/* * Copyright (C) 2013 Red Hat * Author: Rob Clark <robdclark@gmail.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see <http://www.gnu.org/licenses/>. */ #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, MSM_BO_WC, 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->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); }