Merge branch 'mlx5-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox...
[sfrench/cifs-2.6.git] / drivers / net / ethernet / qlogic / qed / qed_init_ops.c
1 /* QLogic qed NIC Driver
2  * Copyright (c) 2015-2017  QLogic Corporation
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and /or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32
33 #include <linux/types.h>
34 #include <linux/io.h>
35 #include <linux/delay.h>
36 #include <linux/errno.h>
37 #include <linux/kernel.h>
38 #include <linux/slab.h>
39 #include <linux/string.h>
40 #include "qed.h"
41 #include "qed_hsi.h"
42 #include "qed_hw.h"
43 #include "qed_init_ops.h"
44 #include "qed_reg_addr.h"
45 #include "qed_sriov.h"
46
47 #define QED_INIT_MAX_POLL_COUNT 100
48 #define QED_INIT_POLL_PERIOD_US 500
49
50 static u32 pxp_global_win[] = {
51         0,
52         0,
53         0x1c02, /* win 2: addr=0x1c02000, size=4096 bytes */
54         0x1c80, /* win 3: addr=0x1c80000, size=4096 bytes */
55         0x1d00, /* win 4: addr=0x1d00000, size=4096 bytes */
56         0x1d01, /* win 5: addr=0x1d01000, size=4096 bytes */
57         0x1d80, /* win 6: addr=0x1d80000, size=4096 bytes */
58         0x1d81, /* win 7: addr=0x1d81000, size=4096 bytes */
59         0x1d82, /* win 8: addr=0x1d82000, size=4096 bytes */
60         0x1e00, /* win 9: addr=0x1e00000, size=4096 bytes */
61         0x1e80, /* win 10: addr=0x1e80000, size=4096 bytes */
62         0x1f00, /* win 11: addr=0x1f00000, size=4096 bytes */
63         0,
64         0,
65         0,
66         0,
67         0,
68         0,
69         0,
70 };
71
72 void qed_init_iro_array(struct qed_dev *cdev)
73 {
74         cdev->iro_arr = iro_arr;
75 }
76
77 /* Runtime configuration helpers */
78 void qed_init_clear_rt_data(struct qed_hwfn *p_hwfn)
79 {
80         int i;
81
82         for (i = 0; i < RUNTIME_ARRAY_SIZE; i++)
83                 p_hwfn->rt_data.b_valid[i] = false;
84 }
85
86 void qed_init_store_rt_reg(struct qed_hwfn *p_hwfn, u32 rt_offset, u32 val)
87 {
88         p_hwfn->rt_data.init_val[rt_offset] = val;
89         p_hwfn->rt_data.b_valid[rt_offset] = true;
90 }
91
92 void qed_init_store_rt_agg(struct qed_hwfn *p_hwfn,
93                            u32 rt_offset, u32 *p_val, size_t size)
94 {
95         size_t i;
96
97         for (i = 0; i < size / sizeof(u32); i++) {
98                 p_hwfn->rt_data.init_val[rt_offset + i] = p_val[i];
99                 p_hwfn->rt_data.b_valid[rt_offset + i]  = true;
100         }
101 }
102
103 static int qed_init_rt(struct qed_hwfn  *p_hwfn,
104                        struct qed_ptt *p_ptt,
105                        u32 addr, u16 rt_offset, u16 size, bool b_must_dmae)
106 {
107         u32 *p_init_val = &p_hwfn->rt_data.init_val[rt_offset];
108         bool *p_valid = &p_hwfn->rt_data.b_valid[rt_offset];
109         u16 i, segment;
110         int rc = 0;
111
112         /* Since not all RT entries are initialized, go over the RT and
113          * for each segment of initialized values use DMA.
114          */
115         for (i = 0; i < size; i++) {
116                 if (!p_valid[i])
117                         continue;
118
119                 /* In case there isn't any wide-bus configuration here,
120                  * simply write the data instead of using dmae.
