1 /************************************************************************** 2 * 3 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA 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 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 /* 28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> 29 * Keith Packard. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <dev/drm2/drmP.h> 36 #include <dev/drm2/ttm/ttm_module.h> 37 #include <dev/drm2/ttm/ttm_bo_driver.h> 38 #include <dev/drm2/ttm/ttm_page_alloc.h> 39 #ifdef TTM_HAS_AGP 40 #include <dev/drm2/ttm/ttm_placement.h> 41 42 struct ttm_agp_backend { 43 struct ttm_tt ttm; 44 vm_offset_t offset; 45 vm_page_t *pages; 46 device_t bridge; 47 }; 48 49 MALLOC_DEFINE(M_TTM_AGP, "ttm_agp", "TTM AGP Backend"); 50 51 static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem) 52 { 53 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); 54 struct drm_mm_node *node = bo_mem->mm_node; 55 int ret; 56 unsigned i; 57 58 for (i = 0; i < ttm->num_pages; i++) { 59 vm_page_t page = ttm->pages[i]; 60 61 if (!page) 62 page = ttm->dummy_read_page; 63 64 agp_be->pages[i] = page; 65 } 66 67 agp_be->offset = node->start * PAGE_SIZE; 68 ret = -agp_bind_pages(agp_be->bridge, agp_be->pages, 69 ttm->num_pages << PAGE_SHIFT, agp_be->offset); 70 if (ret) 71 printf("[TTM] AGP Bind memory failed\n"); 72 73 return ret; 74 } 75 76 static int ttm_agp_unbind(struct ttm_tt *ttm) 77 { 78 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); 79 80 return -agp_unbind_pages(agp_be->bridge, ttm->num_pages << PAGE_SHIFT, 81 agp_be->offset); 82 } 83 84 static void ttm_agp_destroy(struct ttm_tt *ttm) 85 { 86 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); 87 88 ttm_tt_fini(ttm); 89 free(agp_be->pages, M_TTM_AGP); 90 free(agp_be, M_TTM_AGP); 91 } 92 93 static struct ttm_backend_func ttm_agp_func = { 94 .bind = ttm_agp_bind, 95 .unbind = ttm_agp_unbind, 96 .destroy = ttm_agp_destroy, 97 }; 98 99 struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev, 100 device_t bridge, 101 unsigned long size, uint32_t page_flags, 102 vm_page_t dummy_read_page) 103 { 104 struct ttm_agp_backend *agp_be; 105 106 agp_be = malloc(sizeof(*agp_be), M_TTM_AGP, M_WAITOK | M_ZERO); 107 108 agp_be->bridge = bridge; 109 agp_be->ttm.func = &ttm_agp_func; 110 111 if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) { 112 free(agp_be, M_TTM_AGP); 113 return NULL; 114 } 115 116 agp_be->offset = 0; 117 agp_be->pages = malloc(agp_be->ttm.num_pages * sizeof(*agp_be->pages), 118 M_TTM_AGP, M_WAITOK); 119 120 return &agp_be->ttm; 121 } 122 123 int ttm_agp_tt_populate(struct ttm_tt *ttm) 124 { 125 if (ttm->state != tt_unpopulated) 126 return 0; 127 128 return ttm_pool_populate(ttm); 129 } 130 131 void ttm_agp_tt_unpopulate(struct ttm_tt *ttm) 132 { 133 ttm_pool_unpopulate(ttm); 134 } 135 136 #endif 137