i2o_proc.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/*
 *   procfs handler for Linux I2O subsystem
 *
 *   (c) Copyright 1999 Deepak Saxena
 *   
 *   Originally written by Deepak Saxena([e-mail])
 *
 *   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.
 *
 *   This is an initial test release. The code is based on the design
 *   of the ide procfs system (drivers/block/ide-proc.c). Some code
 *   taken from i2o-core module by Alan Cox.
 *
 *   DISCLAIMER: This code is still under development/test and may cause
 *   your system to behave unpredictably.  Use at your own discretion.
 *
 *   LAN entries by Juha Siev鋘en ([e-mail]),
 *		    Auvo H鋕kinen ([e-mail])
 *   University of Helsinki, Department of Computer Science
 */

/*
 * set tabstop=3
 */

/*
 * TODO List
 *
 * - Add support for any version 2.0 spec changes once 2.0 IRTOS is
 *   is available to test with
 * - Clean up code to use official structure definitions 
 */

// FIXME!
#define FMT_U64_HEX "0x%08x%08x"
#define U64_VAL(pu64) *((u32*)(pu64)+1), *((u32*)(pu64))

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/i2o.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/spinlock.h>

#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>

#include "i2o_lan.h"

/*
 * Structure used to define /proc entries
 */
typedef struct _i2o_proc_entry_t
{
	char *name;			/* entry name */
	mode_t mode;			/* mode */
	read_proc_t *read_proc;		/* read func */
	write_proc_t *write_proc;	/* write func */
} i2o_proc_entry;

// #define DRIVERDEBUG

static int i2o_proc_read_lct(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_hrt(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_status(char *, char **, off_t, int, int *, void *);

static int i2o_proc_read_hw(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_ddm_table(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_driver_store(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_drivers_stored(char *, char **, off_t, int, int *, void *);

static int i2o_proc_read_groups(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_phys_device(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_claimed(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_users(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_priv_msgs(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_authorized_users(char *, char **, off_t, int, int *, void *);

static int i2o_proc_read_dev_name(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_dev_identity(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_ddm_identity(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_uinfo(char *, char **, off_t, int, int *, void *);
static int i2o_proc_read_sgl_limits(char *, char **, off_t, int, int *, void *);

static int i2o_proc_read_sensors(char *, char **, off_t, int, int *, void *);

static int print_serial_number(char *, int, u8 *, int);

static int i2o_proc_create_entries(void *, i2o_proc_entry *,
				   struct proc_dir_entry *);
static void i2o_proc_remove_entries(i2o_proc_entry *, struct proc_dir_entry *);
static int i2o_proc_add_controller(struct i2o_controller *, 
				   struct proc_dir_entry * );
static void i2o_proc_remove_controller(struct i2o_controller *, 
				       struct proc_dir_entry * );
static void i2o_proc_add_device(struct i2o_device *, struct proc_dir_entry *);
static void i2o_proc_remove_device(struct i2o_device *);
static int create_i2o_procfs(void);
static int destroy_i2o_procfs(void);
static void i2o_proc_new_dev(struct i2o_controller *, struct i2o_device *);
static void i2o_proc_dev_del(struct i2o_controller *, struct i2o_device *);

static int i2o_proc_read_lan_dev_info(char *, char **, off_t, int, int *,
				      void *);
static int i2o_proc_read_lan_mac_addr(char *, char **, off_t, int, int *,
				      void *);
static int i2o_proc_read_lan_mcast_addr(char *, char **, off_t, int, int *,
					void *);
static int i2o_proc_read_lan_batch_control(char *, char **, off_t, int, int *,
					   void *);
static int i2o_proc_read_lan_operation(char *, char **, off_t, int, int *,
				       void *);
static int i2o_proc_read_lan_media_operation(char *, char **, off_t, int,
					     int *, void *);
static int i2o_proc_read_lan_alt_addr(char *, char **, off_t, int, int *,
				      void *);
static int i2o_proc_read_lan_tx_info(char *, char **, off_t, int, int *,
				     void *);
static int i2o_proc_read_lan_rx_info(char *, char **, off_t, int, int *,
				     void *);
static int i2o_proc_read_lan_hist_stats(char *, char **, off_t, int, int *,
					void *);
static int i2o_proc_read_lan_eth_stats(char *, char **, off_t, int,
				       int *, void *);
static int i2o_proc_read_lan_tr_stats(char *, char **, off_t, int, int *,
				      void *);
static int i2o_proc_read_lan_fddi_stats(char *, char **, off_t, int, int *,
					void *);

static struct proc_dir_entry *i2o_proc_dir_root;

