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2017-11-15Merge tag 'mailbox-v4.15' of git://git.linaro.org/landing-teams/working/fujitsu/integrationLinus Torvalds6-28/+66
Pull mailbox updates from Jassi Brar: "Change to POLL api and fixes for FlexRM and OMAP driver. Summary: - Core: Prefer ACK method over POLL, if both supported - Test: use flag instead of special character - FlexRM: Usual driver internal minor churn - Omap: fix error path" * tag 'mailbox-v4.15' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox/omap: unregister mbox class mailbox: mailbox-test: don't rely on rx_buffer content to signal data ready mailbox: reset txdone_method TXDONE_BY_POLL if client knows_txdone mailbox: Build Broadcom FlexRM driver as loadable module for iProc SOCs mailbox: bcm-flexrm-mailbox: Use common GPL comment header mailbox: bcm-flexrm-mailbox: add depends on ARCH_BCM_IPROC mailbox: bcm-flexrm-mailbox: Print ring number in errors and warnings mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush sequence
2017-11-14mailbox/omap: unregister mbox classArvind Yadav1-1/+5
platform_driver_register() can fail here and we must unregister mbox class. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Suman Anna <s-anna@ti.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-11-14mailbox: mailbox-test: don't rely on rx_buffer content to signal data readySudeep Holla1-5/+6
Currently we rely on the first byte of the Rx buffer to check if there's any data available to be read. If the first byte of the received buffer is zero (i.e. null character), then we fail to signal that data is available even when it's available. Instead introduce a boolean variable to track the data availability and update it in the channel receive callback as ready and clear it when the data is read. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-11-14mailbox: reset txdone_method TXDONE_BY_POLL if client knows_txdoneSudeep Holla2-4/+4
Currently the mailbox framework sets txdone_method to TXDONE_BY_POLL if the controller sets txdone_by_poll. However some clients can have a mechanism to do TXDONE_BY_ACK which they can specify by knows_txdone. However, we endup setting both TXDONE_BY_POLL and TXDONE_BY_ACK in that case. In such scenario, we may end up with below warnings as the tx ticker is run both by mailbox framework and the client. WARNING: CPU: 1 PID: 0 at kernel/time/hrtimer.c:805 hrtimer_forward+0x88/0xd8 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.12.0-rc5 #242 Hardware name: ARM LTD ARM Juno Development Platform task: ffff8009768ca700 task.stack: ffff8009768f8000 PC is at hrtimer_forward+0x88/0xd8 LR is at txdone_hrtimer+0xd4/0xf8 Call trace: hrtimer_forward+0x88/0xd8 __hrtimer_run_queues+0xe4/0x158 hrtimer_interrupt+0xa4/0x220 arch_timer_handler_phys+0x30/0x40 handle_percpu_devid_irq+0x78/0x130 generic_handle_irq+0x24/0x38 __handle_domain_irq+0x5c/0xb8 gic_handle_irq+0x54/0xa8 This patch fixes the issue by resetting TXDONE_BY_POLL if client has set knows_txdone. Cc: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-11-13Merge tag 'acpi-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds1-1/+0
Pull ACPI updates from Rafael Wysocki: "These update ACPICA to upstream revision 20170831, fix APEI to use the fixmap instead of ioremap_page_range(), add an operation region driver for TI PMIC TPS68470, add support for PCC subspace IDs to the ACPI CPPC driver, fix a few assorted issues and clean up some code. Specifics: - Update the ACPICA code to upstream revision 20170831 including * PDTT table header support (Bob Moore). * Cleanup and extension of internal string-to-integer conversion functions (Bob Moore). * Support for 64-bit hardware accesses (Lv Zheng). * ACPI PM Timer code adjustment to deal with 64-bit return values of acpi_hw_read() (Bob Moore). * Support for deferred table verification in acpiexec (Lv Zheng). - Fix APEI to use the fixmap instead of ioremap_page_range() which cannot work correctly the way the code in there attempted to use it and drop some code that's not necessary any more after that change (James Morse). - Clean up the APEI support code and make it use 64-bit timestamps (Arnd Bergmann, Dongjiu Geng, Jan Beulich). - Add operation region driver for TI PMIC TPS68470 (Rajmohan