diff options
Diffstat (limited to 'drivers/misc/mei')
| -rw-r--r-- | drivers/misc/mei/Makefile | 5 | ||||
| -rw-r--r-- | drivers/misc/mei/amthif.c | 152 | ||||
| -rw-r--r-- | drivers/misc/mei/client.c | 679 | ||||
| -rw-r--r-- | drivers/misc/mei/client.h | 97 | ||||
| -rw-r--r-- | drivers/misc/mei/hbm.c | 669 | ||||
| -rw-r--r-- | drivers/misc/mei/hbm.h | 39 | ||||
| -rw-r--r-- | drivers/misc/mei/hw-me-regs.h | 167 | ||||
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 386 | ||||
| -rw-r--r-- | drivers/misc/mei/hw-me.h (renamed from drivers/misc/mei/interface.h) | 33 | ||||
| -rw-r--r-- | drivers/misc/mei/hw.h | 125 | ||||
| -rw-r--r-- | drivers/misc/mei/init.c | 524 | ||||
| -rw-r--r-- | drivers/misc/mei/interface.c | 388 | ||||
| -rw-r--r-- | drivers/misc/mei/interrupt.c | 550 | ||||
| -rw-r--r-- | drivers/misc/mei/iorw.c | 366 | ||||
| -rw-r--r-- | drivers/misc/mei/main.c | 195 | ||||
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 228 | ||||
| -rw-r--r-- | drivers/misc/mei/wd.c | 70 |
17 files changed, 2452 insertions, 2221 deletions
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index 0017842e166c..9f719339e594 100644 --- a/drivers/misc/mei/Makefile +++ b/drivers/misc/mei/Makefile @@ -4,9 +4,10 @@ # obj-$(CONFIG_INTEL_MEI) += mei.o mei-objs := init.o +mei-objs += hbm.o mei-objs += interrupt.o -mei-objs += interface.o -mei-objs += iorw.o +mei-objs += hw-me.o mei-objs += main.o mei-objs += amthif.o mei-objs += wd.o +mei-objs += client.o diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index e40ffd9502d1..263ed4ccd6f2 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -31,15 +31,16 @@ #include <linux/jiffies.h> #include <linux/uaccess.h> +#include <linux/mei.h> #include "mei_dev.h" -#include "hw.h" -#include <linux/mei.h> -#include "interface.h" +#include "hbm.h" +#include "hw-me.h" +#include "client.h" -const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac, - 0xa8, 0x46, 0xe0, 0xff, 0x65, - 0x81, 0x4c); +const uuid_le mei_amthif_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, + 0xac, 0xa8, 0x46, 0xe0, + 0xff, 0x65, 0x81, 0x4c); /** * mei_amthif_reset_params - initializes mei device iamthif @@ -64,22 +65,24 @@ void mei_amthif_reset_params(struct mei_device *dev) * @dev: the device structure * */ -void mei_amthif_host_init(struct mei_device *dev) +int mei_amthif_host_init(struct mei_device *dev) { - int i; + struct mei_cl *cl = &dev->iamthif_cl; unsigned char *msg_buf; + int ret, i; + + dev->iamthif_state = MEI_IAMTHIF_IDLE; - mei_cl_init(&dev->iamthif_cl, dev); - dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; + mei_cl_init(cl, dev); - /* find ME amthi client */ - i = mei_me_cl_link(dev, &dev->iamthif_cl, - &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID); + i = mei_me_cl_by_uuid(dev, &mei_amthif_guid); if (i < 0) { - dev_info(&dev->pdev->dev, "failed to find iamthif client.\n"); - return; + dev_info(&dev->pdev->dev, "amthif: failed to find the client\n"); + return -ENOENT; } + cl->me_client_id = dev->me_clients[i].client_id; + /* Assign iamthif_mtu to the value received from ME */ dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length; @@ -93,19 +96,29 @@ void mei_amthif_host_init(struct mei_device *dev) 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_err(&dev->pdev->dev, "amthif: memory allocation for ME message buffer failed.\n"); + return -ENOMEM; } 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; + ret = mei_cl_link(cl, MEI_IAMTHIF_HOST_CLIENT_ID); + + if (ret < 0) { + dev_err(&dev->pdev->dev, "amthif: failed link client\n"); + return -ENOENT; + } + + cl->state = MEI_FILE_CONNECTING; + + if (mei_hbm_cl_connect_req(dev, cl)) { + dev_dbg(&dev->pdev->dev, "amthif: Failed to connect to ME client\n"); + cl->state = MEI_FILE_DISCONNECTED; + cl->host_client_id = 0; } else { - dev->iamthif_cl.timer_count = MEI_CONNECT_TIMEOUT; + cl->timer_count = MEI_CONNECT_TIMEOUT; } + return 0; } /** @@ -168,10 +181,10 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id); if (i < 0) { - dev_dbg(&dev->pdev->dev, "amthi client not found.\n"); + dev_dbg(&dev->pdev->dev, "amthif client not found.\n"); return -ENODEV; } - dev_dbg(&dev->pdev->dev, "checking amthi data\n"); + dev_dbg(&dev->pdev->dev, "checking amthif data\n"); cb = mei_amthif_find_read_list_entry(dev, file); /* Check for if we can block or not*/ @@ -179,7 +192,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, return -EAGAIN; - dev_dbg(&dev->pdev->dev, "waiting for amthi data\n"); + dev_dbg(&dev->pdev->dev, "waiting for amthif data\n"); while (cb == NULL) { /* unlock the Mutex */ mutex_unlock(&dev->device_lock); @@ -197,17 +210,17 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, } - dev_dbg(&dev->pdev->dev, "Got amthi data\n"); + dev_dbg(&dev->pdev->dev, "Got amthif data\n"); dev->iamthif_timer = 0; if (cb) { timeout = cb->read_time + mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER); - dev_dbg(&dev->pdev->dev, "amthi timeout = %lud\n", + dev_dbg(&dev->pdev->dev, "amthif timeout = %lud\n", timeout); if (time_after(jiffies, timeout)) { - dev_dbg(&dev->pdev->dev, "amthi Time out\n"); + dev_dbg(&dev->pdev->dev, "amthif Time out\n"); /* 15 sec for the message has expired */ list_del(&cb->list); rets = -ETIMEDOUT; @@ -227,9 +240,9 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, * remove message from deletion list */ - dev_dbg(&dev->pdev->dev, "amthi cb->response_buffer size - %d\n", + dev_dbg(&dev->pdev->dev, "amthif cb->response_buffer size - %d\n", cb->response_buffer.size); - dev_dbg(&dev->pdev->dev, "amthi cb->buf_idx - %lu\n", cb->buf_idx); + dev_dbg(&dev->pdev->dev, "amthif cb->buf_idx - %lu\n", cb->buf_idx); /* length is being turncated to PAGE_SIZE, however, * the buf_idx may point beyond */ @@ -245,7 +258,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, } } free: - dev_dbg(&dev->pdev->dev, "free amthi cb memory.\n"); + dev_dbg(&dev->pdev->dev, "free amthif cb memory.\n"); *offset = 0; mei_io_cb_free(cb); out: @@ -269,7 +282,7 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb) if (!dev || !cb) return -ENODEV; - dev_dbg(&dev->pdev->dev, "write data to amthi client.\n"); + dev_dbg(&dev->pdev->dev, "write data to amthif client.\n"); dev->iamthif_state = MEI_IAMTHIF_WRITING; dev->iamthif_current_cb = cb; @@ -280,7 +293,7 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb) memcpy(dev->iamthif_msg_buf, cb->request_buffer.data, cb->request_buffer.size); - ret = mei_flow_ctrl_creds(dev, &dev->iamthif_cl); + ret = mei_cl_flow_ctrl_creds(&dev->iamthif_cl); if (ret < 0) return ret; @@ -300,21 +313,20 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb) mei_hdr.reserved = 0; dev->iamthif_msg_buf_index += mei_hdr.length; if (mei_write_message(dev, &mei_hdr, - (unsigned char *)(dev->iamthif_msg_buf), - mei_hdr.length)) + (unsigned char *)dev->iamthif_msg_buf)) return -ENODEV; if (mei_hdr.msg_complete) { - if (mei_flow_ctrl_reduce(dev, &dev->iamthif_cl)) + if (mei_cl_flow_ctrl_reduce(&dev->iamthif_cl)) return -ENODEV; dev->iamthif_flow_control_pending = true; dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL; - dev_dbg(&dev->pdev->dev, "add amthi cb to write waiting list\n"); + dev_dbg(&dev->pdev->dev, "add amthif cb to write waiting list\n"); dev->iamthif_current_cb = cb; dev->iamthif_file_object = cb->file_object; list_add_tail(&cb->list, &dev->write_waiting_list.list); } else { - dev_dbg(&dev->pdev->dev, "message does not complete, so add amthi cb to write list.\n"); + dev_dbg(&dev->pdev->dev, "message does not complete, so add amthif cb to write list.\n"); list_add_tail(&cb->list, &dev->write_list.list); } } else { @@ -383,7 +395,7 @@ void mei_amthif_run_next_cmd(struct mei_device *dev) dev->iamthif_timer = 0; dev->iamthif_file_object = NULL; - dev_dbg(&dev->pdev->dev, "complete amthi cmd_list cb.\n"); + dev_dbg(&dev->pdev->dev, "complete amthif cmd_list cb.\n"); list_for_each_entry_safe(pos, next, &dev->amthif_cmd_list.list, list) { list_del(&pos->list); @@ -392,7 +404,7 @@ void mei_amthif_run_next_cmd(struct mei_device *dev) status = mei_amthif_send_cmd(dev, pos); if (status) { dev_dbg(&dev->pdev->dev, - "amthi write failed status = %d\n", + "amthif write failed status = %d\n", status); return; } @@ -412,7 +424,7 @@ unsigned int mei_amthif_poll(struct mei_device *dev, if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE && dev->iamthif_file_object == file) { mask |= (POLLIN | POLLRDNORM); - dev_dbg(&dev->pdev->dev, "run next amthi cb\n"); + dev_dbg(&dev->pdev->dev, "run next amthif cb\n"); mei_amthif_run_next_cmd(dev); } return mask; @@ -434,54 +446,51 @@ unsigned int mei_amthif_poll(struct mei_device *dev, int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots, struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list) { - struct mei_msg_hdr *mei_hdr; + struct mei_msg_hdr mei_hdr; struct mei_cl *cl = cb->cl; size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index; size_t msg_slots = mei_data2slots(len); - 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->reserved = 0; + mei_hdr.host_addr = cl->host_client_id; + mei_hdr.me_addr = cl->me_client_id; + mei_hdr.reserved = 0; if (*slots >= msg_slots) { - mei_hdr->length = len; - mei_hdr->msg_complete = 1; + mei_hdr.length = len; + mei_hdr.msg_complete = 1; /* Split the message only if we can write the whole host buffer */ } else if (*slots == dev->hbuf_depth) { msg_slots = *slots; len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); - mei_hdr->length = len; - mei_hdr->msg_complete = 0; + mei_hdr.length = len; + mei_hdr.msg_complete = 0; } else { /* wait for next time the host buffer is empty */ return 0; } - dev_dbg(&dev->pdev->dev, "msg: len = %d complete = %d\n", - mei_hdr->length, mei_hdr->msg_complete); + dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr)); *slots -= msg_slots; - if (mei_write_message(dev, mei_hdr, - dev->iamthif_msg_buf + dev->iamthif_msg_buf_index, - mei_hdr->length)) { + if (mei_write_message(dev, &mei_hdr, + dev->iamthif_msg_buf + dev->iamthif_msg_buf_index)) { dev->iamthif_state = MEI_IAMTHIF_IDLE; cl->status = -ENODEV; list_del(&cb->list); return -ENODEV; } - if (mei_flow_ctrl_reduce(dev, cl)) + if (mei_cl_flow_ctrl_reduce(cl)) return -ENODEV; - dev->iamthif_msg_buf_index += mei_hdr->length; + dev->iamthif_msg_buf_index += mei_hdr.length; cl->status = 0; - if (mei_hdr->msg_complete) { + if (mei_hdr.msg_complete) { dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL; dev->iamthif_flow_control_pending = true; - /* save iamthif cb sent to amthi client */ + /* save iamthif cb sent to amthif client */ cb->buf_idx = dev->iamthif_msg_buf_index; dev->iamthif_current_cb = cb; @@ -494,11 +503,11 @@ int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots, /** * mei_amthif_irq_read_message - read routine after ISR to - * handle the read amthi message + * handle the read amthif message * * @complete_list: An instance of our list structure * @dev: the device structure - * @mei_hdr: header of amthi message + * @mei_hdr: header of amthif message * * returns 0 on success, <0 on failure. */ @@ -522,10 +531,10 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list, return 0; dev_dbg(&dev->pdev->dev, - "amthi_message_buffer_index =%d\n", + "amthif_message_buffer_index =%d\n", mei_hdr->length); - dev_dbg(&dev->pdev->dev, "completed amthi read.\n "); + dev_dbg(&dev->pdev->dev, "completed amthif read.\n "); if (!dev->iamthif_current_cb) return -ENODEV; @@ -540,8 +549,8 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list, cb->read_time = jiffies; if (dev->iamthif_ioctl && cb->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 "); + dev_dbg(&dev->pdev->dev, "complete the amthif read cb.\n "); + dev_dbg(&dev->pdev->dev, "add the amthif read cb to complete.\n "); list_add_tail(&cb->list, &complete_list->list); } return 0; @@ -563,7 +572,7 @@ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots) return -EMSGSIZE; } *slots -= mei_data2slots(sizeof(struct hbm_flow_control)); - if (mei_send_flow_control(dev, &dev->iamthif_cl)) { + if (mei_hbm_cl_flow_control_req(dev, &dev->iamthif_cl)) { dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n"); return -EIO; } @@ -593,7 +602,7 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb) dev->iamthif_msg_buf, dev->iamthif_msg_buf_index); list_add_tail(&cb->list, &dev->amthif_rd_complete_list.list); - dev_dbg(&dev->pdev->dev, "amthi read completed\n"); + dev_dbg(&dev->pdev->dev, "amthif read completed\n"); dev->iamthif_timer = jiffies; dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n", dev->iamthif_timer); @@ -601,7 +610,7 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb) mei_amthif_run_next_cmd(dev); } - dev_dbg(&dev->pdev->dev, "completing amthi call back.\n"); + dev_dbg(&dev->pdev->dev, "completing amthif call back.\n"); wake_up_interruptible(&dev->iamthif_cl.wait); } @@ -635,7 +644,8 @@ static bool mei_clear_list(struct mei_device *dev, if (dev->iamthif_current_cb == cb_pos) { dev->iamthif_current_cb = NULL; /* send flow control to iamthif client */ - mei_send_flow_control(dev, &dev->iamthif_cl); + mei_hbm_cl_flow_control_req(dev, + &dev->iamthif_cl); } /* free all allocated buffers */ mei_io_cb_free(cb_pos); @@ -706,11 +716,11 @@ int mei_amthif_release(struct mei_device *dev, struct file *file) if (dev->iamthif_file_object == file && dev->iamthif_state != MEI_IAMTHIF_IDLE) { - dev_dbg(&dev->pdev->dev, "amthi canceled iamthif state %d\n", + dev_dbg(&dev->pdev->dev, "amthif canceled iamthif state %d\n", dev->iamthif_state); dev->iamthif_canceled = true; if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) { - dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n"); + dev_dbg(&dev->pdev->dev, "run next amthif iamthif cb\n"); mei_amthif_run_next_cmd(dev); } } diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c new file mode 100644 index 000000000000..a921001053ba --- /dev/null +++ b/drivers/misc/mei/client.c @@ -0,0 +1,679 @@ +/* + * + * 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 <linux/mei.h> + +#include "mei_dev.h" +#include "hbm.h" +#include "client.h" + +/** + * mei_me_cl_by_uuid - locate index of me client + * + * @dev: mei device + * returns me client index or -ENOENT if not found + */ +int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid) +{ + int i, res = -ENOENT; + + for (i = 0; i < dev->me_clients_num; ++i) + if (uuid_le_cmp(*uuid, + dev->me_clients[i].props.protocol_name) == 0) { + res = i; + break; + } + + return res; +} + + +/** + * mei_me_cl_by_id return index to me_clients for client_id + * + * @dev: the device structure + * @client_id: me client id + * + * Locking: called under "dev->device_lock" lock + * + * returns index on success, -ENOENT on failure. + */ + +int mei_me_cl_by_id(struct mei_device *dev, u8 client_id) +{ + int i; + for (i = 0; i < dev->me_clients_num; i++) + if (dev->me_clients[i].client_id == client_id) + break; + if (WARN_ON(dev->me_clients[i].client_id != client_id)) + return -ENOENT; + + if (i == dev->me_clients_num) + return -ENOENT; + + return i; +} + + +/** + * mei_io_list_flush - removes list entry belonging to cl. + * + * @list: An instance of our list structure + * @cl: host client + */ +void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl) +{ + struct mei_cl_cb *cb; + struct mei_cl_cb *next; + + list_for_each_entry_safe(cb, next, &list->list, list) { + if (cb->cl && mei_cl_cmp_id(cl, cb->cl)) + list_del(&cb->list); + } +} + +/** + * mei_io_cb_free - free mei_cb_private related memory + * + * @cb: mei callback struct + */ +void mei_io_cb_free(struct mei_cl_cb *cb) +{ + if (cb == NULL) + return; + + kfree(cb->request_buffer.data); + kfree(cb->response_buffer.data); + kfree(cb); +} + +/** + * mei_io_cb_init - allocate and initialize io callback + * + * @cl - mei client + * @file: pointer to file structure + * + * returns mei_cl_cb pointer or NULL; + */ +struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp) +{ + struct mei_cl_cb *cb; + + cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); + if (!cb) + return NULL; + + mei_io_list_init(cb); + + cb->file_object = fp; + cb->cl = cl; + cb->buf_idx = 0; + return cb; +} + +/** + * mei_io_cb_alloc_req_buf - allocate request buffer + * + * @cb - io callback structure + * @size: size of the buffer + * + * returns 0 on success + * -EINVAL if cb is NULL + * -ENOMEM if allocation failed + */ +int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length) +{ + if (!cb) + return -EINVAL; + + if (length == 0) + return 0; + + cb->request_buffer.data = kmalloc(length, GFP_KERNEL); + if (!cb->request_buffer.data) + return -ENOMEM; + cb->request_buffer.size = length; + return 0; +} +/** + * mei_io_cb_alloc_req_buf - allocate respose buffer + * + * @cb - io callback structure + * @size: size of the buffer + * + * returns 0 on success + * -EINVAL if cb is NULL + * -ENOMEM if allocation failed + */ +int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length) +{ + if (!cb) + return -EINVAL; + + if (length == 0) + return 0; + + cb->response_buffer.data = kmalloc(length, GFP_KERNEL); + if (!cb->response_buffer.data) + return -ENOMEM; + cb->response_buffer.size = length; + return 0; +} + + + +/** + * mei_cl_flush_queues - flushes queue lists belonging to cl. + * + * @dev: the device structure + * @cl: host client + */ +int mei_cl_flush_queues(struct mei_cl *cl) +{ + if (WARN_ON(!