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Commit | Line | Data |
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65e7ae7b OG |
1 | /* |
2 | * iSCSI Initiator over iSER Data-Path | |
3 | * | |
4 | * Copyright (C) 2004 Dmitry Yusupov | |
5 | * Copyright (C) 2004 Alex Aizman | |
6 | * Copyright (C) 2005 Mike Christie | |
7 | * Copyright (c) 2005, 2006 Voltaire, Inc. All rights reserved. | |
3ee07d27 | 8 | * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved. |
65e7ae7b OG |
9 | * maintained by openib-general@openib.org |
10 | * | |
11 | * This software is available to you under a choice of one of two | |
12 | * licenses. You may choose to be licensed under the terms of the GNU | |
13 | * General Public License (GPL) Version 2, available from the file | |
14 | * COPYING in the main directory of this source tree, or the | |
15 | * OpenIB.org BSD license below: | |
16 | * | |
17 | * Redistribution and use in source and binary forms, with or | |
18 | * without modification, are permitted provided that the following | |
19 | * conditions are met: | |
20 | * | |
21 | * - Redistributions of source code must retain the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer. | |
24 | * | |
25 | * - Redistributions in binary form must reproduce the above | |
26 | * copyright notice, this list of conditions and the following | |
27 | * disclaimer in the documentation and/or other materials | |
28 | * provided with the distribution. | |
29 | * | |
30 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
31 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
32 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
33 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
34 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
35 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
36 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
37 | * SOFTWARE. | |
38 | * | |
39 | * Credits: | |
40 | * Christoph Hellwig | |
41 | * FUJITA Tomonori | |
42 | * Arne Redlich | |
43 | * Zhenyu Wang | |
44 | * Modified by: | |
45 | * Erez Zilber | |
65e7ae7b OG |
46 | */ |
47 | ||
48 | #include <linux/types.h> | |
49 | #include <linux/list.h> | |
50 | #include <linux/hardirq.h> | |
51 | #include <linux/kfifo.h> | |
52 | #include <linux/blkdev.h> | |
53 | #include <linux/init.h> | |
54 | #include <linux/ioctl.h> | |
65e7ae7b OG |
55 | #include <linux/cdev.h> |
56 | #include <linux/in.h> | |
57 | #include <linux/net.h> | |
58 | #include <linux/scatterlist.h> | |
59 | #include <linux/delay.h> | |
5a0e3ad6 | 60 | #include <linux/slab.h> |
e4dd23d7 | 61 | #include <linux/module.h> |
65e7ae7b OG |
62 | |
63 | #include <net/sock.h> | |
64 | ||
65 | #include <asm/uaccess.h> | |
66 | ||
67 | #include <scsi/scsi_cmnd.h> | |
68 | #include <scsi/scsi_device.h> | |
69 | #include <scsi/scsi_eh.h> | |
70 | #include <scsi/scsi_tcq.h> | |
71 | #include <scsi/scsi_host.h> | |
72 | #include <scsi/scsi.h> | |
73 | #include <scsi/scsi_transport_iscsi.h> | |
74 | ||
75 | #include "iscsi_iser.h" | |
76 | ||
75613521 MC |
77 | static struct scsi_host_template iscsi_iser_sht; |
78 | static struct iscsi_transport iscsi_iser_transport; | |
79 | static struct scsi_transport_template *iscsi_iser_scsi_transport; | |
80 | ||
65e7ae7b OG |
81 | static unsigned int iscsi_max_lun = 512; |
82 | module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); | |
83 | ||
84 | int iser_debug_level = 0; | |
7f733847 AT |
85 | bool iser_pi_enable = false; |
86 | int iser_pi_guard = 0; | |
65e7ae7b | 87 | |
c1d786e6 | 88 | MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover"); |
65e7ae7b OG |
89 | MODULE_LICENSE("Dual BSD/GPL"); |
90 | MODULE_AUTHOR("Alex Nezhinsky, Dan Bar Dov, Or Gerlitz"); | |
c1d786e6 | 91 | MODULE_VERSION(DRV_VER); |
65e7ae7b OG |
92 | |
93 | module_param_named(debug_level, iser_debug_level, int, 0644); | |
94 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)"); | |
95 | ||
7f733847 AT |
96 | module_param_named(pi_enable, iser_pi_enable, bool, 0644); |
97 | MODULE_PARM_DESC(pi_enable, "Enable T10-PI offload support (default:disabled)"); | |
98 | ||
99 | module_param_named(pi_guard, iser_pi_guard, int, 0644); | |
100 | MODULE_PARM_DESC(pi_guard, "T10-PI guard_type, 0:CRC|1:IP_CSUM (default:CRC)"); | |
101 | ||
b73c3ada | 102 | static struct workqueue_struct *release_wq; |
65e7ae7b OG |
103 | struct iser_global ig; |
104 | ||
