diff options
Diffstat (limited to 'drivers/staging/heci/heci_init.c')
| -rw-r--r-- | drivers/staging/heci/heci_init.c | 1077 |
1 files changed, 1077 insertions, 0 deletions
diff --git a/drivers/staging/heci/heci_init.c b/drivers/staging/heci/heci_init.c new file mode 100644 index 000000000000..a8a0da910cfb --- /dev/null +++ b/drivers/staging/heci/heci_init.c @@ -0,0 +1,1077 @@ +/* + * Part of Intel(R) Manageability Engine Interface Linux driver + * + * Copyright (c) 2003 - 2008 Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + * + */ + +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/reboot.h> +#include <linux/poll.h> +#include <linux/init.h> +#include <linux/kdev_t.h> +#include <linux/moduleparam.h> +#include <linux/wait.h> +#include <linux/delay.h> +#include <linux/kthread.h> + +#include "heci_data_structures.h" +#include "heci_interface.h" +#include "heci.h" + + +const __u8 heci_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 }; +const __u8 heci_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 }; + +const __u8 heci_wd_state_independence_msg[3][4] = { + {0x05, 0x02, 0x51, 0x10}, + {0x05, 0x02, 0x52, 0x10}, + {0x07, 0x02, 0x01, 0x10} +}; + +static const struct guid heci_asf_guid = { + 0x75B30CD6, 0xA29E, 0x4AF7, + {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6} +}; +const struct guid heci_wd_guid = { + 0x05B79A6F, 0x4628, 0x4D7F, + {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB} +}; +const struct guid heci_pthi_guid = { + 0x12f80028, 0xb4b7, 0x4b2d, + {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c} +}; + + +/* + * heci init function prototypes + */ +static void heci_check_asf_mode(struct iamt_heci_device *dev); +static int host_start_message(struct iamt_heci_device *dev); +static int host_enum_clients_message(struct iamt_heci_device *dev); +static int allocate_me_clients_storage(struct iamt_heci_device *dev); +static void host_init_wd(struct iamt_heci_device *dev); +static void host_init_iamthif(struct iamt_heci_device *dev); +static int heci_wait_event_int_timeout(struct iamt_heci_device *dev, + long timeout); + + +/** + * heci_initialize_list - Sets up a queue list. + * + * @list: An instance of our list structure + * @dev: Device object for our driver + */ +void heci_initialize_list(struct io_heci_list *list, + struct iamt_heci_device *dev) +{ + /* initialize our queue list */ + INIT_LIST_HEAD(&list->heci_cb.cb_list); + list->status = 0; + list->device_extension = dev; +} + +/** + * heci_flush_queues - flush our queues list belong to file_ext. + * + * @dev: Device object for our driver + * @file_ext: private data of the file object + */ +void heci_flush_queues(struct iamt_heci_device *dev, + struct heci_file_private *file_ext) +{ + int i; + + if (!dev || !file_ext) + return; + + /* flush our queue list belong to file_ext */ + for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) { + DBG("remove list entry belong to file_ext\n"); + heci_flush_list(dev->io_list_array[i], file_ext); + } +} + + +/** + * heci_flush_list - remove list entry belong to file_ext. + * + * @list: An instance of our list structure + * @file_ext: private data of the file object + */ +void heci_flush_list(struct io_heci_list *list, + struct heci_file_private *file_ext) +{ + struct heci_file_private *file_ext_tmp; + struct heci_cb_private *priv_cb_pos = NULL; + struct heci_cb_private *priv_cb_next = NULL; + + if (!list || !file_ext) + return; + + if (list->status != 0) + return; + + if (list_empty(&list->heci_cb.cb_list)) + return; + + list_for_each_entry_safe(priv_cb_pos, priv_cb_next, + &list->heci_cb.cb_list, cb_list) { + if (priv_cb_pos) { + file_ext_tmp = (struct heci_file_private *) + priv_cb_pos->file_private; + if (file_ext_tmp) { + if (heci_fe_same_id(file_ext, file_ext_tmp)) + list_del(&priv_cb_pos->cb_list); + } + } + } +} + +/** + * heci_reset_iamthif_params - initializes heci device iamthif + * + * @dev: The heci device structure + */ +static void heci_reset_iamthif_params(struct iamt_heci_device *dev) +{ + /* reset iamthif parameters. */ + dev->iamthif_current_cb = NULL; + dev->iamthif_msg_buf_size = 0; + dev->iamthif_msg_buf_index = 0; + dev->iamthif_canceled = 0; + dev->iamthif_file_ext.file = NULL; + dev->iamthif_ioctl = 0; + dev->iamthif_state = HECI_IAMTHIF_IDLE; + dev->iamthif_timer = 0; +} + +/** + * init_heci_device - allocates and initializes the heci device structure + * + * @pdev: The pci device structure + * + * returns The heci_device_device pointer on success, NULL on failure. + */ +struct iamt_heci_device *init_heci_device(struct pci_dev *pdev) +{ + int i; + struct iamt_heci_device *dev; + + dev = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL); + if (!dev) + return NULL; + + /* setup our list array */ + dev->io_list_array[0] = &dev->read_list; + dev->io_list_array[1] = &dev->write_list; + dev->io_list_array[2] = &dev->write_waiting_list; + dev->io_list_array[3] = &dev->ctrl_wr_list; + dev->io_list_array[4] = &dev->ctrl_rd_list; + dev->io_list_array[5] = &dev->pthi_cmd_list; + dev->io_list_array[6] = &dev->pthi_read_complete_list; + INIT_LIST_HEAD(&dev->file_list); + INIT_LIST_HEAD(&dev->wd_file_ext.link); + INIT_LIST_HEAD(&dev->iamthif_file_ext.link); + spin_lock_init(&dev->device_lock); + init_waitqueue_head(&dev->wait_recvd_msg); + init_waitqueue_head(&dev->wait_stop_wd); + dev->heci_state = HECI_INITIALIZING; + dev->iamthif_state = HECI_IAMTHIF_IDLE; + + /* init work for schedule work */ + INIT_WORK(&dev->work, NULL); + for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) + heci_initialize_list(dev->io_list_array[i], dev); + dev->pdev = pdev; + return dev; +} + + + + +static int heci_wait_event_int_timeout(struct iamt_heci_device *dev, + long timeout) +{ + return wait_event_interruptible_timeout(dev->wait_recvd_msg, + (dev->recvd_msg), timeout); +} + +/** + * heci_hw_init - init host and fw to start work. + * + * @dev: Device object for our driver + * + * returns 0 on success, <0 on failure. + */ +int heci_hw_init(struct iamt_heci_device *dev) +{ + int err = 0; + + dev->host_hw_state = read_heci_register(dev, H_CSR); + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA); + DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n", + dev->host_hw_state, dev->me_hw_state); + + if ((dev->host_hw_state & H_IS) == H_IS) { + /* acknowledge interrupt and stop interupts */ + heci_set_csr_register(dev); + } + dev->recvd_msg = 0; + DBG("reset in start the heci device.\n"); + + heci_reset(dev, 1); + + DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", + dev->host_hw_state, dev->me_hw_state); + + /* wait for ME to turn on ME_RDY */ + if (!dev->recvd_msg) + err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT); + + if (!err && !dev->recvd_msg) { + dev->heci_state = HECI_DISABLED; + DBG("wait_event_interruptible_timeout failed" + "on wait for ME to turn on ME_RDY.\n"); + return -ENODEV; + } else { + if (!(((dev->host_hw_state & H_RDY) == H_RDY) + && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) { + dev->heci_state = HECI_DISABLED; + DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", + dev->host_hw_state, + dev->me_hw_state); + + if (!(dev->host_hw_state & H_RDY) != H_RDY) + DBG("host turn off H_RDY.