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1573 lines
43 KiB
1573 lines
43 KiB
/* |
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* Copyright (c) 2009-2010 Chelsio, Inc. 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/moduleparam.h> |
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#include <linux/debugfs.h> |
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#include <linux/vmalloc.h> |
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#include <linux/math64.h> |
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|
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#include <rdma/ib_verbs.h> |
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|
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#include "iw_cxgb4.h" |
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|
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#define DRV_VERSION "0.1" |
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|
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MODULE_AUTHOR("Steve Wise"); |
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MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver"); |
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MODULE_LICENSE("Dual BSD/GPL"); |
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|
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static int allow_db_fc_on_t5; |
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module_param(allow_db_fc_on_t5, int, 0644); |
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MODULE_PARM_DESC(allow_db_fc_on_t5, |
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"Allow DB Flow Control on T5 (default = 0)"); |
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|
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static int allow_db_coalescing_on_t5; |
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module_param(allow_db_coalescing_on_t5, int, 0644); |
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MODULE_PARM_DESC(allow_db_coalescing_on_t5, |
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"Allow DB Coalescing on T5 (default = 0)"); |
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|
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int c4iw_wr_log = 0; |
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module_param(c4iw_wr_log, int, 0444); |
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MODULE_PARM_DESC(c4iw_wr_log, "Enables logging of work request timing data."); |
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|
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static int c4iw_wr_log_size_order = 12; |
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module_param(c4iw_wr_log_size_order, int, 0444); |
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MODULE_PARM_DESC(c4iw_wr_log_size_order, |
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"Number of entries (log2) in the work request timing log."); |
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|
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static LIST_HEAD(uld_ctx_list); |
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static DEFINE_MUTEX(dev_mutex); |
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static struct workqueue_struct *reg_workq; |
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|
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#define DB_FC_RESUME_SIZE 64 |
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#define DB_FC_RESUME_DELAY 1 |
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#define DB_FC_DRAIN_THRESH 0 |
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|
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static struct dentry *c4iw_debugfs_root; |
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|
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struct c4iw_debugfs_data { |
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struct c4iw_dev *devp; |
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char *buf; |
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int bufsize; |
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int pos; |
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}; |
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|
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static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count, |
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loff_t *ppos) |
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{ |
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struct c4iw_debugfs_data *d = file->private_data; |
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|
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return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos); |
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} |
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|
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void c4iw_log_wr_stats(struct t4_wq *wq, struct t4_cqe *cqe) |
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{ |
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struct wr_log_entry le; |
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int idx; |
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|
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if (!wq->rdev->wr_log) |
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return; |
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|
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idx = (atomic_inc_return(&wq->rdev->wr_log_idx) - 1) & |
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(wq->rdev->wr_log_size - 1); |
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le.poll_sge_ts = cxgb4_read_sge_timestamp(wq->rdev->lldi.ports[0]); |
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le.poll_host_time = ktime_get(); |
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le.valid = 1; |
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le.cqe_sge_ts = CQE_TS(cqe); |
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if (SQ_TYPE(cqe)) { |
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le.qid = wq->sq.qid; |
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le.opcode = CQE_OPCODE(cqe); |
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le.post_host_time = wq->sq.sw_sq[wq->sq.cidx].host_time; |
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le.post_sge_ts = wq->sq.sw_sq[wq->sq.cidx].sge_ts; |
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le.wr_id = CQE_WRID_SQ_IDX(cqe); |
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} else { |
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le.qid = wq->rq.qid; |
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le.opcode = FW_RI_RECEIVE; |
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le.post_host_time = wq->rq.sw_rq[wq->rq.cidx].host_time; |
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le.post_sge_ts = wq->rq.sw_rq[wq->rq.cidx].sge_ts; |
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le.wr_id = CQE_WRID_MSN(cqe); |
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} |
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wq->rdev->wr_log[idx] = le; |
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} |
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|
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static int wr_log_show(struct seq_file *seq, void *v) |
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{ |
