diff options
| author | Kishon Vijay Abraham I <kishon@ti.com> | 2019-01-14 16:44:59 +0530 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2019-02-14 16:08:10 +0000 |
| commit | 41cb8d189c9d4964df52a6f497cab7b301ae831b (patch) | |
| tree | 4cdd410aedc140e4d2d92366db67a68b9a273be5 /drivers/pci | |
| parent | 726dabfde6aa35a4f1508e235ae37edbbf9fbc65 (diff) | |
PCI: endpoint: Add new pci_epc_ops to get EPC features
Add a new pci_epc_ops ->get_features() to get the features
supported by the EPC. Since EPC can provide different features to
different functions, the ->get_features() ops takes _func_no_ as
an argument.
Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/endpoint/pci-epc-core.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 094dcc3203b8..5a099479d9ab 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -84,6 +84,36 @@ err: EXPORT_SYMBOL_GPL(pci_epc_get); /** + * pci_epc_get_features() - get the features supported by EPC + * @epc: the features supported by *this* EPC device will be returned + * @func_no: the features supported by the EPC device specific to the + * endpoint function with func_no will be returned + * + * Invoke to get the features provided by the EPC which may be + * specific to an endpoint function. Returns pci_epc_features on success + * and NULL for any failures. + */ +const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc, + u8 func_no) +{ + const struct pci_epc_features *epc_features; + unsigned long flags; + + if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) + return NULL; + + if (!epc->ops->get_features) + return NULL; + + spin_lock_irqsave(&epc->lock, flags); + epc_features = epc->ops->get_features(epc, func_no); + spin_unlock_irqrestore(&epc->lock, flags); + + return epc_features; +} +EXPORT_SYMBOL_GPL(pci_epc_get_features); + +/** * pci_epc_stop() - stop the PCI link * @epc: the link of the EPC device that has to be stopped * |