[PATCH v4 0/2] scsi: ufs: Add support for the aggregated read query opcode

[Hyeoncheol Jeong]

UFS 5.0 / JEDEC 220H introduces the AGGREGATED READ query opcode (0x9),
which retrieves an aggregated data packet bundling multiple Descriptors,
Attributes and Flags in a single QUERY RESPONSE UPIU. Such a packet can be
far larger than a single descriptor, so the reserved (device management)
tag gets a dedicated UCD with an enlarged response area.

Patch 1 is a preparatory cleanup that switches the BSG query descriptor
length to unsigned types. Patch 2 adds the aggregated read support.

Changes since v3:
- Patch 1: drop the (u16) cast in min() (Bart Van Assche).
- Patch 2: reject Advanced RPMB BSG requests with more than
  UFSHCD_DEVMAN_SG_ENTRIES scatter-gather segments before dma_map_sg()
  (Sashiko AI / Bart Van Assche).

v3: https://lore.kernel.org/linux-scsi/20260724030812epcms2p4eb2c77cb4dcd5fd51ca9c3eaa5ea4bfa@epcms2p4/
v2: https://lore.kernel.org/linux-scsi/20260722084819epcms2p49c27fce999e821385f7b5d7ea5a02868@epcms2p4/

Hyeoncheol Jeong (2):
  scsi: ufs: Use unsigned types for the BSG query descriptor length
  scsi: ufs: Add support for the aggregated read query opcode

 drivers/ufs/core/ufs-mcq.c | 14 ++++--
 drivers/ufs/core/ufs_bsg.c | 49 +++++++++++--------
 drivers/ufs/core/ufshcd.c  | 98 ++++++++++++++++++++++++++++----------
 include/ufs/ufs.h          |  6 +++
 include/ufs/ufshcd.h       | 20 ++++++++
 include/ufs/ufshci.h       | 12 +++++
 6 files changed, 151 insertions(+), 48 deletions(-)

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2.25.1