smmu_quirks.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause
    3  *
    4  * Copyright (c) 2020 Ruslan Bukin <br@bsdpad.com>
    5  *
    6  * This work was supported by Innovate UK project 105694, "Digital Security
    7  * by Design (DSbD) Technology Platform Prototype".
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 
   31 #include "opt_platform.h"
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 #include <sys/param.h>
   37 #include <sys/bitstring.h>
   38 #include <sys/systm.h>
   39 #include <sys/bus.h>
   40 #include <sys/kernel.h>
   41 #include <sys/tree.h>
   42 #include <sys/taskqueue.h>
   43 #include <sys/sysctl.h>
   44 #include <vm/vm.h>
   45 #include <vm/pmap.h>
   46 #include <dev/pci/pcireg.h>
   47 #include <dev/pci/pcivar.h>
   48 #include <dev/iommu/iommu.h>
   49 
   50 #include "smmuvar.h"
   51 
   52 struct smmu_quirk_entry {
   53         uint16_t vendor;
   54         uint16_t device;
   55         const char *name;
   56         uint8_t event_id;
   57         uintptr_t input_address;
   58 };
   59 
   60 /* List of events that are known and will be silenced. */
   61 static const struct smmu_quirk_entry smmu_quirk_table[] = {
   62         { 0x10ec, 0x8168, "RealTek 8168/8111", 0x10 /* F_TRANSLATION */, 0x0 },
   63         { 0, 0, NULL, 0, 0 },
   64 };
   65 
   66 bool
   67 smmu_quirks_check(device_t dev, u_int sid, uint8_t event_id,
   68     uintptr_t input_addr)
   69 {
   70         const struct smmu_quirk_entry *q;
   71         struct smmu_ctx *ctx;
   72         int i;
   73 
   74         ctx = smmu_ctx_lookup_by_sid(dev, sid);
   75         if (!ctx)
   76                 return (false);
   77 
   78         for (i = 0; smmu_quirk_table[i].vendor != 0; i++) {
   79                 q = &smmu_quirk_table[i];
   80                 if (ctx->vendor == q->vendor &&
   81                     ctx->device == q->device &&
   82                     input_addr == q->input_address &&
   83                     event_id == q->event_id)
   84                         return (true);
   85         }
   86 
   87         return (false);
   88 }

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FreeBSD/Linux Kernel Cross Reference sys/arm64/iommu/smmu_quirks.c

FreeBSD/Linux Kernel Cross Reference
sys/arm64/iommu/smmu_quirks.c