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WIP FPC-III support
[linux/fpc-iii.git] / drivers / net / ethernet / qlogic / qed / qed_hw.c
blob554f30b0cfd5e7c41c8dba31e503815fb929974a
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/io.h>
9 #include <linux/delay.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/errno.h>
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/mutex.h>
15 #include <linux/pci.h>
16 #include <linux/slab.h>
17 #include <linux/spinlock.h>
18 #include <linux/string.h>
19 #include <linux/qed/qed_chain.h>
20 #include "qed.h"
21 #include "qed_hsi.h"
22 #include "qed_hw.h"
23 #include "qed_reg_addr.h"
24 #include "qed_sriov.h"
25
26 #define QED_BAR_ACQUIRE_TIMEOUT 1000
27
28 /* Invalid values */
29 #define QED_BAR_INVALID_OFFSET (cpu_to_le32(-1))
30
31 struct qed_ptt {
32 struct list_head list_entry;
33 unsigned int idx;
34 struct pxp_ptt_entry pxp;
35 u8 hwfn_id;
36 };
37
38 struct qed_ptt_pool {
39 struct list_head free_list;
40 spinlock_t lock; /* ptt synchronized access */
41 struct qed_ptt ptts[PXP_EXTERNAL_BAR_PF_WINDOW_NUM];
42 };
43
44 int qed_ptt_pool_alloc(struct qed_hwfn *p_hwfn)
45 {
46 struct qed_ptt_pool *p_pool = kmalloc(sizeof(*p_pool), GFP_KERNEL);
47 int i;
48
49 if (!p_pool)
50 return -ENOMEM;
51
52 INIT_LIST_HEAD(&p_pool->free_list);
53 for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
54 p_pool->ptts[i].idx = i;
55 p_pool->ptts[i].pxp.offset = QED_BAR_INVALID_OFFSET;
56 p_pool->ptts[i].pxp.pretend.control = 0;
57 p_pool->ptts[i].hwfn_id = p_hwfn->my_id;
58 if (i >= RESERVED_PTT_MAX)
59 list_add(&p_pool->ptts[i].list_entry,
60 &p_pool->free_list);
61 }
62
63 p_hwfn->p_ptt_pool = p_pool;
64 spin_lock_init(&p_pool->lock);
65
66 return 0;
67 }
68
69 void qed_ptt_invalidate(struct qed_hwfn *p_hwfn)
70 {
71 struct qed_ptt *p_ptt;
72 int i;
73
74 for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
75 p_ptt = &p_hwfn->p_ptt_pool->ptts[i];
76 p_ptt->pxp.offset = QED_BAR_INVALID_OFFSET;
77 }
78 }
79
80 void qed_ptt_pool_free(struct qed_hwfn *p_hwfn)
81 {
82 kfree(p_hwfn->p_ptt_pool);
83 p_hwfn->p_ptt_pool = NULL;
84 }
85
86 struct qed_ptt *qed_ptt_acquire(struct qed_hwfn *p_hwfn)
87 {
88 struct qed_ptt *p_ptt;
89 unsigned int i;
90
91 /* Take the free PTT from the list */
92 for (i = 0; i < QED_BAR_ACQUIRE_TIMEOUT; i++) {
93 spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
94
95 if (!list_empty(&p_hwfn->p_ptt_pool->free_list)) {
96 p_ptt = list_first_entry(&p_hwfn->p_ptt_pool->free_list,
97 struct qed_ptt, list_entry);
98 list_del(&p_ptt->list_entry);
99
100 spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
101
102 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
103 "allocated ptt %d\n", p_ptt->idx);
104 return p_ptt;
105 }
106
107 spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
108 usleep_range(1000, 2000);
109 }
110
111 DP_NOTICE(p_hwfn, "PTT acquire timeout - failed to allocate PTT\n");
112 return NULL;
113 }
114
115 void qed_ptt_release(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
116 {
117 spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
118 list_add(&p_ptt->list_entry, &p_hwfn->p_ptt_pool->free_list);
119 spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
120 }
121
122 u32 qed_ptt_get_hw_addr(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
123 {
124 /* The HW is using DWORDS and we need to translate it to Bytes */
125 return le32_to_cpu(p_ptt->pxp.offset) << 2;
126 }
127
128 static u32 qed_ptt_config_addr(struct qed_ptt *p_ptt)
129 {
130 return PXP_PF_WINDOW_ADMIN_PER_PF_START +
131 p_ptt->idx * sizeof(struct pxp_ptt_entry);
132 }
133
134 u32 qed_ptt_get_bar_addr(struct qed_ptt *p_ptt)
135 {
136 return PXP_EXTERNAL_BAR_PF_WINDOW_START +
137 p_ptt->idx * PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE;
138 }
139
140 void qed_ptt_set_win(struct qed_hwfn *p_hwfn,
141 struct qed_ptt *p_ptt, u32 new_hw_addr)
142 {
143 u32 prev_hw_addr;
144
145 prev_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
146
147 if (new_hw_addr == prev_hw_addr)
148 return;
149
150 /* Update PTT entery in admin window */
151 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
152 "Updating PTT entry %d to offset 0x%x\n",
153 p_ptt->idx, new_hw_addr);
154
155 /* The HW is using DWORDS and the address is in Bytes */
156 p_ptt->pxp.offset = cpu_to_le32(new_hw_addr >> 2);
157
158 REG_WR(p_hwfn,
159 qed_ptt_config_addr(p_ptt) +
160 offsetof(struct pxp_ptt_entry, offset),
161 le32_to_cpu(p_ptt->pxp.offset));
162 }
163
164 static u32 qed_set_ptt(struct qed_hwfn *p_hwfn,
165 struct qed_ptt *p_ptt, u32 hw_addr)
166 {
167 u32 win_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
168 u32 offset;
169
170 offset = hw_addr - win_hw_addr;
171
172 if (p_ptt->hwfn_id != p_hwfn->my_id)
173 DP_NOTICE(p_hwfn,
174 "ptt[%d] of hwfn[%02x] is used by hwfn[%02x]!\n",
175 p_ptt->idx, p_ptt->hwfn_id, p_hwfn->my_id);
176
177 /* Verify the address is within the window */
178 if (hw_addr < win_hw_addr ||
179 offset >= PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE) {
180 qed_ptt_set_win(p_hwfn, p_ptt, hw_addr);
181 offset = 0;
182 }
183
184 return qed_ptt_get_bar_addr(p_ptt) + offset;
185 }
186
187 struct qed_ptt *qed_get_reserved_ptt(struct qed_hwfn *p_hwfn,
188 enum reserved_ptts ptt_idx)
189 {
190 if (ptt_idx >= RESERVED_PTT_MAX) {
191 DP_NOTICE(p_hwfn,
192 "Requested PTT %d is out of range\n", ptt_idx);
193 return NULL;
194 }
195
196 return &p_hwfn->p_ptt_pool->ptts[ptt_idx];
197 }
198
199 void qed_wr(struct qed_hwfn *p_hwfn,
200 struct qed_ptt *p_ptt,
201 u32 hw_addr, u32 val)
202 {
203 u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
204
205 REG_WR(p_hwfn, bar_addr, val);
206 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
207 "bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
208 bar_addr, hw_addr, val);
209 }
210
211 u32 qed_rd(struct qed_hwfn *p_hwfn,
212 struct qed_ptt *p_ptt,
213 u32 hw_addr)
214 {
215 u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
216 u32 val = REG_RD(p_hwfn, bar_addr);
217
218 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
219 "bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
220 bar_addr, hw_addr, val);
221
222 return val;
223 }
224
225 static void qed_memcpy_hw(struct qed_hwfn *p_hwfn,
226 struct qed_ptt *p_ptt,
227 void *addr, u32 hw_addr, size_t n, bool to_device)
228 {
229 u32 dw_count, *host_addr, hw_offset;
230 size_t quota, done = 0;
231 u32 __iomem *reg_addr;
232
233 while (done < n) {
234 quota = min_t(size_t, n - done,
235 PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE);
236
237 if (IS_PF(p_hwfn->cdev)) {
238 qed_ptt_set_win(p_hwfn, p_ptt, hw_addr + done);
239 hw_offset = qed_ptt_get_bar_addr(p_ptt);
240 } else {
241 hw_offset = hw_addr + done;
242 }
243
244 dw_count = quota / 4;
245 host_addr = (u32 *)((u8 *)addr + done);
246 reg_addr = (u32 __iomem *)REG_ADDR(p_hwfn, hw_offset);
247 if (to_device)
248 while (dw_count--)
249 DIRECT_REG_WR(reg_addr++, *host_addr++);
250 else
251 while (dw_count--)
252 *host_addr++ = DIRECT_REG_RD(reg_addr++);
253
254 done += quota;
255 }
256 }
257
258 void qed_memcpy_from(struct qed_hwfn *p_hwfn,
259 struct qed_ptt *p_ptt, void *dest, u32 hw_addr, size_t n)
260 {
261 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
262 "hw_addr 0x%x, dest %p hw_addr 0x%x, size %lu\n",
263 hw_addr, dest, hw_addr, (unsigned long)n);
264
265 qed_memcpy_hw(p_hwfn, p_ptt, dest, hw_addr, n, false);
266 }
267
268 void qed_memcpy_to(struct qed_hwfn *p_hwfn,
269 struct qed_ptt *p_ptt, u32 hw_addr, void *src, size_t n)
270 {
271 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
272 "hw_addr 0x%x, hw_addr 0x%x, src %p size %lu\n",
273 hw_addr, hw_addr, src, (unsigned long)n);
274
275 qed_memcpy_hw(p_hwfn, p_ptt, src, hw_addr, n, true);
276 }
277
278 void qed_fid_pretend(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, u16 fid)
279 {
280 u16 control = 0;
281
282 SET_FIELD(control, PXP_PRETEND_CMD_IS_CONCRETE, 1);
283 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_FUNCTION, 1);
284
285 /* Every pretend undos previous pretends, including
286 * previous port pretend.
