V4L/DVB (5675): Move big PIO accesses from the interrupt handler to a workhandler
Sliced VBI transfers use PIO instead of DMA. This was done inside the
interrupt handler, but since PIO accesses are very slow this meant that
a lot of time was spent inside the interrupt handler. All PIO copies are
now moved to a workqueue. This should fix various issues with missing time
ticks and remote key hits.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/ivtv/ivtv-driver.c b/drivers/media/video/ivtv/ivtv-driver.c
index e29f949..efc6635 100644
--- a/drivers/media/video/ivtv/ivtv-driver.c
+++ b/drivers/media/video/ivtv/ivtv-driver.c
@@ -652,6 +652,7 @@
itv->dma_timer.data = (unsigned long)itv;
itv->cur_dma_stream = -1;
+ itv->cur_pio_stream = -1;
itv->audio_stereo_mode = AUDIO_STEREO;
itv->audio_bilingual_mode = AUDIO_MONO_LEFT;
diff --git a/drivers/media/video/ivtv/ivtv-driver.h b/drivers/media/video/ivtv/ivtv-driver.h
index 552f045..e6e56f1 100644
--- a/drivers/media/video/ivtv/ivtv-driver.h
+++ b/drivers/media/video/ivtv/ivtv-driver.h
@@ -237,6 +237,7 @@
#define IVTV_IRQ_ENC_VBI_CAP (0x1 << 29)
#define IVTV_IRQ_ENC_VIM_RST (0x1 << 28)
#define IVTV_IRQ_ENC_DMA_COMPLETE (0x1 << 27)
+#define IVTV_IRQ_ENC_PIO_COMPLETE (0x1 << 25)
#define IVTV_IRQ_DEC_AUD_MODE_CHG (0x1 << 24)
#define IVTV_IRQ_DEC_DATA_REQ (0x1 << 22)
#define IVTV_IRQ_DEC_DMA_COMPLETE (0x1 << 20)
@@ -247,7 +248,8 @@
#define IVTV_IRQ_DEC_VSYNC (0x1 << 10)
/* IRQ Masks */
-#define IVTV_IRQ_MASK_INIT (IVTV_IRQ_DMA_ERR|IVTV_IRQ_ENC_DMA_COMPLETE|IVTV_IRQ_DMA_READ)
+#define IVTV_IRQ_MASK_INIT (IVTV_IRQ_DMA_ERR|IVTV_IRQ_ENC_DMA_COMPLETE|\
+ IVTV_IRQ_DMA_READ|IVTV_IRQ_ENC_PIO_COMPLETE)
#define IVTV_IRQ_MASK_CAPTURE (IVTV_IRQ_ENC_START_CAP | IVTV_IRQ_ENC_EOS)
#define IVTV_IRQ_MASK_DECODE (IVTV_IRQ_DEC_DATA_REQ|IVTV_IRQ_DEC_AUD_MODE_CHG)
@@ -374,6 +376,9 @@
#define IVTV_F_S_STREAMOFF 7 /* signal end of stream EOS */
#define IVTV_F_S_APPL_IO 8 /* this stream is used read/written by an application */
+#define IVTV_F_S_PIO_PENDING 9 /* this stream has pending PIO */
+#define IVTV_F_S_PIO_HAS_VBI 1 /* the current PIO request also requests VBI data */
+
/* per-ivtv, i_flags */
#define IVTV_F_I_DMA 0 /* DMA in progress */
#define IVTV_F_I_UDMA 1 /* UDMA in progress */
@@ -390,8 +395,11 @@
#define IVTV_F_I_DECODING_YUV 12 /* this stream is YUV frame decoding */
#define IVTV_F_I_ENC_PAUSED 13 /* the encoder is paused */
#define IVTV_F_I_VALID_DEC_TIMINGS 14 /* last_dec_timing is valid */
-#define IVTV_F_I_WORK_HANDLER_VBI 15 /* there is work to be done for VBI */
-#define IVTV_F_I_WORK_HANDLER_YUV 16 /* there is work to be done for YUV */
+#define IVTV_F_I_HAVE_WORK 15 /* Used in the interrupt handler: there is work to be done */
+#define IVTV_F_I_WORK_HANDLER_VBI 16 /* there is work to be done for VBI */
+#define IVTV_F_I_WORK_HANDLER_YUV 17 /* there is work to be done for YUV */
