2016-11-11 18:43:54 +08:00
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/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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2018-06-28 21:22:06 +08:00
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2016-11-11 18:43:54 +08:00
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#include "i915_vma.h"
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#include "i915_drv.h"
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#include "intel_ringbuffer.h"
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#include "intel_frontbuffer.h"
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#include <drm/drm_gem.h>
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2018-07-06 14:53:06 +08:00
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#if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM)
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2018-06-28 21:22:06 +08:00
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#include <linux/stackdepot.h>
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static void vma_print_allocator(struct i915_vma *vma, const char *reason)
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{
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unsigned long entries[12];
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struct stack_trace trace = {
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.entries = entries,
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.max_entries = ARRAY_SIZE(entries),
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};
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char buf[512];
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if (!vma->node.stack) {
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DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: unknown owner\n",
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vma->node.start, vma->node.size, reason);
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return;
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}
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depot_fetch_stack(vma->node.stack, &trace);
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snprint_stack_trace(buf, sizeof(buf), &trace, 0);
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DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: inserted at %s\n",
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vma->node.start, vma->node.size, reason, buf);
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}
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#else
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static void vma_print_allocator(struct i915_vma *vma, const char *reason)
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{
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}
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#endif
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2019-02-05 21:00:02 +08:00
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static void obj_bump_mru(struct drm_i915_gem_object *obj)
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{
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struct drm_i915_private *i915 = to_i915(obj->base.dev);
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2018-07-06 18:39:46 +08:00
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2019-02-05 21:00:02 +08:00
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spin_lock(&i915->mm.obj_lock);
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if (obj->bind_count)
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list_move_tail(&obj->mm.link, &i915->mm.bound_list);
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spin_unlock(&i915->mm.obj_lock);
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obj->mm.dirty = true; /* be paranoid */
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}
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static void __i915_vma_retire(struct i915_active *ref)
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2016-11-11 18:43:54 +08:00
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{
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2019-02-05 21:00:02 +08:00
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struct i915_vma *vma = container_of(ref, typeof(*vma), active);
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2016-11-11 18:43:54 +08:00
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struct drm_i915_gem_object *obj = vma->obj;
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GEM_BUG_ON(!i915_gem_object_is_active(obj));
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if (--obj->active_count)
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return;
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2017-11-08 06:06:56 +08:00
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/* Prune the shared fence arrays iff completely idle (inc. external) */
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if (reservation_object_trylock(obj->resv)) {
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if (reservation_object_test_signaled_rcu(obj->resv, true))
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reservation_object_add_excl_fence(obj->resv, NULL);
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reservation_object_unlock(obj->resv);
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}
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2019-02-05 21:00:02 +08:00
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/*
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* Bump our place on the bound list to keep it roughly in LRU order
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2016-11-11 18:43:54 +08:00
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* so that we don't steal from recently used but inactive objects
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* (unless we are forced to ofc!)
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*/
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2019-02-05 21:00:02 +08:00
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obj_bump_mru(obj);
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2016-11-11 18:43:54 +08:00
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if (i915_gem_object_has_active_reference(obj)) {
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i915_gem_object_clear_active_reference(obj);
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i915_gem_object_put(obj);
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}
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}
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static struct i915_vma *
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2017-01-16 23:21:30 +08:00
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vma_create(struct drm_i915_gem_object *obj,
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struct i915_address_space *vm,
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const struct i915_ggtt_view *view)
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2016-11-11 18:43:54 +08:00
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{
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struct i915_vma *vma;
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struct rb_node *rb, **p;
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2017-02-09 19:19:33 +08:00
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/* The aliasing_ppgtt should never be used directly! */
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2018-06-05 23:37:58 +08:00
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GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->vm);
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2017-02-09 19:19:33 +08:00
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2017-01-20 03:26:56 +08:00
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vma = kmem_cache_zalloc(vm->i915->vmas, GFP_KERNEL);
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2016-11-11 18:43:54 +08:00
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if (vma == NULL)
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return ERR_PTR(-ENOMEM);
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2019-02-05 21:00:02 +08:00
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i915_active_init(vm->i915, &vma->active, __i915_vma_retire);
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drm/i915: Pull i915_gem_active into the i915_active family
Looking forward, we need to break the struct_mutex dependency on
i915_gem_active. In the meantime, external use of i915_gem_active is
quite beguiling, little do new users suspect that it implies a barrier
as each request it tracks must be ordered wrt the previous one. As one
of many, it can be used to track activity across multiple timelines, a
shared fence, which fits our unordered request submission much better. We
need to steer external users away from the singular, exclusive fence
imposed by i915_gem_active to i915_active instead. As part of that
process, we move i915_gem_active out of i915_request.c into
i915_active.c to start separating the two concepts, and rename it to
i915_active_request (both to tie it to the concept of tracking just one
request, and to give it a longer, less appealing name).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190205130005.2807-5-chris@chris-wilson.co.uk
2019-02-05 21:00:05 +08:00
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INIT_ACTIVE_REQUEST(&vma->last_fence);
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2019-02-05 21:00:02 +08:00
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2016-11-11 18:43:54 +08:00
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vma->vm = vm;
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2018-06-07 23:40:46 +08:00
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vma->ops = &vm->vma_ops;
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2016-11-11 18:43:54 +08:00
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vma->obj = obj;
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2017-06-16 22:05:25 +08:00
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vma->resv = obj->resv;
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2016-11-11 18:43:54 +08:00
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vma->size = obj->base.size;
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2017-01-10 22:47:34 +08:00
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vma->display_alignment = I915_GTT_MIN_ALIGNMENT;
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2016-11-11 18:43:54 +08:00
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drm/i915: Pevent copying uninitialised garbage into vma->ggtt_view
Since tweaking i915_vma_compare() we allowed constructors to skip
clearing the ggtt_view believing that we didn't access the unused
members. That, as it turns out, was not entirely true. In particular,
i915_gem_fault() uses
ret = remap_io_mapping(area,
area->vm_start + (vma->ggtt_view.partial.offset << PAGE_SHIFT),
(ggtt->mappable_base + vma->node.start) >> PAGE_SHIFT,
min_t(u64, vma->size, area->vm_end - area->vm_start),
&ggtt->mappable);
i.e. the ggtt_view.partial for both normal and partial views. If we
allowed garbage into the normal vma->ggtt_view and then try userspace
tried to mmap it, we could explode in an unobvious fashion.
