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> |
| 34 | #include <rdma/ib_cache.h> |
| 35 | #include <net/dst.h> |
| 36 | #include <net/icmp.h> |
| 37 | #include <linux/icmpv6.h> |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 38 | #include <linux/delay.h> |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 39 | #include <linux/vmalloc.h> |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 40 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 41 | #include "ipoib.h" |
| 42 | |
| 43 | int ipoib_max_conn_qp = 128; |
| 44 | |
| 45 | module_param_named(max_nonsrq_conn_qp, ipoib_max_conn_qp, int, 0444); |
| 46 | MODULE_PARM_DESC(max_nonsrq_conn_qp, |
| 47 | "Max number of connected-mode QPs per interface " |
| 48 | "(applied only if shared receive queue is not available)"); |
| 49 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 50 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA |
| 51 | static int data_debug_level; |
| 52 | |
| 53 | module_param_named(cm_data_debug_level, data_debug_level, int, 0644); |
| 54 | MODULE_PARM_DESC(cm_data_debug_level, |
| 55 | "Enable data path debug tracing for connected mode if > 0"); |
| 56 | #endif |
| 57 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 58 | #define IPOIB_CM_IETF_ID 0x1000000000000000ULL |
| 59 | |
| 60 | #define IPOIB_CM_RX_UPDATE_TIME (256 * HZ) |
| 61 | #define IPOIB_CM_RX_TIMEOUT (2 * 256 * HZ) |
| 62 | #define IPOIB_CM_RX_DELAY (3 * 256 * HZ) |
| 63 | #define IPOIB_CM_RX_UPDATE_MASK (0x3) |
| 64 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 65 | static struct ib_qp_attr ipoib_cm_err_attr = { |
| 66 | .qp_state = IB_QPS_ERR |
| 67 | }; |
| 68 | |
Roland Dreier | 09f60f8 | 2007-10-26 13:44:25 -0700 | [diff] [blame] | 69 | #define IPOIB_CM_RX_DRAIN_WRID 0xffffffff |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 70 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 71 | static struct ib_send_wr ipoib_cm_rx_drain_wr = { |
| 72 | .wr_id = IPOIB_CM_RX_DRAIN_WRID, |
| 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) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 87 | ib_dma_unmap_single(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); |
| 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, |
| 114 | struct ipoib_cm_rx *rx, int id) |
| 115 | { |
| 116 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 117 | struct ib_recv_wr *bad_wr; |
| 118 | int i, ret; |
| 119 | |
| 120 | priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
| 121 | |
| 122 | for (i = 0; i < IPOIB_CM_RX_SG; ++i) |
| 123 | priv->cm.rx_sge[i].addr = rx->rx_ring[id].mapping[i]; |
| 124 | |
| 125 | ret = ib_post_recv(rx->qp, &priv->cm.rx_wr, &bad_wr); |
| 126 | if (unlikely(ret)) { |
| 127 | ipoib_warn(priv, "post recv failed for buf %d (%d)\n", id, ret); |
| 128 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, |
| 129 | rx->rx_ring[id].mapping); |
| 130 | dev_kfree_skb_any(rx->rx_ring[id].skb); |
| 131 | rx->rx_ring[id].skb = NULL; |
| 132 | } |
| 133 | |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | static struct sk_buff *ipoib_cm_alloc_rx_skb(struct net_device *dev, |
| 138 | struct ipoib_cm_rx_buf *rx_ring, |
| 139 | int id, int frags, |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 140 | u64 mapping[IPOIB_CM_RX_SG]) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 141 | { |
| 142 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 143 | struct sk_buff *skb; |
| 144 | int i; |
| 145 | |
| 146 | skb = dev_alloc_skb(IPOIB_CM_HEAD_SIZE + 12); |
| 147 | if (unlikely(!skb)) |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 148 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 149 | |
| 150 | /* |
| 151 | * IPoIB adds a 4 byte header. So we need 12 more bytes to align the |
| 152 | * IP header to a multiple of 16. |
| 153 | */ |
| 154 | skb_reserve(skb, 12); |
| 155 | |
| 156 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, IPOIB_CM_HEAD_SIZE, |
| 157 | DMA_FROM_DEVICE); |
| 158 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) { |
| 159 | dev_kfree_skb_any(skb); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 160 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 161 | } |
| 162 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 163 | for (i = 0; i < frags; i++) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 164 | struct page *page = alloc_page(GFP_ATOMIC); |
| 165 | |
| 166 | if (!page) |
| 167 | goto partial_error; |
| 168 | skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE); |
| 169 | |
| 170 | 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] | 171 | 0, PAGE_SIZE, DMA_FROM_DEVICE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 172 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[i + 1]))) |
| 173 | goto partial_error; |
| 174 | } |
| 175 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 176 | rx_ring[id].skb = skb; |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 177 | return skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 178 | |
| 179 | partial_error: |
| 180 | |
| 181 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); |
| 182 | |
Ralph Campbell | 841adfc | 2007-06-29 11:37:56 -0700 | [diff] [blame] | 183 | for (; i > 0; --i) |
| 184 | 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] | 185 | |
Michael S. Tsirkin | 8a2e65f | 2007-02-16 00:16:13 +0200 | [diff] [blame] | 186 | dev_kfree_skb_any(skb); |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 187 | return NULL; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 188 | } |
| 189 | |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 190 | static void ipoib_cm_free_rx_ring(struct net_device *dev, |
| 191 | struct ipoib_cm_rx_buf *rx_ring) |
| 192 | { |
| 193 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 194 | int i; |
| 195 | |
| 196 | for (i = 0; i < ipoib_recvq_size; ++i) |
| 197 | if (rx_ring[i].skb) { |
| 198 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, |
| 199 | rx_ring[i].mapping); |
| 200 | dev_kfree_skb_any(rx_ring[i].skb); |
| 201 | } |
| 202 | |
| 203 | kfree(rx_ring); |
| 204 | } |
| 205 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 206 | 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] | 207 | { |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 208 | struct ib_send_wr *bad_wr; |
| 209 | struct ipoib_cm_rx *p; |
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 | /* 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] | 212 | * make sure we have at most 1 outstanding WR. */ |
| 213 | if (list_empty(&priv->cm.rx_flush_list) || |
| 214 | !list_empty(&priv->cm.rx_drain_list)) |
| 215 | return; |
| 216 | |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 217 | /* |
| 218 | * QPs on flush list are error state. This way, a "flush |
| 219 | * error" WC will be immediately generated for each WR we post. |
| 220 | */ |
| 221 | p = list_entry(priv->cm.rx_flush_list.next, typeof(*p), list); |
| 222 | if (ib_post_send(p->qp, &ipoib_cm_rx_drain_wr, &bad_wr)) |
| 223 | ipoib_warn(priv, "failed to post drain wr\n"); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 224 | |
| 225 | list_splice_init(&priv->cm.rx_flush_list, &priv->cm.rx_drain_list); |
| 226 | } |
| 227 | |
| 228 | static void ipoib_cm_rx_event_handler(struct ib_event *event, void *ctx) |
| 229 | { |
| 230 | struct ipoib_cm_rx *p = ctx; |
| 231 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 232 | unsigned long flags; |
| 233 | |
| 234 | if (event->event != IB_EVENT_QP_LAST_WQE_REACHED) |
| 235 | return; |
| 236 | |
| 237 | spin_lock_irqsave(&priv->lock, flags); |
| 238 | list_move(&p->list, &priv->cm.rx_flush_list); |
| 239 | p->state = IPOIB_CM_RX_FLUSH; |
| 240 | ipoib_cm_start_rx_drain(priv); |
| 241 | spin_unlock_irqrestore(&priv->lock, flags); |
| 242 | } |
| 243 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 244 | static struct ib_qp *ipoib_cm_create_rx_qp(struct net_device *dev, |
| 245 | struct ipoib_cm_rx *p) |
| 246 | { |
| 247 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 248 | struct ib_qp_init_attr attr = { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 249 | .event_handler = ipoib_cm_rx_event_handler, |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 250 | .send_cq = priv->recv_cq, /* For drain WR */ |
