1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
  2/* Copyright 2017-2019 NXP */
  3
  4#include <linux/module.h>
  5#include "enetc.h"
  6
  7#define ENETC_DRV_NAME_STR "ENETC VF driver"
  8
  9/* Messaging */
 10static void enetc_msg_vsi_write_msg(struct enetc_hw *hw,
 11				    struct enetc_msg_swbd *msg)
 12{
 13	u32 val;
 14
 15	val = enetc_vsi_set_msize(msg->size) | lower_32_bits(msg->dma);
 16	enetc_wr(hw, ENETC_VSIMSGSNDAR1, upper_32_bits(msg->dma));
 17	enetc_wr(hw, ENETC_VSIMSGSNDAR0, val);
 18}
 19
 20static int enetc_msg_vsi_send(struct enetc_si *si, struct enetc_msg_swbd *msg)
 21{
 22	int timeout = 100;
 23	u32 vsimsgsr;
 24
 25	enetc_msg_vsi_write_msg(&si->hw, msg);
 26
 27	do {
 28		vsimsgsr = enetc_rd(&si->hw, ENETC_VSIMSGSR);
 29		if (!(vsimsgsr & ENETC_VSIMSGSR_MB))
 30			break;
 31
 32		usleep_range(1000, 2000);
 33	} while (--timeout);
 34
 35	if (!timeout)
 36		return -ETIMEDOUT;
 37
 38	/* check for message delivery error */
 39	if (vsimsgsr & ENETC_VSIMSGSR_MS) {
 40		dev_err(&si->pdev->dev, "VSI command execute error: %d\n",
 41			ENETC_SIMSGSR_GET_MC(vsimsgsr));
 42		return -EIO;
 43	}
 44
 45	return 0;
 46}
 47
 48static int enetc_msg_vsi_set_primary_mac_addr(struct enetc_ndev_priv *priv,
 49					      struct sockaddr *saddr)
 50{
 51	struct enetc_msg_cmd_set_primary_mac *cmd;
 52	struct enetc_msg_swbd msg;
 53	int err;
 54
 55	msg.size = ALIGN(sizeof(struct enetc_msg_cmd_set_primary_mac), 64);
 56	msg.vaddr = dma_alloc_coherent(priv->dev, msg.size, &msg.dma,
 57				       GFP_KERNEL);
 58	if (!msg.vaddr) {
 59		dev_err(priv->dev, "Failed to alloc Tx msg (size: %d)\n",
 60			msg.size);
 61		return -ENOMEM;
 62	}
 63
 64	cmd = (struct enetc_msg_cmd_set_primary_mac *)msg.vaddr;
 65	cmd->header.type = ENETC_MSG_CMD_MNG_MAC;
 66	cmd->header.id = ENETC_MSG_CMD_MNG_ADD;
 67	memcpy(&cmd->mac, saddr, sizeof(struct sockaddr));
 68
 69	/* send the command and wait */
 70	err = enetc_msg_vsi_send(priv->si, &msg);
 71
 72	dma_free_coherent(priv->dev, msg.size, msg.vaddr, msg.dma);
 73
 74	return err;
 75}
 76
 77static int enetc_vf_set_mac_addr(struct net_device *ndev, void *addr)
 78{
 79	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 80	struct sockaddr *saddr = addr;
 81
 82	if (!is_valid_ether_addr(saddr->sa_data))
 83		return -EADDRNOTAVAIL;
 84
 85	return enetc_msg_vsi_set_primary_mac_addr(priv, saddr);
 86}
 87
 88static int enetc_vf_set_features(struct net_device *ndev,
 89				 netdev_features_t features)
 90{
 91	enetc_set_features(ndev, features);
 92
 93	return 0;
 94}
 95
 96static int enetc_vf_setup_tc(struct net_device *ndev, enum tc_setup_type type,
 97			     void *type_data)
 98{
 99	switch (type) {
100	case TC_SETUP_QDISC_MQPRIO:
101		return enetc_setup_tc_mqprio(ndev, type_data);
102	default:
103		return -EOPNOTSUPP;
104	}
105}
106
107/* Probing/ Init */
108static const struct net_device_ops enetc_ndev_ops = {
109	.ndo_open		= enetc_open,
110	.ndo_stop		= enetc_close,
111	.ndo_start_xmit		= enetc_xmit,
112	.ndo_get_stats		= enetc_get_stats,
113	.ndo_set_mac_address	= enetc_vf_set_mac_addr,
114	.ndo_set_features	= enetc_vf_set_features,
115	.ndo_eth_ioctl		= enetc_ioctl,
116	.ndo_setup_tc		= enetc_vf_setup_tc,
117};
118
119static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
120				  const struct net_device_ops *ndev_ops)
121{
122	struct enetc_ndev_priv *priv = netdev_priv(ndev);
123
124	SET_NETDEV_DEV(ndev, &si->pdev->dev);
125	priv->ndev = ndev;
126	priv->si = si;
127	priv->dev = &si->pdev->dev;
128	si->ndev = ndev;
129
130	priv->msg_enable = (NETIF_MSG_IFUP << 1) - 1;
131	ndev->netdev_ops = ndev_ops;
132	enetc_set_ethtool_ops(ndev);
133	ndev->watchdog_timeo = 5 * HZ;
134	ndev->max_mtu = ENETC_MAX_MTU;
135
136	ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
137			    NETIF_F_HW_VLAN_CTAG_TX |
138			    NETIF_F_HW_VLAN_CTAG_RX |
139			    NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
140	ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM |
141			 NETIF_F_HW_VLAN_CTAG_TX |
142			 NETIF_F_HW_VLAN_CTAG_RX |
143			 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
144	ndev->vlan_features = NETIF_F_SG | NETIF_F_HW_CSUM |
145			      NETIF_F_TSO | NETIF_F_TSO6;
146
147	if (si->num_rss)
148		ndev->hw_features |= NETIF_F_RXHASH;
149
150	/* pick up primary MAC address from SI */
151	enetc_load_primary_mac_addr(&si->hw, ndev);
152}
153
154static int enetc_vf_probe(struct pci_dev *pdev,
155			  const struct pci_device_id *ent)
156{
157	struct enetc_ndev_priv *priv;
158	struct net_device *ndev;
159	struct enetc_si *si;
160	int err;
161
162	err = enetc_pci_probe(pdev, KBUILD_MODNAME, 0);
163	if (err)
164		return dev_err_probe(&pdev->dev, err, "PCI probing failed\n");
165
166	si = pci_get_drvdata(pdev);
167
168	enetc_get_si_caps(si);
169
170	ndev = alloc_etherdev_mq(sizeof(*priv), ENETC_MAX_NUM_TXQS);
171	if (!ndev) {
172		err = -ENOMEM;
173		dev_err(&pdev->dev, "netdev creation failed\n");
174		goto err_alloc_netdev;
175	}
176
177	enetc_vf_netdev_setup(si, ndev, &enetc_ndev_ops);
178
179	priv = netdev_priv(ndev);
180
181	enetc_init_si_rings_params(priv);
182
183	err = enetc_setup_cbdr(priv->dev, &si->hw, ENETC_CBDR_DEFAULT_SIZE,
184			       &si->cbd_ring);
185	if (err)
186		goto err_setup_cbdr;
187
188	err = enetc_alloc_si_resources(priv);
189	if (err) {
190		dev_err(&pdev->dev, "SI resource alloc failed\n");
191		goto err_alloc_si_res;
192	}
193
194	err = enetc_configure_si(priv);
195	if (err) {
196		dev_err(&pdev->dev, "Failed to configure SI\n");
197		goto err_config_si;
198	}
199
200	err = enetc_alloc_msix(priv);
201	if (err) {
202		dev_err(&pdev->dev, "MSIX alloc failed\n");
203		goto err_alloc_msix;
204	}
205
206	err = register_netdev(ndev);
207	if (err)
208		goto err_reg_netdev;
209
210	netif_carrier_off(ndev);
211
212	return 0;
213
214err_reg_netdev:
215	enetc_free_msix(priv);
216err_config_si:
217err_alloc_msix:
218	enetc_free_si_resources(priv);
219err_alloc_si_res:
220	enetc_teardown_cbdr(&si->cbd_ring);
221err_setup_cbdr:
222	si->ndev = NULL;
223	free_netdev(ndev);
224err_alloc_netdev:
225	enetc_pci_remove(pdev);
226
227	return err;
228}
229
230static void enetc_vf_remove(struct pci_dev *pdev)
231{
232	struct enetc_si *si = pci_get_drvdata(pdev);
233	struct enetc_ndev_priv *priv;
234
235	priv = netdev_priv(si->ndev);
236	unregister_netdev(si->ndev);
237
238	enetc_free_msix(priv);
239
240	enetc_free_si_resources(priv);
241	enetc_teardown_cbdr(&si->cbd_ring);
242
243	free_netdev(si->ndev);
244
245	enetc_pci_remove(pdev);
246}
247
248static const struct pci_device_id enetc_vf_id_table[] = {
249	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_VF) },
250	{ 0, } /* End of table. */
251};
252MODULE_DEVICE_TABLE(pci, enetc_vf_id_table);
253
254static struct pci_driver enetc_vf_driver = {
255	.name = KBUILD_MODNAME,
256	.id_table = enetc_vf_id_table,
257	.probe = enetc_vf_probe,
258	.remove = enetc_vf_remove,
259};
260module_pci_driver(enetc_vf_driver);
261
262MODULE_DESCRIPTION(ENETC_DRV_NAME_STR);
263MODULE_LICENSE("Dual BSD/GPL");