1e3adcf8fSFrançois Tigeot /* 2e3adcf8fSFrançois Tigeot * Copyright © 2008-2010 Intel Corporation 3e3adcf8fSFrançois Tigeot * 4e3adcf8fSFrançois Tigeot * Permission is hereby granted, free of charge, to any person obtaining a 5e3adcf8fSFrançois Tigeot * copy of this software and associated documentation files (the "Software"), 6e3adcf8fSFrançois Tigeot * to deal in the Software without restriction, including without limitation 7e3adcf8fSFrançois Tigeot * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8e3adcf8fSFrançois Tigeot * and/or sell copies of the Software, and to permit persons to whom the 9e3adcf8fSFrançois Tigeot * Software is furnished to do so, subject to the following conditions: 10e3adcf8fSFrançois Tigeot * 11e3adcf8fSFrançois Tigeot * The above copyright notice and this permission notice (including the next 12e3adcf8fSFrançois Tigeot * paragraph) shall be included in all copies or substantial portions of the 13e3adcf8fSFrançois Tigeot * Software. 14e3adcf8fSFrançois Tigeot * 15e3adcf8fSFrançois Tigeot * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16e3adcf8fSFrançois Tigeot * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17e3adcf8fSFrançois Tigeot * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18e3adcf8fSFrançois Tigeot * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19e3adcf8fSFrançois Tigeot * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20e3adcf8fSFrançois Tigeot * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21e3adcf8fSFrançois Tigeot * IN THE SOFTWARE. 22e3adcf8fSFrançois Tigeot * 23e3adcf8fSFrançois Tigeot * Authors: 24e3adcf8fSFrançois Tigeot * Eric Anholt <eric@anholt.net> 25e3adcf8fSFrançois Tigeot * Chris Wilson <chris@chris-wilson.co.uuk> 26e3adcf8fSFrançois Tigeot * 27e3adcf8fSFrançois Tigeot */ 28e3adcf8fSFrançois Tigeot 2918e26a6dSFrançois Tigeot #include <drm/drmP.h> 30a2fdbec6SFrançois Tigeot #include <drm/i915_drm.h> 319edbd4a0SFrançois Tigeot 329edbd4a0SFrançois Tigeot #include "i915_drv.h" 339edbd4a0SFrançois Tigeot #include "intel_drv.h" 34a2fdbec6SFrançois Tigeot #include "i915_trace.h" 35e3adcf8fSFrançois Tigeot 36e3adcf8fSFrançois Tigeot static bool 379edbd4a0SFrançois Tigeot mark_free(struct i915_vma *vma, struct list_head *unwind) 38e3adcf8fSFrançois Tigeot { 39ba55f2f5SFrançois Tigeot if (vma->pin_count) 40e9243325SFrançois Tigeot return false; 41e9243325SFrançois Tigeot 429edbd4a0SFrançois Tigeot if (WARN_ON(!list_empty(&vma->exec_list))) 439edbd4a0SFrançois Tigeot return false; 449edbd4a0SFrançois Tigeot 459edbd4a0SFrançois Tigeot list_add(&vma->exec_list, unwind); 469edbd4a0SFrançois Tigeot return drm_mm_scan_add_block(&vma->node); 47e3adcf8fSFrançois Tigeot } 48e3adcf8fSFrançois Tigeot 49ba55f2f5SFrançois Tigeot /** 50ba55f2f5SFrançois Tigeot * i915_gem_evict_something - Evict vmas to make room for binding a new one 51ba55f2f5SFrançois Tigeot * @dev: drm_device 52ba55f2f5SFrançois Tigeot * @vm: address space to evict from 53*2c9916cdSFrançois Tigeot * @min_size: size of the desired free space 54ba55f2f5SFrançois Tigeot * @alignment: alignment constraint of the desired