mthca_cq.c 23.1 KB
Newer Older
L
Linus Torvalds 已提交
1 2
/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
3
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4
 * Copyright (c) 2005 Cisco Systems, Inc. All rights reserved.
5 6
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
L
Linus Torvalds 已提交
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
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * $Id: mthca_cq.c 1369 2004-12-20 16:17:07Z roland $
 */

#include <linux/init.h>
#include <linux/hardirq.h>

42
#include <rdma/ib_pack.h>
L
Linus Torvalds 已提交
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

#include "mthca_dev.h"
#include "mthca_cmd.h"
#include "mthca_memfree.h"

enum {
	MTHCA_MAX_DIRECT_CQ_SIZE = 4 * PAGE_SIZE
};

enum {
	MTHCA_CQ_ENTRY_SIZE = 0x20
};

/*
 * Must be packed because start is 64 bits but only aligned to 32 bits.
 */
struct mthca_cq_context {
60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
	__be32 flags;
	__be64 start;
	__be32 logsize_usrpage;
	__be32 error_eqn;	/* Tavor only */
	__be32 comp_eqn;
	__be32 pd;
	__be32 lkey;
	__be32 last_notified_index;
	__be32 solicit_producer_index;
	__be32 consumer_index;
	__be32 producer_index;
	__be32 cqn;
	__be32 ci_db;		/* Arbel only */
	__be32 state_db;	/* Arbel only */
	u32    reserved;
L
Linus Torvalds 已提交
75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112
} __attribute__((packed));

#define MTHCA_CQ_STATUS_OK          ( 0 << 28)
#define MTHCA_CQ_STATUS_OVERFLOW    ( 9 << 28)
#define MTHCA_CQ_STATUS_WRITE_FAIL  (10 << 28)
#define MTHCA_CQ_FLAG_TR            ( 1 << 18)
#define MTHCA_CQ_FLAG_OI            ( 1 << 17)
#define MTHCA_CQ_STATE_DISARMED     ( 0 <<  8)
#define MTHCA_CQ_STATE_ARMED        ( 1 <<  8)
#define MTHCA_CQ_STATE_ARMED_SOL    ( 4 <<  8)
#define MTHCA_EQ_STATE_FIRED        (10 <<  8)

enum {
	MTHCA_ERROR_CQE_OPCODE_MASK = 0xfe
};

enum {
	SYNDROME_LOCAL_LENGTH_ERR 	 = 0x01,
	SYNDROME_LOCAL_QP_OP_ERR  	 = 0x02,
	SYNDROME_LOCAL_EEC_OP_ERR 	 = 0x03,
	SYNDROME_LOCAL_PROT_ERR   	 = 0x04,
	SYNDROME_WR_FLUSH_ERR     	 = 0x05,
	SYNDROME_MW_BIND_ERR      	 = 0x06,
	SYNDROME_BAD_RESP_ERR     	 = 0x10,
	SYNDROME_LOCAL_ACCESS_ERR 	 = 0x11,
	SYNDROME_REMOTE_INVAL_REQ_ERR 	 = 0x12,
	SYNDROME_REMOTE_ACCESS_ERR 	 = 0x13,
	SYNDROME_REMOTE_OP_ERR     	 = 0x14,
	SYNDROME_RETRY_EXC_ERR 		 = 0x15,
	SYNDROME_RNR_RETRY_EXC_ERR 	 = 0x16,
	SYNDROME_LOCAL_RDD_VIOL_ERR 	 = 0x20,
	SYNDROME_REMOTE_INVAL_RD_REQ_ERR = 0x21,
	SYNDROME_REMOTE_ABORTED_ERR 	 = 0x22,
	SYNDROME_INVAL_EECN_ERR 	 = 0x23,
	SYNDROME_INVAL_EEC_STATE_ERR 	 = 0x24
};

struct mthca_cqe {
113 114 115 116 117 118 119 120 121 122 123 124
	__be32 my_qpn;
	__be32 my_ee;
	__be32 rqpn;
	__be16 sl_g_mlpath;
	__be16 rlid;
	__be32 imm_etype_pkey_eec;
	__be32 byte_cnt;
	__be32 wqe;
	u8     opcode;
	u8     is_send;
	u8     reserved;
	u8     owner;
L
Linus Torvalds 已提交
125 126 127
};

struct mthca_err_cqe {
128 129 130 131 132 133 134 135 136 137
	__be32 my_qpn;
	u32    reserved1[3];
	u8     syndrome;
	u8     reserved2;
	__be16 db_cnt;
	u32    reserved3;
	__be32 wqe;
	u8     opcode;
	u8     reserved4[2];
	u8     owner;
L
Linus Torvalds 已提交
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177
};

