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vmwgfx: Add fence events 

Add a way to send DRM events down the gpu fifo by attaching them to
fence objects. This may be useful for Xserver swapbuffer throttling and
page-flip done notifications.

Bump version to 2.2 to signal the availability of the FENCE_EVENT ioctl.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2011-10-10 12:23:26 +02:00 committed by Dave Airlie
parent 8bf445cee3
commit 57c5ee79ac
8 changed files with 644 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -94,6 +94,9 @@
#define DRM_IOCTL_VMW_FENCE_UNREF \
DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_FENCE_UNREF, \
struct drm_vmw_fence_arg)
#define DRM_IOCTL_VMW_FENCE_EVENT \
DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_FENCE_EVENT, \
struct drm_vmw_fence_event_arg)
#define DRM_IOCTL_VMW_PRESENT \
DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_PRESENT, \
struct drm_vmw_present_arg)
@ -150,6 +153,9 @@ static struct drm_ioctl_desc vmw_ioctls[] = {
DRM_AUTH | DRM_UNLOCKED),
VMW_IOCTL_DEF(VMW_FENCE_UNREF, vmw_fence_obj_unref_ioctl,
DRM_AUTH | DRM_UNLOCKED),
VMW_IOCTL_DEF(VMW_FENCE_EVENT,
vmw_fence_event_ioctl,
DRM_AUTH | DRM_UNLOCKED),
VMW_IOCTL_DEF(VMW_GET_3D_CAP, vmw_get_cap_3d_ioctl,
DRM_AUTH | DRM_UNLOCKED),

16
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -40,9 +40,9 @@
#include "ttm/ttm_module.h"
#include "vmwgfx_fence.h"
#define VMWGFX_DRIVER_DATE "20110927"
#define VMWGFX_DRIVER_DATE "20111008"
#define VMWGFX_DRIVER_MAJOR 2
#define VMWGFX_DRIVER_MINOR 1
#define VMWGFX_DRIVER_MINOR 2
#define VMWGFX_DRIVER_PATCHLEVEL 0
#define VMWGFX_FILE_PAGE_OFFSET 0x00100000
#define VMWGFX_FIFO_STATIC_SIZE (1024*1024)
@ -264,10 +264,12 @@ struct vmw_private {
wait_queue_head_t fence_queue;
wait_queue_head_t fifo_queue;
int fence_queue_waiters; /* Protected by hw_mutex */
int goal_queue_waiters; /* Protected by hw_mutex */
atomic_t fifo_queue_waiters;
uint32_t last_read_seqno;
spinlock_t irq_lock;
struct vmw_fence_manager *fman;
uint32_t irq_mask;
/*
* Device state
@ -532,7 +534,13 @@ extern int vmw_execbuf_fence_commands(struct drm_file *file_priv,
struct vmw_private *dev_priv,
struct vmw_fence_obj **p_fence,
uint32_t *p_handle);
extern void vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
struct vmw_fpriv *vmw_fp,
int ret,
struct drm_vmw_fence_rep __user
*user_fence_rep,
struct vmw_fence_obj *fence,
uint32_t fence_handle);
/**
* IRQs and wating - vmwgfx_irq.c
@ -557,6 +565,8 @@ extern void vmw_update_seqno(struct vmw_private *dev_priv,
struct vmw_fifo_state *fifo_state);
extern void vmw_seqno_waiter_add(struct vmw_private *dev_priv);
extern void vmw_seqno_waiter_remove(struct vmw_private *dev_priv);
extern void vmw_goal_waiter_add(struct vmw_private *dev_priv);
extern void vmw_goal_waiter_remove(struct vmw_private *dev_priv);
/**
* Rudimentary fence-like objects currently used only for throttling -

2
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
View File

@ -1057,7 +1057,7 @@ int vmw_execbuf_fence_commands(struct drm_file *file_priv,
* object so we wait for it immediately, and then unreference the
* user-space reference.
*/
static void
void
vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
struct vmw_fpriv *vmw_fp,
int ret,

