[net-next-2.6.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");

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);
}

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_NULL,
};

static DEVICE_ATTR(routes, S_IRUGO, routes_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 = 0x200000;

	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 > 0x200000)
		return 0;
	if (off + count > 0x200000) {
		size = 0x200000 - 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 = 0x200000,
	.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->rswitch) {
		err = device_create_file(&rdev->dev, &dev_attr_routes);
		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->rswitch) {
		device_remove_file(&rdev->dev, &dev_attr_routes);
		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");
	36
6978bbc0	37	static ssize_t routes_show(struct device dev, struct device_attribute attr, char *buf)
394b701c MP	38	{
	39	struct rio_dev *rdev = to_rio_dev(dev);
	40	char *str = buf;
	41	int i;
	42
e0423236 ZW	43	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
e0423236 ZW	44	i++) {
394b701c MP	45	if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
	46	continue;
	47	str +=
	48	sprintf(str, "%04x %02x\n", i,
	49	rdev->rswitch->route_table[i]);
	50	}
	51
394b701c MP	52	return (str - buf);
	53	}
	54
	55	struct device_attribute rio_dev_attrs[] = {
	56	__ATTR_RO(did),
	57	__ATTR_RO(vid),
	58	__ATTR_RO(device_rev),
	59	__ATTR_RO(asm_did),
	60	__ATTR_RO(asm_vid),
	61	__ATTR_RO(asm_rev),
394b701c MP	62	__ATTR_NULL,
	63	};
	64
ac38d723 AB	65	static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL);
ac38d723 AB	66
394b701c	67	static ssize_t
2c3c8bea CW	68	rio_read_config(struct file filp, struct kobject kobj,
2c3c8bea CW	69	struct bin_attribute *bin_attr,
91a69029	70	char *buf, loff_t off, size_t count)
394b701c MP	71	{
	72	struct rio_dev *dev =
	73	to_rio_dev(container_of(kobj, struct device, kobj));
	74	unsigned int size = 0x100;
	75	loff_t init_off = off;
	76	u8 data = (u8 ) buf;
	77
	78	/* Several chips lock up trying to read undefined config space */
	79	if (capable(CAP_SYS_ADMIN))
	80	size = 0x200000;
	81
	82	if (off > size)
	83	return 0;
	84	if (off + count > size) {
	85	size -= off;
	86	count = size;
	87	} else {
	88	size = count;
	89	}
	90
	91	if ((off & 1) && size) {
	92	u8 val;
	93	rio_read_config_8(dev, off, &val);
	94	data[off - init_off] = val;
	95	off++;
	96	size--;
	97	}
	98
	99	if ((off & 3) && size > 2) {
	100	u16 val;
	101	rio_read_config_16(dev, off, &val);
	102	data[off - init_off] = (val >> 8) & 0xff;
	103	data[off - init_off + 1] = val & 0xff;
	104	off += 2;
	105	size -= 2;
	106	}
	107
	108	while (size > 3) {
	109	u32 val;
	110	rio_read_config_32(dev, off, &val);
	111	data[off - init_off] = (val >> 24) & 0xff;
	112	data[off - init_off + 1] = (val >> 16) & 0xff;
	113	data[off - init_off + 2] = (val >> 8) & 0xff;
	114	data[off - init_off + 3] = val & 0xff;
	115	off += 4;
	116	size -= 4;
	117	}
	118
	119	if (size >= 2) {
	120	u16 val;
	121	rio_read_config_16(dev, off, &val);
	122	data[off - init_off] = (val >> 8) & 0xff;
	123	data[off - init_off + 1] = val & 0xff;
	124	off += 2;
	125	size -= 2;
	126	}
	127
	128	if (size > 0) {
	129	u8 val;
	130	rio_read_config_8(dev, off, &val);
	131	data[off - init_off] = val;
	132	off++;
	133	--size;
	134	}
135
136	return count;
137	}
138
139	static ssize_t
2c3c8bea CW	140	rio_write_config(struct file filp, struct kobject kobj,
2c3c8bea CW	141	struct bin_attribute *bin_attr,
91a69029	142	char *buf, loff_t off, size_t count)
394b701c MP	143	{
	144	struct rio_dev *dev =
	145	to_rio_dev(container_of(kobj, struct device, kobj));
	146	unsigned int size = count;
	147	loff_t init_off = off;
	148	u8 data = (u8 ) buf;
	149
	150	if (off > 0x200000)
	151	return 0;
	152	if (off + count > 0x200000) {
	153	size = 0x200000 - off;
	154	count = size;
	155	}
	156
	157	if ((off & 1) && size) {
	158	rio_write_config_8(dev, off, data[off - init_off]);
	159	off++;
	160	size--;
	161	}
	162
	163	if ((off & 3) && (size > 2)) {
	164	u16 val = data[off - init_off + 1];
	165	val \|= (u16) data[off - init_off] << 8;
	166	rio_write_config_16(dev, off, val);
	167	off += 2;
	168	size -= 2;
	169	}
	170
	171	while (size > 3) {
	172	u32 val = data[off - init_off + 3];
	173	val \|= (u32) data[off - init_off + 2] << 8;
	174	val \|= (u32) data[off - init_off + 1] << 16;
	175	val \|= (u32) data[off - init_off] << 24;
	176	rio_write_config_32(dev, off, val);
	177	off += 4;
	178	size -= 4;
	179	}
	180
	181	if (size >= 2) {
	182	u16 val = data[off - init_off + 1];
	183	val \|= (u16) data[off - init_off] << 8;
	184	rio_write_config_16(dev, off, val);
	185	off += 2;
	186	size -= 2;
	187	}
	188
	189	if (size) {
	190	rio_write_config_8(dev, off, data[off - init_off]);
	191	off++;
	192	--size;
	193	}
	194
	195	return count;
	196	}
	197
	198	static struct bin_attribute rio_config_attr = {
	199	.attr = {
	200	.name = "config",
	201	.mode = S_IRUGO \| S_IWUSR,
394b701c MP	202	},
	203	.size = 0x200000,
	204	.read = rio_read_config,
	205	.write = rio_write_config,
	206	};
	207
	208	/**
	209	* rio_create_sysfs_dev_files - create RIO specific sysfs files
	210	* @rdev: device whose entries should be created
	211	*
	212	* Create files when @rdev is added to sysfs.
	213	*/
	214	int rio_create_sysfs_dev_files(struct rio_dev *rdev)
	215	{
5f28c520	216	int err = 0;
394b701c	217
ac38d723 AB	218	err = device_create_bin_file(&rdev->dev, &rio_config_attr);
	219
	220	if (!err && rdev->rswitch) {
	221	err = device_create_file(&rdev->dev, &dev_attr_routes);
	222	if (!err && rdev->rswitch->sw_sysfs)
	223	err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
	224	}
	225
	226	if (err)
	227	pr_warning("RIO: Failed to create attribute file(s) for %s\n",
	228	rio_name(rdev));
5f28c520 YL	229
5f28c520 YL	230	return err;
394b701c MP	231	}
	232
	233	/**
	234	* rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
	235	* @rdev: device whose entries we should free
	236	*
	237	* Cleanup when @rdev is removed from sysfs.
	238	*/
	239	void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
	240	{
ac38d723 AB	241	device_remove_bin_file(&rdev->dev, &rio_config_attr);
	242	if (rdev->rswitch) {
	243	device_remove_file(&rdev->dev, &dev_attr_routes);
	244	if (rdev->rswitch->sw_sysfs)
	245	rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
	246	}
394b701c	247	}