Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Intel Management Engine Interface (Intel MEI) Linux driver |
| 4 | * Copyright (c) 2003-2012, Intel Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/pci.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/wait.h> |
| 20 | #include <linux/mei.h> |
| 21 | |
| 22 | #include "mei_dev.h" |
Tomas Winkler | 0edb23f | 2013-01-08 23:07:12 +0200 | [diff] [blame] | 23 | #include "hbm.h" |
Tomas Winkler | 9dc64d6 | 2013-01-08 23:07:17 +0200 | [diff] [blame] | 24 | #include "hw-me.h" |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 25 | |
| 26 | /** |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 27 | * mei_hbm_me_cl_allocate - allocates storage for me clients |
| 28 | * |
| 29 | * @dev: the device structure |
| 30 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 31 | * returns 0 on success -ENOMEM on allocation failure |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 32 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 33 | static int mei_hbm_me_cl_allocate(struct mei_device *dev) |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 34 | { |
| 35 | struct mei_me_client *clients; |
| 36 | int b; |
| 37 | |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 38 | dev->me_clients_num = 0; |
| 39 | dev->me_client_presentation_num = 0; |
| 40 | dev->me_client_index = 0; |
| 41 | |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 42 | /* count how many ME clients we have */ |
| 43 | for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX) |
| 44 | dev->me_clients_num++; |
| 45 | |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 46 | if (dev->me_clients_num == 0) |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 47 | return 0; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 48 | |
| 49 | kfree(dev->me_clients); |
| 50 | dev->me_clients = NULL; |
| 51 | |
Tomas Winkler | e19555c | 2013-09-02 03:11:03 +0300 | [diff] [blame] | 52 | dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%ld.\n", |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 53 | dev->me_clients_num * sizeof(struct mei_me_client)); |
| 54 | /* allocate storage for ME clients representation */ |
| 55 | clients = kcalloc(dev->me_clients_num, |
| 56 | sizeof(struct mei_me_client), GFP_KERNEL); |
| 57 | if (!clients) { |
| 58 | dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 59 | return -ENOMEM; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 60 | } |
| 61 | dev->me_clients = clients; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 62 | return 0; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | /** |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 66 | * mei_hbm_cl_hdr - construct client hbm header |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 67 | * |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 68 | * @cl: - client |
| 69 | * @hbm_cmd: host bus message command |
| 70 | * @buf: buffer for cl header |
| 71 | * @len: buffer length |
| 72 | */ |
| 73 | static inline |
| 74 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) |
| 75 | { |
| 76 | struct mei_hbm_cl_cmd *cmd = buf; |
| 77 | |
| 78 | memset(cmd, 0, len); |
| 79 | |
| 80 | cmd->hbm_cmd = hbm_cmd; |
| 81 | cmd->host_addr = cl->host_client_id; |
| 82 | cmd->me_addr = cl->me_client_id; |
| 83 | } |
| 84 | |
| 85 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 86 | * mei_hbm_cl_addr_equal - tells if they have the same address |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 87 | * |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 88 | * @cl: - client |
| 89 | * @buf: buffer with cl header |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 90 | * |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 91 | * returns true if addresses are the same |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 92 | */ |
| 93 | static inline |
| 94 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) |
| 95 | { |
| 96 | struct mei_hbm_cl_cmd *cmd = buf; |
| 97 | return cl->host_client_id == cmd->host_addr && |
| 98 | cl->me_client_id == cmd->me_addr; |
| 99 | } |
| 100 | |
| 101 | |
| 102 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 103 | * is_treat_specially_client - checks if the message belongs |
| 104 | * to the file private data. |
| 105 | * |
| 106 | * @cl: private data of the file object |
| 107 | * @rs: connect response bus message |
| 108 | * |
| 109 | */ |
| 110 | static bool is_treat_specially_client(struct mei_cl *cl, |
| 111 | struct hbm_client_connect_response *rs) |
| 112 | { |
| 113 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 114 | if (!rs->status) { |
| 115 | cl->state = MEI_FILE_CONNECTED; |
| 116 | cl->status = 0; |
| 117 | |
| 118 | } else { |
| 119 | cl->state = MEI_FILE_DISCONNECTED; |
| 120 | cl->status = -ENODEV; |
| 121 | } |
| 122 | cl->timer_count = 0; |
| 123 | |
| 124 | return true; |
| 125 | } |
| 126 | return false; |
| 127 | } |
| 128 | |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 129 | /** |
| 130 | * mei_hbm_idle - set hbm to idle state |
| 131 | * |
| 132 | * @dev: the device structure |
| 133 | */ |
| 134 | void mei_hbm_idle(struct mei_device *dev) |
| 135 | { |
| 136 | dev->init_clients_timer = 0; |
| 137 | dev->hbm_state = MEI_HBM_IDLE; |
| 138 | } |
| 139 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 140 | int mei_hbm_start_wait(struct mei_device *dev) |
| 141 | { |
| 142 | int ret; |
| 143 | if (dev->hbm_state > MEI_HBM_START) |
| 144 | return 0; |
| 145 | |
| 146 | mutex_unlock(&dev->device_lock); |
| 147 | ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, |
| 148 | dev->hbm_state == MEI_HBM_IDLE || |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 149 | dev->hbm_state >= MEI_HBM_STARTED, |
