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 /* 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 */ 102 struct nfp_cpp; 103 struct nfp_dev_info; 104 struct nfp_dp_ops; 105 struct nfp_eth_table_port; 106 struct nfp_net; 107 struct nfp_net_r_vector; 108 struct nfp_port; 109 struct xsk_buff_pool; 110 111 struct nfp_nfd3_tx_desc; 112 struct nfp_nfd3_tx_buf; 113 114 struct nfp_nfdk_tx_desc; 115 struct 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 structure 141 * @r_vec: Back pointer to ring vector structure 142 * @idx: Ring index from Linux's perspective 143 * @data_pending: number of bytes added to current block (NFDK only) 144 * @qcp_q: Pointer to base of the QCP TX queue 145 * @txrwb: TX pointer write back area 146 * @cnt: Size of the queue in number of descriptors 147 * @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 pointer 150 * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer 151 * (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 queue 158 * @dma: DMA address of the TX ring 159 * @size: Size, in bytes, of the TX ring (needed to free) 160 * @is_xdp: Is this a XDP TX ring? 161 */ 162 struct 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 1 224 #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) 227 228 struct 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 0 255 #define NFP_NET_VLAN_STAG 1 256 257 struct 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_IPSEC 271 u32 ipsec_saidx; 272 #endif 273 }; 274 275 struct nfp_net_rx_hash { 276 __be32 hash_type; 277 __be32 hash; 278 }; 279 280 /** 281 * struct nfp_net_rx_buf - software RX buffer descriptor 282 * @frag: page fragment buffer 283 * @dma_addr: DMA mapping address of the buffer 284 */ 285 struct 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 descriptor 292 * @dma_addr: DMA mapping address of the buffer 293 * @xdp: XSK buffer pool handle (for AF_XDP) 294 */ 295 struct 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 structure 302 * @r_vec: Back pointer to ring vector structure 303 * @cnt: Size of the queue in number of descriptors 304 * @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 perspective 307 * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist 308 * @qcp_fl: Pointer to base of the QCP freelist queue 309 * @rxbufs: Array of transmitted FL/RX buffers 310 * @xsk_rxbufs: Array of transmitted FL/RX buffers (for AF_XDP) 311 * @rxds: Virtual address of FL/RX ring in host memory 312 * @xdp_rxq: RX-ring info avail for XDP 313 * @dma: DMA address of the FL/RX ring 314 * @size: Size, in bytes, of the FL/RX ring (needed to free) 315 */ 316 struct 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 configuration 340 * @nfp_net: Backpointer to nfp_net structure 341 * @napi: NAPI structure for this ring vec 342 * @tasklet: ctrl vNIC, tasklet for servicing the r_vec 343 * @queue: ctrl vNIC, send queue 344 * @lock: ctrl vNIC, r_vec lock protects @queue 345 * @tx_ring: Pointer to TX ring 346 * @rx_ring: Pointer to RX ring 347 * @xdp_ring: Pointer to an extra TX ring for XDP 348 * @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 interrupt 351 * @rx_dim: Dynamic interrupt moderation structure for RX 352 * @tx_dim: Dynamic interrupt moderation structure for TX 353 * @rx_sync: Seqlock for atomic updates of RX stats 354 * @rx_pkts: Number of received packets 355 * @rx_bytes: Number of received bytes 356 * @rx_drops: Number of packets dropped on RX due to lack of resources 357 * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK 358 * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK 359 * @hw_csum_rx_complete: Counter of packets with CHECKSUM_COMPLETE reported 360 * @hw_csum_rx_error: Counter of packets with bad checksums 361 * @hw_tls_rx: Number of packets with TLS decrypted by hardware 362 * @tx_sync: Seqlock for atomic updates of TX stats 363 * @tx_pkts: Number of Transmitted packets 364 * @tx_bytes: Number of Transmitted bytes 365 * @hw_csum_tx: Counter of packets with TX checksum offload requested 366 * @hw_csum_tx_inner: Counter of inner TX checksum offload requests 367 * @tx_gather: Counter of packets with Gather DMA 368 * @tx_lso: Counter of LSO packets sent 369 * @hw_tls_tx: Counter of TLS packets sent with crypto offloaded to HW 370 * @tls_tx_fallback: Counter of TLS packets sent which had to be encrypted 371 * by the fallback path because packets came out of order 372 * @tls_tx_no_fallback: Counter of TLS packets not sent because the fallback 373 * path could not encrypt them 374 * @tx_errors: How many TX errors were encountered 375 * @tx_busy: How often was TX busy (no space)? 376 * @rx_replace_buf_alloc_fail: Counter of RX buffer allocation failures 377 * @irq_vector: Interrupt vector number (use for talking to the OS) 378 * @handler: Interrupt handler for this ring vector 379 * @name: Name of the interrupt vector 380 * @affinity_mask: SMP affinity mask for this vector 381 * 382 * This structure ties RX and TX rings to interrupt vectors and a NAPI 383 * context. This currently only supports one RX and TX ring per 384 * interrupt vector but might be extended in the future to allow 385 * association of multiple rings per vector. 386 */ 387 struct 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 */ 446 struct 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]: reserved 453 */ 454 u8 extend; 455 } __packed; 456 nfp_net_fw_ver_eq(struct nfp_net_fw_version * fw_ver,u8 extend,u8 class,u8 major,u8 minor)457 static 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 } 465 466 struct nfp_stat_pair { 467 u64 pkts; 468 u64 bytes; 469 }; 470 471 /** 472 * struct nfp_net_dp - NFP network device datapath data structure 473 * @dev: Backpointer to struct device 474 * @netdev: Backpointer to net_device structure 475 * @is_vf: Is the driver attached to a VF? 476 * @chained_metadata_format: Firemware will use new metadata format 477 * @ktls_tx: Is kTLS TX enabled? 478 * @rx_dma_dir: Mapping direction for RX buffers 479 * @rx_dma_off: Offset at which DMA packets (for XDP headroom) 480 * @rx_offset: Offset in the RX buffers where packet data starts 481 * @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 buffers 484 * @xdp_prog: Installed XDP program 485 * @tx_rings: Array of pre-allocated TX ring structures 486 * @rx_rings: Array of pre-allocated RX ring structures 487 * @ctrl_bar: Pointer to mapped control BAR 488 * 489 * @ops: Callbacks and parameters for this vNIC's NFD version 490 * @txrwb: TX pointer write back area (indexed by queue id) 491 * @txrwb_dma: TX pointer write back area DMA address 492 * @txd_cnt: Size of the TX ring in number of min size packets 493 * @rxd_cnt: Size of the RX ring in number of min size packets 494 * @num_r_vecs: Number of used ring vectors 495 * @num_tx_rings: Currently configured number of TX rings 496 * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) 497 * @num_rx_rings: Currently configured number of RX rings 498 * @mtu: Device MTU 499 * @xsk_pools: XSK buffer pools, @max_r_vecs in size (for AF_XDP). 500 */ 501 struct 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 structure 548 * @dp: Datapath structure 549 * @dev_info: NFP ASIC params 550 * @id: vNIC id within the PF (0 for VFs) 551 * @fw_ver: Firmware version 552 * @cap: Capabilities advertised by the Firmware 553 * @cap_w1: Extended capabilities word advertised by the Firmware 554 * @max_mtu: Maximum support MTU advertised by the Firmware 555 * @rss_hfunc: RSS selected hash function 556 * @rss_cfg: RSS configuration 557 * @rss_key: RSS secret key 558 * @rss_itbl: RSS indirection table 559 * @xdp: Information about the driver XDP program 560 * @xdp_hw: Information about the HW XDP program 561 * @max_r_vecs: Number of allocated interrupt vectors for RX/TX 562 * @max_tx_rings: Maximum number of TX rings supported by the Firmware 563 * @max_rx_rings: Maximum number of RX rings supported by the