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 | /** |
| 108 | * mei_hbm_reset - reset hbm counters and book keeping data structurs |
| 109 | * |
| 110 | * @dev: the device structure |
| 111 | */ |
| 112 | void mei_hbm_reset(struct mei_device *dev) |
| 113 | { |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame] | 114 | dev->me_client_index = 0; |
| 115 | |
Tomas Winkler | 79563db | 2015-01-11 00:07:16 +0200 | [diff] [blame] | 116 | mei_me_cl_rm_all(dev); |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame] | 117 | |
| 118 | mei_hbm_idle(dev); |
| 119 | } |
| 120 | |
| 121 | /** |
Tomas Winkler | 2190fe2 | 2014-09-29 16:31:40 +0300 | [diff] [blame] | 122 | * mei_hbm_hdr - construct hbm header |
| 123 | * |
| 124 | * @hdr: hbm header |
| 125 | * @length: payload length |
| 126 | */ |
| 127 | |
| 128 | static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length) |
| 129 | { |
| 130 | hdr->host_addr = 0; |
| 131 | hdr->me_addr = 0; |
| 132 | hdr->length = length; |
| 133 | hdr->msg_complete = 1; |
| 134 | hdr->reserved = 0; |
| 135 | } |
| 136 | |
| 137 | /** |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 138 | * mei_hbm_cl_hdr - construct client hbm header |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 139 | * |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 140 | * @cl: client |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 141 | * @hbm_cmd: host bus message command |
| 142 | * @buf: buffer for cl header |
| 143 | * @len: buffer length |
| 144 | */ |
| 145 | static inline |
| 146 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) |
| 147 | { |
| 148 | struct mei_hbm_cl_cmd *cmd = buf; |
| 149 | |
| 150 | memset(cmd, 0, len); |
| 151 | |
| 152 | cmd->hbm_cmd = hbm_cmd; |
Alexander Usyskin | 1df629e | 2015-05-04 09:43:56 +0300 | [diff] [blame] | 153 | cmd->host_addr = mei_cl_host_addr(cl); |
Alexander Usyskin | d49ed64 | 2015-05-04 09:43:54 +0300 | [diff] [blame] | 154 | cmd->me_addr = mei_cl_me_id(cl); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | /** |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 158 | * mei_hbm_cl_write - write simple hbm client message |
| 159 | * |
| 160 | * @dev: the device structure |
| 161 | * @cl: client |
| 162 | * @hbm_cmd: host bus message command |
| 163 | * @len: buffer length |
Alexander Usyskin | ce23139 | 2014-09-29 16:31:50 +0300 | [diff] [blame] | 164 | * |
| 165 | * Return: 0 on success, <0 on failure. |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 166 | */ |
| 167 | static inline |
| 168 | int mei_hbm_cl_write(struct mei_device *dev, |
| 169 | struct mei_cl *cl, u8 hbm_cmd, size_t len) |
| 170 | { |
| 171 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 172 | |
| 173 | mei_hbm_hdr(mei_hdr, len); |
| 174 | mei_hbm_cl_hdr(cl, hbm_cmd, dev->wr_msg.data, len); |
| 175 | |
| 176 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 177 | } |
| 178 | |
| 179 | /** |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 180 | * mei_hbm_cl_addr_equal - check if the client's and |
| 181 | * the message address match |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 182 | * |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 183 | * @cl: client |
| 184 | * @cmd: hbm client message |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 185 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 186 | * Return: true if addresses are the same |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 187 | */ |
| 188 | static inline |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 189 | 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] | 190 | { |
Alexander Usyskin | 1df629e | 2015-05-04 09:43:56 +0300 | [diff] [blame] | 191 | return mei_cl_host_addr(cl) == cmd->host_addr && |
Alexander Usyskin | d49ed64 | 2015-05-04 09:43:54 +0300 | [diff] [blame] | 192 | mei_cl_me_id(cl) == cmd->me_addr; |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 193 | } |
| 194 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 195 | /** |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 196 | * mei_hbm_cl_find_by_cmd - find recipient client |
| 197 | * |
| 198 | * @dev: the device structure |
| 199 | * @buf: a buffer with hbm cl command |
| 200 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 201 | * Return: the recipient client or NULL if not found |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 202 | */ |
| 203 | static inline |
| 204 | struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf) |
| 205 | { |
| 206 | struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf; |
| 207 | struct mei_cl *cl; |
| 208 | |
| 209 | list_for_each_entry(cl, &dev->file_list, link) |
| 210 | if (mei_hbm_cl_addr_equal(cl, cmd)) |
| 211 | return cl; |
| 212 | return NULL; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | /** |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 217 | * mei_hbm_start_wait - wait for start response message. |
| 218 | * |
| 219 | * @dev: the device structure |
| 220 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 221 | * Return: 0 on success and < 0 on failure |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 222 | */ |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 223 | int mei_hbm_start_wait(struct mei_device *dev) |
| 224 | { |
| 225 | int ret; |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 226 | |
| 227 | if (dev->hbm_state > MEI_HBM_STARTING) |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 228 | return 0; |
| 229 | |
| 230 | mutex_unlock(&dev->device_lock); |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 231 | ret = wait_event_timeout(dev->wait_hbm_start, |
| 232 | dev->hbm_state != MEI_HBM_STARTING, |
Tomas Winkler | 7d93e58 | 2014-01-14 23:10:10 +0200 | [diff] [blame] | 233 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 234 | mutex_lock(&dev->device_lock); |
| 235 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 236 | if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) { |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 237 | dev->hbm_state = MEI_HBM_IDLE; |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 238 | dev_err(dev->dev, "waiting for mei start failed\n"); |
