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 /* Max bits in DMA address */ 67 #define NFP_NET_MAX_DMA_BITS 40 68 69 /* Default size for MTU and freelist buffer sizes */ 70 #define NFP_NET_DEFAULT_MTU 1500U 71 72 /* Maximum number of bytes prepended to a packet */ 73 #define NFP_NET_MAX_PREPEND 64 74 75 /* Interrupt definitions */ 76 #define NFP_NET_NON_Q_VECTORS 2 77 #define NFP_NET_IRQ_LSC_IDX 0 78 #define NFP_NET_IRQ_EXN_IDX 1 79 #define NFP_NET_MIN_VNIC_IRQS (NFP_NET_NON_Q_VECTORS + 1) 80 81 /* Queue/Ring definitions */ 82 #define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */ 83 #define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */ 84 #define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \ 85 NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS) 86 #define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS) 87 88 #define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */ 89 #define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */ 90 #define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */ 91 #define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */ 92 93 #define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */ 94 #define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */ 95 96 #define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */ 97 #define NFP_NET_XDP_MAX_COMPLETE 2048 /* XDP bufs to reclaim in NAPI poll */ 98 99 /* Offload definitions */ 100 #define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) 101 102 #define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN) 103 #define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \ 104 SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) 105 106 /* Forward declarations */ 107 struct nfp_cpp; 108 struct nfp_eth_table_port; 109 struct nfp_net; 110 struct nfp_net_r_vector; 111 struct nfp_port; 112 113 /* Convenience macro for wrapping descriptor index on ring size */ 114 #define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1)) 115 116 /* Convenience macro for writing dma address into RX/TX descriptors */ 117 #define nfp_desc_set_dma_addr(desc, dma_addr) \ 118 do { \ 119 __typeof(desc) __d = (desc); \ 120 dma_addr_t __addr = (dma_addr); \ 121 \ 122 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ 123 __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ 124 } while (0) 125 126 /* TX descriptor format */ 127 128 #define PCIE_DESC_TX_EOP BIT(7) 129 #define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) 130 #define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0) 131 132 /* Flags in the host TX descriptor */ 133 #define PCIE_DESC_TX_CSUM BIT(7) 134 #define PCIE_DESC_TX_IP4_CSUM BIT(6) 135 #define PCIE_DESC_TX_TCP_CSUM BIT(5) 136 #define PCIE_DESC_TX_UDP_CSUM BIT(4) 137 #define PCIE_DESC_TX_VLAN BIT(3) 138 #define PCIE_DESC_TX_LSO BIT(2) 139 #define PCIE_DESC_TX_ENCAP BIT(1) 140 #define PCIE_DESC_TX_O_IP4_CSUM BIT(0) 141 142 struct nfp_net_tx_desc { 143 union { 144 struct { 145 u8 dma_addr_hi; /* High bits of host buf address */ 146 __le16 dma_len; /* Length to DMA for this desc */ 147 u8 offset_eop; /* Offset in buf where pkt starts + 148 * highest bit is eop flag. 149 */ 150 __le32 dma_addr_lo; /* Low 32bit of host buf addr */ 151 152 __le16 mss; /* MSS to be used for LSO */ 153 u8 lso_hdrlen; /* LSO, TCP payload offset */ 154 u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ 155 union { 156 struct { 157 u8 l3_offset; /* L3 header offset */ 158 u8 l4_offset; /* L4 header offset */ 159 }; 160 __le16 vlan; /* VLAN tag to add if indicated */ 161 }; 162 __le16 data_len; /* Length of frame + meta data */ 163 } __packed; 164 __le32 vals[4]; 165 __le64 vals8[2]; 166 }; 167 }; 168 169 /** 170 * struct nfp_net_tx_buf - software TX buffer descriptor 171 * @skb: normal ring, sk_buff associated with this buffer 172 * @frag: XDP ring, page frag associated with this buffer 173 * @dma_addr: DMA mapping address of the buffer 174 * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) 175 * @pkt_cnt: Number of packets to be produced out of the skb associated 176 * with this buffer (valid only on the head's buffer). 