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->amthif_cmd_list, cl); + mei_io_list_flush(&cl->dev->amthif_rd_complete_list, cl); + return 0; +} + + +/** + * mei_cl_init - initializes intialize cl. + * + * @cl: host client to be initialized + * @dev: mei device + */ +void mei_cl_init(struct mei_cl *cl, struct mei_device *dev) +{ + memset(cl, 0, sizeof(struct mei_cl)); + init_waitqueue_head(&cl->wait); + init_waitqueue_head(&cl->rx_wait); + init_waitqueue_head(&cl->tx_wait); + INIT_LIST_HEAD(&cl->link); + cl->reading_state = MEI_IDLE; + cl->writing_state = MEI_IDLE; + cl->dev = dev; +} + +/** + * mei_cl_allocate - allocates cl structure and sets it up. + * + * @dev: mei device + * 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_cl_find_read_cb - find this cl's callback in the read list + * + * @dev: device structure + * returns cb on success, NULL on error + */ +struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl) +{ + struct mei_device *dev = cl->dev; + struct mei_cl_cb *cb = NULL; + struct mei_cl_cb *next = NULL; + + list_for_each_entry_safe(cb, next, &dev->read_list.list, list) + if (mei_cl_cmp_id(cl, cb->cl)) + return cb; + return NULL; +} + +/** mei_cl_link: allocte host id in the host map + * + * @cl - host client + * @id - fixed host id or -1 for genereting one + * returns 0 on success + * -EINVAL on incorrect values + * -ENONET if client not found + */ +int mei_cl_link(struct mei_cl *cl, int id) +{ + struct mei_device *dev; + + if (WARN_ON(!cl || !cl->dev)) + return -EINVAL; + + dev = cl->dev; + + /* If Id is not asigned get one*/ + if (id == MEI_HOST_CLIENT_ID_ANY) + id = find_first_zero_bit(dev->host_clients_map, + MEI_CLIENTS_MAX); + + if (id >= MEI_CLIENTS_MAX) { + dev_err(&dev->pdev->dev, "id exceded %d", MEI_CLIENTS_MAX) ; + return -ENOENT; + } + + dev->open_handle_count++; + + cl->host_client_id = id; + list_add_tail(&cl->link, &dev->file_list); + + set_bit(id, dev->host_clients_map); + + cl->state = MEI_FILE_INITIALIZING; + + dev_dbg(&dev->pdev->dev, "link cl host id = %d\n", cl->host_client_id); + return 0; +} + +/** + * mei_cl_unlink - remove me_cl from the list + * + * @dev: the device structure + */ +int mei_cl_unlink(struct mei_cl *cl) +{ + struct mei_device *dev; + struct mei_cl *pos, *next; + + /* don't shout on error exit path */ + if (!cl) + return 0; + + /* wd and amthif might not be initialized */ + if (!cl->dev) + return 0; + + dev = cl->dev; + + list_for_each_entry_safe(pos, next, &dev->file_list, link) { + if (cl->host_client_id == pos->host_client_id) { + dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n", + pos->host_client_id, pos->me_client_id); + list_del_init(&pos->link); + break; + } + } + return 0; +} + + +void mei_host_client_init(struct work_struct *work) +{ + struct mei_device *dev = container_of(work, + struct mei_device, init_work); + struct mei_client_properties *client_props; + int i; + + mutex_lock(&dev->device_lock); + + bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX); + dev->open_handle_count = 0; + + /* + * Reserving the first three client IDs + * 0: Reserved for MEI Bus Message communications + * 1: Reserved for Watchdog + * 2: Reserved for AMTHI + */ + bitmap_set(dev->host_clients_map, 0, 3); + + for (i = 0; i < dev->me_clients_num; i++) { + client_props = &dev->me_clients[i].props; + + if (!uuid_le_cmp(client_props->protocol_name, mei_amthif_guid)) + mei_amthif_host_init(dev); + else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid)) + mei_wd_host_init(dev); + } + + dev->dev_state = MEI_DEV_ENABLED; + + mutex_unlock(&dev->device_lock); +} + + +/** + * mei_cl_disconnect - disconnect host clinet form the me one + * + * @cl: host client + * + * Locking: called under "dev->device_lock" lock + * + * returns 0 on success, <0 on failure. + */ +int mei_cl_disconnect(struct mei_cl *cl) +{ + struct mei_device *dev; + struct mei_cl_cb *cb; + int rets, err; + + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + dev = cl->dev; + + if (cl->state != MEI_FILE_DISCONNECTING) + return 0; + + cb = mei_io_cb_init(cl, NULL); + if (!cb) + return -ENOMEM; + + cb->fop_type = MEI_FOP_CLOSE; + if (dev->mei_host_buffer_is_empty) { + dev->mei_host_buffer_is_empty = false; + if (mei_hbm_cl_disconnect_req(dev, cl)) { + rets = -ENODEV; + dev_err(&dev->pdev->dev, "failed to disconnect.\n"); + goto free; + } + mdelay(10); /* Wait for hardware disconnection ready */ + list_add_tail(&cb->list, &dev->ctrl_rd_list.list); + } else { + dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n"); + list_add_tail(&cb->list, &dev->ctrl_wr_list.list); + + } + mutex_unlock(&dev->device_lock); + + err = wait_event_timeout(dev->wait_recvd_msg, + MEI_FILE_DISCONNECTED == cl->state, + mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); + + 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_io_cb_free(cb); + return rets; +} + + +/** + * mei_cl_is_other_connecting - checks if other + * client with the same me client id is connecting + * + * @cl: private data of the file object + * + * returns ture if other client is connected, 0 - otherwise. + */ +bool mei_cl_is_other_connecting(struct mei_cl *cl) +{ + struct mei_device *dev; + struct mei_cl *pos; + struct mei_cl *next; + + if (WARN_ON(!cl || !cl->dev)) + return false; + + dev = cl->dev; + + list_for_each_entry_safe(pos, next, &dev->file_list, link) { + if ((pos->state == MEI_FILE_CONNECTING) && + (pos != cl) && cl->me_client_id == pos->me_client_id) + return true; + + } + + return false; +} + +/** + * mei_cl_connect - connect host clinet to the me one + * + * @cl: host client + * + * Locking: called under "dev->device_lock" lock + * + * returns 0 on success, <0 on failure. + */ +int mei_cl_connect(struct mei_cl *cl, struct file *file) +{ + struct mei_device *dev; + struct mei_cl_cb *cb; + long timeout = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT); + int rets; + + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + dev = cl->dev; + + cb = mei_io_cb_init(cl, file); + if (!cb) { + rets = -ENOMEM; + goto out; + } + + cb->fop_type = MEI_FOP_IOCTL; + + if (dev->mei_host_buffer_is_empty && + !mei_cl_is_other_connecting(cl)) { + dev->mei_host_buffer_is_empty = false; + + if (mei_hbm_cl_connect_req(dev, cl)) { + rets = -ENODEV; + goto out; + } + cl->timer_count = MEI_CONNECT_TIMEOUT; + list_add_tail(&cb->list, &dev->ctrl_rd_list.list); + } else { + list_add_tail(&cb->list, &dev->ctrl_wr_list.list); + } + + mutex_unlock(&dev->device_lock); + rets = wait_event_timeout(dev->wait_recvd_msg, + (cl->state == MEI_FILE_CONNECTED || + cl->state == MEI_FILE_DISCONNECTED), + timeout * HZ); + mutex_lock(&dev->device_lock); + + if (cl->state != MEI_FILE_CONNECTED) { + rets = -EFAULT; + + mei_io_list_flush(&dev->ctrl_rd_list, cl); + mei_io_list_flush(&dev->ctrl_wr_list, cl); + goto out; + } + + rets = cl->status; + +out: + mei_io_cb_free(cb); + return rets; +} + +/** + * mei_cl_flow_ctrl_creds - checks flow_control credits for cl. + * + * @dev: the device structure + * @cl: private data of the file object + * + * returns 1 if mei_flow_ctrl_creds >0, 0 - otherwise. + * -ENOENT if mei_cl is not present + * -EINVAL if single_recv_buf == 0 + */ +int mei_cl_flow_ctrl_creds(struct mei_cl *cl) +{ + struct mei_device *dev; + int i; + + if (WARN_ON(!cl || !cl->dev)) + return -EINVAL; + + dev = cl->dev; + + if (!dev->me_clients_num) + return 0; + + if (cl->mei_flow_ctrl_creds > 0) + return 1; + + for (i = 0; i < dev->me_clients_num; i++) { + struct mei_me_client *me_cl = &dev->me_clients[i]; + if (me_cl->client_id == cl->me_client_id) { + if (me_cl->mei_flow_ctrl_creds) { + if (WARN_ON(me_cl->props.single_recv_buf == 0)) + return -EINVAL; + return 1; + } else { + return 0; + } + } + } + return -ENOENT; +} + +/** + * mei_cl_flow_ctrl_reduce - reduces flow_control. + * + * @dev: the device structure + * @cl: private data of the file object + * @returns + * 0 on success + * -ENOENT when me client is not found + * -EINVAL when ctrl credits are <= 0 + */ +int mei_cl_flow_ctrl_reduce(struct mei_cl *cl) +{ + struct mei_device *dev; + int i; + + if (WARN_ON(!cl || !cl->dev)) + return -EINVAL; + + dev = cl->dev; + + if (!dev->me_clients_num) + return -ENOENT; + + for (i = 0; i < dev->me_clients_num; i++) { + struct mei_me_client *me_cl = &dev->me_clients[i]; + if (me_cl->client_id == cl->me_client_id) { + if (me_cl->props.single_recv_buf != 0) { + if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0)) + return -EINVAL; + dev->me_clients[i].mei_flow_ctrl_creds--; + } else { + if (WARN_ON(cl->mei_flow_ctrl_creds <= 0)) + return -EINVAL; + cl->mei_flow_ctrl_creds--; + } + return 0; + } + } + return -ENOENT; +} + +/** + * mei_cl_start_read - the start read client message function. + * + * @cl: host client + * + * returns 0 on success, <0 on failure. + */ +int mei_cl_read_start(struct mei_cl *cl) +{ + struct mei_device *dev; + struct mei_cl_cb *cb; + int rets; + int i; + + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + dev = cl->dev; + + if (cl->state != MEI_FILE_CONNECTED) + return -ENODEV; + + if (dev->dev_state != MEI_DEV_ENABLED) + return -ENODEV; + + if (cl->read_cb) { + dev_dbg(&dev->pdev->dev, "read is pending.\n"); + return -EBUSY; + } + i = mei_me_cl_by_id(dev, cl->me_client_id); + if (i < 0) { + dev_err(&dev->pdev->dev, "no such me client %d\n", + cl->me_client_id); + return -ENODEV; + } + + cb = mei_io_cb_init(cl, NULL); + if (!cb) + return -ENOMEM; + + rets = mei_io_cb_alloc_resp_buf(cb, + dev->me_clients[i].props.max_msg_length); + if (rets) + goto err; + + cb->fop_type = MEI_FOP_READ; + cl->read_cb = cb; + if (dev->mei_host_buffer_is_empty) { + dev->mei_host_buffer_is_empty = false; + if (mei_hbm_cl_flow_control_req(dev, cl)) { + rets = -ENODEV; + goto err; + } + list_add_tail(&cb->list, &dev->read_list.list); + } else { + list_add_tail(&cb->list, &dev->ctrl_wr_list.list); + } + return rets; +err: + mei_io_cb_free(cb); + return rets; +} + diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h new file mode 100644 index 000000000000..240a1f321342 --- /dev/null +++ b/drivers/misc/mei/client.h @@ -0,0 +1,97 @@ +/* + * + * 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. + * + */ + +#ifndef _MEI_CLIENT_H_ +#define _MEI_CLIENT_H_ + +#include <linux/types.h> +#include <linux/watchdog.h> +#include <linux/poll.h> +#include <linux/mei.h> + +#include "mei_dev.h" + +int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid); +int mei_me_cl_by_id(struct mei_device *dev, u8 client_id); + +/* + * MEI IO Functions + */ +struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp); +void mei_io_cb_free(struct mei_cl_cb *priv_cb); +int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length); +int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length); + + +/** + * mei_io_list_init - Sets up a queue list. + * + * @list: An instance cl callback structure + */ +static inline void mei_io_list_init(struct mei_cl_cb *list) +{ + INIT_LIST_HEAD(&list->list); +} +void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl); + +/* + * MEI Host Client Functions + */ + +struct mei_cl *mei_cl_allocate(struct mei_device *dev); +void mei_cl_init(struct mei_cl *cl, struct mei_device *dev); + + +int mei_cl_link(struct mei_cl *cl, int id); +int mei_cl_unlink(struct mei_cl *cl); + +int mei_cl_flush_queues(struct mei_cl *cl); +struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl); + +/** + * mei_cl_cmp_id - tells if file private data have same id + * + * @fe1: private data of 1. file object + * @fe2: private data of 2. file object + * + * returns true - if ids are the same and not NULL + */ +static inline bool mei_cl_cmp_id(const struct mei_cl *cl1, + const struct mei_cl *cl2) +{ + return cl1 && cl2 && + (cl1->host_client_id == cl2->host_client_id) && + (cl1->me_client_id == cl2->me_client_id); +} + + +int mei_cl_flow_ctrl_creds(struct mei_cl *cl); + +int mei_cl_flow_ctrl_reduce(struct mei_cl *cl); +/* + * MEI input output function prototype + */ +bool mei_cl_is_other_connecting(struct mei_cl *cl); +int mei_cl_disconnect(struct mei_cl *cl); + +int mei_cl_read_start(struct mei_cl *cl); + +int mei_cl_connect(struct mei_cl *cl, struct file *file); + +void mei_host_client_init(struct work_struct *work); + + +#endif /* _MEI_CLIENT_H_ */ diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c new file mode 100644 index 000000000000..fb9e63ba3bb1 --- /dev/null +++ b/drivers/misc/mei/hbm.c @@ -0,0 +1,669 @@ +/* + * + * 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/mei.h> + +#include "mei_dev.h" +#include "hbm.h" +#include "hw-me.h" + +/** + * mei_hbm_me_cl_allocate - allocates storage for me clients + * + * @dev: the device structure + * + * returns none. + */ +static void mei_hbm_me_cl_allocate(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; + + 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_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); + dev->dev_state = MEI_DEV_RESETING; + mei_reset(dev, 1); + return; + } + dev->me_clients = clients; + return; +} + +/** + * mei_hbm_cl_hdr - construct client hbm header + * @cl: - client + * @hbm_cmd: host bus message command + * @buf: buffer for cl header + * @len: buffer length + */ +static inline +void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) +{ + struct mei_hbm_cl_cmd *cmd = buf; + + memset(cmd, 0, len); + + cmd->hbm_cmd = hbm_cmd; + cmd->host_addr = cl->host_client_id; + cmd->me_addr = cl->me_client_id; +} + +/** + * same_disconn_addr - tells if they have the same address + * + * @file: private data of the file object. + * @disconn: disconnection request. + * + * returns true if addres are same + */ +static inline +bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) +{ + struct mei_hbm_cl_cmd *cmd = buf; + return cl->host_client_id == cmd->host_addr && + cl->me_client_id == cmd->me_addr; +} + + +/** + * 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 (mei_hbm_cl_addr_equal(cl, rs)) { + 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_hbm_start_req - sends start request message. + * + * @dev: the device structure + */ +void mei_hbm_start_req(struct mei_device *dev) +{ + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; + struct hbm_host_version_request *start_req; + const size_t len = sizeof(struct hbm_host_version_request); + + mei_hbm_hdr(mei_hdr, len); + + /* host start message */ + start_req = (struct hbm_host_version_request *)dev->wr_msg.data; + memset(start_req, 0, len); + start_req->hbm_cmd = HOST_START_REQ_CMD; + start_req->host_version.major_version = HBM_MAJOR_VERSION; + start_req->host_version.minor_version = HBM_MINOR_VERSION; + + dev->recvd_msg = false; + if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { + dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); + dev->dev_state = MEI_DEV_RESETING; + mei_reset(dev, 1); + } + dev->init_clients_state = MEI_START_MESSAGE; + dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; + return ; +} + +/** + * mei_hbm_enum_clients_req - sends enumeration client request message. + * + * @dev: the device structure + * + * returns none. + */ +static void mei_hbm_enum_clients_req(struct mei_device *dev) +{ + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; + struct hbm_host_enum_request *enum_req; + const size_t len = sizeof(struct hbm_host_enum_request); + /* enumerate clients */ + mei_hbm_hdr(mei_hdr, len); + + enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; + memset(enum_req, 0, len); + enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; + + if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { + dev->dev_state = MEI_DEV_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 = MEI_CLIENTS_INIT_TIMEOUT; + return; +} + +/** + * mei_hbm_prop_requsest - request property for a single client + * + * @dev: the device structure + * + * returns none. + */ + +static int mei_hbm_prop_req(struct mei_device *dev) +{ + + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; + struct hbm_props_request *prop_req; + const size_t len = sizeof(struct hbm_props_request); + unsigned long next_client_index; + u8 client_num; + + + client_num = dev->me_client_presentation_num; + + next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, + dev->me_client_index); + + /* We got all client properties */ + if (next_client_index == MEI_CLIENTS_MAX) { + schedule_work(&dev->init_work); + + return 0; + } + + dev->me_clients[client_num].client_id = next_client_index; + dev->me_clients[client_num].mei_flow_ctrl_creds = 0; + + mei_hbm_hdr(mei_hdr, len); + prop_req = (struct hbm_props_request *)dev->wr_msg.data; + + memset(prop_req, 0, sizeof(struct hbm_props_request)); + + + prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; + prop_req->address = next_client_index; + + if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { + dev->dev_state = MEI_DEV_RESETING; + dev_err(&dev->pdev->dev, "Properties request command failed\n"); + mei_reset(dev, 1); + + return -EIO; + } + + dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; + dev->me_client_index = next_client_index; + + return 0; +} + +/** + * mei_hbm_stop_req_prepare - perpare stop request message + * + * @dev - mei device + * @mei_hdr - mei message header + * @data - hbm message body buffer + */ +static void mei_hbm_stop_req_prepare(struct mei_device *dev, + struct mei_msg_hdr *mei_hdr, unsigned char *data) +{ + struct hbm_host_stop_request *req = + (struct hbm_host_stop_request *)data; + const size_t len = sizeof(struct hbm_host_stop_request); + + mei_hbm_hdr(mei_hdr, len); + + memset(req, 0, len); + req->hbm_cmd = HOST_STOP_REQ_CMD; + req->reason = DRIVER_STOP_REQUEST; +} + +/** + * mei_hbm_cl_flow_control_req - sends flow control requst. + * + * @dev: the device structure + * @cl: client info + * + * This function returns -EIO on write failure + */ +int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) +{ + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; + const size_t len = sizeof(struct hbm_flow_control); + + mei_hbm_hdr(mei_hdr, len); + mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len); + + dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n", + cl->host_client_id, cl->me_client_id); + + return mei_write_message(dev, mei_hdr, dev->wr_msg.data); +} + +/** + * add_single_flow_creds - adds single buffer credentials. + * + * @file: private data ot the file object. + * @flow: flow control. + */ +static void mei_hbm_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_hbm_cl_flow_control_res - flow control response from me + * + * @dev: the device structure + * @flow_control: flow control response bus message + */ +static void mei_hbm_cl_flow_control_res(struct mei_device *dev, + struct hbm_flow_control *flow_control) +{ + struct mei_cl *cl = NULL; + struct mei_cl *next = NULL; + + if (!flow_control->host_addr) { + /* single receive buffer */ + mei_hbm_add_single_flow_creds(dev, flow_control); + return; + } + + /* normal connection */ + list_for_each_entry_safe(cl, next, &dev->file_list, link) { + if (mei_hbm_cl_addr_equal(cl, flow_control)) { + cl->mei_flow_ctrl_creds++; + dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", + flow_control->host_addr, flow_control->me_addr); + dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", + cl->mei_flow_ctrl_creds); + break; + } + } +} + + +/** + * mei_hbm_cl_disconnect_req - sends disconnect message to fw. + * + * @dev: the device structure + * @cl: a client to disconnect from + * + * This function returns -EIO on write failure + */ +int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) +{ + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; + const size_t len = sizeof(struct hbm_client_connect_request); + + mei_hbm_hdr(mei_hdr, len); + mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len); + + return mei_write_message(dev, mei_hdr, dev->wr_msg.data); +} + +/** + * mei_hbm_cl_disconnect_res - disconnect response from ME + * + * @dev: the device structure + * @rs: disconnect response bus message + */ +static void mei_hbm_cl_disconnect_res(struct mei_device *dev, + struct hbm_client_connect_response *rs) +{ + struct mei_cl *cl; + struct mei_cl_cb *pos = NULL, *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(pos, next, &dev->ctrl_rd_list.list, list) { + cl = pos->cl; + + if (!cl) { + list_del(&pos->list); + return; + } + + dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); + if (mei_hbm_cl_addr_equal(cl, rs)) { + list_del(&pos->list); + if (!rs->status) + cl->state = MEI_FILE_DISCONNECTED; + + cl->status = 0; + cl->timer_count = 0; + break; + } + } +} + +/** + * mei_hbm_cl_connect_req - send connection request to specific me client + * + * @dev: the device structure + * @cl: a client to connect to + * + * returns -EIO on write failure + */ +int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) +{ + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; + const size_t len = sizeof(struct hbm_client_connect_request); + + mei_hbm_hdr(mei_hdr, len); + mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len); + + return mei_write_message(dev, mei_hdr, dev->wr_msg.data); +} + +/** + * mei_hbm_cl_connect_res - connect resposne from the ME + * + * @dev: the device structure + * @rs: connect response bus message + */ +static void mei_hbm_cl_connect_res(struct mei_device *dev, + struct hbm_client_connect_response *rs) +{ + + struct mei_cl *cl; + struct mei_cl_cb *pos = NULL, *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); + + return; + } + + if (is_treat_specially_client(&dev->iamthif_cl, rs)) { + dev->iamthif_state = MEI_IAMTHIF_IDLE; + return; + } + list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { + + cl = pos->cl; + if (!cl) { + list_del(&pos->list); + return; + } + if (pos->fop_type == MEI_FOP_IOCTL) { + if (is_treat_specially_client(cl, rs)) { + list_del(&pos->list); + cl->status = 0; + cl->timer_count = 0; + break; + } + } + } +} + + +/** + * mei_client_disconnect_request - disconnect request initiated by me + * host sends disoconnect response + * + * @dev: the device structure. + * @disconnect_req: disconnect request bus message from the me + */ +static void mei_hbm_fw_disconnect_req(struct mei_device *dev, + struct hbm_client_connect_request *disconnect_req) +{ + struct mei_cl *cl, *next; + const size_t len = sizeof(struct hbm_client_connect_response); + + list_for_each_entry_safe(cl, next, &dev->file_list, link) { + if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { + dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", + disconnect_req->host_addr, + disconnect_req->me_addr); + cl->state = MEI_FILE_DISCONNECTED; + cl->timer_count = 0; + if (cl == &dev->wd_cl) + dev->wd_pending = false; + else if (cl == &dev->iamthif_cl) + dev->iamthif_timer = 0; + + /* prepare disconnect response */ + mei_hbm_hdr(&dev->wr_ext_msg.hdr, len); + mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, + dev->wr_ext_msg.data, len); + break; + } + } +} + + +/** + * mei_hbm_dispatch - bottom half read routine after ISR to + * handle the read bus message cmd processing. + * + * @dev: the device structure + * @mei_hdr: header of bus message + */ +void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) +{ + struct mei_bus_message *mei_msg; + struct mei_me_client *me_client; + struct hbm_host_version_response *version_res; + struct hbm_client_connect_response *connect_res; + struct hbm_client_connect_response *disconnect_res; + struct hbm_client_connect_request *disconnect_req; + struct hbm_flow_control *flow_control; + struct hbm_props_response *props_res; + struct hbm_host_enum_response *enum_res; + + /* read the message to our buffer */ + BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); + mei_read_slots(dev, dev->rd_msg_buf, hdr->length); + mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; + + switch (mei_msg->hbm_cmd) { + case HOST_START_RES_CMD: + version_res = (struct hbm_host_version_response *)mei_msg; + if (!version_res->host_version_supported) { + dev->version = version_res->me_max_version; + dev_dbg(&dev->pdev->dev, "version mismatch.\n"); + + mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr, + dev->wr_msg.data); + mei_write_message(dev, &dev->wr_msg.hdr, + dev->wr_msg.data); + return; + } + + dev->version.major_version = HBM_MAJOR_VERSION; + dev->version.minor_version = HBM_MINOR_VERSION; + if (dev->dev_state == MEI_DEV_INIT_CLIENTS && + dev->init_clients_state == MEI_START_MESSAGE) { + dev->init_clients_timer = 0; + mei_hbm_enum_clients_req(dev); + } else { + dev->recvd_msg = false; + dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n"); + mei_reset(dev, 1); + 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_hbm_cl_connect_res(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_hbm_cl_disconnect_res(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_hbm_cl_flow_control_res(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; + me_client = &dev->me_clients[dev->me_client_presentation_num]; + + 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 (me_client->client_id != props_res->address) { + dev_err(&dev->pdev->dev, + "Host client properties reply mismatch\n"); + mei_reset(dev, 1); + + return; + } + + if (dev->dev_state != MEI_DEV_INIT_CLIENTS || + dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) { + dev_err(&dev->pdev->dev, + "Unexpected client properties reply\n"); + mei_reset(dev, 1); + + return; + } + + me_client->props = props_res->client_properties; + dev->me_client_index++; + dev->me_client_presentation_num++; + + /* request property for the next client */ + mei_hbm_prop_req(dev); + + 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->dev_state == MEI_DEV_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_hbm_me_cl_allocate(dev); + dev->init_clients_state = + MEI_CLIENT_PROPERTIES_MESSAGE; + + /* first property reqeust */ + mei_hbm_prop_req(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->dev_state = MEI_DEV_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_connect_request *)mei_msg; + mei_hbm_fw_disconnect_req(dev, disconnect_req); + break; + + case ME_STOP_REQ_CMD: + + mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr, + dev->wr_ext_msg.data); + break; + default: + BUG(); + break; + + } +} + diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h new file mode 100644 index 000000000000..b552afbaf85c --- /dev/null +++ b/drivers/misc/mei/hbm.h @@ -0,0 +1,39 @@ +/* + * + * 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. + * + */ + +#ifndef _MEI_HBM_H_ +#define _MEI_HBM_H_ + +void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr); + +static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length) +{ + hdr->host_addr = 0; + hdr->me_addr = 0; + hdr->length = length; + hdr->msg_complete = 1; + hdr->reserved = 0; +} + +void mei_hbm_start_req(struct mei_device *dev); + +int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl); +int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl); +int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl); + + +#endif /* _MEI_HBM_H_ */ + diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h new file mode 100644 index 000000000000..6a203b6e8346 --- /dev/null +++ b/drivers/misc/mei/hw-me-regs.h @@ -0,0 +1,167 @@ +/****************************************************************************** + * Intel Management Engine Interface (Intel MEI) Linux driver + * Intel MEI Interface Header + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, + * USA + * + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * Contact Information: + * Intel Corporation. + * linux-mei@linux.intel.com + * http://www.intel.com + * + * BSD LICENSE + * + * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 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 MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * 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 DAMAGE. + * + *****************************************************************************/ +#ifndef _MEI_HW_MEI_REGS_H_ +#define _MEI_HW_MEI_REGS_H_ + +/* + * MEI device IDs + */ +#define MEI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */ +#define MEI_DEV_ID_82G35 0x2984 /* 82G35 Express */ +#define MEI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */ +#define MEI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */ + +#define MEI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */ +#define MEI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */ + +#define MEI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */ +#define MEI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */ +#define MEI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */ +#define MEI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */ +#define MEI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */ + +#define MEI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */ +#define MEI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */ +#define MEI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */ +#define MEI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */ +#define MEI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */ + +#define MEI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */ +#define MEI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */ +#define MEI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */ +#define MEI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */ + +#define MEI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */ +#define MEI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */ +#define MEI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */ +#define MEI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */ + +#define MEI_DEV_ID_IBXPK_1 0x3B64 /* Calpella */ +#define MEI_DEV_ID_IBXPK_2 0x3B65 /* Calpella */ + +#define MEI_DEV_ID_CPT_1 0x1C3A /* Couger Point */ +#define MEI_DEV_ID_PBG_1 0x1D3A /* C600/X79 Patsburg */ + +#define MEI_DEV_ID_PPT_1 0x1E3A /* Panther Point */ +#define MEI_DEV_ID_PPT_2 0x1CBA /* Panther Point */ +#define MEI_DEV_ID_PPT_3 0x1DBA /* Panther Point */ + +#define MEI_DEV_ID_LPT 0x8C3A /* Lynx Point */ +#define MEI_DEV_ID_LPT_LP 0x9C3A /* Lynx Point LP */ +/* + * MEI HW Section + */ + +/* MEI registers */ +/* H_CB_WW - Host Circular Buffer (CB) Write Window register */ +#define H_CB_WW 0 +/* H_CSR - Host Control Status register */ +#define H_CSR 4 +/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */ +#define ME_CB_RW 8 +/* ME_CSR_HA - ME Control Status Host Access register (read only) */ +#define ME_CSR_HA 0xC + + +/* register bits of H_CSR (Host Control Status register) */ +/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */ +#define H_CBD 0xFF000000 +/* Host Circular Buffer Write Pointer */ +#define H_CBWP 0x00FF0000 +/* Host Circular Buffer Read Pointer */ +#define H_CBRP 0x0000FF00 +/* Host Reset */ +#define H_RST 0x00000010 +/* Host Ready */ +#define H_RDY 0x00000008 +/* Host Interrupt Generate */ +#define H_IG 0x00000004 +/* Host Interrupt Status */ +#define H_IS 0x00000002 +/* Host Interrupt Enable */ +#define H_IE 0x00000001 + + +/* register bits of ME_CSR_HA (ME Control Status Host Access register) */ +/* ME CB (Circular Buffer) Depth HRA (Host Read Access) - host read only +access to ME_CBD */ +#define ME_CBD_HRA 0xFF000000 +/* ME CB Write Pointer HRA - host read only access to ME_CBWP */ +#define ME_CBWP_HRA 0x00FF0000 +/* ME CB Read Pointer HRA - host read only access to ME_CBRP */ +#define ME_CBRP_HRA 0x0000FF00 +/* ME Reset HRA - host read only access to ME_RST */ +#define ME_RST_HRA 0x00000010 +/* ME Ready HRA - host read only access to ME_RDY */ +#define ME_RDY_HRA 0x00000008 +/* ME Interrupt Generate HRA - host read only access to ME_IG */ +#define ME_IG_HRA 0x00000004 +/* ME Interrupt Status HRA - host read only access to ME_IS */ +#define ME_IS_HRA 0x00000002 +/* ME Interrupt Enable HRA - host read only access to ME_IE */ +#define ME_IE_HRA 0x00000001 + +#endif /* _MEI_HW_MEI_REGS_H_ */ diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c new file mode 100644 index 000000000000..94b203ec9b1f --- /dev/null +++ b/drivers/misc/mei/hw-me.c @@ -0,0 +1,386 @@ +/* + * + * 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/mei.h> + +#include "mei_dev.h" +#include "hw-me.h" + +/** + * mei_reg_read - Reads 32bit data from the mei device + * + * @dev: the device structure + * @offset: offset from which to read the data + * + * returns register value (u32) + */ +static inline u32 mei_reg_read(const struct mei_device *dev, + unsigned long offset) +{ + return ioread32(dev->mem_addr + offset); +} + + +/** + * mei_reg_write - Writes 32bit data to the mei device + * + * @dev: the device structure + * @offset: offset from which to write the data + * @value: register value to write (u32) + */ +static inline void mei_reg_write(const struct mei_device *dev, + unsigned long offset, u32 value) +{ + iowrite32(value, dev->mem_addr + offset); +} + +/** + * mei_mecbrw_read - Reads 32bit data from ME circular buffer + * read window register + * + * @dev: the device structure + * + * returns ME_CB_RW register value (u32) + */ +u32 mei_mecbrw_read(const struct mei_device *dev) +{ + return mei_reg_read(dev, ME_CB_RW); +} +/** + * mei_mecsr_read - Reads 32bit data from the ME CSR + * + * @dev: the device structure + * + * returns ME_CSR_HA register value (u32) + */ +static inline u32 mei_mecsr_read(const struct mei_device *dev) +{ + return mei_reg_read(dev, ME_CSR_HA); +} + +/** + * mei_hcsr_read - Reads 32bit data from the host CSR + * + * @dev: the device structure + * + * returns H_CSR register value (u32) + */ +static inline u32 mei_hcsr_read(const struct mei_device *dev) +{ + return mei_reg_read(dev, H_CSR); +} + +/** + * mei_hcsr_set - writes H_CSR register to the mei device, + * and ignores the H_IS bit for it is write-one-to-zero. + * + * @dev: the device structure + */ +static inline void mei_hcsr_set(struct mei_device *dev, u32 hcsr) +{ + hcsr &= ~H_IS; + mei_reg_write(dev, H_CSR, hcsr); +} + + +/** + * me_hw_config - configure hw dependent settings + * + * @dev: mei device + */ +void mei_hw_config(struct mei_device *dev) +{ + u32 hcsr = mei_hcsr_read(dev); + /* Doesn't change in runtime */ + dev->hbuf_depth = (hcsr & H_CBD) >> 24; +} +/** + * mei_clear_interrupts - clear and stop interrupts + * + * @dev: the device structure + */ +void mei_clear_interrupts(struct mei_device *dev) +{ + u32 hcsr = mei_hcsr_read(dev); + if ((hcsr & H_IS) == H_IS) + mei_reg_write(dev, H_CSR, hcsr); +} + +/** + * mei_enable_interrupts - enables mei device interrupts + * + * @dev: the device structure + */ +void mei_enable_interrupts(struct mei_device *dev) +{ + u32 hcsr = mei_hcsr_read(dev); + hcsr |= H_IE; + mei_hcsr_set(dev, hcsr); +} + +/** + * mei_disable_interrupts - disables mei device interrupts + * + * @dev: the device structure + */ +void mei_disable_interrupts(struct mei_device *dev) +{ + u32 hcsr = mei_hcsr_read(dev); + hcsr &= ~H_IE; + mei_hcsr_set(dev, hcsr); +} + +/** + * mei_hw_reset - resets fw via mei csr register. + * + * @dev: the device structure + * @interrupts_enabled: if interrupt should be enabled after reset. + */ +void mei_hw_reset(struct mei_device *dev, bool intr_enable) +{ + u32 hcsr = mei_hcsr_read(dev); + + dev_dbg(&dev->pdev->dev, "before reset HCSR = 0x%08x.\n", hcsr); + + hcsr |= (H_RST | H_IG); + + if (intr_enable) + hcsr |= H_IE; + else + hcsr &= ~H_IE; + + mei_hcsr_set(dev, hcsr); + + hcsr = mei_hcsr_read(dev) | H_IG; + hcsr &= ~H_RST; + + mei_hcsr_set(dev, hcsr); + + hcsr = mei_hcsr_read(dev); + + dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", hcsr); +} + +/** + * mei_host_set_ready - enable device + * + * @dev - mei device + * returns bool + */ + +void mei_host_set_ready(struct mei_device *dev) +{ + dev->host_hw_state |= H_IE | H_IG | H_RDY; + mei_hcsr_set(dev, dev->host_hw_state); +} +/** + * mei_host_is_ready - check whether the host has turned ready + * + * @dev - mei device + * returns bool + */ +bool mei_host_is_ready(struct mei_device *dev) +{ + dev->host_hw_state = mei_hcsr_read(dev); + return (dev->host_hw_state & H_RDY) == H_RDY; +} + +/** + * mei_me_is_ready - check whether the me has turned ready + * + * @dev - mei device + * returns bool + */ +bool mei_me_is_ready(struct mei_device *dev) +{ + dev->me_hw_state = mei_mecsr_read(dev); + return (dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA; +} + +/** + * 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_hbuf_filled_slots - gets number of device filled buffer slots + * + * @dev: the device structure + * + * returns number of filled slots + */ +static unsigned char mei_hbuf_filled_slots(struct mei_device *dev) +{ + char read_ptr, write_ptr; + + dev->host_hw_state = mei_hcsr_read(dev); + + read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8); + write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16); + + return (unsigned char) (write_ptr - read_ptr); +} + +/** + * mei_hbuf_is_empty - checks if host buffer is empty. + * + * @dev: the device structure + * + * returns true if empty, false - otherwise. + */ +bool mei_hbuf_is_empty(struct mei_device *dev) +{ + return mei_hbuf_filled_slots(dev) == 0; +} + +/** + * mei_hbuf_empty_slots - counts write empty slots. + * + * @dev: the device structure + * + * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count + */ +int mei_hbuf_empty_slots(struct mei_device *dev) +{ + unsigned char filled_slots, empty_slots; + + filled_slots = mei_hbuf_filled_slots(dev); + empty_slots = dev->hbuf_depth - filled_slots; + + /* check for overflow */ + if (filled_slots > dev->hbuf_depth) + return -EOVERFLOW; + + return empty_slots; +} + +/** + * mei_write_message - writes a message to mei device. + * + * @dev: the device structure + * @header: mei HECI header of message + * @buf: message payload will be written + * + * This function returns -EIO if write has failed + */ +int mei_write_message(struct mei_device *dev, struct mei_msg_hdr *header, + unsigned char *buf) +{ + unsigned long rem, dw_cnt; + unsigned long length = header->length; + u32 *reg_buf = (u32 *)buf; + u32 hcsr; + int i; + int empty_slots; + + dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(header)); + + empty_slots = mei_hbuf_empty_slots(dev); + dev_dbg(&dev->pdev->dev, "empty slots = %hu.\n", empty_slots); + + dw_cnt = mei_data2slots(length); + if (empty_slots < 0 || dw_cnt > empty_slots) + return -EIO; + + mei_reg_write(dev, H_CB_WW, *((u32 *) header)); + + for (i = 0; i < length / 4; i++) + mei_reg_write(dev, H_CB_WW, reg_buf[i]); + + rem = length & 0x3; + if (rem > 0) { + u32 reg = 0; + memcpy(®, &buf[length - rem], rem); + mei_reg_write(dev, H_CB_WW, reg); + } + + hcsr = mei_hcsr_read(dev) | H_IG; + mei_hcsr_set(dev, hcsr); + if (!mei_me_is_ready(dev)) + return -EIO; + + return 0; +} + +/** + * mei_count_full_read_slots - counts read full slots. + * + * @dev: the device structure + * + * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count + */ +int mei_count_full_read_slots(struct mei_device *dev) +{ + char read_ptr, write_ptr; + unsigned char buffer_depth, filled_slots; + + dev->me_hw_state = mei_mecsr_read(dev); + buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24); + read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8); + write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16); + filled_slots = (unsigned char) (write_ptr - read_ptr); + + /* check for overflow */ + if (filled_slots > buffer_depth) + return -EOVERFLOW; + + dev_dbg(&dev->pdev->dev, "filled_slots =%08x\n", filled_slots); + return (int)filled_slots; +} + +/** + * mei_read_slots - reads a message from mei device. + * + * @dev: the device structure + * @buffer: message buffer will be written + * @buffer_length: message size will be read + */ +void mei_read_slots(struct mei_device *dev, unsigned char *buffer, + unsigned long buffer_length) +{ + u32 *reg_buf = (u32 *)buffer; + u32 hcsr; + + for (; buffer_length >= sizeof(u32); buffer_length -= sizeof(u32)) + *reg_buf++ = mei_mecbrw_read(dev); + + if (buffer_length > 0) { + u32 reg = mei_mecbrw_read(dev); + memcpy(reg_buf, ®, buffer_length); + } + + hcsr = mei_hcsr_read(dev) | H_IG; + mei_hcsr_set(dev, hcsr); +} + diff --git a/drivers/misc/mei/interface.h b/drivers/misc/mei/hw-me.h index ec6c785a3961..73bef545e4d5 100644 --- a/drivers/misc/mei/interface.h +++ b/drivers/misc/mei/hw-me.h @@ -29,9 +29,8 @@ void mei_read_slots(struct mei_device *dev, unsigned long buffer_length); int mei_write_message(struct mei_device *dev, - struct mei_msg_hdr *header, - unsigned char *write_buffer, - unsigned long write_length); + struct mei_msg_hdr *header, + unsigned char *buf); bool mei_hbuf_is_empty(struct mei_device *dev); @@ -50,32 +49,4 @@ static inline unsigned char mei_data2slots(size_t length) int mei_count_full_read_slots(struct mei_device *dev); - -int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl); - - - -int mei_wd_send(struct mei_device *dev); -int mei_wd_stop(struct mei_device *dev); -int mei_wd_host_init(struct mei_device *dev); -/* - * mei_watchdog_register - Registering watchdog interface - * once we got connection to the WD Client - * @dev - mei device - */ -void mei_watchdog_register(struct mei_device *dev); -/* - * mei_watchdog_unregister - Unregistering watchdog interface - * @dev - mei device - */ -void mei_watchdog_unregister(struct mei_device *dev); - -int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl); - -int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl); - -int mei_disconnect(struct mei_device *dev, struct mei_cl *cl); -int mei_other_client_is_connecting(struct mei_device *dev, struct mei_cl *cl); -int mei_connect(struct mei_device *dev, struct mei_cl *cl); - #endif /* _MEI_INTERFACE_H_ */ diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h index be8ca6b333ca..cb2f556b4252 100644 --- a/drivers/misc/mei/hw.h +++ b/drivers/misc/mei/hw.h @@ -31,109 +31,6 @@ #define MEI_IAMTHIF_STALL_TIMER 12 /* HPS */ #define MEI_IAMTHIF_READ_TIMER 10 /* HPS */ -/* - * Internal Clients Number - */ -#define MEI_WD_HOST_CLIENT_ID 1 -#define MEI_IAMTHIF_HOST_CLIENT_ID 2 - -/* - * MEI device IDs - */ -#define MEI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */ -#define MEI_DEV_ID_82G35 0x2984 /* 82G35 Express */ -#define MEI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */ -#define MEI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */ - -#define MEI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */ -#define MEI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */ - -#define MEI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */ -#define MEI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */ -#define MEI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */ -#define MEI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */ -#define MEI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */ - -#define MEI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */ -#define MEI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */ -#define MEI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */ -#define MEI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */ -#define MEI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */ - -#define MEI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */ -#define MEI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */ -#define MEI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */ -#define MEI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */ - -#define MEI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */ -#define MEI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */ -#define MEI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */ -#define MEI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */ - -#define MEI_DEV_ID_IBXPK_1 0x3B64 /* Calpella */ -#define MEI_DEV_ID_IBXPK_2 0x3B65 /* Calpella */ - -#define MEI_DEV_ID_CPT_1 0x1C3A /* Couger Point */ -#define MEI_DEV_ID_PBG_1 0x1D3A /* C600/X79 Patsburg */ - -#define MEI_DEV_ID_PPT_1 0x1E3A /* Panther Point */ -#define MEI_DEV_ID_PPT_2 0x1CBA /* Panther Point */ -#define MEI_DEV_ID_PPT_3 0x1DBA /* Panther Point */ - -#define MEI_DEV_ID_LPT 0x8C3A /* Lynx Point */ -#define MEI_DEV_ID_LPT_LP 0x9C3A /* Lynx Point LP */ -/* - * MEI HW Section - */ - -/* MEI registers */ -/* H_CB_WW - Host Circular Buffer (CB) Write Window register */ -#define H_CB_WW 0 -/* H_CSR - Host Control Status register */ -#define H_CSR 4 -/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */ -#define ME_CB_RW 8 -/* ME_CSR_HA - ME Control Status Host Access register (read only) */ -#define ME_CSR_HA 0xC - - -/* register bits of H_CSR (Host Control Status register) */ -/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */ -#define H_CBD 0xFF000000 -/* Host Circular Buffer Write Pointer */ -#define H_CBWP 0x00FF0000 -/* Host Circular Buffer Read Pointer */ -#define H_CBRP 0x0000FF00 -/* Host Reset */ -#define H_RST 0x00000010 -/* Host Ready */ -#define H_RDY 0x00000008 -/* Host Interrupt Generate */ -#define H_IG 0x00000004 -/* Host Interrupt Status */ -#define H_IS 0x00000002 -/* Host Interrupt Enable */ -#define H_IE 0x00000001 - - -/* register bits of ME_CSR_HA (ME Control Status Host Access register) */ -/* ME CB (Circular Buffer) Depth HRA (Host Read Access) - host read only -access to ME_CBD */ -#define ME_CBD_HRA 0xFF000000 -/* ME CB Write Pointer HRA - host read only access to ME_CBWP */ -#define ME_CBWP_HRA 0x00FF0000 -/* ME CB Read Pointer HRA - host read only access to ME_CBRP */ -#define ME_CBRP_HRA 0x0000FF00 -/* ME Reset HRA - host read only access to ME_RST */ -#define ME_RST_HRA 0x00000010 -/* ME Ready HRA - host read only access to ME_RDY */ -#define ME_RDY_HRA 0x00000008 -/* ME Interrupt Generate HRA - host read only access to ME_IG */ -#define ME_IG_HRA 0x00000004 -/* ME Interrupt Status HRA - host read only access to ME_IS */ -#define ME_IS_HRA 0x00000002 -/* ME Interrupt Enable HRA - host read only access to ME_IE */ -#define ME_IE_HRA 0x00000001 /* * MEI Version @@ -224,6 +121,22 @@ struct mei_bus_message { u8 data[0]; } __packed; +/** + * struct hbm_cl_cmd - client specific host bus command + * CONNECT, DISCONNECT, and FlOW CONTROL + * + * @hbm_cmd - bus message command header + * @me_addr - address of the client in ME + * @host_addr - address of the client in the driver + * @data + */ +struct mei_hbm_cl_cmd { + u8 hbm_cmd; + u8 me_addr; + u8 host_addr; + u8 data; +}; + struct hbm_version { u8 minor_version; u8 major_version; @@ -333,11 +246,5 @@ struct hbm_flow_control { u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH]; } __packed; -struct mei_me_client { - struct mei_client_properties props; - u8 client_id; - u8 mei_flow_ctrl_creds; -} __packed; - #endif diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index a54cd5567ca2..5d08db5b314e 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -19,11 +19,11 @@ #include <linux/wait.h> #include <linux/delay.h> -#include "mei_dev.h" -#include "hw.h" -#include "interface.h" #include <linux/mei.h> +#include "mei_dev.h" +#include "client.h" + const char *mei_dev_state_str(int state) { #define MEI_DEV_STATE(state) case MEI_DEV_##state: return #state @@ -44,47 +44,6 @@ const char *mei_dev_state_str(int state) -/** - * 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_cl_cb *list, struct mei_cl *cl) -{ - struct mei_cl_cb *pos; - struct mei_cl_cb *next; - - list_for_each_entry_safe(pos, next, &list->list, list) { - if (pos->cl) { - if (mei_cl_cmp_id(cl, pos->cl)) - list_del(&pos->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->amthif_cmd_list, cl); - mei_io_list_flush(&cl->dev->amthif_rd_complete_list, cl); - return 0; -} - - /** * init_mei_device - allocates and initializes the mei device structure @@ -109,7 +68,6 @@ struct mei_device *mei_device_init(struct pci_dev *pdev) init_waitqueue_head(&dev->wait_recvd_msg); init_waitqueue_head(&dev->wait_stop_wd); dev->dev_state = MEI_DEV_INITIALIZING; - dev->iamthif_state = MEI_IAMTHIF_IDLE; mei_io_list_init(&dev->read_list); mei_io_list_init(&dev->write_list); @@ -118,6 +76,10 @@ struct mei_device *mei_device_init(struct pci_dev *pdev) mei_io_list_init(&dev->ctrl_rd_list); mei_io_list_init(&dev->amthif_cmd_list); mei_io_list_init(&dev->amthif_rd_complete_list); + + INIT_DELAYED_WORK(&dev->timer_work, mei_timer); + INIT_WORK(&dev->init_work, mei_host_client_init); + dev->pdev = pdev; return dev; } @@ -131,101 +93,64 @@ struct mei_device *mei_device_init(struct pci_dev *pdev) */ int mei_hw_init(struct mei_device *dev) { - int err = 0; - int ret; + int ret = 0; 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); + mei_clear_interrupts(dev); - /* Doesn't change in runtime */ - dev->hbuf_depth = (dev->host_hw_state & H_CBD) >> 24; + mei_hw_config(dev); 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, + ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, dev->recvd_msg, mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT)); mutex_lock(&dev->device_lock); } - if (err <= 0 && !dev->recvd_msg) { + if (ret <= 0 && !dev->recvd_msg) { dev->dev_state = MEI_DEV_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; + goto err; } - if (!(((dev->host_hw_state & H_RDY) == H_RDY) && - ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) { - dev->dev_state = MEI_DEV_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"); + if (!mei_host_is_ready(dev)) { + dev_err(&dev->pdev->dev, "host is not ready.\n"); + goto err; + } - dev_err(&dev->pdev->dev, "link layer initialization failed.\n"); - ret = -ENODEV; - goto out; + if (!mei_me_is_ready(dev)) { + dev_err(&dev->pdev->dev, "ME is not ready.\n"); + goto err; } 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; + goto err; } 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); + return 0; +err: + dev_err(&dev->pdev->dev, "link layer initialization failed.\n"); + dev->dev_state = MEI_DEV_DISABLED; + mutex_unlock(&dev->device_lock); + return -ENODEV; } /** @@ -242,32 +167,16 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) struct mei_cl_cb *cb_next = NULL; bool unexpected; - if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) { - dev->need_reset = true; + if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) return; - } unexpected = (dev->dev_state != MEI_DEV_INITIALIZING && dev->dev_state != MEI_DEV_DISABLED && dev->dev_state != MEI_DEV_POWER_DOWN && dev->dev_state != MEI_DEV_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->dev_state != MEI_DEV_INITIALIZING) { if (dev->dev_state != MEI_DEV_DISABLED && @@ -283,9 +192,12 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) } /* remove entry if already in list */ dev_dbg(&dev->pdev->dev, "remove iamthif and wd from the file list.\n"); - mei_me_cl_unlink(dev, &dev->wd_cl); - - mei_me_cl_unlink(dev, &dev->iamthif_cl); + mei_cl_unlink(&dev->wd_cl); + if (dev->open_handle_count > 0) + dev->open_handle_count--; + mei_cl_unlink(&dev->iamthif_cl); + if (dev->open_handle_count > 0) + dev->open_handle_count--; mei_amthif_reset_params(dev); memset(&dev->wr_ext_msg, 0, sizeof(dev->wr_ext_msg)); @@ -295,13 +207,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev->rd_msg_hdr = 0; 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: dev_state = %s\n", mei_dev_state_str(dev->dev_state)); @@ -322,365 +227,4 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) -/** - * 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 *start_req; - const size_t len = sizeof(struct hbm_host_version_request); - - mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len); - - /* host start message */ - start_req = (struct hbm_host_version_request *)&dev->wr_msg_buf[1]; - memset(start_req, 0, len); - start_req->hbm_cmd = HOST_START_REQ_CMD; - start_req->host_version.major_version = HBM_MAJOR_VERSION; - start_req->host_version.minor_version = HBM_MINOR_VERSION; - - dev->recvd_msg = false; - if (mei_write_message(dev, mei_hdr, (unsigned char *)start_req, len)) { - dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); - dev->dev_state = MEI_DEV_RESETING; - mei_reset(dev, 1); - } - dev->init_clients_state = MEI_START_MESSAGE; - dev->init_clients_timer = MEI_CLIENTS_INIT_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 *enum_req; - const size_t len = sizeof(struct hbm_host_enum_request); - /* enumerate clients */ - mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len); - - enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1]; - memset(enum_req, 0, sizeof(struct hbm_host_enum_request)); - enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; - - if (mei_write_message(dev, mei_hdr, (unsigned char *)enum_req, len)) { - dev->dev_state = MEI_DEV_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 = MEI_CLIENTS_INIT_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->dev_state = MEI_DEV_RESETING; - mei_reset(dev, 1); - return ; - } - dev->me_clients = clients; - return ; -} - -void mei_host_client_init(struct work_struct *work) -{ - struct mei_device *dev = container_of(work, - struct mei_device, init_work); - struct mei_client_properties *client_props; - int i; - - mutex_lock(&dev->device_lock); - - bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX); - dev->open_handle_count = 0; - - /* - * Reserving the first three client IDs - * 0: Reserved for MEI Bus Message communications - * 1: Reserved for Watchdog - * 2: Reserved for AMTHI - */ - bitmap_set(dev->host_clients_map, 0, 3); - - for (i = 0; i < dev->me_clients_num; i++) { - client_props = &dev->me_clients[i].props; - - if (!uuid_le_cmp(client_props->protocol_name, mei_amthi_guid)) - mei_amthif_host_init(dev); - else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid)) - mei_wd_host_init(dev); - } - - dev->dev_state = MEI_DEV_ENABLED; - - mutex_unlock(&dev->device_lock); -} - -int mei_host_client_enumerate(struct mei_device *dev) -{ - - struct mei_msg_hdr *mei_hdr; - struct hbm_props_request *prop_req; - const size_t len = sizeof(struct hbm_props_request); - unsigned long next_client_index; - u8 client_num; - - - client_num = dev->me_client_presentation_num; - - next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, - dev->me_client_index); - - /* We got all client properties */ - if (next_client_index == MEI_CLIENTS_MAX) { - schedule_work(&dev->init_work); - - return 0; - } - - dev->me_clients[client_num].client_id = next_client_index; - dev->me_clients[client_num].mei_flow_ctrl_creds = 0; - - mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len); - prop_req = (struct hbm_props_request *)&dev->wr_msg_buf[1]; - - memset(prop_req, 0, sizeof(struct hbm_props_request)); - - - prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; - prop_req->address = next_client_index; - - if (mei_write_message(dev, mei_hdr, (unsigned char *) prop_req, - mei_hdr->length)) { - dev->dev_state = MEI_DEV_RESETING; - dev_err(&dev->pdev->dev, "Properties request command failed\n"); - mei_reset(dev, 1); - - return -EIO; - } - - dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; - dev->me_client_index = next_client_index; - - 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_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid) -{ - int i, res = -ENOENT; - - 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_me_cl_link - create link between host and me clinet and add - * me_cl to the list - * - * @dev: the device structure - * @cl: link between me and host client assocated with opened file descriptor - * @cuuid: uuid of ME client - * @client_id: id of the host client - * - * returns ME client index if ME client - * -EINVAL on incorrect values - * -ENONET if client not found - */ -int mei_me_cl_link(struct mei_device *dev, struct mei_cl *cl, - const uuid_le *cuuid, u8 host_cl_id) -{ - int i; - - if (!dev || !cl || !cuuid) - return -EINVAL; - - /* check for valid client id */ - i = mei_me_cl_by_uuid(dev, cuuid); - if (i >= 0) { - cl->me_client_id = dev->me_clients[i].client_id; - cl->state = MEI_FILE_CONNECTING; - cl->host_client_id = host_cl_id; - - list_add_tail(&cl->link, &dev->file_list); - return (u8)i; - } - - return -ENOENT; -} -/** - * mei_me_cl_unlink - remove me_cl from the list - * - * @dev: the device structure - * @host_client_id: host client id to be removed - */ -void mei_me_cl_unlink(struct mei_device *dev, struct mei_cl *cl) -{ - struct mei_cl *pos, *next; - list_for_each_entry_safe(pos, next, &dev->file_list, link) { - if (cl->host_client_id == pos->host_client_id) { - dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n", - pos->host_client_id, pos->me_client_id); - list_del_init(&pos->link); - break; - } - } -} - -/** - * 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) -{ - struct mei_cl_cb *cb; - int rets, err; - - if (!dev || !cl) - return -ENODEV; - - if (cl->state != MEI_FILE_DISCONNECTING) - return 0; - - cb = mei_io_cb_init(cl, NULL); - if (!cb) - return -ENOMEM; - - cb->fop_type = MEI_FOP_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->list, &dev->ctrl_rd_list.list); - } else { - dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n"); - list_add_tail(&cb->list, &dev->ctrl_wr_list.list); - - } - mutex_unlock(&dev->device_lock); - - err = wait_event_timeout(dev->wait_recvd_msg, - MEI_FILE_DISCONNECTED == cl->state, - mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); - - 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_io_cb_free(cb); - return rets; -} diff --git a/drivers/misc/mei/interface.c b/drivers/misc/mei/interface.c deleted file mode 100644 index 8de854785960..000000000000 --- a/drivers/misc/mei/interface.c +++ /dev/null @@ -1,388 +0,0 @@ -/* - * - * Intel Management Engine Interface (Intel MEI) Linux driver - * Copyright (c) 2003-2012, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - */ - -#include <linux/pci.h> -#include "mei_dev.h" -#include <linux/mei.h> -#include "interface.h" - - - -/** - * mei_set_csr_register - writes H_CSR register to the mei device, - * and ignores the H_IS bit for it is write-one-to-zero. - * - * @dev: the device structure - */ -void mei_hcsr_set(struct mei_device *dev) -{ - if ((dev->host_hw_state & H_IS) == H_IS) - dev->host_hw_state &= ~H_IS; - mei_reg_write(dev, H_CSR, dev->host_hw_state); - dev->host_hw_state = mei_hcsr_read(dev); -} - -/** - * mei_csr_enable_interrupts - enables mei device interrupts - * - * @dev: the device structure - */ -void mei_enable_interrupts(struct mei_device *dev) -{ - dev->host_hw_state |= H_IE; - mei_hcsr_set(dev); -} - -/** - * mei_csr_disable_interrupts - disables mei device interrupts - * - * @dev: the device structure - */ -void mei_disable_interrupts(struct mei_device *dev) -{ - dev->host_hw_state &= ~H_IE; - mei_hcsr_set(dev); -} - -/** - * mei_hbuf_filled_slots - gets number of device filled buffer slots - * - * @device: the device structure - * - * returns number of filled slots - */ -static unsigned char mei_hbuf_filled_slots(struct mei_device *dev) -{ - char read_ptr, write_ptr; - - dev->host_hw_state = mei_hcsr_read(dev); - - read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8); - write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16); - - return (unsigned char) (write_ptr - read_ptr); -} - -/** - * mei_hbuf_is_empty - checks if host buffer is empty. - * - * @dev: the device structure - * - * returns true if empty, false - otherwise. - */ -bool mei_hbuf_is_empty(struct mei_device *dev) -{ - return mei_hbuf_filled_slots(dev) == 0; -} - -/** - * mei_hbuf_empty_slots - counts write empty slots. - * - * @dev: the device structure - * - * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count - */ -int mei_hbuf_empty_slots(struct mei_device *dev) -{ - unsigned char filled_slots, empty_slots; - - filled_slots = mei_hbuf_filled_slots(dev); - empty_slots = dev->hbuf_depth - filled_slots; - - /* check for overflow */ - if (filled_slots > dev->hbuf_depth) - return -EOVERFLOW; - - return empty_slots; -} - -/** - * mei_write_message - writes a message to mei device. - * - * @dev: the device structure - * @header: header of message - * @write_buffer: message buffer will be written - * @write_length: message size will be written - * - * This function returns -EIO if write has failed - */ -int mei_write_message(struct mei_device *dev, struct mei_msg_hdr *header, - unsigned char *buf, unsigned long length) -{ - unsigned long rem, dw_cnt; - u32 *reg_buf = (u32 *)buf; - int i; - int empty_slots; - - - dev_dbg(&dev->pdev->dev, - "mei_write_message header=%08x.\n", - *((u32 *) header)); - - empty_slots = mei_hbuf_empty_slots(dev); - dev_dbg(&dev->pdev->dev, "empty slots = %hu.