kernel/linux.git/drivers/fpga, branch v5.9.12

Merge 5.8-rc7 into char-misc-next

2020-07-27T09:49:37+00:00

This should resolve the merge/build issues reported when trying to create linux-next. Reported-by: Stephen Rothwell Signed-off-by: Greg Kroah-Hartman

Merge tag 'fpga-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga into char-misc-next

2020-07-23T07:24:26+00:00

Moritz writes: FPGA Manager changes for 5.9-rc1 Here is the (slightly larger than usual) patch set for the 5.9-rc1 merge window. DFL: - Xu's changes add support for AFU interrupt handling and puts them to use for error handling. - Xu's other change also adds another device-id for the Intel FPGA PAC N3000. - John's change converts from using get_user_pages() to pin_user_pages(). - Gustavo's patch cleans up some of the allocation by using struct_size(). Xilinx: - Luca's changes clean up the xilinx-spi and xilinx-slave-serial drivers and updates the comments and dt-bindings to reflect the fact it also supports 7 series devices. Core: - Tom cleaned up the fpga-bridge / fpga-mgr core by removing some dead-stores. All patches have been reviewed on the mailing list, and have been in the last few linux-next releases (as part of my for-next branch) without issues. Signed-off-by: Moritz Fischer * tag 'fpga-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga: fpga: dfl: pci: add device id for Intel FPGA PAC N3000 Documentation: fpga: dfl: add descriptions for interrupt related interfaces. fpga: dfl: afu: add AFU interrupt support fpga: dfl: fme: add interrupt support for global error reporting fpga: dfl: afu: add interrupt support for port error reporting fpga: dfl: introduce interrupt trigger setting API fpga: dfl: pci: add irq info for feature devices enumeration fpga: dfl: parse interrupt info for feature devices on enumeration fpga manager: xilinx-spi: check INIT_B pin during write_init dt-bindings: fpga: xilinx-slave-serial: add optional INIT_B GPIO fpga: Fix dead store in fpga-bridge.c fpga: Fix dead store fpga-mgr.c fpga: dfl: Use struct_size() in kzalloc() fpga manager: xilinx-spi: remove unneeded, mistyped variables fpga manager: xilinx-spi: valid for the 7 Series too dt-bindings: fpga: xilinx-slave-serial: valid for the 7 Series too fpga: dfl: afu: convert get_user_pages() --> pin_user_pages()

fpga: dfl: fix bug in port reset handshake

2020-07-14T05:11:17+00:00

When putting the port in reset, driver must wait for the soft reset acknowledgment bit instead of the soft reset bit. Fixes: 47c1b19c160f (fpga: dfl: afu: add port ops support) Signed-off-by: Matthew Gerlach Signed-off-by: Xu Yilun Acked-by: Wu Hao Reviewed-by: Tom Rix Signed-off-by: Moritz Fischer

fpga: dfl: pci: reduce the scope of variable 'ret'

2020-07-14T05:11:17+00:00

This is to fix lkp cppcheck warnings: drivers/fpga/dfl-pci.c:230:6: warning: The scope of the variable 'ret' can be reduced. [variableScope] int ret = 0; ^ drivers/fpga/dfl-pci.c:230:10: warning: Variable 'ret' is assigned a value that is never used. [unreadVariable] int ret = 0; ^ Fixes: 3c2760b78f90 ("fpga: dfl: pci: fix return value of cci_pci_sriov_configure") Reported-by: kbuild test robot Signed-off-by: Xu Yilun Acked-by: Wu Hao Reviewed-by: Tom Rix Signed-off-by: Moritz Fischer

fpga: dfl: pci: add device id for Intel FPGA PAC N3000

2020-07-13T02:00:37+00:00

Add PCIe Device ID for Intel FPGA PAC N3000. Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Signed-off-by: Matthew Gerlach Signed-off-by: Russ Weight Reviewed-by: Wu Hao Reviewed-by: Tom Rix Signed-off-by: Moritz Fischer

