summaryrefslogtreecommitdiff
path: root/sys/dev/drm/drm_irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/dev/drm/drm_irq.c')
-rw-r--r--sys/dev/drm/drm_irq.c474
1 files changed, 366 insertions, 108 deletions
diff --git a/sys/dev/drm/drm_irq.c b/sys/dev/drm/drm_irq.c
index 580980ee8cbc..534d501139a0 100644
--- a/sys/dev/drm/drm_irq.c
+++ b/sys/dev/drm/drm_irq.c
@@ -1,6 +1,3 @@
-/* drm_irq.c -- IRQ IOCTL and function support
- * Created: Fri Oct 18 2003 by anholt@FreeBSD.org
- */
/*-
* Copyright 2003 Eric Anholt
* All Rights Reserved.
@@ -31,73 +28,152 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
+/** @file drm_irq.c
+ * Support code for handling setup/teardown of interrupt handlers and
+ * handing interrupt handlers off to the drivers.
+ */
+
#include "dev/drm/drmP.h"
#include "dev/drm/drm.h"
-int drm_irq_by_busid(DRM_IOCTL_ARGS)
-{
- DRM_DEVICE;
- drm_irq_busid_t irq;
+static void drm_locked_task(void *context, int pending __unused);
- DRM_COPY_FROM_USER_IOCTL(irq, (drm_irq_busid_t *)data, sizeof(irq));
+int drm_irq_by_busid(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_irq_busid *irq = data;
- if ((irq.busnum >> 8) != dev->pci_domain ||
- (irq.busnum & 0xff) != dev->pci_bus ||
- irq.devnum != dev->pci_slot ||
- irq.funcnum != dev->pci_func)
+ if ((irq->busnum >> 8) != dev->pci_domain ||
+ (irq->busnum & 0xff) != dev->pci_bus ||
+ irq->devnum != dev->pci_slot ||
+ irq->funcnum != dev->pci_func)
return EINVAL;
- irq.irq = dev->irq;
+ irq->irq = dev->irq;
DRM_DEBUG("%d:%d:%d => IRQ %d\n",
- irq.busnum, irq.devnum, irq.funcnum, irq.irq);
-
- DRM_COPY_TO_USER_IOCTL( (drm_irq_busid_t *)data, irq, sizeof(irq) );
+ irq->busnum, irq->devnum, irq->funcnum, irq->irq);
return 0;
}
-#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
static irqreturn_t
drm_irq_handler_wrap(DRM_IRQ_ARGS)
{
- drm_device_t *dev = (drm_device_t *)arg;
+ struct drm_device *dev = arg;
DRM_SPINLOCK(&dev->irq_lock);
- dev->driver.irq_handler(arg);
+ dev->driver->irq_handler(arg);
DRM_SPINUNLOCK(&dev->irq_lock);
}
-#endif
-int drm_irq_install(drm_device_t *dev)
+static void vblank_disable_fn(void *arg)
+{
+ struct drm_device *dev = (struct drm_device *)arg;
+ int i;
+
+ if (callout_pending(&dev->vblank_disable_timer)) {
+ /* callout was reset */
+ return;
+ }
+ if (!callout_active(&dev->vblank_disable_timer)) {
+ /* callout was stopped */
+ return;
+ }
+ callout_deactivate(&dev->vblank_disable_timer);
+
+ DRM_DEBUG("vblank_disable_allowed=%d\n", dev->vblank_disable_allowed);
+ if (!dev->vblank_disable_allowed)
+ return;
+
+ for (i = 0; i < dev->num_crtcs; i++) {
+ if (atomic_read(&dev->vblank[i].refcount) == 0 &&
+ dev->vblank[i].enabled) {
+ DRM_DEBUG("disabling vblank on crtc %d\n", i);
+ dev->vblank[i].last =
+ dev->driver->get_vblank_counter(dev, i);
+ dev->driver->disable_vblank(dev, i);
+ dev->vblank[i].enabled = 0;
+ }
+ }
+}
+
+static void drm_vblank_cleanup(struct drm_device *dev)
+{
+ unsigned long irqflags;
+
+ /* Bail if the driver didn't call drm_vblank_init() */
+ if (dev->num_crtcs == 0)
+ return;
+
+ DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
+ callout_stop(&dev->vblank_disable_timer);
+ DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
+
+ callout_drain(&dev->vblank_disable_timer);
+
+ vblank_disable_fn((void *)dev);
+
+ free(dev->vblank, DRM_MEM_DRIVER);
+
+ dev->num_crtcs = 0;
+}
+
+int drm_vblank_init(struct drm_device *dev, int num_crtcs)
+{
+ int i, ret = ENOMEM;
+
+ callout_init_mtx(&dev->vblank_disable_timer, &dev->vbl_lock, 0);
