1 files changed, 399 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/abm/main.c b/drivers/net/ethernet/netronome/nfp/abm/main.c
new file mode 100644
index 000000000000..5a12bb20bced
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/abm/main.c
@@ -0,0 +1,399 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+/*
+ * Copyright (C) 2018 Netronome Systems, Inc.
+ *
+ * This software is dual licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree or the BSD 2-Clause License provided below.  You have the
+ * option to license this software under the complete terms of either license.
+ *
+ * The BSD 2-Clause License:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      1. Redistributions of source code must retain the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer.
+ *
+ *      2. Redistributions in binary form must reproduce the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer in the documentation and/or other materials
+ *         provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/etherdevice.h>
+#include <linux/lockdep.h>
+#include <linux/netdevice.h>
+#include <linux/rcupdate.h>
+#include <linux/slab.h>
+
+#include "../nfpcore/nfp.h"
+#include "../nfpcore/nfp_cpp.h"
+#include "../nfpcore/nfp_nsp.h"
+#include "../nfp_app.h"
+#include "../nfp_main.h"
+#include "../nfp_net.h"
+#include "../nfp_net_repr.h"
+#include "../nfp_port.h"
+#include "main.h"
+
+static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id)
+{
+	return FIELD_PREP(NFP_ABM_PORTID_TYPE, rtype) |
+	       FIELD_PREP(NFP_ABM_PORTID_ID, id);
+}
+
+static struct net_device *nfp_abm_repr_get(struct nfp_app *app, u32 port_id)
+{
+	enum nfp_repr_type rtype;
+	struct nfp_reprs *reprs;
+	u8 port;
+
+	rtype = FIELD_GET(NFP_ABM_PORTID_TYPE, port_id);
+	port = FIELD_GET(NFP_ABM_PORTID_ID, port_id);
+
+	reprs = rcu_dereference(app->reprs[rtype]);
+	if (!reprs)
+		return NULL;
+
+	if (port >= reprs->num_reprs)
+		return NULL;
+
+	return rcu_dereference(reprs->reprs[port]);
+}
+
+static int
+nfp_abm_spawn_repr(struct nfp_app *app, struct nfp_abm_link *alink,
+		   enum nfp_port_type ptype)
+{
+	struct net_device *netdev;
+	enum nfp_repr_type rtype;
+	struct nfp_reprs *reprs;
+	struct nfp_repr *repr;
+	struct nfp_port *port;
+	int err;
+
+	if (ptype == NFP_PORT_PHYS_PORT)
+		rtype = NFP_REPR_TYPE_PHYS_PORT;
+	else
+		rtype = NFP_REPR_TYPE_PF;
+
+	netdev = nfp_repr_alloc(app);
+	if (!netdev)
+		return -ENOMEM;
+	repr = netdev_priv(netdev);
+	repr->app_priv = alink;
+
+	port = nfp_port_alloc(app, ptype, netdev);
+	if (IS_ERR(port)) {
+		err = PTR_ERR(port);
+		goto err_free_repr;
+	}
+
+	if (ptype == NFP_PORT_PHYS_PORT) {
+		port->eth_forced = true;
+		err = nfp_port_init_phy_port(app->pf, app, port, alink->id);
+		if (err)
+			goto err_free_port;
+	} else {
+		port->pf_id = alink->abm->pf_id;
+		port->pf_split = app->pf->max_data_vnics > 1;
+		port->pf_split_id = alink->id;
+		port->vnic = alink->vnic->dp.ctrl_bar;
+	}
+
+	SET_NETDEV_DEV(netdev, &alink->vnic->pdev->dev);
+	eth_hw_addr_random(netdev);
+
+	err = nfp_repr_init(app, netdev, nfp_abm_portid(rtype, alink->id),
+			    port, alink->vnic->dp.netdev);
+	if (err)
+		goto err_free_port;
+
+	reprs = nfp_reprs_get_locked(app, rtype);
+	WARN(nfp_repr_get_locked(app, reprs, alink->id), "duplicate repr");
+	rcu_assign_pointer(reprs->reprs[alink->id], netdev);
+
+	nfp_info(app->cpp, "%s Port %d Representor(%s) created\n",
+		 ptype == NFP_PORT_PF_PORT ? "PCIe" : "Phys",
+		 alink->id, netdev->name);
+
+	return 0;
+
+err_free_port:
+	nfp_port_free(port);
+err_free_repr:
+	nfp_repr_free(netdev);
+	return err;
+}
+
+static void
+nfp_abm_kill_repr(struct nfp_app *app, struct nfp_abm_link *alink,
+		  enum nfp_repr_type rtype)
+{
+	struct net_device *netdev;
+	struct nfp_reprs *reprs;
+
+	reprs = nfp_reprs_get_locked(app, rtype);
+	netdev = nfp_repr_get_locked(app, reprs, alink->id);
