On Wed, Jul 05, 2023 at 08:41:51PM +0900, Yoshihiro Shimoda wrote:
> Add "code" and "routing" into struct dw_pcie_ob_atu_cfg for sending
> MSG by iATU in the PCIe endpoint mode in near the future.
> PCIE_ATU_INHIBIT_PAYLOAD is set to issue TLP type of Msg instead of
> MsgD. So, this implementation supports the data-less messages only
> for now.
Looks good. 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.c | 9 +++++++--
> drivers/pci/controller/dwc/pcie-designware.h | 4 ++++
> 2 files changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
> index e4ac1def7363..a531dc50abea 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.c
> +++ b/drivers/pci/controller/dwc/pcie-designware.c
> @@ -498,7 +498,7 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci,
> dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_TARGET,
> upper_32_bits(atu->pci_addr));
>
> - val = atu->type | PCIE_ATU_FUNC_NUM(atu->func_no);
> + val = atu->type | atu->routing | PCIE_ATU_FUNC_NUM(atu->func_no);
> if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) &&
> dw_pcie_ver_is_ge(pci, 460A))
> val |= PCIE_ATU_INCREASE_REGION_SIZE;
> @@ -506,7 +506,12 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci,
> val = dw_pcie_enable_ecrc(val);
> dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL1, val);
>
> - dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE);
> + val = PCIE_ATU_ENABLE;
> + if (atu->type == PCIE_ATU_TYPE_MSG) {
> + /* The data-less messages only for now */
> + val |= PCIE_ATU_INHIBIT_PAYLOAD | atu->code;
> + }
> + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, val);
>
> /*
> * Make sure ATU enable takes effect before any subsequent config
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 85de0d8346fa..c626d21243b0 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -147,11 +147,13 @@
> #define PCIE_ATU_TYPE_IO 0x2
> #define PCIE_ATU_TYPE_CFG0 0x4
> #define PCIE_ATU_TYPE_CFG1 0x5
> +#define PCIE_ATU_TYPE_MSG 0x10
> #define PCIE_ATU_TD BIT(8)
> #define PCIE_ATU_FUNC_NUM(pf) ((pf) << 20)
> #define PCIE_ATU_REGION_CTRL2 0x004
> #define PCIE_ATU_ENABLE BIT(31)
> #define PCIE_ATU_BAR_MODE_ENABLE BIT(30)
> +#define PCIE_ATU_INHIBIT_PAYLOAD BIT(22)
> #define PCIE_ATU_FUNC_NUM_MATCH_EN BIT(19)
> #define PCIE_ATU_LOWER_BASE 0x008
> #define PCIE_ATU_UPPER_BASE 0x00C
> @@ -292,6 +294,8 @@ struct dw_pcie_ob_atu_cfg {
> int index;
> int type;
> u8 func_no;
> + u8 code;
> + u8 routing;
> u64 cpu_addr;
> u64 pci_addr;
> u64 size;
> --
> 2.25.1
>
