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