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5ca2d3882d
To support dynamic addition/remove of clients it is more convenient to use list instead of static array Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
846 lines
21 KiB
C
846 lines
21 KiB
C
/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2003-2012, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <linux/export.h>
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#include <linux/pci.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/mei.h>
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#include <linux/pm_runtime.h>
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#include "mei_dev.h"
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#include "hbm.h"
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#include "client.h"
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static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
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{
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#define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status
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switch (status) {
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MEI_CL_CS(SUCCESS);
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MEI_CL_CS(NOT_FOUND);
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MEI_CL_CS(ALREADY_STARTED);
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MEI_CL_CS(OUT_OF_RESOURCES);
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MEI_CL_CS(MESSAGE_SMALL);
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default: return "unknown";
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}
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#undef MEI_CL_CCS
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}
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/**
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* mei_cl_conn_status_to_errno - convert client connect response
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* status to error code
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*
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* @status: client connect response status
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*
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* returns corresponding error code
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*/
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static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status)
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{
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switch (status) {
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case MEI_CL_CONN_SUCCESS: return 0;
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case MEI_CL_CONN_NOT_FOUND: return -ENOTTY;
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case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY;
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case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY;
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case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL;
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default: return -EINVAL;
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}
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}
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/**
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* mei_hbm_idle - set hbm to idle state
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*
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* @dev: the device structure
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*/
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void mei_hbm_idle(struct mei_device *dev)
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{
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dev->init_clients_timer = 0;
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dev->hbm_state = MEI_HBM_IDLE;
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}
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/**
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* mei_hbm_reset - reset hbm counters and book keeping data structurs
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*
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* @dev: the device structure
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*/
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void mei_hbm_reset(struct mei_device *dev)
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{
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struct mei_me_client *me_cl, *next;
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dev->me_client_presentation_num = 0;
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dev->me_client_index = 0;
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list_for_each_entry_safe(me_cl, next, &dev->me_clients, list) {
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list_del(&me_cl->list);
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kfree(me_cl);
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}
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mei_hbm_idle(dev);
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}
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/**
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* mei_hbm_cl_hdr - construct client hbm header
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*
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* @cl: client
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* @hbm_cmd: host bus message command
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* @buf: buffer for cl header
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* @len: buffer length
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*/
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static inline
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void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
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{
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struct mei_hbm_cl_cmd *cmd = buf;
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memset(cmd, 0, len);
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cmd->hbm_cmd = hbm_cmd;
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cmd->host_addr = cl->host_client_id;
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cmd->me_addr = cl->me_client_id;
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}
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/**
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* mei_hbm_cl_write - write simple hbm client message
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*
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* @dev: the device structure
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* @cl: client
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* @hbm_cmd: host bus message command
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* @len: buffer length
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*/
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static inline
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int mei_hbm_cl_write(struct mei_device *dev,
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struct mei_cl *cl, u8 hbm_cmd, size_t len)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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mei_hbm_hdr(mei_hdr, len);
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mei_hbm_cl_hdr(cl, hbm_cmd, dev->wr_msg.data, len);
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return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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}
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/**
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* mei_hbm_cl_addr_equal - tells if they have the same address
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*
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* @cl: - client
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* @buf: buffer with cl header
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*
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* returns true if addresses are the same
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*/
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static inline
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bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
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{
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struct mei_hbm_cl_cmd *cmd = buf;
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return cl->host_client_id == cmd->host_addr &&
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cl->me_client_id == cmd->me_addr;
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}
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int mei_hbm_start_wait(struct mei_device *dev)
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{
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int ret;
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if (dev->hbm_state > MEI_HBM_START)
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return 0;
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mutex_unlock(&dev->device_lock);
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ret = wait_event_interruptible_timeout(dev->wait_recvd_msg,
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dev->hbm_state == MEI_HBM_IDLE ||
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dev->hbm_state >= MEI_HBM_STARTED,
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mei_secs_to_jiffies(MEI_HBM_TIMEOUT));
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mutex_lock(&dev->device_lock);
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if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) {
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dev->hbm_state = MEI_HBM_IDLE;
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dev_err(&dev->pdev->dev, "waiting for mei start failed\n");
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return -ETIME;
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}
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return 0;
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}
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/**
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* mei_hbm_start_req - sends start request message.
