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linux_dsm_epyc7002/drivers/ieee1394/highlevel.c
Linus Torvalds 1da177e4c3 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!
2005-04-16 15:20:36 -07:00

705 lines
18 KiB
C
Raw Blame History

/*
* 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.
*
*
* Contributions:
*
* Christian Toegel <christian.toegel@gmx.at>
* unregister address space
*
* Manfred Weihs <weihs@ict.tuwien.ac.at>
* unregister address space
*
*/
#include <linux/config.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/bitops.h>
#include "ieee1394.h"
#include "ieee1394_types.h"
#include "hosts.h"
#include "ieee1394_core.h"
#include "highlevel.h"
#include "nodemgr.h"
struct hl_host_info {
struct list_head list;
struct hpsb_host *host;
size_t size;
unsigned long key;
void *data;
};
static LIST_HEAD(hl_drivers);
static DECLARE_RWSEM(hl_drivers_sem);
static LIST_HEAD(hl_irqs);
static DEFINE_RWLOCK(hl_irqs_lock);
static DEFINE_RWLOCK(addr_space_lock);
/* 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;
static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl,
struct hpsb_host *host)
{
struct hl_host_info *hi = NULL;
if (!hl || !host)
return NULL;
read_lock(&hl->host_info_lock);
list_for_each_entry(hi, &hl->host_info_list, list) {
if (hi->host == host) {
read_unlock(&hl->host_info_lock);
return hi;
}
}
read_unlock(&hl->host_info_lock);
return NULL;
}
/* Returns a per host/driver data structure that was previously stored by
* hpsb_create_hostinfo. */
void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
{
struct hl_host_info *hi = hl_get_hostinfo(hl, host);
if (hi)
return hi->data;
return NULL;
}
/* If size is zero, then the return here is only valid for error checking */
void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
size_t data_size)
{
struct hl_host_info *hi;
void *data;
unsigned long flags;
hi = hl_get_hostinfo(hl, host);
if (hi) {
HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already exists",
hl->name);
return NULL;
}
hi = kmalloc(sizeof(*hi) + data_size, GFP_ATOMIC);
if (!hi)
return NULL;
memset(hi, 0, sizeof(*hi) + data_size);
if (data_size) {
data = hi->data = hi + 1;
hi->size = data_size;
} else
data = hi;
hi->host = host;
write_lock_irqsave(&hl->host_info_lock, flags);
list_add_tail(&hi->list, &hl->host_info_list);
write_unlock_irqrestore(&hl->host_info_lock, flags);
return data;
}
int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
void *data)
{
struct hl_host_info *hi;
hi = hl_get_hostinfo(hl, host);
if (hi) {
if (!hi->size && !hi->data) {
hi->data = data;
return 0;
} else
HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo already has data",
hl->name);
} else
HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
hl->name);
return -EINVAL;
}
void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
{
struct hl_host_info *hi;
hi = hl_get_hostinfo(hl, host);
if (hi) {
unsigned long flags;
write_lock_irqsave(&hl->host_info_lock, flags);
list_del(&hi->list);
write_unlock_irqrestore(&hl->host_info_lock, flags);
kfree(hi);
}
return;
}
void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key)
{
struct hl_host_info *hi;
hi = hl_get_hostinfo(hl, host);
if (hi)
hi->key = key;
return;
}
void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
{
struct hl_host_info *hi;
void *data = NULL;
if (!hl)
return NULL;
read_lock(&hl->host_info_lock);
list_for_each_entry(hi, &hl->host_info_list, list) {
if (hi->key == key) {
data = hi->data;
break;
}
}
read_unlock(&hl->host_info_lock);
return data;
}
static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data)
{
struct hpsb_highlevel *hl = __data;
hl->add_host(host);
if (host->update_config_rom) {
if (hpsb_update_config_rom_image(host) < 0) {
HPSB_ERR("Failed to generate Configuration ROM image for host "
"%s-%d", hl->name, host->id);
}
}
return 0;
}
void hpsb_register_highlevel(struct hpsb_highlevel *hl)
{
INIT_LIST_HEAD(&hl->addr_list);
INIT_LIST_HEAD(&hl->host_info_list);
rwlock_init(&hl->host_info_lock);
down_write(&hl_drivers_sem);
list_add_tail(&hl->hl_list, &hl_drivers);
up_write(&hl_drivers_sem);
write_lock(&hl_irqs_lock);
list_add_tail(&hl->irq_list, &hl_irqs);
write_unlock(&hl_irqs_lock);
if (hl->add_host)
nodemgr_for_each_host(hl, highlevel_for_each_host_reg);
return;
}
static void __delete_addr(struct hpsb_address_serve *as)
{
list_del(&as->host_list);
list_del(&as->hl_list);
kfree(as);
}
static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, int update_cr)
{
unsigned long flags;
struct list_head *lh, *next;
struct hpsb_address_serve *as;
/* First, let the highlevel driver unreg */
if (hl->remove_host)
hl->remove_host(host);
