[RFC PATCH 00/11] Introduce a test for continuous transfer

[Shunsuke Mie]

This patchset introduces testing through continuous transfer to the PCI
endpoint tests. The purpose is to find bugs that may exist in the endpoint
controller driver. This changes able to find bugs in the DW EDMA driver and
this patchset includes the fix.

This bug does not appear in the current tests because these synchronize to
finish with every data transfer. However, the problem occurs with
continuous DMA issuances. The continuous transfers are required to get high
throughput and low latency. Therefore, the added tests will enable
realistic transfer testing.

This patchset is divided into three parts:
- Remove duplicated definitions and improve some code [1-6/11]
- Add continuous transfer tests [7-9/11]
- Fix for the DW EDMA driver bug [10,11/11]

This patchset has beed tested on RCar Spidar that has dw pci edma chip.

Shunsuke Mie (11):
  misc: pci_endpoint_test: Aggregate irq_type checking
  misc: pci_endpoint_test: Remove an unused variable
  pci: endpoint: function/pci-epf-test: Unify a range of time
    measurement
  PCI: endpoint: functions/pci-epf-test: Move common difinitions to
    header file
  MAINTAINERS: Add a header file for pci-epf-test
  misc: pci_endpoint_test: Use a common header file between endpoint
    driver
  PCI: endpoint: functions/pci-epf-test: Extend the test for continuous
    transfers
  misc: pci_endpoint_test: Support a test of continuous transfer
  tools: PCI: Add 'C' option to support continuous transfer
  dmaengine: dw-edma: Fix to change for continuous transfer
  dmaengine: dw-edma: Fix to enable to issue dma request on DMA
    processing

 MAINTAINERS                                   |   1 +
 drivers/dma/dw-edma/dw-edma-core.c            |  30 ++-
 drivers/misc/pci_endpoint_test.c              | 132 ++++--------
 drivers/pci/endpoint/functions/pci-epf-test.c | 199 ++++++++----------
 include/linux/pci-epf-test.h                  |  67 ++++++
 include/uapi/linux/pcitest.h                  |   1 +
 tools/pci/pcitest.c                           |  13 +-
 7 files changed, 231 insertions(+), 212 deletions(-)
 create mode 100644 include/linux/pci-epf-test.h

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2.25.1