1 /* 2 * Copyright 2011 Red Hat Inc. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 19 * USE OR OTHER DEALINGS IN THE SOFTWARE. 20 * 21 * The above copyright notice and this permission notice (including the 22 * next paragraph) shall be included in all copies or substantial portions 23 * of the Software. 24 * 25 */ 26 /* 27 * Authors: 28 * Jerome Glisse <glisse@freedesktop.org> 29 */ 30 /* Algorithm: 31 * 32 * We store the last allocated bo in "hole", we always try to allocate 33 * after the last allocated bo. Principle is that in a linear GPU ring 34 * progression was is after last is the oldest bo we allocated and thus 35 * the first one that should no longer be in use by the GPU. 36 * 37 * If it's not the case we skip over the bo after last to the closest 38 * done bo if such one exist. If none exist and we are not asked to 39 * block we report failure to allocate. 40 * 41 * If we are asked to block we wait on all the oldest fence of all 42 * rings. We just wait for any of those fence to complete. 43 */ 44 45 #include "amdgpu.h" 46 47 int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev, 48 struct amdgpu_sa_manager *sa_manager, 49 unsigned int size, gfp_t gfp_flags) 50 { 51 int r; 52 53 sa_manager->gfp_flags = gfp_flags; 54 r = amdgpu_bo_create_kernel(adev, size, AMDGPU_GPU_PAGE_SIZE, 55 AMDGPU_GEM_DOMAIN_GTT, 56 &sa_manager->bo, &sa_manager->gpu_addr, 57 &sa_manager->cpu_ptr); 58 if (r) { 59 dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r); 60 return r; 61 } 62 63 memset(sa_manager->cpu_ptr, 0, size); 64 drm_suballoc_manager_init(&sa_manager->base, size, 256); 65 66 return r; 67 } 68 69 void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev, 70 struct amdgpu_sa_manager *sa_manager) 71 { 72 if (sa_manager->bo == NULL) { 73 dev_err(adev->dev, "no bo for sa manager\n"); 74 return; 75 } 76 77 drm_suballoc_manager_fini(&sa_manager->base); 78 79 amdgpu_bo_free_kernel(&sa_manager->bo, &sa_manager->gpu_addr, 80 &sa_manager->cpu_ptr); 81 } 82 83 int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager, 84 struct drm_suballoc **sa_bo, 85 unsigned int size) 86 { 87 struct drm_suballoc *sa = drm_suballoc_new(&sa_manager->base, size, 88 sa_manager->gfp_flags, 89 false, 0); 90 91 if (IS_ERR(sa)) { 92 *sa_bo = NULL; 93 94 return PTR_ERR(sa); 95 } 96 97 *sa_bo = sa; 98 return 0; 99 } 100 101 void amdgpu_sa_bo_free(struct drm_suballoc **sa_bo, struct dma_fence *fence) 102 { 103 if (sa_bo == NULL || *sa_bo == NULL) { 104 return; 105 } 106 107 drm_suballoc_free(*sa_bo, fence); 108 *sa_bo = NULL; 109 } 110 111 #if defined(CONFIG_DEBUG_FS) 112 113 void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager, 114 struct seq_file *m) 115 { 116 struct drm_printer p = drm_seq_file_printer(m); 117 118 drm_suballoc_dump_debug_info(&sa_manager->base, &p, 119 sa_manager->gpu_addr); 120 } 121 #endif 122