#define MTHCA_CQ_ENTRY_OWNER_SW      (0 << 7)
#define MTHCA_CQ_ENTRY_OWNER_HW      (1 << 7)

#define MTHCA_TAVOR_CQ_DB_INC_CI       (1 << 24)
#define MTHCA_TAVOR_CQ_DB_REQ_NOT      (2 << 24)
#define MTHCA_TAVOR_CQ_DB_REQ_NOT_SOL  (3 << 24)
#define MTHCA_TAVOR_CQ_DB_SET_CI       (4 << 24)
#define MTHCA_TAVOR_CQ_DB_REQ_NOT_MULT (5 << 24)

#define MTHCA_ARBEL_CQ_DB_REQ_NOT_SOL  (1 << 24)
#define MTHCA_ARBEL_CQ_DB_REQ_NOT      (2 << 24)
#define MTHCA_ARBEL_CQ_DB_REQ_NOT_MULT (3 << 24)

static inline struct mthca_cqe *get_cqe(struct mthca_cq *cq, int entry)
{
	if (cq->is_direct)
		return cq->queue.direct.buf + (entry * MTHCA_CQ_ENTRY_SIZE);
	else
		return cq->queue.page_list[entry * MTHCA_CQ_ENTRY_SIZE / PAGE_SIZE].buf
			+ (entry * MTHCA_CQ_ENTRY_SIZE) % PAGE_SIZE;
}

static inline struct mthca_cqe *cqe_sw(struct mthca_cq *cq, int i)
{
	struct mthca_cqe *cqe = get_cqe(cq, i);
	return MTHCA_CQ_ENTRY_OWNER_HW & cqe->owner ? NULL : cqe;
}

static inline struct mthca_cqe *next_cqe_sw(struct mthca_cq *cq)
{
	return cqe_sw(cq, cq->cons_index & cq->ibcq.cqe);
}

static inline void set_cqe_hw(struct mthca_cqe *cqe)
{
	cqe->owner = MTHCA_CQ_ENTRY_OWNER_HW;
}

178 179 180 181 182 183 184 185 186 187 188
static void dump_cqe(struct mthca_dev *dev, void *cqe_ptr)
{
	__be32 *cqe = cqe_ptr;

	(void) cqe;	/* avoid warning if mthca_dbg compiled away... */
	mthca_dbg(dev, "CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n",
		  be32_to_cpu(cqe[0]), be32_to_cpu(cqe[1]), be32_to_cpu(cqe[2]),
		  be32_to_cpu(cqe[3]), be32_to_cpu(cqe[4]), be32_to_cpu(cqe[5]),
		  be32_to_cpu(cqe[6]), be32_to_cpu(cqe[7]));
}

L
Linus Torvalds 已提交
189 190 191 192 193 194 195
/*
 * incr is ignored in native Arbel (mem-free) mode, so cq->cons_index
 * should be correct before calling update_cons_index().
 */
static inline void update_cons_index(struct mthca_dev *dev, struct mthca_cq *cq,
				     int incr)
{
196
	__be32 doorbell[2];
L
Linus Torvalds 已提交
197

198
	if (mthca_is_memfree(dev)) {
L
Linus Torvalds 已提交
199 200 201 202 203 204 205 206 207 208 209 210
		*cq->set_ci_db = cpu_to_be32(cq->cons_index);
		wmb();
	} else {
		doorbell[0] = cpu_to_be32(MTHCA_TAVOR_CQ_DB_INC_CI | cq->cqn);
		doorbell[1] = cpu_to_be32(incr - 1);

		mthca_write64(doorbell,
			      dev->kar + MTHCA_CQ_DOORBELL,
			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
	}
}

211
void mthca_cq_completion(struct mthca_dev *dev, u32 cqn)
L
Linus Torvalds 已提交
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
{
	struct mthca_cq *cq;

	cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1));

	if (!cq) {
		mthca_warn(dev, "Completion event for bogus CQ %08x\n", cqn);
		return;
	}

