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2015-01-22rtc: Remove the not used prototypeNeelesh Gupta1-2/+0
This seem to be left behind during the previous commit for creating a generic interface of reading the cached tod on non-fsp systems. So, remove the old prototype fsp_rtc_get_cached_tod(). Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-10Enable warn_unused_result for fsp_fetch_data_queue()Vasant Hegde1-1/+1
fsp_fetch_data_queue() internally calls fsp_queue_msg(). So ideally we should consume the result of this function. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-05occ: Fix clearing of OCC interrupt on remote fixBenjamin Herrenschmidt1-1/+1
If the OCC interrupt comes from another chip, we incorrectly try to clear it on the local one. This causes hangs at boot on some machines. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-02elog: Clean up error logging headersAlistair Popple2-189/+174
Commit cf6f4e8912d29fb89ce85c84834607065ad595a5 introduced a platform independent frontend for error logging. However it failed to move the generic parts of the fsp-elog.h header into the platform independent one, instead relying on the fact that up until now fsp-elog.h was included whenever a function needed to log errors. This patch moves the platform independent defines into the frontend header file (errorlog.h) and removes the include of the platform specific header in generic code paths. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-02esel: Add a logging backend for bmc based machinesAlistair Popple1-0/+8
This patch adds a backend for bmc based machines running AMI firmware supporting the OEM extended sel commands. Errors are logged in pel format to the bmc. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-02ipmi/bt: Enable adding messages to the start of the queueAlistair Popple1-0/+4
By default new ipmi messages are added to the end of the transmission queue. However sometimes it is necessary to add messages to the start of the queue. This patch adds a new ipmi function that adds messages to the start of the transmission queue. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-02rtc: Add a generic rtc cacheAlistair Popple1-0/+40
Some of the generic skiboot code needs access to the rtc (for example the pel logging code). Currently this is accessed via a call to fsp specific code which implements an rtc cache. Obviously this wont work on systems without a fsp. This patch makes the rtc cache generic so that we can get the time on other platforms (assuming they have some kind of rtc). Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-02tce: Use TCE macrosNeelesh Gupta1-2/+3
Use available TCE mask and size macros to make the code readable and easy to maintain. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-02ipmi/fru: Add support for populating fru dataAlistair Popple1-2/+6
This patch adds basic support for populating some fru data. Currently we only support adding the skiboot version number to the product information area. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-01Add tweaks to work in Mambo simulatorBenjamin Herrenschmidt3-2/+12
Mambo doesn't implement various things such as PBA SCOMs, LPC, ChipTOD, etc... It also provides a special console hook. This adds detection of Mambo via the /mambo node, and enables us to boot all the way to Linux. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-28Enable warn_unused_result for fsp_queue_msg()Stewart Smith1-1/+1
We now get a bunch of warnings of places where we should go and fix the code, yay! (acked in discussing thread on list) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Acked-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
2014-11-28Merge remote-tracking branch 'ltcgit/master'Benjamin Herrenschmidt9-19/+25
2014-11-28More trace endian fixes so make check works againBenjamin Herrenschmidt1-22/+24
We need the core to do proper endian among others since that code is compiled in run-trace Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-27Liberally sprinkle attribute((warn_unused_result)) around the placeStewart Smith7-18/+22
None of these actually produce any warnings. My next patch will. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-26Add attribute warn_unused_result to compiler.h and dt_expand_nodeStewart Smith2-1/+3
This would have thrown a compiler warning for cf8def9 rather than failing at runtime. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-26Merge branch 'update-2.1.1.1'Stewart Smith1-0/+1
2014-11-25occ/hbrt: Call stopOCC() for implementing reset OCC command from FSPShilpasri G Bhat1-0/+1
OPAL is expected to leave OCC stopped after receiving reset OCC message from FSP. FSP will send this either at boot before a load/start, or during runtime before load/start. If there is no subsequent load/start command, the OCC can be left stopped. After few attempts (runtime reset), FSP can just send reset and expect OPAL to leave OCC in stopped state. Call HBRT to stop OCC on FSP reset OCC command and acknowledge. Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-22Merge remote-tracking branch 'ltcgit/master'Benjamin Herrenschmidt2-5/+5
2014-11-22opal: Remove MCE handling code.Mahesh Salgaonkar3-106/+0
Removed following: - Machine check handle and other related routines. - per-cpu MCE event used to record machine check data cpu_thread->mc_event; - Machine check related definition including mce event structure from include/opal.h - A comment above GET_STACK() #define that warns about runtime modification made to GET_STACK macro by MC patching code. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-22opal: Remove machine check interrupt patching in OPAL.Mahesh Salgaonkar1-7/+1
