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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-12-11 16:37:06 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-12-11 16:37:06 +0000 |
| commit | 5369bea7d7db1d95f63907f3470e23d32930be98 (patch) | |
| tree | b4d9fdf93c10a3f630f26ccad66437e2209ce102 /drivers/scsi/arm | |
| parent | f6718653361e8f8a6aac9946822aa2090edf4f37 (diff) | |
| download | kernel_samsung_tuna-5369bea7d7db1d95f63907f3470e23d32930be98.zip kernel_samsung_tuna-5369bea7d7db1d95f63907f3470e23d32930be98.tar.gz kernel_samsung_tuna-5369bea7d7db1d95f63907f3470e23d32930be98.tar.bz2 | |
[ARM] dma: Use sensible DMA parameters for Acorn drivers
The hardware supports transfers up to a page boundary per buffer.
Currently, we work around that in the DMA code by splitting each
buffer up as we run through the scatterlist. Avoid this by telling
the block layers about the hardware restriction.
Eventually, this will allow us to phase out the splitting code,
but not until the old IDE layer allows us to control the value it
gives to blk_queue_segment_boundary().
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/scsi/arm')
| -rw-r--r-- | drivers/scsi/arm/cumana_2.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/arm/eesox.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/arm/powertec.c | 3 |
3 files changed, 6 insertions, 3 deletions
diff --git a/drivers/scsi/arm/cumana_2.c b/drivers/scsi/arm/cumana_2.c index 68a6412..8ee01b9 100644 --- a/drivers/scsi/arm/cumana_2.c +++ b/drivers/scsi/arm/cumana_2.c @@ -390,7 +390,8 @@ static struct scsi_host_template cumanascsi2_template = { .eh_abort_handler = fas216_eh_abort, .can_queue = 1, .this_id = 7, - .sg_tablesize = SG_ALL, + .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, + .dma_boundary = IOMD_DMA_BOUNDARY, .cmd_per_lun = 1, .use_clustering = DISABLE_CLUSTERING, .proc_name = "cumanascsi2", diff --git a/drivers/scsi/arm/eesox.c b/drivers/scsi/arm/eesox.c index bb2477b..d843513 100644 --- a/drivers/scsi/arm/eesox.c +++ b/drivers/scsi/arm/eesox.c @@ -508,7 +508,8 @@ static struct scsi_host_template eesox_template = { .eh_abort_handler = fas216_eh_abort, .can_queue = 1, .this_id = 7, - .sg_tablesize = SG_ALL, + .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, + .dma_boundary = IOMD_DMA_BOUNDARY, .cmd_per_lun = 1, .use_clustering = DISABLE_CLUSTERING, .proc_name = "eesox", diff --git a/drivers/scsi/arm/powertec.c b/drivers/scsi/arm/powertec.c index d9a546d..e2297b4 100644 --- a/drivers/scsi/arm/powertec.c +++ b/drivers/scsi/arm/powertec.c @@ -302,7 +302,8 @@ static struct scsi_host_template powertecscsi_template = { .can_queue = 8, .this_id = 7, - .sg_tablesize = SG_ALL, + .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, + .dma_boundary = IOMD_DMA_BOUNDARY, .cmd_per_lun = 2, .use_clustering = ENABLE_CLUSTERING, .proc_name = "powertec", |