/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved. * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved. * Copyright (c) 2004 Voltaire, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include #include #include "mlx4.h" #include "icm.h" /* QP to support BF should have bits 6,7 cleared */ #define MLX4_BF_QP_SKIP_MASK 0xc0 #define MLX4_MAX_BF_QP_RANGE 0x40 void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type) { struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table; struct mlx4_qp *qp; spin_lock(&qp_table->lock); qp = __mlx4_qp_lookup(dev, qpn); if (qp) atomic_inc(&qp->refcount); spin_unlock(&qp_table->lock); if (!qp) { mlx4_dbg(dev, "Async event for none existent QP %08x\n", qpn); return; } qp->event(qp, event_type); if (atomic_dec_and_test(&qp->refcount)) complete(&qp->free); } /* used for INIT/CLOSE port logic */ static int is_master_qp0(struct mlx4_dev *dev, struct mlx4_qp *qp, int *real_qp0, int *proxy_qp0) { /* this procedure is called after we already know we are on the master */ /* qp0 is either the proxy qp0, or the real qp0 */ u32 pf_proxy_offset = dev->phys_caps.base_proxy_sqpn + 8 * mlx4_master_func_num(dev); *proxy_qp0 = qp->qpn >= pf_proxy_offset && qp->qpn <= pf_proxy_offset + 1; *real_qp0 = qp->qpn >= dev->phys_caps.base_sqpn && qp->qpn <= dev->phys_caps.base_sqpn + 1; return *real_qp0 || *proxy_qp0; } static int __mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt, enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state, struct mlx4_qp_context *context, enum mlx4_qp_optpar optpar, int sqd_event, struct mlx4_qp *qp, int native) { static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = { [MLX4_QP_STATE_RST] = { [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP, [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP, [MLX4_QP_STATE_INIT] = MLX4_CMD_RST2INIT_QP, }, [MLX4_QP_STATE_INIT] = { [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP, [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP, [MLX4_QP_STATE_INIT] = MLX4_CMD_INIT2INIT_QP, [MLX4_QP_STATE_RTR] = MLX4_CMD_INIT2RTR_QP, }, [MLX4_QP_STATE_RTR] = { [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP, [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP, [MLX4_QP_STATE_RTS] = MLX4_CMD_RTR2RTS_QP, }, [MLX4_QP_STATE_RTS] = { [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP, [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP, [MLX4_QP_STATE_RTS] = MLX4_CMD_RTS2RTS_QP, [MLX4_QP_STATE_SQD] = MLX4_CMD_RTS2SQD_QP, }, [MLX4_QP_STATE_SQD] = { [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP, [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP, [MLX4_QP_STATE_RTS] = MLX4_CMD_SQD2RTS_QP, [MLX4_QP_STATE_SQD] = MLX4_CMD_SQD2SQD_QP, }, [MLX4_QP_STATE_SQER] = { [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP, [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP, [MLX4_QP_STATE_RTS] = MLX4_CMD_SQERR2RTS_QP, }, [MLX4_QP_STATE_ERR] = { [MLX4_QP_STATE_RST] = MLX4_CMD_2RST_QP, [MLX4_QP_STATE_ERR] = MLX4_CMD_2ERR_QP, } }; struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_cmd_mailbox *mailbox; int ret = 0; int real_qp0 = 0; int proxy_qp0 = 0; u8 port; if (cur_state >= MLX4_QP_NUM_STATE || new_state >= MLX4_QP_NUM_STATE || !op[cur_state][new_state]) return -EINVAL; if (op[cur_state][new_state] == MLX4_CMD_2RST_QP) { ret = mlx4_cmd(dev, 0, qp->qpn, 2, MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A, native); if (mlx4_is_master(dev) && cur_state != MLX4_QP_STATE_ERR && cur_state != MLX4_QP_STATE_RST && is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) { port = (qp->qpn & 1) + 1; if (proxy_qp0) priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0; else priv->mfunc.master.qp0_state[port].qp0_active = 0; } return ret; } mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) { u64 mtt_addr = mlx4_mtt_addr(dev, mtt); context->mtt_base_addr_h = mtt_addr >> 32; context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT; } *(__be32 *) mailbox->buf = cpu_to_be32(optpar); memcpy(mailbox->buf + 8, context, sizeof *context); ((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn = cpu_to_be32(qp->qpn); ret = mlx4_cmd(dev, mailbox->dma, qp->qpn | (!!sqd_event << 31), new_state == MLX4_QP_STATE_RST ? 