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2017-06-09drivers/fsi: Add tracepoints for low-level operationsJeremy Kerr2-6/+148
Trace low level read and write FSI bus operations. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: expose direct-access slave APIJeremy Kerr2-6/+36
Allow drivers to access the slave address ranges. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add sysfs files for FSI master & slave accessesJeremy Kerr1-0/+116
This change adds a 'raw' file for reads & writes, and a 'term' file for the TERM command, and a 'break' file for issuing a BREAK. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add client driver register utilitiesChristopher Bostic2-0/+29
Add driver_register and driver_unregister wrappers for FSI. Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add documentation for GPIO bindingsChristopher Bostic1-0/+24
Add fsi master gpio device tree binding documentation. Includes changes from Jeremy Kerr <jk@ozlabs.org>. Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add master unscanChristopher Bostic1-0/+44
Allow a master to undo a previous scan. Should a master scan a bus twice it will need to ensure it doesn't double register any previously detected device. Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> ---- v7 - Unscan when unregistering master - Remove leading '__'s from function names - Return fail state for sysfs rescan file Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add device read/write/peek APIJeremy Kerr2-2/+55
This change introduces the fsi device API: simple read, write and peek accessors for the devices' address spaces. Includes contributions from Christopher Bostic <cbostic@linux.vnet.ibm.com> and Edward A. James <eajames@us.ibm.com>. Signed-off-by: Edward A. James <eajames@us.ibm.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: scan slaves & register devicesJeremy Kerr2-1/+131
Now that we have fsi_slave devices, scan each for endpoints, and register them on the fsi bus. Includes contributions from Christopher Bostic <cbostic@linux.vnet.ibm.com>. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Set slave SMODE to init communicationChristopher Bostic1-0/+75
Set CFAM to appropriate ID so that the controlling master can manage link memory ranges. Add slave engine register definitions. Includes changes from Jeremy Kerr <jk@ozlabs.org>. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Implement slave initialisationJeremy Kerr2-2/+66
Implement fsi_slave_init: if we can read a chip ID, create fsi_slave devices and register with the driver core. Includes changes from Christopher Bostic <cbostic@linux.vnet.ibm.com>. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Set up links for slave communicationChristopher Bostic1-2/+35
Enable each link and send a break command, and try to detect a slave by reading from the SMODE register. Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add slave & master read/write APIsJeremy Kerr1-0/+92
Introduce functions to perform reads/writes on the slave address space; these simply pass the request on the slave's master with the correct link and slave ID. We implement these on top of similar helpers for the master. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09lib: Add crc4 moduleJeremy Kerr4-0/+63
Add a little helper for crc4 calculations. This works 4-bits-at-a-time, using a simple table approach. We will need this in the FSI core code, as well as any master implementations that need to calculate CRCs in software. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add empty master scanJeremy Kerr1-2/+23
When a new fsi master is added, we will need to scan its links, and slaves attached to those links. This change introduces a little shell to iterate the links, which we will populate with the actual slave scan in a later change. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add slave definitionJeremy Kerr1-0/+10
Add the initial fsi slave device, which is private to the core code. This will be a child of the master, and parent to endpoint devices. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09drivers/fsi: Add fsi master definitionJeremy Kerr2-0/+76
Add a `struct fsi_master` to represent a FSI master controller. FSI master drivers register one of these structs to provide device-specific of the standard operations: read/write/term/break and link control. Includes changes from Edward A. James <eajames@us.ibm.com> & Jeremy Kerr <jk@ozlabs.org>. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-base: disable CONFIG_NFSD and CONFIG_NFS_FSRoberto Pereira1-0/+2
Disable Network file system support. Reviewed-at: https://android-review.googlesource.com/#/c/409559/ Signed-off-by: Roberto Pereira <rpere@google.com> [AmitP: cherry-picked this change from Android common kernel and updated commit message] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-base: add CGROUP_BPFChenbo Feng1-0/+1
