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ipmi_bmc_sim.c
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ipmi_bmc_sim.c
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/*
* IPMI BMC emulation
*
* Copyright (c) 2015 Corey Minyard, MontaVista Software, LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "qemu/timer.h"
#include "hw/ipmi/ipmi.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
#include "hw/loader.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#define IPMI_NETFN_CHASSIS 0x00
#define IPMI_CMD_GET_CHASSIS_CAPABILITIES 0x00
#define IPMI_CMD_GET_CHASSIS_STATUS 0x01
#define IPMI_CMD_CHASSIS_CONTROL 0x02
#define IPMI_CMD_GET_SYS_RESTART_CAUSE 0x09
#define IPMI_NETFN_SENSOR_EVENT 0x04
#define IPMI_CMD_PLATFORM_EVENT_MSG 0x02
#define IPMI_CMD_SET_SENSOR_EVT_ENABLE 0x28
#define IPMI_CMD_GET_SENSOR_EVT_ENABLE 0x29
#define IPMI_CMD_REARM_SENSOR_EVTS 0x2a
#define IPMI_CMD_GET_SENSOR_EVT_STATUS 0x2b
#define IPMI_CMD_GET_SENSOR_READING 0x2d
#define IPMI_CMD_SET_SENSOR_TYPE 0x2e
#define IPMI_CMD_GET_SENSOR_TYPE 0x2f
#define IPMI_CMD_SET_SENSOR_READING 0x30
/* #define IPMI_NETFN_APP 0x06 In ipmi.h */
#define IPMI_CMD_GET_DEVICE_ID 0x01
#define IPMI_CMD_COLD_RESET 0x02
#define IPMI_CMD_WARM_RESET 0x03
#define IPMI_CMD_SET_ACPI_POWER_STATE 0x06
#define IPMI_CMD_GET_ACPI_POWER_STATE 0x07
#define IPMI_CMD_GET_DEVICE_GUID 0x08
#define IPMI_CMD_RESET_WATCHDOG_TIMER 0x22
#define IPMI_CMD_SET_WATCHDOG_TIMER 0x24
#define IPMI_CMD_GET_WATCHDOG_TIMER 0x25
#define IPMI_CMD_SET_BMC_GLOBAL_ENABLES 0x2e
#define IPMI_CMD_GET_BMC_GLOBAL_ENABLES 0x2f
#define IPMI_CMD_CLR_MSG_FLAGS 0x30
#define IPMI_CMD_GET_MSG_FLAGS 0x31
#define IPMI_CMD_GET_MSG 0x33
#define IPMI_CMD_SEND_MSG 0x34
#define IPMI_CMD_READ_EVT_MSG_BUF 0x35
#define IPMI_NETFN_STORAGE 0x0a
#define IPMI_CMD_GET_SDR_REP_INFO 0x20
#define IPMI_CMD_GET_SDR_REP_ALLOC_INFO 0x21
#define IPMI_CMD_RESERVE_SDR_REP 0x22
#define IPMI_CMD_GET_SDR 0x23
#define IPMI_CMD_ADD_SDR 0x24
#define IPMI_CMD_PARTIAL_ADD_SDR 0x25
#define IPMI_CMD_DELETE_SDR 0x26
#define IPMI_CMD_CLEAR_SDR_REP 0x27
#define IPMI_CMD_GET_SDR_REP_TIME 0x28
#define IPMI_CMD_SET_SDR_REP_TIME 0x29
#define IPMI_CMD_ENTER_SDR_REP_UPD_MODE 0x2A
#define IPMI_CMD_EXIT_SDR_REP_UPD_MODE 0x2B
#define IPMI_CMD_RUN_INIT_AGENT 0x2C
#define IPMI_CMD_GET_FRU_AREA_INFO 0x10
#define IPMI_CMD_READ_FRU_DATA 0x11
#define IPMI_CMD_WRITE_FRU_DATA 0x12
#define IPMI_CMD_GET_SEL_INFO 0x40
#define IPMI_CMD_GET_SEL_ALLOC_INFO 0x41
#define IPMI_CMD_RESERVE_SEL 0x42
#define IPMI_CMD_GET_SEL_ENTRY 0x43
#define IPMI_CMD_ADD_SEL_ENTRY 0x44
#define IPMI_CMD_PARTIAL_ADD_SEL_ENTRY 0x45
#define IPMI_CMD_DELETE_SEL_ENTRY 0x46
#define IPMI_CMD_CLEAR_SEL 0x47
#define IPMI_CMD_GET_SEL_TIME 0x48
#define IPMI_CMD_SET_SEL_TIME 0x49
/* Same as a timespec struct. */
struct ipmi_time {
long tv_sec;
long tv_nsec;
};
#define MAX_SEL_SIZE 128
typedef struct IPMISel {
uint8_t sel[MAX_SEL_SIZE][16];
unsigned int next_free;
long time_offset;
