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i40e: Separate out DCB capability and enabled flags

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Currently if the firmware reports DCB capability the driver enables
I40E_FLAG_DCB_ENABLED flag. When this flag is enabled the driver
inserts a tag when transmitting a packet from the port even if there
are no DCB traffic classes configured at the port.

This patch adds a new flag I40E_FLAG_DCB_CAPABLE that will be set
when the DCB capability is present and the existing flag
I40E_FLAG_DCB_ENABLED will be set only if there are more than one
traffic classes configured at the port.

Change-ID: I24ccbf53ef293db2eba80c8a9772acf729795bd5
Signed-off-by: Neerav Parikh <neerav.parikh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Neerav Parikh 2014-05-22 06:31:51 +00:00 committed by Jeff Kirsher
parent ddf0b3a63e
commit 4d9b604353
3 changed files with 25 additions and 10 deletions
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1
drivers/net/ethernet/intel/i40e/i40e.h
View file

@ -264,6 +264,7 @@ struct i40e_pf {
#ifdef CONFIG_I40E_VXLAN
#define I40E_FLAG_VXLAN_FILTER_SYNC (u64)(1 << 27)
#endif
#define I40E_FLAG_DCB_CAPABLE (u64)(1 << 29)
/* tracks features that get auto disabled by errors */
u64 auto_disable_flags;

4
drivers/net/ethernet/intel/i40e/i40e_dcb_nl.c
View file

@ -302,8 +302,8 @@ void i40e_dcbnl_setup(struct i40e_vsi *vsi)
struct net_device *dev = vsi->netdev;
struct i40e_pf *pf = i40e_netdev_to_pf(dev);
/* DCB not enabled */
if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
/* Not DCB capable */
if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
return;
/* Do not setup DCB NL ops for MFP mode */

30
drivers/net/ethernet/intel/i40e/i40e_main.c
View file

@ -4130,7 +4130,11 @@ static int i40e_init_pf_dcb(struct i40e_pf *pf)
/* When status is not DISABLED then DCBX in FW */
pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED |
DCB_CAP_DCBX_VER_IEEE;
pf->flags |= I40E_FLAG_DCB_ENABLED;
pf->flags |= I40E_FLAG_DCB_CAPABLE;
/* Enable DCB tagging only when more than one TC */
if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
pf->flags |= I40E_FLAG_DCB_ENABLED;
}
} else {
dev_info(&pf->pdev->dev, "AQ Querying DCB configuration failed: %d\n",
@ -4685,6 +4689,10 @@ static int i40e_handle_lldp_event(struct i40e_pf *pf,
int ret = 0;
u8 type;
/* Not DCB capable or capability disabled */
if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
return ret;
/* Ignore if event is not for Nearest Bridge */
type = ((mib->type >> I40E_AQ_LLDP_BRIDGE_TYPE_SHIFT)
& I40E_AQ_LLDP_BRIDGE_TYPE_MASK);
@ -4726,6 +4734,12 @@ static int i40e_handle_lldp_event(struct i40e_pf *pf,
if (!need_reconfig)
goto exit;
/* Enable DCB tagging only when more than one TC */
if (i40e_dcb_get_num_tc(dcbx_cfg) > 1)
pf->flags |= I40E_FLAG_DCB_ENABLED;
else
pf->flags &= ~I40E_FLAG_DCB_ENABLED;
/* Reconfiguration needed quiesce all VSIs */
i40e_pf_quiesce_all_vsi(pf);
@ -6365,7 +6379,7 @@ static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
if (err) {
pf->flags &= ~(I40E_FLAG_MSIX_ENABLED |
I40E_FLAG_RSS_ENABLED |
I40E_FLAG_DCB_ENABLED |
I40E_FLAG_DCB_CAPABLE |
I40E_FLAG_SRIOV_ENABLED |
I40E_FLAG_FD_SB_ENABLED |
I40E_FLAG_FD_ATR_ENABLED |
@ -8187,13 +8201,13 @@ static void i40e_determine_queue_usage(struct i40e_pf *pf)
pf->flags &= ~(I40E_FLAG_RSS_ENABLED |
I40E_FLAG_FD_SB_ENABLED |
I40E_FLAG_FD_ATR_ENABLED |
I40E_FLAG_DCB_ENABLED |
I40E_FLAG_DCB_CAPABLE |
I40E_FLAG_SRIOV_ENABLED |
I40E_FLAG_VMDQ_ENABLED);
} else if (!(pf->flags & (I40E_FLAG_RSS_ENABLED |
I40E_FLAG_FD_SB_ENABLED |
I40E_FLAG_FD_ATR_ENABLED |
I40E_FLAG_DCB_ENABLED))) {
I40E_FLAG_DCB_CAPABLE))) {
/* one qp for PF */
pf->rss_size = pf->num_lan_qps = 1;
queues_left -= pf->num_lan_qps;
@ -8205,9 +8219,9 @@ static void i40e_determine_queue_usage(struct i40e_pf *pf)
I40E_FLAG_VMDQ_ENABLED);
} else {
/* Not enough queues for all TCs */
if ((pf->flags & I40E_FLAG_DCB_ENABLED) &&
if ((pf->flags & I40E_FLAG_DCB_CAPABLE) &&
(queues_left < I40E_MAX_TRAFFIC_CLASS)) {
pf->flags &= ~I40E_FLAG_DCB_ENABLED;
pf->flags &= ~I40E_FLAG_DCB_CAPABLE;
dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
}
pf->num_lan_qps = pf->rss_size_max;
@ -8300,7 +8314,7 @@ static void i40e_print_features(struct i40e_pf *pf)
buf += sprintf(buf, "FD_SB ");
buf += sprintf(buf, "NTUPLE ");
}
if (pf->flags & I40E_FLAG_DCB_ENABLED)
if (pf->flags & I40E_FLAG_DCB_CAPABLE)
buf += sprintf(buf, "DCB ");
if (pf->flags & I40E_FLAG_PTP)
buf += sprintf(buf, "PTP ");
@ -8486,7 +8500,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
err = i40e_init_pf_dcb(pf);
if (err) {
dev_info(&pdev->dev, "init_pf_dcb failed: %d\n", err);
pf->flags &= ~I40E_FLAG_DCB_ENABLED;
pf->flags &= ~I40E_FLAG_DCB_CAPABLE;
/* Continue without DCB enabled */
}
#endif /* CONFIG_I40E_DCB */