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author	Jiri Kosina <jkosina@suse.cz>	2010-06-16 18:08:13 +0200
committer	Jiri Kosina <jkosina@suse.cz>	2010-06-16 18:08:13 +0200
commit	f1bbbb6912662b9f6070c5bfc4ca9eb1f06a9d5b (patch)
tree	c2c130a74be25b0b2dff992e1a195e2728bdaadd /drivers/acpi/Kconfig
parent	fd0961ff67727482bb20ca7e8ea97b83e9de2ddb (diff)
parent	7e27d6e778cd87b6f2415515d7127eba53fe5d02 (diff)
download	linux-f1bbbb6912662b9f6070c5bfc4ca9eb1f06a9d5b.tar.gz

Merge branch 'master' into for-next

Diffstat (limited to 'drivers/acpi/Kconfig')

-rw-r--r--

drivers/acpi/Kconfig

1 files changed, 9 insertions, 0 deletions

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/*
 * IEEE 1394 for Linux
 *
 * Raw interface to the bus
 *
 * Copyright (C) 1999, 2000 Andreas E. Bombe
 *               2001, 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
 *                     2002 Christian Toegel <christian.toegel@gmx.at>
 *
 * This code is licensed under the GPL.  See the file COPYING in the root
 * directory of the kernel sources for details.
 *
 *
 * Contributions:
 *
 * Manfred Weihs <weihs@ict.tuwien.ac.at>
 *        configuration ROM manipulation
 *        address range mapping
 *        adaptation for new (transparent) loopback mechanism
 *        sending of arbitrary async packets
 * Christian Toegel <christian.toegel@gmx.at>
 *        address range mapping
 *        lock64 request
 *        transmit physical packet
 *        busreset notification control (switch on/off)
 *        busreset with selection of type (short/long)
 *        request_reply
 */

#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/cdev.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <linux/devfs_fs_kernel.h>

#include "csr1212.h"
#include "ieee1394.h"
#include "ieee1394_types.h"
#include "ieee1394_core.h"
#include "nodemgr.h"
#include "hosts.h"
#include "highlevel.h"
#include "iso.h"
#include "ieee1394_transactions.h"
#include "raw1394.h"
#include "raw1394-private.h"

#define int2ptr(x) ((void __user *)(unsigned long)x)
#define ptr2int(x) ((u64)(unsigned long)(void __user *)x)

#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
#define RAW1394_DEBUG
#endif

#ifdef RAW1394_DEBUG
#define DBGMSG(fmt, args...) \
printk(KERN_INFO "raw1394:" fmt "\n" , ## args)
#else
#define DBGMSG(fmt, args...)
#endif

static LIST_HEAD(host_info_list);
static int host_count;
static DEFINE_SPINLOCK(host_info_lock);
static atomic_t internal_generation = ATOMIC_INIT(0);

static atomic_t iso_buffer_size;
static const int iso_buffer_max = 4 * 1024 * 1024;	/* 4 MB */

static struct hpsb_highlevel raw1394_highlevel;

static int arm_read(struct hpsb_host *host, int nodeid, quadlet_t * buffer,
		    u64 addr, size_t length, u16 flags);
static int arm_write(struct hpsb_host *host, int nodeid, int destid,
		     quadlet_t * data, u64 addr, size_t length, u16 flags);
static int arm_lock(struct hpsb_host *host, int nodeid, quadlet_t * store,
		    u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
		    u16 flags);
static int arm_lock64(struct hpsb_host *host, int nodeid, octlet_t * store,
		      u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
		      u16 flags);
static struct hpsb_address_ops arm_ops = {
	.read = arm_read,
	.write = arm_write,
	.lock = arm_lock,
	.lock64 = arm_lock64,
};

static void queue_complete_cb(struct pending_request *req);

static struct pending_request *__alloc_pending_request(gfp_t flags)
{
	struct pending_request *req;

	req = (struct pending_request *)kmalloc(sizeof(struct pending_request),
						flags);
	if (req != NULL) {
		memset(req, 0, sizeof(struct pending_request));
		INIT_LIST_HEAD(&req->list);
	}

	return req;
}

static inline struct pending_request *alloc_pending_request(void)
{
	return __alloc_pending_request(SLAB_KERNEL);
}

static void free_pending_request(struct pending_request *req)
{
	if (req->ibs) {
		if (atomic_dec_and_test(&req->ibs->refcount)) {
			atomic_sub(req->ibs->data_size, &iso_buffer_size);
			kfree(req->ibs);
		}
	} else if (req->free_data) {
		kfree(req->data);
	}
	hpsb_free_packet(req->packet);
	kfree(req);
}

