kernel/linux.git/drivers/misc/ocxl, branch v5.2.1

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

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 Signed-off-by: Greg Kroah-Hartman

ocxl: Fix return value check in afu_ioctl()

2019-05-06T10:21:56+00:00

In case of error, the function eventfd_ctx_fdget() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). This issue was detected by using the Coccinelle software. Fixes: 060146614643 ("ocxl: move event_fd handling to frontend") Signed-off-by: Wei Yongjun Acked-by: Alastair D'Silva Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman

ocxl: Provide global MMIO accessors for external drivers

2019-05-02T16:55:02+00:00

External drivers that communicate via OpenCAPI will need to make MMIO calls to interact with the devices. Signed-off-by: Alastair D'Silva Reviewed-by: Greg Kurz Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman

ocxl: move event_fd handling to frontend

2019-05-02T16:55:02+00:00

Event_fd is only used in the driver frontend, so it does not need to exist in the backend code. Relocate it to the frontend and provide an opaque mechanism for consumers instead. Signed-off-by: Alastair D'Silva Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman

ocxl: afu_irq only deals with IRQ IDs, not offsets

2019-05-02T16:55:02+00:00

The use of offsets is required only in the frontend, so alter the IRQ API to only work with IRQ IDs in the backend. Signed-off-by: Alastair D'Silva Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman

ocxl: Allow external drivers to use OpenCAPI contexts

2019-05-02T16:55:02+00:00

Most OpenCAPI operations require a valid context, so exposing these functions to external drivers is necessary. Signed-off-by: Alastair D'Silva Reviewed-by: Greg Kurz Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman

ocxl: Create a clear delineation between ocxl backend & frontend

2019-05-02T16:55:01+00:00

The OCXL driver contains both frontend code for interacting with userspace, as well as backend code for interacting with the hardware. This patch separates the backend code from the frontend so that it can be used by other device drivers that communicate via OpenCAPI. Relocate dev, cdev & sysfs files to the frontend code to allow external drivers to maintain their own devices. Reference counting on the device in the backend is replaced with kref counting. Move file & sysfs layer initialisation from core.c (backend) to pci.c (frontend). Create an ocxl_function oriented interface for initing devices & enumerating AFUs. Signed-off-by: Alastair D'Silva Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman

ocxl: Don't pass pci_dev around

2019-05-02T16:55:01+00:00

This data is already available in a struct Signed-off-by: Alastair D'Silva Acked-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman

ocxl: Split pci.c

2019-05-02T16:55:01+00:00

In preparation for making core code available for external drivers, move the core code out of pci.c and into core.c Signed-off-by: Alastair D'Silva Acked-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman

ocxl: Remove some unused exported symbols

2019-05-02T16:55:01+00:00

Remove some unused exported symbols. Signed-off-by: Alastair D'Silva Reviewed-by: Greg Kurz Acked-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman