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3287e96a | 1 | // SPDX-License-Identifier: GPL-2.0-only |
61d8658b DC |
2 | /* |
3 | * QLogic FCoE Offload Driver | |
5d1c8b5b | 4 | * Copyright (c) 2016-2018 Cavium Inc. |
61d8658b DC |
5 | */ |
6 | #include <linux/spinlock.h> | |
7 | #include <linux/vmalloc.h> | |
8 | #include "qedf.h" | |
9 | #include <scsi/scsi_tcq.h> | |
10 | ||
11 | void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, | |
12 | unsigned int timer_msec) | |
13 | { | |
14 | queue_delayed_work(qedf->timer_work_queue, &io_req->timeout_work, | |
15 | msecs_to_jiffies(timer_msec)); | |
16 | } | |
17 | ||
18 | static void qedf_cmd_timeout(struct work_struct *work) | |
19 | { | |
20 | ||
21 | struct qedf_ioreq *io_req = | |
22 | container_of(work, struct qedf_ioreq, timeout_work.work); | |
f3690a89 CD |
23 | struct qedf_ctx *qedf; |
24 | struct qedf_rport *fcport; | |
61d8658b | 25 | |
f3690a89 CD |
26 | fcport = io_req->fcport; |
27 | if (io_req->fcport == NULL) { | |
28 | QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); | |
29 | return; | |
30 | } | |
31 | ||
32 | qedf = fcport->qedf; | |
33 | ||
61d8658b DC |
34 | switch (io_req->cmd_type) { |
35 | case QEDF_ABTS: | |
f3690a89 | 36 | if (qedf == NULL) { |
69ef2c69 SK |
37 | QEDF_INFO(NULL, QEDF_LOG_IO, |
38 | "qedf is NULL for ABTS xid=0x%x.\n", | |
39 | io_req->xid); | |
f3690a89 CD |
40 | return; |
41 | } | |
42 | ||
61d8658b DC |
43 | QEDF_ERR((&qedf->dbg_ctx), "ABTS timeout, xid=0x%x.\n", |
44 | io_req->xid); | |
45 | /* Cleanup timed out ABTS */ | |
46 | qedf_initiate_cleanup(io_req, true); | |
47 | complete(&io_req->abts_done); | |
48 | ||
49 | /* | |
50 | * Need to call kref_put for reference taken when initiate_abts | |
51 | * was called since abts_compl won't be called now that we've | |
52 | * cleaned up the task. | |
53 | */ | |
54 | kref_put(&io_req->refcount, qedf_release_cmd); | |
55 | ||
69ef2c69 SK |
56 | /* Clear in abort bit now that we're done with the command */ |
57 | clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); | |
58 | ||
61d8658b DC |
59 | /* |
60 | * Now that the original I/O and the ABTS are complete see | |
61 | * if we need to reconnect to the target. | |
62 | */ | |
63 | qedf_restart_rport(fcport); | |
64 | break; | |
65 | case QEDF_ELS: | |
69ef2c69 SK |
66 | if (!qedf) { |
67 | QEDF_INFO(NULL, QEDF_LOG_IO, | |
68 | "qedf is NULL for ELS xid=0x%x.\n", | |
69 | io_req->xid); | |
70 | return; | |
71 | } | |
72 | /* ELS request no longer outstanding since it timed out */ | |
73 | clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); | |
74 | ||
61d8658b DC |
75 | kref_get(&io_req->refcount); |
76 | /* | |
77 | * Don't attempt to clean an ELS timeout as any subseqeunt | |
78 | * ABTS or cleanup requests just hang. For now just free | |
79 | * the resources of the original I/O and the RRQ | |
80 | */ | |
81 | QEDF_ERR(&(qedf->dbg_ctx), "ELS timeout, xid=0x%x.\n", | |
82 | io_req->xid); | |
39d0357d | 83 | qedf_initiate_cleanup(io_req, true); |
61d8658b DC |
84 | io_req->event = QEDF_IOREQ_EV_ELS_TMO; |
85 | /* Call callback function to complete command */ | |
86 | if (io_req->cb_func && io_req->cb_arg) { | |
61d8658b DC |
87 | io_req->cb_func(io_req->cb_arg); |
88 | io_req->cb_arg = NULL; | |
89 | } | |
61d8658b DC |
90 | kref_put(&io_req->refcount, qedf_release_cmd); |
91 | break; | |
92 | case QEDF_SEQ_CLEANUP: | |
93 | QEDF_ERR(&(qedf->dbg_ctx), "Sequence cleanup timeout, " | |
94 | "xid=0x%x.\n", io_req->xid); | |
95 | qedf_initiate_cleanup(io_req, true); | |
96 | io_req->event = QEDF_IOREQ_EV_ELS_TMO; | |
97 | qedf_process_seq_cleanup_compl(qedf, NULL, io_req); | |
98 | break; | |
99 | default: | |
e82e6ff7 SK |
100 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
101 | "Hit default case, xid=0x%x.\n", io_req->xid); | |
61d8658b DC |
102 | break; |
103 | } | |
104 | } | |
105 | ||
106 | void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr) | |
107 | { | |
108 | struct io_bdt *bdt_info; | |
109 | struct qedf_ctx *qedf = cmgr->qedf; | |
110 | size_t bd_tbl_sz; | |
650ce64c | 111 | u16 min_xid = 0; |
61d8658b DC |
112 | u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1); |
113 | int num_ios; | |
114 | int i; | |
115 | struct qedf_ioreq *io_req; | |
116 | ||
117 | num_ios = max_xid - min_xid + 1; | |
118 | ||
119 | /* Free fcoe_bdt_ctx structures */ | |
e82e6ff7 SK |
120 | if (!cmgr->io_bdt_pool) { |
121 | QEDF_ERR(&qedf->dbg_ctx, "io_bdt_pool is NULL.\n"); | |
61d8658b | 122 | goto free_cmd_pool; |
e82e6ff7 | 123 | } |
61d8658b | 124 | |
be086e7c | 125 | bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge); |
61d8658b DC |
126 | for (i = 0; i < num_ios; i++) { |
127 | bdt_info = cmgr->io_bdt_pool[i]; | |
128 | if (bdt_info->bd_tbl) { | |
129 | dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz, | |
130 | bdt_info->bd_tbl, bdt_info->bd_tbl_dma); | |
131 | bdt_info->bd_tbl = NULL; | |
132 | } | |
133 | } | |
134 | ||
135 | /* Destroy io_bdt pool */ | |
136 | for (i = 0; i < num_ios; i++) { | |
137 | kfree(cmgr->io_bdt_pool[i]); | |
138 | cmgr->io_bdt_pool[i] = NULL; | |
139 | } | |
140 | ||
141 | kfree(cmgr->io_bdt_pool); | |
142 | cmgr->io_bdt_pool = NULL; | |
143 | ||
144 | free_cmd_pool: | |
145 | ||
146 | for (i = 0; i < num_ios; i++) { | |
147 | io_req = &cmgr->cmds[i]; | |
be086e7c MY |
148 | kfree(io_req->sgl_task_params); |
149 | kfree(io_req->task_params); | |
61d8658b DC |
150 | /* Make sure we free per command sense buffer */ |
151 | if (io_req->sense_buffer) | |
152 | dma_free_coherent(&qedf->pdev->dev, | |
153 | QEDF_SCSI_SENSE_BUFFERSIZE, io_req->sense_buffer, | |
154 | io_req->sense_buffer_dma); | |
155 | cancel_delayed_work_sync(&io_req->rrq_work); | |
156 | } | |
157 | ||
158 | /* Free command manager itself */ | |
159 | vfree(cmgr); | |
160 | } | |
161 | ||
162 | static void qedf_handle_rrq(struct work_struct *work) | |
163 | { | |
164 | struct qedf_ioreq *io_req = | |
165 | container_of(work, struct qedf_ioreq, rrq_work.work); | |
166 | ||
faea5719 | 167 | atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_ACTIVE); |
61d8658b DC |
168 | qedf_send_rrq(io_req); |
169 | ||
170 | } | |
171 | ||
172 | struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf) | |
173 | { | |
174 | struct qedf_cmd_mgr *cmgr; | |
175 | struct io_bdt *bdt_info; | |
176 | struct qedf_ioreq *io_req; | |
177 | u16 xid; | |
178 | int i; | |
179 | int num_ios; | |
650ce64c | 180 | u16 min_xid = 0; |
61d8658b DC |
181 | u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1); |
182 | ||
183 | /* Make sure num_queues is already set before calling this function */ | |
184 | if (!qedf->num_queues) { | |
185 | QEDF_ERR(&(qedf->dbg_ctx), "num_queues is not set.\n"); | |
186 | return NULL; | |
187 | } | |
188 | ||
189 | if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { | |
190 | QEDF_WARN(&(qedf->dbg_ctx), "Invalid min_xid 0x%x and " | |
191 | "max_xid 0x%x.\n", min_xid, max_xid); | |
192 | return NULL; | |
193 | } | |
194 | ||
195 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "min xid 0x%x, max xid " | |
196 | "0x%x.\n", min_xid, max_xid); | |
197 | ||
198 | num_ios = max_xid - min_xid + 1; | |
199 | ||
200 | cmgr = vzalloc(sizeof(struct qedf_cmd_mgr)); | |
201 | if (!cmgr) { | |
202 | QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc cmd mgr.\n"); | |
203 | return NULL; | |
204 | } | |
205 | ||
206 | cmgr->qedf = qedf; | |
207 | spin_lock_init(&cmgr->lock); | |
208 | ||
209 | /* | |
be086e7c | 210 | * Initialize I/O request fields. |
61d8658b | 211 | */ |
650ce64c | 212 | xid = 0; |
61d8658b DC |
213 | |
214 | for (i = 0; i < num_ios; i++) { | |
215 | io_req = &cmgr->cmds[i]; | |
216 | INIT_DELAYED_WORK(&io_req->timeout_work, qedf_cmd_timeout); | |
217 | ||
218 | io_req->xid = xid++; | |
219 | ||
220 | INIT_DELAYED_WORK(&io_req->rrq_work, qedf_handle_rrq); | |
221 | ||
222 | /* Allocate DMA memory to hold sense buffer */ | |
223 | io_req->sense_buffer = dma_alloc_coherent(&qedf->pdev->dev, | |
224 | QEDF_SCSI_SENSE_BUFFERSIZE, &io_req->sense_buffer_dma, | |
225 | GFP_KERNEL); | |
e82e6ff7 SK |
226 | if (!io_req->sense_buffer) { |
227 | QEDF_ERR(&qedf->dbg_ctx, | |
228 | "Failed to alloc sense buffer.\n"); | |
61d8658b | 229 | goto mem_err; |
e82e6ff7 | 230 | } |
be086e7c MY |
231 | |
232 | /* Allocate task parameters to pass to f/w init funcions */ | |
233 | io_req->task_params = kzalloc(sizeof(*io_req->task_params), | |
234 | GFP_KERNEL); | |
235 | if (!io_req->task_params) { | |
236 | QEDF_ERR(&(qedf->dbg_ctx), | |
237 | "Failed to allocate task_params for xid=0x%x\n", | |
238 | i); | |
239 | goto mem_err; | |
240 | } | |
241 | ||
242 | /* | |
243 | * Allocate scatter/gather list info to pass to f/w init | |
244 | * functions. | |
245 | */ | |
246 | io_req->sgl_task_params = kzalloc( | |
247 | sizeof(struct scsi_sgl_task_params), GFP_KERNEL); | |
248 | if (!io_req->sgl_task_params) { | |
249 | QEDF_ERR(&(qedf->dbg_ctx), | |
250 | "Failed to allocate sgl_task_params for xid=0x%x\n", | |
251 | i); | |
252 | goto mem_err; | |
253 | } | |
61d8658b DC |
254 | } |
255 | ||
256 | /* Allocate pool of io_bdts - one for each qedf_ioreq */ | |
257 | cmgr->io_bdt_pool = kmalloc_array(num_ios, sizeof(struct io_bdt *), | |
258 | GFP_KERNEL); | |
259 | ||
260 | if (!cmgr->io_bdt_pool) { | |
261 | QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc io_bdt_pool.\n"); | |
262 | goto mem_err; | |
263 | } | |
264 | ||
265 | for (i = 0; i < num_ios; i++) { | |
266 | cmgr->io_bdt_pool[i] = kmalloc(sizeof(struct io_bdt), | |
267 | GFP_KERNEL); | |
268 | if (!cmgr->io_bdt_pool[i]) { | |
be086e7c MY |
269 | QEDF_WARN(&(qedf->dbg_ctx), |
270 | "Failed to alloc io_bdt_pool[%d].\n", i); | |
61d8658b DC |
271 | goto mem_err; |
272 | } | |
273 | } | |
274 | ||
275 | for (i = 0; i < num_ios; i++) { | |
276 | bdt_info = cmgr->io_bdt_pool[i]; | |
277 | bdt_info->bd_tbl = dma_alloc_coherent(&qedf->pdev->dev, | |
be086e7c | 278 | QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge), |
61d8658b DC |
279 | &bdt_info->bd_tbl_dma, GFP_KERNEL); |
280 | if (!bdt_info->bd_tbl) { | |
be086e7c MY |
281 | QEDF_WARN(&(qedf->dbg_ctx), |
282 | "Failed to alloc bdt_tbl[%d].\n", i); | |
61d8658b DC |
283 | goto mem_err; |
284 | } | |
285 | } | |
286 | atomic_set(&cmgr->free_list_cnt, num_ios); | |
287 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
288 | "cmgr->free_list_cnt=%d.\n", | |
289 | atomic_read(&cmgr->free_list_cnt)); | |
290 | ||
291 | return cmgr; | |
292 | ||
293 | mem_err: | |
294 | qedf_cmd_mgr_free(cmgr); | |
295 | return NULL; | |
296 | } | |
297 | ||
298 | struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport, u8 cmd_type) | |
299 | { | |
300 | struct qedf_ctx *qedf = fcport->qedf; | |
301 | struct qedf_cmd_mgr *cmd_mgr = qedf->cmd_mgr; | |
302 | struct qedf_ioreq *io_req = NULL; | |
303 | struct io_bdt *bd_tbl; | |
304 | u16 xid; | |
305 | uint32_t free_sqes; | |
306 | int i; | |
307 | unsigned long flags; | |
308 | ||
309 | free_sqes = atomic_read(&fcport->free_sqes); | |
310 | ||
311 | if (!free_sqes) { | |
312 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
313 | "Returning NULL, free_sqes=%d.\n ", | |
314 | free_sqes); | |
315 | goto out_failed; | |
316 | } | |
317 | ||
318 | /* Limit the number of outstanding R/W tasks */ | |
319 | if ((atomic_read(&fcport->num_active_ios) >= | |
320 | NUM_RW_TASKS_PER_CONNECTION)) { | |
321 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
322 | "Returning NULL, num_active_ios=%d.\n", | |
323 | atomic_read(&fcport->num_active_ios)); | |
324 | goto out_failed; | |
325 | } | |
326 | ||
327 | /* Limit global TIDs certain tasks */ | |
328 | if (atomic_read(&cmd_mgr->free_list_cnt) <= GBL_RSVD_TASKS) { | |
329 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
330 | "Returning NULL, free_list_cnt=%d.\n", | |
331 | atomic_read(&cmd_mgr->free_list_cnt)); | |
332 | goto out_failed; | |
333 | } | |
334 | ||
335 | spin_lock_irqsave(&cmd_mgr->lock, flags); | |
336 | for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { | |
337 | io_req = &cmd_mgr->cmds[cmd_mgr->idx]; | |
338 | cmd_mgr->idx++; | |
339 | if (cmd_mgr->idx == FCOE_PARAMS_NUM_TASKS) | |
340 | cmd_mgr->idx = 0; | |
341 | ||
342 | /* Check to make sure command was previously freed */ | |
5d5e5565 | 343 | if (!io_req->alloc) |
61d8658b DC |
344 | break; |
345 | } | |
346 | ||
347 | if (i == FCOE_PARAMS_NUM_TASKS) { | |
348 | spin_unlock_irqrestore(&cmd_mgr->lock, flags); | |
349 | goto out_failed; | |
350 | } | |
351 | ||
feac47f5 SS |
352 | if (test_bit(QEDF_CMD_DIRTY, &io_req->flags)) |
353 | QEDF_ERR(&qedf->dbg_ctx, | |
354 | "io_req found to be dirty ox_id = 0x%x.\n", | |
355 | io_req->xid); | |
356 | ||
5d5e5565 SS |
357 | /* Clear any flags now that we've reallocated the xid */ |
358 | io_req->flags = 0; | |
359 | io_req->alloc = 1; | |
61d8658b DC |
360 | spin_unlock_irqrestore(&cmd_mgr->lock, flags); |
361 | ||
362 | atomic_inc(&fcport->num_active_ios); | |
363 | atomic_dec(&fcport->free_sqes); | |
364 | xid = io_req->xid; | |
365 | atomic_dec(&cmd_mgr->free_list_cnt); | |
366 | ||
367 | io_req->cmd_mgr = cmd_mgr; | |
368 | io_req->fcport = fcport; | |
369 | ||
5d5e5565 SS |
370 | /* Clear any stale sc_cmd back pointer */ |
371 | io_req->sc_cmd = NULL; | |
372 | io_req->lun = -1; | |
373 | ||
61d8658b | 374 | /* Hold the io_req against deletion */ |
faea5719 SS |
375 | kref_init(&io_req->refcount); /* ID: 001 */ |
376 | atomic_set(&io_req->state, QEDFC_CMD_ST_IO_ACTIVE); | |
61d8658b DC |
377 | |
378 | /* Bind io_bdt for this io_req */ | |
379 | /* Have a static link between io_req and io_bdt_pool */ | |
380 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; | |
381 | if (bd_tbl == NULL) { | |
382 | QEDF_ERR(&(qedf->dbg_ctx), "bd_tbl is NULL, xid=%x.\n", xid); | |
383 | kref_put(&io_req->refcount, qedf_release_cmd); | |
384 | goto out_failed; | |
385 | } | |
386 | bd_tbl->io_req = io_req; | |
387 | io_req->cmd_type = cmd_type; | |
be086e7c | 388 | io_req->tm_flags = 0; |
61d8658b DC |
389 | |
390 | /* Reset sequence offset data */ | |
391 | io_req->rx_buf_off = 0; | |
392 | io_req->tx_buf_off = 0; | |
393 | io_req->rx_id = 0xffff; /* No OX_ID */ | |
394 | ||
395 | return io_req; | |
396 | ||
397 | out_failed: | |
398 | /* Record failure for stats and return NULL to caller */ | |
399 | qedf->alloc_failures++; | |
400 | return NULL; | |
401 | } | |
402 | ||
403 | static void qedf_free_mp_resc(struct qedf_ioreq *io_req) | |
404 | { | |
405 | struct qedf_mp_req *mp_req = &(io_req->mp_req); | |
406 | struct qedf_ctx *qedf = io_req->fcport->qedf; | |
be086e7c | 407 | uint64_t sz = sizeof(struct scsi_sge); |
61d8658b DC |
408 | |
409 | /* clear tm flags */ | |
61d8658b DC |
410 | if (mp_req->mp_req_bd) { |
411 | dma_free_coherent(&qedf->pdev->dev, sz, | |
412 | mp_req->mp_req_bd, mp_req->mp_req_bd_dma); | |
413 | mp_req->mp_req_bd = NULL; | |
414 | } | |
415 | if (mp_req->mp_resp_bd) { | |
416 | dma_free_coherent(&qedf->pdev->dev, sz, | |
417 | mp_req->mp_resp_bd, mp_req->mp_resp_bd_dma); | |
418 | mp_req->mp_resp_bd = NULL; | |
419 | } | |
420 | if (mp_req->req_buf) { | |
421 | dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, | |
422 | mp_req->req_buf, mp_req->req_buf_dma); | |
423 | mp_req->req_buf = NULL; | |
424 | } | |
425 | if (mp_req->resp_buf) { | |
426 | dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, | |
427 | mp_req->resp_buf, mp_req->resp_buf_dma); | |
428 | mp_req->resp_buf = NULL; | |
429 | } | |
430 | } | |
431 | ||
432 | void qedf_release_cmd(struct kref *ref) | |
433 | { | |
434 | struct qedf_ioreq *io_req = | |
435 | container_of(ref, struct qedf_ioreq, refcount); | |
436 | struct qedf_cmd_mgr *cmd_mgr = io_req->cmd_mgr; | |
437 | struct qedf_rport *fcport = io_req->fcport; | |
5d5e5565 SS |
438 | unsigned long flags; |
439 | ||
e82e6ff7 SK |
440 | if (io_req->cmd_type == QEDF_SCSI_CMD) { |
441 | QEDF_WARN(&fcport->qedf->dbg_ctx, | |
442 | "Cmd released called without scsi_done called, io_req %p xid=0x%x.\n", | |
443 | io_req, io_req->xid); | |
5d5e5565 | 444 | WARN_ON(io_req->sc_cmd); |
e82e6ff7 | 445 | } |
61d8658b DC |
446 | |
447 | if (io_req->cmd_type == QEDF_ELS || | |
448 | io_req->cmd_type == QEDF_TASK_MGMT_CMD) | |
449 | qedf_free_mp_resc(io_req); | |
450 | ||
451 | atomic_inc(&cmd_mgr->free_list_cnt); | |
452 | atomic_dec(&fcport->num_active_ios); | |
faea5719 | 453 | atomic_set(&io_req->state, QEDF_CMD_ST_INACTIVE); |
e82e6ff7 | 454 | if (atomic_read(&fcport->num_active_ios) < 0) { |
61d8658b | 455 | QEDF_WARN(&(fcport->qedf->dbg_ctx), "active_ios < 0.\n"); |
e82e6ff7 SK |
456 | WARN_ON(1); |
457 | } | |
61d8658b DC |
458 | |
459 | /* Increment task retry identifier now that the request is released */ | |
460 | io_req->task_retry_identifier++; | |
5d5e5565 | 461 | io_req->fcport = NULL; |
61d8658b | 462 | |
5d5e5565 SS |
463 | clear_bit(QEDF_CMD_DIRTY, &io_req->flags); |
464 | io_req->cpu = 0; | |
465 | spin_lock_irqsave(&cmd_mgr->lock, flags); | |
466 | io_req->fcport = NULL; | |
467 | io_req->alloc = 0; | |
468 | spin_unlock_irqrestore(&cmd_mgr->lock, flags); | |
61d8658b DC |
469 | } |
470 | ||
61d8658b DC |
471 | static int qedf_map_sg(struct qedf_ioreq *io_req) |
472 | { | |
473 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
474 | struct Scsi_Host *host = sc->device->host; | |
475 | struct fc_lport *lport = shost_priv(host); | |
476 | struct qedf_ctx *qedf = lport_priv(lport); | |
be086e7c | 477 | struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; |
61d8658b DC |
478 | struct scatterlist *sg; |
479 | int byte_count = 0; | |
480 | int sg_count = 0; | |
481 | int bd_count = 0; | |
3e2c11b3 | 482 | u32 sg_len; |
50efc51c | 483 | u64 addr; |
3e2c11b3 | 484 | int i = 0; |
61d8658b DC |
485 | |
486 | sg_count = dma_map_sg(&qedf->pdev->dev, scsi_sglist(sc), | |
487 | scsi_sg_count(sc), sc->sc_data_direction); | |
61d8658b DC |
488 | sg = scsi_sglist(sc); |
489 | ||
3e2c11b3 | 490 | io_req->sge_type = QEDF_IOREQ_UNKNOWN_SGE; |
61d8658b | 491 | |
3e2c11b3 CD |
492 | if (sg_count <= 8 || io_req->io_req_flags == QEDF_READ) |
493 | io_req->sge_type = QEDF_IOREQ_FAST_SGE; | |
61d8658b DC |
494 | |
495 | scsi_for_each_sg(sc, sg, sg_count, i) { | |
3e2c11b3 | 496 | sg_len = (u32)sg_dma_len(sg); |
61d8658b | 497 | addr = (u64)sg_dma_address(sg); |
61d8658b | 498 | |
61d8658b | 499 | /* |
50efc51c | 500 | * Intermediate s/g element so check if start address |
3e2c11b3 CD |
501 | * is page aligned. Only required for writes and only if the |
502 | * number of scatter/gather elements is 8 or more. | |
61d8658b | 503 | */ |
3e2c11b3 CD |
504 | if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE && (i) && |
505 | (i != (sg_count - 1)) && sg_len < QEDF_PAGE_SIZE) | |
506 | io_req->sge_type = QEDF_IOREQ_SLOW_SGE; | |
61d8658b | 507 | |
3e2c11b3 CD |
508 | bd[bd_count].sge_addr.lo = cpu_to_le32(U64_LO(addr)); |
509 | bd[bd_count].sge_addr.hi = cpu_to_le32(U64_HI(addr)); | |
510 | bd[bd_count].sge_len = cpu_to_le32(sg_len); | |
61d8658b | 511 | |
3e2c11b3 | 512 | bd_count++; |
61d8658b DC |
513 | byte_count += sg_len; |
514 | } | |
515 | ||
3e2c11b3 CD |
516 | /* To catch a case where FAST and SLOW nothing is set, set FAST */ |
517 | if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE) | |
518 | io_req->sge_type = QEDF_IOREQ_FAST_SGE; | |
519 | ||
61d8658b DC |
520 | if (byte_count != scsi_bufflen(sc)) |
521 | QEDF_ERR(&(qedf->dbg_ctx), "byte_count = %d != " | |
522 | "scsi_bufflen = %d, task_id = 0x%x.\n", byte_count, | |
523 | scsi_bufflen(sc), io_req->xid); | |
524 | ||
525 | return bd_count; | |
526 | } | |
527 | ||
528 | static int qedf_build_bd_list_from_sg(struct qedf_ioreq *io_req) | |
529 | { | |
530 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
be086e7c | 531 | struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; |
61d8658b DC |
532 | int bd_count; |
533 | ||
534 | if (scsi_sg_count(sc)) { | |
535 | bd_count = qedf_map_sg(io_req); | |
536 | if (bd_count == 0) | |
537 | return -ENOMEM; | |
538 | } else { | |
539 | bd_count = 0; | |
540 | bd[0].sge_addr.lo = bd[0].sge_addr.hi = 0; | |
be086e7c | 541 | bd[0].sge_len = 0; |
61d8658b DC |
542 | } |
543 | io_req->bd_tbl->bd_valid = bd_count; | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req, | |
ade4fb94 | 549 | struct fcp_cmnd *fcp_cmnd) |
61d8658b DC |
550 | { |
551 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
552 | ||
553 | /* fcp_cmnd is 32 bytes */ | |
554 | memset(fcp_cmnd, 0, FCP_CMND_LEN); | |
555 | ||
556 | /* 8 bytes: SCSI LUN info */ | |
ade4fb94 HR |
557 | if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) |
558 | int_to_scsilun(io_req->tm_lun, | |
559 | (struct scsi_lun *)&fcp_cmnd->fc_lun); | |
560 | else | |
561 | int_to_scsilun(sc_cmd->device->lun, | |
562 | (struct scsi_lun *)&fcp_cmnd->fc_lun); | |
61d8658b DC |
563 | |
564 | /* 4 bytes: flag info */ | |
565 | fcp_cmnd->fc_pri_ta = 0; | |
be086e7c | 566 | fcp_cmnd->fc_tm_flags = io_req->tm_flags; |
61d8658b DC |
567 | fcp_cmnd->fc_flags = io_req->io_req_flags; |
568 | fcp_cmnd->fc_cmdref = 0; | |
569 | ||
570 | /* Populate data direction */ | |
be086e7c | 571 | if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { |
61d8658b | 572 | fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; |
be086e7c MY |
573 | } else { |
574 | if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) | |
575 | fcp_cmnd->fc_flags |= FCP_CFL_WRDATA; | |
576 | else if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) | |
577 | fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; | |
578 | } | |
61d8658b DC |
579 | |
580 | fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; | |
581 | ||
582 | /* 16 bytes: CDB information */ | |
be086e7c MY |
583 | if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) |
584 | memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); | |
61d8658b DC |
585 | |
586 | /* 4 bytes: FCP data length */ | |
587 | fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); | |
61d8658b DC |
588 | } |
589 | ||
590 | static void qedf_init_task(struct qedf_rport *fcport, struct fc_lport *lport, | |
fb09a1ed | 591 | struct qedf_ioreq *io_req, struct fcoe_task_context *task_ctx, |
be086e7c | 592 | struct fcoe_wqe *sqe) |
61d8658b DC |
593 | { |
594 | enum fcoe_task_type task_type; | |
595 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
596 | struct io_bdt *bd_tbl = io_req->bd_tbl; | |
be086e7c | 597 | u8 fcp_cmnd[32]; |
61d8658b | 598 | u32 tmp_fcp_cmnd[8]; |
be086e7c | 599 | int bd_count = 0; |
61d8658b DC |
600 | struct qedf_ctx *qedf = fcport->qedf; |
601 | uint16_t cq_idx = smp_processor_id() % qedf->num_queues; | |
be086e7c MY |
602 | struct regpair sense_data_buffer_phys_addr; |
603 | u32 tx_io_size = 0; | |
604 | u32 rx_io_size = 0; | |
605 | int i, cnt; | |
61d8658b | 606 | |
be086e7c | 607 | /* Note init_initiator_rw_fcoe_task memsets the task context */ |
61d8658b | 608 | io_req->task = task_ctx; |
fb09a1ed | 609 | memset(task_ctx, 0, sizeof(struct fcoe_task_context)); |
be086e7c MY |
610 | memset(io_req->task_params, 0, sizeof(struct fcoe_task_params)); |
611 | memset(io_req->sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); | |
61d8658b | 612 | |
be086e7c MY |
613 | /* Set task type bassed on DMA directio of command */ |
614 | if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { | |
61d8658b | 615 | task_type = FCOE_TASK_TYPE_READ_INITIATOR; |
61d8658b | 616 | } else { |
be086e7c MY |
617 | if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { |
618 | task_type = FCOE_TASK_TYPE_WRITE_INITIATOR; | |
619 | tx_io_size = io_req->data_xfer_len; | |
61d8658b | 620 | } else { |
be086e7c MY |
621 | task_type = FCOE_TASK_TYPE_READ_INITIATOR; |
622 | rx_io_size = io_req->data_xfer_len; | |
61d8658b | 623 | } |
61d8658b DC |
624 | } |
625 | ||
be086e7c MY |
626 | /* Setup the fields for fcoe_task_params */ |
627 | io_req->task_params->context = task_ctx; | |
628 | io_req->task_params->sqe = sqe; | |
629 | io_req->task_params->task_type = task_type; | |
630 | io_req->task_params->tx_io_size = tx_io_size; | |
631 | io_req->task_params->rx_io_size = rx_io_size; | |
632 | io_req->task_params->conn_cid = fcport->fw_cid; | |
633 | io_req->task_params->itid = io_req->xid; | |
634 | io_req->task_params->cq_rss_number = cq_idx; | |
635 | io_req->task_params->is_tape_device = fcport->dev_type; | |
636 | ||
637 | /* Fill in information for scatter/gather list */ | |
638 | if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) { | |
639 | bd_count = bd_tbl->bd_valid; | |
640 | io_req->sgl_task_params->sgl = bd_tbl->bd_tbl; | |
641 | io_req->sgl_task_params->sgl_phys_addr.lo = | |
642 | U64_LO(bd_tbl->bd_tbl_dma); | |
643 | io_req->sgl_task_params->sgl_phys_addr.hi = | |
644 | U64_HI(bd_tbl->bd_tbl_dma); | |
645 | io_req->sgl_task_params->num_sges = bd_count; | |
646 | io_req->sgl_task_params->total_buffer_size = | |
647 | scsi_bufflen(io_req->sc_cmd); | |
3e2c11b3 CD |
648 | if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) |
649 | io_req->sgl_task_params->small_mid_sge = 1; | |
650 | else | |
651 | io_req->sgl_task_params->small_mid_sge = 0; | |
be086e7c MY |
652 | } |
653 | ||
654 | /* Fill in physical address of sense buffer */ | |
655 | sense_data_buffer_phys_addr.lo = U64_LO(io_req->sense_buffer_dma); | |
656 | sense_data_buffer_phys_addr.hi = U64_HI(io_req->sense_buffer_dma); | |
657 | ||
61d8658b | 658 | /* fill FCP_CMND IU */ |
be086e7c | 659 | qedf_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tmp_fcp_cmnd); |
61d8658b DC |
660 | |
661 | /* Swap fcp_cmnd since FC is big endian */ | |
662 | cnt = sizeof(struct fcp_cmnd) / sizeof(u32); | |
61d8658b | 663 | for (i = 0; i < cnt; i++) { |
be086e7c MY |
664 | tmp_fcp_cmnd[i] = cpu_to_be32(tmp_fcp_cmnd[i]); |
665 | } | |
666 | memcpy(fcp_cmnd, tmp_fcp_cmnd, sizeof(struct fcp_cmnd)); | |
667 | ||
668 | init_initiator_rw_fcoe_task(io_req->task_params, | |
669 | io_req->sgl_task_params, | |
670 | sense_data_buffer_phys_addr, | |
671 | io_req->task_retry_identifier, fcp_cmnd); | |
672 | ||
673 | /* Increment SGL type counters */ | |
3e2c11b3 | 674 | if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) |
be086e7c | 675 | qedf->slow_sge_ios++; |
3e2c11b3 | 676 | else |
be086e7c | 677 | qedf->fast_sge_ios++; |
61d8658b DC |
678 | } |
679 | ||
680 | void qedf_init_mp_task(struct qedf_ioreq *io_req, | |
fb09a1ed | 681 | struct fcoe_task_context *task_ctx, struct fcoe_wqe *sqe) |
61d8658b DC |
682 | { |
683 | struct qedf_mp_req *mp_req = &(io_req->mp_req); | |
684 | struct qedf_rport *fcport = io_req->fcport; | |
685 | struct qedf_ctx *qedf = io_req->fcport->qedf; | |
686 | struct fc_frame_header *fc_hdr; | |
be086e7c MY |
687 | struct fcoe_tx_mid_path_params task_fc_hdr; |
688 | struct scsi_sgl_task_params tx_sgl_task_params; | |
689 | struct scsi_sgl_task_params rx_sgl_task_params; | |
61d8658b | 690 | |
be086e7c MY |
691 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, |
692 | "Initializing MP task for cmd_type=%d\n", | |
693 | io_req->cmd_type); | |
61d8658b DC |
694 | |
695 | qedf->control_requests++; | |
696 | ||
be086e7c MY |
697 | memset(&tx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); |
698 | memset(&rx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); | |
fb09a1ed | 699 | memset(task_ctx, 0, sizeof(struct fcoe_task_context)); |
be086e7c | 700 | memset(&task_fc_hdr, 0, sizeof(struct fcoe_tx_mid_path_params)); |
61d8658b DC |
701 | |
702 | /* Setup the task from io_req for easy reference */ | |
703 | io_req->task = task_ctx; | |
704 | ||
be086e7c MY |
705 | /* Setup the fields for fcoe_task_params */ |
706 | io_req->task_params->context = task_ctx; | |
707 | io_req->task_params->sqe = sqe; | |
708 | io_req->task_params->task_type = FCOE_TASK_TYPE_MIDPATH; | |
709 | io_req->task_params->tx_io_size = io_req->data_xfer_len; | |
710 | /* rx_io_size tells the f/w how large a response buffer we have */ | |
711 | io_req->task_params->rx_io_size = PAGE_SIZE; | |
712 | io_req->task_params->conn_cid = fcport->fw_cid; | |
713 | io_req->task_params->itid = io_req->xid; | |
714 | /* Return middle path commands on CQ 0 */ | |
715 | io_req->task_params->cq_rss_number = 0; | |
716 | io_req->task_params->is_tape_device = fcport->dev_type; | |
717 | ||
718 | fc_hdr = &(mp_req->req_fc_hdr); | |
719 | /* Set OX_ID and RX_ID based on driver task id */ | |
720 | fc_hdr->fh_ox_id = io_req->xid; | |
721 | fc_hdr->fh_rx_id = htons(0xffff); | |
722 | ||
723 | /* Set up FC header information */ | |
724 | task_fc_hdr.parameter = fc_hdr->fh_parm_offset; | |
725 | task_fc_hdr.r_ctl = fc_hdr->fh_r_ctl; | |
726 | task_fc_hdr.type = fc_hdr->fh_type; | |
727 | task_fc_hdr.cs_ctl = fc_hdr->fh_cs_ctl; | |
728 | task_fc_hdr.df_ctl = fc_hdr->fh_df_ctl; | |
729 | task_fc_hdr.rx_id = fc_hdr->fh_rx_id; | |
730 | task_fc_hdr.ox_id = fc_hdr->fh_ox_id; | |
731 | ||
732 | /* Set up s/g list parameters for request buffer */ | |
733 | tx_sgl_task_params.sgl = mp_req->mp_req_bd; | |
734 | tx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_req_bd_dma); | |
735 | tx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_req_bd_dma); | |
736 | tx_sgl_task_params.num_sges = 1; | |
737 | /* Set PAGE_SIZE for now since sg element is that size ??? */ | |
738 | tx_sgl_task_params.total_buffer_size = io_req->data_xfer_len; | |
739 | tx_sgl_task_params.small_mid_sge = 0; | |
740 | ||
741 | /* Set up s/g list parameters for request buffer */ | |
742 | rx_sgl_task_params.sgl = mp_req->mp_resp_bd; | |
743 | rx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_resp_bd_dma); | |
744 | rx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_resp_bd_dma); | |
745 | rx_sgl_task_params.num_sges = 1; | |
746 | /* Set PAGE_SIZE for now since sg element is that size ??? */ | |
747 | rx_sgl_task_params.total_buffer_size = PAGE_SIZE; | |
748 | rx_sgl_task_params.small_mid_sge = 0; | |
61d8658b | 749 | |
61d8658b | 750 | |
be086e7c MY |
751 | /* |
752 | * Last arg is 0 as previous code did not set that we wanted the | |
753 | * fc header information. | |
754 | */ | |
755 | init_initiator_midpath_unsolicited_fcoe_task(io_req->task_params, | |
756 | &task_fc_hdr, | |
757 | &tx_sgl_task_params, | |
758 | &rx_sgl_task_params, 0); | |
61d8658b DC |
759 | } |
760 | ||
be086e7c MY |
761 | /* Presumed that fcport->rport_lock is held */ |
762 | u16 qedf_get_sqe_idx(struct qedf_rport *fcport) | |
61d8658b | 763 | { |
61d8658b | 764 | uint16_t total_sqe = (fcport->sq_mem_size)/(sizeof(struct fcoe_wqe)); |
be086e7c | 765 | u16 rval; |
61d8658b | 766 | |
be086e7c | 767 | rval = fcport->sq_prod_idx; |
61d8658b | 768 | |
be086e7c | 769 | /* Adjust ring index */ |
61d8658b DC |
770 | fcport->sq_prod_idx++; |
771 | fcport->fw_sq_prod_idx++; | |
772 | if (fcport->sq_prod_idx == total_sqe) | |
773 | fcport->sq_prod_idx = 0; | |
774 | ||
be086e7c | 775 | return rval; |
61d8658b DC |
776 | } |
777 | ||
778 | void qedf_ring_doorbell(struct qedf_rport *fcport) | |
779 | { | |
780 | struct fcoe_db_data dbell = { 0 }; | |
781 | ||
782 | dbell.agg_flags = 0; | |
783 | ||
784 | dbell.params |= DB_DEST_XCM << FCOE_DB_DATA_DEST_SHIFT; | |
785 | dbell.params |= DB_AGG_CMD_SET << FCOE_DB_DATA_AGG_CMD_SHIFT; | |
786 | dbell.params |= DQ_XCM_FCOE_SQ_PROD_CMD << | |
787 | FCOE_DB_DATA_AGG_VAL_SEL_SHIFT; | |
788 | ||
789 | dbell.sq_prod = fcport->fw_sq_prod_idx; | |
90ccf757 AV |
790 | /* wmb makes sure that the BDs data is updated before updating the |
791 | * producer, otherwise FW may read old data from the BDs. | |
792 | */ | |
793 | wmb(); | |
794 | barrier(); | |
61d8658b | 795 | writel(*(u32 *)&dbell, fcport->p_doorbell); |
90ccf757 AV |
796 | /* |
797 | * Fence required to flush the write combined buffer, since another | |
798 | * CPU may write to the same doorbell address and data may be lost | |
799 | * due to relaxed order nature of write combined bar. | |
800 | */ | |
61d8658b | 801 | wmb(); |
61d8658b DC |
802 | } |
803 | ||
804 | static void qedf_trace_io(struct qedf_rport *fcport, struct qedf_ioreq *io_req, | |
805 | int8_t direction) | |
806 | { | |
807 | struct qedf_ctx *qedf = fcport->qedf; | |
808 | struct qedf_io_log *io_log; | |
809 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
810 | unsigned long flags; | |
61d8658b DC |
811 | |
812 | spin_lock_irqsave(&qedf->io_trace_lock, flags); | |
813 | ||
814 | io_log = &qedf->io_trace_buf[qedf->io_trace_idx]; | |
815 | io_log->direction = direction; | |
816 | io_log->task_id = io_req->xid; | |
817 | io_log->port_id = fcport->rdata->ids.port_id; | |
818 | io_log->lun = sc_cmd->device->lun; | |
fc65df48 | 819 | io_log->op = sc_cmd->cmnd[0]; |
61d8658b DC |
820 | io_log->lba[0] = sc_cmd->cmnd[2]; |
821 | io_log->lba[1] = sc_cmd->cmnd[3]; | |
822 | io_log->lba[2] = sc_cmd->cmnd[4]; | |
823 | io_log->lba[3] = sc_cmd->cmnd[5]; | |
824 | io_log->bufflen = scsi_bufflen(sc_cmd); | |
825 | io_log->sg_count = scsi_sg_count(sc_cmd); | |
826 | io_log->result = sc_cmd->result; | |
827 | io_log->jiffies = jiffies; | |
1afca6b5 | 828 | io_log->refcount = kref_read(&io_req->refcount); |
61d8658b DC |
829 | |
830 | if (direction == QEDF_IO_TRACE_REQ) { | |
831 | /* For requests we only care abot the submission CPU */ | |
832 | io_log->req_cpu = io_req->cpu; | |
833 | io_log->int_cpu = 0; | |
834 | io_log->rsp_cpu = 0; | |
835 | } else if (direction == QEDF_IO_TRACE_RSP) { | |
836 | io_log->req_cpu = io_req->cpu; | |
837 | io_log->int_cpu = io_req->int_cpu; | |
838 | io_log->rsp_cpu = smp_processor_id(); | |
839 | } | |
840 | ||
841 | io_log->sge_type = io_req->sge_type; | |
842 | ||
843 | qedf->io_trace_idx++; | |
844 | if (qedf->io_trace_idx == QEDF_IO_TRACE_SIZE) | |
845 | qedf->io_trace_idx = 0; | |
846 | ||
847 | spin_unlock_irqrestore(&qedf->io_trace_lock, flags); | |
848 | } | |
849 | ||
850 | int qedf_post_io_req(struct qedf_rport *fcport, struct qedf_ioreq *io_req) | |
851 | { | |
852 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
853 | struct Scsi_Host *host = sc_cmd->device->host; | |
854 | struct fc_lport *lport = shost_priv(host); | |
855 | struct qedf_ctx *qedf = lport_priv(lport); | |
fb09a1ed | 856 | struct fcoe_task_context *task_ctx; |
61d8658b | 857 | u16 xid; |
be086e7c MY |
858 | struct fcoe_wqe *sqe; |
859 | u16 sqe_idx; | |
61d8658b DC |
860 | |
861 | /* Initialize rest of io_req fileds */ | |
862 | io_req->data_xfer_len = scsi_bufflen(sc_cmd); | |
a33e7925 | 863 | qedf_priv(sc_cmd)->io_req = io_req; |
3e2c11b3 | 864 | io_req->sge_type = QEDF_IOREQ_FAST_SGE; /* Assume fast SGL by default */ |
61d8658b DC |
865 | |
866 | /* Record which cpu this request is associated with */ | |
867 | io_req->cpu = smp_processor_id(); | |
868 | ||
869 | if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { | |
61d8658b DC |
870 | io_req->io_req_flags = QEDF_READ; |
871 | qedf->input_requests++; | |
872 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { | |
61d8658b DC |
873 | io_req->io_req_flags = QEDF_WRITE; |
874 | qedf->output_requests++; | |
875 | } else { | |
876 | io_req->io_req_flags = 0; | |
877 | qedf->control_requests++; | |
878 | } | |
879 | ||
880 | xid = io_req->xid; | |
881 | ||
882 | /* Build buffer descriptor list for firmware from sg list */ | |
883 | if (qedf_build_bd_list_from_sg(io_req)) { | |
884 | QEDF_ERR(&(qedf->dbg_ctx), "BD list creation failed.\n"); | |
5d5e5565 SS |
885 | /* Release cmd will release io_req, but sc_cmd is assigned */ |
886 | io_req->sc_cmd = NULL; | |
61d8658b DC |
887 | kref_put(&io_req->refcount, qedf_release_cmd); |
888 | return -EAGAIN; | |
889 | } | |
890 | ||
5d5e5565 SS |
891 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || |
892 | test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { | |
be086e7c | 893 | QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n"); |
5d5e5565 SS |
894 | /* Release cmd will release io_req, but sc_cmd is assigned */ |
895 | io_req->sc_cmd = NULL; | |
be086e7c | 896 | kref_put(&io_req->refcount, qedf_release_cmd); |
c5e06ba2 | 897 | return -EINVAL; |
be086e7c MY |
898 | } |
899 | ||
379ad771 | 900 | /* Record LUN number for later use if we need them */ |
5d5e5565 SS |
901 | io_req->lun = (int)sc_cmd->device->lun; |
902 | ||
be086e7c MY |
903 | /* Obtain free SQE */ |
904 | sqe_idx = qedf_get_sqe_idx(fcport); | |
905 | sqe = &fcport->sq[sqe_idx]; | |
906 | memset(sqe, 0, sizeof(struct fcoe_wqe)); | |
907 | ||
61d8658b DC |
908 | /* Get the task context */ |
909 | task_ctx = qedf_get_task_mem(&qedf->tasks, xid); | |
910 | if (!task_ctx) { | |
911 | QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n", | |
912 | xid); | |
5d5e5565 SS |
913 | /* Release cmd will release io_req, but sc_cmd is assigned */ |
914 | io_req->sc_cmd = NULL; | |
61d8658b DC |
915 | kref_put(&io_req->refcount, qedf_release_cmd); |
916 | return -EINVAL; | |
917 | } | |
918 | ||
be086e7c | 919 | qedf_init_task(fcport, lport, io_req, task_ctx, sqe); |
61d8658b DC |
920 | |
921 | /* Ring doorbell */ | |
922 | qedf_ring_doorbell(fcport); | |
923 | ||
5d5e5565 SS |
924 | /* Set that command is with the firmware now */ |
925 | set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); | |
926 | ||
61d8658b DC |
927 | if (qedf_io_tracing && io_req->sc_cmd) |
928 | qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_REQ); | |
929 | ||
930 | return false; | |
931 | } | |
932 | ||
933 | int | |
934 | qedf_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd) | |
935 | { | |
936 | struct fc_lport *lport = shost_priv(host); | |
937 | struct qedf_ctx *qedf = lport_priv(lport); | |
938 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); | |
939 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
8d6febb0 | 940 | struct qedf_rport *fcport; |
61d8658b DC |
941 | struct qedf_ioreq *io_req; |
942 | int rc = 0; | |
943 | int rval; | |
944 | unsigned long flags = 0; | |
3e2c11b3 | 945 | int num_sgs = 0; |
61d8658b | 946 | |
3e2c11b3 CD |
947 | num_sgs = scsi_sg_count(sc_cmd); |
948 | if (scsi_sg_count(sc_cmd) > QEDF_MAX_BDS_PER_CMD) { | |
949 | QEDF_ERR(&qedf->dbg_ctx, | |
950 | "Number of SG elements %d exceeds what hardware limitation of %d.\n", | |
951 | num_sgs, QEDF_MAX_BDS_PER_CMD); | |
952 | sc_cmd->result = DID_ERROR; | |
ef697683 | 953 | scsi_done(sc_cmd); |
3e2c11b3 CD |
954 | return 0; |
955 | } | |
61d8658b DC |
956 | |
957 | if (test_bit(QEDF_UNLOADING, &qedf->flags) || | |
958 | test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { | |
e82e6ff7 SK |
959 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
960 | "Returning DNC as unloading or stop io, flags 0x%lx.\n", | |
961 | qedf->flags); | |
61d8658b | 962 | sc_cmd->result = DID_NO_CONNECT << 16; |