\n"); + + if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA) + DBG("ME turn off ME_RDY.\n"); + + printk(KERN_ERR + "heci: link layer initialization failed.\n"); + return -ENODEV; + } + } + dev->recvd_msg = 0; + DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", + dev->host_hw_state, dev->me_hw_state); + DBG("ME turn on ME_RDY and host turn on H_RDY.\n"); + printk(KERN_INFO "heci: link layer has been established.\n"); + return 0; +} + +/** + * heci_hw_reset - reset fw via heci csr register. + * + * @dev: Device object for our driver + * @interrupts: if interrupt should be enable after reset. + */ +static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts) +{ + dev->host_hw_state |= (H_RST | H_IG); + + if (interrupts) + heci_csr_enable_interrupts(dev); + else + heci_csr_disable_interrupts(dev); + + BUG_ON((dev->host_hw_state & H_RST) != H_RST); + BUG_ON((dev->host_hw_state & H_RDY) != 0); +} + +/** + * heci_reset - reset host and fw. + * + * @dev: Device object for our driver + * @interrupts: if interrupt should be enable after reset. + */ +void heci_reset(struct iamt_heci_device *dev, int interrupts) +{ + struct heci_file_private *file_pos = NULL; + struct heci_file_private *file_next = NULL; + struct heci_cb_private *priv_cb_pos = NULL; + struct heci_cb_private *priv_cb_next = NULL; + int unexpected = 0; + + if (dev->heci_state == HECI_RECOVERING_FROM_RESET) { + dev->need_reset = 1; + return; + } + + if (dev->heci_state != HECI_INITIALIZING && + dev->heci_state != HECI_DISABLED && + dev->heci_state != HECI_POWER_DOWN && + dev->heci_state != HECI_POWER_UP) + unexpected = 1; + + if (dev->reinit_tsk != NULL) { + kthread_stop(dev->reinit_tsk); + dev->reinit_tsk = NULL; + } + + dev->host_hw_state = read_heci_register(dev, H_CSR); + + DBG("before reset host_hw_state = 0x%08x.\n", + dev->host_hw_state); + + heci_hw_reset(dev, interrupts); + + dev->host_hw_state &= ~H_RST; + dev->host_hw_state |= H_IG; + + write_heci_register(dev, H_CSR, dev->host_hw_state); + + DBG("currently saved host_hw_state = 0x%08x.\n", + dev->host_hw_state); + + dev->need_reset = 0; + + if (dev->heci_state != HECI_INITIALIZING) { + if ((dev->heci_state != HECI_DISABLED) && + (dev->heci_state != HECI_POWER_DOWN)) + dev->heci_state = HECI_RESETING; + + list_for_each_entry_safe(file_pos, + file_next, &dev->file_list, link) { + file_pos->state = HECI_FILE_DISCONNECTED; + file_pos->flow_ctrl_creds = 0; + file_pos->read_cb = NULL; + file_pos->timer_count = 0; + } + /* remove entry if already in list */ + DBG("list del iamthif and wd file list.\n"); + heci_remove_client_from_file_list(dev, + dev->wd_file_ext.host_client_id); + + heci_remove_client_from_file_list(dev, + dev->iamthif_file_ext.host_client_id); + + heci_reset_iamthif_params(dev); + dev->wd_due_counter = 0; + dev->extra_write_index = 0; + } + + dev->num_heci_me_clients = 0; + dev->rd_msg_hdr = 0; + dev->stop = 0; + dev->wd_pending = 0; + + /* update the state of the registers after reset */ + dev->host_hw_state = read_heci_register(dev, H_CSR); + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA); + + DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", + dev->host_hw_state, dev->me_hw_state); + + if (unexpected) + printk(KERN_WARNING "heci: unexpected reset.\n"); + + /* Wake up all readings so they can be interrupted */ + list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) { + if (&file_pos->rx_wait && + waitqueue_active(&file_pos->rx_wait)) { + printk(KERN_INFO "heci: Waking up client!