main.c 24.3 KB
Newer Older
R
Ram Amrani 已提交
1 2 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
/* QLogic qedr NIC Driver
 * Copyright (c) 2015-2016  QLogic Corporation
 *
 * 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.
 */
#include <linux/module.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_addr.h>
35
#include <rdma/ib_user_verbs.h>
R
Ram Amrani 已提交
36 37
#include <linux/netdevice.h>
#include <linux/iommu.h>
38
#include <linux/pci.h>
R
Ram Amrani 已提交
39
#include <net/addrconf.h>
40

R
Ram Amrani 已提交
41 42
#include <linux/qed/qed_chain.h>
#include <linux/qed/qed_if.h>
R
Ram Amrani 已提交
43
#include "qedr.h"
44 45
#include "verbs.h"
#include <rdma/qedr-abi.h>
R
Ram Amrani 已提交
46 47 48 49 50

MODULE_DESCRIPTION("QLogic 40G/100G ROCE Driver");
MODULE_AUTHOR("QLogic Corporation");
MODULE_LICENSE("Dual BSD/GPL");

R
Ram Amrani 已提交
51 52
#define QEDR_WQ_MULTIPLIER_DFT	(3)

R
Ram Amrani 已提交
53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70
void qedr_ib_dispatch_event(struct qedr_dev *dev, u8 port_num,
			    enum ib_event_type type)
{
	struct ib_event ibev;

	ibev.device = &dev->ibdev;
	ibev.element.port_num = port_num;
	ibev.event = type;

	ib_dispatch_event(&ibev);
}

static enum rdma_link_layer qedr_link_layer(struct ib_device *device,
					    u8 port_num)
{
	return IB_LINK_LAYER_ETHERNET;
}

R
Ram Amrani 已提交
71 72 73 74 75 76 77 78 79 80 81
static void qedr_get_dev_fw_str(struct ib_device *ibdev, char *str,
				size_t str_len)
{
	struct qedr_dev *qedr = get_qedr_dev(ibdev);
	u32 fw_ver = (u32)qedr->attr.fw_ver;

	snprintf(str, str_len, "%d. %d. %d. %d",
		 (fw_ver >> 24) & 0xFF, (fw_ver >> 16) & 0xFF,
		 (fw_ver >> 8) & 0xFF, fw_ver & 0xFF);
}

82 83 84 85 86 87 88 89 90 91 92 93 94 95
static struct net_device *qedr_get_netdev(struct ib_device *dev, u8 port_num)
{
	struct qedr_dev *qdev;

	qdev = get_qedr_dev(dev);
	dev_hold(qdev->ndev);

	/* The HW vendor's device driver must guarantee
	 * that this function returns NULL before the net device reaches
	 * NETDEV_UNREGISTER_FINAL state.
	 */
	return qdev->ndev;
}

R
Ram Amrani 已提交
96 97 98 99
static int qedr_register_device(struct qedr_dev *dev)
{
	strlcpy(dev->ibdev.name, "qedr%d", IB_DEVICE_NAME_MAX);

100
	dev->ibdev.node_guid = dev->attr.node_guid;
R
Ram Amrani 已提交
101 102
	memcpy(dev->ibdev.node_desc, QEDR_NODE_DESC, sizeof(QEDR_NODE_DESC));
	dev->ibdev.owner = THIS_MODULE;
103 104 105 106
	dev->ibdev.uverbs_abi_ver = QEDR_ABI_VERSION;

	dev->ibdev.uverbs_cmd_mask = QEDR_UVERBS(GET_CONTEXT) |
				     QEDR_UVERBS(QUERY_DEVICE) |
107 108 109 110 111 112 113
				     QEDR_UVERBS(QUERY_PORT) |
				     QEDR_UVERBS(ALLOC_PD) |
				     QEDR_UVERBS(DEALLOC_PD) |
				     QEDR_UVERBS(CREATE_COMP_CHANNEL) |
				     QEDR_UVERBS(CREATE_CQ) |
				     QEDR_UVERBS(RESIZE_CQ) |
				     QEDR_UVERBS(DESTROY_CQ) |
R
Ram Amrani 已提交
114 115 116 117
				     QEDR_UVERBS(REQ_NOTIFY_CQ) |
				     QEDR_UVERBS(CREATE_QP) |
				     QEDR_UVERBS(MODIFY_QP) |
				     QEDR_UVERBS(QUERY_QP) |
118 119
				     QEDR_UVERBS(DESTROY_QP) |
				     QEDR_UVERBS(REG_MR) |
R
Ram Amrani 已提交
120 121 122 123
				     QEDR_UVERBS(DEREG_MR) |
				     QEDR_UVERBS(POLL_CQ) |
				     QEDR_UVERBS(POST_SEND) |
				     QEDR_UVERBS(POST_RECV);
124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140

