mei-objs += interrupt.o
mei-objs += client.o
mei-objs += main.o
-mei-objs += amthif.o
mei-objs += bus.o
mei-objs += bus-fixup.o
mei-$(CONFIG_DEBUG_FS) += debugfs.o
+++ /dev/null
-/*
- *
- * 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/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 <linux/slab.h>
-
-#include <linux/mei.h>
-
-#include "mei_dev.h"
-#include "hbm.h"
-#include "client.h"
-
-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
- *
- * @dev: the device structure
- */
-void mei_amthif_reset_params(struct mei_device *dev)
-{
- /* reset iamthif parameters. */
- dev->iamthif_canceled = false;
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- dev->iamthif_stall_timer = 0;
- dev->iamthif_open_count = 0;
-}
-
-/**
- * mei_amthif_host_init - mei initialization amthif client.
- *
- * @dev: the device structure
- * @me_cl: me client
- *
- * Return: 0 on success, <0 on failure.
- */
-int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
-{
- struct mei_cl *cl = &dev->iamthif_cl;
- int ret;
-
- mutex_lock(&dev->device_lock);
-
- if (mei_cl_is_connected(cl)) {
- ret = 0;
- goto out;
- }
-
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
-
- mei_cl_init(cl, dev);
-
- ret = mei_cl_link(cl);
- if (ret < 0) {
- dev_err(dev->dev, "amthif: failed cl_link %d\n", ret);
- goto out;
- }
-
- ret = mei_cl_connect(cl, me_cl, NULL);
-
-out:
- mutex_unlock(&dev->device_lock);
- return ret;
-}
-
-/**
- * mei_amthif_read_start - queue message for sending read credential
- *
- * @cl: host client
- * @fp: file pointer of message recipient
- *
- * Return: 0 on success, <0 on failure.
- */
-static int mei_amthif_read_start(struct mei_cl *cl, const struct file *fp)
-{
- struct mei_device *dev = cl->dev;
- struct mei_cl_cb *cb;
-
- cb = mei_cl_enqueue_ctrl_wr_cb(cl, mei_cl_mtu(cl), MEI_FOP_READ, fp);
- if (!cb)
- return -ENOMEM;
-
- cl->rx_flow_ctrl_creds++;
-
- dev->iamthif_state = MEI_IAMTHIF_READING;
- cl->fp = cb->fp;
-
- return 0;
-}
-
-/**
- * mei_amthif_run_next_cmd - send next amt command from queue
- *
- * @dev: the device structure
- *
- * Return: 0 on success, <0 on failure.
- */
-int mei_amthif_run_next_cmd(struct mei_device *dev)
-{
- struct mei_cl *cl = &dev->iamthif_cl;
- struct mei_cl_cb *cb;
- int ret;
-
- dev->iamthif_canceled = false;
-
- dev_dbg(dev->dev, "complete amthif cmd_list cb.\n");
-
- cb = list_first_entry_or_null(&dev->amthif_cmd_list, typeof(*cb), list);
- if (!cb) {
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- cl->fp = NULL;
- return 0;
- }
-
- list_del_init(&cb->list);
- dev->iamthif_state = MEI_IAMTHIF_WRITING;
- cl->fp = cb->fp;
-
- ret = mei_cl_write(cl, cb);
- if (ret < 0)
- return ret;
-
- if (cb->completed)
- cb->status = mei_amthif_read_start(cl, cb->fp);
-
- return 0;
-}
-
-/**
- * mei_amthif_write - write amthif data to amthif client
- *
- * @cl: host client
- * @cb: mei call back struct
- *
- * Return: 0 on success, <0 on failure.
- */
-int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb)
-{
-
- struct mei_device *dev = cl->dev;
-
- list_add_tail(&cb->list, &dev->amthif_cmd_list);
-
- /*
- * The previous request is still in processing, queue this one.
