Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. |
Roland Dreier | 2a1d9b7 | 2005-08-10 23:03:10 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
| 4 | * Copyright (c) 2005 Mellanox Technologies. All rights reserved. |
| 5 | * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * This software is available to you under a choice of one of two |
| 8 | * licenses. You may choose to be licensed under the terms of the GNU |
| 9 | * General Public License (GPL) Version 2, available from the file |
| 10 | * COPYING in the main directory of this source tree, or the |
| 11 | * OpenIB.org BSD license below: |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or |
| 14 | * without modification, are permitted provided that the following |
| 15 | * conditions are met: |
| 16 | * |
| 17 | * - Redistributions of source code must retain the above |
| 18 | * copyright notice, this list of conditions and the following |
| 19 | * disclaimer. |
| 20 | * |
| 21 | * - Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials |
| 24 | * provided with the distribution. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 33 | * SOFTWARE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
| 36 | #include <linux/delay.h> |
Paul Gortmaker | fec14d2 | 2011-08-30 12:32:52 -0400 | [diff] [blame] | 37 | #include <linux/moduleparam.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/dma-mapping.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 39 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 41 | #include <linux/ip.h> |
| 42 | #include <linux/tcp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | #include "ipoib.h" |
| 45 | |
| 46 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA |
| 47 | static int data_debug_level; |
| 48 | |
| 49 | module_param(data_debug_level, int, 0644); |
| 50 | MODULE_PARM_DESC(data_debug_level, |
| 51 | "Enable data path debug tracing if > 0"); |
| 52 | #endif |
| 53 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 54 | static DEFINE_MUTEX(pkey_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | struct ipoib_ah *ipoib_create_ah(struct net_device *dev, |
| 57 | struct ib_pd *pd, struct ib_ah_attr *attr) |
| 58 | { |
| 59 | struct ipoib_ah *ah; |
Mike Marciniszyn | 3874397 | 2011-11-21 08:43:54 -0500 | [diff] [blame] | 60 | struct ib_ah *vah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | ah = kmalloc(sizeof *ah, GFP_KERNEL); |
| 63 | if (!ah) |
Mike Marciniszyn | 3874397 | 2011-11-21 08:43:54 -0500 | [diff] [blame] | 64 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | ah->dev = dev; |
| 67 | ah->last_send = 0; |
| 68 | kref_init(&ah->ref); |
| 69 | |
Mike Marciniszyn | 3874397 | 2011-11-21 08:43:54 -0500 | [diff] [blame] | 70 | vah = ib_create_ah(pd, attr); |
| 71 | if (IS_ERR(vah)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | kfree(ah); |
Mike Marciniszyn | 3874397 | 2011-11-21 08:43:54 -0500 | [diff] [blame] | 73 | ah = (struct ipoib_ah *)vah; |
| 74 | } else { |
| 75 | ah->ah = vah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah); |
Mike Marciniszyn | 3874397 | 2011-11-21 08:43:54 -0500 | [diff] [blame] | 77 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | return ah; |
| 80 | } |
| 81 | |
| 82 | void ipoib_free_ah(struct kref *kref) |
| 83 | { |
| 84 | struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); |
| 85 | struct ipoib_dev_priv *priv = netdev_priv(ah->dev); |
| 86 | |
| 87 | unsigned long flags; |
| 88 | |
Roland Dreier | 31c02e2 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 89 | spin_lock_irqsave(&priv->lock, flags); |
| 90 | list_add_tail(&ah->list, &priv->dead_ahs); |
| 91 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
| 93 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 94 | static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv, |
| 95 | u64 mapping[IPOIB_UD_RX_SG]) |
| 96 | { |
| 97 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) { |
| 98 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_UD_HEAD_SIZE, |
| 99 | DMA_FROM_DEVICE); |
| 100 | ib_dma_unmap_page(priv->ca, mapping[1], PAGE_SIZE, |
| 101 | DMA_FROM_DEVICE); |
| 102 | } else |
| 103 | ib_dma_unmap_single(priv->ca, mapping[0], |
| 104 | IPOIB_UD_BUF_SIZE(priv->max_ib_mtu), |
| 105 | DMA_FROM_DEVICE); |
| 106 | } |
| 107 | |
| 108 | static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv *priv, |
| 109 | struct sk_buff *skb, |
| 110 | unsigned int length) |
| 111 | { |
| 112 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) { |
| 113 | skb_frag_t *frag = &skb_shinfo(skb)->frags[0]; |
| 114 | unsigned int size; |
| 115 | /* |
| 116 | * There is only two buffers needed for max_payload = 4K, |
| 117 | * first buf size is IPOIB_UD_HEAD_SIZE |
| 118 | */ |
| 119 | skb->tail += IPOIB_UD_HEAD_SIZE; |
| 120 | skb->len += length; |
| 121 | |
| 122 | size = length - IPOIB_UD_HEAD_SIZE; |
| 123 | |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 124 | skb_frag_size_set(frag, size); |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 125 | skb->data_len += size; |
Eric Dumazet | b28ba72 | 2012-07-10 10:03:41 +0000 | [diff] [blame] | 126 | skb->truesize += PAGE_SIZE; |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 127 | } else |
| 128 | skb_put(skb, length); |
| 129 | |
| 130 | } |
| 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | static int ipoib_ib_post_receive(struct net_device *dev, int id) |
| 133 | { |
| 134 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 135 | struct ib_recv_wr *bad_wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | int ret; |
| 137 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 138 | priv->rx_wr.wr_id = id | IPOIB_OP_RECV; |
| 139 | priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0]; |
| 140 | priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 143 | ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 144 | if (unlikely(ret)) { |
| 145 | ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 146 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping); |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 147 | dev_kfree_skb_any(priv->rx_ring[id].skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | priv->rx_ring[id].skb = NULL; |
| 149 | } |
| 150 | |
| 151 | return ret; |
| 152 | } |
| 153 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 154 | static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id) |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 155 | { |
