/* * SPDX-License-Identifier: MIT * * Copyright © 2017 Intel Corporation */ #include <linux/fs.h> #include <linux/mount.h> #include <linux/pagemap.h> #include "i915_drv.h" #include "i915_gemfs.h" int i915_gemfs_init(struct drm_i915_private *i915) { struct file_system_type *type; struct vfsmount *gemfs; type = get_fs_type("tmpfs"); if (!type) return -ENODEV; /* * By creating our own shmemfs mountpoint, we can pass in * mount flags that better match our usecase. * * One example, although it is probably better with a per-file * control, is selecting huge page allocations ("huge=within_size"). * Currently unused due to bandwidth issues (slow reads) on Broadwell+. */ gemfs = kern_mount(type); if (IS_ERR(gemfs)) return PTR_ERR(gemfs); i915->mm.gemfs = gemfs; return 0; } void i915_gemfs_fini(struct drm_i915_private *i915) { kern_unmount(i915->mm.gemfs); }