From 66c2a6b0bc0b394d215768610d96f44cf97052ac Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Mon, 8 Dec 2008 23:02:45 -0300 Subject: [PATCH] V4L/DVB (9801): cx18: Allow more than 63 capture buffers in rotation per stream cx18: Allow more than 63 capture buffers in rotation per stream. Implement q_busy to hold buffers the firmware has for use. q_free holds truly unused buffers in a pool. New buffers are given to the firmware as soon as the firmware returns one, if there are any to give to the firmware. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-driver.h | 3 +- drivers/media/video/cx18/cx18-fileops.c | 14 ++--- drivers/media/video/cx18/cx18-ioctl.c | 3 +- drivers/media/video/cx18/cx18-mailbox.c | 11 +--- drivers/media/video/cx18/cx18-queue.c | 56 +++++++++--------- drivers/media/video/cx18/cx18-queue.h | 16 ++--- drivers/media/video/cx18/cx18-streams.c | 77 +++++++++++++++++++++---- drivers/media/video/cx18/cx18-streams.h | 3 + 8 files changed, 113 insertions(+), 70 deletions(-) diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h index f88d82348293..4d56d07195b6 100644 --- a/drivers/media/video/cx18/cx18-driver.h +++ b/drivers/media/video/cx18/cx18-driver.h @@ -289,7 +289,8 @@ struct cx18_stream { /* Buffer Queues */ struct cx18_queue q_free; /* free buffers */ - struct cx18_queue q_full; /* full buffers */ + struct cx18_queue q_busy; /* busy buffers - in use by firmware */ + struct cx18_queue q_full; /* full buffers - data for user apps */ /* DVB / Digital Transport */ struct cx18_dvb dvb; diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c index 504a1f9edec6..61192e62a80f 100644 --- a/drivers/media/video/cx18/cx18-fileops.c +++ b/drivers/media/video/cx18/cx18-fileops.c @@ -187,7 +187,7 @@ static struct cx18_buffer *cx18_get_buffer(struct cx18_stream *s, int non_block, while ((buf = cx18_dequeue(s_vbi, &s_vbi->q_full))) { /* byteswap and process VBI data */ /* cx18_process_vbi_data(cx, buf, s_vbi->dma_pts, s_vbi->type); */ - cx18_enqueue(s_vbi, buf, &s_vbi->q_free); + cx18_stream_put_buf_fw(s_vbi, buf); } } buf = &cx->vbi.sliced_mpeg_buf; @@ -361,15 +361,9 @@ static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf, tot_count - tot_written); if (buf != &cx->vbi.sliced_mpeg_buf) { - if (buf->readpos == buf->bytesused) { - cx18_buf_sync_for_device(s, buf); - cx18_enqueue(s, buf, &s->q_free); - cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, - s->handle, - (void __iomem *)&cx->scb->cpu_mdl[buf->id] - - cx->enc_mem, - 1, buf->id, s->buf_size); - } else + if (buf->readpos == buf->bytesused) + cx18_stream_put_buf_fw(s, buf); + else cx18_push(s, buf, &s->q_full); } else if (buf->readpos == buf->bytesused) { int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c index 8b2ec31b9421..ece799ec37aa 100644 --- a/drivers/media/video/cx18/cx18-ioctl.c +++ b/drivers/media/video/cx18/cx18-ioctl.c @@ -746,8 +746,7 @@ static int cx18_log_status(struct file *file, void *fh) continue; CX18_INFO("Stream %s: status 0x%04lx, %d%% of %d KiB (%d buffers) in use\n", s->name, s->s_flags, - (s->buffers - atomic_read(&s->q_free.buffers)) - * 100 / s->buffers, + atomic_read(&s->q_full.buffers) * 100 / s->buffers, (s->buffers * s->buf_size) / 1024, s->buffers); } CX18_INFO("Read MPEG/VBI: %lld/%lld bytes\n", diff --git a/drivers/media/video/cx18/cx18-mailbox.c b/drivers/media/video/cx18/cx18-mailbox.c index b013e817926a..9d8220539be8 100644 --- a/drivers/media/video/cx18/cx18-mailbox.c +++ b/drivers/media/video/cx18/cx18-mailbox.c @@ -189,16 +189,7 @@ static void epu_dma_done(struct