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Release 4.18 drivers/infiniband/ulp/ipoib/ipoib_ib.c

Directory: drivers/infiniband/ulp/ipoib
/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2004, 2005 Voltaire, 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/delay.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>

#include <linux/ip.h>
#include <linux/tcp.h>

#include "ipoib.h"

#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA

static int data_debug_level;

module_param(data_debug_level, int, 0644);
MODULE_PARM_DESC(data_debug_level,
		 "Enable data path debug tracing if > 0");
#endif




struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
				 struct ib_pd *pd, struct rdma_ah_attr *attr)
{
	struct ipoib_ah *ah;
	struct ib_ah *vah;

	ah = kmalloc(sizeof *ah, GFP_KERNEL);
	if (!ah)
		return ERR_PTR(-ENOMEM);

	ah->dev       = dev;
	ah->last_send = 0;
	kref_init(&ah->ref);

	vah = rdma_create_ah(pd, attr);
	if (IS_ERR(vah)) {
		kfree(ah);
		ah = (struct ipoib_ah *)vah;
	} else {
		ah->ah = vah;
		ipoib_dbg(ipoib_priv(dev), "Created ah %p\n", ah->ah);
	}

	return ah;
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier10478.20%120.00%


Mike Marciniszyn2619.55%120.00%


Dasaratharaman Chandramouli21.50%240.00%


Erez Shitrit10.75%120.00%


Total133100.00%5100.00%






void ipoib_free_ah(struct kref *kref)
{
	struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
	struct ipoib_dev_priv *priv = ipoib_priv(ah->dev);

	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	list_add_tail(&ah->list, &priv->dead_ahs);
	spin_unlock_irqrestore(&priv->lock, flags);
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier7398.65%150.00%


Erez Shitrit11.35%150.00%


Total74100.00%2100.00%






static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv,
				  u64 mapping[IPOIB_UD_RX_SG])
{
	ib_dma_unmap_single(priv->ca, mapping[0],
			    IPOIB_UD_BUF_SIZE(priv->max_ib_mtu),
			    DMA_FROM_DEVICE);
}


Contributors
PersonTokensPropCommitsCommitProp
Shirley Ma38100.00%1100.00%


Total38100.00%1100.00%






static int ipoib_ib_post_receive(struct net_device *dev, int id)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	struct ib_recv_wr *bad_wr;
	int ret;

	priv->rx_wr.wr_id   = id | IPOIB_OP_RECV;
	priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0];
	priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1];


	ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr);
	if (unlikely(ret)) {
		ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
		ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping);
		dev_kfree_skb_any(priv->rx_ring[id].skb);
		priv->rx_ring[id].skb = NULL;
	}

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier12477.02%250.00%


Shirley Ma3622.36%125.00%


Erez Shitrit10.62%125.00%


Total161100.00%4100.00%






static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	struct sk_buff *skb;
	int buf_size;
	u64 *mapping;

	buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);

	skb = dev_alloc_skb(buf_size + IPOIB_HARD_LEN);
	if (unlikely(!skb))
		return NULL;

	/*
         * the IP header will be at IPOIP_HARD_LEN + IB_GRH_BYTES, that is
         * 64 bytes aligned
         */
	skb_reserve(skb, sizeof(struct ipoib_pseudo_header));

	mapping = priv->rx_ring[id].mapping;
	mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size,
				       DMA_FROM_DEVICE);
	if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0])))
		goto error;

	priv->rx_ring[id].skb = skb;
	return skb;
error:
	dev_kfree_skb_any(skb);
	return NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier8454.55%342.86%


Shirley Ma5535.71%114.29%


Ralph Campbell74.55%114.29%


Paolo Abeni74.55%114.29%


Erez Shitrit10.65%114.29%


Total154100.00%7100.00%






static int ipoib_ib_post_receives(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	int i;

	for (i = 0; i < ipoib_recvq_size; ++i) {
		if (!ipoib_alloc_rx_skb(dev, i)) {
			ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
			return -ENOMEM;
		}
		if (ipoib_ib_post_receive(dev, i)) {
			ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
			return -EIO;
		}
	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier8896.70%240.00%


Shirley Ma22.20%240.00%


Erez Shitrit11.10%120.00%


Total91100.00%5100.00%






static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
	struct sk_buff *skb;
	u64 mapping[IPOIB_UD_RX_SG];
	union ib_gid *dgid;
	union ib_gid *sgid;

	ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
		       wr_id, wc->status);

	if (unlikely(wr_id >= ipoib_recvq_size)) {
		ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
			   wr_id, ipoib_recvq_size);
		return;
	}

	skb  = priv->rx_ring[wr_id].skb;

	if (unlikely(wc->status != IB_WC_SUCCESS)) {
		if (wc->status != IB_WC_WR_FLUSH_ERR)
			ipoib_warn(priv,
				   "failed recv event (status=%d, wrid=%d vend_err %#x)\n",
				   wc->status, wr_id, wc->vendor_err);
		ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping);
		dev_kfree_skb_any(skb);
		priv->rx_ring[wr_id].skb = NULL;
		return;
	}

	memcpy(mapping, priv->rx_ring[wr_id].mapping,
	       IPOIB_UD_RX_SG * sizeof *mapping);

	/*
         * If we can't allocate a new RX buffer, dump
         * this packet and reuse the old buffer.
         */
	if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) {
		++dev->stats.rx_dropped;
		goto repost;
	}

	ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
		       wc->byte_len, wc->slid);

	ipoib_ud_dma_unmap_rx(priv, mapping);

	skb_put(skb, wc->byte_len);

	/* First byte of dgid signals multicast when 0xff */
	dgid = &((struct ib_grh *)skb->data)->dgid;

	if (!(wc->wc_flags & IB_WC_GRH) || dgid->raw[0] != 0xff)
		skb->pkt_type = PACKET_HOST;
	else if (memcmp(dgid, dev->broadcast + 4, sizeof(union ib_gid)) == 0)
		skb->pkt_type = PACKET_BROADCAST;
	else
		skb->pkt_type = PACKET_MULTICAST;

	sgid = &((struct ib_grh *)skb->data)->sgid;

	/*
         * Drop packets that this interface sent, ie multicast packets
         * that the HCA has replicated.
         */
	if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) {
		int need_repost = 1;

		if ((wc->wc_flags & IB_WC_GRH) &&
		    sgid->global.interface_id != priv->local_gid.global.interface_id)
			need_repost = 0;

		if (need_repost) {
			dev_kfree_skb_any(skb);
			goto repost;
		}
	}

	skb_pull(skb, IB_GRH_BYTES);

	skb->protocol = ((struct ipoib_header *) skb->data)->proto;
	skb_add_pseudo_hdr(skb);

	++dev->stats.rx_packets;
	dev->stats.rx_bytes += skb->len;
	if (skb->pkt_type == PACKET_MULTICAST)
		dev->stats.multicast++;

	skb->dev = dev;
	if ((dev->features & NETIF_F_RXCSUM) &&
			likely(wc->wc_flags & IB_WC_IP_CSUM_OK))
		skb->ip_summed = CHECKSUM_UNNECESSARY;

	napi_gro_receive(&priv->recv_napi, skb);

repost:
	if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
		ipoib_warn(priv, "ipoib_ib_post_receive failed "
			   "for buf %d\n", wr_id);
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier27550.83%522.73%


Eli Cohen10719.78%29.09%


Christoph Lameter8315.34%14.55%


Shirley Ma376.84%29.09%


Alex Vesker152.77%14.55%


Or Gerlitz81.48%29.09%


Michał Mirosław61.11%14.55%


Erez Shitrit30.55%313.64%


Arnaldo Carvalho de Melo20.37%14.55%


Hal Rosenstock20.37%14.55%


Paolo Abeni10.18%14.55%


Ralph Campbell10.18%14.55%


Ajaykumar Hotchandani10.18%14.55%


Total541100.00%22100.00%






int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req)
{
	struct sk_buff *skb = tx_req->skb;
	u64 *mapping = tx_req->mapping;
	int i;
	int off;

	if (skb_headlen(skb)) {
		mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb),
					       DMA_TO_DEVICE);
		if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
			return -EIO;

		off = 1;
	} else
		off = 0;

	for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
		mapping[i + off] = ib_dma_map_page(ca,
						 skb_frag_page(frag),
						 frag->page_offset, skb_frag_size(frag),
						 DMA_TO_DEVICE);
		if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
			goto partial_error;
	}
	return 0;

partial_error:
	for (; i > 0; --i) {
		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];

		ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE);
	}

	if (off)
		ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);

	return -EIO;
}


Contributors
PersonTokensPropCommitsCommitProp
Eli Cohen24995.77%250.00%


Eric Dumazet83.08%125.00%


Ian Campbell31.15%125.00%


Total260100.00%4100.00%






void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
			struct ipoib_tx_buf *tx_req)
{
	struct sk_buff *skb = tx_req->skb;
	u64 *mapping = tx_req->mapping;
	int i;
	int off;

	if (skb_headlen(skb)) {
		ib_dma_unmap_single(priv->ca, mapping[0], skb_headlen(skb),
				    DMA_TO_DEVICE);
		off = 1;
	} else
		off = 0;

	for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];

		ib_dma_unmap_page(priv->ca, mapping[i + off],
				  skb_frag_size(frag), DMA_TO_DEVICE);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Eli Cohen12292.42%250.00%


Yuval Shaia64.55%125.00%


Eric Dumazet43.03%125.00%


Total132100.00%4100.00%



/*
 * As the result of a completion error the QP Can be transferred to SQE states.
 * The function checks if the (send)QP is in SQE state and
 * moves it back to RTS state, that in order to have it functional again.
 */



static void ipoib_qp_state_validate_work(struct work_struct *work)
{
	struct ipoib_qp_state_validate *qp_work =
		container_of(work, struct ipoib_qp_state_validate, work);

	struct ipoib_dev_priv *priv = qp_work->priv;
	struct ib_qp_attr qp_attr;
	struct ib_qp_init_attr query_init_attr;
	int ret;

	ret = ib_query_qp(priv->qp, &qp_attr, IB_QP_STATE, &query_init_attr);
	if (ret) {
		ipoib_warn(priv, "%s: Failed to query QP ret: %d\n",
			   __func__, ret);
		goto free_res;
	}
	pr_info("%s: QP: 0x%x is in state: %d\n",
		__func__, priv->qp->qp_num, qp_attr.qp_state);

	/* currently support only in SQE->RTS transition*/
	if (qp_attr.qp_state == IB_QPS_SQE) {
		qp_attr.qp_state = IB_QPS_RTS;

		ret = ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE);
		if (ret) {
			pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n",
				ret, priv->qp->qp_num);
			goto free_res;
		}
		pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n",
			__func__, priv->qp->qp_num);
	} else {
		pr_warn("QP (%d) will stay in state: %d\n",
			priv->qp->qp_num, qp_attr.qp_state);
	}

free_res:
	kfree(qp_work);
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit191100.00%1100.00%


