drm/xe: Add sysfs entry to report per tile memory size

Add sysfs entry to read per tile physical memory
including stolen memory.

V5:
  - rename var name and make it part of vram struct - Lucas
V4:
  - %s/addr_range/physical_vram_size_byes, make it
    user readable name - Joonas/Aravind
  - Display in bytes - Joonas/Aravind
V3:
  - Exclude DG1, replace sysfs_create_file/files - Aravind
V2:
  - Use DEVICE_ATTR_RO - Aravind
  - Dont put kobj on sysfs_file_create fail - Himal
  - Skip addr_range sysfs create for non dgfx - Himal

Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_tile_sysfs.c b/drivers/gpu/drm/xe/xe_tile_sysfs.c
index 2d64fa54b5a8..16376607c68f 100644
--- a/drivers/gpu/drm/xe/xe_tile_sysfs.c
+++ b/drivers/gpu/drm/xe/xe_tile_sysfs.c
@@ -20,6 +20,20 @@ static const struct kobj_type xe_tile_sysfs_kobj_type = {
 	.sysfs_ops = &kobj_sysfs_ops,
 };
 
+static ssize_t
+physical_vram_size_bytes_show(struct device *kdev, struct device_attribute *attr,
+			      char *buf)
+{
+	struct xe_tile *tile = kobj_to_tile(&kdev->kobj);
+
+	return sysfs_emit(buf, "%llu\n", tile->mem.vram.actual_physical_size);
+}
+
+static DEVICE_ATTR_RO(physical_vram_size_bytes);
+
+static const struct attribute *physical_memsize_attr =
+	&dev_attr_physical_vram_size_bytes.attr;
+
 static void tile_sysfs_fini(struct drm_device *drm, void *arg)
 {
 	struct xe_tile *tile = arg;
@@ -50,6 +64,11 @@ void xe_tile_sysfs_init(struct xe_tile *tile)
 
 	tile->sysfs = &kt->base;
 
+	if (IS_DGFX(xe) && xe->info.platform != XE_DG1 &&
+	    sysfs_create_file(tile->sysfs, physical_memsize_attr))
+		drm_warn(&xe->drm,
+			 "Sysfs creation to read addr_range per tile failed\n");
+
 	err = drmm_add_action_or_reset(&xe->drm, tile_sysfs_fini, tile);
 	if (err) {
 		drm_warn(&xe->drm, "%s: drmm_add_action_or_reset failed, err: %d\n",