Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/moduleparam.h> |
| 34 | #include <linux/debugfs.h> |
Vipul Pandya | e572568 | 2012-05-21 17:31:13 +0530 | [diff] [blame] | 35 | #include <linux/vmalloc.h> |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 36 | |
| 37 | #include <rdma/ib_verbs.h> |
| 38 | |
| 39 | #include "iw_cxgb4.h" |
| 40 | |
| 41 | #define DRV_VERSION "0.1" |
| 42 | |
| 43 | MODULE_AUTHOR("Steve Wise"); |
Vipul Pandya | f079af7 | 2013-03-14 05:08:58 +0000 | [diff] [blame] | 44 | MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver"); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 45 | MODULE_LICENSE("Dual BSD/GPL"); |
| 46 | MODULE_VERSION(DRV_VERSION); |
| 47 | |
Vipul Pandya | 80ccdd6 | 2013-03-14 05:09:00 +0000 | [diff] [blame] | 48 | static int allow_db_fc_on_t5; |
| 49 | module_param(allow_db_fc_on_t5, int, 0644); |
| 50 | MODULE_PARM_DESC(allow_db_fc_on_t5, |
| 51 | "Allow DB Flow Control on T5 (default = 0)"); |
| 52 | |
| 53 | static int allow_db_coalescing_on_t5; |
| 54 | module_param(allow_db_coalescing_on_t5, int, 0644); |
| 55 | MODULE_PARM_DESC(allow_db_coalescing_on_t5, |
| 56 | "Allow DB Coalescing on T5 (default = 0)"); |
| 57 | |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 58 | struct uld_ctx { |
| 59 | struct list_head entry; |
| 60 | struct cxgb4_lld_info lldi; |
| 61 | struct c4iw_dev *dev; |
| 62 | }; |
| 63 | |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 64 | static LIST_HEAD(uld_ctx_list); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 65 | static DEFINE_MUTEX(dev_mutex); |
| 66 | |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 67 | #define DB_FC_RESUME_SIZE 64 |
| 68 | #define DB_FC_RESUME_DELAY 1 |
| 69 | #define DB_FC_DRAIN_THRESH 0 |
| 70 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 71 | static struct dentry *c4iw_debugfs_root; |
| 72 | |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 73 | struct c4iw_debugfs_data { |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 74 | struct c4iw_dev *devp; |
| 75 | char *buf; |
| 76 | int bufsize; |
| 77 | int pos; |
| 78 | }; |
| 79 | |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 80 | static int count_idrs(int id, void *p, void *data) |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 81 | { |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 82 | int *countp = data; |
| 83 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 84 | *countp = *countp + 1; |
| 85 | return 0; |
| 86 | } |
| 87 | |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 88 | static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count, |
| 89 | loff_t *ppos) |
| 90 | { |
| 91 | struct c4iw_debugfs_data *d = file->private_data; |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 92 | |
Steve Wise | 3160977 | 2010-09-29 18:21:33 +0000 | [diff] [blame] | 93 | return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos); |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | static int dump_qp(int id, void *p, void *data) |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 97 | { |
| 98 | struct c4iw_qp *qp = p; |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 99 | struct c4iw_debugfs_data *qpd = data; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 100 | int space; |
| 101 | int cc; |
| 102 | |
| 103 | if (id != qp->wq.sq.qid) |
| 104 | return 0; |
| 105 | |
| 106 | space = qpd->bufsize - qpd->pos - 1; |
| 107 | if (space == 0) |
| 108 | return 1; |
| 109 | |
Vipul Pandya | 830662f | 2013-07-04 16:10:47 +0530 | [diff] [blame] | 110 | if (qp->ep) { |
| 111 | if (qp->ep->com.local_addr.ss_family == AF_INET) { |
| 112 | struct sockaddr_in *lsin = (struct sockaddr_in *) |
| 113 | &qp->ep->com.local_addr; |
| 114 | struct sockaddr_in *rsin = (struct sockaddr_in *) |
| 115 | &qp->ep->com.remote_addr; |
| 116 | |
| 117 | cc = snprintf(qpd->buf + qpd->pos, space, |
| 118 | "rc qp sq id %u rq id %u state %u " |
| 119 | "onchip %u ep tid %u state %u " |
| 120 | "%pI4:%u->%pI4:%u\n", |
| 121 | qp->wq.sq.qid, qp->wq.rq.qid, |
| 122 | (int)qp->attr.state, |
| 123 | qp->wq.sq.flags & T4_SQ_ONCHIP, |
| 124 | qp->ep->hwtid, (int)qp->ep->com.state, |
| 125 | &lsin->sin_addr, ntohs(lsin->sin_port), |
| 126 | &rsin->sin_addr, ntohs(rsin->sin_port)); |
| 127 | } else { |
| 128 | struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *) |
| 129 | &qp->ep->com.local_addr; |
| 130 | struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *) |
| 131 | &qp->ep->com.remote_addr; |
| 132 | |
| 133 | cc = snprintf(qpd->buf + qpd->pos, space, |
| 134 | "rc qp sq id %u rq id %u state %u " |
| 135 | "onchip %u ep tid %u state %u " |
| 136 | "%pI6:%u->%pI6:%u\n", |
| 137 | qp->wq.sq.qid, qp->wq.rq.qid, |
| 138 | (int)qp->attr.state, |
| 139 | qp->wq.sq.flags & T4_SQ_ONCHIP, |
| 140 | qp->ep->hwtid, (int)qp->ep->com.state, |
| 141 | &lsin6->sin6_addr, |
| 142 | ntohs(lsin6->sin6_port), |
| 143 | &rsin6->sin6_addr, |
| 144 | ntohs(rsin6->sin6_port)); |
| 145 | } |
| 146 | } else |
Steve Wise | db5d040 | 2011-03-11 22:29:50 +0000 | [diff] [blame] | 147 | cc = snprintf(qpd->buf + qpd->pos, space, |
| 148 | "qp sq id %u rq id %u state %u onchip %u\n", |
| 149 | qp->wq.sq.qid, qp->wq.rq.qid, |
| 150 | (int)qp->attr.state, |
| 151 | qp->wq.sq.flags & T4_SQ_ONCHIP); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 152 | if (cc < space) |
| 153 | qpd->pos += cc; |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static int qp_release(struct inode *inode, struct file *file) |
| 158 | { |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 159 | struct c4iw_debugfs_data *qpd = file->private_data; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 160 | if (!qpd) { |
| 161 | printk(KERN_INFO "%s null qpd?\n", __func__); |
| 162 | return 0; |
| 163 | } |
Vipul Pandya | d716a2a | 2012-05-18 15:29:31 +0530 | [diff] [blame] | 164 | vfree(qpd->buf); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 165 | kfree(qpd); |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static int qp_open(struct inode *inode, struct file *file) |
| 170 | { |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 171 | struct c4iw_debugfs_data *qpd; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 172 | int ret = 0; |
| 173 | int count = 1; |
| 174 | |
| 175 | qpd = kmalloc(sizeof *qpd, GFP_KERNEL); |
| 176 | if (!qpd) { |
| 177 | ret = -ENOMEM; |
| 178 | goto out; |
| 179 | } |
| 180 | qpd->devp = inode->i_private; |
| 181 | qpd->pos = 0; |
| 182 | |
| 183 | spin_lock_irq(&qpd->devp->lock); |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 184 | idr_for_each(&qpd->devp->qpidr, count_idrs, &count); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 185 | spin_unlock_irq(&qpd->devp->lock); |
| 186 | |
| 187 | qpd->bufsize = count * 128; |
Vipul Pandya | d716a2a | 2012-05-18 15:29:31 +0530 | [diff] [blame] | 188 | qpd->buf = vmalloc(qpd->bufsize); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 189 | if (!qpd->buf) { |
| 190 | ret = -ENOMEM; |
| 191 | goto err1; |
| 192 | } |
| 193 | |
