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-rw-r--r--drivers/staging/mei/interrupt.c1590
1 files changed, 0 insertions, 1590 deletions
diff --git a/drivers/staging/mei/interrupt.c b/drivers/staging/mei/interrupt.c
deleted file mode 100644
index 2007d24..0000000
--- a/drivers/staging/mei/interrupt.c
+++ /dev/null
@@ -1,1590 +0,0 @@
-/*
- *
- * Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2012, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- */
-
-
-#include <linux/pci.h>
-#include <linux/kthread.h>
-#include <linux/interrupt.h>
-#include <linux/fs.h>
-#include <linux/jiffies.h>
-
-#include "mei_dev.h"
-#include "mei.h"
-#include "hw.h"
-#include "interface.h"
-
-
-/**
- * mei_interrupt_quick_handler - The ISR of the MEI device
- *
- * @irq: The irq number
- * @dev_id: pointer to the device structure
- *
- * returns irqreturn_t
- */
-irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id)
-{
- struct mei_device *dev = (struct mei_device *) dev_id;
- u32 csr_reg = mei_hcsr_read(dev);
-
- if ((csr_reg & H_IS) != H_IS)
- return IRQ_NONE;
-
- /* clear H_IS bit in H_CSR */
- mei_reg_write(dev, H_CSR, csr_reg);
-
- return IRQ_WAKE_THREAD;
-}
-
-/**
- * _mei_cmpl - processes completed operation.
- *
- * @cl: private data of the file object.
- * @cb_pos: callback block.
- */
-static void _mei_cmpl(struct mei_cl *cl, struct mei_cl_cb *cb_pos)
-{
- if (cb_pos->major_file_operations == MEI_WRITE) {
- mei_free_cb_private(cb_pos);
- cb_pos = NULL;
- cl->writing_state = MEI_WRITE_COMPLETE;
- if (waitqueue_active(&cl->tx_wait))
- wake_up_interruptible(&cl->tx_wait);
-
- } else if (cb_pos->major_file_operations == MEI_READ &&
- MEI_READING == cl->reading_state) {
- cl->reading_state = MEI_READ_COMPLETE;
- if (waitqueue_active(&cl->rx_wait))
- wake_up_interruptible(&cl->rx_wait);
-
- }
-}
-
-/**
- * _mei_cmpl_iamthif - processes completed iamthif operation.
- *
- * @dev: the device structure.
- * @cb_pos: callback block.
- */
-static void _mei_cmpl_iamthif(struct mei_device *dev, struct mei_cl_cb *cb_pos)
-{
- if (dev->iamthif_canceled != 1) {
- dev->iamthif_state = MEI_IAMTHIF_READ_COMPLETE;
- dev->iamthif_stall_timer = 0;
- memcpy(cb_pos->response_buffer.data,
- dev->iamthif_msg_buf,
- dev->iamthif_msg_buf_index);
- list_add_tail(&cb_pos->cb_list,
- &dev->amthi_read_complete_list.mei_cb.cb_list);
- dev_dbg(&dev->pdev->dev, "amthi read completed.\n");
- dev->iamthif_timer = jiffies;
- dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
- dev->iamthif_timer);
- } else {
- mei_run_next_iamthif_cmd(dev);
- }
-
- dev_dbg(&dev->pdev->dev, "completing amthi call back.\n");
- wake_up_interruptible(&dev->iamthif_cl.wait);
-}
-
-
-/**
- * mei_irq_thread_read_amthi_message - bottom half read routine after ISR to
- * handle the read amthi message data processing.
- *
- * @complete_list: An instance of our list structure
- * @dev: the device structure
- * @mei_hdr: header of amthi message
- *
- * returns 0 on success, <0 on failure.
- */
-static int mei_irq_thread_read_amthi_message(struct mei_io_list *complete_list,
- struct mei_device *dev,
- struct mei_msg_hdr *mei_hdr)
-{
- struct mei_cl *cl;
- struct mei_cl_cb *cb;
- unsigned char *buffer;
-
- BUG_ON(mei_hdr->me_addr != dev->iamthif_cl.me_client_id);
- BUG_ON(dev->iamthif_state != MEI_IAMTHIF_READING);
-
- buffer = dev->iamthif_msg_buf + dev->iamthif_msg_buf_index;
- BUG_ON(dev->iamthif_mtu < dev->iamthif_msg_buf_index + mei_hdr->length);
-
- mei_read_slots(dev, buffer, mei_hdr->length);
-
- dev->iamthif_msg_buf_index += mei_hdr->length;
-
- if (!mei_hdr->msg_complete)
- return 0;
-
- dev_dbg(&dev->pdev->dev,
- "amthi_message_buffer_index =%d\n",
- mei_hdr->length);
-
- dev_dbg(&dev->pdev->dev, "completed amthi read.\n ");
- if (!dev->iamthif_current_cb)
- return -ENODEV;
-
- cb = dev->iamthif_current_cb;
- dev->iamthif_current_cb = NULL;
-
- cl = (struct mei_cl *)cb->file_private;
- if (!cl)
- return -ENODEV;
-
- dev->iamthif_stall_timer = 0;
- cb->information = dev->iamthif_msg_buf_index;
- cb->read_time = jiffies;
- if (dev->iamthif_ioctl && cl == &dev->iamthif_cl) {
- /* found the iamthif cb */
- dev_dbg(&dev->pdev->dev, "complete the amthi read cb.\n ");
- dev_dbg(&dev->pdev->dev, "add the amthi read cb to complete.\n ");
- list_add_tail(&cb->cb_list,
- &complete_list->mei_cb.cb_list);
- }
- return 0;
-}
-
-/**
- * _mei_irq_thread_state_ok - checks if mei header matches file private data
- *
- * @cl: private data of the file object
- * @mei_hdr: header of mei client message
- *
- * returns !=0 if matches, 0 if no match.
- */
-static int _mei_irq_thread_state_ok(struct mei_cl *cl,
- struct mei_msg_hdr *mei_hdr)
-{
- return (cl->host_client_id == mei_hdr->host_addr &&
- cl->me_client_id == mei_hdr->me_addr &&
- cl->state == MEI_FILE_CONNECTED &&
- MEI_READ_COMPLETE != cl->reading_state);
-}
-
-/**
- * mei_irq_thread_read_client_message - bottom half read routine after ISR to
- * handle the read mei client message data processing.
