| // 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/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; |
| u32 sts; |
| |
| spin_lock_irqsave(&nn->link_status_lock, flags); |
| |
| sts = nn_readl(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->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_transport_offset(skb) + tcp_hdrlen(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_transport_offset(skb) + tcp_hdrlen(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, |
| NAPI_POLL_WEIGHT); |
| 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(&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(&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(&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(&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 |= NFP_NET_CFG_CTRL_RXVLAN; |
| else |
| new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; |
| } |
| |
| if (changed & NETIF_F_HW_VLAN_CTAG_TX) { |
| if (features & NETIF_F_HW_VLAN_CTAG_TX) |
| new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; |
| else |
| new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; |
| } |
| |
| 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_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_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_transport_header(skb) - skb->data + |
| inner_tcp_hdrlen(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; |
| } |
| |
| 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_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, |
| }; |
| |
| 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_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_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, |
| }; |
| |
| 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\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_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_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) |
| { |
| 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; |
| } |
| |
| 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) { |
| netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; |
| nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXVLAN; |
| } |
| if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { |
| 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 |= 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; |
| } |
| |
| netdev->features = netdev->hw_features; |
| |
| if (nfp_app_has_tc(nn->app) && nn->port) |
| netdev->hw_features |= NETIF_F_HW_TC; |
| |
| /* Advertise but disable TSO by default. */ |
| netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); |
| nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
| |
| /* 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); |
| } |