From c28e2f2b417ed747bfbc5f900c87f3ec9cc6b25e Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Tue, 9 Nov 2021 10:11:03 -0800 Subject: drm/msm: Remove struct_mutex usage The remaining struct_mutex usage is just to serialize various gpu related things (submit/retire/recover/fault/etc), so replace struct_mutex with gpu->lock. Signed-off-by: Rob Clark Link: https://lore.kernel.org/r/20211109181117.591148-4-robdclark@gmail.com Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/adreno/a5xx_debugfs.c | 4 ++-- drivers/gpu/drm/msm/adreno/adreno_device.c | 4 ++-- drivers/gpu/drm/msm/msm_debugfs.c | 12 ++++++------ drivers/gpu/drm/msm/msm_gpu.c | 14 +++++++------- drivers/gpu/drm/msm/msm_gpu.h | 20 +++++++++++++++----- drivers/gpu/drm/msm/msm_perf.c | 9 ++++++--- drivers/gpu/drm/msm/msm_rd.c | 16 +++++++++------- drivers/gpu/drm/msm/msm_ringbuffer.c | 4 ++-- 8 files changed, 49 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c b/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c index dd593ec2bc56..6bd397a85834 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c @@ -107,7 +107,7 @@ reset_set(void *data, u64 val) * try to reset an active GPU. */ - mutex_lock(&dev->struct_mutex); + mutex_lock(&gpu->lock); release_firmware(adreno_gpu->fw[ADRENO_FW_PM4]); adreno_gpu->fw[ADRENO_FW_PM4] = NULL; @@ -133,7 +133,7 @@ reset_set(void *data, u64 val) gpu->funcs->recover(gpu); pm_runtime_put_sync(&gpu->pdev->dev); - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); return 0; } diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c index 2a6ce76656aa..9e01ccc800a6 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -408,9 +408,9 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev) return NULL; } - mutex_lock(&dev->struct_mutex); + mutex_lock(&gpu->lock); ret = msm_gpu_hw_init(gpu); - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); pm_runtime_put_autosuspend(&pdev->dev); if (ret) { DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n", ret); diff --git a/drivers/gpu/drm/msm/msm_debugfs.c b/drivers/gpu/drm/msm/msm_debugfs.c index 698e86f5b960..6a99e8b5d25d 100644 --- a/drivers/gpu/drm/msm/msm_debugfs.c +++ b/drivers/gpu/drm/msm/msm_debugfs.c @@ -29,14 +29,14 @@ static int msm_gpu_show(struct seq_file *m, void *arg) struct msm_gpu *gpu = priv->gpu; int ret; - ret = mutex_lock_interruptible(&show_priv->dev->struct_mutex); + ret = mutex_lock_interruptible(&gpu->lock); if (ret) return ret; drm_printf(&p, "%s Status:\n", gpu->name); gpu->funcs->show(gpu, show_priv->state, &p); - mutex_unlock(&show_priv->dev->struct_mutex); + mutex_unlock(&gpu->lock); return 0; } @@ -48,9 +48,9 @@ static int msm_gpu_release(struct inode *inode, struct file *file) struct msm_drm_private *priv = show_priv->dev->dev_private; struct msm_gpu *gpu = priv->gpu; - mutex_lock(&show_priv->dev->struct_mutex); + mutex_lock(&gpu->lock); gpu->funcs->gpu_state_put(show_priv->state); - mutex_unlock(&show_priv->dev->struct_mutex); + mutex_unlock(&gpu->lock); kfree(show_priv); @@ -72,7 +72,7 @@ static int msm_gpu_open(struct inode *inode, struct file *file) if (!show_priv) return -ENOMEM; - ret = mutex_lock_interruptible(&dev->struct_mutex); + ret = mutex_lock_interruptible(&gpu->lock); if (ret) goto free_priv; @@ -81,7 +81,7 @@ static int msm_gpu_open(struct inode *inode, struct file *file) show_priv->state = gpu->funcs->gpu_state_get(gpu); pm_runtime_put_sync(&gpu->pdev->dev); - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); if (IS_ERR(show_priv->state)) { ret = PTR_ERR(show_priv->state); diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index 3dfc58e6498f..13de1241d595 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -150,7 +150,7 @@ int msm_gpu_hw_init(struct msm_gpu *gpu) { int ret; - WARN_ON(!mutex_is_locked(&gpu->dev->struct_mutex)); + WARN_ON(!mutex_is_locked(&gpu->lock)); if (!gpu->needs_hw_init) return 0; @@ -361,7 +361,7 @@ static void recover_worker(struct kthread_work *work) char *comm = NULL, *cmd = NULL; int i; - mutex_lock(&dev->struct_mutex); + mutex_lock(&gpu->lock); DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name); @@ -442,7 +442,7 @@ static void recover_worker(struct kthread_work *work) } } - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); msm_gpu_retire(gpu); } @@ -450,12 +450,11 @@ static void recover_worker(struct kthread_work *work) static void fault_worker(struct kthread_work *work) { struct msm_gpu *gpu = container_of(work, struct msm_gpu, fault_work); - struct drm_device *dev = gpu->dev; struct msm_gem_submit *submit; struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu); char *comm = NULL, *cmd = NULL; - mutex_lock(&dev->struct_mutex); + mutex_lock(&gpu->lock); submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1); if (submit && submit->fault_dumped) @@ -490,7 +489,7 @@ resume_smmu: memset(&gpu->fault_info, 0, sizeof(gpu->fault_info)); gpu->aspace->mmu->funcs->resume_translation(gpu->aspace->mmu); - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); } static