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.h 6 * 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 5 57 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 0 63 #define NFP_NET_Q0_BAR 2 64 #define NFP_NET_Q1_BAR 4 /* OBSOLETE */ 65 66 /* Default size for MTU and freelist buffer sizes */ 67 #define NFP_NET_DEFAULT_MTU 1500U 68 69 /* Maximum number of bytes prepended to a packet */ 70 #define NFP_NET_MAX_PREPEND 64 71 72 /* Interrupt definitions */ 73 #define NFP_NET_NON_Q_VECTORS 2 74 #define NFP_NET_IRQ_LSC_IDX 0 75 #define NFP_NET_IRQ_EXN_IDX 1 76 #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 /* Offload definitions */ 92 #define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) 93 94 #define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN) 95 #define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \ 96 SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) 97 98 /* Forward declarations */ 99 struct nfp_cpp; 100 struct nfp_dev_info; 101 struct nfp_dp_ops; 102 struct nfp_eth_table_port; 103 struct nfp_net; 104 struct nfp_net_r_vector; 105 struct nfp_port; 106 struct xsk_buff_pool; 107 108 struct nfp_nfd3_tx_desc; 109 struct nfp_nfd3_tx_buf; 110 111 /* Convenience macro for wrapping descriptor index on ring size */ 112 #define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1)) 113 114 /* Convenience macro for writing dma address into RX/TX descriptors */ 115 #define nfp_desc_set_dma_addr(desc, dma_addr) \ 116 do { \ 117 __typeof(desc) __d = (desc); \ 118 dma_addr_t __addr = (dma_addr); \ 119 \ 120 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ 121 __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ 122 } while (0) 123 124 /** 125 * struct nfp_net_tx_ring - TX ring structure 126 * @r_vec: Back pointer to ring vector structure 127 * @idx: Ring index from Linux's perspective 128 * @qcp_q: Pointer to base of the QCP TX queue 129 * @txrwb: TX pointer write back area 130 * @cnt: Size of the queue in number of descriptors 131 * @wr_p: TX ring write pointer (free running) 132 * @rd_p: TX ring read pointer (free running) 133 * @qcp_rd_p: Local copy of QCP TX queue read pointer 134 * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer 135 * (used for .xmit_more delayed kick) 136 * @txbufs: Array of transmitted TX buffers, to free on transmit 137 * @txds: Virtual address of TX ring in host memory 138 * 139 * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue 140 * @dma: DMA address of the TX ring 141 * @size: Size, in bytes, of the TX ring (needed to free) 142 * @is_xdp: Is this a XDP TX ring? 143 */ 144 struct nfp_net_tx_ring { 145 struct nfp_net_r_vector *r_vec; 146 147 u32 idx; 148 u8 __iomem *qcp_q; 149 u64 *txrwb; 150 151 u32 cnt; 152 u32 wr_p; 153 u32 rd_p; 154 u32 qcp_rd_p; 155 156 u32 wr_ptr_add; 157 158 struct nfp_nfd3_tx_buf *txbufs; 159 struct nfp_nfd3_tx_desc *txds; 160 161 /* Cold data follows */ 162 int qcidx; 163 164 dma_addr_t dma; 165 size_t size; 166 bool is_xdp; 167 } ____cacheline_aligned; 168 169 /* RX and freelist descriptor format */ 170 171 #define PCIE_DESC_RX_DD BIT(7) 172 #define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) 173 174 /* Flags in the RX descriptor */ 175 #define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) 176 #define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) 177 #define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) 178 #define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) 179 #define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) 