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/io-64-nonatomic-hi-lo.h> 21 #include <linux/semaphore.h> 22 #include <linux/workqueue.h> 23 #include <net/xdp.h> 24 25 #include "nfp_net_ctrl.h" 26 27 #define nn_pr(nn, lvl, fmt, args...) \ 28 ({ \ 29 struct nfp_net *__nn = (nn); \ 30 \ 31 if (__nn->dp.netdev) \ 32 netdev_printk(lvl, __nn->dp.netdev, fmt, ## args); \ 33 else \ 34 dev_printk(lvl, __nn->dp.dev, "ctrl: " fmt, ## args); \ 35 }) 36 37 #define nn_err(nn, fmt, args...) nn_pr(nn, KERN_ERR, fmt, ## args) 38 #define nn_warn(nn, fmt, args...) nn_pr(nn, KERN_WARNING, fmt, ## args) 39 #define nn_info(nn, fmt, args...) nn_pr(nn, KERN_INFO, fmt, ## args) 40 #define nn_dbg(nn, fmt, args...) nn_pr(nn, KERN_DEBUG, fmt, ## args) 41 42 #define nn_dp_warn(dp, fmt, args...) \ 43 ({ \ 44 struct nfp_net_dp *__dp = (dp); \ 45 \ 46 if (unlikely(net_ratelimit())) { \ 47 if (__dp->netdev) \ 48 netdev_warn(__dp->netdev, fmt, ## args); \ 49 else \ 50 dev_warn(__dp->dev, fmt, ## args); \ 51 } \ 52 }) 53 54 /* Max time to wait for NFP to respond on updates (in seconds) */ 55 #define NFP_NET_POLL_TIMEOUT 5 56 57 /* Interval for reading offloaded filter stats */ 58 #define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100) 59 60 /* Bar allocation */ 61 #define NFP_NET_CTRL_BAR 0 62 #define NFP_NET_Q0_BAR 2 63 #define NFP_NET_Q1_BAR 4 /* OBSOLETE */ 64 65 /* Max bits in DMA address */ 66 #define NFP_NET_MAX_DMA_BITS 40 67 68 /* Default size for MTU and freelist buffer sizes */ 69 #define NFP_NET_DEFAULT_MTU 1500 70 71 /* Maximum number of bytes prepended to a packet */ 72 #define NFP_NET_MAX_PREPEND 64 73 74 /* Interrupt definitions */ 75 #define NFP_NET_NON_Q_VECTORS 2 76 #define NFP_NET_IRQ_LSC_IDX 0 77 #define NFP_NET_IRQ_EXN_IDX 1 78 #define NFP_NET_MIN_VNIC_IRQS (NFP_NET_NON_Q_VECTORS + 1) 79 80 /* Queue/Ring definitions */ 81 #define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */ 82 #define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */ 83 #define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \ 84 NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS) 85 #define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS) 86 87 #define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */ 88 #define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */ 89 #define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */ 90 #define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */ 91 92 #define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */ 93 #define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */ 94 95 #define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */ 96 #define NFP_NET_XDP_MAX_COMPLETE 2048 /* XDP bufs to reclaim in NAPI poll */ 97 98 /* Offload definitions */ 99 #define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) 100 101 #define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN) 102 #define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \ 103 SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) 104 105 /* Forward declarations */ 106 struct nfp_cpp; 107 struct nfp_eth_table_port; 108 struct nfp_net; 109 struct nfp_net_r_vector; 110 struct nfp_port; 111 112 /* Convenience macro for wrapping descriptor index on ring size */ 113 #define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1)) 114 115 /* Convenience macro for writing dma address into RX/TX descriptors */ 116 #define nfp_desc_set_dma_addr(desc, dma_addr) \ 117 do { \ 118 __typeof(desc) __d = (desc); \ 119 dma_addr_t __addr = (dma_addr); \ 120 \ 121 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ 122 __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ 123 } while (0) 124 125 /* TX descriptor format */ 126 127 #define PCIE_DESC_TX_EOP BIT(7) 128 #define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) 129 #define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0) 130 131 /* Flags in the host TX descriptor */ 132 #define PCIE_DESC_TX_CSUM BIT(7) 133 #define PCIE_DESC_TX_IP4_CSUM BIT(6) 134 #define PCIE_DESC_TX_TCP_CSUM BIT(5) 135 #define