void hangcheck_timer_reset(struct msm_gpu *gpu) @@ -733,7 +732,7 @@ void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) struct msm_ringbuffer *ring = submit->ring; unsigned long flags; - WARN_ON(!mutex_is_locked(&dev->struct_mutex)); + WARN_ON(!mutex_is_locked(&gpu->lock)); pm_runtime_get_sync(&gpu->pdev->dev); @@ -848,6 +847,7 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, INIT_LIST_HEAD(&gpu->active_list); mutex_init(&gpu->active_lock); + mutex_init(&gpu->lock); kthread_init_work(&gpu->retire_work, retire_worker); kthread_init_work(&gpu->recover_work, recover_worker); kthread_init_work(&gpu->fault_work, fault_worker); diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index f33f2c6aab47..0078a925fb64 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -161,13 +161,23 @@ struct msm_gpu { */ struct list_head active_list; + /** + * lock: + * + * General lock for serializing all the gpu things. + * + * TODO move to per-ring locking where feasible (ie. submit/retire + * path, etc) + */ + struct mutex lock; + /** * active_submits: * * The number of submitted but not yet retired submits, used to * determine transitions between active and idle. * - * Protected by lock + * Protected by active_lock */ int active_submits; @@ -548,28 +558,28 @@ static inline struct msm_gpu_state *msm_gpu_crashstate_get(struct msm_gpu *gpu) { struct msm_gpu_state *state = NULL; - mutex_lock(&gpu->dev->struct_mutex); + mutex_lock(&gpu->lock); if (gpu->crashstate) { kref_get(&gpu->crashstate->ref); state = gpu->crashstate; } - mutex_unlock(&gpu->dev->struct_mutex); + mutex_unlock(&gpu->lock); return state; } static inline void msm_gpu_crashstate_put(struct msm_gpu *gpu) { - mutex_lock(&gpu->dev->struct_mutex); + mutex_lock(&gpu->lock); if (gpu->crashstate) { if (gpu->funcs->gpu_state_put(gpu->crashstate)) gpu->crashstate = NULL; } - mutex_unlock(&gpu->dev->struct_mutex); + mutex_unlock(&gpu->lock); } /* diff --git a/drivers/gpu/drm/msm/msm_perf.c b/drivers/gpu/drm/msm/msm_perf.c index 3a27153eef08..3d3da79fec2a 100644 --- a/drivers/gpu/drm/msm/msm_perf.c +++ b/drivers/gpu/drm/msm/msm_perf.c @@ -155,9 +155,12 @@ static int perf_open(struct inode *inode, struct file *file) struct msm_gpu *gpu = priv->gpu; int ret = 0; - mutex_lock(&dev->struct_mutex); + if (!gpu) + return -ENODEV; - if (perf->open || !gpu) { + mutex_lock(&gpu->lock); + + if (perf->open) { ret = -EBUSY; goto out; } @@ -171,7 +174,7 @@ static int perf_open(struct inode *inode, struct file *file) perf->next_jiffies = jiffies + SAMPLE_TIME; out: - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); return ret; } diff --git a/drivers/gpu/drm/msm/msm_rd.c b/drivers/gpu/drm/msm/msm_rd.c index b55398a34fa4..81432ec07012 100644 --- a/drivers/gpu/drm/msm/msm_rd.c +++ b/drivers/gpu/drm/msm/msm_rd.c @@ -86,7 +86,7 @@ struct msm_rd_state { struct msm_gem_submit *submit; /* fifo access is synchronized on the producer side by - * struct_mutex held by submit code (otherwise we could + * gpu->lock held by submit code (otherwise we could * end up w/ cmds logged in different order than they * were executed). And read_lock synchronizes the reads */ @@ -181,9 +181,12 @@ static int rd_open(struct inode *inode, struct file *file) uint32_t gpu_id; int ret = 0; - mutex_lock(&dev->struct_mutex); + if (!gpu) + return -ENODEV; - if (rd->open || !gpu) { + mutex_lock(&gpu->lock); + + if (rd->open) { ret = -EBUSY; goto out; } @@ -200,7 +203,7 @@ static int rd_open(struct inode *inode, struct file *file) rd_write_section(rd, RD_GPU_ID, &gpu_id, sizeof(gpu_id)); out: - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); return ret; } @@ -340,11 +343,10 @@ out_unlock: msm_gem_unlock(&obj->base); } -/* called under struct_mutex */ +/* called under gpu->lock */ void msm_rd_dump_submit(struct msm_rd_state *rd, struct msm_gem_submit *submit, const char *fmt, ...) { - struct drm_device *dev = submit->dev; struct task_struct *task; char msg[256]; int i, n; @@ -355,7 +357,7 @@ void msm_rd_dump_submit(struct msm_rd_state *rd, struct msm_gem_submit *submit, /* writing into fifo is serialized by caller, and * rd->read_lock is used to serialize the reads */ - WARN_ON(!mutex_is_locked(&dev->struct_mutex)); + WARN_ON(!mutex_is_locked(&submit->gpu->lock)); if (fmt) { va_list args; diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c index 652b1dedd7c1..3bbf574c3bdc 100644 --- a/drivers/gpu/drm/msm/msm_ringbuffer.c +++ b/drivers/gpu/drm/msm/msm_ringbuffer.c @@ -21,11 +21,11 @@ static struct dma_fence *msm_job_run(struct drm_sched_job *job) pm_runtime_get_sync(&gpu->pdev->dev); /* TODO move submit path over to using a per-ring lock.. */ - mutex_lock(&gpu->dev->struct_mutex); + mutex_lock(&gpu->lock); msm_gpu_submit(gpu, submit); - mutex_unlock(&gpu->dev->struct_mutex); + mutex_unlock(&gpu->lock); pm_runtime_put(&gpu->pdev->dev); -- cgit v1.2.3