xref: /dpdk/drivers/net/ionic/ionic_dev.c (revision 384bac8d65552e429bffae962f2c0872541fe8a4) 
1 /* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
2  * Copyright(c) 2018-2019 Pensando Systems, Inc. All rights reserved.
3  */
4 
5 #include <stdbool.h>
6 
7 #include <rte_malloc.h>
8 
9 #include "ionic_dev.h"
10 #include "ionic_lif.h"
11 #include "ionic.h"
12 
13 int
14 ionic_dev_setup(struct ionic_adapter *adapter)
15 {
16 	struct ionic_dev_bar *bar = adapter->bars;
17 	unsigned int num_bars = adapter->num_bars;
18 	struct ionic_dev *idev = &adapter->idev;
19 	uint32_t sig;
20 	u_char *bar0_base;
21 	unsigned int i;
22 
23 	/* BAR0: dev_cmd and interrupts */
24 	if (num_bars < 1) {
25 		IONIC_PRINT(ERR, "No bars found, aborting");
26 		return -EFAULT;
27 	}
28 
29 	if (bar->len < IONIC_BAR0_SIZE) {
30 		IONIC_PRINT(ERR,
31 			"Resource bar size %lu too small, aborting",
32 			bar->len);
33 		return -EFAULT;
34 	}
35 
36 	bar0_base = bar->vaddr;
37 	idev->dev_info = (union ionic_dev_info_regs *)
38 		&bar0_base[IONIC_BAR0_DEV_INFO_REGS_OFFSET];
39 	idev->dev_cmd = (union ionic_dev_cmd_regs *)
40 		&bar0_base[IONIC_BAR0_DEV_CMD_REGS_OFFSET];
41 	idev->intr_status = (struct ionic_intr_status *)
42 		&bar0_base[IONIC_BAR0_INTR_STATUS_OFFSET];
43 	idev->intr_ctrl = (struct ionic_intr *)
44 		&bar0_base[IONIC_BAR0_INTR_CTRL_OFFSET];
45 
46 	sig = ioread32(&idev->dev_info->signature);
47 	if (sig != IONIC_DEV_INFO_SIGNATURE) {
48 		IONIC_PRINT(ERR, "Incompatible firmware signature %" PRIx32 "",
49 			sig);
50 		return -EFAULT;
51 	}
52 
53 	for (i = 0; i < IONIC_DEVINFO_FWVERS_BUFLEN; i++)
54 		adapter->fw_version[i] =
55 			ioread8(&idev->dev_info->fw_version[i]);
56 	adapter->fw_version[IONIC_DEVINFO_FWVERS_BUFLEN - 1] = '\0';
57 
58 	IONIC_PRINT(DEBUG, "Firmware version: %s", adapter->fw_version);
59 
60 	/* BAR1: doorbells */
61 	bar++;
62 	if (num_bars < 2) {
63 		IONIC_PRINT(ERR, "Doorbell bar missing, aborting");
64 		return -EFAULT;
65 	}
66 
67 	idev->db_pages = bar->vaddr;
68 
69 	return 0;
70 }
71 
72 /* Devcmd Interface */
73 
74 uint8_t
75 ionic_dev_cmd_status(struct ionic_dev *idev)
76 {
77 	return ioread8(&idev->dev_cmd->comp.comp.status);
78 }
79 
80 bool
81 ionic_dev_cmd_done(struct ionic_dev *idev)
82 {
83 	return ioread32(&idev->dev_cmd->done) & IONIC_DEV_CMD_DONE;
84 }
85 
86 void
87 ionic_dev_cmd_comp(struct ionic_dev *idev, void *mem)
88 {
89 	union ionic_dev_cmd_comp *comp = mem;
90 	unsigned int i;
91 	uint32_t comp_size = sizeof(comp->words) /
92 		sizeof(comp->words[0]);
93 
94 	for (i = 0; i < comp_size; i++)
95 		comp->words[i] = ioread32(&idev->dev_cmd->comp.words[i]);
96 }
97 
98 void
99 ionic_dev_cmd_go(struct ionic_dev *idev, union ionic_dev_cmd *cmd)
100 {
101 	unsigned int i;
102 	uint32_t cmd_size = sizeof(cmd->words) /
103 		sizeof(cmd->words[0]);
104 
105 	IONIC_PRINT(DEBUG, "Sending %s (%d) via dev_cmd",
106 		    ionic_opcode_to_str(cmd->cmd.opcode), cmd->cmd.opcode);