Total191100.00%1100.00%






static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	unsigned int wr_id = wc->wr_id;
	struct ipoib_tx_buf *tx_req;

	ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
		       wr_id, wc->status);

	if (unlikely(wr_id >= ipoib_sendq_size)) {
		ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
			   wr_id, ipoib_sendq_size);
		return;
	}

	tx_req = &priv->tx_ring[wr_id];

	ipoib_dma_unmap_tx(priv, tx_req);

	++dev->stats.tx_packets;
	dev->stats.tx_bytes += tx_req->skb->len;

	dev_kfree_skb_any(tx_req->skb);

	++priv->tx_tail;

	if (unlikely(netif_queue_stopped(dev) &&
		     ((priv->tx_head - priv->tx_tail) <= ipoib_sendq_size >> 1) &&
		     test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)))
		netif_wake_queue(dev);

	if (wc->status != IB_WC_SUCCESS &&
	    wc->status != IB_WC_WR_FLUSH_ERR) {
		struct ipoib_qp_state_validate *qp_work;
		ipoib_warn(priv,
			   "failed send event (status=%d, wrid=%d vend_err %#x)\n",
			   wc->status, wr_id, wc->vendor_err);
		qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC);
		if (!qp_work)
			return;

		INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work);
		qp_work->priv = priv;
		queue_work(priv->wq, &qp_work->work);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier15963.86%535.71%


Erez Shitrit7128.51%428.57%


Michael S. Tsirkin124.82%214.29%


Shirley Ma52.01%17.14%


Eli Cohen10.40%17.14%


Ajaykumar Hotchandani10.40%17.14%


Total249100.00%14100.00%






static int poll_tx(struct ipoib_dev_priv *priv)
{
	int n, i;
	struct ib_wc *wc;

	n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
	for (i = 0; i < n; ++i) {
		wc = priv->send_wc + i;
		if (wc->wr_id & IPOIB_OP_CM)
			ipoib_cm_handle_tx_wc(priv->dev, priv->send_wc + i);
		else
			ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i);
	}
	return n == MAX_SEND_CQE;
}


Contributors
PersonTokensPropCommitsCommitProp
Eli Cohen6262.63%150.00%


Erez Shitrit3737.37%150.00%


Total99100.00%2100.00%






int ipoib_rx_poll(struct napi_struct *napi, int budget)
{
	struct ipoib_dev_priv *priv =
		container_of(napi, struct ipoib_dev_priv, recv_napi);
	struct net_device *dev = priv->dev;
	int done;
	int t;
	int n, i;

	done  = 0;

poll_more:
	while (done < budget) {
		int max = (budget - done);

		t = min(IPOIB_NUM_WC, max);
		n = ib_poll_cq(priv->recv_cq, t, priv->ibwc);

		for (i = 0; i < n; i++) {
			struct ib_wc *wc = priv->ibwc + i;

			if (wc->wr_id & IPOIB_OP_RECV) {
				++done;
				if (wc->wr_id & IPOIB_OP_CM)
					ipoib_cm_handle_rx_wc(dev, wc);
				else
					ipoib_ib_handle_rx_wc(dev, wc);
			} else {
				pr_warn("%s: Got unexpected wqe id\n", __func__);
			}
		}

		if (n != t)
			break;
	}

	if (done < budget) {
		napi_complete(napi);
		if (unlikely(ib_req_notify_cq(priv->recv_cq,
					      IB_CQ_NEXT_COMP |
					      IB_CQ_REPORT_MISSED_EVENTS)) &&
		    napi_reschedule(napi))
			goto poll_more;
	}

	return done;
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier13864.49%225.00%


Stephen Hemminger3817.76%112.50%


Michael S. Tsirkin2712.62%225.00%


Erez Shitrit73.27%112.50%


Eli Cohen20.93%112.50%


Ben Hutchings20.93%112.50%


Total214100.00%8100.00%






int ipoib_tx_poll(struct napi_struct *napi, int budget)
{
	struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv,
						   send_napi);
	struct net_device *dev = priv->dev;
	int n, i;
	struct ib_wc *wc;

poll_more:
	n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);

	for (i = 0; i < n; i++) {
		wc = priv->send_wc + i;
		if (wc->wr_id & IPOIB_OP_CM)
			ipoib_cm_handle_tx_wc(dev, wc);
		else
			ipoib_ib_handle_tx_wc(dev, wc);
	}

	if (n < budget) {
		napi_complete(napi);
		if (unlikely(ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP |
					      IB_CQ_REPORT_MISSED_EVENTS)) &&
		    napi_reschedule(napi))
			goto poll_more;
	}
	return n < 0 ? 0 : n;
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit13284.62%133.33%


Stephen Hemminger159.62%133.33%


Roland Dreier95.77%133.33%


Total156100.00%3100.00%






void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr)
{
	struct ipoib_dev_priv *priv = ctx_ptr;

	napi_schedule(&priv->recv_napi);
}


Contributors
PersonTokensPropCommitsCommitProp
Eli Cohen1965.52%150.00%


Erez Shitrit1034.48%150.00%


Total29100.00%2100.00%






void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr)
{
	struct ipoib_dev_priv *priv = ctx_ptr;

	napi_schedule(&priv->send_napi);
}


Contributors
PersonTokensPropCommitsCommitProp
Eli Cohen1344.83%133.33%


Roland Dreier1137.93%133.33%


Erez Shitrit517.24%133.33%


Total29100.00%3100.00%






static inline int post_send(struct ipoib_dev_priv *priv,
			    unsigned int wr_id,
			    struct ib_ah *address, u32 dqpn,
			    struct ipoib_tx_buf *tx_req,
			    void *head, int hlen)
{
	struct ib_send_wr *bad_wr;
	struct sk_buff *skb = tx_req->skb;

	ipoib_build_sge(priv, tx_req);

	priv->tx_wr.wr.wr_id	= wr_id;
	priv->tx_wr.remote_qpn	= dqpn;
	priv->tx_wr.ah		= address;

	if (head) {
		priv->tx_wr.mss		= skb_shinfo(skb)->gso_size;
		priv->tx_wr.header	= head;
		priv->tx_wr.hlen	= hlen;
		priv->tx_wr.wr.opcode	= IB_WR_LSO;
	} else
		priv->tx_wr.wr.opcode	= IB_WR_SEND;

	return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr);
}


Contributors
PersonTokensPropCommitsCommitProp
Eli Cohen7547.77%225.00%


Roland Dreier6843.31%225.00%


Christoph Hellwig85.10%112.50%


Yuval Shaia31.91%112.50%


Erez Shitrit21.27%112.50%


Eric Dumazet10.64%112.50%


Total157100.00%8100.00%






int ipoib_send(struct net_device *dev, struct sk_buff *skb,
	       struct ib_ah *address, u32 dqpn)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	struct ipoib_tx_buf *tx_req;
	int hlen, rc;
	void *phead;
	unsigned usable_sge = priv->max_send_sge - !!skb_headlen(skb);

	if (skb_is_gso(skb)) {
		hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
		phead = skb->data;
		if (unlikely(!skb_pull(skb, hlen))) {
			ipoib_warn(priv, "linear data too small\n");
			++dev->stats.tx_dropped;
			++dev->stats.tx_errors;
			dev_kfree_skb_any(skb);
			return -1;
		}
	} else {
		if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
			ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
				   skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
			++dev->stats.tx_dropped;
			++dev->stats.tx_errors;
			ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
			return -1;
		}
		phead = NULL;
		hlen  = 0;
	}
	if (skb_shinfo(skb)->nr_frags > usable_sge) {
		if (skb_linearize(skb) < 0) {
			ipoib_warn(priv, "skb could not be linearized\n");
			++dev->stats.tx_dropped;
			++dev->stats.tx_errors;
			dev_kfree_skb_any(skb);
			return -1;
		}
		/* Does skb_linearize return ok without reducing nr_frags? */
		if (skb_shinfo(skb)->nr_frags > usable_sge) {
			ipoib_warn(priv, "too many frags after skb linearize\n");
			++dev->stats.tx_dropped;
			++dev->stats.tx_errors;
			dev_kfree_skb_any(skb);
			return -1;
		}
	}

	ipoib_dbg_data(priv,
		       "sending packet, length=%d address=%p dqpn=0x%06x\n",
		       skb->len, address, dqpn);

	/*
         * We put the skb into the tx_ring _before_ we call post_send()
         * because it's entirely possible that the completion handler will
         * run before we execute anything after the post_send().  That
         * means we have to make sure everything is properly recorded and
         * our state is consistent before we call post_send().
         */
	tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
	tx_req->skb = skb;
	if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
		++dev->stats.tx_errors;
		dev_kfree_skb_any(skb);
		return -1;
	}

	if (skb->ip_summed == CHECKSUM_PARTIAL)
		priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM;
	else
		priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
	/* increase the tx_head after send success, but use it for queue state */
	if (priv->tx_head - priv->tx_tail == ipoib_sendq_size - 1) {
		ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
		netif_stop_queue(dev);
	}

	skb_orphan(skb);
	skb_dst_drop(skb);

	if (netif_queue_stopped(dev))
		if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP |
				     IB_CQ_REPORT_MISSED_EVENTS) < 0)
			ipoib_warn(priv, "request notify on send CQ failed\n");

	rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
		       address, dqpn, tx_req, phead, hlen);
	if (unlikely(rc)) {
		ipoib_warn(priv, "post_send failed, error %d\n", rc);
		++dev->stats.tx_errors;
		ipoib_dma_unmap_tx(priv, tx_req);
		dev_kfree_skb_any(skb);
		if (netif_queue_stopped(dev))
			netif_wake_queue(dev);
		rc = 0;
	} else {
		netif_trans_update(dev);

		rc = priv->tx_head;
		++priv->tx_head;
	}
	return rc;
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier19834.32%417.39%


Eli Cohen16628.77%521.74%


Hans Westgaard Ry10418.02%14.35%


Erez Shitrit6811.79%521.74%


Michael S. Tsirkin132.25%28.70%


Or Gerlitz132.25%14.35%


Christoph Hellwig40.69%14.35%


Ralph Campbell40.69%14.35%


Florian Westphal30.52%14.35%


Alex Estrin20.35%14.35%


Shirley Ma20.35%14.35%


Total577100.00%23100.00%






static void __ipoib_reap_ah(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	struct ipoib_ah *ah, *tah;
	LIST_HEAD(remove_list);
	unsigned long flags;

	netif_tx_lock_bh(dev);
	spin_lock_irqsave(&priv->lock, flags);

	list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
		if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
			list_del(&ah->list);
			rdma_destroy_ah(ah->ah);
			kfree(ah);
		}

	spin_unlock_irqrestore(&priv->lock, flags);
	netif_tx_unlock_bh(dev);
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier11698.31%571.43%


