Function 4 is used to get Namespace lable size
Signed-off-by: Xiao Guangrong guangrong.x...@linux.intel.com
---
hw/mem/pc-nvdimm.c | 87 ++
1 file changed, 87 insertions(+)
diff --git a/hw/mem/pc-nvdimm.c b/hw/mem/pc-nvdimm.c
index b586bf7..7e5446c 100644
--- a/hw/mem/pc-nvdimm.c
+++ b/hw/mem/pc-nvdimm.c
@@ -127,6 +127,20 @@ static uint32_t nvdimm_index_to_handle(int index)
return index + 1;
}
+static PCNVDIMMDevice
+*get_nvdimm_device_by_handle(GSList *list, uint32_t handle)
+{
+for (; list; list = list-next) {
+PCNVDIMMDevice *nvdimm = list-data;
+
+if (nvdimm_index_to_handle(nvdimm-device_index) == handle) {
+return nvdimm;
+}
+}
+
+return NULL;
+}
+
typedef struct {
uint8_t b[16];
} uuid_le;
@@ -391,6 +405,17 @@ enum {
| (1 NFIT_CMD_GET_CONFIG_DATA)\
| (1 NFIT_CMD_SET_CONFIG_DATA))
+struct cmd_in_get_config_data {
+uint32_t offset;
+uint32_t length;
+} QEMU_PACKED;
+
+struct cmd_in_set_config_data {
+uint32_t offset;
+uint32_t length;
+uint8_t in_buf[0];
+} QEMU_PACKED;
+
struct dsm_buffer {
/* RAM page. */
uint32_t handle;
@@ -398,6 +423,7 @@ struct dsm_buffer {
uint32_t arg1;
uint32_t arg2;
union {
+struct cmd_in_set_config_data cmd_config_set;
char arg3[PAGE_SIZE - 3 * sizeof(uint32_t) - 16 * sizeof(uint8_t)];
};
@@ -412,10 +438,23 @@ struct cmd_out_implemented {
uint64_t cmd_list;
};
+struct cmd_out_get_config_size {
+uint32_t status;
+uint32_t config_size;
+uint32_t max_xfer;
+} QEMU_PACKED;
+
+struct cmd_out_get_config_data {
+uint32_t status;
+uint8_t out_buf[0];
+} QEMU_PACKED;
+
struct dsm_out {
union {
uint32_t status;
struct cmd_out_implemented cmd_implemented;
+struct cmd_out_get_config_size cmd_config_size;
+struct cmd_out_get_config_data cmd_config_get;
uint8_t data[PAGE_SIZE];
};
};
@@ -441,6 +480,51 @@ static void dsm_write_root(struct dsm_buffer *in, struct
dsm_out *out)
nvdebug(Return status %#x.\n, out-status);
}
+/*
+ * the max transfer size is the max size transfered by both a
+ * NFIT_CMD_GET_CONFIG_DATA and a NFIT_CMD_SET_CONFIG_DATA
+ * command.
+ */
+static uint32_t max_xfer_config_size(void)
+{
+struct dsm_buffer *in;
+struct dsm_out *out;
+uint32_t max_get_size, max_set_size;
+
+/*
+ * the max data ACPI can read one time which is transfered by
+ * the response of NFIT_CMD_GET_CONFIG_DATA.
+ */
+max_get_size = sizeof(out-data) - sizeof(out-cmd_config_get);
+
+/*
+ * the max data ACPI can write one time which is transfered by
+ * NFIT_CMD_SET_CONFIG_DATA
+ */
+max_set_size = sizeof(in-arg3) - sizeof(in-cmd_config_set);
+return MIN(max_get_size, max_set_size);
+}
+
+static uint32_t dsm_cmd_config_size(struct dsm_buffer *in, struct dsm_out *out)
+{
+GSList *list = get_nvdimm_built_list();
+PCNVDIMMDevice *nvdimm = get_nvdimm_device_by_handle(list, in-handle);
+uint32_t status = NFIT_STATUS_NON_EXISTING_MEM_DEV;
+
+if (!nvdimm) {
+goto exit;
+}
+
+status = NFIT_STATUS_SUCCESS;
+out-cmd_config_size.config_size = nvdimm-config_data_size;
+out-cmd_config_size.max_xfer = max_xfer_config_size();
+nvdebug(%s config_size %#x, max_xfer %#x.\n, __func__,
+out-cmd_config_size.config_size, out-cmd_config_size.max_xfer);
+exit:
+g_slist_free(list);
+return status;
+}
+
static void dsm_write_nvdimm(struct dsm_buffer *in, struct dsm_out *out)
{
uint32_t function = in-arg2;
@@ -450,6 +534,9 @@ static void dsm_write_nvdimm(struct dsm_buffer *in, struct
dsm_out *out)
case NFIT_CMD_IMPLEMENTED:
out-cmd_implemented.cmd_list = DIMM_SUPPORT_CMD;
return;
+case NFIT_CMD_GET_CONFIG_SIZE:
+status = dsm_cmd_config_size(in, out);
+break;
default:
status = NFIT_STATUS_NOT_SUPPORTED;
};
--
2.1.0
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