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struct c4iw_dev *dev = seq->private; |
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ktime_t prev_time; |
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struct wr_log_entry *lep; |
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int prev_time_set = 0; |
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int idx, end; |
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|
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#define ts2ns(ts) div64_u64((ts) * dev->rdev.lldi.cclk_ps, 1000) |
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|
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idx = atomic_read(&dev->rdev.wr_log_idx) & |
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(dev->rdev.wr_log_size - 1); |
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end = idx - 1; |
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if (end < 0) |
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end = dev->rdev.wr_log_size - 1; |
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lep = &dev->rdev.wr_log[idx]; |
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while (idx != end) { |
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if (lep->valid) { |
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if (!prev_time_set) { |
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prev_time_set = 1; |
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prev_time = lep->poll_host_time; |
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} |
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seq_printf(seq, "%04u: nsec %llu qid %u opcode " |
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"%u %s 0x%x host_wr_delta nsec %llu " |
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"post_sge_ts 0x%llx cqe_sge_ts 0x%llx " |
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"poll_sge_ts 0x%llx post_poll_delta_ns %llu " |
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"cqe_poll_delta_ns %llu\n", |
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idx, |
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ktime_to_ns(ktime_sub(lep->poll_host_time, |
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prev_time)), |
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lep->qid, lep->opcode, |
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lep->opcode == FW_RI_RECEIVE ? |
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"msn" : "wrid", |
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lep->wr_id, |
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ktime_to_ns(ktime_sub(lep->poll_host_time, |
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lep->post_host_time)), |
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lep->post_sge_ts, lep->cqe_sge_ts, |
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lep->poll_sge_ts, |
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ts2ns(lep->poll_sge_ts - lep->post_sge_ts), |
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ts2ns(lep->poll_sge_ts - lep->cqe_sge_ts)); |
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prev_time = lep->poll_host_time; |
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} |
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idx++; |
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if (idx > (dev->rdev.wr_log_size - 1)) |
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idx = 0; |
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lep = &dev->rdev.wr_log[idx]; |
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} |
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#undef ts2ns |
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return 0; |
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} |
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|
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static int wr_log_open(struct inode *inode, struct file *file) |
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{ |
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return single_open(file, wr_log_show, inode->i_private); |
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} |
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|
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static ssize_t wr_log_clear(struct file *file, const char __user *buf, |
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size_t count, loff_t *pos) |
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{ |
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struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private; |
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int i; |
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|
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if (dev->rdev.wr_log) |
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for (i = 0; i < dev->rdev.wr_log_size; i++) |
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dev->rdev.wr_log[i].valid = 0; |
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return count; |
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} |
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|
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static const struct file_operations wr_log_debugfs_fops = { |
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.owner = THIS_MODULE, |
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.open = wr_log_open, |
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.release = single_release, |
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.read = seq_read, |
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.llseek = seq_lseek, |
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.write = wr_log_clear, |
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}; |
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|
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static struct sockaddr_in zero_sin = { |
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.sin_family = AF_INET, |
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}; |
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|
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static struct sockaddr_in6 zero_sin6 = { |
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.sin6_family = AF_INET6, |
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}; |
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|
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static void set_ep_sin_addrs(struct c4iw_ep *ep, |
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struct sockaddr_in **lsin, |
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struct sockaddr_in **rsin, |
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struct sockaddr_in **m_lsin, |
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struct sockaddr_in **m_rsin) |
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{ |
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struct iw_cm_id *id = ep->com.cm_id; |
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|
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*m_lsin = (struct sockaddr_in *)&ep->com.local_addr; |
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*m_rsin = (struct sockaddr_in *)&ep->com.remote_addr; |
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if (id) { |
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*lsin = (struct sockaddr_in *)&id->local_addr; |
