1/*-
2 * Copyright (c) 2011 Chelsio Communications, Inc.
3 * All rights reserved.
4 * Written by: Navdeep Parhar <np@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: head/sys/dev/cxgbe/adapter.h 255005 2013-08-28 20:45:45Z np $
28 *
29 */
30
31#ifndef __T4_ADAPTER_H__
32#define __T4_ADAPTER_H__
33
34#include <sys/kernel.h>
35#include <sys/bus.h>
36#include <sys/rman.h>
37#include <sys/types.h>
38#include <sys/malloc.h>
39#include <dev/pci/pcivar.h>
40#include <dev/pci/pcireg.h>
41#include <machine/bus.h>
42#include <sys/socket.h>
43#include <sys/sysctl.h>
44#include <net/ethernet.h>
45#include <net/if.h>
46#include <net/if_media.h>
47#include <netinet/in.h>
48#include <netinet/tcp_lro.h>
49
50#include "offload.h"
51#include "firmware/t4fw_interface.h"
52
53MALLOC_DECLARE(M_CXGBE);
54#define CXGBE_UNIMPLEMENTED(s) \
55 panic("%s (%s, line %d) not implemented yet.", s, __FILE__, __LINE__)
56
57#if defined(__i386__) || defined(__amd64__)
58static __inline void
59prefetch(void *x)
60{
61 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
62}
63#else
64#define prefetch(x)
65#endif
66
67#ifndef SYSCTL_ADD_UQUAD
68#define SYSCTL_ADD_UQUAD SYSCTL_ADD_QUAD
69#define sysctl_handle_64 sysctl_handle_quad
70#define CTLTYPE_U64 CTLTYPE_QUAD
71#endif
72
73#if (__FreeBSD_version >= 900030) || \
74 ((__FreeBSD_version >= 802507) && (__FreeBSD_version < 900000))
75#define SBUF_DRAIN 1
76#endif
77
78#ifdef __amd64__
79/* XXX: need systemwide bus_space_read_8/bus_space_write_8 */
80static __inline uint64_t
81t4_bus_space_read_8(bus_space_tag_t tag, bus_space_handle_t handle,
82 bus_size_t offset)
83{
84 KASSERT(tag == X86_BUS_SPACE_MEM,
85 ("%s: can only handle mem space", __func__));
86
87 return (*(volatile uint64_t *)(handle + offset));
88}
89
90static __inline void
91t4_bus_space_write_8(bus_space_tag_t tag, bus_space_handle_t bsh,
92 bus_size_t offset, uint64_t value)
93{
94 KASSERT(tag == X86_BUS_SPACE_MEM,
95 ("%s: can only handle mem space", __func__));
96
97 *(volatile uint64_t *)(bsh + offset) = value;
98}
99#else
100static __inline uint64_t
101t4_bus_space_read_8(bus_space_tag_t tag, bus_space_handle_t handle,
102 bus_size_t offset)
103{
104 return (uint64_t)bus_space_read_4(tag, handle, offset) +
105 ((uint64_t)bus_space_read_4(tag, handle, offset + 4) << 32);
106}
107
108static __inline void
109t4_bus_space_write_8(bus_space_tag_t tag, bus_space_handle_t bsh,
110 bus_size_t offset, uint64_t value)
111{
112 bus_space_write_4(tag, bsh, offset, value);
113 bus_space_write_4(tag, bsh, offset + 4, value >> 32);
114}
115#endif
116
117struct adapter;
118typedef struct adapter adapter_t;
119
120enum {
121 FW_IQ_QSIZE = 256,
122 FW_IQ_ESIZE = 64, /* At least 64 mandated by the firmware spec */
123
124 RX_IQ_QSIZE = 1024,
125 RX_IQ_ESIZE = 64, /* At least 64 so CPL_RX_PKT will fit */
126
127 EQ_ESIZE = 64, /* All egress queues use this entry size */
128
129 RX_FL_ESIZE = EQ_ESIZE, /* 8 64bit addresses */
130#if MJUMPAGESIZE != MCLBYTES
131 FL_BUF_SIZES = 4, /* cluster, jumbop, jumbo9k, jumbo16k */
132#else
133 FL_BUF_SIZES = 3, /* cluster, jumbo9k, jumbo16k */
134#endif
135
136 CTRL_EQ_QSIZE = 128,
137
138 TX_EQ_QSIZE = 1024,
139 TX_SGL_SEGS = 36,
140 TX_WR_FLITS = SGE_MAX_WR_LEN / 8
141};
142
143enum {
144 /* adapter intr_type */
145 INTR_INTX = (1 << 0),
146 INTR_MSI = (1 << 1),
147 INTR_MSIX = (1 << 2)
148};
149
150enum {
151 /* flags understood by begin_synchronized_op */
152 HOLD_LOCK = (1 << 0),
153 SLEEP_OK = (1 << 1),
154 INTR_OK = (1 << 2),
155
156 /* flags understood by end_synchronized_op */
157 LOCK_HELD = HOLD_LOCK,
158};
159
160enum {
161 /* adapter flags */
162 FULL_INIT_DONE = (1 << 0),
163 FW_OK = (1 << 1),
164 INTR_DIRECT = (1 << 2), /* direct interrupts for everything */
165 MASTER_PF = (1 << 3),
166 ADAP_SYSCTL_CTX = (1 << 4),
167 TOM_INIT_DONE = (1 << 5),
168
169 CXGBE_BUSY = (1 << 9),
170
171 /* port flags */
172 DOOMED = (1 << 0),
173 PORT_INIT_DONE = (1 << 1),
174 PORT_SYSCTL_CTX = (1 << 2),
175 HAS_TRACEQ = (1 << 3),
176};
177
178#define IS_DOOMED(pi) ((pi)->flags & DOOMED)
179#define SET_DOOMED(pi) do {(pi)->flags |= DOOMED;} while (0)
180#define IS_BUSY(sc) ((sc)->flags & CXGBE_BUSY)
181#define SET_BUSY(sc) do {(sc)->flags |= CXGBE_BUSY;} while (0)
182#define CLR_BUSY(sc) do {(sc)->flags &= ~CXGBE_BUSY;} while (0)
183
184struct port_info {
185 device_t dev;
186 struct adapter *adapter;
187
188 struct ifnet *ifp;
189 struct ifmedia media;
190
191 struct mtx pi_lock;
192 char lockname[16];
193 unsigned long flags;
194 int if_flags;
195
196 uint16_t viid;
197 int16_t xact_addr_filt;/* index of exact MAC address filter */
198 uint16_t rss_size; /* size of VI's RSS table slice */
199 uint8_t lport; /* associated offload logical port */
200 int8_t mdio_addr;
201 uint8_t port_type;
202 uint8_t mod_type;
203 uint8_t port_id;
204 uint8_t tx_chan;
205
206 /* These need to be int as they are used in sysctl */
207 int ntxq; /* # of tx queues */
208 int first_txq; /* index of first tx queue */
209 int nrxq; /* # of rx queues */
210 int first_rxq; /* index of first rx queue */
211#ifdef TCP_OFFLOAD
212 int nofldtxq; /* # of offload tx queues */
213 int first_ofld_txq; /* index of first offload tx queue */
214 int nofldrxq; /* # of offload rx queues */
215 int first_ofld_rxq; /* index of first offload rx queue */
216#endif
217 int tmr_idx;
218 int pktc_idx;
219 int qsize_rxq;
220 int qsize_txq;
221
222 int linkdnrc;
223 struct link_config link_cfg;
224 struct port_stats stats;
225
226 eventhandler_tag vlan_c;
227
228 struct callout tick;
229 struct sysctl_ctx_list ctx; /* from ifconfig up to driver detach */
230
231 uint8_t hw_addr[ETHER_ADDR_LEN]; /* factory MAC address, won't change */
232};
233
234struct fl_sdesc {
235 struct mbuf *m;
236 bus_dmamap_t map;
237 caddr_t cl;
238 uint8_t tag_idx; /* the sc->fl_tag this map comes from */
239#ifdef INVARIANTS
240 __be64 ba_tag;
241#endif
242};
243
244struct tx_desc {
245 __be64 flit[8];
246};
247
248struct tx_map {
249 struct mbuf *m;
250 bus_dmamap_t map;
251};
252
253/* DMA maps used for tx */
254struct tx_maps {
255 struct tx_map *maps;
256 uint32_t map_total; /* # of DMA maps */
257 uint32_t map_pidx; /* next map to be used */
258 uint32_t map_cidx; /* reclaimed up to this index */
259 uint32_t map_avail; /* # of available maps */
260};
261
262struct tx_sdesc {
263 uint8_t desc_used; /* # of hardware descriptors used by the WR */
264 uint8_t credits; /* NIC txq: # of frames sent out in the WR */
265};
266
267enum {
268 /* iq flags */
269 IQ_ALLOCATED = (1 << 0), /* firmware resources allocated */
270 IQ_HAS_FL = (1 << 1), /* iq associated with a freelist */
271 IQ_INTR = (1 << 2), /* iq takes direct interrupt */
272 IQ_LRO_ENABLED = (1 << 3), /* iq is an eth rxq with LRO enabled */
273
274 /* iq state */
275 IQS_DISABLED = 0,
276 IQS_BUSY = 1,
277 IQS_IDLE = 2,
278};
279
280/*
281 * Ingress Queue: T4 is producer, driver is consumer.