| 251 | .recv_cq = priv->recv_cq, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 252 | .srq = priv->cm.srq, |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 253 | .cap.max_send_wr = 1, /* For drain WR */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 254 | .cap.max_send_sge = 1, /* FIXME: 0 Seems not to work */ |
| 255 | .sq_sig_type = IB_SIGNAL_ALL_WR, |
| 256 | .qp_type = IB_QPT_RC, |
| 257 | .qp_context = p, |
| 258 | }; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 259 | |
| 260 | if (!ipoib_cm_has_srq(dev)) { |
| 261 | attr.cap.max_recv_wr = ipoib_recvq_size; |
| 262 | attr.cap.max_recv_sge = IPOIB_CM_RX_SG; |
| 263 | } |
| 264 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 265 | return ib_create_qp(priv->pd, &attr); |
| 266 | } |
| 267 | |
| 268 | static int ipoib_cm_modify_rx_qp(struct net_device *dev, |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 269 | struct ib_cm_id *cm_id, struct ib_qp *qp, |
| 270 | unsigned psn) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 271 | { |
| 272 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 273 | struct ib_qp_attr qp_attr; |
| 274 | int qp_attr_mask, ret; |
| 275 | |
| 276 | qp_attr.qp_state = IB_QPS_INIT; |
| 277 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 278 | if (ret) { |
| 279 | ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); |
| 280 | return ret; |
| 281 | } |
| 282 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 283 | if (ret) { |
| 284 | ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); |
| 285 | return ret; |
| 286 | } |
| 287 | qp_attr.qp_state = IB_QPS_RTR; |
| 288 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 289 | if (ret) { |
| 290 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); |
| 291 | return ret; |
| 292 | } |
| 293 | qp_attr.rq_psn = psn; |
| 294 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 295 | if (ret) { |
| 296 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); |
| 297 | return ret; |
| 298 | } |
Michael S. Tsirkin | ec56dc0 | 2007-05-28 14:37:27 +0300 | [diff] [blame] | 299 | |
| 300 | /* |
| 301 | * Current Mellanox HCA firmware won't generate completions |
| 302 | * with error for drain WRs unless the QP has been moved to |
| 303 | * RTS first. This work-around leaves a window where a QP has |
| 304 | * moved to error asynchronously, but this will eventually get |
| 305 | * fixed in firmware, so let's not error out if modify QP |
| 306 | * fails. |
| 307 | */ |
| 308 | qp_attr.qp_state = IB_QPS_RTS; |
| 309 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 310 | if (ret) { |
| 311 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); |
| 312 | return 0; |
| 313 | } |
| 314 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 315 | if (ret) { |
| 316 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); |
| 317 | return 0; |
| 318 | } |
| 319 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 320 | return 0; |
| 321 | } |
| 322 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 323 | static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_id, |
| 324 | struct ipoib_cm_rx *rx) |
| 325 | { |
| 326 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 327 | int ret; |
| 328 | int i; |
| 329 | |
| 330 | rx->rx_ring = kcalloc(ipoib_recvq_size, sizeof *rx->rx_ring, GFP_KERNEL); |
| 331 | if (!rx->rx_ring) |
| 332 | return -ENOMEM; |
| 333 | |
| 334 | spin_lock_irq(&priv->lock); |
| 335 | |
| 336 | if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) { |
| 337 | spin_unlock_irq(&priv->lock); |
| 338 | ib_send_cm_rej(cm_id, IB_CM_REJ_NO_QP, NULL, 0, NULL, 0); |
| 339 | ret = -EINVAL; |
| 340 | goto err_free; |
| 341 | } else |
| 342 | ++priv->cm.nonsrq_conn_qp; |
| 343 | |
| 344 | spin_unlock_irq(&priv->lock); |
| 345 | |
| 346 | for (i = 0; i < ipoib_recvq_size; ++i) { |
| 347 | if (!ipoib_cm_alloc_rx_skb(dev, rx->rx_ring, i, IPOIB_CM_RX_SG - 1, |
| 348 | rx->rx_ring[i].mapping)) { |
| 349 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
| 350 | ret = -ENOMEM; |
| 351 | goto err_count; |
| 352 | } |
| 353 | ret = ipoib_cm_post_receive_nonsrq(dev, rx, i); |
| 354 | if (ret) { |
| 355 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq " |
| 356 | "failed for buf %d\n", i); |
| 357 | ret = -EIO; |
| 358 | goto err_count; |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | rx->recv_count = ipoib_recvq_size; |
| 363 | |
| 364 | return 0; |
| 365 | |
| 366 | err_count: |
| 367 | spin_lock_irq(&priv->lock); |
| 368 | --priv->cm.nonsrq_conn_qp; |
| 369 | spin_unlock_irq(&priv->lock); |
| 370 | |
| 371 | err_free: |
| 372 | ipoib_cm_free_rx_ring(dev, rx->rx_ring); |
| 373 | |
| 374 | return ret; |
| 375 | } |
| 376 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 377 | static int ipoib_cm_send_rep(struct net_device *dev, struct ib_cm_id *cm_id, |
| 378 | struct ib_qp *qp, struct ib_cm_req_event_param *req, |
| 379 | unsigned psn) |
| 380 | { |
| 381 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 382 | struct ipoib_cm_data data = {}; |
| 383 | struct ib_cm_rep_param rep = {}; |
| 384 | |
| 385 | data.qpn = cpu_to_be32(priv->qp->qp_num); |
| 386 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); |
| 387 | |
| 388 | rep.private_data = &data; |
| 389 | rep.private_data_len = sizeof data; |
| 390 | rep.flow_control = 0; |
| 391 | rep.rnr_retry_count = req->rnr_retry_count; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 392 | rep.srq = ipoib_cm_has_srq(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 393 | rep.qp_num = qp->qp_num; |
| 394 | rep.starting_psn = psn; |
| 395 | return ib_send_cm_rep(cm_id, &rep); |
| 396 | } |
| 397 | |
| 398 | static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) |
| 399 | { |
| 400 | struct net_device *dev = cm_id->context; |
| 401 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 402 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 403 | unsigned psn; |
| 404 | int ret; |
| 405 | |
| 406 | ipoib_dbg(priv, "REQ arrived\n"); |
| 407 | p = kzalloc(sizeof *p, GFP_KERNEL); |
| 408 | if (!p) |
| 409 | return -ENOMEM; |
| 410 | p->dev = dev; |
| 411 | p->id = cm_id; |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 412 | cm_id->context = p; |
| 413 | p->state = IPOIB_CM_RX_LIVE; |
| 414 | p->jiffies = jiffies; |
| 415 | INIT_LIST_HEAD(&p->list); |
| 416 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 417 | p->qp = ipoib_cm_create_rx_qp(dev, p); |
| 418 | if (IS_ERR(p->qp)) { |
| 419 | ret = PTR_ERR(p->qp); |
| 420 | goto err_qp; |
| 421 | } |
| 422 | |
| 423 | psn = random32() & 0xffffff; |
| 424 | ret = ipoib_cm_modify_rx_qp(dev, cm_id, p->qp, psn); |
| 425 | if (ret) |
| 426 | goto err_modify; |
| 427 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 428 | if (!ipoib_cm_has_srq(dev)) { |
| 429 | ret = ipoib_cm_nonsrq_init_rx(dev, cm_id, p); |
| 430 | if (ret) |
| 431 | goto err_modify; |
| 432 | } |
| 433 | |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 434 | spin_lock_irq(&priv->lock); |
| 435 | queue_delayed_work(ipoib_workqueue, |
| 436 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
| 437 | /* Add this entry to passive ids list head, but do not re-add it |
| 438 | * if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */ |
| 439 | p->jiffies = jiffies; |
| 440 | if (p->state == IPOIB_CM_RX_LIVE) |
| 441 | list_move(&p->list, &priv->cm.passive_ids); |
| 442 | spin_unlock_irq(&priv->lock); |
| 443 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 444 | ret = ipoib_cm_send_rep(dev, cm_id, p->qp, &event->param.req_rcvd, psn); |
| 445 | if (ret) { |
| 446 | ipoib_warn(priv, "failed to send REP: %d\n", ret); |
Michael S. Tsirkin | 3ec7393 | 2007-06-19 13:40:41 +0300 | [diff] [blame] | 447 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
| 448 | ipoib_warn(priv, "unable to move qp to error state\n"); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 449 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 450 | return 0; |
| 451 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 452 | err_modify: |
| 453 | ib_destroy_qp(p->qp); |
| 454 | err_qp: |
| 455 | kfree(p); |
| 456 | return ret; |
| 457 | } |
| 458 | |
| 459 | static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, |
