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Message-Id: <20220104064657.2095041-4-dmichail@fungible.com>
Date: Mon, 3 Jan 2022 22:46:52 -0800
From: Dimitris Michailidis <d.michailidis@...gible.com>
To: davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
andrew@...n.ch, d.michailidis@...gible.com
Subject: [PATCH net-next v4 3/8] net/funeth: probing and netdev ops
This is the first part of the Fungible ethernet driver. It deals with
device probing, net_device creation, and netdev ops.
Signed-off-by: Dimitris Michailidis <dmichail@...gible.com>
---
drivers/net/ethernet/fungible/funeth/funeth.h | 147 ++
.../ethernet/fungible/funeth/funeth_main.c | 1773 +++++++++++++++++
2 files changed, 1920 insertions(+)
create mode 100644 drivers/net/ethernet/fungible/funeth/funeth.h
create mode 100644 drivers/net/ethernet/fungible/funeth/funeth_main.c
diff --git a/drivers/net/ethernet/fungible/funeth/funeth.h b/drivers/net/ethernet/fungible/funeth/funeth.h
new file mode 100644
index 000000000000..cc49d517ceaf
--- /dev/null
+++ b/drivers/net/ethernet/fungible/funeth/funeth.h
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+
+#ifndef _FUNETH_H
+#define _FUNETH_H
+
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/net_tstamp.h>
+#include <linux/seqlock.h>
+#include <net/devlink.h>
+#include "fun_dev.h"
+
+#define ADMIN_SQE_SIZE SZ_128
+#define ADMIN_CQE_SIZE SZ_64
+#define ADMIN_RSP_MAX_LEN (ADMIN_CQE_SIZE - sizeof(struct fun_cqe_info))
+
+#define FUN_MAX_MTU 9024
+
+#define SQ_DEPTH 512U
+#define CQ_DEPTH 1024U
+#define RQ_DEPTH (512U / (PAGE_SIZE / 4096))
+
+#define CQ_INTCOAL_USEC 10
+#define CQ_INTCOAL_NPKT 16
+#define SQ_INTCOAL_USEC 10
+#define SQ_INTCOAL_NPKT 16
+
+#define INVALID_LPORT 0xffff
+
+#define FUN_PORT_CAP_PAUSE_MASK (FUN_PORT_CAP_TX_PAUSE | FUN_PORT_CAP_RX_PAUSE)
+
+struct fun_vport_info {
+ u8 mac[ETH_ALEN];
+ u16 vlan;
+ __be16 vlan_proto;
+ u8 qos;
+ u8 spoofchk:1;
+ u8 trusted:1;
+ unsigned int max_rate;
+};
+
+/* "subclass" of fun_dev for Ethernet functions */
+struct fun_ethdev {
+ struct fun_dev fdev;
+
+ /* the function's network ports */
+ struct net_device **netdevs;
+ unsigned int num_ports;
+
+ /* configuration for the function's virtual ports */
+ unsigned int num_vports;
+ struct fun_vport_info *vport_info;
+
+ unsigned int nsqs_per_port;
+};
+
+static inline struct fun_ethdev *to_fun_ethdev(struct fun_dev *p)
+{
+ return container_of(p, struct fun_ethdev, fdev);
+}
+
+/* Per netdevice driver state, i.e., netdev_priv. */
+struct funeth_priv {
+ struct fun_dev *fdev;
+ struct pci_dev *pdev;
+ struct net_device *netdev;
+
+ struct funeth_rxq * __rcu *rxqs;
+ struct funeth_txq **txqs;
+ struct funeth_txq **xdpqs;
+
+ struct fun_irq *irqs;
+ unsigned int num_irqs;
+ unsigned int num_tx_irqs;
+
+ unsigned int lane_attrs;
+ u16 lport;
+
+ /* link settings */
+ u64 port_caps;
+ u64 advertising;
+ u64 lp_advertising;
+ unsigned int link_speed;
+ u8 xcvr_type;
+ u8 active_fc;
+ u8 active_fec;
+ u8 link_down_reason;
+ seqcount_t link_seq;
+
+ u32 msg_enable;
+
+ unsigned int ethid_start;
+
+ unsigned int num_xdpqs;
+
+ /* ethtool, etc. config parameters */
+ unsigned int sq_depth;
+ unsigned int rq_depth;
+ unsigned int cq_depth;
+ unsigned int cq_irq_db;
+ u8 tx_coal_usec;
+ u8 tx_coal_count;
+ u8 rx_coal_usec;
+ u8 rx_coal_count;
+
+ struct hwtstamp_config hwtstamp_cfg;
+
+ /* cumulative queue stats from earlier queue instances */
+ u64 tx_packets;
+ u64 tx_bytes;
+ u64 tx_dropped;
+ u64 rx_packets;
+ u64 rx_bytes;
+ u64 rx_dropped;
+
+ /* RSS */
+ unsigned int rss_hw_id;
+ enum fun_eth_hash_alg hash_algo;
+ u8 rss_key[FUN_ETH_RSS_MAX_KEY_SIZE];
+ unsigned int indir_table_nentries;
+ u32 indir_table[FUN_ETH_RSS_MAX_INDIR_ENT];
+ dma_addr_t rss_dma_addr;
+ void *rss_cfg;
+
+ /* DMA area for port stats */
+ dma_addr_t stats_dma_addr;
+ __be64 *stats;
+
+ struct bpf_prog *xdp_prog;
+
+ struct devlink_port dl_port;
+
+ /* kTLS state */
+ unsigned int ktls_id;
+ atomic64_t tx_tls_add;
+ atomic64_t tx_tls_del;
+ atomic64_t tx_tls_resync;
+};
+
+void fun_set_ethtool_ops(struct net_device *netdev);
+int fun_port_write_cmd(struct funeth_priv *fp, int key, u64 data);
+int fun_port_read_cmd(struct funeth_priv *fp, int key, u64 *data);
+int fun_create_and_bind_tx(struct funeth_priv *fp, u32 ethid, u32 sqid);
+void fun_reset_rss_indir(struct net_device *dev);
+int fun_config_rss(struct net_device *dev, int algo, const u8 *key,
+ const u32 *qtable, u8 op);
+
+#endif /* _FUNETH_H */
diff --git a/drivers/net/ethernet/fungible/funeth/funeth_main.c b/drivers/net/ethernet/fungible/funeth/funeth_main.c
new file mode 100644
index 000000000000..33444d114ac9
--- /dev/null
+++ b/drivers/net/ethernet/fungible/funeth/funeth_main.c
@@ -0,0 +1,1773 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+
+#include <linux/bpf.h>
+#include <linux/crash_dump.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/filter.h>
+#include <linux/idr.h>
+#include <linux/if_vlan.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/pci.h>
+#include <linux/rtnetlink.h>
+#include <linux/inetdevice.h>
+
+#include "funeth.h"
+#include "funeth_devlink.h"
+#include "funeth_ktls.h"
+#include "fun_port.h"
+#include "fun_queue.h"
+#include "funeth_txrx.h"
+
+#define ADMIN_SQ_DEPTH 32
+#define ADMIN_CQ_DEPTH 64
+#define ADMIN_RQ_DEPTH 16
+
+/* Default number of Tx/Rx queues. */
+#define FUN_DFLT_QUEUES 16U
+
+enum {
+ FUN_SERV_RES_CHANGE = FUN_SERV_FIRST_AVAIL,
+ FUN_SERV_DEL_PORTS,
+};
+
+static const struct pci_device_id funeth_id_table[] = {
+ { PCI_VDEVICE(FUNGIBLE, 0x0101) },
+ { PCI_VDEVICE(FUNGIBLE, 0x0181) },
+ { 0, }
+};
+
+/* Issue a port write admin command with @n key/value pairs. */
+static int fun_port_write_cmds(struct funeth_priv *fp, unsigned int n,
