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Subject: Re: [PATCH v4 03/10] PCI: Update xxx_pcie_ep_raise_irq() and
 pci_epc_raise_irq() signatures
To:     Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
        <bhelgaas@google.com>, <lorenzo.pieralisi@arm.com>,
        <Joao.Pinto@synopsys.com>, <jingoohan1@gmail.com>,
        <adouglas@cadence.com>, <jesper.nilsson@axis.com>
References: <cover.1529329262.git.gustavo.pimentel@synopsys.com>
 <5bfa0cf053878e0e859a8b97227ca03ea4d50e92.1529329262.git.gustavo.pimentel@synopsys.com>
CC:     <linux-pci@vger.kernel.org>, <linux-doc@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
From:   Kishon Vijay Abraham I <kishon@ti.com>
Message-ID: <355c0797-1e86-fc0e-ca61-b5eb00835d36@ti.com>
Date:   Wed, 20 Jun 2018 12:17:29 +0530
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Hi,

On Monday 18 June 2018 08:30 PM, Gustavo Pimentel wrote:
> Change {cdns, dra7xx, artpec6}_pcie_ep_raise_irq() and pci_epc_raise_irq()
> signature, namely the interrupt_num variable type from u8 to u16 to
> accommodate 2048 maximum MSI-X interrupts.
> 
> Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
> Acked-by: Alan Douglas <adouglas@cadence.com>

This patch should precede patch #2 and the following hunk from patch #2 should
be added here.

--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -191,7 +191,7 @@ enum dw_pcie_as_type {
 struct dw_pcie_ep_ops {
 	void	(*ep_init)(struct dw_pcie_ep *ep);
 	int	(*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
-			     enum pci_epc_irq_type type, u8 interrupt_num);
+			     enum pci_epc_irq_type type, u16 interrupt_num);
 };

Thanks
Kishon

> ---
> Change v1->v2:
>  - Nothing changed, just to follow the patch set version.
> Change v2->v3:
>  - Move into here the pci_epc_raise_irq() signature change from patch
> file #1.
>  - Move into here the {dra7xx, artpec6}_pcie_ep_raise_irq() signature
> changes from patch file #2.
> Change v3->v4:
>  - Rebased to Lorenzo's master branch v4.18-rc1.
> 
>  drivers/pci/controller/dwc/pci-dra7xx.c   | 2 +-
>  drivers/pci/controller/dwc/pcie-artpec6.c | 2 +-
>  drivers/pci/controller/pcie-cadence-ep.c  | 3 ++-
>  drivers/pci/endpoint/pci-epc-core.c       | 8 ++++----
>  include/linux/pci-epc.h                   | 6 +++---
>  5 files changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
> index 345aab5..ce9224a 100644
> --- a/drivers/pci/controller/dwc/pci-dra7xx.c
> +++ b/drivers/pci/controller/dwc/pci-dra7xx.c
> @@ -370,7 +370,7 @@ static void dra7xx_pcie_raise_msi_irq(struct dra7xx_pcie *dra7xx,
>  }
>  
>  static int dra7xx_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
> -				 enum pci_epc_irq_type type, u8 interrupt_num)
> +				 enum pci_epc_irq_type type, u16 interrupt_num)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
>  	struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
> diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
> index 321b56c..9a2474b 100644
> --- a/drivers/pci/controller/dwc/pcie-artpec6.c
> +++ b/drivers/pci/controller/dwc/pcie-artpec6.c
> @@ -428,7 +428,7 @@ static void artpec6_pcie_ep_init(struct dw_pcie_ep *ep)
>  }
>  
>  static int artpec6_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
> -				  enum pci_epc_irq_type type, u8 interrupt_num)
> +				  enum pci_epc_irq_type type, u16 interrupt_num)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
>  
> diff --git a/drivers/pci/controller/pcie-cadence-ep.c b/drivers/pci/controller/pcie-cadence-ep.c
> index e3fe412..208d11f 100644
> --- a/drivers/pci/controller/pcie-cadence-ep.c
> +++ b/drivers/pci/controller/pcie-cadence-ep.c
> @@ -363,7 +363,8 @@ static int cdns_pcie_ep_send_msi_irq(struct cdns_pcie_ep *ep, u8 fn,
>  }
>  
>  static int cdns_pcie_ep_raise_irq(struct pci_epc *epc, u8 fn,
> -				  enum pci_epc_irq_type type, u8 interrupt_num)
> +				  enum pci_epc_irq_type type,
> +				  u16 interrupt_num)
>  {
>  	struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
>  
> diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
> index 7d77bd0..c72e656 100644
> --- a/drivers/pci/endpoint/pci-epc-core.c
> +++ b/drivers/pci/endpoint/pci-epc-core.c
> @@ -131,13 +131,13 @@ EXPORT_SYMBOL_GPL(pci_epc_start);
>   * pci_epc_raise_irq() - interrupt the host system
>   * @epc: the EPC device which has to interrupt the host
>   * @func_no: the endpoint function number in the EPC device
> - * @type: specify the type of interrupt; legacy or MSI
> - * @interrupt_num: the MSI interrupt number
> + * @type: specify the type of interrupt; legacy, MSI or MSI-X
> + * @interrupt_num: the MSI or MSI-X interrupt number
>   *
> - * Invoke to raise an MSI or legacy interrupt
> + * Invoke to raise an legacy, MSI or MSI-X interrupt
>   */
>  int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
> -		      enum pci_epc_irq_type type, u8 interrupt_num)
> +		      enum pci_epc_irq_type type, u16 interrupt_num)
>  {
>  	int ret;
>  	unsigned long flags;
> diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
> index 89f079f..bb2395b 100644
> --- a/include/linux/pci-epc.h
> +++ b/include/linux/pci-epc.h
> @@ -35,7 +35,7 @@ enum pci_epc_irq_type {
>   *	     MSI-X capability register
>   * @get_msix: ops to get the number of MSI-X interrupts allocated by the RC
>   *	     from the MSI-X capability register
> - * @raise_irq: ops to raise a legacy or MSI interrupt
> + * @raise_irq: ops to raise a legacy, MSI or MSI-X interrupt
>   * @start: ops to start the PCI link
>   * @stop: ops to stop the PCI link
>   * @owner: the module owner containing the ops
> @@ -56,7 +56,7 @@ struct pci_epc_ops {
>  	int	(*set_msix)(struct pci_epc *epc, u8 func_no, u16 interrupts);
>  	int	(*get_msix)(struct pci_epc *epc, u8 func_no);
>  	int	(*raise_irq)(struct pci_epc *epc, u8 func_no,
> -			     enum pci_epc_irq_type type, u8 interrupt_num);
> +			     enum pci_epc_irq_type type, u16 interrupt_num);
>  	int	(*start)(struct pci_epc *epc);
>  	void	(*stop)(struct pci_epc *epc);
>  	struct module *owner;
> @@ -154,7 +154,7 @@ int pci_epc_get_msi(struct pci_epc *epc, u8 func_no);
>  int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts);
>  int pci_epc_get_msix(struct pci_epc *epc, u8 func_no);
>  int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
> -		      enum pci_epc_irq_type type, u8 interrupt_num);
> +		      enum pci_epc_irq_type type, u16 interrupt_num);
>  int pci_epc_start(struct pci_epc *epc);
>  void pci_epc_stop(struct pci_epc *epc);
>  struct pci_epc *pci_epc_get(const char *epc_name);
>