sfc: Change priority and flags for automatic MAC filters
MAC filters inserted automatically by the driver, based on the device
address list (EF10) or no-match filters (Siena), should be overridable
at MANUAL or REQUIRED priority. Currently they themselves have
REQUIRED priority and this requires some odd special-casing.
We also can't reliably tell whether such a MAC filter has or has
not been overridden. We just remember that it is wanted by the
stack (RX_STACK flag).
Add another priority level, AUTO, between HINT and MANUAL, and
use this for the automatic filters while they have not been
overridden. Remove the RX_STACK flag. Add an RX_OVER_AUTO
flag which is set only when an AUTO filter has been overridden
(or was requested to be inserted while a higher-priority filter
existed).
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
diff --git a/drivers/net/ethernet/sfc/filter.h b/drivers/net/ethernet/sfc/filter.h
index 63c77a5..3ef298d 100644
--- a/drivers/net/ethernet/sfc/filter.h
+++ b/drivers/net/ethernet/sfc/filter.h
@@ -59,12 +59,16 @@
/**
* enum efx_filter_priority - priority of a hardware filter specification
* @EFX_FILTER_PRI_HINT: Performance hint
+ * @EFX_FILTER_PRI_AUTO: Automatic filter based on device address list
+ * or hardware requirements. This may only be used by the filter
+ * implementation for each NIC type.
* @EFX_FILTER_PRI_MANUAL: Manually configured filter
* @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level
* networking and SR-IOV)
*/
enum efx_filter_priority {
EFX_FILTER_PRI_HINT = 0,
+ EFX_FILTER_PRI_AUTO,
EFX_FILTER_PRI_MANUAL,
EFX_FILTER_PRI_REQUIRED,
};
@@ -78,19 +82,18 @@
* according to the indirection table.
* @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving
* queue.
- * @EFX_FILTER_FLAG_RX_STACK: Indicates a filter inserted for the
- * network stack. The filter must have a priority of
- * %EFX_FILTER_PRI_REQUIRED. It can be steered by a replacement
- * request with priority %EFX_FILTER_PRI_MANUAL, and a removal
- * request with priority %EFX_FILTER_PRI_MANUAL will reset the
- * steering (but not remove the filter).
+ * @EFX_FILTER_FLAG_RX_OVER_AUTO: Indicates a filter that is
+ * overriding an automatic filter (priority
+ * %EFX_FILTER_PRI_AUTO). This may only be set by the filter
+ * implementation for each type. A removal request will restore
+ * the automatic filter in its place.
* @EFX_FILTER_FLAG_RX: Filter is for RX
* @EFX_FILTER_FLAG_TX: Filter is for TX
*/
enum efx_filter_flags {
EFX_FILTER_FLAG_RX_RSS = 0x01,
EFX_FILTER_FLAG_RX_SCATTER = 0x02,
- EFX_FILTER_FLAG_RX_STACK = 0x04,
+ EFX_FILTER_FLAG_RX_OVER_AUTO = 0x04,
EFX_FILTER_FLAG_RX = 0x08,
EFX_FILTER_FLAG_TX = 0x10,
};