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diff --git a/share/man/man9/utopia.9 b/share/man/man9/utopia.9 new file mode 100644 index 0000000..99be5fa --- /dev/null +++ b/share/man/man9/utopia.9 @@ -0,0 +1,353 @@ +.\" Copyright (c) 2003 +.\" Fraunhofer Institute for Open Communication Systems (FhG Fokus). +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. 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. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. +.\" +.\" Author: Hartmut Brandt <harti@FreeBSD.org> +.\" +.\" $FreeBSD$ +.\" +.Dd May 8, 2003 +.Dt UTOPIA 9 +.Os +.Sh NAME +.Nm utopia +.Nd "driver module for ATM PHY chips" +.Sh SYNOPSIS +.In dev/utopia/utopia.h +.Ft int +.Fo utopia_attach +.Fa "struct utopia *utp" "struct ifatm *ifatm" "struct ifmedia *media" +.Fa "struct mtx *lock" "struct sysctl_ctx_list *ctx" +.Fa "struct sysctl_oid_list *tree" "const struct utopia_methods *vtab" +.Fc +.Ft void +.Fn utopia_detach "struct utopia *utp" +.Ft int +.Fn utopia_start "struct utopia *utp" +.Ft void +.Fn utopia_stop "struct utopia *utp" +.Ft void +.Fn utopia_init_media "struct utopia *utp" +.Ft void +.Fn utopia_reset_media "struct utopia *utp" +.Ft int +.Fn utopia_reset "struct utopia *utp" +.Ft int +.Fn utopia_set_sdh "struct utopia *utp" "int sdh" +.Ft int +.Fn utopia_set_unass "struct utopia *utp" "int unass" +.Ft int +.Fn utopia_set_noscramb "struct utopia *utp" "int noscramb" +.Ft int +.Fn utopia_update_carrier "struct utopia *utp" +.Ft int +.Fn utopia_set_loopback "struct utopia *utp" "u_int mode" +.Ft void +.Fn utopia_intr "struct utopia *utp" +.Ft void +.Fn utopia_update_stats "struct utopia *utp" +.Sh DESCRIPTION +This module is used by all ATM drivers for cards that use a number of known +PHY chips to provide uniform functionality. +The module implements status monitoring in either interrupt or polling mode, +media option handling and application access to PHY registers. +.Pp +To use this interface, a driver must implement two functions for reading and +writing PHY registers, and initialize the following structure with pointers +to these functions: +.Bd -literal -offset indent +struct utopia_methods { + int (*readregs)(struct ifatm *, u_int reg, + uint8_t *val, u_int *n); + int (*writereg)(struct ifatm *, u_int reg, + u_int mask, u_int val); +}; +.Ed +.Pp +The +.Fn readregs +function should read PHY registers starting at register +.Fa reg . +The maximum number of registers to read is given by the integer pointed +to by +.Fa n . +The function should either return 0 on success, or an error code. +In the first case, +.Fa *n +should be set to the actual number of registers read. +The +.Fn writereg +function should write one register. +It must change all bits for which the corresponding bit in +.Fa mask +is 1 to the value of the corresponding bit in +.Fa val . +It returns either 0 on success, or an error code. +.Pp +The ATM driver's private state block +.Pq Va softc +must begin with a +.Vt "struct ifatm" . +.Pp +The +.Vt "struct utopia" +holds the current state of the PHY chip and contains the following fields: +.Bd -literal -offset indent +struct utopia { + struct ifatm *ifatm; /* driver data */ + struct ifmedia *media; /* driver supplied */ + struct mtx *lock; /* driver supplied */ + const struct utopia_methods *methods; + LIST_ENTRY(utopia) link; /* list of these structures */ + u_int flags; /* flags set by the driver */ + u_int state; /* current state */ + u_int carrier; /* carrier state */ + u_int loopback; /* loopback mode */ + const struct utopia_chip *chip; /* chip operations */ + struct utopia_stats1 stats; /* statistics */ +}; +.Ed +The public accessible fields have the following functions: +.Bl -tag -width indent +.It Va ifatm +Pointer to the driver's private data +.Pq Va softc . +.It Va media +Pointer to the driver's media structure. +.It Va lock +Pointer to a mutex provided by the driver. +This mutex is used to synchronize +with the kernel thread that handles device polling. +It is locked in several +places: +.Bl -enum -offset indent +.It +In +.Fn utopia_detach +the mutex is locked to sleep and wait for the kernel thread to remove the +.Vt "struct utopia" +from the list of all +.Nm +devices. +Before returning to the caller the mutex is unlocked. +.It +In the +.Nm +kernel thread the mutex is locked, and the +.Fn utopia_carrier_update +function is called with this mutex locked. +This will result in the driver's +.Fn readregs +function being called with the mutex locked. +.It +In the sysctl handlers the mutex will be locked before calling into the driver's +.Fn readreg +or +.Fn writereg +functions. +.El +.It Va flags +Flags set by either the driver or the +.Nm +module. +The following flags are +defined: +.Bl -tag -width indent +.It Dv UTP_FL_NORESET +If this flag is set, the module will not try to write the +SUNI master reset register. +(Set by the driver.) +.It Dv UTP_FL_POLL_CARRIER +If this flag is set, the module will periodically poll the carrier state +(as opposed to interrupt driven carrier state changes). +(Set by the driver.) +.El +.It Va state +Flags describing the current state of the PHY chip. +These are managed +by the module: +.Bl -tag -width indent +.It Dv UTP_ST_ACTIVE +The driver is active and the PHY registers can be accessed. +This