// SPDX-License-Identifier: MIT
/*
* Copyright © 2023-2024 Intel Corporation
*/
#include <linux/debugfs.h>
#include <drm/drm_print.h>
#include <drm/drm_debugfs.h>
#include "xe_bo.h"
#include "xe_debugfs.h"
#include "xe_device.h"
#include "xe_gt.h"
#include "xe_gt_debugfs.h"
#include "xe_gt_sriov_pf_config.h"
#include "xe_gt_sriov_pf_control.h"
#include "xe_gt_sriov_pf_debugfs.h"
#include "xe_gt_sriov_pf_helpers.h"
#include "xe_gt_sriov_pf_migration.h"
#include "xe_gt_sriov_pf_monitor.h"
#include "xe_gt_sriov_pf_policy.h"
#include "xe_gt_sriov_pf_service.h"
#include "xe_pm.h"
#include "xe_sriov_pf.h"
/*
* /sys/kernel/debug/dri/0/
* ├── gt0 # d_inode->i_private = gt
* │ ├── pf # d_inode->i_private = gt
* │ ├── vf1 # d_inode->i_private = VFID(1)
* : :
* │ ├── vfN # d_inode->i_private = VFID(N)
*/
static void *extract_priv(struct dentry *d)
{
return d->d_inode->i_private;
}
static struct xe_gt *extract_gt(struct dentry *d)
{
return extract_priv(d->d_parent);
}
static unsigned int extract_vfid(struct dentry *d)
{
return extract_priv(d) == extract_gt(d) ? PFID : (uintptr_t)extract_priv(d);
}
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── pf
* │ │ ├── contexts_provisioned
* │ │ ├── doorbells_provisioned
* │ │ ├── runtime_registers
* │ │ ├── negotiated_versions
* │ │ ├── adverse_events
* ├── gt1
* │ ├── pf
* │ │ ├── ...
*/
static const struct drm_info_list pf_info[] = {
{
"contexts_provisioned" ,
.show = xe_gt_debugfs_simple_show,
.data = xe_gt_sriov_pf_config_print_ctxs,
},
{
"doorbells_provisioned" ,
.show = xe_gt_debugfs_simple_show,
.data = xe_gt_sriov_pf_config_print_dbs,
},
{
"runtime_registers" ,
.show = xe_gt_debugfs_simple_show,
.data = xe_gt_sriov_pf_service_print_runtime,
},
{
"adverse_events" ,
.show = xe_gt_debugfs_simple_show,
.data = xe_gt_sriov_pf_monitor_print_events,
},
};
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── pf
* │ │ ├── ggtt_available
* │ │ ├── ggtt_provisioned
*/
static const struct drm_info_list pf_ggtt_info[] = {
{
"ggtt_available" ,
.show = xe_gt_debugfs_simple_show,
.data = xe_gt_sriov_pf_config_print_available_ggtt,
},
{
"ggtt_provisioned" ,
.show = xe_gt_debugfs_simple_show,
.data = xe_gt_sriov_pf_config_print_ggtt,
},
};
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── pf
* │ │ ├── lmem_provisioned
*/
static const struct drm_info_list pf_lmem_info[] = {
{
"lmem_provisioned" ,
.show = xe_gt_debugfs_simple_show,
.data = xe_gt_sriov_pf_config_print_lmem,
},
};
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── pf
* │ │ ├── reset_engine
* │ │ ├── sample_period
* │ │ ├── sched_if_idle
*/
#define DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(POLICY, TYPE, FORMAT) \
\
static int POLICY## _set(void *data, u64 val) \
{ \
struct xe_gt *gt = extract_gt(data); \
struct xe_device *xe = gt_to_xe(gt); \
int err; \
\
if (val > (TYPE)~0ull) \
return -EOVERFLOW; \
\
xe_pm_runtime_get(xe); \
err = xe_gt_sriov_pf_policy_set_## POLICY(gt, val); \
xe_pm_runtime_put(xe); \
\
return err; \
} \
\
static int POLICY## _get(void *data, u64 *val) \
{ \
struct xe_gt *gt = extract_gt(data); \
\
*val = xe_gt_sriov_pf_policy_get_## POLICY(gt); \
return 0; \
} \
\
DEFINE_DEBUGFS_ATTRIBUTE(POLICY## _fops, POLICY## _get, POLICY## _set, FORMAT)
DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(reset_engine, bool , "%llu\n" );
DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(sched_if_idle, bool , "%llu\n" );
DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(sample_period, u32, "%llu\n" );
static void pf_add_policy_attrs(struct xe_gt *gt, struct dentry *parent)
{
xe_gt_assert(gt, gt == extract_gt(parent));
xe_gt_assert(gt, PFID == extract_vfid(parent));