533
drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
View File

@ -34,13 +34,18 @@ struct vmw_fence_manager {
int num_fence_objects;
struct vmw_private *dev_priv;
spinlock_t lock;
u32 next_seqno;
struct list_head fence_list;
struct work_struct work;
u32 user_fence_size;
u32 fence_size;
u32 event_fence_action_size;
bool fifo_down;
struct list_head cleanup_list;
uint32_t pending_actions[VMW_ACTION_MAX];
struct mutex goal_irq_mutex;
bool goal_irq_on; /* Protected by @goal_irq_mutex */
bool seqno_valid; /* Protected by @lock, and may not be set to true
without the @goal_irq_mutex held. */
};
struct vmw_user_fence {
@ -49,8 +54,51 @@ struct vmw_user_fence {
};
/**
* vmw_fence_destroy_locked
* struct vmw_event_fence_action - fence action that delivers a drm event.
*
* @e: A struct drm_pending_event that controls the event delivery.
* @action: A struct vmw_fence_action to hook up to a fence.
* @fence: A referenced pointer to the fence to keep it alive while @action
* hangs on it.
* @dev: Pointer to a struct drm_device so we can access the event stuff.
* @kref: Both @e and @action has destructors, so we need to refcount.
* @size: Size accounted for this object.
* @tv_sec: If non-null, the variable pointed to will be assigned
* current time tv_sec val when the fence signals.
* @tv_usec: Must be set if @tv_sec is set, and the variable pointed to will
* be assigned the current time tv_usec val when the fence signals.
*/
struct vmw_event_fence_action {
struct drm_pending_event e;
struct vmw_fence_action action;
struct vmw_fence_obj *fence;
struct drm_device *dev;
struct kref kref;
uint32_t size;
uint32_t *tv_sec;
uint32_t *tv_usec;
};
/**
* Note on fencing subsystem usage of irqs:
* Typically the vmw_fences_update function is called
*
* a) When a new fence seqno has been submitted by the fifo code.
* b) On-demand when we have waiters. Sleeping waiters will switch on the
* ANY_FENCE irq and call vmw_fences_update function each time an ANY_FENCE
* irq is received. When the last fence waiter is gone, that IRQ is masked
* away.
*
* In situations where there are no waiters and we don't submit any new fences,
* fence objects may not be signaled. This is perfectly OK, since there are
* no consumers of the signaled data, but that is NOT ok when there are fence
* actions attached to a fence. The fencing subsystem then makes use of the
* FENCE_GOAL irq and sets the fence goal seqno to that of the next fence
* which has an action attached, and each time vmw_fences_update is called,
* the subsystem makes sure the fence goal seqno is updated.
*
* The fence goal seqno irq is on as long as there are unsignaled fence
* objects with actions attached to them.
*/
static void vmw_fence_obj_destroy_locked(struct kref *kref)
@ -85,24 +133,36 @@ static void vmw_fence_work_func(struct work_struct *work)
container_of(work, struct vmw_fence_manager, work);
struct list_head list;
struct vmw_fence_action *action, *next_action;
bool seqno_valid;
do {
INIT_LIST_HEAD(&list);
mutex_lock(&fman->goal_irq_mutex);
spin_lock_irq(&fman->lock);
list_splice_init(&fman->cleanup_list, &list);
seqno_valid = fman->seqno_valid;
spin_unlock_irq(&fman->lock);
if (!seqno_valid && fman->goal_irq_on) {
fman->goal_irq_on = false;
vmw_goal_waiter_remove(fman->dev_priv);
}
mutex_unlock(&fman->goal_irq_mutex);
if (list_empty(&list))
return;
/*
* At this point, only we should be able to manipulate the
* list heads of the actions we have on the private list.
* hence fman::lock not held.
*/
list_for_each_entry_safe(action, next_action, &list, head) {
list_del_init(&action->head);
action->cleanup(action);
if (action->cleanup)
action->cleanup(action);
}
} while (1);
}
@ -122,6 +182,9 @@ struct vmw_fence_manager *vmw_fence_manager_init(struct vmw_private *dev_priv)
fman->fifo_down = true;
fman->user_fence_size = ttm_round_pot(sizeof(struct vmw_user_fence));
fman->fence_size = ttm_round_pot(sizeof(struct vmw_fence_obj));
fman->event_fence_action_size =
ttm_round_pot(sizeof(struct vmw_event_fence_action));
mutex_init(&fman->goal_irq_mutex);
return fman;
}
@ -214,6 +277,7 @@ void vmw_fences_perform_actions(struct vmw_fence_manager *fman,
list_for_each_entry_safe(action, next_action, list, head) {
list_del_init(&action->head);
fman->pending_actions[action->type]--;
if (action->seq_passed != NULL)
action->seq_passed(action);
@ -222,17 +286,101 @@ void vmw_fences_perform_actions(struct vmw_fence_manager *fman,
* it will be performed by a worker task.
*/
if (action->cleanup != NULL)
