Move the source code files in the juju directory into the src directory and

give them 'fw' names instead of 'juju.'

1 files changed, 1369 insertions, 0 deletions

diff --git a/src/fw.c b/src/fw.c
new file mode 100644
index 0000000..1322fe2
--- /dev/null
+++ b/src/fw.c
@@ -0,0 +1,1369 @@
+/*						-*- c-basic-offset: 8 -*-
+ *
+ * raw1394.c -- Emulation of the raw1394 API on the fw stack
+ *
+ * Copyright (C) 2007  Kristian Hoegsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <sys/ioctl.h>
+#include <sys/epoll.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <arpa/inet.h> /* for ntohl and htonl */
+
+#include "fw.h"
+#include "raw1394_private.h"
+
+int
+fw_errcode_to_errno(raw1394_errcode_t errcode)
+{
+	switch (errcode) {
+
+	case -RCODE_SEND_ERROR:
+	case -RCODE_CANCELLED:
+	case -RCODE_BUSY:
+	case -RCODE_GENERATION:
+	case -RCODE_NO_ACK:
+		return EAGAIN;
+
+	case raw1394_make_errcode(ACK_COMPLETE, RCODE_COMPLETE):
+		return 0;
+	case raw1394_make_errcode(ACK_COMPLETE, RCODE_CONFLICT_ERROR):
+		return EAGAIN;
+	case raw1394_make_errcode(ACK_COMPLETE, RCODE_DATA_ERROR):
+		return EREMOTEIO;
+	case raw1394_make_errcode(ACK_COMPLETE, RCODE_TYPE_ERROR):
+		return EPERM;
+	case raw1394_make_errcode(ACK_COMPLETE, RCODE_ADDRESS_ERROR):
+		return EINVAL;
+	default:
+		return EINVAL;
+	}
+}
+
+static int
+fw_to_raw1394_errcode(int rcode)
+{
+	/* Best effort matching fw extended rcodes to raw1394 err
+	 * code.  Since the raw1394 errcode decoding are macros we try
+	 * to convert the fw rcodes to something that looks enough
+	 * like the raw1394 errcodes that we retain ABI compatibility.
+	 *
+	 * Juju rcodes less than 0x10 are standard ieee1394 rcodes,
+	 * which we map to a raw1394 errcode by or'ing in an
+	 * ACK_COMPLETE ack code in the upper 16 bits.  Errors
+	 * internal to raw1394 are negative values, but fw encodes
+	 * these errors as rcodes greater than or equal to 0x10.  In
+	 * this case, we just the negated value, which will look like
+	 * an raw1394 internal error code. */
+
+	if (rcode < 0x10)
+		return raw1394_make_errcode(ACK_COMPLETE, rcode);
+	else
+		return -rcode;
+}
+
+static int
+default_tag_handler(raw1394handle_t handle,
+		    unsigned long tag, raw1394_errcode_t err)
+{
+	struct raw1394_reqhandle *rh = (struct raw1394_reqhandle *) tag;
+
+	if (rh != NULL)
+		return rh->callback(handle, rh->data, err);
+
+	return -1;
+}
+
+static int
+default_arm_tag_handler(raw1394handle_t handle, unsigned long arm_tag,
+			byte_t type, unsigned int length, void *data)
+{
+	struct raw1394_arm_reqhandle *rh;
+
+	if (arm_tag == 0)
+		return -1;
+
+	rh = (struct raw1394_arm_reqhandle *) arm_tag;
+
+	return rh->arm_callback(handle, data, length, rh->pcontext, type);
+}
+
+static int
+default_bus_reset_handler(raw1394handle_t handle, unsigned int gen)
+{
+	handle->mode.fw->generation = gen;
+
+	return 0;
+}
+
+static int
+scan_devices(fw_handle_t handle)
+{
+	DIR *dir;
+	struct dirent *de;
+	char filename[32];
+	struct fw_cdev_get_info get_info;
+	struct fw_cdev_event_bus_reset reset;
+	int fd, err, i;
+	struct port *ports;
+
+	ports = handle->ports;
+	memset(ports, 0, sizeof handle->ports);
+	dir = opendir(FW_DEVICE_DIR);
+	if (dir == NULL)
+		return -1;
+
+	i = 0;
+	while (1) {
+		de = readdir(dir);
+		if (de == NULL)
+			break;
+
+		if (strncmp(de->d_name,
+			    FW_DEVICE_PREFIX, strlen(FW_DEVICE_PREFIX)) != 0)
+			continue;
+
+		snprintf(filename, sizeof filename, FW_DEVICE_DIR "/%s", de->d_name);
+
+		fd = open(filename, O_RDWR);
+		if (fd < 0)
+			continue;
+		get_info.version = FW_CDEV_VERSION;
+		get_info.rom = 0;
+		get_info.rom_length = 0;
+		get_info.bus_reset = ptr_to_u64(&reset);
+		err = ioctl(fd, FW_CDEV_IOC_GET_INFO, &get_info);
+		close(fd);
+
+		if (err < 0)
+			continue;
+
+		if (i < MAX_PORTS && reset.node_id == reset.local_node_id) {
+			strncpy(ports[i].device_file, filename,
+				sizeof ports[i].device_file);
+			ports[i].node_count = (reset.root_node_id & 0x3f) + 1;
+			ports[i].card = get_info.card;
+			i++;
+		}
+	}
+	closedir(dir);
+
+	handle->port_count = i;
+
+	return 0;
+}
+
+static int
