drivers/infiniband/hw/cxgb3/iwch_ev.c - kernel/quantenna - Git at Google

 /*
  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
  *
  * 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/gfp.h>
 #include <linux/mman.h>
 #include <net/sock.h>
 #include "iwch_provider.h"
 #include "iwch.h"
 #include "iwch_cm.h"
 #include "cxio_hal.h"
 #include "cxio_wr.h"

 static void post_qp_event(struct iwch_dev *rnicp, struct iwch_cq *chp,
 			  struct respQ_msg_t *rsp_msg,
 			  enum ib_event_type ib_event,
 			  int send_term)
 {
 	struct ib_event event;
 	struct iwch_qp_attributes attrs;
 	struct iwch_qp *qhp;
 	unsigned long flag;

 	spin_lock(&rnicp->lock);
 	qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));

 	if (!qhp) {
 		printk(KERN_ERR "%s unaffiliated error 0x%x qpid 0x%x\n",
 		       __func__, CQE_STATUS(rsp_msg->cqe),
 		       CQE_QPID(rsp_msg->cqe));
 		spin_unlock(&rnicp->lock);
 		return;
 	}

 	if ((qhp->attr.state == IWCH_QP_STATE_ERROR) ||
 	    (qhp->attr.state == IWCH_QP_STATE_TERMINATE)) {
 		PDBG("%s AE received after RTS - "
 		     "qp state %d qpid 0x%x status 0x%x\n", __func__,
 		     qhp->attr.state, qhp->wq.qpid, CQE_STATUS(rsp_msg->cqe));
 		spin_unlock(&rnicp->lock);
 		return;
 	}

 	printk(KERN_ERR "%s - AE qpid 0x%x opcode %d status 0x%x "
 	       "type %d wrid.hi 0x%x wrid.lo 0x%x \n", __func__,
 	       CQE_QPID(rsp_msg->cqe), CQE_OPCODE(rsp_msg->cqe),
 	       CQE_STATUS(rsp_msg->cqe), CQE_TYPE(rsp_msg->cqe),
 	       CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));

 	atomic_inc(&qhp->refcnt);
 	spin_unlock(&rnicp->lock);

 	if (qhp->attr.state == IWCH_QP_STATE_RTS) {
 		attrs.next_state = IWCH_QP_STATE_TERMINATE;
 		iwch_modify_qp(qhp->rhp, qhp, IWCH_QP_ATTR_NEXT_STATE,
 			       &attrs, 1);
 		if (send_term)
 			iwch_post_terminate(qhp, rsp_msg);
 	}

 	event.event = ib_event;
 	event.device = chp->ibcq.device;
 	if (ib_event == IB_EVENT_CQ_ERR)
 		event.element.cq = &chp->ibcq;
 	else
 		event.element.qp = &qhp->ibqp;

 	if (qhp->ibqp.event_handler)
 		(*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);

 	spin_lock_irqsave(&chp->comp_handler_lock, flag);
 	(*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 	spin_unlock_irqrestore(&chp->comp_handler_lock, flag);

 	if (atomic_dec_and_test(&qhp->refcnt))
 		wake_up(&qhp->wait);
 }

 void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb)
 {
 	struct iwch_dev *rnicp;
 	struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
 	struct iwch_cq *chp;
 	struct iwch_qp *qhp;
 	u32 cqid = RSPQ_CQID(rsp_msg);
 	unsigned long flag;

 	rnicp = (struct iwch_dev *) rdev_p->ulp;
 	spin_lock(&rnicp->lock);
 	chp = get_chp(rnicp, cqid);
 	qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
 	if (!chp || !qhp) {
 		printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d "
 		       "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x \n",
 		       cqid, CQE_QPID(rsp_msg->cqe),
 		       CQE_OPCODE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
 		       CQE_TYPE(rsp_msg->cqe), CQE_WRID_HI(rsp_msg->cqe),
 		       CQE_WRID_LOW(rsp_msg->cqe));
 		spin_unlock(&rnicp->lock);
 		goto out;
 	}
 	iwch_qp_add_ref(&qhp->ibqp);
 	atomic_inc(&chp->refcnt);
 	spin_unlock(&rnicp->lock);

 	/*
 	 * 1) completion of our sending a TERMINATE.
 	 * 2) incoming TERMINATE message.
 	 */
 	if ((CQE_OPCODE(rsp_msg->cqe) == T3_TERMINATE) &&
 	    (CQE_STATUS(rsp_msg->cqe) == 0)) {
 		if (SQ_TYPE(rsp_msg->cqe)) {
 			PDBG("%s QPID 0x%x ep %p disconnecting\n",
 			     __func__, qhp->wq.qpid, qhp->ep);
 			iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
 		} else {
 			PDBG("%s post REQ_ERR AE QPID 0x%x\n", __func__,
 			     qhp->wq.qpid);
 			post_qp_event(rnicp, chp, rsp_msg,
 				      IB_EVENT_QP_REQ_ERR, 0);
 			iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
 		}
 		goto done;
 	}

 	/* Bad incoming Read request */
 	if (SQ_TYPE(rsp_msg->cqe) &&
 	    (CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP)) {
 		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
 		goto done;
 	}

