/*
* 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 Häkkinen (09/10/1999):
* Changes to i2o_cfg_reply(), ioctl_parms()
* Added ioct_validate()
* Taneli Vähäkangas (09/30/1999):
* Fixed ioctl_swdl()
* Taneli Vähäkangas (10/04/1999):
* Changed ioctl_swdl(), implemented ioctl_swul() and ioctl_swdel()
* Deepak Saxena (11/18/1999):
* Added event managmenet support
* Alan Cox <alan@lxorguk.ukuu.org.uk>:
* 2.4 rewrite ported to 2.5
* Markus Lidel <Markus.Lidel@shadowconnect.com>:
* 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/mutex.h>
#include <linux/compat.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include "core.h"
#define SG_TABLESIZE 30
static DEFINE_MUTEX(i2o_cfg_mutex);
static long i2o_cfg_ioctl(struct file *, unsigned int, unsigned long);
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);
if (put_user(len, kcmd.reslen))
ret = -EFAULT;
else if (len > reslen)
ret = -ENOBUFS;
else 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;
if (put_user(len, kcmd.reslen))
ret = -EFAULT;
else 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;
/*
* Stop users being able to try and allocate arbitrary amounts
* of DMA space. 64K is way more than sufficient for this.
*/
if (kcmd.oplen > 65536)
return -EMSGSIZE;
ops = memdup_user(kcmd.opbuf, kcmd.oplen);
if (IS_ERR(ops))
return PTR_ERR(ops);
/*
* It's possible to have a _very_ large table
* and that the user asks for all of it at once...
*/
res = 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;
}
if (put_user(len, kcmd.reslen))
ret = -EFAULT;
else 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 *msg;
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;
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize)) {
i2o_msg_nop(c, msg);
return -ENOMEM;
}
if (__copy_from_user(buffer.virt, kxfer.buf, fragsize)) {
i2o_msg_nop(c, msg);
i2o_dma_free(&c->pdev->dev, &buffer);
return -EFAULT;
}
msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_7);
msg->u.head[1] =
cpu_to_le32(I2O_CMD_SW_DOWNLOAD << 24 | HOST_TID << 12 |
ADAPTER_TID);
msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
msg->u.head[3] = cpu_to_le32(0);
msg->body[0] =
cpu_to_le32((((u32) kxfer.flags) << 24) | (((u32) kxfer.
sw_type) << 16) |
(((u32) maxfrag) << 8) | (((u32) curfrag)));
msg->body[1] = cpu_to_le32(swlen);
msg->body[2] = cpu_to_le32(kxfer.sw_id);
msg->body[3] = cpu_to_le32(0xD0000000 | fragsize);
msg->body[4] = cpu_to_le32(buffer.phys);
osm_debug("swdl frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
status = i2o_msg_post_wait_mem(c, msg, 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 *msg;
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)))
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)
return -EFAULT;
c = i2o_find_iop(kxfer.iop);
if (!c)
return -ENXIO;
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize)) {
i2o_msg_nop(c, msg);
return -ENOMEM;
}
msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_7);
msg->u.head[1] =
cpu_to_le32(I2O_CMD_SW_UPLOAD << 24 | HOST_TID << 12 | ADAPTER_TID);
msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
msg->u.head[3] = cpu_to_le32(0);
msg->body[0] =
cpu_to_le32((u32) kxfer.flags << 24 | (u32) kxfer.
sw_type << 16 | (u32) maxfrag << 8 | (u32) curfrag);
msg->body[1] = cpu_to_le32(swlen);
msg->body[2] = cpu_to_le32(kxfer.sw_id);
msg->body[3] = cpu_to_le32(0xD0000000 | fragsize);
msg->body[4] = cpu_to_le32(buffer.phys);
osm_debug("swul frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
status = i2o_msg_post_wait_mem(c, msg, 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;
}
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 *msg;
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;
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
msg->u.head[0] = cpu_to_le32(SEVEN_WORD_MSG_SIZE | SGL_OFFSET_0);
msg->u.head[1] =
cpu_to_le32(I2O_CMD_SW_REMOVE << 24 | HOST_TID << 12 | ADAPTER_TID);
msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
msg->u.head[3] = cpu_to_le32(0);
msg->body[0] =
cpu_to_le32((u32) kxfer.flags << 24 | (u32) kxfer.sw_type << 16);
msg->body[1] = cpu_to_le32(swlen);
msg->body[2] = cpu_to_le32(kxfer.sw_id);
token = i2o_msg_post_wait(c, msg, 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 *msg;
struct i2o_controller *c;
c = i2o_find_iop(iop);
if (!c)
return -ENXIO;
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
msg->u.head[1] =
cpu_to_le32(I2O_CMD_CONFIG_VALIDATE << 24 | HOST_TID << 12 | iop);
msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
msg->u.head[3] = cpu_to_le32(0);
token = i2o_msg_post_wait(c, msg, 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 *msg;
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;
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
msg->u.head[1] =
cpu_to_le32(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 |
kdesc.tid);
msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
msg->u.head[3] = cpu_to_le32(i2o_cntxt_list_add(c, fp->private_data));
msg->body[0] = cpu_to_le32(kdesc.evt_mask);
i2o_msg_post(c, msg);
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_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;
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;
}
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
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
rcode = -EFAULT;
/* Copy in the user's I2O command */
if (copy_from_user(msg, user_msg, size)) {
osm_warn("unable to copy user message\n");
goto out;
}
i2o_dump_message(msg);
if (get_user(reply_size, &user_reply[0]) < 0)
goto out;
reply_size >>= 16;
reply_size <<= 2;
rcode = -ENOMEM;
reply = kzalloc(reply_size, GFP_KERNEL);
if (!reply) {
printk(KERN_WARNING "%s: Could not allocate reply buffer\n",
c->name);
goto out;
}
sg_offset = (msg->u.head[0] >> 4) & 0x0f;
memset(sg_list, 0, sizeof(sg_list[0]) * SG_TABLESIZE);
if (sg_offset) {
struct sg_simple_element *sg;
if (sg_offset * 4 >= size) {
rcode = -EFAULT;
goto cleanup;
}
// TODO 64bit fix
sg = (struct sg_simple_element *)((&msg->u.head[0]) +
sg_offset);
sg_count =
(size - sg_offset * 4) / sizeof(struct sg_simple_element);
if (sg_count > SG_TABLESIZE) {
printk(KERN_DEBUG "%s:IOCTL SG List too large (%u)\n",
c->name, sg_count);
rcode = -EINVAL;
goto cleanup;
}
for (i = 0; i < sg_count; i++) {
int sg_size;
struct i2o_dma *p;
if (!(sg[i].flag_count & 0x10000000
/*I2O_SGL_FLAGS_SIMPLE_ADDRESS_ELEMENT */ )) {
printk(KERN_DEBUG
"%s:Bad SG element %d - not simple (%x)\n",
c->name, i, sg[i].flag_count);
rcode = -EINVAL;
goto cleanup;
}
sg_size = sg[i].flag_count & 0xffffff;
p = &(sg_list[sg_index]);
/* Allocate memory for the transfer */
if (i2o_dma_alloc(&c->pdev->dev, p, sg_size)) {
printk(KERN_DEBUG
"%s: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
c->name, sg_size, i, sg_count);
rcode = -ENOMEM;
goto sg_list_cleanup;
}
sg_index++;
/* Copy in the user's SG buffer if necessary */
if (sg[i].
flag_count & 0x04000000 /*I2O_SGL_FLAGS_DIR */ ) {
// TODO 64bit fix
if (copy_from_user
(p->virt,
(void __user *)(unsigned long)sg[i].