+handle_echo_pipe(raw1394handle_t handle,
+		 struct epoll_closure *ec, __uint32_t events)
+{
+	quadlet_t value;
+
+	if (read(handle->mode.fw->pipe_fds[0], &value, sizeof value) < 0)
+		return -1;
+
+	return value;
+}
+
+static int
+handle_lost_device(fw_handle_t handle, int i)
+{
+	int phy_id;
+
+	/* The device got unplugged, get rid of it.  The fd is
+	 * automatically dropped from the epoll context when we close it. */
+
+	close(handle->devices[i].fd);
+	phy_id = handle->devices[i].node_id & 0x3f;
+	if (handle->nodes[phy_id] == i)
+		handle->nodes[phy_id] = -1;
+	handle->devices[i].node_id = -1;
+
+	return 0;
+}
+
+struct address_closure {
+	int (*callback)(raw1394handle_t handle, struct address_closure *ac,
+			struct fw_cdev_event_request *request, int i);
+};
+
+static int
+handle_fcp_request(raw1394handle_t handle, struct address_closure *ac,
+		   struct fw_cdev_event_request *request, int i)
+{
+	struct fw_cdev_send_response response;
+	int is_response;
+
+	response.handle = request->handle;
+	response.rcode  = RCODE_COMPLETE;
+	response.length = 0;
+	response.data   = 0;
+
+	if (handle->mode.fw->fcp_handler == NULL)
+		response.rcode = RCODE_ADDRESS_ERROR;
+
+	if (request->tcode >= TCODE_WRITE_RESPONSE)
+		response.rcode = RCODE_CONFLICT_ERROR;
+
+	if (ioctl(handle->mode.fw->devices[i].fd,
+		  FW_CDEV_IOC_SEND_RESPONSE, &response) < 0)
+		return -1;
+
+	if (response.rcode != RCODE_COMPLETE)
+		return 0;
+
+	is_response = request->offset >= CSR_REGISTER_BASE + CSR_FCP_RESPONSE;
+
+	return handle->mode.fw->fcp_handler(handle,
+				   handle->mode.fw->devices[i].node_id,
+				   is_response,
+				   request->length,
+				   (unsigned char *) request->data);
+}
+
+static int
+handle_device_event(raw1394handle_t handle,
+		    struct epoll_closure *ec, __uint32_t events)
+{
+	fw_handle_t fwhandle = handle->mode.fw;
+	union fw_cdev_event *u;
+	struct device *device = (struct device *) ec;
+	struct address_closure *ac;
+	struct request_closure *rc;
+	raw1394_errcode_t errcode;
+	int len, phy_id;
+	int i;
+
+	i = device - fwhandle->devices;
+	if (events == EPOLLHUP)
+		return handle_lost_device(fwhandle, i);
+
+	len = read(fwhandle->devices[i].fd,
+		   fwhandle->buffer, sizeof fwhandle->buffer);
+	if (len < 0)
+		return -1;
+
+	u = (void *) fwhandle->buffer;
+	switch (u->common.type) {
+	case FW_CDEV_EVENT_BUS_RESET:
+		/* Clear old entry, unless it's been overwritten. */
+		phy_id = fwhandle->devices[i].node_id & 0x3f;
+		if (fwhandle->nodes[phy_id] == i)
+			fwhandle->nodes[phy_id] = -1;
+		fwhandle->nodes[u->bus_reset.node_id & 0x3f] = i;
+		fwhandle->devices[i].node_id = u->bus_reset.node_id;
+		fwhandle->devices[i].generation = u->bus_reset.generation;
+
+		if (u->bus_reset.node_id != u->bus_reset.local_node_id)
+			return 0;
+
+		memcpy(&fwhandle->reset, &u->bus_reset, sizeof fwhandle->reset);
+		return fwhandle->bus_reset_handler(handle,
+						 u->bus_reset.generation);
+
+	case FW_CDEV_EVENT_RESPONSE:
+		rc = u64_to_ptr(u->response.closure);
+
+		if (rc->data != NULL)
+			memcpy(rc->data, u->response.data, rc->length);
+
+		errcode = fw_to_raw1394_errcode(u->response.rcode);
+
+		return fwhandle->tag_handler(handle, rc->tag, errcode);
+
+	case FW_CDEV_EVENT_REQUEST:
+		ac = u64_to_ptr(u->request.closure);
+		return ac->callback(handle, ac, &u->request, i);
+
+	default:
+	case FW_CDEV_EVENT_ISO_INTERRUPT:
+		/* Never happens. */
+		return -1;
+	}
+}
+
+static int
+handle_inotify(raw1394handle_t handle, struct epoll_closure *ec,
+	       __uint32_t events)
+{
+	fw_handle_t fwhandle = handle->mode.fw;
+	struct inotify_event *event;
+	char filename[32];
+	struct fw_cdev_get_info info;
+	struct fw_cdev_event_bus_reset reset;
+	struct epoll_event ep;
+	int i, len, fd, phy_id;
+
+	event = (struct inotify_event *) fwhandle->buffer;
+	len = read(fwhandle->inotify_fd, event, BUFFER_SIZE);
+	if (!(event->mask & IN_CREATE))
+		return -1;
+	if (strncmp(event->name,
+		    FW_DEVICE_PREFIX, strlen(FW_DEVICE_PREFIX)) != 0)
+		return 0;
+	snprintf(filename, sizeof filename, FW_DEVICE_DIR "/%s", event->name);
