[Xen-devel] [PATCH v2 12/22] MIPS/Octeon/MSI: Use MSI chip framework to configure MSI/MSI-X irq

[Yijing Wang <wangyijing@xxxxxxxxxx>]

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>
---
 arch/mips/pci/msi-octeon.c |   35 ++++++++++++++++++++++-------------
 1 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/arch/mips/pci/msi-octeon.c b/arch/mips/pci/msi-octeon.c
index 63bbe07..14f2d16 100644
--- a/arch/mips/pci/msi-octeon.c
+++ b/arch/mips/pci/msi-octeon.c
@@ -57,7 +57,7 @@ static int msi_irq_size;
  *
  * Returns 0 on success.
  */
-int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
+static int octeon_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 {
        struct msi_msg msg;
        u16 control;
@@ -132,12 +132,12 @@ msi_irq_allocated:
        /* Make sure the search for available interrupts didn't fail */
        if (irq >= 64) {
                if (request_private_bits) {
-                       pr_err("arch_setup_msi_irq: Unable to find %d free 
interrupts, trying just one",
+                       pr_err("octeon_setup_msi_irq: Unable to find %d free 
interrupts, trying just one",
                               1 << request_private_bits);
                        request_private_bits = 0;
                        goto try_only_one;
                } else
-                       panic("arch_setup_msi_irq: Unable to find a free MSI 
interrupt");
+                       panic("octeon_setup_msi_irq: Unable to find a free MSI 
interrupt");
        }
 
        /* MSI interrupts start at logical IRQ OCTEON_IRQ_MSI_BIT0 */
@@ -168,7 +168,7 @@ msi_irq_allocated:
                msg.address_hi = (0 + CVMX_SLI_PCIE_MSI_RCV) >> 32;
                break;
        default:
-               panic("arch_setup_msi_irq: Invalid octeon_dma_bar_type");
+               panic("octeon_setup_msi_irq: Invalid octeon_dma_bar_type");
        }
        msg.data = irq - OCTEON_IRQ_MSI_BIT0;
 
@@ -182,7 +182,7 @@ msi_irq_allocated:
        return 0;
 }
 
-int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+static int octeon_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
        struct msi_desc *entry;
        int ret;
@@ -201,7 +201,7 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int 
type)
                return 1;
 
        list_for_each_entry(entry, &dev->msi_list, list) {
-               ret = arch_setup_msi_irq(dev, entry);
+               ret = octeon_setup_msi_irq(dev, entry);
                if (ret < 0)
                        return ret;
                if (ret > 0)
@@ -210,14 +210,13 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, 
int type)
 
        return 0;
 }
-
 /**
  * Called when a device no longer needs its MSI interrupts. All
  * MSI interrupts for the device are freed.
  *
  * @irq:    The devices first irq number. There may be multple in sequence.
  */
-void arch_teardown_msi_irq(unsigned int irq)
+static void octeon_teardown_msi_irq(unsigned int irq)
 {
        int number_irqs;
        u64 bitmask;
@@ -226,8 +225,8 @@ void arch_teardown_msi_irq(unsigned int irq)
 
        if ((irq < OCTEON_IRQ_MSI_BIT0)
                || (irq > msi_irq_size + OCTEON_IRQ_MSI_BIT0))
-               panic("arch_teardown_msi_irq: Attempted to teardown illegal "
-                     "MSI interrupt (%d)", irq);
+               panic("octeon_teardown_msi_irq: Attempted to teardown illegal "
+                       "MSI interrupt (%d)", irq);
 
        irq -= OCTEON_IRQ_MSI_BIT0;
        index = irq / 64;
@@ -240,7 +239,7 @@ void arch_teardown_msi_irq(unsigned int irq)
         */
        number_irqs = 0;
        while ((irq0 + number_irqs < 64) &&
-              (msi_multiple_irq_bitmask[index]
+               (msi_multiple_irq_bitmask[index]
                & (1ull << (irq0 + number_irqs))))
                number_irqs++;
        number_irqs++;
@@ -249,8 +248,8 @@ void arch_teardown_msi_irq(unsigned int irq)
        /* Shift the mask to the correct bit location */
        bitmask <<= irq0;
        if ((msi_free_irq_bitmask[index] & bitmask) != bitmask)
-               panic("arch_teardown_msi_irq: Attempted to teardown MSI "
-                     "interrupt (%d) not in use", irq);
+               panic("octeon_teardown_msi_irq: Attempted to teardown MSI "
+                       "interrupt (%d) not in use", irq);
 
        /* Checks are done, update the in use bitmask */
        spin_lock(&msi_free_irq_bitmask_lock);
@@ -259,6 +258,16 @@ void arch_teardown_msi_irq(unsigned int irq)
        spin_unlock(&msi_free_irq_bitmask_lock);
 }
 
+static struct msi_chip octeon_msi_chip = {
+       .setup_irqs = octeon_setup_msi_irqs,
+       .teardown_irq = octeon_teardown_msi_irq,
+};
+
+struct msi_chip *arch_find_msi_chip(struct pci_dev *dev)
+{
+       return &octeon_msi_chip;
+}
+
 static DEFINE_RAW_SPINLOCK(octeon_irq_msi_lock);
 
 static u64 msi_rcv_reg[4];
-- 
1.7.1


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