PageRenderTime 59ms CodeModel.GetById 15ms app.highlight 33ms RepoModel.GetById 1ms app.codeStats 0ms

/drivers/net/ethernet/sfc/net_driver.h

http://github.com/mirrors/linux
C Header | 1697 lines | 841 code | 130 blank | 726 comment | 22 complexity | 84b39cff33e1c66d7fbfb4d9c345a6d1 MD5 | raw file

Large files files are truncated, but you can click here to view the full file

   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#define EFX_DRIVER_VERSION	"4.1"
  42
  43#ifdef DEBUG
  44#define EFX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x)
  45#define EFX_WARN_ON_PARANOID(x) WARN_ON(x)
  46#else
  47#define EFX_WARN_ON_ONCE_PARANOID(x) do {} while (0)
  48#define EFX_WARN_ON_PARANOID(x) do {} while (0)
  49#endif
  50
  51/**************************************************************************
  52 *
  53 * Efx data structures
  54 *
  55 **************************************************************************/
  56
  57#define EFX_MAX_CHANNELS 32U
  58#define EFX_MAX_RX_QUEUES EFX_MAX_CHANNELS
  59#define EFX_EXTRA_CHANNEL_IOV	0
  60#define EFX_EXTRA_CHANNEL_PTP	1
  61#define EFX_MAX_EXTRA_CHANNELS	2U
  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_OFFLOAD	1	/* flag */
  69#define EFX_TXQ_TYPE_HIGHPRI	2	/* flag */
  70#define EFX_TXQ_TYPES		4
  71#define EFX_MAX_TX_QUEUES	(EFX_TXQ_TYPES * EFX_MAX_CHANNELS)
  72
  73/* Maximum possible MTU the driver supports */
  74#define EFX_MAX_MTU (9 * 1024)
  75
  76/* Minimum MTU, from RFC791 (IP) */
  77#define EFX_MIN_MTU 68
  78
  79/* Size of an RX scatter buffer.  Small enough to pack 2 into a 4K page,
  80 * and should be a multiple of the cache line size.
  81 */
  82#define EFX_RX_USR_BUF_SIZE	(2048 - 256)
  83
  84/* If possible, we should ensure cache line alignment at start and end
  85 * of every buffer.  Otherwise, we just need to ensure 4-byte
  86 * alignment of the network header.
  87 */
  88#if NET_IP_ALIGN == 0
  89#define EFX_RX_BUF_ALIGNMENT	L1_CACHE_BYTES
  90#else
  91#define EFX_RX_BUF_ALIGNMENT	4
  92#endif
  93
  94/* Non-standard XDP_PACKET_HEADROOM and tailroom to satisfy XDP_REDIRECT and
  95 * still fit two standard MTU size packets into a single 4K page.
  96 */
  97#define EFX_XDP_HEADROOM	128
  98#define EFX_XDP_TAILROOM	SKB_DATA_ALIGN(sizeof(struct skb_shared_info))
  99
 100/* Forward declare Precision Time Protocol (PTP) support structure. */
 101struct efx_ptp_data;
 102struct hwtstamp_config;
 103
 104struct efx_self_tests;
 105
 106/**
 107 * struct efx_buffer - A general-purpose DMA buffer
 108 * @addr: host base address of the buffer
 109 * @dma_addr: DMA base address of the buffer
 110 * @len: Buffer length, in bytes
 111 *
 112 * The NIC uses these buffers for its interrupt status registers and
 113 * MAC stats dumps.
 114 */
 115struct efx_buffer {
 116	void *addr;
 117	dma_addr_t dma_addr;
 118	unsigned int len;
 119};
 120
 121/**
 122 * struct efx_special_buffer - DMA buffer entered into buffer table
 123 * @buf: Standard &struct efx_buffer
 124 * @index: Buffer index within controller;s buffer table
 125 * @entries: Number of buffer table entries
 126 *
 127 * The NIC has a buffer table that maps buffers of size %EFX_BUF_SIZE.
 128 * Event and descriptor rings are addressed via one or more buffer
 129 * table entries (and so can be physically non-contiguous, although we
 130 * currently do not take advantage of that).  On Falcon and Siena we
 131 * have to take care of allocating and initialising the entries
 132 * ourselves.  On later hardware this is managed by the firmware and
 133 * @index and @entries are left as 0.
 134 */
 135struct efx_special_buffer {
 136	struct efx_buffer buf;
 137	unsigned int index;
 138	unsigned int entries;
 139};
 140
 141/**
 142 * struct efx_tx_buffer - buffer state for a TX descriptor
 143 * @skb: When @flags & %EFX_TX_BUF_SKB, the associated socket buffer to be
 144 *	freed when descriptor completes
 145 * @xdpf: When @flags & %EFX_TX_BUF_XDP, the XDP frame information; its @data
 146 *	member is the associated buffer to drop a page reference on.
 147 * @option: When @flags & %EFX_TX_BUF_OPTION, an EF10-specific option
 148 *	descriptor.
 149 * @dma_addr: DMA address of the fragment.
 150 * @flags: Flags for allocation and DMA mapping type
 151 * @len: Length of this fragment.
 152 *	This field is zero when the queue slot is empty.
 153 * @unmap_len: Length of this fragment to unmap
 154 * @dma_offset: Offset of @dma_addr from the address of the backing DMA mapping.
 155 * Only valid if @unmap_len != 0.
 156 */
 157struct efx_tx_buffer {
 158	union {
 159		const struct sk_buff *skb;
 160		struct xdp_frame *xdpf;
 161	};
 162	union {
 163		efx_qword_t option;    /* EF10 */
 164		dma_addr_t dma_addr;
 165	};
 166	unsigned short flags;
 167	unsigned short len;
 168	unsigned short unmap_len;
 169	unsigned short dma_offset;
 170};
 171#define EFX_TX_BUF_CONT		1	/* not last descriptor of packet */
 172#define EFX_TX_BUF_SKB		2	/* buffer is last part of skb */
 173#define EFX_TX_BUF_MAP_SINGLE	8	/* buffer was mapped with dma_map_single() */
 174#define EFX_TX_BUF_OPTION	0x10	/* empty buffer for option descriptor */
 175#define EFX_TX_BUF_XDP		0x20	/* buffer was sent with XDP */
 176
 177/**
 178 * struct efx_tx_queue - An Efx TX queue
 179 *
 180 * This is a ring buffer of TX fragments.
 181 * Since the TX completion path always executes on the same
 182 * CPU and the xmit path can operate on different CPUs,
 183 * performance is increased by ensuring that the completion
 184 * path and the xmit path operate on different cache lines.
 185 * This is particularly important if the xmit path is always
 186 * executing on one CPU which is different from the completion
 187 * path.  There is also a cache line for members which are
 188 * read but not written on the fast path.
 189 *
 190 * @efx: The associated Efx NIC
 191 * @queue: DMA queue number
 192 * @tso_version: Version of TSO in use for this queue.
 193 * @channel: The associated channel
 194 * @core_txq: The networking core TX queue structure
 195 * @buffer: The software buffer ring
 196 * @cb_page: Array of pages of copy buffers.  Carved up according to
 197 *	%EFX_TX_CB_ORDER into %EFX_TX_CB_SIZE-sized chunks.
 198 * @txd: The hardware descriptor ring
 199 * @ptr_mask: The size of the ring minus 1.
 200 * @piobuf: PIO buffer region for this TX queue (shared with its partner).
 201 *	Size of the region is efx_piobuf_size.
 202 * @piobuf_offset: Buffer offset to be specified in PIO descriptors
 203 * @initialised: Has hardware queue been initialised?
 204 * @timestamping: Is timestamping enabled for this channel?
 205 * @xdp_tx: Is this an XDP tx queue?
 206 * @handle_tso: TSO xmit preparation handler.  Sets up the TSO metadata and
 207 *	may also map tx data, depending on the nature of the TSO implementation.
