[PATCH v2 00/71] bootstd: Allow migration from distro_bootcmd scripts

Simon Glass sjg at chromium.org
Sun Jan 8 03:49:36 CET 2023


So far, standard boot does not replicate all the of the functionality
of the distro_bootcmd scripts. In particular it lacks some bootdevs and
some of the bootmeths are incomplete.

Also there is currently no internal mechanism to enumerate buses in order
to discover bootdevs, e.g. with USB.

This series addresses these shortcomings:

- Adds the concept of a 'bootdev hunter' to enumerate buses, etc. in an
  effort to find bootdevs of a certain priority
- Adds bootdevs for SCSI, IDE, NVMe, virtio, SPI flash
- Handles PXE and DHCP properly
- Supports reading the device tree with EFI and reading scripts from the
  network

It also tidies up label processing, so it is possible to use:

   bootflow scan mmc2

to scan just one MMC device (with BOOTSTD_FULL).

As before this implementation still relies on CONFIG_CMDLINE being
enabled, mostly for the network stack. Further work would be required to
disentangle that.

Quite a few tests are added but there are some gaps:

- SPI flash bootdev
- EFI FDT loading

Note that SATA works via SCSI (CONFIG_SCSI_AHCI) and does not use
driver model. Only pogo_v4 seems to be affected. Probably all thats is
needed is to call bootdev_setup_sibling_blk() in the Marvell SATA driver.

Also, while it would be possible to init MMC in a bootdev hunter, there is
no point since U-Boot always inits MMC on startup, if present.

With this series it should be possible to migrate boards to standard boot
by removing the inclusion of config_distro_bootcmd.h and instead adding
a suitable value for boot_targets to the environment, e.g.:

   boot_targets=mmc1 mmc0 nvme scsi usb pxe dhcp spi

Thus it is possible to boot automatically without scripts and boards can
use a text-based environment instead of the config.h files.

To demonstrate this, rockpro64-rk3399 is migrated to standard boot in this
series. Full migration could probably be automated using a script, similar
in concept to moveconfig:

   - obtain the board environment via 'make u-boot-initial-env'
   - get the value of "boot_targets"
   - drop config_distro_bootcmd.h from the config.h file
   - rebuild again to get the environment without distro scripts
   - write the environment (adding boot_targets) to board.env
   - remove CONFIG_EXTRA_ENV_SETTINGS from the config.h file

This series is based on top of the boot menu series v3 [1].
The tree is available at u-boot-dm/dis-working

[1] https://patchwork.ozlabs.org/project/uboot/list/?series=335364

Changes in v2:
- Rebase to -next

Simon Glass (71):
  dm: core: Correct ordering of uclasses IDs
  dm: core: Support sorting devices with dm tree
  dm: test: Correct assertion in dm_test_part()
  lib: Add a function to split a string into substrings
  bootstd: Remove special-case code for boot_targets
  bootstd: Simplify locating existing bootdevs
  test: Fix the help for the ut command
  test: Drop duplicate restore of DM state
  sandbox: mmc: Start off with a zeroed file
  vbe: Avoid a build failure when bloblist is not enabled
  vbe: sandbox: Drop VBE node in chosen
  dm: part: Update test to use mmc2
  dm: test: Correct ordering of DM setup
  ide: Drop non-DM code for BLK
  dm: mmc: Use bootdev_setup_sibling_blk()
  bootstd: Add a default method to get bootflows
  sandbox: Allow ethernet to be disabled at runtime
  sandbox: Allow ethernet bootdevs to be disabled for tests
  sandbox: Enable the Ethernet bootdev
  lib: Support printing an error string
  event: Correct duplicate log message in event_notify()
  efi: Improve logging in efi_disk
  bootstd: Add the concept of a bootdev hunter
  bootstd: Support running bootdev hunters
  dm: usb: Drop some dead code
  dm: usb: Mark the device name as alloced when binding
  test: Add a generic function to skip delays
  bootstd: Add a USB hunter
  bootstd: Add an MMC hunter
  net: Add a function to run dhcp
  bootstd: Add a hunter for ethernet
  part: Add a function to find the first bootable partition
  bootstd: Only scan bootable partitions
  scsi: Correct allocation of block-device name
  scsi: Remove all children of SCSI devices before rescanning
  bootstd: Add a SCSI bootdev
  bootstd: Add an IDE bootdev
  bootstd: Add an NVMe bootdev
  virtio: Avoid repeating a long expression
  virtio: Fix returning -ENODEV
  virtio: Avoid strange behaviour on removal
  virtio: Add a block device
  bootstd: Add a virtio bootdev
  ata: Don't try to use non-existent ports
  bootstd: Rename bootdev checkers
  bootstd: Allow reading an EFI file from the network
  bootstd: Include the device tree in the bootflow
  bootstd: Support reading the device tree with EFI
  bootstd: Set the distro_bootpart env var with scripts
  bootstd: Update docs on bootmeth_try_file() for sandbox
  bootstd: Move label parsing into its own function
  bootstd: Add a new bootmeth method to set the bootflow
  sandbox: Allow SPI flash bootdevs to be disabled for tests
  bootstd: Add a SPI flash bootdev
  bootstd: Support reading a script from network or SPI flash
  bootstd: Treat DHCP and PXE as bootdev labels
  bootstd: Use hunters when scanning for bootflows
  bootstd: Allow hunting for bootdevs of a given priority
  bootstd: Add a new pre-scan priority for bootdevs
  bootstd: Allow hunting for a bootdev by label
  bootstd: Allow iterating to the next label in a list
  bootstd: Allow iterating to the next bootdev priortiy
  extension: Refactor to allow non-command usage
  bootstd: Add a hunter for the extension feature
  bootstd: Switch bootdev scanning to use labels
  bootstd: Allow scanning a single bootdev label
  bootstd: Drop the old bootflow_scan_first()
  bootstd: Record the bootdevs used during scanning
  bootstd: Add a little more logging of bootflows
  bootstd: Update documentation for new features
  rockchip: Convert rockpro64-rk3399 to use standard boot

