diff options
Diffstat (limited to 'drivers/staging/unisys')
| -rw-r--r-- | drivers/staging/unisys/Documentation/ABI/sysfs-platform-visorchipset | 89 | ||||
| -rw-r--r-- | drivers/staging/unisys/Documentation/overview.txt | 337 | ||||
| -rw-r--r-- | drivers/staging/unisys/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/staging/unisys/MAINTAINERS | 5 | ||||
| -rw-r--r-- | drivers/staging/unisys/Makefile | 7 | ||||
| -rw-r--r-- | drivers/staging/unisys/TODO | 16 | ||||
| -rw-r--r-- | drivers/staging/unisys/include/iochannel.h | 571 | ||||
| -rw-r--r-- | drivers/staging/unisys/visorhba/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/staging/unisys/visorhba/Makefile | 10 | ||||
| -rw-r--r-- | drivers/staging/unisys/visorhba/visorhba_main.c | 1142 | ||||
| -rw-r--r-- | drivers/staging/unisys/visorinput/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/staging/unisys/visorinput/Makefile | 7 | ||||
| -rw-r--r-- | drivers/staging/unisys/visorinput/visorinput.c | 787 | ||||
| -rw-r--r-- | drivers/staging/unisys/visornic/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/staging/unisys/visornic/Makefile | 10 | ||||
| -rw-r--r-- | drivers/staging/unisys/visornic/visornic_main.c | 2150 |
16 files changed, 0 insertions, 5194 deletions
diff --git a/drivers/staging/unisys/Documentation/ABI/sysfs-platform-visorchipset b/drivers/staging/unisys/Documentation/ABI/sysfs-platform-visorchipset deleted file mode 100644 index c2359de17eaf..000000000000 --- a/drivers/staging/unisys/Documentation/ABI/sysfs-platform-visorchipset +++ /dev/null @@ -1,89 +0,0 @@ -This file describes sysfs entries beneath /devices/platform/visorchipset. - -What: install/error -Date: 7/18/2014 -KernelVersion: TBD -Contact: sparmaintainer@unisys.com -Description: used to send the ID of a string that should be displayed on - s-Par's automatic installation progress screen when an error - is encountered during installation. This field has no effect - if not in installation mode. -Users: sparmaintainer@unisys.com - -What: install/remainingsteps -Date: 7/18/2014 -KernelVersion: TBD -Contact: sparmaintainer@unisys.com -Description: used to set the value of the progress bar on the s-Par automatic - installation progress screen. This field has no effect if not in - installation mode. -Users: sparmaintainer@unisys.com - -What: install/textid -Date: 7/18/2014 -KernelVersion: TBD -Contact: sparmaintainer@unisys.com -Description: used to send the ID of a string that should be displayed on - s-Par's automatic installation progress screen. Setting this - field when not in installation mode (boottotool was set on - the previous guest boot) has no effect. -Users: sparmaintainer@unisys.com - -What: install/boottotool -Date: 7/18/2014 -KernelVersion: TBD -Contact: sparmaintainer@unisys.com -Description: The boottotool flag controls s-Par behavior on the next boot of - this guest. Setting the flag will cause the guest to boot from - the utility and installation image, which will use the value in - the toolaction field to determine what operation is being - requested. -Users: sparmaintainer@unisys.com - -What: install/toolaction -Date: 7/18/2014 -KernelVersion: TBD -Contact: sparmaintainer@unisys.com -Description: This field is used to tell s-Par which type of recovery tool - action to perform on the next guest boot-up. The meaning of the - value is dependent on the type of installation software used to - commission the guest. -Users: sparmaintainer@unisys.com - -What: parahotplug/deviceenabled -Date: 7/18/2014 -KernelVersion: TBD -Contact: sparmaintainer@unisys.com -Description: This entry is used by a Unisys support script installed on the - guest, and triggered by a udev event. The support script is - responsible for enabling and disabling SR-IOV devices when the - PF device is being recovered in another guest. - - Some SR-IOV devices have problems when the PF is reset without - first disabling all VFs attached to that PF. s-Par handles this - situation by sending a message to guests using these VFs, and - the script will disable the device. When the PF is recovered, - another message is sent to the guests to re-enable the VFs. - - The parahotplug/deviceenabled interface is used to acknowledge - the recovery message. -Users: sparmaintainer@unisys.com - -What: parahotplug/devicedisabled -Date: 7/18/2014 -KernelVersion: TBD -Contact: sparmaintainer@unisys.com -Description: This entry is used by a Unisys support script installed on the - guest, and triggered by a udev event. The support script is - responsible for enabling and disabling SR-IOV devices when the - PF device is being recovered in another guest. - - Some SR-IOV devices have problems when the PF is reset without - first disabling all VFs attached to that PF. s-Par handles this - situation by sending a message to guests using these VFs, and - the script will disable the device. When the PF is recovered, - another message is sent to the guests to re-enable the VFs. - - The parahotplug/devicedisaabled interface is used to acknowledge - the initial recovery message. -Users: sparmaintainer@unisys.com diff --git a/drivers/staging/unisys/Documentation/overview.txt b/drivers/staging/unisys/Documentation/overview.txt deleted file mode 100644 index cf29f884cbe0..000000000000 --- a/drivers/staging/unisys/Documentation/overview.txt +++ /dev/null @@ -1,337 +0,0 @@ -1. Overview ------------ - -This document describes the driver set for Unisys Secure Partitioning -(s-Par(R)). - -s-Par is firmware that provides hardware partitioning capabilities for -splitting large-scale Intel x86 servers into multiple isolated -partitions. s-Par provides a set of para-virtualized device drivers to -allow guest partitions on the same server to share devices that would -normally be unsharable, specifically: - -* visornic - network interface -* visorhba - scsi disk adapter -* visorinput - keyboard and mouse - -These drivers conform to the standard Linux bus/device model described -within Documentation/driver-api/driver-model/, and utilize a driver named -visorbus to present the virtual busses involved. Drivers in the 'visor*' -driver set are commonly referred to as "guest drivers" or "client drivers". -All drivers except visorbus expose a device of a specific usable class to the -Linux guest environment (e.g., block, network, or input), and are collectively -referred to as "function drivers". - -The back-end for each device is owned and managed by a small, -single-purpose service partition in the s-Par firmware, which communicates -with each guest partition sharing that device through an area of shared memory -called a "channel". In s-Par nomenclature, the back-end is often referred to -as the "service partition", "IO partition" (for virtual network and scsi disk -devices), or "console partition" (for virtual keyboard and mouse devices). - -Each virtual device requires exactly 1 dedicated channel, which the guest -driver and back-end use to communicate. The hypervisor need not intervene -(other than normal interrupt handling) in the interactions that occur across -this channel. - -NOT covered in this document: - -* s-Par also supports sharing physical PCI adapters via SR-IOV, but - because this requires no specific support in the guest partitions, it will - not be discussed in this document. Shared SR-IOV devices should be used - wherever possible for highest performance. - -* Because the s-Par back-end provides a standard EFI framebuffer to each - guest, the already-existing efifb Linux driver is used to provide guest - video access. Thus, the only s-Par-unique support that is necessary to - provide a guest graphics console are for keyboard and mouse (via visorinput). - - -2. Driver Descriptions ----------------------- - -2.1. visorbus -------------- - -2.1.1. Overview ---------------- - -The visorbus driver handles the virtual busses on which all of the virtual -devices reside. It provides a registration function named -visorbus_register_visor_driver() that is called by each of the function -drivers at initialization time, which the function driver uses to tell -visorbus about the device classes (via specifying a list of device type -GUIDs) it wants to handle. For use by function drivers, visorbus provides -implementation for struct visor_driver and struct visor_device, as well -as utility functions for communicating with the back-end. - -visorbus is associated with ACPI id "PNP0A07" in modules.alias, so if built -as a module it will typically be loaded automatically via standard udev or -systemd (God help us) configurations. - -visorbus can similarly force auto-loading of function drivers for virtual -devices it discovers, as it includes a MODALIAS environment variable of this -form in the hotplug uevent environment when each virtual device is -discovered: - - visorbus:<device type GUID> - -visorbus notifies each function driver when a device of its registered class -arrives and departs, by calling the function driver's probe() and remove() -methods. - -The actual struct device objects that correspond to each virtual bus and -each virtual device are created and owned by visorbus. These device objects -are created in response to messages from the s-Par back-end received on a -special control channel called the "controlvm channel" (each guest partition -has access to exactly 1 controlvm channel), and have a lifetime that is -independent of the function drivers that control them. - -2.1.2. "struct visor device" Function Driver Interfaces -------------------------------------------------------- - -The interface between visorbus and its function drivers is defined in -visorbus.h, and described below. - -When a visor function driver loads, it calls visorbus_register_visor_driver() -to register itself with visorbus. The significant information passed in this -exchange is as follows: - -* the GUID(s) of the channel type(s) that are handled by this driver, as - well as a "friendly name" identifying each (this will be published under - /sys/devices/visorbus<x>/dev<y>) - -* the addresses of callback functions to be called whenever a virtual - device/channel with the appropriate channel-type GUID(s) appears or - disappears - -* the address of a "channel_interrupt" function, which will be automatically - called at specific intervals to enable the driver to poll the device - channel for activity - -The following functions implemented within each function driver will be -called automatically by the visorbus driver at appropriate times: - -* The probe() function notifies about the creation of each new virtual - device/channel instance. - -* The remove() function notifies about the destruction of a virtual - device/channel instance. - -* The channel_interrupt() function is called at frequent intervals to - give the function driver an opportunity to poll the virtual device channel - for requests. Information is passed to this function to enable the - function driver to use the visorchannel_signalinsert() and - visorchannel_signalremove() functions to respond to and initiate activity - over the channel. (Note that since it is the visorbus driver that - determines when this is called, it is very easy to switch to - interrupt-driven mechanisms when available for particular virtual device - types.) - -* The pause() function is called should it ever be necessary to direct the - function driver to temporarily stop accessing the device channel. An - example of when this is needed is when the service partition implementing - the back-end of the virtual device needs to be recovered. After a - successful return of pause(), the function driver must not access the - device channel until a subsequent resume() occurs. - -* The resume() function is the "book-end" to pause(), and is described above. - -2.1.3. sysfs Advertised Information ------------------------------------ - -Because visorbus is a standard Linux bus driver in the model described in -Documentation/driver-api/driver-model/, the hierarchy of s-Par virtual devices is -published in the sysfs tree beneath /bus/visorbus/, e.g., -/sys/bus/visorbus/devices/ might look like: - - vbus1:dev1 -> ../../../devices/visorbus1/vbus1:dev1 - vbus1:dev2 -> ../../../devices/visorbus1/vbus1:dev2 - vbus1:dev3 -> ../../../devices/visorbus1/vbus1:dev3 - vbus2:dev0 -> ../../../devices/visorbus2/vbus2:dev0 - vbus2:dev1 -> ../../../devices/visorbus2/vbus2:dev1 - vbus2:dev2 -> ../../../devices/visorbus2/vbus2:dev2 - visorbus1 -> ../../../devices/visorbus1 - visorbus2 -> ../../../devices/visorbus2 - -visor_device notes: - -* Each visorbus<n> entry denotes the existence of a struct visor_device - denoting virtual bus #<n>. A unique s-Par channel exists for each such - virtual bus. - -* Virtual bus numbers uniquely identify s-Par back-end service partitions. - In this example, bus 1 corresponds to the s-Par console partition - (controls keyboard, video, and mouse), whereas bus 2 corresponds to the - s-Par IO partition (controls network and disk). - -* Each vbus<x>:dev<y> entry denotes the existence of a struct visor_device - denoting virtual device #<y> outboard of virtual bus #<x>. A unique s-Par - channel exists for each such virtual device. - -* If a function driver has loaded and claimed a particular device, the - bus/visorbus/devices/vbus<x>:dev<y>/driver symlink will indicate that - function driver. - -Every active visorbus device will have a sysfs subtree under: - - /sys/devices/visorbus<x>/vbus<x>:dev<y>/ - -The following files exist under /sys/devices/visorbus<x>/vbus<x>:dev<y>: - - subsystem link to sysfs tree that describes the - visorbus bus type; e.g.: - ../../../bus/visorbus - - driver link to sysfs tree that describes the - function driver controlling this device; - e.g.: - ../../../bus/visorbus/drivers/visorhba - Note that this "driver" link will not exist - if the appropriate function driver has not - been loaded yet. - - channel properties of the device channel (all in - ascii text format) - - clientpartition handle identifying the guest (client) side - of this channel, e.g. 0x10000000. - - nbytes total size of this channel in bytes - - physaddr the guest physical address for the base of - the channel - - typeguid a GUID identifying the channel type, in - xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx notation - - typename a "friendly name" for this channel type, e.g., - "keyboard". Note that this name is provided by - a particular function driver, so "typename" - will return an empty string until AFTER the - appropriate function driver controlling this - channel type is loaded - - zoneguid a GUID identifying the channel zone, in - xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx notation - - -2.2. visorhba -------------- - -The visorhba driver registers with visorbus as the function driver to -handle virtual scsi disk devices, specified using the -VISOR_VHBA_CHANNEL_GUID type in the visorbus_register_visor_driver() -call. visorhba uses scsi_add_host() to expose a Linux block device -(e.g., /sys/block/) in the guest environment for each s-Par virtual device. - -visorhba provides access to a shared SCSI host bus adapter and one or more -disk devices, by proxying SCSI commands between the guest and the service -partition that owns the shared SCSI adapter, using a channel between the -guest and the service partition. The disks that appear on the shared bus -are defined by the s-Par configuration and enforced by the service partition, -while the guest driver handles sending commands and handling responses. Each -disk is shared as a whole to a guest. Sharing the bus adapter in this way -provides resiliency; should the device encounter an error, only the service -partition is rebooted, and the device is reinitialized. This allows -guests to continue running and to recover from the error. - -When compiled as a module, visorhba can be autoloaded by visorbus in -standard udev/systemd environments, as it includes the modules.alias -definition: - - "visorbus:"+VISOR_VHBA_CHANNEL_GUID_STR - -i.e.: - - alias visorbus:414815ed-c58c-11da-95a9-00e08161165f visorhba - - -2.3. visornic -------------- - -The visornic driver registers with visorbus as the function driver to -handle virtual network devices, specified using the -VISOR_VNIC_CHANNEL_GUID type in the visorbus_register_visor_driver() -call. visornic uses register_netdev() to expose a Linux device of class net -(e.g., /sys/class/net/) in the guest environment for each s-Par virtual -device. - -visornic provides a paravirtualized network interface to a -guest by proxying buffer information between the guest and the service -partition that owns the shared network interface, using a channel -between the guest and the service partition. The connectivity of this -interface with the shared interface and possibly other guest -partitions is defined by the s-Par configuration and enforced by the -service partition; the guest driver handles communication and link -status. - -When compiled as a module, visornic can be autoloaded by visorbus in -standard udev/systemd environments, as it includes the modules.alias -definition: - - "visorbus:"+VISOR_VNIC_CHANNEL_GUID_STR - -i.e.: - - alias visorbus:8cd5994d-c58e-11da-95a9-00e08161165f visornic - - -2.4. visorinput ---------------- - -The visorinput driver registers with visorbus as the function driver to -handle human input devices, specified using the -VISOR_KEYBOARD_CHANNEL_GUID and VISOR_MOUSE_CHANNEL_GUID -types in the visorbus_register_visor_driver() call. visorinput uses -input_register_device() to expose devices of class input -(e.g., /sys/class/input/) for virtual keyboard and virtual mouse devices. -A s-Par virtual keyboard device maps 1-to-1 with a Linux input device -named "visor Keyboard", while a s-Par virtual mouse device has 2 Linux input -devices created for it: 1 named "visor Wheel", and 1 named "visor Mouse". - -By registering as input class devices, modern versions of X will -automatically find and properly use s-Par virtual keyboard and mouse devices. -As the s-Par back-end reports keyboard and mouse activity via events on the -virtual device channel, the visorinput driver delivers the activity to the -Linux environment by calling input_report_key() and input_report_abs(). - -You can interact with the guest console using the usyscon Partition Desktop -(a.k.a., "pd") application, provided as part of s-Par. After installing the -usyscon Partition Desktop into a Linux environment via the -usyscon_partitiondesktop-*.rpm, or into a Windows environment via -PartitionDesktop.msi, you will be able to launch a console for your guest -Linux environment by clicking the console icon in the s-Par web UI. - -When compiled as a module, visorinput can be autoloaded by visorbus in -standard udev/systemd environments, as it includes the modules.alias -definition: - - "visorbus:"+VISOR_MOUSE_CHANNEL_GUID_STR - "visorbus:"+VISOR_KEYBOARD_CHANNEL_GUID_STR - -i.e.: - - alias visorbus:c73416d0-b0b8-44af-b304-9d2ae99f1b3d visorinput - alias visorbus:addf07d4-94a9-46e2-81c3-61abcdbdbd87 visorinput - - -3. Minimum Required Driver Set ------------------------------- - -visorbus is required for every Linux guest running under s-Par. - -visorhba is typically required for a Linux guest running under s-Par, as it -is required if your guest boot disk is a virtual device provided by the s-Par -back-end, which is the default configuration. However, for advanced -configurations where the Linux guest boots via an SR-IOV-provided HBA or -SAN disk for example, visorhba is not technically required. - -visornic is typically required for a Linux guest running under s-Par, as it -is required if your guest network interface is a virtual device provided by -the s-Par back-end, which is the default configuration. However, for -configurations where the Linux guest is provided with an SR-IOV NIC -for example, visornic is not technically required. - -visorinput is only required for a Linux guest running under s-Par if you -require graphics-mode access to your guest console. diff --git a/drivers/staging/unisys/Kconfig b/drivers/staging/unisys/Kconfig deleted