drivers/infiniband/hw/cxgb4/ev.c - kernel/bruno - Git at Google

 /*
  * Copyright (c) 2009-2010 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/slab.h>
 #include <linux/mman.h>
 #include <net/sock.h>

 #include "iw_cxgb4.h"

 static void print_tpte(struct c4iw_dev *dev, u32 stag)
 {
 	int ret;
 	struct fw_ri_tpte tpte;

 	ret = cxgb4_read_tpte(dev->rdev.lldi.ports[0], stag,
 			      (__be32 *)&tpte);
 	if (ret) {
 		dev_err(&dev->rdev.lldi.pdev->dev,
 			"%s cxgb4_read_tpte err %d\n", __func__, ret);
 		return;
 	}
 	PDBG("stag idx 0x%x valid %d key 0x%x state %d pdid %d "
 	       "perm 0x%x ps %d len 0x%llx va 0x%llx\n",
 	       stag & 0xffffff00,
 	       FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid)),
 	       FW_RI_TPTE_STAGKEY_G(ntohl(tpte.valid_to_pdid)),
 	       FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid)),
 	       FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid)),
 	       FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid)),
 	       FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid)),
 	       ((u64)ntohl(tpte.len_hi) << 32) | ntohl(tpte.len_lo),
 	       ((u64)ntohl(tpte.va_hi) << 32) | ntohl(tpte.va_lo_fbo));
 }

 static void dump_err_cqe(struct c4iw_dev *dev, struct t4_cqe *err_cqe)
 {
 	__be64 *p = (void *)err_cqe;

 	dev_err(&dev->rdev.lldi.pdev->dev,
 		"AE qpid %d opcode %d status 0x%x "
 		"type %d len 0x%x wrid.hi 0x%x wrid.lo 0x%x\n",
 		CQE_QPID(err_cqe), CQE_OPCODE(err_cqe),
 		CQE_STATUS(err_cqe), CQE_TYPE(err_cqe), ntohl(err_cqe->len),
 		CQE_WRID_HI(err_cqe), CQE_WRID_LOW(err_cqe));

 	PDBG("%016llx %016llx %016llx %016llx\n",
 	     be64_to_cpu(p[0]), be64_to_cpu(p[1]), be64_to_cpu(p[2]),
 	     be64_to_cpu(p[3]));

 	/*
 	 * Ingress WRITE and READ_RESP errors provide
 	 * the offending stag, so parse and log it.
 	 */
 	if (RQ_TYPE(err_cqe) && (CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE ||
 				 CQE_OPCODE(err_cqe) == FW_RI_READ_RESP))
 		print_tpte(dev, CQE_WRID_STAG(err_cqe));
 }

 static void post_qp_event(struct c4iw_dev *dev, struct c4iw_cq *chp,
 			  struct c4iw_qp *qhp,
 			  struct t4_cqe *err_cqe,
 			  enum ib_event_type ib_event)
 {
 	struct ib_event event;
 	struct c4iw_qp_attributes attrs;
 	unsigned long flag;

 	dump_err_cqe(dev, err_cqe);

 	if (qhp->attr.state == C4IW_QP_STATE_RTS) {
 		attrs.next_state = C4IW_QP_STATE_TERMINATE;
 		c4iw_modify_qp(qhp->rhp, qhp, C4IW_QP_ATTR_NEXT_STATE,
 			       &attrs, 0);
 	}

 	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);
 }

 void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe)
 {
 	struct c4iw_cq *chp;
 	struct c4iw_qp *qhp;
 	u32 cqid;

 	spin_lock_irq(&dev->lock);
 	qhp = get_qhp(dev, CQE_QPID(err_cqe));
 	if (!qhp) {
 		printk(KERN_ERR MOD "BAD AE qpid 0x%x opcode %d "
 		       "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
 		       CQE_QPID(err_cqe),
 		       CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
 		       CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
 		       CQE_WRID_LOW(err_cqe));
 		spin_unlock_irq(&dev->lock);
 		goto out;
 	}

 	if (SQ_TYPE(err_cqe))
 		cqid = qhp->attr.scq;
 	else
 		cqid = qhp->attr.rcq;
 	chp = get_chp(dev, cqid);
 	if (!chp) {
 		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(err_cqe),
 		       CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
 		       CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
 		       CQE_WRID_LOW(err_cqe));
 		spin_unlock_irq(&dev->lock);
 		goto out;
 	}

 	c4iw_qp_add_ref(&qhp->ibqp);
 	atomic_inc(&chp->refcnt);
 	spin_unlock_irq(&dev->lock);