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*rsin = (struct sockaddr_in *)&id->remote_addr; |
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} else { |
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*lsin = &zero_sin; |
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*rsin = &zero_sin; |
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} |
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} |
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|
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static void set_ep_sin6_addrs(struct c4iw_ep *ep, |
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struct sockaddr_in6 **lsin6, |
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struct sockaddr_in6 **rsin6, |
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struct sockaddr_in6 **m_lsin6, |
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struct sockaddr_in6 **m_rsin6) |
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{ |
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struct iw_cm_id *id = ep->com.cm_id; |
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|
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*m_lsin6 = (struct sockaddr_in6 *)&ep->com.local_addr; |
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*m_rsin6 = (struct sockaddr_in6 *)&ep->com.remote_addr; |
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if (id) { |
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*lsin6 = (struct sockaddr_in6 *)&id->local_addr; |
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*rsin6 = (struct sockaddr_in6 *)&id->remote_addr; |
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} else { |
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*lsin6 = &zero_sin6; |
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*rsin6 = &zero_sin6; |
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} |
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} |
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|
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static int dump_qp(unsigned long id, struct c4iw_qp *qp, |
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struct c4iw_debugfs_data *qpd) |
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{ |
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int space; |
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int cc; |
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if (id != qp->wq.sq.qid) |
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return 0; |
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|
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space = qpd->bufsize - qpd->pos - 1; |
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if (space == 0) |
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return 1; |
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|
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if (qp->ep) { |
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struct c4iw_ep *ep = qp->ep; |
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|
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if (ep->com.local_addr.ss_family == AF_INET) { |
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struct sockaddr_in *lsin; |
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struct sockaddr_in *rsin; |
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struct sockaddr_in *m_lsin; |
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struct sockaddr_in *m_rsin; |
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|
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set_ep_sin_addrs(ep, &lsin, &rsin, &m_lsin, &m_rsin); |
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cc = snprintf(qpd->buf + qpd->pos, space, |
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"rc qp sq id %u %s id %u state %u " |
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"onchip %u ep tid %u state %u " |
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"%pI4:%u/%u->%pI4:%u/%u\n", |
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qp->wq.sq.qid, qp->srq ? "srq" : "rq", |
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qp->srq ? qp->srq->idx : qp->wq.rq.qid, |
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(int)qp->attr.state, |
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qp->wq.sq.flags & T4_SQ_ONCHIP, |
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ep->hwtid, (int)ep->com.state, |
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&lsin->sin_addr, ntohs(lsin->sin_port), |
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ntohs(m_lsin->sin_port), |
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&rsin->sin_addr, ntohs(rsin->sin_port), |
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ntohs(m_rsin->sin_port)); |
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} else { |
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struct sockaddr_in6 *lsin6; |
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struct sockaddr_in6 *rsin6; |
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struct sockaddr_in6 *m_lsin6; |
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struct sockaddr_in6 *m_rsin6; |
|
|
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set_ep_sin6_addrs(ep, &lsin6, &rsin6, &m_lsin6, |
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&m_rsin6); |
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cc = snprintf(qpd->buf + qpd->pos, space, |
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"rc qp sq id %u rq id %u state %u " |
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"onchip %u ep tid %u state %u " |
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"%pI6:%u/%u->%pI6:%u/%u\n", |
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qp->wq.sq.qid, qp->wq.rq.qid, |
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(int)qp->attr.state, |
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qp->wq.sq.flags & T4_SQ_ONCHIP, |
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ep->hwtid, (int)ep->com.state, |
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&lsin6->sin6_addr, |
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ntohs(lsin6->sin6_port), |
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ntohs(m_lsin6->sin6_port), |
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&rsin6->sin6_addr, |
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ntohs(rsin6->sin6_port), |
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ntohs(m_rsin6->sin6_port)); |
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} |
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} else |
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cc = snprintf(qpd->buf + qpd->pos, space, |
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"qp sq id %u rq id %u state %u onchip %u\n", |
|
qp->wq.sq.qid, qp->wq.rq.qid, |
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(int)qp->attr.state, |
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qp->wq.sq.flags & T4_SQ_ONCHIP); |
|
if (cc < space) |
|
qpd->pos += cc; |
|
return 0; |
|
} |
|
|
|
static int qp_release(struct inode *inode, struct file *file) |
|
{ |
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struct c4iw_debugfs_data *qpd = file->private_data; |
|
if (!qpd) { |
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pr_info("%s null qpd?\n", __func__); |
|
return 0; |
|
} |