121                  */
122                 if (!b_must_dmae) {
123                         qed_wr(p_hwfn, p_ptt, addr + (i << 2), p_init_val[i]);
124                         continue;
125                 }
126
127                 /* Start of a new segment */
128                 for (segment = 1; i + segment < size; segment++)
129                         if (!p_valid[i + segment])
130                                 break;
131
132                 rc = qed_dmae_host2grc(p_hwfn, p_ptt,
133                                        (uintptr_t)(p_init_val + i),
134                                        addr + (i << 2), segment, 0);
135                 if (rc)
136                         return rc;
137
138                 /* Jump over the entire segment, including invalid entry */
139                 i += segment;
140         }
141
142         return rc;
143 }
144
145 int qed_init_alloc(struct qed_hwfn *p_hwfn)
146 {
147         struct qed_rt_data *rt_data = &p_hwfn->rt_data;
148
149         if (IS_VF(p_hwfn->cdev))
150                 return 0;
151
152         rt_data->b_valid = kcalloc(RUNTIME_ARRAY_SIZE, sizeof(bool),
153                                    GFP_KERNEL);
154         if (!rt_data->b_valid)
155                 return -ENOMEM;
156
157         rt_data->init_val = kcalloc(RUNTIME_ARRAY_SIZE, sizeof(u32),
158                                     GFP_KERNEL);
159         if (!rt_data->init_val) {
160                 kfree(rt_data->b_valid);
161                 rt_data->b_valid = NULL;
162                 return -ENOMEM;
163         }
164
165         return 0;
166 }
167
168 void qed_init_free(struct qed_hwfn *p_hwfn)
169 {
170         kfree(p_hwfn->rt_data.init_val);
171         p_hwfn->rt_data.init_val = NULL;
172         kfree(p_hwfn->rt_data.b_valid);
173         p_hwfn->rt_data.b_valid = NULL;
174 }
175
176 static int qed_init_array_dmae(struct qed_hwfn *p_hwfn,
177                                struct qed_ptt *p_ptt,
178                                u32 addr,
179                                u32 dmae_data_offset,
180                                u32 size,
181                                const u32 *buf,
182                                bool b_must_dmae,
183                                bool b_can_dmae)
184 {
185         int rc = 0;
186
187         /* Perform DMAE only for lengthy enough sections or for wide-bus */
188         if (!b_can_dmae || (!b_must_dmae && (size < 16))) {
189                 const u32 *data = buf + dmae_data_offset;
190                 u32 i;
191
192                 for (i = 0; i < size; i++)
193                         qed_wr(p_hwfn, p_ptt, addr + (i << 2), data[i]);
194         } else {
195                 rc = qed_dmae_host2grc(p_hwfn, p_ptt,
196                                        (uintptr_t)(buf + dmae_data_offset),
197                                        addr, size, 0);
198         }
199
200         return rc;
201 }
202
203 static int qed_init_fill_dmae(struct qed_hwfn *p_hwfn,
204                               struct qed_ptt *p_ptt,
205                               u32 addr, u32 fill, u32 fill_count)
206 {
207         static u32 zero_buffer[DMAE_MAX_RW_SIZE];
208
209         memset(zero_buffer, 0, sizeof(u32) * DMAE_MAX_RW_SIZE);
210
211         /* invoke the DMAE virtual/physical buffer API with
212          * 1. DMAE init channel
213          * 2. addr,
214          * 3. p_hwfb->temp_data,
215          * 4. fill_count
216          */
217
218         return qed_dmae_host2grc(p_hwfn, p_ptt,
219                                  (uintptr_t)(&zero_buffer[0]),
220                                  addr, fill_count, QED_DMAE_FLAG_RW_REPL_SRC);
