Commit 23ceec1e authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/pf: Add functions to provision scheduling priority 



We already have function to configure PF (or VF) scheduling priority
on a single GT, but we also need function that will cover all tiles
and GTs.

However, due to the current GuC FW limitation, we can't always rely
on per-GT function as it actually only works for the PF case. The
only way to change VFs scheduling priority is to use 'sched_if_idle'
policy KLV that will change priorities for all VFs (and the PF).

We will use these new functions in the upcoming patches.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20251030222348.186658-12-michal.wajdeczko@intel.com
parent 71f5933c

drivers/gpu/drm/xe/xe_sriov_pf_provision.c

+93 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include "xe_assert.h"

#include "xe_device.h"

#include "xe_gt_sriov_pf_config.h"

#include "xe_gt_sriov_pf_policy.h"

#include "xe_sriov.h"

#include "xe_sriov_pf_helpers.h"

#include "xe_sriov_pf_provision.h"
@@ -343,3 +344,95 @@ int xe_sriov_pf_provision_query_vf_pt(struct xe_device *xe, unsigned int vfid, u 


	return !count ? -ENODATA : 0;

}



/**

 * xe_sriov_pf_provision_bulk_apply_priority() - Change scheduling priority of all VFs and PF.

 * @xe: the PF &xe_device

 * @prio: scheduling priority to set

 *

 * Change the scheduling priority provisioning on all tiles/GTs.

 *

 * This function can only be called on PF.

 *

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

 */

int xe_sriov_pf_provision_bulk_apply_priority(struct xe_device *xe, u32 prio)

{

	bool sched_if_idle;

	struct xe_gt *gt;

	unsigned int id;

	int result = 0;

	int err;



	/*

	 * Currently, priority changes that involves VFs are only allowed using

	 * the 'sched_if_idle' policy KLV, so only LOW and NORMAL are supported.

	 */

	xe_assert(xe, prio < GUC_SCHED_PRIORITY_HIGH);

	sched_if_idle = prio == GUC_SCHED_PRIORITY_NORMAL;



	for_each_gt(gt, xe, id) {

		err = xe_gt_sriov_pf_policy_set_sched_if_idle(gt, sched_if_idle);

		result = result ?: err;

	}



	return result;

}



/**

 * xe_sriov_pf_provision_apply_vf_priority() - Change VF's scheduling priority.

 * @xe: the PF &xe_device

 * @vfid: the VF identifier

 * @prio: scheduling priority to set

 *

 * Change VF's scheduling priority provisioning on all tiles/GTs.

 *

 * This function can only be called on PF.

 *

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

 */

int xe_sriov_pf_provision_apply_vf_priority(struct xe_device *xe, unsigned int vfid, u32 prio)

{

	struct xe_gt *gt;

	unsigned int id;

	int result = 0;

	int err;



	for_each_gt(gt, xe, id) {

		err = xe_gt_sriov_pf_config_set_sched_priority(gt, vfid, prio);

		result = result ?: err;

	}



	return result;

}



/**

 * xe_sriov_pf_provision_query_vf_priority() - Query VF's scheduling priority.

 * @xe: the PF &xe_device

 * @vfid: the VF identifier

 * @prio: placeholder for the returned scheduling priority

 *

 * Query VF's scheduling priority provisioning from all tiles/GTs.

 * If values across tiles/GTs are inconsistent then -EUCLEAN error will be returned.

 *

 * This function can only be called on PF.

 *

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

 */

int xe_sriov_pf_provision_query_vf_priority(struct xe_device *xe, unsigned int vfid, u32 *prio)

{

	struct xe_gt *gt;

	unsigned int id;

	int count = 0;

	u32 value;



	for_each_gt(gt, xe, id) {

		value = xe_gt_sriov_pf_config_get_sched_priority(gt, vfid);

		if (!count++)

			*prio = value;

		else if (value != *prio)

			return pf_report_unclean(gt, vfid, "priority", value, *prio);

	}



	return !count ? -ENODATA : 0;

}

drivers/gpu/drm/xe/xe_sriov_pf_provision.h

+4 −0
Original line number Diff line number Diff line
@@ -20,6 +20,10 @@ int xe_sriov_pf_provision_bulk_apply_pt(struct xe_device *xe, u32 pt); 
int xe_sriov_pf_provision_apply_vf_pt(struct xe_device *xe, unsigned int vfid, u32 pt);

int xe_sriov_pf_provision_query_vf_pt(struct xe_device *xe, unsigned int vfid, u32 *pt);



int xe_sriov_pf_provision_bulk_apply_priority(struct xe_device *xe, u32 prio);

int xe_sriov_pf_provision_apply_vf_priority(struct xe_device *xe, unsigned int vfid, u32 prio);

int xe_sriov_pf_provision_query_vf_priority(struct xe_device *xe, unsigned int vfid, u32 *prio);



int xe_sriov_pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs);

int xe_sriov_pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs);