Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 435 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c
new file mode 100644
index 0000000000..d8f4d00ad2
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c
@@ -0,0 +1,435 @@
+/*
+ * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - 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/cpumask.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+
+#include <linux/mlx4/driver.h>
+#include <linux/mlx4/device.h>
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4_en.h"
+
+MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");
+MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRV_VERSION);
+
+static const char mlx4_en_version[] =
+	DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
+	DRV_VERSION "\n";
+
+#define MLX4_EN_PARM_INT(X, def_val, desc) \
+	static unsigned int X = def_val;\
+	module_param(X , uint, 0444); \
+	MODULE_PARM_DESC(X, desc);
+
+
+/*
+ * Device scope module parameters
+ */
+
+/* Enable RSS UDP traffic */
+MLX4_EN_PARM_INT(udp_rss, 1,
+		 "Enable RSS for incoming UDP traffic or disabled (0)");
+
+/* Priority pausing */
+MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
+			   " Per priority bit mask");
+MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
+			   " Per priority bit mask");
+
+MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
+		 "Threshold for using inline data (range: 17-104, default: 104)");
+
+#define MAX_PFC_TX     0xff
+#define MAX_PFC_RX     0xff
+
+void en_print(const char *level, const struct mlx4_en_priv *priv,
+	      const char *format, ...)
+{
+	va_list args;
+	struct va_format vaf;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+	if (priv->registered)
+		printk("%s%s: %s: %pV",
+		       level, DRV_NAME, priv->dev->name, &vaf);
+	else
+		printk("%s%s: %s: Port %d: %pV",
+		       level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
+		       priv->port, &vaf);
+	va_end(args);
+}
+
+void mlx4_en_update_loopback_state(struct net_device *dev,
+				   netdev_features_t features)
+{
+	struct mlx4_en_priv *priv = netdev_priv(dev);
+
+	if (features & NETIF_F_LOOPBACK)
+		priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
+	else
+		priv->ctrl_flags &= cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
+
+	priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
+			MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
+
+	/* Drop the packet if SRIOV is not enabled
+	 * and not performing the selftest or flb disabled
+	 */
+	if (mlx4_is_mfunc(priv->mdev->dev) &&
+	    !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
+		priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
+
+	/* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
+	 * is requested
+	 */
+	if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
+		priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
+
+	mutex_lock(&priv->mdev->state_lock);
+	if ((priv->mdev->dev->caps.flags2 &
+	     MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB) &&
+	    priv->rss_map.indir_qp && priv->rss_map.indir_qp->qpn) {
+		int i;
+		int err = 0;
+		int loopback = !!(features & NETIF_F_LOOPBACK);
+
+		for (i = 0; i < priv->rx_ring_num; i++) {
+			int ret;
+
+			ret = mlx4_en_change_mcast_lb(priv,
+						      &priv->rss_map.qps[i],
+						      loopback);
+			if (!err)
+				err = ret;
+		}
+		if (err)
+			mlx4_warn(priv->mdev, "failed to change mcast loopback\n");
+	}
+	mutex_unlock(&priv->mdev->state_lock);
+}
+
+static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)
+{
+	struct mlx4_en_profile *params = &mdev->profile;
+	int i;
+
+	params->udp_rss = udp_rss;
+	params->max_num_tx_rings_p_up = mlx4_low_memory_profile() ?