| 194 | spin_lock_irq(&qpd->devp->lock); |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 195 | idr_for_each(&qpd->devp->qpidr, dump_qp, qpd); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 196 | spin_unlock_irq(&qpd->devp->lock); |
| 197 | |
| 198 | qpd->buf[qpd->pos++] = 0; |
| 199 | file->private_data = qpd; |
| 200 | goto out; |
| 201 | err1: |
| 202 | kfree(qpd); |
| 203 | out: |
| 204 | return ret; |
| 205 | } |
| 206 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 207 | static const struct file_operations qp_debugfs_fops = { |
| 208 | .owner = THIS_MODULE, |
| 209 | .open = qp_open, |
| 210 | .release = qp_release, |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 211 | .read = debugfs_read, |
Steve Wise | 8bbac89 | 2010-09-29 14:11:12 +0000 | [diff] [blame] | 212 | .llseek = default_llseek, |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 213 | }; |
| 214 | |
| 215 | static int dump_stag(int id, void *p, void *data) |
| 216 | { |
| 217 | struct c4iw_debugfs_data *stagd = data; |
| 218 | int space; |
| 219 | int cc; |
| 220 | |
| 221 | space = stagd->bufsize - stagd->pos - 1; |
| 222 | if (space == 0) |
| 223 | return 1; |
| 224 | |
| 225 | cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8); |
| 226 | if (cc < space) |
| 227 | stagd->pos += cc; |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | static int stag_release(struct inode *inode, struct file *file) |
| 232 | { |
| 233 | struct c4iw_debugfs_data *stagd = file->private_data; |
| 234 | if (!stagd) { |
| 235 | printk(KERN_INFO "%s null stagd?\n", __func__); |
| 236 | return 0; |
| 237 | } |
| 238 | kfree(stagd->buf); |
| 239 | kfree(stagd); |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | static int stag_open(struct inode *inode, struct file *file) |
| 244 | { |
| 245 | struct c4iw_debugfs_data *stagd; |
| 246 | int ret = 0; |
| 247 | int count = 1; |
| 248 | |
| 249 | stagd = kmalloc(sizeof *stagd, GFP_KERNEL); |
| 250 | if (!stagd) { |
| 251 | ret = -ENOMEM; |
| 252 | goto out; |
| 253 | } |
| 254 | stagd->devp = inode->i_private; |
| 255 | stagd->pos = 0; |
| 256 | |
| 257 | spin_lock_irq(&stagd->devp->lock); |
| 258 | idr_for_each(&stagd->devp->mmidr, count_idrs, &count); |
| 259 | spin_unlock_irq(&stagd->devp->lock); |
| 260 | |
| 261 | stagd->bufsize = count * sizeof("0x12345678\n"); |
| 262 | stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL); |
| 263 | if (!stagd->buf) { |
| 264 | ret = -ENOMEM; |
| 265 | goto err1; |
| 266 | } |
| 267 | |
| 268 | spin_lock_irq(&stagd->devp->lock); |
| 269 | idr_for_each(&stagd->devp->mmidr, dump_stag, stagd); |
| 270 | spin_unlock_irq(&stagd->devp->lock); |
| 271 | |
| 272 | stagd->buf[stagd->pos++] = 0; |
| 273 | file->private_data = stagd; |
| 274 | goto out; |
| 275 | err1: |
| 276 | kfree(stagd); |
| 277 | out: |
| 278 | return ret; |
| 279 | } |
| 280 | |
| 281 | static const struct file_operations stag_debugfs_fops = { |
| 282 | .owner = THIS_MODULE, |
| 283 | .open = stag_open, |
| 284 | .release = stag_release, |
| 285 | .read = debugfs_read, |
Steve Wise | 8bbac89 | 2010-09-29 14:11:12 +0000 | [diff] [blame] | 286 | .llseek = default_llseek, |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 287 | }; |
| 288 | |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 289 | static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"}; |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 290 | |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 291 | static int stats_show(struct seq_file *seq, void *v) |
| 292 | { |
| 293 | struct c4iw_dev *dev = seq->private; |
| 294 | |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 295 | seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current", |
| 296 | "Max", "Fail"); |
| 297 | seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n", |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 298 | dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur, |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 299 | dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail); |
| 300 | seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n", |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 301 | dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur, |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 302 | dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail); |
| 303 | seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n", |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 304 | dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur, |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 305 | dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail); |
| 306 | seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n", |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 307 | dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur, |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 308 | dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail); |
| 309 | seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n", |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 310 | dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur, |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 311 | dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail); |
| 312 | seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n", |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 313 | dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur, |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 314 | dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail); |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 315 | seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full); |
| 316 | seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty); |
| 317 | seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 318 | seq_printf(seq, " DB State: %s Transitions %llu FC Interruptions %llu\n", |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 319 | db_state_str[dev->db_state], |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 320 | dev->rdev.stats.db_state_transitions, |
| 321 | dev->rdev.stats.db_fc_interruptions); |
Vipul Pandya | 1cab775 | 2012-12-10 09:30:55 +0000 | [diff] [blame] | 322 | seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full); |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 323 | seq_printf(seq, "ACT_OFLD_CONN_FAILS: %10llu\n", |
| 324 | dev->rdev.stats.act_ofld_conn_fails); |
| 325 | seq_printf(seq, "PAS_OFLD_CONN_FAILS: %10llu\n", |
| 326 | dev->rdev.stats.pas_ofld_conn_fails); |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | static int stats_open(struct inode *inode, struct file *file) |
| 331 | { |
| 332 | return single_open(file, stats_show, inode->i_private); |
| 333 | } |
| 334 | |
| 335 | static ssize_t stats_clear(struct file *file, const char __user *buf, |
| 336 | size_t count, loff_t *pos) |
| 337 | { |
| 338 | struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private; |
| 339 | |
| 340 | mutex_lock(&dev->rdev.stats.lock); |