 208 * @read_count: Current read pointer.
 209 *	This is the number of buffers that have been removed from both rings.
 210 * @old_write_count: The value of @write_count when last checked.
 211 *	This is here for performance reasons.  The xmit path will
 212 *	only get the up-to-date value of @write_count if this
 213 *	variable indicates that the queue is empty.  This is to
 214 *	avoid cache-line ping-pong between the xmit path and the
 215 *	completion path.
 216 * @merge_events: Number of TX merged completion events
 217 * @completed_timestamp_major: Top part of the most recent tx timestamp.
 218 * @completed_timestamp_minor: Low part of the most recent tx timestamp.
 219 * @insert_count: Current insert pointer
 220 *	This is the number of buffers that have been added to the
 221 *	software ring.
 222 * @write_count: Current write pointer
 223 *	This is the number of buffers that have been added to the
 224 *	hardware ring.
 225 * @packet_write_count: Completable write pointer
 226 *	This is the write pointer of the last packet written.
 227 *	Normally this will equal @write_count, but as option descriptors
 228 *	don't produce completion events, they won't update this.
 229 *	Filled in iff @efx->type->option_descriptors; only used for PIO.
 230 *	Thus, this is written and used on EF10, and neither on farch.
 231 * @old_read_count: The value of read_count when last checked.
 232 *	This is here for performance reasons.  The xmit path will
 233 *	only get the up-to-date value of read_count if this
 234 *	variable indicates that the queue is full.  This is to
 235 *	avoid cache-line ping-pong between the xmit path and the
 236 *	completion path.
 237 * @tso_bursts: Number of times TSO xmit invoked by kernel
 238 * @tso_long_headers: Number of packets with headers too long for standard
 239 *	blocks
 240 * @tso_packets: Number of packets via the TSO xmit path
 241 * @tso_fallbacks: Number of times TSO fallback used
 242 * @pushes: Number of times the TX push feature has been used
 243 * @pio_packets: Number of times the TX PIO feature has been used
 244 * @xmit_more_available: Are any packets waiting to be pushed to the NIC
 245 * @cb_packets: Number of times the TX copybreak feature has been used
 246 * @empty_read_count: If the completion path has seen the queue as empty
 247 *	and the transmission path has not yet checked this, the value of
 248 *	@read_count bitwise-added to %EFX_EMPTY_COUNT_VALID; otherwise 0.
 249 */
 250struct efx_tx_queue {
 251	/* Members which don't change on the fast path */
 252	struct efx_nic *efx ____cacheline_aligned_in_smp;
 253	unsigned queue;
 254	unsigned int tso_version;
 255	struct efx_channel *channel;
 256	struct netdev_queue *core_txq;
 257	struct efx_tx_buffer *buffer;
 258	struct efx_buffer *cb_page;
 259	struct efx_special_buffer txd;
 260	unsigned int ptr_mask;
 261	void __iomem *piobuf;
 262	unsigned int piobuf_offset;
 263	bool initialised;
 264	bool timestamping;
 265	bool xdp_tx;
 266
 267	/* Function pointers used in the fast path. */
 268	int (*handle_tso)(struct efx_tx_queue*, struct sk_buff*, bool *);
 269
 270	/* Members used mainly on the completion path */
 271	unsigned int read_count ____cacheline_aligned_in_smp;
 272	unsigned int old_write_count;
 273	unsigned int merge_events;
 274	unsigned int bytes_compl;
 275	unsigned int pkts_compl;
 276	u32 completed_timestamp_major;
 277	u32 completed_timestamp_minor;
 278
 279	/* Members used only on the xmit path */
 280	unsigned int insert_count ____cacheline_aligned_in_smp;
 281	unsigned int write_count;
 282	unsigned int packet_write_count;
 283	unsigned int old_read_count;
 284	unsigned int tso_bursts;
 285	unsigned int tso_long_headers;
 286	unsigned int tso_packets;
 287	unsigned int tso_fallbacks;
 288	unsigned int pushes;
 289	unsigned int pio_packets;
 290	bool xmit_more_available;
 291	unsigned int cb_packets;
 292	/* Statistics to supplement MAC stats */
 293	unsigned long tx_packets;
 294
 295	/* Members shared between paths and sometimes updated */
 296	unsigned int empty_read_count ____cacheline_aligned_in_smp;
 297#define EFX_EMPTY_COUNT_VALID 0x80000000
 298	atomic_t flush_outstanding;
 299};
 300
 301#define EFX_TX_CB_ORDER	7
 302#define EFX_TX_CB_SIZE	(1 << EFX_TX_CB_ORDER) - NET_IP_ALIGN
 303
 304/**
 305 * struct efx_rx_buffer - An Efx RX data buffer
 306 * @dma_addr: DMA base address of the buffer
 307 * @page: The associated page buffer.
 308 *	Will be %NULL if the buffer slot is currently free.
 309 * @page_offset: If pending: offset in @page of DMA base address.
 310 *	If completed: offset in @page of Ethernet header.
 311 * @len: If pending: length for DMA descriptor.
 312 *	If completed: received length, excluding hash prefix.
 313 * @flags: Flags for buffer and packet state.  These are only set on the
 314 *	first buffer of a scattered packet.
 315 */
 316struct efx_rx_buffer {
 317	dma_addr_t dma_addr;
 318	struct page *page;
 319	u16 page_offset;
 320	u16 len;
 321	u16 flags;
 322};
 323#define EFX_RX_BUF_LAST_IN_PAGE	0x0001
 324#define EFX_RX_PKT_CSUMMED	0x0002
 325#define EFX_RX_PKT_DISCARD	0x0004
 326#define EFX_RX_PKT_TCP		0x0040
 327#define EFX_RX_PKT_PREFIX_LEN	0x0080	/* length is in prefix only */
 328#define EFX_RX_PKT_CSUM_LEVEL	0x0200
 329
 330/**
 331 * struct efx_rx_page_state - Page-based rx buffer state
 332 *
 333 * Inserted at the start of every page allocated for receive buffers.
 334 * Used to facilitate sharing dma mappings between recycled rx buffers
 335 * and those passed up to the kernel.
 336 *
 337 * @dma_addr: The dma address of this page.
 338 */
 339struct efx_rx_page_state {
 340	dma_addr_t dma_addr;
 341
 342	unsigned int __pad[] ____cacheline_aligned;
 343};
 344
 345/**
 346 * struct efx_rx_queue - An Efx RX queue
 347 * @efx: The associated Efx NIC
 348 * @core_index:  Index of network core RX queue.  Will be >= 0 iff this
 349 *	is associated with a real RX queue.
 350 * @buffer: The software buffer ring
 351 * @rxd: The hardware descriptor ring
 352 * @ptr_mask: The size of the ring minus 1.
 353 * @refill_enabled: Enable refill whenever fill level is low
 354 * @flush_pending: Set when a RX flush is pending. Has the same lifetime as
 355 *	@rxq_flush_pending.
 356 * @added_count: Number of buffers added to the receive queue.
 357 * @notified_count: Number of buffers given to NIC (<= @added_count).
 358 * @removed_count: Number of buffers removed from the receive queue.
 359 * @scatter_n: Used by NIC specific receive code.
 360 * @scatter_len: Used by NIC specific receive code.
 361 * @page_ring: The ring to store DMA mapped pages for reuse.
 362 * @page_add: Counter to calculate the write pointer for the recycle ring.
 363 * @page_remove: Counter to calculate the read pointer for the recycle ring.
 364 * @page_recycle_count: The number of pages that have been recycled.
 365 * @page_recycle_failed: The number of pages that couldn't be recycled because
 366 *      the kernel still held a reference to them.
 367 * @page_recycle_full: The number of pages that were released because the
 368 *      recycle ring was full.
 369 * @page_ptr_mask: The number of pages in the RX recycle ring minus 1.
