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linux-2.6/include/linux/wimax/i2400m.h
Inaky Perez-Gonzalez c747583d19 wimax/i2400m: implement RX reorder support 
Allow the device to give the driver RX data with reorder information.

When that is done, the device will indicate the driver if a packet has
to be held in a (sorted) queue. It will also tell the driver when held
packets have to be released to the OS.

This is done to improve the WiMAX-protocol level retransmission
support when missing frames are detected.

The code docs provide details about the implementation.

In general, this just hooks into the RX path in rx.c; if a packet with
the reorder bit in the RX header is detected, the reorder information
in the header is extracted and one of the four main reorder operations
are executed. In one case (queue) no packet will be delivered to the
networking stack, just queued, whereas in the others (reset, update_ws
and queue_update_ws), queued packet might be delivered depending on
the window start for the specific queue.

The modifications to files other than rx.c are:

- control.c: during device initialization, enable reordering support
  if the rx_reorder_disabled module parameter is not enabled

- driver.c: expose a rx_reorder_disable module parameter and call
  i2400m_rx_setup/release() to initialize/shutdown RX reorder
  support.

- i2400m.h: introduce members in 'struct i2400m' needed for
  implementing reorder support.

- linux/i2400m.h: introduce TLVs, commands and constant definitions
  related to RX reorder

Last but not least, the rx reorder code includes an small circular log
where the last N reorder operations are recorded to be displayed in
case of inconsistency. Otherwise diagnosing issues would be almost
impossible.