/*
 * I2O OSM descriptor
 */
static struct i2o_handler i2o_proc_handler =
{
	NULL,
	i2o_proc_new_dev,
	i2o_proc_dev_del,
	NULL,
	"I2O procfs Layer",
	0,
	0xffffffff	// All classes
};

/*
 * IOP specific entries...write field just in case someone 
 * ever wants one.
 */
static i2o_proc_entry generic_iop_entries[] = 
{
	{"hrt", S_IFREG|S_IRUGO, i2o_proc_read_hrt, NULL},
	{"lct", S_IFREG|S_IRUGO, i2o_proc_read_lct, NULL},
	{"status", S_IFREG|S_IRUGO, i2o_proc_read_status, NULL},
	{"hw", S_IFREG|S_IRUGO, i2o_proc_read_hw, NULL},
	{"ddm_table", S_IFREG|S_IRUGO, i2o_proc_read_ddm_table, NULL},
	{"driver_store", S_IFREG|S_IRUGO, i2o_proc_read_driver_store, NULL},
	{"drivers_stored", S_IFREG|S_IRUGO, i2o_proc_read_drivers_stored, NULL},
	{NULL, 0, NULL, NULL}
};

/*
 * Device specific entries
 */
static i2o_proc_entry generic_dev_entries[] = 
{
	{"groups", S_IFREG|S_IRUGO, i2o_proc_read_groups, NULL},
	{"phys_dev", S_IFREG|S_IRUGO, i2o_proc_read_phys_device, NULL},
	{"claimed", S_IFREG|S_IRUGO, i2o_proc_read_claimed, NULL},
	{"users", S_IFREG|S_IRUGO, i2o_proc_read_users, NULL},
	{"priv_msgs", S_IFREG|S_IRUGO, i2o_proc_read_priv_msgs, NULL},
	{"authorized_users", S_IFREG|S_IRUGO, i2o_proc_read_authorized_users, NULL},
	{"dev_identity", S_IFREG|S_IRUGO, i2o_proc_read_dev_identity, NULL},
	{"ddm_identity", S_IFREG|S_IRUGO, i2o_proc_read_ddm_identity, NULL},
	{"user_info", S_IFREG|S_IRUGO, i2o_proc_read_uinfo, NULL},
	{"sgl_limits", S_IFREG|S_IRUGO, i2o_proc_read_sgl_limits, NULL},
	{"sensors", S_IFREG|S_IRUGO, i2o_proc_read_sensors, NULL},
	{NULL, 0, NULL, NULL}
};

/*
 *  Storage unit specific entries (SCSI Periph, BS) with device names
 */
static i2o_proc_entry rbs_dev_entries[] = 
{
	{"dev_name", S_IFREG|S_IRUGO, i2o_proc_read_dev_name, NULL},
	{NULL, 0, NULL, NULL}
};

#define SCSI_TABLE_SIZE	13
static char *scsi_devices[] = 
{
	"Direct-Access Read/Write",
	"Sequential-Access Storage",
	"Printer",
	"Processor",
	"WORM Device",
	"CD-ROM Device",
	"Scanner Device",
	"Optical Memory Device",
	"Medium Changer Device",
	"Communications Device",
	"Graphics Art Pre-Press Device",
	"Graphics Art Pre-Press Device",
	"Array Controller Device"
};

/* private */

/*
 * Generic LAN specific entries
 * 
 * Should groups with r/w entries have their own subdirectory?
 *
 */
static i2o_proc_entry lan_entries[] = 
{
	{"lan_dev_info", S_IFREG|S_IRUGO, i2o_proc_read_lan_dev_info, NULL},
	{"lan_mac_addr", S_IFREG|S_IRUGO, i2o_proc_read_lan_mac_addr, NULL},
	{"lan_mcast_addr", S_IFREG|S_IRUGO|S_IWUSR,
	 i2o_proc_read_lan_mcast_addr, NULL},
	{"lan_batch_ctrl", S_IFREG|S_IRUGO|S_IWUSR,
	 i2o_proc_read_lan_batch_control, NULL},
	{"lan_operation", S_IFREG|S_IRUGO, i2o_proc_read_lan_operation, NULL},
	{"lan_media_operation", S_IFREG|S_IRUGO,
	 i2o_proc_read_lan_media_operation, NULL},
	{"lan_alt_addr", S_IFREG|S_IRUGO, i2o_proc_read_lan_alt_addr, NULL},
	{"lan_tx_info", S_IFREG|S_IRUGO, i2o_proc_read_lan_tx_info, NULL},
	{"lan_rx_info", S_IFREG|S_IRUGO, i2o_proc_read_lan_rx_info, NULL},

	{"lan_hist_stats", S_IFREG|S_IRUGO, i2o_proc_read_lan_hist_stats, NULL},
	{NULL, 0, NULL, NULL}
};

/*
 * Port specific LAN entries
 * 
 */
static i2o_proc_entry lan_eth_entries[] = 
{
	{"lan_eth_stats", S_IFREG|S_IRUGO, i2o_proc_read_lan_eth_stats, NULL},
	{NULL, 0, NULL, NULL}
};

static i2o_proc_entry lan_tr_entries[] = 
{
	{"lan_tr_stats", S_IFREG|S_IRUGO, i2o_proc_read_lan_tr_stats, NULL},
	{NULL, 0, NULL, NULL}
};

static i2o_proc_entry lan_fddi_entries[] = 
{
	{"lan_fddi_stats", S_IFREG|S_IRUGO, i2o_proc_read_lan_fddi_stats, NULL},
	{NULL, 0, NULL, NULL}
};


static char *chtostr(u8 *chars, int n)
{
	char tmp[256];
	tmp[0] = 0;
        return strncat(tmp, (char *)chars, n);
}

static int i2o_report_query_status(char *buf, int block_status, char *group)
{
	switch (block_status)
	{
	case -ETIMEDOUT:
		return sprintf(buf, "Timeout reading group %s.\n",group);
	case -ENOMEM:
		return sprintf(buf, "No free memory to read the table.\n");
	case -I2O_PARAMS_STATUS_INVALID_GROUP_ID:
		return sprintf(buf, "Group %s not supported.\n", group);
	default:
		return sprintf(buf, "Error reading group %s. BlockStatus 0x%02X\n",
			       group, -block_status);
	}
}

static char* bus_strings[] = 
{ 
	"Local Bus", 
	"ISA", 
	"EISA", 
	"MCA", 
	"PCI",
	"PCMCIA", 
	"NUBUS", 
	"CARDBUS"
};

static spinlock_t i2o_proc_lock = SPIN_LOCK_UNLOCKED;

int i2o_proc_read_hrt(char *buf, char **start, off_t offset, int count, 
		      int *eof, void *data)
{
	struct i2o_controller *c = (struct i2o_controller *)data;
	i2o_hrt *hrt = (i2o_hrt *)c->hrt;
	u32 bus;
	int len, i;

	spin_lock(&i2o_proc_lock);

	len = 0;

	if(hrt->hrt_version)
	{
		len += sprintf(buf+len, 
			       "HRT table for controller is too new a version.\n");
		spin_unlock(&i2o_proc_lock);
		return len;
	}

	if((hrt->num_entries * hrt->entry_len + 8) > 2048) {
		printk(KERN_WARNING "i2o_proc: HRT does not fit into buffer\n");
		len += sprintf(buf+len,
			       "HRT table too big to fit in buffer.\n");
		spin_unlock(&i2o_proc_lock);
		return len;
	}
	
	len += sprintf(buf+len, "HRT has %d entries of %d bytes each.\n",
		       hrt->num_entries, hrt->entry_len << 2);

	for(i = 0; i < hrt->num_entries && len < count; i++)
	{
		len += sprintf(buf+len, "Entry %d:\n", i);
		len += sprintf(buf+len, "   Adapter ID: %0#10x\n", 
					hrt->hrt_entry[i].adapter_id);
		len += sprintf(buf+len, "   Controlling tid: %0#6x\n",
					hrt->hrt_entry[i].parent_tid);

		if(hrt->hrt_entry[i].bus_type != 0x80)
		{
			bus = hrt->hrt_entry[i].bus_type;
			len += sprintf(buf+len, "   %s Information\n", bus_strings[bus]);

			switch(bus)
			{
				case I2O_BUS_LOCAL:
					len += sprintf(buf+len, "     IOBase: %0#6x,",
								hrt->hrt_entry[i].bus.local_bus.LbBaseIOPort);
					len += sprintf(buf+len, " MemoryBase: %0#10x\n",
								hrt->hrt_entry[i].bus.local_bus.LbBaseMemoryAddress);
					break;

				case I2O_BUS_ISA:
					len += sprintf(buf+len, "     IOBase: %0#6x,",
								hrt->hrt_entry[i].bus.isa_bus.IsaBaseIOPort);
					len += sprintf(buf+len, " MemoryBase: %0#10x,",
								hrt->hrt_entry[i].bus.isa_bus.IsaBaseMemoryAddress);
					len += sprintf(buf+len, " CSN: %0#4x,",
								hrt->hrt_entry[i].bus.isa_bus.CSN);
					break;

				case I2O_BUS_EISA:
					len += sprintf(buf+len, "     IOBase: %0#6x,",
								hrt->hrt_entry[i].bus.eisa_bus.EisaBaseIOPort);
					len += sprintf(buf+len, " MemoryBase: %0#10x,",
								hrt->hrt_entry[i].bus.eisa_bus.EisaBaseMemoryAddress);
					len += sprintf(buf+len, " Slot: %0#4x,",
								hrt->hrt_entry[i].bus.eisa_bus.EisaSlotNumber);
					break;
			 
				case I2O_BUS_MCA:
					len += sprintf(buf+len, "     IOBase: %0#6x,",
								hrt->hrt_entry[i].bus.mca_bus.McaBaseIOPort);
					len += sprintf(buf+len, " MemoryBase: %0#10x,",
								hrt->hrt_entry[i].bus.mca_bus.McaBaseMemoryAddress);
					len += sprintf(buf+len, " Slot: %0#4x,",
								hrt->hrt_entry[i].bus.mca_bus.McaSlotNumber);
					break;

				case I2O_BUS_PCI:
					len += sprintf(buf+len, "     Bus: %0#4x",
								hrt->hrt_entry[i].bus.pci_bus.PciBusNumber);
					len += sprintf(buf+len, " Dev: %0#4x",
								hrt->hrt_entry[i].bus.pci_bus.PciDeviceNumber);
					len += sprintf(buf+len, " Func: %0#4x",
								hrt->hrt_entry[i].bus.pci_bus.PciFunctionNumber);
					len += sprintf(buf+len, " Vendor: %0#6x",
								hrt->hrt_entry[i].bus.pci_bus.PciVendorID);
					len += sprintf(buf+len, " Device: %0#6x\n",
								hrt->hrt_entry[i].bus.pci_bus.PciDeviceID);
					break;

				default:
					len += sprintf(buf+len, "      Unsupported Bus Type\n");
			}
		}
		else
			len += sprintf(buf+len, "   Unknown Bus Type\n");
	}

	spin_unlock(&i2o_proc_lock);
	
	return len;
}

int i2o_proc_read_lct(char *buf, char **start, off_t offset, int len,
	int *eof, void *data)
{
	struct i2o_controller *c = (struct i2o_controller*)data;
	i2o_lct *lct = (i2o_lct *)c->lct;
	int entries;
	int i;

#define BUS_TABLE_SIZE 3
	static char *bus_ports[] =
	{
		"Generic Bus",
		"SCSI Bus",
		"Fibre Channel Bus"
	};

	spin_lock(&i2o_proc_lock);
	len = 0;

	entries = (lct->table_size - 3)/9;

	len += sprintf(buf, "LCT contains %d %s\n", entries,
						entries == 1 ? "entry" : "entries");
	if(lct->boot_tid)	
		len += sprintf(buf+len, "Boot Device @ ID %d\n", lct->boot_tid);

	len += 
		sprintf(buf+len, "Current Change Indicator: %#10x\n", lct->change_ind);

	for(i = 0; i < entries; i++)
	{
		len += sprintf(buf+len, "Entry %d\n", i);
		len += sprintf(buf+len, "  Class, SubClass  : %s", i2o_get_class_name(lct->lct_entry[i].class_id));
	
		/*
		 *	Classes which we'll print subclass info for
		 */
		switch(lct->lct_entry[i].class_id & 0xFFF)
		{
			case I2O_CLASS_RANDOM_BLOCK_STORAGE:
				switch(lct->lct_entry[i].sub_class)
				{
					case 0x00:
						len += sprintf(buf+len, ", Direct-Access Read/Write");
						break;

					case 0x04:
						len += sprintf(buf+len, ", WORM Drive");
						break;
	
					case 0x05:
						len += sprintf(buf+len, ", CD-ROM Drive");
						break;

					case 0x07:
						len += sprintf(buf+len, ", Optical Memory Device");
						break;

					default:
						len += sprintf(buf+len, ", Unknown (0x%02x)",
							       lct->lct_entry[i].sub_class);
						break;
				}
				break;

			case I2O_CLASS_LAN:
				switch(lct->lct_entry[i].sub_class & 0xFF)
				{
					case 0x30:
						len += sprintf(buf+len, ", Ethernet");
						break;