plugin: alsaplug: pcm: Init the global context earlier

Initialize the shared memory for the global context during init so that
it can be used to store the kcontrol info during topology parsing. Move
the glb_ctx field from struct snd_sof_pcm to struct snd_sof_plug so that
it can be accessed during topology parsing.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Author: ranj063

tools/plugin/alsaplug/pcm.c

@@ -47,7 +47,6 @@ typedef struct snd_sof_pcm {
 	 /* pipeline IPC response queues */
 	struct plug_mq_desc pipeline_ipc_rx[TPLG_MAX_PCM_PIPELINES];
 
-	struct plug_shm_desc glb_ctx;
 	struct plug_shm_desc shm_pcm;
 
 	int frame_us;
@@ -550,29 +549,13 @@ static int plug_pcm_hw_params(snd_pcm_ioplug_t *io, snd_pcm_hw_params_t *params)
 		}
 	}
 
-	/* init global status shm name */
-	err = plug_shm_init(&pcm->glb_ctx, plug->tplg_file, "ctx", 0);
-	if (err < 0) {
-		SNDERR("error: invalid name for global SHM %s\n", plug->tplg_file);
-		return err;
-	}
-
 	/* init PCM shm name */
 	err = plug_shm_init(&pcm->shm_pcm, plug->tplg_file, "pcm", plug->pcm_id);
 	if (err < 0) {
 		SNDERR("error: invalid name for PCM SHM %s\n", plug->tplg_file);
 		return err;
 	}
 
-	/* open the global sof-pipe context via SHM */
-	pcm->glb_ctx.size = 128 * 1024;
-	err = plug_shm_open(&pcm->glb_ctx);
-	if (err < 0) {
-		SNDERR("error: failed to open sof-pipe context: %s:%s",
-		       pcm->glb_ctx.name, strerror(err));
-		return err;
-	}
-
 	/* open audio PCM SHM data endpoint */
 	err = plug_shm_open(&pcm->shm_pcm);
 	if (err < 0) {
@@ -585,7 +568,7 @@ static int plug_pcm_hw_params(snd_pcm_ioplug_t *io, snd_pcm_hw_params_t *params)
 	err = plug_init_shm_ctx(plug);
 	if (err < 0) {
 		SNDERR("error: failed to init sof-pipe ep context: %s:%s",
-		       pcm->glb_ctx.name, strerror(err));
+		       pcm->shm_pcm.name, strerror(err));
 		return -err;
 	}
 
@@ -652,7 +635,7 @@ static int plug_pcm_close(snd_pcm_ioplug_t *io)
 {
 	snd_sof_plug_t *plug = io->private_data;
 	snd_sof_pcm_t *pcm = plug->module_prv;
-	struct plug_shm_glb_state *ctx = pcm->glb_ctx.addr;
+	struct plug_shm_glb_state *ctx = plug->glb_ctx.addr;
 	int err = 0;
 
 	printf("%s %d\n", __func__, __LINE__);
@@ -692,7 +675,7 @@ static int plug_pcm_hw_free(snd_pcm_ioplug_t *io)
 		return ret;
 
 	close(pcm->shm_pcm.fd);
-	close(pcm->glb_ctx.fd);
+	close(plug->glb_ctx.fd);
 
 	for (i = 0; i < pipeline_list->count; i++) {
 		struct tplg_pipeline_info *pipe_info = pipeline_list->pipelines[i];
@@ -857,8 +840,7 @@ static int plug_create(snd_sof_plug_t *plug, snd_pcm_t **pcmp, const char *name,
 
 static int plug_init_shm_ctx(snd_sof_plug_t *plug)
 {
-	snd_sof_pcm_t *pcm = plug->module_prv;
-	struct plug_shm_glb_state *glb = pcm->glb_ctx.addr;
+	struct plug_shm_glb_state *glb = plug->glb_ctx.addr;
 	struct endpoint_hw_config *ep;
 	struct plug_cmdline_item *ci;
 	struct plug_config *pc;
@@ -932,6 +914,22 @@ static int plug_init_sof_pipe(snd_sof_plug_t *plug, snd_pcm_t **pcmp,
 	/* plugin only works with IPC4 */
 	plug->tplg.ipc_major = 4;
 
+	/* init global status hsm name */
+	err = plug_shm_init(&plug->glb_ctx, plug->tplg_file, "ctx", 0);
+	if (err < 0) {
+		SNDERR("error: invalid name for global SHM %s\n", plug->tplg_file);
+		return err;
+	}
+
+	/* open the global context via SHM */
+	plug->glb_ctx.size = 128 * 1024;
+	err = plug_shm_open(&plug->glb_ctx);
+	if (err < 0) {
+		SNDERR("error: failed to open plugin context: %s:%s",
+		       plug->glb_ctx.name, strerror(err));
+		return err;
+	}
+
 	/* parse topology file */
 	err = plug_parse_topology(plug);
 	if (err < 0) {

tools/plugin/alsaplug/plugin.h

@@ -42,6 +42,8 @@ typedef struct snd_sof_plug {
 	struct plug_mq_desc ipc_tx;
 	struct plug_mq_desc ipc_rx;
 
+	struct plug_shm_desc glb_ctx;
+
 	int pcm_id;
 	struct tplg_pcm_info *pcm_info;