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89669e7a7f
The commit "vmwgfx: Rework fence event action" introduced a number of bugs that are fixed with this commit: a) A forgotten return stateemnt. b) An if statement with identical branches. Cc: <stable@vger.kernel.org> Reported-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com>
1189 lines
32 KiB
C
1189 lines
32 KiB
C
/**************************************************************************
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*
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* Copyright © 2011 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include <drm/drmP.h>
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#include "vmwgfx_drv.h"
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#define VMW_FENCE_WRAP (1 << 31)
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struct vmw_fence_manager {
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int num_fence_objects;
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struct vmw_private *dev_priv;
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spinlock_t lock;
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struct list_head fence_list;
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struct work_struct work, ping_work;
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u32 user_fence_size;
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u32 fence_size;
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u32 event_fence_action_size;
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bool fifo_down;
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struct list_head cleanup_list;
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uint32_t pending_actions[VMW_ACTION_MAX];
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struct mutex goal_irq_mutex;
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bool goal_irq_on; /* Protected by @goal_irq_mutex */
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bool seqno_valid; /* Protected by @lock, and may not be set to true
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without the @goal_irq_mutex held. */
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unsigned ctx;
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};
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struct vmw_user_fence {
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struct ttm_base_object base;
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struct vmw_fence_obj fence;
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};
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/**
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* struct vmw_event_fence_action - fence action that delivers a drm event.
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*
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* @e: A struct drm_pending_event that controls the event delivery.
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* @action: A struct vmw_fence_action to hook up to a fence.
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* @fence: A referenced pointer to the fence to keep it alive while @action
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* hangs on it.
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* @dev: Pointer to a struct drm_device so we can access the event stuff.
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* @kref: Both @e and @action has destructors, so we need to refcount.
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* @size: Size accounted for this object.
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* @tv_sec: If non-null, the variable pointed to will be assigned
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* current time tv_sec val when the fence signals.
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* @tv_usec: Must be set if @tv_sec is set, and the variable pointed to will
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* be assigned the current time tv_usec val when the fence signals.
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*/
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struct vmw_event_fence_action {
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struct vmw_fence_action action;
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struct list_head fpriv_head;
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struct drm_pending_event *event;
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struct vmw_fence_obj *fence;
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struct drm_device *dev;
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uint32_t *tv_sec;
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uint32_t *tv_usec;
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};
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static struct vmw_fence_manager *
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fman_from_fence(struct vmw_fence_obj *fence)
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{
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return container_of(fence->base.lock, struct vmw_fence_manager, lock);
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}
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/**
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* Note on fencing subsystem usage of irqs:
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* Typically the vmw_fences_update function is called
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*
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* a) When a new fence seqno has been submitted by the fifo code.
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* b) On-demand when we have waiters. Sleeping waiters will switch on the
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* ANY_FENCE irq and call vmw_fences_update function each time an ANY_FENCE
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* irq is received. When the last fence waiter is gone, that IRQ is masked
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* away.
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*
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* In situations where there are no waiters and we don't submit any new fences,
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* fence objects may not be signaled. This is perfectly OK, since there are
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* no consumers of the signaled data, but that is NOT ok when there are fence
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* actions attached to a fence. The fencing subsystem then makes use of the
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* FENCE_GOAL irq and sets the fence goal seqno to that of the next fence
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* which has an action attached, and each time vmw_fences_update is called,
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* the subsystem makes sure the fence goal seqno is updated.
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*
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* The fence goal seqno irq is on as long as there are unsignaled fence
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* objects with actions attached to them.
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*/
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static void vmw_fence_obj_destroy(struct fence *f)
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{
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struct vmw_fence_obj *fence =
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container_of(f, struct vmw_fence_obj, base);
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struct vmw_fence_manager *fman = fman_from_fence(fence);
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unsigned long irq_flags;
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spin_lock_irqsave(&fman->lock, irq_flags);
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list_del_init(&fence->head);
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--fman->num_fence_objects;
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spin_unlock_irqrestore(&fman->lock, irq_flags);
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fence->destroy(fence);
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}
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static const char *vmw_fence_get_driver_name(struct fence *f)
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{
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return "vmwgfx";
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}
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static const char *vmw_fence_get_timeline_name(struct fence *f)
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{
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return "svga";
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}
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static void vmw_fence_ping_func(struct work_struct *work)
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{
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struct vmw_fence_manager *fman =
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container_of(work, struct vmw_fence_manager, ping_work);