Firmware 564 * @stride_rx: Queue controller RX queue spacing 565 * @stride_tx: Queue controller TX queue spacing 566 * @r_vecs: Pre-allocated array of ring vectors 567 * @irq_entries: Pre-allocated array of MSI-X entries 568 * @lsc_handler: Handler for Link State Change interrupt 569 * @lsc_name: Name for Link State Change interrupt 570 * @exn_handler: Handler for Exception interrupt 571 * @exn_name: Name for Exception interrupt 572 * @shared_handler: Handler for shared interrupts 573 * @shared_name: Name for shared interrupt 574 * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active, 575 * @reconfig_sync_present and HW reconfiguration request 576 * regs/machinery from async requests (sync must take 577 * @bar_lock) 578 * @reconfig_posted: Pending reconfig bits coming from async sources 579 * @reconfig_timer_active: Timer for reading reconfiguration results is pending 580 * @reconfig_sync_present: Some thread is performing synchronous reconfig 581 * @reconfig_timer: Timer for async reading of reconfig results 582 * @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 TLV 585 * @link_up: Is the link up? 586 * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading 587 * @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 parameter 590 * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter 591 * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter 592 * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter 593 * @qcp_cfg: Pointer to QCP queue used for configuration notification 594 * @tx_bar: Pointer to mapped TX queues 595 * @rx_bar: Pointer to mapped FL/RX queues 596 * @xa_ipsec: IPsec xarray SA data 597 * @tlv_caps: Parsed TLV capabilities 598 * @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections 599 * @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections 600 * @ktls_conn_id_gen: Trivial generator for kTLS connection ids (for TX) 601 * @ktls_no_space: Counter of firmware rejecting kTLS connection due to 602 * lack of space 603 * @ktls_rx_resync_req: Counter of TLS RX resync requested 604 * @ktls_rx_resync_ign: Counter of TLS RX resync requests ignored 605 * @ktls_rx_resync_sent: Counter of TLS RX resync completed 606 * @mbox_cmsg: Common Control Message via vNIC mailbox state 607 * @mbox_cmsg.queue: CCM mbox queue of pending messages 608 * @mbox_cmsg.wq: CCM mbox wait queue of waiting processes 609 * @mbox_cmsg.workq: CCM mbox work queue for @wait_work and @runq_work 610 * @mbox_cmsg.wait_work: CCM mbox posted msg reconfig wait work 611 * @mbox_cmsg.runq_work: CCM mbox posted msg queue runner work 612 * @mbox_cmsg.tag: CCM mbox message tag allocator 613 * @debugfs_dir: Device directory in debugfs 614 * @vnic_list: Entry on device vNIC list 615 * @pdev: Backpointer to PCI device 616 * @app: APP handle if available 617 * @vnic_no_name: For non-port PF vNIC make ndo_get_phys_port_name return 618 * -EOPNOTSUPP to keep backwards compatibility (set by app) 619 * @port: Pointer to nfp_port structure if vNIC is a port 620 * @mbox_amsg: Asynchronously processed message via mailbox 621 * @mbox_amsg.lock: Protect message list 622 * @mbox_amsg.list: List of message to process 623 * @mbox_amsg.work: Work to process message asynchronously 624 * @fs: Flow steering 625 * @fs.count: Flow count 626 * @fs.list: List of flows 627 * @app_priv: APP private data for this vNIC 628 */ 629 struct 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_IPSEC 693 struct xarray xa_ipsec; 694 #endif 695 696 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 }; 741 742 struct 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 }; 766 767 struct 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 }; 773 774 int 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 BAR 778 * Performs any endian conversion necessary. 