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/pci.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/wait.h> |
| 21 | #include <linux/mei.h> |
Tomas Winkler | 180ea05 | 2014-03-18 22:52:02 +0200 | [diff] [blame] | 22 | #include <linux/pm_runtime.h> |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 23 | |
| 24 | #include "mei_dev.h" |
Tomas Winkler | 0edb23f | 2013-01-08 23:07:12 +0200 | [diff] [blame] | 25 | #include "hbm.h" |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 26 | #include "client.h" |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 27 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 28 | static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) |
| 29 | { |
| 30 | #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status |
| 31 | switch (status) { |
| 32 | MEI_CL_CS(SUCCESS); |
| 33 | MEI_CL_CS(NOT_FOUND); |
| 34 | MEI_CL_CS(ALREADY_STARTED); |
| 35 | MEI_CL_CS(OUT_OF_RESOURCES); |
| 36 | MEI_CL_CS(MESSAGE_SMALL); |
| 37 | default: return "unknown"; |
| 38 | } |
| 39 | #undef MEI_CL_CCS |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * mei_cl_conn_status_to_errno - convert client connect response |
| 44 | * status to error code |
| 45 | * |
| 46 | * @status: client connect response status |
| 47 | * |
| 48 | * returns corresponding error code |
| 49 | */ |
| 50 | static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) |
| 51 | { |
| 52 | switch (status) { |
| 53 | case MEI_CL_CONN_SUCCESS: return 0; |
| 54 | case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; |
| 55 | case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; |
| 56 | case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; |
| 57 | case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; |
| 58 | default: return -EINVAL; |
| 59 | } |
| 60 | } |
| 61 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 62 | /** |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame^] | 63 | * mei_hbm_idle - set hbm to idle state |
| 64 | * |
| 65 | * @dev: the device structure |
| 66 | */ |
| 67 | void mei_hbm_idle(struct mei_device *dev) |
| 68 | { |
| 69 | dev->init_clients_timer = 0; |
| 70 | dev->hbm_state = MEI_HBM_IDLE; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * mei_hbm_reset - reset hbm counters and book keeping data structurs |
| 75 | * |
| 76 | * @dev: the device structure |
| 77 | */ |
| 78 | void mei_hbm_reset(struct mei_device *dev) |
| 79 | { |
| 80 | dev->me_clients_num = 0; |
| 81 | dev->me_client_presentation_num = 0; |
| 82 | dev->me_client_index = 0; |
| 83 | |
| 84 | kfree(dev->me_clients); |
| 85 | dev->me_clients = NULL; |
| 86 | |
| 87 | mei_hbm_idle(dev); |
| 88 | } |
| 89 | |
| 90 | /** |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 91 | * mei_hbm_me_cl_allocate - allocates storage for me clients |
| 92 | * |
| 93 | * @dev: the device structure |
| 94 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 95 | * returns 0 on success -ENOMEM on allocation failure |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 96 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 97 | static int mei_hbm_me_cl_allocate(struct mei_device *dev) |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 98 | { |
| 99 | struct mei_me_client *clients; |
| 100 | int b; |
| 101 | |
Tomas Winkler | 84b3294 | 2014-05-07 16:51:28 +0300 | [diff] [blame^] | 102 | mei_hbm_reset(dev); |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 103 | |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 104 | /* count how many ME clients we have */ |
| 105 | for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX) |
| 106 | dev->me_clients_num++; |
| 107 | |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 108 | if (dev->me_clients_num == 0) |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 109 | return 0; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 110 | |
Tomas Winkler | e19555c | 2013-09-02 03:11:03 +0300 | [diff] [blame] | 111 | dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%ld.\n", |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 112 | dev->me_clients_num * sizeof(struct mei_me_client)); |
| 113 | /* allocate storage for ME clients representation */ |
| 114 | clients = kcalloc(dev->me_clients_num, |
| 115 | sizeof(struct mei_me_client), GFP_KERNEL); |
| 116 | if (!clients) { |
| 117 | dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 118 | return -ENOMEM; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 119 | } |
| 120 | dev->me_clients = clients; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 121 | return 0; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | /** |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 125 | * mei_hbm_cl_hdr - construct client hbm header |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 126 | * |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 127 | * @cl: - client |
| 128 | * @hbm_cmd: host bus message command |
| 129 | * @buf: buffer for cl header |
| 130 | * @len: buffer length |
| 131 | */ |
| 132 | static inline |
| 133 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) |
| 134 | { |
| 135 | struct mei_hbm_cl_cmd *cmd = buf; |
| 136 | |
| 137 | memset(cmd, 0, len); |
| 138 | |
| 139 | cmd->hbm_cmd = hbm_cmd; |
| 140 | cmd->host_addr = cl->host_client_id; |
| 141 | cmd->me_addr = cl->me_client_id; |
| 142 | } |
| 143 | |
| 144 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 145 | * mei_hbm_cl_addr_equal - tells if they have the same address |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 146 | * |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 147 | * @cl: - client |