177 * Will be 1 for all non-TSO packets. 178 * @real_len: Number of bytes which to be produced out of the skb (valid only 179 * on the head's buffer). Equal to skb->len for non-TSO packets. 180 */ 181 struct nfp_net_tx_buf { 182 union { 183 struct sk_buff *skb; 184 void *frag; 185 }; 186 dma_addr_t dma_addr; 187 short int fidx; 188 u16 pkt_cnt; 189 u32 real_len; 190 }; 191 192 /** 193 * struct nfp_net_tx_ring - TX ring structure 194 * @r_vec: Back pointer to ring vector structure 195 * @idx: Ring index from Linux's perspective 196 * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue 197 * @qcp_q: Pointer to base of the QCP TX queue 198 * @cnt: Size of the queue in number of descriptors 199 * @wr_p: TX ring write pointer (free running) 200 * @rd_p: TX ring read pointer (free running) 201 * @qcp_rd_p: Local copy of QCP TX queue read pointer 202 * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer 203 * (used for .xmit_more delayed kick) 204 * @txbufs: Array of transmitted TX buffers, to free on transmit 205 * @txds: Virtual address of TX ring in host memory 206 * @dma: DMA address of the TX ring 207 * @size: Size, in bytes, of the TX ring (needed to free) 208 * @is_xdp: Is this a XDP TX ring? 209 */ 210 struct nfp_net_tx_ring { 211 struct nfp_net_r_vector *r_vec; 212 213 u32 idx; 214 int qcidx; 215 u8 __iomem *qcp_q; 216 217 u32 cnt; 218 u32 wr_p; 219 u32 rd_p; 220 u32 qcp_rd_p; 221 222 u32 wr_ptr_add; 223 224 struct nfp_net_tx_buf *txbufs; 225 struct nfp_net_tx_desc *txds; 226 227 dma_addr_t dma; 228 size_t size; 229 bool is_xdp; 230 } ____cacheline_aligned; 231 232 /* RX and freelist descriptor format */ 233 234 #define PCIE_DESC_RX_DD BIT(7) 235 #define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) 236 237 /* Flags in the RX descriptor */ 238 #define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) 239 #define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) 240 #define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) 241 #define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) 242 #define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) 243 #define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) 244 #define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) 245 #define PCIE_DESC_RX_DECRYPTED cpu_to_le16(BIT(8)) 246 #define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) 247 #define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) 248 #define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) 249 #define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) 250 #define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) 251 #define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) 252 #define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) 253 #define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) 254 255 #define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ 256 PCIE_DESC_RX_TCP_CSUM | \ 257 PCIE_DESC_RX_UDP_CSUM | \ 258 PCIE_DESC_RX_I_IP4_CSUM | \ 259 PCIE_DESC_RX_I_TCP_CSUM | \ 260 PCIE_DESC_RX_I_UDP_CSUM) 261 #define PCIE_DESC_RX_CSUM_OK_SHIFT 1 262 #define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) 263 #define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ 264 PCIE_DESC_RX_CSUM_OK_SHIFT) 265 266 struct nfp_net_rx_desc { 267 union { 268 struct { 269 u8 dma_addr_hi; /* High bits of the buf address */ 270 __le16 reserved; /* Must be zero */ 271 u8 meta_len_dd; /* Must be zero */ 272 273 __le32 dma_addr_lo; /* Low bits of the buffer address */ 274 } __packed fld; 275 276 struct { 277 __le16 data_len; /* Length of the frame + meta data */ 278 u8 reserved; 279 u8 meta_len_dd; /* Length of meta data prepended + 280 * descriptor done flag. 281 */ 282 283 __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ 284 __le16 vlan; /* VLAN if stripped */ 285 } __packed rxd; 286 287 __le32 vals[2]; 288 }; 289 }; 290 291 #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0) 292 293 struct nfp_meta_parsed { 294 u8 hash_type; 295 u8 csum_type; 296 u32 hash; 297 u32 mark; 298 u32 portid; 299 __wsum csum; 300 }; 301 302 struct nfp_net_rx_hash { 303 __be32 hash_type; 304 __be32 hash; 305 }; 306 307 /** 308 * struct nfp_net_rx_buf - software RX buffer descriptor 309 * @frag: page fragment buffer 310 * @dma_addr: DMA mapping address of the buffer 311 */ 312 struct nfp_net_rx_buf { 313 void *frag; 314 dma_addr_t dma_addr; 315 }; 316 317 /** 318 * struct nfp_net_rx_ring - RX ring structure 319 * @r_vec: Back pointer to ring vector structure 320 * @cnt: Size of the queue in number of descriptors 321 * @wr_p: FL/RX ring write pointer (free running) 322 * @rd_p: FL/RX ring read pointer (free running) 323 * @idx: Ring index from Linux's perspective 324 * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist 325 * @qcp_fl: Pointer to base of the QCP freelist queue 326 * @rxbufs: Array of transmitted FL/RX buffers 327 * @rxds: Virtual address of FL/RX ring in host memory 328 * @xdp_rxq: RX-ring info avail for XDP 329 * @dma: DMA address of the FL/RX ring 330 * @size: Size, in bytes, of the FL/RX ring (needed to free) 331 */ 332 struct nfp_net_rx_ring { 333 struct nfp_net_r_vector *r_vec; 334 335 u32 cnt; 336 u32 wr_p; 337 u32 rd_p; 338 339 u32 idx; 340 341 int fl_qcidx; 342 u8 __iomem *qcp_fl; 343 344 struct nfp_net_rx_buf *rxbufs; 345 struct nfp_net_rx_desc *rxds; 346 347 struct xdp_rxq_info xdp_rxq; 348 349 dma_addr_t dma; 350 size_t size; 351 } ____cacheline_aligned; 352 353 /** 354 * struct nfp_net_r_vector - Per ring interrupt vector configuration 355 * @nfp_net: Backpointer to nfp_net structure 356 * @napi: NAPI structure for this ring vec 357 * @tasklet: ctrl vNIC, tasklet for servicing the r_vec 358 * @queue: ctrl vNIC, send queue 359 * @lock: ctrl vNIC, r_vec lock protects @queue 360 * @tx_ring: Pointer to TX ring 361 * @rx_ring: Pointer to RX ring 362 * @xdp_ring: Pointer to an extra TX ring for XDP 363 * @irq_entry: MSI-X table entry (use for talking to the device) 364 * @event_ctr: Number of interrupt 365 * @rx_dim: Dynamic interrupt moderation structure for RX 366 * @tx_dim: Dynamic interrupt moderation structure for TX 367 * @rx_sync: Seqlock for atomic updates of RX stats 368 * @rx_pkts: Number of received packets 369 * @rx_bytes: Number of received bytes 370 * @rx_drops: Number of packets dropped on RX due to lack of resources 371 * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK 372 * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK 373 * @hw_csum_rx_complete: Counter of packets with CHECKSUM_COMPLETE reported 374 * @hw_csum_rx_error: Counter of packets with bad checksums 375 * @hw_tls_rx: Number of packets with TLS decrypted by hardware 376 * @tx_sync: Seqlock for atomic updates of TX stats 377 * @tx_pkts: Number of Transmitted packets 378 * @tx_bytes: Number of Transmitted bytes 379 * @hw_csum_tx: Counter of packets with TX checksum offload requested 380 * @hw_csum_tx_inner: Counter of inner TX checksum offload requests 381 * @tx_gather: Counter of packets with Gather DMA 382 * @tx_lso: Counter of LSO packets sent 383 * @hw_tls_tx: Counter of TLS packets sent with crypto offloaded to HW 384 * @tls_tx_fallback: Counter of TLS packets sent which had to be encrypted 385 * by the fallback path because packets came out of order 386 * @tls_tx_no_fallback: Counter of TLS packets not sent because the fallback 387 * path could not encrypt them 388 * @tx_errors: How many TX errors were encountered 389 * @tx_busy: How often was TX busy (no space)? 