From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: mathieu.poirier@linaro.org
Cc: coresight@lists.linaro.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, mike.leach@linaro.org
Subject: Re: [RFC PATCH 06/14] coresight: Convert claim and lock operations to use access wrappers
Date: Fri, 31 Jul 2020 10:46:15 +0100 [thread overview]
Message-ID: <453196b1-7549-dca5-169a-eff98f8d720e@arm.com> (raw)
In-Reply-To: <20200730195450.GC3155687@xps15>
On 07/30/2020 08:54 PM, Mathieu Poirier wrote:
> On Wed, Jul 22, 2020 at 06:20:32PM +0100, Suzuki K Poulose wrote:
>> Convert the CoreSight CLAIM set/clear, LOCK/UNLOCK operations to
>> use the coresight device access abstraction.
>>
>> Mostly a mechanical change.
>>
>> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
>> Cc: Mike Leach <mike.leach@linaro.org>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
>> ---
>> drivers/hwtracing/coresight/coresight-catu.c | 14 ++--
>> .../hwtracing/coresight/coresight-cpu-debug.c | 26 ++++++--
>> .../hwtracing/coresight/coresight-cti-sysfs.c | 4 +-
>> drivers/hwtracing/coresight/coresight-cti.c | 30 +++++----
>> drivers/hwtracing/coresight/coresight-etb10.c | 20 +++---
>> .../coresight/coresight-etm3x-sysfs.c | 8 +--
>> drivers/hwtracing/coresight/coresight-etm3x.c | 44 ++++++++-----
>> drivers/hwtracing/coresight/coresight-etm4x.c | 44 ++++++++-----
>> .../hwtracing/coresight/coresight-funnel.c | 18 ++---
>> drivers/hwtracing/coresight/coresight-priv.h | 9 +--
>> .../coresight/coresight-replicator.c | 27 +++++---
>> drivers/hwtracing/coresight/coresight-stm.c | 46 ++++++++-----
>> .../hwtracing/coresight/coresight-tmc-etf.c | 36 ++++++----
>> .../hwtracing/coresight/coresight-tmc-etr.c | 19 +++---
>> drivers/hwtracing/coresight/coresight-tpiu.c | 9 +--
>> drivers/hwtracing/coresight/coresight.c | 66 +++++++++++--------
>> include/linux/coresight.h | 16 ++---
>> 17 files changed, 266 insertions(+), 170 deletions(-)
>>
...
>> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
>> index 67fc3e3b77d8..d61ffbfe0a5c 100644
>> --- a/drivers/hwtracing/coresight/coresight-funnel.c
>> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
>> @@ -52,13 +52,14 @@ static int dynamic_funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
>> {
>> u32 functl;
>> int rc = 0;
>> + struct coresight_device *csdev = drvdata->csdev;
>>
>> - CS_UNLOCK(drvdata->base);
>> + CS_UNLOCK(&csdev->access);
>>
>> functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
>> /* Claim the device only when we enable the first slave */
>> if (!(functl & FUNNEL_ENSx_MASK)) {
>> - rc = coresight_claim_device_unlocked(drvdata->base);
>> + rc = coresight_claim_device_unlocked(csdev);
>> if (rc)
>> goto done;
>> }
>> @@ -69,7 +70,7 @@ static int dynamic_funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
>> writel_relaxed(functl, drvdata->base + FUNNEL_FUNCTL);
>> writel_relaxed(drvdata->priority, drvdata->base + FUNNEL_PRICTL);
>> done:
>> - CS_LOCK(drvdata->base);
>> + CS_LOCK(&csdev->access);
>> return rc;
>> }
>>
>> @@ -101,8 +102,9 @@ static void dynamic_funnel_disable_hw(struct funnel_drvdata *drvdata,
>> int inport)
>> {
>> u32 functl;
>> + struct coresight_device *csdev = drvdata->csdev;
>
> Sometimes a csdev variable is declared, sometimes not as in get_funnel_ctrl_hw()
> below and this makes it hard to review all these changes. Please select a
> heuristic and keep with it. I prefer this version but not dead set on it.
Agreed, will change.
>
> Also please split in two, on for CS_LOCK/UNLOCK() and another one for the claim
> tag functions.
There is a minor dependency here. CS_LOCK/UNLOCK is issued from the
coresight_{dis}claim_device() versions. One option is to choose the
following order:
1) convert claim/disclaim to accept csdev.
And use csdev->access->base for CS_LOCK/UNLOCK.
2) Convert all CS_LOCK/UNLOCK to work on csdev->access.
I thought having this at one go might look better. But I agree, it is
better to split this one. I will give it a go.
Cheers
Suzuki
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next prev parent reply other threads:[~2020-07-31 9:43 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-22 17:20 [RFC PATCH 00/14] coresight: Support for ETMv4.4 system instructions Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 01/14] coresight: etm4x: Skip save/restore before device registration Suzuki K Poulose
2020-07-29 18:01 ` Mathieu Poirier
2020-07-30 14:45 ` Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 02/14] coresight: Introduce device access abstraction Suzuki K Poulose
2020-07-29 19:56 ` Mathieu Poirier
2020-07-30 14:58 ` Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 03/14] coresight: tpiu: Use coresight " Suzuki K Poulose
2020-07-29 21:01 ` Mathieu Poirier
2020-07-31 11:36 ` Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 04/14] coresight: etm4x: Free up argument of etm4_init_arch_data Suzuki K Poulose
2020-07-30 17:31 ` Mathieu Poirier
2020-07-31 9:39 ` Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 05/14] coresight: Convert coresight_timeout to use access abstraction Suzuki K Poulose
2020-07-30 18:00 ` Mathieu Poirier
2020-07-22 17:20 ` [RFC PATCH 06/14] coresight: Convert claim and lock operations to use access wrappers Suzuki K Poulose
2020-07-30 19:54 ` Mathieu Poirier
2020-07-31 9:46 ` Suzuki K Poulose [this message]
2020-07-22 17:20 ` [RFC PATCH 07/14] coresight: etm4x: Always read the registers on the host CPU Suzuki K Poulose
2020-07-30 19:56 ` Mathieu Poirier
2020-07-22 17:20 ` [RFC PATCH 08/14] coresight: etm4x: Convert all register accesses Suzuki K Poulose
2020-07-30 20:20 ` Mathieu Poirier
2020-07-31 9:49 ` Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 09/14] coresight: etm4x: Add sysreg access helpers Suzuki K Poulose
2020-07-30 21:41 ` Mathieu Poirier
2020-07-31 9:51 ` Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 10/14] coresight: etm4x: Define DEVARCH register fields Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 11/14] coresight: etm4x: Detect system register access support Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 12/14] coresight: etm4x: Refactor probing routine Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 13/14] coresight: etm4x: Add support for sysreg only devices Suzuki K Poulose
2020-07-22 17:20 ` [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units Suzuki K Poulose
2020-07-23 17:27 ` Rob Herring
2020-07-29 17:20 ` Mathieu Poirier
2020-07-30 16:38 ` Suzuki K Poulose
2020-08-10 20:14 ` Mathieu Poirier
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