2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012, 2015 Chelsio Communications, Inc.
6 * Written by: Navdeep Parhar <np@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include "common/t4_hw.h"
37 #include "tom/t4_tls.h"
39 #define LISTEN_HASH_SIZE 32
42 * Min receive window. We want it to be large enough to accommodate receive
43 * coalescing, handle jumbo frames, and not trigger sender SWS avoidance.
45 #define MIN_RCV_WND (24 * 1024U)
48 * Max receive window supported by HW in bytes. Only a small part of it can
49 * be set through option0, the rest needs to be set through RX_DATA_ACK.
51 #define MAX_RCV_WND ((1U << 27) - 1)
53 #define DDP_RSVD_WIN (16 * 1024U)
54 #define SB_DDP_INDICATE SB_IN_TOE /* soreceive must respond to indicate */
56 #define USE_DDP_RX_FLOW_CONTROL
58 #define PPOD_SZ(n) ((n) * sizeof(struct pagepod))
59 #define PPOD_SIZE (PPOD_SZ(1))
63 TPF_ATTACHED = (1 << 0), /* a tcpcb refers to this toepcb */
64 TPF_FLOWC_WR_SENT = (1 << 1), /* firmware flow context WR sent */
65 TPF_TX_DATA_SENT = (1 << 2), /* some data sent */
66 TPF_TX_SUSPENDED = (1 << 3), /* tx suspended for lack of resources */
67 TPF_SEND_FIN = (1 << 4), /* send FIN after all pending data */
68 TPF_FIN_SENT = (1 << 5), /* FIN has been sent */
69 TPF_ABORT_SHUTDOWN = (1 << 6), /* connection abort is in progress */
70 TPF_CPL_PENDING = (1 << 7), /* haven't received the last CPL */
71 TPF_SYNQE = (1 << 8), /* synq_entry, not really a toepcb */
72 TPF_SYNQE_EXPANDED = (1 << 9), /* toepcb ready, tid context updated */
73 TPF_FORCE_CREDITS = (1 << 10), /* always send credits */
77 DDP_OK = (1 << 0), /* OK to turn on DDP */
78 DDP_SC_REQ = (1 << 1), /* state change (on/off) requested */
79 DDP_ON = (1 << 2), /* DDP is turned on */
80 DDP_BUF0_ACTIVE = (1 << 3), /* buffer 0 in use (not invalidated) */
81 DDP_BUF1_ACTIVE = (1 << 4), /* buffer 1 in use (not invalidated) */
82 DDP_TASK_ACTIVE = (1 << 5), /* requeue task is queued / running */
83 DDP_DEAD = (1 << 6), /* toepcb is shutting down */
87 struct offload_settings;
89 struct ofld_tx_sdesc {
90 uint32_t plen; /* payload length */
91 uint8_t tx_credits; /* firmware tx credits (unit is 16B) */
92 void *iv_buffer; /* optional buffer holding IVs for TLS */
98 u_int pr_page_shift[4];
99 uint32_t pr_tag_mask; /* hardware tagmask for this region. */
100 uint32_t pr_invalid_bit; /* OR with this to invalidate tag. */
101 uint32_t pr_alias_mask; /* AND with tag to get alias bits. */
102 u_int pr_alias_shift; /* shift this much for first alias bit. */
106 struct ppod_reservation {
107 struct ppod_region *prsv_pr;
108 uint32_t prsv_tag; /* Full tag: pgsz, alias, tag, color */
113 TAILQ_ENTRY(pageset) link;
117 int offset; /* offset in first page */
119 struct ppod_reservation prsv;
125 TAILQ_HEAD(pagesetq, pageset);
127 #define PS_PPODS_WRITTEN 0x0001 /* Page pods written to the card. */
138 struct ddp_buffer db[2];
139 TAILQ_HEAD(, pageset) cached_pagesets;
140 TAILQ_HEAD(, kaiocb) aiojobq;
144 int active_id; /* the currently active DDP buffer */
145 struct task requeue_task;
146 struct kaiocb *queueing;
151 TAILQ_ENTRY(toepcb) link; /* toep_list */
152 u_int flags; /* miscellaneous flags */
155 struct inpcb *inp; /* backpointer to host stack's PCB */
157 struct vi_info *vi; /* virtual interface */
158 struct sge_wrq *ofld_txq;
159 struct sge_ofld_rxq *ofld_rxq;
160 struct sge_wrq *ctrlq;
161 struct l2t_entry *l2te; /* L2 table entry used by this connection */
162 struct clip_entry *ce; /* CLIP table entry used by this tid */
163 int tid; /* Connection identifier */
164 int tc_idx; /* traffic class that this tid is bound to */
166 /* tx credit handling */
167 u_int tx_total; /* total tx WR credits (in 16B units) */
168 u_int tx_credits; /* tx WR credits (in 16B units) available */
169 u_int tx_nocompl; /* tx WR credits since last compl request */
170 u_int plen_nocompl; /* payload since last compl request */
172 uint16_t opt0_rcv_bufsize; /* XXX: save full opt0/opt2 for later? */
177 u_int ulp_mode; /* ULP mode */
180 struct mbufq ulp_pduq; /* PDUs waiting to be sent out. */
181 struct mbufq ulp_pdu_reclaimq;
184 struct tls_ofld_info tls;
186 TAILQ_HEAD(, kaiocb) aiotx_jobq;
187 struct task aiotx_task;
188 struct socket *aiotx_so;
190 /* Tx software descriptor */
195 struct ofld_tx_sdesc txsd[];
198 #define DDP_LOCK(toep) mtx_lock(&(toep)->ddp.lock)
199 #define DDP_UNLOCK(toep) mtx_unlock(&(toep)->ddp.lock)
200 #define DDP_ASSERT_LOCKED(toep) mtx_assert(&(toep)->ddp.lock, MA_OWNED)
202 struct flowc_tx_params {
205 unsigned int snd_space;
210 * Compressed state for embryonic connections for a listener.