uint16_t reservation;
uint8_t last_addition[4];
uint8_t last_clear[4];
uint8_t overflow;
} IPMISel;
#define MAX_SDR_SIZE 16384
typedef struct IPMISdr {
uint8_t sdr[MAX_SDR_SIZE];
unsigned int next_free;
uint16_t next_rec_id;
uint16_t reservation;
uint8_t last_addition[4];
uint8_t last_clear[4];
uint8_t overflow;
} IPMISdr;
typedef struct IPMIFru {
char *filename;
unsigned int nentries;
uint16_t areasize;
uint8_t *data;
} IPMIFru;
typedef struct IPMISensor {
uint8_t status;
uint8_t reading;
uint16_t states_suppt;
uint16_t assert_suppt;
uint16_t deassert_suppt;
uint16_t states;
uint16_t assert_states;
uint16_t deassert_states;
uint16_t assert_enable;
uint16_t deassert_enable;
uint8_t sensor_type;
uint8_t evt_reading_type_code;
} IPMISensor;
#define IPMI_SENSOR_GET_PRESENT(s) ((s)->status & 0x01)
#define IPMI_SENSOR_SET_PRESENT(s, v) ((s)->status = (s->status & ~0x01) | \
!!(v))
#define IPMI_SENSOR_GET_SCAN_ON(s) ((s)->status & 0x40)
#define IPMI_SENSOR_SET_SCAN_ON(s, v) ((s)->status = (s->status & ~0x40) | \
((!!(v)) << 6))
#define IPMI_SENSOR_GET_EVENTS_ON(s) ((s)->status & 0x80)
#define IPMI_SENSOR_SET_EVENTS_ON(s, v) ((s)->status = (s->status & ~0x80) | \
((!!(v)) << 7))
#define IPMI_SENSOR_GET_RET_STATUS(s) ((s)->status & 0xc0)
#define IPMI_SENSOR_SET_RET_STATUS(s, v) ((s)->status = (s->status & ~0xc0) | \
(v & 0xc0))
#define IPMI_SENSOR_IS_DISCRETE(s) ((s)->evt_reading_type_code != 1)
#define MAX_SENSORS 20
#define IPMI_WATCHDOG_SENSOR 0
#define MAX_NETFNS 64
typedef struct IPMIRcvBufEntry {
QTAILQ_ENTRY(IPMIRcvBufEntry) entry;
uint8_t len;
uint8_t buf[MAX_IPMI_MSG_SIZE];
} IPMIRcvBufEntry;
struct IPMIBmcSim {
IPMIBmc parent;
QEMUTimer *timer;
uint8_t bmc_global_enables;
uint8_t msg_flags;
bool watchdog_initialized;
uint8_t watchdog_use;
uint8_t watchdog_action;
uint8_t watchdog_pretimeout; /* In seconds */
bool watchdog_expired;
uint16_t watchdog_timeout; /* in 100's of milliseconds */
bool watchdog_running;
bool watchdog_preaction_ran;
int64_t watchdog_expiry;
uint8_t device_id;
uint8_t ipmi_version;
uint8_t device_rev;
uint8_t fwrev1;
uint8_t fwrev2;
uint32_t mfg_id;
uint16_t product_id;
uint8_t restart_cause;
uint8_t acpi_power_state[2];
QemuUUID uuid;
IPMISel sel;
IPMISdr sdr;
IPMIFru fru;
IPMISensor sensors[MAX_SENSORS];
char *sdr_filename;
/* Odd netfns are for responses, so we only need the even ones. */
const IPMINetfn *netfns[MAX_NETFNS / 2];
/* We allow one event in the buffer */
uint8_t evtbuf[16];
QTAILQ_HEAD(, IPMIRcvBufEntry) rcvbufs;
};
#define IPMI_BMC_MSG_FLAG_WATCHDOG_TIMEOUT_MASK (1 << 3)
#define IPMI_BMC_MSG_FLAG_EVT_BUF_FULL (1 << 1)
#define IPMI_BMC_MSG_FLAG_RCV_MSG_QUEUE (1 << 0)
#define IPMI_BMC_MSG_FLAG_WATCHDOG_TIMEOUT_MASK_SET(s) \
(IPMI_BMC_MSG_FLAG_WATCHDOG_TIMEOUT_MASK & (s)->msg_flags)
#define IPMI_BMC_MSG_FLAG_EVT_BUF_FULL_SET(s) \
(IPMI_BMC_MSG_FLAG_EVT_BUF_FULL & (s)->msg_flags)
#define IPMI_BMC_MSG_FLAG_RCV_MSG_QUEUE_SET(s) \
(IPMI_BMC_MSG_FLAG_RCV_MSG_QUEUE & (s)->msg_flags)
