drivers/net/ethernet/mellanox/mlx5/core/qp.c

   1 /*
   2  * Copyright (c) 2013, Mellanox Technologies inc.  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
  33
  34 #include <linux/gfp.h>
  35 #include <linux/export.h>
  36 #include <linux/mlx5/cmd.h>
  37 #include <linux/mlx5/qp.h>
  38 #include <linux/mlx5/driver.h>
  39
  40 #include "mlx5_core.h"
  41
  42 void mlx5_qp_event(struct mlx5_core_dev *dev, u32 qpn, int event_type)
  43 {
  44         struct mlx5_qp_table *table = &dev->priv.qp_table;
  45         struct mlx5_core_qp *qp;
  46
  47         spin_lock(&table->lock);
  48
  49         qp = radix_tree_lookup(&table->tree, qpn);
  50         if (qp)
  51                 atomic_inc(&qp->refcount);
  52
  53         spin_unlock(&table->lock);
  54
  55         if (!qp) {
  56                 mlx5_core_warn(dev, "Async event for bogus QP 0x%x\n", qpn);
  57                 return;
  58         }
  59
  60         qp->event(qp, event_type);
  61
  62         if (atomic_dec_and_test(&qp->refcount))
  63                 complete(&qp->free);
  64 }
  65
  66 int mlx5_core_create_qp(struct mlx5_core_dev *dev,
  67                         struct mlx5_core_qp *qp,
  68                         struct mlx5_create_qp_mbox_in *in,
  69                         int inlen)
  70 {
  71         struct mlx5_qp_table *table = &dev->priv.qp_table;
  72         struct mlx5_create_qp_mbox_out out;
  73         struct mlx5_destroy_qp_mbox_in din;
  74         struct mlx5_destroy_qp_mbox_out dout;
  75         int err;
  76
  77         memset(&out, 0, sizeof(out));
  78         in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_QP);
  79
  80         err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out));
  81         if (err) {
  82                 mlx5_core_warn(dev, "ret %d\n", err);
  83                 return err;
  84         }
  85
  86         if (out.hdr.status) {
  87                 mlx5_core_warn(dev, "current num of QPs 0x%x\n",
  88                                atomic_read(&dev->num_qps));
  89                 return mlx5_cmd_status_to_err(&out.hdr);
  90         }
  91
  92         qp->qpn = be32_to_cpu(out.qpn) & 0xffffff;
  93         mlx5_core_dbg(dev, "qpn = 0x%x\n", qp->qpn);
  94
  95         spin_lock_irq(&table->lock);
  96         err = radix_tree_insert(&table->tree, qp->qpn, qp);
  97         spin_unlock_irq(&table->lock);
  98         if (err) {
  99                 mlx5_core_warn(dev, "err %d\n", err);
 100                 goto err_cmd;
 101         }
 102
 103         err = mlx5_debug_qp_add(dev, qp);
 104         if (err)
 105                 mlx5_core_dbg(dev, "failed adding QP 0x%x to debug file system\n",
 106                               qp->qpn);
 107
 108         qp->pid = current->pid;
 109         atomic_set(&qp->refcount, 1);
 110         atomic_inc(&dev->num_qps);
 111         init_completion(&qp->free);
 112
 113         return 0;
 114
 115 err_cmd:
 116         memset(&din, 0, sizeof(din));
 117         memset(&dout, 0, sizeof(dout));
 118         din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_QP);
 119         din.qpn = cpu_to_be32(qp->qpn);
 120         mlx5_cmd_exec(dev, &din, sizeof(din), &out, sizeof(dout));
 121
 122         return err;
 123 }
 124 EXPORT_SYMBOL_GPL(mlx5_core_create_qp);
 125
 126 int mlx5_core_destroy_qp(struct mlx5_core_dev *dev,
 127                          struct mlx5_core_qp *qp)
 128 {
 129         struct mlx5_destroy_qp_mbox_in in;
 130         struct mlx5_destroy_qp_mbox_out out;
