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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
366 lines
7.7 KiB
C
366 lines
7.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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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#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 scan_store(struct bus_type *bus, const char *buf, 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_WO(scan);
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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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