390 * @rx_replace_buf_alloc_fail: Counter of RX buffer allocation failures 391 * @irq_vector: Interrupt vector number (use for talking to the OS) 392 * @handler: Interrupt handler for this ring vector 393 * @name: Name of the interrupt vector 394 * @affinity_mask: SMP affinity mask for this vector 395 * 396 * This structure ties RX and TX rings to interrupt vectors and a NAPI 397 * context. This currently only supports one RX and TX ring per 398 * interrupt vector but might be extended in the future to allow 399 * association of multiple rings per vector. 400 */ 401 struct nfp_net_r_vector { 402 struct nfp_net *nfp_net; 403 union { 404 struct napi_struct napi; 405 struct { 406 struct tasklet_struct tasklet; 407 struct sk_buff_head queue; 408 spinlock_t lock; 409 }; 410 }; 411 412 struct nfp_net_tx_ring *tx_ring; 413 struct nfp_net_rx_ring *rx_ring; 414 415 u16 irq_entry; 416 417 u16 event_ctr; 418 struct dim rx_dim; 419 struct dim tx_dim; 420 421 struct u64_stats_sync rx_sync; 422 u64 rx_pkts; 423 u64 rx_bytes; 424 u64 rx_drops; 425 u64 hw_csum_rx_ok; 426 u64 hw_csum_rx_inner_ok; 427 u64 hw_csum_rx_complete; 428 u64 hw_tls_rx; 429 430 u64 hw_csum_rx_error; 431 u64 rx_replace_buf_alloc_fail; 432 433 struct nfp_net_tx_ring *xdp_ring; 434 435 struct u64_stats_sync tx_sync; 436 u64 tx_pkts; 437 u64 tx_bytes; 438 439 u64 ____cacheline_aligned_in_smp hw_csum_tx; 440 u64 hw_csum_tx_inner; 441 u64 tx_gather; 442 u64 tx_lso; 443 u64 hw_tls_tx; 444 445 u64 tls_tx_fallback; 446 u64 tls_tx_no_fallback; 447 u64 tx_errors; 448 u64 tx_busy; 449 450 /* Cold data follows */ 451 452 u32 irq_vector; 453 irq_handler_t handler; 454 char name[IFNAMSIZ + 8]; 455 cpumask_t affinity_mask; 456 } ____cacheline_aligned; 457 458 /* Firmware version as it is written in the 32bit value in the BAR */ 459 struct nfp_net_fw_version { 460 u8 minor; 461 u8 major; 462 u8 class; 463 u8 resv; 464 } __packed; 465 466 static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, 467 u8 resv, u8 class, u8 major, u8 minor) 468 { 469 return fw_ver->resv == resv && 470 fw_ver->class == class && 471 fw_ver->major == major && 472 fw_ver->minor == minor; 473 } 474 475 struct nfp_stat_pair { 476 u64 pkts; 477 u64 bytes; 478 }; 479 480 /** 481 * struct nfp_net_dp - NFP network device datapath data structure 482 * @dev: Backpointer to struct device 483 * @netdev: Backpointer to net_device structure 484 * @is_vf: Is the driver attached to a VF? 485 * @chained_metadata_format: Firemware will use new metadata format 486 * @ktls_tx: Is kTLS TX enabled? 487 * @rx_dma_dir: Mapping direction for RX buffers 488 * @rx_dma_off: Offset at which DMA packets (for XDP headroom) 489 * @rx_offset: Offset in the RX buffers where packet data starts 490 * @ctrl: Local copy of the control register/word. 491 * @fl_bufsz: Currently configured size of the freelist buffers 492 * @xdp_prog: Installed XDP program 493 * @tx_rings: Array of pre-allocated TX ring structures 494 * @rx_rings: Array of pre-allocated RX ring structures 495 * @ctrl_bar: Pointer to mapped control BAR 496 * 497 * @txd_cnt: Size of the TX ring in number of descriptors 498 * @rxd_cnt: Size of the RX ring in number of descriptors 499 * @num_r_vecs: Number of used ring vectors 500 * @num_tx_rings: Currently configured number of TX rings 501 * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) 502 * @num_rx_rings: Currently configured number of RX rings 503 * @mtu: Device MTU 504 */ 505 struct nfp_net_dp { 506 struct device *dev; 507 struct net_device *netdev; 508 509 u8 is_vf:1; 510 u8 chained_metadata_format:1; 511 u8 ktls_tx:1; 512 513 u8 rx_dma_dir; 514 u8 rx_offset; 515 516 u32 rx_dma_off; 517 518 u32 ctrl; 519 u32 fl_bufsz; 