list_add_tail(&action->head, &fman->cleanup_list);
list_add_tail(&action->head, &fman->cleanup_list);
}
}
void vmw_fences_update(struct vmw_fence_manager *fman, u32 seqno)
/**
* vmw_fence_goal_new_locked - Figure out a new device fence goal
* seqno if needed.
*
* @fman: Pointer to a fence manager.
* @passed_seqno: The seqno the device currently signals as passed.
*
* This function should be called with the fence manager lock held.
* It is typically called when we have a new passed_seqno, and
* we might need to update the fence goal. It checks to see whether
* the current fence goal has already passed, and, in that case,
* scans through all unsignaled fences to get the next fence object with an
* action attached, and sets the seqno of that fence as a new fence goal.
*
* returns true if the device goal seqno was updated. False otherwise.
*/
static bool vmw_fence_goal_new_locked(struct vmw_fence_manager *fman,
u32 passed_seqno)
{
u32 goal_seqno;
__le32 __iomem *fifo_mem;
struct vmw_fence_obj *fence;
if (likely(!fman->seqno_valid))
return false;
fifo_mem = fman->dev_priv->mmio_virt;
goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL);
if (likely(passed_seqno - goal_seqno >= VMW_FENCE_WRAP))
return false;
fman->seqno_valid = false;
list_for_each_entry(fence, &fman->fence_list, head) {
if (!list_empty(&fence->seq_passed_actions)) {
fman->seqno_valid = true;
iowrite32(fence->seqno,
fifo_mem + SVGA_FIFO_FENCE_GOAL);
break;
}
}
return true;
}
/**
* vmw_fence_goal_check_locked - Replace the device fence goal seqno if
* needed.
*
* @fence: Pointer to a struct vmw_fence_obj the seqno of which should be
* considered as a device fence goal.
*
* This function should be called with the fence manager lock held.
* It is typically called when an action has been attached to a fence to
* check whether the seqno of that fence should be used for a fence
* goal interrupt. This is typically needed if the current fence goal is
* invalid, or has a higher seqno than that of the current fence object.
*
* returns true if the device goal seqno was updated. False otherwise.
*/
static bool vmw_fence_goal_check_locked(struct vmw_fence_obj *fence)
{
u32 goal_seqno;
__le32 __iomem *fifo_mem;
if (fence->signaled & DRM_VMW_FENCE_FLAG_EXEC)
return false;
fifo_mem = fence->fman->dev_priv->mmio_virt;
goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL);
if (likely(fence->fman->seqno_valid &&
goal_seqno - fence->seqno < VMW_FENCE_WRAP))
return false;
iowrite32(fence->seqno, fifo_mem + SVGA_FIFO_FENCE_GOAL);
fence->fman->seqno_valid = true;
return true;
}
void vmw_fences_update(struct vmw_fence_manager *fman)
{
unsigned long flags;
struct vmw_fence_obj *fence, *next_fence;
struct list_head action_list;
bool needs_rerun;
uint32_t seqno, new_seqno;
__le32 __iomem *fifo_mem = fman->dev_priv->mmio_virt;
seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
rerun:
spin_lock_irqsave(&fman->lock, flags);
list_for_each_entry_safe(fence, next_fence, &fman->fence_list, head) {
if (seqno - fence->seqno < VMW_FENCE_WRAP) {
@ -243,14 +391,30 @@ void vmw_fences_update(struct vmw_fence_manager *fman, u32 seqno)
&action_list);
vmw_fences_perform_actions(fman, &action_list);
wake_up_all(&fence->queue);
}
} else
break;
}
needs_rerun = vmw_fence_goal_new_locked(fman, seqno);
if (!list_empty(&fman->cleanup_list))
(void) schedule_work(&fman->work);
spin_unlock_irqrestore(&fman->lock, flags);
}
/*
* 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.
*/
if (unlikely(needs_rerun)) {
new_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
if (new_seqno != seqno) {
seqno = new_seqno;
goto rerun;
}
}
}
bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence,
uint32_t flags)
@ -267,14 +431,8 @@ bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence,
if ((signaled & flags) == flags)
return 1;
if ((signaled & DRM_VMW_FENCE_FLAG_EXEC) == 0) {
struct vmw_private *dev_priv = fman->dev_priv;
__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
u32 seqno;
seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
vmw_fences_update(fman, seqno);
}
if ((signaled & DRM_VMW_FENCE_FLAG_EXEC) == 0)
vmw_fences_update(fman);
spin_lock_irqsave(&fman->lock, irq_flags);
signaled = fence->signaled;
@ -624,3 +782,344 @@ int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
arg->handle,
TTM_REF_USAGE);
}
/**
* vmw_event_fence_action_destroy
*
* @kref: The struct kref embedded in a struct vmw_event_fence_action.
*
* The vmw_event_fence_action destructor that may be called either after
