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ipmi: provide support for FRUs 

This patch provides a simple FRU support for the BMC simulator. FRUs
are loaded from a file which name is specified in the object
properties, each entry having a fixed size, also specified in the
properties. If the file is unknown or not accessible for some reason,
a unique entry of 1024 bytes is created as a default. Just enough to
start some simulation.

These commands complies with the IPMI spec : "34. FRU Inventory Device
Commands".

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Corey Minyard <cminyard@mvista.com>
[dwg: Folded in subsequent fix to handle NULL filename]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2017-04-05 14:41:32 +02:00 committed by David Gibson
parent 8c6fd7f341
commit 540c07d345
2 changed files with 139 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

133
hw/ipmi/ipmi_bmc_sim.c
View File

@ -80,6 +80,9 @@
#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
@ -122,6 +125,13 @@ typedef struct IPMISdr {
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;
@ -213,6 +223,7 @@ struct IPMIBmcSim {
IPMISel sel;
IPMISdr sdr;
IPMIFru fru;
IPMISensor sensors[MAX_SENSORS];
char *sdr_filename;
@ -1317,6 +1328,91 @@ static void get_sel_info(IPMIBmcSim *ibs,
rsp_buffer_push(rsp, (ibs->sel.overflow << 7) | 0x02);
}
static void get_fru_area_info(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
uint8_t fruid;
uint16_t fru_entry_size;
fruid = cmd[2];
if (fruid >= ibs->fru.nentries) {
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
fru_entry_size = ibs->fru.areasize;
rsp_buffer_push(rsp, fru_entry_size & 0xff);
rsp_buffer_push(rsp, fru_entry_size >> 8 & 0xff);
rsp_buffer_push(rsp, 0x0);
}
static void read_fru_data(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
uint8_t fruid;
uint16_t offset;
int i;
uint8_t *fru_entry;
unsigned int count;
fruid = cmd[2];
offset = (cmd[3] | cmd[4] << 8);
if (fruid >= ibs->fru.nentries) {
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
if (offset >= ibs->fru.areasize - 1) {
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
fru_entry = &ibs->fru.data[fruid * ibs->fru.areasize];
count = MIN(cmd[5], ibs->fru.areasize - offset);
rsp_buffer_push(rsp, count & 0xff);
for (i = 0; i < count; i++) {
rsp_buffer_push(rsp, fru_entry[offset + i]);
}
}
static void write_fru_data(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
uint8_t fruid;
uint16_t offset;
uint8_t *fru_entry;
unsigned int count;
fruid = cmd[2];
offset = (cmd[3] | cmd[4] << 8);
if (fruid >= ibs->fru.nentries) {
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
if (offset >= ibs->fru.areasize - 1) {
rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD);
return;
}
fru_entry = &ibs->fru.data[fruid * ibs->fru.areasize];
count = MIN(cmd_len - 5, ibs->fru.areasize - offset);
memcpy(fru_entry + offset, cmd + 5, count);
rsp_buffer_push(rsp, count & 0xff);
}
static void reserve_sel(IPMIBmcSim *ibs,
uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
@ -1653,6 +1749,9 @@ static const IPMINetfn app_netfn = {
};
static const IPMICmdHandler storage_cmds[] = {
[IPMI_CMD_GET_FRU_AREA_INFO] = { get_fru_area_info, 3 },
[IPMI_CMD_READ_FRU_DATA] = { read_fru_data, 5 },
[IPMI_CMD_WRITE_FRU_DATA] = { write_fru_data, 5 },
[IPMI_CMD_GET_SDR_REP_INFO] = { get_sdr_rep_info },
[IPMI_CMD_RESERVE_SDR_REP] = { reserve_sdr_rep },
[IPMI_CMD_GET_SDR] = { get_sdr, 8 },
@ -1755,6 +1854,36 @@ static const VMStateDescription vmstate_ipmi_sim = {
}
};
static void ipmi_fru_init(IPMIFru *fru)
{
int fsize;
int size = 0;
if (!fru->filename) {
goto out;
}
fsize = get_image_size(fru->filename);
if (fsize > 0) {
size = QEMU_ALIGN_UP(fsize, fru->areasize);
fru->data = g_malloc0(size);
if (load_image_size(fru->filename, fru->data, fsize) != fsize) {
error_report("Could not load file '%s'", fru->filename);
g_free(fru->data);
fru->data = NULL;
}
}
out:
if (!fru->data) {
/* give one default FRU */
size = fru->areasize;
fru->data = g_malloc0(size);
}
fru->nentries = size / fru->areasize;
}
static void ipmi_sim_realize(DeviceState *dev, Error **errp)
{
IPMIBmc *b = IPMI_BMC(dev);
@ -1776,6 +1905,8 @@ static void ipmi_sim_realize(DeviceState *dev, Error **errp)
ipmi_sdr_init(ibs);
ipmi_fru_init(&ibs->fru);
ibs->acpi_power_state[0] = 0;
ibs->acpi_power_state[1] = 0;
@ -1794,6 +1925,8 @@ static void ipmi_sim_realize(DeviceState *dev, Error **errp)
}
static Property ipmi_sim_properties[] = {
DEFINE_PROP_UINT16("fruareasize", IPMIBmcSim, fru.areasize, 1024),
DEFINE_PROP_STRING("frudatafile", IPMIBmcSim, fru.filename),
DEFINE_PROP_STRING("sdrfile", IPMIBmcSim, sdr_filename),
DEFINE_PROP_END_OF_LIST(),
};

8
qemu-options.hx
View File

@ -425,7 +425,7 @@ possible drivers and properties, use @code{-device help} and
@code{-device @var{driver},help}.
Some drivers are:
@item -device ipmi-bmc-sim,id=@var{id}[,slave_addr=@var{val}][,sdrfile=@var{file}]
@item -device ipmi-bmc-sim,id=@var{id}[,slave_addr=@var{val}][,sdrfile=@var{file}][,furareasize=@var{val}][,furdatafile=@var{file}]
Add an IPMI BMC. This is a simulation of a hardware management
interface processor that normally sits on a system. It provides
@ -443,7 +443,11 @@ The BMC to connect to, one of ipmi-bmc-sim or ipmi-bmc-extern above.
@item slave_addr=@var{val}
Define slave address to use for the BMC. The default is 0x20.
@item sdrfile=@var{file}
file containing raw Sensor Data Records (SDR) data. The default is none.
file containing raw Sensor Data Records (SDR) data. The default is none.
@item fruareasize=@var{val}
size of a Field Replaceable Unit (FRU) area. The default is 1024.
@item frudatafile=@var{file}
file containing raw Field Replaceable Unit (FRU) inventory data. The default is none.
@end table
@item -device ipmi-bmc-extern,id=@var{id},chardev=@var{id}[,slave_addr=@var{val}]