[PULL 22/91] hw/cxl/device: Plumb real Label Storage Area (LSA) sizing

["Michael S. Tsirkin" <mst@redhat.com>]

From: Ben Widawsky <ben.widawsky@intel.com>

This should introduce no change. Subsequent work will make use of this
new class member.

Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20220429144110.25167-21-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/cxl/cxl_device.h | 11 ++++++++++-
 hw/cxl/cxl-mailbox-utils.c  |  3 +++
 hw/mem/cxl_type3.c          |  9 +++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h
index d8da2c7b68..ea2571a69b 100644
--- a/include/hw/cxl/cxl_device.h
+++ b/include/hw/cxl/cxl_device.h
@@ -236,6 +236,7 @@ struct CXLType3Dev {
 
     /* Properties */
     HostMemoryBackend *hostmem;
+    HostMemoryBackend *lsa;
 
     /* State */
     CXLComponentState cxl_cstate;
@@ -243,6 +244,14 @@ struct CXLType3Dev {
 };
 
 #define TYPE_CXL_TYPE3 "cxl-type3"
-OBJECT_DECLARE_SIMPLE_TYPE(CXLType3Dev, CXL_TYPE3)
+OBJECT_DECLARE_TYPE(CXLType3Dev, CXLType3Class, CXL_TYPE3)
+
+struct CXLType3Class {
+    /* Private */
+    PCIDeviceClass parent_class;
+
+    /* public */
+    uint64_t (*get_lsa_size)(CXLType3Dev *ct3d);
+};
 
 #endif
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index c8188d7087..492739aef3 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -277,6 +277,8 @@ static ret_code cmd_identify_memory_device(struct cxl_cmd *cmd,
     } QEMU_PACKED *id;
     QEMU_BUILD_BUG_ON(sizeof(*id) != 0x43);
 
+    CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate);
+    CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
     uint64_t size = cxl_dstate->pmem_size;
 
     if (!QEMU_IS_ALIGNED(size, 256 << 20)) {
@@ -291,6 +293,7 @@ static ret_code cmd_identify_memory_device(struct cxl_cmd *cmd,
 
     id->total_capacity = size / (256 << 20);
     id->persistent_capacity = size / (256 << 20);
+    id->lsa_size = cvc->get_lsa_size(ct3d);
 
     *len = sizeof(*id);
     return CXL_MBOX_SUCCESS;
diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c
index 318b6f9fbc..b5aa1067df 100644
--- a/hw/mem/cxl_type3.c
+++ b/hw/mem/cxl_type3.c
@@ -179,10 +179,16 @@ static Property ct3_props[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static uint64_t get_lsa_size(CXLType3Dev *ct3d)
+{
+    return 0;
+}
+
 static void ct3_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
+    CXLType3Class *cvc = CXL_TYPE3_CLASS(oc);
 
     pc->realize = ct3_realize;
     pc->exit = ct3_exit;
@@ -195,11 +201,14 @@ static void ct3_class_init(ObjectClass *oc, void *data)
     dc->desc = "CXL PMEM Device (Type 3)";
     dc->reset = ct3d_reset;
     device_class_set_props(dc, ct3_props);
+
+    cvc->get_lsa_size = get_lsa_size;
 }
 
 static const TypeInfo ct3d_info = {
     .name = TYPE_CXL_TYPE3,
     .parent = TYPE_PCI_DEVICE,
+    .class_size = sizeof(struct CXLType3Class),
     .class_init = ct3_class_init,
     .instance_size = sizeof(CXLType3Dev),
     .interfaces = (InterfaceInfo[]) {
-- 
MST