+ const int *keys, const u64 *data)
+{
+ unsigned int cmd_size, i;
+ union {
+ struct fun_admin_port_req req;
+ struct fun_admin_port_rsp rsp;
+ u8 v[ADMIN_SQE_SIZE];
+ } cmd;
+
+ cmd_size = offsetof(struct fun_admin_port_req, u.write.write48) +
+ n * sizeof(struct fun_admin_write48_req);
+ if (cmd_size > sizeof(cmd) || cmd_size > ADMIN_RSP_MAX_LEN)
+ return -EINVAL;
+
+ cmd.req.common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_PORT,
+ cmd_size);
+ cmd.req.u.write =
+ FUN_ADMIN_PORT_WRITE_REQ_INIT(FUN_ADMIN_SUBOP_WRITE, 0,
+ fp->netdev->dev_port);
+ for (i = 0; i < n; i++)
+ cmd.req.u.write.write48[i] =
+ FUN_ADMIN_WRITE48_REQ_INIT(keys[i], data[i]);
+
+ return fun_submit_admin_sync_cmd(fp->fdev, &cmd.req.common,
+ &cmd.rsp, cmd_size, 0);
+}
+
+int fun_port_write_cmd(struct funeth_priv *fp, int key, u64 data)
+{
+ return fun_port_write_cmds(fp, 1, &key, &data);
+}
+
+/* Issue a port read admin command with @n key/value pairs. */
+static int fun_port_read_cmds(struct funeth_priv *fp, unsigned int n,
+ const int *keys, u64 *data)
+{
+ const struct fun_admin_read48_rsp *r48rsp;
+ unsigned int cmd_size, i;
+ int rc;
+ union {
+ struct fun_admin_port_req req;
+ struct fun_admin_port_rsp rsp;
+ u8 v[ADMIN_SQE_SIZE];
+ } cmd;
+
+ cmd_size = offsetof(struct fun_admin_port_req, u.read.read48) +
+ n * sizeof(struct fun_admin_read48_req);
+ if (cmd_size > sizeof(cmd) || cmd_size > ADMIN_RSP_MAX_LEN)
+ return -EINVAL;
+
+ cmd.req.common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_PORT,
+ cmd_size);
+ cmd.req.u.read =
+ FUN_ADMIN_PORT_READ_REQ_INIT(FUN_ADMIN_SUBOP_READ, 0,
+ fp->netdev->dev_port);
+ for (i = 0; i < n; i++)
+ cmd.req.u.read.read48[i] = FUN_ADMIN_READ48_REQ_INIT(keys[i]);
+
+ rc = fun_submit_admin_sync_cmd(fp->fdev, &cmd.req.common,
+ &cmd.rsp, cmd_size, 0);
+ if (rc)
+ return rc;
+
+ for (r48rsp = cmd.rsp.u.read.read48, i = 0; i < n; i++, r48rsp++) {
+ data[i] = FUN_ADMIN_READ48_RSP_DATA_G(r48rsp->key_to_data);
+ dev_dbg(fp->fdev->dev,
+ "port_read_rsp lport=%u (key_to_data=0x%llx) key=%d data:%lld retval:%lld",
+ fp->lport, r48rsp->key_to_data, keys[i], data[i],
+ FUN_ADMIN_READ48_RSP_RET_G(r48rsp->key_to_data));
+ }
+ return 0;
+}
+
+int fun_port_read_cmd(struct funeth_priv *fp, int key, u64 *data)
+{
+ return fun_port_read_cmds(fp, 1, &key, data);
+}
+
+static void fun_report_link(struct net_device *netdev)
+{
+ if (netif_carrier_ok(netdev)) {
+ const struct funeth_priv *fp = netdev_priv(netdev);
+ const char *fec = "", *pause = "";
+ int speed = fp->link_speed;
+ char unit = 'M';
+
+ if (fp->link_speed >= SPEED_1000) {
+ speed /= 1000;
+ unit = 'G';
+ }
+
+ if (fp->active_fec & FUN_PORT_FEC_RS)
+ fec = ", RS-FEC";
+ else if (fp->active_fec & FUN_PORT_FEC_FC)
+ fec = ", BASER-FEC";
+
+ if ((fp->active_fc & FUN_PORT_CAP_PAUSE_MASK) == FUN_PORT_CAP_PAUSE_MASK)
+ pause = ", Tx/Rx PAUSE";
+ else if (fp->active_fc & FUN_PORT_CAP_RX_PAUSE)
+ pause = ", Rx PAUSE";
+ else if (fp->active_fc & FUN_PORT_CAP_TX_PAUSE)
+ pause = ", Tx PAUSE";
+
+ netdev_info(netdev, "Link up at %d %cb/s full-duplex%s%s%s\n",
+ speed, unit, pause, fec,
+ netif_dormant(netdev) ? ", dormant" : "");
+ } else {
+ netdev_info(netdev, "Link down\n");
+ }
+}
+
+static int fun_adi_write(struct fun_dev *fdev, enum fun_admin_adi_attr attr,
+ unsigned int adi_id, const struct fun_adi_param *param)
+{
+ struct fun_admin_adi_req req = {
+ .common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_ADI,
+ sizeof(req)),
+ .u.write.subop = FUN_ADMIN_SUBOP_WRITE,
+ .u.write.attribute = attr,
+ .u.write.id = cpu_to_be32(adi_id),
+ .u.write.param = *param
+ };
+
+ return fun_submit_admin_sync_cmd(fdev, &req.common, NULL, 0, 0);
+}
+
+/* Configure RSS for the given port. @op determines whether a new RSS context
+ * is to be created or whether an existing one should be reconfigured. The
+ * remaining parameters specify the hashing algorithm, key, and indirection
+ * table.
+ *
+ * This initiates packet delivery to the Rx queues set in the indirection
+ * table.
+ */
+int fun_config_rss(struct net_device *dev, int algo, const u8 *key,
+ const u32 *qtable, u8 op)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ unsigned int table_len = fp->indir_table_nentries;
+ unsigned int len = FUN_ETH_RSS_MAX_KEY_SIZE + sizeof(u32) * table_len;
+ struct funeth_rxq **rxqs = rtnl_dereference(fp->rxqs);
+ __be32 *indir_tab;
+ u16 flags;
+ int rc;
+ union {
+ struct {
+ struct fun_admin_rss_req req;
+ struct fun_dataop_gl gl;
+ };
+ struct fun_admin_generic_create_rsp rsp;
+ } cmd;
+
+ if (op != FUN_ADMIN_SUBOP_CREATE && fp->rss_hw_id == FUN_HCI_ID_INVALID)
+ return -EINVAL;
+
+ flags = op == FUN_ADMIN_SUBOP_CREATE ?
+ FUN_ADMIN_RES_CREATE_FLAG_ALLOCATOR : 0;
+ cmd.req.common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_RSS,
+ sizeof(cmd));
+ cmd.req.u.create =
+ FUN_ADMIN_RSS_CREATE_REQ_INIT(op, flags, fp->rss_hw_id,
+ dev->dev_port, algo,
+ FUN_ETH_RSS_MAX_KEY_SIZE,
+ table_len, 0,
+ FUN_ETH_RSS_MAX_KEY_SIZE);
+ cmd.req.u.create.dataop = FUN_DATAOP_HDR_INIT(1, 0, 1, 0, len);
+ fun_dataop_gl_init(&cmd.gl, 0, 0, len, fp->rss_dma_addr);
+
+ /* write the key and indirection table into the RSS DMA area */
+ memcpy(fp->rss_cfg, key, FUN_ETH_RSS_MAX_KEY_SIZE);
+ indir_tab = fp->rss_cfg + FUN_ETH_RSS_MAX_KEY_SIZE;
+ for (rc = 0; rc < table_len; rc++)
+ *indir_tab++ = cpu_to_be32(rxqs[*qtable++]->hw_cqid);
+
+ rc = fun_submit_admin_sync_cmd(fp->fdev, &cmd.req.common,
+ &cmd.rsp, sizeof(cmd.rsp), 0);
+ if (!rc && op == FUN_ADMIN_SUBOP_CREATE)
+ fp->rss_hw_id = be32_to_cpu(cmd.rsp.id);
+ return rc;
+}
+
+/* Destroy the HW RSS conntext associated with the given port. This also stops
+ * all packet delivery to our Rx queues.