| 156 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 157 | struct sk_buff *skb; |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 158 | int buf_size; |
Eric Dumazet | b28ba72 | 2012-07-10 10:03:41 +0000 | [diff] [blame] | 159 | int tailroom; |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 160 | u64 *mapping; |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 161 | |
Eric Dumazet | b28ba72 | 2012-07-10 10:03:41 +0000 | [diff] [blame] | 162 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) { |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 163 | buf_size = IPOIB_UD_HEAD_SIZE; |
Eric Dumazet | b28ba72 | 2012-07-10 10:03:41 +0000 | [diff] [blame] | 164 | tailroom = 128; /* reserve some tailroom for IP/TCP headers */ |
| 165 | } else { |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 166 | buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu); |
Eric Dumazet | b28ba72 | 2012-07-10 10:03:41 +0000 | [diff] [blame] | 167 | tailroom = 0; |
| 168 | } |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 169 | |
Eric Dumazet | b28ba72 | 2012-07-10 10:03:41 +0000 | [diff] [blame] | 170 | skb = dev_alloc_skb(buf_size + tailroom + 4); |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 171 | if (unlikely(!skb)) |
| 172 | return NULL; |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 173 | |
| 174 | /* |
| 175 | * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte |
| 176 | * header. So we need 4 more bytes to get to 48 and align the |
| 177 | * IP header to a multiple of 16. |
| 178 | */ |
| 179 | skb_reserve(skb, 4); |
| 180 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 181 | mapping = priv->rx_ring[id].mapping; |
| 182 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size, |
| 183 | DMA_FROM_DEVICE); |
| 184 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) |
| 185 | goto error; |
| 186 | |
| 187 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) { |
| 188 | struct page *page = alloc_page(GFP_ATOMIC); |
| 189 | if (!page) |
| 190 | goto partial_error; |
| 191 | skb_fill_page_desc(skb, 0, page, 0, PAGE_SIZE); |
| 192 | mapping[1] = |
Ian Campbell | 5581be3 | 2011-08-24 22:28:10 +0000 | [diff] [blame] | 193 | ib_dma_map_page(priv->ca, page, |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 194 | 0, PAGE_SIZE, DMA_FROM_DEVICE); |
| 195 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[1]))) |
| 196 | goto partial_error; |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 197 | } |
| 198 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 199 | priv->rx_ring[id].skb = skb; |
| 200 | return skb; |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 201 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 202 | partial_error: |
| 203 | ib_dma_unmap_single(priv->ca, mapping[0], buf_size, DMA_FROM_DEVICE); |
| 204 | error: |
| 205 | dev_kfree_skb_any(skb); |
| 206 | return NULL; |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 207 | } |
| 208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | static int ipoib_ib_post_receives(struct net_device *dev) |
| 210 | { |
| 211 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 212 | int i; |
| 213 | |
Shirley Ma | 0f48525 | 2006-04-10 09:43:58 -0700 | [diff] [blame] | 214 | for (i = 0; i < ipoib_recvq_size; ++i) { |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 215 | if (!ipoib_alloc_rx_skb(dev, i)) { |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 216 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
| 217 | return -ENOMEM; |
| 218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | if (ipoib_ib_post_receive(dev, i)) { |
| 220 | ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); |
| 221 | return -EIO; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 228 | static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
| 229 | { |
| 230 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 231 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; |
| 232 | struct sk_buff *skb; |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 233 | u64 mapping[IPOIB_UD_RX_SG]; |
Christoph Lameter | fed1db3 | 2010-08-27 08:29:38 -0500 | [diff] [blame] | 234 | union ib_gid *dgid; |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 235 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 236 | ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", |
| 237 | wr_id, wc->status); |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 238 | |
| 239 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
| 240 | ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", |
| 241 | wr_id, ipoib_recvq_size); |
| 242 | return; |
| 243 | } |
| 244 | |
| 245 | skb = priv->rx_ring[wr_id].skb; |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 246 | |
| 247 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
| 248 | if (wc->status != IB_WC_WR_FLUSH_ERR) |
| 249 | ipoib_warn(priv, "failed recv event " |
| 250 | "(status=%d, wrid=%d vend_err %x)\n", |
| 251 | wc->status, wr_id, wc->vendor_err); |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 252 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping); |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 253 | dev_kfree_skb_any(skb); |
| 254 | priv->rx_ring[wr_id].skb = NULL; |
| 255 | return; |
| 256 | } |
| 257 | |
| 258 | /* |
Roland Dreier | 1b844af | 2007-07-10 13:43:53 -0700 | [diff] [blame] | 259 | * Drop packets that this interface sent, ie multicast packets |
| 260 | * that the HCA has replicated. |
| 261 | */ |
| 262 | if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) |
| 263 | goto repost; |
| 264 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 265 | memcpy(mapping, priv->rx_ring[wr_id].mapping, |
| 266 | IPOIB_UD_RX_SG * sizeof *mapping); |
| 267 | |
Roland Dreier | 1b844af | 2007-07-10 13:43:53 -0700 | [diff] [blame] | 268 | /* |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 269 | * If we can't allocate a new RX buffer, dump |
| 270 | * this packet and reuse the old buffer. |
| 271 | */ |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 272 | if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) { |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 273 | ++dev->stats.rx_dropped; |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 274 | goto repost; |
| 275 | } |
| 276 | |
| 277 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", |
| 278 | wc->byte_len, wc->slid); |
| 279 | |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 280 | ipoib_ud_dma_unmap_rx(priv, mapping); |
