[Intel-xe] [PATCH 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.

Signed-off-by: Tejas Upadhyay <tejas.upadhyay at intel.com>
---
 drivers/gpu/drm/xe/xe_device_types.h |  5 +++
 drivers/gpu/drm/xe/xe_mmio.c         |  1 +
 drivers/gpu/drm/xe/xe_tile_sysfs.c   | 47 ++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index db61da4d6212..7b5443aebd00 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -107,6 +107,11 @@ 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 475b14fe4356..86a7c65c301f 100644
--- a/drivers/gpu/drm/xe/xe_mmio.c
+++ b/drivers/gpu/drm/xe/xe_mmio.c
@@ -283,6 +283,7 @@ 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 821bd49de277..d48c599e8cc1 100644
--- a/drivers/gpu/drm/xe/xe_tile_sysfs.c
+++ b/drivers/gpu/drm/xe/xe_tile_sysfs.c
@@ -22,6 +22,43 @@ static struct kobj_type xe_tile_sysfs_kobj_type = {
 	.sysfs_ops = &kobj_sysfs_ops,
 };
 
+typedef ssize_t (*show)(struct device *dev, struct device_attribute *attr, char *buf);
+
+struct xe_ext_attr {
+	struct device_attribute attr;
+	show xe_show;
+};
+
+	static ssize_t
+xe_sysfs_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	ssize_t value;
+	struct xe_ext_attr *ea = container_of(attr, struct xe_ext_attr, attr);
+
+	value = ea->xe_show(dev, attr, buf);
+
+	return value;
+}
+
+	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);
+}
+
+#define XE_DEVICE_ATTR_RO(_name, _show) \
+	struct xe_ext_attr dev_attr_##_name = \
+{ __ATTR(_name, 0444, xe_sysfs_show, NULL), _show}
+
+static XE_DEVICE_ATTR_RO(addr_range, addr_range_show);
+
+static const struct attribute *addr_range_attrs[] = {
+	&dev_attr_addr_range.attr.attr,
+	NULL
+};
+
 static void tile_sysfs_fini(struct drm_device *drm, void *arg)
 {
 	struct xe_tile *tile = arg;
@@ -50,9 +87,19 @@ int xe_tile_sysfs_init(struct xe_tile *tile)
 
 	tile->sysfs = &kg->base;
 
+	if (sysfs_create_files(tile->sysfs, addr_range_attrs)) {
+		drm_err(&tile_to_xe(tile)->drm,
+			"Setting up sysfs to read total physical memory per tile failed\n");
+		goto err_object;
+	}
+
 	err = drmm_add_action_or_reset(&tile_to_xe(tile)->drm, tile_sysfs_fini, tile);
 	if (err)
 		return err;
 
+	if (0) {
+err_object:
+		kobject_put(&kg->base);
+	}
 	return 0;
 }
-- 
2.25.1