1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * Copyright 2005-2006 Fen Systems Ltd. 5 * Copyright 2005-2013 Solarflare Communications Inc. 6 */ 7 8 /* Common definitions for all Efx net driver code */ 9 10 #ifndef EFX_NET_DRIVER_H 11 #define EFX_NET_DRIVER_H 12 13 #include <linux/netdevice.h> 14 #include <linux/etherdevice.h> 15 #include <linux/ethtool.h> 16 #include <linux/if_vlan.h> 17 #include <linux/timer.h> 18 #include <linux/mdio.h> 19 #include <linux/list.h> 20 #include <linux/pci.h> 21 #include <linux/device.h> 22 #include <linux/highmem.h> 23 #include <linux/workqueue.h> 24 #include <linux/mutex.h> 25 #include <linux/rwsem.h> 26 #include <linux/vmalloc.h> 27 #include <linux/mtd/mtd.h> 28 #include <net/busy_poll.h> 29 #include <net/xdp.h> 30 #include <net/netevent.h> 31 32 #include "enum.h" 33 #include "bitfield.h" 34 #include "filter.h" 35 36 /************************************************************************** 37 * 38 * Build definitions 39 * 40 **************************************************************************/ 41 42 #ifdef DEBUG 43 #define EFX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x) 44 #define EFX_WARN_ON_PARANOID(x) WARN_ON(x) 45 #else 46 #define EFX_WARN_ON_ONCE_PARANOID(x) do {} while (0) 47 #define EFX_WARN_ON_PARANOID(x) do {} while (0) 48 #endif 49 50 /************************************************************************** 51 * 52 * Efx data structures 53 * 54 **************************************************************************/ 55 56 #define EFX_MAX_CHANNELS 32U 57 #define EFX_MAX_RX_QUEUES EFX_MAX_CHANNELS 58 #define EFX_EXTRA_CHANNEL_IOV 0 59 #define EFX_EXTRA_CHANNEL_PTP 1 60 #define EFX_EXTRA_CHANNEL_TC 2 61 #define EFX_MAX_EXTRA_CHANNELS 3U 62 63 /* Checksum generation is a per-queue option in hardware, so each 64 * queue visible to the networking core is backed by two hardware TX 65 * queues. */ 66 #define EFX_MAX_TX_TC 2 67 #define EFX_MAX_CORE_TX_QUEUES (EFX_MAX_TX_TC * EFX_MAX_CHANNELS) 68 #define EFX_TXQ_TYPE_OUTER_CSUM 1 /* Outer checksum offload */ 69 #define EFX_TXQ_TYPE_INNER_CSUM 2 /* Inner checksum offload */ 70 #define EFX_TXQ_TYPES 4 71 #define EFX_MAX_TXQ_PER_CHANNEL 4 72 #define EFX_MAX_TX_QUEUES (EFX_MAX_TXQ_PER_CHANNEL * EFX_MAX_CHANNELS) 73 74 /* Maximum possible MTU the driver supports */ 75 #define EFX_MAX_MTU (9 * 1024) 76 77 /* Minimum MTU, from RFC791 (IP) */ 78 #define EFX_MIN_MTU 68 79 80 /* Maximum total header length for TSOv2 */ 81 #define EFX_TSO2_MAX_HDRLEN 208 82 83 /* Size of an RX scatter buffer. Small enough to pack 2 into a 4K page, 84 * and should be a multiple of the cache line size. 85 */ 86 #define EFX_RX_USR_BUF_SIZE (2048 - 256) 87 88 /* If possible, we should ensure cache line alignment at start and end 89 * of every buffer. Otherwise, we just need to ensure 4-byte 90 * alignment of the network header. 91 */ 92 #if NET_IP_ALIGN == 0 93 #define EFX_RX_BUF_ALIGNMENT L1_CACHE_BYTES 94 #else 95 #define EFX_RX_BUF_ALIGNMENT 4 96 #endif 97 98 /* Non-standard XDP_PACKET_HEADROOM and tailroom to satisfy XDP_REDIRECT and 99 * still fit two standard MTU size packets into a single 4K page. 100 */ 101 #define EFX_XDP_HEADROOM 128 102 #define EFX_XDP_TAILROOM SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) 103 104 /* Forward declare Precision Time Protocol (PTP) support structure. */ 105 struct efx_ptp_data; 106 struct hwtstamp_config; 107 108 struct efx_self_tests; 109 110 /** 111 * struct efx_buffer - A general-purpose DMA buffer 112 * @addr: host base address of the buffer 113 * @dma_addr: DMA base address of the buffer 114 * @len: Buffer length, in bytes 115 * 116 * The NIC uses these buffers for its interrupt status registers and 117 * MAC stats dumps. 118 */ 119 struct efx_buffer { 120 void *addr; 121 dma_addr_t dma_addr; 122 unsigned int len; 123 }; 124 125 /** 126 * struct efx_tx_buffer - buffer state for a TX descriptor 127 * @skb: When @flags & %EFX_TX_BUF_SKB, the associated socket buffer to be 128 * freed when descriptor completes 129 * @xdpf: When @flags & %EFX_TX_BUF_XDP, the XDP frame information; its @data 130 * member is the associated buffer to drop a page reference on. 131 * @option: When @flags & %EFX_TX_BUF_OPTION, an EF10-specific option 132 * descriptor. 133 * @dma_addr: DMA address of the fragment. 134 * @flags: Flags for allocation and DMA mapping type 135 * @len: Length of this fragment. 136 * This field is zero when the queue slot is empty. 137 * @unmap_len: Length of this fragment to unmap 138 * @dma_offset: Offset of @dma_addr from the address of the backing DMA mapping. 139 * Only valid if @unmap_len != 0. 140 */ 141 struct efx_tx_buffer { 142 union { 143 const struct sk_buff *skb; 144 struct xdp_frame *xdpf; 145 }; 146 union { 147 efx_qword_t option; /* EF10 */ 148 dma_addr_t dma_addr; 149 }; 150 unsigned short flags; 151 unsigned short len; 152 unsigned short unmap_len; 153 unsigned short dma_offset; 154 }; 155 #define EFX_TX_BUF_CONT 1 /* not last descriptor of packet */ 156 #define EFX_TX_BUF_SKB 2 /* buffer is last part of skb */ 157 #define EFX_TX_BUF_MAP_SINGLE 8 /* buffer was mapped with dma_map_single() */ 158 #define EFX_TX_BUF_OPTION 0x10 /* empty buffer for option descriptor */ 159 #define EFX_TX_BUF_XDP 0x20 /* buffer was sent with XDP */ 160 #define EFX_TX_BUF_TSO_V3 0x40 /* empty buffer for a TSO_V3 descriptor */ 161 #define EFX_TX_BUF_EFV 0x100 /* buffer was sent from representor */ 162 163 /** 164 * struct efx_tx_queue - An Efx TX queue 165 * 166 * This is a ring buffer of TX fragments. 167 * Since the TX completion path always executes on the same 168 * CPU and the xmit path can operate on different CPUs, 169 * performance is increased by ensuring that the completion 170 * path and the xmit path operate on different cache lines. 171 * This is particularly important if the xmit path is always 172 * executing on one CPU which is different from the completion 173 * path. There is also a cache line for members which are 174 * read but not written on the fast path. 175 * 176 * @efx: The associated Efx NIC 177 * @queue: DMA queue number 178 * @label: Label for TX completion events. 179 * Is our index within @channel->tx_queue array. 180 * @type: configuration type of this TX queue. A bitmask of %EFX_TXQ_TYPE_* flags. 181 * @tso_version: Version of TSO in use for this queue. 182 * @tso_encap: Is encapsulated TSO supported? Supported in TSOv2 on 8000 series. 183 * @channel: The associated channel 184 * @core_txq: The networking core TX queue structure 185 * @buffer: The software buffer ring 186 * @cb_page: Array of pages of copy buffers. Carved up according to 187 * %EFX_TX_CB_ORDER into %EFX_TX_CB_SIZE-sized chunks. 188 * @txd: The hardware descriptor ring 189 * @ptr_mask: The size of the ring minus 1. 190 * @piobuf: PIO buffer region for this TX queue (shared with its partner). 191 * Size of the region is efx_piobuf_size. 192 * @piobuf_offset: Buffer offset to be specified in PIO descriptors 193 * @initialised: Has hardware queue been initialised? 194 * @timestamping: Is timestamping enabled for this channel? 195 * @xdp_tx: Is this an XDP tx queue? 196 * @old_complete_packets: Value of @complete_packets as of last 197 * efx_init_tx_queue() 198 * @old_complete_bytes: Value of @complete_bytes as of last 199 * efx_init_tx_queue() 200 * @old_tso_bursts: Value of @tso_bursts as of last efx_init_tx_queue() 201 * @old_tso_packets: Value of @tso_packets as of last efx_init_tx_queue() 202 * @read_count: Current read pointer. 203 * This is the number of buffers that have been removed from both rings. 204 * @old_write_count: The value of @write_count when last checked. 205 * This is here for performance reasons. The xmit path will 206 * only get the up-to-date value of @write_count if this 207 * variable indicates that the queue is empty. This is to 208 * avoid cache-line ping-pong between the xmit path and the 209 * completion path. 210 * @merge_events: Number of TX merged completion events 211 * @bytes_compl: Number of bytes completed during this NAPI poll 212 * (efx_process_channel()). For BQL. 213 * @pkts_compl: Number of packets completed during this NAPI poll. 214 * @complete_packets: Number of packets completed since this struct was 215 * created. Only counts SKB packets, not XDP TX (it accumulates 216 * the same values that are reported to BQL). 217 * @complete_bytes: Number of bytes completed since this struct was 218 * created. For TSO, counts the superframe size, not the sizes of 219 * generated frames on the wire (i.e. the headers are only counted 220 * once) 221 * @complete_xdp_packets: Number of XDP TX packets completed since this 222 * struct was created. 223 * @complete_xdp_bytes: Number of XDP TX bytes completed since this 224 * struct was created. 225 * @completed_timestamp_major: Top part of the most recent tx timestamp. 226 * @completed_timestamp_minor: Low part of the most recent tx timestamp. 227 * @insert_count: Current insert pointer 228 * This is the number of buffers that have been added to the 229 * software ring. 230 * @write_count: Current write pointer 231 * This is the number of buffers that have been added to the 232 * hardware ring. 233 * @packet_write_count: Completable write pointer 234 * This is the write pointer of the last packet written. 