+#define IVTV_F_I_WORK_HANDLER_PIO 18 /* there is work to be done for PIO */
+#define IVTV_F_I_PIO 19 /* PIO in progress */
/* Event notifications */
#define IVTV_F_I_EV_DEC_STOPPED 28 /* decoder stopped event */
@@ -484,6 +492,7 @@
/* Base Dev SG Array for cx23415/6 */
struct ivtv_SG_element *SGarray;
+ struct ivtv_SG_element *PIOarray;
dma_addr_t SG_handle;
int SG_length;
@@ -706,6 +715,7 @@
atomic_t decoding; /* count number of active decoding streams */
u32 irq_rr_idx; /* Round-robin stream index */
int cur_dma_stream; /* index of stream doing DMA */
+ int cur_pio_stream; /* index of stream doing PIO */
u32 dma_data_req_offset;
u32 dma_data_req_size;
int output_mode; /* NONE, MPG, YUV, UDMA YUV, passthrough */
diff --git a/drivers/media/video/ivtv/ivtv-irq.c b/drivers/media/video/ivtv/ivtv-irq.c
index c3a047b..ba98bf0 100644
--- a/drivers/media/video/ivtv/ivtv-irq.c
+++ b/drivers/media/video/ivtv/ivtv-irq.c
@@ -31,8 +31,6 @@
#define DMA_MAGIC_COOKIE 0x000001fe
-#define SLICED_VBI_PIO 1
-
static void ivtv_dma_dec_start(struct ivtv_stream *s);
static const int ivtv_stream_map[] = {
@@ -42,12 +40,40 @@
IVTV_ENC_STREAM_TYPE_VBI,
};
-static inline int ivtv_use_pio(struct ivtv_stream *s)
-{
- struct ivtv *itv = s->itv;
- return s->dma == PCI_DMA_NONE ||
- (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set);
+static void ivtv_pio_work_handler(struct ivtv *itv)
+{
+ struct ivtv_stream *s = &itv->streams[itv->cur_pio_stream];
+ struct ivtv_buffer *buf;
+ struct list_head *p;
+ int i = 0;
+
+ IVTV_DEBUG_DMA("ivtv_pio_work_handler\n");
+ if (itv->cur_pio_stream < 0 || itv->cur_pio_stream >= IVTV_MAX_STREAMS ||
+ s->v4l2dev == NULL || !ivtv_use_pio(s)) {
+ itv->cur_pio_stream = -1;
+ /* trigger PIO complete user interrupt */
+ write_reg(IVTV_IRQ_ENC_PIO_COMPLETE, 0x44);
+ return;
+ }
+ IVTV_DEBUG_DMA("Process PIO %s\n", s->name);
+ buf = list_entry(s->q_dma.list.next, struct ivtv_buffer, list);
+ list_for_each(p, &s->q_dma.list) {
+ struct ivtv_buffer *buf = list_entry(p, struct ivtv_buffer, list);
+ u32 size = s->PIOarray[i].size & 0x3ffff;
+
+ /* Copy the data from the card to the buffer */
+ if (s->type == IVTV_DEC_STREAM_TYPE_VBI) {
+ memcpy_fromio(buf->buf, itv->dec_mem + s->PIOarray[i].src - IVTV_DECODER_OFFSET, size);
+ }
+ else {
+ memcpy_fromio(buf->buf, itv->enc_mem + s->PIOarray[i].src, size);
+ }
+ if (s->PIOarray[i].size & 0x80000000)
+ break;
+ i++;
+ }
+ write_reg(IVTV_IRQ_ENC_PIO_COMPLETE, 0x44);
}
void ivtv_irq_work_handler(struct work_struct *work)
@@ -56,8 +82,11 @@
DEFINE_WAIT(wait);
+ if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_PIO, &itv->i_flags))
+ ivtv_pio_work_handler(itv);
+
if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_VBI, &itv->i_flags))
- vbi_work_handler(itv);
+ ivtv_vbi_work_handler(itv);
if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_YUV, &itv->i_flags))
