qed: Implement iWARP initialization, teardown and qp operations

This patch adds iWARP support for flows that have common code
between RoCE and iWARP, such as initialization, teardown and
qp setup verbs: create, destroy, modify, query.
It introduces the iWARP specific files qed_iwarp.[ch] and
iwarp_common.h
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/Makefile

@@ -5,6 +5,6 @@ qed-y := qed_cxt.o qed_dev.o qed_hw.o qed_init_fw_funcs.o qed_init_ops.o \
 	 qed_selftest.o qed_dcbx.o qed_debug.o qed_ptp.o
 qed-$(CONFIG_QED_SRIOV) += qed_sriov.o qed_vf.o
 qed-$(CONFIG_QED_LL2) += qed_ll2.o
-qed-$(CONFIG_QED_RDMA) += qed_roce.o qed_rdma.o
+qed-$(CONFIG_QED_RDMA) += qed_roce.o qed_rdma.o qed_iwarp.o
 qed-$(CONFIG_QED_ISCSI) += qed_iscsi.o qed_ooo.o
 qed-$(CONFIG_QED_FCOE) += qed_fcoe.o

drivers/net/ethernet/qlogic/qed/qed_dev.c

@@ -937,8 +937,15 @@ int qed_resc_alloc(struct qed_dev *cdev)
 		/* EQ */
 		n_eqes = qed_chain_get_capacity(&p_hwfn->p_spq->chain);
 		if (QED_IS_RDMA_PERSONALITY(p_hwfn)) {
+			enum protocol_type rdma_proto;
+
+			if (QED_IS_ROCE_PERSONALITY(p_hwfn))
+				rdma_proto = PROTOCOLID_ROCE;
+			else
+				rdma_proto = PROTOCOLID_IWARP;
+
 			num_cons = qed_cxt_get_proto_cid_count(p_hwfn,
-							       PROTOCOLID_ROCE,
+							       rdma_proto,
 							       NULL) * 2;
 			n_eqes += num_cons + 2 * MAX_NUM_VFS_BB;
 		} else if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {

drivers/net/ethernet/qlogic/qed/qed_hsi.h

@@ -46,6 +46,7 @@
 #include <linux/qed/fcoe_common.h>
 #include <linux/qed/eth_common.h>
 #include <linux/qed/iscsi_common.h>
+#include <linux/qed/iwarp_common.h>
 #include <linux/qed/rdma_common.h>
 #include <linux/qed/roce_common.h>
 #include <linux/qed/qed_fcoe_if.h>