| 281 | ipoib_ud_skb_put_frags(priv, skb, wc->byte_len); |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 282 | |
Christoph Lameter | fed1db3 | 2010-08-27 08:29:38 -0500 | [diff] [blame] | 283 | /* First byte of dgid signals multicast when 0xff */ |
| 284 | dgid = &((struct ib_grh *)skb->data)->dgid; |
| 285 | |
| 286 | if (!(wc->wc_flags & IB_WC_GRH) || dgid->raw[0] != 0xff) |
| 287 | skb->pkt_type = PACKET_HOST; |
| 288 | else if (memcmp(dgid, dev->broadcast + 4, sizeof(union ib_gid)) == 0) |
| 289 | skb->pkt_type = PACKET_BROADCAST; |
| 290 | else |
| 291 | skb->pkt_type = PACKET_MULTICAST; |
| 292 | |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 293 | skb_pull(skb, IB_GRH_BYTES); |
| 294 | |
Roland Dreier | 1b844af | 2007-07-10 13:43:53 -0700 | [diff] [blame] | 295 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
| 296 | skb_reset_mac_header(skb); |
| 297 | skb_pull(skb, IPOIB_ENCAP_LEN); |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 298 | |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 299 | ++dev->stats.rx_packets; |
| 300 | dev->stats.rx_bytes += skb->len; |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 301 | |
Roland Dreier | 1b844af | 2007-07-10 13:43:53 -0700 | [diff] [blame] | 302 | skb->dev = dev; |
Or Gerlitz | d927d50 | 2012-01-11 19:03:51 +0200 | [diff] [blame] | 303 | if ((dev->features & NETIF_F_RXCSUM) && |
| 304 | likely(wc->wc_flags & IB_WC_IP_CSUM_OK)) |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 305 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 306 | |
Or Gerlitz | 8ae31e5 | 2011-01-10 17:41:55 -0800 | [diff] [blame] | 307 | napi_gro_receive(&priv->napi, skb); |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 308 | |
| 309 | repost: |
| 310 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) |
| 311 | ipoib_warn(priv, "ipoib_ib_post_receive failed " |
| 312 | "for buf %d\n", wr_id); |
| 313 | } |
| 314 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 315 | static int ipoib_dma_map_tx(struct ib_device *ca, |
| 316 | struct ipoib_tx_buf *tx_req) |
| 317 | { |
| 318 | struct sk_buff *skb = tx_req->skb; |
| 319 | u64 *mapping = tx_req->mapping; |
| 320 | int i; |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 321 | int off; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 322 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 323 | if (skb_headlen(skb)) { |
| 324 | mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb), |
| 325 | DMA_TO_DEVICE); |
| 326 | if (unlikely(ib_dma_mapping_error(ca, mapping[0]))) |
| 327 | return -EIO; |
| 328 | |
| 329 | off = 1; |
| 330 | } else |
| 331 | off = 0; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 332 | |
| 333 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 334 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
Ian Campbell | 5581be3 | 2011-08-24 22:28:10 +0000 | [diff] [blame] | 335 | mapping[i + off] = ib_dma_map_page(ca, |
| 336 | skb_frag_page(frag), |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 337 | frag->page_offset, skb_frag_size(frag), |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 338 | DMA_TO_DEVICE); |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 339 | if (unlikely(ib_dma_mapping_error(ca, mapping[i + off]))) |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 340 | goto partial_error; |
| 341 | } |
| 342 | return 0; |
| 343 | |
| 344 | partial_error: |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 345 | for (; i > 0; --i) { |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 346 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1]; |
| 347 | |
| 348 | ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE); |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 349 | } |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 350 | |
| 351 | if (off) |
| 352 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); |
| 353 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 354 | return -EIO; |
| 355 | } |
| 356 | |
| 357 | static void ipoib_dma_unmap_tx(struct ib_device *ca, |
| 358 | struct ipoib_tx_buf *tx_req) |
| 359 | { |
| 360 | struct sk_buff *skb = tx_req->skb; |
| 361 | u64 *mapping = tx_req->mapping; |
| 362 | int i; |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 363 | int off; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 364 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 365 | if (skb_headlen(skb)) { |
| 366 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); |
| 367 | off = 1; |
| 368 | } else |
| 369 | off = 0; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 370 | |
| 371 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 372 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 373 | |
| 374 | ib_dma_unmap_page(ca, mapping[i + off], skb_frag_size(frag), |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 375 | DMA_TO_DEVICE); |
| 376 | } |
| 377 | } |
| 378 | |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 379 | static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | { |
| 381 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 382 | unsigned int wr_id = wc->wr_id; |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 383 | struct ipoib_tx_buf *tx_req; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 385 | ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", |
| 386 | wr_id, wc->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 388 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
| 389 | ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", |
| 390 | wr_id, ipoib_sendq_size); |
| 391 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | } |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 393 | |
| 394 | tx_req = &priv->tx_ring[wr_id]; |
| 395 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 396 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 397 | |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 398 | ++dev->stats.tx_packets; |
| 399 | dev->stats.tx_bytes += tx_req->skb->len; |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 400 | |
| 401 | dev_kfree_skb_any(tx_req->skb); |
| 402 | |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 403 | ++priv->tx_tail; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 404 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
| 405 | netif_queue_stopped(dev) && |
| 406 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 407 | netif_wake_queue(dev); |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 408 | |
