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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/drivers/net/ethernet/sfc/nic.h
....@@ -1,142 +1,17 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /****************************************************************************
23  * Driver for Solarflare network controllers and boards
34  * Copyright 2005-2006 Fen Systems Ltd.
45  * Copyright 2006-2013 Solarflare Communications Inc.
5
- *
6
- * This program is free software; you can redistribute it and/or modify it
7
- * under the terms of the GNU General Public License version 2 as published
8
- * by the Free Software Foundation, incorporated herein by reference.
96  */
107 
118 #ifndef EFX_NIC_H
129 #define EFX_NIC_H
1310 
14
-#include <linux/net_tstamp.h>
15
-#include <linux/i2c-algo-bit.h>
16
-#include "net_driver.h"
11
+#include "nic_common.h"
1712 #include "efx.h"
18
-#include "mcdi.h"
19
-
20
-enum {
21
-	/* Revisions 0-2 were Falcon A0, A1 and B0 respectively.
22
-	 * They are not supported by this driver but these revision numbers
23
-	 * form part of the ethtool API for register dumping.
24
-	 */
25
-	EFX_REV_SIENA_A0 = 3,
26
-	EFX_REV_HUNT_A0 = 4,
27
-};
28
-
29
-static inline int efx_nic_rev(struct efx_nic *efx)
30
-{
31
-	return efx->type->revision;
32
-}
3313 
3414 u32 efx_farch_fpga_ver(struct efx_nic *efx);
35
-
36
-/* Read the current event from the event queue */
37
-static inline efx_qword_t *efx_event(struct efx_channel *channel,
38
-				     unsigned int index)
39
-{
40
-	return ((efx_qword_t *) (channel->eventq.buf.addr)) +
41
-		(index & channel->eventq_mask);
42
-}
43
-
44
-/* See if an event is present
45
- *
46
- * We check both the high and low dword of the event for all ones.  We
47
- * wrote all ones when we cleared the event, and no valid event can
48
- * have all ones in either its high or low dwords.  This approach is
49
- * robust against reordering.
50
- *
51
- * Note that using a single 64-bit comparison is incorrect; even
52
- * though the CPU read will be atomic, the DMA write may not be.
53
- */
54
-static inline int efx_event_present(efx_qword_t *event)
55
-{
56
-	return !(EFX_DWORD_IS_ALL_ONES(event->dword[0]) |
57
-		  EFX_DWORD_IS_ALL_ONES(event->dword[1]));
58
-}
59
-
60
-/* Returns a pointer to the specified transmit descriptor in the TX
61
- * descriptor queue belonging to the specified channel.
62
- */
63
-static inline efx_qword_t *
64
-efx_tx_desc(struct efx_tx_queue *tx_queue, unsigned int index)
65
-{
66
-	return ((efx_qword_t *) (tx_queue->txd.buf.addr)) + index;
67
-}
68
-
69
-/* Get partner of a TX queue, seen as part of the same net core queue */
70
-static struct efx_tx_queue *efx_tx_queue_partner(struct efx_tx_queue *tx_queue)
71
-{
72
-	if (tx_queue->queue & EFX_TXQ_TYPE_OFFLOAD)
73
-		return tx_queue - EFX_TXQ_TYPE_OFFLOAD;
74
-	else
75
-		return tx_queue + EFX_TXQ_TYPE_OFFLOAD;
76
-}
77
-
78
-/* Report whether this TX queue would be empty for the given write_count.
79
- * May return false negative.
80
- */
81
-static inline bool __efx_nic_tx_is_empty(struct efx_tx_queue *tx_queue,
82
-					 unsigned int write_count)
83
-{
84
-	unsigned int empty_read_count = READ_ONCE(tx_queue->empty_read_count);
85
-
86
-	if (empty_read_count == 0)
87
-		return false;
88
-
89
-	return ((empty_read_count ^ write_count) & ~EFX_EMPTY_COUNT_VALID) == 0;
90
-}
91
-
92
-/* Report whether the NIC considers this TX queue empty, using
93
- * packet_write_count (the write count recorded for the last completable
94
- * doorbell push).  May return false negative.  EF10 only, which is OK
95
- * because only EF10 supports PIO.