213 struct listen_ctx *lctx; /* backpointer to listen ctx */
215 int flags; /* same as toepcb's tp_flags */
216 volatile int ok_to_respond;
217 volatile u_int refcnt;
226 uint16_t rcv_bufsize;
227 __be16 tcp_opt; /* from cpl_pass_establish */
231 /* listen_ctx flags */
232 #define LCTX_RPL_PENDING 1 /* waiting for a CPL_PASS_OPEN_RPL */
235 LIST_ENTRY(listen_ctx) link; /* listen hash linkage */
236 volatile int refcount;
238 struct stid_region stid_region;
240 struct inpcb *inp; /* listening socket's inp */
242 struct sge_wrq *ctrlq;
243 struct sge_ofld_rxq *ofld_rxq;
244 struct clip_entry *ce;
247 /* tcb_histent flags */
248 #define TE_RPL_PENDING 1
251 /* bits in one 8b tcb_histent sample. */
252 #define TS_RTO (1 << 0)
253 #define TS_DUPACKS (1 << 1)
254 #define TS_FASTREXMT (1 << 2)
255 #define TS_SND_BACKLOGGED (1 << 3)
256 #define TS_CWND_LIMITED (1 << 4)
257 #define TS_ECN_ECE (1 << 5)
258 #define TS_ECN_CWR (1 << 6)
259 #define TS_RESERVED (1 << 7) /* Unused. */
263 struct callout te_callout;
264 uint64_t te_tcb[TCB_SIZE / sizeof(uint64_t)];
265 struct adapter *te_adapter;
269 uint8_t te_sample[100];
275 /* toepcb's associated with this TOE device */
276 struct mtx toep_list_lock;
277 TAILQ_HEAD(, toepcb) toep_list;
279 struct mtx lctx_hash_lock;
280 LIST_HEAD(, listen_ctx) *listen_hash;
282 int lctx_count; /* # of lctx in the hash table */
284 struct ppod_region pr;
286 struct rwlock tcb_history_lock __aligned(CACHE_LINE_SIZE);
287 struct tcb_histent **tcb_history;
288 int dupack_threshold;
290 /* WRs that will not be sent to the chip because L2 resolution failed */
291 struct mtx unsent_wr_lock;
292 STAILQ_HEAD(, wrqe) unsent_wr_list;
293 struct task reclaim_wr_resources;
296 static inline struct tom_data *
297 tod_td(struct toedev *tod)
300 return (__containerof(tod, struct tom_data, tod));
303 static inline struct adapter *
304 td_adapter(struct tom_data *td)
307 return (td->tod.tod_softc);
311 set_mbuf_ulp_submode(struct mbuf *m, uint8_t ulp_submode)
315 m->m_pkthdr.PH_per.eight[0] = ulp_submode;
318 static inline uint8_t
319 mbuf_ulp_submode(struct mbuf *m)
323 return (m->m_pkthdr.PH_per.eight[0]);
327 struct toepcb *alloc_toepcb(struct vi_info *, int, int, int);
328 struct toepcb *hold_toepcb(struct toepcb *);
329 void free_toepcb(struct toepcb *);
330 void offload_socket(struct socket *, struct toepcb *);
331 void undo_offload_socket(struct socket *);
332 void final_cpl_received(struct toepcb *);
333 void insert_tid(struct adapter *, int, void *, int);
334 void *lookup_tid(struct adapter *, int);
335 void update_tid(struct adapter *, int, void *);
336 void remove_tid(struct adapter *, int, int);
337 int find_best_mtu_idx(struct adapter *, struct in_conninfo *,
338 struct offload_settings *);
339 u_long select_rcv_wnd(struct socket *);
340 int select_rcv_wscale(void);
341 uint64_t calc_opt0(struct socket *, struct vi_info *, struct l2t_entry *,
342 int, int, int, int, struct offload_settings *);
343 uint64_t select_ntuple(struct vi_info *, struct l2t_entry *);
344 int select_ulp_mode(struct socket *, struct adapter *,
345 struct offload_settings *);
346 void set_ulp_mode(struct toepcb *, int);
347 int negative_advice(int);
348 int add_tid_to_history(struct adapter *, u_int);
351 void t4_init_connect_cpl_handlers(void);
352 void t4_uninit_connect_cpl_handlers(void);
353 int t4_connect(struct toedev *, struct socket *, struct rtentry *,
355 void act_open_failure_cleanup(struct adapter *, u_int, u_int);
358 void t4_init_listen_cpl_handlers(void);
359 void t4_uninit_listen_cpl_handlers(void);
