Re: [v3] PCI: cadence: Fix sending message with data or without data

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

On Fri, Feb 07, 2025 at 06:39:23PM +0800, Hans Zhang wrote:
> View from cdns document cdn_pcie_gen4_hpa_axi_ips_ug_v1.04.pdf.
> In section 9.1.7.1 AXI Subordinate to PCIe Address Translation
> Registers below:
> 
> axi_s_awaddr bits 16 is 1 for MSG with data and 0 for MSG without data.
> 
> Signed-off-by: hans.zhang <18255117159@163.com>
> ---
> Changes since v1-v2:
> - Change email number and Signed-off-by
> ---
>  drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 +--
>  drivers/pci/controller/cadence/pcie-cadence.h    | 2 +-
>  2 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> index e0cc4560dfde..0bf4cde34f51 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> @@ -352,8 +352,7 @@ static void cdns_pcie_ep_assert_intx(struct cdns_pcie_ep *ep, u8 fn, u8 intx,
>  	spin_unlock_irqrestore(&ep->lock, flags);
>  
>  	offset = CDNS_PCIE_NORMAL_MSG_ROUTING(MSG_ROUTING_LOCAL) |
> -		 CDNS_PCIE_NORMAL_MSG_CODE(msg_code) |
> -		 CDNS_PCIE_MSG_NO_DATA;
> +		 CDNS_PCIE_NORMAL_MSG_CODE(msg_code);
>  	writel(0, ep->irq_cpu_addr + offset);
>  }
>  
> diff --git a/drivers/pci/controller/cadence/pcie-cadence.h b/drivers/pci/controller/cadence/pcie-cadence.h
> index f5eeff834ec1..39ee9945c903 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence.h
> +++ b/drivers/pci/controller/cadence/pcie-cadence.h
> @@ -246,7 +246,7 @@ struct cdns_pcie_rp_ib_bar {
>  #define CDNS_PCIE_NORMAL_MSG_CODE_MASK		GENMASK(15, 8)
>  #define CDNS_PCIE_NORMAL_MSG_CODE(code) \
>  	(((code) << 8) & CDNS_PCIE_NORMAL_MSG_CODE_MASK)
> -#define CDNS_PCIE_MSG_NO_DATA			BIT(16)
> +#define CDNS_PCIE_MSG_DATA			BIT(16)

Oops! So how did you spot the issue? Did INTx triggering ever worked? RC should
have reported it as malformed TLP isn't it?

- Mani

-- 
மணிவண்ணன் சதாசிவம்