debugfs_create_file_unsafe("reset_engine" , 0644, parent, parent, &reset_engine_fops);
debugfs_create_file_unsafe("sched_if_idle" , 0644, parent, parent, &sched_if_idle_fops);
debugfs_create_file_unsafe("sample_period_ms" , 0644, parent, parent, &sample_period_fops);
}
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── pf
* │ │ ├── ggtt_spare
* │ │ ├── lmem_spare
* │ │ ├── doorbells_spare
* │ │ ├── contexts_spare
* │ │ ├── exec_quantum_ms
* │ │ ├── preempt_timeout_us
* │ │ ├── sched_priority
* │ ├── vf1
* │ │ ├── ggtt_quota
* │ │ ├── lmem_quota
* │ │ ├── doorbells_quota
* │ │ ├── contexts_quota
* │ │ ├── exec_quantum_ms
* │ │ ├── preempt_timeout_us
* │ │ ├── sched_priority
*/
#define DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(CONFIG, TYPE, FORMAT) \
\
static int CONFIG## _set(void *data, u64 val) \
{ \
struct xe_gt *gt = extract_gt(data); \
unsigned int vfid = extract_vfid(data); \
struct xe_device *xe = gt_to_xe(gt); \
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); \
xe_pm_runtime_put(xe); \
\
return err; \
} \
\
static int CONFIG## _get(void *data, u64 *val) \
{ \
struct xe_gt *gt = extract_gt(data); \
unsigned int vfid = extract_vfid(data); \
\
*val = xe_gt_sriov_pf_config_get_## CONFIG(gt, vfid); \
return 0; \
} \
\
DEFINE_DEBUGFS_ATTRIBUTE(CONFIG## _fops, CONFIG## _get, CONFIG## _set, FORMAT)
DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(ggtt, u64, "%llu\n" );
DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(lmem, u64, "%llu\n" );
DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(ctxs, u32, "%llu\n" );
DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(dbs, u32, "%llu\n" );
DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(exec_quantum, u32, "%llu\n" );
DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(preempt_timeout, u32, "%llu\n" );
DEFINE_SRIOV_GT_CONFIG_DEBUGFS_ATTRIBUTE(sched_priority, u32, "%llu\n" );
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── pf
* │ │ ├── threshold_cat_error_count
* │ │ ├── threshold_doorbell_time_us
* │ │ ├── threshold_engine_reset_count
* │ │ ├── threshold_guc_time_us
* │ │ ├── threshold_irq_time_us
* │ │ ├── threshold_page_fault_count
* │ ├── vf1
* │ │ ├── threshold_cat_error_count
* │ │ ├── threshold_doorbell_time_us
* │ │ ├── threshold_engine_reset_count
* │ │ ├── threshold_guc_time_us
* │ │ ├── threshold_irq_time_us
* │ │ ├── threshold_page_fault_count
*/
static int set_threshold(void *data, u64 val, enum xe_guc_klv_threshold_index index)
{
struct xe_gt *gt = extract_gt(data);
unsigned int vfid = extract_vfid(data);
struct xe_device *xe = gt_to_xe(gt);
int err;
if (val > (u32)~0ull)
return -EOVERFLOW;
xe_pm_runtime_get(xe);
err = xe_gt_sriov_pf_config_set_threshold(gt, vfid, index, val);
xe_pm_runtime_put(xe);
return err;
}
static int get_threshold(void *data, u64 *val, enum xe_guc_klv_threshold_index index)
{
struct xe_gt *gt = extract_gt(data);
unsigned int vfid = extract_vfid(data);
*val = xe_gt_sriov_pf_config_get_threshold(gt, vfid, index);
return 0;
}
#define DEFINE_SRIOV_GT_THRESHOLD_DEBUGFS_ATTRIBUTE(THRESHOLD, INDEX) \
\
static int THRESHOLD## _set(void *data, u64 val) \
{ \
return set_threshold(data, val, INDEX); \
} \
\
static int THRESHOLD## _get(void *data, u64 *val) \
{ \
return get_threshold(data, val, INDEX); \
} \
\
DEFINE_DEBUGFS_ATTRIBUTE(THRESHOLD## _fops, THRESHOLD## _get, THRESHOLD## _set, "%llu\n" )
/* generate all threshold attributes */
#define define_threshold_attribute(TAG, NAME, ...) \
DEFINE_SRIOV_GT_THRESHOLD_DEBUGFS_ATTRIBUTE(NAME, MAKE_XE_GUC_KLV_THRESHOLD_INDEX(TAG));
MAKE_XE_GUC_KLV_THRESHOLDS_SET(define_threshold_attribute)
#undef define_threshold_attribute
static void pf_add_config_attrs(struct xe_gt *gt, struct dentry *parent, unsigned int vfid)