addr_bus, sg_size)) {
printk(KERN_DEBUG
"%s: Could not copy SG buf %d FROM user\n",
c->name, i);
rcode = -EFAULT;
goto sg_list_cleanup;
}
}
//TODO 64bit fix
sg[i].addr_bus = (u32) p->phys;
}
}
rcode = i2o_msg_post_wait(c, msg, 60);
msg = NULL;
if (rcode) {
reply[4] = ((u32) rcode) << 24;
goto sg_list_cleanup;
}
if (sg_offset) {
u32 rmsg[I2O_OUTBOUND_MSG_FRAME_SIZE];
/* Copy back the Scatter Gather buffers back to user space */
u32 j;
// TODO 64bit fix
struct sg_simple_element *sg;
int sg_size;
// re-acquire the original message to handle correctly the sg copy operation
memset(&rmsg, 0, I2O_OUTBOUND_MSG_FRAME_SIZE * 4);
// get user msg size in u32s
if (get_user(size, &user_msg[0])) {
rcode = -EFAULT;
goto sg_list_cleanup;
}
size = size >> 16;
size *= 4;
if (size > sizeof(rmsg)) {
rcode = -EINVAL;
goto sg_list_cleanup;
}
/* Copy in the user's I2O command */
if (copy_from_user(rmsg, user_msg, size)) {
rcode = -EFAULT;
goto sg_list_cleanup;
}
sg_count =
(size - sg_offset * 4) / sizeof(struct sg_simple_element);
// TODO 64bit fix
sg = (struct sg_simple_element *)(rmsg + sg_offset);
for (j = 0; j < sg_count; j++) {
/* Copy out the SG list to user's buffer if necessary */
if (!
(sg[j].
flag_count & 0x4000000 /*I2O_SGL_FLAGS_DIR */ )) {
sg_size = sg[j].flag_count & 0xffffff;
// TODO 64bit fix
if (copy_to_user
((void __user *)(u64) sg[j].addr_bus,
sg_list[j].virt, sg_size)) {
printk(KERN_WARNING
"%s: Could not copy %p TO user %x\n",
c->name, sg_list[j].virt,
sg[j].addr_bus);
rcode = -EFAULT;
goto sg_list_cleanup;
}
}
}
}
sg_list_cleanup:
/* Copy back the reply to user space */
if (reply_size) {
// we wrote our own values for context - now restore the user supplied ones
if (copy_from_user(reply + 2, user_msg + 2, sizeof(u32) * 2)) {
printk(KERN_WARNING
"%s: Could not copy message context FROM user\n",
c->name);
rcode = -EFAULT;
}
if (copy_to_user(user_reply, reply, reply_size)) {
printk(KERN_WARNING
"%s: Could not copy reply TO user\n", c->name);
rcode = -EFAULT;
}
}
for (i = 0; i < sg_index; i++)
i2o_dma_free(&c->pdev->dev, &sg_list[i]);
cleanup:
kfree(reply);
out:
if (msg)
i2o_msg_nop(c, msg);
return rcode;
}
static long i2o_cfg_compat_ioctl(struct file *file, unsigned cmd,
unsigned long arg)
{
int ret;
switch (cmd) {
case I2OGETIOPS:
ret = i2o_cfg_ioctl(file, cmd, arg);
break;
case I2OPASSTHRU32:
mutex_lock(&i2o_cfg_mutex);
ret = i2o_cfg_passthru32(file, cmd, arg);
mutex_unlock(&i2o_cfg_mutex);
break;
default:
ret = -ENOIOCTLCMD;
break;
}
return ret;
}
#endif
#ifdef CONFIG_I2O_EXT_ADAPTEC
static int i2o_cfg_passthru(unsigned long arg)
{
struct i2o_cmd_passthru __user *cmd =
(struct i2o_cmd_passthru __user *)arg;
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;
int sg_index = 0;
u32 i = 0;
i2o_status_block *sb;
struct i2o_message *msg;
unsigned int iop;
if (get_user(iop, &cmd->iop) || get_user(user_msg, &cmd->msg))
return -EFAULT;
c = i2o_find_iop(iop);
if (!c) {
osm_warn("controller %d not found\n", iop);
return -ENXIO;
