Subject: [RFC PATCH 11/11] x86/MSI: Refactor x86 MSI code

From: [email-masked] (Yijing Wang)
Date: Wed, 20 Aug 2014 15:01:06 +0800

On 2014/8/20 14:20, Bharat.Bhushan at freescale.com wrote:
> 
> 
>> -----Original Message-----
>> From: linux-pci-owner at vger.kernel.org [mailto:linux-pci-owner at vger.kernel.org]
>> On Behalf Of Yijing Wang
>> Sent: Saturday, July 26, 2014 8:39 AM
>> To: linux-kernel at vger.kernel.org
>> Cc: Xinwei Hu; Wuyun; Bjorn Helgaas; linux-pci at vger.kernel.org;
>> Paul.Mundt at huawei.com; James E.J. Bottomley; Marc Zyngier; linux-arm-
>> kernel at lists.infradead.org; Russell King; linux-arch at vger.kernel.org; Basu
>> Arnab-B45036; virtualization at lists.linux-foundation.org; Hanjun Guo; Yijing Wang
>> Subject: [RFC PATCH 11/11] x86/MSI: Refactor x86 MSI code
> 
> Please provide description about what this refactoring is? Also does other architecture also need similar refactoring ?

Sorry, I will update all description in my new proposal.

I provided another patchset to decouple MSI driver and arch MSI code,
link: http://marc.info/?l=linux-pci&m=140782732604433&w=2

Based that, there are few changes related to arch MSI code.

I will rebas the patchset based that~

> 
> Thanks
> -Bharat
> 
>>
>> Signed-off-by: Yijing Wang <[email-masked]>
>> ---
>>  arch/x86/include/asm/io_apic.h       |    2 +-
>>  arch/x86/include/asm/irq_remapping.h |    4 +-
>>  arch/x86/include/asm/pci.h           |    6 ++--
>>  arch/x86/include/asm/x86_init.h      |   10 +++---
>>  arch/x86/kernel/apic/io_apic.c       |   23 +++++++--------
>>  arch/x86/kernel/x86_init.c           |   12 ++++----
>>  drivers/iommu/amd_iommu.c            |   16 ++++++----
>>  drivers/iommu/intel_irq_remapping.c  |    9 ++++--
>>  drivers/iommu/irq_remapping.c        |   51 ++++++++++++++++-----------------
>>  drivers/iommu/irq_remapping.h        |    6 ++--
>>  drivers/msi/msi.c                    |    3 +-
>>  11 files changed, 72 insertions(+), 70 deletions(-)
>>
>> diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
>> index 90f97b4..692a90f 100644
>> --- a/arch/x86/include/asm/io_apic.h
>> +++ b/arch/x86/include/asm/io_apic.h
>> @@ -158,7 +158,7 @@ extern int native_setup_ioapic_entry(int, struct
>> IO_APIC_route_entry *,
>>  				     struct io_apic_irq_attr *);
>>  extern void eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg);
>>
>> -extern void native_compose_msi_msg(struct pci_dev *pdev,
>> +extern void native_compose_msi_msg(struct msi_irqs *msi,
>>  				   unsigned int irq, unsigned int dest,
>>  				   struct msi_msg *msg, u8 hpet_id);
>>  extern void native_eoi_ioapic_pin(int apic, int pin, int vector);
>> diff --git a/arch/x86/include/asm/irq_remapping.h
>> b/arch/x86/include/asm/irq_remapping.h
>> index b7747c4..a10003d 100644
>> --- a/arch/x86/include/asm/irq_remapping.h
>> +++ b/arch/x86/include/asm/irq_remapping.h
>> @@ -47,7 +47,7 @@ extern int setup_ioapic_remapped_entry(int irq,
>>  				       int vector,
>>  				       struct io_apic_irq_attr *attr);
>>  extern void free_remapped_irq(int irq);
>> -extern void compose_remapped_msi_msg(struct pci_dev *pdev,
>> +extern void compose_remapped_msi_msg(struct msi_irqs *msi,
>>  				     unsigned int irq, unsigned int dest,
>>  				     struct msi_msg *msg, u8 hpet_id);
>>  extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