Fixes: 7b92c047bae2 ("drm/i915: Eliminate superfluous i915_ggtt_view_rotated")
Fixes: 3bf4d5751943 ("drm/i915: Stop clearing i915_ggtt_view")
Reported-by: Matthew Auld <matthew.william.auld@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170123145245.3972-1-chris@chris-wilson.co.uk
Tested-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
2017-01-23 22:52:45 +08:00
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if (view && view->type != I915_GGTT_VIEW_NORMAL) {
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2016-11-11 18:43:54 +08:00
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vma->ggtt_view = *view;
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if (view->type == I915_GGTT_VIEW_PARTIAL) {
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2016-12-23 22:57:59 +08:00
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GEM_BUG_ON(range_overflows_t(u64,
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2017-01-14 08:28:25 +08:00
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view->partial.offset,
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view->partial.size,
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2016-12-23 22:57:59 +08:00
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obj->base.size >> PAGE_SHIFT));
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2017-01-14 08:28:25 +08:00
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vma->size = view->partial.size;
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2016-11-11 18:43:54 +08:00
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vma->size <<= PAGE_SHIFT;
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2018-06-30 17:05:09 +08:00
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GEM_BUG_ON(vma->size > obj->base.size);
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2016-11-11 18:43:54 +08:00
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} else if (view->type == I915_GGTT_VIEW_ROTATED) {
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2017-01-14 08:28:25 +08:00
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vma->size = intel_rotation_info_size(&view->rotated);
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2016-11-11 18:43:54 +08:00
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vma->size <<= PAGE_SHIFT;
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}
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}
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2017-01-20 03:26:56 +08:00
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if (unlikely(vma->size > vm->total))
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goto err_vma;
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2017-01-20 03:26:59 +08:00
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GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE));
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2016-11-11 18:43:54 +08:00
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if (i915_is_ggtt(vm)) {
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2017-01-20 03:26:56 +08:00
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if (unlikely(overflows_type(vma->size, u32)))
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goto err_vma;
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2017-01-10 00:16:13 +08:00
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vma->fence_size = i915_gem_fence_size(vm->i915, vma->size,
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i915_gem_object_get_tiling(obj),
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i915_gem_object_get_stride(obj));
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2017-01-20 03:26:56 +08:00
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if (unlikely(vma->fence_size < vma->size || /* overflow */
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vma->fence_size > vm->total))
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goto err_vma;
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2017-01-10 22:47:34 +08:00
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GEM_BUG_ON(!IS_ALIGNED(vma->fence_size, I915_GTT_MIN_ALIGNMENT));
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2017-01-10 00:16:11 +08:00
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2017-01-10 00:16:13 +08:00
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vma->fence_alignment = i915_gem_fence_alignment(vm->i915, vma->size,
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i915_gem_object_get_tiling(obj),
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i915_gem_object_get_stride(obj));
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2017-01-10 00:16:11 +08:00
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GEM_BUG_ON(!is_power_of_2(vma->fence_alignment));
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2016-11-11 18:43:54 +08:00
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vma->flags |= I915_VMA_GGTT;
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}
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2019-01-28 18:23:54 +08:00
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spin_lock(&obj->vma.lock);
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2016-11-11 18:43:54 +08:00
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rb = NULL;
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2019-01-28 18:23:54 +08:00
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p = &obj->vma.tree.rb_node;
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2016-11-11 18:43:54 +08:00
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while (*p) {
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struct i915_vma *pos;
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2019-01-28 18:23:54 +08:00
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long cmp;
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2016-11-11 18:43:54 +08:00
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rb = *p;
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pos = rb_entry(rb, struct i915_vma, obj_node);
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2019-01-28 18:23:54 +08:00
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/*
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* If the view already exists in the tree, another thread
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* already created a matching vma, so return the older instance
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* and dispose of ours.
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*/
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cmp = i915_vma_compare(pos, vm, view);
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if (cmp == 0) {
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spin_unlock(&obj->vma.lock);
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kmem_cache_free(vm->i915->vmas, vma);
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return pos;
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}
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if (cmp < 0)
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2016-11-11 18:43:54 +08:00
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p = &rb->rb_right;
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else
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p = &rb->rb_left;
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}
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rb_link_node(&vma->obj_node, rb, p);
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2019-01-28 18:23:54 +08:00
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rb_insert_color(&vma->obj_node, &obj->vma.tree);
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if (i915_vma_is_ggtt(vma))
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/*
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* We put the GGTT vma at the start of the vma-list, followed
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* by the ppGGTT vma. This allows us to break early when
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* iterating over only the GGTT vma for an object, see
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* for_each_ggtt_vma()
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*/
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list_add(&vma->obj_link, &obj->vma.list);
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else
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list_add_tail(&vma->obj_link, &obj->vma.list);
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spin_unlock(&obj->vma.lock);
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2019-01-28 18:23:53 +08:00
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mutex_lock(&vm->mutex);
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2017-01-20 03:26:56 +08:00
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list_add(&vma->vm_link, &vm->unbound_list);
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2019-01-28 18:23:53 +08:00
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mutex_unlock(&vm->mutex);
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2016-11-11 18:43:54 +08:00
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return vma;
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2017-01-20 03:26:56 +08:00
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err_vma:
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kmem_cache_free(vm->i915->vmas, vma);
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return ERR_PTR(-E2BIG);
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2016-11-11 18:43:54 +08:00
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}
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2017-01-16 23:21:31 +08:00
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static struct i915_vma *
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vma_lookup(struct drm_i915_gem_object *obj,
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struct i915_address_space *vm,
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const struct i915_ggtt_view *view)
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2017-01-16 23:21:28 +08:00
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{
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struct rb_node *rb;
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2019-01-28 18:23:54 +08:00
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rb = obj->vma.tree.rb_node;
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2017-01-16 23:21:28 +08:00
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while (rb) {
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struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node);
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long cmp;
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cmp = i915_vma_compare(vma, vm, view);
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if (cmp == 0)
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return vma;
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if (cmp < 0)
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rb = rb->rb_right;
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else
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rb = rb->rb_left;
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}
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return NULL;
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}
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/**
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* i915_vma_instance - return the singleton instance of the VMA
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* @obj: parent &struct drm_i915_gem_object to be mapped
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* @vm: address space in which the mapping is located
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* @view: additional mapping requirements
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*
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* i915_vma_instance() looks up an existing VMA of the @obj in the @vm with
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* the same @view characteristics. If a match is not found, one is created.
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* Once created, the VMA is kept until either the object is freed, or the
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* address space is closed.
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*
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* Must be called with struct_mutex held.
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*
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* Returns the vma, or an error pointer.
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*/
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struct i915_vma *
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i915_vma_instance(struct drm_i915_gem_object *obj,
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struct i915_address_space *vm,
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|
|
const struct i915_ggtt_view *view)
|
|
|
|
{
|
|
|
|
struct i915_vma *vma;
|
|
|
|
|
|
|
|
GEM_BUG_ON(view && !i915_is_ggtt(vm));
|
|
|
|
GEM_BUG_ON(vm->closed);
|
|
|
|
|
2019-01-28 18:23:54 +08:00
|
|
|
spin_lock(&obj->vma.lock);
|
2017-01-16 23:21:31 +08:00
|
|
|
vma = vma_lookup(obj, vm, view);
|
2019-01-28 18:23:54 +08:00
|
|
|
spin_unlock(&obj->vma.lock);
|
|
|
|
|
|
|
|
/* vma_create() will resolve the race if another creates the vma */
|
|
|
|
if (unlikely(!vma))
|
2017-01-16 23:21:30 +08:00
|
|
|
vma = vma_create(obj, vm, view);
|
2017-01-16 23:21:28 +08:00
|
|
|
|
2017-01-16 23:21:29 +08:00
|
|
|
GEM_BUG_ON(!IS_ERR(vma) && i915_vma_compare(vma, vm, view));
|
2017-01-16 23:21:28 +08:00
|
|
|
return vma;
|
|
|
|
}
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
/**
|
|
|
|
* i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.
|
|
|
|
* @vma: VMA to map
|
|
|
|
* @cache_level: mapping cache level
|
|
|
|
* @flags: flags like global or local mapping
|
|
|
|
*
|
|
|
|
* DMA addresses are taken from the scatter-gather table of this object (or of
|
|
|
|
* this VMA in case of non-default GGTT views) and PTE entries set up.