+ */
+static int fun_destroy_rss(struct funeth_priv *fp)
+{
+ int rc;
+
+ if (fp->rss_hw_id == FUN_HCI_ID_INVALID)
+ return 0;
+
+ rc = fun_res_destroy(fp->fdev, FUN_ADMIN_OP_RSS, 0, fp->rss_hw_id);
+ fp->rss_hw_id = FUN_HCI_ID_INVALID;
+ return rc;
+}
+
+static void free_txqs(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct funeth_txq **txqs = fp->txqs;
+ unsigned int i;
+
+ for (i = 0; i < dev->real_num_tx_queues && txqs[i]; i++) {
+ fp->irqs[txqs[i]->irq_idx].txq = NULL;
+ funeth_txq_free(txqs[i]);
+ txqs[i] = NULL;
+ }
+}
+
+static int alloc_txqs(struct net_device *dev, unsigned int start_irq)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct funeth_txq **txqs = fp->txqs, *q;
+ unsigned int i;
+
+ for (i = 0; i < dev->real_num_tx_queues; i++) {
+ q = funeth_txq_create(dev, i, fp->sq_depth,
+ &fp->irqs[start_irq + i]);
+ if (IS_ERR(q)) {
+ free_txqs(dev);
+ return PTR_ERR(q);
+ }
+ txqs[i] = q;
+ }
+ return 0;
+}
+
+static void free_rxqs(struct net_device *dev, struct funeth_rxq **rxqs)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ unsigned int i;
+
+ for (i = 0; i < dev->real_num_rx_queues && rxqs[i]; i++) {
+ fp->irqs[rxqs[i]->irq_idx].rxq = NULL;
+ funeth_rxq_free(rxqs[i]);
+ rxqs[i] = NULL;
+ }
+}
+
+static int alloc_rxqs(struct net_device *dev, struct funeth_rxq **rxqs,
+ unsigned int start_irq)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct funeth_rxq *q;
+ unsigned int i;
+
+ for (i = 0; i < dev->real_num_rx_queues; i++) {
+ q = funeth_rxq_create(dev, i, fp->cq_depth, fp->rq_depth,
+ &fp->irqs[start_irq + i]);
+ if (IS_ERR(q)) {
+ free_rxqs(dev, rxqs);
+ return PTR_ERR(q);
+ }
+ rxqs[i] = q;
+ }
+ return 0;
+}
+
+static void free_xdpqs(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct funeth_txq **xdpqs = fp->xdpqs;
+ unsigned int i;
+
+ for (i = 0; i < fp->num_xdpqs && xdpqs[i]; i++) {
+ funeth_txq_free(xdpqs[i]);
+ xdpqs[i] = NULL;
+ }
+}
+
+static int alloc_xdpqs(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct funeth_txq **xdpqs = fp->xdpqs, *q;
+ unsigned int i;
+
+ for (i = 0; i < fp->num_xdpqs; i++) {
+ q = funeth_txq_create(dev, i, fp->sq_depth, NULL);
+ if (IS_ERR(q)) {
+ free_xdpqs(dev);
+ return PTR_ERR(q);
+ }
+ xdpqs[i] = q;
+ }
+ return 0;
+}
+
+static void fun_free_rings(struct net_device *netdev)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+ struct funeth_rxq **rxqs = rtnl_dereference(fp->rxqs);
+
+ if (!rxqs)
+ return;
+
+ rcu_assign_pointer(fp->rxqs, NULL);
+ synchronize_net();
+
+ free_rxqs(netdev, rxqs);
+ free_txqs(netdev);
+ fp->txqs = NULL;
+ free_xdpqs(netdev);
+ fp->xdpqs = NULL;
+ kfree(rxqs);
+}
+
+static int fun_alloc_rings(struct net_device *netdev)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+ struct funeth_rxq **rxqs;
+ unsigned int total_qs;
+ int err;
+
+ total_qs = netdev->real_num_tx_queues + netdev->real_num_rx_queues +
+ fp->num_xdpqs;
+
+ rxqs = kcalloc(total_qs, sizeof(*rxqs), GFP_KERNEL);
+ if (!rxqs)
+ return -ENOMEM;
+
+ fp->txqs = (struct funeth_txq **)&rxqs[netdev->real_num_rx_queues];
+ err = alloc_txqs(netdev, 0);
+ if (err)
+ goto free_qvec;
+
+ if (fp->num_xdpqs) {
+ fp->xdpqs = (struct funeth_txq **)&rxqs[total_qs - fp->num_xdpqs];
+ err = alloc_xdpqs(netdev);
+ if (err)
+ goto free_txqs;
+ }
+
+ err = alloc_rxqs(netdev, rxqs, netdev->real_num_tx_queues);
+ if (err)
+ goto free_xdpqs;
+
+ rcu_assign_pointer(fp->rxqs, rxqs);
+ return 0;
+
+free_xdpqs:
+ free_xdpqs(netdev);
+free_txqs:
+ free_txqs(netdev);
+free_qvec:
+ fp->txqs = NULL;
+ fp->xdpqs = NULL;
+ kfree(rxqs);
+ return err;
+}
+
+static int fun_port_create(struct net_device *netdev)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+ union {
+ struct fun_admin_port_req req;
+ struct fun_admin_port_rsp rsp;
+ } cmd;
+ int rc;
+
+ if (fp->lport != INVALID_LPORT)
+ return 0;
+
+ cmd.req.common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_PORT,
+ sizeof(cmd.req));
+ cmd.req.u.create =
+ FUN_ADMIN_PORT_CREATE_REQ_INIT(FUN_ADMIN_SUBOP_CREATE, 0,
+ netdev->dev_port);
+
+ rc = fun_submit_admin_sync_cmd(fp->fdev, &cmd.req.common, &cmd.rsp,
+ sizeof(cmd.rsp), 0);
+
+ if (!rc)
+ fp->lport = be16_to_cpu(cmd.rsp.u.create.lport);
+ return rc;
+}
+
+static int fun_port_destroy(struct net_device *netdev)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+
+ if (fp->lport == INVALID_LPORT)
+ return 0;
+
+ fp->lport = INVALID_LPORT;
+ return fun_res_destroy(fp->fdev, FUN_ADMIN_OP_PORT, 0,
+ netdev->dev_port);
+}
+
+static int fun_eth_create(struct funeth_priv *fp, u32 ethid)
+{
+ struct fun_admin_eth_req req = {
+ .common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_ETH,
+ sizeof(req)),
+ .u.create =
+ FUN_ADMIN_ETH_CREATE_REQ_INIT(FUN_ADMIN_SUBOP_CREATE, 0,
+ ethid,
+ fp->netdev->dev_port)
+ };
+
+ return fun_submit_admin_sync_cmd(fp->fdev, &req.common, NULL, 0, 0);
+}
+
+static int fun_vi_create(struct funeth_priv *fp)
+{
+ struct fun_admin_vi_req req = {
+ .common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_VI,
+ sizeof(req)),
+ .u.create = FUN_ADMIN_VI_CREATE_REQ_INIT(FUN_ADMIN_SUBOP_CREATE,
+ 0,
+ fp->netdev->dev_port,
+ fp->netdev->dev_port)
+ };
+
+ return fun_submit_admin_sync_cmd(fp->fdev, &req.common, NULL, 0, 0);
+}
+
+/* helper to create an ETH flow and bind an SQ to it */
+int fun_create_and_bind_tx(struct funeth_priv *fp, u32 ethid, u32 sqid)
+{
+ int rc;
+
+ netif_info(fp, ifup, fp->netdev,
+ "creating ETH flow %u and binding SQ id %u\n", ethid, sqid);
+ rc = fun_eth_create(fp, ethid);
+ if (!rc) {
+ rc = fun_bind(fp->fdev, FUN_ADMIN_BIND_TYPE_EPSQ, sqid,
+ FUN_ADMIN_BIND_TYPE_ETH, ethid);
+ if (rc)
+ fun_res_destroy(fp->fdev, FUN_ADMIN_OP_ETH, 0, ethid);
+ }
+ return rc;
+}
+
+static void fun_irq_aff_notify(struct irq_affinity_notify *notify,
+ const cpumask_t *mask)
+{
+ struct fun_irq *p = container_of(notify, struct fun_irq, aff_notify);
+
+ cpumask_copy(&p->affinity_mask, mask);
+}
+
+static void fun_irq_aff_release(struct kref __always_unused *ref)
+{
+}
+
+static void fun_init_irq(struct fun_irq *p, int node, int idx)
+{
+ cpumask_set_cpu(cpumask_local_spread(idx, node), &p->affinity_mask);
+ p->aff_notify.notify = fun_irq_aff_notify;
+ p->aff_notify.release = fun_irq_aff_release;
+}
+
+static void fun_free_irqs_from(struct funeth_priv *fp, unsigned int start)
+{
+ struct fun_irq *p = fp->irqs + start;
+
+ for ( ; start < fp->num_irqs; start++, p++) {
+ netif_napi_del(&p->napi);
+ fun_release_irqs(fp->fdev, 1, &p->irq_idx);
+ }
+}
+
+/* Release the IRQ vectors reserved for Tx/Rx queues. */
+static void fun_free_queue_irqs(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+
+ if (fp->num_irqs) {
+ netif_info(fp, intr, dev, "Releasing %u queue IRQs\n",
+ fp->num_irqs);
+ fun_free_irqs_from(fp, 0);
+ kfree(fp->irqs);
+ fp->irqs = NULL;
+ fp->num_irqs = 0;
+ fp->num_tx_irqs = 0;
+ }
+}
+
+/* Reserve IRQ vectors, one per queue. We hold on to allocated vectors until
+ * the total number of queues changes.
