Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Millar:
 "Here are some highlights from the 2065 networking commits that
  happened this development cycle:

   1) XDP support for IXGBE (John Fastabend) and thunderx (Sunil Kowuri)

   2) Add a generic XDP driver, so that anyone can test XDP even if they
      lack a networking device whose driver has explicit XDP support
      (me).

   3) Sparc64 now has an eBPF JIT too (me)

   4) Add a BPF program testing framework via BPF_PROG_TEST_RUN (Alexei
      Starovoitov)

   5) Make netfitler network namespace teardown less expensive (Florian
      Westphal)

   6) Add symmetric hashing support to nft_hash (Laura Garcia Liebana)

   7) Implement NAPI and GRO in netvsc driver (Stephen Hemminger)

   8) Support TC flower offload statistics in mlxsw (Arkadi Sharshevsky)

   9) Multiqueue support in stmmac driver (Joao Pinto)

  10) Remove TCP timewait recycling, it never really could possibly work
      well in the real world and timestamp randomization really zaps any
      hint of usability this feature had (Soheil Hassas Yeganeh)

  11) Support level3 vs level4 ECMP route hashing in ipv4 (Nikolay
      Aleksandrov)

  12) Add socket busy poll support to epoll (Sridhar Samudrala)

  13) Netlink extended ACK support (Johannes Berg, Pablo Neira Ayuso,
      and several others)

  14) IPSEC hw offload infrastructure (Steffen Klassert)"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2065 commits)
  tipc: refactor function tipc_sk_recv_stream()
  tipc: refactor function tipc_sk_recvmsg()
  net: thunderx: Optimize page recycling for XDP
  net: thunderx: Support for XDP header adjustment
  net: thunderx: Add support for XDP_TX
  net: thunderx: Add support for XDP_DROP
  net: thunderx: Add basic XDP support
  net: thunderx: Cleanup receive buffer allocation
  net: thunderx: Optimize CQE_TX handling
  net: thunderx: Optimize RBDR descriptor handling
  net: thunderx: Support for page recycling
  ipx: call ipxitf_put() in ioctl error path
  net: sched: add helpers to handle extended actions
  qed*: Fix issues in the ptp filter config implementation.
  qede: Fix concurrency issue in PTP Tx path processing.
  stmmac: Add support for SIMATIC IOT2000 platform
  net: hns: fix ethtool_get_strings overflow in hns driver
  tcp: fix wraparound issue in tcp_lp
  bpf, arm64: fix jit branch offset related to ldimm64
  bpf, arm64: implement jiting of BPF_XADD
  ...

