Subversion Repositories openrisc_me

2003-02-12  Mark Salter  <msalter@redhat.com>

        * src/if_i82559.c: Remove restriction preventing combination of
        *_GET_ESA and *_HAS_EEPROM.

2003-01-03  Gary Thomas  <gary@mlbassoc.com>

        * src/if_i82559.c: 
        * cdl/intel_i82559_eth_drivers.cdl: Allow finer control over
        debug (chatter) by making control booldata.

2002-12-17  Mark Salter  <msalter@redhat.com>

        * src/if_i82559.c (CYGHWR_DEVS_ETH_INTEL_I82559_ENDIAN_NEUTRAL_IO): New
        flag to support systems where PCI IO operations are not affected by
        CPU endianess.

2002-10-06  Andrew Lunn  <andrew.lunn@ascom.ch>

        * src/if_i82559.c (pci_init_find_82559s): Changed scope of 
        max_interrupt_handle since its needed in other places.
        * src/if_i82559.c (i82559_stop): Corrected wrong name of variable
        in a diag_printf function.

2002-07-24  Gary Thomas  <gary@mlbassoc.com>

        * src/if_i82559.c (pci_init_find_82559s): 
        Allow platform to define CYGHWR_DEVS_ETH_INTEL_I82559_USE_MEMORY
        which forces use of memory instead of I/O space for device access.

2002-06-14  Gary Thomas  <gary@chez-thomas.org>

        * src/if_i82559.c: 
        Need to include <pkgconf/io_eth_drivers.h> for proper configuration
        of stand-alone (polled) vs. system (interrupt driven) mode.

2002-04-09  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (i82559_stop): Free up any pending transmissions
        to prevent MBUF store leaks if the calling thread - the one that's
        shutting down the interface - priority ends up higher than (or
        same as) the network service threads.

2002-03-26  Jonathan Larmour  <jlarmour@redhat.com>

        * src/if_i82559.c (wait_for_cmd_done): Don't assert if RUC_ADDR_LOAD
        command doesn't clear - on some chips it never does.

2002-03-18  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (pci_init_find_82559s): Move allocation of
        statistics pointer for each device to here, out of
        i82559_start().  It used to leak PCI window store every time the
        interface cycled down/up.  [Case 107110]

2002-02-25  Mark Salter  <msalter@redhat.com>

        * src/if_i82559.c: Don't call PacketRxReady in standalone configuration
        unless ready to accept a packet. Limit packet delivery to one packet at
        a time in standalone configuration.

2002-02-20  Hugo Tyson  <hmt@redhat.com>

        * include/i82559_info.h: New fields to record/control multicast
        all reception, oversized packet reception and promiscuous mode
        neatly.

        * src/if_i82559.c: Initial support for multicast address reception
        filtering.
        (i82559_restart): New routine to restart the device after fiddling
        with its setup - a tail recursion from i82559_start().
        (i82559_configure): More generic flags passed in and handled.
        (i82559_set_multicast): Routine to pass a set of addresses into
        the device; it works out the bitmap et al for us!
        (i82559_ioctl): Handle new case arms ETH_DRV_SET_MC_LIST and
        ETH_DRV_SET_MC_ALL if defined.  Reset and restart the device,
        diddling its status between.
        
2002-02-19  Mark Salter  <msalter@redhat.com>

        * src/if_i82559.c (pci_init_find_82559s): Don't use IRQ support if
        CYGPKG_IO_ETH_DRIVERS_STAND_ALONE.

2002-01-28  Mark Salter  <msalter@redhat.com>

        * src/if_i82559.c (pci_init_find_82559s): Removed CYG_ASSERT which
        assumed system PCI window exists.

2002-01-10  Jonathan Larmour  <jlarmour@redhat.com>

        * src/if_i82559.c (find_82559s_match_func): Add some more compatible PCI
        ids.

2002-01-03  Mark Salter  <msalter@redhat.com>

        * src/if_i82559.c (pci_init_find_82559s): Remove check that
        assumes driver owns entire PCI window.

        * cdl/intel_i82559_eth_drivers.cdl: Add
        CYGNUM_DEVS_ETH_INTEL_I82559_MAX_TX_DESCRIPTORS and
        CYGNUM_DEVS_ETH_INTEL_I82559_MAX_RX_DESCRIPTORS.

