linux-kernel - Re: [PATCH RESEND v5 14/18] PCI: dwc: Move io_cfg_atu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 28 Jun 2022 12:14:49 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Frank Li <Frank.Li@....com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND v5 14/18] PCI: dwc: Move io_cfg_atu_shared to the
 Root Port descriptor

On Fri, Jun 24, 2022 at 05:34:24PM +0300, Serge Semin wrote:
> That flag is set if there is an outbound iATU window used for both PCIe
> peripheral config-space accesses and IO ports transfers. Since the flag
> semantic is purely Root Port specific, it's unused in neither the DW PCIe
> common code nor in the DW PCIe Endpoint driver, we can freely move it to
> the DW PCIe Root Port descriptor. Thus the pcie_port structure will be
> more coherent.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>

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

Thanks,
Mani

> Reviewed-by: Rob Herring <robh@...nel.org>
> 
> ---
> 
> Changelog v4:
> - This is a new patch created on the v4 lap of the series.
> ---
>  drivers/pci/controller/dwc/pcie-designware-host.c | 6 +++---
>  drivers/pci/controller/dwc/pcie-designware.h      | 2 +-
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index c49a3bde7a2a..7ff2b7555b91 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -492,7 +492,7 @@ static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn,
>  
>  	ret = pci_generic_config_read(bus, devfn, where, size, val);
>  
> -	if (!ret && pci->io_cfg_atu_shared)
> +	if (!ret && pp->cfg0_io_shared)
>  		dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, pp->io_base,
>  					  pp->io_bus_addr, pp->io_size);
>  
> @@ -508,7 +508,7 @@ static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn,
>  
>  	ret = pci_generic_config_write(bus, devfn, where, size, val);
>  
> -	if (!ret && pci->io_cfg_atu_shared)
> +	if (!ret && pp->cfg0_io_shared)
>  		dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, pp->io_base,
>  					  pp->io_bus_addr, pp->io_size);
>  
> @@ -627,7 +627,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
>  							  PCIE_ATU_TYPE_IO, pp->io_base,
>  							  pp->io_bus_addr, pp->io_size);
>  			else
> -				pci->io_cfg_atu_shared = true;
> +				pp->cfg0_io_shared = true;
>  		}
>  
>  		if (pci->num_ob_windows <= atu_idx)
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 8ba239292634..13bffa3eaed6 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -179,6 +179,7 @@ struct dw_pcie_host_ops {
>  
>  struct pcie_port {
>  	bool			has_msi_ctrl:1;
> +	bool			cfg0_io_shared:1;
>  	u64			cfg0_base;
>  	void __iomem		*va_cfg0_base;
>  	u32			cfg0_size;
> @@ -274,7 +275,6 @@ struct dw_pcie {
>  	int			link_gen;
>  	u8			n_fts[2];
>  	bool			iatu_unroll_enabled: 1;
> -	bool			io_cfg_atu_shared: 1;
>  };
>  
>  #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
> -- 
> 2.35.1
> 

-- 
மணிவண்ணன் சதாசிவம்