net: aquantia: add PTP rings infrastructure

[linux-2.6-block.git] / drivers / net / ethernet / aquantia / atlantic / aq_ring.c

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
index 76bdbe1596d62f10ce3e60ed0de1f1e2175dc435..8e84ff6eefe36a6fc591651cdccfa57cc3237562 100644 (file)
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * aQuantia Corporation Network Driver
- * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
+ * Copyright (C) 2014-2019 aQuantia Corporation. All rights reserved
  */
 
 /* File aq_ring.c: Definition of functions for Rx/Tx rings. */
@@ -177,6 +177,30 @@ err_exit:
        return self;
 }
 
+struct aq_ring_s *
+aq_ring_hwts_rx_alloc(struct aq_ring_s *self, struct aq_nic_s *aq_nic,
+                     unsigned int idx, unsigned int size, unsigned int dx_size)
+{
+       struct device *dev = aq_nic_get_dev(aq_nic);
+       size_t sz = size * dx_size + AQ_CFG_RXDS_DEF;
+
+       memset(self, 0, sizeof(*self));
+
+       self->aq_nic = aq_nic;
+       self->idx = idx;
+       self->size = size;
+       self->dx_size = dx_size;
+
+       self->dx_ring = dma_alloc_coherent(dev, sz, &self->dx_ring_pa,
+                                          GFP_KERNEL);
+       if (!self->dx_ring) {
+               aq_ring_free(self);
+               return NULL;
+       }
+
+       return self;
+}
+
 int aq_ring_init(struct aq_ring_s *self)
 {
        self->hw_head = 0;