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linux/drivers/ieee1394/raw1394.c
Stefan Richter 45289bf6ac [PATCH] ieee1394: raw1394: remove redundant counting semaphore 
An already existing wait queue replaces raw1394's complete_sem which was
maintained in parallel to the wait queue.  The role of the semaphore's
counter is taken over by a direct check of what was really counted:  The
presence of items in the list of completed requests.

Notes:

 - raw1394_release() sleeps uninterruptibly until all requests were
   completed.  This is the same behaviour as before the patch.

 - The macros wait_event and wait_event_interruptible are called with a
   condition argument which has a side effect, i.e. manipulation of the
   requests list.  This side effect happens only if the condition is
   true.  The patch relies on the fact that wait_event[_interruptible]
   does not evaluate the condition again after it became true.

 - The diffstat looks unfavorable with respect to added lines of code.
   However 19 of them are comments, and some are due to separation of
   existing code blocks into two small helper functions.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2006-07-03 12:02:33 -04:00

3065 lines
83 KiB
C
Raw Blame History

/*
* IEEE 1394 for Linux
*
* Raw interface to the bus
*
* Copyright (C) 1999, 2000 Andreas E. Bombe
* 2001, 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
* 2002 Christian Toegel <christian.toegel@gmx.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>
* configuration ROM manipulation
* address range mapping
* adaptation for new (transparent) loopback mechanism
* sending of arbitrary async packets
* Christian Toegel <christian.toegel@gmx.at>
* address range mapping
* lock64 request
* transmit physical packet
* busreset notification control (switch on/off)
* busreset with selection of type (short/long)
* request_reply
*/
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/cdev.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <linux/compat.h>
#include "csr1212.h"
#include "highlevel.h"
#include "hosts.h"
#include "ieee1394.h"
#include "ieee1394_core.h"
#include "ieee1394_hotplug.h"
#include "ieee1394_transactions.h"
#include "ieee1394_types.h"
#include "iso.h"
#include "nodemgr.h"
#include "raw1394.h"
#include "raw1394-private.h"
#define int2ptr(x) ((void __user *)(unsigned long)x)
#define ptr2int(x) ((u64)(unsigned long)(void __user *)x)
#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
#define RAW1394_DEBUG
#endif
#ifdef RAW1394_DEBUG
#define DBGMSG(fmt, args...) \
printk(KERN_INFO "raw1394:" fmt "\n" , ## args)
#else
#define DBGMSG(fmt, args...)
#endif
static LIST_HEAD(host_info_list);
static int host_count;
static DEFINE_SPINLOCK(host_info_lock);
static atomic_t internal_generation = ATOMIC_INIT(0);
static atomic_t iso_buffer_size;
static const int iso_buffer_max = 4 * 1024 * 1024; /* 4 MB */
static struct hpsb_highlevel raw1394_highlevel;
static int arm_read(struct hpsb_host *host, int nodeid, quadlet_t * buffer,
u64 addr, size_t length, u16 flags);
static int arm_write(struct hpsb_host *host, int nodeid, int destid,
quadlet_t * data, u64 addr, size_t length, u16 flags);
static int arm_lock(struct hpsb_host *host, int nodeid, quadlet_t * store,
u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
u16 flags);
static int arm_lock64(struct hpsb_host *host, int nodeid, octlet_t * store,
u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
u16 flags);
static struct hpsb_address_ops arm_ops = {
.read = arm_read,
.write = arm_write,
.lock = arm_lock,
.lock64 = arm_lock64,
};
static void queue_complete_cb(struct pending_request *req);
static struct pending_request *__alloc_pending_request(gfp_t flags)
{
struct pending_request *req;
req = kzalloc(sizeof(*req), flags);
if (req)
INIT_LIST_HEAD(&req->list);
return req;
}
static inline struct pending_request *alloc_pending_request(void)
{
return __alloc_pending_request(SLAB_KERNEL);
}
static void free_pending_request(struct pending_request *req)
{
if (req->ibs) {
if (atomic_dec_and_test(&req->ibs->refcount)) {
atomic_sub(req->ibs->data_size, &iso_buffer_size);
kfree(req->ibs);
}
} else if (req->free_data) {
kfree(req->data);
}
hpsb_free_packet(req->packet);
kfree(req);
}
/* fi->reqlists_lock must be taken */
static void __queue_complete_req(struct pending_request *req)
{
struct file_info *fi = req->file_info;
list_move_tail(&req->list, &fi->req_complete);
wake_up(&fi->wait_complete);
}
static void queue_complete_req(struct pending_request *req)
{
unsigned long flags;
struct file_info *fi = req->file_info;
spin_lock_irqsave(&fi->reqlists_lock, flags);
__queue_complete_req(req);
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
}
static void queue_complete_cb(struct pending_request *req)
{
struct hpsb_packet *packet = req->packet;
int rcode = (packet->header[1] >> 12) & 0xf;
switch (packet->ack_code) {
case ACKX_NONE:
case ACKX_SEND_ERROR:
req->req.error = RAW1394_ERROR_SEND_ERROR;
break;
case ACKX_ABORTED:
req->req.error = RAW1394_ERROR_ABORTED;
break;
case ACKX_TIMEOUT:
req->req.error = RAW1394_ERROR_TIMEOUT;
break;
default:
req->req.error = (packet->ack_code << 16) | rcode;
break;
}
if (!((packet->ack_code == ACK_PENDING) && (rcode == RCODE_COMPLETE))) {
req->req.length = 0;
}
if ((req->req.type == RAW1394_REQ_ASYNC_READ) ||
(req->req.type == RAW1394_REQ_ASYNC_WRITE) ||
(req->req.type == RAW1394_REQ_ASYNC_STREAM) ||
(req->req.type == RAW1394_REQ_LOCK) ||
(req->req.type == RAW1394_REQ_LOCK64))
hpsb_free_tlabel(packet);
queue_complete_req(req);
}
static void add_host(struct hpsb_host *host)
{
struct host_info *hi;
unsigned long flags;
hi = kmalloc(sizeof(*hi), GFP_KERNEL);
if (hi) {
INIT_LIST_HEAD(&hi->list);
hi->host = host;
INIT_LIST_HEAD(&hi->file_info_list);
spin_lock_irqsave(&host_info_lock, flags);
list_add_tail(&hi->list, &host_info_list);
host_count++;
spin_unlock_irqrestore(&host_info_lock, flags);
}
atomic_inc(&internal_generation);
}
static struct host_info *find_host_info(struct hpsb_host *host)
{
struct host_info *hi;
list_for_each_entry(hi, &host_info_list, list)
if (hi->host == host)
return hi;
return NULL;
}
static void remove_host(struct hpsb_host *host)
{
struct host_info *hi;
unsigned long flags;
spin_lock_irqsave(&host_info_lock, flags);
hi = find_host_info(host);
if (hi != NULL) {
list_del(&hi->list);
host_count--;
/*
FIXME: address ranges should be removed
and fileinfo states should be initialized
(including setting generation to
internal-generation ...)
*/
}
spin_unlock_irqrestore(&host_info_lock, flags);
if (hi == NULL) {
printk(KERN_ERR "raw1394: attempt to remove unknown host "
"0x%p\n", host);
return;
}
kfree(hi);
atomic_inc(&internal_generation);
}
static void host_reset(struct hpsb_host *host)
{
unsigned long flags;
struct host_info *hi;
struct file_info *fi;
struct pending_request *req;
spin_lock_irqsave(&host_info_lock, flags);
hi = find_host_info(host);
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
if (fi->notification == RAW1394_NOTIFY_ON) {
req = __alloc_pending_request(SLAB_ATOMIC);
if (req != NULL) {
req->file_info = fi;
req->req.type = RAW1394_REQ_BUS_RESET;
req->req.generation =
get_hpsb_generation(host);
req->req.misc = (host->node_id << 16)
| host->node_count;
if (fi->protocol_version > 3) {
req->req.misc |=
(NODEID_TO_NODE
(host->irm_id)
<< 8);
}
queue_complete_req(req);
}
}
}
}
spin_unlock_irqrestore(&host_info_lock, flags);
}
static void iso_receive(struct hpsb_host *host, int channel, quadlet_t * data,
size_t length)
{
unsigned long flags;
struct host_info *hi;
struct file_info *fi;
struct pending_request *req, *req_next;
struct iso_block_store *ibs = NULL;
LIST_HEAD(reqs);
if ((atomic_read(&iso_buffer_size) + length) > iso_buffer_max) {
HPSB_INFO("dropped iso packet");
return;
}
spin_lock_irqsave(&host_info_lock, flags);
hi = find_host_info(host);
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
if (!(fi->listen_channels & (1ULL << channel)))
continue;
req = __alloc_pending_request(SLAB_ATOMIC);
if (!req)
break;
if (!ibs) {
ibs = kmalloc(sizeof(*ibs) + length,
SLAB_ATOMIC);
if (!ibs) {
kfree(req);
break;
}
atomic_add(length, &iso_buffer_size);
atomic_set(&ibs->refcount, 0);
ibs->data_size = length;
memcpy(ibs->data, data, length);
}
atomic_inc(&ibs->refcount);
req->file_info = fi;
req->ibs = ibs;
req->data = ibs->data;
req->req.type = RAW1394_REQ_ISO_RECEIVE;
req->req.generation = get_hpsb_generation(host);
req->req.misc = 0;
req->req.recvb = ptr2int(fi->iso_buffer);
req->req.length = min(length, fi->iso_buffer_length);
list_add_tail(&req->list, &reqs);
}
}
spin_unlock_irqrestore(&host_info_lock, flags);
list_for_each_entry_safe(req, req_next, &reqs, list)
queue_complete_req(req);
}
static void fcp_request(struct hpsb_host *host, int nodeid, int direction,
int cts, u8 * data, size_t length)
{
unsigned long flags;
struct host_info *hi;
struct file_info *fi;
struct pending_request *req, *req_next;
struct iso_block_store *ibs = NULL;
LIST_HEAD(reqs);
if ((atomic_read(&iso_buffer_size) + length) > iso_buffer_max) {
HPSB_INFO("dropped fcp request");
return;
}
spin_lock_irqsave(&host_info_lock, flags);
hi = find_host_info(host);
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
if (!fi->fcp_buffer)
continue;
req = __alloc_pending_request(SLAB_ATOMIC);
if (!req)
break;
if (!ibs) {
ibs = kmalloc(sizeof(*ibs) + length,
SLAB_ATOMIC);
if (!ibs) {
kfree(req);
break;
}
atomic_add(length, &iso_buffer_size);
atomic_set(&ibs->refcount, 0);
ibs->data_size = length;
memcpy(ibs->data, data, length);
}
atomic_inc(&ibs->refcount);
req->file_info = fi;
req->ibs = ibs;
req->data = ibs->data;
req->req.type = RAW1394_REQ_FCP_REQUEST;
req->req.generation = get_hpsb_generation(host);
req->req.misc = nodeid | (direction << 16);
req->req.recvb = ptr2int(fi->fcp_buffer);
req->req.length = length;
list_add_tail(&req->list, &reqs);
}
}
spin_unlock_irqrestore(&host_info_lock, flags);
list_for_each_entry_safe(req, req_next, &reqs, list)
queue_complete_req(req);
}
#ifdef CONFIG_COMPAT
struct compat_raw1394_req {
__u32 type;
__s32 error;
__u32 misc;
__u32 generation;
__u32 length;
__u64 address;
__u64 tag;
__u64 sendb;
__u64 recvb;
} __attribute__((packed));
static const char __user *raw1394_compat_write(const char __user *buf)
{
struct compat_raw1394_req __user *cr = (typeof(cr)) buf;
struct raw1394_request __user *r;
r = compat_alloc_user_space(sizeof(struct raw1394_request));
#define C(x) __copy_in_user(&r->x, &cr->x, sizeof(r->x))
if (copy_in_user(r, cr, sizeof(struct compat_raw1394_req)) ||
C(address) ||
C(tag) ||
C(sendb) ||
C(recvb))
return ERR_PTR(-EFAULT);
return (const char __user *)r;
}
#undef C
#define P(x) __put_user(r->x, &cr->x)
static int
raw1394_compat_read(const char __user *buf, struct raw1394_request *r)
{
struct compat_raw1394_req __user *cr = (typeof(cr)) r;
if (!access_ok(VERIFY_WRITE, cr, sizeof(struct compat_raw1394_req)) ||
P(type) ||
P(error) ||
P(misc) ||
P(generation) ||
P(length) ||
P(address) ||
P(tag) ||
P(sendb) ||
P(recvb))
return -EFAULT;
return sizeof(struct compat_raw1394_req);
}
#undef P
#endif
/* get next completed request (caller must hold fi->reqlists_lock) */
static inline struct pending_request *__next_complete_req(struct file_info *fi)
{
struct list_head *lh;
struct pending_request *req = NULL;
if (!list_empty(&fi->req_complete)) {
lh = fi->req_complete.next;
list_del(lh);
req = list_entry(lh, struct pending_request, list);
}
return req;
}
/* atomically get next completed request */
static struct pending_request *next_complete_req(struct file_info *fi)
{
unsigned long flags;
struct pending_request *req;
spin_lock_irqsave(&fi->reqlists_lock, flags);
req = __next_complete_req(fi);
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
return req;
}
static ssize_t raw1394_read(struct file *file, char __user * buffer,
size_t count, loff_t * offset_is_ignored)
{
struct file_info *fi = (struct file_info *)file->private_data;
struct pending_request *req;
ssize_t ret;
#ifdef CONFIG_COMPAT
if (count == sizeof(struct compat_raw1394_req)) {
/* ok */
} else
#endif
if (count != sizeof(struct raw1394_request)) {
return -EINVAL;
}
if (!access_ok(VERIFY_WRITE, buffer, count)) {
return -EFAULT;
}
if (file->f_flags & O_NONBLOCK) {
if (!(req = next_complete_req(fi)))
return -EAGAIN;
} else {
/*
* NB: We call the macro wait_event_interruptible() with a
* condition argument with side effect. This is only possible
* because the side effect does not occur until the condition
* became true, and wait_event_interruptible() won't evaluate
* the condition again after that.
