Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2006 Mellanox Technologies. All rights reserved |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 31 | */ |
| 32 | |
| 33 | #include <rdma/ib_cm.h> |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 34 | #include <net/dst.h> |
| 35 | #include <net/icmp.h> |
| 36 | #include <linux/icmpv6.h> |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 37 | #include <linux/delay.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 39 | #include <linux/vmalloc.h> |
Paul Gortmaker | fec14d2 | 2011-08-30 12:32:52 -0400 | [diff] [blame] | 40 | #include <linux/moduleparam.h> |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 41 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 42 | #include "ipoib.h" |
| 43 | |
| 44 | int ipoib_max_conn_qp = 128; |
| 45 | |
| 46 | module_param_named(max_nonsrq_conn_qp, ipoib_max_conn_qp, int, 0444); |
| 47 | MODULE_PARM_DESC(max_nonsrq_conn_qp, |
| 48 | "Max number of connected-mode QPs per interface " |
| 49 | "(applied only if shared receive queue is not available)"); |
| 50 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 51 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA |
| 52 | static int data_debug_level; |
| 53 | |
| 54 | module_param_named(cm_data_debug_level, data_debug_level, int, 0644); |
| 55 | MODULE_PARM_DESC(cm_data_debug_level, |
| 56 | "Enable data path debug tracing for connected mode if > 0"); |
| 57 | #endif |
| 58 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 59 | #define IPOIB_CM_IETF_ID 0x1000000000000000ULL |
| 60 | |
| 61 | #define IPOIB_CM_RX_UPDATE_TIME (256 * HZ) |
| 62 | #define IPOIB_CM_RX_TIMEOUT (2 * 256 * HZ) |
| 63 | #define IPOIB_CM_RX_DELAY (3 * 256 * HZ) |
| 64 | #define IPOIB_CM_RX_UPDATE_MASK (0x3) |
| 65 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 66 | static struct ib_qp_attr ipoib_cm_err_attr = { |
| 67 | .qp_state = IB_QPS_ERR |
| 68 | }; |
| 69 | |
Roland Dreier | 09f60f8 | 2007-10-26 13:44:25 -0700 | [diff] [blame] | 70 | #define IPOIB_CM_RX_DRAIN_WRID 0xffffffff |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 71 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 72 | static struct ib_send_wr ipoib_cm_rx_drain_wr = { |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 73 | .opcode = IB_WR_SEND, |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 74 | }; |
| 75 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 76 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
| 77 | struct ib_cm_event *event); |
| 78 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 79 | static void ipoib_cm_dma_unmap_rx(struct ipoib_dev_priv *priv, int frags, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 80 | u64 mapping[IPOIB_CM_RX_SG]) |
| 81 | { |
| 82 | int i; |
| 83 | |
| 84 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); |
| 85 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 86 | for (i = 0; i < frags; ++i) |
Dotan Barak | 787adb9 | 2011-10-18 15:22:14 +0200 | [diff] [blame] | 87 | ib_dma_unmap_page(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 88 | } |
| 89 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 90 | static int ipoib_cm_post_receive_srq(struct net_device *dev, int id) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 91 | { |
| 92 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 93 | struct ib_recv_wr *bad_wr; |
| 94 | int i, ret; |
| 95 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 96 | priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 97 | |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 98 | for (i = 0; i < priv->cm.num_frags; ++i) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 99 | priv->cm.rx_sge[i].addr = priv->cm.srq_ring[id].mapping[i]; |
| 100 | |
| 101 | ret = ib_post_srq_recv(priv->cm.srq, &priv->cm.rx_wr, &bad_wr); |
| 102 | if (unlikely(ret)) { |
| 103 | ipoib_warn(priv, "post srq failed for buf %d (%d)\n", id, ret); |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 104 | ipoib_cm_dma_unmap_rx(priv, priv->cm.num_frags - 1, |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 105 | priv->cm.srq_ring[id].mapping); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 106 | dev_kfree_skb_any(priv->cm.srq_ring[id].skb); |
| 107 | priv->cm.srq_ring[id].skb = NULL; |
| 108 | } |
| 109 | |
| 110 | return ret; |
| 111 | } |
| 112 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 113 | static int ipoib_cm_post_receive_nonsrq(struct net_device *dev, |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 114 | struct ipoib_cm_rx *rx, |
| 115 | struct ib_recv_wr *wr, |
| 116 | struct ib_sge *sge, int id) |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 117 | { |
| 118 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 119 | struct ib_recv_wr *bad_wr; |
| 120 | int i, ret; |
| 121 | |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 122 | wr->wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 123 | |
| 124 | for (i = 0; i < IPOIB_CM_RX_SG; ++i) |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 125 | sge[i].addr = rx->rx_ring[id].mapping[i]; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 126 | |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 127 | ret = ib_post_recv(rx->qp, wr, &bad_wr); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 128 | if (unlikely(ret)) { |
| 129 | ipoib_warn(priv, "post recv failed for buf %d (%d)\n", id, ret); |
| 130 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, |
| 131 | rx->rx_ring[id].mapping); |
| 132 | dev_kfree_skb_any(rx->rx_ring[id].skb); |
| 133 | rx->rx_ring[id].skb = NULL; |
| 134 | } |
| 135 | |
| 136 | return ret; |
| 137 | } |
| 138 | |
| 139 | static struct sk_buff *ipoib_cm_alloc_rx_skb(struct net_device *dev, |
| 140 | struct ipoib_cm_rx_buf *rx_ring, |
| 141 | int id, int frags, |
Tal Alon | 22252b4 | 2013-10-16 17:37:48 +0300 | [diff] [blame] | 142 | u64 mapping[IPOIB_CM_RX_SG], |
| 143 | gfp_t gfp) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 144 | { |
| 145 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 146 | struct sk_buff *skb; |
| 147 | int i; |
| 148 | |
| 149 | skb = dev_alloc_skb(IPOIB_CM_HEAD_SIZE + 12); |
| 150 | if (unlikely(!skb)) |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 151 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 152 | |
| 153 | /* |
| 154 | * IPoIB adds a 4 byte header. So we need 12 more bytes to align the |
| 155 | * IP header to a multiple of 16. |
| 156 | */ |
| 157 | skb_reserve(skb, 12); |
| 158 | |
| 159 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, IPOIB_CM_HEAD_SIZE, |
| 160 | DMA_FROM_DEVICE); |
| 161 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) { |
| 162 | dev_kfree_skb_any(skb); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 163 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 164 | } |
| 165 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 166 | for (i = 0; i < frags; i++) { |
Tal Alon | 22252b4 | 2013-10-16 17:37:48 +0300 | [diff] [blame] | 167 | struct page *page = alloc_page(gfp); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 168 | |
| 169 | if (!page) |
| 170 | goto partial_error; |
| 171 | skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE); |
| 172 | |
Ian Campbell | 5581be3 | 2011-08-24 22:28:10 +0000 | [diff] [blame] | 173 | mapping[i + 1] = ib_dma_map_page(priv->ca, page, |
Michael S. Tsirkin | 6371ea3 | 2007-04-10 18:32:42 +0300 | [diff] [blame] | 174 | 0, PAGE_SIZE, DMA_FROM_DEVICE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 175 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[i + 1]))) |
| 176 | goto partial_error; |
| 177 | } |
| 178 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 179 | rx_ring[id].skb = skb; |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 180 | return skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 181 | |
| 182 | partial_error: |
| 183 | |
| 184 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); |
| 185 | |
Ralph Campbell | 841adfc | 2007-06-29 11:37:56 -0700 | [diff] [blame] | 186 | for (; i > 0; --i) |
Dotan Barak | 787adb9 | 2011-10-18 15:22:14 +0200 | [diff] [blame] | 187 | ib_dma_unmap_page(priv->ca, mapping[i], PAGE_SIZE, DMA_FROM_DEVICE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 188 | |
Michael S. Tsirkin | 8a2e65f | 2007-02-16 00:16:13 +0200 | [diff] [blame] | 189 | dev_kfree_skb_any(skb); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 190 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 191 | } |
| 192 | |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 193 | static void ipoib_cm_free_rx_ring(struct net_device *dev, |
| 194 | struct ipoib_cm_rx_buf *rx_ring) |
| 195 | { |
| 196 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 197 | int i; |
| 198 | |
| 199 | for (i = 0; i < ipoib_recvq_size; ++i) |
| 200 | if (rx_ring[i].skb) { |
| 201 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, |
| 202 | rx_ring[i].mapping); |
| 203 | dev_kfree_skb_any(rx_ring[i].skb); |
| 204 | } |
| 205 | |
David J. Wilder | b140406 | 2008-08-08 15:51:29 -0700 | [diff] [blame] | 206 | vfree(rx_ring); |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 207 | } |
| 208 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 209 | static void ipoib_cm_start_rx_drain(struct ipoib_dev_priv *priv) |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 210 | { |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 211 | struct ib_send_wr *bad_wr; |
| 212 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 213 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 214 | /* We only reserved 1 extra slot in CQ for drain WRs, so |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 215 | * make sure we have at most 1 outstanding WR. */ |
| 216 | if (list_empty(&priv->cm.rx_flush_list) || |
