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 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 17 | #include <linux/export.h> |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 18 | #include <linux/sched.h> |
| 19 | #include <linux/wait.h> |
Tomas Winkler | 180ea05 | 2014-03-18 22:52:02 +0200 | [diff] [blame] | 20 | #include <linux/pm_runtime.h> |
Tomas Winkler | 1f18035 | 2014-09-29 16:31:46 +0300 | [diff] [blame] | 21 | #include <linux/slab.h> |
| 22 | |
| 23 | #include <linux/mei.h> |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 24 | |
| 25 | #include "mei_dev.h" |
Tomas Winkler | 0edb23f | 2013-01-08 23:07:12 +0200 | [diff] [blame] | 26 | #include "hbm.h" |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 27 | #include "client.h" |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 28 | |
Tomas Winkler | 89778d6 | 2014-08-21 14:29:16 +0300 | [diff] [blame] | 29 | static const char *mei_hbm_status_str(enum mei_hbm_status status) |
| 30 | { |
| 31 | #define MEI_HBM_STATUS(status) case MEI_HBMS_##status: return #status |
| 32 | switch (status) { |
| 33 | MEI_HBM_STATUS(SUCCESS); |
| 34 | MEI_HBM_STATUS(CLIENT_NOT_FOUND); |
| 35 | MEI_HBM_STATUS(ALREADY_EXISTS); |
| 36 | MEI_HBM_STATUS(REJECTED); |
| 37 | MEI_HBM_STATUS(INVALID_PARAMETER); |
| 38 | MEI_HBM_STATUS(NOT_ALLOWED); |
| 39 | MEI_HBM_STATUS(ALREADY_STARTED); |
| 40 | MEI_HBM_STATUS(NOT_STARTED); |
| 41 | default: return "unknown"; |
| 42 | } |
| 43 | #undef MEI_HBM_STATUS |
| 44 | }; |
| 45 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 46 | static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) |
| 47 | { |
| 48 | #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status |
| 49 | switch (status) { |
| 50 | MEI_CL_CS(SUCCESS); |
| 51 | MEI_CL_CS(NOT_FOUND); |
| 52 | MEI_CL_CS(ALREADY_STARTED); |
| 53 | MEI_CL_CS(OUT_OF_RESOURCES); |
| 54 | MEI_CL_CS(MESSAGE_SMALL); |
| 55 | default: return "unknown"; |
| 56 | } |
| 57 | #undef MEI_CL_CCS |
| 58 | } |
| 59 | |
Alexander Usyskin | 1beeb4b | 2014-09-29 16:31:33 +0300 | [diff] [blame] | 60 | const char *mei_hbm_state_str(enum mei_hbm_state state) |
| 61 | { |
| 62 | #define MEI_HBM_STATE(state) case MEI_HBM_##state: return #state |
| 63 | switch (state) { |
| 64 | MEI_HBM_STATE(IDLE); |
| 65 | MEI_HBM_STATE(STARTING); |
| 66 | MEI_HBM_STATE(STARTED); |
| 67 | MEI_HBM_STATE(ENUM_CLIENTS); |
| 68 | MEI_HBM_STATE(CLIENT_PROPERTIES); |
| 69 | MEI_HBM_STATE(STOPPED); |
| 70 | default: |
| 71 | return "unknown"; |
| 72 | } |
| 73 | #undef MEI_HBM_STATE |
| 74 | } |
| 75 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 76 | /** |
| 77 | * mei_cl_conn_status_to_errno - convert client connect response |
| 78 | * status to error code |
| 79 | * |
| 80 | * @status: client connect response status |
| 81 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 82 | * Return: corresponding error code |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 83 | */ |
| 84 | static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) |
| 85 | { |
| 86 | switch (status) { |
| 87 | case MEI_CL_CONN_SUCCESS: return 0; |
| 88 | case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; |
| 89 | case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; |
| 90 | case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; |
| 91 | case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; |
| 92 | default: return -EINVAL; |
| 93 | } |
| 94 | } |
| 95 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 96 | /** |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame] | 97 | * mei_hbm_idle - set hbm to idle state |
| 98 | * |
| 99 | * @dev: the device structure |
| 100 | */ |
| 101 | void mei_hbm_idle(struct mei_device *dev) |
| 102 | { |
| 103 | dev->init_clients_timer = 0; |
| 104 | dev->hbm_state = MEI_HBM_IDLE; |
| 105 | } |
| 106 | |
| 107 | /** |
Tomas Winkler | 25ca647 | 2014-08-21 14:29:14 +0300 | [diff] [blame] | 108 | * mei_me_cl_remove_all - remove all me clients |
| 109 | * |
| 110 | * @dev: the device structure |
| 111 | */ |
| 112 | static void mei_me_cl_remove_all(struct mei_device *dev) |
| 113 | { |
| 114 | struct mei_me_client *me_cl, *next; |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 115 | |
Tomas Winkler | 25ca647 | 2014-08-21 14:29:14 +0300 | [diff] [blame] | 116 | list_for_each_entry_safe(me_cl, next, &dev->me_clients, list) { |
| 117 | list_del(&me_cl->list); |
| 118 | kfree(me_cl); |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /** |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame] | 123 | * mei_hbm_reset - reset hbm counters and book keeping data structurs |
| 124 | * |
| 125 | * @dev: the device structure |
| 126 | */ |
| 127 | void mei_hbm_reset(struct mei_device *dev) |
| 128 | { |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame] | 129 | dev->me_client_index = 0; |
| 130 | |
Tomas Winkler | 25ca647 | 2014-08-21 14:29:14 +0300 | [diff] [blame] | 131 | mei_me_cl_remove_all(dev); |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame] | 132 | |
| 133 | mei_hbm_idle(dev); |
| 134 | } |
| 135 | |
| 136 | /** |
Tomas Winkler | 2190fe2 | 2014-09-29 16:31:40 +0300 | [diff] [blame] | 137 | * mei_hbm_hdr - construct hbm header |
| 138 | * |
| 139 | * @hdr: hbm header |
| 140 | * @length: payload length |
| 141 | */ |
| 142 | |
| 143 | static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length) |
| 144 | { |
| 145 | hdr->host_addr = 0; |
| 146 | hdr->me_addr = 0; |
| 147 | hdr->length = length; |
| 148 | hdr->msg_complete = 1; |
| 149 | hdr->reserved = 0; |
| 150 | } |
| 151 | |
| 152 | /** |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 153 | * mei_hbm_cl_hdr - construct client hbm header |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 154 | * |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 155 | * @cl: client |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 156 | * @hbm_cmd: host bus message command |
| 157 | * @buf: buffer for cl header |
| 158 | * @len: buffer length |
| 159 | */ |
| 160 | static inline |
| 161 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) |
| 162 | { |
| 163 | struct mei_hbm_cl_cmd *cmd = buf; |
| 164 | |
| 165 | memset(cmd, 0, len); |
| 166 | |
| 167 | cmd->hbm_cmd = hbm_cmd; |
| 168 | cmd->host_addr = cl->host_client_id; |
| 169 | cmd->me_addr = cl->me_client_id; |
| 170 | } |
| 171 | |
| 172 | /** |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 173 | * mei_hbm_cl_write - write simple hbm client message |
| 174 | * |
| 175 | * @dev: the device structure |
| 176 | * @cl: client |
| 177 | * @hbm_cmd: host bus message command |
| 178 | * @len: buffer length |
Alexander Usyskin | ce23139 | 2014-09-29 16:31:50 +0300 | [diff] [blame^] | 179 | * |
| 180 | * Return: 0 on success, <0 on failure. |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 181 | */ |
| 182 | static inline |
| 183 | int mei_hbm_cl_write(struct mei_device *dev, |
| 184 | struct mei_cl *cl, u8 hbm_cmd, size_t len) |
| 185 | { |
| 186 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 187 | |
| 188 | mei_hbm_hdr(mei_hdr, len); |
| 189 | mei_hbm_cl_hdr(cl, hbm_cmd, dev->wr_msg.data, len); |
| 190 | |
| 191 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 192 | } |
| 193 | |
| 194 | /** |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 195 | * mei_hbm_cl_addr_equal - check if the client's and |
| 196 | * the message address match |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 197 | * |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 198 | * @cl: client |
| 199 | * @cmd: hbm client message |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 200 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 201 | * Return: true if addresses are the same |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 202 | */ |
| 203 | static inline |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 204 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd) |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 205 | { |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 206 | return cl->host_client_id == cmd->host_addr && |
| 207 | cl->me_client_id == cmd->me_addr; |
| 208 | } |
| 209 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 210 | /** |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 211 | * mei_hbm_cl_find_by_cmd - find recipient client |
| 212 | * |
| 213 | * @dev: the device structure |
| 214 | * @buf: a buffer with hbm cl command |
| 215 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 216 | * Return: the recipient client or NULL if not found |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 217 | */ |
| 218 | static inline |
| 219 | struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf) |
| 220 | { |
| 221 | struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf; |
| 222 | struct mei_cl *cl; |
| 223 | |
| 224 | list_for_each_entry(cl, &dev->file_list, link) |
| 225 | if (mei_hbm_cl_addr_equal(cl, cmd)) |
| 226 | return cl; |
| 227 | return NULL; |
| 228 | } |
| 229 | |
| 230 | |
| 231 | /** |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 232 | * mei_hbm_start_wait - wait for start response message. |
| 233 | * |
| 234 | * @dev: the device structure |
| 235 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 236 | * Return: 0 on success and < 0 on failure |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 237 | */ |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 238 | int mei_hbm_start_wait(struct mei_device *dev) |
| 239 | { |
| 240 | int ret; |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 241 | |
| 242 | if (dev->hbm_state > MEI_HBM_STARTING) |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 243 | return 0; |
| 244 | |
| 245 | mutex_unlock(&dev->device_lock); |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 246 | ret = wait_event_timeout(dev->wait_hbm_start, |
| 247 | dev->hbm_state != MEI_HBM_STARTING, |
Tomas Winkler | 7d93e58 | 2014-01-14 23:10:10 +0200 | [diff] [blame] | 248 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 249 | mutex_lock(&dev->device_lock); |
| 250 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 251 | if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) { |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 252 | dev->hbm_state = MEI_HBM_IDLE; |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 253 | dev_err(dev->dev, "waiting for mei start failed\n"); |
Alexander Usyskin | 7ca96aa | 2014-02-19 17:35:49 +0200 | [diff] [blame] | 254 | return -ETIME; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 255 | } |
| 256 | return 0; |
| 257 | } |
| 258 | |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 259 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 260 | * mei_hbm_start_req - sends start request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 261 | * |
| 262 | * @dev: the device structure |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 263 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 264 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 265 | */ |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 266 | int mei_hbm_start_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 267 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 268 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 269 | struct hbm_host_version_request *start_req; |
| 270 | const size_t len = sizeof(struct hbm_host_version_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 271 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 272 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 273 | mei_hbm_reset(dev); |
| 274 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 275 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 276 | |