Mani). - Add support for PCC subspace IDs to the ACPI CPPC driver (George Cherian). - Fix an ACPI EC driver regression related to the handling of EC events during the "noirq" phases of system suspend/resume (Lv Zheng). - Delay the initialization of the lid state in the ACPI button driver to fix issues appearing on some systems (Hans de Goede). - Extend the KIOX000A "device always present" quirk to cover all affected BIOS versions (Hans de Goede). - Clean up some code in the ACPI core and drivers (Colin Ian King, Gustavo Silva)" * tag 'acpi-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (24 commits) ACPI: Mark expected switch fall-throughs ACPI / LPSS: Remove redundant initialization of clk ACPI / CPPC: Make CPPC ACPI driver aware of PCC subspace IDs mailbox: PCC: Move the MAX_PCC_SUBSPACES definition to header file ACPI / sysfs: Make function param_set_trace_method_name() static ACPI / button: Delay acpi_lid_initialize_state() until first user space open ACPI / EC: Fix regression related to triggering source of EC event handling APEI / ERST: use 64-bit timestamps ACPI / APEI: Remove arch_apei_flush_tlb_one() arm64: mm: Remove arch_apei_flush_tlb_one() ACPI / APEI: Remove ghes_ioremap_area ACPI / APEI: Replace ioremap_page_range() with fixmap ACPI / APEI: remove the unused dead-code for SEA/NMI notification type ACPI / x86: Extend KIOX000A quirk to cover all affected BIOS versions ACPI / APEI: adjust a local variable type in ghes_ioremap_pfn_irq() ACPICA: Update version to 20170831 ACPICA: Update acpi_get_timer for 64-bit interface to acpi_hw_read ACPICA: String conversions: Update to add new behaviors ACPICA: String conversions: Cleanup/format comments. No functional changes ACPICA: Restructure/cleanup all string-to-integer conversion functions ...
2017-11-13Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds1-6/+6
Pull timer updates from Thomas Gleixner: "Yet another big pile of changes: - More year 2038 work from Arnd slowly reaching the point where we need to think about the syscalls themself. - A new timer function which allows to conditionally (re)arm a timer only when it's either not running or the new expiry time is sooner than the armed expiry time. This allows to use a single timer for multiple timeout requirements w/o caring about the first expiry time at the call site. - A new NMI safe accessor to clock real time for the printk timestamp work. Can be used by tracing, perf as well if required. - A large number of timer setup conversions from Kees which got collected here because either maintainers requested so or they simply got ignored. As Kees pointed out already there are a few trivial merge conflicts and some redundant commits which was unavoidable due to the size of this conversion effort. - Avoid a redundant iteration in the timer wheel softirq processing. - Provide a mechanism to treat RTC implementations depending on their hardware properties, i.e. don't inflict the write at the 0.5 seconds boundary which originates from the PC CMOS RTC to all RTCs. No functional change as drivers need to be updated separately. - The usual small updates to core code clocksource drivers. Nothing really exciting" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (111 commits) timers: Add a function to start/reduce a timer pstore: Use ktime_get_real_fast_ns() instead of __getnstimeofday() timer: Prepare to change all DEFINE_TIMER() callbacks netfilter: ipvs: Convert timers to use timer_setup() scsi: qla2xxx: Convert timers to use timer_setup() block/aoe: discover_timer: Convert timers to use timer_setup() ide: Convert timers to use timer_setup() drbd: Convert timers to use timer_setup() mailbox: Convert timers to use timer_setup() crypto: Convert timers to use timer_setup() drivers/pcmcia: omap1: Fix error in automated timer conversion ARM: footbridge: Fix typo in timer conversion drivers/sgi-xp: Convert timers to use timer_setup() drivers/pcmcia: Convert timers to use timer_setup() drivers/memstick: Convert timers to use timer_setup() drivers/macintosh: Convert timers to use timer_setup() hwrng/xgene-rng: Convert timers to use timer_setup() auxdisplay: Convert timers to use timer_setup() sparc/led: Convert timers to use timer_setup() mips: ip22/32: Convert timers to use timer_setup() ...