- *
- * @complete_list: An instance of our list structure
- * @dev: the device structure
- * @mei_hdr: header of mei client message
- *
- * returns 0 on success, <0 on failure.
- */
-static int mei_irq_thread_read_client_message(struct mei_io_list *complete_list,
- struct mei_device *dev,
- struct mei_msg_hdr *mei_hdr)
-{
- struct mei_cl *cl;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
- unsigned char *buffer = NULL;
-
- dev_dbg(&dev->pdev->dev, "start client msg\n");
- if (list_empty(&dev->read_list.mei_cb.cb_list))
- goto quit;
-
- list_for_each_entry_safe(cb_pos, cb_next,
- &dev->read_list.mei_cb.cb_list, cb_list) {
- cl = (struct mei_cl *)cb_pos->file_private;
- if (cl && _mei_irq_thread_state_ok(cl, mei_hdr)) {
- cl->reading_state = MEI_READING;
- buffer = cb_pos->response_buffer.data + cb_pos->information;
-
- if (cb_pos->response_buffer.size <
- mei_hdr->length + cb_pos->information) {
- dev_dbg(&dev->pdev->dev, "message overflow.\n");
- list_del(&cb_pos->cb_list);
- return -ENOMEM;
- }
- if (buffer)
- mei_read_slots(dev, buffer, mei_hdr->length);
-
- cb_pos->information += mei_hdr->length;
- if (mei_hdr->msg_complete) {
- cl->status = 0;
- list_del(&cb_pos->cb_list);
- dev_dbg(&dev->pdev->dev,
- "completed read host client = %d,"
- "ME client = %d, "
- "data length = %lu\n",
- cl->host_client_id,
- cl->me_client_id,
- cb_pos->information);
-
- *(cb_pos->response_buffer.data +
- cb_pos->information) = '\0';
- dev_dbg(&dev->pdev->dev, "cb_pos->res_buffer - %s\n",
- cb_pos->response_buffer.data);
- list_add_tail(&cb_pos->cb_list,
- &complete_list->mei_cb.cb_list);
- }
-
- break;
- }
-
- }
-
-quit:
- dev_dbg(&dev->pdev->dev, "message read\n");
- if (!buffer) {
- mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length);
- dev_dbg(&dev->pdev->dev, "discarding message, header =%08x.\n",
- *(u32 *) dev->rd_msg_buf);
- }
-
- return 0;
-}
-
-/**
- * _mei_irq_thread_iamthif_read - prepares to read iamthif data.
- *
- * @dev: the device structure.
- * @slots: free slots.
- *
- * returns 0, OK; otherwise, error.
- */
-static int _mei_irq_thread_iamthif_read(struct mei_device *dev, s32 *slots)
-{
-
- if (((*slots) * sizeof(u32)) < (sizeof(struct mei_msg_hdr)
- + sizeof(struct hbm_flow_control))) {
- return -EMSGSIZE;
- }
- *slots -= (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_flow_control) + 3) / 4;
- if (mei_send_flow_control(dev, &dev->iamthif_cl)) {
- dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
- return -EIO;
- }
-
- dev_dbg(&dev->pdev->dev, "iamthif flow control success\n");
- dev->iamthif_state = MEI_IAMTHIF_READING;
- dev->iamthif_flow_control_pending = false;
- dev->iamthif_msg_buf_index = 0;
- dev->iamthif_msg_buf_size = 0;
- dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
- dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev);
- return 0;
-}
-
-/**
- * _mei_irq_thread_close - processes close related operation.
- *
- * @dev: the device structure.
- * @slots: free slots.
- * @cb_pos: callback block.
- * @cl: private data of the file object.
- * @cmpl_list: complete list.
- *
- * returns 0, OK; otherwise, error.
- */
-static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots,
- struct mei_cl_cb *cb_pos,
- struct mei_cl *cl,
- struct mei_io_list *cmpl_list)
-{
- if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_disconnect_request))) {
- *slots -= (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_disconnect_request) + 3) / 4;
-
- if (mei_disconnect(dev, cl)) {
- cl->status = 0;
- cb_pos->information = 0;
- list_move_tail(&cb_pos->cb_list,
- &cmpl_list->mei_cb.cb_list);
- return -EMSGSIZE;
- } else {
- cl->state = MEI_FILE_DISCONNECTING;
- cl->status = 0;
- cb_pos->information = 0;
- list_move_tail(&cb_pos->cb_list,
- &dev->ctrl_rd_list.mei_cb.cb_list);
- cl->timer_count = MEI_CONNECT_TIMEOUT;
- }
- } else {
- /* return the cancel routine */
- return -EBADMSG;
- }
-
- return 0;
-}
-
-/**
- * is_treat_specially_client - checks if the message belongs
- * to the file private data.