file mode 100644 index 43fe1ce538e1..000000000000 --- a/drivers/staging/unisys/Kconfig +++ /dev/null @@ -1,16 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Unisys SPAR driver configuration -# -menuconfig UNISYSSPAR - bool "Unisys SPAR driver support" - help - Support for the Unisys SPAR drivers - -if UNISYSSPAR - -source "drivers/staging/unisys/visornic/Kconfig" -source "drivers/staging/unisys/visorinput/Kconfig" -source "drivers/staging/unisys/visorhba/Kconfig" - -endif # UNISYSSPAR diff --git a/drivers/staging/unisys/MAINTAINERS b/drivers/staging/unisys/MAINTAINERS deleted file mode 100644 index aaddc619c329..000000000000 --- a/drivers/staging/unisys/MAINTAINERS +++ /dev/null @@ -1,5 +0,0 @@ -Unisys s-Par drivers -M: David Kershner <sparmaintainer@unisys.com> -S: Maintained -F: drivers/staging/unisys/Documentation/overview.txt -F: drivers/staging/unisys/ diff --git a/drivers/staging/unisys/Makefile b/drivers/staging/unisys/Makefile deleted file mode 100644 index c0f76cc196a6..000000000000 --- a/drivers/staging/unisys/Makefile +++ /dev/null @@ -1,7 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for Unisys SPAR drivers -# -obj-$(CONFIG_UNISYS_VISORNIC) += visornic/ -obj-$(CONFIG_UNISYS_VISORINPUT) += visorinput/ -obj-$(CONFIG_UNISYS_VISORHBA) += visorhba/ diff --git a/drivers/staging/unisys/TODO b/drivers/staging/unisys/TODO deleted file mode 100644 index d863f266bf76..000000000000 --- a/drivers/staging/unisys/TODO +++ /dev/null @@ -1,16 +0,0 @@ -TODO: - - enhance visornic to use channel_interrupt() hook instead of a - kernel thread - - enhance visorhba to use channel_interrupt() hook instead of a - kernel thread - - teach visorbus to handle virtual interrupts triggered by s-Par - back-end, and call function driver's channel_interrupt() function - when they occur - - enhance debugfs interfaces (e.g., per device, etc.) - - upgrade/remove deprecated workqueue operations - - move individual drivers into proper driver subsystems - -Patches to: - Greg Kroah-Hartman <gregkh@linuxfoundation.org> - Ken Cox <jkc@redhat.com> - Unisys s-Par maintainer mailing list <sparmaintainer@unisys.com> diff --git a/drivers/staging/unisys/include/iochannel.h b/drivers/staging/unisys/include/iochannel.h deleted file mode 100644 index 9ef812c0bc42..000000000000 --- a/drivers/staging/unisys/include/iochannel.h +++ /dev/null @@ -1,571 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ */ -/* - * Copyright (C) 2010 - 2016 UNISYS CORPORATION - * All rights reserved. - */ - -#ifndef __IOCHANNEL_H__ -#define __IOCHANNEL_H__ - -/* - * Everything needed for IOPart-GuestPart communication is define in - * this file. Note: Everything is OS-independent because this file is - * used by Windows, Linux and possible EFI drivers. - * - * Communication flow between the IOPart and GuestPart uses the channel headers - * channel state. The following states are currently being used: - * UNINIT(All Zeroes), CHANNEL_ATTACHING, CHANNEL_ATTACHED, CHANNEL_OPENED - * - * Additional states will be used later. No locking is needed to switch between - * states due to the following rules: - * - * 1. IOPart is only the only partition allowed to change from UNIT - * 2. IOPart is only the only partition allowed to change from - * CHANNEL_ATTACHING - * 3. GuestPart is only the only partition allowed to change from - * CHANNEL_ATTACHED - * - * The state changes are the following: IOPart sees the channel is in UNINIT, - * UNINIT -> CHANNEL_ATTACHING (performed only by IOPart) - * CHANNEL_ATTACHING -> CHANNEL_ATTACHED (performed only by IOPart) - * CHANNEL_ATTACHED -> CHANNEL_OPENED (performed only by GuestPart) - */ - -#include <linux/uuid.h> -#include <linux/skbuff.h> -#include <linux/visorbus.h> - -/* - * Must increment these whenever you insert or delete fields within this channel - * struct. Also increment whenever you change the meaning of fields within this - * channel struct so as to break pre-existing software. Note that you can - * usually add fields to the END of the channel struct without needing to - * increment this. - */ -#define VISOR_VHBA_CHANNEL_VERSIONID 2 -#define VISOR_VNIC_CHANNEL_VERSIONID 2 - -/* - * Everything necessary to handle SCSI & NIC traffic between Guest Partition and - * IO Partition is defined below. - */ - -/* - * Define the two queues per data channel between iopart and ioguestparts. - * IOCHAN_TO_IOPART -- used by guest to 'insert' signals to iopart. - * IOCHAN_FROM_IOPART -- used by guest to 'remove' signals from IO part. - */ -#define IOCHAN_TO_IOPART 0 -#define IOCHAN_FROM_IOPART 1 - -/* Size of cdb - i.e., SCSI cmnd */ -#define MAX_CMND_SIZE 16 - -/* Unisys-specific DMA direction values */ -enum uis_dma_data_direction { - UIS_DMA_BIDIRECTIONAL = 0, - UIS_DMA_TO_DEVICE = 1, - UIS_DMA_FROM_DEVICE = 2, - UIS_DMA_NONE = 3 -}; - -#define MAX_SENSE_SIZE 64 -#define MAX_PHYS_INFO 64 - -/* - * enum net_types - Various types of network packets that can be sent in cmdrsp. - * @NET_RCV_POST: Submit buffer to hold receiving incoming packet. - * @NET_RCV: visornic -> uisnic. Incoming packet received. - * @NET_XMIT: uisnic -> visornic. For outgoing packet. - * @NET_XMIT_DONE: visornic -> uisnic. Outgoing packet xmitted. - * @NET_RCV_ENBDIS: uisnic -> visornic. Enable/Disable packet reception. - * @NET_RCV_ENBDIS_ACK: visornic -> uisnic. Acknowledge enable/disable packet. - * @NET_RCV_PROMISC: uisnic -> visornic. Enable/Disable promiscuous mode. - * @NET_CONNECT_STATUS: visornic -> uisnic. Indicate the loss or restoration of - * a network connection. - * @NET_MACADDR: uisnic -> visornic. Indicates the client has requested - * to update it's MAC address. - * @NET_MACADDR_ACK: MAC address acknowledge. - */ -enum net_types { - NET_RCV_POST = 0, - NET_RCV, - NET_XMIT, - NET_XMIT_DONE, - NET_RCV_ENBDIS, - NET_RCV_ENBDIS_ACK, - /* Reception */ - NET_RCV_PROMISC, - NET_CONNECT_STATUS, - NET_MACADDR, - NET_MACADDR_ACK, -}; - -/* Minimum eth data size */ -#define ETH_MIN_DATA_SIZE 46 -#define ETH_MIN_PACKET_SIZE (ETH_HLEN + ETH_MIN_DATA_SIZE) - -/* Maximum data size */ -#define VISOR_ETH_MAX_MTU 16384 - -#ifndef MAX_MACADDR_LEN -/* Number of bytes in MAC address */ -#define MAX_MACADDR_LEN 6 -#endif - -/* Various types of scsi task mgmt commands. */ -enum task_mgmt_types { - TASK_MGMT_ABORT_TASK = 1, - TASK_MGMT_BUS_RESET, - TASK_MGMT_LUN_RESET, - TASK_MGMT_TARGET_RESET, -}; - -/* Various types of vdisk mgmt commands. */ -enum vdisk_mgmt_types { - VDISK_MGMT_ACQUIRE = 1, - VDISK_MGMT_RELEASE, -}; - -struct phys_info { - u64 pi_pfn; - u16 pi_off; - u16 pi_len; -} __packed; - -#define MIN_NUMSIGNALS 64 - -/* Structs with pragma pack. */ - -struct guest_phys_info { - u64 address; - u64 length; -} __packed; - -/* - * struct uisscsi_dest - * @channel: Bus number. - * @id: Target number. - * @lun: Logical unit number. - */ -struct uisscsi_dest { - u32 channel; - u32 id; - u32 lun; -} __packed; - -struct vhba_wwnn { - u32 wwnn1; - u32 wwnn2; -} __packed; - -/* - * struct vhba_config_max - * @max_channel: Maximum channel for devices attached to this bus. - * @max_id: Maximum SCSI ID for devices attached to bus. - * @max_lun: Maximum SCSI LUN for devices attached to bus. - * @cmd_per_lun: Maximum number of outstanding commands per LUN. - * @max_io_size: Maximum io size for devices attached to this bus. Max io size - * is often determined by the resource of the hba. - * e.g Max scatter gather list length * page size / sector size. - * - * WARNING: Values stored in this structure must contain maximum counts (not - * maximum values). - * - * 20 bytes - */ -struct vhba_config_max { - u32 max_channel; - u32 max_id; - u32 max_lun; - u32 cmd_per_lun; - u32 max_io_size; -} __packed; - -/* - * struct uiscmdrsp_scsi - * - * @handle: The handle to the cmd that was received. Send it back as - * is in the rsp packet. - * @cmnd: The cdb for the command. - * @bufflen: Length of data to be transferred out or in. - * @guest_phys_entries: Number of entries in scatter-gather list. - * @struct gpi_list: Physical address information for each fragment. - * @data_dir: Direction of the data, if any. - * @struct vdest: Identifies the virtual hba, id, channel, lun to which - * cmd was sent. - * @linuxstat: Original Linux status used by Linux vdisk. - * @scsistat: The scsi status. - * @addlstat: Non-scsi status. - * @sensebuf: Sense info in case cmd failed. sensebuf holds the - * sense_data struct. See sense_data struct for more - * details. - * @*vdisk: Pointer to the vdisk to clean up when IO completes. - * @no_disk_result: Used to return no disk inquiry result when - * no_disk_result is set to 1 - * scsi.scsistat is SAM_STAT_GOOD - * scsi.addlstat is 0 - * scsi.linuxstat is SAM_STAT_GOOD - * That is, there is NO error. - */ -struct uiscmdrsp_scsi { - u64 handle; - u8 cmnd[MAX_CMND_SIZE]; - u32 bufflen; - u16 guest_phys_entries; - struct guest_phys_info gpi_list[MAX_PHYS_INFO]; - u32 data_dir; - struct uisscsi_dest vdest; - /* Needed to queue the rsp back to cmd originator. */ - int linuxstat; - u8 scsistat; - u8 addlstat; -#define ADDL_SEL_TIMEOUT 4 - /* The following fields are need to determine the result of command. */ - u8 sensebuf[MAX_SENSE_SIZE]; - void *vdisk; - int no_disk_result; -} __packed; - -/* - * Defines to support sending correct inquiry result when no disk is - * configured. - * - * From SCSI SPC2 - - * - * If the target is not capable of supporting a device on this logical unit, the - * device server shall set this field to 7Fh (PERIPHERAL QUALIFIER set to 011b - * and PERIPHERAL DEVICE TYPE set to 1Fh). - * - * The device server is capable of supporting the specified peripheral device - * type on this logical unit. However, the physical device is not currently - * connected to this logical unit. - */ - -/* - * Peripheral qualifier of 0x3 - * Peripheral type of 0x1f - * Specifies no device but target present - */ -#define DEV_NOT_CAPABLE 0x7f -/* - * Peripheral qualifier of 0x1 - * Peripheral type of 0 - disk - * Specifies device capable, but not present - */ -#define DEV_DISK_CAPABLE_NOT_PRESENT 0x20 -/* HiSup = 1; shows support for report luns must be returned for lun 0. */ -#define DEV_HISUPPORT 0x10 - -/* - * Peripheral qualifier of 0x3 - * Peripheral type of 0x1f - * Specifies no device but target present - */ -#define DEV_NOT_CAPABLE 0x7f -/* - * Peripheral qualifier of 0x1 - * Peripheral type of 0 - disk - * Specifies device capable, but not present - */ -#define DEV_DISK_CAPABLE_NOT_PRESENT 0x20 -/* HiSup = 1; shows support for report luns must be returned for lun 0. */ -#define DEV_HISUPPORT 0x10 - -/* - * NOTE: Linux code assumes inquiry contains 36 bytes. Without checking length - * in buf[4] some Linux code accesses bytes beyond 5 to retrieve vendor, product - * and revision. Yikes! So let us always send back 36 bytes, the minimum for - * inquiry result. - */ -#define NO_DISK_INQUIRY_RESULT_LEN 36 -/* 5 bytes minimum for inquiry result */ -#define MIN_INQUIRY_RESULT_LEN 5 - -/* SCSI device version for no disk inquiry result */ -/* indicates SCSI SPC2 (SPC3 is 5) */ -#define SCSI_SPC2_VER 4 - -/* Struct and Defines to support sense information. */ - -/* - * The following struct is returned in sensebuf field in uiscmdrsp_scsi. It is - * initialized in exactly the manner that is recommended in Windows (hence the - * odd values). - * When set, these fields will have the following values: - * ErrorCode = 0x70 indicates current error - * Valid = 1 indicates sense info is valid - * SenseKey contains sense key as defined by SCSI specs. - * AdditionalSenseCode contains sense key as defined by SCSI specs. - * AdditionalSenseCodeQualifier contains qualifier to sense code as defined by - * scsi docs. - * AdditionalSenseLength contains will be sizeof(sense_data)-8=10. - */ -struct sense_data { - u8 errorcode:7; - u8 valid:1; - u8 segment_number; - u8 sense_key:4; - u8 reserved:1; - u8 incorrect_length:1; - u8 end_of_media:1; - u8 file_mark:1; - u8 information[4]; - u8 additional_sense_length; - u8 command_specific_information[4]; - u8 additional_sense_code; - u8 additional_sense_code_qualifier; - u8 fru_code; - u8 sense_key_specific[3]; -} __packed; - -/* - * struct net_pkt_xmt - * @len: Full length of data in the packet. - * @num_frags: Number of fragments in frags containing data. - * @struct phys_info frags: Physical page information. - * @ethhdr: The ethernet header. - * @struct lincsum: These are needed for csum at uisnic end. - * @valid: 1 = struct is valid - else ignore. - * @hrawoffv: 1 = hwrafoff is valid. - * @nhrawoffv: 1 = nhwrafoff is valid. - * @protocol: Specifies packet protocol. - * @csum: Value used to set skb->csum at IOPart. - * @hrawoff: Value used to set skb->h.raw at IOPart. hrawoff points to - * the start of the TRANSPORT LAYER HEADER. - * @nhrawoff: Value used to set skb->nh.raw at IOPart. nhrawoff points to - * the start of the NETWORK LAYER HEADER. - * - * NOTE: - * The full packet is described in frags but the ethernet header is separately - * kept in ethhdr so that uisnic doesn't have "MAP" the guest memory to get to - * the header. uisnic needs ethhdr to determine how to route the packet. - */ -struct net_pkt_xmt { - int len; - int num_frags; - struct phys_info frags[MAX_PHYS_INFO]; - char ethhdr[ETH_HLEN]; - struct { - u8 valid; - u8 hrawoffv; - u8 nhrawoffv; - __be16 protocol; - __wsum csum; - u32 hrawoff; - u32 nhrawoff; - } lincsum; -} __packed; - -struct net_pkt_xmtdone { - /* Result of NET_XMIT */ - u32 xmt_done_result; -} __packed; - -/* - * RCVPOST_BUF_SIZE must be at most page_size(4096) - cache_line_size (64) The - * reason is because dev_skb_alloc which is used to generate RCV_POST skbs in - * visornic requires that there is "overhead" in the buffer, and pads 16 bytes. - * Use 1 full cache line size for "overhead" so that transfers are optimized. - * IOVM requires that a buffer be represented by 1 phys_info structure - * which can only cover page_size. - */ -#define RCVPOST_BUF_SIZE 4032 -#define MAX_NET_RCV_CHAIN \ - ((VISOR_ETH_MAX_MTU + ETH_HLEN + RCVPOST_BUF_SIZE - 1) \ - / RCVPOST_BUF_SIZE) - -/* rcv buf size must be large enough to include ethernet data len + ethernet - * header len - we are choosing 2K because it is guaranteed to be describable. - */ -struct net_pkt_rcvpost { - /* Physical page information for the single fragment 2K rcv buf */ - struct phys_info frag; - /* - * Ensures that receive posts are returned to the adapter which we sent - * them from originally. - */ - u64 unique_num; - -} __packed; - -/* - * struct net_pkt_rcv - * @rcv_done_len: Length of the received data. - * @numrcvbufs: Contains the incoming data. Guest side MUST chain these - * together. - * @*rcvbuf: List of chained rcvbufa. Each entry is a receive buffer - * provided by NET_RCV_POST. NOTE: First rcvbuf in the - * chain will also be provided in net.buf. - * @unique_num: - * @rcvs_dropped_delta: - * - * The number of rcvbuf that can be chained is based on max mtu and size of each - * rcvbuf. - */ -struct net_pkt_rcv { - u32 rcv_done_len; - u8 numrcvbufs; - void *rcvbuf[MAX_NET_RCV_CHAIN]; - u64 unique_num; - u32 rcvs_dropped_delta; -} __packed; - -struct net_pkt_enbdis { - void *context; - /* 1 = enable, 0 = disable */ - u16 enable; -} __packed; - -struct net_pkt_macaddr { - void *context; - /* 6 bytes */ - u8 macaddr[MAX_MACADDR_LEN]; -} __packed; - -/* - * struct uiscmdrsp_net - cmd rsp packet used for VNIC network traffic. - * @enum type: - * @*buf: - * @union: - * @struct xmt: Used for NET_XMIT. - * @struct xmtdone: Used for NET_XMIT_DONE. - * @struct rcvpost: Used for NET_RCV_POST. - * @struct rcv: Used for NET_RCV. - * @struct enbdis: Used for NET_RCV_ENBDIS, NET_RCV_ENBDIS_ACK, - * NET_RCV_PROMSIC, and NET_CONNECT_STATUS. - * @struct macaddr: - */ -struct uiscmdrsp_net { - enum net_types type; - void *buf; - union { - struct net_pkt_xmt xmt; - struct net_pkt_xmtdone xmtdone; - struct net_pkt_rcvpost rcvpost; - struct net_pkt_rcv rcv; - struct net_pkt_enbdis enbdis; - struct net_pkt_macaddr macaddr; - }; -} __packed; - -/* - * struct uiscmdrsp_scsitaskmgmt - * @enum tasktype: The type of task. - * @struct vdest: The vdisk for which this task mgmt is generated. - * @handle: This is a handle that the guest has saved off for its - * own use. The handle value is preserved by iopart and - * returned as in task mgmt rsp. - * @notify_handle: For Linux guests, this is a pointer to wait_queue_head - * that a thread is waiting on to see if the taskmgmt - * command has completed. When the rsp is received by - * guest, the thread receiving the response uses this to - * notify the thread waiting for taskmgmt command - * completion. It's value is preserved by iopart and - * returned as in the task mgmt rsp. - * @notifyresult_handle: This is a handle to the location in the guest where - * the result of the taskmgmt command (result field) is - * saved to when the response is handled. It's value is - * preserved by iopart and returned as is in the task mgmt - * rsp. - * @result: Result of taskmgmt command - set by IOPart. - */ -struct uiscmdrsp_scsitaskmgmt { - enum task_mgmt_types tasktype; - struct uisscsi_dest vdest; - u64 handle; - u64 notify_handle; - u64 notifyresult_handle; - char result; - -#define TASK_MGMT_FAILED 0 -} __packed; - -/* - * struct uiscmdrsp_disknotify - Used by uissd to send disk add/remove - * notifications to Guest. - * @add: 0-remove, 1-add. - * @*v_hba: Channel info to route msg. - * @channel: SCSI Path of Disk to added or removed. - * @id: SCSI Path of Disk to added or removed. - * @lun: SCSI Path of Disk to added or removed. - * - * Note that the vHba pointer is not used by the Client/Guest side. - */ -struct uiscmdrsp_disknotify { - u8 add; - void *v_hba; - u32 channel, id, lun; -} __packed; - -/* Keeping cmd and rsp info in one structure for now cmd rsp packet for SCSI */ -struct uiscmdrsp { - char cmdtype; - /* Describes what type of information is in the struct */ -#define CMD_SCSI_TYPE 1 -#define CMD_NET_TYPE 2 -#define CMD_SCSITASKMGMT_TYPE 3 -#define CMD_NOTIFYGUEST_TYPE 4 - union { - struct uiscmdrsp_scsi scsi; - struct uiscmdrsp_net net; - struct uiscmdrsp_scsitaskmgmt scsitaskmgmt; - struct uiscmdrsp_disknotify disknotify; - }; - /* Send the response when the cmd is done (scsi and scsittaskmgmt). */ - void *private_data; - /* General Purpose Queue Link */ - struct uiscmdrsp *next; - /* Pointer to the nextactive commands */ - struct uiscmdrsp *activeQ_next; - /* Pointer to the prevactive commands */ - struct uiscmdrsp *activeQ_prev; -} __packed; - -/* total = 28 bytes */ -struct iochannel_vhba { - /* 8 bytes */ - struct vhba_wwnn wwnn; - /* 20 bytes */ - struct vhba_config_max max; -} __packed; - -struct iochannel_vnic { - /* 6 bytes */ - u8 macaddr[6]; - /* 4 bytes */ - u32 num_rcv_bufs; - /* 4 bytes */ - u32 mtu; - /* 16 bytes */ - guid_t zone_guid; -} __packed; - -/* - * This is just the header of the IO channel. It is assumed that directly after - * this header there is a large region of memory which contains the command and - * response queues as specified in cmd_q and rsp_q SIGNAL_QUEUE_HEADERS. - */ -struct visor_io_channel { - struct channel_header channel_header; - struct signal_queue_header cmd_q; - struct signal_queue_header rsp_q; - union { - struct iochannel_vhba vhba; - struct iochannel_vnic vnic; - } __packed; - -#define MAX_CLIENTSTRING_LEN 1024 - /* client_string is NULL termimated so holds max-1 bytes */ - u8 client_string[MAX_CLIENTSTRING_LEN]; -} __packed; - -/* INLINE functions for initializing and accessing I/O data channels. */ -#define SIZEOF_CMDRSP (64 * DIV_ROUND_UP(sizeof(struct uiscmdrsp), 64)) - -/* Use 4K page sizes when passing page info between Guest and IOPartition. */ -#define PI_PAGE_SIZE 0x1000 -#define PI_PAGE_MASK 0x0FFF - -/* __IOCHANNEL_H__ */ -#endif diff --git a/drivers/staging/unisys/visorhba/Kconfig b/drivers/staging/unisys/visorhba/Kconfig deleted file mode 100644 index ed59ac11c322..000000000000 --- a/drivers/staging/unisys/visorhba/Kconfig +++ /dev/null @@ -1,15 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Unisys visorhba configuration -# - -config UNISYS_VISORHBA - tristate "Unisys visorhba driver" - depends on UNISYSSPAR && UNISYS_VISORBUS && SCSI - help - The Unisys visorhba driver provides support for s-Par HBA - devices exposed on the s-Par visorbus. When a message is sent - to visorbus to create a HBA device, the probe function of - visorhba is called to create the scsi device. - If you say Y here, you will enable the Unisys visorhba driver. - diff --git a/drivers/staging/unisys/visorhba/Makefile b/drivers/staging/unisys/visorhba/Makefile deleted file mode 100644 index b613a7dcdae9..000000000000 --- a/drivers/staging/unisys/visorhba/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for Unisys channel -# - -obj-$(CONFIG_UNISYS_VISORHBA) += visorhba.o - -visorhba-y := visorhba_main.o - -ccflags-y += -I $(srctree)/$(src)/../include diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c b/drivers/staging/unisys/visorhba/visorhba_main.c deleted file mode 100644 index 694644112447..000000000000 --- a/drivers/staging/unisys/visorhba/visorhba_main.c +++ /dev/null @@ -1,1142 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (c) 2012 - 2015 UNISYS CORPORATION - * All rights reserved. - */ - -#include <linux/debugfs.h> -#include <linux/kthread.h> -#include <linux/module.h> -#include <linux/seq_file.h> -#include <linux/visorbus.h> -#include <linux/xarray.h> -#include <scsi/scsi.h> -#include <scsi/scsi_host.