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// SPDX-License-Identifier: MIT
/*
* Copyright © 2025 Intel Corporation
*/
#include <linux/debugfs.h>
#include <drm/drm_debugfs.h>
#include "xe_device.h"
#include "xe_device_types.h"
#include "xe_gt_sriov_pf_config.h"
#include "xe_gt_sriov_pf_debugfs.h"
#include "xe_pm.h"
#include "xe_tile_debugfs.h"
#include "xe_tile_sriov_pf_debugfs.h"
#include "xe_sriov.h"
#include "xe_sriov_pf.h"
#include "xe_sriov_pf_provision.h"
/*
* /sys/kernel/debug/dri/BDF/
* ├── sriov # d_inode->i_private = (xe_device*)
* │ ├── pf # d_inode->i_private = (xe_device*)
* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
* │ │ ├── tile1
* │ │ : :
* │ ├── vf1 # d_inode->i_private = VFID(1)
* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
* │ │ ├── tile1
* │ │ : :
* │ ├── vfN # d_inode->i_private = VFID(N)
* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
* │ │ ├── tile1
* : : : :
*/
static void *extract_priv(struct dentry *d)
{
return d->d_inode->i_private;
}
__maybe_unused
static struct xe_tile *extract_tile(struct dentry *d)
{
return extract_priv(d);
}
static struct xe_device *extract_xe(struct dentry *d)
{
return extract_priv(d->d_parent->d_parent);
}
__maybe_unused
static unsigned int extract_vfid(struct dentry *d)
{
void *pp = extract_priv(d->d_parent);
return pp == extract_xe(d) ? PFID : (uintptr_t)pp;
}
/*
* /sys/kernel/debug/dri/BDF/
* ├── sriov
* : ├── pf
* : ├── tile0
* : ├── ggtt_available
* ├── ggtt_provisioned
*/
static int pf_config_print_available_ggtt(struct xe_tile *tile, struct drm_printer *p)
{
return xe_gt_sriov_pf_config_print_available_ggtt(tile->primary_gt, p);
}
static int pf_config_print_ggtt(struct xe_tile *tile, struct drm_printer *p)
{
return xe_gt_sriov_pf_config_print_ggtt(tile->primary_gt, p);
}
static const struct drm_info_list pf_ggtt_info[] = {
{
"ggtt_available",
.show = xe_tile_debugfs_simple_show,
.data = pf_config_print_available_ggtt,
},
{
"ggtt_provisioned",
.show = xe_tile_debugfs_simple_show,
.data = pf_config_print_ggtt,
},
};
/*
* /sys/kernel/debug/dri/BDF/
* ├── sriov
* : ├── pf
* : ├── tile0
* : ├── vram_provisioned
*/
static int pf_config_print_vram(struct xe_tile *tile, struct drm_printer *p)
{
return xe_gt_sriov_pf_config_print_lmem(tile->primary_gt, p);
}
static const struct drm_info_list pf_vram_info[] = {
{
"vram_provisioned",
.show = xe_tile_debugfs_simple_show,
.data = pf_config_print_vram,
},
};
/*
* /sys/kernel/debug/dri/BDF/
* ├── sriov
* │ ├── pf
* │ │ ├── tile0
* │ │ │ ├── ggtt_spare
* │ │ │ ├── vram_spare
* │ │ ├── tile1
* │ │ : :
* │ ├── vf1
* │ : ├── tile0
* │ │ ├── ggtt_quota
* │ │ ├── vram_quota
* │ ├── tile1
* │ : :
*/
#define DEFINE_SRIOV_TILE_CONFIG_DEBUGFS_ATTRIBUTE(NAME, CONFIG, TYPE, FORMAT) \
\
static int NAME##_set(void *data, u64 val) \
{ \
struct xe_tile *tile = extract_tile(data); \
unsigned int vfid = extract_vfid(data); \
struct xe_gt *gt = tile->primary_gt; \
struct xe_device *xe = tile->xe; \
int err; \
\
if (val > (TYPE)~0ull) \
return -EOVERFLOW; \
\
xe_pm_runtime_get(xe); \
err = xe_sriov_pf_wait_ready(xe) ?: \
xe_gt_sriov_pf_config_set_##CONFIG(gt, vfid, val); \