| 277 | /* host start message */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 278 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 279 | memset(start_req, 0, len); |
| 280 | start_req->hbm_cmd = HOST_START_REQ_CMD; |
| 281 | start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 282 | start_req->host_version.minor_version = HBM_MINOR_VERSION; |
| 283 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 284 | dev->hbm_state = MEI_HBM_IDLE; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 285 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 286 | if (ret) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 287 | dev_err(dev->dev, "version message write failed: ret = %d\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 288 | ret); |
| 289 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 290 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 291 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 292 | dev->hbm_state = MEI_HBM_STARTING; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 293 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 294 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 295 | } |
| 296 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 297 | /* |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 298 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 299 | * |
| 300 | * @dev: the device structure |
| 301 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 302 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 303 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 304 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 305 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 306 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 307 | struct hbm_host_enum_request *enum_req; |
| 308 | const size_t len = sizeof(struct hbm_host_enum_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 309 | int ret; |
| 310 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 311 | /* enumerate clients */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 312 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 313 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 314 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
| 315 | memset(enum_req, 0, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 316 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
| 317 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 318 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 319 | if (ret) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 320 | dev_err(dev->dev, "enumeration request write failed: ret = %d.\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 321 | ret); |
| 322 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 323 | } |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 324 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 325 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 326 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 327 | } |
| 328 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 329 | /* |
| 330 | * mei_hbm_me_cl_add - add new me client to the list |
| 331 | * |
| 332 | * @dev: the device structure |
| 333 | * @res: hbm property response |
| 334 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 335 | * Return: 0 on success and -ENOMEM on allocation failure |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 336 | */ |
| 337 | |
| 338 | static int mei_hbm_me_cl_add(struct mei_device *dev, |
| 339 | struct hbm_props_response *res) |
| 340 | { |
| 341 | struct mei_me_client *me_cl; |
| 342 | |
| 343 | me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL); |
| 344 | if (!me_cl) |
| 345 | return -ENOMEM; |
| 346 | |
| 347 | me_cl->props = res->client_properties; |
| 348 | me_cl->client_id = res->me_addr; |
| 349 | me_cl->mei_flow_ctrl_creds = 0; |
| 350 | |
| 351 | list_add(&me_cl->list, &dev->me_clients); |
| 352 | return 0; |
| 353 | } |
| 354 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 355 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 356 | * mei_hbm_prop_req - request property for a single client |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 357 | * |
| 358 | * @dev: the device structure |
| 359 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 360 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 361 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 362 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 363 | static int mei_hbm_prop_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 364 | { |
| 365 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 366 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 367 | struct hbm_props_request *prop_req; |
| 368 | const size_t len = sizeof(struct hbm_props_request); |
| 369 | unsigned long next_client_index; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 370 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 371 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 372 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
| 373 | dev->me_client_index); |
| 374 | |
| 375 | /* We got all client properties */ |
| 376 | if (next_client_index == MEI_CLIENTS_MAX) { |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 377 | dev->hbm_state = MEI_HBM_STARTED; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 378 | schedule_work(&dev->init_work); |
| 379 | |
| 380 | return 0; |
| 381 | } |
| 382 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 383 | mei_hbm_hdr(mei_hdr, len); |
| 384 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 385 | |
| 386 | memset(prop_req, 0, sizeof(struct hbm_props_request)); |
| 387 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 388 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
