Commit b52f8d7a authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/pf: Skip LMTT update if no LMEM was provisioned 



During VF unprovisioning, if VF was not provisioned with LMEM,
there is no need to trigger LMTT update, as VF LMTT was never
set. This will spare us sending full TLB invalidation requests.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Reviewed-by: default avatarJonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://lore.kernel.org/r/20250801144418.180584-1-michal.wajdeczko@intel.com
parent 1fdc4c38

drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c

+7 −3
Original line number Diff line number Diff line
@@ -1434,7 +1434,8 @@ static int pf_update_vf_lmtt(struct xe_device *xe, unsigned int vfid) 
	return err;

}



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

/* Return: %true if there was an LMEM provisioned, %false otherwise */

static bool pf_release_vf_config_lmem(struct xe_gt *gt, struct xe_gt_sriov_config *config)

{

	xe_gt_assert(gt, IS_DGFX(gt_to_xe(gt)));

	xe_gt_assert(gt, xe_gt_is_main_type(gt));
@@ -1443,7 +1444,9 @@ static void pf_release_vf_config_lmem(struct xe_gt *gt, struct xe_gt_sriov_confi 
	if (config->lmem_obj) {

		xe_bo_unpin_map_no_vm(config->lmem_obj);

		config->lmem_obj = NULL;

		return true;

	}

	return false;

}



static int pf_provision_vf_lmem(struct xe_gt *gt, unsigned int vfid, u64 size)
@@ -2021,12 +2024,13 @@ static void pf_release_vf_config(struct xe_gt *gt, unsigned int vfid) 
{

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

	struct xe_device *xe = gt_to_xe(gt);

	bool released;



	if (xe_gt_is_main_type(gt)) {

		pf_release_vf_config_ggtt(gt, config);

		if (IS_DGFX(xe)) {

			pf_release_vf_config_lmem(gt, config);

			if (xe_device_has_lmtt(xe))

			released = pf_release_vf_config_lmem(gt, config);

			if (released && xe_device_has_lmtt(xe))

				pf_update_vf_lmtt(xe, vfid);

		}

	}