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. |
| 31 | * |
| 32 | * $Id$ |
| 33 | */ |
| 34 | |
| 35 | #include <rdma/ib_cm.h> |
| 36 | #include <rdma/ib_cache.h> |
| 37 | #include <net/dst.h> |
| 38 | #include <net/icmp.h> |
| 39 | #include <linux/icmpv6.h> |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 40 | #include <linux/delay.h> |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 41 | #include <linux/vmalloc.h> |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 42 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 43 | #include "ipoib.h" |
| 44 | |
| 45 | int ipoib_max_conn_qp = 128; |
| 46 | |
| 47 | module_param_named(max_nonsrq_conn_qp, ipoib_max_conn_qp, int, 0444); |
| 48 | MODULE_PARM_DESC(max_nonsrq_conn_qp, |
| 49 | "Max number of connected-mode QPs per interface " |
| 50 | "(applied only if shared receive queue is not available)"); |
| 51 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 52 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA |
| 53 | static int data_debug_level; |
| 54 | |
| 55 | module_param_named(cm_data_debug_level, data_debug_level, int, 0644); |
| 56 | MODULE_PARM_DESC(cm_data_debug_level, |
| 57 | "Enable data path debug tracing for connected mode if > 0"); |
| 58 | #endif |
| 59 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 60 | #define IPOIB_CM_IETF_ID 0x1000000000000000ULL |
| 61 | |
| 62 | #define IPOIB_CM_RX_UPDATE_TIME (256 * HZ) |
| 63 | #define IPOIB_CM_RX_TIMEOUT (2 * 256 * HZ) |
| 64 | #define IPOIB_CM_RX_DELAY (3 * 256 * HZ) |
| 65 | #define IPOIB_CM_RX_UPDATE_MASK (0x3) |
| 66 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 67 | static struct ib_qp_attr ipoib_cm_err_attr = { |
| 68 | .qp_state = IB_QPS_ERR |
| 69 | }; |
| 70 | |
Roland Dreier | 09f60f8 | 2007-10-26 13:44:25 -0700 | [diff] [blame] | 71 | #define IPOIB_CM_RX_DRAIN_WRID 0xffffffff |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 72 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 73 | static struct ib_send_wr ipoib_cm_rx_drain_wr = { |
| 74 | .wr_id = IPOIB_CM_RX_DRAIN_WRID, |
| 75 | .opcode = IB_WR_SEND, |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 76 | }; |
| 77 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 78 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
| 79 | struct ib_cm_event *event); |
| 80 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 81 | 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] | 82 | u64 mapping[IPOIB_CM_RX_SG]) |
| 83 | { |
| 84 | int i; |
| 85 | |
| 86 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); |
| 87 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 88 | for (i = 0; i < frags; ++i) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 89 | ib_dma_unmap_single(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); |
| 90 | } |
| 91 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 92 | 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] | 93 | { |
| 94 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 95 | struct ib_recv_wr *bad_wr; |
| 96 | int i, ret; |
| 97 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 98 | 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] | 99 | |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 100 | for (i = 0; i < priv->cm.num_frags; ++i) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 101 | priv->cm.rx_sge[i].addr = priv->cm.srq_ring[id].mapping[i]; |
| 102 | |
| 103 | ret = ib_post_srq_recv(priv->cm.srq, &priv->cm.rx_wr, &bad_wr); |
| 104 | if (unlikely(ret)) { |
| 105 | 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] | 106 | ipoib_cm_dma_unmap_rx(priv, priv->cm.num_frags - 1, |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 107 | priv->cm.srq_ring[id].mapping); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 108 | dev_kfree_skb_any(priv->cm.srq_ring[id].skb); |
| 109 | priv->cm.srq_ring[id].skb = NULL; |
| 110 | } |
| 111 | |
| 112 | return ret; |
| 113 | } |
| 114 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 115 | static int ipoib_cm_post_receive_nonsrq(struct net_device *dev, |
| 116 | struct ipoib_cm_rx *rx, int id) |
| 117 | { |
| 118 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 119 | struct ib_recv_wr *bad_wr; |
| 120 | int i, ret; |
| 121 | |
| 122 | priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
| 123 | |
| 124 | for (i = 0; i < IPOIB_CM_RX_SG; ++i) |
| 125 | priv->cm.rx_sge[i].addr = rx->rx_ring[id].mapping[i]; |
| 126 | |
| 127 | ret = ib_post_recv(rx->qp, &priv->cm.rx_wr, &bad_wr); |
| 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, |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 142 | u64 mapping[IPOIB_CM_RX_SG]) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 143 | { |
| 144 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 145 | struct sk_buff *skb; |
| 146 | int i; |
| 147 | |
| 148 | skb = dev_alloc_skb(IPOIB_CM_HEAD_SIZE + 12); |
| 149 | if (unlikely(!skb)) |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 150 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 151 | |
| 152 | /* |
| 153 | * IPoIB adds a 4 byte header. So we need 12 more bytes to align the |
| 154 | * IP header to a multiple of 16. |
| 155 | */ |
| 156 | skb_reserve(skb, 12); |
| 157 | |
| 158 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, IPOIB_CM_HEAD_SIZE, |
| 159 | DMA_FROM_DEVICE); |
| 160 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) { |
| 161 | dev_kfree_skb_any(skb); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 162 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 163 | } |
| 164 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 165 | for (i = 0; i < frags; i++) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 166 | struct page *page = alloc_page(GFP_ATOMIC); |
| 167 | |
| 168 | if (!page) |
| 169 | goto partial_error; |
| 170 | skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE); |
| 171 | |
| 172 | mapping[i + 1] = ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[i].page, |
Michael S. Tsirkin | 6371ea3 | 2007-04-10 18:32:42 +0300 | [diff] [blame] | 173 | 0, PAGE_SIZE, DMA_FROM_DEVICE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 174 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[i + 1]))) |
| 175 | goto partial_error; |
| 176 | } |
| 177 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 178 | rx_ring[id].skb = skb; |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 179 | return skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 180 | |
| 181 | partial_error: |
| 182 | |
| 183 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); |
| 184 | |
Ralph Campbell | 841adfc | 2007-06-29 11:37:56 -0700 | [diff] [blame] | 185 | for (; i > 0; --i) |
| 186 | ib_dma_unmap_single(priv->ca, mapping[i], PAGE_SIZE, DMA_FROM_DEVICE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 187 | |
Michael S. Tsirkin | 8a2e65f | 2007-02-16 00:16:13 +0200 | [diff] [blame] | 188 | dev_kfree_skb_any(skb); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 189 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 190 | } |
| 191 | |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 192 | static void ipoib_cm_free_rx_ring(struct net_device *dev, |
| 193 | struct ipoib_cm_rx_buf *rx_ring) |
| 194 | { |
| 195 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 196 | int i; |
| 197 | |
| 198 | for (i = 0; i < ipoib_recvq_size; ++i) |
| 199 | if (rx_ring[i].skb) { |
| 200 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, |
| 201 | rx_ring[i].mapping); |
| 202 | dev_kfree_skb_any(rx_ring[i].skb); |
| 203 | } |
| 204 | |
| 205 | kfree(rx_ring); |
| 206 | } |
| 207 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 208 | 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] | 209 | { |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 210 | struct ib_send_wr *bad_wr; |
| 211 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 212 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 213 | /* 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] | 214 | * make sure we have at most 1 outstanding WR. */ |
| 215 | if (list_empty(&priv->cm.rx_flush_list) || |
| 216 | !list_empty(&priv->cm.rx_drain_list)) |
| 217 | return; |
| 218 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 219 | /* |
