powerpc/fsl_msi: add support for "msi-address-64" property
Add support for the msi-address-64 property of a PCI node. This property
specifies the PCI address of MSIIR (message signaled interrupt index
register).
In commit 3da34aae ("powerpc/fsl: Support unique MSI addresses per PCIe Root
Complex"), the msi_addr_hi/msi_addr_lo fields of struct fsl_msi were redefined
from an actual address to just an offset, but the fields were not renamed
accordingly. These fields are replace with a single field, msiir_offset,
to reflect the new meaning.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index 1cca251..e5c344d 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -30,7 +30,7 @@
struct fsl_msi_feature {
u32 fsl_pic_ip;
- u32 msiir_offset;
+ u32 msiir_offset; /* Offset of MSIIR, relative to start of MSIR bank */
};
struct fsl_msi_cascade_data {
@@ -126,10 +126,19 @@
{
struct fsl_msi *msi_data = fsl_msi_data;
struct pci_controller *hose = pci_bus_to_host(pdev->bus);
- u64 base = fsl_pci_immrbar_base(hose);
+ u64 address; /* Physical address of the MSIIR */
+ int len;
+ const u64 *reg;
- msg->address_lo = msi_data->msi_addr_lo + lower_32_bits(base);
- msg->address_hi = msi_data->msi_addr_hi + upper_32_bits(base);
+ /* If the msi-address-64 property exists, then use it */
+ reg = of_get_property(hose->dn, "msi-address-64", &len);
+ if (reg && (len == sizeof(u64)))
+ address = be64_to_cpup(reg);
+ else
+ address = fsl_pci_immrbar_base(hose) + msi_data->msiir_offset;
+
+ msg->address_lo = lower_32_bits(address);
+ msg->address_hi = upper_32_bits(address);
msg->data = hwirq;
@@ -359,8 +368,7 @@
msi->irqhost->host_data = msi;
- msi->msi_addr_hi = 0x0;
- msi->msi_addr_lo = features->msiir_offset + (res.start & 0xfffff);
+ msi->msiir_offset = features->msiir_offset + (res.start & 0xfffff);
rc = fsl_msi_init_allocator(msi);
if (rc) {
diff --git a/arch/powerpc/sysdev/fsl_msi.h b/arch/powerpc/sysdev/fsl_msi.h
index 624580c..1313abb 100644
--- a/arch/powerpc/sysdev/fsl_msi.h
+++ b/arch/powerpc/sysdev/fsl_msi.h
@@ -28,8 +28,7 @@
unsigned long cascade_irq;
- u32 msi_addr_lo;
- u32 msi_addr_hi;
+ u32 msiir_offset; /* Offset of MSIIR, relative to start of CCSR */
void __iomem *msi_regs;
u32 feature;
int msi_virqs[NR_MSI_REG];
