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 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 286 | * mei_hbm_stop_req - send stop request message |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 287 | * |
| 288 | * @dev - mei device |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 289 | * @cl: client info |
| 290 | * |
| 291 | * This function returns -EIO on write failure |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 292 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 293 | static int mei_hbm_stop_req(struct mei_device *dev) |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 294 | { |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 295 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 296 | struct hbm_host_stop_request *req = |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 297 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 298 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 299 | |
| 300 | mei_hbm_hdr(mei_hdr, len); |
| 301 | |
| 302 | memset(req, 0, len); |
| 303 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 304 | req->reason = DRIVER_STOP_REQUEST; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 305 | |
| 306 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 310 | * mei_hbm_cl_flow_control_req - sends flow control request. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 311 | * |
| 312 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 313 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 314 | * |
| 315 | * This function returns -EIO on write failure |
| 316 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 317 | 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] | 318 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 319 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 320 | const size_t len = sizeof(struct hbm_flow_control); |
| 321 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 322 | mei_hbm_hdr(mei_hdr, len); |
| 323 | 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] | 324 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 325 | dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n", |
| 326 | cl->host_client_id, cl->me_client_id); |
| 327 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 328 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 332 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 333 | * |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 334 | * @dev: the device structure |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 335 | * @flow: flow control. |
| 336 | */ |
| 337 | static void mei_hbm_add_single_flow_creds(struct mei_device *dev, |
| 338 | struct hbm_flow_control *flow) |
| 339 | { |
| 340 | struct mei_me_client *client; |
| 341 | int i; |
| 342 | |
| 343 | for (i = 0; i < dev->me_clients_num; i++) { |
| 344 | client = &dev->me_clients[i]; |
| 345 | if (client && flow->me_addr == client->client_id) { |
| 346 | if (client->props.single_recv_buf) { |
| 347 | client->mei_flow_ctrl_creds++; |
| 348 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", |
| 349 | flow->me_addr); |
| 350 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", |
| 351 | client->mei_flow_ctrl_creds); |
| 352 | } else { |
| 353 | BUG(); /* error in flow control */ |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | /** |
| 360 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 361 | * |
| 362 | * @dev: the device structure |
| 363 | * @flow_control: flow control response bus message |
| 364 | */ |
| 365 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
| 366 | struct hbm_flow_control *flow_control) |
| 367 | { |
| 368 | struct mei_cl *cl = NULL; |
| 369 | struct mei_cl *next = NULL; |
| 370 | |
| 371 | if (!flow_control->host_addr) { |
| 372 | /* single receive buffer */ |
| 373 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 374 | return; |
| 375 | } |
| 376 | |
| 377 | /* normal connection */ |
| 378 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 379 | if (mei_hbm_cl_addr_equal(cl, flow_control)) { |
| 380 | cl->mei_flow_ctrl_creds++; |
| 381 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", |
| 382 | flow_control->host_addr, flow_control->me_addr); |
| 383 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", |
| 384 | cl->mei_flow_ctrl_creds); |
| 385 | break; |
| 386 | } |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | |
| 391 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 392 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 393 | * |
| 394 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 395 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 396 | * |
| 397 | * This function returns -EIO on write failure |
| 398 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 399 | 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] | 400 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 401 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 402 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 403 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 404 | mei_hbm_hdr(mei_hdr, len); |
| 405 | 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] | 406 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 407 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 411 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW |
| 412 | * |
| 413 | * @dev: the device structure |
| 414 | * @cl: a client to disconnect from |
| 415 | * |
| 416 | * This function returns -EIO on write failure |
| 417 | */ |
| 418 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) |
| 419 | { |
| 420 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 421 | const size_t len = sizeof(struct hbm_client_connect_response); |