| 341 | dev->rdev.stats.pd.max = 0; |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 342 | dev->rdev.stats.pd.fail = 0; |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 343 | dev->rdev.stats.qid.max = 0; |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 344 | dev->rdev.stats.qid.fail = 0; |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 345 | dev->rdev.stats.stag.max = 0; |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 346 | dev->rdev.stats.stag.fail = 0; |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 347 | dev->rdev.stats.pbl.max = 0; |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 348 | dev->rdev.stats.pbl.fail = 0; |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 349 | dev->rdev.stats.rqt.max = 0; |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 350 | dev->rdev.stats.rqt.fail = 0; |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 351 | dev->rdev.stats.ocqp.max = 0; |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 352 | dev->rdev.stats.ocqp.fail = 0; |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 353 | dev->rdev.stats.db_full = 0; |
| 354 | dev->rdev.stats.db_empty = 0; |
| 355 | dev->rdev.stats.db_drop = 0; |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 356 | dev->rdev.stats.db_state_transitions = 0; |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 357 | dev->rdev.stats.tcam_full = 0; |
| 358 | dev->rdev.stats.act_ofld_conn_fails = 0; |
| 359 | dev->rdev.stats.pas_ofld_conn_fails = 0; |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 360 | mutex_unlock(&dev->rdev.stats.lock); |
| 361 | return count; |
| 362 | } |
| 363 | |
| 364 | static const struct file_operations stats_debugfs_fops = { |
| 365 | .owner = THIS_MODULE, |
| 366 | .open = stats_open, |
| 367 | .release = single_release, |
| 368 | .read = seq_read, |
| 369 | .llseek = seq_lseek, |
| 370 | .write = stats_clear, |
| 371 | }; |
| 372 | |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 373 | static int dump_ep(int id, void *p, void *data) |
| 374 | { |
| 375 | struct c4iw_ep *ep = p; |
| 376 | struct c4iw_debugfs_data *epd = data; |
| 377 | int space; |
| 378 | int cc; |
| 379 | |
| 380 | space = epd->bufsize - epd->pos - 1; |
| 381 | if (space == 0) |
| 382 | return 1; |
| 383 | |
Vipul Pandya | 830662f | 2013-07-04 16:10:47 +0530 | [diff] [blame] | 384 | if (ep->com.local_addr.ss_family == AF_INET) { |
| 385 | struct sockaddr_in *lsin = (struct sockaddr_in *) |
| 386 | &ep->com.local_addr; |
| 387 | struct sockaddr_in *rsin = (struct sockaddr_in *) |
| 388 | &ep->com.remote_addr; |
| 389 | |
| 390 | cc = snprintf(epd->buf + epd->pos, space, |
| 391 | "ep %p cm_id %p qp %p state %d flags 0x%lx " |
| 392 | "history 0x%lx hwtid %d atid %d " |
| 393 | "%pI4:%d <-> %pI4:%d\n", |
| 394 | ep, ep->com.cm_id, ep->com.qp, |
| 395 | (int)ep->com.state, ep->com.flags, |
| 396 | ep->com.history, ep->hwtid, ep->atid, |
| 397 | &lsin->sin_addr, ntohs(lsin->sin_port), |
| 398 | &rsin->sin_addr, ntohs(rsin->sin_port)); |
| 399 | } else { |
| 400 | struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *) |
| 401 | &ep->com.local_addr; |
| 402 | struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *) |
| 403 | &ep->com.remote_addr; |
| 404 | |
| 405 | cc = snprintf(epd->buf + epd->pos, space, |
| 406 | "ep %p cm_id %p qp %p state %d flags 0x%lx " |
| 407 | "history 0x%lx hwtid %d atid %d " |
| 408 | "%pI6:%d <-> %pI6:%d\n", |
| 409 | ep, ep->com.cm_id, ep->com.qp, |
| 410 | (int)ep->com.state, ep->com.flags, |
| 411 | ep->com.history, ep->hwtid, ep->atid, |
| 412 | &lsin6->sin6_addr, ntohs(lsin6->sin6_port), |
| 413 | &rsin6->sin6_addr, ntohs(rsin6->sin6_port)); |
| 414 | } |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 415 | if (cc < space) |
| 416 | epd->pos += cc; |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static int dump_listen_ep(int id, void *p, void *data) |
| 421 | { |
| 422 | struct c4iw_listen_ep *ep = p; |
| 423 | struct c4iw_debugfs_data *epd = data; |
| 424 | int space; |
| 425 | int cc; |
| 426 | |
| 427 | space = epd->bufsize - epd->pos - 1; |
| 428 | if (space == 0) |
| 429 | return 1; |
| 430 | |
Vipul Pandya | 830662f | 2013-07-04 16:10:47 +0530 | [diff] [blame] | 431 | if (ep->com.local_addr.ss_family == AF_INET) { |
| 432 | struct sockaddr_in *lsin = (struct sockaddr_in *) |
| 433 | &ep->com.local_addr; |
| 434 | |
| 435 | cc = snprintf(epd->buf + epd->pos, space, |
| 436 | "ep %p cm_id %p state %d flags 0x%lx stid %d " |
| 437 | "backlog %d %pI4:%d\n", |
| 438 | ep, ep->com.cm_id, (int)ep->com.state, |
| 439 | ep->com.flags, ep->stid, ep->backlog, |
| 440 | &lsin->sin_addr, ntohs(lsin->sin_port)); |
| 441 | } else { |
| 442 | struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *) |
| 443 | &ep->com.local_addr; |
| 444 | |
| 445 | cc = snprintf(epd->buf + epd->pos, space, |
| 446 | "ep %p cm_id %p state %d flags 0x%lx stid %d " |
| 447 | "backlog %d %pI6:%d\n", |
| 448 | ep, ep->com.cm_id, (int)ep->com.state, |
| 449 | ep->com.flags, ep->stid, ep->backlog, |
| 450 | &lsin6->sin6_addr, ntohs(lsin6->sin6_port)); |
| 451 | } |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 452 | if (cc < space) |
| 453 | epd->pos += cc; |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | static int ep_release(struct inode *inode, struct file *file) |
| 458 | { |
| 459 | struct c4iw_debugfs_data *epd = file->private_data; |
| 460 | if (!epd) { |
| 461 | pr_info("%s null qpd?\n", __func__); |
| 462 | return 0; |
| 463 | } |
| 464 | vfree(epd->buf); |
| 465 | kfree(epd); |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static int ep_open(struct inode *inode, struct file *file) |
| 470 | { |
| 471 | struct c4iw_debugfs_data *epd; |
| 472 | int ret = 0; |
| 473 | int count = 1; |
| 474 | |
| 475 | epd = kmalloc(sizeof(*epd), GFP_KERNEL); |
| 476 | if (!epd) { |
| 477 | ret = -ENOMEM; |
| 478 | goto out; |
| 479 | } |
| 480 | epd->devp = inode->i_private; |
| 481 | epd->pos = 0; |
| 482 | |
| 483 | spin_lock_irq(&epd->devp->lock); |
| 484 | idr_for_each(&epd->devp->hwtid_idr, count_idrs, &count); |
| 485 | idr_for_each(&epd->devp->atid_idr, count_idrs, &count); |
| 486 | idr_for_each(&epd->devp->stid_idr, count_idrs, &count); |
| 487 | spin_unlock_irq(&epd->devp->lock); |
| 488 | |
| 489 | epd->bufsize = count * 160; |
| 490 | epd->buf = vmalloc(epd->bufsize); |
| 491 | if (!epd->buf) { |
| 492 | ret = -ENOMEM; |
| 493 | goto err1; |
| 494 | } |
| 495 | |
| 496 | spin_lock_irq(&epd->devp->lock); |
| 497 | idr_for_each(&epd->devp->hwtid_idr, dump_ep, epd); |
| 498 | idr_for_each(&epd->devp->atid_idr, dump_ep, epd); |
| 499 | idr_for_each(&epd->devp->stid_idr, dump_listen_ep, epd); |
| 500 | spin_unlock_irq(&epd->devp->lock); |
| 501 | |
| 502 | file->private_data = epd; |
| 503 | goto out; |
| 504 | err1: |
| 505 | kfree(epd); |
| 506 | out: |
| 507 | return ret; |
| 508 | } |
| 509 | |
| 510 | static const struct file_operations ep_debugfs_fops = { |
| 511 | .owner = THIS_MODULE, |
| 512 | .open = ep_open, |
| 513 | .release = ep_release, |
