Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 1 | /* |
Joerg Roedel | 5d0d715 | 2010-10-13 11:13:21 +0200 | [diff] [blame] | 2 | * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 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 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 20 | #ifndef _ASM_X86_AMD_IOMMU_H |
| 21 | #define _ASM_X86_AMD_IOMMU_H |
Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 22 | |
Joerg Roedel | ed96f22 | 2011-11-23 17:30:39 +0100 | [diff] [blame] | 23 | #include <linux/types.h> |
Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 24 | |
| 25 | #ifdef CONFIG_AMD_IOMMU |
Joerg Roedel | 6a9401a | 2009-11-20 13:22:21 +0100 | [diff] [blame] | 26 | |
Joerg Roedel | 2d5503b | 2011-11-24 10:41:57 +0100 | [diff] [blame^] | 27 | struct task_struct; |
Joerg Roedel | ed96f22 | 2011-11-23 17:30:39 +0100 | [diff] [blame] | 28 | struct pci_dev; |
| 29 | |
Konrad Rzeszutek Wilk | 480125b | 2010-08-26 13:57:57 -0400 | [diff] [blame] | 30 | extern int amd_iommu_detect(void); |
Joerg Roedel | 2d5503b | 2011-11-24 10:41:57 +0100 | [diff] [blame^] | 31 | extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, |
| 32 | struct task_struct *task); |
| 33 | extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid); |
Joerg Roedel | 6a9401a | 2009-11-20 13:22:21 +0100 | [diff] [blame] | 34 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 35 | |
| 36 | /** |
| 37 | * amd_iommu_enable_device_erratum() - Enable erratum workaround for device |
| 38 | * in the IOMMUv2 driver |
| 39 | * @pdev: The PCI device the workaround is necessary for |
| 40 | * @erratum: The erratum workaround to enable |
| 41 | * |
Joerg Roedel | ed96f22 | 2011-11-23 17:30:39 +0100 | [diff] [blame] | 42 | * The function needs to be called before amd_iommu_init_device(). |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 43 | * Possible values for the erratum number are for now: |
| 44 | * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI |
| 45 | * is enabled |
| 46 | * - AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE - Limit number of outstanding PRI |
| 47 | * requests to one |
| 48 | */ |
| 49 | #define AMD_PRI_DEV_ERRATUM_ENABLE_RESET 0 |
| 50 | #define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE 1 |
| 51 | |
| 52 | extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); |
| 53 | |
Joerg Roedel | ed96f22 | 2011-11-23 17:30:39 +0100 | [diff] [blame] | 54 | /** |
| 55 | * amd_iommu_init_device() - Init device for use with IOMMUv2 driver |
| 56 | * @pdev: The PCI device to initialize |
| 57 | * @pasids: Number of PASIDs to support for this device |
| 58 | * |
| 59 | * This function does all setup for the device pdev so that it can be |
| 60 | * used with IOMMUv2. |
| 61 | * Returns 0 on success or negative value on error. |
| 62 | */ |
| 63 | extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); |
| 64 | |
| 65 | /** |
| 66 | * amd_iommu_free_device() - Free all IOMMUv2 related device resources |
| 67 | * and disable IOMMUv2 usage for this device |
| 68 | * @pdev: The PCI device to disable IOMMUv2 usage for' |
| 69 | */ |
| 70 | extern void amd_iommu_free_device(struct pci_dev *pdev); |
| 71 | |
Joerg Roedel | 2d5503b | 2011-11-24 10:41:57 +0100 | [diff] [blame^] | 72 | /** |
| 73 | * amd_iommu_bind_pasid() - Bind a given task to a PASID on a device |
| 74 | * @pdev: The PCI device to bind the task to |
| 75 | * @pasid: The PASID on the device the task should be bound to |
| 76 | * @task: the task to bind |
| 77 | * |
| 78 | * The function returns 0 on success or a negative value on error. |
| 79 | */ |
| 80 | extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, |
| 81 | struct task_struct *task); |
| 82 | |
| 83 | /** |
| 84 | * amd_iommu_unbind_pasid() - Unbind a PASID from its task on |
| 85 | * a device |
| 86 | * @pdev: The device of the PASID |
| 87 | * @pasid: The PASID to unbind |
| 88 | * |
| 89 | * When this function returns the device is no longer using the PASID |
| 90 | * and the PASID is no longer bound to its task. |
| 91 | */ |
| 92 | extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid); |
| 93 | |
Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 94 | #else |
Joerg Roedel | 6a9401a | 2009-11-20 13:22:21 +0100 | [diff] [blame] | 95 | |
Konrad Rzeszutek Wilk | 480125b | 2010-08-26 13:57:57 -0400 | [diff] [blame] | 96 | static inline int amd_iommu_detect(void) { return -ENODEV; } |
Joerg Roedel | 6a9401a | 2009-11-20 13:22:21 +0100 | [diff] [blame] | 97 | |
Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 98 | #endif |
| 99 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 100 | #endif /* _ASM_X86_AMD_IOMMU_H */ |