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 | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 24 | #include "interface.h" |
| 25 | |
| 26 | /** |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 27 | * mei_hbm_cl_hdr - construct client hbm header |
| 28 | * @cl: - client |
| 29 | * @hbm_cmd: host bus message command |
| 30 | * @buf: buffer for cl header |
| 31 | * @len: buffer length |
| 32 | */ |
| 33 | static inline |
| 34 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) |
| 35 | { |
| 36 | struct mei_hbm_cl_cmd *cmd = buf; |
| 37 | |
| 38 | memset(cmd, 0, len); |
| 39 | |
| 40 | cmd->hbm_cmd = hbm_cmd; |
| 41 | cmd->host_addr = cl->host_client_id; |
| 42 | cmd->me_addr = cl->me_client_id; |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * same_disconn_addr - tells if they have the same address |
| 47 | * |
| 48 | * @file: private data of the file object. |
| 49 | * @disconn: disconnection request. |
| 50 | * |
| 51 | * returns true if addres are same |
| 52 | */ |
| 53 | static inline |
| 54 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) |
| 55 | { |
| 56 | struct mei_hbm_cl_cmd *cmd = buf; |
| 57 | return cl->host_client_id == cmd->host_addr && |
| 58 | cl->me_client_id == cmd->me_addr; |
| 59 | } |
| 60 | |
| 61 | |
| 62 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 63 | * is_treat_specially_client - checks if the message belongs |
| 64 | * to the file private data. |
| 65 | * |
| 66 | * @cl: private data of the file object |
| 67 | * @rs: connect response bus message |
| 68 | * |
| 69 | */ |
| 70 | static bool is_treat_specially_client(struct mei_cl *cl, |
| 71 | struct hbm_client_connect_response *rs) |
| 72 | { |
| 73 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 74 | if (!rs->status) { |
| 75 | cl->state = MEI_FILE_CONNECTED; |
| 76 | cl->status = 0; |
| 77 | |
| 78 | } else { |
| 79 | cl->state = MEI_FILE_DISCONNECTED; |
| 80 | cl->status = -ENODEV; |
| 81 | } |
| 82 | cl->timer_count = 0; |
| 83 | |
| 84 | return true; |
| 85 | } |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 90 | * mei_hbm_start_req - sends start request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 91 | * |
| 92 | * @dev: the device structure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 93 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 94 | void mei_hbm_start_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 95 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 96 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 97 | struct hbm_host_version_request *start_req; |
| 98 | const size_t len = sizeof(struct hbm_host_version_request); |
| 99 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 100 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 101 | |
| 102 | /* host start message */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 103 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 104 | memset(start_req, 0, len); |
| 105 | start_req->hbm_cmd = HOST_START_REQ_CMD; |
| 106 | start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 107 | start_req->host_version.minor_version = HBM_MINOR_VERSION; |
| 108 | |
| 109 | dev->recvd_msg = false; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 110 | if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 111 | dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); |
| 112 | dev->dev_state = MEI_DEV_RESETING; |
| 113 | mei_reset(dev, 1); |
| 114 | } |
| 115 | dev->init_clients_state = MEI_START_MESSAGE; |
| 116 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 117 | return ; |
| 118 | } |
| 119 | |
| 120 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 121 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 122 | * |
| 123 | * @dev: the device structure |
| 124 | * |
| 125 | * returns none. |
| 126 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 127 | static void mei_hbm_enum_clients_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 128 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 129 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 130 | struct hbm_host_enum_request *enum_req; |
| 131 | const size_t len = sizeof(struct hbm_host_enum_request); |
| 132 | /* enumerate clients */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 133 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 134 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 135 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
| 136 | memset(enum_req, 0, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 137 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
| 138 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 139 | if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 140 | dev->dev_state = MEI_DEV_RESETING; |