| 514 | .read = debugfs_read, |
| 515 | }; |
| 516 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 517 | static int setup_debugfs(struct c4iw_dev *devp) |
| 518 | { |
| 519 | struct dentry *de; |
| 520 | |
| 521 | if (!devp->debugfs_root) |
| 522 | return -1; |
| 523 | |
| 524 | de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root, |
| 525 | (void *)devp, &qp_debugfs_fops); |
| 526 | if (de && de->d_inode) |
| 527 | de->d_inode->i_size = 4096; |
Steve Wise | 9e8d1fa3 | 2010-09-10 11:15:20 -0500 | [diff] [blame] | 528 | |
| 529 | de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root, |
| 530 | (void *)devp, &stag_debugfs_fops); |
| 531 | if (de && de->d_inode) |
| 532 | de->d_inode->i_size = 4096; |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 533 | |
| 534 | de = debugfs_create_file("stats", S_IWUSR, devp->debugfs_root, |
| 535 | (void *)devp, &stats_debugfs_fops); |
| 536 | if (de && de->d_inode) |
| 537 | de->d_inode->i_size = 4096; |
| 538 | |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 539 | de = debugfs_create_file("eps", S_IWUSR, devp->debugfs_root, |
| 540 | (void *)devp, &ep_debugfs_fops); |
| 541 | if (de && de->d_inode) |
| 542 | de->d_inode->i_size = 4096; |
| 543 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev, |
| 548 | struct c4iw_dev_ucontext *uctx) |
| 549 | { |
| 550 | struct list_head *pos, *nxt; |
| 551 | struct c4iw_qid_list *entry; |
| 552 | |
| 553 | mutex_lock(&uctx->lock); |
| 554 | list_for_each_safe(pos, nxt, &uctx->qpids) { |
| 555 | entry = list_entry(pos, struct c4iw_qid_list, entry); |
| 556 | list_del_init(&entry->entry); |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 557 | if (!(entry->qid & rdev->qpmask)) { |
Vipul Pandya | ec3eead | 2012-05-18 15:29:32 +0530 | [diff] [blame] | 558 | c4iw_put_resource(&rdev->resource.qid_table, |
| 559 | entry->qid); |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 560 | mutex_lock(&rdev->stats.lock); |
| 561 | rdev->stats.qid.cur -= rdev->qpmask + 1; |
| 562 | mutex_unlock(&rdev->stats.lock); |
| 563 | } |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 564 | kfree(entry); |
| 565 | } |
| 566 | |
| 567 | list_for_each_safe(pos, nxt, &uctx->qpids) { |
| 568 | entry = list_entry(pos, struct c4iw_qid_list, entry); |
| 569 | list_del_init(&entry->entry); |
| 570 | kfree(entry); |
| 571 | } |
| 572 | mutex_unlock(&uctx->lock); |
| 573 | } |
| 574 | |
| 575 | void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, |
| 576 | struct c4iw_dev_ucontext *uctx) |
| 577 | { |
| 578 | INIT_LIST_HEAD(&uctx->qpids); |
| 579 | INIT_LIST_HEAD(&uctx->cqids); |
| 580 | mutex_init(&uctx->lock); |
| 581 | } |
| 582 | |
| 583 | /* Caller takes care of locking if needed */ |
| 584 | static int c4iw_rdev_open(struct c4iw_rdev *rdev) |
| 585 | { |
| 586 | int err; |
| 587 | |
| 588 | c4iw_init_dev_ucontext(rdev, &rdev->uctx); |
| 589 | |
| 590 | /* |
| 591 | * qpshift is the number of bits to shift the qpid left in order |
| 592 | * to get the correct address of the doorbell for that qp. |
| 593 | */ |
| 594 | rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density); |
| 595 | rdev->qpmask = rdev->lldi.udb_density - 1; |
| 596 | rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density); |
| 597 | rdev->cqmask = rdev->lldi.ucq_density - 1; |
| 598 | PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d " |
Steve Wise | 93fb72e | 2010-06-23 15:46:55 +0000 | [diff] [blame] | 599 | "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x " |
| 600 | "qp qid start %u size %u cq qid start %u size %u\n", |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 601 | __func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start, |
| 602 | rdev->lldi.vr->stag.size, c4iw_num_stags(rdev), |
| 603 | rdev->lldi.vr->pbl.start, |
| 604 | rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start, |
Steve Wise | 93fb72e | 2010-06-23 15:46:55 +0000 | [diff] [blame] | 605 | rdev->lldi.vr->rq.size, |
| 606 | rdev->lldi.vr->qp.start, |
| 607 | rdev->lldi.vr->qp.size, |
| 608 | rdev->lldi.vr->cq.start, |
| 609 | rdev->lldi.vr->cq.size); |
Ben Hutchings | 649fb5e | 2013-10-27 21:50:45 +0000 | [diff] [blame] | 610 | PDBG("udb len 0x%x udb base %llx db_reg %p gts_reg %p qpshift %lu " |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 611 | "qpmask 0x%x cqshift %lu cqmask 0x%x\n", |
| 612 | (unsigned)pci_resource_len(rdev->lldi.pdev, 2), |
Ben Hutchings | 649fb5e | 2013-10-27 21:50:45 +0000 | [diff] [blame] | 613 | (u64)pci_resource_start(rdev->lldi.pdev, 2), |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 614 | rdev->lldi.db_reg, |
| 615 | rdev->lldi.gts_reg, |
| 616 | rdev->qpshift, rdev->qpmask, |
| 617 | rdev->cqshift, rdev->cqmask); |
| 618 | |
| 619 | if (c4iw_num_stags(rdev) == 0) { |
| 620 | err = -EINVAL; |
| 621 | goto err1; |
| 622 | } |
| 623 | |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 624 | rdev->stats.pd.total = T4_MAX_NUM_PD; |
| 625 | rdev->stats.stag.total = rdev->lldi.vr->stag.size; |
| 626 | rdev->stats.pbl.total = rdev->lldi.vr->pbl.size; |
| 627 | rdev->stats.rqt.total = rdev->lldi.vr->rq.size; |
| 628 | rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size; |
| 629 | rdev->stats.qid.total = rdev->lldi.vr->qp.size; |
| 630 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 631 | err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD); |
| 632 | if (err) { |
| 633 | printk(KERN_ERR MOD "error %d initializing resources\n", err); |
| 634 | goto err1; |
| 635 | } |
| 636 | err = c4iw_pblpool_create(rdev); |
| 637 | if (err) { |
| 638 | printk(KERN_ERR MOD "error %d initializing pbl pool\n", err); |
| 639 | goto err2; |
| 640 | } |
| 641 | err = c4iw_rqtpool_create(rdev); |
| 642 | if (err) { |
| 643 | printk(KERN_ERR MOD "error %d initializing rqt pool\n", err); |
| 644 | goto err3; |
| 645 | } |
Steve Wise | c6d7b26 | 2010-09-13 11:23:57 -0500 | [diff] [blame] | 646 | err = c4iw_ocqp_pool_create(rdev); |
| 647 | if (err) { |
| 648 | printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err); |
| 649 | goto err4; |
| 650 | } |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 651 | rdev->status_page = (struct t4_dev_status_page *) |
| 652 | __get_free_page(GFP_KERNEL); |
| 653 | if (!rdev->status_page) { |
| 654 | pr_err(MOD "error allocating status page\n"); |
| 655 | goto err4; |
| 656 | } |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 657 | return 0; |
Steve Wise | c6d7b26 | 2010-09-13 11:23:57 -0500 | [diff] [blame] | 658 | err4: |
| 659 | c4iw_rqtpool_destroy(rdev); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 660 | err3: |
| 661 | c4iw_pblpool_destroy(rdev); |
| 662 | err2: |
| 663 | c4iw_destroy_resource(&rdev->resource); |
| 664 | err1: |
| 665 | return err; |
| 666 | } |
| 667 | |
| 668 | static void c4iw_rdev_close(struct c4iw_rdev *rdev) |
| 669 | { |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 670 | free_page((unsigned long)rdev->status_page); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 671 | c4iw_pblpool_destroy(rdev); |
