| // 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); |
| } |