/* fi->reqlists_lock must be taken */
static void __queue_complete_req(struct pending_request *req)
{
	struct file_info *fi = req->file_info;
	list_del(&req->list);
	list_add_tail(&req->list, &fi->req_complete);

	up(&fi->complete_sem);
	wake_up_interruptible(&fi->poll_wait_complete);
}

static void queue_complete_req(struct pending_request *req)
{
	unsigned long flags;
	struct file_info *fi = req->file_info;

	spin_lock_irqsave(&fi->reqlists_lock, flags);
	__queue_complete_req(req);
	spin_unlock_irqrestore(&fi->reqlists_lock, flags);
}

static void queue_complete_cb(struct pending_request *req)
{
	struct hpsb_packet *packet = req->packet;
	int rcode = (packet->header[1] >> 12) & 0xf;

	switch (packet->ack_code) {
	case ACKX_NONE:
	case ACKX_SEND_ERROR:
		req->req.error = RAW1394_ERROR_SEND_ERROR;
		break;
	case ACKX_ABORTED:
		req->req.error = RAW1394_ERROR_ABORTED;
		break;
	case ACKX_TIMEOUT:
		req->req.error = RAW1394_ERROR_TIMEOUT;
		break;
	default:
		req->req.error = (packet->ack_code << 16) | rcode;
		break;
	}

	if (!((packet->ack_code == ACK_PENDING) && (rcode == RCODE_COMPLETE))) {
		req->req.length = 0;
	}

	if ((req->req.type == RAW1394_REQ_ASYNC_READ) ||
	    (req->req.type == RAW1394_REQ_ASYNC_WRITE) ||
	    (req->req.type == RAW1394_REQ_ASYNC_STREAM) ||
	    (req->req.type == RAW1394_REQ_LOCK) ||
	    (req->req.type == RAW1394_REQ_LOCK64))
		hpsb_free_tlabel(packet);

	queue_complete_req(req);
}

static void add_host(struct hpsb_host *host)
{
	struct host_info *hi;
	unsigned long flags;

	hi = (struct host_info *)kmalloc(sizeof(struct host_info), GFP_KERNEL);

	if (hi != NULL) {
		INIT_LIST_HEAD(&hi->list);
		hi->host = host;
		INIT_LIST_HEAD(&hi->file_info_list);

		spin_lock_irqsave(&host_info_lock, flags);
		list_add_tail(&hi->list, &host_info_list);
		host_count++;
		spin_unlock_irqrestore(&host_info_lock, flags);
	}

	atomic_inc(&internal_generation);
}

static struct host_info *find_host_info(struct hpsb_host *host)
{
	struct host_info *hi;

	list_for_each_entry(hi, &host_info_list, list)
	    if (hi->host == host)
		return hi;

	return NULL;
}

static void remove_host(struct hpsb_host *host)
{
	struct host_info *hi;
	unsigned long flags;

	spin_lock_irqsave(&host_info_lock, flags);
	hi = find_host_info(host);

	if (hi != NULL) {
		list_del(&hi->list);
		host_count--;
		/*
		   FIXME: address ranges should be removed
		   and fileinfo states should be initialized
		   (including setting generation to
		   internal-generation ...)
		 */
	}
	spin_unlock_irqrestore(&host_info_lock, flags);

	if (hi == NULL) {
		printk(KERN_ERR "raw1394: attempt to remove unknown host "
		       "0x%p\n", host);
		return;
	}

	kfree(hi);

	atomic_inc(&internal_generation);
}

static void host_reset(struct hpsb_host *host)
{
	unsigned long flags;
	struct host_info *hi;
	struct file_info *fi;
	struct pending_request *req;

	spin_lock_irqsave(&host_info_lock, flags);
	hi = find_host_info(host);

	if (hi != NULL) {
		list_for_each_entry(fi, &hi->file_info_list, list) {
			if (fi->notification == RAW1394_NOTIFY_ON) {
				req = __alloc_pending_request(SLAB_ATOMIC);

				if (req != NULL) {
					req->file_info = fi;
					req->req.type = RAW1394_REQ_BUS_RESET;
					req->req.generation =
					    get_hpsb_generation(host);
					req->req.misc = (host->node_id << 16)
					    | host->node_count;
					if (fi->protocol_version > 3) {
						req->req.misc |=
						    (NODEID_TO_NODE
						     (host->irm_id)
						     << 8);
					}

					queue_complete_req(req);
				}
			}
		}
	}
	spin_unlock_irqrestore(&host_info_lock, flags);
}

static void iso_receive(struct hpsb_host *host, int channel, quadlet_t * data,
			size_t length)
{
	unsigned long flags;
	struct host_info *hi;
	struct file_info *fi;
	struct pending_request *req, *req_next;
	struct iso_block_store *ibs = NULL;
	LIST_HEAD(reqs);

	if ((atomic_read(&iso_buffer_size) + length) > iso_buffer_max) {
		HPSB_INFO("dropped iso packet");
		return;
	}

	spin_lock_irqsave(&host_info_lock, flags);
	hi = find_host_info(host);

	if (hi != NULL) {
		list_for_each_entry(fi, &hi->file_info_list, list) {
			if (!(fi->listen_channels & (1ULL << channel)))
				continue;

			req = __alloc_pending_request(SLAB_ATOMIC);
			if (!req)
				break;

			if (!ibs) {
				ibs = kmalloc(sizeof(struct iso_block_store)
					      + length, SLAB_ATOMIC);
				if (!ibs) {
					kfree(req);
					break;
				}

				atomic_add(length, &iso_buffer_size);
				atomic_set(&ibs->refcount, 0);
				ibs->data_size = length;
				memcpy(ibs->data, data, length);
			}

			atomic_inc(&ibs->refcount);

			req->file_info = fi;
			req->ibs = ibs;
			req->data = ibs->data;
			req->req.type = RAW1394_REQ_ISO_RECEIVE;
			req->req.generation = get_hpsb_generation(host);
			req->req.misc = 0;
			req->req.recvb = ptr2int(fi->iso_buffer);
			req->req.length = min(length, fi->iso_buffer_length);

			list_add_tail(&req->list, &reqs);
		}
	}
	spin_unlock_irqrestore(&host_info_lock, flags);

	list_for_each_entry_safe(req, req_next, &reqs, list)
	    queue_complete_req(req);
}

static void fcp_request(struct hpsb_host *host, int nodeid, int direction,
			int cts, u8 * data, size_t length)
{
	unsigned long flags;
	struct host_info *hi;
	struct file_info *fi;
	struct pending_request *req, *req_next;
	struct iso_block_store *ibs = NULL;
	LIST_HEAD(reqs);

	if ((atomic_read(&iso_buffer_size) + length) > iso_buffer_max) {
		HPSB_INFO("dropped fcp request");
		return;
	}

	spin_lock_irqsave(&host_info_lock, flags);
	hi = find_host_info(host);

	if (hi != NULL) {
		list_for_each_entry(fi, &hi->file_info_list, list) {
			if (!fi->fcp_buffer)
				continue;

			req = __alloc_pending_request(SLAB_ATOMIC);
			if (!req)
				break;

			if (!ibs) {
				ibs = kmalloc(sizeof(struct iso_block_store)
					      + length, SLAB_ATOMIC);
				if (!ibs) {
					kfree(req);
					break;
				}

				atomic_add(length, &iso_buffer_size);
				atomic_set(&ibs->refcount, 0);
				ibs->data_size = length;
				memcpy(ibs->data, data, length);
			}

			atomic_inc(&ibs->refcount);

			req->file_info = fi;
			req->ibs = ibs;
			req->data = ibs->data;
			req->req.type = RAW1394_REQ_FCP_REQUEST;
			req->req.generation = get_hpsb_generation(host);
			req->req.misc = nodeid | (direction << 16);
			req->req.recvb = ptr2int(fi->fcp_buffer);
			req->req.length = length;

			list_add_tail(&req->list, &reqs);
		}
	}
	spin_unlock_irqrestore(&host_info_lock, flags);

	list_for_each_entry_safe(req, req_next, &reqs, list)
	    queue_complete_req(req);
}

static ssize_t raw1394_read(struct file *file, char __user * buffer,
			    size_t count, loff_t * offset_is_ignored)
{
	unsigned long flags;
	struct file_info *fi = (struct file_info *)file->private_data;
	struct list_head *lh;
	struct pending_request *req;
	ssize_t ret;

	if (count != sizeof(struct raw1394_request)) {
		return -EINVAL;
	}

	if (!access_ok(VERIFY_WRITE, buffer, count)) {
		return -EFAULT;
	}

	if (file->f_flags & O_NONBLOCK) {
		if (down_trylock(&fi->complete_sem)) {
			return -EAGAIN;
		}
	} else {
		if (down_interruptible(&fi->complete_sem)) {
			return -ERESTARTSYS;
		}
	}

	spin_lock_irqsave(&fi->reqlists_lock, flags);
	lh = fi->req_complete.next;
	list_del(lh);
	spin_unlock_irqrestore(&fi->reqlists_lock, flags);

	req = list_entry(lh, struct pending_request, list);

	if (req->req.length) {
		if (copy_to_user(int2ptr(req->req.recvb), req->data,
				 req->req.length)) {
			req->req.error = RAW1394_ERROR_MEMFAULT;
		}
	}
	if (copy_to_user(buffer, &req->req, sizeof(req->req))) {
		ret = -EFAULT;
		goto out;
	}

	ret = (ssize_t) sizeof(struct raw1394_request);
      out:
	free_pending_request(req);
	return ret;
}

static int state_opened(struct file_info *fi, struct pending_request *req)
{
	if (req->req.type == RAW1394_REQ_INITIALIZE) {
		switch (req->req.misc) {
		case RAW1394_KERNELAPI_VERSION:
		case 3:
			fi->state = initialized;
			fi->protocol_version = req->req.misc;
			req->req.error = RAW1394_ERROR_NONE;
			req->req.generation = atomic_read(&internal_generation);
			break;

		default:
			req->req.error = RAW1394_ERROR_COMPAT;
			req->req.misc = RAW1394_KERNELAPI_VERSION;
		}
	} else {
		req->req.error = RAW1394_ERROR_STATE_ORDER;
	}

	req->req.length = 0;
	queue_complete_req(req);
	return sizeof(struct raw1394_request);
}

static int state_initialized(struct file_info *fi, struct pending_request *req)
{
	unsigned long flags;
	struct host_info *hi;
	struct raw1394_khost_list *khl;

	if (req->req.generation != atomic_read(&internal_generation)) {
		req->req.error = RAW1394_ERROR_GENERATION;
		req->req.generation = atomic_read(&internal_generation);
		req->req.length = 0;
		queue_complete_req(req);
		return sizeof(struct raw1394_request);
	}

	switch (req->req.type) {
	case RAW1394_REQ_LIST_CARDS:
		spin_lock_irqsave(&host_info_lock, flags);
		khl = kmalloc(sizeof(struct raw1394_khost_list) * host_count,
			      SLAB_ATOMIC);

		if (khl != NULL) {
			req->req.misc = host_count;
			req->data = (quadlet_t *) khl;

			list_for_each_entry(hi, &host_info_list, list) {
				khl->nodes = hi->host->node_count;
				strcpy(khl->name, hi->host->driver->name);
				khl++;
			}
		}
		spin_unlock_irqrestore(&host_info_lock, flags);

