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