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Commit cbe709c1 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Paul Mackerras
Browse files

[POWERPC] spufs: Add a "capabilities" file to spu contexts 



This adds a "capabilities" file to spu contexts consisting of a
list of linefeed separated capability names. The current exposed
capabilities are "sched" (the context is scheduleable) and
"step" (the context supports single stepping).

Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: default avatarJeremy Kerr <jk@ozlabs.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 05169237

arch/powerpc/platforms/cell/spufs/file.c

+27 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/pagemap.h>

#include <linux/poll.h>

#include <linux/ptrace.h>

#include <linux/seq_file.h>



#include <asm/io.h>

#include <asm/semaphore.h>
@@ -39,6 +40,7 @@ 


#define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000)





static int

spufs_mem_open(struct inode *inode, struct file *file)

{
@@ -1797,6 +1799,29 @@ static int spufs_info_open(struct inode *inode, struct file *file) 
	return 0;

}



static int spufs_caps_show(struct seq_file *s, void *private)

{

	struct spu_context *ctx = s->private;



	if (!(ctx->flags & SPU_CREATE_NOSCHED))

		seq_puts(s, "sched\n");

	if (!(ctx->flags & SPU_CREATE_ISOLATE))

		seq_puts(s, "step\n");

	return 0;

}



static int spufs_caps_open(struct inode *inode, struct file *file)

{

	return single_open(file, spufs_caps_show, SPUFS_I(inode)->i_ctx);

}



static const struct file_operations spufs_caps_fops = {

	.open		= spufs_caps_open,

	.read		= seq_read,

	.llseek		= seq_lseek,

	.release	= single_release,

};



static ssize_t __spufs_mbox_info_read(struct spu_context *ctx,

			char __user *buf, size_t len, loff_t *pos)

{
@@ -2015,6 +2040,7 @@ static const struct file_operations spufs_proxydma_info_fops = { 
};



struct tree_descr spufs_dir_contents[] = {

	{ "capabilities", &spufs_caps_fops, 0444, },

	{ "mem",  &spufs_mem_fops,  0666, },

	{ "regs", &spufs_regs_fops,  0666, },

	{ "mbox", &spufs_mbox_fops, 0444, },
@@ -2050,6 +2076,7 @@ struct tree_descr spufs_dir_contents[] = { 
};



struct tree_descr spufs_dir_nosched_contents[] = {

	{ "capabilities", &spufs_caps_fops, 0444, },

	{ "mem",  &spufs_mem_fops,  0666, },

	{ "mbox", &spufs_mbox_fops, 0444, },

	{ "ibox", &spufs_ibox_fops, 0444, },