Re: [PATCH v2 23/23] iommu/pages: Remove iommu_alloc_pages_node()

[Baolu Lu <baolu.lu@linux.intel.com>]

On 2/15/25 01:07, Jason Gunthorpe wrote:
> diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
> index dd980808998da9..1036ed0d899472 100644
> --- a/drivers/iommu/intel/iommu.h
> +++ b/drivers/iommu/intel/iommu.h
> @@ -493,14 +493,13 @@ struct q_inval {
>   
>   /* Page Request Queue depth */
>   #define PRQ_ORDER	4
> -#define PRQ_RING_MASK	((0x1000 << PRQ_ORDER) - 0x20)
> -#define PRQ_DEPTH	((0x1000 << PRQ_ORDER) >> 5)
> +#define PRQ_SIZE	(SZ_4K << PRQ_ORDER)
> +#define PRQ_RING_MASK	(PRQ_SIZE - 0x20)
> +#define PRQ_DEPTH	(PRQ_SIZE >> 5)
>   
>   struct dmar_pci_notify_info;
>   
>   #ifdef CONFIG_IRQ_REMAP
> -/* 1MB - maximum possible interrupt remapping table size */

Can we keep this line of comment,

and move it ...

> -#define INTR_REMAP_PAGE_ORDER	8
>   #define INTR_REMAP_TABLE_REG_SIZE	0xf
>   #define INTR_REMAP_TABLE_REG_SIZE_MASK  0xf
>   
> diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
> index d6b796f8f100cd..735e26498ee9f2 100644
> --- a/drivers/iommu/intel/irq_remapping.c
> +++ b/drivers/iommu/intel/irq_remapping.c
> @@ -538,11 +538,10 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu)
>   	if (!ir_table)
>   		return -ENOMEM;
>   
> -	ir_table_base = iommu_alloc_pages_node(iommu->node, GFP_KERNEL,
> -					       INTR_REMAP_PAGE_ORDER);
> +	ir_table_base =

... here?

> +		iommu_alloc_pages_node_sz(iommu->node, GFP_KERNEL, SZ_1M);
>   	if (!ir_table_base) {
> -		pr_err("IR%d: failed to allocate pages of order %d\n",
> -		       iommu->seq_id, INTR_REMAP_PAGE_ORDER);
> +		pr_err("IR%d: failed to allocate 1M of pages\n", iommu->seq_id);
>   		goto out_free_table;
>   	}

Thanks,
baolu