105 | void | |
106 | iscsi_iser_recv(struct iscsi_conn *conn, | |
107 | struct iscsi_hdr *hdr, char *rx_data, int rx_data_len) | |
108 | { | |
109 | int rc = 0; | |
65e7ae7b OG |
110 | int datalen; |
111 | int ahslen; | |
112 | ||
113 | /* verify PDU length */ | |
114 | datalen = ntoh24(hdr->dlength); | |
200ae1a0 OG |
115 | if (datalen > rx_data_len || (datalen + 4) < rx_data_len) { |
116 | iser_err("wrong datalen %d (hdr), %d (IB)\n", | |
117 | datalen, rx_data_len); | |
65e7ae7b OG |
118 | rc = ISCSI_ERR_DATALEN; |
119 | goto error; | |
120 | } | |
121 | ||
200ae1a0 OG |
122 | if (datalen != rx_data_len) |
123 | iser_dbg("aligned datalen (%d) hdr, %d (IB)\n", | |
124 | datalen, rx_data_len); | |
125 | ||
65e7ae7b OG |
126 | /* read AHS */ |
127 | ahslen = hdr->hlength * 4; | |
128 | ||
0af967f5 | 129 | rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len); |
65e7ae7b OG |
130 | if (rc && rc != ISCSI_ERR_NO_SCSI_CMD) |
131 | goto error; | |
132 | ||
133 | return; | |
134 | error: | |
135 | iscsi_conn_failure(conn, rc); | |
136 | } | |
137 | ||
2ff79d52 | 138 | static int iscsi_iser_pdu_alloc(struct iscsi_task *task, uint8_t opcode) |
0f9c7449 MC |
139 | { |
140 | struct iscsi_iser_task *iser_task = task->dd_data; | |
141 | ||
142 | task->hdr = (struct iscsi_hdr *)&iser_task->desc.iscsi_header; | |
143 | task->hdr_max = sizeof(iser_task->desc.iscsi_header); | |
144 | return 0; | |
145 | } | |
65e7ae7b | 146 | |
f19624aa OG |
147 | int iser_initialize_task_headers(struct iscsi_task *task, |
148 | struct iser_tx_desc *tx_desc) | |
149 | { | |
5716af6e | 150 | struct iser_conn *iser_conn = task->conn->dd_data; |
a4ee3539 | 151 | struct iser_device *device = iser_conn->ib_conn.device; |
f19624aa OG |
152 | struct iscsi_iser_task *iser_task = task->dd_data; |
153 | u64 dma_addr; | |
154 | ||
155 | dma_addr = ib_dma_map_single(device->ib_device, (void *)tx_desc, | |
156 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
157 | if (ib_dma_mapping_error(device->ib_device, dma_addr)) | |
158 | return -ENOMEM; | |
159 | ||
160 | tx_desc->dma_addr = dma_addr; | |
161 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
162 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
163 | tx_desc->tx_sg[0].lkey = device->mr->lkey; | |
164 | ||
5716af6e | 165 | iser_task->iser_conn = iser_conn; |
f19624aa OG |
166 | return 0; |
167 | } | |
65e7ae7b | 168 | /** |
2261ec3d MC |
169 | * iscsi_iser_task_init - Initialize task |
170 | * @task: iscsi task | |
65e7ae7b | 171 | * |
2261ec3d | 172 | * Initialize the task for the scsi command or mgmt command. |
2747fdb2 | 173 | */ |
a8ac6311 | 174 | static int |
2261ec3d | 175 | iscsi_iser_task_init(struct iscsi_task *task) |
65e7ae7b | 176 | { |
2261ec3d | 177 | struct iscsi_iser_task *iser_task = task->dd_data; |
65e7ae7b | 178 | |
52439540 | 179 | if (iser_initialize_task_headers(task, &iser_task->desc)) |
f19624aa OG |
180 | return -ENOMEM; |
181 | ||
2261ec3d | 182 | /* mgmt task */ |
f19624aa | 183 | if (!task->sc) |
2747fdb2 | 184 | return 0; |
65e7ae7b | 185 | |
2261ec3d | 186 | iser_task->command_sent = 0; |
2261ec3d | 187 | iser_task_rdma_init(iser_task); |
177e31bd SG |
188 | iser_task->sc = task->sc; |
189 | ||
a8ac6311 | 190 | return 0; |
65e7ae7b OG |
191 | } |
192 | ||
193 | /** | |
2261ec3d | 194 | * iscsi_iser_mtask_xmit - xmit management(immediate) task |
65e7ae7b | 195 | * @conn: iscsi connection |
2261ec3d | 196 | * @task: task management task |
65e7ae7b OG |
197 | * |
198 | * Notes: | |
199 | * The function can return -EAGAIN in which case caller must | |
200 | * call it again later, or recover. '0' return code means successful | |
201 | * xmit. | |
202 | * | |
203 | **/ | |
204 | static int | |
2261ec3d | 205 | iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) |
65e7ae7b OG |
206 | { |
207 | int error = 0; | |
208 | ||
962b4b52 | 209 | iser_dbg("mtask xmit [cid %d itt 0x%x]\n", conn->id, task->itt); |
65e7ae7b | 210 | |
2261ec3d | 211 | error = iser_send_control(conn, task); |
65e7ae7b | 212 | |
2261ec3d | 213 | /* since iser xmits control with zero copy, tasks can not be recycled |
65e7ae7b OG |
214 | * right after sending them. |
215 | * The recycling scheme is based on whether a response is expected | |
2261ec3d MC |
216 | * - if yes, the task is recycled at iscsi_complete_pdu |
217 | * - if no, the task is recycled at iser_snd_completion | |
65e7ae7b | 218 | */ |
