verbs.h 11.6 KB
Newer Older
1
/*
2
 * Copyright(c) 2015 - 2018 Intel Corporation.
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * BSD LICENSE
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  - Neither the name of Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef HFI1_VERBS_H
#define HFI1_VERBS_H

#include <linux/types.h>
#include <linux/seqlock.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/kref.h>
#include <linux/workqueue.h>
#include <linux/kthread.h>
#include <linux/completion.h>
59
#include <linux/slab.h>
60 61 62
#include <rdma/ib_pack.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_mad.h>
63
#include <rdma/ib_hdrs.h>
64
#include <rdma/rdma_vt.h>
65
#include <rdma/rdmavt_qp.h>
66
#include <rdma/rdmavt_cq.h>
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97

struct hfi1_ctxtdata;
struct hfi1_pportdata;
struct hfi1_devdata;
struct hfi1_packet;

#include "iowait.h"

#define HFI1_MAX_RDMA_ATOMIC     16

/*
 * Increment this value if any changes that break userspace ABI
 * compatibility are made.
 */
#define HFI1_UVERBS_ABI_VERSION       2

/* IB Performance Manager status values */
#define IB_PMA_SAMPLE_STATUS_DONE       0x00
#define IB_PMA_SAMPLE_STATUS_STARTED    0x01
#define IB_PMA_SAMPLE_STATUS_RUNNING    0x02

/* Mandatory IB performance counter select values. */
#define IB_PMA_PORT_XMIT_DATA   cpu_to_be16(0x0001)
#define IB_PMA_PORT_RCV_DATA    cpu_to_be16(0x0002)
#define IB_PMA_PORT_XMIT_PKTS   cpu_to_be16(0x0003)
#define IB_PMA_PORT_RCV_PKTS    cpu_to_be16(0x0004)
#define IB_PMA_PORT_XMIT_WAIT   cpu_to_be16(0x0005)

#define HFI1_VENDOR_IPG		cpu_to_be16(0xFFA0)

#define IB_DEFAULT_GID_PREFIX	cpu_to_be64(0xfe80000000000000ULL)
98
#define OPA_BTH_MIG_REQ		BIT(31)
99

100 101 102
#define RC_OP(x) IB_OPCODE_RC_##x
#define UC_OP(x) IB_OPCODE_UC_##x

103 104 105 106 107
/* flags passed by hfi1_ib_rcv() */
enum {
	HFI1_HAS_GRH = (1 << 0),
};

108 109 110 111 112
#define LRH_16B_BYTES (FIELD_SIZEOF(struct hfi1_16b_header, lrh))
#define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
#define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh))
#define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))

113 114 115 116 117 118
/* 24Bits for qpn, upper 8Bits reserved */
struct opa_16b_mgmt {
	__be32 dest_qpn;
	__be32 src_qpn;
};

119 120 121 122 123 124 125 126
struct hfi1_16b_header {
	u32 lrh[4];
	union {
		struct {
			struct ib_grh grh;
			struct ib_other_headers oth;
		} l;
		struct ib_other_headers oth;
127
		struct opa_16b_mgmt mgmt;
128 129 130
	} u;
} __packed;

131 132 133 134 135 136 137 138
struct hfi1_opa_header {
	union {
		struct ib_header ibh; /* 9B header */
		struct hfi1_16b_header opah; /* 16B header */
	};
	u8 hdr_type; /* 9B or 16B */
} __packed;

139
struct hfi1_ahg_info {
140 141 142 143 144 145
	u32 ahgdesc[2];
	u16 tx_flags;
	u8 ahgcount;
	u8 ahgidx;
};

146
struct hfi1_sdma_header {
147
	__le64 pbc;
148
	struct hfi1_opa_header hdr;
149 150
} __packed;

