1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
8 #ifndef _ASM_X86_AMD_IOMMU_H
9 #define _ASM_X86_AMD_IOMMU_H
11 #include <linux/types.h>
16 * This is mainly used to communicate information back-and-forth
17 * between SVM and IOMMU for setting up and tearing down posted
20 struct amd_iommu_pi_data {
25 struct vcpu_data *vcpu_data;
29 #ifdef CONFIG_AMD_IOMMU
34 extern int amd_iommu_detect(void);
37 * amd_iommu_init_device() - Init device for use with IOMMUv2 driver
38 * @pdev: The PCI device to initialize
39 * @pasids: Number of PASIDs to support for this device
41 * This function does all setup for the device pdev so that it can be
43 * Returns 0 on success or negative value on error.
45 extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids);
48 * amd_iommu_free_device() - Free all IOMMUv2 related device resources
49 * and disable IOMMUv2 usage for this device
50 * @pdev: The PCI device to disable IOMMUv2 usage for'
52 extern void amd_iommu_free_device(struct pci_dev *pdev);
55 * amd_iommu_bind_pasid() - Bind a given task to a PASID on a device
56 * @pdev: The PCI device to bind the task to
57 * @pasid: The PASID on the device the task should be bound to
58 * @task: the task to bind
60 * The function returns 0 on success or a negative value on error.
62 extern int amd_iommu_bind_pasid(struct pci_dev *pdev, u32 pasid,
63 struct task_struct *task);
66 * amd_iommu_unbind_pasid() - Unbind a PASID from its task on
68 * @pdev: The device of the PASID
69 * @pasid: The PASID to unbind
71 * When this function returns the device is no longer using the PASID
72 * and the PASID is no longer bound to its task.
74 extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, u32 pasid);
77 * amd_iommu_set_invalid_ppr_cb() - Register a call-back for failed
79 * @pdev: The PCI device the call-back should be registered for
80 * @cb: The call-back function
82 * The IOMMUv2 driver invokes this call-back when it is unable to
83 * successfully handle a PRI request. The device driver can then decide
84 * which PRI response the device should see. Possible return values for
87 * - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device
88 * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device
89 * - AMD_IOMMU_INV_PRI_RSP_FAIL - Send Failure back to the device,
90 * the device is required to disable
91 * PRI when it receives this response
93 * The function returns 0 on success or negative value on error.
95 #define AMD_IOMMU_INV_PRI_RSP_SUCCESS 0
96 #define AMD_IOMMU_INV_PRI_RSP_INVALID 1
97 #define AMD_IOMMU_INV_PRI_RSP_FAIL 2
99 typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev,
101 unsigned long address,
104 extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev,
105 amd_iommu_invalid_ppr_cb cb);
107 #define PPR_FAULT_EXEC (1 << 1)
108 #define PPR_FAULT_READ (1 << 2)
109 #define PPR_FAULT_WRITE (1 << 5)
110 #define PPR_FAULT_USER (1 << 6)
111 #define PPR_FAULT_RSVD (1 << 7)
112 #define PPR_FAULT_GN (1 << 8)
115 * amd_iommu_device_info() - Get information about IOMMUv2 support of a
117 * @pdev: PCI device to query information from
118 * @info: A pointer to an amd_iommu_device_info structure which will contain
119 * the information about the PCI device
121 * Returns 0 on success, negative value on error
124 #define AMD_IOMMU_DEVICE_FLAG_ATS_SUP 0x1 /* ATS feature supported */
125 #define AMD_IOMMU_DEVICE_FLAG_PRI_SUP 0x2 /* PRI feature supported */
126 #define AMD_IOMMU_DEVICE_FLAG_PASID_SUP 0x4 /* PASID context supported */
127 #define AMD_IOMMU_DEVICE_FLAG_EXEC_SUP 0x8 /* Device may request execution
129 #define AMD_IOMMU_DEVICE_FLAG_PRIV_SUP 0x10 /* Device may request
130 super-user privileges */
132 struct amd_iommu_device_info {
137 extern int amd_iommu_device_info(struct pci_dev *pdev,
138 struct amd_iommu_device_info *info);
141 * amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating
142 * a pasid context. This call-back is
143 * invoked when the IOMMUv2 driver needs to
144 * invalidate a PASID context, for example
145 * because the task that is bound to that
146 * context is about to exit.
148 * @pdev: The PCI device the call-back should be registered for
149 * @cb: The call-back function
152 typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, u32 pasid);
154 extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
155 amd_iommu_invalidate_ctx cb);
156 #else /* CONFIG_AMD_IOMMU */
158 static inline int amd_iommu_detect(void) { return -ENODEV; }
160 #endif /* CONFIG_AMD_IOMMU */
162 #if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP)
164 /* IOMMU AVIC Function */
165 extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));
168 amd_iommu_update_ga(int cpu, bool is_run, void *data);
170 extern int amd_iommu_activate_guest_mode(void *data);
171 extern int amd_iommu_deactivate_guest_mode(void *data);
173 #else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
176 amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
182 amd_iommu_update_ga(int cpu, bool is_run, void *data)
187 static inline int amd_iommu_activate_guest_mode(void *data)
192 static inline int amd_iommu_deactivate_guest_mode(void *data)
196 #endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
198 int amd_iommu_get_num_iommus(void);
199 bool amd_iommu_pc_supported(void);
200 u8 amd_iommu_pc_get_max_banks(unsigned int idx);
201 u8 amd_iommu_pc_get_max_counters(unsigned int idx);
202 int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
204 int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
206 struct amd_iommu *get_amd_iommu(unsigned int idx);
208 #ifdef CONFIG_AMD_MEM_ENCRYPT
209 int amd_iommu_snp_enable(void);
212 #endif /* _ASM_X86_AMD_IOMMU_H */