|
|
|
|
* Note that DMA addresses are also the only part of the SG table we care about.
|
|
|
|
*/
|
|
|
|
int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
|
|
|
|
u32 flags)
|
|
|
|
{
|
|
|
|
u32 bind_flags;
|
|
|
|
u32 vma_flags;
|
|
|
|
int ret;
|
|
|
|
|
2017-02-26 02:11:21 +08:00
|
|
|
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
|
|
|
|
GEM_BUG_ON(vma->size > vma->node.size);
|
|
|
|
|
2018-10-12 14:31:42 +08:00
|
|
|
if (GEM_DEBUG_WARN_ON(range_overflows(vma->node.start,
|
|
|
|
vma->node.size,
|
|
|
|
vma->vm->total)))
|
2017-02-26 02:11:21 +08:00
|
|
|
return -ENODEV;
|
|
|
|
|
2018-10-12 14:31:42 +08:00
|
|
|
if (GEM_DEBUG_WARN_ON(!flags))
|
2016-11-11 18:43:54 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
bind_flags = 0;
|
|
|
|
if (flags & PIN_GLOBAL)
|
|
|
|
bind_flags |= I915_VMA_GLOBAL_BIND;
|
|
|
|
if (flags & PIN_USER)
|
|
|
|
bind_flags |= I915_VMA_LOCAL_BIND;
|
|
|
|
|
|
|
|
vma_flags = vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
|
|
|
|
if (flags & PIN_UPDATE)
|
|
|
|
bind_flags |= vma_flags;
|
|
|
|
else
|
|
|
|
bind_flags &= ~vma_flags;
|
|
|
|
if (bind_flags == 0)
|
|
|
|
return 0;
|
|
|
|
|
2017-10-07 06:18:19 +08:00
|
|
|
GEM_BUG_ON(!vma->pages);
|
|
|
|
|
2017-01-21 05:51:23 +08:00
|
|
|
trace_i915_vma_bind(vma, bind_flags);
|
2018-06-07 23:40:46 +08:00
|
|
|
ret = vma->ops->bind_vma(vma, cache_level, bind_flags);
|
2016-11-11 18:43:54 +08:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
vma->flags |= bind_flags;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
void __iomem *ptr;
|
2017-10-09 16:43:55 +08:00
|
|
|
int err;
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
/* Access through the GTT requires the device to be awake. */
|
2016-11-29 17:50:08 +08:00
|
|
|
assert_rpm_wakelock_held(vma->vm->i915);
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2016-11-29 17:50:08 +08:00
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
2017-10-09 16:43:55 +08:00
|
|
|
if (WARN_ON(!i915_vma_is_map_and_fenceable(vma))) {
|
|
|
|
err = -ENODEV;
|
|
|
|
goto err;
|
|
|
|
}
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
GEM_BUG_ON(!i915_vma_is_ggtt(vma));
|
|
|
|
GEM_BUG_ON((vma->flags & I915_VMA_GLOBAL_BIND) == 0);
|
|
|
|
|
|
|
|
ptr = vma->iomap;
|
|
|
|
if (ptr == NULL) {
|
2017-12-11 23:18:20 +08:00
|
|
|
ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap,
|
2016-11-11 18:43:54 +08:00
|
|
|
vma->node.start,
|
|
|
|
vma->node.size);
|
2017-10-09 16:43:55 +08:00
|
|
|
if (ptr == NULL) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto err;
|
|
|
|
}
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
vma->iomap = ptr;
|
|
|
|
}
|
|
|
|
|
|
|
|
__i915_vma_pin(vma);
|
2017-10-09 16:43:55 +08:00
|
|
|
|
2017-10-09 16:43:56 +08:00
|
|
|
err = i915_vma_pin_fence(vma);
|
2017-10-09 16:43:55 +08:00
|
|
|
if (err)
|
|
|
|
goto err_unpin;
|
|
|
|
|
2017-12-06 20:49:14 +08:00
|
|
|
i915_vma_set_ggtt_write(vma);
|
2016-11-11 18:43:54 +08:00
|
|
|
return ptr;
|
2017-10-09 16:43:55 +08:00
|
|
|
|
|
|
|
err_unpin:
|
|
|
|
__i915_vma_unpin(vma);
|
|
|
|
err:
|
|
|
|
return IO_ERR_PTR(err);
|
|
|
|
}
|
|
|
|
|
2017-12-06 20:49:14 +08:00
|
|
|
void i915_vma_flush_writes(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
if (!i915_vma_has_ggtt_write(vma))
|
|
|
|
return;
|
|
|
|
|
|
|
|
i915_gem_flush_ggtt_writes(vma->vm->i915);
|
|
|
|
|
|
|
|
i915_vma_unset_ggtt_write(vma);
|
|
|
|
}
|
|
|
|
|
2017-10-09 16:43:55 +08:00
|
|
|
void i915_vma_unpin_iomap(struct i915_vma *vma)
|
|
|
|
{
|
2018-06-07 23:40:45 +08:00
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
2017-10-09 16:43:55 +08:00
|
|
|
|
|
|
|
GEM_BUG_ON(vma->iomap == NULL);
|
|
|
|
|
2017-12-06 20:49:14 +08:00
|
|
|
i915_vma_flush_writes(vma);
|
|
|
|
|
2017-10-09 16:43:55 +08:00
|
|
|
i915_vma_unpin_fence(vma);
|
|
|
|
i915_vma_unpin(vma);
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
|
|
|
|
2018-07-21 20:50:37 +08:00
|
|
|
void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags)
|
2016-11-11 18:43:54 +08:00
|
|
|
{
|
|
|
|
struct i915_vma *vma;
|
|
|
|
struct drm_i915_gem_object *obj;
|
|
|
|
|
|
|
|
vma = fetch_and_zero(p_vma);
|
|
|
|
if (!vma)
|
|
|
|
return;
|
|
|
|
|
|
|
|
obj = vma->obj;
|
2018-06-07 23:40:45 +08:00
|
|
|
GEM_BUG_ON(!obj);
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
i915_vma_unpin(vma);
|
|
|
|
i915_vma_close(vma);
|
|
|
|
|
2018-07-21 20:50:37 +08:00
|
|
|
if (flags & I915_VMA_RELEASE_MAP)
|
|
|
|
i915_gem_object_unpin_map(obj);
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
__i915_gem_object_release_unless_active(obj);
|
|
|
|
}
|
|
|
|
|
2017-02-14 01:15:46 +08:00
|
|
|
bool i915_vma_misplaced(const struct i915_vma *vma,
|
|
|
|
u64 size, u64 alignment, u64 flags)
|
2016-11-11 18:43:54 +08:00
|
|
|
{
|
|
|
|
if (!drm_mm_node_allocated(&vma->node))
|
|
|
|
return false;
|
|
|
|
|
|
|
|
if (vma->node.size < size)
|
|
|
|
return true;
|
|
|
|
|
2017-01-10 22:47:34 +08:00
|
|
|
GEM_BUG_ON(alignment && !is_power_of_2(alignment));
|
|
|
|
if (alignment && !IS_ALIGNED(vma->node.start, alignment))
|
2016-11-11 18:43:54 +08:00
|
|
|
return true;
|
|
|
|
|
|
|
|
if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma))
|
|
|
|
return true;
|
|
|
|
|
|
|
|
if (flags & PIN_OFFSET_BIAS &&
|
|
|
|
vma->node.start < (flags & PIN_OFFSET_MASK))
|
|
|
|
return true;
|
|
|
|
|
|
|
|
if (flags & PIN_OFFSET_FIXED &&
|
|
|
|
vma->node.start != (flags & PIN_OFFSET_MASK))
|
|
|
|
return true;
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
bool mappable, fenceable;
|
|
|
|
|
2017-01-10 00:16:11 +08:00
|
|
|
GEM_BUG_ON(!i915_vma_is_ggtt(vma));
|
|
|
|
GEM_BUG_ON(!vma->fence_size);
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Explicitly disable for rotated VMA since the display does not
|
|
|
|
* need the fence and the VMA is not accessible to other users.