65e7ae7b OG |
219 | return error; |
220 | } | |
221 | ||
222 | static int | |
2747fdb2 | 223 | iscsi_iser_task_xmit_unsol_data(struct iscsi_conn *conn, |
2261ec3d | 224 | struct iscsi_task *task) |
65e7ae7b | 225 | { |
0f9c7449 MC |
226 | struct iscsi_r2t_info *r2t = &task->unsol_r2t; |
227 | struct iscsi_data hdr; | |
65e7ae7b | 228 | int error = 0; |
65e7ae7b OG |
229 | |
230 | /* Send data-out PDUs while there's still unsolicited data to send */ | |
0f9c7449 MC |
231 | while (iscsi_task_has_unsol_data(task)) { |
232 | iscsi_prep_data_out_pdu(task, r2t, &hdr); | |
48a237a2 | 233 | iser_dbg("Sending data-out: itt 0x%x, data count %d\n", |
0f9c7449 | 234 | hdr.itt, r2t->data_count); |
65e7ae7b OG |
235 | |
236 | /* the buffer description has been passed with the command */ | |
237 | /* Send the command */ | |
2261ec3d | 238 | error = iser_send_data_out(conn, task, &hdr); |
65e7ae7b | 239 | if (error) { |
0f9c7449 | 240 | r2t->datasn--; |
2747fdb2 | 241 | goto iscsi_iser_task_xmit_unsol_data_exit; |
65e7ae7b | 242 | } |
0f9c7449 | 243 | r2t->sent += r2t->data_count; |
48a237a2 | 244 | iser_dbg("Need to send %d more as data-out PDUs\n", |
0f9c7449 | 245 | r2t->data_length - r2t->sent); |
65e7ae7b OG |
246 | } |
247 | ||
2747fdb2 | 248 | iscsi_iser_task_xmit_unsol_data_exit: |
65e7ae7b OG |
249 | return error; |
250 | } | |
251 | ||
252 | static int | |
2261ec3d | 253 | iscsi_iser_task_xmit(struct iscsi_task *task) |
65e7ae7b | 254 | { |
2261ec3d MC |
255 | struct iscsi_conn *conn = task->conn; |
256 | struct iscsi_iser_task *iser_task = task->dd_data; | |
65e7ae7b OG |
257 | int error = 0; |
258 | ||
2261ec3d MC |
259 | if (!task->sc) |
260 | return iscsi_iser_mtask_xmit(conn, task); | |
2747fdb2 | 261 | |
2261ec3d MC |
262 | if (task->sc->sc_data_direction == DMA_TO_DEVICE) { |
263 | BUG_ON(scsi_bufflen(task->sc) == 0); | |
77a23c21 | 264 | |
48a237a2 | 265 | iser_dbg("cmd [itt %x total %d imm %d unsol_data %d\n", |
2261ec3d | 266 | task->itt, scsi_bufflen(task->sc), |
0f9c7449 | 267 | task->imm_count, task->unsol_r2t.data_length); |
77a23c21 MC |
268 | } |
269 | ||
962b4b52 | 270 | iser_dbg("ctask xmit [cid %d itt 0x%x]\n", |
2261ec3d | 271 | conn->id, task->itt); |
65e7ae7b | 272 | |
65e7ae7b | 273 | /* Send the cmd PDU */ |
2261ec3d MC |
274 | if (!iser_task->command_sent) { |
275 | error = iser_send_command(conn, task); | |
65e7ae7b | 276 | if (error) |
2747fdb2 | 277 | goto iscsi_iser_task_xmit_exit; |
2261ec3d | 278 | iser_task->command_sent = 1; |
65e7ae7b OG |
279 | } |
280 | ||
281 | /* Send unsolicited data-out PDU(s) if necessary */ | |
0f9c7449 | 282 | if (iscsi_task_has_unsol_data(task)) |
2261ec3d | 283 | error = iscsi_iser_task_xmit_unsol_data(conn, task); |
65e7ae7b | 284 | |
2747fdb2 | 285 | iscsi_iser_task_xmit_exit: |
65e7ae7b OG |
286 | return error; |
287 | } | |
288 | ||
0f9c7449 | 289 | static void iscsi_iser_cleanup_task(struct iscsi_task *task) |
65e7ae7b | 290 | { |
2261ec3d | 291 | struct iscsi_iser_task *iser_task = task->dd_data; |
4667f5df | 292 | struct iser_tx_desc *tx_desc = &iser_task->desc; |
5716af6e | 293 | struct iser_conn *iser_conn = task->conn->dd_data; |
a4ee3539 | 294 | struct iser_device *device = iser_conn->ib_conn.device; |
52439540 | 295 | |
3a940daf SG |
296 | /* DEVICE_REMOVAL event might have already released the device */ |
297 | if (!device) | |
298 | return; | |
299 | ||
52439540 OG |
300 | ib_dma_unmap_single(device->ib_device, |
301 | tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
65e7ae7b | 302 | |
b3cd5050 MC |
303 | /* mgmt tasks do not need special cleanup */ |
304 | if (!task->sc) | |
2747fdb2 | 305 | return; |
65e7ae7b | 306 | |
2261ec3d MC |
307 | if (iser_task->status == ISER_TASK_STATUS_STARTED) { |
308 | iser_task->status = ISER_TASK_STATUS_COMPLETED; | |
309 | iser_task_rdma_finalize(iser_task); | |
65e7ae7b | 310 | } |
65e7ae7b OG |
311 | } |
312 | ||
0a7a08ad SG |
313 | static u8 iscsi_iser_check_protection(struct iscsi_task *task, sector_t *sector) |
314 | { | |
315 | struct iscsi_iser_task *iser_task = task->dd_data; | |
316 | ||
317 | if (iser_task->dir[ISER_DIR_IN]) | |
318 | return iser_check_task_pi_status(iser_task, ISER_DIR_IN, | |
319 | sector); | |
320 | else | |
321 | return iser_check_task_pi_status(iser_task, ISER_DIR_OUT, | |
322 | sector); | |
323 | } | |
324 | ||
65e7ae7b OG |
325 | static struct iscsi_cls_conn * |
