- /* Allocate output buffer memory for the opened device */
- fifo = objects_p[MINOR_NR]->fifo;
- fifo->buf_tx_entry=(struct canmsg_t *)kmalloc(MAX_BUF_LENGTH * sizeof(struct canmsg_t), GFP_KERNEL);
- if (fifo->buf_tx_entry == NULL)
- return -ENOMEM;
- else
- if ( add_mem_to_list(fifo->buf_tx_entry) )
- return -ENOMEM;
- /* Allocate input buffer memory for the opened device */
- fifo->buf_rx_entry=(struct canmsg_t *)kmalloc(MAX_BUF_LENGTH * sizeof(struct canmsg_t), GFP_KERNEL);
- if (fifo->buf_rx_entry == NULL)
- return -ENOMEM;
- else
- if ( add_mem_to_list(fifo->buf_rx_entry) )
- return -ENOMEM;
-
- /* In- and output buffer initialization */
- fifo->tx_readp = fifo->buf_tx_entry;
- fifo->tx_writep = fifo->buf_tx_entry;
- fifo->rx_readp = fifo->buf_rx_entry;
- fifo->rx_writep = fifo->buf_rx_entry;
- fifo->rx_size = MAX_BUF_LENGTH * sizeof(struct canmsg_t);
- fifo->tx_size = fifo->rx_size;
-
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,3,0))
- init_waitqueue(&fifo->readq);
- init_waitqueue(&fifo->writeq);
-#else
- init_waitqueue_head(&fifo->readq);
- init_waitqueue_head(&fifo->writeq);
-#endif
-
- fifo->rx_in_progress = 0;
- fifo->tx_in_progress = 0;
-
- chip->flags |= BUFFERS_ALLOCATED;
-
- if (chip->chipspecops->pre_read_config(chip,obj)<0)
- CANMSG("Error initializing chip for receiving\n");
-
+ canuser = (struct canuser_t *)kmalloc(sizeof(struct canuser_t), GFP_KERNEL);
+ if(canuser == NULL) goto no_canuser;
+ canuser->flags=0;
+ canuser->userinfo.fileinfo.file = file;
+ canuser->msgobj = obj;
+ canuser->magic = CAN_USER_MAGIC;
+ file->private_data = canuser;
+
+ qends = (struct canque_ends_t *)kmalloc(sizeof(struct canque_ends_t), GFP_KERNEL);
+ if(qends == NULL) goto no_qends;
+ canqueue_ends_init_kern(qends);
+ canuser->qends = qends;
+
+ /*required to synchronize with RT-Linux context*/
+ can_spin_lock_irqsave(&canuser_manipulation_lock, iflags);
+ list_add(&canuser->peers, &obj->obj_users);
+ can_spin_unlock_irqrestore(&canuser_manipulation_lock, iflags);
+
+ if(canqueue_connect_edge(edge=canque_new_edge_kern(MAX_BUF_LENGTH),
+ canuser->qends, obj->qends)<0) goto no_tx_qedge;
+
+ if(canqueue_connect_edge(canuser->rx_edge0=canque_new_edge_kern(MAX_BUF_LENGTH),
+ obj->qends, canuser->qends)<0) goto no_rx_qedge;
+ /*FIXME: more generic model should be used there*/
+ canque_edge_decref(canuser->rx_edge0);
+ canque_edge_decref(edge);
+