- */
- if (dev->iamthif_state != MEI_IAMTHIF_IDLE)
- return 0;
-
- return mei_amthif_run_next_cmd(dev);
-}
-
-/**
- * mei_amthif_poll - the amthif poll function
- *
- * @file: pointer to file structure
- * @wait: pointer to poll_table structure
- *
- * Return: poll mask
- *
- * Locking: called under "dev->device_lock" lock
- */
-unsigned int mei_amthif_poll(struct file *file, poll_table *wait)
-{
- struct mei_cl *cl = file->private_data;
- struct mei_cl_cb *cb = mei_cl_read_cb(cl, file);
- unsigned int mask = 0;
-
- poll_wait(file, &cl->rx_wait, wait);
- if (cb)
- mask |= POLLIN | POLLRDNORM;
-
- return mask;
-}
-
-/**
- * mei_amthif_irq_write - write iamthif command in irq thread context.
- *
- * @cl: private data of the file object.
- * @cb: callback block.
- * @cmpl_list: complete list.
- *
- * Return: 0, OK; otherwise, error.
- */
-int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
- struct list_head *cmpl_list)
-{
- int ret;
-
- ret = mei_cl_irq_write(cl, cb, cmpl_list);
- if (ret)
- return ret;
-
- if (cb->completed)
- cb->status = mei_amthif_read_start(cl, cb->fp);
-
- return 0;
-}
-
-/**
- * mei_amthif_irq_read_msg - read routine after ISR to
- * handle the read amthif message
- *
- * @cl: mei client
- * @mei_hdr: header of amthif message
- * @cmpl_list: completed callbacks list
- *
- * Return: -ENODEV if cb is NULL 0 otherwise; error message is in cb->status
- */
-int mei_amthif_irq_read_msg(struct mei_cl *cl,
- struct mei_msg_hdr *mei_hdr,
- struct list_head *cmpl_list)
-{
- struct mei_device *dev;
- int ret;
-
- dev = cl->dev;
-
- if (dev->iamthif_state != MEI_IAMTHIF_READING) {
- mei_irq_discard_msg(dev, mei_hdr);
- return 0;
- }
-
- ret = mei_cl_irq_read_msg(cl, mei_hdr, cmpl_list);
- if (ret)
- return ret;
-
- if (!mei_hdr->msg_complete)
- return 0;
-
- dev_dbg(dev->dev, "completed amthif read.\n ");
- dev->iamthif_stall_timer = 0;
-
- return 0;
-}
-
-/**
- * mei_amthif_complete - complete amthif callback.
- *
- * @cl: host client
- * @cb: callback block.
- */
-void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
-{
- struct mei_device *dev = cl->dev;
-
- dev_dbg(dev->dev, "completing amthif call back.\n");
- switch (cb->fop_type) {
- case MEI_FOP_WRITE:
- if (!cb->status) {
- dev->iamthif_stall_timer = MEI_IAMTHIF_STALL_TIMER;
- mei_schedule_stall_timer(dev);
- mei_io_cb_free(cb);
- return;
- }
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- cl->fp = NULL;
- if (!dev->iamthif_canceled) {
- /*
- * in case of error enqueue the write cb to complete
- * read list so it can be propagated to the reader
- */
- list_add_tail(&cb->list, &cl->rd_completed);
- wake_up_interruptible(&cl->rx_wait);
- } else {
- mei_io_cb_free(cb);
- }
- break;
- case MEI_FOP_READ:
- if (!dev->iamthif_canceled) {
- list_add_tail(&cb->list, &cl->rd_completed);
- dev_dbg(dev->dev, "amthif read completed\n");
- wake_up_interruptible(&cl->rx_wait);
- } else {
- mei_io_cb_free(cb);
- }
-
- dev->iamthif_stall_timer = 0;
- mei_amthif_run_next_cmd(dev);
- break;
- default:
- WARN_ON(1);
- }
-}
-
-/**
-* mei_amthif_release - the release function
-*
-* @dev: device structure