Alexander Usyskin | 7ca96aa | 2014-02-19 17:35:49 +0200 | [diff] [blame] | 239 | return -ETIME; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 240 | } |
| 241 | return 0; |
| 242 | } |
| 243 | |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 244 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 245 | * mei_hbm_start_req - sends start request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 246 | * |
| 247 | * @dev: the device structure |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 248 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 249 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 250 | */ |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 251 | int mei_hbm_start_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 252 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 253 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 254 | struct hbm_host_version_request *start_req; |
| 255 | const size_t len = sizeof(struct hbm_host_version_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 256 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 257 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 258 | mei_hbm_reset(dev); |
| 259 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 260 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 261 | |
| 262 | /* host start message */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 263 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 264 | memset(start_req, 0, len); |
| 265 | start_req->hbm_cmd = HOST_START_REQ_CMD; |
| 266 | start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 267 | start_req->host_version.minor_version = HBM_MINOR_VERSION; |
| 268 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 269 | dev->hbm_state = MEI_HBM_IDLE; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 270 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 271 | if (ret) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 272 | dev_err(dev->dev, "version message write failed: ret = %d\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 273 | ret); |
| 274 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 275 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 276 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 277 | dev->hbm_state = MEI_HBM_STARTING; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 278 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 279 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 280 | } |
| 281 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 282 | /* |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 283 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 284 | * |
| 285 | * @dev: the device structure |
| 286 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 287 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 288 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 289 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 290 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 291 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 292 | struct hbm_host_enum_request *enum_req; |
| 293 | const size_t len = sizeof(struct hbm_host_enum_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 294 | int ret; |
| 295 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 296 | /* enumerate clients */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 297 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 298 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 299 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
| 300 | memset(enum_req, 0, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 301 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
Tomas Winkler | 70ef835 | 2015-07-23 21:37:12 +0300 | [diff] [blame] | 302 | enum_req->allow_add = dev->hbm_f_dc_supported; |
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 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 305 | if (ret) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 306 | dev_err(dev->dev, "enumeration request write failed: ret = %d.\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 307 | ret); |
| 308 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 309 | } |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 310 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 311 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 312 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 313 | } |
| 314 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 315 | /* |
| 316 | * mei_hbm_me_cl_add - add new me client to the list |
| 317 | * |
| 318 | * @dev: the device structure |
| 319 | * @res: hbm property response |
| 320 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 321 | * Return: 0 on success and -ENOMEM on allocation failure |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 322 | */ |
| 323 | |
| 324 | static int mei_hbm_me_cl_add(struct mei_device *dev, |
| 325 | struct hbm_props_response *res) |
| 326 | { |
| 327 | struct mei_me_client *me_cl; |
Tomas Winkler | 79563db | 2015-01-11 00:07:16 +0200 | [diff] [blame] | 328 | const uuid_le *uuid = &res->client_properties.protocol_name; |
| 329 | |
| 330 | mei_me_cl_rm_by_uuid(dev, uuid); |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 331 | |
| 332 | me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL); |
| 333 | if (!me_cl) |
| 334 | return -ENOMEM; |
| 335 | |
Tomas Winkler | 79563db | 2015-01-11 00:07:16 +0200 | [diff] [blame] | 336 | mei_me_cl_init(me_cl); |
| 337 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 338 | me_cl->props = res->client_properties; |
| 339 | me_cl->client_id = res->me_addr; |
| 340 | me_cl->mei_flow_ctrl_creds = 0; |
| 341 | |
Tomas Winkler | b7d8851 | 2015-02-10 10:39:31 +0200 | [diff] [blame] | 342 | mei_me_cl_add(dev, me_cl); |
| 343 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 344 | return 0; |
| 345 | } |
| 346 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 347 | /** |
