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PCI: endpoint: Use notification chain mechanism to notify EPC events to EPF

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Use atomic_notifier_call_chain() to notify EPC events like linkup to EPF
driver instead of using linkup ops in EPF driver. This is in preparation
for adding proper locking mechanism to EPF ops. This will also enable to
add more events (in addition to linkup) in the future.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Vidya Sagar <vidyas@nvidia.com>
This commit is contained in:
Kishon Vijay Abraham I
2020-02-24 15:23:34 +05:30
committed by Lorenzo Pieralisi
parent bb6d3fb354
commit 5779dd0a7d
5 changed files with 23 additions and 35 deletions
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8
include/linux/pci-epc.h
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@@ -89,6 +89,7 @@ struct pci_epc_mem {
* @max_functions: max number of functions that can be configured in this EPC
* @group: configfs group representing the PCI EPC device
* @lock: spinlock to protect pci_epc ops
* @notifier: used to notify EPF of any EPC events (like linkup)
*/
struct pci_epc {
struct device dev;
@@ -99,6 +100,7 @@ struct pci_epc {
struct config_group *group;
/* spinlock to protect against concurrent access of EP controller */
spinlock_t lock;
struct atomic_notifier_head notifier;
};
/**
@@ -141,6 +143,12 @@ static inline void *epc_get_drvdata(struct pci_epc *epc)
return dev_get_drvdata(&epc->dev);
}
static inline int
pci_epc_register_notifier(struct pci_epc *epc, struct notifier_block *nb)
{
return atomic_notifier_chain_register(&epc->notifier, nb);
}
struct pci_epc *
__devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
struct module *owner);