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8d4ec3fbb1
Most PCIe HW returns 0xffffffff for failed reads on PCIe, but by default Broadcom's STB PCIe controller effects an abort. Some SoCs -- 7216 and its descendants -- have new HW that identifies error details. Add a simple handler to print diagnostic info in case the PCIe controller was the cause of the abort. Unfortunately, an abort still occurs. Read the error registers only when the PCIe bridge is active and the PCIe registers are accessible. Otherwise, a "die" event caused by something other than PCIe could cause an abort if the PCIe "die" handler tried to access registers when the bridge is off. Example error output: brcm-pcie 8b20000.pcie: Error: Mem Acc: 32bit, read, @0x38000000 brcm-pcie 8b20000.pcie: Type: TO=0 Abt=0 UnspReq=1 AccDsble=0 BadAddr=0 Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Link: https://patch.msgid.link/20251029193616.3670003-3-james.quinlan@broadcom.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.