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* powerpc/512x: dts: add MPC5125 clock specsGerhard Sittig2014-01-12
| | | | | | | | | add clock related specs to the MPC5125 "tower" board DTS - add clock providers (crystal/oscillator, clock control module) - add consumers (the CAN, SDHC, I2C, DIU, FEC, USB, PSC peripherals) Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* powerpc/512x: clk: support MPC5121/5123/5125 SoC variantsGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | improve the common clock support code for MPC512x - expand the CCM register set declaration with MPC5125 related registers (which reside in the previously "reserved" area) - tell the MPC5121, MPC5123, and MPC5125 SoC variants apart, and derive the availability of components and their clocks from the detected SoC (MBX, AXE, VIU, SPDIF, PATA, SATA, PCI, second FEC, second SDHC, number of PSC components, type of NAND flash controller, interpretation of the CPMF bitfield, PSC/CAN mux0 stage input clocks, output clocks on SoC pins) - add backwards compatibility (allow operation against a device tree which lacks clock related specs) for MPC5125 FECs, too telling SoC variants apart and adjusting the clock tree's generation occurs at runtime, a common generic binary supports all of the chips the MPC5125 approach to the NFC clock (one register with two counters for the high and low periods of the clock) is not implemented, as there are no users and there is no common implementation which supports this kind of clock -- the new implementation would be unused and could not get verified, so it shall wait until there is demand Signed-off-by: Gerhard Sittig <gsi@denx.de> Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* powerpc/512x: clk: enforce even SDHC divider valuesGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | | the SDHC clock is derived from CSB with a fractional divider which can address "quarters"; the implementation multiplies CSB by 4 and divides it by the (integer) divider value a bug in the clock domain synchronisation requires that only even divider values get setup; we achieve this by - multiplying CSB by 2 only instead of 4 - registering with CCF the divider's bit field without bit0 - the divider's lowest bit remains clear as this is the reset value and later operations won't touch it this change keeps fully utilizing common clock primitives (needs no additional support logic, and avoids an excessive divider table) and satisfies the hardware's constraint of only supporting even divider values Signed-off-by: Gerhard Sittig <gsi@denx.de> Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* powerpc/512x: clk: minor comment updatesGerhard Sittig2014-01-12
| | | | | | | | | adjust (expand on or move) a few comments, add markers for easier navigation around helpers Signed-off-by: Gerhard Sittig <gsi@denx.de> Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* clk: mpc512x: remove migration support workaroundsGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | this change removes workarounds which have become obsolete after migration to common clock support has completed - remove clkdev registration calls (compatibility clock item aliases) after all peripheral drivers were adjusted for device tree based clock lookup - remove pre-enable workarounds after all peripheral drivers were adjusted to acquire their respective clock items workarounds for these clock items get removed: FEC (ethernet), I2C, PSC (UART, SPI), PSC FIFO, USB, NFC (NAND flash), VIU (video capture), BDLC (CAN), CAN MCLK, DIU (video output) these clkdev registered names won't be provided any longer by the MPC512x platform's clock driver: "psc%d_mclk", "mscan%d_mclk", "usb%d_clk", "nfc_clk", "viu_clk", "sys_clk", "ref_clk" the pre-enable workaround for PCI remains, but depends on the presence of PCI related device tree nodes (disables the PCI clock in the absence of PCI nodes, keeps the PCI clock enabled in the presence of nodes) -- moving clock acquisition into the peripheral driver isn't possible for PCI because its initialization takes place before the platform clock driver gets initialized, thus the clock provider isn't available then Cc: Mike Turquette <mturquette@linaro.org> Cc: Anatolij Gustschin <agust@denx.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* powerpc/mpc512x: improve DIU related clock setupGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | adapt the DIU clock initialization to the COMMON_CLK approach: device tree based clock lookup, prepare and unprepare for clocks, work with frequencies not dividers, call the appropriate clk_*() routines and don't access CCM registers the "best clock" determination now completely relies on the platform's clock driver to pick a frequency close to what the caller requests, and merely checks whether the desired frequency was met (fits the tolerance of the monitor) this approach shall succeed upon first try in the usual case, will test a few less desirable yet acceptable frequencies in edge cases, and will fallback to "best effort" if none of the previously tried frequencies pass the test provide a fallback clock lookup approach in case the OF based clock lookup for the DIU fails, this allows for successful operation in the presence of an outdated device tree which lacks clock specs Cc: Anatolij Gustschin <agust@denx.de> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* net: can: mscan: remove non-CCF code for MPC512xGerhard Sittig2014-01-12
