Merge commit 'v2.6.26' into bkl-removal

1 files changed, 56 insertions, 325 deletions

diff --git a/drivers/char/drm/drm_irq.c b/drivers/char/drm/drm_irq.c
index 286f9d61e7d5..089c015c01d1 100644
--- a/drivers/char/drm/drm_irq.c
+++ b/drivers/char/drm/drm_irq.c
@@ -71,117 +71,6 @@ int drm_irq_by_busid(struct drm_device *dev, void *data,
         return 0;
 }
 
-static void vblank_disable_fn(unsigned long arg)
-{
-        struct drm_device *dev = (struct drm_device *)arg;
-        unsigned long irqflags;
-        int i;
-
-        for (i = 0; i < dev->num_crtcs; i++) {
-                spin_lock_irqsave(&dev->vbl_lock, irqflags);
-                if (atomic_read(&dev->vblank_refcount[i]) == 0 &&
-                    dev->vblank_enabled[i]) {
-                        dev->driver->disable_vblank(dev, i);
-                        dev->vblank_enabled[i] = 0;
-                }
-                spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
-        }
-}
-
-static void drm_vblank_cleanup(struct drm_device *dev)
-{
-        /* Bail if the driver didn't call drm_vblank_init() */
-        if (dev->num_crtcs == 0)
-                return;
-
-        del_timer(&dev->vblank_disable_timer);
-
-        vblank_disable_fn((unsigned long)dev);
-
-        drm_free(dev->vbl_queue, sizeof(*dev->vbl_queue) * dev->num_crtcs,
-                 DRM_MEM_DRIVER);
-        drm_free(dev->vbl_sigs, sizeof(*dev->vbl_sigs) * dev->num_crtcs,
-                 DRM_MEM_DRIVER);
-        drm_free(dev->_vblank_count, sizeof(*dev->_vblank_count) *
-                 dev->num_crtcs, DRM_MEM_DRIVER);
-        drm_free(dev->vblank_refcount, sizeof(*dev->vblank_refcount) *
-                 dev->num_crtcs, DRM_MEM_DRIVER);
-        drm_free(dev->vblank_enabled, sizeof(*dev->vblank_enabled) *
-                 dev->num_crtcs, DRM_MEM_DRIVER);
-        drm_free(dev->last_vblank, sizeof(*dev->last_vblank) * dev->num_crtcs,
-                 DRM_MEM_DRIVER);
-        drm_free(dev->vblank_premodeset, sizeof(*dev->vblank_premodeset) *
-                 dev->num_crtcs, DRM_MEM_DRIVER);
-        drm_free(dev->vblank_offset, sizeof(*dev->vblank_offset) * dev->num_crtcs,
-                 DRM_MEM_DRIVER);
-
-        dev->num_crtcs = 0;
-}
-
-int drm_vblank_init(struct drm_device *dev, int num_crtcs)
-{
-        int i, ret = -ENOMEM;
-
-        setup_timer(&dev->vblank_disable_timer, vblank_disable_fn,
-                    (unsigned long)dev);
-        spin_lock_init(&dev->vbl_lock);
-        atomic_set(&dev->vbl_signal_pending, 0);
-        dev->num_crtcs = num_crtcs;
-
-        dev->vbl_queue = drm_alloc(sizeof(wait_queue_head_t) * num_crtcs,
-                                   DRM_MEM_DRIVER);
-        if (!dev->vbl_queue)
-                goto err;
-
-        dev->vbl_sigs = drm_alloc(sizeof(struct list_head) * num_crtcs,
-                                  DRM_MEM_DRIVER);
-        if (!dev->vbl_sigs)
-                goto err;
-
-        dev->_vblank_count = drm_alloc(sizeof(atomic_t) * num_crtcs,
-                                      DRM_MEM_DRIVER);
-        if (!dev->_vblank_count)
-                goto err;
-
-        dev->vblank_refcount = drm_alloc(sizeof(atomic_t) * num_crtcs,
-                                         DRM_MEM_DRIVER);
-        if (!dev->vblank_refcount)
-                goto err;
-
-        dev->vblank_enabled = drm_calloc(num_crtcs, sizeof(int),
-                                         DRM_MEM_DRIVER);
-        if (!dev->vblank_enabled)
-                goto err;
-
-        dev->last_vblank = drm_calloc(num_crtcs, sizeof(u32), DRM_MEM_DRIVER);
-        if (!dev->last_vblank)
-                goto err;
-
-        dev->vblank_premodeset = drm_calloc(num_crtcs, sizeof(u32),
-                                            DRM_MEM_DRIVER);
-        if (!dev->vblank_premodeset)
-                goto err;
-
-        dev->vblank_offset = drm_calloc(num_crtcs, sizeof(u32), DRM_MEM_DRIVER);
-        if (!dev->vblank_offset)
-                goto err;
-
-        /* Zero per-crtc vblank stuff */
-        for (i = 0; i < num_crtcs; i++) {
-                init_waitqueue_head(&dev->vbl_queue[i]);
-                INIT_LIST_HEAD(&dev->vbl_sigs[i]);
-                atomic_set(&dev->_vblank_count[i], 0);
-                atomic_set(&dev->vblank_refcount[i], 0);
-        }
-
-        return 0;
-
-err:
-        drm_vblank_cleanup(dev);
-        return ret;
-}
-EXPORT_SYMBOL(drm_vblank_init);
-
 /**
  * Install IRQ handler.
  *
@@ -220,6 +109,17 @@ static int drm_irq_install(struct drm_device * dev)
 
