| /* |
| * 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); |
| } |
| } |
