[Intel-xe] [PATCH V3 3/3] drm/xe: Add sysfs entry to report per tile memory size

[Tejas Upadhyay]

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

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

Signed-off-by: Tejas Upadhyay <tejas.upadhyay at intel.com>
---
 drivers/gpu/drm/xe/xe_device_types.h |  6 ++++++
 drivers/gpu/drm/xe/xe_mmio.c         |  1 +
 drivers/gpu/drm/xe/xe_tile_sysfs.c   | 17 +++++++++++++++++
 3 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index db61da4d6212..b8a07826c65f 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -107,6 +107,12 @@ struct xe_tile {
 
 	/** @mem: memory management info for tile */
 	struct {
+		/**
+		 * @actual_physical_mem: Track actual LMEM size
+		 * including stolen mem for tile
+		 */
+		resource_size_t actual_physical_mem;
+
 		/**
 		 * @vram: VRAM info for tile.
 		 *
diff --git a/drivers/gpu/drm/xe/xe_mmio.c b/drivers/gpu/drm/xe/xe_mmio.c
index f7a7f996b37f..6febd11d7dd9 100644
--- a/drivers/gpu/drm/xe/xe_mmio.c
+++ b/drivers/gpu/drm/xe/xe_mmio.c
@@ -277,6 +277,7 @@ int xe_mmio_probe_vram(struct xe_device *xe)
 		if (err)
 			return err;
 
+		tile->mem.actual_physical_mem = tile_size;
 		tile->mem.vram.io_start = xe->mem.vram.io_start + tile_offset;
 		tile->mem.vram.io_size = min_t(u64, vram_size, io_size);
 
diff --git a/drivers/gpu/drm/xe/xe_tile_sysfs.c b/drivers/gpu/drm/xe/xe_tile_sysfs.c
index 5c9ebe40e3c3..b79b756e5e49 100644
--- a/drivers/gpu/drm/xe/xe_tile_sysfs.c
+++ b/drivers/gpu/drm/xe/xe_tile_sysfs.c
@@ -22,6 +22,18 @@ static struct kobj_type xe_tile_sysfs_kobj_type = {
 	.sysfs_ops = &kobj_sysfs_ops,
 };
 
+static ssize_t
+addr_range_show(struct device *kdev, struct device_attribute *attr, char *buf)
+{
+	struct xe_tile *tile = kobj_to_tile(&kdev->kobj);
+
+	return sysfs_emit(buf, "%pa\n", &tile->mem.actual_physical_mem);
+}
+
+static DEVICE_ATTR_RO(addr_range);
+
+static const struct attribute *addr_range_attr = &dev_attr_addr_range.attr;
+
 static void tile_sysfs_fini(struct drm_device *drm, void *arg)
 {
 	struct xe_tile *tile = arg;
@@ -52,6 +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, addr_range_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",
-- 
2.25.1