1 files changed, 564 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_client.c b/drivers/net/ethernet/intel/i40evf/i40evf_client.c
new file mode 100644
index 000000000000..ee737680a0e9
--- /dev/null
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_client.c
@@ -0,0 +1,564 @@
+#include <linux/list.h>
+#include <linux/errno.h>
+
+#include "i40evf.h"
+#include "i40e_prototype.h"
+#include "i40evf_client.h"
+
+static
+const char i40evf_client_interface_version_str[] = I40EVF_CLIENT_VERSION_STR;
+static struct i40e_client *vf_registered_client;
+static LIST_HEAD(i40evf_devices);
+static DEFINE_MUTEX(i40evf_device_mutex);
+
+static u32 i40evf_client_virtchnl_send(struct i40e_info *ldev,
+				       struct i40e_client *client,
+				       u8 *msg, u16 len);
+
+static int i40evf_client_setup_qvlist(struct i40e_info *ldev,
+				      struct i40e_client *client,
+				      struct i40e_qvlist_info *qvlist_info);
+
+static struct i40e_ops i40evf_lan_ops = {
+	.virtchnl_send = i40evf_client_virtchnl_send,
+	.setup_qvlist = i40evf_client_setup_qvlist,
+};
+
+/**
+ * i40evf_notify_client_message - call the client message receive callback
+ * @vsi: the VSI associated with this client
+ * @msg: message buffer
+ * @len: length of message
+ *
+ * If there is a client to this VSI, call the client
+ **/
+void i40evf_notify_client_message(struct i40e_vsi *vsi, u8 *msg, u16 len)
+{
+	struct i40e_client_instance *cinst;
+
+	if (!vsi)
+		return;
+
+	cinst = vsi->back->cinst;
+	if (!cinst || !cinst->client || !cinst->client->ops ||
+	    !cinst->client->ops->virtchnl_receive) {
+		dev_dbg(&vsi->back->pdev->dev,
+			"Cannot locate client instance virtchnl_receive function\n");
+		return;
+	}
+	cinst->client->ops->virtchnl_receive(&cinst->lan_info,  cinst->client,
+					     msg, len);
+}
+
+/**
+ * i40evf_notify_client_l2_params - call the client notify callback
+ * @vsi: the VSI with l2 param changes
+ *
+ * If there is a client to this VSI, call the client
+ **/
+void i40evf_notify_client_l2_params(struct i40e_vsi *vsi)
+{
+	struct i40e_client_instance *cinst;
+	struct i40e_params params;
+
+	if (!vsi)
+		return;
+
+	cinst = vsi->back->cinst;
+	memset(&params, 0, sizeof(params));
+	params.mtu = vsi->netdev->mtu;
+	params.link_up = vsi->back->link_up;
+	params.qos.prio_qos[0].qs_handle = vsi->qs_handle;
+
+	if (!cinst || !cinst->client || !cinst->client->ops ||
+	    !cinst->client->ops->l2_param_change) {
+		dev_dbg(&vsi->back->pdev->dev,
+			"Cannot locate client instance l2_param_change function\n");
+		return;
+	}
+	cinst->client->ops->l2_param_change(&cinst->lan_info, cinst->client,
+					    &params);
+}
+
+/**
+ * i40evf_notify_client_open - call the client open callback
+ * @vsi: the VSI with netdev opened
+ *
+ * If there is a client to this netdev, call the client with open
+ **/
+void i40evf_notify_client_open(struct i40e_vsi *vsi)
+{
+	struct i40evf_adapter *adapter = vsi->back;
+	struct i40e_client_instance *cinst = adapter->cinst;
+	int ret;
+
+	if (!cinst || !cinst->client || !cinst->client->ops ||
+	    !cinst->client->ops->open) {
+		dev_dbg(&vsi->back->pdev->dev,
+			"Cannot locate client instance open function\n");
+		return;
+	}
+	if (!(test_bit(__I40E_CLIENT_INSTANCE_OPENED, &cinst->state))) {
+		ret = cinst->client->ops->open(&cinst->lan_info, cinst->client);
+		if (!ret)
+			set_bit(__I40E_CLIENT_INSTANCE_OPENED, &cinst->state);
+	}
+}
+
+/**
+ * i40evf_client_release_qvlist - send a message to the PF to release iwarp qv map
+ * @ldev: pointer to L2 context.
+ *
+ * Return 0 on success or < 0 on error
+ **/
+static int i40evf_client_release_qvlist(struct i40e_info *ldev)
+{
+	struct i40evf_adapter *adapter = ldev->vf;
+	i40e_status err;
+
+	if (adapter->aq_required)
+		return -EAGAIN;
+
+	err = i40e_aq_send_msg_to_pf(&adapter->hw,
+			I40E_VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP,
+			I40E_SUCCESS, NULL, 0, NULL);
+
+	if (err)
+		dev_err(&adapter->pdev->dev,
+			"Unable to send iWarp vector release message to PF, error %d, aq status %d\n",
+			err, adapter->hw.aq.asq_last_status);