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*
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* @dev: the device structure
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*
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* returns 0 on success and < 0 on failure
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*/
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int mei_hbm_start_req(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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struct hbm_host_version_request *start_req;
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const size_t len = sizeof(struct hbm_host_version_request);
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int ret;
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mei_hbm_reset(dev);
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mei_hbm_hdr(mei_hdr, len);
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/* host start message */
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start_req = (struct hbm_host_version_request *)dev->wr_msg.data;
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memset(start_req, 0, len);
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start_req->hbm_cmd = HOST_START_REQ_CMD;
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start_req->host_version.major_version = HBM_MAJOR_VERSION;
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start_req->host_version.minor_version = HBM_MINOR_VERSION;
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dev->hbm_state = MEI_HBM_IDLE;
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ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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if (ret) {
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dev_err(&dev->pdev->dev, "version message write failed: ret = %d\n",
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ret);
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return ret;
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}
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dev->hbm_state = MEI_HBM_START;
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dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
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return 0;
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}
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/*
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* mei_hbm_enum_clients_req - sends enumeration client request message.
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*
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* @dev: the device structure
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*
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* returns 0 on success and < 0 on failure
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*/
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static int mei_hbm_enum_clients_req(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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struct hbm_host_enum_request *enum_req;
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const size_t len = sizeof(struct hbm_host_enum_request);
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int ret;
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/* enumerate clients */
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mei_hbm_hdr(mei_hdr, len);
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enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
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memset(enum_req, 0, len);
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enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
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ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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if (ret) {
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dev_err(&dev->pdev->dev, "enumeration request write failed: ret = %d.\n",
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ret);
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return ret;
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}
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dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
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dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
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return 0;
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}
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/*
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* mei_hbm_me_cl_add - add new me client to the list
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*
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* @dev: the device structure
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* @res: hbm property response
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*
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* returns 0 on success and -ENOMEM on allocation failure
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*/
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static int mei_hbm_me_cl_add(struct mei_device *dev,
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struct hbm_props_response *res)
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{
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struct mei_me_client *me_cl;
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me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL);
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if (!me_cl)
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return -ENOMEM;
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me_cl->props = res->client_properties;
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me_cl->client_id = res->me_addr;
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me_cl->mei_flow_ctrl_creds = 0;
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list_add(&me_cl->list, &dev->me_clients);
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return 0;
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}
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/**
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* mei_hbm_prop_req - request property for a single client
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*
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* @dev: the device structure
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*
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* returns 0 on success and < 0 on failure
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*/
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static int mei_hbm_prop_req(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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struct hbm_props_request *prop_req;
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const size_t len = sizeof(struct hbm_props_request);
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unsigned long next_client_index;
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int ret;
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next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
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dev->me_client_index);
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/* We got all client properties */
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if (next_client_index == MEI_CLIENTS_MAX) {
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dev->hbm_state = MEI_HBM_STARTED;
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schedule_work(&dev->init_work);
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return 0;
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}
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mei_hbm_hdr(mei_hdr, len);
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prop_req = (struct hbm_props_request *)dev->wr_msg.data;
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memset(prop_req, 0, sizeof(struct hbm_props_request));
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prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
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prop_req->me_addr = next_client_index;
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ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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if (ret) {
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dev_err(&dev->pdev->dev, "properties request write failed: ret = %d\n",
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ret);
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return ret;
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}
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dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
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dev->me_client_index = next_client_index;
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return 0;
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}
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/*
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* mei_hbm_pg - sends pg command
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*
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* @dev: the device structure
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* @pg_cmd: the pg command code
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*
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* This function returns -EIO on write failure
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*/
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int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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struct hbm_power_gate *req;
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const size_t len = sizeof(struct hbm_power_gate);
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int ret;
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mei_hbm_hdr(mei_hdr, len);
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req = (struct hbm_power_gate *)dev->wr_msg.data;
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memset(req, 0, len);
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req->hbm_cmd = pg_cmd;
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ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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if (ret)
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dev_err(&dev->pdev->dev, "power gate command write failed.\n");
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return ret;
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}
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EXPORT_SYMBOL_GPL(mei_hbm_pg);
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/**
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* mei_hbm_stop_req - send stop request message
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*
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* @dev - mei device
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* @cl: client info
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*
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* This function returns -EIO on write failure
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*/
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static int mei_hbm_stop_req(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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struct hbm_host_stop_request *req =
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(struct hbm_host_stop_request *)dev->wr_msg.data;
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const size_t len = sizeof(struct hbm_host_stop_request);
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mei_hbm_hdr(mei_hdr, len);
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memset(req, 0, len);
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req->hbm_cmd = HOST_STOP_REQ_CMD;
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req->reason = DRIVER_STOP_REQUEST;
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return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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}
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/**
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* mei_hbm_cl_flow_control_req - sends flow control request.