free space 55ba55f2f5SFrançois Tigeot * @cache_level: cache_level for the desired space 56*2c9916cdSFrançois Tigeot * @start: start (inclusive) of the range from which to evict objects 57*2c9916cdSFrançois Tigeot * @end: end (exclusive) of the range from which to evict objects 58*2c9916cdSFrançois Tigeot * @flags: additional flags to control the eviction algorithm 59ba55f2f5SFrançois Tigeot * 60ba55f2f5SFrançois Tigeot * This function will try to evict vmas until a free space satisfying the 61ba55f2f5SFrançois Tigeot * requirements is found. Callers must check first whether any such hole exists 62ba55f2f5SFrançois Tigeot * already before calling this function. 63ba55f2f5SFrançois Tigeot * 64ba55f2f5SFrançois Tigeot * This function is used by the object/vma binding code. 65ba55f2f5SFrançois Tigeot * 66ba55f2f5SFrançois Tigeot * To clarify: This is for freeing up virtual address space, not for freeing 67ba55f2f5SFrançois Tigeot * memory in e.g. the shrinker. 68ba55f2f5SFrançois Tigeot */ 69e3adcf8fSFrançois Tigeot int 709edbd4a0SFrançois Tigeot i915_gem_evict_something(struct drm_device *dev, struct i915_address_space *vm, 719edbd4a0SFrançois Tigeot int min_size, unsigned alignment, unsigned cache_level, 72ba55f2f5SFrançois Tigeot unsigned long start, unsigned long end, 73ba55f2f5SFrançois Tigeot unsigned flags) 74e3adcf8fSFrançois Tigeot { 75e3adcf8fSFrançois Tigeot struct list_head eviction_list, unwind_list; 769edbd4a0SFrançois Tigeot struct i915_vma *vma; 77e3adcf8fSFrançois Tigeot int ret = 0; 789edbd4a0SFrançois Tigeot int pass = 0; 79e3adcf8fSFrançois Tigeot 80ba55f2f5SFrançois Tigeot trace_i915_gem_evict(dev, min_size, alignment, flags); 81a2fdbec6SFrançois Tigeot 82e3adcf8fSFrançois Tigeot /* 83e3adcf8fSFrançois Tigeot * The goal is to evict objects and amalgamate space in LRU order. 84e3adcf8fSFrançois Tigeot * The oldest idle objects reside on the inactive list, which is in 85e3adcf8fSFrançois Tigeot * retirement order. The next objects to retire are those on the (per 86e3adcf8fSFrançois Tigeot * ring) active list that do not have an outstanding flush. Once the 87e3adcf8fSFrançois Tigeot * hardware reports completion (the seqno is updated after the 88e3adcf8fSFrançois Tigeot * batchbuffer has been finished) the clean buffer objects would 89e3adcf8fSFrançois Tigeot * be retired to the inactive list. Any dirty objects would be added 90e3adcf8fSFrançois Tigeot * to the tail of the flushing list. So after processing the clean 91e3adcf8fSFrançois Tigeot * active objects we need to emit a MI_FLUSH to retire the flushing 92e3adcf8fSFrançois Tigeot * list, hence the retirement order of the flushing list is in 93e3adcf8fSFrançois Tigeot * advance of the dirty objects on the active lists. 94e3adcf8fSFrançois Tigeot * 95e3adcf8fSFrançois Tigeot * The retirement sequence is thus: 96e3adcf8fSFrançois Tigeot * 1. Inactive objects (already retired) 97e3adcf8fSFrançois Tigeot * 2. Clean active objects 98e3adcf8fSFrançois Tigeot * 3. Flushing list 99e3adcf8fSFrançois Tigeot * 4. Dirty active objects. 