*/
if (wait_event_interruptible(fi->wait_complete,
(req = next_complete_req(fi))))
return -ERESTARTSYS;
}
if (req->req.length) {
if (copy_to_user(int2ptr(req->req.recvb), req->data,
req->req.length)) {
req->req.error = RAW1394_ERROR_MEMFAULT;
}
}
#ifdef CONFIG_COMPAT
if (count == sizeof(struct compat_raw1394_req) &&
sizeof(struct compat_raw1394_req) !=
sizeof(struct raw1394_request)) {
ret = raw1394_compat_read(buffer, &req->req);
} else
#endif
{
if (copy_to_user(buffer, &req->req, sizeof(req->req))) {
ret = -EFAULT;
goto out;
}
ret = (ssize_t) sizeof(struct raw1394_request);
}
out:
free_pending_request(req);
return ret;
}
static int state_opened(struct file_info *fi, struct pending_request *req)
{
if (req->req.type == RAW1394_REQ_INITIALIZE) {
switch (req->req.misc) {
case RAW1394_KERNELAPI_VERSION:
case 3:
fi->state = initialized;
fi->protocol_version = req->req.misc;
req->req.error = RAW1394_ERROR_NONE;
req->req.generation = atomic_read(&internal_generation);
break;
default:
req->req.error = RAW1394_ERROR_COMPAT;
req->req.misc = RAW1394_KERNELAPI_VERSION;
}
} else {
req->req.error = RAW1394_ERROR_STATE_ORDER;
}
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
static int state_initialized(struct file_info *fi, struct pending_request *req)
{
unsigned long flags;
struct host_info *hi;
struct raw1394_khost_list *khl;
if (req->req.generation != atomic_read(&internal_generation)) {
req->req.error = RAW1394_ERROR_GENERATION;
req->req.generation = atomic_read(&internal_generation);
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
switch (req->req.type) {
case RAW1394_REQ_LIST_CARDS:
spin_lock_irqsave(&host_info_lock, flags);
khl = kmalloc(sizeof(*khl) * host_count, SLAB_ATOMIC);
if (khl) {
req->req.misc = host_count;
req->data = (quadlet_t *) khl;
list_for_each_entry(hi, &host_info_list, list) {
khl->nodes = hi->host->node_count;
strcpy(khl->name, hi->host->driver->name);
khl++;
}
}
spin_unlock_irqrestore(&host_info_lock, flags);
if (khl) {
req->req.error = RAW1394_ERROR_NONE;
req->req.length = min(req->req.length,
(u32) (sizeof
(struct raw1394_khost_list)
* req->req.misc));
req->free_data = 1;
} else {
return -ENOMEM;
}
break;
case RAW1394_REQ_SET_CARD:
spin_lock_irqsave(&host_info_lock, flags);
if (req->req.misc < host_count) {
list_for_each_entry(hi, &host_info_list, list) {
if (!req->req.misc--)
break;
}
get_device(&hi->host->device); // XXX Need to handle failure case
list_add_tail(&fi->list, &hi->file_info_list);
fi->host = hi->host;
fi->state = connected;
req->req.error = RAW1394_ERROR_NONE;
req->req.generation = get_hpsb_generation(fi->host);
req->req.misc = (fi->host->node_id << 16)
| fi->host->node_count;
if (fi->protocol_version > 3) {
req->req.misc |=
NODEID_TO_NODE(fi->host->irm_id) << 8;
}
} else {
req->req.error = RAW1394_ERROR_INVALID_ARG;
}
spin_unlock_irqrestore(&host_info_lock, flags);
req->req.length = 0;
break;
default:
req->req.error = RAW1394_ERROR_STATE_ORDER;
req->req.length = 0;
break;
}
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
static void handle_iso_listen(struct file_info *fi, struct pending_request *req)
{
int channel = req->req.misc;
if ((channel > 63) || (channel < -64)) {
req->req.error = RAW1394_ERROR_INVALID_ARG;
} else if (channel >= 0) {
/* allocate channel req.misc */
if (fi->listen_channels & (1ULL << channel)) {
req->req.error = RAW1394_ERROR_ALREADY;
} else {
if (hpsb_listen_channel
(&raw1394_highlevel, fi->host, channel)) {
req->req.error = RAW1394_ERROR_ALREADY;
} else {
fi->listen_channels |= 1ULL << channel;
fi->iso_buffer = int2ptr(req->req.recvb);
fi->iso_buffer_length = req->req.length;
}
}
} else {
/* deallocate channel (one's complement neg) req.misc */
channel = ~channel;
if (fi->listen_channels & (1ULL << channel)) {
hpsb_unlisten_channel(&raw1394_highlevel, fi->host,
channel);
fi->listen_channels &= ~(1ULL << channel);
} else {
req->req.error = RAW1394_ERROR_INVALID_ARG;
}
}
req->req.length = 0;
queue_complete_req(req);
}
static void handle_fcp_listen(struct file_info *fi, struct pending_request *req)
{
if (req->req.misc) {
if (fi->fcp_buffer) {
req->req.error = RAW1394_ERROR_ALREADY;
} else {
fi->fcp_buffer = int2ptr(req->req.recvb);
}
} else {
if (!fi->fcp_buffer) {
req->req.error = RAW1394_ERROR_ALREADY;
} else {
fi->fcp_buffer = NULL;
}
}
req->req.length = 0;
queue_complete_req(req);
}
static int handle_async_request(struct file_info *fi,
struct pending_request *req, int node)
{
unsigned long flags;
struct hpsb_packet *packet = NULL;
u64 addr = req->req.address & 0xffffffffffffULL;
switch (req->req.type) {
case RAW1394_REQ_ASYNC_READ:
DBGMSG("read_request called");
packet =
hpsb_make_readpacket(fi->host, node, addr, req->req.length);
if (!packet)
return -ENOMEM;
if (req->req.length == 4)
req->data = &packet->header[3];
else
req->data = packet->data;
break;
case RAW1394_REQ_ASYNC_WRITE:
DBGMSG("write_request called");
packet = hpsb_make_writepacket(fi->host, node, addr, NULL,
req->req.length);
if (!packet)
return -ENOMEM;
if (req->req.length == 4) {
if (copy_from_user
(&packet->header[3], int2ptr(req->req.sendb),
req->req.length))
req->req.error = RAW1394_ERROR_MEMFAULT;
} else {
if (copy_from_user
(packet->data, int2ptr(req->req.sendb),
req->req.length))
req->req.error = RAW1394_ERROR_MEMFAULT;
}
req->req.length = 0;
break;
case RAW1394_REQ_ASYNC_STREAM:
DBGMSG("stream_request called");
packet =
hpsb_make_streampacket(fi->host, NULL, req->req.length,
node & 0x3f /*channel */ ,
(req->req.misc >> 16) & 0x3,
req->req.misc & 0xf);
if (!packet)
return -ENOMEM;
if (copy_from_user(packet->data, int2ptr(req->req.sendb),
req->req.length))
req->req.error = RAW1394_ERROR_MEMFAULT;
req->req.length = 0;
break;
case RAW1394_REQ_LOCK:
DBGMSG("lock_request called");
if ((req->req.misc == EXTCODE_FETCH_ADD)
|| (req->req.misc == EXTCODE_LITTLE_ADD)) {
if (req->req.length != 4) {
req->req.error = RAW1394_ERROR_INVALID_ARG;
break;
}
} else {
if (req->req.length != 8) {
req->req.error = RAW1394_ERROR_INVALID_ARG;
break;
}
}
packet = hpsb_make_lockpacket(fi->host, node, addr,
req->req.misc, NULL, 0);
if (!packet)
return -ENOMEM;
if (copy_from_user(packet->data, int2ptr(req->req.sendb),
req->req.length)) {
req->req.error = RAW1394_ERROR_MEMFAULT;
break;
}
req->data = packet->data;
req->req.length = 4;
break;
case RAW1394_REQ_LOCK64:
DBGMSG("lock64_request called");
if ((req->req.misc == EXTCODE_FETCH_ADD)
|| (req->req.misc == EXTCODE_LITTLE_ADD)) {
if (req->req.length != 8) {
req->req.error = RAW1394_ERROR_INVALID_ARG;
break;
}
} else {
if (req->req.length != 16) {
req->req.error = RAW1394_ERROR_INVALID_ARG;
break;
}
}
packet = hpsb_make_lock64packet(fi->host, node, addr,
req->req.misc, NULL, 0);
if (!packet)
return -ENOMEM;
if (copy_from_user(packet->data, int2ptr(req->req.sendb),
req->req.length)) {
req->req.error = RAW1394_ERROR_MEMFAULT;
break;
}
req->data = packet->data;
req->req.length = 8;
break;
default:
req->req.error = RAW1394_ERROR_STATE_ORDER;
}
req->packet = packet;
if (req->req.error) {
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
hpsb_set_packet_complete_task(packet,
(void (*)(void *))queue_complete_cb, req);
spin_lock_irqsave(&fi->reqlists_lock, flags);
list_add_tail(&req->list, &fi->req_pending);
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
packet->generation = req->req.generation;
if (hpsb_send_packet(packet) < 0) {
req->req.error = RAW1394_ERROR_SEND_ERROR;
req->req.length = 0;
hpsb_free_tlabel(packet);
queue_complete_req(req);
}
return sizeof(struct raw1394_request);
}
static int handle_iso_send(struct file_info *fi, struct pending_request *req,
int channel)
{
unsigned long flags;
struct hpsb_packet *packet;
packet = hpsb_make_isopacket(fi->host, req->req.length, channel & 0x3f,
(req->req.misc >> 16) & 0x3,
req->req.misc & 0xf);
if (!packet)
return -ENOMEM;
packet->speed_code = req->req.address & 0x3;
req->packet = packet;
if (copy_from_user(packet->data, int2ptr(req->req.sendb),
req->req.length)) {
req->req.error = RAW1394_ERROR_MEMFAULT;
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
req->req.length = 0;
hpsb_set_packet_complete_task(packet,
(void (*)(void *))queue_complete_req,
req);
spin_lock_irqsave(&fi->reqlists_lock, flags);
list_add_tail(&req->list, &fi->req_pending);
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
/* Update the generation of the packet just before sending. */
packet->generation = req->req.generation;
if (hpsb_send_packet(packet) < 0) {
req->req.error = RAW1394_ERROR_SEND_ERROR;
queue_complete_req(req);
}
return sizeof(struct raw1394_request);
}
static int handle_async_send(struct file_info *fi, struct pending_request *req)
{
unsigned long flags;
struct hpsb_packet *packet;
int header_length = req->req.misc & 0xffff;
int expect_response = req->req.misc >> 16;
if ((header_length > req->req.length) || (header_length < 12)) {
