iris: Move bo_madvise to kmd backend

bo_madvise() is on hot path, so moving it to kmd backend.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21494>

src/gallium/drivers/iris/i915/iris_bufmgr.c

@@ -27,22 +27,6 @@
 
 #include "drm-uapi/i915_drm.h"
 
-bool
-iris_i915_bo_madvise(struct iris_bo *bo, enum iris_madvice state)
-{
-   uint32_t i915_state = state == IRIS_MADVICE_WILL_NEED ?
-                                  I915_MADV_WILLNEED : I915_MADV_DONTNEED;
-   struct drm_i915_gem_madvise madv = {
-      .handle = bo->gem_handle,
-      .madv = i915_state,
-      .retained = 1,
-   };
-
-   intel_ioctl(iris_bufmgr_get_fd(bo->bufmgr), DRM_IOCTL_I915_GEM_MADVISE, &madv);
-
-   return madv.retained;
-}
-
 int iris_i915_bo_set_caching(struct iris_bo *bo, bool cached)
 {
    struct drm_i915_gem_caching arg = {

src/gallium/drivers/iris/i915/iris_bufmgr.h

@@ -25,7 +25,5 @@
 #include <stdbool.h>
 
 struct iris_bo;
-enum iris_madvice;
 
-bool iris_i915_bo_madvise(struct iris_bo *bo, enum iris_madvice state);
 int iris_i915_bo_set_caching(struct iris_bo *bo, bool cached);

src/gallium/drivers/iris/i915/iris_kmd_backend.c

@@ -91,10 +91,27 @@ i915_gem_create(struct iris_bufmgr *bufmgr,
    return create.handle;
 }
 
+static bool
+i915_bo_madvise(struct iris_bo *bo, enum iris_madvice state)
+{
+   uint32_t i915_state = state == IRIS_MADVICE_WILL_NEED ?
+                                  I915_MADV_WILLNEED : I915_MADV_DONTNEED;
+   struct drm_i915_gem_madvise madv = {
+      .handle = bo->gem_handle,
+      .madv = i915_state,
+      .retained = 1,
+   };
+
+   intel_ioctl(iris_bufmgr_get_fd(bo->bufmgr), DRM_IOCTL_I915_GEM_MADVISE, &madv);
+
+   return madv.retained;
+}
+
 const struct iris_kmd_backend *i915_get_backend(void)
 {
    static const struct iris_kmd_backend i915_backend = {
       .gem_create = i915_gem_create,
+      .bo_madvise = i915_bo_madvise,
    };
    return &i915_backend;
 }

src/gallium/drivers/iris/iris_bufmgr.c

@@ -540,19 +540,13 @@ iris_bo_busy(struct iris_bo *bo)
  * Returns true if the buffer was retained, or false if it was discarded
  * whilst marked as IRIS_MADVICE_DONT_NEED.
  */
-static bool
+static inline bool
 iris_bo_madvise(struct iris_bo *bo, enum iris_madvice state)
 {
    /* We can't madvise suballocated BOs. */
    assert(iris_bo_is_real(bo));
 
-   switch (iris_bufmgr_get_device_info(bo->bufmgr)->kmd_type) {
-   case INTEL_KMD_TYPE_I915:
-      return iris_i915_bo_madvise(bo, state);
-   default:
-      unreachable("missing");
-      return false;
-   }
+   return bo->bufmgr->kmd_backend->bo_madvise(bo, state);
 }
 
 static struct iris_bo *

src/gallium/drivers/iris/iris_kmd_backend.h

@@ -28,14 +28,17 @@
 #include "dev/intel_device_info.h"
 #include "dev/intel_kmd.h"
 
+struct iris_bo;
 struct iris_bufmgr;
 enum iris_heap;
+enum iris_madvice;
 
 struct iris_kmd_backend {
    uint32_t (*gem_create)(struct iris_bufmgr *bufmgr,
                           const struct intel_memory_class_instance **regions,
                           uint16_t regions_count, uint64_t size,
                           enum iris_heap heap_flags, unsigned alloc_flags);
+   bool (*bo_madvise)(struct iris_bo *bo, enum iris_madvice state);
 };
 
 const struct iris_kmd_backend *