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cf4e6363 MC |
1 | /* |
2 | * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver. | |
3 | * | |
ea9582d7 | 4 | * Copyright (c) 2006 - 2011 Broadcom Corporation |
cf4e6363 MC |
5 | * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. |
6 | * Copyright (c) 2007, 2008 Mike Christie | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation. | |
11 | * | |
12 | * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) | |
11cec1e2 | 13 | * Maintained by: Eddie Wai (eddie.wai@broadcom.com) |
cf4e6363 MC |
14 | */ |
15 | ||
5a0e3ad6 | 16 | #include <linux/slab.h> |
cf4e6363 MC |
17 | #include <scsi/scsi_tcq.h> |
18 | #include <scsi/libiscsi.h> | |
19 | #include "bnx2i.h" | |
20 | ||
21 | struct scsi_transport_template *bnx2i_scsi_xport_template; | |
22 | struct iscsi_transport bnx2i_iscsi_transport; | |
23 | static struct scsi_host_template bnx2i_host_template; | |
24 | ||
25 | /* | |
26 | * Global endpoint resource info | |
27 | */ | |
28 | static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */ | |
29 | ||
b5cf6b63 | 30 | DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); |
cf4e6363 MC |
31 | |
32 | static int bnx2i_adapter_ready(struct bnx2i_hba *hba) | |
33 | { | |
34 | int retval = 0; | |
35 | ||
36 | if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || | |
37 | test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || | |
38 | test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) | |
39 | retval = -EPERM; | |
40 | return retval; | |
41 | } | |
42 | ||
43 | /** | |
44 | * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks | |
45 | * @cmd: iscsi cmd struct pointer | |
46 | * @buf_off: absolute buffer offset | |
47 | * @start_bd_off: u32 pointer to return the offset within the BD | |
48 | * indicated by 'start_bd_idx' on which 'buf_off' falls | |
49 | * @start_bd_idx: index of the BD on which 'buf_off' falls | |
50 | * | |
51 | * identifies & marks various bd info for scsi command's imm data, | |
52 | * unsolicited data and the first solicited data seq. | |
53 | */ | |
54 | static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off, | |
55 | u32 *start_bd_off, u32 *start_bd_idx) | |
56 | { | |
57 | struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl; | |
58 | u32 cur_offset = 0; | |
59 | u32 cur_bd_idx = 0; | |
60 | ||
61 | if (buf_off) { | |
62 | while (buf_off >= (cur_offset + bd_tbl->buffer_length)) { | |
63 | cur_offset += bd_tbl->buffer_length; | |
64 | cur_bd_idx++; | |
65 | bd_tbl++; | |
66 | } | |
67 | } | |
68 | ||
69 | *start_bd_off = buf_off - cur_offset; | |
70 | *start_bd_idx = cur_bd_idx; | |
71 | } | |
72 | ||
73 | /** | |
74 | * bnx2i_setup_write_cmd_bd_info - sets up BD various information | |
75 | * @task: transport layer's cmd struct pointer | |
76 | * | |
77 | * identifies & marks various bd info for scsi command's immediate data, | |
78 | * unsolicited data and first solicited data seq which includes BD start | |
79 | * index & BD buf off. his function takes into account iscsi parameter such | |
80 | * as immediate data and unsolicited data is support on this connection. | |
81 | */ | |
82 | static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task) | |
83 | { | |
84 | struct bnx2i_cmd *cmd = task->dd_data; | |
85 | u32 start_bd_offset; | |
86 | u32 start_bd_idx; | |
87 | u32 buffer_offset = 0; | |
88 | u32 cmd_len = cmd->req.total_data_transfer_length; | |
89 | ||
90 | /* if ImmediateData is turned off & IntialR2T is turned on, | |
91 | * there will be no immediate or unsolicited data, just return. | |
92 | */ | |
93 | if (!iscsi_task_has_unsol_data(task) && !task->imm_count) | |
94 | return; | |
95 | ||
96 | /* Immediate data */ | |
97 | buffer_offset += task->imm_count; | |
98 | if (task->imm_count == cmd_len) | |
99 | return; | |
100 | ||
101 | if (iscsi_task_has_unsol_data(task)) { | |
102 | bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, | |
103 | &start_bd_offset, &start_bd_idx); | |
104 | cmd->req.ud_buffer_offset = start_bd_offset; | |
105 | cmd->req.ud_start_bd_index = start_bd_idx; | |
106 | buffer_offset += task->unsol_r2t.data_length; | |
107 | } | |
108 | ||
109 | if (buffer_offset != cmd_len) { | |
110 | bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, | |
111 | &start_bd_offset, &start_bd_idx); | |
112 | if ((start_bd_offset > task->conn->session->first_burst) || | |
113 | (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) { | |
114 | int i = 0; | |
115 | ||
116 | iscsi_conn_printk(KERN_ALERT, task->conn, | |
117 | "bnx2i- error, buf offset 0x%x " | |
118 | "bd_valid %d use_sg %d\n", | |
119 | buffer_offset, cmd->io_tbl.bd_valid, | |
120 | scsi_sg_count(cmd->scsi_cmd)); | |
121 | for (i = 0; i < cmd->io_tbl.bd_valid; i++) | |
122 | iscsi_conn_printk(KERN_ALERT, task->conn, | |
123 | "bnx2i err, bd[%d]: len %x\n", | |
124 | i, cmd->io_tbl.bd_tbl[i].\ | |
125 | buffer_length); | |
126 | } | |
127 | cmd->req.sd_buffer_offset = start_bd_offset; | |
128 | cmd->req.sd_start_bd_index = start_bd_idx; | |
129 | } | |
130 | } | |
131 | ||
132 | ||
133 | ||
134 | /** | |
135 | * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table | |
136 | * @hba: adapter instance | |
137 | * @cmd: iscsi cmd struct pointer | |
138 | * | |
139 | * map SG list | |
140 | */ | |
141 | static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) | |
142 | { | |
143 | struct scsi_cmnd *sc = cmd->scsi_cmd; | |
144 | struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; | |
145 | struct scatterlist *sg; | |
146 | int byte_count = 0; | |
147 | int bd_count = 0; | |
148 | int sg_count; | |
149 | int sg_len; | |
150 | u64 addr; | |
151 | int i; | |
152 | ||
153 | BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD); | |
154 | ||
155 | sg_count = scsi_dma_map(sc); | |
156 | ||
157 | scsi_for_each_sg(sc, sg, sg_count, i) { | |
158 | sg_len = sg_dma_len(sg); | |
159 | addr = (u64) sg_dma_address(sg); | |
160 | bd[bd_count].buffer_addr_lo = addr & 0xffffffff; | |
161 | bd[bd_count].buffer_addr_hi = addr >> 32; | |
162 | bd[bd_count].buffer_length = sg_len; | |
163 | bd[bd_count].flags = 0; | |
164 | if (bd_count == 0) | |
165 | bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN; | |
166 | ||
167 | byte_count += sg_len; | |
168 | bd_count++; | |
169 | } | |
170 | ||
171 | if (bd_count) | |
172 | bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN; | |
173 | ||
174 | BUG_ON(byte_count != scsi_bufflen(sc)); | |
175 | return bd_count; | |
176 | } | |
177 | ||
178 | /** | |
179 | * bnx2i_iscsi_map_sg_list - maps SG list | |
180 | * @cmd: iscsi cmd struct pointer | |
181 | * | |
182 | * creates BD list table for the command | |
183 | */ | |
184 | static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd) | |
185 | { | |
186 | int bd_count; | |
187 | ||
188 | bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd); | |
189 | if (!bd_count) { | |
190 | struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; | |
191 | ||
192 | bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0; | |
193 | bd[0].buffer_length = bd[0].flags = 0; | |
194 | } | |
195 | cmd->io_tbl.bd_valid = bd_count; | |
196 | } | |
197 | ||
198 | ||
199 | /** | |
200 | * bnx2i_iscsi_unmap_sg_list - unmaps SG list | |
201 | * @cmd: iscsi cmd struct pointer | |
202 | * | |
203 | * unmap IO buffers and invalidate the BD table | |
204 | */ | |
205 | void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd) | |
206 | { | |
207 | struct scsi_cmnd *sc = cmd->scsi_cmd; | |
208 | ||
209 | if (cmd->io_tbl.bd_valid && sc) { | |
210 | scsi_dma_unmap(sc); | |
211 | cmd->io_tbl.bd_valid = 0; | |
212 | } | |
213 | } | |
214 | ||
215 | static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd) | |
216 | { | |
217 | memset(&cmd->req, 0x00, sizeof(cmd->req)); | |
218 | cmd->req.op_code = 0xFF; | |
219 | cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma; | |
220 | cmd->req.bd_list_addr_hi = | |
221 | (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32); | |
222 | ||
223 | } | |
224 | ||
225 | ||
226 | /** | |
227 | * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid' | |
228 | * @hba: pointer to adapter instance | |
229 | * @conn: pointer to iscsi connection | |
230 | * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) | |
231 | * | |
232 | * update iscsi cid table entry with connection pointer. This enables | |
233 | * driver to quickly get hold of connection structure pointer in | |
234 | * completion/interrupt thread using iscsi context ID | |
235 | */ | |
236 | static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba, | |
237 | struct bnx2i_conn *bnx2i_conn, | |
238 | u32 iscsi_cid) | |
239 | { | |
240 | if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) { | |
241 | iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, | |
242 | "conn bind - entry #%d not free\n", iscsi_cid); | |
243 | return -EBUSY; | |
244 | } | |
245 | ||
246 | hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn; | |
247 | return 0; | |
248 | } | |
249 | ||
250 | ||
251 | /** | |
252 | * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr | |
253 | * @hba: pointer to adapter instance | |
254 | * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) | |
255 | */ | |
256 | struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, | |
257 | u16 iscsi_cid) | |
258 | { | |
259 | if (!hba->cid_que.conn_cid_tbl) { | |
260 | printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n"); | |
261 | return NULL; | |
262 | ||
263 | } else if (iscsi_cid >= hba->max_active_conns) { | |
264 | printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid); | |
265 | return NULL; | |
266 | } | |
267 | return hba->cid_que.conn_cid_tbl[iscsi_cid]; | |
268 | } | |
269 | ||
270 | ||
271 | /** | |
272 | * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool | |
273 | * @hba: pointer to adapter instance | |
274 | */ | |
275 | static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba) | |
276 | { | |
277 | int idx; | |
278 | ||
279 | if (!hba->cid_que.cid_free_cnt) | |
280 | return -1; | |
281 | ||
282 | idx = hba->cid_que.cid_q_cons_idx; | |
283 | hba->cid_que.cid_q_cons_idx++; | |
284 | if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx) | |
285 | hba->cid_que.cid_q_cons_idx = 0; | |
286 | ||
287 | hba->cid_que.cid_free_cnt--; | |
288 | return hba->cid_que.cid_que[idx]; | |
289 | } | |
290 | ||
291 | ||
292 | /** | |
293 | * bnx2i_free_iscsi_cid - returns tcp port to free list | |
294 | * @hba: pointer to adapter instance | |
295 | * @iscsi_cid: iscsi context ID to free | |
296 | */ | |
297 | static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid) | |
298 | { | |
299 | int idx; | |