	dev->ibdev.phys_port_cnt = 1;
	dev->ibdev.num_comp_vectors = dev->num_cnq;
	dev->ibdev.node_type = RDMA_NODE_IB_CA;

	dev->ibdev.query_device = qedr_query_device;
	dev->ibdev.query_port = qedr_query_port;
	dev->ibdev.modify_port = qedr_modify_port;

	dev->ibdev.query_gid = qedr_query_gid;
	dev->ibdev.add_gid = qedr_add_gid;
	dev->ibdev.del_gid = qedr_del_gid;

	dev->ibdev.alloc_ucontext = qedr_alloc_ucontext;
	dev->ibdev.dealloc_ucontext = qedr_dealloc_ucontext;
	dev->ibdev.mmap = qedr_mmap;

141 142 143 144 145 146 147 148
	dev->ibdev.alloc_pd = qedr_alloc_pd;
	dev->ibdev.dealloc_pd = qedr_dealloc_pd;

	dev->ibdev.create_cq = qedr_create_cq;
	dev->ibdev.destroy_cq = qedr_destroy_cq;
	dev->ibdev.resize_cq = qedr_resize_cq;
	dev->ibdev.req_notify_cq = qedr_arm_cq;

R
Ram Amrani 已提交
149 150 151 152 153
	dev->ibdev.create_qp = qedr_create_qp;
	dev->ibdev.modify_qp = qedr_modify_qp;
	dev->ibdev.query_qp = qedr_query_qp;
	dev->ibdev.destroy_qp = qedr_destroy_qp;

154 155
	dev->ibdev.query_pkey = qedr_query_pkey;

R
Ram Amrani 已提交
156 157 158
	dev->ibdev.create_ah = qedr_create_ah;
	dev->ibdev.destroy_ah = qedr_destroy_ah;

159 160 161 162 163 164
	dev->ibdev.get_dma_mr = qedr_get_dma_mr;
	dev->ibdev.dereg_mr = qedr_dereg_mr;
	dev->ibdev.reg_user_mr = qedr_reg_user_mr;
	dev->ibdev.alloc_mr = qedr_alloc_mr;
	dev->ibdev.map_mr_sg = qedr_map_mr_sg;

R
Ram Amrani 已提交
165 166 167 168
	dev->ibdev.poll_cq = qedr_poll_cq;
	dev->ibdev.post_send = qedr_post_send;
	dev->ibdev.post_recv = qedr_post_recv;

169 170 171 172
	dev->ibdev.process_mad = qedr_process_mad;
	dev->ibdev.get_port_immutable = qedr_port_immutable;
	dev->ibdev.get_netdev = qedr_get_netdev;

173
	dev->ibdev.dev.parent = &dev->pdev->dev;
R
Ram Amrani 已提交
174 175

	dev->ibdev.get_link_layer = qedr_link_layer;
R
Ram Amrani 已提交
176
	dev->ibdev.get_dev_fw_str = qedr_get_dev_fw_str;
R
Ram Amrani 已提交
177

178
	return ib_register_device(&dev->ibdev, NULL);
R
Ram Amrani 已提交
179 180
}

R
Ram Amrani 已提交
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277
/* This function allocates fast-path status block memory */
static int qedr_alloc_mem_sb(struct qedr_dev *dev,
			     struct qed_sb_info *sb_info, u16 sb_id)
{
	struct status_block *sb_virt;
	dma_addr_t sb_phys;
	int rc;

	sb_virt = dma_alloc_coherent(&dev->pdev->dev,
				     sizeof(*sb_virt), &sb_phys, GFP_KERNEL);
	if (!sb_virt)
		return -ENOMEM;

	rc = dev->ops->common->sb_init(dev->cdev, sb_info,
				       sb_virt, sb_phys, sb_id,
				       QED_SB_TYPE_CNQ);
	if (rc) {
		pr_err("Status block initialization failed\n");
		dma_free_coherent(&dev->pdev->dev, sizeof(*sb_virt),
				  sb_virt, sb_phys);
		return rc;
	}

	return 0;
}

static void qedr_free_mem_sb(struct qedr_dev *dev,
			     struct qed_sb_info *sb_info, int sb_id)
{
	if (sb_info->sb_virt) {
		dev->ops->common->sb_release(dev->cdev, sb_info, sb_id);
		dma_free_coherent(&dev->pdev->dev, sizeof(*sb_info->sb_virt),
				  (void *)sb_info->sb_virt, sb_info->sb_phys);
	}
}

static void qedr_free_resources(struct qedr_dev *dev)
{
	int i;

	for (i = 0; i < dev->num_cnq; i++) {
		qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i);
		dev->ops->common->chain_free(dev->cdev, &dev->cnq_array[i].pbl);
	}

	kfree(dev->cnq_array);
	kfree(dev->sb_array);
	kfree(dev->sgid_tbl);
}

static int qedr_alloc_resources(struct qedr_dev *dev)
{
	struct qedr_cnq *cnq;
	__le16 *cons_pi;
	u16 n_entries;
	int i, rc;

	dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
				QEDR_MAX_SGID, GFP_KERNEL);
	if (!dev->sgid_tbl)
		return -ENOMEM;

	spin_lock_init(&dev->sgid_lock);

