/*
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* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/debugfs.h>
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#include <linux/mlx5/qp.h>
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#include <linux/mlx5/cq.h>
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#include <linux/mlx5/driver.h>
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#include "mlx5_core.h"
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#include "lib/eq.h"
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enum {
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QP_PID,
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QP_STATE,
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QP_XPORT,
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QP_MTU,
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QP_N_RECV,
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QP_RECV_SZ,
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QP_N_SEND,
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QP_LOG_PG_SZ,
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QP_RQPN,
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};
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static char *qp_fields[] = {
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[QP_PID] = "pid",
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[QP_STATE] = "state",
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[QP_XPORT] = "transport",
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[QP_MTU] = "mtu",
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[QP_N_RECV] = "num_recv",
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[QP_RECV_SZ] = "rcv_wqe_sz",
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[QP_N_SEND] = "num_send",
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[QP_LOG_PG_SZ] = "log2_page_sz",
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[QP_RQPN] = "remote_qpn",
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};
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enum {
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EQ_NUM_EQES,
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EQ_INTR,
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EQ_LOG_PG_SZ,
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};
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static char *eq_fields[] = {
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[EQ_NUM_EQES] = "num_eqes",
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[EQ_INTR] = "intr",
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[EQ_LOG_PG_SZ] = "log_page_size",
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};
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enum {
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CQ_PID,
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CQ_NUM_CQES,
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CQ_LOG_PG_SZ,
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};
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static char *cq_fields[] = {
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[CQ_PID] = "pid",
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[CQ_NUM_CQES] = "num_cqes",
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[CQ_LOG_PG_SZ] = "log_page_size",
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};
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struct dentry *mlx5_debugfs_root;
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EXPORT_SYMBOL(mlx5_debugfs_root);
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void mlx5_register_debugfs(void)
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{
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mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL);
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}
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void mlx5_unregister_debugfs(void)
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{
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debugfs_remove(mlx5_debugfs_root);
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}
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void mlx5_qp_debugfs_init(struct mlx5_core_dev *dev)
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{
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dev->priv.qp_debugfs = debugfs_create_dir("QPs", dev->priv.dbg_root);
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}
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EXPORT_SYMBOL(mlx5_qp_debugfs_init);
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void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev)
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{
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debugfs_remove_recursive(dev->priv.qp_debugfs);
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}
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EXPORT_SYMBOL(mlx5_qp_debugfs_cleanup);
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void mlx5_eq_debugfs_init(struct mlx5_core_dev *dev)
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{
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dev->priv.eq_debugfs = debugfs_create_dir("EQs", dev->priv.dbg_root);
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}
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void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev)
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{
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debugfs_remove_recursive(dev->priv.eq_debugfs);
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}
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static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
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loff_t *pos)
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{
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struct mlx5_cmd_stats *stats;
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u64 field = 0;
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int ret;
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char tbuf[22];
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stats = filp->private_data;
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spin_lock_irq(&stats->lock);
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if (stats->n)
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field = div64_u64(stats->sum, stats->n);
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spin_unlock_irq(&stats->lock);
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ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
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return simple_read_from_buffer(buf, count, pos, tbuf, ret);
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}
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static ssize_t average_write(struct file *filp, const char __user *buf,
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size_t count, loff_t *pos)
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{
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struct mlx5_cmd_stats *stats;
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stats = filp->private_data;
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spin_lock_irq(&stats->lock);
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stats->sum = 0;
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stats->n = 0;
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spin_unlock_irq(&stats->lock);
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*pos += count;
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return count;
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}
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static const struct file_operations stats_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = average_read,
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.write = average_write,
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};
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void mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev)
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{
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struct mlx5_cmd_stats *stats;
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struct dentry **cmd;
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const char *namep;
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int i;
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cmd = &dev->priv.cmdif_debugfs;
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*cmd = debugfs_create_dir("commands", dev->priv.dbg_root);
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for (i = 0; i < MLX5_CMD_OP_MAX; i++) {
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stats = &dev->cmd.stats[i];
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namep = mlx5_command_str(i);
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if (strcmp(namep, "unknown command opcode")) {
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stats->root = debugfs_create_dir(namep, *cmd);
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debugfs_create_file("average", 0400, stats->root, stats,
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&stats_fops);
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debugfs_create_u64("n", 0400, stats->root, &stats->n);
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}
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}
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}
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void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev)
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{
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debugfs_remove_recursive(dev->priv.cmdif_debugfs);
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}
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void mlx5_cq_debugfs_init(struct mlx5_core_dev *dev)
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{