180 #define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) 181 #define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) 182 #define PCIE_DESC_RX_DECRYPTED cpu_to_le16(BIT(8)) 183 #define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) 184 #define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) 185 #define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) 186 #define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) 187 #define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) 188 #define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) 189 #define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) 190 #define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) 191 192 #define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ 193 PCIE_DESC_RX_TCP_CSUM | \ 194 PCIE_DESC_RX_UDP_CSUM | \ 195 PCIE_DESC_RX_I_IP4_CSUM | \ 196 PCIE_DESC_RX_I_TCP_CSUM | \ 197 PCIE_DESC_RX_I_UDP_CSUM) 198 #define PCIE_DESC_RX_CSUM_OK_SHIFT 1 199 #define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) 200 #define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ 201 PCIE_DESC_RX_CSUM_OK_SHIFT) 202 203 struct nfp_net_rx_desc { 204 union { 205 struct { 206 u8 dma_addr_hi; /* High bits of the buf address */ 207 __le16 reserved; /* Must be zero */ 208 u8 meta_len_dd; /* Must be zero */ 209 210 __le32 dma_addr_lo; /* Low bits of the buffer address */ 211 } __packed fld; 212 213 struct { 214 __le16 data_len; /* Length of the frame + meta data */ 215 u8 reserved; 216 u8 meta_len_dd; /* Length of meta data prepended + 217 * descriptor done flag. 218 */ 219 220 __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ 221 __le16 vlan; /* VLAN if stripped */ 222 } __packed rxd; 223 224 __le32 vals[2]; 225 }; 226 }; 227 228 #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0) 229 230 struct nfp_meta_parsed { 231 u8 hash_type; 232 u8 csum_type; 233 u32 hash; 234 u32 mark; 235 u32 portid; 236 __wsum csum; 237 }; 238 239 struct nfp_net_rx_hash { 240 __be32 hash_type; 241 __be32 hash; 242 }; 243 244 /** 245 * struct nfp_net_rx_buf - software RX buffer descriptor 246 * @frag: page fragment buffer 247 * @dma_addr: DMA mapping address of the buffer 248 */ 249 struct nfp_net_rx_buf { 250 void *frag; 251 dma_addr_t dma_addr; 252 }; 253 254 /** 255 * struct nfp_net_xsk_rx_buf - software RX XSK buffer descriptor 256 * @dma_addr: DMA mapping address of the buffer 257 * @xdp: XSK buffer pool handle (for AF_XDP) 258 */ 259 struct nfp_net_xsk_rx_buf { 260 dma_addr_t dma_addr; 261 struct xdp_buff *xdp; 262 }; 263 264 /** 265 * struct nfp_net_rx_ring - RX ring structure 266 * @r_vec: Back pointer to ring vector structure 267 * @cnt: Size of the queue in number of descriptors 268 * @wr_p: FL/RX ring write pointer (free running) 269 * @rd_p: FL/RX ring read pointer (free running) 270 * @idx: Ring index from Linux's perspective 271 * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist 272 * @qcp_fl: Pointer to base of the QCP freelist queue 273 * @rxbufs: Array of transmitted FL/RX buffers 274 * @xsk_rxbufs: Array of transmitted FL/RX buffers (for AF_XDP) 275 * @rxds: Virtual address of FL/RX ring in host memory 276 * @xdp_rxq: RX-ring info avail for XDP 277 * @dma: DMA address of the FL/RX ring 278 * @size: Size, in bytes, of the FL/RX ring (needed to free) 279 */ 280 struct nfp_net_rx_ring { 281 struct nfp_net_r_vector *r_vec; 282 283 u32 cnt; 284 u32 wr_p; 285 u32 rd_p; 286 287 u32 idx; 288 289 int fl_qcidx; 290 u8 __iomem *qcp_fl; 291 292 struct