drivers/net/ethernet/qlogic/qed/qed_iwarp.c

+/* QLogic qed NIC Driver
+ * Copyright (c) 2015-2017  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 "qed_cxt.h"
+#include "qed_hw.h"
+#include "qed_rdma.h"
+#include "qed_reg_addr.h"
+#include "qed_sp.h"
+
+#define QED_IWARP_ORD_DEFAULT		32
+#define QED_IWARP_IRD_DEFAULT		32
+#define QED_IWARP_RCV_WND_SIZE_DEF	(256 * 1024)
+#define QED_IWARP_RCV_WND_SIZE_MIN	(64 * 1024)
+#define QED_IWARP_TS_EN			BIT(0)
+#define QED_IWARP_PARAM_CRC_NEEDED	(1)
+#define QED_IWARP_PARAM_P2P		(1)
+
+static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
+				 u8 fw_event_code, u16 echo,
+				 union event_ring_data *data,
+				 u8 fw_return_code);
+
+/* Override devinfo with iWARP specific values */
+void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn)
+{
+	struct qed_rdma_device *dev = p_hwfn->p_rdma_info->dev;
+
+	dev->max_inline = IWARP_REQ_MAX_INLINE_DATA_SIZE;
+	dev->max_qp = min_t(u32,
+			    IWARP_MAX_QPS,
+			    p_hwfn->p_rdma_info->num_qps);
+
+	dev->max_cq = dev->max_qp;
+
+	dev->max_qp_resp_rd_atomic_resc = QED_IWARP_IRD_DEFAULT;
+	dev->max_qp_req_rd_atomic_resc = QED_IWARP_ORD_DEFAULT;
+}
+
+void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
+{
+	p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_TCP;
+	qed_wr(p_hwfn, p_ptt, p_hwfn->rdma_prs_search_reg, 1);
+	p_hwfn->b_rdma_enabled_in_prs = true;
+}
+
+static void qed_iwarp_cid_cleaned(struct qed_hwfn *p_hwfn, u32 cid)
+{
+	cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
+
+	spin_lock_bh(&p_hwfn->p_rdma_info->lock);
+	qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
+	spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
+}
+
+static int qed_iwarp_alloc_cid(struct qed_hwfn *p_hwfn, u32 *cid)
+{
+	int rc;
+
+	spin_lock_bh(&p_hwfn->p_rdma_info->lock);
+	rc = qed_rdma_bmap_alloc_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
+	spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
+	if (rc) {
+		DP_NOTICE(p_hwfn, "Failed in allocating iwarp cid\n");
+		return rc;
+	}
+	*cid += qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);
+
+	rc = qed_cxt_dynamic_ilt_alloc(p_hwfn, QED_ELEM_CXT, *cid);
+	if (rc)
+		qed_iwarp_cid_cleaned(p_hwfn, *cid);
+
+	return rc;
+}
+
+int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
+			struct qed_rdma_qp *qp,
+			struct qed_rdma_create_qp_out_params *out_params)
+{
+	struct iwarp_create_qp_ramrod_data *p_ramrod;
+	struct qed_sp_init_data init_data;
+	struct qed_spq_entry *p_ent;
+	u16 physical_queue;
+	u32 cid;
+	int rc;
+
+	qp->shared_queue = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
+					      IWARP_SHARED_QUEUE_PAGE_SIZE,
+					      &qp->shared_queue_phys_addr,
+					      GFP_KERNEL);
+	if (!qp->shared_queue)
+		return -ENOMEM;
+
+	out_params->sq_pbl_virt = (u8 *)qp->shared_queue +
+	    IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
+	out_params->sq_pbl_phys = qp->shared_queue_phys_addr +
+	    IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
+	out_params->rq_pbl_virt = (u8 *)qp->shared_queue +
+	    IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
+	out_params->rq_pbl_phys = qp->shared_queue_phys_addr +
+	    IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
+
+	rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
+	if (rc)
+		goto err1;
+
+	qp->icid = (u16)cid;
+
+	memset(&init_data, 0, sizeof(init_data));
+	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
+	init_data.cid = qp->icid;
+	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
+
+	rc = qed_sp_init_request(p_hwfn, &p_ent,
+				 IWARP_RAMROD_CMD_ID_CREATE_QP,
+				 PROTOCOLID_IWARP, &init_data);
+	if (rc)
+		goto err2;
+
+	p_ramrod = &p_ent->ramrod.iwarp_create_qp;
+
+	SET_FIELD(p_ramrod->flags,
+		  IWARP_CREATE_QP_RAMROD_DATA_FMR_AND_RESERVED_EN,
+		  qp->fmr_and_reserved_lkey);
+
+	SET_FIELD(p_ramrod->flags,
+		  IWARP_CREATE_QP_RAMROD_DATA_SIGNALED_COMP, qp->signal_all);
+
+	SET_FIELD(p_ramrod->flags,
+		  IWARP_CREATE_QP_RAMROD_DATA_RDMA_RD_EN,
+		  qp->incoming_rdma_read_en);
+
+	SET_FIELD(p_ramrod->flags,
+		  IWARP_CREATE_QP_RAMROD_DATA_RDMA_WR_EN,
+		  qp->incoming_rdma_write_en);
+
+	SET_FIELD(p_ramrod->flags,
+		  IWARP_CREATE_QP_RAMROD_DATA_ATOMIC_EN,
+		  qp->incoming_atomic_en);
+
+	SET_FIELD(p_ramrod->flags,
+		  IWARP_CREATE_QP_RAMROD_DATA_SRQ_FLG, qp->use_srq);
+
+	p_ramrod->pd = qp->pd;
+	p_ramrod->sq_num_pages = qp->sq_num_pages;
+	p_ramrod->rq_num_pages = qp->rq_num_pages;
+