2 : 0, op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C, native); if (mlx4_is_master(dev) && is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) { port = (qp->qpn & 1) + 1; if (cur_state != MLX4_QP_STATE_ERR && cur_state != MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_ERR) { if (proxy_qp0) priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0; else priv->mfunc.master.qp0_state[port].qp0_active = 0; } else if (new_state == MLX4_QP_STATE_RTR) { if (proxy_qp0) priv->mfunc.master.qp0_state[port].proxy_qp0_active = 1; else priv->mfunc.master.qp0_state[port].qp0_active = 1; } } mlx4_free_cmd_mailbox(dev, mailbox); return ret; } int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt, enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state, struct mlx4_qp_context *context, enum mlx4_qp_optpar optpar, int sqd_event, struct mlx4_qp *qp) { return __mlx4_qp_modify(dev, mtt, cur_state, new_state, context, optpar, sqd_event, qp, 0); } EXPORT_SYMBOL_GPL(mlx4_qp_modify); int __mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base, u8 flags) { int bf_qp = !!(flags & (u8)MLX4_RESERVE_ETH_BF_QP); struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_qp_table *qp_table = &priv->qp_table; if (cnt > MLX4_MAX_BF_QP_RANGE && bf_qp) return -ENOMEM; *base = mlx4_bitmap_alloc_range(&qp_table->bitmap, cnt, align, bf_qp ? MLX4_BF_QP_SKIP_MASK : 0); if (*base == -1) return -ENOMEM; return 0; } int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base, u8 flags) { u64 in_param = 0; u64 out_param; int err; /* Turn off all unsupported QP allocation flags */ flags &= dev->caps.alloc_res_qp_mask; if (mlx4_is_mfunc(dev)) { set_param_l(&in_param, (((u32)flags) << 24) | (u32)cnt); set_param_h(&in_param, align); err = mlx4_cmd_imm(dev, in_param, &out_param, RES_QP, RES_OP_RESERVE, MLX4_CMD_ALLOC_RES, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); if (err) return err; *base = get_param_l(&out_param); return 0; } return __mlx4_qp_reserve_range(dev, cnt, align, base, flags); } EXPORT_SYMBOL_GPL(mlx4_qp_reserve_range); void __mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_qp_table *qp_table = &priv->qp_table; if (mlx4_is_qp_reserved(dev, (u32) base_qpn)) return; mlx4_bitmap_free_range(&qp_table->bitmap, base_qpn, cnt, MLX4_USE_RR); } void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt) { u64 in_param = 0; int err; if (mlx4_is_mfunc(dev)) { set_param_l(&in_param, base_qpn); set_param_h(&in_param, cnt); err = mlx4_cmd(dev, in_param, RES_QP, RES_OP_RESERVE, MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); if (err) { mlx4_warn(dev, "Failed to release qp range base:%d cnt:%d\n", base_qpn, cnt); } } else __mlx4_qp_release_range(dev, base_qpn, cnt); } EXPORT_SYMBOL_GPL(mlx4_qp_release_range); int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn, gfp_t gfp) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_qp_table *qp_table = &priv->qp_table; int err; err = mlx4_table_get(dev, &qp_table->qp_table, qpn, gfp); if (err) goto err_out; err = mlx4_table_get(dev, &qp_table->auxc_table, qpn, gfp); if (err) goto err_put_qp; err = mlx4_table_get(dev, &qp_table->altc_table, qpn, gfp); if (err) goto err_put_auxc; err = mlx4_table_get(dev, &qp_table->rdmarc_table, qpn, gfp); if (err) goto err_put_altc; err = mlx4_table_get(dev, &qp_table->cmpt_table, qpn, gfp); if (err) goto err_put_rdmarc; return 0; err_put_rdmarc: mlx4_table_put(dev, &qp_table->rdmarc_table, qpn); err_put_altc: mlx4_table_put(dev, &qp_table->altc_table, qpn); err_put_auxc: mlx4_table_put(dev, &qp_table->auxc_table, qpn); err_put_qp: mlx4_table_put(dev, &qp_table->qp_table, qpn); err_out: return