2017-11-09mailbox: PCC: Move the MAX_PCC_SUBSPACES definition to header fileGeorge Cherian1-1/+0
Move the MAX_PCC_SUBSPACES definition to acpi/pcc.h file in preparation to add subspace ID support for cppc_acpi driver. Signed-off-by: George Cherian <george.cherian@cavium.com> Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-11-06mailbox: Convert timers to use timer_setup()Kees Cook1-6/+6
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Ley Foon Tan <lftan@altera.com> Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: nios2-dev@lists.rocketboards.org Signed-off-by: Kees Cook <keescook@chromium.org>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman1-0/+1
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-27mailbox: Build Broadcom FlexRM driver as loadable module for iProc SOCsAnup Patel1-1/+1
By default, we build Broadcom FlexRM driver as loadable module for iProc SOCs so that kernel image is little smaller and we load FlexRM driver only when required. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-10-27mailbox: bcm-flexrm-mailbox: Use common GPL comment headerAnup Patel1-5/+13
This patch makes the comment header of Broadcom FlexRM driver similar to the GPL comment header used across Broadcom driver sources. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-10-27mailbox: bcm-flexrm-mailbox: add depends on ARCH_BCM_IPROCScott Branden1-0/+1
The Broadcom FlexRM Mailbox is only present in the Broadcom IPROC SoCs. Add depends on ARCH_BCM_IPROC to BCM_FLEXRX_MBOX. Signed-off-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Ray Jui <ray.jui@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-10-27mailbox: bcm-flexrm-mailbox: Print ring number in errors and warningsAnup Patel1-9/+17
This patch updates all dev_err() and dev_warn() to print ring number so that we have more info for debugging. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-10-27mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush sequenceAnup Patel1-3/+19
As-per suggestion from FlexRM HW folks, we have to first set FlexRM ring flush state and then clear it for FlexRM ring flush to work properly. Currently, the FlexRM driver has incomplete FlexRM ring flush sequence which causes repeated insmod+rmmod of mailbox client drivers to fail. This patch fixes FlexRM ring flush sequence in flexrm_shutdown() as described above. Fixes: dbc049eee730 ("mailbox: Add driver for Broadcom FlexRM ring manager") Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Cc: stable@vger.kernel.org Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-09-07Merge tag 'mailbox-v4.14' of git://git.linaro.org/landing-teams/working/fujitsu/integrationLinus Torvalds1-77/+175
Pull mailbox updates from Jassi Brar: "Just behavorial changes to a controller driver: the Broadcom's Flexrm mailbox driver has been modifified to support debugfs and TX-Done mechanism by ACK. Nothing for the core mailbox stack" * tag 'mailbox-v4.14' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: bcm-flexrm-mailbox: Use txdone_ack instead of txdone_poll mailbox: bcm-flexrm-mailbox: Use bitmap instead of IDA mailbox: bcm-flexrm-mailbox: Fix mask used in CMPL_START_ADDR_VALUE() mailbox: bcm-flexrm-mailbox: Add debugfs support mailbox: bcm-flexrm-mailbox: Set IRQ affinity hint for FlexRM ring IRQs
2017-08-31mailbox: bcm-flexrm-mailbox: Use txdone_ack instead of txdone_pollAnup Patel1-57/+4
Currently, FlexRM driver uses txdone_poll method of Linux Mailbox to model the send_data() callback. To achieve this, we have introduced "last_pending_msg" pointer for each FlexRM ring which keeps track of the message that did not fit in the FlexRM ring. This patch updates FlexRM driver to use txdone_ack method instead of txdone_poll method because txdone_poll is not efficient for FlexRM and requires additional tracking in FlexRM driver. Also, moving to txdone_ack method helps us remove "last_pending_msg" pointer and last_tx_done() callback. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Ray Jui <ray.jui@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-08-31mailbox: bcm-flexrm-mailbox: Use bitmap instead of IDAAnup Patel1-17/+19
