Function 5 is used to get Namespace Label Data
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
Signed-off-by: Xiao Guangrong <guangrong.x...@linux.intel.com>
---
hw/acpi/nvdimm.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
index cdc361c..f30e2ff 100644
--- a/hw/acpi/nvdimm.c
+++ b/hw/acpi/nvdimm.c
@@ -428,6 +428,7 @@ struct NvdimmDsmIn {
union {
uint8_t arg3[0];
NvdimmFuncInSetLabelData func_set_label_data;
+ NvdimmFuncInGetLabelData func_get_label_data;
};
} QEMU_PACKED;
typedef struct NvdimmDsmIn NvdimmDsmIn;
@@ -527,6 +528,65 @@ static void nvdimm_dsm_func_label_size(NVDIMMDevice
*nvdimm, GArray *out)
g_array_append_vals(out, &func_label_size, sizeof(func_label_size));
}
+static uint32_t nvdimm_rw_label_data_check(NVDIMMDevice *nvdimm,
+ uint32_t offset, uint32_t length)
+{
+ if (offset + length < offset) {
+ nvdimm_debug("offset %#x + length %#x is overflow.\n", offset,
+ length);
+ return NVDIMM_DSM_DEV_STATUS_INVALID_PARAS;
+ }
+
+ if (nvdimm->label_size < offset + length) {
+ nvdimm_debug("position %#x is beyond label data (len = %#lx).\n",
+ offset + length, nvdimm->label_size);
+ return NVDIMM_DSM_DEV_STATUS_INVALID_PARAS;
+ }
+
+ if (length > nvdimm_get_max_xfer_label_size()) {
+ nvdimm_debug("length (%#x) is larger than max_xfer (%#x).\n",
+ length, nvdimm_get_max_xfer_label_size());
+ return NVDIMM_DSM_DEV_STATUS_INVALID_PARAS;
+ }
+
+ return NVDIMM_DSM_STATUS_SUCCESS;
+}
+
+/*
+ * DSM Spec Rev1 4.5 Get Namespace Label Data (Function Index 5).
+ */
+static void nvdimm_dsm_func_get_label_data(NVDIMMDevice *nvdimm,
+ NvdimmDsmIn *in, GArray *out)
+{
+ NVDIMMClass *nvc = NVDIMM_GET_CLASS(nvdimm);
+ NvdimmFuncInGetLabelData *get_label_data = &in->func_get_label_data;
+ void *buf;
+ uint32_t status;
+
+ le32_to_cpus(&get_label_data->offset);
+ le32_to_cpus(&get_label_data->length);
+
+ nvdimm_debug("Read Label Data: offset %#x length %#x.\n",
+ get_label_data->offset, get_label_data->length);
+
+ status = nvdimm_rw_label_data_check(nvdimm, get_label_data->offset,
+ get_label_data->length);
+ if (status != NVDIMM_DSM_STATUS_SUCCESS) {
+ goto exit;
+ }
+
+ /* write nvdimm_func_out_get_label_data.status. */
+ nvdimm_dsm_write_status(out, status);
+ /* write nvdimm_func_out_get_label_data.out_buf. */
+ buf = acpi_data_push(out, get_label_data->length);
+ nvc->read_label_data(nvdimm, buf, get_label_data->length,
+ get_label_data->offset);
+ return;
+
+exit:
+ nvdimm_dsm_write_status(out, status);
+}
+
static void nvdimm_dsm_device(NvdimmDsmIn *in, GArray *out)
{
GSList *list = nvdimm_get_plugged_device_list();
@@ -554,6 +614,9 @@ static void nvdimm_dsm_device(NvdimmDsmIn *in, GArray *out)
case 0x4 /* Get Namespace Label Size */:
nvdimm_dsm_func_label_size(nvdimm, out);
goto free;
+ case 0x5 /* Get Namespace Label Data */:
+ nvdimm_dsm_func_get_label_data(nvdimm, in, out);
+ goto free;
default:
status = NVDIMM_DSM_STATUS_NOT_SUPPORTED;
};
--
1.8.3.1