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dev->priv.cq_debugfs = debugfs_create_dir("CQs", dev->priv.dbg_root);
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}
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void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev)
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{
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debugfs_remove_recursive(dev->priv.cq_debugfs);
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}
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static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp,
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int index, int *is_str)
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{
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int outlen = MLX5_ST_SZ_BYTES(query_qp_out);
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u32 in[MLX5_ST_SZ_DW(query_qp_in)] = {};
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u64 param = 0;
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u32 *out;
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int state;
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u32 *qpc;
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int err;
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out = kzalloc(outlen, GFP_KERNEL);
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if (!out)
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return 0;
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MLX5_SET(query_qp_in, in, opcode, MLX5_CMD_OP_QUERY_QP);
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MLX5_SET(query_qp_in, in, qpn, qp->qpn);
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err = mlx5_cmd_exec_inout(dev, query_qp, in, out);
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if (err)
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goto out;
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*is_str = 0;
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qpc = MLX5_ADDR_OF(query_qp_out, out, qpc);
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switch (index) {
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case QP_PID:
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param = qp->pid;
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break;
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case QP_STATE:
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state = MLX5_GET(qpc, qpc, state);
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param = (unsigned long)mlx5_qp_state_str(state);
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*is_str = 1;
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break;
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case QP_XPORT:
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param = (unsigned long)mlx5_qp_type_str(MLX5_GET(qpc, qpc, st));
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*is_str = 1;
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break;
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case QP_MTU:
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switch (MLX5_GET(qpc, qpc, mtu)) {
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case IB_MTU_256:
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param = 256;
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break;
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case IB_MTU_512:
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param = 512;
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break;
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case IB_MTU_1024:
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param = 1024;
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break;
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case IB_MTU_2048:
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param = 2048;
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break;
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case IB_MTU_4096:
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param = 4096;
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break;
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default:
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param = 0;
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}
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break;
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case QP_N_RECV:
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param = 1 << MLX5_GET(qpc, qpc, log_rq_size);
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break;
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case QP_RECV_SZ:
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param = 1 << (MLX5_GET(qpc, qpc, log_rq_stride) + 4);
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break;
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case QP_N_SEND:
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if (!MLX5_GET(qpc, qpc, no_sq))
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param = 1 << MLX5_GET(qpc, qpc, log_sq_size);
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break;
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case QP_LOG_PG_SZ:
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param = MLX5_GET(qpc, qpc, log_page_size) + 12;
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break;
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case QP_RQPN:
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param = MLX5_GET(qpc, qpc, remote_qpn);
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break;
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}
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out:
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kfree(out);
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return param;
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}
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static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
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int index)
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{
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int outlen = MLX5_ST_SZ_BYTES(query_eq_out);
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u32 in[MLX5_ST_SZ_DW(query_eq_in)] = {};
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u64 param = 0;
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void *ctx;
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u32 *out;
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int err;
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out = kzalloc(outlen, GFP_KERNEL);
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if (!out)
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return param;
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MLX5_SET(query_eq_in, in, opcode, MLX5_CMD_OP_QUERY_EQ);
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MLX5_SET(query_eq_in, in, eq_number, eq->eqn);
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err = mlx5_cmd_exec_inout(dev, query_eq, in, out);
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if (err) {
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mlx5_core_warn(dev, "failed to query eq\n");
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goto out;
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}
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ctx = MLX5_ADDR_OF(query_eq_out, out, eq_context_entry);
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switch (index) {
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case EQ_NUM_EQES:
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param = 1 << MLX5_GET(eqc, ctx, log_eq_size);
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break;
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case EQ_INTR:
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param = MLX5_GET(eqc, ctx, intr);
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break;
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case EQ_LOG_PG_SZ:
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param = MLX5_GET(eqc, ctx, log_page_size) + 12;
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break;
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}
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out:
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kfree(out);
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return param;
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}
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static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
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int index)
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{
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int outlen = MLX5_ST_SZ_BYTES(query_cq_out);
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u64 param = 0;
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void *ctx;
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u32 *out;
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int err;
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out = kvzalloc(outlen, GFP_KERNEL);
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if (!out)
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return param;
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err = mlx5_core_query_cq(dev, cq, out);
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if (err) {
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mlx5_core_warn(dev, "failed to query cq\n");
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goto out;
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}
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ctx = MLX5_ADDR_OF(query_cq_out, out, cq_context);
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switch (index) {
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case CQ_PID:
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param = cq->pid;
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break;
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case CQ_NUM_CQES:
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param = 1 << MLX5_GET(cqc, ctx, log_cq_size);
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break;
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case CQ_LOG_PG_SZ:
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param = MLX5_GET(cqc, ctx, log_page_size);
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break;
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}
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out:
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kvfree(out);
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return param;
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}
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static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
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loff_t *pos)
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{
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struct mlx5_field_desc *desc;
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struct mlx5_rsc_debug *d;
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char tbuf[18];
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int is_str = 0;
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u64 field;
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int ret;
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desc = filp->private_data;
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d = (void *)(desc - desc->i) - sizeof(*d);
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switch (d->type) {
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case MLX5_DBG_RSC_QP:
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field = qp_read_field(d->dev, d->object, desc->i, &is_str);
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break;
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case MLX5_DBG_RSC_EQ:
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field = eq_read_field(d->dev, d->object, desc->i);
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break;
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case MLX5_DBG_RSC_CQ:
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field = cq_read_field(d->dev, d->object, desc->i);
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break;
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default:
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mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type);
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return -EINVAL;
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}
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if (is_str)
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ret = snprintf(tbuf, sizeof(tbuf), "%s\n", (const char *)(unsigned long)field);
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else
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ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
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return simple_read_from_buffer(buf, count, pos, tbuf, ret);
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}
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static const struct file_operations fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = dbg_read,
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};
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static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type,
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struct dentry *root, struct mlx5_rsc_debug **dbg,
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int rsn, char **field, int nfile, void *data)
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{
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struct mlx5_rsc_debug *d;
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char resn[32];
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int i;
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d = kzalloc(struct_size(d, fields, nfile), GFP_KERNEL);
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if (!d)
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return -ENOMEM;
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d->dev = dev;
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d->object = data;
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d->type = type;
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sprintf(resn, "0x%x", rsn);
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d->root = debugfs_create_dir(resn, root);
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for (i = 0; i < nfile; i++) {
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d->fields[i].i = i;
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debugfs_create_file(field[i], 0400, d->root, &d->fields[i],
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&fops);
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}
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*dbg = d;
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return 0;
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}
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static void rem_res_tree(struct mlx5_rsc_debug *d)
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{
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debugfs_remove_recursive(d->root);
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kfree(d);
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}
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int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
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{
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int err;
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if (!mlx5_debugfs_root)
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return 0;
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err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs,
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&qp->dbg, qp->qpn, qp_fields,
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ARRAY_SIZE(qp_fields), qp);
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if (err)
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qp->dbg = NULL;
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return err;
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}
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EXPORT_SYMBOL(mlx5_debug_qp_add);
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void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
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{
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if (!mlx5_debugfs_root)
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return;
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if (qp->dbg)
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rem_res_tree(qp->dbg);
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}
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EXPORT_SYMBOL(mlx5_debug_qp_remove);
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int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
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{
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int err;
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if (!mlx5_debugfs_root)
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return 0;
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err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs,
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&eq->dbg, eq->eqn, eq_fields,
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ARRAY_SIZE(eq_fields), eq);
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if (err)
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eq->dbg = NULL;
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return err;
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}
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void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
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{
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if (!mlx5_debugfs_root)
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return;
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if (eq->dbg)
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rem_res_tree(eq->dbg);
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}
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int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
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{
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int err;
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if (!mlx5_debugfs_root)
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return 0;
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err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs,
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&cq->dbg, cq->cqn, cq_fields,
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ARRAY_SIZE(cq_fields), cq);
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if (err)
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cq->dbg = NULL;
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return err;
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}
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void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
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{
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if (!mlx5_debugfs_root)
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return;
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if (cq->dbg) {
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rem_res_tree(cq->dbg);
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cq->dbg = NULL;
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}
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}
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