#define IPMI_BMC_RCV_MSG_QUEUE_INT_BIT 0
#define IPMI_BMC_EVBUF_FULL_INT_BIT 1
#define IPMI_BMC_EVENT_MSG_BUF_BIT 2
#define IPMI_BMC_EVENT_LOG_BIT 3
#define IPMI_BMC_MSG_INTS_ON(s) ((s)->bmc_global_enables & \
(1 << IPMI_BMC_RCV_MSG_QUEUE_INT_BIT))
#define IPMI_BMC_EVBUF_FULL_INT_ENABLED(s) ((s)->bmc_global_enables & \
(1 << IPMI_BMC_EVBUF_FULL_INT_BIT))
#define IPMI_BMC_EVENT_LOG_ENABLED(s) ((s)->bmc_global_enables & \
(1 << IPMI_BMC_EVENT_LOG_BIT))
#define IPMI_BMC_EVENT_MSG_BUF_ENABLED(s) ((s)->bmc_global_enables & \
(1 << IPMI_BMC_EVENT_MSG_BUF_BIT))
#define IPMI_BMC_WATCHDOG_USE_MASK 0xc7
#define IPMI_BMC_WATCHDOG_ACTION_MASK 0x77
#define IPMI_BMC_WATCHDOG_GET_USE(s) ((s)->watchdog_use & 0x7)
#define IPMI_BMC_WATCHDOG_GET_DONT_LOG(s) (((s)->watchdog_use >> 7) & 0x1)
#define IPMI_BMC_WATCHDOG_GET_DONT_STOP(s) (((s)->watchdog_use >> 6) & 0x1)
#define IPMI_BMC_WATCHDOG_GET_PRE_ACTION(s) (((s)->watchdog_action >> 4) & 0x7)
#define IPMI_BMC_WATCHDOG_PRE_NONE 0
#define IPMI_BMC_WATCHDOG_PRE_SMI 1
#define IPMI_BMC_WATCHDOG_PRE_NMI 2
#define IPMI_BMC_WATCHDOG_PRE_MSG_INT 3
#define IPMI_BMC_WATCHDOG_GET_ACTION(s) ((s)->watchdog_action & 0x7)
#define IPMI_BMC_WATCHDOG_ACTION_NONE 0
#define IPMI_BMC_WATCHDOG_ACTION_RESET 1
#define IPMI_BMC_WATCHDOG_ACTION_POWER_DOWN 2
#define IPMI_BMC_WATCHDOG_ACTION_POWER_CYCLE 3
#define RSP_BUFFER_INITIALIZER { }
static inline void rsp_buffer_pushmore(RspBuffer *rsp, uint8_t *bytes,
unsigned int n)
{
if (rsp->len + n >= sizeof(rsp->buffer)) {
rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_TRUNCATED);
return;
}
memcpy(&rsp->buffer[rsp->len], bytes, n);
rsp->len += n;
}
static void ipmi_sim_handle_timeout(IPMIBmcSim *ibs);
static void ipmi_gettime(struct ipmi_time *time)
{
int64_t stime;
stime = qemu_clock_get_ns(QEMU_CLOCK_HOST);
time->tv_sec = stime / 1000000000LL;
time->tv_nsec = stime % 1000000000LL;
}
static int64_t ipmi_getmonotime(void)
{
return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
}
static void ipmi_timeout(void *opaque)
{
IPMIBmcSim *ibs = opaque;
ipmi_sim_handle_timeout(ibs);
}
static void set_timestamp(IPMIBmcSim *ibs, uint8_t *ts)
{
unsigned int val;
struct ipmi_time now;
ipmi_gettime(&now);
val = now.tv_sec + ibs->sel.time_offset;
ts[0] = val & 0xff;
ts[1] = (val >> 8) & 0xff;
ts[2] = (val >> 16) & 0xff;
ts[3] = (val >> 24) & 0xff;
}
static void sdr_inc_reservation(IPMISdr *sdr)
{
sdr->reservation++;
if (sdr->reservation == 0) {
sdr->reservation = 1;
}
}
static int sdr_add_entry(IPMIBmcSim *ibs,
const struct ipmi_sdr_header *sdrh_entry,
unsigned int len, uint16_t *recid)
{
struct ipmi_sdr_header *sdrh =
(struct ipmi_sdr_header *) &ibs->sdr.sdr[ibs->sdr.next_free];
if ((len < IPMI_SDR_HEADER_SIZE) || (len > 255)) {
return 1;
}
if (ipmi_sdr_length(sdrh_entry) != len) {
return 1;
}
if (ibs->sdr.next_free + len > MAX_SDR_SIZE) {
ibs->sdr.overflow = 1;
return 1;
}
memcpy(sdrh, sdrh_entry, len);
sdrh->rec_id[0] = ibs->sdr.next_rec_id & 0xff;