cx18 *cx, struct cx18_epu_work_order *order) dvb_dmx_swfilter(&s->dvb.demux, buf->buf, buf->bytesused); - cx18_buf_sync_for_device(s, buf); - cx18_enqueue(s, buf, &s->q_free); - - if (s->handle != CX18_INVALID_TASK_HANDLE && - test_bit(CX18_F_S_STREAMING, &s->s_flags)) - cx18_vapi(cx, - CX18_CPU_DE_SET_MDL, 5, s->handle, - (void __iomem *) - &cx->scb->cpu_mdl[buf->id] - cx->enc_mem, - 1, buf->id, s->buf_size); + cx18_stream_put_buf_fw(s, buf); } else set_bit(CX18_F_B_NEED_BUF_SWAP, &buf->b_flags); } diff --git a/drivers/media/video/cx18/cx18-queue.c b/drivers/media/video/cx18/cx18-queue.c index fdfc83ee3d4e..40379d807cef 100644 --- a/drivers/media/video/cx18/cx18-queue.c +++ b/drivers/media/video/cx18/cx18-queue.c @@ -42,24 +42,32 @@ void cx18_queue_init(struct cx18_queue *q) q->bytesused = 0; } -void _cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf, - struct cx18_queue *q, int to_front) +struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf, + struct cx18_queue *q, int to_front) { - /* clear the buffer if it is going to be enqueued to the free queue */ - if (q == &s->q_free) { + /* clear the buffer if it is not to be enqueued to the full queue */ + if (q != &s->q_full) { buf->bytesused = 0; buf->readpos = 0; buf->b_flags = 0; buf->skipped = 0; } + mutex_lock(&s->qlock); + + /* q_busy is restricted to 63 buffers to stay within firmware limits */ + if (q == &s->q_busy && atomic_read(&q->buffers) >= 63) + q = &s->q_free; + if (to_front) list_add(&buf->list, &q->list); /* LIFO */ else list_add_tail(&buf->list, &q->list); /* FIFO */ - atomic_inc(&q->buffers); q->bytesused += buf->bytesused - buf->readpos; + atomic_inc(&q->buffers); + mutex_unlock(&s->qlock); + return q; } struct cx18_buffer *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q) @@ -70,9 +78,9 @@ struct cx18_buffer *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q) if (!list_empty(&q->list)) { buf = list_entry(q->list.next, struct cx18_buffer, list); list_del_init(q->list.next); - atomic_dec(&q->buffers); q->bytesused -= buf->bytesused - buf->readpos; buf->skipped = 0; + atomic_dec(&q->buffers); } mutex_unlock(&s->qlock); return buf; @@ -85,28 +93,30 @@ struct cx18_buffer *cx18_queue_get_buf(struct cx18_stream *s, u32 id, struct cx18_buffer *buf; struct cx18_buffer *ret = NULL; struct list_head *p, *t; - LIST_HEAD(r); mutex_lock(&s->qlock); - list_for_each_safe(p, t, &s->q_free.list) { + list_for_each_safe(p, t, &s->q_busy.list) { buf = list_entry(p, struct cx18_buffer, list); if (buf->id != id) { buf->skipped++; - if (buf->skipped >= atomic_read(&s->q_free.buffers)-1) { + if (buf->skipped >= atomic_read(&s->q_busy.buffers)-1) { /* buffer must have fallen out of rotation */ - atomic_dec(&s->q_free.buffers); - list_move_tail(&buf->list, &r); CX18_WARN("Skipped %s, buffer %d, %d " "times - it must have dropped out of " "rotation\n", s->name, buf->id, buf->skipped); + /* move it to q_free */ + list_move_tail(&buf->list, &s->q_free.list); + buf->bytesused = buf->readpos = buf->b_flags = + buf->skipped = 0; + atomic_dec(&s->q_busy.buffers); + atomic_inc(&s->q_free.buffers); } continue; } buf->bytesused = bytesused; - atomic_dec(&s->q_free.buffers); if (s->type == CX18_ENC_STREAM_TYPE_TS) { /* * TS doesn't use q_full, but for sweeping up lost @@ -116,28 +126,19 @@ struct cx18_buffer *cx18_queue_get_buf(struct cx18_stream *s, u32 id, */ list_del_init(&buf->list); } else { - atomic_inc(&s->q_full.buffers); - s->q_full.bytesused += buf->bytesused; list_move_tail(&buf->list, &s->q_full.list); + s->q_full.bytesused += buf->bytesused; + atomic_inc(&s->q_full.buffers); } + atomic_dec(&s->q_busy.buffers); ret = buf; break; } - mutex_unlock(&s->qlock); - /* Put lost buffers back into firmware transfer rotation */ - while (!list_empty(&r)) { - buf = list_entry(r.next, struct cx18_buffer, list); - list_del_init(r.next); - cx18_enqueue(s, buf, &s->q_free); - cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle, - (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, - 1, buf->id, s->buf_size); - CX18_INFO("Returning %s, buffer %d back to transfer rotation\n", - s->name, buf->id); - /* and there was much rejoicing... */ - } + /* Put more buffers into the transfer rotation from q_free, if we can */ + cx18_stream_load_fw_queue_nolock(s); + mutex_unlock(&s->qlock); return ret; } @@ -162,6 +163,7 @@ static void cx18_queue_flush(struct cx18_stream *s, struct cx18_queue *q) void cx18_flush_queues(struct cx18_stream *s) { + cx18_queue_flush(s, &s->q_busy); cx18_queue_flush(s, &s->q_full); } diff --git a/drivers/media/video/cx18/cx18-queue.h b/drivers/media/video/cx18/cx18-queue.h index d184e55ce624..456cec3bc28f 100644 --- a/drivers/media/video/cx18/cx18-queue.h +++ b/drivers/media/video/cx18/cx18-queue.h @@ -43,21 +43,21 @@ static inline void cx18_buf_sync_for_device(struct cx18_stream *s, void cx18_buf_swap(struct cx18_buffer *buf); /* cx18_queue utility functions */ -void _cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf, - struct cx18_queue *q, int to_front); +struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf, + struct cx18_queue *q, int to_front); static inline -void cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf, - struct cx18_queue *q) +struct cx18_queue *cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf, + struct cx18_queue *q) { - _cx18_enqueue(s, buf, q, 0); /* FIFO */ + return _cx18_enqueue(s, buf, q, 0); /* FIFO */ } static inline -void cx18_push(struct cx18_stream *s, struct cx18_buffer *buf, - struct cx18_queue *q) +struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_buffer *buf, + struct cx18_queue *q) { - _cx18_enqueue(s, buf, q, 1); /* LIFO */ + return _cx18_enqueue(s, buf, q, 1); /* LIFO */ } void cx18_queue_init(struct cx18_queue *q); diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c index a1cf434f7975..6b0b7f751f20 100644 --- a/drivers/media/video/cx18/cx18-streams.c +++ b/drivers/media/video/cx18/cx18-streams.c @@ -127,16 +127,11 @@ static void cx18_stream_init(struct cx18 *cx, int type) s->buf_size = cx->stream_buf_size[type]; if (s->buf_size) s->buffers = max_size / s->buf_size; - if (s->buffers > 63) { - /* Each stream has a maximum of 63 buffers, - ensure we do not exceed that. */ - s->buffers = 63; - s->buf_size = (max_size / s->buffers) & ~0xfff; - } mutex_init(&s->qlock); init_waitqueue_head(&s->waitq); s->id = -1; cx18_queue_init(&s->q_free); + cx18_queue_init(&s->q_busy); cx18_queue_init(&s->q_full); } @@ -401,11 +396,61 @@ static void cx18_vbi_setup(struct cx18_stream *s) cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data); } +struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s, + struct cx18_buffer *buf) +{ + struct cx18 *cx = s->cx; + struct cx18_queue *q; + + /* Don't give it to the firmware, if we're not running a capture */ + if (s->handle == CX18_INVALID_TASK_HANDLE || + !test_bit(CX18_F_S_STREAMING, &s->s_flags)) + return cx18_enqueue(s, buf, &s->q_free); + + q = cx18_enqueue(s, buf, &s->q_busy); + if (q != &s->q_busy) + return q; /* The firmware has the max buffers it can handle */ + + cx18_buf_sync_for_device(s, buf); + cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle, + (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem, + 1, buf->id, s->buf_size); + return q; +} + +/* Must hold s->qlock when calling */ +void cx18_stream_load_fw_queue_nolock(struct cx18_stream *s) +{ + struct cx18_buffer *buf; + struct cx18 *cx = s->cx; + + /* Move from q_free to q_busy notifying the firmware: 63 buf limit */ + while (s->handle != CX18_INVALID_TASK_HANDLE && + test_bit(CX18_F_S_STREAMING, &s->s_flags) && + atomic_read(&s->q_busy.buffers) < 63 && + !list_empty(&s->q_free.list)) { + + /* Move from q_free to q_busy */ + buf = list_entry(s->q_free.list.next, struct cx18_buffer, list); + list_move_tail(&buf->list, &s->q_busy.list); + buf->bytesused = buf->readpos = buf->b_flags = buf->skipped = 0; + atomic_dec(&s->q_free.buffers); + atomic_inc(&s->q_busy.buffers); + + /* Notify firmware */ + cx18_buf_sync_for_device(s, buf); + cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle, + (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem, + 1, buf->id, s->buf_size); + } +} + int cx18_start_v4l2_encode_stream(struct cx18_stream *s) { u32 data[MAX_MB_ARGUMENTS]; struct cx18 *cx = s->cx; struct list_head *p; + struct cx18_buffer *buf; int ts = 0; int captype = 0; @@ -488,16 +533,18 @@ int cx18_start_v4l2_encode_stream(struct cx18_stream *s) (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem, (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem); + /* Init all the cpu_mdls for this stream */ + cx18_flush_queues(s); + mutex_lock(&s->qlock); list_for_each(p, &s->q_free.list) { - struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list); - + buf = list_entry(p, struct cx18_buffer, list); cx18_writel(cx, buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr); cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length); - cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle, - (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, - 1, buf->id, s->buf_size); } + cx18_stream_load_fw_queue_nolock(s); + mutex_unlock(&s->qlock); + /* begin_capture */ if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) { CX18_DEBUG_WARN("Error starting capture!\n"); @@ -506,9 +553,15 @@ int cx18_start_v4l2_encode_stream(struct cx18_stream *s) cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1); else cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle); + clear_bit(CX18_F_S_STREAMING, &s->s_flags); + /* FIXME - CX18_F_S_STREAMOFF as well? */ cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle); cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle); - /* FIXME - clean-up DSP0_INT mask, i_flags, s_flags, etc. */ + s->handle = CX18_INVALID_TASK_HANDLE; + if (atomic_read(&cx->tot_capturing) == 0) { + set_bit(CX18_F_I_EOS, &cx->i_flags); + cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK); + } return -EINVAL; } diff --git a/drivers/media/video/cx18/cx18-streams.h b/drivers/media/video/cx18/cx18-streams.h index 7218b15045bf..635d34b75ab1 100644 --- a/drivers/media/video/cx18/cx18-streams.h +++ b/drivers/media/video/cx18/cx18-streams.h @@ -29,6 +29,9 @@ int cx18_streams_register(struct cx18 *cx); void cx18_streams_cleanup(struct cx18 *cx, int unregister); /* Capture related */ +void cx18_stream_load_fw_queue_nolock(struct cx18_stream *s); +struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s, + struct cx18_buffer *buf); int cx18_start_v4l2_encode_stream(struct cx18_stream *s); int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end); -- 2.20.1