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70359c4a68
Instead of creating switch-specific attributes by hand, implement is_visible() method of attribute group and hide them when dealing with non-switch devices. This will ensure that all attributes are created together, before userspace gets notified of new device. Also, remove rio-sysfs.c from list of files that are scanned when compiling RapiodIO documentations as it no longer has any structured comments, and leaving it in leads to warning when building docs. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
371 lines
8 KiB
C
371 lines
8 KiB
C
/*
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* RapidIO sysfs attributes and support
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*
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* Copyright 2005 MontaVista Software, Inc.
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* Matt Porter <mporter@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/rio.h>
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#include <linux/rio_drv.h>
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#include <linux/stat.h>
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#include <linux/capability.h>
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#include "rio.h"
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/* Sysfs support */
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#define rio_config_attr(field, format_string) \
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static ssize_t \
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field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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struct rio_dev *rdev = to_rio_dev(dev); \
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\
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return sprintf(buf, format_string, rdev->field); \
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} \
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static DEVICE_ATTR_RO(field);
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rio_config_attr(did, "0x%04x\n");
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rio_config_attr(vid, "0x%04x\n");
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rio_config_attr(device_rev, "0x%08x\n");
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rio_config_attr(asm_did, "0x%04x\n");
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rio_config_attr(asm_vid, "0x%04x\n");
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rio_config_attr(asm_rev, "0x%04x\n");
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rio_config_attr(destid, "0x%04x\n");
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rio_config_attr(hopcount, "0x%02x\n");
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static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct rio_dev *rdev = to_rio_dev(dev);
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char *str = buf;
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int i;
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for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
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i++) {
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if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
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continue;
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str +=
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sprintf(str, "%04x %02x\n", i,
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rdev->rswitch->route_table[i]);
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}
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return (str - buf);
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}
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static DEVICE_ATTR_RO(routes);
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static ssize_t lprev_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct rio_dev *rdev = to_rio_dev(dev);
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return sprintf(buf, "%s\n",
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(rdev->prev) ? rio_name(rdev->prev) : "root");
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}
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static DEVICE_ATTR_RO(lprev);
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static ssize_t lnext_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct rio_dev *rdev = to_rio_dev(dev);
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char *str = buf;
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int i;
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if (rdev->pef & RIO_PEF_SWITCH) {
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for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) {
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if (rdev->rswitch->nextdev[i])
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str += sprintf(str, "%s\n",
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rio_name(rdev->rswitch->nextdev[i]));
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else
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str += sprintf(str, "null\n");
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}
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}
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return str - buf;
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}
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static DEVICE_ATTR_RO(lnext);
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static ssize_t modalias_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct rio_dev *rdev = to_rio_dev(dev);
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return sprintf(buf, "rapidio:v%04Xd%04Xav%04Xad%04X\n",
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rdev->vid, rdev->did, rdev->asm_vid, rdev->asm_did);
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}
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static DEVICE_ATTR_RO(modalias);
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static struct attribute *rio_dev_attrs[] = {
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&dev_attr_did.attr,
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&dev_attr_vid.attr,
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&dev_attr_device_rev.attr,
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&dev_attr_asm_did.attr,
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&dev_attr_asm_vid.attr,
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&dev_attr_asm_rev.attr,
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&dev_attr_lprev.attr,
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&dev_attr_destid.attr,
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&dev_attr_modalias.attr,
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/* Switch-only attributes */
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&dev_attr_routes.attr,
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&dev_attr_lnext.attr,
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&dev_attr_hopcount.attr,
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NULL,
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};
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static ssize_t
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rio_read_config(struct file *filp, struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t count)
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{
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struct rio_dev *dev = to_rio_dev(kobj_to_dev(kobj));
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unsigned int size = 0x100;
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loff_t init_off = off;
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u8 *data = (u8 *) buf;
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/* Several chips lock up trying to read undefined config space */
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if (capable(CAP_SYS_ADMIN))
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size = RIO_MAINT_SPACE_SZ;
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if (off >= size)
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return 0;
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if (off + count > size) {
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size -= off;
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count = size;
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} else {
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size = count;
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}
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if ((off & 1) && size) {
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u8 val;
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rio_read_config_8(dev, off, &val);
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data[off - init_off] = val;
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off++;
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size--;
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}
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if ((off & 3) && size > 2) {
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u16 val;
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rio_read_config_16(dev, off, &val);
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data[off - init_off] = (val >> 8) & 0xff;
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data[off - init_off + 1] = val & 0xff;
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off += 2;
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size -= 2;
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}
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while (size > 3) {
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u32 val;
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rio_read_config_32(dev, off, &val);
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data[off - init_off] = (val >> 24) & 0xff;
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data[off - init_off + 1] = (val >> 16) & 0xff;
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data[off - init_off + 2] = (val >> 8) & 0xff;
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data[off - init_off + 3] = val & 0xff;
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off += 4;
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size -= 4;
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}
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if (size >= 2) {
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u16 val;
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rio_read_config_16(dev, off, &val);
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data[off - init_off] = (val >> 8) & 0xff;
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data[off - init_off + 1] = val & 0xff;
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off += 2;
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size -= 2;
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}
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if (size > 0) {
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u8 val;
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rio_read_config_8(dev, off, &val);
