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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / net / ethernet / qlogic / qed / qed_hw.c
blob9e5f0dbc8a07654fe1449c08e7eecade298770d9
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_USLEEP_CNT 1000
27 #define QED_BAR_ACQUIRE_TIMEOUT_USLEEP 1000
28 #define QED_BAR_ACQUIRE_TIMEOUT_UDELAY_CNT 100000
29 #define QED_BAR_ACQUIRE_TIMEOUT_UDELAY 10
30
31 /* Invalid values */
32 #define QED_BAR_INVALID_OFFSET (cpu_to_le32(-1))
33
34 struct qed_ptt {
35 struct list_head list_entry;
36 unsigned int idx;
37 struct pxp_ptt_entry pxp;
38 u8 hwfn_id;
39 };
40
41 struct qed_ptt_pool {
42 struct list_head free_list;
43 spinlock_t lock; /* ptt synchronized access */
44 struct qed_ptt ptts[PXP_EXTERNAL_BAR_PF_WINDOW_NUM];
45 };
46
47 int qed_ptt_pool_alloc(struct qed_hwfn *p_hwfn)
48 {
49 struct qed_ptt_pool *p_pool = kmalloc(sizeof(*p_pool), GFP_KERNEL);
50 int i;
51
52 if (!p_pool)
53 return -ENOMEM;
54
55 INIT_LIST_HEAD(&p_pool->free_list);
56 for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
57 p_pool->ptts[i].idx = i;
58 p_pool->ptts[i].pxp.offset = QED_BAR_INVALID_OFFSET;
59 p_pool->ptts[i].pxp.pretend.control = 0;
60 p_pool->ptts[i].hwfn_id = p_hwfn->my_id;
61 if (i >= RESERVED_PTT_MAX)
62 list_add(&p_pool->ptts[i].list_entry,
63 &p_pool->free_list);
64 }
65
66 p_hwfn->p_ptt_pool = p_pool;
67 spin_lock_init(&p_pool->lock);
68
69 return 0;
70 }
71
72 void qed_ptt_invalidate(struct qed_hwfn *p_hwfn)
73 {
74 struct qed_ptt *p_ptt;
75 int i;
76
77 for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
78 p_ptt = &p_hwfn->p_ptt_pool->ptts[i];
79 p_ptt->pxp.offset = QED_BAR_INVALID_OFFSET;
80 }
81 }
82
83 void qed_ptt_pool_free(struct qed_hwfn *p_hwfn)
84 {
85 kfree(p_hwfn->p_ptt_pool);
86 p_hwfn->p_ptt_pool = NULL;
87 }
88
89 struct qed_ptt *qed_ptt_acquire(struct qed_hwfn *p_hwfn)
90 {
91 return qed_ptt_acquire_context(p_hwfn, false);
92 }
93
94 struct qed_ptt *qed_ptt_acquire_context(struct qed_hwfn *p_hwfn, bool is_atomic)
95 {
96 struct qed_ptt *p_ptt;
97 unsigned int i, count;
98
99 if (is_atomic)
100 count = QED_BAR_ACQUIRE_TIMEOUT_UDELAY_CNT;
101 else
102 count = QED_BAR_ACQUIRE_TIMEOUT_USLEEP_CNT;
103
104 /* Take the free PTT from the list */
105 for (i = 0; i < count; i++) {
106 spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
107
108 if (!list_empty(&p_hwfn->p_ptt_pool->free_list)) {
109 p_ptt = list_first_entry(&p_hwfn->p_ptt_pool->free_list,
110 struct qed_ptt, list_entry);
111 list_del(&p_ptt->list_entry);
112
113 spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
114
115 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
116 "allocated ptt %d\n", p_ptt->idx);
117 return p_ptt;
118 }
119
120 spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
121
122 if (is_atomic)
123 udelay(QED_BAR_ACQUIRE_TIMEOUT_UDELAY);
124 else
125 usleep_range(QED_BAR_ACQUIRE_TIMEOUT_USLEEP,
126 QED_BAR_ACQUIRE_TIMEOUT_USLEEP * 2);
127 }
128
129 DP_NOTICE(p_hwfn, "PTT acquire timeout - failed to allocate PTT\n");
130 return NULL;
131 }
132
133 void qed_ptt_release(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
134 {
135 spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
136 list_add(&p_ptt->list_entry, &p_hwfn->p_ptt_pool->free_list);
137 spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
138 }
139
140 u32 qed_ptt_get_hw_addr(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
141 {
142 /* The HW is using DWORDS and we need to translate it to Bytes */
143 return le32_to_cpu(p_ptt->pxp.offset) << 2;
144 }
145
146 static u32 qed_ptt_config_addr(struct qed_ptt *p_ptt)
147 {
148 return PXP_PF_WINDOW_ADMIN_PER_PF_START +
149 p_ptt->idx * sizeof(struct pxp_ptt_entry);
150 }
151
152 u32 qed_ptt_get_bar_addr(struct qed_ptt *p_ptt)
153 {
154 return PXP_EXTERNAL_BAR_PF_WINDOW_START +
155 p_ptt->idx * PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE;
156 }
157
158 void qed_ptt_set_win(struct qed_hwfn *p_hwfn,
159 struct qed_ptt *p_ptt, u32 new_hw_addr)
160 {
161 u32 prev_hw_addr;
162
163 prev_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
164
