/* * Copyright (c) 2013-2015, Mellanox Technologies. 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 #include #include #include #include #include "mlx5_core.h" enum { QP_PID, QP_STATE, QP_XPORT, QP_MTU, QP_N_RECV, QP_RECV_SZ, QP_N_SEND, QP_LOG_PG_SZ, QP_RQPN, }; static char *qp_fields[] = { [QP_PID] = "pid", [QP_STATE] = "state", [QP_XPORT] = "transport", [QP_MTU] = "mtu", [QP_N_RECV] = "num_recv", [QP_RECV_SZ] = "rcv_wqe_sz", [QP_N_SEND] = "num_send", [QP_LOG_PG_SZ] = "log2_page_sz", [QP_RQPN] = "remote_qpn", }; enum { EQ_NUM_EQES, EQ_INTR, EQ_LOG_PG_SZ, }; static char *eq_fields[] = { [EQ_NUM_EQES] = "num_eqes", [EQ_INTR] = "intr", [EQ_LOG_PG_SZ] = "log_page_size", }; enum { CQ_PID, CQ_NUM_CQES, CQ_LOG_PG_SZ, }; static char *cq_fields[] = { [CQ_PID] = "pid", [CQ_NUM_CQES] = "num_cqes", [CQ_LOG_PG_SZ] = "log_page_size", }; struct dentry *mlx5_debugfs_root; EXPORT_SYMBOL(mlx5_debugfs_root); void mlx5_register_debugfs(void) { mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL); if (IS_ERR_OR_NULL(mlx5_debugfs_root)) mlx5_debugfs_root = NULL; } void mlx5_unregister_debugfs(void) { debugfs_remove(mlx5_debugfs_root); } int mlx5_qp_debugfs_init(struct mlx5_core_dev *dev) { if (!mlx5_debugfs_root) return 0; atomic_set(&dev->num_qps, 0); dev->priv.qp_debugfs = debugfs_create_dir("QPs", dev->priv.dbg_root); if (!dev->priv.qp_debugfs) return -ENOMEM; return 0; } void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev) { if (!mlx5_debugfs_root) return; debugfs_remove_recursive(dev->priv.qp_debugfs); } int mlx5_eq_debugfs_init(struct mlx5_core_dev *dev) { if (!mlx5_debugfs_root) return 0; dev->priv.eq_debugfs = debugfs_create_dir("EQs", dev->priv.dbg_root); if (!dev->priv.eq_debugfs) return -ENOMEM; return 0; } void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev) { if (!mlx5_debugfs_root) return; debugfs_remove_recursive(dev->priv.eq_debugfs); } static ssize_t average_read(struct file *filp, char __user *buf, size_t count, loff_t *pos) { struct mlx5_cmd_stats *stats; u64 field = 0; int ret; char tbuf[22]; stats = filp->private_data; spin_lock_irq(&stats->lock); if (stats->n) field = div64_u64(stats->sum, stats->n); spin_unlock_irq(&stats->lock); ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field); return simple_read_from_buffer(buf, count, pos, tbuf, ret); } static ssize_t average_write(struct file *filp, const char __user *buf, size_t count, loff_t *pos) { struct mlx5_cmd_stats *stats; stats = filp->private_data; spin_lock_irq(&stats->lock); stats->sum = 0; stats->n = 0; spin_unlock_irq(&stats->lock); *pos += count; return count; } static const struct file_operations stats_fops = { .owner = THIS_MODULE, .open = simple_open, .read = average_read, .write = average_write, }; int mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev) { struct mlx5_cmd_stats *stats; struct dentry **cmd; const char *namep; int err; int i; if (!mlx5_debugfs_root) return 0; cmd = &dev->priv.cmdif_debugfs; *cmd = debugfs_create_dir("commands", dev->priv.dbg_root); if (!