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Subject[PATCH 18/29] staging: bcm2835-audio: Make single vchi handle
Date
The bcm2835_audio_instance object contains the array of
VCHI_SERVICE_HANDLE_T, while the code assumes and uses only the first
element explicitly. Let's reduce to a single vchi handle for
simplifying the code.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
.../bcm2835-audio/bcm2835-vchiq.c | 170 ++++++------------
1 file changed, 58 insertions(+), 112 deletions(-)

diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
index 488e676e25e1..be76f97705f4 100644
--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
@@ -44,8 +44,7 @@
#endif

struct bcm2835_audio_instance {
- unsigned int num_connections;
- VCHI_SERVICE_HANDLE_T vchi_handle[VCHI_MAX_NUM_CONNECTIONS];
+ VCHI_SERVICE_HANDLE_T vchi_handle;
struct completion msg_avail_comp;
struct mutex vchi_mutex;
struct bcm2835_alsa_stream *alsa_stream;
@@ -202,12 +201,12 @@ static void audio_vchi_callback(void *param,
BUG();
return;
}
- if (!instance->vchi_handle[0]) {
- LOG_ERR(" .. instance->vchi_handle[0] is null\n");
+ if (!instance->vchi_handle) {
+ LOG_ERR(" .. instance->vchi_handle is null\n");
BUG();
return;
}
- status = vchi_msg_dequeue(instance->vchi_handle[0],
+ status = vchi_msg_dequeue(instance->vchi_handle,
&m, sizeof(m), &msg_len, VCHI_FLAGS_NONE);
if (m.type == VC_AUDIO_MSG_TYPE_RESULT) {
LOG_DBG(" .. instance=%p, m.type=VC_AUDIO_MSG_TYPE_RESULT, success=%d\n",
@@ -237,102 +236,61 @@ static void audio_vchi_callback(void *param,

static struct bcm2835_audio_instance *
vc_vchi_audio_init(VCHI_INSTANCE_T vchi_instance,
- VCHI_CONNECTION_T **vchi_connections,
- unsigned int num_connections)
+ VCHI_CONNECTION_T *vchi_connection)
{
- unsigned int i;
+ SERVICE_CREATION_T params = {
+ .version = VCHI_VERSION_EX(VC_AUDIOSERV_VER, VC_AUDIOSERV_MIN_VER),
+ .service_id = VC_AUDIO_SERVER_NAME,
+ .connection = vchi_connection,
+ .rx_fifo_size = 0,
+ .tx_fifo_size = 0,
+ .callback = audio_vchi_callback,
+ .want_unaligned_bulk_rx = 1, //TODO: remove VCOS_FALSE
+ .want_unaligned_bulk_tx = 1, //TODO: remove VCOS_FALSE
+ .want_crc = 0
+ };
struct bcm2835_audio_instance *instance;
int status;
- int ret;
-
- LOG_DBG("%s: start", __func__);

- if (num_connections > VCHI_MAX_NUM_CONNECTIONS) {
- LOG_ERR("%s: unsupported number of connections %u (max=%u)\n",
- __func__, num_connections, VCHI_MAX_NUM_CONNECTIONS);
-
- return ERR_PTR(-EINVAL);
- }
/* Allocate memory for this instance */
instance = kzalloc(sizeof(*instance), GFP_KERNEL);
if (!instance)
return ERR_PTR(-ENOMEM);

- instance->num_connections = num_connections;
-
/* Create a lock for exclusive, serialized VCHI connection access */
mutex_init(&instance->vchi_mutex);
/* Open the VCHI service connections */
- for (i = 0; i < num_connections; i++) {
- SERVICE_CREATION_T params = {
- .version = VCHI_VERSION_EX(VC_AUDIOSERV_VER, VC_AUDIOSERV_MIN_VER),
- .service_id = VC_AUDIO_SERVER_NAME,
- .connection = vchi_connections[i],
- .rx_fifo_size = 0,
- .tx_fifo_size = 0,
- .callback = audio_vchi_callback,
- .callback_param = instance,
- .want_unaligned_bulk_rx = 1, //TODO: remove VCOS_FALSE
- .want_unaligned_bulk_tx = 1, //TODO: remove VCOS_FALSE
- .want_crc = 0
- };
-
- LOG_DBG("%s: about to open %i\n", __func__, i);
- status = vchi_service_open(vchi_instance, &params,
- &instance->vchi_handle[i]);
-
- LOG_DBG("%s: opened %i: %p=%d\n", __func__, i, instance->vchi_handle[i], status);
- if (status) {
- LOG_ERR("%s: failed to open VCHI service connection (status=%d)\n",
- __func__, status);
- ret = -EPERM;
- goto err_close_services;
- }
- /* Finished with the service for now */
- vchi_service_release(instance->vchi_handle[i]);
- }
+ params.callback_param = instance,

- LOG_DBG("%s: okay\n", __func__);
- return instance;
+ status = vchi_service_open(vchi_instance, &params,
+ &instance->vchi_handle);

-err_close_services:
- for (i = 0; i < instance->num_connections; i++) {
- LOG_ERR("%s: closing %i: %p\n", __func__, i, instance->vchi_handle[i]);
- if (instance->vchi_handle[i])
- vchi_service_close(instance->vchi_handle[i]);
+ if (status) {
+ LOG_ERR("%s: failed to open VCHI service connection (status=%d)\n",
+ __func__, status);
+ kfree(instance);
+ return ERR_PTR(-EPERM);
}

- kfree(instance);
- LOG_ERR("%s: error\n", __func__);
+ /* Finished with the service for now */
+ vchi_service_release(instance->vchi_handle);

- return ERR_PTR(ret);
+ return instance;
}

static int vc_vchi_audio_deinit(struct bcm2835_audio_instance *instance)
{
- unsigned int i;
-
- if (!instance) {
- LOG_ERR("%s: invalid handle %p\n", __func__, instance);
-
- return -1;
- }
+ int status;

- LOG_DBG(" .. about to lock (%d)\n", instance->num_connections);
mutex_lock(&instance->vchi_mutex);

/* Close all VCHI service connections */
- for (i = 0; i < instance->num_connections; i++) {
- int status;
-
- LOG_DBG(" .. %i:closing %p\n", i, instance->vchi_handle[i]);
- vchi_service_use(instance->vchi_handle[i]);
+ vchi_service_use(instance->vchi_handle);

- status = vchi_service_close(instance->vchi_handle[i]);
- if (status) {
- LOG_DBG("%s: failed to close VCHI service connection (status=%d)\n",
- __func__, status);
- }
+ status = vchi_service_close(instance->vchi_handle);
+ if (status) {
+ LOG_DBG("%s: failed to close VCHI service connection (status=%d)\n",
+ __func__, status);
}

mutex_unlock(&instance->vchi_mutex);
@@ -383,19 +341,9 @@ static int bcm2835_audio_open_connection(struct bcm2835_alsa_stream *alsa_stream
(struct bcm2835_audio_instance *)alsa_stream->instance;
struct bcm2835_vchi_ctx *vhci_ctx = alsa_stream->chip->vchi_ctx;

- LOG_INFO("%s: start\n", __func__);
- BUG_ON(instance);
- if (instance) {
- LOG_ERR("%s: VCHI instance already open (%p)\n",
- __func__, instance);
- instance->alsa_stream = alsa_stream;
- alsa_stream->instance = instance;
- return 0;
- }
-
/* Initialize an instance of the audio service */
instance = vc_vchi_audio_init(vhci_ctx->vchi_instance,
- &vhci_ctx->vchi_connection, 1);
+ vhci_ctx->vchi_connection);

if (IS_ERR(instance)) {
LOG_ERR("%s: failed to initialize audio service\n", __func__);
@@ -407,8 +355,6 @@ static int bcm2835_audio_open_connection(struct bcm2835_alsa_stream *alsa_stream
instance->alsa_stream = alsa_stream;
alsa_stream->instance = instance;

- LOG_DBG(" success !\n");
-
return 0;
}

@@ -431,12 +377,12 @@ int bcm2835_audio_open(struct bcm2835_alsa_stream *alsa_stream)
LOG_DBG(" instance (%p)\n", instance);

mutex_lock(&instance->vchi_mutex);
- vchi_service_use(instance->vchi_handle[0]);
+ vchi_service_use(instance->vchi_handle);

m.type = VC_AUDIO_MSG_TYPE_OPEN;

/* Send the message to the videocore */
- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
&m, sizeof(m));

if (status) {
@@ -450,7 +396,7 @@ int bcm2835_audio_open(struct bcm2835_alsa_stream *alsa_stream)
ret = 0;

unlock:
- vchi_service_release(instance->vchi_handle[0]);
+ vchi_service_release(instance->vchi_handle);
mutex_unlock(&instance->vchi_mutex);

free_wq:
@@ -472,7 +418,7 @@ int bcm2835_audio_set_ctls(struct bcm2835_alsa_stream *alsa_stream)
chip->dest, chip->volume);

mutex_lock(&instance->vchi_mutex);
- vchi_service_use(instance->vchi_handle[0]);
+ vchi_service_use(instance->vchi_handle);

instance->result = -1;

@@ -487,7 +433,7 @@ int bcm2835_audio_set_ctls(struct bcm2835_alsa_stream *alsa_stream)
init_completion(&instance->msg_avail_comp);

/* Send the message to the videocore */
- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
&m, sizeof(m));

if (status) {
@@ -511,7 +457,7 @@ int bcm2835_audio_set_ctls(struct bcm2835_alsa_stream *alsa_stream)
ret = 0;

unlock:
- vchi_service_release(instance->vchi_handle[0]);
+ vchi_service_release(instance->vchi_handle);
mutex_unlock(&instance->vchi_mutex);

return ret;
@@ -537,7 +483,7 @@ int bcm2835_audio_set_params(struct bcm2835_alsa_stream *alsa_stream,
}

mutex_lock(&instance->vchi_mutex);
- vchi_service_use(instance->vchi_handle[0]);
+ vchi_service_use(instance->vchi_handle);

instance->result = -1;

@@ -550,7 +496,7 @@ int bcm2835_audio_set_params(struct bcm2835_alsa_stream *alsa_stream,
init_completion(&instance->msg_avail_comp);

/* Send the message to the videocore */
- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
&m, sizeof(m));

if (status) {
@@ -574,7 +520,7 @@ int bcm2835_audio_set_params(struct bcm2835_alsa_stream *alsa_stream,
ret = 0;

unlock:
- vchi_service_release(instance->vchi_handle[0]);
+ vchi_service_release(instance->vchi_handle);
mutex_unlock(&instance->vchi_mutex);

return ret;
@@ -588,12 +534,12 @@ static int bcm2835_audio_start_worker(struct bcm2835_alsa_stream *alsa_stream)
int ret;

mutex_lock(&instance->vchi_mutex);
- vchi_service_use(instance->vchi_handle[0]);
+ vchi_service_use(instance->vchi_handle);

m.type = VC_AUDIO_MSG_TYPE_START;

/* Send the message to the videocore */
- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
&m, sizeof(m));

if (status) {
@@ -607,7 +553,7 @@ static int bcm2835_audio_start_worker(struct bcm2835_alsa_stream *alsa_stream)
ret = 0;

unlock:
- vchi_service_release(instance->vchi_handle[0]);
+ vchi_service_release(instance->vchi_handle);
mutex_unlock(&instance->vchi_mutex);
return ret;
}
@@ -620,13 +566,13 @@ static int bcm2835_audio_stop_worker(struct bcm2835_alsa_stream *alsa_stream)
int ret;

mutex_lock(&instance->vchi_mutex);
- vchi_service_use(instance->vchi_handle[0]);
+ vchi_service_use(instance->vchi_handle);

m.type = VC_AUDIO_MSG_TYPE_STOP;
m.u.stop.draining = alsa_stream->draining;

/* Send the message to the videocore */
- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
&m, sizeof(m));

if (status) {
@@ -640,7 +586,7 @@ static int bcm2835_audio_stop_worker(struct bcm2835_alsa_stream *alsa_stream)
ret = 0;

unlock:
- vchi_service_release(instance->vchi_handle[0]);
+ vchi_service_release(instance->vchi_handle);
mutex_unlock(&instance->vchi_mutex);
return ret;
}
@@ -655,7 +601,7 @@ int bcm2835_audio_close(struct bcm2835_alsa_stream *alsa_stream)
my_workqueue_quit(alsa_stream);

mutex_lock(&instance->vchi_mutex);
- vchi_service_use(instance->vchi_handle[0]);
+ vchi_service_use(instance->vchi_handle);

m.type = VC_AUDIO_MSG_TYPE_CLOSE;

@@ -663,7 +609,7 @@ int bcm2835_audio_close(struct bcm2835_alsa_stream *alsa_stream)
init_completion(&instance->msg_avail_comp);

/* Send the message to the videocore */
- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
&m, sizeof(m));

if (status) {
@@ -687,7 +633,7 @@ int bcm2835_audio_close(struct bcm2835_alsa_stream *alsa_stream)
ret = 0;

unlock:
- vchi_service_release(instance->vchi_handle[0]);
+ vchi_service_release(instance->vchi_handle);
mutex_unlock(&instance->vchi_mutex);

/* Stop the audio service */
@@ -708,10 +654,10 @@ static int bcm2835_audio_write_worker(struct bcm2835_alsa_stream *alsa_stream,
LOG_INFO(" Writing %d bytes from %p\n", count, src);

mutex_lock(&instance->vchi_mutex);
- vchi_service_use(instance->vchi_handle[0]);
+ vchi_service_use(instance->vchi_handle);

if (instance->peer_version == 0 &&
- vchi_get_peer_version(instance->vchi_handle[0], &instance->peer_version) == 0)
+ vchi_get_peer_version(instance->vchi_handle, &instance->peer_version) == 0)
LOG_DBG("%s: client version %d connected\n", __func__, instance->peer_version);

m.type = VC_AUDIO_MSG_TYPE_WRITE;
@@ -723,7 +669,7 @@ static int bcm2835_audio_write_worker(struct bcm2835_alsa_stream *alsa_stream,
m.u.write.silence = src == NULL;

/* Send the message to the videocore */
- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
&m, sizeof(m));

if (status) {
@@ -736,7 +682,7 @@ static int bcm2835_audio_write_worker(struct bcm2835_alsa_stream *alsa_stream,
if (!m.u.write.silence) {
if (!m.u.write.max_packet) {
/* Send the message to the videocore */
- status = vchi_bulk_queue_transmit(instance->vchi_handle[0],
+ status = vchi_bulk_queue_transmit(instance->vchi_handle,
src, count,
0 * VCHI_FLAGS_BLOCK_UNTIL_QUEUED
+
@@ -746,7 +692,7 @@ static int bcm2835_audio_write_worker(struct bcm2835_alsa_stream *alsa_stream,
while (count > 0) {
int bytes = min_t(int, m.u.write.max_packet, count);

- status = bcm2835_vchi_msg_queue(instance->vchi_handle[0],
+ status = bcm2835_vchi_msg_queue(instance->vchi_handle,
src, bytes);
src = (char *)src + bytes;
count -= bytes;
@@ -763,7 +709,7 @@ static int bcm2835_audio_write_worker(struct bcm2835_alsa_stream *alsa_stream,
ret = 0;

unlock:
- vchi_service_release(instance->vchi_handle[0]);
+ vchi_service_release(instance->vchi_handle);
mutex_unlock(&instance->vchi_mutex);
return ret;
}
--
2.18.0
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