389 lines
9.0 KiB
C
389 lines
9.0 KiB
C
/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
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* Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
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*
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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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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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Gareth Hughes <gareth@valinux.com>
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*
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*/
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#include "drmP.h"
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#ifndef __HAVE_DMA_WAITQUEUE
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#define __HAVE_DMA_WAITQUEUE 0
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#endif
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#ifndef __HAVE_DMA_RECLAIM
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#define __HAVE_DMA_RECLAIM 0
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#endif
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#ifndef __HAVE_SHARED_IRQ
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#define __HAVE_SHARED_IRQ 0
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#endif
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#if __HAVE_DMA
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int DRM(dma_setup)( drm_device_t *dev )
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{
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int i;
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dev->dma = DRM(alloc)( sizeof(*dev->dma), DRM_MEM_DRIVER );
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if ( !dev->dma )
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return DRM_ERR(ENOMEM);
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memset( dev->dma, 0, sizeof(*dev->dma) );
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for ( i = 0 ; i <= DRM_MAX_ORDER ; i++ )
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memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0]));
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return 0;
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}
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void DRM(dma_takedown)(drm_device_t *dev)
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{
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drm_device_dma_t *dma = dev->dma;
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int i, j;
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if (!dma) return;
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/* Clear dma buffers */
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for (i = 0; i <= DRM_MAX_ORDER; i++) {
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#if __HAVE_PCI_DMA
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if (dma->bufs[i].seg_count) {
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DRM_DEBUG("order %d: buf_count = %d,"
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" seg_count = %d\n",
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i,
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dma->bufs[i].buf_count,
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dma->bufs[i].seg_count);
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for (j = 0; j < dma->bufs[i].seg_count; j++) {
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if (dma->bufs[i].seglist[j] != NULL)
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DRM(pci_free)(dev, dma->bufs[i].buf_size,
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(void *)dma->bufs[i].seglist[j],
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dma->bufs[i].seglist_bus[j]);
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}
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DRM(free)(dma->bufs[i].seglist,
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dma->bufs[i].seg_count
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* sizeof(*dma->bufs[0].seglist),
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DRM_MEM_SEGS);
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DRM(free)(dma->bufs[i].seglist_bus,
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dma->bufs[i].seg_count
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* sizeof(*dma->bufs[0].seglist_bus),
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DRM_MEM_SEGS);
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}
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#endif /* __HAVE_PCI_DMA */
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if (dma->bufs[i].buf_count) {
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for (j = 0; j < dma->bufs[i].buf_count; j++) {
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DRM(free)(dma->bufs[i].buflist[j].dev_private,
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dma->bufs[i].buflist[j].dev_priv_size,
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DRM_MEM_BUFS);
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}
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DRM(free)(dma->bufs[i].buflist,
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dma->bufs[i].buf_count *
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sizeof(*dma->bufs[0].buflist),
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DRM_MEM_BUFS);
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}
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}
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DRM(free)(dma->buflist, dma->buf_count * sizeof(*dma->buflist),
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DRM_MEM_BUFS);
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DRM(free)(dma->pagelist, dma->page_count * sizeof(*dma->pagelist),
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DRM_MEM_PAGES);
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DRM(free)(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER);
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dev->dma = NULL;
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}
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void DRM(free_buffer)(drm_device_t *dev, drm_buf_t *buf)
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{
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if (!buf) return;
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buf->pending = 0;
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buf->filp = NULL;
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buf->used = 0;
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}
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#if !__HAVE_DMA_RECLAIM
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void DRM(reclaim_buffers)(drm_device_t *dev, DRMFILE filp)
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{
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drm_device_dma_t *dma = dev->dma;
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int i;
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if (!dma) return;
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for (i = 0; i < dma->buf_count; i++) {
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if (dma->buflist[i]->filp == filp) {
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switch (dma->buflist[i]->list) {
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case DRM_LIST_NONE:
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DRM(free_buffer)(dev, dma->buflist[i]);
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break;
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case DRM_LIST_WAIT:
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dma->buflist[i]->list = DRM_LIST_RECLAIM;
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break;
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default:
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/* Buffer already on hardware. */
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break;
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}
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}
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}
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}
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#endif
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#if __HAVE_DMA_IRQ
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int DRM(irq_install)( drm_device_t *dev, int irq )
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{
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int retcode;
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if ( 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 ) {
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DRM_UNLOCK();
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return DRM_ERR(EBUSY);
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}
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dev->irq = irq;
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DRM_UNLOCK();
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DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, 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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#if __HAVE_DMA_IRQ_BH
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TASK_INIT(&dev->task, 0, DRM(dma_immediate_bh), dev);
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#endif
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#if __HAVE_VBL_IRQ && 0 /* disabled */
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DRM_SPININIT( dev->vbl_lock, "vblsig" );
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TAILQ_INIT( &dev->vbl_sig_list );
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#endif
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/* Before installing handler */
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DRM(driver_irq_preinstall)( dev );
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/* Install handler */
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dev->irqrid = 0;
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#ifdef __FreeBSD__
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dev->irqr = bus_alloc_resource(dev->device, SYS_RES_IRQ, &dev->irqrid,
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0, ~0, 1, RF_SHAREABLE);
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if (!dev->irqr) {
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#elif defined(__NetBSD__)
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if (pci_intr_map(&dev->pa, &dev->ih) != 0) {
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#endif
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DRM_LOCK();
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dev->irq = 0;
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dev->irqrid = 0;
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DRM_UNLOCK();
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return ENOENT;
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}
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#ifdef __FreeBSD__
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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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DRM(dma_service), 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(dma_service), dev, &dev->irqh);
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#endif
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if ( retcode ) {
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#elif defined(__NetBSD__)
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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))DRM(dma_service), dev);
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if ( !dev->irqh ) {
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#endif
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DRM_LOCK();
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#ifdef __FreeBSD__
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bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid, dev->irqr);
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#endif
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dev->irq = 0;
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dev->irqrid = 0;
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DRM_UNLOCK();
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return retcode;
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}
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/* After installing handler */
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DRM(driver_irq_postinstall)( dev );
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return 0;
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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 irq;
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int irqrid;
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DRM_LOCK();
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irq = dev->irq;
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irqrid = dev->irqrid;
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dev->irq = 0;
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dev->irqrid = 0;
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DRM_UNLOCK();
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if ( !irq )
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return DRM_ERR(EINVAL);
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DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, irq );
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DRM(driver_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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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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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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return DRM(irq_install)( dev, ctl.irq );
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case DRM_UNINST_HANDLER:
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return DRM(irq_uninstall)( dev );
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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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#if __HAVE_VBL_IRQ
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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)
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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->vbl_lock);
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TAILQ_INSERT_HEAD(&dev->vbl_sig_list, vbl_sig, link);
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DRM_SPINUNLOCK(&dev->vbl_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 = DRM(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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DRM_SPINLOCK(&dev->vbl_lock);
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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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DRM_SPINUNLOCK(&dev->vbl_lock);
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}
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#endif
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#endif /* __HAVE_VBL_IRQ */
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#else
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int DRM(control)( DRM_IOCTL_ARGS )
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{
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drm_control_t ctl;
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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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case DRM_UNINST_HANDLER:
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return 0;
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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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#endif /* __HAVE_DMA_IRQ */
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#endif /* __HAVE_DMA */
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