Commit Graph

148 Commits

Author SHA1 Message Date
rpaulo
f05de09083 Convert the if_vr(4) driver model to the interrupt filter model and use
a taskqueue.

This gives a 16% performance improvement under high load on slow systems,
especially when vr shares an interrupt with another device, which is
common with the Alix x86 boards.
Contrary to the other devices, I left the interrupt processing for loop
in because there was no significant difference in performance and this
should avoid enqueuing more taskqueues unnecessarily.
We also decided to move the vr_start_locked() call inside the for loop
because we found out that it helps performance since TCP ACKs now have a
chance to go out quicker.

Reviewed by:	yongari (older version, same idea)
Discussed with:	yongari, jhb
2012-05-12 14:37:25 +00:00
yongari
11947ff83f Announce flow control capability to PHY drivers and enable flow
control for all vr(4) controllers that support it.  It's known that
old vr(4) controllers(Rhine II) does not support TX pause but Rhine
III supports both TX and RX pause.
Make TX pause really work on Rhine III by letting controller know
available RX buffers.
While here, adjust XON/XOFF parameters to get better performance
with flow control.
2011-11-28 19:03:59 +00:00
yongari
a9a6ab87cc Reuse flag variable to represent driver internal states rather than
using member variables in softc.
While I'm here change media after setting IFF_DRV_RUNNING. This
will remove unnecessary link state handling in vr_tick() if
controller established a link immediately.
2011-11-28 18:32:35 +00:00
marius
17e14c6132 - There's no need to overwrite the default device method with the default
one. Interestingly, these are actually the default for quite some time
  (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9)
  since r52045) but even recently added device drivers do this unnecessarily.
  Discussed with: jhb, marcel
- While at it, use DEVMETHOD_END.
  Discussed with: jhb
- Also while at it, use __FBSDID.
2011-11-22 21:28:20 +00:00
yongari
4c371e596b Close a race where SIOCGIFMEDIA ioctl get inconsistent link status.
Because driver is accessing a common MII structure in
mii_pollstat(), updating user supplied structure should be done
before dropping a driver lock.

Reported by:	Karim (fodillemlinkarimi <> gmail dot com)
2011-10-17 19:49:00 +00:00
marius
6e83ede6af Sprinkle const. 2011-10-09 20:16:51 +00:00
yongari
d62d61ee14 Remove link state change callback handler. There is no need to
register both status change and link state change callbacks.
Implement checking valid link in state change callback and poll
active link state in vr_tick().  This allows immediate detection of
lost link as well as protecting driver from frequent link flips during
link renegotiation.  taskq implementation was removed because driver
now needs to poll link state in vr_tick().
While I'm here do not report current link state if interface is not
running.

