Aren/haiku
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

usb_audio: Map the buffer area as B_READ_AREA/B_WRITE_AREA.

Browse Source 
The calling userland process needs to be able to access it.
This commit is contained in:
Augustin Cavalier 2019-07-13 23:43:14 -04:00
parent 4a6a2fbfda
commit b281541f9a
1 changed files with 29 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/add-ons/kernel/drivers/audio/usb/Stream.cpp
View File

@ -165,31 +165,37 @@ Stream::_SetupBuffers()
/ (fDevice->fUSBVersion < 0x0200 ? 1000 : 8000);
TRACE(INF, "packetSize:%ld\n", fPacketSize);
if (fArea == -1) {
fAreaSize = (sizeof(usb_iso_packet_descriptor) + fPacketSize)
* sampleSize * 1024 / fPacketSize;
TRACE(INF, "estimate fAreaSize:%d\n", fAreaSize);
// round up to B_PAGE_SIZE and create area
fAreaSize = (fAreaSize + (B_PAGE_SIZE - 1)) &~ (B_PAGE_SIZE - 1);
TRACE(INF, "rounded up fAreaSize:%d\n", fAreaSize);
fArea = create_area( (fIsInput) ? DRIVER_NAME "_record_area"
: DRIVER_NAME "_playback_area", (void**)&fDescriptors,
B_ANY_KERNEL_ADDRESS, fAreaSize, B_CONTIGUOUS,
B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA);
if (fArea < 0) {
TRACE(ERR, "Error of creating %#x - "
"bytes size buffer area:%#010x\n", fAreaSize, fArea);
fStatus = fArea;
return fStatus;
}
TRACE(INF, "Created area id:%d at addr:%#010x size:%#010lx\n",
fArea, fDescriptors, fAreaSize);
if (fPacketSize == 0) {
TRACE(ERR, "computed packet size is 0!");
return B_BAD_VALUE;
}
if (fArea != -1)
delete_area(fArea);
fAreaSize = (sizeof(usb_iso_packet_descriptor) + fPacketSize)
* sampleSize * 1024 / fPacketSize;
TRACE(INF, "estimate fAreaSize:%d\n", fAreaSize);
// round up to B_PAGE_SIZE and create area
fAreaSize = (fAreaSize + (B_PAGE_SIZE - 1)) &~ (B_PAGE_SIZE - 1);
TRACE(INF, "rounded up fAreaSize:%d\n", fAreaSize);
fArea = create_area( (fIsInput) ? DRIVER_NAME "_record_area"
: DRIVER_NAME "_playback_area", (void**)&fDescriptors,
B_ANY_KERNEL_ADDRESS, fAreaSize, B_CONTIGUOUS,
B_READ_AREA | B_WRITE_AREA);
if (fArea < 0) {
TRACE(ERR, "Error of creating %#x - "
"bytes size buffer area:%#010x\n", fAreaSize, fArea);
fStatus = fArea;
return fStatus;
}
TRACE(INF, "Created area id:%d at addr:%#010x size:%#010lx\n",
fArea, fDescriptors, fAreaSize);
// descriptors count
fDescriptorsCount = fAreaSize
/ (sizeof(usb_iso_packet_descriptor) + fPacketSize);