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
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 (idx >= p_ooo_info->max_num_archipelagos)
30 return NULL;
31
32 p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
33
34 if (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 (!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 proto = PROTOCOLID_ISCSI;
87 break;
88 case QED_PCI_ETH_RDMA:
89 case QED_PCI_ETH_IWARP:
90 proto = PROTOCOLID_IWARP;
91 break;
92 default:
93 DP_NOTICE(p_hwfn,
94 "Failed to allocate qed_ooo_info: unknown personality\n");
95 return -EINVAL;
96 }
97
98 max_num_archipelagos = (u16)qed_cxt_get_proto_cid_count(p_hwfn, proto,
99 NULL);
100 max_num_isles = QED_MAX_NUM_ISLES + max_num_archipelagos;
101 cid_base = (u16)qed_cxt_get_proto_cid_start(p_hwfn, proto);
102
103 if (!max_num_archipelagos) {
104 DP_NOTICE(p_hwfn,
105 "Failed to allocate qed_ooo_info: unknown amount of connections\n");
106 return -EINVAL;
107 }
108
109 p_ooo_info = kzalloc(sizeof(*p_ooo_info), GFP_KERNEL);
110 if (!p_ooo_info)
111 return -ENOMEM;
112
113 p_ooo_info->cid_base = cid_base;
114 p_ooo_info->max_num_archipelagos = max_num_archipelagos;
115
116 INIT_LIST_HEAD(&p_ooo_info->free_buffers_list);
117 INIT_LIST_HEAD(&p_ooo_info->ready_buffers_list);
118 INIT_LIST_HEAD(&p_ooo_info->free_isles_list);
119
120 p_ooo_info->p_isles_mem = kcalloc(max_num_isles,
121 sizeof(struct qed_ooo_isle),
122 GFP_KERNEL);
123 if (!p_ooo_info->p_isles_mem)
124 goto no_isles_mem;
125
126 for (i = 0; i < max_num_isles; i++) {
127 INIT_LIST_HEAD(&p_ooo_info->p_isles_mem[i].buffers_list);
128 list_add_tail(&p_ooo_info->p_isles_mem[i].list_entry,
129 &p_ooo_info->free_isles_list);
130 }
131
132 p_ooo_info->p_archipelagos_mem =
133 kcalloc(max_num_archipelagos,
134 sizeof(struct qed_ooo_archipelago),
135 GFP_KERNEL);
136 if (!p_ooo_info->p_archipelagos_mem)
137 goto no_archipelagos_mem;
138
139 for (i = 0; i < max_num_archipelagos; i++)
140 INIT_LIST_HEAD(&p_ooo_info->p_archipelagos_mem[i].isles_list);
141
142 p_ooo_info->ooo_history.p_cqes =
143 kcalloc(QED_MAX_NUM_OOO_HISTORY_ENTRIES,
144 sizeof(struct ooo_opaque),
145 GFP_KERNEL);
146 if (!p_ooo_info->ooo_history.p_cqes)
147 goto no_history_mem;
148
149 p_ooo_info->ooo_history.num_of_cqes = QED_MAX_NUM_OOO_HISTORY_ENTRIES;
150
151 p_hwfn->p_ooo_info = p_ooo_info;
152 return 0;
153
154 no_history_mem:
155 kfree(p_ooo_info->p_archipelagos_mem);
156 no_archipelagos_mem:
157 kfree(p_ooo_info->p_isles_mem);
158 no_isles_mem:
159 kfree(p_ooo_info);
160 return -ENOMEM;
161 }
162
qed_ooo_release_connection_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid)163 void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
164 struct qed_ooo_info *p_ooo_info, u32 cid)
165 {
166 struct qed_ooo_archipelago *p_archipelago;
167 struct qed_ooo_buffer *p_buffer;
168 struct qed_ooo_isle *p_isle;
169
170 p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
171 if (!p_archipelago)
172 return;
173
174 while (!list_empty(&p_archipelago->isles_list)) {
175 p_isle = list_first_entry(&p_archipelago->isles_list,
176 struct qed_ooo_isle, list_entry);
177
178 list_del(&p_isle->list_entry);
179
180 while (!list_empty(&p_isle->buffers_list)) {
181 p_buffer = list_first_entry(&p_isle->buffers_list,
182 struct qed_ooo_buffer,
183 list_entry);
184
185 if (!p_buffer)
186 break;
187
188 list_move_tail(&p_buffer->list_entry,
189 &p_ooo_info->free_buffers_list);
190 }
191 list_add_tail(&p_isle->list_entry,
192 &p_ooo_info->free_isles_list);
193 }
194 }
195
qed_ooo_release_all_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info)196 void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
197 struct qed_ooo_info *p_ooo_info)
198 {
199 struct qed_ooo_archipelago *p_archipelago;
200 struct qed_ooo_buffer *p_buffer;
201 struct qed_ooo_isle *p_isle;
202 u32 i;
203
204 for (i = 0; i < p_ooo_info->max_num_archipelagos; i++) {
205 p_archipelago = &(p_ooo_info->p_archipelagos_mem[i]);
206
207 while (!list_empty(&p_archipelago->isles_list)) {
208 p_isle = list_first_entry(&p_archipelago->isles_list,