| | | | | | | | | | | | | transition to the common clock framework has completed and the PPC_CLOCK is no longer available for the MPC512x platform, remove the now obsolete code path of the mpc5xxx mscan driver which accessed clock control module registers directly Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: linux-can@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* net: can: mscan: adjust to common clock support for mpc512xGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | implement a .get_clock() callback for the MPC512x platform which uses the common clock infrastructure (eliminating direct access to the clock control registers from within the CAN network driver), and provide the corresponding .put_clock() callback to release resources after use acquire both the clock items for register access ("ipg") as well as for wire communication ("can") keep the previous implementation of MPC512x support in place during migration, this results in a readable diff of the change this change is neutral to the MPC5200 platform Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: linux-can@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* fsl-viu: adjust for OF based clock lookupGerhard Sittig2014-01-12
| | | | | | | | | | | after device tree based clock lookup became available, the VIU driver need no longer use the previous global "viu_clk" name, but should use the "ipg" clock name specific to the OF node Cc: Mauro Carvalho Chehab <m.chehab@samsung.com> Cc: linux-media@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* mtd: mpc5121_nfc: adjust for OF based clock lookupGerhard Sittig2014-01-12
| | | | | | | | | | | | after device tree based clock lookup became available, the NAND flash driver need no longer use the previous global "nfc_clk" name, but should use the "ipg" clock name specific to the OF node Cc: David Woodhouse <dwmw2@infradead.org> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: linux-mtd@lists.infradead.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* USB: fsl-mph-dr-of: adjust for OF based clock lookupGerhard Sittig2014-01-12
| | | | | | | | | | | | after device tree based clock lookup became available, the peripheral driver need no longer construct clock names which include the component index -- remove the "usb%d_clk" template, always use "ipg" instead Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-usb@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* serial: mpc512x: setup the PSC FIFO clock as wellGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | prepare and enable the FIFO clock upon PSC FIFO initialization, check for and propagage errors when enabling the PSC FIFO clock, disable and unprepare the FIFO clock upon PSC FIFO uninitialization devm_{get,put}_clk() doesn't apply here, as the SoC provides a single FIFO component which is shared among several PSC components, thus the FIFO isn't associated with a device (while the PSCs are) provide a fallback clock lookup approach in case the OF based clock lookup for the PSC FIFO fails, this allows for successful operation in the presence of an outdated device tree which lacks clock specs Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-serial@vger.kernel.org Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* serial: mpc512x: adjust for OF based clock lookupGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | after device tree based clock lookup became available, the peripheral driver need no longer construct clock names which include the PSC index, remove the "psc%d_mclk" template and unconditionally use 'mclk' acquire and release the "ipg" clock item for register access as well Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-serial@vger.kernel.org Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* spi: mpc512x: adjust to OF based clock lookupGerhard Sittig2014-01-12
| | | | | | | | | | | | | | after device tree based clock lookup became available, the peripheral driver need no longer construct clock names which include the PSC index, remove the "psc%d_mclk" template and unconditionally use 'mclk' acquire and release the 'ipg' clock item for register access as well Cc: Mark Brown <broonie@kernel.org> Cc: linux-spi@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Acked-by: Mark Brown <broonie@linaro.org> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* clk: mpc5xxx: switch to COMMON_CLK, retire PPC_CLOCKGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the setup before the change was - arch/powerpc/Kconfig had the PPC_CLOCK option, off by default - depending on the PPC_CLOCK option the arch/powerpc/kernel/clock.c