 	/* Bad incoming write */
 	if (RQ_TYPE(err_cqe) &&
 	    (CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE)) {
 		post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_REQ_ERR);
 		goto done;
 	}

 	switch (CQE_STATUS(err_cqe)) {

 	/* Completion Events */
 	case T4_ERR_SUCCESS:
 		printk(KERN_ERR MOD "AE with status 0!\n");
 		break;

 	case T4_ERR_STAG:
 	case T4_ERR_PDID:
 	case T4_ERR_QPID:
 	case T4_ERR_ACCESS:
 	case T4_ERR_WRAP:
 	case T4_ERR_BOUND:
 	case T4_ERR_INVALIDATE_SHARED_MR:
 	case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 		post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_ACCESS_ERR);
 		break;

 	/* Device Fatal Errors */
 	case T4_ERR_ECC:
 	case T4_ERR_ECC_PSTAG:
 	case T4_ERR_INTERNAL_ERR:
 		post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_DEVICE_FATAL);
 		break;

 	/* QP Fatal Errors */
 	case T4_ERR_OUT_OF_RQE:
 	case T4_ERR_PBL_ADDR_BOUND:
 	case T4_ERR_CRC:
 	case T4_ERR_MARKER:
 	case T4_ERR_PDU_LEN_ERR:
 	case T4_ERR_DDP_VERSION:
 	case T4_ERR_RDMA_VERSION:
 	case T4_ERR_OPCODE:
 	case T4_ERR_DDP_QUEUE_NUM:
 	case T4_ERR_MSN:
 	case T4_ERR_TBIT:
 	case T4_ERR_MO:
 	case T4_ERR_MSN_GAP:
 	case T4_ERR_MSN_RANGE:
 	case T4_ERR_RQE_ADDR_BOUND:
 	case T4_ERR_IRD_OVERFLOW:
 		post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
 		break;

 	default:
 		printk(KERN_ERR MOD "Unknown T4 status 0x%x QPID 0x%x\n",
 		       CQE_STATUS(err_cqe), qhp->wq.sq.qid);
 		post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
 		break;
 	}
 done:
 	if (atomic_dec_and_test(&chp->refcnt))
 		wake_up(&chp->wait);
 	c4iw_qp_rem_ref(&qhp->ibqp);
 out:
 	return;
 }

 int c4iw_ev_handler(struct c4iw_dev *dev, u32 qid)
 {
 	struct c4iw_cq *chp;
 	unsigned long flag;

 	spin_lock_irqsave(&dev->lock, flag);
 	chp = get_chp(dev, qid);
 	if (chp) {
 		atomic_inc(&chp->refcnt);
 		spin_unlock_irqrestore(&dev->lock, flag);
 		t4_clear_cq_armed(&chp->cq);
 		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(&chp->refcnt))
 			wake_up(&chp->wait);
 	} else {
 		PDBG("%s unknown cqid 0x%x\n", __func__, qid);
 		spin_unlock_irqrestore(&dev->lock, flag);
 	}
 	return 0;
 }
	/*
	* Copyright (c) 2009-2010 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/slab.h>
	#include <linux/mman.h>
	#include <net/sock.h>

	#include "iw_cxgb4.h"

	static void print_tpte(struct c4iw_dev *dev, u32 stag)
	{
	int ret;
	struct fw_ri_tpte tpte;

	ret = cxgb4_read_tpte(dev->rdev.lldi.ports[0], stag,
	(__be32 *)&tpte);
	if (ret) {
	dev_err(&dev->rdev.lldi.pdev->dev,
	"%s cxgb4_read_tpte err %d\n", __func__, ret);
	return;
	}
	PDBG("stag idx 0x%x valid %d key 0x%x state %d pdid %d "
	"perm 0x%x ps %d len 0x%llx va 0x%llx\n",
	stag & 0xffffff00,
	FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid)),
	FW_RI_TPTE_STAGKEY_G(ntohl(tpte.valid_to_pdid)),
	FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid)),
	FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid)),
	FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid)),
	FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid)),
	((u64)ntohl(tpte.len_hi) << 32) \| ntohl(tpte.len_lo),
	((u64)ntohl(tpte.va_hi) << 32) \| ntohl(tpte.va_lo_fbo));
	}

	static void dump_err_cqe(struct c4iw_dev dev, struct t4_cqe err_cqe)
	{
	__be64 p = (void )err_cqe;

	dev_err(&dev->rdev.lldi.pdev->dev,
	"AE qpid %d opcode %d status 0x%x "
	"type %d len 0x%x wrid.hi 0x%x wrid.lo 0x%x\n",
	CQE_QPID(err_cqe), CQE_OPCODE(err_cqe),
	CQE_STATUS(err_cqe), CQE_TYPE(err_cqe), ntohl(err_cqe->len),
	CQE_WRID_HI(err_cqe), CQE_WRID_LOW(err_cqe));

	PDBG("%016llx %016llx %016llx %016llx\n",
	be64_to_cpu(p[0]), be64_to_cpu(p[1]), be64_to_cpu(p[2]),
	be64_to_cpu(p[3]));

