diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/qp.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/qp.c | 625 |
1 files changed, 625 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/qp.c b/drivers/net/ethernet/mellanox/mlx4/qp.c new file mode 100644 index 00000000000..0dc31d85fc3 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx4/qp.c @@ -0,0 +1,625 @@ +/* + * 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 <linux/gfp.h> +#include <linux/export.h> + +#include <linux/mlx4/cmd.h> +#include <linux/mlx4/qp.h> + +#include "mlx4.h" +#include "icm.h" + +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) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + struct mlx4_qp_table *qp_table = &priv->qp_table; + + *base = mlx4_bitmap_alloc_range(&qp_table->bitmap, cnt, align); + if (*base == -1) + return -ENOMEM; + + return 0; +} + +int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base) +{ + u64 in_param = 0; + u64 out_param; + int err; + + if (mlx4_is_mfunc(dev)) { + set_param_l(&in_param, 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); +} +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, struct mlx4_qp *qp, + 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; + 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; + } + + cmd->primary_addr_path_mask = cpu_to_be64(pri_addr_path_mask); + + err = mlx4_cmd(dev, mailbox->dma, qp->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); |