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1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */2/* Copyright (C) 2015-2018 Netronome Systems, Inc. */3 4/*5 * nfp_net.h6 * Declarations for Netronome network device driver.7 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>8 * Jason McMullan <jason.mcmullan@netronome.com>9 * Rolf Neugebauer <rolf.neugebauer@netronome.com>10 */11 12#ifndef _NFP_NET_H_13#define _NFP_NET_H_14 15#include <linux/atomic.h>16#include <linux/interrupt.h>17#include <linux/list.h>18#include <linux/netdevice.h>19#include <linux/pci.h>20#include <linux/dim.h>21#include <linux/io-64-nonatomic-hi-lo.h>22#include <linux/semaphore.h>23#include <linux/workqueue.h>24#include <net/xdp.h>25 26#include "nfp_net_ctrl.h"27 28#define nn_pr(nn, lvl, fmt, args...) \29 ({ \30 struct nfp_net *__nn = (nn); \31 \32 if (__nn->dp.netdev) \33 netdev_printk(lvl, __nn->dp.netdev, fmt, ## args); \34 else \35 dev_printk(lvl, __nn->dp.dev, "ctrl: " fmt, ## args); \36 })37 38#define nn_err(nn, fmt, args...) nn_pr(nn, KERN_ERR, fmt, ## args)39#define nn_warn(nn, fmt, args...) nn_pr(nn, KERN_WARNING, fmt, ## args)40#define nn_info(nn, fmt, args...) nn_pr(nn, KERN_INFO, fmt, ## args)41#define nn_dbg(nn, fmt, args...) nn_pr(nn, KERN_DEBUG, fmt, ## args)42 43#define nn_dp_warn(dp, fmt, args...) \44 ({ \45 struct nfp_net_dp *__dp = (dp); \46 \47 if (unlikely(net_ratelimit())) { \48 if (__dp->netdev) \49 netdev_warn(__dp->netdev, fmt, ## args); \50 else \51 dev_warn(__dp->dev, fmt, ## args); \52 } \53 })54 55/* Max time to wait for NFP to respond on updates (in seconds) */56#define NFP_NET_POLL_TIMEOUT 557 58/* Interval for reading offloaded filter stats */59#define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100)60 61/* Bar allocation */62#define NFP_NET_CTRL_BAR 063#define NFP_NET_Q0_BAR 264#define NFP_NET_Q1_BAR 4 /* OBSOLETE */65 66/* Default size for MTU and freelist buffer sizes */67#define NFP_NET_DEFAULT_MTU 1500U68 69/* Maximum number of bytes prepended to a packet */70#define NFP_NET_MAX_PREPEND 6471 72/* Interrupt definitions */73#define NFP_NET_NON_Q_VECTORS 274#define NFP_NET_IRQ_LSC_IDX 075#define NFP_NET_IRQ_EXN_IDX 176#define NFP_NET_MIN_VNIC_IRQS (NFP_NET_NON_Q_VECTORS + 1)77 78/* Queue/Ring definitions */79#define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */80#define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */81#define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \82 NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS)83#define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS)84 85#define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */86#define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */87 88#define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */89#define NFP_NET_XDP_MAX_COMPLETE 2048 /* XDP bufs to reclaim in NAPI poll */90 91/* MC definitions */92#define NFP_NET_CFG_MAC_MC_MAX 1024 /* The maximum number of MC address per port*/93 94/* Offload definitions */95#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16))96 97#define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)98#define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \99 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))100 101/* Forward declarations */102struct nfp_cpp;103struct nfp_dev_info;104struct nfp_dp_ops;105struct nfp_eth_table_port;106struct nfp_net;107struct nfp_net_r_vector;108struct nfp_port;109struct xsk_buff_pool;110 111struct nfp_nfd3_tx_desc;112struct nfp_nfd3_tx_buf;113 114struct nfp_nfdk_tx_desc;115struct nfp_nfdk_tx_buf;116 117/* Convenience macro for wrapping descriptor index on ring size */118#define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1))119 120/* Convenience macro for writing dma address into RX/TX descriptors */121#define nfp_desc_set_dma_addr_40b(desc, dma_addr) \122 do { \123 __typeof__(desc) __d = (desc); \124 dma_addr_t __addr = (dma_addr); \125 \126 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \127 __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \128 } while (0)129 130#define nfp_desc_set_dma_addr_48b(desc, dma_addr) \131 do { \132 __typeof__(desc) __d = (desc); \133 dma_addr_t __addr = (dma_addr); \134 \135 __d->dma_addr_hi = cpu_to_le16(upper_32_bits(__addr)); \136 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \137 } while (0)138 139/**140 * struct nfp_net_tx_ring - TX ring structure141 * @r_vec: Back pointer to ring vector structure142 * @idx: Ring index from Linux's perspective143 * @data_pending: number of bytes added to current block (NFDK only)144 * @qcp_q: Pointer to base of the QCP TX queue145 * @txrwb: TX pointer write back area146 * @cnt: Size of the queue in number of descriptors147 * @wr_p: TX ring write pointer (free running)148 * @rd_p: TX ring read pointer (free running)149 * @qcp_rd_p: Local copy of QCP TX queue read pointer150 * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer151 * (used for .xmit_more delayed kick)152 * @txbufs: Array of transmitted TX buffers, to free on transmit (NFD3)153 * @ktxbufs: Array of transmitted TX buffers, to free on transmit (NFDK)154 * @txds: Virtual address of TX ring in host memory (NFD3)155 * @ktxds: Virtual address of TX ring in host memory (NFDK)156 *157 * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue158 * @dma: DMA address of the TX ring159 * @size: Size, in bytes, of the TX ring (needed to free)160 * @is_xdp: Is this a XDP TX ring?161 */162struct nfp_net_tx_ring {163 struct nfp_net_r_vector *r_vec;164 165 u16 idx;166 u16 data_pending;167 u8 __iomem *qcp_q;168 u64 *txrwb;169 170 u32 cnt;171 u32 wr_p;172 u32 rd_p;173 u32 qcp_rd_p;174 175 u32 wr_ptr_add;176 177 union {178 struct nfp_nfd3_tx_buf *txbufs;179 struct nfp_nfdk_tx_buf *ktxbufs;180 };181 union {182 struct nfp_nfd3_tx_desc *txds;183 struct nfp_nfdk_tx_desc *ktxds;184 };185 186 /* Cold data follows */187 int qcidx;188 189 dma_addr_t dma;190 size_t size;191 bool is_xdp;192} ____cacheline_aligned;193 194/* RX and freelist descriptor format */195 196#define PCIE_DESC_RX_DD BIT(7)197#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0)198 199/* Flags in the RX descriptor */200#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15))201#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14))202#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13))203#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12))204#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11))205#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10))206#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9))207#define PCIE_DESC_RX_DECRYPTED cpu_to_le16(BIT(8))208#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7))209#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6))210#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5))211#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4))212#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3))213#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2))214#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1))215#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0))216 217#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \218 PCIE_DESC_RX_TCP_CSUM | \219 PCIE_DESC_RX_UDP_CSUM | \220 PCIE_DESC_RX_I_IP4_CSUM | \221 PCIE_DESC_RX_I_TCP_CSUM | \222 PCIE_DESC_RX_I_UDP_CSUM)223#define PCIE_DESC_RX_CSUM_OK_SHIFT 1224#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL)225#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \226 PCIE_DESC_RX_CSUM_OK_SHIFT)227 228struct nfp_net_rx_desc {229 union {230 struct {231 __le16 dma_addr_hi; /* High bits of the buf address */232 u8 reserved; /* Must be zero */233 u8 meta_len_dd; /* Must be zero */234 235 __le32 dma_addr_lo; /* Low bits of the buffer address */236 } __packed fld;237 238 struct {239 __le16 data_len; /* Length of the frame + meta data */240 u8 reserved;241 u8 meta_len_dd; /* Length of meta data prepended +242 * descriptor done flag.243 */244 245 __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */246 __le16 vlan; /* VLAN if stripped */247 } __packed rxd;248 