| /* |
| * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
| * Author: Joerg Roedel <joerg.roedel@amd.com> |
| * Leo Duran <leo.duran@amd.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #ifndef _ASM_X86_AMD_IOMMU_H |
| #define _ASM_X86_AMD_IOMMU_H |
| |
| #include <linux/types.h> |
| |
| #ifdef CONFIG_AMD_IOMMU |
| |
| struct pci_dev; |
| |
| extern int amd_iommu_detect(void); |
| |
| |
| /** |
| * amd_iommu_enable_device_erratum() - Enable erratum workaround for device |
| * in the IOMMUv2 driver |
| * @pdev: The PCI device the workaround is necessary for |
| * @erratum: The erratum workaround to enable |
| * |
| * The function needs to be called before amd_iommu_init_device(). |
| * Possible values for the erratum number are for now: |
| * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI |
| * is enabled |
| * - AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE - Limit number of outstanding PRI |
| * requests to one |
| */ |
| #define AMD_PRI_DEV_ERRATUM_ENABLE_RESET 0 |
| #define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE 1 |
| |
| extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); |
| |
| /** |
| * amd_iommu_init_device() - Init device for use with IOMMUv2 driver |
| * @pdev: The PCI device to initialize |
| * @pasids: Number of PASIDs to support for this device |
| * |
| * This function does all setup for the device pdev so that it can be |
| * used with IOMMUv2. |
| * Returns 0 on success or negative value on error. |
| */ |
| extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); |
| |
| /** |
| * amd_iommu_free_device() - Free all IOMMUv2 related device resources |
| * and disable IOMMUv2 usage for this device |
| * @pdev: The PCI device to disable IOMMUv2 usage for' |
| */ |
| extern void amd_iommu_free_device(struct pci_dev *pdev); |
| |
| #else |
| |
| static inline int amd_iommu_detect(void) { return -ENODEV; } |
| |
| #endif |
| |
| #endif /* _ASM_X86_AMD_IOMMU_H */ |