nfp_net_rx_buf *rxbufs; 293 struct nfp_net_xsk_rx_buf *xsk_rxbufs; 294 struct nfp_net_rx_desc *rxds; 295 296 struct xdp_rxq_info xdp_rxq; 297 298 dma_addr_t dma; 299 size_t size; 300 } ____cacheline_aligned; 301 302 /** 303 * struct nfp_net_r_vector - Per ring interrupt vector configuration 304 * @nfp_net: Backpointer to nfp_net structure 305 * @napi: NAPI structure for this ring vec 306 * @tasklet: ctrl vNIC, tasklet for servicing the r_vec 307 * @queue: ctrl vNIC, send queue 308 * @lock: ctrl vNIC, r_vec lock protects @queue 309 * @tx_ring: Pointer to TX ring 310 * @rx_ring: Pointer to RX ring 311 * @xdp_ring: Pointer to an extra TX ring for XDP 312 * @xsk_pool: XSK buffer pool active on vector queue pair (for AF_XDP) 313 * @irq_entry: MSI-X table entry (use for talking to the device) 314 * @event_ctr: Number of interrupt 315 * @rx_dim: Dynamic interrupt moderation structure for RX 316 * @tx_dim: Dynamic interrupt moderation structure for TX 317 * @rx_sync: Seqlock for atomic updates of RX stats 318 * @rx_pkts: Number of received packets 319 * @rx_bytes: Number of received bytes 320 * @rx_drops: Number of packets dropped on RX due to lack of resources 321 * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK 322 * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK 323 * @hw_csum_rx_complete: Counter of packets with CHECKSUM_COMPLETE reported 324 * @hw_csum_rx_error: Counter of packets with bad checksums 325 * @hw_tls_rx: Number of packets with TLS decrypted by hardware 326 * @tx_sync: Seqlock for atomic updates of TX stats 327 * @tx_pkts: Number of Transmitted packets 328 * @tx_bytes: Number of Transmitted bytes 329 * @hw_csum_tx: Counter of packets with TX checksum offload requested 330 * @hw_csum_tx_inner: Counter of inner TX checksum offload requests 331 * @tx_gather: Counter of packets with Gather DMA 332 * @tx_lso: Counter of LSO packets sent 333 * @hw_tls_tx: Counter of TLS packets sent with crypto offloaded to HW 334 * @tls_tx_fallback: Counter of TLS packets sent which had to be encrypted 335 * by the fallback path because packets came out of order 336 * @tls_tx_no_fallback: Counter of TLS packets not sent because the fallback 337 * path could not encrypt them 338 * @tx_errors: How many TX errors were encountered 339 * @tx_busy: How often was TX busy (no space)? 340 * @rx_replace_buf_alloc_fail: Counter of RX buffer allocation failures 341 * @irq_vector: Interrupt vector number (use for talking to the OS) 342 * @handler: Interrupt handler for this ring vector 343 * @name: Name of the interrupt vector 344 * @affinity_mask: SMP affinity mask for this vector 345 * 346 * This structure ties RX and TX rings to interrupt vectors and a NAPI 347 * context. This currently only supports one RX and TX ring per 348 * interrupt vector but might be extended in the future to allow 349 * association of multiple rings per vector. 350 */ 351 struct nfp_net_r_vector { 352 struct nfp_net *nfp_net; 353 union { 354 struct napi_struct napi; 355 struct { 356 struct tasklet_struct tasklet; 357 struct sk_buff_head queue; 358 spinlock_t lock; 359 }; 360 }; 361 362 struct nfp_net_tx_ring *tx_ring; 363 struct nfp_net_rx_ring *rx_ring; 364 365 u16 irq_entry; 366 367 u16 event_ctr; 368 struct dim rx_dim; 369 struct dim tx_dim; 370 371 struct u64_stats_sync rx_sync; 372 u64 rx_pkts; 373 u64 rx_bytes; 374 u64 rx_drops; 375 u64 hw_csum_rx_ok; 376 u64 hw_csum_rx_inner_ok; 377 u64 hw_csum_rx_complete; 378 u64 hw_tls_rx; 379 380 u64 hw_csum_rx_error; 381 u64 rx_replace_buf_alloc_fail; 382 383 