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1 /* Intel Ethernet Switch Host Interface Driver
2 * Copyright(c) 2013 - 2015 Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
15 *
16 * Contact Information:
17 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
18 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
19 */
20
21 #ifndef _FM10K_H_
22 #define _FM10K_H_
23
24 #include <linux/types.h>
25 #include <linux/etherdevice.h>
26 #include <linux/cpumask.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/if_vlan.h>
29 #include <linux/pci.h>
30 #include <linux/net_tstamp.h>
31 #include <linux/clocksource.h>
32 #include <linux/ptp_clock_kernel.h>
33
34 #include "fm10k_pf.h"
35 #include "fm10k_vf.h"
36
37 #define FM10K_MAX_JUMBO_FRAME_SIZE 15342 /* Maximum supported size 15K */
38
39 #define MAX_QUEUES FM10K_MAX_QUEUES_PF
40
41 #define FM10K_MIN_RXD 128
42 #define FM10K_MAX_RXD 4096
43 #define FM10K_DEFAULT_RXD 256
44
45 #define FM10K_MIN_TXD 128
46 #define FM10K_MAX_TXD 4096
47 #define FM10K_DEFAULT_TXD 256
48 #define FM10K_DEFAULT_TX_WORK 256
49
50 #define FM10K_RXBUFFER_256 256
51 #define FM10K_RX_HDR_LEN FM10K_RXBUFFER_256
52 #define FM10K_RXBUFFER_2048 2048
53 #define FM10K_RX_BUFSZ FM10K_RXBUFFER_2048
54
55 /* How many Rx Buffers do we bundle into one write to the hardware ? */
56 #define FM10K_RX_BUFFER_WRITE 16 /* Must be power of 2 */
57
58 #define FM10K_MAX_STATIONS 63
59 struct fm10k_l2_accel {
60 int size;
61 u16 count;
62 u16 dglort;
63 struct rcu_head rcu;
64 struct net_device *macvlan[0];
65 };
66
67 enum fm10k_ring_state_t {
68 __FM10K_TX_DETECT_HANG,
69 __FM10K_HANG_CHECK_ARMED,
70 __FM10K_TX_XPS_INIT_DONE,
71 };
72
73 #define check_for_tx_hang(ring) \
74 test_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
75 #define set_check_for_tx_hang(ring) \
76 set_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
77 #define clear_check_for_tx_hang(ring) \
78 clear_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
79
80 struct fm10k_tx_buffer {
81 struct fm10k_tx_desc *next_to_watch;
82 struct sk_buff *skb;
83 unsigned int bytecount;
84 u16 gso_segs;
85 u16 tx_flags;
86 DEFINE_DMA_UNMAP_ADDR(dma);
87 DEFINE_DMA_UNMAP_LEN(len);
88 };
89
90 struct fm10k_rx_buffer {
91 dma_addr_t dma;
92 struct page *page;
93 u32 page_offset;
94 };
95
96 struct fm10k_queue_stats {
97 u64 packets;
98 u64 bytes;
99 };
100
101 struct fm10k_tx_queue_stats {
102 u64 restart_queue;
103 u64 csum_err;
104 u64 tx_busy;
105 u64 tx_done_old;
106 u64 csum_good;
107 };
108
109 struct fm10k_rx_queue_stats {
110 u64 alloc_failed;
111 u64 csum_err;
112 u64 errors;
113 u64 csum_good;
114 u64 switch_errors;
115 u64 drops;
116 u64 pp_errors;
117 u64 link_errors;
118 u64 length_errors;
119 };
120
121 struct fm10k_ring {
122 struct fm10k_q_vector *q_vector;/* backpointer to host q_vector */
123 struct net_device *netdev; /* netdev ring belongs to */
124 struct device *dev; /* device for DMA mapping */
125 struct fm10k_l2_accel __rcu *l2_accel; /* L2 acceleration list */