+ */
+static int fun_alloc_queue_irqs(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ unsigned int i, copy, irqs_needed;
+ struct fun_irq *irqs, *p;
+ int node, res = -ENOMEM;
+ u16 *irq_idx;
+
+ irqs_needed = dev->real_num_rx_queues + dev->real_num_tx_queues;
+ if (irqs_needed == fp->num_irqs &&
+ fp->num_tx_irqs == dev->real_num_tx_queues)
+ return 0;
+
+ /* IRQ needs have changed, reallocate. */
+ irqs = kcalloc(irqs_needed, sizeof(*irqs), GFP_KERNEL);
+ if (!irqs)
+ return -ENOMEM;
+
+ irq_idx = kcalloc(irqs_needed, sizeof(u16), GFP_KERNEL);
+ if (!irq_idx)
+ goto free;
+
+ /* keep as many existing IRQs as possible */
+ copy = min(irqs_needed, fp->num_irqs);
+ for (i = 0; i < copy; i++)
+ irq_idx[i] = fp->irqs[i].irq_idx;
+
+ /* get additional IRQs */
+ if (irqs_needed > fp->num_irqs) {
+ unsigned int addl_irqs = irqs_needed - fp->num_irqs;
+
+ res = fun_reserve_irqs(fp->fdev, addl_irqs, irq_idx + copy);
+ if (res != addl_irqs)
+ goto free;
+ }
+
+ /* release excess IRQs */
+ fun_free_irqs_from(fp, copy);
+
+ for (i = 0; i < copy; i++)
+ netif_napi_del(&fp->irqs[i].napi);
+
+ /* new Tx IRQs */
+ copy = min(dev->real_num_tx_queues, fp->num_tx_irqs);
+ memcpy(irqs, fp->irqs, copy * sizeof(*p));
+
+ node = dev_to_node(&fp->pdev->dev);
+ for (p = irqs + copy, i = copy; i < dev->real_num_tx_queues; i++, p++)
+ fun_init_irq(p, node, i);
+
+ /* new Rx IRQs */
+ copy = min(dev->real_num_rx_queues, fp->num_irqs - fp->num_tx_irqs);
+ memcpy(p, fp->irqs + fp->num_tx_irqs, copy * sizeof(*p));
+ p += copy;
+
+ for (i = copy; i < dev->real_num_rx_queues; i++, p++)
+ fun_init_irq(p, node, i);
+
+ /* assign IRQ vectors and register NAPI */
+ for (i = 0; i < irqs_needed; i++) {
+ irqs[i].irq_idx = irq_idx[i];
+ irqs[i].irq = pci_irq_vector(fp->pdev, irq_idx[i]);
+ }
+
+ for (p = irqs, i = 0; i < dev->real_num_tx_queues; i++, p++)
+ netif_tx_napi_add(dev, &p->napi, fun_txq_napi_poll,
+ NAPI_POLL_WEIGHT);
+
+ for (i = 0; i < dev->real_num_rx_queues; i++, p++)
+ netif_napi_add(dev, &p->napi, fun_rxq_napi_poll,
+ NAPI_POLL_WEIGHT);
+
+ kfree(irq_idx);
+ kfree(fp->irqs);
+
+ fp->irqs = irqs;
+ fp->num_irqs = irqs_needed;
+ fp->num_tx_irqs = dev->real_num_tx_queues;
+ netif_info(fp, intr, dev, "Reserved %u IRQs for Tx/Rx queues\n",
+ irqs_needed);
+ return 0;
+
+free:
+ kfree(irq_idx);
+ kfree(irqs);
+ return res;
+}
+
+static irqreturn_t fun_queue_irq_handler(int irq, void *data)
+{
+ struct fun_irq *p = data;
+
+ if (p->rxq) {
+ prefetch(p->rxq->next_cqe_info);
+ p->rxq->irq_cnt++;
+ }
+ napi_schedule_irqoff(&p->napi);
+ return IRQ_HANDLED;
+}
+
+static int fun_enable_irqs(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ unsigned int i, qidx;
+ struct fun_irq *p;
+ const char *qtype;
+ int err;
+
+ for (p = fp->irqs, i = 0; i < fp->num_irqs; i++, p++) {
+ if (p->txq) {
+ qtype = "tx";
+ qidx = p->txq->qidx;
+ } else if (p->rxq) {
+ qtype = "rx";
+ qidx = p->rxq->qidx;
+ } else {
+ continue;
+ }
+
+ snprintf(p->name, sizeof(p->name) - 1, "%s-%s-%u", dev->name,
+ qtype, qidx);
+ err = request_irq(p->irq, fun_queue_irq_handler, 0, p->name, p);
+ if (err) {
+ netdev_err(dev, "Failed to allocate IRQ %u, err %d\n",
+ p->irq, err);
+ goto unroll;
+ }
+ }
+
+ for (p = fp->irqs, i = 0; i < fp->num_irqs; i++, p++) {
+ if (!p->txq && !p->rxq)
+ continue;
+ irq_set_affinity_notifier(p->irq, &p->aff_notify);
+ irq_set_affinity_hint(p->irq, &p->affinity_mask);
+ napi_enable(&p->napi);
+ }
+
+ return 0;
+
+unroll:
+ while (i--) {
+ p--;
+ free_irq(p->irq, p);
+ }
+ return err;
+}
+
+static void fun_disable_irqs(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct fun_irq *p;
+ unsigned int i;
+
+ for (p = fp->irqs, i = 0; i < fp->num_irqs; i++, p++) {
+ if (!p->txq && !p->rxq)
+ continue;
+
+ napi_disable(&p->napi);
+ irq_set_affinity_notifier(p->irq, NULL);
+ irq_set_affinity_hint(p->irq, NULL);
+ free_irq(p->irq, p);
+ }
+}
+
+static int funeth_open(struct net_device *netdev)
+{
+ static const int port_keys[] = {
+ FUN_ADMIN_PORT_KEY_STATS_DMA_LOW,
+ FUN_ADMIN_PORT_KEY_STATS_DMA_HIGH,
+ FUN_ADMIN_PORT_KEY_ENABLE
+ };
+
+ struct funeth_priv *fp = netdev_priv(netdev);
+ u64 vals[] = {
+ lower_32_bits(fp->stats_dma_addr),
+ upper_32_bits(fp->stats_dma_addr),
+ FUN_PORT_FLAG_ENABLE_NOTIFY
+ };
+ int rc;
+
+ rc = fun_alloc_queue_irqs(netdev);
+ if (rc)
+ return rc;
+
+ rc = fun_alloc_rings(netdev);
+ if (rc)
+ return rc;
+
+ rc = fun_vi_create(fp);
+ if (rc)
+ goto free_queues;
+
+ rc = fun_enable_irqs(netdev);
+ if (rc)
+ goto destroy_vi;
+
+ if (fp->rss_cfg) {
+ rc = fun_config_rss(netdev, fp->hash_algo, fp->rss_key,
+ fp->indir_table, FUN_ADMIN_SUBOP_CREATE);
+ } else {
+ struct funeth_rxq **rxqs = rtnl_dereference(fp->rxqs);
+
+ /* The non-RSS case has only 1 queue. */
+ rc = fun_bind(fp->fdev, FUN_ADMIN_BIND_TYPE_VI,
+ netdev->dev_port, FUN_ADMIN_BIND_TYPE_EPCQ,
+ rxqs[0]->hw_cqid);
+ }
+ if (rc)
+ goto disable_irqs;
+
+ rc = fun_port_write_cmds(fp, 3, port_keys, vals);
+ if (rc)
+ goto free_rss;
+
+ netif_tx_start_all_queues(netdev);
+ return 0;
+
+free_rss:
+ fun_destroy_rss(fp);
+disable_irqs:
+ fun_disable_irqs(netdev);
+destroy_vi:
+ fun_res_destroy(fp->fdev, FUN_ADMIN_OP_VI, 0, netdev->dev_port);
+free_queues:
+ fun_free_rings(netdev);
+ return rc;
+}
+
+static int funeth_close(struct net_device *netdev)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+
+ /* HW admin disable port */
+ fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_DISABLE, 0);
+
+ netif_carrier_off(netdev);
+ netif_tx_disable(netdev);
+
+ fun_destroy_rss(fp);
+ if (fp->txqs)
+ fun_res_destroy(fp->fdev, FUN_ADMIN_OP_VI, 0, netdev->dev_port);
+ fun_disable_irqs(netdev);
+ fun_free_rings(netdev);
+ return 0;
+}
+
+static void fun_get_stats64(struct net_device *netdev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+ struct funeth_rxq **rxqs;
+ unsigned int i, start;
+
+ stats->tx_packets = fp->tx_packets;
+ stats->tx_bytes = fp->tx_bytes;
+ stats->tx_dropped = fp->tx_dropped;
+
+ stats->rx_packets = fp->rx_packets;
+ stats->rx_bytes = fp->rx_bytes;
+ stats->rx_dropped = fp->rx_dropped;
+
+ rcu_read_lock();
+ rxqs = rcu_dereference(fp->rxqs);
+ if (!rxqs)
+ goto unlock;
+
+ for (i = 0; i < netdev->real_num_tx_queues; i++) {
+ struct funeth_txq_stats txs;
+
+ FUN_QSTAT_READ(fp->txqs[i], start, txs);
+ stats->tx_packets += txs.tx_pkts;
+ stats->tx_bytes += txs.tx_bytes;
+ stats->tx_dropped += txs.tx_map_err + txs.tx_len_err;
+ }
+
+ for (i = 0; i < fp->num_xdpqs; i++) {
+ struct funeth_txq_stats txs;
+
+ FUN_QSTAT_READ(fp->xdpqs[i], start, txs);
+ stats->tx_packets += txs.tx_pkts;
+ stats->tx_bytes += txs.tx_bytes;
+ }
+