| 148 | * @buf: buffer with cl header |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 149 | * |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 150 | * returns true if addresses are the same |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 151 | */ |
| 152 | static inline |
| 153 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) |
| 154 | { |
| 155 | struct mei_hbm_cl_cmd *cmd = buf; |
| 156 | return cl->host_client_id == cmd->host_addr && |
| 157 | cl->me_client_id == cmd->me_addr; |
| 158 | } |
| 159 | |
| 160 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 161 | int mei_hbm_start_wait(struct mei_device *dev) |
| 162 | { |
| 163 | int ret; |
| 164 | if (dev->hbm_state > MEI_HBM_START) |
| 165 | return 0; |
| 166 | |
| 167 | mutex_unlock(&dev->device_lock); |
| 168 | ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, |
| 169 | dev->hbm_state == MEI_HBM_IDLE || |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 170 | dev->hbm_state >= MEI_HBM_STARTED, |
Tomas Winkler | 7d93e58 | 2014-01-14 23:10:10 +0200 | [diff] [blame] | 171 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 172 | mutex_lock(&dev->device_lock); |
| 173 | |
| 174 | if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) { |
| 175 | dev->hbm_state = MEI_HBM_IDLE; |
Masanari Iida | 8b513d0 | 2013-05-21 23:13:12 +0900 | [diff] [blame] | 176 | dev_err(&dev->pdev->dev, "waiting for mei start failed\n"); |
Alexander Usyskin | 7ca96aa | 2014-02-19 17:35:49 +0200 | [diff] [blame] | 177 | return -ETIME; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 178 | } |
| 179 | return 0; |
| 180 | } |
| 181 | |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 182 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 183 | * mei_hbm_start_req - sends start request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 184 | * |
| 185 | * @dev: the device structure |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 186 | * |
| 187 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 188 | */ |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 189 | int mei_hbm_start_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 190 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 191 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 192 | struct hbm_host_version_request *start_req; |
| 193 | const size_t len = sizeof(struct hbm_host_version_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 194 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 195 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 196 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 197 | |
| 198 | /* host start message */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 199 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 200 | memset(start_req, 0, len); |
| 201 | start_req->hbm_cmd = HOST_START_REQ_CMD; |
| 202 | start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 203 | start_req->host_version.minor_version = HBM_MINOR_VERSION; |
| 204 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 205 | dev->hbm_state = MEI_HBM_IDLE; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 206 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 207 | if (ret) { |
| 208 | dev_err(&dev->pdev->dev, "version message write failed: ret = %d\n", |
| 209 | ret); |
| 210 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 211 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 212 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 213 | dev->hbm_state = MEI_HBM_START; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 214 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 215 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 216 | } |
| 217 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 218 | /* |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 219 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 220 | * |
| 221 | * @dev: the device structure |
| 222 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 223 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 224 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 225 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 226 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 227 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 228 | struct hbm_host_enum_request *enum_req; |
| 229 | const size_t len = sizeof(struct hbm_host_enum_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 230 | int ret; |
| 231 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 232 | /* enumerate clients */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 233 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 234 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 235 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
| 236 | memset(enum_req, 0, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 237 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
| 238 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 239 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 240 | if (ret) { |
| 241 | dev_err(&dev->pdev->dev, "enumeration request write failed: ret = %d.\n", |
| 242 | ret); |
| 243 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 244 | } |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 245 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 246 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 247 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 248 | } |
| 249 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 250 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 251 | * mei_hbm_prop_req - request property for a single client |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 252 | * |
| 253 | * @dev: the device structure |
