| /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/file.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/uaccess.h> |
| |
| #include <asm/current.h> |
| |
| #include "kgsl_sync.h" |
| |
| static void kgsl_sync_timeline_signal(struct kgsl_sync_timeline *timeline, |
| unsigned int timestamp); |
| |
| static const struct fence_ops kgsl_sync_fence_ops; |
| |
| static struct kgsl_sync_fence *kgsl_sync_fence_create( |
| struct kgsl_context *context, |
| unsigned int timestamp) |
| { |
| struct kgsl_sync_fence *kfence; |
| struct kgsl_sync_timeline *ktimeline = context->ktimeline; |
| unsigned long flags; |
| |
| /* Get a refcount to the timeline. Put when released */ |
| if (!kref_get_unless_zero(&ktimeline->kref)) |
| return NULL; |
| |
| kfence = kzalloc(sizeof(*kfence), GFP_KERNEL); |
| if (kfence == NULL) { |
| kgsl_sync_timeline_put(ktimeline); |
| KGSL_DRV_ERR(context->device, "Couldn't allocate fence\n"); |
| return NULL; |
| } |
| |
| kfence->parent = ktimeline; |
| kfence->context_id = context->id; |
| kfence->timestamp = timestamp; |
| |
| fence_init(&kfence->fence, &kgsl_sync_fence_ops, &ktimeline->lock, |
| ktimeline->fence_context, timestamp); |
| |
| /* |
| * sync_file_create() takes a refcount to the fence. This refcount is |
| * put when the fence is signaled. |
| */ |
| kfence->sync_file = sync_file_create(&kfence->fence); |
| |
| if (kfence->sync_file == NULL) { |
| kgsl_sync_timeline_put(ktimeline); |
| KGSL_DRV_ERR(context->device, "Create sync_file failed\n"); |
| kfree(kfence); |
| return NULL; |
| } |
| |
| spin_lock_irqsave(&ktimeline->lock, flags); |
| list_add_tail(&kfence->child_list, &ktimeline->child_list_head); |
| spin_unlock_irqrestore(&ktimeline->lock, flags); |
| |
| return kfence; |
| } |
| |
| static void kgsl_sync_fence_release(struct fence *fence) |
| { |
| struct kgsl_sync_fence *kfence = (struct kgsl_sync_fence *)fence; |
| |
| kgsl_sync_timeline_put(kfence->parent); |
| kfree(kfence); |
| } |
| |
| /* Called with ktimeline->lock held */ |
| bool kgsl_sync_fence_has_signaled(struct fence *fence) |
| { |
| struct kgsl_sync_fence *kfence = (struct kgsl_sync_fence *)fence; |
| struct kgsl_sync_timeline *ktimeline = kfence->parent; |
| unsigned int ts = kfence->timestamp; |
| |
| return (timestamp_cmp(ktimeline->last_timestamp, ts) >= 0); |
| } |
| |
| bool kgsl_enable_signaling(struct fence *fence) |
| { |
| return !kgsl_sync_fence_has_signaled(fence); |
| } |
| |
| struct kgsl_sync_fence_event_priv { |
| struct kgsl_context *context; |
| unsigned int timestamp; |
| }; |
| |
| /** |
| * kgsl_sync_fence_event_cb - Event callback for a fence timestamp event |
| * @device - The KGSL device that expired the timestamp |
| * @context- Pointer to the context that owns the event |
| * @priv: Private data for the callback |
| * @result - Result of the event (retired or canceled) |
| * |
| * Signal a fence following the expiration of a timestamp |
| */ |
| |
| static void kgsl_sync_fence_event_cb(struct kgsl_device *device, |
| struct kgsl_event_group *group, void *priv, int result) |
| { |
| struct kgsl_sync_fence_event_priv *ev = priv; |
| |
| kgsl_sync_timeline_signal(ev->context->ktimeline, ev->timestamp); |
| kgsl_context_put(ev->context); |
| kfree(ev); |
| } |
| |
| static int _add_fence_event(struct kgsl_device *device, |
| struct kgsl_context *context, unsigned int timestamp) |
| { |
| struct kgsl_sync_fence_event_priv *event; |
| int ret; |
| |
| event = kmalloc(sizeof(*event), GFP_KERNEL); |