326 | iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) | |
327 | { | |
328 | struct iscsi_conn *conn; | |
329 | struct iscsi_cls_conn *cls_conn; | |
65e7ae7b | 330 | |
4667f5df | 331 | cls_conn = iscsi_conn_setup(cls_session, 0, conn_idx); |
65e7ae7b OG |
332 | if (!cls_conn) |
333 | return NULL; | |
334 | conn = cls_conn->dd_data; | |
335 | ||
336 | /* | |
337 | * due to issues with the login code re iser sematics | |
338 | * this not set in iscsi_conn_setup - FIXME | |
339 | */ | |
bcc60c38 | 340 | conn->max_recv_dlength = ISER_RECV_DATA_SEG_LEN; |
65e7ae7b | 341 | |
65e7ae7b | 342 | return cls_conn; |
65e7ae7b OG |
343 | } |
344 | ||
65e7ae7b OG |
345 | static int |
346 | iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, | |
347 | struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, | |
348 | int is_leading) | |
349 | { | |
350 | struct iscsi_conn *conn = cls_conn->dd_data; | |
5716af6e | 351 | struct iser_conn *iser_conn; |
412eeafa | 352 | struct iscsi_endpoint *ep; |
65e7ae7b OG |
353 | int error; |
354 | ||
355 | error = iscsi_conn_bind(cls_session, cls_conn, is_leading); | |
356 | if (error) | |
357 | return error; | |
358 | ||
359 | /* the transport ep handle comes from user space so it must be | |
360 | * verified against the global ib connections list */ | |
412eeafa MC |
361 | ep = iscsi_lookup_endpoint(transport_eph); |
362 | if (!ep) { | |
65e7ae7b OG |
363 | iser_err("can't bind eph %llx\n", |
364 | (unsigned long long)transport_eph); | |
365 | return -EINVAL; | |
366 | } | |
5716af6e | 367 | iser_conn = ep->dd_data; |
412eeafa | 368 | |
5716af6e SG |
369 | mutex_lock(&iser_conn->state_mutex); |
370 | if (iser_conn->state != ISER_CONN_UP) { | |
91eb1df3 SG |
371 | error = -EINVAL; |
372 | iser_err("iser_conn %p state is %d, teardown started\n", | |
5716af6e | 373 | iser_conn, iser_conn->state); |
91eb1df3 SG |
374 | goto out; |
375 | } | |
376 | ||
5716af6e | 377 | error = iser_alloc_rx_descriptors(iser_conn, conn->session); |
91eb1df3 SG |
378 | if (error) |
379 | goto out; | |
89e984e2 | 380 | |
65e7ae7b OG |
381 | /* binds the iSER connection retrieved from the previously |
382 | * connected ep_handle to the iSCSI layer connection. exchanges | |
383 | * connection pointers */ | |
5716af6e | 384 | iser_info("binding iscsi conn %p to iser_conn %p\n", conn, iser_conn); |
4667f5df | 385 | |
5716af6e SG |
386 | conn->dd_data = iser_conn; |
387 | iser_conn->iscsi_conn = conn; | |
4667f5df | 388 | |
91eb1df3 | 389 | out: |
5716af6e | 390 | mutex_unlock(&iser_conn->state_mutex); |
91eb1df3 | 391 | return error; |
65e7ae7b | 392 | } |
65e7ae7b | 393 | |
b73c3ada AN |
394 | static int |
395 | iscsi_iser_conn_start(struct iscsi_cls_conn *cls_conn) | |
396 | { | |
397 | struct iscsi_conn *iscsi_conn; | |
5716af6e | 398 | struct iser_conn *iser_conn; |
b73c3ada AN |
399 | |
400 | iscsi_conn = cls_conn->dd_data; | |
5716af6e SG |
401 | iser_conn = iscsi_conn->dd_data; |
402 | reinit_completion(&iser_conn->stop_completion); | |
b73c3ada AN |
403 | |
404 | return iscsi_conn_start(cls_conn); | |
405 | } | |
406 | ||
b40977d9 MC |
407 | static void |
408 | iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) | |
409 | { | |
410 | struct iscsi_conn *conn = cls_conn->dd_data; | |
5716af6e | 411 | struct iser_conn *iser_conn = conn->dd_data; |
65e7ae7b | 412 | |
bba0a3c9 | 413 | iser_info("stopping iscsi_conn: %p, iser_conn: %p\n", conn, iser_conn); |
b73c3ada | 414 | |
b40977d9 | 415 | /* |
913e5bf4 MC |
416 | * Userspace may have goofed up and not bound the connection or |
417 | * might have only partially setup the connection. | |
b40977d9 | 418 | */ |
5716af6e | 419 | if (iser_conn) { |
ec370e2b | 420 | mutex_lock(&iser_conn->state_mutex); |
3a940daf | 421 | iscsi_conn_stop(cls_conn, flag); |
ec370e2b AN |
422 | iser_conn_terminate(iser_conn); |
423 | ||
424 | /* unbind */ | |
425 | iser_conn->iscsi_conn = NULL; | |
b73c3ada | 426 | conn->dd_data = NULL; |
ec370e2b | 427 | |
5716af6e | 428 | complete(&iser_conn->stop_completion); |
ec370e2b | 429 | mutex_unlock(&iser_conn->state_mutex); |
3a940daf SG |
430 | } else { |
431 | iscsi_conn_stop(cls_conn, flag); | |
913e5bf4 | 432 | } |
65e7ae7b OG |
433 | } |
434 | ||
75613521 MC |
435 | static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session) |
436 | { | |
437 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); | |
438 | ||