| 220 | * QPs on flush list are error state. This way, a "flush |
| 221 | * error" WC will be immediately generated for each WR we post. |
| 222 | */ |
| 223 | p = list_entry(priv->cm.rx_flush_list.next, typeof(*p), list); |
| 224 | if (ib_post_send(p->qp, &ipoib_cm_rx_drain_wr, &bad_wr)) |
| 225 | ipoib_warn(priv, "failed to post drain wr\n"); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 226 | |
| 227 | list_splice_init(&priv->cm.rx_flush_list, &priv->cm.rx_drain_list); |
| 228 | } |
| 229 | |
| 230 | static void ipoib_cm_rx_event_handler(struct ib_event *event, void *ctx) |
| 231 | { |
| 232 | struct ipoib_cm_rx *p = ctx; |
| 233 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 234 | unsigned long flags; |
| 235 | |
| 236 | if (event->event != IB_EVENT_QP_LAST_WQE_REACHED) |
| 237 | return; |
| 238 | |
| 239 | spin_lock_irqsave(&priv->lock, flags); |
| 240 | list_move(&p->list, &priv->cm.rx_flush_list); |
| 241 | p->state = IPOIB_CM_RX_FLUSH; |
| 242 | ipoib_cm_start_rx_drain(priv); |
| 243 | spin_unlock_irqrestore(&priv->lock, flags); |
| 244 | } |
| 245 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 246 | static struct ib_qp *ipoib_cm_create_rx_qp(struct net_device *dev, |
| 247 | struct ipoib_cm_rx *p) |
| 248 | { |
| 249 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 250 | struct ib_qp_init_attr attr = { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 251 | .event_handler = ipoib_cm_rx_event_handler, |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 252 | .send_cq = priv->recv_cq, /* For drain WR */ |
| 253 | .recv_cq = priv->recv_cq, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 254 | .srq = priv->cm.srq, |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 255 | .cap.max_send_wr = 1, /* For drain WR */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 256 | .cap.max_send_sge = 1, /* FIXME: 0 Seems not to work */ |
| 257 | .sq_sig_type = IB_SIGNAL_ALL_WR, |
| 258 | .qp_type = IB_QPT_RC, |
| 259 | .qp_context = p, |
| 260 | }; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 261 | |
| 262 | if (!ipoib_cm_has_srq(dev)) { |
| 263 | attr.cap.max_recv_wr = ipoib_recvq_size; |
| 264 | attr.cap.max_recv_sge = IPOIB_CM_RX_SG; |
| 265 | } |
| 266 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 267 | return ib_create_qp(priv->pd, &attr); |
| 268 | } |
| 269 | |
| 270 | static int ipoib_cm_modify_rx_qp(struct net_device *dev, |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 271 | struct ib_cm_id *cm_id, struct ib_qp *qp, |
| 272 | unsigned psn) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 273 | { |
| 274 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 275 | struct ib_qp_attr qp_attr; |
| 276 | int qp_attr_mask, ret; |
| 277 | |
| 278 | qp_attr.qp_state = IB_QPS_INIT; |
| 279 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 280 | if (ret) { |
| 281 | ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); |
| 282 | return ret; |
| 283 | } |
| 284 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 285 | if (ret) { |
| 286 | ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); |
| 287 | return ret; |
| 288 | } |
| 289 | qp_attr.qp_state = IB_QPS_RTR; |
| 290 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 291 | if (ret) { |
| 292 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); |
| 293 | return ret; |
| 294 | } |
| 295 | qp_attr.rq_psn = psn; |
| 296 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 297 | if (ret) { |
| 298 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); |
| 299 | return ret; |
| 300 | } |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 301 | |
| 302 | /* |
| 303 | * Current Mellanox HCA firmware won't generate completions |
| 304 | * with error for drain WRs unless the QP has been moved to |
| 305 | * RTS first. This work-around leaves a window where a QP has |
| 306 | * moved to error asynchronously, but this will eventually get |
| 307 | * fixed in firmware, so let's not error out if modify QP |
| 308 | * fails. |
| 309 | */ |
| 310 | qp_attr.qp_state = IB_QPS_RTS; |
| 311 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 312 | if (ret) { |
| 313 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); |
| 314 | return 0; |
| 315 | } |
| 316 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 317 | if (ret) { |
| 318 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); |
| 319 | return 0; |
| 320 | } |
| 321 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 322 | return 0; |
| 323 | } |
| 324 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 325 | static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_id, |
| 326 | struct ipoib_cm_rx *rx) |
| 327 | { |
| 328 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 329 | int ret; |
| 330 | int i; |
| 331 | |
| 332 | rx->rx_ring = kcalloc(ipoib_recvq_size, sizeof *rx->rx_ring, GFP_KERNEL); |
| 333 | if (!rx->rx_ring) |
| 334 | return -ENOMEM; |
| 335 | |
| 336 | spin_lock_irq(&priv->lock); |
| 337 | |
| 338 | if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) { |
| 339 | spin_unlock_irq(&priv->lock); |
| 340 | ib_send_cm_rej(cm_id, IB_CM_REJ_NO_QP, NULL, 0, NULL, 0); |
| 341 | ret = -EINVAL; |
| 342 | goto err_free; |
| 343 | } else |
| 344 | ++priv->cm.nonsrq_conn_qp; |
| 345 | |
| 346 | spin_unlock_irq(&priv->lock); |
| 347 | |
| 348 | for (i = 0; i < ipoib_recvq_size; ++i) { |
| 349 | if (!ipoib_cm_alloc_rx_skb(dev, rx->rx_ring, i, IPOIB_CM_RX_SG - 1, |
| 350 | rx->rx_ring[i].mapping)) { |
| 351 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
| 352 | ret = -ENOMEM; |
| 353 | goto err_count; |
| 354 | } |
| 355 | ret = ipoib_cm_post_receive_nonsrq(dev, rx, i); |
| 356 | if (ret) { |
| 357 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq " |
| 358 | "failed for buf %d\n", i); |
| 359 | ret = -EIO; |
| 360 | goto err_count; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | rx->recv_count = ipoib_recvq_size; |
| 365 | |
| 366 | return 0; |
| 367 | |
| 368 | err_count: |
| 369 | spin_lock_irq(&priv->lock); |
| 370 | --priv->cm.nonsrq_conn_qp; |
| 371 | spin_unlock_irq(&priv->lock); |
| 372 | |
| 373 | err_free: |
| 374 | ipoib_cm_free_rx_ring(dev, rx->rx_ring); |
| 375 | |
| 376 | return ret; |
| 377 | } |
| 378 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 379 | static int ipoib_cm_send_rep(struct net_device *dev, struct ib_cm_id *cm_id, |
| 380 | struct ib_qp *qp, struct ib_cm_req_event_param *req, |
| 381 | unsigned psn) |
| 382 | { |
| 383 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 384 | struct ipoib_cm_data data = {}; |
| 385 | struct ib_cm_rep_param rep = {}; |
| 386 | |
| 387 | data.qpn = cpu_to_be32(priv->qp->qp_num); |
| 388 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); |
| 389 | |
| 390 | rep.private_data = &data; |
| 391 | rep.private_data_len = sizeof data; |
| 392 | rep.flow_control = 0; |
| 393 | rep.rnr_retry_count = req->rnr_retry_count; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 394 | rep.srq = ipoib_cm_has_srq(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 395 | rep.qp_num = qp->qp_num; |
| 396 | rep.starting_psn = psn; |
| 397 | return ib_send_cm_rep(cm_id, &rep); |
| 398 | } |
| 399 | |
| 400 | static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) |
| 401 | { |
| 402 | struct net_device *dev = cm_id->context; |
| 403 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 404 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 405 | unsigned psn; |
| 406 | int ret; |
| 407 | |
| 408 | ipoib_dbg(priv, "REQ arrived\n"); |
| 409 | p = kzalloc(sizeof *p, GFP_KERNEL); |
| 410 | if (!p) |
| 411 | return -ENOMEM; |
| 412 | p->dev = dev; |
| 413 | p->id = cm_id; |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 414 | cm_id->context = p; |
| 415 | p->state = IPOIB_CM_RX_LIVE; |
| 416 | p->jiffies = jiffies; |
| 417 | INIT_LIST_HEAD(&p->list); |
| 418 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 419 | p->qp = ipoib_cm_create_rx_qp(dev, p); |
| 420 | if (IS_ERR(p->qp)) { |
| 421 | ret = PTR_ERR(p->qp); |
| 422 | goto err_qp; |
| 423 | } |
| 424 | |
| 425 | psn = random32() & 0xffffff; |
| 426 | ret = ipoib_cm_modify_rx_qp(dev, cm_id, p->qp, psn); |
| 427 | if (ret) |
| 428 | goto err_modify; |