Tested by:	n_hibma
MFC after:	1 week
2011-06-22 02:18:45 +00:00
marius
d0f32374e6 - Remove attempts to implement setting of BMCR_LOOP/MIIF_NOLOOP
(reporting IFM_LOOP based on BMCR_LOOP is left in place though as
  it might provide useful for debugging). For most mii(4) drivers it
  was unclear whether the PHYs driven by them actually support
  loopback or not. Moreover, typically loopback mode also needs to
  be activated on the MAC, which none of the Ethernet drivers using
  mii(4) implements. Given that loopback media has no real use (and
  obviously hardly had a chance to actually work) besides for driver
  development (which just loopback mode should be sufficient for
  though, i.e one doesn't necessary need support for loopback media)
  support for it is just dropped as both NetBSD and OpenBSD already
  did quite some time ago.
- Let mii_phy_add_media() also announce the support of IFM_NONE.
- Restructure the PHY entry points to use a structure of entry points
  instead of discrete function pointers, and extend this to include
  a "reset" entry point. Make sure any PHY-specific reset routine is
  always used, and provide one for lxtphy(4) which disables MII
  interrupts (as is done for a few other PHYs we have drivers for).
  This includes changing NIC drivers which previously just called the
  generic mii_phy_reset() to now actually call the PHY-specific reset
  routine, which might be crucial in some cases. While at it, the
  redundant checks in these NIC drivers for mii->mii_instance not being
  zero before calling the reset routines were removed because as soon
  as one PHY driver attaches mii->mii_instance is incremented and we
  hardly can end up in their media change callbacks etc if no PHY driver
  has attached as mii_attach() would have failed in that case and not
  attach a miibus(4) instance.
  Consequently, NIC drivers now no longer should call mii_phy_reset()
  directly, so it was removed from EXPORT_SYMS.
- Add a mii_phy_dev_attach() as a companion helper to mii_phy_dev_probe().
  The purpose of that function is to perform the common steps to attach
  a PHY driver instance and to hook it up to the miibus(4) instance and to
  optionally also handle the probing, addition and initialization of the
  supported media. So all a PHY driver without any special requirements
  has to do in its bus attach method is to call mii_phy_dev_attach()
  along with PHY-specific MIIF_* flags, a pointer to its PHY functions
  and the add_media set to one. All PHY drivers were updated to take
  advantage of mii_phy_dev_attach() as appropriate. Along with these
  changes the capability mask was added to the mii_softc structure so
  PHY drivers taking advantage of mii_phy_dev_attach() but still
  handling media on their own do not need to fiddle with the MII attach
  arguments anyway.
- Keep track of the PHY offset in the mii_softc structure. This is done
  for compatibility with NetBSD/OpenBSD.
- Keep track of the PHY's OUI, model and revision in the mii_softc
  structure. Several PHY drivers require this information also after
  attaching and previously had to wrap their own softc around mii_softc.
  NetBSD/OpenBSD also keep track of the model and revision on their
  mii_softc structure. All PHY drivers were updated to take advantage
  as appropriate.
- Convert the mebers of the MII data structure to unsigned where
  appropriate. This is partly inspired by NetBSD/OpenBSD.
- According to IEEE 802.3-2002 the bits actually have to be reversed
  when mapping an OUI to the MII ID registers. All PHY drivers and
  miidevs where changed as necessary. Actually this now again allows to
  largely share miidevs with NetBSD, which fixed this problem already
  9 years ago. Consequently miidevs was synced as far as possible.
- Add MIIF_NOMANPAUSE and mii_phy_flowstatus() calls to drivers that
  weren't explicitly converted to support flow control before. It's
  unclear whether flow control actually works with these but typically
  it should and their net behavior should be more correct with these
  changes in place than without if the MAC driver sets MIIF_DOPAUSE.

Obtained from:	NetBSD (partially)
Reviewed by:	yongari (earlier version), silence on arch@ and net@
2011-05-03 19:51:29 +00:00
jhb
00c3c01f4f Do a sweep of the tree replacing calls to pci_find_extcap() with calls to
pci_find_cap() instead.
2011-03-23 13:10:15 +00:00
marius
385153aa98 Convert the PHY drivers to honor the mii_flags passed down and convert
the NIC drivers as well as the PHY drivers to take advantage of the
mii_attach() introduced in r213878 to get rid of certain hacks. For
the most part these were:
- Artificially limiting miibus_{read,write}reg methods to certain PHY
  addresses; we now let mii_attach() only probe the PHY at the desired
  address(es) instead.
- PHY drivers setting MIIF_* flags based on the NIC driver they hang
  off from, partly even based on grabbing and using the softc of the
  parent; we now pass these flags down from the NIC to the PHY drivers
  via mii_attach(). This got us rid of all such hacks except those of
  brgphy() in combination with bce(4) and bge(4), which is way beyond
  what can be expressed with simple flags.

While at it, I took the opportunity to change the NIC drivers to pass
up the error returned by mii_attach() (previously by mii_phy_probe())
and unify the error message used in this case where and as appropriate
as mii_attach() actually can fail for a number of reasons, not just
because of no PHY(s) being present at the expected address(es).

Reviewed by:	jhb, yongari
2010-10-15 14:52:11 +00:00
yongari
5b02e68240 vr_init_locked() will stop and reset the controller. Remove
unnecessary vr_stop()/vr_reset() calls.
2010-08-24 18:44:12 +00:00
yongari
25f4531fc3 Remove unnecessary controller reinitialization.
CAM filter handling was rewritten long time ago so it should not
require controller reinitialization.

PR:	kern/87506
2010-08-24 18:40:11 +00:00
rwatson
be5740a255 Use if_maddr_rlock()/if_maddr_runlock() rather than IF_ADDR_LOCK()/
IF_ADDR_UNLOCK() across network device drivers when accessing the
per-interface multicast address list, if_multiaddrs.  This will
allow us to change the locking strategy without affecting our driver
programming interface or binary interface.