req->req.error = RAW1394_ERROR_INVALID_ARG;
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
packet = hpsb_alloc_packet(req->req.length - header_length);
req->packet = packet;
if (!packet)
return -ENOMEM;
if (copy_from_user(packet->header, int2ptr(req->req.sendb),
header_length)) {
req->req.error = RAW1394_ERROR_MEMFAULT;
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
if (copy_from_user
(packet->data, int2ptr(req->req.sendb) + header_length,
packet->data_size)) {
req->req.error = RAW1394_ERROR_MEMFAULT;
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
packet->type = hpsb_async;
packet->node_id = packet->header[0] >> 16;
packet->tcode = (packet->header[0] >> 4) & 0xf;
packet->tlabel = (packet->header[0] >> 10) & 0x3f;
packet->host = fi->host;
packet->expect_response = expect_response;
packet->header_size = header_length;
packet->data_size = req->req.length - header_length;
req->req.length = 0;
hpsb_set_packet_complete_task(packet,
(void (*)(void *))queue_complete_cb, req);
spin_lock_irqsave(&fi->reqlists_lock, flags);
list_add_tail(&req->list, &fi->req_pending);
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
/* Update the generation of the packet just before sending. */
packet->generation = req->req.generation;
if (hpsb_send_packet(packet) < 0) {
req->req.error = RAW1394_ERROR_SEND_ERROR;
queue_complete_req(req);
}
return sizeof(struct raw1394_request);
}
static int arm_read(struct hpsb_host *host, int nodeid, quadlet_t * buffer,
u64 addr, size_t length, u16 flags)
{
unsigned long irqflags;
struct pending_request *req;
struct host_info *hi;
struct file_info *fi = NULL;
struct list_head *entry;
struct arm_addr *arm_addr = NULL;
struct arm_request *arm_req = NULL;
struct arm_response *arm_resp = NULL;
int found = 0, size = 0, rcode = -1;
struct arm_request_response *arm_req_resp = NULL;
DBGMSG("arm_read called by node: %X"
"addr: %4.4x %8.8x length: %Zu", nodeid,
(u16) ((addr >> 32) & 0xFFFF), (u32) (addr & 0xFFFFFFFF),
length);
spin_lock_irqsave(&host_info_lock, irqflags);
hi = find_host_info(host); /* search address-entry */
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
entry = fi->addr_list.next;
while (entry != &(fi->addr_list)) {
arm_addr =
list_entry(entry, struct arm_addr,
addr_list);
if (((arm_addr->start) <= (addr))
&& ((arm_addr->end) >= (addr + length))) {
found = 1;
break;
}
entry = entry->next;
}
if (found) {
break;
}
}
}
rcode = -1;
if (!found) {
printk(KERN_ERR "raw1394: arm_read FAILED addr_entry not found"
" -> rcode_address_error\n");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_ADDRESS_ERROR);
} else {
DBGMSG("arm_read addr_entry FOUND");
}
if (arm_addr->rec_length < length) {
DBGMSG("arm_read blocklength too big -> rcode_data_error");
rcode = RCODE_DATA_ERROR; /* hardware error, data is unavailable */
}
if (rcode == -1) {
if (arm_addr->access_rights & ARM_READ) {
if (!(arm_addr->client_transactions & ARM_READ)) {
memcpy(buffer,
(arm_addr->addr_space_buffer) + (addr -
(arm_addr->
start)),
length);
DBGMSG("arm_read -> (rcode_complete)");
rcode = RCODE_COMPLETE;
}
} else {
rcode = RCODE_TYPE_ERROR; /* function not allowed */
DBGMSG("arm_read -> rcode_type_error (access denied)");
}
}
if (arm_addr->notification_options & ARM_READ) {
DBGMSG("arm_read -> entering notification-section");
req = __alloc_pending_request(SLAB_ATOMIC);
if (!req) {
DBGMSG("arm_read -> rcode_conflict_error");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request may be retried */
}
if (rcode == RCODE_COMPLETE) {
size =
sizeof(struct arm_request) +
sizeof(struct arm_response) +
length * sizeof(byte_t) +
sizeof(struct arm_request_response);
} else {
size =
sizeof(struct arm_request) +
sizeof(struct arm_response) +
sizeof(struct arm_request_response);
}
req->data = kmalloc(size, SLAB_ATOMIC);
if (!(req->data)) {
free_pending_request(req);
DBGMSG("arm_read -> rcode_conflict_error");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request may be retried */
}
req->free_data = 1;
req->file_info = fi;
req->req.type = RAW1394_REQ_ARM;
req->req.generation = get_hpsb_generation(host);
req->req.misc =
(((length << 16) & (0xFFFF0000)) | (ARM_READ & 0xFF));
req->req.tag = arm_addr->arm_tag;
req->req.recvb = arm_addr->recvb;
req->req.length = size;
arm_req_resp = (struct arm_request_response *)(req->data);
arm_req = (struct arm_request *)((byte_t *) (req->data) +
(sizeof
(struct
arm_request_response)));
arm_resp =
(struct arm_response *)((byte_t *) (arm_req) +
(sizeof(struct arm_request)));
arm_req->buffer = NULL;
arm_resp->buffer = NULL;
if (rcode == RCODE_COMPLETE) {
byte_t *buf =
(byte_t *) arm_resp + sizeof(struct arm_response);
memcpy(buf,
(arm_addr->addr_space_buffer) + (addr -
(arm_addr->
start)),
length);
arm_resp->buffer =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request) +
sizeof(struct arm_response));
}
arm_resp->buffer_length =
(rcode == RCODE_COMPLETE) ? length : 0;
arm_resp->response_code = rcode;
arm_req->buffer_length = 0;
arm_req->generation = req->req.generation;
arm_req->extended_transaction_code = 0;
arm_req->destination_offset = addr;
arm_req->source_nodeid = nodeid;
arm_req->destination_nodeid = host->node_id;
arm_req->tlabel = (flags >> 10) & 0x3f;
arm_req->tcode = (flags >> 4) & 0x0f;
arm_req_resp->request = int2ptr((arm_addr->recvb) +
sizeof(struct
arm_request_response));
arm_req_resp->response =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request));
queue_complete_req(req);
}
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (rcode);
}
static int arm_write(struct hpsb_host *host, int nodeid, int destid,
quadlet_t * data, u64 addr, size_t length, u16 flags)
{
unsigned long irqflags;
struct pending_request *req;
struct host_info *hi;
struct file_info *fi = NULL;
struct list_head *entry;
struct arm_addr *arm_addr = NULL;
struct arm_request *arm_req = NULL;
struct arm_response *arm_resp = NULL;
int found = 0, size = 0, rcode = -1, length_conflict = 0;
struct arm_request_response *arm_req_resp = NULL;
DBGMSG("arm_write called by node: %X"
"addr: %4.4x %8.8x length: %Zu", nodeid,
(u16) ((addr >> 32) & 0xFFFF), (u32) (addr & 0xFFFFFFFF),
length);
spin_lock_irqsave(&host_info_lock, irqflags);
hi = find_host_info(host); /* search address-entry */
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
entry = fi->addr_list.next;
while (entry != &(fi->addr_list)) {
arm_addr =
list_entry(entry, struct arm_addr,
addr_list);
if (((arm_addr->start) <= (addr))
&& ((arm_addr->end) >= (addr + length))) {
found = 1;
break;
}
entry = entry->next;
}
if (found) {
break;
}
}
}
rcode = -1;
if (!found) {
printk(KERN_ERR "raw1394: arm_write FAILED addr_entry not found"
" -> rcode_address_error\n");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_ADDRESS_ERROR);
} else {
DBGMSG("arm_write addr_entry FOUND");
}
if (arm_addr->rec_length < length) {
DBGMSG("arm_write blocklength too big -> rcode_data_error");
length_conflict = 1;
rcode = RCODE_DATA_ERROR; /* hardware error, data is unavailable */
}
if (rcode == -1) {
if (arm_addr->access_rights & ARM_WRITE) {
if (!(arm_addr->client_transactions & ARM_WRITE)) {
memcpy((arm_addr->addr_space_buffer) +
(addr - (arm_addr->start)), data,
length);
DBGMSG("arm_write -> (rcode_complete)");
rcode = RCODE_COMPLETE;
}
} else {
rcode = RCODE_TYPE_ERROR; /* function not allowed */
DBGMSG("arm_write -> rcode_type_error (access denied)");
}
}
if (arm_addr->notification_options & ARM_WRITE) {
DBGMSG("arm_write -> entering notification-section");
req = __alloc_pending_request(SLAB_ATOMIC);
if (!req) {
DBGMSG("arm_write -> rcode_conflict_error");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request my be retried */
}
size =
sizeof(struct arm_request) + sizeof(struct arm_response) +
(length) * sizeof(byte_t) +
sizeof(struct arm_request_response);
req->data = kmalloc(size, SLAB_ATOMIC);
if (!(req->data)) {
free_pending_request(req);
DBGMSG("arm_write -> rcode_conflict_error");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request may be retried */
}
req->free_data = 1;
req->file_info = fi;
req->req.type = RAW1394_REQ_ARM;
req->req.generation = get_hpsb_generation(host);
req->req.misc =
(((length << 16) & (0xFFFF0000)) | (ARM_WRITE & 0xFF));
req->req.tag = arm_addr->arm_tag;
req->req.recvb = arm_addr->recvb;
req->req.length = size;
arm_req_resp = (struct arm_request_response *)(req->data);
arm_req = (struct arm_request *)((byte_t *) (req->data) +
(sizeof
(struct
arm_request_response)));
arm_resp =
(struct arm_response *)((byte_t *) (arm_req) +
(sizeof(struct arm_request)));
arm_resp->buffer = NULL;
memcpy((byte_t *) arm_resp + sizeof(struct arm_response),
data, length);
arm_req->buffer = int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request) +
sizeof(struct arm_response));
arm_req->buffer_length = length;
arm_req->generation = req->req.generation;
arm_req->extended_transaction_code = 0;
