diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2024-04-18 12:04:26 -0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-07-09 18:20:08 -0500 |
| commit | cd02e4b684fd3244bd55425e683e26a4003a2925 (patch) | |
| tree | 3786bb131c0c740052be858a5c29e8f6ff7a7a2a /drivers/pci/controller/dwc/pcie-designware.c | |
| parent | aa85ef61d841dc5506861f71c28c351e17a9f472 (diff) | |
PCI: dwc: Add outbound MSG TLPs support
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. This implementation supports the data-less messages only for now.
Link: https://lore.kernel.org/linux-pci/20240418-pme_msg-v8-3-a54265c39742@nxp.com
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index b5df76693ccd..26ecf0472f86 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -499,7 +499,7 @@ 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; @@ -507,7 +507,12 @@ 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 |