- *
- * @cl: private data of the file object
- * @rs: connect response bus message
- *
- */
-static bool is_treat_specially_client(struct mei_cl *cl,
- struct hbm_client_connect_response *rs)
-{
-
- if (cl->host_client_id == rs->host_addr &&
- cl->me_client_id == rs->me_addr) {
- if (!rs->status) {
- cl->state = MEI_FILE_CONNECTED;
- cl->status = 0;
-
- } else {
- cl->state = MEI_FILE_DISCONNECTED;
- cl->status = -ENODEV;
- }
- cl->timer_count = 0;
-
- return true;
- }
- return false;
-}
-
-/**
- * mei_client_connect_response - connects to response irq routine
- *
- * @dev: the device structure
- * @rs: connect response bus message
- */
-static void mei_client_connect_response(struct mei_device *dev,
- struct hbm_client_connect_response *rs)
-{
-
- struct mei_cl *cl;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
-
- dev_dbg(&dev->pdev->dev,
- "connect_response:\n"
- "ME Client = %d\n"
- "Host Client = %d\n"
- "Status = %d\n",
- rs->me_addr,
- rs->host_addr,
- rs->status);
-
- /* if WD or iamthif client treat specially */
-
- if (is_treat_specially_client(&(dev->wd_cl), rs)) {
- dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
- mei_watchdog_register(dev);
-
- /* next step in the state maching */
- mei_host_init_iamthif(dev);
- return;
- }
-
- if (is_treat_specially_client(&(dev->iamthif_cl), rs)) {
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- return;
- }
- list_for_each_entry_safe(cb_pos, cb_next,
- &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
-
- cl = (struct mei_cl *)cb_pos->file_private;
- if (!cl) {
- list_del(&cb_pos->cb_list);
- return;
- }
- if (MEI_IOCTL == cb_pos->major_file_operations) {
- if (is_treat_specially_client(cl, rs)) {
- list_del(&cb_pos->cb_list);
- cl->status = 0;
- cl->timer_count = 0;
- break;
- }
- }
- }
-}
-
-/**
- * mei_client_disconnect_response - disconnects from response irq routine
- *
- * @dev: the device structure
- * @rs: disconnect response bus message
- */
-static void mei_client_disconnect_response(struct mei_device *dev,
- struct hbm_client_connect_response *rs)
-{
- struct mei_cl *cl;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
-
- dev_dbg(&dev->pdev->dev,
- "disconnect_response:\n"
- "ME Client = %d\n"
- "Host Client = %d\n"
- "Status = %d\n",
- rs->me_addr,
- rs->host_addr,
- rs->status);
-
- list_for_each_entry_safe(cb_pos, cb_next,
- &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
- cl = (struct mei_cl *)cb_pos->file_private;
-
- if (!cl) {
- list_del(&cb_pos->cb_list);
- return;
- }
-
- dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
- if (cl->host_client_id == rs->host_addr &&
- cl->me_client_id == rs->me_addr) {
-
- list_del(&cb_pos->cb_list);
- if (!rs->status)
- cl->state = MEI_FILE_DISCONNECTED;
-
- cl->status = 0;
- cl->timer_count = 0;
- break;
- }
- }
-}
-
-/**
- * same_flow_addr - tells if they have the same address.
- *
- * @file: private data of the file object.
- * @flow: flow control.
- *
- * returns !=0, same; 0,not.
- */
-static int same_flow_addr(struct mei_cl *cl, struct hbm_flow_control *flow)
-{
- return (cl->host_client_id == flow->host_addr &&
- cl->me_client_id == flow->me_addr);
-}
-
-/**
- * add_single_flow_creds - adds single buffer credentials.
- *
- * @file: private data ot the file object.
- * @flow: flow control.
- */
-static void add_single_flow_creds(struct mei_device *dev,
- struct hbm_flow_control *flow)
-{
- struct mei_me_client *client;
- int i;
-
- for (i = 0; i < dev->me_clients_num; i++) {
- client = &dev->me_clients[i];
- if (client && flow->me_addr == client->client_id) {
- if (client->props.single_recv_buf) {
- client->mei_flow_ctrl_creds++;
- dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
- flow->me_addr);
- dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
- client->mei_flow_ctrl_creds);
- } else {
- BUG(); /* error in flow control */
- }
- }
- }
-}
-
-/**
- * mei_client_flow_control_response - flow control response irq routine
- *
- * @dev: the device structure
- * @flow_control: flow control response bus message
- */
-static void mei_client_flow_control_response(struct mei_device *dev,
- struct hbm_flow_control *flow_control)
-{
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
-
- if (!flow_control->host_addr) {
- /* single receive buffer */
- add_single_flow_creds(dev, flow_control);
- } else {
- /* normal connection */
- list_for_each_entry_safe(cl_pos, cl_next,
- &dev->file_list, link) {
- dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in file_list\n");
-
- dev_dbg(&dev->pdev->dev, "cl of host client %d ME client %d.\n",
- cl_pos->host_client_id,
- cl_pos->me_client_id);
- dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
- flow_control->host_addr,
- flow_control->me_addr);
- if (same_flow_addr(cl_pos, flow_control)) {
- dev_dbg(&dev->pdev->dev, "recv ctrl msg for host %d ME %d.\n",
- flow_control->host_addr,
- flow_control->me_addr);
- cl_pos->mei_flow_ctrl_creds++;
- dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
- cl_pos->mei_flow_ctrl_creds);
- break;
- }
- }
- }
-}
-
-/**
- * same_disconn_addr - tells if they have the same address
- *
- * @file: private data of the file object.
- * @disconn: disconnection request.
- *
- * returns !=0, same; 0,not.
- */
-static int same_disconn_addr(struct mei_cl *cl,
- struct hbm_client_disconnect_request *disconn)
-{
- return (cl->host_client_id == disconn->host_addr &&
- cl->me_client_id == disconn->me_addr);
-}
-
-/**
- * mei_client_disconnect_request - disconnects from request irq routine
- *
- * @dev: the device structure.
- * @disconnect_req: disconnect request bus message.
- */
-static void mei_client_disconnect_request(struct mei_device *dev,
- struct hbm_client_disconnect_request *disconnect_req)
-{
- struct mei_msg_hdr *mei_hdr;
- struct hbm_client_connect_response *disconnect_res;
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
-
- list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
- if (same_disconn_addr(cl_pos, 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_pos->state = MEI_FILE_DISCONNECTED;
- cl_pos->timer_count = 0;
- if (cl_pos == &dev->wd_cl) {
- dev->wd_due_counter = 0;
- dev->wd_pending = false;
- } else if (cl_pos == &dev->iamthif_cl)
- dev->iamthif_timer = 0;
-
- /* prepare disconnect response */
- mei_hdr =
- (struct mei_msg_hdr *) &dev->ext_msg_buf[0];
- mei_hdr->host_addr = 0;
- mei_hdr->me_addr = 0;
- mei_hdr->length =
- sizeof(struct hbm_client_connect_response);
- mei_hdr->msg_complete = 1;
- mei_hdr->reserved = 0;
-
- disconnect_res =
- (struct hbm_client_connect_response *)
- &dev->ext_msg_buf[1];
- disconnect_res->host_addr = cl_pos->host_client_id;
- disconnect_res->me_addr = cl_pos->me_client_id;
- disconnect_res->hbm_cmd = CLIENT_DISCONNECT_RES_CMD;
- disconnect_res->status = 0;
- dev->extra_write_index = 2;
- break;
- }
- }
-}
-
-
-/**
- * mei_irq_thread_read_bus_message - bottom half read routine after ISR to
- * handle the read bus message cmd processing.