For two wireless drivers, remove unnecessary locking, since they
don't actually access the multicast address list.

Approved by:	re (kib)
MFC after:	6 weeks
2009-06-26 11:45:06 +00:00
attilio
b523608331 When user_frac in the polling subsystem is low it is going to busy the
CPU for too long period than necessary.  Additively, interfaces are kept
polled (in the tick) even if no more packets are available.
In order to avoid such situations a new generic mechanism can be
implemented in proactive way, keeping track of the time spent on any
packet and fragmenting the time for any tick, stopping the processing
as soon as possible.

In order to implement such mechanism, the polling handler needs to
change, returning the number of packets processed.
While the intended logic is not part of this patch, the polling KPI is
broken by this commit, adding an int return value and the new flag
IFCAP_POLLING_NOCOUNT (which will signal that the return value is
meaningless for the installed handler and checking should be skipped).

Bump __FreeBSD_version in order to signal such situation.

Reviewed by:	emaste
Sponsored by:	Sandvine Incorporated
2009-05-30 15:14:44 +00:00
yongari
9d93d25c0e It seems there are still issues on multicast perfect filtering.
Disable it until I find spare time to analyze the issue.

Reported by:	Goran Lowkrantz <glz <> hidden-powers DOT com>
MFC after:	3 days
2008-12-12 01:26:11 +00:00
yongari
2f08b43b9b Fix typo. It restuled in activating unwanted Rx filtering as well
as resetting Rx threshold configuration.

Submitted by:	Joost Mulders < Joost.Mulders <> Sun DOT COM >
2008-11-17 00:50:59 +00:00
yongari
8949e679ff Fix a multicast handling regression on VT6105M introduced in
vr(4) overhauling(r177050).

It seems that filtering multicast addresses with multicast CAM
entries require accessing 'CAM enable bit' for each CAM entry.
Subsequent accessing multicast CAM control register without
toggling the 'CAM enable bit' seem to no effects.
In order to fix that separate CAM setup from CAM mask configuration
and CAM entry modification. While I'm here add VLAN CAM filtering
feature which will be enabled in future(FreeBSD now can receive
VLAN id insertion/removal event from vlan(4) on the fly).

For VT6105M hardware, explicitly disable VLAN hardware tag
insertion/stripping and enable VLAN CAM filtering for VLAN id 0.
This shall make non-VLAN frames set VR_RXSTAT_VIDHIT bit in Rx
status word.

Added multicast/VLAN CAM address definition to header file.

PR:	kern/125010, kern/125024
MFC after:	1 week
2008-07-16 08:35:29 +00:00
yongari
dc88e0e3e5 Fix VR_RXSTAT_RX_OK bit definition which lasted for more than 9
years. All datasheet I have indicates the bit 15 is the
VR_RXSTAT_RX_OK. The bit 14 is reserved for all Rhine family
except VT6105M. VT6105M uses that bit to indicate a VLAN frame
with matching CAM VLAN id.
Use the VR_RXSTAT_RX_OK instead of VR_RXSTAT_RXERR when vr(4)
checks the validity of received frame.
This should fix occasional dropping frames on VT6105M.