Tomas Winkler | 70ef835 | 2015-07-23 21:37:12 +0300 | [diff] [blame] | 348 | * mei_hbm_add_cl_resp - send response to fw on client add request |
| 349 | * |
| 350 | * @dev: the device structure |
| 351 | * @addr: me address |
| 352 | * @status: response status |
| 353 | * |
| 354 | * Return: 0 on success and < 0 on failure |
| 355 | */ |
| 356 | static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status) |
| 357 | { |
| 358 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 359 | struct hbm_add_client_response *resp; |
| 360 | const size_t len = sizeof(struct hbm_add_client_response); |
| 361 | int ret; |
| 362 | |
| 363 | dev_dbg(dev->dev, "adding client response\n"); |
| 364 | |
| 365 | resp = (struct hbm_add_client_response *)dev->wr_msg.data; |
| 366 | |
| 367 | mei_hbm_hdr(mei_hdr, len); |
| 368 | memset(resp, 0, sizeof(struct hbm_add_client_response)); |
| 369 | |
| 370 | resp->hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD; |
| 371 | resp->me_addr = addr; |
| 372 | resp->status = status; |
| 373 | |
| 374 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 375 | if (ret) |
| 376 | dev_err(dev->dev, "add client response write failed: ret = %d\n", |
| 377 | ret); |
| 378 | return ret; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * mei_hbm_fw_add_cl_req - request from the fw to add a client |
| 383 | * |
| 384 | * @dev: the device structure |
| 385 | * @req: add client request |
| 386 | * |
| 387 | * Return: 0 on success and < 0 on failure |
| 388 | */ |
| 389 | static int mei_hbm_fw_add_cl_req(struct mei_device *dev, |
| 390 | struct hbm_add_client_request *req) |
| 391 | { |
| 392 | int ret; |
| 393 | u8 status = MEI_HBMS_SUCCESS; |
| 394 | |
| 395 | BUILD_BUG_ON(sizeof(struct hbm_add_client_request) != |
| 396 | sizeof(struct hbm_props_response)); |
| 397 | |
| 398 | ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req); |
| 399 | if (ret) |
| 400 | status = !MEI_HBMS_SUCCESS; |
| 401 | |
| 402 | return mei_hbm_add_cl_resp(dev, req->me_addr, status); |
| 403 | } |
| 404 | |
| 405 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 406 | * mei_hbm_prop_req - request property for a single client |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 407 | * |
| 408 | * @dev: the device structure |
| 409 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 410 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 411 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 412 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 413 | static int mei_hbm_prop_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 414 | { |
| 415 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 416 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 417 | struct hbm_props_request *prop_req; |
| 418 | const size_t len = sizeof(struct hbm_props_request); |
| 419 | unsigned long next_client_index; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 420 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 421 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 422 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
| 423 | dev->me_client_index); |
| 424 | |
| 425 | /* We got all client properties */ |
| 426 | if (next_client_index == MEI_CLIENTS_MAX) { |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 427 | dev->hbm_state = MEI_HBM_STARTED; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 428 | schedule_work(&dev->init_work); |
| 429 | |
| 430 | return 0; |
| 431 | } |
| 432 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 433 | mei_hbm_hdr(mei_hdr, len); |
| 434 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 435 | |
| 436 | memset(prop_req, 0, sizeof(struct hbm_props_request)); |
| 437 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 438 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
Tomas Winkler | 3438c1f | 2014-08-21 14:29:10 +0300 | [diff] [blame] | 439 | prop_req->me_addr = next_client_index; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 440 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 441 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 442 | if (ret) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 443 | dev_err(dev->dev, "properties request write failed: ret = %d\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 444 | ret); |
| 445 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 449 | dev->me_client_index = next_client_index; |
| 450 | |
| 451 | return 0; |
| 452 | } |
| 453 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 454 | /* |
| 455 | * mei_hbm_pg - sends pg command |
| 456 | * |
| 457 | * @dev: the device structure |
| 458 | * @pg_cmd: the pg command code |
| 459 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 460 | * Return: -EIO on write failure |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 461 | * -EOPNOTSUPP if the operation is not supported by the protocol |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 462 | */ |
| 463 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) |
| 464 | { |
| 465 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 466 | struct hbm_power_gate *req; |
| 467 | const size_t len = sizeof(struct hbm_power_gate); |
| 468 | int ret; |
| 469 | |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 470 | if (!dev->hbm_f_pg_supported) |
| 471 | return -EOPNOTSUPP; |
| 472 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 473 | mei_hbm_hdr(mei_hdr, len); |
| 474 | |
| 475 | req = (struct hbm_power_gate *)dev->wr_msg.data; |
| 476 | memset(req, 0, len); |
| 477 | req->hbm_cmd = pg_cmd; |
| 478 | |
| 479 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 480 | if (ret) |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 481 | dev_err(dev->dev, "power gate command write failed.\n"); |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 482 | return ret; |
| 483 | } |
| 484 | EXPORT_SYMBOL_GPL(mei_hbm_pg); |
