[linux-2.6-block.git] / arch / s390 / pci / pci_debug.c

/*
 *  Copyright IBM Corp. 2012
 *
 *  Author(s):
 *    Jan Glauber <jang@linux.vnet.ibm.com>
 */

#define KMSG_COMPONENT "zpci"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/kernel.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <asm/debug.h>

#include <asm/pci_dma.h>

static struct dentry *debugfs_root;
debug_info_t *pci_debug_msg_id;
EXPORT_SYMBOL_GPL(pci_debug_msg_id);
debug_info_t *pci_debug_err_id;
EXPORT_SYMBOL_GPL(pci_debug_err_id);

static char *pci_perf_names[] = {
	/* hardware counters */
	"Load operations",
	"Store operations",
	"Store block operations",
	"Refresh operations",
	"DMA read bytes",
	"DMA write bytes",
	/* software counters */
	"Allocated pages",
	"Mapped pages",
	"Unmapped pages",
};

static int pci_perf_show(struct seq_file *m, void *v)
{
	struct zpci_dev *zdev = m->private;
	u64 *stat;
	int i;

	if (!zdev)
		return 0;
	if (!zdev->fmb) {
		seq_puts(m, "FMB statistics disabled\n");
		return 0;
	}

	/* header */
	seq_printf(m, "FMB @ %p\n", zdev->fmb);
	seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update);
	seq_printf(m, "Samples: %u\n", zdev->fmb->samples);
	seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update);

	/* hardware counters */
	stat = (u64 *) &zdev->fmb->ld_ops;
	for (i = 0; i < 4; i++)
		seq_printf(m, "%26s:\t%llu\n",
			   pci_perf_names[i], *(stat + i));
	if (zdev->fmb->dma_valid)
		for (i = 4; i < 6; i++)
			seq_printf(m, "%26s:\t%llu\n",
				   pci_perf_names[i], *(stat + i));
	/* software counters */
	for (i = 6; i < ARRAY_SIZE(pci_perf_names); i++)
		seq_printf(m, "%26s:\t%llu\n",
			   pci_perf_names[i],
			   atomic64_read((atomic64_t *) (stat + i)));

	return 0;
}

static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf,
				  size_t count, loff_t *off)
{
	struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private;
	unsigned long val;
	int rc;

	if (!zdev)
		return 0;

	rc = kstrtoul_from_user(ubuf, count, 10, &val);
	if (rc)
		return rc;

	switch (val) {
	case 0:
		rc = zpci_fmb_disable_device(zdev);
		if (rc)
			return rc;
		break;
	case 1:
		rc = zpci_fmb_enable_device(zdev);
		if (rc)
			return rc;
		break;
	}
	return count;
}

static int pci_perf_seq_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, pci_perf_show,
			   file_inode(filp)->i_private);
}

static const struct file_operations debugfs_pci_perf_fops = {
	.open	 = pci_perf_seq_open,
	.read	 = seq_read,
	.write	 = pci_perf_seq_write,
	.llseek  = seq_lseek,
	.release = single_release,
};

void zpci_debug_init_device(struct zpci_dev *zdev)
{
	zdev->debugfs_dev = debugfs_create_dir(dev_name(&zdev->pdev->dev),
					       debugfs_root);
	if (IS_ERR(zdev->debugfs_dev))
		zdev->debugfs_dev = NULL;

	zdev->debugfs_perf = debugfs_create_file("statistics",
				S_IFREG | S_IRUGO | S_IWUSR,
				zdev->debugfs_dev, zdev,
				&debugfs_pci_perf_fops);
	if (IS_ERR(zdev->debugfs_perf))
		zdev->debugfs_perf = NULL;
}

void zpci_debug_exit_device(struct zpci_dev *zdev)
{
	debugfs_remove(zdev->debugfs_perf);
	debugfs_remove(zdev->debugfs_dev);
}

int __init zpci_debug_init(void)
{
	/* event trace buffer */
	pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long));
	if (!pci_debug_msg_id)
		return -EINVAL;
	debug_register_view(pci_debug_msg_id, &debug_sprintf_view);
	debug_set_level(pci_debug_msg_id, 3);

	/* error log */
	pci_debug_err_id = debug_register("pci_error", 2, 1, 16);
	if (!pci_debug_err_id)
		return -EINVAL;
	debug_register_view(pci_debug_err_id, &debug_hex_ascii_view);
	debug_set_level(pci_debug_err_id, 6);