| 217 | !list_empty(&priv->cm.rx_drain_list)) |
| 218 | return; |
| 219 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 220 | /* |
| 221 | * QPs on flush list are error state. This way, a "flush |
| 222 | * error" WC will be immediately generated for each WR we post. |
| 223 | */ |
| 224 | p = list_entry(priv->cm.rx_flush_list.next, typeof(*p), list); |
Christoph Hellwig | 14d3a3b | 2015-12-11 11:53:03 -0800 | [diff] [blame] | 225 | ipoib_cm_rx_drain_wr.wr_id = IPOIB_CM_RX_DRAIN_WRID; |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 226 | if (ib_post_send(p->qp, &ipoib_cm_rx_drain_wr, &bad_wr)) |
| 227 | ipoib_warn(priv, "failed to post drain wr\n"); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 228 | |
| 229 | list_splice_init(&priv->cm.rx_flush_list, &priv->cm.rx_drain_list); |
| 230 | } |
| 231 | |
| 232 | static void ipoib_cm_rx_event_handler(struct ib_event *event, void *ctx) |
| 233 | { |
| 234 | struct ipoib_cm_rx *p = ctx; |
| 235 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 236 | unsigned long flags; |
| 237 | |
| 238 | if (event->event != IB_EVENT_QP_LAST_WQE_REACHED) |
| 239 | return; |
| 240 | |
| 241 | spin_lock_irqsave(&priv->lock, flags); |
| 242 | list_move(&p->list, &priv->cm.rx_flush_list); |
| 243 | p->state = IPOIB_CM_RX_FLUSH; |
| 244 | ipoib_cm_start_rx_drain(priv); |
| 245 | spin_unlock_irqrestore(&priv->lock, flags); |
| 246 | } |
| 247 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 248 | static struct ib_qp *ipoib_cm_create_rx_qp(struct net_device *dev, |
| 249 | struct ipoib_cm_rx *p) |
| 250 | { |
| 251 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 252 | struct ib_qp_init_attr attr = { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 253 | .event_handler = ipoib_cm_rx_event_handler, |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 254 | .send_cq = priv->recv_cq, /* For drain WR */ |
| 255 | .recv_cq = priv->recv_cq, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 256 | .srq = priv->cm.srq, |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 257 | .cap.max_send_wr = 1, /* For drain WR */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 258 | .cap.max_send_sge = 1, /* FIXME: 0 Seems not to work */ |
| 259 | .sq_sig_type = IB_SIGNAL_ALL_WR, |
| 260 | .qp_type = IB_QPT_RC, |
| 261 | .qp_context = p, |
| 262 | }; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 263 | |
| 264 | if (!ipoib_cm_has_srq(dev)) { |
| 265 | attr.cap.max_recv_wr = ipoib_recvq_size; |
| 266 | attr.cap.max_recv_sge = IPOIB_CM_RX_SG; |
| 267 | } |
| 268 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 269 | return ib_create_qp(priv->pd, &attr); |
| 270 | } |
| 271 | |
| 272 | static int ipoib_cm_modify_rx_qp(struct net_device *dev, |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 273 | struct ib_cm_id *cm_id, struct ib_qp *qp, |
| 274 | unsigned psn) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 275 | { |
| 276 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 277 | struct ib_qp_attr qp_attr; |
| 278 | int qp_attr_mask, ret; |
| 279 | |
| 280 | qp_attr.qp_state = IB_QPS_INIT; |
| 281 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 282 | if (ret) { |
| 283 | ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); |
| 284 | return ret; |
| 285 | } |
| 286 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 287 | if (ret) { |
| 288 | ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); |
| 289 | return ret; |
| 290 | } |
| 291 | qp_attr.qp_state = IB_QPS_RTR; |
| 292 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 293 | if (ret) { |
| 294 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); |
| 295 | return ret; |
| 296 | } |
| 297 | qp_attr.rq_psn = psn; |
| 298 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 299 | if (ret) { |
| 300 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); |
| 301 | return ret; |
| 302 | } |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 303 | |
| 304 | /* |
| 305 | * Current Mellanox HCA firmware won't generate completions |
| 306 | * with error for drain WRs unless the QP has been moved to |
| 307 | * RTS first. This work-around leaves a window where a QP has |
| 308 | * moved to error asynchronously, but this will eventually get |
| 309 | * fixed in firmware, so let's not error out if modify QP |
| 310 | * fails. |
| 311 | */ |
| 312 | qp_attr.qp_state = IB_QPS_RTS; |
| 313 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 314 | if (ret) { |
| 315 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); |
| 316 | return 0; |
| 317 | } |
| 318 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 319 | if (ret) { |
| 320 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); |
| 321 | return 0; |
| 322 | } |
| 323 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 324 | return 0; |
| 325 | } |
| 326 | |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 327 | static void ipoib_cm_init_rx_wr(struct net_device *dev, |
| 328 | struct ib_recv_wr *wr, |
| 329 | struct ib_sge *sge) |
| 330 | { |
| 331 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 332 | int i; |
| 333 | |
| 334 | for (i = 0; i < priv->cm.num_frags; ++i) |
Jason Gunthorpe | 77b1f99 | 2015-07-30 17:22:17 -0600 | [diff] [blame] | 335 | sge[i].lkey = priv->pd->local_dma_lkey; |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 336 | |
| 337 | sge[0].length = IPOIB_CM_HEAD_SIZE; |
| 338 | for (i = 1; i < priv->cm.num_frags; ++i) |
| 339 | sge[i].length = PAGE_SIZE; |
| 340 | |
| 341 | wr->next = NULL; |
Roland Dreier | e081981 | 2008-07-30 07:21:46 -0700 | [diff] [blame] | 342 | wr->sg_list = sge; |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 343 | wr->num_sge = priv->cm.num_frags; |
| 344 | } |
| 345 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 346 | static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_id, |
| 347 | struct ipoib_cm_rx *rx) |
| 348 | { |
| 349 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 350 | struct { |
| 351 | struct ib_recv_wr wr; |
| 352 | struct ib_sge sge[IPOIB_CM_RX_SG]; |
| 353 | } *t; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 354 | int ret; |
| 355 | int i; |
| 356 | |
Joe Perches | 948579c | 2010-11-05 03:07:36 +0000 | [diff] [blame] | 357 | rx->rx_ring = vzalloc(ipoib_recvq_size * sizeof *rx->rx_ring); |
David J. Wilder | b140406 | 2008-08-08 15:51:29 -0700 | [diff] [blame] | 358 | if (!rx->rx_ring) { |
| 359 | printk(KERN_WARNING "%s: failed to allocate CM non-SRQ ring (%d entries)\n", |
| 360 | priv->ca->name, ipoib_recvq_size); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 361 | return -ENOMEM; |
David J. Wilder | b140406 | 2008-08-08 15:51:29 -0700 | [diff] [blame] | 362 | } |
| 363 | |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 364 | t = kmalloc(sizeof *t, GFP_KERNEL); |
| 365 | if (!t) { |
| 366 | ret = -ENOMEM; |
| 367 | goto err_free; |
| 368 | } |
| 369 | |
| 370 | ipoib_cm_init_rx_wr(dev, &t->wr, t->sge); |
| 371 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 372 | spin_lock_irq(&priv->lock); |
| 373 | |
| 374 | if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) { |
| 375 | spin_unlock_irq(&priv->lock); |
| 376 | ib_send_cm_rej(cm_id, IB_CM_REJ_NO_QP, NULL, 0, NULL, 0); |
| 377 | ret = -EINVAL; |
| 378 | goto err_free; |
| 379 | } else |
| 380 | ++priv->cm.nonsrq_conn_qp; |
| 381 | |
| 382 | spin_unlock_irq(&priv->lock); |
| 383 | |
| 384 | for (i = 0; i < ipoib_recvq_size; ++i) { |
| 385 | if (!ipoib_cm_alloc_rx_skb(dev, rx->rx_ring, i, IPOIB_CM_RX_SG - 1, |
Tal Alon | 22252b4 | 2013-10-16 17:37:48 +0300 | [diff] [blame] | 386 | rx->rx_ring[i].mapping, |
| 387 | GFP_KERNEL)) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 388 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
Bart Van Assche | 8f71c1a | 2015-05-05 13:01:39 +0200 | [diff] [blame] | 389 | ret = -ENOMEM; |
| 390 | goto err_count; |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 391 | } |
| 392 | ret = ipoib_cm_post_receive_nonsrq(dev, rx, &t->wr, t->sge, i); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 393 | if (ret) { |
| 394 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq " |
| 395 | "failed for buf %d\n", i); |
| 396 | ret = -EIO; |
| 397 | goto err_count; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | rx->recv_count = ipoib_recvq_size; |
| 402 | |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 403 | kfree(t); |
| 404 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 405 | return 0; |
| 406 | |
| 407 | err_count: |
| 408 | spin_lock_irq(&priv->lock); |
| 409 | --priv->cm.nonsrq_conn_qp; |
| 410 | spin_unlock_irq(&priv->lock); |
| 411 | |
| 412 | err_free: |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 413 | kfree(t); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 414 | ipoib_cm_free_rx_ring(dev, rx->rx_ring); |
| 415 | |
| 416 | return ret; |
| 417 | } |
| 418 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 419 | static int ipoib_cm_send_rep(struct net_device *dev, struct ib_cm_id *cm_id, |
| 420 | struct ib_qp *qp, struct ib_cm_req_event_param *req, |
| 421 | unsigned psn) |
| 422 | { |
| 423 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 424 | struct ipoib_cm_data data = {}; |
| 425 | struct ib_cm_rep_param rep = {}; |
| 426 | |
| 427 | data.qpn = cpu_to_be32(priv->qp->qp_num); |
| 428 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); |
| 429 | |
| 430 | rep.private_data = &data; |
| 431 | rep.private_data_len = sizeof data; |
| 432 | rep.flow_control = 0; |
| 433 | rep.rnr_retry_count = req->rnr_retry_count; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 434 | rep.srq = ipoib_cm_has_srq(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 435 | rep.qp_num = qp->qp_num; |
| 436 | rep.starting_psn = psn; |