ivtv_yuv_work_handler(itv);
@@ -173,8 +202,7 @@
}
s->buffers_stolen = rc;
- /* got the buffers, now fill in SGarray (DMA) or copy the data from the card
- to the buffers (PIO). */
+ /* got the buffers, now fill in SGarray (DMA) */
buf = list_entry(s->q_predma.list.next, struct ivtv_buffer, list);
memset(buf->buf, 0, 128);
list_for_each(p, &s->q_predma.list) {
@@ -182,21 +210,11 @@
if (skip_bufs-- > 0)
continue;
- if (!ivtv_use_pio(s)) {
- s->SGarray[idx].dst = cpu_to_le32(buf->dma_handle);
- s->SGarray[idx].src = cpu_to_le32(offset);
- s->SGarray[idx].size = cpu_to_le32(s->buf_size);
- }
+ s->SGarray[idx].dst = cpu_to_le32(buf->dma_handle);
+ s->SGarray[idx].src = cpu_to_le32(offset);
+ s->SGarray[idx].size = cpu_to_le32(s->buf_size);
buf->bytesused = (size < s->buf_size) ? size : s->buf_size;
- /* If PIO, then copy the data from the card to the buffer */
- if (s->type == IVTV_DEC_STREAM_TYPE_VBI) {
- memcpy_fromio(buf->buf, itv->dec_mem + offset - IVTV_DECODER_OFFSET, buf->bytesused);
- }
- else if (ivtv_use_pio(s)) {
- memcpy_fromio(buf->buf, itv->enc_mem + offset, buf->bytesused);
- }
-
s->q_predma.bytesused += buf->bytesused;
size -= buf->bytesused;
offset += s->buf_size;
@@ -224,11 +242,6 @@
u32 *u32buf;
int x = 0;
- if (ivtv_use_pio(s)) {
- if (s->q_predma.bytesused)
- ivtv_queue_move(s, &s->q_predma, NULL, &s->q_dma, s->q_predma.bytesused);
- s->SG_length = 0;
- }
IVTV_DEBUG_DMA("%s %s completed (%x)\n", ivtv_use_pio(s) ? "PIO" : "DMA",
s->name, s->dma_offset);
list_for_each(p, &s->q_dma.list) {
@@ -278,10 +291,14 @@
if (buf)
buf->bytesused += s->dma_last_offset;
if (buf && s->type == IVTV_DEC_STREAM_TYPE_VBI) {
- /* Parse and Groom VBI Data */
- s->q_dma.bytesused -= buf->bytesused;
- ivtv_process_vbi_data(itv, buf, 0, s->type);
- s->q_dma.bytesused += buf->bytesused;
+ list_for_each(p, &s->q_dma.list) {
+ buf = list_entry(p, struct ivtv_buffer, list);
+
+ /* Parse and Groom VBI Data */
+ s->q_dma.bytesused -= buf->bytesused;
+ ivtv_process_vbi_data(itv, buf, 0, s->type);
+ s->q_dma.bytesused += buf->bytesused;
+ }
if (s->id == -1) {
ivtv_queue_move(s, &s->q_dma, NULL, &s->q_free, 0);
return;
@@ -351,10 +368,14 @@
struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
int i;
+ IVTV_DEBUG_DMA("start %s for %s\n", ivtv_use_dma(s) ? "DMA" : "PIO", s->name);
+
if (s->q_predma.bytesused)
ivtv_queue_move(s, &s->q_predma, NULL, &s->q_dma, s->q_predma.bytesused);
- IVTV_DEBUG_DMA("start DMA for %s\n", s->name);
- s->SGarray[s->SG_length - 1].size = cpu_to_le32(le32_to_cpu(s->SGarray[s->SG_length - 1].size) + 256);
+
+ if (ivtv_use_dma(s))
+ s->SGarray[s->SG_length - 1].size =
+ cpu_to_le32(le32_to_cpu(s->SGarray[s->SG_length - 1].size) + 256);
/* If this is an MPEG stream, and VBI data is also pending, then append the
VBI DMA to the MPEG DMA and transfer both sets of data at once.