	/* Allocate Status blocks for CNQ */
	dev->sb_array = kcalloc(dev->num_cnq, sizeof(*dev->sb_array),
				GFP_KERNEL);
	if (!dev->sb_array) {
		rc = -ENOMEM;
		goto err1;
	}

	dev->cnq_array = kcalloc(dev->num_cnq,
				 sizeof(*dev->cnq_array), GFP_KERNEL);
	if (!dev->cnq_array) {
		rc = -ENOMEM;
		goto err2;
	}

	dev->sb_start = dev->ops->rdma_get_start_sb(dev->cdev);

	/* Allocate CNQ PBLs */
	n_entries = min_t(u32, QED_RDMA_MAX_CNQ_SIZE, QEDR_ROCE_MAX_CNQ_SIZE);
	for (i = 0; i < dev->num_cnq; i++) {
		cnq = &dev->cnq_array[i];

		rc = qedr_alloc_mem_sb(dev, &dev->sb_array[i],
				       dev->sb_start + i);
		if (rc)
			goto err3;

		rc = dev->ops->common->chain_alloc(dev->cdev,
						   QED_CHAIN_USE_TO_CONSUME,
						   QED_CHAIN_MODE_PBL,
						   QED_CHAIN_CNT_TYPE_U16,
						   n_entries,
						   sizeof(struct regpair *),
278
						   &cnq->pbl, NULL);
R
Ram Amrani 已提交
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
		if (rc)
			goto err4;

		cnq->dev = dev;
		cnq->sb = &dev->sb_array[i];
		cons_pi = dev->sb_array[i].sb_virt->pi_array;
		cnq->hw_cons_ptr = &cons_pi[QED_ROCE_PROTOCOL_INDEX];
		cnq->index = i;
		sprintf(cnq->name, "qedr%d@pci:%s", i, pci_name(dev->pdev));

		DP_DEBUG(dev, QEDR_MSG_INIT, "cnq[%d].cons=%d\n",
			 i, qed_chain_get_cons_idx(&cnq->pbl));
	}

	return 0;
err4:
	qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i);
err3:
	for (--i; i >= 0; i--) {
		dev->ops->common->chain_free(dev->cdev, &dev->cnq_array[i].pbl);
		qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i);
	}
	kfree(dev->cnq_array);
err2:
	kfree(dev->sb_array);
err1:
	kfree(dev->sgid_tbl);
	return rc;
}

R
Ram Amrani 已提交
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
/* QEDR sysfs interface */
static ssize_t show_rev(struct device *device, struct device_attribute *attr,
			char *buf)
{
	struct qedr_dev *dev = dev_get_drvdata(device);

	return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->pdev->vendor);
}

static ssize_t show_hca_type(struct device *device,
			     struct device_attribute *attr, char *buf)
{
	return scnprintf(buf, PAGE_SIZE, "%s\n", "HCA_TYPE_TO_SET");
}

static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);

static struct device_attribute *qedr_attributes[] = {
	&dev_attr_hw_rev,
	&dev_attr_hca_type
};

static void qedr_remove_sysfiles(struct qedr_dev *dev)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(qedr_attributes); i++)
		device_remove_file(&dev->ibdev.dev, qedr_attributes[i]);
}

static void qedr_pci_set_atomic(struct qedr_dev *dev, struct pci_dev *pdev)
{
	struct pci_dev *bridge;
343 344 345
	u32 ctl2, cap2;
	u16 flags;
	int rc;
R
Ram Amrani 已提交
346 347 348

	bridge = pdev->bus->self;
	if (!bridge)
349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367
		goto disable;

	/* Check atomic routing support all the way to root complex */
	while (bridge->bus->parent) {
		rc = pcie_capability_read_word(bridge, PCI_EXP_FLAGS, &flags);
		if (rc || ((flags & PCI_EXP_FLAGS_VERS) < 2))
			goto disable;

		rc = pcie_capability_read_dword(bridge, PCI_EXP_DEVCAP2, &cap2);
		if (rc)
			goto disable;

		rc = pcie_capability_read_dword(bridge, PCI_EXP_DEVCTL2, &ctl2);
		if (rc)
			goto disable;

		if (!(cap2 & PCI_EXP_DEVCAP2_ATOMIC_ROUTE) ||
		    (ctl2 & PCI_EXP_DEVCTL2_ATOMIC_EGRESS_BLOCK))
			goto disable;
R
Ram Amrani 已提交
368 369 370
		bridge = bridge->bus->parent->self;
	}