249 __le32 vals[2];250 };251};252 253#define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0)254#define NFP_NET_VLAN_CTAG 0255#define NFP_NET_VLAN_STAG 1256 257struct nfp_meta_parsed {258 u8 hash_type;259 u8 csum_type;260 u32 hash;261 u32 mark;262 u32 portid;263 __wsum csum;264 struct {265 bool stripped;266 u8 tpid;267 u16 tci;268 } vlan;269 270#ifdef CONFIG_NFP_NET_IPSEC271 u32 ipsec_saidx;272#endif273};274 275struct nfp_net_rx_hash {276 __be32 hash_type;277 __be32 hash;278};279 280/**281 * struct nfp_net_rx_buf - software RX buffer descriptor282 * @frag: page fragment buffer283 * @dma_addr: DMA mapping address of the buffer284 */285struct nfp_net_rx_buf {286 void *frag;287 dma_addr_t dma_addr;288};289 290/**291 * struct nfp_net_xsk_rx_buf - software RX XSK buffer descriptor292 * @dma_addr: DMA mapping address of the buffer293 * @xdp: XSK buffer pool handle (for AF_XDP)294 */295struct nfp_net_xsk_rx_buf {296 dma_addr_t dma_addr;297 struct xdp_buff *xdp;298};299 300/**301 * struct nfp_net_rx_ring - RX ring structure302 * @r_vec: Back pointer to ring vector structure303 * @cnt: Size of the queue in number of descriptors304 * @wr_p: FL/RX ring write pointer (free running)305 * @rd_p: FL/RX ring read pointer (free running)306 * @idx: Ring index from Linux's perspective307 * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist308 * @qcp_fl: Pointer to base of the QCP freelist queue309 * @rxbufs: Array of transmitted FL/RX buffers310 * @xsk_rxbufs: Array of transmitted FL/RX buffers (for AF_XDP)311 * @rxds: Virtual address of FL/RX ring in host memory312 * @xdp_rxq: RX-ring info avail for XDP313 * @dma: DMA address of the FL/RX ring314 * @size: Size, in bytes, of the FL/RX ring (needed to free)315 */316struct nfp_net_rx_ring {317 struct nfp_net_r_vector *r_vec;318 319 u32 cnt;320 u32 wr_p;321 u32 rd_p;322 323 u32 idx;324 325 int fl_qcidx;326 u8 __iomem *qcp_fl;327 328 struct nfp_net_rx_buf *rxbufs;329 struct nfp_net_xsk_rx_buf *xsk_rxbufs;330 struct nfp_net_rx_desc *rxds;331 332 struct xdp_rxq_info xdp_rxq;333 334 dma_addr_t dma;335 size_t size;336} ____cacheline_aligned;337 338/**339 * struct nfp_net_r_vector - Per ring interrupt vector configuration340 * @nfp_net: Backpointer to nfp_net structure341 * @napi: NAPI structure for this ring vec342 * @tasklet: ctrl vNIC, tasklet for servicing the r_vec343 * @queue: ctrl vNIC, send queue344 * @lock: ctrl vNIC, r_vec lock protects @queue345 * @tx_ring: Pointer to TX ring346 * @rx_ring: Pointer to RX ring347 * @xdp_ring: Pointer to an extra TX ring for XDP348 * @xsk_pool: XSK buffer pool active on vector queue pair (for AF_XDP)349 * @irq_entry: MSI-X table entry (use for talking to the device)350 * @event_ctr: Number of interrupt351 * @rx_dim: Dynamic interrupt moderation structure for RX352 * @tx_dim: Dynamic interrupt moderation structure for TX353 * @rx_sync: Seqlock for atomic updates of RX stats354 * @rx_pkts: Number of received packets355 * @rx_bytes: Number of received bytes356 * @rx_drops: Number of packets dropped on RX due to lack of resources357 * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK358 * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK359 * @hw_csum_rx_complete: Counter of packets with CHECKSUM_COMPLETE reported360 * @hw_csum_rx_error: Counter of packets with bad checksums361 * @hw_tls_rx: Number of packets with TLS decrypted by hardware362 * @tx_sync: Seqlock for atomic updates of TX stats363 * @tx_pkts: Number of Transmitted packets364 * @tx_bytes: Number of Transmitted bytes365 * @hw_csum_tx: Counter of packets with TX checksum offload requested366 * @hw_csum_tx_inner: Counter of inner TX checksum offload requests367 * @tx_gather: Counter of packets with Gather DMA368 * @tx_lso: Counter of LSO packets sent369 * @hw_tls_tx: Counter of TLS packets sent with crypto offloaded to HW370 * @tls_tx_fallback: Counter of TLS packets sent which had to be encrypted371 * by the fallback path because packets came out of order372 * @tls_tx_no_fallback: Counter of TLS packets not sent because