1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * SPDX-License-Identifier: MIT 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright © 2017 Intel Corporation 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <linux/fs.h> 8*4882a593Smuzhiyun #include <linux/mount.h> 9*4882a593Smuzhiyun #include <linux/pagemap.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include "i915_drv.h" 12*4882a593Smuzhiyun #include "i915_gemfs.h" 13*4882a593Smuzhiyun i915_gemfs_init(struct drm_i915_private * i915)14*4882a593Smuzhiyunint i915_gemfs_init(struct drm_i915_private *i915) 15*4882a593Smuzhiyun { 16*4882a593Smuzhiyun struct file_system_type *type; 17*4882a593Smuzhiyun struct vfsmount *gemfs; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun type = get_fs_type("tmpfs"); 20*4882a593Smuzhiyun if (!type) 21*4882a593Smuzhiyun return -ENODEV; 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* 24*4882a593Smuzhiyun * By creating our own shmemfs mountpoint, we can pass in 25*4882a593Smuzhiyun * mount flags that better match our usecase. 26*4882a593Smuzhiyun * 27*4882a593Smuzhiyun * One example, although it is probably better with a per-file 28*4882a593Smuzhiyun * control, is selecting huge page allocations ("huge=within_size"). 29*4882a593Smuzhiyun * Currently unused due to bandwidth issues (slow reads) on Broadwell+. 30*4882a593Smuzhiyun */ 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun gemfs = kern_mount(type); 33*4882a593Smuzhiyun if (IS_ERR(gemfs)) 34*4882a593Smuzhiyun return PTR_ERR(gemfs); 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun i915->mm.gemfs = gemfs; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun return 0; 39*4882a593Smuzhiyun } 40*4882a593Smuzhiyun i915_gemfs_fini(struct drm_i915_private * i915)41*4882a593Smuzhiyunvoid i915_gemfs_fini(struct drm_i915_private *i915) 42*4882a593Smuzhiyun { 43*4882a593Smuzhiyun kern_unmount(i915->mm.gemfs); 44*4882a593Smuzhiyun } 45