Commit c97cdf76 authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/pf: Add top level functions to control VFs 



We already have control functions that we use to control the VF
state on the per-GT basis, but that is low level detail from the
user point of view, who rather expects VF-level functions.

For now add simple functions that just iterate over all GTs and
call per-GT control function. We will soon allow to use some of
them from the user facing interfaces like debugfs.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
Link: https://lore.kernel.org/r/20250930233525.201263-2-michal.wajdeczko@intel.com
parent 846a81ab

drivers/gpu/drm/xe/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -174,6 +174,7 @@ xe-$(CONFIG_PCI_IOV) += \ 
	xe_lmtt_ml.o \

	xe_pci_sriov.o \

	xe_sriov_pf.o \

	xe_sriov_pf_control.o \

	xe_sriov_pf_debugfs.o \

	xe_sriov_pf_service.o \

	xe_tile_sriov_pf_debugfs.o

drivers/gpu/drm/xe/xe_pci_sriov.c

+3 −5
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include "xe_pm.h"

#include "xe_sriov.h"

#include "xe_sriov_pf.h"

#include "xe_sriov_pf_control.h"

#include "xe_sriov_pf_helpers.h"

#include "xe_sriov_printk.h"
@@ -60,13 +61,10 @@ static void pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs) 


static void pf_reset_vfs(struct xe_device *xe, unsigned int num_vfs)

{

	struct xe_gt *gt;

	unsigned int id;

	unsigned int n;



	for_each_gt(gt, xe, id)

	for (n = 1; n <= num_vfs; n++)

			xe_gt_sriov_pf_control_trigger_flr(gt, n);

		xe_sriov_pf_control_reset_vf(xe, n);

}



static struct pci_dev *xe_pci_pf_get_vf_dev(struct xe_device *xe, unsigned int vf_id)

drivers/gpu/drm/xe/xe_sriov_pf_control.c

0 → 100644
+104 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: MIT

/*

 * Copyright © 2025 Intel Corporation

 */



#include "xe_device.h"

#include "xe_gt_sriov_pf_control.h"

#include "xe_sriov_pf_control.h"



/**

 * xe_sriov_pf_control_pause_vf() - Pause a VF on all GTs.

 * @xe: the &xe_device

 * @vfid: the VF identifier (can't be 0 == PFID)

 *

 * This function is for PF only.

 *

 * Return: 0 on success or a negative error code on failure.

 */

int xe_sriov_pf_control_pause_vf(struct xe_device *xe, unsigned int vfid)

{

	struct xe_gt *gt;

	unsigned int id;

	int result = 0;

	int err;



	for_each_gt(gt, xe, id) {

		err = xe_gt_sriov_pf_control_pause_vf(gt, vfid);

		result = result ? -EUCLEAN : err;

	}



	return result;

}



/**

 * xe_sriov_pf_control_resume_vf() - Resume a VF on all GTs.

 * @xe: the &xe_device

 * @vfid: the VF identifier

 *

 * This function is for PF only.

 *

 * Return: 0 on success or a negative error code on failure.

 */

int xe_sriov_pf_control_resume_vf(struct xe_device *xe, unsigned int vfid)

{

	struct xe_gt *gt;

	unsigned int id;

	int result = 0;

	int err;



	for_each_gt(gt, xe, id) {

		err = xe_gt_sriov_pf_control_resume_vf(gt, vfid);

		result = result ? -EUCLEAN : err;

	}



	return result;

}



/**

 * xe_sriov_pf_control_stop_vf - Stop a VF on all GTs.

 * @xe: the &xe_device

 * @vfid: the VF identifier

 *

 * This function is for PF only.

 *

 * Return: 0 on success or a negative error code on failure.

 */

int xe_sriov_pf_control_stop_vf(struct xe_device *xe, unsigned int vfid)

{

	struct xe_gt *gt;

	unsigned int id;

	int result = 0;

	int err;



	for_each_gt(gt, xe, id) {

		err = xe_gt_sriov_pf_control_stop_vf(gt, vfid);

		result = result ? -EUCLEAN : err;

	}



	return result;

}



/**

 * xe_sriov_pf_control_reset_vf() - Perform a VF reset (FLR).

 * @xe: the &xe_device

 * @vfid: the VF identifier

 *

 * This function is for PF only.

 *

 * Return: 0 on success or a negative error code on failure.

 */

int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid)

{

	struct xe_gt *gt;

	unsigned int id;

	int result = 0;

	int err;



	for_each_gt(gt, xe, id) {

		err = xe_gt_sriov_pf_control_trigger_flr(gt, vfid);

		result = result ? -EUCLEAN : err;

	}



	return result;

}

drivers/gpu/drm/xe/xe_sriov_pf_control.h

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+16 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: MIT */

/*

 * Copyright © 2025 Intel Corporation

 */



#ifndef _XE_SRIOV_PF_CONTROL_H_

#define _XE_SRIOV_PF_CONTROL_H_



struct xe_device;



int xe_sriov_pf_control_pause_vf(struct xe_device *xe, unsigned int vfid);

int xe_sriov_pf_control_resume_vf(struct xe_device *xe, unsigned int vfid);

int xe_sriov_pf_control_stop_vf(struct xe_device *xe, unsigned int vfid);

int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid);



#endif