ef697683 | 963 | scsi_done(sc_cmd); |
61d8658b DC |
964 | return 0; |
965 | } | |
966 | ||
a8f192bc CD |
967 | if (!qedf->pdev->msix_enabled) { |
968 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
969 | "Completing sc_cmd=%p DID_NO_CONNECT as MSI-X is not enabled.\n", | |
970 | sc_cmd); | |
971 | sc_cmd->result = DID_NO_CONNECT << 16; | |
ef697683 | 972 | scsi_done(sc_cmd); |
a8f192bc CD |
973 | return 0; |
974 | } | |
975 | ||
61d8658b DC |
976 | rval = fc_remote_port_chkready(rport); |
977 | if (rval) { | |
e82e6ff7 SK |
978 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
979 | "fc_remote_port_chkready failed=0x%x for port_id=0x%06x.\n", | |
980 | rval, rport->port_id); | |
61d8658b | 981 | sc_cmd->result = rval; |
ef697683 | 982 | scsi_done(sc_cmd); |
61d8658b DC |
983 | return 0; |
984 | } | |
985 | ||
986 | /* Retry command if we are doing a qed drain operation */ | |
987 | if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { | |
e82e6ff7 | 988 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Drain active.\n"); |
61d8658b DC |
989 | rc = SCSI_MLQUEUE_HOST_BUSY; |
990 | goto exit_qcmd; | |
991 | } | |
992 | ||
993 | if (lport->state != LPORT_ST_READY || | |
994 | atomic_read(&qedf->link_state) != QEDF_LINK_UP) { | |
e82e6ff7 | 995 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Link down.\n"); |
61d8658b DC |
996 | rc = SCSI_MLQUEUE_HOST_BUSY; |
997 | goto exit_qcmd; | |
998 | } | |
999 | ||
1000 | /* rport and tgt are allocated together, so tgt should be non-NULL */ | |
1001 | fcport = (struct qedf_rport *)&rp[1]; | |
1002 | ||
ff543e28 SS |
1003 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || |
1004 | test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { | |
61d8658b DC |
1005 | /* |
1006 | * Session is not offloaded yet. Let SCSI-ml retry | |
1007 | * the command. | |
1008 | */ | |
1009 | rc = SCSI_MLQUEUE_TARGET_BUSY; | |
1010 | goto exit_qcmd; | |
1011 | } | |
5d5e5565 SS |
1012 | |
1013 | atomic_inc(&fcport->ios_to_queue); | |
1014 | ||
61d8658b | 1015 | if (fcport->retry_delay_timestamp) { |
334b4f98 JH |
1016 | /* Take fcport->rport_lock for resetting the delay_timestamp */ |
1017 | spin_lock_irqsave(&fcport->rport_lock, flags); | |
61d8658b DC |
1018 | if (time_after(jiffies, fcport->retry_delay_timestamp)) { |
1019 | fcport->retry_delay_timestamp = 0; | |
1020 | } else { | |
334b4f98 | 1021 | spin_unlock_irqrestore(&fcport->rport_lock, flags); |
61d8658b DC |
1022 | /* If retry_delay timer is active, flow off the ML */ |
1023 | rc = SCSI_MLQUEUE_TARGET_BUSY; | |
5d5e5565 | 1024 | atomic_dec(&fcport->ios_to_queue); |
61d8658b DC |
1025 | goto exit_qcmd; |
1026 | } | |
334b4f98 | 1027 | spin_unlock_irqrestore(&fcport->rport_lock, flags); |
61d8658b DC |
1028 | } |
1029 | ||
1030 | io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD); | |
1031 | if (!io_req) { | |
1032 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
5d5e5565 | 1033 | atomic_dec(&fcport->ios_to_queue); |
61d8658b DC |
1034 | goto exit_qcmd; |
1035 | } | |
1036 | ||
1037 | io_req->sc_cmd = sc_cmd; | |
1038 | ||
1039 | /* Take fcport->rport_lock for posting to fcport send queue */ | |
1040 | spin_lock_irqsave(&fcport->rport_lock, flags); | |
1041 | if (qedf_post_io_req(fcport, io_req)) { | |
1042 | QEDF_WARN(&(qedf->dbg_ctx), "Unable to post io_req\n"); | |
1043 | /* Return SQE to pool */ | |
1044 | atomic_inc(&fcport->free_sqes); | |
1045 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
1046 | } | |
1047 | spin_unlock_irqrestore(&fcport->rport_lock, flags); | |
5d5e5565 | 1048 | atomic_dec(&fcport->ios_to_queue); |
61d8658b DC |
1049 | |
1050 | exit_qcmd: | |
1051 | return rc; | |
1052 | } | |
1053 | ||
1054 | static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req, | |
1055 | struct fcoe_cqe_rsp_info *fcp_rsp) | |
1056 | { | |
1057 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; | |
1058 | struct qedf_ctx *qedf = io_req->fcport->qedf; | |
1059 | u8 rsp_flags = fcp_rsp->rsp_flags.flags; | |
1060 | int fcp_sns_len = 0; | |
1061 | int fcp_rsp_len = 0; | |
1062 | uint8_t *rsp_info, *sense_data; | |
1063 | ||
1064 | io_req->fcp_status = FC_GOOD; | |
1065 | io_req->fcp_resid = 0; | |
1066 | if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | | |
1067 | FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) | |
1068 | io_req->fcp_resid = fcp_rsp->fcp_resid; | |
1069 | ||
1070 | io_req->scsi_comp_flags = rsp_flags; | |
a33e7925 | 1071 | io_req->cdb_status = fcp_rsp->scsi_status_code; |
61d8658b DC |
1072 | |
1073 | if (rsp_flags & | |
1074 | FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) | |
1075 | fcp_rsp_len = fcp_rsp->fcp_rsp_len; | |
1076 | ||
1077 | if (rsp_flags & | |
1078 | FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) | |
1079 | fcp_sns_len = fcp_rsp->fcp_sns_len; | |
1080 | ||
1081 | io_req->fcp_rsp_len = fcp_rsp_len; | |
1082 | io_req->fcp_sns_len = fcp_sns_len; | |
1083 | rsp_info = sense_data = io_req->sense_buffer; | |
1084 | ||
1085 | /* fetch fcp_rsp_code */ | |
1086 | if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { | |
1087 | /* Only for task management function */ | |
1088 | io_req->fcp_rsp_code = rsp_info[3]; | |
1089 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
1090 | "fcp_rsp_code = %d\n", io_req->fcp_rsp_code); | |
1091 | /* Adjust sense-data location. */ | |
1092 | sense_data += fcp_rsp_len; | |
1093 | } | |
1094 | ||
1095 | if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { | |
1096 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
1097 | "Truncating sense buffer\n"); | |
1098 | fcp_sns_len = SCSI_SENSE_BUFFERSIZE; | |
1099 | } | |
1100 | ||
16a61115 | 1101 | /* The sense buffer can be NULL for TMF commands */ |
ade4fb94 | 1102 | if (sc_cmd && sc_cmd->sense_buffer) { |
16a61115 DC |
1103 | memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
1104 | if (fcp_sns_len) | |
1105 | memcpy(sc_cmd->sense_buffer, sense_data, | |
1106 | fcp_sns_len); | |
1107 | } | |
61d8658b DC |
1108 | } |
1109 | ||
1110 | static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req) | |
1111 | { | |
1112 | struct scsi_cmnd *sc = io_req->sc_cmd; | |
1113 | ||
1114 | if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { | |
1115 | dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc), | |
1116 | scsi_sg_count(sc), sc->sc_data_direction); | |
1117 | io_req->bd_tbl->bd_valid = 0; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, | |
1122 | struct qedf_ioreq *io_req) | |
1123 | { | |
61d8658b DC |
1124 | struct scsi_cmnd *sc_cmd; |
1125 | struct fcoe_cqe_rsp_info *fcp_rsp; | |
1126 | struct qedf_rport *fcport; | |
1127 | int refcount; | |
1128 | u16 scope, qualifier = 0; | |
1129 | u8 fw_residual_flag = 0; | |
fedc173e JH |
1130 | unsigned long flags = 0; |
1131 | u16 chk_scope = 0; | |
61d8658b DC |
1132 | |
1133 | if (!io_req) | |
1134 | return; | |
1135 | if (!cqe) | |
1136 | return; | |
1137 | ||
5d5e5565 SS |
1138 | if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || |
1139 | test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || | |
1140 | test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { | |
1141 | QEDF_ERR(&qedf->dbg_ctx, | |
1142 | "io_req xid=0x%x already in cleanup or abort processing or already completed.\n", | |
1143 | io_req->xid); | |
1144 | return; | |
1145 | } | |
1146 | ||
61d8658b DC |
1147 | sc_cmd = io_req->sc_cmd; |
1148 | fcp_rsp = &cqe->cqe_info.rsp_info; | |
1149 | ||
1150 | if (!sc_cmd) { | |
1151 | QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); | |
1152 | return; | |
1153 | } | |
1154 | ||
a33e7925 BVA |
1155 | if (!qedf_priv(sc_cmd)->io_req) { |
1156 | QEDF_WARN(&(qedf->dbg_ctx), | |
1157 | "io_req is NULL, returned in another context.\n"); | |
61d8658b DC |
1158 | return; |
1159 | } | |
1160 | ||
5d5e5565 SS |
1161 | if (!sc_cmd->device) { |
1162 | QEDF_ERR(&qedf->dbg_ctx, | |
1163 | "Device for sc_cmd %p is NULL.\n", sc_cmd); | |
1164 | return; | |
1165 | } | |
1166 | ||
d995da61 | 1167 | if (!scsi_cmd_to_rq(sc_cmd)->q) { |
61d8658b DC |
1168 | QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request " |
1169 | "is not valid, sc_cmd=%p.\n", sc_cmd); | |
1170 | return; | |
1171 | } | |
1172 | ||
1173 | fcport = io_req->fcport; | |
1174 | ||
69ef2c69 SK |
1175 | /* |
1176 | * When flush is active, let the cmds be completed from the cleanup | |
1177 | * context | |
1178 | */ | |
1179 | if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || | |
1180 | (test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags) && | |
1181 | sc_cmd->device->lun == (u64)fcport->lun_reset_lun)) { | |
1182 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1183 | "Dropping good completion xid=0x%x as fcport is flushing", | |
1184 | io_req->xid); | |
1185 | return; | |
1186 | } | |
1187 | ||
61d8658b DC |
1188 | qedf_parse_fcp_rsp(io_req, fcp_rsp); |
1189 | ||
1190 | qedf_unmap_sg_list(qedf, io_req); | |
1191 | ||
1192 | /* Check for FCP transport error */ | |
1193 | if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) { | |
1194 | QEDF_ERR(&(qedf->dbg_ctx), | |
1195 | "FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d " | |
1196 | "fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len, | |
1197 | io_req->fcp_rsp_code); | |
1198 | sc_cmd->result = DID_BUS_BUSY << 16; | |
1199 | goto out; | |
1200 | } | |
1201 | ||
1202 | fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags, | |
1203 | FCOE_CQE_RSP_INFO_FW_UNDERRUN); | |
1204 | if (fw_residual_flag) { | |
1c816247 CD |
1205 | QEDF_ERR(&qedf->dbg_ctx, |
1206 | "Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x fcp_resid=%d fw_residual=0x%x lba=%02x%02x%02x%02x.\n", | |
1207 | io_req->xid, fcp_rsp->rsp_flags.flags, | |
1208 | io_req->fcp_resid, | |
1209 | cqe->cqe_info.rsp_info.fw_residual, sc_cmd->cmnd[2], | |
1210 | sc_cmd->cmnd[3], sc_cmd->cmnd[4], sc_cmd->cmnd[5]); | |
61d8658b DC |
1211 | |
1212 | if (io_req->cdb_status == 0) | |
1213 | sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status; | |
1214 | else | |
1215 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
1216 | ||
61d8658b DC |
1217 | /* |
1218 | * Set resid to the whole buffer length so we won't try to resue | |
1219 | * any previously data. | |
1220 | */ | |
1221 | scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); | |
1222 | goto out; | |
1223 | } | |
1224 | ||
1225 | switch (io_req->fcp_status) { | |
1226 | case FC_GOOD: | |
1227 | if (io_req->cdb_status == 0) { | |
1228 | /* Good I/O completion */ | |
1229 | sc_cmd->result = DID_OK << 16; | |
1230 | } else { | |
1afca6b5 | 1231 | refcount = kref_read(&io_req->refcount); |
61d8658b | 1232 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, |
db6b2060 | 1233 | "%d:0:%d:%lld xid=0x%0x op=0x%02x " |
61d8658b DC |
1234 | "lba=%02x%02x%02x%02x cdb_status=%d " |
1235 | "fcp_resid=0x%x refcount=%d.\n", | |
1236 | qedf->lport->host->host_no, sc_cmd->device->id, | |
1237 | sc_cmd->device->lun, io_req->xid, | |
1238 | sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3], | |
1239 | sc_cmd->cmnd[4], sc_cmd->cmnd[5], | |
1240 | io_req->cdb_status, io_req->fcp_resid, | |
1241 | refcount); | |
1242 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; | |
1243 | ||
1244 | if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || | |
1245 | io_req->cdb_status == SAM_STAT_BUSY) { | |
1246 | /* | |
1247 | * Check whether we need to set retry_delay at | |
1248 | * all based on retry_delay module parameter | |
1249 | * and the status qualifier. | |
1250 | */ | |
1251 | ||
1252 | /* Upper 2 bits */ | |
1253 | scope = fcp_rsp->retry_delay_timer & 0xC000; | |
1254 | /* Lower 14 bits */ | |
1255 | qualifier = fcp_rsp->retry_delay_timer & 0x3FFF; | |
1256 | ||
fedc173e JH |
1257 | if (qedf_retry_delay) |
1258 | chk_scope = 1; | |
642a0b37 CD |
1259 | /* Record stats */ |
1260 | if (io_req->cdb_status == | |
1261 | SAM_STAT_TASK_SET_FULL) | |
1262 | qedf->task_set_fulls++; | |
1263 | else | |
1264 | qedf->busy++; | |
61d8658b DC |
1265 | } |
1266 | } | |
1267 | if (io_req->fcp_resid) | |
1268 | scsi_set_resid(sc_cmd, io_req->fcp_resid); | |
fedc173e JH |
1269 | |
1270 | if (chk_scope == 1) { | |
1271 | if ((scope == 1 || scope == 2) && | |
1272 | (qualifier > 0 && qualifier <= 0x3FEF)) { | |
1273 | /* Check we don't go over the max */ | |
1274 | if (qualifier > QEDF_RETRY_DELAY_MAX) { | |
1275 | qualifier = QEDF_RETRY_DELAY_MAX; | |
1276 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1277 | "qualifier = %d\n", | |
1278 | (fcp_rsp->retry_delay_timer & | |
1279 | 0x3FFF)); | |
1280 | } | |
1281 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1282 | "Scope = %d and qualifier = %d", | |
1283 | scope, qualifier); | |
1284 | /* Take fcport->rport_lock to | |
1285 | * update the retry_delay_timestamp | |
1286 | */ | |
1287 | spin_lock_irqsave(&fcport->rport_lock, flags); | |