126 void *desc; /* descriptor ring memory */
127 union {
128 struct fm10k_tx_buffer *tx_buffer;
129 struct fm10k_rx_buffer *rx_buffer;
130 };
131 u32 __iomem *tail;
132 unsigned long state;
133 dma_addr_t dma; /* phys. address of descriptor ring */
134 unsigned int size; /* length in bytes */
135
136 u8 queue_index; /* needed for queue management */
137 u8 reg_idx; /* holds the special value that gets
138 * the hardware register offset
139 * associated with this ring, which is
140 * different for DCB and RSS modes
141 */
142 u8 qos_pc; /* priority class of queue */
143 u16 vid; /* default VLAN ID of queue */
144 u16 count; /* amount of descriptors */
145
146 u16 next_to_alloc;
147 u16 next_to_use;
148 u16 next_to_clean;
149
150 struct fm10k_queue_stats stats;
151 struct u64_stats_sync syncp;
152 union {
153 /* Tx */
154 struct fm10k_tx_queue_stats tx_stats;
155 /* Rx */
156 struct {
157 struct fm10k_rx_queue_stats rx_stats;
158 struct sk_buff *skb;
159 };
160 };
161 } ____cacheline_internodealigned_in_smp;
162
163 struct fm10k_ring_container {
164 struct fm10k_ring *ring; /* pointer to linked list of rings */
165 unsigned int total_bytes; /* total bytes processed this int */
166 unsigned int total_packets; /* total packets processed this int */
167 u16 work_limit; /* total work allowed per interrupt */
168 u16 itr; /* interrupt throttle rate value */
169 u8 itr_scale; /* ITR adjustment based on PCI speed */
170 u8 count; /* total number of rings in vector */
171 };
172
173 #define FM10K_ITR_MAX 0x0FFF /* maximum value for ITR */
174 #define FM10K_ITR_10K 100 /* 100us */
175 #define FM10K_ITR_20K 50 /* 50us */
176 #define FM10K_ITR_40K 25 /* 25us */
177 #define FM10K_ITR_ADAPTIVE 0x8000 /* adaptive interrupt moderation flag */
178
179 #define ITR_IS_ADAPTIVE(itr) (!!(itr & FM10K_ITR_ADAPTIVE))
180
181 #define FM10K_TX_ITR_DEFAULT FM10K_ITR_40K
182 #define FM10K_RX_ITR_DEFAULT FM10K_ITR_20K
183 #define FM10K_ITR_ENABLE (FM10K_ITR_AUTOMASK | FM10K_ITR_MASK_CLEAR)
184
185 static inline struct netdev_queue *txring_txq(const struct fm10k_ring *ring)
186 {
187 return &ring->netdev->_tx[ring->queue_index];
188 }
189
190 /* iterator for handling rings in ring container */
191 #define fm10k_for_each_ring(pos, head) \
192 for (pos = &(head).ring[(head).count]; (--pos) >= (head).ring;)
193
194 #define MAX_Q_VECTORS 256
195 #define MIN_Q_VECTORS 1
196 enum fm10k_non_q_vectors {
197 FM10K_MBX_VECTOR,
198 #define NON_Q_VECTORS_VF NON_Q_VECTORS_PF
199 NON_Q_VECTORS_PF
200 };
201
202 #define NON_Q_VECTORS(hw) (((hw)->mac.type == fm10k_mac_pf) ? \
203 NON_Q_VECTORS_PF : \
204 NON_Q_VECTORS_VF)
205 #define MIN_MSIX_COUNT(hw) (MIN_Q_VECTORS + NON_Q_VECTORS(hw))
206
207 struct fm10k_q_vector {
208 struct fm10k_intfc *interface;
209 u32 __iomem *itr; /* pointer to ITR register for this vector */
210 u16 v_idx; /* index of q_vector within interface array */
211 struct fm10k_ring_container rx, tx;
212
213 struct napi_struct napi;
214 cpumask_t affinity_mask;
