libnvdimm/nfit_test: adding support for unit testing enable LSS status

Adding support code to simulate the enabling of LSS status in support of
the Intel DSM v1.6 Function Index 10: Enable Latch System Shutdown Status.
This is only for testing of libndctl support for LSS enable. The actual
functionality requires a reboot and therefore is not simulated. The enable
value is not recorded in nfit_test since there's no DSM to actually query
the current status of the LSS enable.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

2 files changed, 40 insertions, 0 deletions

diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index a043fea4d58d..42ee1798971d 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -821,6 +821,35 @@ static int nfit_test_cmd_ars_inject_status(struct nfit_test *t,
         return 0;
 }
 
+static int nd_intel_test_cmd_set_lss_status(struct nfit_test *t,
+                struct nd_intel_lss *nd_cmd, unsigned int buf_len)
+{
+        struct device *dev = &t->pdev.dev;
+
+        if (buf_len < sizeof(*nd_cmd))
+                return -EINVAL;
+
+        switch (nd_cmd->enable) {
+        case 0:
+                nd_cmd->status = 0;
+                dev_dbg(dev, "%s: Latch System Shutdown Status disabled\n",
+                                __func__);
+                break;
+        case 1:
+                nd_cmd->status = 0;
+                dev_dbg(dev, "%s: Latch System Shutdown Status enabled\n",
+                                __func__);
+                break;
+        default:
+                dev_warn(dev, "Unknown enable value: %#x\n", nd_cmd->enable);
+                nd_cmd->status = 0x3;
+                break;
+        }
+
+
+        return 0;
+}
+
 static int get_dimm(struct nfit_mem *nfit_mem, unsigned int func)
 {
         int i;
@@ -872,6 +901,9 @@ static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
                                 return i;
 
                         switch (func) {
+                        case ND_INTEL_ENABLE_LSS_STATUS:
+                                return nd_intel_test_cmd_set_lss_status(t,
+                                                buf, buf_len);
                         case ND_INTEL_FW_GET_INFO:
                                 return nd_intel_test_get_fw_info(t, buf,
                                                 buf_len, i - t->dcr_idx);
@@ -1997,6 +2029,7 @@ static void nfit_test0_setup(struct nfit_test *t)
         set_bit(ND_INTEL_FW_SEND_DATA, &acpi_desc->dimm_cmd_force_en);
         set_bit(ND_INTEL_FW_FINISH_UPDATE, &acpi_desc->dimm_cmd_force_en);
         set_bit(ND_INTEL_FW_FINISH_QUERY, &acpi_desc->dimm_cmd_force_en);
+        set_bit(ND_INTEL_ENABLE_LSS_STATUS, &acpi_desc->dimm_cmd_force_en);
 }
 
 static void nfit_test1_setup(struct nfit_test *t)
@@ -2094,6 +2127,7 @@ static void nfit_test1_setup(struct nfit_test *t)
         set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
         set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
         set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
+        set_bit(ND_INTEL_ENABLE_LSS_STATUS, &acpi_desc->dimm_cmd_force_en);
 }
 
 static int nfit_test_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa,
diff --git a/tools/testing/nvdimm/test/nfit_test.h b/tools/testing/nvdimm/test/nfit_test.h
index be8fa8ec0615..428344519cdf 100644
--- a/tools/testing/nvdimm/test/nfit_test.h
+++ b/tools/testing/nvdimm/test/nfit_test.h
@@ -86,6 +86,7 @@ struct nd_cmd_ars_err_inj_stat {
 
 #define ND_INTEL_SMART                   1
 #define ND_INTEL_SMART_THRESHOLD         2
+#define ND_INTEL_ENABLE_LSS_STATUS      10
 #define ND_INTEL_FW_GET_INFO            12
 #define ND_INTEL_FW_START_UPDATE        13
 #define ND_INTEL_FW_SEND_DATA           14
@@ -212,6 +213,11 @@ struct nd_intel_fw_finish_query {
         __u64 updated_fw_rev;
 } __packed;
 
+struct nd_intel_lss {
+        __u8 enable;
+        __u32 status;
+} __packed;
+
 union acpi_object;
 typedef void *acpi_handle;