96
- */
97
-static inline bool efx_nic_tx_is_empty(struct efx_tx_queue *tx_queue)
98
-{
99
-	EFX_WARN_ON_ONCE_PARANOID(!tx_queue->efx->type->option_descriptors);
100
-	return __efx_nic_tx_is_empty(tx_queue, tx_queue->packet_write_count);
101
-}
102
-
103
-/* Decide whether we can use TX PIO, ie. write packet data directly into
104
- * a buffer on the device.  This can reduce latency at the expense of
105
- * throughput, so we only do this if both hardware and software TX rings
106
- * are empty.  This also ensures that only one packet at a time can be
107
- * using the PIO buffer.
108
- */
109
-static inline bool efx_nic_may_tx_pio(struct efx_tx_queue *tx_queue)
110
-{
111
-	struct efx_tx_queue *partner = efx_tx_queue_partner(tx_queue);
112
-
113
-	return tx_queue->piobuf && efx_nic_tx_is_empty(tx_queue) &&
114
-	       efx_nic_tx_is_empty(partner);
115
-}
116
-
117
-/* Decide whether to push a TX descriptor to the NIC vs merely writing
118
- * the doorbell.  This can reduce latency when we are adding a single
119
- * descriptor to an empty queue, but is otherwise pointless.  Further,
120
- * Falcon and Siena have hardware bugs (SF bug 33851) that may be
121
- * triggered if we don't check this.
122
- * We use the write_count used for the last doorbell push, to get the
123
- * NIC's view of the tx queue.
124
- */
125
-static inline bool efx_nic_may_push_tx_desc(struct efx_tx_queue *tx_queue,
126
-					    unsigned int write_count)
127
-{
128
-	bool was_empty = __efx_nic_tx_is_empty(tx_queue, write_count);
129
-
130
-	tx_queue->empty_read_count = 0;
131
-	return was_empty && tx_queue->write_count - write_count == 1;
132
-}
133
-
134
-/* Returns a pointer to the specified descriptor in the RX descriptor queue */
135
-static inline efx_qword_t *
136
-efx_rx_desc(struct efx_rx_queue *rx_queue, unsigned int index)
137
-{
138
-	return ((efx_qword_t *) (rx_queue->rxd.buf.addr)) + index;
139
-}
14015 
14116 enum {
14217 	PHY_TYPE_NONE = 0,
....@@ -148,18 +23,6 @@
14823 	PHY_TYPE_SFT9001A = 8,
14924 	PHY_TYPE_QT2025C = 9,
15025 	PHY_TYPE_SFT9001B = 10,
151
-};
152
-
153
-/* Alignment of PCIe DMA boundaries (4KB) */
154
-#define EFX_PAGE_SIZE	4096
155
-/* Size and alignment of buffer table entries (same) */
156
-#define EFX_BUF_SIZE	EFX_PAGE_SIZE
157
-
158
-/* NIC-generic software stats */
159
-enum {
160
-	GENERIC_STAT_rx_noskb_drops,
161
-	GENERIC_STAT_rx_nodesc_trunc,
162
-	GENERIC_STAT_COUNT
16326 };
16427 
16528 enum {
....@@ -363,10 +226,6 @@
363226  * @warm_boot_count: Last seen MC warm boot count
364227  * @vi_base: Absolute index of first VI in this function
365228  * @n_allocated_vis: Number of VIs allocated to this function
366
- * @must_realloc_vis: Flag: VIs have yet to be reallocated after MC reboot
367
- * @must_restore_rss_contexts: Flag: RSS contexts have yet to be restored after
368
- *	MC reboot
369
- * @must_restore_filters: Flag: filters have yet to be restored after MC reboot
370229  * @n_piobufs: Number of PIO buffers allocated to this function
371230  * @wc_membase: Base address of write-combining mapping of the memory BAR
372231  * @pio_write_base: Base address for writing PIO buffers
....@@ -375,7 +234,7 @@
375234  * @piobuf_size: size of a single PIO buffer
376235  * @must_restore_piobufs: Flag: PIO buffers have yet to be restored after MC
377236  *	reboot
378
- * @rx_rss_context_exclusive: Whether our RSS context is exclusive or shared
237
+ * @mc_stats: Scratch buffer for converting statistics to the kernel's format