300 | ||
301 | if (iscsi_cid == (u16) -1) | |
302 | return; | |
303 | ||
304 | hba->cid_que.cid_free_cnt++; | |
305 | ||
306 | idx = hba->cid_que.cid_q_prod_idx; | |
307 | hba->cid_que.cid_que[idx] = iscsi_cid; | |
308 | hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL; | |
309 | hba->cid_que.cid_q_prod_idx++; | |
310 | if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx) | |
311 | hba->cid_que.cid_q_prod_idx = 0; | |
312 | } | |
313 | ||
314 | ||
315 | /** | |
316 | * bnx2i_setup_free_cid_que - sets up free iscsi cid queue | |
317 | * @hba: pointer to adapter instance | |
318 | * | |
319 | * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table, | |
320 | * and initialize table attributes | |
321 | */ | |
322 | static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba) | |
323 | { | |
324 | int mem_size; | |
325 | int i; | |
326 | ||
327 | mem_size = hba->max_active_conns * sizeof(u32); | |
328 | mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; | |
329 | ||
330 | hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL); | |
331 | if (!hba->cid_que.cid_que_base) | |
332 | return -ENOMEM; | |
333 | ||
334 | mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *); | |
335 | mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; | |
336 | hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL); | |
337 | if (!hba->cid_que.conn_cid_tbl) { | |
338 | kfree(hba->cid_que.cid_que_base); | |
339 | hba->cid_que.cid_que_base = NULL; | |
340 | return -ENOMEM; | |
341 | } | |
342 | ||
343 | hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base; | |
344 | hba->cid_que.cid_q_prod_idx = 0; | |
345 | hba->cid_que.cid_q_cons_idx = 0; | |
346 | hba->cid_que.cid_q_max_idx = hba->max_active_conns; | |
347 | hba->cid_que.cid_free_cnt = hba->max_active_conns; | |
348 | ||
349 | for (i = 0; i < hba->max_active_conns; i++) { | |
350 | hba->cid_que.cid_que[i] = i; | |
351 | hba->cid_que.conn_cid_tbl[i] = NULL; | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
356 | ||
357 | /** | |
358 | * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources | |
359 | * @hba: pointer to adapter instance | |
360 | */ | |
361 | static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba) | |
362 | { | |
363 | kfree(hba->cid_que.cid_que_base); | |
364 | hba->cid_que.cid_que_base = NULL; | |
365 | ||
366 | kfree(hba->cid_que.conn_cid_tbl); | |
367 | hba->cid_que.conn_cid_tbl = NULL; | |
368 | } | |
369 | ||
370 | ||
371 | /** | |
372 | * bnx2i_alloc_ep - allocates ep structure from global pool | |
373 | * @hba: pointer to adapter instance | |
374 | * | |
375 | * routine allocates a free endpoint structure from global pool and | |
376 | * a tcp port to be used for this connection. Global resource lock, | |
377 | * 'bnx2i_resc_lock' is held while accessing shared global data structures | |
378 | */ | |
379 | static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba) | |
380 | { | |
381 | struct iscsi_endpoint *ep; | |
382 | struct bnx2i_endpoint *bnx2i_ep; | |
9ae58e14 | 383 | u32 ec_div; |
cf4e6363 MC |
384 | |
385 | ep = iscsi_create_endpoint(sizeof(*bnx2i_ep)); | |
386 | if (!ep) { | |
387 | printk(KERN_ERR "bnx2i: Could not allocate ep\n"); | |
388 | return NULL; | |
389 | } | |
390 | ||
391 | bnx2i_ep = ep->dd_data; | |
46012e8b | 392 | bnx2i_ep->cls_ep = ep; |
cf4e6363 MC |
393 | INIT_LIST_HEAD(&bnx2i_ep->link); |
394 | bnx2i_ep->state = EP_STATE_IDLE; | |
c19dcd01 | 395 | bnx2i_ep->ep_iscsi_cid = (u16) -1; |
cf4e6363 MC |
396 | bnx2i_ep->hba = hba; |
397 | bnx2i_ep->hba_age = hba->age; | |
9ae58e14 EW |
398 | |
399 | ec_div = event_coal_div; | |
400 | while (ec_div >>= 1) | |
401 | bnx2i_ep->ec_shift += 1; | |
402 | ||
cf4e6363 MC |
403 | hba->ofld_conns_active++; |
404 | init_waitqueue_head(&bnx2i_ep->ofld_wait); | |
405 | return ep; | |
406 | } | |
407 | ||
408 | ||
409 | /** | |
410 | * bnx2i_free_ep - free endpoint | |
411 | * @ep: pointer to iscsi endpoint structure | |
412 | */ | |
413 | static void bnx2i_free_ep(struct iscsi_endpoint *ep) | |
414 | { | |
415 | struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; | |
416 | unsigned long flags; | |
417 | ||
418 | spin_lock_irqsave(&bnx2i_resc_lock, flags); | |
419 | bnx2i_ep->state = EP_STATE_IDLE; | |
420 | bnx2i_ep->hba->ofld_conns_active--; | |
421 | ||
a91031a6 EW |
422 | if (bnx2i_ep->ep_iscsi_cid != (u16) -1) |
423 | bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid); | |
424 | ||
cf4e6363 MC |
425 | if (bnx2i_ep->conn) { |
426 | bnx2i_ep->conn->ep = NULL; | |
427 | bnx2i_ep->conn = NULL; | |
428 | } | |
429 | ||
430 | bnx2i_ep->hba = NULL; | |
431 | spin_unlock_irqrestore(&bnx2i_resc_lock, flags); | |
432 | iscsi_destroy_endpoint(ep); | |
433 | } | |
434 | ||
435 | ||
436 | /** | |
437 | * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command | |
438 | * @hba: adapter instance pointer | |
439 | * @session: iscsi session pointer | |
440 | * @cmd: iscsi command structure | |
441 | */ | |
442 | static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session, | |
443 | struct bnx2i_cmd *cmd) | |
444 | { | |
445 | struct io_bdt *io = &cmd->io_tbl; | |
446 | struct iscsi_bd *bd; | |
447 | ||
448 | io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, | |
449 | ISCSI_MAX_BDS_PER_CMD * sizeof(*bd), | |
450 | &io->bd_tbl_dma, GFP_KERNEL); | |
451 | if (!io->bd_tbl) { | |
452 | iscsi_session_printk(KERN_ERR, session, "Could not " | |
453 | "allocate bdt.\n"); | |
454 | return -ENOMEM; | |
455 | } | |
456 | io->bd_valid = 0; | |
457 | return 0; | |
458 | } | |
459 | ||
460 | /** | |
461 | * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table | |
462 | * @hba: adapter instance pointer | |
463 | * @session: iscsi session pointer | |
464 | * @cmd: iscsi command structure | |
465 | */ | |
466 | static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba, | |
467 | struct iscsi_session *session) | |
468 | { | |
469 | int i; | |
470 | ||
471 | for (i = 0; i < session->cmds_max; i++) { | |
472 | struct iscsi_task *task = session->cmds[i]; | |
473 | struct bnx2i_cmd *cmd = task->dd_data; | |
474 | ||
475 | if (cmd->io_tbl.bd_tbl) | |
476 | dma_free_coherent(&hba->pcidev->dev, | |
477 | ISCSI_MAX_BDS_PER_CMD * | |
478 | sizeof(struct iscsi_bd), | |
479 | cmd->io_tbl.bd_tbl, | |
480 | cmd->io_tbl.bd_tbl_dma); | |
481 | } | |
482 | ||
483 | } | |
484 | ||
485 | ||
486 | /** | |
487 | * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session | |
488 | * @hba: adapter instance pointer | |
489 | * @session: iscsi session pointer | |
490 | */ | |
491 | static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba, | |
492 | struct iscsi_session *session) | |
493 | { | |
494 | int i; | |
495 | ||
496 | for (i = 0; i < session->cmds_max; i++) { | |
497 | struct iscsi_task *task = session->cmds[i]; | |
498 | struct bnx2i_cmd *cmd = task->dd_data; | |
499 | ||
cf4e6363 MC |
500 | task->hdr = &cmd->hdr; |
501 | task->hdr_max = sizeof(struct iscsi_hdr); | |
502 | ||
503 | if (bnx2i_alloc_bdt(hba, session, cmd)) | |
504 | goto free_bdts; | |
505 | } | |
506 | ||
507 | return 0; | |
508 | ||
509 | free_bdts: | |
510 | bnx2i_destroy_cmd_pool(hba, session); | |
511 | return -ENOMEM; | |
512 | } | |
513 | ||
514 | ||
515 | /** | |
516 | * bnx2i_setup_mp_bdt - allocate BD table resources | |
517 | * @hba: pointer to adapter structure | |
518 | * | |
519 | * Allocate memory for dummy buffer and associated BD | |
520 | * table to be used by middle path (MP) requests | |
521 | */ | |
522 | static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba) | |
523 | { | |
524 | int rc = 0; | |
525 | struct iscsi_bd *mp_bdt; | |
526 | u64 addr; | |
527 | ||
528 | hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
529 | &hba->mp_bd_dma, GFP_KERNEL); | |
530 | if (!hba->mp_bd_tbl) { | |
531 | printk(KERN_ERR "unable to allocate Middle Path BDT\n"); | |
532 | rc = -1; | |
533 | goto out; | |
534 | } | |
535 | ||
536 | hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
537 | &hba->dummy_buf_dma, GFP_KERNEL); | |
538 | if (!hba->dummy_buffer) { | |
539 | printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n"); | |
540 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
541 | hba->mp_bd_tbl, hba->mp_bd_dma); | |
542 | hba->mp_bd_tbl = NULL; | |
543 | rc = -1; | |
544 | goto out; | |
545 | } | |
546 | ||
547 | mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl; | |
548 | addr = (unsigned long) hba->dummy_buf_dma; | |
549 | mp_bdt->buffer_addr_lo = addr & 0xffffffff; | |
550 | mp_bdt->buffer_addr_hi = addr >> 32; | |
551 | mp_bdt->buffer_length = PAGE_SIZE; | |
552 | mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN | | |
553 | ISCSI_BD_FIRST_IN_BD_CHAIN; | |
554 | out: | |
555 | return rc; | |
556 | } | |
557 | ||
558 | ||
559 | /** | |
560 | * bnx2i_free_mp_bdt - releases ITT back to free pool | |
561 | * @hba: pointer to adapter instance | |
562 | * | |
563 | * free MP dummy buffer and associated BD table | |
564 | */ | |
565 | static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba) | |
566 | { | |
567 | if (hba->mp_bd_tbl) { | |
568 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
569 | hba->mp_bd_tbl, hba->mp_bd_dma); | |
570 | hba->mp_bd_tbl = NULL; | |
571 | } | |
572 | if (hba->dummy_buffer) { | |
573 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
574 | hba->dummy_buffer, hba->dummy_buf_dma); | |
575 | hba->dummy_buffer = NULL; | |
576 | } | |
577 | return; | |
578 | } | |
579 | ||
580 | /** | |
581 | * bnx2i_drop_session - notifies iscsid of connection error. | |
582 | * @hba: adapter instance pointer | |
583 | * @session: iscsi session pointer | |
584 | * | |
585 | * This notifies iscsid that there is a error, so it can initiate | |
586 | * recovery. | |
587 | * | |
588 | * This relies on caller using the iscsi class iterator so the object | |
589 | * is refcounted and does not disapper from under us. | |
590 | */ | |
591 | void bnx2i_drop_session(struct iscsi_cls_session *cls_session) | |
592 | { | |
593 | iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); | |
594 | } | |
595 | ||
596 | /** | |
597 | * bnx2i_ep_destroy_list_add - add an entry to EP destroy list | |
598 | * @hba: pointer to adapter instance | |
599 | * @ep: pointer to endpoint (transport indentifier) structure | |
600 | * | |
601 | * EP destroy queue manager | |
602 | */ | |
603 | static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba, | |
604 | struct bnx2i_endpoint *ep) | |
605 | { | |
606 | write_lock_bh(&hba->ep_rdwr_lock); | |
607 | list_add_tail(&ep->link, &hba->ep_destroy_list); | |
608 | write_unlock_bh(&hba->ep_rdwr_lock); | |
609 | return 0; | |
610 | } | |
611 | ||