| 429 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 430 | if (!ipoib_cm_has_srq(dev)) { |
| 431 | ret = ipoib_cm_nonsrq_init_rx(dev, cm_id, p); |
| 432 | if (ret) |
| 433 | goto err_modify; |
| 434 | } |
| 435 | |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 436 | spin_lock_irq(&priv->lock); |
| 437 | queue_delayed_work(ipoib_workqueue, |
| 438 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
| 439 | /* Add this entry to passive ids list head, but do not re-add it |
| 440 | * if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */ |
| 441 | p->jiffies = jiffies; |
| 442 | if (p->state == IPOIB_CM_RX_LIVE) |
| 443 | list_move(&p->list, &priv->cm.passive_ids); |
| 444 | spin_unlock_irq(&priv->lock); |
| 445 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 446 | ret = ipoib_cm_send_rep(dev, cm_id, p->qp, &event->param.req_rcvd, psn); |
| 447 | if (ret) { |
| 448 | ipoib_warn(priv, "failed to send REP: %d\n", ret); |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 449 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
| 450 | ipoib_warn(priv, "unable to move qp to error state\n"); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 451 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 452 | return 0; |
| 453 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 454 | err_modify: |
| 455 | ib_destroy_qp(p->qp); |
| 456 | err_qp: |
| 457 | kfree(p); |
| 458 | return ret; |
| 459 | } |
| 460 | |
| 461 | static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, |
| 462 | struct ib_cm_event *event) |
| 463 | { |
| 464 | struct ipoib_cm_rx *p; |
| 465 | struct ipoib_dev_priv *priv; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 466 | |
| 467 | switch (event->event) { |
| 468 | case IB_CM_REQ_RECEIVED: |
| 469 | return ipoib_cm_req_handler(cm_id, event); |
| 470 | case IB_CM_DREQ_RECEIVED: |
| 471 | p = cm_id->context; |
| 472 | ib_send_cm_drep(cm_id, NULL, 0); |
| 473 | /* Fall through */ |
| 474 | case IB_CM_REJ_RECEIVED: |
| 475 | p = cm_id->context; |
| 476 | priv = netdev_priv(p->dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 477 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
| 478 | ipoib_warn(priv, "unable to move qp to error state\n"); |
| 479 | /* Fall through */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 480 | default: |
| 481 | return 0; |
| 482 | } |
| 483 | } |
| 484 | /* Adjust length of skb with fragments to match received data */ |
| 485 | 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] | 486 | unsigned int length, struct sk_buff *toskb) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 487 | { |
| 488 | int i, num_frags; |
| 489 | unsigned int size; |
| 490 | |
| 491 | /* put header into skb */ |
| 492 | size = min(length, hdr_space); |
| 493 | skb->tail += size; |
| 494 | skb->len += size; |
| 495 | length -= size; |
| 496 | |
| 497 | num_frags = skb_shinfo(skb)->nr_frags; |
| 498 | for (i = 0; i < num_frags; i++) { |
| 499 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 500 | |
| 501 | if (length == 0) { |
| 502 | /* don't need this page */ |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 503 | skb_fill_page_desc(toskb, i, frag->page, 0, PAGE_SIZE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 504 | --skb_shinfo(skb)->nr_frags; |
| 505 | } else { |
| 506 | size = min(length, (unsigned) PAGE_SIZE); |
| 507 | |
| 508 | frag->size = size; |
| 509 | skb->data_len += size; |
| 510 | skb->truesize += size; |
| 511 | skb->len += size; |
| 512 | length -= size; |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
| 518 | { |
| 519 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 520 | struct ipoib_cm_rx_buf *rx_ring; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 521 | 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] | 522 | struct sk_buff *skb, *newskb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 523 | struct ipoib_cm_rx *p; |
| 524 | unsigned long flags; |
| 525 | u64 mapping[IPOIB_CM_RX_SG]; |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 526 | int frags; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 527 | int has_srq; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 528 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 529 | ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n", |
| 530 | wr_id, wc->status); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 531 | |
| 532 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 533 | 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] | 534 | spin_lock_irqsave(&priv->lock, flags); |
| 535 | list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list); |
| 536 | ipoib_cm_start_rx_drain(priv); |
| 537 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); |
| 538 | spin_unlock_irqrestore(&priv->lock, flags); |
| 539 | } else |
| 540 | ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", |
| 541 | wr_id, ipoib_recvq_size); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 542 | return; |
| 543 | } |
| 544 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 545 | p = wc->qp->qp_context; |
| 546 | |
| 547 | has_srq = ipoib_cm_has_srq(dev); |
| 548 | rx_ring = has_srq ? priv->cm.srq_ring : p->rx_ring; |
| 549 | |
| 550 | skb = rx_ring[wr_id].skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 551 | |
| 552 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
| 553 | ipoib_dbg(priv, "cm recv error " |
| 554 | "(status=%d, wrid=%d vend_err %x)\n", |
| 555 | wc->status, wr_id, wc->vendor_err); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 556 | ++dev->stats.rx_dropped; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 557 | if (has_srq) |
| 558 | goto repost; |
| 559 | else { |
| 560 | if (!--p->recv_count) { |
| 561 | spin_lock_irqsave(&priv->lock, flags); |
| 562 | list_move(&p->list, &priv->cm.rx_reap_list); |
| 563 | spin_unlock_irqrestore(&priv->lock, flags); |
| 564 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); |
| 565 | } |
| 566 | return; |
| 567 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 568 | } |
| 569 | |
Roland Dreier | fd31256 | 2007-10-17 21:54:44 -0700 | [diff] [blame] | 570 | if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) { |
Michael S. Tsirkin | d6ef7d6 | 2007-05-02 15:31:12 +0300 | [diff] [blame] | 571 | 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] | 572 | spin_lock_irqsave(&priv->lock, flags); |
| 573 | p->jiffies = jiffies; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 574 | /* Move this entry to list head, but do not re-add it |
| 575 | * if it has been moved out of list. */ |
| 576 | if (p->state == IPOIB_CM_RX_LIVE) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 577 | list_move(&p->list, &priv->cm.passive_ids); |
| 578 | spin_unlock_irqrestore(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 579 | } |
| 580 | } |
| 581 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 582 | frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len, |
| 583 | (unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE; |
| 584 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 585 | newskb = ipoib_cm_alloc_rx_skb(dev, rx_ring, wr_id, frags, mapping); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 586 | if (unlikely(!newskb)) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 587 | /* |
| 588 | * If we can't allocate a new RX buffer, dump |
| 589 | * this packet and reuse the old buffer. |
| 590 | */ |
| 591 | ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 592 | ++dev->stats.rx_dropped; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 593 | goto repost; |
| 594 | } |
| 595 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 596 | ipoib_cm_dma_unmap_rx(priv, frags, rx_ring[wr_id].mapping); |
| 597 | memcpy(rx_ring[wr_id].mapping, mapping, (frags + 1) * sizeof *mapping); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 598 | |
| 599 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", |
| 600 | wc->byte_len, wc->slid); |
| 601 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 602 | 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] | 603 | |
| 604 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 605 | skb_reset_mac_header(skb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 606 | skb_pull(skb, IPOIB_ENCAP_LEN); |
| 607 | |
| 608 | dev->last_rx = jiffies; |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 609 | ++dev->stats.rx_packets; |
| 610 | dev->stats.rx_bytes += skb->len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 611 | |
| 612 | skb->dev = dev; |
| 613 | /* XXX get correct PACKET_ type here */ |
| 614 | skb->pkt_type = PACKET_HOST; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 615 | netif_receive_skb(skb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 616 | |
| 617 | repost: |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 618 | if (has_srq) { |
| 619 | if (unlikely(ipoib_cm_post_receive_srq(dev, wr_id))) |
| 620 | ipoib_warn(priv, "ipoib_cm_post_receive_srq failed " |
| 621 | "for buf %d\n", wr_id); |
| 622 | } else { |
| 623 | if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p, wr_id))) { |
| 624 | --p->recv_count; |
| 625 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed " |
| 626 | "for buf %d\n", wr_id); |
| 627 | } |
| 628 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | static inline int post_send(struct ipoib_dev_priv *priv, |
| 632 | struct ipoib_cm_tx *tx, |
| 633 | unsigned int wr_id, |
| 634 | u64 addr, int len) |
| 635 | { |
| 636 | struct ib_send_wr *bad_wr; |
| 637 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 638 | priv->tx_sge[0].addr = addr; |
| 639 | priv->tx_sge[0].length = len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 640 | |
Roland Dreier | 4200406 | 2008-03-11 18:35:20 -0700 | [diff] [blame] | 641 | priv->tx_wr.num_sge = 1; |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 642 | priv->tx_wr.wr_id = wr_id | IPOIB_OP_CM; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 643 | |
| 644 | return ib_post_send(tx->qp, &priv->tx_wr, &bad_wr); |
| 645 | } |
| 646 | |
| 647 | void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx) |
| 648 | { |
| 649 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 650 | struct ipoib_tx_buf *tx_req; |
| 651 | u64 addr; |
| 652 | |
| 653 | if (unlikely(skb->len > tx->mtu)) { |
| 654 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", |
| 655 | skb->len, tx->mtu); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 656 | ++dev->stats.tx_dropped; |
| 657 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 77d8e1e | 2007-03-21 15:45:05 +0200 | [diff] [blame] | 658 | 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] | 659 | return; |
| 660 | } |
| 661 | |
| 662 | ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", |
| 663 | tx->tx_head, skb->len, tx->qp->qp_num); |
| 664 | |
| 665 | /* |
| 666 | * We put the skb into the tx_ring _before_ we call post_send() |
| 667 | * because it's entirely possible that the completion handler will |
| 668 | * run before we execute anything after the post_send(). That |
| 669 | * means we have to make sure everything is properly recorded and |
| 670 | * our state is consistent before we call post_send(). |
| 671 | */ |
| 672 | tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; |
| 673 | tx_req->skb = skb; |
| 674 | addr = ib_dma_map_single(priv->ca, skb->data, skb->len, DMA_TO_DEVICE); |
| 675 | if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 676 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 677 | dev_kfree_skb_any(skb); |
| 678 | return; |
| 679 | } |
| 680 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 681 | tx_req->mapping[0] = addr; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 682 | |
| 683 | if (unlikely(post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 684 | addr, skb->len))) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 685 | ipoib_warn(priv, "post_send failed\n"); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 686 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 687 | ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE); |
| 688 | dev_kfree_skb_any(skb); |
| 689 | } else { |
| 690 | dev->trans_start = jiffies; |
| 691 | ++tx->tx_head; |
| 692 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 693 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 694 | ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", |
| 695 | tx->qp->qp_num); |
| 696 | netif_stop_queue(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 697 | } |
| 698 | } |
| 699 | } |
| 700 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 701 | 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] | 702 | { |
| 703 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 704 | struct ipoib_cm_tx *tx = wc->qp->qp_context; |
| 705 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 706 | struct ipoib_tx_buf *tx_req; |
| 707 | unsigned long flags; |
| 708 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 709 | ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", |
| 710 | wr_id, wc->status); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 711 | |
| 712 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
| 713 | ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", |
| 714 | wr_id, ipoib_sendq_size); |
| 715 | return; |
| 716 | } |
| 717 | |
| 718 | tx_req = &tx->tx_ring[wr_id]; |
| 719 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 720 | ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len, DMA_TO_DEVICE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 721 | |
| 722 | /* FIXME: is this right? Shouldn't we only increment on success? */ |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 723 | ++dev->stats.tx_packets; |
| 724 | dev->stats.tx_bytes += tx_req->skb->len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 725 | |
| 726 | dev_kfree_skb_any(tx_req->skb); |
| 727 | |
| 728 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 729 | ++tx->tx_tail; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 730 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
| 731 | netif_queue_stopped(dev) && |
| 732 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 733 | netif_wake_queue(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 734 | |
| 735 | if (wc->status != IB_WC_SUCCESS && |
| 736 | wc->status != IB_WC_WR_FLUSH_ERR) { |
| 737 | struct ipoib_neigh *neigh; |
| 738 | |
| 739 | ipoib_dbg(priv, "failed cm send event " |
| 740 | "(status=%d, wrid=%d vend_err %x)\n", |
| 741 | wc->status, wr_id, wc->vendor_err); |
| 742 | |
| 743 | spin_lock(&priv->lock); |
| 744 | neigh = tx->neigh; |
| 745 | |
| 746 | if (neigh) { |
| 747 | neigh->cm = NULL; |
| 748 | list_del(&neigh->list); |
| 749 | if (neigh->ah) |
| 750 | ipoib_put_ah(neigh->ah); |
| 751 | ipoib_neigh_free(dev, neigh); |
| 752 | |
| 753 | tx->neigh = NULL; |
| 754 | } |
| 755 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 756 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 757 | list_move(&tx->list, &priv->cm.reap_list); |
| 758 | queue_work(ipoib_workqueue, &priv->cm.reap_task); |
| 759 | } |
| 760 | |
| 761 | clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); |
| 762 | |
| 763 | spin_unlock(&priv->lock); |
| 764 | } |
| 765 | |
| 766 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 767 | } |
| 768 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 769 | int ipoib_cm_dev_open(struct net_device *dev) |
| 770 | { |
| 771 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 772 | int ret; |
| 773 | |
| 774 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) |
| 775 | return 0; |
| 776 | |
| 777 | priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); |
| 778 | if (IS_ERR(priv->cm.id)) { |
| 779 | 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] | 780 | ret = PTR_ERR(priv->cm.id); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 781 | goto err_cm; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 782 | } |
| 783 | |
| 784 | ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), |
| 785 | 0, NULL); |
| 786 | if (ret) { |
| 787 | printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, |
| 788 | IPOIB_CM_IETF_ID | priv->qp->qp_num); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 789 | goto err_listen; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 790 | } |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 791 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 792 | return 0; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 793 | |
