1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
3 
4 #ifndef _IXGBEVF_H_
5 #define _IXGBEVF_H_
6 
7 #include <linux/types.h>
8 #include <linux/bitops.h>
9 #include <linux/timer.h>
10 #include <linux/io.h>
11 #include <linux/netdevice.h>
12 #include <linux/if_vlan.h>
13 #include <linux/u64_stats_sync.h>
14 #include <net/xdp.h>
15 
16 #include "vf.h"
17 #include "ipsec.h"
18 
19 #define IXGBE_MAX_TXD_PWR	14
20 #define IXGBE_MAX_DATA_PER_TXD	BIT(IXGBE_MAX_TXD_PWR)
21 
22 /* Tx Descriptors needed, worst case */
23 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
24 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
25 
26 /* wrapper around a pointer to a socket buffer,
27  * so a DMA handle can be stored along with the buffer
28  */
29 struct ixgbevf_tx_buffer {
30 	union ixgbe_adv_tx_desc *next_to_watch;
31 	unsigned long time_stamp;
32 	union {
33 		struct sk_buff *skb;
34 		/* XDP uses address ptr on irq_clean */
35 		void *data;
36 	};
37 	unsigned int bytecount;
38 	unsigned short gso_segs;
39 	__be16 protocol;
40 	DEFINE_DMA_UNMAP_ADDR(dma);
41 	DEFINE_DMA_UNMAP_LEN(len);
42 	u32 tx_flags;
43 };
44 
45 struct ixgbevf_rx_buffer {
46 	dma_addr_t dma;
47 	struct page *page;
48 #if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
49 	__u32 page_offset;
50 #else
51 	__u16 page_offset;
52 #endif
53 	__u16 pagecnt_bias;
54 };
55 
56 struct ixgbevf_stats {
57 	u64 packets;
58 	u64 bytes;
59 };
60 
61 struct ixgbevf_tx_queue_stats {
62 	u64 restart_queue;
63 	u64 tx_busy;
64 	u64 tx_done_old;
65 };
66 
67 struct ixgbevf_rx_queue_stats {
68 	u64 alloc_rx_page_failed;
69 	u64 alloc_rx_buff_failed;
70 	u64 alloc_rx_page;
71 	u64 csum_err;
72 };
73 
74 enum ixgbevf_ring_state_t {
75 	__IXGBEVF_RX_3K_BUFFER,
76 	__IXGBEVF_RX_BUILD_SKB_ENABLED,
77 	__IXGBEVF_TX_DETECT_HANG,
78 	__IXGBEVF_HANG_CHECK_ARMED,
79 	__IXGBEVF_TX_XDP_RING,
80 	__IXGBEVF_TX_XDP_RING_PRIMED,
81 };
82 
83 #define ring_is_xdp(ring) \
84 		test_bit(__IXGBEVF_TX_XDP_RING, &(ring)->state)
85 #define set_ring_xdp(ring) \
86 		set_bit(__IXGBEVF_TX_XDP_RING, &(ring)->state)
87 #define clear_ring_xdp(ring) \
88 		clear_bit(__IXGBEVF_TX_XDP_RING, &(ring)->state)
89 
90 struct ixgbevf_ring {
91 	struct ixgbevf_ring *next;
92 	struct ixgbevf_q_vector *q_vector;	/* backpointer to q_vector */
93 	struct net_device *netdev;
94 	struct bpf_prog *xdp_prog;
95 	struct device *dev;
96 	void *desc;			/* descriptor ring memory */
97 	dma_addr_t dma;			/* phys. address of descriptor ring */
98 	unsigned int size;		/* length in bytes */
99 	u16 count;			/* amount of descriptors */
100 	u16 next_to_use;
101 	u16 next_to_clean;
102 	u16 next_to_alloc;
103 
104 	union {
105 		struct ixgbevf_tx_buffer *tx_buffer_info;
106 		struct ixgbevf_rx_buffer *rx_buffer_info;
107 	};
108 	unsigned long state;
109 	struct ixgbevf_stats stats;
110 	struct u64_stats_sync syncp;
111 	union {
112 		struct ixgbevf_tx_queue_stats tx_stats;
113 		struct ixgbevf_rx_queue_stats rx_stats;
114 	};
115 	struct xdp_rxq_info xdp_rxq;
116 	u64 hw_csum_rx_error;
117 	u8 __iomem *tail;
118 	struct sk_buff *skb;
119 