282 */
283struct sge_iq {
284 bus_dma_tag_t desc_tag;
285 bus_dmamap_t desc_map;
286 bus_addr_t ba; /* bus address of descriptor ring */
287 uint32_t flags;
288 uint16_t abs_id; /* absolute SGE id for the iq */
289 int8_t intr_pktc_idx; /* packet count threshold index */
290 int8_t pad0;
291 __be64 *desc; /* KVA of descriptor ring */
292
293 volatile int state;
294 struct adapter *adapter;
295 const __be64 *cdesc; /* current descriptor */
296 uint8_t gen; /* generation bit */
297 uint8_t intr_params; /* interrupt holdoff parameters */
298 uint8_t intr_next; /* XXX: holdoff for next interrupt */
299 uint8_t esize; /* size (bytes) of each entry in the queue */
300 uint16_t qsize; /* size (# of entries) of the queue */
301 uint16_t cidx; /* consumer index */
302 uint16_t cntxt_id; /* SGE context id for the iq */
303
304 STAILQ_ENTRY(sge_iq) link;
305};
306
307enum {
308 EQ_CTRL = 1,
309 EQ_ETH = 2,
310#ifdef TCP_OFFLOAD
311 EQ_OFLD = 3,
312#endif
313
314 /* eq flags */
315 EQ_TYPEMASK = 7, /* 3 lsbits hold the type */
316 EQ_ALLOCATED = (1 << 3), /* firmware resources allocated */
317 EQ_DOOMED = (1 << 4), /* about to be destroyed */
318 EQ_CRFLUSHED = (1 << 5), /* expecting an update from SGE */
319 EQ_STALLED = (1 << 6), /* out of hw descriptors or dmamaps */
320};
321
322/* Listed in order of preference. Update t4_sysctls too if you change these */
323enum {DOORBELL_UDB, DOORBELL_WCWR, DOORBELL_UDBWC, DOORBELL_KDB};
324
325/*
326 * Egress Queue: driver is producer, T4 is consumer.
327 *
328 * Note: A free list is an egress queue (driver produces the buffers and T4
329 * consumes them) but it's special enough to have its own struct (see sge_fl).
330 */
331struct sge_eq {
332 unsigned int flags; /* MUST be first */
333 unsigned int cntxt_id; /* SGE context id for the eq */
334 bus_dma_tag_t desc_tag;
335 bus_dmamap_t desc_map;
336 char lockname[16];
337 struct mtx eq_lock;
338
339 struct tx_desc *desc; /* KVA of descriptor ring */
340 bus_addr_t ba; /* bus address of descriptor ring */
341 struct sge_qstat *spg; /* status page, for convenience */
342 int doorbells;
343 volatile uint32_t *udb; /* KVA of doorbell (lies within BAR2) */
344 u_int udb_qid; /* relative qid within the doorbell page */
345 uint16_t cap; /* max # of desc, for convenience */
346 uint16_t avail; /* available descriptors, for convenience */
347 uint16_t qsize; /* size (# of entries) of the queue */
348 uint16_t cidx; /* consumer idx (desc idx) */
349 uint16_t pidx; /* producer idx (desc idx) */
350 uint16_t pending; /* # of descriptors used since last doorbell */
351 uint16_t iqid; /* iq that gets egr_update for the eq */
352 uint8_t tx_chan; /* tx channel used by the eq */
353 struct task tx_task;
354 struct callout tx_callout;
355
356 /* stats */
357
358 uint32_t egr_update; /* # of SGE_EGR_UPDATE notifications for eq */
359 uint32_t unstalled; /* recovered from stall */
360};
361
362enum {
363 FL_STARVING = (1 << 0), /* on the adapter's list of starving fl's */
364 FL_DOOMED = (1 << 1), /* about to be destroyed */
365};
366
367#define FL_RUNNING_LOW(fl) (fl->cap - fl->needed <= fl->lowat)
368#define FL_NOT_RUNNING_LOW(fl) (fl->cap - fl->needed >= 2 * fl->lowat)
369
370struct sge_fl {
371 bus_dma_tag_t desc_tag;
372 bus_dmamap_t desc_map;
373 bus_dma_tag_t tag[FL_BUF_SIZES];
374 uint8_t tag_idx;
375 struct mtx fl_lock;
376 char lockname[16];
377 int flags;
378
379 __be64 *desc; /* KVA of descriptor ring, ptr to addresses */
380 bus_addr_t ba; /* bus address of descriptor ring */
381 struct fl_sdesc *sdesc; /* KVA of software descriptor ring */
382 uint32_t cap; /* max # of buffers, for convenience */
383 uint16_t qsize; /* size (# of entries) of the queue */
384 uint16_t cntxt_id; /* SGE context id for the freelist */
385 uint32_t cidx; /* consumer idx (buffer idx, NOT hw desc idx) */
386 uint32_t pidx; /* producer idx (buffer idx, NOT hw desc idx) */
387 uint32_t needed; /* # of buffers needed to fill up fl. */
388 uint32_t lowat; /* # of buffers <= this means fl needs help */
389 uint32_t pending; /* # of bufs allocated since last doorbell */
390 unsigned int dmamap_failed;
391 TAILQ_ENTRY(sge_fl) link; /* All starving freelists */
392};
393
394/* txq: SGE egress queue + what's needed for Ethernet NIC */
395struct sge_txq {
396 struct sge_eq eq; /* MUST be first */
397
398 struct ifnet *ifp; /* the interface this txq belongs to */
399 bus_dma_tag_t tx_tag; /* tag for transmit buffers */
400 struct buf_ring *br; /* tx buffer ring */
401 struct tx_sdesc *sdesc; /* KVA of software descriptor ring */
402 struct mbuf *m; /* held up due to temporary resource shortage */
403
404 struct tx_maps txmaps;
405
406 /* stats for common events first */
407
408 uint64_t txcsum; /* # of times hardware assisted with checksum */
409 uint64_t tso_wrs; /* # of TSO work requests */
410 uint64_t vlan_insertion;/* # of times VLAN tag was inserted */
411 uint64_t imm_wrs; /* # of work requests with immediate data */
412 uint64_t sgl_wrs; /* # of work requests with direct SGL */
413 uint64_t txpkt_wrs; /* # of txpkt work requests (not coalesced) */
414 uint64_t txpkts_wrs; /* # of coalesced tx work requests */
415 uint64_t txpkts_pkts; /* # of frames in coalesced tx work requests */
416
417 /* stats for not-that-common events */
418
419 uint32_t no_dmamap; /* no DMA map to load the mbuf */
420 uint32_t no_desc; /* out of hardware descriptors */
421} __aligned(CACHE_LINE_SIZE);
422
423/* rxq: SGE ingress queue + SGE free list + miscellaneous items */
424struct sge_rxq {
425 struct sge_iq iq; /* MUST be first */
426 struct sge_fl fl; /* MUST follow iq */
427
428 struct ifnet *ifp; /* the interface this rxq belongs to */
429#if defined(INET) || defined(INET6)
430 struct lro_ctrl lro; /* LRO state */
431#endif
432
433 /* stats for common events first */
434
435 uint64_t rxcsum; /* # of times hardware assisted with checksum */
436 uint64_t vlan_extraction;/* # of times VLAN tag was extracted */
437
438 /* stats for not-that-common events */
439
440} __aligned(CACHE_LINE_SIZE);
441
442static inline struct sge_rxq *
443iq_to_rxq(struct sge_iq *iq)
444{
445
446 return (__containerof(iq, struct sge_rxq, iq));
447}
448
449
450#ifdef TCP_OFFLOAD
451/* ofld_rxq: SGE ingress queue + SGE free list + miscellaneous items */
452struct sge_ofld_rxq {
453 struct sge_iq iq; /* MUST be first */
454 struct sge_fl fl; /* MUST follow iq */
455} __aligned(CACHE_LINE_SIZE);
456
457static inline struct sge_ofld_rxq *
458iq_to_ofld_rxq(struct sge_iq *iq)
459{
460
461 return (__containerof(iq, struct sge_ofld_rxq, iq));
462}
463#endif
464
465struct wrqe {
466 STAILQ_ENTRY(wrqe) link;
467 struct sge_wrq *wrq;
468 int wr_len;
469 uint64_t wr[] __aligned(16);
470};
471
472/*
473 * wrq: SGE egress queue that is given prebuilt work requests. Both the control
474 * and offload tx queues are of this type.