 370 * @max_fill: RX descriptor maximum fill level (<= ring size)
 371 * @fast_fill_trigger: RX descriptor fill level that will trigger a fast fill
 372 *	(<= @max_fill)
 373 * @min_fill: RX descriptor minimum non-zero fill level.
 374 *	This records the minimum fill level observed when a ring
 375 *	refill was triggered.
 376 * @recycle_count: RX buffer recycle counter.
 377 * @slow_fill: Timer used to defer efx_nic_generate_fill_event().
 378 * @xdp_rxq_info: XDP specific RX queue information.
 379 * @xdp_rxq_info_valid: Is xdp_rxq_info valid data?.
 380 */
 381struct efx_rx_queue {
 382	struct efx_nic *efx;
 383	int core_index;
 384	struct efx_rx_buffer *buffer;
 385	struct efx_special_buffer rxd;
 386	unsigned int ptr_mask;
 387	bool refill_enabled;
 388	bool flush_pending;
 389
 390	unsigned int added_count;
 391	unsigned int notified_count;
 392	unsigned int removed_count;
 393	unsigned int scatter_n;
 394	unsigned int scatter_len;
 395	struct page **page_ring;
 396	unsigned int page_add;
 397	unsigned int page_remove;
 398	unsigned int page_recycle_count;
 399	unsigned int page_recycle_failed;
 400	unsigned int page_recycle_full;
 401	unsigned int page_ptr_mask;
 402	unsigned int max_fill;
 403	unsigned int fast_fill_trigger;
 404	unsigned int min_fill;
 405	unsigned int min_overfill;
 406	unsigned int recycle_count;
 407	struct timer_list slow_fill;
 408	unsigned int slow_fill_count;
 409	/* Statistics to supplement MAC stats */
 410	unsigned long rx_packets;
 411	struct xdp_rxq_info xdp_rxq_info;
 412	bool xdp_rxq_info_valid;
 413};
 414
 415enum efx_sync_events_state {
 416	SYNC_EVENTS_DISABLED = 0,
 417	SYNC_EVENTS_QUIESCENT,
 418	SYNC_EVENTS_REQUESTED,
 419	SYNC_EVENTS_VALID,
 420};
 421
 422/**
 423 * struct efx_channel - An Efx channel
 424 *
 425 * A channel comprises an event queue, at least one TX queue, at least
 426 * one RX queue, and an associated tasklet for processing the event
 427 * queue.
 428 *
 429 * @efx: Associated Efx NIC
 430 * @channel: Channel instance number
 431 * @type: Channel type definition
 432 * @eventq_init: Event queue initialised flag
 433 * @enabled: Channel enabled indicator
 434 * @irq: IRQ number (MSI and MSI-X only)
 435 * @irq_moderation_us: IRQ moderation value (in microseconds)
 436 * @napi_dev: Net device used with NAPI
 437 * @napi_str: NAPI control structure
 438 * @state: state for NAPI vs busy polling
 439 * @state_lock: lock protecting @state
 440 * @eventq: Event queue buffer
 441 * @eventq_mask: Event queue pointer mask
 442 * @eventq_read_ptr: Event queue read pointer
 443 * @event_test_cpu: Last CPU to handle interrupt or test event for this channel
 444 * @irq_count: Number of IRQs since last adaptive moderation decision
 445 * @irq_mod_score: IRQ moderation score
 446 * @rfs_filter_count: number of accelerated RFS filters currently in place;
 447 *	equals the count of @rps_flow_id slots filled
 448 * @rfs_last_expiry: value of jiffies last time some accelerated RFS filters
 449 *	were checked for expiry
 450 * @rfs_expire_index: next accelerated RFS filter ID to check for expiry
 451 * @n_rfs_succeeded: number of successful accelerated RFS filter insertions
 452 * @n_rfs_failed; number of failed accelerated RFS filter insertions
 453 * @filter_work: Work item for efx_filter_rfs_expire()
 454 * @rps_flow_id: Flow IDs of filters allocated for accelerated RFS,
 455 *      indexed by filter ID
 456 * @n_rx_tobe_disc: Count of RX_TOBE_DISC errors
 457 * @n_rx_ip_hdr_chksum_err: Count of RX IP header checksum errors
 458 * @n_rx_tcp_udp_chksum_err: Count of RX TCP and UDP checksum errors
 459 * @n_rx_mcast_mismatch: Count of unmatched multicast frames
 460 * @n_rx_frm_trunc: Count of RX_FRM_TRUNC errors
 461 * @n_rx_overlength: Count of RX_OVERLENGTH errors
 462 * @n_skbuff_leaks: Count of skbuffs leaked due to RX overrun
 463 * @n_rx_nodesc_trunc: Number of RX packets truncated and then dropped due to
 464 *	lack of descriptors
 465 * @n_rx_merge_events: Number of RX merged completion events
 466 * @n_rx_merge_packets: Number of RX packets completed by merged events
 467 * @n_rx_xdp_drops: Count of RX packets intentionally dropped due to XDP
 468 * @n_rx_xdp_bad_drops: Count of RX packets dropped due to XDP errors
 469 * @n_rx_xdp_tx: Count of RX packets retransmitted due to XDP
 470 * @n_rx_xdp_redirect: Count of RX packets redirected to a different NIC by XDP
 471 * @rx_pkt_n_frags: Number of fragments in next packet to be delivered by
 472 *	__efx_rx_packet(), or zero if there is none
 473 * @rx_pkt_index: Ring index of first buffer for next packet to be delivered
 474 *	by __efx_rx_packet(), if @rx_pkt_n_frags != 0
 475 * @rx_list: list of SKBs from current RX, awaiting processing
 476 * @rx_queue: RX queue for this channel
 477 * @tx_queue: TX queues for this channel
 478 * @sync_events_state: Current state of sync events on this channel
 479 * @sync_timestamp_major: Major part of the last ptp sync event
 480 * @sync_timestamp_minor: Minor part of the last ptp sync event
 481 */
 482struct efx_channel {
 483	struct efx_nic *efx;
 484	int channel;
 485	const struct efx_channel_type *type;
 486	bool eventq_init;
 487	bool enabled;
 488	int irq;
 489	unsigned int irq_moderation_us;
 490	struct net_device *napi_dev;
 491	struct napi_struct napi_str;
 492#ifdef CONFIG_NET_RX_BUSY_POLL
 493	unsigned long busy_poll_state;
 494#endif
 495	struct efx_special_buffer eventq;
 496	unsigned int eventq_mask;
 497	unsigned int eventq_read_ptr;
 498	int event_test_cpu;
 499
 500	unsigned int irq_count;
 501	unsigned int irq_mod_score;
 502#ifdef CONFIG_RFS_ACCEL
 503	unsigned int rfs_filter_count;
 504	unsigned int rfs_last_expiry;
 505	unsigned int rfs_expire_index;
 506	unsigned int n_rfs_succeeded;
 507	unsigned int n_rfs_failed;
 508	struct delayed_work filter_work;
 509#define RPS_FLOW_ID_INVALID 0xFFFFFFFF
 510	u32 *rps_flow_id;
 511#endif
 512
 513	unsigned int n_rx_tobe_disc;
 514	unsigned int n_rx_ip_hdr_chksum_err;
 515	unsigned int n_rx_tcp_udp_chksum_err;
 516	unsigned int n_rx_outer_ip_hdr_chksum_err;
 517	unsigned int n_rx_outer_tcp_udp_chksum_err;
 518	unsigned int n_rx_inner_ip_hdr_chksum_err;
 519	unsigned int n_rx_inner_tcp_udp_chksum_err;
 520	unsigned int n_rx_eth_crc_err;
 521	unsigned int n_rx_mcast_mismatch;
 522	unsigned int n_rx_frm_trunc;
 523	unsigned int n_rx_overlength;
 524	unsigned int n_skbuff_leaks;
 525	unsigned int n_rx_nodesc_trunc;
 526	unsigned int n_rx_merge_events;
 527	unsigned int n_rx_merge_packets;
 528	unsigned int n_rx_xdp_drops;
 529	unsigned int n_rx_xdp_bad_drops;
 530	unsigned int n_rx_xdp_tx;
 531	unsigned int n_rx_xdp_redirect;
 532
 533	unsigned int rx_pkt_n_frags;
 534	unsigned int rx_pkt_index;
 535
 536	struct list_head *rx_list;
 537
 538	struct efx_rx_queue rx_queue;
 539	struct efx_tx_queue tx_queue[EFX_TXQ_TYPES];
 540
 541	enum efx_sync_events_state sync_events_state;
 542	u32 sync_timestamp_major;
 543	u32 sync_timestamp_minor;
 544};
 545
 546/**
 547 * struct efx_msi_context - Context for each MSI
 548 * @efx: The associated NIC
 549 * @index: Index of the channel/IRQ
 550 * @name: Name of the channel/IRQ
 551 *
 552 * Unlike &struct efx_channel, this is never reallocated and is always
 553 * safe for the IRQ handler to access.
