Root/
1 | /* |
2 | * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
3 | * Author: Joerg Roedel <joerg.roedel@amd.com> |
4 | * Leo Duran <leo.duran@amd.com> |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License version 2 as published |
8 | * by the Free Software Foundation. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ |
19 | |
20 | #ifndef _ASM_X86_AMD_IOMMU_H |
21 | #define _ASM_X86_AMD_IOMMU_H |
22 | |
23 | #include <linux/types.h> |
24 | |
25 | #ifdef CONFIG_AMD_IOMMU |
26 | |
27 | struct task_struct; |
28 | struct pci_dev; |
29 | |
30 | extern int amd_iommu_detect(void); |
31 | extern int amd_iommu_init_hardware(void); |
32 | |
33 | /** |
34 | * amd_iommu_enable_device_erratum() - Enable erratum workaround for device |
35 | * in the IOMMUv2 driver |
36 | * @pdev: The PCI device the workaround is necessary for |
37 | * @erratum: The erratum workaround to enable |
38 | * |
39 | * The function needs to be called before amd_iommu_init_device(). |
40 | * Possible values for the erratum number are for now: |
41 | * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI |
42 | * is enabled |
43 | * - AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE - Limit number of outstanding PRI |
44 | * requests to one |
45 | */ |
46 | #define AMD_PRI_DEV_ERRATUM_ENABLE_RESET 0 |
47 | #define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE 1 |
48 | |
49 | extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); |
50 | |
51 | /** |
52 | * amd_iommu_init_device() - Init device for use with IOMMUv2 driver |
53 | * @pdev: The PCI device to initialize |
54 | * @pasids: Number of PASIDs to support for this device |
55 | * |
56 | * This function does all setup for the device pdev so that it can be |
57 | * used with IOMMUv2. |
58 | * Returns 0 on success or negative value on error. |
59 | */ |
60 | extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); |
61 | |
62 | /** |
63 | * amd_iommu_free_device() - Free all IOMMUv2 related device resources |
64 | * and disable IOMMUv2 usage for this device |
65 | * @pdev: The PCI device to disable IOMMUv2 usage for' |
66 | */ |
67 | extern void amd_iommu_free_device(struct pci_dev *pdev); |
68 | |
69 | /** |
70 | * amd_iommu_bind_pasid() - Bind a given task to a PASID on a device |
71 | * @pdev: The PCI device to bind the task to |
72 | * @pasid: The PASID on the device the task should be bound to |
73 | * @task: the task to bind |
74 | * |
75 | * The function returns 0 on success or a negative value on error. |
76 | */ |
77 | extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, |
78 | struct task_struct *task); |
79 | |
80 | /** |
81 | * amd_iommu_unbind_pasid() - Unbind a PASID from its task on |
82 | * a device |
83 | * @pdev: The device of the PASID |
84 | * @pasid: The PASID to unbind |
85 | * |
86 | * When this function returns the device is no longer using the PASID |
87 | * and the PASID is no longer bound to its task. |
88 | */ |
89 | extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid); |
90 | |
91 | /** |
92 | * amd_iommu_set_invalid_ppr_cb() - Register a call-back for failed |
93 | * PRI requests |
94 | * @pdev: The PCI device the call-back should be registered for |
95 | * @cb: The call-back function |
96 | * |
97 | * The IOMMUv2 driver invokes this call-back when it is unable to |
98 | * successfully handle a PRI request. The device driver can then decide |
99 | * which PRI response the device should see. Possible return values for |
100 | * the call-back are: |
101 | * |
102 | * - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device |
103 | * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device |
104 | * - AMD_IOMMU_INV_PRI_RSP_FAIL - Send Failure back to the device, |
105 | * the device is required to disable |
106 | * PRI when it receives this response |
107 | * |
108 | * The function returns 0 on success or negative value on error. |
109 | */ |
110 | #define AMD_IOMMU_INV_PRI_RSP_SUCCESS 0 |
111 | #define AMD_IOMMU_INV_PRI_RSP_INVALID 1 |
112 | #define AMD_IOMMU_INV_PRI_RSP_FAIL 2 |
113 | |
114 | typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev, |
115 | int pasid, |
116 | unsigned long address, |
117 | u16); |
118 | |
119 | extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev, |
120 | amd_iommu_invalid_ppr_cb cb); |
121 | |
122 | /** |
123 | * amd_iommu_device_info() - Get information about IOMMUv2 support of a |
124 | * PCI device |
125 | * @pdev: PCI device to query information from |
126 | * @info: A pointer to an amd_iommu_device_info structure which will contain |
127 | * the information about the PCI device |
128 | * |
129 | * Returns 0 on success, negative value on error |
130 | */ |
131 | |
132 | #define AMD_IOMMU_DEVICE_FLAG_ATS_SUP 0x1 /* ATS feature supported */ |
133 | #define AMD_IOMMU_DEVICE_FLAG_PRI_SUP 0x2 /* PRI feature supported */ |
134 | #define AMD_IOMMU_DEVICE_FLAG_PASID_SUP 0x4 /* PASID context supported */ |
135 | #define AMD_IOMMU_DEVICE_FLAG_EXEC_SUP 0x8 /* Device may request execution |
136 | on memory pages */ |
137 | #define AMD_IOMMU_DEVICE_FLAG_PRIV_SUP 0x10 /* Device may request |
138 | super-user privileges */ |
139 | |
140 | struct amd_iommu_device_info { |
141 | int max_pasids; |
142 | u32 flags; |
143 | }; |
144 | |
145 | extern int amd_iommu_device_info(struct pci_dev *pdev, |
146 | struct amd_iommu_device_info *info); |
147 | |
148 | /** |
149 | * amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating |
150 | * a pasid context. This call-back is |
151 | * invoked when the IOMMUv2 driver needs to |
152 | * invalidate a PASID context, for example |
153 | * because the task that is bound to that |
154 | * context is about to exit. |
155 | * |
156 | * @pdev: The PCI device the call-back should be registered for |
157 | * @cb: The call-back function |
158 | */ |
159 | |
160 | typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid); |
161 | |
162 | extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev, |
163 | amd_iommu_invalidate_ctx cb); |
164 | |
165 | #else |
166 | |
167 | static inline int amd_iommu_detect(void) { return -ENODEV; } |
168 | |
169 | #endif |
170 | |
171 | #endif /* _ASM_X86_AMD_IOMMU_H */ |
172 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9