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 struct nfp_nfdk_tx_desc; 112 struct nfp_nfdk_tx_buf; 113 114 /* Convenience macro for wrapping descriptor index on ring size */ 115 #define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1)) 116 117 /* Convenience macro for writing dma address into RX/TX descriptors */ 118 #define nfp_desc_set_dma_addr_40b(desc, dma_addr) \ 119 do { \ 120 __typeof__(desc) __d = (desc); \ 121 dma_addr_t __addr = (dma_addr); \ 122 \ 123 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ 124 __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ 125 } while (0) 126 127 #define nfp_desc_set_dma_addr_48b(desc, dma_addr) \ 128 do { \ 129 __typeof__(desc) __d = (desc); \ 130 dma_addr_t __addr = (dma_addr); \ 131 \ 132 __d->dma_addr_hi = cpu_to_le16(upper_32_bits(__addr)); \ 133 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ 134 } while (0) 135 136 /** 137 * struct nfp_net_tx_ring - TX ring structure 138 * @r_vec: Back pointer to ring vector structure 139 * @idx: Ring index from Linux's perspective 140 * @data_pending: number of bytes added to current block (NFDK only) 141 * @qcp_q: Pointer to base of the QCP TX queue 142 * @txrwb: TX pointer write back area 143 * @cnt: Size of the queue in number of descriptors 144 * @wr_p: TX ring write pointer (free running) 145 * @rd_p: TX ring read pointer (free running) 146 * @qcp_rd_p: Local copy of QCP TX queue read pointer 147 * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer 148 * (used for .xmit_more delayed kick) 149 * @txbufs: Array of transmitted TX buffers, to free on transmit (NFD3) 150 * @ktxbufs: Array of transmitted TX buffers, to free on transmit (NFDK) 151 * @txds: Virtual address of TX ring in host memory (NFD3) 152 * @ktxds: Virtual address of TX ring in host memory (NFDK) 153 * 154 * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue 155 * @dma: DMA address of the TX ring 156 * @size: Size, in bytes, of the TX ring (needed to free) 157 * @is_xdp: Is this a XDP TX ring? 158 */ 159 struct nfp_net_tx_ring { 160 struct nfp_net_r_vector *r_vec; 161 162 u16 idx; 163 u16 data_pending; 164 u8 __iomem *qcp_q; 165 u64 *txrwb; 166 167 u32 cnt; 168 u32 wr_p; 169 u32 rd_p; 170 u32 qcp_rd_p; 171 172 u32 wr_ptr_add; 173 174 union { 175 struct nfp_nfd3_tx_buf *txbufs; 176 struct nfp_nfdk_tx_buf *ktxbufs; 177 }; 178 union { 179 struct nfp_nfd3_tx_desc *txds; 180 struct nfp_nfdk_tx_desc *ktxds; 181 }; 182 183 /* Cold data follows */ 184 int qcidx; 185 186 dma_addr_t dma; 187 size_t size; 188 bool is_xdp; 189 } ____cacheline_aligned; 190 191 /* RX and freelist descriptor format */ 192 193 #define PCIE_DESC_RX_DD BIT(7) 194 #define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) 195 196 /* Flags in the RX descriptor */ 197 #define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) 198 #define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) 199 #define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) 200 #define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) 201 #define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) 202 #define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) 203 #define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) 204 #define PCIE_DESC_RX_DECRYPTED cpu_to_le16(BIT(8)) 205 #define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) 206 #define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) 207 #define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) 208 #define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) 209 #define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) 210 #define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) 211 #define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) 212 #define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) 213 214 #define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ 215 PCIE_DESC_RX_TCP_CSUM | \ 216 PCIE_DESC_RX_UDP_CSUM | \ 217 PCIE_DESC_RX_I_IP4_CSUM | \ 218 PCIE_DESC_RX_I_TCP_CSUM | \ 219 PCIE_DESC_RX_I_UDP_CSUM) 220 #define PCIE_DESC_RX_CSUM_OK_SHIFT 1 221 #define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) 222 #define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ 223 PCIE_DESC_RX_CSUM_OK_SHIFT) 224 225 struct nfp_net_rx_desc { 226 union { 227 struct { 228 __le16 dma_addr_hi; /* High bits of the buf address */ 229 u8 reserved; /* Must be zero */ 230 u8 meta_len_dd; /* Must be zero */ 231 232 __le32 dma_addr_lo; /* Low bits of the buffer address */ 233 } __packed fld; 234 235 struct { 236 __le16 data_len; /* Length of the frame + meta data */ 237 u8 reserved; 238 u8 meta_len_dd; /* Length of meta data prepended + 239 * descriptor done flag. 240 */ 241 242 __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ 243 __le16 vlan; /* VLAN if stripped */ 244 } __packed rxd; 245 246 __le32 vals[2]; 247 }; 248 }; 249 250 #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0) 251 #define NFP_NET_VLAN_CTAG 0 252 #define NFP_NET_VLAN_STAG 1 253 254 struct nfp_meta_parsed { 255 u8 hash_type; 256 u8 csum_type; 257 u32 hash; 258 u32 mark; 259 u32 portid; 260 __wsum csum; 261 struct { 262 bool stripped; 263 u8 tpid; 264 u16 tci; 265 } vlan; 266 267 #ifdef CONFIG_NFP_NET_IPSEC 268 u32 ipsec_saidx; 269 #endif 270 }; 271 272 struct nfp_net_rx_hash { 273 __be32 hash_type; 274 __be32 hash; 275 }; 276 277 /** 278 * struct nfp_net_rx_buf - software RX buffer descriptor 279 * @frag: page fragment buffer 280 * @dma_addr: DMA mapping address of the buffer 281 */ 282 struct nfp_net_rx_buf { 283 void *frag; 284 dma_addr_t dma_addr; 285 }; 286 287 /** 288 * struct nfp_net_xsk_rx_buf - software RX XSK buffer descriptor 289 * @dma_addr: DMA mapping address of the buffer 290 * @xdp: XSK buffer pool handle (for AF_XDP) 291 */ 292 struct nfp_net_xsk_rx_buf { 293 dma_addr_t dma_addr; 294 struct xdp_buff *xdp; 295 }; 296 297 /** 298 * struct nfp_net_rx_ring - RX ring structure 299 * @r_vec: Back pointer to ring vector structure 300 * @cnt: Size of the queue in number of descriptors 301 * @wr_p: FL/RX ring write pointer (free running) 302 * @rd_p: FL/RX ring read pointer (free running) 303 * @idx: Ring index from Linux's perspective 304 * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist 305 * @qcp_fl: Pointer to base of the QCP freelist queue 306 * @rxbufs: Array of transmitted FL/RX buffers 307 * @xsk_rxbufs: Array of transmitted FL/RX buffers (for AF_XDP) 308 * @rxds: Virtual address of FL/RX ring in host memory 309 * @xdp_rxq: RX-ring info avail for XDP 310 * @dma: DMA address of the FL/RX ring 311 * @size: Size, in bytes, of the FL/RX ring (needed to free) 312 */ 313 struct nfp_net_rx_ring { 314 struct nfp_net_r_vector *r_vec; 315 316 u32 cnt; 317 u32 wr_p; 318 u32 rd_p; 319 320 u32 idx; 321 322 int fl_qcidx; 323 u8 __iomem *qcp_fl; 324 325 struct nfp_net_rx_buf *rxbufs; 326 struct nfp_net_xsk_rx_buf *xsk_rxbufs; 327 struct nfp_net_rx_desc *rxds; 328 329 struct xdp_rxq_info xdp_rxq; 330 331 dma_addr_t dma; 332 size_t size; 333 } ____cacheline_aligned; 334 335 /** 336 * struct nfp_net_r_vector - Per ring interrupt vector configuration 