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" |
| 23 | #include "interface.h" |
| 24 | |
| 25 | /** |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 26 | * mei_hbm_cl_hdr - construct client hbm header |
| 27 | * @cl: - client |
| 28 | * @hbm_cmd: host bus message command |
| 29 | * @buf: buffer for cl header |
| 30 | * @len: buffer length |
| 31 | */ |
| 32 | static inline |
| 33 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) |
| 34 | { |
| 35 | struct mei_hbm_cl_cmd *cmd = buf; |
| 36 | |
| 37 | memset(cmd, 0, len); |
| 38 | |
| 39 | cmd->hbm_cmd = hbm_cmd; |
| 40 | cmd->host_addr = cl->host_client_id; |
| 41 | cmd->me_addr = cl->me_client_id; |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * same_disconn_addr - tells if they have the same address |
| 46 | * |
| 47 | * @file: private data of the file object. |
| 48 | * @disconn: disconnection request. |
| 49 | * |
| 50 | * returns true if addres are same |
| 51 | */ |
| 52 | static inline |
| 53 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) |
| 54 | { |
| 55 | struct mei_hbm_cl_cmd *cmd = buf; |
| 56 | return cl->host_client_id == cmd->host_addr && |
| 57 | cl->me_client_id == cmd->me_addr; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame^] | 62 | * is_treat_specially_client - checks if the message belongs |
| 63 | * to the file private data. |
| 64 | * |
| 65 | * @cl: private data of the file object |
| 66 | * @rs: connect response bus message |
| 67 | * |
| 68 | */ |
| 69 | static bool is_treat_specially_client(struct mei_cl *cl, |
| 70 | struct hbm_client_connect_response *rs) |
| 71 | { |
| 72 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 73 | if (!rs->status) { |
| 74 | cl->state = MEI_FILE_CONNECTED; |
| 75 | cl->status = 0; |
| 76 | |
| 77 | } else { |
| 78 | cl->state = MEI_FILE_DISCONNECTED; |
| 79 | cl->status = -ENODEV; |
| 80 | } |
| 81 | cl->timer_count = 0; |
| 82 | |
| 83 | return true; |
| 84 | } |
| 85 | return false; |
| 86 | } |
| 87 | |
| 88 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 89 | * mei_hbm_start_req - sends start request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 90 | * |
| 91 | * @dev: the device structure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 92 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 93 | void mei_hbm_start_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 94 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 95 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 96 | struct hbm_host_version_request *start_req; |
| 97 | const size_t len = sizeof(struct hbm_host_version_request); |
| 98 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 99 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 100 | |
| 101 | /* host start message */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 102 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 103 | memset(start_req, 0, len); |
| 104 | start_req->hbm_cmd = HOST_START_REQ_CMD; |
| 105 | start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 106 | start_req->host_version.minor_version = HBM_MINOR_VERSION; |
| 107 | |
| 108 | dev->recvd_msg = false; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 109 | if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 110 | dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); |
| 111 | dev->dev_state = MEI_DEV_RESETING; |
| 112 | mei_reset(dev, 1); |
| 113 | } |
| 114 | dev->init_clients_state = MEI_START_MESSAGE; |
| 115 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 116 | return ; |
| 117 | } |
| 118 | |
| 119 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 120 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 121 | * |
| 122 | * @dev: the device structure |
| 123 | * |
| 124 | * returns none. |
| 125 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 126 | static void mei_hbm_enum_clients_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 127 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 128 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 129 | struct hbm_host_enum_request *enum_req; |
| 130 | const size_t len = sizeof(struct hbm_host_enum_request); |
| 131 | /* enumerate clients */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 132 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 133 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 134 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
| 135 | memset(enum_req, 0, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 136 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
| 137 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 138 | if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 139 | dev->dev_state = MEI_DEV_RESETING; |
| 140 | dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); |
