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if_dwc: Add flow control support

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This commit is contained in:
Emmanuel Vadot 2020-11-20 11:31:04 +00:00
parent 354cb625ee
commit 2b4a66ed17
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=367887
2 changed files with 17 additions and 0 deletions
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13
sys/dev/dwc/if_dwc.c
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@ -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
*/
@ -334,6 +338,15 @@ dwc_miibus_statchg(device_t dev)
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));
}

4
sys/dev/dwc/if_dwc.h
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@ -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