| 485 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 486 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 487 | * mei_hbm_stop_req - send stop request message |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 488 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 489 | * @dev: mei device |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 490 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 491 | * Return: -EIO on write failure |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 492 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 493 | static int mei_hbm_stop_req(struct mei_device *dev) |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 494 | { |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 495 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 496 | struct hbm_host_stop_request *req = |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 497 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 498 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 499 | |
| 500 | mei_hbm_hdr(mei_hdr, len); |
| 501 | |
| 502 | memset(req, 0, len); |
| 503 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 504 | req->reason = DRIVER_STOP_REQUEST; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 505 | |
| 506 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 507 | } |
| 508 | |
| 509 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 510 | * mei_hbm_cl_flow_control_req - sends flow control request. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 511 | * |
| 512 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 513 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 514 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 515 | * Return: -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 516 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 517 | 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] | 518 | { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 519 | const size_t len = sizeof(struct hbm_flow_control); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 520 | |
Tomas Winkler | 4692218 | 2014-03-16 14:35:55 +0200 | [diff] [blame] | 521 | cl_dbg(dev, cl, "sending flow control\n"); |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 522 | return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 523 | } |
| 524 | |
| 525 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 526 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 527 | * |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 528 | * @dev: the device structure |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 529 | * @flow: flow control. |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 530 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 531 | * Return: 0 on success, < 0 otherwise |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 532 | */ |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 533 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 534 | struct hbm_flow_control *flow) |
| 535 | { |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 536 | struct mei_me_client *me_cl; |
Tomas Winkler | 79563db | 2015-01-11 00:07:16 +0200 | [diff] [blame] | 537 | int rets; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 538 | |
Tomas Winkler | d320832 | 2014-08-24 12:08:55 +0300 | [diff] [blame] | 539 | me_cl = mei_me_cl_by_id(dev, flow->me_addr); |
| 540 | if (!me_cl) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 541 | dev_err(dev->dev, "no such me client %d\n", |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 542 | flow->me_addr); |
Tomas Winkler | d320832 | 2014-08-24 12:08:55 +0300 | [diff] [blame] | 543 | return -ENOENT; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 544 | } |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 545 | |
Tomas Winkler | 79563db | 2015-01-11 00:07:16 +0200 | [diff] [blame] | 546 | if (WARN_ON(me_cl->props.single_recv_buf == 0)) { |
| 547 | rets = -EINVAL; |
| 548 | goto out; |
| 549 | } |
Tomas Winkler | d320832 | 2014-08-24 12:08:55 +0300 | [diff] [blame] | 550 | |
| 551 | me_cl->mei_flow_ctrl_creds++; |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 552 | 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] | 553 | flow->me_addr, me_cl->mei_flow_ctrl_creds); |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 554 | |
Tomas Winkler | 79563db | 2015-01-11 00:07:16 +0200 | [diff] [blame] | 555 | rets = 0; |
| 556 | out: |
| 557 | mei_me_cl_put(me_cl); |
| 558 | return rets; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | /** |
| 562 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 563 | * |
| 564 | * @dev: the device structure |
| 565 | * @flow_control: flow control response bus message |
| 566 | */ |
| 567 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 568 | struct hbm_flow_control *flow_control) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 569 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 570 | struct mei_cl *cl; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 571 | |
| 572 | if (!flow_control->host_addr) { |
| 573 | /* single receive buffer */ |
| 574 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 575 | return; |
| 576 | } |
| 577 | |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 578 | cl = mei_hbm_cl_find_by_cmd(dev, flow_control); |
| 579 | if (cl) { |
| 580 | cl->mei_flow_ctrl_creds++; |
| 581 | cl_dbg(dev, cl, "flow control creds = %d.\n", |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 582 | cl->mei_flow_ctrl_creds); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 583 | } |
| 584 | } |
| 585 | |
| 586 | |
| 587 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 588 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 589 | * |
| 590 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 591 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 592 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 593 | * Return: -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 594 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 595 | 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] | 596 | { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 597 | const size_t len = sizeof(struct hbm_client_connect_request); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 598 | |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 599 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 603 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW |
| 604 | * |
| 605 | * @dev: the device structure |
| 606 | * @cl: a client to disconnect from |
| 607 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 608 | * Return: -EIO on write failure |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 609 | */ |
| 610 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) |
| 611 | { |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 612 | const size_t len = sizeof(struct hbm_client_connect_response); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 613 | |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 614 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len); |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | /** |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 618 | * mei_hbm_cl_disconnect_res - update the client state according |
| 619 | * disconnect response |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 620 | * |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 621 | * @dev: the device structure |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 622 | * @cl: mei host client |
| 623 | * @cmd: disconnect client response host bus message |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 624 | */ |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 625 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl, |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 626 | struct mei_hbm_cl_cmd *cmd) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 627 | { |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 628 | struct hbm_client_connect_response *rs = |
| 629 | (struct hbm_client_connect_response *)cmd; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 630 | |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 631 | cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 632 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 633 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
Tomas Winkler | 3c66618 | 2015-05-04 09:43:52 +0300 | [diff] [blame] | 634 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 635 | cl->status = 0; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 639 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 640 | * |
| 641 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 642 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 643 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 644 | * Return: -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 645 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 646 | 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] | 647 | { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 648 | const size_t len = sizeof(struct hbm_client_connect_request); |
Tomas Winkler | 92db155 | 2014-09-29 16:31:37 +0300 | [diff] [blame] | 649 | |
Tomas Winkler | 68d1aa6 | 2014-08-21 14:29:11 +0300 | [diff] [blame] | 650 | return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 651 | } |
| 652 | |
| 653 | /** |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 654 | * mei_hbm_cl_connect_res - update the client state according |
| 655 | * connection response |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 656 | * |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 657 | * @dev: the device structure |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 658 | * @cl: mei host client |
| 659 | * @cmd: connect client response host bus message |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 660 | */ |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 661 | static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl, |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 662 | struct mei_hbm_cl_cmd *cmd) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 663 | { |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 664 | struct hbm_client_connect_response *rs = |
| 665 | (struct hbm_client_connect_response *)cmd; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 666 | |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 667 | cl_dbg(dev, cl, "hbm: connect response status=%s\n", |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 668 | mei_cl_conn_status_str(rs->status)); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 669 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 670 | if (rs->status == MEI_CL_CONN_SUCCESS) |
| 671 | cl->state = MEI_FILE_CONNECTED; |
Tomas Winkler | 70ef835 | 2015-07-23 21:37:12 +0300 | [diff] [blame] | 672 | else { |
Tomas Winkler | 3c66618 | 2015-05-04 09:43:52 +0300 | [diff] [blame] | 673 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
Tomas Winkler | 70ef835 | 2015-07-23 21:37:12 +0300 | [diff] [blame] | 674 | if (rs->status == MEI_CL_CONN_NOT_FOUND) |
| 675 | mei_me_cl_del(dev, cl->me_cl); |
| 676 | } |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 677 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
| 678 | } |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 679 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 680 | /** |
| 681 | * mei_hbm_cl_res - process hbm response received on behalf |
| 682 | * an client |
| 683 | * |
| 684 | * @dev: the device structure |
| 685 | * @rs: hbm client message |
| 686 | * @fop_type: file operation type |
| 687 | */ |
| 688 | static void mei_hbm_cl_res(struct mei_device *dev, |
| 689 | struct mei_hbm_cl_cmd *rs, |
| 690 | enum mei_cb_file_ops fop_type) |
| 691 | { |
| 692 | struct mei_cl *cl; |
| 693 | struct mei_cl_cb *cb, *next; |
| 694 | |
| 695 | cl = NULL; |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 696 | 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] | 697 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 698 | cl = cb->cl; |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 699 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 700 | if (cb->fop_type != fop_type) |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 701 | continue; |
| 702 | |
| 703 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
