user/sven/linux.git/include/sound/memalloc.h, branch v3.4.106

ALSA: memalloc.h - fix wrong truncation of dma_addr_t

2013-12-20T15:34:19Z

commit 932e9dec380c67ec15ac3eb073bb55797d8b4801 upstream. When running a 32bit kernel the hda_intel driver is still reporting a 64bit dma_mask if the HW supports it. From sound/pci/hda/hda_intel.c: /* allow 64bit DMA address if supported by H/W */ if ((gcap & ICH6_GCAP_64OK) && !pci_set_dma_mask(pci, DMA_BIT_MASK(64))) pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64)); else { pci_set_dma_mask(pci, DMA_BIT_MASK(32)); pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)); } which means when there is a call to dma_alloc_coherent from snd_malloc_dev_pages a machine address bigger than 32bit can be returned. This can be true in particular if running the 32bit kernel as a pv dom0 under the Xen Hypervisor or PAE on bare metal. The problem is that when calling setup_bdle to program the BLE the dma_addr_t returned from the dma_alloc_coherent is wrongly truncated from snd_sgbuf_get_addr if running a 32bit kernel: static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab, size_t offset) { struct snd_sg_buf *sgbuf = dmab->private_data; dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr; addr &= PAGE_MASK; return addr + offset % PAGE_SIZE; } where PAGE_MASK in a 32bit kernel is zeroing the upper 32bit af addr. Without this patch the HW will fetch the 32bit truncated address, which is not the one obtained from dma_alloc_coherent and will result to a non working audio but can corrupt host memory at a random location. The current patch apply to v3.13-rc3-74-g6c843f5 Signed-off-by: Stefano Panella Reviewed-by: Frediano Ziglio Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: Fix SG-buffer DMA with non-coherent architectures

2009-07-08T12:20:20Z

Using SG-buffers with dma_alloc_coherent() is often very inefficient on non-coherent architectures because a tracking record could be allocated in addition for each dma_alloc_coherent() call. Instead, simply disable SG-buffers but just allocate normal continuous buffers on non-supported (currently all but x86) architectures. Signed-off-by: Takashi Iwai

Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

2008-10-11T19:39:35Z

Conflicts: sound/core/memalloc.c

alsa: Remove special SBUS dma support code.

2008-08-29T09:14:58Z

No longer used. Signed-off-by: David S. Miller

ALSA: Allocate larger pages in sgbuf

2008-08-25T07:57:38Z

Most hardwares have limited buffer-descriptor table length. This also restricts the max buffer size of the sound driver. For example, snd-hda-intel has 1MB buffer size limit, and this is because it can have at most 256 BDL entries. For supporting larger buffers, we need to allocate larger pages even for sg-buffers. This patch changes the sgbuf allocation code to try to allocate larger pages first. At each head of the allocated pages, the number of allocated pages is stored in the lowest bits of the corresponding entry of the table addr field. This change isn't visible as long as the driver uses snd_sgbuf_get_addr() helper. Also, the patch adds a new function, snd_pcm_sgbuf_get_chunk_size(). This returns the size of the chunk on continuous pages starting at the given position offset. If the chunk reaches to a non-continuous page, it returns the size to the boundary. Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela

ALSA: Clean up SG-buffer helper functions and macros

2008-08-25T07:57:18Z

Clean up SG-buffer helper functions and macros. Helpers take substream as arguments now. Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela

[ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz

2007-10-16T14:51:18Z

Signed-off-by: Jaroslav Kysela

[PATCH] gfp_t: sound

2005-10-28T15:16:50Z

Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

ALSA CVS update

2004-08-02T13:21:26Z

Memalloc module,PCM Midlevel,CS46xx driver,EMU10K1/EMU10K2 driver ALSA Core,YMFPCI driver,Sound Scape driver,ATIIXP driver ATIIXP-modem driver,BT87x driver,ENS1370/1+ driver,ES1968 driver Intel8x0 driver,Intel8x0-modem driver,VIA82xx driver,KORG1212 driver MIXART driver,RME HDSP driver,RME9652 driver,Trident driver Clean up DMA buffer allocation routines. - snd_dma_alloc_pages*() take the device type and device pointer directly as arguments. snd_dma_free_pages() takes only dma_buffer instance. - snd_dma_device struct is removed in each driver's instance (no longer needed due to the change above). - snd_malloc_pages_fallback() is removed since it's no longer used. - The buffer reservation / preallocation in snd-page-alloc module is performed only when the buffer id is given. Normal PCM buffers won't be reserved any more (unless the driver specifies). The module keeps the linked list of free-reserved buffers, instead of the whole buffers Reservation is done via snd_dma_reserve_buf(), and retrieved via snd_dma_get_reserved_buf()). - Other misc clean-ups/fixes. Signed-off-by: Takashi Iwai

ALSA CVS update - Takashi Iwai

2004-03-07T12:37:02Z

Memalloc module,PCM Midlevel,ALSA Core,CMI8330 driver,ES18xx driver Sound Scape driver,AD1816A driver,AD1848 driver,CS4231 driver ES1688 driver,GUS Library,Opti9xx drivers,SB16/AWE driver,SB8 driver ALS4000 driver,AZT3328 driver,BT87x driver,CMIPCI driver,CS4281 driver ENS1370/1+ driver,ES1938 driver,ES1968 driver,FM801 driver Intel8x0 driver,Maestro3 driver,RME32 driver,RME96 driver SonicVibes driver,VIA82xx driver,ALI5451 driver,CS46xx driver EMU10K1/EMU10K2 driver,ICE1712 driver,ICE1724 driver,KORG1212 driver MIXART driver,RME HDSP driver,RME9652 driver,Trident driver YMFPCI driver,Sound Core PDAudioCF driver,USB generic driver - clean up the DMA code again. now only struct device pointer is handled for every BUS type. the pointer must be given via the corresponding macro snd_dma_xxx_data(). - added the hack for dma_alloc_coherent() to accept dev = NULL for ISA buffers. - added the missing include files.