| 437 | return ib_send_cm_rep(cm_id, &rep); |
| 438 | } |
| 439 | |
| 440 | static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) |
| 441 | { |
| 442 | struct net_device *dev = cm_id->context; |
| 443 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 444 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 445 | unsigned psn; |
| 446 | int ret; |
| 447 | |
| 448 | ipoib_dbg(priv, "REQ arrived\n"); |
| 449 | p = kzalloc(sizeof *p, GFP_KERNEL); |
| 450 | if (!p) |
| 451 | return -ENOMEM; |
| 452 | p->dev = dev; |
| 453 | p->id = cm_id; |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 454 | cm_id->context = p; |
| 455 | p->state = IPOIB_CM_RX_LIVE; |
| 456 | p->jiffies = jiffies; |
| 457 | INIT_LIST_HEAD(&p->list); |
| 458 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 459 | p->qp = ipoib_cm_create_rx_qp(dev, p); |
| 460 | if (IS_ERR(p->qp)) { |
| 461 | ret = PTR_ERR(p->qp); |
| 462 | goto err_qp; |
| 463 | } |
| 464 | |
Andrew Morton | 50bea5c | 2013-05-07 16:18:16 -0700 | [diff] [blame] | 465 | psn = prandom_u32() & 0xffffff; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 466 | ret = ipoib_cm_modify_rx_qp(dev, cm_id, p->qp, psn); |
| 467 | if (ret) |
| 468 | goto err_modify; |
| 469 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 470 | if (!ipoib_cm_has_srq(dev)) { |
| 471 | ret = ipoib_cm_nonsrq_init_rx(dev, cm_id, p); |
| 472 | if (ret) |
| 473 | goto err_modify; |
| 474 | } |
| 475 | |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 476 | spin_lock_irq(&priv->lock); |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 477 | queue_delayed_work(priv->wq, |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 478 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
| 479 | /* Add this entry to passive ids list head, but do not re-add it |
| 480 | * if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */ |
| 481 | p->jiffies = jiffies; |
| 482 | if (p->state == IPOIB_CM_RX_LIVE) |
| 483 | list_move(&p->list, &priv->cm.passive_ids); |
| 484 | spin_unlock_irq(&priv->lock); |
| 485 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 486 | ret = ipoib_cm_send_rep(dev, cm_id, p->qp, &event->param.req_rcvd, psn); |
| 487 | if (ret) { |
| 488 | ipoib_warn(priv, "failed to send REP: %d\n", ret); |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 489 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
| 490 | ipoib_warn(priv, "unable to move qp to error state\n"); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 491 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 492 | return 0; |
| 493 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 494 | err_modify: |
| 495 | ib_destroy_qp(p->qp); |
| 496 | err_qp: |
| 497 | kfree(p); |
| 498 | return ret; |
| 499 | } |
| 500 | |
| 501 | static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, |
| 502 | struct ib_cm_event *event) |
| 503 | { |
| 504 | struct ipoib_cm_rx *p; |
| 505 | struct ipoib_dev_priv *priv; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 506 | |
| 507 | switch (event->event) { |
| 508 | case IB_CM_REQ_RECEIVED: |
| 509 | return ipoib_cm_req_handler(cm_id, event); |
| 510 | case IB_CM_DREQ_RECEIVED: |
| 511 | p = cm_id->context; |
| 512 | ib_send_cm_drep(cm_id, NULL, 0); |
| 513 | /* Fall through */ |
| 514 | case IB_CM_REJ_RECEIVED: |
| 515 | p = cm_id->context; |
| 516 | priv = netdev_priv(p->dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 517 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
| 518 | ipoib_warn(priv, "unable to move qp to error state\n"); |
| 519 | /* Fall through */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 520 | default: |
| 521 | return 0; |
| 522 | } |
| 523 | } |
| 524 | /* Adjust length of skb with fragments to match received data */ |
| 525 | static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space, |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 526 | unsigned int length, struct sk_buff *toskb) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 527 | { |
| 528 | int i, num_frags; |
| 529 | unsigned int size; |
| 530 | |
| 531 | /* put header into skb */ |
| 532 | size = min(length, hdr_space); |
| 533 | skb->tail += size; |
| 534 | skb->len += size; |
| 535 | length -= size; |
| 536 | |
| 537 | num_frags = skb_shinfo(skb)->nr_frags; |
| 538 | for (i = 0; i < num_frags; i++) { |
| 539 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 540 | |
| 541 | if (length == 0) { |
| 542 | /* don't need this page */ |
Ian Campbell | 5581be3 | 2011-08-24 22:28:10 +0000 | [diff] [blame] | 543 | skb_fill_page_desc(toskb, i, skb_frag_page(frag), |
| 544 | 0, PAGE_SIZE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 545 | --skb_shinfo(skb)->nr_frags; |
| 546 | } else { |
| 547 | size = min(length, (unsigned) PAGE_SIZE); |
| 548 | |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 549 | skb_frag_size_set(frag, size); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 550 | skb->data_len += size; |
| 551 | skb->truesize += size; |
| 552 | skb->len += size; |
| 553 | length -= size; |
| 554 | } |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
| 559 | { |
| 560 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 561 | struct ipoib_cm_rx_buf *rx_ring; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 562 | unsigned int wr_id = wc->wr_id & ~(IPOIB_OP_CM | IPOIB_OP_RECV); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 563 | struct sk_buff *skb, *newskb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 564 | struct ipoib_cm_rx *p; |
| 565 | unsigned long flags; |
| 566 | u64 mapping[IPOIB_CM_RX_SG]; |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 567 | int frags; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 568 | int has_srq; |
Eli Cohen | f89271da | 2008-07-14 23:48:44 -0700 | [diff] [blame] | 569 | struct sk_buff *small_skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 570 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 571 | ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n", |
| 572 | wr_id, wc->status); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 573 | |
| 574 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 575 | if (wr_id == (IPOIB_CM_RX_DRAIN_WRID & ~(IPOIB_OP_CM | IPOIB_OP_RECV))) { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 576 | spin_lock_irqsave(&priv->lock, flags); |
| 577 | list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list); |
| 578 | ipoib_cm_start_rx_drain(priv); |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 579 | queue_work(priv->wq, &priv->cm.rx_reap_task); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 580 | spin_unlock_irqrestore(&priv->lock, flags); |
| 581 | } else |
| 582 | ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", |
| 583 | wr_id, ipoib_recvq_size); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 584 | return; |
| 585 | } |
| 586 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 587 | p = wc->qp->qp_context; |
| 588 | |
| 589 | has_srq = ipoib_cm_has_srq(dev); |
| 590 | rx_ring = has_srq ? priv->cm.srq_ring : p->rx_ring; |
| 591 | |
| 592 | skb = rx_ring[wr_id].skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 593 | |
| 594 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
| 595 | ipoib_dbg(priv, "cm recv error " |
| 596 | "(status=%d, wrid=%d vend_err %x)\n", |
| 597 | wc->status, wr_id, wc->vendor_err); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 598 | ++dev->stats.rx_dropped; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 599 | if (has_srq) |
| 600 | goto repost; |
| 601 | else { |
| 602 | if (!--p->recv_count) { |
| 603 | spin_lock_irqsave(&priv->lock, flags); |
| 604 | list_move(&p->list, &priv->cm.rx_reap_list); |
| 605 | spin_unlock_irqrestore(&priv->lock, flags); |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 606 | queue_work(priv->wq, &priv->cm.rx_reap_task); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 607 | } |
| 608 | return; |
| 609 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 610 | } |
| 611 | |
Roland Dreier | fd31256 | 2007-10-17 21:54:44 -0700 | [diff] [blame] | 612 | if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) { |
Michael S. Tsirkin | d6ef7d6 | 2007-05-02 15:31:12 +0300 | [diff] [blame] | 613 | if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 614 | spin_lock_irqsave(&priv->lock, flags); |
| 615 | p->jiffies = jiffies; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 616 | /* Move this entry to list head, but do not re-add it |
| 617 | * if it has been moved out of list. */ |
| 618 | if (p->state == IPOIB_CM_RX_LIVE) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 619 | list_move(&p->list, &priv->cm.passive_ids); |
| 620 | spin_unlock_irqrestore(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 621 | } |
| 622 | } |
| 623 | |
Eli Cohen | f89271da | 2008-07-14 23:48:44 -0700 | [diff] [blame] | 624 | if (wc->byte_len < IPOIB_CM_COPYBREAK) { |
| 625 | int dlen = wc->byte_len; |
| 626 | |
| 627 | small_skb = dev_alloc_skb(dlen + 12); |
| 628 | if (small_skb) { |
| 629 | skb_reserve(small_skb, 12); |
| 630 | ib_dma_sync_single_for_cpu(priv->ca, rx_ring[wr_id].mapping[0], |
| 631 | dlen, DMA_FROM_DEVICE); |
| 632 | skb_copy_from_linear_data(skb, small_skb->data, dlen); |
| 633 | ib_dma_sync_single_for_device(priv->ca, rx_ring[wr_id].mapping[0], |
| 634 | dlen, DMA_FROM_DEVICE); |
| 635 | skb_put(small_skb, dlen); |
| 636 | skb = small_skb; |
| 637 | goto copied; |
| 638 | } |
| 639 | } |
| 640 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 641 | frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len, |
| 642 | (unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE; |
| 643 | |
Tal Alon | 22252b4 | 2013-10-16 17:37:48 +0300 | [diff] [blame] | 644 | newskb = ipoib_cm_alloc_rx_skb(dev, rx_ring, wr_id, frags, |