Now that we catch/handle machine check interrupt directly in Linux host PowerNV kernel, we are not anymore dependent on OPAL firmware to do MCE handling job for us. The MCE handling code in OPAL has exclusive stack space (4k size) reserved and remains unused with Linux host not being dependent on it anymore. Hence, this patch removes the code that allows machine check interrupt patching in OPAL and reclaims back 4k of stack space for use of normal stack. For older kernel the patching request will result into an error. The subsequent patch will remove the rest of MCE handling code from OPAL. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-19Implement skiboot versioningStewart Smith2-5/+5
We grab a version from git tags (or SKIBOOT_VERSION environment variable), optionally tack on EXTRA_VERSION (if from git) as well as add things to the git version number if we're ahead of the most recent tag or the tree is dirty. Also fix-up makefiles so that we don't have to rebuild version.c every time you run make. fsp attn area needed updating as we can have >40 character version strings. We also export the version string via device tree rather than just the gitid. For buildroot builds, setting SKIBOOT_VERSION environment variable to the tag you grab will do the correct thing. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-18Add symbolic backtraces and expose skiboot map to LinuxBenjamin Herrenschmidt3-2/+8
We use a double link technique, doing a first pass with a .o containing a dummy symbol map, then re-linking with a new .o Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-18Remove useless global include memory.hBenjamin Herrenschmidt1-23/+0
It only exposed one function that is local to the hdat stuff Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-18Fix backtracesBenjamin Herrenschmidt1-0/+2
__builtin_frame_address really wants constants Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-18Capture backtraces when measuring stack depthBenjamin Herrenschmidt2-2/+8
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-18Add functions to backtrace into a non-text bufferBenjamin Herrenschmidt3-14/+28
Separate text translation from capture of the backtrace Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-17Stack checking extensionsBenjamin Herrenschmidt4-2/+24
This patch adds: - Normal builds are done with -fstack-protector (we want to investigate using -fstack-protector-strong on gcc4.9 but for now we just use that - Build with STACK_CHECK=1 will use -fstack-protector-all and -pg and will check the stack in mcount Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-14i2c: Provide FFDC data in the driverNeelesh Gupta3-1/+31
Define SRCs of I2C component and interface with the existing skiboot 'errorlog' infrasturcute for commiting the logs. Add the i2c specific OPAL error codes to differentiate various types of errors during i2c operations. To ease debugging, dump the i2c register contents, 'master' and 'request' structure bits in case any error occured during transfer on the bus. Minor clean-ups as well. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-12timer: Only check "poll" timers on actual poll, not any interruptBenjamin Herrenschmidt1-1/+1
Due to the lack of SLW timed interrupt support, we take the opportunity to check out timers on any incoming interrupt. However we really don't want to do that for the background pollers. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-12i2c: Use new timer facility and improve interrupts handlingBenjamin Herrenschmidt3-4/+7
We only poll the masters for the chip that got the interrupt and we improve the running of the timers as well. We user the new TIMER_POLL facility to replace the use of the OPAL poller, which simplifies the code further. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-12timer: Add "polling" timersBenjamin Herrenschmidt1-1/+17
These have no expiry and get called whenever the opal pollers run, they are intended to replace most opal pollers and allow the same code in drivers to chose between a poller or a timer based on things like interrupt availability for example. The other advantage over existing pollers (which I hope to deprecate) is that they are protected against re-entrancy (while still running without locks held). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-11i2c: Move bus management and OPAL API to core i2c codeBenjamin Herrenschmidt1-3/+25
And start adding interfaces to lookup i2c busses. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-07i2c: Rework P8 i2c driverBenjamin Herrenschmidt2-3/+23
This updates the i2c driver significantly, using a simpler state machine, using the new timer for timeouts, and fixing a number of issues. I also changed the Linux interface so I've changed the token number since some builds have been done with the old code already. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-07timer: Add scheduled timer facilityBenjamin Herrenschmidt2-0/+72
For now running off the event pollers, that will improve once we get delayed interrupts from the SLW Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-05i2c: Bug fixes, clean up of the codeNeelesh Gupta1-1/+0
Fixed few bugs and clean up a lot. Renamed the state machine variables to make more sense. A new helper 'p8_i2c_check_work' to avoid hitting deep call stack after request complete. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-30core: Add support for loading an external initramfsJeremy Kerr2-1/+5
Using the platform.load_resource interface, allow an external initramfs image to be passed to the kernel. We split the KERNEL_LOAD_BASE/KERNEL_LOAD_SIZE region in half, to allow space for the initramfs. Signed-off-by: Jeremy Kerr <jeremy.kerr@au.ibm.com> Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-30platform: add a platform hook for loading external resourcesJeremy Kerr2-0/+12
