^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * ipmi_ssif.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * The interface to the IPMI driver for SMBus access to a SMBus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * compliant device. Called SSIF by the IPMI spec.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Todd Davis <todd.c.davis@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Rewritten by Corey Minyard <minyard@acm.org> to support the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * non-blocking I2C interface, add support for multi-part
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * transactions, add PEC support, and general clenaup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Copyright 2003 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Copyright 2005 MontaVista Software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * This file holds the "policy" for the interface to the SSIF state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * machine. It does the configuration, handles timers and interrupts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * and drives the real SSIF state machine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define pr_fmt(fmt) "ipmi_ssif: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define dev_fmt(fmt) "ipmi_ssif: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #if defined(MODVERSIONS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/modversions.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/ipmi_smi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/time64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include "ipmi_dmi.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define DEVICE_NAME "ipmi_ssif"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define IPMI_GET_SYSTEM_INTERFACE_CAPABILITIES_CMD 0x57
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define SSIF_IPMI_REQUEST 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define SSIF_IPMI_MULTI_PART_REQUEST_START 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define SSIF_IPMI_MULTI_PART_REQUEST_MIDDLE 7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define SSIF_IPMI_MULTI_PART_REQUEST_END 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define SSIF_IPMI_RESPONSE 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define SSIF_IPMI_MULTI_PART_RESPONSE_MIDDLE 9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* ssif_debug is a bit-field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * SSIF_DEBUG_MSG - commands and their responses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * SSIF_DEBUG_STATES - message states
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * SSIF_DEBUG_TIMING - Measure times between events in the driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define SSIF_DEBUG_TIMING 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define SSIF_DEBUG_STATE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define SSIF_DEBUG_MSG 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define SSIF_NODEBUG 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define SSIF_DEFAULT_DEBUG (SSIF_NODEBUG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * Timer values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define SSIF_MSG_USEC 20000 /* 20ms between message tries. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define SSIF_MSG_PART_USEC 5000 /* 5ms for a message part */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* How many times to we retry sending/receiving the message. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define SSIF_SEND_RETRIES 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define SSIF_RECV_RETRIES 250
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define SSIF_MSG_MSEC (SSIF_MSG_USEC / 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define SSIF_MSG_JIFFIES ((SSIF_MSG_USEC * 1000) / TICK_NSEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define SSIF_MSG_PART_JIFFIES ((SSIF_MSG_PART_USEC * 1000) / TICK_NSEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * Timeout for the watch, only used for get flag timer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define SSIF_WATCH_MSG_TIMEOUT msecs_to_jiffies(10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define SSIF_WATCH_WATCHDOG_TIMEOUT msecs_to_jiffies(250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) enum ssif_intf_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) SSIF_NORMAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) SSIF_GETTING_FLAGS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) SSIF_GETTING_EVENTS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) SSIF_CLEARING_FLAGS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) SSIF_GETTING_MESSAGES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* FIXME - add watchdog stuff. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define SSIF_IDLE(ssif) ((ssif)->ssif_state == SSIF_NORMAL \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) && (ssif)->curr_msg == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Indexes into stats[] in ssif_info below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) enum ssif_stat_indexes {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* Number of total messages sent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) SSIF_STAT_sent_messages = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * Number of message parts sent. Messages may be broken into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * parts if they are long.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) SSIF_STAT_sent_messages_parts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Number of time a message was retried.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) SSIF_STAT_send_retries,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * Number of times the send of a message failed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) SSIF_STAT_send_errors,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * Number of message responses received.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) SSIF_STAT_received_messages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * Number of message fragments received.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) SSIF_STAT_received_message_parts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * Number of times the receive of a message was retried.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) SSIF_STAT_receive_retries,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * Number of errors receiving messages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) SSIF_STAT_receive_errors,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * Number of times a flag fetch was requested.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) SSIF_STAT_flag_fetches,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * Number of times the hardware didn't follow the state machine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) SSIF_STAT_hosed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * Number of received events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) SSIF_STAT_events,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* Number of asyncronous messages received. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) SSIF_STAT_incoming_messages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* Number of watchdog pretimeouts. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) SSIF_STAT_watchdog_pretimeouts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /* Number of alers received. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) SSIF_STAT_alerts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /* Always add statistics before this value, it must be last. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) SSIF_NUM_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct ssif_addr_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct i2c_board_info binfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) char *adapter_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) int slave_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) enum ipmi_addr_src addr_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) union ipmi_smi_info_union addr_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct mutex clients_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct list_head clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct list_head link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct ssif_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) typedef void (*ssif_i2c_done)(struct ssif_info *ssif_info, int result,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) unsigned char *data, unsigned int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct ssif_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct ipmi_smi *intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct ipmi_smi_msg *waiting_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct ipmi_smi_msg *curr_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) enum ssif_intf_state ssif_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) unsigned long ssif_debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct ipmi_smi_handlers handlers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) union ipmi_smi_info_union addr_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * Flags from the last GET_MSG_FLAGS command, used when an ATTN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * is set to hold the flags until we are done handling everything
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * from the flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #define RECEIVE_MSG_AVAIL 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #define EVENT_MSG_BUFFER_FULL 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) #define WDT_PRE_TIMEOUT_INT 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) unsigned char msg_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) u8 global_enables;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) bool has_event_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) bool supports_alert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * Used to tell what we should do with alerts. If we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * waiting on a response, read the data immediately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) bool got_alert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) bool waiting_alert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * If set to true, this will request events the next time the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * state machine is idle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) bool req_events;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * If set to true, this will request flags the next time the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * state machine is idle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) bool req_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * Used to perform timer operations when run-to-completion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) * mode is on. This is a countdown timer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) int rtc_us_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) /* Used for sending/receiving data. +1 for the length. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) unsigned char data[IPMI_MAX_MSG_LENGTH + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) unsigned int data_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /* Temp receive buffer, gets copied into data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) unsigned char recv[I2C_SMBUS_BLOCK_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ssif_i2c_done done_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* Thread interface handling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) struct task_struct *thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct completion wake_thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) bool stopping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int i2c_read_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) int i2c_command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) unsigned char *i2c_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) unsigned int i2c_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct timer_list retry_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) int retries_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) long watch_timeout; /* Timeout for flags check, 0 if off. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct timer_list watch_timer; /* Flag fetch timer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) /* Info from SSIF cmd */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) unsigned char max_xmit_msg_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) unsigned char max_recv_msg_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) bool cmd8_works; /* See test_multipart_messages() for details. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) unsigned int multi_support;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int supports_pec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) #define SSIF_NO_MULTI 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) #define SSIF_MULTI_2_PART 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) #define SSIF_MULTI_n_PART 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) unsigned char *multi_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) unsigned int multi_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) unsigned int multi_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) atomic_t stats[SSIF_NUM_STATS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) #define ssif_inc_stat(ssif, stat) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) atomic_inc(&(ssif)->stats[SSIF_STAT_ ## stat])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) #define ssif_get_stat(ssif, stat) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) ((unsigned int) atomic_read(&(ssif)->stats[SSIF_STAT_ ## stat]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static bool initialized;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static bool platform_registered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static void return_hosed_msg(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct ipmi_smi_msg *msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static void start_next_msg(struct ssif_info *ssif_info, unsigned long *flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static int start_send(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) unsigned char *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) unsigned int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static unsigned long *ipmi_ssif_lock_cond(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) __acquires(&ssif_info->lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) spin_lock_irqsave(&ssif_info->lock, *flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static void ipmi_ssif_unlock_cond(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) __releases(&ssif_info->lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) spin_unlock_irqrestore(&ssif_info->lock, *flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static void deliver_recv_msg(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct ipmi_smi_msg *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (msg->rsp_size < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) return_hosed_msg(ssif_info, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) dev_err(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) "%s: Malformed message: rsp_size = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) __func__, msg->rsp_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ipmi_smi_msg_received(ssif_info->intf, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) static void return_hosed_msg(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct ipmi_smi_msg *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ssif_inc_stat(ssif_info, hosed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) /* Make it a response */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) msg->rsp[0] = msg->data[0] | 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) msg->rsp[1] = msg->data[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) msg->rsp[2] = 0xFF; /* Unknown error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) msg->rsp_size = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) deliver_recv_msg(ssif_info, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * Must be called with the message lock held. This will release the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * message lock. Note that the caller will check SSIF_IDLE and start a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * new operation, so there is no need to check for new messages to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * start in here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static void start_clear_flags(struct ssif_info *ssif_info, unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) unsigned char msg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) ssif_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) ssif_info->ssif_state = SSIF_CLEARING_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) /* Make sure the watchdog pre-timeout flag is not set at startup. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) msg[2] = WDT_PRE_TIMEOUT_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (start_send(ssif_info, msg, 3) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /* Error, just go to normal state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) static void start_flag_fetch(struct ssif_info *ssif_info, unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) unsigned char mb[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) ssif_info->req_flags = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) ssif_info->ssif_state = SSIF_GETTING_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) mb[0] = (IPMI_NETFN_APP_REQUEST << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) mb[1] = IPMI_GET_MSG_FLAGS_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (start_send(ssif_info, mb, 2) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) static void check_start_send(struct ssif_info *ssif_info, unsigned long *flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) struct ipmi_smi_msg *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (start_send(ssif_info, msg->data, msg->data_size) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) unsigned long oflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) ssif_info->curr_msg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) ipmi_free_smi_msg(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) static void start_event_fetch(struct ssif_info *ssif_info, unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) struct ipmi_smi_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) ssif_info->req_events = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) msg = ipmi_alloc_smi_msg();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (!msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) ssif_info->curr_msg = msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) ssif_info->ssif_state = SSIF_GETTING_EVENTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) msg->data_size = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) check_start_send(ssif_info, flags, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static void start_recv_msg_fetch(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct ipmi_smi_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) msg = ipmi_alloc_smi_msg();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (!msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) ssif_info->curr_msg = msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) ssif_info->ssif_state = SSIF_GETTING_MESSAGES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) msg->data[1] = IPMI_GET_MSG_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) msg->data_size = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) check_start_send(ssif_info, flags, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * Must be called with the message lock held. This will release the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * message lock. Note that the caller will check SSIF_IDLE and start a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) * new operation, so there is no need to check for new messages to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * start in here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) static void handle_flags(struct ssif_info *ssif_info, unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (ssif_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) /* Watchdog pre-timeout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) ssif_inc_stat(ssif_info, watchdog_pretimeouts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) start_clear_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) ipmi_smi_watchdog_pretimeout(ssif_info->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) } else if (ssif_info->msg_flags & RECEIVE_MSG_AVAIL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) /* Messages available. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) start_recv_msg_fetch(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) else if (ssif_info->msg_flags & EVENT_MSG_BUFFER_FULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /* Events available. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) start_event_fetch(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) static int ipmi_ssif_thread(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct ssif_info *ssif_info = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) while (!kthread_should_stop()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) /* Wait for something to do */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) result = wait_for_completion_interruptible(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) &ssif_info->wake_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (ssif_info->stopping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (result == -ERESTARTSYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) init_completion(&ssif_info->wake_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (ssif_info->i2c_read_write == I2C_SMBUS_WRITE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) result = i2c_smbus_write_block_data(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ssif_info->client, ssif_info->i2c_command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) ssif_info->i2c_data[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) ssif_info->i2c_data + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) ssif_info->done_handler(ssif_info, result, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) result = i2c_smbus_read_block_data(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) ssif_info->client, ssif_info->i2c_command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ssif_info->i2c_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (result < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) ssif_info->done_handler(ssif_info, result,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) ssif_info->done_handler(ssif_info, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) ssif_info->i2c_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) static int ssif_i2c_send(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) ssif_i2c_done handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) int read_write, int command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) unsigned char *data, unsigned int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) ssif_info->done_handler = handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) ssif_info->i2c_read_write = read_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) ssif_info->i2c_command = command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) ssif_info->i2c_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) ssif_info->i2c_size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) complete(&ssif_info->wake_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) static void msg_done_handler(struct ssif_info *ssif_info, int result,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) unsigned char *data, unsigned int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) static void start_get(struct ssif_info *ssif_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) ssif_info->rtc_us_timer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) ssif_info->multi_pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) rv = ssif_i2c_send(ssif_info, msg_done_handler, I2C_SMBUS_READ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) SSIF_IPMI_RESPONSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) ssif_info->recv, I2C_SMBUS_BLOCK_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (rv < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) /* request failed, just return the error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) "Error from i2c_non_blocking_op(5)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) msg_done_handler(ssif_info, -EIO, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) static void retry_timeout(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) struct ssif_info *ssif_info = from_timer(ssif_info, t, retry_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) bool waiting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) if (ssif_info->stopping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) waiting = ssif_info->waiting_alert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) ssif_info->waiting_alert = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (waiting)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) start_get(ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) static void watch_timeout(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct ssif_info *ssif_info = from_timer(ssif_info, t, watch_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (ssif_info->stopping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (ssif_info->watch_timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) mod_timer(&ssif_info->watch_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) jiffies + ssif_info->watch_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) if (SSIF_IDLE(ssif_info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) start_flag_fetch(ssif_info, flags); /* Releases lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) ssif_info->req_flags = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) static void ssif_alert(struct i2c_client *client, enum i2c_alert_protocol type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) unsigned int data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) struct ssif_info *ssif_info = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) bool do_get = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (type != I2C_PROTOCOL_SMBUS_ALERT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) ssif_inc_stat(ssif_info, alerts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (ssif_info->waiting_alert) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) ssif_info->waiting_alert = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) del_timer(&ssif_info->retry_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) do_get = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) } else if (ssif_info->curr_msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) ssif_info->got_alert = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (do_get)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) start_get(ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) static int start_resend(struct ssif_info *ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) static void msg_done_handler(struct ssif_info *ssif_info, int result,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) unsigned char *data, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct ipmi_smi_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) * We are single-threaded here, so no need for a lock until we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) * start messing with driver states or the queues.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) if (result < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) ssif_info->retries_left--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (ssif_info->retries_left > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) ssif_inc_stat(ssif_info, receive_retries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) ssif_info->waiting_alert = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) ssif_info->rtc_us_timer = SSIF_MSG_USEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (!ssif_info->stopping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) mod_timer(&ssif_info->retry_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) jiffies + SSIF_MSG_JIFFIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) ssif_inc_stat(ssif_info, receive_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) "%s: Error %d\n", __func__, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) goto continue_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) if ((len > 1) && (ssif_info->multi_pos == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) && (data[0] == 0x00) && (data[1] == 0x01)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) /* Start of multi-part read. Start the next transaction. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) ssif_inc_stat(ssif_info, received_message_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) /* Remove the multi-part read marker. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) len -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) data += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) for (i = 0; i < len; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) ssif_info->data[i] = data[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) ssif_info->multi_len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) ssif_info->multi_pos = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) rv = ssif_i2c_send(ssif_info, msg_done_handler, I2C_SMBUS_READ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) SSIF_IPMI_MULTI_PART_RESPONSE_MIDDLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) ssif_info->recv, I2C_SMBUS_BLOCK_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (rv < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) "Error from i2c_non_blocking_op(1)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) result = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) } else if (ssif_info->multi_pos) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) /* Middle of multi-part read. Start the next transaction. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) unsigned char blocknum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) if (len == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) result = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) "Middle message with no data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) goto continue_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) blocknum = data[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) len--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) data++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (blocknum != 0xff && len != 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) /* All blocks but the last must have 31 data bytes. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) result = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) "Received middle message <31\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) goto continue_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) if (ssif_info->multi_len + len > IPMI_MAX_MSG_LENGTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) /* Received message too big, abort the operation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) result = -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) "Received message too big\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) goto continue_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) for (i = 0; i < len; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) ssif_info->data[i + ssif_info->multi_len] = data[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) ssif_info->multi_len += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (blocknum == 0xff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) /* End of read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) len = ssif_info->multi_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) data = ssif_info->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) } else if (blocknum + 1 != ssif_info->multi_pos) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * Out of sequence block, just abort. Block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * numbers start at zero for the second block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) * but multi_pos starts at one, so the +1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) "Received message out of sequence, expected %u, got %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) ssif_info->multi_pos - 1, blocknum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) result = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) ssif_inc_stat(ssif_info, received_message_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) ssif_info->multi_pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) rv = ssif_i2c_send(ssif_info, msg_done_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) I2C_SMBUS_READ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) SSIF_IPMI_MULTI_PART_RESPONSE_MIDDLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) ssif_info->recv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) I2C_SMBUS_BLOCK_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (rv < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) "Error from ssif_i2c_send\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) result = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) continue_op:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (result < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) ssif_inc_stat(ssif_info, receive_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) ssif_inc_stat(ssif_info, received_messages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) ssif_inc_stat(ssif_info, received_message_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (ssif_info->ssif_debug & SSIF_DEBUG_STATE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) "DONE 1: state = %d, result=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) ssif_info->ssif_state, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) msg = ssif_info->curr_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) if (msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) if (len > IPMI_MAX_MSG_LENGTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) len = IPMI_MAX_MSG_LENGTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) memcpy(msg->rsp, data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) msg->rsp_size = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) ssif_info->curr_msg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) switch (ssif_info->ssif_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) case SSIF_NORMAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (!msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) if (result < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) return_hosed_msg(ssif_info, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) deliver_recv_msg(ssif_info, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) case SSIF_GETTING_FLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) /* We got the flags from the SSIF, now handle them. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) if ((result < 0) || (len < 4) || (data[2] != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) * Error fetching flags, or invalid length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) * just give up for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) "Error getting flags: %d %d, %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) result, len, (len >= 3) ? data[2] : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) } else if (data[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) || data[1] != IPMI_GET_MSG_FLAGS_CMD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) * Don't abort here, maybe it was a queued
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) * response to a previous command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) "Invalid response getting flags: %x %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) data[0], data[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) ssif_inc_stat(ssif_info, flag_fetches);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) ssif_info->msg_flags = data[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) handle_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) case SSIF_CLEARING_FLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) /* We cleared the flags. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) if ((result < 0) || (len < 3) || (data[2] != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) /* Error clearing flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) "Error clearing flags: %d %d, %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) result, len, (len >= 3) ? data[2] : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) } else if (data[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) || data[1] != IPMI_CLEAR_MSG_FLAGS_CMD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) "Invalid response clearing flags: %x %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) data[0], data[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) case SSIF_GETTING_EVENTS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) if ((result < 0) || (len < 3) || (msg->rsp[2] != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) /* Error getting event, probably done. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) msg->done(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) /* Take off the event flag. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) ssif_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) handle_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) } else if (msg->rsp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) || msg->rsp[1] != IPMI_READ_EVENT_MSG_BUFFER_CMD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) "Invalid response getting events: %x %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) msg->rsp[0], msg->rsp[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) msg->done(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) /* Take off the event flag. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) ssif_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) handle_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) handle_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) ssif_inc_stat(ssif_info, events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) deliver_recv_msg(ssif_info, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) case SSIF_GETTING_MESSAGES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) if ((result < 0) || (len < 3) || (msg->rsp[2] != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) /* Error getting event, probably done. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) msg->done(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) /* Take off the msg flag. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) ssif_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) handle_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) } else if (msg->rsp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) || msg->rsp[1] != IPMI_GET_MSG_CMD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) "Invalid response clearing flags: %x %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) msg->rsp[0], msg->rsp[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) msg->done(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) /* Take off the msg flag. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) ssif_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) handle_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) ssif_inc_stat(ssif_info, incoming_messages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) handle_flags(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) deliver_recv_msg(ssif_info, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) if (SSIF_IDLE(ssif_info) && !ssif_info->stopping) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) if (ssif_info->req_events)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) start_event_fetch(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) else if (ssif_info->req_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) start_flag_fetch(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) start_next_msg(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) if (ssif_info->ssif_debug & SSIF_DEBUG_STATE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) "DONE 2: state = %d.\n", ssif_info->ssif_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) static void msg_written_handler(struct ssif_info *ssif_info, int result,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) unsigned char *data, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) /* We are single-threaded here, so no need for a lock. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) if (result < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) ssif_info->retries_left--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) if (ssif_info->retries_left > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (!start_resend(ssif_info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) ssif_inc_stat(ssif_info, send_retries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) /* request failed, just return the error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) ssif_inc_stat(ssif_info, send_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) "%s: Out of retries\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) msg_done_handler(ssif_info, -EIO, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) ssif_inc_stat(ssif_info, send_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) * Got an error on transmit, let the done routine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) * handle it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) "%s: Error %d\n", __func__, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) msg_done_handler(ssif_info, result, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) if (ssif_info->multi_data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) * In the middle of a multi-data write. See the comment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) * in the SSIF_MULTI_n_PART case in the probe function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) * for details on the intricacies of this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) int left, to_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) unsigned char *data_to_send;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) unsigned char cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) ssif_inc_stat(ssif_info, sent_messages_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) left = ssif_info->multi_len - ssif_info->multi_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) to_write = left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) if (to_write > 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) to_write = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) /* Length byte. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) ssif_info->multi_data[ssif_info->multi_pos] = to_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) data_to_send = ssif_info->multi_data + ssif_info->multi_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) ssif_info->multi_pos += to_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) cmd = SSIF_IPMI_MULTI_PART_REQUEST_MIDDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (ssif_info->cmd8_works) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if (left == to_write) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) cmd = SSIF_IPMI_MULTI_PART_REQUEST_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) ssif_info->multi_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) } else if (to_write < 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) ssif_info->multi_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) rv = ssif_i2c_send(ssif_info, msg_written_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) I2C_SMBUS_WRITE, cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) data_to_send, I2C_SMBUS_BLOCK_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) if (rv < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) /* request failed, just return the error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) ssif_inc_stat(ssif_info, send_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) "Error from i2c_non_blocking_op(3)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) msg_done_handler(ssif_info, -EIO, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) /* Ready to request the result. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) ssif_inc_stat(ssif_info, sent_messages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) ssif_inc_stat(ssif_info, sent_messages_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (ssif_info->got_alert) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) /* The result is already ready, just start it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) ssif_info->got_alert = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) start_get(ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) /* Wait a jiffie then request the next message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) ssif_info->waiting_alert = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) ssif_info->retries_left = SSIF_RECV_RETRIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) ssif_info->rtc_us_timer = SSIF_MSG_PART_USEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) if (!ssif_info->stopping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) mod_timer(&ssif_info->retry_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) jiffies + SSIF_MSG_PART_JIFFIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) static int start_resend(struct ssif_info *ssif_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) int command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) ssif_info->got_alert = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) if (ssif_info->data_len > 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) command = SSIF_IPMI_MULTI_PART_REQUEST_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) ssif_info->multi_data = ssif_info->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) ssif_info->multi_len = ssif_info->data_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) * Subtle thing, this is 32, not 33, because we will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) * overwrite the thing at position 32 (which was just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) * transmitted) with the new length.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) ssif_info->multi_pos = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) ssif_info->data[0] = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) ssif_info->multi_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) command = SSIF_IPMI_REQUEST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) ssif_info->data[0] = ssif_info->data_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) rv = ssif_i2c_send(ssif_info, msg_written_handler, I2C_SMBUS_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) command, ssif_info->data, I2C_SMBUS_BLOCK_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) if (rv && (ssif_info->ssif_debug & SSIF_DEBUG_MSG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) "Error from i2c_non_blocking_op(4)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) static int start_send(struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) unsigned char *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) if (len > IPMI_MAX_MSG_LENGTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) return -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) if (len > ssif_info->max_xmit_msg_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) return -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) ssif_info->retries_left = SSIF_SEND_RETRIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) memcpy(ssif_info->data + 1, data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) ssif_info->data_len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) return start_resend(ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) /* Must be called with the message lock held. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) static void start_next_msg(struct ssif_info *ssif_info, unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) struct ipmi_smi_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) unsigned long oflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) if (!SSIF_IDLE(ssif_info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) if (!ssif_info->waiting_msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) ssif_info->curr_msg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) ssif_info->curr_msg = ssif_info->waiting_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) ssif_info->waiting_msg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) rv = start_send(ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) ssif_info->curr_msg->data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) ssif_info->curr_msg->data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) if (rv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) msg = ssif_info->curr_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) ssif_info->curr_msg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) return_hosed_msg(ssif_info, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) goto restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) static void sender(void *send_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) struct ipmi_smi_msg *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) struct ssif_info *ssif_info = (struct ssif_info *) send_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) BUG_ON(ssif_info->waiting_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) ssif_info->waiting_msg = msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) start_next_msg(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) if (ssif_info->ssif_debug & SSIF_DEBUG_TIMING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) struct timespec64 t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) ktime_get_real_ts64(&t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) "**Enqueue %02x %02x: %lld.