Tomas Winkler | 3438c1f | 2014-08-21 14:29:10 +0300 | [diff] [blame] | 389 | prop_req->me_addr = next_client_index; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 390 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 391 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 392 | if (ret) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 393 | dev_err(dev->dev, "properties request write failed: ret = %d\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 394 | ret); |
| 395 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 399 | dev->me_client_index = next_client_index; |
| 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 404 | /* |
| 405 | * mei_hbm_pg - sends pg command |
| 406 | * |
| 407 | * @dev: the device structure |
| 408 | * @pg_cmd: the pg command code |
| 409 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 410 | * Return: -EIO on write failure |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 411 | * -EOPNOTSUPP if the operation is not supported by the protocol |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 412 | */ |
| 413 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) |
| 414 | { |
| 415 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 416 | struct hbm_power_gate *req; |
| 417 | const size_t len = sizeof(struct hbm_power_gate); |
| 418 | int ret; |
| 419 | |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 420 | if (!dev->hbm_f_pg_supported) |
| 421 | return -EOPNOTSUPP; |
| 422 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 423 | mei_hbm_hdr(mei_hdr, len); |
| 424 | |
| 425 | req = (struct hbm_power_gate *)dev->wr_msg.data; |
| 426 | memset(req, 0, len); |
| 427 | req->hbm_cmd = pg_cmd; |
| 428 | |
| 429 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 430 | if (ret) |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 431 | dev_err(dev->dev, "power gate command write failed.\n"); |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 432 | return ret; |
| 433 | } |
| 434 | EXPORT_SYMBOL_GPL(mei_hbm_pg); |
| 435 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 436 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 437 | * mei_hbm_stop_req - send stop request message |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 438 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 439 | * @dev: mei device |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 440 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 441 | * Return: -EIO on write failure |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 442 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 443 | static int mei_hbm_stop_req(struct mei_device *dev) |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 444 | { |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 445 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 446 | struct hbm_host_stop_request *req = |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 447 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 448 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 449 | |
| 450 | mei_hbm_hdr(mei_hdr, len); |
| 451 | |
| 452 | memset(req, 0, len); |
| 453 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 454 | req->reason = DRIVER_STOP_REQUEST; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 455 | |
| 456 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 460 | * mei_hbm_cl_flow_control_req - sends flow control request. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 461 | * |
| 462 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 463 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 464 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 465 | * Return: -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 466 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 467 | 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] | 468 | { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 469 | const size_t len = sizeof(struct hbm_flow_control); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 470 | |
Tomas Winkler | 4692218 | 2014-03-16 14:35:55 +0200 | [diff] [blame] | 471 | cl_dbg(dev, cl, "sending flow control\n"); |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 472 | return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 476 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 477 | * |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 478 | * @dev: the device structure |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 479 | * @flow: flow control. |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 480 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 481 | * Return: 0 on success, < 0 otherwise |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 482 | */ |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 483 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 484 | struct hbm_flow_control *flow) |
| 485 | { |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 486 | struct mei_me_client *me_cl; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 487 | |
Tomas Winkler | d320832 | 2014-08-24 12:08:55 +0300 | [diff] [blame] | 488 | me_cl = mei_me_cl_by_id(dev, flow->me_addr); |
| 489 | if (!me_cl) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 490 | dev_err(dev->dev, "no such me client %d\n", |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 491 | flow->me_addr); |
Tomas Winkler | d320832 | 2014-08-24 12:08:55 +0300 | [diff] [blame] | 492 | return -ENOENT; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 493 | } |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 494 | |
Tomas Winkler | d320832 | 2014-08-24 12:08:55 +0300 | [diff] [blame] | 495 | if (WARN_ON(me_cl->props.single_recv_buf == 0)) |
| 496 | return -EINVAL; |
| 497 | |
| 498 | me_cl->mei_flow_ctrl_creds++; |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 499 | dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n", |
Tomas Winkler | d320832 | 2014-08-24 12:08:55 +0300 | [diff] [blame] | 500 | flow->me_addr, me_cl->mei_flow_ctrl_creds); |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 501 | |
