PCI: designware: Add iATU Unroll feature
Add support for the new iATU Unroll mechanism that will be used from Core
version 4.80. The new Cores can support either iATU Unroll or the "old"
iATU method, now called Legacy Mode. The driver is perfectly capable of
performing well for both.
[bhelgaas: split ATU enable timeout to separate patch]
Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index 285e1ed..e74cc4a 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -48,6 +48,7 @@
int msi_irq;
struct irq_domain *irq_domain;
unsigned long msi_data;
+ u8 iatu_unroll_enabled;
DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
};