This add the support for the new fault callback, does change anything
from driver point of view, thought it should allow nouveau to add
support for unmappable VRAM.
Improvement: store the aperture base in a variable so that we don't
call a function to get it on each fault.
Patch hasn't been tested on any hw.
V2 don't derefence bo->mem.mm_node as it's not NULL only for
VRAM or GTT
V3 update after io_mem_reserve/io_mem_free callback balancing
Signed-off-by: Jerome Glisse <jgli...@redhat.com>
---
drivers/gpu/drm/nouveau/nouveau_bo.c | 51 ++++++++++++++++++++++++++++++++++
1 files changed, 51 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c
b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 5a167de..dafb79c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -761,6 +761,54 @@ nouveau_bo_verify_access(struct ttm_buffer_object *bo,
struct file *filp)
return 0;
}
+static int
+nouveau_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+ struct drm_nouveau_private *dev_priv = nouveau_bdev(bdev);
+ struct drm_device *dev = dev_priv->dev;
+
+ mem->bus.offset = 0;
+ mem->bus.size = mem->num_pages << PAGE_SHIFT;
+ mem->bus.base = 0;
+ mem->bus.is_iomem = false;
+ if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+ return -EINVAL;
+ switch (mem->mem_type) {
+ case TTM_PL_SYSTEM:
+ /* System memory */
+ return 0;
+ case TTM_PL_TT:
+#if __OS_HAS_AGP
+ if (dev_priv->gart_info.type == NOUVEAU_GART_AGP) {
+ mem->bus.offset = mem->mm_node->start << PAGE_SHIFT;
+ mem->bus.base = dev_priv->gart_info.aper_base;
+ mem->bus.is_iomem = true;
+ }
+#endif
+ return 0;
+ case TTM_PL_VRAM:
+ mem->bus.offset = mem->mm_node->start << PAGE_SHIFT;
+ mem->bus.base = drm_get_resource_start(dev, 1);
+ mem->bus.is_iomem = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void
+nouveau_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+}
+
+static int
+nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
+{
+ return 0;
+}
+
struct ttm_bo_driver nouveau_bo_driver = {
.create_ttm_backend_entry = nouveau_bo_create_ttm_backend_entry,
.invalidate_caches = nouveau_bo_invalidate_caches,
@@ -773,5 +821,8 @@ struct ttm_bo_driver nouveau_bo_driver = {
.sync_obj_flush = nouveau_fence_flush,
.sync_obj_unref = nouveau_fence_unref,
.sync_obj_ref = nouveau_fence_ref,
+ .fault_reserve_notify = &nouveau_ttm_fault_reserve_notify,
+ .io_mem_reserve = &nouveau_ttm_io_mem_reserve,
+ .io_mem_free = &nouveau_ttm_io_mem_free,
};
--
1.6.6.1
------------------------------------------------------------------------------
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