i2o_config.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:21k
- /*
- * I2O Configuration Interface Driver
- *
- * (C) Copyright 1999 Red Hat Software
- *
- * Written by Alan Cox, Building Number Three Ltd
- *
- * Modified 04/20/1999 by Deepak Saxena
- * - Added basic ioctl() support
- * Modified 06/07/1999 by Deepak Saxena
- * - Added software download ioctl (still testing)
- * Modified 09/10/1999 by Auvo H鋕kinen
- * - Changes to i2o_cfg_reply(), ioctl_parms()
- * - Added ioct_validate()
- * Modified 09/30/1999 by Taneli V鋒鋕angas
- * - Fixed ioctl_swdl()
- * Modified 10/04/1999 by Taneli V鋒鋕angas
- * - Changed ioctl_swdl(), implemented ioctl_swul() and ioctl_swdel()
- * Modified 11/18/199 by Deepak Saxena
- * - Added event managmenet support
- *
- * 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/module.h>
- #include <linux/kernel.h>
- #include <linux/pci.h>
- #include <linux/i2o.h>
- #include <linux/errno.h>
- #include <linux/init.h>
- #include <linux/slab.h>
- #include <linux/miscdevice.h>
- #include <linux/mm.h>
- #include <linux/spinlock.h>
- #include <linux/smp_lock.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- static int i2o_cfg_context = -1;
- static void *page_buf;
- static spinlock_t i2o_config_lock = SPIN_LOCK_UNLOCKED;
- struct wait_queue *i2o_wait_queue;
- #define MODINC(x,y) ((x) = ((x) + 1) % (y))
- 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
- u32 q_id; // Event queue ID...used as tx_context
- struct i2o_cfg_info *next;
- };
- static struct i2o_cfg_info *open_files = NULL;
- static int i2o_cfg_info_id = 0;
- static int ioctl_getiops(unsigned long);
- static int ioctl_gethrt(unsigned long);
- static int ioctl_getlct(unsigned long);
- static int ioctl_parms(unsigned long, unsigned int);
- static int ioctl_html(unsigned long);
- static int ioctl_swdl(unsigned long);
- static int ioctl_swul(unsigned long);
- static int ioctl_swdel(unsigned long);
- static int ioctl_validate(unsigned long);
- static int ioctl_evt_reg(unsigned long, struct file *);
- static int ioctl_evt_get(unsigned long, struct file *);
- static int cfg_fasync(int, struct file*, int);
- /*
- * This is the callback for any message we have posted. The message itself
- * will be returned to the message pool when we return from the IRQ
- *
- * This runs in irq context so be short and sweet.
- */
- static void i2o_cfg_reply(struct i2o_handler *h, struct i2o_controller *c, struct i2o_message *m)
- {
- u32 *msg = (u32 *)m;
- if (msg[0] & MSG_FAIL) {
- u32 *preserved_msg = (u32*)(c->mem_offset + msg[7]);
- printk(KERN_ERR "i2o_config: IOP failed to process the msg.n");
- /* Release the preserved msg frame by resubmitting it as a NOP */
- preserved_msg[0] = THREE_WORD_MSG_SIZE | SGL_OFFSET_0;
- preserved_msg[1] = I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | 0;
- preserved_msg[2] = 0;
- i2o_post_message(c, msg[7]);
- }
- if (msg[4] >> 24) // ReqStatus != SUCCESS
- i2o_report_status(KERN_INFO,"i2o_config", msg);
- if(m->function == I2O_CMD_UTIL_EVT_REGISTER)
- {
- struct i2o_cfg_info *inf;
- for(inf = open_files; inf; inf = inf->next)
- if(inf->q_id == msg[3])
- break;
- //
- // If this is the case, it means that we're getting
- // events for a file descriptor that's been close()'d
- // w/o the user unregistering for events first.
- // The code currently assumes that the user will
- // take care of unregistering for events before closing
- // a file.
