Both the JEDEC and ONFI specification say that read cache sequential
support is an optional command. This means that we not only need to
check whether the individual controller supports the command, we also
need to check the parameter pages for both ONFI and JEDEC NAND flashes
before enabling sequential cache reads.
This fixes support for NAND flashes which don't support enabling cache
reads, i.e. Samsung K9F4G08U0F or Toshiba TC58NVG0S3HTA00.
Sequential cache reads are now only available for ONFI and JEDEC
devices, if individual vendors implement this, it needs to be enabled
per vendor.
Tested on i.MX6Q with a Samsung NAND flash chip that doesn't support
sequential reads.
Fixes: 003fe4b954 ("mtd: rawnand: Support for sequential cache reads")
Cc: stable@vger.kernel.org
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230922141717.35977-1-r.czerwinski@pengutronix.de
Raw NAND core changes:
* Fix -Wvoid-pointer-to-enum-cast warning
* Export 'nand_exit_status_op()'
* dt-bindings: Fix nand-controller.yaml license
Raw NAND controller driver changes:
* Omap, Omap2, Samsung, Atmel, fsl_upm, lpc32xx_slc, lpc32xx_mlc, STM32_FMC2,
sh_ftlctl, MXC, Sunxi:
- Use devm_platform_get_and_ioremap_resource()
* Orion, vf610_nfc, Sunxi, STM32_FMC2, MTK, mpc5121, lpc32xx_slc, Intel,
FSMC, Arasan:
- Use helper function devm_clk_get_optional_enabled()
* Brcmnand:
- Use devm_platform_ioremap_resource_byname()
- Propagate init error -EPROBE_DEFER up
- Propagate error and simplify ternary operators
- Fix mtd oobsize
- Fix potential out-of-bounds access in oob write
- Fix crash during the panic_write
- Fix potential false time out warning
- Fix ECC level field setting for v7.2 controller
* fsmc: Handle clk prepare error in fsmc_nand_resume()
* Marvell: Add support for AC5 SoC
* Meson:
- Support for 512B ECC step size
- Fix build error
- Use NAND core API to check status
- dt-bindings:
* Make ECC properties dependent
* Support for 512B ECC step size
* Drop unneeded quotes
* Oxnas: Remove driver and bindings
* Qcom:
- Conversion to ->exec_op()
- Removal of the legacy interface
- Two full series of improvements/misc fixes
* Use the BIT() macro
* Use u8 instead of uint8_t
* Fix alignment with open parenthesis
* Fix the spacing
* Fix wrong indentation
* Fix a typo
* Early structure initialization
* Fix address parsing within ->exec_op()
* Remove superfluous initialization of "ret"
* Rename variables in qcom_op_cmd_mapping()
* Handle unsupported opcode in qcom_op_cmd_mapping()
* Fix the opcode check in qcom_check_op()
* Use EOPNOTSUPP instead of ENOTSUPP
* Wrap qcom_nand_exec_op() to 80 columns
* Unmap sg_list and free desc within submic_descs()
* Simplify the call to nand_prog_page_end_op()
* Do not override the error no of submit_descs()
* Sort includes alphabetically
* Clear buf_count and buf_start in raw read
* Add read/read_start ops in exec_op path
* vf610_nfc: Do not check 0 for platform_get_irq()
SPI-NAND changes:
* gigadevice: Add support for GD5F1GQ{4,5}RExxH
* esmt: Add support for F50D2G41KA
* toshiba: Add support for T{C,H}58NYG{0,2}S3HBAI4 and TH58NYG3S0HBAI6
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Raw NAND core changes:
* Convert to platform remove callback returning void
* Fix spelling mistake waifunc() -> waitfunc()
Raw NAND controller driver changes:
* imx: Remove unused is_imx51_nfc and imx53_nfc functions
* omap2: Drop obsolete dependency on COMPILE_TEST
* orion: Use devm_platform_ioremap_resource()
* qcom:
- Use of_property_present() for testing DT property presence
- Use devm_platform_get_and_ioremap_resource()
* stm32_fmc2: Depends on ARCH_STM32 instead of MACH_STM32MP157
* tmio: Remove reference to config MTD_NAND_TMIO in the parsers
Raw NAND manufacturer driver changes:
* hynix: Fix up bit 0 of sdr_timing_mode
SPI-NAND changes:
* Add support for ESMT F50x1G41LB
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Some SPI NOR controllers that used this method were moved to
drivers/spi/. We don't accept new support for the existing SPI NOR
controllers drivers under drivers/mtd/spi-nor/controllers/ and we
encourage their owners to move the drivers under drivers/spi/.