+	fd = open(filename, O_RDWR);
+	if (fd < 0) {
+		switch (errno) {
+		case ENOENT:
+			/* Huh, it disappeared before we could
+			 * open it. */
+			return 0;
+		case EACCES:
+			/* We don't have permission to talk to
+			 * this device, maybe it's a storage
+			 * device. */
+			return 0;
+		default:
+			/* Anything else is bad news. */
+			return -1;
+		}
+	}
+
+	info.version = FW_CDEV_VERSION;
+	info.rom = 0;
+	info.rom_length = 0;
+	info.bus_reset = ptr_to_u64(&reset);
+	if (ioctl(fd, FW_CDEV_IOC_GET_INFO, &info) < 0) {
+		close(fd);
+		return -1;
+	}
+
+	for (i = 0; i < MAX_DEVICES; i++)
+		if (fwhandle->devices[i].node_id == -1)
+			break;
+	if (i == MAX_DEVICES) {
+		close(fd);
+		return -1;
+	}
+
+	phy_id = reset.node_id & 0x3f;
+	fwhandle->nodes[phy_id] = i;
+	fwhandle->devices[i].node_id = reset.node_id;
+	fwhandle->devices[i].generation = reset.generation;
+	fwhandle->devices[i].fd = fd;
+	strncpy(fwhandle->devices[i].filename, filename,
+		sizeof fwhandle->devices[i].filename);
+	fwhandle->devices[i].closure.func = handle_device_event;
+	ep.events = EPOLLIN;
+	ep.data.ptr = &fwhandle->devices[i].closure;
+	if (epoll_ctl(fwhandle->epoll_fd, EPOLL_CTL_ADD, fd, &ep) < 0) {
+		close(fd);
+		return -1;
+	}
+
+	return 0;
+}
+
+int fw_loop_iterate(raw1394handle_t handle)
+{
+	int i, count, retval = 0;
+	struct epoll_closure *closure;
+	struct epoll_event ep[32];
+
+	count = epoll_wait(handle->mode.fw->epoll_fd, ep, ARRAY_LENGTH(ep), -1);
+	if (count < 0)
+		return -1;
+
+	for (i = 0; i < count; i++) {
+		closure = ep[i].data.ptr;
+		retval = closure->func(handle, closure, ep[i].events);
+	}
+
+	/* It looks like we have to add this work-around to get epoll
+	 * to recompute the POLLIN status of the epoll_fd. */
+	epoll_wait(handle->mode.fw->epoll_fd, ep, ARRAY_LENGTH(ep), 0);
+
+	return retval;
+}
+
+fw_handle_t fw_new_handle(void)
+{
+	fw_handle_t handle;
+	struct epoll_event ep;
+	int i;
+
+	handle = malloc(sizeof *handle);
+
+	handle->tag_handler = default_tag_handler;
+	handle->arm_tag_handler = default_arm_tag_handler;
+	handle->allocations = NULL;
+
+	handle->notify_bus_reset = RAW1394_NOTIFY_ON;
+	handle->bus_reset_handler = default_bus_reset_handler;
+
+	handle->iso.fd = -1;
+
+	handle->epoll_fd = epoll_create(16);
+	if (handle->epoll_fd < 0)
+		goto out_handle;
+
+	if (pipe(handle->pipe_fds) < 0)
+		goto out_epoll;
+
+	handle->inotify_fd = inotify_init();
+	if (handle->inotify_fd < 0)
+		goto out_pipe;
+
+	handle->inotify_watch =
+		inotify_add_watch(handle->inotify_fd, FW_DEVICE_DIR, IN_CREATE);
+	if (handle->inotify_watch < 0)
+		goto out_inotify;
+
+	handle->pipe_closure.func = handle_echo_pipe;
+	ep.events = EPOLLIN;
+	ep.data.ptr = &handle->pipe_closure;
+	if (epoll_ctl(handle->epoll_fd, EPOLL_CTL_ADD,
+		      handle->pipe_fds[0], &ep) < 0)
+		goto out_inotify;
+
+	handle->inotify_closure.func = handle_inotify;
+	ep.events = EPOLLIN;
+	ep.data.ptr = &handle->inotify_closure;
+	if (epoll_ctl(handle->epoll_fd, EPOLL_CTL_ADD,
+		      handle->inotify_fd, &ep) < 0)
+		goto out_inotify;
+
+	for (i = 0; i < MAX_DEVICES; i++) {
+		handle->nodes[i] = -1;
+		handle->devices[i].node_id = -1;
+	}
+
+	scan_devices(handle);
+
+	return handle;
+
+ out_inotify:
+	close(handle->inotify_fd);
+ out_pipe:
+	close(handle->pipe_fds[0]);
+	close(handle->pipe_fds[1]);
+ out_epoll:
+	close(handle->epoll_fd);
+ out_handle:
+	free(handle);
+	return NULL;
+}
+
+void fw_destroy_handle(fw_handle_t handle)
+{
+	int i;
+
+	close(handle->inotify_fd);
+	close(handle->pipe_fds[0]);
+	close(handle->pipe_fds[1]);
+
+	for (i = 0; i < MAX_DEVICES; i++) {
+		if (handle->devices[i].node_id == -1)
+			continue;
+
+		close(handle->devices[i].fd);
+	}
+
+	close(handle->epoll_fd);
+
+	free(handle);
+
+	return;
+}
+
+fw_handle_t fw_new_handle_on_port(int port)
+{
+	fw_handle_t handle;
+
+	handle = fw_new_handle();
+	if (handle == NULL)
+		return NULL;
+
+	if (fw_set_port(handle, port) < 0)
+		return NULL;
+
+	return handle;
+}
+
+int fw_busreset_notify (fw_handle_t handle, int off_on_switch)
+{
+	handle->notify_bus_reset = off_on_switch;
+
+	return 0;
+}
+
