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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2013-2020, Mellanox Technologies inc. All rights reserved.
*/
#include <linux/gfp.h>
#include <linux/mlx5/qp.h>
#include <linux/mlx5/driver.h>
#include "mlx5_ib.h"
#include "qp.h"
static int mlx5_core_drain_dct(struct mlx5_ib_dev *dev,
struct mlx5_core_dct *dct);
static struct mlx5_core_rsc_common *
mlx5_get_rsc(struct mlx5_qp_table *table, u32 rsn)
{
struct mlx5_core_rsc_common *common;
unsigned long flags;
spin_lock_irqsave(&table->lock, flags);
common = radix_tree_lookup(&table->tree, rsn);
if (common)
refcount_inc(&common->refcount);
spin_unlock_irqrestore(&table->lock, flags);
return common;
}
void mlx5_core_put_rsc(struct mlx5_core_rsc_common *common)
{
if (refcount_dec_and_test(&common->refcount))
complete(&common->free);
}
static u64 qp_allowed_event_types(void)
{
u64 mask;
mask = BIT(MLX5_EVENT_TYPE_PATH_MIG) |
BIT(MLX5_EVENT_TYPE_COMM_EST) |
BIT(MLX5_EVENT_TYPE_SQ_DRAINED) |
BIT(MLX5_EVENT_TYPE_SRQ_LAST_WQE) |
BIT(MLX5_EVENT_TYPE_WQ_CATAS_ERROR) |
BIT(MLX5_EVENT_TYPE_PATH_MIG_FAILED) |
BIT(MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR) |
BIT(MLX5_EVENT_TYPE_WQ_ACCESS_ERROR);
return mask;
}
static u64 rq_allowed_event_types(void)
{
u64 mask;
mask = BIT(MLX5_EVENT_TYPE_SRQ_LAST_WQE) |
BIT(MLX5_EVENT_TYPE_WQ_CATAS_ERROR);
return mask;
}
static u64 sq_allowed_event_types(void)
{
return BIT(MLX5_EVENT_TYPE_WQ_CATAS_ERROR);
}
static u64 dct_allowed_event_types(void)
{
return BIT(MLX5_EVENT_TYPE_DCT_DRAINED);
}
static bool is_event_type_allowed(int rsc_type, int event_type)
{
switch (rsc_type) {
case MLX5_EVENT_QUEUE_TYPE_QP:
return BIT(event_type) & qp_allowed_event_types();
case MLX5_EVENT_QUEUE_TYPE_RQ:
return BIT(event_type) & rq_allowed_event_types();
case MLX5_EVENT_QUEUE_TYPE_SQ:
return BIT(event_type) & sq_allowed_event_types();
case MLX5_EVENT_QUEUE_TYPE_DCT:
return BIT(event_type) & dct_allowed_event_types();
default:
WARN(1, "Event arrived for unknown resource type");
return false;
}
}
static int rsc_event_notifier(struct notifier_block *nb,
unsigned long type, void *data)
{
struct mlx5_core_rsc_common *common;
struct mlx5_qp_table *table;
struct mlx5_core_dct *dct;
u8 event_type = (u8)type;
struct mlx5_core_qp *qp;
struct mlx5_eqe *eqe;
u32 rsn;
switch (event_type) {
case MLX5_EVENT_TYPE_DCT_DRAINED:
eqe = data;
rsn = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
rsn |= (MLX5_RES_DCT << MLX5_USER_INDEX_LEN);
break;
case MLX5_EVENT_TYPE_PATH_MIG:
case MLX5_EVENT_TYPE_COMM_EST:
case MLX5_EVENT_TYPE_SQ_DRAINED:
case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
eqe = data;
rsn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
rsn |= (eqe->data.qp_srq.type << MLX5_USER_INDEX_LEN);
break;
default:
return NOTIFY_DONE;
}
table = container_of(nb, struct mlx5_qp_table, nb);
common = mlx5_get_rsc(table, rsn);
if (!common)
return NOTIFY_OK;
if (!is_event_type_allowed((rsn >> MLX5_USER_INDEX_LEN), event_type))
goto out;
switch (common->res) {
case MLX5_RES_QP:
case MLX5_RES_RQ:
case MLX5_RES_SQ:
qp = (struct mlx5_core_qp *)common;
qp->event(qp, event_type);
break;
case MLX5_RES_DCT:
dct = (struct mlx5_core_dct *)common;
if (event_type == MLX5_EVENT_TYPE_DCT_DRAINED)
complete(&dct->drained);
break;
default:
break;
}
out:
mlx5_core_put_rsc(common);
return NOTIFY_OK;
}
static int create_resource_common(struct mlx5_ib_dev *dev,
struct mlx5_core_qp *qp, int rsc_type)
{
struct mlx5_qp_table *table = &dev->qp_table;
int err;
qp->common.res = rsc_type;
spin_lock_irq(&table->lock);
err = radix_tree_insert(&table->tree,
qp->qpn | (rsc_type << MLX5_USER_INDEX_LEN),
qp);
spin_unlock_irq(&table->lock);
if (err)
return err;
refcount_set(&qp->common.refcount, 1);
init_completion(&qp->common.free);
qp->pid = current->pid;
return 0;
}
static void destroy_resource_common(struct mlx5_ib_dev *dev,
struct mlx5_core_qp *qp)
{
struct mlx5_qp_table *table = &dev->qp_table;
unsigned long flags;
spin_lock_irqsave(&table->lock, flags);
radix_tree_delete(&table->tree,
qp->qpn | (qp->common.res << MLX5_USER_INDEX_LEN));
spin_unlock_irqrestore(&table->lock, flags);
mlx5_core_put_rsc((struct mlx5_core_rsc_common *)qp);
wait_for_completion(&qp->common.free);
}
static int _mlx5_core_destroy_dct(struct mlx5_ib_dev *dev,
struct mlx5_core_dct *dct, bool need_cleanup)
{
u32 in[MLX5_ST_SZ_DW(destroy_dct_in)] = {};
struct mlx5_core_qp *qp = &dct->mqp;
int err;
err = mlx5_core_drain_dct(dev, dct);
if (err) {
if (dev->mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
goto destroy;
return err;
}
wait_for_completion(&dct->drained);
destroy:
if (need_cleanup)
destroy_resource_common(dev, &dct->mqp);
MLX5_SET(destroy_dct_in, in, opcode, MLX5_CMD_OP_DESTROY_DCT);
MLX5_SET(destroy_dct_in, in, dctn, qp->qpn);
MLX5_SET(destroy_dct_in, in, uid, qp->uid);
err =
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