{
xe_gt_assert(gt, gt == extract_gt(parent));
xe_gt_assert(gt, vfid == extract_vfid(parent));
if (xe_gt_is_main_type(gt)) {
debugfs_create_file_unsafe(vfid ? "ggtt_quota" : "ggtt_spare" ,
0644, parent, parent, &ggtt_fops);
if (xe_device_has_lmtt(gt_to_xe(gt)))
debugfs_create_file_unsafe(vfid ? "lmem_quota" : "lmem_spare" ,
0644, parent, parent, &lmem_fops);
}
debugfs_create_file_unsafe(vfid ? "doorbells_quota" : "doorbells_spare" ,
0644, parent, parent, &dbs_fops);
debugfs_create_file_unsafe(vfid ? "contexts_quota" : "contexts_spare" ,
0644, parent, parent, &ctxs_fops);
debugfs_create_file_unsafe("exec_quantum_ms" , 0644, parent, parent,
&exec_quantum_fops);
debugfs_create_file_unsafe("preempt_timeout_us" , 0644, parent, parent,
&preempt_timeout_fops);
debugfs_create_file_unsafe("sched_priority" , 0644, parent, parent,
&sched_priority_fops);
/* register all threshold attributes */
#define register_threshold_attribute(TAG, NAME, ...) \
debugfs_create_file_unsafe("threshold_" #NAME , 0644, parent, parent, \
&NAME## _fops);
MAKE_XE_GUC_KLV_THRESHOLDS_SET(register_threshold_attribute)
#undef register_threshold_attribute
}
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── vf1
* │ │ ├── control { stop, pause, resume }
*/
static const struct {
const char *cmd;
int (*fn)(struct xe_gt *gt, unsigned int vfid);
} control_cmds[] = {
{ "stop" , xe_gt_sriov_pf_control_stop_vf },
{ "pause" , xe_gt_sriov_pf_control_pause_vf },
{ "resume" , xe_gt_sriov_pf_control_resume_vf },
#ifdef CONFIG_DRM_XE_DEBUG_SRIOV
{ "restore!" , xe_gt_sriov_pf_migration_restore_guc_state },
#endif
};
static ssize_t control_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
struct dentry *dent = file_dentry(file);
struct dentry *parent = dent->d_parent;
struct xe_gt *gt = extract_gt(parent);
struct xe_device *xe = gt_to_xe(gt);
unsigned int vfid = extract_vfid(parent);
int ret = -EINVAL;
char cmd[32];
size_t n;
xe_gt_assert(gt, vfid);
xe_gt_sriov_pf_assert_vfid(gt, vfid);
if (*pos)
return -ESPIPE;
if (count > sizeof (cmd) - 1)
return -EINVAL;
ret = simple_write_to_buffer(cmd, sizeof (cmd) - 1, pos, buf, count);
if (ret < 0)
return ret;
cmd[ret] = '\0' ;
for (n = 0; n < ARRAY_SIZE(control_cmds); n++) {
xe_gt_assert(gt, sizeof (cmd) > strlen(control_cmds[n].cmd));
if (sysfs_streq(cmd, control_cmds[n].cmd)) {
xe_pm_runtime_get(xe);
ret = control_cmds[n].fn ? (*control_cmds[n].fn)(gt, vfid) : 0;
xe_pm_runtime_put(xe);
break ;
}
}
return (ret < 0) ? ret : count;
}
static ssize_t control_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
char help[128];
size_t n;
help[0] = '\0' ;
for (n = 0; n < ARRAY_SIZE(control_cmds); n++) {
strlcat(help, control_cmds[n].cmd, sizeof (help));
strlcat(help, "\n" , sizeof (help));
}
return simple_read_from_buffer(buf, count, ppos, help, strlen(help));
}
static const struct file_operations control_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.write = control_write,
.read = control_read,
.llseek = default_llseek,
};
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── vf1
* │ │ ├── guc_state
*/
static ssize_t guc_state_read(struct file *file, char __user *buf,
size_t count, loff_t *pos)
{
struct dentry *dent = file_dentry(file);
struct dentry *parent = dent->d_parent;
struct xe_gt *gt = extract_gt(parent);
unsigned int vfid = extract_vfid(parent);
return xe_gt_sriov_pf_migration_read_guc_state(gt, vfid, buf, count, pos);
}
static ssize_t guc_state_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct dentry *dent = file_dentry(file);
struct dentry *parent = dent->d_parent;
struct xe_gt *gt = extract_gt(parent);
unsigned int vfid = extract_vfid(parent);
if (*pos)
return -EINVAL;