| 794 | err_listen: |
| 795 | ib_destroy_cm_id(priv->cm.id); |
| 796 | err_cm: |
| 797 | priv->cm.id = NULL; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 798 | return ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 799 | } |
| 800 | |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 801 | static void ipoib_cm_free_rx_reap_list(struct net_device *dev) |
| 802 | { |
| 803 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 804 | struct ipoib_cm_rx *rx, *n; |
| 805 | LIST_HEAD(list); |
| 806 | |
| 807 | spin_lock_irq(&priv->lock); |
| 808 | list_splice_init(&priv->cm.rx_reap_list, &list); |
| 809 | spin_unlock_irq(&priv->lock); |
| 810 | |
| 811 | list_for_each_entry_safe(rx, n, &list, list) { |
| 812 | ib_destroy_cm_id(rx->id); |
| 813 | ib_destroy_qp(rx->qp); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 814 | if (!ipoib_cm_has_srq(dev)) { |
| 815 | ipoib_cm_free_rx_ring(priv->dev, rx->rx_ring); |
| 816 | spin_lock_irq(&priv->lock); |
| 817 | --priv->cm.nonsrq_conn_qp; |
| 818 | spin_unlock_irq(&priv->lock); |
| 819 | } |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 820 | kfree(rx); |
| 821 | } |
| 822 | } |
| 823 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 824 | void ipoib_cm_dev_stop(struct net_device *dev) |
| 825 | { |
| 826 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 827 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 828 | unsigned long begin; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 829 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 830 | |
Michael S. Tsirkin | 347fcfb | 2007-04-30 17:30:28 -0700 | [diff] [blame] | 831 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr) || !priv->cm.id) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 832 | return; |
| 833 | |
| 834 | ib_destroy_cm_id(priv->cm.id); |
Michael S. Tsirkin | 347fcfb | 2007-04-30 17:30:28 -0700 | [diff] [blame] | 835 | priv->cm.id = NULL; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 836 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 837 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 838 | while (!list_empty(&priv->cm.passive_ids)) { |
| 839 | p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 840 | list_move(&p->list, &priv->cm.rx_error_list); |
| 841 | p->state = IPOIB_CM_RX_ERROR; |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 842 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 843 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
| 844 | if (ret) |
| 845 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); |
| 846 | spin_lock_irq(&priv->lock); |
| 847 | } |
| 848 | |
| 849 | /* Wait for all RX to be drained */ |
| 850 | begin = jiffies; |
| 851 | |
| 852 | while (!list_empty(&priv->cm.rx_error_list) || |
| 853 | !list_empty(&priv->cm.rx_flush_list) || |
| 854 | !list_empty(&priv->cm.rx_drain_list)) { |
Michael S. Tsirkin | 8fd357a | 2007-05-24 14:02:39 -0700 | [diff] [blame] | 855 | if (time_after(jiffies, begin + 5 * HZ)) { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 856 | ipoib_warn(priv, "RX drain timing out\n"); |
| 857 | |
| 858 | /* |
| 859 | * assume the HW is wedged and just free up everything. |
| 860 | */ |
Pradeep Satyanarayana | ec229e5 | 2008-02-12 15:00:59 -0800 | [diff] [blame] | 861 | list_splice_init(&priv->cm.rx_flush_list, |
| 862 | &priv->cm.rx_reap_list); |
| 863 | list_splice_init(&priv->cm.rx_error_list, |
| 864 | &priv->cm.rx_reap_list); |
| 865 | list_splice_init(&priv->cm.rx_drain_list, |
| 866 | &priv->cm.rx_reap_list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 867 | break; |
| 868 | } |
| 869 | spin_unlock_irq(&priv->lock); |
| 870 | msleep(1); |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 871 | ipoib_drain_cq(dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 872 | spin_lock_irq(&priv->lock); |
| 873 | } |
| 874 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 875 | spin_unlock_irq(&priv->lock); |
| 876 | |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 877 | ipoib_cm_free_rx_reap_list(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 878 | |
| 879 | cancel_delayed_work(&priv->cm.stale_task); |
| 880 | } |
| 881 | |
| 882 | static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) |
| 883 | { |
| 884 | struct ipoib_cm_tx *p = cm_id->context; |
| 885 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 886 | struct ipoib_cm_data *data = event->private_data; |
| 887 | struct sk_buff_head skqueue; |
| 888 | struct ib_qp_attr qp_attr; |
| 889 | int qp_attr_mask, ret; |
| 890 | struct sk_buff *skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 891 | |
| 892 | p->mtu = be32_to_cpu(data->mtu); |
| 893 | |
Michael S. Tsirkin | 82c3aca | 2007-06-20 19:22:15 +0300 | [diff] [blame] | 894 | if (p->mtu <= IPOIB_ENCAP_LEN) { |
| 895 | ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n", |
| 896 | p->mtu, IPOIB_ENCAP_LEN); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 897 | return -EINVAL; |
| 898 | } |
| 899 | |
| 900 | qp_attr.qp_state = IB_QPS_RTR; |
| 901 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 902 | if (ret) { |
| 903 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); |
| 904 | return ret; |
| 905 | } |
| 906 | |
| 907 | qp_attr.rq_psn = 0 /* FIXME */; |
| 908 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); |
| 909 | if (ret) { |
| 910 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); |
| 911 | return ret; |
| 912 | } |
| 913 | |
| 914 | qp_attr.qp_state = IB_QPS_RTS; |
| 915 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 916 | if (ret) { |
| 917 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); |
| 918 | return ret; |
| 919 | } |
| 920 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); |
| 921 | if (ret) { |
| 922 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); |
| 923 | return ret; |
| 924 | } |
| 925 | |
| 926 | skb_queue_head_init(&skqueue); |
| 927 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 928 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 929 | set_bit(IPOIB_FLAG_OPER_UP, &p->flags); |
| 930 | if (p->neigh) |
| 931 | while ((skb = __skb_dequeue(&p->neigh->queue))) |
| 932 | __skb_queue_tail(&skqueue, skb); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 933 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 934 | |
| 935 | while ((skb = __skb_dequeue(&skqueue))) { |
| 936 | skb->dev = p->dev; |
| 937 | if (dev_queue_xmit(skb)) |
| 938 | ipoib_warn(priv, "dev_queue_xmit failed " |
| 939 | "to requeue packet\n"); |
| 940 | } |
| 941 | |
| 942 | ret = ib_send_cm_rtu(cm_id, NULL, 0); |
| 943 | if (ret) { |
| 944 | ipoib_warn(priv, "failed to send RTU: %d\n", ret); |
| 945 | return ret; |
| 946 | } |
| 947 | return 0; |
| 948 | } |
| 949 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 950 | 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] | 951 | { |
| 952 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 953 | struct ib_qp_init_attr attr = { |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 954 | .send_cq = priv->recv_cq, |
| 955 | .recv_cq = priv->recv_cq, |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 956 | .srq = priv->cm.srq, |
| 957 | .cap.max_send_wr = ipoib_sendq_size, |
| 958 | .cap.max_send_sge = 1, |
| 959 | .sq_sig_type = IB_SIGNAL_ALL_WR, |
| 960 | .qp_type = IB_QPT_RC, |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 961 | .qp_context = tx |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 962 | }; |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 963 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 964 | return ib_create_qp(priv->pd, &attr); |
| 965 | } |
| 966 | |
| 967 | static int ipoib_cm_send_req(struct net_device *dev, |
| 968 | struct ib_cm_id *id, struct ib_qp *qp, |
| 969 | u32 qpn, |
| 970 | struct ib_sa_path_rec *pathrec) |
| 971 | { |
| 972 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 973 | struct ipoib_cm_data data = {}; |
| 974 | struct ib_cm_req_param req = {}; |
| 975 | |
| 976 | data.qpn = cpu_to_be32(priv->qp->qp_num); |
| 977 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); |
| 978 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 979 | req.primary_path = pathrec; |