\n", empty_slots); - - dw_cnt = mei_data2slots(length); - if (empty_slots < 0 || dw_cnt > empty_slots) - return -EIO; - - mei_reg_write(dev, H_CB_WW, *((u32 *) header)); - - for (i = 0; i < length / 4; i++) - mei_reg_write(dev, H_CB_WW, reg_buf[i]); - - rem = length & 0x3; - if (rem > 0) { - u32 reg = 0; - memcpy(®, &buf[length - rem], rem); - mei_reg_write(dev, H_CB_WW, reg); - } - - dev->host_hw_state = mei_hcsr_read(dev); - dev->host_hw_state |= H_IG; - mei_hcsr_set(dev); - dev->me_hw_state = mei_mecsr_read(dev); - if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA) - return -EIO; - - return 0; -} - -/** - * mei_count_full_read_slots - counts read full slots. - * - * @dev: the device structure - * - * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count - */ -int mei_count_full_read_slots(struct mei_device *dev) -{ - char read_ptr, write_ptr; - unsigned char buffer_depth, filled_slots; - - dev->me_hw_state = mei_mecsr_read(dev); - buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24); - read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8); - write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16); - filled_slots = (unsigned char) (write_ptr - read_ptr); - - /* check for overflow */ - if (filled_slots > buffer_depth) - return -EOVERFLOW; - - dev_dbg(&dev->pdev->dev, "filled_slots =%08x\n", filled_slots); - return (int)filled_slots; -} - -/** - * mei_read_slots - reads a message from mei device. - * - * @dev: the device structure - * @buffer: message buffer will be written - * @buffer_length: message size will be read - */ -void mei_read_slots(struct mei_device *dev, unsigned char *buffer, - unsigned long buffer_length) -{ - u32 *reg_buf = (u32 *)buffer; - - for (; buffer_length >= sizeof(u32); buffer_length -= sizeof(u32)) - *reg_buf++ = mei_mecbrw_read(dev); - - if (buffer_length > 0) { - u32 reg = mei_mecbrw_read(dev); - memcpy(reg_buf, ®, buffer_length); - } - - dev->host_hw_state |= H_IG; - mei_hcsr_set(dev); -} - -/** - * mei_flow_ctrl_creds - checks flow_control credentials. - * - * @dev: the device structure - * @cl: private data of the file object - * - * returns 1 if mei_flow_ctrl_creds >0, 0 - otherwise. - * -ENOENT if mei_cl is not present - * -EINVAL if single_recv_buf == 0 - */ -int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl) -{ - int i; - - if (!dev->me_clients_num) - return 0; - - if (cl->mei_flow_ctrl_creds > 0) - return 1; - - for (i = 0; i < dev->me_clients_num; i++) { - struct mei_me_client *me_cl = &dev->me_clients[i]; - if (me_cl->client_id == cl->me_client_id) { - if (me_cl->mei_flow_ctrl_creds) { - if (WARN_ON(me_cl->props.single_recv_buf == 0)) - return -EINVAL; - return 1; - } else { - return 0; - } - } - } - return -ENOENT; -} - -/** - * mei_flow_ctrl_reduce - reduces flow_control. - * - * @dev: the device structure - * @cl: private data of the file object - * @returns - * 0 on success - * -ENOENT when me client is not found - * -EINVAL when ctrl credits are <= 0 - */ -int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl) -{ - int i; - - if (!dev->me_clients_num) - return -ENOENT; - - for (i = 0; i < dev->me_clients_num; i++) { - struct mei_me_client *me_cl = &dev->me_clients[i]; - if (me_cl->client_id == cl->me_client_id) { - if (me_cl->props.single_recv_buf != 0) { - if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0)) - return -EINVAL; - dev->me_clients[i].mei_flow_ctrl_creds--; - } else { - if (WARN_ON(cl->mei_flow_ctrl_creds <= 0)) - return -EINVAL; - cl->mei_flow_ctrl_creds--; - } - return 0; - } - } - return -ENOENT; -} - -/** - * mei_send_flow_control - sends flow control to fw. - * - * @dev: the device structure - * @cl: private data of the file object - * - * This function returns -EIO on write failure - */ -int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl) -{ - struct mei_msg_hdr *mei_hdr; - struct hbm_flow_control *flow_ctrl; - const size_t len = sizeof(struct hbm_flow_control); - - mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len); - - flow_ctrl = (struct hbm_flow_control *)&dev->wr_msg_buf[1]; - memset(flow_ctrl, 0, len); - flow_ctrl->hbm_cmd = MEI_FLOW_CONTROL_CMD; - flow_ctrl->host_addr = cl->host_client_id; - flow_ctrl->me_addr = cl->me_client_id; - /* FIXME: reserved !? */ - memset(flow_ctrl->reserved, 0, sizeof(flow_ctrl->reserved)); - dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n", - cl->host_client_id, cl->me_client_id); - - return mei_write_message(dev, mei_hdr, - (unsigned char *) flow_ctrl, len); -} - -/** - * mei_other_client_is_connecting - checks if other - * client with the same client id is connected. - * - * @dev: the device structure - * @cl: private data of the file object - * - * returns 1 if other client is connected, 0 - otherwise. - */ -int mei_other_client_is_connecting(struct mei_device *dev, - struct mei_cl *cl) -{ - 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 ((cl_pos->state == MEI_FILE_CONNECTING) && - (cl_pos != cl) && - cl->me_client_id == cl_pos->me_client_id) - return 1; - - } - return 0; -} - -/** - * mei_disconnect - sends disconnect message to fw. - * - * @dev: the device structure - * @cl: private data of the file object - * - * This function returns -EIO on write failure - */ -int mei_disconnect(struct mei_device *dev, struct mei_cl *cl) -{ - struct mei_msg_hdr *mei_hdr; - struct hbm_client_connect_request *req; - const size_t len = sizeof(struct hbm_client_connect_request); - - mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len); - - req = (struct hbm_client_connect_request *)&dev->wr_msg_buf[1]; - memset(req, 0, len); - req->hbm_cmd = CLIENT_DISCONNECT_REQ_CMD; - req->host_addr = cl->host_client_id; - req->me_addr = cl->me_client_id; - req->reserved = 0; - - return mei_write_message(dev, mei_hdr, (unsigned char *)req, len); -} - -/** - * mei_connect - sends connect message to fw. - * - * @dev: the device structure - * @cl: private data of the file object - * - * This function returns -EIO on write failure - */ -int mei_connect(struct mei_device *dev, struct mei_cl *cl) -{ - struct mei_msg_hdr *mei_hdr; - struct hbm_client_connect_request *req; - const size_t len = sizeof(struct hbm_client_connect_request); - - mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len); - - req = (struct hbm_client_connect_request *) &dev->wr_msg_buf[1]; - req->hbm_cmd = CLIENT_CONNECT_REQ_CMD; - req->host_addr = cl->host_client_id; - req->me_addr = cl->me_client_id; - req->reserved = 0; - - return mei_write_message(dev, mei_hdr, (unsigned char *) req, len); -} diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 04fa2134615e..b04ed9bdf758 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -21,33 +21,13 @@ #include <linux/fs.h> #include <linux/jiffies.h> -#include "mei_dev.h" #include <linux/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); +#include "mei_dev.h" +#include "hbm.h" +#include "hw-me.h" +#include "client.h" - return IRQ_WAKE_THREAD; -} /** * _mei_cmpl - processes completed operation. @@ -150,8 +130,8 @@ quit: dev_dbg(&dev->pdev->dev, "message read\n"); if (!buffer) { mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); - dev_dbg(&dev->pdev->dev, "discarding message, header =%08x.\n", - *(u32 *) dev->rd_msg_buf); + dev_dbg(&dev->pdev->dev, "discarding message " MEI_HDR_FMT "\n", + MEI_HDR_PRM(mei_hdr)); } return 0; @@ -179,7 +159,7 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots, *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request)); - if (mei_disconnect(dev, cl)) { + if (mei_hbm_cl_disconnect_req(dev, cl)) { cl->status = 0; cb_pos->buf_idx = 0; list_move_tail(&cb_pos->list, &cmpl_list->list); @@ -195,440 +175,6 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots, 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 *pos = NULL, *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); - - return; - } - - if (is_treat_specially_client(&(dev->iamthif_cl), rs)) { - dev->iamthif_state = MEI_IAMTHIF_IDLE; - return; - } - list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { - - cl = pos->cl; - if (!cl) { - list_del(&pos->list); - return; - } - if (pos->fop_type == MEI_FOP_IOCTL) { - if (is_treat_specially_client(cl, rs)) { - list_del(&pos->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 *pos = NULL, *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(pos, next, &dev->ctrl_rd_list.list, list) { - cl = pos->cl; - - if (!cl) { - list_del(&pos->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(&pos->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_connect_request *req) -{ - return (cl->host_client_id == req->host_addr && - cl->me_client_id == req->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_connect_request *disconnect_req) -{ - struct hbm_client_connect_response *disconnect_res; - struct mei_cl *pos, *next; - const size_t len = sizeof(struct hbm_client_connect_response); - - list_for_each_entry_safe(pos, next, &dev->file_list, link) { - if (same_disconn_addr(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); - pos->state = MEI_FILE_DISCONNECTED; - pos->timer_count = 0; - if (pos == &dev->wd_cl) - dev->wd_pending = false; - else if (pos == &dev->iamthif_cl) - dev->iamthif_timer = 0; - - /* prepare disconnect response */ - (void)mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len); - disconnect_res = - (struct hbm_client_connect_response *) - &dev->wr_ext_msg.data; - disconnect_res->hbm_cmd = CLIENT_DISCONNECT_RES_CMD; - disconnect_res->host_addr = pos->host_client_id; - disconnect_res->me_addr = pos->me_client_id; - disconnect_res->status = 0; - 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 mei_me_client *me_client; - struct hbm_host_version_response *version_res; - struct hbm_client_connect_response *connect_res; - struct hbm_client_connect_response *disconnect_res; - struct hbm_client_connect_request *disconnect_req; - struct hbm_flow_control *flow_control; - struct hbm_props_response *props_res; - struct hbm_host_enum_response *enum_res; - struct hbm_host_stop_request *stop_req; - - /* read the message to our buffer */ - BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf)); - mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); - mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; - - switch (mei_msg->hbm_cmd) { - case HOST_START_RES_CMD: - version_res = (struct hbm_host_version_response *) mei_msg; - if (version_res->host_version_supported) { - dev->version.major_version = HBM_MAJOR_VERSION; - dev->version.minor_version = HBM_MINOR_VERSION; - if (dev->dev_state == MEI_DEV_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 { - u32 *buf = dev->wr_msg_buf; - const size_t len = sizeof(struct hbm_host_stop_request); - - dev->version = version_res->me_max_version; - - /* send stop message */ - mei_hdr = mei_hbm_hdr(&buf[0], len); - stop_req = (struct hbm_host_stop_request *)&buf[1]; - memset(stop_req, 0, len); - stop_req->hbm_cmd = HOST_STOP_REQ_CMD; - stop_req->reason = DRIVER_STOP_REQUEST; - - mei_write_message(dev, mei_hdr, - (unsigned char *)stop_req, len); - 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; - me_client = &dev->me_clients[dev->me_client_presentation_num]; - - 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 (me_client->client_id != props_res->address) { - dev_err(&dev->pdev->dev, - "Host client properties reply mismatch\n"); - mei_reset(dev, 1); - - return; - } - - if (dev->dev_state != MEI_DEV_INIT_CLIENTS || - dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) { - dev_err(&dev->pdev->dev, - "Unexpected client properties reply\n"); - mei_reset(dev, 1); - - return; - } - - me_client->props = props_res->client_properties; - dev->me_client_index++; - dev->me_client_presentation_num++; - - mei_host_client_enumerate(dev); - - 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->dev_state == MEI_DEV_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_enumerate(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->dev_state = MEI_DEV_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_connect_request *)mei_msg; - mei_client_disconnect_request(dev, disconnect_req); - break; - - case ME_STOP_REQ_CMD: - { - /* prepare stop request: sent in next interrupt event */ - - const size_t len = sizeof(struct hbm_host_stop_request); - - mei_hdr = mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len); - stop_req = (struct hbm_host_stop_request *)&dev->wr_ext_msg.data; - memset(stop_req, 0, len); - stop_req->hbm_cmd = HOST_STOP_REQ_CMD; - stop_req->reason = DRIVER_STOP_REQUEST; - break; - } - default: - BUG(); - break; - - } -} - /** * _mei_hb_read - processes read related operation. @@ -655,7 +201,7 @@ static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots, *slots -= mei_data2slots(sizeof(struct hbm_flow_control)); - if (mei_send_flow_control(dev, cl)) { + if (mei_hbm_cl_flow_control_req(dev, cl)) { cl->status = -ENODEV; cb_pos->buf_idx = 0; list_move_tail(&cb_pos->list, &cmpl_list->list); @@ -691,8 +237,8 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots, } cl->state = MEI_FILE_CONNECTING; - *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request)); - if (mei_connect(dev, cl)) { + *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request)); + if (mei_hbm_cl_connect_req(dev, cl)) { cl->status = -ENODEV; cb_pos->buf_idx = 0; list_del(&cb_pos->list); @@ -717,25 +263,24 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots, static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots, struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list) { - struct mei_msg_hdr *mei_hdr; + struct mei_msg_hdr mei_hdr; struct mei_cl *cl = cb->cl; size_t len = cb->request_buffer.size - cb->buf_idx; size_t msg_slots = mei_data2slots(len); - 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->reserved = 0; + mei_hdr.host_addr = cl->host_client_id; + mei_hdr.me_addr = cl->me_client_id; + mei_hdr.reserved = 0; if (*slots >= msg_slots) { - mei_hdr->length = len; - mei_hdr->msg_complete = 1; + mei_hdr.length = len; + mei_hdr.msg_complete = 1; /* Split the message only if we can write the whole host buffer */ } else if (*slots == dev->hbuf_depth) { msg_slots = *slots; len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); - mei_hdr->length = len; - mei_hdr->msg_complete = 0; + mei_hdr.length = len; + mei_hdr.msg_complete = 0; } else { /* wait for next time the host buffer is empty */ return 0; @@ -743,23 +288,22 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots, dev_dbg(&dev->pdev->dev, "buf: size = %d idx = %lu\n", cb->request_buffer.size, cb->buf_idx); - dev_dbg(&dev->pdev->dev, "msg: len = %d complete = %d\n", - mei_hdr->length, mei_hdr->msg_complete); + dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr)); *slots -= msg_slots; - if (mei_write_message(dev, mei_hdr, - cb->request_buffer.data + cb->buf_idx, len)) { + if (mei_write_message(dev, &mei_hdr, + cb->request_buffer.data + cb->buf_idx)) { cl->status = -ENODEV; list_move_tail(&cb->list, &cmpl_list->list); return -ENODEV; } - if (mei_flow_ctrl_reduce(dev, cl)) + if (mei_cl_flow_ctrl_reduce(cl)) return -ENODEV; cl->status = 0; - cb->buf_idx += mei_hdr->length; - if (mei_hdr->msg_complete) + cb->buf_idx += mei_hdr.length; + if (mei_hdr.msg_complete) list_move_tail(&cb->list, &dev->write_waiting_list.list); return 0; @@ -791,7 +335,7 @@ static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list, 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); + dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); if (mei_hdr->reserved || !dev->rd_msg_hdr) { dev_dbg(&dev->pdev->dev, "corrupted message header.\n"); @@ -830,19 +374,18 @@ static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list, /* 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); + mei_hbm_dispatch(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); + + dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); ret = mei_amthif_irq_read_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, @@ -930,16 +473,16 @@ static int mei_irq_thread_write_handler(struct mei_device *dev, if (dev->wr_ext_msg.hdr.length) { mei_write_message(dev, &dev->wr_ext_msg.hdr, - dev->wr_ext_msg.data, dev->wr_ext_msg.hdr.length); + dev->wr_ext_msg.data); slots -= mei_data2slots(dev->wr_ext_msg.hdr.length); dev->wr_ext_msg.hdr.length = 0; } if (dev->dev_state == MEI_DEV_ENABLED) { if (dev->wd_pending && - mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) { + mei_cl_flow_ctrl_creds(&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)) + else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) return -ENODEV; dev->wd_pending = false; @@ -978,7 +521,7 @@ static int mei_irq_thread_write_handler(struct mei_device *dev, break; case MEI_FOP_IOCTL: /* connect message */ - if (mei_other_client_is_connecting(dev, cl)) + if (mei_cl_is_other_connecting(cl)) continue; ret = _mei_irq_thread_ioctl(dev, &slots, pos, cl, cmpl_list); @@ -998,7 +541,7 @@ static int mei_irq_thread_write_handler(struct mei_device *dev, cl = pos->cl; if (cl == NULL) continue; - if (mei_flow_ctrl_creds(dev, cl) <= 0) { + if (mei_cl_flow_ctrl_creds(cl) <= 0) { dev_dbg(&dev->pdev->dev, "No flow control credentials for client %d, not sending.\n", cl->host_client_id); @@ -1148,17 +691,14 @@ irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id) /* initialize our complete list */ mutex_lock(&dev->device_lock); mei_io_list_init(&complete_list); - dev->host_hw_state = mei_hcsr_read(dev); /* Ack the interrupt here * In case of MSI we don't go through the quick handler */ if (pci_dev_msi_enabled(dev->pdev)) - mei_reg_write(dev, H_CSR, dev->host_hw_state); - - dev->me_hw_state = mei_mecsr_read(dev); + mei_clear_interrupts(dev); /* check if ME wants a reset */ - if ((dev->me_hw_state & ME_RDY_HRA) == 0 && + if (!mei_me_is_ready(dev) && dev->dev_state != MEI_DEV_RESETING && dev->dev_state != MEI_DEV_INITIALIZING) { dev_dbg(&dev->pdev->dev, "FW not ready.