Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Intel Management Engine Interface (Intel MEI) Linux driver |
| 4 | * Copyright (c) 2003-2012, Intel Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/pci.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/wait.h> |
| 20 | #include <linux/mei.h> |
| 21 | |
| 22 | #include "mei_dev.h" |
Tomas Winkler | 0edb23f | 2013-01-08 23:07:12 +0200 | [diff] [blame] | 23 | #include "hbm.h" |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 24 | #include "client.h" |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 25 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 26 | static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) |
| 27 | { |
| 28 | #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status |
| 29 | switch (status) { |
| 30 | MEI_CL_CS(SUCCESS); |
| 31 | MEI_CL_CS(NOT_FOUND); |
| 32 | MEI_CL_CS(ALREADY_STARTED); |
| 33 | MEI_CL_CS(OUT_OF_RESOURCES); |
| 34 | MEI_CL_CS(MESSAGE_SMALL); |
| 35 | default: return "unknown"; |
| 36 | } |
| 37 | #undef MEI_CL_CCS |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * mei_cl_conn_status_to_errno - convert client connect response |
| 42 | * status to error code |
| 43 | * |
| 44 | * @status: client connect response status |
| 45 | * |
| 46 | * returns corresponding error code |
| 47 | */ |
| 48 | static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) |
| 49 | { |
| 50 | switch (status) { |
| 51 | case MEI_CL_CONN_SUCCESS: return 0; |
| 52 | case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; |
| 53 | case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; |
| 54 | case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; |
| 55 | case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; |
| 56 | default: return -EINVAL; |
| 57 | } |
| 58 | } |
| 59 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 60 | /** |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 61 | * mei_hbm_me_cl_allocate - allocates storage for me clients |
| 62 | * |
| 63 | * @dev: the device structure |
| 64 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 65 | * returns 0 on success -ENOMEM on allocation failure |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 66 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 67 | static int mei_hbm_me_cl_allocate(struct mei_device *dev) |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 68 | { |
| 69 | struct mei_me_client *clients; |
| 70 | int b; |
| 71 | |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 72 | dev->me_clients_num = 0; |
| 73 | dev->me_client_presentation_num = 0; |
| 74 | dev->me_client_index = 0; |
| 75 | |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 76 | /* count how many ME clients we have */ |
| 77 | for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX) |
| 78 | dev->me_clients_num++; |
| 79 | |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 80 | if (dev->me_clients_num == 0) |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 81 | return 0; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 82 | |
| 83 | kfree(dev->me_clients); |
| 84 | dev->me_clients = NULL; |
| 85 | |
Tomas Winkler | e19555c | 2013-09-02 03:11:03 +0300 | [diff] [blame] | 86 | 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] | 87 | dev->me_clients_num * sizeof(struct mei_me_client)); |
| 88 | /* allocate storage for ME clients representation */ |
| 89 | clients = kcalloc(dev->me_clients_num, |
| 90 | sizeof(struct mei_me_client), GFP_KERNEL); |
| 91 | if (!clients) { |
| 92 | dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 93 | return -ENOMEM; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 94 | } |
| 95 | dev->me_clients = clients; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 96 | return 0; |
Tomas Winkler | a40b260 | 2013-01-08 23:07:19 +0200 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | /** |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 100 | * mei_hbm_cl_hdr - construct client hbm header |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 101 | * |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 102 | * @cl: - client |
| 103 | * @hbm_cmd: host bus message command |
| 104 | * @buf: buffer for cl header |
| 105 | * @len: buffer length |
| 106 | */ |
| 107 | static inline |
| 108 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) |
| 109 | { |
| 110 | struct mei_hbm_cl_cmd *cmd = buf; |
| 111 | |
| 112 | memset(cmd, 0, len); |
| 113 | |
| 114 | cmd->hbm_cmd = hbm_cmd; |
| 115 | cmd->host_addr = cl->host_client_id; |
| 116 | cmd->me_addr = cl->me_client_id; |
| 117 | } |
| 118 | |
| 119 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 120 | * mei_hbm_cl_addr_equal - tells if they have the same address |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 121 | * |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 122 | * @cl: - client |
| 123 | * @buf: buffer with cl header |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 124 | * |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 125 | * returns true if addresses are the same |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 126 | */ |
| 127 | static inline |
| 128 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) |
| 129 | { |
| 130 | struct mei_hbm_cl_cmd *cmd = buf; |
| 131 | return cl->host_client_id == cmd->host_addr && |
| 132 | cl->me_client_id == cmd->me_addr; |
| 133 | } |
| 134 | |
| 135 | |
| 136 | /** |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 137 | * mei_hbm_idle - set hbm to idle state |
