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/* Copyright (c) 2016 The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*/
#include "msm_gpu.h"
#include "msm_gem.h"
#include "msm_snapshot_api.h"
void msm_snapshot_destroy(struct msm_gpu *gpu, struct msm_snapshot *snapshot)
{
struct drm_device *dev = gpu->dev;
struct msm_drm_private *priv = dev->dev_private;
struct platform_device *pdev = priv->gpu_pdev;
if (!snapshot)
return;
dma_free_coherent(&pdev->dev, SZ_1M, snapshot->ptr,
snapshot->physaddr);
kfree(snapshot);
}
struct msm_snapshot *msm_snapshot_new(struct msm_gpu *gpu)
{
struct drm_device *dev = gpu->dev;
struct msm_drm_private *priv = dev->dev_private;
struct platform_device *pdev = priv->gpu_pdev;
struct msm_snapshot *snapshot;
snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
if (!snapshot)
return ERR_PTR(-ENOMEM);
snapshot->ptr = dma_alloc_coherent(&pdev->dev, SZ_1M,
&snapshot->physaddr, GFP_KERNEL);
if (!snapshot->ptr) {
kfree(snapshot);
return ERR_PTR(-ENOMEM);
}
seq_buf_init(&snapshot->buf, snapshot->ptr, SZ_1M);
return snapshot;
}
int msm_gpu_snapshot(struct msm_gpu *gpu, struct msm_snapshot *snapshot)
{
int ret;
struct msm_snapshot_header header;
uint64_t val;
if (!snapshot)
return -ENOMEM;
/*
* For now, blow away the snapshot and take a new one - the most
* interesting hang is the last one we saw
*/
seq_buf_init(&snapshot->buf, snapshot->ptr, SZ_1M);
header.magic = SNAPSHOT_MAGIC;
gpu->funcs->get_param(gpu, MSM_PARAM_GPU_ID, &val);
header.gpuid = lower_32_bits(val);
gpu->funcs->get_param(gpu, MSM_PARAM_CHIP_ID, &val);
header.chipid = lower_32_bits(val);
seq_buf_putmem(&snapshot->buf, &header, sizeof(header));
ret = gpu->funcs->snapshot(gpu, snapshot);
if (!ret) {
struct msm_snapshot_section_header end;
end.magic = SNAPSHOT_SECTION_MAGIC;
end.id = SNAPSHOT_SECTION_END;
end.size = sizeof(end);
seq_buf_putmem(&snapshot->buf, &end, sizeof(end));
dev_info(gpu->dev->dev, "GPU snapshot created [0x%pa (%d bytes)]\n",
&snapshot->physaddr, seq_buf_used(&snapshot->buf));
}
return ret;
}
int msm_snapshot_write(struct msm_gpu *gpu, struct seq_file *m)
{
if (gpu && gpu->snapshot)
seq_write(m, gpu->snapshot->ptr,
seq_buf_used(&gpu->snapshot->buf));
return 0;
}
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