i40e: Support for NPAR iSCSI partition with DCB
Add parsing and reporting of iSCSI capability for a given device or
function.
Also add support for iSCSI partition type with DCB in NPAR mode.
In this mode it is expected that software would configure both the LAN
and iSCSI traffic classes for the iSCSI partition; whereas all the NIC
type partitions will use LAN TC (TC0) only.
Hence, the patch enables querying of DCB configuration in MFP mode and
configures TCs for iSCSI partition type.
Though NIC type partitions may not have more than 1 TC enabled for them
the port may have multiple TCs enabled and hence I40E_FLAG_DCB_ENABLED
will be set/reset on all the partitions based on number of TCs on the
port. This is required as in DCB environment it is expected that all
traffic will be priority tagged.
Change-ID: I8c6e1cfd46c46d8a39c57d9020d9ff8d42ed8a7d
Signed-off-by: Neerav Parikh <neerav.parikh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index d7efc1c..f1256f9 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -4002,6 +4002,35 @@
#endif
/**
+ * i40e_get_iscsi_tc_map - Return TC map for iSCSI APP
+ * @pf: pointer to pf
+ *
+ * Get TC map for ISCSI PF type that will include iSCSI TC
+ * and LAN TC.
+ **/
+static u8 i40e_get_iscsi_tc_map(struct i40e_pf *pf)
+{
+ struct i40e_dcb_app_priority_table app;
+ struct i40e_hw *hw = &pf->hw;
+ u8 enabled_tc = 1; /* TC0 is always enabled */
+ u8 tc, i;
+ /* Get the iSCSI APP TLV */
+ struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
+
+ for (i = 0; i < dcbcfg->numapps; i++) {
+ app = dcbcfg->app[i];
+ if (app.selector == I40E_APP_SEL_TCPIP &&
+ app.protocolid == I40E_APP_PROTOID_ISCSI) {
+ tc = dcbcfg->etscfg.prioritytable[app.priority];
+ enabled_tc |= (1 << tc);
+ break;
+ }
+ }
+
+ return enabled_tc;
+}
+
+/**
* i40e_dcb_get_num_tc - Get the number of TCs from DCBx config
* @dcbcfg: the corresponding DCBx configuration structure
*
@@ -4064,18 +4093,23 @@
if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
return 1;
- /* MFP mode return count of enabled TCs for this PF */
- if (pf->flags & I40E_FLAG_MFP_ENABLED) {
- enabled_tc = pf->hw.func_caps.enabled_tcmap;
- for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
- if (enabled_tc & (1 << i))
- num_tc++;
- }
- return num_tc;
- }
-
/* SFP mode will be enabled for all TCs on port */
- return i40e_dcb_get_num_tc(dcbcfg);
+ if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
+ return i40e_dcb_get_num_tc(dcbcfg);
+
+ /* MFP mode return count of enabled TCs for this PF */
+ if (pf->hw.func_caps.iscsi)
+ enabled_tc = i40e_get_iscsi_tc_map(pf);
+ else
+ enabled_tc = pf->hw.func_caps.enabled_tcmap;
+
+ /* At least have TC0 */
+ enabled_tc = (enabled_tc ? enabled_tc : 0x1);
+ for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
+ if (enabled_tc & (1 << i))
+ num_tc++;
+ }
+ return num_tc;
}
/**
@@ -4113,12 +4147,15 @@
if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
return i40e_pf_get_default_tc(pf);
- /* MFP mode will have enabled TCs set by FW */
- if (pf->flags & I40E_FLAG_MFP_ENABLED)
- return pf->hw.func_caps.enabled_tcmap;
-
/* SFP mode we want PF to be enabled for all TCs */
- return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
+ if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
+ return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
+
+ /* MPF enabled and iSCSI PF type */
+ if (pf->hw.func_caps.iscsi)
+ return i40e_get_iscsi_tc_map(pf);
+ else
+ return pf->hw.func_caps.enabled_tcmap;
}
/**
@@ -4508,9 +4545,6 @@
struct i40e_hw *hw = &pf->hw;
int err = 0;
- if (pf->hw.func_caps.npar_enable)
- goto out;
-
/* Get the initial DCB configuration */
err = i40e_init_dcb(hw);
if (!err) {
@@ -7784,7 +7818,8 @@
enabled_tc = i40e_pf_get_tc_map(pf);
/* MFP mode setup queue map and update VSI */
- if (pf->flags & I40E_FLAG_MFP_ENABLED) {
+ if ((pf->flags & I40E_FLAG_MFP_ENABLED) &&
+ !(pf->hw.func_caps.iscsi)) { /* NIC type PF */
memset(&ctxt, 0, sizeof(ctxt));
ctxt.seid = pf->main_vsi_seid;
ctxt.pf_num = pf->hw.pf_id;
@@ -7805,6 +7840,8 @@
/* Default/Main VSI is only enabled for TC0
* reconfigure it to enable all TCs that are
* available on the port in SFP mode.
+ * For MFP case the iSCSI PF would use this
+ * flow to enable LAN+iSCSI TC.
*/
ret = i40e_vsi_config_tc(vsi, enabled_tc);
if (ret) {