Structured comments updated.

[lincan.git] / lincan / src / devcommon.c

diff --git a/lincan/src/devcommon.c b/lincan/src/devcommon.c
index 9cd29d00e2a398b101e278a430a4d4356ce868c6..bf6585a42adf4d6e511224474f698b5e05511bbd 100644 (file)
--- a/lincan/src/devcommon.c
+++ b/lincan/src/devcommon.c
@@ -6,20 +6,44 @@
  * Version lincan-0.2  9 Jul 2003
  */
 
-#define __NO_VERSION__
-#include <linux/module.h>
-#include <linux/version.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0))
-#include <linux/malloc.h>
-#else
-#include <linux/slab.h>
-#endif
-#include <linux/wait.h>
 #include "../include/can.h"
+#include "../include/can_sysdep.h"
 #include "../include/can_queue.h"
 #include "../include/main.h"
 #include "../include/devcommon.h"
 
+#ifdef CAN_WITH_RTL
+static inline
+void canqueue_wake_chip_worker(struct canque_ends_t *qends, struct chip_t *chip, struct msgobj_t *obj)
+{
+       if(qends->endinfo.chipinfo.worker_thread){
+               can_msgobj_set_fl(obj,WORKER_WAKE);
+               pthread_kill(qends->endinfo.chipinfo.worker_thread,RTL_SIGNAL_WAKEUP);
+               rtl_schedule();
+       } else {
+               set_bit(MSGOBJ_TX_REQUEST_b,&chip->pend_flags);
+               if(chip->worker_thread) {
+                       set_bit(MSGOBJ_WORKER_WAKE_b,&chip->pend_flags);
+                       pthread_kill(chip->worker_thread,RTL_SIGNAL_WAKEUP);
+                       rtl_schedule();
+               }
+       }
+}
+
+#endif /*CAN_WITH_RTL*/
+
+
+/**
+ * canqueue_notify_chip - notification callback handler for CAN chips ends of queues
+ * @qends: pointer to the callback side ends structure
+ * @qedge: edge which invoked notification 
+ * @what: notification type
+ *
+ * This function has to deal with more possible cases. It can be called from
+ * the kernel or interrupt context for Linux only compilation of driver.
+ * The function can be called from kernel context or RT-Linux thread context
+ * for mixed mode Linux/RT-Linux compilation.
+ */
 void canqueue_notify_chip(struct canque_ends_t *qends, struct canque_edge_t *qedge, int what)
 {
        struct chip_t *chip=qends->endinfo.chipinfo.chip;
@@ -30,23 +54,45 @@ void canqueue_notify_chip(struct canque_ends_t *qends, struct canque_edge_t *qed
                /*case CANQUEUE_NOTIFY_EMPTY:*/
                /*case CANQUEUE_NOTIFY_SPACE:*/
                /*case CANQUEUE_NOTIFY_NOUSR:
-                       wake_up_interruptible(&qends->endinfo.chipinfo.daemonq);
+                       wake_up(&qends->endinfo.chipinfo.daemonq);
                        break;*/
                case CANQUEUE_NOTIFY_PROC:
-                       /*wake_up_interruptible(&qends->endinfo.chipinfo.daemonq);*/
+                   #ifndef CAN_WITH_RTL
+                       /*wake_up(&qends->endinfo.chipinfo.daemonq);*/
                        chip->chipspecops->wakeup_tx(chip, obj);
+                   #else /*CAN_WITH_RTL*/
+                       can_msgobj_set_fl(obj,TX_REQUEST);
+                       canqueue_wake_chip_worker(qends, chip, obj);
+                   #endif /*CAN_WITH_RTL*/
                        break;
+               case CANQUEUE_NOTIFY_DEAD_WANTED:
                case CANQUEUE_NOTIFY_DEAD:
-                       if(atomic_read(&qedge->edge_used)>0)
-                               atomic_dec(&qedge->edge_used);
+                       if(canque_fifo_test_and_clear_fl(&qedge->fifo, READY))
+                               canque_edge_decref(qedge);
                        break;
-               case CANQUEUE_NOTIFY_ATACH:
-                       atomic_inc(&qedge->edge_used);
+               case CANQUEUE_NOTIFY_ATTACH:
+                       break;
+               case CANQUEUE_NOTIFY_FILTCH:
+                       if(!chip->chipspecops->filtch_rq)
+                               break;
+                   #ifndef CAN_WITH_RTL
+                       chip->chipspecops->filtch_rq(chip, obj);
+                   #else /*CAN_WITH_RTL*/
+                       can_msgobj_set_fl(obj,FILTCH_REQUEST);
+                       canqueue_wake_chip_worker(qends, chip, obj);
+                   #endif /*CAN_WITH_RTL*/
+                       
                        break;
        }
 }
 
 
+/**
+ * canqueue_ends_init_chip - CAN chip specific ends initialization
+ * @qends: pointer to the ends structure
+ * @chip: pointer to the corresponding CAN chip structure
+ * @obj: pointer to the corresponding message object structure
+ */
 int canqueue_ends_init_chip(struct canque_ends_t *qends, struct chip_t *chip, struct msgobj_t *obj)
 {
        int ret;
@@ -54,7 +100,9 @@ int canqueue_ends_init_chip(struct canque_ends_t *qends, struct chip_t *chip, st
        if(ret<0) return ret;
        
        qends->context=NULL;
+    #ifndef CAN_WITH_RTL
        init_waitqueue_head(&qends->endinfo.chipinfo.daemonq);
+    #endif /*CAN_WITH_RTL*/
        qends->endinfo.chipinfo.chip=chip;
        qends->endinfo.chipinfo.msgobj=obj;
        qends->notify=canqueue_notify_chip;
@@ -64,3 +112,20 @@ int canqueue_ends_init_chip(struct canque_ends_t *qends, struct chip_t *chip, st
 }
 
 
+/**
+ * canqueue_ends_done_chip - finalizing of the ends structure for CAN chips
+ * @qends: pointer to ends structure
+ *
+ * Return Value: Function should be designed such way to not fail.
+ */
+int canqueue_ends_done_chip(struct canque_ends_t *qends)
+{
+       int delayed;
+       
+       /* Finish or kill all outgoing edges listed in inends */
+       delayed=canqueue_ends_kill_inlist(qends, 1);
+       /* Kill all incoming edges listed in outends */
+       delayed|=canqueue_ends_kill_outlist(qends);
+
+       return delayed;
+}