struct nfp_net_tx_ring *xdp_ring; 384 struct xsk_buff_pool *xsk_pool; 385 386 struct u64_stats_sync tx_sync; 387 u64 tx_pkts; 388 u64 tx_bytes; 389 390 u64 ____cacheline_aligned_in_smp hw_csum_tx; 391 u64 hw_csum_tx_inner; 392 u64 tx_gather; 393 u64 tx_lso; 394 u64 hw_tls_tx; 395 396 u64 tls_tx_fallback; 397 u64 tls_tx_no_fallback; 398 u64 tx_errors; 399 u64 tx_busy; 400 401 /* Cold data follows */ 402 403 u32 irq_vector; 404 irq_handler_t handler; 405 char name[IFNAMSIZ + 8]; 406 cpumask_t affinity_mask; 407 } ____cacheline_aligned; 408 409 /* Firmware version as it is written in the 32bit value in the BAR */ 410 struct nfp_net_fw_version { 411 u8 minor; 412 u8 major; 413 u8 class; 414 u8 resv; 415 } __packed; 416 417 static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, 418 u8 resv, u8 class, u8 major, u8 minor) 419 { 420 return fw_ver->resv == resv && 421 fw_ver->class == class && 422 fw_ver->major == major && 423 fw_ver->minor == minor; 424 } 425 426 struct nfp_stat_pair { 427 u64 pkts; 428 u64 bytes; 429 }; 430 431 /** 432 * struct nfp_net_dp - NFP network device datapath data structure 433 * @dev: Backpointer to struct device 434 * @netdev: Backpointer to net_device structure 435 * @is_vf: Is the driver attached to a VF? 436 * @chained_metadata_format: Firemware will use new metadata format 437 * @ktls_tx: Is kTLS TX enabled? 438 * @rx_dma_dir: Mapping direction for RX buffers 439 * @rx_dma_off: Offset at which DMA packets (for XDP headroom) 440 * @rx_offset: Offset in the RX buffers where packet data starts 441 * @ctrl: Local copy of the control register/word. 442 * @fl_bufsz: Currently configured size of the freelist buffers 443 * @xdp_prog: Installed XDP program 444 * @tx_rings: Array of pre-allocated TX ring structures 445 * @rx_rings: Array of pre-allocated RX ring structures 446 * @ctrl_bar: Pointer to mapped control BAR 447 * 448 * @ops: Callbacks and parameters for this vNIC's NFD version 449 * @txrwb: TX pointer write back area (indexed by queue id) 450 * @txrwb_dma: TX pointer write back area DMA address 451 * @txd_cnt: Size of the TX ring in number of min size packets 452 * @rxd_cnt: Size of the RX ring in number of min size packets 453 * @num_r_vecs: Number of used ring vectors 454 * @num_tx_rings: Currently configured number of TX rings 455 * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) 456 * @num_rx_rings: Currently configured number of RX rings 457 * @mtu: Device MTU 458 * @xsk_pools: XSK buffer pools, @max_r_vecs in size (for AF_XDP). 459 */ 460 struct nfp_net_dp { 461 struct device *dev; 462 struct net_device *netdev; 463 464 u8 is_vf:1; 465 u8 chained_metadata_format:1; 466 u8 ktls_tx:1; 467 468 u8 rx_dma_dir; 469 u8 rx_offset; 470 471 u32 rx_dma_off; 472 473 u32 ctrl; 474 u32 fl_bufsz; 475 476 struct bpf_prog *xdp_prog; 477 478 struct nfp_net_tx_ring *tx_rings; 479 struct nfp_net_rx_ring *rx_rings; 480 481 u8 __iomem *ctrl_bar; 482 483 /* Cold data follows */ 484 485 const struct nfp_dp_ops *ops; 486 487 u64 *txrwb; 488 dma_addr_t txrwb_dma; 489 490 unsigned int txd_cnt; 491 unsigned int rxd_cnt; 492 493 unsigned int num_r_vecs; 494 495 unsigned int num_tx_rings; 496 unsigned int num_stack_tx_rings; 497 unsigned int num_rx_rings; 498 499 unsigned int mtu; 500 501 struct xsk_buff_pool **xsk_pools; 502 }; 503 504 /** 505 * struct nfp_net - NFP network device structure 506 * @dp: Datapath structure 507 * @dev_info: NFP ASIC params 508 * @id: vNIC id within the PF (0 for VFs) 509 * @fw_ver: Firmware version 510 * @cap: Capabilities