arm_req->destination_offset = addr;
arm_req->source_nodeid = nodeid;
arm_req->destination_nodeid = destid;
arm_req->tlabel = (flags >> 10) & 0x3f;
arm_req->tcode = (flags >> 4) & 0x0f;
arm_resp->buffer_length = 0;
arm_resp->response_code = rcode;
arm_req_resp->request = int2ptr((arm_addr->recvb) +
sizeof(struct
arm_request_response));
arm_req_resp->response =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request));
queue_complete_req(req);
}
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (rcode);
}
static int arm_lock(struct hpsb_host *host, int nodeid, quadlet_t * store,
u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
u16 flags)
{
unsigned long irqflags;
struct pending_request *req;
struct host_info *hi;
struct file_info *fi = NULL;
struct list_head *entry;
struct arm_addr *arm_addr = NULL;
struct arm_request *arm_req = NULL;
struct arm_response *arm_resp = NULL;
int found = 0, size = 0, rcode = -1;
quadlet_t old, new;
struct arm_request_response *arm_req_resp = NULL;
if (((ext_tcode & 0xFF) == EXTCODE_FETCH_ADD) ||
((ext_tcode & 0xFF) == EXTCODE_LITTLE_ADD)) {
DBGMSG("arm_lock called by node: %X "
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X",
nodeid, (u16) ((addr >> 32) & 0xFFFF),
(u32) (addr & 0xFFFFFFFF), ext_tcode & 0xFF,
be32_to_cpu(data));
} else {
DBGMSG("arm_lock called by node: %X "
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X arg: %8.8X",
nodeid, (u16) ((addr >> 32) & 0xFFFF),
(u32) (addr & 0xFFFFFFFF), ext_tcode & 0xFF,
be32_to_cpu(data), be32_to_cpu(arg));
}
spin_lock_irqsave(&host_info_lock, irqflags);
hi = find_host_info(host); /* search address-entry */
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
entry = fi->addr_list.next;
while (entry != &(fi->addr_list)) {
arm_addr =
list_entry(entry, struct arm_addr,
addr_list);
if (((arm_addr->start) <= (addr))
&& ((arm_addr->end) >=
(addr + sizeof(*store)))) {
found = 1;
break;
}
entry = entry->next;
}
if (found) {
break;
}
}
}
rcode = -1;
if (!found) {
printk(KERN_ERR "raw1394: arm_lock FAILED addr_entry not found"
" -> rcode_address_error\n");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_ADDRESS_ERROR);
} else {
DBGMSG("arm_lock addr_entry FOUND");
}
if (rcode == -1) {
if (arm_addr->access_rights & ARM_LOCK) {
if (!(arm_addr->client_transactions & ARM_LOCK)) {
memcpy(&old,
(arm_addr->addr_space_buffer) + (addr -
(arm_addr->
start)),
sizeof(old));
switch (ext_tcode) {
case (EXTCODE_MASK_SWAP):
new = data | (old & ~arg);
break;
case (EXTCODE_COMPARE_SWAP):
if (old == arg) {
new = data;
} else {
new = old;
}
break;
case (EXTCODE_FETCH_ADD):
new =
cpu_to_be32(be32_to_cpu(data) +
be32_to_cpu(old));
break;
case (EXTCODE_LITTLE_ADD):
new =
cpu_to_le32(le32_to_cpu(data) +
le32_to_cpu(old));
break;
case (EXTCODE_BOUNDED_ADD):
if (old != arg) {
new =
cpu_to_be32(be32_to_cpu
(data) +
be32_to_cpu
(old));
} else {
new = old;
}
break;
case (EXTCODE_WRAP_ADD):
if (old != arg) {
new =
cpu_to_be32(be32_to_cpu
(data) +
be32_to_cpu
(old));
} else {
new = data;
}
break;
default:
rcode = RCODE_TYPE_ERROR; /* function not allowed */
printk(KERN_ERR
"raw1394: arm_lock FAILED "
"ext_tcode not allowed -> rcode_type_error\n");
break;
} /*switch */
if (rcode == -1) {
DBGMSG("arm_lock -> (rcode_complete)");
rcode = RCODE_COMPLETE;
memcpy(store, &old, sizeof(*store));
memcpy((arm_addr->addr_space_buffer) +
(addr - (arm_addr->start)),
&new, sizeof(*store));
}
}
} else {
rcode = RCODE_TYPE_ERROR; /* function not allowed */
DBGMSG("arm_lock -> rcode_type_error (access denied)");
}
}
if (arm_addr->notification_options & ARM_LOCK) {
byte_t *buf1, *buf2;
DBGMSG("arm_lock -> entering notification-section");
req = __alloc_pending_request(SLAB_ATOMIC);
if (!req) {
DBGMSG("arm_lock -> rcode_conflict_error");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request may be retried */
}
size = sizeof(struct arm_request) + sizeof(struct arm_response) + 3 * sizeof(*store) + sizeof(struct arm_request_response); /* maximum */
req->data = kmalloc(size, SLAB_ATOMIC);
if (!(req->data)) {
free_pending_request(req);
DBGMSG("arm_lock -> rcode_conflict_error");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request may be retried */
}
req->free_data = 1;
arm_req_resp = (struct arm_request_response *)(req->data);
arm_req = (struct arm_request *)((byte_t *) (req->data) +
(sizeof
(struct
arm_request_response)));
arm_resp =
(struct arm_response *)((byte_t *) (arm_req) +
(sizeof(struct arm_request)));
buf1 = (byte_t *) arm_resp + sizeof(struct arm_response);
buf2 = buf1 + 2 * sizeof(*store);
if ((ext_tcode == EXTCODE_FETCH_ADD) ||
(ext_tcode == EXTCODE_LITTLE_ADD)) {
arm_req->buffer_length = sizeof(*store);
memcpy(buf1, &data, sizeof(*store));
} else {
arm_req->buffer_length = 2 * sizeof(*store);
memcpy(buf1, &arg, sizeof(*store));
memcpy(buf1 + sizeof(*store), &data, sizeof(*store));
}
if (rcode == RCODE_COMPLETE) {
arm_resp->buffer_length = sizeof(*store);
memcpy(buf2, &old, sizeof(*store));
} else {
arm_resp->buffer_length = 0;
}
req->file_info = fi;
req->req.type = RAW1394_REQ_ARM;
req->req.generation = get_hpsb_generation(host);
req->req.misc = ((((sizeof(*store)) << 16) & (0xFFFF0000)) |
(ARM_LOCK & 0xFF));
req->req.tag = arm_addr->arm_tag;
req->req.recvb = arm_addr->recvb;
req->req.length = size;
arm_req->generation = req->req.generation;
arm_req->extended_transaction_code = ext_tcode;
arm_req->destination_offset = addr;
arm_req->source_nodeid = nodeid;
arm_req->destination_nodeid = host->node_id;
arm_req->tlabel = (flags >> 10) & 0x3f;
arm_req->tcode = (flags >> 4) & 0x0f;
arm_resp->response_code = rcode;
arm_req_resp->request = int2ptr((arm_addr->recvb) +
sizeof(struct
arm_request_response));
arm_req_resp->response =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request));
arm_req->buffer =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request) +
sizeof(struct arm_response));
arm_resp->buffer =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request) +
sizeof(struct arm_response) + 2 * sizeof(*store));
queue_complete_req(req);
}
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (rcode);
}
static int arm_lock64(struct hpsb_host *host, int nodeid, octlet_t * store,
u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
u16 flags)
{
unsigned long irqflags;
struct pending_request *req;
struct host_info *hi;
struct file_info *fi = NULL;
struct list_head *entry;
struct arm_addr *arm_addr = NULL;
struct arm_request *arm_req = NULL;
struct arm_response *arm_resp = NULL;
int found = 0, size = 0, rcode = -1;
octlet_t old, new;
struct arm_request_response *arm_req_resp = NULL;
if (((ext_tcode & 0xFF) == EXTCODE_FETCH_ADD) ||
((ext_tcode & 0xFF) == EXTCODE_LITTLE_ADD)) {
DBGMSG("arm_lock64 called by node: %X "
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X %8.8X ",
nodeid, (u16) ((addr >> 32) & 0xFFFF),
(u32) (addr & 0xFFFFFFFF),
ext_tcode & 0xFF,
(u32) ((be64_to_cpu(data) >> 32) & 0xFFFFFFFF),
(u32) (be64_to_cpu(data) & 0xFFFFFFFF));
} else {
DBGMSG("arm_lock64 called by node: %X "
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X %8.8X arg: "
"%8.8X %8.8X ",
nodeid, (u16) ((addr >> 32) & 0xFFFF),
(u32) (addr & 0xFFFFFFFF),
ext_tcode & 0xFF,
(u32) ((be64_to_cpu(data) >> 32) & 0xFFFFFFFF),
(u32) (be64_to_cpu(data) & 0xFFFFFFFF),
(u32) ((be64_to_cpu(arg) >> 32) & 0xFFFFFFFF),
(u32) (be64_to_cpu(arg) & 0xFFFFFFFF));
}
spin_lock_irqsave(&host_info_lock, irqflags);
hi = find_host_info(host); /* search addressentry in file_info's for host */
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
entry = fi->addr_list.next;
while (entry != &(fi->addr_list)) {
arm_addr =
list_entry(entry, struct arm_addr,
addr_list);
if (((arm_addr->start) <= (addr))
&& ((arm_addr->end) >=
(addr + sizeof(*store)))) {
found = 1;
break;
}
entry = entry->next;
}
if (found) {
break;
}
}
}
rcode = -1;
if (!found) {
printk(KERN_ERR
"raw1394: arm_lock64 FAILED addr_entry not found"
" -> rcode_address_error\n");
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (RCODE_ADDRESS_ERROR);
} else {
DBGMSG("arm_lock64 addr_entry FOUND");
}
if (rcode == -1) {
if (arm_addr->access_rights & ARM_LOCK) {
if (!(arm_addr->client_transactions & ARM_LOCK)) {
memcpy(&old,
(arm_addr->addr_space_buffer) + (addr -
(arm_addr->
start)),
sizeof(old));
switch (ext_tcode) {
case (EXTCODE_MASK_SWAP):
new = data | (old & ~arg);
break;
case (EXTCODE_COMPARE_SWAP):
if (old == arg) {
new = data;
} else {
new = old;
}
break;
case (EXTCODE_FETCH_ADD):
new =
cpu_to_be64(be64_to_cpu(data) +
be64_to_cpu(old));
break;
case (EXTCODE_LITTLE_ADD):
new =
cpu_to_le64(le64_to_cpu(data) +
le64_to_cpu(old));
break;
case (EXTCODE_BOUNDED_ADD):
if (old != arg) {
new =
cpu_to_be64(be64_to_cpu
(data) +
be64_to_cpu
(old));
} else {
new = old;
}
break;
case (EXTCODE_WRAP_ADD):
if (old != arg) {
new =
cpu_to_be64(be64_to_cpu
(data) +
be64_to_cpu
(old));
} else {
