diff options
Diffstat (limited to 'drivers/misc/mei/init.c')
| -rw-r--r-- | drivers/misc/mei/init.c | 735 |
1 files changed, 735 insertions, 0 deletions
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c new file mode 100644 index 000000000000..afb0a583b566 --- /dev/null +++ b/drivers/misc/mei/init.c @@ -0,0 +1,735 @@ +/* + * + * 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/sched.h> +#include <linux/wait.h> +#include <linux/delay.h> + +#include "mei_dev.h" +#include "hw.h" +#include "interface.h" +#include "mei.h" + +const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac, + 0xa8, 0x46, 0xe0, 0xff, 0x65, + 0x81, 0x4c); + +/** + * mei_io_list_init - Sets up a queue list. + * + * @list: An instance io list structure + * @dev: the device structure + */ +void mei_io_list_init(struct mei_io_list *list) +{ + /* initialize our queue list */ + INIT_LIST_HEAD(&list->mei_cb.cb_list); +} + +/** + * mei_io_list_flush - removes list entry belonging to cl. + * + * @list: An instance of our list structure + * @cl: private data of the file object + */ +void mei_io_list_flush(struct mei_io_list *list, struct mei_cl *cl) +{ + struct mei_cl_cb *pos; + struct mei_cl_cb *next; + + list_for_each_entry_safe(pos, next, &list->mei_cb.cb_list, cb_list) { + if (pos->file_private) { + struct mei_cl *cl_tmp; + cl_tmp = (struct mei_cl *)pos->file_private; + if (mei_cl_cmp_id(cl, cl_tmp)) + list_del(&pos->cb_list); + } + } +} +/** + * mei_cl_flush_queues - flushes queue lists belonging to cl. + * + * @dev: the device structure + * @cl: private data of the file object + */ +int mei_cl_flush_queues(struct mei_cl *cl) +{ + if (!cl || !cl->dev) + return -EINVAL; + + dev_dbg(&cl->dev->pdev->dev, "remove list entry belonging to cl\n"); + mei_io_list_flush(&cl->dev->read_list, cl); + mei_io_list_flush(&cl->dev->write_list, cl); + mei_io_list_flush(&cl->dev->write_waiting_list, cl); + mei_io_list_flush(&cl->dev->ctrl_wr_list, cl); + mei_io_list_flush(&cl->dev->ctrl_rd_list, cl); + mei_io_list_flush(&cl->dev->amthi_cmd_list, cl); + mei_io_list_flush(&cl->dev->amthi_read_complete_list, cl); + return 0; +} + + + +/** + * mei_reset_iamthif_params - initializes mei device iamthif + * + * @dev: the device structure + */ +static void mei_reset_iamthif_params(struct mei_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 = false; + dev->iamthif_ioctl = false; + dev->iamthif_state = MEI_IAMTHIF_IDLE; + dev->iamthif_timer = 0; +} + +/** + * init_mei_device - allocates and initializes the mei device structure + * + * @pdev: The pci device structure + * + * returns The mei_device_device pointer on success, NULL on failure. + */ +struct mei_device *mei_device_init(struct pci_dev *pdev) +{ + struct mei_device *dev; + + dev = kzalloc(sizeof(struct mei_device), GFP_KERNEL); + if (!dev) + return NULL; + + /* setup our list array */ + INIT_LIST_HEAD(&dev->file_list); + INIT_LIST_HEAD(&dev->wd_cl.link); + INIT_LIST_HEAD(&dev->iamthif_cl.link); + mutex_init(&dev->device_lock); + init_waitqueue_head(&dev->wait_recvd_msg); + init_waitqueue_head(&dev->wait_stop_wd); + dev->mei_state = MEI_INITIALIZING; + dev->iamthif_state = MEI_IAMTHIF_IDLE; + dev->wd_interface_reg = false; + + + mei_io_list_init(&dev->read_list); + mei_io_list_init(&dev->write_list); + mei_io_list_init(&dev->write_waiting_list); + mei_io_list_init(&dev->ctrl_wr_list); + mei_io_list_init(&dev->ctrl_rd_list); + mei_io_list_init(&dev->amthi_cmd_list); + mei_io_list_init(&dev->amthi_read_complete_list); + dev->pdev = pdev; + return dev; +} + +/** + * mei_hw_init - initializes host and fw to start work. + * + * @dev: the device structure + * + * returns 0 on success, <0 on failure. + */ +int mei_hw_init(struct mei_device *dev) +{ + int err = 0; + int ret; + + mutex_lock(&dev->device_lock); + + dev->host_hw_state = mei_hcsr_read(dev); + dev->me_hw_state = mei_mecsr_read(dev); + dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, mestate = 0x%08x.