Tomas Winkler | 7d93e58 | 2014-01-14 23:10:10 +0200 | [diff] [blame^] | 150 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 151 | mutex_lock(&dev->device_lock); |
| 152 | |
| 153 | if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) { |
| 154 | dev->hbm_state = MEI_HBM_IDLE; |
Masanari Iida | 8b513d0 | 2013-05-21 23:13:12 +0900 | [diff] [blame] | 155 | dev_err(&dev->pdev->dev, "waiting for mei start failed\n"); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 156 | return -ETIMEDOUT; |
| 157 | } |
| 158 | return 0; |
| 159 | } |
| 160 | |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 161 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 162 | * mei_hbm_start_req - sends start request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 163 | * |
| 164 | * @dev: the device structure |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 165 | * |
| 166 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 167 | */ |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 168 | int mei_hbm_start_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 169 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 170 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 171 | struct hbm_host_version_request *start_req; |
| 172 | const size_t len = sizeof(struct hbm_host_version_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 173 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 174 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 175 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 176 | |
| 177 | /* host start message */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 178 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 179 | memset(start_req, 0, len); |
| 180 | start_req->hbm_cmd = HOST_START_REQ_CMD; |
| 181 | start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 182 | start_req->host_version.minor_version = HBM_MINOR_VERSION; |
| 183 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 184 | dev->hbm_state = MEI_HBM_IDLE; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 185 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 186 | if (ret) { |
| 187 | dev_err(&dev->pdev->dev, "version message write failed: ret = %d\n", |
| 188 | ret); |
| 189 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 190 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 191 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 192 | dev->hbm_state = MEI_HBM_START; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 193 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 194 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 195 | } |
| 196 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 197 | /* |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 198 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 199 | * |
| 200 | * @dev: the device structure |
| 201 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 202 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 203 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 204 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 205 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 206 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 207 | struct hbm_host_enum_request *enum_req; |
| 208 | const size_t len = sizeof(struct hbm_host_enum_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 209 | int ret; |
| 210 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 211 | /* enumerate clients */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 212 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 213 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 214 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
| 215 | memset(enum_req, 0, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 216 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
| 217 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 218 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 219 | if (ret) { |
| 220 | dev_err(&dev->pdev->dev, "enumeration request write failed: ret = %d.\n", |
| 221 | ret); |
| 222 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 223 | } |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 224 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 225 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 226 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 227 | } |
| 228 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 229 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 230 | * mei_hbm_prop_req - request property for a single client |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 231 | * |
| 232 | * @dev: the device structure |
| 233 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 234 | * returns 0 on success and < 0 on failure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 235 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 236 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 237 | static int mei_hbm_prop_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 238 | { |
| 239 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 240 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 241 | struct hbm_props_request *prop_req; |
| 242 | const size_t len = sizeof(struct hbm_props_request); |
| 243 | unsigned long next_client_index; |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 244 | unsigned long client_num; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 245 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 246 | |
| 247 | client_num = dev->me_client_presentation_num; |
| 248 | |
| 249 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
