linux_dsm_epyc7002/drivers/misc/mei/main.c

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staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
* Copyright (c) 2003-2012, Intel Corporation.
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*
* 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/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/slab.h>
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
#include <linux/fs.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/sched.h>
#include <linux/uuid.h>
#include <linux/compat.h>
#include <linux/jiffies.h>
#include <linux/interrupt.h>
#include <linux/mei.h>
#include "mei_dev.h"
#include "client.h"
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
/**
* mei_open - the open function
*
* @inode: pointer to inode structure
* @file: pointer to file structure
*
* Return: 0 on success, <0 on error
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*/
static int mei_open(struct inode *inode, struct file *file)
{
struct mei_device *dev;
struct mei_cl *cl;
int err;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
dev = container_of(inode->i_cdev, struct mei_device, cdev);
if (!dev)
return -ENODEV;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
dev_dbg(dev->dev, "dev_state != MEI_ENABLED dev_state = %s\n",
mei_dev_state_str(dev->dev_state));
err = -ENODEV;
goto err_unlock;
}
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
cl = mei_cl_alloc_linked(dev);
if (IS_ERR(cl)) {
err = PTR_ERR(cl);
goto err_unlock;
}
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
cl->fp = file;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
file->private_data = cl;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_unlock(&dev->device_lock);
return nonseekable_open(inode, file);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
err_unlock:
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_unlock(&dev->device_lock);
return err;
}
/**
* mei_release - the release function
*
* @inode: pointer to inode structure
* @file: pointer to file structure
*
* Return: 0 on success, <0 on error
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*/
static int mei_release(struct inode *inode, struct file *file)
{
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
int rets;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
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);
cl_dbg(dev, cl, "removing\n");
mei_cl_unlink(cl);
file->private_data = NULL;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
kfree(cl);
out:
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_unlock(&dev->device_lock);
return rets;
}
/**
* mei_read - the read function.
*
* @file: pointer to file structure
* @ubuf: pointer to user buffer
* @length: buffer length
* @offset: data offset in buffer
*
* Return: >=0 data length on success , <0 on error
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*/
static ssize_t mei_read(struct file *file, char __user *ubuf,
size_t length, loff_t *offset)
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
{
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
struct mei_cl_cb *cb = NULL;
bool nonblock = !!(file->f_flags & O_NONBLOCK);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
int rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
rets = -ENODEV;
goto out;
}
if (length == 0) {
rets = 0;
goto out;
}
if (ubuf == NULL) {
rets = -EMSGSIZE;
goto out;
}
cb = mei_cl_read_cb(cl, file);
if (cb)
goto copy_buffer;
if (*offset > 0)
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*offset = 0;
rets = mei_cl_read_start(cl, length, file);
if (rets && rets != -EBUSY) {
cl_dbg(dev, cl, "mei start read failure status = %d\n", rets);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
goto out;
}
if (nonblock) {
rets = -EAGAIN;
goto out;
}
if (rets == -EBUSY &&
!mei_cl_enqueue_ctrl_wr_cb(cl, length, MEI_FOP_READ, file)) {
rets = -ENOMEM;
goto out;
}
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
do {
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_unlock(&dev->device_lock);
if (wait_event_interruptible(cl->rx_wait,
(!list_empty(&cl->rd_completed)) ||
(!mei_cl_is_connected(cl)))) {
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
if (signal_pending(current))
return -EINTR;
return -ERESTARTSYS;
}
mutex_lock(&dev->device_lock);
if (!mei_cl_is_connected(cl)) {
rets = -ENODEV;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
goto out;
}
cb = mei_cl_read_cb(cl, file);
} while (!cb);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
copy_buffer:
/* now copy the data to user space */
if (cb->status) {
rets = cb->status;
cl_dbg(dev, cl, "read operation failed %d\n", rets);
goto free;
}
cl_dbg(dev, cl, "buf.size = %zu buf.idx = %zu offset = %lld\n",
cb->buf.size, cb->buf_idx, *offset);
if (*offset >= cb->buf_idx) {
rets = 0;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
goto free;
}
/* length is being truncated to PAGE_SIZE,
* however buf_idx may point beyond that */
length = min_t(size_t, length, cb->buf_idx - *offset);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
if (copy_to_user(ubuf, cb->buf.data + *offset, length)) {
dev_dbg(dev->dev, "failed to copy data to userland\n");
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
rets = -EFAULT;
goto free;
}
rets = length;
*offset += length;
/* not all data was read, keep the cb */
if (*offset < cb->buf_idx)
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
goto out;
free:
mei_io_cb_free(cb);
*offset = 0;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
out:
cl_dbg(dev, cl, "end mei read rets = %d\n", rets);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_unlock(&dev->device_lock);
return rets;
}
/**
* mei_write - the write function.