| 645 | mapping, GFP_ATOMIC); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 646 | if (unlikely(!newskb)) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 647 | /* |
| 648 | * If we can't allocate a new RX buffer, dump |
| 649 | * this packet and reuse the old buffer. |
| 650 | */ |
| 651 | ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 652 | ++dev->stats.rx_dropped; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 653 | goto repost; |
| 654 | } |
| 655 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 656 | ipoib_cm_dma_unmap_rx(priv, frags, rx_ring[wr_id].mapping); |
| 657 | memcpy(rx_ring[wr_id].mapping, mapping, (frags + 1) * sizeof *mapping); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 658 | |
| 659 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", |
| 660 | wc->byte_len, wc->slid); |
| 661 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 662 | skb_put_frags(skb, IPOIB_CM_HEAD_SIZE, wc->byte_len, newskb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 663 | |
Eli Cohen | f89271da | 2008-07-14 23:48:44 -0700 | [diff] [blame] | 664 | copied: |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 665 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 666 | skb_reset_mac_header(skb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 667 | skb_pull(skb, IPOIB_ENCAP_LEN); |
| 668 | |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 669 | ++dev->stats.rx_packets; |
| 670 | dev->stats.rx_bytes += skb->len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 671 | |
| 672 | skb->dev = dev; |
| 673 | /* XXX get correct PACKET_ type here */ |
| 674 | skb->pkt_type = PACKET_HOST; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 675 | netif_receive_skb(skb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 676 | |
| 677 | repost: |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 678 | if (has_srq) { |
| 679 | if (unlikely(ipoib_cm_post_receive_srq(dev, wr_id))) |
| 680 | ipoib_warn(priv, "ipoib_cm_post_receive_srq failed " |
| 681 | "for buf %d\n", wr_id); |
| 682 | } else { |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 683 | if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p, |
| 684 | &priv->cm.rx_wr, |
| 685 | priv->cm.rx_sge, |
| 686 | wr_id))) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 687 | --p->recv_count; |
| 688 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed " |
| 689 | "for buf %d\n", wr_id); |
| 690 | } |
| 691 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | static inline int post_send(struct ipoib_dev_priv *priv, |
| 695 | struct ipoib_cm_tx *tx, |
| 696 | unsigned int wr_id, |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 697 | struct ipoib_tx_buf *tx_req) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 698 | { |
| 699 | struct ib_send_wr *bad_wr; |
| 700 | |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 701 | ipoib_build_sge(priv, tx_req); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 702 | |
Christoph Hellwig | e622f2f | 2015-10-08 09:16:33 +0100 | [diff] [blame] | 703 | priv->tx_wr.wr.wr_id = wr_id | IPOIB_OP_CM; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 704 | |
Christoph Hellwig | e622f2f | 2015-10-08 09:16:33 +0100 | [diff] [blame] | 705 | return ib_post_send(tx->qp, &priv->tx_wr.wr, &bad_wr); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 706 | } |
| 707 | |
| 708 | void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx) |
| 709 | { |
| 710 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 711 | struct ipoib_tx_buf *tx_req; |
Or Gerlitz | a48f509 | 2010-03-04 13:17:37 +0000 | [diff] [blame] | 712 | int rc; |
Hans Westgaard Ry | 78a50a5 | 2016-03-02 13:44:28 +0100 | [diff] [blame] | 713 | unsigned usable_sge = tx->max_send_sge - !!skb_headlen(skb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 714 | |
| 715 | if (unlikely(skb->len > tx->mtu)) { |
| 716 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", |
| 717 | skb->len, tx->mtu); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 718 | ++dev->stats.tx_dropped; |
| 719 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 77d8e1e | 2007-03-21 15:45:05 +0200 | [diff] [blame] | 720 | ipoib_cm_skb_too_long(dev, skb, tx->mtu - IPOIB_ENCAP_LEN); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 721 | return; |
| 722 | } |
Hans Westgaard Ry | 78a50a5 | 2016-03-02 13:44:28 +0100 | [diff] [blame] | 723 | if (skb_shinfo(skb)->nr_frags > usable_sge) { |
| 724 | if (skb_linearize(skb) < 0) { |
| 725 | ipoib_warn(priv, "skb could not be linearized\n"); |
| 726 | ++dev->stats.tx_dropped; |
| 727 | ++dev->stats.tx_errors; |
| 728 | dev_kfree_skb_any(skb); |
| 729 | return; |
| 730 | } |
| 731 | /* Does skb_linearize return ok without reducing nr_frags? */ |
| 732 | if (skb_shinfo(skb)->nr_frags > usable_sge) { |
| 733 | ipoib_warn(priv, "too many frags after skb linearize\n"); |
| 734 | ++dev->stats.tx_dropped; |
| 735 | ++dev->stats.tx_errors; |
| 736 | dev_kfree_skb_any(skb); |
| 737 | return; |
| 738 | } |
| 739 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 740 | ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", |
| 741 | tx->tx_head, skb->len, tx->qp->qp_num); |
| 742 | |
| 743 | /* |
| 744 | * We put the skb into the tx_ring _before_ we call post_send() |
| 745 | * because it's entirely possible that the completion handler will |
| 746 | * run before we execute anything after the post_send(). That |
| 747 | * means we have to make sure everything is properly recorded and |
| 748 | * our state is consistent before we call post_send(). |
| 749 | */ |
| 750 | tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; |
| 751 | tx_req->skb = skb; |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 752 | |
| 753 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 754 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 755 | dev_kfree_skb_any(skb); |
| 756 | return; |
| 757 | } |
| 758 | |
Shlomo Pongratz | 7e5a90c | 2013-02-04 15:29:10 +0000 | [diff] [blame] | 759 | skb_orphan(skb); |
| 760 | skb_dst_drop(skb); |
| 761 | |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 762 | rc = post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), tx_req); |
Or Gerlitz | a48f509 | 2010-03-04 13:17:37 +0000 | [diff] [blame] | 763 | if (unlikely(rc)) { |
| 764 | ipoib_warn(priv, "post_send failed, error %d\n", rc); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 765 | ++dev->stats.tx_errors; |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 766 | ipoib_dma_unmap_tx(priv, tx_req); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 767 | dev_kfree_skb_any(skb); |
| 768 | } else { |
Florian Westphal | 860e953 | 2016-05-03 16:33:13 +0200 | [diff] [blame] | 769 | netif_trans_update(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 770 | ++tx->tx_head; |
| 771 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 772 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 773 | ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", |
| 774 | tx->qp->qp_num); |
| 775 | netif_stop_queue(dev); |
Mike Marciniszyn | 1ee9e2a | 2013-02-26 15:46:27 +0000 | [diff] [blame] | 776 | rc = ib_req_notify_cq(priv->send_cq, |
| 777 | IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); |
| 778 | if (rc < 0) |
| 779 | ipoib_warn(priv, "request notify on send CQ failed\n"); |
| 780 | else if (rc) |
| 781 | ipoib_send_comp_handler(priv->send_cq, dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 782 | } |
| 783 | } |
| 784 | } |
| 785 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 786 | void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 787 | { |
| 788 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 789 | struct ipoib_cm_tx *tx = wc->qp->qp_context; |
| 790 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM; |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 791 | struct ipoib_tx_buf *tx_req; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 792 | unsigned long flags; |
| 793 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 794 | ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", |
| 795 | wr_id, wc->status); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 796 | |
| 797 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
| 798 | ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", |
| 799 | wr_id, ipoib_sendq_size); |
| 800 | return; |
| 801 | } |
| 802 | |
| 803 | tx_req = &tx->tx_ring[wr_id]; |
| 804 | |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 805 | ipoib_dma_unmap_tx(priv, tx_req); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 806 | |
| 807 | /* FIXME: is this right? Shouldn't we only increment on success? */ |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 808 | ++dev->stats.tx_packets; |
| 809 | dev->stats.tx_bytes += tx_req->skb->len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 810 | |
| 811 | dev_kfree_skb_any(tx_req->skb); |
| 812 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 813 | netif_tx_lock(dev); |
| 814 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 815 | ++tx->tx_tail; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 816 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
| 817 | netif_queue_stopped(dev) && |
| 818 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 819 | netif_wake_queue(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 820 | |
| 821 | if (wc->status != IB_WC_SUCCESS && |
| 822 | wc->status != IB_WC_WR_FLUSH_ERR) { |
| 823 | struct ipoib_neigh *neigh; |
| 824 | |
| 825 | ipoib_dbg(priv, "failed cm send event " |
| 826 | "(status=%d, wrid=%d vend_err %x)\n", |
| 827 | wc->status, wr_id, wc->vendor_err); |
| 828 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 829 | spin_lock_irqsave(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 830 | neigh = tx->neigh; |