 554 */
 555struct efx_msi_context {
 556	struct efx_nic *efx;
 557	unsigned int index;
 558	char name[IFNAMSIZ + 6];
 559};
 560
 561/**
 562 * struct efx_channel_type - distinguishes traffic and extra channels
 563 * @handle_no_channel: Handle failure to allocate an extra channel
 564 * @pre_probe: Set up extra state prior to initialisation
 565 * @post_remove: Tear down extra state after finalisation, if allocated.
 566 *	May be called on channels that have not been probed.
 567 * @get_name: Generate the channel's name (used for its IRQ handler)
 568 * @copy: Copy the channel state prior to reallocation.  May be %NULL if
 569 *	reallocation is not supported.
 570 * @receive_skb: Handle an skb ready to be passed to netif_receive_skb()
 571 * @want_txqs: Determine whether this channel should have TX queues
 572 *	created.  If %NULL, TX queues are not created.
 573 * @keep_eventq: Flag for whether event queue should be kept initialised
 574 *	while the device is stopped
 575 * @want_pio: Flag for whether PIO buffers should be linked to this
 576 *	channel's TX queues.
 577 */
 578struct efx_channel_type {
 579	void (*handle_no_channel)(struct efx_nic *);
 580	int (*pre_probe)(struct efx_channel *);
 581	void (*post_remove)(struct efx_channel *);
 582	void (*get_name)(struct efx_channel *, char *buf, size_t len);
 583	struct efx_channel *(*copy)(const struct efx_channel *);
 584	bool (*receive_skb)(struct efx_channel *, struct sk_buff *);
 585	bool (*want_txqs)(struct efx_channel *);
 586	bool keep_eventq;
 587	bool want_pio;
 588};
 589
 590enum efx_led_mode {
 591	EFX_LED_OFF	= 0,
 592	EFX_LED_ON	= 1,
 593	EFX_LED_DEFAULT	= 2
 594};
 595
 596#define STRING_TABLE_LOOKUP(val, member) \
 597	((val) < member ## _max) ? member ## _names[val] : "(invalid)"
 598
 599extern const char *const efx_loopback_mode_names[];
 600extern const unsigned int efx_loopback_mode_max;
 601#define LOOPBACK_MODE(efx) \
 602	STRING_TABLE_LOOKUP((efx)->loopback_mode, efx_loopback_mode)
 603
 604extern const char *const efx_reset_type_names[];
 605extern const unsigned int efx_reset_type_max;
 606#define RESET_TYPE(type) \
 607	STRING_TABLE_LOOKUP(type, efx_reset_type)
 608
 609void efx_get_udp_tunnel_type_name(u16 type, char *buf, size_t buflen);
 610
 611enum efx_int_mode {
 612	/* Be careful if altering to correct macro below */
 613	EFX_INT_MODE_MSIX = 0,
 614	EFX_INT_MODE_MSI = 1,
 615	EFX_INT_MODE_LEGACY = 2,
 616	EFX_INT_MODE_MAX	/* Insert any new items before this */
 617};
 618#define EFX_INT_MODE_USE_MSI(x) (((x)->interrupt_mode) <= EFX_INT_MODE_MSI)
 619
 620enum nic_state {
 621	STATE_UNINIT = 0,	/* device being probed/removed or is frozen */
 622	STATE_READY = 1,	/* hardware ready and netdev registered */
 623	STATE_DISABLED = 2,	/* device disabled due to hardware errors */
 624	STATE_RECOVERY = 3,	/* device recovering from PCI error */
 625};
 626
 627/* Forward declaration */
 628struct efx_nic;
 629
 630/* Pseudo bit-mask flow control field */
 631#define EFX_FC_RX	FLOW_CTRL_RX
 632#define EFX_FC_TX	FLOW_CTRL_TX
 633#define EFX_FC_AUTO	4
 634
 635/**
 636 * struct efx_link_state - Current state of the link
 637 * @up: Link is up
 638 * @fd: Link is full-duplex
 639 * @fc: Actual flow control flags
 640 * @speed: Link speed (Mbps)
 641 */
 642struct efx_link_state {
 643	bool up;
 644	bool fd;
 645	u8 fc;
 646	unsigned int speed;
 647};
 648
 649static inline bool efx_link_state_equal(const struct efx_link_state *left,
 650					const struct efx_link_state *right)
 651{
 652	return left->up == right->up && left->fd == right->fd &&
 653		left->fc == right->fc && left->speed == right->speed;
 654}
 655
 656/**
 657 * struct efx_phy_operations - Efx PHY operations table
 658 * @probe: Probe PHY and initialise efx->mdio.mode_support, efx->mdio.mmds,
 659 *	efx->loopback_modes.
 660 * @init: Initialise PHY
 661 * @fini: Shut down PHY
 662 * @reconfigure: Reconfigure PHY (e.g. for new link parameters)
 663 * @poll: Update @link_state and report whether it changed.
 664 *	Serialised by the mac_lock.
 665 * @get_link_ksettings: Get ethtool settings. Serialised by the mac_lock.
 666 * @set_link_ksettings: Set ethtool settings. Serialised by the mac_lock.
 667 * @get_fecparam: Get Forward Error Correction settings. Serialised by mac_lock.
 668 * @set_fecparam: Set Forward Error Correction settings. Serialised by mac_lock.
 669 * @set_npage_adv: Set abilities advertised in (Extended) Next Page
 670 *	(only needed where AN bit is set in mmds)
 671 * @test_alive: Test that PHY is 'alive' (online)
 672 * @test_name: Get the name of a PHY-specific test/result
 673 * @run_tests: Run tests and record results as appropriate (offline).
 674 *	Flags are the ethtool tests flags.
