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drm/ati_pcigart: fix the PCIGART to use drm_pci to allocate GART table.

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This fixes a problem on 64-bit with 4GB with ATI RS690 chipsets. It
makes sure the pcigart table is allocated in coherent memory for DMA operations.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2008-03-17 10:24:24 +10:00
parent 16d3be46d9
commit b05c23851a
4 changed files with 27 additions and 69 deletions
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91
drivers/char/drm/ati_pcigart.c
View file

@ -35,42 +35,23 @@
# define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
static void *drm_ati_alloc_pcigart_table(int order)
static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
unsigned long address;
struct page *page;
int i;
gart_info->table_handle = drm_pci_alloc(dev, gart_info->table_size,
PAGE_SIZE,
gart_info->table_mask);
if (gart_info->table_handle == NULL)
return -ENOMEM;
DRM_DEBUG("%d order\n", order);
address = __get_free_pages(GFP_KERNEL | __GFP_COMP,
order);
if (address == 0UL) {
return NULL;
}
page = virt_to_page(address);
for (i = 0; i < order; i++, page++)
SetPageReserved(page);
DRM_DEBUG("returning 0x%08lx\n", address);
return (void *)address;
return 0;
}
static void drm_ati_free_pcigart_table(void *address, int order)
static void drm_ati_free_pcigart_table(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
struct page *page;
int i;
int num_pages = 1 << order;
DRM_DEBUG("\n");
page = virt_to_page((unsigned long)address);
for (i = 0; i < num_pages; i++, page++)
ClearPageReserved(page);
free_pages((unsigned long)address, order);
drm_pci_free(dev, gart_info->table_handle);
gart_info->table_handle = NULL;
}
int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
@ -78,8 +59,7 @@ int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info
struct drm_sg_mem *entry = dev->sg;
unsigned long pages;
int i;
int order;
int num_pages, max_pages;
int max_pages;
/* we need to support large memory configurations */
if (!entry) {
@ -87,15 +67,7 @@ int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info
return 0;
}
order = drm_order((gart_info->table_size + (PAGE_SIZE-1)) / PAGE_SIZE);
num_pages = 1 << order;
if (gart_info->bus_addr) {
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
pci_unmap_single(dev->pdev, gart_info->bus_addr,
num_pages * PAGE_SIZE,
PCI_DMA_TODEVICE);
}
max_pages = (gart_info->table_size / sizeof(u32));
pages = (entry->pages <= max_pages)
@ -112,10 +84,9 @@ int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info
gart_info->bus_addr = 0;
}
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN
&& gart_info->addr) {
drm_ati_free_pcigart_table(gart_info->addr, order);
gart_info->addr = NULL;
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN &&
gart_info->table_handle) {
drm_ati_free_pcigart_table(dev, gart_info);
}
return 1;
@ -127,11 +98,10 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
struct drm_sg_mem *entry = dev->sg;
void *address = NULL;
unsigned long pages;
u32 *pci_gart, page_base, bus_address = 0;
u32 *pci_gart, page_base;
dma_addr_t bus_address = 0;
int i, j, ret = 0;
int order;
int max_pages;
int num_pages;
if (!entry) {
DRM_ERROR("no scatter/gather memory!\n");
@ -141,31 +111,14 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
order = drm_order((gart_info->table_size +
(PAGE_SIZE-1)) / PAGE_SIZE);
num_pages = 1 << order;
address = drm_ati_alloc_pcigart_table(order);
if (!address) {
ret = drm_ati_alloc_pcigart_table(dev, gart_info);
if (ret) {
DRM_ERROR("cannot allocate PCI GART page!\n");
goto done;
}
if (!dev->pdev) {
DRM_ERROR("PCI device unknown!\n");
goto done;
}
bus_address = pci_map_single(dev->pdev, address,
num_pages * PAGE_SIZE,
PCI_DMA_TODEVICE);
if (bus_address == 0) {
DRM_ERROR("unable to map PCIGART pages!\n");
order = drm_order((gart_info->table_size +
(PAGE_SIZE-1)) / PAGE_SIZE);
drm_ati_free_pcigart_table(address, order);
address = NULL;
goto done;
}
address = gart_info->table_handle->vaddr;
bus_address = gart_info->table_handle->busaddr;
} else {
address = gart_info->addr;
bus_address = gart_info->bus_addr;

3
drivers/char/drm/drmP.h
View file

@ -54,6 +54,7 @@
#include <linux/pci.h>
#include <linux/jiffies.h>
#include <linux/smp_lock.h> /* For (un)lock_kernel */
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/cdev.h>
#include <linux/mutex.h>
@ -551,6 +552,8 @@ struct drm_ati_pcigart_info {
int gart_reg_if;
void *addr;
dma_addr_t bus_addr;
dma_addr_t table_mask;
struct drm_dma_handle *table_handle;
drm_local_map_t mapping;
int table_size;
};

1
drivers/char/drm/r128_cce.c
View file

@ -558,6 +558,7 @@ static int r128_do_init_cce(struct drm_device * dev, drm_r128_init_t * init)
#if __OS_HAS_AGP
if (dev_priv->is_pci) {
#endif
dev_priv->gart_info.table_mask = DMA_BIT_MASK(32);
dev_priv->gart_info.gart_table_location = DRM_ATI_GART_MAIN;
dev_priv->gart_info.table_size = R128_PCIGART_TABLE_SIZE;
dev_priv->gart_info.addr = NULL;

1
drivers/char/drm/radeon_cp.c
View file

@ -1807,6 +1807,7 @@ static int radeon_do_init_cp(struct drm_device * dev, drm_radeon_init_t * init)
} else
#endif
{
dev_priv->gart_info.table_mask = DMA_BIT_MASK(32);
/* if we have an offset set from userspace */
if (dev_priv->pcigart_offset_set) {
dev_priv->gart_info.bus_addr =