475 */
476struct sge_wrq {
477 struct sge_eq eq; /* MUST be first */
478
479 struct adapter *adapter;
480
481 /* List of WRs held up due to lack of tx descriptors */
482 STAILQ_HEAD(, wrqe) wr_list;
483
484 /* stats for common events first */
485
486 uint64_t tx_wrs; /* # of tx work requests */
487
488 /* stats for not-that-common events */
489
490 uint32_t no_desc; /* out of hardware descriptors */
491} __aligned(CACHE_LINE_SIZE);
492
493struct sge {
494 int timer_val[SGE_NTIMERS];
495 int counter_val[SGE_NCOUNTERS];
496 int fl_starve_threshold;
497 int s_qpp;
498
499 int nrxq; /* total # of Ethernet rx queues */
500 int ntxq; /* total # of Ethernet tx tx queues */
501#ifdef TCP_OFFLOAD
502 int nofldrxq; /* total # of TOE rx queues */
503 int nofldtxq; /* total # of TOE tx queues */
504#endif
505 int niq; /* total # of ingress queues */
506 int neq; /* total # of egress queues */
507
508 struct sge_iq fwq; /* Firmware event queue */
509 struct sge_wrq mgmtq; /* Management queue (control queue) */
510 struct sge_wrq *ctrlq; /* Control queues */
511 struct sge_txq *txq; /* NIC tx queues */
512 struct sge_rxq *rxq; /* NIC rx queues */
513#ifdef TCP_OFFLOAD
514 struct sge_wrq *ofld_txq; /* TOE tx queues */
515 struct sge_ofld_rxq *ofld_rxq; /* TOE rx queues */
516#endif
517
518 uint16_t iq_start;
519 int eq_start;
520 struct sge_iq **iqmap; /* iq->cntxt_id to iq mapping */
521 struct sge_eq **eqmap; /* eq->cntxt_id to eq mapping */
522};
523
524struct rss_header;
525typedef int (*cpl_handler_t)(struct sge_iq *, const struct rss_header *,
526 struct mbuf *);
527typedef int (*an_handler_t)(struct sge_iq *, const struct rsp_ctrl *);
528typedef int (*fw_msg_handler_t)(struct adapter *, const __be64 *);
529
530struct adapter {
531 SLIST_ENTRY(adapter) link;
532 device_t dev;
533 struct cdev *cdev;
534
535 /* PCIe register resources */
536 int regs_rid;
537 struct resource *regs_res;
538 int msix_rid;
539 struct resource *msix_res;
540 bus_space_handle_t bh;
541 bus_space_tag_t bt;
542 bus_size_t mmio_len;
543 int udbs_rid;
544 struct resource *udbs_res;
545 volatile uint8_t *udbs_base;
546
547 unsigned int pf;
548 unsigned int mbox;
549
550 /* Interrupt information */
551 int intr_type;
552 int intr_count;
553 struct irq {
554 struct resource *res;
555 int rid;
556 void *tag;
557 } *irq;
558
559 bus_dma_tag_t dmat; /* Parent DMA tag */
560
561 struct sge sge;
562
563 struct taskqueue *tq[NCHAN]; /* taskqueues that flush data out */
564 struct port_info *port[MAX_NPORTS];
565 uint8_t chan_map[NCHAN];
566
567#ifdef TCP_OFFLOAD
568 void *tom_softc; /* (struct tom_data *) */
569 struct tom_tunables tt;
570 void *iwarp_softc; /* (struct c4iw_dev *) */
571#endif
572 struct l2t_data *l2t; /* L2 table */
573 struct tid_info tids;
574
575 int doorbells;
576 int open_device_map;
577#ifdef TCP_OFFLOAD
578 int offload_map;
579#endif
580 int flags;
581
582 char ifp_lockname[16];
583 struct mtx ifp_lock;
584 struct ifnet *ifp; /* tracer ifp */
585 struct ifmedia media;
586 int traceq; /* iq used by all tracers, -1 if none */
587 int tracer_valid; /* bitmap of valid tracers */
588 int tracer_enabled; /* bitmap of enabled tracers */
589
590 char fw_version[32];
591 char cfg_file[32];
592 u_int cfcsum;
593 struct adapter_params params;
594 struct t4_virt_res vres;
595
596 uint16_t linkcaps;
597 uint16_t niccaps;
598 uint16_t toecaps;
599 uint16_t rdmacaps;
600 uint16_t iscsicaps;
601 uint16_t fcoecaps;
602
603 struct sysctl_ctx_list ctx; /* from adapter_full_init to full_uninit */
604
605 struct mtx sc_lock;
606 char lockname[16];
607
608 /* Starving free lists */
609 struct mtx sfl_lock; /* same cache-line as sc_lock? but that's ok */
610 TAILQ_HEAD(, sge_fl) sfl;
611 struct callout sfl_callout;
612
613 an_handler_t an_handler __aligned(CACHE_LINE_SIZE);
614 fw_msg_handler_t fw_msg_handler[5]; /* NUM_FW6_TYPES */
615 cpl_handler_t cpl_handler[0xef]; /* NUM_CPL_CMDS */
616
617#ifdef INVARIANTS
618 const char *last_op;
619 const void *last_op_thr;
620#endif
621};
622
623#define ADAPTER_LOCK(sc) mtx_lock(&(sc)->sc_lock)
624#define ADAPTER_UNLOCK(sc) mtx_unlock(&(sc)->sc_lock)
625#define ADAPTER_LOCK_ASSERT_OWNED(sc) mtx_assert(&(sc)->sc_lock, MA_OWNED)
626#define ADAPTER_LOCK_ASSERT_NOTOWNED(sc) mtx_assert(&(sc)->sc_lock, MA_NOTOWNED)
627
628/* XXX: not bulletproof, but much better than nothing */
629#define ASSERT_SYNCHRONIZED_OP(sc) \
630 KASSERT(IS_BUSY(sc) && \
631 (mtx_owned(&(sc)->sc_lock) || sc->last_op_thr == curthread), \
632 ("%s: operation not synchronized.", __func__))
633
634#define PORT_LOCK(pi) mtx_lock(&(pi)->pi_lock)
635#define PORT_UNLOCK(pi) mtx_unlock(&(pi)->pi_lock)
636#define PORT_LOCK_ASSERT_OWNED(pi) mtx_assert(&(pi)->pi_lock, MA_OWNED)
637#define PORT_LOCK_ASSERT_NOTOWNED(pi) mtx_assert(&(pi)->pi_lock, MA_NOTOWNED)
638
639#define FL_LOCK(fl) mtx_lock(&(fl)->fl_lock)
640#define FL_TRYLOCK(fl) mtx_trylock(&(fl)->fl_lock)
641#define FL_UNLOCK(fl) mtx_unlock(&(fl)->fl_lock)
642#define FL_LOCK_ASSERT_OWNED(fl) mtx_assert(&(fl)->fl_lock, MA_OWNED)
643#define FL_LOCK_ASSERT_NOTOWNED(fl) mtx_assert(&(fl)->fl_lock, MA_NOTOWNED)
644
645#define RXQ_FL_LOCK(rxq) FL_LOCK(&(rxq)->fl)
646#define RXQ_FL_UNLOCK(rxq) FL_UNLOCK(&(rxq)->fl)
647#define RXQ_FL_LOCK_ASSERT_OWNED(rxq) FL_LOCK_ASSERT_OWNED(&(rxq)->fl)
648#define RXQ_FL_LOCK_ASSERT_NOTOWNED(rxq) FL_LOCK_ASSERT_NOTOWNED(&(rxq)->fl)
649
650#define EQ_LOCK(eq) mtx_lock(&(eq)->eq_lock)
651#define EQ_TRYLOCK(eq) mtx_trylock(&(eq)->eq_lock)
652#define EQ_UNLOCK(eq) mtx_unlock(&(eq)->eq_lock)
653#define EQ_LOCK_ASSERT_OWNED(eq) mtx_assert(&(eq)->eq_lock, MA_OWNED)
654#define EQ_LOCK_ASSERT_NOTOWNED(eq) mtx_assert(&(eq)->eq_lock, MA_NOTOWNED)
655
656#define TXQ_LOCK(txq) EQ_LOCK(&(txq)->eq)
657#define TXQ_TRYLOCK(txq) EQ_TRYLOCK(&(txq)->eq)
658#define TXQ_UNLOCK(txq) EQ_UNLOCK(&(txq)->eq)
659#define TXQ_LOCK_ASSERT_OWNED(txq) EQ_LOCK_ASSERT_OWNED(&(txq)->eq)
660#define TXQ_LOCK_ASSERT_NOTOWNED(txq) EQ_LOCK_ASSERT_NOTOWNED(&(txq)->eq)
661
