[deliverable/linux.git] / drivers / rapidio / rio-sysfs.c

/*
 * RapidIO sysfs attributes and support
 *
 * Copyright 2005 MontaVista Software, Inc.
 * Matt Porter <mporter@kernel.crashing.org>
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/stat.h>

#include "rio.h"

/* Sysfs support */
#define rio_config_attr(field, format_string)					\
static ssize_t								\
field##_show(struct device *dev, struct device_attribute *attr, char *buf)			\
{									\
	struct rio_dev *rdev = to_rio_dev(dev);				\
									\
	return sprintf(buf, format_string, rdev->field);		\
}									\

rio_config_attr(did, "0x%04x\n");
rio_config_attr(vid, "0x%04x\n");
rio_config_attr(device_rev, "0x%08x\n");
rio_config_attr(asm_did, "0x%04x\n");
rio_config_attr(asm_vid, "0x%04x\n");
rio_config_attr(asm_rev, "0x%04x\n");
rio_config_attr(destid, "0x%04x\n");
rio_config_attr(hopcount, "0x%02x\n");

static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct rio_dev *rdev = to_rio_dev(dev);
	char *str = buf;
	int i;

	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
			i++) {
		if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
			continue;
		str +=
		    sprintf(str, "%04x %02x\n", i,
			    rdev->rswitch->route_table[i]);
	}

	return (str - buf);
}

static ssize_t lprev_show(struct device *dev,
			  struct device_attribute *attr, char *buf)
{
	struct rio_dev *rdev = to_rio_dev(dev);

	return sprintf(buf, "%s\n",
			(rdev->prev) ? rio_name(rdev->prev) : "root");
}

static ssize_t lnext_show(struct device *dev,
			  struct device_attribute *attr, char *buf)
{
	struct rio_dev *rdev = to_rio_dev(dev);
	char *str = buf;
	int i;

	if (rdev->pef & RIO_PEF_SWITCH) {
		for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) {
			if (rdev->rswitch->nextdev[i])
				str += sprintf(str, "%s\n",
					rio_name(rdev->rswitch->nextdev[i]));
			else
				str += sprintf(str, "null\n");
		}
	}

	return str - buf;
}

struct device_attribute rio_dev_attrs[] = {
	__ATTR_RO(did),
	__ATTR_RO(vid),
	__ATTR_RO(device_rev),
	__ATTR_RO(asm_did),
	__ATTR_RO(asm_vid),
	__ATTR_RO(asm_rev),
	__ATTR_RO(lprev),
	__ATTR_RO(destid),
	__ATTR_NULL,
};

static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL);
static DEVICE_ATTR(lnext, S_IRUGO, lnext_show, NULL);
static DEVICE_ATTR(hopcount, S_IRUGO, hopcount_show, NULL);

static ssize_t
rio_read_config(struct file *filp, struct kobject *kobj,
		struct bin_attribute *bin_attr,
		char *buf, loff_t off, size_t count)
{
	struct rio_dev *dev =
	    to_rio_dev(container_of(kobj, struct device, kobj));
	unsigned int size = 0x100;
	loff_t init_off = off;
	u8 *data = (u8 *) buf;

	/* Several chips lock up trying to read undefined config space */
	if (capable(CAP_SYS_ADMIN))
		size = RIO_MAINT_SPACE_SZ;

	if (off >= size)
		return 0;
	if (off + count > size) {
		size -= off;
		count = size;
	} else {
		size = count;
	}

	if ((off & 1) && size) {
		u8 val;
		rio_read_config_8(dev, off, &val);
		data[off - init_off] = val;
		off++;
		size--;
	}

	if ((off & 3) && size > 2) {
		u16 val;
		rio_read_config_16(dev, off, &val);
		data[off - init_off] = (val >> 8) & 0xff;
		data[off - init_off + 1] = val & 0xff;
		off += 2;
		size -= 2;
	}

	while (size > 3) {
		u32 val;
		rio_read_config_32(dev, off, &val);
		data[off - init_off] = (val >> 24) & 0xff;
		data[off - init_off + 1] = (val >> 16) & 0xff;
		data[off - init_off + 2] = (val >> 8) & 0xff;
		data[off - init_off + 3] = val & 0xff;
		off += 4;
		size -= 4;
	}

	if (size >= 2) {
		u16 val;
		rio_read_config_16(dev, off, &val);
		data[off - init_off] = (val >> 8) & 0xff;
		data[off - init_off + 1] = val & 0xff;
		off += 2;
		size -= 2;
	}

	if (size > 0) {
		u8 val;
		rio_read_config_8(dev, off, &val);
		data[off - init_off] = val;
		off++;
		--size;
	}

