1 /*
2  * This file is part of the Chelsio T4 Ethernet driver for Linux.
3  *
4  * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 
35 #ifndef __CXGB4_ULD_H
36 #define __CXGB4_ULD_H
37 
38 #include <linux/cache.h>
39 #include <linux/spinlock.h>
40 #include <linux/skbuff.h>
41 #include <linux/inetdevice.h>
42 #include <linux/atomic.h>
43 #include "cxgb4.h"
44 
45 #define MAX_ULD_QSETS 16
46 
47 /* CPL message priority levels */
48 enum {
49 	CPL_PRIORITY_DATA     = 0,  /* data messages */
50 	CPL_PRIORITY_SETUP    = 1,  /* connection setup messages */
51 	CPL_PRIORITY_TEARDOWN = 0,  /* connection teardown messages */
52 	CPL_PRIORITY_LISTEN   = 1,  /* listen start/stop messages */
53 	CPL_PRIORITY_ACK      = 1,  /* RX ACK messages */
54 	CPL_PRIORITY_CONTROL  = 1   /* control messages */
55 };
56 
57 #define INIT_TP_WR(w, tid) do { \
58 	(w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) | \
59 			      FW_WR_IMMDLEN_V(sizeof(*w) - sizeof(w->wr))); \
60 	(w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*w), 16)) | \
61 			       FW_WR_FLOWID_V(tid)); \
62 	(w)->wr.wr_lo = cpu_to_be64(0); \
63 } while (0)
64 
65 #define INIT_TP_WR_CPL(w, cpl, tid) do { \
66 	INIT_TP_WR(w, tid); \
67 	OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
68 } while (0)
69 
70 #define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \
71 	(w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | \
72 			      FW_WR_ATOMIC_V(atomic)); \
73 	(w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(wrlen, 16)) | \
74 			       FW_WR_FLOWID_V(tid)); \
75 	(w)->wr.wr_lo = cpu_to_be64(0); \
76 } while (0)
77 
78 /* Special asynchronous notification message */
79 #define CXGB4_MSG_AN ((void *)1)
80 #define TX_ULD(uld)(((uld) != CXGB4_ULD_CRYPTO) ? CXGB4_TX_OFLD :\
81 		      CXGB4_TX_CRYPTO)
82 
83 struct serv_entry {
84 	void *data;
85 };
86 
87 union aopen_entry {
88 	void *data;
89 	union aopen_entry *next;
90 };
91 
92 struct eotid_entry {
93 	void *data;
94 };
95 
96 /*
97  * Holds the size, base address, free list start, etc of the TID, server TID,
98  * and active-open TID tables.  The tables themselves are allocated dynamically.
99  */
100 struct tid_info {
101 	void **tid_tab;
102 	unsigned int tid_base;
103 	unsigned int ntids;
104 
105 	struct serv_entry *stid_tab;
106 	unsigned long *stid_bmap;
107 	unsigned int nstids;
108 	unsigned int stid_base;
109 	unsigned int hash_base;
110 
111 	union aopen_entry *atid_tab;
112 	unsigned int natids;
113 	unsigned int atid_base;
114 
115 	struct filter_entry *hpftid_tab;
116 	unsigned long *hpftid_bmap;
117 	unsigned int nhpftids;
118 	unsigned int hpftid_base;
119 
120 	struct filter_entry *ftid_tab;
121 	unsigned long *ftid_bmap;
122 	unsigned int nftids;
123 	unsigned int ftid_base;
124 	unsigned int aftid_base;
125 	unsigned int aftid_end;
126 	/* Server filter region */
127 	unsigned int sftid_base;
128 	unsigned int nsftids;
129 
130 	spinlock_t atid_lock ____cacheline_aligned_in_smp;
131 	union aopen_entry *afree;
132 	unsigned int atids_in_use;
133 
134 	spinlock_t stid_lock;
135 	unsigned int stids_in_use;
136 	unsigned int v6_stids_in_use;
137 	unsigned int sftids_in_use;
138 
139 	/* ETHOFLD range */
140 	struct eotid_entry *eotid_tab;
141 	unsigned long *eotid_bmap;
142 	unsigned int eotid_base;
143 	unsigned int neotids;
144 
145 	/* TIDs in the TCAM */
146 	atomic_t tids_in_use;
147 	/* TIDs in the HASH */
148 	atomic_t hash_tids_in_use;