@@ -368,7 +389,8 @@
if (s->type == IVTV_ENC_STREAM_TYPE_MPG && s_vbi->SG_length &&
s->SG_length + s_vbi->SG_length <= s->buffers) {
ivtv_queue_move(s_vbi, &s_vbi->q_predma, NULL, &s_vbi->q_dma, s_vbi->q_predma.bytesused);
- s_vbi->SGarray[s_vbi->SG_length - 1].size = cpu_to_le32(le32_to_cpu(s_vbi->SGarray[s->SG_length - 1].size) + 256);
+ if (ivtv_use_dma(s_vbi))
+ s_vbi->SGarray[s_vbi->SG_length - 1].size = cpu_to_le32(le32_to_cpu(s_vbi->SGarray[s->SG_length - 1].size) + 256);
for (i = 0; i < s_vbi->SG_length; i++) {
s->SGarray[s->SG_length++] = s_vbi->SGarray[i];
}
@@ -381,14 +403,26 @@
/* Mark last buffer size for Interrupt flag */
s->SGarray[s->SG_length - 1].size |= cpu_to_le32(0x80000000);
- /* Sync Hardware SG List of buffers */
- ivtv_stream_sync_for_device(s);
- write_reg(s->SG_handle, IVTV_REG_ENCDMAADDR);
- write_reg_sync(read_reg(IVTV_REG_DMAXFER) | 0x02, IVTV_REG_DMAXFER);
- set_bit(IVTV_F_I_DMA, &itv->i_flags);
- itv->cur_dma_stream = s->type;
- itv->dma_timer.expires = jiffies + HZ / 10;
- add_timer(&itv->dma_timer);
+ if (ivtv_use_pio(s)) {
+ for (i = 0; i < s->SG_length; i++) {
+ s->PIOarray[i].src = le32_to_cpu(s->SGarray[i].src);
+ s->PIOarray[i].size = le32_to_cpu(s->SGarray[i].size);
+ }
+ set_bit(IVTV_F_I_WORK_HANDLER_PIO, &itv->i_flags);
+ set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags);
+ set_bit(IVTV_F_I_PIO, &itv->i_flags);
+ itv->cur_pio_stream = s->type;
+ }
+ else {
+ /* Sync Hardware SG List of buffers */
+ ivtv_stream_sync_for_device(s);
+ write_reg(s->SG_handle, IVTV_REG_ENCDMAADDR);
+ write_reg_sync(read_reg(IVTV_REG_DMAXFER) | 0x02, IVTV_REG_DMAXFER);
+ set_bit(IVTV_F_I_DMA, &itv->i_flags);
+ itv->cur_dma_stream = s->type;
+ itv->dma_timer.expires = jiffies + HZ / 10;
+ add_timer(&itv->dma_timer);
+ }
}
static void ivtv_dma_dec_start(struct ivtv_stream *s)
@@ -489,6 +523,40 @@
wake_up(&itv->dma_waitq);
}
+static void ivtv_irq_enc_pio_complete(struct ivtv *itv)
+{
+ struct ivtv_stream *s;
+
+ if (itv->cur_pio_stream < 0 || itv->cur_pio_stream >= IVTV_MAX_STREAMS) {
+ itv->cur_pio_stream = -1;
+ return;
+ }
+ s = &itv->streams[itv->cur_pio_stream];
+ IVTV_DEBUG_IRQ("ENC PIO COMPLETE %s\n", s->name);
+ s->SG_length = 0;
+ clear_bit(IVTV_F_I_ENC_VBI, &itv->i_flags);
+ clear_bit(IVTV_F_I_PIO, &itv->i_flags);
+ itv->cur_pio_stream = -1;
+ dma_post(s);
+ if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
+ ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0, 0);
+ else if (s->type == IVTV_ENC_STREAM_TYPE_YUV)
+ ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0, 1);
+ else if (s->type == IVTV_ENC_STREAM_TYPE_PCM)
+ ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0, 2);
+ clear_bit(IVTV_F_I_PIO, &itv->i_flags);
+ if (test_and_clear_bit(IVTV_F_S_DMA_HAS_VBI, &s->s_flags)) {
+ u32 tmp;
+