379238  * @stats: Hardware statistics
380239  * @workaround_35388: Flag: firmware supports workaround for bug 35388
381240  * @workaround_26807: Flag: firmware supports workaround for bug 26807
....@@ -388,7 +247,6 @@
388247  * %MC_CMD_GET_CAPABILITIES response)
389248  * @rx_dpcpu_fw_id: Firmware ID of the RxDPCPU
390249  * @tx_dpcpu_fw_id: Firmware ID of the TxDPCPU
391
- * @vport_id: The function's vport ID, only relevant for PFs
392250  * @must_probe_vswitching: Flag: vswitching has yet to be setup after MC reboot
393251  * @pf_index: The number for this PF, or the parent PF if this is a VF
394252 #ifdef CONFIG_SFC_SRIOV
....@@ -407,16 +265,13 @@
407265 	u16 warm_boot_count;
408266 	unsigned int vi_base;
409267 	unsigned int n_allocated_vis;
410
-	bool must_realloc_vis;
411
-	bool must_restore_rss_contexts;
412
-	bool must_restore_filters;
413268 	unsigned int n_piobufs;
414269 	void __iomem *wc_membase, *pio_write_base;
415270 	unsigned int pio_write_vi_base;
416271 	unsigned int piobuf_handle[EF10_TX_PIOBUF_COUNT];
417272 	u16 piobuf_size;
418273 	bool must_restore_piobufs;
419
-	bool rx_rss_context_exclusive;
274
+	__le64 *mc_stats;
420275 	u64 stats[EF10_STAT_COUNT];
421276 	bool workaround_35388;
422277 	bool workaround_26807;
....@@ -426,7 +281,6 @@
426281 	u32 datapath_caps2;
427282 	unsigned int rx_dpcpu_fw_id;
428283 	unsigned int tx_dpcpu_fw_id;
429
-	unsigned int vport_id;
430284 	bool must_probe_vswitching;
431285 	unsigned int pf_index;
432286 	u8 port_id[ETH_ALEN];
....@@ -443,121 +297,18 @@
443297 	u64 licensed_features;
444298 };
445299 
300
+/* TSOv2 */
301
+int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, struct sk_buff *skb,
302
+			 bool *data_mapped);
303
+
446304 int efx_init_sriov(void);
447305 void efx_fini_sriov(void);
448306 
449
-struct ethtool_ts_info;
450
-int efx_ptp_probe(struct efx_nic *efx, struct efx_channel *channel);
451
-void efx_ptp_defer_probe_with_channel(struct efx_nic *efx);
452
-struct efx_channel *efx_ptp_channel(struct efx_nic *efx);
453
-void efx_ptp_remove(struct efx_nic *efx);
454
-int efx_ptp_set_ts_config(struct efx_nic *efx, struct ifreq *ifr);
455
-int efx_ptp_get_ts_config(struct efx_nic *efx, struct ifreq *ifr);
456
-void efx_ptp_get_ts_info(struct efx_nic *efx, struct ethtool_ts_info *ts_info);
457
-bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
458
-int efx_ptp_get_mode(struct efx_nic *efx);
459
-int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
460
-			unsigned int new_mode);
461
-int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
462
-void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev);
463
-size_t efx_ptp_describe_stats(struct efx_nic *efx, u8 *strings);
464
-size_t efx_ptp_update_stats(struct efx_nic *efx, u64 *stats);
465
-void efx_time_sync_event(struct efx_channel *channel, efx_qword_t *ev);
466
-void __efx_rx_skb_attach_timestamp(struct efx_channel *channel,
467
-				   struct sk_buff *skb);
468
-static inline void efx_rx_skb_attach_timestamp(struct efx_channel *channel,
469
-					       struct sk_buff *skb)
470
-{
471
-	if (channel->sync_events_state == SYNC_EVENTS_VALID)
472
-		__efx_rx_skb_attach_timestamp(channel, skb);
473
-}
474
-void efx_ptp_start_datapath(struct efx_nic *efx);
475
-void efx_ptp_stop_datapath(struct efx_nic *efx);
476
-bool efx_ptp_use_mac_tx_timestamps(struct efx_nic *efx);
477
-ktime_t efx_ptp_nic_to_kernel_time(struct efx_tx_queue *tx_queue);
478
-
479
-extern const struct efx_nic_type falcon_a1_nic_type;
