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