From: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
To: Bhupesh Sharma <bhupesh.sharma@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-crypto@vger.kernel.org
Cc: bhupesh.linux@gmail.com, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, robh+dt@kernel.org,
agross@kernel.org, herbert@gondor.apana.org.au,
davem@davemloft.net, Thara Gopinath <thara.gopinath@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>
Subject: Re: [PATCH v4 13/20] dma: qcom: bam_dma: Add support to initialize interconnect path
Date: Wed, 13 Oct 2021 22:15:39 +0300 [thread overview]
Message-ID: <f7d038b0-4e31-5f81-387b-91fc5328372e@linaro.org> (raw)
In-Reply-To: <20211013105541.68045-14-bhupesh.sharma@linaro.org>
Hi Bhupesh, Thara,
On 10/13/21 1:55 PM, Bhupesh Sharma wrote:
> From: Thara Gopinath <thara.gopinath@linaro.org>
>
> BAM dma engine associated with certain hardware blocks could require
> relevant interconnect pieces be initialized prior to the dma engine
> initialization. For e.g. crypto bam dma engine on sm8250. Such requirement
> is passed on to the bam dma driver from dt via the "interconnects"
> property. Add support in bam_dma driver to check whether the interconnect
> path is accessible/enabled prior to attempting driver intializations.
>
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Cc: Rob Herring <robh+dt@kernel.org>
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
> [Make header file inclusion alphabetical]
> Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
> ---
> drivers/dma/qcom/bam_dma.c | 16 +++++++++++++++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
> index c8a77b428b52..fc84ef42507d 100644
> --- a/drivers/dma/qcom/bam_dma.c
> +++ b/drivers/dma/qcom/bam_dma.c
> @@ -26,6 +26,7 @@
> #include <linux/kernel.h>
> #include <linux/io.h>
> #include <linux/init.h>
> +#include <linux/interconnect.h>
> #include <linux/slab.h>
> #include <linux/module.h>
> #include <linux/interrupt.h>
> @@ -392,6 +393,7 @@ struct bam_device {
> const struct reg_offset_data *layout;
>
> struct clk *bamclk;
> + struct icc_path *mem_path;
> int irq;
>
> /* dma start transaction tasklet */
> @@ -1284,9 +1286,18 @@ static int bam_dma_probe(struct platform_device *pdev)
> return ret;
> }
>
> + /* Ensure that interconnects are initialized */
> + bdev->mem_path = of_icc_get(bdev->dev, "memory");
I suppose devm_of_icc_get() usage could leave the error path and
bam_dma_remove() intact.
> +
> + if (IS_ERR(bdev->mem_path)) {
> + ret = PTR_ERR(bdev->mem_path);
> + dev_err(bdev->dev, "failed to acquire icc path %d\n", ret);
> + goto err_disable_clk;
> + }
> +
> ret = bam_init(bdev);
> if (ret)
> - goto err_disable_clk;
> + goto err_icc_path_put;
>
> tasklet_setup(&bdev->task, dma_tasklet);
>
> @@ -1371,6 +1382,8 @@ static int bam_dma_probe(struct platform_device *pdev)
> tasklet_kill(&bdev->channels[i].vc.task);
> err_tasklet_kill:
> tasklet_kill(&bdev->task);
> +err_icc_path_put:
> + icc_put(bdev->mem_path);
> err_disable_clk:
> clk_disable_unprepare(bdev->bamclk);
>
> @@ -1406,6 +1419,7 @@ static int bam_dma_remove(struct platform_device *pdev)
>
> tasklet_kill(&bdev->task);
>
> + icc_put(bdev->mem_path);
> clk_disable_unprepare(bdev->bamclk);
>
> return 0;
>
--
Best wishes,
Vladimir
