974 lines
34 KiB
C
974 lines
34 KiB
C
/*
|
|
* Intel Wireless WiMAX Connection 2400m
|
|
* Declarations for bus-generic internal APIs
|
|
*
|
|
*
|
|
* 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>
|
|
* Yanir Lubetkin <yanirx.lubetkin@intel.com>
|
|
* - Initial implementation
|
|
*
|
|
*
|
|
* GENERAL DRIVER ARCHITECTURE
|
|
*
|
|
* The i2400m driver is split in the following two major parts:
|
|
*
|
|
* - bus specific driver
|
|
* - bus generic driver (this part)
|
|
*
|
|
* The bus specific driver sets up stuff specific to the bus the
|
|
* device is connected to (USB, PCI, tam-tam...non-authoritative
|
|
* nor binding list) which is basically the device-model management
|
|
* (probe/disconnect, etc), moving data from device to kernel and
|
|
* back, doing the power saving details and reseting the device.
|
|
*
|
|
* For details on each bus-specific driver, see it's include file,
|
|
* i2400m-BUSNAME.h
|
|
*
|
|
* The bus-generic functionality break up is:
|
|
*
|
|
* - Firmware upload: fw.c - takes care of uploading firmware to the
|
|
* device. bus-specific driver just needs to provides a way to
|
|
* execute boot-mode commands and to reset the device.
|
|
*
|
|
* - RX handling: rx.c - receives data from the bus-specific code and
|
|
* feeds it to the network or WiMAX stack or uses it to modify
|
|
* the driver state. bus-specific driver only has to receive
|
|
* frames and pass them to this module.
|
|
*
|
|
* - TX handling: tx.c - manages the TX FIFO queue and provides means
|
|
* for the bus-specific TX code to pull data from the FIFO
|
|
* queue. bus-specific code just pulls frames from this module
|
|
* to sends them to the device.
|
|
*
|
|
* - netdev glue: netdev.c - interface with Linux networking
|
|
* stack. Pass around data frames, and configure when the
|
|
* device is up and running or shutdown (through ifconfig up /
|
|
* down). Bus-generic only.
|
|
*
|
|
* - control ops: control.c - implements various commands for
|
|
* controlling the device. bus-generic only.
|
|
*
|
|
* - device model glue: driver.c - implements helpers for the
|
|
* device-model glue done by the bus-specific layer
|
|
* (setup/release the driver resources), turning the device on
|
|
* and off, handling the device reboots/resets and a few simple
|
|
* WiMAX stack ops.
|
|
*
|
|
* Code is also broken up in linux-glue / device-glue.
|
|
*
|
|
* Linux glue contains functions that deal mostly with gluing with the
|
|
* rest of the Linux kernel.
|
|
*
|
|
* Device-glue are functions that deal mostly with the way the device
|
|
* does things and talk the device's language.
|
|
*
|
|
* device-glue code is licensed BSD so other open source OSes can take
|
|
* it to implement their drivers.
|
|
*
|
|
*
|
|
* APIs AND HEADER FILES
|
|
*
|
|
* This bus generic code exports three APIs:
|
|
*
|
|
* - HDI (host-device interface) definitions common to all busses
|
|
* (include/linux/wimax/i2400m.h); these can be also used by user
|
|
* space code.
|
|
* - internal API for the bus-generic code
|
|
* - external API for the bus-specific drivers
|
|
*
|
|
*
|
|
* LIFE CYCLE:
|
|
*
|
|
* When the bus-specific driver probes, it allocates a network device
|
|
* with enough space for it's data structue, that must contain a
|
|
* &struct i2400m at the top.
|
|
*
|
|
* On probe, it needs to fill the i2400m members marked as [fill], as
|
|
* well as i2400m->wimax_dev.net_dev and call i2400m_setup(). The
|
|
* i2400m driver will only register with the WiMAX and network stacks;
|
|
* the only access done to the device is to read the MAC address so we
|
|
* can register a network device.
|
|
*
|
|
* The high-level call flow is:
|
|
*
|
|
* bus_probe()
|
|
* i2400m_setup()
|
|
* i2400m->bus_setup()
|
|
* boot rom initialization / read mac addr
|
|
* network / WiMAX stacks registration
|
|
* i2400m_dev_start()
|
|
* i2400m->bus_dev_start()
|
|
* i2400m_dev_initialize()
|
|
*
|
|
* The reverse applies for a disconnect() call:
|
|
*
|
|
* bus_disconnect()
|
|
* i2400m_release()
|
|
* i2400m_dev_stop()
|
|
* i2400m_dev_shutdown()
|
|
* i2400m->bus_dev_stop()
|
|
* network / WiMAX stack unregistration
|
|
* i2400m->bus_release()
|
|
*
|
|
* At this point, control and data communications are possible.
|
|
*
|
|
* While the device is up, it might reset. The bus-specific driver has
|
|
* to catch that situation and call i2400m_dev_reset_handle() to deal
|
|
* with it (reset the internal driver structures and go back to square
|
|
* one).