337 * @nfp_net: Backpointer to nfp_net structure 338 * @napi: NAPI structure for this ring vec 339 * @tasklet: ctrl vNIC, tasklet for servicing the r_vec 340 * @queue: ctrl vNIC, send queue 341 * @lock: ctrl vNIC, r_vec lock protects @queue 342 * @tx_ring: Pointer to TX ring 343 * @rx_ring: Pointer to RX ring 344 * @xdp_ring: Pointer to an extra TX ring for XDP 345 * @xsk_pool: XSK buffer pool active on vector queue pair (for AF_XDP) 346 * @irq_entry: MSI-X table entry (use for talking to the device) 347 * @event_ctr: Number of interrupt 348 * @rx_dim: Dynamic interrupt moderation structure for RX 349 * @tx_dim: Dynamic interrupt moderation structure for TX 350 * @rx_sync: Seqlock for atomic updates of RX stats 351 * @rx_pkts: Number of received packets 352 * @rx_bytes: Number of received bytes 353 * @rx_drops: Number of packets dropped on RX due to lack of resources 354 * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK 355 * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK 356 * @hw_csum_rx_complete: Counter of packets with CHECKSUM_COMPLETE reported 357 * @hw_csum_rx_error: Counter of packets with bad checksums 358 * @hw_tls_rx: Number of packets with TLS decrypted by hardware 359 * @tx_sync: Seqlock for atomic updates of TX stats 360 * @tx_pkts: Number of Transmitted packets 361 * @tx_bytes: Number of Transmitted bytes 362 * @hw_csum_tx: Counter of packets with TX checksum offload requested 363 * @hw_csum_tx_inner: Counter of inner TX checksum offload requests 364 * @tx_gather: Counter of packets with Gather DMA 365 * @tx_lso: Counter of LSO packets sent 366 * @hw_tls_tx: Counter of TLS packets sent with crypto offloaded to HW 367 * @tls_tx_fallback: Counter of TLS packets sent which had to be encrypted 368 * by the fallback path because packets came out of order 369 * @tls_tx_no_fallback: Counter of TLS packets not sent because the fallback 370 * path could not encrypt them 371 * @tx_errors: How many TX errors were encountered 372 * @tx_busy: How often was TX busy (no space)? 373 * @rx_replace_buf_alloc_fail: Counter of RX buffer allocation failures 374 * @irq_vector: Interrupt vector number (use for talking to the OS) 375 * @handler: Interrupt handler for this ring vector 376 * @name: Name of the interrupt vector 377 * @affinity_mask: SMP affinity mask for this vector 378 * 379 * This structure ties RX and TX rings to interrupt vectors and a NAPI 380 * context. This currently only supports one RX and TX ring per 381 * interrupt vector but might be extended in the future to allow 382 * association of multiple rings per vector. 383 */ 384 struct nfp_net_r_vector { 385 struct nfp_net *nfp_net; 386 union { 387 struct napi_struct napi; 388 struct { 389 struct tasklet_struct tasklet; 390 struct sk_buff_head queue; 391 spinlock_t lock; 392 }; 393 }; 394 395 struct nfp_net_tx_ring *tx_ring; 396 struct nfp_net_rx_ring *rx_ring; 397 398 u16 irq_entry; 399 400 u16 event_ctr; 401 struct dim rx_dim; 402 struct dim tx_dim; 403 404 struct u64_stats_sync rx_sync; 405 u64 rx_pkts; 406 u64 rx_bytes; 407 u64 rx_drops; 408 u64 hw_csum_rx_ok; 409 u64 hw_csum_rx_inner_ok; 410 u64 hw_csum_rx_complete; 411 u64 hw_tls_rx; 412 413 u64 hw_csum_rx_error; 414 u64 rx_replace_buf_alloc_fail; 415 416 struct nfp_net_tx_ring *xdp_ring; 417 struct xsk_buff_pool *xsk_pool; 418 419 struct u64_stats_sync tx_sync; 420 u64 tx_pkts; 421 u64 tx_bytes; 422 423 u64 ____cacheline_aligned_in_smp hw_csum_tx; 424 u64 hw_csum_tx_inner; 425 u64 tx_gather; 426 u64 tx_lso; 427 u64 hw_tls_tx; 428 429 u64 tls_tx_fallback; 430 u64 