	return count;
}

static ssize_t
rio_write_config(struct file *filp, struct kobject *kobj,
		 struct bin_attribute *bin_attr,
		 char *buf, loff_t off, size_t count)
{
	struct rio_dev *dev =
	    to_rio_dev(container_of(kobj, struct device, kobj));
	unsigned int size = count;
	loff_t init_off = off;
	u8 *data = (u8 *) buf;

	if (off >= RIO_MAINT_SPACE_SZ)
		return 0;
	if (off + count > RIO_MAINT_SPACE_SZ) {
		size = RIO_MAINT_SPACE_SZ - off;
		count = size;
	}

	if ((off & 1) && size) {
		rio_write_config_8(dev, off, data[off - init_off]);
		off++;
		size--;
	}

	if ((off & 3) && (size > 2)) {
		u16 val = data[off - init_off + 1];
		val |= (u16) data[off - init_off] << 8;
		rio_write_config_16(dev, off, val);
		off += 2;
		size -= 2;
	}

	while (size > 3) {
		u32 val = data[off - init_off + 3];
		val |= (u32) data[off - init_off + 2] << 8;
		val |= (u32) data[off - init_off + 1] << 16;
		val |= (u32) data[off - init_off] << 24;
		rio_write_config_32(dev, off, val);
		off += 4;
		size -= 4;
	}

	if (size >= 2) {
		u16 val = data[off - init_off + 1];
		val |= (u16) data[off - init_off] << 8;
		rio_write_config_16(dev, off, val);
		off += 2;
		size -= 2;
	}

	if (size) {
		rio_write_config_8(dev, off, data[off - init_off]);
		off++;
		--size;
	}

	return count;
}

static struct bin_attribute rio_config_attr = {
	.attr = {
		 .name = "config",
		 .mode = S_IRUGO | S_IWUSR,
		 },
	.size = RIO_MAINT_SPACE_SZ,
	.read = rio_read_config,
	.write = rio_write_config,
};

/**
 * rio_create_sysfs_dev_files - create RIO specific sysfs files
 * @rdev: device whose entries should be created
 *
 * Create files when @rdev is added to sysfs.
 */
int rio_create_sysfs_dev_files(struct rio_dev *rdev)
{
	int err = 0;

	err = device_create_bin_file(&rdev->dev, &rio_config_attr);

	if (!err && (rdev->pef & RIO_PEF_SWITCH)) {
		err |= device_create_file(&rdev->dev, &dev_attr_routes);
		err |= device_create_file(&rdev->dev, &dev_attr_lnext);
		err |= device_create_file(&rdev->dev, &dev_attr_hopcount);
		if (!err && rdev->rswitch->sw_sysfs)
			err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
	}

	if (err)
		pr_warning("RIO: Failed to create attribute file(s) for %s\n",
			   rio_name(rdev));