* the fence action cleanup, or when the event is delivered.
* It frees both the vmw_event_fence_action struct and the actual
* event structure copied to user-space.
*/
static void vmw_event_fence_action_destroy(struct kref *kref)
{
struct vmw_event_fence_action *eaction =
container_of(kref, struct vmw_event_fence_action, kref);
struct ttm_mem_global *mem_glob =
vmw_mem_glob(vmw_priv(eaction->dev));
uint32_t size = eaction->size;
kfree(eaction->e.event);
kfree(eaction);
ttm_mem_global_free(mem_glob, size);
}
/**
* vmw_event_fence_action_delivered
*
* @e: The struct drm_pending_event embedded in a struct
* vmw_event_fence_action.
*
* The struct drm_pending_event destructor that is called by drm
* once the event is delivered. Since we don't know whether this function
* will be called before or after the fence action destructor, we
* free a refcount and destroy if it becomes zero.
*/
static void vmw_event_fence_action_delivered(struct drm_pending_event *e)
{
struct vmw_event_fence_action *eaction =
container_of(e, struct vmw_event_fence_action, e);
kref_put(&eaction->kref, vmw_event_fence_action_destroy);
}
/**
* 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. It ups a refcount reflecting that we now have two
* destructors.
*/
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_file *file_priv = eaction->e.file_priv;
unsigned long irq_flags;
kref_get(&eaction->kref);
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_add_tail(&eaction->e.link, &file_priv->event_list);
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);
vmw_fence_obj_unreference(&eaction->fence);
kref_put(&eaction->kref, vmw_event_fence_action_destroy);
}
/**
* 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.
*/
void vmw_fence_obj_add_action(struct vmw_fence_obj *fence,
struct vmw_fence_action *action)
{
struct vmw_fence_manager *fman = fence->fman;
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->signaled & DRM_VMW_FENCE_FLAG_EXEC) {
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_create(struct drm_file *file_priv,
struct vmw_fence_obj *fence,
struct drm_event *event,
uint32_t *tv_sec,
uint32_t *tv_usec,
bool interruptible)
{
struct vmw_event_fence_action *eaction =
kzalloc(sizeof(*eaction), GFP_KERNEL);
struct ttm_mem_global *mem_glob =
vmw_mem_glob(fence->fman->dev_priv);
struct vmw_fence_manager *fman = fence->fman;
uint32_t size = fman->event_fence_action_size +
ttm_round_pot(event->length);
int ret;
/*
* Account for internal structure size as well as the
* event size itself.
*/
ret = ttm_mem_global_alloc(mem_glob, size, false, interruptible);
if (unlikely(ret != 0))
return ret;
eaction = kzalloc(sizeof(*eaction), GFP_KERNEL);
if (unlikely(eaction == NULL)) {
ttm_mem_global_free(mem_glob, size);
return -ENOMEM;
}
eaction->e.event = event;
eaction->e.file_priv = file_priv;
eaction->e.destroy = vmw_event_fence_action_delivered;
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->size = size;
eaction->tv_sec = tv_sec;
eaction->tv_usec = tv_usec;
kref_init(&eaction->kref);
vmw_fence_obj_add_action(fence, &eaction->action);
return 0;
}
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;
unsigned long irq_flags;
struct drm_vmw_event_fence *event;
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(vmw_fp->tfile, 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);
spin_lock_irqsave(&dev->event_lock, irq_flags);
ret = (file_priv->event_space < sizeof(*event)) ? -EBUSY : 0;
if (likely(ret == 0))
file_priv->event_space -= sizeof(*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_event_space;
}
event = kzalloc(sizeof(*event), GFP_KERNEL);
if (unlikely(event == NULL)) {
DRM_ERROR("Failed to allocate an event.\n");
goto out_no_event;
}
event->base.type = DRM_VMW_EVENT_FENCE_SIGNALED;
event->base.length = sizeof(*event);
event->user_data = arg->user_data;
if (arg->flags & DRM_VMW_FE_FLAG_REQ_TIME)
ret = vmw_event_fence_action_create(file_priv, fence,
&event->base,
&event->tv_sec,
&event->tv_usec,
true);
else
ret = vmw_event_fence_action_create(file_priv, fence,
&event->base,
NULL,
NULL,
true);
if (unlikely(ret != 0)) {
if (ret != -ERESTARTSYS)
DRM_ERROR("Failed to attach event to fence.\n");
goto out_no_attach;
}
vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence,
handle);
vmw_fence_obj_unreference(&fence);
return 0;
out_no_attach:
kfree(event);
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_event_space:
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;
}