1288 | fcport->retry_delay_timestamp = | |
1289 | jiffies + (qualifier * HZ / 10); | |
1290 | spin_unlock_irqrestore(&fcport->rport_lock, | |
1291 | flags); | |
1292 | ||
1293 | } else { | |
1294 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1295 | "combination of scope = %d and qualifier = %d is not handled in qedf.\n", | |
1296 | scope, qualifier); | |
1297 | } | |
1298 | } | |
61d8658b DC |
1299 | break; |
1300 | default: | |
1301 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n", | |
1302 | io_req->fcp_status); | |
1303 | break; | |
1304 | } | |
1305 | ||
1306 | out: | |
1307 | if (qedf_io_tracing) | |
1308 | qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP); | |
1309 | ||
5d5e5565 SS |
1310 | /* |
1311 | * We wait till the end of the function to clear the | |
1312 | * outstanding bit in case we need to send an abort | |
1313 | */ | |
1314 | clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); | |
1315 | ||
61d8658b | 1316 | io_req->sc_cmd = NULL; |
a33e7925 | 1317 | qedf_priv(sc_cmd)->io_req = NULL; |
ef697683 | 1318 | scsi_done(sc_cmd); |
61d8658b DC |
1319 | kref_put(&io_req->refcount, qedf_release_cmd); |
1320 | } | |
1321 | ||
1322 | /* Return a SCSI command in some other context besides a normal completion */ | |
1323 | void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, | |
1324 | int result) | |
1325 | { | |
61d8658b DC |
1326 | struct scsi_cmnd *sc_cmd; |
1327 | int refcount; | |
1328 | ||
e82e6ff7 SK |
1329 | if (!io_req) { |
1330 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "io_req is NULL\n"); | |
61d8658b | 1331 | return; |
e82e6ff7 | 1332 | } |
61d8658b | 1333 | |
5d5e5565 SS |
1334 | if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, &io_req->flags)) { |
1335 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1336 | "io_req:%p scsi_done handling already done\n", | |
1337 | io_req); | |
1338 | return; | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * We will be done with this command after this call so clear the | |
1343 | * outstanding bit. | |
1344 | */ | |
1345 | clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); | |
1346 | ||
61d8658b DC |
1347 | sc_cmd = io_req->sc_cmd; |
1348 | ||
1349 | if (!sc_cmd) { | |
1350 | QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); | |
1351 | return; | |
1352 | } | |
1353 | ||
5d5e5565 SS |
1354 | if (!virt_addr_valid(sc_cmd)) { |
1355 | QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid.", sc_cmd); | |
627cc7dd | 1356 | goto bad_scsi_ptr; |
5d5e5565 SS |
1357 | } |
1358 | ||
a33e7925 BVA |
1359 | if (!qedf_priv(sc_cmd)->io_req) { |
1360 | QEDF_WARN(&(qedf->dbg_ctx), | |
1361 | "io_req is NULL, returned in another context.\n"); | |
61d8658b DC |
1362 | return; |
1363 | } | |
1364 | ||
5d5e5565 SS |
1365 | if (!sc_cmd->device) { |
1366 | QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n", | |
1367 | sc_cmd); | |
627cc7dd CD |
1368 | goto bad_scsi_ptr; |
1369 | } | |
1370 | ||
1371 | if (!virt_addr_valid(sc_cmd->device)) { | |
1372 | QEDF_ERR(&qedf->dbg_ctx, | |
1373 | "Device pointer for sc_cmd %p is bad.\n", sc_cmd); | |
1374 | goto bad_scsi_ptr; | |
1375 | } | |
1376 | ||
1377 | if (!sc_cmd->sense_buffer) { | |
1378 | QEDF_ERR(&qedf->dbg_ctx, | |
1379 | "sc_cmd->sense_buffer for sc_cmd %p is NULL.\n", | |
1380 | sc_cmd); | |
1381 | goto bad_scsi_ptr; | |
1382 | } | |
1383 | ||
1384 | if (!virt_addr_valid(sc_cmd->sense_buffer)) { | |
1385 | QEDF_ERR(&qedf->dbg_ctx, | |
1386 | "sc_cmd->sense_buffer for sc_cmd %p is bad.\n", | |
1387 | sc_cmd); | |
1388 | goto bad_scsi_ptr; | |
1389 | } | |
1390 | ||
61d8658b DC |
1391 | qedf_unmap_sg_list(qedf, io_req); |
1392 | ||
1393 | sc_cmd->result = result << 16; | |
1afca6b5 | 1394 | refcount = kref_read(&io_req->refcount); |
db6b2060 | 1395 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing " |
61d8658b DC |
1396 | "sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, " |
1397 | "allowed=%d retries=%d refcount=%d.\n", | |
1398 | qedf->lport->host->host_no, sc_cmd->device->id, | |
1399 | sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0], | |
1400 | sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4], | |
1401 | sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries, | |
1402 | refcount); | |
1403 | ||
1404 | /* | |
1405 | * Set resid to the whole buffer length so we won't try to resue any | |
1406 | * previously read data | |
1407 | */ | |
1408 | scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); | |
1409 | ||
1410 | if (qedf_io_tracing) | |
1411 | qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP); | |
1412 | ||
1413 | io_req->sc_cmd = NULL; | |
a33e7925 | 1414 | qedf_priv(sc_cmd)->io_req = NULL; |
ef697683 | 1415 | scsi_done(sc_cmd); |
61d8658b | 1416 | kref_put(&io_req->refcount, qedf_release_cmd); |
6f15d0c0 | 1417 | return; |
627cc7dd CD |
1418 | |
1419 | bad_scsi_ptr: | |
1420 | /* | |
1421 | * Clear the io_req->sc_cmd backpointer so we don't try to process | |
1422 | * this again | |
1423 | */ | |
1424 | io_req->sc_cmd = NULL; | |
1425 | kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 001 */ | |
61d8658b DC |
1426 | } |
1427 | ||
1428 | /* | |
1429 | * Handle warning type CQE completions. This is mainly used for REC timer | |
1430 | * popping. | |
1431 | */ | |
1432 | void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, | |
1433 | struct qedf_ioreq *io_req) | |
1434 | { | |
1435 | int rval, i; | |
1436 | struct qedf_rport *fcport = io_req->fcport; | |
1437 | u64 err_warn_bit_map; | |
1438 | u8 err_warn = 0xff; | |
1439 | ||
e82e6ff7 SK |
1440 | if (!cqe) { |
1441 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1442 | "cqe is NULL for io_req %p xid=0x%x\n", | |
1443 | io_req, io_req->xid); | |
61d8658b | 1444 | return; |
e82e6ff7 | 1445 | } |
61d8658b DC |
1446 | |
1447 | QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, " | |
1448 | "xid=0x%x\n", io_req->xid); | |
1449 | QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), | |
1450 | "err_warn_bitmap=%08x:%08x\n", | |
1451 | le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), | |
1452 | le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); | |
1453 | QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " | |
1454 | "rx_buff_off=%08x, rx_id=%04x\n", | |
1455 | le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), | |
1456 | le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), | |
1457 | le32_to_cpu(cqe->cqe_info.err_info.rx_id)); | |
1458 | ||
1459 | /* Normalize the error bitmap value to an just an unsigned int */ | |
1460 | err_warn_bit_map = (u64) | |
1461 | ((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) | | |
1462 | (u64)cqe->cqe_info.err_info.err_warn_bitmap_lo; | |
1463 | for (i = 0; i < 64; i++) { | |
1464 | if (err_warn_bit_map & (u64)((u64)1 << i)) { | |
1465 | err_warn = i; | |
1466 | break; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | /* Check if REC TOV expired if this is a tape device */ | |
1471 | if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) { | |
1472 | if (err_warn == | |
1473 | FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) { | |
1474 | QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n"); | |
1475 | if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) { | |
1476 | io_req->rx_buf_off = | |
1477 | cqe->cqe_info.err_info.rx_buf_off; | |
1478 | io_req->tx_buf_off = | |
1479 | cqe->cqe_info.err_info.tx_buf_off; | |
1480 | io_req->rx_id = cqe->cqe_info.err_info.rx_id; | |
1481 | rval = qedf_send_rec(io_req); | |
1482 | /* | |
1483 | * We only want to abort the io_req if we | |
1484 | * can't queue the REC command as we want to | |
1485 | * keep the exchange open for recovery. | |
1486 | */ | |
1487 | if (rval) | |
1488 | goto send_abort; | |
1489 | } | |
1490 | return; | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | send_abort: | |
1495 | init_completion(&io_req->abts_done); | |
1496 | rval = qedf_initiate_abts(io_req, true); | |
1497 | if (rval) | |
1498 | QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); | |
1499 | } | |
1500 | ||
1501 | /* Cleanup a command when we receive an error detection completion */ | |
1502 | void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, | |
1503 | struct qedf_ioreq *io_req) | |
1504 | { | |
1505 | int rval; | |
1506 | ||
df99446d JH |
1507 | if (io_req == NULL) { |
1508 | QEDF_INFO(NULL, QEDF_LOG_IO, "io_req is NULL.\n"); | |
1509 | return; | |
1510 | } | |
1511 | ||
1512 | if (io_req->fcport == NULL) { | |
1513 | QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); | |
1514 | return; | |
1515 | } | |
1516 | ||
e82e6ff7 SK |
1517 | if (!cqe) { |
1518 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
df99446d | 1519 | "cqe is NULL for io_req %p\n", io_req); |
61d8658b | 1520 | return; |
e82e6ff7 | 1521 | } |
61d8658b DC |
1522 | |
1523 | QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, " | |
1524 | "xid=0x%x\n", io_req->xid); | |
1525 | QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), | |
1526 | "err_warn_bitmap=%08x:%08x\n", | |
1527 | le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), | |
1528 | le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); | |
1529 | QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " | |
1530 | "rx_buff_off=%08x, rx_id=%04x\n", | |
1531 | le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), | |
1532 | le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), | |
1533 | le32_to_cpu(cqe->cqe_info.err_info.rx_id)); | |
1534 | ||
df99446d JH |
1535 | /* When flush is active, let the cmds be flushed out from the cleanup context */ |
1536 | if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &io_req->fcport->flags) || | |
1537 | (test_bit(QEDF_RPORT_IN_LUN_RESET, &io_req->fcport->flags) && | |
1538 | io_req->sc_cmd->device->lun == (u64)io_req->fcport->lun_reset_lun)) { | |
1539 | QEDF_ERR(&qedf->dbg_ctx, | |
1540 | "Dropping EQE for xid=0x%x as fcport is flushing", | |
1541 | io_req->xid); | |
1542 | return; | |
1543 | } | |
1544 | ||
61d8658b DC |
1545 | if (qedf->stop_io_on_error) { |
1546 | qedf_stop_all_io(qedf); | |
1547 | return; | |
1548 | } | |
1549 | ||
1550 | init_completion(&io_req->abts_done); | |
1551 | rval = qedf_initiate_abts(io_req, true); | |
1552 | if (rval) | |
1553 | QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); | |
1554 | } | |
1555 | ||
1556 | static void qedf_flush_els_req(struct qedf_ctx *qedf, | |
1557 | struct qedf_ioreq *els_req) | |
1558 | { | |
1559 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, | |
1560 | "Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid, | |
1afca6b5 | 1561 | kref_read(&els_req->refcount)); |
61d8658b DC |
1562 | |
1563 | /* | |
1564 | * Need to distinguish this from a timeout when calling the | |
1565 | * els_req->cb_func. | |
1566 | */ | |
1567 | els_req->event = QEDF_IOREQ_EV_ELS_FLUSH; | |
1568 | ||
3079285b SK |
1569 | clear_bit(QEDF_CMD_OUTSTANDING, &els_req->flags); |
1570 | ||
61d8658b DC |
1571 | /* Cancel the timer */ |
1572 | cancel_delayed_work_sync(&els_req->timeout_work); | |
1573 | ||
1574 | /* Call callback function to complete command */ | |
1575 | if (els_req->cb_func && els_req->cb_arg) { | |
1576 | els_req->cb_func(els_req->cb_arg); | |
1577 | els_req->cb_arg = NULL; | |
1578 | } | |
1579 | ||
1580 | /* Release kref for original initiate_els */ | |
1581 | kref_put(&els_req->refcount, qedf_release_cmd); | |
1582 | } | |
1583 | ||
1584 | /* A value of -1 for lun is a wild card that means flush all | |
1585 | * active SCSI I/Os for the target. | |
1586 | */ | |
ade4fb94 | 1587 | void qedf_flush_active_ios(struct qedf_rport *fcport, u64 lun) |
61d8658b DC |
1588 | { |
1589 | struct qedf_ioreq *io_req; | |
1590 | struct qedf_ctx *qedf; | |
1591 | struct qedf_cmd_mgr *cmd_mgr; | |
1592 | int i, rc; | |
5d5e5565 SS |
1593 | unsigned long flags; |
1594 | int flush_cnt = 0; | |
1595 | int wait_cnt = 100; | |
1596 | int refcount = 0; | |
61d8658b | 1597 | |
e82e6ff7 SK |
1598 | if (!fcport) { |
1599 | QEDF_ERR(NULL, "fcport is NULL\n"); | |
61d8658b | 1600 | return; |
e82e6ff7 | 1601 | } |
61d8658b | 1602 | |
766639ca CD |
1603 | /* Check that fcport is still offloaded */ |
1604 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { | |
1605 | QEDF_ERR(NULL, "fcport is no longer offloaded.\n"); | |
1606 | return; | |
1607 | } | |
1608 | ||
61d8658b | 1609 | qedf = fcport->qedf; |
5d5e5565 SS |
1610 | |
1611 | if (!qedf) { | |
1612 | QEDF_ERR(NULL, "qedf is NULL.\n"); | |
1613 | return; | |
1614 | } | |
1615 | ||
1616 | /* Only wait for all commands to be queued in the Upload context */ | |
1617 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && | |
1618 | (lun == -1)) { | |
1619 | while (atomic_read(&fcport->ios_to_queue)) { | |
1620 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1621 | "Waiting for %d I/Os to be queued\n", | |
1622 | atomic_read(&fcport->ios_to_queue)); | |
1623 | if (wait_cnt == 0) { | |
1624 | QEDF_ERR(NULL, | |
1625 | "%d IOs request could not be queued\n", | |
1626 | atomic_read(&fcport->ios_to_queue)); | |
1627 | } | |
1628 | msleep(20); | |
1629 | wait_cnt--; | |
1630 | } | |
1631 | } | |
1632 | ||
61d8658b DC |
1633 | cmd_mgr = qedf->cmd_mgr; |
1634 | ||
5d5e5565 SS |
1635 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
1636 | "Flush active i/o's num=0x%x fcport=0x%p port_id=0x%06x scsi_id=%d.\n", | |
1637 | atomic_read(&fcport->num_active_ios), fcport, | |
1638 | fcport->rdata->ids.port_id, fcport->rport->scsi_target_id); | |
1639 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Locking flush mutex.\n"); | |
1640 | ||
1641 | mutex_lock(&qedf->flush_mutex); | |
1642 | if (lun == -1) { | |
1643 | set_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); | |
1644 | } else { | |
1645 | set_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); | |
1646 | fcport->lun_reset_lun = lun; | |
1647 | } | |
61d8658b DC |
1648 | |
1649 | for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { | |
1650 | io_req = &cmd_mgr->cmds[i]; | |
1651 | ||
1652 | if (!io_req) | |
1653 | continue; | |
5d5e5565 SS |
1654 | if (!io_req->fcport) |
1655 | continue; | |
1656 | ||
1657 | spin_lock_irqsave(&cmd_mgr->lock, flags); | |
1658 | ||
1659 | if (io_req->alloc) { | |
1660 | if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { | |
1661 | if (io_req->cmd_type == QEDF_SCSI_CMD) | |
1662 | QEDF_ERR(&qedf->dbg_ctx, | |
1663 | "Allocated but not queued, xid=0x%x\n", | |
1664 | io_req->xid); | |
1665 | } | |
1666 | spin_unlock_irqrestore(&cmd_mgr->lock, flags); | |
1667 | } else { | |
1668 | spin_unlock_irqrestore(&cmd_mgr->lock, flags); | |
1669 | continue; | |
1670 | } | |
1671 | ||
61d8658b DC |
1672 | if (io_req->fcport != fcport) |
1673 | continue; | |
5d5e5565 SS |
1674 | |
1675 | /* In case of ABTS, CMD_OUTSTANDING is cleared on ABTS response, | |
1676 | * but RRQ is still pending. | |
1677 | * Workaround: Within qedf_send_rrq, we check if the fcport is | |
1678 | * NULL, and we drop the ref on the io_req to clean it up. | |
1679 | */ | |
1680 | if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { | |
1681 | refcount = kref_read(&io_req->refcount); | |
1682 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1683 | "Not outstanding, xid=0x%x, cmd_type=%d refcount=%d.\n", | |
1684 | io_req->xid, io_req->cmd_type, refcount); | |
faea5719 SS |
1685 | /* If RRQ work has been queue, try to cancel it and |
1686 | * free the io_req | |
1687 | */ | |
1688 | if (atomic_read(&io_req->state) == | |
1689 | QEDFC_CMD_ST_RRQ_WAIT) { | |
1690 | if (cancel_delayed_work_sync | |
1691 | (&io_req->rrq_work)) { | |
1692 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1693 | "Putting reference for pending RRQ work xid=0x%x.\n", | |
1694 | io_req->xid); | |
1695 | /* ID: 003 */ | |
1696 | kref_put(&io_req->refcount, | |
1697 | qedf_release_cmd); | |
1698 | } | |
1699 | } | |
5d5e5565 SS |
1700 | continue; |
1701 | } | |
1702 | ||
1703 | /* Only consider flushing ELS during target reset */ | |
1704 | if (io_req->cmd_type == QEDF_ELS && | |
1705 | lun == -1) { | |
61d8658b DC |
1706 | rc = kref_get_unless_zero(&io_req->refcount); |
1707 | if (!rc) { | |
1708 | QEDF_ERR(&(qedf->dbg_ctx), | |
8025c842 CD |
1709 | "Could not get kref for ELS io_req=0x%p xid=0x%x.\n", |
1710 | io_req, io_req->xid); | |
61d8658b DC |
1711 | continue; |
1712 | } | |
1f6d1d4c | 1713 | qedf_initiate_cleanup(io_req, false); |
5d5e5565 | 1714 | flush_cnt++; |
61d8658b | 1715 | qedf_flush_els_req(qedf, io_req); |
1f6d1d4c | 1716 | |
61d8658b DC |
1717 | /* |
1718 | * Release the kref and go back to the top of the | |
1719 | * loop. | |
1720 | */ | |
1721 | goto free_cmd; | |
1722 | } | |
1723 | ||
92bbccdf | 1724 | if (io_req->cmd_type == QEDF_ABTS) { |
faea5719 | 1725 | /* ID: 004 */ |
92bbccdf CD |
1726 | rc = kref_get_unless_zero(&io_req->refcount); |
1727 | if (!rc) { | |
1728 | QEDF_ERR(&(qedf->dbg_ctx), | |
1729 | "Could not get kref for abort io_req=0x%p xid=0x%x.\n", | |
1730 | io_req, io_req->xid); | |
1731 | continue; | |
1732 | } | |
5d5e5565 SS |
1733 | if (lun != -1 && io_req->lun != lun) |
1734 | goto free_cmd; | |
1735 | ||
92bbccdf CD |
1736 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
1737 | "Flushing abort xid=0x%x.\n", io_req->xid); | |
1738 | ||
5d5e5565 SS |
1739 | if (cancel_delayed_work_sync(&io_req->rrq_work)) { |
1740 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
faea5719 | 1741 | "Putting ref for cancelled RRQ work xid=0x%x.\n", |
5d5e5565 SS |
1742 | io_req->xid); |
1743 | kref_put(&io_req->refcount, qedf_release_cmd); | |
92bbccdf CD |
1744 | } |
1745 | ||
faea5719 SS |
1746 | if (cancel_delayed_work_sync(&io_req->timeout_work)) { |
1747 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1748 | "Putting ref for cancelled tmo work xid=0x%x.\n", | |
1749 | io_req->xid); | |
1750 | qedf_initiate_cleanup(io_req, true); | |
1751 | /* Notify eh_abort handler that ABTS is | |
1752 | * complete | |
1753 | */ | |
1754 | complete(&io_req->abts_done); | |
1755 | clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); | |
1756 | /* ID: 002 */ | |
1757 | kref_put(&io_req->refcount, qedf_release_cmd); | |
1758 | } | |
5d5e5565 | 1759 | flush_cnt++; |
92bbccdf CD |
1760 | goto free_cmd; |
1761 | } | |
1762 | ||
61d8658b DC |
1763 | if (!io_req->sc_cmd) |
1764 | continue; | |
5d5e5565 SS |
1765 | if (!io_req->sc_cmd->device) { |
1766 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1767 | "Device backpointer NULL for sc_cmd=%p.\n", | |
1768 | io_req->sc_cmd); | |
1769 | /* Put reference for non-existent scsi_cmnd */ | |
1770 | io_req->sc_cmd = NULL; | |
1771 | qedf_initiate_cleanup(io_req, false); | |
1772 | kref_put(&io_req->refcount, qedf_release_cmd); | |
1773 | continue; | |
1774 | } | |
61d8658b DC |
1775 | |
1776 | /* | |
1777 | * Use kref_get_unless_zero in the unlikely case the command | |
1778 | * we're about to flush was completed in the normal SCSI path | |
1779 | */ | |
1780 | rc = kref_get_unless_zero(&io_req->refcount); | |
1781 | if (!rc) { | |
1782 | QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for " | |
8025c842 | 1783 | "io_req=0x%p xid=0x%x\n", io_req, io_req->xid); |
61d8658b DC |
1784 | continue; |
1785 | } | |
5d5e5565 | 1786 | |
61d8658b DC |
1787 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, |
1788 | "Cleanup xid=0x%x.\n", io_req->xid); | |
5d5e5565 | 1789 | flush_cnt++; |
61d8658b DC |
1790 | |
1791 | /* Cleanup task and return I/O mid-layer */ | |
1792 | qedf_initiate_cleanup(io_req, true); | |
1793 | ||
1794 | free_cmd: | |
faea5719 | 1795 | kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 004 */ |
61d8658b | 1796 | } |
5d5e5565 SS |
1797 | |
1798 | wait_cnt = 60; | |
1799 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1800 | "Flushed 0x%x I/Os, active=0x%x.\n", | |
1801 | flush_cnt, atomic_read(&fcport->num_active_ios)); | |
1802 | /* Only wait for all commands to complete in the Upload context */ | |
1803 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && | |
1804 | (lun == -1)) { | |
1805 | while (atomic_read(&fcport->num_active_ios)) { | |
1806 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1807 | "Flushed 0x%x I/Os, active=0x%x cnt=%d.\n", | |
1808 | flush_cnt, | |
1809 | atomic_read(&fcport->num_active_ios), | |
1810 | wait_cnt); | |
1811 | if (wait_cnt == 0) { | |
1812 | QEDF_ERR(&qedf->dbg_ctx, | |
1813 | "Flushed %d I/Os, active=%d.\n", | |
1814 | flush_cnt, | |
1815 | atomic_read(&fcport->num_active_ios)); | |
1816 | for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { | |
1817 | io_req = &cmd_mgr->cmds[i]; | |
1818 | if (io_req->fcport && | |
1819 | io_req->fcport == fcport) { | |
1820 | refcount = | |
1821 | kref_read(&io_req->refcount); | |
feac47f5 SS |
1822 | set_bit(QEDF_CMD_DIRTY, |
1823 | &io_req->flags); | |
5d5e5565 SS |
1824 | QEDF_ERR(&qedf->dbg_ctx, |
1825 | "Outstanding io_req =%p xid=0x%x flags=0x%lx, sc_cmd=%p refcount=%d cmd_type=%d.\n", | |
1826 | io_req, io_req->xid, | |
1827 | io_req->flags, | |
1828 | io_req->sc_cmd, | |
1829 | refcount, | |
1830 | io_req->cmd_type); | |
1831 | } | |
1832 | } | |
1833 | WARN_ON(1); | |
1834 | break; | |
1835 | } | |
1836 | msleep(500); | |
1837 | wait_cnt--; | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | clear_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); | |
1842 | clear_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); | |
1843 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n"); | |
1844 | mutex_unlock(&qedf->flush_mutex); | |
61d8658b DC |
1845 | } |
1846 | ||
1847 | /* | |
1848 | * Initiate a ABTS middle path command. Note that we don't have to initialize | |
1849 | * the task context for an ABTS task. | |
1850 | */ | |
1851 | int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts) | |
1852 | { | |
1853 | struct fc_lport *lport; | |
1854 | struct qedf_rport *fcport = io_req->fcport; | |
ff34e8e8 CD |
1855 | struct fc_rport_priv *rdata; |
1856 | struct qedf_ctx *qedf; | |
61d8658b | 1857 | u16 xid; |
61d8658b DC |
1858 | int rc = 0; |
1859 | unsigned long flags; | |
be086e7c MY |
1860 | struct fcoe_wqe *sqe; |
1861 | u16 sqe_idx; | |
69ef2c69 | 1862 | int refcount = 0; |
61d8658b | 1863 | |
ff34e8e8 | 1864 | /* Sanity check qedf_rport before dereferencing any pointers */ |
61d8658b | 1865 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { |
ff34e8e8 | 1866 | QEDF_ERR(NULL, "tgt not offloaded\n"); |
61d8658b | 1867 | rc = 1; |
69ef2c69 | 1868 | goto out; |
61d8658b DC |
1869 | } |
1870 | ||
56efc304 | 1871 | qedf = fcport->qedf; |
ff34e8e8 | 1872 | rdata = fcport->rdata; |
69ef2c69 SK |
1873 | |
1874 | if (!rdata || !kref_get_unless_zero(&rdata->kref)) { | |
1875 | QEDF_ERR(&qedf->dbg_ctx, "stale rport\n"); | |
1876 | rc = 1; | |
1877 | goto out; | |
1878 | } | |
1879 | ||
ff34e8e8 CD |
1880 | lport = qedf->lport; |
1881 | ||
61d8658b DC |
1882 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { |
1883 | QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); | |
1884 | rc = 1; | |
56efc304 | 1885 | goto drop_rdata_kref; |
61d8658b DC |
1886 | } |
1887 | ||
1888 | if (atomic_read(&qedf->link_down_tmo_valid) > 0) { | |
1889 | QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n"); | |
1890 | rc = 1; | |
56efc304 | 1891 | goto drop_rdata_kref; |
61d8658b DC |
1892 | } |
1893 | ||
1894 | /* Ensure room on SQ */ | |
1895 | if (!atomic_read(&fcport->free_sqes)) { | |
1896 | QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); | |
1897 | rc = 1; | |
56efc304 | 1898 | goto drop_rdata_kref; |
61d8658b DC |
1899 | } |
1900 | ||
92bbccdf CD |
1901 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { |
1902 | QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n"); | |
1903 | rc = 1; | |
56efc304 | 1904 | goto drop_rdata_kref; |
92bbccdf | 1905 | } |
61d8658b | 1906 | |
7df0b260 | 1907 | spin_lock_irqsave(&fcport->rport_lock, flags); |
f3690a89 CD |
1908 | if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || |
1909 | test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || | |
1910 | test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { | |
276eb3e5 CD |
1911 | QEDF_ERR(&qedf->dbg_ctx, |
1912 | "io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n", | |
1913 | io_req->xid, io_req->sc_cmd); | |
f3690a89 | 1914 | rc = 1; |
7df0b260 | 1915 | spin_unlock_irqrestore(&fcport->rport_lock, flags); |
56efc304 | 1916 | goto drop_rdata_kref; |
f3690a89 | 1917 | } |
61d8658b | 1918 | |
7df0b260 JH |
1919 | /* Set the command type to abort */ |
1920 | io_req->cmd_type = QEDF_ABTS; | |
1921 | spin_unlock_irqrestore(&fcport->rport_lock, flags); | |
1922 | ||
61d8658b DC |
1923 | kref_get(&io_req->refcount); |
1924 | ||
1925 | xid = io_req->xid; | |
1926 | qedf->control_requests++; | |
1927 | qedf->packet_aborts++; | |
1928 | ||
61d8658b DC |
1929 | io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; |
1930 | ||
1931 | set_bit(QEDF_CMD_IN_ABORT, &io_req->flags); | |
69ef2c69 SK |
1932 | refcount = kref_read(&io_req->refcount); |
1933 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, | |
1934 | "ABTS io_req xid = 0x%x refcount=%d\n", | |
1935 | xid, refcount); | |
61d8658b | 1936 | |
69ef2c69 | 1937 | qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT); |
61d8658b DC |
1938 | |
1939 | spin_lock_irqsave(&fcport->rport_lock, flags); | |
1940 | ||
be086e7c MY |
1941 | sqe_idx = qedf_get_sqe_idx(fcport); |
1942 | sqe = &fcport->sq[sqe_idx]; | |
1943 | memset(sqe, 0, sizeof(struct fcoe_wqe)); | |
1944 | io_req->task_params->sqe = sqe; | |
61d8658b | 1945 | |
be086e7c | 1946 | init_initiator_abort_fcoe_task(io_req->task_params); |
61d8658b DC |
1947 | qedf_ring_doorbell(fcport); |
1948 | ||
1949 | spin_unlock_irqrestore(&fcport->rport_lock, flags); | |
1950 | ||
56efc304 HR |
1951 | drop_rdata_kref: |
1952 | kref_put(&rdata->kref, fc_rport_destroy); | |
92bbccdf | 1953 | out: |
61d8658b DC |
1954 | return rc; |
1955 | } | |
1956 | ||
1957 | void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, | |
1958 | struct qedf_ioreq *io_req) | |
1959 | { | |
1960 | uint32_t r_ctl; | |
69ef2c69 SK |
1961 | int rc; |
1962 | struct qedf_rport *fcport = io_req->fcport; | |
61d8658b DC |
1963 | |
1964 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = " | |
1965 | "0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type); | |
1966 | ||
61d8658b DC |
1967 | r_ctl = cqe->cqe_info.abts_info.r_ctl; |
1968 | ||
69ef2c69 SK |
1969 | /* This was added at a point when we were scheduling abts_compl & |
1970 | * cleanup_compl on different CPUs and there was a possibility of | |
1971 | * the io_req to be freed from the other context before we got here. | |
1972 | */ | |
1973 | if (!fcport) { | |
1974 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1975 | "Dropping ABTS completion xid=0x%x as fcport is NULL", | |
1976 | io_req->xid); | |
1977 | return; | |
1978 | } | |
1979 | ||
1980 | /* | |
1981 | * When flush is active, let the cmds be completed from the cleanup | |
1982 | * context | |
1983 | */ | |
1984 | if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || | |
1985 | test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags)) { | |
1986 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, | |
1987 | "Dropping ABTS completion xid=0x%x as fcport is flushing", | |
1988 | io_req->xid); | |
1989 | return; | |
1990 | } | |
1991 | ||
1992 | if (!cancel_delayed_work(&io_req->timeout_work)) { | |
1993 | QEDF_ERR(&qedf->dbg_ctx, | |
1994 | "Wasn't able to cancel abts timeout work.\n"); | |
1995 | } | |
1996 | ||
61d8658b DC |
1997 | switch (r_ctl) { |
1998 | case FC_RCTL_BA_ACC: | |
1999 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, | |
2000 | "ABTS response - ACC Send RRQ after R_A_TOV\n"); | |
2001 | io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS; | |
faea5719 | 2002 | rc = kref_get_unless_zero(&io_req->refcount); /* ID: 003 */ |
69ef2c69 SK |
2003 | if (!rc) { |
2004 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, | |
2005 | "kref is already zero so ABTS was already completed or flushed xid=0x%x.\n", | |
2006 | io_req->xid); | |
2007 | return; | |
2008 | } | |
61d8658b DC |
2009 | /* |
2010 | * Dont release this cmd yet. It will be relesed | |
2011 | * after we get RRQ response | |
2012 | */ | |
61d8658b DC |
2013 | queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work, |
2014 | msecs_to_jiffies(qedf->lport->r_a_tov)); | |
faea5719 | 2015 | atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_WAIT); |
61d8658b DC |
2016 | break; |
2017 | /* For error cases let the cleanup return the command */ | |
2018 | case FC_RCTL_BA_RJT: | |
2019 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, | |
2020 | "ABTS response - RJT\n"); | |
2021 | io_req->event = QEDF_IOREQ_EV_ABORT_FAILED; | |
2022 | break; | |
2023 | default: | |
2024 | QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n"); | |
2025 | break; | |
2026 | } | |
2027 | ||
2028 | clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); | |
2029 | ||
2030 | if (io_req->sc_cmd) { | |
e82e6ff7 SK |
2031 | if (!io_req->return_scsi_cmd_on_abts) |
2032 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, | |
2033 | "Not call scsi_done for xid=0x%x.\n", | |
2034 | io_req->xid); | |
61d8658b DC |
2035 | if (io_req->return_scsi_cmd_on_abts) |
2036 | qedf_scsi_done(qedf, io_req, DID_ERROR); | |
2037 | } | |
2038 | ||
2039 | /* Notify eh_abort handler that ABTS is complete */ | |
2040 | complete(&io_req->abts_done); | |
2041 | ||
2042 | kref_put(&io_req->refcount, qedf_release_cmd); | |
2043 | } | |
2044 | ||
2045 | int qedf_init_mp_req(struct qedf_ioreq *io_req) | |
2046 | { | |
2047 | struct qedf_mp_req *mp_req; | |
be086e7c MY |
2048 | struct scsi_sge *mp_req_bd; |
2049 | struct scsi_sge *mp_resp_bd; | |
61d8658b DC |
2050 | struct qedf_ctx *qedf = io_req->fcport->qedf; |
2051 | dma_addr_t addr; | |
2052 | uint64_t sz; | |
2053 | ||
2054 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n"); | |
2055 | ||
2056 | mp_req = (struct qedf_mp_req *)&(io_req->mp_req); | |
2057 | memset(mp_req, 0, sizeof(struct qedf_mp_req)); | |
2058 | ||
2059 | if (io_req->cmd_type != QEDF_ELS) { | |
2060 | mp_req->req_len = sizeof(struct fcp_cmnd); | |
2061 | io_req->data_xfer_len = mp_req->req_len; | |
2062 | } else | |
2063 | mp_req->req_len = io_req->data_xfer_len; | |
2064 | ||
2065 | mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, | |
2066 | &mp_req->req_buf_dma, GFP_KERNEL); | |
2067 | if (!mp_req->req_buf) { | |
2068 | QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n"); | |
2069 | qedf_free_mp_resc(io_req); | |
2070 | return -ENOMEM; | |
2071 | } | |
2072 | ||
2073 | mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev, | |
2074 | QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL); | |
2075 | if (!mp_req->resp_buf) { | |
2076 | QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp " | |
2077 | "buffer\n"); | |
2078 | qedf_free_mp_resc(io_req); | |
2079 | return -ENOMEM; | |
2080 | } | |
2081 | ||
2082 | /* Allocate and map mp_req_bd and mp_resp_bd */ | |
be086e7c | 2083 | sz = sizeof(struct scsi_sge); |
61d8658b DC |
2084 | mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, |
2085 | &mp_req->mp_req_bd_dma, GFP_KERNEL); | |
2086 | if (!mp_req->mp_req_bd) { | |
2087 | QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n"); | |
2088 | qedf_free_mp_resc(io_req); | |
2089 | return -ENOMEM; | |
2090 | } | |
2091 | ||
2092 | mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, | |
2093 | &mp_req->mp_resp_bd_dma, GFP_KERNEL); | |
2094 | if (!mp_req->mp_resp_bd) { | |
2095 | QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n"); | |
2096 | qedf_free_mp_resc(io_req); | |
2097 | return -ENOMEM; | |
2098 | } | |
2099 | ||
2100 | /* Fill bd table */ | |
2101 | addr = mp_req->req_buf_dma; | |
2102 | mp_req_bd = mp_req->mp_req_bd; | |
2103 | mp_req_bd->sge_addr.lo = U64_LO(addr); | |
2104 | mp_req_bd->sge_addr.hi = U64_HI(addr); | |
be086e7c | 2105 | mp_req_bd->sge_len = QEDF_PAGE_SIZE; |
61d8658b DC |
2106 | |
2107 | /* | |
2108 | * MP buffer is either a task mgmt command or an ELS. | |
2109 | * So the assumption is that it consumes a single bd | |
2110 | * entry in the bd table | |
2111 | */ | |
2112 | mp_resp_bd = mp_req->mp_resp_bd; | |
2113 | addr = mp_req->resp_buf_dma; | |
2114 | mp_resp_bd->sge_addr.lo = U64_LO(addr); | |
2115 | mp_resp_bd->sge_addr.hi = U64_HI(addr); | |
be086e7c | 2116 | mp_resp_bd->sge_len = QEDF_PAGE_SIZE; |
61d8658b DC |
2117 | |
2118 | return 0; | |
2119 | } | |
2120 | ||
2121 | /* | |
2122 | * Last ditch effort to clear the port if it's stuck. Used only after a | |
2123 | * cleanup task times out. | |
2124 | */ | |
2125 | static void qedf_drain_request(struct qedf_ctx *qedf) | |
2126 | { | |
2127 | if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { | |
2128 | QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n"); | |
2129 | return; | |
2130 | } | |
2131 | ||
2132 | /* Set bit to return all queuecommand requests as busy */ | |
2133 | set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); | |
2134 | ||
2135 | /* Call qed drain request for function. Should be synchronous */ | |
2136 | qed_ops->common->drain(qedf->cdev); | |
2137 | ||
2138 | /* Settle time for CQEs to be returned */ | |
2139 | msleep(100); | |
2140 | ||
2141 | /* Unplug and continue */ | |
2142 | clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); | |
2143 | } | |
2144 | ||
2145 | /* | |
2146 | * Returns SUCCESS if the cleanup task does not timeout, otherwise return | |
2147 | * FAILURE. | |
2148 | */ | |
2149 | int qedf_initiate_cleanup(struct qedf_ioreq *io_req, | |
2150 | bool return_scsi_cmd_on_abts) | |
2151 | { | |
2152 | struct qedf_rport *fcport; | |
2153 | struct qedf_ctx *qedf; | |
61d8658b DC |
2154 | int tmo = 0; |
2155 | int rc = SUCCESS; | |
2156 | unsigned long flags; | |
be086e7c MY |
2157 | struct fcoe_wqe *sqe; |
2158 | u16 sqe_idx; | |
5d5e5565 | 2159 | int refcount = 0; |
61d8658b DC |
2160 | |
2161 | fcport = io_req->fcport; | |
2162 | if (!fcport) { | |
2163 | QEDF_ERR(NULL, "fcport is NULL.\n"); | |
2164 | return SUCCESS; | |
2165 | } | |
2166 | ||
ff34e8e8 CD |
2167 | /* Sanity check qedf_rport before dereferencing any pointers */ |
2168 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { | |
2169 | QEDF_ERR(NULL, "tgt not offloaded\n"); | |
ff34e8e8 CD |
2170 | return SUCCESS; |
2171 | } | |
2172 | ||
61d8658b DC |
2173 | qedf = fcport->qedf; |
2174 | if (!qedf) { | |
2175 | QEDF_ERR(NULL, "qedf is NULL.\n"); | |
2176 | return SUCCESS; | |
2177 | } | |
2178 | ||
1f6d1d4c SK |
2179 | if (io_req->cmd_type == QEDF_ELS) { |
2180 | goto process_els; | |
2181 | } | |
2182 | ||
61d8658b | 2183 | if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || |
5d5e5565 | 2184 | test_and_set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) { |
61d8658b DC |
2185 | QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in " |
2186 | "cleanup processing or already completed.\n", | |
2187 | io_req->xid); | |
2188 | return SUCCESS; | |
2189 | } | |
96b1765a | 2190 | set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); |
61d8658b | 2191 | |
1f6d1d4c | 2192 | process_els: |
61d8658b DC |
2193 | /* Ensure room on SQ */ |
2194 | if (!atomic_read(&fcport->free_sqes)) { | |
2195 | QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); | |
96b1765a CD |
2196 | /* Need to make sure we clear the flag since it was set */ |
2197 | clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); | |
61d8658b DC |
2198 | return FAILED; |
2199 | } | |
2200 | ||
5d5e5565 SS |
2201 | if (io_req->cmd_type == QEDF_CLEANUP) { |
2202 | QEDF_ERR(&qedf->dbg_ctx, | |
2203 | "io_req=0x%x is already a cleanup command cmd_type=%d.\n", | |
2204 | io_req->xid, io_req->cmd_type); | |
2205 | clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); | |
2206 | return SUCCESS; | |
2207 | } | |
2208 | ||
2209 | refcount = kref_read(&io_req->refcount); | |
61d8658b | 2210 | |
5d5e5565 | 2211 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
50ed27cb | 2212 | "Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n", |
5d5e5565 | 2213 | io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags, |
50ed27cb | 2214 | refcount, fcport, fcport->rdata->ids.port_id); |
61d8658b DC |
2215 | |
2216 | /* Cleanup cmds re-use the same TID as the original I/O */ | |
7df0b260 | 2217 | spin_lock_irqsave(&fcport->rport_lock, flags); |
61d8658b | 2218 | io_req->cmd_type = QEDF_CLEANUP; |
7df0b260 | 2219 | spin_unlock_irqrestore(&fcport->rport_lock, flags); |
61d8658b DC |
2220 | io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; |
2221 | ||
96b1765a | 2222 | init_completion(&io_req->cleanup_done); |
61d8658b | 2223 | |
61d8658b | 2224 | spin_lock_irqsave(&fcport->rport_lock, flags); |
61d8658b | 2225 | |
be086e7c MY |
2226 | sqe_idx = qedf_get_sqe_idx(fcport); |
2227 | sqe = &fcport->sq[sqe_idx]; | |
2228 | memset(sqe, 0, sizeof(struct fcoe_wqe)); | |
2229 | io_req->task_params->sqe = sqe; | |
2230 | ||
2231 | init_initiator_cleanup_fcoe_task(io_req->task_params); | |
61d8658b | 2232 | qedf_ring_doorbell(fcport); |
be086e7c | 2233 | |
61d8658b DC |
2234 | spin_unlock_irqrestore(&fcport->rport_lock, flags); |
2235 | ||
96b1765a CD |
2236 | tmo = wait_for_completion_timeout(&io_req->cleanup_done, |
2237 | QEDF_CLEANUP_TIMEOUT * HZ); | |
61d8658b DC |
2238 | |
2239 | if (!tmo) { | |
2240 | rc = FAILED; | |
2241 | /* Timeout case */ | |
2242 | QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, " | |
2243 | "xid=%x.\n", io_req->xid); | |
2244 | clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); | |
2245 | /* Issue a drain request if cleanup task times out */ | |
2246 | QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n"); | |
2247 | qedf_drain_request(qedf); | |
2248 | } | |
2249 | ||
5d5e5565 SS |
2250 | /* If it TASK MGMT handle it, reference will be decreased |
2251 | * in qedf_execute_tmf | |
2252 | */ | |
f2c98af4 SK |
2253 | if (io_req->tm_flags == FCP_TMF_LUN_RESET || |
2254 | io_req->tm_flags == FCP_TMF_TGT_RESET) { | |
5d5e5565 SS |
2255 | clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); |
2256 | io_req->sc_cmd = NULL; | |
5239ab63 | 2257 | kref_put(&io_req->refcount, qedf_release_cmd); |
5d5e5565 SS |
2258 | complete(&io_req->tm_done); |
2259 | } | |
2260 | ||
61d8658b | 2261 | if (io_req->sc_cmd) { |
e82e6ff7 SK |
2262 | if (!io_req->return_scsi_cmd_on_abts) |
2263 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, | |
2264 | "Not call scsi_done for xid=0x%x.\n", | |
2265 | io_req->xid); | |
61d8658b DC |
2266 | if (io_req->return_scsi_cmd_on_abts) |
2267 | qedf_scsi_done(qedf, io_req, DID_ERROR); | |
2268 | } | |
2269 | ||
2270 | if (rc == SUCCESS) | |
2271 | io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS; | |
2272 | else | |
2273 | io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED; | |
2274 | ||
2275 | return rc; | |
2276 | } | |
2277 | ||
2278 | void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, | |
2279 | struct qedf_ioreq *io_req) | |
2280 | { | |
2281 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n", | |
2282 | io_req->xid); | |
2283 | ||
2284 | clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); | |
2285 | ||
2286 | /* Complete so we can finish cleaning up the I/O */ | |
96b1765a | 2287 | complete(&io_req->cleanup_done); |
61d8658b DC |
2288 | } |
2289 | ||
ade4fb94 | 2290 | static int qedf_execute_tmf(struct qedf_rport *fcport, u64 tm_lun, |
61d8658b DC |
2291 | uint8_t tm_flags) |
2292 | { | |
2293 | struct qedf_ioreq *io_req; | |
fb09a1ed | 2294 | struct fcoe_task_context *task; |
61d8658b | 2295 | struct qedf_ctx *qedf = fcport->qedf; |
be086e7c | 2296 | struct fc_lport *lport = qedf->lport; |
61d8658b DC |
2297 | int rc = 0; |
2298 | uint16_t xid; | |
61d8658b DC |
2299 | int tmo = 0; |
2300 | unsigned long flags; | |
be086e7c MY |
2301 | struct fcoe_wqe *sqe; |
2302 | u16 sqe_idx; | |
61d8658b | 2303 | |
57a3548a | 2304 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { |
61d8658b DC |
2305 | QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n"); |
2306 | rc = FAILED; | |
fe2043d1 | 2307 | goto no_flush; |
56efc304 | 2308 | } |
61d8658b DC |
2309 | |
2310 | io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD); | |
2311 | if (!io_req) { | |
2312 | QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF"); | |
2313 | rc = -EAGAIN; | |
fe2043d1 | 2314 | goto no_flush; |
61d8658b DC |
2315 | } |
2316 | ||
642a0b37 CD |
2317 | if (tm_flags == FCP_TMF_LUN_RESET) |
2318 | qedf->lun_resets++; | |
2319 | else if (tm_flags == FCP_TMF_TGT_RESET) | |
2320 | qedf->target_resets++; | |
2321 | ||
61d8658b | 2322 | /* Initialize rest of io_req fields */ |
ade4fb94 | 2323 | io_req->sc_cmd = NULL; |
61d8658b DC |
2324 | io_req->fcport = fcport; |
2325 | io_req->cmd_type = QEDF_TASK_MGMT_CMD; | |
2326 | ||
69ef2c69 | 2327 | /* Record which cpu this request is associated with */ |
61d8658b DC |
2328 | io_req->cpu = smp_processor_id(); |
2329 | ||
61d8658b | 2330 | /* Set TM flags */ |
be086e7c MY |
2331 | io_req->io_req_flags = QEDF_READ; |
2332 | io_req->data_xfer_len = 0; | |
2333 | io_req->tm_flags = tm_flags; | |
61d8658b DC |
2334 | |
2335 | /* Default is to return a SCSI command when an error occurs */ | |
69ef2c69 | 2336 | io_req->return_scsi_cmd_on_abts = false; |
ade4fb94 | 2337 | io_req->tm_lun = tm_lun; |
61d8658b | 2338 | |
61d8658b DC |
2339 | /* Obtain exchange id */ |
2340 | xid = io_req->xid; | |
2341 | ||
2342 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = " | |
2343 | "0x%x\n", xid); | |
2344 | ||
2345 | /* Initialize task context for this IO request */ | |
2346 | task = qedf_get_task_mem(&qedf->tasks, xid); | |
61d8658b DC |
2347 | |
2348 | init_completion(&io_req->tm_done); | |
2349 | ||
61d8658b | 2350 | spin_lock_irqsave(&fcport->rport_lock, flags); |
61d8658b | 2351 | |
be086e7c MY |
2352 | sqe_idx = qedf_get_sqe_idx(fcport); |
2353 | sqe = &fcport->sq[sqe_idx]; | |
2354 | memset(sqe, 0, sizeof(struct fcoe_wqe)); | |
2355 | ||
2356 | qedf_init_task(fcport, lport, io_req, task, sqe); | |
61d8658b | 2357 | qedf_ring_doorbell(fcport); |
be086e7c | 2358 | |
61d8658b DC |
2359 | spin_unlock_irqrestore(&fcport->rport_lock, flags); |
2360 | ||
69ef2c69 | 2361 | set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); |
61d8658b DC |
2362 | tmo = wait_for_completion_timeout(&io_req->tm_done, |
2363 | QEDF_TM_TIMEOUT * HZ); | |
2364 | ||
2365 | if (!tmo) { | |
2366 | rc = FAILED; | |
2367 | QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n"); | |
69ef2c69 SK |
2368 | /* Clear outstanding bit since command timed out */ |
2369 | clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); | |
2370 | io_req->sc_cmd = NULL; | |
61d8658b DC |
2371 | } else { |
2372 | /* Check TMF response code */ | |
2373 | if (io_req->fcp_rsp_code == 0) | |
2374 | rc = SUCCESS; | |
2375 | else | |
2376 | rc = FAILED; | |
2377 | } | |
69ef2c69 SK |
2378 | /* |
2379 | * Double check that fcport has not gone into an uploading state before | |
2380 | * executing the command flush for the LUN/target. | |
2381 | */ | |
2382 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { | |
2383 | QEDF_ERR(&qedf->dbg_ctx, | |
2384 | "fcport is uploading, not executing flush.\n"); | |
2385 | goto no_flush; | |
2386 | } | |
2387 | /* We do not need this io_req any more */ | |
2388 | kref_put(&io_req->refcount, qedf_release_cmd); | |
2389 | ||
61d8658b DC |
2390 | |
2391 | if (tm_flags == FCP_TMF_LUN_RESET) | |
ade4fb94 | 2392 | qedf_flush_active_ios(fcport, tm_lun); |
61d8658b DC |
2393 | else |
2394 | qedf_flush_active_ios(fcport, -1); | |
2395 | ||
69ef2c69 | 2396 | no_flush: |
61d8658b DC |
2397 | if (rc != SUCCESS) { |
2398 | QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n"); | |
2399 | rc = FAILED; | |
2400 | } else { | |
2401 | QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n"); | |
2402 | rc = SUCCESS; | |
2403 | } | |
61d8658b DC |
2404 | return rc; |
2405 | } | |
2406 | ||
ade4fb94 | 2407 | int qedf_initiate_tmf(struct fc_rport *rport, u64 lun, u8 tm_flags) |
61d8658b | 2408 | { |
61d8658b DC |
2409 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
2410 | struct qedf_rport *fcport = (struct qedf_rport *)&rp[1]; | |
ade4fb94 HR |
2411 | struct qedf_ctx *qedf = fcport->qedf; |
2412 | struct fc_lport *lport = rp->local_port; | |
61d8658b | 2413 | int rc = SUCCESS; |
69ef2c69 | 2414 | struct fc_rport_priv *rdata = fcport->rdata; |
61d8658b | 2415 | |
69ef2c69 | 2416 | QEDF_ERR(NULL, |
ade4fb94 HR |
2417 | "tm_flags 0x%x target_id = 0x%x lun=%llu\n", |
2418 | tm_flags, rport->scsi_target_id, lun); | |
69ef2c69 SK |
2419 | |
2420 | if (!rdata || !kref_get_unless_zero(&rdata->kref)) { | |
2421 | QEDF_ERR(NULL, "stale rport\n"); | |
2422 | return FAILED; | |
2423 | } | |
2424 | ||
2425 | QEDF_ERR(NULL, "portid=%06x tm_flags =%s\n", rdata->ids.port_id, | |
2426 | (tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" : | |
2427 | "LUN RESET"); | |
61d8658b | 2428 | |
ade4fb94 | 2429 | rc = fc_block_rport(rport); |
69ef2c69 | 2430 | if (rc) |
fe2043d1 | 2431 | goto tmf_err; |
69ef2c69 | 2432 | |
69ef2c69 SK |
2433 | if (!qedf) { |
2434 | QEDF_ERR(NULL, "qedf is NULL.\n"); | |
2435 | rc = FAILED; | |
2436 | goto tmf_err; | |
2437 | } | |
2438 | ||
ff543e28 SS |
2439 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { |
2440 | QEDF_ERR(&qedf->dbg_ctx, "Connection is getting uploaded.\n"); | |
2441 | rc = SUCCESS; | |
2442 | goto tmf_err; | |
2443 | } | |
2444 | ||
61d8658b DC |
2445 | if (test_bit(QEDF_UNLOADING, &qedf->flags) || |
2446 | test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { | |
2447 | rc = SUCCESS; | |
2448 | goto tmf_err; | |
2449 | } | |
2450 | ||
2451 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { | |
2452 | QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); | |
2453 | rc = FAILED; | |
2454 | goto tmf_err; | |
2455 | } | |
2456 | ||
69ef2c69 | 2457 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { |
fe2043d1 SK |
2458 | if (!fcport->rdata) |
2459 | QEDF_ERR(&qedf->dbg_ctx, "fcport %p is uploading.\n", | |
2460 | fcport); | |
2461 | else | |
2462 | QEDF_ERR(&qedf->dbg_ctx, | |
2463 | "fcport %p port_id=%06x is uploading.\n", | |
2464 | fcport, fcport->rdata->ids.port_id); | |
69ef2c69 SK |
2465 | rc = FAILED; |
2466 | goto tmf_err; | |
2467 | } | |
2468 | ||
ade4fb94 | 2469 | rc = qedf_execute_tmf(fcport, lun, tm_flags); |
61d8658b DC |
2470 | |
2471 | tmf_err: | |
fe2043d1 | 2472 | kref_put(&rdata->kref, fc_rport_destroy); |
61d8658b DC |
2473 | return rc; |
2474 | } | |
2475 | ||
2476 | void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, | |
2477 | struct qedf_ioreq *io_req) | |
2478 | { | |
2479 | struct fcoe_cqe_rsp_info *fcp_rsp; | |
61d8658b | 2480 | |
69ef2c69 SK |
2481 | clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); |
2482 | ||
61d8658b DC |
2483 | fcp_rsp = &cqe->cqe_info.rsp_info; |
2484 | qedf_parse_fcp_rsp(io_req, fcp_rsp); | |
2485 | ||
61d8658b DC |
2486 | complete(&io_req->tm_done); |
2487 | } | |
2488 | ||
2489 | void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx, | |
2490 | struct fcoe_cqe *cqe) | |
2491 | { | |
2492 | unsigned long flags; | |
61d8658b DC |
2493 | uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len; |
2494 | u32 payload_len, crc; | |
2495 | struct fc_frame_header *fh; | |
2496 | struct fc_frame *fp; | |
2497 | struct qedf_io_work *io_work; | |
2498 | u32 bdq_idx; | |
2499 | void *bdq_addr; | |
da090917 | 2500 | struct scsi_bd *p_bd_info; |
61d8658b | 2501 | |
da090917 | 2502 | p_bd_info = &cqe->cqe_info.unsolic_info.bd_info; |
61d8658b | 2503 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, |
da090917 TT |
2504 | "address.hi=%x, address.lo=%x, opaque_data.hi=%x, opaque_data.lo=%x, bdq_prod_idx=%u, len=%u\n", |
2505 | le32_to_cpu(p_bd_info->address.hi), | |
2506 | le32_to_cpu(p_bd_info->address.lo), | |
2507 | le32_to_cpu(p_bd_info->opaque.fcoe_opaque.hi), | |
2508 | le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo), | |
2509 | qedf->bdq_prod_idx, pktlen); | |
2510 | ||
2511 | bdq_idx = le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo); | |
61d8658b DC |
2512 | if (bdq_idx >= QEDF_BDQ_SIZE) { |
2513 | QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n", | |
2514 | bdq_idx); | |
2515 | goto increment_prod; | |
2516 | } | |
2517 | ||
2518 | bdq_addr = qedf->bdq[bdq_idx].buf_addr; | |
2519 | if (!bdq_addr) { | |
2520 | QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping " | |
2521 | "unsolicited packet.\n"); | |
2522 | goto increment_prod; | |
2523 | } | |
2524 | ||
2525 | if (qedf_dump_frames) { | |
2526 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, | |
2527 | "BDQ frame is at addr=%p.\n", bdq_addr); | |
2528 | print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1, | |
2529 | (void *)bdq_addr, pktlen, false); | |
2530 | } | |
2531 | ||
2532 | /* Allocate frame */ | |
2533 | payload_len = pktlen - sizeof(struct fc_frame_header); | |
2534 | fp = fc_frame_alloc(qedf->lport, payload_len); | |
2535 | if (!fp) { | |
2536 | QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n"); | |
2537 | goto increment_prod; | |
2538 | } | |
2539 | ||
2540 | /* Copy data from BDQ buffer into fc_frame struct */ | |
2541 | fh = (struct fc_frame_header *)fc_frame_header_get(fp); | |
2542 | memcpy(fh, (void *)bdq_addr, pktlen); | |
2543 | ||
aa5175a8 SK |
2544 | QEDF_WARN(&qedf->dbg_ctx, |
2545 | "Processing Unsolicated frame, src=%06x dest=%06x r_ctl=0x%x type=0x%x cmd=%02x\n", | |
2546 | ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, | |
2547 | fh->fh_type, fc_frame_payload_op(fp)); | |
2548 | ||
61d8658b DC |
2549 | /* Initialize the frame so libfc sees it as a valid frame */ |
2550 | crc = fcoe_fc_crc(fp); | |
2551 | fc_frame_init(fp); | |
2552 | fr_dev(fp) = qedf->lport; | |
2553 | fr_sof(fp) = FC_SOF_I3; | |
2554 | fr_eof(fp) = FC_EOF_T; | |
2555 | fr_crc(fp) = cpu_to_le32(~crc); | |
2556 | ||
2557 | /* | |
2558 | * We need to return the frame back up to libfc in a non-atomic | |
2559 | * context | |
2560 | */ | |
2561 | io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC); | |
2562 | if (!io_work) { | |
2563 | QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate " | |
2564 | "work for I/O completion.\n"); | |
2565 | fc_frame_free(fp); | |
2566 | goto increment_prod; | |
2567 | } | |
2568 | memset(io_work, 0, sizeof(struct qedf_io_work)); | |
2569 | ||
2570 | INIT_WORK(&io_work->work, qedf_fp_io_handler); | |
2571 | ||
2572 | /* Copy contents of CQE for deferred processing */ | |
2573 | memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe)); | |
2574 | ||
2575 | io_work->qedf = qedf; | |
2576 | io_work->fp = fp; | |
2577 | ||
2578 | queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work); | |
2579 | increment_prod: | |
2580 | spin_lock_irqsave(&qedf->hba_lock, flags); | |
2581 | ||
2582 | /* Increment producer to let f/w know we've handled the frame */ | |
2583 | qedf->bdq_prod_idx++; | |
2584 | ||
2585 | /* Producer index wraps at uint16_t boundary */ | |
2586 | if (qedf->bdq_prod_idx == 0xffff) | |
2587 | qedf->bdq_prod_idx = 0; | |
2588 | ||
2589 | writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod); | |
50efc51c | 2590 | readw(qedf->bdq_primary_prod); |
61d8658b | 2591 | writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod); |
50efc51c | 2592 | readw(qedf->bdq_secondary_prod); |
61d8658b DC |
2593 | |
2594 | spin_unlock_irqrestore(&qedf->hba_lock, flags); | |
2595 | } |