\n"); @@ -1168,17 +708,18 @@ irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id) } /* 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) { + if (!mei_host_is_ready(dev)) { + if (mei_me_is_ready(dev)) { 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->dev_state = MEI_DEV_INIT_CLIENTS; + + mei_host_set_ready(dev); + dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); - /* link is established - * start sending messages. - */ - mei_host_start_message(dev); + /* link is established * start sending messages. */ + + dev->dev_state = MEI_DEV_INIT_CLIENTS; + + mei_hbm_start_req(dev); mutex_unlock(&dev->device_lock); return IRQ_HANDLED; } else { @@ -1202,7 +743,6 @@ irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id) rets = mei_irq_thread_write_handler(dev, &complete_list); 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_hbuf_is_empty(dev); bus_message_received = false; diff --git a/drivers/misc/mei/iorw.c b/drivers/misc/mei/iorw.c deleted file mode 100644 index eb93a1b53b9b..000000000000 --- a/drivers/misc/mei/iorw.c +++ /dev/null @@ -1,366 +0,0 @@ -/* - * - * Intel Management Engine Interface (Intel MEI) Linux driver - * Copyright (c) 2003-2012, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - */ - - -#include <linux/kernel.h> -#include <linux/fs.h> -#include <linux/errno.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/aio.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/ioctl.h> -#include <linux/cdev.h> -#include <linux/list.h> -#include <linux/delay.h> -#include <linux/sched.h> -#include <linux/uuid.h> -#include <linux/jiffies.h> -#include <linux/uaccess.h> - - -#include "mei_dev.h" -#include "hw.h" -#include <linux/mei.h> -#include "interface.h" - -/** - * mei_io_cb_free - free mei_cb_private related memory - * - * @cb: mei callback struct - */ -void mei_io_cb_free(struct mei_cl_cb *cb) -{ - if (cb == NULL) - return; - - kfree(cb->request_buffer.data); - kfree(cb->response_buffer.data); - kfree(cb); -} -/** - * mei_io_cb_init - allocate and initialize io callback - * - * @cl - mei client - * @file: pointer to file structure - * - * returns mei_cl_cb pointer or NULL; - */ -struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp) -{ - struct mei_cl_cb *cb; - - cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); - if (!cb) - return NULL; - - mei_io_list_init(cb); - - cb->file_object = fp; - cb->cl = cl; - cb->buf_idx = 0; - return cb; -} - - -/** - * mei_io_cb_alloc_req_buf - allocate request buffer - * - * @cb - io callback structure - * @size: size of the buffer - * - * returns 0 on success - * -EINVAL if cb is NULL - * -ENOMEM if allocation failed - */ -int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length) -{ - if (!cb) - return -EINVAL; - - if (length == 0) - return 0; - - cb->request_buffer.data = kmalloc(length, GFP_KERNEL); - if (!cb->request_buffer.data) - return -ENOMEM; - cb->request_buffer.size = length; - return 0; -} -/** - * mei_io_cb_alloc_req_buf - allocate respose buffer - * - * @cb - io callback structure - * @size: size of the buffer - * - * returns 0 on success - * -EINVAL if cb is NULL - * -ENOMEM if allocation failed - */ -int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length) -{ - if (!cb) - return -EINVAL; - - if (length == 0) - return 0; - - cb->response_buffer.data = kmalloc(length, GFP_KERNEL); - if (!cb->response_buffer.data) - return -ENOMEM; - cb->response_buffer.size = length; - return 0; -} - - -/** - * mei_me_cl_by_id return index to me_clients for client_id - * - * @dev: the device structure - * @client_id: me client id - * - * Locking: called under "dev->device_lock" lock - * - * returns index on success, -ENOENT on failure. - */ - -int mei_me_cl_by_id(struct mei_device *dev, u8 client_id) -{ - int i; - for (i = 0; i < dev->me_clients_num; i++) - if (dev->me_clients[i].client_id == client_id) - break; - if (WARN_ON(dev->me_clients[i].client_id != client_id)) - return -ENOENT; - - if (i == dev->me_clients_num) - return -ENOENT; - - return i; -} - -/** - * mei_ioctl_connect_client - the connect to fw client IOCTL function - * - * @dev: the device structure - * @data: IOCTL connect data, input and output parameters - * @file: private data of the file object - * - * Locking: called under "dev->device_lock" lock - * - * returns 0 on success, <0 on failure. - */ -int mei_ioctl_connect_client(struct file *file, - struct mei_connect_client_data *data) -{ - struct mei_device *dev; - struct mei_cl_cb *cb; - struct mei_client *client; - struct mei_cl *cl; - long timeout = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT); - int i; - int err; - int rets; - - cl = file->private_data; - if (WARN_ON(!cl || !cl->dev)) - return -ENODEV; - - dev = cl->dev; - - dev_dbg(&dev->pdev->dev, "mei_ioctl_connect_client() Entry\n"); - - /* buffered ioctl cb */ - cb = mei_io_cb_init(cl, file); - if (!cb) { - rets = -ENOMEM; - goto end; - } - - cb->fop_type = MEI_FOP_IOCTL; - - if (dev->dev_state != MEI_DEV_ENABLED) { - rets = -ENODEV; - goto end; - } - if (cl->state != MEI_FILE_INITIALIZING && - cl->state != MEI_FILE_DISCONNECTED) { - rets = -EBUSY; - goto end; - } - - /* find ME client we're trying to connect to */ - i = mei_me_cl_by_uuid(dev, &data->in_client_uuid); - if (i >= 0 && !dev->me_clients[i].props.fixed_address) { - cl->me_client_id = dev->me_clients[i].client_id; - cl->state = MEI_FILE_CONNECTING; - } - - dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n", - cl->me_client_id); - dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n", - dev->me_clients[i].props.protocol_version); - dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n", - dev->me_clients[i].props.max_msg_length); - - /* if we're connecting to amthi client then we will use the - * existing connection - */ - if (uuid_le_cmp(data->in_client_uuid, mei_amthi_guid) == 0) { - dev_dbg(&dev->pdev->dev, "FW Client is amthi\n"); - if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) { - rets = -ENODEV; - goto end; - } - clear_bit(cl->host_client_id, dev->host_clients_map); - mei_me_cl_unlink(dev, cl); - - kfree(cl); - cl = NULL; - file->private_data = &dev->iamthif_cl; - - client = &data->out_client_properties; - client->max_msg_length = - dev->me_clients[i].props.max_msg_length; - client->protocol_version = - dev->me_clients[i].props.protocol_version; - rets = dev->iamthif_cl.status; - - goto end; - } - - if (cl->state != MEI_FILE_CONNECTING) { - rets = -ENODEV; - goto end; - } - - - /* prepare the output buffer */ - client = &data->out_client_properties; - client->max_msg_length = dev->me_clients[i].props.max_msg_length; - client->protocol_version = dev->me_clients[i].props.protocol_version; - dev_dbg(&dev->pdev->dev, "Can connect?\n"); - if (dev->mei_host_buffer_is_empty - && !mei_other_client_is_connecting(dev, cl)) { - dev_dbg(&dev->pdev->dev, "Sending Connect Message\n"); - dev->mei_host_buffer_is_empty = false; - if (mei_connect(dev, cl)) { - dev_dbg(&dev->pdev->dev, "Sending connect message - failed\n"); - rets = -ENODEV; - goto end; - } else { - dev_dbg(&dev->pdev->dev, "Sending connect message - succeeded\n"); - cl->timer_count = MEI_CONNECT_TIMEOUT; - list_add_tail(&cb->list, &dev->ctrl_rd_list.list); - } - - - } else { - dev_dbg(&dev->pdev->dev, "Queuing the connect request due to device busy\n"); - dev_dbg(&dev->pdev->dev, "add connect cb to control write list.\n"); - list_add_tail(&cb->list, &dev->ctrl_wr_list.list); - } - mutex_unlock(&dev->device_lock); - err = wait_event_timeout(dev->wait_recvd_msg, - (MEI_FILE_CONNECTED == cl->state || - MEI_FILE_DISCONNECTED == cl->state), timeout); - - mutex_lock(&dev->device_lock); - if (MEI_FILE_CONNECTED == cl->state) { - dev_dbg(&dev->pdev->dev, "successfully connected to FW client.\n"); - rets = cl->status; - goto end; - } else { - dev_dbg(&dev->pdev->dev, "failed to connect to FW client.cl->state = %d.\n", - cl->state); - if (!err) { - dev_dbg(&dev->pdev->dev, - "wait_event_interruptible_timeout failed on client" - " connect message fw response message.\n"); - } - rets = -EFAULT; - - mei_io_list_flush(&dev->ctrl_rd_list, cl); - mei_io_list_flush(&dev->ctrl_wr_list, cl); - goto end; - } - rets = 0; -end: - dev_dbg(&dev->pdev->dev, "free connect cb memory."); - mei_io_cb_free(cb); - return rets; -} - -/** - * mei_start_read - the start read client message function. - * - * @dev: the device structure - * @if_num: minor number - * @cl: private data of the file object - * - * returns 0 on success, <0 on failure. - */ -int mei_start_read(struct mei_device *dev, struct mei_cl *cl) -{ - struct mei_cl_cb *cb; - int rets; - int i; - - if (cl->state != MEI_FILE_CONNECTED) - return -ENODEV; - - if (dev->dev_state != MEI_DEV_ENABLED) - return -ENODEV; - - if (cl->read_pending || cl->read_cb) { - dev_dbg(&dev->pdev->dev, "read is pending.\n"); - return -EBUSY; - } - i = mei_me_cl_by_id(dev, cl->me_client_id); - if (i < 0) { - dev_err(&dev->pdev->dev, "no such me client %d\n", - cl->me_client_id); - return -ENODEV; - } - - cb = mei_io_cb_init(cl, NULL); - if (!cb) - return -ENOMEM; - - rets = mei_io_cb_alloc_resp_buf(cb, - dev->me_clients[i].props.max_msg_length); - if (rets) - goto err; - - cb->fop_type = MEI_FOP_READ; - cl->read_cb = cb; - if (dev->mei_host_buffer_is_empty) { - dev->mei_host_buffer_is_empty = false; - if (mei_send_flow_control(dev, cl)) { - rets = -ENODEV; - goto err; - } - list_add_tail(&cb->list, &dev->read_list.list); - } else { - list_add_tail(&cb->list, &dev->ctrl_wr_list.list); - } - return rets; -err: - mei_io_cb_free(cb); - return rets; -} - diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 43fb52ff98ad..123c663509ef 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -37,9 +37,11 @@ #include <linux/interrupt.h> #include <linux/miscdevice.h> -#include "mei_dev.h" #include <linux/mei.h> -#include "interface.h" + +#include "mei_dev.h" +#include "hw-me.h" +#include "client.h" /* AMT device is a singleton on the platform */ static struct pci_dev *mei_pdev; @@ -90,28 +92,6 @@ static DEFINE_MUTEX(mei_mutex); /** - * find_read_list_entry - find read list entry - * - * @dev: device structure - * @file: pointer to file structure - * - * returns cb on success, NULL on error - */ -static struct mei_cl_cb *find_read_list_entry( - struct mei_device *dev, - struct mei_cl *cl) -{ - struct mei_cl_cb *pos = NULL; - struct mei_cl_cb *next = NULL; - - dev_dbg(&dev->pdev->dev, "remove read_list CB\n"); - list_for_each_entry_safe(pos, next, &dev->read_list.list, list) - if (mei_cl_cmp_id(cl, pos->cl)) - return pos; - return NULL; -} - -/** * mei_open - the open function * * @inode: pointer to inode structure @@ -123,7 +103,6 @@ static int mei_open(struct inode *inode, struct file *file) { struct mei_cl *cl; struct mei_device *dev; - unsigned long cl_id; int err; err = -ENODEV; @@ -153,24 +132,9 @@ static int mei_open(struct inode *inode, struct file *file) goto out_unlock; } - cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX); - if (cl_id >= MEI_CLIENTS_MAX) { - dev_err(&dev->pdev->dev, "client_id exceded %d", - MEI_CLIENTS_MAX) ; + err = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY); + if (err) goto out_unlock; - } - - cl->host_client_id = cl_id; - - dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id); - - dev->open_handle_count++; - - list_add_tail(&cl->link, &dev->file_list); - - set_bit(cl->host_client_id, dev->host_clients_map); - cl->state = MEI_FILE_INITIALIZING; - cl->sm_state = 0; file->private_data = cl; mutex_unlock(&dev->device_lock); @@ -216,7 +180,7 @@ static int mei_release(struct inode *inode, struct file *file) "ME client = %d\n", cl->host_client_id, cl->me_client_id); - rets = mei_disconnect_host_client(dev, cl); + rets = mei_cl_disconnect(cl); } mei_cl_flush_queues(cl); dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n", @@ -227,12 +191,13 @@ static int mei_release(struct inode *inode, struct file *file) clear_bit(cl->host_client_id, dev->host_clients_map); dev->open_handle_count--; } - mei_me_cl_unlink(dev, cl); + mei_cl_unlink(cl); + /* free read cb */ cb = NULL; if (cl->read_cb) { - cb = find_read_list_entry(dev, cl); + cb = mei_cl_find_read_cb(cl); /* Remove entry from read list */ if (cb) list_del(&cb->list); @@ -322,7 +287,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, goto out; } - err = mei_start_read(dev, cl); + err = mei_cl_read_start(cl); if (err && err != -EBUSY) { dev_dbg(&dev->pdev->dev, "mei start read failure with status = %d\n", err); @@ -393,14 +358,13 @@ copy_buffer: goto out; free: - cb_pos = find_read_list_entry(dev, cl); + cb_pos = mei_cl_find_read_cb(cl); /* Remove entry from read list */ if (cb_pos) list_del(&cb_pos->list); mei_io_cb_free(cb); cl->reading_state = MEI_IDLE; cl->read_cb = NULL; - cl->read_pending = 0; out: dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets); mutex_unlock(&dev->device_lock); @@ -475,16 +439,15 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, /* free entry used in read */ if (cl->reading_state == MEI_READ_COMPLETE) { *offset = 0; - write_cb = find_read_list_entry(dev, cl); + write_cb = mei_cl_find_read_cb(cl); if (write_cb) { list_del(&write_cb->list); mei_io_cb_free(write_cb); write_cb = NULL; cl->reading_state = MEI_IDLE; cl->read_cb = NULL; - cl->read_pending = 0; } - } else if (cl->reading_state == MEI_IDLE && !cl->read_pending) + } else if (cl->reading_state == MEI_IDLE) *offset = 0; @@ -519,7 +482,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, if (rets) { dev_err(&dev->pdev->dev, - "amthi write failed with status = %d\n", rets); + "amthif write failed with status = %d\n", rets); goto err; } mutex_unlock(&dev->device_lock); @@ -530,7 +493,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n", cl->host_client_id, cl->me_client_id); - rets = mei_flow_ctrl_creds(dev, cl); + rets = mei_cl_flow_ctrl_creds(cl); if (rets < 0) goto err; @@ -552,10 +515,10 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, mei_hdr.host_addr = cl->host_client_id; mei_hdr.me_addr = cl->me_client_id; mei_hdr.reserved = 0; - dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n", - *((u32 *) &mei_hdr)); - if (mei_write_message(dev, &mei_hdr, - write_cb->request_buffer.data, mei_hdr.length)) { + + dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n", + MEI_HDR_PRM(&mei_hdr)); + if (mei_write_message(dev, &mei_hdr, write_cb->request_buffer.data)) { rets = -ENODEV; goto err; } @@ -564,7 +527,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, out: if (mei_hdr.msg_complete) { - if (mei_flow_ctrl_reduce(dev, cl)) { + if (mei_cl_flow_ctrl_reduce(cl)) { rets = -ENODEV; goto err; } @@ -582,6 +545,103 @@ err: return rets; } +/** + * mei_ioctl_connect_client - the connect to fw client IOCTL function + * + * @dev: the device structure + * @data: IOCTL connect data, input and output parameters + * @file: private data of the file object + * + * Locking: called under "dev->device_lock" lock + * + * returns 0 on success, <0 on failure. + */ +static int mei_ioctl_connect_client(struct file *file, + struct mei_connect_client_data *data) +{ + struct mei_device *dev; + struct mei_client *client; + struct mei_cl *cl; + int i; + int rets; + + cl = file->private_data; + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + dev = cl->dev; + + if (dev->dev_state != MEI_DEV_ENABLED) { + rets = -ENODEV; + goto end; + } + + if (cl->state != MEI_FILE_INITIALIZING && + cl->state != MEI_FILE_DISCONNECTED) { + rets = -EBUSY; + goto end; + } + + /* find ME client we're trying to connect to */ + i = mei_me_cl_by_uuid(dev, &data->in_client_uuid); + if (i >= 0 && !dev->me_clients[i].props.fixed_address) { + cl->me_client_id = dev->me_clients[i].client_id; + cl->state = MEI_FILE_CONNECTING; + } + + dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n", + cl->me_client_id); + dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n", + dev->me_clients[i].props.protocol_version); + dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n", + dev->me_clients[i].props.max_msg_length); + + /* if we're connecting to amthif client then we will use the + * existing connection + */ + if (uuid_le_cmp(data->in_client_uuid, mei_amthif_guid) == 0) { + dev_dbg(&dev->pdev->dev, "FW Client is amthi\n"); + if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) { + rets = -ENODEV; + goto end; + } + clear_bit(cl->host_client_id, dev->host_clients_map); + mei_cl_unlink(cl); + + kfree(cl); + cl = NULL; + file->private_data = &dev->iamthif_cl; + + client = &data->out_client_properties; + client->max_msg_length = + dev->me_clients[i].props.max_msg_length; + client->protocol_version = + dev->me_clients[i].props.protocol_version; + rets = dev->iamthif_cl.status; + + goto end; + } + + if (cl->state != MEI_FILE_CONNECTING) { + rets = -ENODEV; + goto end; + } + + + /* prepare the output buffer */ + client = &data->out_client_properties; + client->max_msg_length = dev->me_clients[i].props.max_msg_length; + client->protocol_version = dev->me_clients[i].props.protocol_version; + dev_dbg(&dev->pdev->dev, "Can connect?