| /* |
| * 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 "qemu-common.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; |
| } |