Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1330 insertions, 0 deletions

diff --git a/drivers/ieee1394/ieee1394_core.c b/drivers/ieee1394/ieee1394_core.c
new file mode 100644
index 000000000000..1c5845f7e4ab
--- /dev/null
+++ b/drivers/ieee1394/ieee1394_core.c
@@ -0,0 +1,1330 @@
+/*
+ * IEEE 1394 for Linux
+ *
+ * Core support: hpsb_packet management, packet handling and forwarding to
+ *               highlevel or lowlevel code
+ *
+ * Copyright (C) 1999, 2000 Andreas E. Bombe
+ *                     2002 Manfred Weihs <weihs@ict.tuwien.ac.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>
+ *        loopback functionality in hpsb_send_packet
+ *        allow highlevel drivers to disable automatic response generation
+ *              and to generate responses themselves (deferred)
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/bitops.h>
+#include <linux/kdev_t.h>
+#include <linux/skbuff.h>
+#include <linux/suspend.h>
+
+#include <asm/byteorder.h>
+#include <asm/semaphore.h>
+
+#include "ieee1394_types.h"
+#include "ieee1394.h"
+#include "hosts.h"
+#include "ieee1394_core.h"
+#include "highlevel.h"
+#include "ieee1394_transactions.h"
+#include "csr.h"
+#include "nodemgr.h"
+#include "dma.h"
+#include "iso.h"
+#include "config_roms.h"
+
+/*
+ * Disable the nodemgr detection and config rom reading functionality.
+ */
+static int disable_nodemgr = 0;
+module_param(disable_nodemgr, int, 0444);
+MODULE_PARM_DESC(disable_nodemgr, "Disable nodemgr functionality.");
+
+/* Disable Isochronous Resource Manager functionality */
+int hpsb_disable_irm = 0;
+module_param_named(disable_irm, hpsb_disable_irm, bool, 0);
+MODULE_PARM_DESC(disable_irm,
+                 "Disable Isochronous Resource Manager functionality.");
+
+/* We are GPL, so treat us special */
+MODULE_LICENSE("GPL");
+
+/* Some globals used */
+const char *hpsb_speedto_str[] = { "S100", "S200", "S400", "S800", "S1600", "S3200" };
+struct class_simple *hpsb_protocol_class;
+
+#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
+static void dump_packet(const char *text, quadlet_t *data, int size)
+{
+        int i;
+
+        size /= 4;
+        size = (size > 4 ? 4 : size);
+
+        printk(KERN_DEBUG "ieee1394: %s", text);
+        for (i = 0; i < size; i++)
+                printk(" %08x", data[i]);
+        printk("\n");
+}
+#else
+#define dump_packet(x,y,z)
+#endif
+
+static void abort_requests(struct hpsb_host *host);
+static void queue_packet_complete(struct hpsb_packet *packet);
+
+
+/**
+ * hpsb_set_packet_complete_task - set the task that runs when a packet
+ * completes. You cannot call this more than once on a single packet
+ * before it is sent.
+ *
+ * @packet: the packet whose completion we want the task added to
+ * @routine: function to call
+ * @data: data (if any) to pass to the above function
+ */
+void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
+                                   void (*routine)(void *), void *data)
+{
+        WARN_ON(packet->complete_routine != NULL);
+        packet->complete_routine = routine;
+        packet->complete_data = data;
+        return;
+}
+
+/**
+ * hpsb_alloc_packet - allocate new packet structure
+ * @data_size: size of the data block to be allocated
+ *
+ * This function allocates, initializes and returns a new &struct hpsb_packet.
+ * It can be used in interrupt context.  A header block is always included, its
+ * size is big enough to contain all possible 1394 headers.  The data block is
+ * only allocated when @data_size is not zero.
+ *
+ * For packets for which responses will be received the @data_size has to be big
+ * enough to contain the response's data block since no further allocation
+ * occurs at response matching time.
+ *
+ * The packet's generation value will be set to the current generation number
+ * for ease of use.  Remember to overwrite it with your own recorded generation
+ * number if you can not be sure that your code will not race with a bus reset.
+ *
+ * Return value: A pointer to a &struct hpsb_packet or NULL on allocation
+ * failure.
+ */
+struct hpsb_packet *hpsb_alloc_packet(size_t data_size)
+{
+        struct hpsb_packet *packet = NULL;
+        struct sk_buff *skb;
+
+        data_size = ((data_size + 3) & ~3);
+
+        skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC);
+        if (skb == NULL)
+                return NULL;
+
+        memset(skb->data, 0, data_size + sizeof(*packet));
+
+        packet = (struct hpsb_packet *)skb->data;
+        packet->skb = skb;
+
+        packet->header = packet->embedded_header;
+        packet->state = hpsb_unused;
+        packet->generation = -1;
+        INIT_LIST_HEAD(&packet->driver_list);
+        atomic_set(&packet->refcnt, 1);
+
+        if (data_size) {
+                packet->data = (quadlet_t *)(skb->data + sizeof(*packet));
+                packet->data_size = data_size;
+        }
+
+        return packet;
+}
+
+
+/**
+ * hpsb_free_packet - free packet and data associated with it
+ * @packet: packet to free (is NULL safe)
+ *
+ * This function will free packet->data and finally the packet itself.
