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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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6
include/linux/pci-epf.h
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@@ -55,13 +55,10 @@ struct pci_epf_header {
* @bind: ops to perform when a EPC device has been bound to EPF device
* @unbind: ops to perform when a binding has been lost between a EPC device
* and EPF device
* @linkup: ops to perform when the EPC device has established a connection with
* a host system
*/
struct pci_epf_ops {
int (*bind)(struct pci_epf *epf);
void (*unbind)(struct pci_epf *epf);
void (*linkup)(struct pci_epf *epf);
};
/**
@@ -112,6 +109,7 @@ struct pci_epf_bar {
* @epc: the EPC device to which this EPF device is bound
* @driver: the EPF driver to which this EPF device is bound
* @list: to add pci_epf as a list of PCI endpoint functions to pci_epc
* @nb: notifier block to notify EPF of any EPC events (like linkup)
*/
struct pci_epf {
struct device dev;
@@ -125,6 +123,7 @@ struct pci_epf {
struct pci_epc *epc;
struct pci_epf_driver *driver;
struct list_head list;
struct notifier_block nb;
};
#define to_pci_epf(epf_dev) container_of((epf_dev), struct pci_epf, dev)
@@ -154,5 +153,4 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar);
int pci_epf_bind(struct pci_epf *epf);
void pci_epf_unbind(struct pci_epf *epf);
void pci_epf_linkup(struct pci_epf *epf);
#endif /* __LINUX_PCI_EPF_H */