| 409 | if (wc->status != IB_WC_SUCCESS && |
| 410 | wc->status != IB_WC_WR_FLUSH_ERR) |
| 411 | ipoib_warn(priv, "failed send event " |
| 412 | "(status=%d, wrid=%d vend_err %x)\n", |
| 413 | wc->status, wr_id, wc->vendor_err); |
| 414 | } |
| 415 | |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 416 | static int poll_tx(struct ipoib_dev_priv *priv) |
| 417 | { |
| 418 | int n, i; |
| 419 | |
| 420 | n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); |
| 421 | for (i = 0; i < n; ++i) |
| 422 | ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i); |
| 423 | |
| 424 | return n == MAX_SEND_CQE; |
| 425 | } |
| 426 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 427 | int ipoib_poll(struct napi_struct *napi, int budget) |
Roland Dreier | 2439a6e | 2006-09-22 15:22:52 -0700 | [diff] [blame] | 428 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 429 | struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi); |
| 430 | struct net_device *dev = priv->dev; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 431 | int done; |
| 432 | int t; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 433 | int n, i; |
| 434 | |
| 435 | done = 0; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 436 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 437 | poll_more: |
| 438 | while (done < budget) { |
| 439 | int max = (budget - done); |
| 440 | |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 441 | t = min(IPOIB_NUM_WC, max); |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 442 | n = ib_poll_cq(priv->recv_cq, t, priv->ibwc); |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 443 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 444 | for (i = 0; i < n; i++) { |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 445 | struct ib_wc *wc = priv->ibwc + i; |
| 446 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 447 | if (wc->wr_id & IPOIB_OP_RECV) { |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 448 | ++done; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 449 | if (wc->wr_id & IPOIB_OP_CM) |
| 450 | ipoib_cm_handle_rx_wc(dev, wc); |
| 451 | else |
| 452 | ipoib_ib_handle_rx_wc(dev, wc); |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 453 | } else |
| 454 | ipoib_cm_handle_tx_wc(priv->dev, wc); |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 455 | } |
| 456 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 457 | if (n != t) |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 458 | break; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 459 | } |
| 460 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 461 | if (done < budget) { |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 462 | napi_complete(napi); |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 463 | if (unlikely(ib_req_notify_cq(priv->recv_cq, |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 464 | IB_CQ_NEXT_COMP | |
| 465 | IB_CQ_REPORT_MISSED_EVENTS)) && |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 466 | napi_reschedule(napi)) |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 467 | goto poll_more; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 468 | } |
| 469 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 470 | return done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) |
| 474 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 475 | struct net_device *dev = dev_ptr; |
| 476 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 477 | |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 478 | napi_schedule(&priv->napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | } |
| 480 | |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 481 | static void drain_tx_cq(struct net_device *dev) |
| 482 | { |
| 483 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 484 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 485 | netif_tx_lock(dev); |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 486 | while (poll_tx(priv)) |
| 487 | ; /* nothing */ |
| 488 | |
| 489 | if (netif_queue_stopped(dev)) |
| 490 | mod_timer(&priv->poll_timer, jiffies + 1); |
| 491 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 492 | netif_tx_unlock(dev); |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) |
| 496 | { |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 497 | struct ipoib_dev_priv *priv = netdev_priv(dev_ptr); |
| 498 | |
| 499 | mod_timer(&priv->poll_timer, jiffies); |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 500 | } |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | static inline int post_send(struct ipoib_dev_priv *priv, |
| 503 | unsigned int wr_id, |
| 504 | struct ib_ah *address, u32 qpn, |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 505 | struct ipoib_tx_buf *tx_req, |
| 506 | void *head, int hlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | { |
| 508 | struct ib_send_wr *bad_wr; |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 509 | int i, off; |
| 510 | struct sk_buff *skb = tx_req->skb; |
| 511 | skb_frag_t *frags = skb_shinfo(skb)->frags; |
| 512 | int nr_frags = skb_shinfo(skb)->nr_frags; |
| 513 | u64 *mapping = tx_req->mapping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 515 | if (skb_headlen(skb)) { |
| 516 | priv->tx_sge[0].addr = mapping[0]; |
| 517 | priv->tx_sge[0].length = skb_headlen(skb); |
| 518 | off = 1; |
| 519 | } else |
| 520 | off = 0; |
| 521 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 522 | for (i = 0; i < nr_frags; ++i) { |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 523 | priv->tx_sge[i + off].addr = mapping[i + off]; |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 524 | priv->tx_sge[i + off].length = skb_frag_size(&frags[i]); |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 525 | } |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 526 | priv->tx_wr.num_sge = nr_frags + off; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 527 | priv->tx_wr.wr_id = wr_id; |
| 528 | priv->tx_wr.wr.ud.remote_qpn = qpn; |
| 529 | priv->tx_wr.wr.ud.ah = address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 531 | if (head) { |
| 532 | priv->tx_wr.wr.ud.mss = skb_shinfo(skb)->gso_size; |
| 533 | priv->tx_wr.wr.ud.header = head; |
| 534 | priv->tx_wr.wr.ud.hlen = hlen; |
| 535 | priv->tx_wr.opcode = IB_WR_LSO; |
| 536 | } else |
| 537 | priv->tx_wr.opcode = IB_WR_SEND; |
| 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); |
| 540 | } |
| 541 | |
