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igc: Simplify TSN flags handling

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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@intel.com>
Signed-off-by: Aravindhan Gunasekaran <aravindhan.gunasekaran@intel.com>
Signed-off-by: Mallikarjuna Chilakala <mallikarjuna.chilakala@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Vinicius Costa Gomes 2021-08-09 20:23:39 +05:30 committed by Tony Nguyen
parent c814a2d2d4
commit 61572d5f8f
4 changed files with 46 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/intel/igc/igc.h
View File

@ -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)

2
drivers/net/ethernet/intel/igc/igc_main.c
View File

@ -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);
}

71
drivers/net/ethernet/intel/igc/igc_tsn.c
View File

@ -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_reset(struct igc_adapter *adapter)
{
unsigned int new_flags;
int err = 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;
adapter->flags = new_flags;
return err;
}
int igc_tsn_offload_apply(struct igc_adapter *adapter)
{
bool is_any_enabled = adapter->base_time || is_any_launchtime(adapter);
if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED) && !is_any_enabled)
return 0;
if (!is_any_enabled) {
int err = igc_tsn_disable_offload(adapter);
if (err < 0)
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 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;
}

1
drivers/net/ethernet/intel/igc/igc_tsn.h
View File

@ -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 */