- 11 5月, 2011 1 次提交
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由 Stefan Richter 提交于
We do not need slab allocations anymore in order to satisfy streaming DMA mapping constraints, thanks to commit da28947e "firewire: ohci: avoid separate DMA mapping for small AT payloads". (Besides, the slab-allocated buffers that firewire-core, firewire-sbp2, and firedtv used to provide for 8-byte write and lock requests were still not fully portable since they crossed cacheline boundaries or shared a cacheline with unrelated CPU-accessed data. snd-firewire-lib got this aspect right by using an extra kmalloc/ kfree just for the 8-byte transaction buffer.) This change replaces kmalloc'ed lock transaction scratch buffers in firewire-core, firedtv, and snd-firewire-lib by local stack allocations. Perhaps the most notable result of the change is simpler locking because there is no need to serialize usages of preallocated per-device buffers anymore. Also, allocations and deallocations are simpler. Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: NClemens Ladisch <clemens@ladisch.de>
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- 15 3月, 2011 2 次提交
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由 Clemens Ladisch 提交于
For correct cache coherency on some architectures, DMA buffers must be allocated in a different cache line than data that is concurrently used by the CPU. Signed-off-by: NClemens Ladisch <clemens@ladisch.de> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Clemens Ladisch 提交于
Add a driver for two playback-only FireWire devices based on the OXFW970 chip. v2: better AMDTP API abstraction; fix fw_unit leak; small fixes v3: cache the iPCR value v4: FireWave constraints; fix fw_device reference counting; fix PCR caching; small changes and fixes v5: volume/mute support; fix crashing due to pcm stop races v6: fix build; one-channel volume for LaCie v7: use signed values to make volume (range checks) work; fix function block IDs for volume/mute; always use channel 0 for LaCie volume Signed-off-by: NClemens Ladisch <clemens@ladisch.de> Acked-by: NStefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: NJay Fenlason <fenlason@redhat.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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