215 char name[IFNAMSIZ + 9];
216
217 #ifdef CONFIG_DEBUG_FS
218 struct dentry *dbg_q_vector;
219 #endif /* CONFIG_DEBUG_FS */
220 struct rcu_head rcu; /* to avoid race with update stats on free */
221
222 /* for dynamic allocation of rings associated with this q_vector */
223 struct fm10k_ring ring[0] ____cacheline_internodealigned_in_smp;
224 };
225
226 enum fm10k_ring_f_enum {
227 RING_F_RSS,
228 RING_F_QOS,
229 RING_F_ARRAY_SIZE /* must be last in enum set */
230 };
231
232 struct fm10k_ring_feature {
233 u16 limit; /* upper limit on feature indices */
234 u16 indices; /* current value of indices */
235 u16 mask; /* Mask used for feature to ring mapping */
236 u16 offset; /* offset to start of feature */
237 };
238
239 struct fm10k_iov_data {
240 unsigned int num_vfs;
241 unsigned int next_vf_mbx;
242 struct rcu_head rcu;
243 struct fm10k_vf_info vf_info[0];
244 };
245
246 #define fm10k_vxlan_port_for_each(vp, intfc) \
247 list_for_each_entry(vp, &(intfc)->vxlan_port, list)
248 struct fm10k_vxlan_port {
249 struct list_head list;
250 sa_family_t sa_family;
251 __be16 port;
252 };
253
254 /* one work queue for entire driver */
255 extern struct workqueue_struct *fm10k_workqueue;
256
257 struct fm10k_intfc {
258 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
259 struct net_device *netdev;
260 struct fm10k_l2_accel *l2_accel; /* pointer to L2 acceleration list */
261 struct pci_dev *pdev;
262 unsigned long state;
263
264 u32 flags;
265 #define FM10K_FLAG_RESET_REQUESTED (u32)(BIT(0))
266 #define FM10K_FLAG_RSS_FIELD_IPV4_UDP (u32)(BIT(1))
267 #define FM10K_FLAG_RSS_FIELD_IPV6_UDP (u32)(BIT(2))
268 #define FM10K_FLAG_RX_TS_ENABLED (u32)(BIT(3))
269 #define FM10K_FLAG_SWPRI_CONFIG (u32)(BIT(4))
270 #define FM10K_FLAG_DEBUG_STATS (u32)(BIT(5))
271 int xcast_mode;
272
273 /* Tx fast path data */
274 int num_tx_queues;
275 u16 tx_itr;
276
277 /* Rx fast path data */
278 int num_rx_queues;
279 u16 rx_itr;
280
281 /* TX */
282 struct fm10k_ring *tx_ring[MAX_QUEUES] ____cacheline_aligned_in_smp;
283
284 u64 restart_queue;
285 u64 tx_busy;
286 u64 tx_csum_errors;
287 u64 alloc_failed;
288 u64 rx_csum_errors;
289
290 u64 tx_bytes_nic;
291 u64 tx_packets_nic;
292 u64 rx_bytes_nic;
293 u64 rx_packets_nic;
294 u64 rx_drops_nic;
295 u64 rx_overrun_pf;
296 u64 rx_overrun_vf;
297
298 /* Debug Statistics */
299 u64 hw_sm_mbx_full;
300 u64 hw_csum_tx_good;
301 u64 hw_csum_rx_good;
302 u64 rx_switch_errors;
303 u64 rx_drops;
304 u64 rx_pp_errors;
305 u64 rx_link_errors;
306 u64 rx_length_errors;
307
308 u32 tx_timeout_count;
309
310 /* RX */
311 struct fm10k_ring *rx_ring[MAX_QUEUES];
312
313 /* Queueing vectors */
314 struct fm10k_q_vector *q_vector[MAX_Q_VECTORS];
315 struct msix_entry *msix_entries;
316 int num_q_vectors; /* current number of q_vectors for device */
317 struct fm10k_ring_feature ring_feature[RING_F_ARRAY_SIZE];
318
319 /* SR-IOV information management structure */
320 struct fm10k_iov_data *iov_data;
321
322 struct fm10k_hw_stats stats;
323 struct fm10k_hw hw;