+	p_ramrod->qp_handle_for_cqe.hi = cpu_to_le32(qp->qp_handle.hi);
+	p_ramrod->qp_handle_for_cqe.lo = cpu_to_le32(qp->qp_handle.lo);
+
+	p_ramrod->cq_cid_for_sq =
+	    cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->sq_cq_id);
+	p_ramrod->cq_cid_for_rq =
+	    cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->rq_cq_id);
+
+	p_ramrod->dpi = cpu_to_le16(qp->dpi);
+
+	physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
+	p_ramrod->physical_q0 = cpu_to_le16(physical_queue);
+	physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
+	p_ramrod->physical_q1 = cpu_to_le16(physical_queue);
+
+	rc = qed_spq_post(p_hwfn, p_ent, NULL);
+	if (rc)
+		goto err2;
+
+	return rc;
+
+err2:
+	qed_iwarp_cid_cleaned(p_hwfn, cid);
+err1:
+	dma_free_coherent(&p_hwfn->cdev->pdev->dev,
+			  IWARP_SHARED_QUEUE_PAGE_SIZE,
+			  qp->shared_queue, qp->shared_queue_phys_addr);
+
+	return rc;
+}
+
+static int qed_iwarp_modify_fw(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
+{
+	struct iwarp_modify_qp_ramrod_data *p_ramrod;
+	struct qed_sp_init_data init_data;
+	struct qed_spq_entry *p_ent;
+	int rc;
+
+	/* Get SPQ entry */
+	memset(&init_data, 0, sizeof(init_data));
+	init_data.cid = qp->icid;
+	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
+	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
+
+	rc = qed_sp_init_request(p_hwfn, &p_ent,
+				 IWARP_RAMROD_CMD_ID_MODIFY_QP,
+				 p_hwfn->p_rdma_info->proto, &init_data);
+	if (rc)
+		return rc;
+
+	p_ramrod = &p_ent->ramrod.iwarp_modify_qp;
+	SET_FIELD(p_ramrod->flags, IWARP_MODIFY_QP_RAMROD_DATA_STATE_TRANS_EN,
+		  0x1);
+	if (qp->iwarp_state == QED_IWARP_QP_STATE_CLOSING)
+		p_ramrod->transition_to_state = IWARP_MODIFY_QP_STATE_CLOSING;
+	else
+		p_ramrod->transition_to_state = IWARP_MODIFY_QP_STATE_ERROR;
+
+	rc = qed_spq_post(p_hwfn, p_ent, NULL);
+
+	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x)rc=%d\n", qp->icid, rc);
+
+	return rc;
+}
+
+enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state)
+{
+	switch (state) {
+	case QED_ROCE_QP_STATE_RESET:
+	case QED_ROCE_QP_STATE_INIT:
+	case QED_ROCE_QP_STATE_RTR:
+		return QED_IWARP_QP_STATE_IDLE;
+	case QED_ROCE_QP_STATE_RTS:
+		return QED_IWARP_QP_STATE_RTS;
+	case QED_ROCE_QP_STATE_SQD:
+		return QED_IWARP_QP_STATE_CLOSING;
+	case QED_ROCE_QP_STATE_ERR:
+		return QED_IWARP_QP_STATE_ERROR;
+	case QED_ROCE_QP_STATE_SQE:
+		return QED_IWARP_QP_STATE_TERMINATE;
+	default:
+		return QED_IWARP_QP_STATE_ERROR;
+	}
+}
+
+static enum qed_roce_qp_state
+qed_iwarp2roce_state(enum qed_iwarp_qp_state state)
+{
+	switch (state) {
+	case QED_IWARP_QP_STATE_IDLE:
+		return QED_ROCE_QP_STATE_INIT;
+	case QED_IWARP_QP_STATE_RTS:
+		return QED_ROCE_QP_STATE_RTS;
+	case QED_IWARP_QP_STATE_TERMINATE:
+		return QED_ROCE_QP_STATE_SQE;
+	case QED_IWARP_QP_STATE_CLOSING:
+		return QED_ROCE_QP_STATE_SQD;
+	case QED_IWARP_QP_STATE_ERROR:
+		return QED_ROCE_QP_STATE_ERR;
+	default:
+		return QED_ROCE_QP_STATE_ERR;
+	}
+}
+
+const char *iwarp_state_names[] = {
+	"IDLE",
+	"RTS",
+	"TERMINATE",
+	"CLOSING",
+	"ERROR",
+};
+
+int
+qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn,
+		    struct qed_rdma_qp *qp,
+		    enum qed_iwarp_qp_state new_state, bool internal)
+{
+	enum qed_iwarp_qp_state prev_iw_state;
+	bool modify_fw = false;
+	int rc = 0;
+
+	/* modify QP can be called from upper-layer or as a result of async
+	 * RST/FIN... therefore need to protect
+	 */
+	spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
+	prev_iw_state = qp->iwarp_state;
+
+	if (prev_iw_state == new_state) {
+		spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
+		return 0;
+	}
+
+	switch (prev_iw_state) {
+	case QED_IWARP_QP_STATE_IDLE:
+		switch (new_state) {
+		case QED_IWARP_QP_STATE_RTS:
+			qp->iwarp_state = QED_IWARP_QP_STATE_RTS;
+			break;
+		case QED_IWARP_QP_STATE_ERROR:
+			qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
+			if (!internal)
+				modify_fw = true;
+			break;
+		default:
+			break;
+		}
+		break;
+	case QED_IWARP_QP_STATE_RTS:
+		switch (new_state) {
+		case QED_IWARP_QP_STATE_CLOSING:
+			if (!internal)
+				modify_fw = true;
+
+			qp->iwarp_state = QED_IWARP_QP_STATE_CLOSING;
+			break;
+		case QED_IWARP_QP_STATE_ERROR:
+			if (!internal)
+				modify_fw = true;
+			qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
+			break;
+		default:
+			break;
+		}
+		break;
+	case QED_IWARP_QP_STATE_ERROR:
+		switch (new_state) {
+		case QED_IWARP_QP_STATE_IDLE:
+
+			qp->iwarp_state = new_state;
+			break;
+		case QED_IWARP_QP_STATE_CLOSING:
+			/* could happen due to race... do nothing.... */
+			break;
+		default:
+			rc = -EINVAL;
+		}
+		break;
+	case QED_IWARP_QP_STATE_TERMINATE:
+	case QED_IWARP_QP_STATE_CLOSING:
+		qp->iwarp_state = new_state;
+		break;
+	default:
+		break;
+	}
+
+	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) %s --> %s%s\n",
+		   qp->icid,
+		   iwarp_state_names[prev_iw_state],
+		   iwarp_state_names[qp->iwarp_state],
+		   internal ? "internal" : "");
+
+	spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
+
+	if (modify_fw)
+		rc = qed_iwarp_modify_fw(p_hwfn, qp);
+
+	return rc;
+}
+
+int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
+{
+	struct qed_sp_init_data init_data;
+	struct qed_spq_entry *p_ent;
+	int rc;
+
+	/* Get SPQ entry */
+	memset(&init_data, 0, sizeof(init_data));
+	init_data.cid = qp->icid;
+	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
+	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
+
+	rc = qed_sp_init_request(p_hwfn, &p_ent,
+				 IWARP_RAMROD_CMD_ID_DESTROY_QP,
+				 p_hwfn->p_rdma_info->proto, &init_data);
+	if (rc)
+		return rc;
+
+	rc = qed_spq_post(p_hwfn, p_ent, NULL);
+
+	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) rc = %d\n", qp->icid, rc);
+
+	return rc;
+}
+
+int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
+{
+	int rc = 0;
+
+	if (qp->iwarp_state != QED_IWARP_QP_STATE_ERROR) {
+		rc = qed_iwarp_modify_qp(p_hwfn, qp,
+					 QED_IWARP_QP_STATE_ERROR, false);
+		if (rc)
+			return rc;
+	}
+
+	rc = qed_iwarp_fw_destroy(p_hwfn, qp);
+
+	if (qp->shared_queue)
+		dma_free_coherent(&p_hwfn->cdev->pdev->dev,
+				  IWARP_SHARED_QUEUE_PAGE_SIZE,
+				  qp->shared_queue, qp->shared_queue_phys_addr);
+
+	return rc;
+}
+
+#define QED_IWARP_MAX_CID_CLEAN_TIME  100
+#define QED_IWARP_MAX_NO_PROGRESS_CNT 5
+
+/* This function waits for all the bits of a bmap to be cleared, as long as
+ * there is progress ( i.e. the number of bits left to be cleared decreases )
+ * the function continues.
+ */
+static int
+qed_iwarp_wait_cid_map_cleared(struct qed_hwfn *p_hwfn, struct qed_bmap *bmap)
+{
+	int prev_weight = 0;
+	int wait_count = 0;
+	int weight = 0;
+
+	weight = bitmap_weight(bmap->bitmap, bmap->max_count);
+	prev_weight = weight;
+
+	while (weight) {
+		msleep(QED_IWARP_MAX_CID_CLEAN_TIME);
+
+		weight = bitmap_weight(bmap->bitmap, bmap->max_count);
+
+		if (prev_weight == weight) {
+			wait_count++;
+		} else {
+			prev_weight = weight;
+			wait_count = 0;
+		}
+
+		if (wait_count > QED_IWARP_MAX_NO_PROGRESS_CNT) {
+			DP_NOTICE(p_hwfn,
+				  "%s bitmap wait timed out (%d cids pending)\n",
+				  bmap->name, weight);
+			return -EBUSY;
+		}
+	}
+	return 0;
+}
+
+static int qed_iwarp_wait_for_all_cids(struct qed_hwfn *p_hwfn)
+{
+	/* Now wait for all cids to be completed */
+	return qed_iwarp_wait_cid_map_cleared(p_hwfn,
+					      &p_hwfn->p_rdma_info->cid_map);
+}
+
+int qed_iwarp_alloc(struct qed_hwfn *p_hwfn)
+{
+	spin_lock_init(&p_hwfn->p_rdma_info->iwarp.iw_lock);
+
+	return 0;
+}
+
+void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn)
+{
+}
+
+int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
+		    struct qed_rdma_start_in_params *params)
+{
+	struct qed_iwarp_info *iwarp_info;
+	u32 rcv_wnd_size;
+	int rc = 0;
+
+	iwarp_info = &p_hwfn->p_rdma_info->iwarp;
+
+	iwarp_info->tcp_flags = QED_IWARP_TS_EN;
+	rcv_wnd_size = QED_IWARP_RCV_WND_SIZE_DEF;
+
+	/* value 0 is used for ilog2(QED_IWARP_RCV_WND_SIZE_MIN) */
+	iwarp_info->rcv_wnd_scale = ilog2(rcv_wnd_size) -
+	    ilog2(QED_IWARP_RCV_WND_SIZE_MIN);
+	iwarp_info->crc_needed = QED_IWARP_PARAM_CRC_NEEDED;
+	iwarp_info->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
+
+	iwarp_info->peer2peer = QED_IWARP_PARAM_P2P;
+
+	spin_lock_init(&p_hwfn->p_rdma_info->iwarp.qp_lock);
+
+	qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
+				  qed_iwarp_async_event);
+
+	return rc;
+}
+
+int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
+{
+	int rc;
+
+	rc = qed_iwarp_wait_for_all_cids(p_hwfn);
+	if (rc)
+		return rc;
+
+	qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_IWARP);
+
+	return 0;
+}
+
+static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
+				 u8 fw_event_code, u16 echo,
+				 union event_ring_data *data,
+				 u8 fw_return_code)
+{
+	return 0;
+}
+
+void
+qed_iwarp_query_qp(struct qed_rdma_qp *qp,
+		   struct qed_rdma_query_qp_out_params *out_params)
+{
+	out_params->state = qed_iwarp2roce_state(qp->iwarp_state);
+}