520 521 struct bpf_prog *xdp_prog; 522 523 struct nfp_net_tx_ring *tx_rings; 524 struct nfp_net_rx_ring *rx_rings; 525 526 u8 __iomem *ctrl_bar; 527 528 /* Cold data follows */ 529 530 unsigned int txd_cnt; 531 unsigned int rxd_cnt; 532 533 unsigned int num_r_vecs; 534 535 unsigned int num_tx_rings; 536 unsigned int num_stack_tx_rings; 537 unsigned int num_rx_rings; 538 539 unsigned int mtu; 540 }; 541 542 /** 543 * struct nfp_net - NFP network device structure 544 * @dp: Datapath structure 545 * @id: vNIC id within the PF (0 for VFs) 546 * @fw_ver: Firmware version 547 * @cap: Capabilities advertised by the Firmware 548 * @max_mtu: Maximum support MTU advertised by the Firmware 549 * @rss_hfunc: RSS selected hash function 550 * @rss_cfg: RSS configuration 551 * @rss_key: RSS secret key 552 * @rss_itbl: RSS indirection table 553 * @xdp: Information about the driver XDP program 554 * @xdp_hw: Information about the HW XDP program 555 * @max_r_vecs: Number of allocated interrupt vectors for RX/TX 556 * @max_tx_rings: Maximum number of TX rings supported by the Firmware 557 * @max_rx_rings: Maximum number of RX rings supported by the Firmware 558 * @stride_rx: Queue controller RX queue spacing 559 * @stride_tx: Queue controller TX queue spacing 560 * @r_vecs: Pre-allocated array of ring vectors 561 * @irq_entries: Pre-allocated array of MSI-X entries 562 * @lsc_handler: Handler for Link State Change interrupt 563 * @lsc_name: Name for Link State Change interrupt 564 * @exn_handler: Handler for Exception interrupt 565 * @exn_name: Name for Exception interrupt 566 * @shared_handler: Handler for shared interrupts 567 * @shared_name: Name for shared interrupt 568 * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active, 569 * @reconfig_sync_present and HW reconfiguration request 570 * regs/machinery from async requests (sync must take 571 * @bar_lock) 572 * @reconfig_posted: Pending reconfig bits coming from async sources 573 * @reconfig_timer_active: Timer for reading reconfiguration results is pending 574 * @reconfig_sync_present: Some thread is performing synchronous reconfig 575 * @reconfig_timer: Timer for async reading of reconfig results 576 * @reconfig_in_progress_update: Update FW is processing now (debug only) 577 * @bar_lock: vNIC config BAR access lock, protects: update, 578 * mailbox area, crypto TLV 579 * @link_up: Is the link up? 580 * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading 581 * @rx_coalesce_adapt_on: Is RX interrupt moderation adaptive? 582 * @tx_coalesce_adapt_on: Is TX interrupt moderation adaptive? 583 * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter 584 * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter 585 * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter 586 * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter 587 * @qcp_cfg: Pointer to QCP queue used for configuration notification 588 * @tx_bar: Pointer to mapped TX queues 589 * @rx_bar: Pointer to mapped FL/RX queues 590 * @tlv_caps: Parsed TLV capabilities 591 * @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections 592 * @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections 593 * @ktls_conn_id_gen: Trivial generator for kTLS connection ids (for TX) 594 * @ktls_no_space: Counter of firmware rejecting kTLS connection due to 595 * lack of space 596 * @ktls_rx_resync_req: Counter of TLS RX resync requested 597 * @ktls_rx_resync_ign: Counter of TLS RX resync requests ignored 598 * @ktls_rx_resync_sent: Counter of TLS RX resync completed 599 * @mbox_cmsg: Common Control Message via vNIC mailbox state 600 * @mbox_cmsg.queue: CCM mbox queue of pending messages 601 * @mbox_cmsg.wq: CCM mbox wait queue of waiting processes 602 * @mbox_cmsg.workq: CCM mbox work queue for @wait_work and @runq_work 603 * @mbox_cmsg.wait_work: CCM mbox