[PATCH v5 2/5] drm/xe: Move vm bind bo validation to a helper function

[Nirmoy Das <nirmoy.das@intel.com>]

Move vm bind bo validation to a helper function to make the
xe_vm_bind_ioctl() more readable.

v2: Capture ret value of xe_vm_bind_ioctl_validate_bo(Matt B).
    Remove redundant coh_mode param.

Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
---
 drivers/gpu/drm/xe/xe_vm.c | 77 +++++++++++++++++++++-----------------
 1 file changed, 43 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 89c73d109f6a..8fc37c5a0196 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -2875,6 +2875,46 @@ static int vm_bind_ioctl_signal_fences(struct xe_vm *vm,
 	return err;
 }
 
+static int xe_vm_bind_ioctl_validate_bo(struct xe_device *xe, struct xe_bo *bo,
+					u64 addr, u64 range, u64 obj_offset,
+					u16 pat_index)
+{
+	u16 coh_mode;
+
+	if (XE_IOCTL_DBG(xe, range > bo->size) ||
+	    XE_IOCTL_DBG(xe, obj_offset >
+			 bo->size - range)) {
+		return -EINVAL;
+	}
+
+	if (bo->flags & XE_BO_FLAG_INTERNAL_64K) {
+		if (XE_IOCTL_DBG(xe, obj_offset &
+				 XE_64K_PAGE_MASK) ||
+		    XE_IOCTL_DBG(xe, addr & XE_64K_PAGE_MASK) ||
+		    XE_IOCTL_DBG(xe, range & XE_64K_PAGE_MASK)) {
+			return  -EINVAL;
+		}
+	}
+
+	coh_mode = xe_pat_index_get_coh_mode(xe, pat_index);
+	if (bo->cpu_caching) {
+		if (XE_IOCTL_DBG(xe, coh_mode == XE_COH_NONE &&
+				 bo->cpu_caching == DRM_XE_GEM_CPU_CACHING_WB)) {
+			return  -EINVAL;
+		}
+	} else if (XE_IOCTL_DBG(xe, coh_mode == XE_COH_NONE)) {
+		/*
+		 * Imported dma-buf from a different device should
+		 * require 1way or 2way coherency since we don't know
+		 * how it was mapped on the CPU. Just assume is it
+		 * potentially cached on CPU side.
+		 */
+		return  -EINVAL;
+	}
+
+	return 0;
+}
+
 int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 {
 	struct xe_device *xe = to_xe_device(dev);
@@ -2958,7 +2998,6 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 		u32 obj = bind_ops[i].obj;
 		u64 obj_offset = bind_ops[i].obj_offset;
 		u16 pat_index = bind_ops[i].pat_index;
-		u16 coh_mode;
 
 		if (!obj)
 			continue;
@@ -2970,40 +3009,10 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 		}
 		bos[i] = gem_to_xe_bo(gem_obj);
 
-		if (XE_IOCTL_DBG(xe, range > bos[i]->size) ||
-		    XE_IOCTL_DBG(xe, obj_offset >
-				 bos[i]->size - range)) {
-			err = -EINVAL;
-			goto put_obj;
-		}
-
-		if (bos[i]->flags & XE_BO_FLAG_INTERNAL_64K) {
-			if (XE_IOCTL_DBG(xe, obj_offset &
-					 XE_64K_PAGE_MASK) ||
-			    XE_IOCTL_DBG(xe, addr & XE_64K_PAGE_MASK) ||
-			    XE_IOCTL_DBG(xe, range & XE_64K_PAGE_MASK)) {
-				err = -EINVAL;
-				goto put_obj;
-			}
-		}
-
-		coh_mode = xe_pat_index_get_coh_mode(xe, pat_index);
-		if (bos[i]->cpu_caching) {
-			if (XE_IOCTL_DBG(xe, coh_mode == XE_COH_NONE &&
-					 bos[i]->cpu_caching == DRM_XE_GEM_CPU_CACHING_WB)) {
-				err = -EINVAL;
-				goto put_obj;
-			}
-		} else if (XE_IOCTL_DBG(xe, coh_mode == XE_COH_NONE)) {
-			/*
-			 * Imported dma-buf from a different device should
-			 * require 1way or 2way coherency since we don't know
-			 * how it was mapped on the CPU. Just assume is it
-			 * potentially cached on CPU side.
-			 */
-			err = -EINVAL;
+		err = xe_vm_bind_ioctl_validate_bo(xe, bos[i], addr, range,
+						   obj_offset, pat_index);
+		if (err)
 			goto put_obj;
-		}
 	}
 
 	if (args->num_syncs) {
-- 
2.42.0