drivers/net/ethernet/qlogic/qed/qed_iwarp.h

+/* QLogic qed NIC Driver
+ * Copyright (c) 2015-2017  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.
+ */
+#ifndef _QED_IWARP_H
+#define _QED_IWARP_H
+
+enum qed_iwarp_qp_state {
+	QED_IWARP_QP_STATE_IDLE,
+	QED_IWARP_QP_STATE_RTS,
+	QED_IWARP_QP_STATE_TERMINATE,
+	QED_IWARP_QP_STATE_CLOSING,
+	QED_IWARP_QP_STATE_ERROR,
+};
+
+enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state);
+
+struct qed_iwarp_info {
+	spinlock_t iw_lock;	/* for iwarp resources */
+	spinlock_t qp_lock;	/* for teardown races */
+	u32 rcv_wnd_scale;
+	u16 max_mtu;
+	u8 mac_addr[ETH_ALEN];
+	u8 crc_needed;
+	u8 tcp_flags;
+	u8 peer2peer;
+	enum mpa_negotiation_mode mpa_rev;
+	enum mpa_rtr_type rtr_type;
+};
+
+int qed_iwarp_alloc(struct qed_hwfn *p_hwfn);
+
+int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
+		    struct qed_rdma_start_in_params *params);
+
+int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
+
+void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn);
+
+void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn);
+
+void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
+
+int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
+			struct qed_rdma_qp *qp,
+			struct qed_rdma_create_qp_out_params *out_params);
+
+int qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp,
+			enum qed_iwarp_qp_state new_state, bool internal);
+
+int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);
+
+int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);
+
+void qed_iwarp_query_qp(struct qed_rdma_qp *qp,
+			struct qed_rdma_query_qp_out_params *out_params);
+
+#endif

drivers/net/ethernet/qlogic/qed/qed_rdma.c

@@ -161,7 +161,10 @@ static int qed_rdma_alloc(struct qed_hwfn *p_hwfn,
 	num_cons = qed_cxt_get_proto_cid_count(p_hwfn, p_rdma_info->proto,
 					       NULL);
 
-	p_rdma_info->num_qps = num_cons / 2;
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		p_rdma_info->num_qps = num_cons;
+	else
+		p_rdma_info->num_qps = num_cons / 2; /* 2 cids per qp */
 
 	num_tasks = qed_cxt_get_proto_tid_count(p_hwfn, PROTOCOLID_ROCE);
 
@@ -252,6 +255,13 @@ static int qed_rdma_alloc(struct qed_hwfn *p_hwfn,
 			   "Failed to allocate real cid bitmap, rc = %d\n", rc);
 		goto free_cid_map;
 	}
+
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		rc = qed_iwarp_alloc(p_hwfn);
+
+	if (rc)
+		goto free_cid_map;
+
 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Allocation successful\n");
 	return 0;
 
