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path: root/drivers/ieee1394/ieee1394_core.c
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Diffstat (limited to 'drivers/ieee1394/ieee1394_core.c')
-rw-r--r--drivers/ieee1394/ieee1394_core.c1380
1 files changed, 0 insertions, 1380 deletions
diff --git a/drivers/ieee1394/ieee1394_core.c b/drivers/ieee1394/ieee1394_core.c
deleted file mode 100644
index 87233800372..00000000000
--- a/drivers/ieee1394/ieee1394_core.c
+++ /dev/null
@@ -1,1380 +0,0 @@
-/*
- * 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/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/freezer.h>
-#include <linux/suspend.h>
-#include <linux/kthread.h>
-#include <linux/preempt.h>
-#include <linux/time.h>
-
-#include <asm/system.h>
-#include <asm/byteorder.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;
-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, 0444);
-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 *hpsb_protocol_class;
-
-#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
-static void dump_packet(const char *text, quadlet_t *data, int size, int speed)
-{
- int i;
-
- size /= 4;
- size = (size > 4 ? 4 : size);
-
- printk(KERN_DEBUG "ieee1394: %s", text);
- if (speed > -1 && speed < 6)
- printk(" at %s", hpsb_speedto_str[speed]);
- printk(":");
- for (i = 0; i < size; i++)
- printk(" %08x", data[i]);
- printk("\n");
-}
-#else
-#define dump_packet(a,b,c,d) do {} while (0)
-#endif
-
-static void abort_requests(struct hpsb_host *host);
-static void queue_packet_complete(struct hpsb_packet *packet);
-
-
-/**
- * hpsb_set_packet_complete_task - set task that runs when a packet completes
- * @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
- *
- * Set the task that runs when a packet completes. You cannot call this more
- * than once on a single packet before it is sent.
- *
- * Typically, the complete @routine is responsible to call hpsb_free_packet().
- */
-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, in bytes
- *
- * This function allocates, initializes and returns a new &struct hpsb_packet.
- * It can be used in interrupt context. A header block is always included and
- * initialized with zeros. Its size is big enough to contain all possible 1394
- * headers. The data block is only allocated if @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;
-
- data_size = ((data_size + 3) & ~3);
-
- packet = kzalloc(sizeof(*packet) + data_size, GFP_ATOMIC);
- if (!packet)
- return NULL;
-
- packet->state = hpsb_unused;
- packet->generation = -1;
- INIT_LIST_HEAD(&packet->driver_list);
- INIT_LIST_HEAD(&packet->queue);
- atomic_set(&packet->refcnt, 1);
-
- if (data_size) {
- packet->data = packet->embedded_data;
- packet->allocated_data_size = data_size;
- }
- return packet;
-}
-
-/**
- * hpsb_free_packet - free packet and data associated with it
- * @packet: packet to free (is NULL safe)
- *
- * Frees @packet->data only if it was allocated through hpsb_alloc_packet().
- */
-void hpsb_free_packet(struct hpsb_packet *packet)
-{
- if (packet && atomic_dec_and_test(&packet->refcnt)) {
- BUG_ON(!list_empty(&packet->driver_list) ||
- !list_empty(&packet->queue));
- kfree(packet);
- }
-}
-
-/**
- * hpsb_reset_bus - initiate bus reset on the given host
- * @host: host controller whose bus to reset
- * @type: one of enum reset_types
- *
- * Returns 1 if bus reset already in progress, 0 otherwise.
- */
-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;
- }
-}
-
-/**
- * hpsb_read_cycle_timer - read cycle timer register and system time
- * @host: host whose isochronous cycle timer register is read
- * @cycle_timer: address of bitfield to return the register contents
- * @local_time: address to return the system time
- *
- * The format of * @cycle_timer, is described in OHCI 1.1 clause 5.13. This
- * format is also read from non-OHCI controllers. * @local_time contains the
- * system time in microseconds since the Epoch, read at the moment when the
- * cycle timer was read.
- *
- * Return value: 0 for success or error number otherwise.
- */
-int hpsb_read_cycle_timer(struct hpsb_host *host, u32 *cycle_timer,
- u64 *local_time)
-{
- int ctr;
- struct timeval tv;
- unsigned long flags;
-
- if (!host || !cycle_timer || !local_time)
- return -EINVAL;
-
- preempt_disable();
- local_irq_save(flags);
-
- ctr = host->driver->devctl(host, GET_CYCLE_COUNTER, 0);
- if (ctr)
- do_gettimeofday(&tv);
-
- local_irq_restore(flags);
- preempt_enable();
-
- if (!ctr)
- return -EIO;
- *cycle_timer = ctr;
- *local_time = tv.tv_sec * 1000000ULL + tv.tv_usec;
- return 0;
-}
-
-/**
- * hpsb_bus_reset - notify a bus reset to the core
- *
- * For host driver module usage. Safe to use in interrupt context, although
- * quite complex; so you may want to run it in the bottom rather than top half.