+		MLX4_EN_MIN_TX_RING_P_UP :
+		min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);
+
+	if (params->udp_rss && !(mdev->dev->caps.flags
+					& MLX4_DEV_CAP_FLAG_UDP_RSS)) {
+		mlx4_warn(mdev, "UDP RSS is not supported on this device\n");
+		params->udp_rss = 0;
+	}
+	for (i = 1; i <= MLX4_MAX_PORTS; i++) {
+		params->prof[i].rx_pause = !(pfcrx || pfctx);
+		params->prof[i].rx_ppp = pfcrx;
+		params->prof[i].tx_pause = !(pfcrx || pfctx);
+		params->prof[i].tx_ppp = pfctx;
+		if (mlx4_low_memory_profile()) {
+			params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE;
+			params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE;
+		} else {
+			params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
+			params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
+		}
+		params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;
+		params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;
+		params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *
+			params->prof[i].num_up;
+		params->prof[i].rss_rings = 0;
+		params->prof[i].inline_thold = inline_thold;
+	}
+}
+
+static int mlx4_en_event(struct notifier_block *this, unsigned long event,
+			 void *param)
+{
+	struct mlx4_en_dev *mdev =
+		container_of(this, struct mlx4_en_dev, mlx_nb);
+	struct mlx4_dev *dev = mdev->dev;
+	struct mlx4_en_priv *priv;
+	int port;
+
+	switch (event) {
+	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
+	case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
+	case MLX4_DEV_EVENT_SLAVE_INIT:
+	case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
+		break;
+	default:
+		port = *(int *)param;
+		break;
+	}
+
+	switch (event) {
+	case MLX4_DEV_EVENT_PORT_UP:
+	case MLX4_DEV_EVENT_PORT_DOWN:
+		if (!mdev->pndev[port])
+			return NOTIFY_DONE;
+		priv = netdev_priv(mdev->pndev[port]);
+		/* To prevent races, we poll the link state in a separate
+		  task rather than changing it here */
+		priv->link_state = event;
+		queue_work(mdev->workqueue, &priv->linkstate_task);
+		break;
+
+	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
+		mlx4_err(mdev, "Internal error detected, restarting device\n");
+		break;
+
+	case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
+	case MLX4_DEV_EVENT_SLAVE_INIT:
+	case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
+		break;
+	default:
+		if (port < 1 || port > dev->caps.num_ports ||
+		    !mdev->pndev[port])
+			return NOTIFY_DONE;
+		mlx4_warn(mdev, "Unhandled event %d for port %d\n", (int)event,
+			  port);
+	}
+
+	return NOTIFY_DONE;
+}
+
+static void mlx4_en_remove(struct auxiliary_device *adev)
+{
+	struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);
+	struct mlx4_dev *dev = madev->mdev;
+	struct mlx4_en_dev *mdev = auxiliary_get_drvdata(adev);
+	int i;
+
+	mlx4_unregister_event_notifier(dev, &mdev->mlx_nb);
+
+	mutex_lock(&mdev->state_lock);
+	mdev->device_up = false;
+	mutex_unlock(&mdev->state_lock);
+
+	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
+		if (mdev->pndev[i])
+			mlx4_en_destroy_netdev(mdev->pndev[i]);
+
+	destroy_workqueue(mdev->workqueue);
+	(void) mlx4_mr_free(dev, &mdev->mr);
+	iounmap(mdev->uar_map);
+	mlx4_uar_free(dev, &mdev->priv_uar);
+	mlx4_pd_free(dev, mdev->priv_pdn);
+	if (mdev->netdev_nb.notifier_call)
+		unregister_netdevice_notifier(&mdev->netdev_nb);
+	kfree(mdev);
+}
+
+static int mlx4_en_probe(struct auxiliary_device *adev,
+			 const struct auxiliary_device_id *id)
+{
+	struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);
+	struct mlx4_dev *dev = madev->mdev;
+	struct mlx4_en_dev *mdev;
+	int err, i;
+
+	printk_once(KERN_INFO "%s", mlx4_en_version);
+
+	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
+	if (!mdev) {
+		err = -ENOMEM;
+		goto err_free_res;
+	}
+
+	err = mlx4_pd_alloc(dev, &mdev->priv_pdn);
+	if (err)
+		goto err_free_dev;
+
+	err = mlx4_uar_alloc(dev, &mdev->priv_uar);
