diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c new file mode 100644 index 0000000000..10df731998 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c @@ -0,0 +1,116 @@ +/* + * Copyright 2011 Red Hat Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + */ +/* + * Authors: + * Jerome Glisse <glisse@freedesktop.org> + */ +/* Algorithm: + * + * We store the last allocated bo in "hole", we always try to allocate + * after the last allocated bo. Principle is that in a linear GPU ring + * progression was is after last is the oldest bo we allocated and thus + * the first one that should no longer be in use by the GPU. + * + * If it's not the case we skip over the bo after last to the closest + * done bo if such one exist. If none exist and we are not asked to + * block we report failure to allocate. + * + * If we are asked to block we wait on all the oldest fence of all + * rings. We just wait for any of those fence to complete. + */ + +#include "amdgpu.h" + +int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev, + struct amdgpu_sa_manager *sa_manager, + unsigned int size, u32 suballoc_align, u32 domain) +{ + int r; + + r = amdgpu_bo_create_kernel(adev, size, AMDGPU_GPU_PAGE_SIZE, domain, + &sa_manager->bo, &sa_manager->gpu_addr, + &sa_manager->cpu_ptr); + if (r) { + dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r); + return r; + } + + memset(sa_manager->cpu_ptr, 0, size); + drm_suballoc_manager_init(&sa_manager->base, size, suballoc_align); + return r; +} + +void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev, + struct amdgpu_sa_manager *sa_manager) +{ + if (sa_manager->bo == NULL) { + dev_err(adev->dev, "no bo for sa manager\n"); + return; + } + + drm_suballoc_manager_fini(&sa_manager->base); + + amdgpu_bo_free_kernel(&sa_manager->bo, &sa_manager->gpu_addr, &sa_manager->cpu_ptr); +} + +int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager, + struct drm_suballoc **sa_bo, + unsigned int size) +{ + struct drm_suballoc *sa = drm_suballoc_new(&sa_manager->base, size, + GFP_KERNEL, false, 0); + + if (IS_ERR(sa)) { + *sa_bo = NULL; + + return PTR_ERR(sa); + } + + *sa_bo = sa; + return 0; +} + +void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct drm_suballoc **sa_bo, + struct dma_fence *fence) +{ + if (sa_bo == NULL || *sa_bo == NULL) { + return; + } + + drm_suballoc_free(*sa_bo, fence); + *sa_bo = NULL; +} + +#if defined(CONFIG_DEBUG_FS) + +void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager, + struct seq_file *m) +{ + struct drm_printer p = drm_seq_file_printer(m); + + drm_suballoc_dump_debug_info(&sa_manager->base, &p, sa_manager->gpu_addr); +} +#endif |