[linux-block.git] / drivers / misc / sgi-gru / gruprocfs.c

// 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);
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1d09d737 JS	2	/*
	3	* SN Platform GRU Driver
	4	*
	5	* PROC INTERFACES
	6	*
	7	* This file supports the /proc interfaces for the GRU driver
	8	*
	9	* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
1d09d737 JS	10	*/
	11
	12	#include <linux/proc_fs.h>
	13	#include <linux/device.h>
	14	#include <linux/seq_file.h>
	15	#include <linux/uaccess.h>
	16	#include "gru.h"
	17	#include "grulib.h"
	18	#include "grutables.h"
	19
	20	#define printstat(s, f) printstat_val(s, &gru_stats.f, #f)
	21
	22	static void printstat_val(struct seq_file s, atomic_long_t v, char *id)
	23	{
	24	unsigned long val = atomic_long_read(v);
	25
563447d7	26	seq_printf(s, "%16lu %s\n", val, id);
1d09d737 JS	27	}
	28
	29	static int statistics_show(struct seq_file s, void p)
	30	{
	31	printstat(s, vdata_alloc);
	32	printstat(s, vdata_free);
	33	printstat(s, gts_alloc);
	34	printstat(s, gts_free);
563447d7 JS	35	printstat(s, gms_alloc);
563447d7 JS	36	printstat(s, gms_free);
1d09d737 JS	37	printstat(s, gts_double_allocate);
	38	printstat(s, assign_context);
	39	printstat(s, assign_context_failed);
	40	printstat(s, free_context);
836ce679 JS	41	printstat(s, load_user_context);
	42	printstat(s, load_kernel_context);
	43	printstat(s, lock_kernel_context);
	44	printstat(s, unlock_kernel_context);
	45	printstat(s, steal_user_context);
	46	printstat(s, steal_kernel_context);
1d09d737 JS	47	printstat(s, steal_context_failed);
1d09d737 JS	48	printstat(s, nopfn);
1d09d737 JS	49	printstat(s, asid_new);
	50	printstat(s, asid_next);
	51	printstat(s, asid_wrap);
	52	printstat(s, asid_reuse);
	53	printstat(s, intr);
563447d7 JS	54	printstat(s, intr_cbr);
563447d7 JS	55	printstat(s, intr_tfh);
2ce4d4c9	56	printstat(s, intr_spurious);
43884604	57	printstat(s, intr_mm_lock_failed);
1d09d737	58	printstat(s, call_os);
1d09d737 JS	59	printstat(s, call_os_wait_queue);
	60	printstat(s, user_flush_tlb);
	61	printstat(s, user_unload_context);
	62	printstat(s, user_exception);
92b39388	63	printstat(s, set_context_option);
55484c45 JS	64	printstat(s, check_context_retarget_intr);
55484c45 JS	65	printstat(s, check_context_unload);
1d09d737	66	printstat(s, tlb_dropin);
c550222f	67	printstat(s, tlb_preload_page);
1d09d737 JS	68	printstat(s, tlb_dropin_fail_no_asid);
	69	printstat(s, tlb_dropin_fail_upm);
	70	printstat(s, tlb_dropin_fail_invalid);
	71	printstat(s, tlb_dropin_fail_range_active);
	72	printstat(s, tlb_dropin_fail_idle);
	73	printstat(s, tlb_dropin_fail_fmm);
cd1334f0	74	printstat(s, tlb_dropin_fail_no_exception);
270952a9	75	printstat(s, tfh_stale_on_fault);
1d09d737 JS	76	printstat(s, mmu_invalidate_range);
1d09d737 JS	77	printstat(s, mmu_invalidate_page);
1d09d737 JS	78	printstat(s, flush_tlb);
	79	printstat(s, flush_tlb_gru);
	80	printstat(s, flush_tlb_gru_tgh);
	81	printstat(s, flush_tlb_gru_zero_asid);
	82	printstat(s, copy_gpa);
289750d1	83	printstat(s, read_gpa);
1d09d737 JS	84	printstat(s, mesq_receive);
	85	printstat(s, mesq_receive_none);
	86	printstat(s, mesq_send);
	87	printstat(s, mesq_send_failed);
	88	printstat(s, mesq_noop);
	89	printstat(s, mesq_send_unexpected_error);
	90	printstat(s, mesq_send_lb_overflow);
	91	printstat(s, mesq_send_qlimit_reached);
	92	printstat(s, mesq_send_amo_nacked);
	93	printstat(s, mesq_send_put_nacked);
1d09d737 JS	94	printstat(s, mesq_qf_locked);