|
|
|
|
*/
|
2017-01-10 00:16:11 +08:00
|
|
|
if (vma->ggtt_view.type == I915_GGTT_VIEW_ROTATED)
|
|
|
|
return;
|
|
|
|
|
|
|
|
fenceable = (vma->node.size >= vma->fence_size &&
|
2017-01-10 22:47:34 +08:00
|
|
|
IS_ALIGNED(vma->node.start, vma->fence_alignment));
|
2017-01-10 00:16:11 +08:00
|
|
|
|
|
|
|
mappable = vma->node.start + vma->fence_size <= i915_vm_to_ggtt(vma->vm)->mappable_end;
|
|
|
|
|
|
|
|
if (mappable && fenceable)
|
2016-11-11 18:43:54 +08:00
|
|
|
vma->flags |= I915_VMA_CAN_FENCE;
|
|
|
|
else
|
|
|
|
vma->flags &= ~I915_VMA_CAN_FENCE;
|
|
|
|
}
|
|
|
|
|
2016-12-05 22:29:38 +08:00
|
|
|
static bool color_differs(struct drm_mm_node *node, unsigned long color)
|
2016-11-11 18:43:54 +08:00
|
|
|
{
|
2016-12-05 22:29:38 +08:00
|
|
|
return node->allocated && node->color != color;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level)
|
|
|
|
{
|
|
|
|
struct drm_mm_node *node = &vma->node;
|
2016-11-11 18:43:54 +08:00
|
|
|
struct drm_mm_node *other;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* On some machines we have to be careful when putting differing types
|
|
|
|
* of snoopable memory together to avoid the prefetcher crossing memory
|
|
|
|
* domains and dying. During vm initialisation, we decide whether or not
|
|
|
|
* these constraints apply and set the drm_mm.color_adjust
|
|
|
|
* appropriately.
|
|
|
|
*/
|
|
|
|
if (vma->vm->mm.color_adjust == NULL)
|
|
|
|
return true;
|
|
|
|
|
2016-12-05 22:29:38 +08:00
|
|
|
/* Only valid to be called on an already inserted vma */
|
|
|
|
GEM_BUG_ON(!drm_mm_node_allocated(node));
|
|
|
|
GEM_BUG_ON(list_empty(&node->node_list));
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2016-12-05 22:29:38 +08:00
|
|
|
other = list_prev_entry(node, node_list);
|
2017-01-04 18:41:10 +08:00
|
|
|
if (color_differs(other, cache_level) && !drm_mm_hole_follows(other))
|
2016-11-11 18:43:54 +08:00
|
|
|
return false;
|
|
|
|
|
2016-12-05 22:29:38 +08:00
|
|
|
other = list_next_entry(node, node_list);
|
2017-01-04 18:41:10 +08:00
|
|
|
if (color_differs(other, cache_level) && !drm_mm_hole_follows(node))
|
2016-11-11 18:43:54 +08:00
|
|
|
return false;
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2018-06-05 17:41:07 +08:00
|
|
|
static void assert_bind_count(const struct drm_i915_gem_object *obj)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Combine the assertion that the object is bound and that we have
|
|
|
|
* pinned its pages. But we should never have bound the object
|
|
|
|
* more than we have pinned its pages. (For complete accuracy, we
|
|
|
|
* assume that no else is pinning the pages, but as a rough assertion
|
|
|
|
* that we will not run into problems later, this will do!)
|
|
|
|
*/
|
|
|
|
GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);
|
|
|
|
}
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
/**
|
|
|
|
* i915_vma_insert - finds a slot for the vma in its address space
|
|
|
|
* @vma: the vma
|
|
|
|
* @size: requested size in bytes (can be larger than the VMA)
|
|
|
|
* @alignment: required alignment
|
|
|
|
* @flags: mask of PIN_* flags to use
|
|
|
|
*
|
|
|
|
* First we try to allocate some free space that meets the requirements for
|
|
|
|
* the VMA. Failiing that, if the flags permit, it will evict an old VMA,
|
|
|
|
* preferrably the oldest idle entry to make room for the new VMA.
|
|
|
|
*
|
|
|
|
* Returns:
|
|
|
|
* 0 on success, negative error code otherwise.
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
|
|
|
|
{
|
2016-11-29 17:50:08 +08:00
|
|
|
struct drm_i915_private *dev_priv = vma->vm->i915;
|
2018-06-07 23:40:45 +08:00
|
|
|
unsigned int cache_level;
|
2016-11-11 18:43:54 +08:00
|
|
|
u64 start, end;
|
|
|
|
int ret;
|
|
|
|
|
2017-12-06 20:49:13 +08:00
|
|
|
GEM_BUG_ON(i915_vma_is_closed(vma));
|
2016-11-11 18:43:54 +08:00
|
|
|
GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
|
|
|
|
GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
|
|
|
|
|
|
|
|
size = max(size, vma->size);
|
2017-01-10 00:16:11 +08:00
|
|
|
alignment = max(alignment, vma->display_alignment);
|
|
|
|
if (flags & PIN_MAPPABLE) {
|
|
|
|
size = max_t(typeof(size), size, vma->fence_size);
|
|
|
|
alignment = max_t(typeof(alignment),
|
|
|
|
alignment, vma->fence_alignment);
|
|
|
|
}
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2017-01-10 22:47:34 +08:00
|
|
|
GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
|
|
|
|
GEM_BUG_ON(!IS_ALIGNED(alignment, I915_GTT_MIN_ALIGNMENT));
|
|
|
|
GEM_BUG_ON(!is_power_of_2(alignment));
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
|
2017-01-10 22:47:34 +08:00
|
|
|
GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE));
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
end = vma->vm->total;
|
|
|
|
if (flags & PIN_MAPPABLE)
|
|
|
|
end = min_t(u64, end, dev_priv->ggtt.mappable_end);
|
|
|
|
if (flags & PIN_ZONE_4G)
|
2017-01-10 22:47:34 +08:00
|
|
|
end = min_t(u64, end, (1ULL << 32) - I915_GTT_PAGE_SIZE);
|
|
|
|
GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE));
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
/* If binding the object/GGTT view requires more space than the entire
|
|
|
|
* aperture has, reject it early before evicting everything in a vain
|
|
|
|
* attempt to find space.
|
|
|
|
*/
|
|
|
|
if (size > end) {
|
2018-06-07 23:40:45 +08:00
|
|
|
DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu > %s aperture=%llu\n",
|
|
|
|
size, flags & PIN_MAPPABLE ? "mappable" : "total",
|
2016-11-11 18:43:54 +08:00
|
|
|
end);
|
drm/i915: Eliminate lots of iterations over the execobjects array
The major scaling bottleneck in execbuffer is the processing of the
execobjects. Creating an auxiliary list is inefficient when compared to
using the execobject array we already have allocated.
