1 /*- 2 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. 3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * Rickard E. (Rik) Faith <faith@valinux.com> 27 * Gareth Hughes <gareth@valinux.com> 28 * 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 /** @file drm_dma.c 35 * Support code for DMA buffer management. 36 * 37 * The implementation used to be significantly more complicated, but the 38 * complexity has been moved into the drivers as different buffer management 39 * schemes evolved. 40 */ 41 42 #include <dev/drm2/drmP.h> 43 44 int drm_dma_setup(struct drm_device *dev) 45 { 46 47 dev->dma = malloc(sizeof(*dev->dma), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO); 48 if (dev->dma == NULL) 49 return ENOMEM; 50 51 DRM_SPININIT(&dev->dma_lock, "drmdma"); 52 53 return 0; 54 } 55 56 void drm_dma_takedown(struct drm_device *dev) 57 { 58 drm_device_dma_t *dma = dev->dma; 59 int i, j; 60 61 if (dma == NULL) 62 return; 63 64 /* Clear dma buffers */ 65 for (i = 0; i <= DRM_MAX_ORDER; i++) { 66 if (dma->bufs[i].seg_count) { 67 DRM_DEBUG("order %d: buf_count = %d," 68 " seg_count = %d\n", i, dma->bufs[i].buf_count, 69 dma->bufs[i].seg_count); 70 for (j = 0; j < dma->bufs[i].seg_count; j++) { 71 drm_pci_free(dev, dma->bufs[i].seglist[j]); 72 } 73 free(dma->bufs[i].seglist, DRM_MEM_SEGS); 74 } 75 76 if (dma->bufs[i].buf_count) { 77 for (j = 0; j < dma->bufs[i].buf_count; j++) { 78 free(dma->bufs[i].buflist[j].dev_private, 79 DRM_MEM_BUFS); 80 } 81 free(dma->bufs[i].buflist, DRM_MEM_BUFS); 82 } 83 } 84 85 free(dma->buflist, DRM_MEM_BUFS); 86 free(dma->pagelist, DRM_MEM_PAGES); 87 free(dev->dma, DRM_MEM_DRIVER); 88 dev->dma = NULL; 89 DRM_SPINUNINIT(&dev->dma_lock); 90 } 91 92 93 void drm_free_buffer(struct drm_device *dev, drm_buf_t *buf) 94 { 95 if (!buf) 96 return; 97 98 buf->pending = 0; 99 buf->file_priv= NULL; 100 buf->used = 0; 101 } 102 103 void drm_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv) 104 { 105 drm_device_dma_t *dma = dev->dma; 106 int i; 107 108 if (!dma) 109 return; 110 111 for (i = 0; i < dma->buf_count; i++) { 112 if (dma->buflist[i]->file_priv == file_priv) { 113 switch (dma->buflist[i]->list) { 114 case DRM_LIST_NONE: 115 drm_free_buffer(dev, dma->buflist[i]); 116 break; 117 case DRM_LIST_WAIT: 118 dma->buflist[i]->list = DRM_LIST_RECLAIM; 119 break; 120 default: 121 /* Buffer already on hardware. */ 122 break; 123 } 124 } 125 } 126 } 127 128 /* Call into the driver-specific DMA handler */ 129 int drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv) 130 { 131 132 if (dev->driver->dma_ioctl) { 133 /* shared code returns -errno */ 134 return -dev->driver->dma_ioctl(dev, data, file_priv); 135 } else { 136 DRM_DEBUG("DMA ioctl on driver with no dma handler\n"); 137 return EINVAL; 138 } 139 } 140