|
|
*/
|
|
|
|
#ifndef __I2400M_H__
|
|
#define __I2400M_H__
|
|
|
|
#include <linux/usb.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/atomic.h>
|
|
#include <net/wimax.h>
|
|
#include <linux/wimax/i2400m.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
enum {
|
|
/* netdev interface */
|
|
/*
|
|
* Out of NWG spec (R1_v1.2.2), 3.3.3 ASN Bearer Plane MTU Size
|
|
*
|
|
* The MTU is 1400 or less
|
|
*/
|
|
I2400M_MAX_MTU = 1400,
|
|
};
|
|
|
|
/* Misc constants */
|
|
enum {
|
|
/* Size of the Boot Mode Command buffer */
|
|
I2400M_BM_CMD_BUF_SIZE = 16 * 1024,
|
|
I2400M_BM_ACK_BUF_SIZE = 256,
|
|
};
|
|
|
|
enum {
|
|
/* Maximum number of bus reset can be retried */
|
|
I2400M_BUS_RESET_RETRIES = 3,
|
|
};
|
|
|
|
/**
|
|
* struct i2400m_poke_table - Hardware poke table for the Intel 2400m
|
|
*
|
|
* This structure will be used to create a device specific poke table
|
|
* to put the device in a consistent state at boot time.
|
|
*
|
|
* @address: The device address to poke
|
|
*
|
|
* @data: The data value to poke to the device address
|
|
*
|
|
*/
|
|
struct i2400m_poke_table{
|
|
__le32 address;
|
|
__le32 data;
|
|
};
|
|
|
|
#define I2400M_FW_POKE(a, d) { \
|
|
.address = cpu_to_le32(a), \
|
|
.data = cpu_to_le32(d) \
|
|
}
|
|
|
|
|
|
/**
|
|
* i2400m_reset_type - methods to reset a device
|
|
*
|
|
* @I2400M_RT_WARM: Reset without device disconnection, device handles
|
|
* are kept valid but state is back to power on, with firmware
|
|
* re-uploaded.
|
|
* @I2400M_RT_COLD: Tell the device to disconnect itself from the bus
|
|
* and reconnect. Renders all device handles invalid.
|
|
* @I2400M_RT_BUS: Tells the bus to reset the device; last measure
|
|
* used when both types above don't work.
|
|
*/
|
|
enum i2400m_reset_type {
|
|
I2400M_RT_WARM, /* first measure */
|
|
I2400M_RT_COLD, /* second measure */
|
|
I2400M_RT_BUS, /* call in artillery */
|
|
};
|
|
|
|
struct i2400m_reset_ctx;
|
|
struct i2400m_roq;
|
|
struct i2400m_barker_db;
|
|
|
|
/**
|
|
* struct i2400m - descriptor for an Intel 2400m
|
|
*
|
|
* Members marked with [fill] must be filled out/initialized before
|
|
* calling i2400m_setup().
|
|
*
|
|
* Note the @bus_setup/@bus_release, @bus_dev_start/@bus_dev_release
|
|
* call pairs are very much doing almost the same, and depending on
|
|
* the underlying bus, some stuff has to be put in one or the
|
|
* other. The idea of setup/release is that they setup the minimal
|
|
* amount needed for loading firmware, where us dev_start/stop setup
|
|
* the rest needed to do full data/control traffic.
|
|
*
|
|
* @bus_tx_block_size: [fill] USB imposes a 16 block size, but other
|
|
* busses will differ. So we have a tx_blk_size variable that the
|
|
* bus layer sets to tell the engine how much of that we need.
|
|
*
|
|
* @bus_tx_room_min: [fill] Minimum room required while allocating
|
|
* TX queue's buffer space for message header. USB requires
|
|
* 16 bytes. Refer to bus specific driver code for details.
|
|
*
|
|
* @bus_pl_size_max: [fill] Maximum payload size.
|
|
*
|
|
* @bus_setup: [optional fill] Function called by the bus-generic code
|
|
* [i2400m_setup()] to setup the basic bus-specific communications
|
|
* to the the device needed to load firmware. See LIFE CYCLE above.
|
|
*
|
|
* NOTE: Doesn't need to upload the firmware, as that is taken
|
|
* care of by the bus-generic code.
|
|
*
|
|
* @bus_release: [optional fill] Function called by the bus-generic
|
|
* code [i2400m_release()] to shutdown the basic bus-specific
|
|
* communications to the the device needed to load firmware. See
|
|
* LIFE CYCLE above.
|
|
*
|
|
* This function does not need to reset the device, just tear down
|
|
* all the host resources created to handle communication with
|
|
* the device.
|
|
*
|
|
* @bus_dev_start: [optional fill] Function called by the bus-generic
|
|
* code [i2400m_dev_start()] to do things needed to start the
|
|
* device. See LIFE CYCLE above.
|
|
*
|
|
* NOTE: Doesn't need to upload the firmware, as that is taken
|
|
* care of by the bus-generic code.
|
|
*
|
|
* @bus_dev_stop: [optional fill] Function called by the bus-generic
|
|
* code [i2400m_dev_stop()] to do things needed for stopping the
|
|
* device. See LIFE CYCLE above.
|
|
*
|
|
* This function does not need to reset the device, just tear down
|
|
* all the host resources created to handle communication with
|
|
* the device.
|
|
*
|
|
* @bus_tx_kick: [fill] Function called by the bus-generic code to let
|
|
* the bus-specific code know that there is data available in the
|
|
* TX FIFO for transmission to the device.
|
|
*
|
|
* This function cannot sleep.
|
|
*
|
|
* @bus_reset: [fill] Function called by the bus-generic code to reset
|
|
* the device in in various ways. Doesn't need to wait for the
|
|
* reset to finish.
