2  * SPDX-License-Identifier: MIT
28 	GEM_TRACE("%s\n", dev_name(i915->drm.dev));  in i915_gem_suspend()
30 	intel_wakeref_auto(&i915->runtime_pm.userfault_wakeref, 0);  in i915_gem_suspend()
38 	flush_workqueue(i915->wq);  in i915_gem_suspend()
44 	 * leaves the i915->kernel_context still active when  in i915_gem_suspend()
45 	 * we actually suspend, and its image in memory may not match the GPU  in i915_gem_suspend()
58 	int ret = 0, id;  in lmem_restore()  local
60 	for_each_memory_region(mr, i915, id) {  in lmem_restore()
61 		if (mr->type == INTEL_MEMORY_LOCAL) {  in lmem_restore()
74 	int ret = 0, id;  in lmem_suspend()  local
76 	for_each_memory_region(mr, i915, id) {  in lmem_suspend()
77 		if (mr->type == INTEL_MEMORY_LOCAL) {  in lmem_suspend()
90 	int id;  in lmem_recover()  local
92 	for_each_memory_region(mr, i915, id)  in lmem_recover()
93 		if (mr->type == INTEL_MEMORY_LOCAL)  in lmem_recover()
114 	 * page-tables for the migrate context.  in i915_gem_backup_suspend()
141 		&i915->mm.shrink_list,  in i915_gem_suspend_late()
142 		&i915->mm.purge_list,  in i915_gem_suspend_late()
153 	 * so we need to reset the GPU back to legacy mode. And the only  in i915_gem_suspend_late()
154 	 * known way to disable logical contexts is through a GPU reset.  in i915_gem_suspend_late()
157 	 * always reset the GPU upon unload and suspend. Afterwards we then  in i915_gem_suspend_late()
161 	 * Note that is of the upmost importance that the GPU is idle and  in i915_gem_suspend_late()
165 	 * However, since we are uncertain that resetting the GPU on older  in i915_gem_suspend_late()
166 	 * machines is a good idea, we don't - just in case it leaves the  in i915_gem_suspend_late()
176 	spin_lock_irqsave(&i915->mm.obj_lock, flags);  in i915_gem_suspend_late()
179 			if (!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ))  in i915_gem_suspend_late()
180 				flush |= (obj->read_domains & I915_GEM_DOMAIN_CPU) == 0;  in i915_gem_suspend_late()
181 			__start_cpu_write(obj); /* presume auto-hibernate */  in i915_gem_suspend_late()
184 	spin_unlock_irqrestore(&i915->mm.obj_lock, flags);  in i915_gem_suspend_late()
219 	with_intel_runtime_pm(&i915->runtime_pm, wakeref)  in i915_gem_freeze_late()
220 		i915_gem_shrink(NULL, i915, -1UL, NULL, ~0);  in i915_gem_freeze_late()
224 	list_for_each_entry(obj, &i915->mm.shrink_list, mm.link)  in i915_gem_freeze_late()
235 	GEM_TRACE("%s\n", dev_name(i915->drm.dev));  in i915_gem_resume()
257 			dev_err(i915->drm.dev,  in i915_gem_resume()
258 				"Failed to re-initialize GPU[%u], declaring it wedged!\n",  in i915_gem_resume()