From: Lee Jones <lee.jones@linaro.org>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: lee.jones@linaro.org, kernel@stlinux.com,
computersforpeace@gmail.com, linux-mtd@lists.infradead.org,
dwmw2@infradead.org, angus.clark@st.com, pekon@ti.com
Subject: [RFC 25/47] mtd: nand: stm_nand_bch: bad block marking helpers
Date: Tue, 25 Mar 2014 08:19:42 +0000 [thread overview]
Message-ID: <1395735604-26706-26-git-send-email-lee.jones@linaro.org> (raw)
In-Reply-To: <1395735604-26706-1-git-send-email-lee.jones@linaro.org>
Bad Block Markers (BBMs) keep track of unusable/unsuitable memory
blocks which can prevent unnecessary data loss. These helpers aid in
reading and writing to/from the Bad Block Tables (BBTs) where the BBMs
are stored.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/nand/stm_nand_bch.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 5bcaabbc..e1c71be 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -495,6 +495,35 @@ static uint8_t bch_write_page(struct nandi_controller *nandi,
return status;
}
+/*
+ * Bad Block Tables/Bad Block Markers
+ */
+#define BBT_MARK_BAD_FACTORY 0x0
+#define BBT_MARK_BAD_WEAR 0x1
+#define BBT_MARK_GOOD 0x3
+
+static void bbt_set_block_mark(uint8_t *bbt, uint32_t block, uint8_t mark)
+{
+ unsigned int byte = block >> 2;
+ unsigned int shift = (block & 0x3) << 1;
+
+ bbt[byte] &= ~(0x3 << shift);
+ bbt[byte] |= ((mark & 0x3) << shift);
+}
+
+static uint8_t bbt_get_block_mark(uint8_t *bbt, uint32_t block)
+{
+ unsigned int byte = block >> 2;
+ unsigned int shift = (block & 0x3) << 1;
+
+ return (bbt[byte] >> shift) & 0x3;
+}
+
+static int bbt_is_block_bad(uint8_t *bbt, uint32_t block)
+{
+ return bbt_get_block_mark(bbt, block) == BBT_MARK_GOOD ? 0 : 1;
+}
+
/* Scan block for IBBT signature */
static int bch_find_ibbt_sig(struct nandi_controller *nandi,
uint32_t block, int *bak, uint8_t *vers,
--
1.8.3.2
next prev parent reply other threads:[~2014-03-25 8:46 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-25 8:19 [RFC 00/47] mtd: nand: Add new driver supporting ST's BCH h/w Lee Jones
2014-03-25 8:19 ` [RFC 01/47] mtd: nand: export useful functions from core driver Lee Jones
2014-03-25 12:57 ` Ezequiel Garcia
2014-03-25 14:58 ` Lee Jones
2014-03-25 8:19 ` [RFC 02/47] mtd: nand: add ONFI NAND Timing Mode Specifications Lee Jones
2014-03-25 17:01 ` Jason Gunthorpe
2014-03-25 8:19 ` [RFC 03/47] mtd: nand: add shared register defines for ST's NAND Controller drivers Lee Jones
2014-03-25 8:19 ` [RFC 04/47] mtd: nand: adding ST's BCH NAND Controller driver Lee Jones
2014-03-25 8:19 ` [RFC 05/47] mtd: nand: stm_nand_bch: IRQ support for " Lee Jones
2014-03-26 7:10 ` Gupta, Pekon
2014-03-25 8:19 ` [RFC 06/47] mtd: nand: stm_nand_bch: change between BCH and Hamming modes Lee Jones
2014-03-25 8:19 ` [RFC 07/47] mtd: nand: stm_nand_bch: initialise the BCH Controller Lee Jones
2014-03-26 10:25 ` Gupta, Pekon
2014-04-30 10:22 ` Lee Jones
2014-04-30 10:59 ` Gupta, Pekon
2014-04-30 12:29 ` Lee Jones
2014-03-25 8:19 ` [RFC 08/47] mtd: nand: stm_nand_bch: supply clock support Lee Jones
2014-03-26 7:15 ` Gupta, Pekon
2014-03-25 8:19 ` [RFC 09/47] mtd: nand: stm_nand_bch: introduce and initialise some important data structures Lee Jones
2014-03-25 8:19 ` [RFC 10/47] mtd: nand: stm_nand_bch: initialise the Hamming Controller Lee Jones
2014-03-25 8:19 ` [RFC 11/47] mtd: nand: stm_nand_bch: add Power Management Lee Jones
2014-03-25 8:19 ` [RFC 12/47] mtd: nand: stm_nand_bch: scan for NAND devices Lee Jones
2014-03-25 8:19 ` [RFC 13/47] mtd: nand: stm_nand_bch: provide Device Tree support Lee Jones
2014-03-26 9:18 ` Gupta, Pekon
2014-04-30 12:54 ` Lee Jones
2014-05-05 6:55 ` Gupta, Pekon
2014-05-09 10:03 ` Lee Jones
2014-05-09 10:32 ` Gupta, Pekon
