diff options
Diffstat (limited to 'drivers/net/ethernet/fungible/funeth/funeth_main.c')
| -rw-r--r-- | drivers/net/ethernet/fungible/funeth/funeth_main.c | 2086 |
1 files changed, 2086 insertions, 0 deletions
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 000000000..095f51c4d --- /dev/null +++ b/drivers/net/ethernet/fungible/funeth/funeth_main.c @@ -0,0 +1,2086 @@ +// 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\n", + speed, unit, pause, fec); + } 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); + union { + struct { + struct fun_admin_rss_req req; + struct fun_dataop_gl gl; + }; + struct fun_admin_generic_create_rsp rsp; + } cmd; + __be32 *indir_tab; + u16 flags; + int rc; + + 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 void fun_destroy_rss(struct funeth_priv *fp) +{ + if (fp->rss_hw_id != FUN_HCI_ID_INVALID) { + fun_res_destroy(fp->fdev, FUN_ADMIN_OP_RSS, 0, fp->rss_hw_id); + fp->rss_hw_id = FUN_HCI_ID_INVALID; + } +} + +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) +{ +} + +/* Allocate an IRQ structure, assign an MSI-X index and initial affinity to it, + * and add it to the IRQ XArray. + */ +static struct fun_irq *fun_alloc_qirq(struct funeth_priv *fp, unsigned int idx, + int node, unsigned int xa_idx_offset) +{ + struct fun_irq *irq; + int cpu, res; + + cpu = cpumask_local_spread(idx, node); + node = cpu_to_mem(cpu); + + irq = kzalloc_node(sizeof(*irq), GFP_KERNEL, node); + if (!irq) + return ERR_PTR(-ENOMEM); + + res = fun_reserve_irqs(fp->fdev, 1, &irq->irq_idx); + if (res != 1) + goto free_irq; + + res = xa_insert(&fp->irqs, idx + xa_idx_offset, irq, GFP_KERNEL); + if (res) + goto release_irq; + + irq->irq = pci_irq_vector(fp->pdev, irq->irq_idx); + cpumask_set_cpu(cpu, &irq->affinity_mask); + irq->aff_notify.notify = fun_irq_aff_notify; + irq->aff_notify.release = fun_irq_aff_release; + irq->state = FUN_IRQ_INIT; + return irq; + +release_irq: + fun_release_irqs(fp->fdev, 1, &irq->irq_idx); +free_irq: + kfree(irq); + return ERR_PTR(res); +} + +static void fun_free_qirq(struct funeth_priv *fp, struct fun_irq *irq) +{ + netif_napi_del(&irq->napi); + fun_release_irqs(fp->fdev, 1, &irq->irq_idx); + kfree(irq); +} + +/* Release the IRQs reserved for Tx/Rx queues that aren't being used. */ +static void fun_prune_queue_irqs(struct net_device *dev) +{ + struct funeth_priv *fp = netdev_priv(dev); + unsigned int nreleased = 0; + struct fun_irq *irq; + unsigned long idx; + + xa_for_each(&fp->irqs, idx, irq) { + if (irq->txq || irq->rxq) /* skip those in use */ + continue; + + xa_erase(&fp->irqs, idx); + fun_free_qirq(fp, irq); + nreleased++; + if (idx < fp->rx_irq_ofst) + fp->num_tx_irqs--; + else + fp->num_rx_irqs--; + } + netif_info(fp, intr, dev, "Released %u queue IRQs\n", nreleased); +} + +/* Reserve IRQs, one per queue, to acommodate the requested queue numbers @ntx + * and @nrx. IRQs are added incrementally to those we already have. + * We hold on to allocated IRQs until garbage collection of unused IRQs is + * separately requested. + */ +static int fun_alloc_queue_irqs(struct net_device *dev, unsigned int ntx, + unsigned int nrx) +{ + struct funeth_priv *fp = netdev_priv(dev); + int node = dev_to_node(&fp->pdev->dev); + struct fun_irq *irq; + unsigned int i; + + for (i = fp->num_tx_irqs; i < ntx; i++) { + irq = fun_alloc_qirq(fp, i, node, 0); + if (IS_ERR(irq)) + return PTR_ERR(irq); + + fp->num_tx_irqs++; + netif_napi_add_tx(dev, &irq->napi, fun_txq_napi_poll); + } + + for (i = fp->num_rx_irqs; i < nrx; i++) { + irq = fun_alloc_qirq(fp, i, node, fp->rx_irq_ofst); + if (IS_ERR(irq)) + return PTR_ERR(irq); + + fp->num_rx_irqs++; + netif_napi_add(dev, &irq->napi, fun_rxq_napi_poll); + } + + netif_info(fp, intr, dev, "Reserved %u/%u IRQs for Tx/Rx queues\n", + ntx, nrx); + return 0; +} + +static void free_txqs(struct funeth_txq **txqs, unsigned int nqs, + unsigned int start, int state) +{ + unsigned int i; + + for (i = start; i < nqs && txqs[i]; i++) + txqs[i] = funeth_txq_free(txqs[i], state); +} + +static int alloc_txqs(struct net_device *dev, struct funeth_txq **txqs, + unsigned int nqs, unsigned int depth, unsigned int start, + int state) +{ + struct funeth_priv *fp = netdev_priv(dev); + unsigned int i; + int err; + + for (i = start; i < nqs; i++) { + err = funeth_txq_create(dev, i, depth, xa_load(&fp->irqs, i), + state, &txqs[i]); + if (err) { + free_txqs(txqs, nqs, start, FUN_QSTATE_DESTROYED); + return err; + } + } + return 0; +} + +static void free_rxqs(struct funeth_rxq **rxqs, unsigned int nqs, + unsigned int start, int state) +{ + unsigned int i; + + for (i = start; i < nqs && rxqs[i]; i++) + rxqs[i] = funeth_rxq_free(rxqs[i], state); +} + +static int alloc_rxqs(struct net_device *dev, struct funeth_rxq **rxqs, + unsigned int nqs, unsigned int ncqe, unsigned int nrqe, + unsigned int start, int state) +{ + struct funeth_priv *fp = netdev_priv(dev); + unsigned int i; + int err; + + for (i = start; i < nqs; i++) { + err = funeth_rxq_create(dev, i, ncqe, nrqe, + xa_load(&fp->irqs, i + fp->rx_irq_ofst), + state, &rxqs[i]); + if (err) { + free_rxqs(rxqs, nqs, start, FUN_QSTATE_DESTROYED); + return err; + } + } + return 0; +} + +static void free_xdpqs(struct funeth_txq **xdpqs, unsigned int nqs, + unsigned int start, int state) +{ + unsigned int i; + + for (i = start; i < nqs && xdpqs[i]; i++) + xdpqs[i] = funeth_txq_free(xdpqs[i], state); + + if (state == FUN_QSTATE_DESTROYED) + kfree(xdpqs); +} + +static struct funeth_txq **alloc_xdpqs(struct net_device *dev, unsigned int nqs, + unsigned int depth, unsigned int start, + int state) +{ + struct funeth_txq **xdpqs; + unsigned int i; + int err; + + xdpqs = kcalloc(nqs, sizeof(*xdpqs), GFP_KERNEL); + if (!xdpqs) + return ERR_PTR(-ENOMEM); + + for (i = start; i < nqs; i++) { + err = funeth_txq_create(dev, i, depth, NULL, state, &xdpqs[i]); + if (err) { + free_xdpqs(xdpqs, nqs, start, FUN_QSTATE_DESTROYED); + return ERR_PTR(err); + } + } + return xdpqs; +} + +static void fun_free_rings(struct net_device *netdev, struct fun_qset *qset) +{ + struct funeth_priv *fp = netdev_priv(netdev); + struct funeth_txq **xdpqs = qset->xdpqs; + struct funeth_rxq **rxqs = qset->rxqs; + + /* qset may not specify any queues to operate on. In that case the + * currently installed queues are implied. + */ + if (!rxqs) { + rxqs = rtnl_dereference(fp->rxqs); + xdpqs = rtnl_dereference(fp->xdpqs); + qset->txqs = fp->txqs; + qset->nrxqs = netdev->real_num_rx_queues; + qset->ntxqs = netdev->real_num_tx_queues; + qset->nxdpqs = fp->num_xdpqs; + } + if (!rxqs) + return; + + if (rxqs == rtnl_dereference(fp->rxqs)) { + rcu_assign_pointer(fp->rxqs, NULL); + rcu_assign_pointer(fp->xdpqs, NULL); + synchronize_net(); + fp->txqs = NULL; + } + + free_rxqs(rxqs, qset->nrxqs, qset->rxq_start, qset->state); + free_txqs(qset->txqs, qset->ntxqs, qset->txq_start, qset->state); + free_xdpqs(xdpqs, qset->nxdpqs, qset->xdpq_start, qset->state); + if (qset->state == FUN_QSTATE_DESTROYED) + kfree(rxqs); + + /* Tell the caller which queues were operated on. */ + qset->rxqs = rxqs; + qset->xdpqs = xdpqs; +} + +static int fun_alloc_rings(struct net_device *netdev, struct fun_qset *qset) +{ + struct funeth_txq **xdpqs = NULL, **txqs; + struct funeth_rxq **rxqs; + int err; + + err = fun_alloc_queue_irqs(netdev, qset->ntxqs, qset->nrxqs); + if (err) + return err; + + rxqs = kcalloc(qset->ntxqs + qset->nrxqs, sizeof(*rxqs), GFP_KERNEL); + if (!rxqs) + return -ENOMEM; + + if (qset->nxdpqs) { + xdpqs = alloc_xdpqs(netdev, qset->nxdpqs, qset->sq_depth, + qset->xdpq_start, qset->state); + if (IS_ERR(xdpqs)) { + err = PTR_ERR(xdpqs); + goto free_qvec; + } + } + + txqs = (struct funeth_txq **)&rxqs[qset->nrxqs]; + err = alloc_txqs(netdev, txqs, qset->ntxqs, qset->sq_depth, + qset->txq_start, qset->state); + if (err) + goto free_xdpqs; + + err = alloc_rxqs(netdev, rxqs, qset->nrxqs, qset->cq_depth, + qset->rq_depth, qset->rxq_start, qset->state); + if (err) + goto free_txqs; + + qset->rxqs = rxqs; + qset->txqs = txqs; + qset->xdpqs = xdpqs; + return 0; + +free_txqs: + free_txqs(txqs, qset->ntxqs, qset->txq_start, FUN_QSTATE_DESTROYED); +free_xdpqs: + free_xdpqs(xdpqs, qset->nxdpqs, qset->xdpq_start, FUN_QSTATE_DESTROYED); +free_qvec: + kfree(rxqs); + return err; +} + +/* Take queues to the next level. Presently this means creating them on the + * device. + */ +static int fun_advance_ring_state(struct net_device *dev, struct fun_qset *qset) +{ + struct funeth_priv *fp = netdev_priv(dev); + int i, err; + + for (i = 0; i < qset->nrxqs; i++) { + err = fun_rxq_create_dev(qset->rxqs[i], + xa_load(&fp->irqs, + i + fp->rx_irq_ofst)); + if (err) + goto out; + } + + for (i = 0; i < qset->ntxqs; i++) { + err = fun_txq_create_dev(qset->txqs[i], xa_load(&fp->irqs, i)); + if (err) + goto out; + } + + for (i = 0; i < qset->nxdpqs; i++) { + err = fun_txq_create_dev(qset->xdpqs[i], NULL); + if (err) + goto out; + } + + return 0; + +out: + fun_free_rings(dev, qset); + 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) +{ + union { + struct fun_admin_eth_req req; + struct fun_admin_generic_create_rsp rsp; + } cmd; + int rc; + + cmd.req.common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_ETH, + sizeof(cmd.req)); + cmd.req.u.create = FUN_ADMIN_ETH_CREATE_REQ_INIT( + FUN_ADMIN_SUBOP_CREATE, + FUN_ADMIN_RES_CREATE_FLAG_ALLOCATOR, + 0, fp->netdev->dev_port); + + rc = fun_submit_admin_sync_cmd(fp->fdev, &cmd.req.common, &cmd.rsp, + sizeof(cmd.rsp), 0); + return rc ? rc : be32_to_cpu(cmd.rsp.id); +} + +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. + * Returns the ETH id (>= 0) on success or a negative error. + */ +int fun_create_and_bind_tx(struct funeth_priv *fp, u32 sqid) +{ + int rc, ethid; + + ethid = fun_eth_create(fp); + if (ethid >= 0) { + 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); + ethid = rc; + } + } + return ethid; +} + +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 long idx, last; + unsigned int qidx; + struct fun_irq *p; + const char *qtype; + int err; + + xa_for_each(&fp->irqs, idx, p) { + if (p->txq) { + qtype = "tx"; + qidx = p->txq->qidx; + } else if (p->rxq) { + qtype = "rx"; + qidx = p->rxq->qidx; + } else { + continue; + } + + if (p->state != FUN_IRQ_INIT) + 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; + } + p->state = FUN_IRQ_REQUESTED; + } + + xa_for_each(&fp->irqs, idx, p) { + if (p->state != FUN_IRQ_REQUESTED) + continue; + irq_set_affinity_notifier(p->irq, &p->aff_notify); + irq_set_affinity_and_hint(p->irq, &p->affinity_mask); + napi_enable(&p->napi); + p->state = FUN_IRQ_ENABLED; + } + + return 0; + +unroll: + last = idx - 1; + xa_for_each_range(&fp->irqs, idx, p, 0, last) + if (p->state == FUN_IRQ_REQUESTED) { + free_irq(p->irq, p); + p->state = FUN_IRQ_INIT; + } + + return err; +} + +static void fun_disable_one_irq(struct fun_irq *irq) +{ + napi_disable(&irq->napi); + irq_set_affinity_notifier(irq->irq, NULL); + irq_update_affinity_hint(irq->irq, NULL); + free_irq(irq->irq, irq); + irq->state = FUN_IRQ_INIT; +} + +static void fun_disable_irqs(struct net_device *dev) +{ + struct funeth_priv *fp = netdev_priv(dev); + struct fun_irq *p; + unsigned long idx; + + xa_for_each(&fp->irqs, idx, p) + if (p->state == FUN_IRQ_ENABLED) + fun_disable_one_irq(p); +} + +static void fun_down(struct net_device *dev, struct fun_qset *qset) +{ + struct funeth_priv *fp = netdev_priv(dev); + + /* If we don't have queues the data path is already down. + * Note netif_running(dev) may be true. + */ + if (!rcu_access_pointer(fp->rxqs)) + return; + + /* It is also down if the queues aren't on the device. */ + if (fp->txqs[0]->init_state >= FUN_QSTATE_INIT_FULL) { + netif_info(fp, ifdown, dev, + "Tearing down data path on device\n"); + fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_DISABLE, 0); + + netif_carrier_off(dev); + netif_tx_disable(dev); + + fun_destroy_rss(fp); + fun_res_destroy(fp->fdev, FUN_ADMIN_OP_VI, 0, dev->dev_port); + fun_disable_irqs(dev); + } + + fun_free_rings(dev, qset); +} + +static int fun_up(struct net_device *dev, struct fun_qset *qset) +{ + 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(dev); + u64 vals[] = { + lower_32_bits(fp->stats_dma_addr), + upper_32_bits(fp->stats_dma_addr), + FUN_PORT_FLAG_ENABLE_NOTIFY + }; + int err; + + netif_info(fp, ifup, dev, "Setting up data path on device\n"); + + if (qset->rxqs[0]->init_state < FUN_QSTATE_INIT_FULL) { + err = fun_advance_ring_state(dev, qset); + if (err) + return err; + } + + err = fun_vi_create(fp); + if (err) + goto free_queues; + + fp->txqs = qset->txqs; + rcu_assign_pointer(fp->rxqs, qset->rxqs); + rcu_assign_pointer(fp->xdpqs, qset->xdpqs); + + err = fun_enable_irqs(dev); + if (err) + goto destroy_vi; + + if (fp->rss_cfg) { + err = fun_config_rss(dev, fp->hash_algo, fp->rss_key, + fp->indir_table, FUN_ADMIN_SUBOP_CREATE); + } else { + /* The non-RSS case has only 1 queue. */ + err = fun_bind(fp->fdev, FUN_ADMIN_BIND_TYPE_VI, dev->dev_port, + FUN_ADMIN_BIND_TYPE_EPCQ, + qset->rxqs[0]->hw_cqid); + } + if (err) + goto disable_irqs; + + err = fun_port_write_cmds(fp, 3, port_keys, vals); + if (err) + goto free_rss; + + netif_tx_start_all_queues(dev); + return 0; + +free_rss: + fun_destroy_rss(fp); +disable_irqs: + fun_disable_irqs(dev); +destroy_vi: + fun_res_destroy(fp->fdev, FUN_ADMIN_OP_VI, 0, dev->dev_port); +free_queues: + fun_free_rings(dev, qset); + return