149 	atomic_t conns_in_use;
150 	/* lock for setting/clearing filter bitmap */
151 	spinlock_t ftid_lock;
152 
153 	unsigned int tc_hash_tids_max_prio;
154 };
155 
156 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
157 {
158 	tid -= t->tid_base;
159 	return tid < t->ntids ? t->tid_tab[tid] : NULL;
160 }
161 
162 static inline bool tid_out_of_range(const struct tid_info *t, unsigned int tid)
163 {
164 	return ((tid - t->tid_base) >= t->ntids);
165 }
166 
167 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
168 {
169 	return atid < t->natids ? t->atid_tab[atid].data : NULL;
170 }
171 
172 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
173 {
174 	/* Is it a server filter TID? */
175 	if (t->nsftids && (stid >= t->sftid_base)) {
176 		stid -= t->sftid_base;
177 		stid += t->nstids;
178 	} else {
179 		stid -= t->stid_base;
180 	}
181 
182 	return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL;
183 }
184 
185 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
186 				    unsigned int tid, unsigned short family)
187 {
188 	t->tid_tab[tid - t->tid_base] = data;
189 	if (t->hash_base && (tid >= t->hash_base)) {
190 		if (family == AF_INET6)
191 			atomic_add(2, &t->hash_tids_in_use);
192 		else
193 			atomic_inc(&t->hash_tids_in_use);
194 	} else {
195 		if (family == AF_INET6)
196 			atomic_add(2, &t->tids_in_use);
197 		else
198 			atomic_inc(&t->tids_in_use);
199 	}
200 	atomic_inc(&t->conns_in_use);
201 }
202 
203 static inline struct eotid_entry *cxgb4_lookup_eotid(struct tid_info *t,
204 						     u32 eotid)
205 {
206 	return eotid < t->neotids ? &t->eotid_tab[eotid] : NULL;
207 }
208 
209 static inline int cxgb4_get_free_eotid(struct tid_info *t)
210 {
211 	int eotid;
212 
213 	eotid = find_first_zero_bit(t->eotid_bmap, t->neotids);
214 	if (eotid >= t->neotids)
215 		eotid = -1;
216 
217 	return eotid;
218 }
219 
220 static inline void cxgb4_alloc_eotid(struct tid_info *t, u32 eotid, void *data)
221 {
222 	set_bit(eotid, t->eotid_bmap);
223 	t->eotid_tab[eotid].data = data;
224 }
225 
226 static inline void cxgb4_free_eotid(struct tid_info *t, u32 eotid)
227 {
228 	clear_bit(eotid, t->eotid_bmap);
229 	t->eotid_tab[eotid].data = NULL;
230 }
231 
232 int cxgb4_alloc_atid(struct tid_info *t, void *data);
233 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
234 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data);
235 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
236 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
237 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid,
238 		      unsigned short family);
239 struct in6_addr;
240 
241 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
242 			__be32 sip, __be16 sport, __be16 vlan,
243 			unsigned int queue);
244 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
245 			 const struct in6_addr *sip, __be16 sport,
246 			 unsigned int queue);
247 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid,
248 			unsigned int queue, bool ipv6);
249 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
250 			       __be32 sip, __be16 sport, __be16 vlan,
251 			       unsigned int queue,
252 			       unsigned char port, unsigned char mask);
253 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
254 			       unsigned int queue, bool ipv6);
255 
256 /* Filter operation context to allow callers of cxgb4_set_filter() and
257  * cxgb4_del_filter() to wait for an asynchronous completion.