e5bd7b54 | 439 | iscsi_session_teardown(cls_session); |
a4804cd6 MC |
440 | iscsi_host_remove(shost); |
441 | iscsi_host_free(shost); | |
75613521 | 442 | } |
65e7ae7b | 443 | |
6192d4e6 SG |
444 | static inline unsigned int |
445 | iser_dif_prot_caps(int prot_caps) | |
446 | { | |
447 | return ((prot_caps & IB_PROT_T10DIF_TYPE_1) ? SHOST_DIF_TYPE1_PROTECTION | | |
448 | SHOST_DIX_TYPE1_PROTECTION : 0) | | |
449 | ((prot_caps & IB_PROT_T10DIF_TYPE_2) ? SHOST_DIF_TYPE2_PROTECTION | | |
450 | SHOST_DIX_TYPE2_PROTECTION : 0) | | |
451 | ((prot_caps & IB_PROT_T10DIF_TYPE_3) ? SHOST_DIF_TYPE3_PROTECTION | | |
452 | SHOST_DIX_TYPE3_PROTECTION : 0); | |
453 | } | |
454 | ||
65e7ae7b | 455 | static struct iscsi_cls_session * |
412eeafa | 456 | iscsi_iser_session_create(struct iscsi_endpoint *ep, |
75613521 | 457 | uint16_t cmds_max, uint16_t qdepth, |
5e7facb7 | 458 | uint32_t initial_cmdsn) |
65e7ae7b OG |
459 | { |
460 | struct iscsi_cls_session *cls_session; | |
461 | struct iscsi_session *session; | |
412eeafa | 462 | struct Scsi_Host *shost; |
5716af6e | 463 | struct iser_conn *iser_conn = NULL; |
a4ee3539 | 464 | struct ib_conn *ib_conn; |
75613521 | 465 | |
962b4b52 | 466 | shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 0); |
75613521 MC |
467 | if (!shost) |
468 | return NULL; | |
469 | shost->transportt = iscsi_iser_scsi_transport; | |
b7f04513 | 470 | shost->cmd_per_lun = qdepth; |
75613521 MC |
471 | shost->max_lun = iscsi_max_lun; |
472 | shost->max_id = 0; | |
473 | shost->max_channel = 0; | |
474 | shost->max_cmd_len = 16; | |
475 | ||
412eeafa MC |
476 | /* |
477 | * older userspace tools (before 2.0-870) did not pass us | |
478 | * the leading conn's ep so this will be NULL; | |
479 | */ | |
6192d4e6 | 480 | if (ep) { |
5716af6e | 481 | iser_conn = ep->dd_data; |
a4ee3539 SG |
482 | ib_conn = &iser_conn->ib_conn; |
483 | if (ib_conn->pi_support) { | |
484 | u32 sig_caps = ib_conn->device->dev_attr.sig_prot_cap; | |
6192d4e6 SG |
485 | |
486 | scsi_host_set_prot(shost, iser_dif_prot_caps(sig_caps)); | |
487 | if (iser_pi_guard) | |
488 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
489 | else | |
490 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC); | |
491 | } | |
492 | } | |
412eeafa | 493 | |
5716af6e | 494 | if (iscsi_host_add(shost, ep ? |
a4ee3539 | 495 | ib_conn->device->ib_device->dma_device : NULL)) |
75613521 | 496 | goto free_host; |
65e7ae7b | 497 | |
b7f04513 SP |
498 | if (cmds_max > ISER_DEF_XMIT_CMDS_MAX) { |
499 | iser_info("cmds_max changed from %u to %u\n", | |
500 | cmds_max, ISER_DEF_XMIT_CMDS_MAX); | |
501 | cmds_max = ISER_DEF_XMIT_CMDS_MAX; | |
502 | } | |
503 | ||
75613521 | 504 | cls_session = iscsi_session_setup(&iscsi_iser_transport, shost, |
b7f04513 | 505 | cmds_max, 0, |
2261ec3d | 506 | sizeof(struct iscsi_iser_task), |
7970634b | 507 | initial_cmdsn, 0); |
65e7ae7b | 508 | if (!cls_session) |
75613521 MC |
509 | goto remove_host; |
510 | session = cls_session->dd_data; | |
65e7ae7b | 511 | |
2747fdb2 | 512 | shost->can_queue = session->scsi_cmds_max; |
65e7ae7b | 513 | return cls_session; |
75613521 MC |
514 | |
515 | remove_host: | |
a4804cd6 | 516 | iscsi_host_remove(shost); |
75613521 | 517 | free_host: |
a4804cd6 | 518 | iscsi_host_free(shost); |
75613521 | 519 | return NULL; |
65e7ae7b OG |
520 | } |
521 | ||
522 | static int | |
358ff019 MC |
523 | iscsi_iser_set_param(struct iscsi_cls_conn *cls_conn, |
524 | enum iscsi_param param, char *buf, int buflen) | |
65e7ae7b | 525 | { |
358ff019 | 526 | int value; |
65e7ae7b OG |
527 | |
528 | switch (param) { | |
529 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
530 | /* TBD */ | |
531 | break; | |
65e7ae7b | 532 | case ISCSI_PARAM_HDRDGST_EN: |
358ff019 | 533 | sscanf(buf, "%d", &value); |
65e7ae7b | 534 | if (value) { |
e7eeffa4 | 535 | iser_err("DataDigest wasn't negotiated to None\n"); |
65e7ae7b OG |
536 | return -EPROTO; |
537 | } | |
538 | break; | |
539 | case ISCSI_PARAM_DATADGST_EN: | |
358ff019 | 540 | sscanf(buf, "%d", &value); |
65e7ae7b | 541 | if (value) { |
e7eeffa4 | 542 | iser_err("DataDigest wasn't negotiated to None\n"); |
65e7ae7b OG |
543 | return -EPROTO; |
544 | } | |
545 | break; | |
65e7ae7b | 546 | case ISCSI_PARAM_IFMARKER_EN: |
358ff019 | 547 | sscanf(buf, "%d", &value); |
65e7ae7b | 548 | if (value) { |
e7eeffa4 | 549 | iser_err("IFMarker wasn't negotiated to No\n"); |
65e7ae7b OG |