480
-extern const struct efx_nic_type falcon_b0_nic_type;
481307 extern const struct efx_nic_type siena_a0_nic_type;
482308 extern const struct efx_nic_type efx_hunt_a0_nic_type;
483309 extern const struct efx_nic_type efx_hunt_a0_vf_nic_type;
484310 
485
-/**************************************************************************
486
- *
487
- * Externs
488
- *
489
- **************************************************************************
490
- */
491
-
492311 int falcon_probe_board(struct efx_nic *efx, u16 revision_info);
493
-
494
-/* TX data path */
495
-static inline int efx_nic_probe_tx(struct efx_tx_queue *tx_queue)
496
-{
497
-	return tx_queue->efx->type->tx_probe(tx_queue);
498
-}
499
-static inline void efx_nic_init_tx(struct efx_tx_queue *tx_queue)
500
-{
501
-	tx_queue->efx->type->tx_init(tx_queue);
502
-}
503
-static inline void efx_nic_remove_tx(struct efx_tx_queue *tx_queue)
504
-{
505
-	tx_queue->efx->type->tx_remove(tx_queue);
506
-}
507
-static inline void efx_nic_push_buffers(struct efx_tx_queue *tx_queue)
508
-{
509
-	tx_queue->efx->type->tx_write(tx_queue);
510
-}
511
-
512
-/* RX data path */
513
-static inline int efx_nic_probe_rx(struct efx_rx_queue *rx_queue)
514
-{
515
-	return rx_queue->efx->type->rx_probe(rx_queue);
516
-}
517
-static inline void efx_nic_init_rx(struct efx_rx_queue *rx_queue)
518
-{
519
-	rx_queue->efx->type->rx_init(rx_queue);
520
-}
521
-static inline void efx_nic_remove_rx(struct efx_rx_queue *rx_queue)
522
-{
523
-	rx_queue->efx->type->rx_remove(rx_queue);
524
-}
525
-static inline void efx_nic_notify_rx_desc(struct efx_rx_queue *rx_queue)
526
-{
527
-	rx_queue->efx->type->rx_write(rx_queue);
528
-}
529
-static inline void efx_nic_generate_fill_event(struct efx_rx_queue *rx_queue)
530
-{
531
-	rx_queue->efx->type->rx_defer_refill(rx_queue);
532
-}
533
-
534
-/* Event data path */
535
-static inline int efx_nic_probe_eventq(struct efx_channel *channel)
536
-{
537
-	return channel->efx->type->ev_probe(channel);
538
-}
539
-static inline int efx_nic_init_eventq(struct efx_channel *channel)
540
-{
541
-	return channel->efx->type->ev_init(channel);
542
-}
543
-static inline void efx_nic_fini_eventq(struct efx_channel *channel)
544
-{
545
-	channel->efx->type->ev_fini(channel);
546
-}
547
-static inline void efx_nic_remove_eventq(struct efx_channel *channel)
548
-{
549
-	channel->efx->type->ev_remove(channel);
550
-}
551
-static inline int
552
-efx_nic_process_eventq(struct efx_channel *channel, int quota)
553
-{
554
-	return channel->efx->type->ev_process(channel, quota);
555
-}
556
-static inline void efx_nic_eventq_read_ack(struct efx_channel *channel)
557
-{
558
-	channel->efx->type->ev_read_ack(channel);
559
-}
560
-void efx_nic_event_test_start(struct efx_channel *channel);
561312 
562313 /* Falcon/Siena queue operations */
563314 int efx_farch_tx_probe(struct efx_tx_queue *tx_queue);
....@@ -608,31 +359,6 @@
608359 #endif
609360 void efx_farch_filter_sync_rx_mode(struct efx_nic *efx);
610361 
611
-bool efx_nic_event_present(struct efx_channel *channel);
612
-
613
-/* Some statistics are computed as A - B where A and B each increase
614
- * linearly with some hardware counter(s) and the counters are read
615
- * asynchronously.  If the counters contributing to B are always read
616
- * after those contributing to A, the computed value may be lower than
617
- * the true value by some variable amount, and may decrease between
618
- * subsequent computations.
