diff options
Diffstat (limited to 'sys/dev/drm2/drm_dma.c')
| -rw-r--r-- | sys/dev/drm2/drm_dma.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/sys/dev/drm2/drm_dma.c b/sys/dev/drm2/drm_dma.c new file mode 100644 index 0000000000000..c0a1c809bf969 --- /dev/null +++ b/sys/dev/drm2/drm_dma.c @@ -0,0 +1,139 @@ +/*- + * 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> + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/** @file drm_dma.c + * Support code for DMA buffer management. + * + * The implementation used to be significantly more complicated, but the + * complexity has been moved into the drivers as different buffer management + * schemes evolved. + */ + +#include <dev/drm2/drmP.h> + +int drm_dma_setup(struct drm_device *dev) +{ + + dev->dma = malloc(sizeof(*dev->dma), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO); + if (dev->dma == NULL) + return ENOMEM; + + DRM_SPININIT(&dev->dma_lock, "drmdma"); + + return 0; +} + +void drm_dma_takedown(struct drm_device *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 (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_pci_free(dev, dma->bufs[i].seglist[j]); + } + free(dma->bufs[i].seglist, DRM_MEM_SEGS); + } + + if (dma->bufs[i].buf_count) { + for (j = 0; j < dma->bufs[i].buf_count; j++) { + free(dma->bufs[i].buflist[j].dev_private, + DRM_MEM_BUFS); + } + free(dma->bufs[i].buflist, DRM_MEM_BUFS); + } + } + + free(dma->buflist, DRM_MEM_BUFS); + free(dma->pagelist, DRM_MEM_PAGES); + free(dev->dma, DRM_MEM_DRIVER); + dev->dma = NULL; + DRM_SPINUNINIT(&dev->dma_lock); +} + + +void drm_free_buffer(struct drm_device *dev, drm_buf_t *buf) +{ + if (!buf) + return; + + buf->pending = 0; + buf->file_priv= NULL; + buf->used = 0; +} + +void drm_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv) +{ + drm_device_dma_t *dma = dev->dma; + int i; + + if (!dma) + return; + + for (i = 0; i < dma->buf_count; i++) { + if (dma->buflist[i]->file_priv == file_priv) { + 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; + } + } + } +} + +/* Call into the driver-specific DMA handler */ +int drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + + if (dev->driver->dma_ioctl) { + /* shared code returns -errno */ + return -dev->driver->dma_ioctl(dev, data, file_priv); + } else { + DRM_DEBUG("DMA ioctl on driver with no dma handler\n"); + return EINVAL; + } +} |