 	/* Bad incoming write */
 	if (RQ_TYPE(rsp_msg->cqe) &&
 	    (CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)) {
 		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
 		goto done;
 	}

 	switch (CQE_STATUS(rsp_msg->cqe)) {

 	/* Completion Events */
 	case TPT_ERR_SUCCESS:

 		/*
 		 * Confirm the destination entry if this is a RECV completion.
 		 */
 		if (qhp->ep && SQ_TYPE(rsp_msg->cqe))
 			dst_confirm(qhp->ep->dst);
 		spin_lock_irqsave(&chp->comp_handler_lock, flag);
 		(*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 		spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
 		break;

 	case TPT_ERR_STAG:
 	case TPT_ERR_PDID:
 	case TPT_ERR_QPID:
 	case TPT_ERR_ACCESS:
 	case TPT_ERR_WRAP:
 	case TPT_ERR_BOUND:
 	case TPT_ERR_INVALIDATE_SHARED_MR:
 	case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_ACCESS_ERR, 1);
 		break;

 	/* Device Fatal Errors */
 	case TPT_ERR_ECC:
 	case TPT_ERR_ECC_PSTAG:
 	case TPT_ERR_INTERNAL_ERR:
 		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_DEVICE_FATAL, 1);
 		break;

 	/* QP Fatal Errors */
 	case TPT_ERR_OUT_OF_RQE:
 	case TPT_ERR_PBL_ADDR_BOUND:
 	case TPT_ERR_CRC:
 	case TPT_ERR_MARKER:
 	case TPT_ERR_PDU_LEN_ERR:
 	case TPT_ERR_DDP_VERSION:
 	case TPT_ERR_RDMA_VERSION:
 	case TPT_ERR_OPCODE:
 	case TPT_ERR_DDP_QUEUE_NUM:
 	case TPT_ERR_MSN:
 	case TPT_ERR_TBIT:
 	case TPT_ERR_MO:
 	case TPT_ERR_MSN_GAP:
 	case TPT_ERR_MSN_RANGE:
 	case TPT_ERR_RQE_ADDR_BOUND:
 	case TPT_ERR_IRD_OVERFLOW:
 		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
 		break;

 	default:
 		printk(KERN_ERR MOD "Unknown T3 status 0x%x QPID 0x%x\n",
 		       CQE_STATUS(rsp_msg->cqe), qhp->wq.qpid);
 		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
 		break;
 	}
 done:
 	if (atomic_dec_and_test(&chp->refcnt))
 	        wake_up(&chp->wait);
 	iwch_qp_rem_ref(&qhp->ibqp);
 out:
 	dev_kfree_skb_irq(skb);
 }
	/*
	* Copyright (c) 2006 Chelsio, Inc. All rights reserved.
	*
	* 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/gfp.h>
	#include <linux/mman.h>
	#include <net/sock.h>
	#include "iwch_provider.h"
	#include "iwch.h"
	#include "iwch_cm.h"
	#include "cxio_hal.h"
	#include "cxio_wr.h"

	static void post_qp_event(struct iwch_dev rnicp, struct iwch_cq chp,
	struct respQ_msg_t *rsp_msg,
	enum ib_event_type ib_event,
	int send_term)
	{
	struct ib_event event;
	struct iwch_qp_attributes attrs;
	struct iwch_qp *qhp;
	unsigned long flag;

	spin_lock(&rnicp->lock);
	qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));

	if (!qhp) {
	printk(KERN_ERR "%s unaffiliated error 0x%x qpid 0x%x\n",
	__func__, CQE_STATUS(rsp_msg->cqe),
	CQE_QPID(rsp_msg->cqe));
	spin_unlock(&rnicp->lock);
	return;
	}

	if ((qhp->attr.state == IWCH_QP_STATE_ERROR) \|\|
	(qhp->attr.state == IWCH_QP_STATE_TERMINATE)) {
	PDBG("%s AE received after RTS - "
	"qp state %d qpid 0x%x status 0x%x\n", __func__,
	qhp->attr.state, qhp->wq.qpid, CQE_STATUS(rsp_msg->cqe));
	spin_unlock(&rnicp->lock);
	return;
	}

	printk(KERN_ERR "%s - AE qpid 0x%x opcode %d status 0x%x "
	"type %d wrid.hi 0x%x wrid.lo 0x%x \n", __func__,
	CQE_QPID(rsp_msg->cqe), CQE_OPCODE(rsp_msg->cqe),
	CQE_STATUS(rsp_msg->cqe), CQE_TYPE(rsp_msg->cqe),
	CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));

	atomic_inc(&qhp->refcnt);
	spin_unlock(&rnicp->lock);

	if (qhp->attr.state == IWCH_QP_STATE_RTS) {
	attrs.next_state = IWCH_QP_STATE_TERMINATE;
	iwch_modify_qp(qhp->rhp, qhp, IWCH_QP_ATTR_NEXT_STATE,
	&attrs, 1);
	if (send_term)
	iwch_post_terminate(qhp, rsp_msg);
	}

