[PATCH 1/3] drm/vmwgfx: Add debugfs entries for ttm placements
Zack Rusin
zackr at vmware.com
Tue Apr 5 14:00:58 UTC 2022
On Mon, 2022-04-04 at 17:38 +0200, Daniel Vetter wrote:
> On Fri, Apr 01, 2022 at 04:56:00PM -0400, Zack Rusin wrote:
> > From: Zack Rusin <zackr at vmware.com>
> >
> > Add a few debugfs entries for every used TTM placement that vmwgfx
> > is
> > using. This allows basic tracking of memory usage inside vmwgfx,
> > e.g.
> > 'cat /sys/kernel/debug/dri/0/mob_ttm' will display mob memory
> > usage.
> >
> > Signed-off-by: Zack Rusin <zackr at vmware.com>
> > Reviewed-by: Martin Krastev <krastevm at vmware.com>
> > ---
> > drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 1 +
> > drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 1 +
> > drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 97
> > +++++++++++++++++++++-
> > 3 files changed, 98 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> > b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> > index 791f9a5f3868..6d675855f065 100644
> > --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> > +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> > @@ -1632,6 +1632,7 @@ static int vmw_probe(struct pci_dev *pdev,
> > const struct pci_device_id *ent)
> > goto out_unload;
> >
> > vmw_debugfs_gem_init(vmw);
> > + vmw_ttm_debugfs_init(vmw);
> >
> > return 0;
> > out_unload:
> > diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> > b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> > index be19aa6e1f13..eabe3e8e9cf9 100644
> > --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> > +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> > @@ -1085,6 +1085,7 @@ vmw_bo_sg_table(struct ttm_buffer_object
> > *bo);
> > extern int vmw_bo_create_and_populate(struct vmw_private
> > *dev_priv,
> > unsigned long bo_size,
> > struct ttm_buffer_object
> > **bo_p);
> > +void vmw_ttm_debugfs_init(struct vmw_private *vdev);
> >
> > extern void vmw_piter_start(struct vmw_piter *viter,
> > const struct vmw_sg_table *vsgt,
> > diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
> > b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
> > index b84ecc6d6611..355414595e52 100644
> > --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
> > +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
> > @@ -1,7 +1,7 @@
> > // SPDX-License-Identifier: GPL-2.0 OR MIT
> > /*****************************************************************
> > *********
> > *
> > - * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
> > + * Copyright 2009-2022 VMware, Inc., Palo Alto, CA., USA
> > *
> > * Permission is hereby granted, free of charge, to any person
> > obtaining a
> > * copy of this software and associated documentation files (the
> > @@ -677,3 +677,98 @@ int vmw_bo_create_and_populate(struct
> > vmw_private *dev_priv,
> > *bo_p = bo;
> > return ret;
> > }
> > +
> > +#if defined(CONFIG_DEBUG_FS)
> > +
> > +static int vmw_ttm_vram_table_show(struct seq_file *m, void
> > *unused)
> > +{
> > + struct vmw_private *vdev = (struct vmw_private *)m->private;
> > + struct ttm_resource_manager *man = ttm_manager_type(&vdev-
> > >bdev,
> > +
> > TTM_PL_VRAM);
> > + struct drm_printer p = drm_seq_file_printer(m);
> > +
> > + ttm_resource_manager_debug(man, &p);
> > + return 0;
> > +}
> > +
> > +static int vmw_ttm_page_pool_show(struct seq_file *m, void
> > *unused)
> > +{
> > + struct vmw_private *vdev = (struct vmw_private *)m->private;
> > +
> > + return ttm_pool_debugfs(&vdev->bdev.pool, m);
> > +}
> > +
> > +static int vmw_ttm_mob_table_show(struct seq_file *m, void
> > *unused)
> > +{
> > + struct vmw_private *vdev = (struct vmw_private *)m->private;
> > + struct ttm_resource_manager *man = ttm_manager_type(&vdev-
> > >bdev,
> > +
> > VMW_PL_MOB);
> > + struct drm_printer p = drm_seq_file_printer(m);
> > +
> > + ttm_resource_manager_debug(man, &p);
> > + return 0;
> > +}
> > +
> > +static int vmw_ttm_gmr_table_show(struct seq_file *m, void
> > *unused)
> > +{
> > + struct vmw_private *vdev = (struct vmw_private *)m->private;
> > + struct ttm_resource_manager *man = ttm_manager_type(&vdev-
> > >bdev,
> > +
> > VMW_PL_GMR);
> > + struct drm_printer p = drm_seq_file_printer(m);
> > +
> > + ttm_resource_manager_debug(man, &p);
> > + return 0;
> > +}
> > +
> > +static int vmw_ttm_system_table_show(struct seq_file *m, void
> > *unused)
> > +{
> > + struct vmw_private *vdev = (struct vmw_private *)m->private;
> > + struct ttm_resource_manager *man = ttm_manager_type(&vdev-
> > >bdev,
> > +
> > TTM_PL_SYSTEM);
> > + struct drm_printer p = drm_seq_file_printer(m);
> > +
> > + ttm_resource_manager_debug(man, &p);
> > + return 0;
> > +}
> > +
> > +static int vmw_ttm_system_mob_table_show(struct seq_file *m, void
> > *unused)
> > +{
> > + struct vmw_private *vdev = (struct vmw_private *)m->private;
> > + struct ttm_resource_manager *man = ttm_manager_type(&vdev-
> > >bdev,
> > +
> > VMW_PL_SYSTEM);
> > + struct drm_printer p = drm_seq_file_printer(m);
> > +
> > + ttm_resource_manager_debug(man, &p);
> > + return 0;
> > +}
> > +
> > +DEFINE_SHOW_ATTRIBUTE(vmw_ttm_vram_table);
> > +DEFINE_SHOW_ATTRIBUTE(vmw_ttm_mob_table);
> > +DEFINE_SHOW_ATTRIBUTE(vmw_ttm_gmr_table);
> > +DEFINE_SHOW_ATTRIBUTE(vmw_ttm_system_table);
> > +DEFINE_SHOW_ATTRIBUTE(vmw_ttm_system_mob_table);
> > +DEFINE_SHOW_ATTRIBUTE(vmw_ttm_page_pool);
> > +
> > +#endif
> > +
> > +void vmw_ttm_debugfs_init(struct vmw_private *vdev)
> > +{
> > +#if defined(CONFIG_DEBUG_FS)
> > + struct drm_device *drm = &vdev->drm;
> > + struct drm_minor *minor = drm->primary;
> > + struct dentry *root = minor->debugfs_root;
> > +
> > + debugfs_create_file("vram_ttm", 0444, root, vdev,
> > + &vmw_ttm_vram_table_fops);
> > + debugfs_create_file("mob_ttm", 0444, root, vdev,
> > + &vmw_ttm_mob_table_fops);
> > + debugfs_create_file("gmr_ttm", 0444, root, vdev,
> > + &vmw_ttm_gmr_table_fops);
> > + debugfs_create_file("system_ttm", 0444, root, vdev,
> > + &vmw_ttm_system_table_fops);
> > + debugfs_create_file("system_mob_ttm", 0444, root, vdev,
> > + &vmw_ttm_system_mob_table_fops);
> > + debugfs_create_file("ttm_page_pool", 0444, root, vdev,
> > + &vmw_ttm_page_pool_fops);
> > +#endif
>
> Bit orthogonal, but can't ttm create the debugfs files for all the
> regions
> on its own when we set everything up? Or at least a "create me all
> the
> regions debugfs files" helpers would be useful. It's just rather
> silly
> amounts of boilerplate we're having here, and that in each driver.
Yea, agreed. With some kind of mapping between ttm data placement
defines and file names, this would be very much doable. Would you like
to see that done instead of this patch or after this patch lands?
z
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