4cc8701067
This adds an arm64 iommu interface and a driver for Arm System Memory Management Unit version 3.2 (ARM SMMU v3.2) specified in ARM IHI 0070C document. Hardware overview is provided in the header of smmu.c file. The support is disabled by default. To enable add 'options IOMMU' to your kernel configuration file. The support was developed on Arm Neoverse N1 System Development Platform (ARM N1SDP), kindly provided by ARM Ltd. Currently, PCI-based devices and ACPI platforms are supported only. The support was tested on IOMMU-enabled Marvell SATA controller, Realtek Ethernet controller and a TI xHCI USB controller with a low to medium load only. Many thanks to Konstantin Belousov for help forming the generic IOMMU framework that is vital for this project; to Andrew Turner for adding IOMMU support to MSI interrupt code; to Mark Johnston for help with SMMU page management; to John Baldwin for explaining various IOMMU bits. Reviewed by: mmel Relnotes: yes Sponsored by: DARPA / AFRL Sponsored by: Innovate UK (Digital Security by Design programme) Differential Revision: https://reviews.freebsd.org/D24618
126 lines
3.0 KiB
Objective-C
126 lines
3.0 KiB
Objective-C
#-
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# SPDX-License-Identifier: BSD-2-Clause
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#:
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# Copyright (c) 2020 Ruslan Bukin <br@bsdpad.com>
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#
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# This software was developed by SRI International and the University of
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# Cambridge Computer Laboratory (Department of Computer Science and
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# Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
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# DARPA SSITH research programme.
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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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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/types.h>
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#include <sys/taskqueue.h>
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#include <sys/bus.h>
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#include <sys/sysctl.h>
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#include <sys/tree.h>
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#include <vm/vm.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/iommu/iommu.h>
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INTERFACE iommu;
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#
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# Check if the iommu controller dev is responsible to serve traffic
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# for a given child.
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#
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METHOD int find {
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device_t dev;
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device_t child;
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};
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#
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# Map a virtual address VA to a physical address PA.
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#
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METHOD int map {
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device_t dev;
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struct iommu_domain *iodom;
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vm_offset_t va;
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vm_page_t *ma;
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bus_size_t size;
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vm_prot_t prot;
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};
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#
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# Unmap a virtual address VA.
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#
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METHOD int unmap {
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device_t dev;
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struct iommu_domain *iodom;
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vm_offset_t va;
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bus_size_t size;
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};
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#
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# Allocate an IOMMU domain.
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#
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METHOD struct iommu_domain * domain_alloc {
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device_t dev;
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struct iommu_unit *iommu;
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};
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#
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# Release all the resources held by IOMMU domain.
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#
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METHOD void domain_free {
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device_t dev;
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struct iommu_domain *iodom;
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};
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#
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# Find a domain allocated for a dev.
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#
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METHOD struct iommu_domain * domain_lookup {
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device_t dev;
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};
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#
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# Find an allocated context for a device.
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#
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METHOD struct iommu_ctx * ctx_lookup {
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device_t dev;
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device_t child;
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};
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#
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# Allocate a new iommu context.
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#
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METHOD struct iommu_ctx * ctx_alloc {
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device_t dev;
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struct iommu_domain *iodom;
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device_t child;
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bool disabled;
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};
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#
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# Free the iommu context.
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#
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METHOD void ctx_free {
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device_t dev;
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struct iommu_ctx *ioctx;
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};
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