advertised by the Firmware 511 * @max_mtu: Maximum support MTU advertised by the Firmware 512 * @rss_hfunc: RSS selected hash function 513 * @rss_cfg: RSS configuration 514 * @rss_key: RSS secret key 515 * @rss_itbl: RSS indirection table 516 * @xdp: Information about the driver XDP program 517 * @xdp_hw: Information about the HW XDP program 518 * @max_r_vecs: Number of allocated interrupt vectors for RX/TX 519 * @max_tx_rings: Maximum number of TX rings supported by the Firmware 520 * @max_rx_rings: Maximum number of RX rings supported by the Firmware 521 * @stride_rx: Queue controller RX queue spacing 522 * @stride_tx: Queue controller TX queue spacing 523 * @r_vecs: Pre-allocated array of ring vectors 524 * @irq_entries: Pre-allocated array of MSI-X entries 525 * @lsc_handler: Handler for Link State Change interrupt 526 * @lsc_name: Name for Link State Change interrupt 527 * @exn_handler: Handler for Exception interrupt 528 * @exn_name: Name for Exception interrupt 529 * @shared_handler: Handler for shared interrupts 530 * @shared_name: Name for shared interrupt 531 * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active, 532 * @reconfig_sync_present and HW reconfiguration request 533 * regs/machinery from async requests (sync must take 534 * @bar_lock) 535 * @reconfig_posted: Pending reconfig bits coming from async sources 536 * @reconfig_timer_active: Timer for reading reconfiguration results is pending 537 * @reconfig_sync_present: Some thread is performing synchronous reconfig 538 * @reconfig_timer: Timer for async reading of reconfig results 539 * @reconfig_in_progress_update: Update FW is processing now (debug only) 540 * @bar_lock: vNIC config BAR access lock, protects: update, 541 * mailbox area, crypto TLV 542 * @link_up: Is the link up? 543 * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading 544 * @rx_coalesce_adapt_on: Is RX interrupt moderation adaptive? 545 * @tx_coalesce_adapt_on: Is TX interrupt moderation adaptive? 546 * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter 547 * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter 548 * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter 549 * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter 550 * @qcp_cfg: Pointer to QCP queue used for configuration notification 551 * @tx_bar: Pointer to mapped TX queues 552 * @rx_bar: Pointer to mapped FL/RX queues 553 * @tlv_caps: Parsed TLV capabilities 554 * @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections 555 * @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections 556 * @ktls_conn_id_gen: Trivial generator for kTLS connection ids (for TX) 557 * @ktls_no_space: Counter of firmware rejecting kTLS connection due to 558 * lack of space 559 * @ktls_rx_resync_req: Counter of TLS RX resync requested 560 * @ktls_rx_resync_ign: Counter of TLS RX resync requests ignored 561 * @ktls_rx_resync_sent: Counter of TLS RX resync completed 562 * @mbox_cmsg: Common Control Message via vNIC mailbox state 563 * @mbox_cmsg.queue: CCM mbox queue of pending messages 564 * @mbox_cmsg.wq: CCM mbox wait queue of waiting processes 565 * @mbox_cmsg.workq: CCM mbox work queue for @wait_work and @runq_work 566 * @mbox_cmsg.wait_work: CCM mbox posted msg reconfig wait work 567 * @mbox_cmsg.runq_work: CCM mbox posted msg queue runner work 568 * @mbox_cmsg.tag: CCM mbox message tag allocator 569 * @debugfs_dir: Device directory in debugfs 570 * @vnic_list: Entry on device vNIC list 571 * @pdev: Backpointer to PCI device 572 * @app: APP handle if