+ s = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
+ tmp = s->dma_offset;
+ s->dma_offset = itv->vbi.dma_offset;
+ dma_post(s);
+ s->dma_offset = tmp;
+ }
+ wake_up(&itv->dma_waitq);
+}
+
static void ivtv_irq_dma_err(struct ivtv *itv)
{
u32 data[CX2341X_MBOX_MAX_DATA];
@@ -532,13 +600,7 @@
clear_bit(IVTV_F_I_ENC_VBI, &itv->i_flags);
s = &itv->streams[ivtv_stream_map[data[0]]];
if (!stream_enc_dma_append(s, data)) {
- if (ivtv_use_pio(s)) {
- dma_post(s);
- ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0, data[0]);
- }
- else {
- set_bit(IVTV_F_S_DMA_PENDING, &s->s_flags);
- }
+ set_bit(ivtv_use_pio(s) ? IVTV_F_S_PIO_PENDING : IVTV_F_S_DMA_PENDING, &s->s_flags);
}
}
@@ -551,15 +613,6 @@
IVTV_DEBUG_IRQ("ENC START VBI CAP\n");
s = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
- if (ivtv_use_pio(s)) {
- if (stream_enc_dma_append(s, data))
- return;
- if (s->q_predma.bytesused)
- ivtv_queue_move(s, &s->q_predma, NULL, &s->q_dma, s->q_predma.bytesused);
- s->SG_length = 0;
- dma_post(s);
- return;
- }
/* If more than two VBI buffers are pending, then
clear the old ones and start with this new one.
This can happen during transition stages when MPEG capturing is
@@ -582,11 +635,11 @@
if (!stream_enc_dma_append(s, data) &&
!test_bit(IVTV_F_S_STREAMING, &s_mpg->s_flags)) {
set_bit(IVTV_F_I_ENC_VBI, &itv->i_flags);
- set_bit(IVTV_F_S_DMA_PENDING, &s->s_flags);
+ set_bit(ivtv_use_pio(s) ? IVTV_F_S_PIO_PENDING : IVTV_F_S_DMA_PENDING, &s->s_flags);
}
}
-static void ivtv_irq_dev_vbi_reinsert(struct ivtv *itv)
+static void ivtv_irq_dec_vbi_reinsert(struct ivtv *itv)
{
u32 data[CX2341X_MBOX_MAX_DATA];
struct ivtv_stream *s = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI];
@@ -594,7 +647,7 @@
IVTV_DEBUG_IRQ("DEC VBI REINSERT\n");
if (test_bit(IVTV_F_S_CLAIMED, &s->s_flags) &&
!stream_enc_dma_append(s, data)) {
- dma_post(s);
+ set_bit(IVTV_F_S_PIO_PENDING, &s->s_flags);
}
}
@@ -657,7 +710,6 @@
}
if (frame != (itv->lastVsyncFrame & 1)) {
struct ivtv_stream *s = ivtv_get_output_stream(itv);
- int work = 0;
itv->lastVsyncFrame += 1;
if (frame == 0) {
@@ -678,7 +730,7 @@
/* Send VBI to saa7127 */
if (frame) {
set_bit(IVTV_F_I_WORK_HANDLER_VBI, &itv->i_flags);
- work = 1;
+ set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags);
}
/* Check if we need to update the yuv registers */
@@ -691,11 +743,9 @@
itv->yuv_info.new_frame_info[last_dma_frame].update = 0;
itv->yuv_info.yuv_forced_update = 0;
set_bit(IVTV_F_I_WORK_HANDLER_YUV, &itv->i_flags);
- work = 1;
+ set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags);
}
}
- if (work)
- queue_work(itv->irq_work_queues, &itv->irq_work_queue);
}
}
@@ -755,6 +805,10 @@
ivtv_irq_enc_dma_complete(itv);
}
+ if (combo & IVTV_IRQ_ENC_PIO_COMPLETE) {
+ ivtv_irq_enc_pio_complete(itv);
+ }
+
if (combo & IVTV_IRQ_DMA_ERR) {
