83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "msm_ringbuffer.h"
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#include "msm_gpu.h"
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struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
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void *memptrs, uint64_t memptrs_iova)
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{
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struct msm_ringbuffer *ring;
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char name[32];
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int ret;
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/* We assume everwhere that MSM_GPU_RINGBUFFER_SZ is a power of 2 */
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BUILD_BUG_ON(!is_power_of_2(MSM_GPU_RINGBUFFER_SZ));
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ring = kzalloc(sizeof(*ring), GFP_KERNEL);
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if (!ring) {
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ret = -ENOMEM;
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goto fail;
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}
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ring->gpu = gpu;
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ring->id = id;
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/* Pass NULL for the iova pointer - we will map it later */
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ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ,
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MSM_BO_WC, gpu->aspace, &ring->bo, NULL);
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if (IS_ERR(ring->start)) {
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ret = PTR_ERR(ring->start);
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ring->start = 0;
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goto fail;
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}
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ring->end = ring->start + (MSM_GPU_RINGBUFFER_SZ >> 2);
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ring->next = ring->start;
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ring->cur = ring->start;
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ring->memptrs = memptrs;
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ring->memptrs_iova = memptrs_iova;
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INIT_LIST_HEAD(&ring->submits);
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spin_lock_init(&ring->lock);
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snprintf(name, sizeof(name), "gpu-ring-%d", ring->id);
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ring->fctx = msm_fence_context_alloc(gpu->dev, name);
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return ring;
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fail:
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msm_ringbuffer_destroy(ring);
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return ERR_PTR(ret);
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}
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void msm_ringbuffer_destroy(struct msm_ringbuffer *ring)
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{
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if (IS_ERR_OR_NULL(ring))
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return;
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msm_fence_context_free(ring->fctx);
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if (ring->bo) {
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msm_gem_put_iova(ring->bo, ring->gpu->aspace);
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msm_gem_put_vaddr(ring->bo);
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drm_gem_object_put_unlocked(ring->bo);
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}
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kfree(ring);
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}
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