| 460 | struct ib_cm_event *event) |
| 461 | { |
| 462 | struct ipoib_cm_rx *p; |
| 463 | struct ipoib_dev_priv *priv; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 464 | |
| 465 | switch (event->event) { |
| 466 | case IB_CM_REQ_RECEIVED: |
| 467 | return ipoib_cm_req_handler(cm_id, event); |
| 468 | case IB_CM_DREQ_RECEIVED: |
| 469 | p = cm_id->context; |
| 470 | ib_send_cm_drep(cm_id, NULL, 0); |
| 471 | /* Fall through */ |
| 472 | case IB_CM_REJ_RECEIVED: |
| 473 | p = cm_id->context; |
| 474 | priv = netdev_priv(p->dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 475 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
| 476 | ipoib_warn(priv, "unable to move qp to error state\n"); |
| 477 | /* Fall through */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 478 | default: |
| 479 | return 0; |
| 480 | } |
| 481 | } |
| 482 | /* Adjust length of skb with fragments to match received data */ |
| 483 | 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] | 484 | unsigned int length, struct sk_buff *toskb) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 485 | { |
| 486 | int i, num_frags; |
| 487 | unsigned int size; |
| 488 | |
| 489 | /* put header into skb */ |
| 490 | size = min(length, hdr_space); |
| 491 | skb->tail += size; |
| 492 | skb->len += size; |
| 493 | length -= size; |
| 494 | |
| 495 | num_frags = skb_shinfo(skb)->nr_frags; |
| 496 | for (i = 0; i < num_frags; i++) { |
| 497 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 498 | |
| 499 | if (length == 0) { |
| 500 | /* don't need this page */ |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 501 | skb_fill_page_desc(toskb, i, frag->page, 0, PAGE_SIZE); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 502 | --skb_shinfo(skb)->nr_frags; |
| 503 | } else { |
| 504 | size = min(length, (unsigned) PAGE_SIZE); |
| 505 | |
| 506 | frag->size = size; |
| 507 | skb->data_len += size; |
| 508 | skb->truesize += size; |
| 509 | skb->len += size; |
| 510 | length -= size; |
| 511 | } |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
| 516 | { |
| 517 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 518 | struct ipoib_cm_rx_buf *rx_ring; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 519 | 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] | 520 | struct sk_buff *skb, *newskb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 521 | struct ipoib_cm_rx *p; |
| 522 | unsigned long flags; |
| 523 | u64 mapping[IPOIB_CM_RX_SG]; |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 524 | int frags; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 525 | int has_srq; |
Eli Cohen | f89271da | 2008-07-14 23:48:44 -0700 | [diff] [blame^] | 526 | struct sk_buff *small_skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 527 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 528 | ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n", |
| 529 | wr_id, wc->status); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 530 | |
| 531 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 532 | 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] | 533 | spin_lock_irqsave(&priv->lock, flags); |
| 534 | list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list); |
| 535 | ipoib_cm_start_rx_drain(priv); |
| 536 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); |
| 537 | spin_unlock_irqrestore(&priv->lock, flags); |
| 538 | } else |
| 539 | ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", |
| 540 | wr_id, ipoib_recvq_size); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 541 | return; |
| 542 | } |
| 543 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 544 | p = wc->qp->qp_context; |
| 545 | |
| 546 | has_srq = ipoib_cm_has_srq(dev); |
| 547 | rx_ring = has_srq ? priv->cm.srq_ring : p->rx_ring; |
| 548 | |
| 549 | skb = rx_ring[wr_id].skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 550 | |
| 551 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
| 552 | ipoib_dbg(priv, "cm recv error " |
| 553 | "(status=%d, wrid=%d vend_err %x)\n", |
| 554 | wc->status, wr_id, wc->vendor_err); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 555 | ++dev->stats.rx_dropped; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 556 | if (has_srq) |
| 557 | goto repost; |
| 558 | else { |
| 559 | if (!--p->recv_count) { |
| 560 | spin_lock_irqsave(&priv->lock, flags); |
| 561 | list_move(&p->list, &priv->cm.rx_reap_list); |
| 562 | spin_unlock_irqrestore(&priv->lock, flags); |
| 563 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); |
| 564 | } |
| 565 | return; |
| 566 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 567 | } |
| 568 | |
Roland Dreier | fd31256 | 2007-10-17 21:54:44 -0700 | [diff] [blame] | 569 | if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) { |
Michael S. Tsirkin | d6ef7d6 | 2007-05-02 15:31:12 +0300 | [diff] [blame] | 570 | 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] | 571 | spin_lock_irqsave(&priv->lock, flags); |
| 572 | p->jiffies = jiffies; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 573 | /* Move this entry to list head, but do not re-add it |
| 574 | * if it has been moved out of list. */ |
| 575 | if (p->state == IPOIB_CM_RX_LIVE) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 576 | list_move(&p->list, &priv->cm.passive_ids); |
| 577 | spin_unlock_irqrestore(&priv->lock, flags); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 578 | } |
| 579 | } |
| 580 | |
Eli Cohen | f89271da | 2008-07-14 23:48:44 -0700 | [diff] [blame^] | 581 | if (wc->byte_len < IPOIB_CM_COPYBREAK) { |
| 582 | int dlen = wc->byte_len; |
| 583 | |
| 584 | small_skb = dev_alloc_skb(dlen + 12); |
| 585 | if (small_skb) { |
| 586 | skb_reserve(small_skb, 12); |
| 587 | ib_dma_sync_single_for_cpu(priv->ca, rx_ring[wr_id].mapping[0], |
| 588 | dlen, DMA_FROM_DEVICE); |
| 589 | skb_copy_from_linear_data(skb, small_skb->data, dlen); |
| 590 | ib_dma_sync_single_for_device(priv->ca, rx_ring[wr_id].mapping[0], |
| 591 | dlen, DMA_FROM_DEVICE); |
| 592 | skb_put(small_skb, dlen); |
| 593 | skb = small_skb; |
| 594 | goto copied; |
| 595 | } |
| 596 | } |
| 597 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 598 | frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len, |
| 599 | (unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE; |
| 600 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 601 | 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] | 602 | if (unlikely(!newskb)) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 603 | /* |
| 604 | * If we can't allocate a new RX buffer, dump |
| 605 | * this packet and reuse the old buffer. |
| 606 | */ |
| 607 | ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 608 | ++dev->stats.rx_dropped; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 609 | goto repost; |
| 610 | } |
| 611 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 612 | ipoib_cm_dma_unmap_rx(priv, frags, rx_ring[wr_id].mapping); |
| 613 | memcpy(rx_ring[wr_id].mapping, mapping, (frags + 1) * sizeof *mapping); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 614 | |
| 615 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", |
| 616 | wc->byte_len, wc->slid); |
| 617 | |
Michael S. Tsirkin | 1812063 | 2007-02-20 20:17:55 +0200 | [diff] [blame] | 618 | 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] | 619 | |
Eli Cohen | f89271da | 2008-07-14 23:48:44 -0700 | [diff] [blame^] | 620 | copied: |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 621 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 622 | skb_reset_mac_header(skb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 623 | skb_pull(skb, IPOIB_ENCAP_LEN); |
| 624 | |
| 625 | dev->last_rx = jiffies; |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 626 | ++dev->stats.rx_packets; |
| 627 | dev->stats.rx_bytes += skb->len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 628 | |
| 629 | skb->dev = dev; |
| 630 | /* XXX get correct PACKET_ type here */ |
| 631 | skb->pkt_type = PACKET_HOST; |
Roland Dreier | 8d1cc86 | 2007-05-06 21:05:32 -0700 | [diff] [blame] | 632 | netif_receive_skb(skb); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 633 | |
| 634 | repost: |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 635 | if (has_srq) { |