+ atomic_set(&dev->vbl_signal_pending, 0);
+ dev->num_crtcs = num_crtcs;
+
+ dev->vblank = malloc(sizeof(struct drm_vblank_info) * num_crtcs,
+ DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
+ if (!dev->vblank)
+ goto err;
+
+ DRM_DEBUG("\n");
+
+ /* Zero per-crtc vblank stuff */
+ for (i = 0; i < num_crtcs; i++) {
+ DRM_INIT_WAITQUEUE(&dev->vblank[i].queue);
+ TAILQ_INIT(&dev->vblank[i].sigs);
+ atomic_set(&dev->vblank[i].count, 0);
+ atomic_set(&dev->vblank[i].refcount, 0);
+ }
+
+ dev->vblank_disable_allowed = 0;
+
+ return 0;
+
+err:
+ drm_vblank_cleanup(dev);
+ return ret;
+}
+
+int drm_irq_install(struct drm_device *dev)
{
int retcode;
-#ifdef __NetBSD__
- pci_intr_handle_t ih;
-#endif
if (dev->irq == 0 || dev->dev_private == NULL)
- return DRM_ERR(EINVAL);
+ return EINVAL;
- DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
+ DRM_DEBUG("irq=%d\n", dev->irq);
DRM_LOCK();
if (dev->irq_enabled) {
DRM_UNLOCK();
- return DRM_ERR(EBUSY);
+ return EBUSY;
}
dev->irq_enabled = 1;
dev->context_flag = 0;
- DRM_SPININIT(dev->irq_lock, "DRM IRQ lock");
-
- /* Before installing handler */
- dev->driver.irq_preinstall(dev);
+ /* Before installing handler */
+ dev->driver->irq_preinstall(dev);
DRM_UNLOCK();
- /* Install handler */
-#ifdef __FreeBSD__
+ /* Install handler */
dev->irqrid = 0;
dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
&dev->irqrid, RF_SHAREABLE);
@@ -105,172 +181,303 @@ int drm_irq_install(drm_device_t *dev)
retcode = ENOENT;
goto err;
}
-#if __FreeBSD_version < 500000
- retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY,
- dev->irq_handler, dev, &dev->irqh);
-#else
- retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY | INTR_MPSAFE,
+#if __FreeBSD_version >= 700031
+ retcode = bus_setup_intr(dev->device, dev->irqr,
+ INTR_TYPE_TTY | INTR_MPSAFE,
NULL, drm_irq_handler_wrap, dev, &dev->irqh);
+#else
+ retcode = bus_setup_intr(dev->device, dev->irqr,
+ INTR_TYPE_TTY | INTR_MPSAFE,
+ drm_irq_handler_wrap, dev, &dev->irqh);
#endif
if (retcode != 0)
goto err;
-#elif defined(__NetBSD__) || defined(__OpenBSD__)
- if (pci_intr_map(&dev->pa, &ih) != 0) {
- retcode = ENOENT;
- goto err;
- }
- dev->irqh = pci_intr_establish(&dev->pa.pa_pc, ih, IPL_TTY,
- (irqreturn_t (*)(void *))dev->irq_handler, dev);
- if (!dev->irqh) {
- retcode = ENOENT;
- goto err;
- }
-#endif
- /* After installing handler */
+ /* After installing handler */
DRM_LOCK();
- dev->driver.irq_postinstall(dev);
+ dev->driver->irq_postinstall(dev);
DRM_UNLOCK();
+ TASK_INIT(&dev->locked_task, 0, drm_locked_task, dev);
return 0;
err:
DRM_LOCK();
dev->irq_enabled = 0;
-#ifdef ___FreeBSD__
if (dev->irqrid != 0) {
bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
dev->irqr);
dev->irqrid = 0;
}
-#endif
- DRM_SPINUNINIT(dev->irq_lock);
DRM_UNLOCK();
return retcode;
}
-int drm_irq_uninstall(drm_device_t *dev)
+int drm_irq_uninstall(struct drm_device *dev)
{
-#ifdef __FreeBSD__
int irqrid;
-#endif
if (!dev->irq_enabled)
- return DRM_ERR(EINVAL);
+ return EINVAL;
dev->irq_enabled = 0;
-#ifdef __FreeBSD__
irqrid = dev->irqrid;
dev->irqrid = 0;
-#endif
- DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
+ DRM_DEBUG("irq=%d\n", dev->irq);
- dev->driver.irq_uninstall(dev);
+ dev->driver->irq_uninstall(dev);
-#ifdef __FreeBSD__
DRM_UNLOCK();
bus_teardown_intr(dev->device, dev->irqr, dev->irqh);
bus_release_resource(dev->device, SYS_RES_IRQ, irqrid, dev->irqr);
DRM_LOCK();
-#elif defined(__NetBSD__) || defined(__OpenBSD__)
- pci_intr_disestablish(&dev->pa.pa_pc, dev->irqh);