the fallback373 * path could not encrypt them374 * @tx_errors: How many TX errors were encountered375 * @tx_busy: How often was TX busy (no space)?376 * @rx_replace_buf_alloc_fail: Counter of RX buffer allocation failures377 * @irq_vector: Interrupt vector number (use for talking to the OS)378 * @handler: Interrupt handler for this ring vector379 * @name: Name of the interrupt vector380 * @affinity_mask: SMP affinity mask for this vector381 *382 * This structure ties RX and TX rings to interrupt vectors and a NAPI383 * context. This currently only supports one RX and TX ring per384 * interrupt vector but might be extended in the future to allow385 * association of multiple rings per vector.386 */387struct nfp_net_r_vector {388 struct nfp_net *nfp_net;389 union {390 struct napi_struct napi;391 struct {392 struct tasklet_struct tasklet;393 struct sk_buff_head queue;394 spinlock_t lock;395 };396 };397 398 struct nfp_net_tx_ring *tx_ring;399 struct nfp_net_rx_ring *rx_ring;400 401 u16 irq_entry;402 403 u16 event_ctr;404 struct dim rx_dim;405 struct dim tx_dim;406 407 struct u64_stats_sync rx_sync;408 u64 rx_pkts;409 u64 rx_bytes;410 u64 rx_drops;411 u64 hw_csum_rx_ok;412 u64 hw_csum_rx_inner_ok;413 u64 hw_csum_rx_complete;414 u64 hw_tls_rx;415 416 u64 hw_csum_rx_error;417 u64 rx_replace_buf_alloc_fail;418 419 struct nfp_net_tx_ring *xdp_ring;420 struct xsk_buff_pool *xsk_pool;421 422 struct u64_stats_sync tx_sync;423 u64 tx_pkts;424 u64 tx_bytes;425 426 u64 ____cacheline_aligned_in_smp hw_csum_tx;427 u64 hw_csum_tx_inner;428 u64 tx_gather;429 u64 tx_lso;430 u64 hw_tls_tx;431 432 u64 tls_tx_fallback;433 u64 tls_tx_no_fallback;434 u64 tx_errors;435 u64 tx_busy;436 437 /* Cold data follows */438 439 u32 irq_vector;440 irq_handler_t handler;441 char name[IFNAMSIZ + 8];442 cpumask_t affinity_mask;443} ____cacheline_aligned;444 445/* Firmware version as it is written in the 32bit value in the BAR */446struct nfp_net_fw_version {447 u8 minor;448 u8 major;449 u8 class;450 451 /* This byte can be exploited for more use, currently,452 * BIT0: dp type, BIT[7:1]: reserved453 */454 u8 extend;455} __packed;456 457static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver,458 u8 extend, u8 class, u8 major, u8 minor)459{460 return fw_ver->extend == extend &&461 fw_ver->class == class &&462 fw_ver->major == major &&463 fw_ver->minor == minor;464}465 466struct nfp_stat_pair {467 u64 pkts;468 u64 bytes;469};470 471/**472 * struct nfp_net_dp - NFP network device datapath data structure473 * @dev: Backpointer to struct device474 * @netdev: Backpointer to net_device structure475 * @is_vf: Is the driver attached to a VF?476 * @chained_metadata_format: Firemware will use new metadata format477 * @ktls_tx: Is kTLS TX enabled?478 * @rx_dma_dir: Mapping direction for RX buffers479 * @rx_dma_off: Offset at which DMA packets (for XDP headroom)480 * @rx_offset: Offset in the RX buffers where packet data starts481 * @ctrl: Local copy of the control register/word.482 * @ctrl_w1: Local copy of the control register/word1.483 * @fl_bufsz: Currently configured size of the freelist buffers484 * @xdp_prog: Installed XDP program485 * @tx_rings: Array of pre-allocated TX ring structures486 * @rx_rings: Array of pre-allocated RX ring structures487 * @ctrl_bar: Pointer to mapped control BAR488 *489 * @ops: Callbacks and parameters for this vNIC's NFD version490 * @txrwb: TX pointer write back area (indexed by queue id)491 * @txrwb_dma: TX pointer write back area DMA address492 * @txd_cnt: Size of the TX ring in number of min size packets493 * @rxd_cnt: Size of the RX ring in number of min size packets494 * @num_r_vecs: Number of used ring vectors495 * @num_tx_rings: Currently configured number of TX rings496 * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP)497 * @num_rx_rings: Currently configured number of RX rings498 * @mtu: Device MTU499 * @xsk_pools: XSK buffer pools, @max_r_vecs in size (for AF_XDP).500 */501struct nfp_net_dp {502 struct device *dev;503 struct net_device *netdev;504 505 u8 