Add CONFIG_CGROUP_BPF as a default configuration in android base config since it is used to replace XT_QTAGUID in future. Reviewed-at: https://android-review.googlesource.com/#/c/400374/ Signed-off-by: Chenbo Feng <fengc@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-base: add CONFIG_MODULES optionGreg Kroah-Hartman1-1/+3
This adds CONFIG_MODULES, CONFIG_MODULE_UNLOAD, and CONFIG_MODVERSIONS which are required by the O release. Reviewed-at: https://android-review.googlesource.com/#/c/364554/ Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-base: add CONFIG_IKCONFIG optionGreg Kroah-Hartman1-0/+2
This adds CONFIG_IKCONFIG and CONFIG_IKCONFIG_PROC options, which are a requirement for the O release. Reviewed-at: https://android-review.googlesource.com/#/c/364553/ Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-recommended: enable CONFIG_CPU_SW_DOMAIN_PANSami Tolvanen1-1/+2
Enable CPU domain PAN to ensure that normal kernel accesses are unable to access userspace addresses. Reviewed-at: https://android-review.googlesource.com/#/c/334035/ Signed-off-by: Sami Tolvanen <samitolvanen@google.com> [AmitP: cherry-picked this change from Android common kernel, updated the commit message and re-placed the CONFIG_STRICT_KERNEL_RWX config in sorted order] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-base: disable CONFIG_USELIB and CONFIG_FHANDLEMax Shi1-0/+2
Turn off the two kernel configs to disable related system ABI. Reviewed-at: https://android-review.googlesource.com/#/c/264976/ Signed-off-by: Max Shi <meixuanshi@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-recommended: enable CONFIG_ARM64_SW_TTBR0_PANSami Tolvanen1-0/+1
Enable PAN emulation using TTBR0_EL1 switching. Reviewed-at: https://android-review.googlesource.com/#/c/325997/ Signed-off-by: Sami Tolvanen <samitolvanen@google.com> [AmitP: cherry-picked this change from Android common kernel and updated the commit message] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09config: android-recommended: enable fstack-protector-strongJeff Vander Stoep1-0/+1
If compiler has stack protector support, set CONFIG_CC_STACKPROTECTOR_STRONG. Reviewed-at: https://android-review.googlesource.com/#/c/238388/ Signed-off-by: Jeff Vander Stoep <jeffv@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09arm64: dts: qcom: msm8916: Add debug unitLeo Yan1-0/+32
Add debug unit on Qualcomm msm8916 based platforms, including the DragonBoard 410c board. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Acked-by: Andy Gross <andy.gross@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09arm64: dts: hi6220: register debug moduleLeo Yan1-0/+64
Bind debug module driver for Hi6220. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Acked-by: Wei Xu <xuwei5@hisilicon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: add support for CPU debug moduleLeo Yan3-0/+715
Coresight includes debug module and usually the module connects with CPU debug logic. ARMv8 architecture reference manual (ARM DDI 0487A.k) has description for related info in "Part H: External Debug". Chapter H7 "The Sample-based Profiling Extension" introduces several sampling registers, e.g. we can check program counter value with combined CPU exception level, secure state, etc. So this is helpful for analysis CPU lockup scenarios, e.g. if one CPU has run into infinite loop with IRQ disabled. In this case the CPU cannot switch context and handle any interrupt (including IPIs), as the result it cannot handle SMP call for stack dump. This patch is to enable coresight debug module, so firstly this driver is to bind apb clock for debug module and this is to ensure the debug module can be accessed from program or external debugger. And the driver uses sample-based registers for debug purpose, e.g. when system triggers panic, the driver will dump program counter and combined context registers (EDCIDSR, EDVIDSR); by parsing context registers so can quickly get to know CPU secure state, exception level, etc. Some of the debug module registers are located in CPU power domain, so this requires the CPU power domain stays on when access related debug registers, but the power management for CPU power domain is quite dependent on SoC integration for power management. For the platforms which with sane power controller implementations, this driver follows the method to set EDPRCR to try to pull the CPU out of low power state and then set 'no power down request' bit so the CPU has no chance to lose power. If the SoC has not followed up this design well for power management controller, the user should use the command line parameter or sysfs to constrain all or partial idle states to ensure the CPU power domain is enabled and access coresight CPU debug component safely. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: refactor with function of_coresight_get_cpuLeo Yan2-15/+31
This is refactor to add function of_coresight_get_cpu(), so it's used to retrieve CPU id for coresight component. Finally can use it as a common function for multiple places. Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: of_get_coresight_platform_data: Add missing of_node_putSuzuki K Poulose1-7/+10
The of_get_coresight_platform_data iterates over the possible CPU nodes to find a given cpu phandle. However it does not drop the reference to the node pointer returned by the of_get_coresight_platform_data. This patch also introduces another minor fix is to use of_cpu_device_node_get() to replace of_get_cpu_node(). Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> [Leo: minor tweaks for of_get_coresight_platform_data] Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09MAINTAINERS: update file entries for Coresight subsystemLeo Yan1-0/+2
Update document file entries for Coresight debug module. Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09doc: Add coresight_cpu_debug.enable to kernel-parameters.txtLeo Yan1-0/+7
Add coresight_cpu_debug.enable to kernel-parameters.txt, this flag is used to enable/disable the CPU sampling based debugging. Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09doc: Add documentation for Coresight CPU debugLeo Yan1-0/+175
Add detailed documentation for Coresight CPU debug driver, which contains the info for driver implementation, Mike Leach excellent summary for "clock and power domain". At the end some examples on how to enable the debugging functionality are provided. Suggested-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: bindings for CPU debug moduleLeo Yan1-0/+49
According to ARMv8 architecture reference manual (ARM DDI 0487A.k) Chapter 'Part H: External debug', the CPU can integrate debug module and it can support self-hosted debug and external debug. Especially for supporting self-hosted debug, this means the program can access the debug module from mmio region; and usually the mmio region is integrated with coresight. So add document for binding debug component, includes binding to APB clock; and also need specify the CPU node which the debug module is dedicated to specific CPU. Suggested-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: tmc: Configure DMA mask appropriatelyRobin Murphy1-0/+7
Before making any DMA API calls, the ETR driver should really be setting its masks to ensure that DMA is possible. Especially since it can address more than the 32-bit default mask set by the AMBA bus code. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: etb10: Fix a typo in a comment lineMarkus Elfring1-1/+1
Delete a character in this description for a condition check. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: etb10: Delete an error message for a failed memory allocation in ↵Markus Elfring1-4/+1
etb_probe() Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: use const for device_node structuresLeo Yan2-6/+8
Almost low level functions from open firmware have used const to qualify device_node structures, so add const for device_node parameters in of_coresight related functions. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: tmc: minor fix for output logLeo Yan1-8/+17
In current code the output logs are not well symmetric for sink and link enabling and disabling. This patch is to fix that so can output paired logs. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: etm_perf: Fix using uninitialised workSuzuki K Poulose1-2/+1
With 4.11-rc4, the following command triggers a WARN_ON, when a sink is not enabled. perf record -e cs_etm/@20010000.etf/ [88286.547741] ------------[ cut here ]------------ [88286.552332] WARNING: CPU: 3 PID: 2156 at kernel/workqueue.c:1442 __queue_work+0x29c/0x3b8 [88286.560427] Modules linked in: [88286.563451] [88286.564928] CPU: 3 PID: 2156 Comm: perf_v4.11 Not tainted 4.11.0-rc4 #217 [88286.573453] Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Aug 15 2016 [88286.584128] task: ffff80097597c200 task.stack: ffff8009768b0000 [88286.589990] PC is at __queue_work+0x29c/0x3b8 [88286.594303] LR is at __queue_work+0x104/0x3b8 [88286.598614] pc : [<ffff0000080d8c7c>] lr : [<ffff0000080d8ae4>] pstate: a00001c5 [88286.605934] sp : ffff8009768b3aa0 [88286.609212] x29: ffff8009768b3aa0 x28: ffff80097ff3da00 [88286.614477] x27: ffff80097ff89c00 x26: ffff8009751b0e00 [88286.619741] x25: ffff000008c9f000 x24: 0000000000000003 [88286.625004] x23: 0000000000000040 x22: ffff000008d3dab8 [88286.630268] x21: ffff800977804400 x20: 0000000000000007 [88286.635532] x19: ffff000008c54000 x18: 0000fffff9185160 [88286.640795] x17: 0000ffffb33d9a38 x16: ffff000008088270 [88286.646059] x15: 0000ffffb345b590 x14: 0000000000000000 [88286.651322] x13: 0000000000000004 x12: 0000000000000040 [88286.656586] x11: 0000000000000068 x10: 0000000000000000 [88286.661849] x9 : ffff800977400028 x8 : 0000000000000000 [88286.667113] x7 : 0000000000000000 x6 : ffff0000080d8ae4 [88286.672376] x5 : 0000000000000000 x4 : 0000000000000080 [88286.677639] x3 : 0000000000000000 x2 : 