	debugfs_root = debugfs_create_dir("pci", NULL);
	return 0;
}

void zpci_debug_exit(void)
{
	debug_unregister(pci_debug_msg_id);
	debug_unregister(pci_debug_err_id);
	debugfs_remove(debugfs_root);
}
Commit	Line	Data
d0b08853 JG	1	/*
	2	* Copyright IBM Corp. 2012
	3	*
	4	* Author(s):
	5	* Jan Glauber <jang@linux.vnet.ibm.com>
	6	*/
	7
896cb7e6 GS	8	#define KMSG_COMPONENT "zpci"
896cb7e6 GS	9	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
d0b08853 JG	10
	11	#include <linux/kernel.h>
	12	#include <linux/seq_file.h>
	13	#include <linux/debugfs.h>
a2ab8333	14	#include <linux/export.h>
d0b08853 JG	15	#include <linux/pci.h>
	16	#include <asm/debug.h>
	17
	18	#include <asm/pci_dma.h>
	19
	20	static struct dentry *debugfs_root;
a2ab8333 SO	21	debug_info_t *pci_debug_msg_id;
	22	EXPORT_SYMBOL_GPL(pci_debug_msg_id);
	23	debug_info_t *pci_debug_err_id;
	24	EXPORT_SYMBOL_GPL(pci_debug_err_id);
d0b08853 JG	25
	26	static char *pci_perf_names[] = {
	27	/* hardware counters */
	28	"Load operations",
	29	"Store operations",
	30	"Store block operations",
	31	"Refresh operations",
	32	"DMA read bytes",
	33	"DMA write bytes",
	34	/* software counters */
	35	"Allocated pages",
	36	"Mapped pages",
	37	"Unmapped pages",
	38	};
	39
	40	static int pci_perf_show(struct seq_file m, void v)
	41	{
	42	struct zpci_dev *zdev = m->private;
	43	u64 *stat;
	44	int i;
	45
	46	if (!zdev)
	47	return 0;
c2f0b61d JP	48	if (!zdev->fmb) {
	49	seq_puts(m, "FMB statistics disabled\n");
	50	return 0;
	51	}
d0b08853 JG	52
	53	/* header */
	54	seq_printf(m, "FMB @ %p\n", zdev->fmb);
	55	seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update);
	56	seq_printf(m, "Samples: %u\n", zdev->fmb->samples);
	57	seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update);
	58
	59	/* hardware counters */
	60	stat = (u64 *) &zdev->fmb->ld_ops;
	61	for (i = 0; i < 4; i++)
	62	seq_printf(m, "%26s:\t%llu\n",
	63	pci_perf_names[i], *(stat + i));
	64	if (zdev->fmb->dma_valid)
	65	for (i = 4; i < 6; i++)
	66	seq_printf(m, "%26s:\t%llu\n",
	67	pci_perf_names[i], *(stat + i));
	68	/* software counters */
	69	for (i = 6; i < ARRAY_SIZE(pci_perf_names); i++)
	70	seq_printf(m, "%26s:\t%llu\n",
	71	pci_perf_names[i],
	72	atomic64_read((atomic64_t *) (stat + i)));
	73
	74	return 0;
	75	}
	76
	77	static ssize_t pci_perf_seq_write(struct file file, const char __user ubuf,
	78	size_t count, loff_t *off)
	79	{
	80	struct zpci_dev zdev = ((struct seq_file ) file->private_data)->private;
	81	unsigned long val;
	82	int rc;
	83
	84	if (!zdev)
	85	return 0;
	86
	87	rc = kstrtoul_from_user(ubuf, count, 10, &val);
	88	if (rc)
	89	return rc;
	90
	91	switch (val) {
	92	case 0:
	93	rc = zpci_fmb_disable_device(zdev);
	94	if (rc)
	95	return rc;
	96	break;
	97	case 1:
	98	rc = zpci_fmb_enable_device(zdev);
	99	if (rc)
	100	return rc;
	101	break;
	102	}
	103	return count;
	104	}
	105
	106	static int pci_perf_seq_open(struct inode inode, struct file filp)
	107	{
	108	return single_open(filp, pci_perf_show,
496ad9aa	109	file_inode(filp)->i_private);
d0b08853 JG	110	}
	111
	112	static const struct file_operations debugfs_pci_perf_fops = {
	113	.open = pci_perf_seq_open,
	114	.read = seq_read,
	115	.write = pci_perf_seq_write,
	116	.llseek = seq_lseek,
	117	.release = single_release,
	118	};
	119
d0b08853 JG	120	void zpci_debug_init_device(struct zpci_dev *zdev)
	121	{
	122	zdev->debugfs_dev = debugfs_create_dir(dev_name(&zdev->pdev->dev),
	123	debugfs_root);
	124	if (IS_ERR(zdev->debugfs_dev))
	125	zdev->debugfs_dev = NULL;
	126
	127	zdev->debugfs_perf = debugfs_create_file("statistics",
	128	S_IFREG \| S_IRUGO \| S_IWUSR,
	129	zdev->debugfs_dev, zdev,
	130	&debugfs_pci_perf_fops);
	131	if (IS_ERR(zdev->debugfs_perf))
	132	zdev->debugfs_perf = NULL;
d0b08853 JG	133	}
	134
	135	void zpci_debug_exit_device(struct zpci_dev *zdev)
	136	{
	137	debugfs_remove(zdev->debugfs_perf);
d0b08853 JG	138	debugfs_remove(zdev->debugfs_dev);
	139	}
	140
	141	int __init zpci_debug_init(void)
	142	{
	143	/* event trace buffer */
f7e1e65d	144	pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long));
d0b08853 JG	145	if (!pci_debug_msg_id)
	146	return -EINVAL;
	147	debug_register_view(pci_debug_msg_id, &debug_sprintf_view);
	148	debug_set_level(pci_debug_msg_id, 3);
d0b08853 JG	149
	150	/* error log */
	151	pci_debug_err_id = debug_register("pci_error", 2, 1, 16);
	152	if (!pci_debug_err_id)
	153	return -EINVAL;
	154	debug_register_view(pci_debug_err_id, &debug_hex_ascii_view);
	155	debug_set_level(pci_debug_err_id, 6);
d0b08853 JG	156
	157	debugfs_root = debugfs_create_dir("pci", NULL);
	158	return 0;
	159	}
	160
	161	void zpci_debug_exit(void)
	162	{
8c080bd0 ME	163	debug_unregister(pci_debug_msg_id);
8c080bd0 ME	164	debug_unregister(pci_debug_err_id);
d0b08853 JG	165	debugfs_remove(debugfs_root);
d0b08853 JG	166	}