ivtv_irq_dma_err(itv);
}
@@ -768,7 +822,7 @@
}
if (combo & IVTV_IRQ_DEC_VBI_RE_INSERT) {
- ivtv_irq_dev_vbi_reinsert(itv);
+ ivtv_irq_dec_vbi_reinsert(itv);
}
if (combo & IVTV_IRQ_ENC_EOS) {
@@ -813,6 +867,22 @@
}
}
+ if ((combo & IVTV_IRQ_DMA) && !test_bit(IVTV_F_I_PIO, &itv->i_flags)) {
+ for (i = 0; i < IVTV_MAX_STREAMS; i++) {
+ int idx = (i + itv->irq_rr_idx++) % IVTV_MAX_STREAMS;
+ struct ivtv_stream *s = &itv->streams[idx];
+
+ if (!test_and_clear_bit(IVTV_F_S_PIO_PENDING, &s->s_flags))
+ continue;
+ if (s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type < IVTV_DEC_STREAM_TYPE_MPG)
+ ivtv_dma_enc_start(s);
+ break;
+ }
+ }
+
+ if (test_and_clear_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags))
+ queue_work(itv->irq_work_queues, &itv->irq_work_queue);
+
spin_unlock(&itv->dma_reg_lock);
/* If we've just handled a 'forced' vsync, it's safest to say it
diff --git a/drivers/media/video/ivtv/ivtv-queue.c b/drivers/media/video/ivtv/ivtv-queue.c
index ccfcef1..a04f938 100644
--- a/drivers/media/video/ivtv/ivtv-queue.c
+++ b/drivers/media/video/ivtv/ivtv-queue.c
@@ -195,14 +195,26 @@
s->dma != PCI_DMA_NONE ? "DMA " : "",
s->name, s->buffers, s->buf_size, s->buffers * s->buf_size / 1024);
- /* Allocate DMA SG Arrays */
- if (s->dma != PCI_DMA_NONE) {
- s->SGarray = (struct ivtv_SG_element *)kzalloc(SGsize, GFP_KERNEL);
- if (s->SGarray == NULL) {
- IVTV_ERR("Could not allocate SGarray for %s stream\n", s->name);
+ if (ivtv_might_use_pio(s)) {
+ s->PIOarray = (struct ivtv_SG_element *)kzalloc(SGsize, GFP_KERNEL);
+ if (s->PIOarray == NULL) {
+ IVTV_ERR("Could not allocate PIOarray for %s stream\n", s->name);
return -ENOMEM;
}
- s->SG_length = 0;
+ }
+
+ /* Allocate DMA SG Arrays */
+ s->SGarray = (struct ivtv_SG_element *)kzalloc(SGsize, GFP_KERNEL);
+ if (s->SGarray == NULL) {
+ IVTV_ERR("Could not allocate SGarray for %s stream\n", s->name);
+ if (ivtv_might_use_pio(s)) {
+ kfree(s->PIOarray);
+ s->PIOarray = NULL;
+ }
+ return -ENOMEM;
+ }
+ s->SG_length = 0;
+ if (ivtv_might_use_dma(s)) {
s->SG_handle = pci_map_single(itv->dev, s->SGarray, SGsize, s->dma);
ivtv_stream_sync_for_cpu(s);
}
@@ -219,7 +231,7 @@
break;
}
INIT_LIST_HEAD(&buf->list);
- if (s->dma != PCI_DMA_NONE) {
+ if (ivtv_might_use_dma(s)) {
buf->dma_handle = pci_map_single(s->itv->dev,
buf->buf, s->buf_size + 256, s->dma);
ivtv_buf_sync_for_cpu(s, buf);
@@ -242,7 +254,7 @@
/* empty q_free */
while ((buf = ivtv_dequeue(s, &s->q_free))) {
- if (s->dma != PCI_DMA_NONE)
+ if (ivtv_might_use_dma(s))
pci_unmap_single(s->itv->dev, buf->dma_handle,
s->buf_size + 256, s->dma);
kfree(buf->buf);
@@ -256,6 +268,9 @@
sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE);
s->SG_handle = IVTV_DMA_UNMAPPED;
}
+ kfree(s->SGarray);
+ kfree(s->PIOarray);
+ s->PIOarray = NULL;