Dasaratharaman Chandramouli10.85%114.29%


Erez Shitrit10.85%114.29%


Total118100.00%7100.00%






void ipoib_reap_ah(struct work_struct *work)
{
	struct ipoib_dev_priv *priv =
		container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
	struct net_device *dev = priv->dev;

	__ipoib_reap_ah(dev);

	if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
		queue_delayed_work(priv->wq, &priv->ah_reap_task,
				   round_jiffies_relative(HZ));
}


Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier4563.38%125.00%


David Howells2028.17%125.00%


Anton Blanchard34.23%125.00%


Doug Ledford34.23%125.00%


Total71100.00%4100.00%






static void ipoib_flush_ah(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	cancel_delayed_work(&priv->ah_reap_task);
	flush_workqueue(priv->wq);
	ipoib_reap_ah(&priv->ah_reap_task.work);
}


Contributors
PersonTokensPropCommitsCommitProp
Doug Ledford4597.83%266.67%


Erez Shitrit12.17%133.33%


Total46100.00%3100.00%






static void ipoib_stop_ah(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	set_bit(IPOIB_STOP_REAPER, &priv->flags);
	ipoib_flush_ah(dev);
}


Contributors
PersonTokensPropCommitsCommitProp
Doug Ledford3597.22%150.00%


Erez Shitrit12.78%150.00%


Total36100.00%2100.00%






static int recvs_pending(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	int pending = 0;
	int i;

	for (i = 0; i < ipoib_recvq_size; ++i)
		if (priv->rx_ring[i].skb)
			++pending;

	return pending;
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit5288.14%266.67%


Eli Cohen711.86%133.33%


Total59100.00%3100.00%






static void check_qp_movement_and_print(struct ipoib_dev_priv *priv,
					struct ib_qp *qp,
					enum ib_qp_state new_state)
{
	struct ib_qp_attr qp_attr;
	struct ib_qp_init_attr query_init_attr;
	int ret;

	ret = ib_query_qp(qp, &qp_attr, IB_QP_STATE, &query_init_attr);
	if (ret) {
		ipoib_warn(priv, "%s: Failed to query QP\n", __func__);
		return;
	}
	/* print according to the new-state and the previous state.*/
	if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET)
		ipoib_dbg(priv, "Failed modify QP, IB_QPS_RESET to IB_QPS_ERR, acceptable\n");
	else
		ipoib_warn(priv, "Failed to modify QP to state: %d from state: %d\n",
			   new_state, qp_attr.qp_state);
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit96100.00%1100.00%


Total96100.00%1100.00%






static void ipoib_napi_enable(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	napi_enable(&priv->recv_napi);
	napi_enable(&priv->send_napi);
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit37100.00%1100.00%


Total37100.00%1100.00%






static void ipoib_napi_disable(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	napi_disable(&priv->recv_napi);
	napi_disable(&priv->send_napi);
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit37100.00%1100.00%


Total37100.00%1100.00%






int ipoib_ib_dev_stop_default(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	struct ib_qp_attr qp_attr;
	unsigned long begin;
	struct ipoib_tx_buf *tx_req;
	int i;

	if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
		ipoib_napi_disable(dev);

	ipoib_cm_dev_stop(dev);

	/*
         * Move our QP to the error state and then reinitialize in
         * when all work requests have completed or have been flushed.
         */
	qp_attr.qp_state = IB_QPS_ERR;
	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
		check_qp_movement_and_print(priv, priv->qp, IB_QPS_ERR);

	/* Wait for all sends and receives to complete */
	begin = jiffies;

	while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
		if (time_after(jiffies, begin + 5 * HZ)) {
			ipoib_warn(priv,
				   "timing out; %d sends %d receives not completed\n",
				   priv->tx_head - priv->tx_tail,
				   recvs_pending(dev));

			/*
                         * assume the HW is wedged and just free up
                         * all our pending work requests.
                         */
			while ((int)priv->tx_tail - (int)priv->tx_head < 0) {
				tx_req = &priv->tx_ring[priv->tx_tail &
							(ipoib_sendq_size - 1)];
				ipoib_dma_unmap_tx(priv, tx_req);
				dev_kfree_skb_any(tx_req->skb);
				++priv->tx_tail;
			}

			for (i = 0; i < ipoib_recvq_size; ++i) {
				struct ipoib_rx_buf *rx_req;

				rx_req = &priv->rx_ring[i];
				if (!rx_req->skb)
					continue;
				ipoib_ud_dma_unmap_rx(priv,
						      priv->rx_ring[i].mapping);
				dev_kfree_skb_any(rx_req->skb);
				rx_req->skb = NULL;
			}

			goto timeout;
		}

		ipoib_drain_cq(dev);

		usleep_range(1000, 2000);
	}

	ipoib_dbg(priv, "All sends and receives done.\n");

timeout:
	qp_attr.qp_state = IB_QPS_RESET;
	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
		ipoib_warn(priv, "Failed to modify QP to RESET state\n");

	ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit22868.47%642.86%


Roland Dreier4513.51%17.14%


Leonid Arsh236.91%17.14%


Yosef Etigin154.50%214.29%


Michael S. Tsirkin123.60%17.14%


Leon Romanovsky41.20%17.14%


Alex Estrin41.20%17.14%


Anton Blanchard20.60%17.14%


Total333100.00%14100.00%






int ipoib_ib_dev_stop(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	priv->rn_ops->ndo_stop(dev);

	clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
	ipoib_flush_ah(dev);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit47100.00%2100.00%


