From 7ea235653328644b5ba8707e65484446a118e193 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20K=C3=B6nig?= Date: Mon, 15 Feb 2016 15:23:00 +0100 Subject: [PATCH] drm/amdgpu: rework GEM info printing MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Print BOs grouped per client. Signed-off-by: Christian König Reviewed-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 94 ++++++++++++++++--------- 2 files changed, 61 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index fc995b45fa8f..4be61f0ed19d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -531,7 +531,6 @@ struct amdgpu_bo { struct amdgpu_bo *parent; struct ttm_bo_kmap_obj dma_buf_vmap; - pid_t pid; struct amdgpu_mn *mn; struct list_head mn_list; }; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index fae8bf7fcf1a..0a80febbc1b2 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -83,7 +83,6 @@ retry: return r; } *obj = &robj->gem_base; - robj->pid = task_pid_nr(current); mutex_lock(&adev->gem.mutex); list_add_tail(&robj->list, &adev->gem.objects); @@ -694,44 +693,73 @@ int amdgpu_mode_dumb_create(struct drm_file *file_priv, } #if defined(CONFIG_DEBUG_FS) +static int amdgpu_debugfs_gem_bo_info(int id, void *ptr, void *data) +{ + struct drm_gem_object *gobj = ptr; + struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj); + struct seq_file *m = data; + + unsigned domain; + const char *placement; + unsigned pin_count; + + domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type); + switch (domain) { + case AMDGPU_GEM_DOMAIN_VRAM: + placement = "VRAM"; + break; + case AMDGPU_GEM_DOMAIN_GTT: + placement = " GTT"; + break; + case AMDGPU_GEM_DOMAIN_CPU: + default: + placement = " CPU"; + break; + } + seq_printf(m, "\t0x%08x: %12ld byte %s @ 0x%010Lx", + id, amdgpu_bo_size(bo), placement, + amdgpu_bo_gpu_offset(bo)); + + pin_count = ACCESS_ONCE(bo->pin_count); + if (pin_count) + seq_printf(m, " pin count %d", pin_count); + seq_printf(m, "\n"); + + return 0; +} + static int amdgpu_debugfs_gem_info(struct seq_file *m, void *data) { struct drm_info_node *node = (struct drm_info_node *)m->private; struct drm_device *dev = node->minor->dev; - struct amdgpu_device *adev = dev->dev_private; - struct amdgpu_bo *rbo; - unsigned i = 0; + struct drm_file *file; + int r; - mutex_lock(&adev->gem.mutex); - list_for_each_entry(rbo, &adev->gem.objects, list) { - unsigned pin_count; - unsigned domain; - const char *placement; - - domain = amdgpu_mem_type_to_domain(rbo->tbo.mem.mem_type); - switch (domain) { - case AMDGPU_GEM_DOMAIN_VRAM: - placement = "VRAM"; - break; - case AMDGPU_GEM_DOMAIN_GTT: - placement = " GTT"; - break; - case AMDGPU_GEM_DOMAIN_CPU: - default: - placement = " CPU"; - break; - } - seq_printf(m, "bo[0x%08x] %12ld %s @ 0x%010Lx pid %8d", - i, amdgpu_bo_size(rbo), placement, - amdgpu_bo_gpu_offset(rbo), rbo->pid); - - pin_count = ACCESS_ONCE(rbo->pin_count); - if (pin_count) - seq_printf(m, " pin count %d", pin_count); - seq_printf(m, "\n"); - i++; + r = mutex_lock_interruptible(&dev->struct_mutex); + if (r) + return r; + + list_for_each_entry(file, &dev->filelist, lhead) { + struct task_struct *task; + + /* + * Although we have a valid reference on file->pid, that does + * not guarantee that the task_struct who called get_pid() is + * still alive (e.g. get_pid(current) => fork() => exit()). + * Therefore, we need to protect this ->comm access using RCU. + */ + rcu_read_lock(); + task = pid_task(file->pid, PIDTYPE_PID); + seq_printf(m, "pid %8d command %s:\n", pid_nr(file->pid), + task ? task->comm : ""); + rcu_read_unlock(); + + spin_lock(&file->table_lock); + idr_for_each(&file->object_idr, amdgpu_debugfs_gem_bo_info, m); + spin_unlock(&file->table_lock); } - mutex_unlock(&adev->gem.mutex); + + mutex_unlock(&dev->struct_mutex); return 0; } -- 2.20.1