\n"); + wake_up_interruptible(&file_pos->rx_wait); + } + } + /* remove all waiting requests */ + if (dev->write_list.status == 0 && + !list_empty(&dev->write_list.heci_cb.cb_list)) { + list_for_each_entry_safe(priv_cb_pos, priv_cb_next, + &dev->write_list.heci_cb.cb_list, cb_list) { + if (priv_cb_pos) { + list_del(&priv_cb_pos->cb_list); + heci_free_cb_private(priv_cb_pos); + } + } + } +} + +/** + * heci_initialize_clients - heci communication initialization. + * + * @dev: Device object for our driver + */ +int heci_initialize_clients(struct iamt_heci_device *dev) +{ + int status; + + msleep(100); /* FW needs time to be ready to talk with us */ + DBG("link is established start sending messages.\n"); + /* link is established start sending messages. */ + status = host_start_message(dev); + if (status != 0) { + spin_lock_bh(&dev->device_lock); + dev->heci_state = HECI_DISABLED; + spin_unlock_bh(&dev->device_lock); + DBG("start sending messages failed.\n"); + return status; + } + + /* enumerate clients */ + status = host_enum_clients_message(dev); + if (status != 0) { + spin_lock_bh(&dev->device_lock); + dev->heci_state = HECI_DISABLED; + spin_unlock_bh(&dev->device_lock); + DBG("enum clients failed.\n"); + return status; + } + /* allocate storage for ME clients representation */ + status = allocate_me_clients_storage(dev); + if (status != 0) { + spin_lock_bh(&dev->device_lock); + dev->num_heci_me_clients = 0; + dev->heci_state = HECI_DISABLED; + spin_unlock_bh(&dev->device_lock); + DBG("allocate clients failed.\n"); + return status; + } + + heci_check_asf_mode(dev); + /*heci initialization wd */ + host_init_wd(dev); + /*heci initialization iamthif client */ + host_init_iamthif(dev); + + spin_lock_bh(&dev->device_lock); + if (dev->need_reset) { + dev->need_reset = 0; + dev->heci_state = HECI_DISABLED; + spin_unlock_bh(&dev->device_lock); + return -ENODEV; + } + + memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients)); + dev->open_handle_count = 0; + dev->heci_host_clients[0] |= 7; + dev->current_host_client_id = 3; + dev->heci_state = HECI_ENABLED; + spin_unlock_bh(&dev->device_lock); + DBG("initialization heci clients successful.\n"); + return 0; +} + +/** + * heci_task_initialize_clients - heci reinitialization task + * + * @data: Device object for our driver + */ +int heci_task_initialize_clients(void *data) +{ + int ret; + struct iamt_heci_device *dev = (struct iamt_heci_device *) data; + + spin_lock_bh(&dev->device_lock); + if (dev->reinit_tsk != NULL) { + spin_unlock_bh(&dev->device_lock); + DBG("reinit task already started.\n"); + return 0; + } + dev->reinit_tsk = current; + current->flags |= PF_NOFREEZE; + spin_unlock_bh(&dev->device_lock); + + ret = heci_initialize_clients(dev); + + spin_lock_bh(&dev->device_lock); + dev->reinit_tsk = NULL; + spin_unlock_bh(&dev->device_lock); + + return ret; +} + +/** + * host_start_message - heci host send start message. + * + * @dev: Device object for our driver + * + * returns 0 on success, <0 on failure. + */ +static int host_start_message(struct iamt_heci_device *dev) +{ + long timeout = 60; /* 60 second */ + + struct heci_msg_hdr *heci_hdr; + struct hbm_host_version_request *host_start_req; + struct hbm_host_stop_request *host_stop_req; + int err = 0; + + /* host start message */ + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0]; + heci_hdr->host_addr = 0; + heci_hdr->me_addr = 0; + heci_hdr->length = sizeof(struct hbm_host_version_request); + heci_hdr->msg_complete = 1; + heci_hdr->reserved = 0; + + host_start_req = + (struct hbm_host_version_request *) &dev->wr_msg_buf[1]; + memset(host_start_req, 0, sizeof(struct hbm_host_version_request)); + host_start_req->cmd.cmd = HOST_START_REQ_CMD; + host_start_req->host_version.major_version = HBM_MAJOR_VERSION; + host_start_req->host_version.minor_version = HBM_MINOR_VERSION; + dev->recvd_msg = 0; + if (!heci_write_message(dev, heci_hdr, + (unsigned char *) (host_start_req), + heci_hdr->length)) { + DBG("send version to fw fail.