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