1 /* QLogic qede NIC Driver
2  * Copyright (c) 2015-2017  QLogic Corporation
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and /or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32 #ifndef _QEDE_H_
33 #define _QEDE_H_
34 #include <linux/compiler.h>
35 #include <linux/version.h>
36 #include <linux/workqueue.h>
37 #include <linux/netdevice.h>
38 #include <linux/interrupt.h>
39 #include <linux/bitmap.h>
40 #include <linux/kernel.h>
41 #include <linux/mutex.h>
42 #include <linux/bpf.h>
43 #include <linux/qed/qede_rdma.h>
44 #include <linux/io.h>
45 #ifdef CONFIG_RFS_ACCEL
46 #include <linux/cpu_rmap.h>
47 #endif
48 #include <linux/qed/common_hsi.h>
49 #include <linux/qed/eth_common.h>
50 #include <linux/qed/qed_if.h>
51 #include <linux/qed/qed_chain.h>
52 #include <linux/qed/qed_eth_if.h>
53 
54 #define QEDE_MAJOR_VERSION		8
55 #define QEDE_MINOR_VERSION		10
56 #define QEDE_REVISION_VERSION		10
57 #define QEDE_ENGINEERING_VERSION	21
58 #define DRV_MODULE_VERSION __stringify(QEDE_MAJOR_VERSION) "."	\
59 		__stringify(QEDE_MINOR_VERSION) "."		\
60 		__stringify(QEDE_REVISION_VERSION) "."		\
61 		__stringify(QEDE_ENGINEERING_VERSION)
62 
63 #define DRV_MODULE_SYM		qede
64 
65 struct qede_stats_common {
66 	u64 no_buff_discards;
67 	u64 packet_too_big_discard;
68 	u64 ttl0_discard;
69 	u64 rx_ucast_bytes;
70 	u64 rx_mcast_bytes;
71 	u64 rx_bcast_bytes;
72 	u64 rx_ucast_pkts;
73 	u64 rx_mcast_pkts;
74 	u64 rx_bcast_pkts;
75 	u64 mftag_filter_discards;
76 	u64 mac_filter_discards;
77 	u64 tx_ucast_bytes;
78 	u64 tx_mcast_bytes;
79 	u64 tx_bcast_bytes;
80 	u64 tx_ucast_pkts;
81 	u64 tx_mcast_pkts;
82 	u64 tx_bcast_pkts;
83 	u64 tx_err_drop_pkts;
84 	u64 coalesced_pkts;
85 	u64 coalesced_events;
86 	u64 coalesced_aborts_num;
87 	u64 non_coalesced_pkts;
88 	u64 coalesced_bytes;
89 
90 	/* port */
91 	u64 rx_64_byte_packets;
92 	u64 rx_65_to_127_byte_packets;
93 	u64 rx_128_to_255_byte_packets;
94 	u64 rx_256_to_511_byte_packets;
95 	u64 rx_512_to_1023_byte_packets;
96 	u64 rx_1024_to_1518_byte_packets;
97 	u64 rx_crc_errors;
98 	u64 rx_mac_crtl_frames;
99 	u64 rx_pause_frames;
100 	u64 rx_pfc_frames;
101 	u64 rx_align_errors;
102 	u64 rx_carrier_errors;
103 	u64 rx_oversize_packets;
104 	u64 rx_jabbers;
105 	u64 rx_undersize_packets;
106 	u64 rx_fragments;
107 	u64 tx_64_byte_packets;
108 	u64 tx_65_to_127_byte_packets;
109 	u64 tx_128_to_255_byte_packets;
110 	u64 tx_256_to_511_byte_packets;
111 	u64 tx_512_to_1023_byte_packets;
112 	u64 tx_1024_to_1518_byte_packets;
113 	u64 tx_pause_frames;
114 	u64 tx_pfc_frames;
115 	u64 brb_truncates;
116 	u64 brb_discards;
117 	u64 tx_mac_ctrl_frames;
118 };
119 
120 struct qede_stats_bb {
121 	u64 rx_1519_to_1522_byte_packets;
122 	u64 rx_1519_to_2047_byte_packets;
123 	u64 rx_2048_to_4095_byte_packets;
124 	u64 rx_4096_to_9216_byte_packets;