Reservation is then split into phases. As we lookup up the VMA, we
try and bind it back into active location. Only if that fails, do we add
it to the unbound list for phase 2. In phase 2, we try and add all those
objects that could not fit into their previous location, with fallback
to retrying all objects and evicting the VM in case of severe
fragmentation. (This is the same as before, except that phase 1 is now
done inline with looking up the VMA to avoid an iteration over the
execobject array. In the ideal case, we eliminate the separate reservation
phase). During the reservation phase, we only evict from the VM between
passes (rather than currently as we try to fit every new VMA). In
testing with Unreal Engine's Atlantis demo which stresses the eviction
logic on gen7 class hardware, this speed up the framerate by a factor of
2.
The second loop amalgamation is between move_to_gpu and move_to_active.
As we always submit the request, even if incomplete, we can use the
current request to track active VMA as we perform the flushes and
synchronisation required.
The next big advancement is to avoid copying back to the user any
execobjects and relocations that are not changed.
v2: Add a Theory of Operation spiel.
v3: Fall back to slow relocations in preparation for flushing userptrs.
v4: Document struct members, factor out eb_validate_vma(), add a few
more comments to explain some magic and hide other magic behind macros.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2017-06-16 22:05:19 +08:00
|
|
|
return -ENOSPC;
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
if (vma->obj) {
|
|
|
|
ret = i915_gem_object_pin_pages(vma->obj);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
cache_level = vma->obj->cache_level;
|
|
|
|
} else {
|
|
|
|
cache_level = 0;
|
|
|
|
}
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2017-10-07 06:18:19 +08:00
|
|
|
GEM_BUG_ON(vma->pages);
|
|
|
|
|
2018-06-07 23:40:46 +08:00
|
|
|
ret = vma->ops->set_pages(vma);
|
2017-10-07 06:18:19 +08:00
|
|
|
if (ret)
|
|
|
|
goto err_unpin;
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
if (flags & PIN_OFFSET_FIXED) {
|
|
|
|
u64 offset = flags & PIN_OFFSET_MASK;
|
2017-01-10 22:47:34 +08:00
|
|
|
if (!IS_ALIGNED(offset, alignment) ||
|
2017-01-06 23:20:12 +08:00
|
|
|
range_overflows(offset, size, end)) {
|
2016-11-11 18:43:54 +08:00
|
|
|
ret = -EINVAL;
|
2017-10-07 06:18:19 +08:00
|
|
|
goto err_clear;
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
|
|
|
|
2017-01-11 19:23:11 +08:00
|
|
|
ret = i915_gem_gtt_reserve(vma->vm, &vma->node,
|
2018-06-07 23:40:45 +08:00
|
|
|
size, offset, cache_level,
|
2017-01-11 19:23:11 +08:00
|
|
|
flags);
|
|
|
|
if (ret)
|
2017-10-07 06:18:19 +08:00
|
|
|
goto err_clear;
|
2016-11-11 18:43:54 +08:00
|
|
|
} else {
|
2017-10-07 06:18:20 +08:00
|
|
|
/*
|
|
|
|
* We only support huge gtt pages through the 48b PPGTT,
|
|
|
|
* however we also don't want to force any alignment for
|
|
|
|
* objects which need to be tightly packed into the low 32bits.
|
|
|
|
*
|
|
|
|
* Note that we assume that GGTT are limited to 4GiB for the
|
|
|
|
* forseeable future. See also i915_ggtt_offset().
|
|
|
|
*/
|
|
|
|
if (upper_32_bits(end - 1) &&
|
|
|
|
vma->page_sizes.sg > I915_GTT_PAGE_SIZE) {
|
2017-10-07 06:18:21 +08:00
|
|
|
/*
|
|
|
|
* We can't mix 64K and 4K PTEs in the same page-table
|
|
|
|
* (2M block), and so to avoid the ugliness and
|
|
|
|
* complexity of coloring we opt for just aligning 64K
|
|
|
|
* objects to 2M.
|
|
|
|
*/
|
2017-10-07 06:18:20 +08:00
|
|
|
u64 page_alignment =
|
2017-10-07 06:18:21 +08:00
|
|
|
rounddown_pow_of_two(vma->page_sizes.sg |
|
|
|
|
I915_GTT_PAGE_SIZE_2M);
|
2017-10-07 06:18:20 +08:00
|
|
|
|
2017-10-09 17:20:19 +08:00
|
|
|
/*
|
|
|
|
* Check we don't expand for the limited Global GTT
|
|
|
|
* (mappable aperture is even more precious!). This
|
|
|
|
* also checks that we exclude the aliasing-ppgtt.
|
|
|
|
*/
|
|
|
|
GEM_BUG_ON(i915_vma_is_ggtt(vma));
|
|
|
|
|
2017-10-07 06:18:20 +08:00
|
|
|
alignment = max(alignment, page_alignment);
|
2017-10-07 06:18:21 +08:00
|
|
|
|
|
|
|
if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K)
|
|
|
|
size = round_up(size, I915_GTT_PAGE_SIZE_2M);
|
2017-10-07 06:18:20 +08:00
|
|
|
}
|
|
|
|
|
2017-01-11 19:23:10 +08:00
|
|
|
ret = i915_gem_gtt_insert(vma->vm, &vma->node,
|
2018-06-07 23:40:45 +08:00
|
|
|
size, alignment, cache_level,
|
2017-01-11 19:23:10 +08:00
|
|
|
start, end, flags);
|
|
|
|
if (ret)
|
2017-10-07 06:18:19 +08:00
|
|
|
goto err_clear;
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
GEM_BUG_ON(vma->node.start < start);
|
|
|
|
GEM_BUG_ON(vma->node.start + vma->node.size > end);
|
|
|
|
}
|
2017-01-20 03:26:58 +08:00
|
|
|
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
|
2018-06-07 23:40:45 +08:00
|
|
|
GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, cache_level));
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2019-01-28 18:23:53 +08:00
|
|
|
mutex_lock(&vma->vm->mutex);
|
2019-01-28 18:23:52 +08:00
|
|
|
list_move_tail(&vma->vm_link, &vma->vm->bound_list);
|
2019-01-28 18:23:53 +08:00
|
|
|
mutex_unlock(&vma->vm->mutex);
|
2017-10-16 19:40:37 +08:00
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
if (vma->obj) {
|
|
|
|
struct drm_i915_gem_object *obj = vma->obj;
|
|
|
|
|
|
|
|
spin_lock(&dev_priv->mm.obj_lock);
|
|
|
|
list_move_tail(&obj->mm.link, &dev_priv->mm.bound_list);
|
|
|
|
obj->bind_count++;
|
|
|
|
spin_unlock(&dev_priv->mm.obj_lock);
|
2017-10-16 19:40:37 +08:00
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
assert_bind_count(obj);
|
|
|
|
}
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
2017-10-07 06:18:19 +08:00
|
|
|
err_clear:
|
2018-06-07 23:40:46 +08:00
|
|
|
vma->ops->clear_pages(vma);
|
2016-11-11 18:43:54 +08:00
|
|
|
err_unpin:
|
2018-06-07 23:40:45 +08:00
|
|
|
if (vma->obj)
|
|
|
|
i915_gem_object_unpin_pages(vma->obj);
|
2016-11-11 18:43:54 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2017-02-27 20:26:54 +08:00
|
|
|
static void
|
|
|
|
i915_vma_remove(struct i915_vma *vma)
|
|
|
|
{
|
2017-10-16 19:40:37 +08:00
|
|
|
struct drm_i915_private *i915 = vma->vm->i915;
|
2017-02-27 20:26:54 +08:00
|
|
|
|
|
|
|
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
|
|
|
|
GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
|
|
|
|
|
2018-06-07 23:40:46 +08:00
|
|
|
vma->ops->clear_pages(vma);
|
2017-10-07 06:18:19 +08:00
|
|
|
|
2019-01-28 18:23:53 +08:00
|
|
|
mutex_lock(&vma->vm->mutex);
|
2017-02-27 20:26:54 +08:00
|
|
|
drm_mm_remove_node(&vma->node);
|
|
|
|
list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
|
2019-01-28 18:23:53 +08:00
|
|
|
mutex_unlock(&vma->vm->mutex);
|
2017-02-27 20:26:54 +08:00
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
/*
|
|
|
|
* Since the unbound list is global, only move to that list if
|
2017-02-27 20:26:54 +08:00
|
|
|
* no more VMAs exist.
