Current Path : /sys/dev/drm/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/dev/drm/drm_dma.c |
/*- * 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: release/9.1.0/sys/dev/drm/drm_dma.c 183833 2008-10-13 18:03:27Z rnoland $"); /** @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/drm/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; } }