| 672 | c4iw_rqtpool_destroy(rdev); |
| 673 | c4iw_destroy_resource(&rdev->resource); |
| 674 | } |
| 675 | |
Steve Wise | 9efe10a | 2011-10-06 09:32:44 -0700 | [diff] [blame] | 676 | static void c4iw_dealloc(struct uld_ctx *ctx) |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 677 | { |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 678 | c4iw_rdev_close(&ctx->dev->rdev); |
| 679 | idr_destroy(&ctx->dev->cqidr); |
| 680 | idr_destroy(&ctx->dev->qpidr); |
| 681 | idr_destroy(&ctx->dev->mmidr); |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 682 | idr_destroy(&ctx->dev->hwtid_idr); |
| 683 | idr_destroy(&ctx->dev->stid_idr); |
| 684 | idr_destroy(&ctx->dev->atid_idr); |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 685 | iounmap(ctx->dev->rdev.oc_mw_kva); |
| 686 | ib_dealloc_device(&ctx->dev->ibdev); |
| 687 | ctx->dev = NULL; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 688 | } |
| 689 | |
Steve Wise | 9efe10a | 2011-10-06 09:32:44 -0700 | [diff] [blame] | 690 | static void c4iw_remove(struct uld_ctx *ctx) |
| 691 | { |
| 692 | PDBG("%s c4iw_dev %p\n", __func__, ctx->dev); |
| 693 | c4iw_unregister_device(ctx->dev); |
| 694 | c4iw_dealloc(ctx); |
| 695 | } |
| 696 | |
| 697 | static int rdma_supported(const struct cxgb4_lld_info *infop) |
| 698 | { |
| 699 | return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 && |
| 700 | infop->vr->rq.size > 0 && infop->vr->qp.size > 0 && |
Vipul Pandya | f079af7 | 2013-03-14 05:08:58 +0000 | [diff] [blame] | 701 | infop->vr->cq.size > 0; |
Steve Wise | 9efe10a | 2011-10-06 09:32:44 -0700 | [diff] [blame] | 702 | } |
| 703 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 704 | static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop) |
| 705 | { |
| 706 | struct c4iw_dev *devp; |
| 707 | int ret; |
| 708 | |
Steve Wise | 9efe10a | 2011-10-06 09:32:44 -0700 | [diff] [blame] | 709 | if (!rdma_supported(infop)) { |
| 710 | printk(KERN_INFO MOD "%s: RDMA not supported on this device.\n", |
| 711 | pci_name(infop->pdev)); |
| 712 | return ERR_PTR(-ENOSYS); |
| 713 | } |
Vipul Pandya | f079af7 | 2013-03-14 05:08:58 +0000 | [diff] [blame] | 714 | if (!ocqp_supported(infop)) |
| 715 | pr_info("%s: On-Chip Queues not supported on this device.\n", |
| 716 | pci_name(infop->pdev)); |
Vipul Pandya | 80ccdd6 | 2013-03-14 05:09:00 +0000 | [diff] [blame] | 717 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 718 | devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp)); |
| 719 | if (!devp) { |
| 720 | printk(KERN_ERR MOD "Cannot allocate ib device\n"); |
Steve Wise | bbe9a0a | 2011-05-09 22:06:22 -0700 | [diff] [blame] | 721 | return ERR_PTR(-ENOMEM); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 722 | } |
| 723 | devp->rdev.lldi = *infop; |
| 724 | |
Steve Wise | c6d7b26 | 2010-09-13 11:23:57 -0500 | [diff] [blame] | 725 | devp->rdev.oc_mw_pa = pci_resource_start(devp->rdev.lldi.pdev, 2) + |
| 726 | (pci_resource_len(devp->rdev.lldi.pdev, 2) - |
| 727 | roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size)); |
| 728 | devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa, |
| 729 | devp->rdev.lldi.vr->ocq.size); |
| 730 | |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 731 | PDBG(KERN_INFO MOD "ocq memory: " |
Steve Wise | c6d7b26 | 2010-09-13 11:23:57 -0500 | [diff] [blame] | 732 | "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n", |
| 733 | devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size, |
| 734 | devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva); |
| 735 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 736 | ret = c4iw_rdev_open(&devp->rdev); |
| 737 | if (ret) { |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 738 | printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret); |
| 739 | ib_dealloc_device(&devp->ibdev); |
Steve Wise | bbe9a0a | 2011-05-09 22:06:22 -0700 | [diff] [blame] | 740 | return ERR_PTR(ret); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | idr_init(&devp->cqidr); |
| 744 | idr_init(&devp->qpidr); |
| 745 | idr_init(&devp->mmidr); |
Vipul Pandya | 793dad9 | 2012-12-10 09:30:56 +0000 | [diff] [blame] | 746 | idr_init(&devp->hwtid_idr); |
| 747 | idr_init(&devp->stid_idr); |
| 748 | idr_init(&devp->atid_idr); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 749 | spin_lock_init(&devp->lock); |
Vipul Pandya | 8d81ef3 | 2012-05-18 15:29:27 +0530 | [diff] [blame] | 750 | mutex_init(&devp->rdev.stats.lock); |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 751 | mutex_init(&devp->db_mutex); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 752 | INIT_LIST_HEAD(&devp->db_fc_list); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 753 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 754 | if (c4iw_debugfs_root) { |
| 755 | devp->debugfs_root = debugfs_create_dir( |
| 756 | pci_name(devp->rdev.lldi.pdev), |
| 757 | c4iw_debugfs_root); |
| 758 | setup_debugfs(devp); |
| 759 | } |
| 760 | return devp; |
| 761 | } |
| 762 | |
| 763 | static void *c4iw_uld_add(const struct cxgb4_lld_info *infop) |
| 764 | { |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 765 | struct uld_ctx *ctx; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 766 | static int vers_printed; |
| 767 | int i; |
| 768 | |
| 769 | if (!vers_printed++) |
Vipul Pandya | f079af7 | 2013-03-14 05:08:58 +0000 | [diff] [blame] | 770 | pr_info("Chelsio T4/T5 RDMA Driver - version %s\n", |
| 771 | DRV_VERSION); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 772 | |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 773 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
| 774 | if (!ctx) { |
| 775 | ctx = ERR_PTR(-ENOMEM); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 776 | goto out; |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 777 | } |
| 778 | ctx->lldi = *infop; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 779 | |
| 780 | PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n", |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 781 | __func__, pci_name(ctx->lldi.pdev), |
| 782 | ctx->lldi.nchan, ctx->lldi.nrxq, |
| 783 | ctx->lldi.ntxq, ctx->lldi.nports); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 784 | |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 785 | mutex_lock(&dev_mutex); |
| 786 | list_add_tail(&ctx->entry, &uld_ctx_list); |
| 787 | mutex_unlock(&dev_mutex); |
| 788 | |
| 789 | for (i = 0; i < ctx->lldi.nrxq; i++) |
| 790 | PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 791 | out: |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 792 | return ctx; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 793 | } |
| 794 | |
Vipul Pandya | 1cab775 | 2012-12-10 09:30:55 +0000 | [diff] [blame] | 795 | static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl, |
| 796 | const __be64 *rsp, |
| 797 | u32 pktshift) |
| 798 | { |
| 799 | struct sk_buff *skb; |
| 800 | |
| 801 | /* |
| 802 | * Allocate space for cpl_pass_accept_req which will be synthesized by |
| 803 | * driver. Once the driver synthesizes the request the skb will go |
| 804 | * through the regular cpl_pass_accept_req processing. |
| 805 | * The math here assumes sizeof cpl_pass_accept_req >= sizeof |
| 806 | * cpl_rx_pkt. |
| 807 | */ |
| 808 | skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) + |
| 809 | sizeof(struct rss_header) - pktshift, GFP_ATOMIC); |
| 810 | if (unlikely(!skb)) |
| 811 | return NULL; |
| 812 | |
| 813 | __skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) + |
| 814 | sizeof(struct rss_header) - pktshift); |
| 815 | |
| 816 | /* |
| 817 | * This skb will contain: |
| 818 | * rss_header from the rspq descriptor (1 flit) |
| 819 | * cpl_rx_pkt struct from the rspq descriptor (2 flits) |
| 820 | * space for the difference between the size of an |
| 821 | * rx_pkt and pass_accept_req cpl (1 flit) |
| 822 | * the packet data from the gl |
| 823 | */ |
| 824 | skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) + |
| 825 | sizeof(struct rss_header)); |
| 826 | skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) + |
| 827 | sizeof(struct cpl_pass_accept_req), |
| 828 | gl->va + pktshift, |
| 829 | gl->tot_len - pktshift); |
| 830 | return skb; |
| 831 | } |
| 832 | |
| 833 | static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl, |
| 834 | const __be64 *rsp) |
| 835 | { |
| 836 | unsigned int opcode = *(u8 *)rsp; |
| 837 | struct sk_buff *skb; |
| 838 | |
| 839 | if (opcode != CPL_RX_PKT) |
| 840 | goto out; |
| 841 | |
| 842 | skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift); |
| 843 | if (skb == NULL) |
| 844 | goto out; |
| 845 | |
| 846 | if (c4iw_handlers[opcode] == NULL) { |
| 847 | pr_info("%s no handler opcode 0x%x...\n", __func__, |
| 848 | opcode); |
| 849 | kfree_skb(skb); |
| 850 | goto out; |
| 851 | } |
| 852 | c4iw_handlers[opcode](dev, skb); |
| 853 | return 1; |
| 854 | out: |
| 855 | return 0; |
| 856 | } |
| 857 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 858 | static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp, |
| 859 | const struct pkt_gl *gl) |
| 860 | { |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 861 | struct uld_ctx *ctx = handle; |
| 862 | struct c4iw_dev *dev = ctx->dev; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 863 | struct sk_buff *skb; |
Vipul Pandya | 1cab775 | 2012-12-10 09:30:55 +0000 | [diff] [blame] | 864 | u8 opcode; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 865 | |
| 866 | if (gl == NULL) { |
| 867 | /* omit RSS and rsp_ctrl at end of descriptor */ |
| 868 | unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; |
| 869 | |
| 870 | skb = alloc_skb(256, GFP_ATOMIC); |
| 871 | if (!skb) |
| 872 | goto nomem; |
| 873 | __skb_put(skb, len); |
| 874 | skb_copy_to_linear_data(skb, &rsp[1], len); |
| 875 | } else if (gl == CXGB4_MSG_AN) { |
| 876 | const struct rsp_ctrl *rc = (void *)rsp; |
| 877 | |
| 878 | u32 qid = be32_to_cpu(rc->pldbuflen_qid); |
| 879 | c4iw_ev_handler(dev, qid); |
| 880 | return 0; |
Vipul Pandya | 1cab775 | 2012-12-10 09:30:55 +0000 | [diff] [blame] | 881 | } else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) { |
| 882 | if (recv_rx_pkt(dev, gl, rsp)) |
| 883 | return 0; |
| 884 | |
| 885 | pr_info("%s: unexpected FL contents at %p, " \ |
| 886 | "RSS %#llx, FL %#llx, len %u\n", |
| 887 | pci_name(ctx->lldi.pdev), gl->va, |
| 888 | (unsigned long long)be64_to_cpu(*rsp), |
Vipul Pandya | ef5d635 | 2013-01-07 13:12:00 +0000 | [diff] [blame] | 889 | (unsigned long long)be64_to_cpu( |
| 890 | *(__force __be64 *)gl->va), |
Vipul Pandya | 1cab775 | 2012-12-10 09:30:55 +0000 | [diff] [blame] | 891 | gl->tot_len); |
| 892 | |
| 893 | return 0; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 894 | } else { |
Steve Wise | da411ba | 2010-10-18 15:16:45 +0000 | [diff] [blame] | 895 | skb = cxgb4_pktgl_to_skb(gl, 128, 128); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 896 | if (unlikely(!skb)) |
| 897 | goto nomem; |
| 898 | } |
| 899 | |
Vipul Pandya | 1cab775 | 2012-12-10 09:30:55 +0000 | [diff] [blame] | 900 | opcode = *(u8 *)rsp; |
Steve Wise | dbb084c | 2014-03-21 20:40:30 +0530 | [diff] [blame] | 901 | if (c4iw_handlers[opcode]) { |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 902 | c4iw_handlers[opcode](dev, skb); |
Steve Wise | dbb084c | 2014-03-21 20:40:30 +0530 | [diff] [blame] | 903 | } else { |
Vipul Pandya | 1cab775 | 2012-12-10 09:30:55 +0000 | [diff] [blame] | 904 | pr_info("%s no handler opcode 0x%x...\n", __func__, |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 905 | opcode); |
Steve Wise | dbb084c | 2014-03-21 20:40:30 +0530 | [diff] [blame] | 906 | kfree_skb(skb); |
| 907 | } |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 908 | |
| 909 | return 0; |
| 910 | nomem: |
| 911 | return -1; |
| 912 | } |
| 913 | |
| 914 | static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state) |
| 915 | { |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 916 | struct uld_ctx *ctx = handle; |
Steve Wise | 1c01c53 | 2010-05-20 16:57:32 -0500 | [diff] [blame] | 917 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 918 | PDBG("%s new_state %u\n", __func__, new_state); |
Steve Wise | 1c01c53 | 2010-05-20 16:57:32 -0500 | [diff] [blame] | 919 | switch (new_state) { |
| 920 | case CXGB4_STATE_UP: |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 921 | printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev)); |
| 922 | if (!ctx->dev) { |
Steve Wise | 9efe10a | 2011-10-06 09:32:44 -0700 | [diff] [blame] | 923 | int ret; |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 924 | |
| 925 | ctx->dev = c4iw_alloc(&ctx->lldi); |
Steve Wise | 9efe10a | 2011-10-06 09:32:44 -0700 | [diff] [blame] | 926 | if (IS_ERR(ctx->dev)) { |
| 927 | printk(KERN_ERR MOD |
| 928 | "%s: initialization failed: %ld\n", |
| 929 | pci_name(ctx->lldi.pdev), |
| 930 | PTR_ERR(ctx->dev)); |
| 931 | ctx->dev = NULL; |
| 932 | break; |
| 933 | } |
| 934 | ret = c4iw_register_device(ctx->dev); |
| 935 | if (ret) { |
Steve Wise | 1c01c53 | 2010-05-20 16:57:32 -0500 | [diff] [blame] | 936 | printk(KERN_ERR MOD |
| 937 | "%s: RDMA registration failed: %d\n", |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 938 | pci_name(ctx->lldi.pdev), ret); |
Steve Wise | 9efe10a | 2011-10-06 09:32:44 -0700 | [diff] [blame] | 939 | c4iw_dealloc(ctx); |
| 940 | } |
Steve Wise | 1c01c53 | 2010-05-20 16:57:32 -0500 | [diff] [blame] | 941 | } |
| 942 | break; |
| 943 | case CXGB4_STATE_DOWN: |
| 944 | printk(KERN_INFO MOD "%s: Down\n", |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 945 | pci_name(ctx->lldi.pdev)); |
| 946 | if (ctx->dev) |
| 947 | c4iw_remove(ctx); |
Steve Wise | 1c01c53 | 2010-05-20 16:57:32 -0500 | [diff] [blame] | 948 | break; |
| 949 | case CXGB4_STATE_START_RECOVERY: |
| 950 | printk(KERN_INFO MOD "%s: Fatal Error\n", |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 951 | pci_name(ctx->lldi.pdev)); |
| 952 | if (ctx->dev) { |
Steve Wise | 767fbe8 | 2011-03-11 22:30:53 +0000 | [diff] [blame] | 953 | struct ib_event event; |