Currently, we are using IDA library for managing IDs on a FlexRM ring. The IDA library dynamically allocates memory for underlying data structures which can cause potential locking issue when allocating/free IDs from flexrm_new_request() and flexrm_process_completions(). To tackle this, we replace use of IDA with bitmap for each FlexRM ring and also protect the bitmap with FlexRM ring lock. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-08-31mailbox: bcm-flexrm-mailbox: Fix mask used in CMPL_START_ADDR_VALUE()Anup Patel1-1/+1
The mask used in CMPL_START_ADDR_VALUE() should be 27bits instead of 26bits. This incorrect mask was causing completion writes to 40bits physical address fail. This patch fixes mask used in CMPL_START_ADDR_VALUE() macro. Fixes: dbc049eee730 ("mailbox: Add driver for Broadcom FlexRM ring manager") Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Ray Jui <ray.jui@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Cc: stable@vger.kernel.org Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-08-31mailbox: bcm-flexrm-mailbox: Add debugfs supportAnup Patel1-2/+134
This patch adds debugfs support to Broadcom FlexRM driver so that we can see FlexRM ring state when any issue happens. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Vikram Prakash <vikram.prakash@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-08-31mailbox: bcm-flexrm-mailbox: Set IRQ affinity hint for FlexRM ring IRQsAnup Patel1-0/+17
This patch set IRQ affinity hint for FlexRM ring IRQ at time of enabling ring (i.e. flexrm_startup()). The IRQ affinity hint will allow FlexRM driver to distribute FlexRM ring IRQs across online CPUs so that all FlexRM ring IRQs don't land in CPU0 by default. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Ray Jui <ray.jui@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-08-10mailbox: pcc: Drop uninformative output during bootPunit Agrawal1-3/+1
When booting on an ACPI enabled system that does not provide the Platform Communications Channel Table (PCCT), the pcc mailbox driver prints - [ 0.484261] PCCT header not found. during probe before returning -ENODEV. This message clutters the bootlog and doesn't provide any useful information. Drop this message. Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Acked-by: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-26mailbox: pcc: Fix crash when request PCC channel 0Hoan Tran1-1/+1
When PCCT is not available, kernel crashes as below when requests PCC channel 0. This patch fixes this issue. [ 0.920454] PCCT header not found. ... [ 8.031309] Unable to handle kernel NULL pointer dereference at virtual address 00000010 [ 8.031310] [0000000000000010] user address but active_mm is swapper [ 8.031312] Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 8.031313] Modules linked in: [ 8.031316] CPU: 31 PID: 1 Comm: swapper/0 Tainted: G W 4.13.0-rc1 #18 [ 8.031317] Hardware name: AppliedMicro(R) 07/20/2017 [ 8.031318] task: ffff809ef3b08000 task.stack: ffff809ef3b10000 [ 8.031322] PC is at pcc_mbox_request_channel+0x8c/0x160 [ 8.031325] LR is at xgene_slimpro_i2c_probe+0x1c0/0x378 [ 8.031326] pc : [<ffff000008899450>] lr : [<ffff000008819dac>] pstate: 00000045 [ 8.031327] sp : ffff809ef3b13bd0 [ 8.031327] x29: ffff809ef3b13bd0 x28: ffff000008ed90a0 [ 8.031329] x27: ffff000009091000 x26: ffff000008e50470 [ 8.031330] x25: ffff000008ed9100 x24: ffff809eefd9ac30 [ 8.031332] x23: 0000000000000000 x22: ffff0000090e3e10 [ 8.031333] x21: ffff0000090e3000 x20: 0000000000000000 [ 8.031335] x19: 0000000000000000 x18: 0000000000087ffc [ 8.031336] x17: 2fe48d76a78303f0 x16: 0000000000087ffc [ 8.031337] x15: ffff000000000000 x14: 0000000000000000 [ 8.031339] x13: 0000000000000000 x12: 0000000000000018 [ 8.031340] x11: 0000000000000018 x10: 0101010101010101 [ 8.031342] x9 : 0000000000000000 x8 : 7f7f7f7f7f7f7f7f [ 8.031343] x7 : fefefefeff6b646d x6 : 0000008080808080 [ 8.031345] x5 : 0000000000000000 x4 : 0000000000000001 [ 8.031346] x3 : 0000000000000000 x2 : ffff000008819b64 [ 8.031348] x1 : 0000000000000000 x0 : 0000000000000000 ... [ 8.031393] Call trace: [ 8.031394] Exception stack(0xffff809ef3b13a00 to 0xffff809ef3b13b30) [ 8.031395] 3a00: 0000000000000000 0001000000000000 ffff809ef3b13bd0 ffff000008899450 [ 8.031397] 3a20: ffff809f7e1f9a10 ffff000008f60be0 0000000000000001 ffff809ef3b13b7c [ 8.031398] 3a40: ffff809f7e1f9a10 0000000000000000 ffff000009091000 0000000000000003 [ 8.031399] 3a60: ffff000009091000 0000000000000003 