1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2017 Pengutronix, Jan Luebbe <kernel@pengutronix.de>
4 */
5
6 #include <linux/kernel.h>
7 #include <linux/edac.h>
8 #include <linux/of_platform.h>
9
10 #include <asm/hardware/cache-l2x0.h>
11 #include <asm/hardware/cache-aurora-l2.h>
12
13 #include "edac_mc.h"
14 #include "edac_device.h"
15 #include "edac_module.h"
16
17 /************************ EDAC MC (DDR RAM) ********************************/
18
19 #define SDRAM_NUM_CS 4
20
21 #define SDRAM_CONFIG_REG 0x0
22 #define SDRAM_CONFIG_ECC_MASK BIT(18)
23 #define SDRAM_CONFIG_REGISTERED_MASK BIT(17)
24 #define SDRAM_CONFIG_BUS_WIDTH_MASK BIT(15)
25
26 #define SDRAM_ADDR_CTRL_REG 0x10
27 #define SDRAM_ADDR_CTRL_SIZE_HIGH_OFFSET(cs) (20+cs)
28 #define SDRAM_ADDR_CTRL_SIZE_HIGH_MASK(cs) (0x1 << SDRAM_ADDR_CTRL_SIZE_HIGH_OFFSET(cs))
29 #define SDRAM_ADDR_CTRL_ADDR_SEL_MASK(cs) BIT(16+cs)
30 #define SDRAM_ADDR_CTRL_SIZE_LOW_OFFSET(cs) (cs*4+2)
31 #define SDRAM_ADDR_CTRL_SIZE_LOW_MASK(cs) (0x3 << SDRAM_ADDR_CTRL_SIZE_LOW_OFFSET(cs))
32 #define SDRAM_ADDR_CTRL_STRUCT_OFFSET(cs) (cs*4)
33 #define SDRAM_ADDR_CTRL_STRUCT_MASK(cs) (0x3 << SDRAM_ADDR_CTRL_STRUCT_OFFSET(cs))
34
35 #define SDRAM_ERR_DATA_H_REG 0x40
36 #define SDRAM_ERR_DATA_L_REG 0x44
37
38 #define SDRAM_ERR_RECV_ECC_REG 0x48
39 #define SDRAM_ERR_RECV_ECC_VALUE_MASK 0xff
40
41 #define SDRAM_ERR_CALC_ECC_REG 0x4c
42 #define SDRAM_ERR_CALC_ECC_ROW_OFFSET 8
43 #define SDRAM_ERR_CALC_ECC_ROW_MASK (0xffff << SDRAM_ERR_CALC_ECC_ROW_OFFSET)
44 #define SDRAM_ERR_CALC_ECC_VALUE_MASK 0xff
45
46 #define SDRAM_ERR_ADDR_REG 0x50
47 #define SDRAM_ERR_ADDR_BANK_OFFSET 23
48 #define SDRAM_ERR_ADDR_BANK_MASK (0x7 << SDRAM_ERR_ADDR_BANK_OFFSET)
49 #define SDRAM_ERR_ADDR_COL_OFFSET 8
50 #define SDRAM_ERR_ADDR_COL_MASK (0x7fff << SDRAM_ERR_ADDR_COL_OFFSET)
51 #define SDRAM_ERR_ADDR_CS_OFFSET 1
52 #define SDRAM_ERR_ADDR_CS_MASK (0x3 << SDRAM_ERR_ADDR_CS_OFFSET)
53 #define SDRAM_ERR_ADDR_TYPE_MASK BIT(0)
54
55 #define SDRAM_ERR_CTRL_REG 0x54
56 #define SDRAM_ERR_CTRL_THR_OFFSET 16
57 #define SDRAM_ERR_CTRL_THR_MASK (0xff << SDRAM_ERR_CTRL_THR_OFFSET)
58 #define SDRAM_ERR_CTRL_PROP_MASK BIT(9)
59
60 #define SDRAM_ERR_SBE_COUNT_REG 0x58
61 #define SDRAM_ERR_DBE_COUNT_REG 0x5c
62
63 #define SDRAM_ERR_CAUSE_ERR_REG 0xd0
64 #define SDRAM_ERR_CAUSE_MSG_REG 0xd8
65 #define SDRAM_ERR_CAUSE_DBE_MASK BIT(1)
66 #define SDRAM_ERR_CAUSE_SBE_MASK BIT(0)
67
68 #define SDRAM_RANK_CTRL_REG 0x1e0
69 #define SDRAM_RANK_CTRL_EXIST_MASK(cs) BIT(cs)
70
71 struct axp_mc_drvdata {
72 void __iomem *base;
73 /* width in bytes */
74 unsigned int width;
75 /* bank interleaving */
76 bool cs_addr_sel[SDRAM_NUM_CS];
77
78 char msg[128];
79 };
80
81 /* derived from "DRAM Address Multiplexing" in the ARMADA XP Functional Spec */
axp_mc_calc_address(struct axp_mc_drvdata * drvdata,uint8_t cs,uint8_t bank,uint16_t row,uint16_t col)82 static uint32_t axp_mc_calc_address(struct axp_mc_drvdata *drvdata,