+ */
+void hpsb_free_packet(struct hpsb_packet *packet)
+{
+        if (packet && atomic_dec_and_test(&packet->refcnt)) {
+                BUG_ON(!list_empty(&packet->driver_list));
+                kfree_skb(packet->skb);
+        }
+}
+
+
+int hpsb_reset_bus(struct hpsb_host *host, int type)
+{
+        if (!host->in_bus_reset) {
+                host->driver->devctl(host, RESET_BUS, type);
+                return 0;
+        } else {
+                return 1;
+        }
+}
+
+
+int hpsb_bus_reset(struct hpsb_host *host)
+{
+        if (host->in_bus_reset) {
+                HPSB_NOTICE("%s called while bus reset already in progress",
+                            __FUNCTION__);
+                return 1;
+        }
+
+        abort_requests(host);
+        host->in_bus_reset = 1;
+        host->irm_id = -1;
+        host->is_irm = 0;
+        host->busmgr_id = -1;
+        host->is_busmgr = 0;
+        host->is_cycmst = 0;
+        host->node_count = 0;
+        host->selfid_count = 0;
+
+        return 0;
+}
+
+
+/*
+ * Verify num_of_selfids SelfIDs and return number of nodes.  Return zero in
+ * case verification failed.
+ */
+static int check_selfids(struct hpsb_host *host)
+{
+        int nodeid = -1;
+        int rest_of_selfids = host->selfid_count;
+        struct selfid *sid = (struct selfid *)host->topology_map;
+        struct ext_selfid *esid;
+        int esid_seq = 23;
+
+        host->nodes_active = 0;
+
+        while (rest_of_selfids--) {
+                if (!sid->extended) {
+                        nodeid++;
+                        esid_seq = 0;
+
+                        if (sid->phy_id != nodeid) {
+                                HPSB_INFO("SelfIDs failed monotony check with "
+                                          "%d", sid->phy_id);
+                                return 0;
+                        }
+
+                        if (sid->link_active) {
+                                host->nodes_active++;
+                                if (sid->contender)
+                                        host->irm_id = LOCAL_BUS | sid->phy_id;
+                        }
+                } else {
+                        esid = (struct ext_selfid *)sid;
+
+                        if ((esid->phy_id != nodeid)
+                            || (esid->seq_nr != esid_seq)) {
+                                HPSB_INFO("SelfIDs failed monotony check with "
+                                          "%d/%d", esid->phy_id, esid->seq_nr);
+                                return 0;
+                        }
+                        esid_seq++;
+                }
+                sid++;
+        }
+
+        esid = (struct ext_selfid *)(sid - 1);
+        while (esid->extended) {
+                if ((esid->porta == 0x2) || (esid->portb == 0x2)
+                    || (esid->portc == 0x2) || (esid->portd == 0x2)
+                    || (esid->porte == 0x2) || (esid->portf == 0x2)
+                    || (esid->portg == 0x2) || (esid->porth == 0x2)) {
+                        HPSB_INFO("SelfIDs failed root check on "
+                                  "extended SelfID");
+                        return 0;
+                }
+                esid--;
+        }
+
+        sid = (struct selfid *)esid;
+        if ((sid->port0 == 0x2) || (sid->port1 == 0x2) || (sid->port2 == 0x2)) {
+                HPSB_INFO("SelfIDs failed root check");
+                return 0;
+        }
+
+        host->node_count = nodeid + 1;
+        return 1;
+}
+
+static void build_speed_map(struct hpsb_host *host, int nodecount)
+{
+        u8 speedcap[nodecount];
+        u8 cldcnt[nodecount];
+        u8 *map = host->speed_map;
+        struct selfid *sid;
+        struct ext_selfid *esid;
+        int i, j, n;
+
+        for (i = 0; i < (nodecount * 64); i += 64) {
+                for (j = 0; j < nodecount; j++) {
+                        map[i+j] = IEEE1394_SPEED_MAX;
+                }
+        }
+
+        for (i = 0; i < nodecount; i++) {
+                cldcnt[i] = 0;
+        }
+
+        /* find direct children count and speed */
+        for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1],
+                     n = nodecount - 1;
+             (void *)sid >= (void *)host->topology_map; sid--) {
+                if (sid->extended) {
+                        esid = (struct ext_selfid *)sid;
+
+                        if (esid->porta == 0x3) cldcnt[n]++;
+                        if (esid->portb == 0x3) cldcnt[n]++;
+                        if (esid->portc == 0x3) cldcnt[n]++;
+                        if (esid->portd == 0x3) cldcnt[n]++;
+                        if (esid->porte == 0x3) cldcnt[n]++;
+                        if (esid->portf == 0x3) cldcnt[n]++;
+                        if (esid->portg == 0x3) cldcnt[n]++;
+                        if (esid->porth == 0x3) cldcnt[n]++;
+                } else {
+                        if (sid->port0 == 0x3) cldcnt[n]++;
+                        if (sid->port1 == 0x3) cldcnt[n]++;
+                        if (sid->port2 == 0x3) cldcnt[n]++;
+
+                        speedcap[n] = sid->speed;
+                        n--;
+                }
+        }
+
+        /* set self mapping */
+        for (i = 0; i < nodecount; i++) {
+                map[64*i + i] = speedcap[i];
+        }
+
+        /* fix up direct children count to total children count;
+         * also fix up speedcaps for sibling and parent communication */
+        for (i = 1; i < nodecount; i++) {
+                for (j = cldcnt[i], n = i - 1; j > 0; j--) {
+                        cldcnt[i] += cldcnt[n];
+                        speedcap[n] = min(speedcap[n], speedcap[i]);
+                        n -= cldcnt[n] + 1;
+                }
+        }
+
+        for (n = 0; n < nodecount; n++) {
+                for (i = n - cldcnt[n]; i <= n; i++) {
+                        for (j = 0; j < (n - cldcnt[n]); j++) {