779 */ nn_readb(struct nfp_net * nn,int off)780 static inline u16 nn_readb(struct nfp_net *nn, int off) 781 { 782 return readb(nn->dp.ctrl_bar + off); 783 } 784 nn_writeb(struct nfp_net * nn,int off,u8 val)785 static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) 786 { 787 writeb(val, nn->dp.ctrl_bar + off); 788 } 789 nn_readw(struct nfp_net * nn,int off)790 static inline u16 nn_readw(struct nfp_net *nn, int off) 791 { 792 return readw(nn->dp.ctrl_bar + off); 793 } 794 nn_writew(struct nfp_net * nn,int off,u16 val)795 static inline void nn_writew(struct nfp_net *nn, int off, u16 val) 796 { 797 writew(val, nn->dp.ctrl_bar + off); 798 } 799 nn_readl(struct nfp_net * nn,int off)800 static inline u32 nn_readl(struct nfp_net *nn, int off) 801 { 802 return readl(nn->dp.ctrl_bar + off); 803 } 804 nn_writel(struct nfp_net * nn,int off,u32 val)805 static inline void nn_writel(struct nfp_net *nn, int off, u32 val) 806 { 807 writel(val, nn->dp.ctrl_bar + off); 808 } 809 nn_readq(struct nfp_net * nn,int off)810 static inline u64 nn_readq(struct nfp_net *nn, int off) 811 { 812 return readq(nn->dp.ctrl_bar + off); 813 } 814 nn_writeq(struct nfp_net * nn,int off,u64 val)815 static 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 */ nn_pci_flush(struct nfp_net * nn)821 static 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 Queue 829 * Controller Peripheral (QCP) address space on the NFP. A QCP queue 830 * has a read and a write pointer (as well as a size and flags, 831 * indicating overflow etc). The QCP offers a number of different 832 * operation on queue pointers, but here we only offer function to 833 * either add to a pointer or to read the pointer value. 834 */ 835 #define NFP_QCP_QUEUE_ADDR_SZ 0x800 836 #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) 837 #define NFP_QCP_QUEUE_ADD_RPTR 0x0000 838 #define NFP_QCP_QUEUE_ADD_WPTR 0x0004 839 #define NFP_QCP_QUEUE_STS_LO 0x0008 840 #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff 841 #define NFP_QCP_QUEUE_STS_HI 0x000c 842 #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff 843 844 /* nfp_qcp_ptr - Read or Write Pointer of a queue */ 845 enum nfp_qcp_ptr { 846 NFP_QCP_READ_PTR = 0, 847 NFP_QCP_WRITE_PTR 848 }; 849 850 /** 851 * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue 852 * 853 * @q: Base address for queue structure 854 * @val: Value to add to the queue pointer 855 */ nfp_qcp_rd_ptr_add(u8 __iomem * q,u32 val)856 static 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 queue 863 * 864 * @q: Base address for queue structure 865 * @val: Value to add to the queue pointer 866 */ nfp_qcp_wr_ptr_add(u8 __iomem * q,u32 val)867 static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) 868 { 869 writel(val, q + NFP_QCP_QUEUE_ADD_WPTR); 870 } 871 _nfp_qcp_read(u8 __iomem * q,enum nfp_qcp_ptr ptr)872 static 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 else 880 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 else 887 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 queue 892 * @q: Base address for queue structure 893 * 894 * Return: Value read. 895 */ nfp_qcp_rd_ptr_read(u8 __iomem * q)896 static 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 queue 903 * @q: Base address for queue structure 904 * 905 * Return: Value read. 906 */ nfp_qcp_wr_ptr_read(u8 __iomem * q)907 static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) 908 { 909 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); 910 } 911 912 u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue); 913 nfp_net_is_data_vnic(struct nfp_net * nn)914 static 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 nfp_net_running(struct nfp_net * nn)920 static inline bool nfp_net_running(struct nfp_net *nn) 921 { 922 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE; 923 } 924 nfp_net_name(struct nfp_net * nn)925 static inline const char *nfp_net_name(struct nfp_net *nn) 926 { 927 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl"; 928 } 929 nfp_ctrl_lock(struct nfp_net * nn)930 static 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 