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    Subject[PATCH v15 0/5] Provide basic driver to control Arm R5 co-processor found on Xilinx ZynqMP
    Date
    The driver was tested on Xilinx ZynqMP QEMU

    For sake of ease of review, only support ZynqMP. Once accepted, then
    add support for Versal platform and R5 loading onto OCM.

    v2:
    - remove domain struct
    v3:
    - add xilinx-related platform mgmt fn's instead of wrapping around
    function pointer in xilinx eemi ops struct
    - update zynqmp_r5 yaml parsing to not raise warnings for extra
    information in children of R5 node. The warning "node has a unit
    name, but no reg or ranges property" will still be raised though
    as this particular node is needed to describe the
    '#address-cells' and '#size-cells' information.
    v4:
    - add default values for enums
    - fix formatting as per checkpatch.pl --strict. Note that 1 warning and
    1 check are still raised as each is due to fixing the warning
    results in that particular line going over 80 characters.
    - remove warning '/example-0/rpu@ff9a0000/r5@0:
    node has a unit name, but no reg or ranges property'
    by adding reg to r5 node.
    v5:
    - update device tree sample and yaml parsing to not raise any warnings
    - description for memory-region in yaml parsing
    - compatible string in yaml parsing for TCM
    - parse_fw change from use of rproc_of_resm_mem_entry_init to
    rproc_mem_entry_init and use of alloc/release
    - var's of type zynqmp_r5_pdata all have same local variable name
    - use dev_dbg instead of dev_info
    v6:
    - adding memory carveouts is handled much more similarly.
    All mem carveouts are now described in reserved memory as needed.
    That is, TCM nodes are not coupled to remoteproc anymore.
    This is reflected in the remoteproc R5 driver and the device tree
    binding.
    - remove mailbox from device tree binding as it is not necessary for elf
    loading
    v7:
    - remove unused headers
    - zynqmp_r5_remoteproc_probe:lockstep_mode from u32* to u32
    - device-tree binding "lockstep-mode" to "xlnx,cluster-mode"
    - remove zynqmp_r5_mem_probe and loop to Probe R5 memory devices at
    probe()
    - remove is_r5_mode_set from zynqmp rpu remote processor private data
    - do not error out if no mailbox is provided since mailboxes are optional
    - remove zynqmp_r5_remoteproc_probe call of platform_set_drvdata as pdata
    is handled in zynqmp_r5_remoteproc_remove
    v8:
    - remove old acks, reviewed-by's in commit message
    v9:
    - if zynqmp_r5_remoteproc.c pdata->tx_mc_skbs not initialized, then do not
    call skb_queue_empty
    - update arguments and documentation for zynqmp_pm_set_rpu_mode
    - in fn zynqmp_pm_force_powerdown, change arg 'target' to 'node'
    - zynqmp_pm_request_wakeup update code style
    - edit 3/5 patch commit message
    - document zynqmp_pm_set_tcm_config and zynqmp_pm_get_rpu_mode
    documentation to include expected return val
    - remove unused fn zynqmp_pm_get_node_status
    - update 5/5 patch commit message to document supported configurations
    and how they are booted by the driver.
    - remove copyrights other than SPDX from zynqmp_r5_remoteproc.c
    - compilation warnings no longer raised
    - remove unused includes from zynqmp_r5_remoteproc.c
    - remove unused var autoboot from zynqmp_r5_remoteproc.c
    - reorder zynqmp_r5_pdata fpr small mem savings due to alignment
    - zynqmp_pm_set_tcm_config and zynqmp_pm_set_rpu_mode uses second arg
    - zynqmp_r5_remoteproc.c use of zynqmp_pm_set_tcm_config now does not
    have output arg
    - in tcm handling, unconditionally use &= 0x000fffff mask since all nodes
    in this fn are for tcm
    - update comments for translating dma field in tcm handling to device
    address
    - update calls to rproc_mem_entry_init in parse_mem_regions so that there
    are only 2 cases for types of carveouts instead of 3
    - in parse_mem_regions, check if device tree node is null before using it
    - add example device tree nodes used in parse_mem_regions and tcm parsing
    - add comment for vring id node length
    - add check for string length so that vring id is at least min length
    - move tcm nodes from reserved mem to instead own device tree nodes