| if (event == NULL) |
| return -ENOMEM; |
| |
| /* |
| * Increase the refcount for the context to keep it through the |
| * callback |
| */ |
| if (!_kgsl_context_get(context)) { |
| kfree(event); |
| return -ENOENT; |
| } |
| |
| event->context = context; |
| event->timestamp = timestamp; |
| |
| ret = kgsl_add_event(device, &context->events, timestamp, |
| kgsl_sync_fence_event_cb, event); |
| |
| if (ret) { |
| kgsl_context_put(context); |
| kfree(event); |
| } |
| |
| return ret; |
| } |
| |
| /* Only to be used if creating a related event failed */ |
| static void kgsl_sync_cancel(struct kgsl_sync_fence *kfence) |
| { |
| spin_lock(&kfence->parent->lock); |
| if (!list_empty(&kfence->child_list)) { |
| list_del_init(&kfence->child_list); |
| fence_put(&kfence->fence); |
| } |
| spin_unlock(&kfence->parent->lock); |
| } |
| |
| /** |
| * kgsl_add_fence_event - Create a new fence event |
| * @device - KGSL device to create the event on |
| * @timestamp - Timestamp to trigger the event |
| * @data - Return fence fd stored in struct kgsl_timestamp_event_fence |
| * @len - length of the fence event |
| * @owner - driver instance that owns this event |
| * @returns 0 on success or error code on error |
| * |
| * Create a fence and register an event to signal the fence when |
| * the timestamp expires |
| */ |
| |
| int kgsl_add_fence_event(struct kgsl_device *device, |
| u32 context_id, u32 timestamp, void __user *data, int len, |
| struct kgsl_device_private *owner) |
| { |
| struct kgsl_timestamp_event_fence priv; |
| struct kgsl_context *context; |
| struct kgsl_sync_fence *kfence = NULL; |
| int ret = -EINVAL; |
| unsigned int cur; |
| |
| priv.fence_fd = -1; |
| |
| if (len != sizeof(priv)) |
| return -EINVAL; |
| |
| context = kgsl_context_get_owner(owner, context_id); |
| |
| if (context == NULL) |
| return -EINVAL; |
| |
| if (test_bit(KGSL_CONTEXT_PRIV_INVALID, &context->priv)) |
| goto out; |
| |
| kfence = kgsl_sync_fence_create(context, timestamp); |
| if (kfence == NULL) { |
| KGSL_DRV_CRIT_RATELIMIT(device, |
| "kgsl_sync_fence_create failed\n"); |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| priv.fence_fd = get_unused_fd_flags(0); |
| if (priv.fence_fd < 0) { |
| KGSL_DRV_CRIT_RATELIMIT(device, |
| "Unable to get a file descriptor: %d\n", |
| priv.fence_fd); |
| ret = priv.fence_fd; |
| goto out; |
| } |
| |
| /* |
| * If the timestamp hasn't expired yet create an event to trigger it. |
| * Otherwise, just signal the fence - there is no reason to go through |
| * the effort of creating a fence we don't need. |
| */ |
| |
| kgsl_readtimestamp(device, context, KGSL_TIMESTAMP_RETIRED, &cur); |
| |
| if (timestamp_cmp(cur, timestamp) >= 0) { |
| ret = 0; |
| kgsl_sync_timeline_signal(context->ktimeline, cur); |
| } else { |
| ret = _add_fence_event(device, context, timestamp); |
| if (ret) |
| goto out; |
| } |
| |
| if (copy_to_user(data, &priv, sizeof(priv))) { |
| ret = -EFAULT; |
| goto out; |
| } |
| fd_install(priv.fence_fd, kfence->sync_file->file); |
| |
| out: |
| kgsl_context_put(context); |
| if (ret) { |
| if (priv.fence_fd >= 0) |
| put_unused_fd(priv.fence_fd); |
| |
| if (kfence) { |
| kgsl_sync_cancel(kfence); |
| /* |
| * Put the refcount of sync file. This will release |
| * kfence->fence as well. |
| */ |
| fput(kfence->sync_file->file); |
| } |
| } |
| return ret; |
| } |
| |
| static unsigned int kgsl_sync_fence_get_timestamp( |
| struct kgsl_sync_timeline *ktimeline, |
