mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Joerg Roedel](/assets/img/avatar_default.png)
Add infrastructure for errata-handling and handle two known erratas in the IOMMUv2 code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
/*
|
|
* 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/irqreturn.h>
|
|
|
|
#ifdef CONFIG_AMD_IOMMU
|
|
|
|
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
|
|
*
|
|
* 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);
|
|
|
|
#else
|
|
|
|
static inline int amd_iommu_detect(void) { return -ENODEV; }
|
|
|
|
#endif
|
|
|
|
#endif /* _ASM_X86_AMD_IOMMU_H */
|