371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
	rc = pcie_capability_read_word(bridge, PCI_EXP_FLAGS, &flags);
	if (rc || ((flags & PCI_EXP_FLAGS_VERS) < 2))
		goto disable;

	rc = pcie_capability_read_dword(bridge, PCI_EXP_DEVCAP2, &cap2);
	if (rc || !(cap2 & PCI_EXP_DEVCAP2_ATOMIC_COMP64))
		goto disable;

	/* Set atomic operations */
	pcie_capability_set_word(pdev, PCI_EXP_DEVCTL2,
				 PCI_EXP_DEVCTL2_ATOMIC_REQ);
	dev->atomic_cap = IB_ATOMIC_GLOB;

	DP_DEBUG(dev, QEDR_MSG_INIT, "Atomic capability enabled\n");

	return;

disable:
	pcie_capability_clear_word(pdev, PCI_EXP_DEVCTL2,
				   PCI_EXP_DEVCTL2_ATOMIC_REQ);
	dev->atomic_cap = IB_ATOMIC_NONE;

	DP_DEBUG(dev, QEDR_MSG_INIT, "Atomic capability disabled\n");

R
Ram Amrani 已提交
395 396
}

R
Ram Amrani 已提交
397 398 399 400 401 402 403 404
static const struct qed_rdma_ops *qed_ops;

#define HILO_U64(hi, lo)		((((u64)(hi)) << 32) + (lo))

static irqreturn_t qedr_irq_handler(int irq, void *handle)
{
	u16 hw_comp_cons, sw_comp_cons;
	struct qedr_cnq *cnq = handle;
405 406
	struct regpair *cq_handle;
	struct qedr_cq *cq;
R
Ram Amrani 已提交
407 408 409 410 411 412 413 414 415 416 417 418

	qed_sb_ack(cnq->sb, IGU_INT_DISABLE, 0);

	qed_sb_update_sb_idx(cnq->sb);

	hw_comp_cons = le16_to_cpu(*cnq->hw_cons_ptr);
	sw_comp_cons = qed_chain_get_cons_idx(&cnq->pbl);

	/* Align protocol-index and chain reads */
	rmb();

	while (sw_comp_cons != hw_comp_cons) {
419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440
		cq_handle = (struct regpair *)qed_chain_consume(&cnq->pbl);
		cq = (struct qedr_cq *)(uintptr_t)HILO_U64(cq_handle->hi,
				cq_handle->lo);

		if (cq == NULL) {
			DP_ERR(cnq->dev,
			       "Received NULL CQ cq_handle->hi=%d cq_handle->lo=%d sw_comp_cons=%d hw_comp_cons=%d\n",
			       cq_handle->hi, cq_handle->lo, sw_comp_cons,
			       hw_comp_cons);

			break;
		}

		if (cq->sig != QEDR_CQ_MAGIC_NUMBER) {
			DP_ERR(cnq->dev,
			       "Problem with cq signature, cq_handle->hi=%d ch_handle->lo=%d cq=%p\n",
			       cq_handle->hi, cq_handle->lo, cq);
			break;
		}

		cq->arm_flags = 0;

441
		if (!cq->destroyed && cq->ibcq.comp_handler)
442 443 444
			(*cq->ibcq.comp_handler)
				(&cq->ibcq, cq->ibcq.cq_context);

445 446 447 448 449 450 451 452
		/* The CQ's CNQ notification counter is checked before
		 * destroying the CQ in a busy-wait loop that waits for all of
		 * the CQ's CNQ interrupts to be processed. It is increased
		 * here, only after the completion handler, to ensure that the
		 * the handler is not running when the CQ is destroyed.
		 */
		cq->cnq_notif++;

R
Ram Amrani 已提交
453
		sw_comp_cons = qed_chain_get_cons_idx(&cnq->pbl);
454

R
Ram Amrani 已提交
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600
		cnq->n_comp++;
	}

	qed_ops->rdma_cnq_prod_update(cnq->dev->rdma_ctx, cnq->index,
				      sw_comp_cons);

	qed_sb_ack(cnq->sb, IGU_INT_ENABLE, 1);

	return IRQ_HANDLED;
}

static void qedr_sync_free_irqs(struct qedr_dev *dev)
{
	u32 vector;
	int i;

	for (i = 0; i < dev->int_info.used_cnt; i++) {
		if (dev->int_info.msix_cnt) {
			vector = dev->int_info.msix[i * dev->num_hwfns].vector;
			synchronize_irq(vector);
			free_irq(vector, &dev->cnq_array[i]);
		}
	}

