linux-kernel - Re: [PATCH V6 2/3] PCI: vmd: Add vmd_device

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Date:   Fri, 26 Aug 2022 11:15:24 +0200
From:   Lorenzo Pieralisi <lpieralisi@...nel.org>
To:     "David E. Box" <david.e.box@...ux.intel.com>
Cc:     nirmal.patel@...ux.intel.com, jonathan.derrick@...ux.dev,
        lorenzo.pieralisi@....com, hch@...radead.org, kw@...ux.com,
        robh@...nel.org, bhelgaas@...gle.com,
        michael.a.bottini@...ux.intel.com, rafael@...nel.org,
        me@...ityamohan.in, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V6 2/3] PCI: vmd: Add vmd_device_data

On Mon, Feb 28, 2022 at 08:19:42PM -0800, David E. Box wrote:
> Add vmd_device_data to allow adding additional info for driver data. Also
> refactor the PCI ID list to use PCI_VDEVICE.

I think this must be two patches, (1) conversion to PCI_VDEVICE
and (2) vmd_device_data.

Thanks,
Lorenzo

> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> ---
>  V6
>    - Inline the declarations for driver data in the vmd_ids list.
>      Suggested by Jonathan
>  V5
>    - New patch
> 
>  drivers/pci/controller/vmd.c | 76 ++++++++++++++++++++++++------------
>  1 file changed, 50 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
> index cc166c683638..cde6e2cba210 100644
> --- a/drivers/pci/controller/vmd.c
> +++ b/drivers/pci/controller/vmd.c
> @@ -69,6 +69,10 @@ enum vmd_features {
>  	VMD_FEAT_CAN_BYPASS_MSI_REMAP		= (1 << 4),
>  };
>  
> +struct vmd_device_data {
> +	enum vmd_features features;
> +};
> +
>  static DEFINE_IDA(vmd_instance_ida);
>  
>  /*
> @@ -710,11 +714,12 @@ static void vmd_copy_host_bridge_flags(struct pci_host_bridge *root_bridge,
>  	vmd_bridge->native_dpc = root_bridge->native_dpc;
>  }
>  
> -static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
> +static int vmd_enable_domain(struct vmd_dev *vmd, struct vmd_device_data *info)
>  {
>  	struct pci_sysdata *sd = &vmd->sysdata;
>  	struct resource *res;
>  	u32 upper_bits;
> +	unsigned long features = info->features;
>  	unsigned long flags;
>  	LIST_HEAD(resources);
>  	resource_size_t offset[2] = {0};
> @@ -881,7 +886,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
>  
>  static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id)
>  {
> -	unsigned long features = (unsigned long) id->driver_data;
> +	struct vmd_device_data *info = (struct vmd_device_data *)id->driver_data;
> +	unsigned long features = info->features;
>  	struct vmd_dev *vmd;
>  	int err;
>  
> @@ -925,7 +931,7 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id)
>  
>  	spin_lock_init(&vmd->cfg_lock);
>  	pci_set_drvdata(dev, vmd);
> -	err = vmd_enable_domain(vmd, features);
> +	err = vmd_enable_domain(vmd, info);
>  	if (err)
>  		goto out_release_instance;
>  
> @@ -994,29 +1000,47 @@ static int vmd_resume(struct device *dev)
>  static SIMPLE_DEV_PM_OPS(vmd_dev_pm_ops, vmd_suspend, vmd_resume);
>  
>  static const struct pci_device_id vmd_ids[] = {
> -	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_201D),
> -		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP,},
> -	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0),
> -		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW |
> -				VMD_FEAT_HAS_BUS_RESTRICTIONS |
> -				VMD_FEAT_CAN_BYPASS_MSI_REMAP,},
> -	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x467f),
> -		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> -				VMD_FEAT_HAS_BUS_RESTRICTIONS |
> -				VMD_FEAT_OFFSET_FIRST_VECTOR,},
> -	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4c3d),
> -		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> -				VMD_FEAT_HAS_BUS_RESTRICTIONS |
> -				VMD_FEAT_OFFSET_FIRST_VECTOR,},
> -	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa77f),
> -		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> -				VMD_FEAT_HAS_BUS_RESTRICTIONS |
> -				VMD_FEAT_OFFSET_FIRST_VECTOR,},
> -	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B),
> -		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> -				VMD_FEAT_HAS_BUS_RESTRICTIONS |
> -				VMD_FEAT_OFFSET_FIRST_VECTOR,},
> -	{0,}
> +	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_201D),
> +		(kernel_ulong_t)&(struct vmd_device_data) {
> +			.features = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP,
> +		},
> +	},
> +	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0),
> +		(kernel_ulong_t)&(struct vmd_device_data) {
> +			.features = VMD_FEAT_HAS_MEMBAR_SHADOW |
> +				    VMD_FEAT_HAS_BUS_RESTRICTIONS |
> +				    VMD_FEAT_CAN_BYPASS_MSI_REMAP,
> +		},
> +	},
> +	{ PCI_VDEVICE(INTEL, 0x467f),
> +		(kernel_ulong_t)&(struct vmd_device_data) {
> +			.features = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> +				    VMD_FEAT_HAS_BUS_RESTRICTIONS |
> +				    VMD_FEAT_OFFSET_FIRST_VECTOR,
> +		},
> +	},
> +	{ PCI_VDEVICE(INTEL, 0x4c3d),
> +		(kernel_ulong_t)&(struct vmd_device_data) {
> +			.features = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> +				    VMD_FEAT_HAS_BUS_RESTRICTIONS |
> +				    VMD_FEAT_OFFSET_FIRST_VECTOR,
> +		},
> +	},
> +	{ PCI_VDEVICE(INTEL, 0xa77f),
> +		(kernel_ulong_t)&(struct vmd_device_data) {
> +			.features = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> +				    VMD_FEAT_HAS_BUS_RESTRICTIONS |
> +				    VMD_FEAT_OFFSET_FIRST_VECTOR,
> +		},
> +	},
> +	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B),
> +		(kernel_ulong_t)&(struct vmd_device_data) {
> +			.features = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
> +				    VMD_FEAT_HAS_BUS_RESTRICTIONS |
> +				    VMD_FEAT_OFFSET_FIRST_VECTOR,
> +		},
> +	},
> +	{ }
>  };
>  MODULE_DEVICE_TABLE(pci, vmd_ids);
>  
> -- 
> 2.25.1
> 
>