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From 475cb041a97d3c7140efd1b0cda820fb22b69d11 Mon Sep 17 00:00:00 2001
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From: Dan Williams <dan.j.williams@intel.com>
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Date: Wed, 5 Jan 2022 13:31:44 -0800
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Subject: [PATCH 069/217] ndctl/docs: Clarify update-firwmware activation
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'overflow' conditions
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Give examples and remediation for "overflow" events, i.e. where the
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estimated time to complete activation exceeds the platform advertised
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maximum. When that happens forced activation can lead to undefined results.
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Link: https://lore.kernel.org/r/164141830490.3990253.6263569501446070716.stgit@dwillia2-desk3.amr.corp.intel.com
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Tested-by: Alison Schofield <alison.schofield@intel.com>
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Tested-by: Vaibhav Jain <vaibhav@linux.ibm.com>
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Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
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---
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Documentation/ndctl/ndctl-update-firmware.txt | 64 ++++++++++++++++++-
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1 file changed, 63 insertions(+), 1 deletion(-)
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diff --git a/Documentation/ndctl/ndctl-update-firmware.txt b/Documentation/ndctl/ndctl-update-firmware.txt
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index 1080d62..6166457 100644
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--- a/Documentation/ndctl/ndctl-update-firmware.txt
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+++ b/Documentation/ndctl/ndctl-update-firmware.txt
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@@ -58,7 +58,69 @@ include::xable-bus-options.txt[]
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Arm a device for firmware activation. This is enabled by default
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when a firmware image is specified. Specify --no-arm to disable
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this default. Otherwise, without a firmware image, this option can be
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- used to manually arm a device for firmware activate.
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+ used to manually arm a device for firmware activate. When a
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+ device transitions from unarmed to armed the platform recalculates the
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+ firmware activation time and compares it against the maximum platform
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+ supported time. If the activation time would exceed the platform maximum the
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+ arm attempt is aborted:
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+
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+[verse]
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+ndctl update-firmware --arm --bus=nfit_test.0 all
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+ Error: update firmware: nmem4: arm aborted, tripped overflow
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+[
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+ {
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+ "dev":"nmem1",
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+ "id":"cdab-0a-07e0-ffffffff",
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+ "handle":"0",
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+ "phys_id":"0",
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+ "security":"disabled",
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+ "firmware":{
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+ "current_version":"0",
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+ "can_update":true
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+ }
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+ },
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+ {
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+ "dev":"nmem3",
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+ "id":"cdab-0a-07e0-fffeffff",
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+ "handle":"0x100",
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+ "phys_id":"0x2",
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+ "security":"disabled",
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+ "firmware":{
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+ "current_version":"0",
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+ "can_update":true
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+ }
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+ },
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+ {
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+ "dev":"nmem2",
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+ "id":"cdab-0a-07e0-feffffff",
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+ "handle":"0x1",
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+ "phys_id":"0x1",
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+ "security":"disabled",
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+ "firmware":{
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+ "current_version":"0",
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+ "can_update":true
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+ }
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+ }
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+]
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+updated 3 nmems.
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+
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+ It is possible, but not recommended, to ignore timeout overflows
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+ with the --force option. At any point to view the 'armed' state of the
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+ bus do:
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+
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+[verse]
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+ndctl list -BF -b nfit_test.0
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+[
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+ {
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+ "provider":"nfit_test.0",
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+ "dev":"ndbus2",
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+ "scrub_state":"idle",
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+ "firmware":{
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+ "activate_method":"suspend",
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+ "activate_state":"overflow"
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+ }
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+ }
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+]
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-D::
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--disarm::
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--
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2.27.0
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