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2016-11-24Limit number of "Poller recursion detected" errors to displayStewart Smith1-1/+5
In some error conditions, we could spiral out of control on this and spend all of our time printing the exact same backtrace. Limit it to 16 times, because 16 is a nice number. Cc: stable Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit b6a729e118f42dae88ebf70a09a7e2aa4f788fdc) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-10-24pci: Check power state before powering off slotGavin Shan1-1/+17
I made the inappropriate assumption: PCI slot's power state is always on from the beginning. We don't check the slot's power state before turning it off in PCI enumeration path when there are no PCI adapters behind the slot. The PCI slot's power might have been turned off and we needn't power it off again. Otherwise, the below (not harmful) message is raised: [ 47.243635711,5] SkiBoot skiboot-5.4.0-rc1 starting... : [ 13.239871630,5] PHB#0001:02:01.0 Error -1 powering off slot This checks power state and avoid turning it off again if it's already in off state. Flag PCI_SLOT_FLAG_BOOTUP is also removed after the requested operation is completed as the flag should be used at skiboot booting stage. Cc: stable # 5.3.0+ Reported-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Tested-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit 1408f6f9baa684f280dfb2c4a66daa4d5db996b2) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-10-17core/pci: Reserve PCI buses for RC's slotGavin Shan1-2/+21
When RC's downstream link is down, we need reserve spare PCI buses if it has an associated PCI hotplug slot. Otherwise, the adapter behind it can't be probed successfully in PCI hot add scenario. This reserves all available buses (to 255) for RC's hotplug slot when its downstream is down so that PCI adapter can be hot added to the slot afterwards. Cc: stable # 5.3.0+ Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit 481ad7330e332770b1dcd2c9f56d0a2caac67755) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-10-17core/pci: Get PCI slot before applying quirkGavin Shan1-12/+10
We might need know the associated PCI slot before applying the chip level quirk (phb->ops->device_init()) so that special configuration on the specific PCI slot can be applied. This moves the logic of creating PCI slot, applying the quirk and linking the newly probed device to parent's child list to function pci_scan_one(). Also, the PCI slot is created prior to applying the quirk. Cc: stable # 5.3.0+ Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit 39aad95618fea977464bfc38ec0c190075a26304) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-09-22core/pci: Fix the power-off timeout in pci_slot_power_off()Gavin Shan1-1/+1
The timeout should be 1000ms instead of 1000 ticks while powering off PCI slot in pci_slot_power_off(). Otherwise, it's likely to hit timeout powering off the PCI slot as below skiboot logs reveal: [47912590456,5] SkiBoot skiboot-5.3.6 starting... : [5399532365,7] PHB#0005:02:11.0 Bus 0f..ff scanning... [5399540804,7] PHB#0005:02:11.0 No card in slot [5399576870,5] PHB#0005:02:11.0 Timeout powering off slot [5401431782,3] FIRENZE-PCI: Wrong state 00000000 on slot 8000000002880005 This replaces time_wait() with time_wait_ms() to resolve the issue. Fixes: 358b4d654f100cfdfcba939cae012099a851b3bc Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit 171726631d014cd5e61170f06028474d900a827e) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-08-25lpc: Log LPC SYNC errors as unrecoverable ones for manufacturingVipin K Parashar1-1/+7
High volume of SYNC errors onto LPC bus cause degraded system performance and are likely due to bad hardware present onto system. Thus once LPC SYNC errors cross a certain threshold, OPAL should log them onto BMC as unrecoverable errors in manufacturing mode. This will help manufacturing screen bad parts, causing such errors. Cc: stable Signed-off-by: Vipin K Parashar <vipin@linux.vnet.ibm.com> [stewart@linux.vnet.ibm.com: s/mfg/manufacturing/] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit 51b9eeb66ebbd1706248d8f2277afa9b7dcdbc3b) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-08-10hmi: Clean up NPU FIR debug messagesRussell Currey1-3/+4
