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linux/drivers/iommu/amd_iommu_proto.h

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 136 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.384967451@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 02:57:47 +03:00
/* SPDX-License-Identifier: GPL-2.0-only */
x86/amd-iommu: Separate internal interface definitions This patch moves all function declarations which are only used inside the driver code to a seperate header file. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-20 15:22:21 +03:00
/*
x86/amd-iommu: Update copyright headers This patch updates the copyright headers in all source files of the AMD IOMMU driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2010-10-13 13:13:21 +04:00
* Copyright (C) 2009-2010 Advanced Micro Devices, Inc.
iommu: Update my email address The AMD address is dead for a long time already, replace it with a working one. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-02-04 18:12:55 +03:00
* Author: Joerg Roedel <jroedel@suse.de>
x86/amd-iommu: Separate internal interface definitions This patch moves all function declarations which are only used inside the driver code to a seperate header file. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-20 15:22:21 +03:00
*/
#ifndef _ASM_X86_AMD_IOMMU_PROTO_H
#define _ASM_X86_AMD_IOMMU_PROTO_H
iommu/amd: Move missing parts to drivers/iommu A few parts of the driver were missing in drivers/iommu. Move them there to have the complete driver in that directory. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-06-14 18:44:25 +04:00
#include "amd_iommu_types.h"
x86/amd-iommu: Separate internal interface definitions This patch moves all function declarations which are only used inside the driver code to a seperate header file. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-20 15:22:21 +03:00
x86/events, drivers/iommu/amd: Introduce amd_iommu_get_num_iommus() Introduce amd_iommu_get_num_iommus(), which returns the value of amd_iommus_present. The function is used to replace direct access to the variable, which is now declared as static. This function will also be used by AMD IOMMU perf driver. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jörg Rödel <joro@8bytes.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/1487926102-13073-6-git-send-email-Suravee.Suthikulpanit@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-24 11:48:17 +03:00
extern int amd_iommu_get_num_iommus(void);
x86/amd-iommu: Separate internal interface definitions This patch moves all function declarations which are only used inside the driver code to a seperate header file. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-20 15:22:21 +03:00
extern int amd_iommu_init_dma_ops(void);
extern int amd_iommu_init_passthrough(void);
x86/amd-iommu: Use threaded interupt handler Move the interupt handling for the iommu into the interupt thread to reduce latencies and prepare interupt handling for pri handling. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-05-10 12:50:42 +04:00
extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
x86/amd-iommu: Separate internal interface definitions This patch moves all function declarations which are only used inside the driver code to a seperate header file. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-20 15:22:21 +03:00
extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
extern void amd_iommu_apply_erratum_63(u16 devid);
extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
x86/amd-iommu: Fix passthrough mode The data structure changes to use dev->archdata.iommu field broke the iommu=pt mode because in this case the dev->archdata.iommu was left uninitialized. This moves the inititalization of the devices into the main init function and fixes the problem. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-12-10 13:03:39 +03:00
extern int amd_iommu_init_devices(void);
extern void amd_iommu_uninit_devices(void);
x86/amd-iommu: Fix PCI hotplug with passthrough mode The device change notifier is initialized in the dma_ops initialization path. But this path is never executed for iommu=pt. Move the notifier initialization to IOMMU hardware init code to fix this. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-12-10 13:12:25 +03:00
extern void amd_iommu_init_notifier(void);
iommu/amd: Propagate errors from amd_iommu_init_api This function can fail. Propagate any errors back to the initialization state machine. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-05-28 19:41:45 +03:00
extern int amd_iommu_init_api(void);
iommu/amd: Add iommuv2 flag to struct amd_iommu In mixed IOMMU setups this flag inidicates whether an IOMMU supports the v2 features or not. This patch also adds a global flag together with a function to query that flag from other code. The flag shows if at least one IOMMUv2 is in the system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-28 18:11:02 +04:00
iommu/amd: Add basic debugfs infrastructure for AMD IOMMU Implement a skeleton framework for debugfs support in the AMD IOMMU. Add an AMD-specific Kconfig boolean that depends upon general enablement of DebugFS in the IOMMU. Signed-off-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-06-13 00:41:30 +03:00
#ifdef CONFIG_AMD_IOMMU_DEBUGFS
void amd_iommu_debugfs_setup(struct amd_iommu *iommu);
#else
static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {}
#endif
iommu/amd: Add initialization routines for AMD interrupt remapping Add the six routines required to setup interrupt remapping with the AMD IOMMU. Also put it all together into the AMD specific irq_remap_ops. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-26 18:46:04 +04:00
/* Needed for interrupt remapping */
extern int amd_iommu_prepare(void);
extern int amd_iommu_enable(void);
extern void amd_iommu_disable(void);
extern int amd_iommu_reenable(int);
extern int amd_iommu_enable_faulting(void);
iommu/amd: Detect and enable guest vAPIC support This patch introduces a new IOMMU driver parameter, amd_iommu_guest_ir, which can be used to specify different interrupt remapping mode for passthrough devices to VM guest: * legacy: Legacy interrupt remapping (w/ 32-bit IRTE) * vapic : Guest vAPIC interrupt remapping (w/ GA mode 128-bit IRTE) Note that in vapic mode, it can also supports legacy interrupt remapping for non-passthrough devices with the 128-bit IRTE. Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-08-23 21:52:32 +03:00
extern int amd_iommu_guest_ir;
iommu/amd: Add initialization routines for AMD interrupt remapping Add the six routines required to setup interrupt remapping with the AMD IOMMU. Also put it all together into the AMD specific irq_remap_ops. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-26 18:46:04 +04:00
iommu/amd: Implement notifier for PPR faults Add a notifer at which a module can attach to get informed about incoming PPR faults. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-10 22:13:51 +04:00
/* IOMMUv2 specific functions */
iommu/amd: Add amd_iommu_domain_direct_map function This function can be used to switch a domain into paging-mode 0. In this mode all devices can access physical system memory directly without any remapping. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-17 17:18:46 +04:00
struct iommu_domain;
iommu/amd: Add iommuv2 flag to struct amd_iommu In mixed IOMMU setups this flag inidicates whether an IOMMU supports the v2 features or not. This patch also adds a global flag together with a function to query that flag from other code. The flag shows if at least one IOMMUv2 is in the system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-28 18:11:02 +04:00
extern bool amd_iommu_v2_supported(void);
iommu/amd: Implement notifier for PPR faults Add a notifer at which a module can attach to get informed about incoming PPR faults. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-10 22:13:51 +04:00
extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
iommu/amd: Add amd_iommu_domain_direct_map function This function can be used to switch a domain into paging-mode 0. In this mode all devices can access physical system memory directly without any remapping. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-17 17:18:46 +04:00
extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
iommu/amd: Add support for IOMMUv2 domain mode This patch adds support for protection domains that implement two-level paging for devices. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-17 20:24:28 +04:00
extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
iommu/amd: Implement IOMMUv2 TLB flushing routines The functions added with this patch allow to manage the IOMMU and the device TLBs for all devices in an IOMMUv2 domain. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-21 18:59:08 +04:00
extern int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
u64 address);
extern int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid);
iommu/amd: Implement functions to manage GCR3 table This patch adds functions necessary to set and clear the GCR3 values associated with a particular PASID in an IOMMUv2 domain. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-21 19:50:23 +04:00
extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
unsigned long cr3);
extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);
iommu/amd: Add function to get IOMMUv2 domain for pdev The AMD IOMMUv2 driver needs to get the IOMMUv2 domain associated with a particular device. This patch adds a function to get this information. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-23 15:36:25 +04:00
extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
iommu/amd: Implement functions to manage GCR3 table This patch adds functions necessary to set and clear the GCR3 values associated with a particular PASID in an IOMMUv2 domain. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-21 19:50:23 +04:00