is set by calling +.Fn utopia_start , +which should be called either in the attach routine of the driver or +in the network interface initialisation routine (depending on whether the +registers are accessible all the time or only when the interface is up). +.It Dv UTP_ST_SDH +Interface is in SDH mode as opposed to SONET mode. +.It Dv UTP_ST_UNASS +Interface is producing unassigned cells instead of idle cells. +.It Dv UTP_ST_NOSCRAMB +Cell scrambling is switched off. +.It Dv UTP_ST_DETACH +(Internal use.) +Interface is currently detaching. +.It Dv UTP_ST_ATTACHED +The attach routine has been run successfully. +.El +.It Va carrier +The carrier state of the interface. +This field can have one of three values: +.Bl -tag -width indent +.It Dv UTP_CARR_UNKNOWN +Carrier state is still unknown. +.It Dv UTP_CARR_OK +Carrier has been detected. +.It Dv UTP_CARR_LOST +Carrier has been lost. +.El +.It Va loopback +This is the current loopback mode of the interface. +Note that not all +chips support all loopback modes. +Refer to the chip documentation. +The +following modes may be supported: +.Bl -tag -width indent +.It Dv UTP_LOOP_NONE +No loopback, normal operation. +.It Dv UTP_LOOP_TIME +Timing source loopback. +The transmitter clock is driven by the receive clock. +.It Dv UTP_LOOP_DIAG +Diagnostic loopback. +.It Dv UTP_LOOP_LINE +Serial line loopback. +.It Dv UTP_LOOP_PARAL +Parallel diagnostic loopback. +.It Dv UTP_LOOP_TWIST +Twisted pair diagnostic loopback. +.It Dv UTP_LOOP_PATH +Diagnostic path loopback. +.El +.It Va chip +This points to a function vector for chip specific functions. +Two fields +in this vector are publicly available: +.Bl -tag -width indent +.It Va type +This is the type of the detected PHY chip. +One of: +.Pp +.Bl -tag -width indent -compact +.It Dv UTP_TYPE_UNKNOWN Pq No 0 +.It Dv UTP_TYPE_SUNI_LITE Pq No 1 +.It Dv UTP_TYPE_SUNI_ULTRA Pq No 2 +.It Dv UTP_TYPE_SUNI_622 Pq No 3 +.It Dv UTP_TYPE_IDT77105 Pq No 4 +.El +.It Va name +This is a string with the name of the PHY chip. +.El +.El +.Pp +The following functions are used by the driver during attach/detach and/or +initialisation/stopping the interface: +.Bl -tag -width indent +.It Fn utopia_attach +Attach the PHY chip. +This is called with a preallocated +.Vt "struct utopia" +(which may be part of the driver's +.Va softc ) . +The module initializes all fields of the +.Nm +state and the media field. +User settable flags should be set after the call to +.Fn utopia_attach . +This function may fail due to the inability to install the sysctl handlers. +In this case it will return \-1. +On success, 0 is returned and the +.Dv UTP_ST_ATTACHED +flag is set. +.It Fn utopia_detach +Remove the +.Nm +attachment from the system. +This cancels all outstanding polling +timeouts. +.It Fn utopia_start +Start operation of that PHY. +This should be called at a time +when the PHY registers are known to be accessible. +This may be either in +the driver's attach function or when the interface is set running. +.It Fn utopia_stop +Stop operation of the PHY attachment. +This may be called either in the detach +function of the driver or when the interface is brought down. +.It Fn utopia_init_media +This must be called if the media field in the ATM MIB was changed. +The function +makes sure, that the ifmedia fields contain the same information as the +ATM MIB. +.It Fn utopia_reset_media +This may be called to remove all media information from the ifmedia field. +.El +.Pp +The following functions can be used to modify the PHY state while the interface +is running: +.Bl -tag -width indent +.It Fn utopia_reset +Reset the operational parameters to the default state (SONET, idle cells, +scrambling enabled). +Returns 0 on success, an error code otherwise, leaving +the state undefined. +.It Fn utopia_set_sdh +If the argument is zero the chip is switched to Sonet mode, if it is non-zero +the chip is switched to SDH mode. +Returns 0 on success, an error code otherwise, +leaving the previous state. +.It Fn utopia_set_unass +If the argument is zero the chip is switched to produce idle cells, if it is +non-zero the chip is switched to produce unassigned cells. +Returns 0 on success, +an error code otherwise, leaving the previous state. +.It Fn utopia_set_noscramb +If the argument is zero enables scrambling, if it is +non-zero disables scrambling. +Returns 0 on success, +an error code otherwise, leaving the previous state. +.It Fn utopia_update_carrier +Check the carrier state and update the carrier field in the state structure. +This will generate a message to the Netgraph stack if the carrier state changes. +For chips that are polled this is called automatically, for interrupt +driven attachments this must be called on interrupts from the PHY chip. +.It Fn utopia_set_loopback +Set the loopback mode of the chip. +Returns 0 on success, an error code +otherwise, leaving the previous state. +.It Fn utopia_intr +Called when an interrupt from the PHY chip is detected. +This resets the +interrupt state by reading all registers and, if the interrupt was from the +RSOP, checks the carrier state. +.It Fn utopia_update_stats +Update the statistics with counters read from the chip. +.El +.Sh SEE ALSO +.Xr utopia 4 +.Sh AUTHORS +.An Harti Brandt Aq Mt harti@FreeBSD.org |