+                                map[j*64 + i] = map[i*64 + j] =
+                                        min(map[i*64 + j], speedcap[n]);
+                        }
+                        for (j = n + 1; j < nodecount; j++) {
+                                map[j*64 + i] = map[i*64 + j] =
+                                        min(map[i*64 + j], speedcap[n]);
+                        }
+                }
+        }
+}
+
+
+void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid)
+{
+        if (host->in_bus_reset) {
+                HPSB_VERBOSE("Including SelfID 0x%x", sid);
+                host->topology_map[host->selfid_count++] = sid;
+        } else {
+                HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d",
+                            sid, NODEID_TO_BUS(host->node_id));
+        }
+}
+
+void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot)
+{
+        if (!host->in_bus_reset)
+                HPSB_NOTICE("SelfID completion called outside of bus reset!");
+
+        host->node_id = LOCAL_BUS | phyid;
+        host->is_root = isroot;
+
+        if (!check_selfids(host)) {
+                if (host->reset_retries++ < 20) {
+                        /* selfid stage did not complete without error */
+                        HPSB_NOTICE("Error in SelfID stage, resetting");
+                        host->in_bus_reset = 0;
+                        /* this should work from ohci1394 now... */
+                        hpsb_reset_bus(host, LONG_RESET);
+                        return;
+                } else {
+                        HPSB_NOTICE("Stopping out-of-control reset loop");
+                        HPSB_NOTICE("Warning - topology map and speed map will not be valid");
+                        host->reset_retries = 0;
+                }
+        } else {
+                host->reset_retries = 0;
+                build_speed_map(host, host->node_count);
+        }
+
+        HPSB_VERBOSE("selfid_complete called with successful SelfID stage "
+                     "... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id);
+
+        /* irm_id is kept up to date by check_selfids() */
+        if (host->irm_id == host->node_id) {
+                host->is_irm = 1;
+        } else {
+                host->is_busmgr = 0;
+                host->is_irm = 0;
+        }
+
+        if (isroot) {
+                host->driver->devctl(host, ACT_CYCLE_MASTER, 1);
+                host->is_cycmst = 1;
+        }
+        atomic_inc(&host->generation);
+        host->in_bus_reset = 0;
+        highlevel_host_reset(host);
+}
+
+
+void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
+                      int ackcode)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
+
+        packet->ack_code = ackcode;
+
+        if (packet->no_waiter || packet->state == hpsb_complete) {
+                /* if packet->no_waiter, must not have a tlabel allocated */
+                spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
+                hpsb_free_packet(packet);
+                return;
+        }
+
+        atomic_dec(&packet->refcnt);    /* drop HC's reference */
+        /* here the packet must be on the host->pending_packet_queue */
+
+        if (ackcode != ACK_PENDING || !packet->expect_response) {
+                packet->state = hpsb_complete;
+                __skb_unlink(packet->skb, &host->pending_packet_queue);
+                spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
+                queue_packet_complete(packet);
+                return;
+        }
+
+        packet->state = hpsb_pending;
+        packet->sendtime = jiffies;
+
+        spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
+
+        mod_timer(&host->timeout, jiffies + host->timeout_interval);
+}
+
+/**
+ * hpsb_send_phy_config - transmit a PHY configuration packet on the bus
+ * @host: host that PHY config packet gets sent through
+ * @rootid: root whose force_root bit should get set (-1 = don't set force_root)
+ * @gapcnt: gap count value to set (-1 = don't set gap count)
+ *
+ * This function sends a PHY config packet on the bus through the specified host.
+ *
+ * Return value: 0 for success or error number otherwise.
+ */
+int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt)
+{
+        struct hpsb_packet *packet;
+        int retval = 0;
+
+        if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 ||
+           (rootid == -1 && gapcnt == -1)) {
+                HPSB_DEBUG("Invalid Parameter: rootid = %d   gapcnt = %d",
+                           rootid, gapcnt);
+                return -EINVAL;
+        }
+
+        packet = hpsb_alloc_packet(0);
+        if (!packet)
+                return -ENOMEM;
+
+        packet->host = host;
+        packet->header_size = 8;
+        packet->data_size = 0;
+        packet->expect_response = 0;
+        packet->no_waiter = 0;
+        packet->type = hpsb_raw;
+        packet->header[0] = 0;
+        if (rootid != -1)
+                packet->header[0] |= rootid << 24 | 1 << 23;
+        if (gapcnt != -1)
+                packet->header[0] |= gapcnt << 16 | 1 << 22;
+
+        packet->header[1] = ~packet->header[0];
+
+        packet->generation = get_hpsb_generation(host);
+
+        retval = hpsb_send_packet_and_wait(packet);
+        hpsb_free_packet(packet);
+
+        return retval;
+}
+
+/**
+ * hpsb_send_packet - transmit a packet on the bus
+ * @packet: packet to send
+ *
+ * The packet is sent through the host specified in the packet->host field.
+ * Before sending, the packet's transmit speed is automatically determined
+ * using the local speed map when it is an async, non-broadcast packet.
+ *
+ * Possibilities for failure are that host is either not initialized, in bus
+ * reset, the packet's generation number doesn't match the current generation
+ * number or the host reports a transmit error.
+ *
+ * Return value: 0 on success, negative errno on failure.
