/* * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. 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/init.h> #include <linux/hardirq.h> #include <linux/mlx4/cmd.h> #include <linux/mlx4/cq.h> #include "mlx4.h" #include "icm.h" struct mlx4_cq_context { __be32 flags; u16 reserved1[3]; __be16 page_offset; __be32 logsize_usrpage; __be16 cq_period; __be16 cq_max_count; u8 reserved2[3]; u8 comp_eqn; u8 log_page_size; u8 reserved3[2]; u8 mtt_base_addr_h; __be32 mtt_base_addr_l; __be32 last_notified_index; __be32 solicit_producer_index; __be32 consumer_index; __be32 producer_index; u32 reserved4[2]; __be64 db_rec_addr; }; #define MLX4_CQ_STATUS_OK ( 0 << 28) #define MLX4_CQ_STATUS_OVERFLOW ( 9 << 28) #define MLX4_CQ_STATUS_WRITE_FAIL (10 << 28) #define MLX4_CQ_FLAG_CC ( 1 << 18) #define MLX4_CQ_FLAG_OI ( 1 << 17) #define MLX4_CQ_STATE_ARMED ( 9 << 8) #define MLX4_CQ_STATE_ARMED_SOL ( 6 << 8) #define MLX4_EQ_STATE_FIRED (10 << 8) void mlx4_cq_completion(struct mlx4_dev *dev, u32 cqn) { struct mlx4_cq *cq; cq = radix_tree_lookup(&mlx4_priv(dev)->cq_table.tree, cqn & (dev->caps.num_cqs - 1)); if (!cq) { mlx4_warn(dev, "Completion event for bogus CQ %08x\n", cqn); return; } ++cq->arm_sn; cq->comp(cq); } void mlx4_cq_event(struct mlx4_dev *dev, u32 cqn, int event_type) { struct mlx4_cq_table *cq_table = &mlx4_priv(dev)->cq_table; struct mlx4_cq *cq; spin_lock(&cq_table->lock); cq = radix_tree_lookup(&cq_table->tree, cqn & (dev->caps.num_cqs - 1)); if (cq) atomic_inc(&cq->refcount); spin_unlock(&cq_table->lock); if (!cq) { mlx4_warn(dev, "Async event for bogus CQ %08x\n", cqn); return; } cq->event(cq, event_type); if (atomic_dec_and_test(&cq->refcount)) complete(&cq->free); } static int mlx4_SW2HW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, int cq_num) { return mlx4_cmd(dev, mailbox->dma, cq_num, 0, MLX4_CMD_SW2HW_CQ, MLX4_CMD_TIME_CLASS_A); } static int mlx4_MODIFY_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, int cq_num, u32 opmod) { return mlx4_cmd(dev, mailbox->dma, cq_num, opmod, MLX4_CMD_MODIFY_CQ, MLX4_CMD_TIME_CLASS_A); } static int mlx4_HW2SW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, int cq_num) { return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, cq_num, mailbox ? 0 : 1, MLX4_CMD_HW2SW_CQ, MLX4_CMD_TIME_CLASS_A); } int mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq, u16 count, u16 period) { struct mlx4_cmd_mailbox *mailbox; struct mlx4_cq_context *cq_context; int err; mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); cq_context = mailbox->buf; memset(cq_context, 0, sizeof *cq_context); cq_context->cq_max_count = cpu_to_be16(count); cq_context->cq_period = cpu_to_be16(period); err = mlx4_MODIFY_CQ(dev, mailbox, cq->cqn, 1); mlx4_free_cmd_mailbox(dev, mailbox); return err; } EXPORT_SYMBOL_GPL(mlx4_cq_modify); int mlx4_cq_resize(struct mlx4_dev *dev, struct mlx4_cq *cq, int entries, struct mlx4_mtt *mtt) { struct mlx4_cmd_mailbox *mailbox; struct mlx4_cq_context *cq_context; u64 mtt_addr; int err; mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); cq_context = mailbox->buf; memset(cq_context, 0, sizeof *cq_context); cq_context->logsize_usrpage = cpu_to_be32(ilog2(entries) << 24); cq_context->log_page_size = mtt->page_shift - 12; mtt_addr = mlx4_mtt_addr(dev, mtt); cq_context->mtt_base_addr_h = mtt_addr >> 32; cq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); err = mlx4_MODIFY_CQ(dev, mailbox, cq->cqn, 0); mlx4_free_cmd_mailbox(dev, mailbox); return err; } EXPORT_SYMBOL_GPL(mlx4_cq_resize); int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt, struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq, unsigned vector, int collapsed) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_cq_table *cq_table = &priv->cq_table; struct mlx4_cmd_mailbox *mailbox; struct mlx4_cq_context *cq_context; u64 mtt_addr; int err; if (vector >= dev->caps.num_comp_vectors) return -EINVAL; cq->vector = vector; cq->cqn = mlx4_bitmap_alloc(&cq_table->bitmap); if (cq->cqn == -1) return -ENOMEM; err = mlx4_table_get(dev, &cq_table->table, cq->cqn); if (err) goto err_out; err = mlx4_table_get(dev, &cq_table->cmpt_table, cq->cqn); if (err) goto err_put; spin_lock_irq(&cq_table->lock); err = radix_tree_insert(&cq_table->tree, cq->cqn, cq); spin_unlock_irq(&cq_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; } cq_context = mailbox->buf; memset(cq_context, 0, sizeof *cq_context); cq_context->flags = cpu_to_be32(!!collapsed << 18); cq_context->logsize_usrpage = cpu_to_be32((ilog2(nent) << 24) | uar->index); cq_context->comp_eqn = priv->eq_table.eq[vector].eqn; cq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT; mtt_addr = mlx4_mtt_addr(dev, mtt); cq_context->mtt_base_addr_h = mtt_addr >> 32; cq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); cq_context->db_rec_addr = cpu_to_be64(db_rec); err = mlx4_SW2HW_CQ(dev, mailbox, cq->cqn); mlx4_free_cmd_mailbox(dev, mailbox); if (err) goto err_radix; cq->cons_index = 0; cq->arm_sn = 1; cq->uar = uar; atomic_set(&cq->refcount, 1); init_completion(&cq->free); return 0; err_radix: spin_lock_irq(&cq_table->lock); radix_tree_delete(&cq_table->tree, cq->cqn); spin_unlock_irq(&cq_table->lock); err_cmpt_put: mlx4_table_put(dev, &cq_table->cmpt_table, cq->cqn); err_put: mlx4_table_put(dev, &cq_table->table, cq->cqn); err_out: mlx4_bitmap_free(&cq_table->bitmap, cq->cqn); return err; } EXPORT_SYMBOL_GPL(mlx4_cq_alloc); void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_cq_table *cq_table = &priv->cq_table; int err; err = mlx4_HW2SW_CQ(dev, NULL, cq->cqn); if (err) mlx4_warn(dev, "HW2SW_CQ failed (%d) for CQN %06x\n", err, cq->cqn); synchronize_irq(priv->eq_table.eq[cq->vector].irq); spin_lock_irq(&cq_table->lock); radix_tree_delete(&cq_table->tree, cq->cqn); spin_unlock_irq(&cq_table->lock); if (atomic_dec_and_test(&cq->refcount)) complete(&cq->free); wait_for_completion(&cq->free); mlx4_table_put(dev, &cq_table->table, cq->cqn); mlx4_bitmap_free(&cq_table->bitmap, cq->cqn); } EXPORT_SYMBOL_GPL(mlx4_cq_free); int mlx4_init_cq_table(struct mlx4_dev *dev) { struct mlx4_cq_table *cq_table = &mlx4_priv(dev)->cq_table; int err; spin_lock_init(&cq_table->lock); INIT_RADIX_TREE(&cq_table->tree, GFP_ATOMIC); err = mlx4_bitmap_init(&cq_table->bitmap, dev->caps.num_cqs, dev->caps.num_cqs - 1, dev->caps.reserved_cqs, 0); if (err) return err; return 0; } void mlx4_cleanup_cq_table(struct mlx4_dev *dev) { /* Nothing to do to clean up radix_tree */ mlx4_bitmap_cleanup(&mlx4_priv(dev)->cq_table.bitmap); }