netdevsim: rename devlink.c to dev.c to contain per-dev(asic) items

The existing devlink.c code is going to be extended to represent asic
device on a bus. As this is about more than just devlink,
rename the file. Do appropriate prefix renaming alongside with that.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 241 insertions, 0 deletions

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
new file mode 100644
index 000000000000..c87f0abfaff7
--- /dev/null
+++ b/drivers/net/netdevsim/dev.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2018 Cumulus Networks. All rights reserved.
+ * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
+ * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
+ *
+ * This software is 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.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/device.h>
+#include <linux/rtnetlink.h>
+#include <net/devlink.h>
+
+#include "netdevsim.h"
+
+struct nsim_dev {
+	struct nsim_fib_data *fib_data;
+};
+
+static u64 nsim_dev_ipv4_fib_resource_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV4_FIB, false);
+}
+
+static u64 nsim_dev_ipv4_fib_rules_res_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV4_FIB_RULES, false);
+}
+
+static u64 nsim_dev_ipv6_fib_resource_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV6_FIB, false);
+}
+
+static u64 nsim_dev_ipv6_fib_rules_res_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV6_FIB_RULES, false);
+}
+
+static int nsim_dev_resources_register(struct devlink *devlink)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+	struct devlink_resource_size_params params = {
+		.size_max = (u64)-1,
+		.size_granularity = 1,
+		.unit = DEVLINK_RESOURCE_UNIT_ENTRY
+	};
+	int err;
+	u64 n;
+
+	/* Resources for IPv4 */
+	err = devlink_resource_register(devlink, "IPv4", (u64)-1,
+					NSIM_RESOURCE_IPV4,
+					DEVLINK_RESOURCE_ID_PARENT_TOP,
+					&params);
+	if (err) {
+		pr_err("Failed to register IPv4 top resource\n");
+		goto out;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV4_FIB, true);
+	err = devlink_resource_register(devlink, "fib", n,
+					NSIM_RESOURCE_IPV4_FIB,
+					NSIM_RESOURCE_IPV4, &params);
+	if (err) {
+		pr_err("Failed to register IPv4 FIB resource\n");
+		return err;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV4_FIB_RULES, true);
+	err = devlink_resource_register(devlink, "fib-rules", n,
+					NSIM_RESOURCE_IPV4_FIB_RULES,
+					NSIM_RESOURCE_IPV4, &params);
+	if (err) {
+		pr_err("Failed to register IPv4 FIB rules resource\n");
+		return err;
+	}
+
+	/* Resources for IPv6 */
+	err = devlink_resource_register(devlink, "IPv6", (u64)-1,
+					NSIM_RESOURCE_IPV6,
+					DEVLINK_RESOURCE_ID_PARENT_TOP,
+					&params);
+	if (err) {
+		pr_err("Failed to register IPv6 top resource\n");
+		goto out;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV6_FIB, true);
+	err = devlink_resource_register(devlink, "fib", n,
+					NSIM_RESOURCE_IPV6_FIB,
+					NSIM_RESOURCE_IPV6, &params);
+	if (err) {
+		pr_err("Failed to register IPv6 FIB resource\n");
+		return err;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV6_FIB_RULES, true);
+	err = devlink_resource_register(devlink, "fib-rules", n,
+					NSIM_RESOURCE_IPV6_FIB_RULES,
+					NSIM_RESOURCE_IPV6, &params);
+	if (err) {
+		pr_err("Failed to register IPv6 FIB rules resource\n");
+		return err;
+	}
+
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV4_FIB,
+					  nsim_dev_ipv4_fib_resource_occ_get,
+					  nsim_dev);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV4_FIB_RULES,
+					  nsim_dev_ipv4_fib_rules_res_occ_get,
+					  nsim_dev);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV6_FIB,
+					  nsim_dev_ipv6_fib_resource_occ_get,
+					  nsim_dev);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV6_FIB_RULES,
+					  nsim_dev_ipv6_fib_rules_res_occ_get,
+					  nsim_dev);
+out:
+	return err;
+}
+
+static int nsim_dev_reload(struct devlink *devlink,
+			   struct netlink_ext_ack *extack)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+	enum nsim_resource_id res_ids[] = {
+		NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES,
+		NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES
+	};
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(res_ids); ++i) {
+		int err;
+		u64 val;
+
+		err = devlink_resource_size_get(devlink, res_ids[i], &val);
+		if (!err) {
+			err = nsim_fib_set_max(nsim_dev->fib_data,
+					       res_ids[i], val, extack);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
+static const struct devlink_ops nsim_dev_devlink_ops = {
+	.reload = nsim_dev_reload,
+};
+
+static int __nsim_dev_init(struct netdevsim *ns)
+{
+	struct nsim_dev *nsim_dev;
+	struct devlink *devlink;
+	int err;
+
+	devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
+	if (!devlink)
+		return -ENOMEM;
+	nsim_dev = devlink_priv(devlink);
+
+	nsim_dev->fib_data = nsim_fib_create();
+	if (IS_ERR(nsim_dev->fib_data)) {
+		err = PTR_ERR(nsim_dev->fib_data);
+		goto err_devlink_free;
+	}
+
+	err = nsim_dev_resources_register(devlink);
+	if (err)
+		goto err_fib_destroy;
+
+	err = devlink_register(devlink, &ns->dev);
+	if (err)
+		goto err_resources_unregister;
+
+	ns->devlink = devlink;
+
+	return 0;
+
+err_resources_unregister:
+	devlink_resources_unregister(devlink, NULL);
+err_fib_destroy:
+	nsim_fib_destroy(nsim_dev->fib_data);
+err_devlink_free:
+	devlink_free(devlink);
+
+	return err;
+}
+
+int nsim_dev_init(struct netdevsim *ns)
+{
+	int err;
+
+	dev_hold(ns->netdev);
+	rtnl_unlock();
+	err = __nsim_dev_init(ns);
+	rtnl_lock();
+	dev_put(ns->netdev);
+	return err;
+}
+
+void nsim_dev_exit(struct netdevsim *ns)
+{
+	struct devlink *devlink = ns->devlink;
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+
+	devlink_unregister(devlink);
+	devlink_resources_unregister(devlink, NULL);
+	nsim_fib_destroy(nsim_dev->fib_data);
+	devlink_free(devlink);
+}