Make spi_nor_restore() private as we're going to use it just in core.c.
Link: https://lore.kernel.org/r/20230331074606.3559258-8-tudor.ambarus@linaro.org
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
On devices featuring several banks, the Read While Write (RWW) feature
is here to improve the overall performance when performing parallel
reads and writes at different locations (different banks). The following
constraints have to be taken into account:
1#: A single operation can be performed in a given bank.
2#: Only a single program or erase operation can happen on the entire
chip (common hardware limitation to limit costs)
3#: Reads must remain serialized even though reads crossing bank
boundaries are allowed.
4#: The I/O bus is unique and thus is the most constrained resource, all
spi-nor operations requiring access to the spi bus (through the spi
controller) must be serialized until the bus exchanges are over. So
we must ensure a single operation can be "sent" at a time.
5#: Any other operation that would not be either a read or a write or an
erase is considered requiring access to the full chip and cannot be
parallelized, we then need to ensure the full chip is in the idle
state when this occurs.
All these constraints can easily be managed with a proper locking model:
1#: Is enforced by a bitfield of the in-use banks, so that only a single
operation can happen in a specific bank at any time.
2#: Is handled by the ongoing_pe boolean which is set before any write
or erase, and is released only at the very end of the
operation. This way, no other destructive operation on the chip can
start during this time frame.
3#: An ongoing_rd boolean allows to track the ongoing reads, so that
only one can be performed at a time.
4#: An ongoing_io boolean is introduced in order to capture and serialize
bus accessed. This is the one being released "sooner" than before,
because we only need to protect the chip against other SPI accesses
during the I/O phase, which for the destructive operations is the
beginning of the operation (when we send the command cycles and
possibly the data), while the second part of the operation (the
erase delay or the programmation delay) is when we can do something
else in another bank.
5#: Is handled by the three booleans presented above, if any of them is
set, the chip is not yet ready for the operation and must wait.
All these internal variables are protected by the existing lock, so that
changes in this structure are atomic. The serialization is handled with
a wait queue.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230328154105.448540-8-miquel.raynal@bootlin.com
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Pull jffs2, ubi and ubifs updates from Richard Weinberger:
"JFFS2:
- Fix memory corruption in error path
- Spelling and coding style fixes
UBI:
- Switch to BLK_MQ_F_BLOCKING in ubiblock
- Wire up partent device (for sysfs)
- Multiple UAF bugfixes
- Fix for an infinite loop in WL error path
UBIFS:
- Fix for multiple memory leaks in error paths
- Fixes for wrong space accounting
- Minor cleanups
- Spelling and coding style fixes"
* tag 'ubifs-for-linus-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: (36 commits)
ubi: block: Fix a possible use-after-free bug in ubiblock_create()
ubifs: make kobj_type structures constant
mtd: ubi: block: wire-up device parent
mtd: ubi: wire-up parent MTD device
ubi: use correct names in function kernel-doc comments
ubi: block: set BLK_MQ_F_BLOCKING
jffs2: Fix list_del corruption if compressors initialized failed
jffs2: Use function instead of macro when initialize compressors
jffs2: fix spelling mistake "neccecary"->"necessary"
ubifs: Fix kernel-doc
ubifs: Fix some kernel-doc comments
UBI: Fastmap: Fix kernel-doc
ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed
ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()
ubi: fastmap: Fix missed fm_anchor PEB in wear-leveling after disabling fastmap
ubifs: ubifs_releasepage: Remove ubifs_assert(0) to valid this process
ubifs: ubifs_writepage: Mark page dirty after writing inode failed
ubifs: dirty_cow_znode: Fix memleak in error handling path
ubifs: Re-statistic cleaned znode count if commit failed
ubi: Fix permission display of the debugfs files
...
NAND core changes:
* Check the data only read pattern only once
* Prepare the late addition of supported operation checks
* Support for sequential cache reads
* Fix nand_chip kdoc
Raw NAND changes:
* Fsl_elbc: Propagate HW ECC settings to HW
* Marvell: Add missing layouts
* Pasemi: Don't use static data to track per-device state
* Sunxi:
- Fix the size of the last OOB region
- Remove an unnecessary check
- Remove an unnecessary check
- Clean up chips after failed init
- Precompute the ECC_CTL register value
- Embed sunxi_nand_hw_ecc by value
- Update OOB layout to match hardware
* tmio_nand: Remove driver
* vf610_nfc: Use regular comments for functions
SPI-NAND changes:
* Add support for AllianceMemory AS5F34G04SND
* Macronix: use scratch buffer for DMA operation
NAND ECC changes:
* Mediatek:
- Add ECC support fot MT7986 IC
- Add compatible for MT7986
- dt-bindings: Split ECC engine with rawnand controller
ubiblock devices were previously only identifyable by their name, but
not connected to their parent UBI volume device e.g. in sysfs.