- //
- // TODO:
- // Should we track event registartion and deregister
- // for events when a file is close()'d so this doesn't
- // happen? That would get rid of the search through
- // the linked list since file->private_data could point
- // directly to the i2o_config_info data structure...but
- // it would mean having all sorts of tables to track
- // what each file is registered for...I think the
- // current method is simpler. - DS
- //
- if(!inf)
- return;
- inf->event_q[inf->q_in].id.iop = c->unit;
- inf->event_q[inf->q_in].id.tid = m->target_tid;
- inf->event_q[inf->q_in].id.evt_mask = msg[4];
- //
- // Data size = msg size - reply header
- //
- inf->event_q[inf->q_in].data_size = (m->size - 5) * 4;
- if(inf->event_q[inf->q_in].data_size)
- memcpy(inf->event_q[inf->q_in].evt_data,
- (unsigned char *)(msg + 5),
- inf->event_q[inf->q_in].data_size);
- spin_lock(&i2o_config_lock);
- MODINC(inf->q_in, I2O_EVT_Q_LEN);
- if(inf->q_len == I2O_EVT_Q_LEN)
- {
- MODINC(inf->q_out, I2O_EVT_Q_LEN);
- inf->q_lost++;
- }
- else
- {
- // Keep I2OEVTGET on another CPU from touching this
- inf->q_len++;
- }
- spin_unlock(&i2o_config_lock);
-
- // printk(KERN_INFO "File %p w/id %d has %d eventsn",
- // inf->fp, inf->q_id, inf->q_len);
- kill_fasync(&inf->fasync, SIGIO, POLL_IN);
- }
- return;
- }
- /*
- * Each of these describes an i2o message handler. They are
- * multiplexed by the i2o_core code
- */
-
- struct i2o_handler cfg_handler=
- {
- i2o_cfg_reply,
- NULL,
- NULL,
- NULL,
- "Configuration",
- 0,
- 0xffffffff // All classes
- };
- static ssize_t cfg_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
- {
- printk(KERN_INFO "i2o_config write not yet supportedn");
- return 0;
- }
- static ssize_t cfg_read(struct file *file, char *buf, size_t count, loff_t *ptr)
- {
- return 0;
- }
- /*
- * IOCTL Handler
- */
- static int cfg_ioctl(struct inode *inode, struct file *fp, unsigned int cmd,
- unsigned long arg)
- {
- int ret;
- switch(cmd)
- {
- case I2OGETIOPS:
- ret = ioctl_getiops(arg);
- break;
- case I2OHRTGET:
- ret = ioctl_gethrt(arg);
- break;
- case I2OLCTGET:
- ret = ioctl_getlct(arg);
- break;
- case I2OPARMSET:
- ret = ioctl_parms(arg, I2OPARMSET);
- break;
- case I2OPARMGET:
- ret = ioctl_parms(arg, I2OPARMGET);
- break;
- case I2OSWDL:
- ret = ioctl_swdl(arg);
- break;
- case I2OSWUL:
- ret = ioctl_swul(arg);
- break;
- case I2OSWDEL:
- ret = ioctl_swdel(arg);
- break;
- case I2OVALIDATE:
- ret = ioctl_validate(arg);
- break;
-
- case I2OHTML:
- ret = ioctl_html(arg);
- break;
- case I2OEVTREG:
- ret = ioctl_evt_reg(arg, fp);
- break;
- case I2OEVTGET:
- ret = ioctl_evt_get(arg, fp);
- break;
- default:
- ret = -EINVAL;
- }
- return ret;
- }
- int ioctl_getiops(unsigned long arg)
- {
- u8 *user_iop_table = (u8*)arg;
- struct i2o_controller *c = NULL;
- int i;
- u8 foo[MAX_I2O_CONTROLLERS];
- if(!access_ok(VERIFY_WRITE, user_iop_table, MAX_I2O_CONTROLLERS))
- return -EFAULT;
- for(i = 0; i < MAX_I2O_CONTROLLERS; i++)
- {
- c = i2o_find_controller(i);
- if(c)
- {
- foo[i] = 1;
- i2o_unlock_controller(c);
- }
- else
- {
- foo[i] = 0;
- }
- }
- __copy_to_user(user_iop_table, foo, MAX_I2O_CONTROLLERS);
- return 0;
- }
- int ioctl_gethrt(unsigned long arg)
- {
- struct i2o_controller *c;
- struct i2o_cmd_hrtlct *cmd = (struct i2o_cmd_hrtlct*)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_controller(kcmd.iop);
- if(!c)