err; +} + +static int funeth_open(struct net_device *netdev) +{ + struct funeth_priv *fp = netdev_priv(netdev); + struct fun_qset qset = { + .nrxqs = netdev->real_num_rx_queues, + .ntxqs = netdev->real_num_tx_queues, + .nxdpqs = fp->num_xdpqs, + .cq_depth = fp->cq_depth, + .rq_depth = fp->rq_depth, + .sq_depth = fp->sq_depth, + .state = FUN_QSTATE_INIT_FULL, + }; + int rc; + + rc = fun_alloc_rings(netdev, &qset); + if (rc) + return rc; + + rc = fun_up(netdev, &qset); + if (rc) { + qset.state = FUN_QSTATE_DESTROYED; + fun_free_rings(netdev, &qset); + } + + return rc; +} + +static int funeth_close(struct net_device *netdev) +{ + struct fun_qset qset = { .state = FUN_QSTATE_DESTROYED }; + + fun_down(netdev, &qset); + 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_txq **xdpqs; + 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; + } + + 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; + } + + xdpqs = rcu_dereference(fp->xdpqs); + if (!xdpqs) + goto unlock; + + for (i = 0; i < fp->num_xdpqs; i++) { + struct funeth_txq_stats txs; + + FUN_QSTAT_READ(xdpqs[i], start, txs); + stats->tx_packets += txs.tx_pkts; + stats->tx_bytes += txs.tx_bytes; + } +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; + + /* 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; + } +} + +/* Prepare the queues for XDP. */ +static int fun_enter_xdp(struct net_device *dev, struct bpf_prog *prog) +{ + struct funeth_priv *fp = netdev_priv(dev); + unsigned int i, nqs = num_online_cpus(); + struct funeth_txq **xdpqs; + struct funeth_rxq **rxqs; + int err; + + xdpqs = alloc_xdpqs(dev, nqs, fp->sq_depth, 0, FUN_QSTATE_INIT_FULL); + if (IS_ERR(xdpqs)) + return PTR_ERR(xdpqs); + + rxqs = rtnl_dereference(fp->rxqs); + for (i = 0; i < dev->real_num_rx_queues; i++) { + err = fun_rxq_set_bpf(rxqs[i], prog); + if (err) + goto out; + } + + fp->num_xdpqs = nqs; + rcu_assign_pointer(fp->xdpqs, xdpqs); + return 0; +out: + while (i--) + fun_rxq_set_bpf(rxqs[i], NULL); + + free_xdpqs(xdpqs, nqs, 0, FUN_QSTATE_DESTROYED); + return err; +} + +/* Set the queues for non-XDP operation. */ +static void fun_end_xdp(struct net_device *dev) +{ + struct funeth_priv *fp = netdev_priv(dev); + struct funeth_txq **xdpqs; + struct funeth_rxq **rxqs; + unsigned int i; + + xdpqs = rtnl_dereference(fp->xdpqs); + rcu_assign_pointer(fp->xdpqs, NULL); + synchronize_net(); + /* at this point both Rx and Tx XDP processing has ended */ + + free_xdpqs(xdpqs, fp->num_xdpqs, 0, FUN_QSTATE_DESTROYED); + fp->num_xdpqs = 0; + + rxqs = rtnl_dereference(fp->rxqs); + for (i = 0; i < dev->real_num_rx_queues; i++) + fun_rxq_set_bpf(rxqs[i], NULL); +} + +#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); + int i, err; + + /* 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; + } + + if (!netif_running(dev)) { + fp->num_xdpqs = prog ? num_online_cpus() : 0; + } else if (prog && !fp->xdp_prog) { + err = fun_enter_xdp(dev, prog); + if (err) { + NL_SET_ERR_MSG_MOD(xdp->extack, + "Failed to set queues for XDP."); + return err; + } + } else if (!prog && fp->xdp_prog) { + fun_end_xdp(dev); + } else { + 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); + } + + dev->max_mtu = prog ? XDP_MAX_MTU : FUN_MAX_MTU; + old_prog = xchg(&fp->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_ethdev *ed, + unsigned int vport) +{ + 