550 | return -EPROTO; |
551 | } | |
552 | break; | |
553 | case ISCSI_PARAM_OFMARKER_EN: | |
358ff019 | 554 | sscanf(buf, "%d", &value); |
65e7ae7b | 555 | if (value) { |
e7eeffa4 | 556 | iser_err("OFMarker wasn't negotiated to No\n"); |
65e7ae7b OG |
557 | return -EPROTO; |
558 | } | |
559 | break; | |
560 | default: | |
358ff019 | 561 | return iscsi_set_param(cls_conn, param, buf, buflen); |
65e7ae7b OG |
562 | } |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
65e7ae7b OG |
567 | static void |
568 | iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) | |
569 | { | |
570 | struct iscsi_conn *conn = cls_conn->dd_data; | |
571 | ||
572 | stats->txdata_octets = conn->txdata_octets; | |
573 | stats->rxdata_octets = conn->rxdata_octets; | |
574 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
575 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
576 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
577 | stats->datain_pdus = conn->datain_pdus_cnt; /* always 0 */ | |
578 | stats->r2t_pdus = conn->r2t_pdus_cnt; /* always 0 */ | |
579 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
580 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
87528227 | 581 | stats->custom_length = 4; |
65e7ae7b OG |
582 | strcpy(stats->custom[0].desc, "qp_tx_queue_full"); |
583 | stats->custom[0].value = 0; /* TB iser_conn->qp_tx_queue_full; */ | |
584 | strcpy(stats->custom[1].desc, "fmr_map_not_avail"); | |
585 | stats->custom[1].value = 0; /* TB iser_conn->fmr_map_not_avail */; | |
586 | strcpy(stats->custom[2].desc, "eh_abort_cnt"); | |
587 | stats->custom[2].value = conn->eh_abort_cnt; | |
87528227 ED |
588 | strcpy(stats->custom[3].desc, "fmr_unalign_cnt"); |
589 | stats->custom[3].value = conn->fmr_unalign_cnt; | |
65e7ae7b OG |
590 | } |
591 | ||
7c53c6f8 MC |
592 | static int iscsi_iser_get_ep_param(struct iscsi_endpoint *ep, |
593 | enum iscsi_param param, char *buf) | |
594 | { | |
5716af6e | 595 | struct iser_conn *iser_conn = ep->dd_data; |
7c53c6f8 MC |
596 | int len; |
597 | ||
598 | switch (param) { | |
599 | case ISCSI_PARAM_CONN_PORT: | |
600 | case ISCSI_PARAM_CONN_ADDRESS: | |
a4ee3539 | 601 | if (!iser_conn || !iser_conn->ib_conn.cma_id) |
7c53c6f8 MC |
602 | return -ENOTCONN; |
603 | ||
604 | return iscsi_conn_get_addr_param((struct sockaddr_storage *) | |
a4ee3539 SG |
605 | &iser_conn->ib_conn.cma_id->route.addr.dst_addr, |
606 | param, buf); | |
7c53c6f8 MC |
607 | break; |
608 | default: | |
609 | return -ENOSYS; | |
610 | } | |
611 | ||
612 | return len; | |
613 | } | |
614 | ||
412eeafa | 615 | static struct iscsi_endpoint * |
10eb0f01 MC |
616 | iscsi_iser_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, |
617 | int non_blocking) | |
65e7ae7b OG |
618 | { |
619 | int err; | |
5716af6e | 620 | struct iser_conn *iser_conn; |
412eeafa | 621 | struct iscsi_endpoint *ep; |
65e7ae7b | 622 | |
0a690758 | 623 | ep = iscsi_create_endpoint(0); |
412eeafa MC |
624 | if (!ep) |
625 | return ERR_PTR(-ENOMEM); | |
65e7ae7b | 626 | |
5716af6e SG |
627 | iser_conn = kzalloc(sizeof(*iser_conn), GFP_KERNEL); |
628 | if (!iser_conn) { | |
0a690758 AN |
629 | err = -ENOMEM; |
630 | goto failure; | |
631 | } | |
632 | ||
5716af6e SG |
633 | ep->dd_data = iser_conn; |
634 | iser_conn->ep = ep; | |
635 | iser_conn_init(iser_conn); | |
65e7ae7b | 636 | |
5716af6e | 637 | err = iser_connect(iser_conn, NULL, dst_addr, non_blocking); |
7d9c0de4 | 638 | if (err) |
0a690758 | 639 | goto failure; |
7d9c0de4 | 640 | |
412eeafa | 641 | return ep; |
0a690758 AN |
642 | failure: |
643 | iscsi_destroy_endpoint(ep); | |
644 | return ERR_PTR(err); | |
65e7ae7b OG |
645 | } |
646 | ||
647 | static int | |
412eeafa | 648 | iscsi_iser_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) |
65e7ae7b | 649 | { |
5716af6e | 650 | struct iser_conn *iser_conn; |
65e7ae7b OG |
651 | int rc; |
652 | ||
5716af6e SG |
653 | iser_conn = ep->dd_data; |
654 | rc = wait_for_completion_interruptible_timeout(&iser_conn->up_completion, | |
9a6d3234 | 655 | msecs_to_jiffies(timeout_ms)); |
65e7ae7b | 656 | /* if conn establishment failed, return error code to iscsi */ |
504130c0 | 657 | if (rc == 0) { |
5716af6e SG |
658 | mutex_lock(&iser_conn->state_mutex); |
659 | if (iser_conn->state == ISER_CONN_TERMINATING || | |
660 | iser_conn->state == ISER_CONN_DOWN) | |
504130c0 | 661 | rc = -1; |
5716af6e | 662 | mutex_unlock(&iser_conn->state_mutex); |