612 | /** | |
613 | * bnx2i_ep_destroy_list_del - add an entry to EP destroy list | |
614 | * | |
615 | * @hba: pointer to adapter instance | |
616 | * @ep: pointer to endpoint (transport indentifier) structure | |
617 | * | |
618 | * EP destroy queue manager | |
619 | */ | |
620 | static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba, | |
621 | struct bnx2i_endpoint *ep) | |
622 | { | |
623 | write_lock_bh(&hba->ep_rdwr_lock); | |
624 | list_del_init(&ep->link); | |
625 | write_unlock_bh(&hba->ep_rdwr_lock); | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
630 | /** | |
631 | * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list | |
632 | * @hba: pointer to adapter instance | |
633 | * @ep: pointer to endpoint (transport indentifier) structure | |
634 | * | |
635 | * pending conn offload completion queue manager | |
636 | */ | |
637 | static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba, | |
638 | struct bnx2i_endpoint *ep) | |
639 | { | |
640 | write_lock_bh(&hba->ep_rdwr_lock); | |
641 | list_add_tail(&ep->link, &hba->ep_ofld_list); | |
642 | write_unlock_bh(&hba->ep_rdwr_lock); | |
643 | return 0; | |
644 | } | |
645 | ||
646 | /** | |
647 | * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list | |
648 | * @hba: pointer to adapter instance | |
649 | * @ep: pointer to endpoint (transport indentifier) structure | |
650 | * | |
651 | * pending conn offload completion queue manager | |
652 | */ | |
653 | static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba, | |
654 | struct bnx2i_endpoint *ep) | |
655 | { | |
656 | write_lock_bh(&hba->ep_rdwr_lock); | |
657 | list_del_init(&ep->link); | |
658 | write_unlock_bh(&hba->ep_rdwr_lock); | |
659 | return 0; | |
660 | } | |
661 | ||
662 | ||
663 | /** | |
664 | * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints | |
665 | * | |
666 | * @hba: pointer to adapter instance | |
667 | * @iscsi_cid: iscsi context ID to find | |
668 | * | |
669 | */ | |
670 | struct bnx2i_endpoint * | |
671 | bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid) | |
672 | { | |
673 | struct list_head *list; | |
674 | struct list_head *tmp; | |
675 | struct bnx2i_endpoint *ep; | |
676 | ||
677 | read_lock_bh(&hba->ep_rdwr_lock); | |
678 | list_for_each_safe(list, tmp, &hba->ep_ofld_list) { | |
679 | ep = (struct bnx2i_endpoint *)list; | |
680 | ||
681 | if (ep->ep_iscsi_cid == iscsi_cid) | |
682 | break; | |
683 | ep = NULL; | |
684 | } | |
685 | read_unlock_bh(&hba->ep_rdwr_lock); | |
686 | ||
687 | if (!ep) | |
688 | printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); | |
689 | return ep; | |
690 | } | |
691 | ||
cf4e6363 MC |
692 | /** |
693 | * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list | |
694 | * @hba: pointer to adapter instance | |
695 | * @iscsi_cid: iscsi context ID to find | |
696 | * | |
697 | */ | |
698 | struct bnx2i_endpoint * | |
699 | bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid) | |
700 | { | |
701 | struct list_head *list; | |
702 | struct list_head *tmp; | |
703 | struct bnx2i_endpoint *ep; | |
704 | ||
705 | read_lock_bh(&hba->ep_rdwr_lock); | |
706 | list_for_each_safe(list, tmp, &hba->ep_destroy_list) { | |
707 | ep = (struct bnx2i_endpoint *)list; | |
708 | ||
709 | if (ep->ep_iscsi_cid == iscsi_cid) | |
710 | break; | |
711 | ep = NULL; | |
712 | } | |
713 | read_unlock_bh(&hba->ep_rdwr_lock); | |
714 | ||
715 | if (!ep) | |
716 | printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); | |
717 | ||
718 | return ep; | |
719 | } | |
720 | ||
46012e8b EW |
721 | /** |
722 | * bnx2i_ep_active_list_add - add an entry to ep active list | |
723 | * @hba: pointer to adapter instance | |
724 | * @ep: pointer to endpoint (transport indentifier) structure | |
725 | * | |
726 | * current active conn queue manager | |
727 | */ | |
728 | static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba, | |
729 | struct bnx2i_endpoint *ep) | |
730 | { | |
731 | write_lock_bh(&hba->ep_rdwr_lock); | |
732 | list_add_tail(&ep->link, &hba->ep_active_list); | |
733 | write_unlock_bh(&hba->ep_rdwr_lock); | |
734 | } | |
735 | ||
736 | ||
737 | /** | |
738 | * bnx2i_ep_active_list_del - deletes an entry to ep active list | |
739 | * @hba: pointer to adapter instance | |
740 | * @ep: pointer to endpoint (transport indentifier) structure | |
741 | * | |
742 | * current active conn queue manager | |
743 | */ | |
744 | static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba, | |
745 | struct bnx2i_endpoint *ep) | |
746 | { | |
747 | write_lock_bh(&hba->ep_rdwr_lock); | |
748 | list_del_init(&ep->link); | |
749 | write_unlock_bh(&hba->ep_rdwr_lock); | |
750 | } | |
751 | ||
752 | ||
cf4e6363 MC |
753 | /** |
754 | * bnx2i_setup_host_queue_size - assigns shost->can_queue param | |
755 | * @hba: pointer to adapter instance | |
756 | * @shost: scsi host pointer | |
757 | * | |
758 | * Initializes 'can_queue' parameter based on how many outstanding commands | |
759 | * the device can handle. Each device 5708/5709/57710 has different | |
760 | * capabilities | |
761 | */ | |
762 | static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba, | |
763 | struct Scsi_Host *shost) | |
764 | { | |
765 | if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type)) | |
766 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; | |
767 | else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) | |
768 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709; | |
769 | else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) | |
770 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710; | |
771 | else | |
772 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; | |
773 | } | |
774 | ||
775 | ||
776 | /** | |
777 | * bnx2i_alloc_hba - allocate and init adapter instance | |
778 | * @cnic: cnic device pointer | |
779 | * | |
780 | * allocate & initialize adapter structure and call other | |
781 | * support routines to do per adapter initialization | |
782 | */ | |
783 | struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic) | |
784 | { | |
785 | struct Scsi_Host *shost; | |
786 | struct bnx2i_hba *hba; | |
787 | ||
788 | shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0); | |
789 | if (!shost) | |
790 | return NULL; | |
791 | shost->dma_boundary = cnic->pcidev->dma_mask; | |
792 | shost->transportt = bnx2i_scsi_xport_template; | |
793 | shost->max_id = ISCSI_MAX_CONNS_PER_HBA; | |
794 | shost->max_channel = 0; | |
795 | shost->max_lun = 512; | |
796 | shost->max_cmd_len = 16; | |
797 | ||
798 | hba = iscsi_host_priv(shost); | |
799 | hba->shost = shost; | |
800 | hba->netdev = cnic->netdev; | |
801 | /* Get PCI related information and update hba struct members */ | |
802 | hba->pcidev = cnic->pcidev; | |
803 | pci_dev_get(hba->pcidev); | |
804 | hba->pci_did = hba->pcidev->device; | |
805 | hba->pci_vid = hba->pcidev->vendor; | |
806 | hba->pci_sdid = hba->pcidev->subsystem_device; | |
807 | hba->pci_svid = hba->pcidev->subsystem_vendor; | |
808 | hba->pci_func = PCI_FUNC(hba->pcidev->devfn); | |
809 | hba->pci_devno = PCI_SLOT(hba->pcidev->devfn); | |
cf4e6363 MC |
810 | |
811 | bnx2i_identify_device(hba); | |
812 | bnx2i_setup_host_queue_size(hba, shost); | |
813 | ||
814 | if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { | |
815 | hba->regview = ioremap_nocache(hba->netdev->base_addr, | |
816 | BNX2_MQ_CONFIG2); | |
817 | if (!hba->regview) | |
818 | goto ioreg_map_err; | |
819 | } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { | |
820 | hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096); | |
821 | if (!hba->regview) | |
822 | goto ioreg_map_err; | |
823 | } | |
824 | ||
825 | if (bnx2i_setup_mp_bdt(hba)) | |
826 | goto mp_bdt_mem_err; | |
827 | ||
828 | INIT_LIST_HEAD(&hba->ep_ofld_list); | |
46012e8b | 829 | INIT_LIST_HEAD(&hba->ep_active_list); |
cf4e6363 MC |
830 | INIT_LIST_HEAD(&hba->ep_destroy_list); |
831 | rwlock_init(&hba->ep_rdwr_lock); | |
832 | ||
833 | hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED; | |
834 | ||
835 | /* different values for 5708/5709/57710 */ | |
836 | hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA; | |
837 | ||
838 | if (bnx2i_setup_free_cid_que(hba)) | |
839 | goto cid_que_err; | |
840 | ||
841 | /* SQ/RQ/CQ size can be changed via sysfx interface */ | |
842 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { | |
843 | if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX) | |
844 | hba->max_sqes = sq_size; | |
845 | else | |
846 | hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT; | |
847 | } else { /* 5706/5708/5709 */ | |
848 | if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX) | |
849 | hba->max_sqes = sq_size; | |
850 | else | |
851 | hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT; | |
852 | } | |
853 | ||
854 | hba->max_rqes = rq_size; | |
855 | hba->max_cqes = hba->max_sqes + rq_size; | |
856 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { | |
857 | if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX) | |
858 | hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX; | |
859 | } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX) | |
860 | hba->max_cqes = BNX2I_570X_CQ_WQES_MAX; | |
861 | ||
862 | hba->num_ccell = hba->max_sqes / 2; | |
863 | ||
864 | spin_lock_init(&hba->lock); | |
865 | mutex_init(&hba->net_dev_lock); | |
490475a9 | 866 | init_waitqueue_head(&hba->eh_wait); |
e37d2c47 | 867 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
d5307a07 | 868 | hba->hba_shutdown_tmo = 30 * HZ; |
e37d2c47 EW |
869 | hba->conn_teardown_tmo = 20 * HZ; |
870 | hba->conn_ctx_destroy_tmo = 6 * HZ; | |
871 | } else { /* 5706/5708/5709 */ | |
55e15c97 | 872 | hba->hba_shutdown_tmo = 20 * HZ; |
e37d2c47 EW |
873 | hba->conn_teardown_tmo = 10 * HZ; |
874 | hba->conn_ctx_destroy_tmo = 2 * HZ; | |
875 | } | |
cf4e6363 MC |
876 | |
877 | if (iscsi_host_add(shost, &hba->pcidev->dev)) | |
878 | goto free_dump_mem; | |
879 | return hba; | |
880 | ||
881 | free_dump_mem: | |
882 | bnx2i_release_free_cid_que(hba); | |
883 | cid_que_err: | |
884 | bnx2i_free_mp_bdt(hba); | |
885 | mp_bdt_mem_err: | |
886 | if (hba->regview) { | |
887 | iounmap(hba->regview); | |
888 | hba->regview = NULL; | |
889 | } | |
890 | ioreg_map_err: | |
891 | pci_dev_put(hba->pcidev); | |
892 | scsi_host_put(shost); | |
893 | return NULL; | |
894 | } | |
895 | ||
896 | /** | |
897 | * bnx2i_free_hba- releases hba structure and resources held by the adapter | |
898 | * @hba: pointer to adapter instance | |
899 | * | |
900 | * free adapter structure and call various cleanup routines. | |
901 | */ | |
902 | void bnx2i_free_hba(struct bnx2i_hba *hba) | |
903 | { | |