}
sb = c->status_block.virt;
if (get_user(size, &user_msg[0]))
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
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
rcode = -EFAULT;
/* Copy in the user's I2O command */
if (copy_from_user(msg, user_msg, size))
goto out;
if (get_user(reply_size, &user_reply[0]) < 0)
goto out;
reply_size >>= 16;
reply_size <<= 2;
reply = kzalloc(reply_size, GFP_KERNEL);
if (!reply) {
printk(KERN_WARNING "%s: Could not allocate reply buffer\n",
c->name);
rcode = -ENOMEM;
goto out;
}
sg_offset = (msg->u.head[0] >> 4) & 0x0f;
memset(sg_list, 0, sizeof(sg_list[0]) * SG_TABLESIZE);
if (sg_offset) {
struct sg_simple_element *sg;
struct i2o_dma *p;
if (sg_offset * 4 >= size) {
rcode = -EFAULT;
goto cleanup;
}
// TODO 64bit fix
sg = (struct sg_simple_element *)((&msg->u.head[0]) +
sg_offset);
sg_count =
(size - sg_offset * 4) / sizeof(struct sg_simple_element);
if (sg_count > SG_TABLESIZE) {
printk(KERN_DEBUG "%s:IOCTL SG List too large (%u)\n",
c->name, sg_count);
rcode = -EINVAL;
goto cleanup;
}
for (i = 0; i < sg_count; i++) {
int sg_size;
if (!(sg[i].flag_count & 0x10000000
/*I2O_SGL_FLAGS_SIMPLE_ADDRESS_ELEMENT */ )) {
printk(KERN_DEBUG
"%s:Bad SG element %d - not simple (%x)\n",
c->name, i, sg[i].flag_count);
rcode = -EINVAL;
goto sg_list_cleanup;
}
sg_size = sg[i].flag_count & 0xffffff;
p = &(sg_list[sg_index]);
if (i2o_dma_alloc(&c->pdev->dev, p, sg_size)) {
/* Allocate memory for the transfer */
printk(KERN_DEBUG
"%s: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
c->name, sg_size, i, sg_count);
rcode = -ENOMEM;
goto sg_list_cleanup;
}
sg_index++;
/* Copy in the user's SG buffer if necessary */
if (sg[i].
flag_count & 0x04000000 /*I2O_SGL_FLAGS_DIR */ ) {
// TODO 64bit fix
if (copy_from_user
(p->virt, (void __user *)sg[i].addr_bus,
sg_size)) {
printk(KERN_DEBUG
"%s: Could not copy SG buf %d FROM user\n",
c->name, i);
rcode = -EFAULT;
goto sg_list_cleanup;
}
}
sg[i].addr_bus = p->phys;
}
}
rcode = i2o_msg_post_wait(c, msg, 60);
msg = NULL;
if (rcode) {
reply[4] = ((u32) rcode) << 24;
goto sg_list_cleanup;
}
if (sg_offset) {
u32 rmsg[I2O_OUTBOUND_MSG_FRAME_SIZE];
/* Copy back the Scatter Gather buffers back to user space */
u32 j;
// TODO 64bit fix
struct sg_simple_element *sg;
int sg_size;
// re-acquire the original message to handle correctly the sg copy operation
memset(&rmsg, 0, I2O_OUTBOUND_MSG_FRAME_SIZE * 4);
// get user msg size in u32s
if (get_user(size, &user_msg[0])) {
rcode = -EFAULT;
goto sg_list_cleanup;
}
size = size >> 16;
size *= 4;
if (size > sizeof(rmsg)) {
rcode = -EFAULT;
goto sg_list_cleanup;
}
/* Copy in the user's I2O command */
if (copy_from_user(rmsg, user_msg, size)) {
rcode = -EFAULT;
goto sg_list_cleanup;
}
sg_count =
(size - sg_offset * 4) / sizeof(struct sg_simple_element);
// TODO 64bit fix
sg = (struct sg_simple_element *)(rmsg + sg_offset);
for (j = 0; j < sg_count; j++) {
/* Copy out the SG list to user's buffer if necessary */
if (!
(sg[j].
