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 000000000..10df73199
--- /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