/* * 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 <linux/capability.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); } } static ssize_t bus_scan_store(struct bus_type *bus, const char *buf, size_t count) { long val; struct rio_mport *port = NULL; int rc; if (kstrtol(buf, 0, &val) < 0) return -EINVAL; if (val == RIO_MPORT_ANY) { rc = rio_init_mports(); goto exit; } if (val < 0 || val >= RIO_MAX_MPORTS) return -EINVAL; port = rio_find_mport((int)val); if (!port) { pr_debug("RIO: %s: mport_%d not available\n", __func__, (int)val); return -EINVAL; } if (!port->nscan) return -EINVAL; if (port->host_deviceid >= 0) rc = port->nscan->enumerate(port, 0); else rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT); exit: if (!rc) rc = count; return rc; } struct bus_attribute rio_bus_attrs[] = { __ATTR(scan, (S_IWUSR|S_IWGRP), NULL, bus_scan_store), __ATTR_NULL };