| 250 | dev->me_client_index); |
| 251 | |
| 252 | /* We got all client properties */ |
| 253 | if (next_client_index == MEI_CLIENTS_MAX) { |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 254 | dev->hbm_state = MEI_HBM_STARTED; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 255 | schedule_work(&dev->init_work); |
| 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | dev->me_clients[client_num].client_id = next_client_index; |
| 261 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; |
| 262 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 263 | mei_hbm_hdr(mei_hdr, len); |
| 264 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 265 | |
| 266 | memset(prop_req, 0, sizeof(struct hbm_props_request)); |
| 267 | |
| 268 | |
| 269 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
| 270 | prop_req->address = next_client_index; |
| 271 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 272 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 273 | if (ret) { |
| 274 | dev_err(&dev->pdev->dev, "properties request write failed: ret = %d\n", |
| 275 | ret); |
| 276 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 280 | dev->me_client_index = next_client_index; |
| 281 | |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 286 | * mei_hbm_stop_req_prepare - prepare stop request message |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 287 | * |
| 288 | * @dev - mei device |
| 289 | * @mei_hdr - mei message header |
| 290 | * @data - hbm message body buffer |
| 291 | */ |
| 292 | static void mei_hbm_stop_req_prepare(struct mei_device *dev, |
| 293 | struct mei_msg_hdr *mei_hdr, unsigned char *data) |
| 294 | { |
| 295 | struct hbm_host_stop_request *req = |
| 296 | (struct hbm_host_stop_request *)data; |
| 297 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 298 | |
| 299 | mei_hbm_hdr(mei_hdr, len); |
| 300 | |
| 301 | memset(req, 0, len); |
| 302 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 303 | req->reason = DRIVER_STOP_REQUEST; |
| 304 | } |
| 305 | |
| 306 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 307 | * mei_hbm_cl_flow_control_req - sends flow control request. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 308 | * |
| 309 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 310 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 311 | * |
| 312 | * This function returns -EIO on write failure |
| 313 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 314 | int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 315 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 316 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 317 | const size_t len = sizeof(struct hbm_flow_control); |
| 318 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 319 | mei_hbm_hdr(mei_hdr, len); |
| 320 | mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 321 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 322 | dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n", |
| 323 | cl->host_client_id, cl->me_client_id); |
| 324 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 325 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 329 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 330 | * |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 331 | * @dev: the device structure |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 332 | * @flow: flow control. |
| 333 | */ |
| 334 | static void mei_hbm_add_single_flow_creds(struct mei_device *dev, |
| 335 | struct hbm_flow_control *flow) |
| 336 | { |
| 337 | struct mei_me_client *client; |
| 338 | int i; |
| 339 | |
| 340 | for (i = 0; i < dev->me_clients_num; i++) { |
| 341 | client = &dev->me_clients[i]; |
| 342 | if (client && flow->me_addr == client->client_id) { |
| 343 | if (client->props.single_recv_buf) { |
| 344 | client->mei_flow_ctrl_creds++; |
| 345 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", |
| 346 | flow->me_addr); |
| 347 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", |
| 348 | client->mei_flow_ctrl_creds); |
| 349 | } else { |
| 350 | BUG(); /* error in flow control */ |
| 351 | } |
| 352 | } |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 358 | * |
| 359 | * @dev: the device structure |
| 360 | * @flow_control: flow control response bus message |
| 361 | */ |
| 362 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
| 363 | struct hbm_flow_control *flow_control) |
| 364 | { |
| 365 | struct mei_cl *cl = NULL; |
| 366 | struct mei_cl *next = NULL; |
| 367 | |
| 368 | if (!flow_control->host_addr) { |
| 369 | /* single receive buffer */ |
| 370 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 371 | return; |
| 372 | } |
| 373 | |
| 374 | /* normal connection */ |
| 375 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 376 | if (mei_hbm_cl_addr_equal(cl, flow_control)) { |
| 377 | cl->mei_flow_ctrl_creds++; |
| 378 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", |
| 379 | flow_control->host_addr, flow_control->me_addr); |
| 380 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", |
| 381 | cl->mei_flow_ctrl_creds); |
| 382 | break; |
| 383 | } |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | |
| 388 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 389 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 390 | * |
| 391 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 392 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 393 | * |
| 394 | * This function returns -EIO on write failure |
| 395 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 396 | int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 397 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 398 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 399 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 400 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 401 | mei_hbm_hdr(mei_hdr, len); |
| 402 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 403 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 404 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 408 | * mei_hbm_cl_disconnect_res - disconnect response from ME |
| 409 | * |
| 410 | * @dev: the device structure |
| 411 | * @rs: disconnect response bus message |
| 412 | */ |
| 413 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, |
| 414 | struct hbm_client_connect_response *rs) |
| 415 | { |
| 416 | struct mei_cl *cl; |
| 417 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 418 | |
| 419 | dev_dbg(&dev->pdev->dev, |
| 420 | "disconnect_response:\n" |
| 421 | "ME Client = %d\n" |
| 422 | "Host Client = %d\n" |
| 423 | "Status = %d\n", |
| 424 | rs->me_addr, |
| 425 | rs->host_addr, |
| 426 | rs->status); |
| 427 | |
| 428 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 429 | cl = pos->cl; |
| 430 | |
| 431 | if (!cl) { |
| 432 | list_del(&pos->list); |
| 433 | return; |
| 434 | } |
| 435 | |
| 436 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); |
| 437 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 438 | list_del(&pos->list); |
| 439 | if (!rs->status) |
| 440 | cl->state = MEI_FILE_DISCONNECTED; |
| 441 | |
| 442 | cl->status = 0; |
| 443 | cl->timer_count = 0; |
| 444 | break; |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 450 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 451 | * |
| 452 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 453 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 454 | * |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 455 | * returns -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 456 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 457 | int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 458 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 459 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 460 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 461 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 462 | mei_hbm_hdr(mei_hdr, len); |
| 463 | mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 464 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 465 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 469 | * mei_hbm_cl_connect_res - connect response from the ME |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 470 | * |
| 471 | * @dev: the device structure |
| 472 | * @rs: connect response bus message |
| 473 | */ |
| 474 | static void mei_hbm_cl_connect_res(struct mei_device *dev, |
| 475 | struct hbm_client_connect_response *rs) |
| 476 | { |
| 477 | |
| 478 | struct mei_cl *cl; |
| 479 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 480 | |
| 481 | dev_dbg(&dev->pdev->dev, |
| 482 | "connect_response:\n" |
| 483 | "ME Client = %d\n" |
| 484 | "Host Client = %d\n" |
| 485 | "Status = %d\n", |
| 486 | rs->me_addr, |
| 487 | rs->host_addr, |
| 488 | rs->status); |
| 489 | |
| 490 | /* if WD or iamthif client treat specially */ |
| 491 | |
| 492 | if (is_treat_specially_client(&dev->wd_cl, rs)) { |
| 493 | dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); |
| 494 | mei_watchdog_register(dev); |
| 495 | |
| 496 | return; |
| 497 | } |
| 498 | |
| 499 | if (is_treat_specially_client(&dev->iamthif_cl, rs)) { |
| 500 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
| 501 | return; |
| 502 | } |
| 503 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 504 | |
| 505 | cl = pos->cl; |
| 506 | if (!cl) { |
| 507 | list_del(&pos->list); |
| 508 | return; |
| 509 | } |
| 510 | if (pos->fop_type == MEI_FOP_IOCTL) { |
| 511 | if (is_treat_specially_client(cl, rs)) { |
| 512 | list_del(&pos->list); |
| 513 | cl->status = 0; |
| 514 | cl->timer_count = 0; |
| 515 | break; |
| 516 | } |
| 517 | } |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | |
| 522 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 523 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
| 524 | * host sends disconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 525 | * |
| 526 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 527 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 528 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 529 | static void mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 530 | struct hbm_client_connect_request *disconnect_req) |
| 531 | { |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 532 | struct mei_cl *cl, *next; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 533 | const size_t len = sizeof(struct hbm_client_connect_response); |
| 534 | |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 535 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 536 | if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 537 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", |
| 538 | disconnect_req->host_addr, |
| 539 | disconnect_req->me_addr); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 540 | cl->state = MEI_FILE_DISCONNECTED; |
| 541 | cl->timer_count = 0; |
| 542 | if (cl == &dev->wd_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 543 | dev->wd_pending = false; |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 544 | else if (cl == &dev->iamthif_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 545 | dev->iamthif_timer = 0; |
| 546 | |