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vfree(qpd->buf); |
|
kfree(qpd); |
|
return 0; |
|
} |
|
|
|
static int qp_open(struct inode *inode, struct file *file) |
|
{ |
|
struct c4iw_qp *qp; |
|
struct c4iw_debugfs_data *qpd; |
|
unsigned long index; |
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int count = 1; |
|
|
|
qpd = kmalloc(sizeof(*qpd), GFP_KERNEL); |
|
if (!qpd) |
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return -ENOMEM; |
|
|
|
qpd->devp = inode->i_private; |
|
qpd->pos = 0; |
|
|
|
/* |
|
* No need to lock; we drop the lock to call vmalloc so it's racy |
|
* anyway. Someone who cares should switch this over to seq_file |
|
*/ |
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xa_for_each(&qpd->devp->qps, index, qp) |
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count++; |
|
|
|
qpd->bufsize = count * 180; |
|
qpd->buf = vmalloc(qpd->bufsize); |
|
if (!qpd->buf) { |
|
kfree(qpd); |
|
return -ENOMEM; |
|
} |
|
|
|
xa_lock_irq(&qpd->devp->qps); |
|
xa_for_each(&qpd->devp->qps, index, qp) |
|
dump_qp(index, qp, qpd); |
|
xa_unlock_irq(&qpd->devp->qps); |
|
|
|
qpd->buf[qpd->pos++] = 0; |
|
file->private_data = qpd; |
|
return 0; |
|
} |
|
|
|
static const struct file_operations qp_debugfs_fops = { |
|
.owner = THIS_MODULE, |
|
.open = qp_open, |
|
.release = qp_release, |
|
.read = debugfs_read, |
|
.llseek = default_llseek, |
|
}; |
|
|
|
static int dump_stag(unsigned long id, struct c4iw_debugfs_data *stagd) |
|
{ |
|
int space; |
|
int cc; |
|
struct fw_ri_tpte tpte; |
|
int ret; |
|
|
|
space = stagd->bufsize - stagd->pos - 1; |
|
if (space == 0) |
|
return 1; |
|
|
|
ret = cxgb4_read_tpte(stagd->devp->rdev.lldi.ports[0], (u32)id<<8, |
|
(__be32 *)&tpte); |
|
if (ret) { |
|
dev_err(&stagd->devp->rdev.lldi.pdev->dev, |
|
"%s cxgb4_read_tpte err %d\n", __func__, ret); |
|
return ret; |
|
} |
|
cc = snprintf(stagd->buf + stagd->pos, space, |
|
"stag: idx 0x%x valid %d key 0x%x state %d pdid %d " |
|
"perm 0x%x ps %d len 0x%llx va 0x%llx\n", |
|
(u32)id<<8, |
|
FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid)), |
|
FW_RI_TPTE_STAGKEY_G(ntohl(tpte.valid_to_pdid)), |
|
FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid)), |
|
FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid)), |
|
FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid)), |
|
FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid)), |
|
((u64)ntohl(tpte.len_hi) << 32) | ntohl(tpte.len_lo), |
|
((u64)ntohl(tpte.va_hi) << 32) | ntohl(tpte.va_lo_fbo)); |
|
if (cc < space) |
|
stagd->pos += cc; |
|
return 0; |
|
} |
|
|
|
static int stag_release(struct inode *inode, struct file *file) |
|
{ |
|
struct c4iw_debugfs_data *stagd = file->private_data; |
|
if (!stagd) { |
|
pr_info("%s null stagd?\n", __func__); |
|
return 0; |
|
} |
|
vfree(stagd->buf); |
|
kfree(stagd); |
|
return 0; |
|
} |
|
|
|
static int stag_open(struct inode *inode, struct file *file) |
|
{ |
|
struct c4iw_debugfs_data *stagd; |
|
void *p; |
|
unsigned long index; |
|
int ret = 0; |
|
int count = 1; |
|
|
|
stagd = kmalloc(sizeof(*stagd), GFP_KERNEL); |
|
if (!stagd) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
stagd->devp = inode->i_private; |
|
stagd->pos = 0; |
|
|
|
xa_for_each(&stagd->devp->mrs, index, p) |
|
count++; |
|
|
|
stagd->bufsize = count * 256; |
|
stagd->buf = vmalloc(stagd->bufsize); |
|
if (!stagd->buf) { |
|
ret = -ENOMEM; |
|
goto err1; |
|
} |
|
|
|
xa_lock_irq(&stagd->devp->mrs); |
|
xa_for_each(&stagd->devp->mrs, index, p) |
|
dump_stag(index, stagd); |
|
xa_unlock_irq(&stagd->devp->mrs); |
|
|
|
stagd->buf[stagd->pos++] = 0; |
|
file->private_data = stagd; |
|
goto out; |
|
err1: |
|
kfree(stagd); |
|
out: |
|
return ret; |
|
} |
|
|
|
static const struct file_operations stag_debugfs_fops = { |
|
.owner = THIS_MODULE, |
|
.open = stag_open, |
|
.release = stag_release, |
|
.read = debugfs_read, |
|
.llseek = default_llseek, |
|
}; |
|
|
|
static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"}; |
|
|
|
static int stats_show(struct seq_file *seq, void *v) |
|
{ |
|
struct c4iw_dev *dev = seq->private; |
|
|
|
seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current", |
|
"Max", "Fail"); |
|
seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n", |
|
dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur, |
|
dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail); |
|
seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n", |
|
dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur, |
|
dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail); |
|
seq_printf(seq, " SRQS: %10llu %10llu %10llu %10llu\n", |
|
dev->rdev.stats.srqt.total, dev->rdev.stats.srqt.cur, |
|
dev->rdev.stats.srqt.max, dev->rdev.stats.srqt.fail); |
|
seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n", |
|
dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur, |
|
dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail); |
|
seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n", |
|
dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur, |
|
dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail); |
|
seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n", |
|
dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur, |
|
dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail); |
|
seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n", |
|
dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur, |
|
dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail); |
|
seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full); |
|
seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty); |
|
seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop); |
|
seq_printf(seq, " DB State: %s Transitions %llu FC Interruptions %llu\n", |
|
db_state_str[dev->db_state], |
|
dev->rdev.stats.db_state_transitions, |
|
dev->rdev.stats.db_fc_interruptions); |
|
seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full); |
|
seq_printf(seq, "ACT_OFLD_CONN_FAILS: %10llu\n", |
|
dev->rdev.stats.act_ofld_conn_fails); |
|
seq_printf(seq, "PAS_OFLD_CONN_FAILS: %10llu\n", |
|
dev->rdev.stats.pas_ofld_conn_fails); |
|
seq_printf(seq, "NEG_ADV_RCVD: %10llu\n", dev->rdev.stats.neg_adv); |
|
seq_printf(seq, "AVAILABLE IRD: %10u\n", dev->avail_ird); |
|
return 0; |
|
} |
|
|
|
static int stats_open(struct inode *inode, struct file *file) |
|
{ |
|
return single_open(file, stats_show, inode->i_private); |
|
} |
|
|
|
static ssize_t stats_clear(struct file *file, const char __user *buf, |
|
size_t count, loff_t *pos) |
|
{ |
|
struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private; |
|
|
|
mutex_lock(&dev->rdev.stats.lock); |
|
dev->rdev.stats.pd.max = 0; |
|
dev->rdev.stats.pd.fail = 0; |
|
dev->rdev.stats.qid.max = 0; |
|
dev->rdev.stats.qid.fail = 0; |
|
dev->rdev.stats.stag.max = 0; |
|
dev->rdev.stats.stag.fail = 0; |
|
dev->rdev.stats.pbl.max = 0; |
|
dev->rdev.stats.pbl.fail = 0; |
|
dev->rdev.stats.rqt.max = 0; |
|
dev->rdev.stats.rqt.fail = 0; |
|
dev->rdev.stats.rqt.max = 0; |
|
dev->rdev.stats.rqt.fail = 0; |
|
dev->rdev.stats.ocqp.max = 0; |
|
dev->rdev.stats.ocqp.fail = 0; |
|
dev->rdev.stats.db_full = 0; |
|
dev->rdev.stats.db_empty = 0; |
|
dev->rdev.stats.db_drop = 0; |
|
dev->rdev.stats.db_state_transitions = 0; |
|
dev->rdev.stats.tcam_full = 0; |
|
dev->rdev.stats.act_ofld_conn_fails = 0; |
|
dev->rdev.stats.pas_ofld_conn_fails = 0; |
|
mutex_unlock(&dev->rdev.stats.lock); |
|
return count; |
|
} |
|
|
|