sdrh->rec_id[1] = (ibs->sdr.next_rec_id >> 8) & 0xff;
sdrh->sdr_version = 0x51; /* Conform to IPMI 1.5 spec */
if (recid) {
*recid = ibs->sdr.next_rec_id;
}
ibs->sdr.next_rec_id++;
set_timestamp(ibs, ibs->sdr.last_addition);
ibs->sdr.next_free += len;
sdr_inc_reservation(&ibs->sdr);
return 0;
}
static int sdr_find_entry(IPMISdr *sdr, uint16_t recid,
unsigned int *retpos, uint16_t *nextrec)
{
unsigned int pos = *retpos;
while (pos < sdr->next_free) {
struct ipmi_sdr_header *sdrh =
(struct ipmi_sdr_header *) &sdr->sdr[pos];
uint16_t trec = ipmi_sdr_recid(sdrh);
unsigned int nextpos = pos + ipmi_sdr_length(sdrh);
if (trec == recid) {
if (nextrec) {
if (nextpos >= sdr->next_free) {
*nextrec = 0xffff;
} else {
*nextrec = (sdr->sdr[nextpos] |
(sdr->sdr[nextpos + 1] << 8));
}
}
*retpos = pos;
return 0;
}
pos = nextpos;
}
return 1;
}
int ipmi_bmc_sdr_find(IPMIBmc *b, uint16_t recid,
const struct ipmi_sdr_compact **sdr, uint16_t *nextrec)
{
IPMIBmcSim *ibs = IPMI_BMC_SIMULATOR(b);
unsigned int pos;
pos = 0;
if (sdr_find_entry(&ibs->sdr, recid, &pos, nextrec)) {
return -1;
}
*sdr = (const struct ipmi_sdr_compact *) &ibs->sdr.sdr[pos];
return 0;
}
static void sel_inc_reservation(IPMISel *sel)
{
sel->reservation++;
if (sel->reservation == 0) {
sel->reservation = 1;
}
}
/* Returns 1 if the SEL is full and can't hold the event. */
static int sel_add_event(IPMIBmcSim *ibs, uint8_t *event)
{
uint8_t ts[4];
event[0] = 0xff;
event[1] = 0xff;
set_timestamp(ibs, ts);
if (event[2] < 0xe0) { /* Don't set timestamps for type 0xe0-0xff. */
memcpy(event + 3, ts, 4);
}
if (ibs->sel.next_free == MAX_SEL_SIZE) {
ibs->sel.overflow = 1;
return 1;
}
event[0] = ibs->sel.next_free & 0xff;
event[1] = (ibs->sel.next_free >> 8) & 0xff;
memcpy(ibs->sel.last_addition, ts, 4);
memcpy(ibs->sel.sel[ibs->sel.next_free], event, 16);
ibs->sel.next_free++;
sel_inc_reservation(&ibs->sel);
return 0;
}
static int attn_set(IPMIBmcSim *ibs)
{
return IPMI_BMC_MSG_FLAG_RCV_MSG_QUEUE_SET(ibs)
|| IPMI_BMC_MSG_FLAG_EVT_BUF_FULL_SET(ibs)
|| IPMI_BMC_MSG_FLAG_WATCHDOG_TIMEOUT_MASK_SET(ibs);
}
static int attn_irq_enabled(IPMIBmcSim *ibs)
{
return (IPMI_BMC_MSG_INTS_ON(ibs) &&
(IPMI_BMC_MSG_FLAG_RCV_MSG_QUEUE_SET(ibs) ||
IPMI_BMC_MSG_FLAG_WATCHDOG_TIMEOUT_MASK_SET(ibs)))
|| (IPMI_BMC_EVBUF_FULL_INT_ENABLED(ibs) &&
IPMI_BMC_MSG_FLAG_EVT_BUF_FULL_SET(ibs));
}
void ipmi_bmc_gen_event(IPMIBmc *b, uint8_t *evt, bool log)
{
IPMIBmcSim *ibs = IPMI_BMC_SIMULATOR(b);
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
if (!IPMI_BMC_EVENT_MSG_BUF_ENABLED(ibs)) {
return;
}
if (log && IPMI_BMC_EVENT_LOG_ENABLED(ibs)) {
sel_add_event(ibs, evt);
}
if (ibs->msg_flags & IPMI_BMC_MSG_FLAG_EVT_BUF_FULL) {
goto out;
}
memcpy(ibs->evtbuf, evt, 16);
ibs->msg_flags |= IPMI_BMC_MSG_FLAG_EVT_BUF_FULL;
k->set_atn(s, 1, attn_irq_enabled(ibs));
out:
return;
}
static void gen_event(IPMIBmcSim *ibs, unsigned int sens_num, uint8_t deassert,
uint8_t evd1, uint8_t evd2, uint8_t evd3)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