+	if (!netdev)
+		return;
+	rcu_assign_pointer(reprs->reprs[alink->id], NULL);
+	synchronize_rcu();
+	/* Cast to make sure nfp_repr_clean_and_free() takes a nfp_repr */
+	nfp_repr_clean_and_free((struct nfp_repr *)netdev_priv(netdev));
+}
+
+static void
+nfp_abm_kill_reprs(struct nfp_abm *abm, struct nfp_abm_link *alink)
+{
+	nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PF);
+	nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PHYS_PORT);
+}
+
+static void nfp_abm_kill_reprs_all(struct nfp_abm *abm)
+{
+	struct nfp_pf *pf = abm->app->pf;
+	struct nfp_net *nn;
+
+	list_for_each_entry(nn, &pf->vnics, vnic_list)
+		nfp_abm_kill_reprs(abm, (struct nfp_abm_link *)nn->app_priv);
+}
+
+static enum devlink_eswitch_mode nfp_abm_eswitch_mode_get(struct nfp_app *app)
+{
+	struct nfp_abm *abm = app->priv;
+
+	return abm->eswitch_mode;
+}
+
+static int nfp_abm_eswitch_set_legacy(struct nfp_abm *abm)
+{
+	nfp_abm_kill_reprs_all(abm);
+
+	abm->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
+	return 0;
+}
+
+static void nfp_abm_eswitch_clean_up(struct nfp_abm *abm)
+{
+	if (abm->eswitch_mode != DEVLINK_ESWITCH_MODE_LEGACY)
+		WARN_ON(nfp_abm_eswitch_set_legacy(abm));
+}
+
+static int nfp_abm_eswitch_set_switchdev(struct nfp_abm *abm)
+{
+	struct nfp_app *app = abm->app;
+	struct nfp_pf *pf = app->pf;
+	struct nfp_net *nn;
+	int err;
+
+	list_for_each_entry(nn, &pf->vnics, vnic_list) {
+		struct nfp_abm_link *alink = nn->app_priv;
+
+		err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PHYS_PORT);
+		if (err)
+			goto err_kill_all_reprs;
+
+		err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PF_PORT);
+		if (err)
+			goto err_kill_all_reprs;
+	}
+
+	abm->eswitch_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
+	return 0;
+
+err_kill_all_reprs:
+	nfp_abm_kill_reprs_all(abm);
+	return err;
+}
+
+static int nfp_abm_eswitch_mode_set(struct nfp_app *app, u16 mode)
+{
+	struct nfp_abm *abm = app->priv;
+
+	if (abm->eswitch_mode == mode)
+		return 0;
+
+	switch (mode) {
+	case DEVLINK_ESWITCH_MODE_LEGACY:
+		return nfp_abm_eswitch_set_legacy(abm);
+	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
+		return nfp_abm_eswitch_set_switchdev(abm);
+	default:
+		return -EINVAL;
+	}
+}
+
+static void
+nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm *abm, struct nfp_net *nn,
+		     unsigned int id)
+{
+	struct nfp_eth_table_port *eth_port = &pf->eth_tbl->ports[id];
+	u8 mac_addr[ETH_ALEN];
+	const char *mac_str;
+	char name[32];
+
+	if (id > pf->eth_tbl->count) {
+		nfp_warn(pf->cpp, "No entry for persistent MAC address\n");
+		eth_hw_addr_random(nn->dp.netdev);
+		return;
+	}
+
+	snprintf(name, sizeof(name), "eth%u.mac.pf%u",
+		 eth_port->eth_index, abm->pf_id);
+
+	mac_str = nfp_hwinfo_lookup(pf->hwinfo, name);
+	if (!mac_str) {
+		nfp_warn(pf->cpp, "Can't lookup persistent MAC address (%s)\n",
+			 name);
+		eth_hw_addr_random(nn->dp.netdev);
+		return;
+	}
+
+	if (sscanf(mac_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+		   &mac_addr[0], &mac_addr[1], &mac_addr[2],
+		   &mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) {
+		nfp_warn(pf->cpp, "Can't parse persistent MAC address (%s)\n",
+			 mac_str);
+		eth_hw_addr_random(nn->dp.netdev);
+		return;
+	}
+
+	ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
+	ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
+}
+
+static int
+nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
+{
+	struct nfp_eth_table_port *eth_port = &app->pf->eth_tbl->ports[id];
+	struct nfp_abm *abm = app->priv;
+	struct nfp_abm_link *alink;
+	int err;
+
+	alink = kzalloc(sizeof(*alink), GFP_KERNEL);
+	if (!alink)
+		return -ENOMEM;
+	nn->app_priv = alink;
+	alink->abm = abm;
+	alink->vnic = nn;
+	alink->id = id;
+
+	/* This is a multi-host app, make sure MAC/PHY is up, but don't
+	 * make the MAC/PHY state follow the state of any of the ports.