| 422 | |
| 423 | mei_hbm_hdr(mei_hdr, len); |
| 424 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, dev->wr_msg.data, len); |
| 425 | |
| 426 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 427 | } |
| 428 | |
| 429 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 430 | * mei_hbm_cl_disconnect_res - disconnect response from ME |
| 431 | * |
| 432 | * @dev: the device structure |
| 433 | * @rs: disconnect response bus message |
| 434 | */ |
| 435 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, |
| 436 | struct hbm_client_connect_response *rs) |
| 437 | { |
| 438 | struct mei_cl *cl; |
| 439 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 440 | |
| 441 | dev_dbg(&dev->pdev->dev, |
| 442 | "disconnect_response:\n" |
| 443 | "ME Client = %d\n" |
| 444 | "Host Client = %d\n" |
| 445 | "Status = %d\n", |
| 446 | rs->me_addr, |
| 447 | rs->host_addr, |
| 448 | rs->status); |
| 449 | |
| 450 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 451 | cl = pos->cl; |
| 452 | |
| 453 | if (!cl) { |
| 454 | list_del(&pos->list); |
| 455 | return; |
| 456 | } |
| 457 | |
| 458 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); |
| 459 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 460 | list_del(&pos->list); |
| 461 | if (!rs->status) |
| 462 | cl->state = MEI_FILE_DISCONNECTED; |
| 463 | |
| 464 | cl->status = 0; |
| 465 | cl->timer_count = 0; |
| 466 | break; |
| 467 | } |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 472 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 473 | * |
| 474 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 475 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 476 | * |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 477 | * returns -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 478 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 479 | 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] | 480 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 481 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 482 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 483 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 484 | mei_hbm_hdr(mei_hdr, len); |
| 485 | 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] | 486 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 487 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 491 | * mei_hbm_cl_connect_res - connect response from the ME |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 492 | * |
| 493 | * @dev: the device structure |
| 494 | * @rs: connect response bus message |
| 495 | */ |
| 496 | static void mei_hbm_cl_connect_res(struct mei_device *dev, |
| 497 | struct hbm_client_connect_response *rs) |
| 498 | { |
| 499 | |
| 500 | struct mei_cl *cl; |
| 501 | struct mei_cl_cb *pos = NULL, *next = NULL; |
| 502 | |
| 503 | dev_dbg(&dev->pdev->dev, |
| 504 | "connect_response:\n" |
| 505 | "ME Client = %d\n" |
| 506 | "Host Client = %d\n" |
| 507 | "Status = %d\n", |
| 508 | rs->me_addr, |
| 509 | rs->host_addr, |
| 510 | rs->status); |
| 511 | |
| 512 | /* if WD or iamthif client treat specially */ |
| 513 | |
| 514 | if (is_treat_specially_client(&dev->wd_cl, rs)) { |
| 515 | dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); |
| 516 | mei_watchdog_register(dev); |
| 517 | |
| 518 | return; |
| 519 | } |
| 520 | |
| 521 | if (is_treat_specially_client(&dev->iamthif_cl, rs)) { |
| 522 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
| 523 | return; |
| 524 | } |
| 525 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
| 526 | |
| 527 | cl = pos->cl; |
| 528 | if (!cl) { |
| 529 | list_del(&pos->list); |
| 530 | return; |
| 531 | } |
Tomas Winkler | 02a7eec | 2014-02-12 21:41:51 +0200 | [diff] [blame] | 532 | if (pos->fop_type == MEI_FOP_CONNECT) { |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 533 | if (is_treat_specially_client(cl, rs)) { |
| 534 | list_del(&pos->list); |
| 535 | cl->status = 0; |
| 536 | cl->timer_count = 0; |
| 537 | break; |
| 538 | } |
| 539 | } |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | |
| 544 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 545 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
| 546 | * host sends disconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 547 | * |
| 548 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 549 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 550 | * |
| 551 | * returns -ENOMEM on allocation failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 552 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 553 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 554 | struct hbm_client_connect_request *disconnect_req) |
| 555 | { |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 556 | struct mei_cl *cl, *next; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 557 | struct mei_cl_cb *cb; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 558 | |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 559 | list_for_each_entry_safe(cl, next, &dev->file_list, link) { |
| 560 | if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 561 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", |
| 562 | disconnect_req->host_addr, |
| 563 | disconnect_req->me_addr); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 564 | cl->state = MEI_FILE_DISCONNECTED; |
| 565 | cl->timer_count = 0; |
| 566 | if (cl == &dev->wd_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 567 | dev->wd_pending = false; |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 568 | else if (cl == &dev->iamthif_cl) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 569 | dev->iamthif_timer = 0; |