| enum kgsl_timestamp_type type) |
| { |
| unsigned int ret = 0; |
| |
| if (ktimeline->device == NULL) |
| return 0; |
| |
| kgsl_readtimestamp(ktimeline->device, ktimeline->context, type, &ret); |
| |
| return ret; |
| } |
| |
| static void kgsl_sync_timeline_value_str(struct fence *fence, |
| char *str, int size) |
| { |
| struct kgsl_sync_fence *kfence = (struct kgsl_sync_fence *)fence; |
| struct kgsl_sync_timeline *ktimeline = kfence->parent; |
| |
| unsigned int timestamp_retired; |
| unsigned int timestamp_queued; |
| |
| if (!kref_get_unless_zero(&ktimeline->kref)) |
| return; |
| |
| /* |
| * This callback can be called before the device and spinlock are |
| * initialized in struct kgsl_sync_timeline. kgsl_sync_get_timestamp() |
| * will check if device is NULL and return 0. Queued and retired |
| * timestamp of the context will be reported as 0, which is correct |
| * because the context and timeline are just getting initialized. |
| */ |
| timestamp_retired = kgsl_sync_fence_get_timestamp(ktimeline, |
| KGSL_TIMESTAMP_RETIRED); |
| timestamp_queued = kgsl_sync_fence_get_timestamp(ktimeline, |
| KGSL_TIMESTAMP_QUEUED); |
| |
| snprintf(str, size, "%u queued:%u retired:%u", |
| ktimeline->last_timestamp, |
| timestamp_queued, timestamp_retired); |
| |
| kgsl_sync_timeline_put(ktimeline); |
| } |
| |
| static void kgsl_sync_fence_value_str(struct fence *fence, char *str, int size) |
| { |
| struct kgsl_sync_fence *kfence = (struct kgsl_sync_fence *)fence; |
| |
| snprintf(str, size, "%u", kfence->timestamp); |
| } |
| |
| static const char *kgsl_sync_fence_driver_name(struct fence *fence) |
| { |
| return "kgsl-timeline"; |
| } |
| |
| static const char *kgsl_sync_timeline_name(struct fence *fence) |
| { |
| struct kgsl_sync_fence *kfence = (struct kgsl_sync_fence *)fence; |
| struct kgsl_sync_timeline *ktimeline = kfence->parent; |
| |
| return ktimeline->name; |
| } |
| |
| int kgsl_sync_timeline_create(struct kgsl_context *context) |
| { |
| struct kgsl_sync_timeline *ktimeline; |
| |
| /* |
| * Generate a name which includes the thread name, thread id, process |
| * name, process id, and context id. This makes it possible to |
| * identify the context of a timeline in the sync dump. |
| */ |
| char ktimeline_name[sizeof(ktimeline->name)] = {}; |
| |
| /* Put context when timeline is released */ |
| if (!_kgsl_context_get(context)) |
| return -ENOENT; |
| |
| snprintf(ktimeline_name, sizeof(ktimeline_name), |
| "%s_%d-%.15s(%d)-%.15s(%d)", |
| context->device->name, context->id, |
| current->group_leader->comm, current->group_leader->pid, |
| current->comm, current->pid); |
| |
| ktimeline = kzalloc(sizeof(*ktimeline), GFP_KERNEL); |
| if (ktimeline == NULL) { |
| kgsl_context_put(context); |
| return -ENOMEM; |
| } |
| |
| kref_init(&ktimeline->kref); |
| strlcpy(ktimeline->name, ktimeline_name, KGSL_TIMELINE_NAME_LEN); |
| ktimeline->fence_context = fence_context_alloc(1); |
| ktimeline->last_timestamp = 0; |
| INIT_LIST_HEAD(&ktimeline->child_list_head); |
| spin_lock_init(&ktimeline->lock); |
| ktimeline->device = context->device; |
| ktimeline->context = context; |
| |
| context->ktimeline = ktimeline; |
| |
| return 0; |
| } |
| |
| static void kgsl_sync_timeline_signal(struct kgsl_sync_timeline *ktimeline, |
| unsigned int timestamp) |
| { |
| unsigned long flags; |
| struct kgsl_sync_fence *kfence, *next; |
| |
| if (!kref_get_unless_zero(&ktimeline->kref)) |
| return; |
| |
| spin_lock_irqsave(&ktimeline->lock, flags); |
