From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/linux/vringh.h | 63 +++++++++++++++++++++++--------
1 files changed, 46 insertions(+), 17 deletions(-)
diff --git a/kernel/include/linux/vringh.h b/kernel/include/linux/vringh.h
index bc6c28d..59bd50f 100644
--- a/kernel/include/linux/vringh.h
+++ b/kernel/include/linux/vringh.h
@@ -1,23 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Linux host-side vring helpers; for when the kernel needs to access
* someone else's vring.
*
* Copyright IBM Corporation, 2013.
* Parts taken from drivers/vhost/vhost.c Copyright 2009 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Written by: Rusty Russell <rusty@rustcorp.com.au>
*/
@@ -27,6 +14,10 @@
#include <linux/virtio_byteorder.h>
#include <linux/uio.h>
#include <linux/slab.h>
+#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
+#include <linux/dma-direction.h>
+#include <linux/vhost_iotlb.h>
+#endif
#include <asm/barrier.h>
/* virtio_ring with information needed for host access. */
@@ -51,6 +42,9 @@
/* The vring (note: it may contain user pointers!) */
struct vring vring;
+
+ /* IOTLB for this vring */
+ struct vhost_iotlb *iotlb;
/* The function to call to notify the guest about added buffers */
void (*notify)(struct vringh *);
@@ -111,9 +105,9 @@
/* Helpers for userspace vrings. */
int vringh_init_user(struct vringh *vrh, u64 features,
unsigned int num, bool weak_barriers,
- struct vring_desc __user *desc,
- struct vring_avail __user *avail,
- struct vring_used __user *used);
+ vring_desc_t __user *desc,
+ vring_avail_t __user *avail,
+ vring_used_t __user *used);
static inline void vringh_iov_init(struct vringh_iov *iov,
struct iovec *iovec, unsigned num)
@@ -261,4 +255,39 @@
{
return __cpu_to_virtio64(vringh_is_little_endian(vrh), val);
}
+
+#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
+
+void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb);
+
+int vringh_init_iotlb(struct vringh *vrh, u64 features,
+ unsigned int num, bool weak_barriers,
+ struct vring_desc *desc,
+ struct vring_avail *avail,
+ struct vring_used *used);
+
+int vringh_getdesc_iotlb(struct vringh *vrh,
+ struct vringh_kiov *riov,
+ struct vringh_kiov *wiov,
+ u16 *head,
+ gfp_t gfp);
+
+ssize_t vringh_iov_pull_iotlb(struct vringh *vrh,
+ struct vringh_kiov *riov,
+ void *dst, size_t len);
+ssize_t vringh_iov_push_iotlb(struct vringh *vrh,
+ struct vringh_kiov *wiov,
+ const void *src, size_t len);
+
+void vringh_abandon_iotlb(struct vringh *vrh, unsigned int num);
+
+int vringh_complete_iotlb(struct vringh *vrh, u16 head, u32 len);
+
+bool vringh_notify_enable_iotlb(struct vringh *vrh);
+void vringh_notify_disable_iotlb(struct vringh *vrh);
+
+int vringh_need_notify_iotlb(struct vringh *vrh);
+
+#endif /* CONFIG_VHOST_IOTLB */
+
#endif /* _LINUX_VRINGH_H */
--
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