hw/smbios/smbios_type_38.c

   1 /*
   2  * IPMI SMBIOS firmware handling
   3  *
   4  * Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "hw/ipmi/ipmi.h"
  12 #include "hw/firmware/smbios.h"
  13 #include "qemu/error-report.h"
  14 #include "smbios_build.h"
  15
  16 /* SMBIOS type 38 - IPMI */
  17 struct smbios_type_38 {
  18     struct smbios_structure_header header;
  19     uint8_t interface_type;
  20     uint8_t ipmi_spec_revision;
  21     uint8_t i2c_slave_address;
  22     uint8_t nv_storage_device_address;
  23     uint64_t base_address;
  24     uint8_t base_address_modifier;
  25     uint8_t interrupt_number;
  26 } QEMU_PACKED;
  27
  28 static void smbios_build_one_type_38(IPMIFwInfo *info)
  29 {
  30     uint64_t baseaddr = info->base_address;
  31     SMBIOS_BUILD_TABLE_PRE(38, 0x3000, true);
  32
  33     t->interface_type = info->interface_type;
  34     t->ipmi_spec_revision = ((info->ipmi_spec_major_revision << 4)
  35                              | info->ipmi_spec_minor_revision);
  36     t->i2c_slave_address = info->i2c_slave_address;
  37     t->nv_storage_device_address = 0;
  38
  39     assert(info->ipmi_spec_minor_revision <= 15);
  40     assert(info->ipmi_spec_major_revision <= 15);
  41
  42     /* or 1 to set it to I/O space */
  43     switch (info->memspace) {
  44     case IPMI_MEMSPACE_IO:
  45         baseaddr |= 1;
  46         break;
  47     case IPMI_MEMSPACE_MEM32:
  48     case IPMI_MEMSPACE_MEM64:
  49         break;
  50     case IPMI_MEMSPACE_SMBUS:
  51         baseaddr <<= 1;
  52         break;
  53     }
  54
  55     t->base_address = cpu_to_le64(baseaddr);
  56
  57     t->base_address_modifier = 0;
  58     if (info->irq_type == IPMI_LEVEL_IRQ) {
  59         t->base_address_modifier |= 1;
  60     }
  61     switch (info->register_spacing) {
  62     case 1:
  63         break;
  64     case 4:
  65         t->base_address_modifier |= 1 << 6;
  66         break;
  67     case 16:
  68         t->base_address_modifier |= 2 << 6;
  69         break;
  70     default:
  71         error_report("IPMI register spacing %d is not compatible with"
  72                      " SMBIOS, ignoring this entry.", info->register_spacing);
  73         return;
  74     }
  75     t->interrupt_number = info->interrupt_number;
  76
  77     SMBIOS_BUILD_TABLE_POST;
  78 }
  79
  80 static void smbios_add_ipmi_devices(BusState *bus)
  81 {
  82     BusChild *kid;
  83
  84     QTAILQ_FOREACH(kid, &bus->children,  sibling) {
  85         DeviceState *dev = kid->child;
  86         Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_IPMI_INTERFACE);
  87         BusState *childbus;
  88
  89         if (obj) {
  90             IPMIInterface *ii;
  91             IPMIInterfaceClass *iic;
  92             IPMIFwInfo info;
  93
  94             ii = IPMI_INTERFACE(obj);
  95             iic = IPMI_INTERFACE_GET_CLASS(obj);
  96             memset(&info, 0, sizeof(info));
  97             if (!iic->get_fwinfo) {
  98                 continue;
  99             }
 100             iic->get_fwinfo(ii, &info);
 101             smbios_build_one_type_38(&info);
 102             continue;
 103         }
 104
 105         QLIST_FOREACH(childbus, &dev->child_bus, sibling) {
 106             smbios_add_ipmi_devices(childbus);
 107         }
 108     }
 109 }
 110
 111 void smbios_build_type_38_table(void)
 112 {
 113     BusState *bus;
 114
 115     bus = sysbus_get_default();
 116     if (bus) {
 117         smbios_add_ipmi_devices(bus);
 118     }
 119 }