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_adi_param mac_param = {}; + struct fun_dev *fdev = fp->fdev; + struct fun_ethdev *ed = to_fun_ethdev(fdev); + struct fun_vport_info *vi; + int rc = -EINVAL; + + if (is_multicast_ether_addr(mac)) + return -EINVAL; + + mutex_lock(&ed->state_mutex); + vi = fun_get_vport(ed, vf); + if (!vi) + goto unlock; + + 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); +unlock: + mutex_unlock(&ed->state_mutex); + 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_adi_param vlan_param = {}; + struct fun_dev *fdev = fp->fdev; + struct fun_ethdev *ed = to_fun_ethdev(fdev); + struct fun_vport_info *vi; + int rc = -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; + + mutex_lock(&ed->state_mutex); + vi = fun_get_vport(ed, vf); + if (!vi) + goto unlock; + + 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) { + vi->vlan = vlan; + vi->qos = qos; + vi->vlan_proto = vlan_proto; + } +unlock: + mutex_unlock(&ed->state_mutex); + return rc; +} + +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_adi_param rate_param = {}; + struct fun_dev *fdev = fp->fdev; + struct fun_ethdev *ed = to_fun_ethdev(fdev); + struct fun_vport_info *vi; + int rc = -EINVAL; + + if (min_tx_rate) + return -EINVAL; + + mutex_lock(&ed->state_mutex); + vi = fun_get_vport(ed, vf); + if (!vi) + goto unlock; + + 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) + vi->max_rate = max_tx_rate; +unlock: + mutex_unlock(&ed->state_mutex); + return rc; +} + +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_ethdev *ed = to_fun_ethdev(fp->fdev); + const struct fun_vport_info *vi; + + mutex_lock(&ed->state_mutex); + vi = fun_get_vport(ed, vf); + if (!vi) + goto unlock; + + 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; +unlock: + mutex_unlock(&ed->state_mutex); + return vi ? 0 : -EINVAL; +} + +static void fun_uninit(struct net_device *dev) +{ + struct funeth_priv *fp = netdev_priv(dev); + + fun_prune_queue_irqs(dev); + xa_destroy(&fp->irqs); +} + +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_eth_ioctl = fun_ioctl, + .ndo_uninit = fun_uninit, + .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 | \ + NETIF_F_GSO_UDP_L4) +#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. + */ +static void fun_reset_rss_indir(struct net_device *dev, unsigned int nrx) +{ + 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, nrx); + fun_dflt_rss_indir(fp, nrx); +} + +/* Update the RSS LUT to contain only queues in [0, nrx). Normally this will + * update the LUT to an equal distribution among nrx queues, If @only_if_needed + * is set the LUT is left unchanged if it already does not reference any queues + * >= nrx. + */ +static int fun_rss_set_qnum(struct net_device *dev, unsigned int nrx, + bool only_if_needed) +{ + struct funeth_priv *fp = netdev_priv(dev); + u32 old_lut[FUN_ETH_RSS_MAX_INDIR_ENT]; + unsigned int i, oldsz; + int err; + + if (!fp->rss_cfg) + return 0; + + if (only_if_needed) { + for (i = 0; i < fp->indir_table_nentries; i++) + if (fp->indir_table[i] >= nrx) + break; + + if (i >= fp->indir_table_nentries) + return 0; + } + + memcpy(old_lut, fp->indir_table, sizeof(old_lut)); + oldsz = fp->indir_table_nentries; + fun_reset_rss_indir(dev, nrx); + + err = fun_config_rss(dev, fp->hash_algo, fp->rss_key, + fp->indir_table, FUN_ADMIN_SUBOP_MODIFY); + if (!err) + return 