|
|
|
|
*/
|
2018-06-07 23:40:45 +08:00
|
|
|
if (vma->obj) {
|
|
|
|
struct drm_i915_gem_object *obj = vma->obj;
|
|
|
|
|
|
|
|
spin_lock(&i915->mm.obj_lock);
|
|
|
|
if (--obj->bind_count == 0)
|
|
|
|
list_move_tail(&obj->mm.link, &i915->mm.unbound_list);
|
|
|
|
spin_unlock(&i915->mm.obj_lock);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* And finally now the object is completely decoupled from this
|
|
|
|
* vma, we can drop its hold on the backing storage and allow
|
|
|
|
* it to be reaped by the shrinker.
|
|
|
|
*/
|
|
|
|
i915_gem_object_unpin_pages(obj);
|
|
|
|
assert_bind_count(obj);
|
|
|
|
}
|
2017-02-27 20:26:54 +08:00
|
|
|
}
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
int __i915_vma_do_pin(struct i915_vma *vma,
|
|
|
|
u64 size, u64 alignment, u64 flags)
|
|
|
|
{
|
2017-02-27 20:26:54 +08:00
|
|
|
const unsigned int bound = vma->flags;
|
2016-11-11 18:43:54 +08:00
|
|
|
int ret;
|
|
|
|
|
2016-11-29 17:50:08 +08:00
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
2016-11-11 18:43:54 +08:00
|
|
|
GEM_BUG_ON((flags & (PIN_GLOBAL | PIN_USER)) == 0);
|
|
|
|
GEM_BUG_ON((flags & PIN_GLOBAL) && !i915_vma_is_ggtt(vma));
|
|
|
|
|
|
|
|
if (WARN_ON(bound & I915_VMA_PIN_OVERFLOW)) {
|
|
|
|
ret = -EBUSY;
|
2017-02-27 20:26:54 +08:00
|
|
|
goto err_unpin;
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
if ((bound & I915_VMA_BIND_MASK) == 0) {
|
|
|
|
ret = i915_vma_insert(vma, size, alignment, flags);
|
|
|
|
if (ret)
|
2017-02-27 20:26:54 +08:00
|
|
|
goto err_unpin;
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
2017-11-05 20:45:50 +08:00
|
|
|
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
ret = i915_vma_bind(vma, vma->obj ? vma->obj->cache_level : 0, flags);
|
2016-11-11 18:43:54 +08:00
|
|
|
if (ret)
|
2017-02-27 20:26:54 +08:00
|
|
|
goto err_remove;
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2017-11-05 20:45:50 +08:00
|
|
|
GEM_BUG_ON((vma->flags & I915_VMA_BIND_MASK) == 0);
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
if ((bound ^ vma->flags) & I915_VMA_GLOBAL_BIND)
|
|
|
|
__i915_vma_set_map_and_fenceable(vma);
|
|
|
|
|
|
|
|
GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
|
|
|
|
return 0;
|
|
|
|
|
2017-02-27 20:26:54 +08:00
|
|
|
err_remove:
|
|
|
|
if ((bound & I915_VMA_BIND_MASK) == 0) {
|
|
|
|
i915_vma_remove(vma);
|
2017-10-07 06:18:19 +08:00
|
|
|
GEM_BUG_ON(vma->pages);
|
2017-11-05 20:45:50 +08:00
|
|
|
GEM_BUG_ON(vma->flags & I915_VMA_BIND_MASK);
|
2017-02-27 20:26:54 +08:00
|
|
|
}
|
|
|
|
err_unpin:
|
2016-11-11 18:43:54 +08:00
|
|
|
__i915_vma_unpin(vma);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2018-05-04 03:51:14 +08:00
|
|
|
void i915_vma_close(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
|
|
|
|
|
|
|
GEM_BUG_ON(i915_vma_is_closed(vma));
|
|
|
|
vma->flags |= I915_VMA_CLOSED;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We defer actually closing, unbinding and destroying the VMA until
|
|
|
|
* the next idle point, or if the object is freed in the meantime. By
|
|
|
|
* postponing the unbind, we allow for it to be resurrected by the
|
|
|
|
* client, avoiding the work required to rebind the VMA. This is
|
|
|
|
* advantageous for DRI, where the client/server pass objects
|
|
|
|
* between themselves, temporarily opening a local VMA to the
|
|
|
|
* object, and then closing it again. The same object is then reused
|
|
|
|
* on the next frame (or two, depending on the depth of the swap queue)
|
|
|
|
* causing us to rebind the VMA once more. This ends up being a lot
|
|
|
|
* of wasted work for the steady state.