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vmw_fifo_ping_host(fman->dev_priv, SVGA_SYNC_GENERIC);
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}
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static bool vmw_fence_enable_signaling(struct fence *f)
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{
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struct vmw_fence_obj *fence =
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container_of(f, struct vmw_fence_obj, base);
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struct vmw_fence_manager *fman = fman_from_fence(fence);
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struct vmw_private *dev_priv = fman->dev_priv;
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__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
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u32 seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
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if (seqno - fence->base.seqno < VMW_FENCE_WRAP)
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return false;
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if (mutex_trylock(&dev_priv->hw_mutex)) {
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vmw_fifo_ping_host_locked(dev_priv, SVGA_SYNC_GENERIC);
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mutex_unlock(&dev_priv->hw_mutex);
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} else
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schedule_work(&fman->ping_work);
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return true;
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}
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struct vmwgfx_wait_cb {
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struct fence_cb base;
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struct task_struct *task;
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};
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static void
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vmwgfx_wait_cb(struct fence *fence, struct fence_cb *cb)
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{
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struct vmwgfx_wait_cb *wait =
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container_of(cb, struct vmwgfx_wait_cb, base);
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wake_up_process(wait->task);
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}
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static void __vmw_fences_update(struct vmw_fence_manager *fman);
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static long vmw_fence_wait(struct fence *f, bool intr, signed long timeout)
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{
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struct vmw_fence_obj *fence =
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container_of(f, struct vmw_fence_obj, base);
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struct vmw_fence_manager *fman = fman_from_fence(fence);
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struct vmw_private *dev_priv = fman->dev_priv;
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struct vmwgfx_wait_cb cb;
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long ret = timeout;
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unsigned long irq_flags;
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if (likely(vmw_fence_obj_signaled(fence)))
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return timeout;
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vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
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vmw_seqno_waiter_add(dev_priv);
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spin_lock_irqsave(f->lock, irq_flags);
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if (intr && signal_pending(current)) {
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ret = -ERESTARTSYS;
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goto out;
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}
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cb.base.func = vmwgfx_wait_cb;
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cb.task = current;
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list_add(&cb.base.node, &f->cb_list);
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while (ret > 0) {
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__vmw_fences_update(fman);
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if (test_bit(FENCE_FLAG_SIGNALED_BIT, &f->flags))
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break;
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if (intr)
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__set_current_state(TASK_INTERRUPTIBLE);
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else
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__set_current_state(TASK_UNINTERRUPTIBLE);
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spin_unlock_irqrestore(f->lock, irq_flags);
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ret = schedule_timeout(ret);
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spin_lock_irqsave(f->lock, irq_flags);
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if (ret > 0 && intr && signal_pending(current))
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ret = -ERESTARTSYS;
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}
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if (!list_empty(&cb.base.node))
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list_del(&cb.base.node);
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__set_current_state(TASK_RUNNING);
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out:
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spin_unlock_irqrestore(f->lock, irq_flags);
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vmw_seqno_waiter_remove(dev_priv);
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return ret;
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}
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static struct fence_ops vmw_fence_ops = {
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.get_driver_name = vmw_fence_get_driver_name,
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.get_timeline_name = vmw_fence_get_timeline_name,
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.enable_signaling = vmw_fence_enable_signaling,
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.wait = vmw_fence_wait,
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.release = vmw_fence_obj_destroy,
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};
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/**
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* Execute signal actions on fences recently signaled.
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* This is done from a workqueue so we don't have to execute
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* signal actions from atomic context.
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*/
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static void vmw_fence_work_func(struct work_struct *work)
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{
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struct vmw_fence_manager *fman =
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container_of(work, struct vmw_fence_manager, work);
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struct list_head list;
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struct vmw_fence_action *action, *next_action;
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bool seqno_valid;
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do {
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INIT_LIST_HEAD(&list);
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mutex_lock(&fman->goal_irq_mutex);
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spin_lock_irq(&fman->lock);
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list_splice_init(&fman->cleanup_list, &list);
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seqno_valid = fman->seqno_valid;
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spin_unlock_irq(&fman->lock);
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if (!seqno_valid && fman->goal_irq_on) {
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fman->goal_irq_on = false;
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vmw_goal_waiter_remove(fman->dev_priv);
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}
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mutex_unlock(&fman->goal_irq_mutex);
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if (list_empty(&list))
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return;
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/*
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* At this point, only we should be able to manipulate the
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* list heads of the actions we have on the private list.
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* hence fman::lock not held.
