mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Suresh Reddy
c1b3bdb2ff
This patch handles a TX-timeout as follows:
1) This patch gathers and prints the following info that can
help in diagnosing the cause of a TX-timeout.
a) TX queue and completion queue entries.
b) SKB and TCP/UDP header details.
2) For Lancer NICs (TX-timeout recovery is not supported for
BE3/Skyhawk-R NICs), it recovers from the TX timeout as follows:
a) On a TX-timeout, driver sets the PHYSDEV_CONTROL_FW_RESET_MASK
bit in the PHYSDEV_CONTROL register. Lancer firmware goes into
an error state and indicates this back to the driver via a bit
in a doorbell register.
b) Driver detects this and calls be_err_recover(). DMA is disabled,
all pending TX skbs are unmapped and freed (be_close()). All rings
are destroyed (be_clear()).
c) The driver waits for the FW to re-initialize and re-creates all
rings along with other data structs (be_resume())
Signed-off-by: Suresh Reddy <suresh.reddy@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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 Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
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.