Commit | Line | Data |
---|---|---|
800f879a AT |
1 | /* |
2 | * Copyright 2010-2017 Intel Corporation. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License, version 2, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * Disclaimer: The codes contained in these modules may be specific to | |
14 | * the Intel Software Development Platform codenamed Knights Ferry, | |
15 | * and the Intel product codenamed Knights Corner, and are not backward | |
16 | * compatible with other Intel products. Additionally, Intel will NOT | |
17 | * support the codes or instruction set in future products. | |
18 | * | |
19 | * Intel offers no warranty of any kind regarding the code. This code is | |
20 | * licensed on an "AS IS" basis and Intel is not obligated to provide | |
21 | * any support, assistance, installation, training, or other services | |
22 | * of any kind. Intel is also not obligated to provide any updates, | |
23 | * enhancements or extensions. Intel specifically disclaims any warranty | |
24 | * of merchantability, non-infringement, fitness for any particular | |
25 | * purpose, and any other warranty. | |
26 | * | |
27 | * Further, Intel disclaims all liability of any kind, including but | |
28 | * not limited to liability for infringement of any proprietary rights, | |
29 | * relating to the use of the code, even if Intel is notified of the | |
30 | * possibility of such liability. Except as expressly stated in an Intel | |
31 | * license agreement provided with this code and agreed upon with Intel, | |
32 | * no license, express or implied, by estoppel or otherwise, to any | |
33 | * intellectual property rights is granted herein. | |
34 | */ | |
35 | ||
36 | #include <linux/module.h> | |
37 | #include <linux/init.h> | |
38 | #include <scif.h> | |
39 | #include <linux/errno.h> | |
40 | #include <linux/hardirq.h> | |
41 | #include <linux/types.h> | |
42 | #include <linux/capability.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/string.h> | |
45 | #include <linux/gfp.h> | |
46 | #include <linux/vmalloc.h> | |
47 | #include <asm/io.h> | |
48 | #include <linux/kernel.h> | |
49 | #include <linux/mm_types.h> | |
50 | #include <linux/jiffies.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/irqflags.h> | |
53 | #include <linux/time.h> | |
54 | #include <linux/spinlock.h> | |
55 | #include <linux/mutex.h> | |
56 | #include <linux/semaphore.h> | |
57 | #include <linux/kthread.h> | |
58 | #include <linux/sched.h> | |
59 | #include <linux/delay.h> | |
60 | #include <linux/wait.h> | |
61 | #include <asm/bug.h> | |
62 | #include <linux/pci.h> | |
63 | #include <linux/device.h> | |
64 | #include <linux/fs.h> | |
65 | #include <linux/list.h> | |
66 | #include <linux/workqueue.h> | |
67 | #include <linux/interrupt.h> | |
68 | #include <asm/atomic.h> | |
69 | #include <linux/netdevice.h> | |
70 | #include <linux/debugfs.h> | |
71 | ||
72 | #define ACPT_BOOTED 1 | |
73 | #define ACPT_BOOT_ACK 2 | |
74 | #define ACPT_NACK_VERSION 3 | |
75 | #define ACPT_REQUEST_TIME 4 | |
76 | #define ACPT_TIME_DATA 5 | |
77 | ||
78 | #define ACPT_VERSION 1 | |
79 | ||
80 | static dev_t dev; | |
81 | static struct class *class; | |
82 | static struct device *mbdev; | |
83 | ||
84 | static int host_notified; | |
85 | static struct timespec tod; | |
86 | static int timeset = 0; | |
87 | ||
88 | static ssize_t | |
89 | show_timesync(struct device *dev, struct device_attribute *attr, char *buf) | |
90 | { | |
91 | return snprintf(buf, PAGE_SIZE, "Time: %s\n", timeset? "set" : "not set"); | |
92 | } | |
93 | ||
94 | static ssize_t | |
95 | set_synctime(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) | |
96 | { | |
97 | struct scif_portID port = {0, MIC_NOTIFY}; | |
98 | static scif_epd_t epd; | |
99 | int proto = ACPT_REQUEST_TIME; | |
100 | int version = ACPT_VERSION; | |
101 | int err; | |
102 | ||
103 | epd = scif_open(); | |
104 | ||
105 | if ((err = scif_connect(epd, &port))) { | |
106 | printk("MPSSBOOT error, synctime connect failed: %d\n", err); | |
107 | goto close_synctime; | |
108 | } | |
109 | ||
110 | if ((err = scif_send(epd, &version, sizeof(version), 0)) != sizeof(version)) { | |
111 | printk("MPSSBOOT send version failed: %d\n", err); | |
112 | goto close_synctime; | |
113 | } | |
114 | ||