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*/
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list_for_each_entry_safe(action, next_action, &list, head) {
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list_del_init(&action->head);
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if (action->cleanup)
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action->cleanup(action);
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}
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} while (1);
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}
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struct vmw_fence_manager *vmw_fence_manager_init(struct vmw_private *dev_priv)
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{
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struct vmw_fence_manager *fman = kzalloc(sizeof(*fman), GFP_KERNEL);
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if (unlikely(fman == NULL))
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return NULL;
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fman->dev_priv = dev_priv;
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spin_lock_init(&fman->lock);
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INIT_LIST_HEAD(&fman->fence_list);
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INIT_LIST_HEAD(&fman->cleanup_list);
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INIT_WORK(&fman->work, &vmw_fence_work_func);
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INIT_WORK(&fman->ping_work, &vmw_fence_ping_func);
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fman->fifo_down = true;
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fman->user_fence_size = ttm_round_pot(sizeof(struct vmw_user_fence));
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fman->fence_size = ttm_round_pot(sizeof(struct vmw_fence_obj));
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fman->event_fence_action_size =
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ttm_round_pot(sizeof(struct vmw_event_fence_action));
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mutex_init(&fman->goal_irq_mutex);
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fman->ctx = fence_context_alloc(1);
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return fman;
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}
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void vmw_fence_manager_takedown(struct vmw_fence_manager *fman)
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{
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unsigned long irq_flags;
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bool lists_empty;
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(void) cancel_work_sync(&fman->work);
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(void) cancel_work_sync(&fman->ping_work);
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spin_lock_irqsave(&fman->lock, irq_flags);
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lists_empty = list_empty(&fman->fence_list) &&
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list_empty(&fman->cleanup_list);
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spin_unlock_irqrestore(&fman->lock, irq_flags);
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BUG_ON(!lists_empty);
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kfree(fman);
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}
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static int vmw_fence_obj_init(struct vmw_fence_manager *fman,
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struct vmw_fence_obj *fence, u32 seqno,
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void (*destroy) (struct vmw_fence_obj *fence))
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{
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unsigned long irq_flags;
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int ret = 0;
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fence_init(&fence->base, &vmw_fence_ops, &fman->lock,
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fman->ctx, seqno);
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INIT_LIST_HEAD(&fence->seq_passed_actions);
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fence->destroy = destroy;
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spin_lock_irqsave(&fman->lock, irq_flags);
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if (unlikely(fman->fifo_down)) {
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ret = -EBUSY;
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goto out_unlock;
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}
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list_add_tail(&fence->head, &fman->fence_list);
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++fman->num_fence_objects;
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out_unlock:
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spin_unlock_irqrestore(&fman->lock, irq_flags);
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return ret;
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}
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static void vmw_fences_perform_actions(struct vmw_fence_manager *fman,
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struct list_head *list)
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{
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struct vmw_fence_action *action, *next_action;
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list_for_each_entry_safe(action, next_action, list, head) {
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list_del_init(&action->head);
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fman->pending_actions[action->type]--;
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if (action->seq_passed != NULL)
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action->seq_passed(action);
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/*
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* Add the cleanup action to the cleanup list so that
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* it will be performed by a worker task.
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*/
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list_add_tail(&action->head, &fman->cleanup_list);
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}
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}
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/**
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* vmw_fence_goal_new_locked - Figure out a new device fence goal
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* seqno if needed.
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*
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* @fman: Pointer to a fence manager.
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* @passed_seqno: The seqno the device currently signals as passed.
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*
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* This function should be called with the fence manager lock held.
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* It is typically called when we have a new passed_seqno, and
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* we might need to update the fence goal. It checks to see whether
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* the current fence goal has already passed, and, in that case,
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* scans through all unsignaled fences to get the next fence object with an
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* action attached, and sets the seqno of that fence as a new fence goal.
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*
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* returns true if the device goal seqno was updated. False otherwise.
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*/
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static bool vmw_fence_goal_new_locked(struct vmw_fence_manager *fman,
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u32 passed_seqno)
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{
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u32 goal_seqno;
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__le32 __iomem *fifo_mem;
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struct vmw_fence_obj *fence;
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if (likely(!fman->seqno_valid))
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return false;
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fifo_mem = fman->dev_priv->mmio_virt;
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goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL);
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if (likely(passed_seqno - goal_seqno >= VMW_FENCE_WRAP))
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return false;
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fman->seqno_valid = false;
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list_for_each_entry(fence, &fman->fence_list, head) {
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if (!list_empty(&fence->seq_passed_actions)) {
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fman->seqno_valid = true;
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iowrite32(fence->base.seqno,
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fifo_mem + SVGA_FIFO_FENCE_GOAL);
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break;
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}
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}
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return true;
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}
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|
|
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/**
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* vmw_fence_goal_check_locked - Replace the device fence goal seqno if
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* needed.
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*
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* @fence: Pointer to a struct vmw_fence_obj the seqno of which should be
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* considered as a device fence goal.
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*
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* This function should be called with the fence manager lock held.
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* It is typically called when an action has been attached to a fence to
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* check whether the seqno of that fence should be used for a fence
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* goal interrupt. This is typically needed if the current fence goal is
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* invalid, or has a higher seqno than that of the current fence object.
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*
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* returns true if the device goal seqno was updated. False otherwise.
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*/
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static bool vmw_fence_goal_check_locked(struct vmw_fence_obj *fence)
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{
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struct vmw_fence_manager *fman = fman_from_fence(fence);
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u32 goal_seqno;
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__le32 __iomem *fifo_mem;
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|
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if (fence_is_signaled_locked(&fence->base))
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return false;
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fifo_mem = fman->dev_priv->mmio_virt;
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goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL);
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if (likely(fman->seqno_valid &&
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goal_seqno - fence->base.seqno < VMW_FENCE_WRAP))
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return false;
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iowrite32(fence->base.seqno, fifo_mem + SVGA_FIFO_FENCE_GOAL);
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fman->seqno_valid = true;
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return true;
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}
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static void __vmw_fences_update(struct vmw_fence_manager *fman)
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{
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struct vmw_fence_obj *fence, *next_fence;
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struct list_head action_list;
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bool needs_rerun;
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uint32_t seqno, new_seqno;
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__le32 __iomem *fifo_mem = fman->dev_priv->mmio_virt;
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|
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seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
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rerun:
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list_for_each_entry_safe(fence, next_fence, &fman->fence_list, head) {
|
|
if (seqno - fence->base.seqno < VMW_FENCE_WRAP) {
|
|
list_del_init(&fence->head);
|
|
fence_signal_locked(&fence->base);
|
|
INIT_LIST_HEAD(&action_list);
|
|
list_splice_init(&fence->seq_passed_actions,
|
|
&action_list);
|
|
vmw_fences_perform_actions(fman, &action_list);
|
|
} else
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Rerun if the fence goal seqno was updated, and the
|
|
* hardware might have raced with that update, so that
|
|
* we missed a fence_goal irq.