	++cq->arm_sn;

	cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
}

227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
void mthca_cq_event(struct mthca_dev *dev, u32 cqn,
		    enum ib_event_type event_type)
{
	struct mthca_cq *cq;
	struct ib_event event;

	spin_lock(&dev->cq_table.lock);

	cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1));

	if (cq)
		atomic_inc(&cq->refcount);
	spin_unlock(&dev->cq_table.lock);

	if (!cq) {
		mthca_warn(dev, "Async event for bogus CQ %08x\n", cqn);
		return;
	}

	event.device      = &dev->ib_dev;
	event.event       = event_type;
	event.element.cq  = &cq->ibcq;
	if (cq->ibcq.event_handler)
		cq->ibcq.event_handler(&event, cq->ibcq.cq_context);

	if (atomic_dec_and_test(&cq->refcount))
		wake_up(&cq->wait);
}

256 257
void mthca_cq_clean(struct mthca_dev *dev, u32 cqn, u32 qpn,
		    struct mthca_srq *srq)
L
Linus Torvalds 已提交
258 259 260
{
	struct mthca_cq *cq;
	struct mthca_cqe *cqe;
261
	u32 prod_index;
L
Linus Torvalds 已提交
262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295
	int nfreed = 0;

	spin_lock_irq(&dev->cq_table.lock);
	cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1));
	if (cq)
		atomic_inc(&cq->refcount);
	spin_unlock_irq(&dev->cq_table.lock);

	if (!cq)
		return;

	spin_lock_irq(&cq->lock);

	/*
	 * First we need to find the current producer index, so we
	 * know where to start cleaning from.  It doesn't matter if HW
	 * adds new entries after this loop -- the QP we're worried
	 * about is already in RESET, so the new entries won't come
	 * from our QP and therefore don't need to be checked.
	 */
	for (prod_index = cq->cons_index;
	     cqe_sw(cq, prod_index & cq->ibcq.cqe);
	     ++prod_index)
		if (prod_index == cq->cons_index + cq->ibcq.cqe)
			break;

	if (0)
		mthca_dbg(dev, "Cleaning QPN %06x from CQN %06x; ci %d, pi %d\n",
			  qpn, cqn, cq->cons_index, prod_index);

	/*
	 * Now sweep backwards through the CQ, removing CQ entries
	 * that match our QP by copying older entries on top of them.
	 */
296 297
	while ((int) --prod_index - (int) cq->cons_index >= 0) {
		cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
298 299 300
		if (cqe->my_qpn == cpu_to_be32(qpn)) {
			if (srq)
				mthca_free_srq_wqe(srq, be32_to_cpu(cqe->wqe));
L
Linus Torvalds 已提交
301
			++nfreed;
302 303 304
		} else if (nfreed)
			memcpy(get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe),
			       cqe, MTHCA_CQ_ENTRY_SIZE);
L
Linus Torvalds 已提交
305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
	}

	if (nfreed) {
		wmb();
		cq->cons_index += nfreed;
		update_cons_index(dev, cq, nfreed);
	}

	spin_unlock_irq(&cq->lock);
	if (atomic_dec_and_test(&cq->refcount))
		wake_up(&cq->wait);
}

static int handle_error_cqe(struct mthca_dev *dev, struct mthca_cq *cq,
			    struct mthca_qp *qp, int wqe_index, int is_send,
			    struct mthca_err_cqe *cqe,
			    struct ib_wc *entry, int *free_cqe)
{
	int err;
	int dbd;
325
	__be32 new_wqe;
L
Linus Torvalds 已提交
326

327 328 329 330 331 332
	if (cqe->syndrome == SYNDROME_LOCAL_QP_OP_ERR) {
		mthca_dbg(dev, "local QP operation err "
			  "(QPN %06x, WQE @ %08x, CQN %06x, index %d)\n",
			  be32_to_cpu(cqe->my_qpn), be32_to_cpu(cqe->wqe),
			  cq->cqn, cq->cons_index);
		dump_cqe(dev, cqe);
L
Linus Torvalds 已提交
333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398
	}