287 */
288 SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
289 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
290 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
291
292 if (!GET_FIELD(fid, PXP_CONCRETE_FID_VFVALID))
293 fid = GET_FIELD(fid, PXP_CONCRETE_FID_PFID);
294
295 p_ptt->pxp.pretend.control = cpu_to_le16(control);
296 p_ptt->pxp.pretend.fid.concrete_fid.fid = cpu_to_le16(fid);
297
298 REG_WR(p_hwfn,
299 qed_ptt_config_addr(p_ptt) +
300 offsetof(struct pxp_ptt_entry, pretend),
301 *(u32 *)&p_ptt->pxp.pretend);
302 }
303
304 void qed_port_pretend(struct qed_hwfn *p_hwfn,
305 struct qed_ptt *p_ptt, u8 port_id)
306 {
307 u16 control = 0;
308
309 SET_FIELD(control, PXP_PRETEND_CMD_PORT, port_id);
310 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 1);
311 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
312
313 p_ptt->pxp.pretend.control = cpu_to_le16(control);
314
315 REG_WR(p_hwfn,
316 qed_ptt_config_addr(p_ptt) +
317 offsetof(struct pxp_ptt_entry, pretend),
318 *(u32 *)&p_ptt->pxp.pretend);
319 }
320
321 void qed_port_unpretend(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
322 {
323 u16 control = 0;
324
325 SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
326 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
327 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
328
329 p_ptt->pxp.pretend.control = cpu_to_le16(control);
330
331 REG_WR(p_hwfn,
332 qed_ptt_config_addr(p_ptt) +
333 offsetof(struct pxp_ptt_entry, pretend),
334 *(u32 *)&p_ptt->pxp.pretend);
335 }
336
337 void qed_port_fid_pretend(struct qed_hwfn *p_hwfn,
338 struct qed_ptt *p_ptt, u8 port_id, u16 fid)
339 {
340 u16 control = 0;
341
342 SET_FIELD(control, PXP_PRETEND_CMD_PORT, port_id);
343 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 1);
344 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
345 SET_FIELD(control, PXP_PRETEND_CMD_IS_CONCRETE, 1);
346 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_FUNCTION, 1);
347 if (!GET_FIELD(fid, PXP_CONCRETE_FID_VFVALID))
348 fid = GET_FIELD(fid, PXP_CONCRETE_FID_PFID);
349 p_ptt->pxp.pretend.control = cpu_to_le16(control);
350 p_ptt->pxp.pretend.fid.concrete_fid.fid = cpu_to_le16(fid);
351 REG_WR(p_hwfn,
352 qed_ptt_config_addr(p_ptt) +
353 offsetof(struct pxp_ptt_entry, pretend),
354 *(u32 *)&p_ptt->pxp.pretend);
355 }
356
357 u32 qed_vfid_to_concrete(struct qed_hwfn *p_hwfn, u8 vfid)
358 {
359 u32 concrete_fid = 0;
360
361 SET_FIELD(concrete_fid, PXP_CONCRETE_FID_PFID, p_hwfn->rel_pf_id);
362 SET_FIELD(concrete_fid, PXP_CONCRETE_FID_VFID, vfid);
363 SET_FIELD(concrete_fid, PXP_CONCRETE_FID_VFVALID, 1);
364
365 return concrete_fid;
366 }
367
368 /* DMAE */
369 #define QED_DMAE_FLAGS_IS_SET(params, flag) \
370 ((params) != NULL && GET_FIELD((params)->flags, QED_DMAE_PARAMS_##flag))
371
372 static void qed_dmae_opcode(struct qed_hwfn *p_hwfn,
373 const u8 is_src_type_grc,
374 const u8 is_dst_type_grc,
375 struct qed_dmae_params *p_params)
376 {
377 u8 src_pfid, dst_pfid, port_id;
378 u16 opcode_b = 0;
379 u32 opcode = 0;
380
381 /* Whether the source is the PCIe or the GRC.