+ */
+int hpsb_send_packet(struct hpsb_packet *packet)
+{
+        struct hpsb_host *host = packet->host;
+
+        if (host->is_shutdown)
+                return -EINVAL;
+        if (host->in_bus_reset ||
+            (packet->generation != get_hpsb_generation(host)))
+                return -EAGAIN;
+
+        packet->state = hpsb_queued;
+
+        /* This just seems silly to me */
+        WARN_ON(packet->no_waiter && packet->expect_response);
+
+        if (!packet->no_waiter || packet->expect_response) {
+                atomic_inc(&packet->refcnt);
+                packet->sendtime = jiffies;
+                skb_queue_tail(&host->pending_packet_queue, packet->skb);
+        }
+
+        if (packet->node_id == host->node_id) {
+                /* it is a local request, so handle it locally */
+
+                quadlet_t *data;
+                size_t size = packet->data_size + packet->header_size;
+
+                data = kmalloc(size, GFP_ATOMIC);
+                if (!data) {
+                        HPSB_ERR("unable to allocate memory for concatenating header and data");
+                        return -ENOMEM;
+                }
+
+                memcpy(data, packet->header, packet->header_size);
+
+                if (packet->data_size)
+                        memcpy(((u8*)data) + packet->header_size, packet->data, packet->data_size);
+
+                dump_packet("send packet local:", packet->header,
+                            packet->header_size);
+
+                hpsb_packet_sent(host, packet, packet->expect_response ? ACK_PENDING : ACK_COMPLETE);
+                hpsb_packet_received(host, data, size, 0);
+
+                kfree(data);
+
+                return 0;
+        }
+
+        if (packet->type == hpsb_async && packet->node_id != ALL_NODES) {
+                packet->speed_code =
+                        host->speed_map[NODEID_TO_NODE(host->node_id) * 64
+                                       + NODEID_TO_NODE(packet->node_id)];
+        }
+
+#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
+        switch (packet->speed_code) {
+        case 2:
+                dump_packet("send packet 400:", packet->header,
+                            packet->header_size);
+                break;
+        case 1:
+                dump_packet("send packet 200:", packet->header,
+                            packet->header_size);
+                break;
+        default:
+                dump_packet("send packet 100:", packet->header,
+                            packet->header_size);
+        }
+#endif
+
+        return host->driver->transmit_packet(host, packet);
+}
+
+/* We could just use complete() directly as the packet complete
+ * callback, but this is more typesafe, in the sense that we get a
+ * compiler error if the prototype for complete() changes. */
+
+static void complete_packet(void *data)
+{
+        complete((struct completion *) data);
+}
+
+int hpsb_send_packet_and_wait(struct hpsb_packet *packet)
+{
+        struct completion done;
+        int retval;
+
+        init_completion(&done);
+        hpsb_set_packet_complete_task(packet, complete_packet, &done);
+        retval = hpsb_send_packet(packet);
+        if (retval == 0)
+                wait_for_completion(&done);
+
+        return retval;
+}
+
+static void send_packet_nocare(struct hpsb_packet *packet)
+{
+        if (hpsb_send_packet(packet) < 0) {
+                hpsb_free_packet(packet);
+        }
+}
+
+
+static void handle_packet_response(struct hpsb_host *host, int tcode,
+                                   quadlet_t *data, size_t size)
+{
+        struct hpsb_packet *packet = NULL;
+        struct sk_buff *skb;
+        int tcode_match = 0;
+        int tlabel;
+        unsigned long flags;
+
+        tlabel = (data[0] >> 10) & 0x3f;
+
+        spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
+
+        skb_queue_walk(&host->pending_packet_queue, skb) {
+                packet = (struct hpsb_packet *)skb->data;
+                if ((packet->tlabel == tlabel)
+                    && (packet->node_id == (data[1] >> 16))){
+                        break;
+                }
+
+                packet = NULL;
+        }
+
+        if (packet == NULL) {
+                HPSB_DEBUG("unsolicited response packet received - no tlabel match");
+                dump_packet("contents:", data, 16);
+                spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
+                return;
+        }
+
+        switch (packet->tcode) {
+        case TCODE_WRITEQ:
+        case TCODE_WRITEB:
+                if (tcode != TCODE_WRITE_RESPONSE)
+                        break;
+                tcode_match = 1;
+                memcpy(packet->header, data, 12);
+                break;
+        case TCODE_READQ:
+                if (tcode != TCODE_READQ_RESPONSE)
+                        break;
+                tcode_match = 1;
+                memcpy(packet->header, data, 16);
+                break;
+        case TCODE_READB:
+                if (tcode != TCODE_READB_RESPONSE)
+                        break;
+                tcode_match = 1;
+                BUG_ON(packet->skb->len - sizeof(*packet) < size - 16);
+                memcpy(packet->header, data, 16);
+                memcpy(packet->data, data + 4, size - 16);
+                break;
+        case TCODE_LOCK_REQUEST:
+                if (tcode != TCODE_LOCK_RESPONSE)
+                        break;
+                tcode_match = 1;
+                size = min((size - 16), (size_t)8);
+                BUG_ON(packet->skb->len - sizeof(*packet) < size);
+                memcpy(packet->header, data, 16);