12
drivers/gpu/drm/vmwgfx/vmwgfx_fence.h
View File

@ -37,8 +37,14 @@ struct vmw_fence_manager;
*
*
*/
enum vmw_action_type {
VMW_ACTION_EVENT = 0,
VMW_ACTION_MAX
};
struct vmw_fence_action {
struct list_head head;
enum vmw_action_type type;
void (*seq_passed) (struct vmw_fence_action *action);
void (*cleanup) (struct vmw_fence_action *action);
};
@ -66,8 +72,7 @@ extern void vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p);
extern struct vmw_fence_obj *
vmw_fence_obj_reference(struct vmw_fence_obj *fence);
extern void vmw_fences_update(struct vmw_fence_manager *fman,
u32 sequence);
extern void vmw_fences_update(struct vmw_fence_manager *fman);
extern bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence,
uint32_t flags);
@ -102,4 +107,7 @@ extern int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
extern int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
#endif /* _VMWGFX_FENCE_H_ */

10
drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
View File

@ -247,9 +247,8 @@ static int vmw_fifo_wait(struct vmw_private *dev_priv,
spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
outl(SVGA_IRQFLAG_FIFO_PROGRESS,
dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
vmw_write(dev_priv, SVGA_REG_IRQMASK,
vmw_read(dev_priv, SVGA_REG_IRQMASK) |
SVGA_IRQFLAG_FIFO_PROGRESS);
dev_priv->irq_mask |= SVGA_IRQFLAG_FIFO_PROGRESS;
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
}
mutex_unlock(&dev_priv->hw_mutex);
@ -271,9 +270,8 @@ static int vmw_fifo_wait(struct vmw_private *dev_priv,
mutex_lock(&dev_priv->hw_mutex);
if (atomic_dec_and_test(&dev_priv->fifo_queue_waiters)) {
spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
vmw_write(dev_priv, SVGA_REG_IRQMASK,
vmw_read(dev_priv, SVGA_REG_IRQMASK) &
~SVGA_IRQFLAG_FIFO_PROGRESS);
dev_priv->irq_mask &= ~SVGA_IRQFLAG_FIFO_PROGRESS;
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
}
mutex_unlock(&dev_priv->hw_mutex);

