diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.c | 138 |
1 files changed, 104 insertions, 34 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c index 3cedb8d5c855..7daf4054dd2b 100644 --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -21,6 +21,7 @@ #include <linux/pfn_t.h> #include "msm_drv.h" +#include "msm_fence.h" #include "msm_gem.h" #include "msm_gpu.h" #include "msm_mmu.h" @@ -373,7 +374,7 @@ int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, int ret = 0; /* GEM does all our handle to object mapping */ - obj = drm_gem_object_lookup(dev, file, handle); + obj = drm_gem_object_lookup(file, handle); if (obj == NULL) { ret = -ENOENT; goto fail; @@ -410,27 +411,62 @@ void *msm_gem_vaddr(struct drm_gem_object *obj) return ret; } -/* setup callback for when bo is no longer busy.. - * TODO probably want to differentiate read vs write.. - */ -int msm_gem_queue_inactive_cb(struct drm_gem_object *obj, - struct msm_fence_cb *cb) +/* must be called before _move_to_active().. */ +int msm_gem_sync_object(struct drm_gem_object *obj, + struct msm_fence_context *fctx, bool exclusive) { struct msm_gem_object *msm_obj = to_msm_bo(obj); - uint32_t fence = msm_gem_fence(msm_obj, - MSM_PREP_READ | MSM_PREP_WRITE); - return msm_queue_fence_cb(obj->dev, cb, fence); + struct reservation_object_list *fobj; + struct fence *fence; + int i, ret; + + if (!exclusive) { + /* NOTE: _reserve_shared() must happen before _add_shared_fence(), + * which makes this a slightly strange place to call it. OTOH this + * is a convenient can-fail point to hook it in. (And similar to + * how etnaviv and nouveau handle this.) + */ + ret = reservation_object_reserve_shared(msm_obj->resv); + if (ret) + return ret; + } + + fobj = reservation_object_get_list(msm_obj->resv); + if (!fobj || (fobj->shared_count == 0)) { + fence = reservation_object_get_excl(msm_obj->resv); + /* don't need to wait on our own fences, since ring is fifo */ + if (fence && (fence->context != fctx->context)) { + ret = fence_wait(fence, true); + if (ret) + return ret; + } + } + + if (!exclusive || !fobj) + return 0; + + for (i = 0; i < fobj->shared_count; i++) { + fence = rcu_dereference_protected(fobj->shared[i], + reservation_object_held(msm_obj->resv)); + if (fence->context != fctx->context) { + ret = fence_wait(fence, true); + if (ret) + return ret; + } + } + + return 0; } void msm_gem_move_to_active(struct drm_gem_object *obj, - struct msm_gpu *gpu, bool write, uint32_t fence) + struct msm_gpu *gpu, bool exclusive, struct fence *fence) { struct msm_gem_object *msm_obj = to_msm_bo(obj); msm_obj->gpu = gpu; - if (write) - msm_obj->write_fence = fence; + if (exclusive) + reservation_object_add_excl_fence(msm_obj->resv, fence); else - msm_obj->read_fence = fence; + reservation_object_add_shared_fence(msm_obj->resv, fence); list_del_init(&msm_obj->mm_list); list_add_tail(&msm_obj->mm_list, &gpu->active_list); } @@ -444,30 +480,30 @@ void msm_gem_move_to_inactive(struct drm_gem_object *obj) WARN_ON(!mutex_is_locked(&dev->struct_mutex)); msm_obj->gpu = NULL; - msm_obj->read_fence = 0; - msm_obj->write_fence = 0; list_del_init(&msm_obj->mm_list); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); } int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) { - struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); - int ret = 0; + bool write = !!(op & MSM_PREP_WRITE); - if (is_active(msm_obj)) { - uint32_t fence = msm_gem_fence(msm_obj, op); - - if (op & MSM_PREP_NOSYNC) - timeout = NULL; + if (op & MSM_PREP_NOSYNC) { + if (!reservation_object_test_signaled_rcu(msm_obj->resv, write)) + return -EBUSY; + } else { + int ret; - ret = msm_wait_fence(dev, fence, timeout, true); + ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, + true, timeout_to_jiffies(timeout)); + if (ret <= 0) + return ret == 0 ? -ETIMEDOUT : ret; } /* TODO cache maintenance */ - return ret; + return 0; } int msm_gem_cpu_fini(struct drm_gem_object *obj) @@ -477,18 +513,46 @@ int msm_gem_cpu_fini(struct drm_gem_object *obj) } #ifdef CONFIG_DEBUG_FS +static void describe_fence(struct fence *fence, const char *type, + struct seq_file *m) +{ + if (!fence_is_signaled(fence)) + seq_printf(m, "\t%9s: %s %s seq %u\n", type, + fence->ops->get_driver_name(fence), + fence->ops->get_timeline_name(fence), + fence->seqno); +} + void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) { - struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); + struct reservation_object *robj = msm_obj->resv; + struct reservation_object_list *fobj; + struct fence *fence; uint64_t off = drm_vma_node_start(&obj->vma_node); - WARN_ON(!mutex_is_locked(&dev->struct_mutex)); - seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %zu\n", + WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); + + seq_printf(m, "%08x: %c %2d (%2d) %08llx %p %zu\n", msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', - msm_obj->read_fence, msm_obj->write_fence, obj->name, obj->refcount.refcount.counter, off, msm_obj->vaddr, obj->size); + + rcu_read_lock(); + fobj = rcu_dereference(robj->fence); + if (fobj) { + unsigned int i, shared_count = fobj->shared_count; + + for (i = 0; i < shared_count; i++) { + fence = rcu_dereference(fobj->shared[i]); + describe_fence(fence, "Shared", m); + } + } + + fence = rcu_dereference(robj->fence_excl); + if (fence) + describe_fence(fence, "Exclusive", m); + rcu_read_unlock(); } void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) @@ -583,6 +647,7 @@ int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, static int msm_gem_new_impl(struct drm_device *dev, uint32_t size, uint32_t flags, + struct reservation_object *resv, struct drm_gem_object **obj) { struct msm_drm_private *priv = dev->dev_private; @@ -622,8 +687,12 @@ static int msm_gem_new_impl(struct drm_device *dev, msm_obj->flags = flags; - msm_obj->resv = &msm_obj->_resv; - reservation_object_init(msm_obj->resv); + if (resv) { + msm_obj->resv = resv; + } else { + msm_obj->resv = &msm_obj->_resv; + reservation_object_init(msm_obj->resv); + } INIT_LIST_HEAD(&msm_obj->submit_entry); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); @@ -643,7 +712,7 @@ struct drm_gem_object *msm_gem_new(struct drm_device *dev, size = PAGE_ALIGN(size); - ret = msm_gem_new_impl(dev, size, flags, &obj); + ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); if (ret) goto fail; @@ -665,10 +734,11 @@ fail: } struct drm_gem_object *msm_gem_import(struct drm_device *dev, - uint32_t size, struct sg_table *sgt) + struct dma_buf *dmabuf, struct sg_table *sgt) { struct msm_gem_object *msm_obj; struct drm_gem_object *obj; + uint32_t size; int ret, npages; /* if we don't have IOMMU, don't bother pretending we can import: */ @@ -677,9 +747,9 @@ struct drm_gem_object *msm_gem_import(struct drm_device *dev, return ERR_PTR(-EINVAL); } - size = PAGE_ALIGN(size); + size = PAGE_ALIGN(dmabuf->size); - ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); + ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); if (ret) goto fail; |