|
|
*/
|
|
|
|
needs_rerun = vmw_fence_goal_new_locked(fman, seqno);
|
|
if (unlikely(needs_rerun)) {
|
|
new_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
|
|
if (new_seqno != seqno) {
|
|
seqno = new_seqno;
|
|
goto rerun;
|
|
}
|
|
}
|
|
|
|
if (!list_empty(&fman->cleanup_list))
|
|
(void) schedule_work(&fman->work);
|
|
}
|
|
|
|
void vmw_fences_update(struct vmw_fence_manager *fman)
|
|
{
|
|
unsigned long irq_flags;
|
|
|
|
spin_lock_irqsave(&fman->lock, irq_flags);
|
|
__vmw_fences_update(fman);
|
|
spin_unlock_irqrestore(&fman->lock, irq_flags);
|
|
}
|
|
|
|
bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence)
|
|
{
|
|
struct vmw_fence_manager *fman = fman_from_fence(fence);
|
|
|
|
if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->base.flags))
|
|
return 1;
|
|
|
|
vmw_fences_update(fman);
|
|
|
|
return fence_is_signaled(&fence->base);
|
|
}
|
|
|
|
int vmw_fence_obj_wait(struct vmw_fence_obj *fence, bool lazy,
|
|
bool interruptible, unsigned long timeout)
|
|
{
|
|
long ret = fence_wait_timeout(&fence->base, interruptible, timeout);
|
|
|
|
if (likely(ret > 0))
|
|
return 0;
|
|
else if (ret == 0)
|
|
return -EBUSY;
|
|
else
|
|
return ret;
|
|
}
|
|
|
|
void vmw_fence_obj_flush(struct vmw_fence_obj *fence)
|
|
{
|
|
struct vmw_private *dev_priv = fman_from_fence(fence)->dev_priv;
|
|
|
|
vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
|
|
}
|
|
|
|
static void vmw_fence_destroy(struct vmw_fence_obj *fence)
|
|
{
|
|
fence_free(&fence->base);
|
|
}
|
|
|
|
int vmw_fence_create(struct vmw_fence_manager *fman,
|
|
uint32_t seqno,
|
|
struct vmw_fence_obj **p_fence)
|
|
{
|
|
struct vmw_fence_obj *fence;
|
|
int ret;
|
|
|
|
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
|
|
if (unlikely(fence == NULL))
|
|
return -ENOMEM;
|
|
|
|
ret = vmw_fence_obj_init(fman, fence, seqno,
|
|
vmw_fence_destroy);
|
|
if (unlikely(ret != 0))
|
|
goto out_err_init;
|
|
|
|
*p_fence = fence;
|
|
return 0;
|
|
|
|
out_err_init:
|
|
kfree(fence);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void vmw_user_fence_destroy(struct vmw_fence_obj *fence)
|
|
{
|
|
struct vmw_user_fence *ufence =
|
|
container_of(fence, struct vmw_user_fence, fence);
|
|
struct vmw_fence_manager *fman = fman_from_fence(fence);
|
|
|
|
ttm_base_object_kfree(ufence, base);
|
|
/*
|
|
* Free kernel space accounting.
|
|
*/
|
|
ttm_mem_global_free(vmw_mem_glob(fman->dev_priv),
|
|
fman->user_fence_size);
|
|
}
|
|
|
|
static void vmw_user_fence_base_release(struct ttm_base_object **p_base)
|
|
{
|
|
struct ttm_base_object *base = *p_base;
|
|
struct vmw_user_fence *ufence =
|
|
container_of(base, struct vmw_user_fence, base);
|
|
struct vmw_fence_obj *fence = &ufence->fence;
|
|
|
|
*p_base = NULL;
|
|
vmw_fence_obj_unreference(&fence);
|
|
}
|
|
|
|
int vmw_user_fence_create(struct drm_file *file_priv,
|
|
struct vmw_fence_manager *fman,
|
|
uint32_t seqno,
|
|
struct vmw_fence_obj **p_fence,
|
|
uint32_t *p_handle)
|
|
{
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
struct vmw_user_fence *ufence;
|
|
struct vmw_fence_obj *tmp;
|
|
struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv);
|
|
int ret;
|
|
|
|
/*
|
|
* Kernel memory space accounting, since this object may
|
|
* be created by a user-space request.
|
|
*/
|
|
|
|
ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size,
|
|
false, false);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ufence = kzalloc(sizeof(*ufence), GFP_KERNEL);
|
|
if (unlikely(ufence == NULL)) {
|
|
ret = -ENOMEM;
|
|
goto out_no_object;
|
|
}
|
|
|
|
ret = vmw_fence_obj_init(fman, &ufence->fence, seqno,
|
|
vmw_user_fence_destroy);
|
|
if (unlikely(ret != 0)) {
|
|
kfree(ufence);
|
|
goto out_no_object;
|
|
}
|
|
|
|
/*
|
|
* The base object holds a reference which is freed in
|
|
* vmw_user_fence_base_release.