>> @@ -77,7 +77,7 @@ static inline int setup_ioapic_remapped_entry(int irq,
>>  	return -ENODEV;
>>  }
>>  static inline void free_remapped_irq(int irq) { }
>> -static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
>> +static inline void compose_remapped_msi_msg(struct msi_irqs *msi,
>>  					    unsigned int irq, unsigned int dest,
>>  					    struct msi_msg *msg, u8 hpet_id)
>>  {
>> diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
>> index 0892ea0..04c9ef6 100644
>> --- a/arch/x86/include/asm/pci.h
>> +++ b/arch/x86/include/asm/pci.h
>> @@ -96,10 +96,10 @@ extern void pci_iommu_alloc(void);
>>  #ifdef CONFIG_PCI_MSI
>>  /* implemented in arch/x86/kernel/apic/io_apic. */
>>  struct msi_desc;
>> -int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
>> +int native_setup_msi_irqs(struct msi_irqs *msi, int nvec, int type);
>>  void native_teardown_msi_irq(unsigned int irq);
>> -void native_restore_msi_irqs(struct pci_dev *dev);
>> -int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
>> +void native_restore_msi_irqs(struct msi_irqs *msi);
>> +int setup_msi_irq(struct msi_irqs *msi, struct msi_desc *msidesc,
>>  		  unsigned int irq_base, unsigned int irq_offset);
>>  #else
>>  #define native_setup_msi_irqs		NULL
>> diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
>> index e45e4da..8e42f17 100644
>> --- a/arch/x86/include/asm/x86_init.h
>> +++ b/arch/x86/include/asm/x86_init.h
>> @@ -170,18 +170,18 @@ struct x86_platform_ops {
>>  	void (*apic_post_init)(void);
>>  };
>>
>> -struct pci_dev;
>> +struct msi_irqs;
>>  struct msi_msg;
>>  struct msi_desc;
>>
>>  struct x86_msi_ops {
>> -	int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
>> -	void (*compose_msi_msg)(struct pci_dev *dev, unsigned int irq,
>> +	int (*setup_msi_irqs)(struct msi_irqs *msi, int nvec, int type);
>> +	void (*compose_msi_msg)(struct msi_irqs *msi, unsigned int irq,
>>  				unsigned int dest, struct msi_msg *msg,
>>  			       u8 hpet_id);
>>  	void (*teardown_msi_irq)(unsigned int irq);
>> -	void (*teardown_msi_irqs)(struct pci_dev *dev);
>> -	void (*restore_msi_irqs)(struct pci_dev *dev);
>> +	void (*teardown_msi_irqs)(struct msi_irqs *msi);
>> +	void (*restore_msi_irqs)(struct msi_irqs *msi);
>>  	int  (*setup_hpet_msi)(unsigned int irq, unsigned int id);
>>  	u32 (*msi_mask_irq)(struct msi_desc *desc, u32 mask, u32 flag);
>>  	u32 (*msix_mask_irq)(struct msi_desc *desc, u32 flag);
>> diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
>> index b833042..3cb4a6a 100644
>> --- a/arch/x86/kernel/apic/io_apic.c
>> +++ b/arch/x86/kernel/apic/io_apic.c
>> @@ -2939,7 +2939,7 @@ void arch_teardown_hwirq(unsigned int irq)
>>  /*
>>   * MSI message composition
>>   */
>> -void native_compose_msi_msg(struct pci_dev *pdev,
>> +void native_compose_msi_msg(struct msi_irqs *msi,
>>  			    unsigned int irq, unsigned int dest,
>>  			    struct msi_msg *msg, u8 hpet_id)
>>  {
>> @@ -2970,7 +2970,7 @@ void native_compose_msi_msg(struct pci_dev *pdev,
>>  }
>>
>>  #ifdef CONFIG_PCI_MSI
>> -static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq,
>> +static int msi_compose_msg(struct msi_irqs *msi, unsigned int irq,
>>  			   struct msi_msg *msg, u8 hpet_id)
>>  {
>>  	struct irq_cfg *cfg;
>> @@ -2990,7 +2990,7 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned
>> int irq,
>>  	if (err)
>>  		return err;
>>
>> -	x86_msi.compose_msi_msg(pdev, irq, dest, msg, hpet_id);
>> +	x86_msi.compose_msi_msg(msi, irq, dest, msg, hpet_id);
>>
>>  	return 0;
>>  }
>> @@ -3032,15 +3032,16 @@ static struct irq_chip msi_chip = {
>>  	.irq_retrigger		= ioapic_retrigger_irq,
>>  };
>>
>> -int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
>> +int setup_msi_irq(struct msi_irqs *msi, struct msi_desc *msidesc,
>>  		  unsigned int irq_base, unsigned int irq_offset)
>>  {
>>  	struct irq_chip *chip = &msi_chip;
>>  	struct msi_msg msg;
>>  	unsigned int irq = irq_base + irq_offset;
>>  	int ret;
>> +	struct pci_dev *dev = msi->data;
>>
>> -	ret = msi_compose_msg(dev, irq, &msg, -1);
>> +	ret = msi_compose_msg(msi, irq, &msg, -1);
>>  	if (ret < 0)
>>  		return ret;
>>
>> @@ -3062,24 +3063,22 @@ int setup_msi_irq(struct pci_dev *dev, struct msi_desc
>> *msidesc,
>>  	return 0;
>>  }
>>
>> -int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
>> +int native_setup_msi_irqs(struct msi_irqs *msi, int nvec, int type)
>>  {
>>  	struct msi_desc *msidesc;
>>  	unsigned int irq;
>> -	int node, ret;
>> +	int ret;
>>
>>  	/* Multiple MSI vectors only supported with interrupt remapping */
>>  	if (type == MSI_TYPE && nvec > 1)
>>  		return 1;
>>
>> -	node = dev_to_node(&dev->dev);
>> -
>> -	list_for_each_entry(msidesc, &dev->msi_list, list) {
>> -		irq = irq_alloc_hwirq(node);
>> +	list_for_each_entry(msidesc, &msi->msi_list, list) {
>> +		irq = irq_alloc_hwirq(msi->node);
>>  		if (!irq)
>>  			return -ENOSPC;
>>
>> -		ret = setup_msi_irq(dev, msidesc, irq, 0);
>> +		ret = setup_msi_irq(msi, msidesc, irq, 0);
>>  		if (ret < 0) {
>>  			irq_free_hwirq(irq);
>>  			return ret;
>> diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
>> index e48b674..a277faf 100644
>> --- a/arch/x86/kernel/x86_init.c
>> +++ b/arch/x86/kernel/x86_init.c
>> @@ -121,14 +121,14 @@ struct x86_msi_ops x86_msi = {
>>  };
>>
>>  /* MSI arch specific hooks */
>> -int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
>> +int arch_setup_msi_irqs(struct msi_irqs *msi, int nvec, int type)
>>  {
>> -	return x86_msi.setup_msi_irqs(dev, nvec, type);
>> +	return x86_msi.setup_msi_irqs(msi, nvec, type);
>>  }
>>
>> -void arch_teardown_msi_irqs(struct pci_dev *dev)
>> +void arch_teardown_msi_irqs(struct msi_irqs *msi)
>>  {
>> -	x86_msi.teardown_msi_irqs(dev);
>> +	x86_msi.teardown_msi_irqs(msi);
>>  }
>>
>>  void arch_teardown_msi_irq(unsigned int irq)
>> @@ -136,9 +136,9 @@ void arch_teardown_msi_irq(unsigned int irq)
>>  	x86_msi.teardown_msi_irq(irq);
>>  }
>>
>> -void arch_restore_msi_irqs(struct pci_dev *dev)
>> +void arch_restore_msi_irqs(struct msi_irqs *msi)
>>  {
>> -	x86_msi.restore_msi_irqs(dev);
>> +	x86_msi.restore_msi_irqs(msi);
>>  }
>>  u32 arch_msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag)
>>  {
>> diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
>> index 4aec6a2..0e45cb7 100644
>> --- a/drivers/iommu/amd_iommu.c
>> +++ b/drivers/iommu/amd_iommu.c
>> @@ -4237,7 +4237,7 @@ static int free_irq(int irq)
>>  	return 0;
>>  }
>>
>> -static void compose_msi_msg(struct pci_dev *pdev,
>> +static void compose_msi_msg(struct msi_irqs *msi,
>>  			    unsigned int irq, unsigned int dest,
>>  			    struct msi_msg *msg, u8 hpet_id)
>>  {