324 u32 __iomem *uc_addr;
325 u32 __iomem *sw_addr;
326 u16 msg_enable;
327 u16 tx_ring_count;
328 u16 rx_ring_count;
329 struct timer_list service_timer;
330 struct work_struct service_task;
331 unsigned long next_stats_update;
332 unsigned long next_tx_hang_check;
333 unsigned long last_reset;
334 unsigned long link_down_event;
335 bool host_ready;
336
337 u32 reta[FM10K_RETA_SIZE];
338 u32 rssrk[FM10K_RSSRK_SIZE];
339
340 /* VXLAN port tracking information */
341 struct list_head vxlan_port;
342
343 #ifdef CONFIG_DEBUG_FS
344 struct dentry *dbg_intfc;
345
346 #endif /* CONFIG_DEBUG_FS */
347 struct ptp_clock_info ptp_caps;
348 struct ptp_clock *ptp_clock;
349
350 struct sk_buff_head ts_tx_skb_queue;
351 u32 tx_hwtstamp_timeouts;
352
353 struct hwtstamp_config ts_config;
354 /* We are unable to actually adjust the clock beyond the frequency
355 * value. Once the clock is started there is no resetting it. As
356 * such we maintain a separate offset from the actual hardware clock
357 * to allow for offset adjustment.
358 */
359 s64 ptp_adjust;
360 rwlock_t systime_lock;
361 #ifdef CONFIG_DCB
362 u8 pfc_en;
363 #endif
364 u8 rx_pause;
365
366 /* GLORT resources in use by PF */
367 u16 glort;
368 u16 glort_count;
369
370 /* VLAN ID for updating multicast/unicast lists */
371 u16 vid;
372 };
373
374 enum fm10k_state_t {
375 __FM10K_RESETTING,
376 __FM10K_DOWN,
377 __FM10K_SERVICE_SCHED,
378 __FM10K_SERVICE_DISABLE,
379 __FM10K_MBX_LOCK,
380 __FM10K_LINK_DOWN,
381 };
382
383 static inline void fm10k_mbx_lock(struct fm10k_intfc *interface)
384 {
385 /* busy loop if we cannot obtain the lock as some calls
386 * such as ndo_set_rx_mode may be made in atomic context
387 */
388 while (test_and_set_bit(__FM10K_MBX_LOCK, &interface->state))
389 udelay(20);
390 }
391
392 static inline void fm10k_mbx_unlock(struct fm10k_intfc *interface)
393 {
394 /* flush memory to make sure state is correct */
395 smp_mb__before_atomic();
396 clear_bit(__FM10K_MBX_LOCK, &interface->state);
397 }
398
399 static inline int fm10k_mbx_trylock(struct fm10k_intfc *interface)
400 {
401 return !test_and_set_bit(__FM10K_MBX_LOCK, &interface->state);
402 }
403
404 /* fm10k_test_staterr - test bits in Rx descriptor status and error fields */
405 static inline __le32 fm10k_test_staterr(union fm10k_rx_desc *rx_desc,
406 const u32 stat_err_bits)
407 {
408 return rx_desc->d.staterr & cpu_to_le32(stat_err_bits);
409 }
410
411 /* fm10k_desc_unused - calculate if we have unused descriptors */
412 static inline u16 fm10k_desc_unused(struct fm10k_ring *ring)
413 {
414 s16 unused = ring->next_to_clean - ring->next_to_use - 1;
415
416 return likely(unused < 0) ? unused + ring->count : unused;
417 }
418
419 #define FM10K_TX_DESC(R, i) \
420 (&(((struct fm10k_tx_desc *)((R)->desc))[i]))
421 #define FM10K_RX_DESC(R, i) \
422 (&(((union fm10k_rx_desc *)((R)->desc))[i]))
423
424 #define FM10K_MAX_TXD_PWR 14
425 #define FM10K_MAX_DATA_PER_TXD BIT(FM10K_MAX_TXD_PWR)
426
427 /* Tx Descriptors needed, worst case */