|
|
*/
|
|
tmp = vmw_fence_obj_reference(&ufence->fence);
|
|
ret = ttm_base_object_init(tfile, &ufence->base, false,
|
|
VMW_RES_FENCE,
|
|
&vmw_user_fence_base_release, NULL);
|
|
|
|
|
|
if (unlikely(ret != 0)) {
|
|
/*
|
|
* Free the base object's reference
|
|
*/
|
|
vmw_fence_obj_unreference(&tmp);
|
|
goto out_err;
|
|
}
|
|
|
|
*p_fence = &ufence->fence;
|
|
*p_handle = ufence->base.hash.key;
|
|
|
|
return 0;
|
|
out_err:
|
|
tmp = &ufence->fence;
|
|
vmw_fence_obj_unreference(&tmp);
|
|
out_no_object:
|
|
ttm_mem_global_free(mem_glob, fman->user_fence_size);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_fence_fifo_down - signal all unsignaled fence objects.
|
|
*/
|
|
|
|
void vmw_fence_fifo_down(struct vmw_fence_manager *fman)
|
|
{
|
|
struct list_head action_list;
|
|
int ret;
|
|
|
|
/*
|
|
* The list may be altered while we traverse it, so always
|
|
* restart when we've released the fman->lock.
|
|
*/
|
|
|
|
spin_lock_irq(&fman->lock);
|
|
fman->fifo_down = true;
|
|
while (!list_empty(&fman->fence_list)) {
|
|
struct vmw_fence_obj *fence =
|
|
list_entry(fman->fence_list.prev, struct vmw_fence_obj,
|
|
head);
|
|
fence_get(&fence->base);
|
|
spin_unlock_irq(&fman->lock);
|
|
|
|
ret = vmw_fence_obj_wait(fence, false, false,
|
|
VMW_FENCE_WAIT_TIMEOUT);
|
|
|
|
if (unlikely(ret != 0)) {
|
|
list_del_init(&fence->head);
|
|
fence_signal(&fence->base);
|
|
INIT_LIST_HEAD(&action_list);
|
|
list_splice_init(&fence->seq_passed_actions,
|
|
&action_list);
|
|
vmw_fences_perform_actions(fman, &action_list);
|
|
}
|
|
|
|
BUG_ON(!list_empty(&fence->head));
|
|
fence_put(&fence->base);
|
|
spin_lock_irq(&fman->lock);
|
|
}
|
|
spin_unlock_irq(&fman->lock);
|
|
}
|
|
|
|
void vmw_fence_fifo_up(struct vmw_fence_manager *fman)
|
|
{
|
|
unsigned long irq_flags;
|
|
|
|
spin_lock_irqsave(&fman->lock, irq_flags);
|
|
fman->fifo_down = false;
|
|
spin_unlock_irqrestore(&fman->lock, irq_flags);
|
|
}
|
|
|
|
|
|
int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_vmw_fence_wait_arg *arg =
|
|
(struct drm_vmw_fence_wait_arg *)data;
|
|
unsigned long timeout;
|
|
struct ttm_base_object *base;
|
|
struct vmw_fence_obj *fence;
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
int ret;
|
|
uint64_t wait_timeout = ((uint64_t)arg->timeout_us * HZ);
|
|
|
|
/*
|
|
* 64-bit division not present on 32-bit systems, so do an
|
|
* approximation. (Divide by 1000000).
|
|
*/
|
|
|
|
wait_timeout = (wait_timeout >> 20) + (wait_timeout >> 24) -
|
|
(wait_timeout >> 26);
|
|
|
|
if (!arg->cookie_valid) {
|
|
arg->cookie_valid = 1;
|
|
arg->kernel_cookie = jiffies + wait_timeout;
|
|
}
|
|
|
|
base = ttm_base_object_lookup(tfile, arg->handle);
|
|
if (unlikely(base == NULL)) {
|
|
printk(KERN_ERR "Wait invalid fence object handle "
|
|
"0x%08lx.\n",
|
|
(unsigned long)arg->handle);
|
|
return -EINVAL;
|
|
}
|
|
|
|
fence = &(container_of(base, struct vmw_user_fence, base)->fence);
|
|
|
|
timeout = jiffies;
|
|
if (time_after_eq(timeout, (unsigned long)arg->kernel_cookie)) {
|
|
ret = ((vmw_fence_obj_signaled(fence)) ?
|
|
0 : -EBUSY);
|
|
goto out;
|
|
}
|
|
|
|
timeout = (unsigned long)arg->kernel_cookie - timeout;
|
|
|
|
ret = vmw_fence_obj_wait(fence, arg->lazy, true, timeout);
|
|
|
|
out:
|
|
ttm_base_object_unref(&base);
|
|
|
|
/*
|
|
* Optionally unref the fence object.