-* @fp: pointer to file structure
-*
-* Return: 0 on success, <0 on error
-*/
-int mei_amthif_release(struct mei_device *dev, struct file *fp)
-{
- struct mei_cl *cl = fp->private_data;
-
- if (dev->iamthif_open_count > 0)
- dev->iamthif_open_count--;
-
- if (cl->fp == fp && dev->iamthif_state != MEI_IAMTHIF_IDLE) {
-
- dev_dbg(dev->dev, "amthif canceled iamthif state %d\n",
- dev->iamthif_state);
- dev->iamthif_canceled = true;
- }
-
- /* Don't clean ctrl_rd_list here, the reads has to be completed */
- mei_io_list_free_fp(&dev->amthif_cmd_list, fp);
- mei_io_list_free_fp(&cl->rd_completed, fp);
-
- return 0;
-}
{
struct mei_device *bus =
container_of(work, struct mei_device, bus_rescan_work);
- struct mei_me_client *me_cl;
-
- me_cl = mei_me_cl_by_uuid(bus, &mei_amthif_guid);
- if (me_cl)
- mei_amthif_host_init(bus, me_cl);
- mei_me_cl_put(me_cl);
mei_cl_bus_rescan(bus);
}
* @head: io list
* @fp: file pointer (matching cb file object), may be NULL
*/
-void mei_io_list_free_fp(struct list_head *head, const struct file *fp)
+static void mei_io_list_free_fp(struct list_head *head, const struct file *fp)
{
struct mei_cl_cb *cb, *next;
* @cl: host client to be initialized
* @dev: mei device
*/
-void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
+static void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
{
memset(cl, 0, sizeof(struct mei_cl));
init_waitqueue_head(&cl->wait);
int mei_cl_link(struct mei_cl *cl)
{
struct mei_device *dev;
- long open_handle_count;
int id;
if (WARN_ON(!cl || !cl->dev))
return -EMFILE;
}
- open_handle_count = dev->open_handle_count + dev->iamthif_open_count;
- if (open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) {
+ if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) {
dev_err(dev->dev, "open_handle_count exceeded %d",
MEI_MAX_OPEN_HANDLE_COUNT);
return -EMFILE;
if (!cl)
return 0;
- /* amthif might not be initialized */
- if (!cl->dev)
+ if (WARN_ON(!cl->dev))
return 0;
dev = cl->dev;
mei_io_list_free_cl(&dev->write_waiting_list, cl);
mei_io_list_flush_cl(&dev->ctrl_rd_list, cl);
mei_io_list_flush_cl(&dev->ctrl_wr_list, cl);
- mei_io_list_free_cl(&dev->amthif_cmd_list, cl);
mei_cl_wake_all(cl);
cl->rx_flow_ctrl_creds = 0;
cl->tx_flow_ctrl_creds = 0;
return -ENOTTY;
}
- if (mei_cl_is_fixed_address(cl) || cl == &dev->iamthif_cl)
+ if (mei_cl_is_fixed_address(cl))
return 0;
/* HW currently supports only one pending read */
* MEI IO Functions
*/
void mei_io_cb_free(struct mei_cl_cb *priv_cb);
-void mei_io_list_free_fp(struct list_head *head, const struct file *fp);
/*
* 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 mei_cl_unlink(struct mei_cl *cl);
int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
struct list_head *cmpl_list);
int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp);
-int mei_cl_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *hdr,
- struct list_head *cmpl_list);
int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb);
int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
struct list_head *cmpl_list);
/* fall through and remove the sw state even if hw reset has failed */
