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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-12-15 13:32:05 +0100 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-12-22 12:38:46 +0100 |
| commit | bbcd80f53a5e8c27c2511f539fec8c373f500cf4 (patch) | |
| tree | fa2a8a82d0eb77a13c54e37c2845301f0e04d9cc /include/linux/mtd | |
| parent | a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6 (diff) | |
| download | linux-bbcd80f53a5e8c27c2511f539fec8c373f500cf4.tar.gz linux-bbcd80f53a5e8c27c2511f539fec8c373f500cf4.tar.bz2 linux-bbcd80f53a5e8c27c2511f539fec8c373f500cf4.zip | |
mtd: rawnand: Prevent crossing LUN boundaries during sequential reads
The ONFI specification states that devices do not need to support
sequential reads across LUN boundaries. In order to prevent such event
from happening and possibly failing, let's introduce the concept of
"pause" in the sequential read to handle these cases. The first/last
pages remain the same but any time we cross a LUN boundary we will end
and restart (if relevant) the sequential read operation.
Cc: stable@vger.kernel.org
Fixes: 003fe4b9545b ("mtd: rawnand: Support for sequential cache reads")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Martin Hundebøll <martin@geanix.com>
Link: https://lore.kernel.org/linux-mtd/20231215123208.516590-2-miquel.raynal@bootlin.com
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/rawnand.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index c29ace15a053..9d0fc5109af6 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1265,6 +1265,7 @@ struct nand_secure_region { * @cont_read: Sequential page read internals * @cont_read.ongoing: Whether a continuous read is ongoing or not * @cont_read.first_page: Start of the continuous read operation + * @cont_read.pause_page: End of the current sequential cache read operation * @cont_read.last_page: End of the continuous read operation * @controller: The hardware controller structure which is shared among multiple * independent devices @@ -1321,6 +1322,7 @@ struct nand_chip { struct { bool ongoing; unsigned int first_page; + unsigned int pause_page; unsigned int last_page; } cont_read; |