Re: [PATCH v23 00/11] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer

From: Fu Wei
Date: Fri Mar 31 2017 - 23:49:48 EST

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In reply to: Xiongfeng Wang: "Re: [PATCH v23 00/11] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer"
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Hi Xiongfeng Wang,

On 1 April 2017 at 10:14, Xiongfeng Wang <wangxiongfeng2@xxxxxxxxxx> wrote:
>
>
> On 2017/4/1 1:50, fu.wei@xxxxxxxxxx wrote:
>> From: Fu Wei <fu.wei@xxxxxxxxxx>
>>
>> This patchset:
>> (1)Preparation for adding GTDT support in arm_arch_timer:
>> 1. Introduce a MMIO CNTFRQ helper.
>> 2. separate out device-tree code from arch_timer_detect_rate
>> 3. remove arch_timer_detect_rate use arch_timer_*get_cntfrq directly
>> 4. Refactor arch_timer_needs_probing, and move it into DT init call
>> 5. Introduce some new structs and refactor the MMIO timer init code
>> for reusing some common code.
>>
>> (2)Introduce ACPI GTDT parser: drivers/acpi/arm64/acpi_gtdt.c
>> Parse all kinds of timer in GTDT table of ACPI:arch timer,
>> memory-mapped timer and SBSA Generic Watchdog timer.
>> This driver can help to simplify all the relevant timer drivers,
>> and separate all the ACPI GTDT knowledge from them.
>>
>> (3)Simplify ACPI code for arm_arch_timer
>>
>> (4)Add GTDT support for ARM memory-mapped timer.
>>
>> This patchset has been tested on the following platforms with ACPI enabled:
>> (1)ARM Foundation v8 model
>>
>
> for arm_arch_timer(not memory-mapped) and sbsa watchdog part, Tested-by: wangxiongfeng2@xxxxxxxxxx

Great thanks for your testing :-)