ffff809ef3b13a80 ffff0000084e0794 [ 8.031400] 3a80: ffff809ef3b13a90 ffff00000850bb64 ffff809ef3b13ad0 ffff00000850bf34 [ 8.031402] 3aa0: 0000000000000000 0000000000000000 ffff000008819b64 0000000000000000 [ 8.031403] 3ac0: 0000000000000001 0000000000000000 0000008080808080 fefefefeff6b646d [ 8.031404] 3ae0: 7f7f7f7f7f7f7f7f 0000000000000000 0101010101010101 0000000000000018 [ 8.031405] 3b00: 0000000000000018 0000000000000000 0000000000000000 ffff000000000000 [ 8.031406] 3b20: 0000000000087ffc 2fe48d76a78303f0 [ 8.031409] [<ffff000008899450>] pcc_mbox_request_channel+0x8c/0x160 [ 8.031410] [<ffff000008819dac>] xgene_slimpro_i2c_probe+0x1c0/0x378 [ 8.031413] [<ffff0000085e84dc>] platform_drv_probe+0x50/0xbc [ 8.031414] [<ffff0000085e68a4>] driver_probe_device+0x21c/0x2d0 [ 8.031416] [<ffff0000085e6a04>] __driver_attach+0xac/0xb0 [ 8.031417] [<ffff0000085e4a78>] bus_for_each_dev+0x58/0x98 [ 8.031418] [<ffff0000085e61e4>] driver_attach+0x20/0x28 [ 8.031419] [<ffff0000085e5e0c>] bus_add_driver+0x1c8/0x22c [ 8.031421] [<ffff0000085e7324>] driver_register+0x60/0xf4 [ 8.031422] [<ffff0000085e8420>] __platform_driver_register+0x4c/0x54 [ 8.031425] [<ffff000008e96dd0>] xgene_slimpro_i2c_driver_init+0x18/0x20 [ 8.031426] [<ffff000008083144>] do_one_initcall+0x38/0x124 [ 8.031429] [<ffff000008e50d0c>] kernel_init_freeable+0x190/0x22c [ 8.031431] [<ffff0000089eac30>] kernel_init+0x10/0xfc [ 8.031432] [<ffff000008082ec0>] ret_from_fork+0x10/0x50 [ 8.031434] Code: cb030e63 8b030013 b140067f 54fffda8 (f9400a61) [ 8.031448] ---[ end trace 14eb48a4e1e1f9fb ]--- Signed-off-by: Hoan Tran <hotran@apm.com> Acked-by: Prashanth Prakash <pprakash@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-07Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integrationLinus Torvalds4-6/+149
Pull mailbox updates from Jassi Brar: - Minor improvement : avoid requiring unnecessary startup/shutdown callback that many drivers seem to not need - New controller driver for Qualcomm's APCS IPC * 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: Introduce Qualcomm APCS IPC driver dt-bindings: mailbox: Introduce Qualcomm APCS global binding mailbox: Make startup and shutdown ops optional
2017-06-14mailbox: Introduce Qualcomm APCS IPC driverBjorn Andersson3-0/+139
This implements a driver that exposes the IPC bits found in the APCS Global block in various Qualcomm platforms. The bits are used to signal inter-processor communication signals from the application CPU to other masters. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-06-14mailbox: Make startup and shutdown ops optionalBjorn Andersson1-6/+10
Some mailbox hardware doesn't have to perform any additional operations on startup of shutdown, so make these optional. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-06-12ACPICA: Add support for new PCCT subtablesDavid E. Box1-5/+5
ACPICA commit e7b817e3c405a4fb9ae9ee7ae4992b8c1f20d284 Extended PCC Subspaces (types 3 and 4) Link: https://github.com/acpica/acpica/commit/e7b817e3 Signed-off-by: David E. Box <david.e.box@linux.intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-04-27mailbox: handle empty message in tx_tickSudeep Holla1-1/+4
We already check if the message is empty before calling the client tx_done callback. Calling completion on a wait event is also invalid if the message is empty. This patch moves the existing empty message check earlier. Fixes: 2b6d83e2b8b7 ("mailbox: Introduce framework for mailbox") Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-04-27mailbox: skip complete wait event if timer expiredSudeep Holla1-3/+3
If a wait_for_completion_timeout() call returns due to a timeout, complete() can get called after returning from the wait which is incorrect and can cause subsequent transmissions on a channel to fail. Since the wait_for_completion_timeout() sees the completion variable is non-zero caused by the erroneous/spurious complete() call, and it immediately returns without waiting for the time as expected by the client. This patch fixes the issue by skipping complete() call for the timer expiry. Fixes: 2b6d83e2b8b7 ("mailbox: Introduce framework for mailbox") Reported-by: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-04-27mailbox: always wait in mbox_send_message for blocking Tx modeSudeep Holla1-1/+1