- *
- * Returns 1 if bus reset already in progress, 0 otherwise.
- */
-int hpsb_bus_reset(struct hpsb_host *host)
-{
- if (host->in_bus_reset) {
- HPSB_NOTICE("%s called while bus reset already in progress",
- __func__);
- 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 == SELFID_PORT_PARENT) ||
- (esid->portb == SELFID_PORT_PARENT) ||
- (esid->portc == SELFID_PORT_PARENT) ||
- (esid->portd == SELFID_PORT_PARENT) ||
- (esid->porte == SELFID_PORT_PARENT) ||
- (esid->portf == SELFID_PORT_PARENT) ||
- (esid->portg == SELFID_PORT_PARENT) ||
- (esid->porth == SELFID_PORT_PARENT)) {
- HPSB_INFO("SelfIDs failed root check on "
- "extended SelfID");
- return 0;
- }
- esid--;
- }
-
- sid = (struct selfid *)esid;
- if ((sid->port0 == SELFID_PORT_PARENT) ||
- (sid->port1 == SELFID_PORT_PARENT) ||
- (sid->port2 == SELFID_PORT_PARENT)) {
- 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 cldcnt[nodecount];
- u8 *map = host->speed_map;
- u8 *speedcap = host->speed;
- u8 local_link_speed = host->csr.lnk_spd;
- 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 == SELFID_PORT_CHILD) cldcnt[n]++;
- if (esid->portb == SELFID_PORT_CHILD) cldcnt[n]++;
- if (esid->portc == SELFID_PORT_CHILD) cldcnt[n]++;
- if (esid->portd == SELFID_PORT_CHILD) cldcnt[n]++;
- if (esid->porte == SELFID_PORT_CHILD) cldcnt[n]++;
- if (esid->portf == SELFID_PORT_CHILD) cldcnt[n]++;
- if (esid->portg == SELFID_PORT_CHILD) cldcnt[n]++;
- if (esid->porth == SELFID_PORT_CHILD) cldcnt[n]++;
- } else {
- if (sid->port0 == SELFID_PORT_CHILD) cldcnt[n]++;
- if (sid->port1 == SELFID_PORT_CHILD) cldcnt[n]++;
- if (sid->port2 == SELFID_PORT_CHILD) cldcnt[n]++;
-
- speedcap[n] = sid->speed;
- if (speedcap[n] > local_link_speed)
- speedcap[n] = local_link_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]);
- }
- }
- }
-
- /* assume a maximum speed for 1394b PHYs, nodemgr will correct it */
- if (local_link_speed > SELFID_SPEED_UNKNOWN)
- for (i = 0; i < nodecount; i++)
- if (speedcap[i] == SELFID_SPEED_UNKNOWN)
- speedcap[i] = local_link_speed;
-}
-
-
-/**
- * hpsb_selfid_received - hand over received selfid packet to the core
- *
- * For host driver module usage. Safe to use in interrupt context.
- *
- * The host driver should have done a successful complement check (second
- * quadlet is complement of first) beforehand.
- */
-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));
- }
-}
-
-/**
- * hpsb_selfid_complete - notify completion of SelfID stage to the core
- *
- * For host driver module usage. Safe to use in interrupt context, although
- * quite complex; so you may want to run it in the bottom rather than top half.
- *
- * Notify completion of SelfID stage to the core and report new physical ID
- * and whether host is root now.
- */
-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);
-}
-
-static DEFINE_SPINLOCK(pending_packets_lock);
-
-/**
- * hpsb_packet_sent - notify core of sending a packet
- *
- * For host driver module usage. Safe to call from within a transmit packet
- * routine.
- *
- * Notify core of sending a packet. Ackcode is the ack code returned for async
- * transmits or ACKX_SEND_ERROR if the transmission failed completely; ACKX_NONE
- * for other cases (internal errors that don't justify a panic).