125 	u64 rx_9217_to_16383_byte_packets;
126 	u64 tx_1519_to_2047_byte_packets;
127 	u64 tx_2048_to_4095_byte_packets;
128 	u64 tx_4096_to_9216_byte_packets;
129 	u64 tx_9217_to_16383_byte_packets;
130 	u64 tx_lpi_entry_count;
131 	u64 tx_total_collisions;
132 };
133 
134 struct qede_stats_ah {
135 	u64 rx_1519_to_max_byte_packets;
136 	u64 tx_1519_to_max_byte_packets;
137 };
138 
139 struct qede_stats {
140 	struct qede_stats_common common;
141 
142 	union {
143 		struct qede_stats_bb bb;
144 		struct qede_stats_ah ah;
145 	};
146 };
147 
148 struct qede_vlan {
149 	struct list_head list;
150 	u16 vid;
151 	bool configured;
152 };
153 
154 struct qede_rdma_dev {
155 	struct qedr_dev *qedr_dev;
156 	struct list_head entry;
157 	struct list_head rdma_event_list;
158 	struct workqueue_struct *rdma_wq;
159 };
160 
161 struct qede_ptp;
162 
163 struct qede_dev {
164 	struct qed_dev			*cdev;
165 	struct net_device		*ndev;
166 	struct pci_dev			*pdev;
167 
168 	u32				dp_module;
169 	u8				dp_level;
170 
171 	unsigned long flags;
172 #define QEDE_FLAG_IS_VF			BIT(0)
173 #define IS_VF(edev)	(!!((edev)->flags & QEDE_FLAG_IS_VF))
174 #define QEDE_TX_TIMESTAMPING_EN		BIT(1)
175 #define QEDE_FLAGS_PTP_TX_IN_PRORGESS	BIT(2)
176 
177 	const struct qed_eth_ops	*ops;
178 	struct qede_ptp			*ptp;
179 
180 	struct qed_dev_eth_info dev_info;
181 #define QEDE_MAX_RSS_CNT(edev)	((edev)->dev_info.num_queues)
182 #define QEDE_MAX_TSS_CNT(edev)	((edev)->dev_info.num_queues)
183 #define QEDE_IS_BB(edev) \
184 	((edev)->dev_info.common.dev_type == QED_DEV_TYPE_BB)
185 #define QEDE_IS_AH(edev) \
186 	((edev)->dev_info.common.dev_type == QED_DEV_TYPE_AH)
187 
188 	struct qede_fastpath		*fp_array;
189 	u8				req_num_tx;
190 	u8				fp_num_tx;
191 	u8				req_num_rx;
192 	u8				fp_num_rx;
193 	u16				req_queues;
194 	u16				num_queues;
195 #define QEDE_QUEUE_CNT(edev)	((edev)->num_queues)
196 #define QEDE_RSS_COUNT(edev)	((edev)->num_queues - (edev)->fp_num_tx)
197 #define QEDE_RX_QUEUE_IDX(edev, i)	(i)
198 #define QEDE_TSS_COUNT(edev)	((edev)->num_queues - (edev)->fp_num_rx)
199 
200 	struct qed_int_info		int_info;
201 
202 	/* Smaller private varaiant of the RTNL lock */
203 	struct mutex			qede_lock;
204 	u32				state; /* Protected by qede_lock */
205 	u16				rx_buf_size;
206 	u32				rx_copybreak;
207 
208 	/* L2 header size + 2*VLANs (8 bytes) + LLC SNAP (8 bytes) */
209 #define ETH_OVERHEAD			(ETH_HLEN + 8 + 8)
210 	/* Max supported alignment is 256 (8 shift)
211 	 * minimal alignment shift 6 is optimal for 57xxx HW performance
212 	 */
213 #define QEDE_RX_ALIGN_SHIFT		max(6, min(8, L1_CACHE_SHIFT))
214 	/* We assume skb_build() uses sizeof(struct skb_shared_info) bytes
215 	 * at the end of skb->data, to avoid wasting a full cache line.
216 	 * This reduces memory use (skb->truesize).
