linux-kernel - Re: [PATCH 1/2] PCI: controller: thunder: fix compile testing

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Date:   Thu, 25 Feb 2021 09:44:12 -0800
From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Arnd Bergmann <arnd@...nel.org>, Robert Richter <rric@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Rob Herring <robh@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Sean V Kelley <sean.v.kelley@...el.com>,
        Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
        "David E. Box" <david.e.box@...ux.intel.com>,
        Yicong Yang <yangyicong@...ilicon.com>,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] PCI: controller: thunder: fix compile testing



On 2/25/21 6:37 AM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Compile-testing these drivers is currently broken. Enabling
> it causes a couple of build failures though:
> 
> drivers/pci/controller/pci-thunder-ecam.c:119:30: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
> drivers/pci/controller/pci-thunder-pem.c:54:2: error: implicit declaration of function 'writeq' [-Werror,-Wimplicit-function-declaration]
> drivers/pci/controller/pci-thunder-pem.c:392:8: error: implicit declaration of function 'acpi_get_rc_resources' [-Werror,-Wimplicit-function-declaration]
> 
> Fix them with the obvious one-line changes.
Looks good to me.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/pci/controller/pci-thunder-ecam.c |  2 +-
>   drivers/pci/controller/pci-thunder-pem.c  | 13 +++++++------
>   drivers/pci/pci.h                         |  6 ++++++
>   3 files changed, 14 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pci/controller/pci-thunder-ecam.c b/drivers/pci/controller/pci-thunder-ecam.c
> index f964fd26f7e0..ffd84656544f 100644
> --- a/drivers/pci/controller/pci-thunder-ecam.c
> +++ b/drivers/pci/controller/pci-thunder-ecam.c
> @@ -116,7 +116,7 @@ static int thunder_ecam_p2_config_read(struct pci_bus *bus, unsigned int devfn,
>   	 * the config space access window.  Since we are working with
>   	 * the high-order 32 bits, shift everything down by 32 bits.
>   	 */
> -	node_bits = (cfg->res.start >> 32) & (1 << 12);
> +	node_bits = upper_32_bits(cfg->res.start) & (1 << 12);
>   
>   	v |= node_bits;
>   	set_val(v, where, size, val);
> diff --git a/drivers/pci/controller/pci-thunder-pem.c b/drivers/pci/controller/pci-thunder-pem.c
> index 1a3f70ac61fc..0660b9da204f 100644
> --- a/drivers/pci/controller/pci-thunder-pem.c
> +++ b/drivers/pci/controller/pci-thunder-pem.c
> @@ -12,6 +12,7 @@
>   #include <linux/pci-acpi.h>
>   #include <linux/pci-ecam.h>
>   #include <linux/platform_device.h>
> +#include <linux/io-64-nonatomic-lo-hi.h>
>   #include "../pci.h"
>   
>   #if defined(CONFIG_PCI_HOST_THUNDER_PEM) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))
> @@ -324,9 +325,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
>   	 * structure here for the BAR.
>   	 */
>   	bar4_start = res_pem->start + 0xf00000;
> -	pem_pci->ea_entry[0] = (u32)bar4_start | 2;
> -	pem_pci->ea_entry[1] = (u32)(res_pem->end - bar4_start) & ~3u;
> -	pem_pci->ea_entry[2] = (u32)(bar4_start >> 32);
> +	pem_pci->ea_entry[0] = lower_32_bits(bar4_start) | 2;
> +	pem_pci->ea_entry[1] = lower_32_bits(res_pem->end - bar4_start) & ~3u;
> +	pem_pci->ea_entry[2] = upper_32_bits(bar4_start);
>   
>   	cfg->priv = pem_pci;
>   	return 0;
> @@ -334,9 +335,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
>   
>   #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
>   
> -#define PEM_RES_BASE		0x87e0c0000000UL
> -#define PEM_NODE_MASK		GENMASK(45, 44)
> -#define PEM_INDX_MASK		GENMASK(26, 24)
> +#define PEM_RES_BASE		0x87e0c0000000ULL
> +#define PEM_NODE_MASK		GENMASK_ULL(45, 44)
> +#define PEM_INDX_MASK		GENMASK_ULL(26, 24)
>   #define PEM_MIN_DOM_IN_NODE	4
>   #define PEM_MAX_DOM_IN_NODE	10
>   
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 0a2b6d993fe1..022c2f433676 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -625,6 +625,12 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
>   #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
>   int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
>   			  struct resource *res);
> +#else
> +static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
> +					u16 segment, struct resource *res)
> +{
> +	return -ENODEV;
> +}
>   #endif
>   
>   int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
> 

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer