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

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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@xxxxxxxxx>

-Serge(y)

> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> ---
>  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
> 



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux