i2o_config.c

linux-2.6.15.6

/*
 * I2O Configuration Interface Driver
 *
 * (C) Copyright 1999-2002  Red Hat
 *
 * Written by Alan Cox, Building Number Three Ltd
 *
 * Fixes/additions:
 *	Deepak Saxena (04/20/1999):
 *		Added basic ioctl() support
 *	Deepak Saxena (06/07/1999):
 *		Added software download ioctl (still testing)
 *	Auvo H鋕kinen (09/10/1999):
 *		Changes to i2o_cfg_reply(), ioctl_parms()
 *		Added ioct_validate()
 *	Taneli V鋒鋕angas (09/30/1999):
 *		Fixed ioctl_swdl()
 *	Taneli V鋒鋕angas (10/04/1999):
 *		Changed ioctl_swdl(), implemented ioctl_swul() and ioctl_swdel()
 *	Deepak Saxena (11/18/1999):
 *		Added event managmenet support
 *	Alan Cox <[e-mail]>:
 *		2.4 rewrite ported to 2.5
 *	Markus Lidel <[e-mail]>:
 *		Added pass-thru support for Adaptec's raidutils
 *
 * 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/miscdevice.h>
#include <linux/smp_lock.h>
#include <linux/compat.h>

#include <asm/uaccess.h>

#include "core.h"

#define SG_TABLESIZE		30

static int i2o_cfg_ioctl(struct inode *inode, struct file *fp, unsigned int cmd,
			 unsigned long arg);

static spinlock_t i2o_config_lock;

#define MODINC(x,y) ((x) = ((x) + 1) % (y))

struct sg_simple_element {
	u32 flag_count;
	u32 addr_bus;
};

struct i2o_cfg_info {
	struct file *fp;
	struct fasync_struct *fasync;
	struct i2o_evt_info event_q[I2O_EVT_Q_LEN];
	u16 q_in;		// Queue head index
	u16 q_out;		// Queue tail index
	u16 q_len;		// Queue length
	u16 q_lost;		// Number of lost events
	ulong q_id;		// Event queue ID...used as tx_context
	struct i2o_cfg_info *next;
};
static struct i2o_cfg_info *open_files = NULL;
static ulong i2o_cfg_info_id = 0;

static int i2o_cfg_getiops(unsigned long arg)
{
	struct i2o_controller *c;
	u8 __user *user_iop_table = (void __user *)arg;
	u8 tmp[MAX_I2O_CONTROLLERS];
	int ret = 0;

	memset(tmp, 0, MAX_I2O_CONTROLLERS);

	list_for_each_entry(c, &i2o_controllers, list)
	    tmp[c->unit] = 1;

	if (copy_to_user(user_iop_table, tmp, MAX_I2O_CONTROLLERS))
		ret = -EFAULT;

	return ret;
};

static int i2o_cfg_gethrt(unsigned long arg)
{
	struct i2o_controller *c;
	struct i2o_cmd_hrtlct __user *cmd = (struct i2o_cmd_hrtlct __user *)arg;
	struct i2o_cmd_hrtlct kcmd;
	i2o_hrt *hrt;
	int len;
	u32 reslen;
	int ret = 0;

	if (copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_hrtlct)))
		return -EFAULT;

	if (get_user(reslen, kcmd.reslen) < 0)
		return -EFAULT;

	if (kcmd.resbuf == NULL)
		return -EFAULT;

	c = i2o_find_iop(kcmd.iop);
	if (!c)
		return -ENXIO;

	hrt = (i2o_hrt *) c->hrt.virt;

	len = 8 + ((hrt->entry_len * hrt->num_entries) << 2);

	/* We did a get user...so assuming mem is ok...is this bad? */
	put_user(len, kcmd.reslen);
	if (len > reslen)
		ret = -ENOBUFS;
	if (copy_to_user(kcmd.resbuf, (void *)hrt, len))
		ret = -EFAULT;

	return ret;
};

static int i2o_cfg_getlct(unsigned long arg)
{
	struct i2o_controller *c;
	struct i2o_cmd_hrtlct __user *cmd = (struct i2o_cmd_hrtlct __user *)arg;
	struct i2o_cmd_hrtlct kcmd;
	i2o_lct *lct;
	int len;
	int ret = 0;
	u32 reslen;

	if (copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_hrtlct)))
		return -EFAULT;

	if (get_user(reslen, kcmd.reslen) < 0)
		return -EFAULT;

	if (kcmd.resbuf == NULL)
		return -EFAULT;

	c = i2o_find_iop(kcmd.iop);
	if (!c)
		return -ENXIO;

	lct = (i2o_lct *) c->lct;

	len = (unsigned int)lct->table_size << 2;
	put_user(len, kcmd.reslen);
	if (len > reslen)
		ret = -ENOBUFS;
	else if (copy_to_user(kcmd.resbuf, lct, len))
		ret = -EFAULT;

	return ret;
};

static int i2o_cfg_parms(unsigned long arg, unsigned int type)
{
	int ret = 0;
	struct i2o_controller *c;
	struct i2o_device *dev;
	struct i2o_cmd_psetget __user *cmd =
	    (struct i2o_cmd_psetget __user *)arg;
	struct i2o_cmd_psetget kcmd;
	u32 reslen;
	u8 *ops;
	u8 *res;
	int len = 0;

	u32 i2o_cmd = (type == I2OPARMGET ?
		       I2O_CMD_UTIL_PARAMS_GET : I2O_CMD_UTIL_PARAMS_SET);

	if (copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_psetget)))
		return -EFAULT;

	if (get_user(reslen, kcmd.reslen))
		return -EFAULT;

	c = i2o_find_iop(kcmd.iop);
	if (!c)
		return -ENXIO;

	dev = i2o_iop_find_device(c, kcmd.tid);
	if (!dev)
		return -ENXIO;

	ops = (u8 *) kmalloc(kcmd.oplen, GFP_KERNEL);
	if (!ops)
		return -ENOMEM;

	if (copy_from_user(ops, kcmd.opbuf, kcmd.oplen)) {
		kfree(ops);
		return -EFAULT;
	}

	/*
	 * It's possible to have a _very_ large table
	 * and that the user asks for all of it at once...
	 */
	res = (u8 *) kmalloc(65536, GFP_KERNEL);
	if (!res) {
		kfree(ops);
		return -ENOMEM;
	}

	len = i2o_parm_issue(dev, i2o_cmd, ops, kcmd.oplen, res, 65536);
	kfree(ops);

	if (len < 0) {
		kfree(res);
		return -EAGAIN;
	}

	put_user(len, kcmd.reslen);
	if (len > reslen)
		ret = -ENOBUFS;
	else if (copy_to_user(kcmd.resbuf, res, len))
		ret = -EFAULT;

	kfree(res);

	return ret;
};

static int i2o_cfg_swdl(unsigned long arg)
{
	struct i2o_sw_xfer kxfer;
	struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
	unsigned char maxfrag = 0, curfrag = 1;
	struct i2o_dma buffer;
	struct i2o_message __iomem *msg;
	u32 m;
	unsigned int status = 0, swlen = 0, fragsize = 8192;
	struct i2o_controller *c;

	if (copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
		return -EFAULT;

	if (get_user(swlen, kxfer.swlen) < 0)
		return -EFAULT;

	if (get_user(maxfrag, kxfer.maxfrag) < 0)
		return -EFAULT;

	if (get_user(curfrag, kxfer.curfrag) < 0)
		return -EFAULT;

	if (curfrag == maxfrag)
		fragsize = swlen - (maxfrag - 1) * 8192;

	if (!kxfer.buf || !access_ok(VERIFY_READ, kxfer.buf, fragsize))
		return -EFAULT;

	c = i2o_find_iop(kxfer.iop);
	if (!c)
		return -ENXIO;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -EBUSY;

	if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize, GFP_KERNEL)) {
		i2o_msg_nop(c, m);
		return -ENOMEM;
	}

	__copy_from_user(buffer.virt, kxfer.buf, fragsize);

	writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_7, &msg->u.head[0]);
	writel(I2O_CMD_SW_DOWNLOAD << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);
	writel(i2o_config_driver.context, &msg->u.head[2]);
	writel(0, &msg->u.head[3]);
	writel((((u32) kxfer.flags) << 24) | (((u32) kxfer.sw_type) << 16) |
	       (((u32) maxfrag) << 8) | (((u32) curfrag)), &msg->body[0]);
	writel(swlen, &msg->body[1]);
	writel(kxfer.sw_id, &msg->body[2]);
	writel(0xD0000000 | fragsize, &msg->body[3]);
	writel(buffer.phys, &msg->body[4]);

	osm_debug("swdl frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
	status = i2o_msg_post_wait_mem(c, m, 60, &buffer);

	if (status != -ETIMEDOUT)
		i2o_dma_free(&c->pdev->dev, &buffer);

	if (status != I2O_POST_WAIT_OK) {
		// it fails if you try and send frags out of order
		// and for some yet unknown reasons too
		osm_info("swdl failed, DetailedStatus = %d\n", status);
		return status;
	}

	return 0;
};

static int i2o_cfg_swul(unsigned long arg)
{
	struct i2o_sw_xfer kxfer;
	struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
	unsigned char maxfrag = 0, curfrag = 1;
	struct i2o_dma buffer;
	struct i2o_message __iomem *msg;
	u32 m;
	unsigned int status = 0, swlen = 0, fragsize = 8192;
	struct i2o_controller *c;
	int ret = 0;

	if (copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
		goto return_fault;

	if (get_user(swlen, kxfer.swlen) < 0)
		goto return_fault;

	if (get_user(maxfrag, kxfer.maxfrag) < 0)
		goto return_fault;

	if (get_user(curfrag, kxfer.curfrag) < 0)
		goto return_fault;

	if (curfrag == maxfrag)
		fragsize = swlen - (maxfrag - 1) * 8192;

	if (!kxfer.buf)
		goto return_fault;

	c = i2o_find_iop(kxfer.iop);
	if (!c)
		return -ENXIO;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -EBUSY;

	if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize, GFP_KERNEL)) {
		i2o_msg_nop(c, m);
		return -ENOMEM;
	}

	writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_7, &msg->u.head[0]);
	writel(I2O_CMD_SW_UPLOAD << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);
	writel(i2o_config_driver.context, &msg->u.head[2]);
	writel(0, &msg->u.head[3]);
	writel((u32) kxfer.flags << 24 | (u32) kxfer.
	       sw_type << 16 | (u32) maxfrag << 8 | (u32) curfrag,
	       &msg->body[0]);
	writel(swlen, &msg->body[1]);
	writel(kxfer.sw_id, &msg->body[2]);
	writel(0xD0000000 | fragsize, &msg->body[3]);
	writel(buffer.phys, &msg->body[4]);

	osm_debug("swul frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
	status = i2o_msg_post_wait_mem(c, m, 60, &buffer);

	if (status != I2O_POST_WAIT_OK) {
		if (status != -ETIMEDOUT)
			i2o_dma_free(&c->pdev->dev, &buffer);

		osm_info("swul failed, DetailedStatus = %d\n", status);
		return status;
	}

	if (copy_to_user(kxfer.buf, buffer.virt, fragsize))
		ret = -EFAULT;

	i2o_dma_free(&c->pdev->dev, &buffer);

      return_ret:
	return ret;
      return_fault:
	ret = -EFAULT;
	goto return_ret;
};

static int i2o_cfg_swdel(unsigned long arg)
{
	struct i2o_controller *c;
	struct i2o_sw_xfer kxfer;
	struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
	struct i2o_message __iomem *msg;
	u32 m;
	unsigned int swlen;
	int token;

	if (copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
		return -EFAULT;

	if (get_user(swlen, kxfer.swlen) < 0)
		return -EFAULT;

	c = i2o_find_iop(kxfer.iop);
	if (!c)
		return -ENXIO;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -EBUSY;

	writel(SEVEN_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_SW_REMOVE << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);
	writel(i2o_config_driver.context, &msg->u.head[2]);
	writel(0, &msg->u.head[3]);
	writel((u32) kxfer.flags << 24 | (u32) kxfer.sw_type << 16,
	       &msg->body[0]);
	writel(swlen, &msg->body[1]);
	writel(kxfer.sw_id, &msg->body[2]);

	token = i2o_msg_post_wait(c, m, 10);

	if (token != I2O_POST_WAIT_OK) {
		osm_info("swdel failed, DetailedStatus = %d\n", token);
		return -ETIMEDOUT;
	}

	return 0;
};

static int i2o_cfg_validate(unsigned long arg)
{
	int token;
	int iop = (int)arg;
	struct i2o_message __iomem *msg;
	u32 m;
	struct i2o_controller *c;

