diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_net_common.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 2593 |
1 files changed, 2593 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c new file mode 100644 index 000000000..27f4786ac --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -0,0 +1,2593 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* Copyright (C) 2015-2019 Netronome Systems, Inc. */ + +/* + * nfp_net_common.c + * Netronome network device driver: Common functions between PF and VF + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + * Brad Petrus <brad.petrus@netronome.com> + * Chris Telfer <chris.telfer@netronome.com> + */ + +#include <linux/bitfield.h> +#include <linux/bpf.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/mm.h> +#include <linux/overflow.h> +#include <linux/page_ref.h> +#include <linux/pci.h> +#include <linux/pci_regs.h> +#include <linux/msi.h> +#include <linux/ethtool.h> +#include <linux/log2.h> +#include <linux/if_vlan.h> +#include <linux/if_bridge.h> +#include <linux/random.h> +#include <linux/vmalloc.h> +#include <linux/ktime.h> + +#include <net/tls.h> +#include <net/vxlan.h> +#include <net/xdp_sock_drv.h> + +#include "nfpcore/nfp_dev.h" +#include "nfpcore/nfp_nsp.h" +#include "ccm.h" +#include "nfp_app.h" +#include "nfp_net_ctrl.h" +#include "nfp_net.h" +#include "nfp_net_dp.h" +#include "nfp_net_sriov.h" +#include "nfp_net_xsk.h" +#include "nfp_port.h" +#include "crypto/crypto.h" +#include "crypto/fw.h" + +/** + * nfp_net_get_fw_version() - Read and parse the FW version + * @fw_ver: Output fw_version structure to read to + * @ctrl_bar: Mapped address of the control BAR + */ +void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, + void __iomem *ctrl_bar) +{ + u32 reg; + + reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); + put_unaligned_le32(reg, fw_ver); +} + +u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue) +{ + queue &= dev_info->qc_idx_mask; + return dev_info->qc_addr_offset + NFP_QCP_QUEUE_ADDR_SZ * queue; +} + +/* Firmware reconfig + * + * Firmware reconfig may take a while so we have two versions of it - + * synchronous and asynchronous (posted). All synchronous callers are holding + * RTNL so we don't have to worry about serializing them. + */ +static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) +{ + nn_writel(nn, NFP_NET_CFG_UPDATE, update); + /* ensure update is written before pinging HW */ + nn_pci_flush(nn); + nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); + nn->reconfig_in_progress_update = update; +} + +/* Pass 0 as update to run posted reconfigs. */ +static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update) +{ + update |= nn->reconfig_posted; + nn->reconfig_posted = 0; + + nfp_net_reconfig_start(nn, update); + + nn->reconfig_timer_active = true; + mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ); +} + +static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) +{ + u32 reg; + + reg = nn_readl(nn, NFP_NET_CFG_UPDATE); + if (reg == 0) + return true; + if (reg & NFP_NET_CFG_UPDATE_ERR) { + nn_err(nn, "Reconfig error (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n", + reg, nn->reconfig_in_progress_update, + nn_readl(nn, NFP_NET_CFG_CTRL)); + return true; + } else if (last_check) { + nn_err(nn, "Reconfig timeout (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n", + reg, nn->reconfig_in_progress_update, + nn_readl(nn, NFP_NET_CFG_CTRL)); + return true; + } + + return false; +} + +static bool __nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) +{ + bool timed_out = false; + int i; + + /* Poll update field, waiting for NFP to ack the config. + * Do an opportunistic wait-busy loop, afterward sleep. + */ + for (i = 0; i < 50; i++) { + if (nfp_net_reconfig_check_done(nn, false)) + return false; + udelay(4); + } + + while (!nfp_net_reconfig_check_done(nn, timed_out)) { + usleep_range(250, 500); + timed_out = time_is_before_eq_jiffies(deadline); + } + + return timed_out; +} + +static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) +{ + if (__nfp_net_reconfig_wait(nn, deadline)) + return -EIO; + + if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) + return -EIO; + + return 0; +} + +static void nfp_net_reconfig_timer(struct timer_list *t) +{ + struct nfp_net *nn = from_timer(nn, t, reconfig_timer); + + spin_lock_bh(&nn->reconfig_lock); + + nn->reconfig_timer_active = false; + + /* If sync caller is present it will take over from us */ + if (nn->reconfig_sync_present) + goto done; + + /* Read reconfig status and report errors */ + nfp_net_reconfig_check_done(nn, true); + + if (nn->reconfig_posted) + nfp_net_reconfig_start_async(nn, 0); +done: + spin_unlock_bh(&nn->reconfig_lock); +} + +/** + * nfp_net_reconfig_post() - Post async reconfig request + * @nn: NFP Net device to reconfigure + * @update: The value for the update field in the BAR config + * + * Record FW reconfiguration request. Reconfiguration will be kicked off + * whenever reconfiguration machinery is idle. Multiple requests can be + * merged together! + */ +static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) +{ + spin_lock_bh(&nn->reconfig_lock); + + /* Sync caller will kick off async reconf when it's done, just post */ + if (nn->reconfig_sync_present) { + nn->reconfig_posted |= update; + goto done; + } + + /* Opportunistically check if the previous command is done */ + if (!nn->reconfig_timer_active || + nfp_net_reconfig_check_done(nn, false)) + nfp_net_reconfig_start_async(nn, update); + else + nn->reconfig_posted |= update; +done: + spin_unlock_bh(&nn->reconfig_lock); +} + +static void nfp_net_reconfig_sync_enter(struct nfp_net *nn) +{ + bool cancelled_timer = false; + u32 pre_posted_requests; + + spin_lock_bh(&nn->reconfig_lock); + + WARN_ON(nn->reconfig_sync_present); + nn->reconfig_sync_present = true; + + if (nn->reconfig_timer_active) { + nn->reconfig_timer_active = false; + cancelled_timer = true; + } + pre_posted_requests = nn->reconfig_posted; + nn->reconfig_posted = 0; + + spin_unlock_bh(&nn->reconfig_lock); + + if (cancelled_timer) { + del_timer_sync(&nn->reconfig_timer); + nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires); + } + + /* Run the posted reconfigs which were issued before we started */ + if (pre_posted_requests) { + nfp_net_reconfig_start(nn, pre_posted_requests); + nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); + } +} + +static void nfp_net_reconfig_wait_posted(struct nfp_net *nn) +{ + nfp_net_reconfig_sync_enter(nn); + + spin_lock_bh(&nn->reconfig_lock); + nn->reconfig_sync_present = false; + spin_unlock_bh(&nn->reconfig_lock); +} + +/** + * __nfp_net_reconfig() - Reconfigure the firmware + * @nn: NFP Net device to reconfigure + * @update: The value for the update field in the BAR config + * + * Write the update word to the BAR and ping the reconfig queue. The + * poll until the firmware has acknowledged the update by zeroing the + * update word. + * + * Return: Negative errno on error, 0 on success + */ +int __nfp_net_reconfig(struct nfp_net *nn, u32 update) +{ + int ret; + + nfp_net_reconfig_sync_enter(nn); + + nfp_net_reconfig_start(nn, update); + ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); + + spin_lock_bh(&nn->reconfig_lock); + + if (nn->reconfig_posted) + nfp_net_reconfig_start_async(nn, 0); + + nn->reconfig_sync_present = false; + + spin_unlock_bh(&nn->reconfig_lock); + + return ret; +} + +int nfp_net_reconfig(struct nfp_net *nn, u32 update) +{ + int ret; + + nn_ctrl_bar_lock(nn); + ret = __nfp_net_reconfig(nn, update); + nn_ctrl_bar_unlock(nn); + + return ret; +} + +int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size) +{ + if (nn->tlv_caps.mbox_len < NFP_NET_CFG_MBOX_SIMPLE_VAL + data_size) { + nn_err(nn, "mailbox too small for %u of data (%u)\n", + data_size, nn->tlv_caps.mbox_len); + return -EIO; + } + + nn_ctrl_bar_lock(nn); + return 0; +} + +/** + * nfp_net_mbox_reconfig() - Reconfigure the firmware via the mailbox + * @nn: NFP Net device to reconfigure + * @mbox_cmd: The value for the mailbox command + * + * Helper function for mailbox updates + * + * Return: Negative errno on error, 0 on success + */ +int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd) +{ + u32 mbox = nn->tlv_caps.mbox_off; + int ret; + + nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd); + + ret = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX); + if (ret) { + nn_err(nn, "Mailbox update error\n"); + return ret; + } + + return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET); +} + +void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 mbox_cmd) +{ + u32 mbox = nn->tlv_caps.mbox_off; + + nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd); + + nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_MBOX); +} + +int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn) +{ + u32 mbox = nn->tlv_caps.mbox_off; + + nfp_net_reconfig_wait_posted(nn); + + return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET); +} + +int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd) +{ + int ret; + + ret = nfp_net_mbox_reconfig(nn, mbox_cmd); + nn_ctrl_bar_unlock(nn); + return ret; +} + +/* Interrupt configuration and handling + */ + +/** + * nfp_net_irqs_alloc() - allocates MSI-X irqs + * @pdev: PCI device structure + * @irq_entries: Array to be initialized and used to hold the irq entries + * @min_irqs: Minimal acceptable number of interrupts + * @wanted_irqs: Target number of interrupts to allocate + * + * Return: Number of irqs obtained or 0 on error. + */ +unsigned int +nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, + unsigned int min_irqs, unsigned int wanted_irqs) +{ + unsigned int i; + int got_irqs; + + for (i = 0; i < wanted_irqs; i++) + irq_entries[i].entry = i; + + got_irqs = pci_enable_msix_range(pdev, irq_entries, + min_irqs, wanted_irqs); + if (got_irqs < 0) { + dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n", + min_irqs, wanted_irqs, got_irqs); + return 0; + } + + if (got_irqs < wanted_irqs) + dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n", + wanted_irqs, got_irqs); + + return got_irqs; +} + +/** + * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev + * @nn: NFP Network structure + * @irq_entries: Table of allocated interrupts + * @n: Size of @irq_entries (number of entries to grab) + * + * After interrupts are allocated with nfp_net_irqs_alloc() this function + * should be called to assign them to a specific netdev (port). + */ +void +nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, + unsigned int n) +{ + struct nfp_net_dp *dp = &nn->dp; + + nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS; + dp->num_r_vecs = nn->max_r_vecs; + + memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n); + + if (dp->num_rx_rings > dp->num_r_vecs || + dp->num_tx_rings > dp->num_r_vecs) + dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n", + dp->num_rx_rings, dp->num_tx_rings, + dp->num_r_vecs); + + dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings); + dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings); + dp->num_stack_tx_rings = dp->num_tx_rings; +} + +/** + * nfp_net_irqs_disable() - Disable interrupts + * @pdev: PCI device structure + * + * Undoes what @nfp_net_irqs_alloc() does. + */ +void nfp_net_irqs_disable(struct pci_dev *pdev) +{ + pci_disable_msix(pdev); +} + +/** + * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) +{ + struct nfp_net_r_vector *r_vec = data; + + /* Currently we cannot tell if it's a rx or tx interrupt, + * since dim does not need accurate event_ctr to calculate, + * we just use this counter for both rx and tx dim. + */ + r_vec->event_ctr++; + + napi_schedule_irqoff(&r_vec->napi); + + /* The FW auto-masks any interrupt, either via the MASK bit in + * the MSI-X table or via the per entry ICR field. So there + * is no need to disable interrupts here. + */ + return IRQ_HANDLED; +} + +static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data) +{ + struct nfp_net_r_vector *r_vec = data; + + tasklet_schedule(&r_vec->tasklet); + + return IRQ_HANDLED; +} + +/** + * nfp_net_read_link_status() - Reread link status from control BAR + * @nn: NFP Network structure + */ +static void nfp_net_read_link_status(struct nfp_net *nn) +{ + unsigned long flags; + bool link_up; + u16 sts; + + spin_lock_irqsave(&nn->link_status_lock, flags); + + sts = nn_readw(nn, NFP_NET_CFG_STS); + link_up = !!(sts & NFP_NET_CFG_STS_LINK); + + if (nn->link_up == link_up) + goto out; + + nn->link_up = link_up; + if (nn->port) { + set_bit(NFP_PORT_CHANGED, &nn->port->flags); + if (nn->port->link_cb) + nn->port->link_cb(nn->port); + } + + if (nn->link_up) { + netif_carrier_on(nn->dp.netdev); + netdev_info(nn->dp.netdev, "NIC Link is Up\n"); + } else { + netif_carrier_off(nn->dp.netdev); + netdev_info(nn->dp.netdev, "NIC Link is Down\n"); + } +out: + spin_unlock_irqrestore(&nn->link_status_lock, flags); +} + +/** + * nfp_net_irq_lsc() - Interrupt service routine for link state changes + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_lsc(int irq, void *data) +{ + struct nfp_net *nn = data; + struct msix_entry *entry; + + entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX]; + + nfp_net_read_link_status(nn); + + nfp_net_irq_unmask(nn, entry->entry); + + return IRQ_HANDLED; +} + +/** + * nfp_net_irq_exn() - Interrupt service routine for exceptions + * @irq: Interrupt + * @data: Opaque data structure + * + * Return: Indicate if the interrupt has been handled. + */ +static irqreturn_t nfp_net_irq_exn(int irq, void *data) +{ + struct nfp_net *nn = data; + + nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); + /* XXX TO BE IMPLEMENTED */ + return IRQ_HANDLED; +} + +/** + * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @format: printf-style format to construct the interrupt name + * @name: Pointer to allocated space for interrupt name + * @name_sz: Size of space for interrupt name + * @vector_idx: Index of MSI-X vector used for this interrupt + * @handler: IRQ handler to register for this interrupt + */ +static int +nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, + const char *format, char *name, size_t name_sz, + unsigned int vector_idx, irq_handler_t handler) +{ + struct msix_entry *entry; + int err; + + entry = &nn->irq_entries[vector_idx]; + + snprintf(name, name_sz, format, nfp_net_name(nn)); + err = request_irq(entry->vector, handler, 0, name, nn); + if (err) { + nn_err(nn, "Failed to request IRQ %d (err=%d).\n", + entry->vector, err); + return err; + } + nn_writeb(nn, ctrl_offset, entry->entry); + nfp_net_irq_unmask(nn, entry->entry); + + return 0; +} + +/** + * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) + * @nn: NFP Network structure + * @ctrl_offset: Control BAR offset where IRQ configuration should be written + * @vector_idx: Index of MSI-X vector used for this interrupt + */ +static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, + unsigned int vector_idx) +{ + nn_writeb(nn, ctrl_offset, 0xff); + nn_pci_flush(nn); + free_irq(nn->irq_entries[vector_idx].vector, nn); +} + +struct sk_buff * +nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, + struct sk_buff *skb, u64 *tls_handle, int *nr_frags) +{ +#ifdef CONFIG_TLS_DEVICE + struct nfp_net_tls_offload_ctx *ntls; + struct sk_buff *nskb; + bool resync_pending; + u32 datalen, seq; + + if (likely(!dp->ktls_tx)) + return skb; + if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)) + return skb; + + datalen = skb->len - skb_tcp_all_headers(skb); + seq = ntohl(tcp_hdr(skb)->seq); + ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX); + resync_pending = tls_offload_tx_resync_pending(skb->sk); + if (unlikely(resync_pending || ntls->next_seq != seq)) { + /* Pure ACK out of order already */ + if (!datalen) + return skb; + + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tls_tx_fallback++; + u64_stats_update_end(&r_vec->tx_sync); + + nskb = tls_encrypt_skb(skb); + if (!nskb) { + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tls_tx_no_fallback++; + u64_stats_update_end(&r_vec->tx_sync); + return NULL; + } + /* encryption wasn't necessary */ + if (nskb == skb) + return skb; + /* we don't re-check ring space */ + if (unlikely(skb_is_nonlinear(nskb))) { + nn_dp_warn(dp, "tls_encrypt_skb() produced fragmented frame\n"); + u64_stats_update_begin(&r_vec->tx_sync); + r_vec->tx_errors++; + u64_stats_update_end(&r_vec->tx_sync); + dev_kfree_skb_any(nskb); + return NULL; + } + + /* jump forward, a TX may have gotten lost, need to sync TX */ + if (!resync_pending && seq - ntls->next_seq < U32_MAX / 4) + tls_offload_tx_resync_request(nskb->sk, seq, + ntls->next_seq); + + *nr_frags = 0; + return nskb; + } + + if (datalen) { + u64_stats_update_begin(&r_vec->tx_sync); + if (!skb_is_gso(skb)) + r_vec->hw_tls_tx++; + else + r_vec->hw_tls_tx += skb_shinfo(skb)->gso_segs; + u64_stats_update_end(&r_vec->tx_sync); + } + + memcpy(tls_handle, ntls->fw_handle, sizeof(ntls->fw_handle)); + ntls->next_seq += datalen; +#endif + return skb; +} + +void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle) +{ +#ifdef CONFIG_TLS_DEVICE + struct nfp_net_tls_offload_ctx *ntls; + u32 datalen, seq; + + if (!tls_handle) + return; + if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))) + return; + + datalen = skb->len - skb_tcp_all_headers(skb); + seq = ntohl(tcp_hdr(skb)->seq); + + ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX); + if (ntls->next_seq == seq + datalen) + ntls->next_seq = seq; + else + WARN_ON_ONCE(1); +#endif +} + +static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) +{ + struct nfp_net *nn = netdev_priv(netdev); + + nn_warn(nn, "TX watchdog timeout on ring: %u\n", txqueue); +} + +/* Receive processing */ +static unsigned int +nfp_net_calc_fl_bufsz_data(struct nfp_net_dp *dp) +{ + unsigned int fl_bufsz = 0; + + if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) + fl_bufsz += NFP_NET_MAX_PREPEND; + else + fl_bufsz += dp->rx_offset; + fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu; + + return fl_bufsz; +} + +static unsigned int nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp) +{ + unsigned int fl_bufsz; + + fl_bufsz = NFP_NET_RX_BUF_HEADROOM; + fl_bufsz += dp->rx_dma_off; + fl_bufsz += nfp_net_calc_fl_bufsz_data(dp); + + fl_bufsz = SKB_DATA_ALIGN(fl_bufsz); + fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + + return fl_bufsz; +} + +static unsigned int nfp_net_calc_fl_bufsz_xsk(struct nfp_net_dp *dp) +{ + unsigned int fl_bufsz; + + fl_bufsz = XDP_PACKET_HEADROOM; + fl_bufsz += nfp_net_calc_fl_bufsz_data(dp); + + return fl_bufsz; +} + +/* Setup and Configuration + */ + +/** + * nfp_net_vecs_init() - Assign IRQs and setup rvecs. + * @nn: NFP Network structure + */ +static void nfp_net_vecs_init(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + int r; + + nn->lsc_handler = nfp_net_irq_lsc; + nn->exn_handler = nfp_net_irq_exn; + + for (r = 0; r < nn->max_r_vecs; r++) { + struct msix_entry *entry; + + entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r]; + + r_vec = &nn->r_vecs[r]; + r_vec->nfp_net = nn; + r_vec->irq_entry = entry->entry; + r_vec->irq_vector = entry->vector; + + if (nn->dp.netdev) { + r_vec->handler = nfp_net_irq_rxtx; + } else { + r_vec->handler = nfp_ctrl_irq_rxtx; + + __skb_queue_head_init(&r_vec->queue); + spin_lock_init(&r_vec->lock); + tasklet_setup(&r_vec->tasklet, nn->dp.ops->ctrl_poll); + tasklet_disable(&r_vec->tasklet); + } + + cpumask_set_cpu(r, &r_vec->affinity_mask); + } +} + +static void +nfp_net_napi_add(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, int idx) +{ + if (dp->netdev) + netif_napi_add(dp->netdev, &r_vec->napi, + nfp_net_has_xsk_pool_slow(dp, idx) ? dp->ops->xsk_poll : dp->ops->poll); + else + tasklet_enable(&r_vec->tasklet); +} + +static void +nfp_net_napi_del(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec) +{ + if (dp->netdev) + netif_napi_del(&r_vec->napi); + else + tasklet_disable(&r_vec->tasklet); +} + +static void +nfp_net_vector_assign_rings(struct nfp_net_dp *dp, + struct nfp_net_r_vector *r_vec, int idx) +{ + r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL; + r_vec->tx_ring = + idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL; + + r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ? + &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL; + + if (nfp_net_has_xsk_pool_slow(dp, idx) || r_vec->xsk_pool) { + r_vec->xsk_pool = dp->xdp_prog ? dp->xsk_pools[idx] : NULL; + + if (r_vec->xsk_pool) + xsk_pool_set_rxq_info(r_vec->xsk_pool, + &r_vec->rx_ring->xdp_rxq); + + nfp_net_napi_del(dp, r_vec); + nfp_net_napi_add(dp, r_vec, idx); + } +} + +static int +nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + int idx) +{ + int err; + + nfp_net_napi_add(&nn->dp, r_vec, idx); + + snprintf(r_vec->name, sizeof(r_vec->name), + "%s-rxtx-%d", nfp_net_name(nn), idx); + err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name, + r_vec); + if (err) { + nfp_net_napi_del(&nn->dp, r_vec); + nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector); + return err; + } + disable_irq(r_vec->irq_vector); + + irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask); + + nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector, + r_vec->irq_entry); + + return 0; +} + +static void +nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) +{ + irq_set_affinity_hint(r_vec->irq_vector, NULL); + nfp_net_napi_del(&nn->dp, r_vec); + free_irq(r_vec->irq_vector, r_vec); +} + +/** + * nfp_net_rss_write_itbl() - Write RSS indirection table to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_itbl(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, + get_unaligned_le32(nn->rss_itbl + i)); +} + +/** + * nfp_net_rss_write_key() - Write RSS hash key to device + * @nn: NFP Net device to reconfigure + */ +void nfp_net_rss_write_key(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4) + nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, + get_unaligned_le32(nn->rss_key + i)); +} + +/** + * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW + * @nn: NFP Net device to reconfigure + */ +void nfp_net_coalesce_write_cfg(struct nfp_net *nn) +{ + u8 i; + u32 factor; + u32 value; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->tlv_caps.me_freq_mhz / 16; + + /* copy RX interrupt coalesce parameters */ + value = (nn->rx_coalesce_max_frames << 16) | + (factor * nn->rx_coalesce_usecs); + for (i = 0; i < nn->dp.num_rx_rings; i++) + nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); + + /* copy TX interrupt coalesce parameters */ + value = (nn->tx_coalesce_max_frames << 16) | + (factor * nn->tx_coalesce_usecs); + for (i = 0; i < nn->dp.num_tx_rings; i++) + nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); +} + +/** + * nfp_net_write_mac_addr() - Write mac address to the device control BAR + * @nn: NFP Net device to reconfigure + * @addr: MAC address to write + * + * Writes the MAC address from the netdev to the device control BAR. Does not + * perform the required reconfig. We do a bit of byte swapping dance because + * firmware is LE. + */ +static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr) +{ + nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr)); + nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4)); +} + +/** + * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP + * @nn: NFP Net device to reconfigure + * + * Warning: must be fully idempotent. + */ +static void nfp_net_clear_config_and_disable(struct nfp_net *nn) +{ + u32 new_ctrl, update; + unsigned int r; + int err; + + new_ctrl = nn->dp.ctrl; + new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; + update = NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; + + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) + nn_err(nn, "Could not disable device: %d\n", err); + + for (r = 0; r < nn->dp.num_rx_rings; r++) { + nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]); + if (nfp_net_has_xsk_pool_slow(&nn->dp, nn->dp.rx_rings[r].idx)) + nfp_net_xsk_rx_bufs_free(&nn->dp.rx_rings[r]); + } + for (r = 0; r < nn->dp.num_tx_rings; r++) + nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]); + for (r = 0; r < nn->dp.num_r_vecs; r++) + nfp_net_vec_clear_ring_data(nn, r); + + nn->dp.ctrl = new_ctrl; +} + +/** + * nfp_net_set_config_and_enable() - Write control BAR and enable NFP + * @nn: NFP Net device to reconfigure + */ +static int nfp_net_set_config_and_enable(struct nfp_net *nn) +{ + u32 bufsz, new_ctrl, update = 0; + unsigned int r; + int err; + + new_ctrl = nn->dp.ctrl; + + if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) { + nfp_net_rss_write_key(nn); + nfp_net_rss_write_itbl(nn); + nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); + update |= NFP_NET_CFG_UPDATE_RSS; + } + + if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_coalesce_write_cfg(nn); + update |= NFP_NET_CFG_UPDATE_IRQMOD; + } + + for (r = 0; r < nn->dp.num_tx_rings; r++) + nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r); + for (r = 0; r < nn->dp.num_rx_rings; r++) + nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r); + + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, + U64_MAX >> (64 - nn->dp.num_tx_rings)); + + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, + U64_MAX >> (64 - nn->dp.num_rx_rings)); + + if (nn->dp.netdev) + nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); + + nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu); + + bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA; + nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz); + + /* Enable device */ + new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; + update |= NFP_NET_CFG_UPDATE_GEN; + update |= NFP_NET_CFG_UPDATE_MSIX; + update |= NFP_NET_CFG_UPDATE_RING; + if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) + new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, update); + if (err) { + nfp_net_clear_config_and_disable(nn); + return err; + } + + nn->dp.ctrl = new_ctrl; + + for (r = 0; r < nn->dp.num_rx_rings; r++) + nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]); + + return 0; +} + +/** + * nfp_net_close_stack() - Quiesce the stack (part of close) + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_close_stack(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + unsigned int r; + + disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); + netif_carrier_off(nn->dp.netdev); + nn->link_up = false; + + for (r = 0; r < nn->dp.num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + + disable_irq(r_vec->irq_vector); + napi_disable(&r_vec->napi); + + if (r_vec->rx_ring) + cancel_work_sync(&r_vec->rx_dim.work); + + if (r_vec->tx_ring) + cancel_work_sync(&r_vec->tx_dim.work); + } + + netif_tx_disable(nn->dp.netdev); +} + +/** + * nfp_net_close_free_all() - Free all runtime resources + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_close_free_all(struct nfp_net *nn) +{ + unsigned int r; + + nfp_net_tx_rings_free(&nn->dp); + nfp_net_rx_rings_free(&nn->dp); + + for (r = 0; r < nn->dp.num_r_vecs; r++) + nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); + + nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); +} + +/** + * nfp_net_netdev_close() - Called when the device is downed + * @netdev: netdev structure + */ +static int nfp_net_netdev_close(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + + /* Step 1: Disable RX and TX rings from the Linux kernel perspective + */ + nfp_net_close_stack(nn); + + /* Step 2: Tell NFP + */ + nfp_net_clear_config_and_disable(nn); + nfp_port_configure(netdev, false); + + /* Step 3: Free resources + */ + nfp_net_close_free_all(nn); + + nn_dbg(nn, "%s down", netdev->name); + return 0; +} + +void nfp_ctrl_close(struct nfp_net *nn) +{ + int r; + + rtnl_lock(); + + for (r = 0; r < nn->dp.num_r_vecs; r++) { + disable_irq(nn->r_vecs[r].irq_vector); + tasklet_disable(&nn->r_vecs[r].tasklet); + } + + nfp_net_clear_config_and_disable(nn); + + nfp_net_close_free_all(nn); + + rtnl_unlock(); +} + +static void nfp_net_rx_dim_work(struct work_struct *work) +{ + struct nfp_net_r_vector *r_vec; + unsigned int factor, value; + struct dim_cq_moder moder; + struct nfp_net *nn; + struct dim *dim; + + dim = container_of(work, struct dim, work); + moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix); + r_vec = container_of(dim, struct nfp_net_r_vector, rx_dim); + nn = r_vec->nfp_net; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->tlv_caps.me_freq_mhz / 16; + if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts)) + return; + + /* copy RX interrupt coalesce parameters */ + value = (moder.pkts << 16) | (factor * moder.usec); + nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), value); + (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); + + dim->state = DIM_START_MEASURE; +} + +static void nfp_net_tx_dim_work(struct work_struct *work) +{ + struct nfp_net_r_vector *r_vec; + unsigned int factor, value; + struct dim_cq_moder moder; + struct nfp_net *nn; + struct dim *dim; + + dim = container_of(work, struct dim, work); + moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix); + r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim); + nn = r_vec->nfp_net; + + /* Compute factor used to convert coalesce '_usecs' parameters to + * ME timestamp ticks. There are 16 ME clock cycles for each timestamp + * count. + */ + factor = nn->tlv_caps.me_freq_mhz / 16; + if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts)) + return; + + /* copy TX interrupt coalesce parameters */ + value = (moder.pkts << 16) | (factor * moder.usec); + nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), value); + (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); + + dim->state = DIM_START_MEASURE; +} + +/** + * nfp_net_open_stack() - Start the device from stack's perspective + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_open_stack(struct nfp_net *nn) +{ + struct nfp_net_r_vector *r_vec; + unsigned int r; + + for (r = 0; r < nn->dp.num_r_vecs; r++) { + r_vec = &nn->r_vecs[r]; + + if (r_vec->rx_ring) { + INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work); + r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; + } + + if (r_vec->tx_ring) { + INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work); + r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; + } + + napi_enable(&r_vec->napi); + enable_irq(r_vec->irq_vector); + } + + netif_tx_wake_all_queues(nn->dp.netdev); + + enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); + nfp_net_read_link_status(nn); +} + +static int nfp_net_open_alloc_all(struct nfp_net *nn) +{ + int err, r; + + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", + nn->exn_name, sizeof(nn->exn_name), + NFP_NET_IRQ_EXN_IDX, nn->exn_handler); + if (err) + return err; + err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", + nn->lsc_name, sizeof(nn->lsc_name), + NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); + if (err) + goto err_free_exn; + disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); + + for (r = 0; r < nn->dp.num_r_vecs; r++) { + err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); + if (err) + goto err_cleanup_vec_p; + } + + err = nfp_net_rx_rings_prepare(nn, &nn->dp); + if (err) + goto err_cleanup_vec; + + err = nfp_net_tx_rings_prepare(nn, &nn->dp); + if (err) + goto err_free_rx_rings; + + for (r = 0; r < nn->max_r_vecs; r++) + nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); + + return 0; + +err_free_rx_rings: + nfp_net_rx_rings_free(&nn->dp); +err_cleanup_vec: + r = nn->dp.num_r_vecs; +err_cleanup_vec_p: + while (r--) + nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); + nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); +err_free_exn: + nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); + return err; +} + +static int nfp_net_netdev_open(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + int err; + + /* Step 1: Allocate resources for rings and the like + * - Request interrupts + * - Allocate RX and TX ring resources + * - Setup initial RSS table + */ + err = nfp_net_open_alloc_all(nn); + if (err) + return err; + + err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings); + if (err) + goto err_free_all; + + err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings); + if (err) + goto err_free_all; + + /* Step 2: Configure the NFP + * - Ifup the physical interface if it exists + * - Enable rings from 0 to tx_rings/rx_rings - 1. + * - Write MAC address (in case it changed) + * - Set the MTU + * - Set the Freelist buffer size + * - Enable the FW + */ + err = nfp_port_configure(netdev, true); + if (err) + goto err_free_all; + + err = nfp_net_set_config_and_enable(nn); + if (err) + goto err_port_disable; + + /* Step 3: Enable for kernel + * - put some freelist descriptors on each RX ring + * - enable NAPI on each ring + * - enable all TX queues + * - set link state + */ + nfp_net_open_stack(nn); + + return 0; + +err_port_disable: + nfp_port_configure(netdev, false); +err_free_all: + nfp_net_close_free_all(nn); + return err; +} + +int nfp_ctrl_open(struct nfp_net *nn) +{ + int err, r; + + /* ring dumping depends on vNICs being opened/closed under rtnl */ + rtnl_lock(); + + err = nfp_net_open_alloc_all(nn); + if (err) + goto err_unlock; + + err = nfp_net_set_config_and_enable(nn); + if (err) + goto err_free_all; + + for (r = 0; r < nn->dp.num_r_vecs; r++) + enable_irq(nn->r_vecs[r].irq_vector); + + rtnl_unlock(); + + return 0; + +err_free_all: + nfp_net_close_free_all(nn); +err_unlock: + rtnl_unlock(); + return err; +} + +static void nfp_net_set_rx_mode(struct net_device *netdev) +{ + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + + new_ctrl = nn->dp.ctrl; + + if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI) + new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC; + + if (netdev->flags & IFF_PROMISC) { + if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) + new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; + else + nn_warn(nn, "FW does not support promiscuous mode\n"); + } else { + new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; + } + + if (new_ctrl == nn->dp.ctrl) + return; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); + + nn->dp.ctrl = new_ctrl; +} + +static void nfp_net_rss_init_itbl(struct nfp_net *nn) +{ + int i; + + for (i = 0; i < sizeof(nn->rss_itbl); i++) + nn->rss_itbl[i] = + ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings); +} + +static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp) +{ + struct nfp_net_dp new_dp = *dp; + + *dp = nn->dp; + nn->dp = new_dp; + + nn->dp.netdev->mtu = new_dp.mtu; + + if (!netif_is_rxfh_configured(nn->dp.netdev)) + nfp_net_rss_init_itbl(nn); +} + +static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp) +{ + unsigned int r; + int err; + + nfp_net_dp_swap(nn, dp); + + for (r = 0; r < nn->max_r_vecs; r++) + nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); + + err = netif_set_real_num_queues(nn->dp.netdev, + nn->dp.num_stack_tx_rings, + nn->dp.num_rx_rings); + if (err) + return err; + + return nfp_net_set_config_and_enable(nn); +} + +struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn) +{ + struct nfp_net_dp *new; + + new = kmalloc(sizeof(*new), GFP_KERNEL); + if (!new) + return NULL; + + *new = nn->dp; + + new->xsk_pools = kmemdup(new->xsk_pools, + array_size(nn->max_r_vecs, + sizeof(new->xsk_pools)), + GFP_KERNEL); + if (!new->xsk_pools) { + kfree(new); + return NULL; + } + + /* Clear things which need to be recomputed */ + new->fl_bufsz = 0; + new->tx_rings = NULL; + new->rx_rings = NULL; + new->num_r_vecs = 0; + new->num_stack_tx_rings = 0; + new->txrwb = NULL; + new->txrwb_dma = 0; + + return new; +} + +static void nfp_net_free_dp(struct nfp_net_dp *dp) +{ + kfree(dp->xsk_pools); + kfree(dp); +} + +static int +nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, + struct netlink_ext_ack *extack) +{ + unsigned int r, xsk_min_fl_bufsz; + + /* XDP-enabled tests */ + if (!dp->xdp_prog) + return 0; + if (dp->fl_bufsz > PAGE_SIZE) { + NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled"); + return -EINVAL; + } + if (dp->num_tx_rings > nn->max_tx_rings) { + NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled"); + return -EINVAL; + } + + xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp); + for (r = 0; r < nn->max_r_vecs; r++) { + if (!dp->xsk_pools[r]) + continue; + + if (xsk_pool_get_rx_frame_size(dp->xsk_pools[r]) < xsk_min_fl_bufsz) { + NL_SET_ERR_MSG_MOD(extack, + "XSK buffer pool chunk size too small"); + return -EINVAL; + } + } + + return 0; +} + +int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, + struct netlink_ext_ack *extack) +{ + int r, err; + + dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp); + + dp->num_stack_tx_rings = dp->num_tx_rings; + if (dp->xdp_prog) + dp->num_stack_tx_rings -= dp->num_rx_rings; + + dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings); + + err = nfp_net_check_config(nn, dp, extack); + if (err) + goto exit_free_dp; + + if (!netif_running(dp->netdev)) { + nfp_net_dp_swap(nn, dp); + err = 0; + goto exit_free_dp; + } + + /* Prepare new rings */ + for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) { + err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); + if (err) { + dp->num_r_vecs = r; + goto err_cleanup_vecs; + } + } + + err = nfp_net_rx_rings_prepare(nn, dp); + if (err) + goto err_cleanup_vecs; + + err = nfp_net_tx_rings_prepare(nn, dp); + if (err) + goto err_free_rx; + + /* Stop device, swap in new rings, try to start the firmware */ + nfp_net_close_stack(nn); + nfp_net_clear_config_and_disable(nn); + + err = nfp_net_dp_swap_enable(nn, dp); + if (err) { + int err2; + + nfp_net_clear_config_and_disable(nn); + + /* Try with old configuration and old rings */ + err2 = nfp_net_dp_swap_enable(nn, dp); + if (err2) + nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", + err, err2); + } + for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) + nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); + + nfp_net_rx_rings_free(dp); + nfp_net_tx_rings_free(dp); + + nfp_net_open_stack(nn); +exit_free_dp: + nfp_net_free_dp(dp); + + return err; + +err_free_rx: + nfp_net_rx_rings_free(dp); +err_cleanup_vecs: + for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) + nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); + nfp_net_free_dp(dp); + return err; +} + +static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct nfp_net_dp *dp; + int err; + + err = nfp_app_check_mtu(nn->app, netdev, new_mtu); + if (err) + return err; + + dp = nfp_net_clone_dp(nn); + if (!dp) + return -ENOMEM; + + dp->mtu = new_mtu; + + return nfp_net_ring_reconfig(nn, dp, NULL); +} + +static int +nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) +{ + const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD; + struct nfp_net *nn = netdev_priv(netdev); + int err; + + /* Priority tagged packets with vlan id 0 are processed by the + * NFP as untagged packets + */ + if (!vid) + return 0; + + err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ); + if (err) + return err; + + nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid); + nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO, + ETH_P_8021Q); + + return nfp_net_mbox_reconfig_and_unlock(nn, cmd); +} + +static int +nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) +{ + const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL; + struct nfp_net *nn = netdev_priv(netdev); + int err; + + /* Priority tagged packets with vlan id 0 are processed by the + * NFP as untagged packets + */ + if (!vid) + return 0; + + err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ); + if (err) + return err; + + nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid); + nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO, + ETH_P_8021Q); + + return nfp_net_mbox_reconfig_and_unlock(nn, cmd); +} + +static void nfp_net_stat64(struct net_device *netdev, + struct rtnl_link_stats64 *stats) +{ + struct nfp_net *nn = netdev_priv(netdev); + int r; + + /* Collect software stats */ + for (r = 0; r < nn->max_r_vecs; r++) { + struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; + u64 data[3]; + unsigned int start; + + do { + start = u64_stats_fetch_begin_irq(&r_vec->rx_sync); + data[0] = r_vec->rx_pkts; + data[1] = r_vec->rx_bytes; + data[2] = r_vec->rx_drops; + } while (u64_stats_fetch_retry_irq(&r_vec->rx_sync, start)); + stats->rx_packets += data[0]; + stats->rx_bytes += data[1]; + stats->rx_dropped += data[2]; + + do { + start = u64_stats_fetch_begin_irq(&r_vec->tx_sync); + data[0] = r_vec->tx_pkts; + data[1] = r_vec->tx_bytes; + data[2] = r_vec->tx_errors; + } while (u64_stats_fetch_retry_irq(&r_vec->tx_sync, start)); + stats->tx_packets += data[0]; + stats->tx_bytes += data[1]; + stats->tx_errors += data[2]; + } + + /* Add in device stats */ + stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES); + stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS); + stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS); + + stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS); + stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS); +} + +static int nfp_net_set_features(struct net_device *netdev, + netdev_features_t features) +{ + netdev_features_t changed = netdev->features ^ features; + struct nfp_net *nn = netdev_priv(netdev); + u32 new_ctrl; + int err; + + /* Assume this is not called with features we have not advertised */ + + new_ctrl = nn->dp.ctrl; + + if (changed & NETIF_F_RXCSUM) { + if (features & NETIF_F_RXCSUM) + new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY; + } + + if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { + if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) + new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; + } + + if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { + if (features & (NETIF_F_TSO | NETIF_F_TSO6)) + new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: + NFP_NET_CFG_CTRL_LSO; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_RX) { + if (features & NETIF_F_HW_VLAN_CTAG_RX) + new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?: + NFP_NET_CFG_CTRL_RXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_TX) { + if (features & NETIF_F_HW_VLAN_CTAG_TX) + new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?: + NFP_NET_CFG_CTRL_TXVLAN; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY; + } + + if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { + if (features & NETIF_F_HW_VLAN_CTAG_FILTER) + new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER; + } + + if (changed & NETIF_F_HW_VLAN_STAG_RX) { + if (features & NETIF_F_HW_VLAN_STAG_RX) + new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ; + } + + if (changed & NETIF_F_SG) { + if (features & NETIF_F_SG) + new_ctrl |= NFP_NET_CFG_CTRL_GATHER; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; + } + + err = nfp_port_set_features(netdev, features); + if (err) + return err; + + nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", + netdev->features, features, changed); + + if (new_ctrl == nn->dp.ctrl) + return 0; + + nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl); + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + nn->dp.ctrl = new_ctrl; + + return 0; +} + +static netdev_features_t +nfp_net_fix_features(struct net_device *netdev, + netdev_features_t features) +{ + if ((features & NETIF_F_HW_VLAN_CTAG_RX) && + (features & NETIF_F_HW_VLAN_STAG_RX)) { + if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) { + features &= ~NETIF_F_HW_VLAN_CTAG_RX; + netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX; + netdev_warn(netdev, + "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n"); + } else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) { + features &= ~NETIF_F_HW_VLAN_STAG_RX; + netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX; + netdev_warn(netdev, + "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n"); + } + } + return features; +} + +static netdev_features_t +nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, + netdev_features_t features) +{ + u8 l4_hdr; + + /* We can't do TSO over double tagged packets (802.1AD) */ + features &= vlan_features_check(skb, features); + + if (!skb->encapsulation) + return features; + + /* Ensure that inner L4 header offset fits into TX descriptor field */ + if (skb_is_gso(skb)) { + u32 hdrlen; + + hdrlen = skb_inner_tcp_all_headers(skb); + + /* Assume worst case scenario of having longest possible + * metadata prepend - 8B + */ + if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8)) + features &= ~NETIF_F_GSO_MASK; + } + + /* VXLAN/GRE check */ + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_hdr = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_hdr = ipv6_hdr(skb)->nexthdr; + break; + default: + return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); + } + + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || + skb->inner_protocol != htons(ETH_P_TEB) || + (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || + (l4_hdr == IPPROTO_UDP && + (skb_inner_mac_header(skb) - skb_transport_header(skb) != + sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) + return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); + + return features; +} + +static int +nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len) +{ + struct nfp_net *nn = netdev_priv(netdev); + int n; + + /* If port is defined, devlink_port is registered and devlink core + * is taking care of name formatting. + */ + if (nn->port) + return -EOPNOTSUPP; + + if (nn->dp.is_vf || nn->vnic_no_name) + return -EOPNOTSUPP; + + n = snprintf(name, len, "n%d", nn->id); + if (n >= len) + return -EINVAL; + + return 0; +} + +static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf) +{ + struct bpf_prog *prog = bpf->prog; + struct nfp_net_dp *dp; + int err; + + if (!prog == !nn->dp.xdp_prog) { + WRITE_ONCE(nn->dp.xdp_prog, prog); + xdp_attachment_setup(&nn->xdp, bpf); + return 0; + } + + dp = nfp_net_clone_dp(nn); + if (!dp) + return -ENOMEM; + + dp->xdp_prog = prog; + dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings; + dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; + dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0; + + /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */ + err = nfp_net_ring_reconfig(nn, dp, bpf->extack); + if (err) + return err; + + xdp_attachment_setup(&nn->xdp, bpf); + return 0; +} + +static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf) +{ + int err; + + err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack); + if (err) + return err; + + xdp_attachment_setup(&nn->xdp_hw, bpf); + return 0; +} + +static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp) +{ + struct nfp_net *nn = netdev_priv(netdev); + + switch (xdp->command) { + case XDP_SETUP_PROG: + return nfp_net_xdp_setup_drv(nn, xdp); + case XDP_SETUP_PROG_HW: + return nfp_net_xdp_setup_hw(nn, xdp); + case XDP_SETUP_XSK_POOL: + return nfp_net_xsk_setup_pool(netdev, xdp->xsk.pool, + xdp->xsk.queue_id); + default: + return nfp_app_bpf(nn->app, nn, xdp); + } +} + +static int nfp_net_set_mac_address(struct net_device *netdev, void *addr) +{ + struct nfp_net *nn = netdev_priv(netdev); + struct sockaddr *saddr = addr; + int err; + + err = eth_prepare_mac_addr_change(netdev, addr); + if (err) + return err; + + nfp_net_write_mac_addr(nn, saddr->sa_data); + + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR); + if (err) + return err; + + eth_commit_mac_addr_change(netdev, addr); + + return 0; +} + +static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, + struct net_device *dev, u32 filter_mask, + int nlflags) +{ + struct nfp_net *nn = netdev_priv(dev); + u16 mode; + + if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA)) + return -EOPNOTSUPP; + + mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ? + BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB; + + return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0, + nlflags, filter_mask, NULL); +} + +static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh, + u16 flags, struct netlink_ext_ack *extack) +{ + struct nfp_net *nn = netdev_priv(dev); + struct nlattr *attr, *br_spec; + int rem, err; + u32 new_ctrl; + u16 mode; + + if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA)) + return -EOPNOTSUPP; + + br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); + if (!br_spec) + return -EINVAL; + + nla_for_each_nested(attr, br_spec, rem) { + if (nla_type(attr) != IFLA_BRIDGE_MODE) + continue; + + if (nla_len(attr) < sizeof(mode)) + return -EINVAL; + + new_ctrl = nn->dp.ctrl; + mode = nla_get_u16(attr); + if (mode == BRIDGE_MODE_VEPA) + new_ctrl |= NFP_NET_CFG_CTRL_VEPA; + else if (mode == BRIDGE_MODE_VEB) + new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA; + else + return -EOPNOTSUPP; + + if (new_ctrl == nn->dp.ctrl) + return 0; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); + if (!err) + nn->dp.ctrl = new_ctrl; + + return err; + } + + return -EINVAL; +} + +const struct net_device_ops nfp_nfd3_netdev_ops = { + .ndo_init = nfp_app_ndo_init, + .ndo_uninit = nfp_app_ndo_uninit, + .ndo_open = nfp_net_netdev_open, + .ndo_stop = nfp_net_netdev_close, + .ndo_start_xmit = nfp_net_tx, + .ndo_get_stats64 = nfp_net_stat64, + .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, + .ndo_set_vf_mac = nfp_app_set_vf_mac, + .ndo_set_vf_vlan = nfp_app_set_vf_vlan, + .ndo_set_vf_rate = nfp_app_set_vf_rate, + .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, + .ndo_set_vf_trust = nfp_app_set_vf_trust, + .ndo_get_vf_config = nfp_app_get_vf_config, + .ndo_set_vf_link_state = nfp_app_set_vf_link_state, + .ndo_setup_tc = nfp_port_setup_tc, + .ndo_tx_timeout = nfp_net_tx_timeout, + .ndo_set_rx_mode = nfp_net_set_rx_mode, + .ndo_change_mtu = nfp_net_change_mtu, + .ndo_set_mac_address = nfp_net_set_mac_address, + .ndo_set_features = nfp_net_set_features, + .ndo_fix_features = nfp_net_fix_features, + .ndo_features_check = nfp_net_features_check, + .ndo_get_phys_port_name = nfp_net_get_phys_port_name, + .ndo_bpf = nfp_net_xdp, + .ndo_xsk_wakeup = nfp_net_xsk_wakeup, + .ndo_get_devlink_port = nfp_devlink_get_devlink_port, + .ndo_bridge_getlink = nfp_net_bridge_getlink, + .ndo_bridge_setlink = nfp_net_bridge_setlink, +}; + +const struct net_device_ops nfp_nfdk_netdev_ops = { + .ndo_init = nfp_app_ndo_init, + .ndo_uninit = nfp_app_ndo_uninit, + .ndo_open = nfp_net_netdev_open, + .ndo_stop = nfp_net_netdev_close, + .ndo_start_xmit = nfp_net_tx, + .ndo_get_stats64 = nfp_net_stat64, + .