904 | struct Scsi_Host *shost = hba->shost; | |
905 | ||
906 | iscsi_host_remove(shost); | |
907 | INIT_LIST_HEAD(&hba->ep_ofld_list); | |
46012e8b | 908 | INIT_LIST_HEAD(&hba->ep_active_list); |
cf4e6363 MC |
909 | INIT_LIST_HEAD(&hba->ep_destroy_list); |
910 | pci_dev_put(hba->pcidev); | |
911 | ||
912 | if (hba->regview) { | |
913 | iounmap(hba->regview); | |
914 | hba->regview = NULL; | |
915 | } | |
916 | bnx2i_free_mp_bdt(hba); | |
917 | bnx2i_release_free_cid_que(hba); | |
918 | iscsi_host_free(shost); | |
919 | } | |
920 | ||
921 | /** | |
922 | * bnx2i_conn_free_login_resources - free DMA resources used for login process | |
923 | * @hba: pointer to adapter instance | |
924 | * @bnx2i_conn: iscsi connection pointer | |
925 | * | |
926 | * Login related resources, mostly BDT & payload DMA memory is freed | |
927 | */ | |
928 | static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba, | |
929 | struct bnx2i_conn *bnx2i_conn) | |
930 | { | |
931 | if (bnx2i_conn->gen_pdu.resp_bd_tbl) { | |
932 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
933 | bnx2i_conn->gen_pdu.resp_bd_tbl, | |
934 | bnx2i_conn->gen_pdu.resp_bd_dma); | |
935 | bnx2i_conn->gen_pdu.resp_bd_tbl = NULL; | |
936 | } | |
937 | ||
938 | if (bnx2i_conn->gen_pdu.req_bd_tbl) { | |
939 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
940 | bnx2i_conn->gen_pdu.req_bd_tbl, | |
941 | bnx2i_conn->gen_pdu.req_bd_dma); | |
942 | bnx2i_conn->gen_pdu.req_bd_tbl = NULL; | |
943 | } | |
944 | ||
945 | if (bnx2i_conn->gen_pdu.resp_buf) { | |
946 | dma_free_coherent(&hba->pcidev->dev, | |
947 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
948 | bnx2i_conn->gen_pdu.resp_buf, | |
949 | bnx2i_conn->gen_pdu.resp_dma_addr); | |
950 | bnx2i_conn->gen_pdu.resp_buf = NULL; | |
951 | } | |
952 | ||
953 | if (bnx2i_conn->gen_pdu.req_buf) { | |
954 | dma_free_coherent(&hba->pcidev->dev, | |
955 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
956 | bnx2i_conn->gen_pdu.req_buf, | |
957 | bnx2i_conn->gen_pdu.req_dma_addr); | |
958 | bnx2i_conn->gen_pdu.req_buf = NULL; | |
959 | } | |
960 | } | |
961 | ||
962 | /** | |
963 | * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop. | |
964 | * @hba: pointer to adapter instance | |
965 | * @bnx2i_conn: iscsi connection pointer | |
966 | * | |
967 | * Mgmt task DNA resources are allocated in this routine. | |
968 | */ | |
969 | static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba, | |
970 | struct bnx2i_conn *bnx2i_conn) | |
971 | { | |
972 | /* Allocate memory for login request/response buffers */ | |
973 | bnx2i_conn->gen_pdu.req_buf = | |
974 | dma_alloc_coherent(&hba->pcidev->dev, | |
975 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
976 | &bnx2i_conn->gen_pdu.req_dma_addr, | |
977 | GFP_KERNEL); | |
978 | if (bnx2i_conn->gen_pdu.req_buf == NULL) | |
979 | goto login_req_buf_failure; | |
980 | ||
981 | bnx2i_conn->gen_pdu.req_buf_size = 0; | |
982 | bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf; | |
983 | ||
984 | bnx2i_conn->gen_pdu.resp_buf = | |
985 | dma_alloc_coherent(&hba->pcidev->dev, | |
986 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
987 | &bnx2i_conn->gen_pdu.resp_dma_addr, | |
988 | GFP_KERNEL); | |
989 | if (bnx2i_conn->gen_pdu.resp_buf == NULL) | |
990 | goto login_resp_buf_failure; | |
991 | ||
992 | bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; | |
993 | bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf; | |
994 | ||
995 | bnx2i_conn->gen_pdu.req_bd_tbl = | |
996 | dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
997 | &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL); | |
998 | if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL) | |
999 | goto login_req_bd_tbl_failure; | |
1000 | ||
1001 | bnx2i_conn->gen_pdu.resp_bd_tbl = | |
1002 | dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
1003 | &bnx2i_conn->gen_pdu.resp_bd_dma, | |
1004 | GFP_KERNEL); | |
1005 | if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL) | |
1006 | goto login_resp_bd_tbl_failure; | |
1007 | ||
1008 | return 0; | |
1009 | ||
1010 | login_resp_bd_tbl_failure: | |
1011 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, | |
1012 | bnx2i_conn->gen_pdu.req_bd_tbl, | |
1013 | bnx2i_conn->gen_pdu.req_bd_dma); | |
1014 | bnx2i_conn->gen_pdu.req_bd_tbl = NULL; | |
1015 | ||
1016 | login_req_bd_tbl_failure: | |
1017 | dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, | |
1018 | bnx2i_conn->gen_pdu.resp_buf, | |
1019 | bnx2i_conn->gen_pdu.resp_dma_addr); | |
1020 | bnx2i_conn->gen_pdu.resp_buf = NULL; | |
1021 | login_resp_buf_failure: | |
1022 | dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, | |
1023 | bnx2i_conn->gen_pdu.req_buf, | |
1024 | bnx2i_conn->gen_pdu.req_dma_addr); | |
1025 | bnx2i_conn->gen_pdu.req_buf = NULL; | |
1026 | login_req_buf_failure: | |
1027 | iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data, | |
1028 | "login resource alloc failed!!\n"); | |
1029 | return -ENOMEM; | |
1030 | ||
1031 | } | |
1032 | ||
1033 | ||
1034 | /** | |
1035 | * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table. | |
1036 | * @bnx2i_conn: iscsi connection pointer | |
1037 | * | |
1038 | * Allocates buffers and BD tables before shipping requests to cnic | |
1039 | * for PDUs prepared by 'iscsid' daemon | |
1040 | */ | |
1041 | static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn) | |
1042 | { | |
1043 | struct iscsi_bd *bd_tbl; | |
1044 | ||
1045 | bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl; | |
1046 | ||
1047 | bd_tbl->buffer_addr_hi = | |
1048 | (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32); | |
1049 | bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr; | |
1050 | bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr - | |
1051 | bnx2i_conn->gen_pdu.req_buf; | |
1052 | bd_tbl->reserved0 = 0; | |
1053 | bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | | |
1054 | ISCSI_BD_FIRST_IN_BD_CHAIN; | |
1055 | ||
1056 | bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl; | |
1057 | bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32; | |
1058 | bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr; | |
1059 | bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN; | |
1060 | bd_tbl->reserved0 = 0; | |
1061 | bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | | |
1062 | ISCSI_BD_FIRST_IN_BD_CHAIN; | |
1063 | } | |
1064 | ||
1065 | ||
1066 | /** | |
1067 | * bnx2i_iscsi_send_generic_request - called to send mgmt tasks. | |
1068 | * @task: transport layer task pointer | |
1069 | * | |
1070 | * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login, | |
1071 | * Nop-out and Logout requests flow through this path. | |
1072 | */ | |
1073 | static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task) | |
1074 | { | |
1075 | struct bnx2i_cmd *cmd = task->dd_data; | |
1076 | struct bnx2i_conn *bnx2i_conn = cmd->conn; | |
1077 | int rc = 0; | |
1078 | char *buf; | |
1079 | int data_len; | |
1080 | ||
1081 | bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn); | |
1082 | switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { | |
1083 | case ISCSI_OP_LOGIN: | |
1084 | bnx2i_send_iscsi_login(bnx2i_conn, task); | |
1085 | break; | |
1086 | case ISCSI_OP_NOOP_OUT: | |
1087 | data_len = bnx2i_conn->gen_pdu.req_buf_size; | |
1088 | buf = bnx2i_conn->gen_pdu.req_buf; | |
1089 | if (data_len) | |
1090 | rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, | |
cf4e6363 MC |
1091 | buf, data_len, 1); |
1092 | else | |
1093 | rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, | |
cf4e6363 MC |
1094 | NULL, 0, 1); |
1095 | break; | |
1096 | case ISCSI_OP_LOGOUT: | |
1097 | rc = bnx2i_send_iscsi_logout(bnx2i_conn, task); | |
1098 | break; | |
1099 | case ISCSI_OP_SCSI_TMFUNC: | |
1100 | rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task); | |
1101 | break; | |
09813ba5 EW |
1102 | case ISCSI_OP_TEXT: |
1103 | rc = bnx2i_send_iscsi_text(bnx2i_conn, task); | |
1104 | break; | |
cf4e6363 MC |
1105 | default: |
1106 | iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, | |
1107 | "send_gen: unsupported op 0x%x\n", | |
1108 | task->hdr->opcode); | |
1109 | } | |
1110 | return rc; | |
1111 | } | |
1112 | ||
1113 | ||
1114 | /********************************************************************** | |
1115 | * SCSI-ML Interface | |
1116 | **********************************************************************/ | |
1117 | ||
1118 | /** | |
1119 | * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe | |
1120 | * @sc: SCSI-ML command pointer | |
1121 | * @cmd: iscsi cmd pointer | |
1122 | */ | |
1123 | static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd) | |
1124 | { | |
1125 | u32 dword; | |
1126 | int lpcnt; | |
1127 | u8 *srcp; | |
1128 | u32 *dstp; | |
1129 | u32 scsi_lun[2]; | |
1130 | ||
1131 | int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun); | |
1132 | cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]); | |
1133 | cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]); | |
1134 | ||
1135 | lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword); | |
1136 | srcp = (u8 *) sc->cmnd; | |
1137 | dstp = (u32 *) cmd->req.cdb; | |
1138 | while (lpcnt--) { | |
1139 | memcpy(&dword, (const void *) srcp, 4); | |
1140 | *dstp = cpu_to_be32(dword); | |
1141 | srcp += 4; | |
1142 | dstp++; | |
1143 | } | |
1144 | if (sc->cmd_len & 0x3) { | |
1145 | dword = (u32) srcp[0] | ((u32) srcp[1] << 8); | |
1146 | *dstp = cpu_to_be32(dword); | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | static void bnx2i_cleanup_task(struct iscsi_task *task) | |
1151 | { | |
1152 | struct iscsi_conn *conn = task->conn; | |
1153 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
1154 | struct bnx2i_hba *hba = bnx2i_conn->hba; | |
1155 | ||
1156 | /* | |
1157 | * mgmt task or cmd was never sent to us to transmit. | |
1158 | */ | |
1159 | if (!task->sc || task->state == ISCSI_TASK_PENDING) | |
1160 | return; | |
1161 | /* | |
1162 | * need to clean-up task context to claim dma buffers | |
1163 | */ | |
1164 | if (task->state == ISCSI_TASK_ABRT_TMF) { | |
1165 | bnx2i_send_cmd_cleanup_req(hba, task->dd_data); | |
1166 | ||
1167 | spin_unlock_bh(&conn->session->lock); | |
1168 | wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl, | |
1169 | msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); | |
1170 | spin_lock_bh(&conn->session->lock); | |
1171 | } | |
1172 | bnx2i_iscsi_unmap_sg_list(task->dd_data); | |
1173 | } | |
1174 | ||
1175 | /** | |
1176 | * bnx2i_mtask_xmit - transmit mtask to chip for further processing | |
1177 | * @conn: transport layer conn structure pointer | |
