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authorArnd Bergmann <abergman@de.ibm.com>2006-03-23 00:00:11 +0100
committerPaul Mackerras <paulus@samba.org>2006-03-27 14:48:26 +1100
commita33a7d7309d79656bc19a0e96fc4547a1633283e (patch)
treef3de6d139af1f1cbdf6d37800c9e13c07e9bc7f6 /include/asm-powerpc
parent2dd14934c9138c562d93c501e88c6d6f061eb8ba (diff)
[PATCH] spufs: implement mfc access for PPE-side DMA
This patch adds a new file called 'mfc' to each spufs directory. The file accepts DMA commands that are a subset of what would be legal DMA commands for problem state register access. Upon reading the file, a bitmask is returned with the completed tag groups set. The file is meant to be used from an abstraction in libspe that is added by a different patch. From the kernel perspective, this means a process can now offload a memory copy from or into an SPE local store without having to run code on the SPE itself. The transfer will only be performed while the SPE is owned by one thread that is waiting in the spu_run system call and the data will be transferred into that thread's address space, independent of which thread started the transfer. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/spu.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index b5c90d6fdce..8564b823406 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -137,6 +137,7 @@ struct spu {
void (* wbox_callback)(struct spu *spu);
void (* ibox_callback)(struct spu *spu);
void (* stop_callback)(struct spu *spu);
+ void (* mfc_callback)(struct spu *spu);
char irq_c0[8];
char irq_c1[8];