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amd-xgbe: Fix the mapping of priorities to traffic classes 

The driver is checking the pfc_en field of the ieee_pfc structure to
determine whether to associate a priority with a traffic class. This is
incorrect since the pfc_en field is for determining if PFC is enabled
for a traffic class.

The association of priority to traffic class does not depend on whether
the traffic class is enabled for PFC, so remove that check. Also, the
mapping of priorities to traffic classes should be done when configuring
the traffic classes and not the PFC support so move the priority to traffic
class association from xgbe_config_dcb_pfc to xgbe_config_dcb_tc.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas 2016-02-17 11:48:57 -06:00 committed by David S. Miller
parent 8dba2a2a88
commit 6a49ee4e1b
1 changed files with 21 additions and 29 deletions
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50
drivers/net/ethernet/amd/xgbe/xgbe-dev.c
View File

@ -1329,7 +1329,8 @@ static void xgbe_config_dcb_tc(struct xgbe_prv_data *pdata)
{
struct ieee_ets *ets = pdata->ets;
unsigned int total_weight, min_weight, weight;
unsigned int i;
unsigned int mask, reg, reg_val;
unsigned int i, prio;
if (!ets)
return;
@ -1346,6 +1347,25 @@ static void xgbe_config_dcb_tc(struct xgbe_prv_data *pdata)
min_weight = 1;
for (i = 0; i < pdata->hw_feat.tc_cnt; i++) {
/* Map the priorities to the traffic class */
mask = 0;
for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; prio++) {
if (ets->prio_tc[prio] == i)
mask |= (1 << prio);
}
mask &= 0xff;
netif_dbg(pdata, drv, pdata->netdev, "TC%u PRIO mask=%#x\n",
i, mask);
reg = MTL_TCPM0R + (MTL_TCPM_INC * (i / MTL_TCPM_TC_PER_REG));
reg_val = XGMAC_IOREAD(pdata, reg);
reg_val &= ~(0xff << ((i % MTL_TCPM_TC_PER_REG) << 3));
reg_val |= (mask << ((i % MTL_TCPM_TC_PER_REG) << 3));
XGMAC_IOWRITE(pdata, reg, reg_val);
/* Set the traffic class algorithm */
switch (ets->tc_tsa[i]) {
case IEEE_8021QAZ_TSA_STRICT:
netif_dbg(pdata, drv, pdata->netdev,
@ -1370,34 +1390,6 @@ static void xgbe_config_dcb_tc(struct xgbe_prv_data *pdata)
static void xgbe_config_dcb_pfc(struct xgbe_prv_data *pdata)
{
struct ieee_pfc *pfc = pdata->pfc;
struct ieee_ets *ets = pdata->ets;
unsigned int mask, reg, reg_val;
unsigned int tc, prio;
if (!pfc || !ets)
return;
for (tc = 0; tc < pdata->hw_feat.tc_cnt; tc++) {
mask = 0;
for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; prio++) {
if ((pfc->pfc_en & (1 << prio)) &&
(ets->prio_tc[prio] == tc))
mask |= (1 << prio);
}
mask &= 0xff;
netif_dbg(pdata, drv, pdata->netdev, "TC%u PFC mask=%#x\n",
tc, mask);
reg = MTL_TCPM0R + (MTL_TCPM_INC * (tc / MTL_TCPM_TC_PER_REG));
reg_val = XGMAC_IOREAD(pdata, reg);
reg_val &= ~(0xff << ((tc % MTL_TCPM_TC_PER_REG) << 3));
reg_val |= (mask << ((tc % MTL_TCPM_TC_PER_REG) << 3));
XGMAC_IOWRITE(pdata, reg, reg_val);
}
xgbe_config_flow_control(pdata);
}