hw/ppc/pnv_bmc.c

   1 /*
   2  * QEMU PowerNV, BMC related functions
   3  *
   4  * Copyright (c) 2016-2017, IBM Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "qemu/osdep.h"
  20 #include "hw/hw.h"
  21 #include "sysemu/sysemu.h"
  22 #include "target/ppc/cpu.h"
  23 #include "qapi/error.h"
  24 #include "qemu/log.h"
  25 #include "hw/ipmi/ipmi.h"
  26 #include "hw/ppc/fdt.h"
  27
  28 #include "hw/ppc/pnv.h"
  29
  30 #include <libfdt.h>
  31
  32 /* TODO: include definition in ipmi.h */
  33 #define IPMI_SDR_FULL_TYPE 1
  34
  35 /*
  36  * OEM SEL Event data packet sent by BMC in response of a Read Event
  37  * Message Buffer command
  38  */
  39 typedef struct OemSel {
  40     /* SEL header */
  41     uint8_t id[2];
  42     uint8_t type;
  43     uint8_t timestamp[4];
  44     uint8_t manuf_id[3];
  45
  46     /* OEM SEL data (6 bytes) follows */
  47     uint8_t netfun;
  48     uint8_t cmd;
  49     uint8_t data[4];
  50 } OemSel;
  51
  52 #define SOFT_OFF        0x00
  53 #define SOFT_REBOOT     0x01
  54
  55 static void pnv_gen_oem_sel(IPMIBmc *bmc, uint8_t reboot)
  56 {
  57     /* IPMI SEL Event are 16 bytes long */
  58     OemSel sel = {
  59         .id        = { 0x55 , 0x55 },
  60         .type      = 0xC0, /* OEM */
  61         .manuf_id  = { 0x0, 0x0, 0x0 },
  62         .timestamp = { 0x0, 0x0, 0x0, 0x0 },
  63         .netfun    = 0x3A, /* IBM */
  64         .cmd       = 0x04, /* AMI OEM SEL Power Notification */
  65         .data      = { reboot, 0xFF, 0xFF, 0xFF },
  66     };
  67
  68     ipmi_bmc_gen_event(bmc, (uint8_t *) &sel, 0 /* do not log the event */);
  69 }
  70
  71 void pnv_bmc_powerdown(IPMIBmc *bmc)
  72 {
  73     pnv_gen_oem_sel(bmc, SOFT_OFF);
  74 }
  75
  76 void pnv_bmc_populate_sensors(IPMIBmc *bmc, void *fdt)
  77 {
  78     int offset;
  79     int i;
  80     const struct ipmi_sdr_compact *sdr;
  81     uint16_t nextrec;
  82
  83     offset = fdt_add_subnode(fdt, 0, "/bmc");
  84     _FDT(offset);
  85
  86     _FDT((fdt_setprop_string(fdt, offset, "name", "bmc")));
  87     _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1)));
  88     _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0)));
  89
  90     offset = fdt_add_subnode(fdt, offset, "sensors");
  91     _FDT(offset);
  92
  93     _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1)));
  94     _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0)));
  95
  96     for (i = 0; !ipmi_bmc_sdr_find(bmc, i, &sdr, &nextrec); i++) {
  97         int off;
  98         char *name;
  99
 100         if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE &&
 101             sdr->header.rec_type != IPMI_SDR_FULL_TYPE) {
 102             continue;
 103         }
 104
 105         name = g_strdup_printf("sensor@%x", sdr->sensor_owner_number);
 106         off = fdt_add_subnode(fdt, offset, name);
 107         _FDT(off);
 108         g_free(name);
 109
 110         _FDT((fdt_setprop_cell(fdt, off, "reg", sdr->sensor_owner_number)));
 111         _FDT((fdt_setprop_string(fdt, off, "name", "sensor")));
 112         _FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,ipmi-sensor")));
 113         _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-reading-type",
 114                                sdr->reading_type)));
 115         _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-id",
 116                                sdr->entity_id)));
 117         _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-instance",
 118                                sdr->entity_instance)));
 119         _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-type",
 120                                sdr->sensor_type)));
 121     }
 122 }