| 141 | dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); |
| 142 | mei_reset(dev, 1); |
| 143 | } |
| 144 | dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE; |
| 145 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 146 | return; |
| 147 | } |
| 148 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 149 | /** |
| 150 | * mei_hbm_prop_requsest - request property for a single client |
| 151 | * |
| 152 | * @dev: the device structure |
| 153 | * |
| 154 | * returns none. |
| 155 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 156 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 157 | static int mei_hbm_prop_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 158 | { |
| 159 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 160 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 161 | struct hbm_props_request *prop_req; |
| 162 | const size_t len = sizeof(struct hbm_props_request); |
| 163 | unsigned long next_client_index; |
| 164 | u8 client_num; |
| 165 | |
| 166 | |
| 167 | client_num = dev->me_client_presentation_num; |
| 168 | |
| 169 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
| 170 | dev->me_client_index); |
| 171 | |
| 172 | /* We got all client properties */ |
| 173 | if (next_client_index == MEI_CLIENTS_MAX) { |
| 174 | schedule_work(&dev->init_work); |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | dev->me_clients[client_num].client_id = next_client_index; |
| 180 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; |
| 181 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 182 | mei_hbm_hdr(mei_hdr, len); |
| 183 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 184 | |
| 185 | memset(prop_req, 0, sizeof(struct hbm_props_request)); |
| 186 | |
| 187 | |
| 188 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
| 189 | prop_req->address = next_client_index; |
| 190 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 191 | if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 192 | dev->dev_state = MEI_DEV_RESETING; |
| 193 | dev_err(&dev->pdev->dev, "Properties request command failed\n"); |
| 194 | mei_reset(dev, 1); |
| 195 | |
| 196 | return -EIO; |
| 197 | } |
| 198 | |
| 199 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 200 | dev->me_client_index = next_client_index; |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /** |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 206 | * mei_hbm_stop_req_prepare - perpare stop request message |
| 207 | * |
| 208 | * @dev - mei device |
| 209 | * @mei_hdr - mei message header |
| 210 | * @data - hbm message body buffer |
| 211 | */ |
| 212 | static void mei_hbm_stop_req_prepare(struct mei_device *dev, |
| 213 | struct mei_msg_hdr *mei_hdr, unsigned char *data) |
| 214 | { |
| 215 | struct hbm_host_stop_request *req = |
| 216 | (struct hbm_host_stop_request *)data; |
| 217 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 218 | |
| 219 | mei_hbm_hdr(mei_hdr, len); |
| 220 | |
| 221 | memset(req, 0, len); |
| 222 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 223 | req->reason = DRIVER_STOP_REQUEST; |
| 224 | } |
| 225 | |
| 226 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 227 | * mei_hbm_cl_flow_control_req - sends flow control requst. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 228 | * |
| 229 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 230 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 231 | * |
| 232 | * This function returns -EIO on write failure |
| 233 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 234 | 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] | 235 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 236 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 237 | const size_t len = sizeof(struct hbm_flow_control); |
| 238 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 239 | mei_hbm_hdr(mei_hdr, len); |
| 240 | 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] | 241 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 242 | dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n", |
| 243 | cl->host_client_id, cl->me_client_id); |
| 244 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 245 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 249 | * add_single_flow_creds - adds single buffer credentials. |
| 250 | * |
| 251 | * @file: private data ot the file object. |
| 252 | * @flow: flow control. |
| 253 | */ |
| 254 | static void mei_hbm_add_single_flow_creds(struct mei_device *dev, |
| 255 | struct hbm_flow_control *flow) |
| 256 | { |
| 257 | struct mei_me_client *client; |
| 258 | int i; |
| 259 | |
| 260 | for (i = 0; i < dev->me_clients_num; i++) { |
| 261 | client = &dev->me_clients[i]; |
| 262 | if (client && flow->me_addr == client->client_id) { |