151 152 153 154 155
/*
 * hfi1 specific data structures that will be hidden from rvt after the queue
 * pair is made common
 */
struct hfi1_qp_priv {
156
	struct hfi1_ahg_info *s_ahg;              /* ahg info for next header */
157 158 159
	struct sdma_engine *s_sde;                /* current sde */
	struct send_context *s_sendcontext;       /* current sendcontext */
	u8 s_sc;		                  /* SC[0..4] for next packet */
160
	struct iowait s_iowait;
161
	struct rvt_qp *owner;
162
	u8 hdr_type; /* 9B or 16B */
163 164
};

165 166 167 168
/*
 * This structure is used to hold commonly lookedup and computed values during
 * the send engine progress.
 */
169
struct iowait_work;
170 171 172 173
struct hfi1_pkt_state {
	struct hfi1_ibdev *dev;
	struct hfi1_ibport *ibp;
	struct hfi1_pportdata *ppd;
174
	struct verbs_txreq *s_txreq;
175
	struct iowait_work *wait;
176
	unsigned long flags;
177 178 179
	unsigned long timeout;
	unsigned long timeout_int;
	int cpu;
180
	u8 opcode;
181
	bool in_thread;
182
	bool pkts_sent;
183 184
};

185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206
#define HFI1_PSN_CREDIT  16

struct hfi1_opcode_stats {
	u64 n_packets;          /* number of packets */
	u64 n_bytes;            /* total number of bytes */
};

struct hfi1_opcode_stats_perctx {
	struct hfi1_opcode_stats stats[256];
};

static inline void inc_opstats(
	u32 tlen,
	struct hfi1_opcode_stats *stats)
{
#ifdef CONFIG_DEBUG_FS
	stats->n_bytes += tlen;
	stats->n_packets++;
#endif
}

struct hfi1_ibport {
207
	struct rvt_qp __rcu *qp[2];
208 209
	struct rvt_ibport rvp;

210 211 212 213 214 215
	/* the first 16 entries are sl_to_vl for !OPA */
	u8 sl_to_sc[32];
	u8 sc_to_sl[32];
};

struct hfi1_ibdev {
216
	struct rvt_dev_info rdi; /* Must be first */
217 218

	/* QP numbers are shared by all IB ports */
219 220
	/* protect txwait list */
	seqlock_t txwait_lock ____cacheline_aligned_in_smp;
221 222 223
	struct list_head txwait;        /* list for wait verbs_txreq */
	struct list_head memwait;       /* list for wait kernel memory */
	struct kmem_cache *verbs_txreq_cache;
224 225
	u64 n_txwait;
	u64 n_kmem_wait;
226

227 228
	/* protect iowait lists */
	seqlock_t iowait_lock ____cacheline_aligned_in_smp;
229
	u64 n_piowait;
230
	u64 n_piodrain;
231
	struct timer_list mem_timer;
232 233 234 235 236 237

#ifdef CONFIG_DEBUG_FS
	/* per HFI debugfs */
	struct dentry *hfi1_ibdev_dbg;
	/* per HFI symlinks to above */
	struct dentry *hfi1_ibdev_link;
238
#ifdef CONFIG_FAULT_INJECTION
239
	struct fault *fault;
240
#endif
241 242 243 244 245
#endif
};

static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
{
246 247 248 249
	struct rvt_dev_info *rdi;

	rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
	return container_of(rdi, struct hfi1_ibdev, rdi);
250 251
}

252
static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
253 254 255 256 257 258 259
{
	struct hfi1_qp_priv *priv;

	priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
	return priv->owner;
}

260 261 262
/*
 * This must be called with s_lock held.
 */
263
void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
Don Hiatt's avatar
Don Hiatt committed
264
		   u32 qp1, u32 qp2, u32 lid1, u32 lid2);
265
void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293
void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
		     const struct ib_wc *in_wc, const struct ib_grh *in_grh,
		     const struct ib_mad_hdr *in_mad, size_t in_mad_size,
		     struct ib_mad_hdr *out_mad, size_t *out_mad_size,
		     u16 *out_mad_pkey_index);