235 * Normally this will equal @write_count, but as option descriptors 236 * don't produce completion events, they won't update this. 237 * Filled in iff @efx->type->option_descriptors; only used for PIO. 238 * Thus, this is only written and used on EF10. 239 * @old_read_count: The value of read_count when last checked. 240 * This is here for performance reasons. The xmit path will 241 * only get the up-to-date value of read_count if this 242 * variable indicates that the queue is full. This is to 243 * avoid cache-line ping-pong between the xmit path and the 244 * completion path. 245 * @tso_bursts: Number of times TSO xmit invoked by kernel 246 * @tso_long_headers: Number of packets with headers too long for standard 247 * blocks 248 * @tso_packets: Number of packets via the TSO xmit path 249 * @tso_fallbacks: Number of times TSO fallback used 250 * @pushes: Number of times the TX push feature has been used 251 * @pio_packets: Number of times the TX PIO feature has been used 252 * @xmit_pending: Are any packets waiting to be pushed to the NIC 253 * @cb_packets: Number of times the TX copybreak feature has been used 254 * @notify_count: Count of notified descriptors to the NIC 255 * @tx_packets: Number of packets sent since this struct was created 256 * @empty_read_count: If the completion path has seen the queue as empty 257 * and the transmission path has not yet checked this, the value of 258 * @read_count bitwise-added to %EFX_EMPTY_COUNT_VALID; otherwise 0. 259 */ 260 struct efx_tx_queue { 261 /* Members which don't change on the fast path */ 262 struct efx_nic *efx ____cacheline_aligned_in_smp; 263 unsigned int queue; 264 unsigned int label; 265 unsigned int type; 266 unsigned int tso_version; 267 bool tso_encap; 268 struct efx_channel *channel; 269 struct netdev_queue *core_txq; 270 struct efx_tx_buffer *buffer; 271 struct efx_buffer *cb_page; 272 struct efx_buffer txd; 273 unsigned int ptr_mask; 274 void __iomem *piobuf; 275 unsigned int piobuf_offset; 276 bool initialised; 277 bool timestamping; 278 bool xdp_tx; 279 unsigned long old_complete_packets; 280 unsigned long old_complete_bytes; 281 unsigned int old_tso_bursts; 282 unsigned int old_tso_packets; 283 284 /* Members used mainly on the completion path */ 285 unsigned int read_count ____cacheline_aligned_in_smp; 286 unsigned int old_write_count; 287 unsigned int merge_events; 288 unsigned int bytes_compl; 289 unsigned int pkts_compl; 290 unsigned long complete_packets; 291 unsigned long complete_bytes; 292 unsigned long complete_xdp_packets; 293 unsigned long complete_xdp_bytes; 294 u32 completed_timestamp_major; 295 u32 completed_timestamp_minor; 296 297 /* Members used only on the xmit path */ 298 unsigned int insert_count ____cacheline_aligned_in_smp; 299 unsigned int write_count; 300 unsigned int packet_write_count; 301 unsigned int old_read_count; 302 unsigned int tso_bursts; 303 unsigned int tso_long_headers; 304 unsigned int tso_packets; 305 unsigned int tso_fallbacks; 306 unsigned int pushes; 307 unsigned int pio_packets; 308 bool xmit_pending; 309 unsigned int cb_packets; 310 unsigned int notify_count; 311 /* Statistics to supplement MAC stats */ 312 unsigned long tx_packets; 313 314 /* Members shared between paths and sometimes updated */ 315 unsigned int empty_read_count ____cacheline_aligned_in_smp; 316 #define EFX_EMPTY_COUNT_VALID 0x80000000 317 atomic_t flush_outstanding; 318 }; 319 320 #define EFX_TX_CB_ORDER 7 321 #define EFX_TX_CB_SIZE (1 << EFX_TX_CB_ORDER) - NET_IP_ALIGN 322 323 /** 324 * struct efx_rx_buffer - An Efx RX data buffer 325 * @dma_addr: DMA base address of the buffer 326 * @page: The associated page buffer. 327 * Will be %NULL if the buffer slot is currently free. 328 * @page_offset: If pending: offset in @page of DMA base address. 329 * If completed: offset in @page of Ethernet header. 330 * @len: If pending: length for DMA descriptor. 331 * If completed: received length, excluding hash prefix. 332 * @flags: Flags for buffer and packet state. These are only set on the 333 * first buffer of a scattered packet. 334 */ 335 struct efx_rx_buffer { 336 dma_addr_t dma_addr; 337 struct page *page; 338 u16 page_offset; 339 u16 len; 340 u16 flags; 341 }; 342 #define EFX_RX_BUF_LAST_IN_PAGE 0x0001 343 #define EFX_RX_PKT_CSUMMED 0x0002 344 #define EFX_RX_PKT_DISCARD 0x0004 345 #define EFX_RX_PKT_TCP 0x0040 346 #define EFX_RX_PKT_PREFIX_LEN 0x0080 /* length is in prefix only */ 347 #define EFX_RX_PKT_CSUM_LEVEL 0x0200 348 349 /** 350 * struct efx_rx_page_state - Page-based rx buffer state 351 * 352 * Inserted at the start of every page allocated for receive buffers. 353 * Used to facilitate sharing dma mappings between recycled rx buffers 354 * and those passed up to the kernel. 355 * 356 * @dma_addr: The dma address of this page. 357 */ 358 struct efx_rx_page_state { 359 dma_addr_t dma_addr; 360 361 unsigned int __pad[] ____cacheline_aligned; 362 }; 363 364 /** 365 * struct efx_rx_queue - An Efx RX queue 366 * @efx: The associated Efx NIC 367 * @core_index: Index of network core RX queue. Will be >= 0 iff this 368 * is associated with a real RX queue. 369 * @buffer: The software buffer ring 370 * @rxd: The hardware descriptor ring 371 * @ptr_mask: The size of the ring minus 1. 372 * @refill_enabled: Enable refill whenever fill level is low 373 * @flush_pending: Set when a RX flush is pending. Has the same lifetime as 374 * @rxq_flush_pending. 375 * @grant_credits: Posted RX descriptors need to be granted to the MAE with 376 * %MC_CMD_MAE_COUNTERS_STREAM_GIVE_CREDITS. For %EFX_EXTRA_CHANNEL_TC, 377 * and only supported on EF100. 378 * @added_count: Number of buffers added to the receive queue. 379 * @notified_count: Number of buffers given to NIC (<= @added_count). 380 * @granted_count: Number of buffers granted to the MAE (<= @notified_count). 381 * @removed_count: Number of buffers removed from the receive queue. 382 * @scatter_n: Used by NIC specific receive code. 383 * @scatter_len: Used by NIC specific receive code. 384 * @page_ring: The ring to store DMA mapped pages for reuse. 385 * @page_add: Counter to calculate the write pointer for the recycle ring. 386 * @page_remove: Counter to calculate the read pointer for the recycle ring. 387 * @page_recycle_count: The number of pages that have been recycled. 388 * @page_recycle_failed: The number of pages that couldn't be recycled because 389 * the kernel still held a reference to them. 390 * @page_recycle_full: The number of pages that were released because the 391 * recycle ring was full. 392 * @page_ptr_mask: The number of pages in the RX recycle ring minus 1. 393 * @max_fill: RX descriptor maximum fill level (<= ring size) 394 * @fast_fill_trigger: RX descriptor fill level that will trigger a fast fill 395 * (<= @max_fill) 396 * @min_fill: RX descriptor minimum non-zero fill level. 397 * This records the minimum fill level observed when a ring 398 * refill was triggered. 399 * @recycle_count: RX buffer recycle counter. 400 * @slow_fill: Timer used to defer efx_nic_generate_fill_event(). 401 * @grant_work: workitem used to grant credits to the MAE if @grant_credits 402 * @rx_packets: Number of packets received since this struct was created 403 * @rx_bytes: Number of bytes received since this struct was created 404 * @old_rx_packets: Value of @rx_packets as of last efx_init_rx_queue() 405 * @old_rx_bytes: Value of @rx_bytes as of last efx_init_rx_queue() 406 * @xdp_rxq_info: XDP specific RX queue information. 407 * @xdp_rxq_info_valid: Is xdp_rxq_info valid data?. 408 */ 409 struct efx_rx_queue { 410 struct efx_nic *efx; 411 int core_index; 412 struct efx_rx_buffer *buffer; 413 struct efx_buffer rxd; 414 unsigned int ptr_mask; 415 bool refill_enabled; 416 bool flush_pending; 417 bool grant_credits; 418 419 unsigned int added_count; 420 unsigned int notified_count; 421 unsigned int granted_count; 422 unsigned int removed_count; 423 unsigned int scatter_n; 424 unsigned int scatter_len; 425 struct page **page_ring; 426 unsigned int page_add; 427 unsigned int page_remove; 428 unsigned int page_recycle_count; 429 unsigned int page_recycle_failed; 430 unsigned int page_recycle_full; 431 unsigned int page_ptr_mask; 432 unsigned int max_fill; 433 unsigned int fast_fill_trigger; 434 unsigned int min_fill; 435 unsigned int min_overfill; 436 unsigned int recycle_count; 437 struct timer_list slow_fill; 438 unsigned int slow_fill_count; 439 struct work_struct grant_work; 440 /* Statistics to supplement MAC stats */ 441 unsigned long rx_packets; 442 unsigned long rx_bytes; 443 unsigned long old_rx_packets; 444 unsigned long old_rx_bytes; 445 struct xdp_rxq_info xdp_rxq_info; 446 bool xdp_rxq_info_valid; 447 }; 448 449 enum efx_sync_events_state { 450 SYNC_EVENTS_DISABLED = 0, 451 SYNC_EVENTS_QUIESCENT, 452 SYNC_EVENTS_REQUESTED, 453 SYNC_EVENTS_VALID, 454 }; 455 456 /** 457 * struct efx_channel - An Efx channel 458 * 459 * A channel comprises an event queue, at least one TX queue, at least 460 * one RX queue, and an associated tasklet for processing the event 461 * queue. 