| 141 | mei_reset(dev, 1); |
| 142 | } |
| 143 | dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE; |
| 144 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 145 | return; |
| 146 | } |
| 147 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 148 | /** |
| 149 | * mei_hbm_prop_requsest - request property for a single client |
| 150 | * |
| 151 | * @dev: the device structure |
| 152 | * |
| 153 | * returns none. |
| 154 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 155 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 156 | static int mei_hbm_prop_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 157 | { |
| 158 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 159 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 160 | struct hbm_props_request *prop_req; |
| 161 | const size_t len = sizeof(struct hbm_props_request); |
| 162 | unsigned long next_client_index; |
| 163 | u8 client_num; |
| 164 | |
| 165 | |
| 166 | client_num = dev->me_client_presentation_num; |
| 167 | |
| 168 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
| 169 | dev->me_client_index); |
| 170 | |
| 171 | /* We got all client properties */ |
| 172 | if (next_client_index == MEI_CLIENTS_MAX) { |
| 173 | schedule_work(&dev->init_work); |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | dev->me_clients[client_num].client_id = next_client_index; |
| 179 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; |
| 180 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 181 | mei_hbm_hdr(mei_hdr, len); |
| 182 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 183 | |
| 184 | memset(prop_req, 0, sizeof(struct hbm_props_request)); |
| 185 | |
| 186 | |
| 187 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
| 188 | prop_req->address = next_client_index; |
| 189 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 190 | if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 191 | dev->dev_state = MEI_DEV_RESETING; |
| 192 | dev_err(&dev->pdev->dev, "Properties request command failed\n"); |
| 193 | mei_reset(dev, 1); |
| 194 | |
| 195 | return -EIO; |
| 196 | } |
| 197 | |
| 198 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 199 | dev->me_client_index = next_client_index; |
| 200 | |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | /** |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 205 | * mei_hbm_stop_req_prepare - perpare stop request message |
| 206 | * |
| 207 | * @dev - mei device |
| 208 | * @mei_hdr - mei message header |
| 209 | * @data - hbm message body buffer |
| 210 | */ |
| 211 | static void mei_hbm_stop_req_prepare(struct mei_device *dev, |
| 212 | struct mei_msg_hdr *mei_hdr, unsigned char *data) |
| 213 | { |
| 214 | struct hbm_host_stop_request *req = |
| 215 | (struct hbm_host_stop_request *)data; |
| 216 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 217 | |
| 218 | mei_hbm_hdr(mei_hdr, len); |
| 219 | |
| 220 | memset(req, 0, len); |
| 221 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 222 | req->reason = DRIVER_STOP_REQUEST; |
| 223 | } |
| 224 | |
| 225 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 226 | * mei_hbm_cl_flow_control_req - sends flow control requst. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 227 | * |
| 228 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 229 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 230 | * |
| 231 | * This function returns -EIO on write failure |
| 232 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 233 | 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] | 234 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 235 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 236 | const size_t len = sizeof(struct hbm_flow_control); |
| 237 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 238 | mei_hbm_hdr(mei_hdr, len); |
| 239 | 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] | 240 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 241 | dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n", |
| 242 | cl->host_client_id, cl->me_client_id); |
| 243 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 244 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame^] | 248 | * add_single_flow_creds - adds single buffer credentials. |
| 249 | * |
| 250 | * @file: private data ot the file object. |
| 251 | * @flow: flow control. |
| 252 | */ |
| 253 | static void mei_hbm_add_single_flow_creds(struct mei_device *dev, |
| 254 | struct hbm_flow_control *flow) |
| 255 | { |
| 256 | struct mei_me_client *client; |
| 257 | int i; |
| 258 | |
| 259 | for (i = 0; i < dev->me_clients_num; i++) { |
| 260 | client = &dev->me_clients[i]; |
| 261 | if (client && flow->me_addr == client->client_id) { |