| 263 | if (client->props.single_recv_buf) { |
| 264 | client->mei_flow_ctrl_creds++; |
| 265 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", |
| 266 | flow->me_addr); |
| 267 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", |
| 268 | client->mei_flow_ctrl_creds); |
| 269 | } else { |
| 270 | BUG(); /* error in flow control */ |
| 271 | } |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 278 | * |
| 279 | * @dev: the device structure |
| 280 | * @flow_control: flow control response bus message |
| 281 | */ |
| 282 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
| 283 | struct hbm_flow_control *flow_control) |
| 284 | { |
| 285 | struct mei_cl *cl = NULL; |
| 286 | struct mei_cl *next = NULL; |
| 287 | |
| 288 | if (!flow_control->host_addr) { |
| 289 | /* single receive buffer */ |
| 290 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 291 | return; |
| 292 | } |
| 293 | |
| 294 | /* normal connection */ |
| 295 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 296 | if (mei_hbm_cl_addr_equal(cl, flow_control)) { |
| 297 | cl->mei_flow_ctrl_creds++; |
| 298 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", |
| 299 | flow_control->host_addr, flow_control->me_addr); |
| 300 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", |
| 301 | cl->mei_flow_ctrl_creds); |
| 302 | break; |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | |
| 308 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 309 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 310 | * |
| 311 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 312 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 313 | * |
| 314 | * This function returns -EIO on write failure |
| 315 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 316 | 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] | 317 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 318 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 319 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 320 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 321 | mei_hbm_hdr(mei_hdr, len); |
| 322 | 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] | 323 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 324 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 328 | * mei_hbm_cl_disconnect_res - disconnect response from ME |
| 329 | * |
| 330 | * @dev: the device structure |
| 331 | * @rs: disconnect response bus message |
| 332 | */ |
| 333 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, |
| 334 | struct hbm_client_connect_response *rs) |
| 335 | { |
| 336 | struct mei_cl *cl; |
| 337 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 338 | |
| 339 | dev_dbg(&dev->pdev->dev, |
| 340 | "disconnect_response:\n" |
| 341 | "ME Client = %d\n" |
| 342 | "Host Client = %d\n" |
| 343 | "Status = %d\n", |
| 344 | rs->me_addr, |
| 345 | rs->host_addr, |
| 346 | rs->status); |
| 347 | |
| 348 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 349 | cl = pos->cl; |
| 350 | |
| 351 | if (!cl) { |
| 352 | list_del(&pos->list); |
| 353 | return; |
| 354 | } |
| 355 | |
| 356 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); |
| 357 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 358 | list_del(&pos->list); |
| 359 | if (!rs->status) |
| 360 | cl->state = MEI_FILE_DISCONNECTED; |
| 361 | |
| 362 | cl->status = 0; |
| 363 | cl->timer_count = 0; |
| 364 | break; |
| 365 | } |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 370 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 371 | * |
| 372 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 373 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 374 | * |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 375 | * returns -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 376 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 377 | 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] | 378 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 379 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 380 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 381 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 382 | mei_hbm_hdr(mei_hdr, len); |
| 383 | 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] | 384 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 385 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 389 | * mei_hbm_cl_connect_res - connect resposne from the ME |
| 390 | * |
| 391 | * @dev: the device structure |
| 392 | * @rs: connect response bus message |
| 393 | */ |
| 394 | static void mei_hbm_cl_connect_res(struct mei_device *dev, |
| 395 | struct hbm_client_connect_response *rs) |
| 396 | { |
| 397 | |
| 398 | struct mei_cl *cl; |
