Commit 7dbed0fd authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/pf: Add functions to configure VF scheduling priority 



Add functions to configure PF or VF scheduling priority using the
VF_CFG_SCHED_PRIORITY KLV.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarLukasz Laguna <lukasz.laguna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241106151301.2079-4-michal.wajdeczko@intel.com
parent 5a814e3a

drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c

+76 −0
Original line number Diff line number Diff line
@@ -207,6 +207,11 @@ static int pf_push_vf_cfg_preempt_timeout(struct xe_gt *gt, unsigned int vfid, u 
	return pf_push_vf_cfg_u32(gt, vfid, GUC_KLV_VF_CFG_PREEMPT_TIMEOUT_KEY, *preempt_timeout);

}



static int pf_push_vf_cfg_sched_priority(struct xe_gt *gt, unsigned int vfid, u32 priority)

{

	return pf_push_vf_cfg_u32(gt, vfid, GUC_KLV_VF_CFG_SCHED_PRIORITY_KEY, priority);

}



static int pf_push_vf_cfg_lmem(struct xe_gt *gt, unsigned int vfid, u64 size)

{

	return pf_push_vf_cfg_u64(gt, vfid, GUC_KLV_VF_CFG_LMEM_SIZE_KEY, size);
@@ -1767,6 +1772,77 @@ u32 xe_gt_sriov_pf_config_get_preempt_timeout(struct xe_gt *gt, unsigned int vfi 
	return preempt_timeout;

}



static const char *sched_priority_unit(u32 priority)

{

	return priority == GUC_SCHED_PRIORITY_LOW ? "(low)" :

		priority == GUC_SCHED_PRIORITY_NORMAL ? "(normal)" :

		priority == GUC_SCHED_PRIORITY_HIGH ? "(high)" :

		"(?)";

}



static int pf_provision_sched_priority(struct xe_gt *gt, unsigned int vfid, u32 priority)

{

	struct xe_gt_sriov_config *config = pf_pick_vf_config(gt, vfid);

	int err;



	err = pf_push_vf_cfg_sched_priority(gt, vfid, priority);

	if (unlikely(err))

		return err;



	config->sched_priority = priority;

	return 0;

}



static int pf_get_sched_priority(struct xe_gt *gt, unsigned int vfid)

{

	struct xe_gt_sriov_config *config = pf_pick_vf_config(gt, vfid);



	return config->sched_priority;

}



/**

 * xe_gt_sriov_pf_config_set_sched_priority() - Configure scheduling priority.

 * @gt: the &xe_gt

 * @vfid: the VF identifier

 * @priority: requested scheduling priority

 *

 * This function can only be called on PF.

 *

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

 */

int xe_gt_sriov_pf_config_set_sched_priority(struct xe_gt *gt, unsigned int vfid, u32 priority)

{

	int err;



	mutex_lock(xe_gt_sriov_pf_master_mutex(gt));

	err = pf_provision_sched_priority(gt, vfid, priority);

	mutex_unlock(xe_gt_sriov_pf_master_mutex(gt));



	return pf_config_set_u32_done(gt, vfid, priority,

				      xe_gt_sriov_pf_config_get_sched_priority(gt, vfid),

				      "scheduling priority", sched_priority_unit, err);

}



/**

 * xe_gt_sriov_pf_config_get_sched_priority - Get VF's scheduling priority.

 * @gt: the &xe_gt

 * @vfid: the VF identifier

 *

 * This function can only be called on PF.

 *

 * Return: VF's (or PF's) scheduling priority.

 */

u32 xe_gt_sriov_pf_config_get_sched_priority(struct xe_gt *gt, unsigned int vfid)

{

	u32 priority;



	mutex_lock(xe_gt_sriov_pf_master_mutex(gt));

	priority = pf_get_sched_priority(gt, vfid);

	mutex_unlock(xe_gt_sriov_pf_master_mutex(gt));



	return priority;

}



static void pf_reset_config_sched(struct xe_gt *gt, struct xe_gt_sriov_config *config)

{

	lockdep_assert_held(xe_gt_sriov_pf_master_mutex(gt));

drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h

+3 −0
Original line number Diff line number Diff line
@@ -44,6 +44,9 @@ u32 xe_gt_sriov_pf_config_get_preempt_timeout(struct xe_gt *gt, unsigned int vfi 
int xe_gt_sriov_pf_config_set_preempt_timeout(struct xe_gt *gt, unsigned int vfid,

					      u32 preempt_timeout);



u32 xe_gt_sriov_pf_config_get_sched_priority(struct xe_gt *gt, unsigned int vfid);

int xe_gt_sriov_pf_config_set_sched_priority(struct xe_gt *gt, unsigned int vfid, u32 priority);



u32 xe_gt_sriov_pf_config_get_threshold(struct xe_gt *gt, unsigned int vfid,

					enum xe_guc_klv_threshold_index index);

int xe_gt_sriov_pf_config_set_threshold(struct xe_gt *gt, unsigned int vfid,

drivers/gpu/drm/xe/xe_gt_sriov_pf_config_types.h

+2 −0
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ struct xe_gt_sriov_config { 
	u32 exec_quantum;

	/** @preempt_timeout: preemption timeout in microseconds. */

	u32 preempt_timeout;

	/** @sched_priority: scheduling priority. */

	u32 sched_priority;

	/** @thresholds: GuC thresholds for adverse events notifications. */

	u32 thresholds[XE_GUC_KLV_NUM_THRESHOLDS];

};