diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/srq.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/srq.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/srq.c b/drivers/net/ethernet/mellanox/mlx4/srq.c new file mode 100644 index 000000000..dd890f5d7 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx4/srq.c @@ -0,0 +1,304 @@ +/* + * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2007, 2008 Mellanox Technologies. 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/mlx4/cmd.h> +#include <linux/mlx4/srq.h> +#include <linux/export.h> +#include <linux/gfp.h> + +#include "mlx4.h" +#include "icm.h" + +void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type) +{ + struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; + struct mlx4_srq *srq; + + rcu_read_lock(); + srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1)); + rcu_read_unlock(); + if (srq) + refcount_inc(&srq->refcount); + else { + mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn); + return; + } + + srq->event(srq, event_type); + + if (refcount_dec_and_test(&srq->refcount)) + complete(&srq->free); +} + +static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, + int srq_num) +{ + return mlx4_cmd(dev, mailbox->dma, srq_num, 0, + MLX4_CMD_SW2HW_SRQ, MLX4_CMD_TIME_CLASS_A, + MLX4_CMD_WRAPPED); +} + +static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, + int srq_num) +{ + return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num, + mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ, + MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); +} + +static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark) +{ + return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ, + MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED); +} + +static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, + int srq_num) +{ + return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ, + MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); +} + +int __mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn) +{ + struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; + int err; + + + *srqn = mlx4_bitmap_alloc(&srq_table->bitmap); + if (*srqn == -1) + return -ENOMEM; + + err = mlx4_table_get(dev, &srq_table->table, *srqn); + if (err) + goto err_out; + + err = mlx4_table_get(dev, &srq_table->cmpt_table, *srqn); + if (err) + goto err_put; + return 0; + +err_put: + mlx4_table_put(dev, &srq_table->table, *srqn); + +err_out: + mlx4_bitmap_free(&srq_table->bitmap, *srqn, MLX4_NO_RR); + return err; +} + +static int mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn) +{ + u64 out_param; + int err; + + if (mlx4_is_mfunc(dev)) { + err = mlx4_cmd_imm(dev, 0, &out_param, RES_SRQ, + RES_OP_RESERVE_AND_MAP, + MLX4_CMD_ALLOC_RES, + MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); + if (!err) + *srqn = get_param_l(&out_param); + + return err; + } + return __mlx4_srq_alloc_icm(dev, srqn); +} + +void __mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn) +{ + struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; + + mlx4_table_put(dev, &srq_table->cmpt_table, srqn); + mlx4_table_put(dev, &srq_table->table, srqn); + mlx4_bitmap_free(&srq_table->bitmap, srqn, MLX4_NO_RR); +} + +static void mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn) +{ + u64 in_param = 0; + + if (mlx4_is_mfunc(dev)) { + set_param_l(&in_param, srqn); + if (mlx4_cmd(dev, in_param, RES_SRQ, RES_OP_RESERVE_AND_MAP, + MLX4_CMD_FREE_RES, + MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) + mlx4_warn(dev, "Failed freeing cq:%d\n", srqn); + return; + } + __mlx4_srq_free_icm(dev, srqn); +} + +int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd, + struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq) +{ + struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; + struct mlx4_cmd_mailbox *mailbox; + struct mlx4_srq_context *srq_context; + u64 mtt_addr; + int err; + + err = mlx4_srq_alloc_icm(dev, &srq->srqn); + if (err) + return err; + + spin_lock_irq(&srq_table->lock); + err = radix_tree_insert(&srq_table->tree, srq->srqn, srq); + spin_unlock_irq(&srq_table->lock); + if (err) + goto err_icm; + + mailbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(mailbox)) { + err = PTR_ERR(mailbox); + goto err_radix; + } + + srq_context = mailbox->buf; + srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) | + srq->srqn); + srq_context->logstride = srq->wqe_shift - 4; + srq_context->xrcd = cpu_to_be16(xrcd); + srq_context->pg_offset_cqn = cpu_to_be32(cqn & 0xffffff); + srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT; + + mtt_addr = mlx4_mtt_addr(dev, mtt); + srq_context->mtt_base_addr_h = mtt_addr >> 32; + srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); + srq_context->pd = cpu_to_be32(pdn); + srq_context->db_rec_addr = cpu_to_be64(db_rec); + + err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn); + mlx4_free_cmd_mailbox(dev, mailbox); + if (err) + goto err_radix; + + refcount_set(&srq->refcount, 1); + init_completion(&srq->free); + + return 0; + +err_radix: + spin_lock_irq(&srq_table->lock); + radix_tree_delete(&srq_table->tree, srq->srqn); + spin_unlock_irq(&srq_table->lock); + +err_icm: + mlx4_srq_free_icm(dev, srq->srqn); + return err; +} +EXPORT_SYMBOL_GPL(mlx4_srq_alloc); + +void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq) +{ + struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; + int err; + + err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn); + if (err) + mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn); + + spin_lock_irq(&srq_table->lock); + radix_tree_delete(&srq_table->tree, srq->srqn); + spin_unlock_irq(&srq_table->lock); + + if (refcount_dec_and_test(&srq->refcount)) + complete(&srq->free); + wait_for_completion(&srq->free); + + mlx4_srq_free_icm(dev, srq->srqn); +} +EXPORT_SYMBOL_GPL(mlx4_srq_free); + +int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark) +{ + return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark); +} +EXPORT_SYMBOL_GPL(mlx4_srq_arm); + +int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark) +{ + struct mlx4_cmd_mailbox *mailbox; + struct mlx4_srq_context *srq_context; + int err; + + mailbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + + srq_context = mailbox->buf; + + err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn); + if (err) + goto err_out; + *limit_watermark = be16_to_cpu(srq_context->limit_watermark); + +err_out: + mlx4_free_cmd_mailbox(dev, mailbox); + return err; +} +EXPORT_SYMBOL_GPL(mlx4_srq_query); + +int mlx4_init_srq_table(struct mlx4_dev *dev) +{ + struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; + + spin_lock_init(&srq_table->lock); + INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC); + if (mlx4_is_slave(dev)) + return 0; + + return mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs, + dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0); +} + +void mlx4_cleanup_srq_table(struct mlx4_dev *dev) +{ + if (mlx4_is_slave(dev)) + return; + mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap); +} + +struct mlx4_srq *mlx4_srq_lookup(struct mlx4_dev *dev, u32 srqn) +{ + struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; + struct mlx4_srq *srq; + + rcu_read_lock(); + srq = radix_tree_lookup(&srq_table->tree, + srqn & (dev->caps.num_srqs - 1)); + rcu_read_unlock(); + + return srq; +} +EXPORT_SYMBOL_GPL(mlx4_srq_lookup); 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