2001-11-19  Hugo Tyson  <hmt@redhat.com>
2001-11-19  Anssi Pulkkinen <Anssi.Pulkkinen@ascom.ch>

        * src/if_i82559.c (TxMachine): The test to see if there is a new
        tx to start must also say "go" if the tx queue is full.  Normally,
        if the txqueue is full, a tx will be occurring at all times - so
        one will complete soon, so the tx queue full flag will soon be
        cleared, and this condition will recover.  I suspect a subtle race
        which effectively means a new tx is queued and fills the queue in
        between two tx's, so no TxDone() follows, causes the hang which we
        get without this extra test under high load.  [CASE 106686]

2001-09-20  Gary Thomas  <gthomas@redhat.com>

        * src/if_i82559.c: Add declaration of 'i82559_stop' to quiet warning.

2001-09-13  Hugo Tyson  <hmt@redhat.com>

        * cdl/intel_i82559_eth_drivers.cdl: 
        * src/if_i82559.c: 
        Remove the tickle thread from this driver.  The functionality is
        now in the network timeout functionality which handles the
        "deliver" calls.  So it's only called if the net is quiet.

2001-09-12  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (TxDone): Defensive programming; zero the Tx key
        in the global data before making the callback.  This change
        appeared useful in our forebear, the EBSA-specific driver.

2001-08-29  Hugo Tyson  <hmt@redhat.com>

        * cdl/intel_i82559_eth_drivers.cdl: New CDL options called 
        CYGPKG_DEVS_ETH_INTEL_I82559_TICKLE_THREAD, .._PRIORITY and
        .._DELAY to control the thread.  By default this is all disabled
        because it is not needed for a real network application which
        itself proactively tries to use the net - it's only needed when
        the app is totally passive, so the driver otherwise does not get
        CPU time at all.
        
        * src/if_i82559.c (starti82559ticklethread): New code to start a
        thread (!) to catch lost interrupts and thus restart jammed
        hardware.  It's only possible if KERNEL and NET - RedBoot is
        unaffected, and it's not needed for RedBoot 'cos RedBoot polls.
        (TxMachine): An assert about the CU idle status sometimes fired;
        made the code more conservative wrt timing here.
        (comments): more documentation on the possible external configury
        by .inl file, described the two TIMEOUT macros that can be set,
        and indeed must be to use the tickling thread meaningfully.

2001-08-22  Gary Thomas  <gthomas@redhat.com>

        * src/if_i82559.c: 
        printf() is no longer a part of RedBoot.  Thus all programs
        must use diag_printf() and related functions instead.

2001-06-22  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c (i82559_init): Handle EEPROMS without CRC.

2001-05-16  Jonathan Larmour  <jlarmour@redhat.com>

        * src/if_i82559.c (udelay): Use virtual vector rather than assuming
        hal_delay_us() exists.

2001-04-09  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (pciwindow_mem_alloc): If asked, by
        CYGHWR_DEVS_ETH_INTEL_I82559_PCIMEM_DISCONTIGUOUS, check for
        breaks in the physical address of PCI window memory, and discard
        any block with a break in it, then redo the alloc.  This is for
        targets where smaller SDRAM chips are fitted than the address
        width, so they end up with gaps in (physical) memory.

2001-04-09  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (i82559_init): Support hardware with only one
        serial EEPROM attached to one device, but multiple devices.  This
        generally involves moving some decisions for eg. programming
        EEPROM or not, optionally from compiletime to runtime.  Improved
        the diagnostics a bit also, and fixed some bugs.
        (eth_set_mac_address): now takes an arg to say whether we want to
        program the EEPROM, or are just setting up the chip.
        (i82559_ioctl): This is the only place we set that arg to write
        the EEPROM, startup never tries to write EEPROM from any external
        source such as configured ESA or RedBoot params.

2001-04-09  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (i82559_start): Warnings fixed; unused vars
        following previous change.

2001-04-09  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (i82559_start): Do not wait for command
        completion after the initial DUMPSTATS operation.  The code to
        wait was bogus; it was looking at the structure in the wrong way.
        In any case, there is no need to wait, the wait_for_cmd_done() in
        any following activity is good enough.

2001-03-28  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (update_statistics): Fix warning - only declare
        op_i82559 if we use it - from previous change.

