b43: Rewrite TX power adjustment
This patch rewrites the TX power recalculation algorithms to scale better
with changed enviromnent. If there's low
TX traffic, the power will be checked against the desired values
every 60 seconds.
If there is high TX traffic, the check is redone every 2 seconds. This improves
the reaction times a lot and confuses the rate control less.
It will also reduce the time it initially takes to tune to a new TX power
value. With the old algorithm it could take about 30 to 45 seconds to settle to
a new power value. This will happen in about two to four seconds now.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index fc28015..f9c8161 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -173,6 +173,11 @@
#define B43_SHM_SH_CHAN 0x00A0 /* Current channel (low 8bit only) */
#define B43_SHM_SH_CHAN_5GHZ 0x0100 /* Bit set, if 5Ghz channel */
#define B43_SHM_SH_BCMCFIFOID 0x0108 /* Last posted cookie to the bcast/mcast FIFO */
+/* TSSI information */
+#define B43_SHM_SH_TSSI_CCK 0x0058 /* TSSI for last 4 CCK frames (32bit) */
+#define B43_SHM_SH_TSSI_OFDM_A 0x0068 /* TSSI for last 4 OFDM frames (32bit) */
+#define B43_SHM_SH_TSSI_OFDM_G 0x0070 /* TSSI for last 4 OFDM frames (32bit) */
+#define B43_TSSI_MAX 0x7F /* Max value for one TSSI value */
/* SHM_SHARED TX FIFO variables */
#define B43_SHM_SH_SIZE01 0x0098 /* TX FIFO size for FIFO 0 (low) and 1 (high) */
#define B43_SHM_SH_SIZE23 0x009A /* TX FIFO size for FIFO 2 and 3 */
@@ -648,6 +653,11 @@
struct b43_qos_params qos_params[4];
/* Workqueue for updating QOS parameters in hardware. */
struct work_struct qos_update_work;
+
+ /* Work for adjustment of the transmission power.
+ * This is scheduled when we determine that the actual TX output
+ * power doesn't match what we want. */
+ struct work_struct txpower_adjust_work;
};
/* In-memory representation of a cached microcode file. */