err; } static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn, gfp_t gfp) { u64 param = 0; if (mlx4_is_mfunc(dev)) { set_param_l(¶m, qpn); return mlx4_cmd_imm(dev, param, ¶m, RES_QP, RES_OP_MAP_ICM, MLX4_CMD_ALLOC_RES, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); } return __mlx4_qp_alloc_icm(dev, qpn, gfp); } void __mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_qp_table *qp_table = &priv->qp_table; mlx4_table_put(dev, &qp_table->cmpt_table, qpn); mlx4_table_put(dev, &qp_table->rdmarc_table, qpn); mlx4_table_put(dev, &qp_table->altc_table, qpn); mlx4_table_put(dev, &qp_table->auxc_table, qpn); mlx4_table_put(dev, &qp_table->qp_table, qpn); } static void mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn) { u64 in_param = 0; if (mlx4_is_mfunc(dev)) { set_param_l(&in_param, qpn); if (mlx4_cmd(dev, in_param, RES_QP, RES_OP_MAP_ICM, MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) mlx4_warn(dev, "Failed to free icm of qp:%d\n", qpn); } else __mlx4_qp_free_icm(dev, qpn); } int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp, gfp_t gfp) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_qp_table *qp_table = &priv->qp_table; int err; if (!qpn) return -EINVAL; qp->qpn = qpn; err = mlx4_qp_alloc_icm(dev, qpn, gfp); if (err) return err; spin_lock_irq(&qp_table->lock); err = radix_tree_insert(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1), qp); spin_unlock_irq(&qp_table->lock); if (err) goto err_icm; atomic_set(&qp->refcount, 1); init_completion(&qp->free); return 0; err_icm: mlx4_qp_free_icm(dev, qpn); return err; } EXPORT_SYMBOL_GPL(mlx4_qp_alloc); #define MLX4_UPDATE_QP_SUPPORTED_ATTRS MLX4_UPDATE_QP_SMAC int mlx4_update_qp(struct mlx4_dev *dev, u32 qpn, enum mlx4_update_qp_attr attr, struct mlx4_update_qp_params *params) { struct mlx4_cmd_mailbox *mailbox; struct mlx4_update_qp_context *cmd; u64 pri_addr_path_mask = 0; u64 qp_mask = 0; int err = 0; mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); cmd = (struct mlx4_update_qp_context *)mailbox->buf; if (!attr || (attr & ~MLX4_UPDATE_QP_SUPPORTED_ATTRS)) return -EINVAL; if (attr & MLX4_UPDATE_QP_SMAC) { pri_addr_path_mask |= 1ULL << MLX4_UPD_QP_PATH_MASK_MAC_INDEX; cmd->qp_context.pri_path.grh_mylmc = params->smac_index; } if (attr & MLX4_UPDATE_QP_VSD) { qp_mask |= 1ULL << MLX4_UPD_QP_MASK_VSD; if (params->flags & MLX4_UPDATE_QP_PARAMS_FLAGS_VSD_ENABLE) cmd->qp_context.param3 |= cpu_to_be32(MLX4_STRIP_VLAN); } cmd->primary_addr_path_mask = cpu_to_be64(pri_addr_path_mask); cmd->qp_mask = cpu_to_be64(qp_mask); err = mlx4_cmd(dev, mailbox->dma, qpn & 0xffffff, 0, MLX4_CMD_UPDATE_QP, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE); mlx4_free_cmd_mailbox(dev, mailbox); return err; } EXPORT_SYMBOL_GPL(mlx4_update_qp); void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp) { struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table; unsigned long flags; spin_lock_irqsave(&qp_table->lock, flags); radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1)); spin_unlock_irqrestore(&qp_table->lock, flags); } EXPORT_SYMBOL_GPL(mlx4_qp_remove); void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp) { if (atomic_dec_and_test(&qp->refcount)) complete(&qp->free); wait_for_completion(&qp->free); mlx4_qp_free_icm(dev, qp->qpn); } EXPORT_SYMBOL_GPL(mlx4_qp_free); static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn) { return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP, MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); } int mlx4_init_qp_table(struct mlx4_dev *dev) { struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table; int err; int reserved_from_top = 0; int k; spin_lock_init(&qp_table->lock); INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC); if (mlx4_is_slave(dev)) return 0; /* * We reserve 2 extra QPs per port for the special QPs. The * block of special QPs must be aligned to a multiple of 8, so * round up. * * We also reserve the MSB of the 24-bit QP number to indicate * that a QP is an XRC QP. */ dev->phys_caps.base_sqpn = ALIGN(dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW], 8); { int sort[MLX4_NUM_QP_REGION]; int i, j, tmp; int last_base = dev->caps.num_qps; for (i = 1; i < MLX4_NUM_QP_REGION; ++i) sort[i] = i; for (i = MLX4_NUM_QP_REGION; i > 0; --i) { for (j = 2; j < i; ++j) { if (dev->caps.reserved_qps_cnt[sort[j]] > dev->caps.reserved_qps_cnt[sort[j - 1]]) { tmp = sort[j]; sort[j] = sort[j - 1]; sort[j - 1] = tmp; } } } for (i = 1; i < MLX4_NUM_QP_REGION; ++i) { last_base -= dev->caps.reserved_qps_cnt[sort[i]]; dev->caps.reserved_qps_base[sort[i]] = last_base; reserved_from_top += dev->caps.reserved_qps_cnt[sort[i]]; } } /* Reserve 8 real SQPs in both native and SRIOV modes. * In addition, in SRIOV mode, reserve 8 proxy SQPs per function * (for all PFs and VFs), and 8 corresponding tunnel QPs. * Each proxy SQP works opposite its own tunnel QP. * * The QPs are arranged as follows: * a. 8 real SQPs * b. All the proxy SQPs (8 per function) * c. All the tunnel QPs (8 per function) */ err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps, (1 << 23) - 1, mlx4_num_reserved_sqps(dev), reserved_from_top); if (err) return err; if (mlx4_is_mfunc(dev)) { /* for PPF use */ dev->phys_caps.base_proxy_sqpn = dev->phys_caps.base_sqpn + 8; dev->phys_caps.base_tunnel_sqpn = dev->phys_caps.base_sqpn + 8 + 8 * MLX4_MFUNC_MAX; /* In mfunc, calculate proxy and tunnel qp offsets for the PF here, * since the PF does not call mlx4_slave_caps */ dev->caps.qp0_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL); dev->caps.qp0_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL); dev->caps.qp1_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL); dev->caps.qp1_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL); if (!dev->caps.qp0_tunnel || !dev->caps.qp0_proxy || !dev->caps.qp1_tunnel || !dev->caps.qp1_proxy) { err = -ENOMEM; goto err_mem; } for (k = 0; k < dev->caps.num_ports; k++) { dev->caps.qp0_proxy[k] = dev->phys_caps.base_proxy_sqpn + 8 * mlx4_master_func_num(dev) + k; dev->caps.qp0_tunnel[k] = dev->caps.qp0_proxy[k] + 8 * MLX4_MFUNC_MAX; dev->caps.qp1_proxy[k] = dev->phys_caps.base_proxy_sqpn + 8 * mlx4_master_func_num(dev) + MLX4_MAX_PORTS + k; dev->caps.qp1_tunnel[k] = dev->caps.qp1_proxy[k] + 8 * MLX4_MFUNC_MAX; } } err = mlx4_CONF_SPECIAL_QP(dev, dev->phys_caps.base_sqpn); if (err) goto err_mem; return 0; err_mem: kfree(dev->caps.qp0_tunnel); kfree(dev->caps.qp0_proxy); kfree(dev->caps.qp1_tunnel); kfree(dev->caps.qp1_proxy); dev->caps.qp0_tunnel = dev->caps.qp0_proxy = dev->caps.qp1_tunnel = dev->caps.qp1_proxy = NULL; return err; } void mlx4_cleanup_qp_table(struct mlx4_dev *dev) { if (mlx4_is_slave(dev)) return; mlx4_CONF_SPECIAL_QP(dev, 0); mlx4_bitmap_cleanup(&mlx4_priv(dev)->qp_table.bitmap); } int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp, struct mlx4_qp_context *context) { struct mlx4_cmd_mailbox *mailbox; int err; mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); err = mlx4_cmd_box(dev, 0, mailbox->dma, qp->qpn, 0, MLX4_CMD_QUERY_QP, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); if (!err) memcpy(context, mailbox->buf + 8, sizeof *context); mlx4_free_cmd_mailbox(dev, mailbox); return err; } EXPORT_SYMBOL_GPL(mlx4_qp_query); int mlx4_qp_to_ready(struct mlx4_dev *dev, struct mlx4_mtt *mtt, struct mlx4_qp_context *context, struct mlx4_qp *qp, enum mlx4_qp_state *qp_state) { int err; int i; enum mlx4_qp_state states[] = { MLX4_QP_STATE_RST, MLX4_QP_STATE_INIT, MLX4_QP_STATE_RTR, MLX4_QP_STATE_RTS }; for (i = 0; i < ARRAY_SIZE(states) - 1; i++) { context->flags &= cpu_to_be32(~(0xf << 28)); context->flags |= cpu_to_be32(states[i + 1] << 28); err = mlx4_qp_modify(dev, mtt, states[i], states[i + 1], context, 0, 0, qp); if (err) { mlx4_err(dev, "Failed to bring QP to state: %d with error: %d\n", states[i + 1], err); return err; } *qp_state = states[i + 1]; } return 0; } EXPORT_SYMBOL_GPL(mlx4_qp_to_ready);