Alpha needs to have available the system bus address for the Radeon's
local memory, so that it can be used in ttm_bo_vm_fault(), when building
the PTEs for accessing that VRAM. So, we make bus.addr hold the ioremap()
return, and then we can modify bus.base appropriately for use during page
fault processing.
Signed-off-by: Jay Estabrook <redacted>
---
drivers/gpu/drm/radeon/radeon_ttm.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff -Naurp a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
--- a/drivers/gpu/drm/radeon/radeon_ttm.c 2011-04-26 23:48:50.000000000 -0400
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c 2011-05-03 18:24:27.000000000 -0400
@@ -450,6 +450,29 @@ static int radeon_ttm_io_mem_reserve(str
return -EINVAL;
mem->bus.base = rdev->mc.aper_base;
mem->bus.is_iomem = true;
+#ifdef __alpha__
+ /*
+ * Alpha: use bus.addr to hold the ioremap() return,
+ * so we can modify bus.base below.
+ */
+ if (mem->placement & TTM_PL_FLAG_WC)
+ mem->bus.addr =
+ ioremap_wc(mem->bus.base + mem->bus.offset,
+ mem->bus.size);
+ else
+ mem->bus.addr =
+ ioremap_nocache(mem->bus.base + mem->bus.offset,
+ mem->bus.size);
+
+ /*
+ * Alpha: Take just the bus offset and
+ * add the hose/domain memory base.
+ * Then, bus.base can be returned
+ * for use in an mmap() call.
+ */
+ mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +
+ rdev->ddev->hose->dense_mem_base;
+#endif
break;
default:
return -EINVAL;