flag_count & 0x4000000 /*I2O_SGL_FLAGS_DIR */ )) {
sg_size = sg[j].flag_count & 0xffffff;
// TODO 64bit fix
if (copy_to_user
((void __user *)sg[j].addr_bus, sg_list[j].virt,
sg_size)) {
printk(KERN_WARNING
"%s: Could not copy %p TO user %x\n",
c->name, sg_list[j].virt,
sg[j].addr_bus);
rcode = -EFAULT;
goto sg_list_cleanup;
}
}
}
}
sg_list_cleanup:
/* Copy back the reply to user space */
if (reply_size) {
// we wrote our own values for context - now restore the user supplied ones
if (copy_from_user(reply + 2, user_msg + 2, sizeof(u32) * 2)) {
printk(KERN_WARNING
"%s: Could not copy message context FROM user\n",
c->name);
rcode = -EFAULT;
}
if (copy_to_user(user_reply, reply, reply_size)) {
printk(KERN_WARNING
"%s: Could not copy reply TO user\n", c->name);
rcode = -EFAULT;
}
}
for (i = 0; i < sg_index; i++)
i2o_dma_free(&c->pdev->dev, &sg_list[i]);
cleanup:
kfree(reply);
out:
if (msg)
i2o_msg_nop(c, msg);
return rcode;
}
#endif
/*
* IOCTL Handler
*/
static long i2o_cfg_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
{
int ret;
mutex_lock(&i2o_cfg_mutex);
switch (cmd) {
case I2OGETIOPS:
ret = i2o_cfg_getiops(arg);
break;
case I2OHRTGET:
ret = i2o_cfg_gethrt(arg);
break;
case I2OLCTGET:
ret = i2o_cfg_getlct(arg);
break;
case I2OPARMSET:
ret = i2o_cfg_parms(arg, I2OPARMSET);
break;
case I2OPARMGET:
ret = i2o_cfg_parms(arg, I2OPARMGET);
break;
case I2OSWDL:
ret = i2o_cfg_swdl(arg);
break;
case I2OSWUL:
ret = i2o_cfg_swul(arg);
break;
case I2OSWDEL:
ret = i2o_cfg_swdel(arg);
break;
case I2OVALIDATE:
ret = i2o_cfg_validate(arg);
break;
case I2OEVTREG:
ret = i2o_cfg_evt_reg(arg, fp);
break;
case I2OEVTGET:
ret = i2o_cfg_evt_get(arg, fp);
break;
#ifdef CONFIG_I2O_EXT_ADAPTEC
case I2OPASSTHRU:
ret = i2o_cfg_passthru(arg);
break;
#endif
default:
osm_debug("unknown ioctl called!\n");
ret = -EINVAL;
}
mutex_unlock(&i2o_cfg_mutex);
return ret;
}
static int cfg_open(struct inode *inode, struct file *file)
{
struct i2o_cfg_info *tmp = kmalloc(sizeof(struct i2o_cfg_info),
GFP_KERNEL);
unsigned long flags;
if (!tmp)
return -ENOMEM;
mutex_lock(&i2o_cfg_mutex);
file->private_data = (void *)(i2o_cfg_info_id++);
tmp->fp = file;
tmp->fasync = NULL;
tmp->q_id = (ulong) file->private_data;
tmp->q_len = 0;
tmp->q_in = 0;
tmp->q_out = 0;
tmp->q_lost = 0;
tmp->next = open_files;
spin_lock_irqsave(&i2o_config_lock, flags);
open_files = tmp;
spin_unlock_irqrestore(&i2o_config_lock, flags);
mutex_unlock(&i2o_cfg_mutex);
return 0;
}
static int cfg_fasync(int fd, struct file *fp, int on)
{
ulong id = (ulong) fp->private_data;
struct i2o_cfg_info *p;
int ret = -EBADF;
mutex_lock(&i2o_cfg_mutex);
for (p = open_files; p; p = p->next)
if (p->q_id == id)
break;
if (p)
ret = fasync_helper(fd, fp, on, &p->fasync);
mutex_unlock(&i2o_cfg_mutex);
return ret;
}
static int cfg_release(struct inode *inode, struct file *file)
{
ulong id = (ulong) file->private_data;
struct i2o_cfg_info *p, **q;
unsigned long flags;
mutex_lock(&i2o_cfg_mutex);
spin_lock_irqsave(&i2o_config_lock, flags);
for (q = &open_files; (p = *q) != NULL; q = &p->next) {
if (p->q_id == id) {
*q = p->next;
kfree(p);
break;
}
}
spin_unlock_irqrestore(&i2o_config_lock, flags);
mutex_unlock(&i2o_cfg_mutex);
return 0;
}
static const struct file_operations config_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.unlocked_ioctl = i2o_cfg_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = i2o_cfg_compat_ioctl,
#endif
.open = cfg_open,
.release = cfg_release,
.fasync = cfg_fasync,
};
static struct miscdevice i2o_miscdev = {
I2O_MINOR,
"i2octl",
&config_fops
};
static int __init i2o_config_old_init(void)
{
spin_lock_init(&i2o_config_lock);
if (misc_register(&i2o_miscdev) < 0) {
osm_err("can't register device.\n");
return -EBUSY;
}
return 0;
}
static void i2o_config_old_exit(void)
{
misc_deregister(&i2o_miscdev);
}
MODULE_AUTHOR("Red Hat Software");