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

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Message-ID: <8a6696e0-fc53-2e6b-536b-d1d2668e0f21@nvidia.com>
Date:   Thu, 13 Jun 2019 23:54:26 +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 6/7/2019 6:43 PM, Vidya Sagar wrote:
> 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
Apologies for pinging again. These two patches can be applied directly on top of
v5.2-rc4. Please do let me know if there is anything required from my side.

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
>>>>>>
>>>>
>>>
>>
>