1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 /* QLogic qed NIC Driver
3 * Copyright (c) 2015-2017 QLogic Corporation
4 * Copyright (c) 2019-2020 Marvell International Ltd.
5 */
6
7 #include <linux/types.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/kernel.h>
10 #include <linux/list.h>
11 #include <linux/pci.h>
12 #include <linux/slab.h>
13 #include <linux/string.h>
14 #include "qed.h"
15 #include "qed_iscsi.h"
16 #include "qed_ll2.h"
17 #include "qed_ooo.h"
18 #include "qed_cxt.h"
19 #include "qed_nvmetcp.h"
20 static struct qed_ooo_archipelago
qed_ooo_seek_archipelago(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid)21 *qed_ooo_seek_archipelago(struct qed_hwfn *p_hwfn,
22 struct qed_ooo_info
23 *p_ooo_info,
24 u32 cid)
25 {
26 u32 idx = (cid & 0xffff) - p_ooo_info->cid_base;
27 struct qed_ooo_archipelago *p_archipelago;
28
29 if (unlikely(idx >= p_ooo_info->max_num_archipelagos))
30 return NULL;
31
32 p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
33
34 if (unlikely(list_empty(&p_archipelago->isles_list)))
35 return NULL;
36
37 return p_archipelago;
38 }
39
qed_ooo_seek_isle(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid,u8 isle)40 static struct qed_ooo_isle *qed_ooo_seek_isle(struct qed_hwfn *p_hwfn,
41 struct qed_ooo_info *p_ooo_info,
42 u32 cid, u8 isle)
43 {
44 struct qed_ooo_archipelago *p_archipelago = NULL;
45 struct qed_ooo_isle *p_isle = NULL;
46 u8 the_num_of_isle = 1;
47
48 p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
49 if (unlikely(!p_archipelago)) {
50 DP_NOTICE(p_hwfn,
51 "Connection %d is not found in OOO list\n", cid);
52 return NULL;
53 }
54
55 list_for_each_entry(p_isle, &p_archipelago->isles_list, list_entry) {
56 if (the_num_of_isle == isle)
57 return p_isle;
58 the_num_of_isle++;
59 }
60
61 return NULL;
62 }
63
qed_ooo_save_history_entry(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,struct ooo_opaque * p_cqe)64 void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
65 struct qed_ooo_info *p_ooo_info,
66 struct ooo_opaque *p_cqe)
67 {
68 struct qed_ooo_history *p_history = &p_ooo_info->ooo_history;
69
70 if (p_history->head_idx == p_history->num_of_cqes)
71 p_history->head_idx = 0;
72 p_history->p_cqes[p_history->head_idx] = *p_cqe;
73 p_history->head_idx++;
74 }
75
qed_ooo_alloc(struct qed_hwfn * p_hwfn)76 int qed_ooo_alloc(struct qed_hwfn *p_hwfn)
77 {
78 u16 max_num_archipelagos = 0, cid_base;
79 struct qed_ooo_info *p_ooo_info;
80 enum protocol_type proto;
81 u16 max_num_isles = 0;
82 u32 i;
83
84 switch (p_hwfn->hw_info.personality) {
85 case QED_PCI_ISCSI:
86 case QED_PCI_NVMETCP:
87 proto = PROTOCOLID_TCP_ULP;
88 break;
89 case QED_PCI_ETH_RDMA:
90 case QED_PCI_ETH_IWARP:
91 proto = PROTOCOLID_IWARP;
92 break;
93 default:
94 DP_NOTICE(p_hwfn,
95 "Failed to allocate qed_ooo_info: unknown personality\n");
96 return -EINVAL;
97 }
98
99 max_num_archipelagos = (u16)qed_cxt_get_proto_cid_count(p_hwfn, proto,
100 NULL);
101 max_num_isles = QED_MAX_NUM_ISLES + max_num_archipelagos;
102 cid_base = (u16)qed_cxt_get_proto_cid_start(p_hwfn, proto);
103
104 if (!max_num_archipelagos) {
105 DP_NOTICE(p_hwfn,
106 "Failed to allocate qed_ooo_info: unknown amount of connections\n");
107 return -EINVAL;
108 }
109
110 p_ooo_info = kzalloc(sizeof(*p_ooo_info), GFP_KERNEL);
111 if (!p_ooo_info)
112 return -ENOMEM;
113
114 p_ooo_info->cid_base = cid_base;
115 p_ooo_info->max_num_archipelagos = max_num_archipelagos;
116
117 INIT_LIST_HEAD(&p_ooo_info->free_buffers_list);
118 INIT_LIST_HEAD(&p_ooo_info->ready_buffers_list);
119 INIT_LIST_HEAD(&p_ooo_info->free_isles_list);
120
121 p_ooo_info->p_isles_mem = kcalloc(max_num_isles,
