linux/arch/powerpc/include/asm/opal.h, branch v4.8

powerpc: Put exception configuration in a common place

2016-07-21T08:56:31Z

The various calls to establish exception endianness and AIL are now done from a single point using already established CPU and FW feature bits to decide what to do. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman

powerpc/opal: Add real mode call wrappers

2016-07-17T06:42:46Z

Replace the old generic opal_call_realmode() with proper per-call wrappers similar to the normal ones and convert callers. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman

powerpc/powernv: Add XICS emulation APIs

2016-07-15T10:18:43Z

OPAL provides an emulated XICS interrupt controller to use as a fallback on newer processors that don't have a XICS. It's meant as a way to provide backward compatibility with future processors. Add the corresponding interfaces. Signed-off-by: Benjamin Herrenschmidt Acked-by: Stewart Smith Signed-off-by: Michael Ellerman

powerpc/opal: Wake up kopald polling thread before waiting for events

2016-07-08T09:53:26Z

On some environments (prototype machines, some simulators, etc...) there is no functional interrupt source to signal completion, so we rely on the fairly slow OPAL heartbeat. In a number of cases, the calls complete very quickly or even immediately. We've observed that it helps a lot to wakeup the OPAL heartbeat thread before waiting for event in those cases, it will call OPAL immediately to collect completions for anything that finished fast enough. Signed-off-by: Benjamin Herrenschmidt Acked-By: Michael Neuling Signed-off-by: Michael Ellerman

powerpc/powernv: Add driver for operator panel on FSP machines

2016-06-29T07:33:46Z

Implement new character device driver to allow access from user space to the operator panel display present on IBM Power Systems machines with FSPs. This will allow status information to be presented on the display which is visible to a user. The driver implements a character buffer which a user can read/write by accessing the device (/dev/op_panel). This buffer is then displayed on the operator panel display. Any attempt to write past the last character position will have no effect and attempts to write more characters than the size of the display will be truncated. The device may only be accessed by a single process at a time. Signed-off-by: Suraj Jitindar Singh Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman

powerpc/opal: Add inline function to get rc from an ASYNC_COMP opal_msg

2016-06-29T07:33:18Z

An opal_msg of type OPAL_MSG_ASYNC_COMP contains the return code in the params[1] struct member. However this isn't intuitive or obvious when reading the code and requires that a user look at the skiboot documentation or opal-api.h to verify this. Add an inline function to get the return code from an opal_msg and update call sites accordingly. Signed-off-by: Suraj Jitindar Singh Signed-off-by: Michael Ellerman

powerpc/powernv: Functions to get/set PCI slot state

2016-06-21T05:30:58Z

This exports 4 functions, which base on the corresponding OPAL APIs to get/set PCI slot status. Those functions are going to be used by PowerNV PCI hotplug driver: pnv_pci_get_device_tree() opal_get_device_tree() pnv_pci_get_presence_state() opal_pci_get_presence_state() pnv_pci_get_power_state() opal_pci_get_power_state() pnv_pci_set_power_state() opal_pci_set_power_state() Signed-off-by: Gavin Shan Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman

powerpc/powernv: Support PCI slot ID

2016-06-21T05:30:57Z

The reset and poll functionality from (OPAL) firmware supports PHB and PCI slot at same time. They are identified by ID. This supports PCI slot ID by: * Rename the argument name for opal_pci_reset() and opal_pci_poll() accordingly * Rename pnv_eeh_phb_poll() to pnv_eeh_poll() and adjust its argument name. * One macro is added to produce PCI slot ID. Signed-off-by: Gavin Shan Signed-off-by: Michael Ellerman

powerpc/powernv: new function to access OPAL msglog

2016-02-09T09:27:04Z

Currently, the OPAL msglog/console buffer is exposed as a sysfs file, with the sysfs read handler responsible for retrieving the log from the OPAL buffer. We'd like to be able to use it in xmon as well. Refactor the OPAL msglog code to create a new function, opal_msglog_copy(), that copies to an arbitrary buffer. Separate the initialisation code into generic memcons init and sysfs file creation. Signed-off-by: Andrew Donnellan Signed-off-by: Michael Ellerman

powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages

2016-01-13T01:35:17Z

The recently added OPAL API call, OPAL_CONSOLE_FLUSH, originally took no parameters and returned nothing. The call was updated to accept the terminal number to flush, and returned various values depending on the state of the output buffer. The prototype has been updated and its usage in the OPAL kmsg dumper has been modified to support its new behaviour as an incremental flush. Signed-off-by: Russell Currey Signed-off-by: Michael Ellerman