| if (timestamp_cmp(timestamp, ktimeline->last_timestamp) > 0) |
| ktimeline->last_timestamp = timestamp; |
| |
| list_for_each_entry_safe(kfence, next, &ktimeline->child_list_head, |
| child_list) { |
| if (fence_is_signaled_locked(&kfence->fence)) { |
| list_del_init(&kfence->child_list); |
| fence_put(&kfence->fence); |
| } |
| } |
| |
| spin_unlock_irqrestore(&ktimeline->lock, flags); |
| kgsl_sync_timeline_put(ktimeline); |
| } |
| |
| void kgsl_sync_timeline_destroy(struct kgsl_context *context) |
| { |
| kfree(context->ktimeline); |
| } |
| |
| static void kgsl_sync_timeline_release(struct kref *kref) |
| { |
| struct kgsl_sync_timeline *ktimeline = |
| container_of(kref, struct kgsl_sync_timeline, kref); |
| |
| /* |
| * Only put the context refcount here. The context destroy function |
| * will call kgsl_sync_timeline_destroy() to kfree it |
| */ |
| kgsl_context_put(ktimeline->context); |
| } |
| |
| void kgsl_sync_timeline_put(struct kgsl_sync_timeline *ktimeline) |
| { |
| if (ktimeline) |
| kref_put(&ktimeline->kref, kgsl_sync_timeline_release); |
| } |
| |
| static const struct fence_ops kgsl_sync_fence_ops = { |
| .get_driver_name = kgsl_sync_fence_driver_name, |
| .get_timeline_name = kgsl_sync_timeline_name, |
| .enable_signaling = kgsl_enable_signaling, |
| .signaled = kgsl_sync_fence_has_signaled, |
| .wait = fence_default_wait, |
| .release = kgsl_sync_fence_release, |
| |
| .fence_value_str = kgsl_sync_fence_value_str, |
| .timeline_value_str = kgsl_sync_timeline_value_str, |
| }; |
| |
| static void kgsl_sync_fence_callback(struct fence *fence, struct fence_cb *cb) |
| { |
| struct kgsl_sync_fence_cb *kcb = (struct kgsl_sync_fence_cb *)cb; |
| |
| /* |
| * If the callback is marked for cancellation in a separate thread, |
| * let the other thread do the cleanup. |
| */ |
| if (kcb->func(kcb->priv)) { |
| fence_put(kcb->fence); |
| kfree(kcb); |
| } |
| } |
| |
| static void kgsl_get_fence_names(struct fence *fence, |
| struct event_fence_info *info_ptr) |
| { |
| unsigned int num_fences; |
| struct fence **fences; |
| struct fence_array *array; |
| int i; |
| |
| if (!info_ptr) |
| return; |
| |
| array = to_fence_array(fence); |
| |
| if (array != NULL) { |
| num_fences = array->num_fences; |
| fences = array->fences; |
| } else { |
| num_fences = 1; |
| fences = &fence; |
| } |
| |
| info_ptr->fences = kcalloc(num_fences, sizeof(struct fence_info), |
| GFP_ATOMIC); |
| if (info_ptr->fences == NULL) |
| return; |
| |
| info_ptr->num_fences = num_fences; |
| |
| for (i = 0; i < num_fences; i++) { |
| struct fence *f = fences[i]; |
| struct fence_info *fi = &info_ptr->fences[i]; |
| int len; |
| |
| len = scnprintf(fi->name, sizeof(fi->name), "%s %s", |
| f->ops->get_driver_name(f), |
| f->ops->get_timeline_name(f)); |
| |
| if (f->ops->fence_value_str) { |
| len += scnprintf(fi->name + len, sizeof(fi->name) - len, |
| ": "); |
| f->ops->fence_value_str(f, fi->name + len, |
| sizeof(fi->name) - len); |
| } |
| } |
| } |
| |
| struct kgsl_sync_fence_cb *kgsl_sync_fence_async_wait(int fd, |
| bool (*func)(void *priv), void *priv, struct event_fence_info *info_ptr) |
| { |
| struct kgsl_sync_fence_cb *kcb; |
| struct fence *fence; |
| int status; |
| |
| fence = sync_file_get_fence(fd); |
| if (fence == NULL) |
| return ERR_PTR(-EINVAL); |
| |
| /* create the callback */ |
| kcb = kzalloc(sizeof(*kcb), GFP_ATOMIC); |
| if (kcb == NULL) { |
| fence_put(fence); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| kcb->fence = fence; |