|
|
|
|
*/
|
|
|
|
list_add_tail(&vma->closed_link, &vma->vm->i915->gt.closed_vma);
|
|
|
|
}
|
|
|
|
|
|
|
|
void i915_vma_reopen(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
|
|
|
|
|
|
|
if (vma->flags & I915_VMA_CLOSED) {
|
|
|
|
vma->flags &= ~I915_VMA_CLOSED;
|
|
|
|
list_del(&vma->closed_link);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __i915_vma_destroy(struct i915_vma *vma)
|
2016-11-11 18:43:54 +08:00
|
|
|
{
|
2018-06-07 23:40:45 +08:00
|
|
|
struct drm_i915_private *i915 = vma->vm->i915;
|
2017-06-20 20:43:21 +08:00
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
GEM_BUG_ON(vma->node.allocated);
|
|
|
|
GEM_BUG_ON(vma->fence);
|
|
|
|
|
drm/i915: Pull i915_gem_active into the i915_active family
Looking forward, we need to break the struct_mutex dependency on
i915_gem_active. In the meantime, external use of i915_gem_active is
quite beguiling, little do new users suspect that it implies a barrier
as each request it tracks must be ordered wrt the previous one. As one
of many, it can be used to track activity across multiple timelines, a
shared fence, which fits our unordered request submission much better. We
need to steer external users away from the singular, exclusive fence
imposed by i915_gem_active to i915_active instead. As part of that
process, we move i915_gem_active out of i915_request.c into
i915_active.c to start separating the two concepts, and rename it to
i915_active_request (both to tie it to the concept of tracking just one
request, and to give it a longer, less appealing name).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190205130005.2807-5-chris@chris-wilson.co.uk
2019-02-05 21:00:05 +08:00
|
|
|
GEM_BUG_ON(i915_active_request_isset(&vma->last_fence));
|
2017-06-20 20:43:21 +08:00
|
|
|
|
2019-01-28 18:23:53 +08:00
|
|
|
mutex_lock(&vma->vm->mutex);
|
2016-11-11 18:43:54 +08:00
|
|
|
list_del(&vma->vm_link);
|
2019-01-28 18:23:53 +08:00
|
|
|
mutex_unlock(&vma->vm->mutex);
|
|
|
|
|
2019-01-28 18:23:54 +08:00
|
|
|
if (vma->obj) {
|
|
|
|
struct drm_i915_gem_object *obj = vma->obj;
|
|
|
|
|
|
|
|
spin_lock(&obj->vma.lock);
|
|
|
|
list_del(&vma->obj_link);
|
|
|
|
rb_erase(&vma->obj_node, &vma->obj->vma.tree);
|
|
|
|
spin_unlock(&obj->vma.lock);
|
|
|
|
}
|
2017-12-06 20:49:13 +08:00
|
|
|
|
2019-02-05 21:00:02 +08:00
|
|
|
i915_active_fini(&vma->active);
|
2018-07-06 18:39:46 +08:00
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
kmem_cache_free(i915->vmas, vma);
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
|
|
|
|
2018-05-04 03:51:14 +08:00
|
|
|
void i915_vma_destroy(struct i915_vma *vma)
|
2016-11-11 18:43:54 +08:00
|
|
|
{
|
2018-05-04 03:51:14 +08:00
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2018-05-04 03:51:14 +08:00
|
|
|
GEM_BUG_ON(i915_vma_is_active(vma));
|
|
|
|
GEM_BUG_ON(i915_vma_is_pinned(vma));
|
|
|
|
|
|
|
|
if (i915_vma_is_closed(vma))
|
|
|
|
list_del(&vma->closed_link);
|
|
|
|
|
|
|
|
WARN_ON(i915_vma_unbind(vma));
|
|
|
|
__i915_vma_destroy(vma);
|
|
|
|
}
|
|
|
|
|
|
|
|
void i915_vma_parked(struct drm_i915_private *i915)
|
|
|
|
{
|
|
|
|
struct i915_vma *vma, *next;
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2018-05-04 03:51:14 +08:00
|
|
|
list_for_each_entry_safe(vma, next, &i915->gt.closed_vma, closed_link) {
|
|
|
|
GEM_BUG_ON(!i915_vma_is_closed(vma));
|
|
|
|
i915_vma_destroy(vma);
|
|
|
|
}
|
|
|
|
|
|
|
|
GEM_BUG_ON(!list_empty(&i915->gt.closed_vma));
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __i915_vma_iounmap(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
GEM_BUG_ON(i915_vma_is_pinned(vma));
|
|
|
|
|
|
|
|
if (vma->iomap == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
io_mapping_unmap(vma->iomap);
|
|
|
|
vma->iomap = NULL;
|
|
|
|
}
|
|
|
|
|
2017-10-09 16:43:57 +08:00
|
|
|
void i915_vma_revoke_mmap(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
struct drm_vma_offset_node *node = &vma->obj->base.vma_node;
|
|
|
|
u64 vma_offset;
|
|
|
|
|
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
|
|
|
|
|
|
|
if (!i915_vma_has_userfault(vma))
|
|
|
|
return;
|
|
|
|
|
|
|
|
GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma));
|
|
|
|
GEM_BUG_ON(!vma->obj->userfault_count);
|
|
|
|
|
|
|
|
vma_offset = vma->ggtt_view.partial.offset << PAGE_SHIFT;
|
|
|
|
unmap_mapping_range(vma->vm->i915->drm.anon_inode->i_mapping,
|
|
|
|
drm_vma_node_offset_addr(node) + vma_offset,
|
|
|
|
vma->size,
|
|
|
|
1);
|
|
|
|
|
|
|
|
i915_vma_unset_userfault(vma);
|
|
|
|
if (!--vma->obj->userfault_count)
|
|
|
|
list_del(&vma->obj->userfault_link);
|
|
|
|
}
|
|
|
|
|
2018-07-06 18:39:45 +08:00
|
|
|
static void export_fence(struct i915_vma *vma,
|
|
|
|
struct i915_request *rq,
|
|
|
|
unsigned int flags)
|
|
|
|
{
|
|
|
|
struct reservation_object *resv = vma->resv;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Ignore errors from failing to allocate the new fence, we can't
|
|
|
|
* handle an error right now. Worst case should be missed
|
|
|
|
* synchronisation leading to rendering corruption.
|
|
|
|
*/
|
|
|
|
reservation_object_lock(resv, NULL);
|
|
|
|
if (flags & EXEC_OBJECT_WRITE)
|
|
|
|
reservation_object_add_excl_fence(resv, &rq->fence);
|
2018-09-19 22:12:25 +08:00
|
|
|
else if (reservation_object_reserve_shared(resv, 1) == 0)
|
2018-07-06 18:39:45 +08:00
|
|
|
reservation_object_add_shared_fence(resv, &rq->fence);
|
|
|
|
reservation_object_unlock(resv);
|
|
|
|
}
|
|
|
|
|
|
|
|
int i915_vma_move_to_active(struct i915_vma *vma,
|
|
|
|
struct i915_request *rq,
|
|
|
|
unsigned int flags)
|
|
|
|
{
|
|
|
|
struct drm_i915_gem_object *obj = vma->obj;
|
|
|
|
|
|
|
|
lockdep_assert_held(&rq->i915->drm.struct_mutex);
|
|
|
|
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a reference if we're newly entering the active list.
|
|
|
|
* The order in which we add operations to the retirement queue is
|
|
|
|
* vital here: mark_active adds to the start of the callback list,
|
|
|
|
* such that subsequent callbacks are called first. Therefore we
|
|
|
|
* add the active reference first and queue for it to be dropped
|
|
|
|
* *last*.