- */
-void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
- int ackcode)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&pending_packets_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(&pending_packets_lock, flags);
- hpsb_free_packet(packet);
- return;
- }
-
- atomic_dec(&packet->refcnt); /* drop HC's reference */
- /* here the packet must be on the host->pending_packets queue */
-
- if (ackcode != ACK_PENDING || !packet->expect_response) {
- packet->state = hpsb_complete;
- list_del_init(&packet->queue);
- spin_unlock_irqrestore(&pending_packets_lock, flags);
- queue_packet_complete(packet);
- return;
- }
-
- packet->state = hpsb_pending;
- packet->sendtime = jiffies;
-
- spin_unlock_irqrestore(&pending_packets_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 negative error number otherwise.
- */
-int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt)
-{
- struct hpsb_packet *packet;
- quadlet_t d = 0;
- 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;
- }
-
- if (rootid != -1)
- d |= PHYPACKET_PHYCONFIG_R | rootid << PHYPACKET_PORT_SHIFT;
- if (gapcnt != -1)
- d |= PHYPACKET_PHYCONFIG_T | gapcnt << PHYPACKET_GAPCOUNT_SHIFT;
-
- packet = hpsb_make_phypacket(host, d);
- if (!packet)
- return -ENOMEM;
-
- 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) {
- unsigned long flags;
-
- atomic_inc(&packet->refcnt);
- /* Set the initial "sendtime" to 10 seconds from now, to
- prevent premature expiry. If a packet takes more than
- 10 seconds to hit the wire, we have bigger problems :) */
- packet->sendtime = jiffies + 10 * HZ;
- spin_lock_irqsave(&pending_packets_lock, flags);
- list_add_tail(&packet->queue, &host->pending_packets);
- spin_unlock_irqrestore(&pending_packets_lock, flags);
- }
-
- 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, -1);
-
- 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 &&
- NODEID_TO_NODE(packet->node_id) != ALL_NODES)
- packet->speed_code =
- host->speed[NODEID_TO_NODE(packet->node_id)];
-
- dump_packet("send packet", packet->header, packet->header_size, packet->speed_code);
-
- 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);
-}
-
-/**
- * hpsb_send_packet_and_wait - enqueue packet, block until transaction completes
- * @packet: packet to send
- *
- * Return value: 0 on success, negative errno on failure.
- */
-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 size_t packet_size_to_data_size(size_t packet_size, size_t header_size,
- size_t buffer_size, int tcode)
-{
- size_t ret = packet_size <= header_size ? 0 : packet_size - header_size;
-
- if (unlikely(ret > buffer_size))
- ret = buffer_size;
-
- if (unlikely(ret + header_size != packet_size))
- HPSB_ERR("unexpected packet size %zd (tcode %d), bug?",
- packet_size, tcode);
- return ret;
-}
-
-static void handle_packet_response(struct hpsb_host *host, int tcode,
- quadlet_t *data, size_t size)
-{
- struct hpsb_packet *packet;
- int tlabel = (data[0] >> 10) & 0x3f;
- size_t header_size;
- unsigned long flags;
-
- spin_lock_irqsave(&pending_packets_lock, flags);
-
- list_for_each_entry(packet, &host->pending_packets, queue)
- if (packet->tlabel == tlabel &&
- packet->node_id == (data[1] >> 16))
- goto found;
-
- spin_unlock_irqrestore(&pending_packets_lock, flags);
- HPSB_DEBUG("unsolicited response packet received - %s",
- "no tlabel match");
- dump_packet("contents", data, 16, -1);
- return;
-
-found:
- switch (packet->tcode) {
- case TCODE_WRITEQ:
- case TCODE_WRITEB:
- if (unlikely(tcode != TCODE_WRITE_RESPONSE))
- break;
- header_size = 12;
- size = 0;
- goto dequeue;
-
- case TCODE_READQ:
- if (unlikely(tcode != TCODE_READQ_RESPONSE))
- break;
- header_size = 16;
- size = 0;
- goto dequeue;
-
- case TCODE_READB:
- if (unlikely(tcode != TCODE_READB_RESPONSE))
- break;
- header_size = 16;
- size = packet_size_to_data_size(size, header_size,
- packet->allocated_data_size,
- tcode);
- goto dequeue;
-
- case TCODE_LOCK_REQUEST:
- if (unlikely(tcode != TCODE_LOCK_RESPONSE))
- break;
- header_size = 16;
- size = packet_size_to_data_size(min(size, (size_t)(16 + 8)),
- header_size,
- packet->allocated_data_size,
- tcode);
- goto dequeue;
- }
-
- spin_unlock_irqrestore(&pending_packets_lock, flags);
- HPSB_DEBUG("unsolicited response packet received - %s",
- "tcode mismatch");
- dump_packet("contents", data, 16, -1);
- return;
-
-dequeue:
- list_del_init(&packet->queue);
- spin_unlock_irqrestore(&pending_packets_lock, flags);
-
- if (packet->state == hpsb_queued) {
- packet->sendtime = jiffies;
- packet->ack_code = ACK_PENDING;
- }
- packet->state = hpsb_complete;
-
- memcpy(packet->header, data, header_size);
- if (size)
- memcpy(packet->data, data + 4, size);
-
- 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 */
- HPSB_ERR("out of memory, cannot send response packet");
- 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_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;
-}
-
-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;
-
- /* FIXME?