| 254 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 255 | * returns 0 on success and < 0 on failure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 256 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 257 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 258 | static int mei_hbm_prop_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 259 | { |
| 260 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 261 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 262 | struct hbm_props_request *prop_req; |
| 263 | const size_t len = sizeof(struct hbm_props_request); |
| 264 | unsigned long next_client_index; |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 265 | unsigned long client_num; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 266 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 267 | |
| 268 | client_num = dev->me_client_presentation_num; |
| 269 | |
| 270 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
| 271 | dev->me_client_index); |
| 272 | |
| 273 | /* We got all client properties */ |
| 274 | if (next_client_index == MEI_CLIENTS_MAX) { |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 275 | dev->hbm_state = MEI_HBM_STARTED; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 276 | schedule_work(&dev->init_work); |
| 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | dev->me_clients[client_num].client_id = next_client_index; |
| 282 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; |
| 283 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 284 | mei_hbm_hdr(mei_hdr, len); |
| 285 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 286 | |
| 287 | memset(prop_req, 0, sizeof(struct hbm_props_request)); |
| 288 | |
| 289 | |
| 290 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
| 291 | prop_req->address = next_client_index; |
| 292 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 293 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 294 | if (ret) { |
| 295 | dev_err(&dev->pdev->dev, "properties request write failed: ret = %d\n", |
| 296 | ret); |
| 297 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 301 | dev->me_client_index = next_client_index; |
| 302 | |
| 303 | return 0; |
| 304 | } |
| 305 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 306 | /* |
| 307 | * mei_hbm_pg - sends pg command |
| 308 | * |
| 309 | * @dev: the device structure |
| 310 | * @pg_cmd: the pg command code |
| 311 | * |
| 312 | * This function returns -EIO on write failure |
| 313 | */ |
| 314 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) |
| 315 | { |
| 316 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 317 | struct hbm_power_gate *req; |
| 318 | const size_t len = sizeof(struct hbm_power_gate); |
| 319 | int ret; |
| 320 | |
| 321 | mei_hbm_hdr(mei_hdr, len); |
| 322 | |
| 323 | req = (struct hbm_power_gate *)dev->wr_msg.data; |
| 324 | memset(req, 0, len); |
| 325 | req->hbm_cmd = pg_cmd; |
| 326 | |
| 327 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 328 | if (ret) |
| 329 | dev_err(&dev->pdev->dev, "power gate command write failed.\n"); |
| 330 | return ret; |
| 331 | } |
| 332 | EXPORT_SYMBOL_GPL(mei_hbm_pg); |
| 333 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 334 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 335 | * mei_hbm_stop_req - send stop request message |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 336 | * |
| 337 | * @dev - mei device |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 338 | * @cl: client info |
| 339 | * |
| 340 | * This function returns -EIO on write failure |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 341 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 342 | static int mei_hbm_stop_req(struct mei_device *dev) |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 343 | { |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 344 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 345 | struct hbm_host_stop_request *req = |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 346 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 347 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 348 | |
| 349 | mei_hbm_hdr(mei_hdr, len); |
| 350 | |
| 351 | memset(req, 0, len); |
| 352 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 353 | req->reason = DRIVER_STOP_REQUEST; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 354 | |
| 355 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 359 | * mei_hbm_cl_flow_control_req - sends flow control request. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 360 | * |
| 361 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 362 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 363 | * |
| 364 | * This function returns -EIO on write failure |
| 365 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 366 | 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] | 367 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 368 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 369 | const size_t len = sizeof(struct hbm_flow_control); |
| 370 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 371 | mei_hbm_hdr(mei_hdr, len); |
| 372 | mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 373 | |
Tomas Winkler | 4692218 | 2014-03-16 14:35:55 +0200 | [diff] [blame] | 374 | cl_dbg(dev, cl, "sending flow control\n"); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 375 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 376 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 380 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 381 | * |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 382 | * @dev: the device structure |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 383 | * @flow: flow control. |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 384 | * |