382 * 0- The source is the PCIe
383 * 1- The source is the GRC.
384 */
385 SET_FIELD(opcode, DMAE_CMD_SRC,
386 (is_src_type_grc ? dmae_cmd_src_grc : dmae_cmd_src_pcie));
387 src_pfid = QED_DMAE_FLAGS_IS_SET(p_params, SRC_PF_VALID) ?
388 p_params->src_pfid : p_hwfn->rel_pf_id;
389 SET_FIELD(opcode, DMAE_CMD_SRC_PF_ID, src_pfid);
390
391 /* The destination of the DMA can be: 0-None 1-PCIe 2-GRC 3-None */
392 SET_FIELD(opcode, DMAE_CMD_DST,
393 (is_dst_type_grc ? dmae_cmd_dst_grc : dmae_cmd_dst_pcie));
394 dst_pfid = QED_DMAE_FLAGS_IS_SET(p_params, DST_PF_VALID) ?
395 p_params->dst_pfid : p_hwfn->rel_pf_id;
396 SET_FIELD(opcode, DMAE_CMD_DST_PF_ID, dst_pfid);
397
398
399 /* Whether to write a completion word to the completion destination:
400 * 0-Do not write a completion word
401 * 1-Write the completion word
402 */
403 SET_FIELD(opcode, DMAE_CMD_COMP_WORD_EN, 1);
404 SET_FIELD(opcode, DMAE_CMD_SRC_ADDR_RESET, 1);
405
406 if (QED_DMAE_FLAGS_IS_SET(p_params, COMPLETION_DST))
407 SET_FIELD(opcode, DMAE_CMD_COMP_FUNC, 1);
408
409 /* swapping mode 3 - big endian */
410 SET_FIELD(opcode, DMAE_CMD_ENDIANITY_MODE, DMAE_CMD_ENDIANITY);
411
412 port_id = (QED_DMAE_FLAGS_IS_SET(p_params, PORT_VALID)) ?
413 p_params->port_id : p_hwfn->port_id;
414 SET_FIELD(opcode, DMAE_CMD_PORT_ID, port_id);
415
416 /* reset source address in next go */
417 SET_FIELD(opcode, DMAE_CMD_SRC_ADDR_RESET, 1);
418
419 /* reset dest address in next go */
420 SET_FIELD(opcode, DMAE_CMD_DST_ADDR_RESET, 1);
421
422 /* SRC/DST VFID: all 1's - pf, otherwise VF id */
423 if (QED_DMAE_FLAGS_IS_SET(p_params, SRC_VF_VALID)) {
424 SET_FIELD(opcode, DMAE_CMD_SRC_VF_ID_VALID, 1);
425 SET_FIELD(opcode_b, DMAE_CMD_SRC_VF_ID, p_params->src_vfid);
426 } else {
427 SET_FIELD(opcode_b, DMAE_CMD_SRC_VF_ID, 0xFF);
428 }
429 if (QED_DMAE_FLAGS_IS_SET(p_params, DST_VF_VALID)) {
430 SET_FIELD(opcode, DMAE_CMD_DST_VF_ID_VALID, 1);
431 SET_FIELD(opcode_b, DMAE_CMD_DST_VF_ID, p_params->dst_vfid);
432 } else {
433 SET_FIELD(opcode_b, DMAE_CMD_DST_VF_ID, 0xFF);
434 }
435
436 p_hwfn->dmae_info.p_dmae_cmd->opcode = cpu_to_le32(opcode);
437 p_hwfn->dmae_info.p_dmae_cmd->opcode_b = cpu_to_le16(opcode_b);
438 }
439
440 u32 qed_dmae_idx_to_go_cmd(u8 idx)
441 {
442 /* All the DMAE 'go' registers form an array in internal memory */
443 return DMAE_REG_GO_C0 + (idx << 2);
444 }
445
446 static int qed_dmae_post_command(struct qed_hwfn *p_hwfn,
447 struct qed_ptt *p_ptt)
448 {
449 struct dmae_cmd *p_command = p_hwfn->dmae_info.p_dmae_cmd;
450 u8 idx_cmd = p_hwfn->dmae_info.channel, i;
451 int qed_status = 0;
452
453 /* verify address is not NULL */
454 if ((((!p_command->dst_addr_lo) && (!p_command->dst_addr_hi)) ||
455 ((!p_command->src_addr_lo) && (!p_command->src_addr_hi)))) {
456 DP_NOTICE(p_hwfn,
457 "source or destination address 0 idx_cmd=%d\n"
458 "opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
459 idx_cmd,
460 le32_to_cpu(p_command->opcode),
461 le16_to_cpu(p_command->opcode_b),
462 le16_to_cpu(p_command->length_dw),
463 le32_to_cpu(p_command->src_addr_hi),
464 le32_to_cpu(p_command->src_addr_lo),
465 le32_to_cpu(p_command->dst_addr_hi),
466 le32_to_cpu(p_command->dst_addr_lo));
467
468 return -EINVAL;
469 }
470
471 DP_VERBOSE(p_hwfn,
472 NETIF_MSG_HW,
473 "Posting DMAE command [idx %d]: opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
474 idx_cmd,
475 le32_to_cpu(p_command->opcode),
476 le16_to_cpu(p_command->opcode_b),
477 le16_to_cpu(p_command->length_dw),
478 le32_to_cpu(p_command->src_addr_hi),
479 le32_to_cpu(p_command->src_addr_lo),
480 le32_to_cpu(p_command->dst_addr_hi),
481 le32_to_cpu(p_command->dst_addr_lo));
482
483 /* Copy the command to DMAE - need to do it before every call
484 * for source/dest address no reset.