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_device.h> - -#include "iochannel.h" - -/* The Send and Receive Buffers of the IO Queue may both be full */ - -#define IOS_ERROR_THRESHOLD 1000 -#define MAX_PENDING_REQUESTS (MIN_NUMSIGNALS * 2) -#define VISORHBA_ERROR_COUNT 30 - -static struct dentry *visorhba_debugfs_dir; - -/* GUIDS for HBA channel type supported by this driver */ -static struct visor_channeltype_descriptor visorhba_channel_types[] = { - /* Note that the only channel type we expect to be reported by the - * bus driver is the VISOR_VHBA channel. - */ - { VISOR_VHBA_CHANNEL_GUID, "sparvhba", sizeof(struct channel_header), - VISOR_VHBA_CHANNEL_VERSIONID }, - {} -}; - -MODULE_DEVICE_TABLE(visorbus, visorhba_channel_types); -MODULE_ALIAS("visorbus:" VISOR_VHBA_CHANNEL_GUID_STR); - -struct visordisk_info { - struct scsi_device *sdev; - u32 valid; - atomic_t ios_threshold; - atomic_t error_count; - struct visordisk_info *next; -}; - -struct scsipending { - struct uiscmdrsp cmdrsp; - /* The Data being tracked */ - void *sent; - /* Type of pointer that is being stored */ - char cmdtype; -}; - -/* Each scsi_host has a host_data area that contains this struct. */ -struct visorhba_devdata { - struct Scsi_Host *scsihost; - struct visor_device *dev; - struct list_head dev_info_list; - /* Tracks the requests that have been forwarded to - * the IOVM and haven't returned yet - */ - struct scsipending pending[MAX_PENDING_REQUESTS]; - /* Start search for next pending free slot here */ - unsigned int nextinsert; - /* lock to protect data in devdata */ - spinlock_t privlock; - bool serverdown; - bool serverchangingstate; - unsigned long long acquire_failed_cnt; - unsigned long long interrupts_rcvd; - unsigned long long interrupts_notme; - unsigned long long interrupts_disabled; - u64 __iomem *flags_addr; - struct visordisk_info head; - unsigned int max_buff_len; - int devnum; - struct uiscmdrsp *cmdrsp; - /* - * allows us to pass int handles back-and-forth between us and - * iovm, instead of raw pointers - */ - struct xarray xa; - struct dentry *debugfs_dir; - struct dentry *debugfs_info; -}; - -struct visorhba_devices_open { - struct visorhba_devdata *devdata; -}; - -/* - * add_scsipending_entry - Save off io command that is pending in - * Service Partition - * @devdata: Pointer to devdata - * @cmdtype: Specifies the type of command pending - * @new: The command to be saved - * - * Saves off the io command that is being handled by the Service - * Partition so that it can be handled when it completes. If new is - * NULL it is assumed the entry refers only to the cmdrsp. - * - * Return: Insert_location where entry was added on success, - * -EBUSY if it can't - */ -static int add_scsipending_entry(struct visorhba_devdata *devdata, - char cmdtype, void *new) -{ - unsigned long flags; - struct scsipending *entry; - int insert_location; - - spin_lock_irqsave(&devdata->privlock, flags); - insert_location = devdata->nextinsert; - while (devdata->pending[insert_location].sent) { - insert_location = (insert_location + 1) % MAX_PENDING_REQUESTS; - if (insert_location == (int)devdata->nextinsert) { - spin_unlock_irqrestore(&devdata->privlock, flags); - return -EBUSY; - } - } - - entry = &devdata->pending[insert_location]; - memset(&entry->cmdrsp, 0, sizeof(entry->cmdrsp)); - entry->cmdtype = cmdtype; - if (new) - entry->sent = new; - /* wants to send cmdrsp */ - else - entry->sent = &entry->cmdrsp; - devdata->nextinsert = (insert_location + 1) % MAX_PENDING_REQUESTS; - spin_unlock_irqrestore(&devdata->privlock, flags); - - return insert_location; -} - -/* - * del_scsipending_ent - Removes an entry from the pending array - * @devdata: Device holding the pending array - * @del: Entry to remove - * - * Removes the entry pointed at by del and returns it. - * - * Return: The scsipending entry pointed to on success, NULL on failure - */ -static void *del_scsipending_ent(struct visorhba_devdata *devdata, int del) -{ - unsigned long flags; - void *sent; - - if (del >= MAX_PENDING_REQUESTS) - return NULL; - - spin_lock_irqsave(&devdata->privlock, flags); - sent = devdata->pending[del].sent; - devdata->pending[del].cmdtype = 0; - devdata->pending[del].sent = NULL; - spin_unlock_irqrestore(&devdata->privlock, flags); - - return sent; -} - -/* - * get_scsipending_cmdrsp - Return the cmdrsp stored in a pending entry - * @ddata: Device holding the pending array - * @ent: Entry that stores the cmdrsp - * - * Each scsipending entry has a cmdrsp in it. The cmdrsp is only valid - * if the "sent" field is not NULL. - * - * Return: A pointer to the cmdrsp, NULL on failure - */ -static struct uiscmdrsp *get_scsipending_cmdrsp(struct visorhba_devdata *ddata, - int ent) -{ - if (ddata->pending[ent].sent) - return &ddata->pending[ent].cmdrsp; - - return NULL; -} - -/* - * setup_scsitaskmgmt_handles - Stash the necessary handles so that the - * completion processing logic for a taskmgmt - * cmd will be able to find who to wake up - * and where to stash the result - * @xa: The data object maintaining the pointer<-->int mappings - * @cmdrsp: Response from the IOVM - * @event: The event handle to associate with an id - * @result: The location to place the result of the event handle into - */ -static int setup_scsitaskmgmt_handles(struct xarray *xa, struct uiscmdrsp *cmdrsp, - wait_queue_head_t *event, int *result) -{ - int ret; - u32 id; - - /* specify the event that has to be triggered when this cmd is complete */ - ret = xa_alloc_irq(xa, &id, event, xa_limit_32b, GFP_KERNEL); - if (ret) - return ret; - cmdrsp->scsitaskmgmt.notify_handle = id; - ret = xa_alloc_irq(xa, &id, result, xa_limit_32b, GFP_KERNEL); - if (ret) { - xa_erase_irq(xa, cmdrsp->scsitaskmgmt.notify_handle); - return ret; - } - cmdrsp->scsitaskmgmt.notifyresult_handle = id; - - return 0; -} - -/* - * cleanup_scsitaskmgmt_handles - Forget handles created by - * setup_scsitaskmgmt_handles() - * @xa: The data object maintaining the pointer<-->int mappings - * @cmdrsp: Response from the IOVM - */ -static void cleanup_scsitaskmgmt_handles(struct xarray *xa, - struct uiscmdrsp *cmdrsp) -{ - xa_erase_irq(xa, cmdrsp->scsitaskmgmt.notify_handle); - xa_erase_irq(xa, cmdrsp->scsitaskmgmt.notifyresult_handle); -} - -/* - * forward_taskmgmt_command - Send taskmegmt command to the Service - * Partition - * @tasktype: Type of taskmgmt command - * @scsidev: Scsidev that issued command - * - * Create a cmdrsp packet and send it to the Service Partition - * that will service this request. - * - * Return: Int representing whether command was queued successfully or not - */ -static int forward_taskmgmt_command(enum task_mgmt_types tasktype, - struct scsi_device *scsidev) -{ - struct uiscmdrsp *cmdrsp; - struct visorhba_devdata *devdata = - (struct visorhba_devdata *)scsidev->host->hostdata; - int notifyresult = 0xffff; - wait_queue_head_t notifyevent; - int scsicmd_id; - int ret; - - if (devdata->serverdown || devdata->serverchangingstate) - return FAILED; - - scsicmd_id = add_scsipending_entry(devdata, CMD_SCSITASKMGMT_TYPE, - NULL); - if (scsicmd_id < 0) - return FAILED; - - cmdrsp = get_scsipending_cmdrsp(devdata, scsicmd_id); - - init_waitqueue_head(¬ifyevent); - - /* issue TASK_MGMT_ABORT_TASK */ - cmdrsp->cmdtype = CMD_SCSITASKMGMT_TYPE; - - ret = setup_scsitaskmgmt_handles(&devdata->xa, cmdrsp, - ¬ifyevent, ¬ifyresult); - if (ret) { - dev_dbg(&scsidev->sdev_gendev, - "visorhba: setup_scsitaskmgmt_handles returned %d\n", ret); - return FAILED; - } - - /* save destination */ - cmdrsp->scsitaskmgmt.tasktype = tasktype; - cmdrsp->scsitaskmgmt.vdest.channel = scsidev->channel; - cmdrsp->scsitaskmgmt.vdest.id = scsidev->id; - cmdrsp->scsitaskmgmt.vdest.lun = scsidev->lun; - cmdrsp->scsitaskmgmt.handle = scsicmd_id; - - dev_dbg(&scsidev->sdev_gendev, - "visorhba: initiating type=%d taskmgmt command\n", tasktype); - if (visorchannel_signalinsert(devdata->dev->visorchannel, - IOCHAN_TO_IOPART, - cmdrsp)) - goto err_del_scsipending_ent; - - /* It can take the Service Partition up to 35 seconds to complete - * an IO in some cases, so wait 45 seconds and error out - */ - if (!wait_event_timeout(notifyevent, notifyresult != 0xffff, - msecs_to_jiffies(45000))) - goto err_del_scsipending_ent; - - dev_dbg(&scsidev->sdev_gendev, - "visorhba: taskmgmt type=%d success; result=0x%x\n", - tasktype, notifyresult); - cleanup_scsitaskmgmt_handles(&devdata->xa, cmdrsp); - return SUCCESS; - -err_del_scsipending_ent: - dev_dbg(&scsidev->sdev_gendev, - "visorhba: taskmgmt type=%d not executed\n", tasktype); - del_scsipending_ent(devdata, scsicmd_id); - cleanup_scsitaskmgmt_handles(&devdata->xa, cmdrsp); - return FAILED; -} - -/* - * visorhba_abort_handler - Send TASK_MGMT_ABORT_TASK - * @scsicmd: The scsicmd that needs aborted - * - * Return: SUCCESS if inserted, FAILED otherwise - */ -static int visorhba_abort_handler(struct scsi_cmnd *scsicmd) -{ - /* issue TASK_MGMT_ABORT_TASK */ - struct scsi_device *scsidev; - struct visordisk_info *vdisk; - int rtn; - - scsidev = scsicmd->device; - vdisk = scsidev->hostdata; - if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) - atomic_inc(&vdisk->error_count); - else - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); - rtn = forward_taskmgmt_command(TASK_MGMT_ABORT_TASK, scsidev); - if (rtn == SUCCESS) { - scsicmd->result = DID_ABORT << 16; - scsi_done(scsicmd); - } - return rtn; -} - -/* - * visorhba_device_reset_handler - Send TASK_MGMT_LUN_RESET - * @scsicmd: The scsicmd that needs aborted - * - * Return: SUCCESS if inserted, FAILED otherwise - */ -static int visorhba_device_reset_handler(struct scsi_cmnd *scsicmd) -{ - /* issue TASK_MGMT_LUN_RESET */ - struct scsi_device *scsidev; - struct visordisk_info *vdisk; - int rtn; - - scsidev = scsicmd->device; - vdisk = scsidev->hostdata; - if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) - atomic_inc(&vdisk->error_count); - else - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); - rtn = forward_taskmgmt_command(TASK_MGMT_LUN_RESET, scsidev); - if (rtn == SUCCESS) { - scsicmd->result = DID_RESET << 16; - scsi_done(scsicmd); - } - return rtn; -} - -/* - * visorhba_bus_reset_handler - Send TASK_MGMT_TARGET_RESET for each - * target on the bus - * @scsicmd: The scsicmd that needs aborted - * - * Return: SUCCESS if inserted, FAILED otherwise - */ -static int visorhba_bus_reset_handler(struct scsi_cmnd *scsicmd) -{ - struct scsi_device *scsidev; - struct visordisk_info *vdisk; - int rtn; - - scsidev = scsicmd->device; - shost_for_each_device(scsidev, scsidev->host) { - vdisk = scsidev->hostdata; - if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) - atomic_inc(&vdisk->error_count); - else - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); - } - rtn = forward_taskmgmt_command(TASK_MGMT_BUS_RESET, scsidev); - if (rtn == SUCCESS) { - scsicmd->result = DID_RESET << 16; - scsi_done(scsicmd); - } - return rtn; -} - -/* - * visorhba_host_reset_handler - Not supported - * @scsicmd: The scsicmd that needs to be aborted - * - * Return: Not supported, return SUCCESS - */ -static int visorhba_host_reset_handler(struct scsi_cmnd *scsicmd) -{ - /* issue TASK_MGMT_TARGET_RESET for each target on each bus for host */ - return SUCCESS; -} - -/* - * visorhba_get_info - Get information about SCSI device - * @shp: Scsi host that is requesting information - * - * Return: String with visorhba information - */ -static const char *visorhba_get_info(struct Scsi_Host *shp) -{ - /* Return version string */ - return "visorhba"; -} - -/* - * dma_data_dir_linux_to_spar - convert dma_data_direction value to - * Unisys-specific equivalent - * @d: dma direction value to convert - * - * Returns the Unisys-specific dma direction value corresponding to @d - */ -static u32 dma_data_dir_linux_to_spar(enum dma_data_direction d) -{ - switch (d) { - case DMA_BIDIRECTIONAL: - return UIS_DMA_BIDIRECTIONAL; - case DMA_TO_DEVICE: - return UIS_DMA_TO_DEVICE; - case DMA_FROM_DEVICE: - return UIS_DMA_FROM_DEVICE; - case DMA_NONE: - return UIS_DMA_NONE; - default: - return UIS_DMA_NONE; - } -} - -/* - * visorhba_queue_command_lck - Queues command to the Service Partition - * @scsicmd: Command to be queued - * @vsiorhba_cmnd_done: Done command to call when scsicmd is returned - * - * Queues to scsicmd to the ServicePartition after converting it to a - * uiscmdrsp structure. - * - * Return: 0 if successfully queued to the Service Partition, otherwise - * error code - */ -static int visorhba_queue_command_lck(struct scsi_cmnd *scsicmd) -{ - void (*visorhba_cmnd_done)(struct scsi_cmnd *) = scsi_done; - struct uiscmdrsp *cmdrsp; - struct scsi_device *scsidev = scsicmd->device; - int insert_location; - unsigned char *cdb = scsicmd->cmnd; - struct Scsi_Host *scsihost = scsidev->host; - unsigned int i; - struct visorhba_devdata *devdata = - (struct visorhba_devdata *)scsihost->hostdata; - struct scatterlist *sg = NULL; - struct scatterlist *sglist = NULL; - - if (devdata->serverdown || devdata->serverchangingstate) - return SCSI_MLQUEUE_DEVICE_BUSY; - - insert_location = add_scsipending_entry(devdata, CMD_SCSI_TYPE, - (void *)scsicmd); - if (insert_location < 0) - return SCSI_MLQUEUE_DEVICE_BUSY; - - cmdrsp = get_scsipending_cmdrsp(devdata, insert_location); - cmdrsp->cmdtype = CMD_SCSI_TYPE; - /* save the pending insertion location. Deletion from pending - * will return the scsicmd pointer for completion - */ - cmdrsp->scsi.handle = insert_location; - - WARN_ON_ONCE(visorhba_cmnd_done != scsi_done); - /* save destination */ - cmdrsp->scsi.vdest.channel = scsidev->channel; - cmdrsp->scsi.vdest.id = scsidev->id; - cmdrsp->scsi.vdest.lun = scsidev->lun; - /* save datadir */ - cmdrsp->scsi.data_dir = - dma_data_dir_linux_to_spar(scsicmd->sc_data_direction); - memcpy(cmdrsp->scsi.cmnd, cdb, MAX_CMND_SIZE); - cmdrsp->scsi.bufflen = scsi_bufflen(scsicmd); - - /* keep track of the max buffer length so far. */ - if (cmdrsp->scsi.bufflen > devdata->max_buff_len) - devdata->max_buff_len = cmdrsp->scsi.bufflen; - - if (scsi_sg_count(scsicmd) > MAX_PHYS_INFO) - goto err_del_scsipending_ent; - - /* convert buffer to phys information */ - /* buffer is scatterlist - copy it out */ - sglist = scsi_sglist(scsicmd); - - for_each_sg(sglist, sg, scsi_sg_count(scsicmd), i) { - cmdrsp->scsi.gpi_list[i].address = sg_phys(sg); - cmdrsp->scsi.gpi_list[i].length = sg->length; - } - cmdrsp->scsi.guest_phys_entries = scsi_sg_count(scsicmd); - - if (visorchannel_signalinsert(devdata->dev->visorchannel, - IOCHAN_TO_IOPART, - cmdrsp)) - /* queue must be full and we aren't going to wait */ - goto err_del_scsipending_ent; - - return 0; - -err_del_scsipending_ent: - del_scsipending_ent(devdata, insert_location); - return SCSI_MLQUEUE_DEVICE_BUSY; -} - -#ifdef DEF_SCSI_QCMD -static DEF_SCSI_QCMD(visorhba_queue_command) -#else -#define visorhba_queue_command visorhba_queue_command_lck -#endif - -/* - * visorhba_slave_alloc - Called when new disk is discovered - * @scsidev: New disk - * - * Create a new visordisk_info structure and add it to our - * list of vdisks. - * - * Return: 0 on success, -ENOMEM on failure. - */ -static int visorhba_slave_alloc(struct scsi_device *scsidev) -{ - /* this is called by the midlayer before scan for new devices -- - * LLD can alloc any struct & do init if needed. - */ - struct visordisk_info *vdisk; - struct visorhba_devdata *devdata; - struct Scsi_Host *scsihost = (struct Scsi_Host *)scsidev->host; - - /* already allocated return success */ - if (scsidev->hostdata) - return 0; - - /* even though we errored, treat as success */ - devdata = (struct visorhba_devdata *)scsihost->hostdata; - if (!devdata) - return 0; - - vdisk = kzalloc(sizeof(*vdisk), GFP_ATOMIC); - if (!vdisk) - return -ENOMEM; - - vdisk->sdev = scsidev; - scsidev->hostdata = vdisk; - return 0; -} - -/* - * visorhba_slave_destroy - Disk is going away, clean up resources. - * @scsidev: Scsi device to destroy - */ -static void visorhba_slave_destroy(struct scsi_device *scsidev) -{ - /* midlevel calls this after device has been quiesced and - * before it is to be deleted. - */ - struct visordisk_info *vdisk; - - vdisk = scsidev->hostdata; - scsidev->hostdata = NULL; - kfree(vdisk); -} - -static struct scsi_host_template visorhba_driver_template = { - .name = "Unisys Visor HBA", - .info = visorhba_get_info, - .queuecommand = visorhba_queue_command, - .eh_abort_handler = visorhba_abort_handler, - .eh_device_reset_handler = visorhba_device_reset_handler, - .eh_bus_reset_handler = visorhba_bus_reset_handler, - .eh_host_reset_handler = visorhba_host_reset_handler, -#define visorhba_MAX_CMNDS 128 - .can_queue = visorhba_MAX_CMNDS, - .sg_tablesize = 64, - .this_id = -1, - .slave_alloc = visorhba_slave_alloc, - .slave_destroy = visorhba_slave_destroy, -}; - -/* - * info_debugfs_show - Debugfs interface to dump visorhba states - * @seq: The sequence file to write information to - * @v: Unused, but needed for use with seq file single_open invocation - * - * Presents a file in the debugfs tree named: /visorhba/vbus<x>:dev<y>/info. - * - * Return: SUCCESS - */ -static int info_debugfs_show(struct seq_file *seq, void *v) -{ - struct visorhba_devdata *devdata = seq->private; - - seq_printf(seq, "max_buff_len = %u\n", devdata->max_buff_len); - seq_printf(seq, "interrupts_rcvd = %llu\n", devdata->interrupts_rcvd); - seq_printf(seq, "interrupts_disabled = %llu\n", - devdata->interrupts_disabled); - seq_printf(seq, "interrupts_notme = %llu\n", - devdata->interrupts_notme); - seq_printf(seq, "flags_addr = %p\n", devdata->flags_addr); - if (devdata->flags_addr) { - u64 phys_flags_addr = - virt_to_phys((__force void *)devdata->flags_addr); - seq_printf(seq, "phys_flags_addr = 0x%016llx\n", - phys_flags_addr); - seq_printf(seq, "FeatureFlags = %llu\n", - (u64)readq(devdata->flags_addr)); - } - seq_printf(seq, "acquire_failed_cnt = %llu\n", - devdata->acquire_failed_cnt); - - return 0; -} -DEFINE_SHOW_ATTRIBUTE(info_debugfs); - -/* - * complete_taskmgmt_command - Complete task management - * @idrtable: The data object maintaining the pointer<-->int mappings - * @cmdrsp: Response from the IOVM - * @result: The result of the task management command - * - * Service Partition returned the result of the task management - * command. Wake up anyone waiting for it. - */ -static void complete_taskmgmt_command(struct xarray *xa, - struct uiscmdrsp *cmdrsp, int result) -{ - wait_queue_head_t *wq = - xa_load(xa, cmdrsp->scsitaskmgmt.notify_handle); - int *scsi_result_ptr = - xa_load(xa, cmdrsp->scsitaskmgmt.notifyresult_handle); - if (unlikely(!