| 502 | return 0; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | /** |
| 506 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 507 | * |
| 508 | * @dev: the device structure |
| 509 | * @flow_control: flow control response bus message |
| 510 | */ |
| 511 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 512 | struct hbm_flow_control *flow_control) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 513 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 514 | struct mei_cl *cl; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 515 | |
| 516 | if (!flow_control->host_addr) { |
| 517 | /* single receive buffer */ |
| 518 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 519 | return; |
| 520 | } |
| 521 | |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 522 | cl = mei_hbm_cl_find_by_cmd(dev, flow_control); |
| 523 | if (cl) { |
| 524 | cl->mei_flow_ctrl_creds++; |
| 525 | cl_dbg(dev, cl, "flow control creds = %d.\n", |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 526 | cl->mei_flow_ctrl_creds); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 527 | } |
| 528 | } |
| 529 | |
| 530 | |
| 531 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 532 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 533 | * |
| 534 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 535 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 536 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 537 | * Return: -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 538 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 539 | 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] | 540 | { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 541 | const size_t len = sizeof(struct hbm_client_connect_request); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 542 | |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 543 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 547 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW |
| 548 | * |
| 549 | * @dev: the device structure |
| 550 | * @cl: a client to disconnect from |
| 551 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 552 | * Return: -EIO on write failure |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 553 | */ |
| 554 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) |
| 555 | { |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 556 | const size_t len = sizeof(struct hbm_client_connect_response); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 557 | |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 558 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len); |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | /** |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 562 | * mei_hbm_cl_disconnect_res - update the client state according |
| 563 | * disconnect response |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 564 | * |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 565 | * @cl: mei host client |
| 566 | * @cmd: disconnect client response host bus message |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 567 | */ |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 568 | static void mei_hbm_cl_disconnect_res(struct mei_cl *cl, |
| 569 | struct mei_hbm_cl_cmd *cmd) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 570 | { |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 571 | struct hbm_client_connect_response *rs = |
| 572 | (struct hbm_client_connect_response *)cmd; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 573 | |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 574 | dev_dbg(cl->dev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n", |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 575 | rs->me_addr, rs->host_addr, rs->status); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 576 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 577 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
| 578 | cl->state = MEI_FILE_DISCONNECTED; |
| 579 | cl->status = 0; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 583 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 584 | * |
| 585 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 586 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 587 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 588 | * Return: -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 589 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 590 | 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] | 591 | { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 592 | const size_t len = sizeof(struct hbm_client_connect_request); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 593 | |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 594 | return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | /** |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 598 | * mei_hbm_cl_connect_res - update the client state according |
| 599 | * connection response |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 600 | * |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 601 | * @cl: mei host client |
| 602 | * @cmd: connect client response host bus message |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 603 | */ |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 604 | static void mei_hbm_cl_connect_res(struct mei_cl *cl, |
| 605 | struct mei_hbm_cl_cmd *cmd) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 606 | { |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 607 | struct hbm_client_connect_response *rs = |
| 608 | (struct hbm_client_connect_response *)cmd; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 609 | |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 610 | dev_dbg(cl->dev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n", |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 611 | rs->me_addr, rs->host_addr, |
