diff mbox series

[v19,12/19] PCI: dwc: endpoint: Introduce .pre_init() and .deinit()

Message ID 20230823091153.2578417-13-yoshihiro.shimoda.uh@renesas.com (mailing list archive)
State Superseded
Delegated to: Krzysztof WilczyƄski
Headers show
Series PCI: rcar-gen4: Add R-Car Gen4 PCIe support | expand

Commit Message

Yoshihiro Shimoda Aug. 23, 2023, 9:11 a.m. UTC
Renesas R-Car Gen4 PCIe controllers require vendor-specific
initialization before .init(). To use dw->dbi and dw->num-lanes
in the initialization code, introduce .pre_init() into struct
dw_pcie_ep_ops. Also introduce .deinit() to disable the controller
by using vendor-specific de-initialization.

Note that the ep_init in the struct dw_pcie_ep_ops should be renamed
to init later.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/pci/controller/dwc/pcie-designware-ep.c | 12 +++++++++++-
 drivers/pci/controller/dwc/pcie-designware.h    |  2 ++
 2 files changed, 13 insertions(+), 1 deletion(-)

Comments

Serge Semin Aug. 23, 2023, 11:14 a.m. UTC | #1
On Wed, Aug 23, 2023 at 06:11:46PM +0900, Yoshihiro Shimoda wrote:
> Renesas R-Car Gen4 PCIe controllers require vendor-specific
> initialization before .init(). To use dw->dbi and dw->num-lanes
> in the initialization code, introduce .pre_init() into struct
> dw_pcie_ep_ops. Also introduce .deinit() to disable the controller
> by using vendor-specific de-initialization.
> 

> Note that the ep_init in the struct dw_pcie_ep_ops should be renamed
> to init later.

Note this message look very little related to the patch itself. If you
want to signify your agreement with Mani then just put that note below
the "---" line.

Anyway. The callbacks execution order looks correct now. Thanks.
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>

-Serge(y)

> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> ---
>  drivers/pci/controller/dwc/pcie-designware-ep.c | 12 +++++++++++-
>  drivers/pci/controller/dwc/pcie-designware.h    |  2 ++
>  2 files changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index 9a51a723b892..ea8063742fac 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -695,6 +695,9 @@ void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
>  			      epc->mem->window.page_size);
>  
>  	pci_epc_mem_exit(epc);
> +
> +	if (ep->ops->deinit)
> +		ep->ops->deinit(ep);
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_exit);
>  
> @@ -798,6 +801,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  	ep->phys_base = res->start;
>  	ep->addr_size = resource_size(res);
>  
> +	if (ep->ops->pre_init)
> +		ep->ops->pre_init(ep);
> +
>  	dw_pcie_version_detect(pci);
>  
>  	dw_pcie_iatu_detect(pci);
> @@ -852,7 +858,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  			       ep->page_size);
>  	if (ret < 0) {
>  		dev_err(dev, "Failed to initialize address space\n");
> -		return ret;
> +		goto err_ep_deinit;
>  	}
>  
>  	ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
> @@ -898,6 +904,10 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  err_exit_epc_mem:
>  	pci_epc_mem_exit(epc);
>  
> +err_ep_deinit:
> +	if (ep->ops->deinit)
> +		ep->ops->deinit(ep);
> +
>  	return ret;
>  }
>  EXPORT_SYMBOL_GPL(dw_pcie_ep_init);
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 89999c483c37..77a9c3e70120 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -332,7 +332,9 @@ struct dw_pcie_rp {
>  };
>  
>  struct dw_pcie_ep_ops {
> +	void	(*pre_init)(struct dw_pcie_ep *ep);
>  	void	(*ep_init)(struct dw_pcie_ep *ep);
> +	void	(*deinit)(struct dw_pcie_ep *ep);
>  	int	(*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
>  			     unsigned int type, u16 interrupt_num);
>  	const struct pci_epc_features* (*get_features)(struct dw_pcie_ep *ep);
> -- 
> 2.25.1
>
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 9a51a723b892..ea8063742fac 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -695,6 +695,9 @@  void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
 			      epc->mem->window.page_size);
 
 	pci_epc_mem_exit(epc);
+
+	if (ep->ops->deinit)
+		ep->ops->deinit(ep);
 }
 EXPORT_SYMBOL_GPL(dw_pcie_ep_exit);
 
@@ -798,6 +801,9 @@  int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 	ep->phys_base = res->start;
 	ep->addr_size = resource_size(res);
 
+	if (ep->ops->pre_init)
+		ep->ops->pre_init(ep);
+
 	dw_pcie_version_detect(pci);
 
 	dw_pcie_iatu_detect(pci);
@@ -852,7 +858,7 @@  int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 			       ep->page_size);
 	if (ret < 0) {
 		dev_err(dev, "Failed to initialize address space\n");
-		return ret;
+		goto err_ep_deinit;
 	}
 
 	ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
@@ -898,6 +904,10 @@  int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 err_exit_epc_mem:
 	pci_epc_mem_exit(epc);
 
+err_ep_deinit:
+	if (ep->ops->deinit)
+		ep->ops->deinit(ep);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(dw_pcie_ep_init);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 89999c483c37..77a9c3e70120 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -332,7 +332,9 @@  struct dw_pcie_rp {
 };
 
 struct dw_pcie_ep_ops {
+	void	(*pre_init)(struct dw_pcie_ep *ep);
 	void	(*ep_init)(struct dw_pcie_ep *ep);
+	void	(*deinit)(struct dw_pcie_ep *ep);
 	int	(*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
 			     unsigned int type, u16 interrupt_num);
 	const struct pci_epc_features* (*get_features)(struct dw_pcie_ep *ep);