file was built, which implements the clk.h API but always returns -ENOSYS unless a platform registers specific callbacks - the MPC52xx platform selected PPC_CLOCK but did not register any callbacks, thus all clk.h API calls keep resulting in -ENOSYS errors (which is OK, all peripheral drivers deal with the situation) - the MPC512x platform selected PPC_CLOCK and registered specific callbacks implemented in arch/powerpc/platforms/512x/clock.c, thus provided real support for the clock API - no other powerpc platform did select PPC_CLOCK the situation after the change is - the MPC512x platform implements the COMMON_CLK interface, and thus the PPC_CLOCK approach in arch/powerpc/platforms/512x/clock.c has become obsolete - the MPC52xx platform still lacks genuine support for the clk.h API while this is not a change against the previous situation (the error code returned from COMMON_CLK stubs differs but every call still results in an error) - with all references gone, the arch/powerpc/kernel/clock.c wrapper and the PPC_CLOCK option have become obsolete, as did the clk_interface.h header file the switch from PPC_CLOCK to COMMON_CLK is done for all platforms within the same commit such that multiplatform kernels (the combination of 512x and 52xx within one executable) keep working Cc: Mike Turquette <mturquette@linaro.org> Cc: Anatolij Gustschin <agust@denx.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* dts: mpc512x: add clock specs for client lookupsGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | this addresses the client side of device tree based clock lookups add clock specifiers to the mbx, nfc, mscan, sdhc, i2c, axe, diu, viu, mdio, fec, usb, pata, psc, psc fifo, and pci nodes in the shared mpc5121.dtsi include Cc: Rob Herring <rob.herring@calxeda.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: devicetree@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Reviewed-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* clk: mpc512x: add backwards compat to the CCF codeGerhard Sittig2014-01-12
| | | | | | | | | | | | | extend the recently added COMMON_CLK platform support for MPC512x such that it works with incomplete device tree data which lacks clock specs Cc: Mike Turquette <mturquette@linaro.org> Cc: Anatolij Gustschin <agust@denx.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Gerhard Sittig <gsi@denx.de> [agust@denx.de: moved node macro definitions out of the function body] Signed-off-by: Anatolij Gustschin <agust@denx.de>
* clk: mpc512x: introduce COMMON_CLK for MPC512x (disabled)Gerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | this change implements a clock driver for the MPC512x PowerPC platform which follows the COMMON_CLK approach and uses common clock drivers shared with other platforms this driver implements the publicly announced set of clocks (those listed in the dt-bindings header file), as well as generates additional 'struct clk' items where the SoC hardware cannot easily get mapped to the common primitives (shared code) of the clock API, or requires "intermediate clock nodes" to represent clocks that have both gates and dividers the previous PPC_CLOCK implementation is kept in place and remains active for the moment, the newly introduced CCF clock driver will receive additional support for backwards compatibility in a subsequent patch before it gets enabled and will replace the PPC_CLOCK approach some of the clock items get pre-enabled in the clock driver to not have them automatically disabled by the underlying clock subsystem because of their being unused -- this approach is desirable because - some of the clocks are useful to have for diagnostics and information despite their not getting claimed by any drivers (CPU, internal and external RAM, internal busses, boot media) - some of the clocks aren't claimed by their peripheral drivers yet, either because of missing driver support or because device tree specs aren't available yet (but the workarounds will get removed as the drivers get adjusted and the device tree provides the clock specs) clkdev registration provides "alias names" for few clock items - to not break those peripheral drivers which encode their component index into the name that is used for clock lookup (UART, SPI, USB) - to not break those drivers which use names for the clock lookup which were encoded in the previous PPC_CLOCK implementation (NFC, VIU, CAN) this workaround will get removed as these drivers get adjusted after device tree based clock lookup has become available the COMMON_CLK implementation copes with device trees which lack an oscillator node (backwards compat), the REF clock is then derived from the IPS bus frequency and multiplier values fetched from hardware Cc: Mike Turquette <mturquette@linaro.org> Cc: Anatolij Gustschin <agust@denx.