1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2018 Intel Corporation */
7 #include <linux/kobject.h>
9 #include <linux/netdevice.h>
10 #include <linux/vmalloc.h>
11 #include <linux/ethtool.h>
12 #include <linux/sctp.h>
13 #include <linux/ptp_clock_kernel.h>
14 #include <linux/timecounter.h>
15 #include <linux/net_tstamp.h>
16 #include <linux/bitfield.h>
20 void igc_ethtool_set_ops(struct net_device *);
22 /* Transmit and receive queues */
23 #define IGC_MAX_RX_QUEUES 4
24 #define IGC_MAX_TX_QUEUES 4
26 #define MAX_Q_VECTORS 8
27 #define MAX_STD_JUMBO_FRAME_SIZE 9216
29 #define MAX_ETYPE_FILTER 8
30 #define IGC_RETA_SIZE 128
34 #define IGC_N_PEROUT 2
37 #define MAX_FLEX_FILTER 32
39 enum igc_mac_filter_type {
40 IGC_MAC_FILTER_TYPE_DST = 0,
41 IGC_MAC_FILTER_TYPE_SRC
44 struct igc_tx_queue_stats {
51 struct igc_rx_queue_stats {
59 struct igc_rx_packet_stats {
60 u64 ipv4_packets; /* IPv4 headers processed */
61 u64 ipv4e_packets; /* IPv4E headers with extensions processed */
62 u64 ipv6_packets; /* IPv6 headers processed */
63 u64 ipv6e_packets; /* IPv6E headers with extensions processed */
64 u64 tcp_packets; /* TCP headers processed */
65 u64 udp_packets; /* UDP headers processed */
66 u64 sctp_packets; /* SCTP headers processed */
67 u64 nfs_packets; /* NFS headers processe */
71 struct igc_ring_container {
72 struct igc_ring *ring; /* pointer to linked list of rings */
73 unsigned int total_bytes; /* total bytes processed this int */
74 unsigned int total_packets; /* total packets processed this int */
75 u16 work_limit; /* total work allowed per interrupt */
76 u8 count; /* total number of rings in vector */
77 u8 itr; /* current ITR setting for ring */
81 struct igc_q_vector *q_vector; /* backlink to q_vector */
82 struct net_device *netdev; /* back pointer to net_device */
83 struct device *dev; /* device for dma mapping */
84 union { /* array of buffer info structs */
85 struct igc_tx_buffer *tx_buffer_info;
86 struct igc_rx_buffer *rx_buffer_info;
88 void *desc; /* descriptor ring memory */
89 unsigned long flags; /* ring specific flags */
90 void __iomem *tail; /* pointer to ring tail register */
91 dma_addr_t dma; /* phys address of the ring */
92 unsigned int size; /* length of desc. ring in bytes */
94 u16 count; /* number of desc. in the ring */
95 u8 queue_index; /* logical index of the ring*/
96 u8 reg_idx; /* physical index of the ring */
97 bool launchtime_enable; /* true if LaunchTime is enabled */
98 ktime_t last_tx_cycle; /* end of the cycle with a launchtime transmission */
99 ktime_t last_ff_cycle; /* Last cycle with an active first flag */
106 bool cbs_enable; /* indicates if CBS is enabled */
107 s32 idleslope; /* idleSlope in kbps */
108 s32 sendslope; /* sendSlope in kbps */
109 s32 hicredit; /* hiCredit in bytes */
110 s32 locredit; /* loCredit in bytes */
112 /* everything past this point are written often */
120 struct igc_tx_queue_stats tx_stats;
121 struct u64_stats_sync tx_syncp;
122 struct u64_stats_sync tx_syncp2;
126 struct igc_rx_queue_stats rx_stats;
127 struct igc_rx_packet_stats pkt_stats;
128 struct u64_stats_sync rx_syncp;
133 struct xdp_rxq_info xdp_rxq;
134 struct xsk_buff_pool *xsk_pool;
135 } ____cacheline_internodealigned_in_smp;
137 /* Board specific private data structure */