+                memcpy(packet->data, data + 4, size);
+                break;
+        }
+
+        if (!tcode_match) {
+                spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
+                HPSB_INFO("unsolicited response packet received - tcode mismatch");
+                dump_packet("contents:", data, 16);
+                return;
+        }
+
+        __skb_unlink(skb, skb->list);
+
+        if (packet->state == hpsb_queued) {
+                packet->sendtime = jiffies;
+                packet->ack_code = ACK_PENDING;
+        }
+
+        packet->state = hpsb_complete;
+        spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
+
+        queue_packet_complete(packet);
+}
+
+
+static struct hpsb_packet *create_reply_packet(struct hpsb_host *host,
+                                               quadlet_t *data, size_t dsize)
+{
+        struct hpsb_packet *p;
+
+        p = hpsb_alloc_packet(dsize);
+        if (unlikely(p == NULL)) {
+                /* FIXME - send data_error response */
+                return NULL;
+        }
+
+        p->type = hpsb_async;
+        p->state = hpsb_unused;
+        p->host = host;
+        p->node_id = data[1] >> 16;
+        p->tlabel = (data[0] >> 10) & 0x3f;
+        p->no_waiter = 1;
+
+        p->generation = get_hpsb_generation(host);
+
+        if (dsize % 4)
+                p->data[dsize / 4] = 0;
+
+        return p;
+}
+
+#define PREP_ASYNC_HEAD_RCODE(tc) \
+        packet->tcode = tc; \
+        packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \
+                | (1 << 8) | (tc << 4); \
+        packet->header[1] = (packet->host->node_id << 16) | (rcode << 12); \
+        packet->header[2] = 0
+
+static void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode,
+                              quadlet_t data)
+{
+        PREP_ASYNC_HEAD_RCODE(TCODE_READQ_RESPONSE);
+        packet->header[3] = data;
+        packet->header_size = 16;
+        packet->data_size = 0;
+}
+
+static void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode,
+                               int length)
+{
+        if (rcode != RCODE_COMPLETE)
+                length = 0;
+
+        PREP_ASYNC_HEAD_RCODE(TCODE_READB_RESPONSE);
+        packet->header[3] = length << 16;
+        packet->header_size = 16;
+        packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
+}
+
+static void fill_async_write_resp(struct hpsb_packet *packet, int rcode)
+{
+        PREP_ASYNC_HEAD_RCODE(TCODE_WRITE_RESPONSE);
+        packet->header[2] = 0;
+        packet->header_size = 12;
+        packet->data_size = 0;
+}
+
+static void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode,
+                          int length)
+{
+        if (rcode != RCODE_COMPLETE)
+                length = 0;
+
+        PREP_ASYNC_HEAD_RCODE(TCODE_LOCK_RESPONSE);
+        packet->header[3] = (length << 16) | extcode;
+        packet->header_size = 16;
+        packet->data_size = length;
+}
+
+#define PREP_REPLY_PACKET(length) \
+                packet = create_reply_packet(host, data, length); \
+                if (packet == NULL) break
+
+static void handle_incoming_packet(struct hpsb_host *host, int tcode,
+                                   quadlet_t *data, size_t size, int write_acked)
+{
+        struct hpsb_packet *packet;
+        int length, rcode, extcode;
+        quadlet_t buffer;
+        nodeid_t source = data[1] >> 16;
+        nodeid_t dest = data[0] >> 16;
+        u16 flags = (u16) data[0];
+        u64 addr;
+
+        /* big FIXME - no error checking is done for an out of bounds length */
+
+        switch (tcode) {
+        case TCODE_WRITEQ:
+                addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
+                rcode = highlevel_write(host, source, dest, data+3,
+                                        addr, 4, flags);
+
+                if (!write_acked
+                    && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
+                    && (rcode >= 0)) {
+                        /* not a broadcast write, reply */
+                        PREP_REPLY_PACKET(0);
+                        fill_async_write_resp(packet, rcode);
+                        send_packet_nocare(packet);
+                }
+                break;
+
+        case TCODE_WRITEB:
+                addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
+                rcode = highlevel_write(host, source, dest, data+4,
+                                        addr, data[3]>>16, flags);
+
+                if (!write_acked
+                    && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
+                    && (rcode >= 0)) {
+                        /* not a broadcast write, reply */
+                        PREP_REPLY_PACKET(0);
+                        fill_async_write_resp(packet, rcode);
+                        send_packet_nocare(packet);
+                }
+                break;
+
+        case TCODE_READQ:
+                addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
+                rcode = highlevel_read(host, source, &buffer, addr, 4, flags);
+
+                if (rcode >= 0) {
+                        PREP_REPLY_PACKET(0);
+                        fill_async_readquad_resp(packet, rcode, buffer);
+                        send_packet_nocare(packet);
+                }
+                break;
+
+        case TCODE_READB:
+                length = data[3] >> 16;
+                PREP_REPLY_PACKET(length);
+
+                addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
+                rcode = highlevel_read(host, source, packet->data, addr,
