enic: workaround A0 erratum
A0 revision ASIC has an erratum on the RQ desc cache on chip where the
cache can become corrupted causing pkt buf writes to wrong locations. The s/w
workaround is to post a dummy RQ desc in the ring every 32 descs, causing a
flush of the cache. A0 parts are not production, but there are enough of
these parts in the wild in test setups to warrant including workaround. A1
revision ASIC parts fix erratum.
Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/enic/vnic_dev.h b/drivers/net/enic/vnic_dev.h
index d960edb..db1d63e 100644
--- a/drivers/net/enic/vnic_dev.h
+++ b/drivers/net/enic/vnic_dev.h
@@ -41,6 +41,12 @@
}
#endif
+enum vnic_dev_hw_version {
+ VNIC_DEV_HW_VER_UNKNOWN,
+ VNIC_DEV_HW_VER_A1,
+ VNIC_DEV_HW_VER_A2,
+};
+
enum vnic_dev_intr_mode {
VNIC_DEV_INTR_MODE_UNKNOWN,
VNIC_DEV_INTR_MODE_INTX,
@@ -88,6 +94,8 @@
u64 *a0, u64 *a1, int wait);
int vnic_dev_fw_info(struct vnic_dev *vdev,
struct vnic_devcmd_fw_info **fw_info);
+int vnic_dev_hw_version(struct vnic_dev *vdev,
+ enum vnic_dev_hw_version *hw_ver);
int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
void *value);
int vnic_dev_stats_clear(struct vnic_dev *vdev);