Commit Graph

6 Commits

Author SHA1 Message Date
Linus Torvalds bec5545ede New feature to add support for NTB virtual MSI interrupts, the ability
to test and use this feature in the NTB transport layer.  Also, bug
 fixes for the AMD and Switchtec drivers, as well as some general
 patches.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEoE9b9c3U2JxX98mqbmZLrHqL0iMFAl0w0EwACgkQbmZLrHqL
 0iNt4RAAiw2Cb2y5D36jI+lPl8xN2REk4x7b/FKFfLSzM/7Bu1okprrElKO6735r
 0wRpyZS5lbYYr0QybzMrNfDMLYywFmA+C7GY7gQpR7GLYLb9chmvOmubfEbakHYI
 4qKAWgaZt6PaiLQp76y3bFjUiBrd8KzVi5J891lDKvjzsGUjdNeFSlPlDbzTP8H9
 +pBxnYn4G7MxVTebxjpOs6bQPO1sJZl4cyW40avTC1x+6bMlU1B361IhwtuabQH8
 6rq6MQbaDzHTpuBZqZR8O+JxFzpffnGRu+smWPNQS2p95AewGIaDUsjZ6ph81rF1
 mUxt/UJYP0RlIY+RQQ0Ie3cBUZ/I7wQzpFAXnqb8Nzba4tpc9ITX04hfnWKg6Kr0
 sgj2Ro6I4TS3TSw6vquwvR2hn6+RZi06z/D0AXdUl+R3QxJXMyZygDDPDpTImZNy
 cnu+1Y7pdgjASXBvHKhM39+ynGLGze7xBIs6GO6TjJoVgZdMaW1/N/wsldYRc3Uf
 K0VSHowGHOyIV8d33oYWK2oSgWFrRCCanrCXIltNwl6NM05/b474L/8fiSnJ37PZ
 dJspdPdrut9W3018cRVHBhAX9csucbSa46FKz1Z0FEFjDJJzqy0isKDsoExBZqBH
 AqCnP548sbJF9+yOC475W36KMHBhyNvLS8XxD2J3DQpPDMRj//Y=
 =P1lR
 -----END PGP SIGNATURE-----

Merge tag 'ntb-5.3' of git://github.com/jonmason/ntb

Pull NTB updates from Jon Mason:
 "New feature to add support for NTB virtual MSI interrupts, the ability
  to test and use this feature in the NTB transport layer.

  Also, bug fixes for the AMD and Switchtec drivers, as well as some
  general patches"

* tag 'ntb-5.3' of git://github.com/jonmason/ntb: (22 commits)
  NTB: Describe the ntb_msi_test client in the documentation.
  NTB: Add MSI interrupt support to ntb_transport
  NTB: Add ntb_msi_test support to ntb_test
  NTB: Introduce NTB MSI Test Client
  NTB: Introduce MSI library
  NTB: Rename ntb.c to support multiple source files in the module
  NTB: Introduce functions to calculate multi-port resource index
  NTB: Introduce helper functions to calculate logical port number
  PCI/switchtec: Add module parameter to request more interrupts
  PCI/MSI: Support allocating virtual MSI interrupts
  ntb_hw_switchtec: Fix setup MW with failure bug
  ntb_hw_switchtec: Skip unnecessary re-setup of shared memory window for crosslink case
  ntb_hw_switchtec: Remove redundant steps of switchtec_ntb_reinit_peer() function
  NTB: correct ntb_dev_ops and ntb_dev comment typos
  NTB: amd: Silence shift wrapping warning in amd_ntb_db_vector_mask()
  ntb_hw_switchtec: potential shift wrapping bug in switchtec_ntb_init_sndev()
  NTB: ntb_transport: Ensure qp->tx_mw_dma_addr is initaliazed
  NTB: ntb_hw_amd: set peer limit register
  NTB: ntb_perf: Clear stale values in doorbell and command SPAD register
  NTB: ntb_perf: Disable NTB link after clearing peer XLAT registers
  ...
2019-07-21 09:46:59 -07:00
Logan Gunthorpe a6bed7a541 NTB: Introduce NTB MSI Test Client
Introduce a tool to test NTB MSI interrupts similar to the other
NTB test tools. This tool creates a debugfs directory for each
NTB device with the following files:

port
irqX_occurrences
peerX/port
peerX/count
peerX/trigger

The 'port' file tells the user the local port number and the
'occurrences' files tell the number of local interrupts that
have been received for each interrupt.

For each peer, the 'port' file and the 'count' file tell you the
peer's port number and number of interrupts respectively. Writing
the interrupt number to the 'trigger' file triggers the interrupt
handler for the peer which should increment their corresponding
'occurrences' file. The 'ready' file indicates if a peer is ready,
writing to this file blocks until it is ready.

The module parameter num_irqs can be used to set the number of
local interrupts. By default this is 4. This is only limited by
the number of unused MSI interrupts registered by the hardware
(this will require support of the hardware driver) and there must
be at least 2*num_irqs + 1 spads registers available.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Allen Hubbe <allenbh@gmail.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
2019-06-13 09:02:51 -04:00
Thomas Gleixner ec8f24b7fa treewide: Add SPDX license identifier - Makefile/Kconfig
Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 10:50:46 +02:00
Dave Jiang 8a7b6a778a ntb: ntb perf tool
Providing raw performance data via a tool that directly access data from
NTB w/o any software overhead. This allows measurement of the hardware
performance limit. In revision one we are only doing single direction
CPU and DMA writes. Eventually we will provide bi-directional writes.

The measurement using DMA engine for NTB performance measure does
not measure the raw performance of DMA engine over NTB due to software
overhead. But it should provide the peak performance through the Linux DMA
driver.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Tested-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-01-17 22:08:05 -05:00
Allen Hubbe 578b881ba9 NTB: Add tool test client
This is a simple debugging driver that enables the doorbell and
scratch pad registers to be read and written from the debugfs.  This
tool enables more complicated debugging to be scripted from user space.
This driver may be used to test that your ntb hardware and drivers are
functioning at a basic level.

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
2015-07-04 14:08:17 -04:00
Allen Hubbe 963de4739f NTB: Add ping pong test client
This is a simple ping pong driver that exercises the scratch pads and
doorbells of the ntb hardware.  This driver may be used to test that
your ntb hardware and drivers are functioning at a basic level.

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
2015-07-04 14:07:42 -04:00