%6.6ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) msg->data[0], msg->data[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) (long long)t.tv_sec, (long)t.tv_nsec / NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) struct ssif_info *ssif_info = send_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) data->addr_src = ssif_info->addr_source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) data->dev = &ssif_info->client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) data->addr_info = ssif_info->addr_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) get_device(data->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) * Upper layer wants us to request events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) static void request_events(void *send_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) struct ssif_info *ssif_info = (struct ssif_info *) send_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) if (!ssif_info->has_event_buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) ssif_info->req_events = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) * Upper layer is changing the flag saying whether we need to request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) * flags periodically or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) static void ssif_set_need_watch(void *send_info, unsigned int watch_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) struct ssif_info *ssif_info = (struct ssif_info *) send_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) unsigned long oflags, *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) long timeout = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) if (watch_mask & IPMI_WATCH_MASK_CHECK_MESSAGES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) timeout = SSIF_WATCH_MSG_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) else if (watch_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) timeout = SSIF_WATCH_WATCHDOG_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) if (timeout != ssif_info->watch_timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) ssif_info->watch_timeout = timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) if (ssif_info->watch_timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) mod_timer(&ssif_info->watch_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) jiffies + ssif_info->watch_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) ipmi_ssif_unlock_cond(ssif_info, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) static int ssif_start_processing(void *send_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) struct ipmi_smi *intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) struct ssif_info *ssif_info = send_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) ssif_info->intf = intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) #define MAX_SSIF_BMCS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) static unsigned short addr[MAX_SSIF_BMCS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) static int num_addrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) module_param_array(addr, ushort, &num_addrs, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) MODULE_PARM_DESC(addr, "The addresses to scan for IPMI BMCs on the SSIFs.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) static char *adapter_name[MAX_SSIF_BMCS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) static int num_adapter_names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) module_param_array(adapter_name, charp, &num_adapter_names, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) MODULE_PARM_DESC(adapter_name, "The string name of the I2C device that has the BMC. By default all devices are scanned.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) static int slave_addrs[MAX_SSIF_BMCS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) static int num_slave_addrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) module_param_array(slave_addrs, int, &num_slave_addrs, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) MODULE_PARM_DESC(slave_addrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) "The default IPMB slave address for the controller.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) static bool alerts_broken;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) module_param(alerts_broken, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) MODULE_PARM_DESC(alerts_broken, "Don't enable alerts for the controller.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) * Bit 0 enables message debugging, bit 1 enables state debugging, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) * bit 2 enables timing debugging. This is an array indexed by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) * interface number"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) static int dbg[MAX_SSIF_BMCS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) static int num_dbg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) module_param_array(dbg, int, &num_dbg, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) MODULE_PARM_DESC(dbg, "Turn on debugging.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) static bool ssif_dbg_probe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) module_param_named(dbg_probe, ssif_dbg_probe, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) MODULE_PARM_DESC(dbg_probe, "Enable debugging of probing of adapters.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) static bool ssif_tryacpi = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) module_param_named(tryacpi, ssif_tryacpi, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the default scan of the interfaces identified via ACPI");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) static bool ssif_trydmi = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) module_param_named(trydmi, ssif_trydmi, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the default scan of the interfaces identified via DMI (SMBIOS)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) static DEFINE_MUTEX(ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) static LIST_HEAD(ssif_infos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) #define IPMI_SSIF_ATTR(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) static ssize_t ipmi_##name##_show(struct device *dev, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) struct device_attribute *attr, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) struct ssif_info *ssif_info = dev_get_drvdata(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) return snprintf(buf, 10, "%u\n", ssif_get_stat(ssif_info, name));\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) static DEVICE_ATTR(name, S_IRUGO, ipmi_##name##_show, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) static ssize_t ipmi_type_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) return snprintf(buf, 10, "ssif\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) static DEVICE_ATTR(type, S_IRUGO, ipmi_type_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) IPMI_SSIF_ATTR(sent_messages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) IPMI_SSIF_ATTR(sent_messages_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) IPMI_SSIF_ATTR(send_retries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) IPMI_SSIF_ATTR(send_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) IPMI_SSIF_ATTR(received_messages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) IPMI_SSIF_ATTR(received_message_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) IPMI_SSIF_ATTR(receive_retries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) IPMI_SSIF_ATTR(receive_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) IPMI_SSIF_ATTR(flag_fetches);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) IPMI_SSIF_ATTR(hosed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) IPMI_SSIF_ATTR(events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) IPMI_SSIF_ATTR(watchdog_pretimeouts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) IPMI_SSIF_ATTR(alerts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) static struct attribute *ipmi_ssif_dev_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) &dev_attr_type.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) &dev_attr_sent_messages.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) &dev_attr_sent_messages_parts.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) &dev_attr_send_retries.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) &dev_attr_send_errors.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) &dev_attr_received_messages.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) &dev_attr_received_message_parts.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) &dev_attr_receive_retries.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) &dev_attr_receive_errors.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) &dev_attr_flag_fetches.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) &dev_attr_hosed.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) &dev_attr_events.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) &dev_attr_watchdog_pretimeouts.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) &dev_attr_alerts.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) static const struct attribute_group ipmi_ssif_dev_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) .attrs = ipmi_ssif_dev_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) static void shutdown_ssif(void *send_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) struct ssif_info *ssif_info = send_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) device_remove_group(&ssif_info->client->dev, &ipmi_ssif_dev_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) dev_set_drvdata(&ssif_info->client->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) /* make sure the driver is not looking for flags any more. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) while (ssif_info->ssif_state != SSIF_NORMAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) schedule_timeout(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) ssif_info->stopping = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) del_timer_sync(&ssif_info->watch_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) del_timer_sync(&ssif_info->retry_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) if (ssif_info->thread) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) complete(&ssif_info->wake_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) kthread_stop(ssif_info->thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) static int ssif_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) struct ssif_info *ssif_info = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) struct ssif_addr_info *addr_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) if (!ssif_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) * After this point, we won't deliver anything asychronously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) * to the message handler. We can unregister ourself.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) ipmi_unregister_smi(ssif_info->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) list_for_each_entry(addr_info, &ssif_infos, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) if (addr_info->client == client) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) addr_info->client = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) kfree(ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) static int read_response(struct i2c_client *client, unsigned char *resp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) int ret = -ENODEV, retry_cnt = SSIF_RECV_RETRIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) while (retry_cnt > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) ret = i2c_smbus_read_block_data(client, SSIF_IPMI_RESPONSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) if (ret > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) msleep(SSIF_MSG_MSEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) retry_cnt--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) if (retry_cnt <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) static int do_cmd(struct i2c_client *client, int len, unsigned char *msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) int *resp_len, unsigned char *resp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) int retry_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) retry_cnt = SSIF_SEND_RETRIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) retry1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) ret = i2c_smbus_write_block_data(client, SSIF_IPMI_REQUEST, len, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) retry_cnt--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) if (retry_cnt > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) goto retry1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) ret = read_response(client, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) if (ret > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) /* Validate that the response is correct. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) if (ret < 3 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) (resp[0] != (msg[0] | (1 << 2))) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) (resp[1] != msg[1]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) else if (ret > IPMI_MAX_MSG_LENGTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) ret = -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) *resp_len = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) static int ssif_detect(struct i2c_client *client, struct i2c_board_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) unsigned char *resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) unsigned char msg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) if (!resp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) /* Do a Get Device ID command, since it is required. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) msg[0] = IPMI_NETFN_APP_REQUEST << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) msg[1] = IPMI_GET_DEVICE_ID_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) rv = do_cmd(client, 2, msg, &len, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) rv = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) strlcpy(info->type, DEVICE_NAME, I2C_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) kfree(resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) static int strcmp_nospace(char *s1, char *s2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) while (*s1 && *s2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) while (isspace(*s1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) s1++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) while (isspace(*s2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) s2++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) if (*s1 > *s2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) if (*s1 < *s2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) s1++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) s2++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) static struct ssif_addr_info *ssif_info_find(unsigned short addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) char *adapter_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) bool match_null_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) struct ssif_addr_info *info, *found = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) list_for_each_entry(info, &ssif_infos, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) if (info->binfo.addr == addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) if (info->addr_src == SI_SMBIOS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) info->adapter_name = kstrdup(adapter_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) if (info->adapter_name || adapter_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) if (!info->adapter_name != !adapter_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) /* One is NULL and one is not */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) if (adapter_name &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) strcmp_nospace(info->adapter_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) adapter_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) /* Names do not match */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) found = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) if (!found && match_null_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) /* Try to get an exact match first, then try with a NULL name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) adapter_name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) match_null_name = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) goto restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) return found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) static bool check_acpi(struct ssif_info *ssif_info, struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) acpi_handle acpi_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) acpi_handle = ACPI_HANDLE(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) if (acpi_handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) ssif_info->addr_source = SI_ACPI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) ssif_info->addr_info.acpi_info.acpi_handle = acpi_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) request_module("acpi_ipmi");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) static int find_slave_address(struct i2c_client *client, int slave_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) #ifdef CONFIG_IPMI_DMI_DECODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) if (!slave_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) slave_addr = ipmi_dmi_get_slave_addr(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) SI_TYPE_INVALID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) i2c_adapter_id(client->adapter),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) client->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) return slave_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) static int start_multipart_test(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) unsigned char *msg, bool do_middle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) int retry_cnt = SSIF_SEND_RETRIES, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) retry_write:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) ret = i2c_smbus_write_block_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) SSIF_IPMI_MULTI_PART_REQUEST_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) 32, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) retry_cnt--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) if (retry_cnt > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) goto retry_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) dev_err(&client->dev, "Could not write multi-part start, though the BMC said it could handle it. Just limit sends to one part.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) if (!do_middle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) ret = i2c_smbus_write_block_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) SSIF_IPMI_MULTI_PART_REQUEST_MIDDLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) 32, msg + 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) dev_err(&client->dev, "Could not write multi-part middle, though the BMC said it could handle it. Just limit sends to one part.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) static void test_multipart_messages(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) struct ssif_info *ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) unsigned char *resp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) unsigned char msg[65];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) bool do_middle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) if (ssif_info->max_xmit_msg_size <= 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) do_middle = ssif_info->max_xmit_msg_size > 63;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) memset(msg, 0, sizeof(msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) msg[0] = IPMI_NETFN_APP_REQUEST << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) msg[1] = IPMI_GET_DEVICE_ID_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) * The specification is all messed up dealing with sending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) * multi-part messages. Per what the specification says, it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) * is impossible to send a message that is a multiple of 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) * bytes, except for 32 itself. It talks about a "start"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) * transaction (cmd=6) that must be 32 bytes, "middle"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) * transaction (cmd=7) that must be 32 bytes, and an "end"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) * transaction. The "end" transaction is shown as cmd=7 in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) * the text, but if that's the case there is no way to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) * differentiate between a middle and end part except the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) * length being less than 32. But there is a table at the far
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) * end of the section (that I had never noticed until someone
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) * pointed it out to me) that mentions it as cmd=8.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) * After some thought, I think the example is wrong and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) * end transaction should be cmd=8. But some systems don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) * implement cmd=8, they use a zero-length end transaction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) * even though that violates the SMBus specification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) * So, to work around this, this code tests if cmd=8 works.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) * If it does, then we use that. If not, it tests zero-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) * byte end transactions. If that works, good. If not,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) * we only allow 63-byte transactions max.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) ret = start_multipart_test(client, msg, do_middle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) goto out_no_multi_part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) ret = i2c_smbus_write_block_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) SSIF_IPMI_MULTI_PART_REQUEST_END,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) 1, msg + 64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) ret = read_response(client, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) if (ret > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) /* End transactions work, we are good. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) ssif_info->cmd8_works = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) ret = start_multipart_test(client, msg, do_middle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) dev_err(&client->dev, "Second multipart test failed.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) goto out_no_multi_part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) ret = i2c_smbus_write_block_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) SSIF_IPMI_MULTI_PART_REQUEST_MIDDLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) 0, msg + 64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) ret = read_response(client, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) if (ret > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) /* Zero-size end parts work, use those. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) /* Limit to 63 bytes and use a short middle command to mark the end. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) if (ssif_info->max_xmit_msg_size > 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) ssif_info->max_xmit_msg_size = 63;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) out_no_multi_part:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) ssif_info->max_xmit_msg_size = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) * Global enables we care about.