// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2013 Red Hat * Author: Rob Clark <robdclark@gmail.com> */ #include "msm_ringbuffer.h"#include "msm_gpu.h" struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,		void *memptrs, uint64_t memptrs_iova){	struct msm_ringbuffer *ring;	char name[32];	int ret; 	/* We assume everwhere that MSM_GPU_RINGBUFFER_SZ is a power of 2 */	BUILD_BUG_ON(!is_power_of_2(MSM_GPU_RINGBUFFER_SZ)); 	ring = kzalloc(sizeof(*ring), GFP_KERNEL);	if (!ring) {		ret = -ENOMEM;		goto fail;	} 	ring->gpu = gpu;	ring->id = id; 	ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ,		check_apriv(gpu, MSM_BO_WC | MSM_BO_GPU_READONLY),		gpu->aspace, &ring->bo, &ring->iova); 	if (IS_ERR(ring->start)) {		ret = PTR_ERR(ring->start);		ring->start = 0;		goto fail;	} 	msm_gem_object_set_name(ring->bo, "ring%d", id); 	ring->end   = ring->start + (MSM_GPU_RINGBUFFER_SZ >> 2);	ring->next  = ring->start;	ring->cur   = ring->start; 	ring->memptrs = memptrs;	ring->memptrs_iova = memptrs_iova; 	INIT_LIST_HEAD(&ring->submits);	spin_lock_init(&ring->submit_lock);	spin_lock_init(&ring->preempt_lock); 	snprintf(name, sizeof(name), "gpu-ring-%d", ring->id); 	ring->fctx = msm_fence_context_alloc(gpu->dev, name); 	return ring; fail:	msm_ringbuffer_destroy(ring);	return ERR_PTR(ret);} void msm_ringbuffer_destroy(struct msm_ringbuffer *ring){	if (IS_ERR_OR_NULL(ring))		return; 	msm_fence_context_free(ring->fctx); 	msm_gem_kernel_put(ring->bo, ring->gpu->aspace, false); 	kfree(ring);}