120 	/* holds the special value that gets the hardware register offset
121 	 * associated with this ring, which is different for DCB and RSS modes
122 	 */
123 	u16 reg_idx;
124 	int queue_index; /* needed for multiqueue queue management */
125 } ____cacheline_internodealigned_in_smp;
126 
127 /* How many Rx Buffers do we bundle into one write to the hardware ? */
128 #define IXGBEVF_RX_BUFFER_WRITE	16	/* Must be power of 2 */
129 
130 #define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
131 #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
132 #define MAX_XDP_QUEUES IXGBE_VF_MAX_TX_QUEUES
133 #define IXGBEVF_MAX_RSS_QUEUES		2
134 #define IXGBEVF_82599_RETA_SIZE		128	/* 128 entries */
135 #define IXGBEVF_X550_VFRETA_SIZE	64	/* 64 entries */
136 #define IXGBEVF_RSS_HASH_KEY_SIZE	40
137 #define IXGBEVF_VFRSSRK_REGS		10	/* 10 registers for RSS key */
138 
139 #define IXGBEVF_DEFAULT_TXD	1024
140 #define IXGBEVF_DEFAULT_RXD	512
141 #define IXGBEVF_MAX_TXD		4096
142 #define IXGBEVF_MIN_TXD		64
143 #define IXGBEVF_MAX_RXD		4096
144 #define IXGBEVF_MIN_RXD		64
145 
146 /* Supported Rx Buffer Sizes */
147 #define IXGBEVF_RXBUFFER_256	256    /* Used for packet split */
148 #define IXGBEVF_RXBUFFER_2048	2048
149 #define IXGBEVF_RXBUFFER_3072	3072
150 
151 #define IXGBEVF_RX_HDR_SIZE	IXGBEVF_RXBUFFER_256
152 
153 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
154 
155 #define IXGBEVF_SKB_PAD		(NET_SKB_PAD + NET_IP_ALIGN)
156 #if (PAGE_SIZE < 8192)
157 #define IXGBEVF_MAX_FRAME_BUILD_SKB \
158 	(SKB_WITH_OVERHEAD(IXGBEVF_RXBUFFER_2048) - IXGBEVF_SKB_PAD)
159 #else
160 #define IXGBEVF_MAX_FRAME_BUILD_SKB	IXGBEVF_RXBUFFER_2048
161 #endif
162 
163 #define IXGBE_TX_FLAGS_CSUM		BIT(0)
164 #define IXGBE_TX_FLAGS_VLAN		BIT(1)
165 #define IXGBE_TX_FLAGS_TSO		BIT(2)
166 #define IXGBE_TX_FLAGS_IPV4		BIT(3)
167 #define IXGBE_TX_FLAGS_IPSEC		BIT(4)
168 #define IXGBE_TX_FLAGS_VLAN_MASK	0xffff0000
169 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK	0x0000e000
170 #define IXGBE_TX_FLAGS_VLAN_SHIFT	16
171 
172 #define ring_uses_large_buffer(ring) \
173 	test_bit(__IXGBEVF_RX_3K_BUFFER, &(ring)->state)
174 #define set_ring_uses_large_buffer(ring) \
175 	set_bit(__IXGBEVF_RX_3K_BUFFER, &(ring)->state)
176 #define clear_ring_uses_large_buffer(ring) \
177 	clear_bit(__IXGBEVF_RX_3K_BUFFER, &(ring)->state)
178 
179 #define ring_uses_build_skb(ring) \
180 	test_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
181 #define set_ring_build_skb_enabled(ring) \
182 	set_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
183 #define clear_ring_build_skb_enabled(ring) \
184 	clear_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
185 
186 static inline unsigned int ixgbevf_rx_bufsz(struct ixgbevf_ring *ring)
187 {
188 #if (PAGE_SIZE < 8192)
189 	if (ring_uses_large_buffer(ring))
190 		return IXGBEVF_RXBUFFER_3072;
191 
192 	if (ring_uses_build_skb(ring))
193 		return IXGBEVF_MAX_FRAME_BUILD_SKB;
194 #endif
195 	return IXGBEVF_RXBUFFER_2048;
196 }
197 
198 static inline unsigned int ixgbevf_rx_pg_order(struct ixgbevf_ring *ring)
199 {
200 #if (PAGE_SIZE < 8192)
