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drm/vram: add vram-mm debugfs file
Wire up drm_mm_print() for vram helpers, using a new debugfs file, so one can see how vram is used: # cat /sys/kernel/debug/dri/0/vram-mm 0x0000000000000000-0x0000000000000300: 768: used 0x0000000000000300-0x0000000000000600: 768: used 0x0000000000000600-0x0000000000000900: 768: used 0x0000000000000900-0x0000000000000c00: 768: used 0x0000000000000c00-0x0000000000004000: 13312: free total: 16384, used 3072 free 13312 Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: http://patchwork.freedesktop.org/patch/msgid/20190904054740.20817-5-kraxel@redhat.com
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@ -1,7 +1,9 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <drm/drm_debugfs.h>
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#include <drm/drm_device.h>
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#include <drm/drm_file.h>
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#include <drm/drm_gem_ttm_helper.h>
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#include <drm/drm_vram_mm_helper.h>
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#include <drm/ttm/ttm_page_alloc.h>
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@ -160,6 +162,48 @@ static struct ttm_bo_driver bo_driver = {
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* struct drm_vram_mm
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*/
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#if defined(CONFIG_DEBUG_FS)
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static int drm_vram_mm_debugfs(struct seq_file *m, void *data)
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{
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struct drm_info_node *node = (struct drm_info_node *) m->private;
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struct drm_vram_mm *vmm = node->minor->dev->vram_mm;
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struct drm_mm *mm = vmm->bdev.man[TTM_PL_VRAM].priv;
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struct ttm_bo_global *glob = vmm->bdev.glob;
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struct drm_printer p = drm_seq_file_printer(m);
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spin_lock(&glob->lru_lock);
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drm_mm_print(mm, &p);
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spin_unlock(&glob->lru_lock);
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return 0;
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}
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static const struct drm_info_list drm_vram_mm_debugfs_list[] = {
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{ "vram-mm", drm_vram_mm_debugfs, 0, NULL },
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};
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#endif
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/**
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* drm_vram_mm_debugfs_init() - Register VRAM MM debugfs file.
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*
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* @minor: drm minor device.
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*
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* Returns:
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* 0 on success, or
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* a negative error code otherwise.
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*/
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int drm_vram_mm_debugfs_init(struct drm_minor *minor)
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{
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int ret = 0;
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#if defined(CONFIG_DEBUG_FS)
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ret = drm_debugfs_create_files(drm_vram_mm_debugfs_list,
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ARRAY_SIZE(drm_vram_mm_debugfs_list),
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minor->debugfs_root, minor);
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#endif
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return ret;
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}
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EXPORT_SYMBOL(drm_vram_mm_debugfs_init);
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/**
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* drm_vram_mm_init() - Initialize an instance of VRAM MM.
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* @vmm: the VRAM MM instance to initialize
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@ -140,6 +140,7 @@ int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
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* &struct drm_driver with default functions.
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*/
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#define DRM_GEM_VRAM_DRIVER \
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.debugfs_init = drm_vram_mm_debugfs_init, \
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.dumb_create = drm_gem_vram_driver_dumb_create, \
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.dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset, \
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.gem_prime_mmap = drm_gem_prime_mmap
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@ -64,6 +64,7 @@ static inline struct drm_vram_mm *drm_vram_mm_of_bdev(
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return container_of(bdev, struct drm_vram_mm, bdev);
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}
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int drm_vram_mm_debugfs_init(struct drm_minor *minor);
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int drm_vram_mm_init(struct drm_vram_mm *vmm, struct drm_device *dev,
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uint64_t vram_base, size_t vram_size,
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const struct drm_vram_mm_funcs *funcs);
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