100e3adcf8fSFrançois Tigeot * 101e3adcf8fSFrançois Tigeot * On each list, the oldest objects lie at the HEAD with the freshest 102e3adcf8fSFrançois Tigeot * object on the TAIL. 103e3adcf8fSFrançois Tigeot */ 104e3adcf8fSFrançois Tigeot 105e3adcf8fSFrançois Tigeot INIT_LIST_HEAD(&unwind_list); 106ba55f2f5SFrançois Tigeot if (start != 0 || end != vm->total) { 1079edbd4a0SFrançois Tigeot drm_mm_init_scan_with_range(&vm->mm, min_size, 108ba55f2f5SFrançois Tigeot alignment, cache_level, 109ba55f2f5SFrançois Tigeot start, end); 1109edbd4a0SFrançois Tigeot } else 1119edbd4a0SFrançois Tigeot drm_mm_init_scan(&vm->mm, min_size, alignment, cache_level); 112e3adcf8fSFrançois Tigeot 1139edbd4a0SFrançois Tigeot search_again: 114e3adcf8fSFrançois Tigeot /* First see if there is a large enough contiguous idle region... */ 1159edbd4a0SFrançois Tigeot list_for_each_entry(vma, &vm->inactive_list, mm_list) { 1169edbd4a0SFrançois Tigeot if (mark_free(vma, &unwind_list)) 117e3adcf8fSFrançois Tigeot goto found; 118e3adcf8fSFrançois Tigeot } 119e3adcf8fSFrançois Tigeot 120ba55f2f5SFrançois Tigeot if (flags & PIN_NONBLOCK) 1219f16360bSFrançois Tigeot goto none; 1229f16360bSFrançois Tigeot 123e3adcf8fSFrançois Tigeot /* Now merge in the soon-to-be-expired objects... */ 1249edbd4a0SFrançois Tigeot list_for_each_entry(vma, &vm->active_list, mm_list) { 1259edbd4a0SFrançois Tigeot if (mark_free(vma, &unwind_list)) 126e3adcf8fSFrançois Tigeot goto found; 127e3adcf8fSFrançois Tigeot } 128e3adcf8fSFrançois Tigeot 1299f16360bSFrançois Tigeot none: 130e3adcf8fSFrançois Tigeot /* Nothing found, clean up and bail out! */ 131e3adcf8fSFrançois Tigeot while (!list_empty(&unwind_list)) { 1329edbd4a0SFrançois Tigeot vma = list_first_entry(&unwind_list, 1339edbd4a0SFrançois Tigeot struct i915_vma, 134e3adcf8fSFrançois Tigeot exec_list); 1359edbd4a0SFrançois Tigeot ret = drm_mm_scan_remove_block(&vma->node); 136f192107fSFrançois Tigeot BUG_ON(ret); 137e3adcf8fSFrançois Tigeot 1389edbd4a0SFrançois Tigeot list_del_init(&vma->exec_list); 139e3adcf8fSFrançois Tigeot } 140e3adcf8fSFrançois Tigeot 1419edbd4a0SFrançois Tigeot /* Can we unpin some objects such as idle hw contents, 1429edbd4a0SFrançois Tigeot * or pending flips? 143e3adcf8fSFrançois Tigeot */ 144ba55f2f5SFrançois Tigeot if (flags & PIN_NONBLOCK) 145e3adcf8fSFrançois Tigeot return -ENOSPC; 146e3adcf8fSFrançois Tigeot 1479edbd4a0SFrançois Tigeot /* Only idle the GPU and repeat the search once */ 1489edbd4a0SFrançois Tigeot if (pass++ == 0) { 1499edbd4a0SFrançois Tigeot ret = i915_gpu_idle(dev); 1509edbd4a0SFrançois Tigeot if (ret) 1519edbd4a0SFrançois Tigeot return ret; 1529edbd4a0SFrançois Tigeot 1539edbd4a0SFrançois Tigeot i915_gem_retire_requests(dev); 1549edbd4a0SFrançois Tigeot goto search_again; 1559edbd4a0SFrançois Tigeot } 1569edbd4a0SFrançois Tigeot 1579edbd4a0SFrançois Tigeot /* If we still have pending pageflip completions, drop 1589edbd4a0SFrançois Tigeot * back to userspace to give our workqueues time to 1599edbd4a0SFrançois Tigeot * acquire our locks and unpin the old scanouts. 