*cmd) return -ENOMEM; for (i = 0; i < ARRAY_SIZE(dev->cmd.stats); i++) { stats = &dev->cmd.stats[i]; namep = mlx5_command_str(i); if (strcmp(namep, "unknown command opcode")) { stats->root = debugfs_create_dir(namep, *cmd); if (!stats->root) { mlx5_core_warn(dev, "failed adding command %d\n", i); err = -ENOMEM; goto out; } stats->avg = debugfs_create_file("average", 0400, stats->root, stats, &stats_fops); if (!stats->avg) { mlx5_core_warn(dev, "failed creating debugfs file\n"); err = -ENOMEM; goto out; } stats->count = debugfs_create_u64("n", 0400, stats->root, &stats->n); if (!stats->count) { mlx5_core_warn(dev, "failed creating debugfs file\n"); err = -ENOMEM; goto out; } } } return 0; out: debugfs_remove_recursive(dev->priv.cmdif_debugfs); return err; } void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev) { if (!mlx5_debugfs_root) return; debugfs_remove_recursive(dev->priv.cmdif_debugfs); } int mlx5_cq_debugfs_init(struct mlx5_core_dev *dev) { if (!mlx5_debugfs_root) return 0; dev->priv.cq_debugfs = debugfs_create_dir("CQs", dev->priv.dbg_root); if (!dev->priv.cq_debugfs) return -ENOMEM; return 0; } void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev) { if (!mlx5_debugfs_root) return; debugfs_remove_recursive(dev->priv.cq_debugfs); } static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, int index, int *is_str) { int outlen = MLX5_ST_SZ_BYTES(query_qp_out); struct mlx5_qp_context *ctx; u64 param = 0; u32 *out; int err; int no_sq; out = kzalloc(outlen, GFP_KERNEL); if (!out) return param; err = mlx5_core_qp_query(dev, qp, out, outlen); if (err) { mlx5_core_warn(dev, "failed to query qp err=%d\n", err); goto out; } *is_str = 0; /* FIXME: use MLX5_GET rather than mlx5_qp_context manual struct */ ctx = (struct mlx5_qp_context *)MLX5_ADDR_OF(query_qp_out, out, qpc); switch (index) { case QP_PID: param = qp->pid; break; case QP_STATE: param = (unsigned long)mlx5_qp_state_str(be32_to_cpu(ctx->flags) >> 28); *is_str = 1; break; case QP_XPORT: param = (unsigned long)mlx5_qp_type_str((be32_to_cpu(ctx->flags) >> 16) & 0xff); *is_str = 1; break; case QP_MTU: switch (ctx->mtu_msgmax >> 5) { case IB_MTU_256: param = 256; break; case IB_MTU_512: param = 512; break; case IB_MTU_1024: param = 1024; break; case IB_MTU_2048: param = 2048; break; case IB_MTU_4096: param = 4096; break; default: param = 0; } break; case QP_N_RECV: param = 1 << ((ctx->rq_size_stride >> 3) & 0xf); break; case QP_RECV_SZ: param = 1 << ((ctx->rq_size_stride & 7) + 4); break; case QP_N_SEND: no_sq = be16_to_cpu(ctx->sq_crq_size) >> 15; if (!no_sq) param = 1 << (be16_to_cpu(ctx->sq_crq_size) >> 11); else param = 0; break; case QP_LOG_PG_SZ: param = (be32_to_cpu(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f; param += 12; break; case QP_RQPN: param = be32_to_cpu(ctx->log_pg_sz_remote_qpn) & 0xffffff; break; } out: kfree(out); return param; } static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq, int index) { int outlen = MLX5_ST_SZ_BYTES(query_eq_out); u64 param = 0; void *ctx; u32 *out; int err; out = kzalloc(outlen, GFP_KERNEL); if (!out) return param; err = mlx5_core_eq_query(dev, eq, out, outlen); if (err) { mlx5_core_warn(dev, "failed to query eq\n"); goto out; } ctx = MLX5_ADDR_OF(query_eq_out, out, eq_context_entry); switch (index) { case EQ_NUM_EQES: param = 1 << MLX5_GET(eqc, ctx, log_eq_size); break; case EQ_INTR: param = MLX5_GET(eqc, ctx, intr); break; case EQ_LOG_PG_SZ: param = MLX5_GET(eqc, ctx, log_page_size) + 12; break; } out: kfree(out); return param; } static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, int index) { int outlen = MLX5_ST_SZ_BYTES(query_cq_out); u64 param = 0; void *ctx; u32 *out; int err; out = kvzalloc(outlen, GFP_KERNEL); if (!out) return