diff mbox series

[v12,2/8] PCI: dwc: ep: Add Kernel-doc comments for APIs

Message ID 20240327-pci-dbi-rework-v12-2-082625472414@linaro.org (mailing list archive)
State Awaiting Upstream
Delegated to: Geert Uytterhoeven
Headers show
Series PCI: dwc: ep: Fix DBI access failure for drivers requiring refclk from host | expand

Commit Message

Manivannan Sadhasivam March 27, 2024, 9:13 a.m. UTC 
All of the APIs are missing the Kernel-doc comments. Hence, add them.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/controller/dwc/pcie-designware-ep.c | 77 +++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

Comments

Bjorn Helgaas April 12, 2024, 7:58 p.m. UTC | #1 
On Wed, Mar 27, 2024 at 02:43:31PM +0530, Manivannan Sadhasivam wrote:
> All of the APIs are missing the Kernel-doc comments. Hence, add them.

> + * dw_pcie_ep_reset_bar - Reset endpoint BAR

Apparently this resets @bar for every function of the device, so it's
not just a single BAR?

> + * 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.

s/errono/errno/ (another instance below)

Bjorn
Manivannan Sadhasivam April 15, 2024, 2 p.m. UTC | #2 
On Fri, Apr 12, 2024 at 02:58:36PM -0500, Bjorn Helgaas wrote:
> On Wed, Mar 27, 2024 at 02:43:31PM +0530, Manivannan Sadhasivam wrote:
> > All of the APIs are missing the Kernel-doc comments. Hence, add them.
> 
> > + * dw_pcie_ep_reset_bar - Reset endpoint BAR
> 
> Apparently this resets @bar for every function of the device, so it's
> not just a single BAR?
> 

Right. It should've been 'Reset endpoint BARs'. And the API name is also
misleading, but that is not the scope of this series.

> > + * 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.
> 
> s/errono/errno/ (another instance below)
> 

ah, thanks for spotting. Since this series is already merged, I hope Krzysztof
can ammend this.

- Mani
Bjorn Helgaas April 15, 2024, 2:34 p.m. UTC | #3 
On Mon, Apr 15, 2024 at 07:30:15PM +0530, Manivannan Sadhasivam wrote:
> On Fri, Apr 12, 2024 at 02:58:36PM -0500, Bjorn Helgaas wrote:
> > On Wed, Mar 27, 2024 at 02:43:31PM +0530, Manivannan Sadhasivam wrote:
> > > All of the APIs are missing the Kernel-doc comments. Hence, add them.
> > 
> > > + * dw_pcie_ep_reset_bar - Reset endpoint BAR
> > 
> > Apparently this resets @bar for every function of the device, so it's
> > not just a single BAR?
> 
> Right. It should've been 'Reset endpoint BARs'. And the API name is also
> misleading, but that is not the scope of this series.

Maybe just this for now:

s/Reset endpoint BAR/Reset @bar of every function/

> > > + * 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.
> > 
> > s/errono/errno/ (another instance below)
> 
> ah, thanks for spotting. Since this series is already merged, I hope
> Krzysztof can ammend this.

Sounds good, thanks!

Bjorn
diff mbox series

Patch

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;