	return err;
}

/**
 * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
 * @rdev: device whose entries we should free
 *
 * Cleanup when @rdev is removed from sysfs.
 */
void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
{
	device_remove_bin_file(&rdev->dev, &rio_config_attr);
	if (rdev->pef & RIO_PEF_SWITCH) {
		device_remove_file(&rdev->dev, &dev_attr_routes);
		device_remove_file(&rdev->dev, &dev_attr_lnext);
		device_remove_file(&rdev->dev, &dev_attr_hopcount);
		if (rdev->rswitch->sw_sysfs)
			rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
	}
}
Commit	Line	Data
394b701c MP	1	/*
	2	* RapidIO sysfs attributes and support
	3	*
	4	* Copyright 2005 MontaVista Software, Inc.
	5	* Matt Porter <mporter@kernel.crashing.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*/
	12
394b701c MP	13	#include <linux/kernel.h>
	14	#include <linux/rio.h>
	15	#include <linux/rio_drv.h>
	16	#include <linux/stat.h>
	17
	18	#include "rio.h"
	19
	20	/* Sysfs support */
	21	#define rio_config_attr(field, format_string) \
	22	static ssize_t \
6978bbc0	23	field##_show(struct device dev, struct device_attribute attr, char *buf) \
394b701c MP	24	{ \
	25	struct rio_dev *rdev = to_rio_dev(dev); \
	26	\
	27	return sprintf(buf, format_string, rdev->field); \
	28	} \
	29
	30	rio_config_attr(did, "0x%04x\n");
	31	rio_config_attr(vid, "0x%04x\n");
	32	rio_config_attr(device_rev, "0x%08x\n");
	33	rio_config_attr(asm_did, "0x%04x\n");
	34	rio_config_attr(asm_vid, "0x%04x\n");
	35	rio_config_attr(asm_rev, "0x%04x\n");
cd8b974f AB	36	rio_config_attr(destid, "0x%04x\n");
cd8b974f AB	37	rio_config_attr(hopcount, "0x%02x\n");
394b701c	38
6978bbc0	39	static ssize_t routes_show(struct device dev, struct device_attribute attr, char *buf)
394b701c MP	40	{
	41	struct rio_dev *rdev = to_rio_dev(dev);
	42	char *str = buf;
	43	int i;
	44
e0423236 ZW	45	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
e0423236 ZW	46	i++) {
394b701c MP	47	if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
	48	continue;
	49	str +=
	50	sprintf(str, "%04x %02x\n", i,
	51	rdev->rswitch->route_table[i]);
	52	}
	53
394b701c MP	54	return (str - buf);
	55	}
	56
cd8b974f AB	57	static ssize_t lprev_show(struct device *dev,
	58	struct device_attribute attr, char buf)
	59	{
	60	struct rio_dev *rdev = to_rio_dev(dev);
	61
	62	return sprintf(buf, "%s\n",
	63	(rdev->prev) ? rio_name(rdev->prev) : "root");
	64	}
	65
	66	static ssize_t lnext_show(struct device *dev,
	67	struct device_attribute attr, char buf)
	68	{
	69	struct rio_dev *rdev = to_rio_dev(dev);
	70	char *str = buf;
	71	int i;
	72
	73	if (rdev->pef & RIO_PEF_SWITCH) {
	74	for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) {
	75	if (rdev->rswitch->nextdev[i])
	76	str += sprintf(str, "%s\n",
	77	rio_name(rdev->rswitch->nextdev[i]));
	78	else
	79	str += sprintf(str, "null\n");
	80	}
	81	}
	82
	83	return str - buf;
	84	}
	85
394b701c MP	86	struct device_attribute rio_dev_attrs[] = {
	87	__ATTR_RO(did),
	88	__ATTR_RO(vid),
	89	__ATTR_RO(device_rev),
	90	__ATTR_RO(asm_did),
	91	__ATTR_RO(asm_vid),
	92	__ATTR_RO(asm_rev),
cd8b974f AB	93	__ATTR_RO(lprev),
cd8b974f AB	94	__ATTR_RO(destid),
394b701c MP	95	__ATTR_NULL,
	96	};
	97
ac38d723	98	static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL);
cd8b974f AB	99	static DEVICE_ATTR(lnext, S_IRUGO, lnext_show, NULL);
cd8b974f AB	100	static DEVICE_ATTR(hopcount, S_IRUGO, hopcount_show, NULL);
ac38d723	101
394b701c	102	static ssize_t
2c3c8bea CW	103	rio_read_config(struct file filp, struct kobject kobj,
2c3c8bea CW	104	struct bin_attribute *bin_attr,
91a69029	105	char *buf, loff_t off, size_t count)
394b701c MP	106	{
	107	struct rio_dev *dev =
	108	to_rio_dev(container_of(kobj, struct device, kobj));
	109	unsigned int size = 0x100;
	110	loff_t init_off = off;
	111	u8 data = (u8 ) buf;
	112
	113	/* Several chips lock up trying to read undefined config space */
	114	if (capable(CAP_SYS_ADMIN))
fe41947e	115	size = RIO_MAINT_SPACE_SZ;
394b701c	116
fe41947e	117	if (off >= size)
394b701c MP	118	return 0;
	119	if (off + count > size) {
	120	size -= off;
	121	count = size;
	122	} else {
	123	size = count;
	124	}
	125
	126	if ((off & 1) && size) {
	127	u8 val;
	128	rio_read_config_8(dev, off, &val);
	129	data[off - init_off] = val;
	130	off++;
	131	size--;
	132	}
	133
	134	if ((off & 3) && size > 2) {
	135	u16 val;