is_vf:1;506 u8 chained_metadata_format:1;507 u8 ktls_tx:1;508 509 u8 rx_dma_dir;510 u8 rx_offset;511 512 u32 rx_dma_off;513 514 u32 ctrl;515 u32 ctrl_w1;516 u32 fl_bufsz;517 518 struct bpf_prog *xdp_prog;519 520 struct nfp_net_tx_ring *tx_rings;521 struct nfp_net_rx_ring *rx_rings;522 523 u8 __iomem *ctrl_bar;524 525 /* Cold data follows */526 527 const struct nfp_dp_ops *ops;528 529 u64 *txrwb;530 dma_addr_t txrwb_dma;531 532 unsigned int txd_cnt;533 unsigned int rxd_cnt;534 535 unsigned int num_r_vecs;536 537 unsigned int num_tx_rings;538 unsigned int num_stack_tx_rings;539 unsigned int num_rx_rings;540 541 unsigned int mtu;542 543 struct xsk_buff_pool **xsk_pools;544};545 546/**547 * struct nfp_net - NFP network device structure548 * @dp: Datapath structure549 * @dev_info: NFP ASIC params550 * @id: vNIC id within the PF (0 for VFs)551 * @fw_ver: Firmware version552 * @cap: Capabilities advertised by the Firmware553 * @cap_w1: Extended capabilities word advertised by the Firmware554 * @max_mtu: Maximum support MTU advertised by the Firmware555 * @rss_hfunc: RSS selected hash function556 * @rss_cfg: RSS configuration557 * @rss_key: RSS secret key558 * @rss_itbl: RSS indirection table559 * @xdp: Information about the driver XDP program560 * @xdp_hw: Information about the HW XDP program561 * @max_r_vecs: Number of allocated interrupt vectors for RX/TX562 * @max_tx_rings: Maximum number of TX rings supported by the Firmware563 * @max_rx_rings: Maximum number of RX rings supported by the Firmware564 * @stride_rx: Queue controller RX queue spacing565 * @stride_tx: Queue controller TX queue spacing566 * @r_vecs: Pre-allocated array of ring vectors567 * @irq_entries: Pre-allocated array of MSI-X entries568 * @lsc_handler: Handler for Link State Change interrupt569 * @lsc_name: Name for Link State Change interrupt570 * @exn_handler: Handler for Exception interrupt571 * @exn_name: Name for Exception interrupt572 * @shared_handler: Handler for shared interrupts573 * @shared_name: Name for shared interrupt574 * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active,575 * @reconfig_sync_present and HW reconfiguration request576 * regs/machinery from async requests (sync must take577 * @bar_lock)578 * @reconfig_posted: Pending reconfig bits coming from async sources579 * @reconfig_timer_active: Timer for reading reconfiguration results is pending580 * @reconfig_sync_present: Some thread is performing synchronous reconfig581 * @reconfig_timer: Timer for async reading of reconfig results582 * @reconfig_in_progress_update: Update FW is processing now (debug only)583 * @bar_lock: vNIC config BAR access lock, protects: update,584 * mailbox area, crypto TLV585 * @link_up: Is the link up?586 * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading587 * @rx_coalesce_adapt_on: Is RX interrupt moderation adaptive?588 * @tx_coalesce_adapt_on: Is TX interrupt moderation adaptive?589 * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter590 * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter591 * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter592 * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter593 * @qcp_cfg: Pointer to QCP queue used for configuration notification594 * @tx_bar: Pointer to mapped TX queues595 * @rx_bar: Pointer to mapped FL/RX queues596 * @xa_ipsec: IPsec xarray SA data597 * @tlv_caps: Parsed TLV capabilities598 * @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections599 * @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections600 * @ktls_conn_id_gen: Trivial generator for kTLS connection ids (for TX)601 * @ktls_no_space: Counter of firmware rejecting kTLS connection due to602 * lack of space603 * @ktls_rx_resync_req: Counter of TLS RX resync requested604 * @ktls_rx_resync_ign: Counter of TLS RX resync requests ignored605 * @ktls_rx_resync_sent: Counter of TLS RX resync completed606 * @mbox_cmsg: Common Control Message via vNIC mailbox state607 * @mbox_cmsg.queue: CCM mbox queue of pending messages608 * @mbox_cmsg.wq: CCM mbox