| 636 | if (unlikely(ipoib_cm_post_receive_srq(dev, wr_id))) |
| 637 | ipoib_warn(priv, "ipoib_cm_post_receive_srq failed " |
| 638 | "for buf %d\n", wr_id); |
| 639 | } else { |
| 640 | if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p, wr_id))) { |
| 641 | --p->recv_count; |
| 642 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed " |
| 643 | "for buf %d\n", wr_id); |
| 644 | } |
| 645 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | static inline int post_send(struct ipoib_dev_priv *priv, |
| 649 | struct ipoib_cm_tx *tx, |
| 650 | unsigned int wr_id, |
| 651 | u64 addr, int len) |
| 652 | { |
| 653 | struct ib_send_wr *bad_wr; |
| 654 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 655 | priv->tx_sge[0].addr = addr; |
| 656 | priv->tx_sge[0].length = len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 657 | |
Roland Dreier | 4200406 | 2008-03-11 18:35:20 -0700 | [diff] [blame] | 658 | priv->tx_wr.num_sge = 1; |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 659 | priv->tx_wr.wr_id = wr_id | IPOIB_OP_CM; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 660 | |
| 661 | return ib_post_send(tx->qp, &priv->tx_wr, &bad_wr); |
| 662 | } |
| 663 | |
| 664 | void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx) |
| 665 | { |
| 666 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 667 | struct ipoib_tx_buf *tx_req; |
| 668 | u64 addr; |
| 669 | |
| 670 | if (unlikely(skb->len > tx->mtu)) { |
| 671 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", |
| 672 | skb->len, tx->mtu); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 673 | ++dev->stats.tx_dropped; |
| 674 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 77d8e1e | 2007-03-21 15:45:05 +0200 | [diff] [blame] | 675 | 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] | 676 | return; |
| 677 | } |
| 678 | |
| 679 | ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", |
| 680 | tx->tx_head, skb->len, tx->qp->qp_num); |
| 681 | |
| 682 | /* |
| 683 | * We put the skb into the tx_ring _before_ we call post_send() |
| 684 | * because it's entirely possible that the completion handler will |
| 685 | * run before we execute anything after the post_send(). That |
| 686 | * means we have to make sure everything is properly recorded and |
| 687 | * our state is consistent before we call post_send(). |
| 688 | */ |
| 689 | tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; |
| 690 | tx_req->skb = skb; |
| 691 | addr = ib_dma_map_single(priv->ca, skb->data, skb->len, DMA_TO_DEVICE); |
| 692 | if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 693 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 694 | dev_kfree_skb_any(skb); |
| 695 | return; |
| 696 | } |
| 697 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 698 | tx_req->mapping[0] = addr; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 699 | |
| 700 | 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] | 701 | addr, skb->len))) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 702 | ipoib_warn(priv, "post_send failed\n"); |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 703 | ++dev->stats.tx_errors; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 704 | ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE); |
| 705 | dev_kfree_skb_any(skb); |
| 706 | } else { |
| 707 | dev->trans_start = jiffies; |
| 708 | ++tx->tx_head; |
| 709 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 710 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 711 | ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", |
| 712 | tx->qp->qp_num); |
| 713 | netif_stop_queue(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 714 | } |
| 715 | } |
| 716 | } |
| 717 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 718 | 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] | 719 | { |
| 720 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 721 | struct ipoib_cm_tx *tx = wc->qp->qp_context; |
| 722 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 723 | struct ipoib_tx_buf *tx_req; |
| 724 | unsigned long flags; |
| 725 | |
Roland Dreier | a89875f | 2007-04-18 20:20:53 -0700 | [diff] [blame] | 726 | ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", |
| 727 | wr_id, wc->status); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 728 | |
| 729 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
| 730 | ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", |
| 731 | wr_id, ipoib_sendq_size); |
| 732 | return; |
| 733 | } |
| 734 | |
| 735 | tx_req = &tx->tx_ring[wr_id]; |
| 736 | |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 737 | 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] | 738 | |
| 739 | /* FIXME: is this right? Shouldn't we only increment on success? */ |
Roland Dreier | de90351 | 2007-09-28 15:33:51 -0700 | [diff] [blame] | 740 | ++dev->stats.tx_packets; |
| 741 | dev->stats.tx_bytes += tx_req->skb->len; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 742 | |
| 743 | dev_kfree_skb_any(tx_req->skb); |
| 744 | |
| 745 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 746 | ++tx->tx_tail; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 747 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
| 748 | netif_queue_stopped(dev) && |
| 749 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 750 | netif_wake_queue(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 751 | |
| 752 | if (wc->status != IB_WC_SUCCESS && |
| 753 | wc->status != IB_WC_WR_FLUSH_ERR) { |
| 754 | struct ipoib_neigh *neigh; |
| 755 | |
| 756 | ipoib_dbg(priv, "failed cm send event " |
| 757 | "(status=%d, wrid=%d vend_err %x)\n", |
| 758 | wc->status, wr_id, wc->vendor_err); |
| 759 | |
| 760 | spin_lock(&priv->lock); |
| 761 | neigh = tx->neigh; |
| 762 | |
| 763 | if (neigh) { |
| 764 | neigh->cm = NULL; |
| 765 | list_del(&neigh->list); |
| 766 | if (neigh->ah) |
| 767 | ipoib_put_ah(neigh->ah); |
| 768 | ipoib_neigh_free(dev, neigh); |
| 769 | |
| 770 | tx->neigh = NULL; |
| 771 | } |
| 772 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 773 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 774 | list_move(&tx->list, &priv->cm.reap_list); |
| 775 | queue_work(ipoib_workqueue, &priv->cm.reap_task); |
| 776 | } |
| 777 | |
| 778 | clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); |
| 779 | |
| 780 | spin_unlock(&priv->lock); |
| 781 | } |
| 782 | |
| 783 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 784 | } |
| 785 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 786 | int ipoib_cm_dev_open(struct net_device *dev) |
| 787 | { |
| 788 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 789 | int ret; |
| 790 | |
| 791 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) |
| 792 | return 0; |
| 793 | |
| 794 | priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); |
| 795 | if (IS_ERR(priv->cm.id)) { |
| 796 | 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] | 797 | ret = PTR_ERR(priv->cm.id); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 798 | goto err_cm; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), |
| 802 | 0, NULL); |
| 803 | if (ret) { |
| 804 | printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, |
| 805 | IPOIB_CM_IETF_ID | priv->qp->qp_num); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 806 | goto err_listen; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 807 | } |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 808 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 809 | return 0; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 810 | |
| 811 | err_listen: |
| 812 | ib_destroy_cm_id(priv->cm.id); |
| 813 | err_cm: |
| 814 | priv->cm.id = NULL; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 815 | return ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 816 | } |
| 817 | |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 818 | static void ipoib_cm_free_rx_reap_list(struct net_device *dev) |
| 819 | { |
| 820 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 821 | struct ipoib_cm_rx *rx, *n; |
| 822 | LIST_HEAD(list); |
| 823 | |
| 824 | spin_lock_irq(&priv->lock); |
| 825 | list_splice_init(&priv->cm.rx_reap_list, &list); |
| 826 | spin_unlock_irq(&priv->lock); |