| 612 | mei_cl_conn_status_str(rs->status)); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 613 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 614 | if (rs->status == MEI_CL_CONN_SUCCESS) |
| 615 | cl->state = MEI_FILE_CONNECTED; |
| 616 | else |
| 617 | cl->state = MEI_FILE_DISCONNECTED; |
| 618 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
| 619 | } |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 620 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 621 | /** |
| 622 | * mei_hbm_cl_res - process hbm response received on behalf |
| 623 | * an client |
| 624 | * |
| 625 | * @dev: the device structure |
| 626 | * @rs: hbm client message |
| 627 | * @fop_type: file operation type |
| 628 | */ |
| 629 | static void mei_hbm_cl_res(struct mei_device *dev, |
| 630 | struct mei_hbm_cl_cmd *rs, |
| 631 | enum mei_cb_file_ops fop_type) |
| 632 | { |
| 633 | struct mei_cl *cl; |
| 634 | struct mei_cl_cb *cb, *next; |
| 635 | |
| 636 | cl = NULL; |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 637 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 638 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 639 | cl = cb->cl; |
| 640 | /* this should not happen */ |
| 641 | if (WARN_ON(!cl)) { |
| 642 | list_del_init(&cb->list); |
| 643 | continue; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 644 | } |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 645 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 646 | if (cb->fop_type != fop_type) |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 647 | continue; |
| 648 | |
| 649 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 650 | list_del(&cb->list); |
| 651 | break; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 652 | } |
| 653 | } |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 654 | |
| 655 | if (!cl) |
| 656 | return; |
| 657 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 658 | switch (fop_type) { |
| 659 | case MEI_FOP_CONNECT: |
| 660 | mei_hbm_cl_connect_res(cl, rs); |
| 661 | break; |
| 662 | case MEI_FOP_DISCONNECT: |
| 663 | mei_hbm_cl_disconnect_res(cl, rs); |
| 664 | break; |
| 665 | default: |
| 666 | return; |
| 667 | } |
| 668 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 669 | cl->timer_count = 0; |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 670 | wake_up(&cl->wait); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | |
| 674 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 675 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
| 676 | * host sends disconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 677 | * |
| 678 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 679 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 680 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 681 | * Return: -ENOMEM on allocation failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 682 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 683 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 684 | struct hbm_client_connect_request *disconnect_req) |
| 685 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 686 | struct mei_cl *cl; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 687 | struct mei_cl_cb *cb; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 688 | |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 689 | cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); |
| 690 | if (cl) { |
| 691 | cl_dbg(dev, cl, "disconnect request received\n"); |
| 692 | cl->state = MEI_FILE_DISCONNECTED; |
| 693 | cl->timer_count = 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 694 | |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 695 | cb = mei_io_cb_init(cl, NULL); |
| 696 | if (!cb) |
| 697 | return -ENOMEM; |
| 698 | cb->fop_type = MEI_FOP_DISCONNECT_RSP; |
| 699 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
| 700 | list_add(&cb->list, &dev->ctrl_wr_list.list); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 701 | } |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 702 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 703 | } |
| 704 | |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 705 | /** |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 706 | * mei_hbm_config_features - check what hbm features and commands |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 707 | * are supported by the fw |
| 708 | * |
| 709 | * @dev: the device structure |
| 710 | */ |
| 711 | static void mei_hbm_config_features(struct mei_device *dev) |
| 712 | { |
| 713 | /* Power Gating Isolation Support */ |
| 714 | dev->hbm_f_pg_supported = 0; |
| 715 | if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) |
| 716 | dev->hbm_f_pg_supported = 1; |
| 717 | |
| 718 | if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && |
| 719 | dev->version.minor_version >= HBM_MINOR_VERSION_PGI) |
| 720 | dev->hbm_f_pg_supported = 1; |
| 721 | } |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 722 | |
| 723 | /** |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 724 | * mei_hbm_version_is_supported - checks whether the driver can |
| 725 | * support the hbm version of the device |
| 726 | * |
| 727 | * @dev: the device structure |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 728 | * Return: true if driver can support hbm version of the device |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 729 | */ |
| 730 | bool mei_hbm_version_is_supported(struct mei_device *dev) |
| 731 | { |
| 732 | return (dev->version.major_version < HBM_MAJOR_VERSION) || |
| 733 | (dev->version.major_version == HBM_MAJOR_VERSION && |
| 734 | dev->version.minor_version <= HBM_MINOR_VERSION); |
| 735 | } |
| 736 | |
| 737 | /** |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 738 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 739 | * handle the read bus message cmd processing. |
| 740 | * |
