[PATCH v4 5/7] drm/gpuvm: Add a flags field to drm_gpuvm_map_req/drm_gpuva_op_map

[Caterina Shablia <caterina.shablia@collabora.com>]

From: Asahi Lina <lina@asahilina.net>

drm_gpuva objects have a flags field. Currently, this can be managed by
drivers out-of-band, without any special handling in drm_gpuvm.

To be able to introduce flags that do affect the logic in the drm_gpuvm
core, we need to plumb it through the map calls. This will allow the
core to check the flags on map and alter the merge/split logic depending
on the requested flags and the flags of the existing drm_gpuva ranges
that are being split.

Signed-off-by: Asahi Lina <lina@asahilina.net>
Signed-off-by: Caterina Shablia <caterina.shablia@collabora.com>
---
 drivers/gpu/drm/drm_gpuvm.c | 7 +++++++
 include/drm/drm_gpuvm.h     | 9 +++++++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/drm_gpuvm.c b/drivers/gpu/drm/drm_gpuvm.c
index dc3c2f906400..dd949a8853b0 100644
--- a/drivers/gpu/drm/drm_gpuvm.c
+++ b/drivers/gpu/drm/drm_gpuvm.c
@@ -2063,6 +2063,7 @@ op_map_cb(const struct drm_gpuvm_ops *fn, void *priv,
 	op.map.va.range = req->va.range;
 	op.map.gem.obj = req->gem.obj;
 	op.map.gem.offset = req->gem.offset;
+	op.map.flags = req->flags;
 
 	return fn->sm_step_map(&op, priv);
 }
@@ -2175,6 +2176,7 @@ __drm_gpuvm_sm_map(struct drm_gpuvm *gpuvm,
 					.va.range = range - req->va.range,
 					.gem.obj = obj,
 					.gem.offset = offset + req->va.range,
+					.flags = va->flags,
 				};
 				struct drm_gpuva_op_unmap u = {
 					.va = va,
@@ -2193,6 +2195,7 @@ __drm_gpuvm_sm_map(struct drm_gpuvm *gpuvm,
 				.va.range = ls_range,
 				.gem.obj = obj,
 				.gem.offset = offset,
+				.flags = va->flags,
 			};
 			struct drm_gpuva_op_unmap u = { .va = va };
 
@@ -2219,6 +2222,7 @@ __drm_gpuvm_sm_map(struct drm_gpuvm *gpuvm,
 					.gem.obj = obj,
 					.gem.offset = offset + ls_range +
 						      req->va.range,
+					.flags = va->flags,
 				};
 
 				ret = op_remap_cb(ops, priv, &p, &n, &u);
@@ -2247,6 +2251,7 @@ __drm_gpuvm_sm_map(struct drm_gpuvm *gpuvm,
 					.va.range = end - req_end,
 					.gem.obj = obj,
 					.gem.offset = offset + req_end - addr,
+					.flags = va->flags,
 				};
 				struct drm_gpuva_op_unmap u = {
 					.va = va,
@@ -2290,6 +2295,7 @@ __drm_gpuvm_sm_unmap(struct drm_gpuvm *gpuvm,
 			prev.va.range = req_addr - addr;
 			prev.gem.obj = obj;
 			prev.gem.offset = offset;
+			prev.flags = va->flags;
 
 			prev_split = true;
 		}
@@ -2299,6 +2305,7 @@ __drm_gpuvm_sm_unmap(struct drm_gpuvm *gpuvm,
 			next.va.range = end - req_end;
 			next.gem.obj = obj;
 			next.gem.offset = offset + (req_end - addr);
+			next.flags = va->flags;
 
 			next_split = true;
 		}
diff --git a/include/drm/drm_gpuvm.h b/include/drm/drm_gpuvm.h
index a6e6c33fc10b..f77a89e791f1 100644
--- a/include/drm/drm_gpuvm.h
+++ b/include/drm/drm_gpuvm.h
@@ -847,6 +847,11 @@ struct drm_gpuva_op_map {
 		 */
 		struct drm_gem_object *obj;
 	} gem;
+
+	/**
+	 * @flags: requested flags for the &drm_gpuva for this mapping
+	 */
+	enum drm_gpuva_flags flags;
 };
 
 /**
@@ -1074,6 +1079,9 @@ struct drm_gpuvm_map_req {
 		/** @offset: offset in the GEM */
 		u64 offset;
 	} gem;
+
+	/** @flags: combination of DRM_GPUVA_ flags describing the mapping properties. */
+	enum drm_gpuva_flags flags;
 };
 
 struct drm_gpuva_ops *
@@ -1097,6 +1105,7 @@ void drm_gpuva_ops_free(struct drm_gpuvm *gpuvm,
 static inline void drm_gpuva_init_from_op(struct drm_gpuva *va,
 					  struct drm_gpuva_op_map *op)
 {
+	va->flags = op->flags;
 	va->va.addr = op->va.addr;
 	va->va.range = op->va.range;
 	va->gem.obj = op->gem.obj;
-- 
2.47.2