428 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), FM10K_MAX_DATA_PER_TXD)
429 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
430
431 enum fm10k_tx_flags {
432 /* Tx offload flags */
433 FM10K_TX_FLAGS_CSUM = 0x01,
434 };
435
436 /* This structure is stored as little endian values as that is the native
437 * format of the Rx descriptor. The ordering of these fields is reversed
438 * from the actual ftag header to allow for a single bswap to take care
439 * of placing all of the values in network order
440 */
441 union fm10k_ftag_info {
442 __le64 ftag;
443 struct {
444 /* dglort and sglort combined into a single 32bit desc read */
445 __le32 glort;
446 /* upper 16 bits of VLAN are reserved 0 for swpri_type_user */
447 __le32 vlan;
448 } d;
449 struct {
450 __le16 dglort;
451 __le16 sglort;
452 __le16 vlan;
453 __le16 swpri_type_user;
454 } w;
455 };
456
457 struct fm10k_cb {
458 union {
459 __le64 tstamp;
460 unsigned long ts_tx_timeout;
461 };
462 union fm10k_ftag_info fi;
463 };
464
465 #define FM10K_CB(skb) ((struct fm10k_cb *)(skb)->cb)
466
467 /* main */
468 extern char fm10k_driver_name[];
469 extern const char fm10k_driver_version[];
470 int fm10k_init_queueing_scheme(struct fm10k_intfc *interface);
471 void fm10k_clear_queueing_scheme(struct fm10k_intfc *interface);
472 __be16 fm10k_tx_encap_offload(struct sk_buff *skb);
473 netdev_tx_t fm10k_xmit_frame_ring(struct sk_buff *skb,
474 struct fm10k_ring *tx_ring);
475 void fm10k_tx_timeout_reset(struct fm10k_intfc *interface);
476 bool fm10k_check_tx_hang(struct fm10k_ring *tx_ring);
477 void fm10k_alloc_rx_buffers(struct fm10k_ring *rx_ring, u16 cleaned_count);
478
479 /* PCI */
480 void fm10k_mbx_free_irq(struct fm10k_intfc *);
481 int fm10k_mbx_request_irq(struct fm10k_intfc *);
482 void fm10k_qv_free_irq(struct fm10k_intfc *interface);
483 int fm10k_qv_request_irq(struct fm10k_intfc *interface);
484 int fm10k_register_pci_driver(void);
485 void fm10k_unregister_pci_driver(void);
486 void fm10k_up(struct fm10k_intfc *interface);
487 void fm10k_down(struct fm10k_intfc *interface);
488 void fm10k_update_stats(struct fm10k_intfc *interface);
489 void fm10k_service_event_schedule(struct fm10k_intfc *interface);
490 void fm10k_update_rx_drop_en(struct fm10k_intfc *interface);
491 #ifdef CONFIG_NET_POLL_CONTROLLER
492 void fm10k_netpoll(struct net_device *netdev);
493 #endif
494
495 /* Netdev */
496 struct net_device *fm10k_alloc_netdev(const struct fm10k_info *info);
497 int fm10k_setup_rx_resources(struct fm10k_ring *);
498 int fm10k_setup_tx_resources(struct fm10k_ring *);
499 void fm10k_free_rx_resources(struct fm10k_ring *);
500 void fm10k_free_tx_resources(struct fm10k_ring *);
501 void fm10k_clean_all_rx_rings(struct fm10k_intfc *);
502 void fm10k_clean_all_tx_rings(struct fm10k_intfc *);
503 void fm10k_unmap_and_free_tx_resource(struct fm10k_ring *,
504 struct fm10k_tx_buffer *);
505 void fm10k_restore_rx_state(struct fm10k_intfc *);
506 void fm10k_reset_rx_state(struct fm10k_intfc *);
