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From: Matthias Kaehlcke <mka@chromium.org>
To: Lina Iyer <ilina@codeaurora.org>
Cc: andy.gross@linaro.org, david.brown@linaro.org,
	linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org,
	rnayak@codeaurora.org, bjorn.andersson@linaro.org,
	linux-kernel@vger.kernel.org, sboyd@kernel.org,
	evgreen@chromium.org, dianders@chromium.org
Subject: Re: [PATCH v7 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS
Date: Thu, 3 May 2018 15:06:51 -0700	[thread overview]
Message-ID: <20180503220651.GB19594@google.com> (raw)
In-Reply-To: <20180502193749.31004-7-ilina@codeaurora.org>

Hi Lina,

On Wed, May 02, 2018 at 01:37:45PM -0600, Lina Iyer wrote:
> Allow sleep and wake commands to be cleared from the respective TCSes,
> so that they can be re-populated.
> 
> Signed-off-by: Lina Iyer <ilina@codeaurora.org>
> ---
> 
> Changes in v7:
> 	- Move bitmap_zero() outside the loop
> 
> Changes in v6:
> 	- remove unnecessary locks around __tcs_invalidate
> 	- rename function to tcs_invaldiate
> 
> Changes in v4:
> 	- refactored the rphm_rsc_invalidate()
> ---
>  drivers/soc/qcom/rpmh-rsc.c | 45 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 45 insertions(+)
> 
> diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
> index 4e2144a14c31..42aedf2d80fe 100644
> --- a/drivers/soc/qcom/rpmh-rsc.c
> +++ b/drivers/soc/qcom/rpmh-rsc.c
> @@ -104,6 +104,51 @@ static struct tcs_group *get_tcs_of_type(struct rsc_drv *drv, int type)
>  	return &drv->tcs[type];
>  }
>  
> +static int tcs_invalidate(struct rsc_drv *drv, int type)
> +{
> +	int m;

nit: use tcs_id?

> +	struct tcs_group *tcs;
> +
> +	tcs = get_tcs_of_type(drv, type);
> +	if (IS_ERR(tcs))
> +		return PTR_ERR(tcs);
> +
> +	spin_lock(&tcs->lock);
> +	if (bitmap_empty(tcs->slots, MAX_TCS_SLOTS)) {
> +		spin_unlock(&tcs->lock);
> +		return 0;
> +	}
> +
> +	for (m = tcs->offset; m < tcs->offset + tcs->num_tcs; m++) {
> +		if (!tcs_is_free(drv, m)) {
> +			spin_unlock(&tcs->lock);
> +			return -EAGAIN;
> +		}
> +		write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, m, 0);
> +	}
> +	bitmap_zero(tcs->slots, MAX_TCS_SLOTS);

You didn't reply to (or address) my comment on v6:

It could occur that one or more TCSes are disabled, then tcs_is_free()
returns false for the next TCS and the function returns without having
updated tcs->slots for the TCSes that have been disabled.

  reply	other threads:[~2018-05-03 22:06 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-02 19:37 [PATCH v7 00/10] drivers/qcom: add RPMH communication support Lina Iyer
2018-05-02 19:37 ` [PATCH v7 01/10] drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs Lina Iyer
2018-05-02 19:37 ` [PATCH v7 02/10] dt-bindings: introduce RPMH RSC bindings for Qualcomm SoCs Lina Iyer
2018-05-02 20:37   ` Stephen Boyd
2018-05-02 19:37 ` [PATCH v7 03/10] drivers: qcom: rpmh-rsc: log RPMH requests in FTRACE Lina Iyer
2018-05-02 19:45   ` Steven Rostedt
2018-05-02 19:37 ` [PATCH v7 04/10] drivers: qcom: rpmh: add RPMH helper functions Lina Iyer
2018-05-03 20:26   ` Doug Anderson
2018-05-04 20:50     ` Matthias Kaehlcke
2018-05-08 16:05     ` ilina
2018-05-10 22:37       ` Doug Anderson
2018-05-11 15:06         ` Lina Iyer
2018-05-11 20:14           ` Doug Anderson
2018-05-14 15:00             ` Lina Iyer
2018-05-02 19:37 ` [PATCH v7 05/10] drivers: qcom: rpmh-rsc: write sleep/wake requests to TCS Lina Iyer
2018-05-03 21:35   ` Matthias Kaehlcke
2018-05-08 16:16     ` ilina
2018-05-02 19:37 ` [PATCH v7 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS Lina Iyer
2018-05-03 22:06   ` Matthias Kaehlcke [this message]
2018-05-08 16:14     ` ilina
2018-05-08 17:25       ` Matthias Kaehlcke
2018-05-02 19:37 ` [PATCH v7 07/10] drivers: qcom: rpmh: cache sleep/wake state requests Lina Iyer
2018-05-04 21:39   ` Matthias Kaehlcke
2018-05-02 19:37 ` [PATCH v7 08/10] drivers: qcom: rpmh: allow requests to be sent asynchronously Lina Iyer
2018-05-02 19:37 ` [PATCH v7 09/10] drivers: qcom: rpmh: add support for batch RPMH request Lina Iyer
2018-05-02 19:37 ` [PATCH v7 10/10] drivers: qcom: rpmh-rsc: allow active requests from wake TCS Lina Iyer

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