0; + + memcpy(fp->indir_table, old_lut, sizeof(old_lut)); + fp->indir_table_nentries = oldsz; + return err; +} + +/* 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, dev->real_num_rx_queues); + 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; + } +} + +void fun_set_ring_count(struct net_device *netdev, unsigned int ntx, + unsigned int nrx) +{ + netif_set_real_num_tx_queues(netdev, ntx); + if (nrx != netdev->real_num_rx_queues) { + netif_set_real_num_rx_queues(netdev, nrx); + fun_reset_rss_indir(netdev, nrx); + } +} + +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); +} + +/* Replace the existing Rx/Tx/XDP queues with equal number of queues with + * different settings, e.g. depth. This is a disruptive replacement that + * temporarily shuts down the data path and should be limited to changes that + * can't be applied to live queues. The old queues are always discarded. + */ +int fun_replace_queues(struct net_device *dev, struct fun_qset *newqs, + struct netlink_ext_ack *extack) +{ + struct fun_qset oldqs = { .state = FUN_QSTATE_DESTROYED }; + struct funeth_priv *fp = netdev_priv(dev); + int err; + + newqs->nrxqs = dev->real_num_rx_queues; + newqs->ntxqs = dev->real_num_tx_queues; + newqs->nxdpqs = fp->num_xdpqs; + newqs->state = FUN_QSTATE_INIT_SW; + err = fun_alloc_rings(dev, newqs); + if (err) { + NL_SET_ERR_MSG_MOD(extack, + "Unable to allocate memory for new queues, keeping current settings"); + return err; + } + + fun_down(dev, &oldqs); + + err = fun_up(dev, newqs); + if (!err) + return 0; + + /* The new queues couldn't be installed. We do not retry the old queues + * as they are the same to the device as the new queues and would + * similarly fail. + */ + newqs->state = FUN_QSTATE_DESTROYED; + fun_free_rings(dev, newqs); + NL_SET_ERR_MSG_MOD(extack, "Unable to restore the data path with the new queues."); + return err; +} + +/* Change the number of Rx/Tx queues of a device while it is up. This is done + * by incrementally adding/removing queues to meet the new requirements while + * handling ongoing traffic. + */ +int fun_change_num_queues(struct net_device *dev, unsigned int ntx, + unsigned int nrx) +{ + unsigned int keep_tx = min(dev->real_num_tx_queues, ntx); + unsigned int keep_rx = min(dev->real_num_rx_queues, nrx); + struct funeth_priv *fp = netdev_priv(dev); + struct fun_qset oldqs = { + .rxqs = rtnl_dereference(fp->rxqs), + .txqs = fp->txqs, + .nrxqs = dev->real_num_rx_queues, + .ntxqs = dev->real_num_tx_queues, + .rxq_start = keep_rx, + .txq_start = keep_tx, + .state = FUN_QSTATE_DESTROYED + }; + struct fun_qset newqs = { + .nrxqs = nrx, + .ntxqs = ntx, + .rxq_start = keep_rx, + .txq_start = keep_tx, + .cq_depth = fp->cq_depth, + .rq_depth = fp->rq_depth, + .sq_depth = fp->sq_depth, + .state = FUN_QSTATE_INIT_FULL + }; + int i, err; + + err = fun_alloc_rings(dev, &newqs); + if (err) + goto free_irqs; + + err = fun_enable_irqs(dev); /* of any newly added queues */ + if (err) + goto free_rings; + + /* copy the queues we are keeping to the new set */ + memcpy(newqs.rxqs, oldqs.rxqs, keep_rx * sizeof(*oldqs.rxqs)); + memcpy(newqs.txqs, fp->txqs, keep_tx * sizeof(*fp->txqs)); + + if (nrx < dev->real_num_rx_queues) { + err = fun_rss_set_qnum(dev, nrx, true); + if (err) + goto disable_tx_irqs; + + for (i = nrx; i < dev->real_num_rx_queues; i++) + fun_disable_one_irq(container_of(oldqs.rxqs[i]->napi, + struct fun_irq, napi)); + + netif_set_real_num_rx_queues(dev, nrx); + } + + if (ntx < dev->real_num_tx_queues) + netif_set_real_num_tx_queues(dev, ntx); + + rcu_assign_pointer(fp->rxqs, newqs.rxqs); + fp->txqs = newqs.txqs; + synchronize_net(); + + if (ntx > dev->real_num_tx_queues) + netif_set_real_num_tx_queues(dev, ntx); + + if (nrx > dev->real_num_rx_queues) { + netif_set_real_num_rx_queues(dev, nrx); + fun_rss_set_qnum(dev, nrx, false); + } + + /* disable interrupts of any excess Tx queues */ + for (i = keep_tx; i < oldqs.ntxqs; i++) + fun_disable_one_irq(oldqs.txqs[i]->irq); + + fun_free_rings(dev, &oldqs); + fun_prune_queue_irqs(dev); + return 0; + +disable_tx_irqs: + for (i = oldqs.ntxqs; i < ntx; i++) + fun_disable_one_irq(newqs.txqs[i]->irq); +free_rings: + newqs.state = FUN_QSTATE_DESTROYED; + fun_free_rings(dev, &newqs); +free_irqs: + fun_prune_queue_irqs(dev); + return err; +} + +static int fun_create_netdev(struct fun_ethdev *ed, unsigned int portid) +{ + struct fun_dev *fdev = &ed->fdev; + struct net_device *netdev; + struct funeth_priv *fp; + unsigned int ntx, nrx; + 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; + xa_init(&fp->irqs); + fp->rx_irq_ofst = ntx; + 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; + + devlink_port_type_eth_set(&fp->dl_port, netdev); + + return 0; + +unreg_devlink: + ed->netdevs[portid] = NULL; + fun_ktls_cleanup(fp); + 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) +{ + struct funeth_priv *fp; + + fp = netdev_priv(netdev); + devlink_port_type_clear(&fp->dl_port); + unregister_netdev(netdev); + devlink_port_unregister(&fp->dl_port); + 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_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; + } + + mutex_lock(&ed->state_mutex); + fun_free_vports(ed); + mutex_unlock(&ed->state_mutex); + pci_disable_sriov(pdev); + return 0; + } + + rc = pci_enable_sriov(pdev, nvfs); + if (rc) + return rc; + + mutex_lock(&ed->state_mutex); + rc = fun_init_vports(ed, nvfs); + mutex_unlock(&ed->state_mutex); + if (rc) { + pci_disable_sriov(pdev); + return rc; + } + + return nvfs; +} + +static int funeth_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + 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, + }; + struct devlink *devlink; + struct fun_ethdev *ed; + struct fun_dev *fdev; + int rc; + + devlink = fun_devlink_alloc(&pdev->dev); + if (!devlink) { + dev_err(&pdev->dev, "devlink alloc failed\n"); + return -ENOMEM; + } + + ed = devlink_priv(devlink); + mutex_init(&ed->state_mutex); + + 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: + mutex_destroy(&ed->state_mutex); + 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; + + 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); + mutex_destroy(&ed->state_mutex); + + fun_devlink_free(devlink); +} + +static struct pci_driver funeth_driver = { + .name = KBUILD_MODNAME, + .id_table = funeth_id_table, + .probe = funeth_probe, + .remove = funeth_remove, + .shutdown = funeth_remove, + .sriov_configure = funeth_sriov_configure, +}; + +module_pci_driver(funeth_driver); + +MODULE_AUTHOR("Dimitris Michailidis <dmichail@fungible.com>"); +MODULE_DESCRIPTION("Fungible Ethernet Network Driver"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DEVICE_TABLE(pci, funeth_id_table); |