[PATCH v23 12/14] crypto: qce - Map crypto memory for DMA

[Bartosz Golaszewski]

On Tue, 21 Jul 2026 20:20:05 +0200, Mukesh Savaliya
<mukesh.savaliya at oss.qualcomm.com> said:
>
>
> On 7/21/2026 7:03 PM, Bartosz Golaszewski wrote:
>> From: Bartosz Golaszewski <bartosz.golaszewski at linaro.org>
>
> [...]
>
>>   static int qce_crypto_probe(struct platform_device *pdev)
>>   {
>>   	struct device *dev = &pdev->dev;
>>   	struct qce_device *qce;
>> +	struct resource *res;
>>   	int ret;
>>
>>   	qce = devm_kzalloc(dev, sizeof(*qce), GFP_KERNEL);
>> @@ -204,7 +213,7 @@ static int qce_crypto_probe(struct platform_device *pdev)
>>   	qce->dev = dev;
>>   	platform_set_drvdata(pdev, qce);
>>
>> -	qce->base = devm_platform_ioremap_resource(pdev, 0);
>> +	qce->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
>>   	if (IS_ERR(qce->base))
> Would you like to add any debug/error log ?
>>   		return PTR_ERR(qce->base);
>>
>> @@ -254,6 +263,18 @@ static int qce_crypto_probe(struct platform_device *pdev)
>>   	qce->async_req_enqueue = qce_async_request_enqueue;
>>   	qce->async_req_done = qce_async_request_done;
>>
>> +	qce->dma_size = resource_size(res);
>> +	qce->base_dma = dma_map_resource(dev, res->start, qce->dma_size,
>> +					 DMA_BIDIRECTIONAL, 0);
>> +	qce->base_phys = res->start;
>> +	ret = dma_mapping_error(dev, qce->base_dma);
>> +	if (ret)
> Would you like to add any debug/error log ?

No, I don't think this is needed and at v23 this really is useless bikeshedding
and doesn't add anything to the discussion and only delays getting
this upstream.

Bartosz

>> +		return ret;
>> +
>> +	ret = devm_add_action_or_reset(qce->dev, qce_crypto_unmap_dma, qce);
>> +	if (ret)
> same here
>> +		return ret;
>> +
>>   	return devm_qce_register_algs(qce);
>>   }
>>
>
> [...]
>
>