| 138 | * |
| 139 | * @dev: the device structure |
| 140 | */ |
| 141 | void mei_hbm_idle(struct mei_device *dev) |
| 142 | { |
| 143 | dev->init_clients_timer = 0; |
| 144 | dev->hbm_state = MEI_HBM_IDLE; |
| 145 | } |
| 146 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 147 | int mei_hbm_start_wait(struct mei_device *dev) |
| 148 | { |
| 149 | int ret; |
| 150 | if (dev->hbm_state > MEI_HBM_START) |
| 151 | return 0; |
| 152 | |
| 153 | mutex_unlock(&dev->device_lock); |
| 154 | ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, |
| 155 | dev->hbm_state == MEI_HBM_IDLE || |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 156 | dev->hbm_state >= MEI_HBM_STARTED, |
Tomas Winkler | 7d93e58 | 2014-01-14 23:10:10 +0200 | [diff] [blame] | 157 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 158 | mutex_lock(&dev->device_lock); |
| 159 | |
| 160 | if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) { |
| 161 | dev->hbm_state = MEI_HBM_IDLE; |
Masanari Iida | 8b513d0 | 2013-05-21 23:13:12 +0900 | [diff] [blame] | 162 | dev_err(&dev->pdev->dev, "waiting for mei start failed\n"); |
Alexander Usyskin | 7ca96aa | 2014-02-19 17:35:49 +0200 | [diff] [blame] | 163 | return -ETIME; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 164 | } |
| 165 | return 0; |
| 166 | } |
| 167 | |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 168 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 169 | * mei_hbm_start_req - sends start request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 170 | * |
| 171 | * @dev: the device structure |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 172 | * |
| 173 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 174 | */ |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 175 | int mei_hbm_start_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 176 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 177 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 178 | struct hbm_host_version_request *start_req; |
| 179 | const size_t len = sizeof(struct hbm_host_version_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 180 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 181 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 182 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 183 | |
| 184 | /* host start message */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 185 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 186 | memset(start_req, 0, len); |
| 187 | start_req->hbm_cmd = HOST_START_REQ_CMD; |
| 188 | start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 189 | start_req->host_version.minor_version = HBM_MINOR_VERSION; |
| 190 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 191 | dev->hbm_state = MEI_HBM_IDLE; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 192 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 193 | if (ret) { |
| 194 | dev_err(&dev->pdev->dev, "version message write failed: ret = %d\n", |
| 195 | ret); |
| 196 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 197 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 198 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 199 | dev->hbm_state = MEI_HBM_START; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 200 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 201 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 202 | } |
| 203 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 204 | /* |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 205 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 206 | * |
| 207 | * @dev: the device structure |
| 208 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 209 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 210 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 211 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 212 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 213 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 214 | struct hbm_host_enum_request *enum_req; |
| 215 | const size_t len = sizeof(struct hbm_host_enum_request); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 216 | int ret; |
| 217 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 218 | /* enumerate clients */ |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 219 | mei_hbm_hdr(mei_hdr, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 220 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 221 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
| 222 | memset(enum_req, 0, len); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 223 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
| 224 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 225 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 226 | if (ret) { |
| 227 | dev_err(&dev->pdev->dev, "enumeration request write failed: ret = %d.\n", |
| 228 | ret); |
| 229 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 230 | } |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 231 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 232 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 233 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 234 | } |
| 235 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 236 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 237 | * mei_hbm_prop_req - request property for a single client |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 238 | * |
| 239 | * @dev: the device structure |