| 542 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, |
| 543 | struct ipoib_ah *address, u32 qpn) |
| 544 | { |
| 545 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 546 | struct ipoib_tx_buf *tx_req; |
Or Gerlitz | a48f509 | 2010-03-04 13:17:37 +0000 | [diff] [blame] | 547 | int hlen, rc; |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 548 | void *phead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 550 | if (skb_is_gso(skb)) { |
| 551 | hlen = skb_transport_offset(skb) + tcp_hdrlen(skb); |
| 552 | phead = skb->data; |
| 553 | if (unlikely(!skb_pull(skb, hlen))) { |
| 554 | ipoib_warn(priv, "linear data too small\n"); |
| 555 | ++dev->stats.tx_dropped; |
| 556 | ++dev->stats.tx_errors; |
| 557 | dev_kfree_skb_any(skb); |
| 558 | return; |
| 559 | } |
| 560 | } else { |
| 561 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { |
| 562 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", |
| 563 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); |
| 564 | ++dev->stats.tx_dropped; |
| 565 | ++dev->stats.tx_errors; |
| 566 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); |
| 567 | return; |
| 568 | } |
| 569 | phead = NULL; |
| 570 | hlen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", |
| 574 | skb->len, address, qpn); |
| 575 | |
| 576 | /* |
| 577 | * We put the skb into the tx_ring _before_ we call post_send() |
| 578 | * because it's entirely possible that the completion handler will |
| 579 | * run before we execute anything after the post_send(). That |
| 580 | * means we have to make sure everything is properly recorded and |
| 581 | * our state is consistent before we call post_send(). |
| 582 | */ |
Shirley Ma | 0f48525 | 2006-04-10 09:43:58 -0700 | [diff] [blame] | 583 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | tx_req->skb = skb; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 585 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 586 | ++dev->stats.tx_errors; |
Roland Dreier | 73fbe8b | 2006-10-10 12:50:38 -0700 | [diff] [blame] | 587 | dev_kfree_skb_any(skb); |
| 588 | return; |
| 589 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 591 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
| 592 | priv->tx_wr.send_flags |= IB_SEND_IP_CSUM; |
| 593 | else |
| 594 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; |
| 595 | |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 596 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
| 597 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); |
| 598 | if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) |
| 599 | ipoib_warn(priv, "request notify on send CQ failed\n"); |
| 600 | netif_stop_queue(dev); |
| 601 | } |
| 602 | |
Shlomo Pongratz | 7e5a90c | 2013-02-04 15:29:10 +0000 | [diff] [blame^] | 603 | skb_orphan(skb); |
| 604 | skb_dst_drop(skb); |
| 605 | |
Or Gerlitz | a48f509 | 2010-03-04 13:17:37 +0000 | [diff] [blame] | 606 | rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
| 607 | address->ah, qpn, tx_req, phead, hlen); |
| 608 | if (unlikely(rc)) { |
| 609 | ipoib_warn(priv, "post_send failed, error %d\n", rc); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 610 | ++dev->stats.tx_errors; |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 611 | --priv->tx_outstanding; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 612 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | dev_kfree_skb_any(skb); |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 614 | if (netif_queue_stopped(dev)) |
| 615 | netif_wake_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | } else { |
| 617 | dev->trans_start = jiffies; |
| 618 | |
| 619 | address->last_send = priv->tx_head; |
| 620 | ++priv->tx_head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | } |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 622 | |
| 623 | if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 624 | while (poll_tx(priv)) |
| 625 | ; /* nothing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | static void __ipoib_reap_ah(struct net_device *dev) |
| 629 | { |
| 630 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 631 | struct ipoib_ah *ah, *tah; |
| 632 | LIST_HEAD(remove_list); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 633 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 635 | netif_tx_lock_bh(dev); |
| 636 | spin_lock_irqsave(&priv->lock, flags); |
| 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
Roland Dreier | 2181858 | 2005-07-27 14:41:32 -0700 | [diff] [blame] | 639 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | list_del(&ah->list); |
Roland Dreier | 31c02e2 | 2006-06-17 20:37:34 -0700 | [diff] [blame] | 641 | ib_destroy_ah(ah->ah); |
| 642 | kfree(ah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 644 | |
| 645 | spin_unlock_irqrestore(&priv->lock, flags); |
| 646 | netif_tx_unlock_bh(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | } |
| 648 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 649 | void ipoib_reap_ah(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 651 | struct ipoib_dev_priv *priv = |
| 652 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); |
| 653 | struct net_device *dev = priv->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | |
| 655 | __ipoib_reap_ah(dev); |
| 656 | |
| 657 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) |
Anton Blanchard | 69fc507 | 2007-10-15 00:50:56 -0500 | [diff] [blame] | 658 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, |
| 659 | round_jiffies_relative(HZ)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |
| 661 | |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 662 | static void ipoib_ib_tx_timer_func(unsigned long ctx) |
| 663 | { |
| 664 | drain_tx_cq((struct net_device *)ctx); |
| 665 | } |
| 666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | int ipoib_ib_dev_open(struct net_device *dev) |
| 668 | { |
| 669 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 670 | int ret; |
| 671 | |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 672 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) { |
| 673 | ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey); |
| 674 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
| 675 | return -1; |
| 676 | } |
| 677 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
| 678 | |
Roland Dreier | 5b6810e | 2005-10-11 11:08:24 -0700 | [diff] [blame] | 679 | ret = ipoib_init_qp(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | if (ret) { |