Tested by:	Goran Lowkrantz ( goran.lowkrantz at ismobile dot com )
MFC after:	1 week
2008-07-16 08:02:23 +00:00
yongari
554fc7905b Teach vr(4) to use bus_dma(9) and major overhauling to handle link
state change and reliable error recovery.
 o Moved vr_softc structure and relevant macros to header file.
 o Use PCIR_BAR macro to get BARs.
 o Implemented suspend/resume methods.
 o Implemented automatic Tx threshold configuration which will be
   activated when it suffers from Tx underrun. Also Tx underrun
   will try to restart only Tx path and resort to previous
   full-reset(both Rx/Tx) operation if restarting Tx path have failed.
 o Removed old bit-banging MII interface. Rhine provides simple and
   efficient MII interface. While I'm here show PHY address and PHY
   register number when its read/write operation was failed.
 o Define VR_MII_TIMEOUT constant and use it in MII access routines.
 o Always honor link up/down state reported by mii layers. The link
   state information is used in vr_start() to determine whether we
   got a valid link.
 o Removed vr_setcfg() which is now handled in vr_link_task(), link
   state taskqueue handler. When mii layer reports link state changes
   the taskqueue handler reprograms MAC to reflect negotiated duplex
   settings. Flow-control changes are not handled yet and it should
   be revisited when mii layer knows the notion of flow-control.
 o Added a new sysctl interface to get statistics of an instance of
   the driver.(sysctl dev.vr.0.stats=1)
 o Chip name was renamed to reflect the official name of the chips
   described in VIA Rhine I/II/III datasheet.
	REV_ID_3065_A -> REV_ID_VT6102_A
	REV_ID_3065_B -> REV_ID_VT6102_B
	REV_ID_3065_C -> REV_ID_VT6102_C
	REV_ID_3106_J -> REV_ID_VT6105_A0
	REV_ID_3106_S -> REV_ID_VT6105M_A0
   The following chip revisions were added.
	#define REV_ID_VT6105_B0	0x83
	#define REV_ID_VT6105_LOM	0x8A
	#define REV_ID_VT6107_A0	0x8C
	#define REV_ID_VT6107_A1	0x8D
	#define REV_ID_VT6105M_B1	0x94
 o Always show chip revision number in device attach. This shall help
   identifying revision specific issues.
 o Check whether EEPROM reloading is complete by inspecting the state
   of VR_EECSR_LOAD bit. This bit is self-cleared after the EEPROM
   reloading. Previously vr(4) blindly spins for 200us which may/may
   not enough to complete the EEPROM reload.
 o Removed if_mtu setup. It's done in ether_ifattach().
 o Use our own callout to drive watchdog timer.
 o In vr_attach disable further interrupts after reset. For VT6102 or
   newer hardwares, diable MII state change interrupt as well because
   mii state handling is done by mii layer.
 o Add more sane register initialization for VT6102 or newer chips.
    - Have NIC report error instead of retrying forever.
    - Let hardware detect MII coding error.
    - Enable MODE10T mode.
    - Enable memory-read-multiple for VT6107.
 o PHY address for VT6105 or newer chips is located at fixed address 1.
   For older chips the PHY address is stored in VR_PHYADDR register.
   Armed with these information, there is no need to re-read
   VR_PHYADDR register in miibus handler to get PHY address. This
   saves one register access cycle for each MII access.
 o Don't reprogram VR_PHYADDR register whenever access to a register
   located at a PHY address is made. Rhine fmaily allows reprogramming
   PHY address location via VR_PHYADDR register depending on
   VR_MIISTAT_PHYOPT bit of VR_MIISTAT register. This used to lead
   numerous phantom PHYs attached to miibus during phy probe phase and
   driver used to limit allowable PHY address in mii register accessors
   for certain chip revisions. This removes one more register access
   cycle for each MII access.
 o Correctly set VLAN header length.
 o bus_dma(9) conversion.
    - Limit DMA access to be in range of 32bit address space. Hardware
      doesn't support DAC.
    - Apply descriptor ring alignment requirements(16 bytes alignment)
    - Apply Rx buffer address alignment requirements(4 bytes alignment)
    - Apply Tx buffer address alignment requirements(4 bytes alignment)
      for Rhine I chip. Rhine II or III has no Tx buffer address
      alignment restrictions, though.
    - Reduce number of allowable number of DMA segments to 8.
    - Removed the atomic(9) used in descriptor ownership managements
      as it's job of bus_dmamap_sync(9).
    With these change vr(4) should work on all platforms.
 o Rhine uses two separated 8bits command registers to control Tx/Rx
   MAC. So don't access it as a single 16bit register.
 o For non-strict alignment architectures vr(4) no longer require
   time-consuming copy operation for received frames to align IP
   header. This greatly improves Rx performance on i386/amd64
   platforms. However the alignment is still necessary for
   strict-alignment platforms(e.g. sparc64). The alignment is handled
   in new fuction vr_fixup_rx().
 o vr_rxeof() now rejects multiple-segmented(fragmented) frames as
   vr(4) is not ready to handle this situation. Datasheet said nothing
   about the reason when/why it happens.
 o In vr_newbuf() don't set VR_RXSTAT_FIRSTFRAG/VR_RXSTAT_LASTFRAG
   bits as it's set by hardware.