return xe_gt_sriov_pf_migration_write_guc_state(gt, vfid, buf, count);
}
static const struct file_operations guc_state_ops = {
.owner = THIS_MODULE,
.read = guc_state_read,
.write = guc_state_write,
.llseek = default_llseek,
};
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── vf1
* │ │ ├── config_blob
*/
static ssize_t config_blob_read(struct file *file, char __user *buf,
size_t count, loff_t *pos)
{
struct dentry *dent = file_dentry(file);
struct dentry *parent = dent->d_parent;
struct xe_gt *gt = extract_gt(parent);
unsigned int vfid = extract_vfid(parent);
ssize_t ret;
void *tmp;
ret = xe_gt_sriov_pf_config_save(gt, vfid, NULL, 0);
if (!ret)
return -ENODATA;
if (ret < 0)
return ret;
tmp = kzalloc(ret, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
ret = xe_gt_sriov_pf_config_save(gt, vfid, tmp, ret);
if (ret > 0)
ret = simple_read_from_buffer(buf, count, pos, tmp, ret);
kfree(tmp);
return ret;
}
static ssize_t config_blob_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct dentry *dent = file_dentry(file);
struct dentry *parent = dent->d_parent;
struct xe_gt *gt = extract_gt(parent);
unsigned int vfid = extract_vfid(parent);
ssize_t ret;
void *tmp;
if (*pos)
return -EINVAL;
if (!count)
return -ENODATA;
if (count > SZ_4K)
return -EINVAL;
tmp = kzalloc(count, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
if (copy_from_user(tmp, buf, count)) {
ret = -EFAULT;
} else {
ret = xe_gt_sriov_pf_config_restore(gt, vfid, tmp, count);
if (!ret)
ret = count;
}
kfree(tmp);
return ret;
}
static const struct file_operations config_blob_ops = {
.owner = THIS_MODULE,
.read = config_blob_read,
.write = config_blob_write,
.llseek = default_llseek,
};
/**
* xe_gt_sriov_pf_debugfs_register - Register SR-IOV PF specific entries in GT debugfs.
* @gt: the &xe_gt to register
* @root: the &dentry that represents the GT directory
*
* Register SR-IOV PF entries that are GT related and must be shown under GT debugfs.
*/
void xe_gt_sriov_pf_debugfs_register(struct xe_gt *gt, struct dentry *root)
{
struct xe_device *xe = gt_to_xe(gt);
struct drm_minor *minor = xe->drm.primary;
int n, totalvfs = xe_sriov_pf_get_totalvfs(xe);
struct dentry *pfdentry;
struct dentry *vfdentry;
char buf[14]; /* should be enough up to "vf%u\0" for 2^32 - 1 */
xe_gt_assert(gt, IS_SRIOV_PF(xe));
xe_gt_assert(gt, root->d_inode->i_private == gt);
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── pf
*/
pfdentry = debugfs_create_dir("pf" , root);
if (IS_ERR(pfdentry))
return ;
pfdentry->d_inode->i_private = gt;
drm_debugfs_create_files(pf_info, ARRAY_SIZE(pf_info), pfdentry, minor);
if (xe_gt_is_main_type(gt)) {
drm_debugfs_create_files(pf_ggtt_info,
ARRAY_SIZE(pf_ggtt_info),
pfdentry, minor);
if (xe_device_has_lmtt(gt_to_xe(gt)))
drm_debugfs_create_files(pf_lmem_info,
ARRAY_SIZE(pf_lmem_info),
pfdentry, minor);
}
pf_add_policy_attrs(gt, pfdentry);
pf_add_config_attrs(gt, pfdentry, PFID);
for (n = 1; n <= totalvfs; n++) {
/*
* /sys/kernel/debug/dri/0/
* ├── gt0
* │ ├── vf1
* │ ├── vf2
*/
snprintf(buf, sizeof (buf), "vf%u" , n);
vfdentry = debugfs_create_dir(buf, root);
if (IS_ERR(vfdentry))
break ;
vfdentry->d_inode->i_private = (void *)(uintptr_t)n;
pf_add_config_attrs(gt, vfdentry, VFID(n));
debugfs_create_file("control" , 0600, vfdentry, NULL, &control_ops);
/* for testing/debugging purposes only! */
if (IS_ENABLED(CONFIG_DRM_XE_DEBUG)) {
debugfs_create_file("guc_state" ,
IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV) ? 0600 : 0400,
vfdentry, NULL, &guc_state_ops);
debugfs_create_file("config_blob" ,
IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV) ? 0600 : 0400,
vfdentry, NULL, &config_blob_ops);
}
}
}
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