diff options
Diffstat (limited to 'drivers/gpu/drm/drm_syncobj.c')
| -rw-r--r-- | drivers/gpu/drm/drm_syncobj.c | 582 |
1 files changed, 530 insertions, 52 deletions
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index e19525af0cce..669c93fe2500 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -29,38 +29,122 @@ /** * DOC: Overview * - * DRM synchronisation objects (syncobj, see struct &drm_syncobj) are - * persistent objects that contain an optional fence. The fence can be updated - * with a new fence, or be NULL. + * DRM synchronisation objects (syncobj, see struct &drm_syncobj) provide a + * container for a synchronization primitive which can be used by userspace + * to explicitly synchronize GPU commands, can be shared between userspace + * processes, and can be shared between different DRM drivers. + * Their primary use-case is to implement Vulkan fences and semaphores. + * The syncobj userspace API provides ioctls for several operations: * - * syncobj's can be waited upon, where it will wait for the underlying - * fence. + * - Creation and destruction of syncobjs + * - Import and export of syncobjs to/from a syncobj file descriptor + * - Import and export a syncobj's underlying fence to/from a sync file + * - Reset a syncobj (set its fence to NULL) + * - Signal a syncobj (set a trivially signaled fence) + * - Wait for a syncobj's fence to appear and be signaled * - * syncobj's can be export to fd's and back, these fd's are opaque and - * have no other use case, except passing the syncobj between processes. + * At it's core, a syncobj is simply a wrapper around a pointer to a struct + * &dma_fence which may be NULL. + * When a syncobj is first created, its pointer is either NULL or a pointer + * to an already signaled fence depending on whether the + * &DRM_SYNCOBJ_CREATE_SIGNALED flag is passed to + * &DRM_IOCTL_SYNCOBJ_CREATE. + * When GPU work which signals a syncobj is enqueued in a DRM driver, + * the syncobj fence is replaced with a fence which will be signaled by the + * completion of that work. + * When GPU work which waits on a syncobj is enqueued in a DRM driver, the + * driver retrieves syncobj's current fence at the time the work is enqueued + * waits on that fence before submitting the work to hardware. + * If the syncobj's fence is NULL, the enqueue operation is expected to fail. + * All manipulation of the syncobjs's fence happens in terms of the current + * fence at the time the ioctl is called by userspace regardless of whether + * that operation is an immediate host-side operation (signal or reset) or + * or an operation which is enqueued in some driver queue. + * &DRM_IOCTL_SYNCOBJ_RESET and &DRM_IOCTL_SYNCOBJ_SIGNAL can be used to + * manipulate a syncobj from the host by resetting its pointer to NULL or + * setting its pointer to a fence which is already signaled. * - * Their primary use-case is to implement Vulkan fences and semaphores. * - * syncobj have a kref reference count, but also have an optional file. - * The file is only created once the syncobj is exported. - * The file takes a reference on the kref. + * Host-side wait on syncobjs + * -------------------------- + * + * &DRM_IOCTL_SYNCOBJ_WAIT takes an array of syncobj handles and does a + * host-side wait on all of the syncobj fences simultaneously. + * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL is set, the wait ioctl will wait on + * all of the syncobj fences to be signaled before it returns. + * Otherwise, it returns once at least one syncobj fence has been signaled + * and the index of a signaled fence is written back to the client. + * + * Unlike the enqueued GPU work dependencies which fail if they see a NULL + * fence in a syncobj, if &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is set, + * the host-side wait will first wait for the syncobj to receive a non-NULL + * fence and then wait on that fence. + * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is not set and any one of the + * syncobjs in the array has a NULL fence, -EINVAL will be returned. + * Assuming the syncobj starts off with a NULL fence, this allows a client + * to do a host wait in one thread (or process) which waits on GPU work + * submitted in another thread (or process) without having to manually + * synchronize between the two. + * This requirement is inherited from the Vulkan fence API. + * + * + * Import/export of syncobjs + * ------------------------- + * + * &DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE and &DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD + * provide two mechanisms for import/export of syncobjs. + * + * The first lets the client