Total47100.00%2100.00%






int ipoib_ib_dev_open_default(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	int ret;

	ret = ipoib_init_qp(dev);
	if (ret) {
		ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
		return -1;
	}

	ret = ipoib_ib_post_receives(dev);
	if (ret) {
		ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
		goto out;
	}

	ret = ipoib_cm_dev_open(dev);
	if (ret) {
		ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
		goto out;
	}

	if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
		ipoib_napi_enable(dev);

	return 0;
out:
	return -1;
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit7055.56%457.14%


Roland Dreier4132.54%114.29%


Leonid Arsh1411.11%114.29%


Zhu Yanjun10.79%114.29%


Total126100.00%7100.00%






int ipoib_ib_dev_open(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	ipoib_pkey_dev_check_presence(dev);

	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
		ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey,
			   (!(priv->pkey & 0x7fff) ? "Invalid" : "not found"));
		return -1;
	}

	clear_bit(IPOIB_STOP_REAPER, &priv->flags);
	queue_delayed_work(priv->wq, &priv->ah_reap_task,
			   round_jiffies_relative(HZ));

	if (priv->rn_ops->ndo_open(dev)) {
		pr_warn("%s: Failed to open dev\n", dev->name);
		goto dev_stop;
	}

	set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);

	return 0;

dev_stop:
	set_bit(IPOIB_STOP_REAPER, &priv->flags);
	cancel_delayed_work(&priv->ah_reap_task);
	set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
	ipoib_ib_dev_stop(dev);
	return -1;
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit11465.52%333.33%


Michael S. Tsirkin3017.24%222.22%


Roland Dreier2715.52%333.33%


Eli Cohen31.72%111.11%


Total174100.00%9100.00%






void ipoib_pkey_dev_check_presence(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	struct rdma_netdev *rn = netdev_priv(dev);

	if (!(priv->pkey & 0x7fff) ||
	    ib_find_pkey(priv->ca, priv->port, priv->pkey,
			 &priv->pkey_index)) {
		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	} else {
		if (rn->set_id)
			rn->set_id(dev, priv->pkey_index);
		set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit3735.92%225.00%


Alex Vesker3130.10%112.50%


Roland Dreier1615.53%112.50%


Yosef Etigin87.77%112.50%


Leonid Arsh76.80%112.50%


Michael S. Tsirkin32.91%112.50%


Zhu Yanjun10.97%112.50%


Total103100.00%8100.00%






void ipoib_ib_dev_up(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	ipoib_pkey_dev_check_presence(dev);

	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
		ipoib_dbg(priv, "PKEY is not assigned.\n");
		return;
	}

	set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);

	ipoib_mcast_start_thread(dev);
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit4571.43%266.67%


Roland Dreier1828.57%133.33%


Total63100.00%3100.00%






void ipoib_ib_dev_down(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	ipoib_dbg(priv, "downing ib_dev\n");

	clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
	netif_carrier_off(dev);

	ipoib_mcast_stop_thread(dev);
	ipoib_mcast_dev_flush(dev);

	ipoib_flush_paths(dev);
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit4375.44%266.67%


Roland Dreier1424.56%133.33%


Total57100.00%3100.00%






void ipoib_drain_cq(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	int i, n;

	/*
         * We call completion handling routines that expect to be
         * called from the BH-disabled NAPI poll context, so disable
         * BHs here too.
         */
	local_bh_disable();

	do {
		n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
		for (i = 0; i < n; ++i) {
			/*
                         * Convert any successful completions to flush
                         * errors to avoid passing packets up the
                         * stack after bringing the device down.
                         */
			if (priv->ibwc[i].status == IB_WC_SUCCESS)
				priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;

			if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
				if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
					ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
				else
					ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
			} else {
				pr_warn("%s: Got unexpected wqe id\n", __func__);
			}
		}
	} while (n == IPOIB_NUM_WC);

	while (poll_tx(priv))
		; /* nothing */

	local_bh_enable();
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit10764.07%330.00%


Roland Dreier4526.95%330.00%


Shirley Ma52.99%110.00%


Ralph Campbell52.99%110.00%


Michael S. Tsirkin31.80%110.00%


Eli Cohen21.20%110.00%


Total167100.00%10100.00%



/*
 * Takes whatever value which is in pkey index 0 and updates priv->pkey
 * returns 0 if the pkey value was changed.
 */



static inline int update_parent_pkey(struct ipoib_dev_priv *priv)
{
	int result;
	u16 prev_pkey;

	prev_pkey = priv->pkey;
	result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey);
	if (result) {
		ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n",
			   priv->port, result);
		return result;
	}

	priv->pkey |= 0x8000;

	if (prev_pkey != priv->pkey) {
		ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n",
			  prev_pkey, priv->pkey);
		/*
                 * Update the pkey in the broadcast address, while making sure to set
                 * the full membership bit, so that we join the right broadcast group.
                 */
		priv->dev->broadcast[8] = priv->pkey >> 8;
		priv->dev->broadcast[9] = priv->pkey & 0xff;
		return 0;
	}

	return 1;
}

Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit132100.00%1100.00%


Total132100.00%1100.00%



/*
 * returns 0 if pkey value was found in a different slot.
 */



static inline int update_child_pkey(struct ipoib_dev_priv *priv)
{
	u16 old_index = priv->pkey_index;

	priv->pkey_index = 0;
	ipoib_pkey_dev_check_presence(priv->dev);

	if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
	    (old_index == priv->pkey_index))
		return 1;
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Alex Estrin58100.00%1100.00%