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*
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* @dev: the device structure
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* @cl: client info
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*
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* This function returns -EIO on write failure
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*/
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int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
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{
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const size_t len = sizeof(struct hbm_flow_control);
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cl_dbg(dev, cl, "sending flow control\n");
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return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len);
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}
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/**
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* mei_hbm_add_single_flow_creds - adds single buffer credentials.
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*
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* @dev: the device structure
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* @flow: flow control.
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*
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* return 0 on success, < 0 otherwise
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*/
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static int mei_hbm_add_single_flow_creds(struct mei_device *dev,
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struct hbm_flow_control *flow)
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{
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struct mei_me_client *me_cl;
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me_cl = mei_me_cl_by_id(dev, flow->me_addr);
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if (!me_cl) {
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dev_err(&dev->pdev->dev, "no such me client %d\n",
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flow->me_addr);
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return -ENOENT;
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}
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if (WARN_ON(me_cl->props.single_recv_buf == 0))
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return -EINVAL;
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me_cl->mei_flow_ctrl_creds++;
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dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n",
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flow->me_addr, me_cl->mei_flow_ctrl_creds);
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return 0;
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}
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/**
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* mei_hbm_cl_flow_control_res - flow control response from me
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*
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* @dev: the device structure
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* @flow_control: flow control response bus message
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*/
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static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
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struct hbm_flow_control *flow_control)
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{
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struct mei_cl *cl;
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if (!flow_control->host_addr) {
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/* single receive buffer */
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mei_hbm_add_single_flow_creds(dev, flow_control);
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return;
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}
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/* normal connection */
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list_for_each_entry(cl, &dev->file_list, link) {
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if (mei_hbm_cl_addr_equal(cl, flow_control)) {
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cl->mei_flow_ctrl_creds++;
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dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d creds %d.\n",
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flow_control->host_addr, flow_control->me_addr,
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cl->mei_flow_ctrl_creds);
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break;
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}
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}
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}
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/**
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* mei_hbm_cl_disconnect_req - sends disconnect message to fw.