209 struct qed_ooo_isle,
210 list_entry);
211
212 list_del(&p_isle->list_entry);
213
214 while (!list_empty(&p_isle->buffers_list)) {
215 p_buffer =
216 list_first_entry(&p_isle->buffers_list,
217 struct qed_ooo_buffer,
218 list_entry);
219
220 if (!p_buffer)
221 break;
222
223 list_move_tail(&p_buffer->list_entry,
224 &p_ooo_info->free_buffers_list);
225 }
226 list_add_tail(&p_isle->list_entry,
227 &p_ooo_info->free_isles_list);
228 }
229 }
230 if (!list_empty(&p_ooo_info->ready_buffers_list))
231 list_splice_tail_init(&p_ooo_info->ready_buffers_list,
232 &p_ooo_info->free_buffers_list);
233 }
234
qed_ooo_setup(struct qed_hwfn * p_hwfn)235 void qed_ooo_setup(struct qed_hwfn *p_hwfn)
236 {
237 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
238 memset(p_hwfn->p_ooo_info->ooo_history.p_cqes, 0,
239 p_hwfn->p_ooo_info->ooo_history.num_of_cqes *
240 sizeof(struct ooo_opaque));
241 p_hwfn->p_ooo_info->ooo_history.head_idx = 0;
242 }
243
qed_ooo_free(struct qed_hwfn * p_hwfn)244 void qed_ooo_free(struct qed_hwfn *p_hwfn)
245 {
246 struct qed_ooo_info *p_ooo_info = p_hwfn->p_ooo_info;
247 struct qed_ooo_buffer *p_buffer;
248
249 if (!p_ooo_info)
250 return;
251
252 qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
253 while (!list_empty(&p_ooo_info->free_buffers_list)) {
254 p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
255 struct qed_ooo_buffer, list_entry);
256
257 if (!p_buffer)
258 break;
259
260 list_del(&p_buffer->list_entry);
261 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
262 p_buffer->rx_buffer_size,
263 p_buffer->rx_buffer_virt_addr,
264 p_buffer->rx_buffer_phys_addr);
265 kfree(p_buffer);
266 }
267
268 kfree(p_ooo_info->p_isles_mem);
269 kfree(p_ooo_info->p_archipelagos_mem);
270 kfree(p_ooo_info->ooo_history.p_cqes);
271 kfree(p_ooo_info);
272 p_hwfn->p_ooo_info = NULL;
273 }
274
qed_ooo_put_free_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,struct qed_ooo_buffer * p_buffer)275 void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
276 struct qed_ooo_info *p_ooo_info,
277 struct qed_ooo_buffer *p_buffer)
278 {
279 list_add_tail(&p_buffer->list_entry, &p_ooo_info->free_buffers_list);
280 }
281
qed_ooo_get_free_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info)282 struct qed_ooo_buffer *qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
283 struct qed_ooo_info *p_ooo_info)
284 {
285 struct qed_ooo_buffer *p_buffer = NULL;
286
287 if (!list_empty(&p_ooo_info->free_buffers_list)) {
288 p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
289 struct qed_ooo_buffer, list_entry);
290
291 list_del(&p_buffer->list_entry);
292 }
293
294 return p_buffer;
295 }
296
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)297 void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
298 struct qed_ooo_info *p_ooo_info,
299 struct qed_ooo_buffer *p_buffer, u8 on_tail)
300 {
301 if (on_tail)
302 list_add_tail(&p_buffer->list_entry,
303 &p_ooo_info->ready_buffers_list);
304 else
305 list_add(&p_buffer->list_entry,
306 &p_ooo_info->ready_buffers_list);
307 }
308
qed_ooo_get_ready_buffer(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info)309 struct qed_ooo_buffer *qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
310 struct qed_ooo_info *p_ooo_info)
311 {
312 struct qed_ooo_buffer *p_buffer = NULL;
313
314 if (!list_empty(&p_ooo_info->ready_buffers_list)) {
315 p_buffer = list_first_entry(&p_ooo_info->ready_buffers_list,
316 struct qed_ooo_buffer, list_entry);
317
318 list_del(&p_buffer->list_entry);
319 }
320
321 return p_buffer;
322 }
323
qed_ooo_delete_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid,u8 drop_isle,u8 drop_size)324 void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
325 struct qed_ooo_info *p_ooo_info,
326 u32 cid, u8 drop_isle, u8 drop_size)
327 {
328 struct qed_ooo_isle *p_isle = NULL;
329 u8 isle_idx;
330
331 for (isle_idx = 0; isle_idx < drop_size; isle_idx++) {
332 p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, drop_isle);
333 if (!p_isle) {
334 DP_NOTICE(p_hwfn,
335 "Isle %d is not found(cid %d)\n",
336 drop_isle, cid);
337 return;
338 }
339 if (list_empty(&p_isle->buffers_list))
340 DP_NOTICE(p_hwfn,
341 "Isle %d is empty(cid %d)\n", drop_isle, cid);
342 else
343 list_splice_tail_init(&p_isle->buffers_list,
344 &p_ooo_info->free_buffers_list);
345
346 list_del(&p_isle->list_entry);
347 p_ooo_info->cur_isles_number--;
348 list_add(&p_isle->list_entry, &p_ooo_info->free_isles_list);
349 }
350 }
351
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)352 void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
353 struct qed_ooo_info *p_ooo_info,
354 u32 cid, u8 ooo_isle,
355 struct qed_ooo_buffer *p_buffer)
356 {
357 struct qed_ooo_archipelago *p_archipelago = NULL;
358 struct qed_ooo_isle *p_prev_isle = NULL;
359 struct qed_ooo_isle *p_isle = NULL;
360
361 if (ooo_isle > 1) {
362 p_prev_isle = qed_ooo_seek_isle(p_hwfn,
363 p_ooo_info, cid, ooo_isle - 1);
364 if (!p_prev_isle) {
365 DP_NOTICE(p_hwfn,
366 "Isle %d is not found(cid %d)\n",
367 ooo_isle - 1, cid);
368 return;
369 }
370 }
371 p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
372 if (!p_archipelago && (ooo_isle != 1)) {
373 DP_NOTICE(p_hwfn,
374 "Connection %d is not found in OOO list\n", cid);
375 return;
376 }
377
378 if (!list_empty(&p_ooo_info->free_isles_list)) {
379 p_isle = list_first_entry(&p_ooo_info->free_isles_list,
380 struct qed_ooo_isle, list_entry);
381
382 list_del(&p_isle->list_entry);
383 if (!list_empty(&p_isle->buffers_list)) {
384 DP_NOTICE(p_hwfn, "Free isle is not empty\n");
385 INIT_LIST_HEAD(&p_isle->buffers_list);
386 }
387 } else {
388 DP_NOTICE(p_hwfn, "No more free isles\n");
389 return;
390 }
391
392 if (!p_archipelago) {
393 u32 idx = (cid & 0xffff) - p_ooo_info->cid_base;
394
395 p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
396 }
397
398 list_add(&p_buffer->list_entry, &p_isle->buffers_list);
399 p_ooo_info->cur_isles_number++;
400 p_ooo_info->gen_isles_number++;
401
402 if (p_ooo_info->cur_isles_number > p_ooo_info->max_isles_number)
403 p_ooo_info->max_isles_number = p_ooo_info->cur_isles_number;
404
405 if (!p_prev_isle)
406 list_add(&p_isle->list_entry, &p_archipelago->isles_list);
407 else
408 list_add(&p_isle->list_entry, &p_prev_isle->list_entry);
409 }
410
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)411 void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
412 struct qed_ooo_info *p_ooo_info,
413 u32 cid,
414 u8 ooo_isle,
415 struct qed_ooo_buffer *p_buffer, u8 buffer_side)
416 {
417 struct qed_ooo_isle *p_isle = NULL;
418
419 p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, ooo_isle);
420 if (!p_isle) {
421 DP_NOTICE(p_hwfn,
422 "Isle %d is not found(cid %d)\n", ooo_isle, cid);
423 return;
424 }
425
426 if (buffer_side == QED_OOO_LEFT_BUF)
427 list_add(&p_buffer->list_entry, &p_isle->buffers_list);
428 else
429 list_add_tail(&p_buffer->list_entry, &p_isle->buffers_list);
430 }
431
qed_ooo_join_isles(struct qed_hwfn * p_hwfn,struct qed_ooo_info * p_ooo_info,u32 cid,u8 left_isle)432 void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
433 struct qed_ooo_info *p_ooo_info, u32 cid, u8 left_isle)
434 {
435 struct qed_ooo_isle *p_right_isle = NULL;
436 struct qed_ooo_isle *p_left_isle = NULL;
437
438 p_right_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
439 left_isle + 1);
440 if (!p_right_isle) {
441 DP_NOTICE(p_hwfn,
442 "Right isle %d is not found(cid %d)\n",
443 left_isle + 1, cid);
444 return;
445 }
446
447 list_del(&p_right_isle->list_entry);
448 p_ooo_info->cur_isles_number--;
449 if (left_isle) {
450 p_left_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
451 left_isle);
452 if (!p_left_isle) {
453 DP_NOTICE(p_hwfn,
454 "Left isle %d is not found(cid %d)\n",
455 left_isle, cid);
456 return;
457 }
458 list_splice_tail_init(&p_right_isle->buffers_list,
459 &p_left_isle->buffers_list);
460 } else {
461 list_splice_tail_init(&p_right_isle->buffers_list,
462 &p_ooo_info->ready_buffers_list);
463 }
464 list_add_tail(&p_right_isle->list_entry, &p_ooo_info->free_isles_list);
465 }
466