/* Remove any addresses that are matched for this highlevel driver
* and this particular host. */
write_lock_irqsave(&addr_space_lock, flags);
list_for_each_safe (lh, next, &hl->addr_list) {
as = list_entry(lh, struct hpsb_address_serve, hl_list);
if (as->host == host)
__delete_addr(as);
}
write_unlock_irqrestore(&addr_space_lock, flags);
/* Now update the config-rom to reflect anything removed by the
* highlevel driver. */
if (update_cr && host->update_config_rom) {
if (hpsb_update_config_rom_image(host) < 0) {
HPSB_ERR("Failed to generate Configuration ROM image for host "
"%s-%d", hl->name, host->id);
}
}
/* And finally, remove all the host info associated between these
* two. */
hpsb_destroy_hostinfo(hl, host);
}
static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data)
{
struct hpsb_highlevel *hl = __data;
__unregister_host(hl, host, 1);
return 0;
}
void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
{
write_lock(&hl_irqs_lock);
list_del(&hl->irq_list);
write_unlock(&hl_irqs_lock);
down_write(&hl_drivers_sem);
list_del(&hl->hl_list);
up_write(&hl_drivers_sem);
nodemgr_for_each_host(hl, highlevel_for_each_host_unreg);
}
u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
struct hpsb_host *host,
struct hpsb_address_ops *ops,
u64 size, u64 alignment,
u64 start, u64 end)
{
struct hpsb_address_serve *as, *a1, *a2;
struct list_head *entry;
u64 retval = ~0ULL;
unsigned long flags;
u64 align_mask = ~(alignment - 1);
if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
((hweight32(alignment >> 32) +
hweight32(alignment & 0xffffffff) != 1))) {
HPSB_ERR("%s called with invalid alignment: 0x%048llx",
__FUNCTION__, (unsigned long long)alignment);
return retval;
}
if (start == ~0ULL && end == ~0ULL) {
start = CSR1212_ALL_SPACE_BASE + 0xffff00000000ULL; /* ohci1394.c limit */
end = CSR1212_ALL_SPACE_END;
}
if (((start|end) & ~align_mask) || (start >= end) || (end > 0x1000000000000ULL)) {
HPSB_ERR("%s called with invalid addresses (start = %012Lx end = %012Lx)",
__FUNCTION__, (unsigned long long)start, (unsigned long long)end);
return retval;
}
as = (struct hpsb_address_serve *)
kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
if (as == NULL) {
return retval;
}
INIT_LIST_HEAD(&as->host_list);
INIT_LIST_HEAD(&as->hl_list);
as->op = ops;
as->host = host;
write_lock_irqsave(&addr_space_lock, flags);
list_for_each(entry, &host->addr_space) {
u64 a1sa, a1ea;
u64 a2sa, a2ea;
a1 = list_entry(entry, struct hpsb_address_serve, host_list);
a2 = list_entry(entry->next, struct hpsb_address_serve, host_list);
a1sa = a1->start & align_mask;
a1ea = (a1->end + alignment -1) & align_mask;
a2sa = a2->start & align_mask;
a2ea = (a2->end + alignment -1) & align_mask;
if ((a2sa - a1ea >= size) && (a2sa - start >= size) && (a2sa > start)) {
as->start = max(start, a1ea);
as->end = as->start + size;
list_add(&as->host_list, entry);
list_add_tail(&as->hl_list, &hl->addr_list);
retval = as->start;
break;
}
}
write_unlock_irqrestore(&addr_space_lock, flags);
if (retval == ~0ULL) {
kfree(as);
}
return retval;
}
int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
struct hpsb_address_ops *ops, u64 start, u64 end)
{
struct hpsb_address_serve *as;
struct list_head *lh;
int retval = 0;
unsigned long flags;
if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) {
HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
return 0;
}
as = (struct hpsb_address_serve *)
kmalloc(sizeof(struct hpsb_address_serve), GFP_ATOMIC);
if (as == NULL) {
return 0;
}
INIT_LIST_HEAD(&as->host_list);
INIT_LIST_HEAD(&as->hl_list);
as->op = ops;
as->start = start;
as->end = end;
as->host = host;
write_lock_irqsave(&addr_space_lock, flags);
list_for_each(lh, &host->addr_space) {
struct hpsb_address_serve *as_this =
list_entry(lh, struct hpsb_address_serve, host_list);
struct hpsb_address_serve *as_next =
list_entry(lh->next, struct hpsb_address_serve, host_list);
if (as_this->end > as->start)
break;
if (as_next->start >= as->end) {
list_add(&as->host_list, lh);
list_add_tail(&as->hl_list, &hl->addr_list);
retval = 1;
break;
}
}
write_unlock_irqrestore(&addr_space_lock, flags);
if (retval == 0)
kfree(as);
return retval;
}
int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
u64 start)
{
int retval = 0;
struct hpsb_address_serve *as;
struct list_head *lh, *next;
unsigned long flags;
write_lock_irqsave(&addr_space_lock, flags);
list_for_each_safe (lh, next, &hl->addr_list) {
as = list_entry(lh, struct hpsb_address_serve, hl_list);
if (as->start == start && as->host == host) {
__delete_addr(as);
retval = 1;
break;
}
}
write_unlock_irqrestore(&addr_space_lock, flags);
return retval;