uint8_t evt[16];
IPMISensor *sens = ibs->sensors + sens_num;
if (!IPMI_BMC_EVENT_MSG_BUF_ENABLED(ibs)) {
return;
}
if (!IPMI_SENSOR_GET_EVENTS_ON(sens)) {
return;
}
evt[2] = 0x2; /* System event record */
evt[7] = ibs->parent.slave_addr;
evt[8] = 0;
evt[9] = 0x04; /* Format version */
evt[10] = sens->sensor_type;
evt[11] = sens_num;
evt[12] = sens->evt_reading_type_code | (!!deassert << 7);
evt[13] = evd1;
evt[14] = evd2;
evt[15] = evd3;
if (IPMI_BMC_EVENT_LOG_ENABLED(ibs)) {
sel_add_event(ibs, evt);
}
if (ibs->msg_flags & IPMI_BMC_MSG_FLAG_EVT_BUF_FULL) {
return;
}
memcpy(ibs->evtbuf, evt, 16);
ibs->msg_flags |= IPMI_BMC_MSG_FLAG_EVT_BUF_FULL;
k->set_atn(s, 1, attn_irq_enabled(ibs));
}
static void sensor_set_discrete_bit(IPMIBmcSim *ibs, unsigned int sensor,
unsigned int bit, unsigned int val,
uint8_t evd1, uint8_t evd2, uint8_t evd3)
{
IPMISensor *sens;
uint16_t mask;
if (sensor >= MAX_SENSORS) {
return;
}
if (bit >= 16) {
return;
}
mask = (1 << bit);
sens = ibs->sensors + sensor;
if (val) {
sens->states |= mask & sens->states_suppt;
if (sens->assert_states & mask) {
return; /* Already asserted */
}
sens->assert_states |= mask & sens->assert_suppt;
if (sens->assert_enable & mask & sens->assert_states) {
/* Send an event on assert */
gen_event(ibs, sensor, 0, evd1, evd2, evd3);
}
} else {
sens->states &= ~(mask & sens->states_suppt);
if (sens->deassert_states & mask) {
return; /* Already deasserted */
}
sens->deassert_states |= mask & sens->deassert_suppt;
if (sens->deassert_enable & mask & sens->deassert_states) {
/* Send an event on deassert */
gen_event(ibs, sensor, 1, evd1, evd2, evd3);
}
}
}
static void ipmi_init_sensors_from_sdrs(IPMIBmcSim *s)
{
unsigned int i, pos;
IPMISensor *sens;
for (i = 0; i < MAX_SENSORS; i++) {
memset(s->sensors + i, 0, sizeof(*sens));
}
pos = 0;
for (i = 0; !sdr_find_entry(&s->sdr, i, &pos, NULL); i++) {
struct ipmi_sdr_compact *sdr =
(struct ipmi_sdr_compact *) &s->sdr.sdr[pos];
unsigned int len = sdr->header.rec_length;
if (len < 20) {
continue;
}
if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE) {
continue; /* Not a sensor SDR we set from */
}
if (sdr->sensor_owner_number >= MAX_SENSORS) {
continue;
}
sens = s->sensors + sdr->sensor_owner_number;
IPMI_SENSOR_SET_PRESENT(sens, 1);
IPMI_SENSOR_SET_SCAN_ON(sens, (sdr->sensor_init >> 6) & 1);
IPMI_SENSOR_SET_EVENTS_ON(sens, (sdr->sensor_init >> 5) & 1);
sens->assert_suppt = sdr->assert_mask[0] | (sdr->assert_mask[1] << 8);
sens->deassert_suppt =
sdr->deassert_mask[0] | (sdr->deassert_mask[1] << 8);
sens->states_suppt =
sdr->discrete_mask[0] | (sdr->discrete_mask[1] << 8);
sens->sensor_type = sdr->sensor_type;
sens->evt_reading_type_code = sdr->reading_type & 0x7f;
/* Enable all the events that are supported. */
sens->assert_enable = sens->assert_suppt;
sens->deassert_enable = sens->deassert_suppt;
}
}
int ipmi_sim_register_netfn(IPMIBmcSim *s, unsigned int netfn,
const IPMINetfn *netfnd)
{