- *
- * @dev: the device structure
- * @mei_hdr: header of bus message
- */
-static void mei_irq_thread_read_bus_message(struct mei_device *dev,
- struct mei_msg_hdr *mei_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_flow_control *flow_control;
- struct hbm_props_response *props_res;
- struct hbm_host_enum_response *enum_res;
- struct hbm_client_disconnect_request *disconnect_req;
- struct hbm_host_stop_request *host_stop_req;
- int res;
-
-
- /* read the message to our buffer */
- BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf));
- mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length);
- mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
-
- switch (mei_msg->hbm_cmd) {
- case HOST_START_RES_CMD:
- version_res = (struct hbm_host_version_response *) mei_msg;
- if (version_res->host_version_supported) {
- dev->version.major_version = HBM_MAJOR_VERSION;
- dev->version.minor_version = HBM_MINOR_VERSION;
- if (dev->mei_state == MEI_INIT_CLIENTS &&
- dev->init_clients_state == MEI_START_MESSAGE) {
- dev->init_clients_timer = 0;
- mei_host_enum_clients_message(dev);
- } else {
- dev->recvd_msg = false;
- dev_dbg(&dev->pdev->dev, "IMEI reset due to received host start response bus message.\n");
- mei_reset(dev, 1);
- return;
- }
- } else {
- dev->version = version_res->me_max_version;
- /* send stop message */
- mei_hdr = (struct mei_msg_hdr *)&dev->wr_msg_buf[0];
- mei_hdr->host_addr = 0;
- mei_hdr->me_addr = 0;
- mei_hdr->length = sizeof(struct hbm_host_stop_request);
- mei_hdr->msg_complete = 1;
- mei_hdr->reserved = 0;
-
- host_stop_req = (struct hbm_host_stop_request *)
- &dev->wr_msg_buf[1];
-
- memset(host_stop_req,
- 0,
- sizeof(struct hbm_host_stop_request));
- host_stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
- host_stop_req->reason = DRIVER_STOP_REQUEST;
- mei_write_message(dev, mei_hdr,
- (unsigned char *) (host_stop_req),
- mei_hdr->length);
- dev_dbg(&dev->pdev->dev, "version mismatch.\n");
- return;
- }
-
- dev->recvd_msg = true;
- dev_dbg(&dev->pdev->dev, "host start response message received.\n");
- break;
-
- case CLIENT_CONNECT_RES_CMD:
- connect_res =
- (struct hbm_client_connect_response *) mei_msg;
- mei_client_connect_response(dev, connect_res);
- dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
- wake_up(&dev->wait_recvd_msg);
- break;
-
- case CLIENT_DISCONNECT_RES_CMD:
- disconnect_res =
- (struct hbm_client_connect_response *) mei_msg;
- mei_client_disconnect_response(dev, disconnect_res);
- dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
- wake_up(&dev->wait_recvd_msg);
- break;
-
- case MEI_FLOW_CONTROL_CMD:
- flow_control = (struct hbm_flow_control *) mei_msg;
- mei_client_flow_control_response(dev, flow_control);
- dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
- break;
-
- case HOST_CLIENT_PROPERTIES_RES_CMD:
- props_res = (struct hbm_props_response *)mei_msg;
- if (props_res->status || !dev->me_clients) {
- dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
- mei_reset(dev, 1);
- return;
- }
- if (dev->me_clients[dev->me_client_presentation_num]
- .client_id == props_res->address) {
-
- dev->me_clients[dev->me_client_presentation_num].props
- = props_res->client_properties;
-
- if (dev->mei_state == MEI_INIT_CLIENTS &&
- dev->init_clients_state ==
- MEI_CLIENT_PROPERTIES_MESSAGE) {
- dev->me_client_index++;
- dev->me_client_presentation_num++;
-
- /** Send Client Properties request **/
- res = mei_host_client_properties(dev);
- if (res < 0) {
- dev_dbg(&dev->pdev->dev, "mei_host_client_properties() failed");
- return;
- } else if (!res) {
- /*
- * No more clients to send to.
- * Clear Map for indicating now ME clients
- * with associated host client
- */
- bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
- dev->open_handle_count = 0;
-
- /*
- * Reserving the first three client IDs
- * Client Id 0 - Reserved for MEI Bus Message communications
- * Client Id 1 - Reserved for Watchdog
- * Client ID 2 - Reserved for AMTHI
- */
- bitmap_set(dev->host_clients_map, 0, 3);
- dev->mei_state = MEI_ENABLED;
-
- /* if wd initialization fails, initialization the AMTHI client,
- * otherwise the AMTHI client will be initialized after the WD client connect response
- * will be received
- */
- if (mei_wd_host_init(dev))
- mei_host_init_iamthif(dev);
- }
-
- } else {
- dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message");
- mei_reset(dev, 1);
- return;
- }
- } else {
- dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message for wrong client ID\n");
- mei_reset(dev, 1);
- return;
- }
- break;
-
- case HOST_ENUM_RES_CMD:
- enum_res = (struct hbm_host_enum_response *) mei_msg;
- memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
- if (dev->mei_state == MEI_INIT_CLIENTS &&
- dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) {
- dev->init_clients_timer = 0;
- dev->me_client_presentation_num = 0;
- dev->me_client_index = 0;
- mei_allocate_me_clients_storage(dev);
- dev->init_clients_state =
- MEI_CLIENT_PROPERTIES_MESSAGE;
- mei_host_client_properties(dev);
- } else {
- dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
- mei_reset(dev, 1);
- return;
- }
- break;
-
- case HOST_STOP_RES_CMD:
- dev->mei_state = MEI_DISABLED;
- dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n");
- mei_reset(dev, 1);
- break;
-
- case CLIENT_DISCONNECT_REQ_CMD:
- /* search for client */
- disconnect_req =
- (struct hbm_client_disconnect_request *) mei_msg;
- mei_client_disconnect_request(dev, disconnect_req);
- break;
-
- case ME_STOP_REQ_CMD:
- /* prepare stop request */
- mei_hdr = (struct mei_msg_hdr *) &dev->ext_msg_buf[0];
- mei_hdr->host_addr = 0;
- mei_hdr->me_addr = 0;
- mei_hdr->length = sizeof(struct hbm_host_stop_request);
- mei_hdr->msg_complete = 1;
- mei_hdr->reserved = 0;
- host_stop_req =
- (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
- memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
- host_stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
- host_stop_req->reason = DRIVER_STOP_REQUEST;
- host_stop_req->reserved[0] = 0;
- host_stop_req->reserved[1] = 0;
- dev->extra_write_index = 2;
- break;
-
- default:
- BUG();
- break;
-
- }
-}
-
-
-/**
- * _mei_hb_read - processes read related operation.