221 }
222
223 static void qed_init_fill(struct qed_hwfn *p_hwfn,
224                           struct qed_ptt *p_ptt,
225                           u32 addr, u32 fill, u32 fill_count)
226 {
227         u32 i;
228
229         for (i = 0; i < fill_count; i++, addr += sizeof(u32))
230                 qed_wr(p_hwfn, p_ptt, addr, fill);
231 }
232
233 static int qed_init_cmd_array(struct qed_hwfn *p_hwfn,
234                               struct qed_ptt *p_ptt,
235                               struct init_write_op *cmd,
236                               bool b_must_dmae, bool b_can_dmae)
237 {
238         u32 dmae_array_offset = le32_to_cpu(cmd->args.array_offset);
239         u32 data = le32_to_cpu(cmd->data);
240         u32 addr = GET_FIELD(data, INIT_WRITE_OP_ADDRESS) << 2;
241
242         u32 offset, output_len, input_len, max_size;
243         struct qed_dev *cdev = p_hwfn->cdev;
244         union init_array_hdr *hdr;
245         const u32 *array_data;
246         int rc = 0;
247         u32 size;
248
249         array_data = cdev->fw_data->arr_data;
250
251         hdr = (union init_array_hdr *)(array_data + dmae_array_offset);
252         data = le32_to_cpu(hdr->raw.data);
253         switch (GET_FIELD(data, INIT_ARRAY_RAW_HDR_TYPE)) {
254         case INIT_ARR_ZIPPED:
255                 offset = dmae_array_offset + 1;
256                 input_len = GET_FIELD(data,
257                                       INIT_ARRAY_ZIPPED_HDR_ZIPPED_SIZE);
258                 max_size = MAX_ZIPPED_SIZE * 4;
259                 memset(p_hwfn->unzip_buf, 0, max_size);
260
261                 output_len = qed_unzip_data(p_hwfn, input_len,
262                                             (u8 *)&array_data[offset],
263                                             max_size, (u8 *)p_hwfn->unzip_buf);
264                 if (output_len) {
265                         rc = qed_init_array_dmae(p_hwfn, p_ptt, addr, 0,
266                                                  output_len,
267                                                  p_hwfn->unzip_buf,
268                                                  b_must_dmae, b_can_dmae);
269                 } else {
270                         DP_NOTICE(p_hwfn, "Failed to unzip dmae data\n");
271                         rc = -EINVAL;
272                 }
273                 break;
274         case INIT_ARR_PATTERN:
275         {
276                 u32 repeats = GET_FIELD(data,
277                                         INIT_ARRAY_PATTERN_HDR_REPETITIONS);
278                 u32 i;
279
280                 size = GET_FIELD(data, INIT_ARRAY_PATTERN_HDR_PATTERN_SIZE);
281
282                 for (i = 0; i < repeats; i++, addr += size << 2) {
283                         rc = qed_init_array_dmae(p_hwfn, p_ptt, addr,
284                                                  dmae_array_offset + 1,
285                                                  size, array_data,
286                                                  b_must_dmae, b_can_dmae);
287                         if (rc)
288                                 break;
289                 }
290                 break;
291         }
292         case INIT_ARR_STANDARD:
293                 size = GET_FIELD(data, INIT_ARRAY_STANDARD_HDR_SIZE);
294                 rc = qed_init_array_dmae(p_hwfn, p_ptt, addr,
295                                          dmae_array_offset + 1,
296                                          size, array_data,
297                                          b_must_dmae, b_can_dmae);
298                 break;
299         }
300
301         return rc;
302 }
303
304 /* init_ops write command */
