1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #include "msm_ringbuffer.h" 8 #include "msm_gpu.h" 9 10 struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id, 11 void *memptrs, uint64_t memptrs_iova) 12 { 13 struct msm_ringbuffer *ring; 14 char name[32]; 15 int ret; 16 17 /* We assume everwhere that MSM_GPU_RINGBUFFER_SZ is a power of 2 */ 18 BUILD_BUG_ON(!is_power_of_2(MSM_GPU_RINGBUFFER_SZ)); 19 20 ring = kzalloc(sizeof(*ring), GFP_KERNEL); 21 if (!ring) { 22 ret = -ENOMEM; 23 goto fail; 24 } 25 26 ring->gpu = gpu; 27 ring->id = id; 28 29 ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ, 30 check_apriv(gpu, MSM_BO_WC | MSM_BO_GPU_READONLY), 31 gpu->aspace, &ring->bo, &ring->iova); 32 33 if (IS_ERR(ring->start)) { 34 ret = PTR_ERR(ring->start); 35 ring->start = 0; 36 goto fail; 37 } 38 39 msm_gem_object_set_name(ring->bo, "ring%d", id); 40 41 ring->end = ring->start + (MSM_GPU_RINGBUFFER_SZ >> 2); 42 ring->next = ring->start; 43 ring->cur = ring->start; 44 45 ring->memptrs = memptrs; 46 ring->memptrs_iova = memptrs_iova; 47 48 INIT_LIST_HEAD(&ring->submits); 49 spin_lock_init(&ring->submit_lock); 50 spin_lock_init(&ring->preempt_lock); 51 52 snprintf(name, sizeof(name), "gpu-ring-%d", ring->id); 53 54 ring->fctx = msm_fence_context_alloc(gpu->dev, name); 55 56 return ring; 57 58 fail: 59 msm_ringbuffer_destroy(ring); 60 return ERR_PTR(ret); 61 } 62 63 void msm_ringbuffer_destroy(struct msm_ringbuffer *ring) 64 { 65 if (IS_ERR_OR_NULL(ring)) 66 return; 67 68 msm_fence_context_free(ring->fctx); 69 70 msm_gem_kernel_put(ring->bo, ring->gpu->aspace, false); 71 72 kfree(ring); 73 } 74