@@ -329,6 +339,9 @@ static void qed_rdma_resc_free(struct qed_hwfn *p_hwfn)
 {
 	struct qed_rdma_info *p_rdma_info = p_hwfn->p_rdma_info;
 
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		qed_iwarp_resc_free(p_hwfn);
+
 	qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->cid_map, 1);
 	qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->pd_map, 1);
 	qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->dpi_map, 1);
@@ -470,6 +483,9 @@ static void qed_rdma_init_devinfo(struct qed_hwfn *p_hwfn,
 
 	if (pci_status_control & PCI_EXP_DEVCTL2_LTR_EN)
 		SET_FIELD(dev->dev_caps, QED_RDMA_DEV_CAP_ATOMIC_OP, 1);
+
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		qed_iwarp_init_devinfo(p_hwfn);
 }
 
 static void qed_rdma_init_port(struct qed_hwfn *p_hwfn)
@@ -490,29 +506,17 @@ static void qed_rdma_init_port(struct qed_hwfn *p_hwfn)
 
 static int qed_rdma_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 {
-	u32 ll2_ethertype_en;
+	int rc = 0;
 
 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Initializing HW\n");
 	p_hwfn->b_rdma_enabled_in_prs = false;
 
-	qed_wr(p_hwfn, p_ptt, PRS_REG_ROCE_DEST_QP_MAX_PF, 0);
-
-	p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_ROCE;
-
-	/* We delay writing to this reg until first cid is allocated. See
-	 * qed_cxt_dynamic_ilt_alloc function for more details
-	 */
-	ll2_ethertype_en = qed_rd(p_hwfn, p_ptt, PRS_REG_LIGHT_L2_ETHERTYPE_EN);
-	qed_wr(p_hwfn, p_ptt, PRS_REG_LIGHT_L2_ETHERTYPE_EN,
-	       (ll2_ethertype_en | 0x01));
-
-	if (qed_cxt_get_proto_cid_start(p_hwfn, PROTOCOLID_ROCE) % 2) {
-		DP_NOTICE(p_hwfn, "The first RoCE's cid should be even\n");
-		return -EINVAL;
-	}
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		qed_iwarp_init_hw(p_hwfn, p_ptt);
+	else
+		rc = qed_roce_init_hw(p_hwfn, p_ptt);
 
-	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Initializing HW - Done\n");
-	return 0;
+	return rc;
 }
 
 static int qed_rdma_start_fw(struct qed_hwfn *p_hwfn,
@@ -544,6 +548,9 @@ static int qed_rdma_start_fw(struct qed_hwfn *p_hwfn,
 	if (rc)
 		return rc;
 
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		p_ramrod = &p_ent->ramrod.iwarp_init_func.rdma;
+	else
 		p_ramrod = &p_ent->ramrod.roce_init_func.rdma;
 
 	p_params_header = &p_ramrod->params_header;
@@ -641,7 +648,15 @@ static int qed_rdma_setup(struct qed_hwfn *p_hwfn,
 	if (rc)
 		return rc;
 
-	qed_roce_setup(p_hwfn);
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn)) {
+		rc = qed_iwarp_setup(p_hwfn, p_ptt, params);
+		if (rc)
+			return rc;
+	} else {
+		rc = qed_roce_setup(p_hwfn);
+		if (rc)
+			return rc;
+	}
 
 	return qed_rdma_start_fw(p_hwfn, params, p_ptt);
 }
@@ -675,7 +690,16 @@ int qed_rdma_stop(void *rdma_cxt)
 	qed_wr(p_hwfn, p_ptt, PRS_REG_LIGHT_L2_ETHERTYPE_EN,
 	       (ll2_ethertype_en & 0xFFFE));
 
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn)) {
+		rc = qed_iwarp_stop(p_hwfn, p_ptt);
+		if (rc) {
+			qed_ptt_release(p_hwfn, p_ptt);
+			return rc;
+		}
+	} else {
 		qed_roce_stop(p_hwfn);
+	}
+
 	qed_ptt_release(p_hwfn, p_ptt);
 
 	/* Get SPQ entry */
@@ -810,7 +834,9 @@ static int qed_fill_rdma_dev_info(struct qed_dev *cdev,
 
 	memset(info, 0, sizeof(*info));
 