	/*
	 * For completions in error, only work request ID, status (and
	 * freed resource count for RD) have to be set.
	 */
	switch (cqe->syndrome) {
	case SYNDROME_LOCAL_LENGTH_ERR:
		entry->status = IB_WC_LOC_LEN_ERR;
		break;
	case SYNDROME_LOCAL_QP_OP_ERR:
		entry->status = IB_WC_LOC_QP_OP_ERR;
		break;
	case SYNDROME_LOCAL_EEC_OP_ERR:
		entry->status = IB_WC_LOC_EEC_OP_ERR;
		break;
	case SYNDROME_LOCAL_PROT_ERR:
		entry->status = IB_WC_LOC_PROT_ERR;
		break;
	case SYNDROME_WR_FLUSH_ERR:
		entry->status = IB_WC_WR_FLUSH_ERR;
		break;
	case SYNDROME_MW_BIND_ERR:
		entry->status = IB_WC_MW_BIND_ERR;
		break;
	case SYNDROME_BAD_RESP_ERR:
		entry->status = IB_WC_BAD_RESP_ERR;
		break;
	case SYNDROME_LOCAL_ACCESS_ERR:
		entry->status = IB_WC_LOC_ACCESS_ERR;
		break;
	case SYNDROME_REMOTE_INVAL_REQ_ERR:
		entry->status = IB_WC_REM_INV_REQ_ERR;
		break;
	case SYNDROME_REMOTE_ACCESS_ERR:
		entry->status = IB_WC_REM_ACCESS_ERR;
		break;
	case SYNDROME_REMOTE_OP_ERR:
		entry->status = IB_WC_REM_OP_ERR;
		break;
	case SYNDROME_RETRY_EXC_ERR:
		entry->status = IB_WC_RETRY_EXC_ERR;
		break;
	case SYNDROME_RNR_RETRY_EXC_ERR:
		entry->status = IB_WC_RNR_RETRY_EXC_ERR;
		break;
	case SYNDROME_LOCAL_RDD_VIOL_ERR:
		entry->status = IB_WC_LOC_RDD_VIOL_ERR;
		break;
	case SYNDROME_REMOTE_INVAL_RD_REQ_ERR:
		entry->status = IB_WC_REM_INV_RD_REQ_ERR;
		break;
	case SYNDROME_REMOTE_ABORTED_ERR:
		entry->status = IB_WC_REM_ABORT_ERR;
		break;
	case SYNDROME_INVAL_EECN_ERR:
		entry->status = IB_WC_INV_EECN_ERR;
		break;
	case SYNDROME_INVAL_EEC_STATE_ERR:
		entry->status = IB_WC_INV_EEC_STATE_ERR;
		break;
	default:
		entry->status = IB_WC_GENERAL_ERR;
		break;
	}

399 400 401 402 403 404 405
	/*
	 * Mem-free HCAs always generate one CQE per WQE, even in the
	 * error case, so we don't have to check the doorbell count, etc.
	 */
	if (mthca_is_memfree(dev))
		return 0;

L
Linus Torvalds 已提交
406 407 408 409 410 411 412 413 414
	err = mthca_free_err_wqe(dev, qp, is_send, wqe_index, &dbd, &new_wqe);
	if (err)
		return err;

	/*
	 * If we're at the end of the WQE chain, or we've used up our
	 * doorbell count, free the CQE.  Otherwise just update it for
	 * the next poll operation.
	 */
415
	if (!(new_wqe & cpu_to_be32(0x3f)) || (!cqe->db_cnt && dbd))
L
Linus Torvalds 已提交
416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454
		return 0;

	cqe->db_cnt   = cpu_to_be16(be16_to_cpu(cqe->db_cnt) - dbd);
	cqe->wqe      = new_wqe;
	cqe->syndrome = SYNDROME_WR_FLUSH_ERR;

	*free_cqe = 0;

	return 0;
}

static inline int mthca_poll_one(struct mthca_dev *dev,
				 struct mthca_cq *cq,
				 struct mthca_qp **cur_qp,
				 int *freed,
				 struct ib_wc *entry)
{
	struct mthca_wq *wq;
	struct mthca_cqe *cqe;
	int wqe_index;
	int is_error;
	int is_send;
	int free_cqe = 1;
	int err = 0;

	cqe = next_cqe_sw(cq);
	if (!cqe)
		return -EAGAIN;

	/*
	 * Make sure we read CQ entry contents after we've checked the
	 * ownership bit.
	 */
	rmb();

	if (0) {
		mthca_dbg(dev, "%x/%d: CQE -> QPN %06x, WQE @ %08x\n",
			  cq->cqn, cq->cons_index, be32_to_cpu(cqe->my_qpn),
			  be32_to_cpu(cqe->wqe));
455
		dump_cqe(dev, cqe);
L
Linus Torvalds 已提交
456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486
	}

	is_error = (cqe->opcode & MTHCA_ERROR_CQE_OPCODE_MASK) ==
		MTHCA_ERROR_CQE_OPCODE_MASK;
	is_send  = is_error ? cqe->opcode & 0x01 : cqe->is_send & 0x80;

	if (!*cur_qp || be32_to_cpu(cqe->my_qpn) != (*cur_qp)->qpn) {
		/*
		 * We do not have to take the QP table lock here,
		 * because CQs will be locked while QPs are removed
		 * from the table.
		 */
		*cur_qp = mthca_array_get(&dev->qp_table.qp,
					  be32_to_cpu(cqe->my_qpn) &
					  (dev->limits.num_qps - 1));
		if (!*cur_qp) {
			mthca_warn(dev, "CQ entry for unknown QP %06x\n",
				   be32_to_cpu(cqe->my_qpn) & 0xffffff);
			err = -EINVAL;
			goto out;
		}
	}