	dev->int_info.used_cnt = 0;
}

static int qedr_req_msix_irqs(struct qedr_dev *dev)
{
	int i, rc = 0;

	if (dev->num_cnq > dev->int_info.msix_cnt) {
		DP_ERR(dev,
		       "Interrupt mismatch: %d CNQ queues > %d MSI-x vectors\n",
		       dev->num_cnq, dev->int_info.msix_cnt);
		return -EINVAL;
	}

	for (i = 0; i < dev->num_cnq; i++) {
		rc = request_irq(dev->int_info.msix[i * dev->num_hwfns].vector,
				 qedr_irq_handler, 0, dev->cnq_array[i].name,
				 &dev->cnq_array[i]);
		if (rc) {
			DP_ERR(dev, "Request cnq %d irq failed\n", i);
			qedr_sync_free_irqs(dev);
		} else {
			DP_DEBUG(dev, QEDR_MSG_INIT,
				 "Requested cnq irq for %s [entry %d]. Cookie is at %p\n",
				 dev->cnq_array[i].name, i,
				 &dev->cnq_array[i]);
			dev->int_info.used_cnt++;
		}
	}

	return rc;
}

static int qedr_setup_irqs(struct qedr_dev *dev)
{
	int rc;

	DP_DEBUG(dev, QEDR_MSG_INIT, "qedr_setup_irqs\n");

	/* Learn Interrupt configuration */
	rc = dev->ops->rdma_set_rdma_int(dev->cdev, dev->num_cnq);
	if (rc < 0)
		return rc;

	rc = dev->ops->rdma_get_rdma_int(dev->cdev, &dev->int_info);
	if (rc) {
		DP_DEBUG(dev, QEDR_MSG_INIT, "get_rdma_int failed\n");
		return rc;
	}

	if (dev->int_info.msix_cnt) {
		DP_DEBUG(dev, QEDR_MSG_INIT, "rdma msix_cnt = %d\n",
			 dev->int_info.msix_cnt);
		rc = qedr_req_msix_irqs(dev);
		if (rc)
			return rc;
	}

	DP_DEBUG(dev, QEDR_MSG_INIT, "qedr_setup_irqs succeeded\n");

	return 0;
}

static int qedr_set_device_attr(struct qedr_dev *dev)
{
	struct qed_rdma_device *qed_attr;
	struct qedr_device_attr *attr;
	u32 page_size;

	/* Part 1 - query core capabilities */
	qed_attr = dev->ops->rdma_query_device(dev->rdma_ctx);

	/* Part 2 - check capabilities */
	page_size = ~dev->attr.page_size_caps + 1;
	if (page_size > PAGE_SIZE) {
		DP_ERR(dev,
		       "Kernel PAGE_SIZE is %ld which is smaller than minimum page size (%d) required by qedr\n",
		       PAGE_SIZE, page_size);
		return -ENODEV;
	}

	/* Part 3 - copy and update capabilities */
	attr = &dev->attr;
	attr->vendor_id = qed_attr->vendor_id;
	attr->vendor_part_id = qed_attr->vendor_part_id;
	attr->hw_ver = qed_attr->hw_ver;
	attr->fw_ver = qed_attr->fw_ver;
	attr->node_guid = qed_attr->node_guid;
	attr->sys_image_guid = qed_attr->sys_image_guid;
	attr->max_cnq = qed_attr->max_cnq;
	attr->max_sge = qed_attr->max_sge;
	attr->max_inline = qed_attr->max_inline;
	attr->max_sqe = min_t(u32, qed_attr->max_wqe, QEDR_MAX_SQE);
	attr->max_rqe = min_t(u32, qed_attr->max_wqe, QEDR_MAX_RQE);
	attr->max_qp_resp_rd_atomic_resc = qed_attr->max_qp_resp_rd_atomic_resc;
	attr->max_qp_req_rd_atomic_resc = qed_attr->max_qp_req_rd_atomic_resc;
	attr->max_dev_resp_rd_atomic_resc =
	    qed_attr->max_dev_resp_rd_atomic_resc;
	attr->max_cq = qed_attr->max_cq;
	attr->max_qp = qed_attr->max_qp;
	attr->max_mr = qed_attr->max_mr;
	attr->max_mr_size = qed_attr->max_mr_size;
	attr->max_cqe = min_t(u64, qed_attr->max_cqe, QEDR_MAX_CQES);
	attr->max_mw = qed_attr->max_mw;
	attr->max_fmr = qed_attr->max_fmr;
	attr->max_mr_mw_fmr_pbl = qed_attr->max_mr_mw_fmr_pbl;
	attr->max_mr_mw_fmr_size = qed_attr->max_mr_mw_fmr_size;
	attr->max_pd = qed_attr->max_pd;
	attr->max_ah = qed_attr->max_ah;
	attr->max_pkey = qed_attr->max_pkey;
	attr->max_srq = qed_attr->max_srq;
	attr->max_srq_wr = qed_attr->max_srq_wr;
	attr->dev_caps = qed_attr->dev_caps;
	attr->page_size_caps = qed_attr->page_size_caps;
	attr->dev_ack_delay = qed_attr->dev_ack_delay;
	attr->reserved_lkey = qed_attr->reserved_lkey;
	attr->bad_pkey_counter = qed_attr->bad_pkey_counter;
	attr->max_stats_queues = qed_attr->max_stats_queues;