Properly parent ubiblock device as descendant of a UBI volume device
to reflect device model hierachy.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Add support for sequential cache reads for controllers using the generic
core helpers for their fast read/write helpers.
Sequential reads may reduce the overhead when accessing physically
continuous data by loading in cache the next page while the previous
page gets sent out on the NAND bus.
The ONFI specification provides the following additional commands to
handle sequential cached reads:
* 0x31 - READ CACHE SEQUENTIAL:
Requires the NAND chip to load the next page into cache while keeping
the current cache available for host reads.
* 0x3F - READ CACHE END:
Tells the NAND chip this is the end of the sequential cache read, the
current cache shall remain accessible for the host but no more
internal cache loading operation is required.
On the bus, a multi page read operation is currently handled like this:
00 -- ADDR1 -- 30 -- WAIT_RDY (tR+tRR) -- DATA1_IN
00 -- ADDR2 -- 30 -- WAIT_RDY (tR+tRR) -- DATA2_IN
00 -- ADDR3 -- 30 -- WAIT_RDY (tR+tRR) -- DATA3_IN
Sequential cached reads may instead be achieved with:
00 -- ADDR1 -- 30 -- WAIT_RDY (tR) -- \
31 -- WAIT_RDY (tRCBSY+tRR) -- DATA1_IN \
31 -- WAIT_RDY (tRCBSY+tRR) -- DATA2_IN \
3F -- WAIT_RDY (tRCBSY+tRR) -- DATA3_IN
Below are the read speed test results with regular reads and
sequential cached reads, on NXP i.MX6 VAR-SOM-SOLO in mapping mode with
a NAND chip characterized with the following timings:
* tR: 20 µs
* tRCBSY: 5 µs
* tRR: 20 ns
and the following geometry:
* device size: 2 MiB
* eraseblock size: 128 kiB
* page size: 2 kiB
============= Normal read @ 33MHz =================
mtd_speedtest: eraseblock read speed is 15633 KiB/s
mtd_speedtest: page read speed is 15515 KiB/s
mtd_speedtest: 2 page read speed is 15398 KiB/s
===================================================
========= Sequential cache read @ 33MHz ===========
mtd_speedtest: eraseblock read speed is 18285 KiB/s
mtd_speedtest: page read speed is 15875 KiB/s
mtd_speedtest: 2 page read speed is 16253 KiB/s
===================================================
We observe an overall speed improvement of about 5% when reading
2 pages, up to 15% when reading an entire block. This is due to the
~14us gain on each additional page read (tR - (tRCBSY + tRR)).
Co-developed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: JaimeLiao <jaimeliao.tw@gmail.com>
Tested-by: Liao Jaime <jaimeliao.tw@gmail.com>
Link: https://lore.kernel.org/linux-mtd/20230112093637.987838-4-miquel.raynal@bootlin.com
When MTD or MTD_CFI_GEOMETRY is disabled, the spi-intel driver
fails to build, as it includes the shared CFI header:
include/linux/mtd/cfi.h:62:2: error: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp]
62 | #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
linux/mtd/spi-nor.h does not actually need to include cfi.h, so
remove the inclusion here to fix the warning. This uncovers a
missing #include in spi-nor/core.c so add that there to
prevent a different build issue.
Fixes: e23e5a05d1 ("mtd: spi-nor: intel-spi: Convert to SPI MEM")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Tokunori Ikegami <ikegami.t@gmail.com>
Acked-by: Pratyush Yadav <pratyush@kernel.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221220141352.1486360-1-arnd@kernel.org
SPI NOR core changes:
* Add support for flash reset using the dt reset-gpios property.
* Update hwcaps.mask to include 8D-8D-8D read and page program ops
when xSPI profile 1.0 table is defined.
* Bypass zero erase size in spi_nor_find_best_erase_type().
* Fix select_uniform_erase to skip 0 erase size
* Add generic flash driver. If a flash is not found in the flash_info
array, fall back to the generic flash driver which is described solely
by the flash's SFDP tables.
