[PATCH 12/16] ASoC: Intel: Skylake: add LARGE_CONFIG_GET IPC support

[Vinod Koul <vinod.koul@intel.com>]

From: Mousami Jana <mousami.janax@intel.com>

For messages which need larger payload than mailbox data, we need to send a
series of messages splitting the payload using LARGE_CONFIG_GET IPC.
This adds support for using LARGE_CONFIG_GET to retrieve the large payload

Signed-off-by: Mousami Jana <mousami.janax@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 sound/soc/intel/skylake/skl-sst-ipc.c | 53 +++++++++++++++++++++++++++++++++++
 sound/soc/intel/skylake/skl-sst-ipc.h |  3 ++
 2 files changed, 56 insertions(+)

diff --git a/sound/soc/intel/skylake/skl-sst-ipc.c b/sound/soc/intel/skylake/skl-sst-ipc.c
index d99ec9a2f397..4fcf6c1cc543 100644
--- a/sound/soc/intel/skylake/skl-sst-ipc.c
+++ b/sound/soc/intel/skylake/skl-sst-ipc.c
@@ -349,6 +349,8 @@ static void skl_ipc_process_reply(struct sst_generic_ipc *ipc,
 	switch (reply) {
 	case IPC_GLB_REPLY_SUCCESS:
 		dev_info(ipc->dev, "ipc FW reply %x: success\n", header.primary);
+		/* copy the rx data from the mailbox */
+		sst_dsp_inbox_read(ipc->dsp, msg->rx_data, msg->rx_size);
 		break;
 
 	case IPC_GLB_REPLY_OUT_OF_MEMORY:
@@ -828,3 +830,54 @@ int skl_ipc_set_large_config(struct sst_generic_ipc *ipc,
 	return ret;
 }
 EXPORT_SYMBOL_GPL(skl_ipc_set_large_config);
+
+int skl_ipc_get_large_config(struct sst_generic_ipc *ipc,
+		struct skl_ipc_large_config_msg *msg, u32 *param)
+{
+	struct skl_ipc_header header = {0};
+	u64 *ipc_header = (u64 *)(&header);
+	int ret = 0;
+	size_t sz_remaining, rx_size, data_offset;
+
+	header.primary = IPC_MSG_TARGET(IPC_MOD_MSG);
+	header.primary |= IPC_MSG_DIR(IPC_MSG_REQUEST);
+	header.primary |= IPC_GLB_TYPE(IPC_MOD_LARGE_CONFIG_GET);
+	header.primary |= IPC_MOD_INSTANCE_ID(msg->instance_id);
+	header.primary |= IPC_MOD_ID(msg->module_id);
+
+	header.extension = IPC_DATA_OFFSET_SZ(msg->param_data_size);
+	header.extension |= IPC_LARGE_PARAM_ID(msg->large_param_id);
+	header.extension |= IPC_FINAL_BLOCK(1);
+	header.extension |= IPC_INITIAL_BLOCK(1);
+
+	sz_remaining = msg->param_data_size;
+	data_offset = 0;
+
+	while (sz_remaining != 0) {
+		rx_size = sz_remaining > SKL_ADSP_W1_SZ
+				? SKL_ADSP_W1_SZ : sz_remaining;
+		if (rx_size == sz_remaining)
+			header.extension |= IPC_FINAL_BLOCK(1);
+
+		ret = sst_ipc_tx_message_wait(ipc, *ipc_header, NULL, 0,
+					      ((char *)param) + data_offset,
+					      msg->param_data_size);
+		if (ret < 0) {
+			dev_err(ipc->dev,
+				"ipc: get large config fail, err: %d\n", ret);
+			return ret;
+		}
+		sz_remaining -= rx_size;
+		data_offset = msg->param_data_size - sz_remaining;
+
+		/* clear the fields */
+		header.extension &= IPC_INITIAL_BLOCK_CLEAR;
+		header.extension &= IPC_DATA_OFFSET_SZ_CLEAR;
+		/* fill the fields */
+		header.extension |= IPC_INITIAL_BLOCK(1);
+		header.extension |= IPC_DATA_OFFSET_SZ(data_offset);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(skl_ipc_get_large_config);
diff --git a/sound/soc/intel/skylake/skl-sst-ipc.h b/sound/soc/intel/skylake/skl-sst-ipc.h
index e17012778560..1bbcdb471cf2 100644
--- a/sound/soc/intel/skylake/skl-sst-ipc.h
+++ b/sound/soc/intel/skylake/skl-sst-ipc.h
@@ -120,6 +120,9 @@ int skl_ipc_set_dx(struct sst_generic_ipc *ipc,
 int skl_ipc_set_large_config(struct sst_generic_ipc *ipc,
 		struct skl_ipc_large_config_msg *msg, u32 *param);
 
+int skl_ipc_get_large_config(struct sst_generic_ipc *ipc,
+		struct skl_ipc_large_config_msg *msg, u32 *param);
+
 void skl_ipc_int_enable(struct sst_dsp *dsp);
 void skl_ipc_op_int_enable(struct sst_dsp *ctx);
 void skl_ipc_op_int_disable(struct sst_dsp *ctx);
-- 
2.4.3