Tomas Winkler | 928fa66 | 2015-02-10 10:39:45 +0200 | [diff] [blame] | 704 | list_del_init(&cb->list); |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 705 | break; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 706 | } |
| 707 | } |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 708 | |
| 709 | if (!cl) |
| 710 | return; |
| 711 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 712 | switch (fop_type) { |
| 713 | case MEI_FOP_CONNECT: |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 714 | mei_hbm_cl_connect_res(dev, cl, rs); |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 715 | break; |
| 716 | case MEI_FOP_DISCONNECT: |
Alexander Usyskin | d512c20 | 2014-10-29 23:50:58 +0200 | [diff] [blame] | 717 | mei_hbm_cl_disconnect_res(dev, cl, rs); |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 718 | break; |
| 719 | default: |
| 720 | return; |
| 721 | } |
| 722 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 723 | cl->timer_count = 0; |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 724 | wake_up(&cl->wait); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | |
| 728 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 729 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
| 730 | * host sends disconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 731 | * |
| 732 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 733 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 734 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 735 | * Return: -ENOMEM on allocation failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 736 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 737 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 738 | struct hbm_client_connect_request *disconnect_req) |
| 739 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 740 | struct mei_cl *cl; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 741 | struct mei_cl_cb *cb; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 742 | |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 743 | cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); |
| 744 | if (cl) { |
Tomas Winkler | 3c66618 | 2015-05-04 09:43:52 +0300 | [diff] [blame] | 745 | cl_dbg(dev, cl, "fw disconnect request received\n"); |
| 746 | cl->state = MEI_FILE_DISCONNECTING; |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 747 | cl->timer_count = 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 748 | |
Tomas Winkler | bca67d6 | 2015-02-10 10:39:43 +0200 | [diff] [blame] | 749 | cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT_RSP, NULL); |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 750 | if (!cb) |
| 751 | return -ENOMEM; |
Tomas Winkler | 2af89db | 2014-08-21 14:29:20 +0300 | [diff] [blame] | 752 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
| 753 | list_add(&cb->list, &dev->ctrl_wr_list.list); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 754 | } |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 755 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 756 | } |
| 757 | |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 758 | /** |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 759 | * mei_hbm_config_features - check what hbm features and commands |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 760 | * are supported by the fw |
| 761 | * |
| 762 | * @dev: the device structure |
| 763 | */ |
| 764 | static void mei_hbm_config_features(struct mei_device *dev) |
| 765 | { |
| 766 | /* Power Gating Isolation Support */ |
| 767 | dev->hbm_f_pg_supported = 0; |
| 768 | if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) |
| 769 | dev->hbm_f_pg_supported = 1; |
| 770 | |
| 771 | if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && |
| 772 | dev->version.minor_version >= HBM_MINOR_VERSION_PGI) |
| 773 | dev->hbm_f_pg_supported = 1; |
Tomas Winkler | 70ef835 | 2015-07-23 21:37:12 +0300 | [diff] [blame] | 774 | |
| 775 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DC) |
| 776 | dev->hbm_f_dc_supported = 1; |
Alexander Usyskin | 18901357 | 2015-07-23 21:37:13 +0300 | [diff] [blame^] | 777 | |
| 778 | /* disconnect on connect timeout instead of link reset */ |
| 779 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT) |
| 780 | dev->hbm_f_dot_supported = 1; |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 781 | } |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 782 | |
| 783 | /** |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 784 | * mei_hbm_version_is_supported - checks whether the driver can |
| 785 | * support the hbm version of the device |
| 786 | * |
| 787 | * @dev: the device structure |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 788 | * Return: true if driver can support hbm version of the device |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 789 | */ |
| 790 | bool mei_hbm_version_is_supported(struct mei_device *dev) |
| 791 | { |
| 792 | return (dev->version.major_version < HBM_MAJOR_VERSION) || |
| 793 | (dev->version.major_version == HBM_MAJOR_VERSION && |
| 794 | dev->version.minor_version <= HBM_MINOR_VERSION); |
| 795 | } |
| 796 | |
| 797 | /** |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 798 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 799 | * handle the read bus message cmd processing. |
| 800 | * |
| 801 | * @dev: the device structure |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 802 | * @hdr: header of bus message |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 803 | * |
Alexander Usyskin | a8605ea | 2014-09-29 16:31:49 +0300 | [diff] [blame] | 804 | * Return: 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 805 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 806 | 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] | 807 | { |
| 808 | struct mei_bus_message *mei_msg; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 809 | struct hbm_host_version_response *version_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 810 | struct hbm_props_response *props_res; |
| 811 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | 70ef835 | 2015-07-23 21:37:12 +0300 | [diff] [blame] | 812 | struct hbm_add_client_request *add_cl_req; |
