diff options
| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2009-10-13 20:22:35 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-02-27 12:52:55 +0100 |
| commit | 963accbc82a0912b39de39d59e2fd6741db3aa4b (patch) | |
| tree | 4ea340b0261ab19f3f0776f47e4fab8708934b5b /sound/oss | |
| parent | ea071cc705e8bfba0c8bf84be8d4f9f4e9da6962 (diff) | |
| download | lwn-963accbc82a0912b39de39d59e2fd6741db3aa4b.tar.gz lwn-963accbc82a0912b39de39d59e2fd6741db3aa4b.zip | |
MIPS: Alchemy: change dbdma to accept physical memory addresses
DMA can only be done from physical addresses; move the "virt_to_phys"
source/destination buffer address translation from the dbdma queueing
functions (since the hardware can only DMA to/from physical addresses)
to their respective users.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'sound/oss')
| -rw-r--r-- | sound/oss/au1550_ac97.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/sound/oss/au1550_ac97.c b/sound/oss/au1550_ac97.c index b9ff0b798032..c1070e33b32f 100644 --- a/sound/oss/au1550_ac97.c +++ b/sound/oss/au1550_ac97.c @@ -614,7 +614,7 @@ start_adc(struct au1550_state *s) /* Put two buffers on the ring to get things started. */ for (i=0; i<2; i++) { - au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, + au1xxx_dbdma_put_dest(db->dmanr, virt_to_phys(db->nextIn), db->dma_fragsize, DDMA_FLAGS_IE); db->nextIn += db->dma_fragsize; @@ -733,8 +733,9 @@ static void dac_dma_interrupt(int irq, void *dev_id) db->dma_qcount--; if (db->count >= db->fragsize) { - if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut, - db->fragsize, DDMA_FLAGS_IE) == 0) { + if (au1xxx_dbdma_put_source(db->dmanr, + virt_to_phys(db->nextOut), db->fragsize, + DDMA_FLAGS_IE) == 0) { err("qcount < 2 and no ring room!"); } db->nextOut += db->fragsize; @@ -778,7 +779,7 @@ static void adc_dma_interrupt(int irq, void *dev_id) /* Put a new empty buffer on the destination DMA. */ - au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, + au1xxx_dbdma_put_dest(dp->dmanr, virt_to_phys(dp->nextIn), dp->dma_fragsize, DDMA_FLAGS_IE); dp->nextIn += dp->dma_fragsize; @@ -1180,7 +1181,8 @@ au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos) */ while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) { if (au1xxx_dbdma_put_source(db->dmanr, - db->nextOut, db->fragsize, DDMA_FLAGS_IE) == 0) { + virt_to_phys(db->nextOut), db->fragsize, + DDMA_FLAGS_IE) == 0) { err("qcount < 2 and no ring room!"); } db->nextOut += db->fragsize; |