	return 0;
}

R
Ram Amrani 已提交
601
void qedr_unaffiliated_event(void *context, u8 event_code)
602 603 604 605 606 607 608 609 610 611
{
	pr_err("unaffiliated event not implemented yet\n");
}

void qedr_affiliated_event(void *context, u8 e_code, void *fw_handle)
{
#define EVENT_TYPE_NOT_DEFINED	0
#define EVENT_TYPE_CQ		1
#define EVENT_TYPE_QP		2
	struct qedr_dev *dev = (struct qedr_dev *)context;
M
Mintz, Yuval 已提交
612 613
	struct regpair *async_handle = (struct regpair *)fw_handle;
	u64 roce_handle64 = ((u64) async_handle->hi << 32) + async_handle->lo;
614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
	u8 event_type = EVENT_TYPE_NOT_DEFINED;
	struct ib_event event;
	struct ib_cq *ibcq;
	struct ib_qp *ibqp;
	struct qedr_cq *cq;
	struct qedr_qp *qp;

	switch (e_code) {
	case ROCE_ASYNC_EVENT_CQ_OVERFLOW_ERR:
		event.event = IB_EVENT_CQ_ERR;
		event_type = EVENT_TYPE_CQ;
		break;
	case ROCE_ASYNC_EVENT_SQ_DRAINED:
		event.event = IB_EVENT_SQ_DRAINED;
		event_type = EVENT_TYPE_QP;
		break;
	case ROCE_ASYNC_EVENT_QP_CATASTROPHIC_ERR:
		event.event = IB_EVENT_QP_FATAL;
		event_type = EVENT_TYPE_QP;
		break;
	case ROCE_ASYNC_EVENT_LOCAL_INVALID_REQUEST_ERR:
		event.event = IB_EVENT_QP_REQ_ERR;
		event_type = EVENT_TYPE_QP;
		break;
	case ROCE_ASYNC_EVENT_LOCAL_ACCESS_ERR:
		event.event = IB_EVENT_QP_ACCESS_ERR;
		event_type = EVENT_TYPE_QP;
		break;
	default:
		DP_ERR(dev, "unsupported event %d on handle=%llx\n", e_code,
		       roce_handle64);
	}

	switch (event_type) {
	case EVENT_TYPE_CQ:
		cq = (struct qedr_cq *)(uintptr_t)roce_handle64;
		if (cq) {
			ibcq = &cq->ibcq;
			if (ibcq->event_handler) {
				event.device = ibcq->device;
				event.element.cq = ibcq;
				ibcq->event_handler(&event, ibcq->cq_context);
			}
		} else {
			WARN(1,
			     "Error: CQ event with NULL pointer ibcq. Handle=%llx\n",
			     roce_handle64);
		}
		DP_ERR(dev, "CQ event %d on hanlde %p\n", e_code, cq);
		break;
	case EVENT_TYPE_QP:
		qp = (struct qedr_qp *)(uintptr_t)roce_handle64;
		if (qp) {
			ibqp = &qp->ibqp;
			if (ibqp->event_handler) {
				event.device = ibqp->device;
				event.element.qp = ibqp;
				ibqp->event_handler(&event, ibqp->qp_context);
			}
		} else {
			WARN(1,
			     "Error: QP event with NULL pointer ibqp. Handle=%llx\n",
			     roce_handle64);
		}
		DP_ERR(dev, "QP event %d on hanlde %p\n", e_code, qp);
		break;
	default:
		break;
	}
}

R
Ram Amrani 已提交
685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712
static int qedr_init_hw(struct qedr_dev *dev)
{
	struct qed_rdma_add_user_out_params out_params;
	struct qed_rdma_start_in_params *in_params;
	struct qed_rdma_cnq_params *cur_pbl;
	struct qed_rdma_events events;
	dma_addr_t p_phys_table;
	u32 page_cnt;
	int rc = 0;
	int i;

	in_params =  kzalloc(sizeof(*in_params), GFP_KERNEL);
	if (!in_params) {
		rc = -ENOMEM;
		goto out;
	}

	in_params->desired_cnq = dev->num_cnq;
	for (i = 0; i < dev->num_cnq; i++) {
		cur_pbl = &in_params->cnq_pbl_list[i];

		page_cnt = qed_chain_get_page_cnt(&dev->cnq_array[i].pbl);
		cur_pbl->num_pbl_pages = page_cnt;

		p_phys_table = qed_chain_get_pbl_phys(&dev->cnq_array[i].pbl);
		cur_pbl->pbl_ptr = (u64)p_phys_table;
	}