|
|
*/
|
|
|
|
if (ret == 0 && (arg->wait_options & DRM_VMW_WAIT_OPTION_UNREF))
|
|
return ttm_ref_object_base_unref(tfile, arg->handle,
|
|
TTM_REF_USAGE);
|
|
return ret;
|
|
}
|
|
|
|
int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_vmw_fence_signaled_arg *arg =
|
|
(struct drm_vmw_fence_signaled_arg *) data;
|
|
struct ttm_base_object *base;
|
|
struct vmw_fence_obj *fence;
|
|
struct vmw_fence_manager *fman;
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
|
|
base = ttm_base_object_lookup(tfile, arg->handle);
|
|
if (unlikely(base == NULL)) {
|
|
printk(KERN_ERR "Fence signaled invalid fence object handle "
|
|
"0x%08lx.\n",
|
|
(unsigned long)arg->handle);
|
|
return -EINVAL;
|
|
}
|
|
|
|
fence = &(container_of(base, struct vmw_user_fence, base)->fence);
|
|
fman = fman_from_fence(fence);
|
|
|
|
arg->signaled = vmw_fence_obj_signaled(fence);
|
|
|
|
arg->signaled_flags = arg->flags;
|
|
spin_lock_irq(&fman->lock);
|
|
arg->passed_seqno = dev_priv->last_read_seqno;
|
|
spin_unlock_irq(&fman->lock);
|
|
|
|
ttm_base_object_unref(&base);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_vmw_fence_arg *arg =
|
|
(struct drm_vmw_fence_arg *) data;
|
|
|
|
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
|
|
arg->handle,
|
|
TTM_REF_USAGE);
|
|
}
|
|
|
|
/**
|
|
* vmw_event_fence_fpriv_gone - Remove references to struct drm_file objects
|
|
*
|
|
* @fman: Pointer to a struct vmw_fence_manager
|
|
* @event_list: Pointer to linked list of struct vmw_event_fence_action objects
|
|
* with pointers to a struct drm_file object about to be closed.
|
|
*
|
|
* This function removes all pending fence events with references to a
|
|
* specific struct drm_file object about to be closed. The caller is required
|
|
* to pass a list of all struct vmw_event_fence_action objects with such
|
|
* events attached. This function is typically called before the
|
|
* struct drm_file object's event management is taken down.
|
|
*/
|
|
void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman,
|
|
struct list_head *event_list)
|
|
{
|
|
struct vmw_event_fence_action *eaction;
|
|
struct drm_pending_event *event;
|
|
unsigned long irq_flags;
|
|
|
|
while (1) {
|
|
spin_lock_irqsave(&fman->lock, irq_flags);
|
|
if (list_empty(event_list))
|
|
goto out_unlock;
|
|
eaction = list_first_entry(event_list,
|
|
struct vmw_event_fence_action,
|
|
fpriv_head);
|
|
list_del_init(&eaction->fpriv_head);
|
|
event = eaction->event;
|
|
eaction->event = NULL;
|
|
spin_unlock_irqrestore(&fman->lock, irq_flags);
|
|
event->destroy(event);
|
|
}
|
|
out_unlock:
|
|
spin_unlock_irqrestore(&fman->lock, irq_flags);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_event_fence_action_seq_passed
|
|
*
|
|
* @action: The struct vmw_fence_action embedded in a struct
|
|
* vmw_event_fence_action.
|
|
*
|
|
* This function is called when the seqno of the fence where @action is
|
|
* attached has passed. It queues the event on the submitter's event list.
|
|
* This function is always called from atomic context, and may be called
|
|
* from irq context.
|
|
*/
|
|
static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action)
|
|
{
|
|
struct vmw_event_fence_action *eaction =
|
|
container_of(action, struct vmw_event_fence_action, action);
|
|
struct drm_device *dev = eaction->dev;
|
|
struct drm_pending_event *event = eaction->event;
|
|
struct drm_file *file_priv;
|
|
unsigned long irq_flags;
|
|
|
|
if (unlikely(event == NULL))
|
|
return;
|
|
|
|
file_priv = event->file_priv;
|
|
spin_lock_irqsave(&dev->event_lock, irq_flags);
|
|
|
|
if (likely(eaction->tv_sec != NULL)) {
|
|
struct timeval tv;
|
|
|
|
do_gettimeofday(&tv);
|
|
*eaction->tv_sec = tv.tv_sec;
|
|
*eaction->tv_usec = tv.tv_usec;
|
|
}
|
|
|
|
list_del_init(&eaction->fpriv_head);
|
|
list_add_tail(&eaction->event->link, &file_priv->event_list);
|
|
eaction->event = NULL;
|
|
wake_up_all(&file_priv->event_wait);
|
|
spin_unlock_irqrestore(&dev->event_lock, irq_flags);
|
|
}
|
|
|
|
/**
|
|
* vmw_event_fence_action_cleanup
|
|
*
|
|
* @action: The struct vmw_fence_action embedded in a struct
|
|
* vmw_event_fence_action.
|
|
*
|
|
* This function is the struct vmw_fence_action destructor. It's typically
|
|
* called from a workqueue.