static const struct file_operations stats_debugfs_fops = { |
|
.owner = THIS_MODULE, |
|
.open = stats_open, |
|
.release = single_release, |
|
.read = seq_read, |
|
.llseek = seq_lseek, |
|
.write = stats_clear, |
|
}; |
|
|
|
static int dump_ep(struct c4iw_ep *ep, struct c4iw_debugfs_data *epd) |
|
{ |
|
int space; |
|
int cc; |
|
|
|
space = epd->bufsize - epd->pos - 1; |
|
if (space == 0) |
|
return 1; |
|
|
|
if (ep->com.local_addr.ss_family == AF_INET) { |
|
struct sockaddr_in *lsin; |
|
struct sockaddr_in *rsin; |
|
struct sockaddr_in *m_lsin; |
|
struct sockaddr_in *m_rsin; |
|
|
|
set_ep_sin_addrs(ep, &lsin, &rsin, &m_lsin, &m_rsin); |
|
cc = snprintf(epd->buf + epd->pos, space, |
|
"ep %p cm_id %p qp %p state %d flags 0x%lx " |
|
"history 0x%lx hwtid %d atid %d " |
|
"conn_na %u abort_na %u " |
|
"%pI4:%d/%d <-> %pI4:%d/%d\n", |
|
ep, ep->com.cm_id, ep->com.qp, |
|
(int)ep->com.state, ep->com.flags, |
|
ep->com.history, ep->hwtid, ep->atid, |
|
ep->stats.connect_neg_adv, |
|
ep->stats.abort_neg_adv, |
|
&lsin->sin_addr, ntohs(lsin->sin_port), |
|
ntohs(m_lsin->sin_port), |
|
&rsin->sin_addr, ntohs(rsin->sin_port), |
|
ntohs(m_rsin->sin_port)); |
|
} else { |
|
struct sockaddr_in6 *lsin6; |
|
struct sockaddr_in6 *rsin6; |
|
struct sockaddr_in6 *m_lsin6; |
|
struct sockaddr_in6 *m_rsin6; |
|
|
|
set_ep_sin6_addrs(ep, &lsin6, &rsin6, &m_lsin6, &m_rsin6); |
|
cc = snprintf(epd->buf + epd->pos, space, |
|
"ep %p cm_id %p qp %p state %d flags 0x%lx " |
|
"history 0x%lx hwtid %d atid %d " |
|
"conn_na %u abort_na %u " |
|
"%pI6:%d/%d <-> %pI6:%d/%d\n", |
|
ep, ep->com.cm_id, ep->com.qp, |
|
(int)ep->com.state, ep->com.flags, |
|
ep->com.history, ep->hwtid, ep->atid, |
|
ep->stats.connect_neg_adv, |
|
ep->stats.abort_neg_adv, |
|
&lsin6->sin6_addr, ntohs(lsin6->sin6_port), |
|
ntohs(m_lsin6->sin6_port), |
|
&rsin6->sin6_addr, ntohs(rsin6->sin6_port), |
|
ntohs(m_rsin6->sin6_port)); |
|
} |
|
if (cc < space) |
|
epd->pos += cc; |
|
return 0; |
|
} |
|
|
|
static |
|
int dump_listen_ep(struct c4iw_listen_ep *ep, struct c4iw_debugfs_data *epd) |
|
{ |
|
int space; |
|
int cc; |
|
|
|
space = epd->bufsize - epd->pos - 1; |
|
if (space == 0) |
|
return 1; |
|
|
|
if (ep->com.local_addr.ss_family == AF_INET) { |
|
struct sockaddr_in *lsin = (struct sockaddr_in *) |
|
&ep->com.cm_id->local_addr; |
|
struct sockaddr_in *m_lsin = (struct sockaddr_in *) |
|
&ep->com.cm_id->m_local_addr; |
|
|
|
cc = snprintf(epd->buf + epd->pos, space, |
|
"ep %p cm_id %p state %d flags 0x%lx stid %d " |
|
"backlog %d %pI4:%d/%d\n", |
|
ep, ep->com.cm_id, (int)ep->com.state, |
|
ep->com.flags, ep->stid, ep->backlog, |
|
&lsin->sin_addr, ntohs(lsin->sin_port), |
|
ntohs(m_lsin->sin_port)); |
|
} else { |
|
struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *) |
|
&ep->com.cm_id->local_addr; |
|
struct sockaddr_in6 *m_lsin6 = (struct sockaddr_in6 *) |
|
&ep->com.cm_id->m_local_addr; |
|
|
|
cc = snprintf(epd->buf + epd->pos, space, |
|
"ep %p cm_id %p state %d flags 0x%lx stid %d " |
|
"backlog %d %pI6:%d/%d\n", |
|
ep, ep->com.cm_id, (int)ep->com.state, |
|
ep->com.flags, ep->stid, ep->backlog, |
|
&lsin6->sin6_addr, ntohs(lsin6->sin6_port), |
|
ntohs(m_lsin6->sin6_port)); |
|
} |
|
if (cc < space) |
|
epd->pos += cc; |
|
return 0; |
|
} |
|
|
|
static int ep_release(struct inode *inode, struct file *file) |
|
{ |
|
struct c4iw_debugfs_data *epd = file->private_data; |
|
if (!epd) { |
|
pr_info("%s null qpd?\n", __func__); |
|
return 0; |
|
} |
|
vfree(epd->buf); |
|
kfree(epd); |
|
return 0; |
|
} |
|
|
|
static int ep_open(struct inode *inode, struct file *file) |
|
{ |
|
struct c4iw_ep *ep; |
|
struct c4iw_listen_ep *lep; |
|
unsigned long index; |
|
struct c4iw_debugfs_data *epd; |
|
int ret = 0; |
|
int count = 1; |
|
|
|
epd = kmalloc(sizeof(*epd), GFP_KERNEL); |
|
if (!epd) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
epd->devp = inode->i_private; |
|
epd->pos = 0; |
|
|
|
xa_for_each(&epd->devp->hwtids, index, ep) |
|
count++; |
|
xa_for_each(&epd->devp->atids, index, ep) |
|
count++; |
|
xa_for_each(&epd->devp->stids, index, lep) |
|
count++; |
|
|
|
epd->bufsize = count * 240; |
|
epd->buf = vmalloc(epd->bufsize); |
|
if (!epd->buf) { |
|
ret = -ENOMEM; |
|
goto err1; |
|
} |
|
|
|
xa_lock_irq(&epd->devp->hwtids); |
|
xa_for_each(&epd->devp->hwtids, index, ep) |
|
dump_ep(ep, epd); |
|
xa_unlock_irq(&epd->devp->hwtids); |
|
xa_lock_irq(&epd->devp->atids); |
|
xa_for_each(&epd->devp->atids, index, ep) |
|
dump_ep(ep, epd); |
|
xa_unlock_irq(&epd->devp->atids); |
|
xa_lock_irq(&epd->devp->stids); |
|
xa_for_each(&epd->devp->stids, index, lep) |
|
dump_listen_ep(lep, epd); |
|
xa_unlock_irq(&epd->devp->stids); |
|
|
|
file->private_data = epd; |
|
goto out; |
|
err1: |
|
kfree(epd); |
|
out: |
|
return ret; |
|
} |
|
|
|
static const struct file_operations ep_debugfs_fops = { |
|
.owner = THIS_MODULE, |
|
.open = ep_open, |
|
.release = ep_release, |
|
.read = debugfs_read, |
|
}; |
|
|
|
static void setup_debugfs(struct c4iw_dev *devp) |
|
{ |
|
debugfs_create_file_size("qps", S_IWUSR, devp->debugfs_root, |
|
(void *)devp, &qp_debugfs_fops, 4096); |
|
|
|
debugfs_create_file_size("stags", S_IWUSR, devp->debugfs_root, |
|
(void *)devp, &stag_debugfs_fops, 4096); |
|
|
|
debugfs_create_file_size("stats", S_IWUSR, devp->debugfs_root, |
|
(void *)devp, &stats_debugfs_fops, 4096); |
|
|
|
debugfs_create_file_size("eps", S_IWUSR, devp->debugfs_root, |
|
(void *)devp, &ep_debugfs_fops, 4096); |
|
|
|
if (c4iw_wr_log) |
|
debugfs_create_file_size("wr_log", S_IWUSR, devp->debugfs_root, |
|
(void *)devp, &wr_log_debugfs_fops, 4096); |
|
} |
|
|
|
void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev, |
|
struct c4iw_dev_ucontext *uctx) |
|
{ |
|
struct list_head *pos, *nxt; |
|
struct c4iw_qid_list *entry; |
|
|
|
mutex_lock(&uctx->lock); |
|
list_for_each_safe(pos, nxt, &uctx->qpids) { |
|
entry = list_entry(pos, struct c4iw_qid_list, entry); |
|
list_del_init(&entry->entry); |
|
if (!(entry->qid & rdev->qpmask)) { |
|
c4iw_put_resource(&rdev->resource.qid_table, |
|
entry->qid); |
|
mutex_lock(&rdev->stats.lock); |
|
rdev->stats.qid.cur -= rdev->qpmask + 1; |
|
mutex_unlock(&rdev->stats.lock); |
|
} |
|
kfree(entry); |
|
} |
|
|
|
list_for_each_safe(pos, nxt, &uctx->cqids) { |
|
entry = list_entry(pos, struct c4iw_qid_list, entry); |
|
list_del_init(&entry->entry); |
|
kfree(entry); |
|
} |
|
mutex_unlock(&uctx->lock); |
|
} |
|
|
|
void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, |
|
struct c4iw_dev_ucontext *uctx) |
|
{ |
|
INIT_LIST_HEAD(&uctx->qpids); |
|
INIT_LIST_HEAD(&uctx->cqids); |
|
mutex_init(&uctx->lock); |
|
} |
|
|
|
/* Caller takes care of locking if needed */ |
|
static int c4iw_rdev_open(struct c4iw_rdev *rdev) |
|
{ |
|
int err; |
|
unsigned int factor; |
|
|
|
c4iw_init_dev_ucontext(rdev, &rdev->uctx); |
|
|
|
/* |
|
* This implementation assumes udb_density == ucq_density! Eventually |
|
* we might need to support this but for now fail the open. Also the |
|
* cqid and qpid range must match for now. |
|
*/ |
|
if (rdev->lldi.udb_density != rdev->lldi.ucq_density) { |
|
pr_err("%s: unsupported udb/ucq densities %u/%u\n", |
|
pci_name(rdev->lldi.pdev), rdev->lldi.udb_density, |
|
rdev->lldi.ucq_density); |
|
return -EINVAL; |
|
} |
|
if (rdev->lldi.vr->qp.start != rdev->lldi.vr->cq.start || |
|
rdev->lldi.vr->qp.size != rdev->lldi.vr->cq.size) { |
|
pr_err("%s: unsupported qp and cq id ranges qp start %u size %u cq start %u size %u\n", |