There exists a race when msg_submit return immediately as there was an active request being processed which may have completed just before it's checked again in mbox_send_message. This will result in return to the caller without waiting in mbox_send_message even when it's blocking Tx. This patch fixes the issue by waiting for the completion always if Tx is in blocking mode. Fixes: 2b6d83e2b8b7 ("mailbox: Introduce framework for mailbox") Reported-by: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-03-29mailbox: Remove depends on COMPILE_TEST for BCM_FLEXRM_MBOXAnup Patel1-1/+1
The Broadcom FlexRM mailbox driver uses platform MSI support but not all ARCHs provide asm/msi.h. Due to this, we get compilation error in Broadcom FlexRM mailbox driver via linux/msi.h on ARCHs which lack asm/msi.h. This patch removes "depends on COMPILE_TEST" for Kconfig option BCM_FLEXRM_MBOX so that Broadcom FlexRM mailbox driver is only compiled for ARM64. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-03-28mailbox: check ->last_tx_done for NULL in case of timer-based pollingAlexey Klimov1-0/+6
It is allowed by code to register mailbox controller that sets txdone_poll flag to request timer-based polling with missed ->last_tx_done() method. If such thing happens and since presence of last_tx_done() is not checked it will fail in hrtimer callback function txdone_hrtimer() when first message will be transmitted. This patch adds check for this method and logging of error on registration of mailbox controller if it requested timer-based polling. Signed-off-by: Alexey Klimov <alexey.klimov@arm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-03-28mailbox: Add driver for Broadcom FlexRM ring managerAnup Patel3-0/+1608
Some of the Broadcom iProc SoCs have FlexRM ring manager which provides a ring-based programming interface to various offload engines (e.g. RAID, Crypto, etc). This patch adds a common mailbox driver for Broadcom FlexRM ring manager which can be shared by various offload engine drivers (implemented as mailbox clients). Reviewed-by: Ray Jui <ray.jui@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Pramod KUMAR <pramod.kumar@broadcom.com> Signed-off-by: Anup Patel <anup.patel@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-03-28mailbox: bcm-pdc: Add Northstar Plus support to PDC driverSteve Lin2-20/+50
Adds support for Northstar Plus (NS+) products to the PDC mailbox driver. The PDC driver was originally written to support the PDC ring manager in the Northstar2 (64-bit) device. The NS+ (32 bit device) uses an almost identical ring manager, though with a different name. We just need to check for the type of hardware in use, in order to write the appropriate interrupt configuration register. Also updated DMA width to be correct for both NS+ and NS2. Tested on NS+ and NS2. Signed-off-by: Steve Lin <steven.lin1@broadcom.com> Acked-by: Jon Mason <jon.mason@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-03-28mailbox: constify mbox_chan_ops structuresBhumika Goyal2-2/+2
Check for mbox_chan_ops structures that are only stored in the ops field of a mbox_controller structure. This field is of type const struct mbox_chan_ops *, so mbox_chan_ops structures having this property can be declared as const. Done using Coccinelle: @r1 disable optional_qualifier @ identifier i; position p; @@ struct mbox_chan_ops i@p = {...}; @ok1@ identifier r1.i; struct hi6220_mbox mbox; struct slimpro_mbox ctx; position p; @@ ( mbox.controller.ops=&i@p | ctx.mb_ctrl.ops=&i@p ) @bad@ position p!={r1.p,ok1.p}; identifier r1.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r1.i; @@ +const struct mbox_chan_ops i; File size details: text data bss dec hex filename 2310 248 0 2558 9fe drivers/mailbox/hi6220-mailbox.o 2366 192 0 2558 9fe drivers/mailbox/hi6220-mailbox.o 1500 248 0 1748 6d4 mailbox/mailbox-xgene-slimpro.o 1556 192 0 1748 6d4 mailbox/mailbox-xgene-slimpro.o Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-03-02sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>Ingo Molnar1-0/+1
Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-25ktime: Cleanup ktime_set() usageThomas Gleixner1-2/+1