\n"); + return -ENODEV; + } + DBG("call wait_event_interruptible_timeout for response message.\n"); + /* wait for response */ + err = heci_wait_event_int_timeout(dev, timeout * HZ); + if (!err && !dev->recvd_msg) { + DBG("wait_timeout failed on host start response message.\n"); + return -ENODEV; + } + dev->recvd_msg = 0; + DBG("wait_timeout successful on host start response message.\n"); + if ((dev->version.major_version != HBM_MAJOR_VERSION) || + (dev->version.minor_version != HBM_MINOR_VERSION)) { + /* send stop message */ + heci_hdr->host_addr = 0; + heci_hdr->me_addr = 0; + heci_hdr->length = sizeof(struct hbm_host_stop_request); + heci_hdr->msg_complete = 1; + heci_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; + heci_write_message(dev, heci_hdr, + (unsigned char *) (host_stop_req), + heci_hdr->length); + DBG("version mismatch.\n"); + return -ENODEV; + } + + return 0; +} + +/** + * host_enum_clients_message - host send enumeration client request message. + * + * @dev: Device object for our driver + * + * returns 0 on success, <0 on failure. + */ +static int host_enum_clients_message(struct iamt_heci_device *dev) +{ + long timeout = 5; /*5 second */ + struct heci_msg_hdr *heci_hdr; + struct hbm_host_enum_request *host_enum_req; + int err = 0; + int i, j; + + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0]; + /* enumerate clients */ + heci_hdr->host_addr = 0; + heci_hdr->me_addr = 0; + heci_hdr->length = sizeof(struct hbm_host_enum_request); + heci_hdr->msg_complete = 1; + heci_hdr->reserved = 0; + + host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1]; + memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request)); + host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD; + if (!heci_write_message(dev, heci_hdr, + (unsigned char *) (host_enum_req), + heci_hdr->length)) { + DBG("send enumeration request failed.\n"); + return -ENODEV; + } + /* wait for response */ + dev->recvd_msg = 0; + err = heci_wait_event_int_timeout(dev, timeout * HZ); + if (!err && !dev->recvd_msg) { + DBG("wait_event_interruptible_timeout failed " + "on enumeration clients response message.\n"); + return -ENODEV; + } + dev->recvd_msg = 0; + + spin_lock_bh(&dev->device_lock); + /* count how many ME clients we have */ + for (i = 0; i < sizeof(dev->heci_me_clients); i++) { + for (j = 0; j < 8; j++) { + if ((dev->heci_me_clients[i] & (1 << j)) != 0) + dev->num_heci_me_clients++; + + } + } + spin_unlock_bh(&dev->device_lock); + + return 0; +} + +/** + * host_client_properties - reads properties for client + * + * @dev: Device object for our driver + * @idx: client index in me client array + * @client_id: id of the client + * + * returns 0 on success, <0 on failure. + */ +static int host_client_properties(struct iamt_heci_device *dev, + struct heci_me_client *client) +{ + struct heci_msg_hdr *heci_hdr; + struct hbm_props_request *host_cli_req; + int err; + + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0]; + heci_hdr->host_addr = 0; + heci_hdr->me_addr = 0; + heci_hdr->length = sizeof(struct hbm_props_request); + heci_hdr->msg_complete = 1; + heci_hdr->reserved = 0; + + host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1]; + memset(host_cli_req, 0, sizeof(struct hbm_props_request)); + host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD; + host_cli_req->address = client->client_id; + if (!heci_write_message(dev, heci_hdr, + (unsigned char *) (host_cli_req), + heci_hdr->length)) { + DBG("send props request failed.