1178 | * @task: transport layer command structure pointer | |
1179 | */ | |
1180 | static int | |
1181 | bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) | |
1182 | { | |
1183 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
1184 | struct bnx2i_cmd *cmd = task->dd_data; | |
1185 | ||
1186 | memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); | |
1187 | ||
1188 | bnx2i_setup_cmd_wqe_template(cmd); | |
1189 | bnx2i_conn->gen_pdu.req_buf_size = task->data_count; | |
1190 | if (task->data_count) { | |
1191 | memcpy(bnx2i_conn->gen_pdu.req_buf, task->data, | |
1192 | task->data_count); | |
1193 | bnx2i_conn->gen_pdu.req_wr_ptr = | |
1194 | bnx2i_conn->gen_pdu.req_buf + task->data_count; | |
1195 | } | |
1196 | cmd->conn = conn->dd_data; | |
1197 | cmd->scsi_cmd = NULL; | |
1198 | return bnx2i_iscsi_send_generic_request(task); | |
1199 | } | |
1200 | ||
1201 | /** | |
1202 | * bnx2i_task_xmit - transmit iscsi command to chip for further processing | |
1203 | * @task: transport layer command structure pointer | |
1204 | * | |
1205 | * maps SG buffers and send request to chip/firmware in the form of SQ WQE | |
1206 | */ | |
1207 | static int bnx2i_task_xmit(struct iscsi_task *task) | |
1208 | { | |
1209 | struct iscsi_conn *conn = task->conn; | |
1210 | struct iscsi_session *session = conn->session; | |
1211 | struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); | |
1212 | struct bnx2i_hba *hba = iscsi_host_priv(shost); | |
1213 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
1214 | struct scsi_cmnd *sc = task->sc; | |
1215 | struct bnx2i_cmd *cmd = task->dd_data; | |
12352183 | 1216 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr; |
cf4e6363 | 1217 | |
b5cf6b63 EW |
1218 | if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1 > |
1219 | hba->max_sqes) | |
7287c63e EW |
1220 | return -ENOMEM; |
1221 | ||
cf4e6363 MC |
1222 | /* |
1223 | * If there is no scsi_cmnd this must be a mgmt task | |
1224 | */ | |
1225 | if (!sc) | |
1226 | return bnx2i_mtask_xmit(conn, task); | |
1227 | ||
1228 | bnx2i_setup_cmd_wqe_template(cmd); | |
1229 | cmd->req.op_code = ISCSI_OP_SCSI_CMD; | |
1230 | cmd->conn = bnx2i_conn; | |
1231 | cmd->scsi_cmd = sc; | |
1232 | cmd->req.total_data_transfer_length = scsi_bufflen(sc); | |
1233 | cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn); | |
1234 | ||
1235 | bnx2i_iscsi_map_sg_list(cmd); | |
1236 | bnx2i_cpy_scsi_cdb(sc, cmd); | |
1237 | ||
1238 | cmd->req.op_attr = ISCSI_ATTR_SIMPLE; | |
1239 | if (sc->sc_data_direction == DMA_TO_DEVICE) { | |
1240 | cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE; | |
1241 | cmd->req.itt = task->itt | | |
1242 | (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT); | |
1243 | bnx2i_setup_write_cmd_bd_info(task); | |
1244 | } else { | |
1245 | if (scsi_bufflen(sc)) | |
1246 | cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ; | |
1247 | cmd->req.itt = task->itt | | |
1248 | (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT); | |
1249 | } | |
1250 | ||
1251 | cmd->req.num_bds = cmd->io_tbl.bd_valid; | |
1252 | if (!cmd->io_tbl.bd_valid) { | |
1253 | cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma; | |
1254 | cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32); | |
1255 | cmd->req.num_bds = 1; | |
1256 | } | |
1257 | ||
1258 | bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd); | |
1259 | return 0; | |
1260 | } | |
1261 | ||
1262 | /** | |
1263 | * bnx2i_session_create - create a new iscsi session | |
1264 | * @cmds_max: max commands supported | |
1265 | * @qdepth: scsi queue depth to support | |
1266 | * @initial_cmdsn: initial iscsi CMDSN to be used for this session | |
1267 | * | |
1268 | * Creates a new iSCSI session instance on given device. | |
1269 | */ | |
1270 | static struct iscsi_cls_session * | |
1271 | bnx2i_session_create(struct iscsi_endpoint *ep, | |
1272 | uint16_t cmds_max, uint16_t qdepth, | |
1273 | uint32_t initial_cmdsn) | |
1274 | { | |
1275 | struct Scsi_Host *shost; | |
1276 | struct iscsi_cls_session *cls_session; | |
1277 | struct bnx2i_hba *hba; | |
1278 | struct bnx2i_endpoint *bnx2i_ep; | |
1279 | ||
1280 | if (!ep) { | |
1281 | printk(KERN_ERR "bnx2i: missing ep.\n"); | |
1282 | return NULL; | |
1283 | } | |
1284 | ||
1285 | bnx2i_ep = ep->dd_data; | |
1286 | shost = bnx2i_ep->hba->shost; | |
1287 | hba = iscsi_host_priv(shost); | |
1288 | if (bnx2i_adapter_ready(hba)) | |
1289 | return NULL; | |
1290 | ||
1291 | /* | |
1292 | * user can override hw limit as long as it is within | |
1293 | * the min/max. | |
1294 | */ | |
1295 | if (cmds_max > hba->max_sqes) | |
1296 | cmds_max = hba->max_sqes; | |
1297 | else if (cmds_max < BNX2I_SQ_WQES_MIN) | |
1298 | cmds_max = BNX2I_SQ_WQES_MIN; | |
1299 | ||
1300 | cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost, | |
b8b9e1b8 | 1301 | cmds_max, 0, sizeof(struct bnx2i_cmd), |
cf4e6363 MC |
1302 | initial_cmdsn, ISCSI_MAX_TARGET); |
1303 | if (!cls_session) | |
1304 | return NULL; | |
1305 | ||
1306 | if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data)) | |
1307 | goto session_teardown; | |
1308 | return cls_session; | |
1309 | ||
1310 | session_teardown: | |
1311 | iscsi_session_teardown(cls_session); | |
1312 | return NULL; | |
1313 | } | |
1314 | ||
1315 | ||
1316 | /** | |
1317 | * bnx2i_session_destroy - destroys iscsi session | |
1318 | * @cls_session: pointer to iscsi cls session | |
1319 | * | |
1320 | * Destroys previously created iSCSI session instance and releases | |
1321 | * all resources held by it | |
1322 | */ | |
1323 | static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session) | |
1324 | { | |
1325 | struct iscsi_session *session = cls_session->dd_data; | |
1326 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); | |
1327 | struct bnx2i_hba *hba = iscsi_host_priv(shost); | |
1328 | ||
1329 | bnx2i_destroy_cmd_pool(hba, session); | |
1330 | iscsi_session_teardown(cls_session); | |
1331 | } | |
1332 | ||
1333 | ||
1334 | /** | |
1335 | * bnx2i_conn_create - create iscsi connection instance | |
1336 | * @cls_session: pointer to iscsi cls session | |
1337 | * @cid: iscsi cid as per rfc (not NX2's CID terminology) | |
1338 | * | |
1339 | * Creates a new iSCSI connection instance for a given session | |
1340 | */ | |
1341 | static struct iscsi_cls_conn * | |
1342 | bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) | |
1343 | { | |
1344 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); | |
1345 | struct bnx2i_hba *hba = iscsi_host_priv(shost); | |
1346 | struct bnx2i_conn *bnx2i_conn; | |
1347 | struct iscsi_cls_conn *cls_conn; | |
1348 | struct iscsi_conn *conn; | |
1349 | ||
1350 | cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn), | |
1351 | cid); | |
1352 | if (!cls_conn) | |
1353 | return NULL; | |
1354 | conn = cls_conn->dd_data; | |
1355 | ||
1356 | bnx2i_conn = conn->dd_data; | |
1357 | bnx2i_conn->cls_conn = cls_conn; | |
1358 | bnx2i_conn->hba = hba; | |
b5cf6b63 EW |
1359 | |
1360 | atomic_set(&bnx2i_conn->work_cnt, 0); | |
1361 | ||
cf4e6363 MC |
1362 | /* 'ep' ptr will be assigned in bind() call */ |
1363 | bnx2i_conn->ep = NULL; | |
1364 | init_completion(&bnx2i_conn->cmd_cleanup_cmpl); | |
1365 | ||
1366 | if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) { | |
1367 | iscsi_conn_printk(KERN_ALERT, conn, | |
1368 | "conn_new: login resc alloc failed!!\n"); | |
1369 | goto free_conn; | |
1370 | } | |
1371 | ||
1372 | return cls_conn; | |
1373 | ||
1374 | free_conn: | |
1375 | iscsi_conn_teardown(cls_conn); | |
1376 | return NULL; | |
1377 | } | |
1378 | ||
1379 | /** | |
1380 | * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together | |
1381 | * @cls_session: pointer to iscsi cls session | |
1382 | * @cls_conn: pointer to iscsi cls conn | |
1383 | * @transport_fd: 64-bit EP handle | |
1384 | * @is_leading: leading connection on this session? | |
1385 | * | |
1386 | * Binds together iSCSI session instance, iSCSI connection instance | |
1387 | * and the TCP connection. This routine returns error code if | |
1388 | * TCP connection does not belong on the device iSCSI sess/conn | |
1389 | * is bound | |
1390 | */ | |
1391 | static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session, | |
1392 | struct iscsi_cls_conn *cls_conn, | |
1393 | uint64_t transport_fd, int is_leading) | |
1394 | { | |
1395 | struct iscsi_conn *conn = cls_conn->dd_data; | |
1396 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
1397 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); | |
1398 | struct bnx2i_hba *hba = iscsi_host_priv(shost); | |
1399 | struct bnx2i_endpoint *bnx2i_ep; | |
1400 | struct iscsi_endpoint *ep; | |
1401 | int ret_code; | |
1402 | ||
1403 | ep = iscsi_lookup_endpoint(transport_fd); | |
1404 | if (!ep) | |
1405 | return -EINVAL; | |
842158d7 EW |
1406 | /* |
1407 | * Forcefully terminate all in progress connection recovery at the | |
1408 | * earliest, either in bind(), send_pdu(LOGIN), or conn_start() | |
1409 | */ | |
1410 | if (bnx2i_adapter_ready(hba)) | |
1411 | return -EIO; | |
cf4e6363 MC |
1412 | |
1413 | bnx2i_ep = ep->dd_data; | |
1414 | if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) || | |
1415 | (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) | |
1416 | /* Peer disconnect via' FIN or RST */ | |
1417 | return -EINVAL; | |
1418 | ||
1419 | if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) | |
1420 | return -EINVAL; | |
1421 | ||
1422 | if (bnx2i_ep->hba != hba) { | |
1423 | /* Error - TCP connection does not belong to this device | |
1424 | */ | |
1425 | iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, | |
1426 | "conn bind, ep=0x%p (%s) does not", | |
1427 | bnx2i_ep, bnx2i_ep->hba->netdev->name); | |
1428 | iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, | |
1429 | "belong to hba (%s)\n", | |
1430 | hba->netdev->name); | |
1431 | return -EEXIST; | |
1432 | } | |
cf4e6363 MC |
1433 | bnx2i_ep->conn = bnx2i_conn; |
1434 | bnx2i_conn->ep = bnx2i_ep; | |
1435 | bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid; | |
1436 | bnx2i_conn->fw_cid = bnx2i_ep->ep_cid; | |
cf4e6363 MC |
1437 | |
1438 | ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn, | |
1439 | bnx2i_ep->ep_iscsi_cid); | |
1440 | ||
1441 | /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710 | |
1442 | * driver needs to explicitly replenish RQ index during setup. | |
1443 | */ | |
1444 | if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) | |
1445 | bnx2i_put_rq_buf(bnx2i_conn, 0); | |
1446 | ||
1447 | bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE); | |
1448 | return ret_code; | |
1449 | } | |
1450 | ||
1451 | ||
1452 | /** | |
