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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 v6 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS
Date: Wed, 25 Apr 2018 15:11:23 -0700	[thread overview]
Message-ID: <20180425221123.GD243180@google.com> (raw)
In-Reply-To: <20180419221635.17849-7-ilina@codeaurora.org>

On Thu, Apr 19, 2018 at 04:16:31PM -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 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 d169f7da5422..170d4a10275d 100644
> --- a/drivers/soc/qcom/rpmh-rsc.c
> +++ b/drivers/soc/qcom/rpmh-rsc.c
> @@ -101,6 +101,51 @@ 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;
> +	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);

Shouldn't this only clear the slots corresponding to 'm'?

If resetting the entire bitmap is really intended it could be done
once after the loop, though the bitmap might be left in an
inconsistent state if a TCS is still in use.

  reply	other threads:[~2018-04-25 22:11 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-19 22:16 [PATCH v6 00/10] drivers/qcom: add RPMH communication support Lina Iyer
2018-04-19 22:16 ` [PATCH v6 01/10] drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs Lina Iyer
2018-04-19 22:16 ` [PATCH v6 02/10] dt-bindings: introduce RPMH RSC bindings for Qualcomm SoCs Lina Iyer
2018-05-01 23:45   ` Doug Anderson
2018-05-02 14:56     ` Lina Iyer
2018-04-19 22:16 ` [PATCH v6 03/10] drivers: qcom: rpmh-rsc: log RPMH requests in FTRACE Lina Iyer
2018-04-19 22:16 ` [PATCH v6 04/10] drivers: qcom: rpmh: add RPMH helper functions Lina Iyer
2018-04-26 18:05   ` Matthias Kaehlcke
2018-04-27 16:55     ` Lina Iyer
2018-04-19 22:16 ` [PATCH v6 05/10] drivers: qcom: rpmh-rsc: write sleep/wake requests to TCS Lina Iyer
2018-04-25 21:41   ` Matthias Kaehlcke
2018-04-27 17:39     ` Lina Iyer
2018-04-27 18:40       ` Matthias Kaehlcke
2018-04-27 19:45         ` Lina Iyer
2018-04-27 20:06           ` Matthias Kaehlcke
2018-04-27 21:32             ` Lina Iyer
2018-04-27 21:54               ` Matthias Kaehlcke
2018-04-27 23:24                 ` Doug Anderson
2018-05-01 16:10                   ` Lina Iyer
2018-05-01 16:42                     ` Doug Anderson
2018-05-01 17:35                       ` Lina Iyer
2018-05-01 16:45                     ` Matthias Kaehlcke
2018-04-19 22:16 ` [PATCH v6 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS Lina Iyer
2018-04-25 22:11   ` Matthias Kaehlcke [this message]
2018-04-27 16:44     ` Lina Iyer
2018-04-27 16:54       ` Matthias Kaehlcke
2018-04-19 22:16 ` [PATCH v6 07/10] drivers: qcom: rpmh: cache sleep/wake state requests Lina Iyer
2018-04-19 22:16 ` [PATCH v6 08/10] drivers: qcom: rpmh: allow requests to be sent asynchronously Lina Iyer
2018-04-19 22:16 ` [PATCH v6 09/10] drivers: qcom: rpmh: add support for batch RPMH request Lina Iyer
2018-04-25 23:41   ` Matthias Kaehlcke
2018-04-27 16:24     ` Lina Iyer
2018-04-19 22:16 ` [PATCH v6 10/10] drivers: qcom: rpmh-rsc: allow active requests from wake TCS Lina Iyer
2018-04-26  1:14   ` Matthias Kaehlcke

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