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*
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* @dev: the device structure
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* @cl: a client to disconnect from
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*
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* This function returns -EIO on write failure
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*/
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int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
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{
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const size_t len = sizeof(struct hbm_client_connect_request);
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return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len);
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}
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/**
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* mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW
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*
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* @dev: the device structure
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* @cl: a client to disconnect from
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*
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* This function returns -EIO on write failure
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*/
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int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl)
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{
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const size_t len = sizeof(struct hbm_client_connect_response);
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return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len);
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}
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/**
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* mei_hbm_cl_disconnect_res - disconnect response from ME
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*
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* @dev: the device structure
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* @rs: disconnect response bus message
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*/
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static void mei_hbm_cl_disconnect_res(struct mei_device *dev,
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struct hbm_client_connect_response *rs)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *cb, *next;
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dev_dbg(&dev->pdev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n",
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rs->me_addr, rs->host_addr, rs->status);
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list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) {
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cl = cb->cl;
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/* this should not happen */
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if (WARN_ON(!cl)) {
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list_del(&cb->list);
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return;
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}
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if (mei_hbm_cl_addr_equal(cl, rs)) {
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list_del(&cb->list);
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if (rs->status == MEI_CL_DISCONN_SUCCESS)
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cl->state = MEI_FILE_DISCONNECTED;
|
|
|
|
cl->status = 0;
|
|
cl->timer_count = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* mei_hbm_cl_connect_req - send connection request to specific me client
|
|
*
|
|
* @dev: the device structure
|
|
* @cl: a client to connect to
|
|
*
|
|
* returns -EIO on write failure
|
|
*/
|
|
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
|
|
{
|
|
const size_t len = sizeof(struct hbm_client_connect_request);
|
|
return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len);
|
|
}
|
|
|
|
/**
|
|
* mei_hbm_cl_connect_res - connect response from the ME
|
|
*
|
|
* @dev: the device structure
|
|
* @rs: connect response bus message
|
|
*/
|
|
static void mei_hbm_cl_connect_res(struct mei_device *dev,
|
|
struct hbm_client_connect_response *rs)
|
|
{
|
|
|
|
struct mei_cl *cl;
|
|
struct mei_cl_cb *cb, *next;
|
|
|
|
dev_dbg(&dev->pdev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n",
|
|
rs->me_addr, rs->host_addr,
|
|
mei_cl_conn_status_str(rs->status));
|
|
|
|
cl = NULL;
|
|
|
|
list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) {
|
|
|
|
cl = cb->cl;
|
|
/* this should not happen */
|
|
if (WARN_ON(!cl)) {
|
|
list_del_init(&cb->list);
|
|
continue;
|
|
}
|
|
|
|
if (cb->fop_type != MEI_FOP_CONNECT)
|
|
continue;
|
|
|
|
if (mei_hbm_cl_addr_equal(cl, rs)) {
|
|
list_del(&cb->list);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!cl)
|
|
return;
|
|
|
|
cl->timer_count = 0;
|
|
if (rs->status == MEI_CL_CONN_SUCCESS)
|
|
cl->state = MEI_FILE_CONNECTED;
|
|
else
|
|
cl->state = MEI_FILE_DISCONNECTED;
|
|
cl->status = mei_cl_conn_status_to_errno(rs->status);
|
|
}
|
|
|
|
|
|
/**
|
|
* mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware
|
|
* host sends disconnect response
|
|
*
|
|
* @dev: the device structure.
|
|
* @disconnect_req: disconnect request bus message from the me
|
|
*
|
|
* returns -ENOMEM on allocation failure
|
|
*/
|
|
static int mei_hbm_fw_disconnect_req(struct mei_device *dev,
|
|
struct hbm_client_connect_request *disconnect_req)
|
|
{
|
|
struct mei_cl *cl;
|
|
struct mei_cl_cb *cb;
|
|
|
|
list_for_each_entry(cl, &dev->file_list, link) {
|
|
if (mei_hbm_cl_addr_equal(cl, disconnect_req)) {
|
|
dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
|
|
disconnect_req->host_addr,
|
|
disconnect_req->me_addr);
|
|
cl->state = MEI_FILE_DISCONNECTED;
|
|
cl->timer_count = 0;
|
|
|
|
cb = mei_io_cb_init(cl, NULL);
|
|
if (!cb)
|
|
return -ENOMEM;
|
|
cb->fop_type = MEI_FOP_DISCONNECT_RSP;
|
|
cl_dbg(dev, cl, "add disconnect response as first\n");
|
|
list_add(&cb->list, &dev->ctrl_wr_list.list);
|
|
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* mei_hbm_version_is_supported - checks whether the driver can
|
|
* support the hbm version of the device
|
|
*
|
|
* @dev: the device structure
|
|
* returns true if driver can support hbm version of the device
|
|
*/
|
|
bool mei_hbm_version_is_supported(struct mei_device *dev)
|
|
{
|
|
return (dev->version.major_version < HBM_MAJOR_VERSION) ||
|
|
(dev->version.major_version == HBM_MAJOR_VERSION &&
|
|
dev->version.minor_version <= HBM_MINOR_VERSION);
|
|
}
|
|
|
|
/**
|
|
* mei_hbm_dispatch - bottom half read routine after ISR to
|
|
* handle the read bus message cmd processing.