tls_tx_no_fallback; 431 u64 tx_errors; 432 u64 tx_busy; 433 434 /* Cold data follows */ 435 436 u32 irq_vector; 437 irq_handler_t handler; 438 char name[IFNAMSIZ + 8]; 439 cpumask_t affinity_mask; 440 } ____cacheline_aligned; 441 442 /* Firmware version as it is written in the 32bit value in the BAR */ 443 struct nfp_net_fw_version { 444 u8 minor; 445 u8 major; 446 u8 class; 447 448 /* This byte can be exploited for more use, currently, 449 * BIT0: dp type, BIT[7:1]: reserved 450 */ 451 u8 extend; 452 } __packed; 453 454 static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, 455 u8 extend, u8 class, u8 major, u8 minor) 456 { 457 return fw_ver->extend == extend && 458 fw_ver->class == class && 459 fw_ver->major == major && 460 fw_ver->minor == minor; 461 } 462 463 struct nfp_stat_pair { 464 u64 pkts; 465 u64 bytes; 466 }; 467 468 /** 469 * struct nfp_net_dp - NFP network device datapath data structure 470 * @dev: Backpointer to struct device 471 * @netdev: Backpointer to net_device structure 472 * @is_vf: Is the driver attached to a VF? 473 * @chained_metadata_format: Firemware will use new metadata format 474 * @ktls_tx: Is kTLS TX enabled? 475 * @rx_dma_dir: Mapping direction for RX buffers 476 * @rx_dma_off: Offset at which DMA packets (for XDP headroom) 477 * @rx_offset: Offset in the RX buffers where packet data starts 478 * @ctrl: Local copy of the control register/word. 479 * @fl_bufsz: Currently configured size of the freelist buffers 480 * @xdp_prog: Installed XDP program 481 * @tx_rings: Array of pre-allocated TX ring structures 482 * @rx_rings: Array of pre-allocated RX ring structures 483 * @ctrl_bar: Pointer to mapped control BAR 484 * 485 * @ops: Callbacks and parameters for this vNIC's NFD version 486 * @txrwb: TX pointer write back area (indexed by queue id) 487 * @txrwb_dma: TX pointer write back area DMA address 488 * @txd_cnt: Size of the TX ring in number of min size packets 489 * @rxd_cnt: Size of the RX ring in number of min size packets 490 * @num_r_vecs: Number of used ring vectors 491 * @num_tx_rings: Currently configured number of TX rings 492 * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) 493 * @num_rx_rings: Currently configured number of RX rings 494 * @mtu: Device MTU 495 * @xsk_pools: XSK buffer pools, @max_r_vecs in size (for AF_XDP). 496 */ 497 struct nfp_net_dp { 498 struct device *dev; 499 struct net_device *netdev; 500 501 u8 is_vf:1; 502 u8 chained_metadata_format:1; 503 u8 ktls_tx:1; 504 505 u8 rx_dma_dir; 506 u8 rx_offset; 507 508 u32 rx_dma_off; 509 510 u32 ctrl; 511 u32 fl_bufsz; 512 513 struct bpf_prog *xdp_prog; 514 515 struct nfp_net_tx_ring *tx_rings; 516 struct nfp_net_rx_ring *rx_rings; 517 518 u8 __iomem *ctrl_bar; 519 520 /* Cold data follows */ 521 522 const struct nfp_dp_ops *ops; 523 524 u64 *txrwb; 525 dma_addr_t txrwb_dma; 526 527 unsigned int txd_cnt; 528 unsigned int rxd_cnt; 529 530 unsigned int num_r_vecs; 531 532 unsigned int num_tx_rings; 533 unsigned int num_stack_tx_rings; 534 unsigned int num_rx_rings; 535 536 unsigned int mtu; 537 538 struct xsk_buff_pool **xsk_pools; 539 }; 540 541 /** 542 * struct nfp_net - NFP network device structure 543 * @dp: Datapath structure 544 * @dev_info: NFP ASIC params 545 * @id: vNIC id within the PF (0 for VFs) 546 * @fw_ver: Firmware version 547 * @cap: Capabilities advertised by the Firmware 548 * @cap_w1: Extended capabilities word advertised by the Firmware 549 * @max_mtu: Maximum support MTU advertised by the Firmware 550 * @rss_hfunc: RSS selected hash function 551 * @rss_cfg: RSS configuration 552 * @rss_key: RSS secret key 553 * @rss_itbl: RSS indirection table 554 * @xdp: Information about the driver XDP program 555 * @xdp_hw: Information about the HW XDP program 556 * @max_r_vecs: Number of allocated interrupt vectors for RX/TX 557 * @max_tx_rings: Maximum number of TX rings supported by the Firmware 558 * @max_rx_rings: Maximum number of RX rings supported by the Firmware 559 * @stride_rx: Queue controller RX queue spacing 560 * @stride_tx: Queue controller TX queue spacing 561 * @r_vecs: Pre-allocated array of ring vectors 562 * @irq_entries: Pre-allocated array of MSI-X entries 563 * @lsc_handler: Handler for Link State Change interrupt 564 * @lsc_name: Name for Link State Change interrupt 565 * @exn_handler: Handler for Exception interrupt 566 * @exn_name: Name for Exception interrupt 567 * @shared_handler: Handler for shared interrupts 568 * @shared_name: Name for shared interrupt 569 * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active, 570 * @reconfig_sync_present and HW reconfiguration request 571 * regs/machinery from async requests (sync must take 572 * @bar_lock) 573 * @reconfig_posted: Pending reconfig bits coming from async sources 574 * @reconfig_timer_active: Timer for reading reconfiguration results is pending 575 * @reconfig_sync_present: Some thread is performing synchronous reconfig 576 * @reconfig_timer: Timer for async reading of reconfig results 577 * @reconfig_in_progress_update: Update FW is processing now (debug only) 578 * @bar_lock: vNIC config BAR access lock, protects: update, 579 * mailbox area, crypto TLV 580 * @link_up: Is the link up? 581 * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading 582 * @rx_coalesce_adapt_on: Is RX interrupt moderation adaptive? 583 * @tx_coalesce_adapt_on: Is TX interrupt moderation adaptive? 584 * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter 585 * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter 586 * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter 587 * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter 588 * @qcp_cfg: Pointer to QCP queue used for configuration notification 589 * @tx_bar: Pointer to mapped TX queues 590 * @rx_bar: Pointer to mapped FL/RX queues 591 * @xa_ipsec: IPsec xarray SA data 592 * @tlv_caps: Parsed TLV capabilities 593 * @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections 594 * @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections 595 * @ktls_conn_id_gen: Trivial generator for kTLS connection ids (for TX) 596 * @ktls_no_space: Counter of firmware rejecting kTLS connection due to 597 * lack of space 598 * @ktls_rx_resync_req: Counter of TLS RX resync requested 599 * @ktls_rx_resync_ign: Counter of TLS RX resync requests ignored 600 * @ktls_rx_resync_sent: Counter of TLS RX resync completed 601 * @mbox_cmsg: Common Control Message via vNIC mailbox state 602 * @mbox_cmsg.queue: CCM mbox queue of pending messages 603 * @mbox_cmsg.wq: CCM mbox wait queue of waiting processes 604 * @mbox_cmsg.workq: CCM mbox work queue for @wait_work and @runq_work 605 * @mbox_cmsg.wait_work: CCM mbox posted msg reconfig wait work 606 * @mbox_cmsg.runq_work: CCM mbox posted msg queue runner work 607 * @mbox_cmsg.tag: CCM mbox message tag allocator 608 * @debugfs_dir: Device directory in debugfs 609 * @vnic_list: Entry on device vNIC list 610 * @pdev: Backpointer to PCI device 611 * @app: APP handle if available 612 * @vnic_no_name: For non-port PF vNIC make ndo_get_phys_port_name return 613 * -EOPNOTSUPP to keep backwards compatibility (set by app) 614 * @port: Pointer to nfp_port structure if vNIC is a port 615 * @app_priv: APP private data for this vNIC 616 */ 617 struct nfp_net { 618 struct nfp_net_dp dp; 619 620 const struct nfp_dev_info *dev_info; 621 struct nfp_net_fw_version fw_ver; 622 623 u32 id; 624 625 u32 cap; 626 u32 cap_w1; 627 u32 max_mtu; 628 629 u8 rss_hfunc; 630 u32 rss_cfg; 631 u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; 632 u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; 633 634 struct xdp_attachment_info xdp; 635 struct xdp_attachment_info xdp_hw; 636 637 unsigned int max_tx_rings; 638 unsigned int max_rx_rings; 639 640 int stride_tx; 641 int stride_rx; 642 643 unsigned int max_r_vecs; 644 struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS]; 645 struct msix_entry irq_entries[NFP_NET_MAX_IRQS]; 646 647 irq_handler_t lsc_handler; 648 char lsc_name[IFNAMSIZ + 8]; 649 650 irq_handler_t exn_handler; 651 char exn_name[IFNAMSIZ + 8]; 652 653 irq_handler_t shared_handler; 654 char shared_name[IFNAMSIZ + 8]; 655 656 bool link_up; 657 spinlock_t link_status_lock; 658 659 spinlock_t reconfig_lock; 660 u32 reconfig_posted; 661 bool reconfig_timer_active; 662 bool reconfig_sync_present; 663 struct timer_list reconfig_timer; 664 u32 reconfig_in_progress_update; 665 666 struct semaphore bar_lock; 667 668 bool rx_coalesce_adapt_on; 669 bool tx_coalesce_adapt_on; 670 u32 rx_coalesce_usecs; 671 u32 rx_coalesce_max_frames; 672 u32 tx_coalesce_usecs; 673 u32 tx_coalesce_max_frames; 674 675 u8 __iomem *qcp_cfg; 676 677 u8 __iomem *tx_bar; 678 u8 __iomem *rx_bar; 679 680 #ifdef CONFIG_NFP_NET_IPSEC 681 struct xarray xa_ipsec; 682 #endif 683 684 struct nfp_net_tlv_caps tlv_caps; 685 686 unsigned int ktls_tx_conn_cnt; 687 unsigned int ktls_rx_conn_cnt; 688 689 atomic64_t ktls_conn_id_gen; 690 691 atomic_t ktls_no_space; 692 atomic_t ktls_rx_resync_req; 693 atomic_t ktls_rx_resync_ign; 694 atomic_t ktls_rx_resync_sent; 695 696 struct { 697 struct sk_buff_head queue; 698 wait_queue_head_t wq; 699 struct workqueue_struct *workq; 700 struct work_struct wait_work; 701 struct work_struct runq_work; 702 u16 tag; 703 } mbox_cmsg; 704 705 struct dentry *debugfs_dir; 706 707 struct list_head vnic_list; 708 709 struct pci_dev *pdev; 710 struct nfp_app *app; 711 712 bool vnic_no_name; 713 714 struct nfp_port *port; 715 716 void *app_priv; 717 }; 718 719 /* Functions to read/write from/to a BAR 720 * Performs any endian conversion necessary. 721 */ 722 static inline u16 nn_readb(struct nfp_net *nn, int off) 723 { 724 return readb(nn->dp.ctrl_bar + off); 725 } 726 727 static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) 728 { 729 writeb(val, nn->dp.ctrl_bar + off); 730 } 731 732 static inline u16 nn_readw(struct nfp_net *nn, int off) 733 { 734 return readw(nn->dp.ctrl_bar + off); 735 } 736 737 static inline void nn_writew(struct nfp_net *nn, int off, u16 val) 738 { 739 writew(val, nn->dp.ctrl_bar + off); 740 } 741 742 static inline u32 nn_readl(struct nfp_net *nn, int off) 743 { 744 return readl(nn->dp.ctrl_bar + off); 745 } 746 747 static inline void nn_writel(struct nfp_net *nn, int off, u32 val) 748 { 749 writel(val, nn->dp.ctrl_bar + off); 750 } 751 752 static inline u64 nn_readq(struct nfp_net *nn, int off) 753 { 754 return readq(nn->dp.ctrl_bar + off); 755 } 756 757 static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) 758 { 759 writeq(val, nn->dp.ctrl_bar + off); 760 } 761 762 /* Flush posted PCI writes by reading something without side effects */ 763 static inline void nn_pci_flush(struct nfp_net *nn) 764 { 765 nn_readl(nn, NFP_NET_CFG_VERSION); 766 } 767 768 /* Queue Controller Peripheral access functions and definitions. 