    and only use them if enabled in device tree
    - add comment for explaining handling of rproc_elf_load_rsc_table
    - remove obsolete check for "if (vqid < 0)" in zynqmp_r5_rproc_kick
    - remove unused field mems in struct zynqmp_r5_pdata
    - remove call to zynqmp_r5_mem_probe and the fn itself as tcm handling
    is done by zyqmp_r5_pm_request_tcm
    - remove obsolete setting of dma_ops and parent device dma_mask
    - remove obsolete use of of_dma_configure
    - add comment for call to r5_set_mode fn
    - make mbox usage optional and gracefully inform user via dev_dbg if not
    present
    - change lockstep_mode from u32* to u32
    - update zynqmp_pm_set_rpu_mode and zynqmp_pm_set_rpu_mode documentation
    and remove unused args
    v10:
    - add include types.h to xlnx-zynqmp.h for compilation
    v11:
    - update usage of zynqmp_pm_get_rpu_mode to return rpu mode in enum
    - update zynqmp_pm_set_tcm_config and zynqmp_pm_set_rpu_mode arguments to
    remove unused args
    - use enums instead of u32 where possible in zynqmp_r5_remoteproc
    - zynqmp_r5_remoteproc: update prints to not use carriage return, just
    newline
    - zynqmp_r5_remoteproc: look up tcm banks via property instead of string
    name
    - print device tree nodes with %pOF instead of %s with node name field
    - update tcm release to unmap VA
    - handle r5-1 use case
    - device tree binding r5 node to have link to TCMs via
    meta-memory-regions property
    - fix device tree binding so no warnings from 'make dt_binding_check'
    v12:
    - update signed off by so that latest developer name is last
    - in drivers/firmware/zynqmp.c, update zynqmp_pm_set_rpu_mode so rpu_mode
    is only set if no error
    - update args for zynqmp_pm_set_rpu_mode, zynqmp_pm_set_tcm_config fn
    arg's to reflect what is expected in the function and the usage in
    zynqmp_r5_remoteproc accordingly
    v13:
    - zynqmp_pm_get_rpu_mode argument zynqmp_pm_get_rpu_mode is
    only set if no error
    v14:
    - rebase off v5.9-rc3 kernel
    - concerns were raised about the new property meta-memory-regions.
    There is no clear direction so for the moment I kept it in the series
    - in device tree binding, place IPC nodes in RAM in the reserved memory section
    - change zynqmp_r5_remoteproc::rpus and rpu_mode to static
    - fix typo
    - zynqmp_r5_remoteproc::r5_set_mode set rpu mode from
    property specified in device tree
    - use u32 instead of u32* to store in remoteproc memory entry private data
    for pnode_id information
    - always call r5_set_mode on probe
    - remove alloc of zynqmp_r5_pdata in
    zynqmp_r5_remoteproc::zynqmp_r5_remoteproc_probe as there is static
    allocation already
    - error at probe time if lockstep-mode property not present in device tree
    - update commit message as per review
    - remove dependency on MAILBOX in makefile as ZYNQMP_IPI_MBOX is present
    - remove unused macros
    - update comment ordering of zynqmp_r5_pdata to match struct definition
    - zynqmp_r5_remoteproc::tcm_mem_release error if pnode id is invalid
    - remove obsolete TODOs
    - only call zynqmp_r5_remoteproc::zynqmp_r5_probe if the index is valid
    - remove uneven dev_dbg/dev_err fn calls
    v15:
    - change lockstep mode device tree property from acting as
    boolean, to instead being used as, if it is present, then r5 is in lockstep mode. otherwise in split.
    - add safeguard for if 2 rpu remoteproc instances are provided then err out

    Ben Levinsky (5):
    firmware: xilinx: Add ZynqMP firmware ioctl enums for RPU
    configuration.
    firmware: xilinx: Add shutdown/wakeup APIs
    firmware: xilinx: Add RPU configuration APIs
    dt-bindings: remoteproc: Add documentation for ZynqMP R5 rproc
    bindings
    remoteproc: Add initial zynqmp R5 remoteproc driver

    .../xilinx,zynqmp-r5-remoteproc.yaml | 120 +++
    drivers/firmware/xilinx/zynqmp.c | 96 +++
    drivers/remoteproc/Kconfig | 8 +
    drivers/remoteproc/Makefile | 1 +
    drivers/remoteproc/zynqmp_r5_remoteproc.c | 769 ++++++++++++++++++
    include/linux/firmware/xlnx-zynqmp.h | 60 ++
    6 files changed, 1054 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml
    create mode 100644 drivers/remoteproc/zynqmp_r5_remoteproc.c

    --
    2.17.1

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