139 lines
3.0 KiB
C
139 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
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*/
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#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__
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#include "msm_disp_snapshot.h"
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static ssize_t __maybe_unused disp_devcoredump_read(char *buffer, loff_t offset,
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size_t count, void *data, size_t datalen)
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{
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struct drm_print_iterator iter;
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struct drm_printer p;
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struct msm_disp_state *disp_state;
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disp_state = data;
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iter.data = buffer;
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iter.offset = 0;
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iter.start = offset;
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iter.remain = count;
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p = drm_coredump_printer(&iter);
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msm_disp_state_print(disp_state, &p);
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return count - iter.remain;
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}
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struct msm_disp_state *
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msm_disp_snapshot_state_sync(struct msm_kms *kms)
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{
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struct drm_device *drm_dev = kms->dev;
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struct msm_disp_state *disp_state;
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WARN_ON(!mutex_is_locked(&kms->dump_mutex));
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disp_state = kzalloc(sizeof(struct msm_disp_state), GFP_KERNEL);
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if (!disp_state)
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return ERR_PTR(-ENOMEM);
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disp_state->dev = drm_dev->dev;
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disp_state->drm_dev = drm_dev;
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INIT_LIST_HEAD(&disp_state->blocks);
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msm_disp_snapshot_capture_state(disp_state);
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return disp_state;
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}
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static void _msm_disp_snapshot_work(struct kthread_work *work)
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{
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struct msm_kms *kms = container_of(work, struct msm_kms, dump_work);
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struct msm_disp_state *disp_state;
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struct drm_printer p;
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/* Serialize dumping here */
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mutex_lock(&kms->dump_mutex);
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disp_state = msm_disp_snapshot_state_sync(kms);
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mutex_unlock(&kms->dump_mutex);
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if (IS_ERR(disp_state))
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return;
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if (MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE) {
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p = drm_info_printer(disp_state->drm_dev->dev);
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msm_disp_state_print(disp_state, &p);
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}
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/*
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* If COREDUMP is disabled, the stub will call the free function.
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* If there is a codedump pending for the device, the dev_coredumpm()
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* will also free new coredump state.
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*/
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dev_coredumpm(disp_state->dev, THIS_MODULE, disp_state, 0, GFP_KERNEL,
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disp_devcoredump_read, msm_disp_state_free);
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}
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void msm_disp_snapshot_state(struct drm_device *drm_dev)
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{
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struct msm_drm_private *priv;
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struct msm_kms *kms;
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if (!drm_dev) {
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DRM_ERROR("invalid params\n");
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return;
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}
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priv = drm_dev->dev_private;
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kms = priv->kms;
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kthread_queue_work(kms->dump_worker, &kms->dump_work);
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}
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int msm_disp_snapshot_init(struct drm_device *drm_dev)
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{
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struct msm_drm_private *priv;
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struct msm_kms *kms;
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if (!drm_dev) {
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DRM_ERROR("invalid params\n");
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return -EINVAL;
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}
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priv = drm_dev->dev_private;
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kms = priv->kms;
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mutex_init(&kms->dump_mutex);
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kms->dump_worker = kthread_create_worker(0, "%s", "disp_snapshot");
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if (IS_ERR(kms->dump_worker))
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DRM_ERROR("failed to create disp state task\n");
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kthread_init_work(&kms->dump_work, _msm_disp_snapshot_work);
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return 0;
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}
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void msm_disp_snapshot_destroy(struct drm_device *drm_dev)
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{
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struct msm_kms *kms;
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struct msm_drm_private *priv;
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if (!drm_dev) {
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DRM_ERROR("invalid params\n");
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return;
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}
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priv = drm_dev->dev_private;
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kms = priv->kms;
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if (kms->dump_worker)
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kthread_destroy_worker(kms->dump_worker);
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mutex_destroy(&kms->dump_mutex);
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}
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