fpga: dfl: afu: add AFU interrupt support

2020-07-07T04:37:08+00:00

AFU (Accelerated Function Unit) is dynamic region of the DFL based FPGA, and always defined by users. Some DFL based FPGA cards allow users to implement their own interrupts in AFU. In order to support this, hardware implements a new UINT (AFU Interrupt) private feature with related capability register which describes the number of supported AFU interrupts as well as the local index of the interrupts for software enumeration, and from software side, driver follows the common DFL interrupt notification and handling mechanism, and it implements two ioctls below for user to query number of irqs supported and set/unset interrupt triggers. Ioctls: * DFL_FPGA_PORT_UINT_GET_IRQ_NUM get the number of irqs, which is used to determine how many interrupts UINT feature supports. * DFL_FPGA_PORT_UINT_SET_IRQ set/unset eventfds as AFU interrupt triggers. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Reviewed-by: Marcelo Tosatti Acked-by: Wu Hao Signed-off-by: Moritz Fischer

fpga: dfl: fme: add interrupt support for global error reporting

2020-07-07T04:35:42+00:00

Error reporting interrupt is very useful to notify users that some errors are detected by the hardware. Once users are notified, they could query hardware logged error states, no need to continuously poll on these states. This patch adds interrupt support for fme global error reporting sub feature. It follows the common DFL interrupt notification and handling mechanism. And it implements two ioctls below for user to query number of irqs supported, and set/unset interrupt triggers. Ioctls: * DFL_FPGA_FME_ERR_GET_IRQ_NUM get the number of irqs, which is used to determine whether/how many interrupts fme error reporting feature supports. * DFL_FPGA_FME_ERR_SET_IRQ set/unset given eventfds as fme error reporting interrupt triggers. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Reviewed-by: Marcelo Tosatti Acked-by: Wu Hao Signed-off-by: Moritz Fischer

fpga: dfl: afu: add interrupt support for port error reporting

2020-07-07T04:34:46+00:00

Error reporting interrupt is very useful to notify users that some errors are detected by the hardware. Once users are notified, they could query hardware logged error states, no need to continuously poll on these states. This patch adds interrupt support for port error reporting sub feature. It follows the common DFL interrupt notification and handling mechanism, implements two ioctl commands below for user to query number of irqs supported, and set/unset interrupt triggers. Ioctls: * DFL_FPGA_PORT_ERR_GET_IRQ_NUM get the number of irqs, which is used to determine whether/how many interrupts error reporting feature supports. * DFL_FPGA_PORT_ERR_SET_IRQ set/unset given eventfds as error interrupt triggers. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Reviewed-by: Marcelo Tosatti Acked-by: Wu Hao Signed-off-by: Moritz Fischer

fpga: dfl: introduce interrupt trigger setting API

2020-06-28T19:43:16+00:00

FPGA user applications may be interested in interrupts generated by DFL features. For example, users can implement their own FPGA logics with interrupts enabled in AFU (Accelerated Function Unit, dynamic region of DFL based FPGA). So user applications need to be notified to handle these interrupts. In order to allow userspace applications to monitor interrupts, driver requires userspace to provide eventfds as interrupt notification channels. Applications then poll/select on the eventfds to get notified. This patch introduces a generic helper functions to do eventfds binding with given interrupts. Sub feature drivers are expected to use XXX_GET_IRQ_NUM to query irq info, and XXX_SET_IRQ to set eventfds for interrupts. This patch also introduces helper functions for these 2 ioctls. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Signed-off-by: Tom Rix Reviewed-by: Marcelo Tosatti Acked-by: Wu Hao Signed-off-by: Moritz Fischer

fpga: dfl: pci: add irq info for feature devices enumeration

2020-06-28T19:42:58+00:00

Some DFL FPGA PCIe cards (e.g. Intel FPGA Programmable Acceleration Card) support MSI-X based interrupts. This patch allows PCIe driver to prepare and pass interrupt resources to DFL via enumeration API. These interrupt resources could then be assigned to actual features which use them. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Signed-off-by: Tom Rix Reviewed-by: Marcelo Tosatti Acked-by: Wu Hao Signed-off-by: Moritz Fischer