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Diffstat (limited to 'drivers/char/drm/drm_irq.c')
-rw-r--r--drivers/char/drm/drm_irq.c462
1 files changed, 0 insertions, 462 deletions
diff --git a/drivers/char/drm/drm_irq.c b/drivers/char/drm/drm_irq.c
deleted file mode 100644
index 089c015c01d..00000000000
--- a/drivers/char/drm/drm_irq.c
+++ /dev/null
@@ -1,462 +0,0 @@
-/**
- * \file drm_irq.c
- * IRQ support
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
- *
- * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include "drmP.h"
-
-#include <linux/interrupt.h> /* For task queue support */
-
-/**
- * Get interrupt from bus id.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_irq_busid structure.
- * \return zero on success or a negative number on failure.
- *
- * Finds the PCI device with the specified bus id and gets its IRQ number.
- * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
- * to that of the device that this DRM instance attached to.
- */
-int drm_irq_by_busid(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_irq_busid *p = data;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
- return -EINVAL;
-
- if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
- (p->busnum & 0xff) != dev->pdev->bus->number ||
- p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
- return -EINVAL;
-
- p->irq = dev->irq;
-
- DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
- p->irq);
-
- return 0;
-}
-
-/**
- * Install IRQ handler.
- *
- * \param dev DRM device.
- * \param irq IRQ number.
- *
- * Initializes the IRQ related data, and setups drm_device::vbl_queue. Installs the handler, calling the driver
- * \c drm_driver_irq_preinstall() and \c drm_driver_irq_postinstall() functions
- * before and after the installation.
- */
-static int drm_irq_install(struct drm_device * dev)
-{
- int ret;
- unsigned long sh_flags = 0;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
- return -EINVAL;
-
- if (dev->irq == 0)
- return -EINVAL;
-
- mutex_lock(&dev->struct_mutex);
-
- /* Driver must have been initialized */
- if (!dev->dev_private) {
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
- }
-
- if (dev->irq_enabled) {
- mutex_unlock(&dev->struct_mutex);
- return -EBUSY;
- }
- dev->irq_enabled = 1;
- mutex_unlock(&dev->struct_mutex);
-
- 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);
-
- /* Install handler */
- if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED))
- sh_flags = IRQF_SHARED;
-
- ret = request_irq(dev->irq, dev->driver->irq_handler,
- sh_flags, dev->devname, dev);
- if (ret < 0) {
- mutex_lock(&dev->struct_mutex);
- dev->irq_enabled = 0;
- mutex_unlock(&dev->struct_mutex);
- return ret;
- }
-
- /* After installing handler */
- dev->driver->irq_postinstall(dev);
-
- return 0;
-}
-
-/**
- * Uninstall the IRQ handler.
- *
- * \param dev DRM device.
- *
- * Calls the driver's \c drm_driver_irq_uninstall() function, and stops the irq.
- */
-int drm_irq_uninstall(struct drm_device * dev)
-{
- int irq_enabled;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
- return -EINVAL;
-
- mutex_lock(&dev->struct_mutex);
- irq_enabled = dev->irq_enabled;
- dev->irq_enabled = 0;
- mutex_unlock(&dev->struct_mutex);
-
- if (!irq_enabled)
- return -EINVAL;
-
- DRM_DEBUG("irq=%d\n", dev->irq);
-
- dev->driver->irq_uninstall(dev);
-
- free_irq(dev->irq, dev);
-
- dev->locked_tasklet_func = NULL;
-
- return 0;
-}
-
-EXPORT_SYMBOL(drm_irq_uninstall);
-
-/**
- * IRQ control ioctl.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_control structure.
- * \return zero on success or a negative number on failure.
- *
- * Calls irq_install() or irq_uninstall() according to \p arg.
- */
-int drm_control(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_control *ctl = data;
-
- /* if we haven't irq we fallback for compatibility reasons - this used to be a separate function in drm_dma.h */
-
-
- switch (ctl->func) {
- case DRM_INST_HANDLER:
- 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 -EINVAL;
- return drm_irq_install(dev);
- case DRM_UNINST_HANDLER:
- if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
- return 0;
- return drm_irq_uninstall(dev);
- default:
- return -EINVAL;
- }
-}
-
-/**
- * Wait for VBLANK.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param data user argument, pointing to a drm_wait_vblank structure.
- * \return zero on success or a negative number on failure.
- *
- * Verifies the IRQ is installed.
- *
- * If a signal is requested checks if this task has already scheduled the same signal
- * for the same vblank sequence number - nothing to be done in
- * that case. If the number of tasks waiting for the interrupt exceeds 100 the
- * function fails. Otherwise adds a new entry to drm_device::vbl_sigs for this
- * task.
- *
- * 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)
-{
- union drm_wait_vblank *vblwait = data;
- struct timeval now;
- int ret = 0;
- unsigned int flags, seq;
-
- if ((!dev->irq) || (!dev->irq_enabled))
- 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;
- }
-
- flags = vblwait->request.type & _DRM_VBLANK_FLAGS_MASK;
-
- if (!drm_core_check_feature(dev, (flags & _DRM_VBLANK_SECONDARY) ?
