[RFC v1 07/18] hw/pci: add pci_device_bind/unbind_gpasid

[Liu Yi L <yi.l.liu@xxxxxxxxx>]

This patch adds two callbacks pci_device_bind/unbind_gpasid() to
PCIPASIDOps. These two callbacks are used to propagate guest pasid
bind/unbind to host. The implementations of the callbacks would be
device passthru modules like vfio.

Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Eric Auger <eric.auger@xxxxxxxxxx>
Cc: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
Cc: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Liu Yi L <yi.l.liu@xxxxxxxxx>
---
 hw/pci/pci.c         | 30 ++++++++++++++++++++++++++++++
 include/hw/pci/pci.h |  9 +++++++++
 2 files changed, 39 insertions(+)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 710f9e9..2229229 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2676,6 +2676,36 @@ int pci_device_request_pasid_free(PCIBus *bus, int32_t devfn,
     return -1;
 }
 
+void pci_device_bind_gpasid(PCIBus *bus, int32_t devfn,
+                                struct gpasid_bind_data *g_bind_data)
+{
+    PCIDevice *dev;
+
+    if (!bus) {
+        return;
+    }
+
+    dev = bus->devices[devfn];
+    if (dev && dev->pasid_ops) {
+        dev->pasid_ops->bind_gpasid(bus, devfn, g_bind_data);
+    }
+}
+
+void pci_device_unbind_gpasid(PCIBus *bus, int32_t devfn,
+                                struct gpasid_bind_data *g_bind_data)
+{
+    PCIDevice *dev;
+
+    if (!bus) {
+        return;
+    }
+
+    dev = bus->devices[devfn];
+    if (dev && dev->pasid_ops) {
+        dev->pasid_ops->unbind_gpasid(bus, devfn, g_bind_data);
+    }
+}
+
 static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)
 {
     Range *range = opaque;
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 16e5b8e..8d849e6 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -9,6 +9,7 @@
 #include "hw/isa/isa.h"
 
 #include "hw/pci/pcie.h"
+#include <linux/iommu.h>
 
 extern bool pci_available;
 
@@ -267,6 +268,10 @@ struct PCIPASIDOps {
     int (*alloc_pasid)(PCIBus *bus, int32_t devfn,
                          uint32_t min_pasid, uint32_t max_pasid);
     int (*free_pasid)(PCIBus *bus, int32_t devfn, uint32_t pasid);
+    void (*bind_gpasid)(PCIBus *bus, int32_t devfn,
+                            struct gpasid_bind_data *g_bind_data);
+    void (*unbind_gpasid)(PCIBus *bus, int32_t devfn,
+                            struct gpasid_bind_data *g_bind_data);
 };
 
 struct PCIDevice {
@@ -497,6 +502,10 @@ bool pci_device_is_ops_set(PCIBus *bus, int32_t devfn);
 int pci_device_request_pasid_alloc(PCIBus *bus, int32_t devfn,
                                    uint32_t min_pasid, uint32_t max_pasid);
 int pci_device_request_pasid_free(PCIBus *bus, int32_t devfn, uint32_t pasid);
+void pci_device_bind_gpasid(PCIBus *bus, int32_t devfn,
+                            struct gpasid_bind_data *g_bind_data);
+void pci_device_unbind_gpasid(PCIBus *bus, int32_t devfn,
+                            struct gpasid_bind_data *g_bind_data);
 
 static inline void
 pci_set_byte(uint8_t *config, uint8_t val)
-- 
2.7.4