// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SN Platform GRU Driver
*
* PROC INTERFACES
*
* This file supports the /proc interfaces for the GRU driver
*
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <linux/proc_fs.h>
#include <linux/device.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include "gru.h"
#include "grulib.h"
#include "grutables.h"
#define printstat(s, f) printstat_val(s, &gru_stats.f, #f)
static void printstat_val(struct seq_file *s, atomic_long_t *v, char *id)
{
unsigned long val = atomic_long_read(v);
seq_printf(s, "%16lu %s\n", val, id);
}
static int statistics_show(struct seq_file *s, void *p)
{
printstat(s, vdata_alloc);
printstat(s, vdata_free);
printstat(s, gts_alloc);
printstat(s, gts_free);
printstat(s, gms_alloc);
printstat(s, gms_free);
printstat(s, gts_double_allocate);
printstat(s, assign_context);
printstat(s, assign_context_failed);
printstat(s, free_context);
printstat(s, load_user_context);
printstat(s, load_kernel_context);
printstat(s, lock_kernel_context);
printstat(s, unlock_kernel_context);
printstat(s, steal_user_context);
printstat(s, steal_kernel_context);
printstat(s, steal_context_failed);
printstat(s, nopfn);
printstat(s, asid_new);
printstat(s, asid_next);
printstat(s, asid_wrap);
printstat(s, asid_reuse);
printstat(s, intr);
printstat(s, intr_cbr);
printstat(s, intr_tfh);
printstat(s, intr_spurious);
printstat(s, intr_mm_lock_failed);
printstat(s, call_os);
printstat(s, call_os_wait_queue);
printstat(s, user_flush_tlb);
printstat(s, user_unload_context);
printstat(s, user_exception);
printstat(s, set_context_option);
printstat(s, check_context_retarget_intr);
printstat(s, check_context_unload);
printstat(s, tlb_dropin);
printstat(s, tlb_preload_page);
printstat(s, tlb_dropin_fail_no_asid);
printstat(s, tlb_dropin_fail_upm);
printstat(s, tlb_dropin_fail_invalid);
printstat(s, tlb_dropin_fail_range_active);
printstat(s, tlb_dropin_fail_idle);
printstat(s, tlb_dropin_fail_fmm);
printstat(s, tlb_dropin_fail_no_exception);
printstat(s, tfh_stale_on_fault);
printstat(s, mmu_invalidate_range);
printstat(s, mmu_invalidate_page);
printstat(s, flush_tlb);
printstat(s, flush_tlb_gru);
printstat(s, flush_tlb_gru_tgh);
printstat(s, flush_tlb_gru_zero_asid);
printstat(s, copy_gpa);
printstat(s, read_gpa);
printstat(s, mesq_receive);
printstat(s, mesq_receive_none);
printstat(s, mesq_send);
printstat(s, mesq_send_failed);
printstat(s, mesq_noop);
printstat(s, mesq_send_unexpected_error);
printstat(s, mesq_send_lb_overflow);
printstat(s, mesq_send_qlimit_reached);
printstat(s, mesq_send_amo_nacked);
printstat(s, mesq_send_put_nacked);
printstat(s, mesq_qf_locked);
printstat(s, mesq_qf_noop_not_full);
printstat(s, mesq_qf_switch_head_failed);
printstat(s, mesq_qf_unexpected_error);
printstat(s, mesq_noop_unexpected_error);
printstat(s, mesq_noop_lb_overflow);
printstat(s, mesq_noop_qlimit_reached);
printstat(s, mesq_noop_amo_nacked);
printstat(s, mesq_noop_put_nacked);
printstat(s, mesq_noop_page_overflow);
return 0;
}
static ssize_t statistics_write(struct file *file, const char __user *userbuf,
size_t count, loff_t *data)
{
memset(&gru_stats, 0, sizeof(gru_stats));
return count;
}
static int mcs_statistics_show(struct seq_file *s, void *p)
{
int op;
unsigned long total, count, max;
static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
"cch_interrupt_sync", "cch_deallocate", "tfh_write_only",
"tfh_write_restart", "tgh_invalidate"};
seq_printf(s, "%-20s%12s%12s%12s\n", "#id", "count", "aver-clks", "max-clks");
for (op = 0; op < mcsop_last; op++) {
count = atomic_long_read(&mcs_op_statistics[op].count);
total = atomic_long_read(&mcs_op_statistics[op].total);
max = mcs_op_statistics[op].max;
seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
count ? total / count : 0, max);
}
return 0;
}
