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> } > > +static int pf_validate_vf_config(struct xe_gt *gt, unsigned int vfid) > +{ > + struct xe_gt *primary_gt = gt_to_tile(gt)->primary_gt; > + struct xe_device *xe = gt_to_xe(gt); > + bool valid_ggtt, valid_ctxs, valid_dbs; > + bool valid_any, valid_all; > + > + valid_ggtt = pf_get_vf_config_ggtt(primary_gt, vfid); > + valid_ctxs = pf_get_vf_config_ctxs(gt, vfid); > + valid_dbs = pf_get_vf_config_dbs(gt, vfid); > + > + /* note that GuC doorbells are optional */ > + valid_any = valid_ggtt || valid_ctxs || valid_dbs; > + valid_all = valid_ggtt && valid_ctxs; > + > + if (IS_DGFX(xe)) { > + bool valid_lmem = pf_get_vf_config_ggtt(primary_gt, vfid); > + > + valid_any = valid_any || valid_lmem; > + valid_all = valid_all && valid_lmem; > + } > + > + return valid_all ? 1 : valid_any ? -ENOKEY : -ENODATA; > +} > + > +/** > + * xe_gt_sriov_pf_config_is_empty - Check VF's configuration. > + * @gt: the &xe_gt > + * @vfid: the VF identifier (can't be PF) > + * > + * This function can only be called on PF. > + * > + * Return: true if VF mandatory configuration (GGTT, LMEM, ...) is empty. > + */ > +bool xe_gt_sriov_pf_config_is_empty(struct xe_gt *gt, unsigned int vfid) > +{ > + bool empty; > + > + xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt))); > + xe_gt_assert(gt, vfid); > + > + mutex_lock(xe_gt_sriov_pf_master_mutex(gt)); > + empty = pf_validate_vf_config(gt, vfid) == -ENODATA; > + mutex_unlock(xe_gt_sriov_pf_master_mutex(gt)); > + > + return empty; > +} > + > /** > * xe_gt_sriov_pf_config_print_ggtt - Print GGTT configurations. > * @gt: the &xe_gt > diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h > index e8238c1ad06a..58c8f879d7ab 100644 > --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h > +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h > @@ -53,6 +53,8 @@ int xe_gt_sriov_pf_config_set_fair(struct xe_gt *gt, unsigned int vfid, unsigned > int xe_gt_sriov_pf_config_release(struct xe_gt *gt, unsigned int vfid, bool force); > int xe_gt_sriov_pf_config_push(struct xe_gt *gt, unsigned int vfid, bool refresh); > > +bool xe_gt_sriov_pf_config_is_empty(struct xe_gt *gt, unsigned int vfid); > + > int xe_gt_sriov_pf_config_print_ggtt(struct xe_gt *gt, struct drm_printer *p); > int xe_gt_sriov_pf_config_print_ctxs(struct xe_gt *gt, struct drm_printer *p); > int xe_gt_sriov_pf_config_print_dbs(struct xe_gt *gt, struct drm_printer *p); > diff --git a/drivers/gpu/drm/xe/xe_pci_sriov.c b/drivers/gpu/drm/xe/xe_pci_sriov.c > index 74c8fadc9365..aaceee748287 100644 > --- a/drivers/gpu/drm/xe/xe_pci_sriov.c > +++ b/drivers/gpu/drm/xe/xe_pci_sriov.c > @@ -13,6 +13,17 @@ > #include "xe_sriov_pf_helpers.h" > #include "xe_sriov_printk.h" > > +static int pf_needs_provisioning(struct xe_gt *gt, unsigned int num_vfs) > +{ > + unsigned int n; > + > + for (n = 1; n <= num_vfs; n++) > + if (!xe_gt_sriov_pf_config_is_empty(gt, n)) > + return false; > + > + return true; > +} > + > static int pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs) > { > struct xe_gt *gt; > @@ -20,6 +31,8 @@ static int pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs) > int result = 0, err; > > for_each_gt(gt, xe, id) { > + if (!pf_needs_provisioning(gt, num_vfs)) > + continue; > err = xe_gt_sriov_pf_config_set_fair(gt, VFID(1), num_vfs); > result = result ?: err; > } LGTM: Reviewed-by: Piotr Piórkowski > -- > 2.43.0 > --