amdsmn.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * Copyright (c) 2017-2020 Conrad Meyer <cem@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   17  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
   18  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   20  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   22  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   23  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   24  * POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 /*
   28  * Driver for the AMD Family 15h and 17h CPU System Management Network.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #include <sys/param.h>
   35 #include <sys/bus.h>
   36 #include <sys/conf.h>
   37 #include <sys/lock.h>
   38 #include <sys/kernel.h>
   39 #include <sys/module.h>
   40 #include <sys/mutex.h>
   41 #include <sys/sysctl.h>
   42 #include <sys/systm.h>
   43 
   44 #include <machine/cpufunc.h>
   45 #include <machine/cputypes.h>
   46 #include <machine/md_var.h>
   47 #include <machine/specialreg.h>
   48 
   49 #include <dev/pci/pcivar.h>
   50 #include <x86/pci_cfgreg.h>
   51 
   52 #include <dev/amdsmn/amdsmn.h>
   53 
   54 #define F15H_SMN_ADDR_REG       0xb8
   55 #define F15H_SMN_DATA_REG       0xbc
   56 #define F17H_SMN_ADDR_REG       0x60
   57 #define F17H_SMN_DATA_REG       0x64
   58 
   59 #define PCI_DEVICE_ID_AMD_15H_M60H_ROOT         0x1576
   60 #define PCI_DEVICE_ID_AMD_17H_ROOT              0x1450
   61 #define PCI_DEVICE_ID_AMD_17H_M10H_ROOT         0x15d0
   62 #define PCI_DEVICE_ID_AMD_17H_M30H_ROOT         0x1480  /* Also M70H, F19H M00H/M20H */
   63 #define PCI_DEVICE_ID_AMD_17H_M60H_ROOT         0x1630
   64 
   65 struct pciid;
   66 struct amdsmn_softc {
   67         struct mtx smn_lock;
   68         const struct pciid *smn_pciid;
   69 };
   70 
   71 static const struct pciid {
   72         uint16_t        amdsmn_vendorid;
   73         uint16_t        amdsmn_deviceid;
   74         uint8_t         amdsmn_addr_reg;
   75         uint8_t         amdsmn_data_reg;
   76 } amdsmn_ids[] = {
   77         {
   78                 .amdsmn_vendorid = CPU_VENDOR_AMD,
   79                 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_15H_M60H_ROOT,
   80                 .amdsmn_addr_reg = F15H_SMN_ADDR_REG,
   81                 .amdsmn_data_reg = F15H_SMN_DATA_REG,
   82         },
   83         {
   84                 .amdsmn_vendorid = CPU_VENDOR_AMD,
   85                 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_ROOT,
   86                 .amdsmn_addr_reg = F17H_SMN_ADDR_REG,
   87                 .amdsmn_data_reg = F17H_SMN_DATA_REG,
   88         },
   89         {
   90                 .amdsmn_vendorid = CPU_VENDOR_AMD,
   91                 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M10H_ROOT,
   92                 .amdsmn_addr_reg = F17H_SMN_ADDR_REG,
   93                 .amdsmn_data_reg = F17H_SMN_DATA_REG,
   94         },
   95         {
   96                 .amdsmn_vendorid = CPU_VENDOR_AMD,
   97                 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M30H_ROOT,
   98                 .amdsmn_addr_reg = F17H_SMN_ADDR_REG,
   99                 .amdsmn_data_reg = F17H_SMN_DATA_REG,
  100         },
  101         {
  102                 .amdsmn_vendorid = CPU_VENDOR_AMD,
  103                 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M60H_ROOT,
  104                 .amdsmn_addr_reg = F17H_SMN_ADDR_REG,
  105                 .amdsmn_data_reg = F17H_SMN_DATA_REG,
  106         },
  107 };
  108 
  109 /*
  110  * Device methods.
  111  */
  112 static void     amdsmn_identify(driver_t *driver, device_t parent);
  113 static int      amdsmn_probe(device_t dev);
  114 static int      amdsmn_attach(device_t dev);
  115 static int      amdsmn_detach(device_t dev);
  116 
  117 static device_method_t amdsmn_methods[] = {
  118         /* Device interface */
  119         DEVMETHOD(device_identify,      amdsmn_identify),
  120         DEVMETHOD(device_probe,         amdsmn_probe),
  121         DEVMETHOD(device_attach,        amdsmn_attach),
  122         DEVMETHOD(device_detach,        amdsmn_detach),
  123         DEVMETHOD_END
  124 };
  125 
  126 static driver_t amdsmn_driver = {
  127         "amdsmn",
  128         amdsmn_methods,
  129         sizeof(struct amdsmn_softc),
  130 };
  131 
  132 DRIVER_MODULE(amdsmn, hostb, amdsmn_driver, NULL, NULL);
  133 MODULE_VERSION(amdsmn, 1);
  134 MODULE_PNP_INFO("U16:vendor;U16:device", pci, amdsmn, amdsmn_ids,
  135     nitems(amdsmn_ids));
  136 
  137 static bool
  138 amdsmn_match(device_t parent, const struct pciid **pciid_out)
  139 {
  140         uint16_t vendor, device;
  141         size_t i;
  142 
  143         vendor = pci_get_vendor(parent);
  144         device = pci_get_device(parent);
  145 
  146         for (i = 0; i < nitems(amdsmn_ids); i++) {
  147                 if (vendor == amdsmn_ids[i].amdsmn_vendorid &&
  148                     device == amdsmn_ids[i].amdsmn_deviceid) {
  149                         if (pciid_out != NULL)
  150                                 *pciid_out = &amdsmn_ids[i];
  151                         return (true);
  152                 }
  153         }
  154         return (false);
  155 }
  156 
  157 static void
  158 amdsmn_identify(driver_t *driver, device_t parent)
  159 {
  160         device_t child;
  161 
  162         /* Make sure we're not being doubly invoked. */
  163         if (device_find_child(parent, "amdsmn", -1) != NULL)
  164                 return;
  165         if (!amdsmn_match(parent, NULL))
  166                 return;
  167 
  168         child = device_add_child(parent, "amdsmn", -1);
  169         if (child == NULL)
  170                 device_printf(parent, "add amdsmn child failed\n");
  171 }
  172 
  173 static int
  174 amdsmn_probe(device_t dev)
  175 {
  176         uint32_t family;
  177         char buf[64];
  178 
  179         if (resource_disabled("amdsmn", 0))
  180                 return (ENXIO);
  181         if (!amdsmn_match(device_get_parent(dev), NULL))
  182                 return (ENXIO);
  183 
  184         family = CPUID_TO_FAMILY(cpu_id);
  185 
  186         switch (family) {
  187         case 0x15:
  188         case 0x17:
  189         case 0x19:
  190                 break;
  191         default:
  192                 return (ENXIO);
  193         }
  194         snprintf(buf, sizeof(buf), "AMD Family %xh System Management Network",
  195             family);
  196         device_set_desc_copy(dev, buf);
  197 
  198         return (BUS_PROBE_GENERIC);
  199 }
  200 
  201 static int
  202 amdsmn_attach(device_t dev)
  203 {
  204         struct amdsmn_softc *sc = device_get_softc(dev);
  205 
  206         if (!amdsmn_match(device_get_parent(dev), &sc->smn_pciid))
  207                 return (ENXIO);
  208 
  209         mtx_init(&sc->smn_lock, "SMN mtx", "SMN", MTX_DEF);
  210         return (0);
  211 }
  212 
  213 int
  214 amdsmn_detach(device_t dev)
  215 {
  216         struct amdsmn_softc *sc = device_get_softc(dev);
  217 
  218         mtx_destroy(&sc->smn_lock);
  219         return (0);
  220 }
  221 
  222 int
  223 amdsmn_read(device_t dev, uint32_t addr, uint32_t *value)
  224 {
  225         struct amdsmn_softc *sc = device_get_softc(dev);
  226         device_t parent;
  227 
  228         parent = device_get_parent(dev);
  229 
  230         mtx_lock(&sc->smn_lock);
  231         pci_write_config(parent, sc->smn_pciid->amdsmn_addr_reg, addr, 4);
  232         *value = pci_read_config(parent, sc->smn_pciid->amdsmn_data_reg, 4);
  233         mtx_unlock(&sc->smn_lock);
  234 
  235         return (0);
  236 }
  237 
  238 int
  239 amdsmn_write(device_t dev, uint32_t addr, uint32_t value)
  240 {
  241         struct amdsmn_softc *sc = device_get_softc(dev);
  242         device_t parent;
  243 
  244         parent = device_get_parent(dev);
  245 
  246         mtx_lock(&sc->smn_lock);
  247         pci_write_config(parent, sc->smn_pciid->amdsmn_addr_reg, addr, 4);
  248         pci_write_config(parent, sc->smn_pciid->amdsmn_data_reg, value, 4);
  249         mtx_unlock(&sc->smn_lock);
  250 
  251         return (0);
  252 }

Cache object: b5ac08ebe9c746d2127653a8d955b4db

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/amdsmn/amdsmn.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/amdsmn/amdsmn.c