 751 chipset with NVidia GeForce; forcing 1X due to errata\n");
}
pci_dev_put(gfxcard);
}
/* 761 Errata (23613_F.pdf)
* Revisions B0/B1 were a disaster.
* erratum 44: SYSCLK/AGPCLK skew causes 2X failures -- Force mode to 1X
* erratum 45: Timing problem prevents fast writes -- Disable fast write.
* erratum 46: Setup violation on AGP SBA pins - Disable side band addressing.
* With this lot disabled, we should prevent lockups. */
if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_700E) {
if (pdev->revision == 0x10 || pdev->revision == 0x11) {
agp_bridge->flags = AGP_ERRATA_FASTWRITES;
agp_bridge->flags |= AGP_ERRATA_SBA;
agp_bridge->flags |= AGP_ERRATA_1X;
dev_info(&pdev->dev, "AMD 761 chipset with errata; disabling AGP fast writes & SBA and forcing to 1X\n");
}
}
/* 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 agp_amdk7_remove(struct pci_dev *pdev)
{
struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
agp_remove_bridge(bridge);
agp_put_bridge(bridge);
}
#ifdef CONFIG_PM
static int agp_amdk7_suspend(struct pci_dev *pdev, pm_message_t state)
{
pci_save_state(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
static int agp_amdk7_resume(struct pci_dev *pdev)
{
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
return amd_irongate_driver.configure();
}
#endif /* CONFIG_PM */
/* must be the same order as name table above */
static const struct pci_device_id agp_amdk7_pci_table[] = {
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_FE_GATE_7006,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_FE_GATE_700E,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_FE_GATE_700C,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{ }
};
MODULE_DEVICE_TABLE(pci, agp_amdk7_pci_table);
static struct pci_driver agp_amdk7_pci_driver = {
.name = "agpgart-amdk7",
.id_table = agp_amdk7_pci_table,
.probe = agp_amdk7_probe,
.remove = agp_amdk7_remove,
#ifdef CONFIG_PM
.suspend = agp_amdk7_suspend,
.resume = agp_amdk7_resume,
#endif
};
static int __init agp_amdk7_init(void)
{
if (agp_off)
return -EINVAL;
return pci_register_driver(&agp_amdk7_pci_driver);
}
static void __exit agp_amdk7_cleanup(void)
{
pci_unregister_driver(&agp_amdk7_pci_driver);
}
module_init(agp_amdk7_init);
module_exit(agp_amdk7_cleanup);
MODULE_LICENSE("GPL and additional rights");
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