qemu-e2k/hw/ppc/pnv_bmc.c

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/*
* QEMU PowerNV, BMC related functions
*
* Copyright (c) 2016-2017, IBM Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "target/ppc/cpu.h"
#include "qemu/log.h"
#include "hw/ipmi/ipmi.h"
#include "hw/ppc/fdt.h"
#include "hw/ppc/pnv.h"
#include <libfdt.h>
/* TODO: include definition in ipmi.h */
#define IPMI_SDR_FULL_TYPE 1
/*
* OEM SEL Event data packet sent by BMC in response of a Read Event
* Message Buffer command
*/
typedef struct OemSel {
/* SEL header */
uint8_t id[2];
uint8_t type;
uint8_t timestamp[4];
uint8_t manuf_id[3];
/* OEM SEL data (6 bytes) follows */
uint8_t netfun;
uint8_t cmd;
uint8_t data[4];
} OemSel;
#define SOFT_OFF 0x00
#define SOFT_REBOOT 0x01
static bool pnv_bmc_is_simulator(IPMIBmc *bmc)
{
return object_dynamic_cast(OBJECT(bmc), TYPE_IPMI_BMC_SIMULATOR);
}
static void pnv_gen_oem_sel(IPMIBmc *bmc, uint8_t reboot)
{
/* IPMI SEL Event are 16 bytes long */
OemSel sel = {
.id = { 0x55 , 0x55 },
.type = 0xC0, /* OEM */
.manuf_id = { 0x0, 0x0, 0x0 },
.timestamp = { 0x0, 0x0, 0x0, 0x0 },
.netfun = 0x3A, /* IBM */
.cmd = 0x04, /* AMI OEM SEL Power Notification */
.data = { reboot, 0xFF, 0xFF, 0xFF },
};
ipmi_bmc_gen_event(bmc, (uint8_t *) &sel, 0 /* do not log the event */);
}
void pnv_bmc_powerdown(IPMIBmc *bmc)
{
pnv_gen_oem_sel(bmc, SOFT_OFF);
}
void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt)
{
int offset;
int i;
const struct ipmi_sdr_compact *sdr;
uint16_t nextrec;
if (!pnv_bmc_is_simulator(bmc)) {
return;
}
offset = fdt_add_subnode(fdt, 0, "bmc");
_FDT(offset);
_FDT((fdt_setprop_string(fdt, offset, "name", "bmc")));
offset = fdt_add_subnode(fdt, offset, "sensors");
_FDT(offset);
_FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1)));
_FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0)));
for (i = 0; !ipmi_bmc_sdr_find(bmc, i, &sdr, &nextrec); i++) {
int off;
char *name;
if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE &&
sdr->header.rec_type != IPMI_SDR_FULL_TYPE) {
continue;
}
name = g_strdup_printf("sensor@%x", sdr->sensor_owner_number);
off = fdt_add_subnode(fdt, offset, name);
_FDT(off);
g_free(name);
_FDT((fdt_setprop_cell(fdt, off, "reg", sdr->sensor_owner_number)));
_FDT((fdt_setprop_string(fdt, off, "name", "sensor")));
_FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,ipmi-sensor")));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-reading-type",
sdr->reading_type)));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-id",
sdr->entity_id)));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-instance",
sdr->entity_instance)));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-type",
sdr->sensor_type)));
}
}
/*
* HIOMAP protocol handler
*/
#define HIOMAP_C_RESET 1
#define HIOMAP_C_GET_INFO 2
#define HIOMAP_C_GET_FLASH_INFO 3
#define HIOMAP_C_CREATE_READ_WINDOW 4
#define HIOMAP_C_CLOSE_WINDOW 5
#define HIOMAP_C_CREATE_WRITE_WINDOW 6
#define HIOMAP_C_MARK_DIRTY 7
#define HIOMAP_C_FLUSH 8
#define HIOMAP_C_ACK 9
#define HIOMAP_C_ERASE 10
#define HIOMAP_C_DEVICE_NAME 11
#define HIOMAP_C_LOCK 12
#define BLOCK_SHIFT 12 /* 4K */
static uint16_t bytes_to_blocks(uint32_t bytes)
{
return bytes >> BLOCK_SHIFT;
}
static uint32_t blocks_to_bytes(uint16_t blocks)
{
return blocks << BLOCK_SHIFT;
}
static int hiomap_erase(PnvPnor *pnor, uint32_t offset, uint32_t size)
{
MemTxResult result;
int i;
for (i = 0; i < size / 4; i++) {
result = memory_region_dispatch_write(&pnor->mmio, offset + i * 4,
0xFFFFFFFF, MO_32,
MEMTXATTRS_UNSPECIFIED);
if (result != MEMTX_OK) {
return -1;
}
}
return 0;
}
static void hiomap_cmd(IPMIBmcSim *ibs, uint8_t *cmd, unsigned int cmd_len,
RspBuffer *rsp)
{
PnvPnor *pnor = PNV_PNOR(object_property_get_link(OBJECT(ibs), "pnor",
&error_abort));
uint32_t pnor_size = pnor->size;
uint32_t pnor_addr = PNOR_SPI_OFFSET;
bool readonly = false;
rsp_buffer_push(rsp, cmd[2]);
rsp_buffer_push(rsp, cmd[3]);
switch (cmd[2]) {
case HIOMAP_C_MARK_DIRTY:
case HIOMAP_C_FLUSH:
case HIOMAP_C_ACK:
break;
case HIOMAP_C_ERASE:
if (hiomap_erase(pnor, blocks_to_bytes(cmd[5] << 8 | cmd[4]),
blocks_to_bytes(cmd[7] << 8 | cmd[6]))) {
rsp_buffer_set_error(rsp, IPMI_CC_UNSPECIFIED);
}
break;
case HIOMAP_C_GET_INFO:
rsp_buffer_push(rsp, 2); /* Version 2 */
