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gerrit-public.fairphone.software / kernel / msm-4.9 / 392160335c798bbe94ab3aae6ea0c85d32b81bbc / . / drivers / ieee1394 / ieee1394_core.c
blob: b248d89de8b4e26c543d5b30c2bd7a187d657059 [file] [log] [blame]
/*
* 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;
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 *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);
/* 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;
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 (try_to_freeze())
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_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_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_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_packet);
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);
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
EXPORT_SYMBOL(hpsb_send_phy_config);
EXPORT_SYMBOL(hpsb_send_packet_and_wait);
#endif
/** 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_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_host_reset);
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
EXPORT_SYMBOL(highlevel_add_host);
EXPORT_SYMBOL(highlevel_remove_host);
#endif
/** 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);
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
EXPORT_SYMBOL(nodemgr_for_each_host);
#endif
/** 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_new_directory);
EXPORT_SYMBOL(csr1212_attach_keyval_to_directory);
EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
EXPORT_SYMBOL(csr1212_release_keyval);
EXPORT_SYMBOL(csr1212_read);
EXPORT_SYMBOL(csr1212_parse_keyval);
EXPORT_SYMBOL(_csr1212_read_keyval);
EXPORT_SYMBOL(_csr1212_destroy_keyval);
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
EXPORT_SYMBOL(csr1212_create_csr);
EXPORT_SYMBOL(csr1212_init_local_csr);
EXPORT_SYMBOL(csr1212_new_immediate);
EXPORT_SYMBOL(csr1212_associate_keyval);
EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf);
EXPORT_SYMBOL(csr1212_destroy_csr);
EXPORT_SYMBOL(csr1212_generate_csr_image);
EXPORT_SYMBOL(csr1212_parse_csr);
#endif