|
pci_name(rdev->lldi.pdev), rdev->lldi.vr->qp.start, |
|
rdev->lldi.vr->qp.size, rdev->lldi.vr->cq.size, |
|
rdev->lldi.vr->cq.size); |
|
return -EINVAL; |
|
} |
|
|
|
/* This implementation requires a sge_host_page_size <= PAGE_SIZE. */ |
|
if (rdev->lldi.sge_host_page_size > PAGE_SIZE) { |
|
pr_err("%s: unsupported sge host page size %u\n", |
|
pci_name(rdev->lldi.pdev), |
|
rdev->lldi.sge_host_page_size); |
|
return -EINVAL; |
|
} |
|
|
|
factor = PAGE_SIZE / rdev->lldi.sge_host_page_size; |
|
rdev->qpmask = (rdev->lldi.udb_density * factor) - 1; |
|
rdev->cqmask = (rdev->lldi.ucq_density * factor) - 1; |
|
|
|
pr_debug("dev %s stag start 0x%0x size 0x%0x num stags %d pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x qp qid start %u size %u cq qid start %u size %u srq size %u\n", |
|
pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start, |
|
rdev->lldi.vr->stag.size, c4iw_num_stags(rdev), |
|
rdev->lldi.vr->pbl.start, |
|
rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start, |
|
rdev->lldi.vr->rq.size, |
|
rdev->lldi.vr->qp.start, |
|
rdev->lldi.vr->qp.size, |
|
rdev->lldi.vr->cq.start, |
|
rdev->lldi.vr->cq.size, |
|
rdev->lldi.vr->srq.size); |
|
pr_debug("udb %pR db_reg %p gts_reg %p qpmask 0x%x cqmask 0x%x\n", |
|
&rdev->lldi.pdev->resource[2], |
|
rdev->lldi.db_reg, rdev->lldi.gts_reg, |
|
rdev->qpmask, rdev->cqmask); |
|
|
|
if (c4iw_num_stags(rdev) == 0) |
|
return -EINVAL; |
|
|
|
rdev->stats.pd.total = T4_MAX_NUM_PD; |
|
rdev->stats.stag.total = rdev->lldi.vr->stag.size; |
|
rdev->stats.pbl.total = rdev->lldi.vr->pbl.size; |
|
rdev->stats.rqt.total = rdev->lldi.vr->rq.size; |
|
rdev->stats.srqt.total = rdev->lldi.vr->srq.size; |
|
rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size; |
|
rdev->stats.qid.total = rdev->lldi.vr->qp.size; |
|
|
|
err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), |
|
T4_MAX_NUM_PD, rdev->lldi.vr->srq.size); |
|
if (err) { |
|
pr_err("error %d initializing resources\n", err); |
|
return err; |
|
} |
|
err = c4iw_pblpool_create(rdev); |
|
if (err) { |
|
pr_err("error %d initializing pbl pool\n", err); |
|
goto destroy_resource; |
|
} |
|
err = c4iw_rqtpool_create(rdev); |
|
if (err) { |
|
pr_err("error %d initializing rqt pool\n", err); |
|
goto destroy_pblpool; |
|
} |
|
err = c4iw_ocqp_pool_create(rdev); |
|
if (err) { |
|
pr_err("error %d initializing ocqp pool\n", err); |
|
goto destroy_rqtpool; |
|
} |
|
rdev->status_page = (struct t4_dev_status_page *) |
|
__get_free_page(GFP_KERNEL); |
|
if (!rdev->status_page) { |
|
err = -ENOMEM; |
|
goto destroy_ocqp_pool; |
|
} |
|
rdev->status_page->qp_start = rdev->lldi.vr->qp.start; |
|
rdev->status_page->qp_size = rdev->lldi.vr->qp.size; |
|
rdev->status_page->cq_start = rdev->lldi.vr->cq.start; |
|
rdev->status_page->cq_size = rdev->lldi.vr->cq.size; |
|
rdev->status_page->write_cmpl_supported = rdev->lldi.write_cmpl_support; |
|
|
|
if (c4iw_wr_log) { |
|
rdev->wr_log = kcalloc(1 << c4iw_wr_log_size_order, |
|
sizeof(*rdev->wr_log), |
|
GFP_KERNEL); |
|
if (rdev->wr_log) { |
|
rdev->wr_log_size = 1 << c4iw_wr_log_size_order; |
|
atomic_set(&rdev->wr_log_idx, 0); |
|
} |
|
} |
|
|
|
rdev->free_workq = create_singlethread_workqueue("iw_cxgb4_free"); |
|
if (!rdev->free_workq) { |
|
err = -ENOMEM; |
|
goto err_free_status_page_and_wr_log; |
|
} |
|
|
|
rdev->status_page->db_off = 0; |
|
|
|
init_completion(&rdev->rqt_compl); |
|
init_completion(&rdev->pbl_compl); |
|
kref_init(&rdev->rqt_kref); |
|
kref_init(&rdev->pbl_kref); |
|
|
|
return 0; |
|
err_free_status_page_and_wr_log: |
|
if (c4iw_wr_log && rdev->wr_log) |
|
kfree(rdev->wr_log); |
|
free_page((unsigned long)rdev->status_page); |
|
destroy_ocqp_pool: |
|
c4iw_ocqp_pool_destroy(rdev); |
|
destroy_rqtpool: |
|
c4iw_rqtpool_destroy(rdev); |
|
destroy_pblpool: |
|
c4iw_pblpool_destroy(rdev); |
|
destroy_resource: |
|
c4iw_destroy_resource(&rdev->resource); |
|
return err; |
|
} |
|
|
|
static void c4iw_rdev_close(struct c4iw_rdev *rdev) |
|
{ |
|
kfree(rdev->wr_log); |
|
c4iw_release_dev_ucontext(rdev, &rdev->uctx); |
|
free_page((unsigned long)rdev->status_page); |
|
c4iw_pblpool_destroy(rdev); |
|
c4iw_rqtpool_destroy(rdev); |
|
wait_for_completion(&rdev->pbl_compl); |
|
wait_for_completion(&rdev->rqt_compl); |
|
c4iw_ocqp_pool_destroy(rdev); |
|
destroy_workqueue(rdev->free_workq); |
|
c4iw_destroy_resource(&rdev->resource); |
|
} |
|
|
|
void c4iw_dealloc(struct uld_ctx *ctx) |
|
{ |
|
c4iw_rdev_close(&ctx->dev->rdev); |
|
WARN_ON(!xa_empty(&ctx->dev->cqs)); |
|
WARN_ON(!xa_empty(&ctx->dev->qps)); |
|
WARN_ON(!xa_empty(&ctx->dev->mrs)); |
|
wait_event(ctx->dev->wait, xa_empty(&ctx->dev->hwtids)); |
|
WARN_ON(!xa_empty(&ctx->dev->stids)); |
|
WARN_ON(!xa_empty(&ctx->dev->atids)); |
|
if (ctx->dev->rdev.bar2_kva) |
|
iounmap(ctx->dev->rdev.bar2_kva); |
|
if (ctx->dev->rdev.oc_mw_kva) |
|
iounmap(ctx->dev->rdev.oc_mw_kva); |
|
ib_dealloc_device(&ctx->dev->ibdev); |
|
ctx->dev = NULL; |
|
} |
|
|
|
static void c4iw_remove(struct uld_ctx *ctx) |
|
{ |
|
pr_debug("c4iw_dev %p\n", ctx->dev); |
|
debugfs_remove_recursive(ctx->dev->debugfs_root); |
|
c4iw_unregister_device(ctx->dev); |
|
c4iw_dealloc(ctx); |
|
} |
|
|
|
static int rdma_supported(const struct cxgb4_lld_info *infop) |
|
{ |
|
return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 && |
|
infop->vr->rq.size > 0 && infop->vr->qp.size > 0 && |
|
infop->vr->cq.size > 0; |
|
} |
|
|
|
static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop) |
|
{ |
|
struct c4iw_dev *devp; |
|
int ret; |
|
|
|
if (!rdma_supported(infop)) { |
|
pr_info("%s: RDMA not supported on this device\n", |
|
pci_name(infop->pdev)); |
|
return ERR_PTR(-ENOSYS); |
|
} |
|
if (!ocqp_supported(infop)) |
|
pr_info("%s: On-Chip Queues not supported on this device\n", |
|
pci_name(infop->pdev)); |
|
|
|
devp = ib_alloc_device(c4iw_dev, ibdev); |
|
if (!devp) { |
|
pr_err("Cannot allocate ib device\n"); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
devp->rdev.lldi = *infop; |
|
|
|
/* init various hw-queue params based on lld info */ |
|
pr_debug("Ing. padding boundary is %d, egrsstatuspagesize = %d\n", |
|
devp->rdev.lldi.sge_ingpadboundary, |
|
devp->rdev.lldi.sge_egrstatuspagesize); |
|
|
|
devp->rdev.hw_queue.t4_eq_status_entries = |
|
devp->rdev.lldi.sge_egrstatuspagesize / 64; |
|
devp->rdev.hw_queue.t4_max_eq_size = 65520; |
|
devp->rdev.hw_queue.t4_max_iq_size = 65520; |
|
devp->rdev.hw_queue.t4_max_rq_size = 8192 - |
|
devp->rdev.hw_queue.t4_eq_status_entries - 1; |
|
devp->rdev.hw_queue.t4_max_sq_size = |
|
devp->rdev.hw_queue.t4_max_eq_size - |
|
devp->rdev.hw_queue.t4_eq_status_entries - 1; |
|
devp->rdev.hw_queue.t4_max_qp_depth = |
|
devp->rdev.hw_queue.t4_max_rq_size; |
|
devp->rdev.hw_queue.t4_max_cq_depth = |
|
devp->rdev.hw_queue.t4_max_iq_size - 2; |
|
devp->rdev.hw_queue.t4_stat_len = |
|
devp->rdev.lldi.sge_egrstatuspagesize; |
|
|
|
/* |
|
* For T5/T6 devices, we map all of BAR2 with WC. |
|
* For T4 devices with onchip qp mem, we map only that part |
|
* of BAR2 with WC. |
|
*/ |
|
devp->rdev.bar2_pa = pci_resource_start(devp->rdev.lldi.pdev, 2); |
|
if (!is_t4(devp->rdev.lldi.adapter_type)) { |
|
devp->rdev.bar2_kva = ioremap_wc(devp->rdev.bar2_pa, |
|
pci_resource_len(devp->rdev.lldi.pdev, 2)); |
|
if (!devp->rdev.bar2_kva) { |
|
pr_err("Unable to ioremap BAR2\n"); |
|
ib_dealloc_device(&devp->ibdev); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
} else if (ocqp_supported(infop)) { |
|
devp->rdev.oc_mw_pa = |