1609edbd4a0SFrançois Tigeot */ 1619edbd4a0SFrançois Tigeot return intel_has_pending_fb_unpin(dev) ? -EAGAIN : -ENOSPC; 1629edbd4a0SFrançois Tigeot 163e3adcf8fSFrançois Tigeot found: 164e3adcf8fSFrançois Tigeot /* drm_mm doesn't allow any other other operations while 165e3adcf8fSFrançois Tigeot * scanning, therefore store to be evicted objects on a 166e3adcf8fSFrançois Tigeot * temporary list. */ 167e3adcf8fSFrançois Tigeot INIT_LIST_HEAD(&eviction_list); 168e3adcf8fSFrançois Tigeot while (!list_empty(&unwind_list)) { 1699edbd4a0SFrançois Tigeot vma = list_first_entry(&unwind_list, 1709edbd4a0SFrançois Tigeot struct i915_vma, 171e3adcf8fSFrançois Tigeot exec_list); 1729edbd4a0SFrançois Tigeot if (drm_mm_scan_remove_block(&vma->node)) { 1739edbd4a0SFrançois Tigeot list_move(&vma->exec_list, &eviction_list); 1749edbd4a0SFrançois Tigeot drm_gem_object_reference(&vma->obj->base); 175e3adcf8fSFrançois Tigeot continue; 176e3adcf8fSFrançois Tigeot } 1779edbd4a0SFrançois Tigeot list_del_init(&vma->exec_list); 178e3adcf8fSFrançois Tigeot } 179e3adcf8fSFrançois Tigeot 180e3adcf8fSFrançois Tigeot /* Unbinding will emit any required flushes */ 181e3adcf8fSFrançois Tigeot while (!list_empty(&eviction_list)) { 1829edbd4a0SFrançois Tigeot struct drm_gem_object *obj; 1839edbd4a0SFrançois Tigeot vma = list_first_entry(&eviction_list, 1849edbd4a0SFrançois Tigeot struct i915_vma, 185e3adcf8fSFrançois Tigeot exec_list); 186e3adcf8fSFrançois Tigeot 1879edbd4a0SFrançois Tigeot obj = &vma->obj->base; 1889edbd4a0SFrançois Tigeot list_del_init(&vma->exec_list); 1899edbd4a0SFrançois Tigeot if (ret == 0) 1909edbd4a0SFrançois Tigeot ret = i915_vma_unbind(vma); 1919edbd4a0SFrançois Tigeot 1929edbd4a0SFrançois Tigeot drm_gem_object_unreference(obj); 193e3adcf8fSFrançois Tigeot } 194e3adcf8fSFrançois Tigeot 195e3adcf8fSFrançois Tigeot return ret; 196e3adcf8fSFrançois Tigeot } 197e3adcf8fSFrançois Tigeot 1989edbd4a0SFrançois Tigeot /** 199ba55f2f5SFrançois Tigeot * i915_gem_evict_vm - Evict all idle vmas from a vm 200ba55f2f5SFrançois Tigeot * @vm: Address space to cleanse 2019edbd4a0SFrançois Tigeot * @do_idle: Boolean directing whether to idle first. 2029edbd4a0SFrançois Tigeot * 203ba55f2f5SFrançois Tigeot * This function evicts all idles vmas from a vm. If all unpinned vmas should be 204ba55f2f5SFrançois Tigeot * evicted the @do_idle needs to be set to true. 2059edbd4a0SFrançois Tigeot * 206ba55f2f5SFrançois Tigeot * This is used by the execbuf code as a last-ditch effort to defragment the 207ba55f2f5SFrançois Tigeot * address space. 208ba55f2f5SFrançois Tigeot * 209ba55f2f5SFrançois Tigeot * To clarify: This is for freeing up virtual address space, not for freeing 210ba55f2f5SFrançois Tigeot * memory in e.g. the shrinker. 2119edbd4a0SFrançois Tigeot */ 2129edbd4a0SFrançois Tigeot int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle) 2139edbd4a0SFrançois Tigeot { 2149edbd4a0SFrançois Tigeot struct i915_vma *vma, *next; 2159edbd4a0SFrançois Tigeot int ret; 2169edbd4a0SFrançois Tigeot 217*2c9916cdSFrançois Tigeot WARN_ON(!mutex_is_locked(&vm->dev->struct_mutex)); 2189edbd4a0SFrançois Tigeot trace_i915_gem_evict_vm(vm); 2199edbd4a0SFrançois Tigeot 2209edbd4a0SFrançois Tigeot if (do_idle) { 2219edbd4a0SFrançois Tigeot ret = i915_gpu_idle(vm->dev); 2229edbd4a0SFrançois Tigeot if (ret) 2239edbd4a0SFrançois Tigeot return ret; 2249edbd4a0SFrançois Tigeot 2259edbd4a0SFrançois Tigeot i915_gem_retire_requests(vm->dev); 226*2c9916cdSFrançois Tigeot 227*2c9916cdSFrançois Tigeot WARN_ON(!list_empty(&vm->active_list)); 2289edbd4a0SFrançois Tigeot } 2299edbd4a0SFrançois Tigeot 2309edbd4a0SFrançois Tigeot list_for_each_entry_safe(vma, next, &vm->inactive_list, mm_list) 231ba55f2f5SFrançois Tigeot if (vma->pin_count == 0) 2329edbd4a0SFrançois Tigeot WARN_ON(i915_vma_unbind(vma)); 2339edbd4a0SFrançois Tigeot 2349edbd4a0SFrançois Tigeot return 0; 2359edbd4a0SFrançois Tigeot } 2369edbd4a0SFrançois Tigeot 237ba55f2f5SFrançois Tigeot /** 238ba55f2f5SFrançois Tigeot * i915_gem_evict_everything - Try to evict all objects 239ba55f2f5SFrançois Tigeot * @dev: Device to evict objects for 240ba55f2f5SFrançois Tigeot * 241ba55f2f5SFrançois Tigeot * This functions tries to evict all gem objects from all address spaces. Used 242ba55f2f5SFrançois Tigeot * by the shrinker as a last-ditch effort and for suspend, before releasing the 243ba55f2f5SFrançois Tigeot * backing storage of all unbound objects. 244ba55f2f5SFrançois Tigeot */ 245e3adcf8fSFrançois Tigeot int 246686a02f1SFrançois Tigeot i915_gem_evict_everything(struct drm_device *dev) 247e3adcf8fSFrançois Tigeot { 248ba55f2f5SFrançois Tigeot struct drm_i915_private *dev_priv = dev->dev_private; 2491b13d190SFrançois Tigeot struct i915_address_space *vm, *v; 2509edbd4a0SFrançois Tigeot bool lists_empty = true; 251686a02f1SFrançois Tigeot int ret; 252e3adcf8fSFrançois Tigeot 2539edbd4a0SFrançois Tigeot list_for_each_entry(vm, &dev_priv->vm_list, global_link) { 2549edbd4a0SFrançois Tigeot lists_empty = (list_empty(&vm->inactive_list) && 2559edbd4a0SFrançois Tigeot list_empty(&vm->active_list)); 2569edbd4a0SFrançois Tigeot if (!lists_empty) 2579edbd4a0SFrançois Tigeot lists_empty = false; 2589edbd4a0SFrançois Tigeot } 2599edbd4a0SFrançois Tigeot 260e3adcf8fSFrançois Tigeot if (lists_empty) 261e3adcf8fSFrançois Tigeot return -ENOSPC; 262e3adcf8fSFrançois Tigeot 263a2fdbec6SFrançois Tigeot trace_i915_gem_evict_everything(dev); 264a2fdbec6SFrançois Tigeot 265686a02f1SFrançois Tigeot /* The gpu_idle will flush everything in the write domain to the 266686a02f1SFrançois Tigeot * active list. Then we must move everything off the active list 267686a02f1SFrançois Tigeot * with retire requests. 268686a02f1SFrançois Tigeot */ 269b030f26bSFrançois Tigeot ret = i915_gpu_idle(dev); 270e3adcf8fSFrançois Tigeot if (ret) 271e3adcf8fSFrançois Tigeot return ret; 272e3adcf8fSFrançois Tigeot 273686a02f1SFrançois Tigeot i915_gem_retire_requests(dev); 274e3adcf8fSFrançois Tigeot 275686a02f1SFrançois Tigeot /* Having flushed everything, unbind() should never raise an error */ 2761b13d190SFrançois Tigeot list_for_each_entry_safe(vm, v, &dev_priv->vm_list, global_link) 2779edbd4a0SFrançois Tigeot WARN_ON(i915_gem_evict_vm(vm, false)); 278e3adcf8fSFrançois Tigeot 279e3adcf8fSFrançois Tigeot return 0; 280e3adcf8fSFrançois Tigeot } 281