if ((netfn & 1) || (netfn >= MAX_NETFNS) || (s->netfns[netfn / 2])) {
return -1;
}
s->netfns[netfn / 2] = netfnd;
return 0;
}
static const IPMICmdHandler *ipmi_get_handler(IPMIBmcSim *ibs,
unsigned int netfn,
unsigned int cmd)
{
const IPMICmdHandler *hdl;
if (netfn & 1 || netfn >= MAX_NETFNS || !ibs->netfns[netfn / 2]) {
return NULL;
}
if (cmd >= ibs->netfns[netfn / 2]->cmd_nums) {
return NULL;
}
hdl = &ibs->netfns[netfn / 2]->cmd_handlers[cmd];
if (!hdl->cmd_handler) {
return NULL;
}
return hdl;
}
static void next_timeout(IPMIBmcSim *ibs)
{
int64_t next;
if (ibs->watchdog_running) {
next = ibs->watchdog_expiry;
} else {
/* Wait a minute */
next = ipmi_getmonotime() + 60 * 1000000000LL;
}
timer_mod_ns(ibs->timer, next);
}
static void ipmi_sim_handle_command(IPMIBmc *b,
uint8_t *cmd, unsigned int cmd_len,
unsigned int max_cmd_len,
uint8_t msg_id)
{
IPMIBmcSim *ibs = IPMI_BMC_SIMULATOR(b);
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
const IPMICmdHandler *hdl;
RspBuffer rsp = RSP_BUFFER_INITIALIZER;
/* Set up the response, set the low bit of NETFN. */
/* Note that max_rsp_len must be at least 3 */
if (sizeof(rsp.buffer) < 3) {
rsp_buffer_set_error(&rsp, IPMI_CC_REQUEST_DATA_TRUNCATED);
goto out;
}
rsp_buffer_push(&rsp, cmd[0] | 0x04);
rsp_buffer_push(&rsp, cmd[1]);
rsp_buffer_push(&rsp, 0); /* Assume success */
/* If it's too short or it was truncated, return an error. */
if (cmd_len < 2) {
rsp_buffer_set_error(&rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID);
goto out;
}
if (cmd_len > max_cmd_len) {
rsp_buffer_set_error(&rsp, IPMI_CC_REQUEST_DATA_TRUNCATED);
goto out;
}
if ((cmd[0] & 0x03) != 0) {
/* Only have stuff on LUN 0 */
rsp_buffer_set_error(&rsp, IPMI_CC_COMMAND_INVALID_FOR_LUN);
goto out;
}
hdl = ipmi_get_handler(ibs, cmd[0] >> 2, cmd[1]);
if (!hdl) {
rsp_buffer_set_error(&rsp, IPMI_CC_INVALID_CMD);
goto out;
}
if (cmd_len < hdl->cmd_len_min) {
rsp_buffer_set_error(&rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID);
goto out;
}
hdl->cmd_handler(ibs, cmd, cmd_len, &rsp);
out:
k->handle_rsp(s, msg_id, rsp.buffer, rsp.len);
next_timeout(ibs);
}
static void ipmi_sim_handle_timeout(IPMIBmcSim *ibs)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
if (!ibs->watchdog_running) {
goto out;
}
if (!ibs->watchdog_preaction_ran) {
switch (IPMI_BMC_WATCHDOG_GET_PRE_ACTION(ibs)) {
case IPMI_BMC_WATCHDOG_PRE_NMI:
ibs->msg_flags |= IPMI_BMC_MSG_FLAG_WATCHDOG_TIMEOUT_MASK;
k->do_hw_op(s, IPMI_SEND_NMI, 0);
sensor_set_discrete_bit(ibs, IPMI_WATCHDOG_SENSOR, 8, 1,
0xc8, (2 << 4) | 0xf, 0xff);
break;
case IPMI_BMC_WATCHDOG_PRE_MSG_INT:
ibs->msg_flags |= IPMI_BMC_MSG_FLAG_WATCHDOG_TIMEOUT_MASK;
k->set_atn(s, 1, attn_irq_enabled(ibs));
sensor_set_discrete_bit(ibs, IPMI_WATCHDOG_SENSOR, 8, 1,
0xc8, (3 << 4) | 0xf, 0xff);
break;
default:
goto do_full_expiry;
}
ibs->watchdog_preaction_ran = 1;
/* Issued the pretimeout, do the rest of the timeout now. */
ibs->watchdog_expiry = ipmi_getmonotime();
ibs->watchdog_expiry += ibs->watchdog_pretimeout * 1000000000LL;