+                                       length, flags);
+
+                if (rcode >= 0) {
+                        fill_async_readblock_resp(packet, rcode, length);
+                        send_packet_nocare(packet);
+                } else {
+                        hpsb_free_packet(packet);
+                }
+                break;
+
+        case TCODE_LOCK_REQUEST:
+                length = data[3] >> 16;
+                extcode = data[3] & 0xffff;
+                addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
+
+                PREP_REPLY_PACKET(8);
+
+                if ((extcode == 0) || (extcode >= 7)) {
+                        /* let switch default handle error */
+                        length = 0;
+                }
+
+                switch (length) {
+                case 4:
+                        rcode = highlevel_lock(host, source, packet->data, addr,
+                                               data[4], 0, extcode,flags);
+                        fill_async_lock_resp(packet, rcode, extcode, 4);
+                        break;
+                case 8:
+                        if ((extcode != EXTCODE_FETCH_ADD)
+                            && (extcode != EXTCODE_LITTLE_ADD)) {
+                                rcode = highlevel_lock(host, source,
+                                                       packet->data, addr,
+                                                       data[5], data[4],
+                                                       extcode, flags);
+                                fill_async_lock_resp(packet, rcode, extcode, 4);
+                        } else {
+                                rcode = highlevel_lock64(host, source,
+                                             (octlet_t *)packet->data, addr,
+                                             *(octlet_t *)(data + 4), 0ULL,
+                                             extcode, flags);
+                                fill_async_lock_resp(packet, rcode, extcode, 8);
+                        }
+                        break;
+                case 16:
+                        rcode = highlevel_lock64(host, source,
+                                                 (octlet_t *)packet->data, addr,
+                                                 *(octlet_t *)(data + 6),
+                                                 *(octlet_t *)(data + 4),
+                                                 extcode, flags);
+                        fill_async_lock_resp(packet, rcode, extcode, 8);
+                        break;
+                default:
+                        rcode = RCODE_TYPE_ERROR;
+                        fill_async_lock_resp(packet, rcode,
+                                             extcode, 0);
+                }
+
+                if (rcode >= 0) {
+                        send_packet_nocare(packet);
+                } else {
+                        hpsb_free_packet(packet);
+                }
+                break;
+        }
+
+}
+#undef PREP_REPLY_PACKET
+
+
+void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
+                          int write_acked)
+{
+        int tcode;
+
+        if (host->in_bus_reset) {
+                HPSB_INFO("received packet during reset; ignoring");
+                return;
+        }
+
+        dump_packet("received packet:", data, size);
+
+        tcode = (data[0] >> 4) & 0xf;
+
+        switch (tcode) {
+        case TCODE_WRITE_RESPONSE:
+        case TCODE_READQ_RESPONSE:
+        case TCODE_READB_RESPONSE:
+        case TCODE_LOCK_RESPONSE:
+                handle_packet_response(host, tcode, data, size);
+                break;
+
+        case TCODE_WRITEQ:
+        case TCODE_WRITEB:
+        case TCODE_READQ:
+        case TCODE_READB:
+        case TCODE_LOCK_REQUEST:
+                handle_incoming_packet(host, tcode, data, size, write_acked);
+                break;
+
+
+        case TCODE_ISO_DATA:
+                highlevel_iso_receive(host, data, size);
+                break;
+
+        case TCODE_CYCLE_START:
+                /* simply ignore this packet if it is passed on */
+                break;
+
+        default:
+                HPSB_NOTICE("received packet with bogus transaction code %d",
+                            tcode);
+                break;
+        }
+}
+
+
+static void abort_requests(struct hpsb_host *host)
+{
+        struct hpsb_packet *packet;
+        struct sk_buff *skb;
+
+        host->driver->devctl(host, CANCEL_REQUESTS, 0);
+
+        while ((skb = skb_dequeue(&host->pending_packet_queue)) != NULL) {
+                packet = (struct hpsb_packet *)skb->data;
+
+                packet->state = hpsb_complete;
+                packet->ack_code = ACKX_ABORTED;
+                queue_packet_complete(packet);
+        }
+}
+
+void abort_timedouts(unsigned long __opaque)
+{
+        struct hpsb_host *host = (struct hpsb_host *)__opaque;
+        unsigned long flags;
+        struct hpsb_packet *packet;
+        struct sk_buff *skb;
+        unsigned long expire;
+
+        spin_lock_irqsave(&host->csr.lock, flags);
+        expire = host->csr.expire;
+        spin_unlock_irqrestore(&host->csr.lock, flags);
+
+        /* Hold the lock around this, since we aren't dequeuing all
+         * packets, just ones we need. */
+        spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
+
+        while (!skb_queue_empty(&host->pending_packet_queue)) {
+                skb = skb_peek(&host->pending_packet_queue);
+
+                packet = (struct hpsb_packet *)skb->data;
+
+                if (time_before(packet->sendtime + expire, jiffies)) {
+                        __skb_unlink(skb, skb->list);