ktime_set(S,N) was required for the timespec storage type and is still useful for situations where a Seconds and Nanoseconds part of a time value needs to be converted. For anything where the Seconds argument is 0, this is pointless and can be replaced with a simple assignment. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org>
2016-12-22Merge tag 'acpi-extra-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds1-4/+1
Pull more ACPI updates from Rafael Wysocki: "Here are new versions of two ACPICA changes that were deferred previously due to a problem they had introduced, two cleanups on top of them and the removal of a useless warning message from the ACPI core. Specifics: - Move some Linux-specific functionality to upstream ACPICA and update the in-kernel users of it accordingly (Lv Zheng) - Drop a useless warning (triggered by the lack of an optional object) from the ACPI namespace scanning code (Zhang Rui)" * tag 'acpi-extra-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / osl: Remove deprecated acpi_get_table_with_size()/early_acpi_os_unmap_memory() ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users ACPICA: Tables: Allow FADT to be customized with virtual address ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel ACPI: do not warn if _BQC does not exist
2016-12-22Merge branches 'acpica' and 'acpi-scan'Rafael J. Wysocki1-4/+1
* acpica: ACPI / osl: Remove deprecated acpi_get_table_with_size()/early_acpi_os_unmap_memory() ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users ACPICA: Tables: Allow FADT to be customized with virtual address ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel * acpi-scan: ACPI: do not warn if _BQC does not exist
2016-12-21ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() usersLv Zheng1-4/+1
This patch removes the users of the deprectated APIs: acpi_get_table_with_size() early_acpi_os_unmap_memory() The following APIs should be used instead of: acpi_get_table() acpi_put_table() The deprecated APIs are invented to be a replacement of acpi_get_table() during the early stage so that the early mapped pointer will not be stored in ACPICA core and thus the late stage acpi_get_table() won't return a wrong pointer. The mapping size is returned just because it is required by early_acpi_os_unmap_memory() to unmap the pointer during early stage. But as the mapping size equals to the acpi_table_header.length (see acpi_tb_init_table_descriptor() and acpi_tb_validate_table()), when such a convenient result is returned, driver code will start to use it instead of accessing acpi_table_header to obtain the length. Thus this patch cleans up the drivers by replacing returned table size with acpi_table_header.length, and should be a no-op. Reported-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-12-20Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integrationLinus Torvalds3-234/+407
Pull mailbox updates from Jassi Brar: - new features (poll and SRAM usage) added to the mailbox-test driver - major update of Broadcom's PDC controller driver - minor fix for auto-loading test and STI driver modules * 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: mailbox-test: allow reserved areas in SRAM mailbox: mailbox-test: add support for fasync/poll mailbox: bcm-pdc: Remove unnecessary void* casts mailbox: bcm-pdc: Simplify interrupt handler logic mailbox: bcm-pdc: Performance improvements mailbox: bcm-pdc: Don't use iowrite32 to write DMA descriptors mailbox: bcm-pdc: Convert from threaded IRQ to tasklet mailbox: bcm-pdc: Try to improve branch prediction mailbox: bcm-pdc: streamline rx code mailbox: bcm-pdc: Convert from interrupts to poll for tx done mailbox: bcm-pdc: PDC driver leaves debugfs files after removal mailbox: bcm-pdc: Changes so mbox client can be removed / re-inserted mailbox: bcm-pdc: Use octal permissions rather than symbolic mailbox: sti: Fix module autoload for OF registration mailbox: mailbox-test: Fix module autoload
2016-12-19mailbox: mailbox-test: allow reserved areas in SRAMSudeep Holla1-2/+10
When CONFIG_SRAM is enable and the SRAM region is found, the entire SRAM region resource is requested and marked as occupied by SRAM driver even if certain parts of regions is marked reserved. It's quite possible that a small region of the SRAM is reserved for all the mailbox communication and hence it may fail to request the region as it's already marked busy region. This patch tries to just do a ioremap of this mailbox memory region if it finds it busy. Cc: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: mailbox-test: add support for fasync/pollSudeep Holla1-8/+71
