1 // SPDX-License-Identifier: MIT
32 	 * For example, if there are four compute slices available, the  in __xe_gt_apply_ccs_mode()
33 	 * assignment of compute slices to compute engines would be,  in __xe_gt_apply_ccs_mode()
48 	for (width = num_slices / num_engines; width; width--) {  in __xe_gt_apply_ccs_mode()
53 			if (hwe->class != XE_ENGINE_CLASS_COMPUTE)  in __xe_gt_apply_ccs_mode()
56 			if (hwe->logical_instance >= num_engines)  in __xe_gt_apply_ccs_mode()
59 			config |= BIT(hwe->instance) << XE_HW_ENGINE_CCS0;  in __xe_gt_apply_ccs_mode()
66 			mode |= CCS_MODE_CSLICE(cslice, hwe->instance);  in __xe_gt_apply_ccs_mode()
77 	xe_mmio_write32(&gt->mmio, CCS_MODE, mode);  in __xe_gt_apply_ccs_mode()
85 	if (!gt->ccs_mode || IS_SRIOV_VF(gt_to_xe(gt)))  in xe_gt_apply_ccs_mode()
88 	__xe_gt_apply_ccs_mode(gt, gt->ccs_mode);  in xe_gt_apply_ccs_mode()
95 	struct xe_gt *gt = kobj_to_gt(&kdev->kobj);  in num_cslices_show()
106 	struct xe_gt *gt = kobj_to_gt(&kdev->kobj);  in ccs_mode_show()
108 	return sysfs_emit(buf, "%u\n", gt->ccs_mode);  in ccs_mode_show()
115 	struct xe_gt *gt = kobj_to_gt(&kdev->kobj);  in ccs_mode_store()
121 		xe_gt_dbg(gt, "Can't change compute mode when running as %s\n",  in ccs_mode_store()
123 		return -EOPNOTSUPP;  in ccs_mode_store()
136 		xe_gt_dbg(gt, "Invalid compute config, %d engines %d slices\n",  in ccs_mode_store()
138 		return -EINVAL;  in ccs_mode_store()
142 	mutex_lock(&xe->drm.filelist_mutex);  in ccs_mode_store()
143 	if (!list_empty(&xe->drm.filelist)) {  in ccs_mode_store()
144 		mutex_unlock(&xe->drm.filelist_mutex);  in ccs_mode_store()
145 		xe_gt_dbg(gt, "Rejecting compute mode change as there are active drm clients\n");  in ccs_mode_store()
146 		return -EBUSY;  in ccs_mode_store()
149 	if (gt->ccs_mode != num_engines) {  in ccs_mode_store()
150 		xe_gt_info(gt, "Setting compute mode to %d\n", num_engines);  in ccs_mode_store()
151 		gt->ccs_mode = num_engines;  in ccs_mode_store()
156 	mutex_unlock(&xe->drm.filelist_mutex);  in ccs_mode_store()
173 	sysfs_remove_files(gt->sysfs, gt_ccs_mode_attrs);  in xe_gt_ccs_mode_sysfs_fini()
177  * xe_gt_ccs_mode_sysfs_init - Initialize CCS mode sysfs interfaces
180  * Through a per-gt 'ccs_mode' sysfs interface, the user can enable a fixed
181  * number of compute hardware engines to which the available compute slices
184  * The number of available compute slices is exposed to user through a per-gt
197 	err = sysfs_create_files(gt->sysfs, gt_ccs_mode_attrs);  in xe_gt_ccs_mode_sysfs_init()
201 	return devm_add_action_or_reset(xe->drm.dev, xe_gt_ccs_mode_sysfs_fini, gt);  in xe_gt_ccs_mode_sysfs_init()