+                        packet->state = hpsb_complete;
+                        packet->ack_code = ACKX_TIMEOUT;
+                        queue_packet_complete(packet);
+                } else {
+                        /* Since packets are added to the tail, the oldest
+                         * ones are first, always. When we get to one that
+                         * isn't timed out, the rest aren't either. */
+                        break;
+                }
+        }
+
+        if (!skb_queue_empty(&host->pending_packet_queue))
+                mod_timer(&host->timeout, jiffies + host->timeout_interval);
+
+        spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
+}
+
+
+/* Kernel thread and vars, which handles packets that are completed. Only
+ * packets that have a "complete" function are sent here. This way, the
+ * completion is run out of kernel context, and doesn't block the rest of
+ * the stack. */
+static int khpsbpkt_pid = -1, khpsbpkt_kill;
+static DECLARE_COMPLETION(khpsbpkt_complete);
+static struct sk_buff_head hpsbpkt_queue;
+static DECLARE_MUTEX_LOCKED(khpsbpkt_sig);
+
+
+static void queue_packet_complete(struct hpsb_packet *packet)
+{
+        if (packet->no_waiter) {
+                hpsb_free_packet(packet);
+                return;
+        }
+        if (packet->complete_routine != NULL) {
+                skb_queue_tail(&hpsbpkt_queue, packet->skb);
+
+                /* Signal the kernel thread to handle this */
+                up(&khpsbpkt_sig);
+        }
+        return;
+}
+
+static int hpsbpkt_thread(void *__hi)
+{
+        struct sk_buff *skb;
+        struct hpsb_packet *packet;
+        void (*complete_routine)(void*);
+        void *complete_data;
+
+        daemonize("khpsbpkt");
+
+        while (1) {
+                if (down_interruptible(&khpsbpkt_sig)) {
+                        if (current->flags & PF_FREEZE) {
+                                refrigerator(0);
+                                continue;
+                        }
+                        printk("khpsbpkt: received unexpected signal?!\n" );
+                        break;
+                }
+
+                if (khpsbpkt_kill)
+                        break;
+
+                while ((skb = skb_dequeue(&hpsbpkt_queue)) != NULL) {
+                        packet = (struct hpsb_packet *)skb->data;
+
+                        complete_routine = packet->complete_routine;
+                        complete_data = packet->complete_data;
+
+                        packet->complete_routine = packet->complete_data = NULL;
+
+                        complete_routine(complete_data);
+                }
+        }
+
+        complete_and_exit(&khpsbpkt_complete, 0);
+}
+
+static int __init ieee1394_init(void)
+{
+        int i, ret;
+
+        skb_queue_head_init(&hpsbpkt_queue);
+
+        /* non-fatal error */
+        if (hpsb_init_config_roms()) {
+                HPSB_ERR("Failed to initialize some config rom entries.\n");
+                HPSB_ERR("Some features may not be available\n");
+        }
+
+        khpsbpkt_pid = kernel_thread(hpsbpkt_thread, NULL, CLONE_KERNEL);
+        if (khpsbpkt_pid < 0) {
+                HPSB_ERR("Failed to start hpsbpkt thread!\n");
+                ret = -ENOMEM;
+                goto exit_cleanup_config_roms;
+        }
+
+        if (register_chrdev_region(IEEE1394_CORE_DEV, 256, "ieee1394")) {
+                HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR);
+                ret = -ENODEV;
+                goto exit_release_kernel_thread;
+        }
+
+        /* actually this is a non-fatal error */
+        ret = devfs_mk_dir("ieee1394");
+        if (ret < 0) {
+                HPSB_ERR("unable to make devfs dir for device major %d!\n", IEEE1394_MAJOR);
+                goto release_chrdev;
+        }
+
+        ret = bus_register(&ieee1394_bus_type);
+        if (ret < 0) {
+                HPSB_INFO("bus register failed");
+                goto release_devfs;
+        }
+
+        for (i = 0; fw_bus_attrs[i]; i++) {
+                ret = bus_create_file(&ieee1394_bus_type, fw_bus_attrs[i]);
+                if (ret < 0) {
+                        while (i >= 0) {
+                                bus_remove_file(&ieee1394_bus_type,
+                                                fw_bus_attrs[i--]);
+                        }
+                        bus_unregister(&ieee1394_bus_type);
+                        goto release_devfs;
+                }
+        }
+
+        ret = class_register(&hpsb_host_class);
+        if (ret < 0)
+                goto release_all_bus;
+
+        hpsb_protocol_class = class_simple_create(THIS_MODULE, "ieee1394_protocol");
+        if (IS_ERR(hpsb_protocol_class)) {
+                ret = PTR_ERR(hpsb_protocol_class);
+                goto release_class_host;
+        }
+
+        ret = init_csr();
+        if (ret) {
+                HPSB_INFO("init csr failed");
+                ret = -ENOMEM;
+                goto release_class_protocol;
+        }
+
+        if (disable_nodemgr) {
+                HPSB_INFO("nodemgr and IRM functionality disabled");
+                /* We shouldn't contend for IRM with nodemgr disabled, since
+                   nodemgr implements functionality required of ieee1394a-2000
+                   IRMs */
+                hpsb_disable_irm = 1;
+                      
+                return 0;
+        }
+
+        if (hpsb_disable_irm) {
+                HPSB_INFO("IRM functionality disabled");
+        }
+
+        ret = init_ieee1394_nodemgr();
+        if (ret < 0) {
+                HPSB_INFO("init nodemgr failed");