462 * 463 * @efx: Associated Efx NIC 464 * @channel: Channel instance number 465 * @type: Channel type definition 466 * @eventq_init: Event queue initialised flag 467 * @enabled: Channel enabled indicator 468 * @irq: IRQ number (MSI and MSI-X only) 469 * @irq_moderation_us: IRQ moderation value (in microseconds) 470 * @napi_dev: Net device used with NAPI 471 * @napi_str: NAPI control structure 472 * @state: state for NAPI vs busy polling 473 * @state_lock: lock protecting @state 474 * @eventq: Event queue buffer 475 * @eventq_mask: Event queue pointer mask 476 * @eventq_read_ptr: Event queue read pointer 477 * @event_test_cpu: Last CPU to handle interrupt or test event for this channel 478 * @irq_count: Number of IRQs since last adaptive moderation decision 479 * @irq_mod_score: IRQ moderation score 480 * @rfs_filter_count: number of accelerated RFS filters currently in place; 481 * equals the count of @rps_flow_id slots filled 482 * @rfs_last_expiry: value of jiffies last time some accelerated RFS filters 483 * were checked for expiry 484 * @rfs_expire_index: next accelerated RFS filter ID to check for expiry 485 * @n_rfs_succeeded: number of successful accelerated RFS filter insertions 486 * @n_rfs_failed: number of failed accelerated RFS filter insertions 487 * @filter_work: Work item for efx_filter_rfs_expire() 488 * @rps_flow_id: Flow IDs of filters allocated for accelerated RFS, 489 * indexed by filter ID 490 * @n_rx_ip_hdr_chksum_err: Count of RX IP header checksum errors 491 * @n_rx_tcp_udp_chksum_err: Count of RX TCP and UDP checksum errors 492 * @n_rx_frm_trunc: Count of RX_FRM_TRUNC errors 493 * @n_rx_overlength: Count of RX_OVERLENGTH errors 494 * @n_skbuff_leaks: Count of skbuffs leaked due to RX overrun 495 * @n_rx_nodesc_trunc: Number of RX packets truncated and then dropped due to 496 * lack of descriptors 497 * @n_rx_merge_events: Number of RX merged completion events 498 * @n_rx_merge_packets: Number of RX packets completed by merged events 499 * @n_rx_xdp_drops: Count of RX packets intentionally dropped due to XDP 500 * @n_rx_xdp_bad_drops: Count of RX packets dropped due to XDP errors 501 * @n_rx_xdp_tx: Count of RX packets retransmitted due to XDP 502 * @n_rx_xdp_redirect: Count of RX packets redirected to a different NIC by XDP 503 * @n_rx_mport_bad: Count of RX packets dropped because their ingress mport was 504 * not recognised 505 * @old_n_rx_hw_drops: Count of all RX packets dropped for any reason as of last 506 * efx_start_channels() 507 * @old_n_rx_hw_drop_overruns: Value of @n_rx_nodesc_trunc as of last 508 * efx_start_channels() 509 * @rx_pkt_n_frags: Number of fragments in next packet to be delivered by 510 * __efx_rx_packet(), or zero if there is none 511 * @rx_pkt_index: Ring index of first buffer for next packet to be delivered 512 * by __efx_rx_packet(), if @rx_pkt_n_frags != 0 513 * @rx_list: list of SKBs from current RX, awaiting processing 514 * @rx_queue: RX queue for this channel 515 * @tx_queue: TX queues for this channel 516 * @tx_queue_by_type: pointers into @tx_queue, or %NULL, indexed by txq type 517 * @sync_events_state: Current state of sync events on this channel 518 * @sync_timestamp_major: Major part of the last ptp sync event 519 * @sync_timestamp_minor: Minor part of the last ptp sync event 520 */ 521 struct efx_channel { 522 struct efx_nic *efx; 523 int channel; 524 const struct efx_channel_type *type; 525 bool eventq_init; 526 bool enabled; 527 int irq; 528 unsigned int irq_moderation_us; 529 struct net_device *napi_dev; 530 struct napi_struct napi_str; 531 #ifdef CONFIG_NET_RX_BUSY_POLL 532 unsigned long busy_poll_state; 533 #endif 534 struct efx_buffer eventq; 535 unsigned int eventq_mask; 536 unsigned int eventq_read_ptr; 537 int event_test_cpu; 538 539 unsigned int irq_count; 540 unsigned int irq_mod_score; 541 #ifdef CONFIG_RFS_ACCEL 542 unsigned int rfs_filter_count; 543 unsigned int rfs_last_expiry; 544 unsigned int rfs_expire_index; 545 unsigned int n_rfs_succeeded; 546 unsigned int n_rfs_failed; 547 struct delayed_work filter_work; 548 #define RPS_FLOW_ID_INVALID 0xFFFFFFFF 549 u32 *rps_flow_id; 550 #endif 551 552 unsigned int n_rx_ip_hdr_chksum_err; 553 unsigned int n_rx_tcp_udp_chksum_err; 554 unsigned int n_rx_outer_ip_hdr_chksum_err; 555 unsigned int n_rx_outer_tcp_udp_chksum_err; 556 unsigned int n_rx_inner_ip_hdr_chksum_err; 557 unsigned int n_rx_inner_tcp_udp_chksum_err; 558 unsigned int n_rx_eth_crc_err; 559 unsigned int n_rx_frm_trunc; 560 unsigned int n_rx_overlength; 561 unsigned int n_skbuff_leaks; 562 unsigned int n_rx_nodesc_trunc; 563 unsigned int n_rx_merge_events; 564 unsigned int n_rx_merge_packets; 565 unsigned int n_rx_xdp_drops; 566 unsigned int n_rx_xdp_bad_drops; 567 unsigned int n_rx_xdp_tx; 568 unsigned int n_rx_xdp_redirect; 569 unsigned int n_rx_mport_bad; 570 571 unsigned int old_n_rx_hw_drops; 572 unsigned int old_n_rx_hw_drop_overruns; 573 574 unsigned int rx_pkt_n_frags; 575 unsigned int rx_pkt_index; 576 577 struct list_head *rx_list; 578 579 struct efx_rx_queue rx_queue; 580 struct efx_tx_queue tx_queue[EFX_MAX_TXQ_PER_CHANNEL]; 581 struct efx_tx_queue *tx_queue_by_type[EFX_TXQ_TYPES]; 582 583 enum efx_sync_events_state sync_events_state; 584 u32 sync_timestamp_major; 585 u32 sync_timestamp_minor; 586 }; 587 588 /** 589 * struct efx_msi_context - Context for each MSI 590 * @efx: The associated NIC 591 * @index: Index of the channel/IRQ 592 * @name: Name of the channel/IRQ 593 * 594 * Unlike &struct efx_channel, this is never reallocated and is always 595 * safe for the IRQ handler to access. 596 */ 597 struct efx_msi_context { 598 struct efx_nic *efx; 599 unsigned int index; 600 char name[IFNAMSIZ + 6]; 601 }; 602 603 /** 604 * struct efx_channel_type - distinguishes traffic and extra channels 605 * @handle_no_channel: Handle failure to allocate an extra channel 606 * @pre_probe: Set up extra state prior to initialisation 607 * @start: called early in efx_start_channels() 608 * @stop: called early in efx_stop_channels() 609 * @post_remove: Tear down extra state after finalisation, if allocated. 610 * May be called on channels that have not been probed. 611 * @get_name: Generate the channel's name (used for its IRQ handler) 612 * @copy: Copy the channel state prior to reallocation. May be %NULL if 613 * reallocation is not supported. 614 * @receive_skb: Handle an skb ready to be passed to netif_receive_skb() 615 * @receive_raw: Handle an RX buffer ready to be passed to __efx_rx_packet() 616 * @want_txqs: Determine whether this channel should have TX queues 617 * created. If %NULL, TX queues are not created. 618 * @keep_eventq: Flag for whether event queue should be kept initialised 619 * while the device is stopped 620 * @want_pio: Flag for whether PIO buffers should be linked to this 621 * channel's TX queues. 622 */ 623 struct efx_channel_type { 624 void (*handle_no_channel)(struct efx_nic *); 625 int (*pre_probe)(struct efx_channel *); 626 int (*start)(struct efx_channel *); 627 void (*stop)(struct efx_channel *); 628 void (*post_remove)(struct efx_channel *); 629 void (*get_name)(struct efx_channel *, char *buf, size_t len); 630 struct efx_channel *(*copy)(const struct efx_channel *); 631 bool (*receive_skb)(struct efx_channel *, struct sk_buff *); 632 bool (*receive_raw)(struct efx_rx_queue *, u32); 633 bool (*want_txqs)(struct efx_channel *); 634 bool keep_eventq; 635 bool want_pio; 636 }; 637 638 enum efx_led_mode { 639 EFX_LED_OFF = 0, 640 EFX_LED_ON = 1, 641 EFX_LED_DEFAULT = 2 642 }; 643 644 #define STRING_TABLE_LOOKUP(val, member) \ 645 ((val) < member ## _max) ? member ## _names[val] : "(invalid)" 646 647 extern const char *const efx_loopback_mode_names[]; 648 extern const unsigned int efx_loopback_mode_max; 649 #define LOOPBACK_MODE(efx) \ 650 STRING_TABLE_LOOKUP((efx)->loopback_mode, efx_loopback_mode) 651 652 enum efx_int_mode { 653 /* Be careful if altering to correct macro below */ 654 EFX_INT_MODE_MSIX = 0, 655 EFX_INT_MODE_MSI = 1, 656 EFX_INT_MODE_LEGACY = 2, 657 EFX_INT_MODE_MAX /* Insert any new items before this */ 658 }; 659 #define EFX_INT_MODE_USE_MSI(x) (((x)->interrupt_mode) <= EFX_INT_MODE_MSI) 660 661 enum nic_state { 662 STATE_UNINIT = 0, /* device being probed/removed */ 663 STATE_PROBED, /* hardware probed */ 664 STATE_NET_DOWN, /* netdev registered */ 665 STATE_NET_UP, /* ready for traffic */ 666 STATE_DISABLED, /* device disabled due to hardware errors */ 667 668 STATE_RECOVERY = 0x100,/* recovering from PCI error */ 669 STATE_FROZEN = 0x200, /* frozen by power management */ 670 }; 671 672 static inline bool efx_net_active(enum nic_state state) 673 { 674 return state == STATE_NET_DOWN || state == STATE_NET_UP; 675 } 676 677 static inline bool efx_frozen(enum nic_state state) 678 { 679 return state & STATE_FROZEN; 680 } 681 682 static inline bool efx_recovering(enum nic_state state) 683 { 684 return state & STATE_RECOVERY; 685 } 686 687 static inline enum nic_state efx_freeze(enum nic_state state) 688 { 689 WARN_ON(!efx_net_active(state)); 690 return state | STATE_FROZEN; 691 } 692 693 static inline enum nic_state efx_thaw(enum nic_state state) 694 { 695 WARN_ON(!efx_frozen(state)); 696 return state & ~STATE_FROZEN; 