         DRM_DEBUG("irq=%d\n", dev->irq);
 
+        if (drm_core_check_feature(dev, DRIVER_IRQ_VBL)) {
+                init_waitqueue_head(&dev->vbl_queue);
+
+                spin_lock_init(&dev->vbl_lock);
+
+                INIT_LIST_HEAD(&dev->vbl_sigs);
+                INIT_LIST_HEAD(&dev->vbl_sigs2);
+
+                dev->vbl_pending = 0;
+        }
+
         /* Before installing handler */
         dev->driver->irq_preinstall(dev);
 
@@ -237,14 +137,9 @@ static int drm_irq_install(struct drm_device * dev)
         }
 
         /* After installing handler */
-        ret = dev->driver->irq_postinstall(dev);
-        if (ret < 0) {
-                mutex_lock(&dev->struct_mutex);
-                dev->irq_enabled = 0;
-                mutex_unlock(&dev->struct_mutex);
-        }
+        dev->driver->irq_postinstall(dev);
 
-        return ret;
+        return 0;
 }
 
 /**
@@ -275,8 +170,6 @@ int drm_irq_uninstall(struct drm_device * dev)
 
         free_irq(dev->irq, dev);
 
-        drm_vblank_cleanup(dev);
-
         dev->locked_tasklet_func = NULL;
 
         return 0;
@@ -321,148 +214,6 @@ int drm_control(struct drm_device *dev, void *data,
 }
 