}
int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
unsigned int channel)
{
if (channel > 63) {
HPSB_ERR("%s called with invalid channel", __FUNCTION__);
return -EINVAL;
}
if (host->iso_listen_count[channel]++ == 0) {
return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel);
}
return 0;
}
void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
unsigned int channel)
{
if (channel > 63) {
HPSB_ERR("%s called with invalid channel", __FUNCTION__);
return;
}
if (--host->iso_listen_count[channel] == 0) {
host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
}
}
static void init_hpsb_highlevel(struct hpsb_host *host)
{
INIT_LIST_HEAD(&dummy_zero_addr.host_list);
INIT_LIST_HEAD(&dummy_zero_addr.hl_list);
INIT_LIST_HEAD(&dummy_max_addr.host_list);
INIT_LIST_HEAD(&dummy_max_addr.hl_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.host_list, &host->addr_space);
list_add_tail(&dummy_max_addr.host_list, &host->addr_space);
}
void highlevel_add_host(struct hpsb_host *host)
{
struct hpsb_highlevel *hl;
init_hpsb_highlevel(host);
down_read(&hl_drivers_sem);
list_for_each_entry(hl, &hl_drivers, hl_list) {
if (hl->add_host)
hl->add_host(host);
}
up_read(&hl_drivers_sem);
if (host->update_config_rom) {
if (hpsb_update_config_rom_image(host) < 0)
HPSB_ERR("Failed to generate Configuration ROM image for "
"host %s-%d", hl->name, host->id);
}
}
void highlevel_remove_host(struct hpsb_host *host)
{
struct hpsb_highlevel *hl;
down_read(&hl_drivers_sem);
list_for_each_entry(hl, &hl_drivers, hl_list)
__unregister_host(hl, host, 0);
up_read(&hl_drivers_sem);
}
void highlevel_host_reset(struct hpsb_host *host)
{
struct hpsb_highlevel *hl;
read_lock(&hl_irqs_lock);
list_for_each_entry(hl, &hl_irqs, irq_list) {
if (hl->host_reset)
hl->host_reset(host);
}
read_unlock(&hl_irqs_lock);
}
void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length)
{
struct hpsb_highlevel *hl;
int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
read_lock(&hl_irqs_lock);
list_for_each_entry(hl, &hl_irqs, irq_list) {
if (hl->iso_receive)
hl->iso_receive(host, channel, data, length);
}
read_unlock(&hl_irqs_lock);
}
void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
void *data, size_t length)
{
struct hpsb_highlevel *hl;
int cts = ((quadlet_t *)data)[0] >> 4;
read_lock(&hl_irqs_lock);
list_for_each_entry(hl, &hl_irqs, irq_list) {
if (hl->fcp_request)
hl->fcp_request(host, nodeid, direction, cts, data,
length);
}
read_unlock(&hl_irqs_lock);
}
int highlevel_read(struct hpsb_host *host, int nodeid, void *data,
u64 addr, unsigned int length, u16 flags)
{
struct hpsb_address_serve *as;
unsigned int partlength;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
list_for_each_entry(as, &host->addr_space, host_list) {
if (as->start > addr)
break;
if (as->end > addr) {
partlength = min(as->end - addr, (u64) length);
if (as->op->read) {
rcode = as->op->read(host, nodeid, data,
addr, partlength, flags);
} else {
rcode = RCODE_TYPE_ERROR;
}
data += partlength;
length -= partlength;
addr += partlength;
if ((rcode != RCODE_COMPLETE) || !length) {
break;
}
}
}
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,
void *data, u64 addr, unsigned int length, u16 flags)
{
struct hpsb_address_serve *as;
unsigned int partlength;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
list_for_each_entry(as, &host->addr_space, host_list) {
if (as->start > addr)
break;
if (as->end > addr) {
partlength = min(as->end - addr, (u64) length);
if (as->op->write) {
rcode = as->op->write(host, nodeid, destid,
data, addr, partlength, flags);
} else {
rcode = RCODE_TYPE_ERROR;
}
data += partlength;
length -= partlength;
addr += partlength;
if ((rcode != RCODE_COMPLETE) || !length) {
break;
}
}
}
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, u16 flags)
{
struct hpsb_address_serve *as;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
list_for_each_entry(as, &host->addr_space, host_list) {
if (as->start > addr)
break;
if (as->end > addr) {
if (as->op->lock) {
rcode = as->op->lock(host, nodeid, store, addr,
data, arg, ext_tcode, flags);
} else {
rcode = RCODE_TYPE_ERROR;
}
break;
}
}
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, u16 flags)
{
struct hpsb_address_serve *as;
int rcode = RCODE_ADDRESS_ERROR;
read_lock(&addr_space_lock);
list_for_each_entry(as, &host->addr_space, host_list) {
if (as->start > addr)
break;
if (as->end > addr) {
if (as->op->lock64) {
rcode = as->op->lock64(host, nodeid, store,
addr, data, arg,
ext_tcode, flags);
} else {
rcode = RCODE_TYPE_ERROR;
}
break;
}
}
read_unlock(&addr_space_lock);
return rcode;
}
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