+int fw_get_fd(fw_handle_t handle)
+{
+	return handle->epoll_fd;
+}
+
+nodeid_t fw_get_local_id(fw_handle_t handle)
+{
+	return handle->reset.local_node_id;
+}
+
+nodeid_t fw_get_irm_id(fw_handle_t handle)
+{
+	return handle->reset.irm_node_id;
+}
+
+int fw_get_nodecount(fw_handle_t handle)
+{
+	return (handle->reset.root_node_id & 0x3f) + 1;
+}
+
+int fw_get_port_info(fw_handle_t handle,
+			  struct raw1394_portinfo *pinf,
+			  int maxports)
+{
+	int i;
+
+	if (maxports >= handle->port_count)
+		maxports = handle->port_count;
+
+	for (i = 0; i < maxports; i++) {
+		pinf[i].nodes = handle->ports[i].node_count;
+		strncpy(pinf[i].name, handle->ports[i].device_file,
+			sizeof pinf[i].name);
+	}
+
+	return handle->port_count;
+}
+
+int fw_set_port(fw_handle_t handle, int port)
+{
+	struct fw_cdev_get_info get_info;
+	struct fw_cdev_event_bus_reset reset;
+	struct epoll_event ep;
+	struct dirent *de;
+	char filename[32];
+	DIR *dir;
+	int i, fd, phy_id;
+
+	if (port >= handle->port_count) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	dir = opendir("/dev");
+	if (dir == NULL)
+		return -1;
+
+	for (i = 0; i < MAX_DEVICES; ) {
+		de = readdir(dir);
+		if (de == NULL)
+			break;
+
+		if (strncmp(de->d_name, "fw", 2) != 0)
+			continue;
+
+		snprintf(filename, sizeof filename, "/dev/%s", de->d_name);
+
+		fd = open(filename, O_RDWR);
+		if (fd < 0)
+			continue;
+
+		get_info.version = FW_CDEV_VERSION;
+		get_info.rom = 0;
+		get_info.rom_length = 0;
+		get_info.bus_reset = ptr_to_u64(&reset);
+		if (ioctl(fd, FW_CDEV_IOC_GET_INFO, &get_info) < 0) {
+			close(fd);
+			continue;
+		}
+
+		if (get_info.card != handle->ports[port].card) {
+			close(fd);
+			continue;
+		}
+
+		phy_id = reset.node_id & 0x3f;
+		handle->nodes[phy_id] = i;
+		handle->devices[i].node_id = reset.node_id;
+		handle->devices[i].generation = reset.generation;
+		handle->devices[i].fd = fd;
+		strncpy(handle->devices[i].filename, filename,
+			sizeof handle->devices[i].filename);
+
+		handle->devices[i].closure.func = handle_device_event;
+		ep.events = EPOLLIN;
+		ep.data.ptr = &handle->devices[i].closure;
+		if (epoll_ctl(handle->epoll_fd, EPOLL_CTL_ADD, fd, &ep) < 0) {
+			close(fd);
+			return -1;
+		}
+
+		handle->generation = reset.generation;
+		if (reset.node_id == reset.local_node_id) {
+			memcpy(&handle->reset, &reset, sizeof handle->reset);
+			handle->local_fd = fd;
+			strncpy(handle->local_filename, filename,
+				sizeof handle->local_filename);
+		}
+
+		i++;
+	}
+
+	return 0;
+}
+
+int fw_reset_bus_new(fw_handle_t handle, int type)
+{
+	struct fw_cdev_initiate_bus_reset initiate;
+
+	switch (type) {
+	case RAW1394_LONG_RESET:
+		initiate.type = FW_CDEV_LONG_RESET;
+		break;
+	case RAW1394_SHORT_RESET:
+		initiate.type = FW_CDEV_SHORT_RESET;
+		break;
+	}
+
+	return ioctl(handle->local_fd,
+		     FW_CDEV_IOC_INITIATE_BUS_RESET, &initiate);
+}
+
+struct request_response_block {
+	struct raw1394_arm_request_response request_response;
+	struct raw1394_arm_request request;
+	struct raw1394_arm_response response;
+	unsigned char data[0];
+};
+
+struct allocation {
+	struct address_closure closure;
+	struct allocation *next;
+	__u32 handle;
+	byte_t *buffer;
+	octlet_t tag;
+	arm_options_t access_rights;
+	arm_options_t notification_options;
+	arm_options_t client_transactions;
+	nodeaddr_t offset;
+	size_t length;
+	unsigned char data[0];
+};
+
+static int
+handle_arm_request(raw1394handle_t handle, struct address_closure *ac,
+		   struct fw_cdev_event_request *request, int i)
+{
+	fw_handle_t fwhandle = handle->mode.fw;
+	struct allocation *allocation = (struct allocation *) ac;
+	struct request_response_block *rrb;
+	struct fw_cdev_send_response response;
+	arm_options_t type;
+	size_t in_length;
+	int offset;
+
+	offset = request->offset - allocation->offset;
+	response.handle = request->handle;
+
+	switch (request->tcode) {
+	case TCODE_WRITE_QUADLET_REQUEST:
+	case TCODE_WRITE_BLOCK_REQUEST:
+		printf("got write request, offset=0x%012llx, length=%d\n",
+		       request->offset, request->length);
+
+		type = RAW1394_ARM_WRITE;