 /**
- * drm_vblank_count - retrieve "cooked" vblank counter value
- * @dev: DRM device
- * @crtc: which counter to retrieve
- *
- * Fetches the "cooked" vblank count value that represents the number of
- * vblank events since the system was booted, including lost events due to
- * modesetting activity.
- */
-u32 drm_vblank_count(struct drm_device *dev, int crtc)
-{
-        return atomic_read(&dev->_vblank_count[crtc]) +
-                dev->vblank_offset[crtc];
-}
-EXPORT_SYMBOL(drm_vblank_count);
-
-/**
- * drm_update_vblank_count - update the master vblank counter
- * @dev: DRM device
- * @crtc: counter to update
- *
- * Call back into the driver to update the appropriate vblank counter
- * (specified by @crtc).  Deal with wraparound, if it occurred, and
- * update the last read value so we can deal with wraparound on the next
- * call if necessary.
- */
-void drm_update_vblank_count(struct drm_device *dev, int crtc)
-{
-        unsigned long irqflags;
-        u32 cur_vblank, diff;
-
-        /*
-         * Interrupts were disabled prior to this call, so deal with counter
-         * wrap if needed.
-         * NOTE!  It's possible we lost a full dev->max_vblank_count events
-         * here if the register is small or we had vblank interrupts off for
-         * a long time.
-         */
-        cur_vblank = dev->driver->get_vblank_counter(dev, crtc);
-        spin_lock_irqsave(&dev->vbl_lock, irqflags);
-        if (cur_vblank < dev->last_vblank[crtc]) {
-                diff = dev->max_vblank_count -
-                        dev->last_vblank[crtc];
-                diff += cur_vblank;
-        } else {
-                diff = cur_vblank - dev->last_vblank[crtc];
-        }
-        dev->last_vblank[crtc] = cur_vblank;
-        spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
-
-        atomic_add(diff, &dev->_vblank_count[crtc]);
-}
-EXPORT_SYMBOL(drm_update_vblank_count);
-
-/**
- * drm_vblank_get - get a reference count on vblank events
- * @dev: DRM device
- * @crtc: which CRTC to own
- *
- * Acquire a reference count on vblank events to avoid having them disabled
- * while in use.  Note callers will probably want to update the master counter
- * using drm_update_vblank_count() above before calling this routine so that
- * wakeups occur on the right vblank event.
- *
- * RETURNS
- * Zero on success, nonzero on failure.
- */
-int drm_vblank_get(struct drm_device *dev, int crtc)
-{
-        unsigned long irqflags;
-        int ret = 0;
-
-        spin_lock_irqsave(&dev->vbl_lock, irqflags);
-        /* Going from 0->1 means we have to enable interrupts again */
-        if (atomic_add_return(1, &dev->vblank_refcount[crtc]) == 1 &&
-            !dev->vblank_enabled[crtc]) {
-                ret = dev->driver->enable_vblank(dev, crtc);
-                if (ret)
-                        atomic_dec(&dev->vblank_refcount[crtc]);
-                else
-                        dev->vblank_enabled[crtc] = 1;
-        }
-        spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
-
-        return ret;
-}
-EXPORT_SYMBOL(drm_vblank_get);
-
-/**
- * drm_vblank_put - give up ownership of vblank events
- * @dev: DRM device
- * @crtc: which counter to give up
- *
- * Release ownership of a given vblank counter, turning off interrupts
- * if possible.
- */
-void drm_vblank_put(struct drm_device *dev, int crtc)
-{
-        /* Last user schedules interrupt disable */
-        if (atomic_dec_and_test(&dev->vblank_refcount[crtc]))
-            mod_timer(&dev->vblank_disable_timer, jiffies + 5*DRM_HZ);
-}
-EXPORT_SYMBOL(drm_vblank_put);
-
-/**
- * drm_modeset_ctl - handle vblank event counter changes across mode switch
- * @DRM_IOCTL_ARGS: standard ioctl arguments
- *
- * Applications should call the %_DRM_PRE_MODESET and %_DRM_POST_MODESET
- * ioctls around modesetting so that any lost vblank events are accounted for.
- */
-int drm_modeset_ctl(struct drm_device *dev, void *data,
-                    struct drm_file *file_priv)
-{
-        struct drm_modeset_ctl *modeset = data;
-        int crtc, ret = 0;
-        u32 new;
-
-        crtc = modeset->arg;
-        if (crtc >= dev->num_crtcs) {
-                ret = -EINVAL;
-                goto out;
-        }
-
-        switch (modeset->cmd) {
-        case _DRM_PRE_MODESET:
-                dev->vblank_premodeset[crtc] =
-                        dev->driver->get_vblank_counter(dev, crtc);
-                break;
-        case _DRM_POST_MODESET:
-                new = dev->driver->get_vblank_counter(dev, crtc);
-                dev->vblank_offset[crtc] = dev->vblank_premodeset[crtc] - new;
-                break;
-        default:
-                ret = -EINVAL;
-                break;
-        }
-
-out:
-        return ret;
-}
-
-/**
  * Wait for VBLANK.
  *
  * \param inode device inode.
@@ -481,13 +232,12 @@ out:
  *
  * If a signal is not requested, then calls vblank_wait().
  */
-int drm_wait_vblank(struct drm_device *dev, void *data,
-                    struct drm_file *file_priv)
+int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
         union drm_wait_vblank *vblwait = data;
         struct timeval now;
         int ret = 0;
-        unsigned int flags, seq, crtc;
+        unsigned int flags, seq;
 