 o Don't pass checksum offload information to upper layer for
   fragmented frames. The hardware assisted checksum is valid only
   when the frame is non-fragmented IP frames. Also mark the checksum
   is valid for corrupted frames such that upper layers doesn't need
   to recompute the checksum with software routine.
 o Removed vr_rxeoc(). RxDMA doesn't seem to need to be idle before
   sending VR_CMD_RX_GO command. Previously it used to stop RxDMA
   first which in turn resulted in long delays in Rx error recovery.
 o Rewrote Tx completion handler.
    - Always check VR_TXSTAT_OWN bit in status word prior to
      inspecting other status bits in the status word.
    - Collision counter updates were corrected as VT3071 or newer
      ones use different bits to notify collisions.
    - Unlike other chip revisions, VT86C100A uses different bit to
      indicate Tx underrun. For VT3071 or newer ones, check both
      VR_TXSTAT_TBUFF and VR_TXSTAT_UDF bits to see whether Tx
      underrun was happend. In case of Tx underrun requeue the failed
      frame and restart stalled Tx SM. Also double Tx DMA threshold
      size on each failure to mitigate future Tx underruns.
    - Disarm watchdog timer only if we have no queued packets,
      otherwise don't touch watchdog timer.
 o Rewrote interrupt handler.
    - status word in Tx/Rx descriptors indicates more detailed error
      state required to recover from the specific error. There is no
      need to rely on interrupt status word to recover from Tx/Rx
      error except PCI bus error. Other event notifications like
      statistics counter overflows or link state events will be
      handled in main interrupt handler.
    - Don't touch VR_IMR register if we are in suspend mode. Touching
      the register may hang the hardware if we are in suspended state.
      Previously it seems that touching VR_IMR register in interrupt
      handler was to work-around panic occurred in system shutdown
      stage on SMP systems. I think that work-around would hide
      root-cause of the panic and I couldn't reproduce the panic
      with multiple attempts on my box.
 o While padding space to meet minimum frame size, zero the pad data
   in order to avoid possibly leaking sensitive data.
 o Rewrote vr_start_locked().
    - Don't try to queue packets if number of available Tx descriptors
      are short than that of required one.
 o Don't reinitialize hardware whenever media configuration is
   changed. Media/link state changes are reported from mii layer if
   this happens and vr_link_task() will perform necessary changes.
 o Don't reinitialize hardware if only PROMISC bit was changed. Just
   toggle the PROMISC bit in hardware is sufficient to reflect the
   request.
 o Rearrganed the IFCAP_POLLING/IFCAP_HWCSUM handling in vr_ioctl().
 o Generate Tx completion interrupts for every VR_TX_INTR_THRESH-th
   frames. This reduces Tx completion interrupts under heavy network
   loads.
 o Since vr(4) doesn't request Tx interrupts for every queued frames,
   reclaim any pending descriptors not handled in Tx completion
   handler before actually firing up watchdog timeouts.
 o Added vr_tx_stop()/vr_rx_stop() to wait for the end of active
   TxDMA/RxDMA cycles(draining). These routines are used in vr_stop()
   to ensure sane state of MAC before releasing allocated Tx/Rx
   buffers. vr_link_task() also takes advantage of these functions to
   get to idle state prior to restarting Tx/Rx.
 o Added vr_tx_start()/vr_rx_start() to restart Rx/Tx. By separating
   Rx operation from Tx operation vr(4) no longer need to full-reset
   the hardware in case of Tx/Rx error recovery.
 o Implemented WOL.
 o Added VT6105M specific register definitions. VT6105M has the
   following hardware capabilities.
    - Tx/Rx IP/TCP/UDP checksum offload.
    - VLAN hardware tag insertion/extraction. Due to lack of information
       for getting extracted VLAN tag in Rx path, VLAN hardware support
       was not implemented yet.
    - CAM(Content Addressable Memory) based 32 entry perfect multicast/
      VLAN filtering.
    - 8 priority queues.
 o Implemented CAM based 32 entry perfect multicast filtering for
   VT6105M. If number of multicast entry is greater than 32, vr(4)
   uses traditional hash based filtering.
 o Reflect real Tx/Rx descriptor structure. Previously vr(4) used to
   embed other driver (private) data into these structure. This type
   of embedding make it hard to work on LP64 systems.
 o Removed unused vr_mii_frame structure and MII bit-baning
   definitions.
 o Added new PCI configuration registers that controls mii operation
   and mode selection.
 o Reduced number of Tx/Rx descriptors to 128 from 256. From my
   testing, increasing number of descriptors above than 64 didn't help
   increasing performance at all. Experimentations show 128 Rx
   descriptors seems to help a lot reducing Rx FIFO overruns under
   high system loads. It seems the poor Tx performance of Rhine
   hardwares comes from the limitation of hardware. You wouldn't
   satuarte the link with vr(4) no matter how fast CPU/large number of
   descriptors are used.
 o Added vr_statistics structure to hold various counter values.