		if (khl != NULL) {
			req->req.error = RAW1394_ERROR_NONE;
			req->req.length = min(req->req.length,
					      (u32) (sizeof
						     (struct raw1394_khost_list)
						     * req->req.misc));
			req->free_data = 1;
		} else {
			return -ENOMEM;
		}
		break;

	case RAW1394_REQ_SET_CARD:
		spin_lock_irqsave(&host_info_lock, flags);
		if (req->req.misc < host_count) {
			list_for_each_entry(hi, &host_info_list, list) {
				if (!req->req.misc--)
					break;
			}
			get_device(&hi->host->device);	// XXX Need to handle failure case
			list_add_tail(&fi->list, &hi->file_info_list);
			fi->host = hi->host;
			fi->state = connected;

			req->req.error = RAW1394_ERROR_NONE;
			req->req.generation = get_hpsb_generation(fi->host);
			req->req.misc = (fi->host->node_id << 16)
			    | fi->host->node_count;
			if (fi->protocol_version > 3) {
				req->req.misc |=
				    NODEID_TO_NODE(fi->host->irm_id) << 8;
			}
		} else {
			req->req.error = RAW1394_ERROR_INVALID_ARG;
		}
		spin_unlock_irqrestore(&host_info_lock, flags);

		req->req.length = 0;
		break;

	default:
		req->req.error = RAW1394_ERROR_STATE_ORDER;
		req->req.length = 0;
		break;
	}

	queue_complete_req(req);
	return sizeof(struct raw1394_request);
}

static void handle_iso_listen(struct file_info *fi, struct pending_request *req)
{
	int channel = req->req.misc;

	if ((channel > 63) || (channel < -64)) {
		req->req.error = RAW1394_ERROR_INVALID_ARG;
	} else if (channel >= 0) {
		/* allocate channel req.misc */
		if (fi->listen_channels & (1ULL << channel)) {
			req->req.error = RAW1394_ERROR_ALREADY;
		} else {
			if (hpsb_listen_channel
			    (&raw1394_highlevel, fi->host, channel)) {
				req->req.error = RAW1394_ERROR_ALREADY;
			} else {
				fi->listen_channels |= 1ULL << channel;
				fi->iso_buffer = int2ptr(req->req.recvb);
				fi->iso_buffer_length = req->req.length;
			}
		}
	} else {
		/* deallocate channel (one's complement neg) req.misc */
		channel = ~channel;

		if (fi->listen_channels & (1ULL << channel)) {
			hpsb_unlisten_channel(&raw1394_highlevel, fi->host,
					      channel);
			fi->listen_channels &= ~(1ULL << channel);
		} else {
			req->req.error = RAW1394_ERROR_INVALID_ARG;
		}
	}

	req->req.length = 0;
	queue_complete_req(req);
}

static void handle_fcp_listen(struct file_info *fi, struct pending_request *req)
{
	if (req->req.misc) {
		if (fi->fcp_buffer) {
			req->req.error = RAW1394_ERROR_ALREADY;
		} else {
			fi->fcp_buffer = int2ptr(req->req.recvb);
		}
	} else {
		if (!fi->fcp_buffer) {
			req->req.error = RAW1394_ERROR_ALREADY;
		} else {
			fi->fcp_buffer = NULL;
		}
	}

	req->req.length = 0;
	queue_complete_req(req);
}

static int handle_async_request(struct file_info *fi,
				struct pending_request *req, int node)
{
	unsigned long flags;
	struct hpsb_packet *packet = NULL;
	u64 addr = req->req.address & 0xffffffffffffULL;

	switch (req->req.type) {
	case RAW1394_REQ_ASYNC_READ:
		DBGMSG("read_request called");
		packet =
		    hpsb_make_readpacket(fi->host, node, addr, req->req.length);

		if (!packet)
			return -ENOMEM;

		if (req->req.length == 4)
			req->data = &packet->header[3];
		else
			req->data = packet->data;

		break;

	case RAW1394_REQ_ASYNC_WRITE:
		DBGMSG("write_request called");

		packet = hpsb_make_writepacket(fi->host, node, addr, NULL,
					       req->req.length);
		if (!packet)
			return -ENOMEM;

		if (req->req.length == 4) {
			if (copy_from_user
			    (&packet->header[3], int2ptr(req->req.sendb),
			     req->req.length))
				req->req.error = RAW1394_ERROR_MEMFAULT;
		} else {
			if (copy_from_user
			    (packet->data, int2ptr(req->req.sendb),
			     req->req.length))
				req->req.error = RAW1394_ERROR_MEMFAULT;
		}

		req->req.length = 0;
		break;

	case RAW1394_REQ_ASYNC_STREAM:
		DBGMSG("stream_request called");

		packet =
		    hpsb_make_streampacket(fi->host, NULL, req->req.length,
					   node & 0x3f /*channel */ ,
					   (req->req.misc >> 16) & 0x3,
					   req->req.misc & 0xf);
		if (!packet)
			return -ENOMEM;

		if (copy_from_user(packet->data, int2ptr(req->req.sendb),
				   req->req.length))
			req->req.error = RAW1394_ERROR_MEMFAULT;

		req->req.length = 0;
		break;