(wq && scsi_result_ptr))) { - pr_err("visorhba: no completion context; cmd will time out\n"); - return; - } - - /* copy the result of the taskmgmt and - * wake up the error handler that is waiting for this - */ - pr_debug("visorhba: notifying initiator with result=0x%x\n", result); - *scsi_result_ptr = result; - wake_up_all(wq); -} - -/* - * visorhba_serverdown_complete - Called when we are done cleaning up - * from serverdown - * @devdata: Visorhba instance on which to complete serverdown - * - * Called when we are done cleanning up from serverdown, stop processing - * queue, fail pending IOs. - */ -static void visorhba_serverdown_complete(struct visorhba_devdata *devdata) -{ - int i; - struct scsipending *pendingdel = NULL; - struct scsi_cmnd *scsicmd = NULL; - struct uiscmdrsp *cmdrsp; - unsigned long flags; - - /* Stop using the IOVM response queue (queue should be drained - * by the end) - */ - visorbus_disable_channel_interrupts(devdata->dev); - - /* Fail commands that weren't completed */ - spin_lock_irqsave(&devdata->privlock, flags); - for (i = 0; i < MAX_PENDING_REQUESTS; i++) { - pendingdel = &devdata->pending[i]; - switch (pendingdel->cmdtype) { - case CMD_SCSI_TYPE: - scsicmd = pendingdel->sent; - scsicmd->result = DID_RESET << 16; - scsi_done(scsicmd); - break; - case CMD_SCSITASKMGMT_TYPE: - cmdrsp = pendingdel->sent; - complete_taskmgmt_command(&devdata->xa, cmdrsp, - TASK_MGMT_FAILED); - break; - default: - break; - } - pendingdel->cmdtype = 0; - pendingdel->sent = NULL; - } - spin_unlock_irqrestore(&devdata->privlock, flags); - - devdata->serverdown = true; - devdata->serverchangingstate = false; -} - -/* - * visorhba_serverdown - Got notified that the IOVM is down - * @devdata: Visorhba that is being serviced by downed IOVM - * - * Something happened to the IOVM, return immediately and - * schedule cleanup work. - * - * Return: 0 on success, -EINVAL on failure - */ -static int visorhba_serverdown(struct visorhba_devdata *devdata) -{ - if (!devdata->serverdown && !devdata->serverchangingstate) { - devdata->serverchangingstate = true; - visorhba_serverdown_complete(devdata); - } else if (devdata->serverchangingstate) { - return -EINVAL; - } - return 0; -} - -/* - * do_scsi_linuxstat - Scsi command returned linuxstat - * @cmdrsp: Response from IOVM - * @scsicmd: Command issued - * - * Don't log errors for disk-not-present inquiries. - */ -static void do_scsi_linuxstat(struct uiscmdrsp *cmdrsp, - struct scsi_cmnd *scsicmd) -{ - struct visordisk_info *vdisk; - struct scsi_device *scsidev; - - scsidev = scsicmd->device; - memcpy(scsicmd->sense_buffer, cmdrsp->scsi.sensebuf, MAX_SENSE_SIZE); - - /* Do not log errors for disk-not-present inquiries */ - if (cmdrsp->scsi.cmnd[0] == INQUIRY && - (host_byte(cmdrsp->scsi.linuxstat) == DID_NO_CONNECT) && - cmdrsp->scsi.addlstat == ADDL_SEL_TIMEOUT) - return; - /* Okay see what our error_count is here.... */ - vdisk = scsidev->hostdata; - if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) { - atomic_inc(&vdisk->error_count); - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); - } -} - -static int set_no_disk_inquiry_result(unsigned char *buf, size_t len, - bool is_lun0) -{ - if (len < NO_DISK_INQUIRY_RESULT_LEN) - return -EINVAL; - memset(buf, 0, NO_DISK_INQUIRY_RESULT_LEN); - buf[2] = SCSI_SPC2_VER; - if (is_lun0) { - buf[0] = DEV_DISK_CAPABLE_NOT_PRESENT; - buf[3] = DEV_HISUPPORT; - } else { - buf[0] = DEV_NOT_CAPABLE; - } - buf[4] = NO_DISK_INQUIRY_RESULT_LEN - 5; - strncpy(buf + 8, "DELLPSEUDO DEVICE .", NO_DISK_INQUIRY_RESULT_LEN - 8); - return 0; -} - -/* - * do_scsi_nolinuxstat - Scsi command didn't have linuxstat - * @cmdrsp: Response from IOVM - * @scsicmd: Command issued - * - * Handle response when no linuxstat was returned. - */ -static void do_scsi_nolinuxstat(struct uiscmdrsp *cmdrsp, - struct scsi_cmnd *scsicmd) -{ - struct scsi_device *scsidev; - unsigned char *buf; - struct scatterlist *sg; - unsigned int i; - char *this_page; - char *this_page_orig; - int bufind = 0; - struct visordisk_info *vdisk; - - scsidev = scsicmd->device; - if (cmdrsp->scsi.cmnd[0] == INQUIRY && - cmdrsp->scsi.bufflen >= MIN_INQUIRY_RESULT_LEN) { - if (cmdrsp->scsi.no_disk_result == 0) - return; - - buf = kzalloc(36, GFP_KERNEL); - if (!buf) - return; - - /* Linux scsi code wants a device at Lun 0 - * to issue report luns, but we don't want - * a disk there so we'll present a processor - * there. - */ - set_no_disk_inquiry_result(buf, (size_t)cmdrsp->scsi.bufflen, - scsidev->lun == 0); - - if (scsi_sg_count(scsicmd) == 0) { - memcpy(scsi_sglist(scsicmd), buf, - cmdrsp->scsi.bufflen); - kfree(buf); - return; - } - - scsi_for_each_sg(scsicmd, sg, scsi_sg_count(scsicmd), i) { - this_page_orig = kmap_atomic(sg_page(sg)); - this_page = (void *)((unsigned long)this_page_orig | - sg->offset); - memcpy(this_page, buf + bufind, sg->length); - kunmap_atomic(this_page_orig); - } - kfree(buf); - } else { - vdisk = scsidev->hostdata; - if (atomic_read(&vdisk->ios_threshold) > 0) { - atomic_dec(&vdisk->ios_threshold); - if (atomic_read(&vdisk->ios_threshold) == 0) - atomic_set(&vdisk->error_count, 0); - } - } -} - -/* - * complete_scsi_command - Complete a scsi command - * @uiscmdrsp: Response from Service Partition - * @scsicmd: The scsi command - * - * Response was returned by the Service Partition. Finish it and send - * completion to the scsi midlayer. - */ -static void complete_scsi_command(struct uiscmdrsp *cmdrsp, - struct scsi_cmnd *scsicmd) -{ - /* take what we need out of cmdrsp and complete the scsicmd */ - scsicmd->result = cmdrsp->scsi.linuxstat; - if (cmdrsp->scsi.linuxstat) - do_scsi_linuxstat(cmdrsp, scsicmd); - else - do_scsi_nolinuxstat(cmdrsp, scsicmd); - - scsi_done(scsicmd); -} - -/* - * drain_queue - Pull responses out of iochannel - * @cmdrsp: Response from the IOSP - * @devdata: Device that owns this iochannel - * - * Pulls responses out of the iochannel and process the responses. - */ -static void drain_queue(struct uiscmdrsp *cmdrsp, - struct visorhba_devdata *devdata) -{ - struct scsi_cmnd *scsicmd; - - while (1) { - /* queue empty */ - if (visorchannel_signalremove(devdata->dev->visorchannel, - IOCHAN_FROM_IOPART, - cmdrsp)) - break; - if (cmdrsp->cmdtype == CMD_SCSI_TYPE) { - /* scsicmd location is returned by the - * deletion - */ - scsicmd = del_scsipending_ent(devdata, - cmdrsp->scsi.handle); - if (!scsicmd) - break; - /* complete the orig cmd */ - complete_scsi_command(cmdrsp, scsicmd); - } else if (cmdrsp->cmdtype == CMD_SCSITASKMGMT_TYPE) { - if (!del_scsipending_ent(devdata, - cmdrsp->scsitaskmgmt.handle)) - break; - complete_taskmgmt_command(&devdata->xa, cmdrsp, - cmdrsp->scsitaskmgmt.result); - } else if (cmdrsp->cmdtype == CMD_NOTIFYGUEST_TYPE) - dev_err_once(&devdata->dev->device, - "ignoring unsupported NOTIFYGUEST\n"); - /* cmdrsp is now available for re-use */ - } -} - -/* - * This is used only when this driver is active as an hba driver in the - * client guest partition. It is called periodically so we can obtain - * and process the command respond from the IO Service Partition periodically. - */ -static void visorhba_channel_interrupt(struct visor_device *dev) -{ - struct visorhba_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) - return; - - drain_queue(devdata->cmdrsp, devdata); -} - -/* - * visorhba_pause - Function to handle visorbus pause messages - * @dev: Device that is pausing - * @complete_func: Function to call when finished - * - * Something has happened to the IO Service Partition that is - * handling this device. Quiet this device and reset commands - * so that the Service Partition can be corrected. - * - * Return: SUCCESS - */ -static int visorhba_pause(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - struct visorhba_devdata *devdata = dev_get_drvdata(&dev->device); - - visorhba_serverdown(devdata); - complete_func(dev, 0); - return 0; -} - -/* - * visorhba_resume - Function called when the IO Service Partition is back - * @dev: Device that is pausing - * @complete_func: Function to call when finished - * - * Yay! The IO Service Partition is back, the channel has been wiped - * so lets re-establish connection and start processing responses. - * - * Return: 0 on success, -EINVAL on failure - */ -static int visorhba_resume(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - struct visorhba_devdata *devdata; - - devdata = dev_get_drvdata(&dev->device); - if (!devdata) - return -EINVAL; - - if (devdata->serverdown && !devdata->serverchangingstate) - devdata->serverchangingstate = true; - - visorbus_enable_channel_interrupts(dev); - devdata->serverdown = false; - devdata->serverchangingstate = false; - - return 0; -} - -/* - * visorhba_probe - Device has been discovered; do acquire - * @dev: visor_device that was discovered - * - * A new HBA was discovered; do the initial connections of it. - * - * Return: 0 on success, otherwise error code - */ -static int visorhba_probe(struct visor_device *dev) -{ - struct Scsi_Host *scsihost; - struct vhba_config_max max; - struct visorhba_devdata *devdata = NULL; - int err, channel_offset; - u64 features; - - scsihost = scsi_host_alloc(&visorhba_driver_template, - sizeof(*devdata)); - if (!scsihost) - return -ENODEV; - - channel_offset = offsetof(struct visor_io_channel, vhba.max); - err = visorbus_read_channel(dev, channel_offset, &max, - sizeof(struct vhba_config_max)); - if (err < 0) - goto err_scsi_host_put; - - scsihost->max_id = (unsigned int)max.max_id; - scsihost->max_lun = (unsigned int)max.max_lun; - scsihost->cmd_per_lun = (unsigned int)max.cmd_per_lun; - scsihost->max_sectors = - (unsigned short)(max.max_io_size >> 9); - scsihost->sg_tablesize = - (unsigned short)(max.max_io_size / PAGE_SIZE); - if (scsihost->sg_tablesize > MAX_PHYS_INFO) - scsihost->sg_tablesize = MAX_PHYS_INFO; - err = scsi_add_host(scsihost, &dev->device); - if (err < 0) - goto err_scsi_host_put; - - devdata = (struct visorhba_devdata *)scsihost->hostdata; - devdata->dev = dev; - dev_set_drvdata(&dev->device, devdata); - - devdata->debugfs_dir = debugfs_create_dir(dev_name(&dev->device), - visorhba_debugfs_dir); - if (!devdata->debugfs_dir) { - err = -ENOMEM; - goto err_scsi_remove_host; - } - devdata->debugfs_info = - debugfs_create_file("info", 0440, - devdata->debugfs_dir, devdata, - &info_debugfs_fops); - if (!devdata->debugfs_info) { - err = -ENOMEM; - goto err_debugfs_dir; - } - - spin_lock_init(&devdata->privlock); - devdata->serverdown = false; - devdata->serverchangingstate = false; - devdata->scsihost = scsihost; - - channel_offset = offsetof(struct visor_io_channel, - channel_header.features); - err = visorbus_read_channel(dev, channel_offset, &features, 8); - if (err) - goto err_debugfs_info; - features |= VISOR_CHANNEL_IS_POLLING; - err = visorbus_write_channel(dev, channel_offset, &features, 8); - if (err) - goto err_debugfs_info; - - xa_init(&devdata->xa); - - devdata->cmdrsp = kmalloc(sizeof(*devdata->cmdrsp), GFP_ATOMIC); - visorbus_enable_channel_interrupts(dev); - - scsi_scan_host(scsihost); - - return 0; - -err_debugfs_info: - debugfs_remove(devdata->debugfs_info); - -err_debugfs_dir: - debugfs_remove_recursive(devdata->debugfs_dir); - -err_scsi_remove_host: - scsi_remove_host(scsihost); - -err_scsi_host_put: - scsi_host_put(scsihost); - return err; -} - -/* - * visorhba_remove - Remove a visorhba device - * @dev: Device to remove - * - * Removes the visorhba device. - */ -static void visorhba_remove(struct visor_device *dev) -{ - struct visorhba_devdata *devdata = dev_get_drvdata(&dev->device); - struct Scsi_Host *scsihost = NULL; - - if (!devdata) - return; - - scsihost = devdata->scsihost; - kfree(devdata->cmdrsp); - visorbus_disable_channel_interrupts(dev); - scsi_remove_host(scsihost); - scsi_host_put(scsihost); - - dev_set_drvdata(&dev->device, NULL); - debugfs_remove(devdata->debugfs_info); - debugfs_remove_recursive(devdata->debugfs_dir); -} - -/* This is used to tell the visorbus driver which types of visor devices - * we support, and what functions to call when a visor device that we support - * is attached or removed. - */ -static struct visor_driver visorhba_driver = { - .name = "visorhba", - .owner = THIS_MODULE, - .channel_types = visorhba_channel_types, - .probe = visorhba_probe, - .remove = visorhba_remove, - .pause = visorhba_pause, - .resume = visorhba_resume, - .channel_interrupt = visorhba_channel_interrupt, -}; - -/* - * visorhba_init - Driver init routine - * - * Initialize the visorhba driver and register it with visorbus - * to handle s-Par virtual host bus adapter. - * - * Return: 0 on success, error code otherwise - */ -static int visorhba_init(void) -{ - int rc; - - visorhba_debugfs_dir = debugfs_create_dir("visorhba", NULL); - if (!visorhba_debugfs_dir) - return -ENOMEM; - - rc = visorbus_register_visor_driver(&visorhba_driver); - if (rc) - goto cleanup_debugfs; - - return 0; - -cleanup_debugfs: - debugfs_remove_recursive(visorhba_debugfs_dir); - - return rc; -} - -/* - * visorhba_exit - Driver exit routine - * - * Unregister driver from the bus and free up memory. - */ -static void visorhba_exit(void) -{ - visorbus_unregister_visor_driver(&visorhba_driver); - debugfs_remove_recursive(visorhba_debugfs_dir); -} - -module_init(visorhba_init); -module_exit(visorhba_exit); - -MODULE_AUTHOR("Unisys"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("s-Par HBA driver for virtual SCSI host busses"); diff --git a/drivers/staging/unisys/visorinput/Kconfig b/drivers/staging/unisys/visorinput/Kconfig deleted file mode 100644 index 5f036393aee9..000000000000 --- a/drivers/staging/unisys/visorinput/Kconfig +++ /dev/null @@ -1,16 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Unisys visorinput configuration -# - -config UNISYS_VISORINPUT - tristate "Unisys visorinput driver" - depends on UNISYSSPAR && UNISYS_VISORBUS && INPUT - help - The Unisys s-Par visorinput driver provides a virtualized system - console (keyboard and mouse) that is accessible through the - s-Par firmware's user interface. s-Par provides video using the EFI - GOP protocol, so If this driver is not present, the Linux guest should - still boot with visible output in the partition desktop, but keyboard - and mouse interaction will not be available. - diff --git a/drivers/staging/unisys/visorinput/Makefile b/drivers/staging/unisys/visorinput/Makefile deleted file mode 100644 index 68ced7c8a65f..000000000000 --- a/drivers/staging/unisys/visorinput/Makefile +++ /dev/null @@ -1,7 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for Unisys visorinput -# - -obj-$(CONFIG_UNISYS_VISORINPUT) += visorinput.o - diff --git a/drivers/staging/unisys/visorinput/visorinput.c b/drivers/staging/unisys/visorinput/visorinput.c deleted file mode 100644 index 426deab22d62..000000000000 --- a/drivers/staging/unisys/visorinput/visorinput.c +++ /dev/null @@ -1,787 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2011 - 2015 UNISYS CORPORATION - * All rights reserved. - */ - -/* - * This driver lives in a generic guest Linux partition, and registers to - * receive keyboard and mouse channels from the visorbus driver. It reads - * inputs from such channels, and delivers it to the Linux OS in the - * standard way the Linux expects for input drivers. - */ - -#include <linux/fb.h> -#include <linux/input.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/uuid.h> -#include <linux/visorbus.h> - -/* These defines identify mouse and keyboard activity which is specified by the - * firmware to the host using the cmsimpleinput protocol. @ingroup coretypes - */ -/* only motion; arg1=x, arg2=y */ -#define INPUTACTION_XY_MOTION 1 - -/* arg1: 1=left,2=center,3=right */ -#define INPUTACTION_MOUSE_BUTTON_DOWN 2 -#define INPUTACTION_MOUSE_BUTTON_UP 3 -#define INPUTACTION_MOUSE_BUTTON_CLICK 4 -#define INPUTACTION_MOUSE_BUTTON_DCLICK 5 - -/* arg1: wheel rotation away from/toward user */ -#define INPUTACTION_WHEEL_ROTATE_AWAY 6 -#define INPUTACTION_WHEEL_ROTATE_TOWARD 7 - -/* arg1: scancode, as follows: If arg1 <= 0xff, it's a 1-byte scancode and arg1 - * is that scancode. If arg1 > 0xff, it's a 2-byte scanecode, with the 1st - * byte in the low 8 bits, and the 2nd byte in the high 8 bits. - * E.g., the right ALT key would appear as x'38e0'. - */ -#define INPUTACTION_KEY_DOWN 64 -#define INPUTACTION_KEY_UP 65 -#define INPUTACTION_KEY_DOWN_UP 67 - -/* arg1: scancode (in same format as inputaction_keyDown); MUST refer to one of - * the locking keys, like capslock, numlock, or scrolllock. - * arg2: 1 iff locking key should be in the LOCKED position (e.g., light is ON) - */ -#define INPUTACTION_SET_LOCKING_KEY_STATE 66 - -/* Keyboard channel {c73416d0-b0b8-44af-b304-9d2ae99f1b3d} */ -#define VISOR_KEYBOARD_CHANNEL_GUID \ - GUID_INIT(0xc73416d0, 0xb0b8, 0x44af, \ - 0xb3, 0x4, 0x9d, 0x2a, 0xe9, 0x9f, 0x1b, 0x3d) -#define VISOR_KEYBOARD_CHANNEL_GUID_STR "c73416d0-b0b8-44af-b304-9d2ae99f1b3d" - -/* Mouse channel {addf07d4-94a9-46e2-81c3-61abcdbdbd87} */ -#define VISOR_MOUSE_CHANNEL_GUID \ - GUID_INIT(0xaddf07d4, 0x94a9, 0x46e2, \ - 0x81, 0xc3, 0x61, 0xab, 0xcd, 0xbd, 0xbd, 0x87) -#define VISOR_MOUSE_CHANNEL_GUID_STR "addf07d4-94a9-46e2-81c3-61abcdbdbd87" - -#define PIXELS_ACROSS_DEFAULT 1024 -#define PIXELS_DOWN_DEFAULT 768 -#define KEYCODE_TABLE_BYTES 256 - -struct visor_inputactivity { - u16 action; - u16 arg1; - u16 arg2; - u16 arg3; -} __packed; - -struct visor_inputreport { - u64 seq_no; - struct visor_inputactivity activity; -} __packed; - -/* header of keyboard/mouse channels */ -struct visor_input_channel_data { - u32 n_input_reports; - union { - struct { - u16 x_res; - u16 y_res; - } mouse; - struct { - u32 flags; - } keyboard; - }; -} __packed; - -enum visorinput_dev_type { - visorinput_keyboard, - visorinput_mouse, -}; - -/* - * This is the private data that we store for each device. A pointer to this - * struct is maintained via dev_get_drvdata() / dev_set_drvdata() for each - * struct device. - */ -struct visorinput_devdata { - struct visor_device *dev; - /* lock for dev */ - struct mutex lock_visor_dev; - struct input_dev *visorinput_dev; - bool paused; - bool interrupts_enabled; - /* size of following array */ - unsigned int keycode_table_bytes; - /* for keyboard devices: visorkbd_keycode[] + visorkbd_ext_keycode[] */ - unsigned char keycode_table[]; -}; - -static const guid_t visor_keyboard_channel_guid = VISOR_KEYBOARD_CHANNEL_GUID; -static const guid_t visor_mouse_channel_guid = VISOR_MOUSE_CHANNEL_GUID; - -/* - * Borrowed from drivers/input/keyboard/atakbd.c - * This maps 1-byte scancodes to keycodes. - */ -static const unsigned char visorkbd_keycode[KEYCODE_TABLE_BYTES] = { - /* American layout */ - [0] = KEY_GRAVE, - [1] = KEY_ESC, - [2] = KEY_1, - [3] = KEY_2, - [4] = KEY_3, - [5] = KEY_4, - [6] = KEY_5, - [7] = KEY_6, - [8] = KEY_7, - [9] = KEY_8, - [10] = KEY_9, - [11] = KEY_0, - [12] = KEY_MINUS, - [13] = KEY_EQUAL, - [14] = KEY_BACKSPACE, - [15] = KEY_TAB, - [16] = KEY_Q, - [17] = KEY_W, - [18] = KEY_E, - [19] = KEY_R, - [20] = KEY_T, - [21] = KEY_Y, - [22] = KEY_U, - [23] = KEY_I, - [24] = KEY_O, - [25] = KEY_P, - [26] = KEY_LEFTBRACE, - [27] = KEY_RIGHTBRACE, - [28] = KEY_ENTER, - [29] = KEY_LEFTCTRL, - [30] = KEY_A, - [31] = KEY_S, - [32] = KEY_D, - [33] = KEY_F, - [34] = KEY_G, - [35] = KEY_H, - [36] = KEY_J, - [37] = KEY_K, - [38] = KEY_L, - [39] = KEY_SEMICOLON, - [40] = KEY_APOSTROPHE, - [41] = KEY_GRAVE, - [42] = KEY_LEFTSHIFT, - [43] = KEY_BACKSLASH, - [44] = KEY_Z, - [45] = KEY_X, - [46] = KEY_C, - [47] = KEY_V, - [48] = KEY_B, - [49] = KEY_N, - [50] = KEY_M, - [51] = KEY_COMMA, - [52] = KEY_DOT, - [53] = KEY_SLASH, - [54] = KEY_RIGHTSHIFT, - [55] = KEY_KPASTERISK, - [56] = KEY_LEFTALT, - [57] = KEY_SPACE, - [58] = KEY_CAPSLOCK, - [59] = KEY_F1, - [60] = KEY_F2, - [61] = KEY_F3, - [62] = KEY_F4, - [63] = KEY_F5, - [64] = KEY_F6, - [65] = KEY_F7, - [66] = KEY_F8, - [67] = KEY_F9, - [68] = KEY_F10, - [69] = KEY_NUMLOCK, - [70] = KEY_SCROLLLOCK, - [71] = KEY_KP7, - [72] = KEY_KP8, - [73] = KEY_KP9, - [74] = KEY_KPMINUS, - [75] = KEY_KP4, - [76] = KEY_KP5, - [77] = KEY_KP6, - [78] = KEY_KPPLUS, - [79] = KEY_KP1, - [80] = KEY_KP2, - [81] = KEY_KP3, - [82] = KEY_KP0, - [83] = KEY_KPDOT, - /* enables UK backslash+pipe key and FR