+		in_length = request->length;
+		response.rcode  = RCODE_COMPLETE;
+		response.length = 0;
+		response.data   = 0;
+		break;
+
+	case TCODE_READ_QUADLET_REQUEST:
+	case TCODE_READ_BLOCK_REQUEST:
+		printf("got read request, offset=0x%012llx, length=%d\n",
+		       request->offset, request->length);
+
+		type = RAW1394_ARM_READ;
+		in_length = 0;
+		response.rcode = RCODE_COMPLETE;
+		response.length = request->length;
+		response.data = ptr_to_u64(allocation->data + offset);
+		break;
+
+	case TCODE_LOCK_REQUEST:
+		type = RAW1394_ARM_LOCK;
+		in_length = request->length;
+		response.length = 4;
+		break;
+
+	default:
+		in_length = 0;
+		type = 0;
+		break;
+	}
+
+	if (!(allocation->access_rights & type)) {
+		response.rcode  = RCODE_TYPE_ERROR;
+		response.length = 0;
+		response.data   = 0;
+		if (ioctl(fwhandle->devices[i].fd,
+			  FW_CDEV_IOC_SEND_RESPONSE, &response) < 0)
+			return -1;
+	} else if (!(allocation->client_transactions & type)) {
+		if (type == RAW1394_ARM_WRITE)
+			memcpy(allocation->data + offset,
+			       request->data, request->length);
+		else if (type == RAW1394_ARM_LOCK)
+			/* FIXME: do lock ops here */;
+
+		if (ioctl(fwhandle->devices[i].fd,
+			  FW_CDEV_IOC_SEND_RESPONSE, &response) < 0)
+			return -1;
+	}
+
+	if (!(allocation->notification_options & type))
+		return 0;
+
+	rrb = malloc(sizeof *rrb + in_length + response.length);
+
+	rrb->request_response.request = &rrb->request;
+	rrb->request_response.response = &rrb->response;
+
+	rrb->request.destination_nodeid = fwhandle->reset.local_node_id;
+	rrb->request.source_nodeid = fwhandle->devices[i].node_id;
+	rrb->request.destination_offset = request->offset;
+	rrb->request.tlabel = 0;
+	if (request->tcode < 0x10) {
+		rrb->request.tcode = request->tcode;
+		rrb->request.extended_transaction_code = 0;
+	} else {
+		rrb->request.tcode = TCODE_LOCK_REQUEST;
+		rrb->request.extended_transaction_code = request->tcode - 0x10;
+	}
+	rrb->request.generation = fwhandle->reset.generation;
+	rrb->request.buffer_length = in_length;
+	memcpy(rrb->request.buffer, request->data, in_length);
+
+	rrb->response.response_code = response.rcode;
+	rrb->response.buffer_length = response.length;
+	memcpy(rrb->response.buffer,
+	       allocation->data + offset, response.length);
+
+	return fwhandle->arm_tag_handler(handle, allocation->tag, type,
+				       request->length,
+				       &rrb->request_response);
+}
+
+int
+fw_arm_register(fw_handle_t handle, nodeaddr_t start,
+		     size_t length, byte_t *initial_value,
+		     octlet_t arm_tag, arm_options_t access_rights,
+		     arm_options_t notification_options,
+		     arm_options_t client_transactions)
+{
+	struct fw_cdev_allocate request;
+	struct allocation *allocation;
+	int retval;
+
+	allocation = malloc(sizeof *allocation + length);
+	if (allocation == NULL)
+		return -1;
+
+	allocation->closure.callback = handle_arm_request;
+	allocation->buffer = initial_value;
+	allocation->tag = arm_tag;
+	allocation->access_rights = access_rights;
+	allocation->notification_options = notification_options;
+	allocation->client_transactions = client_transactions;
+	allocation->offset = start;
+	allocation->length = length;
+	if (initial_value != NULL)
+		memcpy(allocation->data, initial_value, length);
+
+	request.offset = start;
+	request.length = length;
+	request.closure = ptr_to_u64(&allocation->closure);
+
+	retval = ioctl(handle->local_fd, FW_CDEV_IOC_ALLOCATE, &request);
+	if (retval < 0) {
+		free(allocation);
+		return -1;
+	}
+
+	allocation->handle = request.handle;
+	allocation->next = handle->allocations;
+	handle->allocations = allocation;
+
+	return 0;
+}
+
+static struct allocation *
+lookup_allocation(fw_handle_t handle, nodeaddr_t start, int delete)
+{
+	struct allocation *a, **prev;
+
+	prev = &handle->allocations;
+	for (a = handle->allocations; a != NULL; a = a->next) {
+		if (a->offset <= start && start < a->offset + a->length)
+			break;
+		prev = &a->next;
+	}
+
+	if (a != NULL && delete)
+		*prev = a->next;
+
+	return a;
+}
+
+int
+fw_arm_unregister(fw_handle_t handle, nodeaddr_t start)