/*
 * The PSN_MASK and PSN_SHIFT allow for
 * 1) comparing two PSNs
 * 2) returning the PSN with any upper bits masked
 * 3) returning the difference between to PSNs
 *
 * The number of significant bits in the PSN must
 * necessarily be at least one bit less than
 * the container holding the PSN.
 */
#define PSN_MASK 0x7FFFFFFF
#define PSN_SHIFT 1
#define PSN_MODIFY_MASK 0xFFFFFF

/*
 * Compare two PSNs
 * Returns an integer <, ==, or > than zero.
 */
static inline int cmp_psn(u32 a, u32 b)
{
294
	return (((int)a) - ((int)b)) << PSN_SHIFT;
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
}

/*
 * Return masked PSN
 */
static inline u32 mask_psn(u32 a)
{
	return a & PSN_MASK;
}

/*
 * Return delta between two PSNs
 */
static inline u32 delta_psn(u32 a, u32 b)
{
	return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
}

struct verbs_txreq;
void hfi1_put_txreq(struct verbs_txreq *tx);

316
int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
317 318 319 320 321 322 323 324 325

void hfi1_cnp_rcv(struct hfi1_packet *packet);

void hfi1_uc_rcv(struct hfi1_packet *packet);

void hfi1_rc_rcv(struct hfi1_packet *packet);

void hfi1_rc_hdrerr(
	struct hfi1_ctxtdata *rcd,
326
	struct hfi1_packet *packet,
327
	struct rvt_qp *qp);
328

329
u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
330

331
void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
332 333 334 335 336

void hfi1_ud_rcv(struct hfi1_packet *packet);

int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);

337
void hfi1_migrate_qp(struct rvt_qp *qp);
338

339 340 341 342 343
int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
			 int attr_mask, struct ib_udata *udata);

void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
		    int attr_mask, struct ib_udata *udata);
344
void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
345 346
int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
		   bool *call_send);
347

348 349 350
extern const u32 rc_only_opcode;
extern const u32 uc_only_opcode;

351
int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
352 353

u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
354
		  const struct ib_global_route *grh, u32 hwords, u32 nwords);
355

356
void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
357 358
			  u32 bth0, u32 bth2, int middle,
			  struct hfi1_pkt_state *ps);
359

360 361
void _hfi1_do_send(struct work_struct *work);

362 363 364
void hfi1_do_send_from_rvt(struct rvt_qp *qp);

void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
365

366
void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
367 368
			enum ib_wc_status status);

369
void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
370

371
int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
372

373
int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
374

375
int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
376 377 378 379 380 381 382

int hfi1_register_ib_device(struct hfi1_devdata *);

void hfi1_unregister_ib_device(struct hfi1_devdata *);

void hfi1_ib_rcv(struct hfi1_packet *packet);

383 384
void hfi1_16B_rcv(struct hfi1_packet *packet);

385 386
unsigned hfi1_get_npkeys(struct hfi1_devdata *);

387
int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
388
			u64 pbc);
389

390
int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
391
			u64 pbc);
392

393 394 395 396 397
static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
{
	return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
}

398 399 400 401
extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];

extern const u8 hdr_len_by_opcode[];

402
extern const int ib_rvt_state_ops[];
403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425

extern __be64 ib_hfi1_sys_image_guid;    /* in network order */

extern unsigned int hfi1_max_cqes;

extern unsigned int hfi1_max_cqs;

extern unsigned int hfi1_max_qp_wrs;

extern unsigned int hfi1_max_qps;

extern unsigned int hfi1_max_sges;

extern unsigned int hfi1_max_mcast_grps;

extern unsigned int hfi1_max_mcast_qp_attached;

extern unsigned int hfi1_max_srqs;

extern unsigned int hfi1_max_srq_sges;

extern unsigned int hfi1_max_srq_wrs;

426 427
extern unsigned short piothreshold;

428 429 430
extern const u32 ib_hfi1_rnr_table[];

#endif                          /* HFI1_VERBS_H */