|
|
*
|
|
* @dev: the device structure
|
|
* @mei_hdr: header of bus message
|
|
*
|
|
* returns 0 on success and < 0 on failure
|
|
*/
|
|
int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
|
|
{
|
|
struct mei_bus_message *mei_msg;
|
|
struct hbm_host_version_response *version_res;
|
|
struct hbm_client_connect_response *connect_res;
|
|
struct hbm_client_connect_response *disconnect_res;
|
|
struct hbm_client_connect_request *disconnect_req;
|
|
struct hbm_flow_control *flow_control;
|
|
struct hbm_props_response *props_res;
|
|
struct hbm_host_enum_response *enum_res;
|
|
|
|
/* read the message to our buffer */
|
|
BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
|
|
mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
|
|
mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
|
|
|
|
/* ignore spurious message and prevent reset nesting
|
|
* hbm is put to idle during system reset
|
|
*/
|
|
if (dev->hbm_state == MEI_HBM_IDLE) {
|
|
dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n");
|
|
return 0;
|
|
}
|
|
|
|
switch (mei_msg->hbm_cmd) {
|
|
case HOST_START_RES_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n");
|
|
|
|
dev->init_clients_timer = 0;
|
|
|
|
version_res = (struct hbm_host_version_response *)mei_msg;
|
|
|
|
dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n",
|
|
HBM_MAJOR_VERSION, HBM_MINOR_VERSION,
|
|
version_res->me_max_version.major_version,
|
|
version_res->me_max_version.minor_version);
|
|
|
|
if (version_res->host_version_supported) {
|
|
dev->version.major_version = HBM_MAJOR_VERSION;
|
|
dev->version.minor_version = HBM_MINOR_VERSION;
|
|
} else {
|
|
dev->version.major_version =
|
|
version_res->me_max_version.major_version;
|
|
dev->version.minor_version =
|
|
version_res->me_max_version.minor_version;
|
|
}
|
|
|
|
if (!mei_hbm_version_is_supported(dev)) {
|
|
dev_warn(&dev->pdev->dev, "hbm: start: version mismatch - stopping the driver.\n");
|
|
|
|
dev->hbm_state = MEI_HBM_STOPPED;
|
|
if (mei_hbm_stop_req(dev)) {
|
|
dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n");
|
|
return -EIO;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
|
|
dev->hbm_state != MEI_HBM_START) {
|
|
dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n",
|
|
dev->dev_state, dev->hbm_state);
|
|
return -EPROTO;
|
|
}
|
|
|
|
dev->hbm_state = MEI_HBM_STARTED;
|
|
|
|
if (mei_hbm_enum_clients_req(dev)) {
|
|
dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n");
|
|
return -EIO;
|
|
}
|
|
|
|
wake_up_interruptible(&dev->wait_recvd_msg);
|
|
break;
|
|
|
|
case CLIENT_CONNECT_RES_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n");
|
|
|
|
connect_res = (struct hbm_client_connect_response *) mei_msg;
|
|
mei_hbm_cl_connect_res(dev, connect_res);
|
|
wake_up(&dev->wait_recvd_msg);
|
|
break;
|
|
|
|
case CLIENT_DISCONNECT_RES_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n");
|
|
|
|
disconnect_res = (struct hbm_client_connect_response *) mei_msg;
|
|
mei_hbm_cl_disconnect_res(dev, disconnect_res);
|
|
wake_up(&dev->wait_recvd_msg);
|
|
break;
|
|
|
|
case MEI_FLOW_CONTROL_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n");
|
|
|
|
flow_control = (struct hbm_flow_control *) mei_msg;
|
|
mei_hbm_cl_flow_control_res(dev, flow_control);
|
|
break;
|
|
|
|
case MEI_PG_ISOLATION_ENTRY_RES_CMD:
|
|
dev_dbg(&dev->pdev->dev, "power gate isolation entry response received\n");
|
|
dev->pg_event = MEI_PG_EVENT_RECEIVED;
|
|
if (waitqueue_active(&dev->wait_pg))
|
|
wake_up(&dev->wait_pg);
|
|
break;
|
|
|
|
case MEI_PG_ISOLATION_EXIT_REQ_CMD:
|
|
dev_dbg(&dev->pdev->dev, "power gate isolation exit request received\n");
|
|
dev->pg_event = MEI_PG_EVENT_RECEIVED;
|
|
if (waitqueue_active(&dev->wait_pg))
|
|
wake_up(&dev->wait_pg);
|
|
else
|
|
/*
|
|
* If the driver is not waiting on this then
|
|
* this is HW initiated exit from PG.
