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From: Michael Ellerman <mpe@ellerman.id.au>
To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	catalin.marinas@arm.com, hch@lst.de, wahrenst@gmx.net,
	marc.zyngier@arm.com, robh+dt@kernel.org,
	Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-arch@vger.kernel.org, iommu@lists.linux-foundation.org,
	linux-mm@kvack.org, linux-riscv@lists.infradead.org,
	Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linux-s390@vger.kernel.org, f.fainelli@gmail.com,
	Vasily Gorbik <gor@linux.ibm.com>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	frowand.list@gmail.com, linuxppc-dev@lists.ozlabs.org,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	linux-kernel@vger.kernel.org, eric@anholt.net, mbrugger@suse.com,
	Paul Mackerras <paulus@samba.org>,
	linux-rpi-kernel@lists.infradead.org,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	akpm@linux-foundation.org, will@kernel.org,
	nsaenzjulienne@suse.de
Subject: Re: [PATCH v2 09/11] dma-direct: turn ARCH_ZONE_DMA_BITS into a variable
Date: Mon, 26 Aug 2019 21:33:51 +1000
Message-ID: <87ef1840v4.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20190820145821.27214-10-nsaenzjulienne@suse.de>

Nicolas Saenz Julienne <nsaenzjulienne@suse.de> writes:
> diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
> index 0d52f57fca04..73668a21ae78 100644
> --- a/arch/powerpc/include/asm/page.h
> +++ b/arch/powerpc/include/asm/page.h
> @@ -319,13 +319,4 @@ struct vm_area_struct;
>  #endif /* __ASSEMBLY__ */
>  #include <asm/slice.h>
>  
> -/*
> - * Allow 30-bit DMA for very limited Broadcom wifi chips on many powerbooks.

This comment got lost.

> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
> index 9191a66b3bc5..2a69f87585df 100644
> --- a/arch/powerpc/mm/mem.c
> +++ b/arch/powerpc/mm/mem.c
> @@ -237,9 +238,14 @@ void __init paging_init(void)
>  	printk(KERN_DEBUG "Memory hole size: %ldMB\n",
>  	       (long int)((top_of_ram - total_ram) >> 20));
>  
> +	if (IS_ENABLED(CONFIG_PPC32))

Can you please propagate it here?

> +		zone_dma_bits = 30;
> +	else
> +		zone_dma_bits = 31;
> +

cheers
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  parent reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-20 14:58 [PATCH v2 00/11] Raspberry Pi 4 DMA addressing support Nicolas Saenz Julienne
2019-08-20 14:58 ` [PATCH v2 01/11] asm-generic: add dma_zone_size Nicolas Saenz Julienne
2019-08-26  7:09   ` Christoph Hellwig
2019-08-26 13:46     ` Nicolas Saenz Julienne
2019-08-28  9:44       ` Nicolas Saenz Julienne
2019-08-30 14:45       ` Catalin Marinas
2019-08-30 17:24         ` Nicolas Saenz Julienne
2019-09-02 13:01           ` Christoph Hellwig
2019-08-20 14:58 ` [PATCH v2 02/11] arm: use generic dma_zone_size Nicolas Saenz Julienne
2019-08-20 14:58 ` [PATCH v2 03/11] of/fdt: add of_fdt_machine_is_compatible function Nicolas Saenz Julienne
2019-08-20 17:16   ` Rob Herring
2019-08-20 17:27     ` Nicolas Saenz Julienne
2019-08-20 14:58 ` [PATCH v2 04/11] of/fdt: add early_init_dt_get_dma_zone_size() Nicolas Saenz Julienne
2019-08-20 17:14   ` Rob Herring
2019-08-20 14:58 ` [PATCH v2 05/11] arm64: mm: use arm64_dma_phys_limit instead of calling max_zone_dma_phys() Nicolas Saenz Julienne
2019-08-20 14:58 ` [PATCH v2 06/11] arm64: rename variables used to calculate ZONE_DMA32's size Nicolas Saenz Julienne
2019-08-20 14:58 ` [PATCH v2 07/11] arm64: re-introduce max_zone_dma_phys() Nicolas Saenz Julienne
2019-08-20 14:58 ` [PATCH v2 08/11] arm64: use both ZONE_DMA and ZONE_DMA32 Nicolas Saenz Julienne
2019-08-20 14:58 ` [PATCH v2 09/11] dma-direct: turn ARCH_ZONE_DMA_BITS into a variable Nicolas Saenz Julienne
2019-08-26  7:05   ` Christoph Hellwig
2019-08-26 11:33   ` Michael Ellerman [this message]
2019-08-20 14:58 ` [PATCH v2 10/11] arm64: edit zone_dma_bits to fine tune dma-direct min mask Nicolas Saenz Julienne
2019-08-26  7:06   ` Christoph Hellwig
2019-08-26 11:08     ` Nicolas Saenz Julienne
2019-08-27  7:03       ` Petr Tesarik
2019-08-20 14:58 ` [PATCH v2 11/11] mm: refresh ZONE_DMA and ZONE_DMA32 comments in 'enum zone_type' Nicolas Saenz Julienne
2019-08-26  7:07   ` Christoph Hellwig

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