c49761dd57
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
342 lines
6.9 KiB
C
342 lines
6.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/sysctl.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <machine/cpu.h>
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#include <machine/md_var.h>
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#include "vmm_util.h"
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#include "vmm_mem.h"
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#include "iommu.h"
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SYSCTL_DECL(_hw_vmm);
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SYSCTL_NODE(_hw_vmm, OID_AUTO, iommu, CTLFLAG_RW, 0, "bhyve iommu parameters");
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static int iommu_avail;
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SYSCTL_INT(_hw_vmm_iommu, OID_AUTO, initialized, CTLFLAG_RD, &iommu_avail,
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0, "bhyve iommu initialized?");
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static int iommu_enable = 1;
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SYSCTL_INT(_hw_vmm_iommu, OID_AUTO, enable, CTLFLAG_RDTUN, &iommu_enable, 0,
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"Enable use of I/O MMU (required for PCI passthrough).");
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static struct iommu_ops *ops;
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static void *host_domain;
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static eventhandler_tag add_tag, delete_tag;
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static __inline int
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IOMMU_INIT(void)
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{
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if (ops != NULL)
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return ((*ops->init)());
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else
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return (ENXIO);
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}
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static __inline void
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IOMMU_CLEANUP(void)
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{
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if (ops != NULL && iommu_avail)
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(*ops->cleanup)();
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}
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static __inline void *
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IOMMU_CREATE_DOMAIN(vm_paddr_t maxaddr)
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{
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if (ops != NULL && iommu_avail)
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return ((*ops->create_domain)(maxaddr));
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else
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return (NULL);
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}
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static __inline void
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IOMMU_DESTROY_DOMAIN(void *dom)
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{
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if (ops != NULL && iommu_avail)
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(*ops->destroy_domain)(dom);
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}
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static __inline uint64_t
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IOMMU_CREATE_MAPPING(void *domain, vm_paddr_t gpa, vm_paddr_t hpa, uint64_t len)
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{
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if (ops != NULL && iommu_avail)
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return ((*ops->create_mapping)(domain, gpa, hpa, len));
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else
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return (len); /* XXX */
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}
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static __inline uint64_t
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IOMMU_REMOVE_MAPPING(void *domain, vm_paddr_t gpa, uint64_t len)
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{
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if (ops != NULL && iommu_avail)
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return ((*ops->remove_mapping)(domain, gpa, len));
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else
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return (len); /* XXX */
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}
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static __inline void
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IOMMU_ADD_DEVICE(void *domain, uint16_t rid)
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{
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if (ops != NULL && iommu_avail)
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(*ops->add_device)(domain, rid);
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}
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static __inline void
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IOMMU_REMOVE_DEVICE(void *domain, uint16_t rid)
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{
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if (ops != NULL && iommu_avail)
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(*ops->remove_device)(domain, rid);
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}
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static __inline void
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IOMMU_INVALIDATE_TLB(void *domain)
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{
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if (ops != NULL && iommu_avail)
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(*ops->invalidate_tlb)(domain);
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}
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static __inline void
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IOMMU_ENABLE(void)
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{
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if (ops != NULL && iommu_avail)
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(*ops->enable)();
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}
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static __inline void
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IOMMU_DISABLE(void)
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{
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if (ops != NULL && iommu_avail)
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(*ops->disable)();
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}
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static void
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iommu_pci_add(void *arg, device_t dev)
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{
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/* Add new devices to the host domain. */
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iommu_add_device(host_domain, pci_get_rid(dev));
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}
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static void
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iommu_pci_delete(void *arg, device_t dev)
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{
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iommu_remove_device(host_domain, pci_get_rid(dev));
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}
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static void
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iommu_init(void)
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{
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int error, bus, slot, func;
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vm_paddr_t maxaddr;
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devclass_t dc;
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device_t dev;
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if (!iommu_enable)
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return;
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if (vmm_is_intel())
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ops = &iommu_ops_intel;
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else if (vmm_is_amd())
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ops = &iommu_ops_amd;
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else
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ops = NULL;
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error = IOMMU_INIT();