1453 | * bnx2i_conn_destroy - destroy iscsi connection instance & release resources | |
1454 | * @cls_conn: pointer to iscsi cls conn | |
1455 | * | |
1456 | * Destroy an iSCSI connection instance and release memory resources held by | |
1457 | * this connection | |
1458 | */ | |
1459 | static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn) | |
1460 | { | |
1461 | struct iscsi_conn *conn = cls_conn->dd_data; | |
1462 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
1463 | struct Scsi_Host *shost; | |
1464 | struct bnx2i_hba *hba; | |
b5cf6b63 EW |
1465 | struct bnx2i_work *work, *tmp; |
1466 | unsigned cpu = 0; | |
1467 | struct bnx2i_percpu_s *p; | |
cf4e6363 MC |
1468 | |
1469 | shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); | |
1470 | hba = iscsi_host_priv(shost); | |
1471 | ||
1472 | bnx2i_conn_free_login_resources(hba, bnx2i_conn); | |
b5cf6b63 EW |
1473 | |
1474 | if (atomic_read(&bnx2i_conn->work_cnt)) { | |
1475 | for_each_online_cpu(cpu) { | |
1476 | p = &per_cpu(bnx2i_percpu, cpu); | |
1477 | spin_lock_bh(&p->p_work_lock); | |
1478 | list_for_each_entry_safe(work, tmp, | |
1479 | &p->work_list, list) { | |
1480 | if (work->session == conn->session && | |
1481 | work->bnx2i_conn == bnx2i_conn) { | |
1482 | list_del_init(&work->list); | |
1483 | kfree(work); | |
1484 | if (!atomic_dec_and_test( | |
1485 | &bnx2i_conn->work_cnt)) | |
1486 | break; | |
1487 | } | |
1488 | } | |
1489 | spin_unlock_bh(&p->p_work_lock); | |
1490 | } | |
1491 | } | |
1492 | ||
cf4e6363 MC |
1493 | iscsi_conn_teardown(cls_conn); |
1494 | } | |
1495 | ||
1496 | ||
1497 | /** | |
d8585bcd MC |
1498 | * bnx2i_ep_get_param - return iscsi ep parameter to caller |
1499 | * @ep: pointer to iscsi endpoint | |
cf4e6363 MC |
1500 | * @param: parameter type identifier |
1501 | * @buf: buffer pointer | |
1502 | * | |
d8585bcd | 1503 | * returns iSCSI ep parameters |
cf4e6363 | 1504 | */ |
d8585bcd MC |
1505 | static int bnx2i_ep_get_param(struct iscsi_endpoint *ep, |
1506 | enum iscsi_param param, char *buf) | |
cf4e6363 | 1507 | { |
d8585bcd MC |
1508 | struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; |
1509 | struct bnx2i_hba *hba = bnx2i_ep->hba; | |
1510 | int len = -ENOTCONN; | |
cf4e6363 | 1511 | |
d8585bcd MC |
1512 | if (!hba) |
1513 | return -ENOTCONN; | |
7a2962c7 | 1514 | |
cf4e6363 MC |
1515 | switch (param) { |
1516 | case ISCSI_PARAM_CONN_PORT: | |
d8585bcd MC |
1517 | mutex_lock(&hba->net_dev_lock); |
1518 | if (bnx2i_ep->cm_sk) | |
1519 | len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port); | |
1520 | mutex_unlock(&hba->net_dev_lock); | |
cf4e6363 MC |
1521 | break; |
1522 | case ISCSI_PARAM_CONN_ADDRESS: | |
d8585bcd MC |
1523 | mutex_lock(&hba->net_dev_lock); |
1524 | if (bnx2i_ep->cm_sk) | |
1525 | len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip); | |
1526 | mutex_unlock(&hba->net_dev_lock); | |
cf4e6363 MC |
1527 | break; |
1528 | default: | |
d8585bcd | 1529 | return -ENOSYS; |
cf4e6363 | 1530 | } |
d8585bcd | 1531 | |
cf4e6363 MC |
1532 | return len; |
1533 | } | |
1534 | ||
1535 | /** | |
1536 | * bnx2i_host_get_param - returns host (adapter) related parameters | |
1537 | * @shost: scsi host pointer | |
1538 | * @param: parameter type identifier | |
1539 | * @buf: buffer pointer | |
1540 | */ | |
1541 | static int bnx2i_host_get_param(struct Scsi_Host *shost, | |
1542 | enum iscsi_host_param param, char *buf) | |
1543 | { | |
1544 | struct bnx2i_hba *hba = iscsi_host_priv(shost); | |
1545 | int len = 0; | |
1546 | ||
1547 | switch (param) { | |
1548 | case ISCSI_HOST_PARAM_HWADDRESS: | |
1549 | len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6); | |
1550 | break; | |
1551 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
1552 | len = sprintf(buf, "%s\n", hba->netdev->name); | |
1553 | break; | |
625986c2 MC |
1554 | case ISCSI_HOST_PARAM_IPADDRESS: { |
1555 | struct list_head *active_list = &hba->ep_active_list; | |
1556 | ||
1557 | read_lock_bh(&hba->ep_rdwr_lock); | |
1558 | if (!list_empty(&hba->ep_active_list)) { | |
1559 | struct bnx2i_endpoint *bnx2i_ep; | |
1560 | struct cnic_sock *csk; | |
1561 | ||
1562 | bnx2i_ep = list_first_entry(active_list, | |
1563 | struct bnx2i_endpoint, | |
1564 | link); | |
1565 | csk = bnx2i_ep->cm_sk; | |
1566 | if (test_bit(SK_F_IPV6, &csk->flags)) | |
1567 | len = sprintf(buf, "%pI6\n", csk->src_ip); | |
1568 | else | |
1569 | len = sprintf(buf, "%pI4\n", csk->src_ip); | |
1570 | } | |
1571 | read_unlock_bh(&hba->ep_rdwr_lock); | |
1572 | break; | |
1573 | } | |
cf4e6363 MC |
1574 | default: |
1575 | return iscsi_host_get_param(shost, param, buf); | |
1576 | } | |
1577 | return len; | |
1578 | } | |
1579 | ||
1580 | /** | |
1581 | * bnx2i_conn_start - completes iscsi connection migration to FFP | |
1582 | * @cls_conn: pointer to iscsi cls conn | |
1583 | * | |
1584 | * last call in FFP migration to handover iscsi conn to the driver | |
1585 | */ | |
1586 | static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn) | |
1587 | { | |
1588 | struct iscsi_conn *conn = cls_conn->dd_data; | |
1589 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
1590 | ||
1591 | bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START; | |
1592 | bnx2i_update_iscsi_conn(conn); | |
1593 | ||
1594 | /* | |
1595 | * this should normally not sleep for a long time so it should | |
1596 | * not disrupt the caller. | |
1597 | */ | |
1598 | bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; | |
1599 | bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer; | |
1600 | bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep; | |
1601 | add_timer(&bnx2i_conn->ep->ofld_timer); | |
1602 | /* update iSCSI context for this conn, wait for CNIC to complete */ | |
1603 | wait_event_interruptible(bnx2i_conn->ep->ofld_wait, | |
1604 | bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START); | |
1605 | ||
1606 | if (signal_pending(current)) | |
1607 | flush_signals(current); | |
1608 | del_timer_sync(&bnx2i_conn->ep->ofld_timer); | |
1609 | ||
1610 | iscsi_conn_start(cls_conn); | |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | ||
1615 | /** | |
1616 | * bnx2i_conn_get_stats - returns iSCSI stats | |
1617 | * @cls_conn: pointer to iscsi cls conn | |
1618 | * @stats: pointer to iscsi statistic struct | |
1619 | */ | |
1620 | static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn, | |
1621 | struct iscsi_stats *stats) | |
1622 | { | |
1623 | struct iscsi_conn *conn = cls_conn->dd_data; | |
1624 | ||
1625 | stats->txdata_octets = conn->txdata_octets; | |
1626 | stats->rxdata_octets = conn->rxdata_octets; | |
1627 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
1628 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
1629 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
1630 | stats->datain_pdus = conn->datain_pdus_cnt; | |
1631 | stats->r2t_pdus = conn->r2t_pdus_cnt; | |
1632 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
1633 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
1634 | stats->custom_length = 3; | |
1635 | strcpy(stats->custom[2].desc, "eh_abort_cnt"); | |
1636 | stats->custom[2].value = conn->eh_abort_cnt; | |
1637 | stats->digest_err = 0; | |
1638 | stats->timeout_err = 0; | |
1639 | stats->custom_length = 0; | |
1640 | } | |
1641 | ||
1642 | ||
1643 | /** | |
1644 | * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices | |
1645 | * @dst_addr: target IP address | |
1646 | * | |
1647 | * check if route resolves to BNX2 device | |
1648 | */ | |
1649 | static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr) | |
1650 | { | |
1651 | struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; | |
1652 | struct bnx2i_hba *hba; | |
1653 | struct cnic_dev *cnic = NULL; | |
1654 | ||
cf4e6363 MC |
1655 | hba = get_adapter_list_head(); |
1656 | if (hba && hba->cnic) | |
1657 | cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI); | |
1658 | if (!cnic) { | |
1659 | printk(KERN_ALERT "bnx2i: no route," | |
1660 | "can't connect using cnic\n"); | |
1661 | goto no_nx2_route; | |
1662 | } | |
1663 | hba = bnx2i_find_hba_for_cnic(cnic); | |
1664 | if (!hba) | |
1665 | goto no_nx2_route; | |
1666 | ||
1667 | if (bnx2i_adapter_ready(hba)) { | |
1668 | printk(KERN_ALERT "bnx2i: check route, hba not found\n"); | |
1669 | goto no_nx2_route; | |
1670 | } | |
1671 | if (hba->netdev->mtu > hba->mtu_supported) { | |
1672 | printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n", | |
1673 | hba->netdev->name, hba->netdev->mtu); | |
1674 | printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n", | |
1675 | hba->mtu_supported); | |
1676 | goto no_nx2_route; | |
1677 | } | |
1678 | return hba; | |
1679 | no_nx2_route: | |
1680 | return NULL; | |
1681 | } | |
1682 | ||
1683 | ||
1684 | /** | |
1685 | * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources | |
1686 | * @hba: pointer to adapter instance | |
1687 | * @ep: endpoint (transport indentifier) structure | |
1688 | * | |
1689 | * destroys cm_sock structure and on chip iscsi context | |
1690 | */ | |
1691 | static int bnx2i_tear_down_conn(struct bnx2i_hba *hba, | |
1692 | struct bnx2i_endpoint *ep) | |
1693 | { | |
5bf3f39f | 1694 | if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk) |
cf4e6363 MC |
1695 | hba->cnic->cm_destroy(ep->cm_sk); |
1696 | ||
cf4e6363 MC |
1697 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) && |
1698 | ep->state == EP_STATE_DISCONN_TIMEDOUT) { | |
5bf3f39f EW |
1699 | if (ep->conn && ep->conn->cls_conn && |
1700 | ep->conn->cls_conn->dd_data) { | |
1701 | struct iscsi_conn *conn = ep->conn->cls_conn->dd_data; | |
1702 | ||
1703 | /* Must suspend all rx queue activity for this ep */ | |
1704 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); | |
1705 | } | |
1706 | /* CONN_DISCONNECT timeout may or may not be an issue depending | |
1707 | * on what transcribed in TCP layer, different targets behave | |
1708 | * differently | |
1709 | */ | |
1710 | printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, " | |
1711 | "please submit GRC Dump, NW/PCIe trace, " | |
1712 | "driver msgs to developers for analysis\n", | |
1713 | hba->netdev->name); | |
cf4e6363 MC |
1714 | } |
1715 | ||
1716 | ep->state = EP_STATE_CLEANUP_START; | |
1717 | init_timer(&ep->ofld_timer); | |
e37d2c47 | 1718 | ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies; |
cf4e6363 MC |
1719 | ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
1720 | ep->ofld_timer.data = (unsigned long) ep; | |
1721 | add_timer(&ep->ofld_timer); | |
1722 | ||
1723 | bnx2i_ep_destroy_list_add(hba, ep); | |
1724 | ||
1725 | /* destroy iSCSI context, wait for it to complete */ | |
bee34877 EW |
1726 | if (bnx2i_send_conn_destroy(hba, ep)) |