| 827 | |
| 828 | list_for_each_entry_safe(rx, n, &list, list) { |
| 829 | ib_destroy_cm_id(rx->id); |
| 830 | ib_destroy_qp(rx->qp); |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 831 | if (!ipoib_cm_has_srq(dev)) { |
| 832 | ipoib_cm_free_rx_ring(priv->dev, rx->rx_ring); |
| 833 | spin_lock_irq(&priv->lock); |
| 834 | --priv->cm.nonsrq_conn_qp; |
| 835 | spin_unlock_irq(&priv->lock); |
| 836 | } |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 837 | kfree(rx); |
| 838 | } |
| 839 | } |
| 840 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 841 | void ipoib_cm_dev_stop(struct net_device *dev) |
| 842 | { |
| 843 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 844 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 845 | unsigned long begin; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 846 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 847 | |
Michael S. Tsirkin | 347fcfb | 2007-04-30 17:30:28 -0700 | [diff] [blame] | 848 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr) || !priv->cm.id) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 849 | return; |
| 850 | |
| 851 | ib_destroy_cm_id(priv->cm.id); |
Michael S. Tsirkin | 347fcfb | 2007-04-30 17:30:28 -0700 | [diff] [blame] | 852 | priv->cm.id = NULL; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 853 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 854 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 855 | while (!list_empty(&priv->cm.passive_ids)) { |
| 856 | p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 857 | list_move(&p->list, &priv->cm.rx_error_list); |
| 858 | p->state = IPOIB_CM_RX_ERROR; |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 859 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 860 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
| 861 | if (ret) |
| 862 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); |
| 863 | spin_lock_irq(&priv->lock); |
| 864 | } |
| 865 | |
| 866 | /* Wait for all RX to be drained */ |
| 867 | begin = jiffies; |
| 868 | |
| 869 | while (!list_empty(&priv->cm.rx_error_list) || |
| 870 | !list_empty(&priv->cm.rx_flush_list) || |
| 871 | !list_empty(&priv->cm.rx_drain_list)) { |
Michael S. Tsirkin | 8fd357a | 2007-05-24 14:02:39 -0700 | [diff] [blame] | 872 | if (time_after(jiffies, begin + 5 * HZ)) { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 873 | ipoib_warn(priv, "RX drain timing out\n"); |
| 874 | |
| 875 | /* |
| 876 | * assume the HW is wedged and just free up everything. |
| 877 | */ |
Pradeep Satyanarayana | ec229e5 | 2008-02-12 15:00:59 -0800 | [diff] [blame] | 878 | list_splice_init(&priv->cm.rx_flush_list, |
| 879 | &priv->cm.rx_reap_list); |
| 880 | list_splice_init(&priv->cm.rx_error_list, |
| 881 | &priv->cm.rx_reap_list); |
| 882 | list_splice_init(&priv->cm.rx_drain_list, |
| 883 | &priv->cm.rx_reap_list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 884 | break; |
| 885 | } |
| 886 | spin_unlock_irq(&priv->lock); |
| 887 | msleep(1); |
Michael S. Tsirkin | 2dfbfc3 | 2007-05-24 18:32:46 +0300 | [diff] [blame] | 888 | ipoib_drain_cq(dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 889 | spin_lock_irq(&priv->lock); |
| 890 | } |
| 891 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 892 | spin_unlock_irq(&priv->lock); |
| 893 | |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 894 | ipoib_cm_free_rx_reap_list(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 895 | |
| 896 | cancel_delayed_work(&priv->cm.stale_task); |
| 897 | } |
| 898 | |
| 899 | static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) |
| 900 | { |
| 901 | struct ipoib_cm_tx *p = cm_id->context; |
| 902 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 903 | struct ipoib_cm_data *data = event->private_data; |
| 904 | struct sk_buff_head skqueue; |
| 905 | struct ib_qp_attr qp_attr; |
| 906 | int qp_attr_mask, ret; |
| 907 | struct sk_buff *skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 908 | |
| 909 | p->mtu = be32_to_cpu(data->mtu); |
| 910 | |
Michael S. Tsirkin | 82c3aca | 2007-06-20 19:22:15 +0300 | [diff] [blame] | 911 | if (p->mtu <= IPOIB_ENCAP_LEN) { |
| 912 | ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n", |
| 913 | p->mtu, IPOIB_ENCAP_LEN); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 914 | return -EINVAL; |
| 915 | } |
| 916 | |
| 917 | qp_attr.qp_state = IB_QPS_RTR; |
| 918 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 919 | if (ret) { |
| 920 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); |
| 921 | return ret; |
| 922 | } |
| 923 | |
| 924 | qp_attr.rq_psn = 0 /* FIXME */; |
| 925 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); |
| 926 | if (ret) { |
| 927 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); |
| 928 | return ret; |
| 929 | } |
| 930 | |
| 931 | qp_attr.qp_state = IB_QPS_RTS; |
| 932 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); |
| 933 | if (ret) { |
| 934 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); |
| 935 | return ret; |
| 936 | } |
| 937 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); |
| 938 | if (ret) { |
| 939 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); |
| 940 | return ret; |
| 941 | } |
| 942 | |
| 943 | skb_queue_head_init(&skqueue); |
| 944 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 945 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 946 | set_bit(IPOIB_FLAG_OPER_UP, &p->flags); |
| 947 | if (p->neigh) |
| 948 | while ((skb = __skb_dequeue(&p->neigh->queue))) |
| 949 | __skb_queue_tail(&skqueue, skb); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 950 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 951 | |
| 952 | while ((skb = __skb_dequeue(&skqueue))) { |
| 953 | skb->dev = p->dev; |
| 954 | if (dev_queue_xmit(skb)) |
| 955 | ipoib_warn(priv, "dev_queue_xmit failed " |
| 956 | "to requeue packet\n"); |
| 957 | } |
| 958 | |
| 959 | ret = ib_send_cm_rtu(cm_id, NULL, 0); |
| 960 | if (ret) { |
| 961 | ipoib_warn(priv, "failed to send RTU: %d\n", ret); |
| 962 | return ret; |
| 963 | } |
| 964 | return 0; |
| 965 | } |
| 966 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 967 | 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] | 968 | { |
| 969 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 970 | struct ib_qp_init_attr attr = { |
Eli Cohen | f56bcd8 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 971 | .send_cq = priv->recv_cq, |
| 972 | .recv_cq = priv->recv_cq, |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 973 | .srq = priv->cm.srq, |
| 974 | .cap.max_send_wr = ipoib_sendq_size, |
| 975 | .cap.max_send_sge = 1, |
| 976 | .sq_sig_type = IB_SIGNAL_ALL_WR, |
| 977 | .qp_type = IB_QPT_RC, |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 978 | .qp_context = tx |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 979 | }; |
Dotan Barak | ede6bc0 | 2007-10-07 09:30:48 +0200 | [diff] [blame] | 980 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 981 | return ib_create_qp(priv->pd, &attr); |
| 982 | } |
| 983 | |
| 984 | static int ipoib_cm_send_req(struct net_device *dev, |
| 985 | struct ib_cm_id *id, struct ib_qp *qp, |
| 986 | u32 qpn, |
| 987 | struct ib_sa_path_rec *pathrec) |
| 988 | { |
| 989 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 990 | struct ipoib_cm_data data = {}; |
| 991 | struct ib_cm_req_param req = {}; |
| 992 | |
| 993 | data.qpn = cpu_to_be32(priv->qp->qp_num); |
| 994 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); |
| 995 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 996 | req.primary_path = pathrec; |
| 997 | req.alternate_path = NULL; |
| 998 | req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); |
| 999 | req.qp_num = qp->qp_num; |
| 1000 | req.qp_type = qp->qp_type; |
| 1001 | req.private_data = &data; |
| 1002 | req.private_data_len = sizeof data; |
| 1003 | req.flow_control = 0; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1004 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1005 | req.starting_psn = 0; /* FIXME */ |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1006 | |
| 1007 | /* |
| 1008 | * Pick some arbitrary defaults here; we could make these |
| 1009 | * module parameters if anyone cared about setting them. |