217 	 */
218 #define QEDE_FW_RX_ALIGN_END					\
219 	max_t(u64, 1UL << QEDE_RX_ALIGN_SHIFT,			\
220 	      SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
221 
222 	struct qede_stats		stats;
223 #define QEDE_RSS_INDIR_INITED	BIT(0)
224 #define QEDE_RSS_KEY_INITED	BIT(1)
225 #define QEDE_RSS_CAPS_INITED	BIT(2)
226 	u32 rss_params_inited; /* bit-field to track initialized rss params */
227 	u16 rss_ind_table[128];
228 	u32 rss_key[10];
229 	u8 rss_caps;
230 
231 	u16			q_num_rx_buffers; /* Must be a power of two */
232 	u16			q_num_tx_buffers; /* Must be a power of two */
233 
234 	bool gro_disable;
235 	struct list_head vlan_list;
236 	u16 configured_vlans;
237 	u16 non_configured_vlans;
238 	bool accept_any_vlan;
239 	struct delayed_work		sp_task;
240 	unsigned long			sp_flags;
241 	u16				vxlan_dst_port;
242 	u16				geneve_dst_port;
243 
244 #ifdef CONFIG_RFS_ACCEL
245 	struct qede_arfs		*arfs;
246 #endif
247 	bool				wol_enabled;
248 
249 	struct qede_rdma_dev		rdma_info;
250 
251 	struct bpf_prog *xdp_prog;
252 };
253 
254 enum QEDE_STATE {
255 	QEDE_STATE_CLOSED,
256 	QEDE_STATE_OPEN,
257 };
258 
259 #define HILO_U64(hi, lo)		((((u64)(hi)) << 32) + (lo))
260 
261 #define	MAX_NUM_TC	8
262 #define	MAX_NUM_PRI	8
263 
264 /* The driver supports the new build_skb() API:
265  * RX ring buffer contains pointer to kmalloc() data only,
266  * skb are built only after the frame was DMA-ed.
267  */
268 struct sw_rx_data {
269 	struct page *data;
270 	dma_addr_t mapping;
271 	unsigned int page_offset;
272 };
273 
274 enum qede_agg_state {
275 	QEDE_AGG_STATE_NONE  = 0,
276 	QEDE_AGG_STATE_START = 1,
277 	QEDE_AGG_STATE_ERROR = 2
278 };
279 
280 struct qede_agg_info {
281 	/* rx_buf is a data buffer that can be placed / consumed from rx bd
282 	 * chain. It has two purposes: We will preallocate the data buffer
283 	 * for each aggregation when we open the interface and will place this
284 	 * buffer on the rx-bd-ring when we receive TPA_START. We don't want
285 	 * to be in a state where allocation fails, as we can't reuse the
286 	 * consumer buffer in the rx-chain since FW may still be writing to it
287 	 * (since header needs to be modified for TPA).
288 	 * The second purpose is to keep a pointer to the bd buffer during
289 	 * aggregation.
290 	 */
291 	struct sw_rx_data buffer;
292 	dma_addr_t buffer_mapping;
293 
294 	struct sk_buff *skb;
295 
296 	/* We need some structs from the start cookie until termination */
297 	u16 vlan_tag;
298 	u16 start_cqe_bd_len;
299 	u8 start_cqe_placement_offset;
300 
301 	u8 state;
302 	u8 frag_id;
303 
304 	u8 tunnel_type;
305 };
306 
307 struct qede_rx_queue {
308 	__le16 *hw_cons_ptr;
309 	void __iomem *hw_rxq_prod_addr;
310 
311 	/* Required for the allocation of replacement buffers */
312 	struct device *dev;
313 
314 	struct bpf_prog *xdp_prog;
315 
316 	u16 sw_rx_cons;
317 	u16 sw_rx_prod;
318 
319 	u16 filled_buffers;
320 	u8 data_direction;
321 	u8 rxq_id;
322 
323 	/* Used once per each NAPI run */
324 	u16 num_rx_buffers;
325 
326 	u16 rx_headroom;
327 
328 	u32 rx_buf_size;
329 	u32 rx_buf_seg_size;
330 
331 	struct sw_rx_data *sw_rx_ring;
332 	struct qed_chain rx_bd_ring;
333 	struct qed_chain rx_comp_ring ____cacheline_aligned;
334 
335 	/* GRO */
336 	struct qede_agg_info tpa_info[ETH_TPA_MAX_AGGS_NUM];
337 
338 	/* Used once per each NAPI run */
339 	u64 rcv_pkts;