+                goto cleanup_csr;
+        }
+
+        return 0;
+
+cleanup_csr:
+        cleanup_csr();
+release_class_protocol:
+        class_simple_destroy(hpsb_protocol_class);
+release_class_host:
+        class_unregister(&hpsb_host_class);
+release_all_bus:
+        for (i = 0; fw_bus_attrs[i]; i++)
+                bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
+        bus_unregister(&ieee1394_bus_type);
+release_devfs:
+        devfs_remove("ieee1394");
+release_chrdev:
+        unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
+exit_release_kernel_thread:
+        if (khpsbpkt_pid >= 0) {
+                kill_proc(khpsbpkt_pid, SIGTERM, 1);
+                wait_for_completion(&khpsbpkt_complete);
+        }
+exit_cleanup_config_roms:
+        hpsb_cleanup_config_roms();
+        return ret;
+}
+
+static void __exit ieee1394_cleanup(void)
+{
+        int i;
+
+        if (!disable_nodemgr)
+                cleanup_ieee1394_nodemgr();
+
+        cleanup_csr();
+
+        class_simple_destroy(hpsb_protocol_class);
+        class_unregister(&hpsb_host_class);
+        for (i = 0; fw_bus_attrs[i]; i++)
+                bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
+        bus_unregister(&ieee1394_bus_type);
+
+        if (khpsbpkt_pid >= 0) {
+                khpsbpkt_kill = 1;
+                mb();
+                up(&khpsbpkt_sig);
+                wait_for_completion(&khpsbpkt_complete);
+        }
+
+        hpsb_cleanup_config_roms();
+
+        unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
+        devfs_remove("ieee1394");
+}
+
+module_init(ieee1394_init);
+module_exit(ieee1394_cleanup);
+
+/* Exported symbols */
+
+/** hosts.c **/
+EXPORT_SYMBOL(hpsb_alloc_host);
+EXPORT_SYMBOL(hpsb_add_host);
+EXPORT_SYMBOL(hpsb_remove_host);
+EXPORT_SYMBOL(hpsb_update_config_rom_image);
+
+/** ieee1394_core.c **/
+EXPORT_SYMBOL(hpsb_speedto_str);
+EXPORT_SYMBOL(hpsb_protocol_class);
+EXPORT_SYMBOL(hpsb_set_packet_complete_task);
+EXPORT_SYMBOL(hpsb_alloc_packet);
+EXPORT_SYMBOL(hpsb_free_packet);
+EXPORT_SYMBOL(hpsb_send_phy_config);
+EXPORT_SYMBOL(hpsb_send_packet);
+EXPORT_SYMBOL(hpsb_send_packet_and_wait);
+EXPORT_SYMBOL(hpsb_reset_bus);
+EXPORT_SYMBOL(hpsb_bus_reset);
+EXPORT_SYMBOL(hpsb_selfid_received);
+EXPORT_SYMBOL(hpsb_selfid_complete);
+EXPORT_SYMBOL(hpsb_packet_sent);
+EXPORT_SYMBOL(hpsb_packet_received);
+EXPORT_SYMBOL_GPL(hpsb_disable_irm);
+
+/** ieee1394_transactions.c **/
+EXPORT_SYMBOL(hpsb_get_tlabel);
+EXPORT_SYMBOL(hpsb_free_tlabel);
+EXPORT_SYMBOL(hpsb_make_readpacket);
+EXPORT_SYMBOL(hpsb_make_writepacket);
+EXPORT_SYMBOL(hpsb_make_streampacket);
+EXPORT_SYMBOL(hpsb_make_lockpacket);
+EXPORT_SYMBOL(hpsb_make_lock64packet);
+EXPORT_SYMBOL(hpsb_make_phypacket);
+EXPORT_SYMBOL(hpsb_make_isopacket);
+EXPORT_SYMBOL(hpsb_read);
+EXPORT_SYMBOL(hpsb_write);
+EXPORT_SYMBOL(hpsb_lock);
+EXPORT_SYMBOL(hpsb_packet_success);
+
+/** highlevel.c **/
+EXPORT_SYMBOL(hpsb_register_highlevel);
+EXPORT_SYMBOL(hpsb_unregister_highlevel);
+EXPORT_SYMBOL(hpsb_register_addrspace);
+EXPORT_SYMBOL(hpsb_unregister_addrspace);
+EXPORT_SYMBOL(hpsb_allocate_and_register_addrspace);
+EXPORT_SYMBOL(hpsb_listen_channel);
+EXPORT_SYMBOL(hpsb_unlisten_channel);
+EXPORT_SYMBOL(hpsb_get_hostinfo);
+EXPORT_SYMBOL(hpsb_create_hostinfo);
+EXPORT_SYMBOL(hpsb_destroy_hostinfo);
+EXPORT_SYMBOL(hpsb_set_hostinfo_key);
+EXPORT_SYMBOL(hpsb_get_hostinfo_bykey);
+EXPORT_SYMBOL(hpsb_set_hostinfo);
+EXPORT_SYMBOL(highlevel_add_host);
+EXPORT_SYMBOL(highlevel_remove_host);
+EXPORT_SYMBOL(highlevel_host_reset);
+
+/** nodemgr.c **/
+EXPORT_SYMBOL(hpsb_node_fill_packet);
+EXPORT_SYMBOL(hpsb_node_write);
+EXPORT_SYMBOL(hpsb_register_protocol);
+EXPORT_SYMBOL(hpsb_unregister_protocol);
+EXPORT_SYMBOL(ieee1394_bus_type);
+EXPORT_SYMBOL(nodemgr_for_each_host);
+
+/** csr.c **/
+EXPORT_SYMBOL(hpsb_update_config_rom);
+
+/** dma.c **/
+EXPORT_SYMBOL(dma_prog_region_init);
+EXPORT_SYMBOL(dma_prog_region_alloc);
+EXPORT_SYMBOL(dma_prog_region_free);
+EXPORT_SYMBOL(dma_region_init);
+EXPORT_SYMBOL(dma_region_alloc);
+EXPORT_SYMBOL(dma_region_free);
+EXPORT_SYMBOL(dma_region_sync_for_cpu);
+EXPORT_SYMBOL(dma_region_sync_for_device);
+EXPORT_SYMBOL(dma_region_mmap);
+EXPORT_SYMBOL(dma_region_offset_to_bus);
+
+/** iso.c **/
+EXPORT_SYMBOL(hpsb_iso_xmit_init);
+EXPORT_SYMBOL(hpsb_iso_recv_init);
+EXPORT_SYMBOL(hpsb_iso_xmit_start);
+EXPORT_SYMBOL(hpsb_iso_recv_start);
+EXPORT_SYMBOL(hpsb_iso_recv_listen_channel);
+EXPORT_SYMBOL(hpsb_iso_recv_unlisten_channel);
+EXPORT_SYMBOL(hpsb_iso_recv_set_channel_mask);
+EXPORT_SYMBOL(hpsb_iso_stop);
+EXPORT_SYMBOL(hpsb_iso_shutdown);
+EXPORT_SYMBOL(hpsb_iso_xmit_queue_packet);
+EXPORT_SYMBOL(hpsb_iso_xmit_sync);
+EXPORT_SYMBOL(hpsb_iso_recv_release_packets);
+EXPORT_SYMBOL(hpsb_iso_n_ready);
+EXPORT_SYMBOL(hpsb_iso_packet_sent);
+EXPORT_SYMBOL(hpsb_iso_packet_received);
+EXPORT_SYMBOL(hpsb_iso_wake);
+EXPORT_SYMBOL(hpsb_iso_recv_flush);
+
+/** csr1212.c **/
+EXPORT_SYMBOL(csr1212_create_csr);
+EXPORT_SYMBOL(csr1212_init_local_csr);
+EXPORT_SYMBOL(csr1212_new_immediate);
+EXPORT_SYMBOL(csr1212_new_directory);
+EXPORT_SYMBOL(csr1212_associate_keyval);
+EXPORT_SYMBOL(csr1212_attach_keyval_to_directory);
+EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf);
+EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
+EXPORT_SYMBOL(csr1212_release_keyval);
+EXPORT_SYMBOL(csr1212_destroy_csr);
+EXPORT_SYMBOL(csr1212_read);
+EXPORT_SYMBOL(csr1212_generate_csr_image);
+EXPORT_SYMBOL(csr1212_parse_keyval);
+EXPORT_SYMBOL(csr1212_parse_csr);
+EXPORT_SYMBOL(_csr1212_read_keyval);
+EXPORT_SYMBOL(_csr1212_destroy_keyval);