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 /*
93  * Holds the size, base address, free list start, etc of the TID, server TID,
94  * and active-open TID tables.  The tables themselves are allocated dynamically.
95  */
96 struct tid_info {
97 	void **tid_tab;
98 	unsigned int ntids;
99 
100 	struct serv_entry *stid_tab;
101 	unsigned long *stid_bmap;
102 	unsigned int nstids;
103 	unsigned int stid_base;
104 	unsigned int hash_base;
105 
106 	union aopen_entry *atid_tab;
107 	unsigned int natids;
108 	unsigned int atid_base;
109 
110 	struct filter_entry *ftid_tab;
111 	unsigned long *ftid_bmap;
112 	unsigned int nftids;
113 	unsigned int ftid_base;
114 	unsigned int aftid_base;
115 	unsigned int aftid_end;
116 	/* Server filter region */
117 	unsigned int sftid_base;
118 	unsigned int nsftids;
119 
120 	spinlock_t atid_lock ____cacheline_aligned_in_smp;
121 	union aopen_entry *afree;
122 	unsigned int atids_in_use;
123 
124 	spinlock_t stid_lock;
125 	unsigned int stids_in_use;
126 	unsigned int v6_stids_in_use;
127 	unsigned int sftids_in_use;
128 
129 	/* TIDs in the TCAM */
130 	atomic_t tids_in_use;
131 	/* TIDs in the HASH */
132 	atomic_t hash_tids_in_use;
133 	atomic_t conns_in_use;
134 	/* lock for setting/clearing filter bitmap */
135 	spinlock_t ftid_lock;
136 };
137 
lookup_tid(const struct tid_info * t,unsigned int tid)138 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
139 {
140 	return tid < t->ntids ? t->tid_tab[tid] : NULL;
141 }
142 
lookup_atid(const struct tid_info * t,unsigned int atid)143 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
144 {
145 	return atid < t->natids ? t->atid_tab[atid].data : NULL;
146 }
147 
lookup_stid(const struct tid_info * t,unsigned int stid)148 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
149 {
150 	/* Is it a server filter TID? */
151 	if (t->nsftids && (stid >= t->sftid_base)) {
152 		stid -= t->sftid_base;
153 		stid += t->nstids;
154 	} else {
155 		stid -= t->stid_base;
156 	}
157 
158 	return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL;
159 }
160 
cxgb4_insert_tid(struct tid_info * t,void * data,unsigned int tid,unsigned short family)161 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
162 				    unsigned int tid, unsigned short family)
163 {
164 	t->tid_tab[tid] = data;
165 	if (t->hash_base && (tid >= t->hash_base)) {
166 		if (family == AF_INET6)
167 			atomic_add(2, &t->hash_tids_in_use);
168 		else
169 			atomic_inc(&t->hash_tids_in_use);
170 	} else {
171 		if (family == AF_INET6)
172 			atomic_add(2, &t->tids_in_use);
173 		else
174 			atomic_inc(&t->tids_in_use);
175 	}
176 	atomic_inc(&t->conns_in_use);
177 }
178 
179 int cxgb4_alloc_atid(struct tid_info *t, void *data);
180 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
181 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data);
182 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
183 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
184 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid,
185 		      unsigned short family);
186 struct in6_addr;
187 
188 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
189 			__be32 sip, __be16 sport, __be16 vlan,
190 			unsigned int queue);
191 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
192 			 const struct in6_addr *sip, __be16 sport,
193 			 unsigned int queue);
194 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid,
195 			unsigned int queue, bool ipv6);
196 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
197 			       __be32 sip, __be16 sport, __be16 vlan,
198 			       unsigned int queue,
199 			       unsigned char port, unsigned char mask);
200 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
201 			       unsigned int queue, bool ipv6);
202 
203 /* Filter operation context to allow callers of cxgb4_set_filter() and
204  * cxgb4_del_filter() to wait for an asynchronous completion.
205  */
206 struct filter_ctx {
207 	struct completion completion;	/* completion rendezvous */
208 	void *closure;			/* caller's opaque information */
209 	int result;			/* result of operation */
210 	u32 tid;			/* to store tid */
211 };
212 
213 struct ch_filter_specification;
214 
215 int cxgb4_get_free_ftid(struct net_device *dev, int family);
216 int __cxgb4_set_filter(struct net_device *dev, int filter_id,
217 		       struct ch_filter_specification *fs,
218 		       struct filter_ctx *ctx);
219 int __cxgb4_del_filter(struct net_device *dev, int filter_id,
220 		       struct ch_filter_specification *fs,
221 		       struct filter_ctx *ctx);
222 int cxgb4_set_filter(struct net_device *dev, int filter_id,
223 		     struct ch_filter_specification *fs);
224 int cxgb4_del_filter(struct net_device *dev, int filter_id,
225 		     struct ch_filter_specification *fs);
226 int cxgb4_get_filter_counters(struct net_device *dev, unsigned int fidx,
227 			      u64 *hitcnt, u64 *bytecnt, bool hash);
228 
set_wr_txq(struct sk_buff * skb,int prio,int queue)229 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
230 {
231 	skb_set_queue_mapping(skb, (queue << 1) | prio);
232 }
233 
234 enum cxgb4_uld {
235 	CXGB4_ULD_INIT,
236 	CXGB4_ULD_RDMA,
237 	CXGB4_ULD_ISCSI,
238 	CXGB4_ULD_ISCSIT,
239 	CXGB4_ULD_CRYPTO,
240 	CXGB4_ULD_TLS,
241 	CXGB4_ULD_MAX
242 };
243 
244 enum cxgb4_tx_uld {
245 	CXGB4_TX_OFLD,
246 	CXGB4_TX_CRYPTO,
247 	CXGB4_TX_MAX
248 };
249 
250 enum cxgb4_txq_type {
251 	CXGB4_TXQ_ETH,
252 	CXGB4_TXQ_ULD,
253 	CXGB4_TXQ_CTRL,
254 	CXGB4_TXQ_MAX
255 };
256 
257 enum cxgb4_state {
258 	CXGB4_STATE_UP,
259 	CXGB4_STATE_START_RECOVERY,
260 	CXGB4_STATE_DOWN,
261 	CXGB4_STATE_DETACH,
262 	CXGB4_STATE_FATAL_ERROR
263 };
264 
265 enum cxgb4_control {
266 	CXGB4_CONTROL_DB_FULL,
267 	CXGB4_CONTROL_DB_EMPTY,
268 	CXGB4_CONTROL_DB_DROP,
269 };
270 
271 struct pci_dev;
272 struct l2t_data;
273 struct net_device;
274 struct pkt_gl;
275 struct tp_tcp_stats;
276 struct t4_lro_mgr;
277 
278 struct cxgb4_range {
279 	unsigned int start;
280 	unsigned int size;
281 };
282 
283 struct cxgb4_virt_res {                      /* virtualized HW resources */
284 	struct cxgb4_range ddp;
285 	struct cxgb4_range iscsi;
286 	struct cxgb4_range stag;
287 	struct cxgb4_range rq;
288 	struct cxgb4_range srq;
289 	struct cxgb4_range pbl;
290 	struct cxgb4_range qp;
291 	struct cxgb4_range cq;
292 	struct cxgb4_range ocq;
293 	struct cxgb4_range key;
294 	unsigned int ncrypto_fc;
295 	struct cxgb4_range ppod_edram;
296 };
297 
298 struct chcr_stats_debug {
299 	atomic_t cipher_rqst;
300 	atomic_t digest_rqst;
301 	atomic_t aead_rqst;
302 	atomic_t complete;
303 	atomic_t error;
304 	atomic_t fallback;
305 	atomic_t ipsec_cnt;
306 	atomic_t tls_pdu_tx;
307 	atomic_t tls_pdu_rx;
308 	atomic_t tls_key;
309 };
310 
311 #define OCQ_WIN_OFFSET(pdev, vres) \
312 	(pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
313 
314 /*
315  * Block of information the LLD provides to ULDs attaching to a device.
