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8d14ca9c99
Currently, bwn(4) relies on the siba_bwn(4) bus driver to provide support
for the on-chip SSB interconnect found in Broadcom's older PCI(e) Wi-Fi
adapters. Non-PCI Wi-Fi adapters, as well as the newer BCMA interconnect
found in post-2009 Broadcom Wi-Fi hardware, are not supported by
siba_bwn(4).
The bhnd(4) bus driver (also used by the FreeBSD/MIPS Broadcom port)
provides a unified kernel interface to a superset of the hardware supported
by siba_bwn; by attaching bwn(4) via bhnd(4), we can support both modern
PCI(e) Wi-Fi devices based on the BCMA backplane interconnect, as well as
Broadcom MIPS WiSoCs that include a D11 MAC core directly attached to their
SSB or BCMA backplane.
This diff introduces opt-in bwn(4) support for bhnd(4) by providing:
- A small bwn(4) driver subclass, if_bwn_bhnd, that attaches via
bhnd(4) instead of siba_bwn(4).
- A bhndb(4)-based PCI host bridge driver, if_bwn_pci, that optionally
probes at a higher priority than the siba_bwn(4) PCI driver.
- A set of compatibility shims that perform translation of bwn(4)'s
siba_bwn function calls into their bhnd(9) API equivalents when bwn(4)
is attached via a bhnd(4) bus parent. When bwn(4) is attached via
siba_bwn(4), all siba_bwn function calls are simply passed through to
their original implementations.
To test bwn(4) with bhnd(4), place the following lines in loader.conf(5):
hw.bwn_pci.preferred="1"
if_bwn_pci_load="YES
bwn_v4_ucode_load="YES"
bwn_v4_lp_ucode_load="YES"
To verify that bwn(4) is using bhnd(4), you can check dmesg:
bwn0: <Broadcom 802.11 MAC/PHY/Radio, rev 15> ... on bhnd0
... or devinfo(8):
pcib2
pci2
bwn_pci0
bhndb0
bhnd0
bwn0
...
bwn(4)/bhnd(4) has been tested for regressions with most chipsets currently
supported by bwn(4), including:
- BCM4312
- BCM4318
- BCM4321
With minimal changes to the DMA code (not included in this commit), I was
also able to test support for newer BCMA devices by bringing up basic
working Wi-Fi on two previously unsupported, BCMA-based N-PHY chipsets:
- BCM43224
- BCM43225
Approved by: adrian (mentor, implicit)
Sponsored by: The FreeBSD Foundation & Plausible Labs
Differential Revision: https://reviews.freebsd.org/D13041
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| .. | ||
| config.mk | ||
| dtb.mk | ||
| files | ||
| files.amd64 | ||
| files.arm | ||
| files.arm64 | ||
| files.i386 | ||
| files.mips | ||
| files.powerpc | ||
| files.riscv | ||
| files.sparc64 | ||
| kern.mk | ||
| kern.opts.mk | ||
| kern.post.mk | ||
| kern.pre.mk | ||
| kmod.mk | ||
| kmod_syms.awk | ||
| kmod_syms_prefix.awk | ||
| ldscript.amd64 | ||
| ldscript.arm | ||
| ldscript.arm64 | ||
| ldscript.i386 | ||
| ldscript.mips | ||
| ldscript.mips.cfe | ||
| ldscript.mips.mips64 | ||
| ldscript.mips.octeon1 | ||
| ldscript.powerpc | ||
| ldscript.powerpc64 | ||
| ldscript.powerpcspe | ||
| ldscript.riscv | ||
| ldscript.sparc64 | ||
| Makefile.amd64 | ||
| Makefile.arm | ||
| Makefile.arm64 | ||
| Makefile.i386 | ||
| Makefile.mips | ||
| Makefile.powerpc | ||
| Makefile.riscv | ||
| Makefile.sparc64 | ||
| makeLINT.mk | ||
| makeLINT.sed | ||
| newvers.sh | ||
| NOTES | ||
| options | ||
| options.amd64 | ||
| options.arm | ||
| options.arm64 | ||
| options.i386 | ||
| options.mips | ||
| options.powerpc | ||
| options.riscv | ||
| options.sparc64 | ||
| systags.sh | ||
| WITHOUT_SOURCELESS | ||
| WITHOUT_SOURCELESS_HOST | ||
| WITHOUT_SOURCELESS_UCODE | ||