\n"); + + + rets = mei_cl_connect(cl, file); + +end: + dev_dbg(&dev->pdev->dev, "free connect cb memory."); + return rets; +} + /** * mei_ioctl - the IOCTL function @@ -630,6 +690,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) rets = -EFAULT; goto out; } + rets = mei_ioctl_connect_client(file, connect_data); /* if all is ok, copying the data back to user. */ @@ -828,8 +889,6 @@ static int mei_probe(struct pci_dev *pdev, pdev->irq); goto disable_msi; } - INIT_DELAYED_WORK(&dev->timer_work, mei_timer); - INIT_WORK(&dev->init_work, mei_host_client_init); if (mei_hw_init(dev)) { dev_err(&pdev->dev, "init hw failure.\n"); @@ -854,8 +913,6 @@ static int mei_probe(struct pci_dev *pdev, return 0; release_irq: - /* disable interrupts */ - dev->host_hw_state = mei_hcsr_read(dev); mei_disable_interrupts(dev); flush_scheduled_work(); free_irq(pdev->irq, dev); @@ -903,11 +960,11 @@ static void mei_remove(struct pci_dev *pdev) if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) { dev->iamthif_cl.state = MEI_FILE_DISCONNECTING; - mei_disconnect_host_client(dev, &dev->iamthif_cl); + mei_cl_disconnect(&dev->iamthif_cl); } if (dev->wd_cl.state == MEI_FILE_CONNECTED) { dev->wd_cl.state = MEI_FILE_DISCONNECTING; - mei_disconnect_host_client(dev, &dev->wd_cl); + mei_cl_disconnect(&dev->wd_cl); } /* Unregistering watchdog device */ @@ -915,8 +972,14 @@ static void mei_remove(struct pci_dev *pdev) /* remove entry if already in list */ dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n"); - mei_me_cl_unlink(dev, &dev->wd_cl); - mei_me_cl_unlink(dev, &dev->iamthif_cl); + + if (dev->open_handle_count > 0) + dev->open_handle_count--; + mei_cl_unlink(&dev->wd_cl); + + if (dev->open_handle_count > 0) + dev->open_handle_count--; + mei_cl_unlink(&dev->iamthif_cl); dev->iamthif_current_cb = NULL; dev->me_clients_num = 0; diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 25da04549d04..d6589d0d305a 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -21,7 +21,9 @@ #include <linux/watchdog.h> #include <linux/poll.h> #include <linux/mei.h> + #include "hw.h" +#include "hw-me-regs.h" /* * watch dog definition @@ -44,7 +46,7 @@ /* * AMTHI Client UUID */ -extern const uuid_le mei_amthi_guid; +extern const uuid_le mei_amthif_guid; /* * Watchdog Client UUID @@ -65,12 +67,18 @@ extern const u8 mei_wd_state_independence_msg[3][4]; * Number of File descriptors/handles * that can be opened to the driver. * - * Limit to 253: 256 Total Clients + * Limit to 255: 256 Total Clients * minus internal client for MEI Bus Messags - * minus internal client for AMTHI - * minus internal client for Watchdog */ -#define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 3) +#define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 1) + +/* + * Internal Clients Number + */ +#define MEI_HOST_CLIENT_ID_ANY (-1) +#define MEI_HBM_HOST_CLIENT_ID 0 /* not used, just for documentation */ +#define MEI_WD_HOST_CLIENT_ID 1 +#define MEI_IAMTHIF_HOST_CLIENT_ID 2 /* File state */ @@ -150,6 +158,19 @@ struct mei_message_data { unsigned char *data; }; +/** + * struct mei_me_client - representation of me (fw) client + * + * @props - client properties + * @client_id - me client id + * @mei_flow_ctrl_creds - flow control credits + */ +struct mei_me_client { + struct mei_client_properties props; + u8 client_id; + u8 mei_flow_ctrl_creds; +}; + struct mei_cl; @@ -178,7 +199,6 @@ struct mei_cl { wait_queue_head_t tx_wait; wait_queue_head_t rx_wait; wait_queue_head_t wait; - int read_pending; int status; /* ID of client connected */ u8 host_client_id; @@ -193,6 +213,7 @@ struct mei_cl { /** * struct mei_device - MEI private device struct + * @mem_addr - mem mapped base register address * @hbuf_depth - depth of host(write) buffer * @wr_ext_msg - buffer for hbm control responses (set in read cycle) */ @@ -213,11 +234,7 @@ struct mei_device { */ struct list_head file_list; long open_handle_count; - /* - * memory of device - */ - unsigned int mem_base; - unsigned int mem_length; + void __iomem *mem_addr; /* * lock for the device @@ -243,11 +260,16 @@ struct mei_device { enum mei_dev_state dev_state; enum mei_init_clients_states init_clients_state; u16 init_clients_timer; - bool need_reset; unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */ u32 rd_msg_hdr; - u32 wr_msg_buf[128]; /* used for control messages */ + + /* used for control messages */ + struct { + struct mei_msg_hdr hdr; + unsigned char data[128]; + } wr_msg; + struct { struct mei_msg_hdr hdr; unsigned char data[4]; /* All HBM messages are 4 bytes */ @@ -303,70 +325,6 @@ static inline unsigned long mei_secs_to_jiffies(unsigned long sec) struct mei_device *mei_device_init(struct pci_dev *pdev); void mei_reset(struct mei_device *dev, int interrupts); int mei_hw_init(struct mei_device *dev); -int mei_task_initialize_clients(void *data); -int mei_initialize_clients(struct mei_device *dev); -int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl); -void mei_allocate_me_clients_storage(struct mei_device *dev); - - -int mei_me_cl_link(struct mei_device *dev, struct mei_cl *cl, - const uuid_le *cguid, u8 host_client_id); -void mei_me_cl_unlink(struct mei_device *dev, struct mei_cl *cl); -int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid); -int mei_me_cl_by_id(struct mei_device *dev, u8 client_id); - -/* - * MEI IO Functions - */ -struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp); -void mei_io_cb_free(struct mei_cl_cb *priv_cb); -int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length); -int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length); - - -/** - * mei_io_list_init - Sets up a queue list. - * - * @list: An instance cl callback structure - */ -static inline void mei_io_list_init(struct mei_cl_cb *list) -{ - INIT_LIST_HEAD(&list->list); -} -void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl); - -/* - * MEI ME Client Functions - */ - -struct mei_cl *mei_cl_allocate(struct mei_device *dev); -void mei_cl_init(struct mei_cl *cl, struct mei_device *dev); -int mei_cl_flush_queues(struct mei_cl *cl); -/** - * mei_cl_cmp_id - tells if file private data have same id - * - * @fe1: private data of 1. file object - * @fe2: private data of 2. file object - * - * returns true - if ids are the same and not NULL - */ -static inline bool mei_cl_cmp_id(const struct mei_cl *cl1, - const struct mei_cl *cl2) -{ - return cl1 && cl2 && - (cl1->host_client_id == cl2->host_client_id) && - (cl1->me_client_id == cl2->me_client_id); -} - - - -/* - * MEI Host Client Functions - */ -void mei_host_start_message(struct mei_device *dev); -void mei_host_enum_clients_message(struct mei_device *dev); -int mei_host_client_enumerate(struct mei_device *dev); -void mei_host_client_init(struct work_struct *work); /* * MEI interrupt functions prototype @@ -376,20 +334,11 @@ irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id); void mei_timer(struct work_struct *work); /* - * MEI input output function prototype - */ -int mei_ioctl_connect_client(struct file *file, - struct mei_connect_client_data *data); - -int mei_start_read(struct mei_device *dev, struct mei_cl *cl); - - -/* * AMTHIF - AMT Host Interface Functions */ void mei_amthif_reset_params(struct mei_device *dev); -void mei_amthif_host_init(struct mei_device *dev); +int mei_amthif_host_init(struct mei_device *dev); int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *priv_cb); @@ -407,9 +356,6 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, void mei_amthif_run_next_cmd(struct mei_device *dev); -int mei_amthif_read_message(struct mei_cl_cb *complete_list, - struct mei_device *dev, struct mei_msg_hdr *mei_hdr); - int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots, struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list); @@ -418,92 +364,46 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list, struct mei_device *dev, struct mei_msg_hdr *mei_hdr); int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); -/* - * Register Access Function - */ -/** - * mei_reg_read - Reads 32bit data from the mei device - * - * @dev: the device structure - * @offset: offset from which to read the data - * - * returns register value (u32) +int mei_wd_send(struct mei_device *dev); +int mei_wd_stop(struct mei_device *dev); +int mei_wd_host_init(struct mei_device *dev); +/* + * mei_watchdog_register - Registering watchdog interface + * once we got connection to the WD Client + * @dev - mei device */ -static inline u32 mei_reg_read(const struct mei_device *dev, - unsigned long offset) -{ - return ioread32(dev->mem_addr + offset); -} - -/** - * mei_reg_write - Writes 32bit data to the mei device - * - * @dev: the device structure - * @offset: offset from which to write the data - * @value: register value to write (u32) +void mei_watchdog_register(struct mei_device *dev); +/* + * mei_watchdog_unregister - Unregistering watchdog interface + * @dev - mei device */ -static inline void mei_reg_write(const struct mei_device *dev, - unsigned long offset, u32 value) -{ - iowrite32(value, dev->mem_addr + offset); -} +void mei_watchdog_unregister(struct mei_device *dev); -/** - * mei_hcsr_read - Reads 32bit data from the host CSR - * - * @dev: the device structure - * - * returns the byte read. - */ -static inline u32 mei_hcsr_read(const struct mei_device *dev) -{ - return mei_reg_read(dev, H_CSR); -} -/** - * mei_mecsr_read - Reads 32bit data from the ME CSR - * - * @dev: the device structure - * - * returns ME_CSR_HA register value (u32) +/* + * Register Access Function */ -static inline u32 mei_mecsr_read(const struct mei_device *dev) -{ - return mei_reg_read(dev, ME_CSR_HA); -} -/** - * get_me_cb_rw - Reads 32bit data from the mei ME_CB_RW register - * - * @dev: the device structure - * - * returns ME_CB_RW register value (u32) - */ -static inline u32 mei_mecbrw_read(const struct mei_device *dev) -{ - return mei_reg_read(dev, ME_CB_RW); -} +void mei_hw_config(struct mei_device *dev); +void mei_hw_reset(struct mei_device *dev, bool intr_enable); +u32 mei_mecbrw_read(const struct mei_device *dev); -/* - * mei interface function prototypes - */ -void mei_hcsr_set(struct mei_device *dev); -void mei_csr_clear_his(struct mei_device *dev); +void mei_clear_interrupts(struct mei_device *dev); void mei_enable_interrupts(struct mei_device *dev); void mei_disable_interrupts(struct mei_device *dev); -static inline struct mei_msg_hdr *mei_hbm_hdr(u32 *buf, size_t length) -{ - struct mei_msg_hdr *hdr = (struct mei_msg_hdr *)buf; - hdr->host_addr = 0; - hdr->me_addr = 0; - hdr->length = length; - hdr->msg_complete = 1; - hdr->reserved = 0; - return hdr; -} +void mei_host_set_ready(struct mei_device *dev); +bool mei_host_is_ready(struct mei_device *dev); +bool mei_me_is_ready(struct mei_device *dev); + + + +#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d" +#define MEI_HDR_PRM(hdr) \ + (hdr)->host_addr, (hdr)->me_addr, \ + (hdr)->length, (hdr)->msg_complete #endif diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c index 9299a8c29a6f..77b3820380b0 100644 --- a/drivers/misc/mei/wd.c +++ b/drivers/misc/mei/wd.c @@ -21,11 +21,13 @@ #include <linux/sched.h> #include <linux/watchdog.h> -#include "mei_dev.h" -#include "hw.h" -#include "interface.h" #include <linux/mei.h> +#include "mei_dev.h" +#include "hbm.h" +#include "hw-me.h" +#include "client.h" + static const u8 mei_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 }; static const u8 mei_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 }; @@ -62,30 +64,41 @@ static void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout) */ int mei_wd_host_init(struct mei_device *dev) { - int id; - mei_cl_init(&dev->wd_cl, dev); + struct mei_cl *cl = &dev->wd_cl; + int i; + int ret; + + mei_cl_init(cl, dev); - /* look for WD client and connect to it */ - dev->wd_cl.state = MEI_FILE_DISCONNECTED; dev->wd_timeout = MEI_WD_DEFAULT_TIMEOUT; dev->wd_state = MEI_WD_IDLE; - /* Connect WD ME client to the host client */ - id = mei_me_cl_link(dev, &dev->wd_cl, - &mei_wd_guid, MEI_WD_HOST_CLIENT_ID); - if (id < 0) { + /* check for valid client id */ + i = mei_me_cl_by_uuid(dev, &mei_wd_guid); + if (i < 0) { dev_info(&dev->pdev->dev, "wd: failed to find the client\n"); return -ENOENT; } - if (mei_connect(dev, &dev->wd_cl)) { + cl->me_client_id = dev->me_clients[i].client_id; + + ret = mei_cl_link(cl, MEI_WD_HOST_CLIENT_ID); + + if (ret < 0) { + dev_info(&dev->pdev->dev, "wd: failed link client\n"); + return -ENOENT; + } + + cl->state = MEI_FILE_CONNECTING; + + if (mei_hbm_cl_connect_req(dev, cl)) { dev_err(&dev->pdev->dev, "wd: failed to connect to the client\n"); - dev->wd_cl.state = MEI_FILE_DISCONNECTED; - dev->wd_cl.host_client_id = 0; + cl->state = MEI_FILE_DISCONNECTED; + cl->host_client_id = 0; return -EIO; } - dev->wd_cl.timer_count = MEI_CONNECT_TIMEOUT; + cl->timer_count = MEI_CONNECT_TIMEOUT; return 0; } @@ -101,22 +114,21 @@ int mei_wd_host_init(struct mei_device *dev) */ int mei_wd_send(struct mei_device *dev) { - struct mei_msg_hdr *mei_hdr; + struct mei_msg_hdr hdr; - mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; - mei_hdr->host_addr = dev->wd_cl.host_client_id; - mei_hdr->me_addr = dev->wd_cl.me_client_id; - mei_hdr->msg_complete = 1; - mei_hdr->reserved = 0; + hdr.host_addr = dev->wd_cl.host_client_id; + hdr.me_addr = dev->wd_cl.me_client_id; + hdr.msg_complete = 1; + hdr.reserved = 0; if (!memcmp(dev->wd_data, mei_start_wd_params, MEI_WD_HDR_SIZE)) - mei_hdr->length = MEI_WD_START_MSG_SIZE; + hdr.length = MEI_WD_START_MSG_SIZE; else if (!memcmp(dev->wd_data, mei_stop_wd_params, MEI_WD_HDR_SIZE)) - mei_hdr->length = MEI_WD_STOP_MSG_SIZE; + hdr.length = MEI_WD_STOP_MSG_SIZE; else return -EINVAL; - return mei_write_message(dev, mei_hdr, dev->wd_data, mei_hdr->length); + return mei_write_message(dev, &hdr, dev->wd_data); } /** @@ -141,7 +153,7 @@ int mei_wd_stop(struct mei_device *dev) dev->wd_state = MEI_WD_STOPPING; - ret = mei_flow_ctrl_creds(dev, &dev->wd_cl); + ret = mei_cl_flow_ctrl_creds(&dev->wd_cl); if (ret < 0) goto out; @@ -150,7 +162,7 @@ int mei_wd_stop(struct mei_device *dev) dev->mei_host_buffer_is_empty = false; if (!mei_wd_send(dev)) { - ret = mei_flow_ctrl_reduce(dev, &dev->wd_cl); + ret = mei_cl_flow_ctrl_reduce(&dev->wd_cl); if (ret) goto out; } else { @@ -271,7 +283,7 @@ static int mei_wd_ops_ping(struct watchdog_device *wd_dev) /* Check if we can send the ping to HW*/ if (dev->mei_host_buffer_is_empty && - mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) { + mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) { dev->mei_host_buffer_is_empty = false; dev_dbg(&dev->pdev->dev, "wd: sending ping\n"); @@ -282,9 +294,9 @@ static int mei_wd_ops_ping(struct watchdog_device *wd_dev) goto end; } - if (mei_flow_ctrl_reduce(dev, &dev->wd_cl)) { + if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) { dev_err(&dev->pdev->dev, - "wd: mei_flow_ctrl_reduce() failed.\n"); + "wd: mei_cl_flow_ctrl_reduce() failed.\n"); ret = -EIO; goto end; } |