+	 */
+	err = nfp_eth_set_configured(app->cpp, eth_port->index, true);
+	if (err < 0)
+		goto err_free_alink;
+
+	netif_keep_dst(nn->dp.netdev);
+
+	nfp_abm_vnic_set_mac(app->pf, abm, nn, id);
+	nfp_abm_ctrl_read_params(alink);
+
+	return 0;
+
+err_free_alink:
+	kfree(alink);
+	return err;
+}
+
+static void nfp_abm_vnic_free(struct nfp_app *app, struct nfp_net *nn)
+{
+	struct nfp_abm_link *alink = nn->app_priv;
+
+	nfp_abm_kill_reprs(alink->abm, alink);
+	kfree(alink);
+}
+
+static int nfp_abm_init(struct nfp_app *app)
+{
+	struct nfp_pf *pf = app->pf;
+	struct nfp_reprs *reprs;
+	struct nfp_abm *abm;
+	int err;
+
+	if (!pf->eth_tbl) {
+		nfp_err(pf->cpp, "ABM NIC requires ETH table\n");
+		return -EINVAL;
+	}
+	if (pf->max_data_vnics != pf->eth_tbl->count) {
+		nfp_err(pf->cpp, "ETH entries don't match vNICs (%d vs %d)\n",
+			pf->max_data_vnics, pf->eth_tbl->count);
+		return -EINVAL;
+	}
+	if (!pf->mac_stats_bar) {
+		nfp_warn(app->cpp, "ABM NIC requires mac_stats symbol\n");
+		return -EINVAL;
+	}
+
+	abm = kzalloc(sizeof(*abm), GFP_KERNEL);
+	if (!abm)
+		return -ENOMEM;
+	app->priv = abm;
+	abm->app = app;
+
+	err = nfp_abm_ctrl_find_addrs(abm);
+	if (err)
+		goto err_free_abm;
+
+	err = -ENOMEM;
+	reprs = nfp_reprs_alloc(pf->max_data_vnics);
+	if (!reprs)
+		goto err_free_abm;
+	RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PHYS_PORT], reprs);
+
+	reprs = nfp_reprs_alloc(pf->max_data_vnics);
+	if (!reprs)
+		goto err_free_phys;
+	RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PF], reprs);
+
+	return 0;
+
+err_free_phys:
+	nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
+err_free_abm:
+	kfree(abm);
+	app->priv = NULL;
+	return err;
+}
+
+static void nfp_abm_clean(struct nfp_app *app)
+{
+	struct nfp_abm *abm = app->priv;
+
+	nfp_abm_eswitch_clean_up(abm);
+	nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PF);
+	nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
+	kfree(abm);
+	app->priv = NULL;
+}
+
+const struct nfp_app_type app_abm = {
+	.id		= NFP_APP_ACTIVE_BUFFER_MGMT_NIC,
+	.name		= "abm",
+
+	.init		= nfp_abm_init,
+	.clean		= nfp_abm_clean,
+
+	.vnic_alloc	= nfp_abm_vnic_alloc,
+	.vnic_free	= nfp_abm_vnic_free,
+
+	.eswitch_mode_get	= nfp_abm_eswitch_mode_get,
+	.eswitch_mode_set	= nfp_abm_eswitch_mode_set,
+
+	.repr_get	= nfp_abm_repr_get,
+};