diff options
Diffstat (limited to 'sys/dev/drm/drm_dma.h')
| -rw-r--r-- | sys/dev/drm/drm_dma.h | 172 |
1 files changed, 172 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..7cf3d17 --- /dev/null +++ b/sys/dev/drm/drm_dma.h @@ -0,0 +1,172 @@ +/* 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 ) +{ + + dev->dma = DRM(calloc)(1, sizeof(*dev->dma), DRM_MEM_DRIVER); + if (dev->dma == NULL) + return DRM_ERR(ENOMEM); + + DRM_SPININIT(dev->dma_lock, "drmdma"); + + return 0; +} + +void DRM(dma_takedown)(drm_device_t *dev) +{ + drm_device_dma_t *dma = dev->dma; + int i, j; + + if (dma == NULL) + return; + + /* Clear dma buffers */ + for (i = 0; i <= DRM_MAX_ORDER; i++) { +#if __HAVE_PCI_DMA + 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++) { + if (dma->bufs[i].seglist[j] != 0) + DRM(pci_free)(dev, dma->bufs[i].buf_size, + (void *)dma->bufs[i].seglist[j], + dma->bufs[i].seglist_bus[j]); + } + DRM(free)(dma->bufs[i].seglist, + dma->bufs[i].seg_count + * sizeof(*dma->bufs[0].seglist), + DRM_MEM_SEGS); + DRM(free)(dma->bufs[i].seglist_bus, + dma->bufs[i].seg_count + * sizeof(*dma->bufs[0].seglist_bus), + DRM_MEM_SEGS); + } +#endif /* __HAVE_PCI_DMA */ + + if (dma->bufs[i].buf_count) { + for (j = 0; j < dma->bufs[i].buf_count; j++) { + 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); + } + } + + DRM(free)(dma->buflist, dma->buf_count * sizeof(*dma->buflist), + DRM_MEM_BUFS); + 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; + DRM_SPINUNINIT(dev->dma_lock); +} + + +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_IRQ +/* This stub DRM_IOCTL_CONTROL handler is for the drivers that used to require + * IRQs for DMA but no longer do. It maintains compatibility with the X Servers + * that try to use the control ioctl by simply returning success. + */ +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 + +#endif /* __HAVE_DMA */ |
