| 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/string.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/kernel.h> |
| 39 | #include <linux/err.h> |
| 40 | #include <micint.h> |
| 41 | |
| 42 | #include <scif.h> |
| 43 | #include <mic_common.h> |
| 44 | |
| 45 | #define ACPT_BACKLOG 120 |
| 46 | #define ACPT_POLL_MS 2000 |
| 47 | |
| 48 | #define ACPT_BOOTED 1 |
| 49 | #define ACPT_BOOT_ACK 2 |
| 50 | #define ACPT_NACK_VERSION 3 |
| 51 | #define ACPT_REQUEST_TIME 4 |
| 52 | #define ACPT_TIME_DATA 5 |
| 53 | |
| 54 | #define ACPT_VERSION 1 |
| 55 | |
| 56 | static acptboot_data_t *acptboot_data; |
| 57 | |
| 58 | |
| 59 | void acptboot_getconn(struct work_struct *work) |
| 60 | { |
| 61 | mic_ctx_t *node_ctx; |
| 62 | struct scif_portID data; |
| 63 | scif_epd_t conn_epd; |
| 64 | struct timespec tod; |
| 65 | int proto; |
| 66 | int version; |
| 67 | int err; |
| 68 | |
| 69 | if ((err = scif_accept(acptboot_data->listen_epd, &data, &conn_epd, |
| 70 | SCIF_ACCEPT_SYNC))) { |
| 71 | pr_debug("ACPTBOOT: scif_accept_failed %d\n", err); |
| 72 | return; |
| 73 | |
| 74 | //goto requeue_accept; |
| 75 | } |
| 76 | |
| 77 | if (!data.node) { |
| 78 | printk(KERN_ERR "ACPTBOOT: connect received from invalid dev %d\n", |
| 79 | -EINVAL); |
| 80 | goto close_epd; |
| 81 | } |
| 82 | |
| 83 | if ((err = scif_recv(conn_epd, &version, sizeof(version), SCIF_RECV_BLOCK)) != sizeof(version)) { |
| 84 | printk(KERN_ERR "ACPTBOOT: failed to recieve version number err %d\n", err); |
| 85 | goto close_epd; |
| 86 | } |
| 87 | |
| 88 | if ((err = scif_recv(conn_epd, &proto, sizeof(proto), SCIF_RECV_BLOCK)) != sizeof(proto)) { |
| 89 | printk(KERN_ERR "ACPTBOOT: failed to recieve proto id %d\n", err); |
| 90 | goto close_epd; |
| 91 | } |
| 92 | |
| 93 | switch (proto) { |
| 94 | case ACPT_BOOTED: |
| 95 | node_ctx = get_per_dev_ctx(data.node - 1); |
| 96 | mic_setstate(node_ctx, MIC_ONLINE); |
| 97 | node_ctx->boot_count++; |
| 98 | |
| 99 | proto = ACPT_BOOT_ACK; |
| 100 | scif_send(conn_epd, &proto, sizeof(proto), SCIF_SEND_BLOCK); |
| 101 | break; |
| 102 | |
| 103 | case ACPT_REQUEST_TIME: |
| 104 | getnstimeofday(&tod); |
| 105 | proto = ACPT_TIME_DATA; |
| 106 | scif_send(conn_epd, &proto, sizeof(proto), SCIF_SEND_BLOCK); |
| 107 | scif_send(conn_epd, &tod, sizeof(tod), SCIF_SEND_BLOCK); |
| 108 | break; |
| 109 | } |
| 110 | |
| 111 | close_epd: |
| 112 | if ((err = scif_close(conn_epd))) |
| 113 | printk(KERN_ERR "ACPTBOOT: scif_close failed %d\n", err); |
| 114 | |
| 115 | //requeue_accept: |
| 116 | queue_work(acptboot_data->acptbootwq, &acptboot_data->acptbootwork); |
| 117 | } |
| 118 | |
| 119 | void acptboot_exit(void) |
| 120 | { |
| 121 | int err = 0; |
| 122 | if (acptboot_data) { |
| 123 | if (acptboot_data->listen_epd) |
| 124 | if ((err = scif_close(acptboot_data->listen_epd)) < 0) |
| 125 | pr_debug("scif_close failed %d\n", err); |
| 126 | destroy_workqueue(acptboot_data->acptbootwq); |
| 127 | |
| 128 | kfree(acptboot_data); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | int |
| 133 | acptboot_init(void) |
| 134 | { |
| 135 | int err, ret; |
| 136 | |
| 137 | acptboot_data = (acptboot_data_t *)kzalloc(sizeof(*acptboot_data), GFP_KERNEL); |
| 138 | |
| 139 | if (!acptboot_data) { |
| 140 | printk(KERN_ERR "ACPTBOOT: memory allocation failure\n"); |
| 141 | return -ENOMEM; |
| 142 | } |
| 143 | |
| 144 | acptboot_data->listen_epd = scif_open(); |
| 145 | |
| 146 | if (!acptboot_data->listen_epd) { |
| 147 | printk(KERN_ERR "ACPTBOOT: scif_open() failed!\n"); |
| 148 | err = -ENOMEM; |
| 149 | goto error; |
| 150 | } |
| 151 | |
| 152 | err = scif_bind(acptboot_data->listen_epd, MIC_NOTIFY); |
| 153 | if (err < 0) { |
| 154 | pr_debug("ACPTBOOT: scif_bind() failed! %d\n", err); |
| 155 | goto error; |
| 156 | } |
| 157 | |
| 158 | acptboot_data->acptboot_pn = err; |
| 159 | |
| 160 | err = scif_listen(acptboot_data->listen_epd, ACPT_BACKLOG); |
| 161 | if (err < 0) { |
| 162 | pr_debug("scif_listen() failed! %d\n", err); |
| 163 | goto error; |
| 164 | |
| 165 | } |
| 166 | |
| 167 | pr_debug("ACPT endpoint listening port %d\n", |
| 168 | acptboot_data->acptboot_pn); |
| 169 | |
| 170 | // Create workqueue |
| 171 | acptboot_data->acptbootwq = __mic_create_singlethread_workqueue( |
| 172 | "ACPTBOOT_WQ"); |
| 173 | |
| 174 | if (!acptboot_data->acptbootwq) { |
| 175 | printk(KERN_ERR "%s %d wq creation failed!\n", __func__, __LINE__); |
| 176 | goto error; |
| 177 | } |
| 178 | |
| 179 | INIT_WORK(&acptboot_data->acptbootwork, acptboot_getconn); |
| 180 | queue_work(acptboot_data->acptbootwq, |
| 181 | &acptboot_data->acptbootwork); |
| 182 | return 0; |
| 183 | |
| 184 | error: |
| 185 | |
| 186 | if (acptboot_data->listen_epd) |
| 187 | if ((ret = scif_close(acptboot_data->listen_epd)) < 0) |
| 188 | pr_debug("ACPTBOOT: scif_close() failed! %d\n", ret); |
| 189 | |
| 190 | kfree(acptboot_data); |
| 191 | |
| 192 | return err; |
| 193 | } |
| 194 | |