201 	if (ring_uses_large_buffer(ring))
202 		return 1;
203 #endif
204 	return 0;
205 }
206 
207 #define ixgbevf_rx_pg_size(_ring) (PAGE_SIZE << ixgbevf_rx_pg_order(_ring))
208 
209 #define check_for_tx_hang(ring) \
210 	test_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
211 #define set_check_for_tx_hang(ring) \
212 	set_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
213 #define clear_check_for_tx_hang(ring) \
214 	clear_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
215 
216 struct ixgbevf_ring_container {
217 	struct ixgbevf_ring *ring;	/* pointer to linked list of rings */
218 	unsigned int total_bytes;	/* total bytes processed this int */
219 	unsigned int total_packets;	/* total packets processed this int */
220 	u8 count;			/* total number of rings in vector */
221 	u8 itr;				/* current ITR setting for ring */
222 };
223 
224 /* iterator for handling rings in ring container */
225 #define ixgbevf_for_each_ring(pos, head) \
226 	for (pos = (head).ring; pos != NULL; pos = pos->next)
227 
228 /* MAX_MSIX_Q_VECTORS of these are allocated,
229  * but we only use one per queue-specific vector.
230  */
231 struct ixgbevf_q_vector {
232 	struct ixgbevf_adapter *adapter;
233 	/* index of q_vector within array, also used for finding the bit in
234 	 * EICR and friends that represents the vector for this ring
235 	 */
236 	u16 v_idx;
237 	u16 itr; /* Interrupt throttle rate written to EITR */
238 	struct napi_struct napi;
239 	struct ixgbevf_ring_container rx, tx;
240 	struct rcu_head rcu;    /* to avoid race with update stats on free */
241 	char name[IFNAMSIZ + 9];
242 
243 	/* for dynamic allocation of rings associated with this q_vector */
244 	struct ixgbevf_ring ring[0] ____cacheline_internodealigned_in_smp;
245 #ifdef CONFIG_NET_RX_BUSY_POLL
246 	unsigned int state;
247 #define IXGBEVF_QV_STATE_IDLE		0
248 #define IXGBEVF_QV_STATE_NAPI		1    /* NAPI owns this QV */
249 #define IXGBEVF_QV_STATE_POLL		2    /* poll owns this QV */
250 #define IXGBEVF_QV_STATE_DISABLED	4    /* QV is disabled */
251 #define IXGBEVF_QV_OWNED	(IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
252 #define IXGBEVF_QV_LOCKED	(IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
253 #define IXGBEVF_QV_STATE_NAPI_YIELD	8    /* NAPI yielded this QV */
254 #define IXGBEVF_QV_STATE_POLL_YIELD	16   /* poll yielded this QV */
255 #define IXGBEVF_QV_YIELD	(IXGBEVF_QV_STATE_NAPI_YIELD | \
256 				 IXGBEVF_QV_STATE_POLL_YIELD)
257 #define IXGBEVF_QV_USER_PEND	(IXGBEVF_QV_STATE_POLL | \
258 				 IXGBEVF_QV_STATE_POLL_YIELD)
259 	spinlock_t lock;
260 #endif /* CONFIG_NET_RX_BUSY_POLL */
261 };
262 
263 /* microsecond values for various ITR rates shifted by 2 to fit itr register
264  * with the first 3 bits reserved 0
265  */
266 #define IXGBE_MIN_RSC_ITR	24
267 #define IXGBE_100K_ITR		40
268 #define IXGBE_20K_ITR		200
269 #define IXGBE_12K_ITR		336
270 
271 /* Helper macros to switch between ints/sec and what the register uses.
272  * And yes, it's the same math going both ways.  The lowest value
273  * supported by all of the ixgbe hardware is 8.