Roland Dreier | 5b6810e | 2005-10-11 11:08:24 -0700 | [diff] [blame] | 681 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | return -1; |
| 683 | } |
| 684 | |
| 685 | ret = ipoib_ib_post_receives(dev); |
| 686 | if (ret) { |
| 687 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 688 | ipoib_ib_dev_stop(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | return -1; |
| 690 | } |
| 691 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 692 | ret = ipoib_cm_dev_open(dev); |
| 693 | if (ret) { |
Michael S. Tsirkin | 24bd1e4 | 2007-05-18 16:12:54 +0300 | [diff] [blame] | 694 | ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 695 | ipoib_ib_dev_stop(dev, 1); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 696 | return -1; |
| 697 | } |
| 698 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); |
Anton Blanchard | 69fc507 | 2007-10-15 00:50:56 -0500 | [diff] [blame] | 700 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, |
| 701 | round_jiffies_relative(HZ)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | |
Yossi Etigin | e028cc5 | 2009-04-20 13:58:08 -0700 | [diff] [blame] | 703 | if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
| 704 | napi_enable(&priv->napi); |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return 0; |
| 707 | } |
| 708 | |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 709 | static void ipoib_pkey_dev_check_presence(struct net_device *dev) |
| 710 | { |
| 711 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 712 | u16 pkey_index = 0; |
| 713 | |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 714 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 715 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
| 716 | else |
| 717 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
| 718 | } |
| 719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | int ipoib_ib_dev_up(struct net_device *dev) |
| 721 | { |
| 722 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 723 | |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 724 | ipoib_pkey_dev_check_presence(dev); |
| 725 | |
| 726 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { |
| 727 | ipoib_dbg(priv, "PKEY is not assigned.\n"); |
| 728 | return 0; |
| 729 | } |
| 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
| 732 | |
| 733 | return ipoib_mcast_start_thread(dev); |
| 734 | } |
| 735 | |
Jack Morgenstein | 0b3ea08 | 2006-03-20 10:08:24 -0800 | [diff] [blame] | 736 | int ipoib_ib_dev_down(struct net_device *dev, int flush) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | { |
| 738 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 739 | |
| 740 | ipoib_dbg(priv, "downing ib_dev\n"); |
| 741 | |
| 742 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
| 743 | netif_carrier_off(dev); |
| 744 | |
| 745 | /* Shutdown the P_Key thread if still active */ |
| 746 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 747 | mutex_lock(&pkey_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | set_bit(IPOIB_PKEY_STOP, &priv->flags); |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 749 | cancel_delayed_work(&priv->pkey_poll_task); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 750 | mutex_unlock(&pkey_mutex); |
Jack Morgenstein | 0b3ea08 | 2006-03-20 10:08:24 -0800 | [diff] [blame] | 751 | if (flush) |
| 752 | flush_workqueue(ipoib_workqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | } |
| 754 | |
Jack Morgenstein | 0b3ea08 | 2006-03-20 10:08:24 -0800 | [diff] [blame] | 755 | ipoib_mcast_stop_thread(dev, flush); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | ipoib_mcast_dev_flush(dev); |
| 757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | ipoib_flush_paths(dev); |
| 759 | |
| 760 | return 0; |
| 761 | } |
| 762 | |
| 763 | static int recvs_pending(struct net_device *dev) |
| 764 | { |
| 765 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 766 | int pending = 0; |
| 767 | int i; |
| 768 | |
Shirley Ma | 0f48525 | 2006-04-10 09:43:58 -0700 | [diff] [blame] | 769 | for (i = 0; i < ipoib_recvq_size; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (priv->rx_ring[i].skb) |
| 771 | ++pending; |
| 772 | |
| 773 | return pending; |
| 774 | } |
| 775 | |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 776 | void ipoib_drain_cq(struct net_device *dev) |
| 777 | { |
| 778 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 779 | int i, n; |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 780 | |
| 781 | /* |
| 782 | * We call completion handling routines that expect to be |
| 783 | * called from the BH-disabled NAPI poll context, so disable |
| 784 | * BHs here too. |
| 785 | */ |
| 786 | local_bh_disable(); |
| 787 | |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 788 | do { |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 789 | n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 790 | for (i = 0; i < n; ++i) { |
Roland Dreier | ce423ef | 2007-10-09 19:59:04 -0700 | [diff] [blame] | 791 | /* |
| 792 | * Convert any successful completions to flush |
| 793 | * errors to avoid passing packets up the |
| 794 | * stack after bringing the device down. |
| 795 | */ |
| 796 | if (priv->ibwc[i].status == IB_WC_SUCCESS) |
| 797 | priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; |
| 798 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 799 | if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { |
| 800 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) |
| 801 | ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); |
| 802 | else |
| 803 | ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 804 | } else |
| 805 | ipoib_cm_handle_tx_wc(dev, priv->ibwc + i); |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 806 | } |
| 807 | } while (n == IPOIB_NUM_WC); |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 808 | |
| 809 | while (poll_tx(priv)) |
| 810 | ; /* nothing */ |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 811 | |
| 812 | local_bh_enable(); |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 813 | } |
| 814 | |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 815 | int ipoib_ib_dev_stop(struct net_device *dev, int flush) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | { |
| 817 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 818 | struct ib_qp_attr qp_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | unsigned long begin; |