- *
- * @dev: the device structure.
- * @slots: free slots.
- * @cb_pos: callback block.
- * @cl: private data of the file object.
- * @cmpl_list: complete list.
- *
- * returns 0, OK; otherwise, error.
- */
-static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots,
- struct mei_cl_cb *cb_pos,
- struct mei_cl *cl,
- struct mei_io_list *cmpl_list)
-{
- if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_flow_control))) {
- /* return the cancel routine */
- list_del(&cb_pos->cb_list);
- return -EBADMSG;
- }
-
- *slots -= (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_flow_control) + 3) / 4;
- if (mei_send_flow_control(dev, cl)) {
- cl->status = -ENODEV;
- cb_pos->information = 0;
- list_move_tail(&cb_pos->cb_list, &cmpl_list->mei_cb.cb_list);
- return -ENODEV;
- }
- list_move_tail(&cb_pos->cb_list, &dev->read_list.mei_cb.cb_list);
-
- return 0;
-}
-
-
-/**
- * _mei_irq_thread_ioctl - processes ioctl related operation.
- *
- * @dev: the device structure.
- * @slots: free slots.
- * @cb_pos: callback block.
- * @cl: private data of the file object.
- * @cmpl_list: complete list.
- *
- * returns 0, OK; otherwise, error.
- */
-static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots,
- struct mei_cl_cb *cb_pos,
- struct mei_cl *cl,
- struct mei_io_list *cmpl_list)
-{
- if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_connect_request))) {
- cl->state = MEI_FILE_CONNECTING;
- *slots -= (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_connect_request) + 3) / 4;
- if (mei_connect(dev, cl)) {
- cl->status = -ENODEV;
- cb_pos->information = 0;
- list_del(&cb_pos->cb_list);
- return -ENODEV;
- } else {
- list_move_tail(&cb_pos->cb_list,
- &dev->ctrl_rd_list.mei_cb.cb_list);
- cl->timer_count = MEI_CONNECT_TIMEOUT;
- }
- } else {
- /* return the cancel routine */
- list_del(&cb_pos->cb_list);
- return -EBADMSG;
- }
-
- return 0;
-}
-
-/**
- * _mei_irq_thread_cmpl - processes completed and no-iamthif operation.
- *
- * @dev: the device structure.
- * @slots: free slots.
- * @cb_pos: callback block.
- * @cl: private data of the file object.
- * @cmpl_list: complete list.
- *
- * returns 0, OK; otherwise, error.
- */
-static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots,
- struct mei_cl_cb *cb_pos,
- struct mei_cl *cl,
- struct mei_io_list *cmpl_list)
-{
- struct mei_msg_hdr *mei_hdr;
-
- if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
- (cb_pos->request_buffer.size -
- cb_pos->information))) {
- mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
- mei_hdr->host_addr = cl->host_client_id;
- mei_hdr->me_addr = cl->me_client_id;
- mei_hdr->length = cb_pos->request_buffer.size -
- cb_pos->information;
- mei_hdr->msg_complete = 1;
- mei_hdr->reserved = 0;
- dev_dbg(&dev->pdev->dev, "cb_pos->request_buffer.size =%d"
- "mei_hdr->msg_complete = %d\n",
- cb_pos->request_buffer.size,
- mei_hdr->msg_complete);
- dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n",
- cb_pos->information);
- dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
- mei_hdr->length);
- *slots -= (sizeof(struct mei_msg_hdr) +
- mei_hdr->length + 3) / 4;
- if (mei_write_message(dev, mei_hdr,
- (unsigned char *)
- (cb_pos->request_buffer.data +
- cb_pos->information),
- mei_hdr->length)) {
- cl->status = -ENODEV;
- list_move_tail(&cb_pos->cb_list,
- &cmpl_list->mei_cb.cb_list);
- return -ENODEV;
- } else {
- if (mei_flow_ctrl_reduce(dev, cl))
- return -ENODEV;
- cl->status = 0;
- cb_pos->information += mei_hdr->length;
- list_move_tail(&cb_pos->cb_list,
- &dev->write_waiting_list.mei_cb.cb_list);
- }
- } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
- /* buffer is still empty */
- mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
- mei_hdr->host_addr = cl->host_client_id;
- mei_hdr->me_addr = cl->me_client_id;
- mei_hdr->length =
- (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
- mei_hdr->msg_complete = 0;
- mei_hdr->reserved = 0;
-
- (*slots) -= (sizeof(struct mei_msg_hdr) +
- mei_hdr->length + 3) / 4;
- if (mei_write_message(dev, mei_hdr,
- (unsigned char *)
- (cb_pos->request_buffer.data +
- cb_pos->information),
- mei_hdr->length)) {
- cl->status = -ENODEV;
- list_move_tail(&cb_pos->cb_list,
- &cmpl_list->mei_cb.cb_list);
- return -ENODEV;
- } else {
- cb_pos->information += mei_hdr->length;
- dev_dbg(&dev->pdev->dev,
- "cb_pos->request_buffer.size =%d"
- " mei_hdr->msg_complete = %d\n",
- cb_pos->request_buffer.size,
- mei_hdr->msg_complete);
- dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n",
- cb_pos->information);
- dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
- mei_hdr->length);
- }
- return -EMSGSIZE;
- } else {
- return -EBADMSG;
- }
-
- return 0;
-}
-
-/**
- * _mei_irq_thread_cmpl_iamthif - processes completed iamthif operation.