274  */
275 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
276 	((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
277 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
278 
279 /* ixgbevf_test_staterr - tests bits in Rx descriptor status and error fields */
280 static inline __le32 ixgbevf_test_staterr(union ixgbe_adv_rx_desc *rx_desc,
281 					  const u32 stat_err_bits)
282 {
283 	return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
284 }
285 
286 static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
287 {
288 	u16 ntc = ring->next_to_clean;
289 	u16 ntu = ring->next_to_use;
290 
291 	return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
292 }
293 
294 static inline void ixgbevf_write_tail(struct ixgbevf_ring *ring, u32 value)
295 {
296 	writel(value, ring->tail);
297 }
298 
299 #define IXGBEVF_RX_DESC(R, i)	\
300 	(&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
301 #define IXGBEVF_TX_DESC(R, i)	\
302 	(&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
303 #define IXGBEVF_TX_CTXTDESC(R, i)	\
304 	(&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
305 
306 #define IXGBE_MAX_JUMBO_FRAME_SIZE	9728 /* Maximum Supported Size 9.5KB */
307 
308 #define OTHER_VECTOR	1
309 #define NON_Q_VECTORS	(OTHER_VECTOR)
310 
311 #define MAX_MSIX_Q_VECTORS	2
312 
313 #define MIN_MSIX_Q_VECTORS	1
314 #define MIN_MSIX_COUNT		(MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
315 
316 #define IXGBEVF_RX_DMA_ATTR \
317 	(DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
318 
319 /* board specific private data structure */
320 struct ixgbevf_adapter {
321 	/* this field must be first, see ixgbevf_process_skb_fields */
322 	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
323 
324 	struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
325 
326 	/* Interrupt Throttle Rate */
327 	u16 rx_itr_setting;
328 	u16 tx_itr_setting;
329 
330 	/* interrupt masks */
331 	u32 eims_enable_mask;
332 	u32 eims_other;
333 
334 	/* XDP */
335 	int num_xdp_queues;
336 	struct ixgbevf_ring *xdp_ring[MAX_XDP_QUEUES];
337 
338 	/* TX */
339 	int num_tx_queues;
340 	struct ixgbevf_ring *tx_ring[MAX_TX_QUEUES]; /* One per active queue */
341 	u64 restart_queue;
342 	u32 tx_timeout_count;
343 	u64 tx_ipsec;
344 
345 	/* RX */
346 	int num_rx_queues;
347 	struct ixgbevf_ring *rx_ring[MAX_TX_QUEUES]; /* One per active queue */
348 	u64 hw_csum_rx_error;
349 	u64 hw_rx_no_dma_resources;
350 	int num_msix_vectors;
351 	u64 alloc_rx_page_failed;
352 	u64 alloc_rx_buff_failed;
353 	u64 alloc_rx_page;
354 	u64 rx_ipsec;
355 
356 	struct msix_entry *msix_entries;
357 
358 	/* OS defined structs */
359 	struct net_device *netdev;
360 	struct bpf_prog *xdp_prog;
361 	struct pci_dev *pdev;
362 
363 	/* structs defined in ixgbe_vf.h */
364 	struct ixgbe_hw hw;
365 	u16 msg_enable;
366 	/* Interrupt Throttle Rate */
367 	u32 eitr_param;
368 
369 	struct ixgbevf_hw_stats stats;
370 
371 	unsigned long state;
372 	u64 tx_busy;
373 	unsigned int tx_ring_count;
374 	unsigned int xdp_ring_count;
375 	unsigned int rx_ring_count;
376 
377 	u8 __iomem *io_addr; /* Mainly for iounmap use */
378 	u32 link_speed;
379 	bool link_up;
380 
381 	struct timer_list service_timer;
382 	struct work_struct service_task;
383 
384 	spinlock_t mbx_lock;
385 	unsigned long last_reset;
386 
387 	u32 *rss_key;
388 	u8 rss_indir_tbl[IXGBEVF_X550_VFRETA_SIZE];
389 	u32 flags;
390 #define IXGBEVF_FLAGS_LEGACY_RX		BIT(1)
391 
392 #ifdef CONFIG_XFRM
393 	struct ixgbevf_ipsec *ipsec;
394 #endif /* CONFIG_XFRM */
395 };
396 
397 enum ixbgevf_state_t {
398 	__IXGBEVF_TESTING,
399 	__IXGBEVF_RESETTING,
400 	__IXGBEVF_DOWN,
401 	__IXGBEVF_DISABLED,
402 	__IXGBEVF_REMOVING,
403 	__IXGBEVF_SERVICE_SCHED,
