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Copy pathctn91xx_event.c
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351 lines (283 loc) · 8.71 KB
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#include "ctn91xx.h"
#include "ctn91xx_event.h"
#include "ctn91xx_util.h"
#include "ctn91xx_driver.h"
#include "ctn91xx_rpc.h"
void ctn91xx_event_cleanup_waiting(ctn91xx_dev_t* dev)
{
struct list_head* i = NULL;
ctn91xx_event_t* event = NULL;
int not_done = 1;
int spin_count = 0;
spin_lock_w_flags(&dev->event_queue_lock);
if(list_empty(&dev->event_queue)) {
not_done = 0;
}
while(not_done) {
list_for_each(i, &dev->event_queue) {
event = list_entry(i, ctn91xx_event_t, list);
if(event->list.next == &dev->event_queue) {
not_done = 0;
}
//cleanup
list_del(&event->list);
ctn91xx_event_cleanup(dev, event);
break;
}
spin_count++;
if( spin_count > 100 ) {
WARNING("event cleanup took too long, breaking out");
break;
}
}
spin_unlock_w_flags(&dev->event_queue_lock);
}
void ctn91xx_event_reset(ctn91xx_dev_t* dev)
{
ctn91xx_event_cleanup_waiting(dev);
}
int ctn91xx_event_ready(ctn91xx_dev_t* dev)
{
int ret = 0;
spin_lock_w_flags(&dev->event_queue_lock);
if(!list_empty(&dev->event_queue)) {
ret = 1;
}
spin_unlock_w_flags(&dev->event_queue_lock);
return ret;
}
ctn91xx_event_t* ctn91xx_remove_first_event(ctn91xx_dev_t* dev)
{
ctn91xx_event_t* event = NULL;
spin_lock_w_flags(&dev->event_queue_lock);
if(!list_empty(&dev->event_queue)) {
event = list_entry(dev->event_queue.next, ctn91xx_event_t, list);
list_del(&event->list);
}
spin_unlock_w_flags(&dev->event_queue_lock);
return event;
}
ctn91xx_event_t* ctn91xx_remove_first_delayed_event(ctn91xx_dev_t* dev)
{
ctn91xx_event_t* event = NULL;
spin_lock_w_flags(&dev->delayed_event_queue_lock);
if(!list_empty(&dev->delayed_event_queue)) {
event = list_entry(dev->delayed_event_queue.next, ctn91xx_event_t, list);
list_del(&event->list);
}
spin_unlock_w_flags(&dev->delayed_event_queue_lock);
return event;
}
void ctn91xx_event_cleanup(ctn91xx_dev_t* dev, ctn91xx_event_t* event)
{
if(event) {
kfree(event);
}
}
unsigned int ctn91xx_event_poll(struct file* filp, struct poll_table_struct* wait)
{
ctn91xx_dev_t* dev = NULL;
unsigned int mask = 0;
dev = ctn91xx_lookup_dev_from_file(NULL, filp);
if(ctn91xx_event_ready(dev) && dev->event_user_cnt) {
mask = POLLIN | POLLRDNORM;
}
poll_wait(filp, &dev->event_waitqueue, wait);
return mask;
}
ssize_t ctn91xx_event_read_common(ctn91xx_dev_t* dev, char __user * data, size_t count, int nonblock)
{
DECLARE_WAITQUEUE(wait, current);
ssize_t retval = 0;
ctn91xx_event_t* event = NULL;
add_wait_queue(&dev->event_waitqueue, &wait);
do {
int should_break = 0;
restart_wait:
should_break = 0;
__set_current_state(TASK_INTERRUPTIBLE);
should_break = ctn91xx_event_ready(dev);
if(should_break)
break;
if(!dev->event_user_cnt) {
retval = -EAGAIN;
goto cleanup;
}
if(nonblock) {
retval = -EAGAIN;
goto cleanup;
}
if(signal_pending(current)) {
retval = -ERESTARTSYS;
INFO("event read interrupted");
goto cleanup;
}
schedule();
} while(1);
if(count < SIZEOF_EVENT_HEADER) {
ERROR("event read buffer too small, needs to be %d",
SIZEOF_EVENT_HEADER);
retval = -EAGAIN;
goto cleanup;
}
event = ctn91xx_remove_first_event(dev);
if(!event) {
goto restart_wait;
}
if(copy_to_user((void __user*)data, &event->type, 1)) {
retval = -EIO;
goto cleanup;
}
if(copy_to_user((void __user*)data + 1, &event->length, 2)) {
retval = -EIO;
goto cleanup;
}
if(copy_to_user((void __user*)data + 3, &event->origin, 1)) {
retval = -EIO;
goto cleanup;
}
if(copy_to_user((void __user*)data + 4, &event->control_byte, 1)) {
retval = -EIO;
goto cleanup;
}
if(copy_to_user((void __user*)data + 5, &event->seqno, 1)) {
retval = -EIO;
goto cleanup;
}
retval = SIZEOF_EVENT_HEADER;
cleanup:
if(event) {
ctn91xx_event_cleanup(dev, event);
}
current->state = TASK_RUNNING;
remove_wait_queue(&dev->event_waitqueue, &wait);