new = data;
}
break;
default:
printk(KERN_ERR
"raw1394: arm_lock64 FAILED "
"ext_tcode not allowed -> rcode_type_error\n");
rcode = RCODE_TYPE_ERROR; /* function not allowed */
break;
} /*switch */
if (rcode == -1) {
DBGMSG
("arm_lock64 -> (rcode_complete)");
rcode = RCODE_COMPLETE;
memcpy(store, &old, sizeof(*store));
memcpy((arm_addr->addr_space_buffer) +
(addr - (arm_addr->start)),
&new, sizeof(*store));
}
}
} else {
rcode = RCODE_TYPE_ERROR; /* function not allowed */
DBGMSG
("arm_lock64 -> rcode_type_error (access denied)");
}
}
if (arm_addr->notification_options & ARM_LOCK) {
byte_t *buf1, *buf2;
DBGMSG("arm_lock64 -> entering notification-section");
req = __alloc_pending_request(SLAB_ATOMIC);
if (!req) {
spin_unlock_irqrestore(&host_info_lock, irqflags);
DBGMSG("arm_lock64 -> rcode_conflict_error");
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request may be retried */
}
size = sizeof(struct arm_request) + sizeof(struct arm_response) + 3 * sizeof(*store) + sizeof(struct arm_request_response); /* maximum */
req->data = kmalloc(size, SLAB_ATOMIC);
if (!(req->data)) {
free_pending_request(req);
spin_unlock_irqrestore(&host_info_lock, irqflags);
DBGMSG("arm_lock64 -> rcode_conflict_error");
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
The request may be retried */
}
req->free_data = 1;
arm_req_resp = (struct arm_request_response *)(req->data);
arm_req = (struct arm_request *)((byte_t *) (req->data) +
(sizeof
(struct
arm_request_response)));
arm_resp =
(struct arm_response *)((byte_t *) (arm_req) +
(sizeof(struct arm_request)));
buf1 = (byte_t *) arm_resp + sizeof(struct arm_response);
buf2 = buf1 + 2 * sizeof(*store);
if ((ext_tcode == EXTCODE_FETCH_ADD) ||
(ext_tcode == EXTCODE_LITTLE_ADD)) {
arm_req->buffer_length = sizeof(*store);
memcpy(buf1, &data, sizeof(*store));
} else {
arm_req->buffer_length = 2 * sizeof(*store);
memcpy(buf1, &arg, sizeof(*store));
memcpy(buf1 + sizeof(*store), &data, sizeof(*store));
}
if (rcode == RCODE_COMPLETE) {
arm_resp->buffer_length = sizeof(*store);
memcpy(buf2, &old, sizeof(*store));
} else {
arm_resp->buffer_length = 0;
}
req->file_info = fi;
req->req.type = RAW1394_REQ_ARM;
req->req.generation = get_hpsb_generation(host);
req->req.misc = ((((sizeof(*store)) << 16) & (0xFFFF0000)) |
(ARM_LOCK & 0xFF));
req->req.tag = arm_addr->arm_tag;
req->req.recvb = arm_addr->recvb;
req->req.length = size;
arm_req->generation = req->req.generation;
arm_req->extended_transaction_code = ext_tcode;
arm_req->destination_offset = addr;
arm_req->source_nodeid = nodeid;
arm_req->destination_nodeid = host->node_id;
arm_req->tlabel = (flags >> 10) & 0x3f;
arm_req->tcode = (flags >> 4) & 0x0f;
arm_resp->response_code = rcode;
arm_req_resp->request = int2ptr((arm_addr->recvb) +
sizeof(struct
arm_request_response));
arm_req_resp->response =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request));
arm_req->buffer =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request) +
sizeof(struct arm_response));
arm_resp->buffer =
int2ptr((arm_addr->recvb) +
sizeof(struct arm_request_response) +
sizeof(struct arm_request) +
sizeof(struct arm_response) + 2 * sizeof(*store));
queue_complete_req(req);
}
spin_unlock_irqrestore(&host_info_lock, irqflags);
return (rcode);
}
static int arm_register(struct file_info *fi, struct pending_request *req)
{
int retval;
struct arm_addr *addr;
struct host_info *hi;
struct file_info *fi_hlp = NULL;
struct list_head *entry;
struct arm_addr *arm_addr = NULL;
int same_host, another_host;
unsigned long flags;
DBGMSG("arm_register called "
"addr(Offset): %8.8x %8.8x length: %u "
"rights: %2.2X notify: %2.2X "
"max_blk_len: %4.4X",
(u32) ((req->req.address >> 32) & 0xFFFF),
(u32) (req->req.address & 0xFFFFFFFF),
req->req.length, ((req->req.misc >> 8) & 0xFF),
(req->req.misc & 0xFF), ((req->req.misc >> 16) & 0xFFFF));
/* check addressrange */
if ((((req->req.address) & ~(0xFFFFFFFFFFFFULL)) != 0) ||
(((req->req.address + req->req.length) & ~(0xFFFFFFFFFFFFULL)) !=
0)) {
req->req.length = 0;
return (-EINVAL);
}
/* addr-list-entry for fileinfo */
addr = kmalloc(sizeof(*addr), SLAB_KERNEL);
if (!addr) {
req->req.length = 0;
return (-ENOMEM);
}
/* allocation of addr_space_buffer */
addr->addr_space_buffer = vmalloc(req->req.length);
if (!(addr->addr_space_buffer)) {
kfree(addr);
req->req.length = 0;
return (-ENOMEM);
}
/* initialization of addr_space_buffer */
if ((req->req.sendb) == (unsigned long)NULL) {
/* init: set 0 */
memset(addr->addr_space_buffer, 0, req->req.length);
} else {
/* init: user -> kernel */
if (copy_from_user
(addr->addr_space_buffer, int2ptr(req->req.sendb),
req->req.length)) {
vfree(addr->addr_space_buffer);
kfree(addr);
return (-EFAULT);
}
}
INIT_LIST_HEAD(&addr->addr_list);
addr->arm_tag = req->req.tag;
addr->start = req->req.address;
addr->end = req->req.address + req->req.length;
addr->access_rights = (u8) (req->req.misc & 0x0F);
addr->notification_options = (u8) ((req->req.misc >> 4) & 0x0F);
addr->client_transactions = (u8) ((req->req.misc >> 8) & 0x0F);
addr->access_rights |= addr->client_transactions;
addr->notification_options |= addr->client_transactions;
addr->recvb = req->req.recvb;
addr->rec_length = (u16) ((req->req.misc >> 16) & 0xFFFF);
spin_lock_irqsave(&host_info_lock, flags);
hi = find_host_info(fi->host);
same_host = 0;
another_host = 0;
/* same host with address-entry containing same addressrange ? */
list_for_each_entry(fi_hlp, &hi->file_info_list, list) {
entry = fi_hlp->addr_list.next;
while (entry != &(fi_hlp->addr_list)) {
arm_addr =
list_entry(entry, struct arm_addr, addr_list);
if ((arm_addr->start == addr->start)
&& (arm_addr->end == addr->end)) {
DBGMSG("same host ownes same "
"addressrange -> EALREADY");
same_host = 1;
break;
}
entry = entry->next;
}
if (same_host) {
break;
}
}
if (same_host) {
/* addressrange occupied by same host */
vfree(addr->addr_space_buffer);
kfree(addr);
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EALREADY);
}
/* another host with valid address-entry containing same addressrange */
list_for_each_entry(hi, &host_info_list, list) {
if (hi->host != fi->host) {
list_for_each_entry(fi_hlp, &hi->file_info_list, list) {
entry = fi_hlp->addr_list.next;
while (entry != &(fi_hlp->addr_list)) {
arm_addr =
list_entry(entry, struct arm_addr,
addr_list);
if ((arm_addr->start == addr->start)
&& (arm_addr->end == addr->end)) {
DBGMSG
("another host ownes same "
"addressrange");
another_host = 1;
break;
}
entry = entry->next;
}
if (another_host) {
break;
}
}
}
}
if (another_host) {
DBGMSG("another hosts entry is valid -> SUCCESS");
if (copy_to_user(int2ptr(req->req.recvb),
&addr->start, sizeof(u64))) {
printk(KERN_ERR "raw1394: arm_register failed "
" address-range-entry is invalid -> EFAULT !!!\n");
vfree(addr->addr_space_buffer);
kfree(addr);
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EFAULT);
}
free_pending_request(req); /* immediate success or fail */
/* INSERT ENTRY */
list_add_tail(&addr->addr_list, &fi->addr_list);
spin_unlock_irqrestore(&host_info_lock, flags);
return sizeof(struct raw1394_request);
}
retval =
hpsb_register_addrspace(&raw1394_highlevel, fi->host, &arm_ops,
req->req.address,
req->req.address + req->req.length);
if (retval) {
/* INSERT ENTRY */
list_add_tail(&addr->addr_list, &fi->addr_list);
} else {
DBGMSG("arm_register failed errno: %d \n", retval);
vfree(addr->addr_space_buffer);
kfree(addr);
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EALREADY);
}
spin_unlock_irqrestore(&host_info_lock, flags);
free_pending_request(req); /* immediate success or fail */
return sizeof(struct raw1394_request);
}
static int arm_unregister(struct file_info *fi, struct pending_request *req)
{
int found = 0;
int retval = 0;
struct list_head *entry;
struct arm_addr *addr = NULL;
struct host_info *hi;
struct file_info *fi_hlp = NULL;
struct arm_addr *arm_addr = NULL;
int another_host;
unsigned long flags;
DBGMSG("arm_Unregister called addr(Offset): "
"%8.8x %8.8x",
(u32) ((req->req.address >> 32) & 0xFFFF),
(u32) (req->req.address & 0xFFFFFFFF));
spin_lock_irqsave(&host_info_lock, flags);
/* get addr */
entry = fi->addr_list.next;
while (entry != &(fi->addr_list)) {
addr = list_entry(entry, struct arm_addr, addr_list);
if (addr->start == req->req.address) {
found = 1;
break;
}
entry = entry->next;
}
if (!found) {
DBGMSG("arm_Unregister addr not found");
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EINVAL);
}
DBGMSG("arm_Unregister addr found");
another_host = 0;
/* another host with valid address-entry containing
same addressrange */
list_for_each_entry(hi, &host_info_list, list) {
if (hi->host != fi->host) {
list_for_each_entry(fi_hlp, &hi->file_info_list, list) {
entry = fi_hlp->addr_list.next;
while (entry != &(fi_hlp->addr_list)) {
arm_addr = list_entry(entry,
struct arm_addr,
addr_list);
