drm/xe/guc: Allocate GuC data structures in system memory for initial load

GuC load will need to happen at an earlier point in probe, where local
memory is not yet available. Use system memory for GuC data structures
used for initial "hwconfig" load, and realloc at a later,
"post-hwconfig" load if needed, when local memory is available.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240219130530.1406044-1-michal.winiarski@intel.com

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index 9d7ad67bd7b4..76dfaf1cd200 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -1612,6 +1612,38 @@ struct xe_bo *xe_managed_bo_create_from_data(struct xe_device *xe, struct xe_til
 	return bo;
 }
 
+/**
+ * xe_managed_bo_reinit_in_vram
+ * @xe: xe device
+ * @tile: Tile where the new buffer will be created
+ * @src: Managed buffer object allocated in system memory
+ *
+ * Replace a managed src buffer object allocated in system memory with a new
+ * one allocated in vram, copying the data between them.
+ * Buffer object in VRAM is not going to have the same GGTT address, the caller
+ * is responsible for making sure that any old references to it are updated.
+ *
+ * Returns 0 for success, negative error code otherwise.
+ */
+int xe_managed_bo_reinit_in_vram(struct xe_device *xe, struct xe_tile *tile, struct xe_bo **src)
+{
+	struct xe_bo *bo;
+
+	xe_assert(xe, IS_DGFX(xe));
+	xe_assert(xe, !(*src)->vmap.is_iomem);
+
+	bo = xe_managed_bo_create_from_data(xe, tile, (*src)->vmap.vaddr, (*src)->size,
+					    XE_BO_CREATE_VRAM_IF_DGFX(tile) |
+					    XE_BO_CREATE_GGTT_BIT);
+	if (IS_ERR(bo))
+		return PTR_ERR(bo);
+
+	drmm_release_action(&xe->drm, __xe_bo_unpin_map_no_vm, *src);
+	*src = bo;
+
+	return 0;
+}
+
 /*
  * XXX: This is in the VM bind data path, likely should calculate this once and
  * store, with a recalculation if the BO is moved.