485 * The first 9 DWs are the command registers, the 10 DW is the
486 * GO register, and the rest are result registers
487 * (which are read only by the client).
488 */
489 for (i = 0; i < DMAE_CMD_SIZE; i++) {
490 u32 data = (i < DMAE_CMD_SIZE_TO_FILL) ?
491 *(((u32 *)p_command) + i) : 0;
492
493 qed_wr(p_hwfn, p_ptt,
494 DMAE_REG_CMD_MEM +
495 (idx_cmd * DMAE_CMD_SIZE * sizeof(u32)) +
496 (i * sizeof(u32)), data);
497 }
498
499 qed_wr(p_hwfn, p_ptt, qed_dmae_idx_to_go_cmd(idx_cmd), DMAE_GO_VALUE);
500
501 return qed_status;
502 }
503
504 int qed_dmae_info_alloc(struct qed_hwfn *p_hwfn)
505 {
506 dma_addr_t *p_addr = &p_hwfn->dmae_info.completion_word_phys_addr;
507 struct dmae_cmd **p_cmd = &p_hwfn->dmae_info.p_dmae_cmd;
508 u32 **p_buff = &p_hwfn->dmae_info.p_intermediate_buffer;
509 u32 **p_comp = &p_hwfn->dmae_info.p_completion_word;
510
511 *p_comp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
512 sizeof(u32), p_addr, GFP_KERNEL);
513 if (!*p_comp)
514 goto err;
515
516 p_addr = &p_hwfn->dmae_info.dmae_cmd_phys_addr;
517 *p_cmd = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
518 sizeof(struct dmae_cmd),
519 p_addr, GFP_KERNEL);
520 if (!*p_cmd)
521 goto err;
522
523 p_addr = &p_hwfn->dmae_info.intermediate_buffer_phys_addr;
524 *p_buff = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
525 sizeof(u32) * DMAE_MAX_RW_SIZE,
526 p_addr, GFP_KERNEL);
527 if (!*p_buff)
528 goto err;
529
530 p_hwfn->dmae_info.channel = p_hwfn->rel_pf_id;
531
532 return 0;
533 err:
534 qed_dmae_info_free(p_hwfn);
535 return -ENOMEM;
536 }
537
538 void qed_dmae_info_free(struct qed_hwfn *p_hwfn)
539 {
540 dma_addr_t p_phys;
541
542 /* Just make sure no one is in the middle */
543 mutex_lock(&p_hwfn->dmae_info.mutex);
544
545 if (p_hwfn->dmae_info.p_completion_word) {
546 p_phys = p_hwfn->dmae_info.completion_word_phys_addr;
547 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
548 sizeof(u32),
549 p_hwfn->dmae_info.p_completion_word, p_phys);
550 p_hwfn->dmae_info.p_completion_word = NULL;
551 }
552
553 if (p_hwfn->dmae_info.p_dmae_cmd) {
554 p_phys = p_hwfn->dmae_info.dmae_cmd_phys_addr;
555 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
556 sizeof(struct dmae_cmd),
557 p_hwfn->dmae_info.p_dmae_cmd, p_phys);
558 p_hwfn->dmae_info.p_dmae_cmd = NULL;
559 }
560
561 if (p_hwfn->dmae_info.p_intermediate_buffer) {
562 p_phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
563 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
564 sizeof(u32) * DMAE_MAX_RW_SIZE,
565 p_hwfn->dmae_info.p_intermediate_buffer,
566 p_phys);
567 p_hwfn->dmae_info.p_intermediate_buffer = NULL;
568 }
569
570 mutex_unlock(&p_hwfn->dmae_info.mutex);
571 }
572
573 static int qed_dmae_operation_wait(struct qed_hwfn *p_hwfn)
574 {
575 u32 wait_cnt_limit = 10000, wait_cnt = 0;
576 int qed_status = 0;
577
578 barrier();
579 while (*p_hwfn->dmae_info.p_completion_word != DMAE_COMPLETION_VAL) {
580 udelay(DMAE_MIN_WAIT_TIME);
581 if (++wait_cnt > wait_cnt_limit) {
582 DP_NOTICE(p_hwfn->cdev,
583 "Timed-out waiting for operation to complete. Completion word is 0x%08x expected 0x%08x.\n",
584 *p_hwfn->dmae_info.p_completion_word,
585 DMAE_COMPLETION_VAL);
586 qed_status = -EBUSY;
587 break;
588 }
589