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-02 03:10:28 -08:00

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/*
* Intel Wireless WiMax Connection 2400m
* Host-Device protocol interface definitions
*
*
* Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* Intel Corporation <linux-wimax@intel.com>
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
* - Initial implementation
*
*
* This header defines the data structures and constants used to
* communicate with the device.
*
* BOOTMODE/BOOTROM/FIRMWARE UPLOAD PROTOCOL
*
* The firmware upload protocol is quite simple and only requires a
* handful of commands. See drivers/net/wimax/i2400m/fw.c for more
* details.
*
* The BCF data structure is for the firmware file header.
*
*
* THE DATA / CONTROL PROTOCOL
*
* This is the normal protocol spoken with the device once the
* firmware is uploaded. It transports data payloads and control
* messages back and forth.
*
* It consists 'messages' that pack one or more payloads each. The
* format is described in detail in drivers/net/wimax/i2400m/rx.c and
* tx.c.
*
*
* THE L3L4 PROTOCOL
*
* The term L3L4 refers to Layer 3 (the device), Layer 4 (the
* driver/host software).
*
* This is the control protocol used by the host to control the i2400m
* device (scan, connect, disconnect...). This is sent to / received
* as control frames. These frames consist of a header and zero or
* more TLVs with information. We call each control frame a "message".
*
* Each message is composed of:
*
* HEADER
* [TLV0 + PAYLOAD0]
* [TLV1 + PAYLOAD1]
* [...]
* [TLVN + PAYLOADN]
*
* The HEADER is defined by 'struct i2400m_l3l4_hdr'. The payloads are
* defined by a TLV structure (Type Length Value) which is a 'header'
* (struct i2400m_tlv_hdr) and then the payload.
*
* All integers are represented as Little Endian.
*
* - REQUESTS AND EVENTS
*
* The requests can be clasified as follows:
*
* COMMAND: implies a request from the host to the device requesting
* an action being performed. The device will reply with a
* message (with the same type as the command), status and
* no (TLV) payload. Execution of a command might cause
* events (of different type) to be sent later on as
* device's state changes.
*
* GET/SET: similar to COMMAND, but will not cause other
* EVENTs. The reply, in the case of GET, will contain
* TLVs with the requested information.
*
* EVENT: asynchronous messages sent from the device, maybe as a
* consequence of previous COMMANDs but disassociated from
* them.
*
* Only one request might be pending at the same time (ie: don't
* parallelize nor post another GET request before the previous
* COMMAND has been acknowledged with it's corresponding reply by the
* device).
*
* The different requests and their formats are described below:
*
* I2400M_MT_* Message types
* I2400M_MS_* Message status (for replies, events)
* i2400m_tlv_* TLVs
*
* data types are named 'struct i2400m_msg_OPNAME', OPNAME matching the
* operation.
*/
#ifndef __LINUX__WIMAX__I2400M_H__
#define __LINUX__WIMAX__I2400M_H__
#include <linux/types.h>
/*
* Host Device Interface (HDI) common to all busses
*/
/* Boot-mode (firmware upload mode) commands */
/* Header for the firmware file */
struct i2400m_bcf_hdr {
__le32 module_type;
__le32 header_len;
__le32 header_version;
__le32 module_id;
__le32 module_vendor;
__le32 date; /* BCD YYYMMDD */
__le32 size;
__le32 key_size; /* in dwords */
__le32 modulus_size; /* in dwords */
__le32 exponent_size; /* in dwords */
__u8 reserved[88];
} __attribute__ ((packed));