Currently, in core/init.c we do a fsp-specific load procedure to grab the kernel image. We'd like to do two things: allow other types of resources, and have paths for non-FSP platforms to perform loads. This change adds a platform-specific load_resource hook, and moves the currently loading code to fsp_load_resource. To allow other resource types, we add an identifier to indicate the type of resouce to load. Signed-off-by: Jeremy Kerr <jeremy.kerr@au.ibm.com> Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com> Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-30ipmi: Add an opal interface to the ipmi stackAlistair Popple2-1/+17
This patch adds two opal calls (opal_ipmi_send and opal_ipmi_recv) to allow an operating system to send and receive arbitrary ipmi messages to the BMC. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-30opal: Add facility for dynamic event bitsJeremy Kerr1-0/+2
We steal opal_update_pending_evt's lock for protecting the allocated dynamic event mask. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-27hw/i2c: i2c driver infrastructure providing device I/ONeelesh Gupta3-1/+58
This patch adds the generic i2c driver infrastructure to handle multiple i2c master cores present in the system and exposes structures and interfaces for the client to perform I/O on the i2c slave devices. The driver adds the capability to queue multiple requests from client and let clients notified asynchronously after completion. It does that by handling the i2c interrupt or through OPAL poller in the absence of interrupt. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-24irq/occ/opal: Add self-sent dummy interruptBenjamin Herrenschmidt2-1/+5
This makes OPAL use the OCC interrupt facility to send itself an interrupt whenever the OPAL event bit is set as a result of an OPAL call that wasn't itself opal_handle_interrupt() or opal_handle_hmi() (both of which we know the OS will already deal with appropriately). This ensures that OPAL event changes are notified to Linux via its interrupt path which is necessary for it to properly broadcast the state change to its various clients. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-22fsp/elog: Make the logging backend platform specificAlistair Popple1-0/+3
OpenPOWER boxes don't have an FSP and therefore implement their own method for passing log messages to a support processor. This patch makes the logging method platform specific. Signed-off-by: Alistair Popple <alistair@popple.id.au> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-22fsp/elog: Create a logging frontendAlistair Popple4-10/+64
In order to support fsp-less machines we need to be able to log errors using a BMC or some other mechanism. Currently the error logging code is tightly coupled to the platform making it difficult to add different platforms. This patch factors out the generic parts of the error logging code in preparation for adding different logging backends. It also adds a generic mechanism for pre-allocating a specific number of objects. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-22fsp/elog: Separate the PEL log formatting functionsAlistair Popple2-148/+178
The PEL log format is not specific to the FSP. We plan to use the same format for OpenPOWER systems. This patch refactors the code into a platform agnostic file. Signed-off-by: Alistair Popple <alistair@popple.id.au> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-17Rename mem_size() to mem_allocated_size()Stewart Smith1-1/+1
This better states the intention of what it should return. I was bit unsure when fixing mem_size(), so hopefully this makes future me (or other people) less unsure as to the intended return value of this function. No functional changes, just rename. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Acked-by: Rusty Russell <rusty@au1.ibm.com>
2014-10-15opal-msg: Bump up the maximum asynchronous completion countNeelesh Gupta1-1/+6
There are more components using asynchronous infrastructure for messaging between OPAL and kernel, therefore the patch bumps up the count and documents the usage. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-15sysparam: Add the new system parameter boot device pathNeelesh Gupta1-0/+1
The patch adds the support for reading and updating the system parameter boot device path. Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-10-15uart: Give UART it's own OPAL console callbacks instead of dummy consoleBenjamin Herrenschmidt2-3/+3
This means the Linux output no longer gets into our internal log, which makes dumping of it from Linux a lot nicer. It will also allow us to improve the way we do the bufferring for Linux and to exploit eventually the TX interrupts. It will also allow us to implement some form of timeouts for the OPAL console variant of it so we don't get stuck of the BMC doesn't consume from the virtual UART. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-15libflash: Sync with pflash 0.8.3Benjamin Herrenschmidt1-0/+6
Fixes 64MB chip support, improve Macronix settings, add Micron chip support, etc... Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-15led: Handle all the FSP_MCLASS_INDICATOR class sub commandsAnshuman Khandual1-0/+21
Right now if any non-LED FSP_MCLASS_INDICATOR class sub command is received, we print it as an invalid sub command like the following which then eventually gets reported as an unhandled FSP message. [163022636453,5] FSPLED: Invalid FSP async sub command da1105 [163022638116,3] FSP: Unhandled message da1105 This patch defines the complete list of FSP_MCLASS_INDICATOR sub commands and handle them in the registered FSP async command client by sending a generic error acknowledgement to the FSP. Reported-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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