 131         struct mlx5_qp_table *table = &dev->priv.qp_table;
 132         unsigned long flags;
 133         int err;
 134
 135         mlx5_debug_qp_remove(dev, qp);
 136
 137         spin_lock_irqsave(&table->lock, flags);
 138         radix_tree_delete(&table->tree, qp->qpn);
 139         spin_unlock_irqrestore(&table->lock, flags);
 140
 141         if (atomic_dec_and_test(&qp->refcount))
 142                 complete(&qp->free);
 143         wait_for_completion(&qp->free);
 144
 145         memset(&in, 0, sizeof(in));
 146         memset(&out, 0, sizeof(out));
 147         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_QP);
 148         in.qpn = cpu_to_be32(qp->qpn);
 149         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 150         if (err)
 151                 return err;
 152
 153         if (out.hdr.status)
 154                 return mlx5_cmd_status_to_err(&out.hdr);
 155
 156         atomic_dec(&dev->num_qps);
 157         return 0;
 158 }
 159 EXPORT_SYMBOL_GPL(mlx5_core_destroy_qp);
 160
 161 int mlx5_core_qp_modify(struct mlx5_core_dev *dev, enum mlx5_qp_state cur_state,
 162                         enum mlx5_qp_state new_state,
 163                         struct mlx5_modify_qp_mbox_in *in, int sqd_event,
 164                         struct mlx5_core_qp *qp)
 165 {
 166         static const u16 optab[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE] = {
 167                 [MLX5_QP_STATE_RST] = {
 168                         [MLX5_QP_STATE_RST]     = MLX5_CMD_OP_2RST_QP,
 169                         [MLX5_QP_STATE_ERR]     = MLX5_CMD_OP_2ERR_QP,
 170                         [MLX5_QP_STATE_INIT]    = MLX5_CMD_OP_RST2INIT_QP,
 171                 },
 172                 [MLX5_QP_STATE_INIT]  = {
 173                         [MLX5_QP_STATE_RST]     = MLX5_CMD_OP_2RST_QP,
 174                         [MLX5_QP_STATE_ERR]     = MLX5_CMD_OP_2ERR_QP,
 175                         [MLX5_QP_STATE_INIT]    = MLX5_CMD_OP_INIT2INIT_QP,
 176                         [MLX5_QP_STATE_RTR]     = MLX5_CMD_OP_INIT2RTR_QP,
 177                 },
 178                 [MLX5_QP_STATE_RTR]   = {
 179                         [MLX5_QP_STATE_RST]     = MLX5_CMD_OP_2RST_QP,
 180                         [MLX5_QP_STATE_ERR]     = MLX5_CMD_OP_2ERR_QP,
 181                         [MLX5_QP_STATE_RTS]     = MLX5_CMD_OP_RTR2RTS_QP,
 182                 },
 183                 [MLX5_QP_STATE_RTS]   = {
 184                         [MLX5_QP_STATE_RST]     = MLX5_CMD_OP_2RST_QP,
 185                         [MLX5_QP_STATE_ERR]     = MLX5_CMD_OP_2ERR_QP,
 186                         [MLX5_QP_STATE_RTS]     = MLX5_CMD_OP_RTS2RTS_QP,
 187                         [MLX5_QP_STATE_SQD]     = MLX5_CMD_OP_RTS2SQD_QP,
 188                 },
 189                 [MLX5_QP_STATE_SQD] = {
 190                         [MLX5_QP_STATE_RST]     = MLX5_CMD_OP_2RST_QP,
 191                         [MLX5_QP_STATE_ERR]     = MLX5_CMD_OP_2ERR_QP,
 192                         [MLX5_QP_STATE_RTS]     = MLX5_CMD_OP_SQD2RTS_QP,
 193                         [MLX5_QP_STATE_SQD]     = MLX5_CMD_OP_SQD2SQD_QP,
 194                 },
 195                 [MLX5_QP_STATE_SQER] = {
 196                         [MLX5_QP_STATE_RST]     = MLX5_CMD_OP_2RST_QP,
 197                         [MLX5_QP_STATE_ERR]     = MLX5_CMD_OP_2ERR_QP,
 198                         [MLX5_QP_STATE_RTS]     = MLX5_CMD_OP_SQERR2RTS_QP,
 199                 },
 200                 [MLX5_QP_STATE_ERR] = {
