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Diffstat (limited to 'sound/oss/dmabuf.c')
-rw-r--r--sound/oss/dmabuf.c76
1 files changed, 22 insertions, 54 deletions
diff --git a/sound/oss/dmabuf.c b/sound/oss/dmabuf.c
index baf4244a54f..e3f29132d3a 100644
--- a/sound/oss/dmabuf.c
+++ b/sound/oss/dmabuf.c
@@ -1,5 +1,5 @@
/*
- * sound/dmabuf.c
+ * sound/oss/dmabuf.c
*
* The DMA buffer manager for digitized voice applications
*/
@@ -25,7 +25,10 @@
#define BE_CONSERVATIVE
#define SAMPLE_ROUNDUP 0
+#include <linux/mm.h>
+#include <linux/gfp.h>
#include "sound_config.h"
+#include "sleep.h"
#define DMAP_FREE_ON_CLOSE 0
#define DMAP_KEEP_ON_CLOSE 1
@@ -112,7 +115,7 @@ static int sound_alloc_dmap(struct dma_buffparms *dmap)
}
}
dmap->raw_buf = start_addr;
- dmap->raw_buf_phys = virt_to_bus(start_addr);
+ dmap->raw_buf_phys = dma_map_single(NULL, start_addr, dmap->buffsize, DMA_BIDIRECTIONAL);
for (page = virt_to_page(start_addr); page <= virt_to_page(end_addr); page++)
SetPageReserved(page);
@@ -137,6 +140,7 @@ static void sound_free_dmap(struct dma_buffparms *dmap)
for (page = virt_to_page(start_addr); page <= virt_to_page(end_addr); page++)
ClearPageReserved(page);
+ dma_unmap_single(NULL, dmap->raw_buf_phys, dmap->buffsize, DMA_BIDIRECTIONAL);
free_pages((unsigned long) dmap->raw_buf, sz);
dmap->raw_buf = NULL;
}
@@ -348,8 +352,7 @@ static void dma_reset_output(int dev)
if (!signal_pending(current) && adev->dmap_out->qlen &&
adev->dmap_out->underrun_count == 0){
spin_unlock_irqrestore(&dmap->lock,flags);
- interruptible_sleep_on_timeout(&adev->out_sleeper,
- dmabuf_timeout(dmap));
+ oss_broken_sleep_on(&adev->out_sleeper, dmabuf_timeout(dmap));
spin_lock_irqsave(&dmap->lock,flags);
}
adev->dmap_out->flags &= ~(DMA_SYNCING | DMA_ACTIVE);
@@ -438,12 +441,12 @@ int DMAbuf_sync(int dev)
DMAbuf_launch_output(dev, dmap);
adev->dmap_out->flags |= DMA_SYNCING;
adev->dmap_out->underrun_count = 0;
- while (!signal_pending(current) && n++ <= adev->dmap_out->nbufs &&
+ while (!signal_pending(current) && n++ < adev->dmap_out->nbufs &&
adev->dmap_out->qlen && adev->dmap_out->underrun_count == 0) {
long t = dmabuf_timeout(dmap);
spin_unlock_irqrestore(&dmap->lock,flags);
/* FIXME: not safe may miss events */
- t = interruptible_sleep_on_timeout(&adev->out_sleeper, t);
+ t = oss_broken_sleep_on(&adev->out_sleeper, t);
spin_lock_irqsave(&dmap->lock,flags);
if (!t) {
adev->dmap_out->flags &= ~DMA_SYNCING;
@@ -463,7 +466,7 @@ int DMAbuf_sync(int dev)
while (!signal_pending(current) &&
adev->d->local_qlen(dev)){
spin_unlock_irqrestore(&dmap->lock,flags);
- interruptible_sleep_on_timeout(&adev->out_sleeper,
+ oss_broken_sleep_on(&adev->out_sleeper,
dmabuf_timeout(dmap));
spin_lock_irqsave(&dmap->lock,flags);
}
@@ -547,14 +550,13 @@ int DMAbuf_activate_recording(int dev, struct dma_buffparms *dmap)
}
return 0;
}
-/* aquires lock */
+/* acquires lock */
int DMAbuf_getrdbuffer(int dev, char **buf, int *len, int dontblock)
{
struct audio_operations *adev = audio_devs[dev];
unsigned long flags;
int err = 0, n = 0;
struct dma_buffparms *dmap = adev->dmap_in;
- int go;
if (!(adev->open_mode & OPEN_READ))
return -EIO;
@@ -581,12 +583,11 @@ int DMAbuf_getrdbuffer(int dev, char **buf, int *len, int dontblock)
spin_unlock_irqrestore(&dmap->lock,flags);
return -EAGAIN;
}
- if ((go = adev->go))
+ if (adev->go)
timeout = dmabuf_timeout(dmap);
spin_unlock_irqrestore(&dmap->lock,flags);
- timeout = interruptible_sleep_on_timeout(&adev->in_sleeper,
- timeout);
+ timeout = oss_broken_sleep_on(&adev->in_sleeper, timeout);
