1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. 4 * Author: Joerg Roedel <joerg.roedel@amd.com> 5 * Leo Duran <leo.duran@amd.com> 6 */ 7 8 #ifndef _ASM_X86_AMD_IOMMU_H 9 #define _ASM_X86_AMD_IOMMU_H 10 11 #include <linux/types.h> 12 13 struct amd_iommu; 14 15 /* 16 * This is mainly used to communicate information back-and-forth 17 * between SVM and IOMMU for setting up and tearing down posted 18 * interrupt 19 */ 20 struct amd_iommu_pi_data { 21 u32 ga_tag; 22 u32 prev_ga_tag; 23 u64 base; 24 bool is_guest_mode; 25 struct vcpu_data *vcpu_data; 26 void *ir_data; 27 }; 28 29 #ifdef CONFIG_AMD_IOMMU 30 31 struct task_struct; 32 struct pci_dev; 33 34 extern int amd_iommu_detect(void); 35 extern int amd_iommu_init_hardware(void); 36 37 /** 38 * amd_iommu_init_device() - Init device for use with IOMMUv2 driver 39 * @pdev: The PCI device to initialize 40 * @pasids: Number of PASIDs to support for this device 41 * 42 * This function does all setup for the device pdev so that it can be 43 * used with IOMMUv2. 44 * Returns 0 on success or negative value on error. 45 */ 46 extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); 47 48 /** 49 * amd_iommu_free_device() - Free all IOMMUv2 related device resources 50 * and disable IOMMUv2 usage for this device 51 * @pdev: The PCI device to disable IOMMUv2 usage for' 52 */ 53 extern void amd_iommu_free_device(struct pci_dev *pdev); 54 55 /** 56 * amd_iommu_bind_pasid() - Bind a given task to a PASID on a device 57 * @pdev: The PCI device to bind the task to 58 * @pasid: The PASID on the device the task should be bound to 59 * @task: the task to bind 60 * 61 * The function returns 0 on success or a negative value on error. 62 */ 63 extern int amd_iommu_bind_pasid(struct pci_dev *pdev, u32 pasid, 64 struct task_struct *task); 65 66 /** 67 * amd_iommu_unbind_pasid() - Unbind a PASID from its task on 68 * a device 69 * @pdev: The device of the PASID 70 * @pasid: The PASID to unbind 71 * 72 * When this function returns the device is no longer using the PASID 73 * and the PASID is no longer bound to its task. 74 */ 75 extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, u32 pasid); 76 77 /** 78 * amd_iommu_set_invalid_ppr_cb() - Register a call-back for failed 79 * PRI requests 80 * @pdev: The PCI device the call-back should be registered for 81 * @cb: The call-back function 82 * 83 * The IOMMUv2 driver invokes this call-back when it is unable to 84 * successfully handle a PRI request. The device driver can then decide 85 * which PRI response the device should see. Possible return values for 86 * the call-back are: 87 * 88 * - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device 89 * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device 90 * - AMD_IOMMU_INV_PRI_RSP_FAIL - Send Failure back to the device, 91 * the device is required to disable 92 * PRI when it receives this response 93 * 94 * The function returns 0 on success or negative value on error. 95 */ 96 #define AMD_IOMMU_INV_PRI_RSP_SUCCESS 0 97 #define AMD_IOMMU_INV_PRI_RSP_INVALID 1 98 #define AMD_IOMMU_INV_PRI_RSP_FAIL 2 99 100 typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev, 101 u32 pasid, 102 unsigned long address, 103 u16); 104 105 extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev, 106 amd_iommu_invalid_ppr_cb cb); 107 108 #define PPR_FAULT_EXEC (1 << 1) 109 #define PPR_FAULT_READ (1 << 2) 110 #define PPR_FAULT_WRITE (1 << 5) 111 #define PPR_FAULT_USER (1 << 6) 112 #define PPR_FAULT_RSVD (1 << 7) 113 #define PPR_FAULT_GN (1 << 8) 114 115 /** 116 * amd_iommu_device_info() - Get information about IOMMUv2 support of a 117 * PCI device 118 * @pdev: PCI device to query information from 119 * @info: A pointer to an amd_iommu_device_info structure which will contain 120 * the information about the PCI device 121 * 122 * Returns 0 on success, negative value on error 123 */ 124 125 #define AMD_IOMMU_DEVICE_FLAG_ATS_SUP 0x1 /* ATS feature supported */ 126 #define AMD_IOMMU_DEVICE_FLAG_PRI_SUP 0x2 /* PRI feature supported */ 127 #define AMD_IOMMU_DEVICE_FLAG_PASID_SUP 0x4 /* PASID context supported */ 128 #define AMD_IOMMU_DEVICE_FLAG_EXEC_SUP 0x8 /* Device may request execution 129 on memory pages */ 130 #define AMD_IOMMU_DEVICE_FLAG_PRIV_SUP 0x10 /* Device may request 131 super-user privileges */ 132 133 struct amd_iommu_device_info { 134 int max_pasids; 135 u32 flags; 136 }; 137 138 extern int amd_iommu_device_info(struct pci_dev *pdev, 139 struct amd_iommu_device_info *info); 140 141 /** 142 * amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating 143 * a pasid context. This call-back is 144 * invoked when the IOMMUv2 driver needs to 145 * invalidate a PASID context, for example 146 * because the task that is bound to that 147 * context is about to exit. 148 * 149 * @pdev: The PCI device the call-back should be registered for 150 * @cb: The call-back function 151 */ 152 153 typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, u32 pasid); 154 155 extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev, 156 amd_iommu_invalidate_ctx cb); 157 #else /* CONFIG_AMD_IOMMU */ 158 159 static inline int amd_iommu_detect(void) { return -ENODEV; } 160 161 #endif /* CONFIG_AMD_IOMMU */ 162 163 #if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) 164 165 /* IOMMU AVIC Function */ 166 extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32)); 167 168 extern int 169 amd_iommu_update_ga(int cpu, bool is_run, void *data); 170 171 extern int amd_iommu_activate_guest_mode(void *data); 172 extern int amd_iommu_deactivate_guest_mode(void *data); 173 174 #else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */ 175 176 static inline int 177 amd_iommu_register_ga_log_notifier(int (*notifier)(u32)) 178 { 179 return 0; 180 } 181 182 static inline int 183 amd_iommu_update_ga(int cpu, bool is_run, void *data) 184 { 185 return 0; 186 } 187 188 static inline int amd_iommu_activate_guest_mode(void *data) 189 { 190 return 0; 191 } 192 193 static inline int amd_iommu_deactivate_guest_mode(void *data) 194 { 195 return 0; 196 } 197 #endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */ 198 199 int amd_iommu_get_num_iommus(void); 200 bool amd_iommu_pc_supported(void); 201 u8 amd_iommu_pc_get_max_banks(unsigned int idx); 202 u8 amd_iommu_pc_get_max_counters(unsigned int idx); 203 int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, 204 u64 *value); 205 int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, 206 u64 *value); 207 struct amd_iommu *get_amd_iommu(unsigned int idx); 208 209 #endif /* _ASM_X86_AMD_IOMMU_H */ 210