0000000000000000 [88286.682903] x1 : 0000000000000000 x0 : ffff8009751b0e08 [88286.688166] [88286.689638] ---[ end trace 31633f18fd33d4cb ]--- [88286.694206] Call trace: [88286.696627] Exception stack(0xffff8009768b38d0 to 0xffff8009768b3a00) [88286.703004] 38c0: ffff000008c54000 0001000000000000 [88286.710757] 38e0: ffff8009768b3aa0 ffff0000080d8c7c ffff8009768b3b50 ffff80097ff8a5b0 [88286.718511] 3900: 0000800977325000 0000000000000000 0000000000000040 ffff80097ffc6180 [88286.726264] 3920: ffff8009768b3940 ffff0000088a8694 ffff80097ffc5800 0000000000000000 [88286.734017] 3940: ffff8009768b3960 ffff0000081919c0 ffff80097ffc5280 0000000000000001 [88286.741771] 3960: ffff8009768b3a50 ffff00000819206c ffff8009751b0e08 0000000000000000 [88286.749523] 3980: 0000000000000000 0000000000000000 0000000000000080 0000000000000000 [88286.757277] 39a0: ffff0000080d8ae4 0000000000000000 0000000000000000 ffff800977400028 [88286.765029] 39c0: 0000000000000000 0000000000000068 0000000000000040 0000000000000004 [88286.772783] 39e0: 0000000000000000 0000ffffb345b590 ffff000008088270 0000ffffb33d9a38 [88286.780537] [<ffff0000080d8c7c>] __queue_work+0x29c/0x3b8 [88286.785883] [<ffff0000080d8df8>] queue_work_on+0x60/0x78 [88286.791146] [<ffff000008764c68>] etm_setup_aux+0x178/0x238 [88286.796578] [<ffff000008183600>] rb_alloc_aux+0x228/0x310 [88286.801925] [<ffff00000817e564>] perf_mmap+0x404/0x5a8 [88286.807015] [<ffff0000081c60cc>] mmap_region+0x394/0x5c0 [88286.812276] [<ffff0000081c654c>] do_mmap+0x254/0x388 [88286.817191] [<ffff0000081a989c>] vm_mmap_pgoff+0xbc/0xe0 [88286.822452] [<ffff0000081c3ffc>] SyS_mmap_pgoff+0xac/0x228 [88286.827884] [<ffff000008088288>] sys_mmap+0x18/0x28 [88286.832714] [<ffff000008082f30>] el0_svc_naked+0x24/0x28 The patch makes sure that the event_data->work is initialised properly before we could possibly use it. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Tested-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: Fix reference count for software sourcesSuzuki K Poulose1-2/+13
For software sources (i.e STM), there could be multiple agents generating the trace data, unlike the ETMs. So we need to properly do the accounting for the active number of users to disable the device when the last user goes away. Right now, the reference counting is broken for sources as we skip the actions when we detect that the source is enabled. This patch fixes the problem by adding the refcounting for software sources, even when they are enabled. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Reported-by: Robert Walker <robert.walker@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: Disable the path only when the source is disabledSuzuki K Poulose1-6/+13
With a coresight tracing session, the components along the path from the source to sink are disabled after the source is disabled. However, if the source was not actually disabled due to active users, we should not disable the components in the path. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: fix spelling mistake: "missmatch" -> "mismatch"Colin Ian King1-1/+1
Trivial fix to spelling mistake in tb_sw_warn warning message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09MAINTAINERS: Add maintainers for Thunderbolt driverMika Westerberg1-0/+3
We will be helping Andreas to maintain the Thunderbolt driver. Signed-off-by: Michael Jamet <michael.jamet@intel.com> Signed-off-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: Add documentation how Thunderbolt bus can be usedMika Westerberg2-0/+200
Since there are no such tool yet that handles all the low-level details of connecting devices and upgrading their firmware, add a small document that shows how the Thunderbolt bus can be used directly from command line. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Michael Jamet <michael.jamet@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: Add support for host and device NVM firmware upgradeMika Westerberg8-23/+706
Starting from Intel Falcon Ridge the NVM firmware can be upgraded by using DMA configuration based mailbox commands. If we detect that the host or device (device support starts from Intel Alpine Ridge) has the DMA configuration based mailbox we expose NVM information to the userspace as two separate Linux NVMem devices: nvm_active and nvm_non_active. The former is read-only portion of the active NVM which firmware upgrade tools can be use to find out suitable NVM image if the device identification strings are not enough. The latter is write-only portion where the new NVM image is to be written by the userspace. It is up to the userspace to find out right NVM image (the kernel does very minimal validation). The ICM firmware itself authenticates the new NVM firmware and fails the operation if it is not what is expected. We also expose two new sysfs files per each switch: nvm_version and nvm_authenticate which can be used to read the active NVM version and start the upgrade process. We also introduce safe mode which is the mode a switch goes when it does not have properly authenticated firmware. In this mode the switch only accepts a couple of commands including flashing a new NVM firmware image and triggering power cycle. This code is based on the work done by Amir Levy and Michael Jamet. Signed-off-by: Michael Jamet <michael.jamet@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: Add support for Internal Connection Manager (ICM)Mika Westerberg12-12/+1805
