[PATCH v4 00/17] PCI endpoint fixes and improvements

From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
To: Bjorn Helgaas <bhelgaas@google.com>, linux-pci@vger.kernel.org
Cc: "Rick Wertenbroek" <rick.wertenbroek@gmail.com>,
	"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Manivannan Sadhasivam" <mani@kernel.org>,
	"Kishon Vijay Abraham I" <kishon@kernel.org>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>
Subject: [PATCH v4 00/17] PCI endpoint fixes and improvements
Date: Thu, 30 Mar 2023 17:53:40 +0900	[thread overview]
Message-ID: <20230330085357.2653599-1-damien.lemoal@opensource.wdc.com> (raw)

This series fixes several issues with the PCI endpoint code and endpoint
test drivers (RC side and EP side).

The first 2 patches address an issue with the use of configfs to create
an endpoint driver type attributes group, preventing a potential crash
if the user creates a directory multiple times for the driver type
attributes.

The following patches are fixes and improvements for the endpoint test
drivers, EP side and RC side.

This is all tested using a Pine Rockpro64 board, with the rockchip ep
driver fixed using Rick Wertenbroek <rick.wertenbroek@gmail.com>
patches [1], plus some additional fixes from me.

[1] https://lore.kernel.org/linux-pci/20230214140858.1133292-1-rick.wertenbroek@gmail.com/

Changes from v3:
 - Corrected patch 7 and 12 title
 - Added patch 11

Changes from v2:
 - Add updates of the ntb and vntb function driver documentation in
   patch 1 to reflect the patch changes.
 - Removed unnecessary WARN_ON() call in patch 4
 - Added missing cc: stable tags
 - Added review tags

Changes from v1:
 - Improved patch 1 commit message
 - Modified patch 2 to not have to add an internal header file
 - Split former patch 3 into patch 3, 4 and 5
 - Removed former patch 4 introducing volatile casts and replaced it
   with patch 9
 - Added patch 6, 7, 8 and 10
 - Added Reviewed-by tags in patches not modified

Damien Le Moal (17):
  PCI: endpoint: Automatically create a function specific attributes
    group
  PCI: endpoint: Move pci_epf_type_add_cfs() code
  PCI: epf-test: Fix DMA transfer completion initialization
  PCI: epf-test: Fix DMA transfer completion detection
  PCI: epf-test: Use dmaengine_submit() to initiate DMA transfer
  PCI: epf-test: Simplify read/write/copy test functions
  PCI: epf-test: Simplify pci_epf_test_raise_irq()
  PCI: epf-test: Simplify IRQ test commands execution
  PCI: epf-test: Improve handling of command and status registers
  PCI: epf-test: Cleanup pci_epf_test_cmd_handler()
  PCI: epf-test: Cleanup request result handling
  PCI: epf-test: Simplify DMA support checks
  PCI: epf-test: Simplify transfers result print
  misc: pci_endpoint_test: Free IRQs before removing the device
  misc: pci_endpoint_test: Re-init completion for every test
  misc: pci_endpoint_test: Do not write status in IRQ handler
  misc: pci_endpoint_test: Simplify pci_endpoint_test_msi_irq()

 Documentation/PCI/endpoint/pci-ntb-howto.rst  |  11 +-
 Documentation/PCI/endpoint/pci-vntb-howto.rst |  13 +-
 drivers/misc/pci_endpoint_test.c              |  25 +-
 drivers/pci/endpoint/functions/pci-epf-test.c | 266 ++++++++----------
 drivers/pci/endpoint/pci-ep-cfs.c             |  53 ++--
 drivers/pci/endpoint/pci-epf-core.c           |  32 ---
 include/linux/pci-epf.h                       |   2 -
 7 files changed, 174 insertions(+), 228 deletions(-)

-- 
2.39.2