619
- *
620
- * We should never allow statistics to decrease or to exceed the true
621
- * value.  Since the computed value will never be greater than the
622
- * true value, we can achieve this by only storing the computed value
623
- * when it increases.
624
- */
625
-static inline void efx_update_diff_stat(u64 *stat, u64 diff)
626
-{
627
-	if ((s64)(diff - *stat) > 0)
628
-		*stat = diff;
629
-}
630
-
631
-/* Interrupts */
632
-int efx_nic_init_interrupt(struct efx_nic *efx);
633
-int efx_nic_irq_test_start(struct efx_nic *efx);
634
-void efx_nic_fini_interrupt(struct efx_nic *efx);
635
-
636362 /* Falcon/Siena interrupts */
637363 void efx_farch_irq_enable_master(struct efx_nic *efx);
638364 int efx_farch_irq_test_generate(struct efx_nic *efx);
....@@ -641,17 +367,7 @@
641367 irqreturn_t efx_farch_legacy_interrupt(int irq, void *dev_id);
642368 irqreturn_t efx_farch_fatal_interrupt(struct efx_nic *efx);
643369 
644
-static inline int efx_nic_event_test_irq_cpu(struct efx_channel *channel)
645
-{
646
-	return READ_ONCE(channel->event_test_cpu);
647
-}
648
-static inline int efx_nic_irq_test_irq_cpu(struct efx_nic *efx)
649
-{
650
-	return READ_ONCE(efx->last_irq_cpu);
651
-}
652
-
653370 /* Global Resources */
654
-int efx_nic_flush_queues(struct efx_nic *efx);
655371 void siena_prepare_flush(struct efx_nic *efx);
656372 int efx_farch_fini_dmaq(struct efx_nic *efx);
657373 void efx_farch_finish_flr(struct efx_nic *efx);
....@@ -661,34 +377,18 @@
661377 int falcon_reset_xaui(struct efx_nic *efx);
662378 void efx_farch_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw);
663379 void efx_farch_init_common(struct efx_nic *efx);
664
-void efx_ef10_handle_drain_event(struct efx_nic *efx);
665380 void efx_farch_rx_push_indir_table(struct efx_nic *efx);
666381 void efx_farch_rx_pull_indir_table(struct efx_nic *efx);
667
-
668
-int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
669
-			 unsigned int len, gfp_t gfp_flags);
670
-void efx_nic_free_buffer(struct efx_nic *efx, struct efx_buffer *buffer);
671382 
672383 /* Tests */
673384 struct efx_farch_register_test {
674385 	unsigned address;
675386 	efx_oword_t mask;
676387 };
388
+
677389 int efx_farch_test_registers(struct efx_nic *efx,
678390 			     const struct efx_farch_register_test *regs,
679391 			     size_t n_regs);
680
-
681
-size_t efx_nic_get_regs_len(struct efx_nic *efx);
682
-void efx_nic_get_regs(struct efx_nic *efx, void *buf);
683
-
684
-size_t efx_nic_describe_stats(const struct efx_hw_stat_desc *desc, size_t count,
685
-			      const unsigned long *mask, u8 *names);
686
-void efx_nic_update_stats(const struct efx_hw_stat_desc *desc, size_t count,
687
-			  const unsigned long *mask, u64 *stats,
688
-			  const void *dma_buf, bool accumulate);
689
-void efx_nic_fix_nodesc_drop_stat(struct efx_nic *efx, u64 *stat);
690
-
691
-#define EFX_MAX_FLUSH_TIME 5000
692392 
693393 void efx_farch_generate_event(struct efx_nic *efx, unsigned int evq,
694394 			      efx_qword_t *event);