258  */
259 struct filter_ctx {
260 	struct completion completion;	/* completion rendezvous */
261 	void *closure;			/* caller's opaque information */
262 	int result;			/* result of operation */
263 	u32 tid;			/* to store tid */
264 };
265 
266 struct ch_filter_specification;
267 
268 int cxgb4_get_free_ftid(struct net_device *dev, u8 family, bool hash_en,
269 			u32 tc_prio);
270 int __cxgb4_set_filter(struct net_device *dev, int filter_id,
271 		       struct ch_filter_specification *fs,
272 		       struct filter_ctx *ctx);
273 int __cxgb4_del_filter(struct net_device *dev, int filter_id,
274 		       struct ch_filter_specification *fs,
275 		       struct filter_ctx *ctx);
276 int cxgb4_set_filter(struct net_device *dev, int filter_id,
277 		     struct ch_filter_specification *fs);
278 int cxgb4_del_filter(struct net_device *dev, int filter_id,
279 		     struct ch_filter_specification *fs);
280 int cxgb4_get_filter_counters(struct net_device *dev, unsigned int fidx,
281 			      u64 *hitcnt, u64 *bytecnt, bool hash);
282 
283 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
284 {
285 	skb_set_queue_mapping(skb, (queue << 1) | prio);
286 }
287 
288 enum cxgb4_uld {
289 	CXGB4_ULD_INIT,
290 	CXGB4_ULD_RDMA,
291 	CXGB4_ULD_ISCSI,
292 	CXGB4_ULD_ISCSIT,
293 	CXGB4_ULD_CRYPTO,
294 	CXGB4_ULD_TLS,
295 	CXGB4_ULD_MAX
296 };
297 
298 enum cxgb4_tx_uld {
299 	CXGB4_TX_OFLD,
300 	CXGB4_TX_CRYPTO,
301 	CXGB4_TX_MAX
302 };
303 
304 enum cxgb4_txq_type {
305 	CXGB4_TXQ_ETH,
306 	CXGB4_TXQ_ULD,
307 	CXGB4_TXQ_CTRL,
308 	CXGB4_TXQ_MAX
309 };
310 
311 enum cxgb4_state {
312 	CXGB4_STATE_UP,
313 	CXGB4_STATE_START_RECOVERY,
314 	CXGB4_STATE_DOWN,
315 	CXGB4_STATE_DETACH,
316 	CXGB4_STATE_FATAL_ERROR
317 };
318 
319 enum cxgb4_control {
320 	CXGB4_CONTROL_DB_FULL,
321 	CXGB4_CONTROL_DB_EMPTY,
322 	CXGB4_CONTROL_DB_DROP,
323 };
324 
325 struct pci_dev;
326 struct l2t_data;
327 struct net_device;
328 struct pkt_gl;
329 struct tp_tcp_stats;
330 struct t4_lro_mgr;
331 
332 struct cxgb4_range {
333 	unsigned int start;
334 	unsigned int size;
335 };
336 
337 struct cxgb4_virt_res {                      /* virtualized HW resources */
338 	struct cxgb4_range ddp;
339 	struct cxgb4_range iscsi;
340 	struct cxgb4_range stag;
341 	struct cxgb4_range rq;
342 	struct cxgb4_range srq;
343 	struct cxgb4_range pbl;
344 	struct cxgb4_range qp;
345 	struct cxgb4_range cq;
346 	struct cxgb4_range ocq;
347 	struct cxgb4_range key;
348 	unsigned int ncrypto_fc;
349 	struct cxgb4_range ppod_edram;
350 };
351 
352 struct chcr_stats_debug {
353 	atomic_t cipher_rqst;
354 	atomic_t digest_rqst;
355 	atomic_t aead_rqst;
356 	atomic_t complete;
357 	atomic_t error;
358 	atomic_t fallback;
359 	atomic_t ipsec_cnt;
360 	atomic_t tls_pdu_tx;
361 	atomic_t tls_pdu_rx;
362 	atomic_t tls_key;
363 #ifdef CONFIG_CHELSIO_TLS_DEVICE
364 	atomic64_t ktls_tx_connection_open;
365 	atomic64_t ktls_tx_connection_fail;
366 	atomic64_t ktls_tx_connection_close;
367 	atomic64_t ktls_tx_send_records;
368 	atomic64_t ktls_tx_end_pkts;
369 	atomic64_t ktls_tx_start_pkts;
370 	atomic64_t ktls_tx_middle_pkts;
371 	atomic64_t ktls_tx_retransmit_pkts;
372 	atomic64_t ktls_tx_complete_pkts;
