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Bjorn Andersson
16ca90ba9a
Inspecting or editing a device's flash previously meant dumping partitions to files and reflashing them; there was no way to treat the live storage as a random-access block device. Exposing a LUN over nbdkit lets ordinary host tools - parted, mount, dd, imaging tools - operate on it directly. Add an nbdkit plugin that uploads the firehose programmer and serves a physical partition (LUN) as a read/write block device: $ modprobe nbd $ nbdkit -fv ./nbdkit-qdl-plugin.so programmer=prog_firehose_ddr.elf lun=0 meson builds it only when the nbdkit dependency is present (pass -Dnbdkit=enabled to require it), producing nbdkit-qdl-plugin.so from the shared qdl sources; the qdl binary is unaffected. An EDL device can only be programmed once per session - uploading the programmer is a one-shot transition and a reset reboots it out of firehose - but nbdkit calls .open/.close several times per client (NBD_OPT_INFO to probe, then NBD_OPT_GO to transfer). Programming per open and resetting per close therefore made the first close reboot the board and every later open time out. To solve this the plugin sets the device up once, on the first open, keeps it configured across connections, and resets it only when the plugin unloads. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Igor Opaniuk <igor.opaniuk@oss.qualcomm.com>
4 lines
283 B
Meson
4 lines
283 B
Meson
option('VERSION', type: 'string', value: '', description: 'Project version')
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option('tests', type: 'feature', value: 'auto', description: 'Build unit tests (requires cmocka)')
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option('nbdkit', type: 'feature', value: 'auto', description: 'Build the nbdkit plugin (requires nbdkit)')
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