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agp/nvidia: Support agp user-memory on nvidia agp. 

This adds user memory support required for TTM to the nvidia AGP driver.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2008-09-10 14:13:33 +02:00 committed by Dave Airlie
parent 2a32c3c894
commit a64d2b37c2
1 changed files with 18 additions and 4 deletions
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22
drivers/char/agp/nvidia-agp.c
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@ -201,10 +201,15 @@ extern int agp_memory_reserved;
static int nvidia_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
{
int i, j;
int mask_type;
if ((type != 0) || (mem->type != 0))
mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
if (mask_type != 0 || type != mem->type)
return -EINVAL;
if (mem->page_count == 0)
return 0;
if ((pg_start + mem->page_count) >
(nvidia_private.num_active_entries - agp_memory_reserved/PAGE_SIZE))
return -EINVAL;
@ -220,10 +225,13 @@ static int nvidia_insert_memory(struct agp_memory *mem, off_t pg_start, int type
}
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
writel(agp_bridge->driver->mask_memory(agp_bridge,
mem->memory[i], mem->type),
mem->memory[i], mask_type),
agp_bridge->gatt_table+nvidia_private.pg_offset+j);
readl(agp_bridge->gatt_table+nvidia_private.pg_offset+j); /* PCI Posting. */
}
/* PCI Posting. */
readl(agp_bridge->gatt_table+nvidia_private.pg_offset+j - 1);
agp_bridge->driver->tlb_flush(mem);
return 0;
}
@ -233,9 +241,15 @@ static int nvidia_remove_memory(struct agp_memory *mem, off_t pg_start, int type
{
int i;
if ((type != 0) || (mem->type != 0))
int mask_type;
mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
if (mask_type != 0 || type != mem->type)
return -EINVAL;
if (mem->page_count == 0)
return 0;
for (i = pg_start; i < (mem->page_count + pg_start); i++)
writel(agp_bridge->scratch_page, agp_bridge->gatt_table+nvidia_private.pg_offset+i);