No regression was reported but one variant of Rhine III(VT6105M)
found on RouterBOARD 44 does not work yet(Reported by Milan Obuch).
I hope this would be resolved in near future.

I'd like to say big thanks to Mike Tancsa who kindly donated a Rhine
hardware to me. Without his enthusiastic testing and feedbacks
overhauling vr(4) never have been possible. Also thanks to Masayuki
Murayama who provided some good comments on the hardware's internals.
This driver is result of combined effort of many users who provided
many feedbacks so I'd like to say special thanks to them.

Hardware donated by:	Mike Tancsa (mike AT sentex dot net)
Reviewed by:		remko (initial version)
Tested by:		Mike Tancsa(x86), JoaoBR ( joao AT matik DOT com DOT br )
			Marcin Wisnicki ( mwisnicki+freebsd AT gmail DOT com )
			Stefan Ehmann ( shoesoft AT gmx DOT net )
			Florian Smeets ( flo AT kasimir DOT com )
			Phil Oleson ( oz AT nixil DOT net )
			Larry Baird ( lab AT gta DOT com )
			Milan Obuch ( freebsd-current AT dino DOT sk )
			remko (initial version)
2008-03-11 04:51:22 +00:00
yongari
f82b08d40c Forced commit to note that vr(4) was repocopied from sys/pci
and modified for its new location.
2008-03-11 03:44:46 +00:00
yongari
d6d1923521 Fix function prototype for device_shutdown method. 2007-11-22 02:45:00 +00:00
yongari
e279fe58cf Not all VIA Rhine chips support 256 register space. So touching
VR_STICKHW register would result in unexpected results on these
hardwares. wpaul said the following for the issue.

  The vr_attach() routine unconditionally does this for all supported
  chips:

	/*
	 * Windows may put the chip in suspend mode when it
	 * shuts down. Be sure to kick it in the head to wake it
	 * up again.
	 */
	VR_CLRBIT(sc, VR_STICKHW, (VR_STICKHW_DS0|VR_STICKHW_DS1));

  The problem is, the VR_STICKHW register is not valid on all Rhine
  devices. The VT86C100A chip, which is present on the D-Link DFE-530TX
  boards, doesn't support power management, and its register space is
  only 128 bytes wide. The VR_STICKHW register offset falls outside this
  range. This may go unnoticed in most scenarios, but if you happen to have
  another PCI device in your system which is assigned the register
  space immediately after that of the Rhine, the vr(4) driver will
  incorrectly stomp it. In my case, the BIOS on my test board decided
  to put the register space for my PRO/100 ethernet board right next
  to the Rhine, and the Rhine driver ended up clobbering the IMR register
  of the PRO/100 device. (Long story short: the board kept locking up on
  boot. Took me the better part of the morning suss out why.)

  The strictly correct thing to do would be to check the PCI config space
  to make sure the device supports the power management capability and only
  write to the VR_STICKHW register if it does.

Instead of inspecting chip revision numbers for the availability of
VR_STICKHW register, check the existence of power management capability
of the hardware as wpaul suggested.