\n"); + return -ENODEV; + } + /* wait for response */ + dev->recvd_msg = 0; + err = heci_wait_event_int_timeout(dev, 10 * HZ); + if (!err && !dev->recvd_msg) { + DBG("wait failed on props resp msg.\n"); + return -ENODEV; + } + dev->recvd_msg = 0; + return 0; +} + +/** + * allocate_me_clients_storage - allocate storage for me clients + * + * @dev: Device object for our driver + * + * returns 0 on success, <0 on failure. + */ +static int allocate_me_clients_storage(struct iamt_heci_device *dev) +{ + struct heci_me_client *clients; + struct heci_me_client *client; + __u8 num, i, j; + int err; + + if (dev->num_heci_me_clients <= 0) + return 0; + + spin_lock_bh(&dev->device_lock); + kfree(dev->me_clients); + dev->me_clients = NULL; + spin_unlock_bh(&dev->device_lock); + + /* allocate storage for ME clients representation */ + clients = kcalloc(dev->num_heci_me_clients, + sizeof(struct heci_me_client), GFP_KERNEL); + if (!clients) { + DBG("memory allocation for ME clients failed.\n"); + return -ENOMEM; + } + + spin_lock_bh(&dev->device_lock); + dev->me_clients = clients; + spin_unlock_bh(&dev->device_lock); + + num = 0; + for (i = 0; i < sizeof(dev->heci_me_clients); i++) { + for (j = 0; j < 8; j++) { + if ((dev->heci_me_clients[i] & (1 << j)) != 0) { + client = &dev->me_clients[num]; + client->client_id = (i * 8) + j; + client->flow_ctrl_creds = 0; + err = host_client_properties(dev, client); + if (err != 0) { + spin_lock_bh(&dev->device_lock); + kfree(dev->me_clients); + dev->me_clients = NULL; + spin_unlock_bh(&dev->device_lock); + return err; + } + num++; + } + } + } + + return 0; +} + +/** + * heci_init_file_private - initializes private file structure. + * + * @priv: private file structure to be initialized + * @file: the file structure + */ +static void heci_init_file_private(struct heci_file_private *priv, + struct file *file) +{ + memset(priv, 0, sizeof(struct heci_file_private)); + spin_lock_init(&priv->file_lock); + spin_lock_init(&priv->read_io_lock); + spin_lock_init(&priv->write_io_lock); + init_waitqueue_head(&priv->wait); + init_waitqueue_head(&priv->rx_wait); + DBG("priv->rx_wait =%p\n", &priv->rx_wait); + init_waitqueue_head(&priv->tx_wait); + INIT_LIST_HEAD(&priv->link); + priv->reading_state = HECI_IDLE; + priv->writing_state = HECI_IDLE; +} + +/** + * heci_find_me_client - search for ME client guid + * sets client_id in heci_file_private if found + * @dev: Device object for our driver + * @priv: private file structure to set client_id in + * @cguid: searched guid of ME client + * @client_id: id of host client to be set in file private structure + * + * returns ME client index + */ +static __u8 heci_find_me_client(struct iamt_heci_device *dev, + struct heci_file_private *priv, + const struct guid *cguid, __u8 client_id) +{ + __u8 i; + + if ((dev == NULL) || (priv == NULL) || (cguid == NULL)) + return 0; + + for (i = 0; i < dev->num_heci_me_clients; i++) { + if (memcmp(cguid, + &dev->me_clients[i].props.protocol_name, + sizeof(struct guid)) == 0) { + priv->me_client_id = dev->me_clients[i].client_id; + priv->state = HECI_FILE_CONNECTING; + priv->host_client_id = client_id; + + list_add_tail(&priv->link, &dev->file_list); + return i; + } + } + return 0; +} + +/** + * heci_check_asf_mode - check for ASF client + * + * @dev: Device object for our driver + */ +static void heci_check_asf_mode(struct iamt_heci_device *dev) +{ + __u8 i; + + spin_lock_bh(&dev->device_lock); + dev->asf_mode = 0; + /* find ME ASF client - otherwise assume AMT mode */ + DBG("find ME ASF client - otherwise assume AMT mode.