139 struct net_device *netdev;
141 struct ethtool_eee eee;
146 unsigned int num_q_vectors;
148 struct msix_entry *msix_entries;
152 u32 tx_timeout_count;
154 struct igc_ring *tx_ring[IGC_MAX_TX_QUEUES];
158 struct igc_ring *rx_ring[IGC_MAX_RX_QUEUES];
160 struct timer_list watchdog_timer;
161 struct timer_list dma_err_timer;
162 struct timer_list phy_info_timer;
172 /* Interrupt Throttle Rate */
176 struct work_struct reset_task;
177 struct work_struct watchdog_task;
178 struct work_struct dma_err_task;
181 u8 tx_timeout_factor;
191 u32 qbv_config_change_errors;
193 /* OS defined structs */
194 struct pci_dev *pdev;
195 /* lock for statistics */
196 spinlock_t stats64_lock;
197 struct rtnl_link_stats64 stats64;
199 /* structs defined in igc_hw.h */
201 struct igc_hw_stats stats;
203 struct igc_q_vector *q_vector[MAX_Q_VECTORS];
204 u32 eims_enable_mask;
210 u32 tx_hwtstamp_timeouts;
211 u32 tx_hwtstamp_skipped;
212 u32 rx_hwtstamp_cleared;
215 u32 rss_indir_tbl_init;
217 /* Any access to elements in nfc_rule_list is protected by the
220 struct mutex nfc_rule_lock;
221 struct list_head nfc_rule_list;
222 unsigned int nfc_rule_count;
224 u8 rss_indir_tbl[IGC_RETA_SIZE];
226 unsigned long link_check_timeout;
231 struct ptp_clock *ptp_clock;
232 struct ptp_clock_info ptp_caps;
233 /* Access to ptp_tx_skb and ptp_tx_start are protected by the
236 spinlock_t ptp_tx_lock;
237 struct sk_buff *ptp_tx_skb;
238 struct hwtstamp_config tstamp_config;
239 unsigned long ptp_tx_start;
240 unsigned int ptp_flags;
241 /* System time value lock */
242 spinlock_t tmreg_lock;
243 struct cyclecounter cc;
244 struct timecounter tc;
245 struct timespec64 prev_ptp_time; /* Pre-reset PTP clock */
246 ktime_t ptp_reset_start; /* Reset time in clock mono */
247 struct system_time_snapshot snapshot;
251 struct bpf_prog *xdp_prog;
253 bool pps_sys_wrap_on;
255 struct ptp_pin_desc sdp_config[IGC_N_SDP];
257 struct timespec64 start;
258 struct timespec64 period;
259 } perout[IGC_N_PEROUT];
262 void igc_up(struct igc_adapter *adapter);
263 void igc_down(struct igc_adapter *adapter);
264 int igc_open(struct net_device *netdev);
265 int igc_close(struct net_device *netdev);
266 int igc_setup_tx_resources(struct igc_ring *ring);
267 int igc_setup_rx_resources(struct igc_ring *ring);
268 void igc_free_tx_resources(struct igc_ring *ring);
269 void igc_free_rx_resources(struct igc_ring *ring);
270 unsigned int igc_get_max_rss_queues(struct igc_adapter *adapter);
271 void igc_set_flag_queue_pairs(struct igc_adapter *adapter,
272 const u32 max_rss_queues);
273 int igc_reinit_queues(struct igc_adapter *adapter);
274 void igc_write_rss_indir_tbl(struct igc_adapter *adapter);
275 bool igc_has_link(struct igc_adapter *adapter);
276 void igc_reset(struct igc_adapter *adapter);
277 void igc_update_stats(struct igc_adapter *adapter);
278 void igc_disable_rx_ring(struct igc_ring *ring);
279 void igc_enable_rx_ring(struct igc_ring *ring);
280 void igc_disable_tx_ring(struct igc_ring *ring);
281 void igc_enable_tx_ring(struct igc_ring *ring);
282 int igc_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags);
284 /* igc_dump declarations */
285 void igc_rings_dump(struct igc_adapter *adapter);
286 void igc_regs_dump(struct igc_adapter *adapter);
288 extern char igc_driver_name[];
290 #define IGC_REGS_LEN 740
