This allows userspace to receive messages that a BMC (such as the HP iLO 2) transmits using an OEM medium. Based on code originally written by Patrick Schoeller.
Signed-off-by: dann frazier <[email protected]> --- drivers/char/ipmi/ipmi_msghandler.c | 130 +++++++++++++++++++++++++++++++++-- include/linux/ipmi.h | 2 + 2 files changed, 127 insertions(+), 5 deletions(-) diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index 7a88dfd..64e29e4 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -3267,6 +3267,107 @@ static int handle_lan_get_msg_cmd(ipmi_smi_t intf, return rv; } +/* +** This routine will handle "Get Message" command responses with +** channels that use an OEM Medium. We will queue these messages +** until an application comes and retrieves them. The message format +** belongs to the OEM. See IPMI 2.0 specification, Chapter 6 and +** Chapter 22, sections 22.6 and 22.24 for more details. +*/ +static int handle_oem_get_msg_cmd(ipmi_smi_t intf, + struct ipmi_smi_msg *msg) +{ + struct cmd_rcvr *rcvr; + int rv = 0; + unsigned char netfn; + unsigned char cmd; + unsigned char chan; + ipmi_user_t user = NULL; + struct ipmi_system_interface_addr *smi_addr; + struct ipmi_recv_msg *recv_msg; + + /* We expect the OEM SW to perform error checking + so we just do some basic sanity checks */ + if (msg->rsp_size < 4) { + /* Message not big enough, just ignore it. */ + ipmi_inc_stat(intf, invalid_commands); + return 0; + } + + if (msg->rsp[2] != 0) { + /* An error getting the response, just ignore it. */ + return 0; + } + + /* This is an OEM Message so the OEM needs to know how + handle the message. We do no interpretation. */ + netfn = msg->rsp[0] >> 2; + cmd = msg->rsp[1]; + chan = msg->rsp[3] & 0xf; + + rcu_read_lock(); + rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); + if (rcvr) { + user = rcvr->user; + kref_get(&user->refcount); + } else + user = NULL; + rcu_read_unlock(); + + if (user == NULL) { + /* We didn't find a user, just give up. */ + ipmi_inc_stat(intf, unhandled_commands); + + /* + * Don't do anything with these messages, just allow + * them to be freed. + */ + + rv = 0; + } else { + /* Deliver the message to the user. */ + ipmi_inc_stat(intf, handled_commands); + + recv_msg = ipmi_alloc_recv_msg(); + if (! recv_msg) { + /* We couldn't allocate memory for the + message, so requeue it for handling + later. */ + rv = 1; + kref_put(&user->refcount, free_user); + } else { + /* OEM Messages are expected to be delivered via + the system interface to SMS software. We might + need to visit this again depending on OEM + requirements */ + smi_addr = ((struct ipmi_system_interface_addr *) + &(recv_msg->addr)); + smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; + smi_addr->channel = IPMI_BMC_CHANNEL; + smi_addr->lun = msg->rsp[0] & 3; + + recv_msg->user = user; + recv_msg->user_msg_data = NULL; + recv_msg->recv_type = IPMI_OEM_RECV_TYPE; + recv_msg->msg.netfn = msg->rsp[0] >> 2; + recv_msg->msg.cmd = msg->rsp[1]; + recv_msg->msg.data = recv_msg->msg_data; + + /* + * The message starts at byte 4 which follows the + * the Channel Byte in the "GET MESSAGE" command + */ + recv_msg->msg.data_len = msg->rsp_size - 4; + memcpy(recv_msg->msg_data, + &(msg->rsp[4]), + msg->rsp_size - 4); + deliver_response(recv_msg); + } + } + + return rv; +} + static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, struct ipmi_smi_msg *msg) { @@ -3522,6 +3623,17 @@ static int handle_new_recv_msg(ipmi_smi_t intf, goto out; } + /* + ** We need to make sure the channels have been initialized. + ** The channel_handler routine will set the "curr_channel" + ** equal to or greater than IPMI_MAX_CHANNELS when all the + ** channels for this interface have been initialized. + */ + if (intf->curr_channel < IPMI_MAX_CHANNELS) { + requeue = 1; /* Just put the message back for now */ + goto out; + } + switch (intf->channels[chan].medium) { case IPMI_CHANNEL_MEDIUM_IPMB: if (msg->rsp[4] & 0x04) { @@ -3557,11 +3669,19 @@ static int handle_new_recv_msg(ipmi_smi_t intf, break; default: - /* - * We don't handle the channel type, so just - * free the message. - */ - requeue = 0; + /* Check for OEM Channels. Clients had better + register for these commands. */ + if ( (intf->channels[chan].medium >= 0x60) && + (intf->channels[chan].medium <= 0x7F) ) { + requeue = handle_oem_get_msg_cmd(intf, msg); + } + else { + /* + * We don't handle the channel type, so just + * free the message. + */ + requeue = 0; + } } } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) diff --git a/include/linux/ipmi.h b/include/linux/ipmi.h index 7ebdb4f..65aae34 100644 --- a/include/linux/ipmi.h +++ b/include/linux/ipmi.h @@ -198,6 +198,8 @@ struct kernel_ipmi_msg { response. When you send a response message, this will be returned. */ +#define IPMI_OEM_RECV_TYPE 5 /* The response for OEM Channels */ + /* Note that async events and received commands do not have a completion code as the first byte of the incoming data, unlike a response. */ -- 1.5.6.5 ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Openipmi-developer mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/openipmi-developer