305 static int qed_init_cmd_wr(struct qed_hwfn *p_hwfn,
306                            struct qed_ptt *p_ptt,
307                            struct init_write_op *p_cmd, bool b_can_dmae)
308 {
309         u32 data = le32_to_cpu(p_cmd->data);
310         bool b_must_dmae = GET_FIELD(data, INIT_WRITE_OP_WIDE_BUS);
311         u32 addr = GET_FIELD(data, INIT_WRITE_OP_ADDRESS) << 2;
312         union init_write_args *arg = &p_cmd->args;
313         int rc = 0;
314
315         /* Sanitize */
316         if (b_must_dmae && !b_can_dmae) {
317                 DP_NOTICE(p_hwfn,
318                           "Need to write to %08x for Wide-bus but DMAE isn't allowed\n",
319                           addr);
320                 return -EINVAL;
321         }
322
323         switch (GET_FIELD(data, INIT_WRITE_OP_SOURCE)) {
324         case INIT_SRC_INLINE:
325                 data = le32_to_cpu(p_cmd->args.inline_val);
326                 qed_wr(p_hwfn, p_ptt, addr, data);
327                 break;
328         case INIT_SRC_ZEROS:
329                 data = le32_to_cpu(p_cmd->args.zeros_count);
330                 if (b_must_dmae || (b_can_dmae && (data >= 64)))
331                         rc = qed_init_fill_dmae(p_hwfn, p_ptt, addr, 0, data);
332                 else
333                         qed_init_fill(p_hwfn, p_ptt, addr, 0, data);
334                 break;
335         case INIT_SRC_ARRAY:
336                 rc = qed_init_cmd_array(p_hwfn, p_ptt, p_cmd,
337                                         b_must_dmae, b_can_dmae);
338                 break;
339         case INIT_SRC_RUNTIME:
340                 qed_init_rt(p_hwfn, p_ptt, addr,
341                             le16_to_cpu(arg->runtime.offset),
342                             le16_to_cpu(arg->runtime.size),
343                             b_must_dmae);
344                 break;
345         }
346
347         return rc;
348 }
349
350 static inline bool comp_eq(u32 val, u32 expected_val)
351 {
352         return val == expected_val;
353 }
354
355 static inline bool comp_and(u32 val, u32 expected_val)
356 {
357         return (val & expected_val) == expected_val;
358 }
359
360 static inline bool comp_or(u32 val, u32 expected_val)
361 {
362         return (val | expected_val) > 0;
363 }
364
365 /* init_ops read/poll commands */
366 static void qed_init_cmd_rd(struct qed_hwfn *p_hwfn,
367                             struct qed_ptt *p_ptt, struct init_read_op *cmd)
368 {
369         bool (*comp_check)(u32 val, u32 expected_val);
370         u32 delay = QED_INIT_POLL_PERIOD_US, val;
371         u32 data, addr, poll;
372         int i;
373
374         data = le32_to_cpu(cmd->op_data);
375         addr = GET_FIELD(data, INIT_READ_OP_ADDRESS) << 2;
376         poll = GET_FIELD(data, INIT_READ_OP_POLL_TYPE);
377
378
379         val = qed_rd(p_hwfn, p_ptt, addr);
380
381         if (poll == INIT_POLL_NONE)
382                 return;
383
384         switch (poll) {
385         case INIT_POLL_EQ:
386                 comp_check = comp_eq;
387                 break;
388         case INIT_POLL_OR:
389                 comp_check = comp_or;
390                 break;
391         case INIT_POLL_AND:
392                 comp_check = comp_and;
393                 break;
394         default:
395                 DP_ERR(p_hwfn, "Invalid poll comparison type %08x\n",
396                        cmd->op_data);
397                 return;
398         }
399
400         data = le32_to_cpu(cmd->expected_val);
401         for (i = 0;
402              i < QED_INIT_MAX_POLL_COUNT && !comp_check(val, data);
403              i++) {
404                 udelay(delay);
405                 val = qed_rd(p_hwfn, p_ptt, addr);
406         }
407
408         if (i == QED_INIT_MAX_POLL_COUNT) {
409                 DP_ERR(p_hwfn,
410                        "Timeout when polling reg: 0x%08x [ Waiting-for: %08x Got: %08x (comparison %08x)]\n",
411                        addr, le32_to_cpu(cmd->expected_val),
412                        val, le32_to_cpu(cmd->op_data));
413         }
414 }
415
416 /* init_ops callbacks entry point */
417 static int qed_init_cmd_cb(struct qed_hwfn *p_hwfn,
418                            struct qed_ptt *p_ptt,
419                            struct init_callback_op *p_cmd)
420 {
421         int rc;
422
423         switch (p_cmd->callback_id) {
424         case DMAE_READY_CB:
425                 rc = qed_dmae_sanity(p_hwfn, p_ptt, "engine_phase");
426                 break;
427         default:
428                 DP_NOTICE(p_hwfn, "Unexpected init op callback ID %d\n",
429                           p_cmd->callback_id);
430                 return -EINVAL;
431         }
432
433         return rc;
434 }
435
436 static u8 qed_init_cmd_mode_match(struct qed_hwfn *p_hwfn,
437                                   u16 *p_offset, int modes)
438 {
439         struct qed_dev *cdev = p_hwfn->cdev;
440         const u8 *modes_tree_buf;
441         u8 arg1, arg2, tree_val;
442
443         modes_tree_buf = cdev->fw_data->modes_tree_buf;
444         tree_val = modes_tree_buf[(*p_offset)++];
445         switch (tree_val) {
446         case INIT_MODE_OP_NOT:
447                 return qed_init_cmd_mode_match(p_hwfn, p_offset, modes) ^ 1;
448         case INIT_MODE_OP_OR:
449                 arg1 = qed_init_cmd_mode_match(p_hwfn, p_offset, modes);
450                 arg2 = qed_init_cmd_mode_match(p_hwfn, p_offset, modes);
451                 return arg1 | arg2;
452         case INIT_MODE_OP_AND:
453                 arg1 = qed_init_cmd_mode_match(p_hwfn, p_offset, modes);
454                 arg2 = qed_init_cmd_mode_match(p_hwfn, p_offset, modes);
455                 return arg1 & arg2;
456         default:
457                 tree_val -= MAX_INIT_MODE_OPS;
458                 return (modes & BIT(tree_val)) ? 1 : 0;
459         }
460 }
461
462 static u32 qed_init_cmd_mode(struct qed_hwfn *p_hwfn,
463                              struct init_if_mode_op *p_cmd, int modes)
464 {
465         u16 offset = le16_to_cpu(p_cmd->modes_buf_offset);
466
467         if (qed_init_cmd_mode_match(p_hwfn, &offset, modes))
468                 return 0;
469         else
470                 return GET_FIELD(le32_to_cpu(p_cmd->op_data),
471                                  INIT_IF_MODE_OP_CMD_OFFSET);
472 }
473
474 static u32 qed_init_cmd_phase(struct qed_hwfn *p_hwfn,
475                               struct init_if_phase_op *p_cmd,
476                               u32 phase, u32 phase_id)
477 {
478         u32 data = le32_to_cpu(p_cmd->phase_data);
479         u32 op_data = le32_to_cpu(p_cmd->op_data);
480
481         if (!(GET_FIELD(data, INIT_IF_PHASE_OP_PHASE) == phase &&
482               (GET_FIELD(data, INIT_IF_PHASE_OP_PHASE_ID) == ANY_PHASE_ID ||
483                GET_FIELD(data, INIT_IF_PHASE_OP_PHASE_ID) == phase_id)))
484                 return GET_FIELD(op_data, INIT_IF_PHASE_OP_CMD_OFFSET);
485         else
486                 return 0;
487 }
488
489 int qed_init_run(struct qed_hwfn *p_hwfn,
490                  struct qed_ptt *p_ptt, int phase, int phase_id, int modes)
491 {
492         struct qed_dev *cdev = p_hwfn->cdev;
493         u32 cmd_num, num_init_ops;
494         union init_op *init_ops;
495         bool b_dmae = false;
496         int rc = 0;
497
498         num_init_ops = cdev->fw_data->init_ops_size;
499         init_ops = cdev->fw_data->init_ops;
500
501         p_hwfn->unzip_buf = kzalloc(MAX_ZIPPED_SIZE * 4, GFP_ATOMIC);
502         if (!p_hwfn->unzip_buf)
503                 return -ENOMEM;
504
505         for (cmd_num = 0; cmd_num < num_init_ops; cmd_num++) {
506                 union init_op *cmd = &init_ops[cmd_num];
507                 u32 data = le32_to_cpu(cmd->raw.op_data);
508
509                 switch (GET_FIELD(data, INIT_CALLBACK_OP_OP)) {
510                 case INIT_OP_WRITE:
511                         rc = qed_init_cmd_wr(p_hwfn, p_ptt, &cmd->write,
512                                              b_dmae);
513                         break;
514                 case INIT_OP_READ:
515                         qed_init_cmd_rd(p_hwfn, p_ptt, &cmd->read);
516                         break;
517                 case INIT_OP_IF_MODE:
518                         cmd_num += qed_init_cmd_mode(p_hwfn, &cmd->if_mode,
519                                                      modes);
520                         break;
521                 case INIT_OP_IF_PHASE:
522                         cmd_num += qed_init_cmd_phase(p_hwfn, &cmd->if_phase,
523                                                       phase, phase_id);
524                         b_dmae = GET_FIELD(data, INIT_IF_PHASE_OP_DMAE_ENABLE);
525                         break;
526                 case INIT_OP_DELAY:
527                         /* qed_init_run is always invoked from
528                          * sleep-able context
529                          */
530                         udelay(le32_to_cpu(cmd->delay.delay));
531                         break;
532
533                 case INIT_OP_CALLBACK:
534                         rc = qed_init_cmd_cb(p_hwfn, p_ptt, &cmd->callback);
535                         break;
536                 }
537
538                 if (rc)
539                         break;
540         }
541
542         kfree(p_hwfn->unzip_buf);
543         p_hwfn->unzip_buf = NULL;
544         return rc;
545 }
546
547 void qed_gtt_init(struct qed_hwfn *p_hwfn)
548 {
549         u32 gtt_base;
550         u32 i;
551
552         /* Set the global windows */
553         gtt_base = PXP_PF_WINDOW_ADMIN_START + PXP_PF_WINDOW_ADMIN_GLOBAL_START;
554
555         for (i = 0; i < ARRAY_SIZE(pxp_global_win); i++)
556                 if (pxp_global_win[i])
557                         REG_WR(p_hwfn, gtt_base + i * PXP_GLOBAL_ENTRY_SIZE,
558                                pxp_global_win[i]);
559 }
560
561 int qed_init_fw_data(struct qed_dev *cdev, const u8 *data)
562 {
563         struct qed_fw_data *fw = cdev->fw_data;
564         struct bin_buffer_hdr *buf_hdr;
565         u32 offset, len;
566
567         if (!data) {
568                 DP_NOTICE(cdev, "Invalid fw data\n");
569                 return -EINVAL;
570         }
571
572         /* First Dword contains metadata and should be skipped */
573         buf_hdr = (struct bin_buffer_hdr *)data;
574
575         offset = buf_hdr[BIN_BUF_INIT_FW_VER_INFO].offset;
576         fw->fw_ver_info = (struct fw_ver_info *)(data + offset);
577
578         offset = buf_hdr[BIN_BUF_INIT_CMD].offset;
579         fw->init_ops = (union init_op *)(data + offset);
580
581         offset = buf_hdr[BIN_BUF_INIT_VAL].offset;
582         fw->arr_data = (u32 *)(data + offset);
583
584         offset = buf_hdr[BIN_BUF_INIT_MODE_TREE].offset;
585         fw->modes_tree_buf = (u8 *)(data + offset);
586         len = buf_hdr[BIN_BUF_INIT_CMD].length;
587         fw->init_ops_size = len / sizeof(struct init_raw_op);
588
589         return 0;
590 }