linux-toradex.git/drivers/ntb/ntb_transport.c, branch v3.14.42 Linux kernel for Apalis and Colibri modules Merge tag 'ntb-3.13' of git://github.com/jonmason/ntb 2013-11-26T19:15:12+00:00 Linus Torvalds torvalds@linux-foundation.org 2013-11-26T19:15:12+00:00 b95485143b271df65ce7c6ba75daee324ee6f517 Pull non-transparent bridge updates from Jon Mason: "NTB driver bug fixes to address a missed call to pci_enable_msix, NTB-RP Link Up issue, Xeon Doorbell errata workaround, ntb_transport link down race, and correct dmaengine_get/put usage. Also, clean-ups to remove duplicate defines and document a hardware errata. Finally, some changes to improve performance" * tag 'ntb-3.13' of git://github.com/jonmason/ntb: NTB: Disable interrupts and poll under high load NTB: Enable Snoop on Primary Side NTB: Document HW errata NTB: remove duplicate defines NTB: correct dmaengine_get/put usage NTB: Fix ntb_transport link down race ntb: Fix missed call to pci_enable_msix() NTB: Fix NTB-RP Link Up NTB: Xeon Doorbell errata workaround 
Pull non-transparent bridge updates from Jon Mason:
 "NTB driver bug fixes to address a missed call to pci_enable_msix,
  NTB-RP Link Up issue, Xeon Doorbell errata workaround, ntb_transport
  link down race, and correct dmaengine_get/put usage.

  Also, clean-ups to remove duplicate defines and document a hardware
  errata.  Finally, some changes to improve performance"

* tag 'ntb-3.13' of git://github.com/jonmason/ntb:
  NTB: Disable interrupts and poll under high load
  NTB: Enable Snoop on Primary Side
  NTB: Document HW errata
  NTB: remove duplicate defines
  NTB: correct dmaengine_get/put usage
  NTB: Fix ntb_transport link down race
  ntb: Fix missed call to pci_enable_msix()
  NTB: Fix NTB-RP Link Up
  NTB: Xeon Doorbell errata workaround
NTB: Disable interrupts and poll under high load 2013-11-20T16:57:34+00:00 Jon Mason jon.mason@intel.com 2013-04-19T00:59:44+00:00 e8aeb60c389c2aa48d345bcf717f8cb7edf67680 Disable interrupts and poll under high load Signed-off-by: Jon Mason <jon.mason@intel.com> 
Disable interrupts and poll under high load

Signed-off-by: Jon Mason <jon.mason@intel.com>
NTB: correct dmaengine_get/put usage 2013-11-20T16:57:32+00:00 Jon Mason jon.mason@intel.com 2013-11-19T16:34:47+00:00 94681194e667c33ba303f1225814197594cbfc34 dmaengine_get() causes the initialization of the per-cpu channel tables. It needs to be called prior to dma_find_channel(). Initial version by Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jon Mason <jon.mason@intel.com> 
dmaengine_get() causes the initialization of the per-cpu channel tables.
It needs to be called prior to dma_find_channel().

Initial version by Dan Williams <dan.j.williams@intel.com>

Signed-off-by: Jon Mason <jon.mason@intel.com>
NTB: Fix ntb_transport link down race 2013-11-20T16:57:32+00:00 Jon Mason jon.mason@intel.com 2013-09-09T20:39:55+00:00 fca4d5188c1123ff63205e35e2c5f551a21d30c4 A WARN_ON is being hit in ntb_qp_link_work due to the NTB transport link being down while the ntb qp link is still active. This is caused by the transport link being brought down prior to the qp link worker thread being terminated. To correct this, shutdown the qp's prior to bringing the transport link down. Also, only call the qp worker thread if it is in interrupt context, otherwise call the function directly. Signed-off-by: Jon Mason <jon.mason@intel.com> 
A WARN_ON is being hit in ntb_qp_link_work due to the NTB transport link
being down while the ntb qp link is still active.  This is caused by the
transport link being brought down prior to the qp link worker thread
being terminated.  To correct this, shutdown the qp's prior to bringing
the transport link down.  Also, only call the qp worker thread if it is
in interrupt context, otherwise call the function directly.

