Re: [PATCH 13/13] wifi: brcmfmac: Add BCM4388 support

[Arend van Spriel]

On Fri, 25 Sep 2026 23:43:48 +1000, Michael Reeves <michael.reeves077@xxxxxxxxx> wrote:
> From: Hector Martin <marcan@xxxxxxxxx>
>
> Add BCM4388 firmware mappings, RAM base and OTP handling, and increase
> the RX posting and completion ring capacities to 2048 items.
>
> On BCM4388, DMA_FROM_DEVICE mappings for posted receive buffers cause
> DART read-permission faults followed by firmware DMA failure. Map these
> buffers with DMA_BIDIRECTIONAL to allow device reads as well as writes.
> Keep the existing mapping direction for other chips.
>

Acked-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>

Regards,
Arend

> Signed-off-by: Hector Martin <marcan@xxxxxxxxx>
> Co-developed-by: Michael Reeves <michael.reeves077@xxxxxxxxx>
> Signed-off-by: Michael Reeves <michael.reeves077@xxxxxxxxx>
> ---
>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c      |  1 +
>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c    |  8 +++++---
>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.h    |  4 ++--
>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c      | 12 +++++++++++-
>  .../net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h    |  2 ++
>  5 files changed, 21 insertions(+), 6 deletions(-)