available 573 * @vnic_no_name: For non-port PF vNIC make ndo_get_phys_port_name return 574 * -EOPNOTSUPP to keep backwards compatibility (set by app) 575 * @port: Pointer to nfp_port structure if vNIC is a port 576 * @app_priv: APP private data for this vNIC 577 */ 578 struct nfp_net { 579 struct nfp_net_dp dp; 580 581 const struct nfp_dev_info *dev_info; 582 struct nfp_net_fw_version fw_ver; 583 584 u32 id; 585 586 u32 cap; 587 u32 max_mtu; 588 589 u8 rss_hfunc; 590 u32 rss_cfg; 591 u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; 592 u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; 593 594 struct xdp_attachment_info xdp; 595 struct xdp_attachment_info xdp_hw; 596 597 unsigned int max_tx_rings; 598 unsigned int max_rx_rings; 599 600 int stride_tx; 601 int stride_rx; 602 603 unsigned int max_r_vecs; 604 struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS]; 605 struct msix_entry irq_entries[NFP_NET_MAX_IRQS]; 606 607 irq_handler_t lsc_handler; 608 char lsc_name[IFNAMSIZ + 8]; 609 610 irq_handler_t exn_handler; 611 char exn_name[IFNAMSIZ + 8]; 612 613 irq_handler_t shared_handler; 614 char shared_name[IFNAMSIZ + 8]; 615 616 bool link_up; 617 spinlock_t link_status_lock; 618 619 spinlock_t reconfig_lock; 620 u32 reconfig_posted; 621 bool reconfig_timer_active; 622 bool reconfig_sync_present; 623 struct timer_list reconfig_timer; 624 u32 reconfig_in_progress_update; 625 626 struct semaphore bar_lock; 627 628 bool rx_coalesce_adapt_on; 629 bool tx_coalesce_adapt_on; 630 u32 rx_coalesce_usecs; 631 u32 rx_coalesce_max_frames; 632 u32 tx_coalesce_usecs; 633 u32 tx_coalesce_max_frames; 634 635 u8 __iomem *qcp_cfg; 636 637 u8 __iomem *tx_bar; 638 u8 __iomem *rx_bar; 639 640 struct nfp_net_tlv_caps tlv_caps; 641 642 unsigned int ktls_tx_conn_cnt; 643 unsigned int ktls_rx_conn_cnt; 644 645 atomic64_t ktls_conn_id_gen; 646 647 atomic_t ktls_no_space; 648 atomic_t ktls_rx_resync_req; 649 atomic_t ktls_rx_resync_ign; 650 atomic_t ktls_rx_resync_sent; 651 652 struct { 653 struct sk_buff_head queue; 654 wait_queue_head_t wq; 655 struct workqueue_struct *workq; 656 struct work_struct wait_work; 657 struct work_struct runq_work; 658 u16 tag; 659 } mbox_cmsg; 660 661 struct dentry *debugfs_dir; 662 663 struct list_head vnic_list; 664 665 struct pci_dev *pdev; 666 struct nfp_app *app; 667 668 bool vnic_no_name; 669 670 struct nfp_port *port; 671 672 void *app_priv; 673 }; 674 675 /* Functions to read/write from/to a BAR 676 * Performs any endian conversion necessary. 677 */ 678 static inline u16 nn_readb(struct nfp_net *nn, int off) 679 { 680 return readb(nn->dp.ctrl_bar + off); 681 } 682 683 static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) 684 { 685 writeb(val, nn->dp.ctrl_bar + off); 686 } 687 688 static inline u16 nn_readw(struct nfp_net *nn, int off) 689 { 690 return readw(nn->dp.ctrl_bar + off); 691 } 692 693 static inline void nn_writew(struct nfp_net *nn, int off, u16 val) 694 { 695 writew(val, nn->dp.ctrl_bar + off); 696 } 697 698 static inline u32 nn_readl(struct nfp_net *nn, int off) 699 { 700 return readl(nn->dp.ctrl_bar + off); 701 } 702 703 static inline void nn_writel(struct nfp_net *nn, int off, u32 val) 704 { 705 writel(val, nn->dp.ctrl_bar + off); 706 } 707 708 static inline u64 nn_readq(struct nfp_net *nn, int off) 709 { 710 return readq(nn->dp.ctrl_bar + off); 711 } 712 713 static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) 714 { 715 writeq(val, nn->dp.ctrl_bar + off); 716 } 717 718 /* Flush posted PCI writes by reading something without side effects */ 719 static inline void nn_pci_flush(struct nfp_net *nn) 720 { 721 nn_readl(nn, NFP_NET_CFG_VERSION); 722 } 723 724 /* Queue Controller Peripheral access functions and definitions. 