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/rman.h>
   44 #include <sys/tree.h>
   45 #include <sys/taskqueue.h>
   46 #include <sys/malloc.h>
   47 #include <sys/module.h>
   48 #include <vm/vm.h>
   49 #include <vm/pmap.h>
   50 #include <contrib/dev/acpica/include/acpi.h>
   51 #include <dev/acpica/acpivar.h>
   52 #include <dev/pci/pcireg.h>
   53 #include <dev/pci/pcivar.h>
   54 #include <dev/iommu/iommu.h>
   55 
   56 #include <arm64/iommu/iommu.h>
   57 
   58 #include "smmuvar.h"
   59 
   60 #define MEMORY_RESOURCE_SIZE    0x20000
   61 #define MAX_SMMU                8
   62 
   63 struct smmu_acpi_devinfo {
   64         struct resource_list    di_rl;
   65 };
   66 
   67 struct iort_table_data {
   68         device_t parent;
   69         device_t dev;
   70         ACPI_IORT_SMMU_V3 *smmu[MAX_SMMU];
   71         int count;
   72 };
   73 
   74 static void
   75 iort_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
   76 {
   77         struct iort_table_data *iort_data;
   78         ACPI_IORT_NODE *node;
   79         int i;
   80 
   81         iort_data = (struct iort_table_data *)arg;
   82         i = iort_data->count;
   83 
   84         switch(entry->Type) {
   85         case ACPI_IORT_NODE_SMMU_V3:
   86                 if (i == MAX_SMMU) {
   87                         printf("SMMUv3 found, but no space available.\n");
   88                         break;
   89                 }
   90 
   91                 if (iort_data->smmu[i] != NULL) {
   92                         if (bootverbose)
   93                                 device_printf(iort_data->parent,
   94                                     "smmu: Already have an SMMU table");
   95                         break;
   96                 }
   97                 node = (ACPI_IORT_NODE *)entry;
   98                 iort_data->smmu[i] = (ACPI_IORT_SMMU_V3 *)node->NodeData;
   99                 iort_data->count++;
  100                 break;
  101         default:
  102                 break;
  103         }
  104 }
  105 
  106 static void
  107 smmu_acpi_identify(driver_t *driver, device_t parent)
  108 {
  109         struct iort_table_data iort_data;
  110         ACPI_TABLE_IORT *iort;
  111         vm_paddr_t iort_pa;
  112         uintptr_t priv;
  113         device_t dev;
  114         int i;
  115 
  116         iort_pa = acpi_find_table(ACPI_SIG_IORT);
  117         if (iort_pa == 0)
  118                 return;
  119 
  120         iort = acpi_map_table(iort_pa, ACPI_SIG_IORT);
  121         if (iort == NULL) {
  122                 device_printf(parent, "smmu: Unable to map the IORT\n");
  123                 return;
  124         }
  125 
  126         iort_data.parent = parent;
  127         for (i = 0; i < MAX_SMMU; i++)
  128                 iort_data.smmu[i] = NULL;
  129         iort_data.count = 0;
  130 
  131         acpi_walk_subtables(iort + 1, (char *)iort + iort->Header.Length,
  132             iort_handler, &iort_data);
  133         if (iort_data.count == 0) {
  134                 device_printf(parent, "No SMMU found.\n");
  135                 goto out;
  136         }
  137 
  138         for (i = 0; i < iort_data.count; i++) {
  139                 dev = BUS_ADD_CHILD(parent,
  140                     BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE, "smmu", -1);
  141                 if (dev == NULL) {
  142                         device_printf(parent, "add smmu child failed\n");
  143                         goto out;
  144                 }
  145 
  146                 /* Add the IORT data */
  147                 BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 0,
  148                     iort_data.smmu[i]->EventGsiv, 1);
  149                 BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 1,
  150                     iort_data.smmu[i]->PriGsiv, 1);
  151                 BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 2,
  152                     iort_data.smmu[i]->SyncGsiv, 1);
  153                 BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 3,
  154                     iort_data.smmu[i]->GerrGsiv, 1);
  155                 BUS_SET_RESOURCE(parent, dev, SYS_RES_MEMORY, 0,
  156                     iort_data.smmu[i]->BaseAddress, MEMORY_RESOURCE_SIZE);
  157 
  158                 priv = iort_data.smmu[i]->Flags;
  159                 priv <<= 32;
  160                 priv |= iort_data.smmu[i]->Model;
  161 