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if (error)
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return;
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iommu_avail = 1;
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/*
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* Create a domain for the devices owned by the host
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*/
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maxaddr = vmm_mem_maxaddr();
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host_domain = IOMMU_CREATE_DOMAIN(maxaddr);
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if (host_domain == NULL) {
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printf("iommu_init: unable to create a host domain");
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IOMMU_CLEANUP();
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ops = NULL;
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iommu_avail = 0;
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return;
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}
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/*
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* Create 1:1 mappings from '0' to 'maxaddr' for devices assigned to
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* the host
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*/
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iommu_create_mapping(host_domain, 0, 0, maxaddr);
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add_tag = EVENTHANDLER_REGISTER(pci_add_device, iommu_pci_add, NULL, 0);
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delete_tag = EVENTHANDLER_REGISTER(pci_delete_device, iommu_pci_delete,
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NULL, 0);
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dc = devclass_find("ppt");
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for (bus = 0; bus <= PCI_BUSMAX; bus++) {
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for (slot = 0; slot <= PCI_SLOTMAX; slot++) {
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for (func = 0; func <= PCI_FUNCMAX; func++) {
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dev = pci_find_dbsf(0, bus, slot, func);
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if (dev == NULL)
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continue;
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/* Skip passthrough devices. */
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if (dc != NULL &&
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device_get_devclass(dev) == dc)
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continue;
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/*
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* Everything else belongs to the host
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* domain.
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*/
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iommu_add_device(host_domain,
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pci_get_rid(dev));
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}
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}
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}
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IOMMU_ENABLE();
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}
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void
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iommu_cleanup(void)
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{
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if (add_tag != NULL) {
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EVENTHANDLER_DEREGISTER(pci_add_device, add_tag);
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add_tag = NULL;
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}
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if (delete_tag != NULL) {
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EVENTHANDLER_DEREGISTER(pci_delete_device, delete_tag);
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delete_tag = NULL;
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}
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IOMMU_DISABLE();
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IOMMU_DESTROY_DOMAIN(host_domain);
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IOMMU_CLEANUP();
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}
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void *
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iommu_create_domain(vm_paddr_t maxaddr)
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{
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static volatile int iommu_initted;
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if (iommu_initted < 2) {
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if (atomic_cmpset_int(&iommu_initted, 0, 1)) {
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iommu_init();
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atomic_store_rel_int(&iommu_initted, 2);
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} else
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while (iommu_initted == 1)
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cpu_spinwait();
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}
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return (IOMMU_CREATE_DOMAIN(maxaddr));
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}
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void
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iommu_destroy_domain(void *dom)
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{
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IOMMU_DESTROY_DOMAIN(dom);
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}
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void
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iommu_create_mapping(void *dom, vm_paddr_t gpa, vm_paddr_t hpa, size_t len)
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{
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uint64_t mapped, remaining;
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remaining = len;
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while (remaining > 0) {
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mapped = IOMMU_CREATE_MAPPING(dom, gpa, hpa, remaining);
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gpa += mapped;
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hpa += mapped;
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remaining -= mapped;
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}
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}
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void
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iommu_remove_mapping(void *dom, vm_paddr_t gpa, size_t len)
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{
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uint64_t unmapped, remaining;
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remaining = len;
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while (remaining > 0) {
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unmapped = IOMMU_REMOVE_MAPPING(dom, gpa, remaining);
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gpa += unmapped;
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remaining -= unmapped;
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}
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}
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void *
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iommu_host_domain(void)
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{
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return (host_domain);
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}
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void
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iommu_add_device(void *dom, uint16_t rid)
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{
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IOMMU_ADD_DEVICE(dom, rid);
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}
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void
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iommu_remove_device(void *dom, uint16_t rid)
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{
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IOMMU_REMOVE_DEVICE(dom, rid);
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}
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void
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iommu_invalidate_tlb(void *domain)
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{
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IOMMU_INVALIDATE_TLB(domain);
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}
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