| 831 | |
| 832 | if (neigh) { |
| 833 | neigh->cm = NULL; |
Shlomo Pongratz | b63b70d | 2012-07-24 17:05:22 +0000 | [diff] [blame] | 834 | ipoib_neigh_free(neigh); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 835 | |
| 836 | tx->neigh = NULL; |
| 837 | } |
| 838 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 839 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 840 | list_move(&tx->list, &priv->cm.reap_list); |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 841 | queue_work(priv->wq, &priv->cm.reap_task); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); |
| 845 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 846 | spin_unlock_irqrestore(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 847 | } |
| 848 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 849 | netif_tx_unlock(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 850 | } |
| 851 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 852 | int ipoib_cm_dev_open(struct net_device *dev) |
| 853 | { |
| 854 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 855 | int ret; |
| 856 | |
| 857 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) |
| 858 | return 0; |
| 859 | |
| 860 | priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); |
| 861 | if (IS_ERR(priv->cm.id)) { |
| 862 | printk(KERN_WARNING "%s: failed to create CM ID\n", priv->ca->name); |
Michael S. Tsirkin | 347fcfb | 2007-04-30 17:30:28 -0700 | [diff] [blame] | 863 | ret = PTR_ERR(priv->cm.id); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 864 | goto err_cm; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), |
Haggai Eran | 73fec7f | 2015-07-30 17:50:26 +0300 | [diff] [blame] | 868 | 0); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 869 | if (ret) { |
| 870 | printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, |
| 871 | IPOIB_CM_IETF_ID | priv->qp->qp_num); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 872 | goto err_listen; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 873 | } |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 874 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 875 | return 0; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 876 | |
| 877 | err_listen: |
| 878 | ib_destroy_cm_id(priv->cm.id); |
| 879 | err_cm: |
| 880 | priv->cm.id = NULL; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 881 | return ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 882 | } |
| 883 | |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 884 | static void ipoib_cm_free_rx_reap_list(struct net_device *dev) |
| 885 | { |
| 886 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 887 | struct ipoib_cm_rx *rx, *n; |
| 888 | LIST_HEAD(list); |
| 889 | |
| 890 | spin_lock_irq(&priv->lock); |
| 891 | list_splice_init(&priv->cm.rx_reap_list, &list); |
| 892 | spin_unlock_irq(&priv->lock); |
| 893 | |
| 894 | list_for_each_entry_safe(rx, n, &list, list) { |
| 895 | ib_destroy_cm_id(rx->id); |
| 896 | ib_destroy_qp(rx->qp); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 897 | if (!ipoib_cm_has_srq(dev)) { |
| 898 | ipoib_cm_free_rx_ring(priv->dev, rx->rx_ring); |
| 899 | spin_lock_irq(&priv->lock); |
| 900 | --priv->cm.nonsrq_conn_qp; |
| 901 | spin_unlock_irq(&priv->lock); |
| 902 | } |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 903 | kfree(rx); |
| 904 | } |
| 905 | } |
| 906 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 907 | void ipoib_cm_dev_stop(struct net_device *dev) |
| 908 | { |
| 909 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 910 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 911 | unsigned long begin; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 912 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 913 | |
Michael S. Tsirkin | 347fcfb | 2007-04-30 17:30:28 -0700 | [diff] [blame] | 914 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr) || !priv->cm.id) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 915 | return; |
| 916 | |
| 917 | ib_destroy_cm_id(priv->cm.id); |
Michael S. Tsirkin | 347fcfb | 2007-04-30 17:30:28 -0700 | [diff] [blame] | 918 | priv->cm.id = NULL; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 919 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 920 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 921 | while (!list_empty(&priv->cm.passive_ids)) { |
| 922 | p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 923 | list_move(&p->list, &priv->cm.rx_error_list); |
| 924 | p->state = IPOIB_CM_RX_ERROR; |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 925 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 926 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
| 927 | if (ret) |
| 928 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); |
| 929 | spin_lock_irq(&priv->lock); |
| 930 | } |
| 931 | |
| 932 | /* Wait for all RX to be drained */ |
| 933 | begin = jiffies; |
| 934 | |
| 935 | while (!list_empty(&priv->cm.rx_error_list) || |
| 936 | !list_empty(&priv->cm.rx_flush_list) || |
| 937 | !list_empty(&priv->cm.rx_drain_list)) { |
Michael S. Tsirkin | 8fd357a | 2007-05-24 14:02:39 -0700 | [diff] [blame] | 938 | if (time_after(jiffies, begin + 5 * HZ)) { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 939 | ipoib_warn(priv, "RX drain timing out\n"); |
| 940 | |
| 941 | /* |
| 942 | * assume the HW is wedged and just free up everything. |
| 943 | */ |
Pradeep Satyanarayana | ec229e5 | 2008-02-12 15:00:59 -0800 | [diff] [blame] | 944 | list_splice_init(&priv->cm.rx_flush_list, |
| 945 | &priv->cm.rx_reap_list); |
| 946 | list_splice_init(&priv->cm.rx_error_list, |
| 947 | &priv->cm.rx_reap_list); |
| 948 | list_splice_init(&priv->cm.rx_drain_list, |
| 949 | &priv->cm.rx_reap_list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 950 | break; |
| 951 | } |
| 952 | spin_unlock_irq(&priv->lock); |
| 953 | msleep(1); |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 954 | ipoib_drain_cq(dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 955 | spin_lock_irq(&priv->lock); |
| 956 | } |
| 957 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 958 | spin_unlock_irq(&priv->lock); |
| 959 | |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 960 | ipoib_cm_free_rx_reap_list(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 961 | |
| 962 | cancel_delayed_work(&priv->cm.stale_task); |
| 963 | } |
| 964 | |
| 965 | static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) |
| 966 | { |
| 967 | struct ipoib_cm_tx *p = cm_id->context; |
| 968 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 969 | struct ipoib_cm_data *data = event->private_data; |
| 970 | struct sk_buff_head skqueue; |
| 971 | struct ib_qp_attr qp_attr; |
| 972 | int qp_attr_mask, ret; |
| 973 | struct sk_buff *skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 974 | |
| 975 | p->mtu = be32_to_cpu(data->mtu); |
| 976 | |
Michael S. Tsirkin | 82c3aca | 2007-06-20 19:22:15 +0300 | [diff] [blame] | 977 | if (p->mtu <= IPOIB_ENCAP_LEN) { |
| 978 | ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n", |
| 979 | p->mtu, IPOIB_ENCAP_LEN); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 980 | return -EINVAL; |
| 981 | } |
| 982 | |
| 983 | qp_attr.qp_state = IB_QPS_RTR; |
| 984 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 985 | if (ret) { |
| 986 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); |
| 987 | return ret; |
| 988 | } |
| 989 | |
| 990 | qp_attr.rq_psn = 0 /* FIXME */; |
| 991 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); |
| 992 | if (ret) { |
| 993 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); |
| 994 | return ret; |
| 995 | } |
| 996 | |
| 997 | qp_attr.qp_state = IB_QPS_RTS; |
| 998 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 999 | if (ret) { |
| 1000 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); |
| 1001 | return ret; |
| 1002 | } |
| 1003 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); |
| 1004 | if (ret) { |
| 1005 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); |
| 1006 | return ret; |
| 1007 | } |
| 1008 | |
| 1009 | skb_queue_head_init(&skqueue); |
| 1010 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1011 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1012 | set_bit(IPOIB_FLAG_OPER_UP, &p->flags); |
| 1013 | if (p->neigh) |
| 1014 | while ((skb = __skb_dequeue(&p->neigh->queue))) |
| 1015 | __skb_queue_tail(&skqueue, skb); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1016 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1017 | |
| 1018 | while ((skb = __skb_dequeue(&skqueue))) { |
| 1019 | skb->dev = p->dev; |
| 1020 | if (dev_queue_xmit(skb)) |
| 1021 | ipoib_warn(priv, "dev_queue_xmit failed " |
| 1022 | "to requeue packet\n"); |
| 1023 | } |
| 1024 | |
| 1025 | ret = ib_send_cm_rtu(cm_id, NULL, 0); |
| 1026 | if (ret) { |
| 1027 | ipoib_warn(priv, "failed to send RTU: %d\n", ret); |
| 1028 | return ret; |
| 1029 | } |
| 1030 | return 0; |
| 1031 | } |
| 1032 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1033 | static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ipoib_cm_tx *tx) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1034 | { |
| 1035 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 1036 | struct ib_qp_init_attr attr = { |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 1037 | .send_cq = priv->recv_cq, |
| 1038 | .recv_cq = priv->recv_cq, |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 1039 | .srq = priv->cm.srq, |
| 1040 | .cap.max_send_wr = ipoib_sendq_size, |
| 1041 | .cap.max_send_sge = 1, |
| 1042 | .sq_sig_type = IB_SIGNAL_ALL_WR, |
| 1043 | .qp_type = IB_QPT_RC, |
Or Gerlitz | 09b9308 | 2014-05-11 15:15:11 +0300 | [diff] [blame] | 1044 | .qp_context = tx, |
