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5489e7d44a
Populate new per SR-IOV function debugfs directories with next level directories that represent tiles. There are no files yet, but we will continue updating that tree in upcoming patches. Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> Link: https://lore.kernel.org/r/20250928140029.198847-4-michal.wajdeczko@intel.com
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2025 Intel Corporation
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*/
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#include <linux/debugfs.h>
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#include <drm/drm_debugfs.h>
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#include "xe_device_types.h"
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#include "xe_tile_sriov_pf_debugfs.h"
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#include "xe_sriov.h"
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/*
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* /sys/kernel/debug/dri/BDF/
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* ├── sriov # d_inode->i_private = (xe_device*)
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* │ ├── pf # d_inode->i_private = (xe_device*)
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* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
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* │ │ ├── tile1
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* │ │ : :
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* │ ├── vf1 # d_inode->i_private = VFID(1)
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* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
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* │ │ ├── tile1
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* │ │ : :
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* │ ├── vfN # d_inode->i_private = VFID(N)
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* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
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* │ │ ├── tile1
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* : : : :
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*/
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static void *extract_priv(struct dentry *d)
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{
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return d->d_inode->i_private;
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}
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__maybe_unused
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static struct xe_tile *extract_tile(struct dentry *d)
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{
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return extract_priv(d);
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}
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static struct xe_device *extract_xe(struct dentry *d)
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{
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return extract_priv(d->d_parent->d_parent);
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}
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__maybe_unused
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static unsigned int extract_vfid(struct dentry *d)
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{
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void *pp = extract_priv(d->d_parent);
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return pp == extract_xe(d) ? PFID : (uintptr_t)pp;
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}
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/**
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* xe_tile_sriov_pf_debugfs_populate() - Populate SR-IOV debugfs tree with tile files.
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* @tile: the &xe_tile to register
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* @parent: the parent &dentry that represents the SR-IOV @vfid function
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* @vfid: the VF identifier
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*
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* Add to the @parent directory new debugfs directory that will represent a @tile and
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* populate it with files that are related to the SR-IOV @vfid function.
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*
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* This function can only be called on PF.
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*/
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void xe_tile_sriov_pf_debugfs_populate(struct xe_tile *tile, struct dentry *parent,
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unsigned int vfid)
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{
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struct xe_device *xe = tile->xe;
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struct dentry *dent;
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char name[10]; /* should be enough up to "tile%u\0" for 2^16 - 1 */
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xe_tile_assert(tile, IS_SRIOV_PF(xe));
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xe_tile_assert(tile, extract_priv(parent->d_parent) == xe);
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xe_tile_assert(tile, extract_priv(parent) == tile->xe ||
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(uintptr_t)extract_priv(parent) == vfid);
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/*
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* /sys/kernel/debug/dri/BDF/
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* ├── sriov
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* │ ├── pf # parent, d_inode->i_private = (xe_device*)
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* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
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* │ │ ├── tile1
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* │ │ : :
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* │ ├── vf1 # parent, d_inode->i_private = VFID(1)
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* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
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* │ │ ├── tile1
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* : : : :
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*/
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snprintf(name, sizeof(name), "tile%u", tile->id);
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dent = debugfs_create_dir(name, parent);
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if (IS_ERR(dent))
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return;
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dent->d_inode->i_private = tile;
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xe_tile_assert(tile, extract_tile(dent) == tile);
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xe_tile_assert(tile, extract_vfid(dent) == vfid);
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xe_tile_assert(tile, extract_xe(dent) == xe);
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}
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