  162                 acpi_set_private(dev, (void *)priv);
  163         }
  164 
  165         iort_data.dev = dev;
  166 
  167 out:
  168         acpi_unmap_table(iort);
  169 }
  170 
  171 static int
  172 smmu_acpi_probe(device_t dev)
  173 {
  174 
  175         switch((uintptr_t)acpi_get_private(dev) & 0xffffffff) {
  176         case ACPI_IORT_SMMU_V3_GENERIC:
  177                 /* Generic SMMUv3 */
  178                 break;
  179         default:
  180                 return (ENXIO);
  181         }
  182 
  183         device_set_desc(dev, SMMU_DEVSTR);
  184 
  185         return (BUS_PROBE_NOWILDCARD);
  186 }
  187 
  188 static int
  189 smmu_acpi_attach(device_t dev)
  190 {
  191         struct smmu_softc *sc;
  192         struct smmu_unit *unit;
  193         struct iommu_unit *iommu;
  194         uintptr_t priv;
  195         int err;
  196         int rid;
  197 
  198         sc = device_get_softc(dev);
  199         sc->dev = dev;
  200 
  201         priv = (uintptr_t)acpi_get_private(dev);
  202         if ((priv >> 32) & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE)
  203                 sc->features |= SMMU_FEATURE_COHERENCY;
  204 
  205         if (bootverbose)
  206                 device_printf(sc->dev, "%s: features %x\n",
  207                     __func__, sc->features);
  208 
  209         rid = 0;
  210         sc->res[0] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
  211             RF_ACTIVE);
  212         if (sc->res[0] == NULL) {
  213                 device_printf(dev, "Can't allocate memory resource.\n");
  214                 err = ENXIO;
  215                 goto error;
  216         }
  217 
  218         /*
  219          * Interrupt lines are "eventq", "priq", "cmdq-sync", "gerror".
  220          */
  221 
  222         rid = 0;
  223         sc->res[1] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
  224         if (sc->res[1] == NULL) {
  225                 device_printf(dev, "Can't allocate eventq IRQ resource.\n");
  226                 err = ENXIO;
  227                 goto error;
  228         }
  229 
  230         rid = 2;
  231         sc->res[3] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
  232         if (sc->res[3] == NULL) {
  233                 device_printf(dev, "Can't allocate cmdq-sync IRQ resource.\n");
  234                 err = ENXIO;
  235                 goto error;
  236         }
  237 
  238         rid = 3;
  239         sc->res[4] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
  240         if (sc->res[4] == NULL) {
  241                 device_printf(dev, "Can't allocate gerror IRQ resource.\n");
  242                 err = ENXIO;
  243                 goto error;
  244         }
  245 
  246         err = smmu_attach(dev);
  247         if (err != 0)
  248                 goto error;
  249 
  250         unit = &sc->unit;
  251         unit->dev = dev;
  252 
  253         iommu = &unit->iommu;
  254         iommu->dev = dev;
  255 
  256         LIST_INIT(&unit->domain_list);
  257 
  258         /* Use memory start address as an xref. */
  259         sc->xref = bus_get_resource_start(dev, SYS_RES_MEMORY, 0);
  260 
  261         err = iommu_register(iommu);
  262         if (err) {
  263                 device_printf(dev, "Failed to register SMMU.\n");
  264                 return (ENXIO);
  265         }
  266 
  267         return (0);
  268 
  269 error:
  270         if (bootverbose) {
  271                 device_printf(dev,
  272                     "Failed to attach. Error %d\n", err);
  273         }
  274         /* Failure so free resources. */
  275         smmu_detach(dev);
  276 
  277         return (err);
  278 }
  279 
  280 static device_method_t smmu_acpi_methods[] = {
  281         /* Device interface */
  282         DEVMETHOD(device_identify,              smmu_acpi_identify),
  283         DEVMETHOD(device_probe,                 smmu_acpi_probe),
  284         DEVMETHOD(device_attach,                smmu_acpi_attach),
  285 
  286         /* End */
  287         DEVMETHOD_END
  288 };
  289 
  290 DEFINE_CLASS_1(smmu, smmu_acpi_driver, smmu_acpi_methods,
  291     sizeof(struct smmu_softc), smmu_driver);
  292 
  293 EARLY_DRIVER_MODULE(smmu, acpi, smmu_acpi_driver, 0, 0,
  294     BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);

Cache object: 69c11f14a19b90cc6fb7782c89796577

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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