504130c0 | 663 | } |
65e7ae7b | 664 | |
5716af6e | 665 | iser_info("ib conn %p rc = %d\n", iser_conn, rc); |
65e7ae7b OG |
666 | |
667 | if (rc > 0) | |
668 | return 1; /* success, this is the equivalent of POLLOUT */ | |
669 | else if (!rc) | |
670 | return 0; /* timeout */ | |
671 | else | |
672 | return rc; /* signal */ | |
673 | } | |
674 | ||
675 | static void | |
412eeafa | 676 | iscsi_iser_ep_disconnect(struct iscsi_endpoint *ep) |
65e7ae7b | 677 | { |
5716af6e | 678 | struct iser_conn *iser_conn; |
65e7ae7b | 679 | |
5716af6e SG |
680 | iser_conn = ep->dd_data; |
681 | iser_info("ep %p iser conn %p state %d\n", | |
682 | ep, iser_conn, iser_conn->state); | |
683 | ||
684 | mutex_lock(&iser_conn->state_mutex); | |
685 | iser_conn_terminate(iser_conn); | |
b73c3ada AN |
686 | |
687 | /* | |
9a6d3234 AN |
688 | * if iser_conn and iscsi_conn are bound, we must wait for |
689 | * iscsi_conn_stop and flush errors completion before freeing | |
690 | * the iser resources. Otherwise we are safe to free resources | |
691 | * immediately. | |
b73c3ada | 692 | */ |
5716af6e SG |
693 | if (iser_conn->iscsi_conn) { |
694 | INIT_WORK(&iser_conn->release_work, iser_release_work); | |
695 | queue_work(release_wq, &iser_conn->release_work); | |
696 | mutex_unlock(&iser_conn->state_mutex); | |
b73c3ada | 697 | } else { |
5716af6e SG |
698 | iser_conn->state = ISER_CONN_DOWN; |
699 | mutex_unlock(&iser_conn->state_mutex); | |
700 | iser_conn_release(iser_conn); | |
b73c3ada | 701 | } |
0a690758 | 702 | iscsi_destroy_endpoint(ep); |
65e7ae7b OG |
703 | } |
704 | ||
587a1f16 | 705 | static umode_t iser_attr_is_visible(int param_type, int param) |
3128c6c7 MC |
706 | { |
707 | switch (param_type) { | |
f27fb2ef MC |
708 | case ISCSI_HOST_PARAM: |
709 | switch (param) { | |
710 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
711 | case ISCSI_HOST_PARAM_HWADDRESS: | |
712 | case ISCSI_HOST_PARAM_INITIATOR_NAME: | |
713 | return S_IRUGO; | |
714 | default: | |
715 | return 0; | |
716 | } | |
3128c6c7 MC |
717 | case ISCSI_PARAM: |
718 | switch (param) { | |
719 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
720 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
721 | case ISCSI_PARAM_HDRDGST_EN: | |
722 | case ISCSI_PARAM_DATADGST_EN: | |
723 | case ISCSI_PARAM_CONN_ADDRESS: | |
724 | case ISCSI_PARAM_CONN_PORT: | |
725 | case ISCSI_PARAM_EXP_STATSN: | |
726 | case ISCSI_PARAM_PERSISTENT_ADDRESS: | |
727 | case ISCSI_PARAM_PERSISTENT_PORT: | |
728 | case ISCSI_PARAM_PING_TMO: | |
729 | case ISCSI_PARAM_RECV_TMO: | |
1d063c17 MC |
730 | case ISCSI_PARAM_INITIAL_R2T_EN: |
731 | case ISCSI_PARAM_MAX_R2T: | |
732 | case ISCSI_PARAM_IMM_DATA_EN: | |
733 | case ISCSI_PARAM_FIRST_BURST: | |
734 | case ISCSI_PARAM_MAX_BURST: | |
735 | case ISCSI_PARAM_PDU_INORDER_EN: | |
736 | case ISCSI_PARAM_DATASEQ_INORDER_EN: | |
737 | case ISCSI_PARAM_TARGET_NAME: | |
738 | case ISCSI_PARAM_TPGT: | |
739 | case ISCSI_PARAM_USERNAME: | |
740 | case ISCSI_PARAM_PASSWORD: | |
741 | case ISCSI_PARAM_USERNAME_IN: | |
742 | case ISCSI_PARAM_PASSWORD_IN: | |
743 | case ISCSI_PARAM_FAST_ABORT: | |
744 | case ISCSI_PARAM_ABORT_TMO: | |
745 | case ISCSI_PARAM_LU_RESET_TMO: | |
746 | case ISCSI_PARAM_TGT_RESET_TMO: | |
747 | case ISCSI_PARAM_IFACE_NAME: | |
748 | case ISCSI_PARAM_INITIATOR_NAME: | |
6a06a4b8 | 749 | case ISCSI_PARAM_DISCOVERY_SESS: |
3128c6c7 MC |
750 | return S_IRUGO; |
751 | default: | |
752 | return 0; | |
753 | } | |
754 | } | |
755 | ||
756 | return 0; | |
757 | } | |
758 | ||
65e7ae7b | 759 | static struct scsi_host_template iscsi_iser_sht = { |
7974392c | 760 | .module = THIS_MODULE, |
c1d786e6 | 761 | .name = "iSCSI Initiator over iSER", |
65e7ae7b | 762 | .queuecommand = iscsi_queuecommand, |
6410627e | 763 | .change_queue_depth = iscsi_change_queue_depth, |
65e7ae7b | 764 | .sg_tablesize = ISCSI_ISER_SG_TABLESIZE, |
8072ec2f | 765 | .max_sectors = 1024, |
e28f3d5b | 766 | .cmd_per_lun = ISER_DEF_CMD_PER_LUN, |
65e7ae7b | 767 | .eh_abort_handler = iscsi_eh_abort, |
90c18f3c | 768 | .eh_device_reset_handler= iscsi_eh_device_reset, |
309ce156 | 769 | .eh_target_reset_handler = iscsi_eh_recover_target, |
6b5d6c44 | 770 | .target_alloc = iscsi_target_alloc, |
65e7ae7b OG |
771 | .use_clustering = DISABLE_CLUSTERING, |
772 | .proc_name = "iscsi_iser", | |
773 | .this_id = -1, | |
774 | }; | |
775 | ||