import or export an entire syncobj to a file + * descriptor. + * These fd's are opaque and have no other use case, except passing the + * syncobj between processes. + * All exported file descriptors and any syncobj handles created as a + * result of importing those file descriptors own a reference to the + * same underlying struct &drm_syncobj and the syncobj can be used + * persistently across all the processes with which it is shared. + * The syncobj is freed only once the last reference is dropped. + * Unlike dma-buf, importing a syncobj creates a new handle (with its own + * reference) for every import instead of de-duplicating. + * The primary use-case of this persistent import/export is for shared + * Vulkan fences and semaphores. + * + * The second import/export mechanism, which is indicated by + * &DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE or + * &DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE lets the client + * import/export the syncobj's current fence from/to a &sync_file. + * When a syncobj is exported to a sync file, that sync file wraps the + * sycnobj's fence at the time of export and any later signal or reset + * operations on the syncobj will not affect the exported sync file. + * When a sync file is imported into a syncobj, the syncobj's fence is set + * to the fence wrapped by that sync file. + * Because sync files are immutable, resetting or signaling the syncobj + * will not affect any sync files whose fences have been imported into the + * syncobj. */ -#include <drm/drmP.h> +#include <linux/anon_inodes.h> #include <linux/file.h> #include <linux/fs.h> -#include <linux/anon_inodes.h> -#include <linux/sync_file.h> #include <linux/sched/signal.h> +#include <linux/sync_file.h> +#include <linux/uaccess.h> -#include "drm_internal.h" +#include <drm/drm.h> +#include <drm/drm_drv.h> +#include <drm/drm_file.h> +#include <drm/drm_gem.h> +#include <drm/drm_print.h> #include <drm/drm_syncobj.h> +#include <drm/drm_utils.h> + +#include "drm_internal.h" struct syncobj_wait_entry { struct list_head node; struct task_struct *task; struct dma_fence *fence; struct dma_fence_cb fence_cb; + u64 point; }; static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj, @@ -95,6 +179,8 @@ EXPORT_SYMBOL(drm_syncobj_find); static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj, struct syncobj_wait_entry *wait) { + struct dma_fence *fence; + if (wait->fence) return; @@ -103,11 +189,15 @@ static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj, * have the lock, try one more time just to be sure we don't add a * callback when a fence has already been set. */ - if (syncobj->fence) - wait->fence = dma_fence_get( - rcu_dereference_protected(syncobj->fence, 1)); - else + fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1)); + if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) { + dma_fence_put(fence); list_add_tail(&wait->node, &syncobj->cb_list); + } else if (!fence) { + wait->fence = dma_fence_get_stub(); + } else { + wait->fence = fence; + } spin_unlock(&syncobj->lock); } @@ -123,6 +213,44 @@ static void drm_syncobj_remove_wait(struct drm_syncobj *syncobj, } /** + * drm_syncobj_add_point - add new timeline point to the syncobj + * @syncobj: sync object to add timeline point do + * @chain: chain node to use to add the point + * @fence: fence to encapsulate in the chain node + * @point: sequence number to use for the point + * + * Add the chain node as new timeline point to the syncobj. + */ +void drm_syncobj_add_point(struct drm_syncobj *syncobj, + struct dma_fence_chain *chain, + struct dma_fence *fence, + uint64_t point) +{ + struct syncobj_wait_entry *cur, *tmp; + struct dma_fence *prev; + + dma_fence_get(fence); + + spin_lock(&syncobj->lock); + + prev = drm_syncobj_fence_get(syncobj); + /* You are adding an unorder point to timeline, which could cause payload returned from query_ioctl is 0! */ + if (prev && prev->seqno >= point) + DRM_ERROR("You are adding an unorder point to timeline!