- return -ENXIO;
-
- hrt = (i2o_hrt *)c->hrt;
- i2o_unlock_controller(c);
- 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;
- }
- int ioctl_getlct(unsigned long arg)
- {
- struct i2o_controller *c;
- struct i2o_cmd_hrtlct *cmd = (struct i2o_cmd_hrtlct*)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_controller(kcmd.iop);
- if(!c)
- return -ENXIO;
- lct = (i2o_lct *)c->lct;
- i2o_unlock_controller(c);
- len = (unsigned int)lct->table_size << 2;
- put_user(len, kcmd.reslen);
- if(len > reslen)
- ret = -ENOBUFS;
- else if(copy_to_user(kcmd.resbuf, (void*)lct, len))
- ret = -EFAULT;
- return ret;
- }
- static int ioctl_parms(unsigned long arg, unsigned int type)
- {
- int ret = 0;
- struct i2o_controller *c;
- struct i2o_cmd_psetget *cmd = (struct i2o_cmd_psetget*)arg;
- struct i2o_cmd_psetget kcmd;
- u32 reslen;
- u8 *ops;
- u8 *res;
- int len;
- 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_controller(kcmd.iop);
- if(!c)
- return -ENXIO;
- ops = (u8*)kmalloc(kcmd.oplen, GFP_KERNEL);
- if(!ops)
- {
- i2o_unlock_controller(c);
- return -ENOMEM;
- }
- if(copy_from_user(ops, kcmd.opbuf, kcmd.oplen))
- {
- i2o_unlock_controller(c);
- 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)
- {
- i2o_unlock_controller(c);
- kfree(ops);
- return -ENOMEM;
- }
- len = i2o_issue_params(i2o_cmd, c, kcmd.tid,
- ops, kcmd.oplen, res, 65536);
- i2o_unlock_controller(c);
- kfree(ops);
-
- if (len < 0) {
- kfree(res);
- return -EAGAIN;
- }
- put_user(len, kcmd.reslen);
- if(len > reslen)
- ret = -ENOBUFS;
- else if(copy_to_user(cmd->resbuf, res, len))
- ret = -EFAULT;
- kfree(res);
- return ret;
- }
- int ioctl_html(unsigned long arg)
- {
- struct i2o_html *cmd = (struct i2o_html*)arg;
- struct i2o_html kcmd;
- struct i2o_controller *c;
- u8 *res = NULL;
- void *query = NULL;
- int ret = 0;
- int token;
- u32 len;
- u32 reslen;
- u32 msg[MSG_FRAME_SIZE/4];
- if(copy_from_user(&kcmd, cmd, sizeof(struct i2o_html)))
- {
- printk(KERN_INFO "i2o_config: can't copy html cmdn");
- return -EFAULT;
- }
- if(get_user(reslen, kcmd.reslen) < 0)
- {
- printk(KERN_INFO "i2o_config: can't copy html reslenn");
- return -EFAULT;
- }
- if(!kcmd.resbuf)
- {
- printk(KERN_INFO "i2o_config: NULL html buffern");
- return -EFAULT;
- }
- c = i2o_find_controller(kcmd.iop);
- if(!c)
- return -ENXIO;
- if(kcmd.qlen) /* Check for post data */
- {
- query = kmalloc(kcmd.qlen, GFP_KERNEL);
- if(!query)
- {
- i2o_unlock_controller(c);
- return -ENOMEM;
- }
- if(copy_from_user(query, kcmd.qbuf, kcmd.qlen))
- {
- i2o_unlock_controller(c);
- printk(KERN_INFO "i2o_config: could not get queryn");
- kfree(query);
- return -EFAULT;
- }
- }
- res = kmalloc(65536, GFP_KERNEL);
- if(!res)
- {
- i2o_unlock_controller(c);
- kfree(query);
- return -ENOMEM;
- }
- msg[1] = (I2O_CMD_UTIL_CONFIG_DIALOG << 24)|HOST_TID<<12|kcmd.tid;
- msg[2] = i2o_cfg_context;
- msg[3] = 0;
- msg[4] = kcmd.page;
- msg[5] = 0xD0000000|65536;
- msg[6] = virt_to_bus(res);
- if(!kcmd.qlen) /* Check for post data */
- msg[0] = SEVEN_WORD_MSG_SIZE|SGL_OFFSET_5;
- else
- {
- msg[0] = NINE_WORD_MSG_SIZE|SGL_OFFSET_5;
- msg[5] = 0x50000000|65536;
- msg[7] = 0xD4000000|(kcmd.qlen);
- msg[8] = virt_to_bus(query);
- }
- /*
- Wait for a considerable time till the Controller
- does its job before timing out. The controller might
- take more time to process this request if there are
- many devices connected to it.