/* no need to clean up software state in case of power up */
- if (state != MEI_DEV_INITIALIZING &&
- state != MEI_DEV_POWER_UP) {
-
- /* remove all waiting requests */
+ if (state != MEI_DEV_INITIALIZING && state != MEI_DEV_POWER_UP)
mei_cl_all_disconnect(dev);
- /* remove entry if already in list */
- dev_dbg(dev->dev, "remove iamthif from the file list.\n");
- mei_cl_unlink(&dev->iamthif_cl);
- mei_amthif_reset_params(dev);
- }
-
mei_hbm_reset(dev);
dev->rd_msg_hdr = 0;
INIT_WORK(&dev->reset_work, mei_reset_work);
INIT_WORK(&dev->bus_rescan_work, mei_cl_bus_rescan_work);
- INIT_LIST_HEAD(&dev->iamthif_cl.link);
- INIT_LIST_HEAD(&dev->amthif_cmd_list);
-
bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
dev->open_handle_count = 0;
list_del_init(&cb->list);
dev_dbg(dev->dev, "completing call back.\n");
- if (cl == &dev->iamthif_cl)
- mei_amthif_complete(cl, cb);
- else
- mei_cl_complete(cl, cb);
+ mei_cl_complete(cl, cb);
}
}
EXPORT_SYMBOL_GPL(mei_irq_compl_handler);
* @dev: mei device
* @hdr: message header
*/
-void mei_irq_discard_msg(struct mei_device *dev, struct mei_msg_hdr *hdr)
+static void mei_irq_discard_msg(struct mei_device *dev, struct mei_msg_hdr *hdr)
{
/*
* no need to check for size as it is guarantied
*
* Return: always 0
*/
-int mei_cl_irq_read_msg(struct mei_cl *cl,
- struct mei_msg_hdr *mei_hdr,
- struct list_head *cmpl_list)
+static int mei_cl_irq_read_msg(struct mei_cl *cl,
+ struct mei_msg_hdr *mei_hdr,
+ struct list_head *cmpl_list)
{
struct mei_device *dev = cl->dev;
struct mei_cl_cb *cb;
goto end;
}
- if (cl == &dev->iamthif_cl) {
- ret = mei_amthif_irq_read_msg(cl, mei_hdr, cmpl_list);
- } else {
- ret = mei_cl_irq_read_msg(cl, mei_hdr, cmpl_list);
- }
+ ret = mei_cl_irq_read_msg(cl, mei_hdr, cmpl_list);
reset_slots:
dev_dbg(dev->dev, "complete write list cb.\n");
list_for_each_entry_safe(cb, next, &dev->write_list, list) {
cl = cb->cl;
- if (cl == &dev->iamthif_cl)
- ret = mei_amthif_irq_write(cl, cb, cmpl_list);
- else
- ret = mei_cl_irq_write(cl, cb, cmpl_list);
+ ret = mei_cl_irq_write(cl, cb, cmpl_list);
if (ret)
return ret;
}
}
}
- if (!mei_cl_is_connected(&dev->iamthif_cl))
- goto out;
-
- if (dev->iamthif_stall_timer) {
- if (--dev->iamthif_stall_timer == 0) {
- dev_err(dev->dev, "timer: amthif hanged.\n");
- mei_reset(dev);
-
- mei_amthif_run_next_cmd(dev);
- goto out;
- }
- reschedule_timer = true;
- }
-
out:
if (dev->dev_state != MEI_DEV_DISABLED && reschedule_timer)
mei_schedule_stall_timer(dev);
dev = cl->dev;
mutex_lock(&dev->device_lock);
- if (cl == &dev->iamthif_cl) {
- rets = mei_amthif_release(dev, file);
- goto out;
- }
+
rets = mei_cl_disconnect(cl);
mei_cl_flush_queues(cl, file);
file->private_data = NULL;
kfree(cl);
-out:
+
mutex_unlock(&dev->device_lock);
return rets;
}
goto out;
}
-
-again:
mutex_unlock(&dev->device_lock);
if (wait_event_interruptible(cl->rx_wait,
!list_empty(&cl->rd_completed) ||
cb = mei_cl_read_cb(cl, file);
if (!cb) {
- /*
- * For amthif all the waiters are woken up,
- * but only fp with matching cb->fp get the cb,
- * the others have to return to wait on read.
