1 // SPDX-License-Identifier: MIT
17  * DOC: Xe GT Idle
19  * Contains functions that init GT idle features like C6
21  * device/gt#/gtidle/name - name of the state
22  * device/gt#/gtidle/idle_residency_ms - Provides residency of the idle state in ms
23  * device/gt#/gtidle/idle_status - Provides current idle state
28 	struct kobject *kobj = &dev->kobj;  in dev_to_gtidle()
30 	return &kobj_to_gt(kobj->parent)->gtidle;  in dev_to_gtidle()
40 	return &gtidle_to_gt(gtidle)->uc.guc.pc;  in gtidle_to_pc()
43 static const char *gt_idle_state_to_string(enum xe_gt_idle_state state)  in gt_idle_state_to_string()  argument
45 	switch (state) {  in gt_idle_state_to_string()
47 		return "gt-c0";  in gt_idle_state_to_string()
49 		return "gt-c6";  in gt_idle_state_to_string()
63 	 * Store previous hw counter values for counter wrap-around handling  in get_residency_ms()
66 	prev_residency = gtidle->prev_residency;  in get_residency_ms()
67 	gtidle->prev_residency = cur_residency;  in get_residency_ms()
71 		delta = cur_residency - prev_residency;  in get_residency_ms()
73 		delta = cur_residency + (overflow_residency - prev_residency);  in get_residency_ms()
75 	/* Add delta to extended raw driver copy of idle residency */  in get_residency_ms()
76 	cur_residency = gtidle->cur_residency + delta;  in get_residency_ms()
77 	gtidle->cur_residency = cur_residency;  in get_residency_ms()
80 	cur_residency = mul_u64_u32_div(cur_residency, gtidle->residency_multiplier, 1e6);  in get_residency_ms()
90 	return sysfs_emit(buff, "%s\n", gtidle->name);  in name_show()
92 static DEVICE_ATTR_RO(name);
99 	enum xe_gt_idle_state state;  in idle_status_show()  local
101 	state = gtidle->idle_status(pc);  in idle_status_show()
103 	return sysfs_emit(buff, "%s\n", gt_idle_state_to_string(state));  in idle_status_show()
114 	residency = gtidle->idle_residency(pc);  in idle_residency_ms_show()
141 	kobj = kobject_create_and_add("gtidle", gt->sysfs);  in xe_gt_idle_sysfs_init()
143 		drm_warn(&xe->drm, "%s failed, err: %d\n", __func__, -ENOMEM);  in xe_gt_idle_sysfs_init()
148 		sprintf(gtidle->name, "gt%d-mc", gt->info.id);  in xe_gt_idle_sysfs_init()
149 		gtidle->idle_residency = xe_guc_pc_mc6_residency;  in xe_gt_idle_sysfs_init()
151 		sprintf(gtidle->name, "gt%d-rc", gt->info.id);  in xe_gt_idle_sysfs_init()
152 		gtidle->idle_residency = xe_guc_pc_rc6_residency;  in xe_gt_idle_sysfs_init()
156 	gtidle->residency_multiplier = 1280;  in xe_gt_idle_sysfs_init()
157 	gtidle->idle_status = xe_guc_pc_c_status;  in xe_gt_idle_sysfs_init()
162 		drm_warn(&xe->drm, "failed to register gtidle sysfs, err: %d\n", err);  in xe_gt_idle_sysfs_init()
166 	err = drmm_add_action_or_reset(&xe->drm, gt_idle_sysfs_fini, kobj);  in xe_gt_idle_sysfs_init()
168 		drm_warn(&xe->drm, "%s: drmm_add_action_or_reset failed, err: %d\n",  in xe_gt_idle_sysfs_init()