Reported by:	wpaul
Suggested by:	wpaul
OK'ed by:	jhb
2007-10-12 03:32:55 +00:00
phk
1c3ed182bc Add VLAN capability.
Submitted by:	Slawa Olhovchenkov <slw@zxy.spb.ru>
2007-04-23 12:19:02 +00:00
phk
c729a4c68d Remove the old software bit-banging MII interface, we started using
the Rhines shiftregisters in four years ago (1.60).
2007-04-22 15:58:56 +00:00
phk
ac1868addb Remove further cobwebs: Two layers of pointless substructures. 2007-04-22 15:48:29 +00:00
phk
db8dcec801 Initialize the physical next pointer in the tx descriptors when we
initialize instead of in the start routine.
2007-04-22 15:09:03 +00:00
phk
fc0fe76a27 Don't rename fields with #define.
Collapse two semantically identical structs.
Add missing vr_ prefix.
2007-04-22 14:57:05 +00:00
phk
1c813951d5 Run if_vr(4) through FlexeLint and clean some of the cobwebs found. 2007-04-22 12:55:36 +00:00
phk
b85dc1755d Add support for hw-assisted checksums on 6105M.
Sponsored by: Soekris Engineering
2007-04-17 22:59:54 +00:00
phk
f0a8f88e53 No need to throw tag+handle around on the stack. 2007-04-17 17:32:39 +00:00
phk
bb49ccc48c Improve the if_vr driver ever so slightly.
The 6105M and 6102 does not have the DWORD alignment problem, so
don't m_defrag() every packet in the transmit path for those.

More stringent usage of tx-descriptor ring and its flags.

Tested on 6102 and 6105M, other chips may also be able to run
without the m_defrag() but I have neither hardware nor docs to
find out.

Sponsored by:	Soekris Engineering
2007-04-17 12:23:57 +00:00
piso
6a2ffa86e5 o break newbus api: add a new argument of type driver_filter_t to
bus_setup_intr()

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current

Reviewed by: many
Approved by: re@
2007-02-23 12:19:07 +00:00
glebius
aeb9aeaa73 Consistently use if_printf() only in interface methods: if_start,
if_ioctl, if_watchdog, etc, or in functions that are used by
these methods only. In all other cases use device_printf().

This also fixes several panics, when if_printf() is called before
softc->ifp was initialized.

Submitted by:	Alex Lyashkov <umka sevcity.net>
2006-09-15 10:40:54 +00:00
glebius
fc987ed664 Do not touch ifp->if_baudrate in miibus aware drivers. 2006-02-14 12:44:56 +00:00
ru
f70f525b49 - Store pointer to the link-level address right in "struct ifnet"
rather than in ifindex_table[]; all (except one) accesses are
  through ifp anyway.  IF_LLADDR() works faster, and all (except
  one) ifaddr_byindex() users were converted to use ifp->if_addr.

- Stop storing a (pointer to) Ethernet address in "struct arpcom",
  and drop the IFP2ENADDR() macro; all users have been converted
  to use IF_LLADDR() instead.
2005-11-11 16:04:59 +00:00
jhb
6ce4d2f51a - Use callout_*() to manage the callout and make it MPSAFE.
- Fix locking in detach(), we only need to lock across vr_stop().

Tested by:	Mike Tancsa mike at sentex dot net
MFC after:	1 week
2005-10-31 21:37:27 +00:00
jhb
6034c52fb7 - Use if_printf() and device_printf() and remove vr_unit from the softc.
I had to initialize the ifnet a bit earlier in attach so that the
  if_printf()'s in vr_reset() didn't explode with a page fault.
- Use M_ZERO with contigmalloc() rather than an explicit bzero.
2005-10-27 21:18:37 +00:00
imp
8be6571405 Replace FreeBSD 3.x syntax (controller miibus0) with 4.x syntax
(device miibus) in time for 7.0 :-)
2005-10-22 05:06:55 +00:00
ru
b9c7add838 In detach method, move if_free() after bus_teardown_intr(). 2005-10-13 21:11:20 +00:00
glebius
9efbae40b7 - Don't pollute opt_global.h with DEVICE_POLLING and introduce
opt_device_polling.h
- Include opt_device_polling.h into appropriate files.
- Embrace with HAVE_KERNEL_OPTION_HEADERS the include in the files that
  can be compiled as loadable modules.

Reviewed by:	bde
2005-10-05 10:09:17 +00:00
glebius
f41a83bf42 Big polling(4) cleanup.
o Axe poll in trap.

o Axe IFF_POLLING flag from if_flags.

o Rework revision 1.21 (Giant removal), in such a way that
  poll_mtx is not dropped during call to polling handler.
  This fixes problem with idle polling.

o Make registration and deregistration from polling in a
  functional way, insted of next tick/interrupt.

o Obsolete kern.polling.enable. Polling is turned on/off
  with ifconfig.