697 } 698 699 static inline enum nic_state efx_recover(enum nic_state state) 700 { 701 WARN_ON(!efx_net_active(state)); 702 return state | STATE_RECOVERY; 703 } 704 705 static inline enum nic_state efx_recovered(enum nic_state state) 706 { 707 WARN_ON(!efx_recovering(state)); 708 return state & ~STATE_RECOVERY; 709 } 710 711 /* Forward declaration */ 712 struct efx_nic; 713 714 /* Pseudo bit-mask flow control field */ 715 #define EFX_FC_RX FLOW_CTRL_RX 716 #define EFX_FC_TX FLOW_CTRL_TX 717 #define EFX_FC_AUTO 4 718 719 /** 720 * struct efx_link_state - Current state of the link 721 * @up: Link is up 722 * @fd: Link is full-duplex 723 * @fc: Actual flow control flags 724 * @speed: Link speed (Mbps) 725 */ 726 struct efx_link_state { 727 bool up; 728 bool fd; 729 u8 fc; 730 unsigned int speed; 731 }; 732 733 static inline bool efx_link_state_equal(const struct efx_link_state *left, 734 const struct efx_link_state *right) 735 { 736 return left->up == right->up && left->fd == right->fd && 737 left->fc == right->fc && left->speed == right->speed; 738 } 739 740 /** 741 * enum efx_phy_mode - PHY operating mode flags 742 * @PHY_MODE_NORMAL: on and should pass traffic 743 * @PHY_MODE_TX_DISABLED: on with TX disabled 744 * @PHY_MODE_LOW_POWER: set to low power through MDIO 745 * @PHY_MODE_OFF: switched off through external control 746 * @PHY_MODE_SPECIAL: on but will not pass traffic 747 */ 748 enum efx_phy_mode { 749 PHY_MODE_NORMAL = 0, 750 PHY_MODE_TX_DISABLED = 1, 751 PHY_MODE_LOW_POWER = 2, 752 PHY_MODE_OFF = 4, 753 PHY_MODE_SPECIAL = 8, 754 }; 755 756 static inline bool efx_phy_mode_disabled(enum efx_phy_mode mode) 757 { 758 return !!(mode & ~PHY_MODE_TX_DISABLED); 759 } 760 761 /** 762 * struct efx_hw_stat_desc - Description of a hardware statistic 763 * @name: Name of the statistic as visible through ethtool, or %NULL if 764 * it should not be exposed 765 * @dma_width: Width in bits (0 for non-DMA statistics) 766 * @offset: Offset within stats (ignored for non-DMA statistics) 767 */ 768 struct efx_hw_stat_desc { 769 const char *name; 770 u16 dma_width; 771 u16 offset; 772 }; 773 774 struct vfdi_status; 775 776 /* The reserved RSS context value */ 777 #define EFX_MCDI_RSS_CONTEXT_INVALID 0xffffffff 778 /** 779 * struct efx_rss_context_priv - driver private data for an RSS context 780 * @context_id: the RSS_CONTEXT_ID returned by MC firmware, or 781 * %EFX_MCDI_RSS_CONTEXT_INVALID if this context is not present on the NIC. 782 * @rx_hash_udp_4tuple: UDP 4-tuple hashing enabled 783 */ 784 struct efx_rss_context_priv { 785 u32 context_id; 786 bool rx_hash_udp_4tuple; 787 }; 788 789 /** 790 * struct efx_rss_context - an RSS context 791 * @priv: hardware-specific state 792 * @rx_hash_key: Toeplitz hash key for this RSS context 793 * @indir_table: Indirection table for this RSS context 794 */ 795 struct efx_rss_context { 796 struct efx_rss_context_priv priv; 797 u8 rx_hash_key[40]; 798 u32 rx_indir_table[128]; 799 }; 800 801 #ifdef CONFIG_RFS_ACCEL 802 /* Order of these is important, since filter_id >= %EFX_ARFS_FILTER_ID_PENDING 803 * is used to test if filter does or will exist. 804 */ 805 #define EFX_ARFS_FILTER_ID_PENDING -1 806 #define EFX_ARFS_FILTER_ID_ERROR -2 807 #define EFX_ARFS_FILTER_ID_REMOVING -3 808 /** 809 * struct efx_arfs_rule - record of an ARFS filter and its IDs 810 * @node: linkage into hash table 811 * @spec: details of the filter (used as key for hash table). Use efx->type to 812 * determine which member to use. 813 * @rxq_index: channel to which the filter will steer traffic. 814 * @arfs_id: filter ID which was returned to ARFS 815 * @filter_id: index in software filter table. May be 816 * %EFX_ARFS_FILTER_ID_PENDING if filter was not inserted yet, 817 * %EFX_ARFS_FILTER_ID_ERROR if filter insertion failed, or 818 * %EFX_ARFS_FILTER_ID_REMOVING if expiry is currently removing the filter. 819 */ 820 struct efx_arfs_rule { 821 struct hlist_node node; 822 struct efx_filter_spec spec; 823 u16 rxq_index; 824 u16 arfs_id; 825 s32 filter_id; 826 }; 827 828 /* Size chosen so that the table is one page (4kB) */ 829 #define EFX_ARFS_HASH_TABLE_SIZE 512 830 831 /** 832 * struct efx_async_filter_insertion - Request to asynchronously insert a filter 833 * @net_dev: Reference to the netdevice 834 * @spec: The filter to insert 835 * @work: Workitem for this request 836 * @rxq_index: Identifies the channel for which this request was made 837 * @flow_id: Identifies the kernel-side flow for which this request was made 838 */ 839 struct efx_async_filter_insertion { 840 struct net_device *net_dev; 841 struct efx_filter_spec spec; 842 struct work_struct work; 843 u16 rxq_index; 844 u32 flow_id; 845 }; 846 847 /* Maximum number of ARFS workitems that may be in flight on an efx_nic */ 848 #define EFX_RPS_MAX_IN_FLIGHT 8 849 #endif /* CONFIG_RFS_ACCEL */ 850 851 enum efx_xdp_tx_queues_mode { 852 EFX_XDP_TX_QUEUES_DEDICATED, /* one queue per core, locking not needed */ 853 EFX_XDP_TX_QUEUES_SHARED, /* each queue used by more than 1 core */ 854 EFX_XDP_TX_QUEUES_BORROWED /* queues borrowed from net stack */ 855 }; 856 857 struct efx_mae; 858 859 /** 860 * struct efx_nic - an Efx NIC 861 * @name: Device name (net device name or bus id before net device registered) 862 * @pci_dev: The PCI device 863 * @node: List node for maintaning primary/secondary function lists 864 * @primary: &struct efx_nic instance for the primary function of this 865 * controller. May be the same structure, and may be %NULL if no 866 * primary function is bound. Serialised by rtnl_lock. 867 * @secondary_list: List of &struct efx_nic instances for the secondary PCI 868 * functions of the controller, if this is for the primary function. 869 * Serialised by rtnl_lock. 870 * @type: Controller type attributes 871 * @legacy_irq: IRQ number 872 * @workqueue: Workqueue for port reconfigures and the HW monitor. 873 * Work items do not hold and must not acquire RTNL. 874 * @workqueue_name: Name of workqueue 875 * @reset_work: Scheduled reset workitem 876 * @membase_phys: Memory BAR value as physical address 877 * @membase: Memory BAR value 878 * @vi_stride: step between per-VI registers / memory regions 879 * @interrupt_mode: Interrupt mode 880 * @timer_quantum_ns: Interrupt timer quantum, in nanoseconds 881 * @timer_max_ns: Interrupt timer maximum value, in nanoseconds 882 * @irq_rx_adaptive: Adaptive IRQ moderation enabled for RX event queues 883 * @irqs_hooked: Channel interrupts are hooked 884 * @irq_rx_mod_step_us: Step size for IRQ moderation for RX event queues 885 * @irq_rx_moderation_us: IRQ moderation time for RX event queues 886 * @msg_enable: Log message enable flags 887 * @state: Device state number (%STATE_*). Serialised by the rtnl_lock. 888 * @reset_pending: Bitmask for pending resets 889 * @tx_queue: TX DMA queues 890 * @rx_queue: RX DMA queues 891 * @channel: Channels 892 * @msi_context: Context for each MSI 893 * @extra_channel_types: Types of extra (non-traffic) channels that 894 * should be allocated for this NIC 895 * @mae: Details of the Match Action Engine 896 * @xdp_tx_queue_count: Number of entries in %xdp_tx_queues. 897 * @xdp_tx_queues: Array of pointers to tx queues used for XDP transmit. 898 * @xdp_txq_queues_mode: XDP TX queues sharing strategy. 899 * @rxq_entries: Size of receive queues requested by user. 900 * @txq_entries: Size of transmit queues requested by user. 901 * @txq_stop_thresh: TX queue fill level at or above which we stop it. 902 * @txq_wake_thresh: TX queue fill level at or below which we wake it. 903 * @tx_dc_base: Base qword address in SRAM of TX queue descriptor caches 904 * @rx_dc_base: Base qword address in SRAM of RX queue descriptor caches 905 * @sram_lim_qw: Qword address limit of SRAM 906 * @n_channels: Number of channels in use 907 * @n_rx_channels: Number of channels used for RX (= number of RX queues) 908 * @n_tx_channels: Number of channels used for TX 909 * @n_extra_tx_channels: Number of extra channels with TX queues 910 * @tx_queues_per_channel: number of TX queues probed on each channel 911 * @n_xdp_channels: Number of channels used for XDP TX 912 * @xdp_channel_offset: Offset of zeroth channel used for XPD TX. 913 * @xdp_tx_per_channel: Max number of TX queues on an XDP TX channel. 914 * @rx_ip_align: RX DMA address offset to have IP header aligned in 915 * in accordance with NET_IP_ALIGN 916 * @rx_dma_len: Current maximum RX DMA length 917 * @rx_buffer_order: Order (log2) of number of pages for each RX buffer 918 * @rx_buffer_truesize: Amortised allocation size of an RX buffer, 919 * for use in sk_buff::truesize 920 * @rx_prefix_size: Size of RX prefix before packet data 921 * @rx_packet_hash_offset: Offset of RX flow hash from start of packet data 922 * (valid only if @rx_prefix_size != 0; always negative) 923 * @rx_packet_len_offset: Offset of RX packet length from start of packet data 924 * (valid only for NICs that set %EFX_RX_PKT_PREFIX_LEN; always negative) 925 * @rx_packet_ts_offset: Offset of timestamp from start of packet data 926 * (valid only if channel->sync_timestamps_enabled; always negative) 927 * @rx_scatter: Scatter mode enabled for receives 928 * @rss_context: Main RSS context. 