\n"); + for (i = 0; i < dev->num_heci_me_clients; i++) { + if (memcmp(&heci_asf_guid, + &dev->me_clients[i].props.protocol_name, + sizeof(struct guid)) == 0) { + dev->asf_mode = 1; + spin_unlock_bh(&dev->device_lock); + DBG("found ME ASF client.\n"); + return; + } + } + spin_unlock_bh(&dev->device_lock); + DBG("assume AMT mode.\n"); +} + +/** + * heci_connect_me_client - connect ME client + * @dev: Device object for our driver + * @priv: private file structure + * @timeout: connect timeout in seconds + * + * returns 1 - if connected, 0 - if not + */ +static __u8 heci_connect_me_client(struct iamt_heci_device *dev, + struct heci_file_private *priv, + long timeout) +{ + int err = 0; + + if ((dev == NULL) || (priv == NULL)) + return 0; + + if (!heci_connect(dev, priv)) { + DBG("failed to call heci_connect for client_id=%d.\n", + priv->host_client_id); + spin_lock_bh(&dev->device_lock); + heci_remove_client_from_file_list(dev, priv->host_client_id); + priv->state = HECI_FILE_DISCONNECTED; + spin_unlock_bh(&dev->device_lock); + return 0; + } + + err = wait_event_timeout(dev->wait_recvd_msg, + (HECI_FILE_CONNECTED == priv->state || + HECI_FILE_DISCONNECTED == priv->state), + timeout * HZ); + if (HECI_FILE_CONNECTED != priv->state) { + spin_lock_bh(&dev->device_lock); + heci_remove_client_from_file_list(dev, priv->host_client_id); + DBG("failed to connect client_id=%d state=%d.\n", + priv->host_client_id, priv->state); + if (err) + DBG("failed connect err=%08x\n", err); + priv->state = HECI_FILE_DISCONNECTED; + spin_unlock_bh(&dev->device_lock); + return 0; + } + DBG("successfully connected client_id=%d.\n", + priv->host_client_id); + return 1; +} + +/** + * host_init_wd - heci initialization wd. + * + * @dev: Device object for our driver + */ +static void host_init_wd(struct iamt_heci_device *dev) +{ + spin_lock_bh(&dev->device_lock); + + heci_init_file_private(&dev->wd_file_ext, NULL); + + /* look for WD client and connect to it */ + dev->wd_file_ext.state = HECI_FILE_DISCONNECTED; + dev->wd_timeout = 0; + + if (dev->asf_mode) { + memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE); + } else { + /* AMT mode */ + dev->wd_timeout = AMT_WD_VALUE; + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout); + memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE); + memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE, + &dev->wd_timeout, sizeof(__u16)); + } + + /* find ME WD client */ + heci_find_me_client(dev, &dev->wd_file_ext, + &heci_wd_guid, HECI_WD_HOST_CLIENT_ID); + spin_unlock_bh(&dev->device_lock); + + DBG("check wd_file_ext\n"); + if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) { + if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) { + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout); + if (dev->wd_timeout != 0) + dev->wd_due_counter = 1; + else + dev->wd_due_counter = 0; + DBG("successfully connected to WD client.\n"); + } + } else + DBG("failed to find WD client.\n"); + + + spin_lock_bh(&dev->device_lock); + dev->wd_timer.function = &heci_wd_timer; + dev->wd_timer.data = (unsigned long) dev; + spin_unlock_bh(&dev->device_lock); +} + + +/** + * host_init_iamthif - heci initialization iamthif client. + * + * @dev: Device object for our driver + * + */ +static void host_init_iamthif(struct iamt_heci_device *dev) +{ + __u8 i; + + spin_lock_bh(&dev->device_lock); + + heci_init_file_private(&dev->iamthif_file_ext, NULL); + dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED; + + /* find ME PTHI client */ + i = heci_find_me_client(dev, &dev->iamthif_file_ext, + &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID); + if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) { + DBG("failed to find iamthif client.