-#endif
- DRM_SPINUNINIT(dev->irq_lock);
+
+ drm_vblank_cleanup(dev);
return 0;
}
-int drm_control(DRM_IOCTL_ARGS)
+int drm_control(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
- DRM_DEVICE;
- drm_control_t ctl;
+ struct drm_control *ctl = data;
int err;
- DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) );
-
- switch ( ctl.func ) {
+ switch (ctl->func) {
case DRM_INST_HANDLER:
/* Handle drivers whose DRM used to require IRQ setup but the
* no longer does.
*/
- if (!dev->driver.use_irq)
+ if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
if (dev->if_version < DRM_IF_VERSION(1, 2) &&
- ctl.irq != dev->irq)
- return DRM_ERR(EINVAL);
+ ctl->irq != dev->irq)
+ return EINVAL;
return drm_irq_install(dev);
case DRM_UNINST_HANDLER:
- if (!dev->driver.use_irq)
+ if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
DRM_LOCK();
err = drm_irq_uninstall(dev);
DRM_UNLOCK();
return err;
default:
- return DRM_ERR(EINVAL);
+ return EINVAL;
}
}
-int drm_wait_vblank(DRM_IOCTL_ARGS)
+u32 drm_vblank_count(struct drm_device *dev, int crtc)
{
- DRM_DEVICE;
- drm_wait_vblank_t vblwait;
- struct timeval now;
- int ret;
+ return atomic_read(&dev->vblank[crtc].count);
+}
+
+static void drm_update_vblank_count(struct drm_device *dev, int crtc)
+{
+ 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);
+ diff = cur_vblank - dev->vblank[crtc].last;
+ if (cur_vblank < dev->vblank[crtc].last) {
+ diff += dev->max_vblank_count;
+
+ DRM_DEBUG("vblank[%d].last=0x%x, cur_vblank=0x%x => diff=0x%x\n",
+ crtc, dev->vblank[crtc].last, cur_vblank, diff);
+ }
+
+ DRM_DEBUG("enabling vblank interrupts on crtc %d, missed %d\n",
+ crtc, diff);
+
+ atomic_add(diff, &dev->vblank[crtc].count);
+}
+
+int drm_vblank_get(struct drm_device *dev, int crtc)
+{
+ unsigned long irqflags;
+ int ret = 0;
+
+ DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
+ /* Going from 0->1 means we have to enable interrupts again */
+ atomic_add_acq_int(&dev->vblank[crtc].refcount, 1);
+ if (dev->vblank[crtc].refcount == 1 &&
+ !dev->vblank[crtc].enabled) {
+ ret = dev->driver->enable_vblank(dev, crtc);
+ if (ret)
+ atomic_dec(&dev->vblank[crtc].refcount);
+ else {
+ dev->vblank[crtc].enabled = 1;
+ drm_update_vblank_count(dev, crtc);
+ }
+ }
+ DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
+
+ return ret;
+}
+
+void drm_vblank_put(struct drm_device *dev, int crtc)
+{
+ unsigned long irqflags;
+
+ DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
+ /* Last user schedules interrupt disable */
+ atomic_subtract_acq_int(&dev->vblank[crtc].refcount, 1);
+ if (dev->vblank[crtc].refcount == 0)
+ callout_reset(&dev->vblank_disable_timer, 5 * DRM_HZ,
+ (timeout_t *)vblank_disable_fn, (void *)dev);
+ DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
+}
+
+int drm_modeset_ctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_modeset_ctl *modeset = data;
+ unsigned long irqflags;
+ int crtc, ret = 0;
+
+ DRM_DEBUG("num_crtcs=%d\n", dev->num_crtcs);
+ /* If drm_vblank_init() hasn't been called yet, just no-op */
+ if (!dev->num_crtcs)
+ goto out;
+
+ crtc = modeset->crtc;
+ DRM_DEBUG("crtc=%d\n", crtc);
+ if (crtc >= dev->num_crtcs) {
+ ret = EINVAL;
+ goto out;
+ }
+
+ /*
+ * To avoid all the problems that might happen if interrupts
+ * were enabled/disabled around or between these calls, we just
+ * have the kernel take a reference on the CRTC (just once though
+ * to avoid corrupting the count if multiple, mismatch calls occur),
+ * so that interrupts remain enabled in the interim.
