linux-toradex.git - Linux kernel for Apalis and Colibri modules

Age	Commit message (Collapse)	Author
2015-08-12	cxl: sparse: Silence iomem warning in debugfs file creation	Daniel Axtens
	An IO address, tagged with __iomem, is passed to debugfs_create_file as private data. This requires that it be cast to void *. The cast drops the __iomem annotation and so creates a sparse warning: drivers/misc/cxl/debugfs.c:51:57: warning: cast removes address space of expression The address space marker is added back in the file operations (fops_io_u64). Silence the warning with __force. Signed-off-by: Daniel Axtens <dja@axtens.net> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-10-08	cxl: Driver code for powernv PCIe based cards for userspace access	Ian Munsie
	This is the core of the cxl driver. It adds support for using cxl cards in the powernv environment only (ie POWER8 bare metal). It allows access to cxl accelerators by userspace using the /dev/cxl/afuM.N char devices. The kernel driver has no knowledge of the function implemented by the accelerator. It provides services to userspace via the /dev/cxl/afuM.N devices. When a program opens this device and runs the start work IOCTL, the accelerator will have coherent access to that processes memory using the same virtual addresses. That process may mmap the device to access any MMIO space the accelerator provides. Also, reads on the device will allow interrupts to be received. These services are further documented in a later patch in Documentation/powerpc/cxl.txt. Documentation of the cxl hardware architecture and userspace API is provided in subsequent patches. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>