if (arm_addr->start == addr->start) {
DBGMSG("another host ownes "
"same addressrange");
another_host = 1;
break;
}
entry = entry->next;
}
if (another_host) {
break;
}
}
}
}
if (another_host) {
DBGMSG("delete entry from list -> success");
list_del(&addr->addr_list);
vfree(addr->addr_space_buffer);
kfree(addr);
free_pending_request(req); /* immediate success or fail */
spin_unlock_irqrestore(&host_info_lock, flags);
return sizeof(struct raw1394_request);
}
retval =
hpsb_unregister_addrspace(&raw1394_highlevel, fi->host,
addr->start);
if (!retval) {
printk(KERN_ERR "raw1394: arm_Unregister failed -> EINVAL\n");
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EINVAL);
}
DBGMSG("delete entry from list -> success");
list_del(&addr->addr_list);
spin_unlock_irqrestore(&host_info_lock, flags);
vfree(addr->addr_space_buffer);
kfree(addr);
free_pending_request(req); /* immediate success or fail */
return sizeof(struct raw1394_request);
}
/* Copy data from ARM buffer(s) to user buffer. */
static int arm_get_buf(struct file_info *fi, struct pending_request *req)
{
struct arm_addr *arm_addr = NULL;
unsigned long flags;
unsigned long offset;
struct list_head *entry;
DBGMSG("arm_get_buf "
"addr(Offset): %04X %08X length: %u",
(u32) ((req->req.address >> 32) & 0xFFFF),
(u32) (req->req.address & 0xFFFFFFFF), (u32) req->req.length);
spin_lock_irqsave(&host_info_lock, flags);
entry = fi->addr_list.next;
while (entry != &(fi->addr_list)) {
arm_addr = list_entry(entry, struct arm_addr, addr_list);
if ((arm_addr->start <= req->req.address) &&
(arm_addr->end > req->req.address)) {
if (req->req.address + req->req.length <= arm_addr->end) {
offset = req->req.address - arm_addr->start;
DBGMSG
("arm_get_buf copy_to_user( %08X, %p, %u )",
(u32) req->req.recvb,
arm_addr->addr_space_buffer + offset,
(u32) req->req.length);
if (copy_to_user
(int2ptr(req->req.recvb),
arm_addr->addr_space_buffer + offset,
req->req.length)) {
spin_unlock_irqrestore(&host_info_lock,
flags);
return (-EFAULT);
}
spin_unlock_irqrestore(&host_info_lock, flags);
/* We have to free the request, because we
* queue no response, and therefore nobody
* will free it. */
free_pending_request(req);
return sizeof(struct raw1394_request);
} else {
DBGMSG("arm_get_buf request exceeded mapping");
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EINVAL);
}
}
entry = entry->next;
}
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EINVAL);
}
/* Copy data from user buffer to ARM buffer(s). */
static int arm_set_buf(struct file_info *fi, struct pending_request *req)
{
struct arm_addr *arm_addr = NULL;
unsigned long flags;
unsigned long offset;
struct list_head *entry;
DBGMSG("arm_set_buf "
"addr(Offset): %04X %08X length: %u",
(u32) ((req->req.address >> 32) & 0xFFFF),
(u32) (req->req.address & 0xFFFFFFFF), (u32) req->req.length);
spin_lock_irqsave(&host_info_lock, flags);
entry = fi->addr_list.next;
while (entry != &(fi->addr_list)) {
arm_addr = list_entry(entry, struct arm_addr, addr_list);
if ((arm_addr->start <= req->req.address) &&
(arm_addr->end > req->req.address)) {
if (req->req.address + req->req.length <= arm_addr->end) {
offset = req->req.address - arm_addr->start;
DBGMSG
("arm_set_buf copy_from_user( %p, %08X, %u )",
arm_addr->addr_space_buffer + offset,
(u32) req->req.sendb,
(u32) req->req.length);
if (copy_from_user
(arm_addr->addr_space_buffer + offset,
int2ptr(req->req.sendb),
req->req.length)) {
spin_unlock_irqrestore(&host_info_lock,
flags);
return (-EFAULT);
}
spin_unlock_irqrestore(&host_info_lock, flags);
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
return sizeof(struct raw1394_request);
} else {
DBGMSG("arm_set_buf request exceeded mapping");
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EINVAL);
}
}
entry = entry->next;
}
spin_unlock_irqrestore(&host_info_lock, flags);
return (-EINVAL);
}
static int reset_notification(struct file_info *fi, struct pending_request *req)
{
DBGMSG("reset_notification called - switch %s ",
(req->req.misc == RAW1394_NOTIFY_OFF) ? "OFF" : "ON");
if ((req->req.misc == RAW1394_NOTIFY_OFF) ||
(req->req.misc == RAW1394_NOTIFY_ON)) {
fi->notification = (u8) req->req.misc;
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
return sizeof(struct raw1394_request);
}
/* error EINVAL (22) invalid argument */
return (-EINVAL);
}
static int write_phypacket(struct file_info *fi, struct pending_request *req)
{
struct hpsb_packet *packet = NULL;
int retval = 0;
quadlet_t data;
unsigned long flags;
data = be32_to_cpu((u32) req->req.sendb);
DBGMSG("write_phypacket called - quadlet 0x%8.8x ", data);
packet = hpsb_make_phypacket(fi->host, data);
if (!packet)
return -ENOMEM;
req->req.length = 0;
req->packet = packet;
hpsb_set_packet_complete_task(packet,
(void (*)(void *))queue_complete_cb, req);
spin_lock_irqsave(&fi->reqlists_lock, flags);
list_add_tail(&req->list, &fi->req_pending);
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
packet->generation = req->req.generation;
retval = hpsb_send_packet(packet);
DBGMSG("write_phypacket send_packet called => retval: %d ", retval);
if (retval < 0) {
req->req.error = RAW1394_ERROR_SEND_ERROR;
req->req.length = 0;
queue_complete_req(req);
}
return sizeof(struct raw1394_request);
}
static int get_config_rom(struct file_info *fi, struct pending_request *req)
{
int ret = sizeof(struct raw1394_request);
quadlet_t *data = kmalloc(req->req.length, SLAB_KERNEL);
int status;
if (!data)
return -ENOMEM;
status =
csr1212_read(fi->host->csr.rom, CSR1212_CONFIG_ROM_SPACE_OFFSET,
data, req->req.length);
if (copy_to_user(int2ptr(req->req.recvb), data, req->req.length))
ret = -EFAULT;
if (copy_to_user
(int2ptr(req->req.tag), &fi->host->csr.rom->cache_head->len,
sizeof(fi->host->csr.rom->cache_head->len)))
ret = -EFAULT;
if (copy_to_user(int2ptr(req->req.address), &fi->host->csr.generation,
sizeof(fi->host->csr.generation)))
ret = -EFAULT;
if (copy_to_user(int2ptr(req->req.sendb), &status, sizeof(status)))
ret = -EFAULT;
kfree(data);
if (ret >= 0) {
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
}
return ret;
}
static int update_config_rom(struct file_info *fi, struct pending_request *req)
{
int ret = sizeof(struct raw1394_request);
quadlet_t *data = kmalloc(req->req.length, SLAB_KERNEL);
if (!data)
return -ENOMEM;
if (copy_from_user(data, int2ptr(req->req.sendb), req->req.length)) {
ret = -EFAULT;
} else {
int status = hpsb_update_config_rom(fi->host,
data, req->req.length,
(unsigned char)req->req.
misc);
if (copy_to_user
(int2ptr(req->req.recvb), &status, sizeof(status)))
ret = -ENOMEM;
}
kfree(data);
if (ret >= 0) {
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
fi->cfgrom_upd = 1;
}
return ret;
}
static int modify_config_rom(struct file_info *fi, struct pending_request *req)
{
struct csr1212_keyval *kv;
struct csr1212_csr_rom_cache *cache;
struct csr1212_dentry *dentry;
u32 dr;
int ret = 0;
if (req->req.misc == ~0) {
if (req->req.length == 0)
return -EINVAL;
/* Find an unused slot */
for (dr = 0;
dr < RAW1394_MAX_USER_CSR_DIRS && fi->csr1212_dirs[dr];
dr++) ;
if (dr == RAW1394_MAX_USER_CSR_DIRS)
return -ENOMEM;
fi->csr1212_dirs[dr] =
csr1212_new_directory(CSR1212_KV_ID_VENDOR);
if (!fi->csr1212_dirs[dr])
return -ENOMEM;
} else {
dr = req->req.misc;
if (!fi->csr1212_dirs[dr])
return -EINVAL;
/* Delete old stuff */
for (dentry =
fi->csr1212_dirs[dr]->value.directory.dentries_head;
dentry; dentry = dentry->next) {
csr1212_detach_keyval_from_directory(fi->host->csr.rom->
root_kv,
dentry->kv);
}
if (req->req.length == 0) {
csr1212_release_keyval(fi->csr1212_dirs[dr]);
fi->csr1212_dirs[dr] = NULL;
hpsb_update_config_rom_image(fi->host);
free_pending_request(req);
return sizeof(struct raw1394_request);
}
}
cache = csr1212_rom_cache_malloc(0, req->req.length);
if (!cache) {
csr1212_release_keyval(fi->csr1212_dirs[dr]);
fi->csr1212_dirs[dr] = NULL;
return -ENOMEM;
}
cache->filled_head = kmalloc(sizeof(*cache->filled_head), GFP_KERNEL);
if (!cache->filled_head) {
csr1212_release_keyval(fi->csr1212_dirs[dr]);
fi->csr1212_dirs[dr] = NULL;
CSR1212_FREE(cache);
return -ENOMEM;
}
cache->filled_tail = cache->filled_head;
if (copy_from_user(cache->data, int2ptr(req->req.sendb),
req->req.length)) {
csr1212_release_keyval(fi->csr1212_dirs[dr]);
fi->csr1212_dirs[dr] = NULL;
ret = -EFAULT;
} else {
cache->len = req->req.length;
cache->filled_head->offset_start = 0;
cache->filled_head->offset_end = cache->size - 1;
cache->layout_head = cache->layout_tail = fi->csr1212_dirs[dr];
ret = CSR1212_SUCCESS;
/* parse all the items */
for (kv = cache->layout_head; ret == CSR1212_SUCCESS && kv;
kv = kv->next) {
ret = csr1212_parse_keyval(kv, cache);
}
/* attach top level items to the root directory */
for (dentry =
fi->csr1212_dirs[dr]->value.directory.dentries_head;
ret == CSR1212_SUCCESS && dentry; dentry = dentry->next) {
ret =
csr1212_attach_keyval_to_directory(fi->host->csr.
