285 lines
6.8 KiB
C
285 lines
6.8 KiB
C
/* drm_dma.c -- DMA IOCTL and function support
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* Created: Fri Oct 18 2003 by anholt@FreeBSD.org
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*
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* Copyright 2003 Eric Anholt
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* 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 NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <anholt@FreeBSD.org>
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*
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*/
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#include "drmP.h"
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#include "drm.h"
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int drm_irq_by_busid(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_irq_busid_t irq;
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DRM_COPY_FROM_USER_IOCTL(irq, (drm_irq_busid_t *)data, sizeof(irq));
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if ((irq.busnum >> 8) != dev->pci_domain ||
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(irq.busnum & 0xff) != dev->pci_bus ||
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irq.devnum != dev->pci_slot ||
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irq.funcnum != dev->pci_func)
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return EINVAL;
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irq.irq = dev->irq;
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DRM_DEBUG("%d:%d:%d => IRQ %d\n",
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irq.busnum, irq.devnum, irq.funcnum, irq.irq);
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DRM_COPY_TO_USER_IOCTL( (drm_irq_busid_t *)data, irq, sizeof(irq) );
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return 0;
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}
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#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
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static irqreturn_t
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drm_irq_handler_wrap(DRM_IRQ_ARGS)
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{
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drm_device_t *dev = (drm_device_t *)arg;
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DRM_SPINLOCK(&dev->irq_lock);
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dev->irq_handler(arg);
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DRM_SPINUNLOCK(&dev->irq_lock);
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}
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#endif
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int drm_irq_install(drm_device_t *dev)
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{
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int retcode;
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if (dev->irq == 0 || dev->dev_private == NULL)
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return DRM_ERR(EINVAL);
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DRM_LOCK();
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if (dev->irq_enabled) {
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DRM_UNLOCK();
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return DRM_ERR(EBUSY);
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}
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dev->irq_enabled = 1;
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DRM_UNLOCK();
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DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
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dev->context_flag = 0;
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dev->dma->next_buffer = NULL;
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dev->dma->this_buffer = NULL;
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DRM_SPININIT(dev->irq_lock, "DRM IRQ lock");
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/* Before installing handler */
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dev->irq_preinstall(dev);
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/* Install handler */
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#ifdef __FreeBSD__
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dev->irqrid = 0;
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dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
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&dev->irqrid, RF_SHAREABLE);
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if (!dev->irqr) {
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retcode = ENOENT;
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goto err;
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}
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#if __FreeBSD_version < 500000
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retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY,
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dev->irq_handler, dev, &dev->irqh);
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#else
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retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY | INTR_MPSAFE,
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drm_irq_handler_wrap, dev, &dev->irqh);
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#endif
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if (retcode != 0)
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goto err;
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#elif defined(__NetBSD__)
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if (pci_intr_map(&dev->pa, &dev->ih) != 0) {
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retcode = ENOENT;
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goto err;
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}
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dev->irqh = pci_intr_establish(&dev->pa.pa_pc, dev->ih, IPL_TTY,
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(irqreturn_t (*)(DRM_IRQ_ARGS))dev->irq_handler, dev);
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if (!dev->irqh) {
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retcode = ENOENT;
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goto err;
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}
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#endif
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/* After installing handler */
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dev->irq_postinstall(dev);
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return 0;
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err:
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DRM_LOCK();
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dev->irq_enabled = 0;
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#ifdef ___FreeBSD__
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if (dev->irqrid != 0) {
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bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
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dev->irqr);
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dev->irqrid = 0;
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}
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#endif
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DRM_SPINUNINIT(dev->irq_lock);
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DRM_UNLOCK();
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return retcode;
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}
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/* XXX: This function needs to be called with the device lock held. In some
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* cases it isn't, so far.