662#define for_each_txq(pi, iter, q) \
663 for (q = &pi->adapter->sge.txq[pi->first_txq], iter = 0; \
664 iter < pi->ntxq; ++iter, ++q)
665#define for_each_rxq(pi, iter, q) \
666 for (q = &pi->adapter->sge.rxq[pi->first_rxq], iter = 0; \
667 iter < pi->nrxq; ++iter, ++q)
668#define for_each_ofld_txq(pi, iter, q) \
669 for (q = &pi->adapter->sge.ofld_txq[pi->first_ofld_txq], iter = 0; \
670 iter < pi->nofldtxq; ++iter, ++q)
671#define for_each_ofld_rxq(pi, iter, q) \
672 for (q = &pi->adapter->sge.ofld_rxq[pi->first_ofld_rxq], iter = 0; \
673 iter < pi->nofldrxq; ++iter, ++q)
674
675/* One for errors, one for firmware events */
676#define T4_EXTRA_INTR 2
677
678static inline uint32_t
679t4_read_reg(struct adapter *sc, uint32_t reg)
680{
681
682 return bus_space_read_4(sc->bt, sc->bh, reg);
683}
684
685static inline void
686t4_write_reg(struct adapter *sc, uint32_t reg, uint32_t val)
687{
688
689 bus_space_write_4(sc->bt, sc->bh, reg, val);
690}
691
692static inline uint64_t
693t4_read_reg64(struct adapter *sc, uint32_t reg)
694{
695
696 return t4_bus_space_read_8(sc->bt, sc->bh, reg);
697}
698
699static inline void
700t4_write_reg64(struct adapter *sc, uint32_t reg, uint64_t val)
701{
702
703 t4_bus_space_write_8(sc->bt, sc->bh, reg, val);
704}
705
706static inline void
707t4_os_pci_read_cfg1(struct adapter *sc, int reg, uint8_t *val)
708{
709
710 *val = pci_read_config(sc->dev, reg, 1);
711}
712
713static inline void
714t4_os_pci_write_cfg1(struct adapter *sc, int reg, uint8_t val)
715{
716
717 pci_write_config(sc->dev, reg, val, 1);
718}
719
720static inline void
721t4_os_pci_read_cfg2(struct adapter *sc, int reg, uint16_t *val)
722{
723
724 *val = pci_read_config(sc->dev, reg, 2);
725}
726
727static inline void
728t4_os_pci_write_cfg2(struct adapter *sc, int reg, uint16_t val)
729{
730
731 pci_write_config(sc->dev, reg, val, 2);
732}
733
734static inline void
735t4_os_pci_read_cfg4(struct adapter *sc, int reg, uint32_t *val)
736{
737
738 *val = pci_read_config(sc->dev, reg, 4);
739}
740
741static inline void
742t4_os_pci_write_cfg4(struct adapter *sc, int reg, uint32_t val)
743{
744
745 pci_write_config(sc->dev, reg, val, 4);
746}
747
748static inline struct port_info *
749adap2pinfo(struct adapter *sc, int idx)
750{
751
752 return (sc->port[idx]);
753}
754
755static inline void
756t4_os_set_hw_addr(struct adapter *sc, int idx, uint8_t hw_addr[])
757{
758
759 bcopy(hw_addr, sc->port[idx]->hw_addr, ETHER_ADDR_LEN);
760}
761
762static inline bool
763is_10G_port(const struct port_info *pi)
764{
765
766 return ((pi->link_cfg.supported & FW_PORT_CAP_SPEED_10G) != 0);
767}
768
769static inline bool
770is_40G_port(const struct port_info *pi)
771{
772
773 return ((pi->link_cfg.supported & FW_PORT_CAP_SPEED_40G) != 0);
774}
775
776static inline int
777tx_resume_threshold(struct sge_eq *eq)
778{
779
780 return (eq->qsize / 4);
781}
782
783/* t4_main.c */
784void t4_tx_task(void *, int);
785void t4_tx_callout(void *);
786int t4_os_find_pci_capability(struct adapter *, int);
787int t4_os_pci_save_state(struct adapter *);
788int t4_os_pci_restore_state(struct adapter *);
789void t4_os_portmod_changed(const struct adapter *, int);
790void t4_os_link_changed(struct adapter *, int, int, int);
791void t4_iterate(void (*)(struct adapter *, void *), void *);
792int t4_register_cpl_handler(struct adapter *, int, cpl_handler_t);
793int t4_register_an_handler(struct adapter *, an_handler_t);
794int t4_register_fw_msg_handler(struct adapter *, int, fw_msg_handler_t);
795int t4_filter_rpl(struct sge_iq *, const struct rss_header *, struct mbuf *);
796int begin_synchronized_op(struct adapter *, struct port_info *, int, char *);
797void end_synchronized_op(struct adapter *, int);
798
799/* t4_sge.c */
800void t4_sge_modload(void);
801void t4_init_sge_cpl_handlers(struct adapter *);
802void t4_tweak_chip_settings(struct adapter *);
803int t4_read_chip_settings(struct adapter *);
804int t4_create_dma_tag(struct adapter *);
805void t4_sge_sysctls(struct adapter *, struct sysctl_ctx_list *,
806 struct sysctl_oid_list *);
807int t4_destroy_dma_tag(struct adapter *);
808int t4_setup_adapter_queues(struct adapter *);
809int t4_teardown_adapter_queues(struct adapter *);
810int t4_setup_port_queues(struct port_info *);
811int t4_teardown_port_queues(struct port_info *);
812int t4_alloc_tx_maps(struct tx_maps *, bus_dma_tag_t, int, int);
813void t4_free_tx_maps(struct tx_maps *, bus_dma_tag_t);
814void t4_intr_all(void *);
815void t4_intr(void *);
816void t4_intr_err(void *);
817void t4_intr_evt(void *);
818void t4_wrq_tx_locked(struct adapter *, struct sge_wrq *, struct wrqe *);
819int t4_eth_tx(struct ifnet *, struct sge_txq *, struct mbuf *);
820void t4_update_fl_bufsize(struct ifnet *);
821int can_resume_tx(struct sge_eq *);
822
823/* t4_tracer.c */
824struct t4_tracer;
825void t4_tracer_modload(void);
826void t4_tracer_modunload(void);
827void t4_tracer_port_detach(struct adapter *);
828int t4_get_tracer(struct adapter *, struct t4_tracer *);
829int t4_set_tracer(struct adapter *, struct t4_tracer *);
830int t4_trace_pkt(struct sge_iq *, const struct rss_header *, struct mbuf *);
831int t5_trace_pkt(struct sge_iq *, const struct rss_header *, struct mbuf *);
832
833static inline struct wrqe *
834alloc_wrqe(int wr_len, struct sge_wrq *wrq)
835{
836 int len = offsetof(struct wrqe, wr) + wr_len;
837 struct wrqe *wr;
838
839 wr = malloc(len, M_CXGBE, M_NOWAIT);
840 if (__predict_false(wr == NULL))
841 return (NULL);
842 wr->wr_len = wr_len;
843 wr->wrq = wrq;
844 return (wr);
845}
846
847static inline void *
848wrtod(struct wrqe *wr)
849{
850 return (&wr->wr[0]);
851}
852
853static inline void
854free_wrqe(struct wrqe *wr)
855{
856 free(wr, M_CXGBE);
857}
858
859static inline void
860t4_wrq_tx(struct adapter *sc, struct wrqe *wr)
861{
862 struct sge_wrq *wrq = wr->wrq;
863
864 TXQ_LOCK(wrq);
865 t4_wrq_tx_locked(sc, wrq, wr);
866 TXQ_UNLOCK(wrq);
867}
868
869#endif
2 * Copyright (c) 2011 Chelsio Communications, Inc.
