smmu_acpi.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause
    3  *
    4  * Copyright (c) 2019-2020 Ruslan Bukin <br@bsdpad.com>
    5  *
    6  * This software was developed by SRI International and the University of
    7  * Cambridge Computer Laboratory (Department of Computer Science and
    8  * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
    9  * DARPA SSITH research programme.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #include "opt_acpi.h"
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 #include <sys/types.h>
   39 #include <sys/systm.h>
   40 #include <sys/bus.h>
   41 #include <sys/bitstring.h>
   42 #include <sys/kernel.h>
   43 #include <sys/tree.h>
   44 #include <sys/taskqueue.h>
   45 #include <sys/malloc.h>
   46 #include <sys/module.h>
   47 #include <vm/vm.h>
   48 #include <vm/pmap.h>
   49 #include <contrib/dev/acpica/include/acpi.h>
   50 #include <dev/acpica/acpivar.h>
   51 #include <dev/pci/pcireg.h>
   52 #include <dev/pci/pcivar.h>
   53 #include <dev/iommu/iommu.h>
   54 
   55 #include <arm64/iommu/iommu.h>
   56 
   57 #include "smmuvar.h"
   58 
   59 #define MEMORY_RESOURCE_SIZE    0x20000
   60 #define MAX_SMMU                8
   61 
   62 struct smmu_acpi_devinfo {
   63         struct resource_list    di_rl;
   64 };
   65 
   66 struct iort_table_data {
   67         device_t parent;
   68         device_t dev;
   69         ACPI_IORT_SMMU_V3 *smmu[MAX_SMMU];
   70         int count;
   71 };
   72 
   73 static void
   74 iort_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
   75 {
   76         struct iort_table_data *iort_data;
   77         ACPI_IORT_NODE *node;
   78         int i;
   79 
   80         iort_data = (struct iort_table_data *)arg;
   81         i = iort_data->count;
   82 
   83         switch(entry->Type) {
   84         case ACPI_IORT_NODE_SMMU_V3:
   85                 if (i == MAX_SMMU) {
   86                         printf("SMMUv3 found, but no space available.\n");
   87                         break;
   88                 }
   89 
   90                 if (iort_data->smmu[i] != NULL) {
   91                         if (bootverbose)
   92                                 device_printf(iort_data->parent,
   93                                     "smmu: Already have an SMMU table");
   94                         break;
   95                 }
   96                 node = (ACPI_IORT_NODE *)entry;
   97                 iort_data->smmu[i] = (ACPI_IORT_SMMU_V3 *)node->NodeData;
   98                 iort_data->count++;
   99                 break;
  100         default:
  101                 break;
  102         }
  103 }
  104 
  105 static void
  106 smmu_acpi_identify(driver_t *driver, device_t parent)
  107 {
  108         struct iort_table_data iort_data;
  109         ACPI_TABLE_IORT *iort;
  110         vm_paddr_t iort_pa;
  111         uintptr_t priv;
  112         device_t dev;
  113         int i;
  114 
  115         iort_pa = acpi_find_table(ACPI_SIG_IORT);
  116         if (iort_pa == 0)
  117                 return;
  118 
  119         iort = acpi_map_table(iort_pa, ACPI_SIG_IORT);
  120         if (iort == NULL) {
  121                 device_printf(parent, "smmu: Unable to map the IORT\n");
  122                 return;
  123         }
  124 
  125         iort_data.parent = parent;
  126         for (i = 0; i < MAX_SMMU; i++)
  127                 iort_data.smmu[i] = NULL;
  128         iort_data.count = 0;
  129 
  130         acpi_walk_subtables(iort + 1, (char *)iort + iort->Header.Length,
  131             iort_handler, &iort_data);
  132         if (iort_data.count == 0) {
  133                 device_printf(parent, "No SMMU found.\n");
  134                 goto out;
  135         }
  136 
  137         for (i = 0; i < iort_data.count; i++) {
  138                 dev = BUS_ADD_CHILD(parent,
  139                     BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE, "smmu", -1);
  140                 if (dev == NULL) {