	95	printstat(s, mesq_qf_noop_not_full);
	96	printstat(s, mesq_qf_switch_head_failed);
	97	printstat(s, mesq_qf_unexpected_error);
	98	printstat(s, mesq_noop_unexpected_error);
	99	printstat(s, mesq_noop_lb_overflow);
	100	printstat(s, mesq_noop_qlimit_reached);
	101	printstat(s, mesq_noop_amo_nacked);
	102	printstat(s, mesq_noop_put_nacked);
563447d7	103	printstat(s, mesq_noop_page_overflow);
1d09d737 JS	104	return 0;
	105	}
	106
	107	static ssize_t statistics_write(struct file file, const char __user userbuf,
	108	size_t count, loff_t *data)
	109	{
	110	memset(&gru_stats, 0, sizeof(gru_stats));
	111	return count;
	112	}
	113
e56484da JS	114	static int mcs_statistics_show(struct seq_file s, void p)
	115	{
	116	int op;
	117	unsigned long total, count, max;
	118	static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
c550222f JS	119	"cch_interrupt_sync", "cch_deallocate", "tfh_write_only",
c550222f JS	120	"tfh_write_restart", "tgh_invalidate"};
e56484da	121
563447d7	122	seq_printf(s, "%-20s%12s%12s%12s\n", "#id", "count", "aver-clks", "max-clks");
e56484da JS	123	for (op = 0; op < mcsop_last; op++) {
	124	count = atomic_long_read(&mcs_op_statistics[op].count);
	125	total = atomic_long_read(&mcs_op_statistics[op].total);
	126	max = mcs_op_statistics[op].max;
	127	seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
	128	count ? total / count : 0, max);
	129	}
	130	return 0;
	131	}
	132
	133	static ssize_t mcs_statistics_write(struct file *file,
	134	const char __user userbuf, size_t count, loff_t data)
	135	{
	136	memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
	137	return count;
	138	}
	139
1d09d737 JS	140	static int options_show(struct seq_file s, void p)
1d09d737 JS	141	{
563447d7	142	seq_printf(s, "#bitmask: 1=trace, 2=statistics\n");
9ca8e40c	143	seq_printf(s, "0x%lx\n", gru_options);
1d09d737 JS	144	return 0;
	145	}
	146
	147	static ssize_t options_write(struct file file, const char __user userbuf,
	148	size_t count, loff_t *data)
	149	{
f7b41276	150	int ret;
1d09d737	151
f7b41276 JH	152	ret = kstrtoul_from_user(userbuf, count, 0, &gru_options);
	153	if (ret)
	154	return ret;
1d09d737 JS	155
	156	return count;
	157	}
	158
	159	static int cch_seq_show(struct seq_file file, void data)
	160	{
	161	long gid = (long )data;
	162	int i;
	163	struct gru_state *gru = GID_TO_GRU(gid);
	164	struct gru_thread_state *ts;
	165	const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
	166
	167	if (gid == 0)
563447d7 JS	168	seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid",
563447d7 JS	169	"ctx#", "asid", "pid", "cbrs", "dsbytes", "mode");
1d09d737 JS	170	if (gru)
	171	for (i = 0; i < GRU_NUM_CCH; i++) {
	172	ts = gru->gs_gts[i];
	173	if (!ts)
	174	continue;
563447d7	175	seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",
1d09d737	176	gru->gs_gid, gru->gs_blade_id, i,
563447d7 JS	177	is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,
563447d7 JS	178	is_kernel_context(ts) ? 0 : ts->ts_tgid_owner,
1d09d737 JS	179	ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
	180	ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
	181	mode[ts->ts_user_options &
	182	GRU_OPT_MISS_MASK]);
	183	}
	184
	185	return 0;
	186	}
	187
	188	static int gru_seq_show(struct seq_file file, void data)
	189	{
	190	long gid = (long )data, ctxfree, cbrfree, dsrfree;
	191	struct gru_state *gru = GID_TO_GRU(gid);
	192
	193	if (gid == 0) {
	194	seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
