9c907eb913
In the DMA case, given we disable the data interrupts, we never seem to get DATA_END. Given we are relying on DMA interrupts we are not using the SDHCI state machine and hence only call into sdhci_platform_will_handle() for the first check of data. We do not call "will handle" for any following round trips of the same transaction if block size * count > BCM_DMA_BLOCK_SIZE. Manually check "left" in the DMA interrupt handler to see if we have at least another full BCM_DMA_BLOCK_SIZE to handle. Without this change we would DMA that and then even start a DMA with left == 0 which would lead to a timeout and error. Now we re-enable data interrupts and return and let the SDHCI generic interrupt handler and state machine pick the SPACE_AVAIL up and then find that it should punt to the pio_handler for the remaining bytes or finish the data transaction. With this change block mode seems to work beyond 7 * 64byte blocks, which worked as it was below BCM_DMA_BLOCK_SIZE. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D20199
FreeBSD Source:
This is the top level of the FreeBSD source directory. This file
was last revised on:
FreeBSD
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.
The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.
Source Roadmap:
bin System/user commands.
cddl Various commands and libraries under the Common Development
and Distribution License.
contrib Packages contributed by 3rd parties.
crypto Cryptography stuff (see crypto/README).
etc Template files for /etc.
gnu Various commands and libraries under the GNU Public License.
Please see gnu/COPYING* for more information.
include System include files.
kerberos5 Kerberos5 (Heimdal) package.
lib System libraries.
libexec System daemons.
release Release building Makefile & associated tools.
rescue Build system for statically linked /rescue utilities.
sbin System commands.
secure Cryptographic libraries and commands.
share Shared resources.
stand Boot loader sources.
sys Kernel sources.
sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
used in release builds. NOTES contains documentation of
all possible entries.
tests Regression tests which can be run by Kyua. See tests/README
for additional information.
tools Utilities for regression testing and miscellaneous tasks.
usr.bin User commands.
usr.sbin System administration commands.
For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:
https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html