2014-05-09 10:38 ` Lee Jones
2014-05-19 14:02 ` Lee Jones
2014-03-25 8:19 ` [RFC 14/47] mtd: nand: stm_nand_bch: configure BCH and FLEX by ONFI timing mode Lee Jones
2014-03-25 8:19 ` [RFC 15/47] mtd: nand: stm_nand_bch: add compatible page size check Lee Jones
2014-03-25 8:19 ` [RFC 16/47] mtd: nand: stm_nand_bch: derive some working variables for latter use Lee Jones
2014-03-25 8:19 ` [RFC 17/47] mtd: nand: stm_nand_bch: automatically set EEC mode if requested Lee Jones
2014-03-25 8:19 ` [RFC 18/47] mtd: nand: stm_nand_bch: ensure configuration is compatible with this driver Lee Jones
2014-03-25 8:19 ` [RFC 19/47] mtd: nand: stm_nand_bch: configure BCH read/write/erase programs Lee Jones
2014-03-25 8:19 ` [RFC 20/47] mtd: nand: stm_nand_bch: initialise working buffers Lee Jones
2014-03-25 8:19 ` [RFC 21/47] mtd: nand: stm_nand_bch: provide shared BCH operations Lee Jones
2014-03-25 8:19 ` [RFC 22/47] mtd: nand: stm_nand_bch: check erased page for zeros Lee Jones
2014-03-25 8:19 ` [RFC 23/47] mtd: nand: stm_nand_bch: read and write page (BCH) Lee Jones
2014-03-26 10:17 ` Gupta, Pekon
2014-04-30 11:19 ` Lee Jones
2014-03-25 8:19 ` [RFC 24/47] mtd: nand: stm_nand_bch: find IBBT signature Lee Jones
2014-03-25 8:19 ` Lee Jones [this message]
2014-03-25 8:19 ` [RFC 26/47] mtd: nand: stm_nand_bch: populate IBBT BCH Header Lee Jones
2014-03-25 8:19 ` [RFC 27/47] mtd: nand: stm_nand_bch: write IBBT to Flash Lee Jones
2014-03-25 8:19 ` [RFC 28/47] mtd: nand: stm_nand_bch: update flash-resident BBT(s) Lee Jones
2014-03-25 8:19 ` [RFC 29/47] mtd: nand: stm_nand_bch: add Hamming-FLEX operations Lee Jones
2014-03-25 8:19 ` [RFC 30/47] mtd: nand: stm_nand_bch: read and write raw (FLEX) Lee Jones
2014-03-25 8:19 ` [RFC 31/47] mtd: nand: stm_nand_bch: scan block for BBM(s) according to specified BBT options Lee Jones
2014-03-25 8:19 ` [RFC 32/47] mtd: nand: stm_nand_bch: scan for BBMs and build memory-resident BBT Lee Jones
2014-03-25 8:19 ` [RFC 33/47] mtd: nand: stm_nand_bch: search for and load flash-resident BBT Lee Jones
2014-03-25 8:19 ` [RFC 34/47] mtd: nand: stm_nand_bch: " Lee Jones
2014-03-25 8:19 ` [RFC 35/47] mtd: nand: stm_nand_bch: dump bad blocks Lee Jones
2014-03-25 12:53 ` Ezequiel Garcia
2014-03-25 8:19 ` [RFC 36/47] mtd: nand: stm_nand_bch: parse partitions and register an MTD device Lee Jones
2014-03-25 8:19 ` [RFC 37/47] mtd: nand: stm_nand_bch: fetch the bit-flips threshold Lee Jones
2014-03-25 8:19 ` [RFC 38/47] mtd: nand: stm_nand_bch: check WP (FLEX) Lee Jones
2014-03-25 8:19 ` [RFC 39/47] mtd: nand: stm_nand_bch: read and write ops (FLEX) Lee Jones
2014-03-25 8:19 ` [RFC 40/47] mtd: nand: stm_nand_bch: MTD erase (BCH) Lee Jones
2014-03-25 8:19 ` [RFC 41/47] mtd: nand: stm_nand_bch: MTD mark and check for bad blocks (BCH) Lee Jones
2014-03-25 8:19 ` [RFC 42/47] mtd: nand: stm_nand_bch: add read and write OOB (BCH) Lee Jones
2014-03-25 8:20 ` [RFC 43/47] mtd: nand: stm_nand_bch: read and write functions (BCH) Lee Jones
2014-03-26 10:31 ` Gupta, Pekon
2014-04-30 9:19 ` Lee Jones
2014-03-25 8:20 ` [RFC 44/47] mtd: nand: stm_nand_bch: MTD read and write (BCH) Lee Jones
2014-03-25 8:20 ` [RFC 45/47] mtd: nand: stm_nand_bch: read and write buffers (FLEX) Lee Jones
2014-03-25 8:20 ` [RFC 46/47] mtd: nand: mtd_nand_bch: add remaining FLEX functions Lee Jones
2014-03-25 8:20 ` [RFC 47/47] mtd: nand: stm_nand_bch: catch unsupported calls Lee Jones
2014-03-25 12:50 ` [RFC 00/47] mtd: nand: Add new driver supporting ST's BCH h/w Ezequiel Garcia
2014-03-25 13:11 ` Lee Jones
2014-03-25 22:00 ` Ezequiel Garcia
2014-03-26 7:28 ` Brian Norris
2014-03-27 10:28 ` Lee Jones
2014-04-01 11:29 ` Lee Jones
2014-04-10 20:00 ` Brian Norris
2014-04-30 9:57 ` Lee Jones
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