+ for (i = 0; i < netdev->real_num_rx_queues; i++) {
+ struct funeth_rxq_stats rxs;
+
+ FUN_QSTAT_READ(rxqs[i], start, rxs);
+ stats->rx_packets += rxs.rx_pkts;
+ stats->rx_bytes += rxs.rx_bytes;
+ stats->rx_dropped += rxs.rx_map_err + rxs.rx_mem_drops;
+ }
+unlock:
+ rcu_read_unlock();
+}
+
+static int fun_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+ int rc;
+
+ rc = fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_MTU, new_mtu);
+ if (!rc)
+ netdev->mtu = new_mtu;
+ return rc;
+}
+
+static int fun_set_macaddr(struct net_device *netdev, void *addr)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+ struct sockaddr *saddr = addr;
+ int rc;
+
+ if (!is_valid_ether_addr(saddr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ if (ether_addr_equal(netdev->dev_addr, saddr->sa_data))
+ return 0;
+
+ rc = fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_MACADDR,
+ ether_addr_to_u64(saddr->sa_data));
+ if (!rc)
+ eth_hw_addr_set(netdev, saddr->sa_data);
+ return rc;
+}
+
+static int fun_get_port_attributes(struct net_device *netdev)
+{
+ static const int keys[] = {
+ FUN_ADMIN_PORT_KEY_MACADDR, FUN_ADMIN_PORT_KEY_CAPABILITIES,
+ FUN_ADMIN_PORT_KEY_ADVERT, FUN_ADMIN_PORT_KEY_MTU
+ };
+ static const int phys_keys[] = {
+ FUN_ADMIN_PORT_KEY_LANE_ATTRS,
+ };
+
+ struct funeth_priv *fp = netdev_priv(netdev);
+ u64 data[ARRAY_SIZE(keys)];
+ u8 mac[ETH_ALEN];
+ int i, rc;
+
+ rc = fun_port_read_cmds(fp, ARRAY_SIZE(keys), keys, data);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < ARRAY_SIZE(keys); i++) {
+ switch (keys[i]) {
+ case FUN_ADMIN_PORT_KEY_MACADDR:
+ u64_to_ether_addr(data[i], mac);
+ if (is_zero_ether_addr(mac)) {
+ eth_hw_addr_random(netdev);
+ } else if (is_valid_ether_addr(mac)) {
+ eth_hw_addr_set(netdev, mac);
+ } else {
+ netdev_err(netdev,
+ "device provided a bad MAC address %pM\n",
+ mac);
+ return -EINVAL;
+ }
+ break;
+
+ case FUN_ADMIN_PORT_KEY_CAPABILITIES:
+ fp->port_caps = data[i];
+ break;
+
+ case FUN_ADMIN_PORT_KEY_ADVERT:
+ fp->advertising = data[i];
+ break;
+
+ case FUN_ADMIN_PORT_KEY_MTU:
+ netdev->mtu = data[i];
+ break;
+ }
+ }
+
+ if (!(fp->port_caps & FUN_PORT_CAP_VPORT)) {
+ rc = fun_port_read_cmds(fp, ARRAY_SIZE(phys_keys), phys_keys,
+ data);
+ if (rc)
+ return rc;
+
+ fp->lane_attrs = data[0];
+ }
+
+ if (netdev->addr_assign_type == NET_ADDR_RANDOM)
+ return fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_MACADDR,
+ ether_addr_to_u64(netdev->dev_addr));
+ return 0;
+}
+
+static int fun_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
+{
+ const struct funeth_priv *fp = netdev_priv(dev);
+
+ return copy_to_user(ifr->ifr_data, &fp->hwtstamp_cfg,
+ sizeof(fp->hwtstamp_cfg)) ? -EFAULT : 0;
+}
+
+static int fun_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct hwtstamp_config cfg;
+
+ if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
+ return -EFAULT;
+
+ if (cfg.flags) /* flags is reserved, must be 0 */
+ return -EINVAL;
+
+ /* no TX HW timestamps */
+ cfg.tx_type = HWTSTAMP_TX_OFF;
+
+ switch (cfg.rx_filter) {
+ case HWTSTAMP_FILTER_NONE:
+ break;
+ case HWTSTAMP_FILTER_ALL:
+ case HWTSTAMP_FILTER_SOME:
+ case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+ case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+ case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+ case HWTSTAMP_FILTER_PTP_V2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+ case HWTSTAMP_FILTER_NTP_ALL:
+ cfg.rx_filter = HWTSTAMP_FILTER_ALL;
+ break;
+ default:
+ return -ERANGE;
+ }
+
+ fp->hwtstamp_cfg = cfg;
+ return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+}
+
+static int fun_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ switch (cmd) {
+ case SIOCSHWTSTAMP:
+ return fun_hwtstamp_set(dev, ifr);
+ case SIOCGHWTSTAMP:
+ return fun_hwtstamp_get(dev, ifr);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+#define XDP_MAX_MTU \
+ (PAGE_SIZE - FUN_XDP_HEADROOM - VLAN_ETH_HLEN - FUN_RX_TAILROOM)
+
+static int fun_xdp_setup(struct net_device *dev, struct netdev_bpf *xdp)
+{
+ struct bpf_prog *old_prog, *prog = xdp->prog;
+ struct funeth_priv *fp = netdev_priv(dev);
+ bool reconfig;
+ int rc, i;
+
+ /* XDP uses at most one buffer */
+ if (prog && dev->mtu > XDP_MAX_MTU) {
+ netdev_err(dev, "device MTU %u too large for XDP\n", dev->mtu);
+ NL_SET_ERR_MSG_MOD(xdp->extack,
+ "Device MTU too large for XDP");
+ return -EINVAL;
+ }
+
+ reconfig = netif_running(dev) && (!!fp->xdp_prog ^ !!prog);
+ if (reconfig) {
+ rc = funeth_close(dev);
+ if (rc) {
+ NL_SET_ERR_MSG_MOD(xdp->extack,
+ "Failed to reconfigure Rx queues.");
+ return rc;
+ }
+ }
+
+ dev->max_mtu = prog ? XDP_MAX_MTU : FUN_MAX_MTU;
+ fp->num_xdpqs = prog ? num_online_cpus() : 0;
+ old_prog = xchg(&fp->xdp_prog, prog);
+
+ if (reconfig) {
+ rc = funeth_open(dev);
+ if (rc) {
+ NL_SET_ERR_MSG_MOD(xdp->extack,
+ "Failed to reconfigure Rx queues.");
+ dev->max_mtu = old_prog ? XDP_MAX_MTU : FUN_MAX_MTU;
+ fp->num_xdpqs = old_prog ? num_online_cpus() : 0;
+ xchg(&fp->xdp_prog, old_prog);
+ return rc;
+ }
+ } else if (netif_running(dev)) {
+ struct funeth_rxq **rxqs = rtnl_dereference(fp->rxqs);
+
+ for (i = 0; i < dev->real_num_rx_queues; i++)
+ WRITE_ONCE(rxqs[i]->xdp_prog, prog);
+ }
+
+ if (old_prog)
+ bpf_prog_put(old_prog);
+ return 0;
+}
+
+static int fun_xdp(struct net_device *dev, struct netdev_bpf *xdp)
+{
+ switch (xdp->command) {
+ case XDP_SETUP_PROG:
+ return fun_xdp_setup(dev, xdp);
+ default:
+ return -EINVAL;
+ }
+}
+
+static struct devlink_port *fun_get_devlink_port(struct net_device *netdev)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+
+ return &fp->dl_port;
+}
+
+static int fun_init_vports(struct fun_ethdev *ed, unsigned int n)
+{
+ if (ed->num_vports)
+ return -EINVAL;
+
+ ed->vport_info = kvcalloc(n, sizeof(*ed->vport_info), GFP_KERNEL);
+ if (!ed->vport_info)
+ return -ENOMEM;
+ ed->num_vports = n;
+ return 0;
+}
+
+static void fun_free_vports(struct fun_ethdev *ed)
+{
+ kvfree(ed->vport_info);
+ ed->vport_info = NULL;
+ ed->num_vports = 0;
+}
+
+static struct fun_vport_info *fun_get_vport(struct fun_dev *fdev,
+ unsigned int vport)
+{
+ struct fun_ethdev *ed = to_fun_ethdev(fdev);
+
+ if (!ed->vport_info || vport >= ed->num_vports)
+ return NULL;
+
+ return ed->vport_info + vport;
+}
+
+static int fun_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct fun_dev *fdev = fp->fdev;
+ struct fun_vport_info *vi = fun_get_vport(fdev, vf);
+ struct fun_adi_param mac_param = {};
+ int rc;
+
+ if (!vi)
+ return -EINVAL;
+ if (is_multicast_ether_addr(mac))
+ return -EINVAL;
+
+ mac_param.u.mac = FUN_ADI_MAC_INIT(ether_addr_to_u64(mac));
+ rc = fun_adi_write(fdev, FUN_ADMIN_ADI_ATTR_MACADDR, vf + 1,
