panfrost: Add a panfrost_context_reinit() helper

Will be needed for v10, so we can re-instantiate a context when an
unrecoverable error is reported on a group or VM.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Antonino Maniscalco <antonino.maniscalco@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26358>

src/gallium/drivers/panfrost/pan_context.c

@@ -986,3 +986,10 @@ panfrost_create_context(struct pipe_screen *screen, void *priv, unsigned flags)
 
    return gallium;
 }
+
+void
+panfrost_context_reinit(struct panfrost_context *ctx)
+{
+   pan_screen(ctx->base.screen)->vtbl.context_cleanup(ctx);
+   pan_screen(ctx->base.screen)->vtbl.context_init(ctx);
+}

src/gallium/drivers/panfrost/pan_context.h

@@ -523,4 +523,6 @@ void panfrost_track_image_access(struct panfrost_batch *batch,
                                  enum pipe_shader_type stage,
                                  struct pipe_image_view *image);
 
+void panfrost_context_reinit(struct panfrost_context *ctx);
+
 #endif