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/*
* IEEE 1394 for Linux
*
* Copyright (C) 1999 Andreas E. Bombe
*
* 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/slab.h>
#include "ieee1394.h"
#include "ieee1394_types.h"
#include "hosts.h"
#include "ieee1394_core.h"
#include "highlevel.h"
LIST_HEAD(hl_drivers);
rwlock_t hl_drivers_lock = RW_LOCK_UNLOCKED;
LIST_HEAD(addr_space);
rwlock_t addr_space_lock = RW_LOCK_UNLOCKED;
/* addr_space list will have zero and max already included as bounds */
static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL };
static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr;
struct hpsb_highlevel *hpsb_register_highlevel(const char *name,
struct hpsb_highlevel_ops *ops)
{
struct hpsb_highlevel *hl;
hl = (struct hpsb_highlevel *)kmalloc(sizeof(struct hpsb_highlevel),
GFP_KERNEL);
if (hl == NULL) {
return NULL;
}
INIT_LIST_HEAD(&hl->hl_list);
INIT_LIST_HEAD(&hl->addr_list);
hl->name = name;
hl->op = ops;
write_lock_irq(&hl_drivers_lock);
hl_all_hosts(hl, 1);
list_add_tail(&hl->hl_list, &hl_drivers);
write_unlock_irq(&hl_drivers_lock);
return hl;
}
void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
{
struct list_head *entry;
struct hpsb_address_serve *as;
if (hl == NULL) {
return;
}
write_lock_irq(&addr_space_lock);
entry = hl->addr_list.next;
while (entry != &hl->addr_list) {
as = list_entry(entry, struct hpsb_address_serve, addr_list);
list_del(&as->as_list);
entry = entry->next;
kfree(as);
}
write_unlock_irq(&addr_space_lock);
write_lock_irq(&hl_drivers_lock);
list_del(&hl->hl_list);
hl_all_hosts(hl, 0);
write_unlock_irq(&hl_drivers_lock);
kfree(hl);
}
int hpsb_register_addrspace(struct hpsb_highlevel *hl,
struct hpsb_address_ops *ops, u64 start, u64 end)
{
struct hpsb_address_serve *as;
struct list_head *entry;
int retval = 0;
if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) {
HPSB_ERR(__FUNCTION__ " called with invalid addresses");
return 0;
}
as = (struct hpsb_address_serve *)
kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
if (as == NULL) {
return 0;
}
INIT_LIST_HEAD(&as->as_list);
INIT_LIST_HEAD(&as->addr_list);
as->op = ops;
as->start = start;
as->end = end;
write_lock_irq(&addr_space_lock);
entry = addr_space.next;
while (list_entry(entry, struct hpsb_address_serve, as_list)->end
<= start) {
if (list_entry(entry->next, struct hpsb_address_serve, as_list)
->start >= end) {
list_add(&as->as_list, entry);
list_add_tail(&as->addr_list, &hl->addr_list);
retval = 1;
break;
}
entry = entry->next;
}
write_unlock_irq(&addr_space_lock);
if (retval == 0) {
kfree(as);
}
return retval;
}
void hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
unsigned int channel)
{
if (channel > 63) {
HPSB_ERR(__FUNCTION__ " called with invalid channel");
return;
}
if (host->iso_listen_count[channel]++ == 0) {
host->template->devctl(host, ISO_LISTEN_CHANNEL, channel);
}
}
void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
unsigned int channel)
{
if (channel > 63) {
HPSB_ERR(__FUNCTION__ " called with invalid channel");
return;
}
if (--host->iso_listen_count[channel] == 0) {
host->template->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
}
}
#define DEFINE_MULTIPLEXER(Function) \
void highlevel_##Function(struct hpsb_host *host) \
{ \
struct list_head *lh; \
void (*funcptr)(struct hpsb_host*); \
read_lock(&hl_drivers_lock); \
list_for_each(lh, &hl_drivers) { \
funcptr = list_entry(lh, struct hpsb_highlevel, hl_list) \
->op->Function; \
if (funcptr) funcptr(host); \
} \
read_unlock(&hl_drivers_lock); \
}
DEFINE_MULTIPLEXER(add_host)
DEFINE_MULTIPLEXER(remove_host)
DEFINE_MULTIPLEXER(host_reset)
#undef DEFINE_MULTIPLEXER
/* Add one host to our list */
void highlevel_add_one_host (struct hpsb_host *host)
{
if (host->template->initialize_host)
if (!host->template->initialize_host(host))
goto fail;
host->initialized = 1;
highlevel_add_host (host);
hpsb_reset_bus (host, LONG_RESET);
fail:
host->template->number_of_hosts++;
}
void highlevel_iso_receive(struct hpsb_host *host, quadlet_t *data,
unsigned int length)
{
struct list_head *entry;
struct hpsb_highlevel *hl;
int channel = (data[0] >> 8) & 0x3f;
read_lock(&hl_drivers_lock);
entry = hl_drivers.next;
while (entry != &hl_drivers) {
hl = list_entry(entry, struct hpsb_highlevel, hl_list);
if (hl->op->iso_receive) {
hl->op->iso_receive(host, channel, data, length);
}
entry = entry->next;
}
read_unlock(&hl_drivers_lock);
}
void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
u8 *data, unsigned int length)
{
struct list_head *entry;
struct hpsb_highlevel *hl;
int cts = data[0] >> 4;
read_lock(&hl_drivers_lock);
entry = hl_drivers.next;
while (entry != &hl_drivers) {
hl = list_entry(entry, struct hpsb_highlevel, hl_list);
if (hl->op->fcp_request) {
hl->op->fcp_request(host, nodeid, direction, cts, data,
length);
}
entry = entry->next;
}
read_unlock(&hl_drivers_lock);
}
int highlevel_read(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
u64 addr, unsigned int length)
{
struct hpsb_address_serve *as;
struct list_head *entry;
unsigned int partlength;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
entry = addr_space.next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
while (as->start <= addr) {
if (as->end > addr) {
partlength = MIN((unsigned int)(as->end - addr),
length);
if (as->op->read != NULL) {
rcode = as->op->read(host, nodeid, buffer, addr,
partlength);
} else {
rcode = RCODE_TYPE_ERROR;
}
length -= partlength;
addr += partlength;
if ((rcode != RCODE_COMPLETE) || !length) {
break;
}
}
entry = entry->next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
}
read_unlock(&addr_space_lock);
if (length && (rcode == RCODE_COMPLETE)) {
rcode = RCODE_ADDRESS_ERROR;
}
return rcode;
}
int highlevel_write(struct hpsb_host *host, int nodeid, int destid,
quadlet_t *data, u64 addr, unsigned int length)
{
struct hpsb_address_serve *as;
struct list_head *entry;
unsigned int partlength;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
entry = addr_space.next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
while (as->start <= addr) {
if (as->end > addr) {
partlength = MIN((unsigned int)(as->end - addr),
length);
if (as->op->write != NULL) {
rcode = as->op->write(host, nodeid, destid, data,
addr, partlength);
} else {
rcode = RCODE_TYPE_ERROR;
}
length -= partlength;
addr += partlength;
if ((rcode != RCODE_COMPLETE) || !length) {
break;
}
}
entry = entry->next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
}
read_unlock(&addr_space_lock);
if (length && (rcode == RCODE_COMPLETE)) {
rcode = RCODE_ADDRESS_ERROR;
}
return rcode;
}
int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode)
{
struct hpsb_address_serve *as;
struct list_head *entry;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
entry = addr_space.next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
while (as->start <= addr) {
if (as->end > addr) {
if (as->op->lock != NULL) {
rcode = as->op->lock(host, nodeid, store, addr,
data, arg, ext_tcode);
} else {
rcode = RCODE_TYPE_ERROR;
}
break;
}
entry = entry->next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
}
read_unlock(&addr_space_lock);
return rcode;
}
int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
u64 addr, octlet_t data, octlet_t arg, int ext_tcode)
{
struct hpsb_address_serve *as;
struct list_head *entry;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
entry = addr_space.next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
while (as->start <= addr) {
if (as->end > addr) {
if (as->op->lock64 != NULL) {
rcode = as->op->lock64(host, nodeid, store,
addr, data, arg,
ext_tcode);
} else {
rcode = RCODE_TYPE_ERROR;
}
break;
}
entry = entry->next;
as = list_entry(entry, struct hpsb_address_serve, as_list);
}
read_unlock(&addr_space_lock);
return rcode;
}
void init_hpsb_highlevel(void)
{
INIT_LIST_HEAD(&dummy_zero_addr.as_list);
INIT_LIST_HEAD(&dummy_zero_addr.addr_list);
INIT_LIST_HEAD(&dummy_max_addr.as_list);
INIT_LIST_HEAD(&dummy_max_addr.addr_list);
dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;
dummy_zero_addr.start = dummy_zero_addr.end = 0;
dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48;
list_add_tail(&dummy_zero_addr.as_list, &addr_space);
list_add_tail(&dummy_max_addr.as_list, &addr_space);
}
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