+ &mac_param);
+ if (!rc)
+ ether_addr_copy(vi->mac, mac);
+ return rc;
+}
+
+static int fun_set_vf_vlan(struct net_device *dev, int vf, u16 vlan, u8 qos,
+ __be16 vlan_proto)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct fun_dev *fdev = fp->fdev;
+ struct fun_vport_info *vi = fun_get_vport(fdev, vf);
+ struct fun_adi_param vlan_param = {};
+ int rc;
+
+ if (!vi)
+ return -EINVAL;
+ if (vlan > 4095 || qos > 7)
+ return -EINVAL;
+ if (vlan_proto && vlan_proto != htons(ETH_P_8021Q) &&
+ vlan_proto != htons(ETH_P_8021AD))
+ return -EINVAL;
+
+ vlan_param.u.vlan = FUN_ADI_VLAN_INIT(be16_to_cpu(vlan_proto),
+ ((u16)qos << VLAN_PRIO_SHIFT) | vlan);
+ rc = fun_adi_write(fdev, FUN_ADMIN_ADI_ATTR_VLAN, vf + 1, &vlan_param);
+ if (rc)
+ return rc;
+
+ vi->vlan = vlan;
+ vi->qos = qos;
+ vi->vlan_proto = vlan_proto;
+ return 0;
+}
+
+static int fun_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
+ int max_tx_rate)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct fun_dev *fdev = fp->fdev;
+ struct fun_vport_info *vi = fun_get_vport(fdev, vf);
+ struct fun_adi_param rate_param = {};
+ int rc;
+
+ if (!vi || min_tx_rate)
+ return -EINVAL;
+
+ rate_param.u.rate = FUN_ADI_RATE_INIT(max_tx_rate);
+ rc = fun_adi_write(fdev, FUN_ADMIN_ADI_ATTR_RATE, vf + 1, &rate_param);
+ if (rc)
+ return rc;
+
+ vi->max_rate = max_tx_rate;
+ return 0;
+}
+
+static int fun_get_vf_config(struct net_device *dev, int vf,
+ struct ifla_vf_info *ivi)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ struct fun_dev *fdev = fp->fdev;
+ const struct fun_vport_info *vi = fun_get_vport(fdev, vf);
+
+ if (!vi)
+ return -EINVAL;
+
+ memset(ivi, 0, sizeof(*ivi));
+ ivi->vf = vf;
+ ether_addr_copy(ivi->mac, vi->mac);
+ ivi->vlan = vi->vlan;
+ ivi->qos = vi->qos;
+ ivi->vlan_proto = vi->vlan_proto;
+ ivi->max_tx_rate = vi->max_rate;
+ ivi->spoofchk = vi->spoofchk;
+ return 0;
+}
+
+static const struct net_device_ops fun_netdev_ops = {
+ .ndo_open = funeth_open,
+ .ndo_stop = funeth_close,
+ .ndo_start_xmit = fun_start_xmit,
+ .ndo_get_stats64 = fun_get_stats64,
+ .ndo_change_mtu = fun_change_mtu,
+ .ndo_set_mac_address = fun_set_macaddr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = fun_ioctl,
+ .ndo_uninit = fun_free_queue_irqs,
+ .ndo_bpf = fun_xdp,
+ .ndo_xdp_xmit = fun_xdp_xmit_frames,
+ .ndo_set_vf_mac = fun_set_vf_mac,
+ .ndo_set_vf_vlan = fun_set_vf_vlan,
+ .ndo_set_vf_rate = fun_set_vf_rate,
+ .ndo_get_vf_config = fun_get_vf_config,
+ .ndo_get_devlink_port = fun_get_devlink_port,
+};
+
+#define GSO_ENCAP_FLAGS (NETIF_F_GSO_GRE | NETIF_F_GSO_IPXIP4 | \
+ NETIF_F_GSO_IPXIP6 | NETIF_F_GSO_UDP_TUNNEL | \
+ NETIF_F_GSO_UDP_TUNNEL_CSUM)
+#define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
+#define VLAN_FEAT (NETIF_F_SG | NETIF_F_HW_CSUM | TSO_FLAGS | \
+ GSO_ENCAP_FLAGS | NETIF_F_HIGHDMA)
+
+static void fun_dflt_rss_indir(struct funeth_priv *fp, unsigned int nrx)
+{
+ unsigned int i;
+
+ for (i = 0; i < fp->indir_table_nentries; i++)
+ fp->indir_table[i] = ethtool_rxfh_indir_default(i, nrx);
+}
+
+/* Reset the RSS indirection table to equal distribution across the current
+ * number of Rx queues. Called at init time and whenever the number of Rx
+ * queues changes subsequently. Note that this may also resize the indirection
+ * table.
+ */
+void fun_reset_rss_indir(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+
+ if (!fp->rss_cfg)
+ return;
+
+ /* Set the table size to the max possible that allows an equal number
+ * of occurrences of each CQ.
+ */
+ fp->indir_table_nentries = rounddown(FUN_ETH_RSS_MAX_INDIR_ENT,
+ dev->real_num_rx_queues);
+ fun_dflt_rss_indir(fp, dev->real_num_rx_queues);
+}
+
+/* Allocate the DMA area for the RSS configuration commands to the device, and
+ * initialize the hash, hash key, indirection table size and its entries to
+ * their defaults. The indirection table defaults to equal distribution across
+ * the Rx queues.
+ */
+static int fun_init_rss(struct net_device *dev)
+{
+ struct funeth_priv *fp = netdev_priv(dev);
+ size_t size = sizeof(fp->rss_key) + sizeof(fp->indir_table);
+
+ fp->rss_hw_id = FUN_HCI_ID_INVALID;
+ if (!(fp->port_caps & FUN_PORT_CAP_OFFLOADS))
+ return 0;
+
+ fp->rss_cfg = dma_alloc_coherent(&fp->pdev->dev, size,
+ &fp->rss_dma_addr, GFP_KERNEL);
+ if (!fp->rss_cfg)
+ return -ENOMEM;
+
+ fp->hash_algo = FUN_ETH_RSS_ALG_TOEPLITZ;
+ netdev_rss_key_fill(fp->rss_key, sizeof(fp->rss_key));
+ fun_reset_rss_indir(dev);
+ return 0;
+}
+
+static void fun_free_rss(struct funeth_priv *fp)
+{
+ if (fp->rss_cfg) {
+ dma_free_coherent(&fp->pdev->dev,
+ sizeof(fp->rss_key) + sizeof(fp->indir_table),
+ fp->rss_cfg, fp->rss_dma_addr);
+ fp->rss_cfg = NULL;
+ }
+}
+
+static int fun_init_stats_area(struct funeth_priv *fp)
+{
+ unsigned int nstats;
+
+ if (!(fp->port_caps & FUN_PORT_CAP_STATS))
+ return 0;
+
+ nstats = PORT_MAC_RX_STATS_MAX + PORT_MAC_TX_STATS_MAX +
+ PORT_MAC_FEC_STATS_MAX;
+
+ fp->stats = dma_alloc_coherent(&fp->pdev->dev, nstats * sizeof(u64),
+ &fp->stats_dma_addr, GFP_KERNEL);
+ if (!fp->stats)
+ return -ENOMEM;
+ return 0;
+}
+
+static void fun_free_stats_area(struct funeth_priv *fp)
+{
+ unsigned int nstats;
+
+ if (fp->stats) {
+ nstats = PORT_MAC_RX_STATS_MAX + PORT_MAC_TX_STATS_MAX;
+ dma_free_coherent(&fp->pdev->dev, nstats * sizeof(u64),
+ fp->stats, fp->stats_dma_addr);
+ fp->stats = NULL;
+ }
+}
+
+static int fun_dl_port_register(struct net_device *netdev)
+{
+ struct funeth_priv *fp = netdev_priv(netdev);
+ struct devlink *dl = priv_to_devlink(fp->fdev);
+ struct devlink_port_attrs attrs = {};
+ unsigned int idx;
+
+ if (fp->port_caps & FUN_PORT_CAP_VPORT) {
+ attrs.flavour = DEVLINK_PORT_FLAVOUR_VIRTUAL;
+ idx = fp->lport;
+ } else {
+ idx = netdev->dev_port;
+ attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
+ attrs.lanes = fp->lane_attrs & 7;
+ if (fp->lane_attrs & FUN_PORT_LANE_SPLIT) {
+ attrs.split = 1;
+ attrs.phys.port_number = fp->lport & ~3;
+ attrs.phys.split_subport_number = fp->lport & 3;
+ } else {
+ attrs.phys.port_number = fp->lport;
+ }
+ }
+
+ devlink_port_attrs_set(&fp->dl_port, &attrs);
+
+ return devlink_port_register(dl, &fp->dl_port, idx);
+}
+
+/* Determine the max Tx/Rx queues for a port. */
+static int fun_max_qs(struct fun_ethdev *ed, unsigned int *ntx,
+ unsigned int *nrx)
+{
+ int neth;
+
+ if (ed->num_ports > 1 || is_kdump_kernel()) {
+ *ntx = 1;
+ *nrx = 1;
+ return 0;
+ }
+
+ neth = fun_get_res_count(&ed->fdev, FUN_ADMIN_OP_ETH);
+ if (neth < 0)
+ return neth;
+
+ /* We determine the max number of queues based on the CPU
+ * cores, device interrupts and queues, RSS size, and device Tx flows.