-	info->rdma_type = QED_RDMA_TYPE_ROCE;
+	info->rdma_type = QED_IS_ROCE_PERSONALITY(p_hwfn) ?
+	    QED_RDMA_TYPE_ROCE : QED_RDMA_TYPE_IWARP;
+
 	info->user_dpm_enabled = (p_hwfn->db_bar_no_edpm == 0);
 
 	qed_fill_dev_info(cdev, &info->common);
@@ -1112,7 +1138,7 @@ static int qed_rdma_query_qp(void *rdma_cxt,
 			     struct qed_rdma_query_qp_out_params *out_params)
 {
 	struct qed_hwfn *p_hwfn = (struct qed_hwfn *)rdma_cxt;
-	int rc;
+	int rc = 0;
 
 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "icid = %08x\n", qp->icid);
 
@@ -1138,6 +1164,9 @@ static int qed_rdma_query_qp(void *rdma_cxt,
 	out_params->max_dest_rd_atomic = qp->max_rd_atomic_resp;
 	out_params->sqd_async = qp->sqd_async;
 
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		qed_iwarp_query_qp(qp, out_params);
+	else
 		rc = qed_roce_query_qp(p_hwfn, qp, out_params);
 
 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Query QP, rc = %d\n", rc);
@@ -1151,6 +1180,9 @@ static int qed_rdma_destroy_qp(void *rdma_cxt, struct qed_rdma_qp *qp)
 
 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "icid = %08x\n", qp->icid);
 
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+		rc = qed_iwarp_destroy_qp(p_hwfn, qp);
+	else
 		rc = qed_roce_destroy_qp(p_hwfn, qp);
 
 	/* free qp params struct */
@@ -1190,19 +1222,26 @@ qed_rdma_create_qp(void *rdma_cxt,
 		return NULL;
 	}
 
-	qp = kzalloc(sizeof(*qp), GFP_KERNEL);
-	if (!qp)
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn)) {
+		if (in_params->sq_num_pages * sizeof(struct regpair) >
+		    IWARP_SHARED_QUEUE_PAGE_SQ_PBL_MAX_SIZE) {
+			DP_NOTICE(p_hwfn->cdev,
+				  "Sq num pages: %d exceeds maximum\n",
+				  in_params->sq_num_pages);
 			return NULL;
-
-	rc = qed_roce_alloc_cid(p_hwfn, &qp->icid);
-	qp->qpid = ((0xFF << 16) | qp->icid);
-
-	DP_INFO(p_hwfn, "ROCE qpid=%x\n", qp->qpid);
-
-	if (rc) {
-		kfree(qp);
+		}
+		if (in_params->rq_num_pages * sizeof(struct regpair) >
+		    IWARP_SHARED_QUEUE_PAGE_RQ_PBL_MAX_SIZE) {
+			DP_NOTICE(p_hwfn->cdev,
+				  "Rq num pages: %d exceeds maximum\n",
+				  in_params->rq_num_pages);
 			return NULL;
 		}
+	}
+
+	qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+	if (!qp)
+		return NULL;
 
 	qp->cur_state = QED_ROCE_QP_STATE_RESET;
 	qp->qp_handle.hi = cpu_to_le32(in_params->qp_handle_hi);
@@ -1226,6 +1265,19 @@ qed_rdma_create_qp(void *rdma_cxt,
 	qp->e2e_flow_control_en = qp->use_srq ? false : true;
 	qp->stats_queue = in_params->stats_queue;
 
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn)) {
+		rc = qed_iwarp_create_qp(p_hwfn, qp, out_params);
+		qp->qpid = qp->icid;
+	} else {
+		rc = qed_roce_alloc_cid(p_hwfn, &qp->icid);
+		qp->qpid = ((0xFF << 16) | qp->icid);
+	}
+
+	if (rc) {
+		kfree(qp);
+		return NULL;
+	}
+
 	out_params->icid = qp->icid;
 	out_params->qp_id = qp->qpid;
 
@@ -1324,7 +1376,14 @@ static int qed_rdma_modify_qp(void *rdma_cxt,
 			   qp->cur_state);
 	}
 
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn)) {
+		enum qed_iwarp_qp_state new_state =
+		    qed_roce2iwarp_state(qp->cur_state);
+
+		rc = qed_iwarp_modify_qp(p_hwfn, qp, new_state, 0);
+	} else {
 		rc = qed_roce_modify_qp(p_hwfn, qp, prev_state, params);
+	}
 
 	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Modify QP, rc = %d\n", rc);
 	return rc;

drivers/net/ethernet/qlogic/qed/qed_rdma.h

@@ -42,6 +42,7 @@
 #include "qed.h"
 #include "qed_dev_api.h"
 #include "qed_hsi.h"
+#include "qed_iwarp.h"
 #include "qed_roce.h"
 