|
|
|
|
*/
|
2019-02-05 21:00:02 +08:00
|
|
|
if (!vma->active.count)
|
2018-07-06 18:39:45 +08:00
|
|
|
obj->active_count++;
|
2019-02-05 21:00:02 +08:00
|
|
|
|
|
|
|
if (unlikely(i915_active_ref(&vma->active, rq->fence.context, rq))) {
|
|
|
|
if (!vma->active.count)
|
|
|
|
obj->active_count--;
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2018-07-06 18:39:46 +08:00
|
|
|
GEM_BUG_ON(!i915_vma_is_active(vma));
|
|
|
|
GEM_BUG_ON(!obj->active_count);
|
2018-07-06 18:39:45 +08:00
|
|
|
|
|
|
|
obj->write_domain = 0;
|
|
|
|
if (flags & EXEC_OBJECT_WRITE) {
|
|
|
|
obj->write_domain = I915_GEM_DOMAIN_RENDER;
|
|
|
|
|
|
|
|
if (intel_fb_obj_invalidate(obj, ORIGIN_CS))
|
drm/i915: Pull i915_gem_active into the i915_active family
Looking forward, we need to break the struct_mutex dependency on
i915_gem_active. In the meantime, external use of i915_gem_active is
quite beguiling, little do new users suspect that it implies a barrier
as each request it tracks must be ordered wrt the previous one. As one
of many, it can be used to track activity across multiple timelines, a
shared fence, which fits our unordered request submission much better. We
need to steer external users away from the singular, exclusive fence
imposed by i915_gem_active to i915_active instead. As part of that
process, we move i915_gem_active out of i915_request.c into
i915_active.c to start separating the two concepts, and rename it to
i915_active_request (both to tie it to the concept of tracking just one
request, and to give it a longer, less appealing name).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190205130005.2807-5-chris@chris-wilson.co.uk
2019-02-05 21:00:05 +08:00
|
|
|
__i915_active_request_set(&obj->frontbuffer_write, rq);
|
2018-07-06 18:39:45 +08:00
|
|
|
|
|
|
|
obj->read_domains = 0;
|
|
|
|
}
|
|
|
|
obj->read_domains |= I915_GEM_GPU_DOMAINS;
|
|
|
|
|
|
|
|
if (flags & EXEC_OBJECT_NEEDS_FENCE)
|
drm/i915: Pull i915_gem_active into the i915_active family
Looking forward, we need to break the struct_mutex dependency on
i915_gem_active. In the meantime, external use of i915_gem_active is
quite beguiling, little do new users suspect that it implies a barrier
as each request it tracks must be ordered wrt the previous one. As one
of many, it can be used to track activity across multiple timelines, a
shared fence, which fits our unordered request submission much better. We
need to steer external users away from the singular, exclusive fence
imposed by i915_gem_active to i915_active instead. As part of that
process, we move i915_gem_active out of i915_request.c into
i915_active.c to start separating the two concepts, and rename it to
i915_active_request (both to tie it to the concept of tracking just one
request, and to give it a longer, less appealing name).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190205130005.2807-5-chris@chris-wilson.co.uk
2019-02-05 21:00:05 +08:00
|
|
|
__i915_active_request_set(&vma->last_fence, rq);
|
2018-07-06 18:39:45 +08:00
|
|
|
|
|
|
|
export_fence(vma, rq, flags);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
int i915_vma_unbind(struct i915_vma *vma)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2018-06-07 23:40:45 +08:00
|
|
|
/*
|
|
|
|
* First wait upon any activity as retiring the request may
|
2016-11-11 18:43:54 +08:00
|
|
|
* have side-effects such as unpinning or even unbinding this vma.
|
|
|
|
*/
|
2017-11-10 05:34:50 +08:00
|
|
|
might_sleep();
|
2018-07-06 18:39:46 +08:00
|
|
|
if (i915_vma_is_active(vma)) {
|
2018-06-07 23:40:45 +08:00
|
|
|
/*
|
|
|
|
* When a closed VMA is retired, it is unbound - eek.
|
2016-11-11 18:43:54 +08:00
|
|
|
* In order to prevent it from being recursively closed,
|
|
|
|
* take a pin on the vma so that the second unbind is
|
|
|
|
* aborted.
|
|
|
|
*
|
|
|
|
* Even more scary is that the retire callback may free
|
|
|
|
* the object (last active vma). To prevent the explosion
|
|
|
|
* we defer the actual object free to a worker that can
|
|
|
|
* only proceed once it acquires the struct_mutex (which
|
|
|
|
* we currently hold, therefore it cannot free this object
|
|
|
|
* before we are finished).
|
|
|
|
*/
|
|
|
|
__i915_vma_pin(vma);
|
|
|
|
|
2019-02-05 21:00:02 +08:00
|
|
|
ret = i915_active_wait(&vma->active);
|
2018-07-06 20:31:57 +08:00
|
|
|
if (ret)
|
|
|
|
goto unpin;
|
|
|
|
|
drm/i915: Pull i915_gem_active into the i915_active family
Looking forward, we need to break the struct_mutex dependency on
i915_gem_active. In the meantime, external use of i915_gem_active is
quite beguiling, little do new users suspect that it implies a barrier
as each request it tracks must be ordered wrt the previous one. As one
of many, it can be used to track activity across multiple timelines, a
shared fence, which fits our unordered request submission much better. We
need to steer external users away from the singular, exclusive fence
imposed by i915_gem_active to i915_active instead. As part of that
process, we move i915_gem_active out of i915_request.c into
i915_active.c to start separating the two concepts, and rename it to
i915_active_request (both to tie it to the concept of tracking just one
request, and to give it a longer, less appealing name).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190205130005.2807-5-chris@chris-wilson.co.uk
2019-02-05 21:00:05 +08:00
|
|
|
ret = i915_active_request_retire(&vma->last_fence,
|
|
|
|
&vma->vm->i915->drm.struct_mutex);
|
2018-07-06 18:39:46 +08:00
|
|
|
unpin:
|
2016-11-11 18:43:54 +08:00
|
|
|
__i915_vma_unpin(vma);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
}
|
2017-06-20 20:43:21 +08:00
|
|
|
GEM_BUG_ON(i915_vma_is_active(vma));
|
2016-11-11 18:43:54 +08:00
|
|
|
|
2018-06-28 21:22:06 +08:00
|
|
|
if (i915_vma_is_pinned(vma)) {
|
|
|
|
vma_print_allocator(vma, "is pinned");
|
2016-11-11 18:43:54 +08:00
|
|
|
return -EBUSY;
|
2018-06-28 21:22:06 +08:00
|
|
|
}
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
if (!drm_mm_node_allocated(&vma->node))
|
2018-05-04 03:51:14 +08:00
|
|
|
return 0;
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
if (i915_vma_is_map_and_fenceable(vma)) {
|
2017-12-06 20:49:14 +08:00
|
|
|
/*
|
|
|
|
* Check that we have flushed all writes through the GGTT
|
|
|
|
* before the unbind, other due to non-strict nature of those
|
|
|
|
* indirect writes they may end up referencing the GGTT PTE
|
|
|
|
* after the unbind.
|
|
|
|
*/
|
|
|
|
i915_vma_flush_writes(vma);
|
|
|
|
GEM_BUG_ON(i915_vma_has_ggtt_write(vma));
|
|
|
|
|
2016-11-11 18:43:54 +08:00
|
|
|
/* release the fence reg _after_ flushing */
|
|
|
|
ret = i915_vma_put_fence(vma);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
/* Force a pagefault for domain tracking on next user access */
|
2017-10-09 16:43:57 +08:00
|
|
|
i915_vma_revoke_mmap(vma);
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
__i915_vma_iounmap(vma);
|
|
|
|
vma->flags &= ~I915_VMA_CAN_FENCE;
|
|
|
|
}
|
2017-10-09 16:43:57 +08:00
|
|
|
GEM_BUG_ON(vma->fence);
|
|
|
|
GEM_BUG_ON(i915_vma_has_userfault(vma));
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
if (likely(!vma->vm->closed)) {
|
|
|
|
trace_i915_vma_unbind(vma);
|
2018-06-07 23:40:46 +08:00
|
|
|
vma->ops->unbind_vma(vma);
|
2016-11-11 18:43:54 +08:00
|
|
|
}
|
|
|
|
vma->flags &= ~(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
|
|
|
|
|
2017-02-27 20:26:54 +08:00
|
|
|
i915_vma_remove(vma);
|
2016-11-11 18:43:54 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-02-14 01:15:45 +08:00
|
|
|
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
|
|
|
|
#include "selftests/i915_vma.c"
|
|
|
|
#endif
|