| 399 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 400 | |
| 401 | dev_dbg(&dev->pdev->dev, |
| 402 | "connect_response:\n" |
| 403 | "ME Client = %d\n" |
| 404 | "Host Client = %d\n" |
| 405 | "Status = %d\n", |
| 406 | rs->me_addr, |
| 407 | rs->host_addr, |
| 408 | rs->status); |
| 409 | |
| 410 | /* if WD or iamthif client treat specially */ |
| 411 | |
| 412 | if (is_treat_specially_client(&dev->wd_cl, rs)) { |
| 413 | dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); |
| 414 | mei_watchdog_register(dev); |
| 415 | |
| 416 | return; |
| 417 | } |
| 418 | |
| 419 | if (is_treat_specially_client(&dev->iamthif_cl, rs)) { |
| 420 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
| 421 | return; |
| 422 | } |
| 423 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 424 | |
| 425 | cl = pos->cl; |
| 426 | if (!cl) { |
| 427 | list_del(&pos->list); |
| 428 | return; |
| 429 | } |
| 430 | if (pos->fop_type == MEI_FOP_IOCTL) { |
| 431 | if (is_treat_specially_client(cl, rs)) { |
| 432 | list_del(&pos->list); |
| 433 | cl->status = 0; |
| 434 | cl->timer_count = 0; |
| 435 | break; |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | |
| 442 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 443 | * mei_client_disconnect_request - disconnect request initiated by me |
| 444 | * host sends disoconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 445 | * |
| 446 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 447 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 448 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 449 | static void mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 450 | struct hbm_client_connect_request *disconnect_req) |
| 451 | { |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 452 | struct mei_cl *cl, *next; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 453 | const size_t len = sizeof(struct hbm_client_connect_response); |
| 454 | |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 455 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 456 | if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 457 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", |
| 458 | disconnect_req->host_addr, |
| 459 | disconnect_req->me_addr); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 460 | cl->state = MEI_FILE_DISCONNECTED; |
| 461 | cl->timer_count = 0; |
| 462 | if (cl == &dev->wd_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 463 | dev->wd_pending = false; |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 464 | else if (cl == &dev->iamthif_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 465 | dev->iamthif_timer = 0; |
| 466 | |
| 467 | /* prepare disconnect response */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 468 | mei_hbm_hdr(&dev->wr_ext_msg.hdr, len); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 469 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 470 | dev->wr_ext_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 471 | break; |
| 472 | } |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | |
| 477 | /** |
| 478 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 479 | * handle the read bus message cmd processing. |
| 480 | * |
| 481 | * @dev: the device structure |
| 482 | * @mei_hdr: header of bus message |
| 483 | */ |
| 484 | void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
| 485 | { |
| 486 | struct mei_bus_message *mei_msg; |
| 487 | struct mei_me_client *me_client; |
| 488 | struct hbm_host_version_response *version_res; |
| 489 | struct hbm_client_connect_response *connect_res; |
| 490 | struct hbm_client_connect_response *disconnect_res; |
| 491 | struct hbm_client_connect_request *disconnect_req; |
| 492 | struct hbm_flow_control *flow_control; |
| 493 | struct hbm_props_response *props_res; |
| 494 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 495 | |
| 496 | /* read the message to our buffer */ |
| 497 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 498 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 499 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
| 500 | |
| 501 | switch (mei_msg->hbm_cmd) { |
| 502 | case HOST_START_RES_CMD: |
| 503 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 504 | if (!version_res->host_version_supported) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 505 | dev->version = version_res->me_max_version; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 506 | dev_dbg(&dev->pdev->dev, "version mismatch.\n"); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 507 | |
| 508 | mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr, |
| 509 | dev->wr_msg.data); |
| 510 | mei_write_message(dev, &dev->wr_msg.hdr, |