| 240 | * |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 241 | * returns 0 on success and < 0 on failure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 242 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 243 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 244 | static int mei_hbm_prop_req(struct mei_device *dev) |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 245 | { |
| 246 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 247 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 248 | struct hbm_props_request *prop_req; |
| 249 | const size_t len = sizeof(struct hbm_props_request); |
| 250 | unsigned long next_client_index; |
Tomas Winkler | 1aee351 | 2013-09-02 13:29:45 +0300 | [diff] [blame] | 251 | unsigned long client_num; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 252 | int ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 253 | |
| 254 | client_num = dev->me_client_presentation_num; |
| 255 | |
| 256 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
| 257 | dev->me_client_index); |
| 258 | |
| 259 | /* We got all client properties */ |
| 260 | if (next_client_index == MEI_CLIENTS_MAX) { |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 261 | dev->hbm_state = MEI_HBM_STARTED; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 262 | schedule_work(&dev->init_work); |
| 263 | |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | dev->me_clients[client_num].client_id = next_client_index; |
| 268 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; |
| 269 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 270 | mei_hbm_hdr(mei_hdr, len); |
| 271 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 272 | |
| 273 | memset(prop_req, 0, sizeof(struct hbm_props_request)); |
| 274 | |
| 275 | |
| 276 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
| 277 | prop_req->address = next_client_index; |
| 278 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 279 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 280 | if (ret) { |
| 281 | dev_err(&dev->pdev->dev, "properties request write failed: ret = %d\n", |
| 282 | ret); |
| 283 | return ret; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
| 287 | dev->me_client_index = next_client_index; |
| 288 | |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 293 | * mei_hbm_stop_req - send stop request message |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 294 | * |
| 295 | * @dev - mei device |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 296 | * @cl: client info |
| 297 | * |
| 298 | * This function returns -EIO on write failure |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 299 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 300 | static int mei_hbm_stop_req(struct mei_device *dev) |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 301 | { |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 302 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 303 | struct hbm_host_stop_request *req = |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 304 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 305 | const size_t len = sizeof(struct hbm_host_stop_request); |
| 306 | |
| 307 | mei_hbm_hdr(mei_hdr, len); |
| 308 | |
| 309 | memset(req, 0, len); |
| 310 | req->hbm_cmd = HOST_STOP_REQ_CMD; |
| 311 | req->reason = DRIVER_STOP_REQUEST; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 312 | |
| 313 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 314 | } |
| 315 | |
| 316 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 317 | * mei_hbm_cl_flow_control_req - sends flow control request. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 318 | * |
| 319 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 320 | * @cl: client info |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 321 | * |
| 322 | * This function returns -EIO on write failure |
| 323 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 324 | 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] | 325 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 326 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 327 | const size_t len = sizeof(struct hbm_flow_control); |
| 328 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 329 | mei_hbm_hdr(mei_hdr, len); |
| 330 | 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] | 331 | |
Tomas Winkler | 4692218 | 2014-03-16 14:35:55 +0200 | [diff] [blame^] | 332 | cl_dbg(dev, cl, "sending flow control\n"); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 333 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 334 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | /** |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 338 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 339 | * |
Masanari Iida | 393b148 | 2013-04-05 01:05:05 +0900 | [diff] [blame] | 340 | * @dev: the device structure |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 341 | * @flow: flow control. |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 342 | * |
| 343 | * return 0 on success, < 0 otherwise |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 344 | */ |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 345 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 346 | struct hbm_flow_control *flow) |
| 347 | { |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 348 | struct mei_me_client *me_cl; |
| 349 | int id; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 350 | |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 351 | id = mei_me_cl_by_id(dev, flow->me_addr); |
| 352 | if (id < 0) { |