 675 */
 676struct efx_phy_operations {
 677	int (*probe) (struct efx_nic *efx);
 678	int (*init) (struct efx_nic *efx);
 679	void (*fini) (struct efx_nic *efx);
 680	void (*remove) (struct efx_nic *efx);
 681	int (*reconfigure) (struct efx_nic *efx);
 682	bool (*poll) (struct efx_nic *efx);
 683	void (*get_link_ksettings)(struct efx_nic *efx,
 684				   struct ethtool_link_ksettings *cmd);
 685	int (*set_link_ksettings)(struct efx_nic *efx,
 686				  const struct ethtool_link_ksettings *cmd);
 687	int (*get_fecparam)(struct efx_nic *efx, struct ethtool_fecparam *fec);
 688	int (*set_fecparam)(struct efx_nic *efx,
 689			    const struct ethtool_fecparam *fec);
 690	void (*set_npage_adv) (struct efx_nic *efx, u32);
 691	int (*test_alive) (struct efx_nic *efx);
 692	const char *(*test_name) (struct efx_nic *efx, unsigned int index);
 693	int (*run_tests) (struct efx_nic *efx, int *results, unsigned flags);
 694	int (*get_module_eeprom) (struct efx_nic *efx,
 695			       struct ethtool_eeprom *ee,
 696			       u8 *data);
 697	int (*get_module_info) (struct efx_nic *efx,
 698				struct ethtool_modinfo *modinfo);
 699};
 700
 701/**
 702 * enum efx_phy_mode - PHY operating mode flags
 703 * @PHY_MODE_NORMAL: on and should pass traffic
 704 * @PHY_MODE_TX_DISABLED: on with TX disabled
 705 * @PHY_MODE_LOW_POWER: set to low power through MDIO
 706 * @PHY_MODE_OFF: switched off through external control
 707 * @PHY_MODE_SPECIAL: on but will not pass traffic
 708 */
 709enum efx_phy_mode {
 710	PHY_MODE_NORMAL		= 0,
 711	PHY_MODE_TX_DISABLED	= 1,
 712	PHY_MODE_LOW_POWER	= 2,
 713	PHY_MODE_OFF		= 4,
 714	PHY_MODE_SPECIAL	= 8,
 715};
 716
 717static inline bool efx_phy_mode_disabled(enum efx_phy_mode mode)
 718{
 719	return !!(mode & ~PHY_MODE_TX_DISABLED);
 720}
 721
 722/**
 723 * struct efx_hw_stat_desc - Description of a hardware statistic
 724 * @name: Name of the statistic as visible through ethtool, or %NULL if
 725 *	it should not be exposed
 726 * @dma_width: Width in bits (0 for non-DMA statistics)
 727 * @offset: Offset within stats (ignored for non-DMA statistics)
 728 */
 729struct efx_hw_stat_desc {
 730	const char *name;
 731	u16 dma_width;
 732	u16 offset;
 733};
 734
 735/* Number of bits used in a multicast filter hash address */
 736#define EFX_MCAST_HASH_BITS 8
 737
 738/* Number of (single-bit) entries in a multicast filter hash */
 739#define EFX_MCAST_HASH_ENTRIES (1 << EFX_MCAST_HASH_BITS)
 740
 741/* An Efx multicast filter hash */
 742union efx_multicast_hash {
 743	u8 byte[EFX_MCAST_HASH_ENTRIES / 8];
 744	efx_oword_t oword[EFX_MCAST_HASH_ENTRIES / sizeof(efx_oword_t) / 8];
 745};
 746
 747struct vfdi_status;
 748
 749/* The reserved RSS context value */
 750#define EFX_MCDI_RSS_CONTEXT_INVALID	0xffffffff
 751/**
 752 * struct efx_rss_context - A user-defined RSS context for filtering
 753 * @list: node of linked list on which this struct is stored
 754 * @context_id: the RSS_CONTEXT_ID returned by MC firmware, or
 755 *	%EFX_MCDI_RSS_CONTEXT_INVALID if this context is not present on the NIC.
 756 *	For Siena, 0 if RSS is active, else %EFX_MCDI_RSS_CONTEXT_INVALID.
 757 * @user_id: the rss_context ID exposed to userspace over ethtool.
 758 * @rx_hash_udp_4tuple: UDP 4-tuple hashing enabled
 759 * @rx_hash_key: Toeplitz hash key for this RSS context
 760 * @indir_table: Indirection table for this RSS context
 761 */
 762struct efx_rss_context {
 763	struct list_head list;
 764	u32 context_id;
 765	u32 user_id;
 766	bool rx_hash_udp_4tuple;
 767	u8 rx_hash_key[40];
 768	u32 rx_indir_table[128];
 769};
 770
 771#ifdef CONFIG_RFS_ACCEL
 772/* Order of these is important, since filter_id >= %EFX_ARFS_FILTER_ID_PENDING
 773 * is used to test if filter does or will exist.
 774 */
 775#define EFX_ARFS_FILTER_ID_PENDING	-1
 776#define EFX_ARFS_FILTER_ID_ERROR	-2
 777#define EFX_ARFS_FILTER_ID_REMOVING	-3
 778/**
 779 * struct efx_arfs_rule - record of an ARFS filter and its IDs
 780 * @node: linkage into hash table
 781 * @spec: details of the filter (used as key for hash table).  Use efx->type to
 782 *	determine which member to use.
 783 * @rxq_index: channel to which the filter will steer traffic.
 784 * @arfs_id: filter ID which was returned to ARFS
 785 * @filter_id: index in software filter table.  May be
 786 *	%EFX_ARFS_FILTER_ID_PENDING if filter was not inserted yet,
 787 *	%EFX_ARFS_FILTER_ID_ERROR if filter insertion failed, or
 788 *	%EFX_ARFS_FILTER_ID_REMOVING if expiry is currently removing the filter.
 789 */
 790struct efx_arfs_rule {
 791	struct hlist_node node;
 792	struct efx_filter_spec spec;
 793	u16 rxq_index;
 794	u16 arfs_id;
 795	s32 filter_id;
 796};
 797
 798/* Size chosen so that the table is one page (4kB) */
 799#define EFX_ARFS_HASH_TABLE_SIZE	512
 800
 801/**
 802 * struct efx_async_filter_insertion - Request to asynchronously insert a filter
 803 * @net_dev: Reference to the netdevice
 804 * @spec: The filter to insert
 805 * @work: Workitem for this request
 806 * @rxq_index: Identifies the channel for which this request was made
 807 * @flow_id: Identifies the kernel-side flow for which this request was made
 808 */
 809struct efx_async_filter_insertion {
 810	struct net_device *net_dev;
 811	struct efx_filter_spec spec;
 812	struct work_struct work;
 813	u16 rxq_index;
 814	u32 flow_id;
 815};
 816
 817/* Maximum number of ARFS workitems that may be in flight on an efx_nic */
 818#define EFX_RPS_MAX_IN_FLIGHT	8
 819#endif /* CONFIG_RFS_ACCEL */
 820
 821/**
 822 * struct efx_nic - an Efx NIC
 823 * @name: Device name (net device name or bus id before net device registered)
 824 * @pci_dev: The PCI device
 825 * @node: List node for maintaning primary/secondary function lists
 826 * @primary: &struct efx_nic instance for the primary function of this
 827 *	controller.  May be the same structure, and may be %NULL if no
 828 *	primary function is bound.  Serialised by rtnl_lock.
 829 * @secondary_list: List of &struct efx_nic instances for the secondary PCI
 830 *	functions of the controller, if this is for the primary function.
 831 *	Serialised by rtnl_lock.
 832 * @type: Controller type attributes
 833 * @legacy_irq: IRQ number
 834 * @workqueue: Workqueue for port reconfigures and the HW monitor.
 835 *	Work items do not hold and must not acquire RTNL.
 836 * @workqueue_name: Name of workqueue
 837 * @reset_work: Scheduled reset workitem
 838 * @membase_phys: Memory BAR value as physical address
 839 * @membase: Memory BAR value
 840 * @vi_stride: step between per-VI registers / memory regions
 841 * @interrupt_mode: Interrupt mode
 842 * @timer_quantum_ns: Interrupt timer quantum, in nanoseconds
 843 * @timer_max_ns: Interrupt timer maximum value, in nanoseconds
 844 * @irq_rx_adaptive: Adaptive IRQ moderation enabled for RX event queues
 845 * @irq_rx_mod_step_us: Step size for IRQ moderation for RX event queues
 846 * @irq_rx_moderation_us: IRQ moderation time for RX event queues
 847 * @msg_enable: Log message enable flags
 848 * @state: Device state number (%STATE_*). Serialised by the rtnl_lock.
 849 * @reset_pending: Bitmask for pending resets
 850 * @tx_queue: TX DMA queues
 851 * @rx_queue: RX DMA queues
 852 * @channel: Channels
 853 * @msi_context: Context for each MSI
 854 * @extra_channel_types: Types of extra (non-traffic) channels that
 855 *	should be allocated for this NIC
 856 * @xdp_tx_queue_count: Number of entries in %xdp_tx_queues.
