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Date: Wed, 21 Nov 2018 01:43:07 +0800
From: kbuild test robot <lkp@...el.com>
To: Tudor.Ambarus@...rochip.com
Cc: kbuild-all@...org, marek.vasut@...il.com, dwmw2@...radead.org,
computersforpeace@...il.com, boris.brezillon@...tlin.com,
richard@....at, Cyrille.Pitchen@...rochip.com,
linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
Tudor.Ambarus@...rochip.com
Subject: Re: [PATCH] mtd: spi-nor: parse SFDP 4-byte Address Instruction Table
Hi Cyrille,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on mtd/spi-nor/next]
[also build test ERROR on v4.20-rc3 next-20181120]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Tudor-Ambarus-microchip-com/mtd-spi-nor-parse-SFDP-4-byte-Address-Instruction-Table/20181120-223821
base: git://git.infradead.org/linux-mtd.git spi-nor/next
config: nds32-allyesconfig (attached as .config)
compiler: nds32le-linux-gcc (GCC) 6.4.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=6.4.0 make.cross ARCH=nds32
All errors (new ones prefixed by >>):
drivers/mtd//spi-nor/spi-nor.c: In function 'spi_nor_parse_4bait':
>> drivers/mtd//spi-nor/spi-nor.c:3165:15: error: implicit declaration of function 'spi_nor_sort_erase_mask' [-Werror=implicit-function-declaration]
erase_mask = spi_nor_sort_erase_mask(map, erase_mask);
^~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/spi_nor_sort_erase_mask +3165 drivers/mtd//spi-nor/spi-nor.c
3053
3054 /**
3055 * spi_nor_parse_4bait() - parse the 4-Byte Address Instruction Table
3056 * @nor: pointer to a 'struct spi_nor'.
3057 * @param_header: pointer to the 'struct sfdp_parameter_header' describing
3058 * the 4-Byte Address Instruction Table length and version.
3059 * @params: pointer to the 'struct spi_nor_flash_parameter' to be.
3060 *
3061 * Return: 0 on success, -errno otherwise.
3062 */
3063 static int spi_nor_parse_4bait(struct spi_nor *nor,
3064 const struct sfdp_parameter_header *param_header,
3065 struct spi_nor_flash_parameter *params)
3066 {
3067 static const struct sfdp_4bait reads[] = {
3068 { SNOR_HWCAPS_READ, BIT(0) },
3069 { SNOR_HWCAPS_READ_FAST, BIT(1) },
3070 { SNOR_HWCAPS_READ_1_1_2, BIT(2) },
3071 { SNOR_HWCAPS_READ_1_2_2, BIT(3) },
3072 { SNOR_HWCAPS_READ_1_1_4, BIT(4) },
3073 { SNOR_HWCAPS_READ_1_4_4, BIT(5) },
3074 { SNOR_HWCAPS_READ_1_1_1_DTR, BIT(13) },
3075 { SNOR_HWCAPS_READ_1_2_2_DTR, BIT(14) },
3076 { SNOR_HWCAPS_READ_1_4_4_DTR, BIT(15) },
3077 };
3078 static const struct sfdp_4bait programs[] = {
3079 { SNOR_HWCAPS_PP, BIT(6) },
3080 { SNOR_HWCAPS_PP_1_1_4, BIT(7) },
3081 { SNOR_HWCAPS_PP_1_4_4, BIT(8) },
3082 };
3083 static const struct sfdp_4bait erases[SNOR_ERASE_TYPE_MAX] = {
3084 { 0u /* not used */, BIT(9) },
3085 { 0u /* not used */, BIT(10) },
3086 { 0u /* not used */, BIT(11) },
3087 { 0u /* not used */, BIT(12) },
3088 };
3089 struct spi_nor_pp_command *params_pp = params->page_programs;
3090 struct spi_nor_erase_map *map = &nor->erase_map;
3091 struct spi_nor_erase_type *erase_type = map->erase_type;
3092 u32 *dwords;
3093 size_t len;
3094 u32 addr, discard_hwcaps, read_hwcaps, pp_hwcaps, erase_mask;
3095 int i, ret;
3096
3097 if (param_header->major != SFDP_JESD216_MAJOR ||
3098 param_header->length < SFDP_4BAIT_DWORD_MAX)
3099 return -EINVAL;
3100
3101 /* Read the 4-byte Address Instruction Table. */
3102 len = sizeof(*dwords) * SFDP_4BAIT_DWORD_MAX;
3103
3104 /* Use a kmalloc'ed bounce buffer to guarantee it is DMA-able. */
3105 dwords = kmalloc(len, GFP_KERNEL);
3106 if (!dwords)
3107 return -ENOMEM;
3108
3109 addr = SFDP_PARAM_HEADER_PTP(param_header);
3110 ret = spi_nor_read_sfdp(nor, addr, len, dwords);
3111 if (ret)
3112 return ret;
3113
3114 /* Fix endianness of the 4BAIT DWORDs. */
3115 for (i = 0; i < SFDP_4BAIT_DWORD_MAX; i++)
3116 dwords[i] = le32_to_cpu(dwords[i]);
3117
3118 /*
3119 * Compute the subset of (Fast) Read commands for which the 4-byte
3120 * version is supported.
3121 */
3122 discard_hwcaps = 0;
3123 read_hwcaps = 0;
3124 for (i = 0; i < ARRAY_SIZE(reads); i++) {
3125 const struct sfdp_4bait *read = &reads[i];
3126
3127 discard_hwcaps |= read->hwcaps;
3128 if ((params->hwcaps.mask & read->hwcaps) &&
3129 (dwords[0] & read->supported_bit))
3130 read_hwcaps |= read->hwcaps;
3131 }
3132
3133 /*
3134 * Compute the subset of Page Program commands for which the 4-byte
3135 * version is supported.
3136 */
3137 pp_hwcaps = 0;
3138 for (i = 0; i < ARRAY_SIZE(programs); i++) {
3139 const struct sfdp_4bait *program = &programs[i];
3140
3141 /*
3142 * The 4 Byte Address Instruction (Optional) Table is the only
3143 * SFDP table that indicates support for Page Program Commands.
3144 * Bypass the params->hwcaps.mask and consider 4BAIT the biggest
3145 * authority for specifying Page Program support.
3146 */
3147 discard_hwcaps |= program->hwcaps;
3148 if (dwords[0] & program->supported_bit)
3149 pp_hwcaps |= program->hwcaps;
3150 }
3151
3152 /*
3153 * Compute the subset of Sector Erase commands for which the 4-byte
3154 * version is supported.
3155 */
3156 erase_mask = 0;
3157 for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
3158 const struct sfdp_4bait *erase = &erases[i];
3159
3160 if (dwords[0] & erase->supported_bit)
3161 erase_mask |= BIT(i);
3162 }
3163
3164 /* Replicate the sort done for the map's erase types in BFPT. */
> 3165 erase_mask = spi_nor_sort_erase_mask(map, erase_mask);
3166
3167 /*
3168 * We need at least one 4-byte op code per read, program and erase
3169 * operation; the .read(), .write() and .erase() hooks share the
3170 * nor->addr_width value.
3171 */
3172 if (!read_hwcaps || !pp_hwcaps || !erase_mask)
3173 goto out;
3174
3175 /*
3176 * Discard all operations from the 4-byte instruction set which are
3177 * not supported by this memory.
3178 */
3179 params->hwcaps.mask &= ~discard_hwcaps;
3180 params->hwcaps.mask |= (read_hwcaps | pp_hwcaps);
3181
3182 /* Use the 4-byte address instruction set. */
3183 for (i = 0; i < SNOR_CMD_READ_MAX; i++) {
3184 struct spi_nor_read_command *read_cmd = ¶ms->reads[i];
3185
3186 read_cmd->opcode = spi_nor_convert_3to4_read(read_cmd->opcode);
3187 }
3188
3189 /* 4BAIT is the only SFDP table that indicates page program support. */
3190 if (pp_hwcaps & SNOR_HWCAPS_PP)
3191 spi_nor_set_pp_settings(¶ms_pp[SNOR_CMD_PP],
3192 SPINOR_OP_PP_4B, SNOR_PROTO_1_1_1);
3193 if (pp_hwcaps & SNOR_HWCAPS_PP_1_1_4)
3194 spi_nor_set_pp_settings(¶ms_pp[SNOR_CMD_PP_1_1_4],
3195 SPINOR_OP_PP_1_1_4_4B,
3196 SNOR_PROTO_1_1_4);
3197 if (pp_hwcaps & SNOR_HWCAPS_PP_1_4_4)
3198 spi_nor_set_pp_settings(¶ms_pp[SNOR_CMD_PP_1_4_4],
3199 SPINOR_OP_PP_1_4_4_4B,
3200 SNOR_PROTO_1_4_4);
3201
3202 for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
3203 if (erase_mask & BIT(i))
3204 erase_type[i].opcode = (dwords[1] >>
3205 erase_type[i].idx * 8) & 0xFF;
3206 else
3207 spi_nor_set_erase_type(&erase_type[i], 0u, 0xFF);
3208 }
3209
3210 /*
3211 * We set nor->addr_width here to skip spi_nor_set_4byte_opcodes()
3212 * later because this latest function implements a legacy quirk for
3213 * the erase size of Spansion memory. However this quirk is no longer
3214 * needed with new SFDP compliant memories.
3215 */
3216 nor->addr_width = 4;
3217 nor->flags |= SPI_NOR_4B_OPCODES;
3218
3219 /* fall through */
3220 out:
3221 kfree(dwords);
3222 return ret;
3223 }
3224
---
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