	case RAW1394_REQ_LOCK:
		DBGMSG("lock_request called");
		if ((req->req.misc == EXTCODE_FETCH_ADD)
		    || (req->req.misc == EXTCODE_LITTLE_ADD)) {
			if (req->req.length != 4) {
				req->req.error = RAW1394_ERROR_INVALID_ARG;
				break;
			}
		} else {
			if (req->req.length != 8) {
				req->req.error = RAW1394_ERROR_INVALID_ARG;
				break;
			}
		}

		packet = hpsb_make_lockpacket(fi->host, node, addr,
					      req->req.misc, NULL, 0);
		if (!packet)
			return -ENOMEM;

		if (copy_from_user(packet->data, int2ptr(req->req.sendb),
				   req->req.length)) {
			req->req.error = RAW1394_ERROR_MEMFAULT;
			break;
		}

		req->data = packet->data;
		req->req.length = 4;
		break;

	case RAW1394_REQ_LOCK64:
		DBGMSG("lock64_request called");
		if ((req->req.misc == EXTCODE_FETCH_ADD)
		    || (req->req.misc == EXTCODE_LITTLE_ADD)) {
			if (req->req.length != 8) {
				req->req.error = RAW1394_ERROR_INVALID_ARG;
				break;
			}
		} else {
			if (req->req.length != 16) {
				req->req.error = RAW1394_ERROR_INVALID_ARG;
				break;
			}
		}
		packet = hpsb_make_lock64packet(fi->host, node, addr,
						req->req.misc, NULL, 0);
		if (!packet)
			return -ENOMEM;

		if (copy_from_user(packet->data, int2ptr(req->req.sendb),
				   req->req.length)) {
			req->req.error = RAW1394_ERROR_MEMFAULT;
			break;
		}

		req->data = packet->data;
		req->req.length = 8;
		break;

	default:
		req->req.error = RAW1394_ERROR_STATE_ORDER;
	}

	req->packet = packet;

	if (req->req.error) {
		req->req.length = 0;
		queue_complete_req(req);
		return sizeof(struct raw1394_request);
	}

	hpsb_set_packet_complete_task(packet,
				      (void (*)(void *))queue_complete_cb, req);

	spin_lock_irqsave(&fi->reqlists_lock, flags);
	list_add_tail(&req->list, &fi->req_pending);
	spin_unlock_irqrestore(&fi->reqlists_lock, flags);

	packet->generation = req->req.generation;

	if (hpsb_send_packet(packet) < 0) {
		req->req.error = RAW1394_ERROR_SEND_ERROR;
		req->req.length = 0;
		hpsb_free_tlabel(packet);
		queue_complete_req(req);
	}
	return sizeof(struct raw1394_request);
}

static int handle_iso_send(struct file_info *fi, struct pending_request *req,
			   int channel)
{
	unsigned long flags;
	struct hpsb_packet *packet;

	packet = hpsb_make_isopacket(fi->host, req->req.length, channel & 0x3f,
				     (req->req.misc >> 16) & 0x3,
				     req->req.misc & 0xf);
	if (!packet)
		return -ENOMEM;

	packet->speed_code = req->req.address & 0x3;

	req->packet = packet;

	if (copy_from_user(packet->data, int2ptr(req->req.sendb),
			   req->req.length)) {
		req->req.error = RAW1394_ERROR_MEMFAULT;
		req->req.length = 0;
		queue_complete_req(req);
		return sizeof(struct raw1394_request);
	}

	req->req.length = 0;
	hpsb_set_packet_complete_task(packet,
				      (void (*)(void *))queue_complete_req,
				      req);

	spin_lock_irqsave(&fi->reqlists_lock, flags);
	list_add_tail(&req->list, &fi->req_pending);
	spin_unlock_irqrestore(&fi->reqlists_lock, flags);

	/* Update the generation of the packet just before sending. */
	packet->generation = req->req.generation;

	if (hpsb_send_packet(packet) < 0) {
		req->req.error = RAW1394_ERROR_SEND_ERROR;
		queue_complete_req(req);
	}

	return sizeof(struct raw1394_request);
}

static int handle_async_send(struct file_info *fi, struct pending_request *req)
{
	unsigned long flags;
	struct hpsb_packet *packet;
	int header_length = req->req.misc & 0xffff;
	int expect_response = req->req.misc >> 16;

	if ((header_length > req->req.length) || (header_length < 12)) {
		req->req.error = RAW1394_ERROR_INVALID_ARG;
		req->req.length = 0;
		queue_complete_req(req);
		return sizeof(struct raw1394_request);
	}

	packet = hpsb_alloc_packet(req->req.length - header_length);
	req->packet = packet;
	if (!packet)
		return -ENOMEM;

	if (copy_from_user(packet->header, int2ptr(req->req.sendb),
			   header_length)) {
		req->req.error = RAW1394_ERROR_MEMFAULT;
		req->req.length = 0;
		queue_complete_req(req);
		return sizeof(struct raw1394_request);
	}

	if (copy_from_user
	    (packet->data, int2ptr(req->req.sendb) + header_length,
	     packet->data_size)) {
		req->req.error = RAW1394_ERROR_MEMFAULT;
		req->req.length = 0;
		queue_complete_req(req);
		return sizeof(struct raw1394_request);
	}

	packet->type = hpsb_async;
	packet->node_id = packet->header[0] >> 16;
	packet->tcode = (packet->header[0] >> 4) & 0xf;
	packet->tlabel = (packet->header[0] >> 10) & 0x3f;
	packet->host = fi->host;
	packet->expect_response = expect_response;
	packet->header_size = header_length;
	packet->data_size = req->req.length - header_length;

	req->req.length = 0;
	hpsb_set_packet_complete_task(packet,
				      (void (*)(void *))queue_complete_cb, req);

	spin_lock_irqsave(&fi->reqlists_lock, flags);
	list_add_tail(&req->list, &fi->req_pending);
	spin_unlock_irqrestore(&fi->reqlists_lock, flags);

