[PATCH 3/4] drm/nouveau: Add intersect callback function

[Arunpravin Paneer Selvam]

Add a new intersect callback function fetching the
start offset from struct ttm_resource.

Signed-off-by: Christian König <christian.koenig at amd.com>
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam at amd.com>
---
 drivers/gpu/drm/nouveau/nouveau_mem.c | 15 +++++++++++++++
 drivers/gpu/drm/nouveau/nouveau_mem.h |  3 +++
 drivers/gpu/drm/nouveau/nouveau_ttm.c | 12 ++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 2e517cdc24c9..b8a773f03c32 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -187,3 +187,18 @@ nouveau_mem_new(struct nouveau_cli *cli, u8 kind, u8 comp,
 	*res = &mem->base;
 	return 0;
 }
+
+bool
+nouveau_mem_intersect(struct ttm_resource *res,
+		      const struct ttm_place *place,
+		      size_t size)
+{
+	u32 num_pages = PFN_UP(size);
+
+	/* Don't evict BOs outside of the requested placement range */
+	if (place->fpfn >= (res->start + num_pages) ||
+	    (place->lpfn && place->lpfn <= res->start))
+		return false;
+
+	return true;
+}
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.h b/drivers/gpu/drm/nouveau/nouveau_mem.h
index 325551eba5cd..349fefe48e3c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.h
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.h
@@ -25,6 +25,9 @@ int nouveau_mem_new(struct nouveau_cli *, u8 kind, u8 comp,
 		    struct ttm_resource **);
 void nouveau_mem_del(struct ttm_resource_manager *man,
 		     struct ttm_resource *);
+bool nouveau_mem_intersect(struct ttm_resource *res,
+			   const struct ttm_place *place,
+			   size_t size);
 int nouveau_mem_vram(struct ttm_resource *, bool contig, u8 page);
 int nouveau_mem_host(struct ttm_resource *, struct ttm_tt *);
 void nouveau_mem_fini(struct nouveau_mem *);
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index 85f1f5a0fe5d..46afd57008dd 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -42,6 +42,15 @@ nouveau_manager_del(struct ttm_resource_manager *man,
 	nouveau_mem_del(man, reg);
 }
 
+static bool
+nouveau_manager_intersect(struct ttm_resource_manager *man,
+			  struct ttm_resource *res,
+			  const struct ttm_place *place,
+			  size_t size)
+{
+	return nouveau_mem_intersect(res, place, size);
+}
+
 static int
 nouveau_vram_manager_new(struct ttm_resource_manager *man,
 			 struct ttm_buffer_object *bo,
@@ -73,6 +82,7 @@ nouveau_vram_manager_new(struct ttm_resource_manager *man,
 const struct ttm_resource_manager_func nouveau_vram_manager = {
 	.alloc = nouveau_vram_manager_new,
 	.free = nouveau_manager_del,
+	.intersect = nouveau_manager_intersect,
 };
 
 static int
@@ -97,6 +107,7 @@ nouveau_gart_manager_new(struct ttm_resource_manager *man,
 const struct ttm_resource_manager_func nouveau_gart_manager = {
 	.alloc = nouveau_gart_manager_new,
 	.free = nouveau_manager_del,
+	.intersect = nouveau_manager_intersect,
 };
 
 static int
@@ -130,6 +141,7 @@ nv04_gart_manager_new(struct ttm_resource_manager *man,
 const struct ttm_resource_manager_func nv04_gart_manager = {
 	.alloc = nv04_gart_manager_new,
 	.free = nouveau_manager_del,
+	.intersect = nouveau_manager_intersect,
 };
 
 static int
-- 
2.25.1