| 1045 | .create_flags = IB_QP_CREATE_USE_GFP_NOIO |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1046 | }; |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 1047 | |
Or Gerlitz | 09b9308 | 2014-05-11 15:15:11 +0300 | [diff] [blame] | 1048 | struct ib_qp *tx_qp; |
| 1049 | |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 1050 | if (dev->features & NETIF_F_SG) |
Hans Westgaard Ry | 78a50a5 | 2016-03-02 13:44:28 +0100 | [diff] [blame] | 1051 | attr.cap.max_send_sge = |
| 1052 | min_t(u32, priv->ca->attrs.max_sge, MAX_SKB_FRAGS + 1); |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 1053 | |
Or Gerlitz | 09b9308 | 2014-05-11 15:15:11 +0300 | [diff] [blame] | 1054 | tx_qp = ib_create_qp(priv->pd, &attr); |
| 1055 | if (PTR_ERR(tx_qp) == -EINVAL) { |
| 1056 | ipoib_warn(priv, "can't use GFP_NOIO for QPs on device %s, using GFP_KERNEL\n", |
| 1057 | priv->ca->name); |
| 1058 | attr.create_flags &= ~IB_QP_CREATE_USE_GFP_NOIO; |
| 1059 | tx_qp = ib_create_qp(priv->pd, &attr); |
| 1060 | } |
Hans Westgaard Ry | 78a50a5 | 2016-03-02 13:44:28 +0100 | [diff] [blame] | 1061 | tx->max_send_sge = attr.cap.max_send_sge; |
Or Gerlitz | 09b9308 | 2014-05-11 15:15:11 +0300 | [diff] [blame] | 1062 | return tx_qp; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | static int ipoib_cm_send_req(struct net_device *dev, |
| 1066 | struct ib_cm_id *id, struct ib_qp *qp, |
| 1067 | u32 qpn, |
| 1068 | struct ib_sa_path_rec *pathrec) |
| 1069 | { |
| 1070 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1071 | struct ipoib_cm_data data = {}; |
| 1072 | struct ib_cm_req_param req = {}; |
| 1073 | |
| 1074 | data.qpn = cpu_to_be32(priv->qp->qp_num); |
| 1075 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); |
| 1076 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1077 | req.primary_path = pathrec; |
| 1078 | req.alternate_path = NULL; |
| 1079 | req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); |
| 1080 | req.qp_num = qp->qp_num; |
| 1081 | req.qp_type = qp->qp_type; |
| 1082 | req.private_data = &data; |
| 1083 | req.private_data_len = sizeof data; |
| 1084 | req.flow_control = 0; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1085 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1086 | req.starting_psn = 0; /* FIXME */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1087 | |
| 1088 | /* |
| 1089 | * Pick some arbitrary defaults here; we could make these |
| 1090 | * module parameters if anyone cared about setting them. |
| 1091 | */ |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1092 | req.responder_resources = 4; |
| 1093 | req.remote_cm_response_timeout = 20; |
| 1094 | req.local_cm_response_timeout = 20; |
| 1095 | req.retry_count = 0; /* RFC draft warns against retries */ |
| 1096 | req.rnr_retry_count = 0; /* RFC draft warns against retries */ |
| 1097 | req.max_cm_retries = 15; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1098 | req.srq = ipoib_cm_has_srq(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1099 | return ib_send_cm_req(id, &req); |
| 1100 | } |
| 1101 | |
| 1102 | static int ipoib_cm_modify_tx_init(struct net_device *dev, |
| 1103 | struct ib_cm_id *cm_id, struct ib_qp *qp) |
| 1104 | { |
| 1105 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1106 | struct ib_qp_attr qp_attr; |
| 1107 | int qp_attr_mask, ret; |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 1108 | ret = ib_find_pkey(priv->ca, priv->port, priv->pkey, &qp_attr.pkey_index); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1109 | if (ret) { |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 1110 | ipoib_warn(priv, "pkey 0x%x not found: %d\n", priv->pkey, ret); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1111 | return ret; |
| 1112 | } |
| 1113 | |
| 1114 | qp_attr.qp_state = IB_QPS_INIT; |
| 1115 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; |
| 1116 | qp_attr.port_num = priv->port; |
| 1117 | qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; |
| 1118 | |
| 1119 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 1120 | if (ret) { |
| 1121 | ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); |
| 1122 | return ret; |
| 1123 | } |
| 1124 | return 0; |
| 1125 | } |
| 1126 | |
| 1127 | static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, |
| 1128 | struct ib_sa_path_rec *pathrec) |
| 1129 | { |
| 1130 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 1131 | int ret; |
| 1132 | |
Or Gerlitz | 09b9308 | 2014-05-11 15:15:11 +0300 | [diff] [blame] | 1133 | p->tx_ring = __vmalloc(ipoib_sendq_size * sizeof *p->tx_ring, |
| 1134 | GFP_NOIO, PAGE_KERNEL); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1135 | if (!p->tx_ring) { |
| 1136 | ipoib_warn(priv, "failed to allocate tx ring\n"); |
| 1137 | ret = -ENOMEM; |
| 1138 | goto err_tx; |
| 1139 | } |
Or Gerlitz | 09b9308 | 2014-05-11 15:15:11 +0300 | [diff] [blame] | 1140 | memset(p->tx_ring, 0, ipoib_sendq_size * sizeof *p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1141 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1142 | p->qp = ipoib_cm_create_tx_qp(p->dev, p); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1143 | if (IS_ERR(p->qp)) { |
| 1144 | ret = PTR_ERR(p->qp); |
| 1145 | ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); |
| 1146 | goto err_qp; |
| 1147 | } |
| 1148 | |
| 1149 | p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); |
| 1150 | if (IS_ERR(p->id)) { |
| 1151 | ret = PTR_ERR(p->id); |
| 1152 | ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); |
| 1153 | goto err_id; |
| 1154 | } |
| 1155 | |
| 1156 | ret = ipoib_cm_modify_tx_init(p->dev, p->id, p->qp); |
| 1157 | if (ret) { |
| 1158 | ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); |
| 1159 | goto err_modify; |
| 1160 | } |
| 1161 | |
| 1162 | ret = ipoib_cm_send_req(p->dev, p->id, p->qp, qpn, pathrec); |
| 1163 | if (ret) { |
| 1164 | ipoib_warn(priv, "failed to send cm req: %d\n", ret); |
| 1165 | goto err_send_cm; |
| 1166 | } |
| 1167 | |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 1168 | ipoib_dbg(priv, "Request connection 0x%x for gid %pI6 qpn 0x%x\n", |
Harvey Harrison | fcace2f | 2008-10-28 22:37:22 -0700 | [diff] [blame] | 1169 | p->qp->qp_num, pathrec->dgid.raw, qpn); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1170 | |
| 1171 | return 0; |
| 1172 | |
| 1173 | err_send_cm: |
| 1174 | err_modify: |
| 1175 | ib_destroy_cm_id(p->id); |
| 1176 | err_id: |
| 1177 | p->id = NULL; |
| 1178 | ib_destroy_qp(p->qp); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1179 | err_qp: |
| 1180 | p->qp = NULL; |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1181 | vfree(p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1182 | err_tx: |
| 1183 | return ret; |
| 1184 | } |
| 1185 | |
| 1186 | static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) |
| 1187 | { |
| 1188 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 1189 | struct ipoib_tx_buf *tx_req; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1190 | unsigned long begin; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1191 | |
| 1192 | ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", |
| 1193 | p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); |
| 1194 | |
| 1195 | if (p->id) |
| 1196 | ib_destroy_cm_id(p->id); |
| 1197 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1198 | if (p->tx_ring) { |
| 1199 | /* Wait for all sends to complete */ |
| 1200 | begin = jiffies; |
| 1201 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
| 1202 | if (time_after(jiffies, begin + 5 * HZ)) { |
| 1203 | ipoib_warn(priv, "timing out; %d sends not completed\n", |
| 1204 | p->tx_head - p->tx_tail); |
| 1205 | goto timeout; |
| 1206 | } |
| 1207 | |
| 1208 | msleep(1); |
| 1209 | } |
| 1210 | } |
| 1211 | |
| 1212 | timeout: |
| 1213 | |
| 1214 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
| 1215 | tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; |
Yuval Shaia | c426877 | 2015-07-12 01:24:09 -0700 | [diff] [blame] | 1216 | ipoib_dma_unmap_tx(priv, tx_req); |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1217 | dev_kfree_skb_any(tx_req->skb); |
| 1218 | ++p->tx_tail; |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1219 | netif_tx_lock_bh(p->dev); |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1220 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
| 1221 | netif_queue_stopped(p->dev) && |
| 1222 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
| 1223 | netif_wake_queue(p->dev); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1224 | netif_tx_unlock_bh(p->dev); |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1225 | } |
| 1226 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1227 | if (p->qp) |
| 1228 | ib_destroy_qp(p->qp); |
| 1229 | |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1230 | vfree(p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1231 | kfree(p); |
| 1232 | } |
| 1233 | |
| 1234 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
| 1235 | struct ib_cm_event *event) |
| 1236 | { |
| 1237 | struct ipoib_cm_tx *tx = cm_id->context; |
| 1238 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); |
| 1239 | struct net_device *dev = priv->dev; |
| 1240 | struct ipoib_neigh *neigh; |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1241 | unsigned long flags; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1242 | int ret; |
| 1243 | |
| 1244 | switch (event->event) { |
| 1245 | case IB_CM_DREQ_RECEIVED: |
| 1246 | ipoib_dbg(priv, "DREQ received.\n"); |
| 1247 | ib_send_cm_drep(cm_id, NULL, 0); |
| 1248 | break; |
| 1249 | case IB_CM_REP_RECEIVED: |
| 1250 | ipoib_dbg(priv, "REP received.\n"); |
| 1251 | ret = ipoib_cm_rep_handler(cm_id, event); |
| 1252 | if (ret) |