posted msg reconfig wait work 604 * @mbox_cmsg.runq_work: CCM mbox posted msg queue runner work 605 * @mbox_cmsg.tag: CCM mbox message tag allocator 606 * @debugfs_dir: Device directory in debugfs 607 * @vnic_list: Entry on device vNIC list 608 * @pdev: Backpointer to PCI device 609 * @app: APP handle if available 610 * @vnic_no_name: For non-port PF vNIC make ndo_get_phys_port_name return 611 * -EOPNOTSUPP to keep backwards compatibility (set by app) 612 * @port: Pointer to nfp_port structure if vNIC is a port 613 * @app_priv: APP private data for this vNIC 614 */ 615 struct nfp_net { 616 struct nfp_net_dp dp; 617 618 struct nfp_net_fw_version fw_ver; 619 620 u32 id; 621 622 u32 cap; 623 u32 max_mtu; 624 625 u8 rss_hfunc; 626 u32 rss_cfg; 627 u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; 628 u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; 629 630 struct xdp_attachment_info xdp; 631 struct xdp_attachment_info xdp_hw; 632 633 unsigned int max_tx_rings; 634 unsigned int max_rx_rings; 635 636 int stride_tx; 637 int stride_rx; 638 639 unsigned int max_r_vecs; 640 struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS]; 641 struct msix_entry irq_entries[NFP_NET_MAX_IRQS]; 642 643 irq_handler_t lsc_handler; 644 char lsc_name[IFNAMSIZ + 8]; 645 646 irq_handler_t exn_handler; 647 char exn_name[IFNAMSIZ + 8]; 648 649 irq_handler_t shared_handler; 650 char shared_name[IFNAMSIZ + 8]; 651 652 bool link_up; 653 spinlock_t link_status_lock; 654 655 spinlock_t reconfig_lock; 656 u32 reconfig_posted; 657 bool reconfig_timer_active; 658 bool reconfig_sync_present; 659 struct timer_list reconfig_timer; 660 u32 reconfig_in_progress_update; 661 662 struct semaphore bar_lock; 663 664 bool rx_coalesce_adapt_on; 665 bool tx_coalesce_adapt_on; 666 u32 rx_coalesce_usecs; 667 u32 rx_coalesce_max_frames; 668 u32 tx_coalesce_usecs; 669 u32 tx_coalesce_max_frames; 670 671 u8 __iomem *qcp_cfg; 672 673 u8 __iomem *tx_bar; 674 u8 __iomem *rx_bar; 675 676 struct nfp_net_tlv_caps tlv_caps; 677 678 unsigned int ktls_tx_conn_cnt; 679 unsigned int ktls_rx_conn_cnt; 680 681 atomic64_t ktls_conn_id_gen; 682 683 atomic_t ktls_no_space; 684 atomic_t ktls_rx_resync_req; 685 atomic_t ktls_rx_resync_ign; 686 atomic_t ktls_rx_resync_sent; 687 688 struct { 689 struct sk_buff_head queue; 690 wait_queue_head_t wq; 691 struct workqueue_struct *workq; 692 struct work_struct wait_work; 693 struct work_struct runq_work; 694 u16 tag; 695 } mbox_cmsg; 696 697 struct dentry *debugfs_dir; 698 699 struct list_head vnic_list; 700 701 struct pci_dev *pdev; 702 struct nfp_app *app; 703 704 bool vnic_no_name; 705 706 struct nfp_port *port; 707 708 void *app_priv; 709 }; 710 711 /* Functions to read/write from/to a BAR 712 * Performs any endian conversion necessary. 713 */ 714 static inline u16 nn_readb(struct nfp_net *nn, int off) 715 { 716 return readb(nn->dp.ctrl_bar + off); 717 } 718 719 static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) 720 { 721 writeb(val, nn->dp.ctrl_bar + off); 722 } 723 724 static inline u16 nn_readw(struct nfp_net *nn, int off) 725 { 726 return readw(nn->dp.ctrl_bar + off); 727 } 728 729 static inline void nn_writew(struct nfp_net *nn, int off, u16 val) 730 { 731 writew(val, nn->dp.ctrl_bar + off); 732 } 733 734 static inline u32 nn_readl(struct nfp_net *nn, int off) 735 { 736 return readl(nn->dp.ctrl_bar + off); 737 } 738 739 static inline void nn_writel(struct nfp_net *nn, int off, u32 val) 740 { 741 writel(val, nn->dp.ctrl_bar + off); 742 } 743 744 static inline u64 nn_readq(struct nfp_net *nn, int off) 745 { 746 return readq(nn->dp.ctrl_bar + off); 747 } 748 749 static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) 750 { 751 writeq(val, nn->dp.ctrl_bar + off); 752 } 753 754 /* Flush posted PCI writes by reading something without side effects */ 755 static inline void nn_pci_flush(struct nfp_net *nn) 756 { 757 nn_readl(nn, NFP_NET_CFG_VERSION); 758 } 759 760 /* Queue Controller Peripheral access functions and definitions. 