>> @@ -4265,33 +4265,35 @@ static void compose_msi_msg(struct pci_dev *pdev,
>>  	msg->data       = irte_info->index;
>>  }
>>
>> -static int msi_alloc_irq(struct pci_dev *pdev, int irq, int nvec)
>> +static int msi_alloc_irq(struct msi_irqs *msi, int irq, int nvec)
>>  {
>>  	struct irq_cfg *cfg;
>>  	int index;
>>  	u16 devid;
>> +	struct pci_dev *dev = msi->data;
>>
>> -	if (!pdev)
>> +	if (!dev)
>>  		return -EINVAL;
>>
>>  	cfg = irq_get_chip_data(irq);
>>  	if (!cfg)
>>  		return -EINVAL;
>>
>> -	devid = get_device_id(&pdev->dev);
>> +	devid = get_device_id(&dev->dev);
>>  	index = alloc_irq_index(cfg, devid, nvec);
>>
>>  	return index < 0 ? MAX_IRQS_PER_TABLE : index;
>>  }
>>
>> -static int msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
>> +static int msi_setup_irq(struct msi_irqs *msi, unsigned int irq,
>>  			 int index, int offset)
>>  {
>>  	struct irq_2_irte *irte_info;
>>  	struct irq_cfg *cfg;
>>  	u16 devid;
>> +	struct pci_dev *dev = msi->data;
>>
>> -	if (!pdev)
>> +	if (!dev)
>>  		return -EINVAL;
>>
>>  	cfg = irq_get_chip_data(irq);
>> @@ -4301,7 +4303,7 @@ static int msi_setup_irq(struct pci_dev *pdev, unsigned
>> int irq,
>>  	if (index >= MAX_IRQS_PER_TABLE)
>>  		return 0;
>>
>> -	devid		= get_device_id(&pdev->dev);
>> +	devid		= get_device_id(&dev->dev);
>>  	irte_info	= &cfg->irq_2_irte;
>>
>>  	cfg->remapped	      = 1;
>> diff --git a/drivers/iommu/intel_irq_remapping.c
>> b/drivers/iommu/intel_irq_remapping.c
>> index 9b17489..d6bde63 100644
>> --- a/drivers/iommu/intel_irq_remapping.c
>> +++ b/drivers/iommu/intel_irq_remapping.c
>> @@ -1027,7 +1027,7 @@ intel_ioapic_set_affinity(struct irq_data *data, const
>> struct cpumask *mask,
>>  	return 0;
>>  }
>>
>> -static void intel_compose_msi_msg(struct pci_dev *pdev,
>> +static void intel_compose_msi_msg(struct msi_irqs *msi,
>>  				  unsigned int irq, unsigned int dest,
>>  				  struct msi_msg *msg, u8 hpet_id)
>>  {
>> @@ -1035,6 +1035,7 @@ static void intel_compose_msi_msg(struct pci_dev *pdev,
>>  	struct irte irte;
>>  	u16 sub_handle = 0;
>>  	int ir_index;
>> +	struct pci_dev *pdev = msi->data;
>>
>>  	cfg = irq_get_chip_data(irq);
>>
>> @@ -1064,10 +1065,11 @@ static void intel_compose_msi_msg(struct pci_dev *pdev,
>>   * and allocate 'nvec' consecutive interrupt-remapping table entries
>>   * in it.
>>   */
>> -static int intel_msi_alloc_irq(struct pci_dev *dev, int irq, int nvec)
>> +static int intel_msi_alloc_irq(struct msi_irqs *msi, int irq, int nvec)
>>  {
>>  	struct intel_iommu *iommu;
>>  	int index;
>> +	struct pci_dev *dev = msi->data;
>>
>>  	down_read(&dmar_global_lock);
>>  	iommu = map_dev_to_ir(dev);
>> @@ -1089,11 +1091,12 @@ static int intel_msi_alloc_irq(struct pci_dev *dev, int
>> irq, int nvec)
>>  	return index;
>>  }
>>
>> -static int intel_msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
>> +static int intel_msi_setup_irq(struct msi_irqs *msi, unsigned int irq,
>>  			       int index, int sub_handle)
>>  {
>>  	struct intel_iommu *iommu;
>>  	int ret = -ENOENT;
>> +	struct pci_dev *pdev = msi->data;
>>
>>  	down_read(&dmar_global_lock);
>>  	iommu = map_dev_to_ir(pdev);
>> diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
>> index a3b1805..1fe14e5 100644
>> --- a/drivers/iommu/irq_remapping.c
>> +++ b/drivers/iommu/irq_remapping.c
>> @@ -24,8 +24,8 @@ int no_x2apic_optout;
>>
