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authorArnd Bergmann <abergman@de.ibm.com>2006-03-22 18:00:11 -0500
committerPaul Mackerras <paulus@samba.org>2006-03-26 22:48:26 -0500
commita33a7d7309d79656bc19a0e96fc4547a1633283e (patch)
treef3de6d139af1f1cbdf6d37800c9e13c07e9bc7f6 /include/asm-powerpc/spu.h
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/spu.h')
-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 b5c90d6fdceb..8564b8234069 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -137,6 +137,7 @@ struct spu {
137 void (* wbox_callback)(struct spu *spu); 137 void (* wbox_callback)(struct spu *spu);
138 void (* ibox_callback)(struct spu *spu); 138 void (* ibox_callback)(struct spu *spu);
139 void (* stop_callback)(struct spu *spu); 139 void (* stop_callback)(struct spu *spu);
140 void (* mfc_callback)(struct spu *spu);
140 141
141 char irq_c0[8]; 142 char irq_c0[8];
142 char irq_c1[8]; 143 char irq_c1[8];