| 813 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 814 | |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 815 | struct mei_hbm_cl_cmd *cl_cmd; |
| 816 | struct hbm_client_connect_request *disconnect_req; |
| 817 | struct hbm_flow_control *flow_control; |
| 818 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 819 | /* read the message to our buffer */ |
| 820 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 821 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 822 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 823 | cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 824 | |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 825 | /* ignore spurious message and prevent reset nesting |
| 826 | * hbm is put to idle during system reset |
| 827 | */ |
| 828 | if (dev->hbm_state == MEI_HBM_IDLE) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 829 | dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n"); |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 830 | return 0; |
| 831 | } |
| 832 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 833 | switch (mei_msg->hbm_cmd) { |
| 834 | case HOST_START_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 835 | dev_dbg(dev->dev, "hbm: start: response message received.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 836 | |
| 837 | dev->init_clients_timer = 0; |
| 838 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 839 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 840 | |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 841 | 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] | 842 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
| 843 | version_res->me_max_version.major_version, |
| 844 | version_res->me_max_version.minor_version); |
| 845 | |
| 846 | if (version_res->host_version_supported) { |
| 847 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 848 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 849 | } else { |
| 850 | dev->version.major_version = |
| 851 | version_res->me_max_version.major_version; |
| 852 | dev->version.minor_version = |
| 853 | version_res->me_max_version.minor_version; |
| 854 | } |
| 855 | |
| 856 | if (!mei_hbm_version_is_supported(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 857 | dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 858 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 859 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 860 | if (mei_hbm_stop_req(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 861 | dev_err(dev->dev, "hbm: start: failed to send stop request\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 862 | return -EIO; |
| 863 | } |
| 864 | break; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 865 | } |
| 866 | |
Tomas Winkler | bae1cc7 | 2014-08-21 14:29:21 +0300 | [diff] [blame] | 867 | mei_hbm_config_features(dev); |
| 868 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 869 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 870 | dev->hbm_state != MEI_HBM_STARTING) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 871 | dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 872 | dev->dev_state, dev->hbm_state); |
| 873 | return -EPROTO; |
| 874 | } |
| 875 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 876 | if (mei_hbm_enum_clients_req(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 877 | dev_err(dev->dev, "hbm: start: failed to send enumeration request\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 878 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 879 | } |
| 880 | |
Alexander Usyskin | cb02efc | 2014-08-21 14:29:19 +0300 | [diff] [blame] | 881 | wake_up(&dev->wait_hbm_start); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 882 | break; |
| 883 | |
| 884 | case CLIENT_CONNECT_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 885 | dev_dbg(dev->dev, "hbm: client connect response: message received.\n"); |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 886 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 887 | break; |
| 888 | |
| 889 | case CLIENT_DISCONNECT_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 890 | dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n"); |
Tomas Winkler | 12f45ed | 2014-08-21 14:29:18 +0300 | [diff] [blame] | 891 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 892 | break; |
| 893 | |
| 894 | case MEI_FLOW_CONTROL_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 895 | dev_dbg(dev->dev, "hbm: client flow control response: message received.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 896 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 897 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 898 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 899 | break; |
| 900 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 901 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 902 | dev_dbg(dev->dev, "power gate isolation entry response received\n"); |
Tomas Winkler | ba9cdd0 | 2014-03-18 22:52:00 +0200 | [diff] [blame] | 903 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 904 | if (waitqueue_active(&dev->wait_pg)) |
| 905 | wake_up(&dev->wait_pg); |
| 906 | break; |
| 907 | |
| 908 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 909 | dev_dbg(dev->dev, "power gate isolation exit request received\n"); |
Tomas Winkler | ba9cdd0 | 2014-03-18 22:52:00 +0200 | [diff] [blame] | 910 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 911 | if (waitqueue_active(&dev->wait_pg)) |
| 912 | wake_up(&dev->wait_pg); |
Tomas Winkler | 180ea05 | 2014-03-18 22:52:02 +0200 | [diff] [blame] | 913 | else |
| 914 | /* |
| 915 | * If the driver is not waiting on this then |
| 916 | * this is HW initiated exit from PG. |
| 917 | * Start runtime pm resume sequence to exit from PG. |
| 918 | */ |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 919 | pm_request_resume(dev->dev); |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 920 | break; |