*
* @file: pointer to file structure
* @ubuf: pointer to user buffer
* @length: buffer length
* @offset: data offset in buffer
*
* Return: >=0 data length on success , <0 on error
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*/
static ssize_t mei_write(struct file *file, const char __user *ubuf,
size_t length, loff_t *offset)
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
{
struct mei_cl *cl = file->private_data;
struct mei_cl_cb *cb;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
struct mei_device *dev;
int rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
rets = -ENODEV;
goto out;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
}
if (!mei_cl_is_connected(cl)) {
cl_err(dev, cl, "is not connected");
rets = -ENODEV;
goto out;
}
if (!mei_me_cl_is_active(cl->me_cl)) {
rets = -ENOTTY;
goto out;
}
if (length > mei_cl_mtu(cl)) {
rets = -EFBIG;
goto out;
}
if (length == 0) {
rets = 0;
goto out;
}
*offset = 0;
cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, file);
if (!cb) {
rets = -ENOMEM;
goto out;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
}
rets = copy_from_user(cb->buf.data, ubuf, length);
if (rets) {
dev_dbg(dev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
mei_io_cb_free(cb);
goto out;
}
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
if (cl == &dev->iamthif_cl) {
rets = mei_amthif_write(cl, cb);
if (!rets)
rets = length;
goto out;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
}
rets = mei_cl_write(cl, cb);
out:
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_unlock(&dev->device_lock);
return rets;
}
/**
* mei_ioctl_connect_client - the connect to fw client IOCTL function
*
* @file: private data of the file object
* @data: IOCTL connect data, input and output parameters
*
* Locking: called under "dev->device_lock" lock
*
* Return: 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_me_client *me_cl;
struct mei_cl *cl;
int rets;
cl = file->private_data;
dev = cl->dev;
if (dev->dev_state != MEI_DEV_ENABLED)
return -ENODEV;
if (cl->state != MEI_FILE_INITIALIZING &&
cl->state != MEI_FILE_DISCONNECTED)
return -EBUSY;
/* find ME client we're trying to connect to */
me_cl = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
if (!me_cl) {
dev_dbg(dev->dev, "Cannot connect to FW Client UUID = %pUl\n",
&data->in_client_uuid);
rets = -ENOTTY;
goto end;
}
if (me_cl->props.fixed_address) {
bool forbidden = dev->override_fixed_address ?
!dev->allow_fixed_address : !dev->hbm_f_fa_supported;
if (forbidden) {
dev_dbg(dev->dev, "Connection forbidden to FW Client UUID = %pUl\n",
&data->in_client_uuid);
rets = -ENOTTY;
goto end;
}
}
dev_dbg(dev->dev, "Connect to FW Client ID = %d\n",
me_cl->client_id);
dev_dbg(dev->dev, "FW Client - Protocol Version = %d\n",
me_cl->props.protocol_version);
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;
client->protocol_version = me_cl->props.protocol_version;
dev_dbg(dev->dev, "Can connect?\n");
rets = mei_cl_connect(cl, me_cl, file);
end:
mei_me_cl_put(me_cl);
return rets;
}
/**
* mei_ioctl_client_notify_request -
* propagate event notification request to client
*
* @file: pointer to file structure
* @request: 0 - disable, 1 - enable
*
* Return: 0 on success , <0 on error
*/
static int mei_ioctl_client_notify_request(const struct file *file, u32 request)
{
struct mei_cl *cl = file->private_data;
if (request != MEI_HBM_NOTIFICATION_START &&
request != MEI_HBM_NOTIFICATION_STOP)
return -EINVAL;
return mei_cl_notify_request(cl, file, (u8)request);
}
/**
* mei_ioctl_client_notify_get - wait for notification request
*
* @file: pointer to file structure
* @notify_get: 0 - disable, 1 - enable
*
* Return: 0 on success , <0 on error
*/
static int mei_ioctl_client_notify_get(const struct file *file, u32 *notify_get)
{
struct mei_cl *cl = file->private_data;
bool notify_ev;
bool block = (file->f_flags & O_NONBLOCK) == 0;
int rets;
rets = mei_cl_notify_get(cl, block, &notify_ev);
if (rets)
return rets;
*notify_get = notify_ev ? 1 : 0;
return 0;
}
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
/**
* mei_ioctl - the IOCTL function
