summaryrefslogtreecommitdiff
path: root/drivers/pci/controller/dwc/pci-layerscape-ep.c
diff options
context:
space:
mode:
authorManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>2024-03-27 12:13:37 +0300
committerKrzysztof Wilczyński <kwilczynski@kernel.org>2024-04-10 20:52:42 +0300
commita01e7214bef904723d26d293eb17586078610379 (patch)
treea872bcbfadbb295e0be7c01fa8f26269c5d894c6 /drivers/pci/controller/dwc/pci-layerscape-ep.c
parentdf69e17ccc2f87bd6ce7a862dcdce16ae55a7fd7 (diff)
downloadlinux-a01e7214bef904723d26d293eb17586078610379.tar.xz
PCI: endpoint: Remove "core_init_notifier" flag
"core_init_notifier" flag is set by the glue drivers requiring refclk from the host to complete the DWC core initialization. Also, those drivers will send a notification to the EPF drivers once the initialization is fully completed using the pci_epc_init_notify() API. Only then, the EPF drivers will start functioning. For the rest of the drivers generating refclk locally, EPF drivers will start functioning post binding with them. EPF drivers rely on the 'core_init_notifier' flag to differentiate between the drivers. Unfortunately, this creates two different flows for the EPF drivers. So to avoid that, let's get rid of the "core_init_notifier" flag and follow a single initialization flow for the EPF drivers. This is done by calling the dw_pcie_ep_init_notify() from all glue drivers after the completion of dw_pcie_ep_init_registers() API. This will allow all the glue drivers to send the notification to the EPF drivers once the initialization is fully completed. Only difference here is that, the drivers requiring refclk from host will send the notification once refclk is received, while others will send it during probe time itself. But this also requires the EPC core driver to deliver the notification after EPF driver bind. Because, the glue driver can send the notification before the EPF drivers bind() and in those cases the EPF drivers will miss the event. To accommodate this, EPC core is now caching the state of the EPC initialization in 'init_complete' flag and pci-ep-cfs driver sends the notification to EPF drivers based on that after each EPF driver bind. Link: https://lore.kernel.org/linux-pci/20240327-pci-dbi-rework-v12-8-082625472414@linaro.org Tested-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/pci-layerscape-ep.c')
-rw-r--r--drivers/pci/controller/dwc/pci-layerscape-ep.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index 9eb2233e3d7f..7dde6d5fa4d8 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -286,6 +286,8 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
return ret;
}
+ dw_pcie_ep_init_notify(&pci->ep);
+
return ls_pcie_ep_interrupt_init(pcie, pdev);
}