/* * Copyright (c) 2006, 2007 Cisco Systems, 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/init.h> #include <linux/mlx4/cmd.h> #include "mlx4.h" #include "icm.h" struct mlx4_srq_context { __be32 state_logsize_srqn; u8 logstride; u8 reserved1[3]; u8 pg_offset; u8 reserved2[3]; u32 reserved3; u8 log_page_size; u8 reserved4[2]; u8 mtt_base_addr_h; __be32 mtt_base_addr_l; __be32 pd; __be16 limit_watermark; __be16 wqe_cnt; u16 reserved5; __be16 wqe_counter; u32 reserved6; __be64 db_rec_addr; }; 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; spin_lock(&srq_table->lock); srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1)); if (srq) atomic_inc(&srq->refcount); spin_unlock(&srq_table->lock); if (!srq) { mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn); return; } srq->event(srq, event_type); if (atomic_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); } 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); } 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); } 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); } int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, 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; srq->srqn = mlx4_bitmap_alloc(&srq_table->bitmap); if (srq->srqn == -1) return -ENOMEM; err = mlx4_table_get(dev, &srq_table->table, srq->srqn); if (err) goto err_out; err = mlx4_table_get(dev, &srq_table->cmpt_table, srq->srqn); if (err) goto err_put; 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_cmpt_put; mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) { err = PTR_ERR(mailbox); goto err_radix; } srq_context = mailbox->buf; memset(srq_context, 0, sizeof *srq_context); srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) | srq->srqn); srq_context->logstride = srq->wqe_shift - 4; 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; atomic_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_cmpt_put: mlx4_table_put(dev, &srq_table->cmpt_table, srq->srqn); err_put: mlx4_table_put(dev, &srq_table->table, srq->srqn); err_out: mlx4_bitmap_free(&srq_table->bitmap, 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 (atomic_dec_and_test(&srq->refcount)) complete(&srq->free); wait_for_completion(&srq->free); mlx4_table_put(dev, &srq_table->table, srq->srqn); mlx4_bitmap_free(&srq_table->bitmap, 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; int err; spin_lock_init(&srq_table->lock); INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC); err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs, dev->caps.num_srqs - 1, dev->caps.reserved_srqs); if (err) return err; return 0; } void mlx4_cleanup_srq_table(struct mlx4_dev *dev) { mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap); }