/* 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 */