	/* Update the generation of the packet just before sending. */
	packet->generation = req->req.generation;

	if (hpsb_send_packet(packet) < 0) {
		req->req.error = RAW1394_ERROR_SEND_ERROR;
		queue_complete_req(req);
	}

	return sizeof(struct raw1394_request);
}

static int arm_read(struct hpsb_host *host, int nodeid, quadlet_t * buffer,
		    u64 addr, size_t length, u16 flags)
{
	unsigned long irqflags;
	struct pending_request *req;
	struct host_info *hi;
	struct file_info *fi = NULL;
	struct list_head *entry;
	struct arm_addr *arm_addr = NULL;
	struct arm_request *arm_req = NULL;
	struct arm_response *arm_resp = NULL;
	int found = 0, size = 0, rcode = -1;
	struct arm_request_response *arm_req_resp = NULL;

	DBGMSG("arm_read  called by node: %X"
	       "addr: %4.4x %8.8x length: %Zu", nodeid,
	       (u16) ((addr >> 32) & 0xFFFF), (u32) (addr & 0xFFFFFFFF),
	       length);
	spin_lock_irqsave(&host_info_lock, irqflags);
	hi = find_host_info(host);	/* search address-entry */
	if (hi != NULL) {
		list_for_each_entry(fi, &hi->file_info_list, list) {
			entry = fi->addr_list.next;
			while (entry != &(fi->addr_list)) {
				arm_addr =
				    list_entry(entry, struct arm_addr,
					       addr_list);
				if (((arm_addr->start) <= (addr))
				    && ((arm_addr->end) >= (addr + length))) {
					found = 1;
					break;
				}
				entry = entry->next;
			}
			if (found) {
				break;
			}
		}
	}
	rcode = -1;
	if (!found) {
		printk(KERN_ERR "raw1394: arm_read FAILED addr_entry not found"
		       " -> rcode_address_error\n");
		spin_unlock_irqrestore(&host_info_lock, irqflags);
		return (RCODE_ADDRESS_ERROR);
	} else {
		DBGMSG("arm_read addr_entry FOUND");
	}
	if (arm_addr->rec_length < length) {
		DBGMSG("arm_read blocklength too big -> rcode_data_error");
		rcode = RCODE_DATA_ERROR;	/* hardware error, data is unavailable */
	}
	if (rcode == -1) {
		if (arm_addr->access_rights & ARM_READ) {
			if (!(arm_addr->client_transactions & ARM_READ)) {
				memcpy(buffer,
				       (arm_addr->addr_space_buffer) + (addr -
									(arm_addr->
									 start)),
				       length);
				DBGMSG("arm_read -> (rcode_complete)");
				rcode = RCODE_COMPLETE;
			}
		} else {
			rcode = RCODE_TYPE_ERROR;	/* function not allowed */
			DBGMSG("arm_read -> rcode_type_error (access denied)");
		}
	}
	if (arm_addr->notification_options & ARM_READ) {
		DBGMSG("arm_read -> entering notification-section");
		req = __alloc_pending_request(SLAB_ATOMIC);
		if (!req) {
			DBGMSG("arm_read -> rcode_conflict_error");
			spin_unlock_irqrestore(&host_info_lock, irqflags);
			return (RCODE_CONFLICT_ERROR);	/* A resource conflict was detected.
							   The request may be retried */
		}
		if (rcode == RCODE_COMPLETE) {
			size =
			    sizeof(struct arm_request) +
			    sizeof(struct arm_response) +
			    length * sizeof(byte_t) +
			    sizeof(struct arm_request_response);
		} else {
			size =
			    sizeof(struct arm_request) +
			    sizeof(struct arm_response) +
			    sizeof(struct arm_request_response);
		}
		req->data = kmalloc(size, SLAB_ATOMIC);
		if (!(req->data)) {
			free_pending_request(req);
			DBGMSG("arm_read -> rcode_conflict_error");
			spin_unlock_irqrestore(&host_info_lock, irqflags);
			return (RCODE_CONFLICT_ERROR);	/* A resource conflict was detected.
							   The request may be retried */
		}
		req->free_data = 1;
		req->file_info = fi;
		req->req.type = RAW1394_REQ_ARM;
		req->req.generation = get_hpsb_generation(host);
		req->req.misc =
		    (((length << 16) & (0xFFFF0000)) | (ARM_READ & 0xFF));
		req->req.tag = arm_addr->arm_tag;
		req->req.recvb = arm_addr->recvb;
		req->req.length = size;
		arm_req_resp = (struct arm_request_response *)(req->data);
		arm_req = (struct arm_request *)((byte_t *) (req->data) +
						 (sizeof
						  (struct
						   arm_request_response)));
		arm_resp =
		    (struct arm_response *)((byte_t *) (arm_req) +
					    (sizeof(struct arm_request)));
		arm_req->buffer = NULL;
		arm_resp->buffer = NULL;
		if (rcode == RCODE_COMPLETE) {
			byte_t *buf =
			    (byte_t *) arm_resp + sizeof(struct arm_response);
			memcpy(buf,
			       (arm_addr->addr_space_buffer) + (addr -
								(arm_addr->
								 start)),
			       length);
			arm_resp->buffer =
			    int2ptr((arm_addr->recvb) +
				    sizeof(struct arm_request_response) +
				    sizeof(struct arm_request) +
				    sizeof(struct arm_response));
		}
		arm_resp->buffer_length =
		    (rcode == RCODE_COMPLETE) ? length : 0;
		arm_resp->response_code = rcode;
		arm_req->buffer_length = 0;
		arm_req->generation = req->req.generation;
		arm_req->extended_transaction_code = 0;
		arm_req->destination_offset = addr;
		arm_req->source_nodeid = nodeid;
		arm_req->destination_nodeid = host->node_id;
		arm_req->tlabel = (flags >> 10) & 0x3f;
		arm_req->tcode = (flags >> 4) & 0x0f;
		arm_req_resp->request = int2ptr((arm_addr->recvb) +
						sizeof(struct
						       arm_request_response));
		arm_req_resp->response =
		    int2ptr((arm_addr->recvb) +
			    sizeof(struct arm_request_response) +
			    sizeof(struct arm_request));
		queue_complete_req(req);
	}
	spin_unlock_irqrestore(&host_info_lock, irqflags);
	return (rcode);
}

static int arm_write(struct hpsb_host *host, int nodeid, int destid,
		     quadlet_t * data, u64 addr, size_t length, u16 flags)
{
	unsigned long irqflags;
	struct pending_request *req;
	struct host_info *hi;
	struct file_info *fi = NULL;
	struct list_head *entry;
	struct arm_addr *arm_addr = NULL;
	struct arm_request *arm_req = NULL;
	struct arm_response *arm_resp = NULL;
	int found = 0, size = 0, rcode = -1, length_conflict = 0;
	struct arm_request_response *arm_req_resp = NULL;

	DBGMSG("arm_write called by node: %X"
	       "addr: %4.4x %8.8x length: %Zu", nodeid,
	       (u16) ((addr >> 32) & 0xFFFF), (u32) (addr & 0xFFFFFFFF),
	       length);
	spin_lock_irqsave(&host_info_lock, irqflags);
	hi = find_host_info(host);	/* search address-entry */
	if (hi != NULL) {
		list_for_each_entry(fi, &hi->file_info_list, list) {
			entry = fi->addr_list.next;
			while (entry != &(fi->addr_list)) {
				arm_addr =
				    list_entry(entry, struct arm_addr,
					       addr_list);
				if (((arm_addr->start) <= (addr))
				    && ((arm_addr->end) >= (addr + length))) {
					found = 1;
					break;
				}
				entry = entry->next;
			}
			if (found) {
				break;
			}
		}
	}
	rcode = -1;
	if (!found) {
		printk(KERN_ERR "raw1394: arm_write FAILED addr_entry not found"
		       " -> rcode_address_error\n");
		spin_unlock_irqrestore(&host_info_lock, irqflags);
		return (RCODE_ADDRESS_ERROR);
	} else {
		DBGMSG("arm_write addr_entry FOUND");
	}
	if (arm_addr->rec_length < length) {
		DBGMSG("arm_write blocklength too big -> rcode_data_error");
		length_conflict = 1;
		rcode = RCODE_DATA_ERROR;	/* hardware error, data is unavailable */
	}
	if (rcode == -1) {
		if (arm_addr->access_rights & ARM_WRITE) {
			if (!(arm_addr->client_transactions & ARM_WRITE)) {
				memcpy((arm_addr->addr_space_buffer) +
				       (addr - (arm_addr->start)), data,
				       length);
				DBGMSG("arm_write -> (rcode_complete)");
				rcode = RCODE_COMPLETE;
			}
		} else {
			rcode = RCODE_TYPE_ERROR;	/* function not allowed */
			DBGMSG("arm_write -> rcode_type_error (access denied)");
		}
	}
	if (arm_addr->notification_options & ARM_WRITE) {
		DBGMSG("arm_write -> entering notification-section");
		req = __alloc_pending_request(SLAB_ATOMIC);
		if (!req) {
			DBGMSG("arm_write -> rcode_conflict_error");
			spin_unlock_irqrestore(&host_info_lock, irqflags);
			return (RCODE_CONFLICT_ERROR);	/* A resource conflict was detected.
							   The request my be retried */
		}
		size =
		    sizeof(struct arm_request) + sizeof(struct arm_response) +
		    (length) * sizeof(byte_t) +
		    sizeof(struct arm_request_response);
		req->data = kmalloc(size, SLAB_ATOMIC);
		if (!(req->data)) {
			free_pending_request(req);
			DBGMSG("arm_write -> rcode_conflict_error");
			spin_unlock_irqrestore(&host_info_lock, irqflags);
			return (RCODE_CONFLICT_ERROR);	/* A resource conflict was detected.
							   The request may be retried */
		}
		req->free_data = 1;
		req->file_info = fi;
		req->req.type = RAW1394_REQ_ARM;
		req->req.generation = get_hpsb_generation(host);
		req->req.misc =
		    (((length << 16) & (0xFFFF0000)) | (ARM_WRITE & 0xFF));
		req->req.tag = arm_addr->arm_tag;
		req->req.recvb = arm_addr->recvb;
		req->req.length = size;
		arm_req_resp = (struct arm_request_response *)(req->data);
		arm_req = (struct arm_request *)((byte_t *) (req->data) +
						 (sizeof
						  (struct
						   arm_request_response)));
		arm_resp =
		    (struct arm_response *)((byte_t *) (arm_req) +
					    (sizeof(struct arm_request)));
		arm_resp->buffer = NULL;
		memcpy((byte_t *) arm_resp + sizeof(struct arm_response),
		       data, length);
		arm_req->buffer = int2ptr((arm_addr->recvb) +
					  sizeof(struct arm_request_response) +
					  sizeof(struct arm_request) +
					  sizeof(struct arm_response));
		arm_req->buffer_length = length;
		arm_req->generation = req->req.generation;
		arm_req->extended_transaction_code = 0;
		arm_req->destination_offset = addr;
		arm_req->source_nodeid = nodeid;
		arm_req->destination_nodeid = destid;
		arm_req->tlabel = (flags >> 10) & 0x3f;
		arm_req->tcode = (flags >> 4) & 0x0f;
		arm_resp->buffer_length = 0;
		arm_resp->response_code = rcode;
		arm_req_resp->request = int2ptr((arm_addr->recvb) +
						sizeof(struct
						       arm_request_response));
		arm_req_resp->response =
		    int2ptr((arm_addr->recvb) +
			    sizeof(struct arm_request_response) +
			    sizeof(struct arm_request));
		queue_complete_req(req);
	}
	spin_unlock_irqrestore(&host_info_lock, irqflags);
	return (rcode);
}

