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 "target/ppc/cpu.h"
  21 #include "qemu/log.h"
  22 #include "hw/ipmi/ipmi.h"
  23 #include "hw/ppc/fdt.h"
  24
  25 #include "hw/ppc/pnv.h"
  26
  27 #include <libfdt.h>
  28
  29 /* TODO: include definition in ipmi.h */
  30 #define IPMI_SDR_FULL_TYPE 1
  31
  32 /*
  33  * OEM SEL Event data packet sent by BMC in response of a Read Event
  34  * Message Buffer command
  35  */
  36 typedef struct OemSel {
  37     /* SEL header */
  38     uint8_t id[2];
  39     uint8_t type;
  40     uint8_t timestamp[4];
  41     uint8_t manuf_id[3];
  42
  43     /* OEM SEL data (6 bytes) follows */
  44     uint8_t netfun;
  45     uint8_t cmd;
  46     uint8_t data[4];
  47 } OemSel;
  48
  49 #define SOFT_OFF        0x00
  50 #define SOFT_REBOOT     0x01
  51
  52 static void pnv_gen_oem_sel(IPMIBmc *bmc, uint8_t reboot)
  53 {
  54     /* IPMI SEL Event are 16 bytes long */
  55     OemSel sel = {
  56         .id        = { 0x55 , 0x55 },
  57         .type      = 0xC0, /* OEM */
  58         .manuf_id  = { 0x0, 0x0, 0x0 },
  59         .timestamp = { 0x0, 0x0, 0x0, 0x0 },
  60         .netfun    = 0x3A, /* IBM */
  61         .cmd       = 0x04, /* AMI OEM SEL Power Notification */
  62         .data      = { reboot, 0xFF, 0xFF, 0xFF },
  63     };
  64
  65     ipmi_bmc_gen_event(bmc, (uint8_t *) &sel, 0 /* do not log the event */);
  66 }
  67
  68 void pnv_bmc_powerdown(IPMIBmc *bmc)
  69 {
  70     pnv_gen_oem_sel(bmc, SOFT_OFF);
  71 }
  72
  73 void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt)
  74 {
  75     int offset;
  76     int i;
  77     const struct ipmi_sdr_compact *sdr;
  78     uint16_t nextrec;
  79
  80     offset = fdt_add_subnode(fdt, 0, "bmc");
  81     _FDT(offset);
  82
  83     _FDT((fdt_setprop_string(fdt, offset, "name", "bmc")));
  84     offset = fdt_add_subnode(fdt, offset, "sensors");
  85     _FDT(offset);
  86
  87     _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1)));
  88     _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0)));
  89
  90     for (i = 0; !ipmi_bmc_sdr_find(bmc, i, &sdr, &nextrec); i++) {
  91         int off;
  92         char *name;
  93
  94         if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE &&
  95             sdr->header.rec_type != IPMI_SDR_FULL_TYPE) {
  96             continue;
  97         }
  98
  99         name = g_strdup_printf("sensor@%x", sdr->sensor_owner_number);
 100         off = fdt_add_subnode(fdt, offset, name);
 101         _FDT(off);
 102         g_free(name);
 103
 104         _FDT((fdt_setprop_cell(fdt, off, "reg", sdr->sensor_owner_number)));
 105         _FDT((fdt_setprop_string(fdt, off, "name", "sensor")));
 106         _FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,ipmi-sensor")));
 107         _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-reading-type",
 108                                sdr->reading_type)));
 109         _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-id",
 110                                sdr->entity_id)));
 111         _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-instance",
 112                                sdr->entity_instance)));
 113         _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-type",
 114                                sdr->sensor_type)));
 115     }
 116 }
 117
 118 /*
 119  * HIOMAP protocol handler
 120  */
 121 #define HIOMAP_C_RESET                  1
