PCI: iproc: Allow allocation of multiple MSIs
Add support for allocating multiple MSIs at the same time, so that the
MSI_FLAG_MULTI_PCI_MSI flag can be added to the msi_domain_info structure.
Avoid storing the hwirq in the low 5 bits of the message data, as it is
used by the device. Also fix an endianness problem by using readl().
Signed-off-by: Sandor Bodo-Merle <sbodomerle@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
diff --git a/drivers/pci/host/pcie-iproc-msi.c b/drivers/pci/host/pcie-iproc-msi.c
index 2d0f535..990fc90 100644
--- a/drivers/pci/host/pcie-iproc-msi.c
+++ b/drivers/pci/host/pcie-iproc-msi.c
@@ -179,7 +179,7 @@
static struct msi_domain_info iproc_msi_domain_info = {
.flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
- MSI_FLAG_PCI_MSIX,
+ MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX,
.chip = &iproc_msi_irq_chip,
};
@@ -237,7 +237,7 @@
addr = msi->msi_addr + iproc_msi_addr_offset(msi, data->hwirq);
msg->address_lo = lower_32_bits(addr);
msg->address_hi = upper_32_bits(addr);
- msg->data = data->hwirq;
+ msg->data = data->hwirq << 5;
}
static struct irq_chip iproc_msi_bottom_irq_chip = {
@@ -251,7 +251,7 @@
void *args)
{
struct iproc_msi *msi = domain->host_data;
- int hwirq;
+ int hwirq, i;
mutex_lock(&msi->bitmap_lock);
@@ -267,10 +267,14 @@
mutex_unlock(&msi->bitmap_lock);
- irq_domain_set_info(domain, virq, hwirq, &iproc_msi_bottom_irq_chip,
- domain->host_data, handle_simple_irq, NULL, NULL);
+ for (i = 0; i < nr_irqs; i++) {
+ irq_domain_set_info(domain, virq + i, hwirq + i,
+ &iproc_msi_bottom_irq_chip,
+ domain->host_data, handle_simple_irq,
+ NULL, NULL);
+ }
- return 0;
+ return hwirq;
}
static void iproc_msi_irq_domain_free(struct irq_domain *domain,
@@ -302,7 +306,8 @@
offs = iproc_msi_eq_offset(msi, eq) + head * sizeof(u32);
msg = (u32 *)(msi->eq_cpu + offs);
- hwirq = *msg & IPROC_MSI_EQ_MASK;
+ hwirq = readl(msg);
+ hwirq = (hwirq >> 5) + (hwirq & 0x1f);
/*
* Since we have multiple hwirq mapped to a single MSI vector,