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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* GSP vGPU-IO Driver - Debugfs Interface
*/
#include "gsp_core.h"
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static int gsp_debugfs_vfs_show(struct seq_file *s, void *unused)
{
struct gsp_device *gsp = s->private;
struct gsp_vf *vf;
seq_printf(s, "%-4s %-12s %-10s %-18s %-18s\n",
"ID", "STATE", "REFCNT", "BAR1", "PAGE_TABLE");
mutex_lock(&gsp->vf_lock);
list_for_each_entry(vf, &gsp->vf_list, list) {
seq_printf(s, "%-4u %-12d %-10d 0x%016llx-0x%016llx 0x%016llx-0x%016llx\n",
vf->id, vf->state, atomic_read(&vf->refcount),
vf->bar1_offset, vf->bar1_offset + vf->bar1_size,
vf->pt_base, vf->pt_base + vf->pt_size);
}
mutex_unlock(&gsp->vf_lock);
return 0;
}
static int gsp_debugfs_vfs_open(struct inode *inode, struct file *file)
{
return single_open(file, gsp_debugfs_vfs_show, inode->i_private);
}
static const struct file_operations gsp_debugfs_vfs_fops = {
.open = gsp_debugfs_vfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int gsp_debugfs_vf_show(struct seq_file *s, void *unused)
{
struct gsp_vf *vf = s->private;
struct gsp_wpr_region *rgn;
seq_printf(s, "VF %u\n", vf->id);
seq_printf(s, " State: %d\n", vf->state);
seq_printf(s, " Refcount: %d\n", atomic_read(&vf->refcount));
seq_printf(s, " BAR1: 0x%llx - 0x%llx (size: 0x%llx)\n",
vf->bar1_offset, vf->bar1_offset + vf->bar1_size, vf->bar1_size);
seq_printf(s, " Page Table: 0x%llx - 0x%llx (size: 0x%llx)\n",
vf->pt_base, vf->pt_base + vf->pt_size, vf->pt_size);
seq_printf(s, " Cmd Buffer: 0x%llx - 0x%llx (size: 0x%llx)\n",
vf->cmd_base, vf->cmd_base + vf->cmd_size, vf->cmd_size);
seq_printf(s, " BAR State:\n");
seq_printf(s, " Aperture: 0x%llx - 0x%llx\n",
vf->bar_state.aperture_offset,
vf->bar_state.aperture_offset + vf->bar_state.aperture_size);
seq_printf(s, " ForceAcc: %s (VF: %u)\n",
vf->bar_state.force_access ? "enabled" : "disabled",
vf->bar_state.force_vf);
seq_printf(s, " WPR Regions:\n");
mutex_lock(&vf->wpr_lock);
list_for_each_entry(rgn, &vf->wpr_list, list) {
seq_printf(s, " [0x%llx, 0x%llx) flags=0x%x\n",
rgn->base, rgn->base + rgn->size, rgn->flags);
}
mutex_unlock(&vf->wpr_lock);
if (vf->migration) {
seq_printf(s, " Migration:\n");
seq_printf(s, " State: %d\n", vf->migration->state);
seq_printf(s, " Dst VF: %llu\n", vf->migration->dst_vf);
seq_printf(s, " Token: 0x%llx\n", vf->migration->token);
seq_printf(s, " Progress: %llu pages, %llu bytes\n",
vf->migration->progress.pages_transferred,
vf->migration->progress.bytes_transferred);
}
return 0;
}
static int gsp_debugfs_vf_open(struct inode *inode, struct file *file)
{
return single_open(file, gsp_debugfs_vf_show, inode->i_private);
}
static const struct file_operations gsp_debugfs_vf_fops = {
.open = gsp_debugfs_vf_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int gsp_debugfs_rpc_show(struct seq_file *s, void *unused)
{
struct gsp_device *gsp = s->private;
seq_printf(s, "RPC Statistics:\n");
seq_printf(s, " Total: %lld\n", atomic64_read(&gsp->rpc_total));
seq_printf(s, " Errors: %lld\n", atomic64_read(&gsp->rpc_errors));
seq_printf(s, " BAR Traps: %lld\n", atomic64_read(&gsp->bar_traps));
seq_printf(s, " WPR Events: %lld\n", atomic64_read(&gsp->wpr_events));
seq_printf(s, " Migrations: %lld\n", atomic64_read(&gsp->migrations));
return 0;
}
static int gsp_debugfs_rpc_open(struct inode *inode, struct file *file)
{
return single_open(file, gsp_debugfs_rpc_show, inode->i_private);
}
static const struct file_operations gsp_debugfs_rpc_fops = {
.open = gsp_debugfs_rpc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int gsp_debugfs_bar_show(struct seq_file *s, void *unused)
{
struct gsp_vf *vf = s->private;
seq_printf(s, "VF %u BAR State:\n", vf->id);
seq_printf(s, " Aperture Offset: 0x%llx\n", vf->bar_state.aperture_offset);
seq_printf(s, " Aperture Size: 0x%llx\n", vf->bar_state.aperture_size);
seq_printf(s, " Force Access: %s\n", vf->bar_state.force_access ? "enabled" : "disabled");