goto out;
}
do_full_expiry:
ibs->watchdog_running = 0; /* Stop the watchdog on a timeout */
ibs->watchdog_expired |= (1 << IPMI_BMC_WATCHDOG_GET_USE(ibs));
switch (IPMI_BMC_WATCHDOG_GET_ACTION(ibs)) {
case IPMI_BMC_WATCHDOG_ACTION_NONE:
sensor_set_discrete_bit(ibs, IPMI_WATCHDOG_SENSOR, 0, 1,
0xc0, ibs->watchdog_use & 0xf, 0xff);
break;
case IPMI_BMC_WATCHDOG_ACTION_RESET:
sensor_set_discrete_bit(ibs, IPMI_WATCHDOG_SENSOR, 1, 1,
0xc1, ibs->watchdog_use & 0xf, 0xff);
k->do_hw_op(s, IPMI_RESET_CHASSIS, 0);
break;
case IPMI_BMC_WATCHDOG_ACTION_POWER_DOWN:
sensor_set_discrete_bit(ibs, IPMI_WATCHDOG_SENSOR, 2, 1,
0xc2, ibs->watchdog_use & 0xf, 0xff);
k->do_hw_op(s, IPMI_POWEROFF_CHASSIS, 0);
break;
case IPMI_BMC_WATCHDOG_ACTION_POWER_CYCLE:
sensor_set_discrete_bit(ibs, IPMI_WATCHDOG_SENSOR, 2, 1,
0xc3, ibs->watchdog_use & 0xf, 0xff);
k->do_hw_op(s, IPMI_POWERCYCLE_CHASSIS, 0);
break;
}
out:
next_timeout(ibs);
}
static void chassis_capabilities(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
rsp_buffer_push(rsp, 0);
rsp_buffer_push(rsp, ibs->parent.slave_addr);
rsp_buffer_push(rsp, ibs->parent.slave_addr);
rsp_buffer_push(rsp, ibs->parent.slave_addr);
rsp_buffer_push(rsp, ibs->parent.slave_addr);
}
static void chassis_status(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
rsp_buffer_push(rsp, 0x61); /* Unknown power restore, power is on */
rsp_buffer_push(rsp, 0);
rsp_buffer_push(rsp, 0);
rsp_buffer_push(rsp, 0);
}
static void chassis_control(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
switch (cmd[2] & 0xf) {
case 0: /* power down */
rsp_buffer_set_error(rsp, k->do_hw_op(s, IPMI_POWEROFF_CHASSIS, 0));
break;
case 1: /* power up */
rsp_buffer_set_error(rsp, k->do_hw_op(s, IPMI_POWERON_CHASSIS, 0));
break;
case 2: /* power cycle */
rsp_buffer_set_error(rsp, k->do_hw_op(s, IPMI_POWERCYCLE_CHASSIS, 0));
break;
case 3: /* hard reset */
rsp_buffer_set_error(rsp, k->do_hw_op(s, IPMI_RESET_CHASSIS, 0));
break;
case 4: /* pulse diagnostic interrupt */
rsp_buffer_set_error(rsp, k->do_hw_op(s, IPMI_PULSE_DIAG_IRQ, 0));
break;
case 5: /* soft shutdown via ACPI by overtemp emulation */
rsp_buffer_set_error(rsp, k->do_hw_op(s,
IPMI_SHUTDOWN_VIA_ACPI_OVERTEMP, 0));
break;
default:
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
}
static void chassis_get_sys_restart_cause(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
rsp_buffer_push(rsp, ibs->restart_cause & 0xf); /* Restart Cause */
rsp_buffer_push(rsp, 0); /* Channel 0 */
}
static void get_device_id(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
rsp_buffer_push(rsp, ibs->device_id);
rsp_buffer_push(rsp, ibs->device_rev & 0xf);
rsp_buffer_push(rsp, ibs->fwrev1 & 0x7f);
rsp_buffer_push(rsp, ibs->fwrev2);
rsp_buffer_push(rsp, ibs->ipmi_version);
rsp_buffer_push(rsp, 0x07); /* sensor, SDR, and SEL. */
rsp_buffer_push(rsp, ibs->mfg_id & 0xff);
rsp_buffer_push(rsp, (ibs->mfg_id >> 8) & 0xff);
rsp_buffer_push(rsp, (ibs->mfg_id >> 16) & 0xff);
rsp_buffer_push(rsp, ibs->product_id & 0xff);
rsp_buffer_push(rsp, (ibs->product_id >> 8) & 0xff);
}
static void set_global_enables(IPMIBmcSim *ibs, uint8_t val)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
bool irqs_on;
ibs->bmc_global_enables = val;
irqs_on = val & (IPMI_BMC_EVBUF_FULL_INT_BIT |
IPMI_BMC_RCV_MSG_QUEUE_INT_BIT);
k->set_irq_enable(s, irqs_on);
}
static void cold_reset(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
/* Disable all interrupts */
set_global_enables(ibs, 1 << IPMI_BMC_EVENT_LOG_BIT);
if (k->reset) {
k->reset(s, true);
}
}
static void warm_reset(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
if (k->reset) {
k->reset(s, false);
}
}
static void set_acpi_power_state(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
ibs->acpi_power_state[0] = cmd[2];
ibs->acpi_power_state[1] = cmd[3];
}
static void get_acpi_power_state(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
rsp_buffer_push(rsp, ibs->acpi_power_state[0]);
rsp_buffer_push(rsp, ibs->acpi_power_state[1]);
}
static void get_device_guid(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
unsigned int i;
/* An uninitialized uuid is all zeros, use that to know if it is set. */
for (i = 0; i < 16; i++) {
if (ibs->uuid.data[i]) {
goto uuid_set;
}
}
/* No uuid is set, return an error. */
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_CMD);
return;
uuid_set:
for (i = 0; i < 16; i++) {
rsp_buffer_push(rsp, ibs->uuid.data[i]);
}
}
static void set_bmc_global_enables(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
set_global_enables(ibs, cmd[2]);
}
static void get_bmc_global_enables(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
rsp_buffer_push(rsp, ibs->bmc_global_enables);
}
static void clr_msg_flags(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
ibs->msg_flags &= ~cmd[2];
k->set_atn(s, attn_set(ibs), attn_irq_enabled(ibs));
}
static void get_msg_flags(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
rsp_buffer_push(rsp, ibs->msg_flags);
}
static void read_evt_msg_buf(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
unsigned int i;
if (!(ibs->msg_flags & IPMI_BMC_MSG_FLAG_EVT_BUF_FULL)) {
rsp_buffer_set_error(rsp, 0x80);
return;
}
for (i = 0; i < 16; i++) {
rsp_buffer_push(rsp, ibs->evtbuf[i]);
}
ibs->msg_flags &= ~IPMI_BMC_MSG_FLAG_EVT_BUF_FULL;
k->set_atn(s, attn_set(ibs), attn_irq_enabled(ibs));
}
static void get_msg(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
IPMIRcvBufEntry *msg;
if (QTAILQ_EMPTY(&ibs->rcvbufs)) {
rsp_buffer_set_error(rsp, 0x80); /* Queue empty */
goto out;
}
rsp_buffer_push(rsp, 0); /* Channel 0 */
msg = QTAILQ_FIRST(&ibs->rcvbufs);
rsp_buffer_pushmore(rsp, msg->buf, msg->len);
QTAILQ_REMOVE(&ibs->rcvbufs, msg, entry);
g_free(msg);
if (QTAILQ_EMPTY(&ibs->rcvbufs)) {
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
ibs->msg_flags &= ~IPMI_BMC_MSG_FLAG_RCV_MSG_QUEUE;
k->set_atn(s, attn_set(ibs), attn_irq_enabled(ibs));
}
out:
return;
}