Starting from Intel Falcon Ridge the internal connection manager running on the Thunderbolt host controller has been supporting 4 security levels. One reason for this is to prevent DMA attacks and only allow connecting devices the user trusts. The internal connection manager (ICM) is the preferred way of connecting Thunderbolt devices over software only implementation typically used on Macs. The driver communicates with ICM using special Thunderbolt ring 0 (control channel) messages. In order to handle these messages we add support for the ICM messages to the control channel. The security levels are as follows: none - No security, all tunnels are created automatically user - User needs to approve the device before tunnels are created secure - User need to approve the device before tunnels are created. The device is sent a challenge on future connects to be able to verify it is actually the approved device. dponly - Only Display Port and USB tunnels can be created and those are created automatically. The security levels are typically configurable from the system BIOS and by default it is set to "user" on many systems. In this patch each Thunderbolt device will have either one or two new sysfs attributes: authorized and key. The latter appears for devices that support secure connect. In order to identify the device the user can read identication information, including UUID and name of the device from sysfs and based on that make a decision to authorize the device. The device is authorized by simply writing 1 to the "authorized" sysfs attribute. This is following the USB bus device authorization mechanism. The secure connect requires an additional challenge step (writing 2 to the "authorized" attribute) in future connects when the key has already been stored to the NVM of the device. Non-ICM systems (before Alpine Ridge) continue to use the existing functionality and the security level is set to none. For systems with Alpine Ridge, even on Apple hardware, we will use ICM. This code is based on the work done by Amir Levy and Michael Jamet. Signed-off-by: Michael Jamet <michael.jamet@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: Do not touch the hardware if the NHI is gone on resumeMika Westerberg2-0/+15
On PCs the NHI host controller is only present when there is a device connected. When the last device is disconnected the host controller will dissappear shortly (within 10s). Now if that happens when we are suspended we should not try to touch the hardware anymore, so add a flag for this and check it before we re-enable rings. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Michael Jamet <michael.jamet@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: Add support for DMA configuration based mailboxMika Westerberg6-2/+644
The DMA (NHI) port of a switch provides access to the NVM of the host controller (and devices starting from Intel Alpine Ridge). The NVM contains also more complete DROM for the root switch including vendor and device identification strings. This will look for the DMA port capability for each switch and if found populates sw->dma_port. We then teach tb_drom_read() to read the DROM information from NVM if available for the root switch. The DMA port capability also supports upgrading the NVM for both host controller and devices which will be added in subsequent patches. This code is based on the work done by Amir Levy and Michael Jamet. Signed-off-by: Michael Jamet <michael.jamet@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: Store Thunderbolt generation in the switch structureMika Westerberg2-17/+40
In some cases it is useful to know what is the Thunderbolt generation the switch supports. This introduces a new field to struct switch that stores the generation of the switch based on the device ID. Unknown switches (there should be none) are assumed to be first generation to be on the safe side. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Michael Jamet <michael.jamet@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09thunderbolt: Add support for NHI mailboxMika Westerberg3-0/+85
The host controller includes two sets of registers that are used to communicate with the firmware. Add functions that can be used to access these registers. This code is based on the work done by Amir Levy and Michael Jamet. Signed-off-by: Michael Jamet <michael.jamet@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-20 22:38:33 +0000