Add "code" and "routing" into struct dw_pcie_ob_atu_cfg for triggering
INTx IRQs 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.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
---
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 49b785509576..2d0f816fa0ab 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 296c5b1ddc91..8f22a7bc0523 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
@@ -302,6 +304,8 @@ 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
