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| author | Xiaowei Bao <xiaowei.bao@nxp.com> | 2020-09-18 16:00:14 +0800 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-09-21 11:46:04 +0100 |
| commit | 2f7f7001d0e58f3f1c010c0ccdb049602c889b1d (patch) | |
| tree | 3710e02af3682dc036cdebf003775ae2b400c4f4 /drivers/pci/controller/dwc/pcie-designware-ep.c | |
| parent | 24ede430fa49d27ee4dd95ef6d234069fa034b9c (diff) | |
| download | linux-2f7f7001d0e58f3f1c010c0ccdb049602c889b1d.tar.gz linux-2f7f7001d0e58f3f1c010c0ccdb049602c889b1d.tar.bz2 linux-2f7f7001d0e58f3f1c010c0ccdb049602c889b1d.zip | |
PCI: designware-ep: Add the doorbell mode of MSI-X in EP mode
Add the doorbell mode of MSI-X in DWC EP driver.
Link: https://lore.kernel.org/r/20200918080024.13639-3-Zhiqiang.Hou@nxp.com
Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware-ep.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware-ep.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 500d4ca04947..5ae87e8ffb85 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -473,6 +473,25 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, return 0; } +int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no, + u16 interrupt_num) +{ + struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + struct dw_pcie_ep_func *ep_func; + u32 msg_data; + + ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); + if (!ep_func || !ep_func->msix_cap) + return -EINVAL; + + msg_data = (func_no << PCIE_MSIX_DOORBELL_PF_SHIFT) | + (interrupt_num - 1); + + dw_pcie_writel_dbi(pci, PCIE_MSIX_DOORBELL, msg_data); + + return 0; +} + int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, u16 interrupt_num) { |