165 if (new_hw_addr == prev_hw_addr)
166 return;
167
168 /* Update PTT entery in admin window */
169 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
170 "Updating PTT entry %d to offset 0x%x\n",
171 p_ptt->idx, new_hw_addr);
172
173 /* The HW is using DWORDS and the address is in Bytes */
174 p_ptt->pxp.offset = cpu_to_le32(new_hw_addr >> 2);
175
176 REG_WR(p_hwfn,
177 qed_ptt_config_addr(p_ptt) +
178 offsetof(struct pxp_ptt_entry, offset),
179 le32_to_cpu(p_ptt->pxp.offset));
180 }
181
182 static u32 qed_set_ptt(struct qed_hwfn *p_hwfn,
183 struct qed_ptt *p_ptt, u32 hw_addr)
184 {
185 u32 win_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
186 u32 offset;
187
188 offset = hw_addr - win_hw_addr;
189
190 if (p_ptt->hwfn_id != p_hwfn->my_id)
191 DP_NOTICE(p_hwfn,
192 "ptt[%d] of hwfn[%02x] is used by hwfn[%02x]!\n",
193 p_ptt->idx, p_ptt->hwfn_id, p_hwfn->my_id);
194
195 /* Verify the address is within the window */
196 if (hw_addr < win_hw_addr ||
197 offset >= PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE) {
198 qed_ptt_set_win(p_hwfn, p_ptt, hw_addr);
199 offset = 0;
200 }
201
202 return qed_ptt_get_bar_addr(p_ptt) + offset;
203 }
204
205 struct qed_ptt *qed_get_reserved_ptt(struct qed_hwfn *p_hwfn,
206 enum reserved_ptts ptt_idx)
207 {
208 if (ptt_idx >= RESERVED_PTT_MAX) {
209 DP_NOTICE(p_hwfn,
210 "Requested PTT %d is out of range\n", ptt_idx);
211 return NULL;
212 }
213
214 return &p_hwfn->p_ptt_pool->ptts[ptt_idx];
215 }
216
217 void qed_wr(struct qed_hwfn *p_hwfn,
218 struct qed_ptt *p_ptt,
219 u32 hw_addr, u32 val)
220 {
221 u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
222
223 REG_WR(p_hwfn, bar_addr, val);
224 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
225 "bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
226 bar_addr, hw_addr, val);
227 }
228
229 u32 qed_rd(struct qed_hwfn *p_hwfn,
230 struct qed_ptt *p_ptt,
231 u32 hw_addr)
232 {
233 u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
234 u32 val = REG_RD(p_hwfn, bar_addr);
235
236 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
237 "bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
238 bar_addr, hw_addr, val);
239
240 return val;
241 }
242
243 static void qed_memcpy_hw(struct qed_hwfn *p_hwfn,
244 struct qed_ptt *p_ptt,
245 void *addr, u32 hw_addr, size_t n, bool to_device)
246 {
247 u32 dw_count, *host_addr, hw_offset;
248 size_t quota, done = 0;
249 u32 __iomem *reg_addr;
250
251 while (done < n) {
252 quota = min_t(size_t, n - done,
253 PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE);
254
255 if (IS_PF(p_hwfn->cdev)) {
256 qed_ptt_set_win(p_hwfn, p_ptt, hw_addr + done);
257 hw_offset = qed_ptt_get_bar_addr(p_ptt);
258 } else {
259 hw_offset = hw_addr + done;
260 }
261
262 dw_count = quota / 4;
263 host_addr = (u32 *)((u8 *)addr + done);
264 reg_addr = (u32 __iomem *)REG_ADDR(p_hwfn, hw_offset);
265 if (to_device)
266 while (dw_count--)
267 DIRECT_REG_WR(reg_addr++, *host_addr++);
268 else
269 while (dw_count--)
270 *host_addr++ = DIRECT_REG_RD(reg_addr++);
271
272 done += quota;
273 }
274 }
275
276 void qed_memcpy_from(struct qed_hwfn *p_hwfn,
277 struct qed_ptt *p_ptt, void *dest, u32 hw_addr, size_t n)
278 {
279 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
280 "hw_addr 0x%x, dest %p hw_addr 0x%x, size %lu\n",
281 hw_addr, dest, hw_addr, (unsigned long)n);
282
283 qed_memcpy_hw(p_hwfn, p_ptt, dest, hw_addr, n, false);
284 }
285
286 void qed_memcpy_to(struct qed_hwfn *p_hwfn,
287 struct qed_ptt *p_ptt, u32 hw_addr, void *src, size_t n)
288 {
289 DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
290 "hw_addr 0x%x, hw_addr 0x%x, src %p size %lu\n",
291 hw_addr, hw_addr, src, (unsigned long)n);
292
293 qed_memcpy_hw(p_hwfn, p_ptt, src, hw_addr, n, true);
294 }
295
296 void qed_fid_pretend(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, u16 fid)
297 {
298 u16 control = 0;
299
300 SET_FIELD(control, PXP_PRETEND_CMD_IS_CONCRETE, 1);
301 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_FUNCTION, 1);
302
303 /* Every pretend undos previous pretends, including
304 * previous port pretend.