| 385 | * return 0 on success, < 0 otherwise |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 386 | */ |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 387 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 388 | struct hbm_flow_control *flow) |
| 389 | { |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 390 | struct mei_me_client *me_cl; |
| 391 | int id; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 392 | |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 393 | id = mei_me_cl_by_id(dev, flow->me_addr); |
| 394 | if (id < 0) { |
| 395 | dev_err(&dev->pdev->dev, "no such me client %d\n", |
| 396 | flow->me_addr); |
| 397 | return id; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 398 | } |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 399 | |
| 400 | me_cl = &dev->me_clients[id]; |
| 401 | if (me_cl->props.single_recv_buf) { |
| 402 | me_cl->mei_flow_ctrl_creds++; |
| 403 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", |
| 404 | flow->me_addr); |
| 405 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", |
| 406 | me_cl->mei_flow_ctrl_creds); |
| 407 | } else { |
| 408 | BUG(); /* error in flow control */ |
| 409 | } |
| 410 | |
| 411 | return 0; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | /** |
| 415 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 416 | * |
| 417 | * @dev: the device structure |
| 418 | * @flow_control: flow control response bus message |
| 419 | */ |
| 420 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
| 421 | struct hbm_flow_control *flow_control) |
| 422 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 423 | struct mei_cl *cl; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 424 | |
| 425 | if (!flow_control->host_addr) { |
| 426 | /* single receive buffer */ |
| 427 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 428 | return; |
| 429 | } |
| 430 | |
| 431 | /* normal connection */ |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 432 | list_for_each_entry(cl, &dev->file_list, link) { |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 433 | if (mei_hbm_cl_addr_equal(cl, flow_control)) { |
| 434 | cl->mei_flow_ctrl_creds++; |
| 435 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", |
| 436 | flow_control->host_addr, flow_control->me_addr); |
| 437 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", |
| 438 | cl->mei_flow_ctrl_creds); |
| 439 | break; |
| 440 | } |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | |
| 445 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 446 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 447 | * |
| 448 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 449 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 450 | * |
| 451 | * This function returns -EIO on write failure |
| 452 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 453 | 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] | 454 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 455 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 456 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 457 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 458 | mei_hbm_hdr(mei_hdr, len); |
| 459 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 460 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 461 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 465 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW |
| 466 | * |
| 467 | * @dev: the device structure |
| 468 | * @cl: a client to disconnect from |
| 469 | * |
| 470 | * This function returns -EIO on write failure |
| 471 | */ |
| 472 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) |
| 473 | { |
| 474 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 475 | const size_t len = sizeof(struct hbm_client_connect_response); |
| 476 | |
| 477 | mei_hbm_hdr(mei_hdr, len); |
| 478 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, dev->wr_msg.data, len); |
| 479 | |
| 480 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 481 | } |
| 482 | |
| 483 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 484 | * mei_hbm_cl_disconnect_res - disconnect response from ME |
| 485 | * |
| 486 | * @dev: the device structure |
| 487 | * @rs: disconnect response bus message |
| 488 | */ |
| 489 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, |
| 490 | struct hbm_client_connect_response *rs) |
| 491 | { |
| 492 | struct mei_cl *cl; |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 493 | struct mei_cl_cb *cb, *next; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 494 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 495 | dev_dbg(&dev->pdev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n", |
| 496 | rs->me_addr, rs->host_addr, rs->status); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 497 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 498 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
| 499 | cl = cb->cl; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 500 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 501 | /* this should not happen */ |
| 502 | if (WARN_ON(!cl)) { |
| 503 | list_del(&cb->list); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 504 | return; |
| 505 | } |
| 506 | |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 507 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 508 | list_del(&cb->list); |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 509 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 510 | cl->state = MEI_FILE_DISCONNECTED; |
| 511 | |
