diff options
Diffstat (limited to 'sys/dev/drm/drm_dma.h')
| -rw-r--r-- | sys/dev/drm/drm_dma.h | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/sys/dev/drm/drm_dma.h b/sys/dev/drm/drm_dma.h new file mode 100644 index 0000000..99cabba --- /dev/null +++ b/sys/dev/drm/drm_dma.h @@ -0,0 +1,390 @@ +/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*- + * 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. + * + * Authors: + * Rickard E. (Rik) Faith <faith@valinux.com> + * Gareth Hughes <gareth@valinux.com> + * + * $FreeBSD$ + */ + +#include "dev/drm/drmP.h" + +#ifndef __HAVE_DMA_WAITQUEUE +#define __HAVE_DMA_WAITQUEUE 0 +#endif +#ifndef __HAVE_DMA_RECLAIM +#define __HAVE_DMA_RECLAIM 0 +#endif +#ifndef __HAVE_SHARED_IRQ +#define __HAVE_SHARED_IRQ 0 +#endif + +#if __HAVE_DMA + +int DRM(dma_setup)( drm_device_t *dev ) +{ + int i; + + dev->dma = DRM(alloc)( sizeof(*dev->dma), DRM_MEM_DRIVER ); + if ( !dev->dma ) + return DRM_ERR(ENOMEM); + + memset( dev->dma, 0, sizeof(*dev->dma) ); + + for ( i = 0 ; i <= DRM_MAX_ORDER ; i++ ) + memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0])); + + return 0; +} + +void DRM(dma_takedown)(drm_device_t *dev) +{ + drm_device_dma_t *dma = dev->dma; + int i, j; + + if (!dma) return; + + /* Clear dma buffers */ + for (i = 0; i <= DRM_MAX_ORDER; i++) { + if (dma->bufs[i].seg_count) { + DRM_DEBUG("order %d: buf_count = %d," + " seg_count = %d\n", + i, + dma->bufs[i].buf_count, + dma->bufs[i].seg_count); + for (j = 0; j < dma->bufs[i].seg_count; j++) { + DRM(free)((void *)dma->bufs[i].seglist[j], + dma->bufs[i].buf_size, + DRM_MEM_DMA); + } + DRM(free)(dma->bufs[i].seglist, + dma->bufs[i].seg_count + * sizeof(*dma->bufs[0].seglist), + DRM_MEM_SEGS); + } + if(dma->bufs[i].buf_count) { + for(j = 0; j < dma->bufs[i].buf_count; j++) { + if(dma->bufs[i].buflist[j].dev_private) { + DRM(free)(dma->bufs[i].buflist[j].dev_private, + dma->bufs[i].buflist[j].dev_priv_size, + DRM_MEM_BUFS); + } + } + DRM(free)(dma->bufs[i].buflist, + dma->bufs[i].buf_count * + sizeof(*dma->bufs[0].buflist), + DRM_MEM_BUFS); + } + } + + if (dma->buflist) { + DRM(free)(dma->buflist, + dma->buf_count * sizeof(*dma->buflist), + DRM_MEM_BUFS); + } + + if (dma->pagelist) { + DRM(free)(dma->pagelist, + dma->page_count * sizeof(*dma->pagelist), + DRM_MEM_PAGES); + } + DRM(free)(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER); + dev->dma = NULL; +} + + +void DRM(free_buffer)(drm_device_t *dev, drm_buf_t *buf) +{ + if (!buf) return; + + buf->pending = 0; + buf->filp = NULL; + buf->used = 0; +} + +#if !__HAVE_DMA_RECLAIM +void DRM(reclaim_buffers)(drm_device_t *dev, DRMFILE filp) +{ + drm_device_dma_t *dma = dev->dma; + int i; + + if (!dma) return; + for (i = 0; i < dma->buf_count; i++) { + if (dma->buflist[i]->filp == filp) { + switch (dma->buflist[i]->list) { + case DRM_LIST_NONE: + DRM(free_buffer)(dev, dma->buflist[i]); + break; + case DRM_LIST_WAIT: + dma->buflist[i]->list = DRM_LIST_RECLAIM; + break; + default: + /* Buffer already on hardware. */ + break; + } + } + } +} +#endif + + +#if __HAVE_DMA_IRQ + +int DRM(irq_install)( drm_device_t *dev, int irq ) +{ + int retcode; + + if ( !irq ) + return DRM_ERR(EINVAL); + + DRM_LOCK; + if ( dev->irq ) { + DRM_UNLOCK; + return DRM_ERR(EBUSY); + } + dev->irq = irq; + DRM_UNLOCK; + + DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, irq ); + + dev->context_flag = 0; + + dev->dma->next_buffer = NULL; + dev->dma->this_buffer = NULL; + +#if __HAVE_DMA_IRQ_BH + TASK_INIT(&dev->task, 0, DRM(dma_immediate_bh), dev); +#endif + +#if __HAVE_VBL_IRQ && 0 /* disabled */ + DRM_SPININIT( dev->vbl_lock, "vblsig" ); + TAILQ_INIT( &dev->vbl_sig_list ); +#endif + + /* Before installing handler */ + DRM(driver_irq_preinstall)( dev ); + + /* Install handler */ + dev->irqrid = 0; +#ifdef __FreeBSD__ + dev->irqr = bus_alloc_resource(dev->device, SYS_RES_IRQ, &dev->irqrid, + 0, ~0, 1, RF_SHAREABLE); + if (!dev->irqr) { +#elif defined(__NetBSD__) + if (pci_intr_map(&dev->pa, &dev->ih) != 0) { +#endif + DRM_LOCK; + dev->irq = 0; + dev->irqrid = 0; + DRM_UNLOCK; + return ENOENT; + } + +#ifdef __FreeBSD__ +#if __FreeBSD_version < 500000 + retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY, + DRM(dma_service), dev, &dev->irqh); +#else + retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY | INTR_MPSAFE, + DRM(dma_service), dev, &dev->irqh); +#endif + if ( retcode ) { +#elif defined(__NetBSD__) + dev->irqh = pci_intr_establish(&dev->pa.pa_pc, dev->ih, IPL_TTY, + (int (*)(DRM_IRQ_ARGS))DRM(dma_service), dev); + if ( !dev->irqh ) { +#endif + DRM_LOCK; +#ifdef __FreeBSD__ + bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid, dev->irqr); +#endif + dev->irq = 0; + dev->irqrid = 0; + DRM_UNLOCK; + return retcode; + } + + /* After installing handler */ + DRM(driver_irq_postinstall)( dev ); + + return 0; +} + +int DRM(irq_uninstall)( drm_device_t *dev ) +{ + int irq; + int irqrid; + + DRM_LOCK; + irq = dev->irq; + irqrid = dev->irqrid; + dev->irq = 0; + dev->irqrid = 0; + DRM_UNLOCK; + + if ( !irq ) + return DRM_ERR(EINVAL); + + DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, irq ); + + DRM(driver_irq_uninstall)( dev ); + +#ifdef __FreeBSD__ + bus_teardown_intr(dev->device, dev->irqr, dev->irqh); + bus_release_resource(dev->device, SYS_RES_IRQ, irqrid, dev->irqr); +#elif defined(__NetBSD__) + pci_intr_disestablish(&dev->pa.pa_pc, dev->irqh); +#endif + + return 0; +} + +int DRM(control)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_control_t ctl; + + DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) ); + + switch ( ctl.func ) { + case DRM_INST_HANDLER: + return DRM(irq_install)( dev, ctl.irq ); + case DRM_UNINST_HANDLER: + return DRM(irq_uninstall)( dev ); + default: + return DRM_ERR(EINVAL); + } +} + +#if __HAVE_VBL_IRQ +int DRM(wait_vblank)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_wait_vblank_t vblwait; + struct timeval now; + int ret; + + if (!dev->irq) + return DRM_ERR(EINVAL); + + DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data, + sizeof(vblwait) ); + + if (vblwait.request.type & _DRM_VBLANK_RELATIVE) { + vblwait.request.sequence += atomic_read(&dev->vbl_received); + vblwait.request.type &= ~_DRM_VBLANK_RELATIVE; + } + + flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK; + if (flags & _DRM_VBLANK_SIGNAL) { +#if 0 /* disabled */ + drm_vbl_sig_t *vbl_sig = DRM_MALLOC(sizeof(drm_vbl_sig_t)); + if (vbl_sig == NULL) + return ENOMEM; + bzero(vbl_sig, sizeof(*vbl_sig)); + + 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); + + DRM_SPINLOCK(&dev->vbl_lock); + TAILQ_INSERT_HEAD(&dev->vbl_sig_list, vbl_sig, link); + DRM_SPINUNLOCK(&dev->vbl_lock); + ret = 0; +#endif + ret = EINVAL; + } else { + ret = DRM(vblank_wait)(dev, &vblwait.request.sequence); + + microtime(&now); + vblwait.reply.tval_sec = now.tv_sec; + vblwait.reply.tval_usec = now.tv_usec; + } + + DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait, + sizeof(vblwait) ); + + return ret; +} + +void DRM(vbl_send_signals)(drm_device_t *dev) +{ +} + +#if 0 /* disabled */ +void DRM(vbl_send_signals)( drm_device_t *dev ) +{ + drm_vbl_sig_t *vbl_sig; + unsigned int vbl_seq = atomic_read( &dev->vbl_received ); + struct proc *p; + + DRM_SPINLOCK(&dev->vbl_lock); + + vbl_sig = TAILQ_FIRST(&dev->vbl_sig_list); + while (vbl_sig != NULL) { + drm_vbl_sig_t *next = TAILQ_NEXT(vbl_sig, link); + + if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) { + p = pfind(vbl_sig->pid); + if (p != NULL) + psignal(p, vbl_sig->signo); + + TAILQ_REMOVE(&dev->vbl_sig_list, vbl_sig, link); + DRM_FREE(vbl_sig,sizeof(*vbl_sig)); + } + vbl_sig = next; + } + + DRM_SPINUNLOCK(&dev->vbl_lock); +} +#endif + +#endif /* __HAVE_VBL_IRQ */ + +#else + +int DRM(control)( DRM_IOCTL_ARGS ) +{ + drm_control_t ctl; + + DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) ); + + switch ( ctl.func ) { + case DRM_INST_HANDLER: + case DRM_UNINST_HANDLER: + return 0; + default: + return DRM_ERR(EINVAL); + } +} + +#endif /* __HAVE_DMA_IRQ */ + +#endif /* __HAVE_DMA */ + |
