From a33a7d7309d79656bc19a0e96fc4547a1633283e Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 23 Mar 2006 00:00:11 +0100 Subject: [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 Signed-off-by: Paul Mackerras --- include/asm-powerpc/spu.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-powerpc/spu.h') 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]; -- cgit v1.2.3