| 353 | dev_err(&dev->pdev->dev, "no such me client %d\n", |
| 354 | flow->me_addr); |
| 355 | return id; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 356 | } |
Alexander Usyskin | 12d0066 | 2014-02-17 15:13:23 +0200 | [diff] [blame] | 357 | |
| 358 | me_cl = &dev->me_clients[id]; |
| 359 | if (me_cl->props.single_recv_buf) { |
| 360 | me_cl->mei_flow_ctrl_creds++; |
| 361 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", |
| 362 | flow->me_addr); |
| 363 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", |
| 364 | me_cl->mei_flow_ctrl_creds); |
| 365 | } else { |
| 366 | BUG(); /* error in flow control */ |
| 367 | } |
| 368 | |
| 369 | return 0; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | /** |
| 373 | * mei_hbm_cl_flow_control_res - flow control response from me |
| 374 | * |
| 375 | * @dev: the device structure |
| 376 | * @flow_control: flow control response bus message |
| 377 | */ |
| 378 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, |
| 379 | struct hbm_flow_control *flow_control) |
| 380 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 381 | struct mei_cl *cl; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 382 | |
| 383 | if (!flow_control->host_addr) { |
| 384 | /* single receive buffer */ |
| 385 | mei_hbm_add_single_flow_creds(dev, flow_control); |
| 386 | return; |
| 387 | } |
| 388 | |
| 389 | /* normal connection */ |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 390 | list_for_each_entry(cl, &dev->file_list, link) { |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 391 | if (mei_hbm_cl_addr_equal(cl, flow_control)) { |
| 392 | cl->mei_flow_ctrl_creds++; |
| 393 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", |
| 394 | flow_control->host_addr, flow_control->me_addr); |
| 395 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", |
| 396 | cl->mei_flow_ctrl_creds); |
| 397 | break; |
| 398 | } |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | |
| 403 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 404 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 405 | * |
| 406 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 407 | * @cl: a client to disconnect from |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 408 | * |
| 409 | * This function returns -EIO on write failure |
| 410 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 411 | 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] | 412 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 413 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 414 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 415 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 416 | mei_hbm_hdr(mei_hdr, len); |
| 417 | 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] | 418 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 419 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 420 | } |
| 421 | |
| 422 | /** |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 423 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW |
| 424 | * |
| 425 | * @dev: the device structure |
| 426 | * @cl: a client to disconnect from |
| 427 | * |
| 428 | * This function returns -EIO on write failure |
| 429 | */ |
| 430 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) |
| 431 | { |
| 432 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
| 433 | const size_t len = sizeof(struct hbm_client_connect_response); |
| 434 | |
| 435 | mei_hbm_hdr(mei_hdr, len); |
| 436 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, dev->wr_msg.data, len); |
| 437 | |
| 438 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
| 439 | } |
| 440 | |
| 441 | /** |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 442 | * mei_hbm_cl_disconnect_res - disconnect response from ME |
| 443 | * |
| 444 | * @dev: the device structure |
| 445 | * @rs: disconnect response bus message |
| 446 | */ |
| 447 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, |
| 448 | struct hbm_client_connect_response *rs) |
| 449 | { |
| 450 | struct mei_cl *cl; |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 451 | struct mei_cl_cb *cb, *next; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 452 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 453 | dev_dbg(&dev->pdev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n", |
| 454 | rs->me_addr, rs->host_addr, rs->status); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 455 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 456 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
| 457 | cl = cb->cl; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 458 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 459 | /* this should not happen */ |
| 460 | if (WARN_ON(!cl)) { |
| 461 | list_del(&cb->list); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 462 | return; |
| 463 | } |
| 464 | |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 465 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 466 | list_del(&cb->list); |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 467 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 468 | cl->state = MEI_FILE_DISCONNECTED; |
| 469 | |
| 470 | cl->status = 0; |
| 471 | cl->timer_count = 0; |
| 472 | break; |
| 473 | } |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | /** |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 478 | * mei_hbm_cl_connect_req - send connection request to specific me client |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 479 | * |