769 * 770 * Some of the BARs of the NFP are mapped to portions of the Queue 771 * Controller Peripheral (QCP) address space on the NFP. A QCP queue 772 * has a read and a write pointer (as well as a size and flags, 773 * indicating overflow etc). The QCP offers a number of different 774 * operation on queue pointers, but here we only offer function to 775 * either add to a pointer or to read the pointer value. 776 */ 777 #define NFP_QCP_QUEUE_ADDR_SZ 0x800 778 #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) 779 #define NFP_QCP_QUEUE_ADD_RPTR 0x0000 780 #define NFP_QCP_QUEUE_ADD_WPTR 0x0004 781 #define NFP_QCP_QUEUE_STS_LO 0x0008 782 #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff 783 #define NFP_QCP_QUEUE_STS_HI 0x000c 784 #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff 785 786 /* nfp_qcp_ptr - Read or Write Pointer of a queue */ 787 enum nfp_qcp_ptr { 788 NFP_QCP_READ_PTR = 0, 789 NFP_QCP_WRITE_PTR 790 }; 791 792 /** 793 * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue 794 * 795 * @q: Base address for queue structure 796 * @val: Value to add to the queue pointer 797 */ 798 static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) 799 { 800 writel(val, q + NFP_QCP_QUEUE_ADD_RPTR); 801 } 802 803 /** 804 * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue 805 * 806 * @q: Base address for queue structure 807 * @val: Value to add to the queue pointer 808 */ 809 static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) 810 { 811 writel(val, q + NFP_QCP_QUEUE_ADD_WPTR); 812 } 813 814 static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) 815 { 816 u32 off; 817 u32 val; 818 819 if (ptr == NFP_QCP_READ_PTR) 820 off = NFP_QCP_QUEUE_STS_LO; 821 else 822 off = NFP_QCP_QUEUE_STS_HI; 823 824 val = readl(q + off); 825 826 if (ptr == NFP_QCP_READ_PTR) 827 return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; 828 else 829 return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; 830 } 831 832 /** 833 * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue 834 * @q: Base address for queue structure 835 * 836 * Return: Value read. 837 */ 838 static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) 839 { 840 return _nfp_qcp_read(q, NFP_QCP_READ_PTR); 841 } 842 843 /** 844 * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue 845 * @q: Base address for queue structure 846 * 847 * Return: Value read. 848 */ 849 static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) 850 { 851 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); 852 } 853 854 u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue); 855 856 static inline bool nfp_net_is_data_vnic(struct nfp_net *nn) 857 { 858 WARN_ON_ONCE(!nn->dp.netdev && nn->port); 859 return !!nn->dp.netdev; 860 } 861 862 static inline bool nfp_net_running(struct nfp_net *nn) 863 { 864 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE; 865 } 866 867 static inline const char *nfp_net_name(struct nfp_net *nn) 868 { 869 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl"; 870 } 871 872 static inline void nfp_ctrl_lock(struct nfp_net *nn) 873 __acquires(&nn->r_vecs[0].lock) 874 { 875 spin_lock_bh(&nn->r_vecs[0].lock); 876 } 877 878 static inline void nfp_ctrl_unlock(struct nfp_net *nn) 879 __releases(&nn->r_vecs[0].lock) 880 { 881 spin_unlock_bh(&nn->r_vecs[0].lock); 882 } 883 884 static inline void nn_ctrl_bar_lock(struct nfp_net *nn) 885 { 886 