373 	atomic64_t ktls_tx_trimmed_pkts;
374 	atomic64_t ktls_tx_encrypted_packets;
375 	atomic64_t ktls_tx_encrypted_bytes;
376 	atomic64_t ktls_tx_ctx;
377 	atomic64_t ktls_tx_ooo;
378 	atomic64_t ktls_tx_skip_no_sync_data;
379 	atomic64_t ktls_tx_drop_no_sync_data;
380 	atomic64_t ktls_tx_drop_bypass_req;
381 
382 #endif
383 };
384 
385 #define OCQ_WIN_OFFSET(pdev, vres) \
386 	(pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
387 
388 /*
389  * Block of information the LLD provides to ULDs attaching to a device.
390  */
391 struct cxgb4_lld_info {
392 	struct pci_dev *pdev;                /* associated PCI device */
393 	struct l2t_data *l2t;                /* L2 table */
394 	struct tid_info *tids;               /* TID table */
395 	struct net_device **ports;           /* device ports */
396 	const struct cxgb4_virt_res *vr;     /* assorted HW resources */
397 	const unsigned short *mtus;          /* MTU table */
398 	const unsigned short *rxq_ids;       /* the ULD's Rx queue ids */
399 	const unsigned short *ciq_ids;       /* the ULD's concentrator IQ ids */
400 	unsigned short nrxq;                 /* # of Rx queues */
401 	unsigned short ntxq;                 /* # of Tx queues */
402 	unsigned short nciq;		     /* # of concentrator IQ */
403 	unsigned char nchan:4;               /* # of channels */
404 	unsigned char nports:4;              /* # of ports */
405 	unsigned char wr_cred;               /* WR 16-byte credits */
406 	unsigned char adapter_type;          /* type of adapter */
407 	unsigned char fw_api_ver;            /* FW API version */
408 	unsigned char crypto;                /* crypto support */
409 	unsigned int fw_vers;                /* FW version */
410 	unsigned int iscsi_iolen;            /* iSCSI max I/O length */
411 	unsigned int cclk_ps;                /* Core clock period in psec */
412 	unsigned short udb_density;          /* # of user DB/page */
413 	unsigned short ucq_density;          /* # of user CQs/page */
414 	unsigned int sge_host_page_size;     /* SGE host page size */
415 	unsigned short filt_mode;            /* filter optional components */
416 	unsigned short tx_modq[NCHAN];       /* maps each tx channel to a */
417 					     /* scheduler queue */
418 	void __iomem *gts_reg;               /* address of GTS register */
419 	void __iomem *db_reg;                /* address of kernel doorbell */
420 	int dbfifo_int_thresh;		     /* doorbell fifo int threshold */
421 	unsigned int sge_ingpadboundary;     /* SGE ingress padding boundary */
422 	unsigned int sge_egrstatuspagesize;  /* SGE egress status page size */
423 	unsigned int sge_pktshift;           /* Padding between CPL and */
424 					     /*	packet data */
425 	unsigned int pf;		     /* Physical Function we're using */
426 	bool enable_fw_ofld_conn;            /* Enable connection through fw */
427 					     /* WR */
428 	unsigned int max_ordird_qp;          /* Max ORD/IRD depth per RDMA QP */
429 	unsigned int max_ird_adapter;        /* Max IRD memory per adapter */
430 	bool ulptx_memwrite_dsgl;            /* use of T5 DSGL allowed */
431 	unsigned int iscsi_tagmask;	     /* iscsi ddp tag mask */
432 	unsigned int iscsi_pgsz_order;	     /* iscsi ddp page size orders */