| 954 | |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 955 | ctx->dev->rdev.flags |= T4_FATAL_ERROR; |
Steve Wise | 767fbe8 | 2011-03-11 22:30:53 +0000 | [diff] [blame] | 956 | memset(&event, 0, sizeof event); |
| 957 | event.event = IB_EVENT_DEVICE_FATAL; |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 958 | event.device = &ctx->dev->ibdev; |
Steve Wise | 767fbe8 | 2011-03-11 22:30:53 +0000 | [diff] [blame] | 959 | ib_dispatch_event(&event); |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 960 | c4iw_remove(ctx); |
Steve Wise | 767fbe8 | 2011-03-11 22:30:53 +0000 | [diff] [blame] | 961 | } |
Steve Wise | 1c01c53 | 2010-05-20 16:57:32 -0500 | [diff] [blame] | 962 | break; |
| 963 | case CXGB4_STATE_DETACH: |
| 964 | printk(KERN_INFO MOD "%s: Detach\n", |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 965 | pci_name(ctx->lldi.pdev)); |
| 966 | if (ctx->dev) |
| 967 | c4iw_remove(ctx); |
Steve Wise | 1c01c53 | 2010-05-20 16:57:32 -0500 | [diff] [blame] | 968 | break; |
| 969 | } |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 970 | return 0; |
| 971 | } |
| 972 | |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 973 | static int disable_qp_db(int id, void *p, void *data) |
| 974 | { |
| 975 | struct c4iw_qp *qp = p; |
| 976 | |
| 977 | t4_disable_wq_db(&qp->wq); |
| 978 | return 0; |
| 979 | } |
| 980 | |
| 981 | static void stop_queues(struct uld_ctx *ctx) |
| 982 | { |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 983 | unsigned long flags; |
| 984 | |
| 985 | spin_lock_irqsave(&ctx->dev->lock, flags); |
| 986 | ctx->dev->rdev.stats.db_state_transitions++; |
| 987 | ctx->dev->db_state = STOPPED; |
| 988 | if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 989 | idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 990 | else |
| 991 | ctx->dev->rdev.status_page->db_off = 1; |
| 992 | spin_unlock_irqrestore(&ctx->dev->lock, flags); |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | static int enable_qp_db(int id, void *p, void *data) |
| 996 | { |
| 997 | struct c4iw_qp *qp = p; |
| 998 | |
| 999 | t4_enable_wq_db(&qp->wq); |
| 1000 | return 0; |
| 1001 | } |
| 1002 | |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1003 | static void resume_rc_qp(struct c4iw_qp *qp) |
| 1004 | { |
| 1005 | spin_lock(&qp->lock); |
| 1006 | t4_ring_sq_db(&qp->wq, qp->wq.sq.wq_pidx_inc); |
| 1007 | qp->wq.sq.wq_pidx_inc = 0; |
| 1008 | t4_ring_rq_db(&qp->wq, qp->wq.rq.wq_pidx_inc); |
| 1009 | qp->wq.rq.wq_pidx_inc = 0; |
| 1010 | spin_unlock(&qp->lock); |
| 1011 | } |
| 1012 | |
| 1013 | static void resume_a_chunk(struct uld_ctx *ctx) |
| 1014 | { |
| 1015 | int i; |
| 1016 | struct c4iw_qp *qp; |
| 1017 | |
| 1018 | for (i = 0; i < DB_FC_RESUME_SIZE; i++) { |
| 1019 | qp = list_first_entry(&ctx->dev->db_fc_list, struct c4iw_qp, |
| 1020 | db_fc_entry); |
| 1021 | list_del_init(&qp->db_fc_entry); |
| 1022 | resume_rc_qp(qp); |
| 1023 | if (list_empty(&ctx->dev->db_fc_list)) |
| 1024 | break; |
| 1025 | } |
| 1026 | } |
| 1027 | |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 1028 | static void resume_queues(struct uld_ctx *ctx) |
| 1029 | { |
| 1030 | spin_lock_irq(&ctx->dev->lock); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1031 | if (ctx->dev->db_state != STOPPED) |
| 1032 | goto out; |
| 1033 | ctx->dev->db_state = FLOW_CONTROL; |
| 1034 | while (1) { |
| 1035 | if (list_empty(&ctx->dev->db_fc_list)) { |
| 1036 | WARN_ON(ctx->dev->db_state != FLOW_CONTROL); |
| 1037 | ctx->dev->db_state = NORMAL; |
| 1038 | ctx->dev->rdev.stats.db_state_transitions++; |
| 1039 | if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) { |
| 1040 | idr_for_each(&ctx->dev->qpidr, enable_qp_db, |
| 1041 | NULL); |
| 1042 | } else { |
| 1043 | ctx->dev->rdev.status_page->db_off = 0; |
| 1044 | } |
| 1045 | break; |
| 1046 | } else { |
| 1047 | if (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1) |
| 1048 | < (ctx->dev->rdev.lldi.dbfifo_int_thresh << |
| 1049 | DB_FC_DRAIN_THRESH)) { |
| 1050 | resume_a_chunk(ctx); |
| 1051 | } |
| 1052 | if (!list_empty(&ctx->dev->db_fc_list)) { |
| 1053 | spin_unlock_irq(&ctx->dev->lock); |
| 1054 | if (DB_FC_RESUME_DELAY) { |
| 1055 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1056 | schedule_timeout(DB_FC_RESUME_DELAY); |
| 1057 | } |
| 1058 | spin_lock_irq(&ctx->dev->lock); |
| 1059 | if (ctx->dev->db_state != FLOW_CONTROL) |
| 1060 | break; |
| 1061 | } |
| 1062 | } |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1063 | } |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1064 | out: |
| 1065 | if (ctx->dev->db_state != NORMAL) |
| 1066 | ctx->dev->rdev.stats.db_fc_interruptions++; |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 1067 | spin_unlock_irq(&ctx->dev->lock); |
| 1068 | } |
| 1069 | |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1070 | struct qp_list { |
| 1071 | unsigned idx; |
| 1072 | struct c4iw_qp **qps; |
| 1073 | }; |
| 1074 | |
| 1075 | static int add_and_ref_qp(int id, void *p, void *data) |
| 1076 | { |
| 1077 | struct qp_list *qp_listp = data; |
| 1078 | struct c4iw_qp *qp = p; |
| 1079 | |
| 1080 | c4iw_qp_add_ref(&qp->ibqp); |
| 1081 | qp_listp->qps[qp_listp->idx++] = qp; |
| 1082 | return 0; |
| 1083 | } |
| 1084 | |
| 1085 | static int count_qps(int id, void *p, void *data) |
| 1086 | { |
| 1087 | unsigned *countp = data; |
| 1088 | (*countp)++; |
| 1089 | return 0; |
| 1090 | } |
| 1091 | |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1092 | static void deref_qps(struct qp_list *qp_list) |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1093 | { |
| 1094 | int idx; |
| 1095 | |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1096 | for (idx = 0; idx < qp_list->idx; idx++) |
| 1097 | c4iw_qp_rem_ref(&qp_list->qps[idx]->ibqp); |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1098 | } |
| 1099 | |
| 1100 | static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list) |
| 1101 | { |
| 1102 | int idx; |
| 1103 | int ret; |
| 1104 | |
| 1105 | for (idx = 0; idx < qp_list->idx; idx++) { |
| 1106 | struct c4iw_qp *qp = qp_list->qps[idx]; |
| 1107 | |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1108 | spin_lock_irq(&qp->rhp->lock); |
| 1109 | spin_lock(&qp->lock); |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1110 | ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0], |
| 1111 | qp->wq.sq.qid, |
| 1112 | t4_sq_host_wq_pidx(&qp->wq), |
| 1113 | t4_sq_wq_size(&qp->wq)); |
| 1114 | if (ret) { |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1115 | pr_err(KERN_ERR MOD "%s: Fatal error - " |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1116 | "DB overflow recovery failed - " |
| 1117 | "error syncing SQ qid %u\n", |
| 1118 | pci_name(ctx->lldi.pdev), qp->wq.sq.qid); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1119 | spin_unlock(&qp->lock); |
| 1120 | spin_unlock_irq(&qp->rhp->lock); |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1121 | return; |
| 1122 | } |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1123 | qp->wq.sq.wq_pidx_inc = 0; |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1124 | |
