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-rw-r--r--hw/ppc/pnv_bmc.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/hw/ppc/pnv_bmc.c b/hw/ppc/pnv_bmc.c
new file mode 100644
index 00000000..99f1e8d7
--- /dev/null
+++ b/hw/ppc/pnv_bmc.c
@@ -0,0 +1,312 @@
+/*
+ * 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));
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-28 07:57:55 +0000