| 480 | * @dev: the device structure |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 481 | * @cl: a client to connect to |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 482 | * |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 483 | * returns -EIO on write failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 484 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 485 | 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] | 486 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 487 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 488 | const size_t len = sizeof(struct hbm_client_connect_request); |
| 489 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 490 | mei_hbm_hdr(mei_hdr, len); |
| 491 | 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] | 492 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 493 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 497 | * mei_hbm_cl_connect_res - connect response from the ME |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 498 | * |
| 499 | * @dev: the device structure |
| 500 | * @rs: connect response bus message |
| 501 | */ |
| 502 | static void mei_hbm_cl_connect_res(struct mei_device *dev, |
| 503 | struct hbm_client_connect_response *rs) |
| 504 | { |
| 505 | |
| 506 | struct mei_cl *cl; |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 507 | struct mei_cl_cb *cb, *next; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 508 | |
Alexander Usyskin | 285e299 | 2014-02-17 15:13:20 +0200 | [diff] [blame] | 509 | dev_dbg(&dev->pdev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n", |
| 510 | rs->me_addr, rs->host_addr, |
| 511 | mei_cl_conn_status_str(rs->status)); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 512 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 513 | cl = NULL; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 514 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 515 | 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] | 516 | |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 517 | cl = cb->cl; |
| 518 | /* this should not happen */ |
| 519 | if (WARN_ON(!cl)) { |
| 520 | list_del_init(&cb->list); |
| 521 | continue; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 522 | } |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 523 | |
| 524 | if (cb->fop_type != MEI_FOP_CONNECT) |
| 525 | continue; |
| 526 | |
| 527 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
| 528 | list_del(&cb->list); |
| 529 | break; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 530 | } |
| 531 | } |
Tomas Winkler | 6409285 | 2014-02-17 15:13:21 +0200 | [diff] [blame] | 532 | |
| 533 | if (!cl) |
| 534 | return; |
| 535 | |
| 536 | cl->timer_count = 0; |
| 537 | if (rs->status == MEI_CL_CONN_SUCCESS) |
| 538 | cl->state = MEI_FILE_CONNECTED; |
| 539 | else |
| 540 | cl->state = MEI_FILE_DISCONNECTED; |
| 541 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | |
| 545 | /** |
Alexander Usyskin | 83ce074 | 2014-01-08 22:31:46 +0200 | [diff] [blame] | 546 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
| 547 | * host sends disconnect response |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 548 | * |
| 549 | * @dev: the device structure. |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 550 | * @disconnect_req: disconnect request bus message from the me |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 551 | * |
| 552 | * returns -ENOMEM on allocation failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 553 | */ |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 554 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 555 | struct hbm_client_connect_request *disconnect_req) |
| 556 | { |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 557 | struct mei_cl *cl; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 558 | struct mei_cl_cb *cb; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 559 | |
Tomas Winkler | 31f88f5 | 2014-02-17 15:13:25 +0200 | [diff] [blame] | 560 | list_for_each_entry(cl, &dev->file_list, link) { |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 561 | if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 562 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", |
| 563 | disconnect_req->host_addr, |
| 564 | disconnect_req->me_addr); |
Tomas Winkler | cd51ed6 | 2012-12-25 19:06:09 +0200 | [diff] [blame] | 565 | cl->state = MEI_FILE_DISCONNECTED; |
| 566 | cl->timer_count = 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 567 | |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 568 | cb = mei_io_cb_init(cl, NULL); |
| 569 | if (!cb) |
| 570 | return -ENOMEM; |
| 571 | cb->fop_type = MEI_FOP_DISCONNECT_RSP; |
| 572 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
| 573 | list_add(&cb->list, &dev->ctrl_wr_list.list); |
| 574 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 575 | break; |
| 576 | } |
| 577 | } |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 578 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | |
| 582 | /** |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 583 | * mei_hbm_version_is_supported - checks whether the driver can |
| 584 | * support the hbm version of the device |
| 585 | * |
| 586 | * @dev: the device structure |
| 587 | * returns true if driver can support hbm version of the device |
| 588 | */ |
| 589 | bool mei_hbm_version_is_supported(struct mei_device *dev) |
| 590 | { |
| 591 | return (dev->version.major_version < HBM_MAJOR_VERSION) || |
