linux-kernel - Re: [PATCH v3 06/13] PCI: apple: Dynamically allocate RID-to

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Message-ID: <vcoczq6foe3mikun3o5oqhawbu6ixfjfljnare32olmwxw63xj@zznl6iefhhxu>
Date: Sun, 13 Apr 2025 22:37:39 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Marc Zyngier <maz@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, asahi@...ts.linux.dev, 
	Alyssa Rosenzweig <alyssa@...enzweig.io>, Janne Grunau <j@...nau.net>, Hector Martin <marcan@...can.st>, 
	Sven Peter <sven@...npeter.dev>, Bjorn Helgaas <bhelgaas@...gle.com>, 
	Lorenzo Pieralisi <lpieralisi@...nel.org>, Krzysztof Wilczyński <kw@...ux.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Mark Kettenis <mark.kettenis@...all.nl>
Subject: Re: [PATCH v3 06/13] PCI: apple: Dynamically allocate RID-to_SID
 bitmap

On Tue, Apr 01, 2025 at 10:17:06AM +0100, Marc Zyngier wrote:
> As we move towards supporting SoCs with varying RID-to-SID mapping
> capabilities, turn the static SID tracking bitmap into a dynamically
> allocated one. The current allocation size is still the same, but
> that's about to change.
> 
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> Acked-by: Alyssa Rosenzweig <alyssa@...enzweig.io>
> Tested-by: Janne Grunau <j@...nau.net>
> Signed-off-by: Marc Zyngier <maz@...nel.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
>  drivers/pci/controller/pcie-apple.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
> index d07e488051290..6d3aa186d9c5f 100644
> --- a/drivers/pci/controller/pcie-apple.c
> +++ b/drivers/pci/controller/pcie-apple.c
> @@ -147,7 +147,7 @@ struct apple_pcie_port {
>  	void __iomem		*base;
>  	struct irq_domain	*domain;
>  	struct list_head	entry;
> -	DECLARE_BITMAP(sid_map, MAX_RID2SID);
> +	unsigned long		*sid_map;
>  	int			sid_map_sz;
>  	int			idx;
>  };
> @@ -524,6 +524,10 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie,
>  	if (!port)
>  		return -ENOMEM;
>  
> +	port->sid_map = devm_bitmap_zalloc(pcie->dev, MAX_RID2SID, GFP_KERNEL);
> +	if (!port->sid_map)
> +		return -ENOMEM;
> +
>  	ret = of_property_read_u32_index(np, "reg", 0, &idx);
>  	if (ret)
>  		return ret;
> -- 
> 2.39.2
> 

-- 
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