 arch/sandbox/cpu/state.c           |  30 ++
 arch/sandbox/dts/sandbox.dtsi      |  13 -
 arch/sandbox/dts/test.dts          |   6 +
 arch/sandbox/include/asm/state.h   |   2 +
 arch/sandbox/include/asm/test.h    |  30 ++
 boot/bootdev-uclass.c              | 551 +++++++++++++++++++---------
 boot/bootflow.c                    | 173 ++++++---
 boot/bootmeth-uclass.c             |  11 +
 boot/bootmeth_distro.c             |   2 +-
 boot/bootmeth_efi.c                | 220 ++++++++++-
 boot/bootmeth_efi_mgr.c            |   2 +-
 boot/bootmeth_pxe.c                |   5 +-
 boot/bootmeth_script.c             |  98 ++++-
 boot/bootstd-uclass.c              |  17 +-
 boot/vbe_simple_fw.c               |   2 +-
 cmd/bootdev.c                      |  42 ++-
 cmd/bootflow.c                     |  97 +++--
 cmd/dm.c                           |  10 +-
 cmd/extension_board.c              |  43 ++-
 cmd/net.c                          |  35 ++
 cmd/vbe.c                          |   7 +-
 common/event.c                     |   2 +-
 configs/sandbox_defconfig          |   2 +-
 configs/sandbox_flattree_defconfig |  10 +-
 disk/part.c                        |  16 +
 doc/develop/bootstd.rst            | 221 +++++++----
 doc/develop/driver-model/nvme.rst  |   2 +-
 doc/usage/cmd/bootdev.rst          |  48 ++-
 doc/usage/cmd/bootflow.rst         |  17 +-
 doc/usage/cmd/dm.rst               |   5 +-
 drivers/ata/ahci.c                 |   6 +
 drivers/block/ide.c                |  86 ++---
 drivers/core/dump.c                |  65 +++-
 drivers/mmc/mmc-uclass.c           |   2 +-
 drivers/mmc/mmc_bootdev.c          |  33 +-
 drivers/mmc/sandbox_mmc.c          |   2 +-
 drivers/mtd/spi/Kconfig            |   8 +
 drivers/mtd/spi/Makefile           |   1 +
 drivers/mtd/spi/sf-uclass.c        |  11 +
 drivers/mtd/spi/sf_bootdev.c       |  82 +++++
 drivers/nvme/nvme-uclass.c         |  54 +++
 drivers/nvme/nvme.c                |   5 +
 drivers/scsi/Makefile              |   7 +
 drivers/scsi/scsi.c                |  32 +-
 drivers/scsi/scsi_bootdev.c        |  62 ++++
 drivers/usb/host/usb-uclass.c      |  45 +--
 drivers/usb/host/usb_bootdev.c     |  38 +-
 drivers/virtio/virtio-uclass.c     |  62 +++-
 drivers/virtio/virtio_sandbox.c    |  16 +-
 include/bootdev.h                  | 206 ++++++++++-
 include/bootflow.h                 | 134 +++++--
 include/bootmeth.h                 |  35 +-
 include/bootstd.h                  |  17 +-
 include/configs/rk3399_common.h    |   5 +-
 include/configs/rockchip-common.h  |   2 +
 include/dm/uclass-id.h             |   4 +-
 include/dm/util.h                  |   8 +-
 include/net.h                      |  31 ++
 include/part.h                     |   8 +
 include/test/test.h                |  72 ++++
 include/vsprintf.h                 |  24 ++
 lib/efi_loader/efi_disk.c          |  30 +-
 lib/strto.c                        |  41 +++
 lib/vsprintf.c                     |  12 +
 net/eth-uclass.c                   |  14 +-
 net/eth_bootdev.c                  |  68 ++--
 net/net.c                          |   4 +
 test/boot/bootdev.c                | 563 +++++++++++++++++++++++++++--
 test/boot/bootflow.c               | 138 +++++--
 test/boot/bootstd_common.c         |  19 +
 test/boot/bootstd_common.h         |  13 +
 test/cmd_ut.c                      |   2 +-
 test/dm/part.c                     |  37 +-
 test/dm/virtio_device.c            |   3 +
 test/py/tests/bootstd/mmc1.img.xz  | Bin 4448 -> 4480 bytes
 test/py/tests/test_dm.py           |  38 ++
 test/py/tests/test_ut.py           |  13 +-
 test/str_ut.c                      |  82 +++++
 test/test-main.c                   |  24 +-
 79 files changed, 3225 insertions(+), 758 deletions(-)
 create mode 100644 drivers/mtd/spi/sf_bootdev.c
 create mode 100644 drivers/scsi/scsi_bootdev.c

-- 
2.39.0.314.g84b9a713c41-goog



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