2001-03-23  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (i82559_can_send, i82559_send): Count up and
        down entries into these routines, and always say "no" to
        can_send() if we are recursing, ie. within_send != 0.  This is a
        good idea because it limits stack usage.  The recursion happens
        because of the very neccessary polling of rx state within the tx
        routines - which can deliver packets up into the stack, which can
        trigger a response tx and so on...  Also fixed a harmless bug
        where, after polling, the p_i82559 current device state pointer
        pointer to the wrong device, if we polled both devs regardless; it
        only caused problems with the within_send recursion count.

        * include/i82559_info.h (I82559): Add within_send field.

2001-03-15  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (i82559_init): Support external macro
        CYGHWR_DEVS_ETH_INTEL_I82559_GET_ESA(...), which if defined, is
        used to acquire a MAC address, on the assumption that there is no
        EEPROM present.  CYGHWR_DEVS_ETH_INTEL_I82559_HAS_NO_EEPROM
        confirms that there is no EEPROM attached to the 82559(s) so we
        can omit all that code.  It's in the negative sense because it's
        the unusual case.

2001-03-13  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (CYGHWR_DEVS_ETH_INTEL_I82559_DEMUX_ALL): Fully
        enable "DEMUX_ALL" option; all devices are scanned for
        activity/wedging/interrupts at every opportunity.  Multiple
        devices on the same interrupts are now supported.

2001-03-12  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c (i82559_configure): New routine combines actions
        of eth_set_promiscuous_mode() and eth_set_config() both of which
        disappear.  Thus the device is always configured correctly from
        the start.  [from a patch from Martin Buck  <martin.buck@ascom.ch>
        via the EBSA285 driver]
        (eth_dsr): Do not call upper layer unless we are in a networked
        [non-RedBoot, non-polled] environment.  This is necessary because
        we call our own DSR from foreground to unstick after a lost
        interrupt.
        (find_82559s_match_func): New routine to discover disparate
        devices on the PCI bus.  Used in pci_init_find_82559s().
        (dump_txcb): Various junk debug functions removed.

2001-03-12  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c: Some tidying up, and two main additions to the
        mechanisms used for managing this nasty entomological device.
        (i82559_can_send): [amongst other places] if it is defined, use
        CYGHWR_DEVS_ETH_INTEL_I82559_MISSED_INTERRUPT(p_i82559) to detect
        that we missed an interrupt - and if so, call the ISR and DSR
        directly.  This is necessary for edge-triggered interrupt
        controllers being fed by this level-sending device, where an
        internal event in the device can keep the line low after the code
        thinks that all events have been handled.
        (Check82559TxLockupTimeout): This routine runs a timeout (if the
        HAL provides a pair of watchdog-like macros) which performs a
        selective reset of the device if it takes too long to transmit.
        This happens rarely, but when it happens this is the only way out;
        the tx machine is fixated on one tx and never comes out of it.
        

        Sadly these two techniques to escape lockup only work if the
        driver is called (ie. the stack tries to tx); incoming packets
        cannot unwedge a device.  We might need to add a poll from the
        stack in future if this causes problems.
        
        * include/i82559_info.h (I82559): Added two words for managing tx
        lockup timeouts since this must be per-device.

2001-03-02  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c: Remove "Platform specific - defaults provided"
        definitions for CYGHWR_INTEL_I82559_PCI_MEM_MAP_BASE/SIZE; all
        platforms now provide these.
        Added a little further disclaimer to the comment about LE/BE/GE.

2001-03-01  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c: Global change: what was HAL_READ_UINTxx or
        HAL_WRITE_UINTxx are now READMEMxx or WRITEMEMxx - just
        convenience macros that do all the volatile casts we want there.
        Definitions of INL, INW, INB and OUTL, OUTW, OUTB recast in terms
        of HAL_READ_UINTxx or HAL_WRITE_UINTxx so that they will use
        proper IO operations on those CISCy mainframes that have a special
        way of doing IO.

2001-03-01  Hugo Tyson  <hmt@redhat.com>

        * src/if_i82559.c: Much more configury added, so that I can use it
        with a new target board.  Including, but not limited to:

        o An essay about addressing, big endian, little endian and GIB
        endian (sic) and how we treat the various types of access within
        this module.  In other words, a lot of comments.

        o CYGNUM_DEVS_ETH_INTEL_I82559_SEPARATE_MUX_INTERRUPT to clarify
        that such an interrupt is SEPARATE from any simplex intrs that are
        also available.

        o CYGHWR_DEVS_ETH_INTEL_I82559_DEMUX_ALL for hardware where the
        the only interrupt is a multiplexed (wire or'd) one.  Plus
        associated macros for direct manipulation of interrupt masks and
        acknowledgments.

        o Support for external definition from the platform HAL or driver
        config module of CYGHWR_INTEL_I82559_PCI_MEM_MAP_BASE and SIZE.
        Also CYGHWR_INTEL_I82559_PCI_VIRT_TO_BUS.

        o LE definitions of a few macros that were missing.

        o Separated definitions of structure offsets from BE/LE
        definitions of consts within the words.  Offsets vary with GIB
        endian, for those CPUs who just flip bits.  No change for BE
        machines, needed for LE machines to work.  To enable address-flip
        within structures, define CYG_ADDRESSING_IS_GIBENDIAN.

        o Re-org of mux/simplex deliver and isr's for new configuration.

        o Couple of extra debug printouts.

2001-01-26  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c: Added FIXME for promiscuous mode.

2001-01-25  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c: Replace CYGNUM_HAL_INTERRUPT_PCI_IRQ with
        CYGNUM_DEVS_ETH_INTEL_I82559_MUX_INTERRUPT which platform .inl
        must provide when appropriate. Changed _deliver functions to match
        _isr functions.
        * include/i82559_info.h: Remove debug hacks.
        Fix declaration.

        * src/if_i82559.c: Moved device descriptors into platform header.
        Allow individual devices to hardwire ESA. Handle N devices instead
        of just 1 or 2.
        * include/i82559_info.h: ESA hardwired flag added.
        * cdl/intel_i82559_eth_drivers.cdl: Device details moved to
        platform CDL.

        * src/if_i82559.c (i82559_start): Poll status after dump command.

2001-01-24  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c: [changes from yesterday] Some more endian
        fiddle, and the device coughs out the initial ARP packets.
        (wait_for_cmd_done): semantics changed to wait for pending CU
        cmds.
        (i82559_reset): Cleaned up to spec. Init register bases after
        reset.
        Fix initialization of hardwired ESA.
        Correct configuration command.
        Fix rcv len masking.
        (eth_set_mac_address): Set driver's ESA as well. Proper check for
        completion.
        Fix LE structure offsets.
        (i82559_start): Call new eth_set_config to enable device. Last
        hacks cleaned up.
        Remove a few printfs.

2001-01-23  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c: Debug hackery and some endian issues resolved.

2001-01-22  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c: Major changes, getting rid of device structures
        in favor of HAL IO accessor macros. Also added endian conversion
        macros where required.
        * include/i82559_info.h: Change type of device structures to char.

2001-01-19  Jesper Skov  <jskov@redhat.com>

        * cdl/intel_i82559_eth_drivers.cdl: Hack for just one interface
        now.
        * src/if_i82559.c: Fix IO functions. Handle EEPROM not being
        attached to device.

        * src/if_i82559.c: Use uncached/physical address translation
        macros.

2001-01-15  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c: Handle endian differences between controller
        and CPU. Leave usdelay to HAL. Hack around PCI-base-at-0
        assumption.
        Increase SK_DELAY (not that it changed anything, but now it's to
        the spec), hardwire static ESA.
        
2001-01-12  Jesper Skov  <jskov@redhat.com>

        * src/if_i82559.c (pci_init_find_82559s): Check that device has
        been found before accessing it. 
        (pci_init_find_82559s): Only delay if devices were
        found. Recognize 82559ER code as well.

2001-01-10  Jesper Skov  <jskov@redhat.com>
        
        * src/if_i82559.c: Minor hacks to get it to build.
        * include/i82559_info.h: Same.
        * cdl/intel_i82559_eth_drivers.cdl: Same.

2000-12-07  Jesper Skov  <jskov@redhat.com>

        * cdl/intel_i82559_eth_drivers.cdl: Cloned from the EBSA driver.
        * include/i82559_info.h: Same.
        * src/if_i82559.c: Same.

2000-11-19  Gary Thomas  <gthomas@redhat.com>

        * src/if_ebsa285.c (pci_init_find_82559s): Intel has at least
        two devices equivalent to the 82559.  Support both (0x1229, 0x01030).

2000-10-05  Hugo Tyson  <hmt@redhat.com>

        * src/if_ebsa285.c: Deal with device interrupts in a nested
        fashion - disable/restore is the semantics now, rather than
        unconditionally unmasking.  Also go directly to the 21285 PIC's
        interrupt control registers to gain atomicity for these.  Poll for
        ready received packets when acknowledging an interrupt in the
        tranmitting world; a race here could lose an Rx interrupt.  Which
        doesn't matter on a busy system, but in quieter times...  there
        will always be such a race because of the vague way the i82559's
        status bits reflect how it's yanking the interrupt line; you have
        to poll until the interrupt is gone before returning else spurious
        interrupt failures occur.  The issue is to close the window as
        tightly as possible, which this change achieves at a minor cost in
        performance - because of the time spent polling when not required.

2000-09-11  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (i82559_poll): Only diddle the interface we
        were asked to.  This is more correct in terms of the intent of the
        API, though it shouldn't really be necessary.

2000-09-06  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (pci_init_find_82559s): Add asserts and an
        unconditional check that the PCI window as configured matches the
        address and size of the pci_window region from the MLT.  This is
        here because at present the MLT and CT cannot intercommunicate
        enough.  The separation of the PCI window is needed because
        otherwise the malloc heap will eat all memory.  [This is related
        to CR 902624-CR, "MLT needs to be configuration aware"]

2000-09-01  Hugo Tyson  <hmt@cygnus.co.uk>

        * OVERVIEW: This is part of the change to the network stack to
        greatly reduce latencies both of (other) DSRs and of thread
        scheduling.  All the work that the network stack *and* individual
        ether drivers used to do in DSRs (including alarm callbacks and
        data copies to/from the device memory) is moved into a "fast
        network thread" instead.  It calls a device's "deliver" function
        to do the work that was previously in the DSR.  This is a separate
        thread so that it can be set higher priority than application
        threads in order to minimize packet loss (depending on the
        driver), if required (the application threads presumed to be
        higher priority in turn than the network thread).  A crucial
        consequence of this is that we are no longer locking against DSRs,
        so a plain mutex can be used rather than the global scheduler
        lock, thus simplifying all the splfoo/splx() style functions.

        * src/if_ebsa285.c: Minor: fix the big assert in i82559_send()
        which suffered a race condition when called from the fast thread
        rather than from a DSR.  Major: Add a "deliver" entry to the
        interface record for the "fast thread" implementation of the
        network internal comms system.  Provide a pass-up DSR to the
        logical ether driver's DSR and appropriate delivery routine(s).
        i82559_poll() now calls i82559_deliver() rather than the DSR.  Add
        valid data for mux'd DSR to pass on up.

2000-09-01  Hugo Tyson  <hmt@cygnus.co.uk>

        * tests/test_net_realtime.h: Tighten up the latency requirements
        by a factor of 5; it all seems happy, so committed.

2000-08-25  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (i82559_ioctl): A little further diddling; have
        a bool to say whether the dot3 info is filled in.

2000-08-24  Hugo Tyson  <hmt@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl: Do not export a symbol for the
        device info file (include/ebsa285_info.h) since nobody needs
        (portably) to include it now.

        * src/if_ebsa285.c (i82559_ioctl): Handle new ioctl calls
        ETH_DRV_GET_IF_STATS_UD and ETH_DRV_GET_IF_STATS to get loads of
        statistical information out.  _UD means update.  The nonUD one can
        be used instead mostly, if we find the performance hit too large.
        This should allow SNMP (a) to not explode, (b) to get useful info
        out of other device implementations than this one.

        * include/ebsa285_info.h: Remove all the macro cruft for feature
        detecting of lots of individual statistics; we now just have a
        catch-all struct that SNMP uses, defined in the common ether
        driver environment.

2000-08-15  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (PacketRxReady): Put back the check for very
        small packets into the driver; the layer above checks for that
        (defensive programming) but only *after* asserting that the size
        is large enough, to help detect that scenario from other drivers.
        I believe we only have struct ether_header available if CYGPKG_NET
        but I could be wrong.
        [CASE 104353]

2000-08-08  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (eth_set_promiscuous_mode):
        - ccs->config_bytes[18]=0x70;
        + ccs->config_bytes[18]=0x72; // Keep the Padding Enable bit
        ...otherwise short frame sends don't work in promisc mode.
        [CASE 104289]

2000-08-07  Gary Thomas  <gthomas@redhat.com>

        * src/if_ebsa285.c (pciwindow_mem_alloc): Take out very noisy debug.