929 * @vport_id: The function's vport ID, only relevant for PFs 930 * @int_error_count: Number of internal errors seen recently 931 * @int_error_expire: Time at which error count will be expired 932 * @must_realloc_vis: Flag: VIs have yet to be reallocated after MC reboot 933 * @irq_soft_enabled: Are IRQs soft-enabled? If not, IRQ handler will 934 * acknowledge but do nothing else. 935 * @irq_status: Interrupt status buffer 936 * @irq_zero_count: Number of legacy IRQs seen with queue flags == 0 937 * @irq_level: IRQ level/index for IRQs not triggered by an event queue 938 * @selftest_work: Work item for asynchronous self-test 939 * @mtd_list: List of MTDs attached to the NIC 940 * @nic_data: Hardware dependent state 941 * @mcdi: Management-Controller-to-Driver Interface state 942 * @mac_lock: MAC access lock. Protects @port_enabled, @phy_mode, 943 * efx_monitor() and efx_reconfigure_port() 944 * @port_enabled: Port enabled indicator. 945 * Serialises efx_stop_all(), efx_start_all(), efx_monitor() and 946 * efx_mac_work() with kernel interfaces. Safe to read under any 947 * one of the rtnl_lock, mac_lock, or netif_tx_lock, but all three must 948 * be held to modify it. 949 * @port_initialized: Port initialized? 950 * @net_dev: Operating system network device. Consider holding the rtnl lock 951 * @fixed_features: Features which cannot be turned off 952 * @num_mac_stats: Number of MAC stats reported by firmware (MAC_STATS_NUM_STATS 953 * field of %MC_CMD_GET_CAPABILITIES_V4 response, or %MC_CMD_MAC_NSTATS) 954 * @stats_buffer: DMA buffer for statistics 955 * @phy_type: PHY type 956 * @phy_data: PHY private data (including PHY-specific stats) 957 * @mdio: PHY MDIO interface 958 * @mdio_bus: PHY MDIO bus ID (only used by Siena) 959 * @phy_mode: PHY operating mode. Serialised by @mac_lock. 960 * @link_advertising: Autonegotiation advertising flags 961 * @fec_config: Forward Error Correction configuration flags. For bit positions 962 * see &enum ethtool_fec_config_bits. 963 * @link_state: Current state of the link 964 * @n_link_state_changes: Number of times the link has changed state 965 * @wanted_fc: Wanted flow control flags 966 * @fc_disable: When non-zero flow control is disabled. Typically used to 967 * ensure that network back pressure doesn't delay dma queue flushes. 968 * Serialised by the rtnl lock. 969 * @mac_work: Work item for changing MAC promiscuity and multicast hash 970 * @loopback_mode: Loopback status 971 * @loopback_modes: Supported loopback mode bitmask 972 * @loopback_selftest: Offline self-test private state 973 * @xdp_prog: Current XDP programme for this interface 974 * @filter_sem: Filter table rw_semaphore, protects existence of @filter_state 975 * @filter_state: Architecture-dependent filter table state 976 * @rps_mutex: Protects RPS state of all channels 977 * @rps_slot_map: bitmap of in-flight entries in @rps_slot 978 * @rps_slot: array of ARFS insertion requests for efx_filter_rfs_work() 979 * @rps_hash_lock: Protects ARFS filter mapping state (@rps_hash_table and 980 * @rps_next_id). 981 * @rps_hash_table: Mapping between ARFS filters and their various IDs 982 * @rps_next_id: next arfs_id for an ARFS filter 983 * @active_queues: Count of RX and TX queues that haven't been flushed and drained. 984 * @rxq_flush_pending: Count of number of receive queues that need to be flushed. 985 * Decremented when the efx_flush_rx_queue() is called. 986 * @rxq_flush_outstanding: Count of number of RX flushes started but not yet 987 * completed (either success or failure). Not used when MCDI is used to 988 * flush receive queues. 989 * @flush_wq: wait queue used by efx_nic_flush_queues() to wait for flush completions. 990 * @vf_count: Number of VFs intended to be enabled. 991 * @vf_init_count: Number of VFs that have been fully initialised. 992 * @vi_scale: log2 number of vnics per VF. 993 * @vf_reps_lock: Protects vf_reps list 994 * @vf_reps: local VF reps 995 * @ptp_data: PTP state data 996 * @ptp_warned: has this NIC seen and warned about unexpected PTP events? 997 * @vpd_sn: Serial number read from VPD 998 * @xdp_rxq_info_failed: Have any of the rx queues failed to initialise their 999 * xdp_rxq_info structures? 1000 * @netdev_notifier: Netdevice notifier. 1001 * @netevent_notifier: Netevent notifier (for neighbour updates). 1002 * @tc: state for TC offload (EF100). 1003 * @devlink: reference to devlink structure owned by this device 1004 * @dl_port: devlink port associated with the PF 1005 * @mem_bar: The BAR that is mapped into membase. 1006 * @reg_base: Offset from the start of the bar to the function control window. 1007 * @monitor_work: Hardware monitor workitem 1008 * @biu_lock: BIU (bus interface unit) lock 1009 * @last_irq_cpu: Last CPU to handle a possible test interrupt. This 1010 * field is used by efx_test_interrupts() to verify that an 1011 * interrupt has occurred. 1012 * @stats_lock: Statistics update lock. Must be held when calling 1013 * efx_nic_type::{update,start,stop}_stats. 1014 * @n_rx_noskb_drops: Count of RX packets dropped due to failure to allocate an skb 1015 * 1016 * This is stored in the private area of the &struct net_device. 1017 */ 1018 struct efx_nic { 1019 /* The following fields should be written very rarely */ 1020 1021 char name[IFNAMSIZ]; 1022 struct list_head node; 1023 struct efx_nic *primary; 1024 struct list_head secondary_list; 1025 struct pci_dev *pci_dev; 1026 unsigned int port_num; 1027 const struct efx_nic_type *type; 1028 int legacy_irq; 1029 bool eeh_disabled_legacy_irq; 1030 struct workqueue_struct *workqueue; 1031 char workqueue_name[16]; 1032 struct work_struct reset_work; 1033 resource_size_t membase_phys; 1034 void __iomem *membase; 1035 1036 unsigned int vi_stride; 1037 1038 enum efx_int_mode interrupt_mode; 1039 unsigned int timer_quantum_ns; 1040 unsigned int timer_max_ns; 1041 bool irq_rx_adaptive; 1042 bool irqs_hooked; 1043 unsigned int irq_mod_step_us; 1044 unsigned int irq_rx_moderation_us; 1045 u32 msg_enable; 1046 1047 enum nic_state state; 1048 unsigned long reset_pending; 1049 1050 struct efx_channel *channel[EFX_MAX_CHANNELS]; 1051 struct efx_msi_context msi_context[EFX_MAX_CHANNELS]; 1052 const struct efx_channel_type * 1053 extra_channel_type[EFX_MAX_EXTRA_CHANNELS]; 1054 struct efx_mae *mae; 1055 1056 unsigned int xdp_tx_queue_count; 1057 struct efx_tx_queue **xdp_tx_queues; 1058 enum efx_xdp_tx_queues_mode xdp_txq_queues_mode; 1059 1060 unsigned rxq_entries; 1061 unsigned txq_entries; 1062 unsigned int txq_stop_thresh; 1063 unsigned int txq_wake_thresh; 1064 1065 unsigned tx_dc_base; 1066 unsigned rx_dc_base; 1067 unsigned sram_lim_qw; 1068 1069 unsigned int max_channels; 1070 unsigned int max_vis; 1071 unsigned int max_tx_channels; 1072 unsigned n_channels; 1073 unsigned n_rx_channels; 1074 unsigned rss_spread; 1075 unsigned tx_channel_offset; 1076 unsigned n_tx_channels; 1077 unsigned n_extra_tx_channels; 1078 unsigned int tx_queues_per_channel; 1079 unsigned int n_xdp_channels; 1080 unsigned int xdp_channel_offset; 1081 unsigned int xdp_tx_per_channel; 1082 unsigned int rx_ip_align; 1083 unsigned int rx_dma_len; 1084 unsigned int rx_buffer_order; 1085 unsigned int rx_buffer_truesize; 1086 unsigned int rx_page_buf_step; 1087 unsigned int rx_bufs_per_page; 1088 unsigned int rx_pages_per_batch; 1089 unsigned int rx_prefix_size; 1090 int rx_packet_hash_offset; 1091 int rx_packet_len_offset; 1092 int rx_packet_ts_offset; 1093 bool rx_scatter; 1094 struct efx_rss_context rss_context; 1095 u32 vport_id; 1096 1097 unsigned int_error_count; 1098 unsigned long int_error_expire; 1099 1100 bool must_realloc_vis; 1101 bool irq_soft_enabled; 1102 struct efx_buffer irq_status; 1103 unsigned irq_zero_count; 1104 unsigned irq_level; 1105 struct delayed_work selftest_work; 1106 1107 #ifdef CONFIG_SFC_MTD 1108 struct list_head mtd_list; 1109 #endif 1110 1111 void *nic_data; 1112 struct efx_mcdi_data *mcdi; 1113 1114 struct mutex mac_lock; 1115 struct work_struct mac_work; 1116 bool port_enabled; 1117 1118 bool mc_bist_for_other_fn; 1119 bool port_initialized; 1120 struct net_device *net_dev; 1121 1122 netdev_features_t fixed_features; 1123 1124 u16 num_mac_stats; 1125 struct efx_buffer stats_buffer; 1126 u64 rx_nodesc_drops_total; 1127 u64 rx_nodesc_drops_while_down; 1128 bool rx_nodesc_drops_prev_state; 1129 1130 unsigned int phy_type; 1131 void *phy_data; 1132 struct mdio_if_info mdio; 1133 unsigned int mdio_bus; 1134 enum efx_phy_mode phy_mode; 1135 1136 __ETHTOOL_DECLARE_LINK_MODE_MASK(link_advertising); 1137 u32 fec_config; 1138 struct efx_link_state link_state; 1139 unsigned int n_link_state_changes; 1140 1141 u8 wanted_fc; 1142 unsigned fc_disable; 1143 1144 atomic_t rx_reset; 1145 enum efx_loopback_mode loopback_mode; 1146 u64 loopback_modes; 1147 1148 void *loopback_selftest; 1149 /* We access loopback_selftest immediately before running XDP, 1150 * so we want them next to each other. 