+{
+	struct fw_cdev_deallocate request;
+	struct allocation *allocation;
+
+	allocation = lookup_allocation(handle, start, 1);
+	if (allocation == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	request.handle = allocation->handle;
+	free(allocation);
+
+	return ioctl(handle->local_fd, FW_CDEV_IOC_DEALLOCATE, &request);
+}
+
+int
+fw_arm_set_buf(fw_handle_t handle, nodeaddr_t start,
+		    size_t length, void *buf)
+{
+	struct allocation *allocation;
+
+	allocation = lookup_allocation(handle, start, 0);
+	if (allocation == NULL) {
+		errno = ENOENT;
+		return -1;
+	}
+
+	memcpy(allocation->data + allocation->offset - start, buf, length);
+
+	return 0;
+}
+
+int
+fw_arm_get_buf(fw_handle_t handle, nodeaddr_t start,
+		    size_t length, void *buf)
+{
+	struct allocation *allocation;
+
+	allocation = lookup_allocation(handle, start, 0);
+	if (allocation == NULL) {
+		errno = ENOENT;
+		return -1;
+	}
+
+	memcpy(buf, allocation->data + allocation->offset - start, length);
+
+	return 0;
+}
+
+int
+fw_echo_request(fw_handle_t handle, quadlet_t data)
+{
+	return write(handle->pipe_fds[1], &data, sizeof data);
+}
+
+int fw_wake_up(fw_handle_t handle)
+{
+	return fw_echo_request(handle, 0);
+}
+
+int fw_phy_packet_write (fw_handle_t handle, quadlet_t data)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+int
+fw_start_phy_packet_write(fw_handle_t handle,
+			       quadlet_t data, unsigned long tag)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int
+send_request(fw_handle_t handle, int tcode,
+	     nodeid_t node, nodeaddr_t addr,
+	     size_t length, void *in, void *out, unsigned long tag)
+{
+	struct fw_cdev_send_request *request;
+	struct request_closure *closure;
+	int i;
+
+	if (node > handle->reset.root_node_id) {
+		handle->err = -RCODE_NO_ACK;
+		errno = fw_errcode_to_errno(handle->err);
+		return -1;
+	}
+
+	i = handle->nodes[node & 0x3f];
+	if (i == -1) {
+		handle->err = -RCODE_NO_ACK;
+		errno = fw_errcode_to_errno(handle->err);
+		return -1;
+	}
+
+	if (handle->generation != handle->devices[i].generation) {
+		handle->err = -RCODE_GENERATION;
+		errno = fw_errcode_to_errno(handle->err);
+		return -1;
+	}
+
+	closure = malloc(sizeof *closure);
+	if (closure == NULL) {
+		handle->err = -RCODE_SEND_ERROR;
+		errno = fw_errcode_to_errno(handle->err);
+		return -1;
+	}
+
+	closure->data = out;
+	closure->length = length;
+	closure->tag = tag;
+
+	request = (struct fw_cdev_send_request *) handle->buffer;
+	request->tcode = tcode;
+	request->generation = handle->generation;
+	request->offset = addr;
+	request->length = length;
+	request->closure = ptr_to_u64(closure);
+	request->data = ptr_to_u64(in);
+
+	return ioctl(handle->devices[i].fd, FW_CDEV_IOC_SEND_REQUEST, request);
+}
+
+int
+fw_start_read(fw_handle_t handle, nodeid_t node, nodeaddr_t addr,
+		   size_t length, quadlet_t *buffer, unsigned long tag)
+{
+	int tcode;
+
+	if (length == 4)
+		tcode = TCODE_READ_QUADLET_REQUEST;
+	else
+		tcode = TCODE_READ_BLOCK_REQUEST;
+
+	return send_request(handle, tcode,
+			    node, addr, length, NULL, buffer, tag);
+}
+
+int
+fw_start_write(fw_handle_t handle, nodeid_t node, nodeaddr_t addr,
+		    size_t length, quadlet_t *data, unsigned long tag)
+{
+	int tcode;
+
+	if (length == 4)
+		tcode = TCODE_WRITE_QUADLET_REQUEST;
+	else
+		tcode = TCODE_WRITE_BLOCK_REQUEST;
+
+	return send_request(handle, tcode,
+			    node, addr, length, data, NULL, tag);
+}
+
+static int
+setup_lock(int extcode, quadlet_t data, quadlet_t arg, quadlet_t *buffer)
+{
+	switch (extcode) {
+	case RAW1394_EXTCODE_FETCH_ADD:
+	case RAW1394_EXTCODE_LITTLE_ADD:
+		buffer[0] = data;
+		return sizeof buffer[0];
+
+	case RAW1394_EXTCODE_MASK_SWAP:
+	case RAW1394_EXTCODE_COMPARE_SWAP:
+	case RAW1394_EXTCODE_BOUNDED_ADD:
+	case RAW1394_EXTCODE_WRAP_ADD:
+		buffer[0] = arg;
+		buffer[1] = data;
+		return 2 * sizeof buffer[0];
+
+	default:
+		errno = EINVAL;
+		return -1;
+	}
+}
+
+static int
+setup_lock64(int extcode, octlet_t data, octlet_t arg, octlet_t *buffer)
+{
+	switch (extcode) {
+	case RAW1394_EXTCODE_FETCH_ADD:
+	case RAW1394_EXTCODE_LITTLE_ADD:
+		buffer[0] = data;
+		return sizeof buffer[0];
+
+	case RAW1394_EXTCODE_MASK_SWAP:
+	case RAW1394_EXTCODE_COMPARE_SWAP:
+	case RAW1394_EXTCODE_BOUNDED_ADD:
+	case RAW1394_EXTCODE_WRAP_ADD:
+		buffer[0] = arg;
+		buffer[1] = data;
+		return 2 * sizeof buffer[0];
+
+	default:
+		errno = EINVAL;
+		return -1;
+	}
+}
+
+int
+fw_start_lock(fw_handle_t handle, nodeid_t node, nodeaddr_t addr,
+		   unsigned int extcode, quadlet_t data, quadlet_t arg,
+		   quadlet_t *result, unsigned long tag)
+{
+	quadlet_t buffer[2];
+	int length;
+
+	length = setup_lock(extcode, data, arg, buffer);
+	if (length < 0)
+		return length;
+
+	return send_request(handle, 16 + extcode,
+			    node, addr, length, buffer, result, tag);
+}
+
+int
+fw_start_lock64(fw_handle_t handle, nodeid_t node, nodeaddr_t addr,
+		     unsigned int extcode, octlet_t data, octlet_t arg,
+		     octlet_t *result, unsigned long tag)
+{
+	octlet_t buffer[2];
+	int length;
+
+	length = setup_lock64(extcode, data, arg, buffer);
+	if (length < 0)
+		return length;
+
+	return send_request(handle, 16 + extcode,
+			    node, addr, length, buffer, result, tag);
+}
+
+int
+fw_start_async_stream(fw_handle_t handle, unsigned int channel,
+			   unsigned int tag, unsigned int sy,
+			   unsigned int speed, size_t length, quadlet_t *data,
+			   unsigned long rawtag)
+{
+	/* FIXME: implement this? */
+	return -1;
+}
+
+
+int
+fw_start_async_send(fw_handle_t handle,
+			 size_t length, size_t header_length,
+			 unsigned int expect_response,
+			 quadlet_t *data, unsigned long rawtag)
+{
+	/* FIXME: implement this? */
+	return -1;
+}
+
+struct sync_data {
+	raw1394_errcode_t err;
+	int done;
+};
+
+static int
+sync_callback(raw1394handle_t handle, void *data, raw1394_errcode_t err)
+{
+	struct sync_data *sd = data;
+
+	sd->err = err;
+	sd->done = 1;
+
+	return 0;
+}
+
+static int
+send_request_sync(raw1394handle_t handle, int tcode,
+		  nodeid_t node, nodeaddr_t addr,
+		  size_t length, void *in, void *out)
+{
+	fw_handle_t fwhandle = handle->mode.fw;
+	struct raw1394_reqhandle reqhandle;
+	struct sync_data sd = { 0, 0 };
+	int err;
+
+	reqhandle.callback = sync_callback;
+	reqhandle.data = &sd;
+
+	err = send_request(fwhandle, tcode, node, addr,
+			   length, in, out, (unsigned long) &reqhandle);
+
+	while (!sd.done) {
+		if (err < 0)
+			return err;
+		err = fw_loop_iterate(handle);
+	}
+
+	fwhandle->err = sd.err;
+	errno = fw_errcode_to_errno(sd.err);
+
+	return (errno ? -1 : 0);
+}
+
+int
+fw_read(raw1394handle_t handle, nodeid_t node, nodeaddr_t addr,
+	     size_t length, quadlet_t *buffer)
+{
+	int tcode;
+
+	if (length == 4)
+		tcode = TCODE_READ_QUADLET_REQUEST;
+	else
+		tcode = TCODE_READ_BLOCK_REQUEST;
+
+	return send_request_sync(handle, tcode,
+				 node, addr, length, NULL, buffer);
+}
+
+int
+fw_write(raw1394handle_t handle, nodeid_t node, nodeaddr_t addr,
+	      size_t length, quadlet_t *data)
+{
+	int tcode;
+
+	if (length == 4)
+		tcode = TCODE_WRITE_QUADLET_REQUEST;
+	else
+		tcode = TCODE_WRITE_BLOCK_REQUEST;
+
+	return send_request_sync(handle, tcode,
+				 node, addr, length, data, NULL);
+}
+
+int
+fw_lock(raw1394handle_t handle, nodeid_t node, nodeaddr_t addr,
+	     unsigned int extcode, quadlet_t data, quadlet_t arg,
+	     quadlet_t *result)
+{
+	quadlet_t buffer[2];
+	size_t length;
+
+	length = setup_lock(extcode, data, arg, buffer);
+	if (length < 0)
+		return length;
+
+	return send_request_sync(handle, 16 + extcode, node, addr,
+				 length, buffer, result);
+}
+
+int
+fw_lock64(raw1394handle_t handle, nodeid_t node, nodeaddr_t addr,
+	       unsigned int extcode, octlet_t data, octlet_t arg,
+	       octlet_t *result)
+{
+	octlet_t buffer[2];
+	size_t length;
+
+	length = setup_lock64(extcode, data, arg, buffer);
+	if (length < 0)
+		return length;
+
+	return send_request_sync(handle, 16 + extcode, node, addr,
+				 length, buffer, result);
+}
+
+int
+fw_async_stream(fw_handle_t handle, unsigned int channel,
+		     unsigned int tag, unsigned int sy, unsigned int speed,
+		     size_t length, quadlet_t *data)
+{
+	/* FIXME: implement this? */
