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