305 */
306 SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
307 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
308 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
309
310 if (!GET_FIELD(fid, PXP_CONCRETE_FID_VFVALID))
311 fid = GET_FIELD(fid, PXP_CONCRETE_FID_PFID);
312
313 p_ptt->pxp.pretend.control = cpu_to_le16(control);
314 p_ptt->pxp.pretend.fid.concrete_fid.fid = cpu_to_le16(fid);
315
316 REG_WR(p_hwfn,
317 qed_ptt_config_addr(p_ptt) +
318 offsetof(struct pxp_ptt_entry, pretend),
319 *(u32 *)&p_ptt->pxp.pretend);
320 }
321
322 void qed_port_pretend(struct qed_hwfn *p_hwfn,
323 struct qed_ptt *p_ptt, u8 port_id)
324 {
325 u16 control = 0;
326
327 SET_FIELD(control, PXP_PRETEND_CMD_PORT, port_id);
328 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 1);
329 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
330
331 p_ptt->pxp.pretend.control = cpu_to_le16(control);
332
333 REG_WR(p_hwfn,
334 qed_ptt_config_addr(p_ptt) +
335 offsetof(struct pxp_ptt_entry, pretend),
336 *(u32 *)&p_ptt->pxp.pretend);
337 }
338
339 void qed_port_unpretend(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
340 {
341 u16 control = 0;
342
343 SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
344 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
345 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
346
347 p_ptt->pxp.pretend.control = cpu_to_le16(control);
348
349 REG_WR(p_hwfn,
350 qed_ptt_config_addr(p_ptt) +
351 offsetof(struct pxp_ptt_entry, pretend),
352 *(u32 *)&p_ptt->pxp.pretend);
353 }
354
355 void qed_port_fid_pretend(struct qed_hwfn *p_hwfn,
356 struct qed_ptt *p_ptt, u8 port_id, u16 fid)
357 {
358 u16 control = 0;
359
360 SET_FIELD(control, PXP_PRETEND_CMD_PORT, port_id);
361 SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 1);
362 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
363 SET_FIELD(control, PXP_PRETEND_CMD_IS_CONCRETE, 1);
364 SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_FUNCTION, 1);
365 if (!GET_FIELD(fid, PXP_CONCRETE_FID_VFVALID))
366 fid = GET_FIELD(fid, PXP_CONCRETE_FID_PFID);
367 p_ptt->pxp.pretend.control = cpu_to_le16(control);
368 p_ptt->pxp.pretend.fid.concrete_fid.fid = cpu_to_le16(fid);
369 REG_WR(p_hwfn,
370 qed_ptt_config_addr(p_ptt) +
371 offsetof(struct pxp_ptt_entry, pretend),
372 *(u32 *)&p_ptt->pxp.pretend);
373 }
374
375 u32 qed_vfid_to_concrete(struct qed_hwfn *p_hwfn, u8 vfid)
376 {
377 u32 concrete_fid = 0;
378
379 SET_FIELD(concrete_fid, PXP_CONCRETE_FID_PFID, p_hwfn->rel_pf_id);
380 SET_FIELD(concrete_fid, PXP_CONCRETE_FID_VFID, vfid);
381 SET_FIELD(concrete_fid, PXP_CONCRETE_FID_VFVALID, 1);
382
383 return concrete_fid;
384 }
385
386 /* DMAE */
387 #define QED_DMAE_FLAGS_IS_SET(params, flag) \
388 ((params) != NULL && GET_FIELD((params)->flags, QED_DMAE_PARAMS_##flag))
389
390 static void qed_dmae_opcode(struct qed_hwfn *p_hwfn,
391 const u8 is_src_type_grc,
392 const u8 is_dst_type_grc,
393 struct qed_dmae_params *p_params)
394 {
395 u8 src_pfid, dst_pfid, port_id;
396 u16 opcode_b = 0;
397 u32 opcode = 0;
398
399 /* Whether the source is the PCIe or the GRC.