- */
- token = i2o_post_wait_mem(c, msg, 9*4, 400, query, res);
- if(token < 0)
- {
- printk(KERN_DEBUG "token = %#10xn", token);
- i2o_unlock_controller(c);
-
- if(token != -ETIMEDOUT)
- {
- kfree(res);
- if(kcmd.qlen) kfree(query);
- }
- return token;
- }
- i2o_unlock_controller(c);
- len = strnlen(res, 65536);
- put_user(len, kcmd.reslen);
- if(len > reslen)
- ret = -ENOMEM;
- if(copy_to_user(kcmd.resbuf, res, len))
- ret = -EFAULT;
- kfree(res);
- if(kcmd.qlen)
- kfree(query);
- return ret;
- }
-
- int ioctl_swdl(unsigned long arg)
- {
- struct i2o_sw_xfer kxfer;
- struct i2o_sw_xfer *pxfer = (struct i2o_sw_xfer *)arg;
- unsigned char maxfrag = 0, curfrag = 1;
- unsigned char *buffer;
- u32 msg[9];
- 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_controller(kxfer.iop);
- if(!c)
- return -ENXIO;
- buffer=kmalloc(fragsize, GFP_KERNEL);
- if (buffer==NULL)
- {
- i2o_unlock_controller(c);
- return -ENOMEM;
- }
- __copy_from_user(buffer, kxfer.buf, fragsize);
- msg[0]= NINE_WORD_MSG_SIZE | SGL_OFFSET_7;
- msg[1]= I2O_CMD_SW_DOWNLOAD<<24 | HOST_TID<<12 | ADAPTER_TID;
- msg[2]= (u32)cfg_handler.context;
- msg[3]= 0;
- msg[4]= (((u32)kxfer.flags)<<24) | (((u32)kxfer.sw_type)<<16) |
- (((u32)maxfrag)<<8) | (((u32)curfrag));
- msg[5]= swlen;
- msg[6]= kxfer.sw_id;
- msg[7]= (0xD0000000 | fragsize);
- msg[8]= virt_to_bus(buffer);
- // printk("i2o_config: swdl frag %d/%d (size %d)n", curfrag, maxfrag, fragsize);
- status = i2o_post_wait_mem(c, msg, sizeof(msg), 60, buffer, NULL);
- i2o_unlock_controller(c);
- if(status != -ETIMEDOUT)
- kfree(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
- printk(KERN_INFO "i2o_config: swdl failed, DetailedStatus = %dn", status);
- return status;
- }
- return 0;
- }
- int ioctl_swul(unsigned long arg)
- {
- struct i2o_sw_xfer kxfer;
- struct i2o_sw_xfer *pxfer = (struct i2o_sw_xfer *)arg;
- unsigned char maxfrag = 0, curfrag = 1;
- unsigned char *buffer;
- u32 msg[9];
- 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_WRITE, kxfer.buf, fragsize))
- return -EFAULT;
-
- c = i2o_find_controller(kxfer.iop);
- if(!c)
- return -ENXIO;
-
- buffer=kmalloc(fragsize, GFP_KERNEL);
- if (buffer==NULL)
- {
- i2o_unlock_controller(c);
- return -ENOMEM;
- }
-
- msg[0]= NINE_WORD_MSG_SIZE | SGL_OFFSET_7;
- msg[1]= I2O_CMD_SW_UPLOAD<<24 | HOST_TID<<12 | ADAPTER_TID;
- msg[2]= (u32)cfg_handler.context;
- msg[3]= 0;
- msg[4]= (u32)kxfer.flags<<24|(u32)kxfer.sw_type<<16|(u32)maxfrag<<8|(u32)curfrag;
- msg[5]= swlen;
- msg[6]= kxfer.sw_id;
- msg[7]= (0xD0000000 | fragsize);
- msg[8]= virt_to_bus(buffer);
-
- // printk("i2o_config: swul frag %d/%d (size %d)n", curfrag, maxfrag, fragsize);
- status = i2o_post_wait_mem(c, msg, sizeof(msg), 60, buffer, NULL);
- i2o_unlock_controller(c);
-