|
|
*/
|
|
static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action)
|
|
{
|
|
struct vmw_event_fence_action *eaction =
|
|
container_of(action, struct vmw_event_fence_action, action);
|
|
struct vmw_fence_manager *fman = fman_from_fence(eaction->fence);
|
|
unsigned long irq_flags;
|
|
|
|
spin_lock_irqsave(&fman->lock, irq_flags);
|
|
list_del(&eaction->fpriv_head);
|
|
spin_unlock_irqrestore(&fman->lock, irq_flags);
|
|
|
|
vmw_fence_obj_unreference(&eaction->fence);
|
|
kfree(eaction);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_fence_obj_add_action - Add an action to a fence object.
|
|
*
|
|
* @fence - The fence object.
|
|
* @action - The action to add.
|
|
*
|
|
* Note that the action callbacks may be executed before this function
|
|
* returns.
|
|
*/
|
|
static void vmw_fence_obj_add_action(struct vmw_fence_obj *fence,
|
|
struct vmw_fence_action *action)
|
|
{
|
|
struct vmw_fence_manager *fman = fman_from_fence(fence);
|
|
unsigned long irq_flags;
|
|
bool run_update = false;
|
|
|
|
mutex_lock(&fman->goal_irq_mutex);
|
|
spin_lock_irqsave(&fman->lock, irq_flags);
|
|
|
|
fman->pending_actions[action->type]++;
|
|
if (fence_is_signaled_locked(&fence->base)) {
|
|
struct list_head action_list;
|
|
|
|
INIT_LIST_HEAD(&action_list);
|
|
list_add_tail(&action->head, &action_list);
|
|
vmw_fences_perform_actions(fman, &action_list);
|
|
} else {
|
|
list_add_tail(&action->head, &fence->seq_passed_actions);
|
|
|
|
/*
|
|
* This function may set fman::seqno_valid, so it must
|
|
* be run with the goal_irq_mutex held.
|
|
*/
|
|
run_update = vmw_fence_goal_check_locked(fence);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&fman->lock, irq_flags);
|
|
|
|
if (run_update) {
|
|
if (!fman->goal_irq_on) {
|
|
fman->goal_irq_on = true;
|
|
vmw_goal_waiter_add(fman->dev_priv);
|
|
}
|
|
vmw_fences_update(fman);
|
|
}
|
|
mutex_unlock(&fman->goal_irq_mutex);
|
|
|
|
}
|
|
|
|
/**
|
|
* vmw_event_fence_action_create - Post an event for sending when a fence
|
|
* object seqno has passed.
|
|
*
|
|
* @file_priv: The file connection on which the event should be posted.
|
|
* @fence: The fence object on which to post the event.
|
|
* @event: Event to be posted. This event should've been alloced
|
|
* using k[mz]alloc, and should've been completely initialized.
|
|
* @interruptible: Interruptible waits if possible.
|
|
*
|
|
* As a side effect, the object pointed to by @event may have been
|
|
* freed when this function returns. If this function returns with
|
|
* an error code, the caller needs to free that object.
|
|
*/
|
|
|
|
int vmw_event_fence_action_queue(struct drm_file *file_priv,
|
|
struct vmw_fence_obj *fence,
|
|
struct drm_pending_event *event,
|
|
uint32_t *tv_sec,
|
|
uint32_t *tv_usec,
|
|
bool interruptible)
|
|
{
|
|
struct vmw_event_fence_action *eaction;
|
|
struct vmw_fence_manager *fman = fman_from_fence(fence);
|
|
struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
|
|
unsigned long irq_flags;
|
|
|
|
eaction = kzalloc(sizeof(*eaction), GFP_KERNEL);
|
|
if (unlikely(eaction == NULL))
|
|
return -ENOMEM;
|
|
|
|
eaction->event = event;
|
|
|
|
eaction->action.seq_passed = vmw_event_fence_action_seq_passed;
|
|
eaction->action.cleanup = vmw_event_fence_action_cleanup;
|
|
eaction->action.type = VMW_ACTION_EVENT;
|
|
|
|
eaction->fence = vmw_fence_obj_reference(fence);
|
|
eaction->dev = fman->dev_priv->dev;
|
|
eaction->tv_sec = tv_sec;
|
|
eaction->tv_usec = tv_usec;
|
|
|
|
spin_lock_irqsave(&fman->lock, irq_flags);
|
|
list_add_tail(&eaction->fpriv_head, &vmw_fp->fence_events);
|
|
spin_unlock_irqrestore(&fman->lock, irq_flags);
|
|
|
|
vmw_fence_obj_add_action(fence, &eaction->action);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct vmw_event_fence_pending {
|
|
struct drm_pending_event base;
|
|
struct drm_vmw_event_fence event;
|
|
};
|
|
|
|
static int vmw_event_fence_action_create(struct drm_file *file_priv,
|
|
struct vmw_fence_obj *fence,
|
|
uint32_t flags,
|
|
uint64_t user_data,