PCIE_DESC_TX_UDP_CSUM BIT(4) 136 #define PCIE_DESC_TX_VLAN BIT(3) 137 #define PCIE_DESC_TX_LSO BIT(2) 138 #define PCIE_DESC_TX_ENCAP BIT(1) 139 #define PCIE_DESC_TX_O_IP4_CSUM BIT(0) 140 141 struct nfp_net_tx_desc { 142 union { 143 struct { 144 u8 dma_addr_hi; /* High bits of host buf address */ 145 __le16 dma_len; /* Length to DMA for this desc */ 146 u8 offset_eop; /* Offset in buf where pkt starts + 147 * highest bit is eop flag. 148 */ 149 __le32 dma_addr_lo; /* Low 32bit of host buf addr */ 150 151 __le16 mss; /* MSS to be used for LSO */ 152 u8 lso_hdrlen; /* LSO, TCP payload offset */ 153 u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ 154 union { 155 struct { 156 u8 l3_offset; /* L3 header offset */ 157 u8 l4_offset; /* L4 header offset */ 158 }; 159 __le16 vlan; /* VLAN tag to add if indicated */ 160 }; 161 __le16 data_len; /* Length of frame + meta data */ 162 } __packed; 163 __le32 vals[4]; 164 __le64 vals8[2]; 165 }; 166 }; 167 168 /** 169 * struct nfp_net_tx_buf - software TX buffer descriptor 170 * @skb: normal ring, sk_buff associated with this buffer 171 * @frag: XDP ring, page frag associated with this buffer 172 * @dma_addr: DMA mapping address of the buffer 173 * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) 174 * @pkt_cnt: Number of packets to be produced out of the skb associated 175 * with this buffer (valid only on the head's buffer). 176 * Will be 1 for all non-TSO packets. 177 * @real_len: Number of bytes which to be produced out of the skb (valid only 178 * on the head's buffer). Equal to skb->len for non-TSO packets. 179 */ 180 struct nfp_net_tx_buf { 181 union { 182 struct sk_buff *skb; 183 void *frag; 184 }; 185 dma_addr_t dma_addr; 186 short int fidx; 187 u16 pkt_cnt; 188 u32 real_len; 189 }; 190 191 /** 192 * struct nfp_net_tx_ring - TX ring structure 193 * @r_vec: Back pointer to ring vector structure 194 * @idx: Ring index from Linux's perspective 195 * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue 196 * @qcp_q: Pointer to base of the QCP TX queue 197 * @cnt: Size of the queue in number of descriptors 198 * @wr_p: TX ring write pointer (free running) 199 * @rd_p: TX ring read pointer (free running) 200 * @qcp_rd_p: Local copy of QCP TX queue read pointer 201 * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer 202 * (used for .xmit_more delayed kick) 203 * @txbufs: Array of transmitted TX buffers, to free on transmit 204 * @txds: Virtual address of TX ring in host memory 205 * @dma: DMA address of the TX ring 206 * @size: Size, in bytes, of the TX ring (needed to free) 207 * @is_xdp: Is this a XDP TX ring? 208 */ 209 struct nfp_net_tx_ring { 210 struct nfp_net_r_vector *r_vec; 211 212 u32 idx; 213 int qcidx; 214 u8 __iomem *qcp_q; 215 216 u32 cnt; 217 u32 wr_p; 218 u32 rd_p; 219 u32 qcp_rd_p; 220 221 u32 wr_ptr_add; 222 223 struct nfp_net_tx_buf *txbufs; 224 struct nfp_net_tx_desc *txds; 225 226 dma_addr_t dma; 227 size_t size; 228 bool is_xdp; 229 } ____cacheline_aligned; 230 231 /* RX and freelist descriptor format */ 232 233 #define PCIE_DESC_RX_DD BIT(7) 234 #define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) 235 236 /* Flags in the RX descriptor */ 237 #define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) 238 #define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) 239 #define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) 240 #define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) 241 #define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) 242 #define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) 243 #define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) 244 #define PCIE_DESC_RX_DECRYPTED cpu_to_le16(BIT(8)) 245 #define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) 246 #define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) 247 #define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) 248 #define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) 249 #define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) 250 #define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) 251 #define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) 252 #define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) 253 254 #define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ 255 PCIE_DESC_RX_TCP_CSUM | \ 256 PCIE_DESC_RX_UDP_CSUM | \ 257 PCIE_DESC_RX_I_IP4_CSUM | \ 258 PCIE_DESC_RX_I_TCP_CSUM | \ 259 PCIE_DESC_RX_I_UDP_CSUM) 260 #define PCIE_DESC_RX_CSUM_OK_SHIFT 1 261 #define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) 262 #define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ 263 PCIE_DESC_RX_CSUM_OK_SHIFT) 264 265 struct nfp_net_rx_desc { 266 union { 267 struct { 268 u8 dma_addr_hi; /* High bits of the buf address */ 269 __le16 reserved; /* Must be zero */ 270 u8 meta_len_dd; /* Must be zero */ 271 272 __le32 dma_addr_lo; /* Low bits of the buffer address */ 273 } __packed fld; 274 275 struct { 276 __le16 data_len; /* Length of the frame + meta data */ 277 u8 reserved; 278 u8 meta_len_dd; /* Length of meta data prepended + 279 * descriptor done flag. 280 */ 281 282 __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ 283 __le16 vlan; /* VLAN if stripped */ 284 } __packed rxd; 285 286 __le32 vals[2]; 287 }; 288 }; 289 290 #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0) 291 292 struct nfp_meta_parsed { 293 u8 hash_type; 294 u8 csum_type; 295 u32 hash; 296 u32 mark; 297 u32 portid; 298 __wsum csum; 299 }; 300 301 struct nfp_net_rx_hash { 302 __be32 hash_type; 303 __be32 hash; 304 }; 305 306 /** 307 * struct nfp_net_rx_buf - software RX buffer descriptor 308 * @frag: page fragment buffer 309 * @dma_addr: DMA mapping address of the buffer 310 */ 311 struct nfp_net_rx_buf { 312 void *frag; 313 dma_addr_t dma_addr; 314 }; 315 316 /** 317 * struct nfp_net_rx_ring - RX ring structure 318 * @r_vec: Back pointer to ring vector structure 319 * @cnt: Size of the queue in number of descriptors 320 * @wr_p: FL/RX ring write pointer (free running) 321 * @rd_p: FL/RX ring read pointer (free running) 322 * @idx: Ring index from Linux's perspective 323 * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist 324 * @qcp_fl: Pointer to base of the QCP freelist queue 325 * @rxbufs: Array of transmitted FL/RX buffers 326 * @rxds: Virtual address of FL/RX ring in host memory 327 * @xdp_rxq: RX-ring info avail for XDP 328 * @dma: DMA address of the FL/RX ring 329 * @size: Size, in bytes, of the FL/RX ring (needed to free) 330 */ 331 struct nfp_net_rx_ring { 332 struct nfp_net_r_vector *r_vec; 333 334 u32 cnt; 335 u32 wr_p; 336 u32 rd_p; 337 338 u32 idx; 339 340 int fl_qcidx; 341 u8 __iomem *qcp_fl; 342 343 struct nfp_net_rx_buf *rxbufs; 344 struct nfp_net_rx_desc *rxds; 345 346 struct xdp_rxq_info xdp_rxq; 347 348 dma_addr_t dma; 349 size_t size; 350 } ____cacheline_aligned; 351 352 /** 353 * struct nfp_net_r_vector - Per ring interrupt vector configuration 354 * @nfp_net: Backpointer to nfp_net structure 355 * @napi: NAPI structure for this ring vec 356 * @tasklet: ctrl vNIC, tasklet for servicing the r_vec 357 * @queue: ctrl vNIC, send queue 358 * @lock: ctrl vNIC, r_vec lock protects @queue 359 * @tx_ring: Pointer to TX ring 360 * @rx_ring: Pointer to RX ring 361 * @xdp_ring: Pointer to an extra TX ring for XDP 362 * @irq_entry: MSI-X table entry (use for talking to the device) 363 * @rx_sync: Seqlock for atomic updates of RX stats 364 * @rx_pkts: Number of received packets 365 * @rx_bytes: Number of received bytes 366 * @rx_drops: Number of packets dropped on RX due to lack of resources 367 * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK 368 * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK 369 * @hw_csum_rx_complete: Counter of packets with CHECKSUM_COMPLETE reported 370 * @hw_csum_rx_error: Counter of packets with bad checksums 371 * @hw_tls_rx: Number of packets with TLS decrypted by hardware 372 * @tx_sync: Seqlock for atomic updates of TX stats 373 * @tx_pkts: Number of Transmitted packets 374 * @tx_bytes: Number of Transmitted bytes 375 * @hw_csum_tx: Counter of packets with TX checksum offload requested 376 * @hw_csum_tx_inner: Counter of inner TX checksum offload requests 377 * @tx_gather: Counter of packets with Gather DMA 378 * @tx_lso: Counter of LSO packets sent 379 * @hw_tls_tx: Counter of TLS packets sent with crypto offloaded to HW 380 * @tls_tx_fallback: Counter of TLS packets sent which had to be encrypted 381 * by the fallback path because packets came out of order 382 * @tls_tx_no_fallback: Counter of TLS packets not sent because the fallback 383 * path could not encrypt them 384 * @tx_errors: How many TX errors were encountered 385 * @tx_busy: How often was TX busy (no space)? 