	event.event = ib_event;
	event.device = chp->ibcq.device;
	if (ib_event == IB_EVENT_CQ_ERR)
	event.element.cq = &chp->ibcq;
	else
	event.element.qp = &qhp->ibqp;

	if (qhp->ibqp.event_handler)
	(*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);

	spin_lock_irqsave(&chp->comp_handler_lock, flag);
	(*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
	spin_unlock_irqrestore(&chp->comp_handler_lock, flag);

	if (atomic_dec_and_test(&qhp->refcnt))
	wake_up(&qhp->wait);
	}

	void iwch_ev_dispatch(struct cxio_rdev rdev_p, struct sk_buff skb)
	{
	struct iwch_dev *rnicp;
	struct respQ_msg_t rsp_msg = (struct respQ_msg_t ) skb->data;
	struct iwch_cq *chp;
	struct iwch_qp *qhp;
	u32 cqid = RSPQ_CQID(rsp_msg);
	unsigned long flag;

	rnicp = (struct iwch_dev *) rdev_p->ulp;
	spin_lock(&rnicp->lock);
	chp = get_chp(rnicp, cqid);
	qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
	if (!chp \|\| !qhp) {
	printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d "
	"status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x \n",
	cqid, CQE_QPID(rsp_msg->cqe),
	CQE_OPCODE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
	CQE_TYPE(rsp_msg->cqe), CQE_WRID_HI(rsp_msg->cqe),
	CQE_WRID_LOW(rsp_msg->cqe));
	spin_unlock(&rnicp->lock);
	goto out;
	}
	iwch_qp_add_ref(&qhp->ibqp);
	atomic_inc(&chp->refcnt);
	spin_unlock(&rnicp->lock);

	/*
	* 1) completion of our sending a TERMINATE.
	* 2) incoming TERMINATE message.
	*/
	if ((CQE_OPCODE(rsp_msg->cqe) == T3_TERMINATE) &&
	(CQE_STATUS(rsp_msg->cqe) == 0)) {
	if (SQ_TYPE(rsp_msg->cqe)) {
	PDBG("%s QPID 0x%x ep %p disconnecting\n",
	__func__, qhp->wq.qpid, qhp->ep);
	iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
	} else {
	PDBG("%s post REQ_ERR AE QPID 0x%x\n", __func__,
	qhp->wq.qpid);
	post_qp_event(rnicp, chp, rsp_msg,
	IB_EVENT_QP_REQ_ERR, 0);
	iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
	}
	goto done;
	}

	/* Bad incoming Read request */
	if (SQ_TYPE(rsp_msg->cqe) &&
	(CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP)) {
	post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
	goto done;
	}

	/* Bad incoming write */
	if (RQ_TYPE(rsp_msg->cqe) &&
	(CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)) {
	post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
	goto done;
	}

	switch (CQE_STATUS(rsp_msg->cqe)) {

	/* Completion Events */
	case TPT_ERR_SUCCESS:

	/*
	* Confirm the destination entry if this is a RECV completion.
	*/
	if (qhp->ep && SQ_TYPE(rsp_msg->cqe))
	dst_confirm(qhp->ep->dst);
	spin_lock_irqsave(&chp->comp_handler_lock, flag);
	(*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
	spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
	break;

	case TPT_ERR_STAG:
	case TPT_ERR_PDID:
	case TPT_ERR_QPID:
	case TPT_ERR_ACCESS:
	case TPT_ERR_WRAP:
	case TPT_ERR_BOUND:
	case TPT_ERR_INVALIDATE_SHARED_MR:
	case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
	post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_ACCESS_ERR, 1);
	break;

	/* Device Fatal Errors */
	case TPT_ERR_ECC:
	case TPT_ERR_ECC_PSTAG:
	case TPT_ERR_INTERNAL_ERR:
	post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_DEVICE_FATAL, 1);
	break;

	/* QP Fatal Errors */
	case TPT_ERR_OUT_OF_RQE:
	case TPT_ERR_PBL_ADDR_BOUND:
	case TPT_ERR_CRC:
	case TPT_ERR_MARKER:
	case TPT_ERR_PDU_LEN_ERR:
	case TPT_ERR_DDP_VERSION:
	case TPT_ERR_RDMA_VERSION:
	case TPT_ERR_OPCODE:
	case TPT_ERR_DDP_QUEUE_NUM:
	case TPT_ERR_MSN:
	case TPT_ERR_TBIT:
	case TPT_ERR_MO:
	case TPT_ERR_MSN_GAP:
	case TPT_ERR_MSN_RANGE:
	case TPT_ERR_RQE_ADDR_BOUND:
	case TPT_ERR_IRD_OVERFLOW:
	post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
	break;

	default:
	printk(KERN_ERR MOD "Unknown T3 status 0x%x QPID 0x%x\n",
	CQE_STATUS(rsp_msg->cqe), qhp->wq.qpid);
	post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
	break;
	}
	done:
	if (atomic_dec_and_test(&chp->refcnt))
	wake_up(&chp->wait);
	iwch_qp_rem_ref(&qhp->ibqp);
	out:
	dev_kfree_skb_irq(skb);
	}