+	return -1;
+}
+
+int
+fw_async_send(fw_handle_t handle,
+		   size_t length, size_t header_length,
+		   unsigned int expect_response,
+		   quadlet_t *data)
+{
+	/* FIXME: implement this? */
+	return -1;
+}
+
+int
+fw_start_fcp_listen(fw_handle_t handle)
+{
+	struct fw_cdev_allocate request;
+	struct address_closure *closure;
+
+	closure = malloc(sizeof *closure);
+	if (closure == NULL)
+		return -1;
+
+	closure->callback = handle_fcp_request;
+
+	request.offset = CSR_REGISTER_BASE + CSR_FCP_COMMAND;
+	request.length = CSR_FCP_END - CSR_FCP_COMMAND;
+	request.closure = ptr_to_u64(closure);
+	if (ioctl(handle->local_fd, FW_CDEV_IOC_ALLOCATE, &request) < 0)
+		return -1;
+
+	handle->fcp_allocation_handle = request.handle;
+
+	return 0;
+}
+
+int
+fw_stop_fcp_listen(fw_handle_t handle)
+{
+	struct fw_cdev_deallocate request;
+
+	request.handle = handle->fcp_allocation_handle;
+
+	return ioctl(handle->local_fd, FW_CDEV_IOC_DEALLOCATE, &request);
+}
+
+int
+fw_update_config_rom(fw_handle_t handle, const quadlet_t *new_rom,
+			  size_t size, unsigned char rom_version)
+{
+	return -1;
+}
+
+int
+fw_get_config_rom(fw_handle_t handle, quadlet_t *buffer,
+		       size_t buffersize, size_t *rom_size,
+		       unsigned char *rom_version)
+{
+	struct fw_cdev_get_info get_info;
+	int err;
+
+	get_info.version = FW_CDEV_VERSION;
+	get_info.rom = ptr_to_u64(buffer);
+	get_info.rom_length = buffersize;
+	get_info.bus_reset = 0;
+
+	err = ioctl(handle->local_fd, FW_CDEV_IOC_GET_INFO, &get_info);
+	if (err)
+		return err;
+
+	*rom_size = get_info.rom_length;
+	*rom_version = 0;
+
+	return 0;
+}
+
+#define MAXIMUM_BANDWIDTH 4915
+
+int
+fw_bandwidth_modify (raw1394handle_t handle,
+			  unsigned int bandwidth,
+			  enum raw1394_modify_mode mode)
+{
+	quadlet_t buffer, compare, swap;
+	nodeaddr_t addr;
+	int result;
+
+        if (bandwidth == 0)
+                return 0;
+        
+	addr = CSR_REGISTER_BASE + CSR_BANDWIDTH_AVAILABLE;
+        /* Read current bandwidth usage from IRM. */
+        result = raw1394_read (handle, raw1394_get_irm_id (handle), addr,
+			       sizeof buffer, &buffer);
+        if (result < 0)
+                return -1;
+
+        compare = ntohl (buffer);
+	switch (mode) {
+	case RAW1394_MODIFY_ALLOC:
+		swap = compare - bandwidth;
+		if (swap < 0)
+			return -1;
+		break;
+
+	case RAW1394_MODIFY_FREE:
+		swap = compare + bandwidth;
+		if (swap > MAXIMUM_BANDWIDTH)
+			swap = MAXIMUM_BANDWIDTH;
+		break;
+
+	default:
+		return -1;
+	}
+
+	result = raw1394_lock(handle, raw1394_get_irm_id (handle), addr,
+			      RAW1394_EXTCODE_COMPARE_SWAP,
+			      htonl(swap), htonl(compare), &buffer);
+	if (result < 0 || ntohl(buffer) != compare)
+		return -1;
+  
+        return 0;
+}
+
+int
+fw_channel_modify (raw1394handle_t handle,
+			unsigned int channel,
+			enum raw1394_modify_mode mode)
+{
+        quadlet_t buffer, compare, swap, bit;
+        nodeaddr_t addr;
+        int result;
+        
+	if (channel >= 64)
+		return -1;
+	addr = CSR_REGISTER_BASE +
+		CSR_CHANNELS_AVAILABLE_HI + 4 * (channel / 32);
+	/* Read currently available channels from IRM. */
+        result = raw1394_read(handle, raw1394_get_irm_id (handle), addr, 
+			      sizeof buffer, &buffer);
+        if (result < 0)
+                return -1;
+        
+	/* IEEE numbers bits from MSB (0) to LSB (31). */
+        bit = 1 << (31 - (channel & 31));
+        compare = ntohl(buffer);
+	switch (mode) {
+	case RAW1394_MODIFY_ALLOC:
+                if ((compare & bit) == 0)
+                        return -1;
+                swap = buffer & ~bit;
+		break;
+
+        case RAW1394_MODIFY_FREE:
+                if ((buffer & bit) != 0)
+                        return -1;
+                swap = buffer | bit;
+		break;
+
+	default:
+		return -1;
+        }
+  
+        result = raw1394_lock (handle, raw1394_get_irm_id (handle), addr,
+			       RAW1394_EXTCODE_COMPARE_SWAP,
+			       htonl(swap), htonl(compare), &buffer);
+
+        if (result < 0 || ntohl(buffer) != compare)
+                return -1;
+  
+        return 0;
+}