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Commit Graph

26 Commits

Author SHA1 Message Date
Pyun YongHyeon
443f331ec5 Fix another bug introduced in r212109. We should unload DMA maps
only after sending the last fragment of a frame so the mbuf pointer
also should be stored in the last descriptor index.
2010-09-03 18:00:17 +00:00
Pyun YongHyeon
0af3989be9 Initial WOL support. NS DP8315 was tested but SiS900/SiS7016 was
not tested.
While I'm here, clean up SIOCSIFCAP handler.
2010-09-03 00:34:45 +00:00
Pyun YongHyeon
7968da57dc Implement initial device suspend/resume method. 2010-09-02 22:37:13 +00:00
Pyun YongHyeon
94222398d1 Unlike most other controllers, NS DP83815/DP83816 controllers seem
to pad with 0xFF when it encounter short frames.  According to RFC
1042 the pad bytes should be 0x00.
Because manual padding consumes extra CPU cycles, introduce a new
tunable which controls the padding behavior. Turning this tunable
on will have driver pad manually but it's disabled by default. Users
can enable software padding by setting the following tunable to
non-zero value.

dev.sis.%d.manual_pad="1"

PR:	kern/35422 (patch not used)
2010-09-02 18:10:11 +00:00
Pyun YongHyeon
74e8a3238f Fix the last endianness issue on handling station address which
prevented driver from working on big-endian machines. Also rewrite
station address programming to make it work on strict-alignment
architectures. With this change, sis(4) now works on sparc64 and
performance number looks good even though sis(4) have to apply
fixup code to align received frames on 2 bytes boundary on sparc64.
2010-09-02 17:51:41 +00:00
Pyun YongHyeon
8c6cd8631f Fix stupid error in r212109 which didn't swap DMA maps. This caused
IOMMU panic on sparc64 under high TX load.
2010-09-02 00:44:05 +00:00
Pyun YongHyeon
7723fa2e04 Move sis_reset() to sis_initl(). This ensures driver starts with
known good state of controller.
2010-09-01 22:50:11 +00:00
Pyun YongHyeon
d199ef7e0d Avoid controller reinitialization which could be triggered by
dhclient(8) or alias addresses are added.

PR:	kern/87506
2010-09-01 22:16:25 +00:00
Pyun YongHyeon
ae9e8d4935 Do not reinitialize controller whenever promiscuous mode or
allmulti is toggled. Controller does not require reinitialization.
This removes unnecessary controller reinitialization whenever
tcpdump is used.
While I'm here remove unnecessary variable reinitialization.
2010-09-01 22:08:23 +00:00
Pyun YongHyeon
fc58ee15ff Report result of link state change to caller. Previously it always
returned success.
2010-09-01 21:44:36 +00:00
Pyun YongHyeon
d7b57e79e5 Overhaul link state change handling. Previously sis(4) blindly
configured TX/RX MACs before getting a valid link. After that, when
link state change callback is called, it called device
initialization again to reconfigure TX/RX MACs depending on
resolved link state. This hack created several bad side effects and
it required more hacks to not collide with sis_tick callback as
well as disabling switching to currently selected media in device
initialization. Also it seems sis(4) was used to be a template
driver for long time so other drivers which was modeled after
sis(4) also should be changed.

TX/RX MACs are now reconfigured after getting a valid link. Fix for
short cable error is also applied after getting a link because it's
only valid when the resolved speed is 100Mbps.