*
* @file: pointer to file structure
* @cmd: ioctl command
* @data: pointer to mei message structure
*
* Return: 0 on success , <0 on error
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*/
static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
{
struct mei_device *dev;
struct mei_cl *cl = file->private_data;
struct mei_connect_client_data connect_data;
u32 notify_get, notify_req;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
int rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
dev_dbg(dev->dev, "IOCTL cmd = 0x%x", cmd);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
rets = -ENODEV;
goto out;
}
switch (cmd) {
case IOCTL_MEI_CONNECT_CLIENT:
dev_dbg(dev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n");
if (copy_from_user(&connect_data, (char __user *)data,
sizeof(struct mei_connect_client_data))) {
dev_dbg(dev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
goto out;
}
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
rets = mei_ioctl_connect_client(file, &connect_data);
if (rets)
goto out;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
/* if all is ok, copying the data back to user. */
if (copy_to_user((char __user *)data, &connect_data,
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
sizeof(struct mei_connect_client_data))) {
dev_dbg(dev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
goto out;
}
break;
case IOCTL_MEI_NOTIFY_SET:
dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_SET.\n");
if (copy_from_user(&notify_req,
(char __user *)data, sizeof(notify_req))) {
dev_dbg(dev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
goto out;
}
rets = mei_ioctl_client_notify_request(file, notify_req);
break;
case IOCTL_MEI_NOTIFY_GET:
dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_GET.\n");
rets = mei_ioctl_client_notify_get(file, &notify_get);
if (rets)
goto out;
dev_dbg(dev->dev, "copy connect data to user\n");
if (copy_to_user((char __user *)data,
&notify_get, sizeof(notify_get))) {
dev_dbg(dev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
goto out;
}
break;
default:
dev_err(dev->dev, ": unsupported ioctl %d.\n", cmd);
rets = -ENOIOCTLCMD;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
}
out:
mutex_unlock(&dev->device_lock);
return rets;
}
/**
* mei_compat_ioctl - the compat IOCTL function
*
* @file: pointer to file structure
* @cmd: ioctl command
* @data: pointer to mei message structure
*
* Return: 0 on success , <0 on error
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*/
#ifdef CONFIG_COMPAT
static long mei_compat_ioctl(struct file *file,
unsigned int cmd, unsigned long data)
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
{
return mei_ioctl(file, cmd, (unsigned long)compat_ptr(data));
}
#endif
/**
* mei_poll - the poll function
*
* @file: pointer to file structure
* @wait: pointer to poll_table structure
*
* Return: poll mask
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
*/
static unsigned int mei_poll(struct file *file, poll_table *wait)
{
unsigned long req_events = poll_requested_events(wait);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
unsigned int mask = 0;
bool notify_en;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
if (WARN_ON(!cl || !cl->dev))
return POLLERR;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
dev = cl->dev;
mutex_lock(&dev->device_lock);
notify_en = cl->notify_en && (req_events & POLLPRI);
if (dev->dev_state != MEI_DEV_ENABLED ||
!mei_cl_is_connected(cl)) {
mask = POLLERR;
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
goto out;
}
if (notify_en) {
poll_wait(file, &cl->ev_wait, wait);
if (cl->notify_ev)
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);
if (!list_empty(&cl->rd_completed))
mask |= POLLIN | POLLRDNORM;
else
mei_cl_read_start(cl, mei_cl_mtu(cl), file);
}
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
out:
mutex_unlock(&dev->device_lock);
return mask;
}
/**
* mei_fasync - asynchronous io support
*
* @fd: file descriptor
* @file: pointer to file structure
* @band: band bitmap
*
* Return: negative on error,
* 0 if it did no changes,