\n"); + spin_unlock_bh(&dev->device_lock); + return; + } + + BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU); + + spin_unlock_bh(&dev->device_lock); + if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) { + DBG("connected to iamthif client.\n"); + dev->iamthif_state = HECI_IAMTHIF_IDLE; + } +} + +/** + * heci_alloc_file_private - allocates a private file structure and set it up. + * @file: the file structure + * + * returns The allocated file or NULL on failure + */ +struct heci_file_private *heci_alloc_file_private(struct file *file) +{ + struct heci_file_private *priv; + + priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL); + if (!priv) + return NULL; + + heci_init_file_private(priv, file); + + return priv; +} + + + +/** + * heci_disconnect_host_client - send disconnect message to fw from host client. + * + * @dev: Device object for our driver + * @file_ext: private data of the file object + * + * returns 0 on success, <0 on failure. + */ +int heci_disconnect_host_client(struct iamt_heci_device *dev, + struct heci_file_private *file_ext) +{ + int rets, err; + long timeout = 15; /* 15 seconds */ + struct heci_cb_private *priv_cb; + + if ((!dev) || (!file_ext)) + return -ENODEV; + + if (file_ext->state != HECI_FILE_DISCONNECTING) + return 0; + + priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL); + if (!priv_cb) + return -ENOMEM; + + INIT_LIST_HEAD(&priv_cb->cb_list); + priv_cb->file_private = file_ext; + priv_cb->major_file_operations = HECI_CLOSE; + spin_lock_bh(&dev->device_lock); + if (dev->host_buffer_is_empty) { + dev->host_buffer_is_empty = 0; + if (heci_disconnect(dev, file_ext)) { + list_add_tail(&priv_cb->cb_list, + &dev->ctrl_rd_list.heci_cb.cb_list); + } else { + spin_unlock_bh(&dev->device_lock); + rets = -ENODEV; + DBG("failed to call heci_disconnect.\n"); + goto free; + } + } else { + DBG("add disconnect cb to control write list\n"); + list_add_tail(&priv_cb->cb_list, + &dev->ctrl_wr_list.heci_cb.cb_list); + } + spin_unlock_bh(&dev->device_lock); + + err = wait_event_timeout(dev->wait_recvd_msg, + (HECI_FILE_DISCONNECTED == file_ext->state), + timeout * HZ); + if (HECI_FILE_DISCONNECTED == file_ext->state) { + rets = 0; + DBG("successfully disconnected from fw client.\n"); + } else { + rets = -ENODEV; + if (HECI_FILE_DISCONNECTED != file_ext->state) + DBG("wrong status client disconnect.\n"); + + if (err) + DBG("wait failed disconnect err=%08x\n", err); + + DBG("failed to disconnect from fw client.\n"); + } + + spin_lock_bh(&dev->device_lock); + heci_flush_list(&dev->ctrl_rd_list, file_ext); + heci_flush_list(&dev->ctrl_wr_list, file_ext); + spin_unlock_bh(&dev->device_lock); +free: + heci_free_cb_private(priv_cb); + return rets; +} + +/** + * heci_remove_client_from_file_list - + * remove file private data from device file list + * + * @dev: Device object for our driver + * @host_client_id: host client id to be removed + */ +void heci_remove_client_from_file_list(struct iamt_heci_device *dev, + __u8 host_client_id) +{ + struct heci_file_private *file_pos = NULL; + struct heci_file_private *file_next = NULL; + list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) { + if (host_client_id == file_pos->host_client_id) { + DBG("remove host client = %d, ME client = %d\n", + file_pos->host_client_id, + file_pos->me_client_id); + list_del_init(&file_pos->link); + break; + } + } +} |