Commit Graph

22 Commits

Author SHA1 Message Date
Pedro F. Giffuni
df57947f08 spdx: initial adoption of licensing ID tags.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Initially, only tag files that use BSD 4-Clause "Original" license.

RelNotes:	yes
Differential Revision:	https://reviews.freebsd.org/D13133
2017-11-18 14:26:50 +00:00
Pyun YongHyeon
33a0d70b86 Disable jumbo frame support for PCIe VT6130/VT6132 controllers.
Quite contrary to VT6130 datasheet which says it supports up to 8K
jumbo frame, VT6130 does not seem to send jumbo frame that is
larger than 4K in length. Trying to send a frame that is larger
than 4K cause TX MAC hang.
Even though it's possible to allow 4K jumbo frame for VT6130, I
think it's meaningless to allow 4K jumbo frame. I'm not sure VT6132
also has the same limitation but I guess it uses the same MAC of
VT6130.
2009-12-20 19:45:46 +00:00
Pyun YongHyeon
564340e7cf VT6130 datasheet was wrong. If VT6130 receive a jumbo frame the
controller will split the jumbo frame into multiple RX buffers.
However it seems the hardware always dma the frame to 8 bytes
boundary for the split frames. Only the first part of the fragment
can have 4 byte alignment and subsequent buffers should be 8 bytes
aligned. Change RX buffer the alignment requirement to 8 bytes from
4 bytes.
2009-12-20 19:11:32 +00:00
Pyun YongHyeon
7fc94bc4e0 Add rudimentary WOL support. While I'm here remove enabling
busmastering/memory address in resume path. Bus driver will handle
that.
2009-12-18 22:14:28 +00:00
Pyun YongHyeon
dd77a0532b Remove unused member variable of softc. 2009-12-17 19:48:54 +00:00
Pyun YongHyeon
3b2b8afb3c Implement interrupt moderation scheme supported by VT61xx
controllers. TX/RX interrupt mitigation is controlled by
VGE_TXSUPPTHR and VGE_RXSUPPTHR register. These registers suppress
generation of interrupts until the programmed frames counter equals
to the registers. VT61xx also supports interrupt hold off timer
register. If this interrupt hold off timer is active all interrupts
would be disabled until the timer reaches to 0. The timer value is
reloaded whenever VGE_ISR register written. The timer resolution is
about 20us.

Previously vge(4) used single shot timer to reduce Tx completion
interrupts. This required VGE_CRS1 register access in Tx
start/completion handler to rearm new timeout value and it did not
show satisfactory result(more than 50k interrupts under load). Rx
interrupts was not moderated at all such that vge(4) used to
generate too many interrupts which in turn made polling(4) better
approach under high network load.

This change activates all interrupt moderation mechanism and
initial values were tuned to generate interrupt less than 8k per
second. That number of interrupts wouldn't add additional packet
latencies compared to polling(4). These interrupt parameters could
be changed with sysctl.
dev.vge.%d.int_holdoff
dev.vge.%d.rx_coal_pkt
dev.vge.%d.tx_coal_pkt
Interface has be brought down and up again before change take
effect.