static int arm_lock(struct hpsb_host *host, int nodeid, quadlet_t * store,
		    u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
		    u16 flags)
{
	unsigned long irqflags;
	struct pending_request *req;
	struct host_info *hi;
	struct file_info *fi = NULL;
	struct list_head *entry;
	struct arm_addr *arm_addr = NULL;
	struct arm_request *arm_req = NULL;
	struct arm_response *arm_resp = NULL;
	int found = 0, size = 0, rcode = -1;
	quadlet_t old, new;
	struct arm_request_response *arm_req_resp = NULL;

	if (((ext_tcode & 0xFF) == EXTCODE_FETCH_ADD) ||
	    ((ext_tcode & 0xFF) == EXTCODE_LITTLE_ADD)) {
		DBGMSG("arm_lock  called by node: %X "
		       "addr: %4.4x %8.8x extcode: %2.2X data: %8.8X",
		       nodeid, (u16) ((addr >> 32) & 0xFFFF),
		       (u32) (addr & 0xFFFFFFFF), ext_tcode & 0xFF,
		       be32_to_cpu(data));
	} else {
		DBGMSG("arm_lock  called by node: %X "
		       "addr: %4.4x %8.8x extcode: %2.2X data: %8.8X arg: %8.8X",
		       nodeid, (u16) ((addr >> 32) & 0xFFFF),
		       (u32) (addr & 0xFFFFFFFF), ext_tcode & 0xFF,
		       be32_to_cpu(data), be32_to_cpu(arg));
	}
	spin_lock_irqsave(&host_info_lock, irqflags);
	hi = find_host_info(host);	/* search address-entry */
	if (hi != NULL) {
		list_for_each_entry(fi, &hi->file_info_list, list) {
			entry = fi->addr_list.next;
			while (entry != &(fi->addr_list)) {
				arm_addr =
				    list_entry(entry, struct arm_addr,
					       addr_list);
				if (((arm_addr->start) <= (addr))
				    && ((arm_addr->end) >=
					(addr + sizeof(*store)))) {
					found = 1;
					break;
				}
				entry = entry->next;
			}
			if (found) {
				break;
			}
		}
	}
	rcode = -1;
	if (!found) {
		printk(KERN_ERR "raw1394: arm_lock FAILED addr_entry not found"
		       " -> rcode_address_error\n");
		spin_unlock_irqrestore(&host_info_lock, irqflags);
		return (RCODE_ADDRESS_ERROR);
	} else {
		DBGMSG("arm_lock addr_entry FOUND");
	}
	if (rcode == -1) {
		if (arm_addr->access_rights & ARM_LOCK) {
			if (!(arm_addr->client_transactions & ARM_LOCK)) {
				memcpy(&old,
				       (arm_addr->addr_space_buffer) + (addr -
									(arm_addr->
									 start)),
				       sizeof(old));
				switch (ext_tcode) {
				case (EXTCODE_MASK_SWAP):
					new = data | (old & ~arg);
					break;
				case (EXTCODE_COMPARE_SWAP):
					if (old == arg) {
						new = data;
					} else {
						new = old;
					}
					break;
				case (EXTCODE_FETCH_ADD):
					new =
					    cpu_to_be32(be32_to_cpu(data) +
							be32_to_cpu(old));
					break;
				case (EXTCODE_LITTLE_ADD):
					new =
					    cpu_to_le32(le32_to_cpu(data) +
							le32_to_cpu(old));
					break;
				case (EXTCODE_BOUNDED_ADD):
					if (old != arg) {
						new =
						    cpu_to_be32(be32_to_cpu
								(data) +
								be32_to_cpu
								(old));
					} else {
						new = old;
					}
					break;
				case (EXTCODE_WRAP_ADD):
					if (old != arg) {
						new =
						    cpu_to_be32(be32_to_cpu
								(data) +
								be32_to_cpu
								(old));
					} else {
						new = data;
					}
					break;
				default:


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