340 
341 	u64 rx_hw_errors;
342 	u64 rx_alloc_errors;
343 	u64 rx_ip_frags;
344 
345 	u64 xdp_no_pass;
346 
347 	void *handle;
348 };
349 
350 union db_prod {
351 	struct eth_db_data data;
352 	u32		raw;
353 };
354 
355 struct sw_tx_bd {
356 	struct sk_buff *skb;
357 	u8 flags;
358 /* Set on the first BD descriptor when there is a split BD */
359 #define QEDE_TSO_SPLIT_BD		BIT(0)
360 };
361 
362 struct sw_tx_xdp {
363 	struct page *page;
364 	dma_addr_t mapping;
365 };
366 
367 struct qede_tx_queue {
368 	u8 is_xdp;
369 	bool is_legacy;
370 	u16 sw_tx_cons;
371 	u16 sw_tx_prod;
372 	u16 num_tx_buffers; /* Slowpath only */
373 
374 	u64 xmit_pkts;
375 	u64 stopped_cnt;
376 
377 	__le16 *hw_cons_ptr;
378 
379 	/* Needed for the mapping of packets */
380 	struct device *dev;
381 
382 	void __iomem *doorbell_addr;
383 	union db_prod tx_db;
384 	int index; /* Slowpath only */
385 #define QEDE_TXQ_XDP_TO_IDX(edev, txq)	((txq)->index - \
386 					 QEDE_MAX_TSS_CNT(edev))
387 #define QEDE_TXQ_IDX_TO_XDP(edev, idx)	((idx) + QEDE_MAX_TSS_CNT(edev))
388 
389 	/* Regular Tx requires skb + metadata for release purpose,
390 	 * while XDP requires the pages and the mapped address.
391 	 */
392 	union {
393 		struct sw_tx_bd *skbs;
394 		struct sw_tx_xdp *xdp;
395 	} sw_tx_ring;
396 
397 	struct qed_chain tx_pbl;
398 
399 	/* Slowpath; Should be kept in end [unless missing padding] */
400 	void *handle;
401 };
402 
403 #define BD_UNMAP_ADDR(bd)		HILO_U64(le32_to_cpu((bd)->addr.hi), \
404 						 le32_to_cpu((bd)->addr.lo))
405 #define BD_SET_UNMAP_ADDR_LEN(bd, maddr, len)				\
406 	do {								\
407 		(bd)->addr.hi = cpu_to_le32(upper_32_bits(maddr));	\
408 		(bd)->addr.lo = cpu_to_le32(lower_32_bits(maddr));	\
409 		(bd)->nbytes = cpu_to_le16(len);			\
410 	} while (0)
411 #define BD_UNMAP_LEN(bd)		(le16_to_cpu((bd)->nbytes))
412 
413 struct qede_fastpath {
414 	struct qede_dev	*edev;
415 #define QEDE_FASTPATH_TX	BIT(0)
416 #define QEDE_FASTPATH_RX	BIT(1)
417 #define QEDE_FASTPATH_XDP	BIT(2)
418 #define QEDE_FASTPATH_COMBINED	(QEDE_FASTPATH_TX | QEDE_FASTPATH_RX)
419 	u8			type;
420 	u8			id;
421 	u8			xdp_xmit;
422 	struct napi_struct	napi;
423 	struct qed_sb_info	*sb_info;
424 	struct qede_rx_queue	*rxq;
425 	struct qede_tx_queue	*txq;
426 	struct qede_tx_queue	*xdp_tx;
427 
428 #define VEC_NAME_SIZE	(sizeof(((struct net_device *)0)->name) + 8)
429 	char	name[VEC_NAME_SIZE];
430 };
431 
432 /* Debug print definitions */
433 #define DP_NAME(edev) ((edev)->ndev->name)
434 
435 #define XMIT_PLAIN		0
436 #define XMIT_L4_CSUM		BIT(0)
437 #define XMIT_LSO		BIT(1)
438 #define XMIT_ENC		BIT(2)
439 #define XMIT_ENC_GSO_L4_CSUM	BIT(3)
440 
441 #define QEDE_CSUM_ERROR			BIT(0)
442 #define QEDE_CSUM_UNNECESSARY		BIT(1)
443 #define QEDE_TUNN_CSUM_UNNECESSARY	BIT(2)
444 
445 #define QEDE_SP_RX_MODE			1
446 
447 #ifdef CONFIG_RFS_ACCEL
448 int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
449 		       u16 rxq_index, u32 flow_id);
450 void qede_process_arfs_filters(struct qede_dev *edev, bool free_fltr);
451 void qede_poll_for_freeing_arfs_filters(struct qede_dev *edev);
452 void qede_arfs_filter_op(void *dev, void *filter, u8 fw_rc);
453 void qede_free_arfs(struct qede_dev *edev);
454 int qede_alloc_arfs(struct qede_dev *edev);
455 
456 #define QEDE_SP_ARFS_CONFIG	4
457 #define QEDE_SP_TASK_POLL_DELAY	(5 * HZ)
