From 5be29ebe9f059f2afadd2a725e12aa25e900b6fb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Winiarski?= Date: Thu, 27 Nov 2025 10:39:32 +0100 Subject: [PATCH] drm/xe/pci: Introduce a helper to allow VF access to PF xe_device MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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: Michal Wajdeczko Link: https://patch.msgid.link/20251127093934.1462188-3-michal.winiarski@intel.com Signed-off-by: Michał Winiarski (cherry picked from commit 8b3cce3ad9c78ce3dae1c178f99352d50e12a3c0) Signed-off-by: Thomas Hellström --- drivers/gpu/drm/xe/xe_pci.c | 17 +++++++++++++++++ drivers/gpu/drm/xe/xe_pci.h | 3 +++ 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c index bbe6f8e65844..0e39a0255b99 100644 --- a/drivers/gpu/drm/xe/xe_pci.c +++ b/drivers/gpu/drm/xe/xe_pci.c @@ -1223,6 +1223,23 @@ 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); diff --git a/drivers/gpu/drm/xe/xe_pci.h b/drivers/gpu/drm/xe/xe_pci.h index 611c1209b14c..11bcc5fe2c5b 100644 --- a/drivers/gpu/drm/xe/xe_pci.h +++ b/drivers/gpu/drm/xe/xe_pci.h @@ -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