	c = i2o_find_iop(iop);
	if (!c)
		return -ENXIO;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -EBUSY;

	writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_CONFIG_VALIDATE << 24 | HOST_TID << 12 | iop,
	       &msg->u.head[1]);
	writel(i2o_config_driver.context, &msg->u.head[2]);
	writel(0, &msg->u.head[3]);

	token = i2o_msg_post_wait(c, m, 10);

	if (token != I2O_POST_WAIT_OK) {
		osm_info("Can't validate configuration, ErrorStatus = %d\n",
			 token);
		return -ETIMEDOUT;
	}

	return 0;
};

static int i2o_cfg_evt_reg(unsigned long arg, struct file *fp)
{
	struct i2o_message __iomem *msg;
	u32 m;
	struct i2o_evt_id __user *pdesc = (struct i2o_evt_id __user *)arg;
	struct i2o_evt_id kdesc;
	struct i2o_controller *c;
	struct i2o_device *d;

	if (copy_from_user(&kdesc, pdesc, sizeof(struct i2o_evt_id)))
		return -EFAULT;

	/* IOP exists? */
	c = i2o_find_iop(kdesc.iop);
	if (!c)
		return -ENXIO;

	/* Device exists? */
	d = i2o_iop_find_device(c, kdesc.tid);
	if (!d)
		return -ENODEV;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -EBUSY;

	writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | kdesc.tid,
	       &msg->u.head[1]);
	writel(i2o_config_driver.context, &msg->u.head[2]);
	writel(i2o_cntxt_list_add(c, fp->private_data), &msg->u.head[3]);
	writel(kdesc.evt_mask, &msg->body[0]);

	i2o_msg_post(c, m);

	return 0;
}

static int i2o_cfg_evt_get(unsigned long arg, struct file *fp)
{
	struct i2o_cfg_info *p = NULL;
	struct i2o_evt_get __user *uget = (struct i2o_evt_get __user *)arg;
	struct i2o_evt_get kget;
	unsigned long flags;

	for (p = open_files; p; p = p->next)
		if (p->q_id == (ulong) fp->private_data)
			break;

	if (!p->q_len)
		return -ENOENT;

	memcpy(&kget.info, &p->event_q[p->q_out], sizeof(struct i2o_evt_info));
	MODINC(p->q_out, I2O_EVT_Q_LEN);
	spin_lock_irqsave(&i2o_config_lock, flags);
	p->q_len--;
	kget.pending = p->q_len;
	kget.lost = p->q_lost;
	spin_unlock_irqrestore(&i2o_config_lock, flags);

	if (copy_to_user(uget, &kget, sizeof(struct i2o_evt_get)))
		return -EFAULT;
	return 0;
}

#ifdef CONFIG_I2O_EXT_ADAPTEC
#ifdef CONFIG_COMPAT
static int i2o_cfg_passthru32(struct file *file, unsigned cmnd,
			      unsigned long arg)
{
	struct i2o_cmd_passthru32 __user *cmd;
	struct i2o_controller *c;
	u32 __user *user_msg;
	u32 *reply = NULL;
	u32 __user *user_reply = NULL;
	u32 size = 0;
	u32 reply_size = 0;
	u32 rcode = 0;
	struct i2o_dma sg_list[SG_TABLESIZE];
	u32 sg_offset = 0;
	u32 sg_count = 0;
	u32 i = 0;
	u32 sg_index = 0;
	i2o_status_block *sb;
	struct i2o_message *msg;
	u32 m;
	unsigned int iop;

	cmd = (struct i2o_cmd_passthru32 __user *)arg;

	if (get_user(iop, &cmd->iop) || get_user(i, &cmd->msg))
		return -EFAULT;

	user_msg = compat_ptr(i);

	c = i2o_find_iop(iop);
	if (!c) {
		osm_debug("controller %d not found\n", iop);
		return -ENXIO;
	}

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);

	sb = c->status_block.virt;

	if (get_user(size, &user_msg[0])) {
		osm_warn("unable to get size!\n");
		return -EFAULT;
	}
	size = size >> 16;

	if (size > sb->inbound_frame_size) {
		osm_warn("size of message > inbound_frame_size");
		return -EFAULT;
	}

	user_reply = &user_msg[size];

	size <<= 2;		// Convert to bytes

	/* Copy in the user's I2O command */
	if (copy_from_user(msg, user_msg, size)) {