With the skiboot log set to debug, the FIR (and related registers) were logged all in the same message. It was too much for one line, didn't clarify if the numbers were in hex, and didn't show leading zeroes. So, split it into two lines, with leading zeroes and a "0x" prefix. Signed-off-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit 4eabfa056562e144c1a011bf4159387337023659) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-08-02log_level: Reduce the in memory console log_level to lower priorityPridhiviraj Paidipeddi3-3/+3
Below are the in-memory console log messages observed with error level(PR_ERROR) [54460318,3] HBRT: Mem region 'ibm,homer-image' not found ! [54465404,3] HBRT: Mem region 'ibm,homer-image' not found ! [54470372,3] HBRT: Mem region 'ibm,homer-image' not found ! [54475369,3] HBRT: Mem region 'ibm,homer-image' not found ! [11540917382,3] NVRAM: Layout appears sane [11694529822,3] OPAL: Trying a CPU re-init with flags: 0x2 [61291003267,3] OPAL: Trying a CPU re-init with flags: 0x1 [61394005956,3] OPAL: Trying a CPU re-init with flags: 0x2 Lowering the log level of mem region not found messages to PR_WARNING and remaining messages to PR_INFO level [54811683,4] HBRT: Mem region 'ibm,homer-image' not found ! [10923382751,6] NVRAM: Layout appears sane [55533988976,6] OPAL: Trying a CPU re-init with flags: 0x1 Signed-off-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> (cherry picked from commit 341daa8104af3231b908e6fcffeedb5e47b33990) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-28core/flash: Fix passing pointer instead of valueCyril Bur1-1/+1
flash_find_subpartition() accepts a pointer to a boolean variable indicating ecc for a region of flash and passes the pointer directly to flash_read_corrected() which actually only wants the value. This has always worked probably because there has always been ECC on sub partitions. How there aren't any warnings triggered by this condition escapes me. Fixes: 6c26bc7 ("libflash: move ffs_flash_read into libflash") Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-27nvram: Add extra debug printing when NVRAM needs formattingCyril Bur2-4/+11
Be more verbose (at debug level) when formatting the NVRAM, this can help catch errors at other levels of the stack. Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-25core/console: use char literals instead of numericOliver O'Halloran1-2/+2
Save everyone a trip to asciitable.com. I realise everyone has probably memorised \n and friends, but THAT'S NOT THE POINT. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-22core/timer: Add support for platform specific heartbeatChris Smart1-6/+10
The timer code currently has a default and a special check for FSP machines or those with SLW timer facility. This patch adds support for platform quirk to set the timer. Signed-off-by: Chris Smart <chris@distroguy.com> Acked-by: Michael Neuling <mikey@neuling.org> [stewart@linux.vnet.ibm.com: fix whitespace issue] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-22core/timer: Actually use default heartbeat valueChris Smart1-3/+3
HEARTBEAT_DEFAULT_MS sets the default heartbeat timeout, however this was not actually used as the default. The default was ten times quicker than this (HEARTBEAT_DEFAULT_MS / 10) while HEARTBEAT_DEFAULT_MS was actually used as a special case for FSP machines or those with SLW timer facility. This patch makes the default use HEARTBEAT_DEFAULT_MS and changes FSP or machines with SLW timer facility run 10 times slower (HEARTBEAT_DEFAULT_MS * 10). This will also now match the existing in-line comment. Signed-off-by: Chris Smart <chris@distroguy.com> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-20device-tree: Only advertise ibm, opal-v3 (not v2) on POWER9 and aboveStewart Smith1-2/+7
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-20Stop adding legacy linux, phandle to device tree, just add phandleStewart Smith1-5/+0
Since the very first commit of a skeleton powernv platform in Linux, the kernel has been able to deal with phandle rather than linux,phandle. Thus, every kernel in the real world that has a hope of even getting to a twinkle in the eye of booting knows about phandle. So, we don't need to add linux,phandle along with phandle as it's just redundantly redundant. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-20flash: Allocate flashes dynamicallyMichael Neuling1-34/+35
Convert flashes from a static array which wastes memory and limits us. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-14OPAL_REINIT_CPUS: clarify that for P9 and above, we can have other flagsStewart Smith1-1/+3
