Re: [Xen-devel] [PATCH v3 22/27] s390/MSI: Use MSI chip framework to configure MSI/MSI-X irq

[Yijing Wang <wangyijing@xxxxxxxxxx>]

On 2014/10/16 20:13, Sebastian Ott wrote:
> On Wed, 15 Oct 2014, Yijing Wang wrote:
>> Use MSI chip framework instead of arch MSI functions to configure
>> MSI/MSI-X irq. So we can manage MSI/MSI-X irq in a unified framework.
>>
>> Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
>> ---
>> Hi Sebastian,
>>    I dropped the Acked-by , because this version has a
>> lot changes compared to last. So, I guess you may want to check it again.
> 
> I did and I agree with that one too.

Thanks very much!

Thanks!
Yijing.

> 
> Regards,
> Sebastian
> 
>> ---
>>  arch/s390/include/asm/pci.h |    9 +++++++++
>>  arch/s390/pci/pci.c         |   12 ++++++++++--
>>  2 files changed, 19 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
>> index c030900..4d41f08 100644
>> --- a/arch/s390/include/asm/pci.h
>> +++ b/arch/s390/include/asm/pci.h
>> @@ -88,6 +88,8 @@ struct zpci_dev {
>>      u32 uid;                        /* user defined id */
>>      u8 util_str[CLP_UTIL_STR_LEN];  /* utility string */
>>
>> +    struct msi_chip *msi_chip;
>> +
>>      /* IRQ stuff */
>>      u64             msi_addr;       /* MSI address */
>>      struct airq_iv *aibv;           /* adapter interrupt bit vector */
>> @@ -121,6 +123,13 @@ struct zpci_dev {
>>      struct dentry   *debugfs_perf;
>>  };
>>
>> +static inline struct msi_chip *pci_msi_chip(struct pci_bus *bus)
>> +{
>> +    struct zpci_dev *zpci = bus->sysdata;
>> +
>> +    return zpci->msi_chip;
>> +}
>> +
>>  static inline bool zdev_enabled(struct zpci_dev *zdev)
>>  {
>>      return (zdev->fh & (1UL << 31)) ? true : false;
>> diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
>> index 552b990..bf6732f 100644
>> --- a/arch/s390/pci/pci.c
>> +++ b/arch/s390/pci/pci.c
>> @@ -358,7 +358,8 @@ static void zpci_irq_handler(struct airq_struct *airq)
>>      }
>>  }
>>
>> -int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
>> +static int zpci_setup_msi_irqs(struct msi_chip *chip,
>> +            struct pci_dev *pdev, int nvec, int type)
>>  {
>>      struct zpci_dev *zdev = get_zdev(pdev);
>>      unsigned int hwirq, msi_vecs;
>> @@ -434,7 +435,8 @@ out:
>>      return rc;
>>  }
>>
>> -void arch_teardown_msi_irqs(struct pci_dev *pdev)
>> +static void zpci_teardown_msi_irqs(struct msi_chip *chip,
>> +            struct pci_dev *pdev)
>>  {
>>      struct zpci_dev *zdev = get_zdev(pdev);
>>      struct msi_desc *msi;
>> @@ -464,6 +466,11 @@ void arch_teardown_msi_irqs(struct pci_dev *pdev)
>>      airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
>>  }
>>
>> +static struct msi_chip zpci_msi_chip = {
>> +    .setup_irqs = zpci_setup_msi_irqs,
>> +    .teardown_irqs = zpci_teardown_msi_irqs,
>> +};
>> +
>>  static void zpci_map_resources(struct zpci_dev *zdev)
>>  {
>>      struct pci_dev *pdev = zdev->pdev;
>> @@ -749,6 +756,7 @@ static int zpci_scan_bus(struct zpci_dev *zdev)
>>      if (ret)
>>              return ret;
>>
>> +    zdev->msi_chip = &zpci_msi_chip;
>>      zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
>>                                    zdev, &resources);
>>      if (!zdev->bus) {
>> -- 
>> 1.7.1
>>
>>
> 
> 
> .
> 


-- 
Thanks!
Yijing


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