| 547 | /* prepare disconnect response */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 548 | mei_hbm_hdr(&dev->wr_ext_msg.hdr, len); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 549 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 550 | dev->wr_ext_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 551 | break; |
| 552 | } |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | |
| 557 | /** |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 558 | * mei_hbm_version_is_supported - checks whether the driver can |
| 559 | * support the hbm version of the device |
| 560 | * |
| 561 | * @dev: the device structure |
| 562 | * returns true if driver can support hbm version of the device |
| 563 | */ |
| 564 | bool mei_hbm_version_is_supported(struct mei_device *dev) |
| 565 | { |
| 566 | return (dev->version.major_version < HBM_MAJOR_VERSION) || |
| 567 | (dev->version.major_version == HBM_MAJOR_VERSION && |
| 568 | dev->version.minor_version <= HBM_MINOR_VERSION); |
| 569 | } |
| 570 | |
| 571 | /** |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 572 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 573 | * handle the read bus message cmd processing. |
| 574 | * |
| 575 | * @dev: the device structure |
| 576 | * @mei_hdr: header of bus message |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 577 | * |
| 578 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 579 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 580 | int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 581 | { |
| 582 | struct mei_bus_message *mei_msg; |
| 583 | struct mei_me_client *me_client; |
| 584 | struct hbm_host_version_response *version_res; |
| 585 | struct hbm_client_connect_response *connect_res; |
| 586 | struct hbm_client_connect_response *disconnect_res; |
| 587 | struct hbm_client_connect_request *disconnect_req; |
| 588 | struct hbm_flow_control *flow_control; |
| 589 | struct hbm_props_response *props_res; |
| 590 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 591 | |
| 592 | /* read the message to our buffer */ |
| 593 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 594 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 595 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
| 596 | |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 597 | /* ignore spurious message and prevent reset nesting |
| 598 | * hbm is put to idle during system reset |
| 599 | */ |
| 600 | if (dev->hbm_state == MEI_HBM_IDLE) { |
| 601 | dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n"); |
| 602 | return 0; |
| 603 | } |
| 604 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 605 | switch (mei_msg->hbm_cmd) { |
| 606 | case HOST_START_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 607 | dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n"); |
| 608 | |
| 609 | dev->init_clients_timer = 0; |
| 610 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 611 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 612 | |
| 613 | dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
| 614 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
| 615 | version_res->me_max_version.major_version, |
| 616 | version_res->me_max_version.minor_version); |
| 617 | |
| 618 | if (version_res->host_version_supported) { |
| 619 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 620 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 621 | } else { |
| 622 | dev->version.major_version = |
| 623 | version_res->me_max_version.major_version; |
| 624 | dev->version.minor_version = |
| 625 | version_res->me_max_version.minor_version; |
| 626 | } |
| 627 | |
| 628 | if (!mei_hbm_version_is_supported(dev)) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 629 | dev_warn(&dev->pdev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 630 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 631 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 632 | mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr, |
| 633 | dev->wr_msg.data); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 634 | if (mei_write_message(dev, &dev->wr_msg.hdr, |
| 635 | dev->wr_msg.data)) { |
| 636 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
| 637 | return -EIO; |
| 638 | } |
| 639 | break; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 640 | } |
| 641 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 642 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 643 | dev->hbm_state != MEI_HBM_START) { |
| 644 | dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
| 645 | dev->dev_state, dev->hbm_state); |
| 646 | return -EPROTO; |
| 647 | } |
| 648 | |
| 649 | dev->hbm_state = MEI_HBM_STARTED; |
| 650 | |
| 651 | if (mei_hbm_enum_clients_req(dev)) { |
| 652 | dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n"); |
| 653 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 654 | } |
| 655 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 656 | wake_up_interruptible(&dev->wait_recvd_msg); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 657 | break; |
| 658 | |
| 659 | case CLIENT_CONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 660 | dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n"); |
| 661 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 662 | connect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 663 | mei_hbm_cl_connect_res(dev, connect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 664 | wake_up(&dev->wait_recvd_msg); |
| 665 | break; |
| 666 | |
| 667 | case CLIENT_DISCONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 668 | dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n"); |
| 669 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 670 | disconnect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 671 | mei_hbm_cl_disconnect_res(dev, disconnect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 672 | wake_up(&dev->wait_recvd_msg); |
