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Commit 1d09d737 authored by Jack Steiner's avatar Jack Steiner Committed by Linus Torvalds
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GRU Driver: /proc interfaces 



This file externalizes some GRU state & statistics to the user using the
/proc file system.

Signed-off-by: default avatarJack Steiner <steiner@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9a0deecc

drivers/misc/sgi-gru/gruprocfs.c

0 → 100644
+336 −0
Original line number Diff line number Diff line 
/*

 * 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);



	if (val)

		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, vdata_double_alloc);

	printstat(s, gts_double_allocate);

	printstat(s, assign_context);

	printstat(s, assign_context_failed);

	printstat(s, free_context);

	printstat(s, load_context);

	printstat(s, unload_context);

	printstat(s, steal_context);

	printstat(s, steal_context_failed);

	printstat(s, nopfn);

	printstat(s, break_cow);

	printstat(s, asid_new);

	printstat(s, asid_next);

	printstat(s, asid_wrap);

	printstat(s, asid_reuse);

	printstat(s, intr);

	printstat(s, call_os);

	printstat(s, call_os_check_for_bug);

	printstat(s, call_os_wait_queue);

	printstat(s, user_flush_tlb);

	printstat(s, user_unload_context);

	printstat(s, user_exception);

	printstat(s, set_task_slice);

	printstat(s, migrate_check);

	printstat(s, migrated_retarget);

	printstat(s, migrated_unload);

	printstat(s, migrated_unload_delay);

	printstat(s, migrated_nopfn_retarget);

	printstat(s, migrated_nopfn_unload);

	printstat(s, tlb_dropin);

	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, mmu_invalidate_range);

	printstat(s, mmu_invalidate_page);

	printstat(s, mmu_clear_flush_young);

	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, 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_not_full);

	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);

	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 options_show(struct seq_file *s, void *p)

{

	seq_printf(s, "0x%lx\n", options);

	return 0;

}



static ssize_t options_write(struct file *file, const char __user *userbuf,

			     size_t count, loff_t *data)

{

	unsigned long val;

	char buf[80];



	if (copy_from_user

	    (buf, userbuf, count < sizeof(buf) ? count : sizeof(buf)))

		return -EFAULT;

	if (!strict_strtoul(buf, 10, &val))

		options = val;



	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%9s%6s%8s%8s\n", "gid", "bid",

			   "ctx#", "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%9d%6d%8d%8s\n",

				   gru->gs_gid, gru->gs_blade_id, i,

				   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_GRUS)

		return gid;

	return NULL;

}



static void *seq_next(struct seq_file *file, void *data, loff_t *gid)

{

	(*gid)++;

	if (*gid < GRU_MAX_GRUS)

		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 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 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;

	int mode;

	const struct file_operations *fops;

	struct proc_dir_entry *entry;

} proc_files[] = {

	{"statistics", 0644, &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 = create_proc_entry(p->name, p->mode, proc_gru);

	if (!p->entry)

		return -1;

	p->entry->proc_fops = p->fops;

	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", NULL);

	}

}



int gru_proc_init(void)

{

	struct proc_entry *p;



	proc_mkdir("sgi_uv", NULL);

	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();

}