725 * 726 * Some of the BARs of the NFP are mapped to portions of the Queue 727 * Controller Peripheral (QCP) address space on the NFP. A QCP queue 728 * has a read and a write pointer (as well as a size and flags, 729 * indicating overflow etc). The QCP offers a number of different 730 * operation on queue pointers, but here we only offer function to 731 * either add to a pointer or to read the pointer value. 732 */ 733 #define NFP_QCP_QUEUE_ADDR_SZ 0x800 734 #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) 735 #define NFP_QCP_QUEUE_ADD_RPTR 0x0000 736 #define NFP_QCP_QUEUE_ADD_WPTR 0x0004 737 #define NFP_QCP_QUEUE_STS_LO 0x0008 738 #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff 739 #define NFP_QCP_QUEUE_STS_HI 0x000c 740 #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff 741 742 /* nfp_qcp_ptr - Read or Write Pointer of a queue */ 743 enum nfp_qcp_ptr { 744 NFP_QCP_READ_PTR = 0, 745 NFP_QCP_WRITE_PTR 746 }; 747 748 /** 749 * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue 750 * 751 * @q: Base address for queue structure 752 * @val: Value to add to the queue pointer 753 */ 754 static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) 755 { 756 writel(val, q + NFP_QCP_QUEUE_ADD_RPTR); 757 } 758 759 /** 760 * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue 761 * 762 * @q: Base address for queue structure 763 * @val: Value to add to the queue pointer 764 */ 765 static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) 766 { 767 writel(val, q + NFP_QCP_QUEUE_ADD_WPTR); 768 } 769 770 static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) 771 { 772 u32 off; 773 u32 val; 774 775 if (ptr == NFP_QCP_READ_PTR) 776 off = NFP_QCP_QUEUE_STS_LO; 777 else 778 off = NFP_QCP_QUEUE_STS_HI; 779 780 val = readl(q + off); 781 782 if (ptr == NFP_QCP_READ_PTR) 783 return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; 784 else 785 return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; 786 } 787 788 /** 789 * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue 790 * @q: Base address for queue structure 791 * 792 * Return: Value read. 793 */ 794 static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) 795 { 796 return _nfp_qcp_read(q, NFP_QCP_READ_PTR); 797 } 798 799 /** 800 * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue 801 * @q: Base address for queue structure 802 * 803 * Return: Value read. 804 */ 805 static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) 806 { 807 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); 808 } 809 810 u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue); 811 812 static inline bool nfp_net_is_data_vnic(struct nfp_net *nn) 813 { 814 WARN_ON_ONCE(!nn->dp.netdev && nn->port); 815 return !!nn->dp.netdev; 816 } 817 818 static inline bool nfp_net_running(struct nfp_net *nn) 819 { 820 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE; 821 } 822 823 static inline const char *nfp_net_name(struct nfp_net *nn) 824 { 825 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl"; 826 } 827 828 static inline void nfp_ctrl_lock(struct nfp_net *nn) 829 __acquires(&nn->r_vecs[0].lock) 830 { 831 spin_lock_bh(&nn->r_vecs[0].lock); 832 } 833 834 static inline void nfp_ctrl_unlock(struct nfp_net *nn) 835 __releases(&nn->r_vecs[0].lock) 836 { 837 spin_unlock_bh(&nn->r_vecs[0].lock); 