122 sizeof(struct qed_ooo_isle),
123 GFP_KERNEL);
124 if (!p_ooo_info->p_isles_mem)
125 goto no_isles_mem;
126
127 for (i = 0; i < max_num_isles; i++) {
128 INIT_LIST_HEAD(&p_ooo_info->p_isles_mem[i].buffers_list);
129 list_add_tail(&p_ooo_info->p_isles_mem[i].list_entry,
130 &p_ooo_info->free_isles_list);
131 }
132
133 p_ooo_info->p_archipelagos_mem =
134 kcalloc(max_num_archipelagos,
135 sizeof(struct qed_ooo_archipelago),
136 GFP_KERNEL);
137 if (!p_ooo_info->p_archipelagos_mem)
138 goto no_archipelagos_mem;
139
140 for (i = 0; i < max_num_archipelagos; i++)
141 INIT_LIST_HEAD(&p_ooo_info->p_archipelagos_mem[i].isles_list);
142
143 p_ooo_info->ooo_history.p_cqes =
144 kcalloc(QED_MAX_NUM_OOO_HISTORY_ENTRIES,
145 sizeof(struct ooo_opaque),
146 GFP_KERNEL);
147 if (!p_ooo_info->ooo_history.p_cqes)
148 goto no_history_mem;
149
150 p_ooo_info->ooo_history.num_of_cqes = QED_MAX_NUM_OOO_HISTORY_ENTRIES;
151
152 p_hwfn->p_ooo_info = p_ooo_info;
153 return 0;
154
155 no_history_mem:
156 kfree(p_ooo_info->p_archipelagos_mem);
157 no_archipelagos_mem:
158 kfree(p_ooo_info->p_isles_mem);
159 no_isles_mem:
160 kfree(p_ooo_info);
161 return -ENOMEM;
162 }
163
qed_ooo_release_connection_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid)164 void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
165 struct qed_ooo_info *p_ooo_info, u32 cid)
166 {
167 struct qed_ooo_archipelago *p_archipelago;
168 struct qed_ooo_buffer *p_buffer;
169 struct qed_ooo_isle *p_isle;
170
171 p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
172 if (!p_archipelago)
173 return;
174
175 while (!list_empty(&p_archipelago->isles_list)) {
176 p_isle = list_first_entry(&p_archipelago->isles_list,
177 struct qed_ooo_isle, list_entry);
178
179 list_del(&p_isle->list_entry);
180
181 while (!list_empty(&p_isle->buffers_list)) {
182 p_buffer = list_first_entry(&p_isle->buffers_list,
183 struct qed_ooo_buffer,
184 list_entry);
185
186 if (!p_buffer)
187 break;
188
189 list_move_tail(&p_buffer->list_entry,
190 &p_ooo_info->free_buffers_list);
191 }
192 list_add_tail(&p_isle->list_entry,
193 &p_ooo_info->free_isles_list);
194 }
195 }
196
qed_ooo_release_all_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info)197 void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
198 struct qed_ooo_info *p_ooo_info)
199 {
200 struct qed_ooo_archipelago *p_archipelago;
201 struct qed_ooo_buffer *p_buffer;
202 struct qed_ooo_isle *p_isle;
203 u32 i;
204
205 for (i = 0; i < p_ooo_info->max_num_archipelagos; i++) {
206 p_archipelago = &(p_ooo_info->p_archipelagos_mem[i]);
207
208 while (!list_empty(&p_archipelago->isles_list)) {
209 p_isle = list_first_entry(&p_archipelago->isles_list,
210 struct qed_ooo_isle,
211 list_entry);
212
213 list_del(&p_isle->list_entry);
214
215 while (!list_empty(&p_isle->buffers_list)) {
216 p_buffer =
217 list_first_entry(&p_isle->buffers_list,
218 struct qed_ooo_buffer,
219 list_entry);
220
221 if (!p_buffer)
222 break;
223
224 list_move_tail(&p_buffer->list_entry,
225 &p_ooo_info->free_buffers_list);
226 }
227 list_add_tail(&p_isle->list_entry,
228 &p_ooo_info->free_isles_list);
229 }
230 }
231 if (!list_empty(&p_ooo_info->ready_buffers_list))
232 list_splice_tail_init(&p_ooo_info->ready_buffers_list,
233 &p_ooo_info->free_buffers_list);
234 }
235
qed_ooo_setup(struct qed_hwfn * p_hwfn)236 void qed_ooo_setup(struct qed_hwfn *p_hwfn)
237 {
238 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
239 memset(p_hwfn->p_ooo_info->ooo_history.p_cqes, 0,
240 p_hwfn->p_ooo_info->ooo_history.num_of_cqes *
241 sizeof(struct ooo_opaque));
242 p_hwfn->p_ooo_info->ooo_history.head_idx = 0;
243 }
244