776 | static struct iscsi_transport iscsi_iser_transport = { | |
777 | .owner = THIS_MODULE, | |
778 | .name = "iser", | |
6a06a4b8 | 779 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_TEXT_NEGO, |
65e7ae7b OG |
780 | /* session management */ |
781 | .create_session = iscsi_iser_session_create, | |
75613521 | 782 | .destroy_session = iscsi_iser_session_destroy, |
65e7ae7b OG |
783 | /* connection management */ |
784 | .create_conn = iscsi_iser_conn_create, | |
785 | .bind_conn = iscsi_iser_conn_bind, | |
b73c3ada | 786 | .destroy_conn = iscsi_conn_teardown, |
3128c6c7 | 787 | .attr_is_visible = iser_attr_is_visible, |
358ff019 MC |
788 | .set_param = iscsi_iser_set_param, |
789 | .get_conn_param = iscsi_conn_get_param, | |
7c53c6f8 | 790 | .get_ep_param = iscsi_iser_get_ep_param, |
358ff019 | 791 | .get_session_param = iscsi_session_get_param, |
b73c3ada | 792 | .start_conn = iscsi_iser_conn_start, |
b40977d9 | 793 | .stop_conn = iscsi_iser_conn_stop, |
0801c242 MC |
794 | /* iscsi host params */ |
795 | .get_host_param = iscsi_host_get_param, | |
796 | .set_host_param = iscsi_host_set_param, | |
65e7ae7b OG |
797 | /* IO */ |
798 | .send_pdu = iscsi_conn_send_pdu, | |
799 | .get_stats = iscsi_iser_conn_get_stats, | |
2747fdb2 MC |
800 | .init_task = iscsi_iser_task_init, |
801 | .xmit_task = iscsi_iser_task_xmit, | |
802 | .cleanup_task = iscsi_iser_cleanup_task, | |
0f9c7449 | 803 | .alloc_pdu = iscsi_iser_pdu_alloc, |
0a7a08ad | 804 | .check_protection = iscsi_iser_check_protection, |
65e7ae7b OG |
805 | /* recovery */ |
806 | .session_recovery_timedout = iscsi_session_recovery_timedout, | |
807 | ||
808 | .ep_connect = iscsi_iser_ep_connect, | |
809 | .ep_poll = iscsi_iser_ep_poll, | |
810 | .ep_disconnect = iscsi_iser_ep_disconnect | |
811 | }; | |
812 | ||
813 | static int __init iser_init(void) | |
814 | { | |
815 | int err; | |
816 | ||
817 | iser_dbg("Starting iSER datamover...\n"); | |
818 | ||
819 | if (iscsi_max_lun < 1) { | |
4f363882 | 820 | iser_err("Invalid max_lun value of %u\n", iscsi_max_lun); |
65e7ae7b OG |
821 | return -EINVAL; |
822 | } | |
823 | ||
65e7ae7b OG |
824 | memset(&ig, 0, sizeof(struct iser_global)); |
825 | ||
826 | ig.desc_cache = kmem_cache_create("iser_descriptors", | |
f19624aa | 827 | sizeof(struct iser_tx_desc), |
65e7ae7b | 828 | 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 829 | NULL); |
65e7ae7b OG |
830 | if (ig.desc_cache == NULL) |
831 | return -ENOMEM; | |
832 | ||
833 | /* device init is called only after the first addr resolution */ | |
834 | mutex_init(&ig.device_list_mutex); | |
835 | INIT_LIST_HEAD(&ig.device_list); | |
836 | mutex_init(&ig.connlist_mutex); | |
837 | INIT_LIST_HEAD(&ig.connlist); | |
838 | ||
b73c3ada AN |
839 | release_wq = alloc_workqueue("release workqueue", 0, 0); |
840 | if (!release_wq) { | |
841 | iser_err("failed to allocate release workqueue\n"); | |
842 | return -ENOMEM; | |
843 | } | |
844 | ||
75613521 MC |
845 | iscsi_iser_scsi_transport = iscsi_register_transport( |
846 | &iscsi_iser_transport); | |
847 | if (!iscsi_iser_scsi_transport) { | |
65e7ae7b OG |
848 | iser_err("iscsi_register_transport failed\n"); |
849 | err = -EINVAL; | |
850 | goto register_transport_failure; | |
851 | } | |
852 | ||
853 | return 0; | |
854 | ||
855 | register_transport_failure: | |
856 | kmem_cache_destroy(ig.desc_cache); | |
857 | ||
858 | return err; | |
859 | } | |
860 | ||
861 | static void __exit iser_exit(void) | |
862 | { | |
5716af6e | 863 | struct iser_conn *iser_conn, *n; |
b73c3ada AN |
864 | int connlist_empty; |
865 | ||
65e7ae7b | 866 | iser_dbg("Removing iSER datamover...\n"); |
b73c3ada AN |
867 | destroy_workqueue(release_wq); |
868 | ||
869 | mutex_lock(&ig.connlist_mutex); | |
870 | connlist_empty = list_empty(&ig.connlist); | |
871 | mutex_unlock(&ig.connlist_mutex); | |
872 | ||
873 | if (!connlist_empty) { | |
874 | iser_err("Error cleanup stage completed but we still have iser " | |
875 | "connections, destroying them anyway.\n"); | |
5716af6e SG |
876 | list_for_each_entry_safe(iser_conn, n, &ig.connlist, |
877 | conn_list) { | |
878 | iser_conn_release(iser_conn); | |
b73c3ada AN |
879 | } |
880 | } | |
881 | ||
65e7ae7b OG |
882 | iscsi_unregister_transport(&iscsi_iser_transport); |
883 | kmem_cache_destroy(ig.desc_cache); | |
884 | } | |
885 | ||
886 | module_init(iser_init); | |
887 | module_exit(iser_exit); |