/* Boot mode opcodes */
enum i2400m_brh_opcode {
I2400M_BRH_READ = 1,
I2400M_BRH_WRITE = 2,
I2400M_BRH_JUMP = 3,
I2400M_BRH_SIGNED_JUMP = 8,
I2400M_BRH_HASH_PAYLOAD_ONLY = 9,
};
/* Boot mode command masks and stuff */
enum i2400m_brh {
I2400M_BRH_SIGNATURE = 0xcbbc0000,
I2400M_BRH_SIGNATURE_MASK = 0xffff0000,
I2400M_BRH_SIGNATURE_SHIFT = 16,
I2400M_BRH_OPCODE_MASK = 0x0000000f,
I2400M_BRH_RESPONSE_MASK = 0x000000f0,
I2400M_BRH_RESPONSE_SHIFT = 4,
I2400M_BRH_DIRECT_ACCESS = 0x00000400,
I2400M_BRH_RESPONSE_REQUIRED = 0x00000200,
I2400M_BRH_USE_CHECKSUM = 0x00000100,
};
/* Constants for bcf->module_id */
enum i2400m_bcf_mod_id {
/* Firmware file carries its own pokes -- pokes are a set of
* magical values that have to be written in certain memory
* addresses to get the device up and ready for firmware
* download when it is in non-signed boot mode. */
I2400M_BCF_MOD_ID_POKES = 0x000000001,
};
/**
* i2400m_bootrom_header - Header for a boot-mode command
*
* @cmd: the above command descriptor
* @target_addr: where on the device memory should the action be performed.
* @data_size: for read/write, amount of data to be read/written
* @block_checksum: checksum value (if applicable)
* @payload: the beginning of data attached to this header
*/
struct i2400m_bootrom_header {
__le32 command; /* Compose with enum i2400_brh */
__le32 target_addr;
__le32 data_size;
__le32 block_checksum;
char payload[0];
} __attribute__ ((packed));
/*
* Data / control protocol
*/
/* Packet types for the host-device interface */
enum i2400m_pt {
I2400M_PT_DATA = 0,
I2400M_PT_CTRL,
I2400M_PT_TRACE, /* For device debug */
I2400M_PT_RESET_WARM, /* device reset */
I2400M_PT_RESET_COLD, /* USB[transport] reset, like reconnect */
I2400M_PT_EDATA, /* Extended RX data */
I2400M_PT_ILLEGAL
};
/*
* Payload for a data packet
*
* This is prefixed to each and every outgoing DATA type.
*/
struct i2400m_pl_data_hdr {
__le32 reserved;
} __attribute__((packed));
/*
* Payload for an extended data packet
*
* New in fw v1.4
*
* @reorder: if this payload has to be reorder or not (and how)
* @cs: the type of data in the packet, as defined per (802.16e
* T11.13.19.1). Currently only 2 (IPv4 packet) supported.
*
* This is prefixed to each and every INCOMING DATA packet.
*/
struct i2400m_pl_edata_hdr {
__le32 reorder; /* bits defined in i2400m_ro */
__u8 cs;
__u8 reserved[11];
} __attribute__((packed));
enum i2400m_cs {
I2400M_CS_IPV4_0 = 0,
I2400M_CS_IPV4 = 2,
};
enum i2400m_ro {
I2400M_RO_NEEDED = 0x01,
I2400M_RO_TYPE = 0x03,
I2400M_RO_TYPE_SHIFT = 1,
I2400M_RO_CIN = 0x0f,
I2400M_RO_CIN_SHIFT = 4,
I2400M_RO_FBN = 0x07ff,
I2400M_RO_FBN_SHIFT = 8,
I2400M_RO_SN = 0x07ff,
I2400M_RO_SN_SHIFT = 21,
};
enum i2400m_ro_type {
I2400M_RO_TYPE_RESET = 0,
I2400M_RO_TYPE_PACKET,
I2400M_RO_TYPE_WS,
I2400M_RO_TYPE_PACKET_WS,
};
/* Misc constants */
enum {
I2400M_PL_PAD = 16, /* Payload data size alignment */
I2400M_PL_SIZE_MAX = 0x3EFF,
I2400M_MAX_PLS_IN_MSG = 60,
/* protocol barkers: sync sequences; for notifications they
* are sent in groups of four. */
I2400M_H2D_PREVIEW_BARKER = 0xcafe900d,
I2400M_COLD_RESET_BARKER = 0xc01dc01d,
I2400M_WARM_RESET_BARKER = 0x50f750f7,
I2400M_NBOOT_BARKER = 0xdeadbeef,
I2400M_SBOOT_BARKER = 0x0ff1c1a1,
I2400M_ACK_BARKER = 0xfeedbabe,
I2400M_D2H_MSG_BARKER = 0xbeefbabe,
};
/*
* Hardware payload descriptor
*
* Bitfields encoded in a struct to enforce typing semantics.
