Re: [PATCH v5 07/13] wifi: ath12k: add support for fixed QMI firmware memory

[Krzysztof Kozlowski]

On 03/02/2025 10:44, Raj Kumar Bhagat wrote:
> On 1/30/2025 1:16 PM, Krzysztof Kozlowski wrote:
>> On 30/01/2025 05:35, Raj Kumar Bhagat wrote:
>>> @@ -2646,6 +2663,136 @@ static int ath12k_qmi_alloc_target_mem_chunk(struct ath12k_base *ab)
>>>  	return ret;
>>>  }
>>>  
>>> +static int ath12k_qmi_assign_target_mem_chunk(struct ath12k_base *ab)
>>> +{
>>> +	struct device_node *mem_node;
>>> +	struct resource res, m3_res;
>>> +	u32 bdf_start_addr;
>>> +	int i, idx, ret;
>>> +
>>> +	for (i = 0, idx = 0; i < ab->qmi.mem_seg_count; i++) {
>>> +		switch (ab->qmi.target_mem[i].type) {
>>> +		case HOST_DDR_REGION_TYPE:
>>> +			mem_node = ath12k_core_get_reserved_mem_by_name(ab, "q6-region");
>>
>>
>> Why cannot you use existing API for reserved memory -
>> of_reserved_mem_lookup()?
>>
> 
> The of_reserved_mem_lookup() requires reserved memory node to read the memory and
> return in the structure "struct reserved_mem".
> 
> The of_reserved_mem_lookup() would be used after we get the reserved memory node
> using the API - ath12k_core_get_reserved_mem_by_name(ab, "q6-region");
> 
> In next version we would use of_reserved_mem_lookup(), Something like below:
>     mem_node = ath12k_core_get_reserved_mem_by_name(ab, "q6-region");

Then why do you need ath12k_core_get_reserved_mem_by_name() in the first
place? Just use of_reserved_mem_lookup() directly. Why do you need to
parse phandle before of_reserved_mem_lookup()?


>     struct reserved_mem res = of_reserved_mem_lookup(mem_node)


Best regards,
Krzysztof