- if (status != I2O_POST_WAIT_OK)
- {
- if(status != -ETIMEDOUT)
- kfree(buffer);
- printk(KERN_INFO "i2o_config: swul failed, DetailedStatus = %dn", status);
- return status;
- }
-
- __copy_to_user(kxfer.buf, buffer, fragsize);
- kfree(buffer);
-
- return 0;
- }
- int ioctl_swdel(unsigned long arg)
- {
- struct i2o_controller *c;
- struct i2o_sw_xfer kxfer, *pxfer = (struct i2o_sw_xfer *)arg;
- u32 msg[7];
- 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_controller(kxfer.iop);
- if (!c)
- return -ENXIO;
- msg[0] = SEVEN_WORD_MSG_SIZE | SGL_OFFSET_0;
- msg[1] = I2O_CMD_SW_REMOVE<<24 | HOST_TID<<12 | ADAPTER_TID;
- msg[2] = (u32)i2o_cfg_context;
- msg[3] = 0;
- msg[4] = (u32)kxfer.flags<<24 | (u32)kxfer.sw_type<<16;
- msg[5] = swlen;
- msg[6] = kxfer.sw_id;
- token = i2o_post_wait(c, msg, sizeof(msg), 10);
- i2o_unlock_controller(c);
-
- if (token != I2O_POST_WAIT_OK)
- {
- printk(KERN_INFO "i2o_config: swdel failed, DetailedStatus = %dn", token);
- return -ETIMEDOUT;
- }
-
- return 0;
- }
- int ioctl_validate(unsigned long arg)
- {
- int token;
- int iop = (int)arg;
- u32 msg[4];
- struct i2o_controller *c;
- c=i2o_find_controller(iop);
- if (!c)
- return -ENXIO;
- msg[0] = FOUR_WORD_MSG_SIZE|SGL_OFFSET_0;
- msg[1] = I2O_CMD_CONFIG_VALIDATE<<24 | HOST_TID<<12 | iop;
- msg[2] = (u32)i2o_cfg_context;
- msg[3] = 0;
- token = i2o_post_wait(c, msg, sizeof(msg), 10);
- i2o_unlock_controller(c);
- if (token != I2O_POST_WAIT_OK)
- {
- printk(KERN_INFO "Can't validate configuration, ErrorStatus = %dn",
- token);
- return -ETIMEDOUT;
- }
- return 0;
- }
- static int ioctl_evt_reg(unsigned long arg, struct file *fp)
- {
- u32 msg[5];
- struct i2o_evt_id *pdesc = (struct i2o_evt_id *)arg;
- struct i2o_evt_id kdesc;
- struct i2o_controller *iop;
- struct i2o_device *d;
- if (copy_from_user(&kdesc, pdesc, sizeof(struct i2o_evt_id)))
- return -EFAULT;
- /* IOP exists? */
- iop = i2o_find_controller(kdesc.iop);
- if(!iop)
- return -ENXIO;
- i2o_unlock_controller(iop);
- /* Device exists? */
- for(d = iop->devices; d; d = d->next)
- if(d->lct_data.tid == kdesc.tid)
- break;
- if(!d)
- return -ENODEV;
- msg[0] = FOUR_WORD_MSG_SIZE|SGL_OFFSET_0;
- msg[1] = I2O_CMD_UTIL_EVT_REGISTER<<24 | HOST_TID<<12 | kdesc.tid;
- msg[2] = (u32)i2o_cfg_context;
- msg[3] = (u32)fp->private_data;
- msg[4] = kdesc.evt_mask;
- i2o_post_this(iop, msg, 20);
- return 0;
- }
- static int ioctl_evt_get(unsigned long arg, struct file *fp)
- {
- u32 id = (u32)fp->private_data;
- struct i2o_cfg_info *p = NULL;
- struct i2o_evt_get *uget = (struct i2o_evt_get*)arg;
- struct i2o_evt_get kget;
- unsigned long flags;
- for(p = open_files; p; p = p->next)
- if(p->q_id == id)
- break;
- if(!p->q_len)
- {
- return -ENOENT;
- return 0;
- }
- 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;
