Date: Mon, 26 Feb 2024 12:21:59 -0500
From: Frank Li <Frank.li@....com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Jingoo Han <jingoohan1@...il.com>,
	Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Marek Vasut <marek.vasut+renesas@...il.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Vidya Sagar <vidyas@...dia.com>,
	Vignesh Raghavendra <vigneshr@...com>,
	Richard Zhu <hongxing.zhu@....com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	NXP Linux Team <linux-imx@....com>,
	Minghuan Lian <minghuan.Lian@....com>,
	Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
	Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
	Niklas Cassel <cassel@...nel.org>
Subject: Re: [PATCH v8 10/10] PCI: dwc: ep: Add Kernel-doc comments for APIs

On Sat, Feb 24, 2024 at 12:24:16PM +0530, Manivannan Sadhasivam wrote:
> All of the APIs are missing the Kernel-doc comments. Hence, add them.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Reviewed-by: Frank Li <Frank.Li@....com>

> ---
>  drivers/pci/controller/dwc/pcie-designware-ep.c | 92 +++++++++++++++++++++++++
>  1 file changed, 92 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index fed4c2936c78..cdcb33a279db 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -14,6 +14,11 @@
>  #include <linux/pci-epc.h>
>  #include <linux/pci-epf.h>
>  
> +/**
> + * dw_pcie_ep_init_notify - Notify EPF drivers about EPC initialization
> + *			    complete
> + * @ep: DWC EP device
> + */
>  void dw_pcie_ep_init_notify(struct dw_pcie_ep *ep)
>  {
>  	struct pci_epc *epc = ep->epc;
> @@ -22,6 +27,14 @@ void dw_pcie_ep_init_notify(struct dw_pcie_ep *ep)
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_init_notify);
>  
> +/**
> + * dw_pcie_ep_get_func_from_ep - Get the struct dw_pcie_ep_func corresponding to
> + *				 the endpoint function
> + * @ep: DWC EP device
> + * @func_no: Function number of the endpoint device
> + *
> + * Return: struct dw_pcie_ep_func if success, NULL otherwise.
> + */
>  struct dw_pcie_ep_func *
>  dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no)
>  {
> @@ -52,6 +65,11 @@ static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, u8 func_no,
>  	dw_pcie_dbi_ro_wr_dis(pci);
>  }
>  
> +/**
> + * dw_pcie_ep_reset_bar - Reset endpoint BAR
> + * @pci: DWC PCI device
> + * @bar: BAR number of the endpoint
> + */
>  void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
>  {
>  	u8 func_no, funcs;
> @@ -431,6 +449,13 @@ static const struct pci_epc_ops epc_ops = {
>  	.get_features		= dw_pcie_ep_get_features,
>  };
>  
> +/**
> + * dw_pcie_ep_raise_intx_irq - Raise INTx IRQ to the host
> + * @ep: DWC EP device
> + * @func_no: Function number of the endpoint
> + *
> + * Return: 0 if success, errono otherwise.
> + */
>  int dw_pcie_ep_raise_intx_irq(struct dw_pcie_ep *ep, u8 func_no)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> @@ -442,6 +467,14 @@ int dw_pcie_ep_raise_intx_irq(struct dw_pcie_ep *ep, u8 func_no)
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_raise_intx_irq);
>  
> +/**
> + * dw_pcie_ep_raise_msi_irq - Raise MSI IRQ to the host
> + * @ep: DWC EP device
> + * @func_no: Function number of the endpoint
> + * @interrupt_num: Interrupt number to be raised
> + *
> + * Return: 0 if success, errono otherwise.
> + */
>  int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
>  			     u8 interrupt_num)
>  {
> @@ -490,6 +523,15 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_raise_msi_irq);
>  
> +/**
> + * dw_pcie_ep_raise_msix_irq_doorbell - Raise MSIX to the host using Doorbell
> + *					method
> + * @ep: DWC EP device
> + * @func_no: Function number of the endpoint device
> + * @interrupt_num: Interrupt number to be raised
> + *
> + * Return: 0 if success, errno otherwise.
> + */
>  int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no,
>  				       u16 interrupt_num)
>  {
> @@ -509,6 +551,14 @@ int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no,
>  	return 0;
>  }
>  
> +/**
> + * dw_pcie_ep_raise_msix_irq - Raise MSIX to the host
> + * @ep: DWC EP device
> + * @func_no: Function number of the endpoint device
> + * @interrupt_num: Interrupt number to be raised
> + *
> + * Return: 0 if success, errno otherwise.
> + */
>  int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
>  			      u16 interrupt_num)
>  {
> @@ -556,6 +606,12 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
>  	return 0;
>  }
>  
> +/**
> + * dw_pcie_ep_cleanup - Cleanup DWC EP resources
> + * @ep: DWC EP device
> + *
> + * Cleans up the DWC EP specific resources like eDMA etc...
> + */
>  void dw_pcie_ep_cleanup(struct dw_pcie_ep *ep)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> @@ -564,6 +620,13 @@ void dw_pcie_ep_cleanup(struct dw_pcie_ep *ep)
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_cleanup);
>  
> +/**
> + * dw_pcie_ep_deinit - Deinitialize the endpoint device
> + * @ep: DWC EP device
> + *
> + * Deinitialize the endpoint device. EPC device is not destroyed since that will
> + * taken care by Devres.
> + */
>  void dw_pcie_ep_deinit(struct dw_pcie_ep *ep)
>  {
>  	struct pci_epc *epc = ep->epc;
> @@ -635,6 +698,14 @@ static void dw_pcie_ep_init_non_sticky_registers(struct dw_pcie *pci)
>  	dw_pcie_dbi_ro_wr_dis(pci);
>  }
>  
> +/**
> + * dw_pcie_ep_init_registers - Initialize DWC EP specific registers
> + * @ep: DWC EP device
> + *
> + * Initialize the registers (CSRs) specific to DWC EP. This API should be called
> + * only when the endpoint receives an active refclk (either from host or
> + * generated locally).
> + */
>  int dw_pcie_ep_init_registers(struct dw_pcie_ep *ep)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> @@ -718,6 +789,10 @@ int dw_pcie_ep_init_registers(struct dw_pcie_ep *ep)
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_init_registers);
>  
> +/**
> + * dw_pcie_ep_linkup - Notify EPF drivers about link up event
> + * @ep: DWC EP device
> + */
>  void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
>  {
>  	struct pci_epc *epc = ep->epc;
> @@ -726,6 +801,14 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_linkup);
>  
> +/**
> + * dw_pcie_ep_linkdown - Notify EPF drivers about link down event
> + * @ep: DWC EP device
> + *
> + * Non-sticky registers are also initialized before sending the notification to
> + * the EPF drivers. This is needed since the registers need to be initialized
> + * before the link comes back again.
> + */
>  void dw_pcie_ep_linkdown(struct dw_pcie_ep *ep)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> @@ -743,6 +826,15 @@ void dw_pcie_ep_linkdown(struct dw_pcie_ep *ep)
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_linkdown);
>  
> +/**
> + * dw_pcie_ep_init - Initialize the endpoint device
> + * @ep: DWC EP device
> + *
> + * Initialize the endpoint device. Allocate resources and create the EPC
> + * device with the endpoint framework.
> + *
> + * Return: 0 if success, errno otherwise.
> + */
>  int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  {
>  	int ret;
> 
> -- 
> 2.25.1
> 

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