1727 | ep->state = EP_STATE_CLEANUP_CMPL; | |
1728 | ||
cf4e6363 MC |
1729 | wait_event_interruptible(ep->ofld_wait, |
1730 | (ep->state != EP_STATE_CLEANUP_START)); | |
1731 | ||
1732 | if (signal_pending(current)) | |
1733 | flush_signals(current); | |
1734 | del_timer_sync(&ep->ofld_timer); | |
1735 | ||
1736 | bnx2i_ep_destroy_list_del(hba, ep); | |
1737 | ||
1738 | if (ep->state != EP_STATE_CLEANUP_CMPL) | |
1739 | /* should never happen */ | |
1740 | printk(KERN_ALERT "bnx2i - conn destroy failed\n"); | |
1741 | ||
1742 | return 0; | |
1743 | } | |
1744 | ||
1745 | ||
1746 | /** | |
1747 | * bnx2i_ep_connect - establish TCP connection to target portal | |
1748 | * @shost: scsi host | |
1749 | * @dst_addr: target IP address | |
1750 | * @non_blocking: blocking or non-blocking call | |
1751 | * | |
1752 | * this routine initiates the TCP/IP connection by invoking Option-2 i/f | |
1753 | * with l5_core and the CNIC. This is a multi-step process of resolving | |
1754 | * route to target, create a iscsi connection context, handshaking with | |
1755 | * CNIC module to create/initialize the socket struct and finally | |
1756 | * sending down option-2 request to complete TCP 3-way handshake | |
1757 | */ | |
1758 | static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost, | |
1759 | struct sockaddr *dst_addr, | |
1760 | int non_blocking) | |
1761 | { | |
1762 | u32 iscsi_cid = BNX2I_CID_RESERVED; | |
1763 | struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; | |
1764 | struct sockaddr_in6 *desti6; | |
1765 | struct bnx2i_endpoint *bnx2i_ep; | |
1766 | struct bnx2i_hba *hba; | |
1767 | struct cnic_dev *cnic; | |
1768 | struct cnic_sockaddr saddr; | |
1769 | struct iscsi_endpoint *ep; | |
1770 | int rc = 0; | |
1771 | ||
fac3cc45 | 1772 | if (shost) { |
cf4e6363 MC |
1773 | /* driver is given scsi host to work with */ |
1774 | hba = iscsi_host_priv(shost); | |
fac3cc45 | 1775 | } else |
cf4e6363 MC |
1776 | /* |
1777 | * check if the given destination can be reached through | |
1778 | * a iscsi capable NetXtreme2 device | |
1779 | */ | |
1780 | hba = bnx2i_check_route(dst_addr); | |
fac3cc45 | 1781 | |
a91031a6 | 1782 | if (!hba) { |
490475a9 | 1783 | rc = -EINVAL; |
55e15c97 | 1784 | goto nohba; |
cf4e6363 | 1785 | } |
a91031a6 | 1786 | mutex_lock(&hba->net_dev_lock); |
cf4e6363 | 1787 | |
a91031a6 EW |
1788 | if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) { |
1789 | rc = -EPERM; | |
1790 | goto check_busy; | |
1791 | } | |
cf4e6363 MC |
1792 | cnic = hba->cnic; |
1793 | ep = bnx2i_alloc_ep(hba); | |
1794 | if (!ep) { | |
1795 | rc = -ENOMEM; | |
1796 | goto check_busy; | |
1797 | } | |
1798 | bnx2i_ep = ep->dd_data; | |
1799 | ||
b5cf6b63 | 1800 | atomic_set(&bnx2i_ep->num_active_cmds, 0); |
cf4e6363 MC |
1801 | iscsi_cid = bnx2i_alloc_iscsi_cid(hba); |
1802 | if (iscsi_cid == -1) { | |
a91031a6 EW |
1803 | printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate " |
1804 | "iscsi cid\n", hba->netdev->name); | |
cf4e6363 | 1805 | rc = -ENOMEM; |
a91031a6 EW |
1806 | bnx2i_free_ep(ep); |
1807 | goto check_busy; | |
cf4e6363 MC |
1808 | } |
1809 | bnx2i_ep->hba_age = hba->age; | |
1810 | ||
1811 | rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep); | |
1812 | if (rc != 0) { | |
a91031a6 EW |
1813 | printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error" |
1814 | "\n", hba->netdev->name); | |
cf4e6363 MC |
1815 | rc = -ENOMEM; |
1816 | goto qp_resc_err; | |
1817 | } | |
1818 | ||
1819 | bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid; | |
1820 | bnx2i_ep->state = EP_STATE_OFLD_START; | |
1821 | bnx2i_ep_ofld_list_add(hba, bnx2i_ep); | |
1822 | ||
1823 | init_timer(&bnx2i_ep->ofld_timer); | |
1824 | bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; | |
1825 | bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; | |
1826 | bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; | |
1827 | add_timer(&bnx2i_ep->ofld_timer); | |
1828 | ||
bee34877 EW |
1829 | if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) { |
1830 | if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { | |
1831 | printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n", | |
1832 | hba->netdev->name, bnx2i_ep->ep_iscsi_cid); | |
1833 | rc = -EBUSY; | |
1834 | } else | |
1835 | rc = -ENOSPC; | |
1836 | printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe" | |
1837 | "\n", hba->netdev->name); | |
1838 | bnx2i_ep_ofld_list_del(hba, bnx2i_ep); | |
1839 | goto conn_failed; | |
1840 | } | |
cf4e6363 MC |
1841 | |
1842 | /* Wait for CNIC hardware to setup conn context and return 'cid' */ | |
1843 | wait_event_interruptible(bnx2i_ep->ofld_wait, | |
1844 | bnx2i_ep->state != EP_STATE_OFLD_START); | |
1845 | ||
1846 | if (signal_pending(current)) | |
1847 | flush_signals(current); | |
1848 | del_timer_sync(&bnx2i_ep->ofld_timer); | |
1849 | ||
1850 | bnx2i_ep_ofld_list_del(hba, bnx2i_ep); | |
1851 | ||
1852 | if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) { | |
a91031a6 EW |
1853 | if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { |
1854 | printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n", | |
1855 | hba->netdev->name, bnx2i_ep->ep_iscsi_cid); | |
1856 | rc = -EBUSY; | |
1857 | } else | |
1858 | rc = -ENOSPC; | |
cf4e6363 MC |
1859 | goto conn_failed; |
1860 | } | |
1861 | ||
1862 | rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid, | |
1863 | iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep); | |
1864 | if (rc) { | |
1865 | rc = -EINVAL; | |
a91031a6 EW |
1866 | /* Need to terminate and cleanup the connection */ |
1867 | goto release_ep; | |
cf4e6363 MC |
1868 | } |
1869 | ||
1870 | bnx2i_ep->cm_sk->rcv_buf = 256 * 1024; | |
1871 | bnx2i_ep->cm_sk->snd_buf = 256 * 1024; | |
1872 | clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags); | |
1873 | ||
1874 | memset(&saddr, 0, sizeof(saddr)); | |
1875 | if (dst_addr->sa_family == AF_INET) { | |
1876 | desti = (struct sockaddr_in *) dst_addr; | |
1877 | saddr.remote.v4 = *desti; | |
1878 | saddr.local.v4.sin_family = desti->sin_family; | |
1879 | } else if (dst_addr->sa_family == AF_INET6) { | |
1880 | desti6 = (struct sockaddr_in6 *) dst_addr; | |
1881 | saddr.remote.v6 = *desti6; | |
1882 | saddr.local.v6.sin6_family = desti6->sin6_family; | |
1883 | } | |
1884 | ||
1885 | bnx2i_ep->timestamp = jiffies; | |
1886 | bnx2i_ep->state = EP_STATE_CONNECT_START; | |
1887 | if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { | |
1888 | rc = -EINVAL; | |
1889 | goto conn_failed; | |
1890 | } else | |
1891 | rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr); | |
cf4e6363 MC |
1892 | if (rc) |
1893 | goto release_ep; | |
1894 | ||
46012e8b EW |
1895 | bnx2i_ep_active_list_add(hba, bnx2i_ep); |
1896 | ||
cf4e6363 | 1897 | if (bnx2i_map_ep_dbell_regs(bnx2i_ep)) |
46012e8b EW |
1898 | goto del_active_ep; |
1899 | ||
cf4e6363 MC |
1900 | mutex_unlock(&hba->net_dev_lock); |
1901 | return ep; | |
1902 | ||
46012e8b EW |
1903 | del_active_ep: |
1904 | bnx2i_ep_active_list_del(hba, bnx2i_ep); | |
cf4e6363 MC |
1905 | release_ep: |
1906 | if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { | |
1907 | mutex_unlock(&hba->net_dev_lock); | |
1908 | return ERR_PTR(rc); | |
1909 | } | |
1910 | conn_failed: | |
cf4e6363 MC |
1911 | bnx2i_free_qp_resc(hba, bnx2i_ep); |
1912 | qp_resc_err: | |
1913 | bnx2i_free_ep(ep); | |
cf4e6363 | 1914 | check_busy: |
55e15c97 EW |
1915 | mutex_unlock(&hba->net_dev_lock); |
1916 | nohba: | |
cf4e6363 MC |
1917 | return ERR_PTR(rc); |
1918 | } | |
1919 | ||
1920 | ||
1921 | /** | |
1922 | * bnx2i_ep_poll - polls for TCP connection establishement | |
1923 | * @ep: TCP connection (endpoint) handle | |
1924 | * @timeout_ms: timeout value in milli secs | |
1925 | * | |
1926 | * polls for TCP connect request to complete | |
1927 | */ | |
1928 | static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) | |
1929 | { | |
1930 | struct bnx2i_endpoint *bnx2i_ep; | |
1931 | int rc = 0; | |
1932 | ||
1933 | bnx2i_ep = ep->dd_data; | |
1934 | if ((bnx2i_ep->state == EP_STATE_IDLE) || | |
1935 | (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) || | |
1936 | (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) | |
1937 | return -1; | |
1938 | if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL) | |
1939 | return 1; | |
1940 | ||
1941 | rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait, | |
1942 | ((bnx2i_ep->state == | |
1943 | EP_STATE_OFLD_FAILED) || | |
1944 | (bnx2i_ep->state == | |
1945 | EP_STATE_CONNECT_FAILED) || | |
1946 | (bnx2i_ep->state == | |
1947 | EP_STATE_CONNECT_COMPL)), | |
1948 | msecs_to_jiffies(timeout_ms)); | |
490475a9 | 1949 | if (bnx2i_ep->state == EP_STATE_OFLD_FAILED) |
cf4e6363 MC |
1950 | rc = -1; |
1951 | ||
1952 | if (rc > 0) | |
1953 | return 1; | |
1954 | else if (!rc) | |
1955 | return 0; /* timeout */ | |
1956 | else | |
1957 | return rc; | |
1958 | } | |
1959 | ||
1960 | ||
1961 | /** | |
1962 | * bnx2i_ep_tcp_conn_active - check EP state transition | |
1963 | * @ep: endpoint pointer | |
1964 | * | |
1965 | * check if underlying TCP connection is active | |
1966 | */ | |
1967 | static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep) | |
1968 | { | |
1969 | int ret; | |
1970 | int cnic_dev_10g = 0; | |
1971 | ||
1972 | if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) | |
1973 | cnic_dev_10g = 1; | |
1974 | ||
1975 | switch (bnx2i_ep->state) { | |
cf4e6363 MC |
1976 | case EP_STATE_CLEANUP_FAILED: |
1977 | case EP_STATE_OFLD_FAILED: | |
1978 | case EP_STATE_DISCONN_TIMEDOUT: | |
1979 | ret = 0; | |
1980 | break; | |
252e4480 | 1981 | case EP_STATE_CONNECT_START: |
ec8933b4 | 1982 | case EP_STATE_CONNECT_FAILED: |
cf4e6363 MC |
1983 | case EP_STATE_CONNECT_COMPL: |
1984 | case EP_STATE_ULP_UPDATE_START: | |
1985 | case EP_STATE_ULP_UPDATE_COMPL: | |
1986 | case EP_STATE_TCP_FIN_RCVD: | |
2eefb20d EW |
1987 | case EP_STATE_LOGOUT_SENT: |
1988 | case EP_STATE_LOGOUT_RESP_RCVD: | |
cf4e6363 MC |
1989 | case EP_STATE_ULP_UPDATE_FAILED: |
1990 | ret = 1; | |
1991 | break; | |
1992 | case EP_STATE_TCP_RST_RCVD: | |
cf4e6363 | 1993 | if (cnic_dev_10g) |
cf4e6363 | 1994 | ret = 0; |
94810e82 EW |
1995 | else |
1996 | ret = 1; | |
cf4e6363 MC |
1997 | break; |
1998 | default: | |
1999 | ret = 0; | |
2000 | } | |
2001 | ||
2002 | return ret; | |
2003 | } | |
2004 | ||
2005 | ||
6447f286 EW |
2006 | /* |
2007 | * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw | |
2008 | * @ep: TCP connection (bnx2i endpoint) handle | |
cf4e6363 MC |
2009 | * |
2010 | * executes TCP connection teardown process | |
2011 | */ | |
6447f286 | 2012 | int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep) |
