[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;

	if (!rdev->rswitch)
		goto out;

	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]);
	}

      out:
	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(routes),
	__ATTR_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 = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);

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