down(&nn->bar_lock); 887 } 888 889 static inline bool nn_ctrl_bar_trylock(struct nfp_net *nn) 890 { 891 return !down_trylock(&nn->bar_lock); 892 } 893 894 static inline void nn_ctrl_bar_unlock(struct nfp_net *nn) 895 { 896 up(&nn->bar_lock); 897 } 898 899 /* Globals */ 900 extern const char nfp_driver_version[]; 901 902 extern const struct net_device_ops nfp_nfd3_netdev_ops; 903 extern const struct net_device_ops nfp_nfdk_netdev_ops; 904 905 static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev) 906 { 907 return netdev->netdev_ops == &nfp_nfd3_netdev_ops || 908 netdev->netdev_ops == &nfp_nfdk_netdev_ops; 909 } 910 911 static inline int nfp_net_coalesce_para_check(u32 usecs, u32 pkts) 912 { 913 if ((usecs >= ((1 << 16) - 1)) || (pkts >= ((1 << 16) - 1))) 914 return -EINVAL; 915 916 return 0; 917 } 918 919 /* Prototypes */ 920 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, 921 void __iomem *ctrl_bar); 922 923 struct nfp_net * 924 nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info, 925 void __iomem *ctrl_bar, bool needs_netdev, 926 unsigned int max_tx_rings, unsigned int max_rx_rings); 927 void nfp_net_free(struct nfp_net *nn); 928 929 int nfp_net_init(struct nfp_net *nn); 930 void nfp_net_clean(struct nfp_net *nn); 931 932 int nfp_ctrl_open(struct nfp_net *nn); 933 void nfp_ctrl_close(struct nfp_net *nn); 934 935 void nfp_net_set_ethtool_ops(struct net_device *netdev); 936 void nfp_net_info(struct nfp_net *nn); 937 int __nfp_net_reconfig(struct nfp_net *nn, u32 update); 938 int nfp_net_reconfig(struct nfp_net *nn, u32 update); 939 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn); 940 void nfp_net_rss_write_itbl(struct nfp_net *nn); 941 void nfp_net_rss_write_key(struct nfp_net *nn); 942 void nfp_net_coalesce_write_cfg(struct nfp_net *nn); 943 int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size); 944 int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd); 945 int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd); 946 void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 update); 947 int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn); 948 949 unsigned int 950 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, 951 unsigned int min_irqs, unsigned int want_irqs); 952 void nfp_net_irqs_disable(struct pci_dev *pdev); 953 void 954 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, 955 unsigned int n); 956 struct sk_buff * 957 nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, 958 struct sk_buff *skb, u64 *tls_handle, int *nr_frags); 959 void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle); 960 961 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn); 962 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new, 963 struct netlink_ext_ack *extack); 964 965 #ifdef CONFIG_NFP_DEBUG 966 void nfp_net_debugfs_create(void); 967 void nfp_net_debugfs_destroy(void); 968 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev); 969 void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir); 970 void nfp_net_debugfs_dir_clean(struct dentry **dir); 971 #else 972 static inline void nfp_net_debugfs_create(void) 973 { 974 } 975 976 static inline void nfp_net_debugfs_destroy(void) 977 { 978 } 979 980 static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) 981 { 982 return NULL; 983 } 984 985 static inline void 986 nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir) 987 { 988 } 989 990 static inline void nfp_net_debugfs_dir_clean(struct dentry **dir) 991 { 992 } 993 #endif /* CONFIG_NFP_DEBUG */ 994 995 #endif /* _NFP_NET_H_ */ 996