+ *
+ * - At least 1 Rx and 1 Tx queues.
+ * - At most 1 Rx/Tx queue per core.
+ * - Each Rx/Tx queue needs 1 SQ.
+ */
+ *ntx = min(ed->nsqs_per_port - 1, num_online_cpus());
+ *nrx = *ntx;
+ if (*ntx > neth)
+ *ntx = neth;
+ if (*nrx > FUN_ETH_RSS_MAX_INDIR_ENT)
+ *nrx = FUN_ETH_RSS_MAX_INDIR_ENT;
+ return 0;
+}
+
+static void fun_queue_defaults(struct net_device *dev, unsigned int nsqs)
+{
+ unsigned int ntx, nrx;
+
+ ntx = min(dev->num_tx_queues, FUN_DFLT_QUEUES);
+ nrx = min(dev->num_rx_queues, FUN_DFLT_QUEUES);
+ if (ntx <= nrx) {
+ ntx = min(ntx, nsqs / 2);
+ nrx = min(nrx, nsqs - ntx);
+ } else {
+ nrx = min(nrx, nsqs / 2);
+ ntx = min(ntx, nsqs - nrx);
+ }
+
+ netif_set_real_num_tx_queues(dev, ntx);
+ netif_set_real_num_rx_queues(dev, nrx);
+}
+
+static int fun_create_netdev(struct fun_ethdev *ed, unsigned int portid)
+{
+ struct fun_dev *fdev = &ed->fdev;
+ struct net_device *netdev;
+ unsigned int ntx, nrx;
+ struct funeth_priv *fp;
+ int rc;
+
+ rc = fun_max_qs(ed, &ntx, &nrx);
+ if (rc)
+ return rc;
+
+ netdev = alloc_etherdev_mqs(sizeof(*fp), ntx, nrx);
+ if (!netdev) {
+ rc = -ENOMEM;
+ goto done;
+ }
+
+ netdev->dev_port = portid;
+ fun_queue_defaults(netdev, ed->nsqs_per_port);
+
+ fp = netdev_priv(netdev);
+ fp->fdev = fdev;
+ fp->pdev = to_pci_dev(fdev->dev);
+ fp->netdev = netdev;
+ fp->ethid_start = portid;
+ seqcount_init(&fp->link_seq);
+
+ fp->lport = INVALID_LPORT;
+ rc = fun_port_create(netdev);
+ if (rc)
+ goto free_netdev;
+
+ /* bind port to admin CQ for async events */
+ rc = fun_bind(fdev, FUN_ADMIN_BIND_TYPE_PORT, portid,
+ FUN_ADMIN_BIND_TYPE_EPCQ, 0);
+ if (rc)
+ goto destroy_port;
+
+ rc = fun_get_port_attributes(netdev);
+ if (rc)
+ goto destroy_port;
+
+ rc = fun_init_rss(netdev);
+ if (rc)
+ goto destroy_port;
+
+ rc = fun_init_stats_area(fp);
+ if (rc)
+ goto free_rss;
+
+ SET_NETDEV_DEV(netdev, fdev->dev);
+ netdev->netdev_ops = &fun_netdev_ops;
+
+ netdev->hw_features = NETIF_F_SG | NETIF_F_RXHASH | NETIF_F_RXCSUM;
+ if (fp->port_caps & FUN_PORT_CAP_OFFLOADS)
+ netdev->hw_features |= NETIF_F_HW_CSUM | TSO_FLAGS;
+ if (fp->port_caps & FUN_PORT_CAP_ENCAP_OFFLOADS)
+ netdev->hw_features |= GSO_ENCAP_FLAGS;
+
+ netdev->features |= netdev->hw_features | NETIF_F_HIGHDMA;
+ netdev->vlan_features = netdev->features & VLAN_FEAT;
+ netdev->mpls_features = netdev->vlan_features;
+ netdev->hw_enc_features = netdev->hw_features;
+
+ netdev->min_mtu = ETH_MIN_MTU;
+ netdev->max_mtu = FUN_MAX_MTU;
+
+ fun_set_ethtool_ops(netdev);
+
+ /* configurable parameters */
+ fp->sq_depth = min(SQ_DEPTH, fdev->q_depth);
+ fp->cq_depth = min(CQ_DEPTH, fdev->q_depth);
+ fp->rq_depth = min_t(unsigned int, RQ_DEPTH, fdev->q_depth);
+ fp->rx_coal_usec = CQ_INTCOAL_USEC;
+ fp->rx_coal_count = CQ_INTCOAL_NPKT;
+ fp->tx_coal_usec = SQ_INTCOAL_USEC;
+ fp->tx_coal_count = SQ_INTCOAL_NPKT;
+ fp->cq_irq_db = FUN_IRQ_CQ_DB(fp->rx_coal_usec, fp->rx_coal_count);
+
+ rc = fun_dl_port_register(netdev);
+ if (rc)
+ goto free_stats;
+
+ fp->ktls_id = FUN_HCI_ID_INVALID;
+ fun_ktls_init(netdev); /* optional, failure OK */
+
+ netif_carrier_off(netdev);
+ ed->netdevs[portid] = netdev;
+ rc = register_netdev(netdev);
+ if (rc)
+ goto unreg_devlink;
+
+ if (fp->dl_port.devlink)
+ devlink_port_type_eth_set(&fp->dl_port, netdev);
+
+ return 0;
+
+unreg_devlink:
+ ed->netdevs[portid] = NULL;
+ fun_ktls_cleanup(fp);
+ if (fp->dl_port.devlink)
+ devlink_port_unregister(&fp->dl_port);
+free_stats:
+ fun_free_stats_area(fp);
+free_rss:
+ fun_free_rss(fp);
+destroy_port:
+ fun_port_destroy(netdev);
+free_netdev:
+ free_netdev(netdev);
+done:
+ dev_err(fdev->dev, "couldn't allocate port %u, error %d", portid, rc);
+ return rc;
+}
+
+static void fun_destroy_netdev(struct net_device *netdev)
+{
+ if (likely(netdev)) {
+ struct funeth_priv *fp = netdev_priv(netdev);
+
+ if (fp->dl_port.devlink) {
+ devlink_port_type_clear(&fp->dl_port);
+ devlink_port_unregister(&fp->dl_port);
+ }
+ unregister_netdev(netdev);
+ fun_ktls_cleanup(fp);
+ fun_free_stats_area(fp);
+ fun_free_rss(fp);
+ fun_port_destroy(netdev);
+ free_netdev(netdev);
+ }
+}
+
+static int fun_create_ports(struct fun_ethdev *ed, unsigned int nports)
+{
+ struct fun_dev *fd = &ed->fdev;
+ int i, rc;
+
+ /* The admin queue takes 1 IRQ and 2 SQs. */
+ ed->nsqs_per_port = min(fd->num_irqs - 1,
+ fd->kern_end_qid - 2) / nports;
+ if (ed->nsqs_per_port < 2) {
+ dev_err(fd->dev, "Too few SQs for %u ports", nports);
+ return -EINVAL;
+ }
+
+ ed->netdevs = kcalloc(nports, sizeof(*ed->netdevs), GFP_KERNEL);
+ if (!ed->netdevs)
+ return -ENOMEM;
+
+ ed->num_ports = nports;
+ for (i = 0; i < nports; i++) {
+ rc = fun_create_netdev(ed, i);
+ if (rc)
+ goto free_netdevs;
+ }
+
+ return 0;
+
+free_netdevs:
+ while (i)
+ fun_destroy_netdev(ed->netdevs[--i]);
+ kfree(ed->netdevs);
+ ed->netdevs = NULL;
+ ed->num_ports = 0;
+ return rc;
+}
+
+static void fun_destroy_ports(struct fun_ethdev *ed)
+{
+ unsigned int i;
+
+ for (i = 0; i < ed->num_ports; i++)
+ fun_destroy_netdev(ed->netdevs[i]);
+
+ kfree(ed->netdevs);
+ ed->netdevs = NULL;
+ ed->num_ports = 0;
+}
+
+static void fun_update_link_state(const struct fun_ethdev *ed,
+ const struct fun_admin_port_notif *notif)
+{
+ unsigned int port_idx = be16_to_cpu(notif->id);
+ struct net_device *netdev;
+ struct funeth_priv *fp;