static ssize_t mcs_statistics_write(struct file *file,
const char __user *userbuf, size_t count, loff_t *data)
{
memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
return count;
}
static int options_show(struct seq_file *s, void *p)
{
seq_printf(s, "#bitmask: 1=trace, 2=statistics\n");
seq_printf(s, "0x%lx\n", gru_options);
return 0;
}
static ssize_t options_write(struct file *file, const char __user *userbuf,
size_t count, loff_t *data)
{
int ret;
ret = kstrtoul_from_user(userbuf, count, 0, &gru_options);
if (ret)
return ret;
return count;
}
static int cch_seq_show(struct seq_file *file, void *data)
{
long gid = *(long *)data;
int i;
struct gru_state *gru = GID_TO_GRU(gid);
struct gru_thread_state *ts;
const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
if (gid == 0)
seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid",
"ctx#", "asid", "pid", "cbrs", "dsbytes", "mode");
if (gru)
for (i = 0; i < GRU_NUM_CCH; i++) {
ts = gru->gs_gts[i];
if (!ts)
continue;
seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",
gru->gs_gid, gru->gs_blade_id, i,
is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,
is_kernel_context(ts) ? 0 : ts->ts_tgid_owner,
ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
mode[ts->ts_user_options &
GRU_OPT_MISS_MASK]);
}
return 0;
}
static int gru_seq_show(struct seq_file *file, void *data)
{
long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
struct gru_state *gru = GID_TO_GRU(gid);
if (gid == 0) {
seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
"ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
"busy", "busy", "free", "free", "free");
}
if (gru) {
ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
ctxfree, cbrfree, dsrfree);
}
return 0;
}
static void seq_stop(struct seq_file *file, void *data)
{
}
static void *seq_start(struct seq_file *file, loff_t *gid)
{
if (*gid < gru_max_gids)
return gid;
return NULL;
}
static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
{
(*gid)++;
if (*gid < gru_max_gids)
return gid;
return NULL;
}
static const struct seq_operations cch_seq_ops = {
.start = seq_start,
.next = seq_next,
.stop = seq_stop,
.show = cch_seq_show
};
static const struct seq_operations gru_seq_ops = {
.start = seq_start,
.next = seq_next,
.stop = seq_stop,
.show = gru_seq_show
};
static int statistics_open(struct inode *inode, struct file *file)
{
return single_open(file, statistics_show, NULL);
}
static int mcs_statistics_open(struct inode *inode, struct file *file)
{
return single_open(file, mcs_statistics_show, NULL);
}
static int options_open(struct inode *inode, struct file *file)
{
return single_open(file, options_show, NULL);
}
/* *INDENT-OFF* */
static const struct file_operations statistics_fops = {
.open = statistics_open,
.read = seq_read,
.write = statistics_write,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations mcs_statistics_fops = {
.open = mcs_statistics_open,
.read = seq_read,
.write = mcs_statistics_write,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations options_fops = {
.open = options_open,
.read = seq_read,
.write = options_write,
.llseek = seq_lseek,
.release = single_release,
};
static struct proc_dir_entry *proc_gru __read_mostly;
int gru_proc_init(void)
{
proc_gru = proc_mkdir("sgi_uv/gru", NULL);
if (!proc_gru)
return -1;
if (!proc_create("statistics", 0644, proc_gru, &statistics_fops))
goto err;
if (!proc_create("mcs_statistics", 0644, proc_gru, &mcs_statistics_fops))
goto err;
if (!proc_create("debug_options", 0644, proc_gru, &options_fops))
goto err;
if (!proc_create_seq("cch_status", 0444, proc_gru, &cch_seq_ops))
goto err;
if (!proc_create_seq("gru_status", 0444, proc_gru, &gru_seq_ops))
goto err;
return 0;
err:
remove_proc_subtree("sgi_uv/gru", NULL);
return -1;
}
void gru_proc_exit(void)
{
remove_proc_subtree("sgi_uv/gru", NULL);
}
