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PCI/portdrv: Add generic pcie_port_find_service() 

Add generic pcie_port_find_service() routine.

Signed-off-by: Oza Pawandeep <poza@codeaurora.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
This commit is contained in:
Oza Pawandeep 2018-05-17 16:44:16 -05:00 committed by Bjorn Helgaas
parent 2e28bc84cf
commit f252d0621a
4 changed files with 49 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/pci/pcie/aer/aerdrv_core.c
View File

@ -228,32 +228,6 @@ static bool find_source_device(struct pci_dev *parent,
return true;
}
static int find_aer_service_iter(struct device *device, void *data)
{
struct pcie_port_service_driver *service_driver, **drv;
drv = (struct pcie_port_service_driver **) data;
if (device->bus == &pcie_port_bus_type && device->driver) {
service_driver = to_service_driver(device->driver);
if (service_driver->service == PCIE_PORT_SERVICE_AER) {
*drv = service_driver;
return 1;
}
}
return 0;
}
struct pcie_port_service_driver *find_aer_service(struct pci_dev *dev)
{
struct pcie_port_service_driver *drv = NULL;
device_for_each_child(&dev->dev, &drv, find_aer_service_iter);
return drv;
}
/**
* handle_error_source - handle logging error into an event log
* @aerdev: pointer to pcie_device data structure of the root port

4
drivers/pci/pcie/err.c
View File

@ -194,10 +194,8 @@ static pci_ers_result_t reset_link(struct pci_dev *dev)
udev = dev->bus->self;
}
#if IS_ENABLED(CONFIG_PCIEAER)
/* Use the aer driver of the component firstly */
driver = find_aer_service(udev);
#endif
driver = pcie_port_find_service(udev, PCIE_PORT_SERVICE_AER);
if (driver && driver->reset_link) {
status = driver->reset_link(udev);

3
drivers/pci/pcie/portdrv.h
View File

@ -112,5 +112,6 @@ static inline bool pcie_pme_no_msi(void) { return false; }
static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {}
#endif /* !CONFIG_PCIE_PME */
struct pcie_port_service_driver *find_aer_service(struct pci_dev *dev);
struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
u32 service);
#endif /* _PORTDRV_H_ */

46
drivers/pci/pcie/portdrv_core.c
View File

@ -19,6 +19,11 @@
#include "../pci.h"
#include "portdrv.h"
struct portdrv_service_data {
struct pcie_port_service_driver *drv;
u32 service;
};
/**
* release_pcie_device - free PCI Express port service device structure
* @dev: Port service device to release
@ -398,6 +403,47 @@ static int remove_iter(struct device *dev, void *data)
return 0;
}
static int find_service_iter(struct device *device, void *data)
{
struct pcie_port_service_driver *service_driver;
struct portdrv_service_data *pdrvs;
u32 service;
pdrvs = (struct portdrv_service_data *) data;
service = pdrvs->service;
if (device->bus == &pcie_port_bus_type && device->driver) {
service_driver = to_service_driver(device->driver);
if (service_driver->service == service) {
pdrvs->drv = service_driver;
return 1;
}
}
return 0;
}
/**
* pcie_port_find_service - find the service driver
* @dev: PCI Express port the service is associated with
* @service: Service to find
*
* Find PCI Express port service driver associated with given service
*/
struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
u32 service)
{
struct pcie_port_service_driver *drv;
struct portdrv_service_data pdrvs;
pdrvs.drv = NULL;
pdrvs.service = service;
device_for_each_child(&dev->dev, &pdrvs, find_service_iter);
drv = pdrvs.drv;
return drv;
}
/**
* pcie_port_device_remove - unregister PCI Express port service devices
* @dev: PCI Express port the service devices to unregister are associated with