|
pci_resource_start(devp->rdev.lldi.pdev, 2) + |
|
pci_resource_len(devp->rdev.lldi.pdev, 2) - |
|
roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size); |
|
devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa, |
|
devp->rdev.lldi.vr->ocq.size); |
|
if (!devp->rdev.oc_mw_kva) { |
|
pr_err("Unable to ioremap onchip mem\n"); |
|
ib_dealloc_device(&devp->ibdev); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
} |
|
|
|
pr_debug("ocq memory: hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n", |
|
devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size, |
|
devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva); |
|
|
|
ret = c4iw_rdev_open(&devp->rdev); |
|
if (ret) { |
|
pr_err("Unable to open CXIO rdev err %d\n", ret); |
|
ib_dealloc_device(&devp->ibdev); |
|
return ERR_PTR(ret); |
|
} |
|
|
|
xa_init_flags(&devp->cqs, XA_FLAGS_LOCK_IRQ); |
|
xa_init_flags(&devp->qps, XA_FLAGS_LOCK_IRQ); |
|
xa_init_flags(&devp->mrs, XA_FLAGS_LOCK_IRQ); |
|
xa_init_flags(&devp->hwtids, XA_FLAGS_LOCK_IRQ); |
|
xa_init_flags(&devp->atids, XA_FLAGS_LOCK_IRQ); |
|
xa_init_flags(&devp->stids, XA_FLAGS_LOCK_IRQ); |
|
mutex_init(&devp->rdev.stats.lock); |
|
mutex_init(&devp->db_mutex); |
|
INIT_LIST_HEAD(&devp->db_fc_list); |
|
init_waitqueue_head(&devp->wait); |
|
devp->avail_ird = devp->rdev.lldi.max_ird_adapter; |
|
|
|
if (c4iw_debugfs_root) { |
|
devp->debugfs_root = debugfs_create_dir( |
|
pci_name(devp->rdev.lldi.pdev), |
|
c4iw_debugfs_root); |
|
setup_debugfs(devp); |
|
} |
|
|
|
|
|
return devp; |
|
} |
|
|
|
static void *c4iw_uld_add(const struct cxgb4_lld_info *infop) |
|
{ |
|
struct uld_ctx *ctx; |
|
static int vers_printed; |
|
int i; |
|
|
|
if (!vers_printed++) |
|
pr_info("Chelsio T4/T5 RDMA Driver - version %s\n", |
|
DRV_VERSION); |
|
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
|
if (!ctx) { |
|
ctx = ERR_PTR(-ENOMEM); |
|
goto out; |
|
} |
|
ctx->lldi = *infop; |
|
|
|
pr_debug("found device %s nchan %u nrxq %u ntxq %u nports %u\n", |
|
pci_name(ctx->lldi.pdev), |
|
ctx->lldi.nchan, ctx->lldi.nrxq, |
|
ctx->lldi.ntxq, ctx->lldi.nports); |
|
|
|
mutex_lock(&dev_mutex); |
|
list_add_tail(&ctx->entry, &uld_ctx_list); |
|
mutex_unlock(&dev_mutex); |
|
|
|
for (i = 0; i < ctx->lldi.nrxq; i++) |
|
pr_debug("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]); |
|
out: |
|
return ctx; |
|
} |
|
|
|
static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl, |
|
const __be64 *rsp, |
|
u32 pktshift) |
|
{ |
|
struct sk_buff *skb; |
|
|
|
/* |
|
* Allocate space for cpl_pass_accept_req which will be synthesized by |
|
* driver. Once the driver synthesizes the request the skb will go |
|
* through the regular cpl_pass_accept_req processing. |
|
* The math here assumes sizeof cpl_pass_accept_req >= sizeof |
|
* cpl_rx_pkt. |
|
*/ |
|
skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) + |
|
sizeof(struct rss_header) - pktshift, GFP_ATOMIC); |
|
if (unlikely(!skb)) |
|
return NULL; |
|
|
|
__skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) + |
|
sizeof(struct rss_header) - pktshift); |
|
|
|
/* |
|
* This skb will contain: |
|
* rss_header from the rspq descriptor (1 flit) |
|
* cpl_rx_pkt struct from the rspq descriptor (2 flits) |
|
* space for the difference between the size of an |
|
* rx_pkt and pass_accept_req cpl (1 flit) |
|
* the packet data from the gl |
|
*/ |
|
skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) + |
|
sizeof(struct rss_header)); |
|
skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) + |
|
sizeof(struct cpl_pass_accept_req), |
|
gl->va + pktshift, |
|
gl->tot_len - pktshift); |
|
return skb; |
|
} |
|
|
|
static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl, |
|
const __be64 *rsp) |
|
{ |
|
unsigned int opcode = *(u8 *)rsp; |
|
struct sk_buff *skb; |
|
|
|
if (opcode != CPL_RX_PKT) |
|
goto out; |
|
|
|
skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift); |
|
if (skb == NULL) |
|
goto out; |
|
|
|
if (c4iw_handlers[opcode] == NULL) { |
|
pr_info("%s no handler opcode 0x%x...\n", __func__, opcode); |
|
kfree_skb(skb); |
|
goto out; |
|
} |
|
c4iw_handlers[opcode](dev, skb); |
|
return 1; |
|
out: |
|
return 0; |
|
} |
|
|
|
static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp, |
|
const struct pkt_gl *gl) |
|
{ |
|
struct uld_ctx *ctx = handle; |
|
struct c4iw_dev *dev = ctx->dev; |
|
struct sk_buff *skb; |
|
u8 opcode; |
|
|
|
if (gl == NULL) { |
|
/* omit RSS and rsp_ctrl at end of descriptor */ |
|
unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; |
|
|
|
skb = alloc_skb(256, GFP_ATOMIC); |
|
if (!skb) |
|
goto nomem; |
|
__skb_put(skb, len); |
|
skb_copy_to_linear_data(skb, &rsp[1], len); |
|
} else if (gl == CXGB4_MSG_AN) { |
|
const struct rsp_ctrl *rc = (void *)rsp; |
|
|
|
u32 qid = be32_to_cpu(rc->pldbuflen_qid); |
|
c4iw_ev_handler(dev, qid); |
|
return 0; |
|
} else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) { |
|
if (recv_rx_pkt(dev, gl, rsp)) |
|
return 0; |
|
|
|
pr_info("%s: unexpected FL contents at %p, RSS %#llx, FL %#llx, len %u\n", |
|
pci_name(ctx->lldi.pdev), gl->va, |
|
be64_to_cpu(*rsp), |
|
be64_to_cpu(*(__force __be64 *)gl->va), |
|
gl->tot_len); |
|
|
|
return 0; |
|
} else { |
|
skb = cxgb4_pktgl_to_skb(gl, 128, 128); |
|
if (unlikely(!skb)) |
|
goto nomem; |
|
} |
|
|
|
opcode = *(u8 *)rsp; |
|
if (c4iw_handlers[opcode]) { |
|
c4iw_handlers[opcode](dev, skb); |
|
} else { |
|
pr_info("%s no handler opcode 0x%x...\n", __func__, opcode); |
|
kfree_skb(skb); |
|
} |
|
|
|
return 0; |
|
nomem: |
|
return -1; |
|
} |
|
|
|
static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state) |
|
{ |
|
struct uld_ctx *ctx = handle; |
|
|
|
pr_debug("new_state %u\n", new_state); |
|
switch (new_state) { |
|
case CXGB4_STATE_UP: |
|
pr_info("%s: Up\n", pci_name(ctx->lldi.pdev)); |
|
if (!ctx->dev) { |
|
ctx->dev = c4iw_alloc(&ctx->lldi); |
|
if (IS_ERR(ctx->dev)) { |
|
pr_err("%s: initialization failed: %ld\n", |
|
pci_name(ctx->lldi.pdev), |
|
PTR_ERR(ctx->dev)); |
|
ctx->dev = NULL; |
|
break; |
|
} |
|
|
|
INIT_WORK(&ctx->reg_work, c4iw_register_device); |
|
queue_work(reg_workq, &ctx->reg_work); |
|
} |
|
break; |
|
case CXGB4_STATE_DOWN: |
|
pr_info("%s: Down\n", pci_name(ctx->lldi.pdev)); |
|
if (ctx->dev) |
|
c4iw_remove(ctx); |
|
break; |
|
case CXGB4_STATE_FATAL_ERROR: |
|
case CXGB4_STATE_START_RECOVERY: |
|
pr_info("%s: Fatal Error\n", pci_name(ctx->lldi.pdev)); |
|
if (ctx->dev) { |
|
struct ib_event event = {}; |
|
|
|
ctx->dev->rdev.flags |= T4_FATAL_ERROR; |
|
event.event = IB_EVENT_DEVICE_FATAL; |
|
event.device = &ctx->dev->ibdev; |
|
ib_dispatch_event(&event); |
|
c4iw_remove(ctx); |
|
} |
|
break; |
|
case CXGB4_STATE_DETACH: |
|
pr_info("%s: Detach\n", pci_name(ctx->lldi.pdev)); |
|
if (ctx->dev) |
|
c4iw_remove(ctx); |
|
break; |
|
} |
|
return 0; |
|
} |
|
|
|
static void stop_queues(struct uld_ctx *ctx) |
|
{ |
|
struct c4iw_qp *qp; |
|
unsigned long index, flags; |
|
|
|
xa_lock_irqsave(&ctx->dev->qps, flags); |
|
ctx->dev->rdev.stats.db_state_transitions++; |
|
ctx->dev->db_state = STOPPED; |
|
if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) { |
|
xa_for_each(&ctx->dev->qps, index, qp) |
|
t4_disable_wq_db(&qp->wq); |
|
} else { |
|
ctx->dev->rdev.status_page->db_off = 1; |
|
} |
|
xa_unlock_irqrestore(&ctx->dev->qps, flags); |
|
} |
|
|
|
static void resume_rc_qp(struct c4iw_qp *qp) |
|
{ |
|
spin_lock(&qp->lock); |
|
t4_ring_sq_db(&qp->wq, qp->wq.sq.wq_pidx_inc, NULL); |
