/* * 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. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #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) { char buf[20]; if (count >= sizeof(buf)) return -EINVAL; if (copy_from_user(buf, userbuf, count)) return -EFAULT; buf[count] = '\0'; if (strict_strtoul(buf, 0, &gru_options)) return -EINVAL; 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); } static int cch_open(struct inode *inode, struct file *file) { return seq_open(file, &cch_seq_ops); } static int gru_open(struct inode *inode, struct file *file) { return seq_open(file, &gru_seq_ops); } /* *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 const struct file_operations cch_fops = { .open = cch_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static const struct file_operations gru_fops = { .open = gru_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static struct proc_entry { char *name; umode_t mode; const struct file_operations *fops; struct proc_dir_entry *entry; } proc_files[] = { {"statistics", 0644, &statistics_fops}, {"mcs_statistics", 0644, &mcs_statistics_fops}, {"debug_options", 0644, &options_fops}, {"cch_status", 0444, &cch_fops}, {"gru_status", 0444, &gru_fops}, {NULL} }; /* *INDENT-ON* */ static struct proc_dir_entry *proc_gru __read_mostly; static int create_proc_file(struct proc_entry *p) { p->entry = proc_create(p->name, p->mode, proc_gru, p->fops); if (!p->entry) return -1; return 0; } static void delete_proc_files(void) { struct proc_entry *p; if (proc_gru) { for (p = proc_files; p->name; p++) if (p->entry) remove_proc_entry(p->name, proc_gru); remove_proc_entry("gru", proc_gru->parent); } } int gru_proc_init(void) { struct proc_entry *p; proc_gru = proc_mkdir("sgi_uv/gru", NULL); for (p = proc_files; p->name; p++) if (create_proc_file(p)) goto err; return 0; err: delete_proc_files(); return -1; } void gru_proc_exit(void) { delete_proc_files(); }