67
drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
View File

@ -34,28 +34,30 @@ irqreturn_t vmw_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *)arg;
struct vmw_private *dev_priv = vmw_priv(dev);
uint32_t status;
uint32_t status, masked_status;
spin_lock(&dev_priv->irq_lock);
status = inl(dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
masked_status = status & dev_priv->irq_mask;
spin_unlock(&dev_priv->irq_lock);
if (status & SVGA_IRQFLAG_ANY_FENCE) {
__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
uint32_t seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
if (likely(status))
outl(status, dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
vmw_fences_update(dev_priv->fman, seqno);
if (!masked_status)
return IRQ_NONE;
if (masked_status & (SVGA_IRQFLAG_ANY_FENCE |
SVGA_IRQFLAG_FENCE_GOAL)) {
vmw_fences_update(dev_priv->fman);
wake_up_all(&dev_priv->fence_queue);
}
if (status & SVGA_IRQFLAG_FIFO_PROGRESS)
if (masked_status & SVGA_IRQFLAG_FIFO_PROGRESS)
wake_up_all(&dev_priv->fifo_queue);
if (likely(status)) {
outl(status, dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
return IRQ_HANDLED;
}
return IRQ_NONE;
return IRQ_HANDLED;
}
static bool vmw_fifo_idle(struct vmw_private *dev_priv, uint32_t seqno)
@ -78,7 +80,7 @@ void vmw_update_seqno(struct vmw_private *dev_priv,
if (dev_priv->last_read_seqno != seqno) {
dev_priv->last_read_seqno = seqno;
vmw_marker_pull(&fifo_state->marker_queue, seqno);
vmw_fences_update(dev_priv->fman, seqno);
vmw_fences_update(dev_priv->fman);
}
}
@ -189,9 +191,8 @@ void vmw_seqno_waiter_add(struct vmw_private *dev_priv)
spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
outl(SVGA_IRQFLAG_ANY_FENCE,
dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
vmw_write(dev_priv, SVGA_REG_IRQMASK,
vmw_read(dev_priv, SVGA_REG_IRQMASK) |
SVGA_IRQFLAG_ANY_FENCE);
dev_priv->irq_mask |= SVGA_IRQFLAG_ANY_FENCE;
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
}
mutex_unlock(&dev_priv->hw_mutex);
@ -204,9 +205,39 @@ void vmw_seqno_waiter_remove(struct vmw_private *dev_priv)
unsigned long irq_flags;
spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
vmw_write(dev_priv, SVGA_REG_IRQMASK,
vmw_read(dev_priv, SVGA_REG_IRQMASK) &
~SVGA_IRQFLAG_ANY_FENCE);
dev_priv->irq_mask &= ~SVGA_IRQFLAG_ANY_FENCE;
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
}
mutex_unlock(&dev_priv->hw_mutex);
}
void vmw_goal_waiter_add(struct vmw_private *dev_priv)
{
mutex_lock(&dev_priv->hw_mutex);
if (dev_priv->goal_queue_waiters++ == 0) {
unsigned long irq_flags;
spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
outl(SVGA_IRQFLAG_FENCE_GOAL,
dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
dev_priv->irq_mask |= SVGA_IRQFLAG_FENCE_GOAL;
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
}
mutex_unlock(&dev_priv->hw_mutex);
}
void vmw_goal_waiter_remove(struct vmw_private *dev_priv)
{
mutex_lock(&dev_priv->hw_mutex);
if (--dev_priv->goal_queue_waiters == 0) {
unsigned long irq_flags;
spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
dev_priv->irq_mask &= ~SVGA_IRQFLAG_FENCE_GOAL;
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
}
mutex_unlock(&dev_priv->hw_mutex);

47
include/drm/vmwgfx_drm.h
View File

@ -683,6 +683,51 @@ struct drm_vmw_fence_arg {
};
/*************************************************************************/
/**
* DRM_VMW_FENCE_EVENT
*
* Queues an event on a fence to be delivered on the drm character device
* when the fence has signaled the DRM_VMW_FENCE_FLAG_EXEC flag.
* Optionally the approximate time when the fence signaled is
* given by the event.
*/
/*
* The event type
*/
#define DRM_VMW_EVENT_FENCE_SIGNALED 0x80000000
struct drm_vmw_event_fence {
struct drm_event base;
uint64_t user_data;
uint32_t tv_sec;
uint32_t tv_usec;
};
/*
* Flags that may be given to the command.
*/
/* Request fence signaled time on the event. */
#define DRM_VMW_FE_FLAG_REQ_TIME (1 << 0)
/**
* struct drm_vmw_fence_event_arg
*
* @fence_rep: Pointer to fence_rep structure cast to uint64_t or 0 if
* the fence is not supposed to be referenced by user-space.
* @user_info: Info to be delivered with the event.
* @handle: Attach the event to this fence only.
* @flags: A set of flags as defined above.
*/
struct drm_vmw_fence_event_arg {
uint64_t fence_rep;
uint64_t user_data;
uint32_t handle;
uint32_t flags;
};
/*************************************************************************/
/**
* DRM_VMW_PRESENT
@ -743,6 +788,4 @@ struct drm_vmw_present_readback_arg {
uint64_t clips_ptr;
uint64_t fence_rep;
};
#endif