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/*
* IEEE 1394 for Linux
*
* Low level (host adapter) management.
*
* Copyright (C) 1999 Andreas E. Bombe
* Copyright (C) 1999 Emanuel Pirker
*
* This code is licensed under the GPL. See the file COPYING in the root
* directory of the kernel sources for details.
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/vmalloc.h>
#include <linux/wait.h>
#include "ieee1394_types.h"
#include "hosts.h"
#include "ieee1394_core.h"
#include "highlevel.h"
static LIST_HEAD(templates);
static spinlock_t templates_lock = SPIN_LOCK_UNLOCKED;
/*
* This function calls the add_host/remove_host hooks for every host currently
* registered. Init == TRUE means add_host.
*/
void hl_all_hosts(struct hpsb_highlevel *hl, int init)
{
struct list_head *tlh, *hlh;
struct hpsb_host_template *tmpl;
struct hpsb_host *host;
spin_lock(&templates_lock);
list_for_each(tlh, &templates) {
tmpl = list_entry(tlh, struct hpsb_host_template, list);
list_for_each(hlh, &tmpl->hosts) {
host = list_entry(hlh, struct hpsb_host, list);
if (host->initialized) {
if (init) {
if (hl->op->add_host) {
hl->op->add_host(host);
}
} else {
if (hl->op->remove_host) {
hl->op->remove_host(host);
}
}
}
}
}
spin_unlock(&templates_lock);
}
int hpsb_inc_host_usage(struct hpsb_host *host)
{
struct list_head *tlh, *hlh;
struct hpsb_host_template *tmpl;
int retval = 0;
unsigned long flags;
spin_lock_irqsave(&templates_lock, flags);
list_for_each(tlh, &templates) {
tmpl = list_entry(tlh, struct hpsb_host_template, list);
list_for_each(hlh, &tmpl->hosts) {
if (host == list_entry(hlh, struct hpsb_host, list)) {
tmpl->devctl(host, MODIFY_USAGE, 1);
retval = 1;
break;
}
}
if (retval)
break;
}
spin_unlock_irqrestore(&templates_lock, flags);
return retval;
}
void hpsb_dec_host_usage(struct hpsb_host *host)
{
host->template->devctl(host, MODIFY_USAGE, 0);
}
/*
* The following function is exported for module usage. It will be called from
* the detect function of a adapter driver.
*/
struct hpsb_host *hpsb_get_host(struct hpsb_host_template *tmpl,
size_t hd_size)
{
struct hpsb_host *h;
h = vmalloc(sizeof(struct hpsb_host) + hd_size);
if (!h) return NULL;
memset(h, 0, sizeof(struct hpsb_host) + hd_size);
atomic_set(&h->generation, 0);
INIT_LIST_HEAD(&h->pending_packets);
spin_lock_init(&h->pending_pkt_lock);
sema_init(&h->tlabel_count, 64);
spin_lock_init(&h->tlabel_lock);
INIT_TQUEUE(&h->timeout_tq, (void (*)(void*))abort_timedouts, h);
h->topology_map = h->csr.topology_map + 3;
h->speed_map = (u8 *)(h->csr.speed_map + 2);
h->template = tmpl;
if (hd_size)
h->hostdata = &h->embedded_hostdata[0];
list_add_tail(&h->list, &tmpl->hosts);
return h;
}
static void free_all_hosts(struct hpsb_host_template *tmpl)
{
struct list_head *hlh, *next;
struct hpsb_host *host;
list_for_each_safe(hlh, next, &tmpl->hosts) {
host = list_entry(hlh, struct hpsb_host, list);
vfree(host);
}
}
static void init_hosts(struct hpsb_host_template *tmpl)
{
int count;
struct list_head *hlh;
struct hpsb_host *host;
count = tmpl->detect_hosts(tmpl);
list_for_each(hlh, &tmpl->hosts) {
host = list_entry(hlh, struct hpsb_host, list);
if (tmpl->initialize_host(host)) {
host->initialized = 1;
highlevel_add_host(host);
hpsb_reset_bus(host, LONG_RESET);
}
}
tmpl->number_of_hosts = count;
HPSB_INFO("detected %d %s adapter%s", count, tmpl->name,
(count != 1 ? "s" : ""));
}
static void shutdown_hosts(struct hpsb_host_template *tmpl)
{
struct list_head *hlh;
struct hpsb_host *host;
list_for_each(hlh, &tmpl->hosts) {
host = list_entry(hlh, struct hpsb_host, list);
if (host->initialized) {
highlevel_remove_host(host);
host->initialized = 0;
abort_requests(host);
tmpl->release_host(host);
while (test_bit(0, &host->timeout_tq.sync)) {
schedule();
}
}
}
free_all_hosts(tmpl);
tmpl->release_host(NULL);
tmpl->number_of_hosts = 0;
}
/*
* The following two functions are exported symbols for module usage.
*/
int hpsb_register_lowlevel(struct hpsb_host_template *tmpl)
{
INIT_LIST_HEAD(&tmpl->hosts);
tmpl->number_of_hosts = 0;
spin_lock(&templates_lock);
list_add_tail(&tmpl->list, &templates);
spin_unlock(&templates_lock);
/* PCI cards should be smart and use the PCI detection layer, and
* not this one shot deal. detect_hosts() will be obsoleted soon. */
if (tmpl->detect_hosts != NULL) {
HPSB_DEBUG("Registered %s driver, initializing now", tmpl->name);
init_hosts(tmpl);
}
return 0;
}
void hpsb_unregister_lowlevel(struct hpsb_host_template *tmpl)
{
shutdown_hosts(tmpl);
if (tmpl->number_of_hosts)
HPSB_PANIC("attempted to remove busy host template "
"of %s at address 0x%p", tmpl->name, tmpl);
else {
spin_lock(&templates_lock);
list_del(&tmpl->list);
spin_unlock(&templates_lock);
}
}
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