|
|
*
|
|
* If warm or cold reset fail, this function is expected to do a
|
|
* bus-specific reset (eg: USB reset) to get the device to a
|
|
* working state (even if it implies device disconecction).
|
|
*
|
|
* Note the warm reset is used by the firmware uploader to
|
|
* reinitialize the device.
|
|
*
|
|
* IMPORTANT: this is called very early in the device setup
|
|
* process, so it cannot rely on common infrastructure being laid
|
|
* out.
|
|
*
|
|
* IMPORTANT: don't call reset on RT_BUS with i2400m->init_mutex
|
|
* held, as the .pre/.post reset handlers will deadlock.
|
|
*
|
|
* @bus_bm_retries: [fill] How many times shall a firmware upload /
|
|
* device initialization be retried? Different models of the same
|
|
* device might need different values, hence it is set by the
|
|
* bus-specific driver. Note this value is used in two places,
|
|
* i2400m_fw_dnload() and __i2400m_dev_start(); they won't become
|
|
* multiplicative (__i2400m_dev_start() calling N times
|
|
* i2400m_fw_dnload() and this trying N times to download the
|
|
* firmware), as if __i2400m_dev_start() only retries if the
|
|
* firmware crashed while initializing the device (not in a
|
|
* general case).
|
|
*
|
|
* @bus_bm_cmd_send: [fill] Function called to send a boot-mode
|
|
* command. Flags are defined in 'enum i2400m_bm_cmd_flags'. This
|
|
* is synchronous and has to return 0 if ok or < 0 errno code in
|
|
* any error condition.
|
|
*
|
|
* @bus_bm_wait_for_ack: [fill] Function called to wait for a
|
|
* boot-mode notification (that can be a response to a previously
|
|
* issued command or an asynchronous one). Will read until all the
|
|
* indicated size is read or timeout. Reading more or less data
|
|
* than asked for is an error condition. Return 0 if ok, < 0 errno
|
|
* code on error.
|
|
*
|
|
* The caller to this function will check if the response is a
|
|
* barker that indicates the device going into reset mode.
|
|
*
|
|
* @bus_fw_names: [fill] a NULL-terminated array with the names of the
|
|
* firmware images to try loading. This is made a list so we can
|
|
* support backward compatibility of firmware releases (eg: if we
|
|
* can't find the default v1.4, we try v1.3). In general, the name
|
|
* should be i2400m-fw-X-VERSION.sbcf, where X is the bus name.
|
|
* The list is tried in order and the first one that loads is
|
|
* used. The fw loader will set i2400m->fw_name to point to the
|
|
* active firmware image.
|
|
*
|
|
* @bus_bm_mac_addr_impaired: [fill] Set to true if the device's MAC
|
|
* address provided in boot mode is kind of broken and needs to
|
|
* be re-read later on.
|
|
*
|
|
* @bus_bm_pokes_table: [fill/optional] A table of device addresses
|
|
* and values that will be poked at device init time to move the
|
|
* device to the correct state for the type of boot/firmware being
|
|
* used. This table MUST be terminated with (0x000000,
|
|
* 0x00000000) or bad things will happen.
|
|
*
|
|
*
|
|
* @wimax_dev: WiMAX generic device for linkage into the kernel WiMAX
|
|
* stack. Due to the way a net_device is allocated, we need to
|
|
* force this to be the first field so that we can get from
|
|
* netdev_priv() the right pointer.
|
|
*
|
|
* @updown: the device is up and ready for transmitting control and
|
|
* data packets. This implies @ready (communication infrastructure
|
|
* with the device is ready) and the device's firmware has been
|
|
* loaded and the device initialized.
|
|
*
|
|
* Write to it only inside a i2400m->init_mutex protected area
|
|
* followed with a wmb(); rmb() before accesing (unless locked
|
|
* inside i2400m->init_mutex). Read access can be loose like that
|
|
* [just using rmb()] because the paths that use this also do
|
|
* other error checks later on.
|
|
*
|
|
* @ready: Communication infrastructure with the device is ready, data
|
|
* frames can start to be passed around (this is lighter than
|
|
* using the WiMAX state for certain hot paths).
|
|
*
|
|
* Write to it only inside a i2400m->init_mutex protected area
|
|
* followed with a wmb(); rmb() before accesing (unless locked
|
|
* inside i2400m->init_mutex). Read access can be loose like that
|
|
* [just using rmb()] because the paths that use this also do
|
|
* other error checks later on.
|
|
*
|
|
* @rx_reorder: 1 if RX reordering is enabled; this can only be
|
|
* set at probe time.
|
|
*
|
|
* @state: device's state (as reported by it)
|
|
*
|
|
* @state_wq: waitqueue that is woken up whenever the state changes
|
|
*
|
|
* @tx_lock: spinlock to protect TX members
|
|
*
|
|
* @tx_buf: FIFO buffer for TX; we queue data here
|
|
*
|
|
* @tx_in: FIFO index for incoming data. Note this doesn't wrap around
|
|
* and it is always greater than @tx_out.
|
|
*
|
|
* @tx_out: FIFO index for outgoing data
|
|
*
|
|
* @tx_msg: current TX message that is active in the FIFO for
|
|
* appending payloads.
|
|
*
|
|
* @tx_sequence: current sequence number for TX messages from the
|
|
* device to the host.