- DRIVER_IRQ_VBL2 : DRIVER_IRQ_VBL))
- return -EINVAL;
-
- 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:
- vblwait->request.sequence += seq;
- vblwait->request.type &= ~_DRM_VBLANK_RELATIVE;
- case _DRM_VBLANK_ABSOLUTE:
- break;
- default:
- return -EINVAL;
- }
-
- if ((flags & _DRM_VBLANK_NEXTONMISS) &&
- (seq - vblwait->request.sequence) <= (1<<23)) {
- vblwait->request.sequence = seq + 1;
- }
-
- if (flags & _DRM_VBLANK_SIGNAL) {
- unsigned long irqflags;
- 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);
-
- /* Check if this task has already scheduled the same signal
- * for the same vblank sequence number; nothing to be done in
- * that case
- */
- list_for_each_entry(vbl_sig, vbl_sigs, head) {
- if (vbl_sig->sequence == vblwait->request.sequence
- && vbl_sig->info.si_signo ==
- vblwait->request.signal
- && vbl_sig->task == current) {
- spin_unlock_irqrestore(&dev->vbl_lock,
- irqflags);
- vblwait->reply.sequence = seq;
- goto done;
- }
- }
-
- if (dev->vbl_pending >= 100) {
- spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
- return -EBUSY;
- }
-
- dev->vbl_pending++;
-
- spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
-
- if (!
- (vbl_sig =
- drm_alloc(sizeof(struct drm_vbl_sig), DRM_MEM_DRIVER))) {
- return -ENOMEM;
- }
-
- memset((void *)vbl_sig, 0, sizeof(*vbl_sig));
-
- vbl_sig->sequence = vblwait->request.sequence;
- vbl_sig->info.si_signo = vblwait->request.signal;
- vbl_sig->task = current;
-
- spin_lock_irqsave(&dev->vbl_lock, irqflags);
-
- list_add_tail(&vbl_sig->head, vbl_sigs);
-
- spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
-
- vblwait->reply.sequence = seq;
- } else {
- 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;
- }
-
- done:
- return ret;
-}
-
-/**
- * Send the VBLANK signals.
- *
- * \param dev DRM device.
- *
- * 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().
- */
-void drm_vbl_send_signals(struct drm_device * dev)
-{
- unsigned long flags;
- int i;
-
- spin_lock_irqsave(&dev->vbl_lock, flags);
-
- 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_del(&vbl_sig->head);
-
- drm_free(vbl_sig, sizeof(*vbl_sig),
- DRM_MEM_DRIVER);
-
- dev->vbl_pending--;
- }
- }
- }
-
- spin_unlock_irqrestore(&dev->vbl_lock, flags);
-}
-
-EXPORT_SYMBOL(drm_vbl_send_signals);
-
-/**
- * Tasklet wrapper function.
- *
- * \param data DRM device in disguise.
- *
- * Attempts to grab the HW lock and calls the driver callback on success. On
- * failure, leave the lock marked as contended so the callback can be called
- * from drm_unlock().
- */
-static void drm_locked_tasklet_func(unsigned long data)
-{
- struct drm_device *dev = (struct drm_device *)data;
- unsigned long irqflags;
-
- spin_lock_irqsave(&dev->tasklet_lock, irqflags);
-
- if (!dev->locked_tasklet_func ||
- !drm_lock_take(&dev->lock,
- DRM_KERNEL_CONTEXT)) {
- spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
- return;
- }
-
- dev->lock.lock_time = jiffies;
- atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
-
- dev->locked_tasklet_func(dev);
-
- drm_lock_free(&dev->lock,
- DRM_KERNEL_CONTEXT);
-
- dev->locked_tasklet_func = NULL;
-
- spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
-}
-
-/**
- * Schedule a tasklet to call back a driver hook with the HW lock held.
- *
- * \param dev DRM device.
- * \param func Driver callback.
- *
- * This is intended for triggering actions that require the HW lock from an
- * interrupt handler. The lock will be grabbed ASAP after the interrupt handler
- * completes. Note that the callback may be called from interrupt or process
- * context, it must not make any assumptions about this. Also, the HW lock will
- * be held with the kernel context or any client context.
- */
-void drm_locked_tasklet(struct drm_device *dev, void (*func)(struct drm_device *))
-{
- unsigned long irqflags;
- static DECLARE_TASKLET(drm_tasklet, drm_locked_tasklet_func, 0);
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ) ||
- test_bit(TASKLET_STATE_SCHED, &drm_tasklet.state))
- return;
-
- spin_lock_irqsave(&dev->tasklet_lock, irqflags);
-
- if (dev->locked_tasklet_func) {
- spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
- return;
- }
-
- dev->locked_tasklet_func = func;
-
- spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
-
- drm_tasklet.data = (unsigned long)dev;
-
- tasklet_hi_schedule(&drm_tasklet);
-}
-EXPORT_SYMBOL(drm_locked_tasklet);