 201                         [MLX5_QP_STATE_RST]     = MLX5_CMD_OP_2RST_QP,
 202                         [MLX5_QP_STATE_ERR]     = MLX5_CMD_OP_2ERR_QP,
 203                 }
 204         };
 205
 206         struct mlx5_modify_qp_mbox_out out;
 207         int err = 0;
 208         u16 op;
 209
 210         if (cur_state >= MLX5_QP_NUM_STATE || new_state >= MLX5_QP_NUM_STATE ||
 211             !optab[cur_state][new_state])
 212                 return -EINVAL;
 213
 214         memset(&out, 0, sizeof(out));
 215         op = optab[cur_state][new_state];
 216         in->hdr.opcode = cpu_to_be16(op);
 217         in->qpn = cpu_to_be32(qp->qpn);
 218         err = mlx5_cmd_exec(dev, in, sizeof(*in), &out, sizeof(out));
 219         if (err)
 220                 return err;
 221
 222         return mlx5_cmd_status_to_err(&out.hdr);
 223 }
 224 EXPORT_SYMBOL_GPL(mlx5_core_qp_modify);
 225
 226 void mlx5_init_qp_table(struct mlx5_core_dev *dev)
 227 {
 228         struct mlx5_qp_table *table = &dev->priv.qp_table;
 229
 230         spin_lock_init(&table->lock);
 231         INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
 232         mlx5_qp_debugfs_init(dev);
 233 }
 234
 235 void mlx5_cleanup_qp_table(struct mlx5_core_dev *dev)
 236 {
 237         mlx5_qp_debugfs_cleanup(dev);
 238 }
 239
 240 int mlx5_core_qp_query(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp,
 241                        struct mlx5_query_qp_mbox_out *out, int outlen)
 242 {
 243         struct mlx5_query_qp_mbox_in in;
 244         int err;
 245
 246         memset(&in, 0, sizeof(in));
 247         memset(out, 0, outlen);
 248         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_QP);
 249         in.qpn = cpu_to_be32(qp->qpn);
 250         err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
 251         if (err)
 252                 return err;
 253
 254         if (out->hdr.status)
 255                 return mlx5_cmd_status_to_err(&out->hdr);
 256
 257         return err;
 258 }
 259 EXPORT_SYMBOL_GPL(mlx5_core_qp_query);
 260
 261 int mlx5_core_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn)
 262 {
 263         struct mlx5_alloc_xrcd_mbox_in in;
 264         struct mlx5_alloc_xrcd_mbox_out out;
 265         int err;
 266
 267         memset(&in, 0, sizeof(in));
 268         memset(&out, 0, sizeof(out));
 269         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ALLOC_XRCD);
 270         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 271         if (err)
 272                 return err;
 273
 274         if (out.hdr.status)
 275                 err = mlx5_cmd_status_to_err(&out.hdr);
 276         else
 277                 *xrcdn = be32_to_cpu(out.xrcdn);
 278
 279         return err;
 280 }
 281 EXPORT_SYMBOL_GPL(mlx5_core_xrcd_alloc);
 282
 283 int mlx5_core_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn)
 284 {
 285         struct mlx5_dealloc_xrcd_mbox_in in;
 286         struct mlx5_dealloc_xrcd_mbox_out out;
 287         int err;
 288
 289         memset(&in, 0, sizeof(in));
 290         memset(&out, 0, sizeof(out));
 291         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DEALLOC_XRCD);
 292         in.xrcdn = cpu_to_be32(xrcdn);
 293         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 294         if (err)
 295                 return err;
 296
 297         if (out.hdr.status)
 298                 err = mlx5_cmd_status_to_err(&out.hdr);
 299
 300         return err;
 301 }
 302 EXPORT_SYMBOL_GPL(mlx5_core_xrcd_dealloc);