freebsd-dev/sys/pci
Pyun YongHyeon d65abd6663 Overhaul re(4).
o Increased number of Rx/Tx descriptors to 256 for 8169 GigEs
  because it's hard to push the hardware to the limit with default
  64 descriptors.
  TSO requires large number of Tx descriptors to pass a full sized
  TCP segment(65535 bytes IP packet) to hardware. Previously it
  consumed 32 Tx descriptors, assuming MCLBYTES DMA segment size,
  to send the TCP segment which means re(4) couldn't queue more
  than two full sized IP packets.
  For 8139C+ it still uses 64 Rx/Tx descriptors due to its hardware
  limitations. With this changes there are (very) small waste of
  memory for 8139C+ users but I don't think it would affect 8139C+
  users for most cases.
o Various bus_dma(9) fixes.
   - The hardware supports DAC so allow 64bit DMA operations.
   - Removed BUS_DMA_ALLOC_NOW flag.
   - Increased DMA segment size to 4096 from MCLBYTES because TSO
     consumes too many descriptors with MCLBYTES DMA segment size.
   - Tx/Rx side bus_dmamap_load_mbuf_sg(9) support. With these
     changes the code is more readable than previous one and got a
     (slightly) better performance as it doesn't need to pass/
     decode arguments to/from callback function.
   - Removed unnecessary callback function re_dmamap_desc() and
     nuked rl_dmaload_arg structure which was used in the callback.
   - Additional protection for DMA map load failure. In case of
     failure reuse current map instead of returning a bogus DMA
     map.
  -  Deferred DMA map unloading/sync operation for maximum
     performance until we really need to load new DMA map. If we
     happen to reuse current map(e.g. input error) there is no need
     to sync/unload/load again.
  -  The number of allowable Tx DMA segments for a mbuf chains are
     now 32 instead of magic nseg value. If the number of available
     Tx descriptors are short enough to send highly fragmented mbuf
     chains an optimized re_defrag() is called to collapse mbuf
     chains which is supposed to be much faster than m_defrag(9).
     re_defrag() was borrowed from ath(4).
   - Separated Rx/Tx DMA tag from a common DMA tag such that Rx DMA
     tag correctly uses DMA maps that were created with DMA alignment
     restriction(8bytes alignments). Tx DMA tag does not have such
     alignment limitation.
   - Added additional sanity checks for DMA ring map load failure.
   - Added additional spare Rx DMA map for graceful handling of Rx
     DMA map load failure.
   - Fixed misused bus_dmamap_sync(9) and added missing
     bus_dmamap_sync(9) in re_encap()/re_txeof()/re_rxeof().
o Enabled TSO again as re(4) have reasonable number of Tx
  descriptors.
o Don't touch DMA address of a Tx descriptor in re_txeof(). It's
  not needed.
o Fix incorrect update of if_ierrors counter. For Rx buffer
  shortage it should update if_qdrops as the buffer is reused.
o Added checks for unsupported H/W revisions and return ENXIO for
  these hardwares. This is required to remove resource allocation
  code in re_probe as other drivers do in device probe routine.
o Modified descriptor index manipulation macros as it's now possible
  to have different number of descriptors for Rx/Tx.
o In re_start, to save a lock operation, use IFQ_DRV_IS_EMPTY before
  trying to invoke IFQ_DRV_DEQUEUE. Also don't blindly call re_encap
  since we already know the number of available Tx descriptors in
  advance.
o Removed RL_TX_DESC_THLD which was used to reserve RL_TX_DESC_THLD
  descriptors in Tx path. There is no such a limitation mentioned in
  8139C+/8169/8110/8168/8101/8111 datasheet and it seems to work ok
  without reserving RL_TX_DESC_THLD descriptors.
o Fix a comment for RL_GTXSTART. The register is 8bits register.
o Added comments for 8169/8139C+ hardware restrictions on descriptors.
o Removed forward declaration for "struct rl_softc", it's not needed.
o Added a new structure rl_txdesc for Tx descriptor managements and
  a structure rl_rxdesc for Rx descriptor managements.
o Removed unused member variable rl_intlock in driver softc. There are
  still several unused member variables which are supposed to be used
  to access hardware statistics counters. But it seems that accessing
  hardware counters were not implemented yet.
2008-01-15 01:10:31 +00:00
..
alpm.c Various updates to most of the smbus(4) drivers: 2007-01-11 19:56:24 +00:00
amdpm.c Various updates to most of the smbus(4) drivers: 2007-01-11 19:56:24 +00:00
amdsmb.c Various updates to most of the smbus(4) drivers: 2007-01-11 19:56:24 +00:00
if_mn.c Catchup with filters 2007-02-23 19:41:34 +00:00
if_pcn.c o break newbus api: add a new argument of type driver_filter_t to 2007-02-23 12:19:07 +00:00
if_pcnreg.h - Clear the PCN_MISC_ASEL bit so the media port can be actually set 2006-11-28 01:33:17 +00:00
if_rl.c Add the FNW3603TX Planex NIC. 2007-11-26 18:25:07 +00:00
if_rlreg.h Overhaul re(4). 2008-01-15 01:10:31 +00:00
if_sf.c Fix function prototype for device_shutdown method. 2007-11-22 02:45:00 +00:00
if_sfreg.h Whitespace nits. 2006-09-15 11:01:23 +00:00
if_sis.c Convert sis(4) to use its own watchdog procedure. 2007-02-24 14:27:36 +00:00
if_sisreg.h Convert sis(4) to use its own watchdog procedure. 2007-02-24 14:27:36 +00:00
if_ste.c Fix function prototype for device_shutdown method. 2007-11-22 02:45:00 +00:00
if_stereg.h Add new ST201 PCI id. 2007-03-10 03:10:34 +00:00
if_tl.c tl(4) appears to support long frames. 2007-05-09 09:02:11 +00:00
if_tlreg.h Whitespace nits. 2006-09-15 11:01:23 +00:00
if_vr.c Fix function prototype for device_shutdown method. 2007-11-22 02:45:00 +00:00
if_vrreg.h Add VLAN capability. 2007-04-23 12:19:02 +00:00
if_wb.c Spelling fix for interupt -> interrupt 2007-10-12 06:03:46 +00:00
if_wbreg.h Whitespace nits. 2006-09-15 11:01:23 +00:00
if_xl.c Fix function prototype for device_shutdown method. 2007-11-22 02:45:00 +00:00
if_xlreg.h - Use the xl_stats_update() callout instead of if_slowtimo() for 2006-12-06 02:18:41 +00:00
intpm.c Oops, convert a tsleep() to a msleep() that was missed when adding locking 2007-10-15 16:18:20 +00:00
intpmreg.h Various updates to most of the smbus(4) drivers: 2007-01-11 19:56:24 +00:00
locate.pl
ncr.c Prepare for future integration between CAM and newbus. xpt_bus_register 2007-06-17 05:55:54 +00:00
ncrreg.h Fix typos from previous commit. 2005-01-07 05:01:24 +00:00
nfsmb.c Add SMB support for the MCP61 chipset. 2007-11-10 17:12:08 +00:00
viapm.c Add the device ID for the VIA CX700 chipset. 2007-08-02 04:29:19 +00:00