| kcb->priv = priv; |
| kcb->func = func; |
| |
| kgsl_get_fence_names(fence, info_ptr); |
| |
| /* if status then error or signaled */ |
| status = fence_add_callback(fence, &kcb->fence_cb, |
| kgsl_sync_fence_callback); |
| |
| if (status) { |
| kfree(kcb); |
| if (!fence_is_signaled(fence)) |
| kcb = ERR_PTR(status); |
| else |
| kcb = NULL; |
| fence_put(fence); |
| } |
| |
| return kcb; |
| } |
| |
| /* |
| * Cancel the fence async callback and do the cleanup. The caller must make |
| * sure that the callback (if run before cancelling) returns false, so that |
| * no other thread frees the pointer. |
| */ |
| void kgsl_sync_fence_async_cancel(struct kgsl_sync_fence_cb *kcb) |
| { |
| if (kcb == NULL) |
| return; |
| |
| /* |
| * After fence_remove_callback() returns, the fence callback is |
| * either not called at all, or completed without freeing kcb. |
| * This thread can then put the fence refcount and free kcb. |
| */ |
| fence_remove_callback(kcb->fence, &kcb->fence_cb); |
| fence_put(kcb->fence); |
| kfree(kcb); |
| } |
| |
| struct kgsl_syncsource { |
| struct kref refcount; |
| char name[KGSL_TIMELINE_NAME_LEN]; |
| int id; |
| struct kgsl_process_private *private; |
| struct list_head child_list_head; |
| spinlock_t lock; |
| }; |
| |
| struct kgsl_syncsource_fence { |
| struct fence fence; |
| struct kgsl_syncsource *parent; |
| struct list_head child_list; |
| }; |
| |
| static const struct fence_ops kgsl_syncsource_fence_ops; |
| |
| long kgsl_ioctl_syncsource_create(struct kgsl_device_private *dev_priv, |
| unsigned int cmd, void *data) |
| { |
| struct kgsl_syncsource *syncsource = NULL; |
| struct kgsl_syncsource_create *param = data; |
| int ret = -EINVAL; |
| int id = 0; |
| struct kgsl_process_private *private = dev_priv->process_priv; |
| char name[KGSL_TIMELINE_NAME_LEN]; |
| |
| if (!kgsl_process_private_get(private)) |
| return ret; |
| |
| syncsource = kzalloc(sizeof(*syncsource), GFP_KERNEL); |
| if (syncsource == NULL) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| snprintf(name, sizeof(name), "kgsl-syncsource-pid-%d", |
| current->group_leader->pid); |
| |
| kref_init(&syncsource->refcount); |
| strlcpy(syncsource->name, name, KGSL_TIMELINE_NAME_LEN); |
| syncsource->private = private; |
| INIT_LIST_HEAD(&syncsource->child_list_head); |
| spin_lock_init(&syncsource->lock); |
| |
| idr_preload(GFP_KERNEL); |
| spin_lock(&private->syncsource_lock); |
| id = idr_alloc(&private->syncsource_idr, syncsource, 1, 0, GFP_NOWAIT); |
| if (id > 0) { |
| syncsource->id = id; |
| param->id = id; |
| ret = 0; |
| } else { |
| ret = id; |
| } |
| |
| spin_unlock(&private->syncsource_lock); |
| idr_preload_end(); |
| |
| out: |
| if (ret) { |
| kgsl_process_private_put(private); |
| kfree(syncsource); |
| } |
| |
| return ret; |
| } |
| |
| static struct kgsl_syncsource * |
| kgsl_syncsource_get(struct kgsl_process_private *private, int id) |
| { |
| int result = 0; |
| struct kgsl_syncsource *syncsource = NULL; |
| |
| spin_lock(&private->syncsource_lock); |
| |
| syncsource = idr_find(&private->syncsource_idr, id); |
| if (syncsource) |
| result = kref_get_unless_zero(&syncsource->refcount); |
| |
| spin_unlock(&private->syncsource_lock); |
| |
| return result ? syncsource : NULL; |
| } |
| |
| static void kgsl_syncsource_destroy(struct kref *kref) |
| { |
| struct kgsl_syncsource *syncsource = container_of(kref, |
| struct kgsl_syncsource, |
| refcount); |
| |