+ */
+ switch (modeset->cmd) {
+ case _DRM_PRE_MODESET:
+ DRM_DEBUG("pre-modeset\n");
+ if (!dev->vblank[crtc].inmodeset) {
+ dev->vblank[crtc].inmodeset = 1;
+ drm_vblank_get(dev, crtc);
+ }
+ break;
+ case _DRM_POST_MODESET:
+ DRM_DEBUG("post-modeset\n");
+ if (dev->vblank[crtc].inmodeset) {
+ DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
+ dev->vblank_disable_allowed = 1;
+ dev->vblank[crtc].inmodeset = 0;
+ DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags);
+ drm_vblank_put(dev, crtc);
+ }
+ break;
+ default:
+ ret = EINVAL;
+ break;
+ }
+
+out:
+ return ret;
+}
+
+int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+ union drm_wait_vblank *vblwait = data;
+ int ret = 0;
+ int flags, seq, crtc;
if (!dev->irq_enabled)
- return DRM_ERR(EINVAL);
+ return EINVAL;
+
+ if (vblwait->request.type &
+ ~(_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK)) {
+ DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n",
+ vblwait->request.type,
+ (_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK));
+ return EINVAL;
+ }
- DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data,
- sizeof(vblwait) );
+ flags = vblwait->request.type & _DRM_VBLANK_FLAGS_MASK;
+ crtc = flags & _DRM_VBLANK_SECONDARY ? 1 : 0;
- if (vblwait.request.type & _DRM_VBLANK_RELATIVE) {
- vblwait.request.sequence += atomic_read(&dev->vbl_received);
- vblwait.request.type &= ~_DRM_VBLANK_RELATIVE;
+ if (crtc >= dev->num_crtcs)
+ return EINVAL;
+
+ ret = drm_vblank_get(dev, crtc);
+ if (ret)
+ return ret;
+ seq = drm_vblank_count(dev, crtc);
+
+ switch (vblwait->request.type & _DRM_VBLANK_TYPES_MASK) {
+ case _DRM_VBLANK_RELATIVE:
+ vblwait->request.sequence += seq;
+ vblwait->request.type &= ~_DRM_VBLANK_RELATIVE;
+ case _DRM_VBLANK_ABSOLUTE:
+ break;
+ default:
+ ret = EINVAL;
+ goto done;
+ }
+
+ if ((flags & _DRM_VBLANK_NEXTONMISS) &&
+ (seq - vblwait->request.sequence) <= (1<<23)) {
+ vblwait->request.sequence = seq + 1;
}
- flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK;
if (flags & _DRM_VBLANK_SIGNAL) {
#if 0 /* disabled */
- drm_vbl_sig_t *vbl_sig = malloc(sizeof(drm_vbl_sig_t), M_DRM,
- M_NOWAIT | M_ZERO);
+ drm_vbl_sig_t *vbl_sig = malloc(sizeof(drm_vbl_sig_t),
+ DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
if (vbl_sig == NULL)
return ENOMEM;
- vbl_sig->sequence = vblwait.request.sequence;
- vbl_sig->signo = vblwait.request.signal;
+ vbl_sig->sequence = vblwait->request.sequence;
+ vbl_sig->signo = vblwait->request.signal;
vbl_sig->pid = DRM_CURRENTPID;
- vblwait.reply.sequence = atomic_read(&dev->vbl_received);
+ vblwait->reply.sequence = atomic_read(&dev->vbl_received);
- DRM_SPINLOCK(&dev->irq_lock);
+ DRM_SPINLOCK(&dev->vbl_lock);
TAILQ_INSERT_HEAD(&dev->vbl_sig_list, vbl_sig, link);
- DRM_SPINUNLOCK(&dev->irq_lock);