 #define QED_RDMA_MAX_FMR                    (RDMA_MAX_TIDS)
@@ -97,6 +98,7 @@ struct qed_rdma_info {
 	u16 queue_zone_base;
 	u16 max_queue_zones;
 	enum protocol_type proto;
+	struct qed_iwarp_info iwarp;
 };
 
 struct qed_rdma_qp {
@@ -105,6 +107,7 @@ struct qed_rdma_qp {
 	u32 qpid;
 	u16 icid;
 	enum qed_roce_qp_state cur_state;
+	enum qed_iwarp_qp_state iwarp_state;
 	bool use_srq;
 	bool signal_all;
 	bool fmr_and_reserved_lkey;

drivers/net/ethernet/qlogic/qed/qed_roce.c

@@ -1149,3 +1149,23 @@ int qed_roce_setup(struct qed_hwfn *p_hwfn)
 					 qed_roce_async_event);
 }
 
+int qed_roce_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
+{
+	u32 ll2_ethertype_en;
+
+	qed_wr(p_hwfn, p_ptt, PRS_REG_ROCE_DEST_QP_MAX_PF, 0);
+
+	p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_ROCE;
+
+	ll2_ethertype_en = qed_rd(p_hwfn, p_ptt, PRS_REG_LIGHT_L2_ETHERTYPE_EN);
+	qed_wr(p_hwfn, p_ptt, PRS_REG_LIGHT_L2_ETHERTYPE_EN,
+	       (ll2_ethertype_en | 0x01));
+
+	if (qed_cxt_get_proto_cid_start(p_hwfn, PROTOCOLID_ROCE) % 2) {
+		DP_NOTICE(p_hwfn, "The first RoCE's cid should be even\n");
+		return -EINVAL;
+	}
+
+	DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Initializing HW - Done\n");
+	return 0;
+}

drivers/net/ethernet/qlogic/qed/qed_sp.h

@@ -104,12 +104,15 @@ union ramrod_data {
 	struct roce_query_qp_req_ramrod_data roce_query_qp_req;
 	struct roce_destroy_qp_resp_ramrod_data roce_destroy_qp_resp;
 	struct roce_destroy_qp_req_ramrod_data roce_destroy_qp_req;
+	struct roce_init_func_ramrod_data roce_init_func;
 	struct rdma_create_cq_ramrod_data rdma_create_cq;
 	struct rdma_destroy_cq_ramrod_data rdma_destroy_cq;
 	struct rdma_srq_create_ramrod_data rdma_create_srq;
 	struct rdma_srq_destroy_ramrod_data rdma_destroy_srq;
 	struct rdma_srq_modify_ramrod_data rdma_modify_srq;
-	struct roce_init_func_ramrod_data roce_init_func;
+	struct iwarp_create_qp_ramrod_data iwarp_create_qp;
+	struct iwarp_modify_qp_ramrod_data iwarp_modify_qp;
+	struct iwarp_init_func_ramrod_data iwarp_init_func;
 	struct fcoe_init_ramrod_params fcoe_init;
 	struct fcoe_conn_offload_ramrod_params fcoe_conn_ofld;
 	struct fcoe_conn_terminate_ramrod_params fcoe_conn_terminate;

include/linux/qed/iwarp_common.h

+/* QLogic qed NIC Driver
+ * Copyright (c) 2015-2017  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.
+ */
+#ifndef __IWARP_COMMON__
+#define __IWARP_COMMON__
+#include <linux/qed/rdma_common.h>
+/************************/
+/* IWARP FW CONSTANTS	*/
+/************************/
+
+#define IWARP_ACTIVE_MODE 0
+#define IWARP_PASSIVE_MODE 1
+
+#define IWARP_SHARED_QUEUE_PAGE_SIZE		(0x8000)
+#define IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET   (0x4000)
+#define IWARP_SHARED_QUEUE_PAGE_RQ_PBL_MAX_SIZE (0x1000)
+#define IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET   (0x5000)
+#define IWARP_SHARED_QUEUE_PAGE_SQ_PBL_MAX_SIZE (0x3000)
+
+#define IWARP_REQ_MAX_INLINE_DATA_SIZE          (128)
+#define IWARP_REQ_MAX_SINGLE_SQ_WQE_SIZE        (176)
+
+#define IWARP_MAX_QPS                           (64 * 1024)
+
+#endif /* __IWARP_COMMON__ */

include/linux/qed/qed_rdma_if.h

@@ -491,6 +491,7 @@ struct qed_roce_ll2_packet {
 
 enum qed_rdma_type {
 	QED_RDMA_TYPE_ROCE,
+	QED_RDMA_TYPE_IWARP
 };
 
 struct qed_dev_rdma_info {