Roland Dreier | 1993d68 | 2005-10-28 15:30:34 -0700 | [diff] [blame] | 820 | struct ipoib_tx_buf *tx_req; |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 821 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
Yossi Etigin | e028cc5 | 2009-04-20 13:58:08 -0700 | [diff] [blame] | 823 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
| 824 | napi_disable(&priv->napi); |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 825 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 826 | ipoib_cm_dev_stop(dev); |
| 827 | |
Roland Dreier | 3bc12e7 | 2005-10-30 13:20:09 -0800 | [diff] [blame] | 828 | /* |
| 829 | * Move our QP to the error state and then reinitialize in |
| 830 | * when all work requests have completed or have been flushed. |
| 831 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | qp_attr.qp_state = IB_QPS_ERR; |
Roland Dreier | 3bc12e7 | 2005-10-30 13:20:09 -0800 | [diff] [blame] | 833 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); |
| 835 | |
| 836 | /* Wait for all sends and receives to complete */ |
| 837 | begin = jiffies; |
| 838 | |
| 839 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { |
| 840 | if (time_after(jiffies, begin + 5 * HZ)) { |
| 841 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", |
| 842 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); |
| 843 | |
| 844 | /* |
| 845 | * assume the HW is wedged and just free up |
| 846 | * all our pending work requests. |
| 847 | */ |
Roland Dreier | 2181858 | 2005-07-27 14:41:32 -0700 | [diff] [blame] | 848 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | tx_req = &priv->tx_ring[priv->tx_tail & |
Shirley Ma | 0f48525 | 2006-04-10 09:43:58 -0700 | [diff] [blame] | 850 | (ipoib_sendq_size - 1)]; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 851 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | dev_kfree_skb_any(tx_req->skb); |
| 853 | ++priv->tx_tail; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 854 | --priv->tx_outstanding; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | } |
| 856 | |
Ralph Campbell | 37ccf9d | 2006-12-12 14:30:48 -0800 | [diff] [blame] | 857 | for (i = 0; i < ipoib_recvq_size; ++i) { |
| 858 | struct ipoib_rx_buf *rx_req; |
| 859 | |
| 860 | rx_req = &priv->rx_ring[i]; |
| 861 | if (!rx_req->skb) |
| 862 | continue; |
Shirley Ma | bc7b3a3 | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 863 | ipoib_ud_dma_unmap_rx(priv, |
| 864 | priv->rx_ring[i].mapping); |
Ralph Campbell | 37ccf9d | 2006-12-12 14:30:48 -0800 | [diff] [blame] | 865 | dev_kfree_skb_any(rx_req->skb); |
| 866 | rx_req->skb = NULL; |
| 867 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
| 869 | goto timeout; |
| 870 | } |
| 871 | |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 872 | ipoib_drain_cq(dev); |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 873 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | msleep(1); |
| 875 | } |
| 876 | |
| 877 | ipoib_dbg(priv, "All sends and receives done.\n"); |
| 878 | |
| 879 | timeout: |
Eli Cohen | 57ce41d | 2008-04-30 20:02:45 -0700 | [diff] [blame] | 880 | del_timer_sync(&priv->poll_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | qp_attr.qp_state = IB_QPS_RESET; |
Roland Dreier | 3bc12e7 | 2005-10-30 13:20:09 -0800 | [diff] [blame] | 882 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); |
| 884 | |
| 885 | /* Wait for all AHs to be reaped */ |
| 886 | set_bit(IPOIB_STOP_REAPER, &priv->flags); |
| 887 | cancel_delayed_work(&priv->ah_reap_task); |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 888 | if (flush) |
| 889 | flush_workqueue(ipoib_workqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
| 891 | begin = jiffies; |
| 892 | |
| 893 | while (!list_empty(&priv->dead_ahs)) { |
| 894 | __ipoib_reap_ah(dev); |
| 895 | |
| 896 | if (time_after(jiffies, begin + HZ)) { |
| 897 | ipoib_warn(priv, "timing out; will leak address handles\n"); |
| 898 | break; |
| 899 | } |
| 900 | |
| 901 | msleep(1); |
| 902 | } |
| 903 | |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 904 | ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | return 0; |
| 907 | } |
| 908 | |
| 909 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
| 910 | { |
| 911 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 912 | |
| 913 | priv->ca = ca; |
| 914 | priv->port = port; |
| 915 | priv->qp = NULL; |
| 916 | |
| 917 | if (ipoib_transport_dev_init(dev, ca)) { |
| 918 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); |
| 919 | return -ENODEV; |
| 920 | } |
| 921 | |
Roland Dreier | 2767840 | 2008-10-10 15:58:52 -0700 | [diff] [blame] | 922 | setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, |
| 923 | (unsigned long) dev); |
| 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | if (dev->flags & IFF_UP) { |
| 926 | if (ipoib_ib_dev_open(dev)) { |
| 927 | ipoib_transport_dev_cleanup(dev); |
| 928 | return -ENODEV; |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | return 0; |
| 933 | } |
| 934 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 935 | static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, |
| 936 | enum ipoib_flush_level level) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | { |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 938 | struct ipoib_dev_priv *cpriv; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 939 | struct net_device *dev = priv->dev; |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 940 | u16 new_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 942 | mutex_lock(&priv->vlan_mutex); |
| 943 | |
| 944 | /* |
| 945 | * Flush any child interfaces too -- they might be up even if |
| 946 | * the parent is down. |
| 947 | */ |
| 948 | list_for_each_entry(cpriv, &priv->child_intfs, list) |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 949 | __ipoib_ib_dev_flush(cpriv, level); |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 950 | |
| 951 | mutex_unlock(&priv->vlan_mutex); |
| 952 | |
| 953 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 954 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | return; |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
| 959 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); |
| 960 | return; |
| 961 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 963 | if (level == IPOIB_FLUSH_HEAVY) { |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 964 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { |
| 965 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
| 966 | ipoib_ib_dev_down(dev, 0); |