| 980 | req.alternate_path = NULL; |
| 981 | req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); |
| 982 | req.qp_num = qp->qp_num; |
| 983 | req.qp_type = qp->qp_type; |
| 984 | req.private_data = &data; |
| 985 | req.private_data_len = sizeof data; |
| 986 | req.flow_control = 0; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 987 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 988 | req.starting_psn = 0; /* FIXME */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 989 | |
| 990 | /* |
| 991 | * Pick some arbitrary defaults here; we could make these |
| 992 | * module parameters if anyone cared about setting them. |
| 993 | */ |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 994 | req.responder_resources = 4; |
| 995 | req.remote_cm_response_timeout = 20; |
| 996 | req.local_cm_response_timeout = 20; |
| 997 | req.retry_count = 0; /* RFC draft warns against retries */ |
| 998 | req.rnr_retry_count = 0; /* RFC draft warns against retries */ |
| 999 | req.max_cm_retries = 15; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1000 | req.srq = ipoib_cm_has_srq(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1001 | return ib_send_cm_req(id, &req); |
| 1002 | } |
| 1003 | |
| 1004 | static int ipoib_cm_modify_tx_init(struct net_device *dev, |
| 1005 | struct ib_cm_id *cm_id, struct ib_qp *qp) |
| 1006 | { |
| 1007 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1008 | struct ib_qp_attr qp_attr; |
| 1009 | int qp_attr_mask, ret; |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 1010 | 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] | 1011 | if (ret) { |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 1012 | 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] | 1013 | return ret; |
| 1014 | } |
| 1015 | |
| 1016 | qp_attr.qp_state = IB_QPS_INIT; |
| 1017 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; |
| 1018 | qp_attr.port_num = priv->port; |
| 1019 | qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; |
| 1020 | |
| 1021 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 1022 | if (ret) { |
| 1023 | ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); |
| 1024 | return ret; |
| 1025 | } |
| 1026 | return 0; |
| 1027 | } |
| 1028 | |
| 1029 | static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, |
| 1030 | struct ib_sa_path_rec *pathrec) |
| 1031 | { |
| 1032 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 1033 | int ret; |
| 1034 | |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1035 | p->tx_ring = vmalloc(ipoib_sendq_size * sizeof *p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1036 | if (!p->tx_ring) { |
| 1037 | ipoib_warn(priv, "failed to allocate tx ring\n"); |
| 1038 | ret = -ENOMEM; |
| 1039 | goto err_tx; |
| 1040 | } |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1041 | 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] | 1042 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1043 | p->qp = ipoib_cm_create_tx_qp(p->dev, p); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1044 | if (IS_ERR(p->qp)) { |
| 1045 | ret = PTR_ERR(p->qp); |
| 1046 | ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); |
| 1047 | goto err_qp; |
| 1048 | } |
| 1049 | |
| 1050 | p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); |
| 1051 | if (IS_ERR(p->id)) { |
| 1052 | ret = PTR_ERR(p->id); |
| 1053 | ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); |
| 1054 | goto err_id; |
| 1055 | } |
| 1056 | |
| 1057 | ret = ipoib_cm_modify_tx_init(p->dev, p->id, p->qp); |
| 1058 | if (ret) { |
| 1059 | ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); |
| 1060 | goto err_modify; |
| 1061 | } |
| 1062 | |
| 1063 | ret = ipoib_cm_send_req(p->dev, p->id, p->qp, qpn, pathrec); |
| 1064 | if (ret) { |
| 1065 | ipoib_warn(priv, "failed to send cm req: %d\n", ret); |
| 1066 | goto err_send_cm; |
| 1067 | } |
| 1068 | |
| 1069 | ipoib_dbg(priv, "Request connection 0x%x for gid " IPOIB_GID_FMT " qpn 0x%x\n", |
| 1070 | p->qp->qp_num, IPOIB_GID_ARG(pathrec->dgid), qpn); |
| 1071 | |
| 1072 | return 0; |
| 1073 | |
| 1074 | err_send_cm: |
| 1075 | err_modify: |
| 1076 | ib_destroy_cm_id(p->id); |
| 1077 | err_id: |
| 1078 | p->id = NULL; |
| 1079 | ib_destroy_qp(p->qp); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1080 | err_qp: |
| 1081 | p->qp = NULL; |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1082 | vfree(p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1083 | err_tx: |
| 1084 | return ret; |
| 1085 | } |
| 1086 | |
| 1087 | static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) |
| 1088 | { |
| 1089 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 1090 | struct ipoib_tx_buf *tx_req; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1091 | unsigned long flags; |
| 1092 | unsigned long begin; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1093 | |
| 1094 | ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", |
| 1095 | p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); |
| 1096 | |
| 1097 | if (p->id) |
| 1098 | ib_destroy_cm_id(p->id); |
| 1099 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1100 | if (p->tx_ring) { |
| 1101 | /* Wait for all sends to complete */ |
| 1102 | begin = jiffies; |
| 1103 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
| 1104 | if (time_after(jiffies, begin + 5 * HZ)) { |
| 1105 | ipoib_warn(priv, "timing out; %d sends not completed\n", |
| 1106 | p->tx_head - p->tx_tail); |
| 1107 | goto timeout; |
| 1108 | } |
| 1109 | |
| 1110 | msleep(1); |
| 1111 | } |
| 1112 | } |
| 1113 | |
| 1114 | timeout: |
| 1115 | |
| 1116 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
| 1117 | tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 1118 | ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len, |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1119 | DMA_TO_DEVICE); |
| 1120 | dev_kfree_skb_any(tx_req->skb); |
| 1121 | ++p->tx_tail; |
| 1122 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 1123 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
| 1124 | netif_queue_stopped(p->dev) && |
| 1125 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
| 1126 | netif_wake_queue(p->dev); |
| 1127 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 1128 | } |
| 1129 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1130 | if (p->qp) |
| 1131 | ib_destroy_qp(p->qp); |
| 1132 | |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1133 | vfree(p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1134 | kfree(p); |
| 1135 | } |
| 1136 | |
| 1137 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
| 1138 | struct ib_cm_event *event) |
| 1139 | { |
| 1140 | struct ipoib_cm_tx *tx = cm_id->context; |
| 1141 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); |
| 1142 | struct net_device *dev = priv->dev; |
| 1143 | struct ipoib_neigh *neigh; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1144 | int ret; |
| 1145 | |
| 1146 | switch (event->event) { |
| 1147 | case IB_CM_DREQ_RECEIVED: |
| 1148 | ipoib_dbg(priv, "DREQ received.\n"); |
| 1149 | ib_send_cm_drep(cm_id, NULL, 0); |
| 1150 | break; |
| 1151 | case IB_CM_REP_RECEIVED: |
| 1152 | ipoib_dbg(priv, "REP received.\n"); |
| 1153 | ret = ipoib_cm_rep_handler(cm_id, event); |
| 1154 | if (ret) |
| 1155 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 1156 | NULL, 0, NULL, 0); |
| 1157 | break; |
| 1158 | case IB_CM_REQ_ERROR: |
| 1159 | case IB_CM_REJ_RECEIVED: |
| 1160 | case IB_CM_TIMEWAIT_EXIT: |
| 1161 | ipoib_dbg(priv, "CM error %d.\n", event->event); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1162 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1163 | spin_lock(&priv->lock); |
| 1164 | neigh = tx->neigh; |
| 1165 | |
| 1166 | if (neigh) { |
| 1167 | neigh->cm = NULL; |
| 1168 | list_del(&neigh->list); |
| 1169 | if (neigh->ah) |
| 1170 | ipoib_put_ah(neigh->ah); |
| 1171 | ipoib_neigh_free(dev, neigh); |
| 1172 | |
| 1173 | tx->neigh = NULL; |
| 1174 | } |
| 1175 | |
| 1176 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 1177 | list_move(&tx->list, &priv->cm.reap_list); |
| 1178 | queue_work(ipoib_workqueue, &priv->cm.reap_task); |
| 1179 | } |
| 1180 | |
| 1181 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1182 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1183 | break; |
