USB virt 2.6 split driver---xenidc buffer references
PATCH 3/17 USB virt 2.6 split driver---xenidc buffer references
This patch implements the generic code to support local and remote buffer references for the xenidc transport which is used by the USB driver.
Local buffer references are used to describe local memory and are converted into remote buffer references for communication with other domains. The other domains use remote buffer references to map the buffers into their local address space for bulk data transfer.
Grant references provide a mechanism to share memory on a per-page basis and couple the client to a specific memory sharing mechanism. Remote buffer references provide a memory sharing mechanism on a more convenient whole-buffer basis and are independent of the underlying implementation.
linux-2.6-xen-sparse/drivers/xen/xenidc/Makefile +2 -0
@@ -4,3 +4,5 @@ xenidc-objs += xenidc_callback.o xenidc-objs += xenidc_work.o xenidc-objs += xenidc_buffer_resource_provider.o +xenidc-objs += xenidc_local_buffer_reference.o +xenidc-objs += xenidc_remote_buffer_reference.o
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +627 -0
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linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_remote_buffer_reference.c new file +191 -0
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linux-2.6-xen-sparse/include/asm-xen/xenidc_address.h new file +61 -0
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linux-2.6-xen-sparse/include/asm-xen/xenidc_local_buffer_reference.h new file +379 -0
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linux-2.6-xen-sparse/include/asm-xen/xenidc_remote_buffer_reference.h new file +164 -0
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linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 32
Quoted 5 lines · harry
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +5
-0+#ifdef MIN +#undef MIN +#endif + +#define MIN (X ,Y ) ( ( (X) < (Y) ) ? (X) : (Y) )
Linux has a much better definition.
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 87
Quoted 1 line
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +1
-0+memset (buffer,0 ,64 );
s/64/sizeof(buffer)/? (there are arguments either way)
Quoted 10 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +10
-0+xenidc_buffer_type xenidc_local_buffer_reference_register_buffer_concrete_class + (xenidc_buffer_concrete_class * class, void (*copy_in_or_out) + (xenidc_buffer_concrete_class * class, + xenidc_local_buffer_reference * lbr, + void *buffer, xenidc_buffer_byte_count byte_count, int out), void (*zero) + (xenidc_buffer_concrete_class * class, + xenidc_local_buffer_reference * lbr), int (*calculate_rbr_resources) + (xenidc_buffer_concrete_class * class, + xenidc_local_buffer_reference * lbr, + xenidc_address * address,
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 122
Quoted 10 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +10
-0+ xenidc_buffer_resource_list * list), + xenidc_buffer_concrete_class ** (*create_rbr) + (xenidc_buffer_concrete_class * class, +xenidc_local_buffer_reference * lbr, +xenidc_address * address, +xenidc_buffer_resource_provider * provider, +xenidc_remote_buffer_reference * rbr, + int access_flags), void (*revoke_rbr) + (xenidc_buffer_concrete_class ** context,xenidc_callback * callback) + ) {
I guess this is one case where typedefs would improve the code ;-)
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 131
Quoted 3 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +3
-0+if (zero ==NULL ) { + zero = xenidc_local_buffer_reference_default_zero; + }
no braces please
Cheers,
Muli
Signature · 2 lines
Muli Ben-Yehuda http://www.mulix.org | http://mulix.livejournal.com/
Quoted 9 lines · Muli Ben-Yehuda
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 32
Quoted 5 lines · harry
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +5
-0+#ifdef MIN +#undef MIN +#endif + +#define MIN (X ,Y ) ( ( (X) < (Y) ) ? (X) : (Y) )Linux has a much better definition.
So it does. Didn't manage to find it last time.
Quoted 26 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 87
Quoted 2 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +1
-0+memset (buffer,0 ,64 );s/64/sizeof(buffer)/? (there are arguments either way)
Quoted 10 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +10
-0+xenidc_buffer_type xenidc_local_buffer_reference_register_buffer_concrete_class + (xenidc_buffer_concrete_class * class, void (*copy_in_or_out) + (xenidc_buffer_concrete_class * class, + xenidc_local_buffer_reference * lbr, + void *buffer, xenidc_buffer_byte_count byte_count, int out), void (*zero) + (xenidc_buffer_concrete_class * class, + xenidc_local_buffer_reference * lbr), int (*calculate_rbr_resources) + (xenidc_buffer_concrete_class * class, + xenidc_local_buffer_reference * lbr, + xenidc_address * address,linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 122
Quoted 10 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +10
-0+ xenidc_buffer_resource_list * list), + xenidc_buffer_concrete_class ** (*create_rbr) + (xenidc_buffer_concrete_class * class, +xenidc_local_buffer_reference * lbr, +xenidc_address * address, +xenidc_buffer_resource_provider * provider, +xenidc_remote_buffer_reference * rbr, + int access_flags), void (*revoke_rbr) + (xenidc_buffer_concrete_class ** context,xenidc_callback * callback) + ) {
Quoted 1 line
I guess this is one case where typedefs would improve the code ;-)
This looked much neater before Lindent got hold of it.
Quoted 6 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c line 131
Quoted 4 lines
linux-2.6-xen-sparse/drivers/xen/xenidc/xenidc_local_buffer_reference.c new file +3
-0+if (zero ==NULL ) { + zero = xenidc_local_buffer_reference_default_zero; + }no braces please
OK
Quoted 3 lines
Cheers,
Muli
Signature · 1 line
Harry Butterworth <[email protected]>