*
* Look in rx.c and tx.c for a full description of the format.
*/
struct i2400m_pld {
__le32 val;
} __attribute__ ((packed));
#define I2400M_PLD_SIZE_MASK 0x00003fff
#define I2400M_PLD_TYPE_SHIFT 16
#define I2400M_PLD_TYPE_MASK 0x000f0000
/*
* Header for a TX message or RX message
*
* @barker: preamble
* @size: used for management of the FIFO queue buffer; before
* sending, this is converted to be a real preamble. This
* indicates the real size of the TX message that starts at this
* point. If the highest bit is set, then this message is to be
* skipped.
* @sequence: sequence number of this message
* @offset: offset where the message itself starts -- see the comments
* in the file header about message header and payload descriptor
* alignment.
* @num_pls: number of payloads in this message
* @padding: amount of padding bytes at the end of the message to make
* it be of block-size aligned
*
* Look in rx.c and tx.c for a full description of the format.
*/
struct i2400m_msg_hdr {
union {
__le32 barker;
__u32 size; /* same size type as barker!! */
};
union {
__le32 sequence;
__u32 offset; /* same size type as barker!! */
};
__le16 num_pls;
__le16 rsv1;
__le16 padding;
__le16 rsv2;
struct i2400m_pld pld[0];
} __attribute__ ((packed));
/*
* L3/L4 control protocol
*/
enum {
/* Interface version */
I2400M_L3L4_VERSION = 0x0100,
};
/* Message types */
enum i2400m_mt {
I2400M_MT_RESERVED = 0x0000,
I2400M_MT_INVALID = 0xffff,
I2400M_MT_REPORT_MASK = 0x8000,
I2400M_MT_GET_SCAN_RESULT = 0x4202,
I2400M_MT_SET_SCAN_PARAM = 0x4402,
I2400M_MT_CMD_RF_CONTROL = 0x4602,
I2400M_MT_CMD_SCAN = 0x4603,
I2400M_MT_CMD_CONNECT = 0x4604,
I2400M_MT_CMD_DISCONNECT = 0x4605,
I2400M_MT_CMD_EXIT_IDLE = 0x4606,
I2400M_MT_GET_LM_VERSION = 0x5201,
I2400M_MT_GET_DEVICE_INFO = 0x5202,
I2400M_MT_GET_LINK_STATUS = 0x5203,
I2400M_MT_GET_STATISTICS = 0x5204,
I2400M_MT_GET_STATE = 0x5205,
I2400M_MT_GET_MEDIA_STATUS = 0x5206,
I2400M_MT_SET_INIT_CONFIG = 0x5404,
I2400M_MT_CMD_INIT = 0x5601,
I2400M_MT_CMD_TERMINATE = 0x5602,
I2400M_MT_CMD_MODE_OF_OP = 0x5603,
I2400M_MT_CMD_RESET_DEVICE = 0x5604,
I2400M_MT_CMD_MONITOR_CONTROL = 0x5605,
I2400M_MT_CMD_ENTER_POWERSAVE = 0x5606,
I2400M_MT_GET_TLS_OPERATION_RESULT = 0x6201,
I2400M_MT_SET_EAP_SUCCESS = 0x6402,
I2400M_MT_SET_EAP_FAIL = 0x6403,
I2400M_MT_SET_EAP_KEY = 0x6404,
I2400M_MT_CMD_SEND_EAP_RESPONSE = 0x6602,
I2400M_MT_REPORT_SCAN_RESULT = 0xc002,
I2400M_MT_REPORT_STATE = 0xd002,
I2400M_MT_REPORT_POWERSAVE_READY = 0xd005,
I2400M_MT_REPORT_EAP_REQUEST = 0xe002,
I2400M_MT_REPORT_EAP_RESTART = 0xe003,
I2400M_MT_REPORT_ALT_ACCEPT = 0xe004,
I2400M_MT_REPORT_KEY_REQUEST = 0xe005,
};
/*
* Message Ack Status codes
*
* When a message is replied-to, this status is reported.
*/
enum i2400m_ms {
I2400M_MS_DONE_OK = 0,
I2400M_MS_DONE_IN_PROGRESS = 1,
I2400M_MS_INVALID_OP = 2,
I2400M_MS_BAD_STATE = 3,
I2400M_MS_ILLEGAL_VALUE = 4,
I2400M_MS_MISSING_PARAMS = 5,
I2400M_MS_VERSION_ERROR = 6,
I2400M_MS_ACCESSIBILITY_ERROR = 7,
I2400M_MS_BUSY = 8,
I2400M_MS_CORRUPTED_TLV = 9,
I2400M_MS_UNINITIALIZED = 10,
I2400M_MS_UNKNOWN_ERROR = 11,
I2400M_MS_PRODUCTION_ERROR = 12,
I2400M_MS_NO_RF = 13,
I2400M_MS_NOT_READY_FOR_POWERSAVE = 14,
I2400M_MS_THERMAL_CRITICAL = 15,
I2400M_MS_MAX
};
/**
* i2400m_tlv - enumeration of the different types of TLVs
*
* TLVs stand for type-length-value and are the header for a payload
* composed of almost anything. Each payload has a type assigned
* and a length.
*/
