1 // SPDX-License-Identifier: GPL-2.0-only
3  * Qualcomm SMEM NAND flash partition parser
28  * struct smem_flash_pentry - SMEM Flash partition entry
29  * @name: Name of the partition
31  * @length: Length of the partition in blocks
32  * @attr: Flags for this partition
42  * struct smem_flash_ptable - SMEM Flash partition table
43  * @magic1: Partition table Magic 1
44  * @magic2: Partition table Magic 2
45  * @version: Partition table version
47  * @pentry: Flash partition entries belonging to this ptable
69 			&& mtd->type == MTD_NORFLASH) {  in parse_qcomsmem_part()
70 		pr_err("%s: SMEM partition parser is incompatible with 4K sectors\n",  in parse_qcomsmem_part()
71 				mtd->name);  in parse_qcomsmem_part()
72 		return -EINVAL;  in parse_qcomsmem_part()
75 	pr_debug("Parsing partition table info from SMEM\n");  in parse_qcomsmem_part()
78 		if (PTR_ERR(ptable) != -EPROBE_DEFER)  in parse_qcomsmem_part()
79 			pr_err("Error reading partition table header\n");  in parse_qcomsmem_part()
84 	if (le32_to_cpu(ptable->magic1) != SMEM_FLASH_PART_MAGIC1 ||  in parse_qcomsmem_part()
85 	    le32_to_cpu(ptable->magic2) != SMEM_FLASH_PART_MAGIC2) {  in parse_qcomsmem_part()
86 		pr_err("Partition table magic verification failed\n");  in parse_qcomsmem_part()
87 		return -EINVAL;  in parse_qcomsmem_part()
91 	tmpparts = le32_to_cpu(ptable->numparts);  in parse_qcomsmem_part()
93 		pr_err("Partition numbers exceed the max limit\n");  in parse_qcomsmem_part()
94 		return -EINVAL;  in parse_qcomsmem_part()
97 	/* Find out length of partition data based on table version */  in parse_qcomsmem_part()
98 	if (le32_to_cpu(ptable->version) <= SMEM_FLASH_PTABLE_V3) {  in parse_qcomsmem_part()
101 	} else if (le32_to_cpu(ptable->version) == SMEM_FLASH_PTABLE_V4) {  in parse_qcomsmem_part()
105 		pr_err("Unknown ptable version (%d)", le32_to_cpu(ptable->version));  in parse_qcomsmem_part()
106 		return -EINVAL;  in parse_qcomsmem_part()
110 	 * Now that the partition table header has been parsed, verified  in parse_qcomsmem_part()
111 	 * and the length of the partition table calculated, read the  in parse_qcomsmem_part()
112 	 * complete partition table  in parse_qcomsmem_part()
116 		pr_err("Error reading partition table\n");  in parse_qcomsmem_part()
121 		pentry = &ptable->pentry[i];  in parse_qcomsmem_part()
122 		if (pentry->name[0] != '\0')  in parse_qcomsmem_part()
128 		return -ENOMEM;  in parse_qcomsmem_part()
131 		pentry = &ptable->pentry[i];  in parse_qcomsmem_part()
132 		if (pentry->name[0] == '\0')  in parse_qcomsmem_part()
135 		name = kstrdup(pentry->name, GFP_KERNEL);  in parse_qcomsmem_part()
137 			ret = -ENOMEM;  in parse_qcomsmem_part()
146 		parts[j].offset = le32_to_cpu(pentry->offset) * mtd->erasesize;  in parse_qcomsmem_part()
147 		parts[j].mask_flags = pentry->attr;  in parse_qcomsmem_part()
148 		parts[j].size = le32_to_cpu(pentry->length) * mtd->erasesize;  in parse_qcomsmem_part()
150 			 i, pentry->name, le32_to_cpu(pentry->offset),  in parse_qcomsmem_part()
151 			 le32_to_cpu(pentry->length), pentry->attr);  in parse_qcomsmem_part()
155 	pr_debug("SMEM partition table found: ver: %d len: %d\n",  in parse_qcomsmem_part()
156 		 le32_to_cpu(ptable->version), tmpparts);  in parse_qcomsmem_part()
162 	while (--j >= 0)  in parse_qcomsmem_part()
182 	{ .compatible = "qcom,smem-part" },
197 MODULE_DESCRIPTION("Qualcomm SMEM NAND flash partition parser");