51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/* Copyright (C) 2024 Raspberry Pi */
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/mount.h>
|
|
|
|
#include "v3d_drv.h"
|
|
|
|
void v3d_gemfs_init(struct v3d_dev *v3d)
|
|
{
|
|
char huge_opt[] = "huge=within_size";
|
|
struct file_system_type *type;
|
|
struct vfsmount *gemfs;
|
|
|
|
/*
|
|
* By creating our own shmemfs mountpoint, we can pass in
|
|
* mount flags that better match our usecase. However, we
|
|
* only do so on platforms which benefit from it.
|
|
*/
|
|
if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE))
|
|
goto err;
|
|
|
|
/* The user doesn't want to enable Super Pages */
|
|
if (!super_pages)
|
|
goto err;
|
|
|
|
type = get_fs_type("tmpfs");
|
|
if (!type)
|
|
goto err;
|
|
|
|
gemfs = vfs_kern_mount(type, SB_KERNMOUNT, type->name, huge_opt);
|
|
if (IS_ERR(gemfs))
|
|
goto err;
|
|
|
|
v3d->gemfs = gemfs;
|
|
drm_info(&v3d->drm, "Using Transparent Hugepages\n");
|
|
|
|
return;
|
|
|
|
err:
|
|
v3d->gemfs = NULL;
|
|
drm_notice(&v3d->drm,
|
|
"Transparent Hugepage support is recommended for optimal performance on this platform!\n");
|
|
}
|
|
|
|
void v3d_gemfs_fini(struct v3d_dev *v3d)
|
|
{
|
|
if (v3d->gemfs)
|
|
kern_unmount(v3d->gemfs);
|
|
}
|