wait queue of waiting processes609 * @mbox_cmsg.workq: CCM mbox work queue for @wait_work and @runq_work610 * @mbox_cmsg.wait_work: CCM mbox posted msg reconfig wait work611 * @mbox_cmsg.runq_work: CCM mbox posted msg queue runner work612 * @mbox_cmsg.tag: CCM mbox message tag allocator613 * @debugfs_dir: Device directory in debugfs614 * @vnic_list: Entry on device vNIC list615 * @pdev: Backpointer to PCI device616 * @app: APP handle if available617 * @vnic_no_name: For non-port PF vNIC make ndo_get_phys_port_name return618 * -EOPNOTSUPP to keep backwards compatibility (set by app)619 * @port: Pointer to nfp_port structure if vNIC is a port620 * @mbox_amsg: Asynchronously processed message via mailbox621 * @mbox_amsg.lock: Protect message list622 * @mbox_amsg.list: List of message to process623 * @mbox_amsg.work: Work to process message asynchronously624 * @fs: Flow steering625 * @fs.count: Flow count626 * @fs.list: List of flows627 * @app_priv: APP private data for this vNIC628 */629struct nfp_net {630 struct nfp_net_dp dp;631 632 const struct nfp_dev_info *dev_info;633 struct nfp_net_fw_version fw_ver;634 635 u32 id;636 637 u32 cap;638 u32 cap_w1;639 u32 max_mtu;640 641 u8 rss_hfunc;642 u32 rss_cfg;643 u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ];644 u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ];645 646 struct xdp_attachment_info xdp;647 struct xdp_attachment_info xdp_hw;648 649 unsigned int max_tx_rings;650 unsigned int max_rx_rings;651 652 int stride_tx;653 int stride_rx;654 655 unsigned int max_r_vecs;656 struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS];657 struct msix_entry irq_entries[NFP_NET_MAX_IRQS];658 659 irq_handler_t lsc_handler;660 char lsc_name[IFNAMSIZ + 8];661 662 irq_handler_t exn_handler;663 char exn_name[IFNAMSIZ + 8];664 665 irq_handler_t shared_handler;666 char shared_name[IFNAMSIZ + 8];667 668 bool link_up;669 spinlock_t link_status_lock;670 671 spinlock_t reconfig_lock;672 u32 reconfig_posted;673 bool reconfig_timer_active;674 bool reconfig_sync_present;675 struct timer_list reconfig_timer;676 u32 reconfig_in_progress_update;677 678 struct semaphore bar_lock;679 680 bool rx_coalesce_adapt_on;681 bool tx_coalesce_adapt_on;682 u32 rx_coalesce_usecs;683 u32 rx_coalesce_max_frames;684 u32 tx_coalesce_usecs;685 u32 tx_coalesce_max_frames;686 687 u8 __iomem *qcp_cfg;688 689 u8 __iomem *tx_bar;690 u8 __iomem *rx_bar;691 692#ifdef CONFIG_NFP_NET_IPSEC693 struct xarray xa_ipsec;694#endif695 696 struct nfp_net_tlv_caps tlv_caps;697 698 unsigned int ktls_tx_conn_cnt;699 unsigned int ktls_rx_conn_cnt;700 701 atomic64_t ktls_conn_id_gen;702 703 atomic_t ktls_no_space;704 atomic_t ktls_rx_resync_req;705 atomic_t ktls_rx_resync_ign;706 atomic_t ktls_rx_resync_sent;707 708 struct {709 struct sk_buff_head queue;710 wait_queue_head_t wq;711 struct workqueue_struct *workq;712 struct work_struct wait_work;713 struct work_struct runq_work;714 u16 tag;715 } mbox_cmsg;716 717 struct dentry *debugfs_dir;718 719 struct list_head vnic_list;720 721 struct pci_dev *pdev;722 struct nfp_app *app;723 724 bool vnic_no_name;725 726 struct nfp_port *port;727 728 struct {729 spinlock_t lock;730 struct list_head list;731 struct work_struct work;732 } mbox_amsg;733 734 struct {735 u16 count;736 struct list_head list;737 } fs;738 739 void *app_priv;740};741 742struct nfp_fs_entry {743 struct list_head node;744 u32 flow_type;745 u32 loc;746 struct {747 union {748 struct {749 __be32 sip4;750 __be32 dip4;751 };752 struct {753 __be32 sip6[4];754 __be32 dip6[4];755 };756 };757 union {758 __be16 l3_proto;759 u8 l4_proto;760 };761 __be16 sport;762 __be16 dport;763 } key, msk;764 u64 action;765};766 767struct nfp_mbox_amsg_entry {768 struct list_head list;769 int (*cfg)(struct nfp_net *nn, struct nfp_mbox_amsg_entry *entry);770 u32 cmd;771 char msg[];772};773 774int nfp_net_sched_mbox_amsg_work(struct nfp_net *nn, u32 cmd, const void *data, size_t len,775 int (*cb)(struct nfp_net *, struct nfp_mbox_amsg_entry *));776 777/* Functions to read/write from/to