+
+	return err;
+}
+
+/**
+ * i40evf_notify_client_close - call the client close callback
+ * @vsi: the VSI with netdev closed
+ * @reset: true when close called due to reset pending
+ *
+ * If there is a client to this netdev, call the client with close
+ **/
+void i40evf_notify_client_close(struct i40e_vsi *vsi, bool reset)
+{
+	struct i40evf_adapter *adapter = vsi->back;
+	struct i40e_client_instance *cinst = adapter->cinst;
+
+	if (!cinst || !cinst->client || !cinst->client->ops ||
+	    !cinst->client->ops->close) {
+		dev_dbg(&vsi->back->pdev->dev,
+			"Cannot locate client instance close function\n");
+		return;
+	}
+	cinst->client->ops->close(&cinst->lan_info, cinst->client, reset);
+	i40evf_client_release_qvlist(&cinst->lan_info);
+	clear_bit(__I40E_CLIENT_INSTANCE_OPENED, &cinst->state);
+}
+
+/**
+ * i40evf_client_add_instance - add a client instance to the instance list
+ * @adapter: pointer to the board struct
+ * @client: pointer to a client struct in the client list.
+ *
+ * Returns cinst ptr on success, NULL on failure
+ **/
+static struct i40e_client_instance *
+i40evf_client_add_instance(struct i40evf_adapter *adapter)
+{
+	struct i40e_client_instance *cinst = NULL;
+	struct netdev_hw_addr *mac = NULL;
+	struct i40e_vsi *vsi = &adapter->vsi;
+	int i;
+
+	if (!vf_registered_client)
+		goto out;
+
+	if (adapter->cinst) {
+		cinst = adapter->cinst;
+		goto out;
+	}
+
+	cinst = kzalloc(sizeof(*cinst), GFP_KERNEL);
+	if (!cinst)
+		goto out;
+
+	cinst->lan_info.vf = (void *)adapter;
+	cinst->lan_info.netdev = vsi->netdev;
+	cinst->lan_info.pcidev = adapter->pdev;
+	cinst->lan_info.fid = 0;
+	cinst->lan_info.ftype = I40E_CLIENT_FTYPE_VF;
+	cinst->lan_info.hw_addr = adapter->hw.hw_addr;
+	cinst->lan_info.ops = &i40evf_lan_ops;
+	cinst->lan_info.version.major = I40EVF_CLIENT_VERSION_MAJOR;
+	cinst->lan_info.version.minor = I40EVF_CLIENT_VERSION_MINOR;
+	cinst->lan_info.version.build = I40EVF_CLIENT_VERSION_BUILD;
+	set_bit(__I40E_CLIENT_INSTANCE_NONE, &cinst->state);
+
+	cinst->lan_info.msix_count = adapter->num_iwarp_msix;
+	cinst->lan_info.msix_entries =
+			&adapter->msix_entries[adapter->iwarp_base_vector];
+
+	for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
+		cinst->lan_info.params.qos.prio_qos[i].tc = 0;
+		cinst->lan_info.params.qos.prio_qos[i].qs_handle =
+								vsi->qs_handle;
+	}
+
+	mac = list_first_entry(&cinst->lan_info.netdev->dev_addrs.list,
+			       struct netdev_hw_addr, list);
+	if (mac)
+		ether_addr_copy(cinst->lan_info.lanmac, mac->addr);
+	else
+		dev_err(&adapter->pdev->dev, "MAC address list is empty!\n");
+
+	cinst->client = vf_registered_client;
+	adapter->cinst = cinst;
+out:
+	return cinst;
+}
+
+/**
+ * i40evf_client_del_instance - removes a client instance from the list
+ * @adapter: pointer to the board struct
+ * @client: pointer to the client struct
+ *
+ **/
+static
+void i40evf_client_del_instance(struct i40evf_adapter *adapter)
+{
+	kfree(adapter->cinst);
+	adapter->cinst = NULL;
+}
+
+/**
+ * i40evf_client_subtask - client maintenance work
+ * @adapter: board private structure
+ **/
+void i40evf_client_subtask(struct i40evf_adapter *adapter)
+{
+	struct i40e_client *client = vf_registered_client;
+	struct i40e_client_instance *cinst;
+	int ret = 0;
+
+	if (adapter->state < __I40EVF_DOWN)
+		return;
+
+	/* first check client is registered */
+	if (!client)
+		return;
+
+	/* Add the client instance to the instance list */
+	cinst = i40evf_client_add_instance(adapter);
+	if (!cinst)
+		return;
+
+	dev_info(&adapter->pdev->dev, "Added instance of Client %s\n",
+		 client->name);
+
+	if (!test_bit(__I40E_CLIENT_INSTANCE_OPENED, &cinst->state)) {
+		/* Send an Open request to the client */
+
+		if (client->ops && client->ops->open)
+			ret = client->ops->open(&cinst->lan_info, client);
+		if (!ret)
+			set_bit(__I40E_CLIENT_INSTANCE_OPENED,
+				&cinst->state);
+		else
+			/* remove client instance */
+			i40evf_client_del_instance(adapter);
+	}
+}
+
+/**
+ * i40evf_lan_add_device - add a lan device struct to the list of lan devices
