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/*
* Copyright 2016 IBM
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef MBOX_H
#define MBOX_H
#include <mtd/mtd-abi.h>
#include <systemd/sd-bus.h>
#include <poll.h>
#include <stdbool.h>
enum api_version {
API_VERSION_INVAL = 0,
API_VERSION_1 = 1,
API_VERSION_2 = 2
};
#define API_MIN_VERSION API_VERSION_1
#define API_MAX_VERSION API_VERSION_2
#define THIS_NAME "Mailbox Daemon"
#define SUB_VERSION 0
/* Command Values */
#define MBOX_C_RESET_STATE 0x01
#define MBOX_C_GET_MBOX_INFO 0x02
#define MBOX_C_GET_FLASH_INFO 0x03
#define MBOX_C_READ_WINDOW 0x04
#define MBOX_C_CLOSE_WINDOW 0x05
#define MBOX_C_WRITE_WINDOW 0x06
#define MBOX_C_WRITE_DIRTY 0x07
#define MBOX_C_WRITE_FLUSH 0x08
#define MBOX_C_ACK 0x09
#define MBOX_C_WRITE_ERASE 0x0a
#define NUM_MBOX_CMDS MBOX_C_WRITE_ERASE
/* Response Values */
#define MBOX_R_SUCCESS 0x01
#define MBOX_R_PARAM_ERROR 0x02
#define MBOX_R_WRITE_ERROR 0x03
#define MBOX_R_SYSTEM_ERROR 0x04
#define MBOX_R_TIMEOUT 0x05
#define MBOX_R_BUSY 0x06
#define MBOX_R_WINDOW_ERROR 0x07
#define MBOX_R_SEQ_ERROR 0x08
/* Argument Flags */
#define FLAGS_NONE 0x00
#define FLAGS_SHORT_LIFETIME 0x01
/* BMC Event Notification */
#define BMC_EVENT_REBOOT 0x01
#define BMC_EVENT_WINDOW_RESET 0x02
#define BMC_EVENT_ACK_MASK (BMC_EVENT_REBOOT | \
BMC_EVENT_WINDOW_RESET)
#define BMC_EVENT_FLASH_CTRL_LOST 0x40
#define BMC_EVENT_DAEMON_READY 0x80
#define BMC_EVENT_V1_MASK BMC_EVENT_REBOOT
#define BMC_EVENT_V2_MASK (BMC_EVENT_REBOOT | \
BMC_EVENT_WINDOW_RESET | \
BMC_EVENT_FLASH_CTRL_LOST | \
BMC_EVENT_DAEMON_READY)
/* MBOX Registers */
#define MBOX_HOST_PATH "/dev/aspeed-mbox"
#define MBOX_HOST_TIMEOUT_SEC 1
#define MBOX_ARGS_BYTES 11
#define MBOX_REG_BYTES 16
#define MBOX_HOST_EVENT 14
#define MBOX_BMC_EVENT 15
#define BLOCK_SIZE_SHIFT_V1 12 /* 4K */
/* Window Dirty/Erase bytemap masks */
#define WINDOW_CLEAN 0x00
#define WINDOW_DIRTY 0x01
#define WINDOW_ERASED 0x02
/* Put polled file descriptors first */
#define DBUS_FD 0
#define MBOX_FD 1
#define SIG_FD 2
#define POLL_FDS 3 /* Number of FDs we poll on */
#define LPC_CTRL_FD 3
#define MTD_FD 4
#define TOTAL_FDS 5
#define MAPS_FLASH (1 << 0)
#define MAPS_MEM (1 << 1)
#define STATE_SUSPENDED (1 << 7)
enum mbox_state {
/* Still Initing */
UNINITIALISED = 0,
/* Active and LPC Maps Flash */
ACTIVE_MAPS_FLASH = MAPS_FLASH,
/* Suspended and LPC Maps Flash */
SUSPEND_MAPS_FLASH = STATE_SUSPENDED | MAPS_FLASH,
/* Active and LPC Maps Memory */
ACTIVE_MAPS_MEM = MAPS_MEM,
/* Suspended and LPC Maps Memory */
SUSPEND_MAPS_MEM = STATE_SUSPENDED | MAPS_MEM
};
#define FLASH_OFFSET_UNINIT 0xFFFFFFFF
struct window_context {
void *mem; /* Portion of Reserved Memory Region */
uint32_t flash_offset; /* Flash area the window maps (bytes) */
uint32_t size; /* Window Size (bytes) power-of-2 */
uint8_t *dirty_bmap; /* Bytemap of the dirty/erased state */
uint32_t age; /* Used for LRU eviction scheme */
};
struct window_list {
uint32_t num;
uint32_t max_age;
uint32_t default_size;
struct window_context *window;
};
struct mbox_context {
/* System State */
enum mbox_state state;
enum api_version version;
struct pollfd fds[TOTAL_FDS];
sd_bus *bus;
bool terminate;
uint8_t bmc_events;
uint8_t prev_seq;
/* Window State */
/* The window list struct containing all current "windows" */
struct window_list windows;
/* The window the host is currently pointed at */
struct window_context *current;
/* Is the current window a write one */
bool current_is_write;
/* Memory & Flash State */
/* Reserved Memory Region */
void *mem;
/* Reserved Mem Size (bytes) */
uint32_t mem_size;
/* LPC Bus Base Address (bytes) */
uint32_t lpc_base;
/* Flash size from command line (bytes) */
uint32_t flash_size;
/* Bytemap of the erased state of the entire flash */
uint8_t *flash_bmap;
/* Erase size (as a shift) */
uint32_t erase_size_shift;
/* Block size (as a shift) */
uint32_t block_size_shift;
/* Actual Flash Info */
struct mtd_info_user mtd_info;
};
#endif /* MBOX_H */