292 /* flags controlling PTP/1588 function */
293 #define IGC_PTP_ENABLED BIT(0)
295 /* Flags definitions */
296 #define IGC_FLAG_HAS_MSI BIT(0)
297 #define IGC_FLAG_QUEUE_PAIRS BIT(3)
298 #define IGC_FLAG_DMAC BIT(4)
299 #define IGC_FLAG_PTP BIT(8)
300 #define IGC_FLAG_WOL_SUPPORTED BIT(8)
301 #define IGC_FLAG_NEED_LINK_UPDATE BIT(9)
302 #define IGC_FLAG_HAS_MSIX BIT(13)
303 #define IGC_FLAG_EEE BIT(14)
304 #define IGC_FLAG_VLAN_PROMISC BIT(15)
305 #define IGC_FLAG_RX_LEGACY BIT(16)
306 #define IGC_FLAG_TSN_QBV_ENABLED BIT(17)
307 #define IGC_FLAG_TSN_QAV_ENABLED BIT(18)
309 #define IGC_FLAG_TSN_ANY_ENABLED \
310 (IGC_FLAG_TSN_QBV_ENABLED | IGC_FLAG_TSN_QAV_ENABLED)
312 #define IGC_FLAG_RSS_FIELD_IPV4_UDP BIT(6)
313 #define IGC_FLAG_RSS_FIELD_IPV6_UDP BIT(7)
315 #define IGC_MRQC_ENABLE_RSS_MQ 0x00000002
316 #define IGC_MRQC_RSS_FIELD_IPV4_UDP 0x00400000
317 #define IGC_MRQC_RSS_FIELD_IPV6_UDP 0x00800000
319 /* RX-desc Write-Back format RSS Type's */
320 enum igc_rss_type_num {
321 IGC_RSS_TYPE_NO_HASH = 0,
322 IGC_RSS_TYPE_HASH_TCP_IPV4 = 1,
323 IGC_RSS_TYPE_HASH_IPV4 = 2,
324 IGC_RSS_TYPE_HASH_TCP_IPV6 = 3,
325 IGC_RSS_TYPE_HASH_IPV6_EX = 4,
326 IGC_RSS_TYPE_HASH_IPV6 = 5,
327 IGC_RSS_TYPE_HASH_TCP_IPV6_EX = 6,
328 IGC_RSS_TYPE_HASH_UDP_IPV4 = 7,
329 IGC_RSS_TYPE_HASH_UDP_IPV6 = 8,
330 IGC_RSS_TYPE_HASH_UDP_IPV6_EX = 9,
331 IGC_RSS_TYPE_MAX = 10,
333 #define IGC_RSS_TYPE_MAX_TABLE 16
334 #define IGC_RSS_TYPE_MASK GENMASK(3,0) /* 4-bits (3:0) = mask 0x0F */
336 /* igc_rss_type - Rx descriptor RSS type field */
337 static inline u32 igc_rss_type(const union igc_adv_rx_desc *rx_desc)
339 /* RSS Type 4-bits (3:0) number: 0-9 (above 9 is reserved)
340 * Accessing the same bits via u16 (wb.lower.lo_dword.hs_rss.pkt_info)
341 * is slightly slower than via u32 (wb.lower.lo_dword.data)
343 return le32_get_bits(rx_desc->wb.lower.lo_dword.data, IGC_RSS_TYPE_MASK);
346 /* Interrupt defines */
347 #define IGC_START_ITR 648 /* ~6000 ints/sec */
348 #define IGC_4K_ITR 980
349 #define IGC_20K_ITR 196
350 #define IGC_70K_ITR 56
352 #define IGC_DEFAULT_ITR 3 /* dynamic */
353 #define IGC_MAX_ITR_USECS 10000
354 #define IGC_MIN_ITR_USECS 10
355 #define NON_Q_VECTORS 1
356 #define MAX_MSIX_ENTRIES 10
358 /* TX/RX descriptor defines */
359 #define IGC_DEFAULT_TXD 256
360 #define IGC_DEFAULT_TX_WORK 128
361 #define IGC_MIN_TXD 80
362 #define IGC_MAX_TXD 4096
364 #define IGC_DEFAULT_RXD 256
365 #define IGC_MIN_RXD 80
366 #define IGC_MAX_RXD 4096
368 /* Supported Rx Buffer Sizes */
369 #define IGC_RXBUFFER_256 256
370 #define IGC_RXBUFFER_2048 2048
371 #define IGC_RXBUFFER_3072 3072
373 #define AUTO_ALL_MODES 0
374 #define IGC_RX_HDR_LEN IGC_RXBUFFER_256
376 /* Transmit and receive latency (for PTP timestamps) */
377 #define IGC_I225_TX_LATENCY_10 240
378 #define IGC_I225_TX_LATENCY_100 58
379 #define IGC_I225_TX_LATENCY_1000 80
380 #define IGC_I225_TX_LATENCY_2500 1325
381 #define IGC_I225_RX_LATENCY_10 6450
382 #define IGC_I225_RX_LATENCY_100 185
383 #define IGC_I225_RX_LATENCY_1000 300
384 #define IGC_I225_RX_LATENCY_2500 1485
386 /* RX and TX descriptor control thresholds.
387 * PTHRESH - MAC will consider prefetch if it has fewer than this number of
388 * descriptors available in its onboard memory.
389 * Setting this to 0 disables RX descriptor prefetch.