| 1253 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 1254 | NULL, 0, NULL, 0); |
| 1255 | break; |
| 1256 | case IB_CM_REQ_ERROR: |
| 1257 | case IB_CM_REJ_RECEIVED: |
| 1258 | case IB_CM_TIMEWAIT_EXIT: |
| 1259 | ipoib_dbg(priv, "CM error %d.\n", event->event); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1260 | netif_tx_lock_bh(dev); |
| 1261 | spin_lock_irqsave(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1262 | neigh = tx->neigh; |
| 1263 | |
| 1264 | if (neigh) { |
| 1265 | neigh->cm = NULL; |
Shlomo Pongratz | b63b70d | 2012-07-24 17:05:22 +0000 | [diff] [blame] | 1266 | ipoib_neigh_free(neigh); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1267 | |
| 1268 | tx->neigh = NULL; |
| 1269 | } |
| 1270 | |
| 1271 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 1272 | list_move(&tx->list, &priv->cm.reap_list); |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 1273 | queue_work(priv->wq, &priv->cm.reap_task); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1274 | } |
| 1275 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1276 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1277 | netif_tx_unlock_bh(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1278 | break; |
| 1279 | default: |
| 1280 | break; |
| 1281 | } |
| 1282 | |
| 1283 | return 0; |
| 1284 | } |
| 1285 | |
| 1286 | struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path, |
| 1287 | struct ipoib_neigh *neigh) |
| 1288 | { |
| 1289 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1290 | struct ipoib_cm_tx *tx; |
| 1291 | |
| 1292 | tx = kzalloc(sizeof *tx, GFP_ATOMIC); |
| 1293 | if (!tx) |
| 1294 | return NULL; |
| 1295 | |
| 1296 | neigh->cm = tx; |
| 1297 | tx->neigh = neigh; |
| 1298 | tx->path = path; |
| 1299 | tx->dev = dev; |
| 1300 | list_add(&tx->list, &priv->cm.start_list); |
| 1301 | set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 1302 | queue_work(priv->wq, &priv->cm.start_task); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1303 | return tx; |
| 1304 | } |
| 1305 | |
| 1306 | void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) |
| 1307 | { |
| 1308 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); |
Shlomo Pongratz | fa16ebe | 2012-08-13 14:39:49 +0000 | [diff] [blame] | 1309 | unsigned long flags; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1310 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
Shlomo Pongratz | fa16ebe | 2012-08-13 14:39:49 +0000 | [diff] [blame] | 1311 | spin_lock_irqsave(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1312 | list_move(&tx->list, &priv->cm.reap_list); |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 1313 | queue_work(priv->wq, &priv->cm.reap_task); |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 1314 | ipoib_dbg(priv, "Reap connection for gid %pI6\n", |
Shlomo Pongratz | b63b70d | 2012-07-24 17:05:22 +0000 | [diff] [blame] | 1315 | tx->neigh->daddr + 4); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1316 | tx->neigh = NULL; |
Shlomo Pongratz | fa16ebe | 2012-08-13 14:39:49 +0000 | [diff] [blame] | 1317 | spin_unlock_irqrestore(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1318 | } |
| 1319 | } |
| 1320 | |
| 1321 | static void ipoib_cm_tx_start(struct work_struct *work) |
| 1322 | { |
| 1323 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1324 | cm.start_task); |
| 1325 | struct net_device *dev = priv->dev; |
| 1326 | struct ipoib_neigh *neigh; |
| 1327 | struct ipoib_cm_tx *p; |
| 1328 | unsigned long flags; |
| 1329 | int ret; |
| 1330 | |
| 1331 | struct ib_sa_path_rec pathrec; |
| 1332 | u32 qpn; |
| 1333 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1334 | netif_tx_lock_bh(dev); |
| 1335 | spin_lock_irqsave(&priv->lock, flags); |
| 1336 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1337 | while (!list_empty(&priv->cm.start_list)) { |
| 1338 | p = list_entry(priv->cm.start_list.next, typeof(*p), list); |
| 1339 | list_del_init(&p->list); |
| 1340 | neigh = p->neigh; |
Shlomo Pongratz | b63b70d | 2012-07-24 17:05:22 +0000 | [diff] [blame] | 1341 | qpn = IPOIB_QPN(neigh->daddr); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1342 | memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1343 | |
| 1344 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1345 | netif_tx_unlock_bh(dev); |
| 1346 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1347 | ret = ipoib_cm_tx_init(p, qpn, &pathrec); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1348 | |
| 1349 | netif_tx_lock_bh(dev); |
| 1350 | spin_lock_irqsave(&priv->lock, flags); |
| 1351 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1352 | if (ret) { |
| 1353 | neigh = p->neigh; |
| 1354 | if (neigh) { |
| 1355 | neigh->cm = NULL; |
Shlomo Pongratz | b63b70d | 2012-07-24 17:05:22 +0000 | [diff] [blame] | 1356 | ipoib_neigh_free(neigh); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1357 | } |
| 1358 | list_del(&p->list); |
| 1359 | kfree(p); |
| 1360 | } |
| 1361 | } |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1362 | |
| 1363 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1364 | netif_tx_unlock_bh(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1365 | } |
| 1366 | |
| 1367 | static void ipoib_cm_tx_reap(struct work_struct *work) |
| 1368 | { |
| 1369 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1370 | cm.reap_task); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1371 | struct net_device *dev = priv->dev; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1372 | struct ipoib_cm_tx *p; |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1373 | unsigned long flags; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1374 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1375 | netif_tx_lock_bh(dev); |
| 1376 | spin_lock_irqsave(&priv->lock, flags); |
| 1377 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1378 | while (!list_empty(&priv->cm.reap_list)) { |
| 1379 | p = list_entry(priv->cm.reap_list.next, typeof(*p), list); |
| 1380 | list_del(&p->list); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1381 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1382 | netif_tx_unlock_bh(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1383 | ipoib_cm_tx_destroy(p); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1384 | netif_tx_lock_bh(dev); |
| 1385 | spin_lock_irqsave(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1386 | } |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1387 | |
| 1388 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1389 | netif_tx_unlock_bh(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1390 | } |
| 1391 | |
| 1392 | static void ipoib_cm_skb_reap(struct work_struct *work) |
| 1393 | { |
| 1394 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1395 | cm.skb_task); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1396 | struct net_device *dev = priv->dev; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1397 | struct sk_buff *skb; |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1398 | unsigned long flags; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1399 | unsigned mtu = priv->mcast_mtu; |
| 1400 | |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1401 | netif_tx_lock_bh(dev); |
| 1402 | spin_lock_irqsave(&priv->lock, flags); |
| 1403 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1404 | while ((skb = skb_dequeue(&priv->cm.skb_queue))) { |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1405 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1406 | netif_tx_unlock_bh(dev); |
| 1407 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1408 | if (skb->protocol == htons(ETH_P_IP)) |
| 1409 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); |
Roland Dreier | d90f9b3 | 2012-07-05 22:39:34 -0700 | [diff] [blame] | 1410 | #if IS_ENABLED(CONFIG_IPV6) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1411 | else if (skb->protocol == htons(ETH_P_IPV6)) |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1412 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1413 | #endif |
| 1414 | dev_kfree_skb_any(skb); |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1415 | |
| 1416 | netif_tx_lock_bh(dev); |
| 1417 | spin_lock_irqsave(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1418 | } |
Roland Dreier | 943c246 | 2008-09-30 10:36:21 -0700 | [diff] [blame] | 1419 | |
| 1420 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1421 | netif_tx_unlock_bh(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1422 | } |
| 1423 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1424 | void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1425 | unsigned int mtu) |
| 1426 | { |
| 1427 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1428 | int e = skb_queue_empty(&priv->cm.skb_queue); |
| 1429 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1430 | if (skb_dst(skb)) |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 1431 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1432 | |
| 1433 | skb_queue_tail(&priv->cm.skb_queue, skb); |
| 1434 | if (e) |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 1435 | queue_work(priv->wq, &priv->cm.skb_task); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1436 | } |
| 1437 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1438 | static void ipoib_cm_rx_reap(struct work_struct *work) |
| 1439 | { |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1440 | ipoib_cm_free_rx_reap_list(container_of(work, struct ipoib_dev_priv, |
| 1441 | cm.rx_reap_task)->dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1442 | } |
| 1443 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1444 | static void ipoib_cm_stale_task(struct work_struct *work) |
| 1445 | { |