 857 * @xdp_tx_queues: Array of pointers to tx queues used for XDP transmit.
 858 * @rxq_entries: Size of receive queues requested by user.
 859 * @txq_entries: Size of transmit queues requested by user.
 860 * @txq_stop_thresh: TX queue fill level at or above which we stop it.
 861 * @txq_wake_thresh: TX queue fill level at or below which we wake it.
 862 * @tx_dc_base: Base qword address in SRAM of TX queue descriptor caches
 863 * @rx_dc_base: Base qword address in SRAM of RX queue descriptor caches
 864 * @sram_lim_qw: Qword address limit of SRAM
 865 * @next_buffer_table: First available buffer table id
 866 * @n_channels: Number of channels in use
 867 * @n_rx_channels: Number of channels used for RX (= number of RX queues)
 868 * @n_tx_channels: Number of channels used for TX
 869 * @n_extra_tx_channels: Number of extra channels with TX queues
 870 * @n_xdp_channels: Number of channels used for XDP TX
 871 * @xdp_channel_offset: Offset of zeroth channel used for XPD TX.
 872 * @xdp_tx_per_channel: Max number of TX queues on an XDP TX channel.
 873 * @rx_ip_align: RX DMA address offset to have IP header aligned in
 874 *	in accordance with NET_IP_ALIGN
 875 * @rx_dma_len: Current maximum RX DMA length
 876 * @rx_buffer_order: Order (log2) of number of pages for each RX buffer
 877 * @rx_buffer_truesize: Amortised allocation size of an RX buffer,
 878 *	for use in sk_buff::truesize
 879 * @rx_prefix_size: Size of RX prefix before packet data
 880 * @rx_packet_hash_offset: Offset of RX flow hash from start of packet data
 881 *	(valid only if @rx_prefix_size != 0; always negative)
 882 * @rx_packet_len_offset: Offset of RX packet length from start of packet data
 883 *	(valid only for NICs that set %EFX_RX_PKT_PREFIX_LEN; always negative)
 884 * @rx_packet_ts_offset: Offset of timestamp from start of packet data
 885 *	(valid only if channel->sync_timestamps_enabled; always negative)
 886 * @rx_scatter: Scatter mode enabled for receives
 887 * @rss_context: Main RSS context.  Its @list member is the head of the list of
 888 *	RSS contexts created by user requests
 889 * @rss_lock: Protects custom RSS context software state in @rss_context.list
 890 * @int_error_count: Number of internal errors seen recently
 891 * @int_error_expire: Time at which error count will be expired
 892 * @irq_soft_enabled: Are IRQs soft-enabled? If not, IRQ handler will
 893 *	acknowledge but do nothing else.
 894 * @irq_status: Interrupt status buffer
 895 * @irq_zero_count: Number of legacy IRQs seen with queue flags == 0
 896 * @irq_level: IRQ level/index for IRQs not triggered by an event queue
 897 * @selftest_work: Work item for asynchronous self-test
 898 * @mtd_list: List of MTDs attached to the NIC
 899 * @nic_data: Hardware dependent state
 900 * @mcdi: Management-Controller-to-Driver Interface state
 901 * @mac_lock: MAC access lock. Protects @port_enabled, @phy_mode,
 902 *	efx_monitor() and efx_reconfigure_port()
 903 * @port_enabled: Port enabled indicator.
 904 *	Serialises efx_stop_all(), efx_start_all(), efx_monitor() and
 905 *	efx_mac_work() with kernel interfaces. Safe to read under any
 906 *	one of the rtnl_lock, mac_lock, or netif_tx_lock, but all three must
 907 *	be held to modify it.
 908 * @port_initialized: Port initialized?
 909 * @net_dev: Operating system network device. Consider holding the rtnl lock
 910 * @fixed_features: Features which cannot be turned off
 911 * @num_mac_stats: Number of MAC stats reported by firmware (MAC_STATS_NUM_STATS
 912 *	field of %MC_CMD_GET_CAPABILITIES_V4 response, or %MC_CMD_MAC_NSTATS)
 913 * @stats_buffer: DMA buffer for statistics
 914 * @phy_type: PHY type
 915 * @phy_op: PHY interface
 916 * @phy_data: PHY private data (including PHY-specific stats)
 917 * @mdio: PHY MDIO interface
 918 * @mdio_bus: PHY MDIO bus ID (only used by Siena)
 919 * @phy_mode: PHY operating mode. Serialised by @mac_lock.
 920 * @link_advertising: Autonegotiation advertising flags
 921 * @fec_config: Forward Error Correction configuration flags.  For bit positions
 922 *	see &enum ethtool_fec_config_bits.
 923 * @link_state: Current state of the link
 924 * @n_link_state_changes: Number of times the link has changed state
 925 * @unicast_filter: Flag for Falcon-arch simple unicast filter.
 926 *	Protected by @mac_lock.
 927 * @multicast_hash: Multicast hash table for Falcon-arch.
 928 *	Protected by @mac_lock.
 929 * @wanted_fc: Wanted flow control flags
 930 * @fc_disable: When non-zero flow control is disabled. Typically used to
 931 *	ensure that network back pressure doesn't delay dma queue flushes.
 932 *	Serialised by the rtnl lock.
 933 * @mac_work: Work item for changing MAC promiscuity and multicast hash
 934 * @loopback_mode: Loopback status
 935 * @loopback_modes: Supported loopback mode bitmask
 936 * @loopback_selftest: Offline self-test private state
 937 * @xdp_prog: Current XDP programme for this interface
 938 * @filter_sem: Filter table rw_semaphore, protects existence of @filter_state
 939 * @filter_state: Architecture-dependent filter table state
 940 * @rps_mutex: Protects RPS state of all channels
 941 * @rps_slot_map: bitmap of in-flight entries in @rps_slot
 942 * @rps_slot: array of ARFS insertion requests for efx_filter_rfs_work()
 943 * @rps_hash_lock: Protects ARFS filter mapping state (@rps_hash_table and
 944 *	@rps_next_id).
 945 * @rps_hash_table: Mapping between ARFS filters and their various IDs
 946 * @rps_next_id: next arfs_id for an ARFS filter
 947 * @active_queues: Count of RX and TX queues that haven't been flushed and drained.
 948 * @rxq_flush_pending: Count of number of receive queues that need to be flushed.
 949 *	Decremented when the efx_flush_rx_queue() is called.
 950 * @rxq_flush_outstanding: Count of number of RX flushes started but not yet
 951 *	completed (either success or failure). Not used when MCDI is used to
 952 *	flush receive queues.
 953 * @flush_wq: wait queue used by efx_nic_flush_queues() to wait for flush completions.
 954 * @vf_count: Number of VFs intended to be enabled.
 955 * @vf_init_count: Number of VFs that have been fully initialised.
 956 * @vi_scale: log2 number of vnics per VF.
 957 * @ptp_data: PTP state data
 958 * @ptp_warned: has this NIC seen and warned about unexpected PTP events?
 959 * @vpd_sn: Serial number read from VPD
 960 * @xdp_rxq_info_failed: Have any of the rx queues failed to initialise their
 961 *      xdp_rxq_info structures?
 962 * @monitor_work: Hardware monitor workitem
 963 * @biu_lock: BIU (bus interface unit) lock
 964 * @last_irq_cpu: Last CPU to handle a possible test interrupt.  This
 965 *	field is used by efx_test_interrupts() to verify that an
 966 *	interrupt has occurred.
 967 * @stats_lock: Statistics update lock. Must be held when calling
 968 *	efx_nic_type::{update,start,stop}_stats.
 969 * @n_rx_noskb_drops: Count of RX packets dropped due to failure to allocate an skb
 970 *
 971 * This is stored in the private area of the &struct net_device.