3 * All rights reserved.
4 * Written by: Navdeep Parhar <np@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: head/sys/dev/cxgbe/adapter.h 255005 2013-08-28 20:45:45Z np $
28 *
29 */
30
31#ifndef __T4_ADAPTER_H__
32#define __T4_ADAPTER_H__
33
34#include <sys/kernel.h>
35#include <sys/bus.h>
36#include <sys/rman.h>
37#include <sys/types.h>
38#include <sys/malloc.h>
39#include <dev/pci/pcivar.h>
40#include <dev/pci/pcireg.h>
41#include <machine/bus.h>
42#include <sys/socket.h>
43#include <sys/sysctl.h>
44#include <net/ethernet.h>
45#include <net/if.h>
46#include <net/if_media.h>
47#include <netinet/in.h>
48#include <netinet/tcp_lro.h>
49
50#include "offload.h"
51#include "firmware/t4fw_interface.h"
52
53MALLOC_DECLARE(M_CXGBE);
54#define CXGBE_UNIMPLEMENTED(s) \
55 panic("%s (%s, line %d) not implemented yet.", s, __FILE__, __LINE__)
56
57#if defined(__i386__) || defined(__amd64__)
58static __inline void
59prefetch(void *x)
60{
61 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
62}
63#else
64#define prefetch(x)
65#endif
66
67#ifndef SYSCTL_ADD_UQUAD
68#define SYSCTL_ADD_UQUAD SYSCTL_ADD_QUAD
69#define sysctl_handle_64 sysctl_handle_quad
70#define CTLTYPE_U64 CTLTYPE_QUAD
71#endif
72
73#if (__FreeBSD_version >= 900030) || \
74 ((__FreeBSD_version >= 802507) && (__FreeBSD_version < 900000))
75#define SBUF_DRAIN 1
76#endif
77
78#ifdef __amd64__
79/* XXX: need systemwide bus_space_read_8/bus_space_write_8 */
80static __inline uint64_t
81t4_bus_space_read_8(bus_space_tag_t tag, bus_space_handle_t handle,
82 bus_size_t offset)
83{
84 KASSERT(tag == X86_BUS_SPACE_MEM,
85 ("%s: can only handle mem space", __func__));
86
87 return (*(volatile uint64_t *)(handle + offset));
88}
89
90static __inline void
91t4_bus_space_write_8(bus_space_tag_t tag, bus_space_handle_t bsh,
92 bus_size_t offset, uint64_t value)
93{
94 KASSERT(tag == X86_BUS_SPACE_MEM,
95 ("%s: can only handle mem space", __func__));
96
97 *(volatile uint64_t *)(bsh + offset) = value;
98}
99#else
100static __inline uint64_t
101t4_bus_space_read_8(bus_space_tag_t tag, bus_space_handle_t handle,
102 bus_size_t offset)
103{
104 return (uint64_t)bus_space_read_4(tag, handle, offset) +
105 ((uint64_t)bus_space_read_4(tag, handle, offset + 4) << 32);
106}
107
108static __inline void
109t4_bus_space_write_8(bus_space_tag_t tag, bus_space_handle_t bsh,
110 bus_size_t offset, uint64_t value)
111{
112 bus_space_write_4(tag, bsh, offset, value);
113 bus_space_write_4(tag, bsh, offset + 4, value >> 32);
114}
115#endif
116
117struct adapter;
118typedef struct adapter adapter_t;
119
120enum {
121 FW_IQ_QSIZE = 256,
122 FW_IQ_ESIZE = 64, /* At least 64 mandated by the firmware spec */
123
124 RX_IQ_QSIZE = 1024,
125 RX_IQ_ESIZE = 64, /* At least 64 so CPL_RX_PKT will fit */
126
127 EQ_ESIZE = 64, /* All egress queues use this entry size */
128
129 RX_FL_ESIZE = EQ_ESIZE, /* 8 64bit addresses */
130#if MJUMPAGESIZE != MCLBYTES
131 FL_BUF_SIZES = 4, /* cluster, jumbop, jumbo9k, jumbo16k */
132#else
133 FL_BUF_SIZES = 3, /* cluster, jumbo9k, jumbo16k */
134#endif
135
136 CTRL_EQ_QSIZE = 128,
137
138 TX_EQ_QSIZE = 1024,
139 TX_SGL_SEGS = 36,
140 TX_WR_FLITS = SGE_MAX_WR_LEN / 8
141};
142
143enum {
144 /* adapter intr_type */
145 INTR_INTX = (1 << 0),
146 INTR_MSI = (1 << 1),
147 INTR_MSIX = (1 << 2)
148};
149
150enum {
151 /* flags understood by begin_synchronized_op */
152 HOLD_LOCK = (1 << 0),
153 SLEEP_OK = (1 << 1),
154 INTR_OK = (1 << 2),
155
156 /* flags understood by end_synchronized_op */
157 LOCK_HELD = HOLD_LOCK,
158};
159
160enum {
161 /* adapter flags */
162 FULL_INIT_DONE = (1 << 0),
163 FW_OK = (1 << 1),
164 INTR_DIRECT = (1 << 2), /* direct interrupts for everything */
165 MASTER_PF = (1 << 3),
166 ADAP_SYSCTL_CTX = (1 << 4),
167 TOM_INIT_DONE = (1 << 5),
168
169 CXGBE_BUSY = (1 << 9),
170
171 /* port flags */
172 DOOMED = (1 << 0),
173 PORT_INIT_DONE = (1 << 1),
174 PORT_SYSCTL_CTX = (1 << 2),
175 HAS_TRACEQ = (1 << 3),
176};
177
178#define IS_DOOMED(pi) ((pi)->flags & DOOMED)
179#define SET_DOOMED(pi) do {(pi)->flags |= DOOMED;} while (0)
180#define IS_BUSY(sc) ((sc)->flags & CXGBE_BUSY)
181#define SET_BUSY(sc) do {(sc)->flags |= CXGBE_BUSY;} while (0)
182#define CLR_BUSY(sc) do {(sc)->flags &= ~CXGBE_BUSY;} while (0)
183
184struct port_info {
185 device_t dev;
186 struct adapter *adapter;
187
188 struct ifnet *ifp;
189 struct ifmedia media;
190
191 struct mtx pi_lock;
192 char lockname[16];
193 unsigned long flags;
194 int if_flags;
195
196 uint16_t viid;
197 int16_t xact_addr_filt;/* index of exact MAC address filter */
198 uint16_t rss_size; /* size of VI's RSS table slice */
199 uint8_t lport; /* associated offload logical port */
200 int8_t mdio_addr;
201 uint8_t port_type;
202 uint8_t mod_type;
203 uint8_t port_id;
204 uint8_t tx_chan;
205
206 /* These need to be int as they are used in sysctl */
207 int ntxq; /* # of tx queues */
208 int first_txq; /* index of first tx queue */
209 int nrxq; /* # of rx queues */
210 int first_rxq; /* index of first rx queue */
211#ifdef TCP_OFFLOAD
212 int nofldtxq; /* # of offload tx queues */
213 int first_ofld_txq; /* index of first offload tx queue */
214 int nofldrxq; /* # of offload rx queues */
215 int first_ofld_rxq; /* index of first offload rx queue */
216#endif
217 int tmr_idx;
218 int pktc_idx;
219 int qsize_rxq;
220 int qsize_txq;
221
222 int linkdnrc;
223 struct link_config link_cfg;
224 struct port_stats stats;
225
226 eventhandler_tag vlan_c;
227
228 struct callout tick;
229 struct sysctl_ctx_list ctx; /* from ifconfig up to driver detach */
230
231 uint8_t hw_addr[ETHER_ADDR_LEN]; /* factory MAC address, won't change */
232};
233
234struct fl_sdesc {
235 struct mbuf *m;
236 bus_dmamap_t map;
237 caddr_t cl;
238 uint8_t tag_idx; /* the sc->fl_tag this map comes from */
239#ifdef INVARIANTS
240 __be64 ba_tag;
241#endif
242};
243
244struct tx_desc {
245 __be64 flit[8];
246};
247
248struct tx_map {
249 struct mbuf *m;
250 bus_dmamap_t map;
251};
252
253/* DMA maps used for tx */
254struct tx_maps {
255 struct tx_map *maps;
256 uint32_t map_total; /* # of DMA maps */
257 uint32_t map_pidx; /* next map to be used */
258 uint32_t map_cidx; /* reclaimed up to this index */
259 uint32_t map_avail; /* # of available maps */
260};
261
262struct tx_sdesc {
263 uint8_t desc_used; /* # of hardware descriptors used by the WR */
264 uint8_t credits; /* NIC txq: # of frames sent out in the WR */
265};
266
267enum {
268 /* iq flags */
269 IQ_ALLOCATED = (1 << 0), /* firmware resources allocated */
270 IQ_HAS_FL = (1 << 1), /* iq associated with a freelist */
271 IQ_INTR = (1 << 2), /* iq takes direct interrupt */
272 IQ_LRO_ENABLED = (1 << 3), /* iq is an eth rxq with LRO enabled */
273
274 /* iq state */
275 IQS_DISABLED = 0,
276 IQS_BUSY = 1,
277 IQS_IDLE = 2,
278};
279
280/*
281 * Ingress Queue: T4 is producer, driver is consumer.
