diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0392-staging-bcm2835-camera-Do-not-bulk-receive-from-serv.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0392-staging-bcm2835-camera-Do-not-bulk-receive-from-serv.patch | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0392-staging-bcm2835-camera-Do-not-bulk-receive-from-serv.patch b/target/linux/brcm2708/patches-4.14/950-0392-staging-bcm2835-camera-Do-not-bulk-receive-from-serv.patch deleted file mode 100644 index 12cce81eae..0000000000 --- a/target/linux/brcm2708/patches-4.14/950-0392-staging-bcm2835-camera-Do-not-bulk-receive-from-serv.patch +++ /dev/null @@ -1,197 +0,0 @@ -From 2324b6fff518bebf6ec6363afe932c227f9d0b09 Mon Sep 17 00:00:00 2001 -From: Dave Stevenson <dave.stevenson@raspberrypi.org> -Date: Wed, 14 Feb 2018 17:04:26 +0000 -Subject: [PATCH 392/454] staging: bcm2835-camera: Do not bulk receive from - service thread - -vchi_bulk_queue_receive will queue up to a default of 4 -bulk receives on a connection before blocking. -If called from the VCHI service_callback thread, then -that thread is unable to service the VCHI_CALLBACK_BULK_RECEIVED -events that would enable the queue call to succeed. - -Add a workqueue to schedule the call vchi_bulk_queue_receive -in an alternate context to avoid the lock up. - -Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> ---- - .../vc04_services/bcm2835-camera/mmal-vchiq.c | 101 ++++++++++-------- - 1 file changed, 59 insertions(+), 42 deletions(-) - ---- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c -+++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c -@@ -118,8 +118,10 @@ struct mmal_msg_context { - - union { - struct { -- /* work struct for defered callback - must come first */ -+ /* work struct for buffer_cb callback */ - struct work_struct work; -+ /* work struct for deferred callback */ -+ struct work_struct buffer_to_host_work; - /* mmal instance */ - struct vchiq_mmal_instance *instance; - /* mmal port */ -@@ -174,6 +176,9 @@ struct vchiq_mmal_instance { - /* component to use next */ - int component_idx; - struct vchiq_mmal_component component[VCHIQ_MMAL_MAX_COMPONENTS]; -+ -+ /* ordered workqueue to process all bulk operations */ -+ struct workqueue_struct *bulk_wq; - }; - - static int __must_check -@@ -320,7 +325,44 @@ static void buffer_work_cb(struct work_s - msg_context->u.bulk.mmal_flags, - msg_context->u.bulk.dts, - msg_context->u.bulk.pts); -+} -+ -+/* workqueue scheduled callback to handle receiving buffers -+ * -+ * VCHI will allow up to 4 bulk receives to be scheduled before blocking. -+ * If we block in the service_callback context then we can't process the -+ * VCHI_CALLBACK_BULK_RECEIVED message that would otherwise allow the blocked -+ * vchi_bulk_queue_receive() call to complete. -+ */ -+static void buffer_to_host_work_cb(struct work_struct *work) -+{ -+ struct mmal_msg_context *msg_context = -+ container_of(work, struct mmal_msg_context, -+ u.bulk.buffer_to_host_work); -+ struct vchiq_mmal_instance *instance = msg_context->instance; -+ unsigned long len = msg_context->u.bulk.buffer_used; -+ int ret; - -+ if (!len) -+ /* Dummy receive to ensure the buffers remain in order */ -+ len = 8; -+ /* queue the bulk submission */ -+ vchi_service_use(instance->handle); -+ ret = vchi_bulk_queue_receive(instance->handle, -+ msg_context->u.bulk.buffer->buffer, -+ /* Actual receive needs to be a multiple -+ * of 4 bytes -+ */ -+ (len + 3) & ~3, -+ VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE | -+ VCHI_FLAGS_BLOCK_UNTIL_QUEUED, -+ msg_context); -+ -+ vchi_service_release(instance->handle); -+ -+ if (ret != 0) -+ pr_err("%s: ctx: %p, vchi_bulk_queue_receive failed %d\n", -+ __func__, msg_context, ret); - } - - /* enqueue a bulk receive for a given message context */ -@@ -329,7 +371,6 @@ static int bulk_receive(struct vchiq_mma - struct mmal_msg_context *msg_context) - { - unsigned long rd_len; -- int ret; - - rd_len = msg->u.buffer_from_host.buffer_header.length; - -@@ -365,45 +406,10 @@ static int bulk_receive(struct vchiq_mma - msg_context->u.bulk.dts = msg->u.buffer_from_host.buffer_header.dts; - msg_context->u.bulk.pts = msg->u.buffer_from_host.buffer_header.pts; - -- /* queue the bulk submission */ -- vchi_service_use(instance->handle); -- ret = vchi_bulk_queue_receive(instance->handle, -- msg_context->u.bulk.buffer->buffer, -- /* Actual receive needs to be a multiple -- * of 4 bytes -- */ -- (rd_len + 3) & ~3, -- VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE | -- VCHI_FLAGS_BLOCK_UNTIL_QUEUED, -- msg_context); -- -- vchi_service_release(instance->handle); -- -- return ret; --} -- --/* enque a dummy bulk receive for a given message context */ --static int dummy_bulk_receive(struct vchiq_mmal_instance *instance, -- struct mmal_msg_context *msg_context) --{ -- int ret; -- -- /* zero length indicates this was a dummy transfer */ -- msg_context->u.bulk.buffer_used = 0; -- -- /* queue the bulk submission */ -- vchi_service_use(instance->handle); -- -- ret = vchi_bulk_queue_receive(instance->handle, -- instance->bulk_scratch, -- 8, -- VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE | -- VCHI_FLAGS_BLOCK_UNTIL_QUEUED, -- msg_context); -+ queue_work(msg_context->instance->bulk_wq, -+ &msg_context->u.bulk.buffer_to_host_work); - -- vchi_service_release(instance->handle); -- -- return ret; -+ return 0; - } - - /* data in message, memcpy from packet into output buffer */ -@@ -451,6 +457,8 @@ buffer_from_host(struct vchiq_mmal_insta - - /* initialise work structure ready to schedule callback */ - INIT_WORK(&msg_context->u.bulk.work, buffer_work_cb); -+ INIT_WORK(&msg_context->u.bulk.buffer_to_host_work, -+ buffer_to_host_work_cb); - - /* prep the buffer from host message */ - memset(&m, 0xbc, sizeof(m)); /* just to make debug clearer */ -@@ -531,7 +539,7 @@ static void buffer_to_host_cb(struct vch - if (msg->u.buffer_from_host.buffer_header.flags & - MMAL_BUFFER_HEADER_FLAG_EOS) { - msg_context->u.bulk.status = -- dummy_bulk_receive(instance, msg_context); -+ bulk_receive(instance, msg, msg_context); - if (msg_context->u.bulk.status == 0) - return; /* successful bulk submission, bulk - * completion will trigger callback -@@ -1862,6 +1870,9 @@ int vchiq_mmal_finalise(struct vchiq_mma - - mutex_unlock(&instance->vchiq_mutex); - -+ flush_workqueue(instance->bulk_wq); -+ destroy_workqueue(instance->bulk_wq); -+ - vfree(instance->bulk_scratch); - - mmal_context_map_destroy(&instance->context_map); -@@ -1935,6 +1946,11 @@ int vchiq_mmal_init(struct vchiq_mmal_in - - params.callback_param = instance; - -+ instance->bulk_wq = alloc_ordered_workqueue("mmal-vchiq", -+ WQ_MEM_RECLAIM); -+ if (!instance->bulk_wq) -+ goto err_free; -+ - status = vchi_service_open(vchi_instance, ¶ms, &instance->handle); - if (status) { - pr_err("Failed to open VCHI service connection (status=%d)\n", -@@ -1949,8 +1965,9 @@ int vchiq_mmal_init(struct vchiq_mmal_in - return 0; - - err_close_services: -- - vchi_service_close(instance->handle); -+ destroy_workqueue(instance->bulk_wq); -+err_free: - vfree(instance->bulk_scratch); - kfree(instance); - return -ENODEV; |