 972 */
 973struct efx_nic {
 974	/* The following fields should be written very rarely */
 975
 976	char name[IFNAMSIZ];
 977	struct list_head node;
 978	struct efx_nic *primary;
 979	struct list_head secondary_list;
 980	struct pci_dev *pci_dev;
 981	unsigned int port_num;
 982	const struct efx_nic_type *type;
 983	int legacy_irq;
 984	bool eeh_disabled_legacy_irq;
 985	struct workqueue_struct *workqueue;
 986	char workqueue_name[16];
 987	struct work_struct reset_work;
 988	resource_size_t membase_phys;
 989	void __iomem *membase;
 990
 991	unsigned int vi_stride;
 992
 993	enum efx_int_mode interrupt_mode;
 994	unsigned int timer_quantum_ns;
 995	unsigned int timer_max_ns;
 996	bool irq_rx_adaptive;
 997	unsigned int irq_mod_step_us;
 998	unsigned int irq_rx_moderation_us;
 999	u32 msg_enable;
1000
1001	enum nic_state state;
1002	unsigned long reset_pending;
1003
1004	struct efx_channel *channel[EFX_MAX_CHANNELS];
1005	struct efx_msi_context msi_context[EFX_MAX_CHANNELS];
1006	const struct efx_channel_type *
1007	extra_channel_type[EFX_MAX_EXTRA_CHANNELS];
1008
1009	unsigned int xdp_tx_queue_count;
1010	struct efx_tx_queue **xdp_tx_queues;
1011
1012	unsigned rxq_entries;
1013	unsigned txq_entries;
1014	unsigned int txq_stop_thresh;
1015	unsigned int txq_wake_thresh;
1016
1017	unsigned tx_dc_base;
1018	unsigned rx_dc_base;
1019	unsigned sram_lim_qw;
1020	unsigned next_buffer_table;
1021
1022	unsigned int max_channels;
1023	unsigned int max_tx_channels;
1024	unsigned n_channels;
1025	unsigned n_rx_channels;
1026	unsigned rss_spread;
1027	unsigned tx_channel_offset;
1028	unsigned n_tx_channels;
1029	unsigned n_extra_tx_channels;
1030	unsigned int n_xdp_channels;
1031	unsigned int xdp_channel_offset;
1032	unsigned int xdp_tx_per_channel;
1033	unsigned int rx_ip_align;
1034	unsigned int rx_dma_len;
1035	unsigned int rx_buffer_order;
1036	unsigned int rx_buffer_truesize;
1037	unsigned int rx_page_buf_step;
1038	unsigned int rx_bufs_per_page;
1039	unsigned int rx_pages_per_batch;
1040	unsigned int rx_prefix_size;
1041	int rx_packet_hash_offset;
1042	int rx_packet_len_offset;
1043	int rx_packet_ts_offset;
1044	bool rx_scatter;
1045	struct efx_rss_context rss_context;
1046	struct mutex rss_lock;
1047
1048	unsigned int_error_count;
1049	unsigned long int_error_expire;
1050
1051	bool irq_soft_enabled;
1052	struct efx_buffer irq_status;
1053	unsigned irq_zero_count;
1054	unsigned irq_level;
1055	struct delayed_work selftest_work;
1056
1057#ifdef CONFIG_SFC_MTD
1058	struct list_head mtd_list;
1059#endif
1060
1061	void *nic_data;
1062	struct efx_mcdi_data *mcdi;
1063
1064	struct mutex mac_lock;
1065	struct work_struct mac_work;
1066	bool port_enabled;
1067
1068	bool mc_bist_for_other_fn;
1069	bool port_initialized;
1070	struct net_device *net_dev;
1071
1072	netdev_features_t fixed_features;
1073
1074	u16 num_mac_stats;
1075	struct efx_buffer stats_buffer;
1076	u64 rx_nodesc_drops_total;
1077	u64 rx_nodesc_drops_while_down;
1078	bool rx_nodesc_drops_prev_state;
1079
1080	unsigned int phy_type;
1081	const struct efx_phy_operations *phy_op;
1082	void *phy_data;
1083	struct mdio_if_info mdio;
1084	unsigned int mdio_bus;
1085	enum efx_phy_mode phy_mode;
1086
1087	__ETHTOOL_DECLARE_LINK_MODE_MASK(link_advertising);
1088	u32 fec_config;
1089	struct efx_link_state link_state;
1090	unsigned int n_link_state_changes;
1091
1092	bool unicast_filter;
1093	union efx_multicast_hash multicast_hash;
1094	u8 wanted_fc;
1095	unsigned fc_disable;
1096
1097	atomic_t rx_reset;
1098	enum efx_loopback_mode loopback_mode;
1099	u64 loopback_modes;
1100
1101	void *loopback_selftest;
1102	/* We access loopback_selftest immediately before running XDP,
1103	 * so we want them next to each other.
1104	 */
1105	struct bpf_prog __rcu *xdp_prog;
1106
1107	struct rw_semaphore filter_sem;
1108	void *filter_state;
1109#ifdef CONFIG_RFS_ACCEL
1110	struct mutex rps_mutex;
1111	unsigned long rps_slot_map;
1112	struct efx_async_filter_insertion rps_slot[EFX_RPS_MAX_IN_FLIGHT];
1113	spinlock_t rps_hash_lock;
1114	struct hlist_head *rps_hash_table;
1115	u32 rps_next_id;
1116#endif
1117
1118	atomic_t active_queues;
1119	atomic_t rxq_flush_pending;
1120	atomic_t rxq_flush_outstanding;
1121	wait_queue_head_t flush_wq;
1122
1123#ifdef CONFIG_SFC_SRIOV
1124	unsigned vf_count;
1125	unsigned vf_init_count;
1126	unsigned vi_scale;
1127#endif
1128
1129	struct efx_ptp_data *ptp_data;
1130	bool ptp_warned;
1131
1132	char *vpd_sn;
1133	bool xdp_rxq_info_failed;
1134
1135	/* The following fields may be written more often */
1136
1137	struct delayed_work monitor_work ____cacheline_aligned_in_smp;
1138	spinlock_t biu_lock;
1139	int last_irq_cpu;
1140	spinlock_t stats_lock;
1141	atomic_t n_rx_noskb_drops;
1142};
1143
1144static inline int efx_dev_registered(struct efx_nic *efx)
1145{
1146	return efx->net_dev->reg_state == NETREG_REGISTERED;
1147}
1148
1149static inline unsigned int efx_port_num(struct efx_nic *efx)
1150{
1151	return efx->port_num;
1152}
1153
1154struct efx_mtd_partition {
1155	struct list_head node;
1156	struct mtd_info mtd;
1157	const char *dev_type_name;
1158	const char *type_name;
1159	char name[IFNAMSIZ + 20];
1160};
1161
1162struct efx_udp_tunnel {
1163	u16 type; /* TUNNEL_ENCAP_UDP_PORT_ENTRY_foo, see mcdi_pcol.h */
1164	__be16 port;
1165	/* Count of repeated adds of the same port.  Used only inside the list,
1166	 * not in request arguments.
1167	 */
1168	u16 count;
1169};
1170
1171/**
1172 * struct efx_nic_type - Efx device type definition
1173 * @mem_bar: Get the memory BAR
1174 * @mem_map_size: Get memory BAR mapped size
1175 * @probe: Probe the controller
1176 * @remove: Free resources allocated by probe()
1177 * @init: Initialise the controller
1178 * @dimension_resources: Dimension controller resources (buffer table,
1179 *	and VIs once the available interrupt resources are clear)
1180 * @fini: Shut down the controller
1181 * @monitor: Periodic function for polling link state and hardware monitor
1182 * @map_reset_reason: Map ethtool reset reason to a reset method
1183 * @map_reset_flags: Map ethtool reset flags to a reset method, if possible
1184 * @reset: Reset the controller hardware and possibly the PHY.  This will
1185 *	be called while the controller is uninitialised.
1186 * @probe_port: Probe the MAC and PHY
1187 * @remove_port: Free resources allocated by probe_port()
1188 * @handle_global_event: Handle a "global" event (may be %NULL)
1189 * @fini_dmaq: Flush and finalise DMA queues (RX and TX queues)
1190 * @prepare_flush: Prepare the hardware for flushing the DMA queues
1191 *	(for Falcon architecture)
1192 * @finish_flush: Clean up after flushing the DMA queues (for Falcon
1193 *	architecture)
1194 * @prepare_flr: Prepare for an FLR
1195 * @finish_flr: Clean up after an FLR
1196 * @describe_stats: Describe statistics for ethtool
1197 * @update_stats: Update statistics not provided by event handling.
1198 *	Either argument may be %NULL.
1199 * @start_stats: Start the regular fetching of statistics
1200 * @pull_stats: Pull stats from the NIC and wait until they arrive.
1201 * @stop_stats: Stop the regular fetching of statistics
1202 * @set_id_led: Set state of identifying LED or revert to automatic function
1203 * @push_irq_moderation: Apply interrupt moderation value
1204 * @reconfigure_port: Push loopback/power/txdis changes to the MAC and PHY
1205 * @prepare_enable_fc_tx: Prepare MAC to enable pause frame TX (may be %NULL)
1206 * @reconfigure_mac: Push MAC address, MTU, flow control and filter settings
1207 *	to the hardware.  Serialised by the mac_lock.
1208 * @check_mac_fault: Check MAC fault state. True if fault present.
1209 * @get_wol: Get WoL configuration from driver state
1210 * @set_wol: Push WoL configuration to the NIC
1211 * @resume_wol: Synchronise WoL state between driver and MC (e.g. after resume)
1212 * @test_chip: Test registers.  May use efx_farch_test_registers(), and is
1213 *	expected to reset the NIC.
1214 * @test_nvram: Test validity of NVRAM contents
1215 * @mcdi_request: Send an MCDI request with the given header and SDU.
1216 *	The SDU length may be any value from 0 up to the protocol-
1217 *	defined maximum, but its buffer will be padded to a multiple
1218 *	of 4 bytes.
1219 * @mcdi_poll_response: Test whether an MCDI response is available.
1220 * @mcdi_read_response: Read the MCDI response PDU.  The offset will
1221 *	be a multiple of 4.  The length may not be, but the buffer
1222 *	will be padded so it is safe to round up.
1223 * @mcdi_poll_reboot: Test whether the MCDI has rebooted.  If so,
1224 *	return an appropriate error code for aborting any current
1225 *	request; otherwise return 0.
1226 * @irq_enable_master: Enable IRQs on the NIC.  Each event queue must
1227 *	be separately enabled after this.
1228 * @irq_test_generate: Generate a test IRQ
1229 * @irq_disable_non_ev: Disable non-event IRQs on the NIC.  Each event
1230 *	queue must be separately disabled before this.
1231 * @irq_handle_msi: Handle MSI for a channel.  The @dev_id argument is
1232 *	a pointer to the &struct efx_msi_context for the channel.
1233 * @irq_handle_legacy: Handle legacy interrupt.  The @dev_id argument
1234 *	is a pointer to the &struct efx_nic.
1235 * @tx_probe: Allocate resources for TX queue
1236 * @tx_init: Initialise TX queue on the NIC
1237 * @tx_remove: Free resources for TX queue
1238 * @tx_write: Write TX descriptors and doorbell
1239 * @rx_push_rss_config: Write RSS hash key and indirection table to the NIC
1240 * @rx_pull_rss_config: Read RSS hash key and indirection table back from the NIC
1241 * @rx_push_rss_context_config: Write RSS hash key and indirection table for
1242 *	user RSS context to the NIC
1243 * @rx_pull_rss_context_config: Read RSS hash key and indirection table for user
1244 *	RSS context back from the NIC
1245 * @rx_probe: Allocate resources for RX queue
1246 * @rx_init: Initialise RX queue on the NIC
1247 * @rx_remove: Free resources for RX queue
1248 * @rx_write: Write RX descriptors and doorbell
1249 * @rx_defer_refill: Generate a refill reminder event
1250 * @ev_probe: Allocate resources for event queue
1251 * @ev_init: Initialise event queue on the NIC
1252 * @ev_fini: Deinitialise event queue on the NIC
1253 * @ev_remove: Free resources for event queue
1254 * @ev_process: Process events for a queue, up to the given NAPI quota
1255 * @ev_read_ack: Acknowledge read events on a queue, rearming its IRQ
1256 * @ev_test_generate: Generate a test event
1257 * @filter_table_probe: Probe filter capabilities and set up filter software state
1258 * @filter_table_restore: Restore filters removed from hardware
1259 * @filter_table_remove: Remove filters from hardware and tear down software state
1260 * @filter_update_rx_scatter: Update filters after change to rx scatter setting
1261 * @filter_insert: add or replace a filter
1262 * @filter_remove_safe: remove a filter by ID, carefully
1263 * @filter_get_safe: retrieve a filter by ID, carefully
1264 * @filter_clear_rx: Remove all RX filters whose priority is less than or
1265 *	equal to the given priority and is not %EFX_FILTER_PRI_AUTO
1266 * @filter_count_rx_used: Get the number of filters in use at a given priority
1267 * @filter_get_rx_id_limit: Get maximum value of a filter id, plus 1
1268 * @filter_get_rx_ids: Get list of RX filters at a given priority
1269 * @filter_rfs_expire_one: Consider expiring a filter inserted for RFS.
1270 *	This must check whether the specified table entry is used by RFS
1271 *	and that rps_may_expire_flow() returns true for it.
1272 * @mtd_probe: Probe and add MTD partitions associated with this net device,
1273 *	 using efx_mtd_add()
1274 * @mtd_rename: Set an MTD partition name using the net device name
1275 * @mtd_read: Read from an MTD partition
1276 * @mtd_erase: Erase part of an MTD partition
1277 * @mtd_write: Write to an MTD partition
1278 * @mtd_sync: Wait for write-back to complete on MTD partition.  This
1279 *	also notifies the driver that a writer has finished using this
1280 *	partition.
1281 * @ptp_write_host_time: Send host time to MC as part of sync protocol
1282 * @ptp_set_ts_sync_events: Enable or disable sync events for inline RX
1283 *	timestamping, possibly only temporarily for the purposes of a reset.
1284 * @ptp_set_ts_config: Set hardware timestamp configuration.  The flags
1285 *	and tx_type will already have been validated but this operation
1286 *	must validate and update rx_filter.
1287 * @get_phys_port_id: Get the underlying physical port id.
1288 * @set_mac_address: Set the MAC address of the device
1289 * @tso_versions: Returns mask of firmware-assisted TSO versions supported.
1290 *	If %NULL, then device does not support any TSO version.
1291 * @udp_tnl_push_ports: Push the list of UDP tunnel ports to the NIC if required.
1292 * @udp_tnl_add_port: Add a UDP tunnel port
1293 * @udp_tnl_has_port: Check if a port has been added as UDP tunnel
1294 * @udp_tnl_del_port: Remove a UDP tunnel port
1295 * @revision: Hardware architecture revision
1296 * @txd_ptr_tbl_base: TX descriptor ring base address
1297 * @rxd_ptr_tbl_base: RX descriptor ring base address
1298 * @buf_tbl_base: Buffer table base address
1299 * @evq_ptr_tbl_base: Event queue pointer table base address
1300 * @evq_rptr_tbl_base: Event queue read-pointer table base address
1301 * @max_dma_mask: Maximum possible DMA mask
1302 * @rx_prefix_size: Size of RX prefix before packet data
1303 * @rx_hash_offset: Offset of RX flow hash within prefix
1304 * @rx_ts_offset: Offset of timestamp within prefix
1305 * @rx_buffer_padding: Size of padding at end of RX packet
1306 * @can_rx_scatter: NIC is able to scatter packets to multiple buffers
1307 * @always_rx_scatter: NIC will always s…

Large files files are truncated, but you can click here to view the full file