nfp_ctrl_unlock(struct nfp_net * nn)936 static 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 nn_ctrl_bar_lock(struct nfp_net * nn)942 static inline void nn_ctrl_bar_lock(struct nfp_net *nn) 943 { 944 down(&nn->bar_lock); 945 } 946 nn_ctrl_bar_trylock(struct nfp_net * nn)947 static inline bool nn_ctrl_bar_trylock(struct nfp_net *nn) 948 { 949 return !down_trylock(&nn->bar_lock); 950 } 951 nn_ctrl_bar_unlock(struct nfp_net * nn)952 static inline void nn_ctrl_bar_unlock(struct nfp_net *nn) 953 { 954 up(&nn->bar_lock); 955 } 956 957 /* Globals */ 958 extern const char nfp_driver_version[]; 959 960 extern const struct net_device_ops nfp_nfd3_netdev_ops; 961 extern const struct net_device_ops nfp_nfdk_netdev_ops; 962 nfp_netdev_is_nfp_net(struct net_device * netdev)963 static 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 nfp_net_coalesce_para_check(u32 param)969 static 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 */ 978 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, 979 void __iomem *ctrl_bar); 980 981 struct nfp_net * 982 nfp_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); 985 void nfp_net_free(struct nfp_net *nn); 986 987 int nfp_net_init(struct nfp_net *nn); 988 void nfp_net_clean(struct nfp_net *nn); 989 990 int nfp_ctrl_open(struct nfp_net *nn); 991 void nfp_ctrl_close(struct nfp_net *nn); 992 993 void nfp_net_set_ethtool_ops(struct net_device *netdev); 994 void nfp_net_info(struct nfp_net *nn); 995 int __nfp_net_reconfig(struct nfp_net *nn, u32 update); 996 int nfp_net_reconfig(struct nfp_net *nn, u32 update); 997 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn); 998 void nfp_net_rss_write_itbl(struct nfp_net *nn); 999 void nfp_net_rss_write_key(struct nfp_net *nn); 1000 void nfp_net_coalesce_write_cfg(struct nfp_net *nn); 1001 int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size); 1002 int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd); 1003 int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd); 1004 void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 update); 1005 int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn); 1006 1007 unsigned int 1008 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, 1009 unsigned int min_irqs, unsigned int want_irqs); 1010 void nfp_net_irqs_disable(struct pci_dev *pdev); 1011 void 1012 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, 1013 unsigned int n); 1014 struct sk_buff * 1015 nfp_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); 1017 void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle); 1018 1019 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn); 1020 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new, 1021 struct netlink_ext_ack *extack); 1022 1023 int nfp_net_fs_add_hw(struct nfp_net *nn, struct nfp_fs_entry *entry); 1024 int nfp_net_fs_del_hw(struct nfp_net *nn, struct nfp_fs_entry *entry); 1025 1026 #ifdef CONFIG_NFP_DEBUG 1027 void nfp_net_debugfs_create(void); 1028 void nfp_net_debugfs_destroy(void); 1029 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev); 1030 void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir); 1031 void nfp_net_debugfs_dir_clean(struct dentry **dir); 1032 #else nfp_net_debugfs_create(void)1033 static inline void nfp_net_debugfs_create(void) 1034 { 1035 } 1036 nfp_net_debugfs_destroy(void)1037 static inline void nfp_net_debugfs_destroy(void) 1038 { 1039 } 1040 nfp_net_debugfs_device_add(struct pci_dev * pdev)1041 static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) 1042 { 1043 return NULL; 1044 } 1045 1046 static inline void nfp_net_debugfs_vnic_add(struct nfp_net * nn,struct dentry * ddir)1047 nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir) 1048 { 1049 } 1050 nfp_net_debugfs_dir_clean(struct dentry ** dir)1051 static inline void nfp_net_debugfs_dir_clean(struct dentry **dir) 1052 { 1053 } 1054 #endif /* CONFIG_NFP_DEBUG */ 1055 1056 #endif /* _NFP_NET_H_ */ 1057