linux-kernel - Re: [PATCH 01/11] RISC-V: drivers/iommu: Add RISC-V IOMMU

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Date: Sat, 13 Apr 2024 18:15:05 +0800
From: Xingyou Chen <rockrush@...kwork.org>
To: Tomasz Jeznach <tjeznach@...osinc.com>, Joerg Roedel <joro@...tes.org>,
 Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
 Paul Walmsley <paul.walmsley@...ive.com>
Cc: Anup Patel <apatel@...tanamicro.com>, Albert Ou <aou@...s.berkeley.edu>,
 linux@...osinc.com, linux-kernel@...r.kernel.org,
 Sebastien Boeuf <seb@...osinc.com>, iommu@...ts.linux.dev,
 Palmer Dabbelt <palmer@...belt.com>, Nick Kossifidis <mick@....forth.gr>,
 linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 01/11] RISC-V: drivers/iommu: Add RISC-V IOMMU - Ziommu
 support.


On 7/20/23 03:33, Tomasz Jeznach wrote:
> ... > +#endif /* _RISCV_IOMMU_BITS_H_ */
> diff --git a/drivers/iommu/riscv/iommu-pci.c b/drivers/iommu/riscv/iommu-pci.c
> new file mode 100644
> index 000000000000..c91f963d7a29
> --- /dev/null
> +++ b/drivers/iommu/riscv/iommu-pci.c
> @@ -0,0 +1,134 @@
> ...
> +
> +static struct pci_driver riscv_iommu_pci_driver = {
> +	.name = KBUILD_MODNAME,
> +	.id_table = riscv_iommu_pci_tbl,
> +	.probe = riscv_iommu_pci_probe,
> +	.remove = riscv_iommu_pci_remove,
> +	.driver = {
> +		   .pm = pm_sleep_ptr(&riscv_iommu_pm_ops),
> +		   .of_match_table = riscv_iommu_of_match,
> +		   },
> +};
> +
> +module_driver(riscv_iommu_pci_driver, pci_register_driver, pci_unregister_driver);

There's helper macro to be considered, and not forced to:
   module_pci_driver(riscv_iommu_pci_driver);

> diff --git a/drivers/iommu/riscv/iommu-platform.c b/drivers/iommu/riscv/iommu-platform.c
> new file mode 100644
> index 000000000000..e4e8ca6711e7
> --- /dev/null
> +++ b/drivers/iommu/riscv/iommu-platform.c
> @@ -0,0 +1,94 @@
> ...
> +
> +static struct platform_driver riscv_iommu_platform_driver = {
> +	.driver = {
> +		   .name = "riscv,iommu",
> +		   .of_match_table = riscv_iommu_of_match,
> +		   .suppress_bind_attrs = true,
> +		   },
> +	.probe = riscv_iommu_platform_probe,
> +	.remove_new = riscv_iommu_platform_remove,
> +	.shutdown = riscv_iommu_platform_shutdown,
> +};
> +
> +module_driver(riscv_iommu_platform_driver, platform_driver_register,
> +	      platform_driver_unregister);

And also:
   module_platform_driver(riscv_iommu_platform_driver);