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ipmi/bmc-sim: Add 'Get Channel Info' command

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Linux issues this command when booting a powernv machine.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <20250401140153.685523-4-npiggin@gmail.com>
Signed-off-by: Corey Minyard <corey@minyard.net>
This commit is contained in:
Nicholas Piggin 2025-04-02 00:01:50 +10:00 • committed by Corey Minyard
parent 7376d10b50
commit 7f9e7af40a
4 changed files with 79 additions and 2 deletions
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68
hw/ipmi/ipmi_bmc_sim.c
View file

@ -70,6 +70,7 @@
#define IPMI_CMD_GET_MSG 0x33
#define IPMI_CMD_SEND_MSG 0x34
#define IPMI_CMD_READ_EVT_MSG_BUF 0x35
#define IPMI_CMD_GET_CHANNEL_INFO 0x42
#define IPMI_NETFN_STORAGE 0x0a
@ -1020,8 +1021,8 @@ static void send_msg(IPMIBmcSim *ibs,
uint8_t *buf;
uint8_t netfn, rqLun, rsLun, rqSeq;
if (cmd[2] != 0) {
/* We only handle channel 0 with no options */
if (cmd[2] != IPMI_CHANNEL_IPMB) {
/* We only handle channel 0h (IPMB) with no options */
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
@ -1219,6 +1220,68 @@ static void get_watchdog_timer(IPMIBmcSim *ibs,
}
}
static void get_channel_info(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
IPMIInterface *s = ibs->parent.intf;
IPMIInterfaceClass *k = IPMI_INTERFACE_GET_CLASS(s);
IPMIFwInfo info = {};
uint8_t ch = cmd[2] & 0x0f;
/* Only define channel 0h (IPMB) and Fh (system interface) */
if (ch == 0x0e) { /* "This channel" */
ch = IPMI_CHANNEL_SYSTEM;
}
rsp_buffer_push(rsp, ch);
if (ch != IPMI_CHANNEL_IPMB && ch != IPMI_CHANNEL_SYSTEM) {
/* Not a supported channel */
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
if (k->get_fwinfo) {
k->get_fwinfo(s, &info);
}
if (ch == IPMI_CHANNEL_IPMB) {
rsp_buffer_push(rsp, IPMI_CHANNEL_MEDIUM_IPMB);
rsp_buffer_push(rsp, IPMI_CHANNEL_PROTOCOL_IPMB);
} else { /* IPMI_CHANNEL_SYSTEM */
rsp_buffer_push(rsp, IPMI_CHANNEL_MEDIUM_SYSTEM);
rsp_buffer_push(rsp, info.ipmi_channel_protocol);
}
rsp_buffer_push(rsp, 0x00); /* Session-less */
/* IPMI Enterprise Number for Vendor ID */
rsp_buffer_push(rsp, 0xf2);
rsp_buffer_push(rsp, 0x1b);
rsp_buffer_push(rsp, 0x00);
if (ch == IPMI_CHANNEL_SYSTEM) {
uint8_t irq;
if (info.irq_source == IPMI_ISA_IRQ) {
irq = info.interrupt_number;
} else if (info.irq_source == IPMI_PCI_IRQ) {
irq = 0x10 + info.interrupt_number;
} else {
irq = 0xff; /* no interrupt / unspecified */
}
/* Both interrupts use the same irq number */
rsp_buffer_push(rsp, irq);
rsp_buffer_push(rsp, irq);
} else {
/* Reserved */
rsp_buffer_push(rsp, 0x00);
rsp_buffer_push(rsp, 0x00);
}
}
static void get_sdr_rep_info(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
@ -2015,6 +2078,7 @@ static const IPMICmdHandler app_cmds[] = {
[IPMI_CMD_RESET_WATCHDOG_TIMER] = { reset_watchdog_timer },
[IPMI_CMD_SET_WATCHDOG_TIMER] = { set_watchdog_timer, 8 },
[IPMI_CMD_GET_WATCHDOG_TIMER] = { get_watchdog_timer },
[IPMI_CMD_GET_CHANNEL_INFO] = { get_channel_info, 3 },
};
static const IPMINetfn app_netfn = {
.cmd_nums = ARRAY_SIZE(app_cmds),

2
hw/ipmi/ipmi_bt.c
View file

@ -419,6 +419,8 @@ void ipmi_bt_get_fwinfo(struct IPMIBT *ib, IPMIFwInfo *info)
info->interface_type = IPMI_SMBIOS_BT;
info->ipmi_spec_major_revision = 2;
info->ipmi_spec_minor_revision = 0;
/* BT System Interface Format, IPMI v1.5 */
info->ipmi_channel_protocol = IPMI_CHANNEL_PROTOCOL_BT_15;
info->base_address = ib->io_base;
info->register_length = ib->io_length;
info->register_spacing = 1;

1
hw/ipmi/ipmi_kcs.c
View file

@ -405,6 +405,7 @@ void ipmi_kcs_get_fwinfo(IPMIKCS *ik, IPMIFwInfo *info)
info->interface_type = IPMI_SMBIOS_KCS;
info->ipmi_spec_major_revision = 2;
info->ipmi_spec_minor_revision = 0;
info->ipmi_channel_protocol = IPMI_CHANNEL_PROTOCOL_KCS;
info->base_address = ik->io_base;
info->i2c_slave_address = ik->bmc->slave_addr;
info->register_length = ik->io_length;

10
include/hw/ipmi/ipmi.h
View file

@ -41,6 +41,15 @@ enum ipmi_op {
IPMI_SEND_NMI
};
/* Channel properties */
#define IPMI_CHANNEL_IPMB 0x00
#define IPMI_CHANNEL_SYSTEM 0x0f
#define IPMI_CHANNEL_MEDIUM_IPMB 0x01
#define IPMI_CHANNEL_MEDIUM_SYSTEM 0x0c
#define IPMI_CHANNEL_PROTOCOL_IPMB 0x01
#define IPMI_CHANNEL_PROTOCOL_KCS 0x05
#define IPMI_CHANNEL_PROTOCOL_BT_15 0x08
#define IPMI_CC_INVALID_CMD 0xc1
#define IPMI_CC_COMMAND_INVALID_FOR_LUN 0xc2
#define IPMI_CC_TIMEOUT 0xc3
@ -76,6 +85,7 @@ typedef struct IPMIFwInfo {
int interface_type;
uint8_t ipmi_spec_major_revision;
uint8_t ipmi_spec_minor_revision;
uint8_t ipmi_channel_protocol;
uint8_t i2c_slave_address;
uint32_t uuid;