Total58100.00%1100.00%



/*
 * returns true if the device address of the ipoib interface has changed and the
 * new address is a valid one (i.e in the gid table), return false otherwise.
 */



static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv)
{
	union ib_gid search_gid;
	union ib_gid gid0;
	union ib_gid *netdev_gid;
	int err;
	u16 index;
	u8 port;
	bool ret = false;

	netdev_gid = (union ib_gid *)(priv->dev->dev_addr + 4);
	if (ib_query_gid(priv->ca, priv->port, 0, &gid0, NULL))
		return false;

	netif_addr_lock_bh(priv->dev);

	/* The subnet prefix may have changed, update it now so we won't have
         * to do it later
         */
	priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix;
	netdev_gid->global.subnet_prefix = gid0.global.subnet_prefix;
	search_gid.global.subnet_prefix = gid0.global.subnet_prefix;

	search_gid.global.interface_id = priv->local_gid.global.interface_id;

	netif_addr_unlock_bh(priv->dev);

	err = ib_find_gid(priv->ca, &search_gid, &port, &index);

	netif_addr_lock_bh(priv->dev);

	if (search_gid.global.interface_id !=
	    priv->local_gid.global.interface_id)
		/* There was a change while we were looking up the gid, bail
                 * here and let the next work sort this out
                 */
		goto out;

	/* The next section of code needs some background:
         * Per IB spec the port GUID can't change if the HCA is powered on.
         * port GUID is the basis for GID at index 0 which is the basis for
         * the default device address of a ipoib interface.
         *
         * so it seems the flow should be:
         * if user_changed_dev_addr && gid in gid tbl
         *      set bit dev_addr_set
         *      return true
         * else
         *      return false
         *
         * The issue is that there are devices that don't follow the spec,
         * they change the port GUID when the HCA is powered, so in order
         * not to break userspace applications, We need to check if the
         * user wanted to control the device address and we assume that
         * if he sets the device address back to be based on GID index 0,
         * he no longer wishs to control it.
         *
         * If the user doesn't control the the device address,
         * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means
         * the port GUID has changed and GID at index 0 has changed
         * so we need to change priv->local_gid and priv->dev->dev_addr
         * to reflect the new GID.
         */
	if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
		if (!err && port == priv->port) {
			set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
			if (index == 0)
				clear_bit(IPOIB_FLAG_DEV_ADDR_CTRL,
					  &priv->flags);
			else
				set_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags);
			ret = true;
		} else {
			ret = false;
		}
	} else {
		if (!err && port == priv->port) {
			ret = true;
		} else {
			if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) {
				memcpy(&priv->local_gid, &gid0,
				       sizeof(priv->local_gid));
				memcpy(priv->dev->dev_addr + 4, &gid0,
				       sizeof(priv->local_gid));
				ret = true;
			}
		}
	}

out:
	netif_addr_unlock_bh(priv->dev);

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Mark Bloch360100.00%2100.00%


Total360100.00%2100.00%






static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
				enum ipoib_flush_level level,
				int nesting)
{
	struct ipoib_dev_priv *cpriv;
	struct net_device *dev = priv->dev;
	int result;

	down_read_nested(&priv->vlan_rwsem, nesting);

	/*
         * Flush any child interfaces too -- they might be up even if
         * the parent is down.
         */
	list_for_each_entry(cpriv, &priv->child_intfs, list)
		__ipoib_ib_dev_flush(cpriv, level, nesting + 1);

	up_read(&priv->vlan_rwsem);

	if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) &&
	    level != IPOIB_FLUSH_HEAVY) {
		/* Make sure the dev_addr is set even if not flushing */
		if (level == IPOIB_FLUSH_LIGHT)
			ipoib_dev_addr_changed_valid(priv);
		ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
		return;
	}

	if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
		/* interface is down. update pkey and leave. */
		if (level == IPOIB_FLUSH_HEAVY) {
			if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
				update_parent_pkey(priv);
			else
				update_child_pkey(priv);
		} else if (level == IPOIB_FLUSH_LIGHT)
			ipoib_dev_addr_changed_valid(priv);
		ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
		return;
	}

	if (level == IPOIB_FLUSH_HEAVY) {
		/* child devices chase their origin pkey value, while non-child
                 * (parent) devices should always takes what present in pkey index 0
                 */
		if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
			result = update_child_pkey(priv);
			if (result) {
				/* restart QP only if P_Key index is changed */
				ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
				return;
			}

		} else {
			result = update_parent_pkey(priv);
			/* restart QP only if P_Key value changed */
			if (result) {
				ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n");
				return;
			}
		}
	}

	if (level == IPOIB_FLUSH_LIGHT) {
		int oper_up;
		ipoib_mark_paths_invalid(dev);
		/* Set IPoIB operation as down to prevent races between:
                 * the flush flow which leaves MCG and on the fly joins
                 * which can happen during that time. mcast restart task
                 * should deal with join requests we missed.
                 */
		oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
		ipoib_mcast_dev_flush(dev);
		if (oper_up)
			set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
		ipoib_flush_ah(dev);
	}

	if (level >= IPOIB_FLUSH_NORMAL)
		ipoib_ib_dev_down(dev);

	if (level == IPOIB_FLUSH_HEAVY) {
		if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
			ipoib_ib_dev_stop(dev);

		if (ipoib_ib_dev_open(dev))
			return;

		if (netif_queue_stopped(dev))
			netif_start_queue(dev);
	}

	/*
         * The device could have been brought down between the start and when
         * we get here, don't bring it back up if it's not configured up
         */
	if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
		if (level >= IPOIB_FLUSH_NORMAL)
			ipoib_ib_dev_up(dev);
		if (ipoib_dev_addr_changed_valid(priv))
			ipoib_mcast_restart_task(&priv->restart_task);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Yosef Etigin8120.25%15.88%