param; err = mlx5_core_query_cq(dev, cq, out, outlen); if (err) { mlx5_core_warn(dev, "failed to query cq\n"); goto out; } ctx = MLX5_ADDR_OF(query_cq_out, out, cq_context); switch (index) { case CQ_PID: param = cq->pid; break; case CQ_NUM_CQES: param = 1 << MLX5_GET(cqc, ctx, log_cq_size); break; case CQ_LOG_PG_SZ: param = MLX5_GET(cqc, ctx, log_page_size); break; } out: kvfree(out); return param; } static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count, loff_t *pos) { struct mlx5_field_desc *desc; struct mlx5_rsc_debug *d; char tbuf[18]; int is_str = 0; u64 field; int ret; desc = filp->private_data; d = (void *)(desc - desc->i) - sizeof(*d); switch (d->type) { case MLX5_DBG_RSC_QP: field = qp_read_field(d->dev, d->object, desc->i, &is_str); break; case MLX5_DBG_RSC_EQ: field = eq_read_field(d->dev, d->object, desc->i); break; case MLX5_DBG_RSC_CQ: field = cq_read_field(d->dev, d->object, desc->i); break; default: mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type); return -EINVAL; } if (is_str) ret = snprintf(tbuf, sizeof(tbuf), "%s\n", (const char *)(unsigned long)field); else ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field); return simple_read_from_buffer(buf, count, pos, tbuf, ret); } static const struct file_operations fops = { .owner = THIS_MODULE, .open = simple_open, .read = dbg_read, }; static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type, struct dentry *root, struct mlx5_rsc_debug **dbg, int rsn, char **field, int nfile, void *data) { struct mlx5_rsc_debug *d; char resn[32]; int err; int i; d = kzalloc(struct_size(d, fields, nfile), GFP_KERNEL); if (!d) return -ENOMEM; d->dev = dev; d->object = data; d->type = type; sprintf(resn, "0x%x", rsn); d->root = debugfs_create_dir(resn, root); if (!d->root) { err = -ENOMEM; goto out_free; } for (i = 0; i < nfile; i++) { d->fields[i].i = i; d->fields[i].dent = debugfs_create_file(field[i], 0400, d->root, &d->fields[i], &fops); if (!d->fields[i].dent) { err = -ENOMEM; goto out_rem; } } *dbg = d; return 0; out_rem: debugfs_remove_recursive(d->root); out_free: kfree(d); return err; } static void rem_res_tree(struct mlx5_rsc_debug *d) { debugfs_remove_recursive(d->root); kfree(d); } int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) { int err; if (!mlx5_debugfs_root) return 0; err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs, &qp->dbg, qp->qpn, qp_fields, ARRAY_SIZE(qp_fields), qp); if (err) qp->dbg = NULL; return err; } void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) { if (!mlx5_debugfs_root) return; if (qp->dbg) rem_res_tree(qp->dbg); } int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq) { int err; if (!mlx5_debugfs_root) return 0; err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs, &eq->dbg, eq->eqn, eq_fields, ARRAY_SIZE(eq_fields), eq); if (err) eq->dbg = NULL; return err; } void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq) { if (!mlx5_debugfs_root) return; if (eq->dbg) rem_res_tree(eq->dbg); } int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) { int err; if (!mlx5_debugfs_root) return 0; err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs, &cq->dbg, cq->cqn, cq_fields, ARRAY_SIZE(cq_fields), cq); if (err) cq->dbg = NULL; return err; } void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) { if (!mlx5_debugfs_root) return; if (cq->dbg) rem_res_tree(cq->dbg); }