lessthan+greaterthan key */ - [86] = KEY_102ND, - [87] = KEY_F11, - [88] = KEY_F12, - [90] = KEY_KPLEFTPAREN, - [91] = KEY_KPRIGHTPAREN, - [92] = KEY_KPASTERISK, - [93] = KEY_KPASTERISK, - [94] = KEY_KPPLUS, - [95] = KEY_HELP, - [96] = KEY_KPENTER, - [97] = KEY_RIGHTCTRL, - [98] = KEY_KPSLASH, - [99] = KEY_KPLEFTPAREN, - [100] = KEY_KPRIGHTPAREN, - [101] = KEY_KPSLASH, - [102] = KEY_HOME, - [103] = KEY_UP, - [104] = KEY_PAGEUP, - [105] = KEY_LEFT, - [106] = KEY_RIGHT, - [107] = KEY_END, - [108] = KEY_DOWN, - [109] = KEY_PAGEDOWN, - [110] = KEY_INSERT, - [111] = KEY_DELETE, - [112] = KEY_MACRO, - [113] = KEY_MUTE -}; - -/* - * This maps the <xx> in extended scancodes of the form "0xE0 <xx>" into - * keycodes. - */ -static const unsigned char visorkbd_ext_keycode[KEYCODE_TABLE_BYTES] = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */ - 0, 0, 0, 0, KEY_KPENTER, KEY_RIGHTCTRL, 0, 0, /* 0x18 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */ - KEY_RIGHTALT, 0, 0, 0, 0, 0, 0, 0, /* 0x28 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 */ - KEY_RIGHTALT /* AltGr */, 0, 0, 0, 0, 0, 0, 0, /* 0x38 */ - 0, 0, 0, 0, 0, 0, 0, KEY_HOME, /* 0x40 */ - KEY_UP, KEY_PAGEUP, 0, KEY_LEFT, 0, KEY_RIGHT, 0, KEY_END, /* 0x48 */ - KEY_DOWN, KEY_PAGEDOWN, KEY_INSERT, KEY_DELETE, 0, 0, 0, 0, /* 0x50 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x58 */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */ -}; - -static int visorinput_open(struct input_dev *visorinput_dev) -{ - struct visorinput_devdata *devdata = input_get_drvdata(visorinput_dev); - - if (!devdata) { - dev_err(&visorinput_dev->dev, - "%s input_get_drvdata(%p) returned NULL\n", - __func__, visorinput_dev); - return -EINVAL; - } - dev_dbg(&visorinput_dev->dev, "%s opened\n", __func__); - - /* - * If we're not paused, really enable interrupts. Regardless of whether - * we are paused, set a flag indicating interrupts should be enabled so - * when we resume, interrupts will really be enabled. - */ - mutex_lock(&devdata->lock_visor_dev); - devdata->interrupts_enabled = true; - if (devdata->paused) - goto out_unlock; - visorbus_enable_channel_interrupts(devdata->dev); - -out_unlock: - mutex_unlock(&devdata->lock_visor_dev); - return 0; -} - -static void visorinput_close(struct input_dev *visorinput_dev) -{ - struct visorinput_devdata *devdata = input_get_drvdata(visorinput_dev); - - if (!devdata) { - dev_err(&visorinput_dev->dev, - "%s input_get_drvdata(%p) returned NULL\n", - __func__, visorinput_dev); - return; - } - dev_dbg(&visorinput_dev->dev, "%s closed\n", __func__); - - /* - * If we're not paused, really disable interrupts. Regardless of - * whether we are paused, set a flag indicating interrupts should be - * disabled so when we resume we will not re-enable them. - */ - mutex_lock(&devdata->lock_visor_dev); - devdata->interrupts_enabled = false; - if (devdata->paused) - goto out_unlock; - visorbus_disable_channel_interrupts(devdata->dev); - -out_unlock: - mutex_unlock(&devdata->lock_visor_dev); -} - -/* - * setup_client_keyboard() initializes and returns a Linux input node that we - * can use to deliver keyboard inputs to Linux. We of course do this when we - * see keyboard inputs coming in on a keyboard channel. - */ -static struct input_dev *setup_client_keyboard(void *devdata, - unsigned char *keycode_table) - -{ - int i; - struct input_dev *visorinput_dev = input_allocate_device(); - - if (!visorinput_dev) - return NULL; - - visorinput_dev->name = "visor Keyboard"; - visorinput_dev->phys = "visorkbd:input0"; - visorinput_dev->id.bustype = BUS_VIRTUAL; - visorinput_dev->id.vendor = 0x0001; - visorinput_dev->id.product = 0x0001; - visorinput_dev->id.version = 0x0100; - - visorinput_dev->evbit[0] = BIT_MASK(EV_KEY) | - BIT_MASK(EV_REP) | - BIT_MASK(EV_LED); - visorinput_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | - BIT_MASK(LED_SCROLLL) | - BIT_MASK(LED_NUML); - visorinput_dev->keycode = keycode_table; - /* sizeof(unsigned char) */ - visorinput_dev->keycodesize = 1; - visorinput_dev->keycodemax = KEYCODE_TABLE_BYTES; - - for (i = 1; i < visorinput_dev->keycodemax; i++) - set_bit(keycode_table[i], visorinput_dev->keybit); - for (i = 1; i < visorinput_dev->keycodemax; i++) - set_bit(keycode_table[i + KEYCODE_TABLE_BYTES], - visorinput_dev->keybit); - - visorinput_dev->open = visorinput_open; - visorinput_dev->close = visorinput_close; - /* pre input_register! */ - input_set_drvdata(visorinput_dev, devdata); - - return visorinput_dev; -} - -static struct input_dev *setup_client_mouse(void *devdata, unsigned int xres, - unsigned int yres) -{ - struct input_dev *visorinput_dev = input_allocate_device(); - - if (!visorinput_dev) - return NULL; - - visorinput_dev->name = "visor Mouse"; - visorinput_dev->phys = "visormou:input0"; - visorinput_dev->id.bustype = BUS_VIRTUAL; - visorinput_dev->id.vendor = 0x0001; - visorinput_dev->id.product = 0x0002; - visorinput_dev->id.version = 0x0100; - - visorinput_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); - set_bit(BTN_LEFT, visorinput_dev->keybit); - set_bit(BTN_RIGHT, visorinput_dev->keybit); - set_bit(BTN_MIDDLE, visorinput_dev->keybit); - - if (xres == 0) - xres = PIXELS_ACROSS_DEFAULT; - if (yres == 0) - yres = PIXELS_DOWN_DEFAULT; - input_set_abs_params(visorinput_dev, ABS_X, 0, xres, 0, 0); - input_set_abs_params(visorinput_dev, ABS_Y, 0, yres, 0, 0); - - visorinput_dev->open = visorinput_open; - visorinput_dev->close = visorinput_close; - /* pre input_register! */ - input_set_drvdata(visorinput_dev, devdata); - input_set_capability(visorinput_dev, EV_REL, REL_WHEEL); - - return visorinput_dev; -} - -static struct visorinput_devdata *devdata_create(struct visor_device *dev, - enum visorinput_dev_type dtype) -{ - struct visorinput_devdata *devdata = NULL; - unsigned int extra_bytes = 0; - unsigned int size, xres, yres, err; - struct visor_input_channel_data data; - - if (dtype == visorinput_keyboard) - /* allocate room for devdata->keycode_table, filled in below */ - extra_bytes = KEYCODE_TABLE_BYTES * 2; - devdata = kzalloc(sizeof(*devdata) + extra_bytes, GFP_KERNEL); - if (!devdata) - return NULL; - mutex_init(&devdata->lock_visor_dev); - mutex_lock(&devdata->lock_visor_dev); - devdata->dev = dev; - - /* - * visorinput_open() can be called as soon as input_register_device() - * happens, and that will enable channel interrupts. Setting paused - * prevents us from getting into visorinput_channel_interrupt() prior - * to the device structure being totally initialized. - */ - devdata->paused = true; - - /* - * This is an input device in a client guest partition, so we need to - * create whatever input nodes are necessary to deliver our inputs to - * the guest OS. - */ - switch (dtype) { - case visorinput_keyboard: - devdata->keycode_table_bytes = extra_bytes; - memcpy(devdata->keycode_table, visorkbd_keycode, - KEYCODE_TABLE_BYTES); - memcpy(devdata->keycode_table + KEYCODE_TABLE_BYTES, - visorkbd_ext_keycode, KEYCODE_TABLE_BYTES); - devdata->visorinput_dev = setup_client_keyboard - (devdata, devdata->keycode_table); - if (!devdata->visorinput_dev) - goto cleanups_register; - break; - case visorinput_mouse: - size = sizeof(struct visor_input_channel_data); - err = visorbus_read_channel(dev, sizeof(struct channel_header), - &data, size); - if (err) - goto cleanups_register; - xres = data.mouse.x_res; - yres = data.mouse.y_res; - devdata->visorinput_dev = setup_client_mouse(devdata, xres, - yres); - if (!devdata->visorinput_dev) - goto cleanups_register; - break; - default: - /* No other input devices supported */ - break; - } - - dev_set_drvdata(&dev->device, devdata); - mutex_unlock(&devdata->lock_visor_dev); - - /* - * Device struct is completely set up now, with the exception of - * visorinput_dev being registered. We need to unlock before we - * register the device, because this can cause an on-stack call of - * visorinput_open(), which would deadlock if we had the lock. - */ - if (input_register_device(devdata->visorinput_dev)) { - input_free_device(devdata->visorinput_dev); - goto err_kfree_devdata; - } - - mutex_lock(&devdata->lock_visor_dev); - /* - * Establish calls to visorinput_channel_interrupt() if that is the - * desired state that we've kept track of in interrupts_enabled while - * the device was being created. - */ - devdata->paused = false; - if (devdata->interrupts_enabled) - visorbus_enable_channel_interrupts(dev); - mutex_unlock(&devdata->lock_visor_dev); - - return devdata; - -cleanups_register: - mutex_unlock(&devdata->lock_visor_dev); -err_kfree_devdata: - kfree(devdata); - return NULL; -} - -static int visorinput_probe(struct visor_device *dev) -{ - const guid_t *guid; - enum visorinput_dev_type dtype; - - guid = visorchannel_get_guid(dev->visorchannel); - if (guid_equal(guid, &visor_mouse_channel_guid)) - dtype = visorinput_mouse; - else if (guid_equal(guid, &visor_keyboard_channel_guid)) - dtype = visorinput_keyboard; - else - return -ENODEV; - visorbus_disable_channel_interrupts(dev); - if (!devdata_create(dev, dtype)) - return -ENOMEM; - return 0; -} - -static void unregister_client_input(struct input_dev *visorinput_dev) -{ - if (visorinput_dev) - input_unregister_device(visorinput_dev); -} - -static void visorinput_remove(struct visor_device *dev) -{ - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) - return; - - mutex_lock(&devdata->lock_visor_dev); - visorbus_disable_channel_interrupts(dev); - - /* - * due to above, at this time no thread of execution will be in - * visorinput_channel_interrupt() - */ - - dev_set_drvdata(&dev->device, NULL); - mutex_unlock(&devdata->lock_visor_dev); - - unregister_client_input(devdata->visorinput_dev); - kfree(devdata); -} - -/* - * Make it so the current locking state of the locking key indicated by - * <keycode> is as indicated by <desired_state> (1=locked, 0=unlocked). - */ -static void handle_locking_key(struct input_dev *visorinput_dev, int keycode, - int desired_state) -{ - int led; - - switch (keycode) { - case KEY_CAPSLOCK: - led = LED_CAPSL; - break; - case KEY_SCROLLLOCK: - led = LED_SCROLLL; - break; - case KEY_NUMLOCK: - led = LED_NUML; - break; - default: - return; - } - if (test_bit(led, visorinput_dev->led) != desired_state) { - input_report_key(visorinput_dev, keycode, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, keycode, 0); - input_sync(visorinput_dev); - __change_bit(led, visorinput_dev->led); - } -} - -/* - * <scancode> is either a 1-byte scancode, or an extended 16-bit scancode with - * 0xE0 in the low byte and the extended scancode value in the next higher byte. - */ -static int scancode_to_keycode(int scancode) -{ - if (scancode > 0xff) - return visorkbd_ext_keycode[(scancode >> 8) & 0xff]; - - return visorkbd_keycode[scancode]; -} - -static int calc_button(int x) -{ - switch (x) { - case 1: - return BTN_LEFT; - case 2: - return BTN_MIDDLE; - case 3: - return BTN_RIGHT; - default: - return -EINVAL; - } -} - -/* - * This is used only when this driver is active as an input driver in the - * client guest partition. It is called periodically so we can obtain inputs - * from the channel, and deliver them to the guest OS. - */ -static void visorinput_channel_interrupt(struct visor_device *dev) -{ - struct visor_inputreport r; - int scancode, keycode; - struct input_dev *visorinput_dev; - int xmotion, ymotion, button; - int i; - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) - return; - - visorinput_dev = devdata->visorinput_dev; - - while (!visorchannel_signalremove(dev->visorchannel, 0, &r)) { - scancode = r.activity.arg1; - keycode = scancode_to_keycode(scancode); - switch (r.activity.action) { - case INPUTACTION_KEY_DOWN: - input_report_key(visorinput_dev, keycode, 1); - input_sync(visorinput_dev); - break; - case INPUTACTION_KEY_UP: - input_report_key(visorinput_dev, keycode, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_KEY_DOWN_UP: - input_report_key(visorinput_dev, keycode, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, keycode, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_SET_LOCKING_KEY_STATE: - handle_locking_key(visorinput_dev, keycode, - r.activity.arg2); - break; - case INPUTACTION_XY_MOTION: - xmotion = r.activity.arg1; - ymotion = r.activity.arg2; - input_report_abs(visorinput_dev, ABS_X, xmotion); - input_report_abs(visorinput_dev, ABS_Y, ymotion); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_DOWN: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - input_report_key(visorinput_dev, button, 1); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_UP: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - input_report_key(visorinput_dev, button, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_CLICK: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - input_report_key(visorinput_dev, button, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, button, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_DCLICK: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - for (i = 0; i < 2; i++) { - input_report_key(visorinput_dev, button, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, button, 0); - input_sync(visorinput_dev); - } - break; - case INPUTACTION_WHEEL_ROTATE_AWAY: - input_report_rel(visorinput_dev, REL_WHEEL, 1); - input_sync(visorinput_dev); - break; - case INPUTACTION_WHEEL_ROTATE_TOWARD: - input_report_rel(visorinput_dev, REL_WHEEL, -1); - input_sync(visorinput_dev); - break; - default: - /* Unsupported input action */ - break; - } - } -} - -static int visorinput_pause(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - int rc; - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) { - rc = -ENODEV; - goto out; - } - - mutex_lock(&devdata->lock_visor_dev); - if (devdata->paused) { - rc = -EBUSY; - goto out_locked; - } - if (devdata->interrupts_enabled) - visorbus_disable_channel_interrupts(dev); - - /* - * due to above, at this time no thread of execution will be in - * visorinput_channel_interrupt() - */ - devdata->paused = true; - complete_func(dev, 0); - rc = 0; -out_locked: - mutex_unlock(&devdata->lock_visor_dev); -out: - return rc; -} - -static int visorinput_resume(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - int rc; - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) { - rc = -ENODEV; - goto out; - } - mutex_lock(&devdata->lock_visor_dev); - if (!devdata->paused) { - rc = -EBUSY; - goto out_locked; - } - devdata->paused = false; - complete_func(dev, 0); - - /* - * Re-establish calls to visorinput_channel_interrupt() if that is the - * desired state that we've kept track of in interrupts_enabled while - * the device was paused. - */ - if (devdata->interrupts_enabled) - visorbus_enable_channel_interrupts(dev); - - rc = 0; -out_locked: - mutex_unlock(&devdata->lock_visor_dev); -out: - return rc; -} - -/* GUIDS for all channel types supported by this driver. */ -static struct visor_channeltype_descriptor visorinput_channel_types[] = { - { VISOR_KEYBOARD_CHANNEL_GUID, "keyboard", - sizeof(struct channel_header), 0 }, - { VISOR_MOUSE_CHANNEL_GUID, "mouse", sizeof(struct channel_header), 0 }, - {} -}; - -static struct visor_driver visorinput_driver = { - .name = "visorinput", - .owner = THIS_MODULE, - .channel_types = visorinput_channel_types, - .probe = visorinput_probe, - .remove = visorinput_remove, - .channel_interrupt = visorinput_channel_interrupt, - .pause = visorinput_pause, - .resume = visorinput_resume, -}; - -module_driver(visorinput_driver, visorbus_register_visor_driver, - visorbus_unregister_visor_driver); - -MODULE_DEVICE_TABLE(visorbus, visorinput_channel_types); - -MODULE_AUTHOR("Unisys"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("s-Par human input driver for virtual keyboard/mouse"); - -MODULE_ALIAS("visorbus:" VISOR_MOUSE_CHANNEL_GUID_STR); -MODULE_ALIAS("visorbus:" VISOR_KEYBOARD_CHANNEL_GUID_STR); diff --git a/drivers/staging/unisys/visornic/Kconfig b/drivers/staging/unisys/visornic/Kconfig deleted file mode 100644 index 3f8f5570821b..000000000000 --- a/drivers/staging/unisys/visornic/Kconfig +++ /dev/null @@ -1,16 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Unisys visornic configuration -# - -config UNISYS_VISORNIC - tristate "Unisys visornic driver" - depends on UNISYSSPAR && UNISYS_VISORBUS && NET - help - The Unisys Visornic driver provides support for s-Par network - devices exposed on the s-Par visorbus. When a message is sent - to visorbus to create a network device, the probe function of - visornic is called to create the netdev device. Networking on - s-Par switches will not work if this driver is not selected. - If you say Y here, you will enable the Unisys visornic driver. - diff --git a/drivers/staging/unisys/visornic/Makefile b/drivers/staging/unisys/visornic/Makefile deleted file mode 100644 index f2984880c340..000000000000 --- a/drivers/staging/unisys/visornic/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for Unisys channel -# - -obj-$(CONFIG_UNISYS_VISORNIC) += visornic.o - -visornic-y := visornic_main.o - -ccflags-y += -I $(srctree)/$(src)/../include diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c deleted file mode 100644 index 62cd9b783732..000000000000 --- a/drivers/staging/unisys/visornic/visornic_main.c +++ /dev/null @@ -1,2150 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (c) 2012 - 2015 UNISYS CORPORATION - * All rights reserved. - */ - -/* This driver lives in a spar partition, and registers to ethernet io - * channels from the visorbus driver. It creates netdev devices and - * forwards transmit to the IO channel and accepts rcvs from the IO - * Partition via the IO channel. - */ - -#include <linux/debugfs.h> -#include <linux/etherdevice.