ASoC: Intel: Skylake: Add support for Loadable modules

A module is loaded when the path consisting the module is opened.
The module binary(ies) is loaded from file system and cached in
kernel memory for future use. This is downloaded to DSP using DMA
and invoking Load module IPCs

This patch adds support for load/unload module IPCs, DMAing
modules and manging the modules

Signed-off-by: Dharageswari R <dharageswari.r@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/sound/soc/intel/skylake/skl-sst-ipc.c b/sound/soc/intel/skylake/skl-sst-ipc.c
index 95679c02c6ee..33860d2311c4 100644
--- a/sound/soc/intel/skylake/skl-sst-ipc.c
+++ b/sound/soc/intel/skylake/skl-sst-ipc.c
@@ -130,6 +130,11 @@
 #define IPC_SRC_QUEUE_MASK		0x7
 #define IPC_SRC_QUEUE(x)		(((x) & IPC_SRC_QUEUE_MASK) \
 					<< IPC_SRC_QUEUE_SHIFT)
+/* Load Module count */
+#define IPC_LOAD_MODULE_SHIFT		0
+#define IPC_LOAD_MODULE_MASK		0xFF
+#define IPC_LOAD_MODULE_CNT(x)		(((x) & IPC_LOAD_MODULE_MASK) \
+					<< IPC_LOAD_MODULE_SHIFT)
 
 /* Save pipeline messgae extension register */
 #define IPC_DMA_ID_SHIFT		0
@@ -728,6 +733,54 @@ int skl_ipc_bind_unbind(struct sst_generic_ipc *ipc,
 }
 EXPORT_SYMBOL_GPL(skl_ipc_bind_unbind);
 
+/*
+ * In order to load a module we need to send IPC to initiate that. DMA will
+ * performed to load the module memory. The FW supports multiple module load
+ * at single shot, so we can send IPC with N modules represented by
+ * module_cnt
+ */
+int skl_ipc_load_modules(struct sst_generic_ipc *ipc,
+				u8 module_cnt, void *data)
+{
+	struct skl_ipc_header header = {0};
+	u64 *ipc_header = (u64 *)(&header);
+	int ret;
+
+	header.primary = IPC_MSG_TARGET(IPC_FW_GEN_MSG);
+	header.primary |= IPC_MSG_DIR(IPC_MSG_REQUEST);
+	header.primary |= IPC_GLB_TYPE(IPC_GLB_LOAD_MULTIPLE_MODS);
+	header.primary |= IPC_LOAD_MODULE_CNT(module_cnt);
+
+	ret = sst_ipc_tx_message_wait(ipc, *ipc_header, data,
+				(sizeof(u16) * module_cnt), NULL, 0);
+	if (ret < 0)
+		dev_err(ipc->dev, "ipc: load modules failed :%d\n", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(skl_ipc_load_modules);
+
+int skl_ipc_unload_modules(struct sst_generic_ipc *ipc, u8 module_cnt,
+							void *data)
+{
+	struct skl_ipc_header header = {0};
+	u64 *ipc_header = (u64 *)(&header);
+	int ret;
+
+	header.primary = IPC_MSG_TARGET(IPC_FW_GEN_MSG);
+	header.primary |= IPC_MSG_DIR(IPC_MSG_REQUEST);
+	header.primary |= IPC_GLB_TYPE(IPC_GLB_UNLOAD_MULTIPLE_MODS);
+	header.primary |= IPC_LOAD_MODULE_CNT(module_cnt);
+
+	ret = sst_ipc_tx_message_wait(ipc, *ipc_header, data,
+				(sizeof(u16) * module_cnt), NULL, 0);
+	if (ret < 0)
+		dev_err(ipc->dev, "ipc: unload modules failed :%d\n", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(skl_ipc_unload_modules);
+
 int skl_ipc_set_large_config(struct sst_generic_ipc *ipc,
 		struct skl_ipc_large_config_msg *msg, u32 *param)
 {