1 // SPDX-License-Identifier: GPL-2.0
4  * EDAC driver for DMC-520 memory controller.
25 /* DMC-520 registers */
43 /* DMC-520 types, masks and bitfields */
78  * The max-length message would be: "rank:7 bank:15 row:262143 col:1023".
79  * Max length is 34. Using a 40-size buffer is enough.
82 #define EDAC_MOD_NAME				"dmc520-edac"
85 /* the data bus width for the attached memory chips. */
165  * error_lock is to protect concurrent writes to the mci->error_desc through
180 	return readl(pvt->reg_base + offset);  in dmc520_read_reg()
185 	writel(val, pvt->reg_base + offset);  in dmc520_write_reg()
244 		info->col = FIELD_GET(REG_FIELD_ERR_INFO_LOW_COL, reg_val_low);  in dmc520_get_dram_ecc_error_info()
245 		info->row = FIELD_GET(REG_FIELD_ERR_INFO_LOW_ROW, reg_val_low);  in dmc520_get_dram_ecc_error_info()
246 		info->rank = FIELD_GET(REG_FIELD_ERR_INFO_LOW_RANK, reg_val_low);  in dmc520_get_dram_ecc_error_info()
247 		info->bank = FIELD_GET(REG_FIELD_ERR_INFO_HIGH_BANK, reg_val_high);  in dmc520_get_dram_ecc_error_info()
275 /* Get the memory data bus width, in number of bytes. */
362 	return (u64)pvt->mem_width_in_bytes << (col_bits + row_bits + bank_bits);  in dmc520_get_rank_size()
368 	struct dmc520_edac *pvt = mci->pvt_info;  in dmc520_handle_dram_ecc_errors()
384 	spin_lock(&pvt->error_lock);  in dmc520_handle_dram_ecc_errors()
387 			     mci, cnt, 0, 0, 0, info.rank, -1, -1,  in dmc520_handle_dram_ecc_errors()
389 	spin_unlock(&pvt->error_lock);  in dmc520_handle_dram_ecc_errors()
395 	struct dmc520_edac *pvt = mci->pvt_info;  in dmc520_edac_dram_ecc_isr()
410 	struct dmc520_edac *pvt = mci->pvt_info;  in dmc520_edac_dram_all_isr()
430 	struct dmc520_edac *pvt = mci->pvt_info;  in dmc520_isr()
435 		if (pvt->irqs[idx] == irq) {  in dmc520_isr()
436 			mask = pvt->masks[idx];  in dmc520_isr()
445 	struct dmc520_edac *pvt = mci->pvt_info;  in dmc520_init_csrow()
459 	for (row = 0; row < mci->nr_csrows; row++) {  in dmc520_init_csrow()
460 		csi = mci->csrows[row];  in dmc520_init_csrow()
462 		for (ch = 0; ch < csi->nr_channels; ch++) {  in dmc520_init_csrow()
463 			dimm		= csi->channels[ch]->dimm;  in dmc520_init_csrow()
464 			dimm->grain	= pvt->mem_width_in_bytes;  in dmc520_init_csrow()
465 			dimm->dtype	= dt;  in dmc520_init_csrow()
466 			dimm->mtype	= mt;  in dmc520_init_csrow()
467 			dimm->edac_mode	= EDAC_SECDED;  in dmc520_init_csrow()
468 			dimm->nr_pages	= pages_per_rank / csi->nr_channels;  in dmc520_init_csrow()
476 	int irqs[NUMBER_OF_IRQS] = { -ENXIO };  in dmc520_edac_probe()
488 	dev = &pdev->dev;  in dmc520_edac_probe()
503 		return -EINVAL;  in dmc520_edac_probe()
512 		return -ENXIO;  in dmc520_edac_probe()
522 		ret = -ENOMEM;  in dmc520_edac_probe()
526 	pvt = mci->pvt_info;  in dmc520_edac_probe()
528 	pvt->reg_base = reg_base;  in dmc520_edac_probe()
529 	spin_lock_init(&pvt->error_lock);  in dmc520_edac_probe()
530 	memcpy(pvt->irqs, irqs, sizeof(irqs));  in dmc520_edac_probe()
531 	memcpy(pvt->masks, masks, sizeof(masks));  in dmc520_edac_probe()
535 	mci->pdev = dev;  in dmc520_edac_probe()
536 	mci->mtype_cap		= MEM_FLAG_DDR3 | MEM_FLAG_DDR4;  in dmc520_edac_probe()
537 	mci->edac_ctl_cap	= EDAC_FLAG_NONE | EDAC_FLAG_SECDED;  in dmc520_edac_probe()
538 	mci->edac_cap		= EDAC_FLAG_SECDED;  in dmc520_edac_probe()
539 	mci->scrub_cap		= SCRUB_FLAG_HW_SRC;  in dmc520_edac_probe()
540 	mci->scrub_mode		= dmc520_get_scrub_type(pvt);  in dmc520_edac_probe()
541 	mci->ctl_name		= EDAC_CTL_NAME;  in dmc520_edac_probe()
542 	mci->dev_name		= dev_name(mci->pdev);  in dmc520_edac_probe()
543 	mci->mod_name		= EDAC_MOD_NAME;  in dmc520_edac_probe()
547 	pvt->mem_width_in_bytes = dmc520_get_memory_width(pvt);  in dmc520_edac_probe()
560 			ret = devm_request_irq(&pdev->dev, irq,  in dmc520_edac_probe()
562 					       dev_name(&pdev->dev), mci);  in dmc520_edac_probe()
595 			devm_free_irq(&pdev->dev, pvt->irqs[idx], mci);  in dmc520_edac_probe()
610 	pvt = mci->pvt_info;  in dmc520_edac_remove()
619 		if (pvt->irqs[idx] >= 0) {  in dmc520_edac_remove()
620 			irq_mask_all |= pvt->masks[idx];  in dmc520_edac_remove()
621 			devm_free_irq(&pdev->dev, pvt->irqs[idx], mci);  in dmc520_edac_remove()
625 	edac_mc_del_mc(&pdev->dev);  in dmc520_edac_remove()
630 	{ .compatible = "arm,dmc-520", },
651 MODULE_DESCRIPTION("DMC-520 ECC driver");