diff mbox series

[v9,01/10] PCI: dwc: ep: Remove deinit() callback from struct dw_pcie_ep_ops

Message ID 20240304-pci-dbi-rework-v9-1-29d433d99cda@linaro.org (mailing list archive)
State New, archived
Headers show
Series PCI: dwc: ep: Fix DBI access failure for drivers requiring refclk from host | expand

Commit Message

Manivannan Sadhasivam March 4, 2024, 9:22 a.m. UTC 
deinit() callback was solely introduced for the pcie-rcar-gen4 driver where
it is used to do platform specific resource deallocation. And this callback
is called right at the end of the dw_pcie_ep_exit() API. So it doesn't
matter whether it is called within or outside of dw_pcie_ep_exit() API.

So let's remove this callback and directly call rcar_gen4_pcie_ep_deinit()
in pcie-rcar-gen4 driver to do resource deallocation after the completion
of dw_pcie_ep_exit() API in rcar_gen4_remove_dw_pcie_ep().

This simplifies the DWC layer.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/controller/dwc/pcie-designware-ep.c |  9 +--------
 drivers/pci/controller/dwc/pcie-designware.h    |  1 -
 drivers/pci/controller/dwc/pcie-rcar-gen4.c     | 14 ++++++++------
 3 files changed, 9 insertions(+), 15 deletions(-)

Comments

Niklas Cassel March 7, 2024, 7:52 p.m. UTC | #1 
On Mon, Mar 04, 2024 at 02:52:13PM +0530, Manivannan Sadhasivam wrote:
> deinit() callback was solely introduced for the pcie-rcar-gen4 driver where
> it is used to do platform specific resource deallocation. And this callback
> is called right at the end of the dw_pcie_ep_exit() API. So it doesn't
> matter whether it is called within or outside of dw_pcie_ep_exit() API.
> 
> So let's remove this callback and directly call rcar_gen4_pcie_ep_deinit()
> in pcie-rcar-gen4 driver to do resource deallocation after the completion
> of dw_pcie_ep_exit() API in rcar_gen4_remove_dw_pcie_ep().
> 
> This simplifies the DWC layer.
> 
> Reviewed-by: Frank Li <Frank.Li@nxp.com>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---

Reviewed-by: Niklas Cassel <cassel@kernel.org>
Yoshihiro Shimoda March 8, 2024, 11:17 a.m. UTC | #2 
Hello Manivannan,

> From: Manivannan Sadhasivam, Sent: Monday, March 4, 2024 6:22 PM
> 
> deinit() callback was solely introduced for the pcie-rcar-gen4 driver where
> it is used to do platform specific resource deallocation. And this callback
> is called right at the end of the dw_pcie_ep_exit() API. So it doesn't
> matter whether it is called within or outside of dw_pcie_ep_exit() API.
> 
> So let's remove this callback and directly call rcar_gen4_pcie_ep_deinit()
> in pcie-rcar-gen4 driver to do resource deallocation after the completion
> of dw_pcie_ep_exit() API in rcar_gen4_remove_dw_pcie_ep().
> 
> This simplifies the DWC layer.
> 
> Reviewed-by: Frank Li <Frank.Li@nxp.com>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thank you for the patch!

Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

Best regards,
Yoshihiro Shimoda

> ---
>  drivers/pci/controller/dwc/pcie-designware-ep.c |  9 +--------
>  drivers/pci/controller/dwc/pcie-designware.h    |  1 -
>  drivers/pci/controller/dwc/pcie-rcar-gen4.c     | 14 ++++++++------
>  3 files changed, 9 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index 5befed2dc02b..d305f9b4cdfe 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -575,9 +575,6 @@ 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);
> 
> @@ -738,7 +735,7 @@ 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");
> -		goto err_ep_deinit;
> +		return ret;
>  	}
> 
>  	ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
> @@ -775,10 +772,6 @@ 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 26dae4837462..ab7431a37209 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -333,7 +333,6 @@ struct dw_pcie_rp {
>  struct dw_pcie_ep_ops {
>  	void	(*pre_init)(struct dw_pcie_ep *ep);
>  	void	(*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);
> diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
> index e9166619b1f9..ac97d594ea47 100644
> --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
> +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
> @@ -352,11 +352,8 @@ static void rcar_gen4_pcie_ep_init(struct dw_pcie_ep *ep)
>  		dw_pcie_ep_reset_bar(pci, bar);
>  }
> 
> -static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep)
> +static void rcar_gen4_pcie_ep_deinit(struct rcar_gen4_pcie *rcar)
>  {
> -	struct dw_pcie *dw = to_dw_pcie_from_ep(ep);
> -	struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw);
> -
>  	writel(0, rcar->base + PCIEDMAINTSTSEN);
>  	rcar_gen4_pcie_common_deinit(rcar);
>  }
> @@ -408,7 +405,6 @@ static unsigned int rcar_gen4_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep,
>  static const struct dw_pcie_ep_ops pcie_ep_ops = {
>  	.pre_init = rcar_gen4_pcie_ep_pre_init,
>  	.init = rcar_gen4_pcie_ep_init,
> -	.deinit = rcar_gen4_pcie_ep_deinit,
>  	.raise_irq = rcar_gen4_pcie_ep_raise_irq,
>  	.get_features = rcar_gen4_pcie_ep_get_features,
>  	.get_dbi_offset = rcar_gen4_pcie_ep_get_dbi_offset,
> @@ -418,18 +414,24 @@ static const struct dw_pcie_ep_ops pcie_ep_ops = {
>  static int rcar_gen4_add_dw_pcie_ep(struct rcar_gen4_pcie *rcar)
>  {
>  	struct dw_pcie_ep *ep = &rcar->dw.ep;
> +	int ret;
> 
>  	if (!IS_ENABLED(CONFIG_PCIE_RCAR_GEN4_EP))
>  		return -ENODEV;
> 
>  	ep->ops = &pcie_ep_ops;
> 
> -	return dw_pcie_ep_init(ep);
> +	ret = dw_pcie_ep_init(ep);
> +	if (ret)
> +		rcar_gen4_pcie_ep_deinit(rcar);
> +
> +	return ret;
>  }
> 
>  static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar)
>  {
>  	dw_pcie_ep_exit(&rcar->dw.ep);
> +	rcar_gen4_pcie_ep_deinit(rcar);
>  }
> 
>  /* Common */
> 
> --
> 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 5befed2dc02b..d305f9b4cdfe 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -575,9 +575,6 @@  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);
 
@@ -738,7 +735,7 @@  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");
-		goto err_ep_deinit;
+		return ret;
 	}
 
 	ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
@@ -775,10 +772,6 @@  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 26dae4837462..ab7431a37209 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -333,7 +333,6 @@  struct dw_pcie_rp {
 struct dw_pcie_ep_ops {
 	void	(*pre_init)(struct dw_pcie_ep *ep);
 	void	(*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);
diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
index e9166619b1f9..ac97d594ea47 100644
--- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
+++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
@@ -352,11 +352,8 @@  static void rcar_gen4_pcie_ep_init(struct dw_pcie_ep *ep)
 		dw_pcie_ep_reset_bar(pci, bar);
 }
 
-static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep)
+static void rcar_gen4_pcie_ep_deinit(struct rcar_gen4_pcie *rcar)
 {
-	struct dw_pcie *dw = to_dw_pcie_from_ep(ep);
-	struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw);
-
 	writel(0, rcar->base + PCIEDMAINTSTSEN);
 	rcar_gen4_pcie_common_deinit(rcar);
 }
@@ -408,7 +405,6 @@  static unsigned int rcar_gen4_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep,
 static const struct dw_pcie_ep_ops pcie_ep_ops = {
 	.pre_init = rcar_gen4_pcie_ep_pre_init,
 	.init = rcar_gen4_pcie_ep_init,
-	.deinit = rcar_gen4_pcie_ep_deinit,
 	.raise_irq = rcar_gen4_pcie_ep_raise_irq,
 	.get_features = rcar_gen4_pcie_ep_get_features,
 	.get_dbi_offset = rcar_gen4_pcie_ep_get_dbi_offset,
@@ -418,18 +414,24 @@  static const struct dw_pcie_ep_ops pcie_ep_ops = {
 static int rcar_gen4_add_dw_pcie_ep(struct rcar_gen4_pcie *rcar)
 {
 	struct dw_pcie_ep *ep = &rcar->dw.ep;
+	int ret;
 
 	if (!IS_ENABLED(CONFIG_PCIE_RCAR_GEN4_EP))
 		return -ENODEV;
 
 	ep->ops = &pcie_ep_ops;
 
-	return dw_pcie_ep_init(ep);
+	ret = dw_pcie_ep_init(ep);
+	if (ret)
+		rcar_gen4_pcie_ep_deinit(rcar);
+
+	return ret;
 }
 
 static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar)
 {
 	dw_pcie_ep_exit(&rcar->dw.ep);
+	rcar_gen4_pcie_ep_deinit(rcar);
 }
 
 /* Common */