next prev parent reply other threads:[~2021-10-13 19:16 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 10:55 [PATCH v4 00/20] Enable Qualcomm Crypto Engine on sm8250 Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 01/20] arm64/dts: qcom: Fix 'dma' & 'qcom,controlled-remotely' nodes in dts Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 02/20] arm64/dts: qcom: ipq6018: Remove unused 'qcom,config-pipe-trust-reg' property Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 03/20] arm64/dts: qcom: ipq6018: Remove unused 'iface_clk' property from dma-controller node Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 04/20] dt-bindings: qcom-bam: Convert binding to YAML Bhupesh Sharma
2021-10-13 12:56 ` Vladimir Zapolskiy
2021-10-13 17:13 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 05/20] dt-bindings: qcom-bam: Add 'interconnects' & 'interconnect-names' to optional properties Bhupesh Sharma
2021-10-13 13:03 ` Vladimir Zapolskiy
2021-10-13 17:14 ` Bhupesh Sharma
2021-10-13 18:39 ` Rob Herring
2021-10-14 7:03 ` Bhupesh Sharma
2021-10-24 13:55 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 06/20] dt-bindings: qcom-bam: Add 'iommus' " Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 07/20] dt-bindings: qcom-qce: Convert bindings to yaml Bhupesh Sharma
2021-10-13 13:05 ` Vladimir Zapolskiy
2021-10-13 17:15 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 08/20] dt-bindings: qcom-qce: Add 'interconnects' and move 'clocks' to optional properties Bhupesh Sharma
2021-10-26 19:40 ` Rob Herring
2021-10-13 10:55 ` [PATCH v4 09/20] dt-bindings: qcom-qce: Add 'iommus' " Bhupesh Sharma
2021-10-26 19:40 ` Rob Herring
2021-10-13 10:55 ` [PATCH v4 10/20] arm64/dts: qcom: sdm845: Use RPMH_CE_CLK macro directly Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 11/20] dt-bindings: crypto : Add new compatible strings for qcom-qce Bhupesh Sharma
2021-10-18 18:26 ` Rob Herring
2021-10-13 10:55 ` [PATCH v4 12/20] arm64/dts: qcom: Use new compatibles for crypto nodes Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 13/20] dma: qcom: bam_dma: Add support to initialize interconnect path Bhupesh Sharma
2021-10-13 19:15 ` Vladimir Zapolskiy [this message]
2021-10-24 13:53 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 14/20] crypto: qce: core: " Bhupesh Sharma
2021-10-13 19:19 ` Vladimir Zapolskiy
2021-10-24 13:53 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 15/20] crypto: qce: Add new compatibles for qce crypto driver Bhupesh Sharma
2021-10-13 19:22 ` Vladimir Zapolskiy
2021-10-20 14:07 ` Thara Gopinath
2021-10-24 13:52 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 16/20] crypto: qce: core: Make clocks optional Bhupesh Sharma
2021-10-13 19:23 ` Vladimir Zapolskiy
2021-10-24 13:34 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 17/20] crypto: qce: Print a failure msg in case probe() fails Bhupesh Sharma
2021-10-13 19:26 ` Vladimir Zapolskiy
2021-10-24 13:33 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 18/20] crypto: qce: Defer probing if BAM dma channel is not yet initialized Bhupesh Sharma
2021-10-13 20:49 ` Vladimir Zapolskiy
2021-10-14 7:40 ` Bhupesh Sharma
2021-10-14 8:42 ` Vladimir Zapolskiy
2021-10-20 14:10 ` Thara Gopinath
2021-10-24 14:05 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 19/20] crypto: qce: Add 'sm8250-qce' compatible string check Bhupesh Sharma
2021-10-20 14:11 ` Thara Gopinath
2021-10-13 10:55 ` [PATCH v4 20/20] arm64/dts: qcom: sm8250: Add dt entries to support crypto engine Bhupesh Sharma
2021-10-20 14:03 ` [PATCH v4 00/20] Enable Qualcomm Crypto Engine on sm8250 Thara Gopinath
2021-10-24 13:58 ` Bhupesh Sharma
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