@@ -380,6 +380,10 @@ struct mana_port_context {
mana_handle_t port_handle;
mana_handle_t pf_filter_handle;
+ /* Mutex for sharing access to vport_use_count */
+ struct mutex vport_mutex;
+ int vport_use_count;
+
u16 port_idx;
bool port_is_up;
@@ -631,4 +635,7 @@ struct mana_tx_package {
struct gdma_posted_wqe_info wqe_info;
};
+int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id,
+ u32 doorbell_pg_id);
+void mana_uncfg_vport(struct mana_port_context *apc);
#endif /* _MANA_H */
@@ -646,13 +646,48 @@ static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index,
return 0;
}
-static int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id,
- u32 doorbell_pg_id)
+void mana_uncfg_vport(struct mana_port_context *apc)
+{
+ mutex_lock(&apc->vport_mutex);
+ apc->vport_use_count--;
+ WARN_ON(apc->vport_use_count < 0);
+ mutex_unlock(&apc->vport_mutex);
+}
+EXPORT_SYMBOL_NS(mana_uncfg_vport, NET_MANA);
+
+int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id,
+ u32 doorbell_pg_id)
{
struct mana_config_vport_resp resp = {};
struct mana_config_vport_req req = {};
int err;
+ /* This function is used to program the Ethernet port in the hardware
+ * table. It can be called from the Ethernet driver or the RDMA driver.
+ *
+ * For Ethernet usage, the hardware supports only one active user on a
+ * physical port. The driver checks on the port usage before programming
+ * the hardware when creating the RAW QP (RDMA driver) or exposing the
+ * device to kernel NET layer (Ethernet driver).
+ *
+ * Because the RDMA driver doesn't know in advance which QP type the
+ * user will create, it exposes the device with all its ports. The user
+ * may not be able to create RAW QP on a port if this port is already
+ * in used by the Ethernet driver from the kernel.
+ *
+ * This physical port limitation only applies to the RAW QP. For RC QP,
+ * the hardware doesn't have this limitation. The user can create RC
+ * QPs on a physical port up to the hardware limits independent of the
+ * Ethernet usage on the same port.
+ */
+ mutex_lock(&apc->vport_mutex);
+ if (apc->vport_use_count > 0) {
+ mutex_unlock(&apc->vport_mutex);
+ return -EBUSY;
+ }
+ apc->vport_use_count++;
+ mutex_unlock(&apc->vport_mutex);
+
mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX,
sizeof(req), sizeof(resp));
req.vport = apc->port_handle;
@@ -679,9 +714,16 @@ static int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id,
apc->tx_shortform_allowed = resp.short_form_allowed;
apc->tx_vp_offset = resp.tx_vport_offset;
+
+ netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n",
+ apc->port_handle, protection_dom_id, doorbell_pg_id);
out:
+ if (err)
+ mana_uncfg_vport(apc);
+
return err;
}
+EXPORT_SYMBOL_NS(mana_cfg_vport, NET_MANA);
static int mana_cfg_vport_steering(struct mana_port_context *apc,
enum TRI_STATE rx,
@@ -742,6 +784,9 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc,
resp.hdr.status);
err = -EPROTO;
}
+
+ netdev_info(ndev, "Configured steering vPort %llu entries %u\n",
+ apc->port_handle, num_entries);
out:
kfree(req);
return err;
@@ -1804,6 +1849,7 @@ static void mana_destroy_vport(struct mana_port_context *apc)
}
mana_destroy_txq(apc);
+ mana_uncfg_vport(apc);
if (gd->gdma_context->is_pf)
mana_pf_deregister_hw_vport(apc);
@@ -2076,6 +2122,9 @@ static int mana_probe_port(struct mana_context *ac, int port_idx,
apc->pf_filter_handle = INVALID_MANA_HANDLE;
apc->port_idx = port_idx;
+ mutex_init(&apc->vport_mutex);
+ apc->vport_use_count = 0;
+
ndev->netdev_ops = &mana_devops;
ndev->ethtool_ops = &mana_ethtool_ops;
ndev->mtu = ETH_DATA_LEN;