2000-08-03  Gary Thomas  <gthomas@redhat.com>

        * src/if_ebsa285.c: Changes for stand-alone mode.

        * cdl/ebsa285_eth_drivers.cdl: Ethernet driver package hierarchy changed.
        Add option to control number of interfaces.

2000-07-28  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (PacketRxReady): Do not attempt to forward
        short packets; eth_drv.c assumes there is at least a header there.
        (i82559_recv): Also be more careful and ASSERTive about -ve buffer
        sizes; be more defensive about sglists.  [CASE 104206]

2000-07-26  Gary Thomas  <gthomas@redhat.com>

        * src/if_ebsa285.c: Update for new eth_drv interfaces.

2000-07-18  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (i82559_poll): Fill in the flesh of this, it
        just calls ISR and DSR repeatedly.
        (i82559_start): Look in the device record for promiscuous mode
        flag; it should be passed though the common layer, but it's not
        [yet] - this change from Andrew Lunn/ASCOM.  Also a fix and delay
        to the promisc mode code per se.

2000-07-17  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (i82559_poll): New function, just to fill in
        the interface record; not used.

2000-06-27  Hugo Tyson  <hmt@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl: Add sesquipedalian option
        CYGDBG_DEVS_ETH_ARM_EBSA285_KEEP_82559_STATISTICS in (now)
        component CYGDBG_DEVS_ETH_ARM_EBSA285_KEEP_STATISTICS to control
        keeping (well, harvesting really) the i82559's internal stats.
        Reputedly, it doesn't service the net whilst this is happening, so
        it could be viewed a bad thing.  Hence the option.

        * include/ebsa285_info.h: Only describe the I82559_COUNTERS
        i82559_counters[2]; structs if full stats are to be kept.

        * src/if_ebsa285.c (update_statistics): Only include this if full
        stats are to be kept.

2000-06-27  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (ResetRxRing): Re-do the management of the
        RxRing; have an end-of-list flag (EL) in the last entry, and as
        you unload filled slots, drag it round after you.

2000-06-14  Hugo Tyson  <hmt@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl: Add option to control statistics
        keeping.

        * include/ebsa285_info.h: Act on it.

2000-06-13  Hugo Tyson  <hmt@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl: Properly include the new header
        file and define symbols to allow client code to get at it without
        knowing the particular device driver name.

        * include/ebsa285_info.h: New file: export various statistics
        information about the driver for use by monitoring and
        network-management systems.  This requires exposing the
        (otherwise) internal structures of the driver.

        * src/if_ebsa285.c: remove a lot of structure definitions &c that
        are now necessarily in the new header; add a couple of new
        routines which provide status and update statistics from the
        device into memory; tidy up control of whether stats-keeping is
        enabled.

2000-06-06  Hugo Tyson  <hmt@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl (define_proc): Add #define of
        CYGDAT_DEVS_ETH_DESCRIPTION in the config file for information.

2000-05-12  Hugo Tyson  <hmt@cygnus.co.uk>

        * tests/test_net_realtime.h (tnr_print_activity): New routine to
        check the system is working, tidied up the API.  It works!

2000-05-11  Hugo Tyson  <hmt@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl: Added export of the test header
        below, and config opts for controlling EEPROM writing and all the
        status chatter as the device starts up.

        * src/if_ebsa285.c: Reworked the code for reading and setting the
        EEPROM that holds the MAC address.  This is very ugly, but now
        more reliable.  Also tidied up printing cruft with neater
        configury, and made it an option (for safety) whether it's
        possible to write the EEPROM at all.

        * tests/test_net_realtime.h: New file - it is intended to be used
        by networking tests to verify that latency is not compromised by
        the stack and driver.  It's very platform specific, hence the
        location in here.  This is a preliminary version only.

2000-04-27  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c: A serious re-write.  This cuts out a lot of
        code from the old version and improves the performance greatly.

        The cruft was mainly doing lots of explicit event communication
        between the ISR and DSR, when in fact all the state needed is
        present in the tx/rx rings.  So both ISRs and DSRs regard their
        call as an opportunity to progress everything they can, rather
        than only dealing with one interrupt cause at a time; the
        connection between them is now rather looser.

