linux-kernel - Re: [PATCH v2 12/27] cris: Use generic pci_mmap_resource

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Message-ID: <20170413073747.GA26295@axis.com>
Date:   Thu, 13 Apr 2017 09:37:47 +0200
From:   Jesper Nilsson <jesper.nilsson@...s.com>
To:     David Woodhouse <dwmw2@...radead.org>
Cc:     linux-pci@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 12/27] cris: Use generic pci_mmap_resource_range()

On Wed, Apr 12, 2017 at 01:26:01PM +0100, David Woodhouse wrote:
> From: David Woodhouse <dwmw@...zon.co.uk>
> 
> Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>

For the CRIS part:

Acked-by: Jesper Nilsson <jesper.nilsson@...s.com>

> ---
>  arch/cris/arch-v32/drivers/pci/bios.c | 23 -----------------------
>  arch/cris/include/asm/pci.h           |  1 +
>  2 files changed, 1 insertion(+), 23 deletions(-)
> 
> diff --git a/arch/cris/arch-v32/drivers/pci/bios.c b/arch/cris/arch-v32/drivers/pci/bios.c
> index a589686d..394c2a73 100644
> --- a/arch/cris/arch-v32/drivers/pci/bios.c
> +++ b/arch/cris/arch-v32/drivers/pci/bios.c
> @@ -14,29 +14,6 @@ void pcibios_set_master(struct pci_dev *dev)
>  	pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
>  }
>  
> -int pci_mmap_page_range(struct pci_dev *dev, int bar,
> -			struct vm_area_struct *vma,
> -			enum pci_mmap_state mmap_state, int write_combine)
> -{
> -	unsigned long prot;
> -
> -	/* Leave vm_pgoff as-is, the PCI space address is the physical
> -	 * address on this platform.
> -	 */
> -	prot = pgprot_val(vma->vm_page_prot);
> -	vma->vm_page_prot = __pgprot(prot);
> -
> -	/* Write-combine setting is ignored, it is changed via the mtrr
> -	 * interfaces on this platform.
> -	 */
> -	if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
> -			     vma->vm_end - vma->vm_start,
> -			     vma->vm_page_prot))
> -		return -EAGAIN;
> -
> -	return 0;
> -}
> -
>  resource_size_t
>  pcibios_align_resource(void *data, const struct resource *res,
>  		       resource_size_t size, resource_size_t align)
> diff --git a/arch/cris/include/asm/pci.h b/arch/cris/include/asm/pci.h
> index 65198cb..6e50533 100644
> --- a/arch/cris/include/asm/pci.h
> +++ b/arch/cris/include/asm/pci.h
> @@ -42,6 +42,7 @@ struct pci_dev;
>  #define PCI_DMA_BUS_IS_PHYS	(1)
>  
>  #define HAVE_PCI_MMAP
> +#define ARCH_GENERIC_PCI_MMAP_RESOURCE
>  
>  #endif /* __KERNEL__ */
>  
> -- 
> 2.9.3

/^JN - Jesper Nilsson
-- 
               Jesper Nilsson -- jesper.nilsson@...s.com