projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| c6da992e | 1 | /* |
| 5d0d7156 | 2 | * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
| c6da992e JR |
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 | ||
| 1965aae3 PA |
20 | #ifndef _ASM_X86_AMD_IOMMU_H |
| 21 | #define _ASM_X86_AMD_IOMMU_H | |
| c6da992e | 22 | |
| ed96f228 | 23 | #include <linux/types.h> |
| c6da992e JR |
24 | |
| 25 | #ifdef CONFIG_AMD_IOMMU | |
| 6a9401a7 | 26 | |
| ed96f228 JR |
27 | struct pci_dev; |
| 28 | ||
| 480125ba | 29 | extern int amd_iommu_detect(void); |
| 6a9401a7 | 30 | |
| 6a113ddc JR |
31 | |
| 32 | /** | |
| 33 | * amd_iommu_enable_device_erratum() - Enable erratum workaround for device | |
| 34 | * in the IOMMUv2 driver | |
| 35 | * @pdev: The PCI device the workaround is necessary for | |
| 36 | * @erratum: The erratum workaround to enable | |
| 37 | * | |
| ed96f228 | 38 | * The function needs to be called before amd_iommu_init_device(). |
| 6a113ddc JR |
39 | * Possible values for the erratum number are for now: |
| 40 | * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI | |
| 41 | * is enabled | |
| 42 | * - AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE - Limit number of outstanding PRI | |
| 43 | * requests to one | |
| 44 | */ | |
| 45 | #define AMD_PRI_DEV_ERRATUM_ENABLE_RESET 0 | |
| 46 | #define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE 1 | |
| 47 | ||
| 48 | extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); | |
| 49 | ||
| ed96f228 JR |
50 | /** |
| 51 | * amd_iommu_init_device() - Init device for use with IOMMUv2 driver | |
| 52 | * @pdev: The PCI device to initialize | |
| 53 | * @pasids: Number of PASIDs to support for this device | |
| 54 | * | |
| 55 | * This function does all setup for the device pdev so that it can be | |
| 56 | * used with IOMMUv2. | |
| 57 | * Returns 0 on success or negative value on error. | |
| 58 | */ | |
| 59 | extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); | |
| 60 | ||
| 61 | /** | |
| 62 | * amd_iommu_free_device() - Free all IOMMUv2 related device resources | |
| 63 | * and disable IOMMUv2 usage for this device | |
| 64 | * @pdev: The PCI device to disable IOMMUv2 usage for' | |
| 65 | */ | |
| 66 | extern void amd_iommu_free_device(struct pci_dev *pdev); | |
| 67 | ||
| c6da992e | 68 | #else |
| 6a9401a7 | 69 | |
| 480125ba | 70 | static inline int amd_iommu_detect(void) { return -ENODEV; } |
| 6a9401a7 | 71 | |
| c6da992e JR |
72 | #endif |
| 73 | ||
| 1965aae3 | 74 | #endif /* _ASM_X86_AMD_IOMMU_H */ |