linux-kernel - Re: [PATCH v3 2/4] PCI: host-generic: Export gen_pci

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Message-ID: <70cfe4b4-93dc-4e9a-b064-9ce149dcca3c@quicinc.com>
Date: Fri, 15 Nov 2024 10:16:13 -0800
From: Mayank Rana <quic_mrana@...cinc.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
CC: <jingoohan1@...il.com>, <will@...nel.org>, <lpieralisi@...nel.org>,
        <kw@...ux.com>, <robh@...nel.org>, <bhelgaas@...gle.com>,
        <krzk@...nel.org>, <linux-pci@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_krichai@...cinc.com>
Subject: Re: [PATCH v3 2/4] PCI: host-generic: Export gen_pci_init() API to
 allow ECAM creation



On 11/15/2024 1:17 AM, Manivannan Sadhasivam wrote:
> On Wed, Nov 06, 2024 at 02:13:39PM -0800, Mayank Rana wrote:
>> Export gen_pci_init() API to create ECAM and initialized ECAM OPs
>> from PCIe driver which don't have way to populate driver_data as
>> just ECAM ops.
>>
>> Signed-off-by: Mayank Rana <quic_mrana@...cinc.com>
>> ---
>>   drivers/pci/controller/pci-host-common.c | 3 ++-
>>   include/linux/pci-ecam.h                 | 2 ++
>>   2 files changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c
>> index cf5f59a745b3..b9460a4c5b7e 100644
>> --- a/drivers/pci/controller/pci-host-common.c
>> +++ b/drivers/pci/controller/pci-host-common.c
>> @@ -20,7 +20,7 @@ static void gen_pci_unmap_cfg(void *ptr)
>>   	pci_ecam_free((struct pci_config_window *)ptr);
>>   }
>>   
>> -static struct pci_config_window *gen_pci_init(struct device *dev,
>> +struct pci_config_window *gen_pci_init(struct device *dev,
> 
> Please rename the API to something like 'pci_host_common_init()'.
> 'gen_pci_init()' is fine within the driver, but doesn't look good when exported
> outside.
ACK

> - Mani
> 
>>   		struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops)
>>   {
>>   	int err;
>> @@ -48,6 +48,7 @@ static struct pci_config_window *gen_pci_init(struct device *dev,
>>   
>>   	return cfg;
>>   }
>> +EXPORT_SYMBOL_GPL(gen_pci_init);
>>   
>>   int pci_host_common_probe(struct platform_device *pdev)
>>   {
>> diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h
>> index 3a4860bd2758..386c08349169 100644
>> --- a/include/linux/pci-ecam.h
>> +++ b/include/linux/pci-ecam.h
>> @@ -94,5 +94,7 @@ extern const struct pci_ecam_ops loongson_pci_ecam_ops; /* Loongson PCIe */
>>   /* for DT-based PCI controllers that support ECAM */
>>   int pci_host_common_probe(struct platform_device *pdev);
>>   void pci_host_common_remove(struct platform_device *pdev);
>> +struct pci_config_window *gen_pci_init(struct device *dev,
>> +		struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops);
>>   #endif
>>   #endif
>> -- 
>> 2.25.1
>>
>