400 * 0- The source is the PCIe
401 * 1- The source is the GRC.
402 */
403 SET_FIELD(opcode, DMAE_CMD_SRC,
404 (is_src_type_grc ? dmae_cmd_src_grc : dmae_cmd_src_pcie));
405 src_pfid = QED_DMAE_FLAGS_IS_SET(p_params, SRC_PF_VALID) ?
406 p_params->src_pfid : p_hwfn->rel_pf_id;
407 SET_FIELD(opcode, DMAE_CMD_SRC_PF_ID, src_pfid);
408
409 /* The destination of the DMA can be: 0-None 1-PCIe 2-GRC 3-None */
410 SET_FIELD(opcode, DMAE_CMD_DST,
411 (is_dst_type_grc ? dmae_cmd_dst_grc : dmae_cmd_dst_pcie));
412 dst_pfid = QED_DMAE_FLAGS_IS_SET(p_params, DST_PF_VALID) ?
413 p_params->dst_pfid : p_hwfn->rel_pf_id;
414 SET_FIELD(opcode, DMAE_CMD_DST_PF_ID, dst_pfid);
415
416
417 /* Whether to write a completion word to the completion destination:
418 * 0-Do not write a completion word
419 * 1-Write the completion word
420 */
421 SET_FIELD(opcode, DMAE_CMD_COMP_WORD_EN, 1);
422 SET_FIELD(opcode, DMAE_CMD_SRC_ADDR_RESET, 1);
423
424 if (QED_DMAE_FLAGS_IS_SET(p_params, COMPLETION_DST))
425 SET_FIELD(opcode, DMAE_CMD_COMP_FUNC, 1);
426
427 /* swapping mode 3 - big endian */
428 SET_FIELD(opcode, DMAE_CMD_ENDIANITY_MODE, DMAE_CMD_ENDIANITY);
429
430 port_id = (QED_DMAE_FLAGS_IS_SET(p_params, PORT_VALID)) ?
431 p_params->port_id : p_hwfn->port_id;
432 SET_FIELD(opcode, DMAE_CMD_PORT_ID, port_id);
433
434 /* reset source address in next go */
435 SET_FIELD(opcode, DMAE_CMD_SRC_ADDR_RESET, 1);
436
437 /* reset dest address in next go */
438 SET_FIELD(opcode, DMAE_CMD_DST_ADDR_RESET, 1);
439
440 /* SRC/DST VFID: all 1's - pf, otherwise VF id */
441 if (QED_DMAE_FLAGS_IS_SET(p_params, SRC_VF_VALID)) {
442 SET_FIELD(opcode, DMAE_CMD_SRC_VF_ID_VALID, 1);
443 SET_FIELD(opcode_b, DMAE_CMD_SRC_VF_ID, p_params->src_vfid);
444 } else {
445 SET_FIELD(opcode_b, DMAE_CMD_SRC_VF_ID, 0xFF);
446 }
447 if (QED_DMAE_FLAGS_IS_SET(p_params, DST_VF_VALID)) {
448 SET_FIELD(opcode, DMAE_CMD_DST_VF_ID_VALID, 1);
449 SET_FIELD(opcode_b, DMAE_CMD_DST_VF_ID, p_params->dst_vfid);
450 } else {
451 SET_FIELD(opcode_b, DMAE_CMD_DST_VF_ID, 0xFF);
452 }
453
454 p_hwfn->dmae_info.p_dmae_cmd->opcode = cpu_to_le32(opcode);
455 p_hwfn->dmae_info.p_dmae_cmd->opcode_b = cpu_to_le16(opcode_b);
456 }
457
458 u32 qed_dmae_idx_to_go_cmd(u8 idx)
459 {
460 /* All the DMAE 'go' registers form an array in internal memory */
461 return DMAE_REG_GO_C0 + (idx << 2);
462 }
463
464 static int qed_dmae_post_command(struct qed_hwfn *p_hwfn,
465 struct qed_ptt *p_ptt)
466 {
467 struct dmae_cmd *p_command = p_hwfn->dmae_info.p_dmae_cmd;
468 u8 idx_cmd = p_hwfn->dmae_info.channel, i;
469 int qed_status = 0;
470
471 /* verify address is not NULL */
472 if ((((!p_command->dst_addr_lo) && (!p_command->dst_addr_hi)) ||
473 ((!p_command->src_addr_lo) && (!p_command->src_addr_hi)))) {
474 DP_NOTICE(p_hwfn,
475 "source or destination address 0 idx_cmd=%d\n"
476 "opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
477 idx_cmd,
478 le32_to_cpu(p_command->opcode),
479 le16_to_cpu(p_command->opcode_b),
480 le16_to_cpu(p_command->length_dw),
481 le32_to_cpu(p_command->src_addr_hi),
482 le32_to_cpu(p_command->src_addr_lo),
483 le32_to_cpu(p_command->dst_addr_hi),
484 le32_to_cpu(p_command->dst_addr_lo));
485
486 return -EINVAL;
487 }
488
489 DP_VERBOSE(p_hwfn,
490 NETIF_MSG_HW,
491 "Posting DMAE command [idx %d]: opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
492 idx_cmd,
493 le32_to_cpu(p_command->opcode),
494 le16_to_cpu(p_command->opcode_b),
495 le16_to_cpu(p_command->length_dw),
496 le32_to_cpu(p_command->src_addr_hi),
497 le32_to_cpu(p_command->src_addr_lo),
498 le32_to_cpu(p_command->dst_addr_hi),
499 le32_to_cpu(p_command->dst_addr_lo));
500
501 /* Copy the command to DMAE - need to do it before every call
502 * for source/dest address no reset.