On P8 we got it a bit wrong and would fall into a workaround for P8 DD1 HILE setting if other bits were set in the flags to OPAL_REINIT_CPUS, limiting our opportunity to extend it in the future. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-13cpu: Don't call time_wait with lock heldBenjamin Herrenschmidt1-7/+17
Also make the locking around re-init safer, properly block the OS from restarting a thread that was caught for re-init. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-13interrupts: Expose irq_source and change prototypes of all opsBenjamin Herrenschmidt1-41/+64
This makes irq_source public, and change all irq_source_ops to take the source pointer as a first argument (they can still dig the void * data out of that). This will allow us to embed/wrap it for XIVE later on. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-12interrupts: Use a #interrupt-cells of 2 for XICS interruptsBenjamin Herrenschmidt2-7/+11
This is more compliant with PAPR, it will also allow us to use the second cell for other attributes on P9. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-12make check: make test runs less noisyStewart Smith1-4/+4
Run a small wrapper around some unit tests with the QTEST makefile macro (QTEST=Quiet TEST). Also, wrap boot tests in mambo and qemu to be quiet by default. Both ./test/run.sh and the modified mambo/qemu test runner scripts output full stdout and stderr in the event of error. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-11nvram-format: fix inconsistent indentingStewart Smith1-3/+3
Found by smatch static analysis (http://smatch.sourceforge.net/): core/nvram-format.c:146 nvram_check() warn: inconsistent indenting core/nvram-format.c:151 nvram_check() warn: inconsistent indenting Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-11mem_region: fix inconsistent indentingStewart Smith1-3/+3
Found by smatch static analysis (http://smatch.sourceforge.net/): core/mem_region.c:561 mem_check() warn: inconsistent indenting core/mem_region.c:569 mem_check() warn: inconsistent indenting Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-08hw/phb4: Add initial supportBenjamin Herrenschmidt2-0/+24
This adds the base support for the PHB4. It currently only support the M32 window, EEH or in general error recovery aren't supported yet. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [stewart@linux.vnet.ibm.com: update (C) year, fix indenting] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-08pci: When restoring bus numbers after a reset, also restore device cacheBenjamin Herrenschmidt1-1/+7
PCIe devices cache the bus number on the first config write, make sure we restore them when at the same time Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-08pci: get_reserved_pe_number() needs to take the PHB as argumentBenjamin Herrenschmidt1-1/+1
The value might be different for different PHB instances Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-08XIVE: Base XIVE support for OPAL XICS emulation callsBenjamin Herrenschmidt1-1/+8
This provides basic initialization of the XIVE along with some OPAL calls to emulate an old-style XICS which will initially be used by Linux for backward compatibility. The current implementation is limited to one priority and doesn't expose much to Linux for future exploitation mode yet. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [stewart@linux.vnet.ibm.com: add (C) header, fix whitespace, missing breaks] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-08interrupts: Add eoi() callback in preparation for XIVE supportBenjamin Herrenschmidt1-4/+19
This will be used by the XICS emulation in order to EOI the sources themselves. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-06Timebase quirk for slow simulators like AWAN and SIMICSBenjamin Herrenschmidt4-2/+23
This will internally pretend the timebase is running 1000 times slower, which reduces some otherwise really terrible delays in some simulators. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> [stewart@linux.vnet.ibm.com: move cfam_chipid cleanup into own patch] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-06devicetree: Add dt_node_is_enabled()Benjamin Herrenschmidt1-0/+10
This accessor tests the "status" property allowing us to represent disabled devices in the device-tree. It will be used by PHB4 initially but its usage could be made more widespread. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-06uart: Cleanup initialization and remove simulator hackBenjamin Herrenschmidt2-3/+12
Add more generic support for MMIO based UARTs, simplify code, use common initialization, and clean up the device-tree representation as well. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-06Revert "flash: Use blocklevel to do ECC reads"Stewart Smith1-2/+2
Was causing boot failures on Garrison and Firestone (likely other OpenPower platforms) This reverts commit 74ba83462c64d6a987ed4785aee55309daf9ffb6. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-05chip: Add simics specific quirksMichael Neuling1-1/+2
Use that instead of mambo. Simics supports the F000F, so remove that quirk. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-05flash: Use blocklevel to do ECC readsAlistair Popple1-2/+2
flash_read_corrected() assumes the passed blocklevel device is an actual flash device. However the blocklevel flash abstraction supports automatically reading ECC protected data so use that instead. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Michael Neuling <mikey@neuling.org> Reviewed-by: Cyril Bur <cyrilbur@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-05flash: Increase the maximum number of flash devicesMichael Neuling1-1/+1
Increase the max number of flash devices from 1 to 8. With mambo bogusdisk, we can have many flash devices. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-01cpu: supply ibm,dec-bits via devicetreeOliver O'Halloran1-0/+48
ISAv3 adds a mode to increase the size of the decrementer from 32 bits. The enlarged decrementer can be between 32 and 64 bits wide with the exact value being implementation dependent. This patch adds support for detecting the size of the large decrementer and populating each CPU node with the "ibm,dec-bits" property. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> [stewart@linux.vnet.ibm.com: rename enable_ld() to enable_large_dec()] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-27core/opal.c: Add FWTS annotations for pollers and missing OPAL_CHECK_TOKENStewart Smith1-2/+30
For the missing OPAL_CHECK_TOKEN call, it means we catch kernel bugs in the firmware test suite, which I guess is a valid thing to do, if slightly odd. Unfortunately, kernels for POWER8 systems shipped with this (totally harmless) bug, so it's possible that if FWTS is run on older POWER8 PowerNV kernels, this warning will be hit. On POWER9 and above though, this warning should never be hit. The annotations for pollers should also never be hit, although I'm not convinced we don't have a spot or two in OPAL where this could still be the case (specifically, under certain error conditions). Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-24i2c: Add FWTS annotations for I2c ErrorsStewart Smith1-0/+13
Two possible error states: kernel asks us for something incorrect, OPAL runs out of memory... both of which require investigation. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-21nvlink: Print error message when NPU is fencedRussell Currey1-1/+1
NPU fences aren't recoverable, and as such, would require user intervention to have a working system again. The fence will be picked up by the kernel through EEH, but this doesn't happen until the NPU is used for something. So, let's print a message so it's obvious when this happens. A helper function was added to reduce duplication. This also enables code in skiboot to un-fence a NPU, which is useful to NPU developers but very stupid otherwise. Signed-off-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-20ccore/fflash.c: Ffix ttypo iin fflash eerror mmessageJeremy Kerr1-1/+1
wwhich -> which. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-20fwts: add annotations for core flash/nvram functionalityStewart Smith1-0/+12
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-20Add fwts annotations for critical errorsStewart Smith3-0/+20
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-20slw: Allow adding idle states to power-mgt node in mamboShreyas B. Prabhu1-2/+1
This patch removes the check which prevents adding any idle state to "power-mgt" node in mambo. Power8 exposes 3 idle states- nap, fast-sleep and deep-winkle. While fast-sleep depends on SCOMs and deep-winkle depends on SCOMs/SLW, nap has no such dependencies and it can be enabled in mambo. Current code checks for "fast-sleep" in hostboot provided "ibm,enabled-idle-states" dt node for adding fast-sleep and checks for presence of SLW for adding winkle to "power-mgt". Hence with this change only nap will be added to "power-mgt" node in mambo on Power8. On Power9, this patch enables all idle states which don't need SLW. Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-20ATTN: Set attn bit instead of hile bit in enable/disable attn functionVasant Hegde1-2/+2
