ASoC: Intel: Skylake: large_config_get overhaul

LARGE_CONFIG_GET is mainly used to retrieve requested module parameters
but it may also carry TX payload with them. Update its implementation to
account for both TX and RX data.
First reply.header carries total payload size within data_off_sizefield.
Make use of reply.header to realloc returned buffer with correct size.

Failure of IPC request is permissive - error-payload may be returned, an
informative data why GET for given param failed - and thus function
should not collapse before entire processing is finished. Caller is
responsible for checking returned payload and bytes parameters.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20190808181549.12521-3-cezary.rojewski@intel.com
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 20 insertions, 5 deletions

diff --git a/sound/soc/intel/skylake/skl-sst-ipc.c b/sound/soc/intel/skylake/skl-sst-ipc.c
index 196c80dadb1f..667cdddc289f 100644
--- a/sound/soc/intel/skylake/skl-sst-ipc.c
+++ b/sound/soc/intel/skylake/skl-sst-ipc.c
@@ -969,12 +969,18 @@ int skl_ipc_set_large_config(struct sst_generic_ipc *ipc,
 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_large_config_msg *msg,
+		u32 **payload, size_t *bytes)
 {
 	struct skl_ipc_header header = {0};
-	struct sst_ipc_message request = {0}, reply = {0};
+	struct sst_ipc_message request, reply = {0};
+	unsigned int *buf;
 	int ret;
 
+	reply.data = kzalloc(SKL_ADSP_W1_SZ, GFP_KERNEL);
+	if (!reply.data)
+		return -ENOMEM;
+
 	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);
@@ -986,13 +992,22 @@ int skl_ipc_get_large_config(struct sst_generic_ipc *ipc,
 	header.extension |= IPC_FINAL_BLOCK(1);
 	header.extension |= IPC_INITIAL_BLOCK(1);
 
-	request.header = *(u64 *)(&header);
-	reply.data = param;
-	reply.size = msg->param_data_size;
+	request.header = *(u64 *)&header;
+	request.data = *payload;
+	request.size = *bytes;
+	reply.size = SKL_ADSP_W1_SZ;
+
 	ret = sst_ipc_tx_message_wait(ipc, request, &reply);
 	if (ret < 0)
 		dev_err(ipc->dev, "ipc: get large config fail, err: %d\n", ret);
 
+	reply.size = (reply.header >> 32) & IPC_DATA_OFFSET_SZ_MASK;
+	buf = krealloc(reply.data, reply.size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+	*payload = buf;
+	*bytes = reply.size;
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(skl_ipc_get_large_config);