rom->root_kv,
dentry->kv);
}
if (ret == CSR1212_SUCCESS) {
ret = hpsb_update_config_rom_image(fi->host);
if (ret >= 0 && copy_to_user(int2ptr(req->req.recvb),
&dr, sizeof(dr))) {
ret = -ENOMEM;
}
}
}
kfree(cache->filled_head);
CSR1212_FREE(cache);
if (ret >= 0) {
/* we have to free the request, because we queue no response,
* and therefore nobody will free it */
free_pending_request(req);
return sizeof(struct raw1394_request);
} else {
for (dentry =
fi->csr1212_dirs[dr]->value.directory.dentries_head;
dentry; dentry = dentry->next) {
csr1212_detach_keyval_from_directory(fi->host->csr.rom->
root_kv,
dentry->kv);
}
csr1212_release_keyval(fi->csr1212_dirs[dr]);
fi->csr1212_dirs[dr] = NULL;
return ret;
}
}
static int state_connected(struct file_info *fi, struct pending_request *req)
{
int node = req->req.address >> 48;
req->req.error = RAW1394_ERROR_NONE;
switch (req->req.type) {
case RAW1394_REQ_ECHO:
queue_complete_req(req);
return sizeof(struct raw1394_request);
case RAW1394_REQ_ISO_SEND:
return handle_iso_send(fi, req, node);
case RAW1394_REQ_ARM_REGISTER:
return arm_register(fi, req);
case RAW1394_REQ_ARM_UNREGISTER:
return arm_unregister(fi, req);
case RAW1394_REQ_ARM_SET_BUF:
return arm_set_buf(fi, req);
case RAW1394_REQ_ARM_GET_BUF:
return arm_get_buf(fi, req);
case RAW1394_REQ_RESET_NOTIFY:
return reset_notification(fi, req);
case RAW1394_REQ_ISO_LISTEN:
handle_iso_listen(fi, req);
return sizeof(struct raw1394_request);
case RAW1394_REQ_FCP_LISTEN:
handle_fcp_listen(fi, req);
return sizeof(struct raw1394_request);
case RAW1394_REQ_RESET_BUS:
if (req->req.misc == RAW1394_LONG_RESET) {
DBGMSG("busreset called (type: LONG)");
hpsb_reset_bus(fi->host, LONG_RESET);
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
return sizeof(struct raw1394_request);
}
if (req->req.misc == RAW1394_SHORT_RESET) {
DBGMSG("busreset called (type: SHORT)");
hpsb_reset_bus(fi->host, SHORT_RESET);
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
return sizeof(struct raw1394_request);
}
/* error EINVAL (22) invalid argument */
return (-EINVAL);
case RAW1394_REQ_GET_ROM:
return get_config_rom(fi, req);
case RAW1394_REQ_UPDATE_ROM:
return update_config_rom(fi, req);
case RAW1394_REQ_MODIFY_ROM:
return modify_config_rom(fi, req);
}
if (req->req.generation != get_hpsb_generation(fi->host)) {
req->req.error = RAW1394_ERROR_GENERATION;
req->req.generation = get_hpsb_generation(fi->host);
req->req.length = 0;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
switch (req->req.type) {
case RAW1394_REQ_PHYPACKET:
return write_phypacket(fi, req);
case RAW1394_REQ_ASYNC_SEND:
return handle_async_send(fi, req);
}
if (req->req.length == 0) {
req->req.error = RAW1394_ERROR_INVALID_ARG;
queue_complete_req(req);
return sizeof(struct raw1394_request);
}
return handle_async_request(fi, req, node);
}
static ssize_t raw1394_write(struct file *file, const char __user * buffer,
size_t count, loff_t * offset_is_ignored)
{
struct file_info *fi = (struct file_info *)file->private_data;
struct pending_request *req;
ssize_t retval = 0;
#ifdef CONFIG_COMPAT
if (count == sizeof(struct compat_raw1394_req) &&
sizeof(struct compat_raw1394_req) !=
sizeof(struct raw1394_request)) {
buffer = raw1394_compat_write(buffer);
if (IS_ERR(buffer))
return PTR_ERR(buffer);
} else
#endif
if (count != sizeof(struct raw1394_request)) {
return -EINVAL;
}
req = alloc_pending_request();
if (req == NULL) {
return -ENOMEM;
}
req->file_info = fi;
if (copy_from_user(&req->req, buffer, sizeof(struct raw1394_request))) {
free_pending_request(req);
return -EFAULT;
}
switch (fi->state) {
case opened:
retval = state_opened(fi, req);
break;
case initialized:
retval = state_initialized(fi, req);
break;
case connected:
retval = state_connected(fi, req);
break;
}
if (retval < 0) {
free_pending_request(req);
}
return retval;
}
/* rawiso operations */
/* check if any RAW1394_REQ_RAWISO_ACTIVITY event is already in the
* completion queue (reqlists_lock must be taken) */
static inline int __rawiso_event_in_queue(struct file_info *fi)
{
struct pending_request *req;
list_for_each_entry(req, &fi->req_complete, list)
if (req->req.type == RAW1394_REQ_RAWISO_ACTIVITY)
return 1;
return 0;
}
/* put a RAWISO_ACTIVITY event in the queue, if one isn't there already */
static void queue_rawiso_event(struct file_info *fi)
{
unsigned long flags;
spin_lock_irqsave(&fi->reqlists_lock, flags);
/* only one ISO activity event may be in the queue */
if (!__rawiso_event_in_queue(fi)) {
struct pending_request *req =
__alloc_pending_request(SLAB_ATOMIC);
if (req) {
req->file_info = fi;
req->req.type = RAW1394_REQ_RAWISO_ACTIVITY;
req->req.generation = get_hpsb_generation(fi->host);
__queue_complete_req(req);
} else {
/* on allocation failure, signal an overflow */
if (fi->iso_handle) {
atomic_inc(&fi->iso_handle->overflows);
}
}
}
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
}
static void rawiso_activity_cb(struct hpsb_iso *iso)
{
unsigned long flags;
struct host_info *hi;
struct file_info *fi;
spin_lock_irqsave(&host_info_lock, flags);
hi = find_host_info(iso->host);
if (hi != NULL) {
list_for_each_entry(fi, &hi->file_info_list, list) {
if (fi->iso_handle == iso)
queue_rawiso_event(fi);
}
}
spin_unlock_irqrestore(&host_info_lock, flags);
}
/* helper function - gather all the kernel iso status bits for returning to user-space */
static void raw1394_iso_fill_status(struct hpsb_iso *iso,
struct raw1394_iso_status *stat)
{
stat->config.data_buf_size = iso->buf_size;
stat->config.buf_packets = iso->buf_packets;
stat->config.channel = iso->channel;
stat->config.speed = iso->speed;
stat->config.irq_interval = iso->irq_interval;
stat->n_packets = hpsb_iso_n_ready(iso);
stat->overflows = atomic_read(&iso->overflows);
stat->xmit_cycle = iso->xmit_cycle;
}
static int raw1394_iso_xmit_init(struct file_info *fi, void __user * uaddr)
{
struct raw1394_iso_status stat;
if (!fi->host)
return -EINVAL;
if (copy_from_user(&stat, uaddr, sizeof(stat)))
return -EFAULT;
fi->iso_handle = hpsb_iso_xmit_init(fi->host,
stat.config.data_buf_size,
stat.config.buf_packets,
stat.config.channel,
stat.config.speed,
stat.config.irq_interval,
rawiso_activity_cb);
if (!fi->iso_handle)
return -ENOMEM;
fi->iso_state = RAW1394_ISO_XMIT;
raw1394_iso_fill_status(fi->iso_handle, &stat);
if (copy_to_user(uaddr, &stat, sizeof(stat)))
return -EFAULT;
/* queue an event to get things started */
rawiso_activity_cb(fi->iso_handle);
return 0;
}
static int raw1394_iso_recv_init(struct file_info *fi, void __user * uaddr)
{
struct raw1394_iso_status stat;
if (!fi->host)
return -EINVAL;
if (copy_from_user(&stat, uaddr, sizeof(stat)))
return -EFAULT;
fi->iso_handle = hpsb_iso_recv_init(fi->host,
stat.config.data_buf_size,
stat.config.buf_packets,
stat.config.channel,
stat.config.dma_mode,
stat.config.irq_interval,
rawiso_activity_cb);
if (!fi->iso_handle)
return -ENOMEM;
fi->iso_state = RAW1394_ISO_RECV;
raw1394_iso_fill_status(fi->iso_handle, &stat);
if (copy_to_user(uaddr, &stat, sizeof(stat)))
return -EFAULT;
return 0;
}
static int raw1394_iso_get_status(struct file_info *fi, void __user * uaddr)
{
struct raw1394_iso_status stat;
struct hpsb_iso *iso = fi->iso_handle;
raw1394_iso_fill_status(fi->iso_handle, &stat);
if (copy_to_user(uaddr, &stat, sizeof(stat)))
return -EFAULT;
/* reset overflow counter */
atomic_set(&iso->overflows, 0);
return 0;
}
/* copy N packet_infos out of the ringbuffer into user-supplied array */
static int raw1394_iso_recv_packets(struct file_info *fi, void __user * uaddr)
{
struct raw1394_iso_packets upackets;
unsigned int packet = fi->iso_handle->first_packet;
int i;
if (copy_from_user(&upackets, uaddr, sizeof(upackets)))
return -EFAULT;
if (upackets.n_packets > hpsb_iso_n_ready(fi->iso_handle))
return -EINVAL;
/* ensure user-supplied buffer is accessible and big enough */
if (!access_ok(VERIFY_WRITE, upackets.infos,
upackets.n_packets *
sizeof(struct raw1394_iso_packet_info)))
return -EFAULT;
/* copy the packet_infos out */
for (i = 0; i < upackets.n_packets; i++) {
if (__copy_to_user(&upackets.infos[i],
&fi->iso_handle->infos[packet],
sizeof(struct raw1394_iso_packet_info)))
return -EFAULT;
packet = (packet + 1) % fi->iso_handle->buf_packets;
}
return 0;
}
/* copy N packet_infos from user to ringbuffer, and queue them for transmission */
static int raw1394_iso_send_packets(struct file_info *fi, void __user * uaddr)
{
struct raw1394_iso_packets upackets;
int i, rv;
if (copy_from_user(&upackets, uaddr, sizeof(upackets)))
return -EFAULT;
if (upackets.n_packets >= fi->iso_handle->buf_packets)
return -EINVAL;
if (upackets.n_packets >= hpsb_iso_n_ready(fi->iso_handle))
return -EAGAIN;
/* ensure user-supplied buffer is accessible and big enough */
if (!access_ok(VERIFY_READ, upackets.infos,
upackets.n_packets *
sizeof(struct raw1394_iso_packet_info)))
return -EFAULT;
/* copy the infos structs in and queue the packets */
for (i = 0; i < upackets.n_packets; i++) {
struct raw1394_iso_packet_info info;
if (__copy_from_user(&info, &upackets.infos[i],
sizeof(struct raw1394_iso_packet_info)))
return -EFAULT;
rv = hpsb_iso_xmit_queue_packet(fi->iso_handle, info.offset,
info.len, info.tag, info.sy);
if (rv)
return rv;
}
return 0;
}
static void raw1394_iso_shutdown(struct file_info *fi)
{
if (fi->iso_handle)
hpsb_iso_shutdown(fi->iso_handle);
fi->iso_handle = NULL;
fi->iso_state = RAW1394_ISO_INACTIVE;
}
/* mmap the rawiso xmit/recv buffer */
static int raw1394_mmap(struct file *file, struct vm_area_struct *vma)
{
struct file_info *fi = file->private_data;
if (fi->iso_state == RAW1394_ISO_INACTIVE)
return -EINVAL;
return dma_region_mmap(&fi->iso_handle->data_buf, file, vma);
}
/* ioctl is only used for rawiso operations */
static int raw1394_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct file_info *fi = file->private_data;
void __user *argp = (void __user *)arg;
switch (fi->iso_state) {
case RAW1394_ISO_INACTIVE:
switch (cmd) {
case RAW1394_IOC_ISO_XMIT_INIT:
return raw1394_iso_xmit_init(fi, argp);
case RAW1394_IOC_ISO_RECV_INIT:
return raw1394_iso_recv_init(fi, argp);
default:
break;
}
break;
case RAW1394_ISO_RECV:
switch (cmd) {
case RAW1394_IOC_ISO_RECV_START:{
/* copy args from user-space */
int args[3];
if (copy_from_user
(&args[0], argp, sizeof(args)))
return -EFAULT;
return hpsb_iso_recv_start(fi->iso_handle,
args[0], args[1],
args[2]);
}
case RAW1394_IOC_ISO_XMIT_RECV_STOP:
hpsb_iso_stop(fi->iso_handle);
return 0;
case RAW1394_IOC_ISO_RECV_LISTEN_CHANNEL:
return hpsb_iso_recv_listen_channel(fi->iso_handle,
arg);
case RAW1394_IOC_ISO_RECV_UNLISTEN_CHANNEL:
return hpsb_iso_recv_unlisten_channel(fi->iso_handle,
arg);
case RAW1394_IOC_ISO_RECV_SET_CHANNEL_MASK:{
/* copy the u64 from user-space */
u64 mask;
if (copy_from_user(&mask, argp, sizeof(mask)))
return -EFAULT;
return hpsb_iso_recv_set_channel_mask(fi->
iso_handle,
mask);
}
case RAW1394_IOC_ISO_GET_STATUS:
return raw1394_iso_get_status(fi, argp);
case RAW1394_IOC_ISO_RECV_PACKETS:
return raw1394_iso_recv_packets(fi, argp);
case RAW1394_IOC_ISO_RECV_RELEASE_PACKETS:
return hpsb_iso_recv_release_packets(fi->iso_handle,
arg);
case RAW1394_IOC_ISO_RECV_FLUSH:
return hpsb_iso_recv_flush(fi->iso_handle);
case RAW1394_IOC_ISO_SHUTDOWN:
raw1394_iso_shutdown(fi);
return 0;
case RAW1394_IOC_ISO_QUEUE_ACTIVITY:
queue_rawiso_event(fi);
return 0;
}
break;
case RAW1394_ISO_XMIT:
switch (cmd) {
case RAW1394_IOC_ISO_XMIT_START:{
/* copy two ints from user-space */
int args[2];
if (copy_from_user
(&args[0], argp, sizeof(args)))
return -EFAULT;
return hpsb_iso_xmit_start(fi->iso_handle,
args[0], args[1]);
}
case RAW1394_IOC_ISO_XMIT_SYNC:
return hpsb_iso_xmit_sync(fi->iso_handle);
case RAW1394_IOC_ISO_XMIT_RECV_STOP:
hpsb_iso_stop(fi->iso_handle);
return 0;
case RAW1394_IOC_ISO_GET_STATUS:
return raw1394_iso_get_status(fi, argp);
case RAW1394_IOC_ISO_XMIT_PACKETS:
return raw1394_iso_send_packets(fi, argp);
case RAW1394_IOC_ISO_SHUTDOWN:
raw1394_iso_shutdown(fi);
return 0;
case RAW1394_IOC_ISO_QUEUE_ACTIVITY:
queue_rawiso_event(fi);
return 0;
}
break;
default:
break;
}
return -EINVAL;
}
static unsigned int raw1394_poll(struct file *file, poll_table * pt)
{
struct file_info *fi = file->private_data;
unsigned int mask = POLLOUT | POLLWRNORM;
unsigned long flags;
poll_wait(file, &fi->wait_complete, pt);
spin_lock_irqsave(&fi->reqlists_lock, flags);
if (!list_empty(&fi->req_complete)) {
mask |= POLLIN | POLLRDNORM;
}
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
return mask;
}
static int raw1394_open(struct inode *inode, struct file *file)
{
struct file_info *fi;
fi = kzalloc(sizeof(*fi), SLAB_KERNEL);
if (!fi)
return -ENOMEM;
fi->notification = (u8) RAW1394_NOTIFY_ON; /* busreset notification */
INIT_LIST_HEAD(&fi->list);
fi->state = opened;
INIT_LIST_HEAD(&fi->req_pending);
INIT_LIST_HEAD(&fi->req_complete);
spin_lock_init(&fi->reqlists_lock);
init_waitqueue_head(&fi->wait_complete);
INIT_LIST_HEAD(&fi->addr_list);
file->private_data = fi;
return 0;
}
static int raw1394_release(struct inode *inode, struct file *file)
{
struct file_info *fi = file->private_data;
struct list_head *lh;
struct pending_request *req;
int i, fail;
int retval = 0;
struct list_head *entry;
struct arm_addr *addr = NULL;
struct host_info *hi;
struct file_info *fi_hlp = NULL;
struct arm_addr *arm_addr = NULL;
int another_host;
int csr_mod = 0;
unsigned long flags;
if (fi->iso_state != RAW1394_ISO_INACTIVE)
raw1394_iso_shutdown(fi);
for (i = 0; i < 64; i++) {
if (fi->listen_channels & (1ULL << i)) {
hpsb_unlisten_channel(&raw1394_highlevel, fi->host, i);
}
}
spin_lock_irqsave(&host_info_lock, flags);
fi->listen_channels = 0;
fail = 0;
/* set address-entries invalid */
while (!list_empty(&fi->addr_list)) {
another_host = 0;
lh = fi->addr_list.next;
addr = list_entry(lh, struct arm_addr, addr_list);
/* another host with valid address-entry containing
same addressrange? */
list_for_each_entry(hi, &host_info_list, list) {
if (hi->host != fi->host) {
list_for_each_entry(fi_hlp, &hi->file_info_list,
list) {
entry = fi_hlp->addr_list.next;
while (entry != &(fi_hlp->addr_list)) {
arm_addr = list_entry(entry, struct
arm_addr,
addr_list);
if (arm_addr->start ==
addr->start) {
DBGMSG
("raw1394_release: "
"another host ownes "
"same addressrange");
another_host = 1;
break;
}
entry = entry->next;
}
if (another_host) {
break;
}
}
}
}
if (!another_host) {
DBGMSG("raw1394_release: call hpsb_arm_unregister");
retval =
hpsb_unregister_addrspace(&raw1394_highlevel,
fi->host, addr->start);
if (!retval) {
++fail;
printk(KERN_ERR
"raw1394_release arm_Unregister failed\n");
}
}
DBGMSG("raw1394_release: delete addr_entry from list");
list_del(&addr->addr_list);
vfree(addr->addr_space_buffer);
kfree(addr);
} /* while */
spin_unlock_irqrestore(&host_info_lock, flags);
if (fail > 0) {
printk(KERN_ERR "raw1394: during addr_list-release "
"error(s) occurred \n");
}
for (;;) {
/* This locked section guarantees that neither
* complete nor pending requests exist once i!=0 */
spin_lock_irqsave(&fi->reqlists_lock, flags);
while ((req = __next_complete_req(fi)))
free_pending_request(req);
i = list_empty(&fi->req_pending);
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
if (i)
break;
/*
* Sleep until more requests can be freed.
*
* NB: We call the macro wait_event() with a condition argument
* with side effect. This is only possible because the side
* effect does not occur until the condition became true, and
* wait_event() won't evaluate the condition again after that.
*/
wait_event(fi->wait_complete, (req = next_complete_req(fi)));
free_pending_request(req);
}
/* Remove any sub-trees left by user space programs */
for (i = 0; i < RAW1394_MAX_USER_CSR_DIRS; i++) {
struct csr1212_dentry *dentry;
if (!fi->csr1212_dirs[i])
continue;
for (dentry =
fi->csr1212_dirs[i]->value.directory.dentries_head; dentry;
dentry = dentry->next) {
csr1212_detach_keyval_from_directory(fi->host->csr.rom->
root_kv,
dentry->kv);
}
csr1212_release_keyval(fi->csr1212_dirs[i]);
fi->csr1212_dirs[i] = NULL;
csr_mod = 1;
}
if ((csr_mod || fi->cfgrom_upd)
&& hpsb_update_config_rom_image(fi->host) < 0)
HPSB_ERR
("Failed to generate Configuration ROM image for host %d",
fi->host->id);
if (fi->state == connected) {
spin_lock_irqsave(&host_info_lock, flags);
list_del(&fi->list);
spin_unlock_irqrestore(&host_info_lock, flags);
put_device(&fi->host->device);
}
kfree(fi);
return 0;
}
/*** HOTPLUG STUFF **********************************************************/
/*
* Export information about protocols/devices supported by this driver.
*/
static struct ieee1394_device_id raw1394_id_table[] = {
{
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
.specifier_id = AVC_UNIT_SPEC_ID_ENTRY & 0xffffff,
.version = AVC_SW_VERSION_ENTRY & 0xffffff},
{
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
.version = CAMERA_SW_VERSION_ENTRY & 0xffffff},
{
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
.version = (CAMERA_SW_VERSION_ENTRY + 1) & 0xffffff},
{
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
.version = (CAMERA_SW_VERSION_ENTRY + 2) & 0xffffff},
{}
};
MODULE_DEVICE_TABLE(ieee1394, raw1394_id_table);
static struct hpsb_protocol_driver raw1394_driver = {
.name = "raw1394 Driver",
.id_table = raw1394_id_table,
.driver = {
.name = "raw1394",
.bus = &ieee1394_bus_type,
},
};
/******************************************************************************/
static struct hpsb_highlevel raw1394_highlevel = {
.name = RAW1394_DEVICE_NAME,
.add_host = add_host,
.remove_host = remove_host,
.host_reset = host_reset,
.iso_receive = iso_receive,
.fcp_request = fcp_request,
};
static struct cdev raw1394_cdev;
static struct file_operations raw1394_fops = {
.owner = THIS_MODULE,
.read = raw1394_read,
.write = raw1394_write,
.mmap = raw1394_mmap,
.ioctl = raw1394_ioctl,
// .compat_ioctl = ... someone needs to do this
.poll = raw1394_poll,
.open = raw1394_open,
.release = raw1394_release,
};
static int __init init_raw1394(void)
{
int ret = 0;
hpsb_register_highlevel(&raw1394_highlevel);
if (IS_ERR
(class_device_create
(hpsb_protocol_class, NULL,
MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16), NULL,
RAW1394_DEVICE_NAME))) {
ret = -EFAULT;
goto out_unreg;
}
cdev_init(&raw1394_cdev, &raw1394_fops);
raw1394_cdev.owner = THIS_MODULE;
kobject_set_name(&raw1394_cdev.kobj, RAW1394_DEVICE_NAME);
ret = cdev_add(&raw1394_cdev, IEEE1394_RAW1394_DEV, 1);
if (ret) {
HPSB_ERR("raw1394 failed to register minor device block");
goto out_dev;
}
HPSB_INFO("raw1394: /dev/%s device initialized", RAW1394_DEVICE_NAME);
ret = hpsb_register_protocol(&raw1394_driver);
if (ret) {
HPSB_ERR("raw1394: failed to register protocol");
cdev_del(&raw1394_cdev);
goto out_dev;
}
goto out;
out_dev:
class_device_destroy(hpsb_protocol_class,
MKDEV(IEEE1394_MAJOR,
IEEE1394_MINOR_BLOCK_RAW1394 * 16));
out_unreg:
hpsb_unregister_highlevel(&raw1394_highlevel);
out:
return ret;
}
static void __exit cleanup_raw1394(void)
{
class_device_destroy(hpsb_protocol_class,
MKDEV(IEEE1394_MAJOR,
IEEE1394_MINOR_BLOCK_RAW1394 * 16));
cdev_del(&raw1394_cdev);
hpsb_unregister_highlevel(&raw1394_highlevel);
hpsb_unregister_protocol(&raw1394_driver);
}
module_init(init_raw1394);
module_exit(cleanup_raw1394);
MODULE_LICENSE("GPL");
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