838 } 839 840 static inline void nn_ctrl_bar_lock(struct nfp_net *nn) 841 { 842 down(&nn->bar_lock); 843 } 844 845 static inline bool nn_ctrl_bar_trylock(struct nfp_net *nn) 846 { 847 return !down_trylock(&nn->bar_lock); 848 } 849 850 static inline void nn_ctrl_bar_unlock(struct nfp_net *nn) 851 { 852 up(&nn->bar_lock); 853 } 854 855 /* Globals */ 856 extern const char nfp_driver_version[]; 857 858 extern const struct net_device_ops nfp_net_netdev_ops; 859 860 static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev) 861 { 862 return netdev->netdev_ops == &nfp_net_netdev_ops; 863 } 864 865 static inline int nfp_net_coalesce_para_check(u32 usecs, u32 pkts) 866 { 867 if ((usecs >= ((1 << 16) - 1)) || (pkts >= ((1 << 16) - 1))) 868 return -EINVAL; 869 870 return 0; 871 } 872 873 /* Prototypes */ 874 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, 875 void __iomem *ctrl_bar); 876 877 struct nfp_net * 878 nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info, 879 void __iomem *ctrl_bar, bool needs_netdev, 880 unsigned int max_tx_rings, unsigned int max_rx_rings); 881 void nfp_net_free(struct nfp_net *nn); 882 883 int nfp_net_init(struct nfp_net *nn); 884 void nfp_net_clean(struct nfp_net *nn); 885 886 int nfp_ctrl_open(struct nfp_net *nn); 887 void nfp_ctrl_close(struct nfp_net *nn); 888 889 void nfp_net_set_ethtool_ops(struct net_device *netdev); 890 void nfp_net_info(struct nfp_net *nn); 891 int __nfp_net_reconfig(struct nfp_net *nn, u32 update); 892 int nfp_net_reconfig(struct nfp_net *nn, u32 update); 893 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn); 894 void nfp_net_rss_write_itbl(struct nfp_net *nn); 895 void nfp_net_rss_write_key(struct nfp_net *nn); 896 void nfp_net_coalesce_write_cfg(struct nfp_net *nn); 897 int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size); 898 int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd); 899 int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd); 900 void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 update); 901 int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn); 902 903 unsigned int 904 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, 905 unsigned int min_irqs, unsigned int want_irqs); 906 void nfp_net_irqs_disable(struct pci_dev *pdev); 907 void 908 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, 909 unsigned int n); 910 struct sk_buff * 911 nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, 912 struct sk_buff *skb, u64 *tls_handle, int *nr_frags); 913 void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle); 914 915 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn); 916 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new, 917 struct netlink_ext_ack *extack); 918 919 #ifdef CONFIG_NFP_DEBUG 920 void nfp_net_debugfs_create(void); 921 void nfp_net_debugfs_destroy(void); 922 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev); 923 void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir); 924 void nfp_net_debugfs_dir_clean(struct dentry **dir); 925 #else 926 static inline void nfp_net_debugfs_create(void) 927 { 928 } 929 930 static inline void nfp_net_debugfs_destroy(void) 931 { 932 } 933 934 static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) 935 { 936 return NULL; 937 } 938 939 static inline void 940 nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir) 941 { 942 } 943 944 static inline void nfp_net_debugfs_dir_clean(struct dentry **dir) 945 { 946 } 947 #endif /* CONFIG_NFP_DEBUG */ 948 949 #endif /* _NFP_NET_H_ */ 950