1151 */ 1152 struct bpf_prog __rcu *xdp_prog; 1153 1154 struct rw_semaphore filter_sem; 1155 void *filter_state; 1156 #ifdef CONFIG_RFS_ACCEL 1157 struct mutex rps_mutex; 1158 unsigned long rps_slot_map; 1159 struct efx_async_filter_insertion rps_slot[EFX_RPS_MAX_IN_FLIGHT]; 1160 spinlock_t rps_hash_lock; 1161 struct hlist_head *rps_hash_table; 1162 u32 rps_next_id; 1163 #endif 1164 1165 atomic_t active_queues; 1166 atomic_t rxq_flush_pending; 1167 atomic_t rxq_flush_outstanding; 1168 wait_queue_head_t flush_wq; 1169 1170 #ifdef CONFIG_SFC_SRIOV 1171 unsigned vf_count; 1172 unsigned vf_init_count; 1173 unsigned vi_scale; 1174 #endif 1175 spinlock_t vf_reps_lock; 1176 struct list_head vf_reps; 1177 1178 struct efx_ptp_data *ptp_data; 1179 bool ptp_warned; 1180 1181 char *vpd_sn; 1182 bool xdp_rxq_info_failed; 1183 1184 struct notifier_block netdev_notifier; 1185 struct notifier_block netevent_notifier; 1186 struct efx_tc_state *tc; 1187 1188 struct devlink *devlink; 1189 struct devlink_port *dl_port; 1190 unsigned int mem_bar; 1191 u32 reg_base; 1192 1193 /* The following fields may be written more often */ 1194 1195 struct delayed_work monitor_work ____cacheline_aligned_in_smp; 1196 spinlock_t biu_lock; 1197 int last_irq_cpu; 1198 spinlock_t stats_lock; 1199 atomic_t n_rx_noskb_drops; 1200 }; 1201 1202 /** 1203 * struct efx_probe_data - State after hardware probe 1204 * @pci_dev: The PCI device 1205 * @efx: Efx NIC details 1206 */ 1207 struct efx_probe_data { 1208 struct pci_dev *pci_dev; 1209 struct efx_nic efx; 1210 }; 1211 1212 static inline struct efx_nic *efx_netdev_priv(struct net_device *dev) 1213 { 1214 struct efx_probe_data **probe_ptr = netdev_priv(dev); 1215 struct efx_probe_data *probe_data = *probe_ptr; 1216 1217 return &probe_data->efx; 1218 } 1219 1220 static inline int efx_dev_registered(struct efx_nic *efx) 1221 { 1222 return efx->net_dev->reg_state == NETREG_REGISTERED; 1223 } 1224 1225 static inline unsigned int efx_port_num(struct efx_nic *efx) 1226 { 1227 return efx->port_num; 1228 } 1229 1230 struct efx_mtd_partition { 1231 struct list_head node; 1232 struct mtd_info mtd; 1233 const char *dev_type_name; 1234 const char *type_name; 1235 char name[IFNAMSIZ + 20]; 1236 }; 1237 1238 struct efx_udp_tunnel { 1239 #define TUNNEL_ENCAP_UDP_PORT_ENTRY_INVALID 0xffff 1240 u16 type; /* TUNNEL_ENCAP_UDP_PORT_ENTRY_foo, see mcdi_pcol.h */ 1241 __be16 port; 1242 }; 1243 1244 /** 1245 * struct efx_nic_type - Efx device type definition 1246 * @mem_bar: Get the memory BAR 1247 * @mem_map_size: Get memory BAR mapped size 1248 * @probe: Probe the controller 1249 * @remove: Free resources allocated by probe() 1250 * @init: Initialise the controller 1251 * @dimension_resources: Dimension controller resources (buffer table, 1252 * and VIs once the available interrupt resources are clear) 1253 * @fini: Shut down the controller 1254 * @monitor: Periodic function for polling link state and hardware monitor 1255 * @map_reset_reason: Map ethtool reset reason to a reset method 1256 * @map_reset_flags: Map ethtool reset flags to a reset method, if possible 1257 * @reset: Reset the controller hardware and possibly the PHY. This will 1258 * be called while the controller is uninitialised. 1259 * @probe_port: Probe the MAC and PHY 1260 * @remove_port: Free resources allocated by probe_port() 1261 * @handle_global_event: Handle a "global" event (may be %NULL) 1262 * @fini_dmaq: Flush and finalise DMA queues (RX and TX queues) 1263 * @prepare_flr: Prepare for an FLR 1264 * @finish_flr: Clean up after an FLR 1265 * @describe_stats: Describe statistics for ethtool 1266 * @update_stats: Update statistics not provided by event handling. 1267 * Either argument may be %NULL. 1268 * @update_stats_atomic: Update statistics while in atomic context, if that 1269 * is more limiting than @update_stats. Otherwise, leave %NULL and 1270 * driver core will call @update_stats. 1271 * @start_stats: Start the regular fetching of statistics 1272 * @pull_stats: Pull stats from the NIC and wait until they arrive. 1273 * @stop_stats: Stop the regular fetching of statistics 1274 * @push_irq_moderation: Apply interrupt moderation value 1275 * @reconfigure_port: Push loopback/power/txdis changes to the MAC and PHY 1276 * @prepare_enable_fc_tx: Prepare MAC to enable pause frame TX (may be %NULL) 1277 * @reconfigure_mac: Push MAC address, MTU, flow control and filter settings 1278 * to the hardware. Serialised by the mac_lock. 1279 * @check_mac_fault: Check MAC fault state. True if fault present. 1280 * @get_wol: Get WoL configuration from driver state 1281 * @set_wol: Push WoL configuration to the NIC 1282 * @resume_wol: Synchronise WoL state between driver and MC (e.g. after resume) 1283 * @get_fec_stats: Get standard FEC statistics. 1284 * @test_chip: Test registers. This is expected to reset the NIC. 1285 * @test_nvram: Test validity of NVRAM contents 1286 * @mcdi_request: Send an MCDI request with the given header and SDU. 1287 * The SDU length may be any value from 0 up to the protocol- 1288 * defined maximum, but its buffer will be padded to a multiple 1289 * of 4 bytes. 1290 * @mcdi_poll_response: Test whether an MCDI response is available. 1291 * @mcdi_read_response: Read the MCDI response PDU. The offset will 1292 * be a multiple of 4. The length may not be, but the buffer 1293 * will be padded so it is safe to round up. 1294 * @mcdi_poll_reboot: Test whether the MCDI has rebooted. If so, 1295 * return an appropriate error code for aborting any current 1296 * request; otherwise return 0. 1297 * @irq_enable_master: Enable IRQs on the NIC. Each event queue must 1298 * be separately enabled after this. 1299 * @irq_test_generate: Generate a test IRQ 1300 * @irq_disable_non_ev: Disable non-event IRQs on the NIC. Each event 1301 * queue must be separately disabled before this. 1302 * @irq_handle_msi: Handle MSI for a channel. The @dev_id argument is 1303 * a pointer to the &struct efx_msi_context for the channel. 1304 * @irq_handle_legacy: Handle legacy interrupt. The @dev_id argument 1305 * is a pointer to the &struct efx_nic. 1306 * @tx_probe: Allocate resources for TX queue (and select TXQ type) 1307 * @tx_init: Initialise TX queue on the NIC 1308 * @tx_remove: Free resources for TX queue 1309 * @tx_write: Write TX descriptors and doorbell 1310 * @tx_enqueue: Add an SKB to TX queue 1311 * @rx_push_rss_config: Write RSS hash key and indirection table to the NIC 1312 * @rx_pull_rss_config: Read RSS hash key and indirection table back from the NIC 1313 * @rx_push_rss_context_config: Write RSS hash key and indirection table for 1314 * user RSS context to the NIC 1315 * @rx_pull_rss_context_config: Read RSS hash key and indirection table for user 1316 * RSS context back from the NIC 1317 * @rx_probe: Allocate resources for RX queue 1318 * @rx_init: Initialise RX queue on the NIC 1319 * @rx_remove: Free resources for RX queue 1320 * @rx_write: Write RX descriptors and doorbell 1321 * @rx_defer_refill: Generate a refill reminder event 1322 * @rx_packet: Receive the queued RX buffer on a channel 1323 * @rx_buf_hash_valid: Determine whether the RX prefix contains a valid hash 1324 * @ev_probe: Allocate resources for event queue 1325 * @ev_init: Initialise event queue on the NIC 1326 * @ev_fini: Deinitialise event queue on the NIC 1327 * @ev_remove: Free resources for event queue 1328 * @ev_process: Process events for a queue, up to the given NAPI quota 1329 * @ev_read_ack: Acknowledge read events on a queue, rearming its IRQ 1330 * @ev_test_generate: Generate a test event 1331 * @filter_table_probe: Probe filter capabilities and set up filter software state 1332 * @filter_table_restore: Restore filters removed from hardware 1333 * @filter_table_remove: Remove filters from hardware and tear down software state 1334 * @filter_update_rx_scatter: Update filters after change to rx scatter setting 1335 * @filter_insert: add or replace a filter 1336 * @filter_remove_safe: remove a filter by ID, carefully 1337 * @filter_get_safe: retrieve a filter by ID, carefully 1338 * @filter_clear_rx: Remove all RX filters whose priority is less than or 1339 * equal to the given priority and is not %EFX_FILTER_PRI_AUTO 1340 * @filter_count_rx_used: Get the number of filters in use at a given priority 1341 * @filter_get_rx_id_limit: Get maximum value of a filter id, plus 1 1342 * @filter_get_rx_ids: Get list of RX filters at a given priority 1343 * @filter_rfs_expire_one: Consider expiring a filter inserted for RFS. 1344 * This must check whether the specified table entry is used by RFS 1345 * and that rps_may_expire_flow() returns true for it. 1346 * @mtd_probe: Probe and add MTD partitions associated with this net device, 1347 * using efx_mtd_add() 1348 * @mtd_rename: Set an MTD partition name using the net device name 1349 * @mtd_read: Read from an MTD partition 1350 * @mtd_erase: Erase part of an MTD partition 1351 * @mtd_write: Write to an MTD partition 1352 * @mtd_sync: Wait for write-back to complete on MTD partition. This 1353 * also notifies the driver that a writer has finished using this 1354 * partition. 1355 * @ptp_write_host_time: Send host time to MC as part of sync protocol 1356 * @ptp_set_ts_sync_events: Enable or disable sync events for inline RX 1357 * timestamping, possibly only temporarily for the purposes of a reset. 1358 * @ptp_set_ts_config: Set hardware timestamp configuration. The flags 1359 * and tx_type will already have been validated but this operation 1360 * must validate and update rx_filter. 