linux-kernel - Re: [PATCH V4 1/2] PCI: dwc: Add API support to de-initialize host

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Message-ID: <011b52b6-9fcd-8930-1313-6b546226c7b9@nvidia.com>
Date:   Fri, 7 Jun 2019 18:43:07 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
CC:     <jingoohan1@...il.com>, <gustavo.pimentel@...opsys.com>,
        <bhelgaas@...gle.com>, <Jisheng.Zhang@...aptics.com>,
        <thierry.reding@...il.com>, <linux-pci@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>, <sagar.tv@...il.com>
Subject: Re: [PATCH V4 1/2] PCI: dwc: Add API support to de-initialize host

On 5/27/2019 4:39 PM, Vidya Sagar wrote:
> On 5/7/2019 12:25 PM, Vidya Sagar wrote:
>> On 5/7/2019 11:19 AM, Vidya Sagar wrote:
>>> On 5/3/2019 4:53 PM, Lorenzo Pieralisi wrote:
>>>> On Thu, May 02, 2019 at 10:34:25PM +0530, Vidya Sagar wrote:
>>>>> Add an API to group all the tasks to be done to de-initialize host which
>>>>> can then be called by any DesignWare core based driver implementations
>>>>> while adding .remove() support in their respective drivers.
>>>>>
>>>>> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
>>>>> Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
>>>>> ---
>>>>> Changes from v3:
>>>>> * Added check if (pci_msi_enabled() && !pp->ops->msi_host_init) before calling
>>>>>    dw_pcie_free_msi() API to mimic init path
>>>>>
>>>>> Changes from v2:
>>>>> * Rebased on top of linux-next top of the tree branch
>>>>>
>>>>> Changes from v1:
>>>>> * s/Designware/DesignWare
>>>>>
>>>>>   drivers/pci/controller/dwc/pcie-designware-host.c | 8 ++++++++
>>>>>   drivers/pci/controller/dwc/pcie-designware.h      | 5 +++++
>>>>>   2 files changed, 13 insertions(+)
>>>>
>>>> Series doesn't apply to v5.1-rc1, what's based on ? I suspect
>>>> there is a dependency on pci/keystone, given the tight timeline
>>>> for the merge window, would you mind postponing it to v5.3 ?
>>>>
>>>> I do not think it is urgent, I am happy to create a branch
>>>> for it as soon as v5.2-rc1 is released.
>>> I rebased my changes on top of linux-next. I see that they have conflicts
>>> on top of v5.1-rc1. Do you want me to rebase them on top of v5.1-rc1 instead
>>> of linux-next?
>>> I'm fine with v5.2-rc1 as well.I forgot to mention that these changes are made on top of Jisheng's patches
>> FWIW, Jisheng's patches are approved and applied to pci/dwc for v5.2
>> https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1968324.html
> 
> Hi Lorenzo,
> Now that v5.2-rc2 is also available, could you please pick up this series?
> 
> Thanks,
> Vidya Sagar
> 
Hi Bjorn / Lorenzo,
Can you please pick up these two patches?

Thanks,
Vidya Sagar

>>
>>>
>>>>
>>>> Thanks,
>>>> Lorenzo
>>>>
>>>>> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
>>>>> index 77db32529319..d069e4290180 100644
>>>>> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
>>>>> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
>>>>> @@ -496,6 +496,14 @@ int dw_pcie_host_init(struct pcie_port *pp)
>>>>>       return ret;
>>>>>   }
>>>>> +void dw_pcie_host_deinit(struct pcie_port *pp)
>>>>> +{
>>>>> +    pci_stop_root_bus(pp->root_bus);
>>>>> +    pci_remove_root_bus(pp->root_bus);
>>>>> +    if (pci_msi_enabled() && !pp->ops->msi_host_init)
>>>>> +        dw_pcie_free_msi(pp);
>>>>> +}
>>>>> +
>>>>>   static int dw_pcie_access_other_conf(struct pcie_port *pp, struct pci_bus *bus,
>>>>>                        u32 devfn, int where, int size, u32 *val,
>>>>>                        bool write)
>>>>> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
>>>>> index deab426affd3..4f48ec78c7b9 100644
>>>>> --- a/drivers/pci/controller/dwc/pcie-designware.h
>>>>> +++ b/drivers/pci/controller/dwc/pcie-designware.h
>>>>> @@ -348,6 +348,7 @@ void dw_pcie_msi_init(struct pcie_port *pp);
>>>>>   void dw_pcie_free_msi(struct pcie_port *pp);
>>>>>   void dw_pcie_setup_rc(struct pcie_port *pp);
>>>>>   int dw_pcie_host_init(struct pcie_port *pp);
>>>>> +void dw_pcie_host_deinit(struct pcie_port *pp);
>>>>>   int dw_pcie_allocate_domains(struct pcie_port *pp);
>>>>>   #else
>>>>>   static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
>>>>> @@ -372,6 +373,10 @@ static inline int dw_pcie_host_init(struct pcie_port *pp)
>>>>>       return 0;
>>>>>   }
>>>>> +static inline void dw_pcie_host_deinit(struct pcie_port *pp)
>>>>> +{
>>>>> +}
>>>>> +
>>>>>   static inline int dw_pcie_allocate_domains(struct pcie_port *pp)
>>>>>   {
>>>>>       return 0;
>>>>> -- 
>>>>> 2.17.1
>>>>>
>>>
>>
>