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/kthread.h> -#include <linux/skbuff.h> -#include <linux/rtnetlink.h> -#include <linux/visorbus.h> - -#include "iochannel.h" - -#define VISORNIC_INFINITE_RSP_WAIT 0 - -/* MAX_BUF = 64 lines x 32 MAXVNIC x 80 characters - * = 163840 bytes - */ -#define MAX_BUF 163840 -#define NAPI_WEIGHT 64 - -/* GUIDS for director channel type supported by this driver. */ -/* {8cd5994d-c58e-11da-95a9-00e08161165f} */ -#define VISOR_VNIC_CHANNEL_GUID \ - GUID_INIT(0x8cd5994d, 0xc58e, 0x11da, \ - 0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f) -#define VISOR_VNIC_CHANNEL_GUID_STR \ - "8cd5994d-c58e-11da-95a9-00e08161165f" - -static struct visor_channeltype_descriptor visornic_channel_types[] = { - /* Note that the only channel type we expect to be reported by the - * bus driver is the VISOR_VNIC channel. - */ - { VISOR_VNIC_CHANNEL_GUID, "ultravnic", sizeof(struct channel_header), - VISOR_VNIC_CHANNEL_VERSIONID }, - {} -}; -MODULE_DEVICE_TABLE(visorbus, visornic_channel_types); -/* FIXME XXX: This next line of code must be fixed and removed before - * acceptance into the 'normal' part of the kernel. It is only here as a place - * holder to get module autoloading functionality working for visorbus. Code - * must be added to scripts/mode/file2alias.c, etc., to get this working - * properly. - */ -MODULE_ALIAS("visorbus:" VISOR_VNIC_CHANNEL_GUID_STR); - -struct chanstat { - unsigned long got_rcv; - unsigned long got_enbdisack; - unsigned long got_xmit_done; - unsigned long xmit_fail; - unsigned long sent_enbdis; - unsigned long sent_promisc; - unsigned long sent_post; - unsigned long sent_post_failed; - unsigned long sent_xmit; - unsigned long reject_count; - unsigned long extra_rcvbufs_sent; -}; - -/* struct visornic_devdata - * @enabled: 0 disabled 1 enabled to receive. - * @enab_dis_acked: NET_RCV_ENABLE/DISABLE acked by IOPART. - * @struct *dev: - * @struct *netdev: - * @struct net_stats: - * @interrupt_rcvd: - * @rsp_queue: - * @struct **rcvbuf: - * @incarnation_id: incarnation_id lets IOPART know about - * re-birth. - * @old_flags: flags as they were prior to - * set_multicast_list. - * @usage: count of users. - * @num_rcv_bufs: number of rcv buffers the vnic will post. - * @num_rcv_bufs_could_not_alloc: - * @num_rcvbuf_in_iovm: - * @alloc_failed_in_if_needed_cnt: - * @alloc_failed_in_repost_rtn_cnt: - * @max_outstanding_net_xmits: absolute max number of outstanding xmits - * - should never hit this. - * @upper_threshold_net_xmits: high water mark for calling - * netif_stop_queue(). - * @lower_threshold_net_xmits: high water mark for calling - * netif_wake_queue(). - * @struct xmitbufhead: xmitbufhead - head of the xmit buffer list - * sent to the IOPART end. - * @server_down_complete_func: - * @struct timeout_reset: - * @struct *cmdrsp_rcv: cmdrsp_rcv is used for posting/unposting rcv - * buffers. - * @struct *xmit_cmdrsp: xmit_cmdrsp - issues NET_XMIT - only one - * active xmit at a time. - * @server_down: IOPART is down. - * @server_change_state: Processing SERVER_CHANGESTATE msg. - * @going_away: device is being torn down. - * @struct *eth_debugfs_dir: - * @interrupts_rcvd: - * @interrupts_notme: - * @interrupts_disabled: - * @busy_cnt: - * @priv_lock: spinlock to access devdata structures. - * @flow_control_upper_hits: - * @flow_control_lower_hits: - * @n_rcv0: # rcvs of 0 buffers. - * @n_rcv1: # rcvs of 1 buffers. - * @n_rcv2: # rcvs of 2 buffers. - * @n_rcvx: # rcvs of >2 buffers. - * @found_repost_rcvbuf_cnt: # repost_rcvbuf_cnt. - * @repost_found_skb_cnt: # of found the skb. - * @n_repost_deficit: # of lost rcv buffers. - * @bad_rcv_buf: # of unknown rcv skb not freed. - * @n_rcv_packets_not_accepted: # bogs rcv packets. - * @queuefullmsg_logged: - * @struct chstat: - * @struct napi: - * @struct cmdrsp: - */ -struct visornic_devdata { - unsigned short enabled; - unsigned short enab_dis_acked; - - struct visor_device *dev; - struct net_device *netdev; - struct net_device_stats net_stats; - atomic_t interrupt_rcvd; - wait_queue_head_t rsp_queue; - struct sk_buff **rcvbuf; - u64 incarnation_id; - unsigned short old_flags; - atomic_t usage; - - int num_rcv_bufs; - int num_rcv_bufs_could_not_alloc; - atomic_t num_rcvbuf_in_iovm; - unsigned long alloc_failed_in_if_needed_cnt; - unsigned long alloc_failed_in_repost_rtn_cnt; - - unsigned long max_outstanding_net_xmits; - unsigned long upper_threshold_net_xmits; - unsigned long lower_threshold_net_xmits; - struct sk_buff_head xmitbufhead; - - visorbus_state_complete_func server_down_complete_func; - struct work_struct timeout_reset; - struct uiscmdrsp *cmdrsp_rcv; - struct uiscmdrsp *xmit_cmdrsp; - bool server_down; - bool server_change_state; - bool going_away; - struct dentry *eth_debugfs_dir; - u64 interrupts_rcvd; - u64 interrupts_notme; - u64 interrupts_disabled; - u64 busy_cnt; - /* spinlock to access devdata structures. */ - spinlock_t priv_lock; - - /* flow control counter */ - u64 flow_control_upper_hits; - u64 flow_control_lower_hits; - - /* debug counters */ - unsigned long n_rcv0; - unsigned long n_rcv1; - unsigned long n_rcv2; - unsigned long n_rcvx; - unsigned long found_repost_rcvbuf_cnt; - unsigned long repost_found_skb_cnt; - unsigned long n_repost_deficit; - unsigned long bad_rcv_buf; - unsigned long n_rcv_packets_not_accepted; - - int queuefullmsg_logged; - struct chanstat chstat; - struct napi_struct napi; - struct uiscmdrsp cmdrsp[SIZEOF_CMDRSP]; -}; - -/* Returns next non-zero index on success or 0 on failure (i.e. out of room). */ -static u16 add_physinfo_entries(u64 inp_pfn, u16 inp_off, u16 inp_len, - u16 index, u16 max_pi_arr_entries, - struct phys_info pi_arr[]) -{ - u16 i, len, firstlen; - - firstlen = PI_PAGE_SIZE - inp_off; - if (inp_len <= firstlen) { - /* The input entry spans only one page - add as is. */ - if (index >= max_pi_arr_entries) - return 0; - pi_arr[index].pi_pfn = inp_pfn; - pi_arr[index].pi_off = (u16)inp_off; - pi_arr[index].pi_len = (u16)inp_len; - return index + 1; - } - - /* This entry spans multiple pages. */ - for (len = inp_len, i = 0; len; - len -= pi_arr[index + i].pi_len, i++) { - if (index + i >= max_pi_arr_entries) - return 0; - pi_arr[index + i].pi_pfn = inp_pfn + i; - if (i == 0) { - pi_arr[index].pi_off = inp_off; - pi_arr[index].pi_len = firstlen; - } else { - pi_arr[index + i].pi_off = 0; - pi_arr[index + i].pi_len = min_t(u16, len, - PI_PAGE_SIZE); - } - } - return index + i; -} - -/* visor_copy_fragsinfo_from_skb - copy fragment list in the SKB to a phys_info - * array that the IOPART understands - * @skb: Skbuff that we are pulling the frags from. - * @firstfraglen: Length of first fragment in skb. - * @frags_max: Max len of frags array. - * @frags: Frags array filled in on output. - * - * Return: Positive integer indicating number of entries filled in frags on - * success, negative integer on error. - */ -static int visor_copy_fragsinfo_from_skb(struct sk_buff *skb, - unsigned int firstfraglen, - unsigned int frags_max, - struct phys_info frags[]) -{ - unsigned int count = 0, frag, size, offset = 0, numfrags; - unsigned int total_count; - - numfrags = skb_shinfo(skb)->nr_frags; - - /* Compute the number of fragments this skb has, and if its more than - * frag array can hold, linearize the skb - */ - total_count = numfrags + (firstfraglen / PI_PAGE_SIZE); - if (firstfraglen % PI_PAGE_SIZE) - total_count++; - - if (total_count > frags_max) { - if (skb_linearize(skb)) - return -EINVAL; - numfrags = skb_shinfo(skb)->nr_frags; - firstfraglen = 0; - } - - while (firstfraglen) { - if (count == frags_max) - return -EINVAL; - - frags[count].pi_pfn = - page_to_pfn(virt_to_page(skb->data + offset)); - frags[count].pi_off = - (unsigned long)(skb->data + offset) & PI_PAGE_MASK; - size = min_t(unsigned int, firstfraglen, - PI_PAGE_SIZE - frags[count].pi_off); - - /* can take smallest of firstfraglen (what's left) OR - * bytes left in the page - */ - frags[count].pi_len = size; - firstfraglen -= size; - offset += size; - count++; - } - if (numfrags) { - if ((count + numfrags) > frags_max) - return -EINVAL; - - for (frag = 0; frag < numfrags; frag++) { - count = add_physinfo_entries(page_to_pfn( - skb_frag_page(&skb_shinfo(skb)->frags[frag])), - skb_frag_off(&skb_shinfo(skb)->frags[frag]), - skb_frag_size(&skb_shinfo(skb)->frags[frag]), - count, frags_max, frags); - /* add_physinfo_entries only returns - * zero if the frags array is out of room - * That should never happen because we - * fail above, if count+numfrags > frags_max. - */ - if (!count) - return -EINVAL; - } - } - if (skb_shinfo(skb)->frag_list) { - struct sk_buff *skbinlist; - int c; - - for (skbinlist = skb_shinfo(skb)->frag_list; skbinlist; - skbinlist = skbinlist->next) { - c = visor_copy_fragsinfo_from_skb(skbinlist, - skbinlist->len - - skbinlist->data_len, - frags_max - count, - &frags[count]); - if (c < 0) - return c; - count += c; - } - } - return count; -} - -static ssize_t enable_ints_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *ppos) -{ - /* Don't want to break ABI here by having a debugfs - * file that no longer exists or is writable, so - * lets just make this a vestigual function - */ - return count; -} - -static const struct file_operations debugfs_enable_ints_fops = { - .write = enable_ints_write, -}; - -/* visornic_serverdown_complete - pause device following IOPART going down - * @devdata: Device managed by IOPART. - * - * The IO partition has gone down, and we need to do some cleanup for when it - * comes back. Treat the IO partition as the link being down. - */ -static void visornic_serverdown_complete(struct visornic_devdata *devdata) -{ - struct net_device *netdev = devdata->netdev; - - /* Stop polling for interrupts */ - visorbus_disable_channel_interrupts(devdata->dev); - - rtnl_lock(); - dev_close(netdev); - rtnl_unlock(); - - atomic_set(&devdata->num_rcvbuf_in_iovm, 0); - devdata->chstat.sent_xmit = 0; - devdata->chstat.got_xmit_done = 0; - - if (devdata->server_down_complete_func) - (*devdata->server_down_complete_func)(devdata->dev, 0); - - devdata->server_down = true; - devdata->server_change_state = false; - devdata->server_down_complete_func = NULL; -} - -/* visornic_serverdown - Command has notified us that IOPART is down - * @devdata: Device managed by IOPART. - * @complete_func: Function to call when finished. - * - * Schedule the work needed to handle the server down request. Make sure we - * haven't already handled the server change state event. - * - * Return: 0 if we scheduled the work, negative integer on error. - */ -static int visornic_serverdown(struct visornic_devdata *devdata, - visorbus_state_complete_func complete_func) -{ - unsigned long flags; - int err; - - spin_lock_irqsave(&devdata->priv_lock, flags); - if (devdata->server_change_state) { - dev_dbg(&devdata->dev->device, "%s changing state\n", - __func__); - err = -EINVAL; - goto err_unlock; - } - if (devdata->server_down) { - dev_dbg(&devdata->dev->device, "%s already down\n", - __func__); - err = -EINVAL; - goto err_unlock; - } - if (devdata->going_away) { - dev_dbg(&devdata->dev->device, - "%s aborting because device removal pending\n", - __func__); - err = -ENODEV; - goto err_unlock; - } - devdata->server_change_state = true; - devdata->server_down_complete_func = complete_func; - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - visornic_serverdown_complete(devdata); - return 0; - -err_unlock: - spin_unlock_irqrestore(&devdata->priv_lock, flags); - return err; -} - -/* alloc_rcv_buf - alloc rcv buffer to be given to the IO Partition - * @netdev: Network adapter the rcv bufs are attached too. - * - * Create an sk_buff (rcv_buf) that will be passed to the IO Partition - * so that it can write rcv data into our memory space. - * - * Return: Pointer to sk_buff. - */ -static struct sk_buff *alloc_rcv_buf(struct net_device *netdev) -{ - struct sk_buff *skb; - - /* NOTE: the first fragment in each rcv buffer is pointed to by - * rcvskb->data. For now all rcv buffers will be RCVPOST_BUF_SIZE - * in length, so the first frag is large enough to hold 1514. - */ - skb = alloc_skb(RCVPOST_BUF_SIZE, GFP_ATOMIC); - if (!skb) - return NULL; - skb->dev = netdev; - /* current value of mtu doesn't come into play here; large - * packets will just end up using multiple rcv buffers all of - * same size. - */ - skb->len = RCVPOST_BUF_SIZE; - /* alloc_skb already zeroes it out for clarification. */ - skb->data_len = 0; - return skb; -} - -/* post_skb - post a skb to the IO Partition - * @cmdrsp: Cmdrsp packet to be send to the IO Partition. - * @devdata: visornic_devdata to post the skb to. - * @skb: Skb to give to the IO partition. - * - * Return: 0 on success, negative integer on error. - */ -static int post_skb(struct uiscmdrsp *cmdrsp, struct visornic_devdata *devdata, - struct sk_buff *skb) -{ - int err; - - cmdrsp->net.buf = skb; - cmdrsp->net.rcvpost.frag.pi_pfn = page_to_pfn(virt_to_page(skb->data)); - cmdrsp->net.rcvpost.frag.pi_off = - (unsigned long)skb->data & PI_PAGE_MASK; - cmdrsp->net.rcvpost.frag.pi_len = skb->len; - cmdrsp->net.rcvpost.unique_num = devdata->incarnation_id; - - if ((cmdrsp->net.rcvpost.frag.pi_off + skb->len) > PI_PAGE_SIZE) - return -EINVAL; - - cmdrsp->net.type = NET_RCV_POST; - cmdrsp->cmdtype = CMD_NET_TYPE; - err = visorchannel_signalinsert(devdata->dev->visorchannel, - IOCHAN_TO_IOPART, - cmdrsp); - if (err) { - devdata->chstat.sent_post_failed++; - return err; - } - - atomic_inc(&devdata->num_rcvbuf_in_iovm); - devdata->chstat.sent_post++; - return 0; -} - -/* send_enbdis - Send NET_RCV_ENBDIS to IO Partition - * @netdev: Netdevice we are enabling/disabling, used as context return value. - * @state: Enable = 1/disable = 0. - * @devdata: Visornic device we are enabling/disabling. - * - * Send the enable/disable message to the IO Partition. - * - * Return: 0 on success, negative integer on error. - */ -static int send_enbdis(struct net_device *netdev, int state, - struct visornic_devdata *devdata) -{ - int err; - - devdata->cmdrsp_rcv->net.enbdis.enable = state; - devdata->cmdrsp_rcv->net.enbdis.context = netdev; - devdata->cmdrsp_rcv->net.type = NET_RCV_ENBDIS; - devdata->cmdrsp_rcv->cmdtype = CMD_NET_TYPE; - err = visorchannel_signalinsert(devdata->dev->visorchannel, - IOCHAN_TO_IOPART, - devdata->cmdrsp_rcv); - if (err) - return err; - devdata->chstat.sent_enbdis++; - return 0; -} - -/* visornic_disable_with_timeout - disable network adapter - * @netdev: netdevice to disable. - * @timeout: Timeout to wait for disable. - * - * Disable the network adapter and inform the IO Partition that we are disabled. - * Reclaim memory from rcv bufs. - * - * Return: 0 on success, negative integer on failure of IO Partition responding. - */ -static int visornic_disable_with_timeout(struct net_device *netdev, - const int timeout) -{ - struct visornic_devdata *devdata = netdev_priv(netdev); - int i; - unsigned long flags; - int wait = 0; - int err; - - /* send a msg telling the other end we are stopping incoming pkts */ - spin_lock_irqsave(&devdata->priv_lock, flags); - devdata->enabled = 0; - /* must wait for ack */ - devdata->enab_dis_acked = 0; - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - /* send disable and wait for ack -- don't hold lock when sending - * disable because if the queue is full, insert might sleep. - * If an error occurs, don't wait for the timeout. - */ - err = send_enbdis(netdev, 0, devdata); - if (err) - return err; - - /* wait for ack to arrive before we try to free rcv buffers - * NOTE: the other end automatically unposts the rcv buffers - * when it gets a disable. - */ - spin_lock_irqsave(&devdata->priv_lock, flags); - while ((timeout == VISORNIC_INFINITE_RSP_WAIT) || - (wait < timeout)) { - if (devdata->enab_dis_acked) - break; - if (devdata->server_down || devdata->server_change_state) { - dev_dbg(&netdev->dev, "%s server went away\n", - __func__); - break; - } - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&devdata->priv_lock, flags); - wait += schedule_timeout(msecs_to_jiffies(10)); - spin_lock_irqsave(&devdata->priv_lock, flags); - } - - /* Wait for usage to go to 1 (no other users) before freeing - * rcv buffers - */ - if (atomic_read(&devdata->usage) > 1) { - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&devdata->priv_lock, flags); - schedule_timeout(msecs_to_jiffies(10)); - spin_lock_irqsave(&devdata->priv_lock, flags); - if (atomic_read(&devdata->usage)) - break; - } - } - /* we've set enabled to 0, so we can give up the lock. */ - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - /* stop the transmit queue so nothing more can be transmitted */ - netif_stop_queue(netdev); - - napi_disable(&devdata->napi); - - skb_queue_purge(&devdata->xmitbufhead); - - /* Free rcv buffers - other end has automatically unposed them on - * disable - */ - for (i = 0; i < devdata->num_rcv_bufs; i++) { - if (devdata->rcvbuf[i]) { - kfree_skb(devdata->rcvbuf[i]); - devdata->rcvbuf[i] = NULL; - } - } - - return 0; -} - -/* init_rcv_bufs - initialize receive buffs and send them to the IO Partition - * @netdev: struct netdevice. - * @devdata: visornic_devdata. - * - * Allocate rcv buffers and post them to the IO Partition. - * - * Return: 0 on success, negative integer on failure. - */ -static int init_rcv_bufs(struct net_device *netdev, - struct visornic_devdata *devdata) -{ - int i, j, count, err; - - /* allocate fixed number of receive buffers to post to uisnic - * post receive buffers after we've allocated a required amount - */ - for (i = 0; i < devdata->num_rcv_bufs; i++) { - devdata->rcvbuf[i] = alloc_rcv_buf(netdev); - /* if we failed to allocate one let us stop */ - if (!devdata->rcvbuf[i]) - break; - } - /* couldn't even allocate one -- bail out */ - if (i == 0) - return -ENOMEM; - count = i; - - /* Ensure we can alloc 2/3rd of the requested number of buffers. - * 2/3 is an arbitrary choice; used also in ndis init.c - */ - if (count < ((2 * devdata->num_rcv_bufs) / 3)) { - /* free receive buffers we did alloc and then bail out */ - for (i = 0; i < count; i++) { - kfree_skb(devdata->rcvbuf[i]); - devdata->rcvbuf[i] = NULL; - } - return -ENOMEM; - } - - /* post receive buffers to receive incoming input - without holding - * lock - we've not enabled nor started the queue so there shouldn't - * be any rcv or xmit activity - */ - for (i = 0; i < count; i++) { - err = post_skb(devdata->cmdrsp_rcv, devdata, - devdata->rcvbuf[i]); - if (!err) - continue; - - /* Error handling - - * If we posted at least one skb, we should return success, - * but need to free the resources that we have not successfully - * posted. - */ - for (j = i; j < count; j++) { - kfree_skb(devdata->rcvbuf[j]); - devdata->rcvbuf[j] = NULL; - } - if (i == 0) - return err; - break; - } - - return 0; -} - -/* visornic_enable_with_timeout - send enable to IO Partition - * @netdev: struct net_device. - * @timeout: Time to wait for the ACK from the enable. - * - * Sends enable to IOVM and inits, and posts receive buffers to IOVM. Timeout is - * defined in msecs (timeout of 0 specifies infinite wait). - * - * Return: 0 on success, negative integer on failure. - */ -static int visornic_enable_with_timeout(struct net_device *netdev, - const int timeout) -{ - int err = 0; - struct visornic_devdata *devdata = netdev_priv(netdev); - unsigned long flags; - int wait = 0; - - napi_enable(&devdata->napi); - - /* NOTE: the other end automatically unposts the rcv buffers when it - * gets a disable. - */ - err = init_rcv_bufs(netdev, devdata); - if (err < 0) { - dev_err(&netdev->dev, - "%s failed to init rcv bufs\n", __func__); - return err; - } - - spin_lock_irqsave(&devdata->priv_lock, flags); - devdata->enabled = 1; - devdata->enab_dis_acked = 0; - - /* now we're ready, let's send an ENB to uisnic but until we get - * an ACK back from uisnic, we'll drop the packets - */ - devdata->n_rcv_packets_not_accepted = 0; - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - /* send enable and wait for ack -- don't hold lock when sending enable - * because if the queue is full, insert might sleep. If an error - * occurs error out. - */ - err = send_enbdis(netdev, 1, devdata); - if (err) - return err; - - spin_lock_irqsave(&devdata->priv_lock, flags); - while ((timeout == VISORNIC_INFINITE_RSP_WAIT) || - (wait < timeout)) { - if (devdata->enab_dis_acked) - break; - if (devdata->server_down || devdata->server_change_state) { - dev_dbg(&netdev->dev, "%s server went away\n", - __func__); - break; - } - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&devdata->priv_lock, flags); - wait += schedule_timeout(msecs_to_jiffies(10)); - spin_lock_irqsave(&devdata->priv_lock, flags); - } - - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - if (!devdata->enab_dis_acked) { - dev_err(&netdev->dev, "%s missing ACK\n", __func__); - return -EIO; - } - - netif_start_queue(netdev); - return 0; -} - -/* visornic_timeout_reset - handle xmit timeout resets - * @work: Work item that scheduled the work. - * - * Transmit timeouts are typically handled by resetting the device for our - * virtual NIC; we will send a disable and enable to the IOVM. If it doesn't - * respond, we will trigger a serverdown. - */ -static void visornic_timeout_reset(struct work_struct *work) -{ - struct visornic_devdata *devdata; - struct net_device *netdev; - int response = 0; - - devdata = container_of(work, struct visornic_devdata, timeout_reset); - netdev = devdata->netdev; - - rtnl_lock(); - if (!netif_running(netdev)) { - rtnl_unlock(); - return; - } - - response = visornic_disable_with_timeout(netdev, - VISORNIC_INFINITE_RSP_WAIT); - if (response) - goto call_serverdown; - - response = visornic_enable_with_timeout(netdev, - VISORNIC_INFINITE_RSP_WAIT); - if (response) - goto call_serverdown; - - rtnl_unlock(); - - return; - -call_serverdown: - visornic_serverdown(devdata, NULL); - rtnl_unlock(); -} - -/* visornic_open - enable the visornic device and mark the queue started - * @netdev: netdevice to start. - * - * Enable the device and start the transmit queue. - * - * Return: 0 on success. - */ -static int visornic_open(struct net_device *netdev) -{ - visornic_enable_with_timeout(netdev, VISORNIC_INFINITE_RSP_WAIT); - return 0; -} - -/* visornic_close - disables the visornic device and stops the queues - * @netdev: netdevice to stop. - * - * Disable the device and stop the transmit queue. - * - * Return 0 on success. - */ -static int visornic_close(struct net_device *netdev) -{ - visornic_disable_with_timeout(netdev, VISORNIC_INFINITE_RSP_WAIT); - return 