|
qp->wq.sq.wq_pidx_inc = 0; |
|
t4_ring_rq_db(&qp->wq, qp->wq.rq.wq_pidx_inc, NULL); |
|
qp->wq.rq.wq_pidx_inc = 0; |
|
spin_unlock(&qp->lock); |
|
} |
|
|
|
static void resume_a_chunk(struct uld_ctx *ctx) |
|
{ |
|
int i; |
|
struct c4iw_qp *qp; |
|
|
|
for (i = 0; i < DB_FC_RESUME_SIZE; i++) { |
|
qp = list_first_entry(&ctx->dev->db_fc_list, struct c4iw_qp, |
|
db_fc_entry); |
|
list_del_init(&qp->db_fc_entry); |
|
resume_rc_qp(qp); |
|
if (list_empty(&ctx->dev->db_fc_list)) |
|
break; |
|
} |
|
} |
|
|
|
static void resume_queues(struct uld_ctx *ctx) |
|
{ |
|
xa_lock_irq(&ctx->dev->qps); |
|
if (ctx->dev->db_state != STOPPED) |
|
goto out; |
|
ctx->dev->db_state = FLOW_CONTROL; |
|
while (1) { |
|
if (list_empty(&ctx->dev->db_fc_list)) { |
|
struct c4iw_qp *qp; |
|
unsigned long index; |
|
|
|
WARN_ON(ctx->dev->db_state != FLOW_CONTROL); |
|
ctx->dev->db_state = NORMAL; |
|
ctx->dev->rdev.stats.db_state_transitions++; |
|
if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) { |
|
xa_for_each(&ctx->dev->qps, index, qp) |
|
t4_enable_wq_db(&qp->wq); |
|
} else { |
|
ctx->dev->rdev.status_page->db_off = 0; |
|
} |
|
break; |
|
} else { |
|
if (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1) |
|
< (ctx->dev->rdev.lldi.dbfifo_int_thresh << |
|
DB_FC_DRAIN_THRESH)) { |
|
resume_a_chunk(ctx); |
|
} |
|
if (!list_empty(&ctx->dev->db_fc_list)) { |
|
xa_unlock_irq(&ctx->dev->qps); |
|
if (DB_FC_RESUME_DELAY) { |
|
set_current_state(TASK_UNINTERRUPTIBLE); |
|
schedule_timeout(DB_FC_RESUME_DELAY); |
|
} |
|
xa_lock_irq(&ctx->dev->qps); |
|
if (ctx->dev->db_state != FLOW_CONTROL) |
|
break; |
|
} |
|
} |
|
} |
|
out: |
|
if (ctx->dev->db_state != NORMAL) |
|
ctx->dev->rdev.stats.db_fc_interruptions++; |
|
xa_unlock_irq(&ctx->dev->qps); |
|
} |
|
|
|
struct qp_list { |
|
unsigned idx; |
|
struct c4iw_qp **qps; |
|
}; |
|
|
|
static void deref_qps(struct qp_list *qp_list) |
|
{ |
|
int idx; |
|
|
|
for (idx = 0; idx < qp_list->idx; idx++) |
|
c4iw_qp_rem_ref(&qp_list->qps[idx]->ibqp); |
|
} |
|
|
|
static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list) |
|
{ |
|
int idx; |
|
int ret; |
|
|
|
for (idx = 0; idx < qp_list->idx; idx++) { |
|
struct c4iw_qp *qp = qp_list->qps[idx]; |
|
|
|
xa_lock_irq(&qp->rhp->qps); |
|
spin_lock(&qp->lock); |
|
ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0], |
|
qp->wq.sq.qid, |
|
t4_sq_host_wq_pidx(&qp->wq), |
|
t4_sq_wq_size(&qp->wq)); |
|
if (ret) { |
|
pr_err("%s: Fatal error - DB overflow recovery failed - error syncing SQ qid %u\n", |
|
pci_name(ctx->lldi.pdev), qp->wq.sq.qid); |
|
spin_unlock(&qp->lock); |
|
xa_unlock_irq(&qp->rhp->qps); |
|
return; |
|
} |
|
qp->wq.sq.wq_pidx_inc = 0; |
|
|
|
ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0], |
|
qp->wq.rq.qid, |
|
t4_rq_host_wq_pidx(&qp->wq), |
|
t4_rq_wq_size(&qp->wq)); |
|
|
|
if (ret) { |
|
pr_err("%s: Fatal error - DB overflow recovery failed - error syncing RQ qid %u\n", |
|
pci_name(ctx->lldi.pdev), qp->wq.rq.qid); |
|
spin_unlock(&qp->lock); |
|
xa_unlock_irq(&qp->rhp->qps); |
|
return; |
|
} |
|
qp->wq.rq.wq_pidx_inc = 0; |
|
spin_unlock(&qp->lock); |
|
xa_unlock_irq(&qp->rhp->qps); |
|
|
|
/* Wait for the dbfifo to drain */ |
|
while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) { |
|
set_current_state(TASK_UNINTERRUPTIBLE); |
|
schedule_timeout(usecs_to_jiffies(10)); |
|
} |
|
} |
|
} |
|
|
|
static void recover_queues(struct uld_ctx *ctx) |
|
{ |
|
struct c4iw_qp *qp; |
|
unsigned long index; |
|
int count = 0; |
|
struct qp_list qp_list; |
|
int ret; |
|
|
|
/* slow everybody down */ |
|
set_current_state(TASK_UNINTERRUPTIBLE); |
|
schedule_timeout(usecs_to_jiffies(1000)); |
|
|
|
/* flush the SGE contexts */ |
|
ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]); |
|
if (ret) { |
|
pr_err("%s: Fatal error - DB overflow recovery failed\n", |
|
pci_name(ctx->lldi.pdev)); |
|
return; |
|
} |
|
|
|
/* Count active queues so we can build a list of queues to recover */ |
|
xa_lock_irq(&ctx->dev->qps); |
|
WARN_ON(ctx->dev->db_state != STOPPED); |
|
ctx->dev->db_state = RECOVERY; |
|
xa_for_each(&ctx->dev->qps, index, qp) |
|
count++; |
|
|
|
qp_list.qps = kcalloc(count, sizeof(*qp_list.qps), GFP_ATOMIC); |
|
if (!qp_list.qps) { |
|
xa_unlock_irq(&ctx->dev->qps); |
|
return; |
|
} |
|
qp_list.idx = 0; |
|
|
|
/* add and ref each qp so it doesn't get freed */ |
|
xa_for_each(&ctx->dev->qps, index, qp) { |
|
c4iw_qp_add_ref(&qp->ibqp); |
|
qp_list.qps[qp_list.idx++] = qp; |
|
} |
|
|
|
xa_unlock_irq(&ctx->dev->qps); |
|
|
|
/* now traverse the list in a safe context to recover the db state*/ |
|
recover_lost_dbs(ctx, &qp_list); |
|
|
|
/* we're almost done! deref the qps and clean up */ |
|
deref_qps(&qp_list); |
|
kfree(qp_list.qps); |
|
|
|
xa_lock_irq(&ctx->dev->qps); |
|
WARN_ON(ctx->dev->db_state != RECOVERY); |
|
ctx->dev->db_state = STOPPED; |
|
xa_unlock_irq(&ctx->dev->qps); |
|
} |
|
|
|
static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...) |
|
{ |
|
struct uld_ctx *ctx = handle; |
|
|
|
switch (control) { |
|
case CXGB4_CONTROL_DB_FULL: |
|
stop_queues(ctx); |
|
ctx->dev->rdev.stats.db_full++; |
|
break; |
|
case CXGB4_CONTROL_DB_EMPTY: |
|
resume_queues(ctx); |
|
mutex_lock(&ctx->dev->rdev.stats.lock); |
|
ctx->dev->rdev.stats.db_empty++; |
|
mutex_unlock(&ctx->dev->rdev.stats.lock); |
|
break; |
|
case CXGB4_CONTROL_DB_DROP: |
|
recover_queues(ctx); |
|
mutex_lock(&ctx->dev->rdev.stats.lock); |
|
ctx->dev->rdev.stats.db_drop++; |
|
mutex_unlock(&ctx->dev->rdev.stats.lock); |
|
break; |
|
default: |
|
pr_warn("%s: unknown control cmd %u\n", |
|
pci_name(ctx->lldi.pdev), control); |
|
break; |
|
} |
|
return 0; |
|
} |
|
|
|
static struct cxgb4_uld_info c4iw_uld_info = { |
|
.name = DRV_NAME, |
|
.nrxq = MAX_ULD_QSETS, |
|
.ntxq = MAX_ULD_QSETS, |
|
.rxq_size = 511, |
|
.ciq = true, |
|
.lro = false, |
|
.add = c4iw_uld_add, |
|
.rx_handler = c4iw_uld_rx_handler, |
|
.state_change = c4iw_uld_state_change, |
|
.control = c4iw_uld_control, |
|
}; |
|
|
|
void _c4iw_free_wr_wait(struct kref *kref) |
|
{ |
|
struct c4iw_wr_wait *wr_waitp; |
|
|
|
wr_waitp = container_of(kref, struct c4iw_wr_wait, kref); |
|
pr_debug("Free wr_wait %p\n", wr_waitp); |
|
kfree(wr_waitp); |
|
} |
|
|
|
struct c4iw_wr_wait *c4iw_alloc_wr_wait(gfp_t gfp) |
|
{ |
|
struct c4iw_wr_wait *wr_waitp; |
|
|
|
wr_waitp = kzalloc(sizeof(*wr_waitp), gfp); |
|
if (wr_waitp) { |
|
kref_init(&wr_waitp->kref); |
|
pr_debug("wr_wait %p\n", wr_waitp); |
|
} |
|
return wr_waitp; |
|
} |
|
|
|
static int __init c4iw_init_module(void) |
|
{ |
|
int err; |
|
|
|
err = c4iw_cm_init(); |
|
if (err) |
|
return err; |
|
|
|
c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL); |
|
|
|
reg_workq = create_singlethread_workqueue("Register_iWARP_device"); |
|
if (!reg_workq) { |
|
pr_err("Failed creating workqueue to register iwarp device\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info); |
|
|
|
return 0; |
|
} |
|
|
|
static void __exit c4iw_exit_module(void) |
|
{ |
|
struct uld_ctx *ctx, *tmp; |
|
|
|
mutex_lock(&dev_mutex); |
|
list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) { |
|
if (ctx->dev) |
|
c4iw_remove(ctx); |
|
kfree(ctx); |
|
} |
|
mutex_unlock(&dev_mutex); |
|
flush_workqueue(reg_workq); |
|
destroy_workqueue(reg_workq); |
|
cxgb4_unregister_uld(CXGB4_ULD_RDMA); |
|
c4iw_cm_term(); |
|
debugfs_remove_recursive(c4iw_debugfs_root); |
|
} |
|
|
|
module_init(c4iw_init_module); |
|
module_exit(c4iw_exit_module);
|
|
|