| 1446 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1447 | cm.stale_task.work); |
| 1448 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1449 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1450 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1451 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1452 | while (!list_empty(&priv->cm.passive_ids)) { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1453 | /* List is sorted by LRU, start from tail, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1454 | * stop when we see a recently used entry */ |
| 1455 | p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); |
Michael S. Tsirkin | 60a596d | 2007-03-22 14:32:09 -0700 | [diff] [blame] | 1456 | if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1457 | break; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1458 | list_move(&p->list, &priv->cm.rx_error_list); |
| 1459 | p->state = IPOIB_CM_RX_ERROR; |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1460 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1461 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
| 1462 | if (ret) |
| 1463 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1464 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1465 | } |
Michael S. Tsirkin | 7c5b9ef | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 1466 | |
| 1467 | if (!list_empty(&priv->cm.passive_ids)) |
Doug Ledford | 0b39578 | 2015-02-21 19:27:03 -0500 | [diff] [blame] | 1468 | queue_delayed_work(priv->wq, |
Michael S. Tsirkin | 7c5b9ef | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 1469 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1470 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1471 | } |
| 1472 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1473 | static ssize_t show_mode(struct device *d, struct device_attribute *attr, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1474 | char *buf) |
| 1475 | { |
| 1476 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(d)); |
| 1477 | |
| 1478 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) |
| 1479 | return sprintf(buf, "connected\n"); |
| 1480 | else |
| 1481 | return sprintf(buf, "datagram\n"); |
| 1482 | } |
| 1483 | |
Or Gerlitz | 862096a | 2012-09-27 12:06:02 +0000 | [diff] [blame] | 1484 | static ssize_t set_mode(struct device *d, struct device_attribute *attr, |
| 1485 | const char *buf, size_t count) |
| 1486 | { |
| 1487 | struct net_device *dev = to_net_dev(d); |
| 1488 | int ret; |
Erez Shitrit | 198b12f | 2016-06-04 15:15:20 +0300 | [diff] [blame] | 1489 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1490 | |
| 1491 | if (test_bit(IPOIB_FLAG_GOING_DOWN, &priv->flags)) |
| 1492 | return -EPERM; |
Or Gerlitz | 862096a | 2012-09-27 12:06:02 +0000 | [diff] [blame] | 1493 | |
| 1494 | if (!rtnl_trylock()) |
| 1495 | return restart_syscall(); |
| 1496 | |
| 1497 | ret = ipoib_set_mode(dev, buf); |
| 1498 | |
| 1499 | rtnl_unlock(); |
| 1500 | |
| 1501 | if (!ret) |
| 1502 | return count; |
| 1503 | |
| 1504 | return ret; |
| 1505 | } |
| 1506 | |
Roland Dreier | 551fd61 | 2007-02-16 13:57:33 -0800 | [diff] [blame] | 1507 | static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, show_mode, set_mode); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1508 | |
| 1509 | int ipoib_cm_add_mode_attr(struct net_device *dev) |
| 1510 | { |
| 1511 | return device_create_file(&dev->dev, &dev_attr_mode); |
| 1512 | } |
| 1513 | |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1514 | static void ipoib_cm_create_srq(struct net_device *dev, int max_sge) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1515 | { |
| 1516 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1517 | struct ib_srq_init_attr srq_init_attr = { |
Sean Hefty | 96104ed | 2011-05-23 16:31:36 -0700 | [diff] [blame] | 1518 | .srq_type = IB_SRQT_BASIC, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1519 | .attr = { |
| 1520 | .max_wr = ipoib_recvq_size, |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1521 | .max_sge = max_sge |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1522 | } |
| 1523 | }; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1524 | |
| 1525 | priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); |
| 1526 | if (IS_ERR(priv->cm.srq)) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1527 | if (PTR_ERR(priv->cm.srq) != -ENOSYS) |
| 1528 | printk(KERN_WARNING "%s: failed to allocate SRQ, error %ld\n", |
| 1529 | priv->ca->name, PTR_ERR(priv->cm.srq)); |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1530 | priv->cm.srq = NULL; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1531 | return; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1532 | } |
| 1533 | |
Joe Perches | 948579c | 2010-11-05 03:07:36 +0000 | [diff] [blame] | 1534 | priv->cm.srq_ring = vzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring); |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1535 | if (!priv->cm.srq_ring) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1536 | printk(KERN_WARNING "%s: failed to allocate CM SRQ ring (%d entries)\n", |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1537 | priv->ca->name, ipoib_recvq_size); |
| 1538 | ib_destroy_srq(priv->cm.srq); |
| 1539 | priv->cm.srq = NULL; |
David J. Wilder | b140406 | 2008-08-08 15:51:29 -0700 | [diff] [blame] | 1540 | return; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1541 | } |
David J. Wilder | b140406 | 2008-08-08 15:51:29 -0700 | [diff] [blame] | 1542 | |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1543 | } |
| 1544 | |
| 1545 | int ipoib_cm_dev_init(struct net_device *dev) |
| 1546 | { |
| 1547 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Or Gerlitz | 4a061b2 | 2015-12-18 10:59:46 +0200 | [diff] [blame] | 1548 | int max_srq_sge, i; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1549 | |
| 1550 | INIT_LIST_HEAD(&priv->cm.passive_ids); |
| 1551 | INIT_LIST_HEAD(&priv->cm.reap_list); |
| 1552 | INIT_LIST_HEAD(&priv->cm.start_list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1553 | INIT_LIST_HEAD(&priv->cm.rx_error_list); |
| 1554 | INIT_LIST_HEAD(&priv->cm.rx_flush_list); |
| 1555 | INIT_LIST_HEAD(&priv->cm.rx_drain_list); |
| 1556 | INIT_LIST_HEAD(&priv->cm.rx_reap_list); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1557 | INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); |
| 1558 | INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); |
| 1559 | INIT_WORK(&priv->cm.skb_task, ipoib_cm_skb_reap); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1560 | INIT_WORK(&priv->cm.rx_reap_task, ipoib_cm_rx_reap); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1561 | INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); |
| 1562 | |
| 1563 | skb_queue_head_init(&priv->cm.skb_queue); |
| 1564 | |
Or Gerlitz | 4a061b2 | 2015-12-18 10:59:46 +0200 | [diff] [blame] | 1565 | ipoib_dbg(priv, "max_srq_sge=%d\n", priv->ca->attrs.max_srq_sge); |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1566 | |
Or Gerlitz | 4a061b2 | 2015-12-18 10:59:46 +0200 | [diff] [blame] | 1567 | max_srq_sge = min_t(int, IPOIB_CM_RX_SG, priv->ca->attrs.max_srq_sge); |
| 1568 | ipoib_cm_create_srq(dev, max_srq_sge); |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1569 | if (ipoib_cm_has_srq(dev)) { |
Or Gerlitz | 4a061b2 | 2015-12-18 10:59:46 +0200 | [diff] [blame] | 1570 | priv->cm.max_cm_mtu = max_srq_sge * PAGE_SIZE - 0x10; |
| 1571 | priv->cm.num_frags = max_srq_sge; |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1572 | ipoib_dbg(priv, "max_cm_mtu = 0x%x, num_frags=%d\n", |
| 1573 | priv->cm.max_cm_mtu, priv->cm.num_frags); |
| 1574 | } else { |
| 1575 | priv->cm.max_cm_mtu = IPOIB_CM_MTU; |
| 1576 | priv->cm.num_frags = IPOIB_CM_RX_SG; |
| 1577 | } |
| 1578 | |
Roland Dreier | a7d834c | 2008-07-14 23:48:47 -0700 | [diff] [blame] | 1579 | ipoib_cm_init_rx_wr(dev, &priv->cm.rx_wr, priv->cm.rx_sge); |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1580 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1581 | if (ipoib_cm_has_srq(dev)) { |
| 1582 | for (i = 0; i < ipoib_recvq_size; ++i) { |
| 1583 | if (!ipoib_cm_alloc_rx_skb(dev, priv->cm.srq_ring, i, |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1584 | priv->cm.num_frags - 1, |
Tal Alon | 22252b4 | 2013-10-16 17:37:48 +0300 | [diff] [blame] | 1585 | priv->cm.srq_ring[i].mapping, |
| 1586 | GFP_KERNEL)) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1587 | ipoib_warn(priv, "failed to allocate " |
| 1588 | "receive buffer %d\n", i); |
| 1589 | ipoib_cm_dev_cleanup(dev); |
| 1590 | return -ENOMEM; |
| 1591 | } |
| 1592 | |
| 1593 | if (ipoib_cm_post_receive_srq(dev, i)) { |
| 1594 | ipoib_warn(priv, "ipoib_cm_post_receive_srq " |
| 1595 | "failed for buf %d\n", i); |
| 1596 | ipoib_cm_dev_cleanup(dev); |
| 1597 | return -EIO; |
| 1598 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1599 | } |
| 1600 | } |
| 1601 | |
| 1602 | priv->dev->dev_addr[0] = IPOIB_FLAGS_RC; |
| 1603 | return 0; |
| 1604 | } |
| 1605 | |
| 1606 | void ipoib_cm_dev_cleanup(struct net_device *dev) |
| 1607 | { |
| 1608 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1609 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1610 | |
| 1611 | if (!priv->cm.srq) |
| 1612 | return; |
| 1613 | |
| 1614 | ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); |
| 1615 | |
| 1616 | ret = ib_destroy_srq(priv->cm.srq); |
| 1617 | if (ret) |
| 1618 | ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); |
| 1619 | |
| 1620 | priv->cm.srq = NULL; |
| 1621 | if (!priv->cm.srq_ring) |
| 1622 | return; |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1623 | |
| 1624 | ipoib_cm_free_rx_ring(dev, priv->cm.srq_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1625 | priv->cm.srq_ring = NULL; |
| 1626 | } |