|
|
*
|
|
* @tx_msg_size: size of the current message being transmitted by the
|
|
* bus-specific code.
|
|
*
|
|
* @tx_pl_num: total number of payloads sent
|
|
*
|
|
* @tx_pl_max: maximum number of payloads sent in a TX message
|
|
*
|
|
* @tx_pl_min: minimum number of payloads sent in a TX message
|
|
*
|
|
* @tx_num: number of TX messages sent
|
|
*
|
|
* @tx_size_acc: number of bytes in all TX messages sent
|
|
* (this is different to net_dev's statistics as it also counts
|
|
* control messages).
|
|
*
|
|
* @tx_size_min: smallest TX message sent.
|
|
*
|
|
* @tx_size_max: biggest TX message sent.
|
|
*
|
|
* @rx_lock: spinlock to protect RX members and rx_roq_refcount.
|
|
*
|
|
* @rx_pl_num: total number of payloads received
|
|
*
|
|
* @rx_pl_max: maximum number of payloads received in a RX message
|
|
*
|
|
* @rx_pl_min: minimum number of payloads received in a RX message
|
|
*
|
|
* @rx_num: number of RX messages received
|
|
*
|
|
* @rx_size_acc: number of bytes in all RX messages received
|
|
* (this is different to net_dev's statistics as it also counts
|
|
* control messages).
|
|
*
|
|
* @rx_size_min: smallest RX message received.
|
|
*
|
|
* @rx_size_max: buggest RX message received.
|
|
*
|
|
* @rx_roq: RX ReOrder queues. (fw >= v1.4) When packets are received
|
|
* out of order, the device will ask the driver to hold certain
|
|
* packets until the ones that are received out of order can be
|
|
* delivered. Then the driver can release them to the host. See
|
|
* drivers/net/i2400m/rx.c for details.
|
|
*
|
|
* @rx_roq_refcount: refcount rx_roq. This refcounts any access to
|
|
* rx_roq thus preventing rx_roq being destroyed when rx_roq
|
|
* is being accessed. rx_roq_refcount is protected by rx_lock.
|
|
*
|
|
* @rx_reports: reports received from the device that couldn't be
|
|
* processed because the driver wasn't still ready; when ready,
|
|
* they are pulled from here and chewed.
|
|
*
|
|
* @rx_reports_ws: Work struct used to kick a scan of the RX reports
|
|
* list and to process each.
|
|
*
|
|
* @src_mac_addr: MAC address used to make ethernet packets be coming
|
|
* from. This is generated at i2400m_setup() time and used during
|
|
* the life cycle of the instance. See i2400m_fake_eth_header().
|
|
*
|
|
* @init_mutex: Mutex used for serializing the device bringup
|
|
* sequence; this way if the device reboots in the middle, we
|
|
* don't try to do a bringup again while we are tearing down the
|
|
* one that failed.
|
|
*
|
|
* Can't reuse @msg_mutex because from within the bringup sequence
|
|
* we need to send messages to the device and thus use @msg_mutex.
|
|
*
|
|
* @msg_mutex: mutex used to send control commands to the device (we
|
|
* only allow one at a time, per host-device interface design).
|
|
*
|
|
* @msg_completion: used to wait for an ack to a control command sent
|
|
* to the device.
|
|
*
|
|
* @ack_skb: used to store the actual ack to a control command if the
|
|
* reception of the command was successful. Otherwise, a ERR_PTR()
|
|
* errno code that indicates what failed with the ack reception.
|
|
*
|
|
* Only valid after @msg_completion is woken up. Only updateable
|
|
* if @msg_completion is armed. Only touched by
|
|
* i2400m_msg_to_dev().
|
|
*
|
|
* Protected by @rx_lock. In theory the command execution flow is
|
|
* sequential, but in case the device sends an out-of-phase or
|
|
* very delayed response, we need to avoid it trampling current
|
|
* execution.
|
|
*
|
|
* @bm_cmd_buf: boot mode command buffer for composing firmware upload
|
|
* commands.
|
|
*
|
|
* USB can't r/w to stack, vmalloc, etc...as well, we end up
|
|
* having to alloc/free a lot to compose commands, so we use these
|
|
* for stagging and not having to realloc all the time.
|
|
*
|
|
* This assumes the code always runs serialized. Only one thread
|
|
* can call i2400m_bm_cmd() at the same time.
|
|
*
|
|
* @bm_ack_buf: boot mode acknoledge buffer for staging reception of
|
|
* responses to commands.
|
|
*
|
|
* See @bm_cmd_buf.
|
|
*
|
|
* @work_queue: work queue for processing device reports. This
|
|
* workqueue cannot be used for processing TX or RX to the device,
|
|
* as from it we'll process device reports, which might require
|
|
* further communication with the device.
|
|
*
|
|
* @debugfs_dentry: hookup for debugfs files.
|
|
* These have to be in a separate directory, a child of
|
|
* (wimax_dev->debugfs_dentry) so they can be removed when the
|
|
* module unloads, as we don't keep each dentry.
|
|
*
|
|
* @fw_name: name of the firmware image that is currently being used.
|
|
*
|
|
* @fw_version: version of the firmware interface, Major.minor,
|
|
* encoded in the high word and low word (major << 16 | minor).