| 673 | break; |
| 674 | |
| 675 | case MEI_FLOW_CONTROL_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 676 | dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n"); |
| 677 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 678 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 679 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 680 | break; |
| 681 | |
| 682 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 683 | dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n"); |
| 684 | |
| 685 | dev->init_clients_timer = 0; |
| 686 | |
| 687 | if (dev->me_clients == NULL) { |
| 688 | dev_err(&dev->pdev->dev, "hbm: properties response: mei_clients not allocated\n"); |
| 689 | return -EPROTO; |
| 690 | } |
| 691 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 692 | props_res = (struct hbm_props_response *)mei_msg; |
| 693 | me_client = &dev->me_clients[dev->me_client_presentation_num]; |
| 694 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 695 | if (props_res->status) { |
| 696 | dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n", |
| 697 | props_res->status); |
| 698 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | if (me_client->client_id != props_res->address) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 702 | dev_err(&dev->pdev->dev, "hbm: properties response: address mismatch %d ?= %d\n", |
| 703 | me_client->client_id, props_res->address); |
| 704 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 708 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 709 | dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
| 710 | dev->dev_state, dev->hbm_state); |
| 711 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | me_client->props = props_res->client_properties; |
| 715 | dev->me_client_index++; |
| 716 | dev->me_client_presentation_num++; |
| 717 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 718 | /* request property for the next client */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 719 | if (mei_hbm_prop_req(dev)) |
| 720 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 721 | |
| 722 | break; |
| 723 | |
| 724 | case HOST_ENUM_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 725 | dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n"); |
| 726 | |
| 727 | dev->init_clients_timer = 0; |
| 728 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 729 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
Tomas Winkler | 23f5a32 | 2013-09-02 03:11:01 +0300 | [diff] [blame] | 730 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
| 731 | < sizeof(enum_res->valid_addresses)); |
| 732 | memcpy(dev->me_clients_map, enum_res->valid_addresses, |
| 733 | sizeof(enum_res->valid_addresses)); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 734 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 735 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 736 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { |
| 737 | dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
| 738 | dev->dev_state, dev->hbm_state); |
| 739 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 740 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 741 | |
| 742 | if (mei_hbm_me_cl_allocate(dev)) { |
| 743 | dev_err(&dev->pdev->dev, "hbm: enumeration response: cannot allocate clients array\n"); |
| 744 | return -ENOMEM; |
| 745 | } |
| 746 | |
| 747 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
| 748 | |
| 749 | /* first property request */ |
| 750 | if (mei_hbm_prop_req(dev)) |
| 751 | return -EIO; |
| 752 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 753 | break; |
| 754 | |
| 755 | case HOST_STOP_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 756 | dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n"); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 757 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 758 | dev->init_clients_timer = 0; |
| 759 | |
| 760 | if (dev->hbm_state != MEI_HBM_STOPPED) { |
| 761 | dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
| 762 | dev->dev_state, dev->hbm_state); |
| 763 | return -EPROTO; |
| 764 | } |
| 765 | |
Tomas Winkler | 33ec082 | 2014-01-12 00:36:09 +0200 | [diff] [blame] | 766 | dev->dev_state = MEI_DEV_POWER_DOWN; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 767 | dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n"); |
| 768 | /* force the reset */ |
| 769 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 770 | break; |
| 771 | |
| 772 | case CLIENT_DISCONNECT_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 773 | dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n"); |
| 774 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 775 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 776 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 777 | break; |
| 778 | |
| 779 | case ME_STOP_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 780 | dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n"); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 781 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 782 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 783 | mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr, |
| 784 | dev->wr_ext_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 785 | break; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 786 | default: |
| 787 | BUG(); |
| 788 | break; |
| 789 | |
| 790 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 791 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 792 | } |
| 793 | |