| 592 | (dev->version.major_version == HBM_MAJOR_VERSION && |
| 593 | dev->version.minor_version <= HBM_MINOR_VERSION); |
| 594 | } |
| 595 | |
| 596 | /** |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 597 | * mei_hbm_dispatch - bottom half read routine after ISR to |
| 598 | * handle the read bus message cmd processing. |
| 599 | * |
| 600 | * @dev: the device structure |
| 601 | * @mei_hdr: header of bus message |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 602 | * |
| 603 | * returns 0 on success and < 0 on failure |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 604 | */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 605 | 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] | 606 | { |
| 607 | struct mei_bus_message *mei_msg; |
| 608 | struct mei_me_client *me_client; |
| 609 | struct hbm_host_version_response *version_res; |
| 610 | struct hbm_client_connect_response *connect_res; |
| 611 | struct hbm_client_connect_response *disconnect_res; |
| 612 | struct hbm_client_connect_request *disconnect_req; |
| 613 | struct hbm_flow_control *flow_control; |
| 614 | struct hbm_props_response *props_res; |
| 615 | struct hbm_host_enum_response *enum_res; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 616 | |
| 617 | /* read the message to our buffer */ |
| 618 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); |
| 619 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); |
| 620 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; |
| 621 | |
Tomas Winkler | 66ae460 | 2014-01-08 20:19:22 +0200 | [diff] [blame] | 622 | /* ignore spurious message and prevent reset nesting |
| 623 | * hbm is put to idle during system reset |
| 624 | */ |
| 625 | if (dev->hbm_state == MEI_HBM_IDLE) { |
| 626 | dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n"); |
| 627 | return 0; |
| 628 | } |
| 629 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 630 | switch (mei_msg->hbm_cmd) { |
| 631 | case HOST_START_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 632 | dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n"); |
| 633 | |
| 634 | dev->init_clients_timer = 0; |
| 635 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 636 | version_res = (struct hbm_host_version_response *)mei_msg; |
Tomas Winkler | 2c9b48a | 2013-06-16 09:16:31 +0300 | [diff] [blame] | 637 | |
| 638 | dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
| 639 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
| 640 | version_res->me_max_version.major_version, |
| 641 | version_res->me_max_version.minor_version); |
| 642 | |
| 643 | if (version_res->host_version_supported) { |
| 644 | dev->version.major_version = HBM_MAJOR_VERSION; |
| 645 | dev->version.minor_version = HBM_MINOR_VERSION; |
| 646 | } else { |
| 647 | dev->version.major_version = |
| 648 | version_res->me_max_version.major_version; |
| 649 | dev->version.minor_version = |
| 650 | version_res->me_max_version.minor_version; |
| 651 | } |
| 652 | |
| 653 | if (!mei_hbm_version_is_supported(dev)) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 654 | 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] | 655 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 656 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 657 | if (mei_hbm_stop_req(dev)) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 658 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
| 659 | return -EIO; |
| 660 | } |
| 661 | break; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 662 | } |
| 663 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 664 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 665 | dev->hbm_state != MEI_HBM_START) { |
| 666 | dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
| 667 | dev->dev_state, dev->hbm_state); |
| 668 | return -EPROTO; |
| 669 | } |
| 670 | |
| 671 | dev->hbm_state = MEI_HBM_STARTED; |
| 672 | |
| 673 | if (mei_hbm_enum_clients_req(dev)) { |
| 674 | dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n"); |
| 675 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 676 | } |
| 677 | |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 678 | wake_up_interruptible(&dev->wait_recvd_msg); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 679 | break; |
| 680 | |
| 681 | case CLIENT_CONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 682 | dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n"); |
| 683 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 684 | connect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 685 | mei_hbm_cl_connect_res(dev, connect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 686 | wake_up(&dev->wait_recvd_msg); |
| 687 | break; |
| 688 | |
| 689 | case CLIENT_DISCONNECT_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 690 | dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n"); |
| 691 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 692 | disconnect_res = (struct hbm_client_connect_response *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 693 | mei_hbm_cl_disconnect_res(dev, disconnect_res); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 694 | wake_up(&dev->wait_recvd_msg); |
| 695 | break; |
| 696 | |
| 697 | case MEI_FLOW_CONTROL_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 698 | dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n"); |
| 699 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 700 | flow_control = (struct hbm_flow_control *) mei_msg; |