	195	"ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
	196	seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
	197	"busy", "busy", "free", "free", "free");
	198	}
	199	if (gru) {
	200	ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
	201	cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
	202	dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
	203	seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
	204	gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
	205	GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
	206	ctxfree, cbrfree, dsrfree);
	207	}
	208
	209	return 0;
	210	}
	211
	212	static void seq_stop(struct seq_file file, void data)
	213	{
	214	}
	215
	216	static void seq_start(struct seq_file file, loff_t *gid)
	217	{
e1c3219d	218	if (*gid < gru_max_gids)
1d09d737 JS	219	return gid;
	220	return NULL;
	221	}
	222
	223	static void seq_next(struct seq_file file, void data, loff_t gid)
	224	{
	225	(*gid)++;
e1c3219d	226	if (*gid < gru_max_gids)
1d09d737 JS	227	return gid;
	228	return NULL;
	229	}
	230
	231	static const struct seq_operations cch_seq_ops = {
	232	.start = seq_start,
	233	.next = seq_next,
	234	.stop = seq_stop,
	235	.show = cch_seq_show
	236	};
	237
	238	static const struct seq_operations gru_seq_ops = {
	239	.start = seq_start,
	240	.next = seq_next,
	241	.stop = seq_stop,
	242	.show = gru_seq_show
	243	};
	244
	245	static int statistics_open(struct inode inode, struct file file)
	246	{
	247	return single_open(file, statistics_show, NULL);
	248	}
	249
e56484da JS	250	static int mcs_statistics_open(struct inode inode, struct file file)
	251	{
	252	return single_open(file, mcs_statistics_show, NULL);
	253	}
	254
1d09d737 JS	255	static int options_open(struct inode inode, struct file file)
	256	{
	257	return single_open(file, options_show, NULL);
	258	}
	259
1d09d737 JS	260	/* INDENT-OFF */
	261	static const struct file_operations statistics_fops = {
	262	.open = statistics_open,
	263	.read = seq_read,
	264	.write = statistics_write,
	265	.llseek = seq_lseek,
	266	.release = single_release,
	267	};
	268
e56484da JS	269	static const struct file_operations mcs_statistics_fops = {
	270	.open = mcs_statistics_open,
	271	.read = seq_read,
	272	.write = mcs_statistics_write,
	273	.llseek = seq_lseek,
	274	.release = single_release,
	275	};
	276
1d09d737 JS	277	static const struct file_operations options_fops = {
	278	.open = options_open,
	279	.read = seq_read,
	280	.write = options_write,
	281	.llseek = seq_lseek,
	282	.release = single_release,
	283	};
	284
1d09d737 JS	285	static struct proc_dir_entry *proc_gru __read_mostly;
1d09d737 JS	286
1d09d737 JS	287	int gru_proc_init(void)
1d09d737 JS	288	{
1d09d737	289	proc_gru = proc_mkdir("sgi_uv/gru", NULL);
978547c5 CH	290	if (!proc_gru)
	291	return -1;
	292	if (!proc_create("statistics", 0644, proc_gru, &statistics_fops))
	293	goto err;
	294	if (!proc_create("mcs_statistics", 0644, proc_gru, &mcs_statistics_fops))
	295	goto err;
	296	if (!proc_create("debug_options", 0644, proc_gru, &options_fops))
	297	goto err;
	298	if (!proc_create_seq("cch_status", 0444, proc_gru, &cch_seq_ops))
	299	goto err;
	300	if (!proc_create_seq("gru_status", 0444, proc_gru, &gru_seq_ops))
	301	goto err;
1d09d737	302	return 0;
1d09d737	303	err:
978547c5	304	remove_proc_subtree("sgi_uv/gru", NULL);
1d09d737 JS	305	return -1;
	306	}
	307
	308	void gru_proc_exit(void)
	309	{
978547c5	310	remove_proc_subtree("sgi_uv/gru", NULL);
1d09d737	311	}