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* dts: mpc512x: add clock related device tree specsGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | this addresses the clock driver aka provider's side of clocks - introduce a 'clocks' subtree with an 'osc' node for the crystal or oscillator SoC input (fixed frequency) - the 'clock@f00' clock-control-module node references the 'osc' for its input, and is another provider for all the clocks which the CCM component manages - prepare for future references to clocks from peripheral nodes by means of the <&clks ID> syntax and symbolic ID names which a header file provides - provide default values with 33MHz oscillator frequency in the common include (the 66MHz IPS bus already was there), and add override values for the ifm AC14xx board which deviates from the reference design (25MHz xtal, 80MHz IPS bus) Cc: Rob Herring <rob.herring@calxeda.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: linux-arm-kernel@lists.infradead.org Cc: devicetree@vger.kernel.org Reviewed-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* dts: mpc512x: introduce dt-bindings/clock/ headerGerhard Sittig2014-01-12
| | | | | | | | | | | | | | | | introduce a dt-bindings/ header file for MPC512x clocks, providing symbolic identifiers for those SoC clocks which clients will reference from their device tree nodes Cc: Rob Herring <rob.herring@calxeda.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: devicetree@vger.kernel.org Reviewed-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* Merge branch 'merge' into nextBenjamin Herrenschmidt2013-12-29
|\ | | | | | | | | | | | | Merge a pile of fixes that went into the "merge" branch (3.13-rc's) such as Anton Little Endian fixes. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * Merge remote-tracking branch 'agust/merge' into mergeBenjamin Herrenschmidt2013-12-29
| |\ | | | | | | | | | | | | | | | | | | Anatolij writes: Please pull two DTS fixes for MPC5125 tower board. Without them the v3.13-rcX kernels do not boot.
| | * powerpc/512x: dts: disable MPC5125 usb moduleMatteo Facchinetti2013-12-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At the moment the USB controller's pin muxing is not setup correctly and causes a kernel panic upon system startup, so disable the USB1 device tree node in the MPC5125 tower board dts file. The USB controller is connected to an USB3320 ULPI transceiver and the device tree should receive an update to reflect correct dependencies and required initialization data before the USB1 node can get re-enabled. Signed-off-by: Matteo Facchinetti <matteo.facchinetti@sirius-es.it> Signed-off-by: Anatolij Gustschin <agust@denx.de>
| | * powerpc/512x: dts: remove misplaced IRQ spec from 'soc' node (5125)Gerhard Sittig2013-12-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the 'soc' node in the MPC5125 "tower" board .dts has an '#interrupt-cells' property although this node is not an interrupt controller remove this erroneously placed property because starting with v3.13-rc1 lookup and resolution of 'interrupts' specs for peripherals gets misled (tries to use the 'soc' as the interrupt parent which fails), emits 'no irq domain found' WARN() messages and breaks the boot process [ best viewed with 'git diff -U5' to have DT node names in the context ] Cc: Anatolij Gustschin <agust@denx.de> Cc: linuxppc-dev@lists.ozlabs.org Cc: devicetree@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
| * | powerpc: Fix alignment of secondary cpu spin varsOlof Johansson2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 5c0484e25ec0 ('powerpc: Endian safe trampoline') resulted in losing proper alignment of the spinlock variables used when booting secondary CPUs, causing some quite odd issues with failing to boot on PA Semi-based systems. This showed itself on ppc64_defconfig, but not on pasemi_defconfig, so it had gone unnoticed when I initially tested the LE patch set. Fix is to add explicit alignment instead of relying on good luck. :) [ It appears that there is a different issue with PA Semi systems however this fix is definitely correct so applying anyway -- BenH ] Fixes: 5c0484e25ec0 ('powerpc: Endian safe trampoline') Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=67811 Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Align p_endAnton Blanchard2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | p_end is an 8 byte value embedded in the text section. This means it is only 4 byte aligned when it should be 8 byte aligned. Fix this by adding an explicit alignment. This fixes an issue where POWER7 little endian builds with CONFIG_RELOCATABLE=y fail to boot. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powernv/eeh: Add buffer for P7IOC hub error dataBrian W Hart2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prevent ioda_eeh_hub_diag() from clobbering itself when called by supplying a per-PHB buffer for P7IOC hub diagnostic data. Take care to inform OPAL of the correct size for the buffer. [Small style change to the use of sizeof -- BenH] Signed-off-by: Brian W Hart <hartb@linux.vnet.ibm.com> Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powernv/eeh: Fix possible buffer overrun in ioda_eeh_phb_diag()Brian W Hart2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | PHB diagnostic buffer may be smaller than PAGE_SIZE, especially when PAGE_SIZE > 4KB. Signed-off-by: Brian W Hart <hartb@linux.vnet.ibm.com> Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Make 64-bit non-VMX __copy_tofrom_user bi-endianPaul E. McKenney2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The powerpc 64-bit __copy_tofrom_user() function uses shifts to handle unaligned invocations. However, these shifts were designed for big-endian systems: On little-endian systems, they must shift in the opposite direction. This commit relies on the C preprocessor to insert the correct shifts into the assembly code. [ This is a rare but nasty LE issue. Most of the time we use the POWER7 optimised __copy_tofrom_user_power7 loop, but when it hits an exception we fall back to the base __copy_tofrom_user loop. - Anton ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Make unaligned accesses endian-safe for powerpcRajesh B Prathipati2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The generic put_unaligned/get_unaligned macros were made endian-safe by calling the appropriate endian dependent macros based on the endian type of the powerpc processor. Signed-off-by: Rajesh B Prathipati <rprathip@linux.vnet.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Fix bad stack check in exception entryMichael Neuling2013-12-29
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In EXCEPTION_PROLOG_COMMON() we check to see if the stack pointer (r1) is valid when coming from the kernel. If it's not valid, we die but with a nice oops message. Currently we allocate a stack frame (subtract INT_FRAME_SIZE) before we check to see if the stack pointer is negative. Unfortunately, this won't detect a bad stack where r1 is less than INT_FRAME_SIZE. This patch fixes the check to compare the modified r1 with -INT_FRAME_SIZE. With this, bad kernel stack pointers (including NULL pointers) are correctly detected again. Kudos to Paulus for finding this. Signed-off-by: Michael Neuling <mikey@neuling.org> cc: stable@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Fix OPAL LPC access in Little EndianBenjamin Herrenschmidt2013-12-12
| | | | | | | | | | | | | | We are passing pointers to the firmware for reads, we need to properly convert the result as OPAL is always BE. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Fix endian issue in opal_xscom_readAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | opal_xscom_read uses a pointer to return the data so we need to byteswap it on LE builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix endian issues in crash dump codeAnton Blanchard2013-12-12
| | | | | | | | | | | | | | A couple more device tree properties that need byte swapping. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix endian issues in MSI codeAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | The MSI code is miscalculating quotas in little endian mode. Add required byteswaps to fix this. Before we claimed a quota of 65536, after the patch we see the correct value of 256. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix PCIE link speed endian issueAnton Blanchard2013-12-12
| | | | | | | | | | | | | | We need to byteswap ibm,pcie-link-speed-stats. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix endian issues in nvram codeAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The NVRAM code has a number of endian issues. I noticed a very confused error log count: RTAS: 100663330 -------- RTAS event begin -------- 100663330 == 0x06000022. 0x6 LE error logs and 0x22 BE error logs. The pstore code has similar issues - if we write an oops in one endian and attempt to read it in another we get junk. Make both of these formats big endian, and byteswap as required. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix endian issues in /proc/ppc64/lparcfgAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | Some obvious issues: cat /proc/ppc64/lparcfg ... partition_id=16777216 ... partition_potential_processors=268435456 Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix topology core_id endian issue on LE buildsAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | cpu_to_core_id() is missing a byteswap: cat /sys/devices/system/cpu/cpu63/topology/core_id 201326592 Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix endian issue in setup-common.cAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | During on LE boot we see: Partition configured for 1073741824 cpus, operating system maximum is 2048. Clearly missing a byteswap here. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: PTRACE_PEEKUSR always returns FPR0Ulrich Weigand2013-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a bug in using ptrace to access FPRs via PTRACE_PEEKUSR / PTRACE_POKEUSR. In effect, trying to access any of the FPRs always really accesses FPR0, which does seriously break debugging :-) The problem seems to have been introduced by commit 3ad26e5c4459d (Merge branch 'for-kvm' into next). [ It is indeed a merge conflict between Paul's FPU/VSX state rework and my LE patches - Anton ] Signed-off-by: Ulrich Weigand <Ulrich.Weigand@de.