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
 47int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev,
 48			      struct amdgpu_sa_manager *sa_manager,
 49			      unsigned int size, u32 suballoc_align, u32 domain)
 50{
 51	int r;
 52
 53	r = amdgpu_bo_create_kernel(adev, size, AMDGPU_GPU_PAGE_SIZE, domain,
 54				    &sa_manager->bo, &sa_manager->gpu_addr,
 55				    &sa_manager->cpu_ptr);
 56	if (r) {
 57		dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r);
 58		return r;
 59	}
 60
 61	memset(sa_manager->cpu_ptr, 0, size);
 62	drm_suballoc_manager_init(&sa_manager->base, size, suballoc_align);
 63	return r;
 64}
 65
 66void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev,
 67			       struct amdgpu_sa_manager *sa_manager)
 68{
 69	if (sa_manager->bo == NULL) {
 70		dev_err(adev->dev, "no bo for sa manager\n");
 71		return;
 72	}
 73
 74	drm_suballoc_manager_fini(&sa_manager->base);
 75
 76	amdgpu_bo_free_kernel(&sa_manager->bo, &sa_manager->gpu_addr, &sa_manager->cpu_ptr);
 77}
 78
 79int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager,
 80		     struct drm_suballoc **sa_bo,
 81		     unsigned int size)
 82{
 83	struct drm_suballoc *sa = drm_suballoc_new(&sa_manager->base, size,
 84						   GFP_KERNEL, false, 0);
 85
 86	if (IS_ERR(sa)) {
 87		*sa_bo = NULL;
 88
 89		return PTR_ERR(sa);
 90	}
 91
 92	*sa_bo = sa;
 93	return 0;
 94}
 95
 96void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct drm_suballoc **sa_bo,
 97		       struct dma_fence *fence)
 98{
 99	if (sa_bo == NULL || *sa_bo == NULL) {
100		return;
101	}
102
103	drm_suballoc_free(*sa_bo, fence);
104	*sa_bo = NULL;
105}
106
107#if defined(CONFIG_DEBUG_FS)
108
109void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager,
110				  struct seq_file *m)
111{
112	struct drm_printer p = drm_seq_file_printer(m);
113
114	drm_suballoc_dump_debug_info(&sa_manager->base, &p, sa_manager->gpu_addr);
115}
116#endif