+
+ if (port_idx >= ed->num_ports)
+ return;
+
+ netdev = ed->netdevs[port_idx];
+ fp = netdev_priv(netdev);
+
+ write_seqcount_begin(&fp->link_seq);
+ fp->link_speed = be32_to_cpu(notif->speed) * 10; /* 10 Mbps->Mbps */
+ fp->active_fc = notif->flow_ctrl;
+ fp->active_fec = notif->fec;
+ fp->xcvr_type = notif->xcvr_type;
+ fp->link_down_reason = notif->link_down_reason;
+ fp->lp_advertising = be64_to_cpu(notif->lp_advertising);
+
+ if ((notif->link_state | notif->missed_events) & FUN_PORT_FLAG_MAC_DOWN)
+ netif_carrier_off(netdev);
+ if (notif->link_state & FUN_PORT_FLAG_NH_DOWN)
+ netif_dormant_on(netdev);
+ if (notif->link_state & FUN_PORT_FLAG_NH_UP)
+ netif_dormant_off(netdev);
+ if (notif->link_state & FUN_PORT_FLAG_MAC_UP)
+ netif_carrier_on(netdev);
+
+ write_seqcount_end(&fp->link_seq);
+ fun_report_link(netdev);
+}
+
+/* handler for async events delivered through the admin CQ */
+static void fun_event_cb(struct fun_dev *fdev, void *entry)
+{
+ u8 op = ((struct fun_admin_rsp_common *)entry)->op;
+
+ if (op == FUN_ADMIN_OP_PORT) {
+ const struct fun_admin_port_notif *rsp = entry;
+
+ if (rsp->subop == FUN_ADMIN_SUBOP_NOTIFY) {
+ fun_update_link_state(to_fun_ethdev(fdev), rsp);
+ } else if (rsp->subop == FUN_ADMIN_SUBOP_RES_COUNT) {
+ const struct fun_admin_res_count_rsp *r = entry;
+
+ if (r->count.data)
+ set_bit(FUN_SERV_RES_CHANGE, &fdev->service_flags);
+ else
+ set_bit(FUN_SERV_DEL_PORTS, &fdev->service_flags);
+ fun_serv_sched(fdev);
+ } else {
+ dev_info(fdev->dev, "adminq event unexpected op %u subop %u",
+ op, rsp->subop);
+ }
+ } else {
+ dev_info(fdev->dev, "adminq event unexpected op %u", op);
+ }
+}
+
+/* handler for pending work managed by the service task */
+static void fun_service_cb(struct fun_dev *fdev)
+{
+ struct fun_ethdev *ed = to_fun_ethdev(fdev);
+ int rc;
+
+ if (test_and_clear_bit(FUN_SERV_DEL_PORTS, &fdev->service_flags))
+ fun_destroy_ports(ed);
+
+ if (!test_and_clear_bit(FUN_SERV_RES_CHANGE, &fdev->service_flags))
+ return;
+
+ rc = fun_get_res_count(fdev, FUN_ADMIN_OP_PORT);
+ if (rc < 0 || rc == ed->num_ports)
+ return;
+
+ if (ed->num_ports)
+ fun_destroy_ports(ed);
+ if (rc)
+ fun_create_ports(ed, rc);
+}
+
+static int funeth_sriov_configure(struct pci_dev *pdev, int nvfs)
+{
+ struct fun_dev *fdev = pci_get_drvdata(pdev);
+ struct fun_ethdev *ed = to_fun_ethdev(fdev);
+ int rc;
+
+ if (nvfs == 0) {
+ if (pci_vfs_assigned(pdev)) {
+ dev_warn(&pdev->dev,
+ "Cannot disable SR-IOV while VFs are assigned\n");
+ return -EPERM;
+ }
+
+ pci_disable_sriov(pdev);
+ fun_free_vports(ed);
+ return 0;
+ }
+
+ rc = fun_init_vports(ed, nvfs);
+ if (rc)
+ return rc;
+
+ rc = pci_enable_sriov(pdev, nvfs);
+ if (rc) {
+ fun_free_vports(ed);
+ return rc;
+ }
+
+ return nvfs;
+}
+
+static int funeth_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct devlink *devlink;
+ struct fun_ethdev *ed;
+ struct fun_dev *fdev;
+ int rc;
+
+ struct fun_dev_params aqreq = {
+ .cqe_size_log2 = ilog2(ADMIN_CQE_SIZE),
+ .sqe_size_log2 = ilog2(ADMIN_SQE_SIZE),
+ .cq_depth = ADMIN_CQ_DEPTH,
+ .sq_depth = ADMIN_SQ_DEPTH,
+ .rq_depth = ADMIN_RQ_DEPTH,
+ .min_msix = 2, /* 1 Rx + 1 Tx */
+ .event_cb = fun_event_cb,
+ .serv_cb = fun_service_cb,
+ };
+
+ devlink = fun_devlink_alloc(&pdev->dev);
+ if (!devlink) {
+ dev_err(&pdev->dev, "devlink alloc failed\n");
+ return -ENOMEM;
+ }
+
+ ed = devlink_priv(devlink);
+
+ fdev = &ed->fdev;
+ rc = fun_dev_enable(fdev, pdev, &aqreq, KBUILD_MODNAME);
+ if (rc)
+ goto free_devlink;
+
+ rc = fun_get_res_count(fdev, FUN_ADMIN_OP_PORT);
+ if (rc > 0)
+ rc = fun_create_ports(ed, rc);
+ if (rc < 0)
+ goto disable_dev;
+
+ fun_serv_restart(fdev);
+ fun_devlink_register(devlink);
+ return 0;
+
+disable_dev:
+ fun_dev_disable(fdev);
+free_devlink:
+ fun_devlink_free(devlink);
+ return rc;
+}
+
+static void __funeth_remove(struct pci_dev *pdev)
+{
+ struct fun_dev *fdev = pci_get_drvdata(pdev);
+ struct devlink *devlink;
+ struct fun_ethdev *ed;
+
+ if (!fdev)
+ return;
+
+ ed = to_fun_ethdev(fdev);
+ devlink = priv_to_devlink(ed);
+ fun_devlink_unregister(devlink);
+
+#ifdef CONFIG_PCI_IOV
+ funeth_sriov_configure(pdev, 0);
+#endif
+
+ fun_serv_stop(fdev);
+ fun_destroy_ports(ed);
+ fun_dev_disable(fdev);
+
+ fun_devlink_free(devlink);
+}
+
+static void funeth_remove(struct pci_dev *pdev)
+{
+ __funeth_remove(pdev);
+}
+
+static void funeth_shutdown(struct pci_dev *pdev)
+{
+ __funeth_remove(pdev);
+}
+
+static struct pci_driver funeth_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = funeth_id_table,
+ .probe = funeth_probe,
+ .remove = funeth_remove,
+ .shutdown = funeth_shutdown,
+ .sriov_configure = funeth_sriov_configure,
+};
+
+static int __init funeth_init(void)
+{
+ int ret;
+
+ ret = pci_register_driver(&funeth_driver);
+ if (ret) {
+ pr_err("%s pci_register_driver failed ret %d\n",
+ KBUILD_MODNAME, ret);
+ }
+ return ret;
+}
+
+static void __exit funeth_exit(void)
+{
+ pci_unregister_driver(&funeth_driver);
+}
+
+module_init(funeth_init);
+module_exit(funeth_exit);
+
+MODULE_AUTHOR("Dimitris Michailidis <dmichail@...gible.com>");
+MODULE_DESCRIPTION("Fungible Ethernet Network Driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DEVICE_TABLE(pci, funeth_id_table);
--
2.25.1
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