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authorDave Airlie <airlied@redhat.com>2009-06-19 10:52:57 +1000
committerDave Airlie <airlied@redhat.com>2009-06-19 10:52:57 +1000
commita95fe463e73b8c7b2d97606ac86ce261f1270726 (patch)
tree8917b33b34e148dc4cce53374f15766f86975770 /drivers/char
parent95934f939c46ea2b37f3c91a4f8c82e003727761 (diff)
agp: add user mapping support to ATI AGP bridge.
This should fix TTM/KMS on some of the original ATI IGP chipsets. (rs100/rs200) Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/agp/ati-agp.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/char/agp/ati-agp.c b/drivers/char/agp/ati-agp.c
index 4d38baa209f..33656e144cc 100644
--- a/drivers/char/agp/ati-agp.c
+++ b/drivers/char/agp/ati-agp.c
@@ -269,12 +269,17 @@ static int ati_insert_memory(struct agp_memory * mem,
int i, j, num_entries;
unsigned long __iomem *cur_gatt;
unsigned long addr;
+ int mask_type;
num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
- 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) > num_entries)
return -EINVAL;
@@ -299,8 +304,8 @@ static int ati_insert_memory(struct agp_memory * mem,
writel(agp_bridge->driver->mask_memory(agp_bridge,
mem->pages[i], mem->type),
cur_gatt+GET_GATT_OFF(addr));
- readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
}
+ readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
agp_bridge->driver->tlb_flush(mem);
return 0;
}
@@ -311,17 +316,22 @@ static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
int i;
unsigned long __iomem *cur_gatt;
unsigned long addr;
+ 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;
+
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. */
}
+ readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
agp_bridge->driver->tlb_flush(mem);
return 0;
}