\n", + dev->host_hw_state, dev->me_hw_state); + + /* acknowledge interrupt and stop interupts */ + if ((dev->host_hw_state & H_IS) == H_IS) + mei_reg_write(dev, H_CSR, dev->host_hw_state); + + dev->recvd_msg = false; + dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); + + mei_reset(dev, 1); + + dev_dbg(&dev->pdev->dev, "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) { + mutex_unlock(&dev->device_lock); + err = wait_event_interruptible_timeout(dev->wait_recvd_msg, + dev->recvd_msg, MEI_INTEROP_TIMEOUT); + mutex_lock(&dev->device_lock); + } + + if (err <= 0 && !dev->recvd_msg) { + dev->mei_state = MEI_DISABLED; + dev_dbg(&dev->pdev->dev, + "wait_event_interruptible_timeout failed" + "on wait for ME to turn on ME_RDY.\n"); + ret = -ENODEV; + goto out; + } + + if (!(((dev->host_hw_state & H_RDY) == H_RDY) && + ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) { + dev->mei_state = MEI_DISABLED; + dev_dbg(&dev->pdev->dev, + "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)) + dev_dbg(&dev->pdev->dev, "host turn off H_RDY.\n"); + + if (!(dev->me_hw_state & ME_RDY_HRA)) + dev_dbg(&dev->pdev->dev, "ME turn off ME_RDY.\n"); + + dev_err(&dev->pdev->dev, "link layer initialization failed.\n"); + ret = -ENODEV; + goto out; + } + + if (dev->version.major_version != HBM_MAJOR_VERSION || + dev->version.minor_version != HBM_MINOR_VERSION) { + dev_dbg(&dev->pdev->dev, "MEI start failed.\n"); + ret = -ENODEV; + goto out; + } + + dev->recvd_msg = false; + dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", + dev->host_hw_state, dev->me_hw_state); + dev_dbg(&dev->pdev->dev, "ME turn on ME_RDY and host turn on H_RDY.\n"); + dev_dbg(&dev->pdev->dev, "link layer has been established.\n"); + dev_dbg(&dev->pdev->dev, "MEI start success.\n"); + ret = 0; + +out: + mutex_unlock(&dev->device_lock); + return ret; +} + +/** + * mei_hw_reset - resets fw via mei csr register. + * + * @dev: the device structure + * @interrupts_enabled: if interrupt should be enabled after reset. + */ +static void mei_hw_reset(struct mei_device *dev, int interrupts_enabled) +{ + dev->host_hw_state |= (H_RST | H_IG); + + if (interrupts_enabled) + mei_enable_interrupts(dev); + else + mei_disable_interrupts(dev); +} + +/** + * mei_reset - resets host and fw. + * + * @dev: the device structure + * @interrupts_enabled: if interrupt should be enabled after reset. + */ +void mei_reset(struct mei_device *dev, int interrupts_enabled) +{ + struct mei_cl *cl_pos = NULL; + struct mei_cl *cl_next = NULL; + struct mei_cl_cb *cb_pos = NULL; + struct mei_cl_cb *cb_next = NULL; + bool unexpected; + + if (dev->mei_state == MEI_RECOVERING_FROM_RESET) { + dev->need_reset = true; + return; + } + + unexpected = (dev->mei_state != MEI_INITIALIZING && + dev->mei_state != MEI_DISABLED && + dev->mei_state != MEI_POWER_DOWN && + dev->mei_state != MEI_POWER_UP); + + dev->host_hw_state = mei_hcsr_read(dev); + + dev_dbg(&dev->pdev->dev, "before reset host_hw_state = 0x%08x.\n", + dev->host_hw_state); + + mei_hw_reset(dev, interrupts_enabled); + + dev->host_hw_state &= ~H_RST; + dev->host_hw_state |= H_IG; + + mei_hcsr_set(dev); + + dev_dbg(&dev->pdev->dev, "currently saved host_hw_state = 0x%08x.\n", + dev->host_hw_state); + + dev->need_reset = false; + + if (dev->mei_state != MEI_INITIALIZING) { + if (dev->mei_state != MEI_DISABLED && + dev->mei_state != MEI_POWER_DOWN) + dev->mei_state = MEI_RESETING; + + list_for_each_entry_safe(cl_pos, + cl_next, &dev->file_list, link) { + cl_pos->state = MEI_FILE_DISCONNECTED; + cl_pos->mei_flow_ctrl_creds = 0; + cl_pos->read_cb = NULL; + cl_pos->timer_count = 0; + } + /* remove entry if already in list */ + dev_dbg(&dev->pdev->dev, "list del iamthif and wd file list.\n"); + mei_remove_client_from_file_list(dev, + dev->wd_cl.host_client_id); + + mei_remove_client_from_file_list(dev, + dev->iamthif_cl.host_client_id); + + mei_reset_iamthif_params(dev); + dev->wd_due_counter = 0; + dev->extra_write_index = 0; + } + + dev->me_clients_num = 0; + dev->rd_msg_hdr = 0; + dev->stop = false; + dev->wd_pending = false; + + /* update the state of the registers after reset */ + dev->host_hw_state = mei_hcsr_read(dev); + dev->me_hw_state = mei_mecsr_read(dev); + + dev_dbg(&dev->pdev->dev, "after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", + dev->host_hw_state, dev->me_hw_state); + + if (unexpected) + dev_warn(&dev->pdev->dev, "unexpected reset.\n"); + + /* Wake up all readings so they can be interrupted */ + list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { + if (waitqueue_active(&cl_pos->rx_wait)) { + dev_dbg(&dev->pdev->dev, "Waking up client!\n"); + wake_up_interruptible(&cl_pos->rx_wait); + } + } + /* remove all waiting requests */ + list_for_each_entry_safe(cb_pos, cb_next, + &dev->write_list.mei_cb.cb_list, cb_list) { + list_del(&cb_pos->cb_list); + mei_free_cb_private(cb_pos); + } +} + + + +/** + * host_start_message - mei host sends start message. + * + * @dev: the device structure + * + * returns none. + */ +void mei_host_start_message(struct mei_device *dev) +{ + struct mei_msg_hdr *mei_hdr; + struct hbm_host_version_request *host_start_req; + + /* host start 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_version_request); + mei_hdr->msg_complete = 1; + mei_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->hbm_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 = false; + if (mei_write_message(dev, mei_hdr, (unsigned char *)host_start_req, + mei_hdr->length)) { + dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); + dev->mei_state = MEI_RESETING; + mei_reset(dev, 1); + } + dev->init_clients_state = MEI_START_MESSAGE; + dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; + return ; +} + +/** + * host_enum_clients_message - host sends enumeration client request message. + * + * @dev: the device structure + * + * returns none. + */ +void mei_host_enum_clients_message(struct mei_device *dev) +{ + struct mei_msg_hdr *mei_hdr; + struct hbm_host_enum_request *host_enum_req; + mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; + /* enumerate clients */ + mei_hdr->host_addr = 0; + mei_hdr->me_addr = 0; + mei_hdr->length = sizeof(struct hbm_host_enum_request); + mei_hdr->msg_complete = 1; + mei_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->hbm_cmd = HOST_ENUM_REQ_CMD; + if (mei_write_message(dev, mei_hdr, (unsigned char *)host_enum_req, + mei_hdr->length)) { + dev->mei_state = MEI_RESETING; + dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); + mei_reset(dev, 1); + } + dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE; + dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; + return; +} + + +/** + * allocate_me_clients_storage - allocates storage for me clients + * + * @dev: the device structure + * + * returns none. + */ +void mei_allocate_me_clients_storage(struct mei_device *dev) +{ + struct mei_me_client *clients; + int b; + + /* count how many ME clients we have */ + for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX) + dev->me_clients_num++; + + if (dev->me_clients_num <= 0) + return ; + + + if (dev->me_clients != NULL) { + kfree(dev->me_clients); + dev->me_clients = NULL; + } + dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n", + dev->me_clients_num * sizeof(struct mei_me_client)); + /* allocate storage for ME clients representation */ + clients = kcalloc(dev->me_clients_num, + sizeof(struct mei_me_client), GFP_KERNEL); + if (!clients) { + dev_dbg(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); + dev->mei_state = MEI_RESETING; + mei_reset(dev, 1); + return ; + } + dev->me_clients = clients; + return ; +} +/** + * host_client_properties - reads properties for client + * + * @dev: the device structure + * + * returns: + * < 0 - Error. + * = 0 - no more clients. + * = 1 - still have clients to send properties request. + */ +int mei_host_client_properties(struct mei_device *dev) +{ + struct mei_msg_hdr *mei_header; + struct hbm_props_request *host_cli_req; + int b; + u8 client_num = dev->me_client_presentation_num; + + b = dev->me_client_index; + b = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, b); + if (b < MEI_CLIENTS_MAX) { + dev->me_clients[client_num].client_id = b; + dev->me_clients[client_num].mei_flow_ctrl_creds = 0; + mei_header = (struct mei_msg_hdr *)&dev->wr_msg_buf[0]; + mei_header->host_addr = 0; + mei_header->me_addr = 0; + mei_header->length = sizeof(struct hbm_props_request); + mei_header->msg_complete = 1; + mei_header->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->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; + host_cli_req->address = b; + + if (mei_write_message(dev, mei_header, + (unsigned char *)host_cli_req, + mei_header->length)) { + dev->mei_state = MEI_RESETING; + dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); + mei_reset(dev, 1); + return -EIO; + } + + dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; + dev->me_client_index = b; + return 1; + } + + return 0; +} + +/** + * mei_init_file_private - initializes private file structure. + * + * @priv: private file structure to be initialized + * @file: the file structure + */ +void mei_cl_init(struct mei_cl *priv, struct mei_device *dev) +{ + memset(priv, 0, sizeof(struct mei_cl)); + init_waitqueue_head(&priv->wait); + init_waitqueue_head(&priv->rx_wait); + init_waitqueue_head(&priv->tx_wait); + INIT_LIST_HEAD(&priv->link); + priv->reading_state = MEI_IDLE; + priv->writing_state = MEI_IDLE; + priv->dev = dev; +} + +int mei_find_me_client_index(const struct mei_device *dev, uuid_le cuuid) +{ + int i, res = -1; + + for (i = 0; i < dev->me_clients_num; ++i) + if (uuid_le_cmp(cuuid, + dev->me_clients[i].props.protocol_name) == 0) { + res = i; + break; + } + + return res; +} + + +/** + * mei_find_me_client_update_filext - searches for ME client guid + * sets client_id in mei_file_private if found + * @dev: the device structure + * @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 + */ +u8 mei_find_me_client_update_filext(struct mei_device *dev, struct mei_cl *priv, + const uuid_le *cguid, u8 client_id) +{ + int i; + + if (!dev || !priv || !cguid) + return 0; + + /* check for valid client id */ + i = mei_find_me_client_index(dev, *cguid); + if (i >= 0) { + priv->me_client_id = dev->me_clients[i].client_id; + priv->state = MEI_FILE_CONNECTING; + priv->host_client_id = client_id; + + list_add_tail(&priv->link, &dev->file_list); + return (u8)i; + } + + return 0; +} + +/** + * host_init_iamthif - mei initialization iamthif client. + * + * @dev: the device structure + * + */ +void mei_host_init_iamthif(struct mei_device *dev) +{ + u8 i; + unsigned char *msg_buf; + + mei_cl_init(&dev->iamthif_cl, dev); + dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; + + /* find ME amthi client */ + i = mei_find_me_client_update_filext(dev, &dev->iamthif_cl, + &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID); + if (dev->iamthif_cl.state != MEI_FILE_CONNECTING) { + dev_dbg(&dev->pdev->dev, "failed to find iamthif client.