| 1010 | */ |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1011 | req.responder_resources = 4; |
| 1012 | req.remote_cm_response_timeout = 20; |
| 1013 | req.local_cm_response_timeout = 20; |
| 1014 | req.retry_count = 0; /* RFC draft warns against retries */ |
| 1015 | req.rnr_retry_count = 0; /* RFC draft warns against retries */ |
| 1016 | req.max_cm_retries = 15; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1017 | req.srq = ipoib_cm_has_srq(dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1018 | return ib_send_cm_req(id, &req); |
| 1019 | } |
| 1020 | |
| 1021 | static int ipoib_cm_modify_tx_init(struct net_device *dev, |
| 1022 | struct ib_cm_id *cm_id, struct ib_qp *qp) |
| 1023 | { |
| 1024 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1025 | struct ib_qp_attr qp_attr; |
| 1026 | int qp_attr_mask, ret; |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 1027 | 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] | 1028 | if (ret) { |
Roland Dreier | 9fdd5e5 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 1029 | 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] | 1030 | return ret; |
| 1031 | } |
| 1032 | |
| 1033 | qp_attr.qp_state = IB_QPS_INIT; |
| 1034 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; |
| 1035 | qp_attr.port_num = priv->port; |
| 1036 | qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; |
| 1037 | |
| 1038 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 1039 | if (ret) { |
| 1040 | ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); |
| 1041 | return ret; |
| 1042 | } |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, |
| 1047 | struct ib_sa_path_rec *pathrec) |
| 1048 | { |
| 1049 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 1050 | int ret; |
| 1051 | |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1052 | p->tx_ring = vmalloc(ipoib_sendq_size * sizeof *p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1053 | if (!p->tx_ring) { |
| 1054 | ipoib_warn(priv, "failed to allocate tx ring\n"); |
| 1055 | ret = -ENOMEM; |
| 1056 | goto err_tx; |
| 1057 | } |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1058 | 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] | 1059 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1060 | p->qp = ipoib_cm_create_tx_qp(p->dev, p); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1061 | if (IS_ERR(p->qp)) { |
| 1062 | ret = PTR_ERR(p->qp); |
| 1063 | ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); |
| 1064 | goto err_qp; |
| 1065 | } |
| 1066 | |
| 1067 | p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); |
| 1068 | if (IS_ERR(p->id)) { |
| 1069 | ret = PTR_ERR(p->id); |
| 1070 | ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); |
| 1071 | goto err_id; |
| 1072 | } |
| 1073 | |
| 1074 | ret = ipoib_cm_modify_tx_init(p->dev, p->id, p->qp); |
| 1075 | if (ret) { |
| 1076 | ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); |
| 1077 | goto err_modify; |
| 1078 | } |
| 1079 | |
| 1080 | ret = ipoib_cm_send_req(p->dev, p->id, p->qp, qpn, pathrec); |
| 1081 | if (ret) { |
| 1082 | ipoib_warn(priv, "failed to send cm req: %d\n", ret); |
| 1083 | goto err_send_cm; |
| 1084 | } |
| 1085 | |
| 1086 | ipoib_dbg(priv, "Request connection 0x%x for gid " IPOIB_GID_FMT " qpn 0x%x\n", |
| 1087 | p->qp->qp_num, IPOIB_GID_ARG(pathrec->dgid), qpn); |
| 1088 | |
| 1089 | return 0; |
| 1090 | |
| 1091 | err_send_cm: |
| 1092 | err_modify: |
| 1093 | ib_destroy_cm_id(p->id); |
| 1094 | err_id: |
| 1095 | p->id = NULL; |
| 1096 | ib_destroy_qp(p->qp); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1097 | err_qp: |
| 1098 | p->qp = NULL; |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1099 | vfree(p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1100 | err_tx: |
| 1101 | return ret; |
| 1102 | } |
| 1103 | |
| 1104 | static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) |
| 1105 | { |
| 1106 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); |
| 1107 | struct ipoib_tx_buf *tx_req; |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1108 | unsigned long flags; |
| 1109 | unsigned long begin; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1110 | |
| 1111 | ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", |
| 1112 | p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); |
| 1113 | |
| 1114 | if (p->id) |
| 1115 | ib_destroy_cm_id(p->id); |
| 1116 | |
Michael S. Tsirkin | 1b52496 | 2007-08-16 15:36:16 +0300 | [diff] [blame] | 1117 | if (p->tx_ring) { |
| 1118 | /* Wait for all sends to complete */ |
| 1119 | begin = jiffies; |
| 1120 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
| 1121 | if (time_after(jiffies, begin + 5 * HZ)) { |
| 1122 | ipoib_warn(priv, "timing out; %d sends not completed\n", |
| 1123 | p->tx_head - p->tx_tail); |
| 1124 | goto timeout; |
| 1125 | } |
| 1126 | |
| 1127 | msleep(1); |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | timeout: |
| 1132 | |
| 1133 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
| 1134 | tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; |
Eli Cohen | 7143740 | 2008-01-30 18:30:53 +0200 | [diff] [blame] | 1135 | 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] | 1136 | DMA_TO_DEVICE); |
| 1137 | dev_kfree_skb_any(tx_req->skb); |
| 1138 | ++p->tx_tail; |
| 1139 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 1140 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
| 1141 | netif_queue_stopped(p->dev) && |
| 1142 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
| 1143 | netif_wake_queue(p->dev); |
| 1144 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 1145 | } |
| 1146 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1147 | if (p->qp) |
| 1148 | ib_destroy_qp(p->qp); |
| 1149 | |
Roland Dreier | 10313cb | 2008-03-12 07:51:03 -0700 | [diff] [blame] | 1150 | vfree(p->tx_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1151 | kfree(p); |
| 1152 | } |
| 1153 | |
| 1154 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
| 1155 | struct ib_cm_event *event) |
| 1156 | { |
| 1157 | struct ipoib_cm_tx *tx = cm_id->context; |
| 1158 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); |
| 1159 | struct net_device *dev = priv->dev; |
| 1160 | struct ipoib_neigh *neigh; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1161 | int ret; |
| 1162 | |
| 1163 | switch (event->event) { |
| 1164 | case IB_CM_DREQ_RECEIVED: |
| 1165 | ipoib_dbg(priv, "DREQ received.\n"); |
| 1166 | ib_send_cm_drep(cm_id, NULL, 0); |
| 1167 | break; |
| 1168 | case IB_CM_REP_RECEIVED: |
| 1169 | ipoib_dbg(priv, "REP received.\n"); |
| 1170 | ret = ipoib_cm_rep_handler(cm_id, event); |
| 1171 | if (ret) |
| 1172 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| 1173 | NULL, 0, NULL, 0); |
| 1174 | break; |
| 1175 | case IB_CM_REQ_ERROR: |
| 1176 | case IB_CM_REJ_RECEIVED: |
| 1177 | case IB_CM_TIMEWAIT_EXIT: |
| 1178 | ipoib_dbg(priv, "CM error %d.\n", event->event); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1179 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1180 | spin_lock(&priv->lock); |
| 1181 | neigh = tx->neigh; |
| 1182 | |
| 1183 | if (neigh) { |
| 1184 | neigh->cm = NULL; |
| 1185 | list_del(&neigh->list); |
| 1186 | if (neigh->ah) |
| 1187 | ipoib_put_ah(neigh->ah); |
| 1188 | ipoib_neigh_free(dev, neigh); |
| 1189 | |
| 1190 | tx->neigh = NULL; |
| 1191 | } |
| 1192 | |
| 1193 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 1194 | list_move(&tx->list, &priv->cm.reap_list); |
| 1195 | queue_work(ipoib_workqueue, &priv->cm.reap_task); |
| 1196 | } |
| 1197 | |
| 1198 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1199 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1200 | break; |
| 1201 | default: |
| 1202 | break; |
| 1203 | } |
| 1204 | |
| 1205 | return 0; |
| 1206 | } |
| 1207 | |
| 1208 | struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path, |
| 1209 | struct ipoib_neigh *neigh) |
| 1210 | { |
| 1211 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1212 | struct ipoib_cm_tx *tx; |
| 1213 | |
| 1214 | tx = kzalloc(sizeof *tx, GFP_ATOMIC); |
| 1215 | if (!tx) |
| 1216 | return NULL; |
| 1217 | |
| 1218 | neigh->cm = tx; |
| 1219 | tx->neigh = neigh; |
| 1220 | tx->path = path; |