| 921 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 922 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 923 | dev_dbg(dev->dev, "hbm: properties response: message received.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 924 | |
| 925 | dev->init_clients_timer = 0; |
| 926 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 927 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 928 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 929 | dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 930 | dev->dev_state, dev->hbm_state); |
| 931 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 932 | } |
| 933 | |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 934 | props_res = (struct hbm_props_response *)mei_msg; |
| 935 | |
| 936 | if (props_res->status) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 937 | dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n", |
Tomas Winkler | 89778d6 | 2014-08-21 14:29:16 +0300 | [diff] [blame] | 938 | props_res->status, |
| 939 | mei_hbm_status_str(props_res->status)); |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 940 | return -EPROTO; |
| 941 | } |
| 942 | |
| 943 | mei_hbm_me_cl_add(dev, props_res); |
| 944 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 945 | dev->me_client_index++; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 946 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 947 | /* request property for the next client */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 948 | if (mei_hbm_prop_req(dev)) |
| 949 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 950 | |
| 951 | break; |
| 952 | |
| 953 | case HOST_ENUM_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 954 | dev_dbg(dev->dev, "hbm: enumeration response: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 955 | |
| 956 | dev->init_clients_timer = 0; |
| 957 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 958 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
Tomas Winkler | 23f5a32 | 2013-09-02 03:11:01 +0300 | [diff] [blame] | 959 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
| 960 | < sizeof(enum_res->valid_addresses)); |
| 961 | memcpy(dev->me_clients_map, enum_res->valid_addresses, |
Tomas Winkler | 5ca2d38 | 2014-08-21 14:29:13 +0300 | [diff] [blame] | 962 | sizeof(enum_res->valid_addresses)); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 963 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 964 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 965 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 966 | dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 967 | dev->dev_state, dev->hbm_state); |
| 968 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 969 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 970 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 971 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
| 972 | |
| 973 | /* first property request */ |
| 974 | if (mei_hbm_prop_req(dev)) |
| 975 | return -EIO; |
| 976 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 977 | break; |
| 978 | |
| 979 | case HOST_STOP_RES_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 980 | dev_dbg(dev->dev, "hbm: stop response: message received\n"); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 981 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 982 | dev->init_clients_timer = 0; |
| 983 | |
| 984 | if (dev->hbm_state != MEI_HBM_STOPPED) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 985 | dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 986 | dev->dev_state, dev->hbm_state); |
| 987 | return -EPROTO; |
| 988 | } |
| 989 | |
Tomas Winkler | 33ec082 | 2014-01-12 00:36:09 +0200 | [diff] [blame] | 990 | dev->dev_state = MEI_DEV_POWER_DOWN; |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 991 | dev_info(dev->dev, "hbm: stop response: resetting.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 992 | /* force the reset */ |
| 993 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 994 | break; |
| 995 | |
| 996 | case CLIENT_DISCONNECT_REQ_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 997 | dev_dbg(dev->dev, "hbm: disconnect request: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 998 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 999 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 1000 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 1001 | break; |
| 1002 | |
| 1003 | case ME_STOP_REQ_CMD: |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 1004 | dev_dbg(dev->dev, "hbm: stop request: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 1005 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 1006 | if (mei_hbm_stop_req(dev)) { |
Tomas Winkler | 2bf94cab | 2014-09-29 16:31:42 +0300 | [diff] [blame] | 1007 | 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] | 1008 | return -EIO; |
| 1009 | } |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 1010 | break; |
Tomas Winkler | 70ef835 | 2015-07-23 21:37:12 +0300 | [diff] [blame] | 1011 | |
| 1012 | case MEI_HBM_ADD_CLIENT_REQ_CMD: |
| 1013 | dev_dbg(dev->dev, "hbm: add client request received\n"); |
| 1014 | /* |
| 1015 | * after the host receives the enum_resp |
| 1016 | * message clients may be added or removed |
| 1017 | */ |
| 1018 | if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS && |
| 1019 | dev->hbm_state >= MEI_HBM_STOPPED) { |
| 1020 | dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n", |
| 1021 | dev->dev_state, dev->hbm_state); |
| 1022 | return -EPROTO; |
| 1023 | } |
| 1024 | add_cl_req = (struct hbm_add_client_request *)mei_msg; |
| 1025 | ret = mei_hbm_fw_add_cl_req(dev, add_cl_req); |
| 1026 | if (ret) { |
| 1027 | dev_err(dev->dev, "hbm: add client: failed to send response %d\n", |
| 1028 | ret); |
| 1029 | return -EIO; |
| 1030 | } |
| 1031 | dev_dbg(dev->dev, "hbm: add client request processed\n"); |
| 1032 | break; |
| 1033 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 1034 | default: |
| 1035 | BUG(); |
| 1036 | break; |
| 1037 | |
| 1038 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 1039 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 1040 | } |
| 1041 | |