From 071106ecf68c401173c58808b1cf5f68cc50d390 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 05 Jan 2024 08:39:27 +0000
Subject: [PATCH] change wifi driver to cypress
---
kernel/include/linux/intel-svm.h | 108 ++++++-----------------------------------------------
1 files changed, 13 insertions(+), 95 deletions(-)
diff --git a/kernel/include/linux/intel-svm.h b/kernel/include/linux/intel-svm.h
index 733eaf9..39d368a 100644
--- a/kernel/include/linux/intel-svm.h
+++ b/kernel/include/linux/intel-svm.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright © 2015 Intel Corporation.
*
* Authors: David Woodhouse <David.Woodhouse@intel.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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.
*/
#ifndef __INTEL_SVM_H__
@@ -19,8 +11,8 @@
struct device;
struct svm_dev_ops {
- void (*fault_cb)(struct device *dev, int pasid, u64 address,
- u32 private, int rwxp, int response);
+ void (*fault_cb)(struct device *dev, u32 pasid, u64 address,
+ void *private, int rwxp, int response);
};
/* Values for rxwp in fault_cb callback */
@@ -28,7 +20,6 @@
#define SVM_REQ_WRITE (1<<2)
#define SVM_REQ_EXEC (1<<1)
#define SVM_REQ_PRIV (1<<0)
-
/*
* The SVM_FLAG_PRIVATE_PASID flag requests a PASID which is *not* the "main"
@@ -52,90 +43,17 @@
* do such IOTLB flushes automatically.
*/
#define SVM_FLAG_SUPERVISOR_MODE (1<<1)
-
-#ifdef CONFIG_INTEL_IOMMU_SVM
-
-/**
- * intel_svm_bind_mm() - Bind the current process to a PASID
- * @dev: Device to be granted acccess
- * @pasid: Address for allocated PASID
- * @flags: Flags. Later for requesting supervisor mode, etc.
- * @ops: Callbacks to device driver
- *
- * This function attempts to enable PASID support for the given device.
- * If the @pasid argument is non-%NULL, a PASID is allocated for access
- * to the MM of the current process.
- *
- * By using a %NULL value for the @pasid argument, this function can
- * be used to simply validate that PASID support is available for the
- * given device — i.e. that it is behind an IOMMU which has the
- * requisite support, and is enabled.
- *
- * Page faults are handled transparently by the IOMMU code, and there
- * should be no need for the device driver to be involved. If a page
- * fault cannot be handled (i.e. is an invalid address rather than
- * just needs paging in), then the page request will be completed by
- * the core IOMMU code with appropriate status, and the device itself
- * can then report the resulting fault to its driver via whatever
- * mechanism is appropriate.
- *
- * Multiple calls from the same process may result in the same PASID
- * being re-used. A reference count is kept.
+/*
+ * The SVM_FLAG_GUEST_MODE flag is used when a PASID bind is for guest
+ * processes. Compared to the host bind, the primary differences are:
+ * 1. mm life cycle management
+ * 2. fault reporting
*/
-extern int intel_svm_bind_mm(struct device *dev, int *pasid, int flags,
- struct svm_dev_ops *ops);
-
-/**
- * intel_svm_unbind_mm() - Unbind a specified PASID
- * @dev: Device for which PASID was allocated
- * @pasid: PASID value to be unbound
- *
- * This function allows a PASID to be retired when the device no
- * longer requires access to the address space of a given process.
- *
- * If the use count for the PASID in question reaches zero, the
- * PASID is revoked and may no longer be used by hardware.
- *
- * Device drivers are required to ensure that no access (including
- * page requests) is currently outstanding for the PASID in question,
- * before calling this function.
+#define SVM_FLAG_GUEST_MODE (1<<2)
+/*
+ * The SVM_FLAG_GUEST_PASID flag is used when a guest has its own PASID space,
+ * which requires guest and host PASID translation at both directions.
*/
-extern int intel_svm_unbind_mm(struct device *dev, int pasid);
-
-/**
- * intel_svm_is_pasid_valid() - check if pasid is valid
- * @dev: Device for which PASID was allocated
- * @pasid: PASID value to be checked
- *
- * This function checks if the specified pasid is still valid. A
- * valid pasid means the backing mm is still having a valid user.
- * For kernel callers init_mm is always valid. for other mm, if mm->mm_users
- * is non-zero, it is valid.
- *
- * returns -EINVAL if invalid pasid, 0 if pasid ref count is invalid
- * 1 if pasid is valid.
- */
-extern int intel_svm_is_pasid_valid(struct device *dev, int pasid);
-
-#else /* CONFIG_INTEL_IOMMU_SVM */
-
-static inline int intel_svm_bind_mm(struct device *dev, int *pasid,
- int flags, struct svm_dev_ops *ops)
-{
- return -ENOSYS;
-}
-
-static inline int intel_svm_unbind_mm(struct device *dev, int pasid)
-{
- BUG();
-}
-
-static inline int intel_svm_is_pasid_valid(struct device *dev, int pasid)
-{
- return -EINVAL;
-}
-#endif /* CONFIG_INTEL_IOMMU_SVM */
-
-#define intel_svm_available(dev) (!intel_svm_bind_mm((dev), NULL, 0, NULL))
+#define SVM_FLAG_GUEST_PASID (1<<3)
#endif /* __INTEL_SVM_H__ */
--
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