        Interrups can now be re-enabled after the ISR (in other words they
        are not masked in the ISR), no need to wait for the DSR, but in
        consequence some DSR code must mask/unmask intrs as it works.

        The 82559 appears to be a little slow in reacting to commands and
        state changes, so some interrupts were being lost - or persisting
        beyond their desired life - so there's some kinda polling code to
        deal with that also.  We also rely on the foreground to kind of
        poll in the same way, in the send/can_send calls - we know the
        stack will re-try if necessary, though this is rare.

        The driver now works (albeit at much reduced performance) with as
        few as 6 rx and tx buffers - in other words the "queue full/out of
        rx buffers" states have been tested and all is well.  It works
        generally fine with 8 buffers of each kind.

        The mux ISR and DSR are now rather more polled than the old
        versions; we just try to do things with both devices (if active)
        by simply calling each unitary ISR/DSR respectively.

        I also re-ordered some of the code, moving utilities to the end of
        the file and grouping together Tx and Rx machines a bit better.

2000-04-13  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c: Attribution to Ron Spence, Pacific Softworks
        added as a contributor.

2000-04-07  Hugo Tyson  <hmt@cygnus.co.uk>

        * ecos.db: Re-organize device packages.  This is a massive change
        involving deleting all the sources for serial and ethernet drivers
        from where they used to live in
            packages/io/serial/current/src/ARCH/PLATFORM.[ch]
            packages/net/drivers/eth/PLATFORM/current/src/...
        and reinstating them in
            packages/devs/serial/ARCH/PLATFORM/current/src/...
            packages/devs/eth/ARCH/PLATFORM/current/src/...

        All these new packages are properly defined in ecos.db, and are
        all of type "hardware" so that a "target" can grab them.
        
        This directory layout is descriptive of the devices we have right
        now, arch and platform are separate levels just to make it easier
        to navigate in the filesystem and similar to the HAL structure in
        the filesystem.

        It is *not* prescriptive of future work; for example, the mythical
        common highly-portable 16550 serial driver which works on many
        targets would be called "devs/serial/s16550/current", or a serial
        device for a particular board (cogent springs to mind) that can
        work with different CPUs fitted is "devs/serial/cogent/current".

        Changelogs have been preserved and replicated over all the new
        packages, so that no history is lost.

        The contents of individual source files are unchanged; they build
        in just the same emvironment except for a very few cases where the
        config file name changed in this movement.

        Targets in ecos.db have been redefined to bring in all relevant
        hardware packages including net and serial drivers (but the newly
        included packages are only active if their desired parent is
        available.)
        
        The names of CDL options (and their #defines of course) stay the
        same for the serial drivers, for backward compatibility.

        * templates/*/current.ect: these have had CYGPKG_IO_SERIAL added
        rather than it being in (almost) all target definitions.
        
2000-03-29  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (i82559_recv): Be happy with NULLs in the
        SGlist; it means the caller is out of memory so drop the packet on
        the floor.  Also remove a completely redundant test.

2000-03-06  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (i82559_can_send): Update net driver to new
        interface style.  This is incomplete wrt promiscuous mode, but
        that's probably about all.

2000-02-14  Gary Thomas  <gthomas@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl: Update CDL to indicate multiple 
        interface support.

2000-02-14  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (pci_init_find_82559s): Tidy comments somewhat
        and set debug and stats collecting defines to most friendly
        settings.

2000-02-10  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c (PacketRxReady): Fix bug; current descriptor
        was not being write back for the callback to use.  Hence asserts
        on state of rfd were firing in busy times - that leading rfd had
        already been drained.

        Also rationalized meaning of DEBUG printy symbols a bit - it's now
        chatty during startup/foreground manipulations but not in any
        performance related activities ie. rx or tx.

2000-02-09  John Dallaway  <jld@cygnus.co.uk>

        * cdl/ebsa285_eth_drivers.cdl:

        Reparent under CYGPKG_NET_ETH_DRIVERS and tidy display strings.

2000-02-08  Hugo Tyson  <hmt@cygnus.co.uk>

        * src/if_ebsa285.c: New File.
        * cdl/ebsa285_eth_drivers.cdl: New File.

        Initial Checkin of EBSA285 Ethernet driver.

        It's one monolithic file at present, and should be split up into a
        more generic Intel 82559 driver plus platform-specific parts (PCI
        et al) plus eCos/Red-Hat-BSD-stack parts.
        
//===========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
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