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, + .ndo_set_vf_mac = nfp_app_set_vf_mac, + .ndo_set_vf_vlan = nfp_app_set_vf_vlan, + .ndo_set_vf_rate = nfp_app_set_vf_rate, + .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, + .ndo_set_vf_trust = nfp_app_set_vf_trust, + .ndo_get_vf_config = nfp_app_get_vf_config, + .ndo_set_vf_link_state = nfp_app_set_vf_link_state, + .ndo_setup_tc = nfp_port_setup_tc, + .ndo_tx_timeout = nfp_net_tx_timeout, + .ndo_set_rx_mode = nfp_net_set_rx_mode, + .ndo_change_mtu = nfp_net_change_mtu, + .ndo_set_mac_address = nfp_net_set_mac_address, + .ndo_set_features = nfp_net_set_features, + .ndo_fix_features = nfp_net_fix_features, + .ndo_features_check = nfp_net_features_check, + .ndo_get_phys_port_name = nfp_net_get_phys_port_name, + .ndo_bpf = nfp_net_xdp, + .ndo_get_devlink_port = nfp_devlink_get_devlink_port, + .ndo_bridge_getlink = nfp_net_bridge_getlink, + .ndo_bridge_setlink = nfp_net_bridge_setlink, +}; + +static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table) +{ + struct nfp_net *nn = netdev_priv(netdev); + int i; + + BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); + for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) { + struct udp_tunnel_info ti0, ti1; + + udp_tunnel_nic_get_port(netdev, table, i, &ti0); + udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1); + + nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port), + be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port)); + } + + return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN); +} + +static const struct udp_tunnel_nic_info nfp_udp_tunnels = { + .sync_table = nfp_udp_tunnel_sync, + .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP | + UDP_TUNNEL_NIC_INFO_OPEN_ONLY, + .tables = { + { + .n_entries = NFP_NET_N_VXLAN_PORTS, + .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, + }, + }, +}; + +/** + * nfp_net_info() - Print general info about the NIC + * @nn: NFP Net device to reconfigure + */ +void nfp_net_info(struct nfp_net *nn) +{ + nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", + nn->dp.is_vf ? "VF " : "", + nn->dp.num_tx_rings, nn->max_tx_rings, + nn->dp.num_rx_rings, nn->max_rx_rings); + nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", + nn->fw_ver.extend, nn->fw_ver.class, + nn->fw_ver.major, nn->fw_ver.minor, + nn->max_mtu); + nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + nn->cap, + nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", + nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", + nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", + nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_RXQINQ ? "RXQINQ " : "", + nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 " : "", + nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ? "TXVLANv2 " : "", + nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", + nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", + nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "", + nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "", + nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "", + nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "", + nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "", + nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", + nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", + nn->cap & NFP_NET_CFG_CTRL_TXRWB ? "TXRWB " : "", + nn->cap & NFP_NET_CFG_CTRL_VEPA ? "VEPA " : "", + nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "", + nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ? + "RXCSUM_COMPLETE " : "", + nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "", + nfp_app_extra_cap(nn->app, nn)); +} + +/** + * nfp_net_alloc() - Allocate netdev and related structure + * @pdev: PCI device + * @dev_info: NFP ASIC params + * @ctrl_bar: PCI IOMEM with vNIC config memory + * @needs_netdev: Whether to allocate a netdev for this vNIC + * @max_tx_rings: Maximum number of TX rings supported by device + * @max_rx_rings: Maximum number of RX rings supported by device + * + * This function allocates a netdev device and fills in the initial + * part of the @struct nfp_net structure. In case of control device + * nfp_net structure is allocated without the netdev. + * + * Return: NFP Net device structure, or ERR_PTR on error. + */ +struct nfp_net * +nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info, + void __iomem *ctrl_bar, bool needs_netdev, + unsigned int max_tx_rings, unsigned int max_rx_rings) +{ + u64 dma_mask = dma_get_mask(&pdev->dev); + struct nfp_net *nn; + int err; + + if (needs_netdev) { + struct net_device *netdev; + + netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), + max_tx_rings, max_rx_rings); + if (!netdev) + return ERR_PTR(-ENOMEM); + + SET_NETDEV_DEV(netdev, &pdev->dev); + nn = netdev_priv(netdev); + nn->dp.netdev = netdev; + } else { + nn = vzalloc(sizeof(*nn)); + if (!nn) + return ERR_PTR(-ENOMEM); + } + + nn->dp.dev = &pdev->dev; + nn->dp.ctrl_bar = ctrl_bar; + nn->dev_info = dev_info; + nn->pdev = pdev; + nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar); + + switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) { + case NFP_NET_CFG_VERSION_DP_NFD3: + nn->dp.ops = &nfp_nfd3_ops; + break; + case NFP_NET_CFG_VERSION_DP_NFDK: + if (nn->fw_ver.major < 5) { + dev_err(&pdev->dev, + "NFDK must use ABI 5 or newer, found: %d\n", + nn->fw_ver.major); + err = -EINVAL; + goto err_free_nn; + } + nn->dp.ops = &nfp_nfdk_ops; + break; + default: + err = -EINVAL; + goto err_free_nn; + } + + if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) { + dev_err(&pdev->dev, + "DMA mask of loaded firmware: %llx, required DMA mask: %llx\n", + nn->dp.ops->dma_mask, dma_mask); + err = -EINVAL; + goto err_free_nn; + } + + nn->max_tx_rings = max_tx_rings; + nn->max_rx_rings = max_rx_rings; + + nn->dp.num_tx_rings = min_t(unsigned int, + max_tx_rings, num_online_cpus()); + nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings, + netif_get_num_default_rss_queues()); + + nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings); + nn->dp.num_r_vecs = min_t(unsigned int, + nn->dp.num_r_vecs, num_online_cpus()); + nn->max_r_vecs = nn->dp.num_r_vecs; + + nn->dp.xsk_pools = kcalloc(nn->max_r_vecs, sizeof(nn->dp.xsk_pools), + GFP_KERNEL); + if (!nn->dp.xsk_pools) { + err = -ENOMEM; + goto err_free_nn; + } + + nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT; + nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; + + sema_init(&nn->bar_lock, 1); + + spin_lock_init(&nn->reconfig_lock); + spin_lock_init(&nn->link_status_lock); + + timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0); + + err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar, + &nn->tlv_caps); + if (err) + goto err_free_nn; + + err = nfp_ccm_mbox_alloc(nn); + if (err) + goto err_free_nn; + + return nn; + +err_free_nn: + if (nn->dp.netdev) + free_netdev(nn->dp.netdev); + else + vfree(nn); + return ERR_PTR(err); +} + +/** + * nfp_net_free() - Undo what @nfp_net_alloc() did + * @nn: NFP Net device to reconfigure + */ +void nfp_net_free(struct nfp_net *nn) +{ + WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted); + nfp_ccm_mbox_free(nn); + + kfree(nn->dp.xsk_pools); + if (nn->dp.netdev) + free_netdev(nn->dp.netdev); + else + vfree(nn); +} + +/** + * nfp_net_rss_key_sz() - Get current size of the RSS key + * @nn: NFP Net device instance + * + * Return: size of the RSS key for currently selected hash function. + */ +unsigned int nfp_net_rss_key_sz(struct nfp_net *nn) +{ + switch (nn->rss_hfunc) { + case ETH_RSS_HASH_TOP: + return NFP_NET_CFG_RSS_KEY_SZ; + case ETH_RSS_HASH_XOR: + return 0; + case ETH_RSS_HASH_CRC32: + return 4; + } + + nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc); + return 0; +} + +/** + * nfp_net_rss_init() - Set the initial RSS parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_rss_init(struct nfp_net *nn) +{ + unsigned long func_bit, rss_cap_hfunc; + u32 reg; + + /* Read the RSS function capability and select first supported func */ + reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP); + rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg); + if (!rss_cap_hfunc) + rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, + NFP_NET_CFG_RSS_TOEPLITZ); + + func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS); + if (func_bit == NFP_NET_CFG_RSS_HFUNCS) { + dev_warn(nn->dp.dev, + "Bad RSS config, defaulting to Toeplitz hash\n"); + func_bit = ETH_RSS_HASH_TOP_BIT; + } + nn->rss_hfunc = 1 << func_bit; + + netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn)); + + nfp_net_rss_init_itbl(nn); + + /* Enable IPv4/IPv6 TCP by default */ + nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | + NFP_NET_CFG_RSS_IPV6_TCP | + FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) | + NFP_NET_CFG_RSS_MASK; +} + +/** + * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters + * @nn: NFP Net device to reconfigure + */ +static void nfp_net_irqmod_init(struct nfp_net *nn) +{ + nn->rx_coalesce_usecs = 50; + nn->rx_coalesce_max_frames = 64; + nn->tx_coalesce_usecs = 50; + nn->tx_coalesce_max_frames = 64; + + nn->rx_coalesce_adapt_on = true; + nn->tx_coalesce_adapt_on = true; +} + +static void nfp_net_netdev_init(struct nfp_net *nn) +{ + struct net_device *netdev = nn->dp.netdev; + + nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); + + netdev->mtu = nn->dp.mtu; + + /* Advertise/enable offloads based on capabilities + * + * Note: netdev->features show the currently enabled features + * and netdev->hw_features advertises which features are + * supported. By default we enable most features. + */ + if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR) + netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; + + netdev->hw_features = NETIF_F_HIGHDMA; + if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) { + netdev->hw_features |= NETIF_F_RXCSUM; + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { + netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM; + } + if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { + netdev->hw_features |= NETIF_F_SG; + nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER; + } + if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) || + nn->cap & NFP_NET_CFG_CTRL_LSO2) { + netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: + NFP_NET_CFG_CTRL_LSO; + } + if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) + netdev->hw_features |= NETIF_F_RXHASH; + if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) { + if (nn->cap & NFP_NET_CFG_CTRL_LSO) { + netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL | + NETIF_F_GSO_UDP_TUNNEL_CSUM | + NETIF_F_GSO_PARTIAL; + netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM; + } + netdev->udp_tunnel_nic_info = &nfp_udp_tunnels; + nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN; + } + if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) { + if (nn->cap & NFP_NET_CFG_CTRL_LSO) + netdev->hw_features |= NETIF_F_GSO_GRE; + nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE; + } + if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE)) + netdev->hw_enc_features = netdev->hw_features; + + netdev->vlan_features = netdev->hw_features; + + if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN_ANY) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?: + NFP_NET_CFG_CTRL_RXVLAN; + } + if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) { + if (nn->cap & NFP_NET_CFG_CTRL_LSO2) { + nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n"); + } else { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?: + NFP_NET_CFG_CTRL_TXVLAN; + } + } + if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) { + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; + nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; + } + if (nn->cap & NFP_NET_CFG_CTRL_RXQINQ) { + netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX; + nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXQINQ; + } + + netdev->features = netdev->hw_features; + + if (nfp_app_has_tc(nn->app) && nn->port) + netdev->hw_features |= NETIF_F_HW_TC; + + /* C-Tag strip and S-Tag strip can't be supported simultaneously, + * so enable C-Tag strip and disable S-Tag strip by default. + */ + netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX; + nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ; + + /* Finalise the netdev setup */ + switch (nn->dp.ops->version) { + case NFP_NFD_VER_NFD3: + netdev->netdev_ops = &nfp_nfd3_netdev_ops; + break; + case NFP_NFD_VER_NFDK: + netdev->netdev_ops = &nfp_nfdk_netdev_ops; + break; + } + + netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); + + /* MTU range: 68 - hw-specific max */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = nn->max_mtu; + + netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS); + + netif_carrier_off(netdev); + + nfp_net_set_ethtool_ops(netdev); +} + +static int nfp_net_read_caps(struct nfp_net *nn) +{ + /* Get some of the read-only fields from the BAR */ + nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); + nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); + + /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases + * we allow use of non-chained metadata if RSS(v1) is the only + * advertised capability requiring metadata. + */ + nn->dp.chained_metadata_format = nn->fw_ver.major == 4 || + !nn->dp.netdev || + !(nn->cap & NFP_NET_CFG_CTRL_RSS) || + nn->cap & NFP_NET_CFG_CTRL_CHAIN_META; + /* RSS(v1) uses non-chained metadata format, except in ABI 4.x where + * it has the same meaning as RSSv2. + */ + if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4) + nn->cap &= ~NFP_NET_CFG_CTRL_RSS; + + /* Determine RX packet/metadata boundary offset */ + if (nn->fw_ver.major >= 2) { + u32 reg; + + reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); + if (reg > NFP_NET_MAX_PREPEND) { + nn_err(nn, "Invalid rx offset: %d\n", reg); + return -EINVAL; + } + nn->dp.rx_offset = reg; + } else { + nn->dp.rx_offset = NFP_NET_RX_OFFSET; + } + + /* Mask out NFD-version-specific features */ + nn->cap &= nn->dp.ops->cap_mask; + + /* For control vNICs mask out the capabilities app doesn't want. */ + if (!nn->dp.netdev) + nn->cap &= nn->app->type->ctrl_cap_mask; + + return 0; +} + +/** + * nfp_net_init() - Initialise/finalise the nfp_net structure + * @nn: NFP Net device structure + * + * Return: 0 on success or negative errno on error. + */ +int nfp_net_init(struct nfp_net *nn) +{ + int err; + + nn->dp.rx_dma_dir = DMA_FROM_DEVICE; + + err = nfp_net_read_caps(nn); + if (err) + return err; + + /* Set default MTU and Freelist buffer size */ + if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) { + nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu); + } else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) { + nn->dp.mtu = nn->max_mtu; + } else { + nn->dp.mtu = NFP_NET_DEFAULT_MTU; + } + nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp); + + if (nfp_app_ctrl_uses_data_vnics(nn->app)) + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA; + + if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) { + nfp_net_rss_init(nn); + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?: + NFP_NET_CFG_CTRL_RSS; + } + + /* Allow L2 Broadcast and Multicast through by default, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_L2BC) + nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC; + + /* Allow IRQ moderation, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { + nfp_net_irqmod_init(nn); + nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD; + } + + /* Enable TX pointer writeback, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_TXRWB) + nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXRWB; + + /* Stash the re-configuration queue away. First odd queue in TX Bar */ + nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; + + /* Make sure the FW knows the netdev is supposed to be disabled here */ + nn_writel(nn, NFP_NET_CFG_CTRL, 0); + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | + NFP_NET_CFG_UPDATE_GEN); + if (err) + return err; + + if (nn->dp.netdev) { + nfp_net_netdev_init(nn); + + err = nfp_ccm_mbox_init(nn); + if (err) + return err; + + err = nfp_net_tls_init(nn); + if (err) + goto err_clean_mbox; + } + + nfp_net_vecs_init(nn); + + if (!nn->dp.netdev) + return 0; + return register_netdev(nn->dp.netdev); + +err_clean_mbox: + nfp_ccm_mbox_clean(nn); + return err; +} + +/** + * nfp_net_clean() - Undo what nfp_net_init() did. + * @nn: NFP Net device structure + */ +void nfp_net_clean(struct nfp_net *nn) +{ + if (!nn->dp.netdev) + return; + + unregister_netdev(nn->dp.netdev); + nfp_ccm_mbox_clean(nn); + nfp_net_reconfig_wait_posted(nn); +} |