s->SGarray = NULL;
s->SG_length = 0;
}
diff --git a/drivers/media/video/ivtv/ivtv-queue.h b/drivers/media/video/ivtv/ivtv-queue.h
index 903edd4..2ed8d54 100644
--- a/drivers/media/video/ivtv/ivtv-queue.h
+++ b/drivers/media/video/ivtv/ivtv-queue.h
@@ -20,18 +20,43 @@
*/
#define IVTV_DMA_UNMAPPED ((u32) -1)
+#define SLICED_VBI_PIO 1
/* ivtv_buffer utility functions */
+
+static inline int ivtv_might_use_pio(struct ivtv_stream *s)
+{
+ return s->dma == PCI_DMA_NONE || (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI);
+}
+
+static inline int ivtv_use_pio(struct ivtv_stream *s)
+{
+ struct ivtv *itv = s->itv;
+
+ return s->dma == PCI_DMA_NONE ||
+ (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set);
+}
+
+static inline int ivtv_might_use_dma(struct ivtv_stream *s)
+{
+ return s->dma != PCI_DMA_NONE;
+}
+
+static inline int ivtv_use_dma(struct ivtv_stream *s)
+{
+ return !ivtv_use_pio(s);
+}
+
static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf)
{
- if (s->dma != PCI_DMA_NONE)
+ if (ivtv_use_dma(s))
pci_dma_sync_single_for_cpu(s->itv->dev, buf->dma_handle,
s->buf_size + 256, s->dma);
}
static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf)
{
- if (s->dma != PCI_DMA_NONE)
+ if (ivtv_use_dma(s))
pci_dma_sync_single_for_device(s->itv->dev, buf->dma_handle,
s->buf_size + 256, s->dma);
}
@@ -53,12 +78,14 @@
static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s)
{
- pci_dma_sync_single_for_cpu(s->itv->dev, s->SG_handle,
- sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE);
+ if (ivtv_use_dma(s))
+ pci_dma_sync_single_for_cpu(s->itv->dev, s->SG_handle,
+ sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE);
}
static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s)
{
- pci_dma_sync_single_for_device(s->itv->dev, s->SG_handle,
- sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE);
+ if (ivtv_use_dma(s))
+ pci_dma_sync_single_for_device(s->itv->dev, s->SG_handle,
+ sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE);
}
diff --git a/drivers/media/video/ivtv/ivtv-vbi.c b/drivers/media/video/ivtv/ivtv-vbi.c
index 5efa5a8..3ba46e0 100644
--- a/drivers/media/video/ivtv/ivtv-vbi.c
+++ b/drivers/media/video/ivtv/ivtv-vbi.c
@@ -450,7 +450,7 @@
}
-void vbi_work_handler(struct ivtv *itv)
+void ivtv_vbi_work_handler(struct ivtv *itv)
{
struct v4l2_sliced_vbi_data data;
diff --git a/drivers/media/video/ivtv/ivtv-vbi.h b/drivers/media/video/ivtv/ivtv-vbi.h
index cdaea69..ec211b4 100644
--- a/drivers/media/video/ivtv/ivtv-vbi.h
+++ b/drivers/media/video/ivtv/ivtv-vbi.h
@@ -23,4 +23,4 @@
int ivtv_used_line(struct ivtv *itv, int line, int field);
void ivtv_disable_vbi(struct ivtv *itv);
void ivtv_set_vbi(unsigned long arg);
-void vbi_work_handler(struct ivtv *itv);
+void ivtv_vbi_work_handler(struct ivtv *itv);