| struct kgsl_process_private *private = syncsource->private; |
| |
| /* Done with process private. Release the refcount */ |
| kgsl_process_private_put(private); |
| |
| kfree(syncsource); |
| } |
| |
| void kgsl_syncsource_put(struct kgsl_syncsource *syncsource) |
| { |
| if (syncsource) |
| kref_put(&syncsource->refcount, kgsl_syncsource_destroy); |
| } |
| |
| static void kgsl_syncsource_cleanup(struct kgsl_process_private *private, |
| struct kgsl_syncsource *syncsource) |
| { |
| struct kgsl_syncsource_fence *sfence, *next; |
| |
| /* Signal all fences to release any callbacks */ |
| spin_lock(&syncsource->lock); |
| |
| list_for_each_entry_safe(sfence, next, &syncsource->child_list_head, |
| child_list) { |
| fence_signal_locked(&sfence->fence); |
| list_del_init(&sfence->child_list); |
| } |
| |
| spin_unlock(&syncsource->lock); |
| |
| /* put reference from syncsource creation */ |
| kgsl_syncsource_put(syncsource); |
| } |
| |
| long kgsl_ioctl_syncsource_destroy(struct kgsl_device_private *dev_priv, |
| unsigned int cmd, void *data) |
| { |
| struct kgsl_syncsource_destroy *param = data; |
| struct kgsl_syncsource *syncsource = NULL; |
| struct kgsl_process_private *private = dev_priv->process_priv; |
| |
| spin_lock(&private->syncsource_lock); |
| syncsource = idr_find(&private->syncsource_idr, param->id); |
| |
| if (syncsource == NULL) { |
| spin_unlock(&private->syncsource_lock); |
| return -EINVAL; |
| } |
| |
| if (syncsource->id != 0) { |
| idr_remove(&private->syncsource_idr, syncsource->id); |
| syncsource->id = 0; |
| } |
| spin_unlock(&private->syncsource_lock); |
| |
| kgsl_syncsource_cleanup(private, syncsource); |
| return 0; |
| } |
| |
| long kgsl_ioctl_syncsource_create_fence(struct kgsl_device_private *dev_priv, |
| unsigned int cmd, void *data) |
| { |
| struct kgsl_syncsource_create_fence *param = data; |
| struct kgsl_syncsource *syncsource = NULL; |
| int ret = -EINVAL; |
| struct kgsl_syncsource_fence *sfence = NULL; |
| struct sync_file *sync_file = NULL; |
| int fd = -1; |
| |
| /* |
| * Take a refcount that is released when the fence is released |
| * (or if fence can't be added to the syncsource). |
| */ |
| syncsource = kgsl_syncsource_get(dev_priv->process_priv, |
| param->id); |
| if (syncsource == NULL) |
| goto out; |
| |
| sfence = kzalloc(sizeof(*sfence), GFP_KERNEL); |
| if (sfence == NULL) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| sfence->parent = syncsource; |
| |
| /* Use a new fence context for each fence */ |
| fence_init(&sfence->fence, &kgsl_syncsource_fence_ops, |
| &syncsource->lock, fence_context_alloc(1), 1); |
| |
| sync_file = sync_file_create(&sfence->fence); |
| |
| if (sync_file == NULL) { |
| KGSL_DRV_ERR(dev_priv->device, "Create sync_file failed\n"); |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| fd = get_unused_fd_flags(0); |
| if (fd < 0) { |
| ret = -EBADF; |
| goto out; |
| } |
| ret = 0; |
| |
| fd_install(fd, sync_file->file); |
| |
| param->fence_fd = fd; |
| |
| spin_lock(&syncsource->lock); |
| list_add_tail(&sfence->child_list, &syncsource->child_list_head); |
| spin_unlock(&syncsource->lock); |
| out: |
| /* |
| * We're transferring ownership of the fence to the sync file. |
| * The sync file takes an extra refcount when it is created, so put |
| * our refcount. |
| */ |
| if (sync_file) |
| fence_put(&sfence->fence); |
| |
| if (ret) { |
| if (sync_file) |
| fput(sync_file->file); |
| else if (sfence) |
| fence_put(&sfence->fence); |
| else |