386 * @rx_replace_buf_alloc_fail: Counter of RX buffer allocation failures 387 * @irq_vector: Interrupt vector number (use for talking to the OS) 388 * @handler: Interrupt handler for this ring vector 389 * @name: Name of the interrupt vector 390 * @affinity_mask: SMP affinity mask for this vector 391 * 392 * This structure ties RX and TX rings to interrupt vectors and a NAPI 393 * context. This currently only supports one RX and TX ring per 394 * interrupt vector but might be extended in the future to allow 395 * association of multiple rings per vector. 396 */ 397 struct nfp_net_r_vector { 398 struct nfp_net *nfp_net; 399 union { 400 struct napi_struct napi; 401 struct { 402 struct tasklet_struct tasklet; 403 struct sk_buff_head queue; 404 spinlock_t lock; 405 }; 406 }; 407 408 struct nfp_net_tx_ring *tx_ring; 409 struct nfp_net_rx_ring *rx_ring; 410 411 u16 irq_entry; 412 413 struct u64_stats_sync rx_sync; 414 u64 rx_pkts; 415 u64 rx_bytes; 416 u64 rx_drops; 417 u64 hw_csum_rx_ok; 418 u64 hw_csum_rx_inner_ok; 419 u64 hw_csum_rx_complete; 420 u64 hw_tls_rx; 421 422 u64 hw_csum_rx_error; 423 u64 rx_replace_buf_alloc_fail; 424 425 struct nfp_net_tx_ring *xdp_ring; 426 427 struct u64_stats_sync tx_sync; 428 u64 tx_pkts; 429 u64 tx_bytes; 430 431 u64 ____cacheline_aligned_in_smp hw_csum_tx; 432 u64 hw_csum_tx_inner; 433 u64 tx_gather; 434 u64 tx_lso; 435 u64 hw_tls_tx; 436 437 u64 tls_tx_fallback; 438 u64 tls_tx_no_fallback; 439 u64 tx_errors; 440 u64 tx_busy; 441 442 /* Cold data follows */ 443 444 u32 irq_vector; 445 irq_handler_t handler; 446 char name[IFNAMSIZ + 8]; 447 cpumask_t affinity_mask; 448 } ____cacheline_aligned; 449 450 /* Firmware version as it is written in the 32bit value in the BAR */ 451 struct nfp_net_fw_version { 452 u8 minor; 453 u8 major; 454 u8 class; 455 u8 resv; 456 } __packed; 457 458 static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, 459 u8 resv, u8 class, u8 major, u8 minor) 460 { 461 return fw_ver->resv == resv && 462 fw_ver->class == class && 463 fw_ver->major == major && 464 fw_ver->minor == minor; 465 } 466 467 struct nfp_stat_pair { 468 u64 pkts; 469 u64 bytes; 470 }; 471 472 /** 473 * struct nfp_net_dp - NFP network device datapath data structure 474 * @dev: Backpointer to struct device 475 * @netdev: Backpointer to net_device structure 476 * @is_vf: Is the driver attached to a VF? 477 * @chained_metadata_format: Firemware will use new metadata format 478 * @ktls_tx: Is kTLS TX enabled? 479 * @rx_dma_dir: Mapping direction for RX buffers 480 * @rx_dma_off: Offset at which DMA packets (for XDP headroom) 481 * @rx_offset: Offset in the RX buffers where packet data starts 482 * @ctrl: Local copy of the control register/word. 483 * @fl_bufsz: Currently configured size of the freelist buffers 484 * @xdp_prog: Installed XDP program 485 * @tx_rings: Array of pre-allocated TX ring structures 486 * @rx_rings: Array of pre-allocated RX ring structures 487 * @ctrl_bar: Pointer to mapped control BAR 488 * 489 * @txd_cnt: Size of the TX ring in number of descriptors 490 * @rxd_cnt: Size of the RX ring in number of descriptors 491 * @num_r_vecs: Number of used ring vectors 492 * @num_tx_rings: Currently configured number of TX rings 493 * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) 494 * @num_rx_rings: Currently configured number of RX rings 495 * @mtu: Device MTU 496 */ 497 struct nfp_net_dp { 498 struct device *dev; 499 struct net_device *netdev; 500 501 u8 