[PATCH v4 4/5] acpi/nvdimm: Implement ACPI NVDIMM Label Methods

[Robert Hoo <robert.hu@linux.intel.com>]

Recent ACPI spec [1] has defined NVDIMM Label Methods _LS{I,R,W}, which
deprecates corresponding _DSM Functions defined by PMEM _DSM Interface spec
[2].

Since the semantics of the new Label Methods are almost same as old _DSM
methods, the implementations here simply wrapper old ones.

ASL form diff can be found in next patch of updating golden master
binaries.

[1] ACPI Spec v6.4, 6.5.10 NVDIMM Label Methods
https://uefi.org/sites/default/files/resources/ACPI_Spec_6_4_Jan22.pdf
[2] Intel PMEM _DSM Interface Spec v2.0, 3.10 Deprecated Functions
https://pmem.io/documents/IntelOptanePMem_DSM_Interface-V2.0.pdf

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
---
 hw/acpi/nvdimm.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
index afff911c1e..a3b25a92f3 100644
--- a/hw/acpi/nvdimm.c
+++ b/hw/acpi/nvdimm.c
@@ -1243,6 +1243,7 @@ static void nvdimm_build_fit(Aml *dev)
 static void nvdimm_build_nvdimm_devices(Aml *root_dev, uint32_t ram_slots)
 {
     uint32_t slot;
+    Aml *method, *pkg, *field, *com_call;
 
     for (slot = 0; slot < ram_slots; slot++) {
         uint32_t handle = nvdimm_slot_to_handle(slot);
@@ -1260,6 +1261,100 @@ static void nvdimm_build_nvdimm_devices(Aml *root_dev, uint32_t ram_slots)
          */
         aml_append(nvdimm_dev, aml_name_decl("_ADR", aml_int(handle)));
 
+        /*
+         * ACPI v6.4: Section 6.5.10 NVDIMM Label Methods
+         */
+        /* _LSI */
+        method = aml_method("_LSI", 0, AML_SERIALIZED);
+        com_call = aml_call5(NVDIMM_COMMON_DSM,
+                            aml_touuid(NVDIMM_DEVICE_DSM_UUID),
+                            aml_int(1), aml_int(4), aml_int(0),
+                            aml_int(handle));
+        aml_append(method, aml_store(com_call, aml_local(0)));
+
+        aml_append(method, aml_create_dword_field(aml_local(0),
+                                                  aml_int(0), "STTS"));
+        aml_append(method, aml_create_dword_field(aml_local(0), aml_int(4),
+                                                  "SLSA"));
+        aml_append(method, aml_create_dword_field(aml_local(0), aml_int(8),
+                                                  "MAXT"));
+
+        pkg = aml_package(3);
+        aml_append(pkg, aml_name("STTS"));
+        aml_append(pkg, aml_name("SLSA"));
+        aml_append(pkg, aml_name("MAXT"));
+        aml_append(method, aml_store(pkg, aml_local(1)));
+        aml_append(method, aml_return(aml_local(1)));
+
+        aml_append(nvdimm_dev, method);
+
+        /* _LSR */
+        method = aml_method("_LSR", 2, AML_SERIALIZED);
+        aml_append(method, aml_name_decl("INPT", aml_buffer(8, NULL)));
+
+        aml_append(method, aml_create_dword_field(aml_name("INPT"),
+                                                  aml_int(0), "OFST"));
+        aml_append(method, aml_create_dword_field(aml_name("INPT"),
+                                                  aml_int(4), "LEN"));
+        aml_append(method, aml_store(aml_arg(0), aml_name("OFST")));
+        aml_append(method, aml_store(aml_arg(1), aml_name("LEN")));
+
+        pkg = aml_package(1);
+        aml_append(pkg, aml_name("INPT"));
+        aml_append(method, aml_store(pkg, aml_local(0)));
+
+        com_call = aml_call5(NVDIMM_COMMON_DSM,
+                            aml_touuid(NVDIMM_DEVICE_DSM_UUID),
+                            aml_int(1), aml_int(5), aml_local(0),
+                            aml_int(handle));
+        aml_append(method, aml_store(com_call, aml_local(3)));
+        field = aml_create_dword_field(aml_local(3), aml_int(0), "STTS");
+        aml_append(method, field);
+        field = aml_create_field(aml_local(3), aml_int(32),
+                                 aml_shiftleft(aml_name("LEN"), aml_int(3)),
+                                 "LDAT");
+        aml_append(method, field);
+        aml_append(method, aml_name_decl("LSA", aml_buffer(0, NULL)));
+        aml_append(method, aml_to_buffer(aml_name("LDAT"), aml_name("LSA")));
+
+        pkg = aml_package(2);
+        aml_append(pkg, aml_name("STTS"));
+        aml_append(pkg, aml_name("LSA"));
+
+        aml_append(method, aml_store(pkg, aml_local(1)));
+        aml_append(method, aml_return(aml_local(1)));
+
+        aml_append(nvdimm_dev, method);
+
+        /* _LSW */
+        method = aml_method("_LSW", 3, AML_SERIALIZED);
+        aml_append(method, aml_store(aml_arg(2), aml_local(2)));
+        aml_append(method, aml_name_decl("INPT", aml_buffer(8, NULL)));
+        field = aml_create_dword_field(aml_name("INPT"),
+                                                  aml_int(0), "OFST");
+        aml_append(method, field);
+        field = aml_create_dword_field(aml_name("INPT"),
+                                                  aml_int(4), "TLEN");
+        aml_append(method, field);
+        aml_append(method, aml_store(aml_arg(0), aml_name("OFST")));
+        aml_append(method, aml_store(aml_arg(1), aml_name("TLEN")));
+
+        aml_append(method, aml_concatenate(aml_name("INPT"), aml_local(2),
+                                            aml_name("INPT")));
+        pkg = aml_package(1);
+        aml_append(pkg, aml_name("INPT"));
+        aml_append(method, aml_store(pkg, aml_local(0)));
+        com_call = aml_call5(NVDIMM_COMMON_DSM,
+                            aml_touuid(NVDIMM_DEVICE_DSM_UUID),
+                            aml_int(1), aml_int(6), aml_local(0),
+                            aml_int(handle));
+        aml_append(method, aml_store(com_call, aml_local(3)));
+        field = aml_create_dword_field(aml_local(3), aml_int(0), "STTS");
+        aml_append(method, field);
+        aml_append(method, aml_return(aml_name("STTS")));
+
+        aml_append(nvdimm_dev, method);
+
         nvdimm_build_device_dsm(nvdimm_dev, handle);
         aml_append(root_dev, nvdimm_dev);
     }
-- 
2.31.1