mISDN: Allow to set a minimum length for transparent data
If the FIFO of the card is small, many short messages are queued up to
the upper layers and the userspace. This change allows the applications
to set a minimum datalen they want from the drivers.
Create a common control function to avoid code duplication in each
driver.
Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/mISDNhw.h b/include/linux/mISDNhw.h
index a86d86b..226886c 100644
--- a/include/linux/mISDNhw.h
+++ b/include/linux/mISDNhw.h
@@ -154,7 +154,12 @@
struct timer_list timer;
/* receive data */
struct sk_buff *rx_skb;
- int maxlen;
+ unsigned short maxlen;
+ unsigned short init_maxlen; /* initial value */
+ unsigned short next_maxlen; /* pending value */
+ unsigned short minlen; /* for transparent data */
+ unsigned short init_minlen; /* initial value */
+ unsigned short next_minlen; /* pending value */
/* send data */
struct sk_buff *next_skb;
struct sk_buff *tx_skb;
@@ -169,10 +174,12 @@
};
extern int mISDN_initdchannel(struct dchannel *, int, void *);
-extern int mISDN_initbchannel(struct bchannel *, int);
+extern int mISDN_initbchannel(struct bchannel *, unsigned short,
+ unsigned short);
extern int mISDN_freedchannel(struct dchannel *);
extern void mISDN_clear_bchannel(struct bchannel *);
extern int mISDN_freebchannel(struct bchannel *);
+extern int mISDN_ctrl_bchannel(struct bchannel *, struct mISDN_ctrl_req *);
extern void queue_ch_frame(struct mISDNchannel *, u_int,
int, struct sk_buff *);
extern int dchannel_senddata(struct dchannel *, struct sk_buff *);
@@ -180,7 +187,7 @@
extern int bchannel_get_rxbuf(struct bchannel *, int);
extern void recv_Dchannel(struct dchannel *);
extern void recv_Echannel(struct dchannel *, struct dchannel *);
-extern void recv_Bchannel(struct bchannel *, unsigned int id);
+extern void recv_Bchannel(struct bchannel *, unsigned int, bool);
extern void recv_Dchannel_skb(struct dchannel *, struct sk_buff *);
extern void recv_Bchannel_skb(struct bchannel *, struct sk_buff *);
extern int get_next_bframe(struct bchannel *);
diff --git a/include/linux/mISDNif.h b/include/linux/mISDNif.h
index ce6e613..246a352 100644
--- a/include/linux/mISDNif.h
+++ b/include/linux/mISDNif.h
@@ -37,7 +37,7 @@
*/
#define MISDN_MAJOR_VERSION 1
#define MISDN_MINOR_VERSION 1
-#define MISDN_RELEASE 28
+#define MISDN_RELEASE 29
/* primitives for information exchange
* generell format
@@ -365,6 +365,7 @@
#define MISDN_CTRL_LOOP 0x0001
#define MISDN_CTRL_CONNECT 0x0002
#define MISDN_CTRL_DISCONNECT 0x0004
+#define MISDN_CTRL_RX_BUFFER 0x0008
#define MISDN_CTRL_PCMCONNECT 0x0010
#define MISDN_CTRL_PCMDISCONNECT 0x0020
#define MISDN_CTRL_SETPEER 0x0040
@@ -387,6 +388,12 @@
#define MISDN_CTRL_HFC_WD_INIT 0x4009
#define MISDN_CTRL_HFC_WD_RESET 0x400A
+/* special RX buffer value for MISDN_CTRL_RX_BUFFER request.p1 is the minimum
+ * buffer size request.p2 the maximum. Using MISDN_CTRL_RX_SIZE_IGNORE will
+ * not change the value, but still read back the actual stetting.
+ */
+#define MISDN_CTRL_RX_SIZE_IGNORE -1
+
/* socket options */
#define MISDN_TIME_STAMP 0x0001