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*/
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int drm_irq_uninstall(drm_device_t *dev)
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{
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int irqrid;
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if (!dev->irq_enabled)
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return DRM_ERR(EINVAL);
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dev->irq_enabled = 0;
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irqrid = dev->irqrid;
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dev->irqrid = 0;
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DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
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dev->irq_uninstall(dev);
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#ifdef __FreeBSD__
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bus_teardown_intr(dev->device, dev->irqr, dev->irqh);
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bus_release_resource(dev->device, SYS_RES_IRQ, irqrid, dev->irqr);
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#elif defined(__NetBSD__)
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pci_intr_disestablish(&dev->pa.pa_pc, dev->irqh);
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#endif
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DRM_SPINUNINIT(dev->irq_lock);
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return 0;
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}
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int drm_control(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_control_t ctl;
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int err;
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DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) );
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switch ( ctl.func ) {
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case DRM_INST_HANDLER:
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/* Handle drivers whose DRM used to require IRQ setup but the
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* no longer does.
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*/
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if (!dev->use_irq)
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return 0;
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if (dev->if_version < DRM_IF_VERSION(1, 2) &&
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ctl.irq != dev->irq)
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return DRM_ERR(EINVAL);
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return drm_irq_install(dev);
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case DRM_UNINST_HANDLER:
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if (!dev->use_irq)
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return 0;
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DRM_LOCK();
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err = drm_irq_uninstall(dev);
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DRM_UNLOCK();
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return err;
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default:
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return DRM_ERR(EINVAL);
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}
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}
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int drm_wait_vblank(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_wait_vblank_t vblwait;
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struct timeval now;
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int ret;
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if (!dev->irq_enabled)
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return DRM_ERR(EINVAL);
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DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data,
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sizeof(vblwait) );
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if (vblwait.request.type & _DRM_VBLANK_RELATIVE) {
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vblwait.request.sequence += atomic_read(&dev->vbl_received);
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vblwait.request.type &= ~_DRM_VBLANK_RELATIVE;
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}
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flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK;
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if (flags & _DRM_VBLANK_SIGNAL) {
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#if 0 /* disabled */
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drm_vbl_sig_t *vbl_sig = DRM_MALLOC(sizeof(drm_vbl_sig_t));
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if (vbl_sig == NULL)
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return ENOMEM;
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bzero(vbl_sig, sizeof(*vbl_sig));
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vbl_sig->sequence = vblwait.request.sequence;
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vbl_sig->signo = vblwait.request.signal;
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vbl_sig->pid = DRM_CURRENTPID;
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vblwait.reply.sequence = atomic_read(&dev->vbl_received);
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DRM_SPINLOCK(&dev->irq_lock);
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TAILQ_INSERT_HEAD(&dev->vbl_sig_list, vbl_sig, link);
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DRM_SPINUNLOCK(&dev->irq_lock);
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ret = 0;
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#endif
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ret = EINVAL;
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} else {
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ret = dev->vblank_wait(dev, &vblwait.request.sequence);
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microtime(&now);
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vblwait.reply.tval_sec = now.tv_sec;
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vblwait.reply.tval_usec = now.tv_usec;
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}
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DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait,
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sizeof(vblwait) );
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return ret;
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}
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void drm_vbl_send_signals(drm_device_t *dev)
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{
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}
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#if 0 /* disabled */
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void drm_vbl_send_signals( drm_device_t *dev )
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{
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drm_vbl_sig_t *vbl_sig;
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unsigned int vbl_seq = atomic_read( &dev->vbl_received );
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struct proc *p;
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vbl_sig = TAILQ_FIRST(&dev->vbl_sig_list);
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while (vbl_sig != NULL) {
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drm_vbl_sig_t *next = TAILQ_NEXT(vbl_sig, link);
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if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
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p = pfind(vbl_sig->pid);
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if (p != NULL)
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psignal(p, vbl_sig->signo);
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TAILQ_REMOVE(&dev->vbl_sig_list, vbl_sig, link);
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DRM_FREE(vbl_sig,sizeof(*vbl_sig));
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}
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vbl_sig = next;
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}
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}
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#endif
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