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Date: Sun, 12 Jul 2015 20:18:29 +0900
From: "Jingoo Han" <jingoohan1@...il.com>
To: "'Jiang Liu'" <jiang.liu@...ux.intel.com>
Cc: "'Bjorn Helgaas'" <bhelgaas@...gle.com>,
"'Thomas Gleixner'" <tglx@...utronix.de>,
"'Ingo Molnar'" <mingo@...hat.com>,
"'Grant Likely'" <grant.likely@...aro.org>,
"'Marc Zyngier'" <marc.zyngier@....com>,
"'Stuart Yoder'" <stuart.yoder@...escale.com>,
"'Yijing Wang'" <wangyijing@...wei.com>,
"'Borislav Petkov'" <bp@...en8.de>,
"'Murali Karicheri'" <m-karicheri2@...com>,
"'Pratyush Anand'" <pratyush.anand@...il.com>,
"'Michal Simek'" <michal.simek@...inx.com>,
'Sören Brinkmann' <soren.brinkmann@...inx.com>,
"'Srikanth Thokala'" <sthokal@...inx.com>,
"'Rob Herring'" <robh@...nel.org>,
"'Tony Luck'" <tony.luck@...el.com>,
<linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
"'Jingoo Han'" <jingoohan1@...il.com>
Subject: Re: [RFC Patch V1 08/12] PCI: Use helper functions to access fields in struct msi_desc
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 <jiang.liu@...ux.intel.com>
For pcie-designware.c,
Acked-by: Jingoo Han <jingoohan1@...il.com>
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, ®_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
--
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