| 1221 | tx->dev = dev; |
| 1222 | list_add(&tx->list, &priv->cm.start_list); |
| 1223 | set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); |
| 1224 | queue_work(ipoib_workqueue, &priv->cm.start_task); |
| 1225 | return tx; |
| 1226 | } |
| 1227 | |
| 1228 | void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) |
| 1229 | { |
| 1230 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); |
| 1231 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
| 1232 | list_move(&tx->list, &priv->cm.reap_list); |
| 1233 | queue_work(ipoib_workqueue, &priv->cm.reap_task); |
| 1234 | ipoib_dbg(priv, "Reap connection for gid " IPOIB_GID_FMT "\n", |
| 1235 | IPOIB_GID_ARG(tx->neigh->dgid)); |
| 1236 | tx->neigh = NULL; |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | static void ipoib_cm_tx_start(struct work_struct *work) |
| 1241 | { |
| 1242 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1243 | cm.start_task); |
| 1244 | struct net_device *dev = priv->dev; |
| 1245 | struct ipoib_neigh *neigh; |
| 1246 | struct ipoib_cm_tx *p; |
| 1247 | unsigned long flags; |
| 1248 | int ret; |
| 1249 | |
| 1250 | struct ib_sa_path_rec pathrec; |
| 1251 | u32 qpn; |
| 1252 | |
| 1253 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 1254 | spin_lock(&priv->lock); |
| 1255 | while (!list_empty(&priv->cm.start_list)) { |
| 1256 | p = list_entry(priv->cm.start_list.next, typeof(*p), list); |
| 1257 | list_del_init(&p->list); |
| 1258 | neigh = p->neigh; |
| 1259 | qpn = IPOIB_QPN(neigh->neighbour->ha); |
| 1260 | memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); |
| 1261 | spin_unlock(&priv->lock); |
| 1262 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 1263 | ret = ipoib_cm_tx_init(p, qpn, &pathrec); |
| 1264 | spin_lock_irqsave(&priv->tx_lock, flags); |
| 1265 | spin_lock(&priv->lock); |
| 1266 | if (ret) { |
| 1267 | neigh = p->neigh; |
| 1268 | if (neigh) { |
| 1269 | neigh->cm = NULL; |
| 1270 | list_del(&neigh->list); |
| 1271 | if (neigh->ah) |
| 1272 | ipoib_put_ah(neigh->ah); |
| 1273 | ipoib_neigh_free(dev, neigh); |
| 1274 | } |
| 1275 | list_del(&p->list); |
| 1276 | kfree(p); |
| 1277 | } |
| 1278 | } |
| 1279 | spin_unlock(&priv->lock); |
| 1280 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 1281 | } |
| 1282 | |
| 1283 | static void ipoib_cm_tx_reap(struct work_struct *work) |
| 1284 | { |
| 1285 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1286 | cm.reap_task); |
| 1287 | struct ipoib_cm_tx *p; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1288 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1289 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1290 | spin_lock(&priv->lock); |
| 1291 | while (!list_empty(&priv->cm.reap_list)) { |
| 1292 | p = list_entry(priv->cm.reap_list.next, typeof(*p), list); |
| 1293 | list_del(&p->list); |
| 1294 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1295 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1296 | ipoib_cm_tx_destroy(p); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1297 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1298 | spin_lock(&priv->lock); |
| 1299 | } |
| 1300 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1301 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1302 | } |
| 1303 | |
| 1304 | static void ipoib_cm_skb_reap(struct work_struct *work) |
| 1305 | { |
| 1306 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1307 | cm.skb_task); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1308 | struct sk_buff *skb; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1309 | |
| 1310 | unsigned mtu = priv->mcast_mtu; |
| 1311 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1312 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1313 | spin_lock(&priv->lock); |
| 1314 | while ((skb = skb_dequeue(&priv->cm.skb_queue))) { |
| 1315 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1316 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1317 | if (skb->protocol == htons(ETH_P_IP)) |
| 1318 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); |
| 1319 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 1320 | else if (skb->protocol == htons(ETH_P_IPV6)) |
Roland Dreier | 20089ca | 2007-07-10 11:18:34 -0700 | [diff] [blame] | 1321 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, priv->dev); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1322 | #endif |
| 1323 | dev_kfree_skb_any(skb); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1324 | spin_lock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1325 | spin_lock(&priv->lock); |
| 1326 | } |
| 1327 | spin_unlock(&priv->lock); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1328 | spin_unlock_irq(&priv->tx_lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1329 | } |
| 1330 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1331 | 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] | 1332 | unsigned int mtu) |
| 1333 | { |
| 1334 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1335 | int e = skb_queue_empty(&priv->cm.skb_queue); |
| 1336 | |
| 1337 | if (skb->dst) |
| 1338 | skb->dst->ops->update_pmtu(skb->dst, mtu); |
| 1339 | |
| 1340 | skb_queue_tail(&priv->cm.skb_queue, skb); |
| 1341 | if (e) |
| 1342 | queue_work(ipoib_workqueue, &priv->cm.skb_task); |
| 1343 | } |
| 1344 | |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1345 | static void ipoib_cm_rx_reap(struct work_struct *work) |
| 1346 | { |
Roland Dreier | efcd997 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1347 | ipoib_cm_free_rx_reap_list(container_of(work, struct ipoib_dev_priv, |
| 1348 | cm.rx_reap_task)->dev); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1349 | } |
| 1350 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1351 | static void ipoib_cm_stale_task(struct work_struct *work) |
| 1352 | { |
| 1353 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, |
| 1354 | cm.stale_task.work); |
| 1355 | struct ipoib_cm_rx *p; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1356 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1357 | |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1358 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1359 | while (!list_empty(&priv->cm.passive_ids)) { |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1360 | /* List is sorted by LRU, start from tail, |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1361 | * stop when we see a recently used entry */ |
| 1362 | p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); |
Michael S. Tsirkin | 60a596d | 2007-03-22 14:32:09 -0700 | [diff] [blame] | 1363 | if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1364 | break; |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1365 | list_move(&p->list, &priv->cm.rx_error_list); |
| 1366 | p->state = IPOIB_CM_RX_ERROR; |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1367 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1368 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
| 1369 | if (ret) |
| 1370 | 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] | 1371 | spin_lock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1372 | } |
Michael S. Tsirkin | 7c5b9ef | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 1373 | |
| 1374 | if (!list_empty(&priv->cm.passive_ids)) |
| 1375 | queue_delayed_work(ipoib_workqueue, |
| 1376 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
Roland Dreier | 37aebbde | 2007-04-24 21:30:37 -0700 | [diff] [blame] | 1377 | spin_unlock_irq(&priv->lock); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1378 | } |
| 1379 | |
| 1380 | |
Roland Dreier | 2337f80 | 2007-10-23 19:57:54 -0700 | [diff] [blame] | 1381 | 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] | 1382 | char *buf) |
| 1383 | { |
| 1384 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(d)); |
| 1385 | |
| 1386 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) |
| 1387 | return sprintf(buf, "connected\n"); |
| 1388 | else |
| 1389 | return sprintf(buf, "datagram\n"); |
| 1390 | } |
| 1391 | |
| 1392 | static ssize_t set_mode(struct device *d, struct device_attribute *attr, |
| 1393 | const char *buf, size_t count) |
| 1394 | { |
| 1395 | struct net_device *dev = to_net_dev(d); |
