[PATCH 1/2] accel/ivpu: Add fdinfo support for memory statistics

[Karol Wachowski <karol.wachowski@linux.intel.com>]

Implement DRM fdinfo interface to expose memory usage statistics
for NPU device file descriptors. Exclude unpinned and imported
buffers from resident memory calculations to provide accurate
memory usage reporting.

Signed-off-by: Karol Wachowski <karol.wachowski@linux.intel.com>
---
 drivers/accel/ivpu/ivpu_drv.c |  6 ++++++
 drivers/accel/ivpu/ivpu_gem.c | 12 ++++++++++++
 drivers/accel/ivpu/ivpu_gem.h |  5 +++++
 3 files changed, 23 insertions(+)

diff --git a/drivers/accel/ivpu/ivpu_drv.c b/drivers/accel/ivpu/ivpu_drv.c
index b305effcf003..ce7dbd473059 100644
--- a/drivers/accel/ivpu/ivpu_drv.c
+++ b/drivers/accel/ivpu/ivpu_drv.c
@@ -455,6 +455,9 @@ int ivpu_shutdown(struct ivpu_device *vdev)
 static const struct file_operations ivpu_fops = {
 	.owner		= THIS_MODULE,
 	DRM_ACCEL_FOPS,
+#if CONFIG_PROC_FS
+	.show_fdinfo = drm_show_fdinfo,
+#endif
 };
 
 static const struct drm_driver driver = {
@@ -469,6 +472,9 @@ static const struct drm_driver driver = {
 	.ioctls = ivpu_drm_ioctls,
 	.num_ioctls = ARRAY_SIZE(ivpu_drm_ioctls),
 	.fops = &ivpu_fops,
+#if CONFIG_PROC_FS
+	.show_fdinfo = drm_show_memory_stats,
+#endif
 
 	.name = DRIVER_NAME,
 	.desc = DRIVER_DESC,
diff --git a/drivers/accel/ivpu/ivpu_gem.c b/drivers/accel/ivpu/ivpu_gem.c
index 03d39615ad37..a460cef4e0a0 100644
--- a/drivers/accel/ivpu/ivpu_gem.c
+++ b/drivers/accel/ivpu/ivpu_gem.c
@@ -335,6 +335,17 @@ static void ivpu_gem_bo_free(struct drm_gem_object *obj)
 	drm_gem_shmem_free(&bo->base);
 }
 
+static enum drm_gem_object_status ivpu_gem_status(struct drm_gem_object *obj)
+{
+	struct ivpu_bo *bo = to_ivpu_bo(obj);
+	enum drm_gem_object_status status = 0;
+
+	if (ivpu_bo_is_resident(bo))
+		status |= DRM_GEM_OBJECT_RESIDENT;
+
+	return status;
+}
+
 static const struct drm_gem_object_funcs ivpu_gem_funcs = {
 	.free = ivpu_gem_bo_free,
 	.open = ivpu_gem_bo_open,
@@ -345,6 +356,7 @@ static const struct drm_gem_object_funcs ivpu_gem_funcs = {
 	.vmap = drm_gem_shmem_object_vmap,
 	.vunmap = drm_gem_shmem_object_vunmap,
 	.mmap = drm_gem_shmem_object_mmap,
+	.status = ivpu_gem_status,
 	.vm_ops = &drm_gem_shmem_vm_ops,
 };
 
diff --git a/drivers/accel/ivpu/ivpu_gem.h b/drivers/accel/ivpu/ivpu_gem.h
index 2dcd7eba9cb7..0c3350f22b55 100644
--- a/drivers/accel/ivpu/ivpu_gem.h
+++ b/drivers/accel/ivpu/ivpu_gem.h
@@ -82,6 +82,11 @@ static inline bool ivpu_bo_is_read_only(struct ivpu_bo *bo)
 	return bo->flags & DRM_IVPU_BO_READ_ONLY;
 }
 
+static inline bool ivpu_bo_is_resident(struct ivpu_bo *bo)
+{
+	return !!bo->base.pages;
+}
+
 static inline void *ivpu_to_cpu_addr(struct ivpu_bo *bo, u32 vpu_addr)
 {
 	if (vpu_addr < bo->vpu_addr)
-- 
2.43.0