	entry->qp_num = (*cur_qp)->qpn;

	if (is_send) {
		wq = &(*cur_qp)->sq;
		wqe_index = ((be32_to_cpu(cqe->wqe) - (*cur_qp)->send_wqe_offset)
			     >> wq->wqe_shift);
		entry->wr_id = (*cur_qp)->wrid[wqe_index +
					       (*cur_qp)->rq.max];
487 488 489 490 491 492 493
	} else if ((*cur_qp)->ibqp.srq) {
		struct mthca_srq *srq = to_msrq((*cur_qp)->ibqp.srq);
		u32 wqe = be32_to_cpu(cqe->wqe);
		wq = NULL;
		wqe_index = wqe >> srq->wqe_shift;
		entry->wr_id = srq->wrid[wqe_index];
		mthca_free_srq_wqe(srq, wqe);
L
Linus Torvalds 已提交
494 495 496 497 498 499
	} else {
		wq = &(*cur_qp)->rq;
		wqe_index = be32_to_cpu(cqe->wqe) >> wq->wqe_shift;
		entry->wr_id = (*cur_qp)->wrid[wqe_index];
	}

500 501 502 503 504
	if (wq) {
		if (wq->last_comp < wqe_index)
			wq->tail += wqe_index - wq->last_comp;
		else
			wq->tail += wqe_index + wq->max - wq->last_comp;
L
Linus Torvalds 已提交
505

506 507
		wq->last_comp = wqe_index;
	}
L
Linus Torvalds 已提交
508 509 510 511 512 513 514 515 516

	if (is_error) {
		err = handle_error_cqe(dev, cq, *cur_qp, wqe_index, is_send,
				       (struct mthca_err_cqe *) cqe,
				       entry, &free_cqe);
		goto out;
	}

	if (is_send) {
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551
		entry->wc_flags = 0;
		switch (cqe->opcode) {
		case MTHCA_OPCODE_RDMA_WRITE:
			entry->opcode    = IB_WC_RDMA_WRITE;
			break;
		case MTHCA_OPCODE_RDMA_WRITE_IMM:
			entry->opcode    = IB_WC_RDMA_WRITE;
			entry->wc_flags |= IB_WC_WITH_IMM;
			break;
		case MTHCA_OPCODE_SEND:
			entry->opcode    = IB_WC_SEND;
			break;
		case MTHCA_OPCODE_SEND_IMM:
			entry->opcode    = IB_WC_SEND;
			entry->wc_flags |= IB_WC_WITH_IMM;
			break;
		case MTHCA_OPCODE_RDMA_READ:
			entry->opcode    = IB_WC_RDMA_READ;
			entry->byte_len  = be32_to_cpu(cqe->byte_cnt);
			break;
		case MTHCA_OPCODE_ATOMIC_CS:
			entry->opcode    = IB_WC_COMP_SWAP;
			entry->byte_len  = be32_to_cpu(cqe->byte_cnt);
			break;
		case MTHCA_OPCODE_ATOMIC_FA:
			entry->opcode    = IB_WC_FETCH_ADD;
			entry->byte_len  = be32_to_cpu(cqe->byte_cnt);
			break;
		case MTHCA_OPCODE_BIND_MW:
			entry->opcode    = IB_WC_BIND_MW;
			break;
		default:
			entry->opcode    = MTHCA_OPCODE_INVALID;
			break;
		}
L
Linus Torvalds 已提交
552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624
	} else {
		entry->byte_len = be32_to_cpu(cqe->byte_cnt);
		switch (cqe->opcode & 0x1f) {
		case IB_OPCODE_SEND_LAST_WITH_IMMEDIATE:
		case IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE:
			entry->wc_flags = IB_WC_WITH_IMM;
			entry->imm_data = cqe->imm_etype_pkey_eec;
			entry->opcode = IB_WC_RECV;
			break;
		case IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE:
		case IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE:
			entry->wc_flags = IB_WC_WITH_IMM;
			entry->imm_data = cqe->imm_etype_pkey_eec;
			entry->opcode = IB_WC_RECV_RDMA_WITH_IMM;
			break;
		default:
			entry->wc_flags = 0;
			entry->opcode = IB_WC_RECV;
			break;
		}
		entry->slid 	   = be16_to_cpu(cqe->rlid);
		entry->sl   	   = be16_to_cpu(cqe->sl_g_mlpath) >> 12;
		entry->src_qp 	   = be32_to_cpu(cqe->rqpn) & 0xffffff;
		entry->dlid_path_bits = be16_to_cpu(cqe->sl_g_mlpath) & 0x7f;
		entry->pkey_index  = be32_to_cpu(cqe->imm_etype_pkey_eec) >> 16;
		entry->wc_flags   |= be16_to_cpu(cqe->sl_g_mlpath) & 0x80 ?
					IB_WC_GRH : 0;
	}

	entry->status = IB_WC_SUCCESS;

 out:
	if (likely(free_cqe)) {
		set_cqe_hw(cqe);
		++(*freed);
		++cq->cons_index;
	}

	return err;
}

int mthca_poll_cq(struct ib_cq *ibcq, int num_entries,
		  struct ib_wc *entry)
{
	struct mthca_dev *dev = to_mdev(ibcq->device);
	struct mthca_cq *cq = to_mcq(ibcq);
	struct mthca_qp *qp = NULL;
	unsigned long flags;
	int err = 0;
	int freed = 0;
	int npolled;

	spin_lock_irqsave(&cq->lock, flags);

	for (npolled = 0; npolled < num_entries; ++npolled) {
		err = mthca_poll_one(dev, cq, &qp,
				     &freed, entry + npolled);
		if (err)
			break;
	}

	if (freed) {
		wmb();
		update_cons_index(dev, cq, freed);
	}

	spin_unlock_irqrestore(&cq->lock, flags);

	return err == 0 || err == -EAGAIN ? npolled : err;
}

int mthca_tavor_arm_cq(struct ib_cq *cq, enum ib_cq_notify notify)
{
625
	__be32 doorbell[2];
L
Linus Torvalds 已提交
626 627 628 629 630

	doorbell[0] = cpu_to_be32((notify == IB_CQ_SOLICITED ?
				   MTHCA_TAVOR_CQ_DB_REQ_NOT_SOL :
				   MTHCA_TAVOR_CQ_DB_REQ_NOT)      |
				  to_mcq(cq)->cqn);
631
	doorbell[1] = (__force __be32) 0xffffffff;
L
Linus Torvalds 已提交
632 633 634 635 636 637 638 639 640 641 642

	mthca_write64(doorbell,
		      to_mdev(cq->device)->kar + MTHCA_CQ_DOORBELL,
		      MTHCA_GET_DOORBELL_LOCK(&to_mdev(cq->device)->doorbell_lock));

	return 0;
}

int mthca_arbel_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify notify)
{
	struct mthca_cq *cq = to_mcq(ibcq);
643
	__be32 doorbell[2];
L
Linus Torvalds 已提交
644
	u32 sn;
645
	__be32 ci;
L
Linus Torvalds 已提交
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677

	sn = cq->arm_sn & 3;
	ci = cpu_to_be32(cq->cons_index);

	doorbell[0] = ci;
	doorbell[1] = cpu_to_be32((cq->cqn << 8) | (2 << 5) | (sn << 3) |
				  (notify == IB_CQ_SOLICITED ? 1 : 2));

	mthca_write_db_rec(doorbell, cq->arm_db);

	/*
	 * Make sure that the doorbell record in host memory is
	 * written before ringing the doorbell via PCI MMIO.
	 */
	wmb();

	doorbell[0] = cpu_to_be32((sn << 28)                       |
				  (notify == IB_CQ_SOLICITED ?
				   MTHCA_ARBEL_CQ_DB_REQ_NOT_SOL :
				   MTHCA_ARBEL_CQ_DB_REQ_NOT)      |
				  cq->cqn);
	doorbell[1] = ci;

	mthca_write64(doorbell,
		      to_mdev(ibcq->device)->kar + MTHCA_CQ_DOORBELL,
		      MTHCA_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->doorbell_lock));

	return 0;
}

static void mthca_free_cq_buf(struct mthca_dev *dev, struct mthca_cq *cq)
{
678 679
	mthca_buf_free(dev, (cq->ibcq.cqe + 1) * MTHCA_CQ_ENTRY_SIZE,
		       &cq->queue, cq->is_direct, &cq->mr);
L
Linus Torvalds 已提交
680 681 682
}

int mthca_init_cq(struct mthca_dev *dev, int nent,
683
		  struct mthca_ucontext *ctx, u32 pdn,
L
Linus Torvalds 已提交
684 685 686
		  struct mthca_cq *cq)
{
	int size = nent * MTHCA_CQ_ENTRY_SIZE;
687
	struct mthca_mailbox *mailbox;
L
Linus Torvalds 已提交
688 689 690 691 692 693 694
	struct mthca_cq_context *cq_context;
	int err = -ENOMEM;
	u8 status;
	int i;

	might_sleep();