433 	unsigned int iscsi_llimit;	     /* chip's iscsi region llimit */
434 	unsigned int ulp_crypto;             /* crypto lookaside support */
435 	void **iscsi_ppm;		     /* iscsi page pod manager */
436 	int nodeid;			     /* device numa node id */
437 	bool fr_nsmr_tpte_wr_support;	     /* FW supports FR_NSMR_TPTE_WR */
438 	bool write_w_imm_support;         /* FW supports WRITE_WITH_IMMEDIATE */
439 	bool write_cmpl_support;             /* FW supports WRITE_CMPL WR */
440 };
441 
442 struct cxgb4_uld_info {
443 	char name[IFNAMSIZ];
444 	void *handle;
445 	unsigned int nrxq;
446 	unsigned int rxq_size;
447 	unsigned int ntxq;
448 	bool ciq;
449 	bool lro;
450 	void *(*add)(const struct cxgb4_lld_info *p);
451 	int (*rx_handler)(void *handle, const __be64 *rsp,
452 			  const struct pkt_gl *gl);
453 	int (*state_change)(void *handle, enum cxgb4_state new_state);
454 	int (*control)(void *handle, enum cxgb4_control control, ...);
455 	int (*lro_rx_handler)(void *handle, const __be64 *rsp,
456 			      const struct pkt_gl *gl,
457 			      struct t4_lro_mgr *lro_mgr,
458 			      struct napi_struct *napi);
459 	void (*lro_flush)(struct t4_lro_mgr *);
460 	int (*tx_handler)(struct sk_buff *skb, struct net_device *dev);
461 };
462 
463 void cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
464 int cxgb4_unregister_uld(enum cxgb4_uld type);
465 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
466 int cxgb4_immdata_send(struct net_device *dev, unsigned int idx,
467 		       const void *src, unsigned int len);
468 int cxgb4_crypto_send(struct net_device *dev, struct sk_buff *skb);
469 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
470 unsigned int cxgb4_port_chan(const struct net_device *dev);
471 unsigned int cxgb4_port_e2cchan(const struct net_device *dev);
472 unsigned int cxgb4_port_viid(const struct net_device *dev);
473 unsigned int cxgb4_tp_smt_idx(enum chip_type chip, unsigned int viid);
474 unsigned int cxgb4_port_idx(const struct net_device *dev);
475 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
476 			    unsigned int *idx);
477 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus,
478 				    unsigned short header_size,
479 				    unsigned short data_size_max,
480 				    unsigned short data_size_align,
481 				    unsigned int *mtu_idxp);
482 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
483 			 struct tp_tcp_stats *v6);
484 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
485 		      const unsigned int *pgsz_order);
486 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
487 				   unsigned int skb_len, unsigned int pull_len);
488 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
489 int cxgb4_flush_eq_cache(struct net_device *dev);
490 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte);
491 u64 cxgb4_read_sge_timestamp(struct net_device *dev);
492 
493 enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS };
494 int cxgb4_bar2_sge_qregs(struct net_device *dev,
495 			 unsigned int qid,
496 			 enum cxgb4_bar2_qtype qtype,
497 			 int user,
498 			 u64 *pbar2_qoffset,
499 			 unsigned int *pbar2_qid);
500 
501 #endif  /* !__CXGB4_ULD_H */
502