is_vf:1; 502 u8 chained_metadata_format:1; 503 u8 ktls_tx:1; 504 505 u8 rx_dma_dir; 506 u8 rx_offset; 507 508 u32 rx_dma_off; 509 510 u32 ctrl; 511 u32 fl_bufsz; 512 513 struct bpf_prog *xdp_prog; 514 515 struct nfp_net_tx_ring *tx_rings; 516 struct nfp_net_rx_ring *rx_rings; 517 518 u8 __iomem *ctrl_bar; 519 520 /* Cold data follows */ 521 522 unsigned int txd_cnt; 523 unsigned int rxd_cnt; 524 525 unsigned int num_r_vecs; 526 527 unsigned int num_tx_rings; 528 unsigned int num_stack_tx_rings; 529 unsigned int num_rx_rings; 530 531 unsigned int mtu; 532 }; 533 534 /** 535 * struct nfp_net - NFP network device structure 536 * @dp: Datapath structure 537 * @id: vNIC id within the PF (0 for VFs) 538 * @fw_ver: Firmware version 539 * @cap: Capabilities advertised by the Firmware 540 * @max_mtu: Maximum support MTU advertised by the Firmware 541 * @rss_hfunc: RSS selected hash function 542 * @rss_cfg: RSS configuration 543 * @rss_key: RSS secret key 544 * @rss_itbl: RSS indirection table 545 * @xdp: Information about the driver XDP program 546 * @xdp_hw: Information about the HW XDP program 547 * @max_r_vecs: Number of allocated interrupt vectors for RX/TX 548 * @max_tx_rings: Maximum number of TX rings supported by the Firmware 549 * @max_rx_rings: Maximum number of RX rings supported by the Firmware 550 * @stride_rx: Queue controller RX queue spacing 551 * @stride_tx: Queue controller TX queue spacing 552 * @r_vecs: Pre-allocated array of ring vectors 553 * @irq_entries: Pre-allocated array of MSI-X entries 554 * @lsc_handler: Handler for Link State Change interrupt 555 * @lsc_name: Name for Link State Change interrupt 556 * @exn_handler: Handler for Exception interrupt 557 * @exn_name: Name for Exception interrupt 558 * @shared_handler: Handler for shared interrupts 559 * @shared_name: Name for shared interrupt 560 * @me_freq_mhz: ME clock_freq (MHz) 561 * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active, 562 * @reconfig_sync_present and HW reconfiguration request 563 * regs/machinery from async requests (sync must take 564 * @bar_lock) 565 * @reconfig_posted: Pending reconfig bits coming from async sources 566 * @reconfig_timer_active: Timer for reading reconfiguration results is pending 567 * @reconfig_sync_present: Some thread is performing synchronous reconfig 568 * @reconfig_timer: Timer for async reading of reconfig results 569 * @reconfig_in_progress_update: Update FW is processing now (debug only) 570 * @bar_lock: vNIC config BAR access lock, protects: update, 571 * mailbox area, crypto TLV 572 * @link_up: Is the link up? 573 * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading 574 * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter 575 * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter 576 * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter 577 * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter 578 * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW 579 * @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts 580 * @qcp_cfg: Pointer to QCP queue used for configuration notification 581 * @tx_bar: Pointer to mapped TX queues 582 * @rx_bar: Pointer to mapped FL/RX queues 583 * @tlv_caps: Parsed TLV capabilities 584 * @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections 585 * @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections 586 * @ktls_conn_id_gen: Trivial generator for kTLS connection ids (for TX) 587 * @ktls_no_space: Counter of firmware rejecting kTLS connection due to 588 * lack of space 589 * @mbox_cmsg: Common Control Message via vNIC mailbox state 590 * @mbox_cmsg.queue: CCM mbox queue of pending messages 591 * @mbox_cmsg.wq: CCM mbox wait queue of waiting processes 592 * @mbox_cmsg.workq: CCM mbox work queue for @wait_work and @runq_work 593 * @mbox_cmsg.wait_work: CCM mbox posted msg reconfig wait work 594 * @mbox_cmsg.runq_work: CCM mbox posted msg queue runner work 595 * @mbox_cmsg.tag: CCM mbox message tag allocator 596 * @debugfs_dir: Device directory in debugfs 597 * @vnic_list: Entry on device vNIC