>
>
>
>
>
> Thanks,
>
> Wang Xiongfeng
> .
>
>> Changelog:
>> v23: https://lkml.org/lkml/2017/3/31/
>> Rebase to git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arch-timer/cleanup
>> Improve the data struct of arch_timer_mem and arch_timer_mem_frame to
>> improve the parser of GT blocks and arch_timer_mem initualization.
>> Improve arch_timer_rate detection: sysreg frequency is primary in DT boot
>> Improve some comments in GTDT parser driver.
>> Improve acpi_gtdt_init function, and make a comment for the multiple calls.
>> Improve the unwinding for the irq of timers, when an error occurs.
>> Handle the case of virtual timer GSIV is 0.
>>
>> v22: https://lkml.org/lkml/2017/3/21/523
>> Rebase to git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arch-timer/cleanup
>> Only Introduce arch_timer_mem_get_cntfrq to get the frequency from mmio.
>> Merged patch 2,3(about arch_timer_detect_rate).
>> Keep arch_timer_rate, do NOT split it for different types of timer.
>> Improve memory-mapped timer support by comments and variable name:
>> data-->timer_mem
>> frame-->gtdt_frame
>> Delete zero check for SBSA watchdog irq.
>> Skip secure SBSA watchdog in GTDT driver.
>> Delete Kconfig modification for SBSA watchdog driver.
>> Delete no_irq, using nr_res instead.
>>
>> v21: https://lkml.org/lkml/2017/2/6/734
>> Introduce two functions to get the frequency from mmio and sysreg.
>> Remove arch_timer_detect_rate use arch_timer_get_*_freq directly
>> Split arch_timer_rate for different types of timer.
>> Skip secure timer frame in GTDT driver.
>> Rebase to git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arch-timer/cleanup
>> (The first 6 patches in v20 have been merged into arch-timer/cleanup branch)
>>
>> v20: https://lkml.org/lkml/2017/1/18/534
>> Reorder the first 4 patches and split the 4th patches.
>> Leave CNTHCTL_* as they originally were.
>> Fix the bug in arch_timer_select_ppi.
>> Split "Rework counter frequency detection" patch.
>> Rework the arch_timer_detect_rate function.
>> Improve the commit message of "Refactor MMIO timer probing".
>> Rebase to 4.10.0-rc4
>>
>> v19: https://lkml.org/lkml/2016/12/21/25
>> Fix a '\n' missing in a error message in arch_timer_mem_init.
>> Add "request_mem_region" for ioremapping cntbase, according to
>> f947ee1 clocksource/drivers/arm_arch_timer: Map frame with of_io_request_and_map()
>> Rebase to 4.9.0-gfb779ff
>>
>> v18: https://lkml.org/lkml/2016/12/8/446
>> Fix 8/15 patch problem of "int ret;" in arch_timer_acpi_init.
>> Rebase to 4.9.0-rc8-g9269898
>>
>> v17: https://lkml.org/lkml/2016/11/25/140
>> Take out some cleanups from 4/15.
>> Merge 5/15 and 6/15, improve PPI determination code,
>> improve commit message.
>> Rework counter frequency detection.
>> Move arch_timer_needs_of_probing into DT init call.
>> Move Platform Timer scan loop back to timer init call to avoid allocating
>> and free memory.
>> Improve all the exported functions' comment.
>>
>> v16: https://lkml.org/lkml/2016/11/16/268
>> Fix patchset problem about static enum ppi_nr of 01/13 in v15.
>> Refactor arch_timer_detect_rate.
>> Refactor arch_timer_needs_probing.
>>
>> v15: https://lkml.org/lkml/2016/11/15/366
>> Re-order patches
>> Add arm_arch_timer refactoring patches to prepare for GTDT:
>> 1. rename some enums and defines, and some cleanups
>> 2. separate out arch_timer_uses_ppi init code and fix a potential bug
>> 3. Improve some new structs, refactor the timer init code.
>> Since the some structs have been changed, GTDT parser for memory-mapped
>> timer and SBSA Generic Watchdog timer have been update.
>>
>> v14: https://lkml.org/lkml/2016/9/28/573
>> Separate memory-mapped timer GTDT support into two patches
>> 1. Refactor the timer init code to prepare for GTDT
>> 2. Add GTDT support for memory-mapped timer
>>
>> v13: http://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1231717.html
>> Improve arm_arch_timer code for memory-mapped
>> timer GTDT support, refactor original memory-mapped timer
>> dt support for reusing some common code.
>>
>> v12: https://lkml.org/lkml/2016/9/13/250
>> Rebase to latest Linux 4.8-rc6
>> Delete the confusing "skipping" in the error message.
>>
>> V11: https://lkml.org/lkml/2016/9/6/354
>> Rebase to latest Linux 4.8-rc5
>> Delete typedef (suggested by checkpatch.pl)
>>
>> V10: https://lkml.org/lkml/2016/7/26/215
>> Drop the "readq" patch.
>> Rebase to latest Linux 4.7.
>>
>> V9: https://lkml.org/lkml/2016/7/25/345
>> Improve pr_err message in acpi gtdt driver.
>> Update Commit message for 7/9
>> shorten the irq mapping function name
>> Improve GTDT driver for memory-mapped timer
>>
>> v8: https://lkml.org/lkml/2016/7/19/660
>> Improve "pr_fmt(fmt)" definition: add "ACPI" in front of "GTDT",
>> and also improve printk message.
>> Simplify is_timer_block and is_watchdog.
>> Merge acpi_gtdt_desc_init and gtdt_arch_timer_init into acpi_gtdt_init();
>> Delete __init in include/linux/acpi.h for GTDT API
>> Make ARM64 select GTDT.
>> Delete "#include <linux/module.h>" from acpi_gtdt.c
>> Simplify GT block parse code.
>>
>> v7: https://lkml.org/lkml/2016/7/13/769
>> Move the GTDT driver to drivers/acpi/arm64
>> Add add the ARM64-specific ACPI Support maintainers in MAINTAINERS
>> Merge 3 patches of GTDT parser driver.
>> Fix the for_each_platform_timer bug.
>>
>> v6: https://lkml.org/lkml/2016/6/29/580
>> split the GTDT driver to 4 parts: basic, arch_timer, memory-mapped timer,
>> and SBSA Generic Watchdog timer
>> Improve driver by suggestions and example code from Daniel Lezcano
>>
>> v5: https://lkml.org/lkml/2016/5/24/356
>> Sorting out all patches, simplify the API of GTDT driver:
>> GTDT driver just fills the data struct for arm_arch_timer driver.
>>
>> v4: https://lists.linaro.org/pipermail/linaro-acpi/2016-March/006667.html
>> Delete the kvm relevant patches
>> Separate two patches for sorting out the code for arm_arch_timer.
>> Improve irq info export code to allow missing irq info in GTDT table.
>>
>> v3: https://lkml.org/lkml/2016/2/1/658
>> Improve GTDT driver code:
>> (1)improve pr_* by defining pr_fmt(fmt)
>> (2)simplify gtdt_sbsa_gwdt_init
>> (3)improve gtdt_arch_timer_data_init, if table is NULL, it will try
>> to get GTDT table.
>> Move enum ppi_nr to arm_arch_timer.h, and add enum spi_nr.
>> Add arm_arch_timer get ppi from DT and GTDT support for kvm.
>>
>> v2: https://lkml.org/lkml/2015/12/2/10
>> Rebase to latest kernel version(4.4-rc3).
>> Fix the bug about the config problem,
>> use CONFIG_ACPI_GTDT instead of CONFIG_ACPI in arm_arch_timer.c
>>
>> v1: The first upstreaming version: https://lkml.org/lkml/2015/10/28/553
>>
>> Fu Wei (11):
>> clocksource: arm_arch_timer: add MMIO CNTFRQ helper
>> clocksource: arm_arch_timer: split dt-only rate handling
>> clocksource: arm_arch_timer: refactor arch_timer_needs_probing
>> clocksource: arm_arch_timer: move arch_timer_needs_of_probing into DT
>> init call
>> clocksource: arm_arch_timer: add structs to describe MMIO timer
>> clocksource: arm_arch_timer: refactor MMIO timer probing.
>> acpi/arm64: Add GTDT table parse driver
>> clocksource: arm_arch_timer: simplify ACPI support code.
>> acpi/arm64: Add memory-mapped timer support in GTDT driver
>> clocksource: arm_arch_timer: add GTDT support for memory-mapped timer
>> acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver
>>
>> arch/arm64/Kconfig | 1 +
>> drivers/acpi/arm64/Kconfig | 3 +
>> drivers/acpi/arm64/Makefile | 1 +
>> drivers/acpi/arm64/gtdt.c | 406 +++++++++++++++++++++++++++++++++++
>> drivers/clocksource/arm_arch_timer.c | 338 ++++++++++++++++++-----------
>> include/clocksource/arm_arch_timer.h | 16 ++
>> include/linux/acpi.h | 7 +
>> 7 files changed, 648 insertions(+), 124 deletions(-)
>> create mode 100644 drivers/acpi/arm64/gtdt.c
>>
>

--
Best regards,

Fu Wei
Software Engineer
Red Hat

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In reply to: Xiongfeng Wang: "Re: [PATCH v23 00/11] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer"
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