115 | if ((err = scif_send(epd, &proto, sizeof(proto), 0)) != sizeof(proto)) { | |
116 | printk("MPSSBOOT send boot finished failed: %d\n", err); | |
117 | goto close_synctime; | |
118 | } | |
119 | ||
120 | if ((err = scif_recv(epd, &proto, sizeof(proto), SCIF_RECV_BLOCK)) != sizeof(proto)) { | |
121 | printk("MPSSBOOT protocol recv ack failed: %d\n", err); | |
122 | goto close_synctime; | |
123 | } | |
124 | ||
125 | if (proto != ACPT_TIME_DATA) { | |
126 | printk("MPSSBOOT failed to receive time data packet %d\n", proto); | |
127 | goto close_synctime; | |
128 | } | |
129 | ||
130 | if ((err = scif_recv(epd, &tod, sizeof(tod), SCIF_RECV_BLOCK)) != sizeof(tod)) { | |
131 | printk("MPSSBOOT time data read size failed: %d\n", err); | |
132 | goto close_synctime; | |
133 | } | |
134 | ||
135 | do_settimeofday(&tod); | |
136 | printk("MPSSBOOT Time of day sycned with host\n"); | |
137 | timeset = 1; | |
138 | ||
139 | close_synctime: | |
140 | scif_close(epd); | |
141 | return count; | |
142 | } | |
143 | static DEVICE_ATTR(synctime, S_IRUGO | S_IWUSR, show_timesync, set_synctime); | |
144 | ||
145 | static ssize_t | |
146 | show_host_notified(struct device *dev, struct device_attribute *attr, char *buf) | |
147 | { | |
148 | return snprintf(buf, PAGE_SIZE, "%d\n", host_notified); | |
149 | } | |
150 | ||
151 | static ssize_t | |
152 | set_host_notified(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) | |
153 | { | |
154 | struct scif_portID port = {0, MIC_NOTIFY}; | |
155 | static scif_epd_t epd; | |
156 | int proto = ACPT_BOOTED; | |
157 | int version = ACPT_VERSION; | |
158 | int err; | |
159 | ||
160 | epd = scif_open(); | |
161 | ||
162 | if ((err = scif_connect(epd, &port))) { | |
163 | printk("MPSSBOOT error, notify connect failed: %d\n", err); | |
164 | goto close_notify; | |
165 | } | |
166 | ||
167 | if ((err = scif_send(epd, &version, sizeof(version), 0)) != sizeof(version)) { | |
168 | printk("MPSSBOOT send version failed: %d\n", err); | |
169 | goto close_notify; | |
170 | } | |
171 | ||
172 | if ((err = scif_send(epd, &proto, sizeof(proto), 0)) != sizeof(proto)) { | |
173 | printk("MPSSBOOT send boot finished failed: %d\n", err); | |
174 | goto close_notify; | |
175 | } | |
176 | ||
177 | if ((err = scif_recv(epd, &proto, sizeof(proto), SCIF_RECV_BLOCK)) != sizeof(proto)) { | |
178 | printk("MPSSBOOT protocol recv ack failed: %d\n", err); | |
179 | goto close_notify; | |
180 | } | |
181 | ||
182 | if (proto != ACPT_BOOT_ACK) | |
183 | printk("MPSSBOOT failed to receive boot ACK, got %d\n", proto); | |
184 | else | |
185 | printk("MPSSBOOT Boot acknowledged\n"); | |
186 | ||
187 | close_notify: | |
188 | scif_close(epd); | |
189 | return count; | |
190 | } | |
191 | static DEVICE_ATTR(host_notified, S_IRUGO | S_IWUSR, show_host_notified, set_host_notified); | |
192 | ||
193 | static struct attribute *mb_attributes[] = { | |
194 | &dev_attr_synctime.attr, | |
195 | &dev_attr_host_notified.attr, | |
196 | NULL | |
197 | }; | |
198 | ||
199 | struct attribute_group mb_attr_group = { | |
200 | .attrs = mb_attributes | |
201 | }; | |
202 | ||
203 | /* This function closes the endpoint established on init */ | |
204 | static void | |
205 | mpssboot_exit(void) | |
206 | { | |
207 | sysfs_remove_group(&mbdev->kobj, &mb_attr_group); | |
208 | device_destroy(class, dev); | |
209 | class_destroy(class); | |
210 | } | |
211 | ||
212 | static char * | |
213 | mpssboot_devnode(struct device *dev, mode_t *mode) | |
214 | { | |
215 | return kasprintf(GFP_KERNEL, "%s", dev_name(dev)); | |
216 | } | |
217 | ||
218 | /* This function initializes a SCIF connection to the host */ | |
219 | static int | |
220 | mpssboot_init(void) | |
221 | { | |
222 | //static struct device dev; | |
223 | int result; | |
224 | ||
225 | alloc_chrdev_region(&dev, 0, 2, "micnotify"); | |
226 | class = class_create(THIS_MODULE, "micnotify"); | |
227 | class->devnode = mpssboot_devnode; | |
228 | mbdev = device_create(class, NULL, dev, NULL, "notify"); | |
229 | ||
230 | result = sysfs_create_group(&mbdev->kobj, &mb_attr_group); | |
231 | result = result; | |
232 | return 0; | |
233 | } | |
234 | ||
235 | module_init(mpssboot_init); | |
236 | module_exit(mpssboot_exit); | |
237 | MODULE_LICENSE("GPL"); | |
238 |