| 741 | * @dev: the device structure |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 742 | * @hdr: header of bus message |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 743 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 744 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 745 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 746 | 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] | 747 | { |
| 748 | struct mei_bus_message *mei_msg; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 749 | struct hbm_host_version_response *version_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 750 | struct hbm_props_response *props_res; |
| 751 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 752 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 753 | struct mei_hbm_cl_cmd *cl_cmd; |
| 754 | struct hbm_client_connect_request *disconnect_req; |
| 755 | struct hbm_flow_control *flow_control; |
| 756 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 757 | /* read the message to our buffer */ |
| 758 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 759 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 760 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 761 | cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 762 | |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 763 | /* ignore spurious message and prevent reset nesting |
| 764 | * hbm is put to idle during system reset |
| 765 | */ |
| 766 | if (dev->hbm_state == MEI_HBM_IDLE) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 767 | dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n"); |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 768 | return 0; |
| 769 | } |
| 770 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 771 | switch (mei_msg->hbm_cmd) { |
| 772 | case HOST_START_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 773 | dev_dbg(dev->dev, "hbm: start: response message received.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 774 | |
| 775 | dev->init_clients_timer = 0; |
| 776 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 777 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 778 | |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 779 | dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 780 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
| 781 | version_res->me_max_version.major_version, |
| 782 | version_res->me_max_version.minor_version); |
| 783 | |
| 784 | if (version_res->host_version_supported) { |
| 785 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 786 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 787 | } else { |
| 788 | dev->version.major_version = |
| 789 | version_res->me_max_version.major_version; |
| 790 | dev->version.minor_version = |
| 791 | version_res->me_max_version.minor_version; |
| 792 | } |
| 793 | |
| 794 | if (!mei_hbm_version_is_supported(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 795 | dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 796 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 797 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 798 | if (mei_hbm_stop_req(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 799 | dev_err(dev->dev, "hbm: start: failed to send stop request\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 800 | return -EIO; |
| 801 | } |
| 802 | break; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 803 | } |
| 804 | |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 805 | mei_hbm_config_features(dev); |
| 806 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 807 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 808 | dev->hbm_state != MEI_HBM_STARTING) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 809 | dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 810 | dev->dev_state, dev->hbm_state); |
| 811 | return -EPROTO; |
| 812 | } |
| 813 | |
| 814 | dev->hbm_state = MEI_HBM_STARTED; |
| 815 | |
| 816 | if (mei_hbm_enum_clients_req(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 817 | dev_err(dev->dev, "hbm: start: failed to send enumeration request\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 818 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 819 | } |
| 820 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 821 | wake_up(&dev->wait_hbm_start); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 822 | break; |
| 823 | |
| 824 | case CLIENT_CONNECT_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 825 | dev_dbg(dev->dev, "hbm: client connect response: message received.\n"); |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 826 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 827 | break; |
| 828 | |
| 829 | case CLIENT_DISCONNECT_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 830 | dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n"); |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 831 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 832 | break; |
| 833 | |
| 834 | case MEI_FLOW_CONTROL_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 835 | dev_dbg(dev->dev, "hbm: client flow control response: message received.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 836 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 837 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 838 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 839 | break; |
| 840 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 841 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 842 | dev_dbg(dev->dev, "power gate isolation entry response received\n"); |
Tomas Winkler | ba9cdd0 | 2014-03-18 22:52:00 +0200 | [diff] [blame] | 843 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 844 | if (waitqueue_active(&dev->wait_pg)) |
| 845 | wake_up(&dev->wait_pg); |
| 846 | break; |
| 847 | |
| 848 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 849 | dev_dbg(dev->dev, "power gate isolation exit request received\n"); |