if (!err) \
xe_sriov_pf_provision_set_custom_mode(xe); \
xe_pm_runtime_put(xe); \
\
return err; \
} \
\
static int NAME##_get(void *data, u64 *val) \
{ \
struct xe_tile *tile = extract_tile(data); \
unsigned int vfid = extract_vfid(data); \
struct xe_gt *gt = tile->primary_gt; \
\
*val = xe_gt_sriov_pf_config_get_##CONFIG(gt, vfid); \
return 0; \
} \
\
DEFINE_DEBUGFS_ATTRIBUTE(NAME##_fops, NAME##_get, NAME##_set, FORMAT)
DEFINE_SRIOV_TILE_CONFIG_DEBUGFS_ATTRIBUTE(ggtt, ggtt, u64, "%llu\n");
DEFINE_SRIOV_TILE_CONFIG_DEBUGFS_ATTRIBUTE(vram, lmem, u64, "%llu\n");
static void pf_add_config_attrs(struct xe_tile *tile, struct dentry *dent, unsigned int vfid)
{
struct xe_device *xe = tile->xe;
xe_tile_assert(tile, tile == extract_tile(dent));
xe_tile_assert(tile, vfid == extract_vfid(dent));
debugfs_create_file_unsafe(vfid ? "ggtt_quota" : "ggtt_spare",
0644, dent, dent, &ggtt_fops);
if (IS_DGFX(xe))
debugfs_create_file_unsafe(vfid ? "vram_quota" : "vram_spare",
xe_device_has_lmtt(xe) ? 0644 : 0444,
dent, dent, &vram_fops);
}
static void pf_populate_tile(struct xe_tile *tile, struct dentry *dent, unsigned int vfid)
{
struct xe_device *xe = tile->xe;
struct drm_minor *minor = xe->drm.primary;
struct xe_gt *gt;
unsigned int id;
pf_add_config_attrs(tile, dent, vfid);
if (!vfid) {
drm_debugfs_create_files(pf_ggtt_info,
ARRAY_SIZE(pf_ggtt_info),
dent, minor);
if (IS_DGFX(xe))
drm_debugfs_create_files(pf_vram_info,
ARRAY_SIZE(pf_vram_info),
dent, minor);
}
for_each_gt_on_tile(gt, tile, id)
xe_gt_sriov_pf_debugfs_populate(gt, dent, vfid);
}
/**
* xe_tile_sriov_pf_debugfs_populate() - Populate SR-IOV debugfs tree with tile files.
* @tile: the &xe_tile to register
* @parent: the parent &dentry that represents the SR-IOV @vfid function
* @vfid: the VF identifier
*
* Add to the @parent directory new debugfs directory that will represent a @tile and
* populate it with files that are related to the SR-IOV @vfid function.
*
* This function can only be called on PF.
*/
void xe_tile_sriov_pf_debugfs_populate(struct xe_tile *tile, struct dentry *parent,
unsigned int vfid)
{
struct xe_device *xe = tile->xe;
struct dentry *dent;
char name[10]; /* should be enough up to "tile%u\0" for 2^16 - 1 */
xe_tile_assert(tile, IS_SRIOV_PF(xe));
xe_tile_assert(tile, extract_priv(parent->d_parent) == xe);
xe_tile_assert(tile, extract_priv(parent) == tile->xe ||
(uintptr_t)extract_priv(parent) == vfid);
/*
* /sys/kernel/debug/dri/BDF/
* ├── sriov
* │ ├── pf # parent, d_inode->i_private = (xe_device*)
* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
* │ │ ├── tile1
* │ │ : :
* │ ├── vf1 # parent, d_inode->i_private = VFID(1)
* │ │ ├── tile0 # d_inode->i_private = (xe_tile*)
* │ │ ├── tile1
* : : : :
*/
snprintf(name, sizeof(name), "tile%u", tile->id);
dent = debugfs_create_dir(name, parent);
if (IS_ERR(dent))
return;
dent->d_inode->i_private = tile;
xe_tile_assert(tile, extract_tile(dent) == tile);
xe_tile_assert(tile, extract_vfid(dent) == vfid);
xe_tile_assert(tile, extract_xe(dent) == xe);
pf_populate_tile(tile, dent, vfid);
}
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