761 * 762 * Some of the BARs of the NFP are mapped to portions of the Queue 763 * Controller Peripheral (QCP) address space on the NFP. A QCP queue 764 * has a read and a write pointer (as well as a size and flags, 765 * indicating overflow etc). The QCP offers a number of different 766 * operation on queue pointers, but here we only offer function to 767 * either add to a pointer or to read the pointer value. 768 */ 769 #define NFP_QCP_QUEUE_ADDR_SZ 0x800 770 #define NFP_QCP_QUEUE_AREA_SZ 0x80000 771 #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) 772 #define NFP_QCP_QUEUE_ADD_RPTR 0x0000 773 #define NFP_QCP_QUEUE_ADD_WPTR 0x0004 774 #define NFP_QCP_QUEUE_STS_LO 0x0008 775 #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff 776 #define NFP_QCP_QUEUE_STS_HI 0x000c 777 #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff 778 779 /* The offset of a QCP queues in the PCIe Target */ 780 #define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) 781 782 /* nfp_qcp_ptr - Read or Write Pointer of a queue */ 783 enum nfp_qcp_ptr { 784 NFP_QCP_READ_PTR = 0, 785 NFP_QCP_WRITE_PTR 786 }; 787 788 /* There appear to be an *undocumented* upper limit on the value which 789 * one can add to a queue and that value is either 0x3f or 0x7f. We 790 * go with 0x3f as a conservative measure. 791 */ 792 #define NFP_QCP_MAX_ADD 0x3f 793 794 static inline void _nfp_qcp_ptr_add(u8 __iomem *q, 795 enum nfp_qcp_ptr ptr, u32 val) 796 { 797 u32 off; 798 799 if (ptr == NFP_QCP_READ_PTR) 800 off = NFP_QCP_QUEUE_ADD_RPTR; 801 else 802 off = NFP_QCP_QUEUE_ADD_WPTR; 803 804 while (val > NFP_QCP_MAX_ADD) { 805 writel(NFP_QCP_MAX_ADD, q + off); 806 val -= NFP_QCP_MAX_ADD; 807 } 808 809 writel(val, q + off); 810 } 811 812 /** 813 * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue 814 * 815 * @q: Base address for queue structure 816 * @val: Value to add to the queue pointer 817 * 818 * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. 819 */ 820 static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) 821 { 822 _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); 823 } 824 825 /** 826 * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue 827 * 828 * @q: Base address for queue structure 829 * @val: Value to add to the queue pointer 830 * 831 * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. 832 */ 833 static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) 834 { 835 _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); 836 } 837 838 static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) 839 { 840 u32 off; 841 u32 val; 842 843 if (ptr == NFP_QCP_READ_PTR) 844 off = NFP_QCP_QUEUE_STS_LO; 845 else 846 off = NFP_QCP_QUEUE_STS_HI; 847 848 val = readl(q + off); 849 850 if (ptr == NFP_QCP_READ_PTR) 851 return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; 852 else 853 return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; 854 } 855 856 /** 857 * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue 858 * @q: Base address for queue structure 859 * 860 * Return: Value read. 861 */ 862 static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) 863 { 864 return _nfp_qcp_read(q, NFP_QCP_READ_PTR); 865 } 866 867 /** 868 * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue 869 * @q: Base address for queue structure 870 * 871 * Return: Value read. 872 */ 873 static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) 874 { 875 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); 876 } 877 878 static inline bool nfp_net_is_data_vnic(struct nfp_net *nn) 879 { 880 WARN_ON_ONCE(!nn->dp.netdev && nn->port); 881 return !!nn->dp.netdev; 882 } 883 884 static inline bool