Currently the read operation on the message debug file returns error if there's no data ready to be read. It expects the userspace to retry if it fails. Since the mailbox response could be asynchronous, it would be good to add support to block the read until the data is available. We can also implement poll file operations so that the userspace can wait to become ready to perform any I/O. This patch implements the poll and fasync file operation callback for the test mailbox device. Cc: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: Remove unnecessary void* castsRob Rice1-21/+20
Remove unnecessary void* casts in register writes. Fix two other minor formatting issues. Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Reviewed-by: Jon Mason <jon.mason@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: Simplify interrupt handler logicRob Rice1-25/+13
Earlier versions of the PDC driver registered for both transmit and receive interrupts. The hard IRQ handler had to communicate to the soft handler which interrupt(s) had occurred. The PDC driver no longer registers for tx interrupts. So there is no reason to save the intstatus. So remove the intstatus member of the PDC state. Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: Performance improvementsRob Rice1-36/+49
Three changes to improve performance in the PDC driver: - disable and reenable interrupts while the interrupt handler is running - update rxin and txin descriptor indexes more efficiently - group receive descriptor context into a structure and keep context in a single array rather than five to improve locality of reference Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: Don't use iowrite32 to write DMA descriptorsRob Rice1-12/+11
In PDC driver, it is not necessary to use iowrite32() when writing DMA descriptors to the transmit and receive rings. The ring memory is in host memory. So convert to normal assignment statements. Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: Convert from threaded IRQ to taskletRob Rice1-32/+25
Previously used threaded IRQs in the PDC driver to defer processing the rx DMA ring after getting an rx done interrupt. Instead, use a tasklet at normal priority for deferred processing. Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: Try to improve branch predictionRob Rice1-13/+13
Use likely/unlikely directives to improve branch prediction. Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: streamline rx codeRob Rice1-60/+48
Remove the unnecessary rmb() from the receive path. If the rx ring has multiple messages ready, avoid reading last_rx_curr multiple times from the register. Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: bcm-pdc: Convert from interrupts to poll for tx doneRob Rice1-62/+145
The PDC driver is a mailbox controller. A mailbox controller can report that a mailbox message has been "transmitted" either when a tx interrupt fires or by having the mailbox framework poll. This commit converts the PDC driver to the poll method. We found that the tx interrupt happens when the descriptors are read by the SPU hw. Thus, the interrupt method does not allow more than one tx message in the PDC tx DMA ring at a time. To keep the SPU hw busy, we would like to keep the tx ring full under heavy load. With the poll method, the PDC driver responds that the previous message has been transmitted if the tx ring has space for another message. SPU request messages take a variable number of descriptors. If 15 descriptors are available, there is a good chance another message will fit. Also increased the ring size from 128 to 512 descriptors. With this change, I found the PDC driver hangs on its spinlock under heavy load. The PDC spinlock is not required; so I removed it. Calls to pdc_send_data() are already synchronized because of the channel spinlock in the mailbox framework. Other references to ring indexes should not require locking because they only written on either the tx or rx side. Signed-off-by: Rob Rice <rob.rice@broadcom.com> Reviewed-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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