316  */
317 struct cxgb4_lld_info {
318 	struct pci_dev *pdev;                /* associated PCI device */
319 	struct l2t_data *l2t;                /* L2 table */
320 	struct tid_info *tids;               /* TID table */
321 	struct net_device **ports;           /* device ports */
322 	const struct cxgb4_virt_res *vr;     /* assorted HW resources */
323 	const unsigned short *mtus;          /* MTU table */
324 	const unsigned short *rxq_ids;       /* the ULD's Rx queue ids */
325 	const unsigned short *ciq_ids;       /* the ULD's concentrator IQ ids */
326 	unsigned short nrxq;                 /* # of Rx queues */
327 	unsigned short ntxq;                 /* # of Tx queues */
328 	unsigned short nciq;		     /* # of concentrator IQ */
329 	unsigned char nchan:4;               /* # of channels */
330 	unsigned char nports:4;              /* # of ports */
331 	unsigned char wr_cred;               /* WR 16-byte credits */
332 	unsigned char adapter_type;          /* type of adapter */
333 	unsigned char fw_api_ver;            /* FW API version */
334 	unsigned char crypto;                /* crypto support */
335 	unsigned int fw_vers;                /* FW version */
336 	unsigned int iscsi_iolen;            /* iSCSI max I/O length */
337 	unsigned int cclk_ps;                /* Core clock period in psec */
338 	unsigned short udb_density;          /* # of user DB/page */
339 	unsigned short ucq_density;          /* # of user CQs/page */
340 	unsigned int sge_host_page_size;     /* SGE host page size */
341 	unsigned short filt_mode;            /* filter optional components */
342 	unsigned short tx_modq[NCHAN];       /* maps each tx channel to a */
343 					     /* scheduler queue */
344 	void __iomem *gts_reg;               /* address of GTS register */
345 	void __iomem *db_reg;                /* address of kernel doorbell */
346 	int dbfifo_int_thresh;		     /* doorbell fifo int threshold */
347 	unsigned int sge_ingpadboundary;     /* SGE ingress padding boundary */
348 	unsigned int sge_egrstatuspagesize;  /* SGE egress status page size */
349 	unsigned int sge_pktshift;           /* Padding between CPL and */
350 					     /*	packet data */
351 	unsigned int pf;		     /* Physical Function we're using */
352 	bool enable_fw_ofld_conn;            /* Enable connection through fw */
353 					     /* WR */
354 	unsigned int max_ordird_qp;          /* Max ORD/IRD depth per RDMA QP */
355 	unsigned int max_ird_adapter;        /* Max IRD memory per adapter */
356 	bool ulptx_memwrite_dsgl;            /* use of T5 DSGL allowed */
357 	unsigned int iscsi_tagmask;	     /* iscsi ddp tag mask */
358 	unsigned int iscsi_pgsz_order;	     /* iscsi ddp page size orders */
359 	unsigned int iscsi_llimit;	     /* chip's iscsi region llimit */
360 	unsigned int ulp_crypto;             /* crypto lookaside support */
361 	void **iscsi_ppm;		     /* iscsi page pod manager */
362 	int nodeid;			     /* device numa node id */
363 	bool fr_nsmr_tpte_wr_support;	     /* FW supports FR_NSMR_TPTE_WR */
364 	bool write_w_imm_support;         /* FW supports WRITE_WITH_IMMEDIATE */
365 	bool write_cmpl_support;             /* FW supports WRITE_CMPL WR */
366 };
367 
368 struct cxgb4_uld_info {
369 	char name[IFNAMSIZ];
370 	void *handle;
371 	unsigned int nrxq;
372 	unsigned int rxq_size;
373 	unsigned int ntxq;
374 	bool ciq;
375 	bool lro;
376 	void *(*add)(const struct cxgb4_lld_info *p);
377 	int (*rx_handler)(void *handle, const __be64 *rsp,
378 			  const struct pkt_gl *gl);
379 	int (*state_change)(void *handle, enum cxgb4_state new_state);
380 	int (*control)(void *handle, enum cxgb4_control control, ...);
381 	int (*lro_rx_handler)(void *handle, const __be64 *rsp,
382 			      const struct pkt_gl *gl,
383 			      struct t4_lro_mgr *lro_mgr,
384 			      struct napi_struct *napi);
385 	void (*lro_flush)(struct t4_lro_mgr *);
386 	int (*tx_handler)(struct sk_buff *skb, struct net_device *dev);
387 };
388 
389 void cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
390 int cxgb4_unregister_uld(enum cxgb4_uld type);
391 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
392 int cxgb4_immdata_send(struct net_device *dev, unsigned int idx,
393 		       const void *src, unsigned int len);
394 int cxgb4_crypto_send(struct net_device *dev, struct sk_buff *skb);
395 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
396 unsigned int cxgb4_port_chan(const struct net_device *dev);
397 unsigned int cxgb4_port_e2cchan(const struct net_device *dev);
398 unsigned int cxgb4_port_viid(const struct net_device *dev);
399 unsigned int cxgb4_tp_smt_idx(enum chip_type chip, unsigned int viid);
400 unsigned int cxgb4_port_idx(const struct net_device *dev);
401 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
402 			    unsigned int *idx);
403 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus,
404 				    unsigned short header_size,
405 				    unsigned short data_size_max,
406 				    unsigned short data_size_align,
407 				    unsigned int *mtu_idxp);
408 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
409 			 struct tp_tcp_stats *v6);
410 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
411 		      const unsigned int *pgsz_order);
412 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
413 				   unsigned int skb_len, unsigned int pull_len);
414 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
415 int cxgb4_flush_eq_cache(struct net_device *dev);
416 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte);
417 u64 cxgb4_read_sge_timestamp(struct net_device *dev);
418 
419 enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS };
420 int cxgb4_bar2_sge_qregs(struct net_device *dev,
421 			 unsigned int qid,
422 			 enum cxgb4_bar2_qtype qtype,
423 			 int user,
424 			 u64 *pbar2_qoffset,
425 			 unsigned int *pbar2_qid);
426 
427 #endif  /* !__CXGB4_ULD_H */
428