list 598 * @pdev: Backpointer to PCI device 599 * @app: APP handle if available 600 * @vnic_no_name: For non-port PF vNIC make ndo_get_phys_port_name return 601 * -EOPNOTSUPP to keep backwards compatibility (set by app) 602 * @port: Pointer to nfp_port structure if vNIC is a port 603 * @app_priv: APP private data for this vNIC 604 */ 605 struct nfp_net { 606 struct nfp_net_dp dp; 607 608 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 u32 me_freq_mhz; 643 644 bool link_up; 645 spinlock_t link_status_lock; 646 647 spinlock_t reconfig_lock; 648 u32 reconfig_posted; 649 bool reconfig_timer_active; 650 bool reconfig_sync_present; 651 struct timer_list reconfig_timer; 652 u32 reconfig_in_progress_update; 653 654 struct semaphore bar_lock; 655 656 u32 rx_coalesce_usecs; 657 u32 rx_coalesce_max_frames; 658 u32 tx_coalesce_usecs; 659 u32 tx_coalesce_max_frames; 660 661 __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS]; 662 u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS]; 663 664 u8 __iomem *qcp_cfg; 665 666 u8 __iomem *tx_bar; 667 u8 __iomem *rx_bar; 668 669 struct nfp_net_tlv_caps tlv_caps; 670 671 unsigned int ktls_tx_conn_cnt; 672 unsigned int ktls_rx_conn_cnt; 673 674 atomic64_t ktls_conn_id_gen; 675 676 atomic_t ktls_no_space; 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_AREA_SZ 0x80000 761 #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) 762 #define NFP_QCP_QUEUE_ADD_RPTR 0x0000 763 #define NFP_QCP_QUEUE_ADD_WPTR 0x0004 764 #define NFP_QCP_QUEUE_STS_LO 0x0008 765 #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff 766 #define NFP_QCP_QUEUE_STS_HI 0x000c 767 #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff 768 769 /* The offset of a QCP queues in the PCIe Target */ 770 #define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) 771 772 /* nfp_qcp_ptr - Read or Write Pointer of a queue */ 773 enum nfp_qcp_ptr { 774 NFP_QCP_READ_PTR = 0, 775 NFP_QCP_WRITE_PTR 776 }; 777 778 /* There appear to be an *undocumented* upper limit on the value which 779 * one can add to a queue and that value is either 0x3f or 0x7f. We 780 * go with 0x3f as a conservative measure. 781 */ 782 #define NFP_QCP_MAX_ADD 0x3f 783 784 static inline void _nfp_qcp_ptr_add(u8 __iomem *q, 785 enum nfp_qcp_ptr ptr, u32 val) 786 { 787 u32 off; 788 789 if (ptr == NFP_QCP_READ_PTR) 790 off = NFP_QCP_QUEUE_ADD_RPTR; 791 else 792 off = NFP_QCP_QUEUE_ADD_WPTR; 793 794 while (val > NFP_QCP_MAX_ADD) { 795 writel(NFP_QCP_MAX_ADD, q + off); 796 val -= NFP_QCP_MAX_ADD; 797 } 798 799 writel(val, q + off); 800 } 801 802 /** 803 * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue 804 * 805 * @q: Base address for queue structure 806 * @val: Value to add to the queue pointer 807 * 808 * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. 809 */ 810 static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) 811 { 812 _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); 813 } 814 815 /** 816 * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue 817 * 818 * @q: Base address for queue structure 819 * @val: Value to add to the queue pointer 820 * 821 * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. 822 */ 823 static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) 824 { 825 _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); 826 } 827 828 static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) 829 { 830 u32 off; 831 u32 val; 832 833 if (ptr == NFP_QCP_READ_PTR) 834 off = NFP_QCP_QUEUE_STS_LO; 835 else 836 off = NFP_QCP_QUEUE_STS_HI; 837 838 val = readl(q + off); 839 840 if (ptr == NFP_QCP_READ_PTR) 841 return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; 842 else 843 return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; 844 } 845 846 /** 847 * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue 848 * @q: Base address for queue structure 849 * 850 * Return: Value read. 851 */ 852 static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) 853 { 854 return _nfp_qcp_read(q, NFP_QCP_READ_PTR); 855 } 856 857 /** 858 * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue 859 * @q: Base address for queue structure 860 * 861 * Return: Value read. 862 */ 863 static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) 864 { 865 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); 866 } 867 868 static inline bool nfp_net_is_data_vnic(struct nfp_net *nn) 869 { 870 WARN_ON_ONCE(!nn->dp.netdev && nn->port); 871 return !!nn->dp.netdev; 872 } 873 874 static inline bool nfp_net_running(struct nfp_net *nn) 875 { 876 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE; 877 } 878 879 static inline const char *nfp_net_name(struct nfp_net *nn) 880 { 881 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl"; 882 } 883 884 static inline void nfp_ctrl_lock(struct nfp_net *nn) 885 __acquires(&nn->r_vecs[0].lock) 886 { 887 spin_lock_bh(&nn->r_vecs[0].lock); 888 } 889 890 static inline void nfp_ctrl_unlock(struct nfp_net *nn) 891 __releases(&nn->r_vecs[0].lock) 892 { 893 spin_unlock_bh(&nn->r_vecs[0].lock); 894 } 895 896 static inline void nn_ctrl_bar_lock(struct nfp_net *nn) 897 { 898 down(&nn->bar_lock); 899 } 900 901 static inline bool nn_ctrl_bar_trylock(struct nfp_net *nn) 902 { 903 return !down_trylock(&nn->bar_lock); 904 } 905 906 static inline void nn_ctrl_bar_unlock(struct nfp_net *nn) 907 { 908 up(&nn->bar_lock); 909 } 910 911 /* Globals */ 912 extern const char nfp_driver_version[]; 913 914 extern const struct net_device_ops nfp_net_netdev_ops; 915 916 static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev) 917 { 918 return netdev->netdev_ops == &nfp_net_netdev_ops; 919 } 920 921 /* Prototypes */ 922 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, 923 void __iomem *ctrl_bar); 924 925 struct nfp_net * 926 nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev, 927 unsigned int max_tx_rings, unsigned int max_rx_rings); 928 void nfp_net_free(struct nfp_net *nn); 929 930 int nfp_net_init(struct nfp_net *nn); 931 void nfp_net_clean(struct nfp_net *nn); 932 933 int nfp_ctrl_open(struct nfp_net *nn); 934 void nfp_ctrl_close(struct nfp_net *nn); 935 936 void nfp_net_set_ethtool_ops(struct net_device *netdev); 937 void nfp_net_info(struct nfp_net *nn); 938 int __nfp_net_reconfig(struct nfp_net *nn, u32 update); 939 int nfp_net_reconfig(struct nfp_net *nn, u32 update); 940 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn); 941 void nfp_net_rss_write_itbl(struct nfp_net *nn); 942 void nfp_net_rss_write_key(struct nfp_net *nn); 943 void nfp_net_coalesce_write_cfg(struct nfp_net *nn); 944 int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size); 945 int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd); 946 int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd); 947 void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 update); 948 int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn); 949 950 unsigned int 951 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, 952 unsigned int min_irqs, unsigned int want_irqs); 953 void nfp_net_irqs_disable(struct pci_dev *pdev); 954 void 955 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, 956 unsigned int n); 957 958 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn); 959 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new, 960 struct netlink_ext_ack *extack); 961 962 #ifdef CONFIG_NFP_DEBUG 963 void nfp_net_debugfs_create(void); 964 void nfp_net_debugfs_destroy(void); 965 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev); 966 void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir); 967 void nfp_net_debugfs_dir_clean(struct dentry **dir); 968 #else 969 static inline void nfp_net_debugfs_create(void) 970 { 971 } 972 973 static inline void nfp_net_debugfs_destroy(void) 974 { 975 } 976 977 static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) 978 { 979 return NULL; 980 } 981 982 static inline void 983 nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir) 984 { 985 } 986 987 static inline void nfp_net_debugfs_dir_clean(struct dentry **dir) 988 { 989 } 990 #endif /* CONFIG_NFP_DEBUG */ 991 992 #endif /* _NFP_NET_H_ */ 993