Tomas Winkler | ba9cdd0 | 2014-03-18 22:52:00 +0200 | [diff] [blame] | 850 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 851 | if (waitqueue_active(&dev->wait_pg)) |
| 852 | wake_up(&dev->wait_pg); |
Tomas Winkler | 180ea05 | 2014-03-18 22:52:02 +0200 | [diff] [blame] | 853 | else |
| 854 | /* |
| 855 | * If the driver is not waiting on this then |
| 856 | * this is HW initiated exit from PG. |
| 857 | * Start runtime pm resume sequence to exit from PG. |
| 858 | */ |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 859 | pm_request_resume(dev->dev); |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 860 | break; |
| 861 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 862 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 863 | dev_dbg(dev->dev, "hbm: properties response: message received.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 864 | |
| 865 | dev->init_clients_timer = 0; |
| 866 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 867 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 868 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 869 | dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 870 | dev->dev_state, dev->hbm_state); |
| 871 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 872 | } |
| 873 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 874 | props_res = (struct hbm_props_response *)mei_msg; |
| 875 | |
| 876 | if (props_res->status) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 877 | dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n", |
Tomas Winkler | 89778d6 | 2014-08-21 14:29:16 +0300 | [diff] [blame] | 878 | props_res->status, |
| 879 | mei_hbm_status_str(props_res->status)); |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 880 | return -EPROTO; |
| 881 | } |
| 882 | |
| 883 | mei_hbm_me_cl_add(dev, props_res); |
| 884 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 885 | dev->me_client_index++; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 886 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 887 | /* request property for the next client */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 888 | if (mei_hbm_prop_req(dev)) |
| 889 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 890 | |
| 891 | break; |
| 892 | |
| 893 | case HOST_ENUM_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 894 | dev_dbg(dev->dev, "hbm: enumeration response: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 895 | |
| 896 | dev->init_clients_timer = 0; |
| 897 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 898 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
Tomas Winkler | 23f5a32 | 2013-09-02 03:11:01 +0300 | [diff] [blame] | 899 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
| 900 | < sizeof(enum_res->valid_addresses)); |
| 901 | memcpy(dev->me_clients_map, enum_res->valid_addresses, |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 902 | sizeof(enum_res->valid_addresses)); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 903 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 904 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 905 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 906 | dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 907 | dev->dev_state, dev->hbm_state); |
| 908 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 909 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 910 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 911 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
| 912 | |
| 913 | /* first property request */ |
| 914 | if (mei_hbm_prop_req(dev)) |
| 915 | return -EIO; |
| 916 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 917 | break; |
| 918 | |
| 919 | case HOST_STOP_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 920 | dev_dbg(dev->dev, "hbm: stop response: message received\n"); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 921 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 922 | dev->init_clients_timer = 0; |
| 923 | |
| 924 | if (dev->hbm_state != MEI_HBM_STOPPED) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 925 | dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 926 | dev->dev_state, dev->hbm_state); |
| 927 | return -EPROTO; |
| 928 | } |
| 929 | |
Tomas Winkler | 33ec082 | 2014-01-12 00:36:09 +0200 | [diff] [blame] | 930 | dev->dev_state = MEI_DEV_POWER_DOWN; |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 931 | dev_info(dev->dev, "hbm: stop response: resetting.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 932 | /* force the reset */ |
| 933 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 934 | break; |
| 935 | |
| 936 | case CLIENT_DISCONNECT_REQ_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 937 | dev_dbg(dev->dev, "hbm: disconnect request: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 938 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 939 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 940 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 941 | break; |
| 942 | |
| 943 | case ME_STOP_REQ_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 944 | dev_dbg(dev->dev, "hbm: stop request: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 945 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 946 | if (mei_hbm_stop_req(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 947 | dev_err(dev->dev, "hbm: stop request: failed to send stop request\n"); |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 948 | return -EIO; |
| 949 | } |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 950 | break; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 951 | default: |
| 952 | BUG(); |
| 953 | break; |
| 954 | |
| 955 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 956 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 957 | } |
| 958 | |