Alex Estrin5914.75%15.88%


Roland Dreier5413.50%211.76%


Erez Shitrit4812.00%317.65%


Moni Shoua379.25%15.88%


Alex Vesker328.00%211.76%


Mark Bloch317.75%15.88%


Leonid Arsh225.50%15.88%


David Howells112.75%15.88%


Haggai Eran102.50%15.88%


Eli Cohen61.50%15.88%


Doug Ledford51.25%15.88%


Jack Morgenstein41.00%15.88%


Total400100.00%17100.00%






void ipoib_ib_dev_flush_light(struct work_struct *work)
{
	struct ipoib_dev_priv *priv =
		container_of(work, struct ipoib_dev_priv, flush_light);

	__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0);
}


Contributors
PersonTokensPropCommitsCommitProp
Yosef Etigin2779.41%125.00%


Moni Shoua38.82%125.00%


Roland Dreier25.88%125.00%


Haggai Eran25.88%125.00%


Total34100.00%4100.00%






void ipoib_ib_dev_flush_normal(struct work_struct *work)
{
	struct ipoib_dev_priv *priv =
		container_of(work, struct ipoib_dev_priv, flush_normal);

	__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0);
}


Contributors
PersonTokensPropCommitsCommitProp
Yosef Etigin2264.71%125.00%


Moni Shoua514.71%125.00%


Roland Dreier514.71%125.00%


Haggai Eran25.88%125.00%


Total34100.00%4100.00%






void ipoib_ib_dev_flush_heavy(struct work_struct *work)
{
	struct ipoib_dev_priv *priv =
		container_of(work, struct ipoib_dev_priv, flush_heavy);

	rtnl_lock();
	__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0);
	rtnl_unlock();
}


Contributors
PersonTokensPropCommitsCommitProp
Moni Shoua2562.50%116.67%


Alex Vesker615.00%116.67%


Michael S. Tsirkin410.00%116.67%


Yosef Etigin25.00%116.67%


Haggai Eran25.00%116.67%


Roland Dreier12.50%116.67%


Total40100.00%6100.00%






void ipoib_ib_dev_cleanup(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	ipoib_dbg(priv, "cleaning up ib_dev\n");
	/*
         * We must make sure there are no more (path) completions
         * that may wish to touch priv fields that are no longer valid
         */
	ipoib_flush_paths(dev);

	ipoib_mcast_stop_thread(dev);
	ipoib_mcast_dev_flush(dev);

	/*
         * All of our ah references aren't free until after
         * ipoib_mcast_dev_flush(), ipoib_flush_paths, and
         * the neighbor garbage collection is stopped and reaped.
         * That should all be done now, so make a final ah flush.
         */
	ipoib_stop_ah(dev);

	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);

	priv->rn_ops->ndo_uninit(dev);

	if (priv->pd) {
		ib_dealloc_pd(priv->pd);
		priv->pd = NULL;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Erez Shitrit4348.31%457.14%


Roland Dreier3943.82%114.29%


Doug Ledford66.74%114.29%


Eli Cohen11.12%114.29%


Total89100.00%7100.00%




Overall Contributors
PersonTokensPropCommitsCommitProp
Roland Dreier183430.30%1819.15%


Erez Shitrit167227.62%1515.96%


Eli Cohen84113.89%99.57%


Mark Bloch3926.48%22.13%


Shirley Ma1802.97%22.13%


Yosef Etigin1552.56%22.13%


Alex Estrin1242.05%22.13%


Michael S. Tsirkin1041.72%55.32%


Hans Westgaard Ry1041.72%11.06%


Doug Ledford941.55%22.13%


Alex Vesker841.39%44.26%


Christoph Lameter831.37%11.06%


Moni Shoua701.16%11.06%


Leonid Arsh661.09%11.06%


Stephen Hemminger530.88%11.06%


David Howells310.51%11.06%


Mike Marciniszyn260.43%11.06%


Or Gerlitz210.35%33.19%


Ralph Campbell170.28%11.06%


Haggai Eran160.26%11.06%


Eric Dumazet130.21%11.06%


Christoph Hellwig120.20%11.06%


Yuval Shaia90.15%11.06%


Paolo Abeni80.13%11.06%


Michał Mirosław60.10%11.06%


Anton Blanchard50.08%11.06%


Jack Morgenstein40.07%11.06%


Leon Romanovsky40.07%11.06%


Paul Gortmaker30.05%11.06%


Dasaratharaman Chandramouli30.05%33.19%


Ian Campbell30.05%11.06%


Florian Westphal30.05%11.06%


Tejun Heo30.05%11.06%


Ben Hutchings20.03%11.06%


Ajaykumar Hotchandani20.03%11.06%


Arnaldo Carvalho de Melo20.03%11.06%


Zhu Yanjun20.03%22.13%


Hal Rosenstock20.03%11.06%


Total6053100.00%94100.00%


Directory: drivers/infiniband/ulp/ipoib



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