| 511 | dev->wr_msg.data); |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 516 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 517 | if (dev->dev_state == MEI_DEV_INIT_CLIENTS && |
| 518 | dev->init_clients_state == MEI_START_MESSAGE) { |
| 519 | dev->init_clients_timer = 0; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 520 | mei_hbm_enum_clients_req(dev); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 521 | } else { |
| 522 | dev->recvd_msg = false; |
| 523 | dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n"); |
| 524 | mei_reset(dev, 1); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 525 | return; |
| 526 | } |
| 527 | |
| 528 | dev->recvd_msg = true; |
| 529 | dev_dbg(&dev->pdev->dev, "host start response message received.\n"); |
| 530 | break; |
| 531 | |
| 532 | case CLIENT_CONNECT_RES_CMD: |
| 533 | connect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 534 | mei_hbm_cl_connect_res(dev, connect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 535 | dev_dbg(&dev->pdev->dev, "client connect response message received.\n"); |
| 536 | wake_up(&dev->wait_recvd_msg); |
| 537 | break; |
| 538 | |
| 539 | case CLIENT_DISCONNECT_RES_CMD: |
| 540 | disconnect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 541 | mei_hbm_cl_disconnect_res(dev, disconnect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 542 | dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n"); |
| 543 | wake_up(&dev->wait_recvd_msg); |
| 544 | break; |
| 545 | |
| 546 | case MEI_FLOW_CONTROL_CMD: |
| 547 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 548 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 549 | dev_dbg(&dev->pdev->dev, "client flow control response message received.\n"); |
| 550 | break; |
| 551 | |
| 552 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
| 553 | props_res = (struct hbm_props_response *)mei_msg; |
| 554 | me_client = &dev->me_clients[dev->me_client_presentation_num]; |
| 555 | |
| 556 | if (props_res->status || !dev->me_clients) { |
| 557 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n"); |
| 558 | mei_reset(dev, 1); |
| 559 | return; |
| 560 | } |
| 561 | |
| 562 | if (me_client->client_id != props_res->address) { |
| 563 | dev_err(&dev->pdev->dev, |
| 564 | "Host client properties reply mismatch\n"); |
| 565 | mei_reset(dev, 1); |
| 566 | |
| 567 | return; |
| 568 | } |
| 569 | |
| 570 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 571 | dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) { |
| 572 | dev_err(&dev->pdev->dev, |
| 573 | "Unexpected client properties reply\n"); |
| 574 | mei_reset(dev, 1); |
| 575 | |
| 576 | return; |
| 577 | } |
| 578 | |
| 579 | me_client->props = props_res->client_properties; |
| 580 | dev->me_client_index++; |
| 581 | dev->me_client_presentation_num++; |
| 582 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 583 | /* request property for the next client */ |
| 584 | mei_hbm_prop_req(dev); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 585 | |
| 586 | break; |
| 587 | |
| 588 | case HOST_ENUM_RES_CMD: |
| 589 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
| 590 | memcpy(dev->me_clients_map, enum_res->valid_addresses, 32); |
| 591 | if (dev->dev_state == MEI_DEV_INIT_CLIENTS && |
| 592 | dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) { |
| 593 | dev->init_clients_timer = 0; |
| 594 | dev->me_client_presentation_num = 0; |
| 595 | dev->me_client_index = 0; |
| 596 | mei_allocate_me_clients_storage(dev); |
| 597 | dev->init_clients_state = |
| 598 | MEI_CLIENT_PROPERTIES_MESSAGE; |
| 599 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 600 | /* first property reqeust */ |
| 601 | mei_hbm_prop_req(dev); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 602 | } else { |
| 603 | dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n"); |
| 604 | mei_reset(dev, 1); |
| 605 | return; |
| 606 | } |
| 607 | break; |
| 608 | |
| 609 | case HOST_STOP_RES_CMD: |
| 610 | dev->dev_state = MEI_DEV_DISABLED; |
| 611 | dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n"); |
| 612 | mei_reset(dev, 1); |
| 613 | break; |
| 614 | |
| 615 | case CLIENT_DISCONNECT_REQ_CMD: |
| 616 | /* search for client */ |
| 617 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 618 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 619 | break; |
| 620 | |
| 621 | case ME_STOP_REQ_CMD: |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 622 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 623 | mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr, |
| 624 | dev->wr_ext_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 625 | break; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 626 | default: |
| 627 | BUG(); |
| 628 | break; |
| 629 | |
| 630 | } |
| 631 | } |
| 632 | |