| 512 | cl->status = 0; |
| 513 | cl->timer_count = 0; |
| 514 | break; |
| 515 | } |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 520 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 521 | * |
| 522 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 523 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 524 | * |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 525 | * returns -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 526 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 527 | 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] | 528 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 529 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 530 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 531 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 532 | mei_hbm_hdr(mei_hdr, len); |
| 533 | mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 534 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 535 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 539 | * mei_hbm_cl_connect_res - connect response from the ME |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 540 | * |
| 541 | * @dev: the device structure |
| 542 | * @rs: connect response bus message |
| 543 | */ |
| 544 | static void mei_hbm_cl_connect_res(struct mei_device *dev, |
| 545 | struct hbm_client_connect_response *rs) |
| 546 | { |
| 547 | |
| 548 | struct mei_cl *cl; |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 549 | struct mei_cl_cb *cb, *next; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 550 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 551 | dev_dbg(&dev->pdev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n", |
| 552 | rs->me_addr, rs->host_addr, |
| 553 | mei_cl_conn_status_str(rs->status)); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 554 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 555 | cl = NULL; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 556 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 557 | 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] | 558 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 559 | cl = cb->cl; |
| 560 | /* this should not happen */ |
| 561 | if (WARN_ON(!cl)) { |
| 562 | list_del_init(&cb->list); |
| 563 | continue; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 564 | } |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 565 | |
| 566 | if (cb->fop_type != MEI_FOP_CONNECT) |
| 567 | continue; |
| 568 | |
| 569 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 570 | list_del(&cb->list); |
| 571 | break; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 572 | } |
| 573 | } |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 574 | |
| 575 | if (!cl) |
| 576 | return; |
| 577 | |
| 578 | cl->timer_count = 0; |
| 579 | if (rs->status == MEI_CL_CONN_SUCCESS) |
| 580 | cl->state = MEI_FILE_CONNECTED; |
| 581 | else |
| 582 | cl->state = MEI_FILE_DISCONNECTED; |
| 583 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | |
| 587 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 588 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
| 589 | * host sends disconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 590 | * |
| 591 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 592 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 593 | * |
| 594 | * returns -ENOMEM on allocation failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 595 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 596 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 597 | struct hbm_client_connect_request *disconnect_req) |
| 598 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 599 | struct mei_cl *cl; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 600 | struct mei_cl_cb *cb; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 601 | |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 602 | list_for_each_entry(cl, &dev->file_list, link) { |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 603 | if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 604 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", |
| 605 | disconnect_req->host_addr, |
| 606 | disconnect_req->me_addr); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 607 | cl->state = MEI_FILE_DISCONNECTED; |
| 608 | cl->timer_count = 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 609 | |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 610 | cb = mei_io_cb_init(cl, NULL); |
| 611 | if (!cb) |
| 612 | return -ENOMEM; |
| 613 | cb->fop_type = MEI_FOP_DISCONNECT_RSP; |
| 614 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
| 615 | list_add(&cb->list, &dev->ctrl_wr_list.list); |
| 616 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 617 | break; |
| 618 | } |
| 619 | } |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 620 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | |
| 624 | /** |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 625 | * mei_hbm_version_is_supported - checks whether the driver can |
| 626 | * support the hbm version of the device |
| 627 | * |
| 628 | * @dev: the device structure |
| 629 | * returns true if driver can support hbm version of the device |
| 630 | */ |
| 631 | bool mei_hbm_version_is_supported(struct mei_device *dev) |
| 632 | { |
| 633 | return (dev->version.major_version < HBM_MAJOR_VERSION) || |
| 634 | (dev->version.major_version == HBM_MAJOR_VERSION && |
| 635 | dev->version.minor_version <= HBM_MINOR_VERSION); |
| 636 | } |
| 637 | |
| 638 | /** |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 639 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 640 | * handle the read bus message cmd processing. |
