From 55fb74adc628b99424360b0123f47ea4484c56fd Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Wed, 2 Oct 2013 10:15:17 +0200 Subject: drm/nouveau: embed gem object in nouveau_bo There is no reason to keep the gem object separately allocated. nouveau is the last user of gem_obj->driver_private, so if we embed it, we can get rid of 8bytes per gem-object. The implementation follows the radeon driver. bo->gem is only valid, iff the bo was created via the gem helpers _and_ iff the user holds a valid gem reference. That is, as the gem object holds a reference to the nouveau_bo. If you use nouveau_ref() to gain a bo reference, you are not guaranteed to also hold a gem reference. The gem object might get destroyed after the last user drops the gem-ref via drm_gem_object_unreference(). Use drm_gem_object_reference() to gain a gem-reference. For debugging, we can use bo->gem.filp != NULL to test whether a gem-bo is valid. However, this shouldn't be used for real functionality to avoid gem-internal dependencies. Note that the implementation follows the previous style. However, we no longer can check for bo->gem != NULL to test for a valid gem object. This wasn't done before, so we should be safe now. Signed-off-by: David Herrmann Acked-by: Maarten Lankhorst Reviewed-by: Ben Skeggs Signed-off-by: Dave Airlie --- drivers/gpu/drm/nouveau/nouveau_gem.c | 36 +++++++++++++++++------------------ 1 file changed, 17 insertions(+), 19 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_gem.c') diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index f32b71238c03..6618318abf50 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -43,20 +43,17 @@ nouveau_gem_object_new(struct drm_gem_object *gem) void nouveau_gem_object_del(struct drm_gem_object *gem) { - struct nouveau_bo *nvbo = gem->driver_private; + struct nouveau_bo *nvbo = nouveau_gem_object(gem); struct ttm_buffer_object *bo = &nvbo->bo; - if (!nvbo) - return; - nvbo->gem = NULL; - if (gem->import_attach) drm_prime_gem_destroy(gem, nvbo->bo.sg); - ttm_bo_unref(&bo); - drm_gem_object_release(gem); - kfree(gem); + + /* reset filp so nouveau_bo_del_ttm() can test for it */ + gem->filp = NULL; + ttm_bo_unref(&bo); } int @@ -186,14 +183,15 @@ nouveau_gem_new(struct drm_device *dev, int size, int align, uint32_t domain, if (nv_device(drm->device)->card_type >= NV_50) nvbo->valid_domains &= domain; - nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size); - if (!nvbo->gem) { + /* Initialize the embedded gem-object. We return a single gem-reference + * to the caller, instead of a normal nouveau_bo ttm reference. */ + ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size); + if (ret) { nouveau_bo_ref(NULL, pnvbo); return -ENOMEM; } - nvbo->bo.persistent_swap_storage = nvbo->gem->filp; - nvbo->gem->driver_private = nvbo; + nvbo->bo.persistent_swap_storage = nvbo->gem.filp; return 0; } @@ -250,15 +248,15 @@ nouveau_gem_ioctl_new(struct drm_device *dev, void *data, if (ret) return ret; - ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle); + ret = drm_gem_handle_create(file_priv, &nvbo->gem, &req->info.handle); if (ret == 0) { - ret = nouveau_gem_info(file_priv, nvbo->gem, &req->info); + ret = nouveau_gem_info(file_priv, &nvbo->gem, &req->info); if (ret) drm_gem_handle_delete(file_priv, req->info.handle); } /* drop reference from allocate - handle holds it now */ - drm_gem_object_unreference_unlocked(nvbo->gem); + drm_gem_object_unreference_unlocked(&nvbo->gem); return ret; } @@ -266,7 +264,7 @@ static int nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains, uint32_t write_domains, uint32_t valid_domains) { - struct nouveau_bo *nvbo = gem->driver_private; + struct nouveau_bo *nvbo = nouveau_gem_object(gem); struct ttm_buffer_object *bo = &nvbo->bo; uint32_t domains = valid_domains & nvbo->valid_domains & (write_domains ? write_domains : read_domains); @@ -327,7 +325,7 @@ validate_fini_list(struct list_head *list, struct nouveau_fence *fence, list_del(&nvbo->entry); nvbo->reserved_by = NULL; ttm_bo_unreserve_ticket(&nvbo->bo, ticket); - drm_gem_object_unreference_unlocked(nvbo->gem); + drm_gem_object_unreference_unlocked(&nvbo->gem); } } @@ -376,7 +374,7 @@ retry: validate_fini(op, NULL); return -ENOENT; } - nvbo = gem->driver_private; + nvbo = nouveau_gem_object(gem); if (nvbo == res_bo) { res_bo = NULL; drm_gem_object_unreference_unlocked(gem); @@ -478,7 +476,7 @@ validate_list(struct nouveau_channel *chan, struct nouveau_cli *cli, return ret; } - ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains, + ret = nouveau_gem_set_domain(&nvbo->gem, b->read_domains, b->write_domains, b->valid_domains); if (unlikely(ret)) { -- cgit v1.2.1 From 16eb5f4379b2097438a224381be3b4d9e56ac979 Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Wed, 2 Oct 2013 10:15:18 +0200 Subject: drm: kill ->gem_init_object() and friends All drivers embed gem-objects into their own buffer objects. There is no reason to keep drm_gem_object_alloc(), gem->driver_private and ->gem_init_object() anymore. New drivers are highly encouraged to do the same. There is no benefit in allocating gem-objects separately. Cc: Dave Airlie Cc: Alex Deucher Cc: Daniel Vetter Cc: Jerome Glisse Cc: Rob Clark Cc: Inki Dae Cc: Ben Skeggs Cc: Patrik Jakobsson Signed-off-by: David Herrmann Acked-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/nouveau/nouveau_gem.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_gem.c') diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index 6618318abf50..418a6177a653 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -34,12 +34,6 @@ #include "nouveau_ttm.h" #include "nouveau_gem.h" -int -nouveau_gem_object_new(struct drm_gem_object *gem) -{ - return 0; -} - void nouveau_gem_object_del(struct drm_gem_object *gem) { -- cgit v1.2.1 From 5d216f6013d54a6085d5e499407aec6d67e79990 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Wed, 13 Nov 2013 10:23:46 +1000 Subject: drm/nouveau: allow nouveau_fence_ref() to be a noop Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_gem.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_gem.c') diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index 418a6177a653..c60f65a815d3 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -106,8 +106,7 @@ nouveau_gem_object_unmap(struct nouveau_bo *nvbo, struct nouveau_vma *vma) if (mapped) { spin_lock(&nvbo->bo.bdev->fence_lock); - if (nvbo->bo.sync_obj) - fence = nouveau_fence_ref(nvbo->bo.sync_obj); + fence = nouveau_fence_ref(nvbo->bo.sync_obj); spin_unlock(&nvbo->bo.bdev->fence_lock); } @@ -438,8 +437,7 @@ validate_sync(struct nouveau_channel *chan, struct nouveau_bo *nvbo) int ret = 0; spin_lock(&nvbo->bo.bdev->fence_lock); - if (nvbo->bo.sync_obj) - fence = nouveau_fence_ref(nvbo->bo.sync_obj); + fence = nouveau_fence_ref(nvbo->bo.sync_obj); spin_unlock(&nvbo->bo.bdev->fence_lock); if (fence) { -- cgit v1.2.1 From 9360bd1112d8874d21942e2ae74f5416b00a8db6 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Wed, 13 Nov 2013 15:18:32 +1000 Subject: drm/nouveau: when bailing out of a pushbuf ioctl, do not remove previous fence Cc: stable@vger.kernel.org Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_gem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_gem.c') diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index c60f65a815d3..78a27f8ad7d9 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -308,7 +308,8 @@ validate_fini_list(struct list_head *list, struct nouveau_fence *fence, list_for_each_safe(entry, tmp, list) { nvbo = list_entry(entry, struct nouveau_bo, entry); - nouveau_bo_fence(nvbo, fence); + if (likely(fence)) + nouveau_bo_fence(nvbo, fence); if (unlikely(nvbo->validate_mapped)) { ttm_bo_kunmap(&nvbo->kmap); -- cgit v1.2.1