While I'm here slightly reorganize interrupt handler such that
sis(4) always read SIS_ISR register to see whether the interrupt is
ours or not. This change removes another hack and make it possible
to nuke sis_stopped variable in softc.
2010-09-01 21:42:19 +00:00
Pyun YongHyeon
91c265b83d s/u_intXX_t/uintXX_t/g 2010-09-01 19:53:15 +00:00
Pyun YongHyeon
a629f2b183 bus_dma(9) cleanup.
o Enforce TX/RX descriptor ring alignment. NS data sheet says the
   controller needs 4 bytes alignment but use 16 to cover both SiS
   and NS controllers. I don't have SiS data sheet so I'm not sure
   what is alignment restriction of SiS controller but 16 would be
   enough because it's larger than the size of a TX/RX descriptor.
   Previously sis(4) ignored the alignment restriction.
 o Enforce RX buffer alignment, 4.
   Previously sis(4) ignored RX buffer alignment restriction.
 o Limit number of TX DMA segment to be used to 16. It seems
   controller has no restriction on number of DMA segments but
   using more than 16 looks resource waste.
 o Collapse long mbuf chains with m_collapse(9) instead of calling
   expensive m_defrag(9).
 o TX/RX side bus_dmamap_load_mbuf_sg(9) support and remove
   unnecessary callbacks.
 o Initial endianness support.
 o Prefer local alignment fixup code to m_devget(9).
 o Pre-allocate TX/RX mbuf DMA maps instead of creating/destroying
   these maps in fast TX/RX path. On non-x86 architectures, this is
   very expensive operation and there is no need to do that.
 o Add missing bus_dmamap_sync(9) in TX/RX path.
 o watchdog is now unarmed only when there are no pending frames
   on controller. Previously sis(4) blindly unarmed watchdog
   without checking the number of queued frames.
 o For efficiency, loaded DMA map is reused for error frames.
 o DMA map loading failure is now gracefully handled. Previously
   sis(4) ignored any DMA map loading errors.
 o Nuke unused macros which are not appropriate for endianness
   operation.
 o Stop embedding driver maintained structures into descriptor
   rings. Because TX/RX descriptor structures are shared between
   host and controller, frequent bus_dmamap_sync(9) operations are
   required in fast path. Embedding driver structures will increase
   the size of DMA map which in turn will slow down performance.
2010-09-01 19:33:40 +00:00
Pyun YongHyeon
1d885b48c1 Nuke unnecessary return at the end of function. 2010-09-01 18:41:59 +00:00
Pyun YongHyeon
cc26c0fd68 style(9) - space after keywords. 2010-09-01 18:39:35 +00:00
Pyun YongHyeon
8eca70be71 Remove leading and trailing white spaces.
No functional changes.
2010-09-01 18:28:08 +00:00
Rebecca Cran
62592d9173 It's not necessary to reset the chip every time an input overflow event
occurs. In addition, the delay when programming the short cable fix
should be 100us, not 100ms.

PR:	kern/64556
Submitted by:	Thomas Hurst <tom at hur.st>
Approved by:	rrs (mentor)
MFC after:	1 week
2010-04-20 19:30:12 +00:00
Robert Watson
eb956cd041 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 Rao
1abcdbd127 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
Pyun YongHyeon
53414a48f8 Receving VLAN oversized frames raise SIS_ISR_RX_ERR interrupt, so
make sis_rxeof() handle that too. Previously it used to receive the
frame and reset controller.

PR:	kern/131414
2009-02-13 02:08:20 +00:00
Warner Losh
e436c38238 Fix shutdown prototypes. 2009-02-10 23:17:20 +00:00
Pyun YongHyeon
92483efaab Fix a long standing VLAN tagged frame handling bug.
When VLAN tagged frame is received the hardware sets 'LONG' bit of
Rx status word. It is always set when the size of received frame
exceeded 1518 bytes, including CRC. This VLAN tagged frame clears
'OK' bit of Rx status word such that driver should not rely on 'OK'
bit of Rx status word to pass the VLAN tagged frame to upper stack.

To fix the bug, don't use SIS_CMDSTS_PKT_OK for Rx error check and
introduce SIS_RXSTAT_ERROR macro that checks Rx errors. If we are
configured to accept VLAN tagged frames and the received frame size
is less than or equal to maximum allowed length of VLAN tagged
frame, clear 'LONG' bit of Rx status word before checking Rx
errors.

Reported by:	Vladimir Ermako	< samflanker <> gmail DOT com >
Tested by:	Vladimir Ermako	< samflanker <> gmail DOT com >
2008-12-09 04:30:47 +00:00
Warner Losh
3106346290 There actually were bugs in the original handling that I missed last
night.

Free the children after each pci bus that is searched.  Otherwise we
leak them.  With free in the new place, we also have to free children
before going to done when we find the device we're looking for.

Also, if we can't get the children of a device, just ignore that bus.
2008-08-23 15:34:31 +00:00
Warner Losh
83bda63e3e Actually revert last... Upon closer inspection the code works in the
face of errors already...  A bit unorthodox, but none-the-less valid.
2008-08-23 07:43:03 +00:00
Warner Losh
b52943f026 Handle errors in device_get_children gracefully. 2008-08-23 07:41:21 +00:00
Warner Losh
d2155f2f19 Move sis to sys/dev/sis for consistency. 2008-08-10 10:00:14 +00:00