|
|
*
|
|
* @fw_hdrs: NULL terminated array of pointers to the firmware
|
|
* headers. This is only available during firmware load time.
|
|
*
|
|
* @fw_cached: Used to cache firmware when the system goes to
|
|
* suspend/standby/hibernation (as on resume we can't read it). If
|
|
* NULL, no firmware was cached, read it. If ~0, you can't read
|
|
* any firmware files (the system still didn't come out of suspend
|
|
* and failed to cache one), so abort; otherwise, a valid cached
|
|
* firmware to be used. Access to this variable is protected by
|
|
* the spinlock i2400m->rx_lock.
|
|
*
|
|
* @barker: barker type that the device uses; this is initialized by
|
|
* i2400m_is_boot_barker() the first time it is called. Then it
|
|
* won't change during the life cycle of the device and every time
|
|
* a boot barker is received, it is just verified for it being the
|
|
* same.
|
|
*
|
|
* @pm_notifier: used to register for PM events
|
|
*
|
|
* @bus_reset_retries: counter for the number of bus resets attempted for
|
|
* this boot. It's not for tracking the number of bus resets during
|
|
* the whole driver life cycle (from insmod to rmmod) but for the
|
|
* number of dev_start() executed until dev_start() returns a success
|
|
* (ie: a good boot means a dev_stop() followed by a successful
|
|
* dev_start()). dev_reset_handler() increments this counter whenever
|
|
* it is triggering a bus reset. It checks this counter to decide if a
|
|
* subsequent bus reset should be retried. dev_reset_handler() retries
|
|
* the bus reset until dev_start() succeeds or the counter reaches
|
|
* I2400M_BUS_RESET_RETRIES. The counter is cleared to 0 in
|
|
* dev_reset_handle() when dev_start() returns a success,
|
|
* ie: a successul boot is completed.
|
|
*
|
|
* @alive: flag to denote if the device *should* be alive. This flag is
|
|
* everything like @updown (see doc for @updown) except reflecting
|
|
* the device state *we expect* rather than the actual state as denoted
|
|
* by @updown. It is set 1 whenever @updown is set 1 in dev_start().
|
|
* Then the device is expected to be alive all the time
|
|
* (i2400m->alive remains 1) until the driver is removed. Therefore
|
|
* all the device reboot events detected can be still handled properly
|
|
* by either dev_reset_handle() or .pre_reset/.post_reset as long as
|
|
* the driver presents. It is set 0 along with @updown in dev_stop().
|
|
*
|
|
* @error_recovery: flag to denote if we are ready to take an error recovery.
|
|
* 0 for ready to take an error recovery; 1 for not ready. It is
|
|
* initialized to 1 while probe() since we don't tend to take any error
|
|
* recovery during probe(). It is decremented by 1 whenever dev_start()
|
|
* succeeds to indicate we are ready to take error recovery from now on.
|
|
* It is checked every time we wanna schedule an error recovery. If an
|
|
* error recovery is already in place (error_recovery was set 1), we
|
|
* should not schedule another one until the last one is done.
|
|
*/
|
|
struct i2400m {
|
|
struct wimax_dev wimax_dev; /* FIRST! See doc */
|
|
|
|
unsigned updown:1; /* Network device is up or down */
|
|
unsigned boot_mode:1; /* is the device in boot mode? */
|
|
unsigned sboot:1; /* signed or unsigned fw boot */
|
|
unsigned ready:1; /* Device comm infrastructure ready */
|
|
unsigned rx_reorder:1; /* RX reorder is enabled */
|
|
u8 trace_msg_from_user; /* echo rx msgs to 'trace' pipe */
|
|
/* typed u8 so /sys/kernel/debug/u8 can tweak */
|
|
enum i2400m_system_state state;
|
|
wait_queue_head_t state_wq; /* Woken up when on state updates */
|
|
|
|
size_t bus_tx_block_size;
|
|
size_t bus_tx_room_min;
|
|
size_t bus_pl_size_max;
|
|
unsigned bus_bm_retries;
|
|
|
|
int (*bus_setup)(struct i2400m *);
|
|
int (*bus_dev_start)(struct i2400m *);
|
|
void (*bus_dev_stop)(struct i2400m *);
|
|
