diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2023-06-02 17:17:51 +0530 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2023-06-23 15:05:20 -0500 |
| commit | a1f6c3d7d3a2fdcb7bf77da17a17944c81ca13de (patch) | |
| tree | 5849a1b511721475b4b3691b9dfe1ba03a83be4f /drivers/pci/endpoint | |
| parent | a504c965588b781f864364e897917a2c7b48ea5b (diff) | |
PCI: endpoint: Add linkdown notifier support
Add support to notify the EPF device about the linkdown event from the EPC
device.
Link: https://lore.kernel.org/r/20230602114756.36586-5-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Diffstat (limited to 'drivers/pci/endpoint')
| -rw-r--r-- | drivers/pci/endpoint/pci-epc-core.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 0cf602c83d4a..e0570b52698d 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -707,6 +707,32 @@ void pci_epc_linkup(struct pci_epc *epc) EXPORT_SYMBOL_GPL(pci_epc_linkup); /** + * pci_epc_linkdown() - Notify the EPF device that EPC device has dropped the + * connection with the Root Complex. + * @epc: the EPC device which has dropped the link with the host + * + * Invoke to Notify the EPF device that the EPC device has dropped the + * connection with the Root Complex. + */ +void pci_epc_linkdown(struct pci_epc *epc) +{ + struct pci_epf *epf; + + if (!epc || IS_ERR(epc)) + return; + + mutex_lock(&epc->list_lock); + list_for_each_entry(epf, &epc->pci_epf, list) { + mutex_lock(&epf->lock); + if (epf->event_ops && epf->event_ops->link_down) + epf->event_ops->link_down(epf); + mutex_unlock(&epf->lock); + } + mutex_unlock(&epc->list_lock); +} +EXPORT_SYMBOL_GPL(pci_epc_linkdown); + +/** * pci_epc_init_notify() - Notify the EPF device that EPC device's core * initialization is completed. * @epc: the EPC device whose core initialization is completed |