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) #define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) IPMI_BMC_EVT_MSG_INTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) static void ssif_remove_dup(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) struct ssif_info *ssif_info = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) ipmi_unregister_smi(ssif_info->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) kfree(ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) static int ssif_add_infos(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) struct ssif_addr_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) info = kzalloc(sizeof(*info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) info->addr_src = SI_ACPI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) info->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) info->adapter_name = kstrdup(client->adapter->name, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) info->binfo.addr = client->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) list_add_tail(&info->link, &ssif_infos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) * Prefer ACPI over SMBIOS, if both are available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) * So if we get an ACPI interface and have already registered a SMBIOS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) * interface at the same address, remove the SMBIOS and add the ACPI one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) static int ssif_check_and_remove(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) struct ssif_info *ssif_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) struct ssif_addr_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) list_for_each_entry(info, &ssif_infos, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) if (!info->client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) if (!strcmp(info->adapter_name, client->adapter->name) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) info->binfo.addr == client->addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) if (info->addr_src == SI_ACPI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) if (ssif_info->addr_source == SI_ACPI &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) info->addr_src == SI_SMBIOS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) dev_info(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) "Removing %s-specified SSIF interface in favor of ACPI\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) ipmi_addr_src_to_str(info->addr_src));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) ssif_remove_dup(info->client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) unsigned char msg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) unsigned char *resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) struct ssif_info *ssif_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) int rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) u8 slave_addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) struct ssif_addr_info *addr_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) mutex_lock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) if (!resp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) mutex_unlock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) ssif_info = kzalloc(sizeof(*ssif_info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) if (!ssif_info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) kfree(resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) mutex_unlock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) if (!check_acpi(ssif_info, &client->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) addr_info = ssif_info_find(client->addr, client->adapter->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) if (!addr_info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) /* Must have come in through sysfs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) ssif_info->addr_source = SI_HOTMOD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) ssif_info->addr_source = addr_info->addr_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) ssif_info->ssif_debug = addr_info->debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) ssif_info->addr_info = addr_info->addr_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) addr_info->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) slave_addr = addr_info->slave_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) ssif_info->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) i2c_set_clientdata(client, ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) rv = ssif_check_and_remove(client, ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) /* If rv is 0 and addr source is not SI_ACPI, continue probing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) if (!rv && ssif_info->addr_source == SI_ACPI) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) rv = ssif_add_infos(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) if (rv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) dev_err(&client->dev, "Out of memory!, exiting ..\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) } else if (rv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) dev_err(&client->dev, "Not probing, Interface already present\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) slave_addr = find_slave_address(client, slave_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) dev_info(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) "Trying %s-specified SSIF interface at i2c address 0x%x, adapter %s, slave address 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) ipmi_addr_src_to_str(ssif_info->addr_source),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) client->addr, client->adapter->name, slave_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) /* Now check for system interface capabilities */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) msg[0] = IPMI_NETFN_APP_REQUEST << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) msg[1] = IPMI_GET_SYSTEM_INTERFACE_CAPABILITIES_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) msg[2] = 0; /* SSIF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) rv = do_cmd(client, 3, msg, &len, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) if (!rv && (len >= 3) && (resp[2] == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) if (len < 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) if (ssif_dbg_probe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) "SSIF info too short: %d\n", len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) goto no_support;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) /* Got a good SSIF response, handle it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) ssif_info->max_xmit_msg_size = resp[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) ssif_info->max_recv_msg_size = resp[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) ssif_info->multi_support = (resp[4] >> 6) & 0x3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) ssif_info->supports_pec = (resp[4] >> 3) & 0x1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) /* Sanitize the data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) switch (ssif_info->multi_support) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) case SSIF_NO_MULTI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) if (ssif_info->max_xmit_msg_size > 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) ssif_info->max_xmit_msg_size = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) if (ssif_info->max_recv_msg_size > 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) ssif_info->max_recv_msg_size = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) case SSIF_MULTI_2_PART:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) if (ssif_info->max_xmit_msg_size > 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) ssif_info->max_xmit_msg_size = 63;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) if (ssif_info->max_recv_msg_size > 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) ssif_info->max_recv_msg_size = 62;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) case SSIF_MULTI_n_PART:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) /* We take whatever size given, but do some testing. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) /* Data is not sane, just give up. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) goto no_support;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) no_support:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) /* Assume no multi-part or PEC support */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) dev_info(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) "Error fetching SSIF: %d %d %2.2x, your system probably doesn't support this command so using defaults\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) rv, len, resp[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) ssif_info->max_xmit_msg_size = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) ssif_info->max_recv_msg_size = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) ssif_info->multi_support = SSIF_NO_MULTI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) ssif_info->supports_pec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) test_multipart_messages(client, ssif_info, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) /* Make sure the NMI timeout is cleared. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) msg[0] = IPMI_NETFN_APP_REQUEST << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) msg[2] = WDT_PRE_TIMEOUT_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) rv = do_cmd(client, 3, msg, &len, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) if (rv || (len < 3) || (resp[2] != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) "Unable to clear message flags: %d %d %2.2x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) rv, len, resp[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) /* Attempt to enable the event buffer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) msg[0] = IPMI_NETFN_APP_REQUEST << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) rv = do_cmd(client, 2, msg, &len, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) if (rv || (len < 4) || (resp[2] != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) "Error getting global enables: %d %d %2.2x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) rv, len, resp[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) rv = 0; /* Not fatal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) ssif_info->global_enables = resp[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) ssif_info->has_event_buffer = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) /* buffer is already enabled, nothing to do. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) msg[0] = IPMI_NETFN_APP_REQUEST << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) msg[2] = ssif_info->global_enables | IPMI_BMC_EVT_MSG_BUFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) rv = do_cmd(client, 3, msg, &len, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) if (rv || (len < 2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) "Error setting global enables: %d %d %2.2x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) rv, len, resp[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) rv = 0; /* Not fatal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) if (resp[2] == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) /* A successful return means the event buffer is supported. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) ssif_info->has_event_buffer = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) ssif_info->global_enables |= IPMI_BMC_EVT_MSG_BUFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) /* Some systems don't behave well if you enable alerts. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) if (alerts_broken)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) msg[0] = IPMI_NETFN_APP_REQUEST << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) msg[2] = ssif_info->global_enables | IPMI_BMC_RCV_MSG_INTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) rv = do_cmd(client, 3, msg, &len, resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) if (rv || (len < 2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) dev_warn(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) "Error setting global enables: %d %d %2.2x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) rv, len, resp[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) rv = 0; /* Not fatal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) if (resp[2] == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) /* A successful return means the alert is supported. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) ssif_info->supports_alert = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) ssif_info->global_enables |= IPMI_BMC_RCV_MSG_INTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) if (ssif_dbg_probe) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) dev_dbg(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) "%s: i2c_probe found device at i2c address %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) __func__, client->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) spin_lock_init(&ssif_info->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) ssif_info->ssif_state = SSIF_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) timer_setup(&ssif_info->retry_timer, retry_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) timer_setup(&ssif_info->watch_timer, watch_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) for (i = 0; i < SSIF_NUM_STATS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) atomic_set(&ssif_info->stats[i], 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) if (ssif_info->supports_pec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) ssif_info->client->flags |= I2C_CLIENT_PEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) ssif_info->handlers.