- *
- * @dev: the device structure.
- * @slots: free slots.
- * @cb_pos: callback block.
- * @cl: private data of the file object.
- * @cmpl_list: complete list.
- *
- * returns 0, OK; otherwise, error.
- */
-static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots,
- struct mei_cl_cb *cb_pos,
- struct mei_cl *cl,
- struct mei_io_list *cmpl_list)
-{
- struct mei_msg_hdr *mei_hdr;
-
- if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
- dev->iamthif_msg_buf_size -
- dev->iamthif_msg_buf_index)) {
- mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
- mei_hdr->host_addr = cl->host_client_id;
- mei_hdr->me_addr = cl->me_client_id;
- mei_hdr->length = dev->iamthif_msg_buf_size -
- dev->iamthif_msg_buf_index;
- mei_hdr->msg_complete = 1;
- mei_hdr->reserved = 0;
-
- *slots -= (sizeof(struct mei_msg_hdr) +
- mei_hdr->length + 3) / 4;
-
- if (mei_write_message(dev, mei_hdr,
- (dev->iamthif_msg_buf +
- dev->iamthif_msg_buf_index),
- mei_hdr->length)) {
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- cl->status = -ENODEV;
- list_del(&cb_pos->cb_list);
- return -ENODEV;
- } else {
- if (mei_flow_ctrl_reduce(dev, cl))
- return -ENODEV;
- dev->iamthif_msg_buf_index += mei_hdr->length;
- cb_pos->information = dev->iamthif_msg_buf_index;
- cl->status = 0;
- dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
- dev->iamthif_flow_control_pending = true;
- /* save iamthif cb sent to amthi client */
- dev->iamthif_current_cb = cb_pos;
- list_move_tail(&cb_pos->cb_list,
- &dev->write_waiting_list.mei_cb.cb_list);
-
- }
- } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
- /* buffer is still empty */
- mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
- mei_hdr->host_addr = cl->host_client_id;
- mei_hdr->me_addr = cl->me_client_id;
- mei_hdr->length =
- (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
- mei_hdr->msg_complete = 0;
- mei_hdr->reserved = 0;
-
- *slots -= (sizeof(struct mei_msg_hdr) +
- mei_hdr->length + 3) / 4;
-
- if (mei_write_message(dev, mei_hdr,
- (dev->iamthif_msg_buf +
- dev->iamthif_msg_buf_index),
- mei_hdr->length)) {
- cl->status = -ENODEV;
- list_del(&cb_pos->cb_list);
- } else {
- dev->iamthif_msg_buf_index += mei_hdr->length;
- }
- return -EMSGSIZE;
- } else {
- return -EBADMSG;
- }
-
- return 0;
-}
-
-/**
- * mei_irq_thread_read_handler - bottom half read routine after ISR to
- * handle the read processing.
- *
- * @cmpl_list: An instance of our list structure
- * @dev: the device structure
- * @slots: slots to read.
- *
- * returns 0 on success, <0 on failure.
- */
-static int mei_irq_thread_read_handler(struct mei_io_list *cmpl_list,
- struct mei_device *dev,
- s32 *slots)
-{
- struct mei_msg_hdr *mei_hdr;
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
- int ret = 0;
-
- if (!dev->rd_msg_hdr) {
- dev->rd_msg_hdr = mei_mecbrw_read(dev);
- dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
- (*slots)--;
- dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
- }
- mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr;
- dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", mei_hdr->length);
-
- if (mei_hdr->reserved || !dev->rd_msg_hdr) {
- dev_dbg(&dev->pdev->dev, "corrupted message header.\n");
- ret = -EBADMSG;
- goto end;
- }
-
- if (mei_hdr->host_addr || mei_hdr->me_addr) {
- list_for_each_entry_safe(cl_pos, cl_next,
- &dev->file_list, link) {
- dev_dbg(&dev->pdev->dev,
- "list_for_each_entry_safe read host"
- " client = %d, ME client = %d\n",
- cl_pos->host_client_id,
- cl_pos->me_client_id);
- if (cl_pos->host_client_id == mei_hdr->host_addr &&
- cl_pos->me_client_id == mei_hdr->me_addr)
- break;
- }
-
- if (&cl_pos->link == &dev->file_list) {
- dev_dbg(&dev->pdev->dev, "corrupted message header\n");
- ret = -EBADMSG;
- goto end;
- }
- }
- if (((*slots) * sizeof(u32)) < mei_hdr->length) {
- dev_dbg(&dev->pdev->dev,
- "we can't read the message slots =%08x.\n",
- *slots);
- /* we can't read the message */
- ret = -ERANGE;
- goto end;
- }
-
- /* decide where to read the message too */
- if (!mei_hdr->host_addr) {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n");
- mei_irq_thread_read_bus_message(dev, mei_hdr);
- dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n");
- } else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
- (MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
- (dev->iamthif_state == MEI_IAMTHIF_READING)) {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
- dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
- mei_hdr->length);
- ret = mei_irq_thread_read_amthi_message(cmpl_list,
- dev, mei_hdr);
- if (ret)
- goto end;
-
- } else {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n");
- ret = mei_irq_thread_read_client_message(cmpl_list,
- dev, mei_hdr);
- if (ret)
- goto end;
-
- }
-
- /* reset the number of slots and header */
- *slots = mei_count_full_read_slots(dev);
- dev->rd_msg_hdr = 0;
-
- if (*slots == -EOVERFLOW) {
- /* overflow - reset */
- dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n");
- /* set the event since message has been read */
- ret = -ERANGE;
- goto end;
- }
-end:
- return ret;
-}
-
-
-/**
- * mei_irq_thread_write_handler - bottom half write routine after
- * ISR to handle the write processing.
- *
- * @cmpl_list: An instance of our list structure
- * @dev: the device structure
- * @slots: slots to write.
- *
- * returns 0 on success, <0 on failure.
