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Groups > linux.kernel > #1286036

[PATCH 11/23] mtd: add mtd_eccpos(), mtd_oobfree() and mtd_eccbytes() helper functions

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In order to make the ecclayout definition completely dynamic we need to
rework the way these different ECC layouts are defined and iterated.

Create the mtd_eccpos(), mtd_oobfree() and mtd_eccbytes() helpers to hide
ecclayout definition internals to their users.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
 include/linux/mtd/mtd.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 9cf13c4..25e3d0f 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -253,6 +253,38 @@ struct mtd_info {
 	int usecount;
 };
 
+static inline int mtd_eccpos(struct mtd_info *mtd, int eccbyte)
+{
+	if (!mtd->ecclayout)
+		return -ENOTSUPP;
+
+	if (eccbyte >= mtd->ecclayout->eccbytes)
+		return -ERANGE;
+
+	return mtd->ecclayout->eccpos[eccbyte];
+}
+
+static inline int mtd_oobfree(struct mtd_info *mtd, int section,
+			      struct nand_oobfree *oobfree)
+{
+	memset(oobfree, 0, sizeof(*oobfree));
+
+	if (!mtd->ecclayout)
+		return -ENOTSUPP;
+
+	if (section >= MTD_MAX_OOBFREE_ENTRIES_LARGE)
+		return -ERANGE;
+
+	*oobfree = mtd->ecclayout->oobfree[section];
+
+	return 0;
+}
+
+static inline int mtd_eccbytes(struct mtd_info *mtd)
+{
+	return mtd->ecclayout ? mtd->ecclayout->eccbytes : 0;
+}
+
 static inline void mtd_set_of_node(struct mtd_info *mtd,
 				   struct device_node *np)
 {
-- 
2.1.4

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Thread

[PATCH 00/23] mtd: rework ECC layout definition Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 15/23] mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 21/23] staging: mt29f_spinand: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
    Re: [linux-sunxi] [PATCH 21/23] staging: mt29f_spinand: switch to mtd_ooblayout_ops Julian Calaby <julian.calaby@gmail.com> - 2015-12-08 01:10 +0100
      Re: [linux-sunxi] [PATCH 21/23] staging: mt29f_spinand: switch to  mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-08 09:50 +0100
  [PATCH 03/23] mtd: nftl: kill unused oobinfo field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 20/23] mtd: onenand: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 01/23] mtd: kill the ecclayout->oobavail field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
    Re: [linux-sunxi] [PATCH 01/23] mtd: kill the ecclayout->oobavail  field Priit Laes <plaes@plaes.org> - 2015-12-08 07:50 +0100
      Re: [linux-sunxi] [PATCH 01/23] mtd: kill the ecclayout->oobavail  field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-08 09:20 +0100
  [PATCH 23/23] mtd: kill the nand_ecclayout struct Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 12/23] mtd: use mtd_eccpos() and mtd_oobfree() where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
    Re: [PATCH 12/23] mtd: use mtd_eccpos() and mtd_oobfree() where  appropriate kbuild test robot <lkp@intel.com> - 2015-12-08 00:40 +0100
  [PATCH 11/23] mtd: add mtd_eccpos(), mtd_oobfree() and mtd_eccbytes() helper functions Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 22/23] mtd: nand: kill layout field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 18/23] mtd: nand: bch: switch to nand_ecclayout_pos Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 07/23] staging: mt29f_spinand: kill unused ecclayout field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
  [PATCH 09/23] mtd: nand: vf610: remove useless mtd->ecclayout assignment Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:30 +0100
    Re: [PATCH 09/23] mtd: nand: vf610: remove useless mtd->ecclayout  assignment Stefan Agner <stefan@agner.ch> - 2015-12-07 23:50 +0100
  [PATCH 10/23] mtd: nand: simplify nand_bch_init() usage Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  [PATCH 17/23] mtd: nand: implement the default mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  [PATCH 06/23] mtd: nand: kill unused ->ecclayout field in platform_nand_chip struct Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  [PATCH 08/23] mtd: nand: lpc32xx_mlc: fix ecc.size Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  [PATCH 05/23] mtd: nand: jz4770: kill the ->ecc_layout field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
    Re: [PATCH 05/23] mtd: nand: jz4770: kill the ->ecc_layout field Harvey Hunt <harvey.hunt@imgtec.com> - 2015-12-08 11:40 +0100
      Re: [PATCH 05/23] mtd: nand: jz4770: kill the ->ecc_layout field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-08 11:40 +0100
  [PATCH 04/23] mtd: nand: s3c2410: kill the ->ecc_layout field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
    Re: [PATCH 04/23] mtd: nand: s3c2410: kill the ->ecc_layout field Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2015-12-08 01:40 +0100
  [PATCH 13/23] mtd: add mtd_set_ecclayout() helper function Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  [PATCH 02/23] mtd: inftl: kill unused oobinfo field Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  [PATCH 16/23] mtd: docg3: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  [PATCH 14/23] mtd: use mtd_set_ecclayout() where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-07 23:40 +0100
  Re: [PATCH 19/23] mtd: nand: switch all drivers to mtd_ooblayout_ops Ralf Baechle <ralf@linux-mips.org> - 2015-12-08 11:20 +0100

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