590 /* to sync the completion_word since we are not
591 * using the volatile keyword for p_completion_word
592 */
593 barrier();
594 }
595
596 if (qed_status == 0)
597 *p_hwfn->dmae_info.p_completion_word = 0;
598
599 return qed_status;
600 }
601
602 static int qed_dmae_execute_sub_operation(struct qed_hwfn *p_hwfn,
603 struct qed_ptt *p_ptt,
604 u64 src_addr,
605 u64 dst_addr,
606 u8 src_type,
607 u8 dst_type,
608 u32 length_dw)
609 {
610 dma_addr_t phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
611 struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
612 int qed_status = 0;
613
614 switch (src_type) {
615 case QED_DMAE_ADDRESS_GRC:
616 case QED_DMAE_ADDRESS_HOST_PHYS:
617 cmd->src_addr_hi = cpu_to_le32(upper_32_bits(src_addr));
618 cmd->src_addr_lo = cpu_to_le32(lower_32_bits(src_addr));
619 break;
620 /* for virtual source addresses we use the intermediate buffer. */
621 case QED_DMAE_ADDRESS_HOST_VIRT:
622 cmd->src_addr_hi = cpu_to_le32(upper_32_bits(phys));
623 cmd->src_addr_lo = cpu_to_le32(lower_32_bits(phys));
624 memcpy(&p_hwfn->dmae_info.p_intermediate_buffer[0],
625 (void *)(uintptr_t)src_addr,
626 length_dw * sizeof(u32));
627 break;
628 default:
629 return -EINVAL;
630 }
631
632 switch (dst_type) {
633 case QED_DMAE_ADDRESS_GRC:
634 case QED_DMAE_ADDRESS_HOST_PHYS:
635 cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(dst_addr));
636 cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(dst_addr));
637 break;
638 /* for virtual source addresses we use the intermediate buffer. */
639 case QED_DMAE_ADDRESS_HOST_VIRT:
640 cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(phys));
641 cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(phys));
642 break;
643 default:
644 return -EINVAL;
645 }
646
647 cmd->length_dw = cpu_to_le16((u16)length_dw);
648
649 qed_dmae_post_command(p_hwfn, p_ptt);
650
651 qed_status = qed_dmae_operation_wait(p_hwfn);
652
653 if (qed_status) {
654 DP_NOTICE(p_hwfn,
655 "qed_dmae_host2grc: Wait Failed. source_addr 0x%llx, grc_addr 0x%llx, size_in_dwords 0x%x\n",
656 src_addr, dst_addr, length_dw);
657 return qed_status;
658 }
659
660 if (dst_type == QED_DMAE_ADDRESS_HOST_VIRT)
661 memcpy((void *)(uintptr_t)(dst_addr),
662 &p_hwfn->dmae_info.p_intermediate_buffer[0],
663 length_dw * sizeof(u32));
664
665 return 0;
666 }
667
668 static int qed_dmae_execute_command(struct qed_hwfn *p_hwfn,
669 struct qed_ptt *p_ptt,
670 u64 src_addr, u64 dst_addr,
671 u8 src_type, u8 dst_type,
672 u32 size_in_dwords,
673 struct qed_dmae_params *p_params)
674 {
675 dma_addr_t phys = p_hwfn->dmae_info.completion_word_phys_addr;
676 u16 length_cur = 0, i = 0, cnt_split = 0, length_mod = 0;
677 struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
678 u64 src_addr_split = 0, dst_addr_split = 0;
679 u16 length_limit = DMAE_MAX_RW_SIZE;
680 int qed_status = 0;
681 u32 offset = 0;
682
683 if (p_hwfn->cdev->recov_in_prog) {
684 DP_VERBOSE(p_hwfn,
685 NETIF_MSG_HW,
686 "Recovery is in progress. Avoid DMAE transaction [{src: addr 0x%llx, type %d}, {dst: addr 0x%llx, type %d}, size %d].\n",
687 src_addr, src_type, dst_addr, dst_type,
688 size_in_dwords);
689
690 /* Let the flow complete w/o any error handling */
691 return 0;
692 }
693
694 qed_dmae_opcode(p_hwfn,
695 (src_type == QED_DMAE_ADDRESS_GRC),
696 (dst_type == QED_DMAE_ADDRESS_GRC),
697 p_params);
698
699 cmd->comp_addr_lo = cpu_to_le32(lower_32_bits(phys));
700 cmd->comp_addr_hi = cpu_to_le32(upper_32_bits(phys));
701 cmd->comp_val = cpu_to_le32(DMAE_COMPLETION_VAL);
702
703 /* Check if the grc_addr is valid like < MAX_GRC_OFFSET */
704 cnt_split = size_in_dwords / length_limit;
705 length_mod = size_in_dwords % length_limit;
706
707 src_addr_split = src_addr;
708 dst_addr_split = dst_addr;
709
710 for (i = 0; i <= cnt_split; i++) {
711 offset = length_limit * i;
712
713 if (!QED_DMAE_FLAGS_IS_SET(p_params, RW_REPL_SRC)) {
714 if (src_type == QED_DMAE_ADDRESS_GRC)
715 src_addr_split = src_addr + offset;
716 else
717 src_addr_split = src_addr + (offset * 4);
718 }
719
720 if (dst_type == QED_DMAE_ADDRESS_GRC)
721 dst_addr_split = dst_addr + offset;
722 else
723 dst_addr_split = dst_addr + (offset * 4);
724
725 length_cur = (cnt_split == i) ? length_mod : length_limit;
726
727 /* might be zero on last iteration */
728 if (!length_cur)
729 continue;
730
731 qed_status = qed_dmae_execute_sub_operation(p_hwfn,
732 p_ptt,
733 src_addr_split,
734 dst_addr_split,
735 src_type,
736 dst_type,
737 length_cur);
738 if (qed_status) {
739 qed_hw_err_notify(p_hwfn, p_ptt, QED_HW_ERR_DMAE_FAIL,
740 "qed_dmae_execute_sub_operation Failed with error 0x%x. source_addr 0x%llx, destination addr 0x%llx, size_in_dwords 0x%x\n",
741 qed_status, src_addr,
742 dst_addr, length_cur);
743 break;
744 }
745 }
746
747 return qed_status;
748 }
749
750 int qed_dmae_host2grc(struct qed_hwfn *p_hwfn,
751 struct qed_ptt *p_ptt,
752 u64 source_addr, u32 grc_addr, u32 size_in_dwords,
753 struct qed_dmae_params *p_params)
754 {
755 u32 grc_addr_in_dw = grc_addr / sizeof(u32);
756 int rc;
757
758
759 mutex_lock(&p_hwfn->dmae_info.mutex);
760
761 rc = qed_dmae_execute_command(p_hwfn, p_ptt, source_addr,
762 grc_addr_in_dw,
763 QED_DMAE_ADDRESS_HOST_VIRT,
764 QED_DMAE_ADDRESS_GRC,
765 size_in_dwords, p_params);
766
767 mutex_unlock(&p_hwfn->dmae_info.mutex);
768
769 return rc;
770 }
771
772 int qed_dmae_grc2host(struct qed_hwfn *p_hwfn,
773 struct qed_ptt *p_ptt,
774 u32 grc_addr,
775 dma_addr_t dest_addr, u32 size_in_dwords,
776 struct qed_dmae_params *p_params)
777 {
778 u32 grc_addr_in_dw = grc_addr / sizeof(u32);
779 int rc;
780
781
782 mutex_lock(&p_hwfn->dmae_info.mutex);
783
784 rc = qed_dmae_execute_command(p_hwfn, p_ptt, grc_addr_in_dw,
785 dest_addr, QED_DMAE_ADDRESS_GRC,
786 QED_DMAE_ADDRESS_HOST_VIRT,
787 size_in_dwords, p_params);
788
789 mutex_unlock(&p_hwfn->dmae_info.mutex);
790
791 return rc;
792 }
793
794 int qed_dmae_host2host(struct qed_hwfn *p_hwfn,
795 struct qed_ptt *p_ptt,
796 dma_addr_t source_addr,
797 dma_addr_t dest_addr,
798 u32 size_in_dwords, struct qed_dmae_params *p_params)
799 {
800 int rc;
801
802 mutex_lock(&(p_hwfn->dmae_info.mutex));
803
804 rc = qed_dmae_execute_command(p_hwfn, p_ptt, source_addr,
805 dest_addr,
806 QED_DMAE_ADDRESS_HOST_PHYS,
807 QED_DMAE_ADDRESS_HOST_PHYS,
808 size_in_dwords, p_params);
809
810 mutex_unlock(&(p_hwfn->dmae_info.mutex));
811
812 return rc;
813 }
814
815 void qed_hw_err_notify(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
816 enum qed_hw_err_type err_type, const char *fmt, ...)
817 {
818 char buf[QED_HW_ERR_MAX_STR_SIZE];
819 va_list vl;
820 int len;
821
822 if (fmt) {
823 va_start(vl, fmt);
824 len = vsnprintf(buf, QED_HW_ERR_MAX_STR_SIZE, fmt, vl);
825 va_end(vl);
826
827 if (len > QED_HW_ERR_MAX_STR_SIZE - 1)
828 len = QED_HW_ERR_MAX_STR_SIZE - 1;
829
830 DP_NOTICE(p_hwfn, "%s", buf);
831 }
832
833 /* Fan failure cannot be masked by handling of another HW error */
834 if (p_hwfn->cdev->recov_in_prog &&
835 err_type != QED_HW_ERR_FAN_FAIL) {
836 DP_VERBOSE(p_hwfn,
837 NETIF_MSG_DRV,
838 "Recovery is in progress. Avoid notifying about HW error %d.\n",
839 err_type);
840 return;
841 }
842
843 qed_hw_error_occurred(p_hwfn, err_type);
844
845 if (fmt)
846 qed_mcp_send_raw_debug_data(p_hwfn, p_ptt, buf, len);
847 }
848
849 int qed_dmae_sanity(struct qed_hwfn *p_hwfn,
850 struct qed_ptt *p_ptt, const char *phase)
851 {
852 u32 size = PAGE_SIZE / 2, val;
853 int rc = 0;
854 dma_addr_t p_phys;
855 void *p_virt;
856 u32 *p_tmp;
857
858 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
859 2 * size, &p_phys, GFP_KERNEL);
860 if (!p_virt) {
861 DP_NOTICE(p_hwfn,
862 "DMAE sanity [%s]: failed to allocate memory\n",
863 phase);
864 return -ENOMEM;
865 }
866
867 /* Fill the bottom half of the allocated memory with a known pattern */
868 for (p_tmp = (u32 *)p_virt;
869 p_tmp < (u32 *)((u8 *)p_virt + size); p_tmp++) {
870 /* Save the address itself as the value */
871 val = (u32)(uintptr_t)p_tmp;
872 *p_tmp = val;
873 }
874
875 /* Zero the top half of the allocated memory */
876 memset((u8 *)p_virt + size, 0, size);
877
878 DP_VERBOSE(p_hwfn,
879 QED_MSG_SP,
880 "DMAE sanity [%s]: src_addr={phys 0x%llx, virt %p}, dst_addr={phys 0x%llx, virt %p}, size 0x%x\n",
881 phase,
882 (u64)p_phys,
883 p_virt, (u64)(p_phys + size), (u8 *)p_virt + size, size);
884
885 rc = qed_dmae_host2host(p_hwfn, p_ptt, p_phys, p_phys + size,
886 size / 4, NULL);
887 if (rc) {
888 DP_NOTICE(p_hwfn,
889 "DMAE sanity [%s]: qed_dmae_host2host() failed. rc = %d.\n",
890 phase, rc);
891 goto out;
892 }
893
894 /* Verify that the top half of the allocated memory has the pattern */
895 for (p_tmp = (u32 *)((u8 *)p_virt + size);
896 p_tmp < (u32 *)((u8 *)p_virt + (2 * size)); p_tmp++) {
897 /* The corresponding address in the bottom half */
898 val = (u32)(uintptr_t)p_tmp - size;
899
900 if (*p_tmp != val) {
901 DP_NOTICE(p_hwfn,
902 "DMAE sanity [%s]: addr={phys 0x%llx, virt %p}, read_val 0x%08x, expected_val 0x%08x\n",
903 phase,
904 (u64)p_phys + ((u8 *)p_tmp - (u8 *)p_virt),
905 p_tmp, *p_tmp, val);
906 rc = -EINVAL;
907 goto out;
908 }
909 }
910
911 out:
912 dma_free_coherent(&p_hwfn->cdev->pdev->dev, 2 * size, p_virt, p_phys);
913 return rc;
914 }
Linux with added FPC-III support