qed_ooo_free(struct qed_hwfn * p_hwfn)245 void qed_ooo_free(struct qed_hwfn *p_hwfn)
246 {
247 struct qed_ooo_info *p_ooo_info = p_hwfn->p_ooo_info;
248 struct qed_ooo_buffer *p_buffer;
249
250 if (!p_ooo_info)
251 return;
252
253 qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
254 while (!list_empty(&p_ooo_info->free_buffers_list)) {
255 p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
256 struct qed_ooo_buffer, list_entry);
257
258 if (!p_buffer)
259 break;
260
261 list_del(&p_buffer->list_entry);
262 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
263 p_buffer->rx_buffer_size,
264 p_buffer->rx_buffer_virt_addr,
265 p_buffer->rx_buffer_phys_addr);
266 kfree(p_buffer);
267 }
268
269 kfree(p_ooo_info->p_isles_mem);
270 kfree(p_ooo_info->p_archipelagos_mem);
271 kfree(p_ooo_info->ooo_history.p_cqes);
272 kfree(p_ooo_info);
273 p_hwfn->p_ooo_info = NULL;
274 }
275
qed_ooo_put_free_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,struct qed_ooo_buffer * p_buffer)276 void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
277 struct qed_ooo_info *p_ooo_info,
278 struct qed_ooo_buffer *p_buffer)
279 {
280 list_add_tail(&p_buffer->list_entry, &p_ooo_info->free_buffers_list);
281 }
282
qed_ooo_get_free_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info)283 struct qed_ooo_buffer *qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
284 struct qed_ooo_info *p_ooo_info)
285 {
286 struct qed_ooo_buffer *p_buffer = NULL;
287
288 if (!list_empty(&p_ooo_info->free_buffers_list)) {
289 p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
290 struct qed_ooo_buffer, list_entry);
291
292 list_del(&p_buffer->list_entry);
293 }
294
295 return p_buffer;
296 }
297
qed_ooo_put_ready_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,struct qed_ooo_buffer * p_buffer,u8 on_tail)298 void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
299 struct qed_ooo_info *p_ooo_info,
300 struct qed_ooo_buffer *p_buffer, u8 on_tail)
301 {
302 if (on_tail)
303 list_add_tail(&p_buffer->list_entry,
304 &p_ooo_info->ready_buffers_list);
305 else
306 list_add(&p_buffer->list_entry,
307 &p_ooo_info->ready_buffers_list);
308 }
309
qed_ooo_get_ready_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info)310 struct qed_ooo_buffer *qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
311 struct qed_ooo_info *p_ooo_info)
312 {
313 struct qed_ooo_buffer *p_buffer = NULL;
314
315 if (!list_empty(&p_ooo_info->ready_buffers_list)) {
316 p_buffer = list_first_entry(&p_ooo_info->ready_buffers_list,
317 struct qed_ooo_buffer, list_entry);
318
319 list_del(&p_buffer->list_entry);
320 }
321
322 return p_buffer;
323 }
324
qed_ooo_delete_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid,u8 drop_isle,u8 drop_size)325 void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
326 struct qed_ooo_info *p_ooo_info,
327 u32 cid, u8 drop_isle, u8 drop_size)
328 {
329 struct qed_ooo_isle *p_isle = NULL;
330 u8 isle_idx;
331
332 for (isle_idx = 0; isle_idx < drop_size; isle_idx++) {
333 p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, drop_isle);
334 if (!p_isle) {
335 DP_NOTICE(p_hwfn,
336 "Isle %d is not found(cid %d)\n",
337 drop_isle, cid);
338 return;
339 }
340 if (list_empty(&p_isle->buffers_list))
341 DP_NOTICE(p_hwfn,
342 "Isle %d is empty(cid %d)\n", drop_isle, cid);
343 else
344 list_splice_tail_init(&p_isle->buffers_list,
345 &p_ooo_info->free_buffers_list);
346
347 list_del(&p_isle->list_entry);
348 p_ooo_info->cur_isles_number--;
349 list_add(&p_isle->list_entry, &p_ooo_info->free_isles_list);
350 }
351 }
352
qed_ooo_add_new_isle(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid,u8 ooo_isle,struct qed_ooo_buffer * p_buffer)353 void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
354 struct qed_ooo_info *p_ooo_info,
355 u32 cid, u8 ooo_isle,
356 struct qed_ooo_buffer *p_buffer)
357 {
358 struct qed_ooo_archipelago *p_archipelago = NULL;
359 struct qed_ooo_isle *p_prev_isle = NULL;
360 struct qed_ooo_isle *p_isle = NULL;
361
362 if (ooo_isle > 1) {
363 p_prev_isle = qed_ooo_seek_isle(p_hwfn,
364 p_ooo_info, cid, ooo_isle - 1);
365 if (unlikely(!p_prev_isle)) {
366 DP_NOTICE(p_hwfn,
367 "Isle %d is not found(cid %d)\n",
368 ooo_isle - 1, cid);
369 return;
370 }
371 }
372 p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
373 if (unlikely(!p_archipelago && ooo_isle != 1)) {
374 DP_NOTICE(p_hwfn,
375 "Connection %d is not found in OOO list\n", cid);
376 return;
377 }
378
379 if (!list_empty(&p_ooo_info->free_isles_list)) {
380 p_isle = list_first_entry(&p_ooo_info->free_isles_list,
381 struct qed_ooo_isle, list_entry);
382
383 list_del(&p_isle->list_entry);
384 if (unlikely(!list_empty(&p_isle->buffers_list))) {
385 DP_NOTICE(p_hwfn, "Free isle is not empty\n");
386 INIT_LIST_HEAD(&p_isle->buffers_list);
387 }
388 } else {
389 DP_NOTICE(p_hwfn, "No more free isles\n");
390 return;
391 }
392
393 if (!p_archipelago) {
394 u32 idx = (cid & 0xffff) - p_ooo_info->cid_base;
395
396 p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
397 }
398
399 list_add(&p_buffer->list_entry, &p_isle->buffers_list);
400 p_ooo_info->cur_isles_number++;
401 p_ooo_info->gen_isles_number++;
402
403 if (p_ooo_info->cur_isles_number > p_ooo_info->max_isles_number)
404 p_ooo_info->max_isles_number = p_ooo_info->cur_isles_number;
405
406 if (!p_prev_isle)
407 list_add(&p_isle->list_entry, &p_archipelago->isles_list);
408 else
409 list_add(&p_isle->list_entry, &p_prev_isle->list_entry);
410 }
411
qed_ooo_add_new_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid,u8 ooo_isle,struct qed_ooo_buffer * p_buffer,u8 buffer_side)412 void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
413 struct qed_ooo_info *p_ooo_info,
414 u32 cid,
415 u8 ooo_isle,
416 struct qed_ooo_buffer *p_buffer, u8 buffer_side)
417 {
418 struct qed_ooo_isle *p_isle = NULL;
419
420 p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, ooo_isle);
421 if (unlikely(!p_isle)) {
422 DP_NOTICE(p_hwfn,
423 "Isle %d is not found(cid %d)\n", ooo_isle, cid);
424 return;
425 }
426
427 if (unlikely(buffer_side == QED_OOO_LEFT_BUF))
428 list_add(&p_buffer->list_entry, &p_isle->buffers_list);
429 else
430 list_add_tail(&p_buffer->list_entry, &p_isle->buffers_list);
431 }
432
qed_ooo_join_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid,u8 left_isle)433 void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
434 struct qed_ooo_info *p_ooo_info, u32 cid, u8 left_isle)
435 {
436 struct qed_ooo_isle *p_right_isle = NULL;
437 struct qed_ooo_isle *p_left_isle = NULL;
438
439 p_right_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
440 left_isle + 1);
441 if (unlikely(!p_right_isle)) {
442 DP_NOTICE(p_hwfn,
443 "Right isle %d is not found(cid %d)\n",
444 left_isle + 1, cid);
445 return;
446 }
447
448 list_del(&p_right_isle->list_entry);
449 p_ooo_info->cur_isles_number--;
450 if (left_isle) {
451 p_left_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
452 left_isle);
453 if (unlikely(!p_left_isle)) {
454 DP_NOTICE(p_hwfn,
455 "Left isle %d is not found(cid %d)\n",
456 left_isle, cid);
457 return;
458 }
459 list_splice_tail_init(&p_right_isle->buffers_list,
460 &p_left_isle->buffers_list);
461 } else {
462 list_splice_tail_init(&p_right_isle->buffers_list,
463 &p_ooo_info->ready_buffers_list);
464 }
465 list_add_tail(&p_right_isle->list_entry, &p_ooo_info->free_isles_list);
466 }
467