0; -} - -/* devdata_xmits_outstanding - compute outstanding xmits - * @devdata: visornic_devdata for device - * - * Return: Long integer representing the number of outstanding xmits. - */ -static unsigned long devdata_xmits_outstanding(struct visornic_devdata *devdata) -{ - if (devdata->chstat.sent_xmit >= devdata->chstat.got_xmit_done) - return devdata->chstat.sent_xmit - - devdata->chstat.got_xmit_done; - return (ULONG_MAX - devdata->chstat.got_xmit_done - + devdata->chstat.sent_xmit + 1); -} - -/* vnic_hit_high_watermark - * @devdata: Indicates visornic device we are checking. - * @high_watermark: Max num of unacked xmits we will tolerate before we will - * start throttling. - * - * Return: True iff the number of unacked xmits sent to the IO Partition is >= - * high_watermark. False otherwise. - */ -static bool vnic_hit_high_watermark(struct visornic_devdata *devdata, - ulong high_watermark) -{ - return (devdata_xmits_outstanding(devdata) >= high_watermark); -} - -/* vnic_hit_low_watermark - * @devdata: Indicates visornic device we are checking. - * @low_watermark: We will wait until the num of unacked xmits drops to this - * value or lower before we start transmitting again. - * - * Return: True iff the number of unacked xmits sent to the IO Partition is <= - * low_watermark. - */ -static bool vnic_hit_low_watermark(struct visornic_devdata *devdata, - ulong low_watermark) -{ - return (devdata_xmits_outstanding(devdata) <= low_watermark); -} - -/* visornic_xmit - send a packet to the IO Partition - * @skb: Packet to be sent. - * @netdev: Net device the packet is being sent from. - * - * Convert the skb to a cmdrsp so the IO Partition can understand it, and send - * the XMIT command to the IO Partition for processing. This function is - * protected from concurrent calls by a spinlock xmit_lock in the net_device - * struct. As soon as the function returns, it can be called again. - * - * Return: NETDEV_TX_OK. - */ -static netdev_tx_t visornic_xmit(struct sk_buff *skb, struct net_device *netdev) -{ - struct visornic_devdata *devdata; - int len, firstfraglen, padlen; - struct uiscmdrsp *cmdrsp = NULL; - unsigned long flags; - int err; - - devdata = netdev_priv(netdev); - spin_lock_irqsave(&devdata->priv_lock, flags); - - if (netif_queue_stopped(netdev) || devdata->server_down || - devdata->server_change_state) { - spin_unlock_irqrestore(&devdata->priv_lock, flags); - devdata->busy_cnt++; - dev_dbg(&netdev->dev, - "%s busy - queue stopped\n", __func__); - kfree_skb(skb); - return NETDEV_TX_OK; - } - - /* sk_buff struct is used to host network data throughout all the - * linux network subsystems - */ - len = skb->len; - - /* skb->len is the FULL length of data (including fragmentary portion) - * skb->data_len is the length of the fragment portion in frags - * skb->len - skb->data_len is size of the 1st fragment in skb->data - * calculate the length of the first fragment that skb->data is - * pointing to - */ - firstfraglen = skb->len - skb->data_len; - if (firstfraglen < ETH_HLEN) { - spin_unlock_irqrestore(&devdata->priv_lock, flags); - devdata->busy_cnt++; - dev_err(&netdev->dev, - "%s busy - first frag too small (%d)\n", - __func__, firstfraglen); - kfree_skb(skb); - return NETDEV_TX_OK; - } - - if (len < ETH_MIN_PACKET_SIZE && - ((skb_end_pointer(skb) - skb->data) >= ETH_MIN_PACKET_SIZE)) { - /* pad the packet out to minimum size */ - padlen = ETH_MIN_PACKET_SIZE - len; - skb_put_zero(skb, padlen); - len += padlen; - firstfraglen += padlen; - } - - cmdrsp = devdata->xmit_cmdrsp; - /* clear cmdrsp */ - memset(cmdrsp, 0, SIZEOF_CMDRSP); - cmdrsp->net.type = NET_XMIT; - cmdrsp->cmdtype = CMD_NET_TYPE; - - /* save the pointer to skb -- we'll need it for completion */ - cmdrsp->net.buf = skb; - - if (vnic_hit_high_watermark(devdata, - devdata->max_outstanding_net_xmits)) { - /* extra NET_XMITs queued over to IOVM - need to wait */ - devdata->chstat.reject_count++; - if (!devdata->queuefullmsg_logged && - ((devdata->chstat.reject_count & 0x3ff) == 1)) - devdata->queuefullmsg_logged = 1; - netif_stop_queue(netdev); - spin_unlock_irqrestore(&devdata->priv_lock, flags); - devdata->busy_cnt++; - dev_dbg(&netdev->dev, - "%s busy - waiting for iovm to catch up\n", - __func__); - kfree_skb(skb); - return NETDEV_TX_OK; - } - if (devdata->queuefullmsg_logged) - devdata->queuefullmsg_logged = 0; - - if (skb->ip_summed == CHECKSUM_UNNECESSARY) { - cmdrsp->net.xmt.lincsum.valid = 1; - cmdrsp->net.xmt.lincsum.protocol = skb->protocol; - if (skb_transport_header(skb) > skb->data) { - cmdrsp->net.xmt.lincsum.hrawoff = - skb_transport_header(skb) - skb->data; - cmdrsp->net.xmt.lincsum.hrawoff = 1; - } - if (skb_network_header(skb) > skb->data) { - cmdrsp->net.xmt.lincsum.nhrawoff = - skb_network_header(skb) - skb->data; - cmdrsp->net.xmt.lincsum.nhrawoffv = 1; - } - cmdrsp->net.xmt.lincsum.csum = skb->csum; - } else { - cmdrsp->net.xmt.lincsum.valid = 0; - } - - /* save off the length of the entire data packet */ - cmdrsp->net.xmt.len = len; - - /* copy ethernet header from first frag into ocmdrsp - * - everything else will be pass in frags & DMA'ed - */ - memcpy(cmdrsp->net.xmt.ethhdr, skb->data, ETH_HLEN); - - /* copy frags info - from skb->data we need to only provide access - * beyond eth header - */ - cmdrsp->net.xmt.num_frags = - visor_copy_fragsinfo_from_skb(skb, firstfraglen, - MAX_PHYS_INFO, - cmdrsp->net.xmt.frags); - if (cmdrsp->net.xmt.num_frags < 0) { - spin_unlock_irqrestore(&devdata->priv_lock, flags); - devdata->busy_cnt++; - dev_err(&netdev->dev, - "%s busy - copy frags failed\n", __func__); - kfree_skb(skb); - return NETDEV_TX_OK; - } - - err = visorchannel_signalinsert(devdata->dev->visorchannel, - IOCHAN_TO_IOPART, cmdrsp); - if (err) { - netif_stop_queue(netdev); - spin_unlock_irqrestore(&devdata->priv_lock, flags); - devdata->busy_cnt++; - dev_dbg(&netdev->dev, - "%s busy - signalinsert failed\n", __func__); - kfree_skb(skb); - return NETDEV_TX_OK; - } - - /* Track the skbs that have been sent to the IOVM for XMIT */ - skb_queue_head(&devdata->xmitbufhead, skb); - - /* update xmt stats */ - devdata->net_stats.tx_packets++; - devdata->net_stats.tx_bytes += skb->len; - devdata->chstat.sent_xmit++; - - /* check if we have hit the high watermark for netif_stop_queue() */ - if (vnic_hit_high_watermark(devdata, - devdata->upper_threshold_net_xmits)) { - /* extra NET_XMITs queued over to IOVM - need to wait */ - /* stop queue - call netif_wake_queue() after lower threshold */ - netif_stop_queue(netdev); - dev_dbg(&netdev->dev, - "%s busy - invoking iovm flow control\n", - __func__); - devdata->flow_control_upper_hits++; - } - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - /* skb will be freed when we get back NET_XMIT_DONE */ - return NETDEV_TX_OK; -} - -/* visornic_get_stats - returns net_stats of the visornic device - * @netdev: netdevice. - * - * Return: Pointer to the net_device_stats struct for the device. - */ -static struct net_device_stats *visornic_get_stats(struct net_device *netdev) -{ - struct visornic_devdata *devdata = netdev_priv(netdev); - - return &devdata->net_stats; -} - -/* visornic_change_mtu - changes mtu of device - * @netdev: netdevice. - * @new_mtu: Value of new mtu. - * - * The device's MTU cannot be changed by system; it must be changed via a - * CONTROLVM message. All vnics and pnics in a switch have to have the same MTU - * for everything to work. Currently not supported. - * - * Return: -EINVAL. - */ -static int visornic_change_mtu(struct net_device *netdev, int new_mtu) -{ - return -EINVAL; -} - -/* visornic_set_multi - set visornic device flags - * @netdev: netdevice. - * - * The only flag we currently support is IFF_PROMISC. - */ -static void visornic_set_multi(struct net_device *netdev) -{ - struct uiscmdrsp *cmdrsp; - struct visornic_devdata *devdata = netdev_priv(netdev); - int err = 0; - - if (devdata->old_flags == netdev->flags) - return; - - if ((netdev->flags & IFF_PROMISC) == - (devdata->old_flags & IFF_PROMISC)) - goto out_save_flags; - - cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC); - if (!cmdrsp) - return; - cmdrsp->cmdtype = CMD_NET_TYPE; - cmdrsp->net.type = NET_RCV_PROMISC; - cmdrsp->net.enbdis.context = netdev; - cmdrsp->net.enbdis.enable = - netdev->flags & IFF_PROMISC; - err = visorchannel_signalinsert(devdata->dev->visorchannel, - IOCHAN_TO_IOPART, - cmdrsp); - kfree(cmdrsp); - if (err) - return; - -out_save_flags: - devdata->old_flags = netdev->flags; -} - -/* visornic_xmit_timeout - request to timeout the xmit - * @netdev: netdevice. - * - * Queue the work and return. Make sure we have not already been informed that - * the IO Partition is gone; if so, we will have already timed-out the xmits. - */ -static void visornic_xmit_timeout(struct net_device *netdev, unsigned int txqueue) -{ - struct visornic_devdata *devdata = netdev_priv(netdev); - unsigned long flags; - - spin_lock_irqsave(&devdata->priv_lock, flags); - if (devdata->going_away) { - spin_unlock_irqrestore(&devdata->priv_lock, flags); - dev_dbg(&devdata->dev->device, - "%s aborting because device removal pending\n", - __func__); - return; - } - - /* Ensure that a ServerDown message hasn't been received */ - if (!devdata->enabled || - (devdata->server_down && !devdata->server_change_state)) { - dev_dbg(&netdev->dev, "%s no processing\n", - __func__); - spin_unlock_irqrestore(&devdata->priv_lock, flags); - return; - } - schedule_work(&devdata->timeout_reset); - spin_unlock_irqrestore(&devdata->priv_lock, flags); -} - -/* repost_return - repost rcv bufs that have come back - * @cmdrsp: IO channel command struct to post. - * @devdata: Visornic devdata for the device. - * @skb: Socket buffer. - * @netdev: netdevice. - * - * Repost rcv buffers that have been returned to us when we are finished - * with them. - * - * Return: 0 for success, negative integer on error. - */ -static int repost_return(struct uiscmdrsp *cmdrsp, - struct visornic_devdata *devdata, - struct sk_buff *skb, struct net_device *netdev) -{ - struct net_pkt_rcv copy; - int i = 0, cc, numreposted; - int found_skb = 0; - int status = 0; - - copy = cmdrsp->net.rcv; - switch (copy.numrcvbufs) { - case 0: - devdata->n_rcv0++; - break; - case 1: - devdata->n_rcv1++; - break; - case 2: - devdata->n_rcv2++; - break; - default: - devdata->n_rcvx++; - break; - } - for (cc = 0, numreposted = 0; cc < copy.numrcvbufs; cc++) { - for (i = 0; i < devdata->num_rcv_bufs; i++) { - if (devdata->rcvbuf[i] != copy.rcvbuf[cc]) - continue; - - if ((skb) && devdata->rcvbuf[i] == skb) { - devdata->found_repost_rcvbuf_cnt++; - found_skb = 1; - devdata->repost_found_skb_cnt++; - } - devdata->rcvbuf[i] = alloc_rcv_buf(netdev); - if (!devdata->rcvbuf[i]) { - devdata->num_rcv_bufs_could_not_alloc++; - devdata->alloc_failed_in_repost_rtn_cnt++; - status = -ENOMEM; - break; - } - status = post_skb(cmdrsp, devdata, devdata->rcvbuf[i]); - if (status) { - kfree_skb(devdata->rcvbuf[i]); - devdata->rcvbuf[i] = NULL; - break; - } - numreposted++; - break; - } - } - if (numreposted != copy.numrcvbufs) { - devdata->n_repost_deficit++; - status = -EINVAL; - } - if (skb) { - if (found_skb) { - kfree_skb(skb); - } else { - status = -EINVAL; - devdata->bad_rcv_buf++; - } - } - return status; -} - -/* visornic_rx - handle receive packets coming back from IO Partition - * @cmdrsp: Receive packet returned from IO Partition. - * - * Got a receive packet back from the IO Partition; handle it and send it up - * the stack. - - * Return: 1 iff an skb was received, otherwise 0. - */ -static int visornic_rx(struct uiscmdrsp *cmdrsp) -{ - struct visornic_devdata *devdata; - struct sk_buff *skb, *prev, *curr; - struct net_device *netdev; - int cc, currsize, off; - struct ethhdr *eth; - unsigned long flags; - - /* post new rcv buf to the other end using the cmdrsp we have at hand - * post it without holding lock - but we'll use the signal lock to - * synchronize the queue insert the cmdrsp that contains the net.rcv - * is the one we are using to repost, so copy the info we need from it. - */ - skb = cmdrsp->net.buf; - netdev = skb->dev; - - devdata = netdev_priv(netdev); - - spin_lock_irqsave(&devdata->priv_lock, flags); - atomic_dec(&devdata->num_rcvbuf_in_iovm); - - /* set length to how much was ACTUALLY received - - * NOTE: rcv_done_len includes actual length of data rcvd - * including ethhdr - */ - skb->len = cmdrsp->net.rcv.rcv_done_len; - - /* update rcv stats - call it with priv_lock held */ - devdata->net_stats.rx_packets++; - devdata->net_stats.rx_bytes += skb->len; - - /* test enabled while holding lock */ - if (!(devdata->enabled && devdata->enab_dis_acked)) { - /* don't process it unless we're in enable mode and until - * we've gotten an ACK saying the other end got our RCV enable - */ - spin_unlock_irqrestore(&devdata->priv_lock, flags); - repost_return(cmdrsp, devdata, skb, netdev); - return 0; - } - - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - /* when skb was allocated, skb->dev, skb->data, skb->len and - * skb->data_len were setup. AND, data has already put into the - * skb (both first frag and in frags pages) - * NOTE: firstfragslen is the amount of data in skb->data and that - * which is not in nr_frags or frag_list. This is now simply - * RCVPOST_BUF_SIZE. bump tail to show how much data is in - * firstfrag & set data_len to show rest see if we have to chain - * frag_list. - */ - /* do PRECAUTIONARY check */ - if (skb->len > RCVPOST_BUF_SIZE) { - if (cmdrsp->net.rcv.numrcvbufs < 2) { - if (repost_return(cmdrsp, devdata, skb, netdev) < 0) - dev_err(&devdata->netdev->dev, - "repost_return failed"); - return 0; - } - /* length rcvd is greater than firstfrag in this skb rcv buf */ - /* amount in skb->data */ - skb->tail += RCVPOST_BUF_SIZE; - /* amount that will be in frag_list */ - skb->data_len = skb->len - RCVPOST_BUF_SIZE; - } else { - /* data fits in this skb - no chaining - do - * PRECAUTIONARY check - */ - /* should be 1 */ - if (cmdrsp->net.rcv.numrcvbufs != 1) { - if (repost_return(cmdrsp, devdata, skb, netdev) < 0) - dev_err(&devdata->netdev->dev, - "repost_return failed"); - return 0; - } - skb->tail += skb->len; - /* nothing rcvd in frag_list */ - skb->data_len = 0; - } - off = skb_tail_pointer(skb) - skb->data; - - /* amount we bumped tail by in the head skb - * it is used to calculate the size of each chained skb below - * it is also used to index into bufline to continue the copy - * (for chansocktwopc) - * if necessary chain the rcv skbs together. - * NOTE: index 0 has the same as cmdrsp->net.rcv.skb; we need to - * chain the rest to that one. - * - do PRECAUTIONARY check - */ - if (cmdrsp->net.rcv.rcvbuf[0] != skb) { - if (repost_return(cmdrsp, devdata, skb, netdev) < 0) - dev_err(&devdata->netdev->dev, "repost_return failed"); - return 0; - } - - if (cmdrsp->net.rcv.numrcvbufs > 1) { - /* chain the various rcv buffers into the skb's frag_list. */ - /* Note: off was initialized above */ - for (cc = 1, prev = NULL; - cc < cmdrsp->net.rcv.numrcvbufs; cc++) { - curr = (struct sk_buff *)cmdrsp->net.rcv.rcvbuf[cc]; - curr->next = NULL; - /* start of list- set head */ - if (!prev) - skb_shinfo(skb)->frag_list = curr; - else - prev->next = curr; - prev = curr; - - /* should we set skb->len and skb->data_len for each - * buffer being chained??? can't hurt! - */ - currsize = min(skb->len - off, - (unsigned int)RCVPOST_BUF_SIZE); - curr->len = currsize; - curr->tail += currsize; - curr->data_len = 0; - off += currsize; - } - /* assert skb->len == off */ - if (skb->len != off) { - netdev_err(devdata->netdev, - "something wrong; skb->len:%d != off:%d\n", - skb->len, off); - } - } - - /* set up packet's protocol type using ethernet header - this - * sets up skb->pkt_type & it also PULLS out the eth header - */ - skb->protocol = eth_type_trans(skb, netdev); - eth = eth_hdr(skb); - skb->csum = 0; - skb->ip_summed = CHECKSUM_NONE; - - do { - /* accept all packets */ - if (netdev->flags & IFF_PROMISC) - break; - if (skb->pkt_type == PACKET_BROADCAST) { - /* accept all broadcast packets */ - if (netdev->flags & IFF_BROADCAST) - break; - } else if (skb->pkt_type == PACKET_MULTICAST) { - if ((netdev->flags & IFF_MULTICAST) && - (netdev_mc_count(netdev))) { - struct netdev_hw_addr *ha; - int found_mc = 0; - - /* only accept multicast packets that we can - * find in our multicast address list - */ - netdev_for_each_mc_addr(ha, netdev) { - if (ether_addr_equal(eth->h_dest, - ha->addr)) { - found_mc = 1; - break; - } - } - /* accept pkt, dest matches a multicast addr */ - if (found_mc) - break; - } - /* accept packet, h_dest must match vnic mac address */ - } else if (skb->pkt_type == PACKET_HOST) { - break; - } else if (skb->pkt_type == PACKET_OTHERHOST) { - /* something is not right */ - dev_err(&devdata->netdev->dev, - "**** FAILED to deliver rcv packet to OS; name:%s Dest:%pM VNIC:%pM\n", - netdev->name, eth->h_dest, netdev->dev_addr); - } - /* drop packet - don't forward it up to OS */ - devdata->n_rcv_packets_not_accepted++; - repost_return(cmdrsp, devdata, skb, netdev); - return 0; - } while (0); - - netif_receive_skb(skb); - /* netif_rx returns various values, but "in practice most drivers - * ignore the return value - */ - - skb = NULL; - /* whether the packet got dropped or handled, the skb is freed by - * kernel code, so we shouldn't free it. but we should repost a - * new rcv buffer. - */ - repost_return(cmdrsp, devdata, skb, netdev); - return 1; -} - -/* devdata_initialize - initialize devdata structure - * @devdata: visornic_devdata structure to initialize. - * @dev: visorbus_device it belongs to. - * - * Setup initial values for the visornic, based on channel and default values. - * - * Return: A pointer to the devdata structure. - */ -static struct visornic_devdata *devdata_initialize( - struct visornic_devdata *devdata, - struct visor_device *dev) -{ - devdata->dev = dev; - devdata->incarnation_id = get_jiffies_64(); - return devdata; -} - -/* devdata_release - free up references in devdata - * @devdata: Struct to clean up. - */ -static void devdata_release(struct visornic_devdata *devdata) -{ - kfree(devdata->rcvbuf); - kfree(devdata->cmdrsp_rcv); - kfree(devdata->xmit_cmdrsp); -} - -static const struct net_device_ops visornic_dev_ops = { - .ndo_open = visornic_open, - .ndo_stop = visornic_close, - .ndo_start_xmit = visornic_xmit, - .ndo_get_stats = visornic_get_stats, - .ndo_change_mtu = visornic_change_mtu, - .ndo_tx_timeout = visornic_xmit_timeout, - .ndo_set_rx_mode = visornic_set_multi, -}; - -/* DebugFS code */ -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset) -{ - ssize_t bytes_read = 0; - int str_pos = 0; - struct visornic_devdata *devdata; - struct net_device *dev; - char *vbuf; - - if (len > MAX_BUF) - len = MAX_BUF; - vbuf = kzalloc(len, GFP_KERNEL); - if (!vbuf) - return -ENOMEM; - - /* for each vnic channel dump out channel specific data */ - rcu_read_lock(); - for_each_netdev_rcu(current->nsproxy->net_ns, dev) { - /* Only consider netdevs that are visornic, and are open */ - if (dev->netdev_ops != &visornic_dev_ops || - (!netif_queue_stopped(dev))) - continue; - - devdata = netdev_priv(dev); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "netdev = %s (0x%p), MAC Addr %pM\n", - dev->name, - dev, - dev->dev_addr); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "VisorNic Dev Info = 0x%p\n", devdata); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " num_rcv_bufs = %d\n", - devdata->num_rcv_bufs); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " max_outstanding_next_xmits = %lu\n", - devdata->max_outstanding_net_xmits); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " upper_threshold_net_xmits = %lu\n", - devdata->upper_threshold_net_xmits); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " lower_threshold_net_xmits = %lu\n", - devdata->lower_threshold_net_xmits); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " queuefullmsg_logged = %d\n", - devdata->queuefullmsg_logged); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.got_rcv = %lu\n", - devdata->chstat.got_rcv); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.got_enbdisack = %lu\n", - devdata->chstat.got_enbdisack); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.got_xmit_done = %lu\n", - devdata->chstat.got_xmit_done); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.xmit_fail = %lu\n", - devdata->chstat.xmit_fail); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.sent_enbdis = %lu\n", - devdata->chstat.sent_enbdis); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.sent_promisc = %lu\n", - devdata->chstat.sent_promisc); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.sent_post = %lu\n", - devdata->chstat.sent_post); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.sent_post_failed = %lu\n", - devdata->chstat.sent_post_failed); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.sent_xmit = %lu\n", - devdata->chstat.sent_xmit); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.reject_count = %lu\n", - devdata->chstat.reject_count); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " chstat.extra_rcvbufs_sent = %lu\n", - devdata->chstat.extra_rcvbufs_sent); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " n_rcv0 = %lu\n", devdata->n_rcv0); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " n_rcv1 = %lu\n", devdata->n_rcv1); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " n_rcv2 = %lu\n", devdata->n_rcv2); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " n_rcvx = %lu\n", devdata->n_rcvx); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " num_rcvbuf_in_iovm = %d\n", - atomic_read(&devdata->num_rcvbuf_in_iovm)); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " alloc_failed_in_if_needed_cnt = %lu\n", - devdata->alloc_failed_in_if_needed_cnt); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " alloc_failed_in_repost_rtn_cnt = %lu\n", - devdata->alloc_failed_in_repost_rtn_cnt); - /* str_pos += scnprintf(vbuf + str_pos, len - str_pos, - * " inner_loop_limit_reached_cnt = %lu\n", - * devdata->inner_loop_limit_reached_cnt); - */ - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " found_repost_rcvbuf_cnt = %lu\n", - devdata->found_repost_rcvbuf_cnt); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " repost_found_skb_cnt = %lu\n", - devdata->repost_found_skb_cnt); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " n_repost_deficit = %lu\n", - devdata->n_repost_deficit); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " bad_rcv_buf = %lu\n", - devdata->bad_rcv_buf); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " n_rcv_packets_not_accepted = %lu\n", - devdata->n_rcv_packets_not_accepted); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " interrupts_rcvd = %llu\n", - devdata->interrupts_rcvd); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " interrupts_notme = %llu\n", - devdata->interrupts_notme); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " interrupts_disabled = %llu\n", - devdata->interrupts_disabled); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " busy_cnt = %llu\n", - devdata->busy_cnt); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " flow_control_upper_hits = %llu\n", - devdata->flow_control_upper_hits); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " flow_control_lower_hits = %llu\n", - devdata->flow_control_lower_hits); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " netif_queue = %s\n", - netif_queue_stopped(devdata->netdev) ? - "stopped" : "running"); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " xmits_outstanding = %lu\n", - devdata_xmits_outstanding(devdata)); - } - rcu_read_unlock(); - bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos); - kfree(vbuf); - return bytes_read; -} - -static struct dentry *visornic_debugfs_dir; -static const struct file_operations debugfs_info_fops = { - .read = info_debugfs_read, -}; - -/* send_rcv_posts_if_needed - send receive buffers to the IO Partition. - * @devdata: Visornic device. - */ -static void send_rcv_posts_if_needed(struct visornic_devdata *devdata) -{ - int i; - struct net_device *netdev; - struct uiscmdrsp *cmdrsp = devdata->cmdrsp_rcv; - int cur_num_rcv_bufs_to_alloc, rcv_bufs_allocated; - int err; - - /* don't do this until vnic is marked ready */ - if (!(devdata->enabled && devdata->enab_dis_acked)) - return; - - netdev = devdata->netdev; - rcv_bufs_allocated = 0; - /* this code is trying to prevent getting stuck here forever, - * but still retry it if you cant allocate them all this time. - */ - cur_num_rcv_bufs_to_alloc = devdata->num_rcv_bufs_could_not_alloc; - while (cur_num_rcv_bufs_to_alloc > 0) { - cur_num_rcv_bufs_to_alloc--; - for (i = 0; i < devdata->num_rcv_bufs; i++) { - if (devdata->rcvbuf[i]) - continue; - devdata->rcvbuf[i] = alloc_rcv_buf(netdev); - if (!devdata->rcvbuf[i]) { - devdata->alloc_failed_in_if_needed_cnt++; - break; - } - rcv_bufs_allocated++; - err = post_skb(cmdrsp, devdata, devdata->rcvbuf[i]); - if (err) { - kfree_skb(devdata->rcvbuf[i]); - devdata->rcvbuf[i] = NULL; - break; - } - devdata->chstat.extra_rcvbufs_sent++; - } - } - devdata->num_rcv_bufs_could_not_alloc -= rcv_bufs_allocated; -} - -/* drain_resp_queue - drains and ignores all messages from the resp queue - * @cmdrsp: IO channel command response message. - * @devdata: Visornic device to drain. - */ -static void drain_resp_queue(struct uiscmdrsp *cmdrsp, - struct visornic_devdata *devdata) -{ - while (!visorchannel_signalremove(devdata->dev->visorchannel, - IOCHAN_FROM_IOPART, - cmdrsp)) - ; -} - -/* service_resp_queue - drain the response queue - * @cmdrsp: IO channel command response message. - * @devdata: Visornic device to drain. - * @rx_work_done: - * @budget: - * - * Drain the response queue of any responses from the IO Partition. Process the - * responses as we get them. - */ -static void service_resp_queue(struct uiscmdrsp *cmdrsp, - struct visornic_devdata *devdata, - int *rx_work_done, int budget) -{ - unsigned long flags; - struct net_device *netdev; - - while (*rx_work_done < budget) { - /* TODO: CLIENT ACQUIRE -- Don't really need this at the - * moment - */ - /* queue empty */ - if (visorchannel_signalremove(devdata->dev->visorchannel, - IOCHAN_FROM_IOPART, - cmdrsp)) - break; - - switch (cmdrsp->net.type) { - case NET_RCV: - devdata->chstat.got_rcv++; - /* process incoming packet */ - *rx_work_done += visornic_rx(cmdrsp); - break; - case NET_XMIT_DONE: - spin_lock_irqsave(&devdata->priv_lock, flags); - devdata->chstat.got_xmit_done++; - if (cmdrsp->net.xmtdone.xmt_done_result) - devdata->chstat.xmit_fail++; - /* only call queue wake if we stopped it */ - netdev = ((struct sk_buff *)cmdrsp->net.buf)->dev; - /* ASSERT netdev == vnicinfo->netdev; */ - if (netdev == devdata->netdev && - netif_queue_stopped(netdev)) { - /* check if we have crossed the lower watermark - * for netif_wake_queue() - */ - if (vnic_hit_low_watermark - (devdata, - devdata->lower_threshold_net_xmits)) { - /* enough NET_XMITs completed - * so can restart netif queue - */ - netif_wake_queue(netdev); - devdata->flow_control_lower_hits++; - } - } - skb_unlink(cmdrsp->net.buf, &devdata->xmitbufhead); - spin_unlock_irqrestore(&devdata->priv_lock, flags); - kfree_skb(cmdrsp->net.buf); - break; - case NET_RCV_ENBDIS_ACK: - devdata->chstat.got_enbdisack++; - netdev = (struct net_device *) - cmdrsp->net.enbdis.context; - spin_lock_irqsave(&devdata->priv_lock, flags); - devdata->enab_dis_acked = 1; - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - if (devdata->server_down && - devdata->server_change_state) { - /* Inform Linux that the link is up */ - devdata->server_down = false; - devdata->server_change_state = false; - netif_wake_queue(netdev); - netif_carrier_on(netdev); - } - break; - case NET_CONNECT_STATUS: - netdev = devdata->netdev; - if (cmdrsp->net.enbdis.enable == 1) { - spin_lock_irqsave(&devdata->priv_lock, flags); - devdata->enabled = cmdrsp->net.enbdis.enable; - spin_unlock_irqrestore(&devdata->priv_lock, - flags); - netif_wake_queue(netdev); - netif_carrier_on(netdev); - } else { - netif_stop_queue(netdev); - netif_carrier_off(netdev); - spin_lock_irqsave(&devdata->priv_lock, flags); - devdata->enabled = cmdrsp->net.enbdis.enable; - spin_unlock_irqrestore(&devdata->priv_lock, - flags); - } - break; - default: - break; - } - /* cmdrsp is now available for reuse */ - } -} - -static int visornic_poll(struct napi_struct *napi, int budget) -{ - struct visornic_devdata *devdata = container_of(napi, - struct visornic_devdata, - napi); - int rx_count = 0; - - send_rcv_posts_if_needed(devdata); - service_resp_queue(devdata->cmdrsp, devdata, &rx_count, budget); - - /* If there aren't any more packets to receive stop the poll */ - if (rx_count < budget) - napi_complete_done(napi, rx_count); - - return rx_count; -} - -/* visornic_channel_interrupt - checks the status of the response queue - * - * Main function of the vnic_incoming thread. Periodically check the response - * queue and drain it if needed. - */ -static void visornic_channel_interrupt(struct visor_device *dev) -{ - struct visornic_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) - return; - - if (!visorchannel_signalempty( - devdata->dev->visorchannel, - IOCHAN_FROM_IOPART)) - napi_schedule(&devdata->napi); - - atomic_set(&devdata->interrupt_rcvd, 0); - -} - -/* visornic_probe - probe function for visornic devices - * @dev: The visor device discovered. - * - * Called when visorbus discovers a visornic device on its bus. It creates a new - * visornic ethernet adapter. - * - * Return: 0 on success, or negative integer on error. - */ -static int visornic_probe(struct visor_device *dev) -{ - struct visornic_devdata *devdata = NULL; - struct net_device *netdev = NULL; - int err; - int channel_offset = 0; - u8 addr[ETH_ALEN]; - u64 features; - - netdev = alloc_etherdev(sizeof(struct visornic_devdata)); - if (!netdev) { - dev_err(&dev->device, - "%s alloc_etherdev failed\n", __func__); - return -ENOMEM; - } - - netdev->netdev_ops = &visornic_dev_ops; - netdev->watchdog_timeo = 5 * HZ; - SET_NETDEV_DEV(netdev, &dev->device); - - /* Get MAC address from channel and read it into the device. */ - netdev->addr_len = ETH_ALEN; - channel_offset = offsetof(struct visor_io_channel, vnic.macaddr); - err = visorbus_read_channel(dev, channel_offset, addr, ETH_ALEN); - if (err < 0) { - dev_err(&dev->device, - "%s failed to get mac addr from chan (%d)\n", - __func__, err); - goto cleanup_netdev; - } - eth_hw_addr_set(netdev, addr); - - devdata = devdata_initialize(netdev_priv(netdev), dev); - if (!devdata) { - dev_err(&dev->device, - "%s devdata_initialize failed\n", __func__); - err = -ENOMEM; - goto cleanup_netdev; - } - /* don't trust messages laying around in the channel */ - drain_resp_queue(devdata->cmdrsp, devdata); - - devdata->netdev = netdev; - dev_set_drvdata(&dev->device, devdata); - init_waitqueue_head(&devdata->rsp_queue); - spin_lock_init(&devdata->priv_lock); - /* not yet */ - devdata->enabled = 0; - atomic_set(&devdata->usage, 1); - - /* Setup rcv bufs */ - channel_offset = offsetof(struct visor_io_channel, vnic.num_rcv_bufs); - err = visorbus_read_channel(dev, channel_offset, - &devdata->num_rcv_bufs, 4); - if (err) { - dev_err(&dev->device, - "%s failed to get #rcv bufs from chan (%d)\n", - __func__, err); - goto cleanup_netdev; - } - - devdata->rcvbuf = kcalloc(devdata->num_rcv_bufs, - sizeof(struct sk_buff *), GFP_KERNEL); - if (!devdata->rcvbuf) { - err = -ENOMEM; - goto cleanup_netdev; - } - - /* set the net_xmit outstanding threshold - * always leave two slots open but you should have 3 at a minimum - * note that max_outstanding_net_xmits must be > 0 - */ - devdata->max_outstanding_net_xmits = - max_t(unsigned long, 3, ((devdata->num_rcv_bufs / 3) - 2)); - devdata->upper_threshold_net_xmits = - max_t(unsigned long, - 2, (devdata->max_outstanding_net_xmits - 1)); - devdata->lower_threshold_net_xmits = - max_t(unsigned long, - 1, (devdata->max_outstanding_net_xmits / 2)); - - skb_queue_head_init(&devdata->xmitbufhead); - - /* create a cmdrsp we can use to post and unpost rcv buffers */ - devdata->cmdrsp_rcv = kmalloc(SIZEOF_CMDRSP, GFP_KERNEL); - if (!devdata->cmdrsp_rcv) { - err = -ENOMEM; - goto cleanup_rcvbuf; - } - devdata->xmit_cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_KERNEL); - if (!devdata->xmit_cmdrsp) { - err = -ENOMEM; - goto cleanup_cmdrsp_rcv; - } - INIT_WORK(&devdata->timeout_reset, visornic_timeout_reset); - devdata->server_down = false; - devdata->server_change_state = false; - - /*set the default mtu */ - channel_offset = offsetof(struct visor_io_channel, vnic.mtu); - err = visorbus_read_channel(dev, channel_offset, &netdev->mtu, 4); - if (err) { - dev_err(&dev->device, - "%s failed to get mtu from chan (%d)\n", - __func__, err); - goto cleanup_xmit_cmdrsp; - } - - /* TODO: Setup Interrupt information */ - /* Let's start our threads to get responses */ - netif_napi_add(netdev, &devdata->napi, visornic_poll, NAPI_WEIGHT); - - channel_offset = offsetof(struct visor_io_channel, - channel_header.features); - err = visorbus_read_channel(dev, channel_offset, &features, 8); - if (err) { - dev_err(&dev->device, - "%s failed to get features from chan (%d)\n", - __func__, err); - goto cleanup_napi_add; - } - - features |= VISOR_CHANNEL_IS_POLLING; - features |= VISOR_DRIVER_ENHANCED_RCVBUF_CHECKING; - err = visorbus_write_channel(dev, channel_offset, &features, 8); - if (err) { - dev_err(&dev->device, - "%s failed to set features in chan (%d)\n", - __func__, err); - goto cleanup_napi_add; - } - - /* Note: Interrupts have to be enable before the while - * loop below because the napi routine is responsible for - * setting enab_dis_acked - */ - visorbus_enable_channel_interrupts(dev); - - err = register_netdev(netdev); - if (err) { - dev_err(&dev->device, - "%s register_netdev failed (%d)\n", __func__, err); - goto cleanup_napi_add; - } - - /* create debug/sysfs directories */ - devdata->eth_debugfs_dir = debugfs_create_dir(netdev->name, - visornic_debugfs_dir); - if (!devdata->eth_debugfs_dir) { - dev_err(&dev->device, - "%s debugfs_create_dir %s failed\n", - __func__, netdev->name); - err = -ENOMEM; - goto cleanup_register_netdev; - } - - dev_info(&dev->device, "%s success netdev=%s\n", - __func__, netdev->name); - return 0; - -cleanup_register_netdev: - unregister_netdev(netdev); - -cleanup_napi_add: - visorbus_disable_channel_interrupts(dev); - netif_napi_del(&devdata->napi); - -cleanup_xmit_cmdrsp: - kfree(devdata->xmit_cmdrsp); - -cleanup_cmdrsp_rcv: - kfree(devdata->cmdrsp_rcv); - -cleanup_rcvbuf: - kfree(devdata->rcvbuf); - -cleanup_netdev: - free_netdev(netdev); - return err; -} - -/* host_side_disappeared - IO Partition is gone - * @devdata: Device object. - * - * IO partition servicing this device is gone; do cleanup. - */ -static void host_side_disappeared(struct visornic_devdata *devdata) -{ - unsigned long flags; - - spin_lock_irqsave(&devdata->priv_lock, flags); - /* indicate device destroyed */ - devdata->dev = NULL; - spin_unlock_irqrestore(&devdata->priv_lock, flags); -} - -/* visornic_remove - called when visornic dev goes away - * @dev: Visornic device that is being removed. - * - * Called when DEVICE_DESTROY gets called to remove device. - */ -static void visornic_remove(struct visor_device *dev) -{ - struct visornic_devdata *devdata = dev_get_drvdata(&dev->device); - struct net_device *netdev; - unsigned long flags; - - if (!devdata) { - dev_err(&dev->device, "%s no devdata\n", __func__); - return; - } - spin_lock_irqsave(&devdata->priv_lock, flags); - if (devdata->going_away) { - spin_unlock_irqrestore(&devdata->priv_lock, flags); - dev_err(&dev->device, "%s already being removed\n", __func__); - return; - } - devdata->going_away = true; - spin_unlock_irqrestore(&devdata->priv_lock, flags); - netdev = devdata->netdev; - if (!netdev) { - dev_err(&dev->device, "%s not net device\n", __func__); - return; - } - - /* going_away prevents new items being added to the workqueues */ - cancel_work_sync(&devdata->timeout_reset); - - debugfs_remove_recursive(devdata->eth_debugfs_dir); - /* this will call visornic_close() */ - unregister_netdev(netdev); - - visorbus_disable_channel_interrupts(devdata->dev); - netif_napi_del(&devdata->napi); - - dev_set_drvdata(&dev->device, NULL); - host_side_disappeared(devdata); - devdata_release(devdata); - free_netdev(netdev); -} - -/* visornic_pause - called when IO Part disappears - * @dev: Visornic device that is being serviced. - * @complete_func: Call when finished. - * - * Called when the IO Partition has gone down. Need to free up resources and - * wait for IO partition to come back. Mark link as down and don't attempt any - * DMA. When we have freed memory, call the complete_func so that Command knows - * we are done. If we don't call complete_func, the IO Partition will never - * come back. - * - * Return: 0 on success. - */ -static int visornic_pause(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - struct visornic_devdata *devdata = dev_get_drvdata(&dev->device); - - visornic_serverdown(devdata, complete_func); - return 0; -} - -/* visornic_resume - called when IO Partition has recovered - * @dev: Visornic device that is being serviced. - * @compelte_func: Call when finished. - * - * Called when the IO partition has recovered. Re-establish connection to the IO - * Partition and set the link up. Okay to do DMA again. - * - * Returns 0 for success, negative integer on error. - */ -static int visornic_resume(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - struct visornic_devdata *devdata; - struct net_device *netdev; - unsigned long flags; - - devdata = dev_get_drvdata(&dev->device); - if (!devdata) { - dev_err(&dev->device, "%s no devdata\n", __func__); - return -EINVAL; - } - - netdev = devdata->netdev; - - spin_lock_irqsave(&devdata->priv_lock, flags); - if (devdata->server_change_state) { - spin_unlock_irqrestore(&devdata->priv_lock, flags); - dev_err(&dev->device, "%s server already changing state\n", - __func__); - return -EINVAL; - } - if (!devdata->server_down) { - spin_unlock_irqrestore(&devdata->priv_lock, flags); - dev_err(&dev->device, "%s server not down\n", __func__); - complete_func(dev, 0); - return 0; - } - devdata->server_change_state = true; - spin_unlock_irqrestore(&devdata->priv_lock, flags); - - /* Must transition channel to ATTACHED state BEFORE - * we can start using the device again. - * TODO: State transitions - */ - visorbus_enable_channel_interrupts(dev); - - rtnl_lock(); - dev_open(netdev, NULL); - rtnl_unlock(); - - complete_func(dev, 0); - return 0; -} - -/* This is used to tell the visorbus driver which types of visor devices - * we support, and what functions to call when a visor device that we support - * is attached or removed. - */ -static struct visor_driver visornic_driver = { - .name = "visornic", - .owner = THIS_MODULE, - .channel_types = visornic_channel_types, - .probe = visornic_probe, - .remove = visornic_remove, - .pause = visornic_pause, - .resume = visornic_resume, - .channel_interrupt = visornic_channel_interrupt, -}; - -/* visornic_init - init function - * - * Init function for the visornic driver. Do initial driver setup and wait - * for devices. - * - * Return: 0 on success, negative integer on error. - */ -static int visornic_init(void) -{ - int err; - - visornic_debugfs_dir = debugfs_create_dir("visornic", NULL); - - debugfs_create_file("info", 0400, visornic_debugfs_dir, NULL, - &debugfs_info_fops); - debugfs_create_file("enable_ints", 0200, visornic_debugfs_dir, NULL, - &debugfs_enable_ints_fops); - - err = visorbus_register_visor_driver(&visornic_driver); - if (err) - debugfs_remove_recursive(visornic_debugfs_dir); - - return err; -} - -/* visornic_cleanup - driver exit routine - * - * Unregister driver from the bus and free up memory. - */ -static void visornic_cleanup(void) -{ - visorbus_unregister_visor_driver(&visornic_driver); - debugfs_remove_recursive(visornic_debugfs_dir); -} - -module_init(visornic_init); -module_exit(visornic_cleanup); - -MODULE_AUTHOR("Unisys"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("s-Par NIC driver for virtual network devices"); |