 122 #define HIOMAP_C_GET_INFO               2
 123 #define HIOMAP_C_GET_FLASH_INFO         3
 124 #define HIOMAP_C_CREATE_READ_WINDOW     4
 125 #define HIOMAP_C_CLOSE_WINDOW           5
 126 #define HIOMAP_C_CREATE_WRITE_WINDOW    6
 127 #define HIOMAP_C_MARK_DIRTY             7
 128 #define HIOMAP_C_FLUSH                  8
 129 #define HIOMAP_C_ACK                    9
 130 #define HIOMAP_C_ERASE                  10
 131 #define HIOMAP_C_DEVICE_NAME            11
 132 #define HIOMAP_C_LOCK                   12
 133
 134 #define BLOCK_SHIFT                     12 /* 4K */
 135
 136 static uint16_t bytes_to_blocks(uint32_t bytes)
 137 {
 138     return bytes >> BLOCK_SHIFT;
 139 }
 140
 141 static void hiomap_cmd(IPMIBmcSim *ibs, uint8_t *cmd, unsigned int cmd_len,
 142                        RspBuffer *rsp)
 143 {
 144     PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine());
 145     PnvPnor *pnor = pnv->pnor;
 146     uint32_t pnor_size = pnor->size;
 147     uint32_t pnor_addr = PNOR_SPI_OFFSET;
 148     bool readonly = false;
 149
 150     rsp_buffer_push(rsp, cmd[2]);
 151     rsp_buffer_push(rsp, cmd[3]);
 152
 153     switch (cmd[2]) {
 154     case HIOMAP_C_MARK_DIRTY:
 155     case HIOMAP_C_FLUSH:
 156     case HIOMAP_C_ERASE:
 157     case HIOMAP_C_ACK:
 158         break;
 159
 160     case HIOMAP_C_GET_INFO:
 161         rsp_buffer_push(rsp, 2);  /* Version 2 */
 162         rsp_buffer_push(rsp, BLOCK_SHIFT); /* block size */
 163         rsp_buffer_push(rsp, 0);  /* Timeout */
 164         rsp_buffer_push(rsp, 0);  /* Timeout */
 165         break;
 166
 167     case HIOMAP_C_GET_FLASH_INFO:
 168         rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF);
 169         rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8);
 170         rsp_buffer_push(rsp, 0x01);  /* erase size */
 171         rsp_buffer_push(rsp, 0x00);  /* erase size */
 172         break;
 173
 174     case HIOMAP_C_CREATE_READ_WINDOW:
 175         readonly = true;
 176         /* Fall through */
 177
 178     case HIOMAP_C_CREATE_WRITE_WINDOW:
 179         memory_region_set_readonly(&pnor->mmio, readonly);
 180         memory_region_set_enabled(&pnor->mmio, true);
 181
 182         rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) & 0xFF);
 183         rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) >> 8);
 184         rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF);
 185         rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8);
 186         rsp_buffer_push(rsp, 0x00); /* offset */
 187         rsp_buffer_push(rsp, 0x00); /* offset */
 188         break;
 189
 190     case HIOMAP_C_CLOSE_WINDOW:
 191         memory_region_set_enabled(&pnor->mmio, false);
 192         break;
 193
 194     case HIOMAP_C_DEVICE_NAME:
 195     case HIOMAP_C_RESET:
 196     case HIOMAP_C_LOCK:
 197     default:
 198         qemu_log_mask(LOG_GUEST_ERROR, "HIOMAP: unknow command %02X\n", cmd[2]);
 199         break;
 200     }
 201 }
 202
 203 #define HIOMAP   0x5a
 204
 205 static const IPMICmdHandler hiomap_cmds[] = {
 206     [HIOMAP] = { hiomap_cmd, 3 },
 207 };
 208
 209 static const IPMINetfn hiomap_netfn = {
 210     .cmd_nums = ARRAY_SIZE(hiomap_cmds),
 211     .cmd_handlers = hiomap_cmds
 212 };
 213
 214 int pnv_bmc_hiomap(IPMIBmc *bmc)
 215 {
 216     return ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(bmc),
 217                                    IPMI_NETFN_OEM, &hiomap_netfn);
 218 }