	/*
	* Ingress WRITE and READ_RESP errors provide
	* the offending stag, so parse and log it.
	*/
	if (RQ_TYPE(err_cqe) && (CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE \|\|
	CQE_OPCODE(err_cqe) == FW_RI_READ_RESP))
	print_tpte(dev, CQE_WRID_STAG(err_cqe));
	}

	static void post_qp_event(struct c4iw_dev dev, struct c4iw_cq chp,
	struct c4iw_qp *qhp,
	struct t4_cqe *err_cqe,
	enum ib_event_type ib_event)
	{
	struct ib_event event;
	struct c4iw_qp_attributes attrs;
	unsigned long flag;

	dump_err_cqe(dev, err_cqe);

	if (qhp->attr.state == C4IW_QP_STATE_RTS) {
	attrs.next_state = C4IW_QP_STATE_TERMINATE;
	c4iw_modify_qp(qhp->rhp, qhp, C4IW_QP_ATTR_NEXT_STATE,
	&attrs, 0);
	}

	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);
	}

	void c4iw_ev_dispatch(struct c4iw_dev dev, struct t4_cqe err_cqe)
	{
	struct c4iw_cq *chp;
	struct c4iw_qp *qhp;
	u32 cqid;

	spin_lock_irq(&dev->lock);
	qhp = get_qhp(dev, CQE_QPID(err_cqe));
	if (!qhp) {
	printk(KERN_ERR MOD "BAD AE qpid 0x%x opcode %d "
	"status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
	CQE_QPID(err_cqe),
	CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
	CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
	CQE_WRID_LOW(err_cqe));
	spin_unlock_irq(&dev->lock);
	goto out;
	}

	if (SQ_TYPE(err_cqe))
	cqid = qhp->attr.scq;
	else
	cqid = qhp->attr.rcq;
	chp = get_chp(dev, cqid);
	if (!chp) {
	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(err_cqe),
	CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
	CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
	CQE_WRID_LOW(err_cqe));
	spin_unlock_irq(&dev->lock);
	goto out;
	}

	c4iw_qp_add_ref(&qhp->ibqp);
	atomic_inc(&chp->refcnt);
	spin_unlock_irq(&dev->lock);

	/* Bad incoming write */
	if (RQ_TYPE(err_cqe) &&
	(CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE)) {
	post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_REQ_ERR);
	goto done;
	}

	switch (CQE_STATUS(err_cqe)) {

	/* Completion Events */
	case T4_ERR_SUCCESS:
	printk(KERN_ERR MOD "AE with status 0!\n");
	break;

	case T4_ERR_STAG:
	case T4_ERR_PDID:
	case T4_ERR_QPID:
	case T4_ERR_ACCESS:
	case T4_ERR_WRAP:
	case T4_ERR_BOUND:
	case T4_ERR_INVALIDATE_SHARED_MR:
	case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
	post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_ACCESS_ERR);
	break;

	/* Device Fatal Errors */
	case T4_ERR_ECC:
	case T4_ERR_ECC_PSTAG:
	case T4_ERR_INTERNAL_ERR:
	post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_DEVICE_FATAL);
	break;

	/* QP Fatal Errors */
	case T4_ERR_OUT_OF_RQE:
	case T4_ERR_PBL_ADDR_BOUND:
	case T4_ERR_CRC:
	case T4_ERR_MARKER:
	case T4_ERR_PDU_LEN_ERR:
	case T4_ERR_DDP_VERSION:
	case T4_ERR_RDMA_VERSION:
	case T4_ERR_OPCODE:
	case T4_ERR_DDP_QUEUE_NUM:
	case T4_ERR_MSN:
	case T4_ERR_TBIT:
	case T4_ERR_MO:
	case T4_ERR_MSN_GAP:
	case T4_ERR_MSN_RANGE:
	case T4_ERR_RQE_ADDR_BOUND:
	case T4_ERR_IRD_OVERFLOW:
	post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
	break;

	default:
	printk(KERN_ERR MOD "Unknown T4 status 0x%x QPID 0x%x\n",
	CQE_STATUS(err_cqe), qhp->wq.sq.qid);
	post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
	break;
	}
	done:
	if (atomic_dec_and_test(&chp->refcnt))
	wake_up(&chp->wait);
	c4iw_qp_rem_ref(&qhp->ibqp);
	out:
	return;
	}

	int c4iw_ev_handler(struct c4iw_dev *dev, u32 qid)
	{
	struct c4iw_cq *chp;
	unsigned long flag;

	spin_lock_irqsave(&dev->lock, flag);
	chp = get_chp(dev, qid);
	if (chp) {
	atomic_inc(&chp->refcnt);
	spin_unlock_irqrestore(&dev->lock, flag);
	t4_clear_cq_armed(&chp->cq);
	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(&chp->refcnt))
	wake_up(&chp->wait);
	} else {
	PDBG("%s unknown cqid 0x%x\n", __func__, qid);
	spin_unlock_irqrestore(&dev->lock, flag);
	}
	return 0;
	}