>>  static struct irq_remap_ops *remap_ops;
>>
>> -static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec);
>> -static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
>> +static int msi_alloc_remapped_irq(struct msi_irqs *msi, int irq, int nvec);
>> +static int msi_setup_remapped_irq(struct msi_irqs *msi, unsigned int irq,
>>  				  int index, int sub_handle);
>>  static int set_remapped_irq_affinity(struct irq_data *data,
>>  				     const struct cpumask *mask,
>> @@ -49,19 +49,19 @@ static void irq_remapping_disable_io_apic(void)
>>  		disconnect_bsp_APIC(0);
>>  }
>>
>> -static int do_setup_msi_irqs(struct pci_dev *dev, int nvec)
>> +static int do_setup_msi_irqs(struct msi_irqs *msi, int nvec)
>>  {
>>  	int ret, sub_handle, nvec_pow2, index = 0;
>>  	unsigned int irq;
>>  	struct msi_desc *msidesc;
>>
>> -	WARN_ON(!list_is_singular(&dev->msi_list));
>> -	msidesc = list_entry(dev->msi_list.next, struct msi_desc, list);
>> +	WARN_ON(!list_is_singular(&msi->msi_list));
>> +	msidesc = list_entry(msi->msi_list.next, struct msi_desc, list);
>>  	WARN_ON(msidesc->irq);
>>  	WARN_ON(msidesc->msi_attrib.multiple);
>>  	WARN_ON(msidesc->nvec_used);
>>
>> -	irq = irq_alloc_hwirqs(nvec, dev_to_node(&dev->dev));
>> +	irq = irq_alloc_hwirqs(nvec, msi->node);
>>  	if (irq == 0)
>>  		return -ENOSPC;
>>
>> @@ -70,18 +70,18 @@ static int do_setup_msi_irqs(struct pci_dev *dev, int nvec)
>>  	msidesc->msi_attrib.multiple = ilog2(nvec_pow2);
>>  	for (sub_handle = 0; sub_handle < nvec; sub_handle++) {
>>  		if (!sub_handle) {
>> -			index = msi_alloc_remapped_irq(dev, irq, nvec_pow2);
>> +			index = msi_alloc_remapped_irq(msi, irq, nvec_pow2);
>>  			if (index < 0) {
>>  				ret = index;
>>  				goto error;
>>  			}
>>  		} else {
>> -			ret = msi_setup_remapped_irq(dev, irq + sub_handle,
>> +			ret = msi_setup_remapped_irq(msi, irq + sub_handle,
>>  						     index, sub_handle);
>>  			if (ret < 0)
>>  				goto error;
>>  		}
>> -		ret = setup_msi_irq(dev, msidesc, irq, sub_handle);
>> +		ret = setup_msi_irq(msi, msidesc, irq, sub_handle);
>>  		if (ret < 0)
>>  			goto error;
>>  	}
>> @@ -101,30 +101,29 @@ error:
>>  	return ret;
>>  }
>>
>> -static int do_setup_msix_irqs(struct pci_dev *dev, int nvec)
>> +static int do_setup_msix_irqs(struct msi_irqs *msi, int nvec)
>>  {
>>  	int node, ret, sub_handle, index = 0;
>>  	struct msi_desc *msidesc;
>>  	unsigned int irq;
>>
>> -	node		= dev_to_node(&dev->dev);
>>  	sub_handle	= 0;
>>
>> -	list_for_each_entry(msidesc, &dev->msi_list, list) {
>> +	list_for_each_entry(msidesc, &msi->msi_list, list) {
>>
>> -		irq = irq_alloc_hwirq(node);
>> +		irq = irq_alloc_hwirq(msi->node);
>>  		if (irq == 0)
>>  			return -1;
>>
>>  		if (sub_handle == 0)
>> -			ret = index = msi_alloc_remapped_irq(dev, irq, nvec);
>> +			ret = index = msi_alloc_remapped_irq(msi, irq, nvec);
>>  		else
>> -			ret = msi_setup_remapped_irq(dev, irq, index, sub_handle);
>> +			ret = msi_setup_remapped_irq(msi, irq, index, sub_handle);
>>
>>  		if (ret < 0)
>>  			goto error;
>>
>> -		ret = setup_msi_irq(dev, msidesc, irq, 0);
>> +		ret = setup_msi_irq(msi, msidesc, irq, 0);
>>  		if (ret < 0)
>>  			goto error;
>>
>> @@ -139,13 +138,13 @@ error:
>>  	return ret;
>>  }
>>
>> -static int irq_remapping_setup_msi_irqs(struct pci_dev *dev,
