On Thu, Jun 27, 2013 at 04:30:27PM -0700, Ben Widawsky wrote:
> for file in `ls drivers/gpu/drm/i915/*.c` ; do sed -i
> "s/dev_priv->mm.inactive_list/i915_gtt_mm-\>inactive_list/" $file; done
> for file in `ls drivers/gpu/drm/i915/*.c` ; do sed -i
> "s/dev_priv->mm.active_list/i915_gtt_mm-\>active_list/" $file; done
>
> I've also opted to move the comments out of line a bit so one can get a
> better picture of what the various lists do.
Bikeshed: That makes you now inconsistent with all the other in-detail
structure memeber comments we have. And I don't see how it looks better,
so I'd vote to keep things as-is with per-member comments.
> v2: Leave the bound list as a global one. (Chris, indirectly)
>
> CC: Chris Wilson <ch...@chris-wilson.co.uk>
> Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
The real comment though is on the commit message, it fails to explain why
we want to move the active/inactive lists from mm/obj to the address
space/vma pair. I think I understand, but this should be explained more
in-depth.
I think in the first commit which starts moving those lists and execution
tracking state you should also mention why some of the state
(bound/unbound lists e.g.) are not moved.
Cheers, Daniel
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 11 ++++----
> drivers/gpu/drm/i915/i915_drv.h | 49
> ++++++++++++++--------------------
> drivers/gpu/drm/i915/i915_gem.c | 24 +++++++----------
> drivers/gpu/drm/i915/i915_gem_debug.c | 2 +-
> drivers/gpu/drm/i915/i915_gem_evict.c | 10 +++----
> drivers/gpu/drm/i915/i915_gem_stolen.c | 2 +-
> drivers/gpu/drm/i915/i915_irq.c | 6 ++---
> 7 files changed, 46 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index f3c76ab..a0babc7 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -158,11 +158,11 @@ static int i915_gem_object_list_info(struct seq_file
> *m, void *data)
> switch (list) {
> case ACTIVE_LIST:
> seq_printf(m, "Active:\n");
> - head = &dev_priv->mm.active_list;
> + head = &i915_gtt_vm->active_list;
> break;
> case INACTIVE_LIST:
> seq_printf(m, "Inactive:\n");
> - head = &dev_priv->mm.inactive_list;
> + head = &i915_gtt_vm->inactive_list;
> break;
> default:
> mutex_unlock(&dev->struct_mutex);
> @@ -247,12 +247,12 @@ static int i915_gem_object_info(struct seq_file *m,
> void* data)
> count, mappable_count, size, mappable_size);
>
> size = count = mappable_size = mappable_count = 0;
> - count_objects(&dev_priv->mm.active_list, mm_list);
> + count_objects(&i915_gtt_vm->active_list, mm_list);
> seq_printf(m, " %u [%u] active objects, %zu [%zu] bytes\n",
> count, mappable_count, size, mappable_size);
>
> size = count = mappable_size = mappable_count = 0;
> - count_objects(&dev_priv->mm.inactive_list, mm_list);
> + count_objects(&i915_gtt_vm->inactive_list, mm_list);
> seq_printf(m, " %u [%u] inactive objects, %zu [%zu] bytes\n",
> count, mappable_count, size, mappable_size);
>
> @@ -1977,7 +1977,8 @@ i915_drop_caches_set(void *data, u64 val)
> i915_gem_retire_requests(dev);
>
> if (val & DROP_BOUND) {
> - list_for_each_entry_safe(obj, next,
> &dev_priv->mm.inactive_list, mm_list)
> + list_for_each_entry_safe(obj, next, &i915_gtt_vm->inactive_list,
> + mm_list)
> if (obj->pin_count == 0) {
> ret = i915_gem_object_unbind(obj);
> if (ret)
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index e65cf57..0553410 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -448,6 +448,22 @@ struct i915_address_space {
> unsigned long start; /* Start offset always 0 for dri2 */
> size_t total; /* size addr space maps (ex. 2GB for ggtt) */
>
> +/* We use many types of lists for object tracking:
> + * active_list: List of objects currently involved in rendering.
> + * Includes buffers having the contents of their GPU caches flushed, not
> + * necessarily primitives. last_rendering_seqno represents when the
> + * rendering involved will be completed. A reference is held on the buffer
> + * while on this list.
> + * inactive_list: LRU list of objects which are not in the ringbuffer
> + * objects are ready to unbind but are still mapped.
> + * last_rendering_seqno is 0 while an object is in this list.
> + * A reference is not held on the buffer while on this list,
> + * as merely being GTT-bound shouldn't prevent its being
> + * freed, and we'll pull it off the list in the free path.
> + */
> + struct list_head active_list;
> + struct list_head inactive_list;
> +
> struct {
> dma_addr_t addr;
> struct page *page;
> @@ -835,42 +851,17 @@ struct intel_l3_parity {
> };
>
> struct i915_gem_mm {
> - /** List of all objects in gtt_space. Used to restore gtt
> - * mappings on resume */
> - struct list_head bound_list;
> /**
> - * List of objects which are not bound to the GTT (thus
> - * are idle and not used by the GPU) but still have
> - * (presumably uncached) pages still attached.
> + * Lists of objects which are [not] bound to a VM. Unbound objects are
> + * idle are idle but still have (presumably uncached) pages still
> + * attached.
> */
> + struct list_head bound_list;
> struct list_head unbound_list;
>
> struct shrinker inactive_shrinker;
> bool shrinker_no_lock_stealing;
>
> - /**
> - * List of objects currently involved in rendering.
> - *
> - * Includes buffers having the contents of their GPU caches
> - * flushed, not necessarily primitives. last_rendering_seqno
> - * represents when the rendering involved will be completed.
> - *
> - * A reference is held on the buffer while on this list.
> - */
> - struct list_head active_list;
> -
> - /**
> - * LRU list of objects which are not in the ringbuffer and
> - * are ready to unbind, but are still in the GTT.
> - *
> - * last_rendering_seqno is 0 while an object is in this list.
> - *
> - * A reference is not held on the buffer while on this list,
> - * as merely being GTT-bound shouldn't prevent its being
> - * freed, and we'll pull it off the list in the free path.
> - */
> - struct list_head inactive_list;
> -
> /** LRU list of objects with fence regs on them. */
> struct list_head fence_list;
>
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 608b6b5..7da06df 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -1706,7 +1706,7 @@ __i915_gem_shrink(struct drm_i915_private *dev_priv,
> long target,
> }
>
> list_for_each_entry_safe(obj, next,
> - &dev_priv->mm.inactive_list,
> + &i915_gtt_vm->inactive_list,
> mm_list) {
> if ((i915_gem_object_is_purgeable(obj) || !purgeable_only) &&
> i915_gem_object_unbind(obj) == 0 &&
> @@ -1881,7 +1881,7 @@ i915_gem_object_move_to_active(struct
> drm_i915_gem_object *obj,
> }
>
> /* Move from whatever list we were on to the tail of execution. */
> - list_move_tail(&obj->mm_list, &dev_priv->mm.active_list);
> + list_move_tail(&obj->mm_list, &i915_gtt_vm->active_list);
> list_move_tail(&obj->ring_list, &ring->active_list);
>
> obj->last_read_seqno = seqno;
> @@ -1909,7 +1909,7 @@ i915_gem_object_move_to_inactive(struct
> drm_i915_gem_object *obj)
> BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS);
> BUG_ON(!obj->active);
>
> - list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
> + list_move_tail(&obj->mm_list, &i915_gtt_vm->inactive_list);
>
> list_del_init(&obj->ring_list);
> obj->ring = NULL;
> @@ -2279,12 +2279,8 @@ bool i915_gem_reset(struct drm_device *dev)
> /* Move everything out of the GPU domains to ensure we do any
> * necessary invalidation upon reuse.
> */
> - list_for_each_entry(obj,
> - &dev_priv->mm.inactive_list,
> - mm_list)
> - {
> + list_for_each_entry(obj, &i915_gtt_vm->inactive_list, mm_list)
> obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS;
> - }
>
> /* The fence registers are invalidated so clear them out */
> i915_gem_restore_fences(dev);
> @@ -3162,7 +3158,7 @@ search_free:
> }
>
> list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
> - list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
> + list_add_tail(&obj->mm_list, &i915_gtt_vm->inactive_list);
>
> obj->gtt_space = node;
> obj->gtt_offset = node->start;
> @@ -3313,7 +3309,7 @@ i915_gem_object_set_to_gtt_domain(struct
> drm_i915_gem_object *obj, bool write)
>
> /* And bump the LRU for this access */
> if (i915_gem_object_is_inactive(obj))
> - list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
> + list_move_tail(&obj->mm_list, &i915_gtt_vm->inactive_list);
>
> return 0;
> }
> @@ -4291,7 +4287,7 @@ i915_gem_entervt_ioctl(struct drm_device *dev, void
> *data,
> return ret;
> }
>
> - BUG_ON(!list_empty(&dev_priv->mm.active_list));
> + BUG_ON(!list_empty(&i915_gtt_vm->active_list));
> mutex_unlock(&dev->struct_mutex);
>
> ret = drm_irq_install(dev);
> @@ -4352,8 +4348,8 @@ i915_gem_load(struct drm_device *dev)
> SLAB_HWCACHE_ALIGN,
> NULL);
>
> - INIT_LIST_HEAD(&dev_priv->mm.active_list);
> - INIT_LIST_HEAD(&dev_priv->mm.inactive_list);
> + INIT_LIST_HEAD(&i915_gtt_vm->active_list);
> + INIT_LIST_HEAD(&i915_gtt_vm->inactive_list);
> INIT_LIST_HEAD(&dev_priv->mm.unbound_list);
> INIT_LIST_HEAD(&dev_priv->mm.bound_list);
> INIT_LIST_HEAD(&dev_priv->mm.fence_list);
> @@ -4652,7 +4648,7 @@ i915_gem_inactive_shrink(struct shrinker *shrinker,
> struct shrink_control *sc)
