2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved.
7 * Copyright (C) 2013 Imagination Technologies Ltd.
9 #include <linux/kernel.h>
10 #include <linux/device.h>
12 #include <linux/slab.h>
13 #include <linux/export.h>
19 void cleanup_tc(struct tc *tc)
24 static ssize_t store_kill(struct device *dev, struct device_attribute *attr,
25 const char *buf, size_t len)
27 struct vpe *vpe = get_vpe(aprp_cpu_index());
28 struct vpe_notifications *notifier;
30 list_for_each_entry(notifier, &vpe->notify, list)
31 notifier->stop(aprp_cpu_index());
33 release_progmem(vpe->load_addr);
34 vpe->state = VPE_STATE_UNUSED;
38 static DEVICE_ATTR(kill, S_IWUSR, NULL, store_kill);
40 static ssize_t ntcs_show(struct device *cd, struct device_attribute *attr,
43 struct vpe *vpe = get_vpe(aprp_cpu_index());
45 return sprintf(buf, "%d\n", vpe->ntcs);
48 static ssize_t ntcs_store(struct device *dev, struct device_attribute *attr,
49 const char *buf, size_t len)
51 struct vpe *vpe = get_vpe(aprp_cpu_index());
55 ret = kstrtoul(buf, 0, &new);
59 /* APRP can only reserve one TC in a VPE and no more. */
67 static DEVICE_ATTR_RW(ntcs);
69 static struct attribute *vpe_attrs[] = {
74 ATTRIBUTE_GROUPS(vpe);
76 static void vpe_device_release(struct device *cd)
80 static struct class vpe_class = {
83 .dev_release = vpe_device_release,
84 .dev_groups = vpe_groups,
87 static struct device vpe_device;
89 int __init vpe_module_init(void)
95 if (!cpu_has_mipsmt) {
96 pr_warn("VPE loader: not a MIPS MT capable processor\n");
100 if (num_possible_cpus() - aprp_cpu_index() < 1) {
101 pr_warn("No VPEs reserved for AP/SP, not initialize VPE loader\n"
102 "Pass maxcpus=<n> argument as kernel argument\n");
106 major = register_chrdev(0, VPE_MODULE_NAME, &vpe_fops);
108 pr_warn("VPE loader: unable to register character device\n");
112 err = class_register(&vpe_class);
114 pr_err("vpe_class registration failed\n");
118 device_initialize(&vpe_device);
119 vpe_device.class = &vpe_class;
120 vpe_device.parent = NULL;
121 dev_set_name(&vpe_device, "vpe_sp");
122 vpe_device.devt = MKDEV(major, VPE_MODULE_MINOR);
123 err = device_add(&vpe_device);
125 pr_err("Adding vpe_device failed\n");
129 t = alloc_tc(aprp_cpu_index());
131 pr_warn("VPE: unable to allocate TC\n");
137 v = alloc_vpe(aprp_cpu_index());
139 pr_warn("VPE: unable to allocate VPE\n");
147 /* add the tc to the list of this vpe's tc's. */
148 list_add(&t->tc, &v->tc);
151 t->pvpe = v; /* set the parent vpe */
156 device_del(&vpe_device);
159 put_device(&vpe_device);
160 class_unregister(&vpe_class);
163 unregister_chrdev(major, VPE_MODULE_NAME);
168 void __exit vpe_module_exit(void)
172 device_unregister(&vpe_device);
173 class_unregister(&vpe_class);
174 unregister_chrdev(major, VPE_MODULE_NAME);
176 /* No locking needed here */
177 list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list)
178 if (v->state != VPE_STATE_UNUSED)