  141                         device_printf(parent, "add smmu child failed\n");
  142                         goto out;
  143                 }
  144 
  145                 /* Add the IORT data */
  146                 BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 0,
  147                     iort_data.smmu[i]->EventGsiv, 1);
  148                 BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 1,
  149                     iort_data.smmu[i]->SyncGsiv, 1);
  150                 BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 2,
  151                     iort_data.smmu[i]->GerrGsiv, 1);
  152                 BUS_SET_RESOURCE(parent, dev, SYS_RES_MEMORY, 0,
  153                     iort_data.smmu[i]->BaseAddress, MEMORY_RESOURCE_SIZE);
  154 
  155                 priv = iort_data.smmu[i]->Flags;
  156                 priv <<= 32;
  157                 priv |= iort_data.smmu[i]->Model;
  158 
  159                 acpi_set_private(dev, (void *)priv);
  160         }
  161 
  162         iort_data.dev = dev;
  163 
  164 out:
  165         acpi_unmap_table(iort);
  166 }
  167 
  168 static int
  169 smmu_acpi_probe(device_t dev)
  170 {
  171 
  172         switch((uintptr_t)acpi_get_private(dev) & 0xffffffff) {
  173         case ACPI_IORT_SMMU_V3_GENERIC:
  174                 /* Generic SMMUv3 */
  175                 break;
  176         default:
  177                 return (ENXIO);
  178         }
  179 
  180         device_set_desc(dev, SMMU_DEVSTR);
  181 
  182         return (BUS_PROBE_NOWILDCARD);
  183 }
  184 
  185 static int
  186 smmu_acpi_attach(device_t dev)
  187 {
  188         struct smmu_softc *sc;
  189         struct smmu_unit *unit;
  190         struct iommu_unit *iommu;
  191         uintptr_t priv;
  192         int err;
  193 
  194         sc = device_get_softc(dev);
  195         sc->dev = dev;
  196 
  197         priv = (uintptr_t)acpi_get_private(dev);
  198         if ((priv >> 32) & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE)
  199                 sc->features |= SMMU_FEATURE_COHERENCY;
  200 
  201         if (bootverbose)
  202                 device_printf(sc->dev, "%s: features %x\n",
  203                     __func__, sc->features);
  204 
  205         err = smmu_attach(dev);
  206         if (err != 0)
  207                 goto error;
  208 
  209         unit = &sc->unit;
  210         unit->dev = dev;
  211 
  212         iommu = &unit->iommu;
  213         iommu->dev = dev;
  214 
  215         LIST_INIT(&unit->domain_list);
  216 
  217         /* Use memory start address as an xref. */
  218         sc->xref = bus_get_resource_start(dev, SYS_RES_MEMORY, 0);
  219 
  220         err = iommu_register(iommu);
  221         if (err) {
  222                 device_printf(dev, "Failed to register SMMU.\n");
  223                 return (ENXIO);
  224         }
  225 
  226         return (0);
  227 
  228 error:
  229         if (bootverbose) {
  230                 device_printf(dev,
  231                     "Failed to attach. Error %d\n", err);
  232         }
  233         /* Failure so free resources. */
  234         smmu_detach(dev);
  235 
  236         return (err);
  237 }
  238 
  239 static device_method_t smmu_acpi_methods[] = {
  240         /* Device interface */
  241         DEVMETHOD(device_identify,              smmu_acpi_identify),
  242         DEVMETHOD(device_probe,                 smmu_acpi_probe),
  243         DEVMETHOD(device_attach,                smmu_acpi_attach),
  244 
  245         /* End */
  246         DEVMETHOD_END
  247 };
  248 
  249 DEFINE_CLASS_1(smmu, smmu_acpi_driver, smmu_acpi_methods,
  250     sizeof(struct smmu_softc), smmu_driver);
  251 
  252 static devclass_t smmu_acpi_devclass;
  253 
  254 EARLY_DRIVER_MODULE(smmu, acpi, smmu_acpi_driver, smmu_acpi_devclass,
  255     0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);

Cache object: 202d1428a4c47a3f632ee3bc503c4893

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

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