+ DRM_SPINUNLOCK(&dev->vbl_lock);
ret = 0;
#endif
ret = EINVAL;
} else {
DRM_LOCK();
- ret = dev->driver.vblank_wait(dev, &vblwait.request.sequence);
+ /* shared code returns -errno */
+
+ DRM_WAIT_ON(ret, dev->vblank[crtc].queue, 3 * DRM_HZ,
+ ((drm_vblank_count(dev, crtc)
+ - vblwait->request.sequence) <= (1 << 23)));
DRM_UNLOCK();
- microtime(&now);
- vblwait.reply.tval_sec = now.tv_sec;
- vblwait.reply.tval_usec = now.tv_usec;
- }
+ if (ret != EINTR) {
+ struct timeval now;
- DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait,
- sizeof(vblwait) );
+ microtime(&now);
+ vblwait->reply.tval_sec = now.tv_sec;
+ vblwait->reply.tval_usec = now.tv_usec;
+ vblwait->reply.sequence = drm_vblank_count(dev, crtc);
+ }
+ }
+done:
+ drm_vblank_put(dev, crtc);
return ret;
}
-void drm_vbl_send_signals(drm_device_t *dev)
+void drm_vbl_send_signals(struct drm_device *dev, int crtc)
{
}
#if 0 /* disabled */
-void drm_vbl_send_signals( drm_device_t *dev )
+void drm_vbl_send_signals(struct drm_device *dev, int crtc )
{
drm_vbl_sig_t *vbl_sig;
unsigned int vbl_seq = atomic_read( &dev->vbl_received );
@@ -280,7 +487,7 @@ void drm_vbl_send_signals( drm_device_t *dev )
while (vbl_sig != NULL) {
drm_vbl_sig_t *next = TAILQ_NEXT(vbl_sig, link);
- if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
+ if ((vbl_seq - vbl_sig->sequence) <= (1 << 23)) {
p = pfind(vbl_sig->pid);
if (p != NULL)
psignal(p, vbl_sig->signo);
@@ -292,3 +499,54 @@ void drm_vbl_send_signals( drm_device_t *dev )
}
}
#endif
+
+void drm_handle_vblank(struct drm_device *dev, int crtc)
+{
+ atomic_inc(&dev->vblank[crtc].count);
+ DRM_WAKEUP(&dev->vblank[crtc].queue);
+ drm_vbl_send_signals(dev, crtc);
+}
+
+static void drm_locked_task(void *context, int pending __unused)
+{
+ struct drm_device *dev = context;
+
+ DRM_SPINLOCK(&dev->tsk_lock);
+
+ DRM_LOCK(); /* XXX drm_lock_take() should do it's own locking */
+ if (dev->locked_task_call == NULL ||
+ drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT) == 0) {
+ DRM_UNLOCK();
+ DRM_SPINUNLOCK(&dev->tsk_lock);
+ return;
+ }
+
+ dev->lock.file_priv = NULL; /* kernel owned */
+ dev->lock.lock_time = jiffies;
+ atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
+
+ DRM_UNLOCK();
+
+ dev->locked_task_call(dev);
+
+ drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
+
+ dev->locked_task_call = NULL;
+
+ DRM_SPINUNLOCK(&dev->tsk_lock);
+}
+
+void
+drm_locked_tasklet(struct drm_device *dev,
+ void (*tasklet)(struct drm_device *dev))
+{
+ DRM_SPINLOCK(&dev->tsk_lock);
+ if (dev->locked_task_call != NULL) {
+ DRM_SPINUNLOCK(&dev->tsk_lock);
+ return;
+ }
+
+ dev->locked_task_call = tasklet;
+ DRM_SPINUNLOCK(&dev->tsk_lock);
+ taskqueue_enqueue(taskqueue_swi, &dev->locked_task);
+}
generated by cgit v1.3 (git 2.53.0) at 2026-07-28 09:52:20 +0000