void (*bus_release)(struct i2400m *);
|
|
void (*bus_tx_kick)(struct i2400m *);
|
|
int (*bus_reset)(struct i2400m *, enum i2400m_reset_type);
|
|
ssize_t (*bus_bm_cmd_send)(struct i2400m *,
|
|
const struct i2400m_bootrom_header *,
|
|
size_t, int flags);
|
|
ssize_t (*bus_bm_wait_for_ack)(struct i2400m *,
|
|
struct i2400m_bootrom_header *, size_t);
|
|
const char **bus_fw_names;
|
|
unsigned bus_bm_mac_addr_impaired:1;
|
|
const struct i2400m_poke_table *bus_bm_pokes_table;
|
|
|
|
spinlock_t tx_lock; /* protect TX state */
|
|
void *tx_buf;
|
|
size_t tx_in, tx_out;
|
|
struct i2400m_msg_hdr *tx_msg;
|
|
size_t tx_sequence, tx_msg_size;
|
|
/* TX stats */
|
|
unsigned tx_pl_num, tx_pl_max, tx_pl_min,
|
|
tx_num, tx_size_acc, tx_size_min, tx_size_max;
|
|
|
|
/* RX stuff */
|
|
/* protect RX state and rx_roq_refcount */
|
|
spinlock_t rx_lock;
|
|
unsigned rx_pl_num, rx_pl_max, rx_pl_min,
|
|
rx_num, rx_size_acc, rx_size_min, rx_size_max;
|
|
struct i2400m_roq *rx_roq; /* access is refcounted */
|
|
struct kref rx_roq_refcount; /* refcount access to rx_roq */
|
|
u8 src_mac_addr[ETH_HLEN];
|
|
struct list_head rx_reports; /* under rx_lock! */
|
|
struct work_struct rx_report_ws;
|
|
|
|
struct mutex msg_mutex; /* serialize command execution */
|
|
struct completion msg_completion;
|
|
struct sk_buff *ack_skb; /* protected by rx_lock */
|
|
|
|
void *bm_ack_buf; /* for receiving acks over USB */
|
|
void *bm_cmd_buf; /* for issuing commands over USB */
|
|
|
|
struct workqueue_struct *work_queue;
|
|
|
|
struct mutex init_mutex; /* protect bringup seq */
|
|
struct i2400m_reset_ctx *reset_ctx; /* protected by init_mutex */
|
|
|
|
struct work_struct wake_tx_ws;
|
|
struct sk_buff *wake_tx_skb;
|
|
|
|
struct work_struct reset_ws;
|
|
const char *reset_reason;
|
|
|
|
struct work_struct recovery_ws;
|
|
|
|
struct dentry *debugfs_dentry;
|
|
const char *fw_name; /* name of the current firmware image */
|
|
unsigned long fw_version; /* version of the firmware interface */
|
|
const struct i2400m_bcf_hdr **fw_hdrs;
|
|
struct i2400m_fw *fw_cached; /* protected by rx_lock */
|
|
struct i2400m_barker_db *barker;
|
|
|
|
struct notifier_block pm_notifier;
|
|
|
|
/* counting bus reset retries in this boot */
|
|
atomic_t bus_reset_retries;
|
|
|
|
/* if the device is expected to be alive */
|
|
unsigned alive;
|
|
|
|
/* 0 if we are ready for error recovery; 1 if not ready */
|
|
atomic_t error_recovery;
|
|
|
|
};
|
|
|
|
|
|
/*
|
|
* Bus-generic internal APIs
|
|
* -------------------------
|
|
*/
|
|
|
|
static inline
|
|
struct i2400m *wimax_dev_to_i2400m(struct wimax_dev *wimax_dev)
|
|
{
|
|
return container_of(wimax_dev, struct i2400m, wimax_dev);
|
|
}
|
|
|
|
static inline
|
|
struct i2400m *net_dev_to_i2400m(struct net_device *net_dev)
|
|
{
|
|
return wimax_dev_to_i2400m(netdev_priv(net_dev));
|
|
}
|
|
|
|
/*
|
|
* Boot mode support
|
|
*/
|
|
|
|
/**
|
|
* i2400m_bm_cmd_flags - flags to i2400m_bm_cmd()
|
|
*
|
|
* @I2400M_BM_CMD_RAW: send the command block as-is, without doing any
|
|
* extra processing for adding CRC.
|
|
*/
|
|
enum i2400m_bm_cmd_flags {
|
|
I2400M_BM_CMD_RAW = 1 << 2,
|
|
};
|
|
|
|
/**
|
|
* i2400m_bri - Boot-ROM indicators
|
|
*
|
|
* Flags for i2400m_bootrom_init() and i2400m_dev_bootstrap() [which
|
|
* are passed from things like i2400m_setup()]. Can be combined with
|
|
* |.
|
|
*
|
|
* @I2400M_BRI_SOFT: The device rebooted already and a reboot
|
|
* barker received, proceed directly to ack the boot sequence.
|
|
* @I2400M_BRI_NO_REBOOT: Do not reboot the device and proceed
|
|
* directly to wait for a reboot barker from the device.
|
|
* @I2400M_BRI_MAC_REINIT: We need to reinitialize the boot
|
|
* rom after reading the MAC address. This is quite a dirty hack,
|
|
* if you ask me -- the device requires the bootrom to be
|
|
* initialized after reading the MAC address.