360 int t4_listen_start(struct toedev *, struct tcpcb *);
361 int t4_listen_stop(struct toedev *, struct tcpcb *);
362 void t4_syncache_added(struct toedev *, void *);
363 void t4_syncache_removed(struct toedev *, void *);
364 int t4_syncache_respond(struct toedev *, void *, struct mbuf *);
365 int do_abort_req_synqe(struct sge_iq *, const struct rss_header *,
367 int do_abort_rpl_synqe(struct sge_iq *, const struct rss_header *,
369 void t4_offload_socket(struct toedev *, void *, struct socket *);
370 void synack_failure_cleanup(struct adapter *, int);
373 void aiotx_init_toep(struct toepcb *);
374 int t4_aio_queue_aiotx(struct socket *, struct kaiocb *);
375 void t4_init_cpl_io_handlers(void);
376 void t4_uninit_cpl_io_handlers(void);
377 void send_abort_rpl(struct adapter *, struct sge_wrq *, int , int);
378 void send_flowc_wr(struct toepcb *, struct flowc_tx_params *);
379 void send_reset(struct adapter *, struct toepcb *, uint32_t);
380 int send_rx_credits(struct adapter *, struct toepcb *, int);
381 void send_rx_modulate(struct adapter *, struct toepcb *);
382 void make_established(struct toepcb *, uint32_t, uint32_t, uint16_t);
383 int t4_close_conn(struct adapter *, struct toepcb *);
384 void t4_rcvd(struct toedev *, struct tcpcb *);
385 void t4_rcvd_locked(struct toedev *, struct tcpcb *);
386 int t4_tod_output(struct toedev *, struct tcpcb *);
387 int t4_send_fin(struct toedev *, struct tcpcb *);
388 int t4_send_rst(struct toedev *, struct tcpcb *);
389 void t4_set_tcb_field(struct adapter *, struct sge_wrq *, struct toepcb *,
390 uint16_t, uint64_t, uint64_t, int, int);
391 void t4_push_frames(struct adapter *sc, struct toepcb *toep, int drop);
392 void t4_push_pdus(struct adapter *sc, struct toepcb *toep, int drop);
395 int t4_init_ppod_region(struct ppod_region *, struct t4_range *, u_int,
397 void t4_free_ppod_region(struct ppod_region *);
398 int t4_alloc_page_pods_for_ps(struct ppod_region *, struct pageset *);
399 int t4_alloc_page_pods_for_buf(struct ppod_region *, vm_offset_t, int,
400 struct ppod_reservation *);
401 int t4_write_page_pods_for_ps(struct adapter *, struct sge_wrq *, int,
403 int t4_write_page_pods_for_buf(struct adapter *, struct sge_wrq *, int tid,
404 struct ppod_reservation *, vm_offset_t, int);
405 void t4_free_page_pods(struct ppod_reservation *);
406 int t4_soreceive_ddp(struct socket *, struct sockaddr **, struct uio *,
407 struct mbuf **, struct mbuf **, int *);
408 int t4_aio_queue_ddp(struct socket *, struct kaiocb *);
409 void t4_ddp_mod_load(void);
410 void t4_ddp_mod_unload(void);
411 void ddp_assert_empty(struct toepcb *);
412 void ddp_init_toep(struct toepcb *);
413 void ddp_uninit_toep(struct toepcb *);
414 void ddp_queue_toep(struct toepcb *);
415 void release_ddp_resources(struct toepcb *toep);
416 void handle_ddp_close(struct toepcb *, struct tcpcb *, uint32_t);
417 void handle_ddp_indicate(struct toepcb *);
418 void insert_ddp_data(struct toepcb *, uint32_t);
419 const struct offload_settings *lookup_offload_policy(struct adapter *, int,
420 struct mbuf *, uint16_t, struct inpcb *);
423 bool can_tls_offload(struct adapter *);
424 int t4_ctloutput_tls(struct socket *, struct sockopt *);
425 void t4_push_tls_records(struct adapter *, struct toepcb *, int);
426 void t4_tls_mod_load(void);
427 void t4_tls_mod_unload(void);
428 void tls_establish(struct toepcb *);
429 void tls_init_toep(struct toepcb *);
430 int tls_rx_key(struct toepcb *);
431 void tls_stop_handshake_timer(struct toepcb *);
432 int tls_tx_key(struct toepcb *);
433 void tls_uninit_toep(struct toepcb *);