cf4e6363 | 2013 | { |
6447f286 | 2014 | struct bnx2i_hba *hba = bnx2i_ep->hba; |
cf4e6363 | 2015 | struct cnic_dev *cnic; |
6447f286 EW |
2016 | struct iscsi_session *session = NULL; |
2017 | struct iscsi_conn *conn = NULL; | |
2018 | int ret = 0; | |
2eefb20d EW |
2019 | int close = 0; |
2020 | int close_ret = 0; | |
cf4e6363 | 2021 | |
6447f286 EW |
2022 | if (!hba) |
2023 | return 0; | |
cf4e6363 | 2024 | |
6447f286 EW |
2025 | cnic = hba->cnic; |
2026 | if (!cnic) | |
2027 | return 0; | |
2028 | ||
a91031a6 EW |
2029 | if (bnx2i_ep->state == EP_STATE_IDLE || |
2030 | bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) | |
250ae982 EW |
2031 | return 0; |
2032 | ||
6447f286 EW |
2033 | if (!bnx2i_ep_tcp_conn_active(bnx2i_ep)) |
2034 | goto destroy_conn; | |
cf4e6363 MC |
2035 | |
2036 | if (bnx2i_ep->conn) { | |
6447f286 | 2037 | conn = bnx2i_ep->conn->cls_conn->dd_data; |
cf4e6363 | 2038 | session = conn->session; |
cf4e6363 MC |
2039 | } |
2040 | ||
cf4e6363 | 2041 | init_timer(&bnx2i_ep->ofld_timer); |
e37d2c47 | 2042 | bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies; |
cf4e6363 MC |
2043 | bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
2044 | bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; | |
2045 | add_timer(&bnx2i_ep->ofld_timer); | |
2046 | ||
2eefb20d | 2047 | if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) |
6447f286 | 2048 | goto out; |
cf4e6363 | 2049 | |
2eefb20d EW |
2050 | if (session) { |
2051 | spin_lock_bh(&session->lock); | |
2052 | if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) { | |
2053 | if (session->state == ISCSI_STATE_LOGGING_OUT) { | |
2054 | if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) { | |
2055 | /* Logout sent, but no resp */ | |
a91031a6 EW |
2056 | printk(KERN_ALERT "bnx2i (%s): WARNING" |
2057 | " logout response was not " | |
2058 | "received!\n", | |
2059 | bnx2i_ep->hba->netdev->name); | |
2eefb20d EW |
2060 | } else if (bnx2i_ep->state == |
2061 | EP_STATE_LOGOUT_RESP_RCVD) | |
2062 | close = 1; | |
2063 | } | |
2064 | } else | |
2065 | close = 1; | |
2066 | ||
2067 | spin_unlock_bh(&session->lock); | |
2068 | } | |
2069 | ||
2070 | bnx2i_ep->state = EP_STATE_DISCONN_START; | |
2071 | ||
2072 | if (close) | |
2073 | close_ret = cnic->cm_close(bnx2i_ep->cm_sk); | |
2074 | else | |
2075 | close_ret = cnic->cm_abort(bnx2i_ep->cm_sk); | |
2076 | ||
2077 | if (close_ret) | |
a91031a6 | 2078 | printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n", |
2c2255e0 EW |
2079 | bnx2i_ep->hba->netdev->name, close, close_ret); |
2080 | else | |
2081 | /* wait for option-2 conn teardown */ | |
2082 | wait_event_interruptible(bnx2i_ep->ofld_wait, | |
cf4e6363 MC |
2083 | bnx2i_ep->state != EP_STATE_DISCONN_START); |
2084 | ||
2085 | if (signal_pending(current)) | |
2086 | flush_signals(current); | |
2087 | del_timer_sync(&bnx2i_ep->ofld_timer); | |
2088 | ||
6447f286 | 2089 | destroy_conn: |
46012e8b | 2090 | bnx2i_ep_active_list_del(hba, bnx2i_ep); |
6447f286 | 2091 | if (bnx2i_tear_down_conn(hba, bnx2i_ep)) |
a91031a6 | 2092 | return -EINVAL; |
6447f286 EW |
2093 | out: |
2094 | bnx2i_ep->state = EP_STATE_IDLE; | |
2095 | return ret; | |
2096 | } | |
2097 | ||
2098 | ||
2099 | /** | |
2100 | * bnx2i_ep_disconnect - executes TCP connection teardown process | |
2101 | * @ep: TCP connection (iscsi endpoint) handle | |
2102 | * | |
2103 | * executes TCP connection teardown process | |
2104 | */ | |
2105 | static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep) | |
2106 | { | |
2107 | struct bnx2i_endpoint *bnx2i_ep; | |
2108 | struct bnx2i_conn *bnx2i_conn = NULL; | |
2109 | struct iscsi_conn *conn = NULL; | |
2110 | struct bnx2i_hba *hba; | |
2111 | ||
2112 | bnx2i_ep = ep->dd_data; | |
2113 | ||
2114 | /* driver should not attempt connection cleanup until TCP_CONNECT | |
2115 | * completes either successfully or fails. Timeout is 9-secs, so | |
2116 | * wait for it to complete | |
2117 | */ | |
2118 | while ((bnx2i_ep->state == EP_STATE_CONNECT_START) && | |
2119 | !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ))) | |
2120 | msleep(250); | |
2121 | ||
2122 | if (bnx2i_ep->conn) { | |
2123 | bnx2i_conn = bnx2i_ep->conn; | |
2124 | conn = bnx2i_conn->cls_conn->dd_data; | |
2125 | iscsi_suspend_queue(conn); | |
2126 | } | |
2127 | hba = bnx2i_ep->hba; | |
2128 | ||
2129 | mutex_lock(&hba->net_dev_lock); | |
2130 | ||
a91031a6 EW |
2131 | if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) |
2132 | goto out; | |
6447f286 | 2133 | |
a91031a6 | 2134 | if (bnx2i_ep->state == EP_STATE_IDLE) |
6447f286 EW |
2135 | goto free_resc; |
2136 | ||
a91031a6 EW |
2137 | if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || |
2138 | (bnx2i_ep->hba_age != hba->age)) { | |
2139 | bnx2i_ep_active_list_del(hba, bnx2i_ep); | |
6447f286 | 2140 | goto free_resc; |
a91031a6 | 2141 | } |
6447f286 EW |
2142 | |
2143 | /* Do all chip cleanup here */ | |
2144 | if (bnx2i_hw_ep_disconnect(bnx2i_ep)) { | |
cf4e6363 MC |
2145 | mutex_unlock(&hba->net_dev_lock); |
2146 | return; | |
2147 | } | |
2148 | free_resc: | |
cf4e6363 | 2149 | bnx2i_free_qp_resc(hba, bnx2i_ep); |
a91031a6 | 2150 | |
cf4e6363 MC |
2151 | if (bnx2i_conn) |
2152 | bnx2i_conn->ep = NULL; | |
2153 | ||
2154 | bnx2i_free_ep(ep); | |
a91031a6 | 2155 | out: |
6447f286 | 2156 | mutex_unlock(&hba->net_dev_lock); |
490475a9 AV |
2157 | |
2158 | wake_up_interruptible(&hba->eh_wait); | |
cf4e6363 MC |
2159 | } |
2160 | ||
2161 | ||
2162 | /** | |
2163 | * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler | |
2164 | * @buf: pointer to buffer containing iscsi path message | |
2165 | * | |
2166 | */ | |
2167 | static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params) | |
2168 | { | |
2169 | struct bnx2i_hba *hba = iscsi_host_priv(shost); | |
2170 | char *buf = (char *) params; | |
2171 | u16 len = sizeof(*params); | |
2172 | ||
2173 | /* handled by cnic driver */ | |
2174 | hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf, | |
2175 | len); | |
2176 | ||
2177 | return 0; | |
2178 | } | |
2179 | ||
3128c6c7 MC |
2180 | static mode_t bnx2i_attr_is_visible(int param_type, int param) |
2181 | { | |
2182 | switch (param_type) { | |
f27fb2ef MC |
2183 | case ISCSI_HOST_PARAM: |
2184 | switch (param) { | |
2185 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2186 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2187 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2188 | return S_IRUGO; | |
2189 | default: | |
2190 | return 0; | |
2191 | } | |
3128c6c7 MC |
2192 | case ISCSI_PARAM: |
2193 | switch (param) { | |
2194 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
2195 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
2196 | case ISCSI_PARAM_HDRDGST_EN: | |
2197 | case ISCSI_PARAM_DATADGST_EN: | |
2198 | case ISCSI_PARAM_CONN_ADDRESS: | |
2199 | case ISCSI_PARAM_CONN_PORT: | |
2200 | case ISCSI_PARAM_EXP_STATSN: | |
2201 | case ISCSI_PARAM_PERSISTENT_ADDRESS: | |
2202 | case ISCSI_PARAM_PERSISTENT_PORT: | |
2203 | case ISCSI_PARAM_PING_TMO: | |
2204 | case ISCSI_PARAM_RECV_TMO: | |
1d063c17 MC |
2205 | case ISCSI_PARAM_INITIAL_R2T_EN: |
2206 | case ISCSI_PARAM_MAX_R2T: | |
2207 | case ISCSI_PARAM_IMM_DATA_EN: | |
2208 | case ISCSI_PARAM_FIRST_BURST: | |
2209 | case ISCSI_PARAM_MAX_BURST: | |
2210 | case ISCSI_PARAM_PDU_INORDER_EN: | |
2211 | case ISCSI_PARAM_DATASEQ_INORDER_EN: | |
2212 | case ISCSI_PARAM_ERL: | |
2213 | case ISCSI_PARAM_TARGET_NAME: | |
2214 | case ISCSI_PARAM_TPGT: | |
2215 | case ISCSI_PARAM_USERNAME: | |
2216 | case ISCSI_PARAM_PASSWORD: | |
2217 | case ISCSI_PARAM_USERNAME_IN: | |
2218 | case ISCSI_PARAM_PASSWORD_IN: | |
2219 | case ISCSI_PARAM_FAST_ABORT: | |
2220 | case ISCSI_PARAM_ABORT_TMO: | |
2221 | case ISCSI_PARAM_LU_RESET_TMO: | |
2222 | case ISCSI_PARAM_TGT_RESET_TMO: | |
2223 | case ISCSI_PARAM_IFACE_NAME: | |
2224 | case ISCSI_PARAM_INITIATOR_NAME: | |
3128c6c7 MC |
2225 | return S_IRUGO; |
2226 | default: | |
2227 | return 0; | |
2228 | } | |
2229 | } | |
2230 | ||
2231 | return 0; | |
2232 | } | |
cf4e6363 MC |
2233 | |
2234 | /* | |
2235 | * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template | |
2236 | * used while registering with the scsi host and iSCSI transport module. | |
2237 | */ | |
2238 | static struct scsi_host_template bnx2i_host_template = { | |
2239 | .module = THIS_MODULE, | |
2240 | .name = "Broadcom Offload iSCSI Initiator", | |
2241 | .proc_name = "bnx2i", | |
2242 | .queuecommand = iscsi_queuecommand, | |
2243 | .eh_abort_handler = iscsi_eh_abort, | |
2244 | .eh_device_reset_handler = iscsi_eh_device_reset, | |
309ce156 | 2245 | .eh_target_reset_handler = iscsi_eh_recover_target, |
9f9127fd | 2246 | .change_queue_depth = iscsi_change_queue_depth, |
b5cf6b63 | 2247 | .can_queue = 2048, |
cf4e6363 | 2248 | .max_sectors = 127, |
b5cf6b63 | 2249 | .cmd_per_lun = 128, |
cf4e6363 MC |
2250 | .this_id = -1, |
2251 | .use_clustering = ENABLE_CLUSTERING, | |
2252 | .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, | |
2253 | .shost_attrs = bnx2i_dev_attributes, | |
2254 | }; | |
2255 | ||
2256 | struct iscsi_transport bnx2i_iscsi_transport = { | |
2257 | .owner = THIS_MODULE, | |
2258 | .name = "bnx2i", | |
2259 | .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | | |
2260 | CAP_MULTI_R2T | CAP_DATADGST | | |
09813ba5 EW |
2261 | CAP_DATA_PATH_OFFLOAD | |
2262 | CAP_TEXT_NEGO, | |
cf4e6363 MC |
2263 | .create_session = bnx2i_session_create, |
2264 | .destroy_session = bnx2i_session_destroy, | |
2265 | .create_conn = bnx2i_conn_create, | |
2266 | .bind_conn = bnx2i_conn_bind, | |
2267 | .destroy_conn = bnx2i_conn_destroy, | |
3128c6c7 | 2268 | .attr_is_visible = bnx2i_attr_is_visible, |
cf4e6363 | 2269 | .set_param = iscsi_set_param, |
d8585bcd | 2270 | .get_conn_param = iscsi_conn_get_param, |
cf4e6363 MC |
2271 | .get_session_param = iscsi_session_get_param, |
2272 | .get_host_param = bnx2i_host_get_param, | |
2273 | .start_conn = bnx2i_conn_start, | |
2274 | .stop_conn = iscsi_conn_stop, | |
2275 | .send_pdu = iscsi_conn_send_pdu, | |
2276 | .xmit_task = bnx2i_task_xmit, | |
2277 | .get_stats = bnx2i_conn_get_stats, | |
2278 | /* TCP connect - disconnect - option-2 interface calls */ | |
d8585bcd | 2279 | .get_ep_param = bnx2i_ep_get_param, |
cf4e6363 MC |
2280 | .ep_connect = bnx2i_ep_connect, |
2281 | .ep_poll = bnx2i_ep_poll, | |
2282 | .ep_disconnect = bnx2i_ep_disconnect, | |
2283 | .set_path = bnx2i_nl_set_path, | |
2284 | /* Error recovery timeout call */ | |
2285 | .session_recovery_timedout = iscsi_session_recovery_timedout, | |
2286 | .cleanup_task = bnx2i_cleanup_task, | |
2287 | }; |