1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* BEGIN CSTYLED */ 7 8 /* drm_scatter.h -- IOCTLs to manage scatter/gather memory -*- linux-c -*- 9 * Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com */ 10 /*- 11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 12 * All Rights Reserved. 13 * 14 * Permission is hereby granted, free of charge, to any person obtaining a 15 * copy of this software and associated documentation files (the "Software"), 16 * to deal in the Software without restriction, including without limitation 17 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 18 * and/or sell copies of the Software, and to permit persons to whom the 19 * Software is furnished to do so, subject to the following conditions: 20 * 21 * The above copyright notice and this permission notice (including the next 22 * paragraph) shall be included in all copies or substantial portions of the 23 * Software. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 28 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 31 * DEALINGS IN THE SOFTWARE. 32 * 33 * Authors: 34 * Gareth Hughes <gareth@valinux.com> 35 * Eric Anholt <anholt@FreeBSD.org> 36 * 37 */ 38 /* END CSTYLED */ 39 40 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 #include "drmP.h" 43 #include <gfx_private.h> 44 #include "drm_io32.h" 45 46 #define DEBUG_SCATTER 0 47 48 #ifdef _LP64 49 #define ScatterHandle(x) (unsigned int)((x >> 32) + (x & ((1L << 32) - 1))) 50 #else 51 #define ScatterHandle(x) (unsigned int)(x) 52 #endif 53 54 void 55 drm_sg_cleanup(drm_device_t *dev, drm_sg_mem_t *entry) 56 { 57 int pages = entry->pages; 58 59 if (entry->busaddr) { 60 kmem_free(entry->busaddr, sizeof (*entry->busaddr) * pages); 61 entry->busaddr = NULL; 62 } 63 64 ASSERT(entry->umem_cookie == NULL); 65 66 if (entry->dmah_sg) { 67 drm_pci_free(dev, entry->dmah_sg); 68 entry->dmah_sg = NULL; 69 } 70 71 if (entry->dmah_gart) { 72 drm_pci_free(dev, entry->dmah_gart); 73 entry->dmah_gart = NULL; 74 } 75 76 if (entry) { 77 drm_free(entry, sizeof (drm_sg_mem_t), DRM_MEM_SGLISTS); 78 entry = NULL; 79 } 80 } 81 82 /*ARGSUSED*/ 83 int 84 drm_sg_alloc(DRM_IOCTL_ARGS) 85 { 86 DRM_DEVICE; 87 unsigned long pages; 88 drm_sg_mem_t *entry; 89 drm_dma_handle_t *dmah; 90 drm_scatter_gather_t request; 91 92 DRM_DEBUG("%s\n", "drm_sg_alloc"); 93 94 if (dev->sg) 95 return (EINVAL); 96 97 #ifdef _MULTI_DATAMODEL 98 if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32) { 99 drm_scatter_gather_32_t request32; 100 101 DRM_COPYFROM_WITH_RETURN(&request32, (void *)data, 102 sizeof (request32)); 103 request.size = request32.size; 104 request.handle = request32.handle; 105 } else 106 #endif 107 DRM_COPYFROM_WITH_RETURN(&request, (void *)data, 108 sizeof (request)); 109 110 pages = btopr(request.size); 111 DRM_DEBUG("sg size=%ld pages=%ld\n", request.size, pages); 112 entry = kmem_zalloc(sizeof (*entry), KM_SLEEP); 113 entry->pages = (int)pages; 114 dmah = drm_pci_alloc(dev, ptob(pages), 4096, 0xfffffffful, pages); 115 if (dmah == NULL) 116 goto err_exit; 117 entry->busaddr = (void *)kmem_zalloc(sizeof (*entry->busaddr) * 118 pages, KM_SLEEP); 119 120 entry->handle = ScatterHandle((unsigned long)dmah->vaddr); 121 entry->virtual = (void *)dmah->vaddr; 122 request.handle = entry->handle; 123 entry->dmah_sg = dmah; 124 #ifdef _MULTI_DATAMODEL 125 if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32) { 126 drm_scatter_gather_32_t data32; 127 128 data32.size = (uint32_t)request.size; 129 data32.handle = (uint32_t)request.handle; 130 131 DRM_COPYTO_WITH_RETURN((void *)data, &data32, 132 sizeof (data32)); 133 } else 134 #endif 135 DRM_COPYTO_WITH_RETURN((void *)data, &request, 136 sizeof (request)); 137 138 DRM_LOCK(); 139 if (dev->sg) { 140 DRM_UNLOCK(); 141 drm_sg_cleanup(dev, entry); 142 return (EINVAL); 143 } 144 dev->sg = entry; 145 DRM_UNLOCK(); 146 147 return (0); 148 149 err_exit: 150 drm_sg_cleanup(dev, entry); 151 return (ENOMEM); 152 } 153 154 /*ARGSUSED*/ 155 int 156 drm_sg_free(DRM_IOCTL_ARGS) 157 { 158 DRM_DEVICE; 159 drm_scatter_gather_t request; 160 drm_sg_mem_t *entry; 161 162 #ifdef _MULTI_DATAMODEL 163 if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32) { 164 drm_scatter_gather_32_t request32; 165 166 DRM_COPYFROM_WITH_RETURN(&request32, (void *)data, 167 sizeof (request32)); 168 request.size = request32.size; 169 request.handle = request32.handle; 170 } else 171 #endif 172 DRM_COPYFROM_WITH_RETURN(&request, (void *)data, 173 sizeof (request)); 174 175 DRM_LOCK(); 176 entry = dev->sg; 177 dev->sg = NULL; 178 DRM_UNLOCK(); 179 180 if (!entry || entry->handle != request.handle) 181 return (EINVAL); 182 183 drm_sg_cleanup(dev, entry); 184 185 return (0); 186 } 187