| 262 | if (client->props.single_recv_buf) { |
| 263 | client->mei_flow_ctrl_creds++; |
| 264 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", |
| 265 | flow->me_addr); |
| 266 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", |
| 267 | client->mei_flow_ctrl_creds); |
| 268 | } else { |
| 269 | BUG(); /* error in flow control */ |
| 270 | } |
| 271 | } |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 277 | * |
| 278 | * @dev: the device structure |
| 279 | * @flow_control: flow control response bus message |
| 280 | */ |
| 281 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
| 282 | struct hbm_flow_control *flow_control) |
| 283 | { |
| 284 | struct mei_cl *cl = NULL; |
| 285 | struct mei_cl *next = NULL; |
| 286 | |
| 287 | if (!flow_control->host_addr) { |
| 288 | /* single receive buffer */ |
| 289 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | /* normal connection */ |
| 294 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 295 | if (mei_hbm_cl_addr_equal(cl, flow_control)) { |
| 296 | cl->mei_flow_ctrl_creds++; |
| 297 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", |
| 298 | flow_control->host_addr, flow_control->me_addr); |
| 299 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", |
| 300 | cl->mei_flow_ctrl_creds); |
| 301 | break; |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | |
| 307 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 308 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 309 | * |
| 310 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 311 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 312 | * |
| 313 | * This function returns -EIO on write failure |
| 314 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 315 | 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] | 316 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 317 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 318 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 319 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 320 | mei_hbm_hdr(mei_hdr, len); |
| 321 | 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] | 322 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 323 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame^] | 327 | * mei_hbm_cl_disconnect_res - disconnect response from ME |
| 328 | * |
| 329 | * @dev: the device structure |
| 330 | * @rs: disconnect response bus message |
| 331 | */ |
| 332 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, |
| 333 | struct hbm_client_connect_response *rs) |
| 334 | { |
| 335 | struct mei_cl *cl; |
| 336 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 337 | |
| 338 | dev_dbg(&dev->pdev->dev, |
| 339 | "disconnect_response:\n" |
| 340 | "ME Client = %d\n" |
| 341 | "Host Client = %d\n" |
| 342 | "Status = %d\n", |
| 343 | rs->me_addr, |
| 344 | rs->host_addr, |
| 345 | rs->status); |
| 346 | |
| 347 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 348 | cl = pos->cl; |
| 349 | |
| 350 | if (!cl) { |
| 351 | list_del(&pos->list); |
| 352 | return; |
| 353 | } |
| 354 | |
| 355 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); |
| 356 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 357 | list_del(&pos->list); |
| 358 | if (!rs->status) |
| 359 | cl->state = MEI_FILE_DISCONNECTED; |
| 360 | |
| 361 | cl->status = 0; |
| 362 | cl->timer_count = 0; |
| 363 | break; |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 369 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 370 | * |
| 371 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 372 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 373 | * |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 374 | * returns -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 375 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 376 | 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] | 377 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 378 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 379 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 380 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 381 | mei_hbm_hdr(mei_hdr, len); |
| 382 | 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] | 383 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 384 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame^] | 388 | * mei_hbm_cl_connect_res - connect resposne from the ME |
| 389 | * |
| 390 | * @dev: the device structure |
| 391 | * @rs: connect response bus message |
| 392 | */ |
| 393 | static void mei_hbm_cl_connect_res(struct mei_device *dev, |
| 394 | struct hbm_client_connect_response *rs) |
| 395 | { |
| 396 | |
| 397 | struct mei_cl *cl; |
| 398 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 399 | |
| 400 | dev_dbg(&dev->pdev->dev, |
| 401 | "connect_response:\n" |
| 402 | "ME Client = %d\n" |
| 403 | "Host Client = %d\n" |
| 404 | "Status = %d\n", |
| 405 | rs->me_addr, |
| 406 | rs->host_addr, |
| 407 | rs->status); |
| 408 | |
| 409 | /* if WD or iamthif client treat specially */ |
| 410 | |
| 411 | if (is_treat_specially_client(&dev->wd_cl, rs)) { |
| 412 | dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); |
| 413 | mei_watchdog_register(dev); |
| 414 | |
| 415 | return; |
| 416 | } |
| 417 | |
| 418 | if (is_treat_specially_client(&dev->iamthif_cl, rs)) { |
| 419 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
| 420 | return; |
| 421 | } |
| 422 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 423 | |
| 424 | cl = pos->cl; |
| 425 | if (!cl) { |
| 426 | list_del(&pos->list); |
| 427 | return; |
| 428 | } |
| 429 | if (pos->fop_type == MEI_FOP_IOCTL) { |
| 430 | if (is_treat_specially_client(cl, rs)) { |
| 431 | list_del(&pos->list); |
| 432 | cl->status = 0; |
| 433 | cl->timer_count = 0; |
| 434 | break; |
| 435 | } |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | |
| 441 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 442 | * mei_client_disconnect_request - disconnect request initiated by me |
| 443 | * host sends disoconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 444 | * |
| 445 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 446 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 447 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 448 | static void mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 449 | struct hbm_client_connect_request *disconnect_req) |
| 450 | { |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 451 | struct mei_cl *cl, *next; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 452 | const size_t len = sizeof(struct hbm_client_connect_response); |
| 453 | |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 454 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 455 | if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 456 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", |
| 457 | disconnect_req->host_addr, |
| 458 | disconnect_req->me_addr); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 459 | cl->state = MEI_FILE_DISCONNECTED; |
| 460 | cl->timer_count = 0; |
| 461 | if (cl == &dev->wd_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 462 | dev->wd_pending = false; |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 463 | else if (cl == &dev->iamthif_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 464 | dev->iamthif_timer = 0; |
| 465 | |
| 466 | /* prepare disconnect response */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 467 | mei_hbm_hdr(&dev->wr_ext_msg.hdr, len); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 468 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 469 | dev->wr_ext_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 470 | break; |
| 471 | } |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | |
| 476 | /** |
| 477 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 478 | * handle the read bus message cmd processing. |
| 479 | * |
| 480 | * @dev: the device structure |
| 481 | * @mei_hdr: header of bus message |
| 482 | */ |
| 483 | void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
| 484 | { |
| 485 | struct mei_bus_message *mei_msg; |
| 486 | struct mei_me_client *me_client; |
| 487 | struct hbm_host_version_response *version_res; |
| 488 | struct hbm_client_connect_response *connect_res; |
| 489 | struct hbm_client_connect_response *disconnect_res; |
| 490 | struct hbm_client_connect_request *disconnect_req; |
| 491 | struct hbm_flow_control *flow_control; |
| 492 | struct hbm_props_response *props_res; |
| 493 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 494 | |
| 495 | /* read the message to our buffer */ |
| 496 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 497 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 498 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
| 499 | |
| 500 | switch (mei_msg->hbm_cmd) { |
| 501 | case HOST_START_RES_CMD: |
| 502 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 503 | if (!version_res->host_version_supported) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 504 | dev->version = version_res->me_max_version; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 505 | dev_dbg(&dev->pdev->dev, "version mismatch.\n"); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 506 | |
| 507 | mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr, |
| 508 | dev->wr_msg.data); |
| 509 | mei_write_message(dev, &dev->wr_msg.hdr, |
| 510 | dev->wr_msg.data); |
| 511 | return; |
| 512 | } |
| 513 | |
