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[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: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2007-06-04 15:15:38 +10:00 committed by Paul Mackerras
parent 05169237b5
commit cbe709c168
1 changed files with 27 additions and 0 deletions
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27
arch/powerpc/platforms/cell/spufs/file.c
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@ -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, },