- * Out-of-bounds lengths are left for highlevel_read|write to cap. */
-
- switch (tcode) {
- case TCODE_WRITEQ:
- addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
- rcode = highlevel_write(host, source, dest, data + 3,
- addr, 4, flags);
- goto handle_write_request;
-
- case TCODE_WRITEB:
- addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
- rcode = highlevel_write(host, source, dest, data + 4,
- addr, data[3] >> 16, flags);
-handle_write_request:
- if (rcode < 0 || write_acked ||
- NODEID_TO_NODE(data[0] >> 16) == NODE_MASK)
- return;
- /* not a broadcast write, reply */
- packet = create_reply_packet(host, data, 0);
- if (packet) {
- fill_async_write_resp(packet, rcode);
- send_packet_nocare(packet);
- }
- return;
-
- case TCODE_READQ:
- addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
- rcode = highlevel_read(host, source, &buffer, addr, 4, flags);
- if (rcode < 0)
- return;
-
- packet = create_reply_packet(host, data, 0);
- if (packet) {
- fill_async_readquad_resp(packet, rcode, buffer);
- send_packet_nocare(packet);
- }
- return;
-
- case TCODE_READB:
- length = data[3] >> 16;
- packet = create_reply_packet(host, data, length);
- if (!packet)
- return;
-
- addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
- rcode = highlevel_read(host, source, packet->data, addr,
- length, flags);
- if (rcode < 0) {
- hpsb_free_packet(packet);
- return;
- }
- fill_async_readblock_resp(packet, rcode, length);
- send_packet_nocare(packet);
- return;
-
- case TCODE_LOCK_REQUEST:
- length = data[3] >> 16;
- extcode = data[3] & 0xffff;
- addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
-
- packet = create_reply_packet(host, data, 8);
- if (!packet)
- return;
-
- 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)
- hpsb_free_packet(packet);
- else
- send_packet_nocare(packet);
- return;
- }
-}
-
-/**
- * hpsb_packet_received - hand over received packet to the core
- *
- * For host driver module usage.
- *
- * The contents of data are expected to be the full packet but with the CRCs
- * left out (data block follows header immediately), with the header (i.e. the
- * first four quadlets) in machine byte order and the data block in big endian.
- * *@data can be safely overwritten after this call.
- *
- * If the packet is a write request, @write_acked is to be set to true if it was
- * ack_complete'd already, false otherwise. This argument is ignored for any
- * other packet type.
- */
-void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
- int write_acked)
-{
- int tcode;
-
- if (unlikely(host->in_bus_reset)) {
- HPSB_DEBUG("received packet during reset; ignoring");
- return;
- }
-
- dump_packet("received packet", data, size, -1);
-
- 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_CYCLE_START:
- /* simply ignore this packet if it is passed on */
- break;
-
- default:
- HPSB_DEBUG("received packet with bogus transaction code %d",
- tcode);
- break;
- }
-}
-
-static void abort_requests(struct hpsb_host *host)
-{
- struct hpsb_packet *packet, *p;
- struct list_head tmp;
- unsigned long flags;
-
- host->driver->devctl(host, CANCEL_REQUESTS, 0);
-
- INIT_LIST_HEAD(&tmp);
- spin_lock_irqsave(&pending_packets_lock, flags);
- list_splice_init(&host->pending_packets, &tmp);
- spin_unlock_irqrestore(&pending_packets_lock, flags);
-
- list_for_each_entry_safe(packet, p, &tmp, queue) {
- list_del_init(&packet->queue);
- 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;
- struct hpsb_packet *packet, *p;
- struct list_head tmp;
- unsigned long flags, expire, j;
-
- spin_lock_irqsave(&host->csr.lock, flags);
- expire = host->csr.expire;
- spin_unlock_irqrestore(&host->csr.lock, flags);
-
- j = jiffies;
- INIT_LIST_HEAD(&tmp);
- spin_lock_irqsave(&pending_packets_lock, flags);
-
- list_for_each_entry_safe(packet, p, &host->pending_packets, queue) {
- if (time_before(packet->sendtime + expire, j))
- list_move_tail(&packet->queue, &tmp);
- 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 (!list_empty(&host->pending_packets))
- mod_timer(&host->timeout, j + host->timeout_interval);
-
- spin_unlock_irqrestore(&pending_packets_lock, flags);
-
- list_for_each_entry_safe(packet, p, &tmp, queue) {
- list_del_init(&packet->queue);
- packet->state = hpsb_complete;
- packet->ack_code = ACKX_TIMEOUT;
- queue_packet_complete(packet);
- }
-}
-
-static struct task_struct *khpsbpkt_thread;
-static LIST_HEAD(hpsbpkt_queue);
-
-static void queue_packet_complete(struct hpsb_packet *packet)
-{
- unsigned long flags;
-
- if (packet->no_waiter) {
- hpsb_free_packet(packet);
- return;
- }
- if (packet->complete_routine != NULL) {
- spin_lock_irqsave(&pending_packets_lock, flags);
- list_add_tail(&packet->queue, &hpsbpkt_queue);
- spin_unlock_irqrestore(&pending_packets_lock, flags);
- wake_up_process(khpsbpkt_thread);
- }
- return;
-}
-
-/*
- * Kernel thread which handles packets that are completed. This way the
- * packet's "complete" function is asynchronously run in process context.