irq_remapping/amd: Enhance AMD IR driver to support hierarchical irqdomains Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Acked-by: Joerg Roedel <jroedel@suse.de> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: David Cohen <david.a.cohen@linux.intel.com> Cc: Sander Eikelenboom <linux@eikelenboom.it> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: iommu@lists.linux-foundation.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Joerg Roedel <joro@8bytes.org> Link: http://lkml.kernel.org/r/1428905519-23704-12-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-04-13 09:11:33 +03:00
#ifdef CONFIG_IRQ_REMAP
extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
#else
static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
{
return 0;
}
#endif
iommu/amd: Implement function to send PPR completions To send completions for PPR requests this patch adds a function which can be used by the IOMMUv2 driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-21 21:19:25 +04:00
#define PPR_SUCCESS 0x0
#define PPR_INVALID 0x1
#define PPR_FAILURE 0xf
extern int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid,
int status, int tag);
iommu/amd: Add iommuv2 flag to struct amd_iommu In mixed IOMMU setups this flag inidicates whether an IOMMU supports the v2 features or not. This patch also adds a global flag together with a function to query that flag from other code. The flag shows if at least one IOMMUv2 is in the system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-28 18:11:02 +04:00
x86/amd-iommu: Work around S3 BIOS bug This patch adds a workaround for an IOMMU BIOS problem to the AMD IOMMU driver. The result of the bug is that the IOMMU does not execute commands anymore when the system comes out of the S3 state resulting in system failure. The bug in the BIOS is that is does not restore certain hardware specific registers correctly. This workaround reads out the contents of these registers at boot time and restores them on resume from S3. The workaround is limited to the specific IOMMU chipset where this problem occurs. Cc: stable@kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2010-09-23 17:15:19 +04:00
static inline bool is_rd890_iommu(struct pci_dev *pdev)
{
return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
(pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
}
x86/amd-iommu: Add extended feature detection This patch adds detection of the extended features of an AMD IOMMU. The available features are printed to dmesg on boot. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-04-11 13:03:18 +04:00
static inline bool iommu_feature(struct amd_iommu *iommu, u64 f)
{
if (!(iommu->cap & (1 << IOMMU_CAP_EFR)))
return false;
return !!(iommu->features & f);
}
iommu/amd: Allow the AMD IOMMU to work with memory encryption The IOMMU is programmed with physical addresses for the various tables and buffers that are used to communicate between the device and the driver. When the driver allocates this memory it is encrypted. In order for the IOMMU to access the memory as encrypted the encryption mask needs to be included in these physical addresses during configuration. The PTE entries created by the IOMMU should also include the encryption mask so that when the device behind the IOMMU performs a DMA, the DMA will be performed to encrypted memory. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Acked-by: Joerg Roedel <jroedel@suse.de> Cc: <iommu@lists.linux-foundation.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/3053631ea25ba8b1601c351cb7c541c496f6d9bc.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-18 00:10:24 +03:00
static inline u64 iommu_virt_to_phys(void *vaddr)
{
return (u64)__sme_set(virt_to_phys(vaddr));
}
static inline void *iommu_phys_to_virt(unsigned long paddr)
{
return phys_to_virt(__sme_clr(paddr));
}
iommu/amd: Detect pre enabled translation Add functions to check whether translation is already enabled in IOMMU. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-09 11:33:33 +03:00
extern bool translation_pre_enabled(struct amd_iommu *iommu);
iommu/amd: Don't copy GCR3 table root pointer When iommu is pre_enabled in kdump kernel, if a device is set up with guest translations (DTE.GV=1), then don't copy GCR3 table root pointer but move the device over to an empty guest-cr3 table and handle the faults in the PPR log (which answer them with INVALID). After all these PPR faults are recoverable for the device and we should not allow the device to change old-kernels data when we don't have to. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-09 11:33:43 +03:00
extern struct iommu_dev_data *get_dev_data(struct device *dev);
x86/amd-iommu: Separate internal interface definitions This patch moves all function declarations which are only used inside the driver code to a seperate header file. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-20 15:22:21 +03:00
#endif /* _ASM_X86_AMD_IOMMU_PROTO_H */
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