| 1396 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1397 | |
| 1398 | /* flush paths if we switch modes so that connections are restarted */ |
| 1399 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { |
| 1400 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); |
| 1401 | ipoib_warn(priv, "enabling connected mode " |
| 1402 | "will cause multicast packet drops\n"); |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1403 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 1404 | dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO); |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1405 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; |
| 1406 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1407 | ipoib_flush_paths(dev); |
| 1408 | return count; |
| 1409 | } |
| 1410 | |
| 1411 | if (!strcmp(buf, "datagram\n")) { |
| 1412 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); |
| 1413 | dev->mtu = min(priv->mcast_mtu, dev->mtu); |
| 1414 | ipoib_flush_paths(dev); |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1415 | |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 1416 | if (test_bit(IPOIB_FLAG_CSUM, &priv->flags)) { |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1417 | dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; |
Eli Cohen | 40ca198 | 2008-04-16 21:09:27 -0700 | [diff] [blame] | 1418 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
| 1419 | dev->features |= NETIF_F_TSO; |
| 1420 | } |
Eli Cohen | 6046136 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1421 | |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1422 | return count; |
| 1423 | } |
| 1424 | |
| 1425 | return -EINVAL; |
| 1426 | } |
| 1427 | |
Roland Dreier | 551fd61 | 2007-02-16 13:57:33 -0800 | [diff] [blame] | 1428 | 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] | 1429 | |
| 1430 | int ipoib_cm_add_mode_attr(struct net_device *dev) |
| 1431 | { |
| 1432 | return device_create_file(&dev->dev, &dev_attr_mode); |
| 1433 | } |
| 1434 | |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1435 | 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] | 1436 | { |
| 1437 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 1438 | struct ib_srq_init_attr srq_init_attr = { |
| 1439 | .attr = { |
| 1440 | .max_wr = ipoib_recvq_size, |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1441 | .max_sge = max_sge |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1442 | } |
| 1443 | }; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1444 | |
| 1445 | priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); |
| 1446 | if (IS_ERR(priv->cm.srq)) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1447 | if (PTR_ERR(priv->cm.srq) != -ENOSYS) |
| 1448 | printk(KERN_WARNING "%s: failed to allocate SRQ, error %ld\n", |
| 1449 | priv->ca->name, PTR_ERR(priv->cm.srq)); |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1450 | priv->cm.srq = NULL; |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1451 | return; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1452 | } |
| 1453 | |
| 1454 | priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring, |
| 1455 | GFP_KERNEL); |
| 1456 | if (!priv->cm.srq_ring) { |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1457 | 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] | 1458 | priv->ca->name, ipoib_recvq_size); |
| 1459 | ib_destroy_srq(priv->cm.srq); |
| 1460 | priv->cm.srq = NULL; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1461 | } |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1462 | } |
| 1463 | |
| 1464 | int ipoib_cm_dev_init(struct net_device *dev) |
| 1465 | { |
| 1466 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1467 | int i, ret; |
| 1468 | struct ib_device_attr attr; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1469 | |
| 1470 | INIT_LIST_HEAD(&priv->cm.passive_ids); |
| 1471 | INIT_LIST_HEAD(&priv->cm.reap_list); |
| 1472 | INIT_LIST_HEAD(&priv->cm.start_list); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1473 | INIT_LIST_HEAD(&priv->cm.rx_error_list); |
| 1474 | INIT_LIST_HEAD(&priv->cm.rx_flush_list); |
| 1475 | INIT_LIST_HEAD(&priv->cm.rx_drain_list); |
| 1476 | INIT_LIST_HEAD(&priv->cm.rx_reap_list); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1477 | INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); |
| 1478 | INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); |
| 1479 | INIT_WORK(&priv->cm.skb_task, ipoib_cm_skb_reap); |
Michael S. Tsirkin | 518b164 | 2007-05-21 15:04:59 +0300 | [diff] [blame] | 1480 | INIT_WORK(&priv->cm.rx_reap_task, ipoib_cm_rx_reap); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1481 | INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); |
| 1482 | |
| 1483 | skb_queue_head_init(&priv->cm.skb_queue); |
| 1484 | |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1485 | ret = ib_query_device(priv->ca, &attr); |
| 1486 | if (ret) { |
| 1487 | printk(KERN_WARNING "ib_query_device() failed with %d\n", ret); |
| 1488 | return ret; |
| 1489 | } |
| 1490 | |
| 1491 | ipoib_dbg(priv, "max_srq_sge=%d\n", attr.max_srq_sge); |
| 1492 | |
| 1493 | attr.max_srq_sge = min_t(int, IPOIB_CM_RX_SG, attr.max_srq_sge); |
| 1494 | ipoib_cm_create_srq(dev, attr.max_srq_sge); |
| 1495 | if (ipoib_cm_has_srq(dev)) { |
| 1496 | priv->cm.max_cm_mtu = attr.max_srq_sge * PAGE_SIZE - 0x10; |
| 1497 | priv->cm.num_frags = attr.max_srq_sge; |
| 1498 | ipoib_dbg(priv, "max_cm_mtu = 0x%x, num_frags=%d\n", |
| 1499 | priv->cm.max_cm_mtu, priv->cm.num_frags); |
| 1500 | } else { |
| 1501 | priv->cm.max_cm_mtu = IPOIB_CM_MTU; |
| 1502 | priv->cm.num_frags = IPOIB_CM_RX_SG; |
| 1503 | } |
| 1504 | |
| 1505 | for (i = 0; i < priv->cm.num_frags; ++i) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1506 | priv->cm.rx_sge[i].lkey = priv->mr->lkey; |
| 1507 | |
| 1508 | priv->cm.rx_sge[0].length = IPOIB_CM_HEAD_SIZE; |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1509 | for (i = 1; i < priv->cm.num_frags; ++i) |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1510 | priv->cm.rx_sge[i].length = PAGE_SIZE; |
| 1511 | priv->cm.rx_wr.next = NULL; |
| 1512 | priv->cm.rx_wr.sg_list = priv->cm.rx_sge; |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1513 | priv->cm.rx_wr.num_sge = priv->cm.num_frags; |
Roland Dreier | 7b3687d | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1514 | |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1515 | if (ipoib_cm_has_srq(dev)) { |
| 1516 | for (i = 0; i < ipoib_recvq_size; ++i) { |
| 1517 | if (!ipoib_cm_alloc_rx_skb(dev, priv->cm.srq_ring, i, |
Pradeep Satyanarayana | 586a693 | 2007-12-21 13:08:23 -0800 | [diff] [blame] | 1518 | priv->cm.num_frags - 1, |
Pradeep Satyanarayana | 68e995a | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1519 | priv->cm.srq_ring[i].mapping)) { |
| 1520 | ipoib_warn(priv, "failed to allocate " |
| 1521 | "receive buffer %d\n", i); |
| 1522 | ipoib_cm_dev_cleanup(dev); |
| 1523 | return -ENOMEM; |
| 1524 | } |
| 1525 | |
| 1526 | if (ipoib_cm_post_receive_srq(dev, i)) { |
| 1527 | ipoib_warn(priv, "ipoib_cm_post_receive_srq " |
| 1528 | "failed for buf %d\n", i); |
| 1529 | ipoib_cm_dev_cleanup(dev); |
| 1530 | return -EIO; |
| 1531 | } |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1532 | } |
| 1533 | } |
| 1534 | |
| 1535 | priv->dev->dev_addr[0] = IPOIB_FLAGS_RC; |
| 1536 | return 0; |
| 1537 | } |
| 1538 | |
| 1539 | void ipoib_cm_dev_cleanup(struct net_device *dev) |
| 1540 | { |
| 1541 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1542 | int ret; |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1543 | |
| 1544 | if (!priv->cm.srq) |
| 1545 | return; |
| 1546 | |
| 1547 | ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); |
| 1548 | |
| 1549 | ret = ib_destroy_srq(priv->cm.srq); |
| 1550 | if (ret) |
| 1551 | ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); |
| 1552 | |
| 1553 | priv->cm.srq = NULL; |
| 1554 | if (!priv->cm.srq_ring) |
| 1555 | return; |
Roland Dreier | 1efb614 | 2008-01-25 14:15:24 -0800 | [diff] [blame] | 1556 | |
| 1557 | ipoib_cm_free_rx_ring(dev, priv->cm.srq_ring); |
Michael S. Tsirkin | 839fcab | 2007-02-05 22:12:23 +0200 | [diff] [blame] | 1558 | priv->cm.srq_ring = NULL; |
| 1559 | } |