713 714
	events.affiliated_event = qedr_affiliated_event;
	events.unaffiliated_event = qedr_unaffiliated_event;
R
Ram Amrani 已提交
715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749
	events.context = dev;

	in_params->events = &events;
	in_params->cq_mode = QED_RDMA_CQ_MODE_32_BITS;
	in_params->max_mtu = dev->ndev->mtu;
	ether_addr_copy(&in_params->mac_addr[0], dev->ndev->dev_addr);

	rc = dev->ops->rdma_init(dev->cdev, in_params);
	if (rc)
		goto out;

	rc = dev->ops->rdma_add_user(dev->rdma_ctx, &out_params);
	if (rc)
		goto out;

	dev->db_addr = (void *)(uintptr_t)out_params.dpi_addr;
	dev->db_phys_addr = out_params.dpi_phys_addr;
	dev->db_size = out_params.dpi_size;
	dev->dpi = out_params.dpi;

	rc = qedr_set_device_attr(dev);
out:
	kfree(in_params);
	if (rc)
		DP_ERR(dev, "Init HW Failed rc = %d\n", rc);

	return rc;
}

void qedr_stop_hw(struct qedr_dev *dev)
{
	dev->ops->rdma_remove_user(dev->rdma_ctx, dev->dpi);
	dev->ops->rdma_stop(dev->rdma_ctx);
}

R
Ram Amrani 已提交
750 751 752
static struct qedr_dev *qedr_add(struct qed_dev *cdev, struct pci_dev *pdev,
				 struct net_device *ndev)
{
R
Ram Amrani 已提交
753
	struct qed_dev_rdma_info dev_info;
R
Ram Amrani 已提交
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768
	struct qedr_dev *dev;
	int rc = 0, i;

	dev = (struct qedr_dev *)ib_alloc_device(sizeof(*dev));
	if (!dev) {
		pr_err("Unable to allocate ib device\n");
		return NULL;
	}

	DP_DEBUG(dev, QEDR_MSG_INIT, "qedr add device called\n");

	dev->pdev = pdev;
	dev->ndev = ndev;
	dev->cdev = cdev;

R
Ram Amrani 已提交
769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
	qed_ops = qed_get_rdma_ops();
	if (!qed_ops) {
		DP_ERR(dev, "Failed to get qed roce operations\n");
		goto init_err;
	}

	dev->ops = qed_ops;
	rc = qed_ops->fill_dev_info(cdev, &dev_info);
	if (rc)
		goto init_err;

	dev->num_hwfns = dev_info.common.num_hwfns;
	dev->rdma_ctx = dev->ops->rdma_get_rdma_ctx(cdev);

	dev->num_cnq = dev->ops->rdma_get_min_cnq_msix(cdev);
	if (!dev->num_cnq) {
		DP_ERR(dev, "not enough CNQ resources.\n");
		goto init_err;
	}

R
Ram Amrani 已提交
789 790
	dev->wq_multiplier = QEDR_WQ_MULTIPLIER_DFT;

R
Ram Amrani 已提交
791 792
	qedr_pci_set_atomic(dev, pdev);

R
Ram Amrani 已提交
793 794 795 796 797 798 799 800 801 802 803 804
	rc = qedr_alloc_resources(dev);
	if (rc)
		goto init_err;

	rc = qedr_init_hw(dev);
	if (rc)
		goto alloc_err;

	rc = qedr_setup_irqs(dev);
	if (rc)
		goto irq_err;

R
Ram Amrani 已提交
805 806 807
	rc = qedr_register_device(dev);
	if (rc) {
		DP_ERR(dev, "Unable to allocate register device\n");
R
Ram Amrani 已提交
808
		goto reg_err;
R
Ram Amrani 已提交
809 810 811 812
	}

	for (i = 0; i < ARRAY_SIZE(qedr_attributes); i++)
		if (device_create_file(&dev->ibdev.dev, qedr_attributes[i]))
813
			goto sysfs_err;
R
Ram Amrani 已提交
814

815 816 817
	if (!test_and_set_bit(QEDR_ENET_STATE_BIT, &dev->enet_state))
		qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_PORT_ACTIVE);

R
Ram Amrani 已提交
818 819 820
	DP_DEBUG(dev, QEDR_MSG_INIT, "qedr driver loaded successfully\n");
	return dev;