- */
- if (cl == &dev->iamthif_cl)
- goto again;
-
rets = 0;
goto out;
}
goto out;
}
- if (cl == &dev->iamthif_cl) {
- rets = mei_amthif_write(cl, cb);
- if (!rets)
- rets = length;
- goto out;
- }
-
rets = mei_cl_write(cl, cb);
out:
mutex_unlock(&dev->device_lock);
dev_dbg(dev->dev, "FW Client - Max Msg Len = %d\n",
me_cl->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->dev, "FW Client is amthi\n");
- if (!mei_cl_is_connected(&dev->iamthif_cl)) {
- rets = -ENODEV;
- goto end;
- }
- mei_cl_unlink(cl);
-
- kfree(cl);
- cl = NULL;
- dev->iamthif_open_count++;
- file->private_data = &dev->iamthif_cl;
-
- client = &data->out_client_properties;
- client->max_msg_length = me_cl->props.max_msg_length;
- client->protocol_version = me_cl->props.protocol_version;
- rets = dev->iamthif_cl.status;
-
- goto end;
- }
-
/* prepare the output buffer */
client = &data->out_client_properties;
client->max_msg_length = me_cl->props.max_msg_length;
mask |= POLLPRI;
}
- if (cl == &dev->iamthif_cl) {
- mask |= mei_amthif_poll(file, wait);
- goto out;
- }
-
if (req_events & (POLLIN | POLLRDNORM)) {
poll_wait(file, &cl->rx_wait, wait);
#include "hw.h"
#include "hbm.h"
-
-/*
- * AMTHI Client UUID
- */
-extern const uuid_le mei_amthif_guid;
-
#define MEI_RD_MSG_BUF_SIZE (128 * sizeof(u32))
/*
const char *mei_dev_state_str(int state);
-enum iamthif_states {
- MEI_IAMTHIF_IDLE,
- MEI_IAMTHIF_WRITING,
- MEI_IAMTHIF_READING,
-};
-
enum mei_file_transaction_states {
MEI_IDLE,
MEI_WRITING,
* @allow_fixed_address: allow user space to connect a fixed client
* @override_fixed_address: force allow fixed address behavior
*
- * @amthif_cmd_list : amthif list for cmd waiting
- * @iamthif_cl : amthif host client
- * @iamthif_open_count : number of opened amthif connections
- * @iamthif_stall_timer : timer to detect amthif hang
- * @iamthif_state : amthif processor state
- * @iamthif_canceled : current amthif command is canceled
- *
* @reset_work : work item for the device reset
* @bus_rescan_work : work item for the bus rescan
*
bool allow_fixed_address;
bool override_fixed_address;
- /* amthif list for cmd waiting */
- struct list_head amthif_cmd_list;
- struct mei_cl iamthif_cl;
- long iamthif_open_count;
- u32 iamthif_stall_timer;
- enum iamthif_states iamthif_state;
- bool iamthif_canceled;
-
struct work_struct reset_work;
struct work_struct bus_rescan_work;
int mei_irq_write_handler(struct mei_device *dev, struct list_head *cmpl_list);
void mei_irq_compl_handler(struct mei_device *dev, struct list_head *cmpl_list);
-/*
- * AMTHIF - AMT Host Interface Functions
- */
-void mei_amthif_reset_params(struct mei_device *dev);
-
-int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl);
-
-unsigned int mei_amthif_poll(struct file *file, poll_table *wait);
-
-int mei_amthif_release(struct mei_device *dev, struct file *file);
-
-int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb);
-int mei_amthif_run_next_cmd(struct mei_device *dev);
-int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
- struct list_head *cmpl_list);
-
-void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
-int mei_amthif_irq_read_msg(struct mei_cl *cl,
- struct mei_msg_hdr *mei_hdr,
- struct list_head *cmpl_list);
-int mei_amthif_irq_read(struct mei_device *dev, s32 *slots);
-
/*
* Register Access Function
*/
bool mei_write_is_idle(struct mei_device *dev);
-void mei_irq_discard_msg(struct mei_device *dev, struct mei_msg_hdr *hdr);
-
#if IS_ENABLED(CONFIG_DEBUG_FS)
int mei_dbgfs_register(struct mei_device *dev, const char *name);
void mei_dbgfs_deregister(struct mei_device *dev);
projects / users / willy / pagecache.git / commitdiff