| 514 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 515 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 516 | if (dev->dev_state == MEI_DEV_INIT_CLIENTS && |
| 517 | dev->init_clients_state == MEI_START_MESSAGE) { |
| 518 | dev->init_clients_timer = 0; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 519 | mei_hbm_enum_clients_req(dev); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 520 | } else { |
| 521 | dev->recvd_msg = false; |
| 522 | dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n"); |
| 523 | mei_reset(dev, 1); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 524 | return; |
| 525 | } |
| 526 | |
| 527 | dev->recvd_msg = true; |
| 528 | dev_dbg(&dev->pdev->dev, "host start response message received.\n"); |
| 529 | break; |
| 530 | |
| 531 | case CLIENT_CONNECT_RES_CMD: |
| 532 | connect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame^] | 533 | mei_hbm_cl_connect_res(dev, connect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 534 | dev_dbg(&dev->pdev->dev, "client connect response message received.\n"); |
| 535 | wake_up(&dev->wait_recvd_msg); |
| 536 | break; |
| 537 | |
| 538 | case CLIENT_DISCONNECT_RES_CMD: |
| 539 | disconnect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame^] | 540 | mei_hbm_cl_disconnect_res(dev, disconnect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 541 | dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n"); |
| 542 | wake_up(&dev->wait_recvd_msg); |
| 543 | break; |
| 544 | |
| 545 | case MEI_FLOW_CONTROL_CMD: |
| 546 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame^] | 547 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 548 | dev_dbg(&dev->pdev->dev, "client flow control response message received.\n"); |
| 549 | break; |
| 550 | |
| 551 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
| 552 | props_res = (struct hbm_props_response *)mei_msg; |
| 553 | me_client = &dev->me_clients[dev->me_client_presentation_num]; |
| 554 | |
| 555 | if (props_res->status || !dev->me_clients) { |
| 556 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n"); |
| 557 | mei_reset(dev, 1); |
| 558 | return; |
| 559 | } |
| 560 | |
| 561 | if (me_client->client_id != props_res->address) { |
| 562 | dev_err(&dev->pdev->dev, |
| 563 | "Host client properties reply mismatch\n"); |
| 564 | mei_reset(dev, 1); |
| 565 | |
| 566 | return; |
| 567 | } |
| 568 | |
| 569 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 570 | dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) { |
| 571 | dev_err(&dev->pdev->dev, |
| 572 | "Unexpected client properties reply\n"); |
| 573 | mei_reset(dev, 1); |
| 574 | |
| 575 | return; |
| 576 | } |
| 577 | |
| 578 | me_client->props = props_res->client_properties; |
| 579 | dev->me_client_index++; |
| 580 | dev->me_client_presentation_num++; |
| 581 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 582 | /* request property for the next client */ |
| 583 | mei_hbm_prop_req(dev); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 584 | |
| 585 | break; |
| 586 | |
| 587 | case HOST_ENUM_RES_CMD: |
| 588 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
| 589 | memcpy(dev->me_clients_map, enum_res->valid_addresses, 32); |
| 590 | if (dev->dev_state == MEI_DEV_INIT_CLIENTS && |
| 591 | dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) { |
| 592 | dev->init_clients_timer = 0; |
| 593 | dev->me_client_presentation_num = 0; |
| 594 | dev->me_client_index = 0; |
| 595 | mei_allocate_me_clients_storage(dev); |
| 596 | dev->init_clients_state = |
| 597 | MEI_CLIENT_PROPERTIES_MESSAGE; |
| 598 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 599 | /* first property reqeust */ |
| 600 | mei_hbm_prop_req(dev); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 601 | } else { |
| 602 | dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n"); |
| 603 | mei_reset(dev, 1); |
| 604 | return; |
| 605 | } |
| 606 | break; |
| 607 | |
| 608 | case HOST_STOP_RES_CMD: |
| 609 | dev->dev_state = MEI_DEV_DISABLED; |
| 610 | dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n"); |
| 611 | mei_reset(dev, 1); |
| 612 | break; |
| 613 | |
| 614 | case CLIENT_DISCONNECT_REQ_CMD: |
| 615 | /* search for client */ |
| 616 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 617 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 618 | break; |
| 619 | |
| 620 | case ME_STOP_REQ_CMD: |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 621 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 622 | mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr, |
| 623 | dev->wr_ext_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 624 | break; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 625 | default: |
| 626 | BUG(); |
| 627 | break; |
| 628 | |
| 629 | } |
| 630 | } |
| 631 | |