1361 * @get_phys_port_id: Get the underlying physical port id. 1362 * @set_mac_address: Set the MAC address of the device 1363 * @tso_versions: Returns mask of firmware-assisted TSO versions supported. 1364 * If %NULL, then device does not support any TSO version. 1365 * @udp_tnl_push_ports: Push the list of UDP tunnel ports to the NIC if required. 1366 * @udp_tnl_has_port: Check if a port has been added as UDP tunnel 1367 * @print_additional_fwver: Dump NIC-specific additional FW version info 1368 * @sensor_event: Handle a sensor event from MCDI 1369 * @rx_recycle_ring_size: Size of the RX recycle ring 1370 * @revision: Hardware architecture revision 1371 * @txd_ptr_tbl_base: TX descriptor ring base address 1372 * @rxd_ptr_tbl_base: RX descriptor ring base address 1373 * @buf_tbl_base: Buffer table base address 1374 * @evq_ptr_tbl_base: Event queue pointer table base address 1375 * @evq_rptr_tbl_base: Event queue read-pointer table base address 1376 * @max_dma_mask: Maximum possible DMA mask 1377 * @rx_prefix_size: Size of RX prefix before packet data 1378 * @rx_hash_offset: Offset of RX flow hash within prefix 1379 * @rx_ts_offset: Offset of timestamp within prefix 1380 * @rx_buffer_padding: Size of padding at end of RX packet 1381 * @can_rx_scatter: NIC is able to scatter packets to multiple buffers 1382 * @always_rx_scatter: NIC will always scatter packets to multiple buffers 1383 * @option_descriptors: NIC supports TX option descriptors 1384 * @min_interrupt_mode: Lowest capability interrupt mode supported 1385 * from &enum efx_int_mode. 1386 * @timer_period_max: Maximum period of interrupt timer (in ticks) 1387 * @offload_features: net_device feature flags for protocol offload 1388 * features implemented in hardware 1389 * @mcdi_max_ver: Maximum MCDI version supported 1390 * @hwtstamp_filters: Mask of hardware timestamp filter types supported 1391 */ 1392 struct efx_nic_type { 1393 bool is_vf; 1394 unsigned int (*mem_bar)(struct efx_nic *efx); 1395 unsigned int (*mem_map_size)(struct efx_nic *efx); 1396 int (*probe)(struct efx_nic *efx); 1397 void (*remove)(struct efx_nic *efx); 1398 int (*init)(struct efx_nic *efx); 1399 int (*dimension_resources)(struct efx_nic *efx); 1400 void (*fini)(struct efx_nic *efx); 1401 void (*monitor)(struct efx_nic *efx); 1402 enum reset_type (*map_reset_reason)(enum reset_type reason); 1403 int (*map_reset_flags)(u32 *flags); 1404 int (*reset)(struct efx_nic *efx, enum reset_type method); 1405 int (*probe_port)(struct efx_nic *efx); 1406 void (*remove_port)(struct efx_nic *efx); 1407 bool (*handle_global_event)(struct efx_channel *channel, efx_qword_t *); 1408 int (*fini_dmaq)(struct efx_nic *efx); 1409 void (*prepare_flr)(struct efx_nic *efx); 1410 void (*finish_flr)(struct efx_nic *efx); 1411 size_t (*describe_stats)(struct efx_nic *efx, u8 **names); 1412 size_t (*update_stats)(struct efx_nic *efx, u64 *full_stats, 1413 struct rtnl_link_stats64 *core_stats); 1414 size_t (*update_stats_atomic)(struct efx_nic *efx, u64 *full_stats, 1415 struct rtnl_link_stats64 *core_stats); 1416 void (*start_stats)(struct efx_nic *efx); 1417 void (*pull_stats)(struct efx_nic *efx); 1418 void (*stop_stats)(struct efx_nic *efx); 1419 void (*push_irq_moderation)(struct efx_channel *channel); 1420 int (*reconfigure_port)(struct efx_nic *efx); 1421 void (*prepare_enable_fc_tx)(struct efx_nic *efx); 1422 int (*reconfigure_mac)(struct efx_nic *efx, bool mtu_only); 1423 bool (*check_mac_fault)(struct efx_nic *efx); 1424 void (*get_wol)(struct efx_nic *efx, struct ethtool_wolinfo *wol); 1425 int (*set_wol)(struct efx_nic *efx, u32 type); 1426 void (*resume_wol)(struct efx_nic *efx); 1427 void (*get_fec_stats)(struct efx_nic *efx, 1428 struct ethtool_fec_stats *fec_stats); 1429 unsigned int (*check_caps)(const struct efx_nic *efx, 1430 u8 flag, 1431 u32 offset); 1432 int (*test_chip)(struct efx_nic *efx, struct efx_self_tests *tests); 1433 int (*test_nvram)(struct efx_nic *efx); 1434 void (*mcdi_request)(struct efx_nic *efx, 1435 const efx_dword_t *hdr, size_t hdr_len, 1436 const efx_dword_t *sdu, size_t sdu_len); 1437 bool (*mcdi_poll_response)(struct efx_nic *efx); 1438 void (*mcdi_read_response)(struct efx_nic *efx, efx_dword_t *pdu, 1439 size_t pdu_offset, size_t pdu_len); 1440 int (*mcdi_poll_reboot)(struct efx_nic *efx); 1441 void (*mcdi_reboot_detected)(struct efx_nic *efx); 1442 void (*irq_enable_master)(struct efx_nic *efx); 1443 int (*irq_test_generate)(struct efx_nic *efx); 1444 void (*irq_disable_non_ev)(struct efx_nic *efx); 1445 irqreturn_t (*irq_handle_msi)(int irq, void *dev_id); 1446 irqreturn_t (*irq_handle_legacy)(int irq, void *dev_id); 1447 int (*tx_probe)(struct efx_tx_queue *tx_queue); 1448 void (*tx_init)(struct efx_tx_queue *tx_queue); 1449 void (*tx_remove)(struct efx_tx_queue *tx_queue); 1450 void (*tx_write)(struct efx_tx_queue *tx_queue); 1451 netdev_tx_t (*tx_enqueue)(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 1452 unsigned int (*tx_limit_len)(struct efx_tx_queue *tx_queue, 1453 dma_addr_t dma_addr, unsigned int len); 1454 int (*rx_push_rss_config)(struct efx_nic *efx, bool user, 1455 const u32 *rx_indir_table, const u8 *key); 1456 int (*rx_pull_rss_config)(struct efx_nic *efx); 1457 int (*rx_push_rss_context_config)(struct efx_nic *efx, 1458 struct efx_rss_context_priv *ctx, 1459 const u32 *rx_indir_table, 1460 const u8 *key, bool delete); 1461 int (*rx_pull_rss_context_config)(struct efx_nic *efx, 1462 struct efx_rss_context *ctx); 1463 void (*rx_restore_rss_contexts)(struct efx_nic *efx); 1464 int (*rx_probe)(struct efx_rx_queue *rx_queue); 1465 void (*rx_init)(struct efx_rx_queue *rx_queue); 1466 void (*rx_remove)(struct efx_rx_queue *rx_queue); 1467 void (*rx_write)(struct efx_rx_queue *rx_queue); 1468 void (*rx_defer_refill)(struct efx_rx_queue *rx_queue); 1469 void (*rx_packet)(struct efx_channel *channel); 1470 bool (*rx_buf_hash_valid)(const u8 *prefix); 1471 int (*ev_probe)(struct efx_channel *channel); 1472 int (*ev_init)(struct efx_channel *channel); 1473 void (*ev_fini)(struct efx_channel *channel); 1474 void (*ev_remove)(struct efx_channel *channel); 1475 int (*ev_process)(struct efx_channel *channel, int quota); 1476 void (*ev_read_ack)(struct efx_channel *channel); 1477 void (*ev_test_generate)(struct efx_channel *channel); 1478 int (*filter_table_probe)(struct efx_nic *efx); 1479 void (*filter_table_restore)(struct efx_nic *efx); 1480 void (*filter_table_remove)(struct efx_nic *efx); 1481 void (*filter_update_rx_scatter)(struct efx_nic *efx); 1482 s32 (*filter_insert)(struct efx_nic *efx, 1483 struct efx_filter_spec *spec, bool replace); 1484 int (*filter_remove_safe)(struct efx_nic *efx, 1485 enum efx_filter_priority priority, 1486 u32 filter_id); 1487 int (*filter_get_safe)(struct efx_nic *efx, 1488 enum efx_filter_priority priority, 1489 u32 filter_id, struct efx_filter_spec *); 1490 int (*filter_clear_rx)(struct efx_nic *efx, 1491 enum efx_filter_priority priority); 1492 u32 (*filter_count_rx_used)(struct efx_nic *efx, 1493 enum efx_filter_priority priority); 1494 u32 (*filter_get_rx_id_limit)(struct efx_nic *efx); 1495 s32 (*filter_get_rx_ids)(struct efx_nic *efx, 1496 enum efx_filter_priority priority, 1497 u32 *buf, u32 size); 1498 #ifdef CONFIG_RFS_ACCEL 1499 bool (*filter_rfs_expire_one)(struct efx_nic *efx, u32 flow_id, 1500 unsigned int index); 1501 #endif 1502 #ifdef CONFIG_SFC_MTD 1503 int (*mtd_probe)(struct efx_nic *efx); 1504 void (*mtd_rename)(struct efx_mtd_partition *part); 1505 int (*mtd_read)(struct mtd_info *mtd, loff_t start, size_t len, 1506 size_t *retlen, u8 *buffer); 1507 int (*mtd_erase)(struct mtd_info *mtd, loff_t start, size_t len); 1508 int (*mtd_write)(struct mtd_info *mtd, loff_t start, size_t len, 1509 size_t *retlen, const u8 *buffer); 1510 int (*mtd_sync)(struct mtd_info *mtd); 1511 #endif 1512 void (*ptp_write_host_time)(struct efx_nic *efx, u32 host_time); 1513 int (*ptp_set_ts_sync_events)(struct efx_nic *efx, bool en, bool temp); 1514 int (*ptp_set_ts_config)(struct efx_nic *efx, 1515 struct kernel_hwtstamp_config *init); 1516 int (*sriov_configure)(struct efx_nic *efx, int num_vfs); 1517 int (*vlan_rx_add_vid)(struct efx_nic *efx, __be16 proto, u16 vid); 1518 int (*vlan_rx_kill_vid)(struct efx_nic *efx, __be16 proto, u16 vid); 1519 int (*get_phys_port_id)(struct efx_nic *efx, 1520 struct netdev_phys_item_id *ppid); 1521 int (*sriov_init)(struct efx_nic *efx); 1522 void (*sriov_fini)(struct efx_nic *efx); 1523 bool (*sriov_wanted)(struct efx_nic *efx); 1524 int (*sriov_set_vf_mac)(struct efx_nic *efx, int vf_i, const u8 *mac); 1525 int (*sriov_set_vf_vlan)(struct efx_nic *efx, int vf_i, u16 vlan, 1526 u8 qos); 1527 int (*sriov_set_vf_spoofchk)(struct efx_nic *efx, int vf_i, 1528 bool spoofchk); 1529 int (*sriov_get_vf_config)(struct efx_nic *efx, int vf_i, 1530 struct ifla_vf_info *ivi); 1531 int (*sriov_set_vf_link_state)(struct efx_nic *efx, int vf_i, 1532 int link_state); 1533 int (*vswitching_probe)(struct efx_nic *efx); 1534 int (*vswitching_restore)(struct efx_nic *efx); 1535 void (*vswitching_remove)(struct efx_nic *efx); 