[PATCH 1/3] drm/vmwgfx: Add debugfs entries for ttm placements
Daniel Vetter
daniel at ffwll.ch
Tue Apr 5 20:05:58 UTC 2022
On Tue, 5 Apr 2022 at 16:01, Zack Rusin <zackr at vmware.com> wrote:
>
> 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?
If you're volunteering either way is fine imo :-)
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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