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Message-Id: <20240327-pci-dbi-rework-v12-2-082625472414@linaro.org>
Date: Wed, 27 Mar 2024 14:43:31 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Jingoo Han <jingoohan1@...il.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>, 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>,
Jesper Nilsson <jesper.nilsson@...s.com>,
Srikanth Thokala <srikanth.thokala@...el.com>,
Shawn Lin <shawn.lin@...k-chips.com>, Heiko Stuebner <heiko@...ech.de>,
Kishon Vijay Abraham I <kishon@...nel.org>
Cc: 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>, linux-arm-kernel@...s.com,
linux-rockchip@...ts.infradead.org,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Frank Li <Frank.Li@....com>
Subject: [PATCH v12 2/8] PCI: dwc: ep: Add Kernel-doc comments for APIs
All of the APIs are missing the Kernel-doc comments. Hence, add them.
Reviewed-by: Frank Li <Frank.Li@....com>
Reviewed-by: Niklas Cassel <cassel@...nel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
drivers/pci/controller/dwc/pcie-designware-ep.c | 77 +++++++++++++++++++++++++
1 file changed, 77 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index c43a1479de2c..dc63478f6910 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -15,6 +15,10 @@
#include <linux/pci-epc.h>
#include <linux/pci-epf.h>
+/**
+ * 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;
@@ -23,6 +27,10 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_linkup);
+/**
+ * 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;
@@ -31,6 +39,14 @@ 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)
{
@@ -61,6 +77,11 @@ 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;
@@ -440,6 +461,13 @@ 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);
@@ -451,6 +479,14 @@ 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)
{
@@ -500,6 +536,15 @@ 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 MSI-X 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)
{
@@ -519,6 +564,14 @@ 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 MSI-X 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)
{
@@ -566,6 +619,13 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
return 0;
}
+/**
+ * dw_pcie_ep_exit - Deinitialize the endpoint device
+ * @ep: DWC EP device
+ *
+ * Deinitialize the endpoint device. EPC device is not destroyed since that will
+ * be taken care by Devres.
+ */
void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@@ -601,6 +661,14 @@ static unsigned int dw_pcie_ep_find_ext_capability(struct dw_pcie *pci, int cap)
return 0;
}
+/**
+ * dw_pcie_ep_init_complete - Complete DWC EP initialization
+ * @ep: DWC EP device
+ *
+ * Complete the initialization of 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_complete(struct dw_pcie_ep *ep)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@@ -723,6 +791,15 @@ int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_init_complete);
+/**
+ * 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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