|
|
* Start runtime pm resume sequence to exit from PG.
|
|
*/
|
|
pm_request_resume(&dev->pdev->dev);
|
|
break;
|
|
|
|
case HOST_CLIENT_PROPERTIES_RES_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n");
|
|
|
|
dev->init_clients_timer = 0;
|
|
|
|
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
|
|
dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
|
|
dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n",
|
|
dev->dev_state, dev->hbm_state);
|
|
return -EPROTO;
|
|
}
|
|
|
|
props_res = (struct hbm_props_response *)mei_msg;
|
|
|
|
if (props_res->status) {
|
|
dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n",
|
|
props_res->status);
|
|
return -EPROTO;
|
|
}
|
|
|
|
mei_hbm_me_cl_add(dev, props_res);
|
|
|
|
dev->me_client_index++;
|
|
dev->me_client_presentation_num++;
|
|
|
|
/* request property for the next client */
|
|
if (mei_hbm_prop_req(dev))
|
|
return -EIO;
|
|
|
|
break;
|
|
|
|
case HOST_ENUM_RES_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n");
|
|
|
|
dev->init_clients_timer = 0;
|
|
|
|
enum_res = (struct hbm_host_enum_response *) mei_msg;
|
|
BUILD_BUG_ON(sizeof(dev->me_clients_map)
|
|
< sizeof(enum_res->valid_addresses));
|
|
memcpy(dev->me_clients_map, enum_res->valid_addresses,
|
|
sizeof(enum_res->valid_addresses));
|
|
|
|
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
|
|
dev->hbm_state != MEI_HBM_ENUM_CLIENTS) {
|
|
dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n",
|
|
dev->dev_state, dev->hbm_state);
|
|
return -EPROTO;
|
|
}
|
|
|
|
dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
|
|
|
|
/* first property request */
|
|
if (mei_hbm_prop_req(dev))
|
|
return -EIO;
|
|
|
|
break;
|
|
|
|
case HOST_STOP_RES_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n");
|
|
|
|
dev->init_clients_timer = 0;
|
|
|
|
if (dev->hbm_state != MEI_HBM_STOPPED) {
|
|
dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n",
|
|
dev->dev_state, dev->hbm_state);
|
|
return -EPROTO;
|
|
}
|
|
|
|
dev->dev_state = MEI_DEV_POWER_DOWN;
|
|
dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n");
|
|
/* force the reset */
|
|
return -EPROTO;
|
|
break;
|
|
|
|
case CLIENT_DISCONNECT_REQ_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n");
|
|
|
|
disconnect_req = (struct hbm_client_connect_request *)mei_msg;
|
|
mei_hbm_fw_disconnect_req(dev, disconnect_req);
|
|
break;
|
|
|
|
case ME_STOP_REQ_CMD:
|
|
dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n");
|
|
dev->hbm_state = MEI_HBM_STOPPED;
|
|
if (mei_hbm_stop_req(dev)) {
|
|
dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n");
|
|
return -EIO;
|
|
}
|
|
break;
|
|
default:
|
|
BUG();
|
|
break;
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|