821 822
sysfs_err:
	ib_unregister_device(&dev->ibdev);
R
Ram Amrani 已提交
823 824 825 826 827 828
reg_err:
	qedr_sync_free_irqs(dev);
irq_err:
	qedr_stop_hw(dev);
alloc_err:
	qedr_free_resources(dev);
R
Ram Amrani 已提交
829 830 831 832 833 834 835 836 837 838 839 840 841
init_err:
	ib_dealloc_device(&dev->ibdev);
	DP_ERR(dev, "qedr driver load failed rc=%d\n", rc);

	return NULL;
}

static void qedr_remove(struct qedr_dev *dev)
{
	/* First unregister with stack to stop all the active traffic
	 * of the registered clients.
	 */
	qedr_remove_sysfiles(dev);
842
	ib_unregister_device(&dev->ibdev);
R
Ram Amrani 已提交
843

R
Ram Amrani 已提交
844 845 846
	qedr_stop_hw(dev);
	qedr_sync_free_irqs(dev);
	qedr_free_resources(dev);
R
Ram Amrani 已提交
847 848 849
	ib_dealloc_device(&dev->ibdev);
}

850
static void qedr_close(struct qedr_dev *dev)
R
Ram Amrani 已提交
851
{
852 853
	if (test_and_clear_bit(QEDR_ENET_STATE_BIT, &dev->enet_state))
		qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_PORT_ERR);
R
Ram Amrani 已提交
854 855 856 857 858 859 860 861
}

static void qedr_shutdown(struct qedr_dev *dev)
{
	qedr_close(dev);
	qedr_remove(dev);
}

862 863 864 865 866 867
static void qedr_open(struct qedr_dev *dev)
{
	if (!test_and_set_bit(QEDR_ENET_STATE_BIT, &dev->enet_state))
		qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_PORT_ACTIVE);
}

R
Ram Amrani 已提交
868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
static void qedr_mac_address_change(struct qedr_dev *dev)
{
	union ib_gid *sgid = &dev->sgid_tbl[0];
	u8 guid[8], mac_addr[6];
	int rc;

	/* Update SGID */
	ether_addr_copy(&mac_addr[0], dev->ndev->dev_addr);
	guid[0] = mac_addr[0] ^ 2;
	guid[1] = mac_addr[1];
	guid[2] = mac_addr[2];
	guid[3] = 0xff;
	guid[4] = 0xfe;
	guid[5] = mac_addr[3];
	guid[6] = mac_addr[4];
	guid[7] = mac_addr[5];
	sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
	memcpy(&sgid->raw[8], guid, sizeof(guid));

	/* Update LL2 */
M
Michal Kalderon 已提交
888 889 890
	rc = dev->ops->ll2_set_mac_filter(dev->cdev,
					  dev->gsi_ll2_mac_address,
					  dev->ndev->dev_addr);
R
Ram Amrani 已提交
891 892 893

	ether_addr_copy(dev->gsi_ll2_mac_address, dev->ndev->dev_addr);

894
	qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_GID_CHANGE);
R
Ram Amrani 已提交
895 896 897 898 899

	if (rc)
		DP_ERR(dev, "Error updating mac filter\n");
}

R
Ram Amrani 已提交
900 901 902 903
/* event handling via NIC driver ensures that all the NIC specific
 * initialization done before RoCE driver notifies
 * event to stack.
 */
904
static void qedr_notify(struct qedr_dev *dev, enum qede_rdma_event event)
R
Ram Amrani 已提交
905 906 907
{
	switch (event) {
	case QEDE_UP:
908
		qedr_open(dev);
R
Ram Amrani 已提交
909 910 911 912 913 914 915 916
		break;
	case QEDE_DOWN:
		qedr_close(dev);
		break;
	case QEDE_CLOSE:
		qedr_shutdown(dev);
		break;
	case QEDE_CHANGE_ADDR:
R
Ram Amrani 已提交
917
		qedr_mac_address_change(dev);
R
Ram Amrani 已提交
918 919 920 921 922 923 924 925 926 927 928 929 930 931 932
		break;
	default:
		pr_err("Event not supported\n");
	}
}

static struct qedr_driver qedr_drv = {
	.name = "qedr_driver",
	.add = qedr_add,
	.remove = qedr_remove,
	.notify = qedr_notify,
};

static int __init qedr_init_module(void)
{
933
	return qede_rdma_register_driver(&qedr_drv);
R
Ram Amrani 已提交
934 935 936 937
}

static void __exit qedr_exit_module(void)
{
938
	qede_rdma_unregister_driver(&qedr_drv);
R
Ram Amrani 已提交
939 940 941 942
}

module_init(qedr_init_module);
module_exit(qedr_exit_module);