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix up the kdump base cap to 128MMahesh Salgaonkar2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current logic sets the kdump base to min of 2G or ppc64_rma_size/2. On PowerNV kernel the first memory block 'memory@0' can be very large, equal to the DIMM size with ppc64_rma_size value capped to 1G. Hence on PowerNV, kdump base is set to 512M resulting kdump to fail while allocating paca array. This is because, paca need its memory from RMA region capped at 256M (see allocate_pacas()). This patch lowers the kdump base cap to 128M so that kdump kernel can successfully get memory below 256M for paca allocation. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powernv: Fix VFIO support with PHB3Thadeu Lima de Souza Cascardo2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | I have recently found out that no iommu_groups could be found under /sys/ on a P8. That prevents PCI passthrough from working. During my investigation, I found out there seems to be a missing iommu_register_group for PHB3. The following patch seems to fix the problem. After applying it, I see iommu_groups under /sys/kernel/iommu_groups/, and can also bind vfio-pci to an adapter, which gives me a device at /dev/vfio/. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/52xx: Re-enable bestcomm driver in defconfigsAnatolij Gustschin2013-12-09
| | | | | | | | | | | | | | | | | | | | The bestcomm driver has been moved to drivers/dma, so to select this driver by default additionally CONFIG_DMADEVICES has to be enabled. Currently it is not enabled in the config despite existing CONFIG_PPC_BESTCOMM=y in the config files. Fix it. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pasemi: Turn on devtmpfs in defconfigOlof Johansson2013-12-09
| | | | | | | | | | | | | | | | At least some distros expect it these days; turn it on. Also, random churn from doing a savedefconfig for the first time in a year or so. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * offb: Add palette hack for little endianCedric Le Goater2013-12-09
| | | | | | | | | | | | | | | | | | | | | | The pseudo palette color entries need to be ajusted for little endian. This patch byteswaps the values in the pseudo palette depending on the host endian order and the screen depth. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * offb: Little endian fixesCedric Le Goater2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | The "screen" properties : depth, width, height, linebytes need to be converted to the host endian order when read from the device tree. The offb_init_palette_hacks() routine also made assumption on the host endian order. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix PTE page address mismatch in pgtable ctor/dtorHong H. Pham2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In pte_alloc_one(), pgtable_page_ctor() is passed an address that has not been converted by page_address() to the newly allocated PTE page. When the PTE is freed, __pte_free_tlb() calls pgtable_page_dtor() with an address to the PTE page that has been converted by page_address(). The mismatch in the PTE's page address causes pgtable_page_dtor() to access invalid memory, so resources for that PTE (such as the page lock) is not properly cleaned up. On PPC32, only SMP kernels are affected. On PPC64, only SMP kernels with 4K page size are affected. This bug was introduced by commit d614bb041209fd7cb5e4b35e11a7b2f6ee8f62b8 "powerpc: Move the pte free routines from common header". On a preempt-rt kernel, a spinlock is dynamically allocated for each PTE in pgtable_page_ctor(). When the PTE is freed, calling pgtable_page_dtor() with a mismatched page address causes a memory leak, as the pointer to the PTE's spinlock is bogus. On mainline, there isn't any immediately obvious symptoms, but the problem still exists here. Fixes: d614bb041209fd7c "powerpc: Move the pte free routes from common header" Cc: Paul Mackerras <paulus@samba.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linux-stable <stable@vger.kernel.org> # v3.10+ Signed-off-by: Hong H. Pham <hong.pham@windriver.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/44x: Fix ocm_block allocationIlia Mirkin2013-12-09
| | | | | | | | | | | | | | | | Allocate enough memory for the ocm_block structure, not just a pointer to it. Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix build break with PPC_EARLY_DEBUG_BOOTX=yMichael Ellerman2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | A kernel configured with PPC_EARLY_DEBUG_BOOTX=y but PPC_PMAC=n and PPC_MAPLE=n will fail to link: btext.c:(.text+0x2d0fc): undefined reference to `.rmci_off' btext.c:(.text+0x2d214): undefined reference to `.rmci_on' Fix it by making the build of rmci_on/off() depend on PPC_EARLY_DEBUG_BOOTX, which also enable the only code that uses them. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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