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authorMichael S. Tsirkin <mst@redhat.com>2013-09-10 10:15:00 +0300
committerMichael S. Tsirkin <mst@redhat.com>2013-10-14 17:48:51 +0300
commit6f6d282330a3c85ecbeb54dec5b57282bd177b44 (patch)
treed7bacd8541b8459ba0a555c58e38b699f8026eea /include
parent079e3e7012a0e3ff80b4786e67f5a5d4341dcd51 (diff)
pcie_host: expose address format
Callers pass in the address so it's helpful for them to be able to decode it. Reviewed-by: Gerd Hoffmann <kraxel@redhat.com> Tested-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Tested-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/hw/pci/pcie_host.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/hw/pci/pcie_host.h b/include/hw/pci/pcie_host.h
index bac3c673d6..da0f2759f7 100644
--- a/include/hw/pci/pcie_host.h
+++ b/include/hw/pci/pcie_host.h
@@ -54,4 +54,25 @@ void pcie_host_mmcfg_update(PCIExpressHost *e,
hwaddr addr,
uint32_t size);
+/*
+ * PCI express ECAM (Enhanced Configuration Address Mapping) format.
+ * AKA mmcfg address
+ * bit 20 - 28: bus number
+ * bit 15 - 19: device number
+ * bit 12 - 14: function number
+ * bit 0 - 11: offset in configuration space of a given device
+ */
+#define PCIE_MMCFG_SIZE_MAX (1ULL << 28)
+#define PCIE_MMCFG_SIZE_MIN (1ULL << 20)
+#define PCIE_MMCFG_BUS_BIT 20
+#define PCIE_MMCFG_BUS_MASK 0x1ff
+#define PCIE_MMCFG_DEVFN_BIT 12
+#define PCIE_MMCFG_DEVFN_MASK 0xff
+#define PCIE_MMCFG_CONFOFFSET_MASK 0xfff
+#define PCIE_MMCFG_BUS(addr) (((addr) >> PCIE_MMCFG_BUS_BIT) & \
+ PCIE_MMCFG_BUS_MASK)
+#define PCIE_MMCFG_DEVFN(addr) (((addr) >> PCIE_MMCFG_DEVFN_BIT) & \
+ PCIE_MMCFG_DEVFN_MASK)
+#define PCIE_MMCFG_CONFOFFSET(addr) ((addr) & PCIE_MMCFG_CONFOFFSET_MASK)
+
#endif /* PCIE_HOST_H */