| 570 | |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 571 | cb = mei_io_cb_init(cl, NULL); |
| 572 | if (!cb) |
| 573 | return -ENOMEM; |
| 574 | cb->fop_type = MEI_FOP_DISCONNECT_RSP; |
| 575 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
| 576 | list_add(&cb->list, &dev->ctrl_wr_list.list); |
| 577 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 578 | break; |
| 579 | } |
| 580 | } |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 581 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | |
| 585 | /** |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 586 | * mei_hbm_version_is_supported - checks whether the driver can |
| 587 | * support the hbm version of the device |
| 588 | * |
| 589 | * @dev: the device structure |
| 590 | * returns true if driver can support hbm version of the device |
| 591 | */ |
| 592 | bool mei_hbm_version_is_supported(struct mei_device *dev) |
| 593 | { |
| 594 | return (dev->version.major_version < HBM_MAJOR_VERSION) || |
| 595 | (dev->version.major_version == HBM_MAJOR_VERSION && |
| 596 | dev->version.minor_version <= HBM_MINOR_VERSION); |
| 597 | } |
| 598 | |
| 599 | /** |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 600 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 601 | * handle the read bus message cmd processing. |
| 602 | * |
| 603 | * @dev: the device structure |
| 604 | * @mei_hdr: header of bus message |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 605 | * |
| 606 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 607 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 608 | 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] | 609 | { |
| 610 | struct mei_bus_message *mei_msg; |
| 611 | struct mei_me_client *me_client; |
| 612 | struct hbm_host_version_response *version_res; |
| 613 | struct hbm_client_connect_response *connect_res; |
| 614 | struct hbm_client_connect_response *disconnect_res; |
| 615 | struct hbm_client_connect_request *disconnect_req; |
| 616 | struct hbm_flow_control *flow_control; |
| 617 | struct hbm_props_response *props_res; |
| 618 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 619 | |
| 620 | /* read the message to our buffer */ |
| 621 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 622 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 623 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
| 624 | |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 625 | /* ignore spurious message and prevent reset nesting |
| 626 | * hbm is put to idle during system reset |
| 627 | */ |
| 628 | if (dev->hbm_state == MEI_HBM_IDLE) { |
| 629 | dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n"); |
| 630 | return 0; |
| 631 | } |
| 632 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 633 | switch (mei_msg->hbm_cmd) { |
| 634 | case HOST_START_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 635 | dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n"); |
| 636 | |
| 637 | dev->init_clients_timer = 0; |
| 638 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 639 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 640 | |
| 641 | dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
| 642 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
| 643 | version_res->me_max_version.major_version, |
| 644 | version_res->me_max_version.minor_version); |
| 645 | |
| 646 | if (version_res->host_version_supported) { |
| 647 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 648 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 649 | } else { |
| 650 | dev->version.major_version = |
| 651 | version_res->me_max_version.major_version; |
| 652 | dev->version.minor_version = |
| 653 | version_res->me_max_version.minor_version; |
| 654 | } |
| 655 | |
| 656 | if (!mei_hbm_version_is_supported(dev)) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 657 | 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] | 658 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 659 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 660 | if (mei_hbm_stop_req(dev)) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 661 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
| 662 | return -EIO; |
| 663 | } |
| 664 | break; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 665 | } |
| 666 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 667 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 668 | dev->hbm_state != MEI_HBM_START) { |
| 669 | dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
| 670 | dev->dev_state, dev->hbm_state); |
| 671 | return -EPROTO; |
| 672 | } |
| 673 | |
| 674 | dev->hbm_state = MEI_HBM_STARTED; |
| 675 | |
| 676 | if (mei_hbm_enum_clients_req(dev)) { |
| 677 | dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n"); |
| 678 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 679 | } |
| 680 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 681 | wake_up_interruptible(&dev->wait_recvd_msg); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 682 | break; |
| 683 | |
| 684 | case CLIENT_CONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 685 | dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n"); |
| 686 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 687 | connect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 688 | mei_hbm_cl_connect_res(dev, connect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 689 | wake_up(&dev->wait_recvd_msg); |
| 690 | break; |
| 691 | |
| 692 | case CLIENT_DISCONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 693 | dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n"); |
| 694 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 695 | disconnect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 696 | mei_hbm_cl_disconnect_res(dev, disconnect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 697 | wake_up(&dev->wait_recvd_msg); |