> list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list)
> if (obj->pages_pin_count == 0)
> cnt += obj->base.size >> PAGE_SHIFT;
> - list_for_each_entry(obj, &dev_priv->mm.inactive_list, global_list)
> + list_for_each_entry(obj, &i915_gtt_vm->inactive_list, global_list)
> if (obj->pin_count == 0 && obj->pages_pin_count == 0)
> cnt += obj->base.size >> PAGE_SHIFT;
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_debug.c
> b/drivers/gpu/drm/i915/i915_gem_debug.c
> index 582e6a5..bf945a3 100644
> --- a/drivers/gpu/drm/i915/i915_gem_debug.c
> +++ b/drivers/gpu/drm/i915/i915_gem_debug.c
> @@ -97,7 +97,7 @@ i915_verify_lists(struct drm_device *dev)
> }
> }
>
> - list_for_each_entry(obj, &dev_priv->mm.inactive_list, list) {
> + list_for_each_entry(obj, &i915_gtt_vm->inactive_list, list) {
> if (obj->base.dev != dev ||
> !atomic_read(&obj->base.refcount.refcount)) {
> DRM_ERROR("freed inactive %p\n", obj);
> diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c
> b/drivers/gpu/drm/i915/i915_gem_evict.c
> index 6e620f86..92856a2 100644
> --- a/drivers/gpu/drm/i915/i915_gem_evict.c
> +++ b/drivers/gpu/drm/i915/i915_gem_evict.c
> @@ -86,7 +86,7 @@ i915_gem_evict_something(struct drm_device *dev, int
> min_size,
> cache_level);
>
> /* First see if there is a large enough contiguous idle region... */
> - list_for_each_entry(obj, &dev_priv->mm.inactive_list, mm_list) {
> + list_for_each_entry(obj, &i915_gtt_vm->inactive_list, mm_list) {
> if (mark_free(obj, &unwind_list))
> goto found;
> }
> @@ -95,7 +95,7 @@ i915_gem_evict_something(struct drm_device *dev, int
> min_size,
> goto none;
>
> /* Now merge in the soon-to-be-expired objects... */
> - list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
> + list_for_each_entry(obj, &i915_gtt_vm->active_list, mm_list) {
> if (mark_free(obj, &unwind_list))
> goto found;
> }
> @@ -158,8 +158,8 @@ i915_gem_evict_everything(struct drm_device *dev)
> bool lists_empty;
> int ret;
>
> - lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
> - list_empty(&dev_priv->mm.active_list));
> + lists_empty = (list_empty(&i915_gtt_vm->inactive_list) &&
> + list_empty(&i915_gtt_vm->active_list));
> if (lists_empty)
> return -ENOSPC;
>
> @@ -177,7 +177,7 @@ i915_gem_evict_everything(struct drm_device *dev)
>
> /* Having flushed everything, unbind() should never raise an error */
> list_for_each_entry_safe(obj, next,
> - &dev_priv->mm.inactive_list, mm_list)
> + &i915_gtt_vm->inactive_list, mm_list)
> if (obj->pin_count == 0)
> WARN_ON(i915_gem_object_unbind(obj));
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c
> b/drivers/gpu/drm/i915/i915_gem_stolen.c
> index 49e8be7..3f6564d 100644
> --- a/drivers/gpu/drm/i915/i915_gem_stolen.c
> +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
> @@ -384,7 +384,7 @@ i915_gem_object_create_stolen_for_preallocated(struct
> drm_device *dev,
> obj->has_global_gtt_mapping = 1;
>
> list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
> - list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
> + list_add_tail(&obj->mm_list, &i915_gtt_vm->inactive_list);
>
> return obj;
> }
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 1e25920..5dc055a 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -1722,7 +1722,7 @@ i915_error_first_batchbuffer(struct drm_i915_private
> *dev_priv,
> }
>
> seqno = ring->get_seqno(ring, false);
> - list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
> + list_for_each_entry(obj, &i915_gtt_vm->active_list, mm_list) {
> if (obj->ring != ring)
> continue;
>
> @@ -1857,7 +1857,7 @@ static void i915_gem_capture_buffers(struct
> drm_i915_private *dev_priv,
> int i;
>
> i = 0;
> - list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
> + list_for_each_entry(obj, &i915_gtt_vm->active_list, mm_list)
> i++;
> error->active_bo_count = i;
> list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
> @@ -1877,7 +1877,7 @@ static void i915_gem_capture_buffers(struct
> drm_i915_private *dev_priv,
> error->active_bo_count =
> capture_active_bo(error->active_bo,
> error->active_bo_count,
> - &dev_priv->mm.active_list);
> + &i915_gtt_vm->active_list);
>
> if (error->pinned_bo)
> error->pinned_bo_count =
> --
> 1.8.3.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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