         if ((!dev->irq) || (!dev->irq_enabled))
                 return -EINVAL;
@@ -501,13 +251,13 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
         }
 
         flags = vblwait->request.type & _DRM_VBLANK_FLAGS_MASK;
-        crtc = flags & _DRM_VBLANK_SECONDARY ? 1 : 0;
 
-        if (crtc >= dev->num_crtcs)
+        if (!drm_core_check_feature(dev, (flags & _DRM_VBLANK_SECONDARY) ?
+                                    DRIVER_IRQ_VBL2 : DRIVER_IRQ_VBL))
                 return -EINVAL;
 
-        drm_update_vblank_count(dev, crtc);
-        seq = drm_vblank_count(dev, crtc);
+        seq = atomic_read((flags & _DRM_VBLANK_SECONDARY) ? &dev->vbl_received2
+                          : &dev->vbl_received);
 
         switch (vblwait->request.type & _DRM_VBLANK_TYPES_MASK) {
         case _DRM_VBLANK_RELATIVE:
@@ -526,7 +276,8 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
 
         if (flags & _DRM_VBLANK_SIGNAL) {
                 unsigned long irqflags;
-                struct list_head *vbl_sigs = &dev->vbl_sigs[crtc];
+                struct list_head *vbl_sigs = (flags & _DRM_VBLANK_SECONDARY)
+                                      ? &dev->vbl_sigs2 : &dev->vbl_sigs;
                 struct drm_vbl_sig *vbl_sig;
 
                 spin_lock_irqsave(&dev->vbl_lock, irqflags);
@@ -547,26 +298,22 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
                         }
                 }
 
-                if (atomic_read(&dev->vbl_signal_pending) >= 100) {
+                if (dev->vbl_pending >= 100) {
                         spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
                         return -EBUSY;
                 }
 
+                dev->vbl_pending++;
+
                 spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
 
-                vbl_sig = drm_calloc(1, sizeof(struct drm_vbl_sig),
-                                     DRM_MEM_DRIVER);
-                if (!vbl_sig)
+                if (!
+                    (vbl_sig =
+                     drm_alloc(sizeof(struct drm_vbl_sig), DRM_MEM_DRIVER))) {
                         return -ENOMEM;
-
-                ret = drm_vblank_get(dev, crtc);
-                if (ret) {
-                        drm_free(vbl_sig, sizeof(struct drm_vbl_sig),
-                                 DRM_MEM_DRIVER);
-                        return ret;
                 }
 
-                atomic_inc(&dev->vbl_signal_pending);
+                memset((void *)vbl_sig, 0, sizeof(*vbl_sig));
 
                 vbl_sig->sequence = vblwait->request.sequence;
                 vbl_sig->info.si_signo = vblwait->request.signal;
@@ -580,20 +327,17 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
 
                 vblwait->reply.sequence = seq;
         } else {
-                unsigned long cur_vblank;
-
-                ret = drm_vblank_get(dev, crtc);
-                if (ret)
-                        return ret;
-                DRM_WAIT_ON(ret, dev->vbl_queue[crtc], 3 * DRM_HZ,
-                            (((cur_vblank = drm_vblank_count(dev, crtc))
-                              - vblwait->request.sequence) <= (1 << 23)));
-                drm_vblank_put(dev, crtc);
-                do_gettimeofday(&now);
+                if (flags & _DRM_VBLANK_SECONDARY) {
+                        if (dev->driver->vblank_wait2)
+                                ret = dev->driver->vblank_wait2(dev, &vblwait->request.sequence);
+                } else if (dev->driver->vblank_wait)
+                        ret =
+                            dev->driver->vblank_wait(dev,
+                                                     &vblwait->request.sequence);
 
