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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-21 09:46:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-21 09:46:59 -0700 |
| commit | bec5545edef658f81cd9721dbe8fbebeb3c7534d (patch) | |
| tree | 42aec8714bbbf85ecf66609c7ea9ff0c6a89dcf3 /Documentation | |
| parent | f1a3b43cc1f50c6ee5ba582f2025db3dea891208 (diff) | |
| parent | d9c53aa440b332059f7f0ce3f7868ff1dc58c62c (diff) | |
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
...
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/driver-api/ntb.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/driver-api/ntb.rst b/Documentation/driver-api/ntb.rst index 074a423c853c..87d1372da879 100644 --- a/Documentation/driver-api/ntb.rst +++ b/Documentation/driver-api/ntb.rst @@ -200,6 +200,33 @@ Debugfs Files: This file is used to read and write peer scratchpads. See *spad* for details. +NTB MSI Test Client (ntb\_msi\_test) +------------------------------------ + +The MSI test client serves to test and debug the MSI library which +allows for passing MSI interrupts across NTB memory windows. The +test client is interacted with through the debugfs filesystem: + +* *debugfs*/ntb\_tool/*hw*/ + A directory in debugfs will be created for each + NTB device probed by the tool. This directory is shortened to *hw* + below. +* *hw*/port + This file describes the local port number +* *hw*/irq*_occurrences + One occurrences file exists for each interrupt and, when read, + returns the number of times the interrupt has been triggered. +* *hw*/peer*/port + This file describes the port number for each peer +* *hw*/peer*/count + This file describes the number of interrupts that can be + triggered on each peer +* *hw*/peer*/trigger + Writing an interrupt number (any number less than the value + specified in count) will trigger the interrupt on the + specified peer. That peer's interrupt's occurrence file + should be incremented. + NTB Hardware Drivers ==================== |