390 * HTHRESH - MAC will only prefetch if there are at least this many descriptors
391 * available in host memory.
392 * If PTHRESH is 0, this should also be 0.
393 * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
394 * descriptors until either it has this many to write back, or the
397 #define IGC_RX_PTHRESH 8
398 #define IGC_RX_HTHRESH 8
399 #define IGC_TX_PTHRESH 8
400 #define IGC_TX_HTHRESH 1
401 #define IGC_RX_WTHRESH 4
402 #define IGC_TX_WTHRESH 16
404 #define IGC_RX_DMA_ATTR \
405 (DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
407 #define IGC_TS_HDR_LEN 16
409 #define IGC_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN)
411 #if (PAGE_SIZE < 8192)
412 #define IGC_MAX_FRAME_BUILD_SKB \
413 (SKB_WITH_OVERHEAD(IGC_RXBUFFER_2048) - IGC_SKB_PAD - IGC_TS_HDR_LEN)
415 #define IGC_MAX_FRAME_BUILD_SKB (IGC_RXBUFFER_2048 - IGC_TS_HDR_LEN)
418 /* How many Rx Buffers do we bundle into one write to the hardware ? */
419 #define IGC_RX_BUFFER_WRITE 16 /* Must be power of 2 */
422 #define IGC_TX_FLAGS_VLAN_MASK 0xffff0000
423 #define IGC_TX_FLAGS_VLAN_SHIFT 16
425 /* igc_test_staterr - tests bits within Rx descriptor status and error fields */
426 static inline __le32 igc_test_staterr(union igc_adv_rx_desc *rx_desc,
427 const u32 stat_err_bits)
429 return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
440 IGC_TX_FLAGS_VLAN = 0x01,
441 IGC_TX_FLAGS_TSO = 0x02,
442 IGC_TX_FLAGS_TSTAMP = 0x04,
445 IGC_TX_FLAGS_IPV4 = 0x10,
446 IGC_TX_FLAGS_CSUM = 0x20,
453 /* The largest size we can write to the descriptor is 65535. In order to
454 * maintain a power of two alignment we have to limit ourselves to 32K.
456 #define IGC_MAX_TXD_PWR 15
457 #define IGC_MAX_DATA_PER_TXD BIT(IGC_MAX_TXD_PWR)
459 /* Tx Descriptors needed, worst case */
460 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IGC_MAX_DATA_PER_TXD)
461 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
463 enum igc_tx_buffer_type {
464 IGC_TX_BUFFER_TYPE_SKB,
465 IGC_TX_BUFFER_TYPE_XDP,
466 IGC_TX_BUFFER_TYPE_XSK,
469 /* wrapper around a pointer to a socket buffer,
470 * so a DMA handle can be stored along with the buffer
472 struct igc_tx_buffer {
473 union igc_adv_tx_desc *next_to_watch;
474 unsigned long time_stamp;
475 enum igc_tx_buffer_type type;
478 struct xdp_frame *xdpf;
480 unsigned int bytecount;
484 DEFINE_DMA_UNMAP_ADDR(dma);
485 DEFINE_DMA_UNMAP_LEN(len);
489 struct igc_rx_buffer {
494 #if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
501 struct xdp_buff *xdp;
505 /* context wrapper around xdp_buff to provide access to descriptor metadata */
506 struct igc_xdp_buff {
508 union igc_adv_rx_desc *rx_desc;
509 ktime_t rx_ts; /* data indication bit IGC_RXDADV_STAT_TSIP */
512 struct igc_q_vector {
513 struct igc_adapter *adapter; /* backlink */
514 void __iomem *itr_register;
515 u32 eims_value; /* EIMS mask value */
520 struct igc_ring_container rx, tx;
522 struct napi_struct napi;
524 struct rcu_head rcu; /* to avoid race with update stats on free */
525 char name[IFNAMSIZ + 9];
526 struct net_device poll_dev;
528 /* for dynamic allocation of rings associated with this q_vector */
529 struct igc_ring ring[] ____cacheline_internodealigned_in_smp;
532 enum igc_filter_match_flags {
533 IGC_FILTER_FLAG_ETHER_TYPE = BIT(0),
534 IGC_FILTER_FLAG_VLAN_TCI = BIT(1),
535 IGC_FILTER_FLAG_SRC_MAC_ADDR = BIT(2),
536 IGC_FILTER_FLAG_DST_MAC_ADDR = BIT(3),
537 IGC_FILTER_FLAG_USER_DATA = BIT(4),
538 IGC_FILTER_FLAG_VLAN_ETYPE = BIT(5),
541 struct igc_nfc_filter {
546 u8 src_addr[ETH_ALEN];
547 u8 dst_addr[ETH_ALEN];
557 struct igc_nfc_rule {
558 struct list_head list;
559 struct igc_nfc_filter filter;
565 /* IGC supports a total of 32 NFC rules: 16 MAC address based, 8 VLAN priority
566 * based, 8 ethertype based and 32 Flex filter based rules.
