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Release 4.12 include/linux/amd-iommu.h

Directory: include/linux
 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
 * Author: Joerg Roedel <>
 *         Leo Duran <>
 * 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
 * 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>

 * This is mainly used to communicate information back-and-forth
 * between SVM and IOMMU for setting up and tearing down posted
 * interrupt

struct amd_iommu_pi_data {
u32 ga_tag;
u32 prev_ga_tag;
u64 base;
bool is_guest_mode;
struct vcpu_data *vcpu_data;
void *ir_data;


struct task_struct;
struct pci_dev;

extern int amd_iommu_detect(void);
extern int amd_iommu_init_hardware(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



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);

 * amd_iommu_bind_pasid() - Bind a given task to a PASID on a device
 * @pdev: The PCI device to bind the task to
 * @pasid: The PASID on the device the task should be bound to
 * @task: the task to bind
 * The function returns 0 on success or a negative value on error.
extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid,
				struct task_struct *task);

 * amd_iommu_unbind_pasid() - Unbind a PASID from its task on
 *                            a device
 * @pdev: The device of the PASID
 * @pasid: The PASID to unbind
 * When this function returns the device is no longer using the PASID
 * and the PASID is no longer bound to its task.
extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid);

 * amd_iommu_set_invalid_ppr_cb() - Register a call-back for failed
 *                                  PRI requests
 * @pdev: The PCI device the call-back should be registered for
 * @cb: The call-back function
 * The IOMMUv2 driver invokes this call-back when it is unable to
 * successfully handle a PRI request. The device driver can then decide
 * which PRI response the device should see. Possible return values for
 * the call-back are:
 * - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device
 * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device
 * - AMD_IOMMU_INV_PRI_RSP_FAIL    - Send Failure back to the device,
 *                                   the device is required to disable
 *                                   PRI when it receives this response
 * The function returns 0 on success or negative value on error.




typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev,
					int pasid,
					unsigned long address,

extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev,
					amd_iommu_invalid_ppr_cb cb);

#define PPR_FAULT_EXEC	(1 << 1)

#define PPR_FAULT_READ  (1 << 2)

#define PPR_FAULT_WRITE (1 << 5)

#define PPR_FAULT_USER  (1 << 6)

#define PPR_FAULT_RSVD  (1 << 7)

#define PPR_FAULT_GN    (1 << 8)

 * amd_iommu_device_info() - Get information about IOMMUv2 support of a
 *                           PCI device
 * @pdev: PCI device to query information from
 * @info: A pointer to an amd_iommu_device_info structure which will contain
 *        the information about the PCI device
 * Returns 0 on success, negative value on error

#define AMD_IOMMU_DEVICE_FLAG_ATS_SUP     0x1    
/* ATS feature supported */

#define AMD_IOMMU_DEVICE_FLAG_PRI_SUP     0x2    
/* PRI feature supported */

/* PASID context supported */

/* Device may request execution
                                                    on memory pages */

/* Device may request
                                                    super-user privileges */

struct amd_iommu_device_info {
int max_pasids;
u32 flags;

extern int amd_iommu_device_info(struct pci_dev *pdev,
				 struct amd_iommu_device_info *info);

 * amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating
 *                                     a pasid context. This call-back is
 *                                     invoked when the IOMMUv2 driver needs to
 *                                     invalidate a PASID context, for example
 *                                     because the task that is bound to that
 *                                     context is about to exit.
 * @pdev: The PCI device the call-back should be registered for
 * @cb: The call-back function

typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid);

extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
					   amd_iommu_invalidate_ctx cb);
#else /* CONFIG_AMD_IOMMU */

static inline int amd_iommu_detect(void) { return -ENODEV; }


Konrad Rzeszutek Wilk753.85%150.00%
Joerg Roedel646.15%150.00%

#endif /* CONFIG_AMD_IOMMU */ #if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) /* IOMMU AVIC Function */ extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32)); extern int amd_iommu_update_ga(int cpu, bool is_run, void *data); #else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
static inline int amd_iommu_register_ga_log_notifier(int (*notifier)(u32)) { return 0; }


Suravee Suthikulpanit19100.00%1100.00%

static inline int amd_iommu_update_ga(int cpu, bool is_run, void *data) { return 0; }


Suravee Suthikulpanit20100.00%1100.00%

#endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */ #endif /* _ASM_X86_AMD_IOMMU_H */

Overall Contributors

Joerg Roedel25262.69%1062.50%
Suravee Suthikulpanit11528.61%318.75%
Alexey Skidanov245.97%16.25%
Konrad Rzeszutek Wilk81.99%16.25%
H. Peter Anvin30.75%16.25%
Directory: include/linux
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