|
|
*/
|
|
enum i2400m_bri {
|
|
I2400M_BRI_SOFT = 1 << 1,
|
|
I2400M_BRI_NO_REBOOT = 1 << 2,
|
|
I2400M_BRI_MAC_REINIT = 1 << 3,
|
|
};
|
|
|
|
void i2400m_bm_cmd_prepare(struct i2400m_bootrom_header *);
|
|
int i2400m_dev_bootstrap(struct i2400m *, enum i2400m_bri);
|
|
int i2400m_read_mac_addr(struct i2400m *);
|
|
int i2400m_bootrom_init(struct i2400m *, enum i2400m_bri);
|
|
int i2400m_is_boot_barker(struct i2400m *, const void *, size_t);
|
|
static inline
|
|
int i2400m_is_d2h_barker(const void *buf)
|
|
{
|
|
const __le32 *barker = buf;
|
|
return le32_to_cpu(*barker) == I2400M_D2H_MSG_BARKER;
|
|
}
|
|
void i2400m_unknown_barker(struct i2400m *, const void *, size_t);
|
|
|
|
/* Make/grok boot-rom header commands */
|
|
|
|
static inline
|
|
__le32 i2400m_brh_command(enum i2400m_brh_opcode opcode, unsigned use_checksum,
|
|
unsigned direct_access)
|
|
{
|
|
return cpu_to_le32(
|
|
I2400M_BRH_SIGNATURE
|
|
| (direct_access ? I2400M_BRH_DIRECT_ACCESS : 0)
|
|
| I2400M_BRH_RESPONSE_REQUIRED /* response always required */
|
|
| (use_checksum ? I2400M_BRH_USE_CHECKSUM : 0)
|
|
| (opcode & I2400M_BRH_OPCODE_MASK));
|
|
}
|
|
|
|
static inline
|
|
void i2400m_brh_set_opcode(struct i2400m_bootrom_header *hdr,
|
|
enum i2400m_brh_opcode opcode)
|
|
{
|
|
hdr->command = cpu_to_le32(
|
|
(le32_to_cpu(hdr->command) & ~I2400M_BRH_OPCODE_MASK)
|
|
| (opcode & I2400M_BRH_OPCODE_MASK));
|
|
}
|
|
|
|
static inline
|
|
unsigned i2400m_brh_get_opcode(const struct i2400m_bootrom_header *hdr)
|
|
{
|
|
return le32_to_cpu(hdr->command) & I2400M_BRH_OPCODE_MASK;
|
|
}
|
|
|
|
static inline
|
|
unsigned i2400m_brh_get_response(const struct i2400m_bootrom_header *hdr)
|
|
{
|
|
return (le32_to_cpu(hdr->command) & I2400M_BRH_RESPONSE_MASK)
|
|
>> I2400M_BRH_RESPONSE_SHIFT;
|
|
}
|
|
|
|
static inline
|
|
unsigned i2400m_brh_get_use_checksum(const struct i2400m_bootrom_header *hdr)
|
|
{
|
|
return le32_to_cpu(hdr->command) & I2400M_BRH_USE_CHECKSUM;
|
|
}
|
|
|
|
static inline
|
|
unsigned i2400m_brh_get_response_required(
|
|
const struct i2400m_bootrom_header *hdr)
|
|
{
|
|
return le32_to_cpu(hdr->command) & I2400M_BRH_RESPONSE_REQUIRED;
|
|
}
|
|
|
|
static inline
|
|
unsigned i2400m_brh_get_direct_access(const struct i2400m_bootrom_header *hdr)
|
|
{
|
|
return le32_to_cpu(hdr->command) & I2400M_BRH_DIRECT_ACCESS;
|
|
}
|
|
|
|
static inline
|
|
unsigned i2400m_brh_get_signature(const struct i2400m_bootrom_header *hdr)
|
|
{
|
|
return (le32_to_cpu(hdr->command) & I2400M_BRH_SIGNATURE_MASK)
|
|
>> I2400M_BRH_SIGNATURE_SHIFT;
|
|
}
|
|
|
|
|
|
/*
|
|
* Driver / device setup and internal functions
|
|
*/
|
|
void i2400m_init(struct i2400m *);
|
|
int i2400m_reset(struct i2400m *, enum i2400m_reset_type);
|
|
void i2400m_netdev_setup(struct net_device *net_dev);
|
|
int i2400m_sysfs_setup(struct device_driver *);
|
|
void i2400m_sysfs_release(struct device_driver *);
|
|
int i2400m_tx_setup(struct i2400m *);
|
|
void i2400m_wake_tx_work(struct work_struct *);
|
|
void i2400m_tx_release(struct i2400m *);
|
|
|
|
int i2400m_rx_setup(struct i2400m *);
|
|
void i2400m_rx_release(struct i2400m *);
|
|
|
|
void i2400m_fw_cache(struct i2400m *);
|
|
void i2400m_fw_uncache(struct i2400m *);
|
|
|
|
void i2400m_net_rx(struct i2400m *, struct sk_buff *, unsigned, const void *,
|
|
int);
|
|
void i2400m_net_erx(struct i2400m *, struct sk_buff *, enum i2400m_cs);
|
|
void i2400m_net_wake_stop(struct i2400m *);
|
|
enum i2400m_pt;
|
|
int i2400m_tx(struct i2400m *, const void *, size_t, enum i2400m_pt);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
int i2400m_debugfs_add(struct i2400m *);
|
|
void i2400m_debugfs_rm(struct i2400m *);
|
|
#else
|
|
static inline int i2400m_debugfs_add(struct i2400m *i2400m)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void i2400m_debugfs_rm(struct i2400m *i2400m) {}
|
|
#endif
|
|
|
|
/* Initialize/shutdown the device */
|
|
int i2400m_dev_initialize(struct i2400m *);
|
|
void i2400m_dev_shutdown(struct i2400m *);
|
|
|
|
extern struct attribute_group i2400m_dev_attr_group;
|
|
|
|
|
|
/* HDI message's payload description handling */
|
|
|
|
static inline
|
|
size_t i2400m_pld_size(const struct i2400m_pld *pld)
|
|
{
|
|
return I2400M_PLD_SIZE_MASK & le32_to_cpu(pld->val);
|
|
}
|
|
|
|
static inline
|
|
enum i2400m_pt i2400m_pld_type(const struct i2400m_pld *pld)
|
|
{
|
|
return (I2400M_PLD_TYPE_MASK & le32_to_cpu(pld->val))
|
|
>> I2400M_PLD_TYPE_SHIFT;
|
|
}
|
|
|
|
static inline
|
|
void i2400m_pld_set(struct i2400m_pld *pld, size_t size,
|
|
enum i2400m_pt type)
|
|
{
|
|
pld->val = cpu_to_le32(
|
|
((type << I2400M_PLD_TYPE_SHIFT) & I2400M_PLD_TYPE_MASK)
|
|
| (size & I2400M_PLD_SIZE_MASK));
|
|
}
|
|
|
|
|
|
/*
|
|
* API for the bus-specific drivers
|
|
* --------------------------------
|
|
*/
|
|
|
|
static inline
|
|
struct i2400m *i2400m_get(struct i2400m *i2400m)
|
|
{
|
|
dev_hold(i2400m->wimax_dev.net_dev);
|
|
return i2400m;
|
|
}
|
|
|
|
static inline
|
|
void i2400m_put(struct i2400m *i2400m)
|
|
{
|
|
dev_put(i2400m->wimax_dev.net_dev);
|
|
}
|
|
|
|
int i2400m_dev_reset_handle(struct i2400m *, const char *);
|
|
int i2400m_pre_reset(struct i2400m *);
|
|
int i2400m_post_reset(struct i2400m *);
|
|
void i2400m_error_recovery(struct i2400m *);
|
|
|
|
/*
|
|
* _setup()/_release() are called by the probe/disconnect functions of
|
|
* the bus-specific drivers.