| kgsl_syncsource_put(syncsource); |
| } |
| |
| return ret; |
| } |
| |
| static int kgsl_syncsource_signal(struct kgsl_syncsource *syncsource, |
| struct fence *fence) |
| { |
| struct kgsl_syncsource_fence *sfence, *next; |
| int ret = -EINVAL; |
| |
| spin_lock(&syncsource->lock); |
| |
| list_for_each_entry_safe(sfence, next, &syncsource->child_list_head, |
| child_list) { |
| if (fence == &sfence->fence) { |
| fence_signal_locked(fence); |
| list_del_init(&sfence->child_list); |
| |
| ret = 0; |
| break; |
| } |
| } |
| |
| spin_unlock(&syncsource->lock); |
| |
| return ret; |
| } |
| |
| long kgsl_ioctl_syncsource_signal_fence(struct kgsl_device_private *dev_priv, |
| unsigned int cmd, void *data) |
| { |
| int ret = -EINVAL; |
| struct kgsl_syncsource_signal_fence *param = data; |
| struct kgsl_syncsource *syncsource = NULL; |
| struct fence *fence = NULL; |
| |
| syncsource = kgsl_syncsource_get(dev_priv->process_priv, |
| param->id); |
| if (syncsource == NULL) |
| goto out; |
| |
| fence = sync_file_get_fence(param->fence_fd); |
| if (fence == NULL) { |
| ret = -EBADF; |
| goto out; |
| } |
| |
| ret = kgsl_syncsource_signal(syncsource, fence); |
| out: |
| if (fence) |
| fence_put(fence); |
| if (syncsource) |
| kgsl_syncsource_put(syncsource); |
| return ret; |
| } |
| |
| static void kgsl_syncsource_fence_release(struct fence *fence) |
| { |
| struct kgsl_syncsource_fence *sfence = |
| (struct kgsl_syncsource_fence *)fence; |
| |
| /* Signal if it's not signaled yet */ |
| kgsl_syncsource_signal(sfence->parent, fence); |
| |
| /* Release the refcount on the syncsource */ |
| kgsl_syncsource_put(sfence->parent); |
| |
| kfree(sfence); |
| } |
| |
| void kgsl_syncsource_process_release_syncsources( |
| struct kgsl_process_private *private) |
| { |
| struct kgsl_syncsource *syncsource; |
| int next = 0; |
| |
| while (1) { |
| spin_lock(&private->syncsource_lock); |
| syncsource = idr_get_next(&private->syncsource_idr, &next); |
| |
| if (syncsource == NULL) { |
| spin_unlock(&private->syncsource_lock); |
| break; |
| } |
| |
| if (syncsource->id != 0) { |
| idr_remove(&private->syncsource_idr, syncsource->id); |
| syncsource->id = 0; |
| } |
| spin_unlock(&private->syncsource_lock); |
| |
| kgsl_syncsource_cleanup(private, syncsource); |
| next = next + 1; |
| } |
| } |
| |
| static const char *kgsl_syncsource_get_timeline_name(struct fence *fence) |
| { |
| struct kgsl_syncsource_fence *sfence = |
| (struct kgsl_syncsource_fence *)fence; |
| struct kgsl_syncsource *syncsource = sfence->parent; |
| |
| return syncsource->name; |
| } |
| |
| static bool kgsl_syncsource_enable_signaling(struct fence *fence) |
| { |
| return true; |
| } |
| |
| static const char *kgsl_syncsource_driver_name(struct fence *fence) |
| { |
| return "kgsl-syncsource-timeline"; |
| } |
| |
| static void kgsl_syncsource_fence_value_str(struct fence *fence, |
| char *str, int size) |
| { |
| /* |
| * Each fence is independent of the others on the same timeline. |
| * We use a different context for each of them. |
| */ |
| snprintf(str, size, "%llu", fence->context); |
| } |
| |
| static const struct fence_ops kgsl_syncsource_fence_ops = { |
| .get_driver_name = kgsl_syncsource_driver_name, |
| .get_timeline_name = kgsl_syncsource_get_timeline_name, |
| .enable_signaling = kgsl_syncsource_enable_signaling, |
| .wait = fence_default_wait, |
| .release = kgsl_syncsource_fence_release, |
| |
| .fence_value_str = kgsl_syncsource_fence_value_str, |
| }; |
| |