Subject: [RFC Patch V1 08/12] PCI: Use helper functions to access fields in struct msi_desc

From: [email-masked] (Jingoo Han)
Date: Sun, 12 Jul 2015 20:18:29 +0900

On Thursday, July 09, 2015 5:01 PM, Jiang Liu wrote:
> 
> Use helper functions to access fields in struct msi_desc, so we could
> easily refine msi_desc later.
> 
> Signed-off-by: Jiang Liu <[email-masked]>

For pcie-designware.c,

Acked-by: Jingoo Han <[email-masked]>

Best regards,
Jingoo Han

> ---
>  drivers/pci/host/pci-keystone-dw.c |    6 +++---
>  drivers/pci/host/pcie-designware.c |    4 ++--
>  drivers/pci/host/pcie-xilinx.c     |   12 +++++-------
>  drivers/pci/msi.c                  |   13 ++++++++-----
>  4 files changed, 18 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/pci/host/pci-keystone-dw.c b/drivers/pci/host/pci-keystone-dw.c
> index f34892e0edb4..e792086c1639 100644
> --- a/drivers/pci/host/pci-keystone-dw.c
> +++ b/drivers/pci/host/pci-keystone-dw.c
> @@ -109,7 +109,7 @@ static void ks_dw_pcie_msi_irq_ack(struct irq_data *d)
>  	struct pcie_port *pp;
> 
>  	msi = irq_get_msi_desc(irq);
> -	pp = sys_to_pcie(msi->dev->bus->sysdata);
> +	pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
>  	ks_pcie = to_keystone_pcie(pp);
>  	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
>  	update_reg_offset_bit_pos(offset, &reg_offset, &bit_pos);
> @@ -148,7 +148,7 @@ static void ks_dw_pcie_msi_irq_mask(struct irq_data *d)
>  	u32 offset;
> 
>  	msi = irq_get_msi_desc(irq);
> -	pp = sys_to_pcie(msi->dev->bus->sysdata);
> +	pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
>  	ks_pcie = to_keystone_pcie(pp);
>  	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
> 
> @@ -170,7 +170,7 @@ static void ks_dw_pcie_msi_irq_unmask(struct irq_data *d)
>  	u32 offset;
> 
>  	msi = irq_get_msi_desc(irq);
> -	pp = sys_to_pcie(msi->dev->bus->sysdata);
> +	pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
>  	ks_pcie = to_keystone_pcie(pp);
>  	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
> 
> diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
> index 69486be7181e..65596f96763c 100644
> --- a/drivers/pci/host/pcie-designware.c
> +++ b/drivers/pci/host/pcie-designware.c
> @@ -255,7 +255,7 @@ static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
>  static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
>  {
>  	int irq, pos0, i;
> -	struct pcie_port *pp = sys_to_pcie(desc->dev->bus->sysdata);
> +	struct pcie_port *pp = sys_to_pcie(msi_desc_to_pci_sysdata(desc));
> 
>  	pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
>  				       order_base_2(no_irqs));
> @@ -327,7 +327,7 @@ static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
>  {
>  	struct irq_data *data = irq_get_irq_data(irq);
>  	struct msi_desc *msi = irq_data_get_msi(data);
> -	struct pcie_port *pp = sys_to_pcie(msi->dev->bus->sysdata);
> +	struct pcie_port *pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
> 
>  	clear_irq_range(pp, irq, 1, data->hwirq);
>  }
> diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
> index f1a06a091ccb..64454f416639 100644
> --- a/drivers/pci/host/pcie-xilinx.c
> +++ b/drivers/pci/host/pcie-xilinx.c
> @@ -227,18 +227,16 @@ static struct pci_ops xilinx_pcie_ops = {
>   */
>  static void xilinx_pcie_destroy_msi(unsigned int irq)
>  {
> -	struct irq_desc *desc;
>  	struct msi_desc *msi;
>  	struct xilinx_pcie_port *port;
> 
> -	desc = irq_to_desc(irq);
> -	msi = irq_desc_get_msi_desc(desc);
> -	port = sys_to_pcie(msi->dev->bus->sysdata);
> -
> -	if (!test_bit(irq, msi_irq_in_use))
> +	if (!test_bit(irq, msi_irq_in_use)) {
> +		msi = irq_get_msi_desc(irq);
> +		port = sys_to_pcie(msi_desc_to_pci_sys_data(msi));
>  		dev_err(port->dev, "Trying to free unused MSI#%d\n", irq);
> -	else
> +	} else {
>  		clear_bit(irq, msi_irq_in_use);
> +	}
>  }
> 
>  /**
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index d09afa78d7a1..6497608545e2 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -208,7 +208,8 @@ u32 __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag)
> 
>  	mask_bits &= ~mask;
>  	mask_bits |= flag;
> -	pci_write_config_dword(desc->dev, desc->mask_pos, mask_bits);
> +	pci_write_config_dword(msi_desc_to_pci_dev(desc), desc->mask_pos,
> +			       mask_bits);
> 
>  	return mask_bits;
>  }
> @@ -288,7 +289,9 @@ void default_restore_msi_irqs(struct pci_dev *dev)
> 
>  void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>  {
> -	BUG_ON(entry->dev->current_state != PCI_D0);
> +	struct pci_dev *dev = msi_desc_to_pci_dev(entry);
> +
> +	BUG_ON(dev->current_state != PCI_D0);
> 
>  	if (entry->msi_attrib.is_msix) {
>  		void __iomem *base = entry->mask_base +
> @@ -298,7 +301,6 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>  		msg->address_hi = readl(base + PCI_MSIX_ENTRY_UPPER_ADDR);
>  		msg->data = readl(base + PCI_MSIX_ENTRY_DATA);
>  	} else {
> -		struct pci_dev *dev = entry->dev;
>  		int pos = dev->msi_cap;
>  		u16 data;
> 
> @@ -318,7 +320,9 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
> 
>  void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>  {
> -	if (entry->dev->current_state != PCI_D0) {
> +	struct pci_dev *dev = msi_desc_to_pci_dev(entry);
> +
> +	if (dev->current_state != PCI_D0) {
>  		/* Don't touch the hardware now */
>  	} else if (entry->msi_attrib.is_msix) {
>  		void __iomem *base;
> @@ -329,7 +333,6 @@ void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>  		writel(msg->address_hi, base + PCI_MSIX_ENTRY_UPPER_ADDR);
>  		writel(msg->data, base + PCI_MSIX_ENTRY_DATA);
>  	} else {
> -		struct pci_dev *dev = entry->dev;
>  		int pos = dev->msi_cap;
>  		u16 msgctl;
> 
> --
> 1.7.10.4