return retval;
}
ssize_t ctn91xx_event_read(struct file* filp, char __user * data, size_t count, loff_t* offset)
{
ctn91xx_dev_t* dev = ctn91xx_lookup_dev_from_file( NULL, filp );
return ctn91xx_event_read_common( dev, data, count, filp->f_flags & O_NONBLOCK );
}
int ctn91xx_ioctl_event_read(ctn91xx_dev_t* dev, unsigned long arg, int compat)
{
if( compat ) {
event_read_compat_t read_data;
if( copy_from_user( &read_data, (event_read_compat_t*) arg, sizeof(event_read_compat_t) ) ) {
ERROR("input");
return -EIO;
}
return ctn91xx_event_read_common( dev, (char __user*)(unsigned long)read_data.data, read_data.count, 0 );
} else {
event_read_t read_data;
if( copy_from_user( &read_data, (event_read_t*) arg, sizeof(event_read_t) ) ) {
ERROR("input");
return -EIO;
}
return ctn91xx_event_read_common( dev, read_data.data, read_data.count, 0 );
}
}
ctn91xx_event_t* ctn91xx_event_new(ctn91xx_dev_t* dev, cablecard_interrupt_t* data)
{
return ctn91xx_event_new_full(dev, data->type, data->length, data->origin, data->control_byte, data->seqno);
}
ctn91xx_event_t* ctn91xx_event_new_full(
ctn91xx_dev_t* dev,
uint8_t type,
uint16_t length,
uint8_t origin,
uint8_t control_byte,
uint8_t seqno)
{
ctn91xx_event_t* event = NULL;
uint8_t should_queue = 1;
if(!dev->event_user_cnt) {
if( type == CTN91XX_EVENT_RPC_RECVD ) {
#if USE_LEON
should_queue = 1;
#else
return NULL;
#endif
} else {
return NULL;
}
}
event = kmalloc(sizeof(ctn91xx_event_t), GFP_ATOMIC);
if(!event) {
ERROR("kmalloc failed. event dropped");
return NULL;
}
memset(event, 0, sizeof(ctn91xx_event_t));
event->type = type;
event->length = length;
event->origin = origin;
event->control_byte = control_byte;
event->seqno = seqno;
event->should_queue = should_queue;
return event;
}
void ctn91xx_queue_event(ctn91xx_dev_t* dev, ctn91xx_event_t* event)
{
spin_lock_w_flags(&dev->event_queue_lock);
list_add_tail(&event->list,&dev->event_queue);
spin_unlock_w_flags(&dev->event_queue_lock);
wake_up_interruptible(&dev->event_waitqueue);
}
void ctn91xx_queue_delayed_event(ctn91xx_dev_t* dev, ctn91xx_event_t* event)
{
spin_lock_w_flags(&dev->delayed_event_queue_lock);
list_add_tail(&event->list,&dev->delayed_event_queue);
spin_unlock_w_flags(&dev->delayed_event_queue_lock);
schedule_work(&dev->delayed_event_worker);
}
void ctn91xx_handle_delayed_event( ctn91xx_dev_t* dev, ctn91xx_event_t* event )
{
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
void ctn91xx_delayed_event_worker(void* work)
#else
void ctn91xx_delayed_event_worker(struct work_struct* work)
#endif
{
ctn91xx_dev_t* dev = container_of(work, ctn91xx_dev_t, delayed_event_worker);
ctn91xx_event_t* event = ctn91xx_remove_first_delayed_event(dev);
ctn91xx_handle_delayed_event( dev, event );
if(event->should_queue) {
ctn91xx_queue_event(dev, event);
} else {
ctn91xx_event_cleanup(dev, event);
}
}
#define CONTROL_MSG_SLOT_NUMBER 0x8
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
void ctn91xx_delayed_slot_number_worker( void* work )
#else
void ctn91xx_delayed_slot_number_worker( struct work_struct* work )
#endif
{
rpc_send_t rpc;
ctn91xx_dev_t* dev = container_of(work, ctn91xx_dev_t, delayed_slot_number_worker);
INFO("sending slot number %d", dev->board_number);
rpc.msg = kmalloc( 8, GFP_ATOMIC );
rpc.length = 8;
rpc.section_length = 8;
rpc.payload_start = 1;
rpc.msg[0] = CONTROL_MSG_SLOT_NUMBER;
*((uint32_t*)&rpc.msg[4]) = htonl( (dev->face_present << 8) | dev->board_number );
ctn91xx_rpc_send_kernel( dev, &rpc );
kfree( rpc.msg );
}
void ctn91xx_event_dump_queue(ctn91xx_dev_t* dev)
{
struct list_head* i = NULL;
ctn91xx_event_t* event = NULL;
spin_lock_w_flags(&dev->event_queue_lock);
if(list_empty(&dev->event_queue)) {
goto end;
}
list_for_each(i, &dev->event_queue) {
event = list_entry(i, ctn91xx_event_t, list);
INFO("\tevent %p, type %#02x", event, event->type);
}
end:
spin_unlock_w_flags(&dev->event_queue_lock);
}