Commit 3ff35034 (Abstract HILE and attn enable bit definitions for HID0) enabled HILE bit instead of ATTN bit in enable/disable_attn fuction. Hence OPAL assert is failing. Fixes: 3ff35034 (Abstract HILE and attn enable bit definitions for HID0) CC: Michael Neuling <mikey@neuling.org> Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-14core/opal: Support PCI slot and new APIsGavin Shan1-26/+209
The various reset requests are completed by PHB's callbacks. All of them (except reset on IODA table or error injection) are covered by PCI slot. opal_pci_poll() faces similar situation. This reimplements opal_pci_reset() and opal_pci_poll() based on the callbacks provided by PCI slot instead of PHB. Also, couple of new APIs are introduced based on the callbacks in PCI slot as below: * opal_pci_get_presence_state(): Check if there is adapter presented behind the specified PHB or PCI slot. * opal_pci_get_power_state(): Returns power supply state (on or off) on the specified PHB or PCI slot. * opal_pci_set_power_state(): Sets power supply state (on or off) on the specified PHB or PCI slot. Besides, the state can be (offline or online) without changing the PCI slot's power state. Eventually, the definition of unused PHB's callbacks are removed. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-14core/pci: Power off empty hotpluggable slotGavin Shan1-1/+55
This powers off the empty hotpluggable slot during PCI enumeration for two purpose: power saving and initialize the slot to starting (power-off) state. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-14core/pci: Use PCI slot in enumerationGavin Shan1-141/+38
During PCI enumeration, the root complex's link and fundamental reset are carried out by PHB's callbacks which are replaced by the corresponding PCI slot's callbacks. Also, the hotplug related device node properties are populated based on the PCI slot info that is included in PCI slot now. This uses PCI slot in enumeration: * Use PCI slot's callbacks for fundamental reset and link status retrieval in PCI enumeration. * Simplify the code by removing traditional PCI/PCI-x related logic as we don't have PCI/PCI-X root complex. * Replace pci_add_slot_properties() with pci_slot_add_properties() to populate PCI slot properties in device-tree. * PHB is always not hotpluggable. No hotpluggable properties in its device node are needed. * Remove "struct pci_slot_info" definition as its info is included in "struct pci_slot". Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-14core/pci: Support PCI slotGavin Shan4-25/+714
Every PCIE bridge port or PHB is expected to be bound with PCI slot , to which various PCI slot's functionalities are attached (e.g. power, link, reset). This supports PCI slot: * PCI slot is reprsented by "struct pci_slot". * "struct pci_slot_ops" represents the functions supported on the PCI slot. It's initialized by PCI slot core at the beginning and allowed to be overrided by platform partially or completely. * On PCI hot plugging event, the PCI devices behind the slot are enumarated. Device sub-tree is populated and sent to OS by OPAL message. * On PCI hot unplugging event, the PCI devices behind the slot are destroyed. Device sub-tree is removed and the slot is powered off. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-14core/pci: Return value for struct phb_ops::device_initGavin Shan1-1/+1
This adds @data argument and "int" return value for struct phb_ops:: device_init() so that it can be called in pci_walk_dev() directly to reinitialize the PCI devices behind the specified slot in subsequent patches. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-06-14core/pci: Extend pci_restore_bridge_buses() for PCI slotGavin Shan1-2/+2
Currently, pci_restore_bridge_buses() restores the assigned bus ranges for all PCI bridges behind the specified PHB. This extends the function and allows doing same thing for the PCI bridges behind the specified slot. The extended functionality is going to be used by PCI hotplug logic in the subsequent patches. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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