83 uint8_t cs, uint8_t bank, uint16_t row,
84 uint16_t col)
85 {
86 if (drvdata->width == 8) {
87 /* 64 bit */
88 if (drvdata->cs_addr_sel[cs])
89 /* bank interleaved */
90 return (((row & 0xfff8) << 16) |
91 ((bank & 0x7) << 16) |
92 ((row & 0x7) << 13) |
93 ((col & 0x3ff) << 3));
94 else
95 return (((row & 0xffff << 16) |
96 ((bank & 0x7) << 13) |
97 ((col & 0x3ff)) << 3));
98 } else if (drvdata->width == 4) {
99 /* 32 bit */
100 if (drvdata->cs_addr_sel[cs])
101 /* bank interleaved */
102 return (((row & 0xfff0) << 15) |
103 ((bank & 0x7) << 16) |
104 ((row & 0xf) << 12) |
105 ((col & 0x3ff) << 2));
106 else
107 return (((row & 0xffff << 15) |
108 ((bank & 0x7) << 12) |
109 ((col & 0x3ff)) << 2));
110 } else {
111 /* 16 bit */
112 if (drvdata->cs_addr_sel[cs])
113 /* bank interleaved */
114 return (((row & 0xffe0) << 14) |
115 ((bank & 0x7) << 16) |
116 ((row & 0x1f) << 11) |
117 ((col & 0x3ff) << 1));
118 else
119 return (((row & 0xffff << 14) |
120 ((bank & 0x7) << 11) |
121 ((col & 0x3ff)) << 1));
122 }
123 }
124
axp_mc_check(struct mem_ctl_info * mci)125 static void axp_mc_check(struct mem_ctl_info *mci)
126 {
127 struct axp_mc_drvdata *drvdata = mci->pvt_info;
128 uint32_t data_h, data_l, recv_ecc, calc_ecc, addr;
129 uint32_t cnt_sbe, cnt_dbe, cause_err, cause_msg;
130 uint32_t row_val, col_val, bank_val, addr_val;
131 uint8_t syndrome_val, cs_val;
132 char *msg = drvdata->msg;
133
134 data_h = readl(drvdata->base + SDRAM_ERR_DATA_H_REG);
135 data_l = readl(drvdata->base + SDRAM_ERR_DATA_L_REG);
136 recv_ecc = readl(drvdata->base + SDRAM_ERR_RECV_ECC_REG);
137 calc_ecc = readl(drvdata->base + SDRAM_ERR_CALC_ECC_REG);
138 addr = readl(drvdata->base + SDRAM_ERR_ADDR_REG);
139 cnt_sbe = readl(drvdata->base + SDRAM_ERR_SBE_COUNT_REG);
140 cnt_dbe = readl(drvdata->base + SDRAM_ERR_DBE_COUNT_REG);
141 cause_err = readl(drvdata->base + SDRAM_ERR_CAUSE_ERR_REG);
142 cause_msg = readl(drvdata->base + SDRAM_ERR_CAUSE_MSG_REG);
143
144 /* clear cause registers */
145 writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK),
146 drvdata->base + SDRAM_ERR_CAUSE_ERR_REG);
147 writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK),
148 drvdata->base + SDRAM_ERR_CAUSE_MSG_REG);
149
150 /* clear error counter registers */
151 if (cnt_sbe)
152 writel(0, drvdata->base + SDRAM_ERR_SBE_COUNT_REG);
153 if (cnt_dbe)
154 writel(0, drvdata->base + SDRAM_ERR_DBE_COUNT_REG);
155
156 if (!cnt_sbe && !cnt_dbe)
157 return;
158
159 if (!(addr & SDRAM_ERR_ADDR_TYPE_MASK)) {
160 if (cnt_sbe)
161 cnt_sbe--;
162 else
163 dev_warn(mci->pdev, "inconsistent SBE count detected\n");
164 } else {
165 if (cnt_dbe)
166 cnt_dbe--;
167 else
168 dev_warn(mci->pdev, "inconsistent DBE count detected\n");
169 }
170
171 /* report earlier errors */
172 if (cnt_sbe)
173 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
174 cnt_sbe, /* error count */
175 0, 0, 0, /* pfn, offset, syndrome */
176 -1, -1, -1, /* top, mid, low layer */
177 mci->ctl_name,
178 "details unavailable (multiple errors)");
179 if (cnt_dbe)
180 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
181 cnt_dbe, /* error count */
182 0, 0, 0, /* pfn, offset, syndrome */
183 -1, -1, -1, /* top, mid, low layer */
184 mci->ctl_name,
185 "details unavailable (multiple errors)");
186
187 /* report details for most recent error */
188 cs_val = (addr & SDRAM_ERR_ADDR_CS_MASK) >> SDRAM_ERR_ADDR_CS_OFFSET;
189 bank_val = (addr & SDRAM_ERR_ADDR_BANK_MASK) >> SDRAM_ERR_ADDR_BANK_OFFSET;
190 row_val = (calc_ecc & SDRAM_ERR_CALC_ECC_ROW_MASK) >> SDRAM_ERR_CALC_ECC_ROW_OFFSET;
191 col_val = (addr & SDRAM_ERR_ADDR_COL_MASK) >> SDRAM_ERR_ADDR_COL_OFFSET;
192 syndrome_val = (recv_ecc ^ calc_ecc) & 0xff;
193 addr_val = axp_mc_calc_address(drvdata, cs_val, bank_val, row_val,
194 col_val);
195 msg += sprintf(msg, "row=0x%04x ", row_val); /* 11 chars */
196 msg += sprintf(msg, "bank=0x%x ", bank_val); /* 9 chars */
197 msg += sprintf(msg, "col=0x%04x ", col_val); /* 11 chars */
198 msg += sprintf(msg, "cs=%d", cs_val); /* 4 chars */
199
200 if (!(addr & SDRAM_ERR_ADDR_TYPE_MASK)) {
201 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
202 1, /* error count */
203 addr_val >> PAGE_SHIFT,
204 addr_val & ~PAGE_MASK,
205 syndrome_val,
206 cs_val, -1, -1, /* top, mid, low layer */
207 mci->ctl_name, drvdata->msg);
208 } else {
209 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
210 1, /* error count */
211 addr_val >> PAGE_SHIFT,
212 addr_val & ~PAGE_MASK,
213 syndrome_val,
214 cs_val, -1, -1, /* top, mid, low layer */
215 mci->ctl_name, drvdata->msg);
216 }
217 }
218
axp_mc_read_config(struct mem_ctl_info * mci)219 static void axp_mc_read_config(struct mem_ctl_info *mci)
220 {
221 struct axp_mc_drvdata *drvdata = mci->pvt_info;
222 uint32_t config, addr_ctrl, rank_ctrl;
223 unsigned int i, cs_struct, cs_size;
224 struct dimm_info *dimm;
225
226 config = readl(drvdata->base + SDRAM_CONFIG_REG);
227 if (config & SDRAM_CONFIG_BUS_WIDTH_MASK)
228 /* 64 bit */
229 drvdata->width = 8;
230 else
231 /* 32 bit */
232 drvdata->width = 4;
233
234 addr_ctrl = readl(drvdata->base + SDRAM_ADDR_CTRL_REG);
235 rank_ctrl = readl(drvdata->base + SDRAM_RANK_CTRL_REG);
236 for (i = 0; i < SDRAM_NUM_CS; i++) {
237 dimm = mci->dimms[i];
238
239 if (!(rank_ctrl & SDRAM_RANK_CTRL_EXIST_MASK(i)))
240 continue;
241
242 drvdata->cs_addr_sel[i] =
243 !!(addr_ctrl & SDRAM_ADDR_CTRL_ADDR_SEL_MASK(i));
244
245 cs_struct = (addr_ctrl & SDRAM_ADDR_CTRL_STRUCT_MASK(i)) >> SDRAM_ADDR_CTRL_STRUCT_OFFSET(i);
246 cs_size = ((addr_ctrl & SDRAM_ADDR_CTRL_SIZE_HIGH_MASK(i)) >> (SDRAM_ADDR_CTRL_SIZE_HIGH_OFFSET(i) - 2) |
247 ((addr_ctrl & SDRAM_ADDR_CTRL_SIZE_LOW_MASK(i)) >> SDRAM_ADDR_CTRL_SIZE_LOW_OFFSET(i)));
248
249 switch (cs_size) {
250 case 0: /* 2GBit */
251 dimm->nr_pages = 524288;
252 break;
253 case 1: /* 256MBit */
254 dimm->nr_pages = 65536;
255 break;
256 case 2: /* 512MBit */
257 dimm->nr_pages = 131072;
258 break;
259 case 3: /* 1GBit */
260 dimm->nr_pages = 262144;
261 break;
262 case 4: /* 4GBit */
263 dimm->nr_pages = 1048576;
264 break;
265 case 5: /* 8GBit */
266 dimm->nr_pages = 2097152;
267 break;
268 }
269 dimm->grain = 8;
270 dimm->dtype = cs_struct ? DEV_X16 : DEV_X8;
271 dimm->mtype = (config & SDRAM_CONFIG_REGISTERED_MASK) ?
272 MEM_RDDR3 : MEM_DDR3;
273 dimm->edac_mode = EDAC_SECDED;
274 }
275 }
276
277 static const struct of_device_id axp_mc_of_match[] = {
278 {.compatible = "marvell,armada-xp-sdram-controller",},
279 {},
280 };
281 MODULE_DEVICE_TABLE(of, axp_mc_of_match);
282
axp_mc_probe(struct platform_device * pdev)283 static int axp_mc_probe(struct platform_device *pdev)
284 {
285 struct axp_mc_drvdata *drvdata;
286 struct edac_mc_layer layers[1];
287 const struct of_device_id *id;
288 struct mem_ctl_info *mci;
289 struct resource *r;
290 void __iomem *base;
291 uint32_t config;
292
293 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
294 if (!r) {
295 dev_err(&pdev->dev, "Unable to get mem resource\n");
296 return -ENODEV;
297 }
298
299 base = devm_ioremap_resource(&pdev->dev, r);
300 if (IS_ERR(base)) {
301 dev_err(&pdev->dev, "Unable to map regs\n");
302 return PTR_ERR(base);
303 }
304
305 config = readl(base + SDRAM_CONFIG_REG);
306 if (!(config & SDRAM_CONFIG_ECC_MASK)) {
307 dev_warn(&pdev->dev, "SDRAM ECC is not enabled\n");
308 return -EINVAL;
309 }
310
311 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
312 layers[0].size = SDRAM_NUM_CS;
313 layers[0].is_virt_csrow = true;
314
315 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*drvdata));
316 if (!mci)
317 return -ENOMEM;
318
319 drvdata = mci->pvt_info;
320 drvdata->base = base;
321 mci->pdev = &pdev->dev;
322 platform_set_drvdata(pdev, mci);
323
324 id = of_match_device(axp_mc_of_match, &pdev->dev);
325 mci->edac_check = axp_mc_check;
326 mci->mtype_cap = MEM_FLAG_DDR3;
327 mci->edac_cap = EDAC_FLAG_SECDED;
328 mci->mod_name = pdev->dev.driver->name;
329 mci->ctl_name = id ? id->compatible : "unknown";
330 mci->dev_name = dev_name(&pdev->dev);
331 mci->scrub_mode = SCRUB_NONE;
332
333 axp_mc_read_config(mci);
334
335 /* These SoCs have a reduced width bus */
336 if (of_machine_is_compatible("marvell,armada380") ||
337 of_machine_is_compatible("marvell,armadaxp-98dx3236"))
338 drvdata->width /= 2;
339
340 /* configure SBE threshold */
341 /* it seems that SBEs are not captured otherwise */
342 writel(1 << SDRAM_ERR_CTRL_THR_OFFSET, drvdata->base + SDRAM_ERR_CTRL_REG);
343
344 /* clear cause registers */
345 writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK), drvdata->base + SDRAM_ERR_CAUSE_ERR_REG);
346 writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK), drvdata->base + SDRAM_ERR_CAUSE_MSG_REG);
347
348 /* clear counter registers */
349 writel(0, drvdata->base + SDRAM_ERR_SBE_COUNT_REG);
350 writel(0, drvdata->base + SDRAM_ERR_DBE_COUNT_REG);
351
352 if (edac_mc_add_mc(mci)) {
353 edac_mc_free(mci);
354 return -EINVAL;
355 }
356 edac_op_state = EDAC_OPSTATE_POLL;
357
358 return 0;
359 }
360
axp_mc_remove(struct platform_device * pdev)361 static int axp_mc_remove(struct platform_device *pdev)
362 {
363 struct mem_ctl_info *mci = platform_get_drvdata(pdev);
364
365 edac_mc_del_mc(&pdev->dev);
366 edac_mc_free(mci);
367 platform_set_drvdata(pdev, NULL);
368
369 return 0;
370 }
371
372 static struct platform_driver axp_mc_driver = {
373 .probe = axp_mc_probe,
374 .remove = axp_mc_remove,
375 .driver = {
376 .name = "armada_xp_mc_edac",
377 .of_match_table = of_match_ptr(axp_mc_of_match),
378 },
379 };
380
381 /************************ EDAC Device (L2 Cache) ***************************/
382
383 struct aurora_l2_drvdata {
384 void __iomem *base;
385
386 char msg[128];
387
388 /* error injection via debugfs */
389 uint32_t inject_addr;
390 uint32_t inject_mask;
391 uint8_t inject_ctl;
392
393 struct dentry *debugfs;
394 };
395
396 #ifdef CONFIG_EDAC_DEBUG
aurora_l2_inject(struct aurora_l2_drvdata * drvdata)397 static void aurora_l2_inject(struct aurora_l2_drvdata *drvdata)
398 {
399 drvdata->inject_addr &= AURORA_ERR_INJECT_CTL_ADDR_MASK;
400 drvdata->inject_ctl &= AURORA_ERR_INJECT_CTL_EN_MASK;
401 writel(0, drvdata->base + AURORA_ERR_INJECT_CTL_REG);
402 writel(drvdata->inject_mask, drvdata->base + AURORA_ERR_INJECT_MASK_REG);
403 writel(drvdata->inject_addr | drvdata->inject_ctl, drvdata->base + AURORA_ERR_INJECT_CTL_REG);
404 }
405 #endif
406
aurora_l2_check(struct edac_device_ctl_info * dci)407 static void aurora_l2_check(struct edac_device_ctl_info *dci)
408 {
409 struct aurora_l2_drvdata *drvdata = dci->pvt_info;
410 uint32_t cnt, src, txn, err, attr_cap, addr_cap, way_cap;
411 unsigned int cnt_ce, cnt_ue;
412 char *msg = drvdata->msg;
413 size_t size = sizeof(drvdata->msg);
414 size_t len = 0;
415
416 cnt = readl(drvdata->base + AURORA_ERR_CNT_REG);
417 attr_cap = readl(drvdata->base + AURORA_ERR_ATTR_CAP_REG);
418 addr_cap = readl(drvdata->base + AURORA_ERR_ADDR_CAP_REG);
419 way_cap = readl(drvdata->base + AURORA_ERR_WAY_CAP_REG);
420
421 cnt_ce = (cnt & AURORA_ERR_CNT_CE_MASK) >> AURORA_ERR_CNT_CE_OFFSET;
422 cnt_ue = (cnt & AURORA_ERR_CNT_UE_MASK) >> AURORA_ERR_CNT_UE_OFFSET;
423 /* clear error counter registers */
424 if (cnt_ce || cnt_ue)
425 writel(AURORA_ERR_CNT_CLR, drvdata->base + AURORA_ERR_CNT_REG);
426
427 if (!(attr_cap & AURORA_ERR_ATTR_CAP_VALID))
428 goto clear_remaining;
429
430 src = (attr_cap & AURORA_ERR_ATTR_SRC_MSK) >> AURORA_ERR_ATTR_SRC_OFF;
431 if (src <= 3)
432 len += scnprintf(msg+len, size-len, "src=CPU%d ", src);
433 else
434 len += scnprintf(msg+len, size-len, "src=IO ");
435
436 txn = (attr_cap & AURORA_ERR_ATTR_TXN_MSK) >> AURORA_ERR_ATTR_TXN_OFF;
437 switch (txn) {
438 case 0:
439 len += scnprintf(msg+len, size-len, "txn=Data-Read ");
440 break;
441 case 1:
442 len += scnprintf(msg+len, size-len, "txn=Isn-Read ");
443 break;
444 case 2:
445 len += scnprintf(msg+len, size-len, "txn=Clean-Flush ");
446 break;
447 case 3:
448 len += scnprintf(msg+len, size-len, "txn=Eviction ");
449 break;
450 case 4:
451 len += scnprintf(msg+len, size-len,
452 "txn=Read-Modify-Write ");
453 break;
454 }
455
456 err = (attr_cap & AURORA_ERR_ATTR_ERR_MSK) >> AURORA_ERR_ATTR_ERR_OFF;
457 switch (err) {
458 case 0:
459 len += scnprintf(msg+len, size-len, "err=CorrECC ");
460 break;
461 case 1:
462 len += scnprintf(msg+len, size-len, "err=UnCorrECC ");
463 break;
464 case 2:
465 len += scnprintf(msg+len, size-len, "err=TagParity ");
466 break;
467 }
468
469 len += scnprintf(msg+len, size-len, "addr=0x%x ", addr_cap & AURORA_ERR_ADDR_CAP_ADDR_MASK);
470 len += scnprintf(msg+len, size-len, "index=0x%x ", (way_cap & AURORA_ERR_WAY_IDX_MSK) >> AURORA_ERR_WAY_IDX_OFF);
471 len += scnprintf(msg+len, size-len, "way=0x%x", (way_cap & AURORA_ERR_WAY_CAP_WAY_MASK) >> AURORA_ERR_WAY_CAP_WAY_OFFSET);
472
473 /* clear error capture registers */
474 writel(AURORA_ERR_ATTR_CAP_VALID, drvdata->base + AURORA_ERR_ATTR_CAP_REG);
475 if (err) {
476 /* UnCorrECC or TagParity */
477 if (cnt_ue)
478 cnt_ue--;
479 edac_device_handle_ue(dci, 0, 0, drvdata->msg);
480 } else {
481 if (cnt_ce)
482 cnt_ce--;
483 edac_device_handle_ce(dci, 0, 0, drvdata->msg);
484 }
485
486 clear_remaining:
487 /* report remaining errors */
488 while (cnt_ue--)
489 edac_device_handle_ue(dci, 0, 0, "details unavailable (multiple errors)");
490 while (cnt_ce--)
491 edac_device_handle_ue(dci, 0, 0, "details unavailable (multiple errors)");
492 }
493
aurora_l2_poll(struct edac_device_ctl_info * dci)494 static void aurora_l2_poll(struct edac_device_ctl_info *dci)
495 {
496 #ifdef CONFIG_EDAC_DEBUG
497 struct aurora_l2_drvdata *drvdata = dci->pvt_info;
498 #endif
499
500 aurora_l2_check(dci);
501 #ifdef CONFIG_EDAC_DEBUG
502 aurora_l2_inject(drvdata);
503 #endif
504 }
505
506 static const struct of_device_id aurora_l2_of_match[] = {
507 {.compatible = "marvell,aurora-system-cache",},
508 {},
509 };
510 MODULE_DEVICE_TABLE(of, aurora_l2_of_match);
511
aurora_l2_probe(struct platform_device * pdev)512 static int aurora_l2_probe(struct platform_device *pdev)
513 {
514 struct aurora_l2_drvdata *drvdata;
515 struct edac_device_ctl_info *dci;
516 const struct of_device_id *id;
517 uint32_t l2x0_aux_ctrl;
518 void __iomem *base;
519 struct resource *r;
520
521 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
522 if (!r) {
523 dev_err(&pdev->dev, "Unable to get mem resource\n");
524 return -ENODEV;
525 }
526
527 base = devm_ioremap_resource(&pdev->dev, r);
528 if (IS_ERR(base)) {
529 dev_err(&pdev->dev, "Unable to map regs\n");
530 return PTR_ERR(base);
531 }
532
533 l2x0_aux_ctrl = readl(base + L2X0_AUX_CTRL);
534 if (!(l2x0_aux_ctrl & AURORA_ACR_PARITY_EN))
535 dev_warn(&pdev->dev, "tag parity is not enabled\n");
536 if (!(l2x0_aux_ctrl & AURORA_ACR_ECC_EN))
537 dev_warn(&pdev->dev, "data ECC is not enabled\n");
538
539 dci = edac_device_alloc_ctl_info(sizeof(*drvdata),
540 "cpu", 1, "L", 1, 2, NULL, 0, 0);
541 if (!dci)
542 return -ENOMEM;
543
544 drvdata = dci->pvt_info;
545 drvdata->base = base;
546 dci->dev = &pdev->dev;
547 platform_set_drvdata(pdev, dci);
548
549 id = of_match_device(aurora_l2_of_match, &pdev->dev);
550 dci->edac_check = aurora_l2_poll;
551 dci->mod_name = pdev->dev.driver->name;
552 dci->ctl_name = id ? id->compatible : "unknown";
553 dci->dev_name = dev_name(&pdev->dev);
554
555 /* clear registers */
556 writel(AURORA_ERR_CNT_CLR, drvdata->base + AURORA_ERR_CNT_REG);
557 writel(AURORA_ERR_ATTR_CAP_VALID, drvdata->base + AURORA_ERR_ATTR_CAP_REG);
558
559 if (edac_device_add_device(dci)) {
560 edac_device_free_ctl_info(dci);
561 return -EINVAL;
562 }
563
564 #ifdef CONFIG_EDAC_DEBUG
565 drvdata->debugfs = edac_debugfs_create_dir(dev_name(&pdev->dev));
566 if (drvdata->debugfs) {
567 edac_debugfs_create_x32("inject_addr", 0644,
568 drvdata->debugfs,
569 &drvdata->inject_addr);
570 edac_debugfs_create_x32("inject_mask", 0644,
571 drvdata->debugfs,
572 &drvdata->inject_mask);
573 edac_debugfs_create_x8("inject_ctl", 0644,
574 drvdata->debugfs, &drvdata->inject_ctl);
575 }
576 #endif
577
578 return 0;
579 }
580
aurora_l2_remove(struct platform_device * pdev)581 static int aurora_l2_remove(struct platform_device *pdev)
582 {
583 struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
584 #ifdef CONFIG_EDAC_DEBUG
585 struct aurora_l2_drvdata *drvdata = dci->pvt_info;
586
587 edac_debugfs_remove_recursive(drvdata->debugfs);
588 #endif
589 edac_device_del_device(&pdev->dev);
590 edac_device_free_ctl_info(dci);
591 platform_set_drvdata(pdev, NULL);
592
593 return 0;
594 }
595
596 static struct platform_driver aurora_l2_driver = {
597 .probe = aurora_l2_probe,
598 .remove = aurora_l2_remove,
599 .driver = {
600 .name = "aurora_l2_edac",
601 .of_match_table = of_match_ptr(aurora_l2_of_match),
602 },
603 };
604
605 /************************ Driver registration ******************************/
606
607 static struct platform_driver * const drivers[] = {
608 &axp_mc_driver,
609 &aurora_l2_driver,
610 };
611
armada_xp_edac_init(void)612 static int __init armada_xp_edac_init(void)
613 {
614 int res;
615
616 /* only polling is supported */
617 edac_op_state = EDAC_OPSTATE_POLL;
618
619 res = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
620 if (res)
621 pr_warn("Armada XP EDAC drivers fail to register\n");
622
623 return 0;
624 }
625 module_init(armada_xp_edac_init);
626
armada_xp_edac_exit(void)627 static void __exit armada_xp_edac_exit(void)
628 {
629 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
630 }
631 module_exit(armada_xp_edac_exit);
632
633 MODULE_LICENSE("GPL v2");
634 MODULE_AUTHOR("Pengutronix");
635 MODULE_DESCRIPTION("EDAC Drivers for Marvell Armada XP SDRAM and L2 Cache Controller");
636
