| /* 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> |
| * |
| */ |
| |
| #include "drmP.h" |
| |
| int drm_dma_setup(drm_device_t *dev) |
| { |
| |
| dev->dma = malloc(sizeof(*dev->dma), M_DRM, M_NOWAIT | M_ZERO); |
| 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 (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, M_DRM); |
| } |
| |
| if (dma->bufs[i].buf_count) { |
| for (j = 0; j < dma->bufs[i].buf_count; j++) { |
| free(dma->bufs[i].buflist[j].dev_private, |
| M_DRM); |
| } |
| free(dma->bufs[i].buflist, M_DRM); |
| } |
| } |
| |
| free(dma->buflist, M_DRM); |
| free(dma->pagelist, M_DRM); |
| free(dev->dma, M_DRM); |
| 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; |
| } |
| |
| 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; |
| } |
| } |
| } |
| } |
| |
| /* Call into the driver-specific DMA handler */ |
| int drm_dma(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| |
| if (dev->driver.dma_ioctl) { |
| return dev->driver.dma_ioctl(kdev, cmd, data, flags, p, filp); |
| } else { |
| DRM_DEBUG("DMA ioctl on driver with no dma handler\n"); |
| return EINVAL; |
| } |
| } |