enum i2400m_tlv {
I2400M_TLV_L4_MESSAGE_VERSIONS = 129,
I2400M_TLV_SYSTEM_STATE = 141,
I2400M_TLV_MEDIA_STATUS = 161,
I2400M_TLV_RF_OPERATION = 162,
I2400M_TLV_RF_STATUS = 163,
I2400M_TLV_DEVICE_RESET_TYPE = 132,
I2400M_TLV_CONFIG_IDLE_PARAMETERS = 601,
I2400M_TLV_CONFIG_IDLE_TIMEOUT = 611,
I2400M_TLV_CONFIG_D2H_DATA_FORMAT = 614,
I2400M_TLV_CONFIG_DL_HOST_REORDER = 615,
};
struct i2400m_tlv_hdr {
__le16 type;
__le16 length; /* payload's */
__u8 pl[0];
} __attribute__((packed));
struct i2400m_l3l4_hdr {
__le16 type;
__le16 length; /* payload's */
__le16 version;
__le16 resv1;
__le16 status;
__le16 resv2;
struct i2400m_tlv_hdr pl[0];
} __attribute__((packed));
/**
* i2400m_system_state - different states of the device
*/
enum i2400m_system_state {
I2400M_SS_UNINITIALIZED = 1,
I2400M_SS_INIT,
I2400M_SS_READY,
I2400M_SS_SCAN,
I2400M_SS_STANDBY,
I2400M_SS_CONNECTING,
I2400M_SS_WIMAX_CONNECTED,
I2400M_SS_DATA_PATH_CONNECTED,
I2400M_SS_IDLE,
I2400M_SS_DISCONNECTING,
I2400M_SS_OUT_OF_ZONE,
I2400M_SS_SLEEPACTIVE,
I2400M_SS_PRODUCTION,
I2400M_SS_CONFIG,
I2400M_SS_RF_OFF,
I2400M_SS_RF_SHUTDOWN,
I2400M_SS_DEVICE_DISCONNECT,
I2400M_SS_MAX,
};
/**
* i2400m_tlv_system_state - report on the state of the system
*
* @state: see enum i2400m_system_state
*/
struct i2400m_tlv_system_state {
struct i2400m_tlv_hdr hdr;
__le32 state;
} __attribute__((packed));
struct i2400m_tlv_l4_message_versions {
struct i2400m_tlv_hdr hdr;
__le16 major;
__le16 minor;
__le16 branch;
__le16 reserved;
} __attribute__((packed));
struct i2400m_tlv_detailed_device_info {
struct i2400m_tlv_hdr hdr;
__u8 reserved1[400];
__u8 mac_address[6];
__u8 reserved2[2];
} __attribute__((packed));
enum i2400m_rf_switch_status {
I2400M_RF_SWITCH_ON = 1,
I2400M_RF_SWITCH_OFF = 2,
};
struct i2400m_tlv_rf_switches_status {
struct i2400m_tlv_hdr hdr;
__u8 sw_rf_switch; /* 1 ON, 2 OFF */
__u8 hw_rf_switch; /* 1 ON, 2 OFF */
__u8 reserved[2];
} __attribute__((packed));
enum {
i2400m_rf_operation_on = 1,
i2400m_rf_operation_off = 2
};
struct i2400m_tlv_rf_operation {
struct i2400m_tlv_hdr hdr;
__le32 status; /* 1 ON, 2 OFF */
} __attribute__((packed));
enum i2400m_tlv_reset_type {
I2400M_RESET_TYPE_COLD = 1,
I2400M_RESET_TYPE_WARM
};
struct i2400m_tlv_device_reset_type {
struct i2400m_tlv_hdr hdr;
__le32 reset_type;
} __attribute__((packed));
struct i2400m_tlv_config_idle_parameters {
struct i2400m_tlv_hdr hdr;
__le32 idle_timeout; /* 100 to 300000 ms [5min], 100 increments
* 0 disabled */
__le32 idle_paging_interval; /* frames */
} __attribute__((packed));
enum i2400m_media_status {
I2400M_MEDIA_STATUS_LINK_UP = 1,
I2400M_MEDIA_STATUS_LINK_DOWN,
I2400M_MEDIA_STATUS_LINK_RENEW,
};
struct i2400m_tlv_media_status {
struct i2400m_tlv_hdr hdr;
__le32 media_status;
} __attribute__((packed));
/* New in v1.4 */
struct i2400m_tlv_config_idle_timeout {
struct i2400m_tlv_hdr hdr;
__le32 timeout; /* 100 to 300000 ms [5min], 100 increments
* 0 disabled */
} __attribute__((packed));
/* New in v1.4 -- for backward compat, will be removed */
struct i2400m_tlv_config_d2h_data_format {
struct i2400m_tlv_hdr hdr;
__u8 format; /* 0 old format, 1 enhanced */
__u8 reserved[3];
} __attribute__((packed));
/* New in v1.4 */
struct i2400m_tlv_config_dl_host_reorder {
struct i2400m_tlv_hdr hdr;
__u8 reorder; /* 0 disabled, 1 enabled */
__u8 reserved[3];
} __attribute__((packed));
#endif /* #ifndef __LINUX__WIMAX__I2400M_H__ */
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