- }
- static int cfg_open(struct inode *inode, struct file *file)
- {
- struct i2o_cfg_info *tmp =
- (struct i2o_cfg_info *)kmalloc(sizeof(struct i2o_cfg_info), GFP_KERNEL);
- unsigned long flags;
- if(!tmp)
- return -ENOMEM;
- file->private_data = (void*)(i2o_cfg_info_id++);
- tmp->fp = file;
- tmp->fasync = NULL;
- tmp->q_id = (u32)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);
-
- return 0;
- }
- static int cfg_release(struct inode *inode, struct file *file)
- {
- u32 id = (u32)file->private_data;
- struct i2o_cfg_info *p1, *p2;
- unsigned long flags;
- lock_kernel();
- p1 = p2 = NULL;
- spin_lock_irqsave(&i2o_config_lock, flags);
- for(p1 = open_files; p1; )
- {
- if(p1->q_id == id)
- {
- if(p1->fasync)
- cfg_fasync(-1, file, 0);
- if(p2)
- p2->next = p1->next;
- else
- open_files = p1->next;
- kfree(p1);
- break;
- }
- p2 = p1;
- p1 = p1->next;
- }
- spin_unlock_irqrestore(&i2o_config_lock, flags);
- unlock_kernel();
- return 0;
- }
- static int cfg_fasync(int fd, struct file *fp, int on)
- {
- u32 id = (u32)fp->private_data;
- struct i2o_cfg_info *p;
- for(p = open_files; p; p = p->next)
- if(p->q_id == id)
- break;
- if(!p)
- return -EBADF;
- return fasync_helper(fd, fp, on, &p->fasync);
- }
- static struct file_operations config_fops =
- {
- owner: THIS_MODULE,
- llseek: no_llseek,
- read: cfg_read,
- write: cfg_write,
- ioctl: cfg_ioctl,
- open: cfg_open,
- release: cfg_release,
- fasync: cfg_fasync,
- };
- static struct miscdevice i2o_miscdev = {
- I2O_MINOR,
- "i2octl",
- &config_fops
- };
- #ifdef MODULE
- int init_module(void)
- #else
- int __init i2o_config_init(void)
- #endif
- {
- printk(KERN_INFO "I2O configuration manager v 0.04.n");
- printk(KERN_INFO " (C) Copyright 1999 Red Hat Softwaren");
-
- if((page_buf = kmalloc(4096, GFP_KERNEL))==NULL)
- {
- printk(KERN_ERR "i2o_config: no memory for page buffer.n");
- return -ENOBUFS;
- }
- if(misc_register(&i2o_miscdev)==-1)
- {
- printk(KERN_ERR "i2o_config: can't register device.n");
- kfree(page_buf);
- return -EBUSY;
- }
- /*
- * Install our handler
- */
- if(i2o_install_handler(&cfg_handler)<0)
- {
- kfree(page_buf);
- printk(KERN_ERR "i2o_config: handler register failed.n");
- misc_deregister(&i2o_miscdev);
- return -EBUSY;
- }
- /*
- * The low 16bits of the transaction context must match this
- * for everything we post. Otherwise someone else gets our mail
- */
- i2o_cfg_context = cfg_handler.context;
- return 0;
- }
- #ifdef MODULE
- void cleanup_module(void)
- {
- misc_deregister(&i2o_miscdev);
-
- if(page_buf)
- kfree(page_buf);
- if(i2o_cfg_context != -1)
- i2o_remove_handler(&cfg_handler);
- }
-
- EXPORT_NO_SYMBOLS;
- MODULE_AUTHOR("Red Hat Software");
- MODULE_DESCRIPTION("I2O Configuration");
- MODULE_LICENSE("GPL");
- #endif