seq_printf(s, " Force VF: %u\n", vf->bar_state.force_vf);
seq_printf(s, " Backing Store: %p\n", vf->bar_state.backing_store);
seq_printf(s, " Backing Size: 0x%zx\n", vf->bar_state.backing_size);
return 0;
}
static int gsp_debugfs_bar_open(struct inode *inode, struct file *file)
{
return single_open(file, gsp_debugfs_bar_show, inode->i_private);
}
static const struct file_operations gsp_debugfs_bar_fops = {
.open = gsp_debugfs_bar_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int gsp_debugfs_wpr_show(struct seq_file *s, void *unused)
{
struct gsp_vf *vf = s->private;
struct gsp_wpr_region *rgn;
seq_printf(s, "VF %u WPR Regions:\n", vf->id);
mutex_lock(&vf->wpr_lock);
list_for_each_entry(rgn, &vf->wpr_list, list) {
seq_printf(s, " [0x%llx, 0x%llx) size=0x%llx flags=0x%x\n",
rgn->base, rgn->base + rgn->size, rgn->size, rgn->flags);
}
mutex_unlock(&vf->wpr_lock);
return 0;
}
static int gsp_debugfs_wpr_open(struct inode *inode, struct file *file)
{
return single_open(file, gsp_debugfs_wpr_show, inode->i_private);
}
static const struct file_operations gsp_debugfs_wpr_fops = {
.open = gsp_debugfs_wpr_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int gsp_debugfs_migration_show(struct seq_file *s, void *unused)
{
struct gsp_vf *vf = s->private;
if (!vf->migration) {
seq_printf(s, "No active migration\n");
return 0;
}
seq_printf(s, "VF %u Migration:\n", vf->id);
seq_printf(s, " State: %d\n", vf->migration->state);
seq_printf(s, " Destination VF: %llu\n", vf->migration->dst_vf);
seq_printf(s, " Token: 0x%llx\n", vf->migration->token);
seq_printf(s, " Flags: 0x%x\n", vf->migration->flags);
seq_printf(s, " Pages Xfer: %llu\n", vf->migration->progress.pages_transferred);
seq_printf(s, " Bytes Xfer: %llu\n", vf->migration->progress.bytes_transferred);
seq_printf(s, " Dirty Pages: %llu\n", vf->migration->progress.dirty_pages);
seq_printf(s, " Cancelled: %s\n", vf->migration->cancelled ? "yes" : "no");
return 0;
}
static int gsp_debugfs_migration_open(struct inode *inode, struct file *file)
{
return single_open(file, gsp_debugfs_migration_show, inode->i_private);
}
static const struct file_operations gsp_debugfs_migration_fops = {
.open = gsp_debugfs_migration_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* VF Debugfs Directory Creation */
static void gsp_debugfs_vf_create(struct gsp_vf *vf)
{
char name[16];
struct dentry *vf_dir;
snprintf(name, sizeof(name), "vf%u", vf->id);
vf_dir = debugfs_create_dir(name, vf->gsp->debugfs_vfs_dir);
if (!vf_dir)
return;
debugfs_create_file("status", 0444, vf_dir, vf, &gsp_debugfs_vf_fops);
debugfs_create_file("bar", 0444, vf_dir, vf, &gsp_debugfs_bar_fops);
debugfs_create_file("wpr", 0444, vf_dir, vf, &gsp_debugfs_wpr_fops);
debugfs_create_file("migration", 0444, vf_dir, vf, &gsp_debugfs_migration_fops);
}
/* Main Debugfs Init */
int gsp_debugfs_init(struct gsp_device *gsp)
{
gsp->debugfs_root = debugfs_create_dir("gsp-vgpu", NULL);
if (!gsp->debugfs_root)
return -ENOMEM;
debugfs_create_file("vfs", 0444, gsp->debugfs_root, gsp, &gsp_debugfs_vfs_fops);
debugfs_create_file("rpc", 0444, gsp->debugfs_root, gsp, &gsp_debugfs_rpc_fops);
gsp->debugfs_vfs_dir = debugfs_create_dir("vfs", gsp->debugfs_root);
if (!gsp->debugfs_vfs_dir) {
debugfs_remove_recursive(gsp->debugfs_root);
return -ENOMEM;
}
/* Create entries for existing VFs */
mutex_lock(&gsp->vf_lock);
struct gsp_vf *vf;
list_for_each_entry(vf, &gsp->vf_list, list)
gsp_debugfs_vf_create(vf);
mutex_unlock(&gsp->vf_lock);
return 0;
}
void gsp_debugfs_fini(struct gsp_device *gsp)
{
if (gsp->debugfs_root)
debugfs_remove_recursive(gsp->debugfs_root);
}
/* Export for VF creation/destruction */
void gsp_debugfs_vf_add(struct gsp_vf *vf)
{
gsp_debugfs_vf_create(vf);
}
void gsp_debugfs_vf_remove(struct gsp_vf *vf)
{
char name[16];
snprintf(name, sizeof(name), "vf%u", vf->id);
debugfs_remove_recursive(debugfs_lookup(name, vf->gsp->debugfs_vfs_dir));
}
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