695 696
	cq->ibcq.cqe  = nent - 1;
	cq->is_kernel = !ctx;
L
Linus Torvalds 已提交
697 698 699 700 701

	cq->cqn = mthca_alloc(&dev->cq_table.alloc);
	if (cq->cqn == -1)
		return -ENOMEM;

702
	if (mthca_is_memfree(dev)) {
L
Linus Torvalds 已提交
703 704 705 706
		err = mthca_table_get(dev, dev->cq_table.table, cq->cqn);
		if (err)
			goto err_out;

707 708 709 710
		if (cq->is_kernel) {
			cq->arm_sn = 1;

			err = -ENOMEM;
L
Linus Torvalds 已提交
711

712 713 714 715
			cq->set_ci_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_SET_CI,
							     cq->cqn, &cq->set_ci_db);
			if (cq->set_ci_db_index < 0)
				goto err_out_icm;
L
Linus Torvalds 已提交
716

717 718 719 720 721
			cq->arm_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_ARM,
							  cq->cqn, &cq->arm_db);
			if (cq->arm_db_index < 0)
				goto err_out_ci;
		}
L
Linus Torvalds 已提交
722 723
	}

724 725 726
	mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
	if (IS_ERR(mailbox))
		goto err_out_arm;
L
Linus Torvalds 已提交
727

728
	cq_context = mailbox->buf;
L
Linus Torvalds 已提交
729

730
	if (cq->is_kernel) {
731 732 733
		err = mthca_buf_alloc(dev, size, MTHCA_MAX_DIRECT_CQ_SIZE,
				      &cq->queue, &cq->is_direct,
				      &dev->driver_pd, 1, &cq->mr);
734 735
		if (err)
			goto err_out_mailbox;
L
Linus Torvalds 已提交
736

737 738 739
		for (i = 0; i < nent; ++i)
			set_cqe_hw(get_cqe(cq, i));
	}
L
Linus Torvalds 已提交
740 741 742 743 744 745 746 747 748

	spin_lock_init(&cq->lock);
	atomic_set(&cq->refcount, 1);
	init_waitqueue_head(&cq->wait);

	memset(cq_context, 0, sizeof *cq_context);
	cq_context->flags           = cpu_to_be32(MTHCA_CQ_STATUS_OK      |
						  MTHCA_CQ_STATE_DISARMED |
						  MTHCA_CQ_FLAG_TR);
749 750 751 752 753
	cq_context->logsize_usrpage = cpu_to_be32((ffs(nent) - 1) << 24);
	if (ctx)
		cq_context->logsize_usrpage |= cpu_to_be32(ctx->uar.index);
	else
		cq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index);
L
Linus Torvalds 已提交
754 755
	cq_context->error_eqn       = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn);
	cq_context->comp_eqn        = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_COMP].eqn);
756
	cq_context->pd              = cpu_to_be32(pdn);
L
Linus Torvalds 已提交
757 758 759
	cq_context->lkey            = cpu_to_be32(cq->mr.ibmr.lkey);
	cq_context->cqn             = cpu_to_be32(cq->cqn);

760
	if (mthca_is_memfree(dev)) {
L
Linus Torvalds 已提交
761 762 763 764
		cq_context->ci_db    = cpu_to_be32(cq->set_ci_db_index);
		cq_context->state_db = cpu_to_be32(cq->arm_db_index);
	}

765
	err = mthca_SW2HW_CQ(dev, mailbox, cq->cqn, &status);
L
Linus Torvalds 已提交
766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
	if (err) {
		mthca_warn(dev, "SW2HW_CQ failed (%d)\n", err);
		goto err_out_free_mr;
	}

	if (status) {
		mthca_warn(dev, "SW2HW_CQ returned status 0x%02x\n",
			   status);
		err = -EINVAL;
		goto err_out_free_mr;
	}

	spin_lock_irq(&dev->cq_table.lock);
	if (mthca_array_set(&dev->cq_table.cq,
			    cq->cqn & (dev->limits.num_cqs - 1),
			    cq)) {
		spin_unlock_irq(&dev->cq_table.lock);
		goto err_out_free_mr;
	}
	spin_unlock_irq(&dev->cq_table.lock);

	cq->cons_index = 0;

