FreeBSD src
f4a3eb0297
This patchset adds support to bhnd_chipc for sharing SYS_RES_MEMORY resources with its children, allowing us to hang devices off of bhnd_chipc that rely on access to a subset of the device register space that bhnd_chipc itself must also allocate. We could avoid most of this heavy lifting if RF_SHAREABLE+SYS_RES_MEMORY wasn't limited to use with allocations at the same size/offset. As a work-around, I implemented something similar to vga_pci.c, which implements similar reference counting of of PCI BAR resources for its children. With these changes, chipc will use reference counting of SYS_RES_MEMORY allocation/activation requests, to decide when to allocate/activate/ deactivate/release resources from the parent bhnd(4) bus. The requesting child device is allocated a new resource from chipc's rman, pointing to (possibly a subregion of) the refcounted bhnd resources allocated by chipc. Other resource types are just passed directly to the parent bhnd bus; RF_SHAREABLE works just fine with IRQs. I also lifted the SPROM device code out into a common driver, since this now allows me to hang simple subclasses off of a common driver off of both bhndb_pci and bhnd_chipc. Tested: * (landonf) Tested against BCM4331 and BCM4312, confirmed that SPROM still attaches and can be queried. Submitted by: Landon Fuller <landonf@landonf.org> Reviewed by: mizkha@gmail.com Differential Revision: https://reviews.freebsd.org/D6471 |
||
|---|---|---|
| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ 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) and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The `buildkernel` and `installkernel` targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process. See build(7), config(8), and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information. Note: If you want to build and install the kernel with the `buildkernel` and `installkernel` targets, you might need to build world before. More information is available in the handbook. The kernel configuration files reside in the sys/<arch>/conf sub-directory. GENERIC is the default configuration used in release builds. NOTES contains entries and documentation for all possible devices, not just those commonly used. 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. sys Kernel sources. 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: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html