\n"); + return; + } + + /* Assign iamthif_mtu to the value received from ME */ + + dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length; + dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n", + dev->me_clients[i].props.max_msg_length); + + kfree(dev->iamthif_msg_buf); + dev->iamthif_msg_buf = NULL; + + /* allocate storage for ME message buffer */ + msg_buf = kcalloc(dev->iamthif_mtu, + sizeof(unsigned char), GFP_KERNEL); + if (!msg_buf) { + dev_dbg(&dev->pdev->dev, "memory allocation for ME message buffer failed.\n"); + return; + } + + dev->iamthif_msg_buf = msg_buf; + + if (mei_connect(dev, &dev->iamthif_cl)) { + dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n"); + dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; + dev->iamthif_cl.host_client_id = 0; + } else { + dev->iamthif_cl.timer_count = CONNECT_TIMEOUT; + } +} + +/** + * mei_alloc_file_private - allocates a private file structure and sets it up. + * @file: the file structure + * + * returns The allocated file or NULL on failure + */ +struct mei_cl *mei_cl_allocate(struct mei_device *dev) +{ + struct mei_cl *cl; + + cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL); + if (!cl) + return NULL; + + mei_cl_init(cl, dev); + + return cl; +} + + + +/** + * mei_disconnect_host_client - sends disconnect message to fw from host client. + * + * @dev: the device structure + * @cl: private data of the file object + * + * Locking: called under "dev->device_lock" lock + * + * returns 0 on success, <0 on failure. + */ +int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl) +{ + int rets, err; + long timeout = 15; /* 15 seconds */ + struct mei_cl_cb *cb; + + if (!dev || !cl) + return -ENODEV; + + if (cl->state != MEI_FILE_DISCONNECTING) + return 0; + + cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); + if (!cb) + return -ENOMEM; + + INIT_LIST_HEAD(&cb->cb_list); + cb->file_private = cl; + cb->major_file_operations = MEI_CLOSE; + if (dev->mei_host_buffer_is_empty) { + dev->mei_host_buffer_is_empty = false; + if (mei_disconnect(dev, cl)) { + rets = -ENODEV; + dev_dbg(&dev->pdev->dev, "failed to call mei_disconnect.\n"); + goto free; + } + mdelay(10); /* Wait for hardware disconnection ready */ + list_add_tail(&cb->cb_list, &dev->ctrl_rd_list.mei_cb.cb_list); + } else { + dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n"); + list_add_tail(&cb->cb_list, + &dev->ctrl_wr_list.mei_cb.cb_list); + } + mutex_unlock(&dev->device_lock); + + err = wait_event_timeout(dev->wait_recvd_msg, + (MEI_FILE_DISCONNECTED == cl->state), + timeout * HZ); + + mutex_lock(&dev->device_lock); + if (MEI_FILE_DISCONNECTED == cl->state) { + rets = 0; + dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n"); + } else { + rets = -ENODEV; + if (MEI_FILE_DISCONNECTED != cl->state) + dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n"); + + if (err) + dev_dbg(&dev->pdev->dev, + "wait failed disconnect err=%08x\n", + err); + + dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n"); + } + + mei_io_list_flush(&dev->ctrl_rd_list, cl); + mei_io_list_flush(&dev->ctrl_wr_list, cl); +free: + mei_free_cb_private(cb); + return rets; +} + +/** + * mei_remove_client_from_file_list - + * removes file private data from device file list + * + * @dev: the device structure + * @host_client_id: host client id to be removed + */ +void mei_remove_client_from_file_list(struct mei_device *dev, + u8 host_client_id) +{ + 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 (host_client_id == cl_pos->host_client_id) { + dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n", + cl_pos->host_client_id, + cl_pos->me_client_id); + list_del_init(&cl_pos->link); + break; + } + } +} |