+ * @adapter: pointer to the board struct
+ *
+ * Returns 0 on success or none 0 on error
+ **/
+int i40evf_lan_add_device(struct i40evf_adapter *adapter)
+{
+	struct i40e_device *ldev;
+	int ret = 0;
+
+	mutex_lock(&i40evf_device_mutex);
+	list_for_each_entry(ldev, &i40evf_devices, list) {
+		if (ldev->vf == adapter) {
+			ret = -EEXIST;
+			goto out;
+		}
+	}
+	ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
+	if (!ldev) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	ldev->vf = adapter;
+	INIT_LIST_HEAD(&ldev->list);
+	list_add(&ldev->list, &i40evf_devices);
+	dev_info(&adapter->pdev->dev, "Added LAN device bus=0x%02x dev=0x%02x func=0x%02x\n",
+		 adapter->hw.bus.bus_id, adapter->hw.bus.device,
+		 adapter->hw.bus.func);
+
+	/* Since in some cases register may have happened before a device gets
+	 * added, we can schedule a subtask to go initiate the clients.
+	 */
+	adapter->flags |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
+
+out:
+	mutex_unlock(&i40evf_device_mutex);
+	return ret;
+}
+
+/**
+ * i40evf_lan_del_device - removes a lan device from the device list
+ * @adapter: pointer to the board struct
+ *
+ * Returns 0 on success or non-0 on error
+ **/
+int i40evf_lan_del_device(struct i40evf_adapter *adapter)
+{
+	struct i40e_device *ldev, *tmp;
+	int ret = -ENODEV;
+
+	mutex_lock(&i40evf_device_mutex);
+	list_for_each_entry_safe(ldev, tmp, &i40evf_devices, list) {
+		if (ldev->vf == adapter) {
+			dev_info(&adapter->pdev->dev,
+				 "Deleted LAN device bus=0x%02x dev=0x%02x func=0x%02x\n",
+				 adapter->hw.bus.bus_id, adapter->hw.bus.device,
+				 adapter->hw.bus.func);
+			list_del(&ldev->list);
+			kfree(ldev);
+			ret = 0;
+			break;
+		}
+	}
+
+	mutex_unlock(&i40evf_device_mutex);
+	return ret;
+}
+
+/**
+ * i40evf_client_release - release client specific resources
+ * @client: pointer to the registered client
+ *
+ **/
+static void i40evf_client_release(struct i40e_client *client)
+{
+	struct i40e_client_instance *cinst;
+	struct i40e_device *ldev;
+	struct i40evf_adapter *adapter;
+
+	mutex_lock(&i40evf_device_mutex);
+	list_for_each_entry(ldev, &i40evf_devices, list) {
+		adapter = ldev->vf;
+		cinst = adapter->cinst;
+		if (!cinst)
+			continue;
+		if (test_bit(__I40E_CLIENT_INSTANCE_OPENED, &cinst->state)) {
+			if (client->ops && client->ops->close)
+				client->ops->close(&cinst->lan_info, client,
+						   false);
+			i40evf_client_release_qvlist(&cinst->lan_info);
+			clear_bit(__I40E_CLIENT_INSTANCE_OPENED, &cinst->state);
+
+			dev_warn(&adapter->pdev->dev,
+				 "Client %s instance closed\n", client->name);
+		}
+		/* delete the client instance */
+		i40evf_client_del_instance(adapter);
+		dev_info(&adapter->pdev->dev, "Deleted client instance of Client %s\n",
+			 client->name);
+	}
+	mutex_unlock(&i40evf_device_mutex);
+}
+
+/**
+ * i40evf_client_prepare - prepare client specific resources
+ * @client: pointer to the registered client
+ *
+ **/
+static void i40evf_client_prepare(struct i40e_client *client)
+{
+	struct i40e_device *ldev;
+	struct i40evf_adapter *adapter;
+
+	mutex_lock(&i40evf_device_mutex);
+	list_for_each_entry(ldev, &i40evf_devices, list) {
+		adapter = ldev->vf;
+		/* Signal the watchdog to service the client */
+		adapter->flags |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
+	}
+	mutex_unlock(&i40evf_device_mutex);
+}
+
+/**
+ * i40evf_client_virtchnl_send - send a message to the PF instance
+ * @ldev: pointer to L2 context.
+ * @client: Client pointer.
+ * @msg: pointer to message buffer
+ * @len: message length
+ *
+ * Return 0 on success or < 0 on error
+ **/
+static u32 i40evf_client_virtchnl_send(struct i40e_info *ldev,
+				       struct i40e_client *client,
+				       u8 *msg, u16 len)
+{
+	struct i40evf_adapter *adapter = ldev->vf;
+	i40e_status err;
+
+	if (adapter->aq_required)
+		return -EAGAIN;
+
+	err = i40e_aq_send_msg_to_pf(&adapter->hw, I40E_VIRTCHNL_OP_IWARP,
+				     I40E_SUCCESS, msg, len, NULL);
+	if (err)
+		dev_err(&adapter->pdev->dev, "Unable to send iWarp message to PF, error %d, aq status %d\n",
