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Subject[RFC 18/50] staging: vc04_services: vc-sm-cma: Get rid of the multiple connections option
Date
Multiple connections are not handled by the IO thread, so it's not
really necessary to handle them on initialization.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
.../staging/vc04_services/vc-sm-cma/vc_sm.c | 3 +-
.../vc04_services/vc-sm-cma/vc_sm_cma_vchi.c | 67 ++++++-------------
.../vc04_services/vc-sm-cma/vc_sm_cma_vchi.h | 1 -
3 files changed, 23 insertions(+), 48 deletions(-)

diff --git a/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c b/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
index 3f95ea90c08a..e660f546a7e4 100644
--- a/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
@@ -1532,8 +1532,7 @@ static void vc_sm_connected_init(void)
}

/* Initialize an instance of the shared memory service. */
- sm_state->sm_handle = vc_sm_cma_vchi_init(instance, 1,
- vc_sm_vpu_event);
+ sm_state->sm_handle = vc_sm_cma_vchi_init(instance, vc_sm_vpu_event);
if (!sm_state->sm_handle) {
pr_err("[%s]: failed to initialize shared memory service\n",
__func__);
diff --git a/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.c b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.c
index 32706eb2838b..72b09685db31 100644
--- a/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.c
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.c
@@ -46,8 +46,7 @@ struct sm_cmd_rsp_blk {
};

struct sm_instance {
- u32 num_connections;
- struct vchi_service *service[VCHI_MAX_NUM_CONNECTIONS];
+ struct vchi_service *service;
struct task_struct *io_thread;
struct completion io_cmplt;

@@ -187,13 +186,13 @@ static int vc_sm_cma_vchi_videocore_io(void *arg)

while (1) {
if (svc_use)
- vchi_service_release(instance->service[0]);
+ vchi_service_release(instance->service);
svc_use = 0;

if (wait_for_completion_interruptible(&instance->io_cmplt))
continue;

- vchi_service_use(instance->service[0]);
+ vchi_service_use(instance->service);
svc_use = 1;

do {
@@ -214,7 +213,7 @@ static int vc_sm_cma_vchi_videocore_io(void *arg)

/* Send the command */
status =
- bcm2835_vchi_msg_queue(instance->service[0],
+ bcm2835_vchi_msg_queue(instance->service,
cmd->msg, cmd->length);
if (status) {
pr_err("%s: failed to queue message (%d)",
@@ -237,7 +236,7 @@ static int vc_sm_cma_vchi_videocore_io(void *arg)

} while (1);

- while (!vchi_msg_hold(instance->service[0], (void **)&reply,
+ while (!vchi_msg_hold(instance->service, (void **)&reply,
&reply_len, VCHI_FLAGS_NONE, &msg)) {
if (reply->trans_id & 0x80000000) {
/* Async event or cmd from the VPU */
@@ -286,21 +285,20 @@ static void vc_sm_cma_vchi_callback(void *param,
}

struct sm_instance *vc_sm_cma_vchi_init(struct vchiq_instance *vchiq_instance,
- unsigned int num_connections,
vpu_event_cb vpu_event)
{
- u32 i;
+ struct service_creation params = {
+ .version = VCHI_VERSION_EX(VC_SM_VER, VC_SM_MIN_VER),
+ .service_id = VC_SM_SERVER_NAME,
+ .callback = vc_sm_cma_vchi_callback,
+ .callback_param = NULL,
+ };
struct sm_instance *instance;
int status;
+ int i;

pr_debug("%s: start", __func__);

- if (num_connections > VCHI_MAX_NUM_CONNECTIONS) {
- pr_err("%s: unsupported number of connections %u (max=%u)",
- __func__, num_connections, VCHI_MAX_NUM_CONNECTIONS);
-
- goto err_null;
- }
/* Allocate memory for this instance */
instance = kzalloc(sizeof(*instance), GFP_KERNEL);

@@ -317,25 +315,15 @@ struct sm_instance *vc_sm_cma_vchi_init(struct vchiq_instance *vchiq_instance,
init_completion(&instance->free_blk[i].cmplt);
list_add(&instance->free_blk[i].head, &instance->free_list);
}
+ params.callback_param = instance;

/* Open the VCHI service connections */
- instance->num_connections = num_connections;
- for (i = 0; i < num_connections; i++) {
- struct service_creation params = {
- .version = VCHI_VERSION_EX(VC_SM_VER, VC_SM_MIN_VER),
- .service_id = VC_SM_SERVER_NAME,
- .callback = vc_sm_cma_vchi_callback,
- .callback_param = instance,
- };
-
- status = vchi_service_open(vchiq_instance,
- &params, &instance->service[i]);
- if (status) {
- pr_err("%s: failed to open VCHI service (%d)",
- __func__, status);
-
- goto err_close_services;
- }
+ status = vchi_service_open(vchiq_instance, &params, &instance->service);
+ if (status) {
+ pr_err("%s: failed to open VCHI service (%d)",
+ __func__, status);
+
+ goto err_close_services;
}

/* Create the thread which takes care of all io to/from videoocore. */
@@ -354,12 +342,8 @@ struct sm_instance *vc_sm_cma_vchi_init(struct vchiq_instance *vchiq_instance,
return instance;

err_close_services:
- for (i = 0; i < instance->num_connections; i++) {
- if (instance->service[i])
- vchi_service_close(instance->service[i]);
- }
+ vchi_service_close(instance->service);
kfree(instance);
-err_null:
pr_debug("%s: FAILED", __func__);
return NULL;
}
@@ -367,7 +351,6 @@ struct sm_instance *vc_sm_cma_vchi_init(struct vchiq_instance *vchiq_instance,
int vc_sm_cma_vchi_stop(struct sm_instance **handle)
{
struct sm_instance *instance;
- u32 i;

if (!handle) {
pr_err("%s: invalid pointer to handle %p", __func__, handle);
@@ -381,14 +364,8 @@ int vc_sm_cma_vchi_stop(struct sm_instance **handle)

instance = *handle;

- /* Close all VCHI service connections */
- for (i = 0; i < instance->num_connections; i++) {
- s32 success;
-
- vchi_service_use(instance->service[i]);
-
- success = vchi_service_close(instance->service[i]);
- }
+ vchi_service_use(instance->service);
+ vchi_service_close(instance->service);

kfree(instance);

diff --git a/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h
index 44cc389364f4..09ef0fc59566 100644
--- a/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h
@@ -29,7 +29,6 @@ typedef void (*vpu_event_cb)(struct sm_instance *instance,
* Initialize the shared memory service, opens up vchi connection to talk to it.
*/
struct sm_instance *vc_sm_cma_vchi_init(struct vchiq_instance *vchiq_instance,
- unsigned int num_connections,
vpu_event_cb vpu_event);

/*
--
2.26.2
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