282 */
283struct sge_iq {
284 bus_dma_tag_t desc_tag;
285 bus_dmamap_t desc_map;
286 bus_addr_t ba; /* bus address of descriptor ring */
287 uint32_t flags;
288 uint16_t abs_id; /* absolute SGE id for the iq */
289 int8_t intr_pktc_idx; /* packet count threshold index */
290 int8_t pad0;
291 __be64 *desc; /* KVA of descriptor ring */
292
293 volatile int state;
294 struct adapter *adapter;
295 const __be64 *cdesc; /* current descriptor */
296 uint8_t gen; /* generation bit */
297 uint8_t intr_params; /* interrupt holdoff parameters */
298 uint8_t intr_next; /* XXX: holdoff for next interrupt */
299 uint8_t esize; /* size (bytes) of each entry in the queue */
300 uint16_t qsize; /* size (# of entries) of the queue */
301 uint16_t cidx; /* consumer index */
302 uint16_t cntxt_id; /* SGE context id for the iq */
303
304 STAILQ_ENTRY(sge_iq) link;
305};
306
307enum {
308 EQ_CTRL = 1,
309 EQ_ETH = 2,
310#ifdef TCP_OFFLOAD
311 EQ_OFLD = 3,
312#endif
313
314 /* eq flags */
315 EQ_TYPEMASK = 7, /* 3 lsbits hold the type */
316 EQ_ALLOCATED = (1 << 3), /* firmware resources allocated */
317 EQ_DOOMED = (1 << 4), /* about to be destroyed */
318 EQ_CRFLUSHED = (1 << 5), /* expecting an update from SGE */
319 EQ_STALLED = (1 << 6), /* out of hw descriptors or dmamaps */
320};
321
322/* Listed in order of preference. Update t4_sysctls too if you change these */
323enum {DOORBELL_UDB, DOORBELL_WCWR, DOORBELL_UDBWC, DOORBELL_KDB};
324
325/*
326 * Egress Queue: driver is producer, T4 is consumer.
327 *
328 * Note: A free list is an egress queue (driver produces the buffers and T4
329 * consumes them) but it's special enough to have its own struct (see sge_fl).
330 */
331struct sge_eq {
332 unsigned int flags; /* MUST be first */
333 unsigned int cntxt_id; /* SGE context id for the eq */
334 bus_dma_tag_t desc_tag;
335 bus_dmamap_t desc_map;
336 char lockname[16];
337 struct mtx eq_lock;
338
339 struct tx_desc *desc; /* KVA of descriptor ring */
340 bus_addr_t ba; /* bus address of descriptor ring */
341 struct sge_qstat *spg; /* status page, for convenience */
342 int doorbells;
343 volatile uint32_t *udb; /* KVA of doorbell (lies within BAR2) */
344 u_int udb_qid; /* relative qid within the doorbell page */
345 uint16_t cap; /* max # of desc, for convenience */
346 uint16_t avail; /* available descriptors, for convenience */
347 uint16_t qsize; /* size (# of entries) of the queue */
348 uint16_t cidx; /* consumer idx (desc idx) */
349 uint16_t pidx; /* producer idx (desc idx) */
350 uint16_t pending; /* # of descriptors used since last doorbell */
351 uint16_t iqid; /* iq that gets egr_update for the eq */
352 uint8_t tx_chan; /* tx channel used by the eq */
353 struct task tx_task;
354 struct callout tx_callout;
355
356 /* stats */
357
358 uint32_t egr_update; /* # of SGE_EGR_UPDATE notifications for eq */
359 uint32_t unstalled; /* recovered from stall */
360};
361
362enum {
363 FL_STARVING = (1 << 0), /* on the adapter's list of starving fl's */
364 FL_DOOMED = (1 << 1), /* about to be destroyed */
365};
366
367#define FL_RUNNING_LOW(fl) (fl->cap - fl->needed <= fl->lowat)
368#define FL_NOT_RUNNING_LOW(fl) (fl->cap - fl->needed >= 2 * fl->lowat)
369
370struct sge_fl {
371 bus_dma_tag_t desc_tag;
372 bus_dmamap_t desc_map;
373 bus_dma_tag_t tag[FL_BUF_SIZES];
374 uint8_t tag_idx;
375 struct mtx fl_lock;
376 char lockname[16];
377 int flags;
378
379 __be64 *desc; /* KVA of descriptor ring, ptr to addresses */
380 bus_addr_t ba; /* bus address of descriptor ring */
381 struct fl_sdesc *sdesc; /* KVA of software descriptor ring */
382 uint32_t cap; /* max # of buffers, for convenience */
383 uint16_t qsize; /* size (# of entries) of the queue */
384 uint16_t cntxt_id; /* SGE context id for the freelist */
385 uint32_t cidx; /* consumer idx (buffer idx, NOT hw desc idx) */
386 uint32_t pidx; /* producer idx (buffer idx, NOT hw desc idx) */
387 uint32_t needed; /* # of buffers needed to fill up fl. */
388 uint32_t lowat; /* # of buffers <= this means fl needs help */
389 uint32_t pending; /* # of bufs allocated since last doorbell */
390 unsigned int dmamap_failed;
391 TAILQ_ENTRY(sge_fl) link; /* All starving freelists */
392};
393
394/* txq: SGE egress queue + what's needed for Ethernet NIC */
395struct sge_txq {
396 struct sge_eq eq; /* MUST be first */
397
398 struct ifnet *ifp; /* the interface this txq belongs to */
399 bus_dma_tag_t tx_tag; /* tag for transmit buffers */
400 struct buf_ring *br; /* tx buffer ring */
401 struct tx_sdesc *sdesc; /* KVA of software descriptor ring */
402 struct mbuf *m; /* held up due to temporary resource shortage */
403
404 struct tx_maps txmaps;
405
406 /* stats for common events first */
407
408 uint64_t txcsum; /* # of times hardware assisted with checksum */
409 uint64_t tso_wrs; /* # of TSO work requests */
410 uint64_t vlan_insertion;/* # of times VLAN tag was inserted */
411 uint64_t imm_wrs; /* # of work requests with immediate data */
412 uint64_t sgl_wrs; /* # of work requests with direct SGL */
413 uint64_t txpkt_wrs; /* # of txpkt work requests (not coalesced) */
414 uint64_t txpkts_wrs; /* # of coalesced tx work requests */
415 uint64_t txpkts_pkts; /* # of frames in coalesced tx work requests */
416
417 /* stats for not-that-common events */
418
419 uint32_t no_dmamap; /* no DMA map to load the mbuf */
420 uint32_t no_desc; /* out of hardware descriptors */
421} __aligned(CACHE_LINE_SIZE);
422
423/* rxq: SGE ingress queue + SGE free list + miscellaneous items */
424struct sge_rxq {
425 struct sge_iq iq; /* MUST be first */
426 struct sge_fl fl; /* MUST follow iq */
427
428 struct ifnet *ifp; /* the interface this rxq belongs to */
429#if defined(INET) || defined(INET6)
430 struct lro_ctrl lro; /* LRO state */
431#endif
432
433 /* stats for common events first */
434
435 uint64_t rxcsum; /* # of times hardware assisted with checksum */
436 uint64_t vlan_extraction;/* # of times VLAN tag was extracted */
437
438 /* stats for not-that-common events */
439
440} __aligned(CACHE_LINE_SIZE);
441
442static inline struct sge_rxq *
443iq_to_rxq(struct sge_iq *iq)
444{
445
446 return (__containerof(iq, struct sge_rxq, iq));
447}
448
449
450#ifdef TCP_OFFLOAD
451/* ofld_rxq: SGE ingress queue + SGE free list + miscellaneous items */
452struct sge_ofld_rxq {
453 struct sge_iq iq; /* MUST be first */
454 struct sge_fl fl; /* MUST follow iq */
455} __aligned(CACHE_LINE_SIZE);
456
457static inline struct sge_ofld_rxq *
458iq_to_ofld_rxq(struct sge_iq *iq)
459{
460
461 return (__containerof(iq, struct sge_ofld_rxq, iq));
462}
463#endif
464
465struct wrqe {
466 STAILQ_ENTRY(wrqe) link;
467 struct sge_wrq *wrq;
468 int wr_len;
469 uint64_t wr[] __aligned(16);
470};
471
472/*
473 * wrq: SGE egress queue that is given prebuilt work requests. Both the control
474 * and offload tx queues are of this type.