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data[off - init_off] = val;
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off++;
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--size;
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}
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return count;
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}
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static ssize_t
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rio_write_config(struct file *filp, struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t count)
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{
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struct rio_dev *dev = to_rio_dev(kobj_to_dev(kobj));
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unsigned int size = count;
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loff_t init_off = off;
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u8 *data = (u8 *) buf;
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if (off >= RIO_MAINT_SPACE_SZ)
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return 0;
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if (off + count > RIO_MAINT_SPACE_SZ) {
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size = RIO_MAINT_SPACE_SZ - off;
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count = size;
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}
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if ((off & 1) && size) {
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rio_write_config_8(dev, off, data[off - init_off]);
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off++;
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size--;
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}
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if ((off & 3) && (size > 2)) {
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u16 val = data[off - init_off + 1];
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val |= (u16) data[off - init_off] << 8;
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rio_write_config_16(dev, off, val);
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off += 2;
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size -= 2;
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}
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while (size > 3) {
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u32 val = data[off - init_off + 3];
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val |= (u32) data[off - init_off + 2] << 8;
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val |= (u32) data[off - init_off + 1] << 16;
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val |= (u32) data[off - init_off] << 24;
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rio_write_config_32(dev, off, val);
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off += 4;
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size -= 4;
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}
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if (size >= 2) {
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u16 val = data[off - init_off + 1];
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val |= (u16) data[off - init_off] << 8;
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rio_write_config_16(dev, off, val);
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off += 2;
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size -= 2;
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}
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if (size) {
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rio_write_config_8(dev, off, data[off - init_off]);
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off++;
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--size;
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}
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return count;
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}
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static struct bin_attribute rio_config_attr = {
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.attr = {
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.name = "config",
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.mode = S_IRUGO | S_IWUSR,
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},
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.size = RIO_MAINT_SPACE_SZ,
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.read = rio_read_config,
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.write = rio_write_config,
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};
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static struct bin_attribute *rio_dev_bin_attrs[] = {
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&rio_config_attr,
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NULL,
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};
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static umode_t rio_dev_is_attr_visible(struct kobject *kobj,
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struct attribute *attr, int n)
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{
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struct rio_dev *rdev = to_rio_dev(kobj_to_dev(kobj));
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umode_t mode = attr->mode;
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if (!(rdev->pef & RIO_PEF_SWITCH) &&
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(attr == &dev_attr_routes.attr ||
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attr == &dev_attr_lnext.attr ||
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attr == &dev_attr_hopcount.attr)) {
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/*
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* Hide switch-specific attributes for a non-switch device.
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*/
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mode = 0;
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}
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return mode;
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}
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static const struct attribute_group rio_dev_group = {
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.attrs = rio_dev_attrs,
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.is_visible = rio_dev_is_attr_visible,
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.bin_attrs = rio_dev_bin_attrs,
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};
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const struct attribute_group *rio_dev_groups[] = {
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&rio_dev_group,
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NULL,
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};
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static ssize_t bus_scan_store(struct bus_type *bus, const char *buf,
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size_t count)
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{
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long val;
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int rc;
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if (kstrtol(buf, 0, &val) < 0)
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return -EINVAL;
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if (val == RIO_MPORT_ANY) {
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rc = rio_init_mports();
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goto exit;
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}
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if (val < 0 || val >= RIO_MAX_MPORTS)
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return -EINVAL;
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rc = rio_mport_scan((int)val);
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exit:
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if (!rc)
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rc = count;
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return rc;
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}
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static BUS_ATTR(scan, (S_IWUSR|S_IWGRP), NULL, bus_scan_store);
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static struct attribute *rio_bus_attrs[] = {
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&bus_attr_scan.attr,
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NULL,
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};
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static const struct attribute_group rio_bus_group = {
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.attrs = rio_bus_attrs,
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};
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const struct attribute_group *rio_bus_groups[] = {
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&rio_bus_group,
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NULL,
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};
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static ssize_t
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port_destid_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct rio_mport *mport = to_rio_mport(dev);
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if (mport)
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return sprintf(buf, "0x%04x\n", mport->host_deviceid);
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else
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return -ENODEV;
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}
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static DEVICE_ATTR_RO(port_destid);
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static ssize_t sys_size_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct rio_mport *mport = to_rio_mport(dev);
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if (mport)
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return sprintf(buf, "%u\n", mport->sys_size);
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else
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return -ENODEV;
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}
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static DEVICE_ATTR_RO(sys_size);
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static struct attribute *rio_mport_attrs[] = {
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&dev_attr_port_destid.attr,
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&dev_attr_sys_size.attr,
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NULL,
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};
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static const struct attribute_group rio_mport_group = {
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.attrs = rio_mport_attrs,
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};
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const struct attribute_group *rio_mport_groups[] = {
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&rio_mport_group,
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NULL,
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};
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