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/*
* Copyright (c) 2013, Mellanox Technologies 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/kernel.h>
#include <linux/module.h>
#include <linux/hardirq.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/cmd.h>
#include <rdma/ib_verbs.h>
#include <linux/mlx5/cq.h>
#include "mlx5_core.h"
void mlx5_cq_completion(struct mlx5_core_dev *dev, u32 cqn)
{
struct mlx5_core_cq *cq;
struct mlx5_cq_table *table = &dev->priv.cq_table;
spin_lock(&table->lock);
cq = radix_tree_lookup(&table->tree, cqn);
if (likely(cq))
atomic_inc(&cq->refcount);
spin_unlock(&table->lock);
if (!cq) {
mlx5_core_warn(dev, "Completion event for bogus CQ 0x%x\n", cqn);
return;
}
++cq->arm_sn;
cq->comp(cq);
if (atomic_dec_and_test(&cq->refcount))
complete(&cq->free);
}
void mlx5_cq_event(struct mlx5_core_dev *dev, u32 cqn, int event_type)
{
struct mlx5_cq_table *table = &dev->priv.cq_table;
struct mlx5_core_cq *cq;
spin_lock(&table->lock);
cq = radix_tree_lookup(&table->tree, cqn);
if (cq)
atomic_inc(&cq->refcount);
spin_unlock(&table->lock);
if (!cq) {
mlx5_core_warn(dev, "Async event for bogus CQ 0x%x\n", cqn);
return;
}
cq->event(cq, event_type);
if (atomic_dec_and_test(&cq->refcount))
complete(&cq->free);
}
int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
struct mlx5_create_cq_mbox_in *in, int inlen)
{
int err;
struct mlx5_cq_table *table = &dev->priv.cq_table;
struct mlx5_create_cq_mbox_out out;
struct mlx5_destroy_cq_mbox_in din;
struct mlx5_destroy_cq_mbox_out dout;
in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_CQ);
memset(&out, 0, sizeof(out));
err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out));
if (err)
return err;
if (out.hdr.status)
return mlx5_cmd_status_to_err(&out.hdr);
cq->cqn = be32_to_cpu(out.cqn) & 0xffffff;
cq->cons_index = 0;
cq->arm_sn = 0;
atomic_set(&cq->refcount, 1);
init_completion(&cq->free);
spin_lock_irq(&table->lock);
err = radix_tree_insert(&table->tree, cq->cqn, cq);
spin_unlock_irq(&table->lock);
if (err)
goto err_cmd;
cq->pid = current->pid;
err = mlx5_debug_cq_add(dev, cq);
if (err)
mlx5_core_dbg(dev, "failed adding CP 0x%x to debug file system\n",
cq->cqn);
return 0;
err_cmd:
memset(&din, 0, sizeof(din));
memset(&dout, 0, sizeof(dout));
din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ);
mlx5_cmd_exec(dev, &din, sizeof(din), &dout, sizeof(dout));
return err;
}
EXPORT_SYMBOL(mlx5_core_create_cq);
int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
{
struct mlx5_cq_table *table = &dev->priv.cq_table;
struct mlx5_destroy_cq_mbox_in in;
struct mlx5_destroy_cq_mbox_out out;
struct mlx5_core_cq *tmp;
int err;
spin_lock_irq(&table->lock);
tmp = radix_tree_delete(&table->tree, cq->cqn);
spin_unlock_irq(&table->lock);
if (!tmp) {
mlx5_core_warn(dev, "cq 0x%x not found in tree\n", cq->cqn);
return -EINVAL;
}
if (tmp != cq) {
mlx5_core_warn(dev, "corruption on srqn 0x%x\n", cq->cqn);
return -EINVAL;
}
memset(&in, 0, sizeof(in));
memset(&out, 0, sizeof(out));
in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ);
in.cqn = cpu_to_be32(cq->cqn);
err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
if (err)
return err;
if (out.hdr.status)
return mlx5_cmd_status_to_err(&out.hdr);
synchronize_irq(cq->irqn);
mlx5_debug_cq_remove(dev, cq);
if (atomic_dec_and_test(&cq->refcount))
complete(&cq->free);
wait_for_completion(&cq->free);
return 0;
}
EXPORT_SYMBOL(mlx5_core_destroy_cq);
int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
struct mlx5_query_cq_mbox_out *out)
{
struct mlx5_query_cq_mbox_in in;
int err;
memset(&in, 0, sizeof(in));
memset(out, 0, sizeof(*out));
in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_CQ);
in.cqn = cpu_to_be32(cq->cqn);
err = mlx5_cmd_exec(dev, &in, sizeof(in), out, sizeof(*out));
if (err)
return err;
if (out->hdr.status)
return mlx5_cmd_status_to_err(&out->hdr);
return err;
}
EXPORT_SYMBOL(mlx5_core_query_cq);
int mlx5_core_modify_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
int type, struct mlx5_cq_modify_params *params)
{
return -ENOSYS;
}
int mlx5_init_cq_table(struct mlx5_core_dev *dev)
{
struct mlx5_cq_table *table = &dev->priv.cq_table;
int err;
spin_lock_init(&table->lock);
INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
err = mlx5_cq_debugfs_init(dev);
return err;
}
void mlx5_cleanup_cq_table(struct mlx5_core_dev *dev)
{
mlx5_cq_debugfs_cleanup(dev);
}
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