475 */
476struct sge_wrq {
477 struct sge_eq eq; /* MUST be first */
478
479 struct adapter *adapter;
480
481 /* List of WRs held up due to lack of tx descriptors */
482 STAILQ_HEAD(, wrqe) wr_list;
483
484 /* stats for common events first */
485
486 uint64_t tx_wrs; /* # of tx work requests */
487
488 /* stats for not-that-common events */
489
490 uint32_t no_desc; /* out of hardware descriptors */
491} __aligned(CACHE_LINE_SIZE);
492
493struct sge {
494 int timer_val[SGE_NTIMERS];
495 int counter_val[SGE_NCOUNTERS];
496 int fl_starve_threshold;
497 int s_qpp;
498
499 int nrxq; /* total # of Ethernet rx queues */
500 int ntxq; /* total # of Ethernet tx tx queues */
501#ifdef TCP_OFFLOAD
502 int nofldrxq; /* total # of TOE rx queues */
503 int nofldtxq; /* total # of TOE tx queues */
504#endif
505 int niq; /* total # of ingress queues */
506 int neq; /* total # of egress queues */
507
508 struct sge_iq fwq; /* Firmware event queue */
509 struct sge_wrq mgmtq; /* Management queue (control queue) */
510 struct sge_wrq *ctrlq; /* Control queues */
511 struct sge_txq *txq; /* NIC tx queues */
512 struct sge_rxq *rxq; /* NIC rx queues */
513#ifdef TCP_OFFLOAD
514 struct sge_wrq *ofld_txq; /* TOE tx queues */
515 struct sge_ofld_rxq *ofld_rxq; /* TOE rx queues */
516#endif
517
518 uint16_t iq_start;
519 int eq_start;
520 struct sge_iq **iqmap; /* iq->cntxt_id to iq mapping */
521 struct sge_eq **eqmap; /* eq->cntxt_id to eq mapping */
522};
523
524struct rss_header;
525typedef int (*cpl_handler_t)(struct sge_iq *, const struct rss_header *,
526 struct mbuf *);
527typedef int (*an_handler_t)(struct sge_iq *, const struct rsp_ctrl *);
528typedef int (*fw_msg_handler_t)(struct adapter *, const __be64 *);
529
530struct adapter {
531 SLIST_ENTRY(adapter) link;
532 device_t dev;
533 struct cdev *cdev;
534
535 /* PCIe register resources */
536 int regs_rid;
537 struct resource *regs_res;
538 int msix_rid;
539 struct resource *msix_res;
540 bus_space_handle_t bh;
541 bus_space_tag_t bt;
542 bus_size_t mmio_len;
543 int udbs_rid;
544 struct resource *udbs_res;
545 volatile uint8_t *udbs_base;
546
547 unsigned int pf;
548 unsigned int mbox;
549
550 /* Interrupt information */
551 int intr_type;
552 int intr_count;
553 struct irq {
554 struct resource *res;
555 int rid;
556 void *tag;
557 } *irq;
558
559 bus_dma_tag_t dmat; /* Parent DMA tag */
560
561 struct sge sge;
562
563 struct taskqueue *tq[NCHAN]; /* taskqueues that flush data out */
564 struct port_info *port[MAX_NPORTS];
565 uint8_t chan_map[NCHAN];
566
567#ifdef TCP_OFFLOAD
568 void *tom_softc; /* (struct tom_data *) */
569 struct tom_tunables tt;
570 void *iwarp_softc; /* (struct c4iw_dev *) */
571#endif
572 struct l2t_data *l2t; /* L2 table */
573 struct tid_info tids;
574
575 int doorbells;
576 int open_device_map;
577#ifdef TCP_OFFLOAD
578 int offload_map;
579#endif
580 int flags;
581
582 char ifp_lockname[16];
583 struct mtx ifp_lock;
584 struct ifnet *ifp; /* tracer ifp */
585 struct ifmedia media;
586 int traceq; /* iq used by all tracers, -1 if none */
587 int tracer_valid; /* bitmap of valid tracers */
588 int tracer_enabled; /* bitmap of enabled tracers */
589
590 char fw_version[32];
591 char cfg_file[32];
592 u_int cfcsum;
593 struct adapter_params params;
594 struct t4_virt_res vres;
595
596 uint16_t linkcaps;
597 uint16_t niccaps;
598 uint16_t toecaps;
599 uint16_t rdmacaps;
600 uint16_t iscsicaps;
601 uint16_t fcoecaps;
602
603 struct sysctl_ctx_list ctx; /* from adapter_full_init to full_uninit */
604
605 struct mtx sc_lock;
606 char lockname[16];
607
608 /* Starving free lists */
609 struct mtx sfl_lock; /* same cache-line as sc_lock? but that's ok */
610 TAILQ_HEAD(, sge_fl) sfl;
611 struct callout sfl_callout;
612
613 an_handler_t an_handler __aligned(CACHE_LINE_SIZE);
614 fw_msg_handler_t fw_msg_handler[5]; /* NUM_FW6_TYPES */
615 cpl_handler_t cpl_handler[0xef]; /* NUM_CPL_CMDS */
616
617#ifdef INVARIANTS
618 const char *last_op;
619 const void *last_op_thr;
620#endif
621};
622
623#define ADAPTER_LOCK(sc) mtx_lock(&(sc)->sc_lock)
624#define ADAPTER_UNLOCK(sc) mtx_unlock(&(sc)->sc_lock)
625#define ADAPTER_LOCK_ASSERT_OWNED(sc) mtx_assert(&(sc)->sc_lock, MA_OWNED)
626#define ADAPTER_LOCK_ASSERT_NOTOWNED(sc) mtx_assert(&(sc)->sc_lock, MA_NOTOWNED)
627
628/* XXX: not bulletproof, but much better than nothing */
629#define ASSERT_SYNCHRONIZED_OP(sc) \
630 KASSERT(IS_BUSY(sc) && \
631 (mtx_owned(&(sc)->sc_lock) || sc->last_op_thr == curthread), \
632 ("%s: operation not synchronized.", __func__))
633
634#define PORT_LOCK(pi) mtx_lock(&(pi)->pi_lock)
635#define PORT_UNLOCK(pi) mtx_unlock(&(pi)->pi_lock)
636#define PORT_LOCK_ASSERT_OWNED(pi) mtx_assert(&(pi)->pi_lock, MA_OWNED)
637#define PORT_LOCK_ASSERT_NOTOWNED(pi) mtx_assert(&(pi)->pi_lock, MA_NOTOWNED)
638
639#define FL_LOCK(fl) mtx_lock(&(fl)->fl_lock)
640#define FL_TRYLOCK(fl) mtx_trylock(&(fl)->fl_lock)
641#define FL_UNLOCK(fl) mtx_unlock(&(fl)->fl_lock)
642#define FL_LOCK_ASSERT_OWNED(fl) mtx_assert(&(fl)->fl_lock, MA_OWNED)
643#define FL_LOCK_ASSERT_NOTOWNED(fl) mtx_assert(&(fl)->fl_lock, MA_NOTOWNED)
644
645#define RXQ_FL_LOCK(rxq) FL_LOCK(&(rxq)->fl)
646#define RXQ_FL_UNLOCK(rxq) FL_UNLOCK(&(rxq)->fl)
647#define RXQ_FL_LOCK_ASSERT_OWNED(rxq) FL_LOCK_ASSERT_OWNED(&(rxq)->fl)
648#define RXQ_FL_LOCK_ASSERT_NOTOWNED(rxq) FL_LOCK_ASSERT_NOTOWNED(&(rxq)->fl)
649
650#define EQ_LOCK(eq) mtx_lock(&(eq)->eq_lock)
651#define EQ_TRYLOCK(eq) mtx_trylock(&(eq)->eq_lock)
652#define EQ_UNLOCK(eq) mtx_unlock(&(eq)->eq_lock)
653#define EQ_LOCK_ASSERT_OWNED(eq) mtx_assert(&(eq)->eq_lock, MA_OWNED)
654#define EQ_LOCK_ASSERT_NOTOWNED(eq) mtx_assert(&(eq)->eq_lock, MA_NOTOWNED)
655
656#define TXQ_LOCK(txq) EQ_LOCK(&(txq)->eq)
657#define TXQ_TRYLOCK(txq) EQ_TRYLOCK(&(txq)->eq)
658#define TXQ_UNLOCK(txq) EQ_UNLOCK(&(txq)->eq)
659#define TXQ_LOCK_ASSERT_OWNED(txq) EQ_LOCK_ASSERT_OWNED(&(txq)->eq)
660#define TXQ_LOCK_ASSERT_NOTOWNED(txq) EQ_LOCK_ASSERT_NOTOWNED(&(txq)->eq)
