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authorRalf Baechle <ralf@linux-mips.org>2007-07-27 19:33:18 +0100
committerRalf Baechle <ralf@linux-mips.org>2007-07-31 21:35:25 +0100
commit41790e04e6656fa1aef205ad9a76ab4edbb5f14a (patch)
treefce609dc3c6426e4418ce69926b549dd8db2bcd3 /arch/mips/kernel/vpe.c
parent07cc0c9e65d3e262f871ea357dd77b41950b1ca5 (diff)
[MIPS] RP: Pass number of TCs available to RP program in $2.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/vpe.c')
-rw-r--r--arch/mips/kernel/vpe.c82
1 files changed, 73 insertions, 9 deletions
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index c726c47cd2c..1323cb6d058 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -64,6 +64,10 @@ typedef void *vpe_handle;
/* If this is set, the section belongs in the init part of the module */
#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
+/*
+ * The number of TCs and VPEs physically available on the core
+ */
+static int hw_tcs, hw_vpes;
static char module_name[] = "vpe";
static int major;
static const int minor = 1; /* fixed for now */
@@ -126,6 +130,8 @@ struct vpe {
/* the list of who wants to know when something major happens */
struct list_head notify;
+
+ unsigned int ntcs;
};
struct tc {
@@ -738,6 +744,7 @@ static int vpe_run(struct vpe * v)
* here... Or set $a3 to zero and define DFLT_STACK_SIZE and
* DFLT_HEAP_SIZE when you compile your program
*/
+ mttgpr(6, v->ntcs);
mttgpr(7, physical_memsize);
/* set up VPE1 */
@@ -1333,16 +1340,60 @@ static void kspd_sp_exit( int sp_id)
}
#endif
-static struct device *vpe_dev;
+static ssize_t show_ntcs(struct class_device *cd, char *buf)
+{
+ struct vpe *vpe = get_vpe(tclimit);
+
+ return sprintf(buf, "%d\n", vpe->ntcs);
+}
+
+static ssize_t store_ntcs(struct class_device *dev, const char *buf, size_t len)
+{
+ struct vpe *vpe = get_vpe(tclimit);
+ unsigned long new;
+ char *endp;
+
+ new = simple_strtoul(buf, &endp, 0);
+ if (endp == buf)
+ goto out_einval;
+
+ if (new == 0 || new > (hw_tcs - tclimit))
+ goto out_einval;
+
+ vpe->ntcs = new;
+
+ return len;
+
+out_einval:
+ return -EINVAL;;
+}
+
+static struct class_device_attribute vpe_class_attributes[] = {
+ __ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs),
+ {}
+};
+
+static void vpe_class_device_release(struct class_device *cd)
+{
+ kfree(cd);
+}
+
+struct class vpe_class = {
+ .name = "vpe",
+ .owner = THIS_MODULE,
+ .release = vpe_class_device_release,
+ .class_dev_attrs = vpe_class_attributes,
+};
+
+struct class_device vpe_device;
static int __init vpe_module_init(void)
{
unsigned int mtflags, vpflags;
- int hw_tcs, hw_vpes, tc, err = 0;
unsigned long flags, val;
struct vpe *v = NULL;
- struct device *dev;
struct tc *t;
+ int tc, err;
if (!cpu_has_mipsmt) {
printk("VPE loader: not a MIPS MT capable processor\n");
@@ -1371,13 +1422,22 @@ static int __init vpe_module_init(void)
return major;
}
- dev = device_create(mt_class, NULL, MKDEV(major, minor),
- "vpe%d", minor);
- if (IS_ERR(dev)) {
- err = PTR_ERR(dev);
+ err = class_register(&vpe_class);
+ if (err) {
+ printk(KERN_ERR "vpe_class registration failed\n");
goto out_chrdev;
}
- vpe_dev = dev;
+
+ class_device_initialize(&vpe_device);
+ vpe_device.class = &vpe_class,
+ vpe_device.parent = NULL,
+ strlcpy(vpe_device.class_id, "vpe1", BUS_ID_SIZE);
+ vpe_device.devt = MKDEV(major, minor);
+ err = class_device_add(&vpe_device);
+ if (err) {
+ printk(KERN_ERR "Adding vpe_device failed\n");
+ goto out_class;
+ }
local_irq_save(flags);
mtflags = dmt();
@@ -1422,6 +1482,8 @@ static int __init vpe_module_init(void)
goto out_reenable;
}
+ v->ntcs = hw_tcs - tclimit;
+
/* add the tc to the list of this vpe's tc's. */
list_add(&t->tc, &v->tc);
@@ -1497,6 +1559,8 @@ out_reenable:
#endif
return 0;
+out_class:
+ class_unregister(&vpe_class);
out_chrdev:
unregister_chrdev(major, module_name);
@@ -1514,7 +1578,7 @@ static void __exit vpe_module_exit(void)
}
}
- device_destroy(mt_class, MKDEV(major, minor));
+ class_device_del(&vpe_device);
unregister_chrdev(major, module_name);
}