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