| 698 | break; |
| 699 | |
| 700 | case MEI_FLOW_CONTROL_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 701 | dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n"); |
| 702 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 703 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 704 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 705 | break; |
| 706 | |
| 707 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 708 | dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n"); |
| 709 | |
| 710 | dev->init_clients_timer = 0; |
| 711 | |
| 712 | if (dev->me_clients == NULL) { |
| 713 | dev_err(&dev->pdev->dev, "hbm: properties response: mei_clients not allocated\n"); |
| 714 | return -EPROTO; |
| 715 | } |
| 716 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 717 | props_res = (struct hbm_props_response *)mei_msg; |
| 718 | me_client = &dev->me_clients[dev->me_client_presentation_num]; |
| 719 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 720 | if (props_res->status) { |
| 721 | dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n", |
| 722 | props_res->status); |
| 723 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | if (me_client->client_id != props_res->address) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 727 | dev_err(&dev->pdev->dev, "hbm: properties response: address mismatch %d ?= %d\n", |
| 728 | me_client->client_id, props_res->address); |
| 729 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 730 | } |
| 731 | |
| 732 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 733 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 734 | dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
| 735 | dev->dev_state, dev->hbm_state); |
| 736 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 737 | } |
| 738 | |
| 739 | me_client->props = props_res->client_properties; |
| 740 | dev->me_client_index++; |
| 741 | dev->me_client_presentation_num++; |
| 742 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 743 | /* request property for the next client */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 744 | if (mei_hbm_prop_req(dev)) |
| 745 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 746 | |
| 747 | break; |
| 748 | |
| 749 | case HOST_ENUM_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 750 | dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n"); |
| 751 | |
| 752 | dev->init_clients_timer = 0; |
| 753 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 754 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
Tomas Winkler | 23f5a32 | 2013-09-02 03:11:01 +0300 | [diff] [blame] | 755 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
| 756 | < sizeof(enum_res->valid_addresses)); |
| 757 | memcpy(dev->me_clients_map, enum_res->valid_addresses, |
| 758 | sizeof(enum_res->valid_addresses)); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 759 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 760 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 761 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { |
| 762 | dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
| 763 | dev->dev_state, dev->hbm_state); |
| 764 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 765 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 766 | |
| 767 | if (mei_hbm_me_cl_allocate(dev)) { |
| 768 | dev_err(&dev->pdev->dev, "hbm: enumeration response: cannot allocate clients array\n"); |
| 769 | return -ENOMEM; |
| 770 | } |
| 771 | |
| 772 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
| 773 | |
| 774 | /* first property request */ |
| 775 | if (mei_hbm_prop_req(dev)) |
| 776 | return -EIO; |
| 777 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 778 | break; |
| 779 | |
| 780 | case HOST_STOP_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 781 | dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n"); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 782 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 783 | dev->init_clients_timer = 0; |
| 784 | |
| 785 | if (dev->hbm_state != MEI_HBM_STOPPED) { |
| 786 | dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
| 787 | dev->dev_state, dev->hbm_state); |
| 788 | return -EPROTO; |
| 789 | } |
| 790 | |
Tomas Winkler | 33ec082 | 2014-01-12 00:36:09 +0200 | [diff] [blame] | 791 | dev->dev_state = MEI_DEV_POWER_DOWN; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 792 | dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n"); |
| 793 | /* force the reset */ |
| 794 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 795 | break; |
| 796 | |
| 797 | case CLIENT_DISCONNECT_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 798 | dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n"); |
| 799 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 800 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 801 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 802 | break; |
| 803 | |
| 804 | case ME_STOP_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 805 | dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 806 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame^] | 807 | if (mei_hbm_stop_req(dev)) { |
| 808 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
| 809 | return -EIO; |
| 810 | } |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 811 | break; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 812 | default: |
| 813 | BUG(); |
| 814 | break; |
| 815 | |
| 816 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 817 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 818 | } |
| 819 | |