\n"); + dma_fence_chain_init(chain, prev, fence, point); + rcu_assign_pointer(syncobj->fence, &chain->base); + + list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) + syncobj_wait_syncobj_func(syncobj, cur); + spin_unlock(&syncobj->lock); + + /* Walk the chain once to trigger garbage collection */ + dma_fence_chain_for_each(fence, prev); + dma_fence_put(prev); +} +EXPORT_SYMBOL(drm_syncobj_add_point); + +/** * drm_syncobj_replace_fence - replace fence in a sync object. * @syncobj: Sync object to replace fence in * @fence: fence to install in sync file. @@ -145,10 +273,8 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj, rcu_assign_pointer(syncobj->fence, fence); if (fence != old_fence) { - list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) { - list_del_init(&cur->node); + list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) syncobj_wait_syncobj_func(syncobj, cur); - } } spin_unlock(&syncobj->lock); @@ -171,6 +297,8 @@ static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj) dma_fence_put(fence); } +/* 5s default for wait submission */ +#define DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT 5000000000ULL /** * drm_syncobj_find_fence - lookup and reference the fence in a sync object * @file_private: drm file private pointer @@ -191,16 +319,58 @@ int drm_syncobj_find_fence(struct drm_file *file_private, struct dma_fence **fence) { struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle); - int ret = 0; + struct syncobj_wait_entry wait; + u64 timeout = nsecs_to_jiffies64(DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT); + int ret; if (!syncobj) return -ENOENT; *fence = drm_syncobj_fence_get(syncobj); - if (!*fence) { + drm_syncobj_put(syncobj); + + if (*fence) { + ret = dma_fence_chain_find_seqno(fence, point); + if (!ret) + return 0; + dma_fence_put(*fence); + } else { ret = -EINVAL; } - drm_syncobj_put(syncobj); + + if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) + return ret; + + memset(&wait, 0, sizeof(wait)); + wait.task = current; + wait.point = point; + drm_syncobj_fence_add_wait(syncobj, &wait); + + do { + set_current_state(TASK_INTERRUPTIBLE); + if (wait.fence) { + ret = 0; + break; + } + if (timeout == 0) { + ret = -ETIME; + break; + } + + if (signal_pending(current)) { + ret = -ERESTARTSYS; + break; + } + + timeout = schedule_timeout(timeout); + } while (1); + + __set_current_state(TASK_RUNNING); + *fence = wait.fence; + + if (wait.node.next) + drm_syncobj_remove_wait(syncobj, &wait); + return ret; } EXPORT_SYMBOL(drm_syncobj_find_fence); @@ -388,20 +558,19 @@ static int drm_syncobj_fd_to_handle(struct drm_file *file_private, int fd, u32 *handle) { struct drm_syncobj *syncobj; - struct file *file; + struct fd f = fdget(fd); int ret; - file = fget(fd); - if (!file) + if (!f.file) return -EINVAL; - if (file->f_op != &drm_syncobj_file_fops) { - fput(file); + if (f.file->f_op != &drm_syncobj_file_fops) { + fdput(f); return -EINVAL; } /* take a reference to put in the idr */ - syncobj = file->private_data; + syncobj = f.file->private_data; drm_syncobj_get(syncobj); idr_preload(GFP_KERNEL); @@ -416,7 +585,7 @@ static int drm_syncobj_fd_to_handle(struct drm_file *file_private, } else drm_syncobj_put(syncobj); - fput(file); + fdput(f); return ret; } @@ -593,6 +762,80 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data, &args->handle); } +static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private, + struct drm_syncobj_transfer *args) +{ + struct drm_syncobj *timeline_syncobj = NULL; + struct dma_fence *fence; + struct dma_fence_chain *chain; + int ret; + + timeline_syncobj = drm_syncobj_find(file_private, args->dst_handle); + if (!timeline_syncobj) { + return -ENOENT; + } + ret = drm_syncobj_find_fence(file_private, args->src_handle, + args->src_point, args->flags, + &fence); + if (ret) + goto err; + chain = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL); + if (!chain) { + ret = -ENOMEM; + goto err1; + } + drm_syncobj_add_point(timeline_syncobj, chain, fence, args->dst_point); +err1: + dma_fence_put(fence); +err: + drm_syncobj_put(timeline_syncobj); + + return ret; +} + +static int +drm_syncobj_transfer_to_binary(struct drm_file *file_private, + struct drm_syncobj_transfer *args) +{ + struct drm_syncobj *binary_syncobj = NULL; + struct dma_fence *fence; + int ret; + + binary_syncobj = drm_syncobj_find(file_private, args->dst_handle); + if (!binary_syncobj) + return -ENOENT; + ret = drm_syncobj_find_fence(file_private, args->src_handle, + args->src_point, args->flags, &fence); + if (ret) + goto err; + drm_syncobj_replace_fence(binary_syncobj, fence); + dma_fence_put(fence); +err: + drm_syncobj_put(binary_syncobj); + + return ret; +} +int +drm_syncobj_transfer_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_private) +{ + struct drm_syncobj_transfer *args = data; + int ret; + + if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) + return -EOPNOTSUPP; + + if (args->pad) + return -EINVAL; + + if (args->dst_point) + ret = drm_syncobj_transfer_to_timeline(file_private, args); + else + ret = drm_syncobj_transfer_to_binary(file_private, args); + + return ret; +} + static void syncobj_wait_fence_func(struct dma_fence *fence, struct dma_fence_cb *cb) { @@ -605,13 +848,27 @@ static void syncobj_wait_fence_func(struct dma_fence *fence, static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj, struct syncobj_wait_entry *wait) { + struct dma_fence *fence; + /* This happens inside the syncobj lock */ - wait->fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, - lockdep_is_held(&syncobj->lock))); + fence = rcu_dereference_protected(syncobj->fence, + lockdep_is_held(&syncobj->lock)); + dma_fence_get(fence); + if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) { + dma_fence_put(fence); + return; + } else if (!fence) { + wait->fence = dma_fence_get_stub(); + } else { + wait->fence = fence; + } + wake_up_process(wait->task); + list_del_init(&wait->node); } static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, + void __user *user_points, uint32_t count, uint32_t flags, signed long timeout, @@ -619,12 +876,27 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, { struct syncobj_wait_entry *entries; struct dma_fence *fence; + uint64_t *points; uint32_t signaled_count, i; - entries = kcalloc(count, sizeof(*entries), GFP_KERNEL); - if (!entries) + points = kmalloc_array(count, sizeof(*points), GFP_KERNEL); + if (points == NULL) return -ENOMEM; + if (!user_points) { + memset(points, 0, count * sizeof(uint64_t)); + + } else if (copy_from_user(points, user_points, + sizeof(uint64_t) * count)) { + timeout = -EFAULT; + goto err_free_points; + } + + entries = kcalloc(count, sizeof(*entries), GFP_KERNEL); + if (!entries) { + timeout = -ENOMEM; + goto err_free_points; + } /* Walk the list of sync objects and initialize entries. We do * this up-front so that we can properly return -EINVAL if there is * a syncobj with a missing fence and then never have the chance of @@ -632,9 +904,13 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, */ signaled_count = 0; for (i = 0; i < count; ++i) { + struct dma_fence *fence; + entries[i].task = current; - entries[i].fence = drm_syncobj_fence_get(syncobjs[i]); - if (!entries[i].fence) { + entries[i].point = points[i]; + fence = drm_syncobj_fence_get(syncobjs[i]); + if (!fence || dma_fence_chain_find_seqno(&fence, points[i])) { + dma_fence_put(fence); if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { continue; } else { @@ -643,7 +919,13 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, } } - if (dma_fence_is_signaled(entries[i].fence)) { + if (fence) + entries[i].fence = fence; + else + entries[i].fence = dma_fence_get_stub(); + + if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) || + dma_fence_is_signaled(entries[i].fence)) { if (signaled_count == 0 && idx) *idx = i; signaled_count++; @@ -676,7 +958,8 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, if (!fence) continue; - if (dma_fence_is_signaled(fence) || + if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) || + dma_fence_is_signaled(fence) || (!entries[i].fence_cb.func && dma_fence_add_callback(fence, &entries[i].fence_cb, @@ -721,6 +1004,9 @@ cleanup_entries: } kfree(entries); +err_free_points: + kfree(points); + return timeout; } @@ -731,7 +1017,7 @@ cleanup_entries: * * Calculate the timeout in jiffies from an absolute time in sec/nsec. */ -static signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec) +signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec) { ktime_t abs_timeout, now; u64 timeout_ns, timeout_jiffies64; @@ -755,23 +1041,38 @@ static signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec) return timeout_jiffies64 + 1; } +EXPORT_SYMBOL(drm_timeout_abs_to_jiffies); static int drm_syncobj_array_wait(struct drm_device *dev, struct drm_file *file_private, struct drm_syncobj_wait *wait, - struct drm_syncobj **syncobjs) + struct drm_syncobj_timeline_wait *timeline_wait, + struct drm_syncobj **syncobjs, bool timeline) { - signed long timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec); + signed long timeout = 0; uint32_t first = ~0; - timeout = drm_syncobj_array_wait_timeout(syncobjs, - wait->count_handles, - wait->flags, - timeout, &first); - if (timeout < 0) - return timeout; - - wait->first_signaled = first; + if (!timeline) { + timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec); + timeout = drm_syncobj_array_wait_timeout(syncobjs, + NULL, + wait->count_handles, + wait->flags, + timeout, &first); + if (timeout < 0) + return timeout; + wait->first_signaled = first; + } else { + timeout = drm_timeout_abs_to_jiffies(timeline_wait->timeout_nsec); + timeout = drm_syncobj_array_wait_timeout(syncobjs, + u64_to_user_ptr(timeline_wait->points), + timeline_wait->count_handles, + timeline_wait->flags, + timeout, &first); + if (timeout < 0) + return timeout; + timeline_wait->first_signaled = first; + } return 0; } @@ -857,7 +1158,7 @@ drm_syncobj_wait_ioctl(struct drm_device *dev, void *data, return ret; ret = drm_syncobj_array_wait(dev, file_private, - args, syncobjs); + args, NULL, syncobjs, false); drm_syncobj_array_free(syncobjs, args->count_handles); @@ -865,6 +1166,41 @@ drm_syncobj_wait_ioctl(struct drm_device *dev, void *data, } int +drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_private) +{ + struct drm_syncobj_timeline_wait *args = data; + struct drm_syncobj **syncobjs; + int ret = 0; + + if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) + return -EOPNOTSUPP; + + if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | + DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT | + DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) + return -EINVAL; + + if (args->count_handles == 0) + return -EINVAL; + + ret = drm_syncobj_array_find(file_private, + u64_to_user_ptr(args->handles), + args->count_handles, + &syncobjs); + if (ret < 0) + return ret; + + ret = drm_syncobj_array_wait(dev, file_private, + NULL, args, syncobjs, true); + + drm_syncobj_array_free(syncobjs, args->count_handles); + + return ret; +} + + +int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data, struct drm_file *file_private) { @@ -929,3 +1265,145 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data, return ret; } + +int +drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_private) +{ + struct drm_syncobj_timeline_array *args = data; + struct drm_syncobj **syncobjs; + struct dma_fence_chain **chains; + uint64_t *points; + uint32_t i, j; + int ret; + + if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) + return -EOPNOTSUPP; + + if (args->flags != 0) + return -EINVAL; + + if (args->count_handles == 0) + return -EINVAL; + + ret = drm_syncobj_array_find(file_private, + u64_to_user_ptr(args->handles), + args->count_handles, + &syncobjs); + if (ret < 0) + return ret; + + points = kmalloc_array(args->count_handles, sizeof(*points), + GFP_KERNEL); + if (!points) { + ret = -ENOMEM; + goto out; + } + if (!u64_to_user_ptr(args->points)) { + memset(points, 0, args->count_handles * sizeof(uint64_t)); + } else if (copy_from_user(points, u64_to_user_ptr(args->points), + sizeof(uint64_t) * args->count_handles)) { + ret = -EFAULT; + goto err_points; + } + + chains = kmalloc_array(args->count_handles, sizeof(void *), GFP_KERNEL); + if (!chains) { + ret = -ENOMEM; + goto err_points; + } + for (i = 0; i < args->count_handles; i++) { + chains[i] = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL); + if (!chains[i]) { + for (j = 0; j < i; j++) + kfree(chains[j]); + ret = -ENOMEM; + goto err_chains; + } + } + + for (i = 0; i < args->count_handles; i++) { + struct dma_fence *fence = dma_fence_get_stub(); + + drm_syncobj_add_point(syncobjs[i], chains[i], + fence, points[i]); + dma_fence_put(fence); + } +err_chains: + kfree(chains); +err_points: + kfree(points); +out: + drm_syncobj_array_free(syncobjs, args->count_handles); + + return ret; +} + +int drm_syncobj_query_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_private) +{ + struct drm_syncobj_timeline_array *args = data; + struct drm_syncobj **syncobjs; + uint64_t __user *points = u64_to_user_ptr(args->points); + uint32_t i; + int ret; + + if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) + return -EOPNOTSUPP; + + if (args->flags & ~DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) + return -EINVAL; + + if (args->count_handles == 0) + return -EINVAL; + + ret = drm_syncobj_array_find(file_private, + u64_to_user_ptr(args->handles), + args->count_handles, + &syncobjs); + if (ret < 0) + return ret; + + for (i = 0; i < args->count_handles; i++) { + struct dma_fence_chain *chain; + struct dma_fence *fence; + uint64_t point; + + fence = drm_syncobj_fence_get(syncobjs[i]); + chain = to_dma_fence_chain(fence); + if (chain) { + struct dma_fence *iter, *last_signaled = + dma_fence_get(fence); + + if (args->flags & + DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) { + point = fence->seqno; + } else { + dma_fence_chain_for_each(iter, fence) { + if (iter->context != fence->context) { + dma_fence_put(iter); + /* It is most likely that timeline has + * unorder points. */ + break; + } + dma_fence_put(last_signaled); + last_signaled = dma_fence_get(iter); + } + point = dma_fence_is_signaled(last_signaled) ? + last_signaled->seqno : + to_dma_fence_chain(last_signaled)->prev_seqno; + } + dma_fence_put(last_signaled); + } else { + point = 0; + } + dma_fence_put(fence); + ret = copy_to_user(&points[i], &point, sizeof(uint64_t)); + ret = ret ? -EFAULT : 0; + if (ret) + break; + } + drm_syncobj_array_free(syncobjs, args->count_handles); + + return ret; +} |