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

[Mukesh Savaliya]

On 7/22/2026 2:47 PM, Bartosz Golaszewski wrote:
> 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.
> 
Okay, got it. Thanks !

> 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);
>>>    }
>>>
>>
>> [...]
>>
>>