- * Only packets which have a "complete" function may be sent here.
- */
-static int hpsbpkt_thread(void *__hi)
-{
- struct hpsb_packet *packet, *p;
- struct list_head tmp;
- int may_schedule;
-
- while (!kthread_should_stop()) {
-
- INIT_LIST_HEAD(&tmp);
- spin_lock_irq(&pending_packets_lock);
- list_splice_init(&hpsbpkt_queue, &tmp);
- spin_unlock_irq(&pending_packets_lock);
-
- list_for_each_entry_safe(packet, p, &tmp, queue) {
- list_del_init(&packet->queue);
- packet->complete_routine(packet->complete_data);
- }
-
- set_current_state(TASK_INTERRUPTIBLE);
- spin_lock_irq(&pending_packets_lock);
- may_schedule = list_empty(&hpsbpkt_queue);
- spin_unlock_irq(&pending_packets_lock);
- if (may_schedule)
- schedule();
- __set_current_state(TASK_RUNNING);
- }
- return 0;
-}
-
-static int __init ieee1394_init(void)
-{
- int i, ret;
-
- /* 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_thread = kthread_run(hpsbpkt_thread, NULL, "khpsbpkt");
- if (IS_ERR(khpsbpkt_thread)) {
- HPSB_ERR("Failed to start hpsbpkt thread!\n");
- ret = PTR_ERR(khpsbpkt_thread);
- 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;
- }
-
- ret = bus_register(&ieee1394_bus_type);
- if (ret < 0) {
- HPSB_INFO("bus register failed");
- goto release_chrdev;
- }
-
- 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_chrdev;
- }
- }
-
- ret = class_register(&hpsb_host_class);
- if (ret < 0)
- goto release_all_bus;
-
- hpsb_protocol_class = class_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_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_chrdev:
- unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
-exit_release_kernel_thread:
- kthread_stop(khpsbpkt_thread);
-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_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);
-
- kthread_stop(khpsbpkt_thread);
-
- hpsb_cleanup_config_roms();
-
- unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
-}
-
-fs_initcall(ieee1394_init);
-module_exit(ieee1394_cleanup);
-
-/* Exported symbols */
-
-/** hosts.c **/
-EXPORT_SYMBOL(hpsb_alloc_host);
-EXPORT_SYMBOL(hpsb_add_host);
-EXPORT_SYMBOL(hpsb_resume_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_packet);
-EXPORT_SYMBOL(hpsb_reset_bus);
-EXPORT_SYMBOL(hpsb_read_cycle_timer);
-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_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_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);
-
-/** nodemgr.c **/
-EXPORT_SYMBOL(hpsb_node_fill_packet);
-EXPORT_SYMBOL(hpsb_node_write);
-EXPORT_SYMBOL(__hpsb_register_protocol);
-EXPORT_SYMBOL(hpsb_unregister_protocol);
-
-/** 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_attach_keyval_to_directory);
-EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
-EXPORT_SYMBOL(csr1212_get_keyval);
-EXPORT_SYMBOL(csr1212_new_directory);
-EXPORT_SYMBOL(csr1212_parse_keyval);
-EXPORT_SYMBOL(csr1212_read);
-EXPORT_SYMBOL(csr1212_release_keyval);