35bd464ee8
commit 1abc900ddda8ad2ef739fedf498d415655b6c3b8 upstream.
Some firmware versions of the 9600 series SAS HBA byte-swap the REPORT
ZONES command reply buffer from ATA-ZAC devices by directly accessing the
buffer in the host memory. This does not respect the default command DMA
direction and causes IOMMU page faults on architectures with an IOMMU
enforcing write-only mappings for DMA_FROM_DEVICE DMA direction (e.g. AMD
hosts), leading to the device capacity to be dropped to 0:
scsi 18:0:58:0: Direct-Access-ZBC ATA WDC WSH722626AL W930 PQ: 0 ANSI: 7
scsi 18:0:58:0: Power-on or device reset occurred
sd 18:0:58:0: Attached scsi generic sg9 type 20
sd 18:0:58:0: [sdj] Host-managed zoned block device
mpi3mr 0000:c1:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0001 address=0xfec0c400 flags=0x0050]
mpi3mr 0000:c1:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0001 address=0xfec0c500 flags=0x0050]
sd 18:0:58:0: [sdj] REPORT ZONES start lba 0 failed
sd 18:0:58:0: [sdj] REPORT ZONES: Result: hostbyte=DID_SOFT_ERROR driverbyte=DRIVER_OK
sd 18:0:58:0: [sdj] 0 4096-byte logical blocks: (0 B/0 B)
sd 18:0:58:0: [sdj] Write Protect is off
sd 18:0:58:0: [sdj] Mode Sense: 6b 00 10 08
sd 18:0:58:0: [sdj] Write cache: enabled, read cache: enabled, supports DPO and FUA
sd 18:0:58:0: [sdj] Attached SCSI disk
Avoid this issue by always mapping the buffer of REPORT ZONES commands
using DMA_BIDIRECTIONAL, that is, using a read-write IOMMU mapping.
Suggested-by: Christoph Hellwig <hch@lst.de>
Fixes: 023ab2a9b4ed ("scsi: mpi3mr: Add support for queue command processing")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240719073913.179559-2-dlemoal@kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.