| 641 | * |
| 642 | * @dev: the device structure |
| 643 | * @mei_hdr: header of bus message |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 644 | * |
| 645 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 646 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 647 | 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] | 648 | { |
| 649 | struct mei_bus_message *mei_msg; |
| 650 | struct mei_me_client *me_client; |
| 651 | struct hbm_host_version_response *version_res; |
| 652 | struct hbm_client_connect_response *connect_res; |
| 653 | struct hbm_client_connect_response *disconnect_res; |
| 654 | struct hbm_client_connect_request *disconnect_req; |
| 655 | struct hbm_flow_control *flow_control; |
| 656 | struct hbm_props_response *props_res; |
| 657 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 658 | |
| 659 | /* read the message to our buffer */ |
| 660 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 661 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 662 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
| 663 | |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 664 | /* ignore spurious message and prevent reset nesting |
| 665 | * hbm is put to idle during system reset |
| 666 | */ |
| 667 | if (dev->hbm_state == MEI_HBM_IDLE) { |
| 668 | dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n"); |
| 669 | return 0; |
| 670 | } |
| 671 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 672 | switch (mei_msg->hbm_cmd) { |
| 673 | case HOST_START_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 674 | dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n"); |
| 675 | |
| 676 | dev->init_clients_timer = 0; |
| 677 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 678 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 679 | |
| 680 | dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
| 681 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
| 682 | version_res->me_max_version.major_version, |
| 683 | version_res->me_max_version.minor_version); |
| 684 | |
| 685 | if (version_res->host_version_supported) { |
| 686 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 687 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 688 | } else { |
| 689 | dev->version.major_version = |
| 690 | version_res->me_max_version.major_version; |
| 691 | dev->version.minor_version = |
| 692 | version_res->me_max_version.minor_version; |
| 693 | } |
| 694 | |
| 695 | if (!mei_hbm_version_is_supported(dev)) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 696 | dev_warn(&dev->pdev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 697 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 698 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 699 | if (mei_hbm_stop_req(dev)) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 700 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
| 701 | return -EIO; |
| 702 | } |
| 703 | break; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 704 | } |
| 705 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 706 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 707 | dev->hbm_state != MEI_HBM_START) { |
| 708 | dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
| 709 | dev->dev_state, dev->hbm_state); |
| 710 | return -EPROTO; |
| 711 | } |
| 712 | |
| 713 | dev->hbm_state = MEI_HBM_STARTED; |
| 714 | |
| 715 | if (mei_hbm_enum_clients_req(dev)) { |
| 716 | dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n"); |
| 717 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 718 | } |
| 719 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 720 | wake_up_interruptible(&dev->wait_recvd_msg); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 721 | break; |
| 722 | |
| 723 | case CLIENT_CONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 724 | dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n"); |
| 725 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 726 | connect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 727 | mei_hbm_cl_connect_res(dev, connect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 728 | wake_up(&dev->wait_recvd_msg); |
| 729 | break; |
| 730 | |
| 731 | case CLIENT_DISCONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 732 | dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n"); |
| 733 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 734 | disconnect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 735 | mei_hbm_cl_disconnect_res(dev, disconnect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 736 | wake_up(&dev->wait_recvd_msg); |
| 737 | break; |
| 738 | |
| 739 | case MEI_FLOW_CONTROL_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 740 | dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n"); |
| 741 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 742 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 743 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 744 | break; |
| 745 | |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 746 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
| 747 | dev_dbg(&dev->pdev->dev, "power gate isolation entry response received\n"); |
Tomas Winkler | ba9cdd0 | 2014-03-18 22:52:00 +0200 | [diff] [blame] | 748 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 749 | if (waitqueue_active(&dev->wait_pg)) |
| 750 | wake_up(&dev->wait_pg); |
| 751 | break; |
| 752 | |
| 753 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: |
| 754 | dev_dbg(&dev->pdev->dev, "power gate isolation exit request received\n"); |
Tomas Winkler | ba9cdd0 | 2014-03-18 22:52:00 +0200 | [diff] [blame] | 755 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 756 | if (waitqueue_active(&dev->wait_pg)) |