- */
-static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
- struct mei_device *dev,
- s32 *slots)
-{
-
- struct mei_cl *cl;
- struct mei_cl_cb *pos = NULL, *next = NULL;
- struct mei_io_list *list;
- int ret;
-
- if (!mei_host_buffer_is_empty(dev)) {
- dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n");
- return 0;
- }
- *slots = mei_count_empty_write_slots(dev);
- /* complete all waiting for write CB */
- dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n");
-
- list = &dev->write_waiting_list;
- list_for_each_entry_safe(pos, next,
- &list->mei_cb.cb_list, cb_list) {
- cl = (struct mei_cl *)pos->file_private;
- if (cl == NULL)
- continue;
-
- cl->status = 0;
- list_del(&pos->cb_list);
- if (MEI_WRITING == cl->writing_state &&
- (pos->major_file_operations == MEI_WRITE) &&
- (cl != &dev->iamthif_cl)) {
- dev_dbg(&dev->pdev->dev,
- "MEI WRITE COMPLETE\n");
- cl->writing_state = MEI_WRITE_COMPLETE;
- list_add_tail(&pos->cb_list,
- &cmpl_list->mei_cb.cb_list);
- }
- if (cl == &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n");
- if (dev->iamthif_flow_control_pending) {
- ret = _mei_irq_thread_iamthif_read(
- dev, slots);
- if (ret)
- return ret;
- }
- }
- }
-
- if (dev->stop && !dev->wd_pending) {
- dev->wd_stopped = true;
- wake_up_interruptible(&dev->wait_stop_wd);
- return 0;
- }
-
- if (dev->extra_write_index) {
- dev_dbg(&dev->pdev->dev, "extra_write_index =%d.\n",
- dev->extra_write_index);
- mei_write_message(dev,
- (struct mei_msg_hdr *) &dev->ext_msg_buf[0],
- (unsigned char *) &dev->ext_msg_buf[1],
- (dev->extra_write_index - 1) * sizeof(u32));
- *slots -= dev->extra_write_index;
- dev->extra_write_index = 0;
- }
- if (dev->mei_state == MEI_ENABLED) {
- if (dev->wd_pending &&
- mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
- if (mei_wd_send(dev))
- dev_dbg(&dev->pdev->dev, "wd send failed.\n");
- else
- if (mei_flow_ctrl_reduce(dev, &dev->wd_cl))
- return -ENODEV;
-
- dev->wd_pending = false;
-
- if (dev->wd_timeout) {
- *slots -= (sizeof(struct mei_msg_hdr) +
- MEI_START_WD_DATA_SIZE + 3) / 4;
- dev->wd_due_counter = 2;
- } else {
- *slots -= (sizeof(struct mei_msg_hdr) +
- MEI_WD_PARAMS_SIZE + 3) / 4;
- dev->wd_due_counter = 0;
- }
-
- }
- }
- if (dev->stop)
- return -ENODEV;
-
- /* complete control write list CB */
- dev_dbg(&dev->pdev->dev, "complete control write list cb.\n");
- list_for_each_entry_safe(pos, next,
- &dev->ctrl_wr_list.mei_cb.cb_list, cb_list) {
- cl = (struct mei_cl *) pos->file_private;
- if (!cl) {
- list_del(&pos->cb_list);
- return -ENODEV;
- }
- switch (pos->major_file_operations) {
- case MEI_CLOSE:
- /* send disconnect message */
- ret = _mei_irq_thread_close(dev, slots, pos, cl, cmpl_list);
- if (ret)
- return ret;
-
- break;
- case MEI_READ:
- /* send flow control message */
- ret = _mei_irq_thread_read(dev, slots, pos, cl, cmpl_list);
- if (ret)
- return ret;
-
- break;
- case MEI_IOCTL:
- /* connect message */
- if (mei_other_client_is_connecting(dev, cl))
- continue;
- ret = _mei_irq_thread_ioctl(dev, slots, pos, cl, cmpl_list);
- if (ret)
- return ret;
-
- break;
-
- default:
- BUG();
- }
-
- }
- /* complete write list CB */
- dev_dbg(&dev->pdev->dev, "complete write list cb.\n");
- list_for_each_entry_safe(pos, next,
- &dev->write_list.mei_cb.cb_list, cb_list) {
- cl = (struct mei_cl *)pos->file_private;
- if (cl == NULL)
- continue;
-
- if (cl != &dev->iamthif_cl) {
- if (!mei_flow_ctrl_creds(dev, cl)) {
- dev_dbg(&dev->pdev->dev,
- "No flow control"
- " credentials for client"
- " %d, not sending.\n",
- cl->host_client_id);
- continue;
- }
- ret = _mei_irq_thread_cmpl(dev, slots,
- pos,
- cl, cmpl_list);
- if (ret)
- return ret;
-
- } else if (cl == &dev->iamthif_cl) {
- /* IAMTHIF IOCTL */
- dev_dbg(&dev->pdev->dev, "complete amthi write cb.\n");
- if (!mei_flow_ctrl_creds(dev, cl)) {
- dev_dbg(&dev->pdev->dev,
- "No flow control"
- " credentials for amthi"
- " client %d.\n",
- cl->host_client_id);
- continue;
- }
- ret = _mei_irq_thread_cmpl_iamthif(dev,
- slots,
- pos,
- cl,
- cmpl_list);
- if (ret)
- return ret;
-
- }
-
- }
- return 0;
-}
-
-
-
-/**
- * mei_timer - timer function.
- *
- * @work: pointer to the work_struct structure
- *
- * NOTE: This function is called by timer interrupt work
- */
-void mei_timer(struct work_struct *work)
-{
- unsigned long timeout;
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
- struct list_head *amthi_complete_list = NULL;
- struct mei_cl_cb *cb_pos = NULL;
- struct mei_cl_cb *cb_next = NULL;
-
- struct mei_device *dev = container_of(work,
- struct mei_device, timer_work.work);
-
-
- mutex_lock(&dev->device_lock);
- if (dev->mei_state != MEI_ENABLED) {
- if (dev->mei_state == MEI_INIT_CLIENTS) {
- if (dev->init_clients_timer) {
- if (--dev->init_clients_timer == 0) {
- dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n",
- dev->init_clients_state);
- mei_reset(dev, 1);
- }
- }
- }
- goto out;
- }
- /*** connect/disconnect timeouts ***/
- list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
- if (cl_pos->timer_count) {
- if (--cl_pos->timer_count == 0) {
- dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n");
- mei_reset(dev, 1);
- goto out;
- }
- }
- }
-
- if (dev->iamthif_stall_timer) {
- if (--dev->iamthif_stall_timer == 0) {
- dev_dbg(&dev->pdev->dev, "resetting because of hang to amthi.\n");
- mei_reset(dev, 1);
- dev->iamthif_msg_buf_size = 0;
- dev->iamthif_msg_buf_index = 0;
- dev->iamthif_canceled = false;
- dev->iamthif_ioctl = true;
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- dev->iamthif_timer = 0;
-
- if (dev->iamthif_current_cb)
- mei_free_cb_private(dev->iamthif_current_cb);
-
- dev->iamthif_file_object = NULL;
- dev->iamthif_current_cb = NULL;
- mei_run_next_iamthif_cmd(dev);
- }
- }
-
- if (dev->iamthif_timer) {
-
- timeout = dev->iamthif_timer +
- msecs_to_jiffies(IAMTHIF_READ_TIMER);
-
- dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
- dev->iamthif_timer);
- dev_dbg(&dev->pdev->dev, "timeout = %ld\n", timeout);
- dev_dbg(&dev->pdev->dev, "jiffies = %ld\n", jiffies);
- if (time_after(jiffies, timeout)) {
- /*
- * User didn't read the AMTHI data on time (15sec)
- * freeing AMTHI for other requests
- */
-
- dev_dbg(&dev->pdev->dev, "freeing AMTHI for other requests\n");
-
- amthi_complete_list = &dev->amthi_read_complete_list.
- mei_cb.cb_list;
-
- list_for_each_entry_safe(cb_pos, cb_next, amthi_complete_list, cb_list) {
-
- cl_pos = cb_pos->file_object->private_data;
-
- /* Finding the AMTHI entry. */
- if (cl_pos == &dev->iamthif_cl)
- list_del(&cb_pos->cb_list);
- }
- if (dev->iamthif_current_cb)
- mei_free_cb_private(dev->iamthif_current_cb);
-
- dev->iamthif_file_object->private_data = NULL;
- dev->iamthif_file_object = NULL;
- dev->iamthif_current_cb = NULL;
- dev->iamthif_timer = 0;
- mei_run_next_iamthif_cmd(dev);
-
- }
- }
-out:
- schedule_delayed_work(&dev->timer_work, 2 * HZ);
- mutex_unlock(&dev->device_lock);
-}
-
-/**
- * mei_interrupt_thread_handler - function called after ISR to handle the interrupt
- * processing.
- *
- * @irq: The irq number
- * @dev_id: pointer to the device structure
- *
- * returns irqreturn_t
- *
- */
-irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id)
-{
- struct mei_device *dev = (struct mei_device *) dev_id;
- struct mei_io_list complete_list;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
- struct mei_cl *cl;
- s32 slots;
- int rets;
- bool bus_message_received;
-
-
- dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n");
- /* initialize our complete list */
- mutex_lock(&dev->device_lock);
- mei_io_list_init(&complete_list);
- dev->host_hw_state = mei_hcsr_read(dev);
-
- /* Ack the interrupt here
- * In case of MSI we don't go through the quick handler */
- if (pci_dev_msi_enabled(dev->pdev))
- mei_reg_write(dev, H_CSR, dev->host_hw_state);
-
- dev->me_hw_state = mei_mecsr_read(dev);
-
- /* check if ME wants a reset */
- if ((dev->me_hw_state & ME_RDY_HRA) == 0 &&
- dev->mei_state != MEI_RESETING &&
- dev->mei_state != MEI_INITIALIZING) {
- dev_dbg(&dev->pdev->dev, "FW not ready.\n");
- mei_reset(dev, 1);
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
- }
-
- /* check if we need to start the dev */
- if ((dev->host_hw_state & H_RDY) == 0) {
- if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
- dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
- dev->host_hw_state |= (H_IE | H_IG | H_RDY);
- mei_hcsr_set(dev);
- dev->mei_state = MEI_INIT_CLIENTS;
- dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
- /* link is established
- * start sending messages.
- */
- mei_host_start_message(dev);
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
- } else {
- dev_dbg(&dev->pdev->dev, "FW not ready.\n");
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
- }
- }
- /* check slots available for reading */
- slots = mei_count_full_read_slots(dev);
- dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n",
- slots, dev->extra_write_index);
- while (slots > 0 && !dev->extra_write_index) {
- dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n",
- slots, dev->extra_write_index);
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_handler.\n");
- rets = mei_irq_thread_read_handler(&complete_list, dev, &slots);
- if (rets)
- goto end;
- }
- rets = mei_irq_thread_write_handler(&complete_list, dev, &slots);
-end:
- dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
- dev->host_hw_state = mei_hcsr_read(dev);
- dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev);
-
- bus_message_received = false;
- if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
- dev_dbg(&dev->pdev->dev, "received waiting bus message\n");
- bus_message_received = true;
- }
- mutex_unlock(&dev->device_lock);
- if (bus_message_received) {
- dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n");
- wake_up_interruptible(&dev->wait_recvd_msg);
- bus_message_received = false;
- }
- if (list_empty(&complete_list.mei_cb.cb_list))
- return IRQ_HANDLED;
-
-
- list_for_each_entry_safe(cb_pos, cb_next,
- &complete_list.mei_cb.cb_list, cb_list) {
- cl = (struct mei_cl *)cb_pos->file_private;
- list_del(&cb_pos->cb_list);
- if (cl) {
- if (cl != &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "completing call back.\n");
- _mei_cmpl(cl, cb_pos);
- cb_pos = NULL;
- } else if (cl == &dev->iamthif_cl) {
- _mei_cmpl_iamthif(dev, cb_pos);
- }
- }
- }
- return IRQ_HANDLED;
-}
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