* Fix the number of bytes for the dummy cycles in
spi_nor_spimem_check_readop().
* Introduce SPI_NOR_QUAD_PP flag, as PP_1_1_4 is not SFDP discoverable.
SPI NOR manufacturer drivers changes:
* Spansion:
- use PARSE_SFDP for s28hs512t,
- add support for s28hl512t, s28hl01gt, and s28hs01gt.
* Gigadevice: Replace default_init() with post_bfpt() for gd25q256.
* Micron - ST: Enable locking for mt25qu256a.
* Winbond: Add support for W25Q512NW-IQ.
* ISSI: Use PARSE_SFDP and SPI_NOR_QUAD_PP.
Fix merge conflict in the jedec,spi-nor bindings.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
At the moment, we print the JEDEC ID that is stored in our database. The
generic flash support won't have such an entry in our database. To find
out the JEDEC ID later we will have to cache it. There is also another
advantage: If the flash is found in the database, the ID could be
truncated because the ID of the entry is used which can be shorter. Some
flashes still holds valuable information in the bytes after the JEDEC ID
and come in handy during debugging of when coping with INFO6() entries.
These are not accessible for now.
Save a copy of the ID bytes after reading and display it via debugfs.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
Link: https://lore.kernel.org/r/20220810220654.1297699-4-michael@walle.cc
Pull char/misc and other driver updates from Greg KH:
"Here is the large set of char/misc and other small driver subsystem
changes for 6.1-rc1. Loads of different things in here:
- IIO driver updates, additions, and changes. Probably the largest
part of the diffstat
- habanalabs driver update with support for new hardware and
features, the second largest part of the diff.
- fpga subsystem driver updates and additions
- mhi subsystem updates
- Coresight driver updates
- gnss subsystem updates
- extcon driver updates
- icc subsystem updates
- fsi subsystem updates
- nvmem subsystem and driver updates
- misc driver updates
- speakup driver additions for new features
- lots of tiny driver updates and cleanups
All of these have been in the linux-next tree for a while with no
reported issues"
* tag 'char-misc-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (411 commits)
w1: Split memcpy() of struct cn_msg flexible array
spmi: pmic-arb: increase SPMI transaction timeout delay
spmi: pmic-arb: block access for invalid PMIC arbiter v5 SPMI writes
spmi: pmic-arb: correct duplicate APID to PPID mapping logic
spmi: pmic-arb: add support to dispatch interrupt based on IRQ status
spmi: pmic-arb: check apid against limits before calling irq handler
spmi: pmic-arb: do not ack and clear peripheral interrupts in cleanup_irq
spmi: pmic-arb: handle spurious interrupt
spmi: pmic-arb: add a print in cleanup_irq
drivers: spmi: Directly use ida_alloc()/free()
MAINTAINERS: add TI ECAP driver info
counter: ti-ecap-capture: capture driver support for ECAP
Documentation: ABI: sysfs-bus-counter: add frequency & num_overflows items
dt-bindings: counter: add ti,am62-ecap-capture.yaml
counter: Introduce the COUNTER_COMP_ARRAY component type
counter: Consolidate Counter extension sysfs attribute creation
counter: Introduce the Count capture component
counter: 104-quad-8: Add Signal polarity component
counter: Introduce the Signal polarity component
counter: interrupt-cnt: Implement watch_validate callback
...
Extend struct mtd_req_stats with two new fields holding the number of
corrected bitflips and uncorrectable errors detected during a read
operation. This is a prerequisite for ultimately passing those counters
to user space, where they can be useful to applications for making
better-informed choices about moving data around.
Unlike 'max_bitflips' (which is set - in a common code path - to the
return value of a function called while the MTD device's mutex is held),
these counters have to be maintained in each MTD driver which defines
the '_read_oob' callback because the statistics need to be calculated
while the MTD device's mutex is held.
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220629125737.14418-4-kernel@kempniu.pl
mtd_read_oob() callers are currently oblivious to the details of ECC
errors detected during the read operation - they only learn (through the
return value) whether any corrected bitflips or uncorrectable errors
occurred. More detailed ECC information can be useful to user-space
applications for making better-informed choices about moving data
around.
Extend struct mtd_oob_ops with a pointer to a newly-introduced struct
mtd_req_stats and set its 'max_bitflips' field to the maximum number of
bitflips found in a single ECC step during the read operation performed
by mtd_read_oob(). This is a prerequisite for ultimately passing that
value back to user space.
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220629125737.14418-2-kernel@kempniu.pl