a BAR778 * Performs any endian conversion necessary.779 */780static inline u16 nn_readb(struct nfp_net *nn, int off)781{782 return readb(nn->dp.ctrl_bar + off);783}784 785static inline void nn_writeb(struct nfp_net *nn, int off, u8 val)786{787 writeb(val, nn->dp.ctrl_bar + off);788}789 790static inline u16 nn_readw(struct nfp_net *nn, int off)791{792 return readw(nn->dp.ctrl_bar + off);793}794 795static inline void nn_writew(struct nfp_net *nn, int off, u16 val)796{797 writew(val, nn->dp.ctrl_bar + off);798}799 800static inline u32 nn_readl(struct nfp_net *nn, int off)801{802 return readl(nn->dp.ctrl_bar + off);803}804 805static inline void nn_writel(struct nfp_net *nn, int off, u32 val)806{807 writel(val, nn->dp.ctrl_bar + off);808}809 810static inline u64 nn_readq(struct nfp_net *nn, int off)811{812 return readq(nn->dp.ctrl_bar + off);813}814 815static inline void nn_writeq(struct nfp_net *nn, int off, u64 val)816{817 writeq(val, nn->dp.ctrl_bar + off);818}819 820/* Flush posted PCI writes by reading something without side effects */821static inline void nn_pci_flush(struct nfp_net *nn)822{823 nn_readl(nn, NFP_NET_CFG_VERSION);824}825 826/* Queue Controller Peripheral access functions and definitions.827 *828 * Some of the BARs of the NFP are mapped to portions of the Queue829 * Controller Peripheral (QCP) address space on the NFP. A QCP queue830 * has a read and a write pointer (as well as a size and flags,831 * indicating overflow etc). The QCP offers a number of different832 * operation on queue pointers, but here we only offer function to833 * either add to a pointer or to read the pointer value.834 */835#define NFP_QCP_QUEUE_ADDR_SZ 0x800836#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ)837#define NFP_QCP_QUEUE_ADD_RPTR 0x0000838#define NFP_QCP_QUEUE_ADD_WPTR 0x0004839#define NFP_QCP_QUEUE_STS_LO 0x0008840#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff841#define NFP_QCP_QUEUE_STS_HI 0x000c842#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff843 844/* nfp_qcp_ptr - Read or Write Pointer of a queue */845enum nfp_qcp_ptr {846 NFP_QCP_READ_PTR = 0,847 NFP_QCP_WRITE_PTR848};849 850/**851 * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue852 *853 * @q: Base address for queue structure854 * @val: Value to add to the queue pointer855 */856static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val)857{858 writel(val, q + NFP_QCP_QUEUE_ADD_RPTR);859}860 861/**862 * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue863 *864 * @q: Base address for queue structure865 * @val: Value to add to the queue pointer866 */867static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val)868{869 writel(val, q + NFP_QCP_QUEUE_ADD_WPTR);870}871 872static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr)873{874 u32 off;875 u32 val;876 877 if (ptr == NFP_QCP_READ_PTR)878 off = NFP_QCP_QUEUE_STS_LO;879 else880 off = NFP_QCP_QUEUE_STS_HI;881 882 val = readl(q + off);883 884 if (ptr == NFP_QCP_READ_PTR)885 return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask;886 else887 return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask;888}889 890/**891 * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue892 * @q: Base address for queue structure893 *894 * Return: Value read.895 */896static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q)897{898 return _nfp_qcp_read(q, NFP_QCP_READ_PTR);899}900 901/**902 * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue903 * @q: Base address for queue structure904 *905 * Return: Value read.906 */907static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q)908{909 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR);910}911 912u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue);913 914static inline bool nfp_net_is_data_vnic(struct nfp_net *nn)915{916 WARN_ON_ONCE(!nn->dp.netdev && nn->port);917 return !!nn->dp.netdev;918}919 920static inline bool nfp_net_running(struct nfp_net *nn)921{922 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE;923}924 925static inline const char *nfp_net_name(struct nfp_net *nn)926{927 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl";928}929 930static inline void nfp_ctrl_lock(struct nfp_net *nn)931 __acquires(&nn->r_vecs[0].lock)932{933 spin_lock_bh(&nn->r_vecs[0].lock);934}935 936static inline void nfp_ctrl_unlock(struct nfp_net *nn)937 __releases(&nn->r_vecs[0].lock)938{939 spin_unlock_bh(&nn->r_vecs[0].lock);940}941 942static inline void nn_ctrl_bar_lock(struct nfp_net *nn)943{944 down(&nn->bar_lock);945}946 947static inline bool nn_ctrl_bar_trylock(struct nfp_net *nn)948{949 return !down_trylock(&nn->bar_lock);950}951 952static inline void nn_ctrl_bar_unlock(struct nfp_net *nn)953{954 up(&nn->bar_lock);955}956 957/* Globals */958extern const char nfp_driver_version[];959 960extern const struct net_device_ops nfp_nfd3_netdev_ops;961extern const struct net_device_ops nfp_nfdk_netdev_ops;962 963static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev)964{965 return netdev->netdev_ops == &nfp_nfd3_netdev_ops ||966 netdev->netdev_ops == &nfp_nfdk_netdev_ops;967}968 969static inline int nfp_net_coalesce_para_check(u32 param)970{971 if (param >= ((1 << 16) - 1))972 return -EINVAL;973 974 return 0;975}976 977/* Prototypes */978void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,979 void __iomem *ctrl_bar);980 981struct nfp_net *982nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info,983 void __iomem *ctrl_bar, bool needs_netdev,984 unsigned int max_tx_rings, unsigned int max_rx_rings);985void nfp_net_free(struct nfp_net *nn);986 987int nfp_net_init(struct nfp_net *nn);988void nfp_net_clean(struct nfp_net *nn);989 990int nfp_ctrl_open(struct nfp_net *nn);991void nfp_ctrl_close(struct nfp_net *nn);992 993void nfp_net_set_ethtool_ops(struct net_device *netdev);994void nfp_net_info(struct nfp_net *nn);995int __nfp_net_reconfig(struct nfp_net *nn, u32 update);996int nfp_net_reconfig(struct nfp_net *nn, u32 update);997unsigned int nfp_net_rss_key_sz(struct nfp_net *nn);998void nfp_net_rss_write_itbl(struct nfp_net *nn);999void nfp_net_rss_write_key(struct nfp_net *nn);1000void nfp_net_coalesce_write_cfg(struct nfp_net *nn);1001int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size);1002int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd);1003int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd);1004void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 update);1005int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn);1006 1007unsigned int1008nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,1009 unsigned int min_irqs, unsigned int want_irqs);1010void nfp_net_irqs_disable(struct pci_dev *pdev);1011void1012nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,1013 unsigned int n);1014struct sk_buff *1015nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,1016 struct sk_buff *skb, u64 *tls_handle, int *nr_frags);1017void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle);1018 1019struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn);1020int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new,1021 struct netlink_ext_ack *extack);1022 1023int nfp_net_fs_add_hw(struct nfp_net *nn, struct nfp_fs_entry *entry);1024int nfp_net_fs_del_hw(struct nfp_net *nn, struct nfp_fs_entry *entry);1025 1026#ifdef CONFIG_NFP_DEBUG1027void nfp_net_debugfs_create(void);1028void nfp_net_debugfs_destroy(void);1029struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev);1030void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir);1031void nfp_net_debugfs_dir_clean(struct dentry **dir);1032#else1033static inline void nfp_net_debugfs_create(void)1034{1035}1036 1037static inline void nfp_net_debugfs_destroy(void)1038{1039}1040 1041static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)1042{1043 return NULL;1044}1045 1046static inline void1047nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir)1048{1049}1050 1051static inline void nfp_net_debugfs_dir_clean(struct dentry **dir)1052{1053}1054#endif /* CONFIG_NFP_DEBUG */1055 1056#endif /* _NFP_NET_H_ */1057