107 
108 	for (i = 0; i < cmd_size; i++)
109 		iowrite32(cmd->words[i], &idev->dev_cmd->cmd.words[i]);
110 
111 	iowrite32(0, &idev->dev_cmd->done);
112 	iowrite32(1, &idev->dev_cmd->doorbell);
113 }
114 
115 /* Device commands */
116 
117 void
118 ionic_dev_cmd_identify(struct ionic_dev *idev, uint8_t ver)
119 {
120 	union ionic_dev_cmd cmd = {
121 		.identify.opcode = IONIC_CMD_IDENTIFY,
122 		.identify.ver = ver,
123 	};
124 
125 	ionic_dev_cmd_go(idev, &cmd);
126 }
127 
128 void
129 ionic_dev_cmd_init(struct ionic_dev *idev)
130 {
131 	union ionic_dev_cmd cmd = {
132 		.init.opcode = IONIC_CMD_INIT,
133 		.init.type = 0,
134 	};
135 
136 	ionic_dev_cmd_go(idev, &cmd);
137 }
138 
139 void
140 ionic_dev_cmd_reset(struct ionic_dev *idev)
141 {
142 	union ionic_dev_cmd cmd = {
143 		.reset.opcode = IONIC_CMD_RESET,
144 	};
145 
146 	ionic_dev_cmd_go(idev, &cmd);
147 }
148 
149 /* Port commands */
150 
151 void
152 ionic_dev_cmd_port_identify(struct ionic_dev *idev)
153 {
154 	union ionic_dev_cmd cmd = {
155 		.port_init.opcode = IONIC_CMD_PORT_IDENTIFY,
156 		.port_init.index = 0,
157 	};
158 
159 	ionic_dev_cmd_go(idev, &cmd);
160 }
161 
162 void
163 ionic_dev_cmd_port_init(struct ionic_dev *idev)
164 {
165 	union ionic_dev_cmd cmd = {
166 		.port_init.opcode = IONIC_CMD_PORT_INIT,
167 		.port_init.index = 0,
168 		.port_init.info_pa = idev->port_info_pa,
169 	};
170 
171 	ionic_dev_cmd_go(idev, &cmd);
172 }
173 
174 void
175 ionic_dev_cmd_port_reset(struct ionic_dev *idev)
176 {
177 	union ionic_dev_cmd cmd = {
178 		.port_reset.opcode = IONIC_CMD_PORT_RESET,
179 		.port_reset.index = 0,
180 	};
181 
182 	ionic_dev_cmd_go(idev, &cmd);
183 }
184 
185 void
186 ionic_dev_cmd_port_state(struct ionic_dev *idev, uint8_t state)
187 {
188 	union ionic_dev_cmd cmd = {
189 		.port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
190 		.port_setattr.index = 0,
191 		.port_setattr.attr = IONIC_PORT_ATTR_STATE,
192 		.port_setattr.state = state,
193 	};
194 
195 	ionic_dev_cmd_go(idev, &cmd);
196 }
197 
198 void
199 ionic_dev_cmd_port_speed(struct ionic_dev *idev, uint32_t speed)
200 {
201 	union ionic_dev_cmd cmd = {
202 		.port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
203 		.port_setattr.index = 0,
204 		.port_setattr.attr = IONIC_PORT_ATTR_SPEED,
205 		.port_setattr.speed = speed,
206 	};
207 
208 	ionic_dev_cmd_go(idev, &cmd);
209 }
210 
211 void
212 ionic_dev_cmd_port_mtu(struct ionic_dev *idev, uint32_t mtu)
213 {
214 	union ionic_dev_cmd cmd = {
215 		.port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
216 		.port_setattr.index = 0,
217 		.port_setattr.attr = IONIC_PORT_ATTR_MTU,
218 		.port_setattr.mtu = mtu,
219 	};
220 
221 	ionic_dev_cmd_go(idev, &cmd);
222 }
223 
224 void
225 ionic_dev_cmd_port_autoneg(struct ionic_dev *idev, uint8_t an_enable)
226 {
227 	union ionic_dev_cmd cmd = {
228 		.port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
229 		.port_setattr.index = 0,
230 		.port_setattr.attr = IONIC_PORT_ATTR_AUTONEG,
231 		.port_setattr.an_enable = an_enable,
232 	};
233 
234 	ionic_dev_cmd_go(idev, &cmd);
235 }
236 
237 void
238 ionic_dev_cmd_port_fec(struct ionic_dev *idev, uint8_t fec_type)
239 {
240 	union ionic_dev_cmd cmd = {
241 		.port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
242 		.port_setattr.index = 0,
243 		.port_setattr.attr = IONIC_PORT_ATTR_FEC,
244 		.port_setattr.fec_type = fec_type,
245 	};
246 
247 	ionic_dev_cmd_go(idev, &cmd);
248 }
249 
250 void
251 ionic_dev_cmd_port_pause(struct ionic_dev *idev, uint8_t pause_type)
252 {
253 	union ionic_dev_cmd cmd = {
254 		.port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
255 		.port_setattr.index = 0,
256 		.port_setattr.attr = IONIC_PORT_ATTR_PAUSE,
257 		.port_setattr.pause_type = pause_type,
258 	};
259 
260 	ionic_dev_cmd_go(idev, &cmd);
261 }
262 
263 void
264 ionic_dev_cmd_port_loopback(struct ionic_dev *idev, uint8_t loopback_mode)
265 {
266 	union ionic_dev_cmd cmd = {
267 		.port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
268 		.port_setattr.index = 0,
269 		.port_setattr.attr = IONIC_PORT_ATTR_LOOPBACK,
270 		.port_setattr.loopback_mode = loopback_mode,
271 	};
272 
273 	ionic_dev_cmd_go(idev, &cmd);
274 }
275 
276 /* LIF commands */
277 
278 void
279 ionic_dev_cmd_lif_identify(struct ionic_dev *idev, uint8_t type, uint8_t ver)
280 {
281 	union ionic_dev_cmd cmd = {
282 		.lif_identify.opcode = IONIC_CMD_LIF_IDENTIFY,
283 		.lif_identify.type = type,
284 		.lif_identify.ver = ver,
285 	};
286 
287 	ionic_dev_cmd_go(idev, &cmd);
288 }
289 
290 void
291 ionic_dev_cmd_lif_init(struct ionic_dev *idev, rte_iova_t info_pa)
292 {
293 	union ionic_dev_cmd cmd = {
294 		.lif_init.opcode = IONIC_CMD_LIF_INIT,
295 		.lif_init.info_pa = info_pa,
296 	};
297 
298 	ionic_dev_cmd_go(idev, &cmd);
299 }
300 
301 void
302 ionic_dev_cmd_lif_reset(struct ionic_dev *idev)
303 {
304 	union ionic_dev_cmd cmd = {
305 		.lif_init.opcode = IONIC_CMD_LIF_RESET,
306 	};
307 
308 	ionic_dev_cmd_go(idev, &cmd);
309 }
310 
311 struct ionic_doorbell *
312 ionic_db_map(struct ionic_lif *lif, struct ionic_queue *q)
313 {
314 	return lif->kern_dbpage + q->hw_type;
315 }
316 
317 void
318 ionic_intr_init(struct ionic_dev *idev, struct ionic_intr_info *intr,
319 		unsigned long index)
320 {
321 	ionic_intr_clean(idev->intr_ctrl, index);
322 	intr->index = index;
323 }
324 
325 void
326 ionic_dev_cmd_adminq_init(struct ionic_dev *idev,
327 		struct ionic_qcq *qcq,
328 		uint16_t intr_index)
329 {
330 	struct ionic_queue *q = &qcq->q;
331 	struct ionic_cq *cq = &qcq->cq;
332 
333 	union ionic_dev_cmd cmd = {
334 		.q_init.opcode = IONIC_CMD_Q_INIT,
335 		.q_init.type = q->type,
336 		.q_init.index = q->index,
337 		.q_init.flags = IONIC_QINIT_F_ENA,
338 		.q_init.intr_index = intr_index,
339 		.q_init.ring_size = rte_log2_u32(q->num_descs),
340 		.q_init.ring_base = q->base_pa,
341 		.q_init.cq_ring_base = cq->base_pa,
342 	};
343 
344 	IONIC_PRINT(DEBUG, "adminq.q_init.ver %u", cmd.q_init.ver);
345 
346 	ionic_dev_cmd_go(idev, &cmd);
347 }
348 
349 int
350 ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
351 		struct ionic_intr_info *intr,
352 		uint32_t num_descs, size_t desc_size)
353 {
354 	if (desc_size == 0) {
355 		IONIC_PRINT(ERR, "Descriptor size is %zu", desc_size);
356 		return -EINVAL;
357 	}
358 
359 	if (!rte_is_power_of_2(num_descs) ||
360 	    num_descs < IONIC_MIN_RING_DESC ||
361 	    num_descs > IONIC_MAX_RING_DESC) {
362 		IONIC_PRINT(ERR, "%u descriptors (min: %u max: %u)",
363 			num_descs, IONIC_MIN_RING_DESC, IONIC_MAX_RING_DESC);
364 		return -EINVAL;
365 	}
366 
367 	cq->lif = lif;
368 	cq->bound_intr = intr;
369 	cq->num_descs = num_descs;
370 	cq->desc_size = desc_size;
371 	cq->tail_idx = 0;
372 	cq->done_color = 1;
373 
374 	return 0;
375 }
376 
377 void
378 ionic_cq_map(struct ionic_cq *cq, void *base, rte_iova_t base_pa)
379 {
380 	cq->base = base;
381 	cq->base_pa = base_pa;
382 }
383 
384 void
385 ionic_cq_bind(struct ionic_cq *cq, struct ionic_queue *q)
386 {
387 	cq->bound_q = q;
388 	q->bound_cq = cq;
389 }
390 
391 uint32_t
392 ionic_cq_service(struct ionic_cq *cq, uint32_t work_to_do,
393 		 ionic_cq_cb cb, void *cb_arg)
394 {
395 	uint32_t work_done = 0;
396 
397 	if (work_to_do == 0)
398 		return 0;
399 
400 	while (cb(cq, cq->tail_idx, cb_arg)) {
401 		cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
402 		if (cq->tail_idx == 0)
403 			cq->done_color = !cq->done_color;
404 
405 		if (++work_done == work_to_do)
406 			break;
407 	}
408 
409 	return work_done;
410 }
411 
412 int
413 ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
414 	     struct ionic_queue *q, uint32_t index, uint32_t num_descs,
415 	     size_t desc_size, size_t sg_desc_size)
416 {
417 	uint32_t ring_size;
418 
419 	if (desc_size == 0 || !rte_is_power_of_2(num_descs))
420 		return -EINVAL;
421 
422 	ring_size = rte_log2_u32(num_descs);
423 
424 	if (ring_size < 2 || ring_size > 16)
425 		return -EINVAL;
426 
427 	q->lif = lif;
428 	q->idev = idev;
429 	q->index = index;
430 	q->num_descs = num_descs;
431 	q->desc_size = desc_size;
432 	q->sg_desc_size = sg_desc_size;
433 	q->head_idx = 0;
434 	q->tail_idx = 0;
435 
436 	return 0;
437 }
438 
439 void
440 ionic_q_map(struct ionic_queue *q, void *base, rte_iova_t base_pa)
441 {
442 	q->base = base;
443 	q->base_pa = base_pa;
444 }
445 
446 void
447 ionic_q_sg_map(struct ionic_queue *q, void *base, rte_iova_t base_pa)
448 {
449 	q->sg_base = base;
450 	q->sg_base_pa = base_pa;
451 }
452 
453 void
454 ionic_q_flush(struct ionic_queue *q)
455 {
456 	writeq(IONIC_DBELL_QID(q->hw_index) | q->head_idx, q->db);
457 }
458 
459 void
460 ionic_q_post(struct ionic_queue *q, bool ring_doorbell, desc_cb cb,
461 	     void *cb_arg)
462 {
463 	struct ionic_desc_info *head = &q->info[q->head_idx];
464 
465 	head->cb = cb;
466 	head->cb_arg = cb_arg;
467 
468 	q->head_idx = (q->head_idx + 1) & (q->num_descs - 1);
469 
470 	if (ring_doorbell)
471 		ionic_q_flush(q);
472 }
473 
474 uint32_t
475 ionic_q_space_avail(struct ionic_queue *q)
476 {
477 	uint32_t avail = q->tail_idx;
478 
479 	if (q->head_idx >= avail)
480 		avail += q->num_descs - q->head_idx - 1;
481 	else
482 		avail -= q->head_idx + 1;
483 
484 	return avail;
485 }
486 
487 bool
488 ionic_q_has_space(struct ionic_queue *q, uint32_t want)
489 {
490 	return ionic_q_space_avail(q) >= want;
491 }
492 
493 void
494 ionic_q_service(struct ionic_queue *q, uint32_t cq_desc_index,
495 		uint32_t stop_index, void *service_cb_arg)
496 {
497 	struct ionic_desc_info *desc_info;
498 	uint32_t curr_q_tail_idx;
499 
500 	do {
501 		desc_info = &q->info[q->tail_idx];
502 
503 		if (desc_info->cb)
504 			desc_info->cb(q, q->tail_idx, cq_desc_index,
505 				desc_info->cb_arg, service_cb_arg);
506 
507 		desc_info->cb = NULL;
508 		desc_info->cb_arg = NULL;
509 
510 		curr_q_tail_idx = q->tail_idx;
511 		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
512 
513 	} while (curr_q_tail_idx != stop_index);
514 }
515 
516 static void
517 ionic_adminq_cb(struct ionic_queue *q,
518 		uint32_t q_desc_index, uint32_t cq_desc_index,
519 		void *cb_arg, void *service_cb_arg __rte_unused)
520 {
521 	struct ionic_admin_ctx *ctx = cb_arg;
522 	struct ionic_admin_comp *cq_desc_base = q->bound_cq->base;
523 	struct ionic_admin_comp *cq_desc = &cq_desc_base[cq_desc_index];
524 
525 	if (unlikely(cq_desc->comp_index != q_desc_index)) {
526 		IONIC_WARN_ON(cq_desc->comp_index != q_desc_index);
527 		return;
528 	}
529 
530 	memcpy(&ctx->comp, cq_desc, sizeof(*cq_desc));
531 
532 	ctx->pending_work = false; /* done */
533 }
534 
535 /** ionic_adminq_post - Post an admin command.
536  * @lif:		Handle to lif.
537  * @cmd_ctx:		Api admin command context.
538  *
539  * Post the command to an admin queue in the ethernet driver.  If this command
540  * succeeds, then the command has been posted, but that does not indicate a
541  * completion.  If this command returns success, then the completion callback
542  * will eventually be called.
543  *
544  * Return: zero or negative error status.
545  */
546 int
547 ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
548 {
549 	struct ionic_queue *adminq = &lif->adminqcq->q;
550 	struct ionic_admin_cmd *q_desc_base = adminq->base;
551 	struct ionic_admin_cmd *q_desc;
552 	int err = 0;
553 
554 	rte_spinlock_lock(&lif->adminq_lock);
555 
556 	if (!ionic_q_has_space(adminq, 1)) {
557 		err = -ENOSPC;
558 		goto err_out;
559 	}
560 
561 	q_desc = &q_desc_base[adminq->head_idx];
562 
563 	memcpy(q_desc, &ctx->cmd, sizeof(ctx->cmd));
564 
565 	ionic_q_post(adminq, true, ionic_adminq_cb, ctx);
566 
567 err_out:
568 	rte_spinlock_unlock(&lif->adminq_lock);
569 
570 	return err;
571 }
572