+                do_gettimeofday(&now);
                 vblwait->reply.tval_sec = now.tv_sec;
                 vblwait->reply.tval_usec = now.tv_usec;
-                vblwait->reply.sequence = cur_vblank;
         }
 
       done:
@@ -604,57 +348,44 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
  * Send the VBLANK signals.
  *
  * \param dev DRM device.
- * \param crtc CRTC where the vblank event occurred
  *
  * Sends a signal for each task in drm_device::vbl_sigs and empties the list.
  *
  * If a signal is not requested, then calls vblank_wait().
  */
-static void drm_vbl_send_signals(struct drm_device * dev, int crtc)
+void drm_vbl_send_signals(struct drm_device * dev)
 {
-        struct drm_vbl_sig *vbl_sig, *tmp;
-        struct list_head *vbl_sigs;
-        unsigned int vbl_seq;
         unsigned long flags;
+        int i;
 
         spin_lock_irqsave(&dev->vbl_lock, flags);
 
-        vbl_sigs = &dev->vbl_sigs[crtc];
-        vbl_seq = drm_vblank_count(dev, crtc);
+        for (i = 0; i < 2; i++) {
+                struct drm_vbl_sig *vbl_sig, *tmp;
+                struct list_head *vbl_sigs = i ? &dev->vbl_sigs2 : &dev->vbl_sigs;
+                unsigned int vbl_seq = atomic_read(i ? &dev->vbl_received2 :
+                                                   &dev->vbl_received);
 
-        list_for_each_entry_safe(vbl_sig, tmp, vbl_sigs, head) {
-            if ((vbl_seq - vbl_sig->sequence) <= (1 << 23)) {
-                vbl_sig->info.si_code = vbl_seq;
-                send_sig_info(vbl_sig->info.si_signo,
-                              &vbl_sig->info, vbl_sig->task);
+                list_for_each_entry_safe(vbl_sig, tmp, vbl_sigs, head) {
+                        if ((vbl_seq - vbl_sig->sequence) <= (1 << 23)) {
+                                vbl_sig->info.si_code = vbl_seq;
+                                send_sig_info(vbl_sig->info.si_signo,
+                                              &vbl_sig->info, vbl_sig->task);
 
-                list_del(&vbl_sig->head);
+                                list_del(&vbl_sig->head);
 
-                drm_free(vbl_sig, sizeof(*vbl_sig),
-                         DRM_MEM_DRIVER);
-                atomic_dec(&dev->vbl_signal_pending);
-                drm_vblank_put(dev, crtc);
-            }
+                                drm_free(vbl_sig, sizeof(*vbl_sig),
+                                         DRM_MEM_DRIVER);
+
+                                dev->vbl_pending--;
+                        }
+                }
         }
 
         spin_unlock_irqrestore(&dev->vbl_lock, flags);
 }
 
-/**
- * drm_handle_vblank - handle a vblank event
- * @dev: DRM device
- * @crtc: where this event occurred
- *
- * Drivers should call this routine in their vblank interrupt handlers to
- * update the vblank counter and send any signals that may be pending.
- */
-void drm_handle_vblank(struct drm_device *dev, int crtc)
-{
-        drm_update_vblank_count(dev, crtc);
-        DRM_WAKEUP(&dev->vbl_queue[crtc]);
-        drm_vbl_send_signals(dev, crtc);
-}
-EXPORT_SYMBOL(drm_handle_vblank);
+EXPORT_SYMBOL(drm_vbl_send_signals);
 
 /**
  * Tasklet wrapper function.