404 	__IXGBEVF_SERVICE_INITED,
405 	__IXGBEVF_RESET_REQUESTED,
406 	__IXGBEVF_QUEUE_RESET_REQUESTED,
407 };
408 
409 enum ixgbevf_boards {
410 	board_82599_vf,
411 	board_82599_vf_hv,
412 	board_X540_vf,
413 	board_X540_vf_hv,
414 	board_X550_vf,
415 	board_X550_vf_hv,
416 	board_X550EM_x_vf,
417 	board_X550EM_x_vf_hv,
418 	board_x550em_a_vf,
419 };
420 
421 enum ixgbevf_xcast_modes {
422 	IXGBEVF_XCAST_MODE_NONE = 0,
423 	IXGBEVF_XCAST_MODE_MULTI,
424 	IXGBEVF_XCAST_MODE_ALLMULTI,
425 	IXGBEVF_XCAST_MODE_PROMISC,
426 };
427 
428 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
429 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
430 extern const struct ixgbevf_info ixgbevf_X550_vf_info;
431 extern const struct ixgbevf_info ixgbevf_X550EM_x_vf_info;
432 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
433 extern const struct ixgbevf_info ixgbevf_x550em_a_vf_info;
434 
435 extern const struct ixgbevf_info ixgbevf_82599_vf_hv_info;
436 extern const struct ixgbevf_info ixgbevf_X540_vf_hv_info;
437 extern const struct ixgbevf_info ixgbevf_X550_vf_hv_info;
438 extern const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info;
439 extern const struct ixgbe_mbx_operations ixgbevf_hv_mbx_ops;
440 
441 /* needed by ethtool.c */
442 extern const char ixgbevf_driver_name[];
443 extern const char ixgbevf_driver_version[];
444 
445 int ixgbevf_open(struct net_device *netdev);
446 int ixgbevf_close(struct net_device *netdev);
447 void ixgbevf_up(struct ixgbevf_adapter *adapter);
448 void ixgbevf_down(struct ixgbevf_adapter *adapter);
449 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
450 void ixgbevf_reset(struct ixgbevf_adapter *adapter);
451 void ixgbevf_set_ethtool_ops(struct net_device *netdev);
452 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
453 			       struct ixgbevf_ring *rx_ring);
454 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *);
455 void ixgbevf_free_rx_resources(struct ixgbevf_ring *);
456 void ixgbevf_free_tx_resources(struct ixgbevf_ring *);
457 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
458 int ethtool_ioctl(struct ifreq *ifr);
459 
460 extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
461 
462 #ifdef CONFIG_IXGBEVF_IPSEC
463 void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter);
464 void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter);
465 void ixgbevf_ipsec_restore(struct ixgbevf_adapter *adapter);
466 void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring,
467 		      union ixgbe_adv_rx_desc *rx_desc,
468 		      struct sk_buff *skb);
469 int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring,
470 		     struct ixgbevf_tx_buffer *first,
471 		     struct ixgbevf_ipsec_tx_data *itd);
472 #else
473 static inline void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter)
474 { }
475 static inline void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter)
476 { }
477 static inline void ixgbevf_ipsec_restore(struct ixgbevf_adapter *adapter) { }
478 static inline void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring,
479 				    union ixgbe_adv_rx_desc *rx_desc,
480 				    struct sk_buff *skb) { }
481 static inline int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring,
482 				   struct ixgbevf_tx_buffer *first,
483 				   struct ixgbevf_ipsec_tx_data *itd)
484 { return 0; }
485 #endif /* CONFIG_IXGBEVF_IPSEC */
486 
487 void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
488 void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
489 
490 #define ixgbevf_hw_to_netdev(hw) \
491 	(((struct ixgbevf_adapter *)(hw)->back)->netdev)
492 
493 #define hw_dbg(hw, format, arg...) \
494 	netdev_dbg(ixgbevf_hw_to_netdev(hw), format, ## arg)
495 #endif /* _IXGBEVF_H_ */
496