* and positive a process was added or deleted
*/
static int mei_fasync(int fd, struct file *file, int band)
{
struct mei_cl *cl = file->private_data;
if (!mei_cl_is_connected(cl))
return -ENODEV;
return fasync_helper(fd, file, band, &cl->ev_async);
}
/**
* fw_status_show - mei device fw_status attribute show method
*
* @device: device pointer
* @attr: attribute pointer
* @buf: char out buffer
*
* Return: number of the bytes printed into buf or error
*/
static ssize_t fw_status_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct mei_device *dev = dev_get_drvdata(device);
struct mei_fw_status fw_status;
int err, i;
ssize_t cnt = 0;
mutex_lock(&dev->device_lock);
err = mei_fw_status(dev, &fw_status);
mutex_unlock(&dev->device_lock);
if (err) {
dev_err(device, "read fw_status error = %d\n", err);
return err;
}
for (i = 0; i < fw_status.count; i++)
cnt += scnprintf(buf + cnt, PAGE_SIZE - cnt, "%08X\n",
fw_status.status[i]);
return cnt;
}
static DEVICE_ATTR_RO(fw_status);
/**
* hbm_ver_show - display HBM protocol version negotiated with FW
*
* @device: device pointer
* @attr: attribute pointer
* @buf: char out buffer
*
* Return: number of the bytes printed into buf or error
*/
static ssize_t hbm_ver_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct mei_device *dev = dev_get_drvdata(device);
struct hbm_version ver;
mutex_lock(&dev->device_lock);
ver = dev->version;
mutex_unlock(&dev->device_lock);
return sprintf(buf, "%u.%u\n", ver.major_version, ver.minor_version);
}
static DEVICE_ATTR_RO(hbm_ver);
/**
* hbm_ver_drv_show - display HBM protocol version advertised by driver
*
* @device: device pointer
* @attr: attribute pointer
* @buf: char out buffer
*
* Return: number of the bytes printed into buf or error
*/
static ssize_t hbm_ver_drv_show(struct device *device,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%u.%u\n", HBM_MAJOR_VERSION, HBM_MINOR_VERSION);
}
static DEVICE_ATTR_RO(hbm_ver_drv);
static struct attribute *mei_attrs[] = {
&dev_attr_fw_status.attr,
&dev_attr_hbm_ver.attr,
&dev_attr_hbm_ver_drv.attr,
NULL
};
ATTRIBUTE_GROUPS(mei);
/*
* file operations structure will be used for mei char device.
*/
static const struct file_operations mei_fops = {
.owner = THIS_MODULE,
.read = mei_read,
.unlocked_ioctl = mei_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = mei_compat_ioctl,
#endif
.open = mei_open,
.release = mei_release,
.write = mei_write,
.poll = mei_poll,
.fasync = mei_fasync,
.llseek = no_llseek
};
static struct class *mei_class;
static dev_t mei_devt;
#define MEI_MAX_DEVS MINORMASK
static DEFINE_MUTEX(mei_minor_lock);
static DEFINE_IDR(mei_idr);
/**
* mei_minor_get - obtain next free device minor number
*
* @dev: device pointer
*
* Return: allocated minor, or -ENOSPC if no free minor left
*/
static int mei_minor_get(struct mei_device *dev)
{
int ret;
mutex_lock(&mei_minor_lock);
ret = idr_alloc(&mei_idr, dev, 0, MEI_MAX_DEVS, GFP_KERNEL);
if (ret >= 0)
dev->minor = ret;
else if (ret == -ENOSPC)
dev_err(dev->dev, "too many mei devices\n");
mutex_unlock(&mei_minor_lock);
return ret;
}
/**
* mei_minor_free - mark device minor number as free
*
* @dev: device pointer
*/
static void mei_minor_free(struct mei_device *dev)
{
mutex_lock(&mei_minor_lock);
idr_remove(&mei_idr, dev->minor);
mutex_unlock(&mei_minor_lock);
}
int mei_register(struct mei_device *dev, struct device *parent)
{
struct device *clsdev; /* class device */
int ret, devno;
ret = mei_minor_get(dev);
if (ret < 0)
return ret;
/* Fill in the data structures */
devno = MKDEV(MAJOR(mei_devt), dev->minor);
cdev_init(&dev->cdev, &mei_fops);
dev->cdev.owner = parent->driver->owner;
/* Add the device */
ret = cdev_add(&dev->cdev, devno, 1);
if (ret) {
dev_err(parent, "unable to add device %d:%d\n",
MAJOR(mei_devt), dev->minor);
goto err_dev_add;
}
clsdev = device_create_with_groups(mei_class, parent, devno,
dev, mei_groups,
"mei%d", dev->minor);
if (IS_ERR(clsdev)) {
dev_err(parent, "unable to create device %d:%d\n",
MAJOR(mei_devt), dev->minor);
ret = PTR_ERR(clsdev);
goto err_dev_create;
}
ret = mei_dbgfs_register(dev, dev_name(clsdev));
if (ret) {
