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cxgb4 : Improve IEEE DCBx support, other minor open-lldp fixes

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* Add support for IEEE ets & pfc api.
* Fix bug that resulted in incorrect bandwidth percentage being returned for
  CEE peers
* Convert pfc enabled info from firmware format to what dcbnl expects before
  returning

Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Anish Bhatt 2015-01-30 17:20:17 -08:00 committed by David S. Miller
parent 98830dd0fe
commit ba0c39cb98
2 changed files with 107 additions and 2 deletions
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98
drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c
View File

@ -428,7 +428,10 @@ static void cxgb4_getpgtccfg(struct net_device *dev, int tc,
}
*pgid = (be32_to_cpu(pcmd.u.dcb.pgid.pgid) >> (tc * 4)) & 0xf;
INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
if (local)
INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
else
INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
if (err != FW_PORT_DCB_CFG_SUCCESS) {
@ -900,6 +903,88 @@ cxgb4_ieee_negotiation_complete(struct net_device *dev,
(dcb->supported & DCB_CAP_DCBX_VER_IEEE));
}
static int cxgb4_ieee_read_ets(struct net_device *dev, struct ieee_ets *ets,
int local)
{
struct port_info *pi = netdev2pinfo(dev);
struct port_dcb_info *dcb = &pi->dcb;
struct adapter *adap = pi->adapter;
uint32_t tc_info;
struct fw_port_cmd pcmd;
int i, bwg, err;
if (!(dcb->msgs & (CXGB4_DCB_FW_PGID | CXGB4_DCB_FW_PGRATE)))
return 0;
ets->ets_cap = dcb->pg_num_tcs_supported;
if (local) {
ets->willing = 1;
INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
} else {
INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
}
pcmd.u.dcb.pgid.type = FW_PORT_DCB_TYPE_PGID;
err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
if (err != FW_PORT_DCB_CFG_SUCCESS) {
dev_err(adap->pdev_dev, "DCB read PGID failed with %d\n", -err);
return err;
}
tc_info = be32_to_cpu(pcmd.u.dcb.pgid.pgid);
if (local)
INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
else
INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
if (err != FW_PORT_DCB_CFG_SUCCESS) {
dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
-err);
return err;
}
for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
bwg = (tc_info >> ((7 - i) * 4)) & 0xF;
ets->prio_tc[i] = bwg;
ets->tc_tx_bw[i] = pcmd.u.dcb.pgrate.pgrate[i];
ets->tc_rx_bw[i] = ets->tc_tx_bw[i];
ets->tc_tsa[i] = pcmd.u.dcb.pgrate.tsa[i];
}
return 0;
}
static int cxgb4_ieee_get_ets(struct net_device *dev, struct ieee_ets *ets)
{
return cxgb4_ieee_read_ets(dev, ets, 1);
}
/* We reuse this for peer PFC as well, as we can't have it enabled one way */
static int cxgb4_ieee_get_pfc(struct net_device *dev, struct ieee_pfc *pfc)
{
struct port_info *pi = netdev2pinfo(dev);
struct port_dcb_info *dcb = &pi->dcb;
memset(pfc, 0, sizeof(struct ieee_pfc));
if (!(dcb->msgs & CXGB4_DCB_FW_PFC))
return 0;
pfc->pfc_cap = dcb->pfc_num_tcs_supported;
pfc->pfc_en = bitswap_1(dcb->pfcen);
return 0;
}
static int cxgb4_ieee_peer_ets(struct net_device *dev, struct ieee_ets *ets)
{
return cxgb4_ieee_read_ets(dev, ets, 0);
}
/* Fill in the Application User Priority Map associated with the
* specified Application.
* Priority for IEEE dcb_app is an integer, with 0 being a valid value
@ -1106,14 +1191,23 @@ static int cxgb4_cee_peer_getpfc(struct net_device *dev, struct cee_pfc *pfc)
struct port_info *pi = netdev2pinfo(dev);
cxgb4_getnumtcs(dev, DCB_NUMTCS_ATTR_PFC, &(pfc->tcs_supported));
pfc->pfc_en = pi->dcb.pfcen;
/* Firmware sends this to us in a formwat that is a bit flipped version
* of spec, correct it before we send it to host. This is taken care of
* by bit shifting in other uses of pfcen
*/
pfc->pfc_en = bitswap_1(pi->dcb.pfcen);
return 0;
}
const struct dcbnl_rtnl_ops cxgb4_dcb_ops = {
.ieee_getets = cxgb4_ieee_get_ets,
.ieee_getpfc = cxgb4_ieee_get_pfc,
.ieee_getapp = cxgb4_ieee_getapp,
.ieee_setapp = cxgb4_ieee_setapp,
.ieee_peer_getets = cxgb4_ieee_peer_ets,
.ieee_peer_getpfc = cxgb4_ieee_get_pfc,
/* CEE std */
.getstate = cxgb4_getstate,

11
drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.h
View File

@ -136,6 +136,17 @@ void cxgb4_dcb_handle_fw_update(struct adapter *, const struct fw_port_cmd *);
void cxgb4_dcb_set_caps(struct adapter *, const struct fw_port_cmd *);
extern const struct dcbnl_rtnl_ops cxgb4_dcb_ops;
static inline __u8 bitswap_1(unsigned char val)
{
return ((val & 0x80) >> 7) |
((val & 0x40) >> 5) |
((val & 0x20) >> 3) |
((val & 0x10) >> 1) |
((val & 0x08) << 1) |
((val & 0x04) << 3) |
((val & 0x02) << 5) |
((val & 0x01) << 7);
}
#define CXGB4_DCB_ENABLED true
#else /* !CONFIG_CHELSIO_T4_DCB */