503 * The first 9 DWs are the command registers, the 10 DW is the
504 * GO register, and the rest are result registers
505 * (which are read only by the client).
506 */
507 for (i = 0; i < DMAE_CMD_SIZE; i++) {
508 u32 data = (i < DMAE_CMD_SIZE_TO_FILL) ?
509 *(((u32 *)p_command) + i) : 0;
510
511 qed_wr(p_hwfn, p_ptt,
512 DMAE_REG_CMD_MEM +
513 (idx_cmd * DMAE_CMD_SIZE * sizeof(u32)) +
514 (i * sizeof(u32)), data);
515 }
516
517 qed_wr(p_hwfn, p_ptt, qed_dmae_idx_to_go_cmd(idx_cmd), DMAE_GO_VALUE);
518
519 return qed_status;
520 }
521
522 int qed_dmae_info_alloc(struct qed_hwfn *p_hwfn)
523 {
524 dma_addr_t *p_addr = &p_hwfn->dmae_info.completion_word_phys_addr;
525 struct dmae_cmd **p_cmd = &p_hwfn->dmae_info.p_dmae_cmd;
526 u32 **p_buff = &p_hwfn->dmae_info.p_intermediate_buffer;
527 u32 **p_comp = &p_hwfn->dmae_info.p_completion_word;
528
529 *p_comp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
530 sizeof(u32), p_addr, GFP_KERNEL);
531 if (!*p_comp)
532 goto err;
533
534 p_addr = &p_hwfn->dmae_info.dmae_cmd_phys_addr;
535 *p_cmd = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
536 sizeof(struct dmae_cmd),
537 p_addr, GFP_KERNEL);
538 if (!*p_cmd)
539 goto err;
540
541 p_addr = &p_hwfn->dmae_info.intermediate_buffer_phys_addr;
542 *p_buff = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
543 sizeof(u32) * DMAE_MAX_RW_SIZE,
544 p_addr, GFP_KERNEL);
545 if (!*p_buff)
546 goto err;
547
548 p_hwfn->dmae_info.channel = p_hwfn->rel_pf_id;
549
550 return 0;
551 err:
552 qed_dmae_info_free(p_hwfn);
553 return -ENOMEM;
554 }
555
556 void qed_dmae_info_free(struct qed_hwfn *p_hwfn)
557 {
558 dma_addr_t p_phys;
559
560 /* Just make sure no one is in the middle */
561 mutex_lock(&p_hwfn->dmae_info.mutex);
562
563 if (p_hwfn->dmae_info.p_completion_word) {
564 p_phys = p_hwfn->dmae_info.completion_word_phys_addr;
565 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
566 sizeof(u32),
567 p_hwfn->dmae_info.p_completion_word, p_phys);
568 p_hwfn->dmae_info.p_completion_word = NULL;
569 }
570
571 if (p_hwfn->dmae_info.p_dmae_cmd) {
572 p_phys = p_hwfn->dmae_info.dmae_cmd_phys_addr;
573 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
574 sizeof(struct dmae_cmd),
575 p_hwfn->dmae_info.p_dmae_cmd, p_phys);
576 p_hwfn->dmae_info.p_dmae_cmd = NULL;
577 }
578
579 if (p_hwfn->dmae_info.p_intermediate_buffer) {
580 p_phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
581 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
582 sizeof(u32) * DMAE_MAX_RW_SIZE,
583 p_hwfn->dmae_info.p_intermediate_buffer,
584 p_phys);
585 p_hwfn->dmae_info.p_intermediate_buffer = NULL;
586 }
587
588 mutex_unlock(&p_hwfn->dmae_info.mutex);
589 }
590
591 static int qed_dmae_operation_wait(struct qed_hwfn *p_hwfn)
592 {
593 u32 wait_cnt_limit = 10000, wait_cnt = 0;
594 int qed_status = 0;
595
596 barrier();
597 while (*p_hwfn->dmae_info.p_completion_word != DMAE_COMPLETION_VAL) {
598 udelay(DMAE_MIN_WAIT_TIME);
599 cond_resched();
600 if (++wait_cnt > wait_cnt_limit) {
601 DP_NOTICE(p_hwfn->cdev,
602 "Timed-out waiting for operation to complete. Completion word is 0x%08x expected 0x%08x.\n",
603 *p_hwfn->dmae_info.p_completion_word,
604 DMAE_COMPLETION_VAL);
605 qed_status = -EBUSY;
606 break;
607 }
608
609 /* to sync the completion_word since we are not
610 * using the volatile keyword for p_completion_word
611 */
612 barrier();
613 }
614
615 if (qed_status == 0)
616 *p_hwfn->dmae_info.p_completion_word = 0;
617
618 return qed_status;
619 }
620
621 static int qed_dmae_execute_sub_operation(struct qed_hwfn *p_hwfn,
622 struct qed_ptt *p_ptt,
623 u64 src_addr,
624 u64 dst_addr,
625 u8 src_type,
626 u8 dst_type,
627 u32 length_dw)
628 {
629 dma_addr_t phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
630 struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
631 int qed_status = 0;
632
633 switch (src_type) {
634 case QED_DMAE_ADDRESS_GRC:
635 case QED_DMAE_ADDRESS_HOST_PHYS:
636 cmd->src_addr_hi = cpu_to_le32(upper_32_bits(src_addr));
637 cmd->src_addr_lo = cpu_to_le32(lower_32_bits(src_addr));
638 break;
639 /* for virtual source addresses we use the intermediate buffer. */
640 case QED_DMAE_ADDRESS_HOST_VIRT:
641 cmd->src_addr_hi = cpu_to_le32(upper_32_bits(phys));
642 cmd->src_addr_lo = cpu_to_le32(lower_32_bits(phys));
643 memcpy(&p_hwfn->dmae_info.p_intermediate_buffer[0],
644 (void *)(uintptr_t)src_addr,
645 length_dw * sizeof(u32));
646 break;
647 default:
648 return -EINVAL;
649 }
650
651 switch (dst_type) {
652 case QED_DMAE_ADDRESS_GRC:
653 case QED_DMAE_ADDRESS_HOST_PHYS:
654 cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(dst_addr));
655 cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(dst_addr));
656 break;
657 /* for virtual source addresses we use the intermediate buffer. */
658 case QED_DMAE_ADDRESS_HOST_VIRT:
659 cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(phys));
660 cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(phys));
661 break;
662 default:
663 return -EINVAL;
664 }
665
666 cmd->length_dw = cpu_to_le16((u16)length_dw);
667
668 qed_dmae_post_command(p_hwfn, p_ptt);
669
670 qed_status = qed_dmae_operation_wait(p_hwfn);
671
672 if (qed_status) {
673 DP_NOTICE(p_hwfn,
674 "qed_dmae_host2grc: Wait Failed. source_addr 0x%llx, grc_addr 0x%llx, size_in_dwords 0x%x\n",
675 src_addr, dst_addr, length_dw);
676 return qed_status;
677 }
678
679 if (dst_type == QED_DMAE_ADDRESS_HOST_VIRT)
680 memcpy((void *)(uintptr_t)(dst_addr),
681 &p_hwfn->dmae_info.p_intermediate_buffer[0],
682 length_dw * sizeof(u32));
683
684 return 0;
685 }
686
687 static int qed_dmae_execute_command(struct qed_hwfn *p_hwfn,
688 struct qed_ptt *p_ptt,
689 u64 src_addr, u64 dst_addr,
690 u8 src_type, u8 dst_type,
691 u32 size_in_dwords,
692 struct qed_dmae_params *p_params)
693 {
694 dma_addr_t phys = p_hwfn->dmae_info.completion_word_phys_addr;
695 u16 length_cur = 0, i = 0, cnt_split = 0, length_mod = 0;
696 struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
697 u64 src_addr_split = 0, dst_addr_split = 0;
698 u16 length_limit = DMAE_MAX_RW_SIZE;
699 int qed_status = 0;
700 u32 offset = 0;
701
702 if (p_hwfn->cdev->recov_in_prog) {
703 DP_VERBOSE(p_hwfn,
704 NETIF_MSG_HW,
705 "Recovery is in progress. Avoid DMAE transaction [{src: addr 0x%llx, type %d}, {dst: addr 0x%llx, type %d}, size %d].\n",
706 src_addr, src_type, dst_addr, dst_type,
707 size_in_dwords);
708
709 /* Let the flow complete w/o any error handling */
710 return 0;
711 }
712
713 qed_dmae_opcode(p_hwfn,
714 (src_type == QED_DMAE_ADDRESS_GRC),
715 (dst_type == QED_DMAE_ADDRESS_GRC),
716 p_params);
717
718 cmd->comp_addr_lo = cpu_to_le32(lower_32_bits(phys));
719 cmd->comp_addr_hi = cpu_to_le32(upper_32_bits(phys));
720 cmd->comp_val = cpu_to_le32(DMAE_COMPLETION_VAL);
721
722 /* Check if the grc_addr is valid like < MAX_GRC_OFFSET */
723 cnt_split = size_in_dwords / length_limit;
724 length_mod = size_in_dwords % length_limit;
725
726 src_addr_split = src_addr;
727 dst_addr_split = dst_addr;
728
729 for (i = 0; i <= cnt_split; i++) {
730 offset = length_limit * i;
731
732 if (!QED_DMAE_FLAGS_IS_SET(p_params, RW_REPL_SRC)) {
733 if (src_type == QED_DMAE_ADDRESS_GRC)
734 src_addr_split = src_addr + offset;
735 else
736 src_addr_split = src_addr + (offset * 4);
737 }
738
739 if (dst_type == QED_DMAE_ADDRESS_GRC)
740 dst_addr_split = dst_addr + offset;
741 else
742 dst_addr_split = dst_addr + (offset * 4);
743
744 length_cur = (cnt_split == i) ? length_mod : length_limit;
745
746 /* might be zero on last iteration */
747 if (!length_cur)
748 continue;
749
750 qed_status = qed_dmae_execute_sub_operation(p_hwfn,
751 p_ptt,
752 src_addr_split,
753 dst_addr_split,
754 src_type,
755 dst_type,
756 length_cur);
757 if (qed_status) {
758 qed_hw_err_notify(p_hwfn, p_ptt, QED_HW_ERR_DMAE_FAIL,
759 "qed_dmae_execute_sub_operation Failed with error 0x%x. source_addr 0x%llx, destination addr 0x%llx, size_in_dwords 0x%x\n",
760 qed_status, src_addr,
761 dst_addr, length_cur);
762 break;
763 }
764 }
765
766 return qed_status;
767 }
768
769 int qed_dmae_host2grc(struct qed_hwfn *p_hwfn,
770 struct qed_ptt *p_ptt,
771 u64 source_addr, u32 grc_addr, u32 size_in_dwords,
772 struct qed_dmae_params *p_params)
773 {
774 u32 grc_addr_in_dw = grc_addr / sizeof(u32);
775 int rc;
776
777
778 mutex_lock(&p_hwfn->dmae_info.mutex);
779
780 rc = qed_dmae_execute_command(p_hwfn, p_ptt, source_addr,
781 grc_addr_in_dw,
782 QED_DMAE_ADDRESS_HOST_VIRT,
783 QED_DMAE_ADDRESS_GRC,
784 size_in_dwords, p_params);
785
786 mutex_unlock(&p_hwfn->dmae_info.mutex);
787
788 return rc;
789 }
790
791 int qed_dmae_grc2host(struct qed_hwfn *p_hwfn,
792 struct qed_ptt *p_ptt,
793 u32 grc_addr,
794 dma_addr_t dest_addr, u32 size_in_dwords,
795 struct qed_dmae_params *p_params)
796 {
797 u32 grc_addr_in_dw = grc_addr / sizeof(u32);
798 int rc;
799
800
801 mutex_lock(&p_hwfn->dmae_info.mutex);
802
803 rc = qed_dmae_execute_command(p_hwfn, p_ptt, grc_addr_in_dw,
804 dest_addr, QED_DMAE_ADDRESS_GRC,
805 QED_DMAE_ADDRESS_HOST_VIRT,
806 size_in_dwords, p_params);
807
808 mutex_unlock(&p_hwfn->dmae_info.mutex);
809
810 return rc;
811 }
812
813 int qed_dmae_host2host(struct qed_hwfn *p_hwfn,
814 struct qed_ptt *p_ptt,
815 dma_addr_t source_addr,
816 dma_addr_t dest_addr,
817 u32 size_in_dwords, struct qed_dmae_params *p_params)
818 {
819 int rc;
820
821 mutex_lock(&(p_hwfn->dmae_info.mutex));
822
823 rc = qed_dmae_execute_command(p_hwfn, p_ptt, source_addr,
824 dest_addr,
825 QED_DMAE_ADDRESS_HOST_PHYS,
826 QED_DMAE_ADDRESS_HOST_PHYS,
827 size_in_dwords, p_params);
828
829 mutex_unlock(&(p_hwfn->dmae_info.mutex));
830
831 return rc;
832 }
833
834 void qed_hw_err_notify(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
835 enum qed_hw_err_type err_type, const char *fmt, ...)
836 {
837 char buf[QED_HW_ERR_MAX_STR_SIZE];
838 va_list vl;
839 int len;
840
841 if (fmt) {
842 va_start(vl, fmt);
843 len = vsnprintf(buf, QED_HW_ERR_MAX_STR_SIZE, fmt, vl);
844 va_end(vl);
845
846 if (len > QED_HW_ERR_MAX_STR_SIZE - 1)
847 len = QED_HW_ERR_MAX_STR_SIZE - 1;
848
849 DP_NOTICE(p_hwfn, "%s", buf);
850 }
851
852 /* Fan failure cannot be masked by handling of another HW error */
853 if (p_hwfn->cdev->recov_in_prog &&
854 err_type != QED_HW_ERR_FAN_FAIL) {
855 DP_VERBOSE(p_hwfn,
856 NETIF_MSG_DRV,
857 "Recovery is in progress. Avoid notifying about HW error %d.\n",
858 err_type);
859 return;
860 }
861
862 qed_hw_error_occurred(p_hwfn, err_type);
863
864 if (fmt)
865 qed_mcp_send_raw_debug_data(p_hwfn, p_ptt, buf, len);
866 }
867
868 int qed_dmae_sanity(struct qed_hwfn *p_hwfn,
869 struct qed_ptt *p_ptt, const char *phase)
870 {
871 u32 size = PAGE_SIZE / 2, val;
872 int rc = 0;
873 dma_addr_t p_phys;
874 void *p_virt;
875 u32 *p_tmp;
876
877 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
878 2 * size, &p_phys, GFP_KERNEL);
879 if (!p_virt) {
880 DP_NOTICE(p_hwfn,
881 "DMAE sanity [%s]: failed to allocate memory\n",
882 phase);
883 return -ENOMEM;
884 }
885
886 /* Fill the bottom half of the allocated memory with a known pattern */
887 for (p_tmp = (u32 *)p_virt;
888 p_tmp < (u32 *)((u8 *)p_virt + size); p_tmp++) {
889 /* Save the address itself as the value */
890 val = (u32)(uintptr_t)p_tmp;
891 *p_tmp = val;
892 }
893
894 /* Zero the top half of the allocated memory */
895 memset((u8 *)p_virt + size, 0, size);
896
897 DP_VERBOSE(p_hwfn,
898 QED_MSG_SP,
899 "DMAE sanity [%s]: src_addr={phys 0x%llx, virt %p}, dst_addr={phys 0x%llx, virt %p}, size 0x%x\n",
900 phase,
901 (u64)p_phys,
902 p_virt, (u64)(p_phys + size), (u8 *)p_virt + size, size);
903
904 rc = qed_dmae_host2host(p_hwfn, p_ptt, p_phys, p_phys + size,
905 size / 4, NULL);
906 if (rc) {
907 DP_NOTICE(p_hwfn,
908 "DMAE sanity [%s]: qed_dmae_host2host() failed. rc = %d.\n",
909 phase, rc);
910 goto out;
911 }
912
913 /* Verify that the top half of the allocated memory has the pattern */
914 for (p_tmp = (u32 *)((u8 *)p_virt + size);
915 p_tmp < (u32 *)((u8 *)p_virt + (2 * size)); p_tmp++) {
916 /* The corresponding address in the bottom half */
917 val = (u32)(uintptr_t)p_tmp - size;
918
919 if (*p_tmp != val) {
920 DP_NOTICE(p_hwfn,
921 "DMAE sanity [%s]: addr={phys 0x%llx, virt %p}, read_val 0x%08x, expected_val 0x%08x\n",
922 phase,
923 (u64)p_phys + ((u8 *)p_tmp - (u8 *)p_virt),
924 p_tmp, *p_tmp, val);
925 rc = -EINVAL;
926 goto out;
927 }
928 }
929
930 out:
931 dma_free_coherent(&p_hwfn->cdev->pdev->dev, 2 * size, p_virt, p_phys);
932 return rc;
933 }
Kernel DRM miscellaneous fixes and cross-tree changes