| 1184 | default: |
| 1185 | break; |
| 1186 | } |
| 1187 | |
| 1188 | return 0; |
| 1189 | } |
| 1190 | |
| 1191 | struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path, |
| 1192 | struct ipoib_neigh *neigh) |
| 1193 | { |
| 1194 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1195 | struct ipoib_cm_tx *tx; |
| 1196 | |
| 1197 | tx = kzalloc(sizeof *tx, GFP_ATOMIC); |
| 1198 | if (!tx) |
| 1199 | return NULL; |
| 1200 | |
| 1201 | neigh->cm = tx; |
| 1202 | tx->neigh = neigh; |
| 1203 | tx->path = path; |
| 1204 | tx->dev = dev; |
| 1205 | list_add(&tx->list, &priv->cm.start_list); |
| 1206 | set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); |
| 1207 | queue_work(ipoib_workqueue, &priv->cm.start_task); |
| 1208 | return tx; |
| 1209 | } |
| 1210 | |
| 1211 | void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) |
| 1212 | { |
| 1213 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); |
| 1214 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 1215 | list_move(&tx->list, &priv->cm.reap_list); |
| 1216 | queue_work(ipoib_workqueue, &priv->cm.reap_task); |
| 1217 | ipoib_dbg(priv, "Reap connection for gid " IPOIB_GID_FMT "\n", |
| 1218 | IPOIB_GID_ARG(tx->neigh->dgid)); |
| 1219 | tx->neigh = NULL; |
| 1220 | } |
| 1221 | } |
| 1222 | |
| 1223 | static void ipoib_cm_tx_start(struct work_struct *work) |
| 1224 | { |
| 1225 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1226 | cm.start_task); |
| 1227 | struct net_device *dev = priv->dev; |
| 1228 | struct ipoib_neigh *neigh; |
| 1229 | struct ipoib_cm_tx *p; |
| 1230 | unsigned long flags; |
| 1231 | int ret; |
| 1232 | |
| 1233 | struct ib_sa_path_rec pathrec; |
| 1234 | u32 qpn; |
| 1235 | |
| 1236 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 1237 | spin_lock(&priv->lock); |
| 1238 | while (!list_empty(&priv->cm.start_list)) { |
| 1239 | p = list_entry(priv->cm.start_list.next, typeof(*p), list); |
| 1240 | list_del_init(&p->list); |
| 1241 | neigh = p->neigh; |
| 1242 | qpn = IPOIB_QPN(neigh->neighbour->ha); |
| 1243 | memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); |
| 1244 | spin_unlock(&priv->lock); |
| 1245 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 1246 | ret = ipoib_cm_tx_init(p, qpn, &pathrec); |
| 1247 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 1248 | spin_lock(&priv->lock); |
| 1249 | if (ret) { |
| 1250 | neigh = p->neigh; |
| 1251 | if (neigh) { |
| 1252 | neigh->cm = NULL; |
| 1253 | list_del(&neigh->list); |
| 1254 | if (neigh->ah) |
| 1255 | ipoib_put_ah(neigh->ah); |
| 1256 | ipoib_neigh_free(dev, neigh); |
| 1257 | } |
| 1258 | list_del(&p->list); |
| 1259 | kfree(p); |
| 1260 | } |
| 1261 | } |
| 1262 | spin_unlock(&priv->lock); |
| 1263 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 1264 | } |
| 1265 | |
| 1266 | static void ipoib_cm_tx_reap(struct work_struct *work) |
| 1267 | { |
| 1268 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1269 | cm.reap_task); |
| 1270 | struct ipoib_cm_tx *p; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1271 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1272 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1273 | spin_lock(&priv->lock); |
| 1274 | while (!list_empty(&priv->cm.reap_list)) { |
| 1275 | p = list_entry(priv->cm.reap_list.next, typeof(*p), list); |
| 1276 | list_del(&p->list); |
| 1277 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1278 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1279 | ipoib_cm_tx_destroy(p); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1280 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1281 | spin_lock(&priv->lock); |
| 1282 | } |
| 1283 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1284 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1285 | } |
| 1286 | |
| 1287 | static void ipoib_cm_skb_reap(struct work_struct *work) |
| 1288 | { |
| 1289 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1290 | cm.skb_task); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1291 | struct sk_buff *skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1292 | |
| 1293 | unsigned mtu = priv->mcast_mtu; |
| 1294 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1295 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1296 | spin_lock(&priv->lock); |
| 1297 | while ((skb = skb_dequeue(&priv->cm.skb_queue))) { |
| 1298 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1299 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1300 | if (skb->protocol == htons(ETH_P_IP)) |
| 1301 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); |
| 1302 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 1303 | else if (skb->protocol == htons(ETH_P_IPV6)) |
Roland Dreier | 20089ca | 2007-07-10 11:18:34 -0700 | [diff] [blame] | 1304 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, priv->dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1305 | #endif |
| 1306 | dev_kfree_skb_any(skb); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1307 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1308 | spin_lock(&priv->lock); |
| 1309 | } |
| 1310 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1311 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1312 | } |
| 1313 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1314 | 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] | 1315 | unsigned int mtu) |
| 1316 | { |
| 1317 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1318 | int e = skb_queue_empty(&priv->cm.skb_queue); |
| 1319 | |
| 1320 | if (skb->dst) |
| 1321 | skb->dst->ops->update_pmtu(skb->dst, mtu); |
| 1322 | |
| 1323 | skb_queue_tail(&priv->cm.skb_queue, skb); |
| 1324 | if (e) |
| 1325 | queue_work(ipoib_workqueue, &priv->cm.skb_task); |
| 1326 | } |
| 1327 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1328 | static void ipoib_cm_rx_reap(struct work_struct *work) |
| 1329 | { |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1330 | ipoib_cm_free_rx_reap_list(container_of(work, struct ipoib_dev_priv, |
| 1331 | cm.rx_reap_task)->dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1332 | } |
| 1333 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1334 | static void ipoib_cm_stale_task(struct work_struct *work) |
| 1335 | { |
| 1336 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1337 | cm.stale_task.work); |
| 1338 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1339 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1340 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1341 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1342 | while (!list_empty(&priv->cm.passive_ids)) { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1343 | /* List is sorted by LRU, start from tail, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1344 | * stop when we see a recently used entry */ |
| 1345 | p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); |
Michael S. Tsirkin | 60a596d | 2007-03-22 14:32:09 -0700 | [diff] [blame] | 1346 | if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1347 | break; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1348 | list_move(&p->list, &priv->cm.rx_error_list); |
| 1349 | p->state = IPOIB_CM_RX_ERROR; |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1350 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1351 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
| 1352 | if (ret) |
| 1353 | 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] | 1354 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1355 | } |
Michael S. Tsirkin | 7c5b9ef | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 1356 | |
| 1357 | if (!list_empty(&priv->cm.passive_ids)) |
| 1358 | queue_delayed_work(ipoib_workqueue, |
| 1359 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1360 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1361 | } |
| 1362 | |
| 1363 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1364 | 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] | 1365 | char *buf) |
| 1366 | { |
| 1367 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(d)); |
| 1368 | |
| 1369 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) |
| 1370 | return sprintf(buf, "connected\n"); |