| 757 | wake_up(&dev->wait_pg); |
Tomas Winkler | 180ea05 | 2014-03-18 22:52:02 +0200 | [diff] [blame] | 758 | else |
| 759 | /* |
| 760 | * If the driver is not waiting on this then |
| 761 | * this is HW initiated exit from PG. |
| 762 | * Start runtime pm resume sequence to exit from PG. |
| 763 | */ |
| 764 | pm_request_resume(&dev->pdev->dev); |
Tomas Winkler | 4fcbc99 | 2014-03-18 22:51:55 +0200 | [diff] [blame] | 765 | break; |
| 766 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 767 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 768 | dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n"); |
| 769 | |
| 770 | dev->init_clients_timer = 0; |
| 771 | |
| 772 | if (dev->me_clients == NULL) { |
| 773 | dev_err(&dev->pdev->dev, "hbm: properties response: mei_clients not allocated\n"); |
| 774 | return -EPROTO; |
| 775 | } |
| 776 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 777 | props_res = (struct hbm_props_response *)mei_msg; |
| 778 | me_client = &dev->me_clients[dev->me_client_presentation_num]; |
| 779 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 780 | if (props_res->status) { |
| 781 | dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n", |
| 782 | props_res->status); |
| 783 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 784 | } |
| 785 | |
| 786 | if (me_client->client_id != props_res->address) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 787 | dev_err(&dev->pdev->dev, "hbm: properties response: address mismatch %d ?= %d\n", |
| 788 | me_client->client_id, props_res->address); |
| 789 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 793 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 794 | dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
| 795 | dev->dev_state, dev->hbm_state); |
| 796 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | me_client->props = props_res->client_properties; |
| 800 | dev->me_client_index++; |
| 801 | dev->me_client_presentation_num++; |
| 802 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 803 | /* request property for the next client */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 804 | if (mei_hbm_prop_req(dev)) |
| 805 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 806 | |
| 807 | break; |
| 808 | |
| 809 | case HOST_ENUM_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 810 | dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n"); |
| 811 | |
| 812 | dev->init_clients_timer = 0; |
| 813 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 814 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
Tomas Winkler | 23f5a32 | 2013-09-02 03:11:01 +0300 | [diff] [blame] | 815 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
| 816 | < sizeof(enum_res->valid_addresses)); |
| 817 | memcpy(dev->me_clients_map, enum_res->valid_addresses, |
| 818 | sizeof(enum_res->valid_addresses)); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 819 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 820 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 821 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { |
| 822 | dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
| 823 | dev->dev_state, dev->hbm_state); |
| 824 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 825 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 826 | |
| 827 | if (mei_hbm_me_cl_allocate(dev)) { |
| 828 | dev_err(&dev->pdev->dev, "hbm: enumeration response: cannot allocate clients array\n"); |
| 829 | return -ENOMEM; |
| 830 | } |
| 831 | |
| 832 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
| 833 | |
| 834 | /* first property request */ |
| 835 | if (mei_hbm_prop_req(dev)) |
| 836 | return -EIO; |
| 837 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 838 | break; |
| 839 | |
| 840 | case HOST_STOP_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 841 | dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n"); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 842 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 843 | dev->init_clients_timer = 0; |
| 844 | |
| 845 | if (dev->hbm_state != MEI_HBM_STOPPED) { |
| 846 | dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
| 847 | dev->dev_state, dev->hbm_state); |
| 848 | return -EPROTO; |
| 849 | } |
| 850 | |
Tomas Winkler | 33ec082 | 2014-01-12 00:36:09 +0200 | [diff] [blame] | 851 | dev->dev_state = MEI_DEV_POWER_DOWN; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 852 | dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n"); |
| 853 | /* force the reset */ |
| 854 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 855 | break; |
| 856 | |
| 857 | case CLIENT_DISCONNECT_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 858 | dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n"); |
| 859 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 860 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 861 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 862 | break; |
| 863 | |
| 864 | case ME_STOP_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 865 | dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 866 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 867 | if (mei_hbm_stop_req(dev)) { |
| 868 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
| 869 | return -EIO; |
| 870 | } |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 871 | break; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 872 | default: |
| 873 | BUG(); |
| 874 | break; |
| 875 | |
| 876 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 877 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 878 | } |
| 879 | |