linux-kernel - Re: [PATCH v1 3/4] MIPS: bmips: Remove obsolete DMA mapping support

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Date:   Tue, 08 Feb 2022 11:34:13 +0100
From:   nicolas saenz julienne <nsaenz@...nel.org>
To:     Jim Quinlan <jim2101024@...il.com>, linux-pci@...r.kernel.org,
        linux-mips@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        Kevin Cernekee <cernekee@...il.com>,
        bcm-kernel-feedback-list@...adcom.com, james.quinlan@...adcom.com
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Florian Fainelli <f.fainelli@...il.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 3/4] MIPS: bmips: Remove obsolete DMA mapping support

On Thu, 2021-12-09 at 15:47 -0500, Jim Quinlan wrote:
> The code in 'arch/mips/bmips/dma.c' performed DMA mapping for inbound
> regions.  This mapping was and is required for the Broadcom STB PCIe
> controller HW.  This code is removed as the current 'struct device' has a
> @dma_range_map field which performs the same functionality by processing
> the "dma-ranges" DT property.
> 
> Subsequently, ARCH_HAS_PHYS_TO_DMA is now unset since the dma_to_phys()
> and phys_to_dma() functions are removed.
> 
> Signed-off-by: Jim Quinlan <jim2101024@...il.com>
> ---

Reviewed-by: Nicolas Saenz Julienne <nsaenz@...nel.org>

Regards,
Nicolas