Author: manu
Date: Fri Nov 20 11:31:04 2020
New Revision: 367887
URL: https://svnweb.freebsd.org/changeset/base/367887
Log:
if_dwc: Add flow control support
Modified:
head/sys/dev/dwc/if_dwc.c
head/sys/dev/dwc/if_dwc.h
Modified: head/sys/dev/dwc/if_dwc.c
==============================================================================
--- head/sys/dev/dwc/if_dwc.c Fri Nov 20 11:30:44 2020 (r367886)
+++ head/sys/dev/dwc/if_dwc.c Fri Nov 20 11:31:04 2020 (r367887)
@@ -224,6 +224,10 @@ static void dwc_stop_dma(struct dwc_softc *sc);
static void dwc_tick(void *arg);
+/* Pause time field in the transmitted control frame */
+static int dwc_pause_time = 0xffff;
+TUNABLE_INT("hw.dwc.pause_time", &dwc_pause_time);
+
/*
* MIIBUS functions
*/
@@ -333,6 +337,15 @@ dwc_miibus_statchg(device_t dev)
else
reg &= ~(CONF_DM);
WRITE4(sc, MAC_CONFIGURATION, reg);
+
+ reg = FLOW_CONTROL_UP;
+ if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_TXPAUSE) != 0)
+ reg |= FLOW_CONTROL_TX;
+ if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_RXPAUSE) != 0)
+ reg |= FLOW_CONTROL_RX;
+ if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0)
+ reg |= dwc_pause_time << FLOW_CONTROL_PT_SHIFT;
+ WRITE4(sc, FLOW_CONTROL, reg);
IF_DWC_SET_SPEED(dev, IFM_SUBTYPE(mii->mii_media_active));
Modified: head/sys/dev/dwc/if_dwc.h
==============================================================================
--- head/sys/dev/dwc/if_dwc.h Fri Nov 20 11:30:44 2020 (r367886)
+++ head/sys/dev/dwc/if_dwc.h Fri Nov 20 11:31:04 2020 (r367887)
@@ -70,6 +70,10 @@
#define GMII_ADDRESS_GB (1 << 0) /* Busy */
#define GMII_DATA 0x14
#define FLOW_CONTROL 0x18
+#define FLOW_CONTROL_PT_SHIFT 16
+#define FLOW_CONTROL_UP (1 << 3) /* Unicast pause enable
*/
+#define FLOW_CONTROL_RX (1 << 2) /* RX Flow control
enable */
+#define FLOW_CONTROL_TX (1 << 1) /* TX Flow control
enable */
#define GMAC_VLAN_TAG 0x1C
#define VERSION 0x20
#define DEBUG 0x24
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