diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2024-03-27 10:13:34 +0100 |
|---|---|---|
| committer | Krzysztof Wilczyński <kwilczynski@kernel.org> | 2024-04-10 19:50:06 +0200 |
| commit | 570d7715eed8a29ac5bd96c7694f060a991e5a31 (patch) | |
| tree | df0aab3641df6f1af1eaddb7fd18fb050b35924b /drivers/pci/controller/dwc/pcie-designware-ep.c | |
| parent | PCI: dwc: ep: Rename dw_pcie_ep_exit() to dw_pcie_ep_deinit() (diff) | |
| download | linux-570d7715eed8a29ac5bd96c7694f060a991e5a31.tar.xz linux-570d7715eed8a29ac5bd96c7694f060a991e5a31.zip | |
PCI: dwc: ep: Introduce dw_pcie_ep_cleanup() API for drivers supporting PERST#
For DWC glue drivers supporting PERST# (currently Qcom and Tegra194), some
of the DWC resources like eDMA should be cleaned up during the PERST#
assert time.
So let's introduce a dw_pcie_ep_cleanup() API that could be called by these
drivers to cleanup the DWC specific resources. Currently, it just removes
eDMA.
Closes: https://lore.kernel.org/linux-pci/ZWYmX8Y%2F7Q9WMxES@x1-carbon
Link: https://lore.kernel.org/linux-pci/20240327-pci-dbi-rework-v12-5-082625472414@linaro.org
Reported-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
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, 17 insertions, 2 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index d87f7642d7f6..eeff7f1ff8f1 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -620,6 +620,22 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, } /** + * dw_pcie_ep_cleanup - Cleanup DWC EP resources after fundamental reset + * @ep: DWC EP device + * + * Cleans up the DWC EP specific resources like eDMA etc... after fundamental + * reset like PERST#. Note that this API is only applicable for drivers + * supporting PERST# or any other methods of fundamental reset. + */ +void dw_pcie_ep_cleanup(struct dw_pcie_ep *ep) +{ + struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + + dw_pcie_edma_remove(pci); +} +EXPORT_SYMBOL_GPL(dw_pcie_ep_cleanup); + +/** * dw_pcie_ep_deinit - Deinitialize the endpoint device * @ep: DWC EP device * @@ -628,10 +644,9 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, */ void dw_pcie_ep_deinit(struct dw_pcie_ep *ep) { - struct dw_pcie *pci = to_dw_pcie_from_ep(ep); struct pci_epc *epc = ep->epc; - dw_pcie_edma_remove(pci); + dw_pcie_ep_cleanup(ep); pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem, epc->mem->window.page_size); |