458 #define QEDE_RFS_MAX_FLTR	256
459 #endif
460 
461 struct qede_reload_args {
462 	void (*func)(struct qede_dev *edev, struct qede_reload_args *args);
463 	union {
464 		netdev_features_t features;
465 		struct bpf_prog *new_prog;
466 		u16 mtu;
467 	} u;
468 };
469 
470 /* Datapath functions definition */
471 netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev);
472 netdev_features_t qede_features_check(struct sk_buff *skb,
473 				      struct net_device *dev,
474 				      netdev_features_t features);
475 void qede_tx_log_print(struct qede_dev *edev, struct qede_fastpath *fp);
476 int qede_alloc_rx_buffer(struct qede_rx_queue *rxq, bool allow_lazy);
477 int qede_free_tx_pkt(struct qede_dev *edev,
478 		     struct qede_tx_queue *txq, int *len);
479 int qede_poll(struct napi_struct *napi, int budget);
480 irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie);
481 
482 /* Filtering function definitions */
483 void qede_force_mac(void *dev, u8 *mac, bool forced);
484 void qede_udp_ports_update(void *dev, u16 vxlan_port, u16 geneve_port);
485 int qede_set_mac_addr(struct net_device *ndev, void *p);
486 
487 int qede_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid);
488 int qede_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid);
489 void qede_vlan_mark_nonconfigured(struct qede_dev *edev);
490 int qede_configure_vlan_filters(struct qede_dev *edev);
491 
492 int qede_set_features(struct net_device *dev, netdev_features_t features);
493 void qede_set_rx_mode(struct net_device *ndev);
494 void qede_config_rx_mode(struct net_device *ndev);
495 void qede_fill_rss_params(struct qede_dev *edev,
496 			  struct qed_update_vport_rss_params *rss, u8 *update);
497 
498 void qede_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti);
499 void qede_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti);
500 
501 int qede_xdp(struct net_device *dev, struct netdev_xdp *xdp);
502 
503 #ifdef CONFIG_DCB
504 void qede_set_dcbnl_ops(struct net_device *ndev);
505 #endif
506 
507 void qede_config_debug(uint debug, u32 *p_dp_module, u8 *p_dp_level);
508 void qede_set_ethtool_ops(struct net_device *netdev);
509 void qede_reload(struct qede_dev *edev,
510 		 struct qede_reload_args *args, bool is_locked);
511 int qede_change_mtu(struct net_device *dev, int new_mtu);
512 void qede_fill_by_demand_stats(struct qede_dev *edev);
513 void __qede_lock(struct qede_dev *edev);
514 void __qede_unlock(struct qede_dev *edev);
515 bool qede_has_rx_work(struct qede_rx_queue *rxq);
516 int qede_txq_has_work(struct qede_tx_queue *txq);
517 void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq, u8 count);
518 void qede_update_rx_prod(struct qede_dev *edev, struct qede_rx_queue *rxq);
519 
520 #define RX_RING_SIZE_POW	13
521 #define RX_RING_SIZE		((u16)BIT(RX_RING_SIZE_POW))
522 #define NUM_RX_BDS_MAX		(RX_RING_SIZE - 1)
523 #define NUM_RX_BDS_MIN		128
524 #define NUM_RX_BDS_DEF		((u16)BIT(10) - 1)
525 
526 #define TX_RING_SIZE_POW	13
527 #define TX_RING_SIZE		((u16)BIT(TX_RING_SIZE_POW))
528 #define NUM_TX_BDS_MAX		(TX_RING_SIZE - 1)
529 #define NUM_TX_BDS_MIN		128
530 #define NUM_TX_BDS_DEF		NUM_TX_BDS_MAX
531 
532 #define QEDE_MIN_PKT_LEN		64
533 #define QEDE_RX_HDR_SIZE		256
534 #define QEDE_MAX_JUMBO_PACKET_SIZE	9600
535 #define	for_each_queue(i) for (i = 0; i < edev->num_queues; i++)
536 
537 #endif /* _QEDE_H_ */
538