if (!timeout) {
/* FIXME: include device name */
err = -EIO;
@@ -766,8 +767,7 @@ static int output_sleep(int dev, int dontblock)
timeout_value = dmabuf_timeout(dmap);
else
timeout_value = MAX_SCHEDULE_TIMEOUT;
- timeout_value = interruptible_sleep_on_timeout(&adev->out_sleeper,
- timeout_value);
+ timeout_value = oss_broken_sleep_on(&adev->out_sleeper, timeout_value);
if (timeout != MAX_SCHEDULE_TIMEOUT && !timeout_value) {
printk(KERN_WARNING "Sound: DMA (output) timed out - IRQ/DRQ config error?\n");
dma_reset_output(dev);
@@ -794,9 +794,9 @@ static int find_output_space(int dev, char **buf, int *size)
#ifdef BE_CONSERVATIVE
active_offs = dmap->byte_counter + dmap->qhead * dmap->fragment_size;
#else
- active_offs = DMAbuf_get_buffer_pointer(dev, dmap, DMODE_OUTPUT);
+ active_offs = max(DMAbuf_get_buffer_pointer(dev, dmap, DMODE_OUTPUT), 0);
/* Check for pointer wrapping situation */
- if (active_offs < 0 || active_offs >= dmap->bytes_in_use)
+ if (active_offs >= dmap->bytes_in_use)
active_offs = 0;
active_offs += dmap->byte_counter;
#endif
@@ -821,7 +821,7 @@ static int find_output_space(int dev, char **buf, int *size)
*size = len & ~SAMPLE_ROUNDUP;
return (*size > 0);
}
-/* aquires lock */
+/* acquires lock */
int DMAbuf_getwrbuffer(int dev, char **buf, int *size, int dontblock)
{
struct audio_operations *adev = audio_devs[dev];
@@ -855,7 +855,7 @@ int DMAbuf_getwrbuffer(int dev, char **buf, int *size, int dontblock)
spin_unlock_irqrestore(&dmap->lock,flags);
return 0;
}
-/* has to aquire dmap->lock */
+/* has to acquire dmap->lock */
int DMAbuf_move_wrpointer(int dev, int l)
{
struct audio_operations *adev = audio_devs[dev];
@@ -926,6 +926,7 @@ int DMAbuf_start_dma(int dev, unsigned long physaddr, int count, int dma_mode)
sound_start_dma(dmap, physaddr, count, dma_mode);
return count;
}
+EXPORT_SYMBOL(DMAbuf_start_dma);
static int local_start_dma(struct audio_operations *adev, unsigned long physaddr, int count, int dma_mode)
{
@@ -1055,6 +1056,8 @@ void DMAbuf_outputintr(int dev, int notify_only)
do_outputintr(dev, notify_only);
spin_unlock_irqrestore(&dmap->lock,flags);
}
+EXPORT_SYMBOL(DMAbuf_outputintr);
+
/* called with dmap->lock held in irq context */
static void do_inputintr(int dev)
{
@@ -1154,36 +1157,7 @@ void DMAbuf_inputintr(int dev)
do_inputintr(dev);
spin_unlock_irqrestore(&dmap->lock,flags);
}
-
-int DMAbuf_open_dma(int dev)
-{
- /*
- * NOTE! This routine opens only the primary DMA channel (output).
- */
- struct audio_operations *adev = audio_devs[dev];
- int err;
-
- if ((err = open_dmap(adev, OPEN_READWRITE, adev->dmap_out)) < 0)
- return -EBUSY;
- dma_init_buffers(adev->dmap_out);
- adev->dmap_out->flags |= DMA_ALLOC_DONE;
- adev->dmap_out->fragment_size = adev->dmap_out->buffsize;
-
- if (adev->dmap_out->dma >= 0) {
- unsigned long flags;
-
- flags=claim_dma_lock();
- clear_dma_ff(adev->dmap_out->dma);
- disable_dma(adev->dmap_out->dma);
- release_dma_lock(flags);
- }
- return 0;
-}
-
-void DMAbuf_close_dma(int dev)
-{
- close_dmap(audio_devs[dev], audio_devs[dev]->dmap_out);
-}
+EXPORT_SYMBOL(DMAbuf_inputintr);
void DMAbuf_init(int dev, int dma1, int dma2)
{
@@ -1192,12 +1166,6 @@ void DMAbuf_init(int dev, int dma1, int dma2)
* NOTE! This routine could be called several times.
*/
- /* drag in audio_syms.o */
- {
- extern char audio_syms_symbol;
- audio_syms_symbol = 0;
- }
-
if (adev && adev->dmap_out == NULL) {
if (adev->d == NULL)
panic("OSS: audio_devs[%d]->d == NULL\n", dev);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 23:37:06 +0000