568 #define IGC_MAX_RXNFC_RULES 64
570 struct igc_flex_filter {
581 /* igc_desc_unused - calculate if we have unused descriptors */
582 static inline u16 igc_desc_unused(const struct igc_ring *ring)
584 u16 ntc = ring->next_to_clean;
585 u16 ntu = ring->next_to_use;
587 return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
590 static inline s32 igc_get_phy_info(struct igc_hw *hw)
592 if (hw->phy.ops.get_phy_info)
593 return hw->phy.ops.get_phy_info(hw);
598 static inline s32 igc_reset_phy(struct igc_hw *hw)
600 if (hw->phy.ops.reset)
601 return hw->phy.ops.reset(hw);
606 static inline struct netdev_queue *txring_txq(const struct igc_ring *tx_ring)
608 return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);
611 enum igc_ring_flags_t {
612 IGC_RING_FLAG_RX_3K_BUFFER,
613 IGC_RING_FLAG_RX_BUILD_SKB_ENABLED,
614 IGC_RING_FLAG_RX_SCTP_CSUM,
615 IGC_RING_FLAG_RX_LB_VLAN_BSWAP,
616 IGC_RING_FLAG_TX_CTX_IDX,
617 IGC_RING_FLAG_TX_DETECT_HANG,
618 IGC_RING_FLAG_AF_XDP_ZC,
619 IGC_RING_FLAG_TX_HWTSTAMP,
622 #define ring_uses_large_buffer(ring) \
623 test_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
624 #define set_ring_uses_large_buffer(ring) \
625 set_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
626 #define clear_ring_uses_large_buffer(ring) \
627 clear_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
629 #define ring_uses_build_skb(ring) \
630 test_bit(IGC_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags)
632 static inline unsigned int igc_rx_bufsz(struct igc_ring *ring)
634 #if (PAGE_SIZE < 8192)
635 if (ring_uses_large_buffer(ring))
636 return IGC_RXBUFFER_3072;
638 if (ring_uses_build_skb(ring))
639 return IGC_MAX_FRAME_BUILD_SKB + IGC_TS_HDR_LEN;
641 return IGC_RXBUFFER_2048;
644 static inline unsigned int igc_rx_pg_order(struct igc_ring *ring)
646 #if (PAGE_SIZE < 8192)
647 if (ring_uses_large_buffer(ring))
653 static inline s32 igc_read_phy_reg(struct igc_hw *hw, u32 offset, u16 *data)
655 if (hw->phy.ops.read_reg)
656 return hw->phy.ops.read_reg(hw, offset, data);
661 void igc_reinit_locked(struct igc_adapter *);
662 struct igc_nfc_rule *igc_get_nfc_rule(struct igc_adapter *adapter,
664 int igc_add_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule);
665 void igc_del_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule);
667 void igc_ptp_init(struct igc_adapter *adapter);
668 void igc_ptp_reset(struct igc_adapter *adapter);
669 void igc_ptp_suspend(struct igc_adapter *adapter);
670 void igc_ptp_stop(struct igc_adapter *adapter);
671 ktime_t igc_ptp_rx_pktstamp(struct igc_adapter *adapter, __le32 *buf);
672 int igc_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr);
673 int igc_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr);
674 void igc_ptp_tx_hang(struct igc_adapter *adapter);
675 void igc_ptp_read(struct igc_adapter *adapter, struct timespec64 *ts);
676 void igc_ptp_tx_tstamp_event(struct igc_adapter *adapter);
678 #define igc_rx_pg_size(_ring) (PAGE_SIZE << igc_rx_pg_order(_ring))
680 #define IGC_TXD_DCMD (IGC_ADVTXD_DCMD_EOP | IGC_ADVTXD_DCMD_RS)
682 #define IGC_RX_DESC(R, i) \
683 (&(((union igc_adv_rx_desc *)((R)->desc))[i]))
684 #define IGC_TX_DESC(R, i) \
685 (&(((union igc_adv_tx_desc *)((R)->desc))[i]))
686 #define IGC_TX_CTXTDESC(R, i) \
687 (&(((struct igc_adv_tx_context_desc *)((R)->desc))[i]))