With interrupt moderation there is no more need to loop in
interrupt handler. This loop always added one more register access.
While I'm here remove dead code which tried to implement subset of
interrupt moderation.
2009-12-17 18:00:25 +00:00
Pyun YongHyeon
ed03d795ff Remove unused VGE_ETHER_ALIGN definition. 2009-12-17 17:38:06 +00:00
Pyun YongHyeon
a931e5497b Add new flag VGE_FLAG_SUSPENDED to mark suspended state and
remove suspended member in softc.
2009-12-16 19:49:23 +00:00
Pyun YongHyeon
7129fb20d6 Add hardware MAC statistics support. This statistics could be
extracted from dev.vge.%d.stats sysctl node.
2009-12-16 19:41:40 +00:00
Pyun YongHyeon
623fa7184b Increase output queue size from 64 to 255. 2009-12-14 20:59:18 +00:00
Pyun YongHyeon
5957cc2a24 Add MSI support for VT613x controllers. 2009-12-14 20:49:50 +00:00
Pyun YongHyeon
643e9ee9fb Save PHY address by reading VGE_MIICFG register. For PCIe
controllers(VT613x), we assume the PHY address is 1.
Use the saved PHY address in MII register access routines and
remove accessing VGE_MIICFG register.
While I'm here save PCI express capability register which will be
used in near future.
2009-12-14 20:39:42 +00:00
Pyun YongHyeon
4d7235dd49 Introduce vge_flags member in softc. The vge_flags member will
record device specific bits. Remove vge_link and use vge_flags.
While here, move clearing link state before mii_mediachg() as
mii_mediachg() may affect link state.
2009-12-14 20:17:53 +00:00
Pyun YongHyeon
c3c74c6107 s/u_intXX_t/uintXX_t/g 2009-12-14 19:53:57 +00:00
Pyun YongHyeon
410f4c60ad Overhaul bus_dma(9) usage and fix various things.
o Separate TX/RX buffer DMA tag from TX/RX descriptor ring DMA tag.
 o Separate RX buffer DMA tag from common buffer DMA tag. RX DMA
   tag has different restriction compared to TX DMA tag.
 o Add 40bit DMA address support.
 o Adjust TX/RX descriptor ring alignment to 64 bytes from 256
   bytes as documented in datasheet.
 o Added check to ensure TX/RX ring reside within a 4GB boundary.
   Since TX/RX ring shares the same high address register they
   should have the same high address.
 o TX/RX side bus_dmamap_load_mbuf_sg(9) support.
 o Add lock assertion to vge_setmulti().
 o Add RX spare DMA map to recover from DMA map load failure.
 o Add optimized RX buffer handler, vge_discard_rxbuf which is
   activated when vge(4) sees bad frames.
 o Don't blindly update VGE_RXDESC_RESIDUECNT register. Datasheet
   says the register should be updated only when number of
   available RX descriptors are multiple of 4.
 o Use __NO_STRICT_ALIGNMENT instead of defining VGE_FIXUP_RX which
   is only set for i386 architecture. Previously vge(4) also
   performed expensive copy operation to align IP header on amd64.
   This change should give RX performance boost on amd64
   architecture.
 o Don't reinitialize controller if driver is already running. This
   should reduce number of link state flipping.
 o Since vge(4) drops a driver lock before passing received frame
   to upper layer, make sure vge(4) is still running after
   re-acquiring driver lock.
 o Add second argument count to vge_rxeof(). The argument will
   limit number of packets could be processed in RX handler.
 o Rearrange vge_rxeof() not to allocate RX buffer if received
   frame was bad packet.
 o Removed if_printf that prints DMA map failure. This type of
   message shouldn't be used in fast path of driver.
 o Reduce number of allowed TX buffer fragments to 6 from 7. A TX
   descriptor allows 7 fragments of a frame. However the CMZ field
   of descriptor has just 3bits and the controller wants to see
   fragment + 1 in the field. So if we have 7 fragments the field
   value would be 0 which seems to cause unexpected results under
   certain conditions. This change should fix occasional TX hang
   observed on vge(4).
 o Simplify vge_stat_locked() and add number of available TX
   descriptor check.
 o vge(4) controllers lack padding short frames. Make sure to fill
   zero for the padded bytes. This closes unintended information
   disclosure.
 o Don't set VGE_TDCTL_JUMBO flag. Datasheet is not clear whether
   this bit should be set by driver or write-back status bit after
   transmission. At least vendor's driver does not set this bit so
   remove it. Without this bit vge(4) still can send jumbo frames.
 o Don't start driver when vge(4) know there are not enough RX
   buffers.
 o Remove volatile keyword in RX descriptor structure. This should
   be handled by bus_dma(9).
 o Collapse two 16bits member of TX/RX descriptor into single 32bits
   member.
 o Reduce number of RX descriptors to 252 from 256. The
   VGE_RXDESCNUM is 16bits register but only lower 8bits are valid.
   So the maximum number of RX descriptors would be 255. However
   the number of should be multiple of 4 as controller wants to
   update 4 RX descriptors at a time. This limits the maximum
   number of RX descriptor to be 252.

Tested by:	Dewayne Geraghty (dewayne.geraghty <> heuristicsystems dot com dot au)
		Carey Jones (m.carey.jones <> gmail dot com)
		Yoshiaki Kasahara (kasahara <> nc dor kyushu-u dot ac dotjp)
2009-12-14 18:44:23 +00:00
John Baldwin
67e1dfa795 Several fixes to this driver:
- Overhaul the locking to avoid recursion and add missing locking in a few
  places.
- Don't schedule a task to call vge_start() from contexts that are safe to
  call vge_start() directly.  Just invoke the routine directly instead
  (this is what all of the other NIC drivers I am familiar with do).  Note
  that vge(4) does not use an interrupt filter handler which is the primary
  reason some other drivers use tasks.
- Add a new private timer to drive the watchdog timer instead of using
  if_watchdog and if_timer.
- Fixup detach by calling ether_ifdetach() before stopping the interface.
2009-11-19 19:35:15 +00:00
John Baldwin
dc8ecaacd4 Use the bus_*() routines rather than bus_space_*() for register operations. 2009-11-17 18:22:14 +00:00
John Baldwin
f1b211841d Use device_printf() and if_printf() instead of printf() with an explicit
unit number and remove 'unit' members from softc.
2009-11-06 14:52:37 +00:00
Brooks Davis
fc74a9f93a 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
Warner Losh
7ed5d5cc72 The PCI bus code saves/restores these config registers now. 2005-06-05 22:45:19 +00:00
Warner Losh
098ca2bda9 Start each of the license/copyright comments with /*-, minor shuffle of lines 2005-01-06 01:43:34 +00:00
Bill Paul
a07bd003bf Add device driver support for the VIA Networking Technologies
VT6122 gigabit ethernet chip and integrated 10/100/1000 copper PHY.
The vge driver has been added to GENERIC for i386, pc98 and amd64,
but not to sparc or ia64 since I don't have the ability to test
it there. The vge(4) driver supports VLANs, checksum offload and
jumbo frames.

Also added the lge(4) and nge(4) drivers to GENERIC for i386 and
pc98 since I was in the neighborhood. There's no reason to leave them
out anymore.
2004-09-10 20:57:46 +00:00