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Date: Fri, 27 Aug 2021 10:25:12 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net, kuba@...nel.org
Cc: Vinicius Costa Gomes <vinicius.gomes@...el.com>,
netdev@...r.kernel.org, anthony.l.nguyen@...el.com,
sasha.neftin@...el.com, vitaly.lifshits@...el.com,
Aravindhan Gunasekaran <aravindhan.gunasekaran@...el.com>,
Mallikarjuna Chilakala <mallikarjuna.chilakala@...el.com>,
Dvora Fuxbrumer <dvorax.fuxbrumer@...ux.intel.com>
Subject: [PATCH net-next 2/3] igc: Simplify TSN flags handling
From: Vinicius Costa Gomes <vinicius.gomes@...el.com>
Separates the procedure done during reset from applying a
configuration, knowing when the code is executing allow us to
separate the better what changes the hardware state from what
changes only the driver state.
Introduces a flag for bookkeeping the driver state of TSN
features. When Qav and frame-preemption is also implemented
this flag makes it easier to keep track on whether a TSN feature
driver state is enabled or not though controller state changes,
say, during a reset.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>
Signed-off-by: Aravindhan Gunasekaran <aravindhan.gunasekaran@...el.com>
Signed-off-by: Mallikarjuna Chilakala <mallikarjuna.chilakala@...el.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@...ux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
drivers/net/ethernet/intel/igc/igc.h | 2 +
drivers/net/ethernet/intel/igc/igc_main.c | 2 +-
drivers/net/ethernet/intel/igc/igc_tsn.c | 65 ++++++++++++++---------
drivers/net/ethernet/intel/igc/igc_tsn.h | 1 +
4 files changed, 43 insertions(+), 27 deletions(-)
diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
index 2d17a6da63cf..b561beb1e623 100644
--- a/drivers/net/ethernet/intel/igc/igc.h
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -291,6 +291,8 @@ extern char igc_driver_name[];
#define IGC_FLAG_RX_LEGACY BIT(16)
#define IGC_FLAG_TSN_QBV_ENABLED BIT(17)
+#define IGC_FLAG_TSN_ANY_ENABLED IGC_FLAG_TSN_QBV_ENABLED
+
#define IGC_FLAG_RSS_FIELD_IPV4_UDP BIT(6)
#define IGC_FLAG_RSS_FIELD_IPV6_UDP BIT(7)
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 411d6caa27b5..2e5c9b5a57d1 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -120,7 +120,7 @@ void igc_reset(struct igc_adapter *adapter)
igc_ptp_reset(adapter);
/* Re-enable TSN offloading, where applicable. */
- igc_tsn_offload_apply(adapter);
+ igc_tsn_reset(adapter);
igc_get_phy_info(hw);
}
diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c
index 5bcdf7583505..2935d57c593d 100644
--- a/drivers/net/ethernet/intel/igc/igc_tsn.c
+++ b/drivers/net/ethernet/intel/igc/igc_tsn.c
@@ -18,8 +18,21 @@ static bool is_any_launchtime(struct igc_adapter *adapter)
return false;
}
+static unsigned int igc_tsn_new_flags(struct igc_adapter *adapter)
+{
+ unsigned int new_flags = adapter->flags & ~IGC_FLAG_TSN_ANY_ENABLED;
+
+ if (adapter->base_time)
+ new_flags |= IGC_FLAG_TSN_QBV_ENABLED;
+
+ if (is_any_launchtime(adapter))
+ new_flags |= IGC_FLAG_TSN_QBV_ENABLED;
+
+ return new_flags;
+}
+
/* Returns the TSN specific registers to their default values after
- * TSN offloading is disabled.
+ * the adapter is reset.
*/
static int igc_tsn_disable_offload(struct igc_adapter *adapter)
{
@@ -27,11 +40,6 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter)
u32 tqavctrl;
int i;
- if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED))
- return 0;
-
- adapter->cycle_time = 0;
-
wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT);
wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_DEFAULT);
@@ -62,9 +70,6 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter)
ktime_t base_time, systim;
int i;
- if (adapter->flags & IGC_FLAG_TSN_QBV_ENABLED)
- return 0;
-
cycle = adapter->cycle_time;
base_time = adapter->base_time;
@@ -119,33 +124,41 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter)
wr32(IGC_BASET_H, baset_h);
wr32(IGC_BASET_L, baset_l);
- adapter->flags |= IGC_FLAG_TSN_QBV_ENABLED;
-
return 0;
}
-int igc_tsn_offload_apply(struct igc_adapter *adapter)
+int igc_tsn_reset(struct igc_adapter *adapter)
{
- bool is_any_enabled = adapter->base_time || is_any_launchtime(adapter);
+ unsigned int new_flags;
+ int err = 0;
- if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED) && !is_any_enabled)
- return 0;
+ new_flags = igc_tsn_new_flags(adapter);
+
+ if (!(new_flags & IGC_FLAG_TSN_ANY_ENABLED))
+ return igc_tsn_disable_offload(adapter);
+
+ err = igc_tsn_enable_offload(adapter);
+ if (err < 0)
+ return err;
- if (!is_any_enabled) {
- int err = igc_tsn_disable_offload(adapter);
+ adapter->flags = new_flags;
- if (err < 0)
- return err;
+ return err;
+}
- /* The BASET registers aren't cleared when writing
- * into them, force a reset if the interface is
- * running.
- */
- if (netif_running(adapter->netdev))
- schedule_work(&adapter->reset_task);
+int igc_tsn_offload_apply(struct igc_adapter *adapter)
+{
+ int err;
+ if (netif_running(adapter->netdev)) {
+ schedule_work(&adapter->reset_task);
return 0;
}
- return igc_tsn_enable_offload(adapter);
+ err = igc_tsn_enable_offload(adapter);
+ if (err < 0)
+ return err;
+
+ adapter->flags = igc_tsn_new_flags(adapter);
+ return 0;
}
diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.h b/drivers/net/ethernet/intel/igc/igc_tsn.h
index f76bc86ddccd..1512307f5a52 100644
--- a/drivers/net/ethernet/intel/igc/igc_tsn.h
+++ b/drivers/net/ethernet/intel/igc/igc_tsn.h
@@ -5,5 +5,6 @@
#define _IGC_TSN_H_
int igc_tsn_offload_apply(struct igc_adapter *adapter);
+int igc_tsn_reset(struct igc_adapter *adapter);
#endif /* _IGC_BASE_H */
--
2.26.2
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