Jack Morgenstein | 167c426 | 2008-02-13 16:23:50 +0200 | [diff] [blame] | 967 | ipoib_ib_dev_stop(dev, 0); |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 968 | if (ipoib_pkey_dev_delay_open(dev)) |
| 969 | return; |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 970 | } |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 971 | |
| 972 | /* restart QP only if P_Key index is changed */ |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 973 | if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && |
| 974 | new_index == priv->pkey_index) { |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 975 | ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); |
| 976 | return; |
| 977 | } |
| 978 | priv->pkey_index = new_index; |
| 979 | } |
| 980 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 981 | if (level == IPOIB_FLUSH_LIGHT) { |
| 982 | ipoib_mark_paths_invalid(dev); |
| 983 | ipoib_mcast_dev_flush(dev); |
| 984 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 986 | if (level >= IPOIB_FLUSH_NORMAL) |
| 987 | ipoib_ib_dev_down(dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 989 | if (level == IPOIB_FLUSH_HEAVY) { |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 990 | ipoib_ib_dev_stop(dev, 0); |
| 991 | ipoib_ib_dev_open(dev); |
| 992 | } |
| 993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | /* |
| 995 | * The device could have been brought down between the start and when |
| 996 | * we get here, don't bring it back up if it's not configured up |
| 997 | */ |
Eli Cohen | 5ccd025 | 2006-09-22 15:22:56 -0700 | [diff] [blame] | 998 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 999 | if (level >= IPOIB_FLUSH_NORMAL) |
| 1000 | ipoib_ib_dev_up(dev); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1001 | ipoib_mcast_restart_task(&priv->restart_task); |
Eli Cohen | 5ccd025 | 2006-09-22 15:22:56 -0700 | [diff] [blame] | 1002 | } |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1003 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 1005 | void ipoib_ib_dev_flush_light(struct work_struct *work) |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1006 | { |
| 1007 | struct ipoib_dev_priv *priv = |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 1008 | container_of(work, struct ipoib_dev_priv, flush_light); |
Michael S. Tsirkin | 4f71055 | 2005-11-29 10:53:30 -0800 | [diff] [blame] | 1009 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 1010 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT); |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1011 | } |
Michael S. Tsirkin | 4f71055 | 2005-11-29 10:53:30 -0800 | [diff] [blame] | 1012 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 1013 | void ipoib_ib_dev_flush_normal(struct work_struct *work) |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1014 | { |
| 1015 | struct ipoib_dev_priv *priv = |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 1016 | container_of(work, struct ipoib_dev_priv, flush_normal); |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1017 | |
Moni Shoua | ee1e2c8 | 2008-07-14 23:48:49 -0700 | [diff] [blame] | 1018 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL); |
| 1019 | } |
| 1020 | |
| 1021 | void ipoib_ib_dev_flush_heavy(struct work_struct *work) |
| 1022 | { |
| 1023 | struct ipoib_dev_priv *priv = |
| 1024 | container_of(work, struct ipoib_dev_priv, flush_heavy); |
| 1025 | |
| 1026 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | void ipoib_ib_dev_cleanup(struct net_device *dev) |
| 1030 | { |
| 1031 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1032 | |
| 1033 | ipoib_dbg(priv, "cleaning up ib_dev\n"); |
| 1034 | |
Roland Dreier | 8d2cae0 | 2005-09-20 10:52:04 -0700 | [diff] [blame] | 1035 | ipoib_mcast_stop_thread(dev, 1); |
Eli Cohen | 988bd50 | 2006-01-12 14:32:20 -0800 | [diff] [blame] | 1036 | ipoib_mcast_dev_flush(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | |
| 1038 | ipoib_transport_dev_cleanup(dev); |
| 1039 | } |
| 1040 | |
| 1041 | /* |
| 1042 | * Delayed P_Key Assigment Interim Support |
| 1043 | * |
| 1044 | * The following is initial implementation of delayed P_Key assigment |
| 1045 | * mechanism. It is using the same approach implemented for the multicast |
| 1046 | * group join. The single goal of this implementation is to quickly address |
| 1047 | * Bug #2507. This implementation will probably be removed when the P_Key |
| 1048 | * change async notification is available. |
| 1049 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1051 | void ipoib_pkey_poll(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1053 | struct ipoib_dev_priv *priv = |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1054 | container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1055 | struct net_device *dev = priv->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
| 1057 | ipoib_pkey_dev_check_presence(dev); |
| 1058 | |
| 1059 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) |
| 1060 | ipoib_open(dev); |
| 1061 | else { |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 1062 | mutex_lock(&pkey_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) |
| 1064 | queue_delayed_work(ipoib_workqueue, |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1065 | &priv->pkey_poll_task, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | HZ); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 1067 | mutex_unlock(&pkey_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | } |
| 1069 | } |
| 1070 | |
| 1071 | int ipoib_pkey_dev_delay_open(struct net_device *dev) |
| 1072 | { |
| 1073 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1074 | |
| 1075 | /* Look for the interface pkey value in the IB Port P_Key table and */ |
| 1076 | /* set the interface pkey assigment flag */ |
| 1077 | ipoib_pkey_dev_check_presence(dev); |
| 1078 | |
| 1079 | /* P_Key value not assigned yet - start polling */ |
| 1080 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 1081 | mutex_lock(&pkey_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | clear_bit(IPOIB_PKEY_STOP, &priv->flags); |
| 1083 | queue_delayed_work(ipoib_workqueue, |
Yosef Etigin | 26bbf13 | 2007-05-19 08:51:54 -0700 | [diff] [blame] | 1084 | &priv->pkey_poll_task, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | HZ); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 1086 | mutex_unlock(&pkey_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | return 1; |
| 1088 | } |
| 1089 | |
| 1090 | return 0; |
| 1091 | } |