| 1371 | else |
| 1372 | return sprintf(buf, "datagram\n"); |
| 1373 | } |
| 1374 | |
| 1375 | static ssize_t set_mode(struct device *d, struct device_attribute *attr, |
| 1376 | const char *buf, size_t count) |
| 1377 | { |
| 1378 | struct net_device *dev = to_net_dev(d); |
| 1379 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1380 | |
| 1381 | /* flush paths if we switch modes so that connections are restarted */ |
| 1382 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { |
| 1383 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); |
| 1384 | ipoib_warn(priv, "enabling connected mode " |
| 1385 | "will cause multicast packet drops\n"); |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1386 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 1387 | dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO); |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1388 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; |
| 1389 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1390 | ipoib_flush_paths(dev); |
| 1391 | return count; |
| 1392 | } |
| 1393 | |
| 1394 | if (!strcmp(buf, "datagram\n")) { |
| 1395 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); |
| 1396 | dev->mtu = min(priv->mcast_mtu, dev->mtu); |
| 1397 | ipoib_flush_paths(dev); |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1398 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 1399 | if (test_bit(IPOIB_FLAG_CSUM, &priv->flags)) { |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1400 | dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 1401 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
| 1402 | dev->features |= NETIF_F_TSO; |
| 1403 | } |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1404 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1405 | return count; |
| 1406 | } |
| 1407 | |
| 1408 | return -EINVAL; |
| 1409 | } |
| 1410 | |
Roland Dreier | 551fd61 | 2007-02-16 13:57:33 -0800 | [diff] [blame] | 1411 | 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] | 1412 | |
| 1413 | int ipoib_cm_add_mode_attr(struct net_device *dev) |
| 1414 | { |
| 1415 | return device_create_file(&dev->dev, &dev_attr_mode); |
| 1416 | } |
| 1417 | |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1418 | 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] | 1419 | { |
| 1420 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1421 | struct ib_srq_init_attr srq_init_attr = { |
| 1422 | .attr = { |
| 1423 | .max_wr = ipoib_recvq_size, |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1424 | .max_sge = max_sge |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1425 | } |
| 1426 | }; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1427 | |
| 1428 | priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); |
| 1429 | if (IS_ERR(priv->cm.srq)) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1430 | if (PTR_ERR(priv->cm.srq) != -ENOSYS) |
| 1431 | printk(KERN_WARNING "%s: failed to allocate SRQ, error %ld\n", |
| 1432 | priv->ca->name, PTR_ERR(priv->cm.srq)); |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1433 | priv->cm.srq = NULL; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1434 | return; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1435 | } |
| 1436 | |
| 1437 | priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring, |
| 1438 | GFP_KERNEL); |
| 1439 | if (!priv->cm.srq_ring) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1440 | 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] | 1441 | priv->ca->name, ipoib_recvq_size); |
| 1442 | ib_destroy_srq(priv->cm.srq); |
| 1443 | priv->cm.srq = NULL; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1444 | } |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1445 | } |
| 1446 | |
| 1447 | int ipoib_cm_dev_init(struct net_device *dev) |
| 1448 | { |
| 1449 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1450 | int i, ret; |
| 1451 | struct ib_device_attr attr; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1452 | |
| 1453 | INIT_LIST_HEAD(&priv->cm.passive_ids); |
| 1454 | INIT_LIST_HEAD(&priv->cm.reap_list); |
| 1455 | INIT_LIST_HEAD(&priv->cm.start_list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1456 | INIT_LIST_HEAD(&priv->cm.rx_error_list); |
| 1457 | INIT_LIST_HEAD(&priv->cm.rx_flush_list); |
| 1458 | INIT_LIST_HEAD(&priv->cm.rx_drain_list); |
| 1459 | INIT_LIST_HEAD(&priv->cm.rx_reap_list); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1460 | INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); |
| 1461 | INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); |
| 1462 | INIT_WORK(&priv->cm.skb_task, ipoib_cm_skb_reap); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1463 | INIT_WORK(&priv->cm.rx_reap_task, ipoib_cm_rx_reap); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1464 | INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); |
| 1465 | |
| 1466 | skb_queue_head_init(&priv->cm.skb_queue); |
| 1467 | |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1468 | ret = ib_query_device(priv->ca, &attr); |
| 1469 | if (ret) { |
| 1470 | printk(KERN_WARNING "ib_query_device() failed with %d\n", ret); |
| 1471 | return ret; |
| 1472 | } |
| 1473 | |
| 1474 | ipoib_dbg(priv, "max_srq_sge=%d\n", attr.max_srq_sge); |
| 1475 | |
| 1476 | attr.max_srq_sge = min_t(int, IPOIB_CM_RX_SG, attr.max_srq_sge); |
| 1477 | ipoib_cm_create_srq(dev, attr.max_srq_sge); |
| 1478 | if (ipoib_cm_has_srq(dev)) { |
| 1479 | priv->cm.max_cm_mtu = attr.max_srq_sge * PAGE_SIZE - 0x10; |
| 1480 | priv->cm.num_frags = attr.max_srq_sge; |
| 1481 | ipoib_dbg(priv, "max_cm_mtu = 0x%x, num_frags=%d\n", |
| 1482 | priv->cm.max_cm_mtu, priv->cm.num_frags); |
| 1483 | } else { |
| 1484 | priv->cm.max_cm_mtu = IPOIB_CM_MTU; |
| 1485 | priv->cm.num_frags = IPOIB_CM_RX_SG; |
| 1486 | } |
| 1487 | |
| 1488 | for (i = 0; i < priv->cm.num_frags; ++i) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1489 | priv->cm.rx_sge[i].lkey = priv->mr->lkey; |
| 1490 | |
| 1491 | priv->cm.rx_sge[0].length = IPOIB_CM_HEAD_SIZE; |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1492 | for (i = 1; i < priv->cm.num_frags; ++i) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1493 | priv->cm.rx_sge[i].length = PAGE_SIZE; |
| 1494 | priv->cm.rx_wr.next = NULL; |
| 1495 | priv->cm.rx_wr.sg_list = priv->cm.rx_sge; |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1496 | priv->cm.rx_wr.num_sge = priv->cm.num_frags; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1497 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1498 | if (ipoib_cm_has_srq(dev)) { |
| 1499 | for (i = 0; i < ipoib_recvq_size; ++i) { |
| 1500 | if (!ipoib_cm_alloc_rx_skb(dev, priv->cm.srq_ring, i, |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1501 | priv->cm.num_frags - 1, |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1502 | priv->cm.srq_ring[i].mapping)) { |
| 1503 | ipoib_warn(priv, "failed to allocate " |
| 1504 | "receive buffer %d\n", i); |
| 1505 | ipoib_cm_dev_cleanup(dev); |
| 1506 | return -ENOMEM; |
| 1507 | } |
| 1508 | |
| 1509 | if (ipoib_cm_post_receive_srq(dev, i)) { |
| 1510 | ipoib_warn(priv, "ipoib_cm_post_receive_srq " |
| 1511 | "failed for buf %d\n", i); |
| 1512 | ipoib_cm_dev_cleanup(dev); |
| 1513 | return -EIO; |
| 1514 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1515 | } |
| 1516 | } |
| 1517 | |
| 1518 | priv->dev->dev_addr[0] = IPOIB_FLAGS_RC; |
| 1519 | return 0; |
| 1520 | } |
| 1521 | |
| 1522 | void ipoib_cm_dev_cleanup(struct net_device *dev) |
| 1523 | { |
| 1524 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1525 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1526 | |
| 1527 | if (!priv->cm.srq) |
| 1528 | return; |
| 1529 | |
| 1530 | ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); |
| 1531 | |
| 1532 | ret = ib_destroy_srq(priv->cm.srq); |
| 1533 | if (ret) |
| 1534 | ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); |
| 1535 | |
| 1536 | priv->cm.srq = NULL; |
| 1537 | if (!priv->cm.srq_ring) |
| 1538 | return; |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1539 | |
| 1540 | ipoib_cm_free_rx_ring(dev, priv->cm.srq_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1541 | priv->cm.srq_ring = NULL; |
| 1542 | } |