Tomas Winkler | 6bbda15 | 2012-12-25 19:06:12 +0200 | [diff] [blame] | 701 | mei_hbm_cl_flow_control_res(dev, flow_control); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 702 | break; |
| 703 | |
| 704 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 705 | dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n"); |
| 706 | |
| 707 | dev->init_clients_timer = 0; |
| 708 | |
| 709 | if (dev->me_clients == NULL) { |
| 710 | dev_err(&dev->pdev->dev, "hbm: properties response: mei_clients not allocated\n"); |
| 711 | return -EPROTO; |
| 712 | } |
| 713 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 714 | props_res = (struct hbm_props_response *)mei_msg; |
| 715 | me_client = &dev->me_clients[dev->me_client_presentation_num]; |
| 716 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 717 | if (props_res->status) { |
| 718 | dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n", |
| 719 | props_res->status); |
| 720 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | if (me_client->client_id != props_res->address) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 724 | dev_err(&dev->pdev->dev, "hbm: properties response: address mismatch %d ?= %d\n", |
| 725 | me_client->client_id, props_res->address); |
| 726 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 727 | } |
| 728 | |
| 729 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 730 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 731 | dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
| 732 | dev->dev_state, dev->hbm_state); |
| 733 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | me_client->props = props_res->client_properties; |
| 737 | dev->me_client_index++; |
| 738 | dev->me_client_presentation_num++; |
| 739 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 740 | /* request property for the next client */ |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 741 | if (mei_hbm_prop_req(dev)) |
| 742 | return -EIO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 743 | |
| 744 | break; |
| 745 | |
| 746 | case HOST_ENUM_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 747 | dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n"); |
| 748 | |
| 749 | dev->init_clients_timer = 0; |
| 750 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 751 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
Tomas Winkler | 23f5a32 | 2013-09-02 03:11:01 +0300 | [diff] [blame] | 752 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
| 753 | < sizeof(enum_res->valid_addresses)); |
| 754 | memcpy(dev->me_clients_map, enum_res->valid_addresses, |
| 755 | sizeof(enum_res->valid_addresses)); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 756 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 757 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
| 758 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { |
| 759 | dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
| 760 | dev->dev_state, dev->hbm_state); |
| 761 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 762 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 763 | |
| 764 | if (mei_hbm_me_cl_allocate(dev)) { |
| 765 | dev_err(&dev->pdev->dev, "hbm: enumeration response: cannot allocate clients array\n"); |
| 766 | return -ENOMEM; |
| 767 | } |
| 768 | |
| 769 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
| 770 | |
| 771 | /* first property request */ |
| 772 | if (mei_hbm_prop_req(dev)) |
| 773 | return -EIO; |
| 774 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 775 | break; |
| 776 | |
| 777 | case HOST_STOP_RES_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 778 | dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n"); |
Tomas Winkler | 9b0d5ef | 2013-04-18 23:03:48 +0300 | [diff] [blame] | 779 | |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 780 | dev->init_clients_timer = 0; |
| 781 | |
| 782 | if (dev->hbm_state != MEI_HBM_STOPPED) { |
| 783 | dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
| 784 | dev->dev_state, dev->hbm_state); |
| 785 | return -EPROTO; |
| 786 | } |
| 787 | |
Tomas Winkler | 33ec082 | 2014-01-12 00:36:09 +0200 | [diff] [blame] | 788 | dev->dev_state = MEI_DEV_POWER_DOWN; |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 789 | dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n"); |
| 790 | /* force the reset */ |
| 791 | return -EPROTO; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 792 | break; |
| 793 | |
| 794 | case CLIENT_DISCONNECT_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 795 | dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n"); |
| 796 | |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 797 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame] | 798 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 799 | break; |
| 800 | |
| 801 | case ME_STOP_REQ_CMD: |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 802 | dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n"); |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 803 | dev->hbm_state = MEI_HBM_STOPPED; |
Tomas Winkler | 6bb948c | 2014-02-12 21:41:52 +0200 | [diff] [blame] | 804 | if (mei_hbm_stop_req(dev)) { |
| 805 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
| 806 | return -EIO; |
| 807 | } |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 808 | break; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 809 | default: |
| 810 | BUG(); |
| 811 | break; |
| 812 | |
| 813 | } |
Tomas Winkler | 544f946 | 2014-01-08 20:19:21 +0200 | [diff] [blame] | 814 | return 0; |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 815 | } |
| 816 | |