>> +static int irq_remapping_setup_msi_irqs(struct msi_irqs *msi,
>>  					int nvec, int type)
>>  {
>>  	if (type == MSI_TYPE)
>> -		return do_setup_msi_irqs(dev, nvec);
>> +		return do_setup_msi_irqs(msi, nvec);
>>  	else
>> -		return do_setup_msix_irqs(dev, nvec);
>> +		return do_setup_msix_irqs(msi, nvec);
>>  }
>>
>>  static void eoi_ioapic_pin_remapped(int apic, int pin, int vector)
>> @@ -314,33 +313,33 @@ void free_remapped_irq(int irq)
>>  		remap_ops->free_irq(irq);
>>  }
>>
>> -void compose_remapped_msi_msg(struct pci_dev *pdev,
>> +void compose_remapped_msi_msg(struct msi_irqs *msi,
>>  			      unsigned int irq, unsigned int dest,
>>  			      struct msi_msg *msg, u8 hpet_id)
>>  {
>>  	struct irq_cfg *cfg = irq_get_chip_data(irq);
>>
>>  	if (!irq_remapped(cfg))
>> -		native_compose_msi_msg(pdev, irq, dest, msg, hpet_id);
>> +		native_compose_msi_msg(msi, irq, dest, msg, hpet_id);
>>  	else if (remap_ops && remap_ops->compose_msi_msg)
>> -		remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
>> +		remap_ops->compose_msi_msg(msi, irq, dest, msg, hpet_id);
>>  }
>>
>> -static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
>> +static int msi_alloc_remapped_irq(struct msi_irqs *msi, int irq, int nvec)
>>  {
>>  	if (!remap_ops || !remap_ops->msi_alloc_irq)
>>  		return -ENODEV;
>>
>> -	return remap_ops->msi_alloc_irq(pdev, irq, nvec);
>> +	return remap_ops->msi_alloc_irq(msi, irq, nvec);
>>  }
>>
>> -static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
>> +static int msi_setup_remapped_irq(struct msi_irqs *msi, unsigned int irq,
>>  				  int index, int sub_handle)
>>  {
>>  	if (!remap_ops || !remap_ops->msi_setup_irq)
>>  		return -ENODEV;
>>
>> -	return remap_ops->msi_setup_irq(pdev, irq, index, sub_handle);
>> +	return remap_ops->msi_setup_irq(msi, irq, index, sub_handle);
>>  }
>>
>>  int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
>> diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
>> index 90c4dae..59c4cfb 100644
>> --- a/drivers/iommu/irq_remapping.h
>> +++ b/drivers/iommu/irq_remapping.h
>> @@ -69,15 +69,15 @@ struct irq_remap_ops {
>>  	int (*free_irq)(int);
>>
>>  	/* Create MSI msg to use for interrupt remapping */
>> -	void (*compose_msi_msg)(struct pci_dev *,
>> +	void (*compose_msi_msg)(struct msi_irqs *,
>>  				unsigned int, unsigned int,
>>  				struct msi_msg *, u8);
>>
>>  	/* Allocate remapping resources for MSI */
>> -	int (*msi_alloc_irq)(struct pci_dev *, int, int);
>> +	int (*msi_alloc_irq)(struct msi_irqs *, int, int);
>>
>>  	/* Setup the remapped MSI irq */
>> -	int (*msi_setup_irq)(struct pci_dev *, unsigned int, int, int);
>> +	int (*msi_setup_irq)(struct msi_irqs *, unsigned int, int, int);
>>
>>  	/* Setup interrupt remapping for an HPET MSI */
>>  	int (*setup_hpet_msi)(unsigned int, unsigned int);
>> diff --git a/drivers/msi/msi.c b/drivers/msi/msi.c
>> index 3fbd539..8462c6c 100644
>> --- a/drivers/msi/msi.c
>> +++ b/drivers/msi/msi.c
>> @@ -510,9 +510,8 @@ int msix_capability_init(struct msi_irqs *msi, void __iomem
>> *base,
>>
>>  	/* Set MSI-X enabled bits and unmask the function */
>>  	msi_set_intx(msi, 0);
>> -	msi->msix_enabled = 1;
>> -
>>  	msi_set_enable(msi, 1, MSIX_TYPE);
>> +	msi->msix_enabled = 1;
>>
>>  	return 0;
>>
>> --
>> 1.7.1
>>
>> --
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> 

-- 
Thanks!
Yijing