diff options
Diffstat (limited to 'drivers/staging/mei/interrupt.c')
| -rw-r--r-- | drivers/staging/mei/interrupt.c | 1600 |
1 files changed, 0 insertions, 1600 deletions
diff --git a/drivers/staging/mei/interrupt.c b/drivers/staging/mei/interrupt.c deleted file mode 100644 index 3544fee34e4..00000000000 --- a/drivers/staging/mei/interrupt.c +++ /dev/null @@ -1,1600 +0,0 @@ -/* - * - * Intel Management Engine Interface (Intel MEI) Linux driver - * Copyright (c) 2003-2011, 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 = (unsigned char *) (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 = (unsigned char *) - (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, (unsigned char *) 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))) { - *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"); - } else { - 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; - } else { - return -EMSGSIZE; - } -} - -/** - * _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; - *(u8 *) (&disconnect_res->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; - - unsigned char *buffer; - - /* read the message to our buffer */ - buffer = (unsigned char *) dev->rd_msg_buf; - BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf)); - mei_read_slots(dev, buffer, mei_hdr->length); - mei_msg = (struct mei_bus_message *) buffer; - - switch (*(u8 *) mei_msg) { - 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->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->cmd.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 Propeties 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->cmd.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))) { - *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; - } else { - list_move_tail(&cb_pos->cb_list, - &dev->read_list.mei_cb.cb_list); - } - } else { - /* return the cancel routine */ - list_del(&cb_pos->cb_list); - return -EBADMSG; - } - - 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, "reseting 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 throuhg 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 avalable 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; -} |