Detailed kern_poll.c changes:
  - Remove polling handler flags, introduced in 1.21. The are not
    needed now.
  - Forget and do not check if_flags, if_capenable and if_drv_flags.
  - Call all registered polling handlers unconditionally.
  - Do not drop poll_mtx, when entering polling handlers.
  - In ether_poll() NET_LOCK_GIANT prior to locking poll_mtx.
  - In netisr_poll() axe the block, where polling code asks drivers
    to unregister.
  - In netisr_poll() and ether_poll() do polling always, if any
    handlers are present.
  - In ether_poll_[de]register() remove a lot of error hiding code. Assert
    that arguments are correct, instead.
  - In ether_poll_[de]register() use standard return values in case of
    error or success.
  - Introduce poll_switch() that is a sysctl handler for kern.polling.enable.
    poll_switch() goes through interface list and enabled/disables polling.
    A message that kern.polling.enable is deprecated is printed.

Detailed driver changes:
  - On attach driver announces IFCAP_POLLING in if_capabilities, but
    not in if_capenable.
  - On detach driver calls ether_poll_deregister() if polling is enabled.
  - In polling handler driver obtains its lock and checks IFF_DRV_RUNNING
    flag. If there is no, then unlocks and returns.
  - In ioctl handler driver checks for IFCAP_POLLING flag requested to
    be set or cleared. Driver first calls ether_poll_[de]register(), then
    obtains driver lock and [dis/en]ables interrupts.
  - In interrupt handler driver checks IFCAP_POLLING flag in if_capenable.
    If present, then returns.This is important to protect from spurious
    interrupts.

Reviewed by:	ru, sam, jhb
2005-10-01 18:56:19 +00:00
ru
d2f7ab28da Fix "struct ifnet" leaks when attach() fails in the middle, e.g.
when mii_phy_probe() or bus_setup_intr() fails.  For drivers that
call their detach() in this case, call if_free() there to cover
this case too.
2005-09-16 11:11:51 +00:00
rwatson
5d770a09e8 Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and
IFF_DRV_RUNNING, as well as the move from ifnet.if_flags to
ifnet.if_drv_flags.  Device drivers are now responsible for
synchronizing access to these flags, as they are in if_drv_flags.  This
helps prevent races between the network stack and device driver in
maintaining the interface flags field.

Many __FreeBSD__ and __FreeBSD_version checks maintained and continued;
some less so.

Reviewed by:	pjd, bz
MFC after:	7 days
2005-08-09 10:20:02 +00:00
rwatson
9918d13b80 Modify device drivers supporting multicast addresses to lock if_addr_mtx
over iteration of their multicast address lists when synchronizing the
hardware address filter with the network stack-maintained list.

Problem reported by:	Ed Maste (emaste at phaedrus dot sandvine dot ca>
MFC after:		1 week
2005-08-03 00:18:35 +00:00
brooks
567ba9b00a Stop embedding struct ifnet at the top of driver softcs. Instead the
struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
 - Struct arpcom is no longer referenced in normal interface code.
   Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
   To enforce this ac_enaddr has been renamed to _ac_enaddr.
 - The second argument to ether_ifattach is now always the mac address
   from driver private storage rather than sometimes being ac_enaddr.

Reviewed by:	sobomax, sam
2005-06-10 16:49:24 +00:00
nyan
0fce92f5c4 Remove bus_{mem,p}io.h and related code for a micro-optimization on i386
and amd64.  The optimization is a trivial on recent machines.

Reviewed by:	-arch (imp, marcel, dfr)
2005-05-29 04:42:30 +00:00
imp
b5521d6df7 Fix style(9) issues with __P removal.
Noticed by: bde
2005-02-24 22:33:05 +00:00
imp
ca4a8cf386 Return BUS_PROBE_DEFAULT instead of 0. 2005-02-24 21:32:56 +00:00
imp
f0bf889d0d /* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00
bms
586226b93c Forcibly disable interrupts, if we find ourselves servicing one when
the device is suspended or shutting down. This will need to be rethought
slightly if we implement suspend/resume support within vr(4).
This appears to fix the vr_shutdown() panic on SMP machines.

My theory here is there's a race somewhere during vr_detach() with
vr_intr() in the SMP case which was sometimes being triggered,
although quite why this was happening is unclear (vr_stop() also
explicitly disables interrupts by writing to the IMR register).

MFC-to-RELENG_5* candidate.

PR:		kern/62889
Tested by:	seb at struchtrup dot com
MFC after:	10 days
2004-10-27 19:02:23 +00:00