|
|
bool interruptible)
|
|
{
|
|
struct vmw_event_fence_pending *event;
|
|
struct vmw_fence_manager *fman = fman_from_fence(fence);
|
|
struct drm_device *dev = fman->dev_priv->dev;
|
|
unsigned long irq_flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&dev->event_lock, irq_flags);
|
|
|
|
ret = (file_priv->event_space < sizeof(event->event)) ? -EBUSY : 0;
|
|
if (likely(ret == 0))
|
|
file_priv->event_space -= sizeof(event->event);
|
|
|
|
spin_unlock_irqrestore(&dev->event_lock, irq_flags);
|
|
|
|
if (unlikely(ret != 0)) {
|
|
DRM_ERROR("Failed to allocate event space for this file.\n");
|
|
goto out_no_space;
|
|
}
|
|
|
|
|
|
event = kzalloc(sizeof(*event), GFP_KERNEL);
|
|
if (unlikely(event == NULL)) {
|
|
DRM_ERROR("Failed to allocate an event.\n");
|
|
ret = -ENOMEM;
|
|
goto out_no_event;
|
|
}
|
|
|
|
event->event.base.type = DRM_VMW_EVENT_FENCE_SIGNALED;
|
|
event->event.base.length = sizeof(*event);
|
|
event->event.user_data = user_data;
|
|
|
|
event->base.event = &event->event.base;
|
|
event->base.file_priv = file_priv;
|
|
event->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
|
|
|
|
|
|
if (flags & DRM_VMW_FE_FLAG_REQ_TIME)
|
|
ret = vmw_event_fence_action_queue(file_priv, fence,
|
|
&event->base,
|
|
&event->event.tv_sec,
|
|
&event->event.tv_usec,
|
|
interruptible);
|
|
else
|
|
ret = vmw_event_fence_action_queue(file_priv, fence,
|
|
&event->base,
|
|
NULL,
|
|
NULL,
|
|
interruptible);
|
|
if (ret != 0)
|
|
goto out_no_queue;
|
|
|
|
return 0;
|
|
|
|
out_no_queue:
|
|
event->base.destroy(&event->base);
|
|
out_no_event:
|
|
spin_lock_irqsave(&dev->event_lock, irq_flags);
|
|
file_priv->event_space += sizeof(*event);
|
|
spin_unlock_irqrestore(&dev->event_lock, irq_flags);
|
|
out_no_space:
|
|
return ret;
|
|
}
|
|
|
|
int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
struct drm_vmw_fence_event_arg *arg =
|
|
(struct drm_vmw_fence_event_arg *) data;
|
|
struct vmw_fence_obj *fence = NULL;
|
|
struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
|
|
struct drm_vmw_fence_rep __user *user_fence_rep =
|
|
(struct drm_vmw_fence_rep __user *)(unsigned long)
|
|
arg->fence_rep;
|
|
uint32_t handle;
|
|
int ret;
|
|
|
|
/*
|
|
* Look up an existing fence object,
|
|
* and if user-space wants a new reference,
|
|
* add one.
|
|
*/
|
|
if (arg->handle) {
|
|
struct ttm_base_object *base =
|
|
ttm_base_object_lookup_for_ref(dev_priv->tdev,
|
|
arg->handle);
|
|
|
|
if (unlikely(base == NULL)) {
|
|
DRM_ERROR("Fence event invalid fence object handle "
|
|
"0x%08lx.\n",
|
|
(unsigned long)arg->handle);
|
|
return -EINVAL;
|
|
}
|
|
fence = &(container_of(base, struct vmw_user_fence,
|
|
base)->fence);
|
|
(void) vmw_fence_obj_reference(fence);
|
|
|
|
if (user_fence_rep != NULL) {
|
|
bool existed;
|
|
|
|
ret = ttm_ref_object_add(vmw_fp->tfile, base,
|
|
TTM_REF_USAGE, &existed);
|
|
if (unlikely(ret != 0)) {
|
|
DRM_ERROR("Failed to reference a fence "
|
|
"object.\n");
|
|
goto out_no_ref_obj;
|
|
}
|
|
handle = base->hash.key;
|
|
}
|
|
ttm_base_object_unref(&base);
|
|
}
|
|
|
|
/*
|
|
* Create a new fence object.
|
|
*/
|
|
if (!fence) {
|
|
ret = vmw_execbuf_fence_commands(file_priv, dev_priv,
|
|
&fence,
|
|
(user_fence_rep) ?
|
|
&handle : NULL);
|
|
if (unlikely(ret != 0)) {
|
|
DRM_ERROR("Fence event failed to create fence.\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
BUG_ON(fence == NULL);
|
|
|
|
ret = vmw_event_fence_action_create(file_priv, fence,
|
|
arg->flags,
|
|
arg->user_data,
|
|
true);
|
|
if (unlikely(ret != 0)) {
|
|
if (ret != -ERESTARTSYS)
|
|
DRM_ERROR("Failed to attach event to fence.\n");
|
|
goto out_no_create;
|
|
}
|
|
|
|
vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence,
|
|
handle);
|
|
vmw_fence_obj_unreference(&fence);
|
|
return 0;
|
|
out_no_create:
|
|
if (user_fence_rep != NULL)
|
|
ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
|
|
handle, TTM_REF_USAGE);
|
|
out_no_ref_obj:
|
|
vmw_fence_obj_unreference(&fence);
|
|
return ret;
|
|
}
|