rsp_buffer_push(rsp, BLOCK_SHIFT); /* block size */
rsp_buffer_push(rsp, 0); /* Timeout */
rsp_buffer_push(rsp, 0); /* Timeout */
break;
case HIOMAP_C_GET_FLASH_INFO:
rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF);
rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8);
rsp_buffer_push(rsp, 0x01); /* erase size */
rsp_buffer_push(rsp, 0x00); /* erase size */
break;
case HIOMAP_C_CREATE_READ_WINDOW:
readonly = true;
/* Fall through */
case HIOMAP_C_CREATE_WRITE_WINDOW:
memory_region_set_readonly(&pnor->mmio, readonly);
memory_region_set_enabled(&pnor->mmio, true);
rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) & 0xFF);
rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) >> 8);
rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF);
rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8);
rsp_buffer_push(rsp, 0x00); /* offset */
rsp_buffer_push(rsp, 0x00); /* offset */
break;
case HIOMAP_C_CLOSE_WINDOW:
memory_region_set_enabled(&pnor->mmio, false);
break;
case HIOMAP_C_DEVICE_NAME:
case HIOMAP_C_RESET:
case HIOMAP_C_LOCK:
default:
qemu_log_mask(LOG_GUEST_ERROR, "HIOMAP: unknown command %02X\n", cmd[2]);
break;
}
}
#define HIOMAP 0x5a
static const IPMICmdHandler hiomap_cmds[] = {
[HIOMAP] = { hiomap_cmd, 3 },
};
static const IPMINetfn hiomap_netfn = {
.cmd_nums = ARRAY_SIZE(hiomap_cmds),
.cmd_handlers = hiomap_cmds
};
void pnv_bmc_set_pnor(IPMIBmc *bmc, PnvPnor *pnor)
{
if (!pnv_bmc_is_simulator(bmc)) {
return;
}
object_ref(OBJECT(pnor));
qom: Drop parameter @errp of object_property_add() & friends The only way object_property_add() can fail is when a property with the same name already exists. Since our property names are all hardcoded, failure is a programming error, and the appropriate way to handle it is passing &error_abort. Same for its variants, except for object_property_add_child(), which additionally fails when the child already has a parent. Parentage is also under program control, so this is a programming error, too. We have a bit over 500 callers. Almost half of them pass &error_abort, slightly fewer ignore errors, one test case handles errors, and the remaining few callers pass them to their own callers. The previous few commits demonstrated once again that ignoring programming errors is a bad idea. Of the few ones that pass on errors, several violate the Error API. The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. ich9_pm_add_properties(), sparc32_ledma_realize(), sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize() are wrong that way. When the one appropriate choice of argument is &error_abort, letting users pick the argument is a bad idea. Drop parameter @errp and assert the preconditions instead. There's one exception to "duplicate property name is a programming error": the way object_property_add() implements the magic (and undocumented) "automatic arrayification". Don't drop @errp there. Instead, rename object_property_add() to object_property_try_add(), and add the obvious wrapper object_property_add(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-15-armbru@redhat.com> [Two semantic rebase conflicts resolved]
2020-05-05 17:29:22 +02:00
object_property_add_const_link(OBJECT(bmc), "pnor", OBJECT(pnor));
/* Install the HIOMAP protocol handlers to access the PNOR */
ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(bmc), IPMI_NETFN_OEM,
&hiomap_netfn);
}
/*
* Instantiate the machine BMC. PowerNV uses the QEMU internal
* simulator but it could also be external.
*/
IPMIBmc *pnv_bmc_create(PnvPnor *pnor)
{
Object *obj;
obj = object_new(TYPE_IPMI_BMC_SIMULATOR);
qdev_realize(DEVICE(obj), NULL, &error_fatal);
pnv_bmc_set_pnor(IPMI_BMC(obj), pnor);
return IPMI_BMC(obj);
}
typedef struct ForeachArgs {
const char *name;
Object *obj;
} ForeachArgs;
static int bmc_find(Object *child, void *opaque)
{
ForeachArgs *args = opaque;
if (object_dynamic_cast(child, args->name)) {
if (args->obj) {
return 1;
}
args->obj = child;
}
return 0;
}
IPMIBmc *pnv_bmc_find(Error **errp)
{
ForeachArgs args = { TYPE_IPMI_BMC, NULL };
int ret;
ret = object_child_foreach_recursive(object_get_root(), bmc_find, &args);
if (ret) {
error_setg(errp, "machine should have only one BMC device. "
"Use '-nodefaults'");
return NULL;
}
return args.obj ? IPMI_BMC(args.obj) : NULL;
}