| 1125 | ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0], |
| 1126 | qp->wq.rq.qid, |
| 1127 | t4_rq_host_wq_pidx(&qp->wq), |
| 1128 | t4_rq_wq_size(&qp->wq)); |
| 1129 | |
| 1130 | if (ret) { |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1131 | pr_err(KERN_ERR MOD "%s: Fatal error - " |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1132 | "DB overflow recovery failed - " |
| 1133 | "error syncing RQ qid %u\n", |
| 1134 | pci_name(ctx->lldi.pdev), qp->wq.rq.qid); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1135 | spin_unlock(&qp->lock); |
| 1136 | spin_unlock_irq(&qp->rhp->lock); |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1137 | return; |
| 1138 | } |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1139 | qp->wq.rq.wq_pidx_inc = 0; |
| 1140 | spin_unlock(&qp->lock); |
| 1141 | spin_unlock_irq(&qp->rhp->lock); |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1142 | |
| 1143 | /* Wait for the dbfifo to drain */ |
| 1144 | while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) { |
| 1145 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1146 | schedule_timeout(usecs_to_jiffies(10)); |
| 1147 | } |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | static void recover_queues(struct uld_ctx *ctx) |
| 1152 | { |
| 1153 | int count = 0; |
| 1154 | struct qp_list qp_list; |
| 1155 | int ret; |
| 1156 | |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1157 | /* slow everybody down */ |
| 1158 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1159 | schedule_timeout(usecs_to_jiffies(1000)); |
| 1160 | |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1161 | /* flush the SGE contexts */ |
| 1162 | ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]); |
| 1163 | if (ret) { |
| 1164 | printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n", |
| 1165 | pci_name(ctx->lldi.pdev)); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1166 | return; |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1167 | } |
| 1168 | |
| 1169 | /* Count active queues so we can build a list of queues to recover */ |
| 1170 | spin_lock_irq(&ctx->dev->lock); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1171 | WARN_ON(ctx->dev->db_state != STOPPED); |
| 1172 | ctx->dev->db_state = RECOVERY; |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1173 | idr_for_each(&ctx->dev->qpidr, count_qps, &count); |
| 1174 | |
| 1175 | qp_list.qps = kzalloc(count * sizeof *qp_list.qps, GFP_ATOMIC); |
| 1176 | if (!qp_list.qps) { |
| 1177 | printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n", |
| 1178 | pci_name(ctx->lldi.pdev)); |
| 1179 | spin_unlock_irq(&ctx->dev->lock); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1180 | return; |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1181 | } |
| 1182 | qp_list.idx = 0; |
| 1183 | |
| 1184 | /* add and ref each qp so it doesn't get freed */ |
| 1185 | idr_for_each(&ctx->dev->qpidr, add_and_ref_qp, &qp_list); |
| 1186 | |
| 1187 | spin_unlock_irq(&ctx->dev->lock); |
| 1188 | |
| 1189 | /* now traverse the list in a safe context to recover the db state*/ |
| 1190 | recover_lost_dbs(ctx, &qp_list); |
| 1191 | |
| 1192 | /* we're almost done! deref the qps and clean up */ |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1193 | deref_qps(&qp_list); |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1194 | kfree(qp_list.qps); |
| 1195 | |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1196 | spin_lock_irq(&ctx->dev->lock); |
Steve Wise | 05eb238 | 2014-03-14 21:52:08 +0530 | [diff] [blame] | 1197 | WARN_ON(ctx->dev->db_state != RECOVERY); |
| 1198 | ctx->dev->db_state = STOPPED; |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1199 | spin_unlock_irq(&ctx->dev->lock); |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1200 | } |
| 1201 | |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 1202 | static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...) |
| 1203 | { |
| 1204 | struct uld_ctx *ctx = handle; |
| 1205 | |
| 1206 | switch (control) { |
| 1207 | case CXGB4_CONTROL_DB_FULL: |
| 1208 | stop_queues(ctx); |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 1209 | ctx->dev->rdev.stats.db_full++; |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 1210 | break; |
| 1211 | case CXGB4_CONTROL_DB_EMPTY: |
| 1212 | resume_queues(ctx); |
| 1213 | mutex_lock(&ctx->dev->rdev.stats.lock); |
| 1214 | ctx->dev->rdev.stats.db_empty++; |
| 1215 | mutex_unlock(&ctx->dev->rdev.stats.lock); |
| 1216 | break; |
| 1217 | case CXGB4_CONTROL_DB_DROP: |
Vipul Pandya | 422eea0 | 2012-05-18 15:29:30 +0530 | [diff] [blame] | 1218 | recover_queues(ctx); |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 1219 | mutex_lock(&ctx->dev->rdev.stats.lock); |
| 1220 | ctx->dev->rdev.stats.db_drop++; |
| 1221 | mutex_unlock(&ctx->dev->rdev.stats.lock); |
| 1222 | break; |
| 1223 | default: |
| 1224 | printk(KERN_WARNING MOD "%s: unknown control cmd %u\n", |
| 1225 | pci_name(ctx->lldi.pdev), control); |
| 1226 | break; |
| 1227 | } |
| 1228 | return 0; |
| 1229 | } |
| 1230 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 1231 | static struct cxgb4_uld_info c4iw_uld_info = { |
| 1232 | .name = DRV_NAME, |
| 1233 | .add = c4iw_uld_add, |
| 1234 | .rx_handler = c4iw_uld_rx_handler, |
| 1235 | .state_change = c4iw_uld_state_change, |
Vipul Pandya | 2c97478 | 2012-05-18 15:29:28 +0530 | [diff] [blame] | 1236 | .control = c4iw_uld_control, |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 1237 | }; |
| 1238 | |
| 1239 | static int __init c4iw_init_module(void) |
| 1240 | { |
| 1241 | int err; |
| 1242 | |
| 1243 | err = c4iw_cm_init(); |
| 1244 | if (err) |
| 1245 | return err; |
| 1246 | |
| 1247 | c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL); |
| 1248 | if (!c4iw_debugfs_root) |
| 1249 | printk(KERN_WARNING MOD |
| 1250 | "could not create debugfs entry, continuing\n"); |
| 1251 | |
| 1252 | cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info); |
| 1253 | |
| 1254 | return 0; |
| 1255 | } |
| 1256 | |
| 1257 | static void __exit c4iw_exit_module(void) |
| 1258 | { |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 1259 | struct uld_ctx *ctx, *tmp; |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 1260 | |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 1261 | mutex_lock(&dev_mutex); |
Steve Wise | 2f25e9a | 2011-05-09 22:06:23 -0700 | [diff] [blame] | 1262 | list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) { |
| 1263 | if (ctx->dev) |
| 1264 | c4iw_remove(ctx); |
| 1265 | kfree(ctx); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 1266 | } |
| 1267 | mutex_unlock(&dev_mutex); |
Steve Wise | fd388ce | 2010-05-20 16:57:27 -0500 | [diff] [blame] | 1268 | cxgb4_unregister_uld(CXGB4_ULD_RDMA); |
Steve Wise | cfdda9d | 2010-04-21 15:30:06 -0700 | [diff] [blame] | 1269 | c4iw_cm_term(); |
| 1270 | debugfs_remove_recursive(c4iw_debugfs_root); |
| 1271 | } |
| 1272 | |
| 1273 | module_init(c4iw_init_module); |
| 1274 | module_exit(c4iw_exit_module); |