+	if (err)
+		goto err_pd;
+
+	mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
+				PAGE_SIZE);
+	if (!mdev->uar_map) {
+		err = -ENOMEM;
+		goto err_uar;
+	}
+	spin_lock_init(&mdev->uar_lock);
+
+	mdev->dev = dev;
+	mdev->dma_device = &dev->persist->pdev->dev;
+	mdev->pdev = dev->persist->pdev;
+	mdev->device_up = false;
+
+	mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
+	if (!mdev->LSO_support)
+		mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
+
+	err = mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
+			    MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 0, 0,
+			    &mdev->mr);
+	if (err) {
+		mlx4_err(mdev, "Failed allocating memory region\n");
+		goto err_map;
+	}
+	err = mlx4_mr_enable(mdev->dev, &mdev->mr);
+	if (err) {
+		mlx4_err(mdev, "Failed enabling memory region\n");
+		goto err_mr;
+	}
+
+	/* Build device profile according to supplied module parameters */
+	mlx4_en_get_profile(mdev);
+
+	/* Configure which ports to start according to module parameters */
+	mdev->port_cnt = 0;
+	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
+		mdev->port_cnt++;
+
+	/* Set default number of RX rings*/
+	mlx4_en_set_num_rx_rings(mdev);
+
+	/* Create our own workqueue for reset/multicast tasks
+	 * Note: we cannot use the shared workqueue because of deadlocks caused
+	 *       by the rtnl lock */
+	mdev->workqueue = create_singlethread_workqueue("mlx4_en");
+	if (!mdev->workqueue) {
+		err = -ENOMEM;
+		goto err_mr;
+	}
+
+	/* At this stage all non-port specific tasks are complete:
+	 * mark the card state as up */
+	mutex_init(&mdev->state_lock);
+	mdev->device_up = true;
+
+	/* register mlx4 core notifier */
+	mdev->mlx_nb.notifier_call = mlx4_en_event;
+	err = mlx4_register_event_notifier(dev, &mdev->mlx_nb);
+	WARN(err, "failed to register mlx4 event notifier (%d)", err);
+
+	/* Setup ports */
+
+	/* Create a netdev for each port */
+	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
+		mlx4_info(mdev, "Activating port:%d\n", i);
+		if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
+			mdev->pndev[i] = NULL;
+	}
+
+	/* register netdev notifier */
+	mdev->netdev_nb.notifier_call = mlx4_en_netdev_event;
+	if (register_netdevice_notifier(&mdev->netdev_nb)) {
+		mdev->netdev_nb.notifier_call = NULL;
+		mlx4_err(mdev, "Failed to create netdev notifier\n");
+	}
+
+	auxiliary_set_drvdata(adev, mdev);
+	return 0;
+
+err_mr:
+	(void) mlx4_mr_free(dev, &mdev->mr);
+err_map:
+	if (mdev->uar_map)
+		iounmap(mdev->uar_map);
+err_uar:
+	mlx4_uar_free(dev, &mdev->priv_uar);
+err_pd:
+	mlx4_pd_free(dev, mdev->priv_pdn);
+err_free_dev:
+	kfree(mdev);
+err_free_res:
+	return err;
+}
+
+static const struct auxiliary_device_id mlx4_en_id_table[] = {
+	{ .name = MLX4_ADEV_NAME ".eth" },
+	{},
+};
+
+MODULE_DEVICE_TABLE(auxiliary, mlx4_en_id_table);
+
+static struct mlx4_adrv mlx4_en_adrv = {
+	.adrv = {
+		.name	= "eth",
+		.probe	= mlx4_en_probe,
+		.remove	= mlx4_en_remove,
+		.id_table = mlx4_en_id_table,
+	},
+	.protocol	= MLX4_PROT_ETH,
+};
+
+static void mlx4_en_verify_params(void)
+{
+	if (pfctx > MAX_PFC_TX) {
+		pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
+			pfctx, MAX_PFC_TX);
+		pfctx = 0;
+	}
+
+	if (pfcrx > MAX_PFC_RX) {
+		pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
+			pfcrx, MAX_PFC_RX);
+		pfcrx = 0;
+	}
+
+	if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
+		pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
+			inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
+		inline_thold = MAX_INLINE;
+	}
+}
+
+static int __init mlx4_en_init(void)
+{
+	mlx4_en_verify_params();
+	mlx4_en_init_ptys2ethtool_map();
+
+	return mlx4_register_auxiliary_driver(&mlx4_en_adrv);
+}
+
+static void __exit mlx4_en_cleanup(void)
+{
+	mlx4_unregister_auxiliary_driver(&mlx4_en_adrv);
+}
+
+module_init(mlx4_en_init);
+module_exit(mlx4_en_cleanup);
+