Commit 8b3cce3a authored by Michał Winiarski's avatar Michał Winiarski
Browse files

drm/xe/pci: Introduce a helper to allow VF access to PF xe_device 



In certain scenarios (such as VF migration), VF driver needs to interact
with PF driver.
Add a helper to allow VF driver access to PF xe_device.

Reviewed-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251127093934.1462188-3-michal.winiarski@intel.com


Signed-off-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
parent 01c724aa

drivers/gpu/drm/xe/xe_pci.c

+17 −0
Original line number Diff line number Diff line
@@ -1239,6 +1239,23 @@ static struct pci_driver xe_pci_driver = { 
#endif

};



/**

 * xe_pci_to_pf_device() - Get PF &xe_device.

 * @pdev: the VF &pci_dev device

 *

 * Return: pointer to PF &xe_device, NULL otherwise.

 */

struct xe_device *xe_pci_to_pf_device(struct pci_dev *pdev)

{

	struct drm_device *drm;



	drm = pci_iov_get_pf_drvdata(pdev, &xe_pci_driver);

	if (IS_ERR(drm))

		return NULL;



	return to_xe_device(drm);

}



int xe_register_pci_driver(void)

{

	return pci_register_driver(&xe_pci_driver);

drivers/gpu/drm/xe/xe_pci.h

+3 −0
Original line number Diff line number Diff line
@@ -6,7 +6,10 @@ 
#ifndef _XE_PCI_H_

#define _XE_PCI_H_



struct pci_dev;



int xe_register_pci_driver(void);

void xe_unregister_pci_driver(void);

struct xe_device *xe_pci_to_pf_device(struct pci_dev *pdev);



#endif