789
	mthca_free_mailbox(dev, mailbox);
L
Linus Torvalds 已提交
790 791 792 793

	return 0;

err_out_free_mr:
794
	if (cq->is_kernel)
795
		mthca_free_cq_buf(dev, cq);
L
Linus Torvalds 已提交
796 797

err_out_mailbox:
798
	mthca_free_mailbox(dev, mailbox);
L
Linus Torvalds 已提交
799

800
err_out_arm:
801
	if (cq->is_kernel && mthca_is_memfree(dev))
802
		mthca_free_db(dev, MTHCA_DB_TYPE_CQ_ARM, cq->arm_db_index);
L
Linus Torvalds 已提交
803 804

err_out_ci:
805
	if (cq->is_kernel && mthca_is_memfree(dev))
806
		mthca_free_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, cq->set_ci_db_index);
L
Linus Torvalds 已提交
807 808 809 810 811 812 813 814 815 816 817 818 819

err_out_icm:
	mthca_table_put(dev, dev->cq_table.table, cq->cqn);

err_out:
	mthca_free(&dev->cq_table.alloc, cq->cqn);

	return err;
}

void mthca_free_cq(struct mthca_dev *dev,
		   struct mthca_cq *cq)
{
820
	struct mthca_mailbox *mailbox;
L
Linus Torvalds 已提交
821 822 823 824 825
	int err;
	u8 status;

	might_sleep();

826 827
	mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
	if (IS_ERR(mailbox)) {
L
Linus Torvalds 已提交
828 829 830 831
		mthca_warn(dev, "No memory for mailbox to free CQ.\n");
		return;
	}

832
	err = mthca_HW2SW_CQ(dev, mailbox, cq->cqn, &status);
L
Linus Torvalds 已提交
833 834 835
	if (err)
		mthca_warn(dev, "HW2SW_CQ failed (%d)\n", err);
	else if (status)
836
		mthca_warn(dev, "HW2SW_CQ returned status 0x%02x\n", status);
L
Linus Torvalds 已提交
837 838

	if (0) {
839
		__be32 *ctx = mailbox->buf;
L
Linus Torvalds 已提交
840 841 842
		int j;

		printk(KERN_ERR "context for CQN %x (cons index %x, next sw %d)\n",
843 844
		       cq->cqn, cq->cons_index,
		       cq->is_kernel ? !!next_cqe_sw(cq) : 0);
L
Linus Torvalds 已提交
845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861
		for (j = 0; j < 16; ++j)
			printk(KERN_ERR "[%2x] %08x\n", j * 4, be32_to_cpu(ctx[j]));
	}

	spin_lock_irq(&dev->cq_table.lock);
	mthca_array_clear(&dev->cq_table.cq,
			  cq->cqn & (dev->limits.num_cqs - 1));
	spin_unlock_irq(&dev->cq_table.lock);

	if (dev->mthca_flags & MTHCA_FLAG_MSI_X)
		synchronize_irq(dev->eq_table.eq[MTHCA_EQ_COMP].msi_x_vector);
	else
		synchronize_irq(dev->pdev->irq);

	atomic_dec(&cq->refcount);
	wait_event(cq->wait, !atomic_read(&cq->refcount));

862 863 864 865 866 867
	if (cq->is_kernel) {
		mthca_free_cq_buf(dev, cq);
		if (mthca_is_memfree(dev)) {
			mthca_free_db(dev, MTHCA_DB_TYPE_CQ_ARM,    cq->arm_db_index);
			mthca_free_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, cq->set_ci_db_index);
		}
L
Linus Torvalds 已提交
868 869
	}

870
	mthca_table_put(dev, dev->cq_table.table, cq->cqn);
L
Linus Torvalds 已提交
871
	mthca_free(&dev->cq_table.alloc, cq->cqn);
872
	mthca_free_mailbox(dev, mailbox);
L
Linus Torvalds 已提交
873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900
}

int __devinit mthca_init_cq_table(struct mthca_dev *dev)
{
	int err;

	spin_lock_init(&dev->cq_table.lock);

	err = mthca_alloc_init(&dev->cq_table.alloc,
			       dev->limits.num_cqs,
			       (1 << 24) - 1,
			       dev->limits.reserved_cqs);
	if (err)
		return err;

	err = mthca_array_init(&dev->cq_table.cq,
			       dev->limits.num_cqs);
	if (err)
		mthca_alloc_cleanup(&dev->cq_table.alloc);

	return err;
}

void __devexit mthca_cleanup_cq_table(struct mthca_dev *dev)
{
	mthca_array_cleanup(&dev->cq_table.cq, dev->limits.num_cqs);
	mthca_alloc_cleanup(&dev->cq_table.alloc);
}