+			err, adapter->hw.aq.asq_last_status);
+
+	return err;
+}
+
+/**
+ * i40evf_client_setup_qvlist - send a message to the PF to setup iwarp qv map
+ * @ldev: pointer to L2 context.
+ * @client: Client pointer.
+ * @qv_info: queue and vector list
+ *
+ * Return 0 on success or < 0 on error
+ **/
+static int i40evf_client_setup_qvlist(struct i40e_info *ldev,
+				      struct i40e_client *client,
+				      struct i40e_qvlist_info *qvlist_info)
+{
+	struct i40e_virtchnl_iwarp_qvlist_info *v_qvlist_info;
+	struct i40evf_adapter *adapter = ldev->vf;
+	struct i40e_qv_info *qv_info;
+	i40e_status err;
+	u32 v_idx, i;
+	u32 msg_size;
+
+	if (adapter->aq_required)
+		return -EAGAIN;
+
+	/* A quick check on whether the vectors belong to the client */
+	for (i = 0; i < qvlist_info->num_vectors; i++) {
+		qv_info = &qvlist_info->qv_info[i];
+		if (!qv_info)
+			continue;
+		v_idx = qv_info->v_idx;
+		if ((v_idx >=
+		    (adapter->iwarp_base_vector + adapter->num_iwarp_msix)) ||
+		    (v_idx < adapter->iwarp_base_vector))
+			return -EINVAL;
+	}
+
+	v_qvlist_info = (struct i40e_virtchnl_iwarp_qvlist_info *)qvlist_info;
+	msg_size = sizeof(struct i40e_virtchnl_iwarp_qvlist_info) +
+			(sizeof(struct i40e_virtchnl_iwarp_qv_info) *
+			(v_qvlist_info->num_vectors - 1));
+
+	adapter->client_pending |= BIT(I40E_VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP);
+	err = i40e_aq_send_msg_to_pf(&adapter->hw,
+			I40E_VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP,
+			I40E_SUCCESS, (u8 *)v_qvlist_info, msg_size, NULL);
+
+	if (err) {
+		dev_err(&adapter->pdev->dev,
+			"Unable to send iWarp vector config message to PF, error %d, aq status %d\n",
+			err, adapter->hw.aq.asq_last_status);
+		goto out;
+	}
+
+	err = -EBUSY;
+	for (i = 0; i < 5; i++) {
+		msleep(100);
+		if (!(adapter->client_pending &
+		      BIT(I40E_VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP))) {
+			err = 0;
+			break;
+		}
+	}
+out:
+	return err;
+}
+
+/**
+ * i40evf_register_client - Register a i40e client driver with the L2 driver
+ * @client: pointer to the i40e_client struct
+ *
+ * Returns 0 on success or non-0 on error
+ **/
+int i40evf_register_client(struct i40e_client *client)
+{
+	int ret = 0;
+
+	if (!client) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (strlen(client->name) == 0) {
+		pr_info("i40evf: Failed to register client with no name\n");
+		ret = -EIO;
+		goto out;
+	}
+
+	if (vf_registered_client) {
+		pr_info("i40evf: Client %s has already been registered!\n",
+			client->name);
+		ret = -EEXIST;
+		goto out;
+	}
+
+	if ((client->version.major != I40EVF_CLIENT_VERSION_MAJOR) ||
+	    (client->version.minor != I40EVF_CLIENT_VERSION_MINOR)) {
+		pr_info("i40evf: Failed to register client %s due to mismatched client interface version\n",
+			client->name);
+		pr_info("Client is using version: %02d.%02d.%02d while LAN driver supports %s\n",
+			client->version.major, client->version.minor,
+			client->version.build,
+			i40evf_client_interface_version_str);
+		ret = -EIO;
+		goto out;
+	}
+
+	vf_registered_client = client;
+
+	i40evf_client_prepare(client);
+
+	pr_info("i40evf: Registered client %s with return code %d\n",
+		client->name, ret);
+out:
+	return ret;
+}
+EXPORT_SYMBOL(i40evf_register_client);
+
+/**
+ * i40evf_unregister_client - Unregister a i40e client driver with the L2 driver
+ * @client: pointer to the i40e_client struct
+ *
+ * Returns 0 on success or non-0 on error
+ **/
+int i40evf_unregister_client(struct i40e_client *client)
+{
+	int ret = 0;
+
+	/* When a unregister request comes through we would have to send
+	 * a close for each of the client instances that were opened.
+	 * client_release function is called to handle this.
+	 */
+	i40evf_client_release(client);
+
+	if (vf_registered_client != client) {
+		pr_info("i40evf: Client %s has not been registered\n",
+			client->name);
+		ret = -ENODEV;
+		goto out;
+	}
+	vf_registered_client = NULL;
+	pr_info("i40evf: Unregistered client %s\n", client->name);
+out:
+	return ret;
+}
+EXPORT_SYMBOL(i40evf_unregister_client);