	136	rio_read_config_16(dev, off, &val);
	137	data[off - init_off] = (val >> 8) & 0xff;
	138	data[off - init_off + 1] = val & 0xff;
	139	off += 2;
	140	size -= 2;
	141	}
	142
	143	while (size > 3) {
	144	u32 val;
	145	rio_read_config_32(dev, off, &val);
	146	data[off - init_off] = (val >> 24) & 0xff;
	147	data[off - init_off + 1] = (val >> 16) & 0xff;
	148	data[off - init_off + 2] = (val >> 8) & 0xff;
	149	data[off - init_off + 3] = val & 0xff;
	150	off += 4;
	151	size -= 4;
	152	}
	153
	154	if (size >= 2) {
	155	u16 val;
	156	rio_read_config_16(dev, off, &val);
	157	data[off - init_off] = (val >> 8) & 0xff;
	158	data[off - init_off + 1] = val & 0xff;
	159	off += 2;
	160	size -= 2;
	161	}
	162
	163	if (size > 0) {
	164	u8 val;
	165	rio_read_config_8(dev, off, &val);
	166	data[off - init_off] = val;
	167	off++;
	168	--size;
	169	}
	170
	171	return count;
	172	}
	173
	174	static ssize_t
2c3c8bea CW	175	rio_write_config(struct file filp, struct kobject kobj,
2c3c8bea CW	176	struct bin_attribute *bin_attr,
91a69029	177	char *buf, loff_t off, size_t count)
394b701c MP	178	{
	179	struct rio_dev *dev =
	180	to_rio_dev(container_of(kobj, struct device, kobj));
	181	unsigned int size = count;
	182	loff_t init_off = off;
	183	u8 data = (u8 ) buf;
	184
fe41947e	185	if (off >= RIO_MAINT_SPACE_SZ)
394b701c	186	return 0;
fe41947e AB	187	if (off + count > RIO_MAINT_SPACE_SZ) {
fe41947e AB	188	size = RIO_MAINT_SPACE_SZ - off;
394b701c MP	189	count = size;
	190	}
	191
	192	if ((off & 1) && size) {
	193	rio_write_config_8(dev, off, data[off - init_off]);
	194	off++;
	195	size--;
	196	}
	197
	198	if ((off & 3) && (size > 2)) {
	199	u16 val = data[off - init_off + 1];
	200	val \|= (u16) data[off - init_off] << 8;
	201	rio_write_config_16(dev, off, val);
	202	off += 2;
	203	size -= 2;
	204	}
	205
	206	while (size > 3) {
	207	u32 val = data[off - init_off + 3];
	208	val \|= (u32) data[off - init_off + 2] << 8;
	209	val \|= (u32) data[off - init_off + 1] << 16;
	210	val \|= (u32) data[off - init_off] << 24;
	211	rio_write_config_32(dev, off, val);
	212	off += 4;
	213	size -= 4;
	214	}
	215
	216	if (size >= 2) {
	217	u16 val = data[off - init_off + 1];
	218	val \|= (u16) data[off - init_off] << 8;
	219	rio_write_config_16(dev, off, val);
	220	off += 2;
	221	size -= 2;
	222	}
	223
	224	if (size) {
	225	rio_write_config_8(dev, off, data[off - init_off]);
	226	off++;
	227	--size;
	228	}
	229
	230	return count;
	231	}
	232
	233	static struct bin_attribute rio_config_attr = {
	234	.attr = {
	235	.name = "config",
	236	.mode = S_IRUGO \| S_IWUSR,
394b701c	237	},
fe41947e	238	.size = RIO_MAINT_SPACE_SZ,
394b701c MP	239	.read = rio_read_config,
	240	.write = rio_write_config,
	241	};
	242
	243	/**
	244	* rio_create_sysfs_dev_files - create RIO specific sysfs files
	245	* @rdev: device whose entries should be created
	246	*
	247	* Create files when @rdev is added to sysfs.
	248	*/
	249	int rio_create_sysfs_dev_files(struct rio_dev *rdev)
	250	{
5f28c520	251	int err = 0;
394b701c	252
ac38d723 AB	253	err = device_create_bin_file(&rdev->dev, &rio_config_attr);
ac38d723 AB	254
ded05782	255	if (!err && (rdev->pef & RIO_PEF_SWITCH)) {
cd8b974f AB	256	err \|= device_create_file(&rdev->dev, &dev_attr_routes);
	257	err \|= device_create_file(&rdev->dev, &dev_attr_lnext);
	258	err \|= device_create_file(&rdev->dev, &dev_attr_hopcount);
ac38d723 AB	259	if (!err && rdev->rswitch->sw_sysfs)
	260	err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
	261	}
	262
	263	if (err)
	264	pr_warning("RIO: Failed to create attribute file(s) for %s\n",
	265	rio_name(rdev));
5f28c520 YL	266
5f28c520 YL	267	return err;
394b701c MP	268	}
	269
	270	/**
	271	* rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
	272	* @rdev: device whose entries we should free
	273	*
	274	* Cleanup when @rdev is removed from sysfs.
	275	*/
	276	void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
	277	{
ac38d723	278	device_remove_bin_file(&rdev->dev, &rio_config_attr);
ded05782	279	if (rdev->pef & RIO_PEF_SWITCH) {
ac38d723	280	device_remove_file(&rdev->dev, &dev_attr_routes);
cd8b974f AB	281	device_remove_file(&rdev->dev, &dev_attr_lnext);
cd8b974f AB	282	device_remove_file(&rdev->dev, &dev_attr_hopcount);
ac38d723 AB	283	if (rdev->rswitch->sw_sysfs)
	284	rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
	285	}
394b701c	286	}