|
|
*/
|
|
int i2400m_setup(struct i2400m *, enum i2400m_bri bm_flags);
|
|
void i2400m_release(struct i2400m *);
|
|
|
|
int i2400m_rx(struct i2400m *, struct sk_buff *);
|
|
struct i2400m_msg_hdr *i2400m_tx_msg_get(struct i2400m *, size_t *);
|
|
void i2400m_tx_msg_sent(struct i2400m *);
|
|
|
|
|
|
/*
|
|
* Utility functions
|
|
*/
|
|
|
|
static inline
|
|
struct device *i2400m_dev(struct i2400m *i2400m)
|
|
{
|
|
return i2400m->wimax_dev.net_dev->dev.parent;
|
|
}
|
|
|
|
int i2400m_msg_check_status(const struct i2400m_l3l4_hdr *, char *, size_t);
|
|
int i2400m_msg_size_check(struct i2400m *, const struct i2400m_l3l4_hdr *,
|
|
size_t);
|
|
struct sk_buff *i2400m_msg_to_dev(struct i2400m *, const void *, size_t);
|
|
void i2400m_msg_to_dev_cancel_wait(struct i2400m *, int);
|
|
void i2400m_report_hook(struct i2400m *, const struct i2400m_l3l4_hdr *,
|
|
size_t);
|
|
void i2400m_report_hook_work(struct work_struct *);
|
|
int i2400m_cmd_enter_powersave(struct i2400m *);
|
|
int i2400m_cmd_exit_idle(struct i2400m *);
|
|
struct sk_buff *i2400m_get_device_info(struct i2400m *);
|
|
int i2400m_firmware_check(struct i2400m *);
|
|
int i2400m_set_idle_timeout(struct i2400m *, unsigned);
|
|
|
|
static inline
|
|
struct usb_endpoint_descriptor *usb_get_epd(struct usb_interface *iface, int ep)
|
|
{
|
|
return &iface->cur_altsetting->endpoint[ep].desc;
|
|
}
|
|
|
|
int i2400m_op_rfkill_sw_toggle(struct wimax_dev *, enum wimax_rf_state);
|
|
void i2400m_report_tlv_rf_switches_status(struct i2400m *,
|
|
const struct i2400m_tlv_rf_switches_status *);
|
|
|
|
/*
|
|
* Helpers for firmware backwards compatibility
|
|
*
|
|
* As we aim to support at least the firmware version that was
|
|
* released with the previous kernel/driver release, some code will be
|
|
* conditionally executed depending on the firmware version. On each
|
|
* release, the code to support fw releases past the last two ones
|
|
* will be purged.
|
|
*
|
|
* By making it depend on this macros, it is easier to keep it a tab
|
|
* on what has to go and what not.
|
|
*/
|
|
static inline
|
|
unsigned i2400m_le_v1_3(struct i2400m *i2400m)
|
|
{
|
|
/* running fw is lower or v1.3 */
|
|
return i2400m->fw_version <= 0x00090001;
|
|
}
|
|
|
|
static inline
|
|
unsigned i2400m_ge_v1_4(struct i2400m *i2400m)
|
|
{
|
|
/* running fw is higher or v1.4 */
|
|
return i2400m->fw_version >= 0x00090002;
|
|
}
|
|
|
|
|
|
/*
|
|
* Do a millisecond-sleep for allowing wireshark to dump all the data
|
|
* packets. Used only for debugging.
|
|
*/
|
|
static inline
|
|
void __i2400m_msleep(unsigned ms)
|
|
{
|
|
#if 1
|
|
#else
|
|
msleep(ms);
|
|
#endif
|
|
}
|
|
|
|
|
|
/* module initialization helpers */
|
|
int i2400m_barker_db_init(const char *);
|
|
void i2400m_barker_db_exit(void);
|
|
|
|
|
|
|
|
#endif /* #ifndef __I2400M_H__ */
|