507 int fm10k_setup_tc(struct net_device *dev, u8 tc);
508 int fm10k_open(struct net_device *netdev);
509 int fm10k_close(struct net_device *netdev);
510
511 /* Ethtool */
512 void fm10k_set_ethtool_ops(struct net_device *dev);
513 u32 fm10k_get_reta_size(struct net_device *netdev);
514 void fm10k_write_reta(struct fm10k_intfc *interface, const u32 *indir);
515
516 /* IOV */
517 s32 fm10k_iov_event(struct fm10k_intfc *interface);
518 s32 fm10k_iov_mbx(struct fm10k_intfc *interface);
519 void fm10k_iov_suspend(struct pci_dev *pdev);
520 int fm10k_iov_resume(struct pci_dev *pdev);
521 void fm10k_iov_disable(struct pci_dev *pdev);
522 int fm10k_iov_configure(struct pci_dev *pdev, int num_vfs);
523 s32 fm10k_iov_update_pvid(struct fm10k_intfc *interface, u16 glort, u16 pvid);
524 int fm10k_ndo_set_vf_mac(struct net_device *netdev, int vf_idx, u8 *mac);
525 int fm10k_ndo_set_vf_vlan(struct net_device *netdev,
526 int vf_idx, u16 vid, u8 qos);
527 int fm10k_ndo_set_vf_bw(struct net_device *netdev, int vf_idx, int rate,
528 int unused);
529 int fm10k_ndo_get_vf_config(struct net_device *netdev,
530 int vf_idx, struct ifla_vf_info *ivi);
531
532 /* DebugFS */
533 #ifdef CONFIG_DEBUG_FS
534 void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector);
535 void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector);
536 void fm10k_dbg_intfc_init(struct fm10k_intfc *interface);
537 void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface);
538 void fm10k_dbg_init(void);
539 void fm10k_dbg_exit(void);
540 #else
541 static inline void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector) {}
542 static inline void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector) {}
543 static inline void fm10k_dbg_intfc_init(struct fm10k_intfc *interface) {}
544 static inline void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface) {}
545 static inline void fm10k_dbg_init(void) {}
546 static inline void fm10k_dbg_exit(void) {}
547 #endif /* CONFIG_DEBUG_FS */
548
549 /* Time Stamping */
550 void fm10k_systime_to_hwtstamp(struct fm10k_intfc *interface,
551 struct skb_shared_hwtstamps *hwtstamp,
552 u64 systime);
553 void fm10k_ts_tx_enqueue(struct fm10k_intfc *interface, struct sk_buff *skb);
554 void fm10k_ts_tx_hwtstamp(struct fm10k_intfc *interface, __le16 dglort,
555 u64 systime);
556 void fm10k_ts_reset(struct fm10k_intfc *interface);
557 void fm10k_ts_init(struct fm10k_intfc *interface);
558 void fm10k_ts_tx_subtask(struct fm10k_intfc *interface);
559 void fm10k_ptp_register(struct fm10k_intfc *interface);
560 void fm10k_ptp_unregister(struct fm10k_intfc *interface);
561 int fm10k_get_ts_config(struct net_device *netdev, struct ifreq *ifr);
562 int fm10k_set_ts_config(struct net_device *netdev, struct ifreq *ifr);
563
564 /* DCB */
565 #ifdef CONFIG_DCB
566 void fm10k_dcbnl_set_ops(struct net_device *dev);
567 #else
568 static inline void fm10k_dcbnl_set_ops(struct net_device *dev) {}
569 #endif
570 #endif /* _FM10K_H_ */