dev_err(clsdev, "cannot register debugfs ret = %d\n", ret);
goto err_dev_dbgfs;
}
return 0;
err_dev_dbgfs:
device_destroy(mei_class, devno);
err_dev_create:
cdev_del(&dev->cdev);
err_dev_add:
mei_minor_free(dev);
return ret;
}
EXPORT_SYMBOL_GPL(mei_register);
void mei_deregister(struct mei_device *dev)
{
int devno;
devno = dev->cdev.dev;
cdev_del(&dev->cdev);
mei_dbgfs_deregister(dev);
device_destroy(mei_class, devno);
mei_minor_free(dev);
}
EXPORT_SYMBOL_GPL(mei_deregister);
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00
static int __init mei_init(void)
{
int ret;
mei_class = class_create(THIS_MODULE, "mei");
if (IS_ERR(mei_class)) {
pr_err("couldn't create class\n");
ret = PTR_ERR(mei_class);
goto err;
}
ret = alloc_chrdev_region(&mei_devt, 0, MEI_MAX_DEVS, "mei");
if (ret < 0) {
pr_err("unable to allocate char dev region\n");
goto err_class;
}
ret = mei_cl_bus_init();
if (ret < 0) {
pr_err("unable to initialize bus\n");
goto err_chrdev;
}
return 0;
err_chrdev:
unregister_chrdev_region(mei_devt, MEI_MAX_DEVS);
err_class:
class_destroy(mei_class);
err:
return ret;
}
static void __exit mei_exit(void)
{
unregister_chrdev_region(mei_devt, MEI_MAX_DEVS);
class_destroy(mei_class);
mei_cl_bus_exit();
}
module_init(mei_init);
module_exit(mei_exit);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
MODULE_LICENSE("GPL v2");
staging/mei: PCI device and char driver support. contains module entries and PCI driver and char device definitions (using file_operations, pci_driver struts). The HW interface is exposed on PCI interface. PCI: The MEI HW resources are memory map 32 bit registers (Host and ME Status Registers and Data Registers) and interrupt (shared, with Intel GFX on some chipsets and USB2 controller on others). The device is part of the chipsets and cannot be hotplugged. The MEI device present is determined by BIOS configuration. Probe: The driver starts the init MEI flow, that is explained in the patch "MEI driver init flow" [06/10], then schedules a timer that handles timeouts and watchdog heartbeats. Remove: The driver closes all connections and stops the watchdog. The driver expose char device that supports: open, release, write, read, ioctl, poll. Open: Upon open the driver allocates HOST data structure on behalf of application which will resides in the file's private data and assign a host ID number which will identify messages between driver client instance and MEI client. The driver also checks readiness of the device. The number of simultaneously opened instances is limited to 253. (255 - (amthi + watchdog)) Release: In release the driver sends a Disconnect Command to ME feature and clean all the data structs. IOCTL: MEI adds new IOCTL: (IOCTL_MEI_CONNECT_CLIENT) The IOCTL links the current file descriptor to ME feature. This is done by sending MEI Bus command: 'hbm_client_connect_request' to the ME and waiting for an answer :'hbm_client_connect_response'. Upon answer reception the driver updates its and HOST data structures in file structure to indicate that the file descriptor is associated to ME feature. Each ME feature is represented by UUID which is given as an input parameter to the IOCTL, upon success connect command the IOCTL will return the ME feature properties. ME can reject CONNECT commands due to several reasons, most common are: Invalid UUID ME or feature does not exists in ME. No More Connection allowed to this is feature, usually only one connection is allowed. Write: Upon write, the driver splits the user data into several MEI messages up to 512 bytes each and sends it to the HW. If the user wants to write data to AMTHI ME feature then the drivers routes the messages through AMTHI queues. Read: In read the driver checks is a connection exists to current file descriptor and then wait until a data is available. Message might be received (by interrupt from ME) in multiple chunks. Only complete message is released to the application. Poll: Nothing special here. Waiting for see if we have data available for reading. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-15 17:43:41 +07:00