1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * QLogic FCoE Offload Driver |
4 | * Copyright (c) 2016-2018 Cavium Inc. |
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(wq: qedf->timer_work_queue, dwork: &io_req->timeout_work, |
15 | delay: msecs_to_jiffies(m: 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); |
23 | struct qedf_ctx *qedf; |
24 | struct qedf_rport *fcport; |
25 | |
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 | |
34 | switch (io_req->cmd_type) { |
35 | case QEDF_ABTS: |
36 | if (qedf == NULL) { |
37 | QEDF_INFO(NULL, QEDF_LOG_IO, |
38 | "qedf is NULL for ABTS xid=0x%x.\n" , |
39 | io_req->xid); |
40 | return; |
41 | } |
42 | |
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, return_scsi_cmd_on_abts: 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(kref: &io_req->refcount, release: qedf_release_cmd); |
55 | |
56 | /* Clear in abort bit now that we're done with the command */ |
57 | clear_bit(QEDF_CMD_IN_ABORT, addr: &io_req->flags); |
58 | |
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: |
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, addr: &io_req->flags); |
74 | |
75 | kref_get(kref: &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); |
83 | qedf_initiate_cleanup(io_req, return_scsi_cmd_on_abts: true); |
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) { |
87 | io_req->cb_func(io_req->cb_arg); |
88 | io_req->cb_arg = NULL; |
89 | } |
90 | kref_put(kref: &io_req->refcount, release: 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, return_scsi_cmd_on_abts: true); |
96 | io_req->event = QEDF_IOREQ_EV_ELS_TMO; |
97 | qedf_process_seq_cleanup_compl(qedf, NULL, io_req); |
98 | break; |
99 | default: |
100 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
101 | "Hit default case, xid=0x%x.\n" , io_req->xid); |
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; |
111 | u16 min_xid = 0; |
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 */ |
120 | if (!cmgr->io_bdt_pool) { |
121 | QEDF_ERR(&qedf->dbg_ctx, "io_bdt_pool is NULL.\n" ); |
122 | goto free_cmd_pool; |
123 | } |
124 | |
125 | bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge); |
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(dev: &qedf->pdev->dev, size: bd_tbl_sz, |
130 | cpu_addr: bdt_info->bd_tbl, dma_handle: 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(objp: cmgr->io_bdt_pool[i]); |
138 | cmgr->io_bdt_pool[i] = NULL; |
139 | } |
140 | |
141 | kfree(objp: 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]; |
148 | kfree(objp: io_req->sgl_task_params); |
149 | kfree(objp: io_req->task_params); |
150 | /* Make sure we free per command sense buffer */ |
151 | if (io_req->sense_buffer) |
152 | dma_free_coherent(dev: &qedf->pdev->dev, |
153 | QEDF_SCSI_SENSE_BUFFERSIZE, cpu_addr: io_req->sense_buffer, |
154 | dma_handle: io_req->sense_buffer_dma); |
155 | cancel_delayed_work_sync(dwork: &io_req->rrq_work); |
156 | } |
157 | |
158 | /* Free command manager itself */ |
159 | vfree(addr: 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 | |
167 | atomic_set(v: &io_req->state, QEDFC_CMD_ST_RRQ_ACTIVE); |
168 | qedf_send_rrq(aborted_io_req: 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; |
180 | u16 min_xid = 0; |
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(size: 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 | /* |
210 | * Initialize I/O request fields. |
211 | */ |
212 | xid = 0; |
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(dev: &qedf->pdev->dev, |
224 | QEDF_SCSI_SENSE_BUFFERSIZE, dma_handle: &io_req->sense_buffer_dma, |
225 | GFP_KERNEL); |
226 | if (!io_req->sense_buffer) { |
227 | QEDF_ERR(&qedf->dbg_ctx, |
228 | "Failed to alloc sense buffer.\n" ); |
229 | goto mem_err; |
230 | } |
231 | |
232 | /* Allocate task parameters to pass to f/w init funcions */ |
233 | io_req->task_params = kzalloc(size: 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 | size: 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 | } |
254 | } |
255 | |
256 | /* Allocate pool of io_bdts - one for each qedf_ioreq */ |
257 | cmgr->io_bdt_pool = kmalloc_array(n: num_ios, size: 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(size: sizeof(struct io_bdt), |
267 | GFP_KERNEL); |
268 | if (!cmgr->io_bdt_pool[i]) { |
269 | QEDF_WARN(&(qedf->dbg_ctx), |
270 | "Failed to alloc io_bdt_pool[%d].\n" , i); |
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(dev: &qedf->pdev->dev, |
278 | QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge), |
279 | dma_handle: &bdt_info->bd_tbl_dma, GFP_KERNEL); |
280 | if (!bdt_info->bd_tbl) { |
281 | QEDF_WARN(&(qedf->dbg_ctx), |
282 | "Failed to alloc bdt_tbl[%d].\n" , i); |
283 | goto mem_err; |
284 | } |
285 | } |
286 | atomic_set(v: &cmgr->free_list_cnt, i: 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(v: &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(v: &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(v: &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 */ |
343 | if (!io_req->alloc) |
344 | break; |
345 | } |
346 | |
347 | if (i == FCOE_PARAMS_NUM_TASKS) { |
348 | spin_unlock_irqrestore(lock: &cmd_mgr->lock, flags); |
349 | goto out_failed; |
350 | } |
351 | |
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 | |
357 | /* Clear any flags now that we've reallocated the xid */ |
358 | io_req->flags = 0; |
359 | io_req->alloc = 1; |
360 | spin_unlock_irqrestore(lock: &cmd_mgr->lock, flags); |
361 | |
362 | atomic_inc(v: &fcport->num_active_ios); |
363 | atomic_dec(v: &fcport->free_sqes); |
364 | xid = io_req->xid; |
365 | atomic_dec(v: &cmd_mgr->free_list_cnt); |
366 | |
367 | io_req->cmd_mgr = cmd_mgr; |
368 | io_req->fcport = fcport; |
369 | |
370 | /* Clear any stale sc_cmd back pointer */ |
371 | io_req->sc_cmd = NULL; |
372 | io_req->lun = -1; |
373 | |
374 | /* Hold the io_req against deletion */ |
375 | kref_init(kref: &io_req->refcount); /* ID: 001 */ |
376 | atomic_set(v: &io_req->state, QEDFC_CMD_ST_IO_ACTIVE); |
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(kref: &io_req->refcount, release: qedf_release_cmd); |
384 | goto out_failed; |
385 | } |
386 | bd_tbl->io_req = io_req; |
387 | io_req->cmd_type = cmd_type; |
388 | io_req->tm_flags = 0; |
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; |
407 | uint64_t sz = sizeof(struct scsi_sge); |
408 | |
409 | /* clear tm flags */ |
410 | if (mp_req->mp_req_bd) { |
411 | dma_free_coherent(dev: &qedf->pdev->dev, size: sz, |
412 | cpu_addr: mp_req->mp_req_bd, dma_handle: 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(dev: &qedf->pdev->dev, size: sz, |
417 | cpu_addr: mp_req->mp_resp_bd, dma_handle: mp_req->mp_resp_bd_dma); |
418 | mp_req->mp_resp_bd = NULL; |
419 | } |
420 | if (mp_req->req_buf) { |
421 | dma_free_coherent(dev: &qedf->pdev->dev, QEDF_PAGE_SIZE, |
422 | cpu_addr: mp_req->req_buf, dma_handle: mp_req->req_buf_dma); |
423 | mp_req->req_buf = NULL; |
424 | } |
425 | if (mp_req->resp_buf) { |
426 | dma_free_coherent(dev: &qedf->pdev->dev, QEDF_PAGE_SIZE, |
427 | cpu_addr: mp_req->resp_buf, dma_handle: 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; |
438 | unsigned long flags; |
439 | |
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); |
444 | WARN_ON(io_req->sc_cmd); |
445 | } |
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(v: &cmd_mgr->free_list_cnt); |
452 | atomic_dec(v: &fcport->num_active_ios); |
453 | atomic_set(v: &io_req->state, QEDF_CMD_ST_INACTIVE); |
454 | if (atomic_read(v: &fcport->num_active_ios) < 0) { |
455 | QEDF_WARN(&(fcport->qedf->dbg_ctx), "active_ios < 0.\n" ); |
456 | WARN_ON(1); |
457 | } |
458 | |
459 | /* Increment task retry identifier now that the request is released */ |
460 | io_req->task_retry_identifier++; |
461 | io_req->fcport = NULL; |
462 | |
463 | clear_bit(QEDF_CMD_DIRTY, addr: &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(lock: &cmd_mgr->lock, flags); |
469 | } |
470 | |
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(shost: host); |
476 | struct qedf_ctx *qedf = lport_priv(lport); |
477 | struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; |
478 | struct scatterlist *sg; |
479 | int byte_count = 0; |
480 | int sg_count = 0; |
481 | int bd_count = 0; |
482 | u32 sg_len; |
483 | u64 addr; |
484 | int i = 0; |
485 | |
486 | sg_count = dma_map_sg(&qedf->pdev->dev, scsi_sglist(sc), |
487 | scsi_sg_count(sc), sc->sc_data_direction); |
488 | sg = scsi_sglist(cmd: sc); |
489 | |
490 | io_req->sge_type = QEDF_IOREQ_UNKNOWN_SGE; |
491 | |
492 | if (sg_count <= 8 || io_req->io_req_flags == QEDF_READ) |
493 | io_req->sge_type = QEDF_IOREQ_FAST_SGE; |
494 | |
495 | scsi_for_each_sg(sc, sg, sg_count, i) { |
496 | sg_len = (u32)sg_dma_len(sg); |
497 | addr = (u64)sg_dma_address(sg); |
498 | |
499 | /* |
500 | * Intermediate s/g element so check if start address |
501 | * is page aligned. Only required for writes and only if the |
502 | * number of scatter/gather elements is 8 or more. |
503 | */ |
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; |
507 | |
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); |
511 | |
512 | bd_count++; |
513 | byte_count += sg_len; |
514 | } |
515 | |
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 | |
520 | if (byte_count != scsi_bufflen(cmd: 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; |
531 | struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; |
532 | int bd_count; |
533 | |
534 | if (scsi_sg_count(cmd: 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; |
541 | bd[0].sge_len = 0; |
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, |
549 | struct fcp_cmnd *fcp_cmnd) |
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 */ |
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); |
563 | |
564 | /* 4 bytes: flag info */ |
565 | fcp_cmnd->fc_pri_ta = 0; |
566 | fcp_cmnd->fc_tm_flags = io_req->tm_flags; |
567 | fcp_cmnd->fc_flags = io_req->io_req_flags; |
568 | fcp_cmnd->fc_cmdref = 0; |
569 | |
570 | /* Populate data direction */ |
571 | if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { |
572 | fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; |
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 | } |
579 | |
580 | fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; |
581 | |
582 | /* 16 bytes: CDB information */ |
583 | if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) |
584 | memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); |
585 | |
586 | /* 4 bytes: FCP data length */ |
587 | fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); |
588 | } |
589 | |
590 | static void qedf_init_task(struct qedf_rport *fcport, struct fc_lport *lport, |
591 | struct qedf_ioreq *io_req, struct fcoe_task_context *task_ctx, |
592 | struct fcoe_wqe *sqe) |
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; |
597 | u8 fcp_cmnd[32]; |
598 | u32 tmp_fcp_cmnd[8]; |
599 | int bd_count = 0; |
600 | struct qedf_ctx *qedf = fcport->qedf; |
601 | uint16_t cq_idx = smp_processor_id() % qedf->num_queues; |
602 | struct regpair sense_data_buffer_phys_addr; |
603 | u32 tx_io_size = 0; |
604 | u32 rx_io_size = 0; |
605 | int i, cnt; |
606 | |
607 | /* Note init_initiator_rw_fcoe_task memsets the task context */ |
608 | io_req->task = task_ctx; |
609 | memset(task_ctx, 0, sizeof(struct fcoe_task_context)); |
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)); |
612 | |
613 | /* Set task type bassed on DMA directio of command */ |
614 | if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { |
615 | task_type = FCOE_TASK_TYPE_READ_INITIATOR; |
616 | } else { |
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; |
620 | } else { |
621 | task_type = FCOE_TASK_TYPE_READ_INITIATOR; |
622 | rx_io_size = io_req->data_xfer_len; |
623 | } |
624 | } |
625 | |
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(cmd: io_req->sc_cmd); |
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; |
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 | |
658 | /* fill FCP_CMND IU */ |
659 | qedf_build_fcp_cmnd(io_req, fcp_cmnd: (struct fcp_cmnd *)tmp_fcp_cmnd); |
660 | |
661 | /* Swap fcp_cmnd since FC is big endian */ |
662 | cnt = sizeof(struct fcp_cmnd) / sizeof(u32); |
663 | for (i = 0; i < cnt; i++) { |
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(task_params: io_req->task_params, |
669 | sgl_task_params: io_req->sgl_task_params, |
670 | sense_data_buffer_phys_addr, |
671 | task_retry_id: io_req->task_retry_identifier, fcp_cmd_payload: fcp_cmnd); |
672 | |
673 | /* Increment SGL type counters */ |
674 | if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) |
675 | qedf->slow_sge_ios++; |
676 | else |
677 | qedf->fast_sge_ios++; |
678 | } |
679 | |
680 | void qedf_init_mp_task(struct qedf_ioreq *io_req, |
681 | struct fcoe_task_context *task_ctx, struct fcoe_wqe *sqe) |
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; |
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; |
690 | |
691 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, |
692 | "Initializing MP task for cmd_type=%d\n" , |
693 | io_req->cmd_type); |
694 | |
695 | qedf->control_requests++; |
696 | |
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)); |
699 | memset(task_ctx, 0, sizeof(struct fcoe_task_context)); |
700 | memset(&task_fc_hdr, 0, sizeof(struct fcoe_tx_mid_path_params)); |
701 | |
702 | /* Setup the task from io_req for easy reference */ |
703 | io_req->task = task_ctx; |
704 | |
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; |
749 | |
750 | |
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(task_params: io_req->task_params, |
756 | mid_path_fc_header: &task_fc_hdr, |
757 | tx_sgl_task_params: &tx_sgl_task_params, |
758 | rx_sgl_task_params: &rx_sgl_task_params, fw_to_place_fc_header: 0); |
759 | } |
760 | |
761 | /* Presumed that fcport->rport_lock is held */ |
762 | u16 qedf_get_sqe_idx(struct qedf_rport *fcport) |
763 | { |
764 | uint16_t total_sqe = (fcport->sq_mem_size)/(sizeof(struct fcoe_wqe)); |
765 | u16 rval; |
766 | |
767 | rval = fcport->sq_prod_idx; |
768 | |
769 | /* Adjust ring index */ |
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 | |
775 | return rval; |
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; |
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(); |
795 | writel(val: *(u32 *)&dbell, addr: fcport->p_doorbell); |
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 | */ |
801 | wmb(); |
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; |
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; |
819 | io_log->op = sc_cmd->cmnd[0]; |
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(cmd: sc_cmd); |
825 | io_log->sg_count = scsi_sg_count(cmd: sc_cmd); |
826 | io_log->result = sc_cmd->result; |
827 | io_log->jiffies = jiffies; |
828 | io_log->refcount = kref_read(kref: &io_req->refcount); |
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(lock: &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(shost: host); |
855 | struct qedf_ctx *qedf = lport_priv(lport); |
856 | struct fcoe_task_context *task_ctx; |
857 | u16 xid; |
858 | struct fcoe_wqe *sqe; |
859 | u16 sqe_idx; |
860 | |
861 | /* Initialize rest of io_req fileds */ |
862 | io_req->data_xfer_len = scsi_bufflen(cmd: sc_cmd); |
863 | qedf_priv(cmd: sc_cmd)->io_req = io_req; |
864 | io_req->sge_type = QEDF_IOREQ_FAST_SGE; /* Assume fast SGL by default */ |
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) { |
870 | io_req->io_req_flags = QEDF_READ; |
871 | qedf->input_requests++; |
872 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { |
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" ); |
885 | /* Release cmd will release io_req, but sc_cmd is assigned */ |
886 | io_req->sc_cmd = NULL; |
887 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
888 | return -EAGAIN; |
889 | } |
890 | |
891 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || |
892 | test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { |
893 | QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n" ); |
894 | /* Release cmd will release io_req, but sc_cmd is assigned */ |
895 | io_req->sc_cmd = NULL; |
896 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
897 | return -EINVAL; |
898 | } |
899 | |
900 | /* Record LUN number for later use if we need them */ |
901 | io_req->lun = (int)sc_cmd->device->lun; |
902 | |
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 | |
908 | /* Get the task context */ |
909 | task_ctx = qedf_get_task_mem(info: &qedf->tasks, tid: xid); |
910 | if (!task_ctx) { |
911 | QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n" , |
912 | xid); |
913 | /* Release cmd will release io_req, but sc_cmd is assigned */ |
914 | io_req->sc_cmd = NULL; |
915 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
916 | return -EINVAL; |
917 | } |
918 | |
919 | qedf_init_task(fcport, lport, io_req, task_ctx, sqe); |
920 | |
921 | /* Ring doorbell */ |
922 | qedf_ring_doorbell(fcport); |
923 | |
924 | /* Set that command is with the firmware now */ |
925 | set_bit(QEDF_CMD_OUTSTANDING, addr: &io_req->flags); |
926 | |
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(shost: 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; |
940 | struct qedf_rport *fcport; |
941 | struct qedf_ioreq *io_req; |
942 | int rc = 0; |
943 | int rval; |
944 | unsigned long flags = 0; |
945 | int num_sgs = 0; |
946 | |
947 | num_sgs = scsi_sg_count(cmd: sc_cmd); |
948 | if (scsi_sg_count(cmd: 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; |
953 | scsi_done(cmd: sc_cmd); |
954 | return 0; |
955 | } |
956 | |
957 | if (test_bit(QEDF_UNLOADING, &qedf->flags) || |
958 | test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { |
959 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
960 | "Returning DNC as unloading or stop io, flags 0x%lx.\n" , |
961 | qedf->flags); |
962 | sc_cmd->result = DID_NO_CONNECT << 16; |
963 | scsi_done(cmd: sc_cmd); |
964 | return 0; |
965 | } |
966 | |
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; |
972 | scsi_done(cmd: sc_cmd); |
973 | return 0; |
974 | } |
975 | |
976 | rval = fc_remote_port_chkready(rport); |
977 | if (rval) { |
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); |
981 | sc_cmd->result = rval; |
982 | scsi_done(cmd: sc_cmd); |
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)) { |
988 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Drain active.\n" ); |
989 | rc = SCSI_MLQUEUE_HOST_BUSY; |
990 | goto exit_qcmd; |
991 | } |
992 | |
993 | if (lport->state != LPORT_ST_READY || |
994 | atomic_read(v: &qedf->link_state) != QEDF_LINK_UP) { |
995 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Link down.\n" ); |
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 | |
1003 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || |
1004 | test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { |
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 | } |
1012 | |
1013 | atomic_inc(v: &fcport->ios_to_queue); |
1014 | |
1015 | if (fcport->retry_delay_timestamp) { |
1016 | /* Take fcport->rport_lock for resetting the delay_timestamp */ |
1017 | spin_lock_irqsave(&fcport->rport_lock, flags); |
1018 | if (time_after(jiffies, fcport->retry_delay_timestamp)) { |
1019 | fcport->retry_delay_timestamp = 0; |
1020 | } else { |
1021 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
1022 | /* If retry_delay timer is active, flow off the ML */ |
1023 | rc = SCSI_MLQUEUE_TARGET_BUSY; |
1024 | atomic_dec(v: &fcport->ios_to_queue); |
1025 | goto exit_qcmd; |
1026 | } |
1027 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
1028 | } |
1029 | |
1030 | io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD); |
1031 | if (!io_req) { |
1032 | rc = SCSI_MLQUEUE_HOST_BUSY; |
1033 | atomic_dec(v: &fcport->ios_to_queue); |
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(v: &fcport->free_sqes); |
1045 | rc = SCSI_MLQUEUE_HOST_BUSY; |
1046 | } |
1047 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
1048 | atomic_dec(v: &fcport->ios_to_queue); |
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; |
1071 | io_req->cdb_status = fcp_rsp->scsi_status_code; |
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 | |
1101 | /* The sense buffer can be NULL for TMF commands */ |
1102 | if (sc_cmd && sc_cmd->sense_buffer) { |
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 | } |
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(cmd: 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 | { |
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; |
1130 | unsigned long flags = 0; |
1131 | u16 chk_scope = 0; |
1132 | |
1133 | if (!io_req) |
1134 | return; |
1135 | if (!cqe) |
1136 | return; |
1137 | |
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 | |
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 | |
1155 | if (!qedf_priv(cmd: sc_cmd)->io_req) { |
1156 | QEDF_WARN(&(qedf->dbg_ctx), |
1157 | "io_req is NULL, returned in another context.\n" ); |
1158 | return; |
1159 | } |
1160 | |
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 | |
1167 | if (!scsi_cmd_to_rq(scmd: sc_cmd)->q) { |
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 | |
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 | |
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) { |
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]); |
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 | |
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(cmd: sc_cmd, resid: scsi_bufflen(cmd: 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 { |
1231 | refcount = kref_read(kref: &io_req->refcount); |
1232 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, |
1233 | "%d:0:%d:%lld xid=0x%0x op=0x%02x " |
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 | |
1257 | if (qedf_retry_delay) |
1258 | chk_scope = 1; |
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++; |
1265 | } |
1266 | } |
1267 | if (io_req->fcp_resid) |
1268 | scsi_set_resid(cmd: sc_cmd, resid: io_req->fcp_resid); |
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(lock: &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 | } |
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 | |
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, addr: &io_req->flags); |
1315 | |
1316 | io_req->sc_cmd = NULL; |
1317 | qedf_priv(cmd: sc_cmd)->io_req = NULL; |
1318 | scsi_done(cmd: sc_cmd); |
1319 | kref_put(kref: &io_req->refcount, release: 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 | { |
1326 | struct scsi_cmnd *sc_cmd; |
1327 | int refcount; |
1328 | |
1329 | if (!io_req) { |
1330 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "io_req is NULL\n" ); |
1331 | return; |
1332 | } |
1333 | |
1334 | if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, addr: &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, addr: &io_req->flags); |
1346 | |
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 | |
1354 | if (!virt_addr_valid(sc_cmd)) { |
1355 | QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid." , sc_cmd); |
1356 | goto bad_scsi_ptr; |
1357 | } |
1358 | |
1359 | if (!qedf_priv(cmd: sc_cmd)->io_req) { |
1360 | QEDF_WARN(&(qedf->dbg_ctx), |
1361 | "io_req is NULL, returned in another context.\n" ); |
1362 | return; |
1363 | } |
1364 | |
1365 | if (!sc_cmd->device) { |
1366 | QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n" , |
1367 | sc_cmd); |
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 | |
1391 | qedf_unmap_sg_list(qedf, io_req); |
1392 | |
1393 | sc_cmd->result = result << 16; |
1394 | refcount = kref_read(kref: &io_req->refcount); |
1395 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing " |
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(cmd: sc_cmd, resid: scsi_bufflen(cmd: sc_cmd)); |
1409 | |
1410 | if (qedf_io_tracing) |
1411 | qedf_trace_io(fcport: io_req->fcport, io_req, QEDF_IO_TRACE_RSP); |
1412 | |
1413 | io_req->sc_cmd = NULL; |
1414 | qedf_priv(cmd: sc_cmd)->io_req = NULL; |
1415 | scsi_done(cmd: sc_cmd); |
1416 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
1417 | return; |
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(kref: &io_req->refcount, release: qedf_release_cmd); /* ID: 001 */ |
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 | |
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); |
1444 | return; |
1445 | } |
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(orig_io_req: 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(x: &io_req->abts_done); |
1496 | rval = qedf_initiate_abts(io_req, return_scsi_cmd_on_abts: 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 | |
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 | |
1517 | if (!cqe) { |
1518 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
1519 | "cqe is NULL for io_req %p\n" , io_req); |
1520 | return; |
1521 | } |
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 | |
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 | |
1545 | if (qedf->stop_io_on_error) { |
1546 | qedf_stop_all_io(qedf); |
1547 | return; |
1548 | } |
1549 | |
1550 | init_completion(x: &io_req->abts_done); |
1551 | rval = qedf_initiate_abts(io_req, return_scsi_cmd_on_abts: 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, |
1561 | kref_read(&els_req->refcount)); |
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 | |
1569 | clear_bit(QEDF_CMD_OUTSTANDING, addr: &els_req->flags); |
1570 | |
1571 | /* Cancel the timer */ |
1572 | cancel_delayed_work_sync(dwork: &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(kref: &els_req->refcount, release: 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 | */ |
1587 | void qedf_flush_active_ios(struct qedf_rport *fcport, u64 lun) |
1588 | { |
1589 | struct qedf_ioreq *io_req; |
1590 | struct qedf_ctx *qedf; |
1591 | struct qedf_cmd_mgr *cmd_mgr; |
1592 | int i, rc; |
1593 | unsigned long flags; |
1594 | int flush_cnt = 0; |
1595 | int wait_cnt = 100; |
1596 | int refcount = 0; |
1597 | |
1598 | if (!fcport) { |
1599 | QEDF_ERR(NULL, "fcport is NULL\n" ); |
1600 | return; |
1601 | } |
1602 | |
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 | |
1609 | qedf = fcport->qedf; |
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(v: &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(msecs: 20); |
1629 | wait_cnt--; |
1630 | } |
1631 | } |
1632 | |
1633 | cmd_mgr = qedf->cmd_mgr; |
1634 | |
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, addr: &fcport->flags); |
1644 | } else { |
1645 | set_bit(QEDF_RPORT_IN_LUN_RESET, addr: &fcport->flags); |
1646 | fcport->lun_reset_lun = lun; |
1647 | } |
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; |
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(lock: &cmd_mgr->lock, flags); |
1667 | } else { |
1668 | spin_unlock_irqrestore(lock: &cmd_mgr->lock, flags); |
1669 | continue; |
1670 | } |
1671 | |
1672 | if (io_req->fcport != fcport) |
1673 | continue; |
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(kref: &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); |
1685 | /* If RRQ work has been queue, try to cancel it and |
1686 | * free the io_req |
1687 | */ |
1688 | if (atomic_read(v: &io_req->state) == |
1689 | QEDFC_CMD_ST_RRQ_WAIT) { |
1690 | if (cancel_delayed_work_sync |
1691 | (dwork: &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(kref: &io_req->refcount, |
1697 | release: qedf_release_cmd); |
1698 | } |
1699 | } |
1700 | continue; |
1701 | } |
1702 | |
1703 | /* Only consider flushing ELS during target reset */ |
1704 | if (io_req->cmd_type == QEDF_ELS && |
1705 | lun == -1) { |
1706 | rc = kref_get_unless_zero(kref: &io_req->refcount); |
1707 | if (!rc) { |
1708 | QEDF_ERR(&(qedf->dbg_ctx), |
1709 | "Could not get kref for ELS io_req=0x%p xid=0x%x.\n" , |
1710 | io_req, io_req->xid); |
1711 | continue; |
1712 | } |
1713 | qedf_initiate_cleanup(io_req, return_scsi_cmd_on_abts: false); |
1714 | flush_cnt++; |
1715 | qedf_flush_els_req(qedf, els_req: io_req); |
1716 | |
1717 | /* |
1718 | * Release the kref and go back to the top of the |
1719 | * loop. |
1720 | */ |
1721 | goto free_cmd; |
1722 | } |
1723 | |
1724 | if (io_req->cmd_type == QEDF_ABTS) { |
1725 | /* ID: 004 */ |
1726 | rc = kref_get_unless_zero(kref: &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 | } |
1733 | if (lun != -1 && io_req->lun != lun) |
1734 | goto free_cmd; |
1735 | |
1736 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
1737 | "Flushing abort xid=0x%x.\n" , io_req->xid); |
1738 | |
1739 | if (cancel_delayed_work_sync(dwork: &io_req->rrq_work)) { |
1740 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
1741 | "Putting ref for cancelled RRQ work xid=0x%x.\n" , |
1742 | io_req->xid); |
1743 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
1744 | } |
1745 | |
1746 | if (cancel_delayed_work_sync(dwork: &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, return_scsi_cmd_on_abts: 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, addr: &io_req->flags); |
1756 | /* ID: 002 */ |
1757 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
1758 | } |
1759 | flush_cnt++; |
1760 | goto free_cmd; |
1761 | } |
1762 | |
1763 | if (!io_req->sc_cmd) |
1764 | continue; |
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, return_scsi_cmd_on_abts: false); |
1772 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
1773 | continue; |
1774 | } |
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(kref: &io_req->refcount); |
1781 | if (!rc) { |
1782 | QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for " |
1783 | "io_req=0x%p xid=0x%x\n" , io_req, io_req->xid); |
1784 | continue; |
1785 | } |
1786 | |
1787 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, |
1788 | "Cleanup xid=0x%x.\n" , io_req->xid); |
1789 | flush_cnt++; |
1790 | |
1791 | /* Cleanup task and return I/O mid-layer */ |
1792 | qedf_initiate_cleanup(io_req, return_scsi_cmd_on_abts: true); |
1793 | |
1794 | free_cmd: |
1795 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); /* ID: 004 */ |
1796 | } |
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(v: &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(kref: &io_req->refcount); |
1822 | set_bit(QEDF_CMD_DIRTY, |
1823 | addr: &io_req->flags); |
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(msecs: 500); |
1837 | wait_cnt--; |
1838 | } |
1839 | } |
1840 | |
1841 | clear_bit(QEDF_RPORT_IN_LUN_RESET, addr: &fcport->flags); |
1842 | clear_bit(QEDF_RPORT_IN_TARGET_RESET, addr: &fcport->flags); |
1843 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n" ); |
1844 | mutex_unlock(lock: &qedf->flush_mutex); |
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; |
1855 | struct fc_rport_priv *rdata; |
1856 | struct qedf_ctx *qedf; |
1857 | u16 xid; |
1858 | int rc = 0; |
1859 | unsigned long flags; |
1860 | struct fcoe_wqe *sqe; |
1861 | u16 sqe_idx; |
1862 | int refcount = 0; |
1863 | |
1864 | /* Sanity check qedf_rport before dereferencing any pointers */ |
1865 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { |
1866 | QEDF_ERR(NULL, "tgt not offloaded\n" ); |
1867 | rc = 1; |
1868 | goto out; |
1869 | } |
1870 | |
1871 | qedf = fcport->qedf; |
1872 | rdata = fcport->rdata; |
1873 | |
1874 | if (!rdata || !kref_get_unless_zero(kref: &rdata->kref)) { |
1875 | QEDF_ERR(&qedf->dbg_ctx, "stale rport\n" ); |
1876 | rc = 1; |
1877 | goto out; |
1878 | } |
1879 | |
1880 | lport = qedf->lport; |
1881 | |
1882 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { |
1883 | QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n" ); |
1884 | rc = 1; |
1885 | goto drop_rdata_kref; |
1886 | } |
1887 | |
1888 | if (atomic_read(v: &qedf->link_down_tmo_valid) > 0) { |
1889 | QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n" ); |
1890 | rc = 1; |
1891 | goto drop_rdata_kref; |
1892 | } |
1893 | |
1894 | /* Ensure room on SQ */ |
1895 | if (!atomic_read(v: &fcport->free_sqes)) { |
1896 | QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n" ); |
1897 | rc = 1; |
1898 | goto drop_rdata_kref; |
1899 | } |
1900 | |
1901 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { |
1902 | QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n" ); |
1903 | rc = 1; |
1904 | goto drop_rdata_kref; |
1905 | } |
1906 | |
1907 | spin_lock_irqsave(&fcport->rport_lock, flags); |
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)) { |
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); |
1914 | rc = 1; |
1915 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
1916 | goto drop_rdata_kref; |
1917 | } |
1918 | |
1919 | /* Set the command type to abort */ |
1920 | io_req->cmd_type = QEDF_ABTS; |
1921 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
1922 | |
1923 | kref_get(kref: &io_req->refcount); |
1924 | |
1925 | xid = io_req->xid; |
1926 | qedf->control_requests++; |
1927 | qedf->packet_aborts++; |
1928 | |
1929 | io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; |
1930 | |
1931 | set_bit(QEDF_CMD_IN_ABORT, addr: &io_req->flags); |
1932 | refcount = kref_read(kref: &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); |
1936 | |
1937 | qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT); |
1938 | |
1939 | spin_lock_irqsave(&fcport->rport_lock, flags); |
1940 | |
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; |
1945 | |
1946 | init_initiator_abort_fcoe_task(task_params: io_req->task_params); |
1947 | qedf_ring_doorbell(fcport); |
1948 | |
1949 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
1950 | |
1951 | drop_rdata_kref: |
1952 | kref_put(kref: &rdata->kref, release: fc_rport_destroy); |
1953 | out: |
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; |
1961 | int rc; |
1962 | struct qedf_rport *fcport = io_req->fcport; |
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 | |
1967 | r_ctl = cqe->cqe_info.abts_info.r_ctl; |
1968 | |
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(dwork: &io_req->timeout_work)) { |
1993 | QEDF_ERR(&qedf->dbg_ctx, |
1994 | "Wasn't able to cancel abts timeout work.\n" ); |
1995 | } |
1996 | |
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; |
2002 | rc = kref_get_unless_zero(kref: &io_req->refcount); /* ID: 003 */ |
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 | } |
2009 | /* |
2010 | * Dont release this cmd yet. It will be relesed |
2011 | * after we get RRQ response |
2012 | */ |
2013 | queue_delayed_work(wq: qedf->dpc_wq, dwork: &io_req->rrq_work, |
2014 | delay: msecs_to_jiffies(m: qedf->lport->r_a_tov)); |
2015 | atomic_set(v: &io_req->state, QEDFC_CMD_ST_RRQ_WAIT); |
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, addr: &io_req->flags); |
2029 | |
2030 | if (io_req->sc_cmd) { |
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); |
2035 | if (io_req->return_scsi_cmd_on_abts) |
2036 | qedf_scsi_done(qedf, io_req, result: DID_ERROR); |
2037 | } |
2038 | |
2039 | /* Notify eh_abort handler that ABTS is complete */ |
2040 | complete(&io_req->abts_done); |
2041 | |
2042 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
2043 | } |
2044 | |
2045 | int qedf_init_mp_req(struct qedf_ioreq *io_req) |
2046 | { |
2047 | struct qedf_mp_req *mp_req; |
2048 | struct scsi_sge *mp_req_bd; |
2049 | struct scsi_sge *mp_resp_bd; |
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(dev: &qedf->pdev->dev, QEDF_PAGE_SIZE, |
2066 | dma_handle: &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(dev: &qedf->pdev->dev, |
2074 | QEDF_PAGE_SIZE, dma_handle: &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 */ |
2083 | sz = sizeof(struct scsi_sge); |
2084 | mp_req->mp_req_bd = dma_alloc_coherent(dev: &qedf->pdev->dev, size: sz, |
2085 | dma_handle: &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(dev: &qedf->pdev->dev, size: sz, |
2093 | dma_handle: &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); |
2105 | mp_req_bd->sge_len = QEDF_PAGE_SIZE; |
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); |
2116 | mp_resp_bd->sge_len = QEDF_PAGE_SIZE; |
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, addr: &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(msecs: 100); |
2140 | |
2141 | /* Unplug and continue */ |
2142 | clear_bit(QEDF_DRAIN_ACTIVE, addr: &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; |
2154 | int tmo = 0; |
2155 | int rc = SUCCESS; |
2156 | unsigned long flags; |
2157 | struct fcoe_wqe *sqe; |
2158 | u16 sqe_idx; |
2159 | int refcount = 0; |
2160 | |
2161 | fcport = io_req->fcport; |
2162 | if (!fcport) { |
2163 | QEDF_ERR(NULL, "fcport is NULL.\n" ); |
2164 | return SUCCESS; |
2165 | } |
2166 | |
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" ); |
2170 | return SUCCESS; |
2171 | } |
2172 | |
2173 | qedf = fcport->qedf; |
2174 | if (!qedf) { |
2175 | QEDF_ERR(NULL, "qedf is NULL.\n" ); |
2176 | return SUCCESS; |
2177 | } |
2178 | |
2179 | if (io_req->cmd_type == QEDF_ELS) { |
2180 | goto process_els; |
2181 | } |
2182 | |
2183 | if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || |
2184 | test_and_set_bit(QEDF_CMD_IN_CLEANUP, addr: &io_req->flags)) { |
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 | } |
2190 | set_bit(QEDF_CMD_IN_CLEANUP, addr: &io_req->flags); |
2191 | |
2192 | process_els: |
2193 | /* Ensure room on SQ */ |
2194 | if (!atomic_read(v: &fcport->free_sqes)) { |
2195 | QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n" ); |
2196 | /* Need to make sure we clear the flag since it was set */ |
2197 | clear_bit(QEDF_CMD_IN_CLEANUP, addr: &io_req->flags); |
2198 | return FAILED; |
2199 | } |
2200 | |
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, addr: &io_req->flags); |
2206 | return SUCCESS; |
2207 | } |
2208 | |
2209 | refcount = kref_read(kref: &io_req->refcount); |
2210 | |
2211 | QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, |
2212 | "Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n" , |
2213 | io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags, |
2214 | refcount, fcport, fcport->rdata->ids.port_id); |
2215 | |
2216 | /* Cleanup cmds re-use the same TID as the original I/O */ |
2217 | spin_lock_irqsave(&fcport->rport_lock, flags); |
2218 | io_req->cmd_type = QEDF_CLEANUP; |
2219 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
2220 | io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; |
2221 | |
2222 | init_completion(x: &io_req->cleanup_done); |
2223 | |
2224 | spin_lock_irqsave(&fcport->rport_lock, flags); |
2225 | |
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(task_params: io_req->task_params); |
2232 | qedf_ring_doorbell(fcport); |
2233 | |
2234 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
2235 | |
2236 | tmo = wait_for_completion_timeout(x: &io_req->cleanup_done, |
2237 | QEDF_CLEANUP_TIMEOUT * HZ); |
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, addr: &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 | |
2250 | /* If it TASK MGMT handle it, reference will be decreased |
2251 | * in qedf_execute_tmf |
2252 | */ |
2253 | if (io_req->tm_flags == FCP_TMF_LUN_RESET || |
2254 | io_req->tm_flags == FCP_TMF_TGT_RESET) { |
2255 | clear_bit(QEDF_CMD_OUTSTANDING, addr: &io_req->flags); |
2256 | io_req->sc_cmd = NULL; |
2257 | kref_put(kref: &io_req->refcount, release: qedf_release_cmd); |
2258 | complete(&io_req->tm_done); |
2259 | } |
2260 | |
2261 | if (io_req->sc_cmd) { |
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); |
2266 | if (io_req->return_scsi_cmd_on_abts) |
2267 | qedf_scsi_done(qedf, io_req, result: 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, addr: &io_req->flags); |
2285 | |
2286 | /* Complete so we can finish cleaning up the I/O */ |
2287 | complete(&io_req->cleanup_done); |
2288 | } |
2289 | |
2290 | static int qedf_execute_tmf(struct qedf_rport *fcport, u64 tm_lun, |
2291 | uint8_t tm_flags) |
2292 | { |
2293 | struct qedf_ioreq *io_req; |
2294 | struct fcoe_task_context *task; |
2295 | struct qedf_ctx *qedf = fcport->qedf; |
2296 | struct fc_lport *lport = qedf->lport; |
2297 | int rc = 0; |
2298 | uint16_t xid; |
2299 | int tmo = 0; |
2300 | unsigned long flags; |
2301 | struct fcoe_wqe *sqe; |
2302 | u16 sqe_idx; |
2303 | |
2304 | if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { |
2305 | QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n" ); |
2306 | rc = FAILED; |
2307 | goto no_flush; |
2308 | } |
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; |
2314 | goto no_flush; |
2315 | } |
2316 | |
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 | |
2322 | /* Initialize rest of io_req fields */ |
2323 | io_req->sc_cmd = NULL; |
2324 | io_req->fcport = fcport; |
2325 | io_req->cmd_type = QEDF_TASK_MGMT_CMD; |
2326 | |
2327 | /* Record which cpu this request is associated with */ |
2328 | io_req->cpu = smp_processor_id(); |
2329 | |
2330 | /* Set TM flags */ |
2331 | io_req->io_req_flags = QEDF_READ; |
2332 | io_req->data_xfer_len = 0; |
2333 | io_req->tm_flags = tm_flags; |
2334 | |
2335 | /* Default is to return a SCSI command when an error occurs */ |
2336 | io_req->return_scsi_cmd_on_abts = false; |
2337 | io_req->tm_lun = tm_lun; |
2338 | |
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(info: &qedf->tasks, tid: xid); |
2347 | |
2348 | init_completion(x: &io_req->tm_done); |
2349 | |
2350 | spin_lock_irqsave(&fcport->rport_lock, flags); |
2351 | |
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_ctx: task, sqe); |
2357 | qedf_ring_doorbell(fcport); |
2358 | |
2359 | spin_unlock_irqrestore(lock: &fcport->rport_lock, flags); |
2360 | |
2361 | set_bit(QEDF_CMD_OUTSTANDING, addr: &io_req->flags); |
2362 | tmo = wait_for_completion_timeout(x: &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" ); |
2368 | /* Clear outstanding bit since command timed out */ |
2369 | clear_bit(QEDF_CMD_OUTSTANDING, addr: &io_req->flags); |
2370 | io_req->sc_cmd = NULL; |
2371 | } else { |
2372 | /* Check TMF response code */ |
2373 | if (io_req->fcp_rsp_code == 0) |
2374 | rc = SUCCESS; |
2375 | else |
2376 | rc = FAILED; |
2377 | } |
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(kref: &io_req->refcount, release: qedf_release_cmd); |
2389 | |
2390 | |
2391 | if (tm_flags == FCP_TMF_LUN_RESET) |
2392 | qedf_flush_active_ios(fcport, lun: tm_lun); |
2393 | else |
2394 | qedf_flush_active_ios(fcport, lun: -1); |
2395 | |
2396 | no_flush: |
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 | } |
2404 | return rc; |
2405 | } |
2406 | |
2407 | int qedf_initiate_tmf(struct fc_rport *rport, u64 lun, u8 tm_flags) |
2408 | { |
2409 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
2410 | struct qedf_rport *fcport = (struct qedf_rport *)&rp[1]; |
2411 | struct qedf_ctx *qedf = fcport->qedf; |
2412 | struct fc_lport *lport = rp->local_port; |
2413 | int rc = SUCCESS; |
2414 | struct fc_rport_priv *rdata = fcport->rdata; |
2415 | |
2416 | QEDF_ERR(NULL, |
2417 | "tm_flags 0x%x target_id = 0x%x lun=%llu\n" , |
2418 | tm_flags, rport->scsi_target_id, lun); |
2419 | |
2420 | if (!rdata || !kref_get_unless_zero(kref: &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" ); |
2428 | |
2429 | rc = fc_block_rport(rport); |
2430 | if (rc) |
2431 | goto tmf_err; |
2432 | |
2433 | if (!qedf) { |
2434 | QEDF_ERR(NULL, "qedf is NULL.\n" ); |
2435 | rc = FAILED; |
2436 | goto tmf_err; |
2437 | } |
2438 | |
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 | |
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 | |
2457 | if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { |
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); |
2465 | rc = FAILED; |
2466 | goto tmf_err; |
2467 | } |
2468 | |
2469 | rc = qedf_execute_tmf(fcport, tm_lun: lun, tm_flags); |
2470 | |
2471 | tmf_err: |
2472 | kref_put(kref: &rdata->kref, release: fc_rport_destroy); |
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; |
2480 | |
2481 | clear_bit(QEDF_CMD_OUTSTANDING, addr: &io_req->flags); |
2482 | |
2483 | fcp_rsp = &cqe->cqe_info.rsp_info; |
2484 | qedf_parse_fcp_rsp(io_req, fcp_rsp); |
2485 | |
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; |
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; |
2500 | struct scsi_bd *p_bd_info; |
2501 | |
2502 | p_bd_info = &cqe->cqe_info.unsolic_info.bd_info; |
2503 | QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, |
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); |
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, prefix_str: "bdq " , prefix_type: DUMP_PREFIX_OFFSET, rowsize: 16, groupsize: 1, |
2529 | buf: (void *)bdq_addr, len: pktlen, ascii: false); |
2530 | } |
2531 | |
2532 | /* Allocate frame */ |
2533 | payload_len = pktlen - sizeof(struct fc_frame_header); |
2534 | fp = fc_frame_alloc(dev: qedf->lport, len: 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 | |
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 | |
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(pool: 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(), wq: qedf_io_wq, work: &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(val: qedf->bdq_prod_idx, addr: qedf->bdq_primary_prod); |
2590 | readw(addr: qedf->bdq_primary_prod); |
2591 | writew(val: qedf->bdq_prod_idx, addr: qedf->bdq_secondary_prod); |
2592 | readw(addr: qedf->bdq_secondary_prod); |
2593 | |
2594 | spin_unlock_irqrestore(lock: &qedf->hba_lock, flags); |
2595 | } |
2596 | |