nfp_net_running(struct nfp_net *nn) 885 { 886 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE; 887 } 888 889 static inline const char *nfp_net_name(struct nfp_net *nn) 890 { 891 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl"; 892 } 893 894 static inline void nfp_ctrl_lock(struct nfp_net *nn) 895 __acquires(&nn->r_vecs[0].lock) 896 { 897 spin_lock_bh(&nn->r_vecs[0].lock); 898 } 899 900 static inline void nfp_ctrl_unlock(struct nfp_net *nn) 901 __releases(&nn->r_vecs[0].lock) 902 { 903 spin_unlock_bh(&nn->r_vecs[0].lock); 904 } 905 906 static inline void nn_ctrl_bar_lock(struct nfp_net *nn) 907 { 908 down(&nn->bar_lock); 909 } 910 911 static inline bool nn_ctrl_bar_trylock(struct nfp_net *nn) 912 { 913 return !down_trylock(&nn->bar_lock); 914 } 915 916 static inline void nn_ctrl_bar_unlock(struct nfp_net *nn) 917 { 918 up(&nn->bar_lock); 919 } 920 921 /* Globals */ 922 extern const char nfp_driver_version[]; 923 924 extern const struct net_device_ops nfp_net_netdev_ops; 925 926 static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev) 927 { 928 return netdev->netdev_ops == &nfp_net_netdev_ops; 929 } 930 931 static inline int nfp_net_coalesce_para_check(u32 usecs, u32 pkts) 932 { 933 if ((usecs >= ((1 << 16) - 1)) || (pkts >= ((1 << 16) - 1))) 934 return -EINVAL; 935 936 return 0; 937 } 938 939 /* Prototypes */ 940 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, 941 void __iomem *ctrl_bar); 942 943 struct nfp_net * 944 nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev, 945 unsigned int max_tx_rings, unsigned int max_rx_rings); 946 void nfp_net_free(struct nfp_net *nn); 947 948 int nfp_net_init(struct nfp_net *nn); 949 void nfp_net_clean(struct nfp_net *nn); 950 951 int nfp_ctrl_open(struct nfp_net *nn); 952 void nfp_ctrl_close(struct nfp_net *nn); 953 954 void nfp_net_set_ethtool_ops(struct net_device *netdev); 955 void nfp_net_info(struct nfp_net *nn); 956 int __nfp_net_reconfig(struct nfp_net *nn, u32 update); 957 int nfp_net_reconfig(struct nfp_net *nn, u32 update); 958 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn); 959 void nfp_net_rss_write_itbl(struct nfp_net *nn); 960 void nfp_net_rss_write_key(struct nfp_net *nn); 961 void nfp_net_coalesce_write_cfg(struct nfp_net *nn); 962 int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size); 963 int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd); 964 int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd); 965 void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 update); 966 int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn); 967 968 unsigned int 969 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, 970 unsigned int min_irqs, unsigned int want_irqs); 971 void nfp_net_irqs_disable(struct pci_dev *pdev); 972 void 973 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, 974 unsigned int n); 975 976 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn); 977 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new, 978 struct netlink_ext_ack *extack); 979 980 #ifdef CONFIG_NFP_DEBUG 981 void nfp_net_debugfs_create(void); 982 void nfp_net_debugfs_destroy(void); 983 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev); 984 void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir); 985 void nfp_net_debugfs_dir_clean(struct dentry **dir); 986 #else 987 static inline void nfp_net_debugfs_create(void) 988 { 989 } 990 991 static inline void nfp_net_debugfs_destroy(void) 992 { 993 } 994 995 static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) 996 { 997 return NULL; 998 } 999 1000 static inline void 1001 nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir) 1002 { 1003 } 1004 1005 static inline void nfp_net_debugfs_dir_clean(struct dentry **dir) 1006 { 1007 } 1008 #endif /* CONFIG_NFP_DEBUG */ 1009 1010 #endif /* _NFP_NET_H_ */ 1011