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) ssif_info->handlers.start_processing = ssif_start_processing;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) ssif_info->handlers.shutdown = shutdown_ssif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) ssif_info->handlers.get_smi_info = get_smi_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) ssif_info->handlers.sender = sender;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) ssif_info->handlers.request_events = request_events;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) ssif_info->handlers.set_need_watch = ssif_set_need_watch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) unsigned int thread_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) thread_num = ((i2c_adapter_id(ssif_info->client->adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) << 8) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) ssif_info->client->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) init_completion(&ssif_info->wake_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) ssif_info->thread = kthread_run(ipmi_ssif_thread, ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) "kssif%4.4x", thread_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) if (IS_ERR(ssif_info->thread)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) rv = PTR_ERR(ssif_info->thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) dev_notice(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) "Could not start kernel thread: error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) rv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) dev_set_drvdata(&ssif_info->client->dev, ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) rv = device_add_group(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) &ipmi_ssif_dev_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) if (rv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) dev_err(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) "Unable to add device attributes: error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) rv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) rv = ipmi_register_smi(&ssif_info->handlers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) ssif_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) &ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) slave_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) if (rv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) dev_err(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) "Unable to register device: error %d\n", rv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) goto out_remove_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) if (rv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) if (addr_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) addr_info->client = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) dev_err(&ssif_info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) "Unable to start IPMI SSIF: %d\n", rv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) i2c_set_clientdata(client, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) kfree(ssif_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) kfree(resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) mutex_unlock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) out_remove_attr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) device_remove_group(&ssif_info->client->dev, &ipmi_ssif_dev_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) dev_set_drvdata(&ssif_info->client->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) static int new_ssif_client(int addr, char *adapter_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) int debug, int slave_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) enum ipmi_addr_src addr_src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) struct ssif_addr_info *addr_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) int rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) mutex_lock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) if (ssif_info_find(addr, adapter_name, false)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) rv = -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) addr_info = kzalloc(sizeof(*addr_info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) if (!addr_info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) rv = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) if (adapter_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) addr_info->adapter_name = kstrdup(adapter_name, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) if (!addr_info->adapter_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) kfree(addr_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) rv = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) strncpy(addr_info->binfo.type, DEVICE_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) sizeof(addr_info->binfo.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) addr_info->binfo.addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) addr_info->binfo.platform_data = addr_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) addr_info->debug = debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) addr_info->slave_addr = slave_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) addr_info->addr_src = addr_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) addr_info->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) if (dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) dev_set_drvdata(dev, addr_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) list_add_tail(&addr_info->link, &ssif_infos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) /* Address list will get it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) mutex_unlock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) static void free_ssif_clients(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) struct ssif_addr_info *info, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) mutex_lock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) list_for_each_entry_safe(info, tmp, &ssif_infos, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) list_del(&info->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) kfree(info->adapter_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) mutex_unlock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) static unsigned short *ssif_address_list(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) struct ssif_addr_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) unsigned int count = 0, i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) unsigned short *address_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) list_for_each_entry(info, &ssif_infos, link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) address_list = kcalloc(count + 1, sizeof(*address_list),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) if (!address_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) list_for_each_entry(info, &ssif_infos, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) unsigned short addr = info->binfo.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) int j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) for (j = 0; j < i; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) if (address_list[j] == addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) /* Found a dup. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) if (j == i) /* Didn't find it in the list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) address_list[i++] = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) address_list[i] = I2C_CLIENT_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) return address_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) static const struct acpi_device_id ssif_acpi_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) { "IPI0001", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) MODULE_DEVICE_TABLE(acpi, ssif_acpi_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) #ifdef CONFIG_DMI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) static int dmi_ipmi_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) u8 slave_addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) u16 i2c_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) if (!ssif_trydmi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) rv = device_property_read_u16(&pdev->dev, "i2c-addr", &i2c_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) if (rv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) dev_warn(&pdev->dev, "No i2c-addr property\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) slave_addr = 0x20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) return new_ssif_client(i2c_addr, NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) slave_addr, SI_SMBIOS, &pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) static int dmi_ipmi_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) static const struct i2c_device_id ssif_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) { DEVICE_NAME, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) MODULE_DEVICE_TABLE(i2c, ssif_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) static struct i2c_driver ssif_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) .class = I2C_CLASS_HWMON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) .name = DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) .probe = ssif_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) .remove = ssif_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) .alert = ssif_alert,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) .id_table = ssif_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) .detect = ssif_detect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) static int ssif_platform_probe(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) return dmi_ipmi_probe(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) static int ssif_platform_remove(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) struct ssif_addr_info *addr_info = dev_get_drvdata(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) if (!addr_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) mutex_lock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) list_del(&addr_info->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) kfree(addr_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) mutex_unlock(&ssif_infos_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) static const struct platform_device_id ssif_plat_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) { "dmi-ipmi-ssif", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) static struct platform_driver ipmi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) .name = DEVICE_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) .probe = ssif_platform_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) .remove = ssif_platform_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) .id_table = ssif_plat_ids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) static int init_ipmi_ssif(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) if (initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) pr_info("IPMI SSIF Interface driver\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) /* build list for i2c from addr list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) for (i = 0; i < num_addrs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) rv = new_ssif_client(addr[i], adapter_name[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) dbg[i], slave_addrs[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) SI_HARDCODED, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) pr_err("Couldn't add hardcoded device at addr 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) addr[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) if (ssif_tryacpi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) ssif_i2c_driver.driver.acpi_match_table =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) ACPI_PTR(ssif_acpi_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) if (ssif_trydmi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) rv = platform_driver_register(&ipmi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) pr_err("Unable to register driver: %d\n", rv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) platform_registered = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) ssif_i2c_driver.address_list = ssif_address_list();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) rv = i2c_add_driver(&ssif_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) if (!rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) initialized = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) module_init(init_ipmi_ssif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) static void cleanup_ipmi_ssif(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) if (!initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) initialized = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) i2c_del_driver(&ssif_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) kfree(ssif_i2c_driver.address_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) if (ssif_trydmi && platform_registered)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) platform_driver_unregister(&ipmi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) free_ssif_clients();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) module_exit(cleanup_ipmi_ssif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) MODULE_ALIAS("platform:dmi-ipmi-ssif");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) MODULE_AUTHOR("Todd C Davis <todd.c.davis@intel.com>, Corey Minyard <minyard@acm.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) MODULE_DESCRIPTION("IPMI driver for management controllers on a SMBus");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags