summaryrefslogtreecommitdiff
path: root/include/linux/mtd
diff options
context:
space:
mode:
authorMiquel Raynal <miquel.raynal@bootlin.com>2020-09-30 01:01:23 +0200
committerMiquel Raynal <miquel.raynal@bootlin.com>2020-12-10 22:37:30 +0100
commit35fe1b98a0082ad3f576bcc420c74dab435da307 (patch)
tree22c6e65e7dd7d2e830dfdabc93f55b2825d49223 /include/linux/mtd
parent5180a62c12497aa491a7c79c062a9e3a884c9762 (diff)
mtd: nand: ecc-hamming: Create the software Hamming engine
Let's continue introducing the generic ECC engine abstraction in the NAND subsystem by instantiating a second ECC engine: software Hamming. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-20-miquel.raynal@bootlin.com
Diffstat (limited to 'include/linux/mtd')
-rw-r--r--include/linux/mtd/nand-ecc-sw-hamming.h16
-rw-r--r--include/linux/mtd/nand.h9
2 files changed, 21 insertions, 4 deletions
diff --git a/include/linux/mtd/nand-ecc-sw-hamming.h b/include/linux/mtd/nand-ecc-sw-hamming.h
index 5a39e96c3546..9f9073d86ff3 100644
--- a/include/linux/mtd/nand-ecc-sw-hamming.h
+++ b/include/linux/mtd/nand-ecc-sw-hamming.h
@@ -14,8 +14,8 @@
/**
* struct nand_ecc_sw_hamming_conf - private software Hamming ECC engine structure
- * @reqooblen: Save the actual user OOB length requested before overwriting it
- * @spare_oobbuf: Spare OOB buffer if none is provided
+ * @req_ctx: Save request context and tweak the original request to fit the
+ * engine needs
* @code_size: Number of bytes needed to store a code (one code per step)
* @nsteps: Number of steps
* @calc_buf: Buffer to use when calculating ECC bytes
@@ -23,8 +23,7 @@
* @sm_order: Smart Media special ordering
*/
struct nand_ecc_sw_hamming_conf {
- unsigned int reqooblen;
- void *spare_oobbuf;
+ struct nand_ecc_req_tweak_ctx req_ctx;
unsigned int code_size;
unsigned int nsteps;
u8 *calc_buf;
@@ -34,6 +33,8 @@ struct nand_ecc_sw_hamming_conf {
#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING)
+int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand);
+void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand);
int ecc_sw_hamming_calculate(const unsigned char *buf, unsigned int step_size,
unsigned char *code, bool sm_order);
int nand_ecc_sw_hamming_calculate(struct nand_device *nand,
@@ -48,6 +49,13 @@ int nand_ecc_sw_hamming_correct(struct nand_device *nand, unsigned char *buf,
#else /* !CONFIG_MTD_NAND_ECC_SW_HAMMING */
+static inline int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand)
+{
+ return -ENOTSUPP;
+}
+
+static inline void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand) {}
+
static inline int ecc_sw_hamming_calculate(const unsigned char *buf,
unsigned int step_size,
unsigned char *code, bool sm_order)
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index df8548187713..3616fa27eaa1 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -278,6 +278,15 @@ int nand_ecc_finish_io_req(struct nand_device *nand,
struct nand_page_io_req *req);
bool nand_ecc_is_strong_enough(struct nand_device *nand);
+#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING)
+struct nand_ecc_engine *nand_ecc_sw_hamming_get_engine(void);
+#else
+static inline struct nand_ecc_engine *nand_ecc_sw_hamming_get_engine(void)
+{
+ return NULL;
+}
+#endif /* CONFIG_MTD_NAND_ECC_SW_HAMMING */
+
#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH)
struct nand_ecc_engine *nand_ecc_sw_bch_get_engine(void);
#else