661
662#define for_each_txq(pi, iter, q) \
663 for (q = &pi->adapter->sge.txq[pi->first_txq], iter = 0; \
664 iter < pi->ntxq; ++iter, ++q)
665#define for_each_rxq(pi, iter, q) \
666 for (q = &pi->adapter->sge.rxq[pi->first_rxq], iter = 0; \
667 iter < pi->nrxq; ++iter, ++q)
668#define for_each_ofld_txq(pi, iter, q) \
669 for (q = &pi->adapter->sge.ofld_txq[pi->first_ofld_txq], iter = 0; \
670 iter < pi->nofldtxq; ++iter, ++q)
671#define for_each_ofld_rxq(pi, iter, q) \
672 for (q = &pi->adapter->sge.ofld_rxq[pi->first_ofld_rxq], iter = 0; \
673 iter < pi->nofldrxq; ++iter, ++q)
674
675/* One for errors, one for firmware events */
676#define T4_EXTRA_INTR 2
677
678static inline uint32_t
679t4_read_reg(struct adapter *sc, uint32_t reg)
680{
681
682 return bus_space_read_4(sc->bt, sc->bh, reg);
683}
684
685static inline void
686t4_write_reg(struct adapter *sc, uint32_t reg, uint32_t val)
687{
688
689 bus_space_write_4(sc->bt, sc->bh, reg, val);
690}
691
692static inline uint64_t
693t4_read_reg64(struct adapter *sc, uint32_t reg)
694{
695
696 return t4_bus_space_read_8(sc->bt, sc->bh, reg);
697}
698
699static inline void
700t4_write_reg64(struct adapter *sc, uint32_t reg, uint64_t val)
701{
702
703 t4_bus_space_write_8(sc->bt, sc->bh, reg, val);
704}
705
706static inline void
707t4_os_pci_read_cfg1(struct adapter *sc, int reg, uint8_t *val)
708{
709
710 *val = pci_read_config(sc->dev, reg, 1);
711}
712
713static inline void
714t4_os_pci_write_cfg1(struct adapter *sc, int reg, uint8_t val)
715{
716
717 pci_write_config(sc->dev, reg, val, 1);
718}
719
720static inline void
721t4_os_pci_read_cfg2(struct adapter *sc, int reg, uint16_t *val)
722{
723
724 *val = pci_read_config(sc->dev, reg, 2);
725}
726
727static inline void
728t4_os_pci_write_cfg2(struct adapter *sc, int reg, uint16_t val)
729{
730
731 pci_write_config(sc->dev, reg, val, 2);
732}
733
734static inline void
735t4_os_pci_read_cfg4(struct adapter *sc, int reg, uint32_t *val)
736{
737
738 *val = pci_read_config(sc->dev, reg, 4);
739}
740
741static inline void
742t4_os_pci_write_cfg4(struct adapter *sc, int reg, uint32_t val)
743{
744
745 pci_write_config(sc->dev, reg, val, 4);
746}
747
748static inline struct port_info *
749adap2pinfo(struct adapter *sc, int idx)
750{
751
752 return (sc->port[idx]);
753}
754
755static inline void
756t4_os_set_hw_addr(struct adapter *sc, int idx, uint8_t hw_addr[])
757{
758
759 bcopy(hw_addr, sc->port[idx]->hw_addr, ETHER_ADDR_LEN);
760}
761
762static inline bool
763is_10G_port(const struct port_info *pi)
764{
765
766 return ((pi->link_cfg.supported & FW_PORT_CAP_SPEED_10G) != 0);
767}
768
769static inline bool
770is_40G_port(const struct port_info *pi)
771{
772
773 return ((pi->link_cfg.supported & FW_PORT_CAP_SPEED_40G) != 0);
774}
775
776static inline int
777tx_resume_threshold(struct sge_eq *eq)
778{
779
780 return (eq->qsize / 4);
781}
782
783/* t4_main.c */
784void t4_tx_task(void *, int);
785void t4_tx_callout(void *);
786int t4_os_find_pci_capability(struct adapter *, int);
787int t4_os_pci_save_state(struct adapter *);
788int t4_os_pci_restore_state(struct adapter *);
789void t4_os_portmod_changed(const struct adapter *, int);
790void t4_os_link_changed(struct adapter *, int, int, int);
791void t4_iterate(void (*)(struct adapter *, void *), void *);
792int t4_register_cpl_handler(struct adapter *, int, cpl_handler_t);
793int t4_register_an_handler(struct adapter *, an_handler_t);
794int t4_register_fw_msg_handler(struct adapter *, int, fw_msg_handler_t);
795int t4_filter_rpl(struct sge_iq *, const struct rss_header *, struct mbuf *);
796int begin_synchronized_op(struct adapter *, struct port_info *, int, char *);
797void end_synchronized_op(struct adapter *, int);
798
799/* t4_sge.c */
800void t4_sge_modload(void);
801void t4_init_sge_cpl_handlers(struct adapter *);
802void t4_tweak_chip_settings(struct adapter *);
803int t4_read_chip_settings(struct adapter *);
804int t4_create_dma_tag(struct adapter *);
805void t4_sge_sysctls(struct adapter *, struct sysctl_ctx_list *,
806 struct sysctl_oid_list *);
807int t4_destroy_dma_tag(struct adapter *);
808int t4_setup_adapter_queues(struct adapter *);
809int t4_teardown_adapter_queues(struct adapter *);
810int t4_setup_port_queues(struct port_info *);
811int t4_teardown_port_queues(struct port_info *);
812int t4_alloc_tx_maps(struct tx_maps *, bus_dma_tag_t, int, int);
813void t4_free_tx_maps(struct tx_maps *, bus_dma_tag_t);
814void t4_intr_all(void *);
815void t4_intr(void *);
816void t4_intr_err(void *);
817void t4_intr_evt(void *);
818void t4_wrq_tx_locked(struct adapter *, struct sge_wrq *, struct wrqe *);
819int t4_eth_tx(struct ifnet *, struct sge_txq *, struct mbuf *);
820void t4_update_fl_bufsize(struct ifnet *);
821int can_resume_tx(struct sge_eq *);
822
823/* t4_tracer.c */
824struct t4_tracer;
825void t4_tracer_modload(void);
826void t4_tracer_modunload(void);
827void t4_tracer_port_detach(struct adapter *);
828int t4_get_tracer(struct adapter *, struct t4_tracer *);
829int t4_set_tracer(struct adapter *, struct t4_tracer *);
830int t4_trace_pkt(struct sge_iq *, const struct rss_header *, struct mbuf *);
831int t5_trace_pkt(struct sge_iq *, const struct rss_header *, struct mbuf *);
832
833static inline struct wrqe *
834alloc_wrqe(int wr_len, struct sge_wrq *wrq)
835{
836 int len = offsetof(struct wrqe, wr) + wr_len;
837 struct wrqe *wr;
838
839 wr = malloc(len, M_CXGBE, M_NOWAIT);
840 if (__predict_false(wr == NULL))
841 return (NULL);
842 wr->wr_len = wr_len;
843 wr->wrq = wrq;
844 return (wr);
845}
846
847static inline void *
848wrtod(struct wrqe *wr)
849{
850 return (&wr->wr[0]);
851}
852
853static inline void
854free_wrqe(struct wrqe *wr)
855{
856 free(wr, M_CXGBE);
857}
858
859static inline void
860t4_wrq_tx(struct adapter *sc, struct wrqe *wr)
861{
862 struct sge_wrq *wrq = wr->wrq;
863
864 TXQ_LOCK(wrq);
865 t4_wrq_tx_locked(sc, wrq, wr);
866 TXQ_UNLOCK(wrq);
867}
868
869#endif