Signed-off-by: Jon Mason <jon.mason@intel.com>
dmaengine: remove DMA unmap flags 2013-11-14T19:04:38+00:00 Bartlomiej Zolnierkiewicz b.zolnierkie@samsung.com 2013-10-18T17:35:33+00:00 0776ae7b89782124ddd72eafe0b1e0fdcdabe32e Remove no longer needed DMA unmap flags: - DMA_COMPL_SKIP_SRC_UNMAP - DMA_COMPL_SKIP_DEST_UNMAP - DMA_COMPL_SRC_UNMAP_SINGLE - DMA_COMPL_DEST_UNMAP_SINGLE Cc: Vinod Koul <vinod.koul@intel.com> Cc: Tomasz Figa <t.figa@samsung.com> Cc: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Jon Mason <jon.mason@intel.com> Acked-by: Mark Brown <broonie@linaro.org> [djbw: clean up straggling skip unmap flags in ntb] Signed-off-by: Dan Williams <dan.j.williams@intel.com> 
Remove no longer needed DMA unmap flags:
- DMA_COMPL_SKIP_SRC_UNMAP
- DMA_COMPL_SKIP_DEST_UNMAP
- DMA_COMPL_SRC_UNMAP_SINGLE
- DMA_COMPL_DEST_UNMAP_SINGLE

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Jon Mason <jon.mason@intel.com>
Acked-by: Mark Brown <broonie@linaro.org>
[djbw: clean up straggling skip unmap flags in ntb]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
NTB: convert to dmaengine_unmap_data 2013-11-14T19:01:32+00:00 Bartlomiej Zolnierkiewicz b.zolnierkie@samsung.com 2013-10-18T17:35:31+00:00 6f57fd0578dff23a4bd16118f0cb4201bcec91f1 Use the generic unmap object to unmap dma buffers. Cc: Vinod Koul <vinod.koul@intel.com> Cc: Tomasz Figa <t.figa@samsung.com> Cc: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Jon Mason <jon.mason@intel.com> [djbw: fix up unmap len, and GFP flags] Signed-off-by: Dan Williams <dan.j.williams@intel.com> 
Use the generic unmap object to unmap dma buffers.

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Jon Mason <jon.mason@intel.com>
[djbw: fix up unmap len, and GFP flags]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
NTB: Comment Fix 2013-09-05T18:08:00+00:00 Jon Mason jon.mason@intel.com 2013-07-29T23:46:43+00:00 f9a2cf890b8e6c0a4ce510593f6f3c58394dbcae Add "data" ntb_register_db_callback parameter description comment and correct poor spelling. Signed-off-by: Jon Mason <jon.mason@intel.com> 
Add "data" ntb_register_db_callback parameter description comment and
correct poor spelling.

Signed-off-by: Jon Mason <jon.mason@intel.com>
NTB: Remove unused variable 2013-09-05T18:07:59+00:00 Jon Mason jon.mason@intel.com 2013-09-03T21:38:19+00:00 3daa3a073e8813e4185d614f2c6b601ce39e2e5f Remove unused pci_dev variable from ntb_transport_free() Signed-off-by: Jon Mason <jon.mason@intel.com> 
Remove unused pci_dev variable from ntb_transport_free()

Signed-off-by: Jon Mason <jon.mason@intel.com>
NTB: Rename Variables for NTB-RP 2013-09-05T18:07:58+00:00 Jon Mason jon.mason@intel.com 2013-07-15T22:53:54+00:00 497938890a0121d040683aa1db42cad8daf7ae97 Many variable names in the NTB driver refer to the primary or secondary side. However, these variables will be used to access the reverse case when in NTB-RP mode. Make these names more generic in anticipation of NTB-RP support. Signed-off-by: Jon Mason <jon.mason@intel.com> 
Many variable names in the NTB driver refer to the primary or secondary
side.  However, these variables will be used to access the reverse case
when in NTB-RP mode.  Make these names more generic in anticipation of
NTB-RP support.

Signed-off-by: Jon Mason <jon.mason@intel.com>
NTB: Use DMA Engine to Transmit and Receive 2013-09-05T18:04:09+00:00 Jon Mason jon.mason@intel.com 2013-02-12T16:52:50+00:00 282a2feeb9bfb1d1dfbad93df206b74eaf80d564 Allocate and use a DMA engine channel to transmit and receive data over NTB. If none is allocated, fall back to using the CPU to transfer data. Signed-off-by: Jon Mason <jon.mason@intel.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> 
Allocate and use a DMA engine channel to transmit and receive data over
NTB.  If none is allocated, fall back to using the CPU to transfer data.

Signed-off-by: Jon Mason <jon.mason@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>