1536 int (*get_mac_address)(struct efx_nic *efx, unsigned char *perm_addr); 1537 int (*set_mac_address)(struct efx_nic *efx); 1538 u32 (*tso_versions)(struct efx_nic *efx); 1539 int (*udp_tnl_push_ports)(struct efx_nic *efx); 1540 bool (*udp_tnl_has_port)(struct efx_nic *efx, __be16 port); 1541 size_t (*print_additional_fwver)(struct efx_nic *efx, char *buf, 1542 size_t len); 1543 void (*sensor_event)(struct efx_nic *efx, efx_qword_t *ev); 1544 unsigned int (*rx_recycle_ring_size)(const struct efx_nic *efx); 1545 1546 int revision; 1547 unsigned int txd_ptr_tbl_base; 1548 unsigned int rxd_ptr_tbl_base; 1549 unsigned int buf_tbl_base; 1550 unsigned int evq_ptr_tbl_base; 1551 unsigned int evq_rptr_tbl_base; 1552 u64 max_dma_mask; 1553 unsigned int rx_prefix_size; 1554 unsigned int rx_hash_offset; 1555 unsigned int rx_ts_offset; 1556 unsigned int rx_buffer_padding; 1557 bool can_rx_scatter; 1558 bool always_rx_scatter; 1559 bool option_descriptors; 1560 unsigned int min_interrupt_mode; 1561 unsigned int timer_period_max; 1562 netdev_features_t offload_features; 1563 int mcdi_max_ver; 1564 unsigned int max_rx_ip_filters; 1565 u32 hwtstamp_filters; 1566 unsigned int rx_hash_key_size; 1567 }; 1568 1569 /************************************************************************** 1570 * 1571 * Prototypes and inline functions 1572 * 1573 *************************************************************************/ 1574 1575 static inline struct efx_channel * 1576 efx_get_channel(struct efx_nic *efx, unsigned index) 1577 { 1578 EFX_WARN_ON_ONCE_PARANOID(index >= efx->n_channels); 1579 return efx->channel[index]; 1580 } 1581 1582 /* Iterate over all used channels */ 1583 #define efx_for_each_channel(_channel, _efx) \ 1584 for (_channel = (_efx)->channel[0]; \ 1585 _channel; \ 1586 _channel = (_channel->channel + 1 < (_efx)->n_channels) ? \ 1587 (_efx)->channel[_channel->channel + 1] : NULL) 1588 1589 /* Iterate over all used channels in reverse */ 1590 #define efx_for_each_channel_rev(_channel, _efx) \ 1591 for (_channel = (_efx)->channel[(_efx)->n_channels - 1]; \ 1592 _channel; \ 1593 _channel = _channel->channel ? \ 1594 (_efx)->channel[_channel->channel - 1] : NULL) 1595 1596 static inline struct efx_channel * 1597 efx_get_tx_channel(struct efx_nic *efx, unsigned int index) 1598 { 1599 EFX_WARN_ON_ONCE_PARANOID(index >= efx->n_tx_channels); 1600 return efx->channel[efx->tx_channel_offset + index]; 1601 } 1602 1603 static inline struct efx_channel * 1604 efx_get_xdp_channel(struct efx_nic *efx, unsigned int index) 1605 { 1606 EFX_WARN_ON_ONCE_PARANOID(index >= efx->n_xdp_channels); 1607 return efx->channel[efx->xdp_channel_offset + index]; 1608 } 1609 1610 static inline bool efx_channel_is_xdp_tx(struct efx_channel *channel) 1611 { 1612 return channel->channel - channel->efx->xdp_channel_offset < 1613 channel->efx->n_xdp_channels; 1614 } 1615 1616 static inline bool efx_channel_has_tx_queues(struct efx_channel *channel) 1617 { 1618 return channel && channel->channel >= channel->efx->tx_channel_offset; 1619 } 1620 1621 static inline unsigned int efx_channel_num_tx_queues(struct efx_channel *channel) 1622 { 1623 if (efx_channel_is_xdp_tx(channel)) 1624 return channel->efx->xdp_tx_per_channel; 1625 return channel->efx->tx_queues_per_channel; 1626 } 1627 1628 static inline struct efx_tx_queue * 1629 efx_channel_get_tx_queue(struct efx_channel *channel, unsigned int type) 1630 { 1631 EFX_WARN_ON_ONCE_PARANOID(type >= EFX_TXQ_TYPES); 1632 return channel->tx_queue_by_type[type]; 1633 } 1634 1635 static inline struct efx_tx_queue * 1636 efx_get_tx_queue(struct efx_nic *efx, unsigned int index, unsigned int type) 1637 { 1638 struct efx_channel *channel = efx_get_tx_channel(efx, index); 1639 1640 return efx_channel_get_tx_queue(channel, type); 1641 } 1642 1643 /* Iterate over all TX queues belonging to a channel */ 1644 #define efx_for_each_channel_tx_queue(_tx_queue, _channel) \ 1645 if (!efx_channel_has_tx_queues(_channel)) \ 1646 ; \ 1647 else \ 1648 for (_tx_queue = (_channel)->tx_queue; \ 1649 _tx_queue < (_channel)->tx_queue + \ 1650 efx_channel_num_tx_queues(_channel); \ 1651 _tx_queue++) 1652 1653 static inline bool efx_channel_has_rx_queue(struct efx_channel *channel) 1654 { 1655 return channel->rx_queue.core_index >= 0; 1656 } 1657 1658 static inline struct efx_rx_queue * 1659 efx_channel_get_rx_queue(struct efx_channel *channel) 1660 { 1661 EFX_WARN_ON_ONCE_PARANOID(!efx_channel_has_rx_queue(channel)); 1662 return &channel->rx_queue; 1663 } 1664 1665 /* Iterate over all RX queues belonging to a channel */ 1666 #define efx_for_each_channel_rx_queue(_rx_queue, _channel) \ 1667 if (!efx_channel_has_rx_queue(_channel)) \ 1668 ; \ 1669 else \ 1670 for (_rx_queue = &(_channel)->rx_queue; \ 1671 _rx_queue; \ 1672 _rx_queue = NULL) 1673 1674 static inline struct efx_channel * 1675 efx_rx_queue_channel(struct efx_rx_queue *rx_queue) 1676 { 1677 return container_of(rx_queue, struct efx_channel, rx_queue); 1678 } 1679 1680 static inline int efx_rx_queue_index(struct efx_rx_queue *rx_queue) 1681 { 1682 return efx_rx_queue_channel(rx_queue)->channel; 1683 } 1684 1685 /* Returns a pointer to the specified receive buffer in the RX 1686 * descriptor queue. 1687 */ 1688 static inline struct efx_rx_buffer *efx_rx_buffer(struct efx_rx_queue *rx_queue, 1689 unsigned int index) 1690 { 1691 return &rx_queue->buffer[index]; 1692 } 1693 1694 static inline struct efx_rx_buffer * 1695 efx_rx_buf_next(struct efx_rx_queue *rx_queue, struct efx_rx_buffer *rx_buf) 1696 { 1697 if (unlikely(rx_buf == efx_rx_buffer(rx_queue, rx_queue->ptr_mask))) 1698 return efx_rx_buffer(rx_queue, 0); 1699 else 1700 return rx_buf + 1; 1701 } 1702 1703 /** 1704 * EFX_MAX_FRAME_LEN - calculate maximum frame length 1705 * 1706 * This calculates the maximum frame length that will be used for a 1707 * given MTU. The frame length will be equal to the MTU plus a 1708 * constant amount of header space and padding. This is the quantity 1709 * that the net driver will program into the MAC as the maximum frame 1710 * length. 1711 * 1712 * The 10G MAC requires 8-byte alignment on the frame 1713 * length, so we round up to the nearest 8. 1714 * 1715 * Re-clocking by the XGXS on RX can reduce an IPG to 32 bits (half an 1716 * XGMII cycle). If the frame length reaches the maximum value in the 1717 * same cycle, the XMAC can miss the IPG altogether. We work around 1718 * this by adding a further 16 bytes. 1719 */ 1720 #define EFX_FRAME_PAD 16 1721 #define EFX_MAX_FRAME_LEN(mtu) \ 1722 (ALIGN(((mtu) + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN + EFX_FRAME_PAD), 8)) 1723 1724 static inline bool efx_xmit_with_hwtstamp(struct sk_buff *skb) 1725 { 1726 return skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP; 1727 } 1728 static inline void efx_xmit_hwtstamp_pending(struct sk_buff *skb) 1729 { 1730 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 1731 } 1732 1733 /* Get the max fill level of the TX queues on this channel */ 1734 static inline unsigned int 1735 efx_channel_tx_fill_level(struct efx_channel *channel) 1736 { 1737 struct efx_tx_queue *tx_queue; 1738 unsigned int fill_level = 0; 1739 1740 efx_for_each_channel_tx_queue(tx_queue, channel) 1741 fill_level = max(fill_level, 1742 tx_queue->insert_count - tx_queue->read_count); 1743 1744 return fill_level; 1745 } 1746 1747 /* Conservative approximation of efx_channel_tx_fill_level using cached value */ 1748 static inline unsigned int 1749 efx_channel_tx_old_fill_level(struct efx_channel *channel) 1750 { 1751 struct efx_tx_queue *tx_queue; 1752 unsigned int fill_level = 0; 1753 1754 efx_for_each_channel_tx_queue(tx_queue, channel) 1755 fill_level = max(fill_level, 1756 tx_queue->insert_count - tx_queue->old_read_count); 1757 1758 return fill_level; 1759 } 1760 1761 /* Get all supported features. 1762 * If a feature is not fixed, it is present in hw_features. 1763 * If a feature is fixed, it does not present in hw_features, but 1764 * always in features. 1765 */ 1766 static inline netdev_features_t efx_supported_features(const struct efx_nic *efx) 1767 { 1768 const struct net_device *net_dev = efx->net_dev; 1769 1770 return net_dev->features | net_dev->hw_features; 1771 } 1772 1773 /* Get the current TX queue insert index. */ 1774 static inline unsigned int 1775 efx_tx_queue_get_insert_index(const struct efx_tx_queue *tx_queue) 1776 { 1777 return tx_queue->insert_count & tx_queue->ptr_mask; 1778 } 1779 1780 /* Get a TX buffer. */ 1781 static inline struct efx_tx_buffer * 1782 __efx_tx_queue_get_insert_buffer(const struct efx_tx_queue *tx_queue) 1783 { 1784 return &tx_queue->buffer[efx_tx_queue_get_insert_index(tx_queue)]; 1785 } 1786 1787 /* Get a TX buffer, checking it's not currently in use. */ 1788 static inline struct efx_tx_buffer * 1789 efx_tx_queue_get_insert_buffer(const struct efx_tx_queue *tx_queue) 1790 { 1791 struct efx_tx_buffer *buffer = 1792 __efx_tx_queue_get_insert_buffer(tx_queue); 1793 1794 EFX_WARN_ON_ONCE_PARANOID(buffer->len); 1795 EFX_WARN_ON_ONCE_PARANOID(buffer->flags); 1796 EFX_WARN_ON_ONCE_PARANOID(buffer->unmap_len); 1797 1798 return buffer; 1799 } 1800 1801 #endif /* EFX_NET_DRIVER_H */ 1802