Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Intel Management Engine Interface (Intel MEI) Linux driver |
Tomas Winkler | 733ba91 | 2012-02-09 19:25:53 +0200 | [diff] [blame] | 4 | * Copyright (c) 2003-2012, Intel Corporation. |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 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/delay.h> |
| 21 | |
| 22 | #include "mei_dev.h" |
| 23 | #include "hw.h" |
| 24 | #include "interface.h" |
Tomas Winkler | 4f3afe1 | 2012-05-09 16:38:59 +0300 | [diff] [blame] | 25 | #include <linux/mei.h> |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 26 | |
| 27 | const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac, |
| 28 | 0xa8, 0x46, 0xe0, 0xff, 0x65, |
| 29 | 0x81, 0x4c); |
| 30 | |
| 31 | /** |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 32 | * mei_io_list_init - Sets up a queue list. |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 33 | * |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 34 | * @list: An instance io list structure |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 35 | * @dev: the device structure |
| 36 | */ |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 37 | void mei_io_list_init(struct mei_io_list *list) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 38 | { |
| 39 | /* initialize our queue list */ |
| 40 | INIT_LIST_HEAD(&list->mei_cb.cb_list); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | /** |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 44 | * mei_io_list_flush - removes list entry belonging to cl. |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 45 | * |
| 46 | * @list: An instance of our list structure |
| 47 | * @cl: private data of the file object |
| 48 | */ |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 49 | void mei_io_list_flush(struct mei_io_list *list, struct mei_cl *cl) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 50 | { |
Tomas Winkler | 3a5352f | 2011-12-04 16:16:27 +0200 | [diff] [blame] | 51 | struct mei_cl_cb *pos; |
| 52 | struct mei_cl_cb *next; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 53 | |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 54 | list_for_each_entry_safe(pos, next, &list->mei_cb.cb_list, cb_list) { |
Tomas Winkler | 3a5352f | 2011-12-04 16:16:27 +0200 | [diff] [blame] | 55 | if (pos->file_private) { |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 56 | struct mei_cl *cl_tmp; |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 57 | cl_tmp = (struct mei_cl *)pos->file_private; |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 58 | if (mei_cl_cmp_id(cl, cl_tmp)) |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 59 | list_del(&pos->cb_list); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 60 | } |
| 61 | } |
| 62 | } |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 63 | /** |
| 64 | * mei_cl_flush_queues - flushes queue lists belonging to cl. |
| 65 | * |
| 66 | * @dev: the device structure |
| 67 | * @cl: private data of the file object |
| 68 | */ |
| 69 | int mei_cl_flush_queues(struct mei_cl *cl) |
| 70 | { |
| 71 | if (!cl || !cl->dev) |
| 72 | return -EINVAL; |
| 73 | |
| 74 | dev_dbg(&cl->dev->pdev->dev, "remove list entry belonging to cl\n"); |
| 75 | mei_io_list_flush(&cl->dev->read_list, cl); |
| 76 | mei_io_list_flush(&cl->dev->write_list, cl); |
| 77 | mei_io_list_flush(&cl->dev->write_waiting_list, cl); |
| 78 | mei_io_list_flush(&cl->dev->ctrl_wr_list, cl); |
| 79 | mei_io_list_flush(&cl->dev->ctrl_rd_list, cl); |
| 80 | mei_io_list_flush(&cl->dev->amthi_cmd_list, cl); |
| 81 | mei_io_list_flush(&cl->dev->amthi_read_complete_list, cl); |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 86 | |
| 87 | /** |
| 88 | * mei_reset_iamthif_params - initializes mei device iamthif |
| 89 | * |
| 90 | * @dev: the device structure |
| 91 | */ |
| 92 | static void mei_reset_iamthif_params(struct mei_device *dev) |
| 93 | { |
| 94 | /* reset iamthif parameters. */ |
| 95 | dev->iamthif_current_cb = NULL; |
| 96 | dev->iamthif_msg_buf_size = 0; |
| 97 | dev->iamthif_msg_buf_index = 0; |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 98 | dev->iamthif_canceled = false; |
| 99 | dev->iamthif_ioctl = false; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 100 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
| 101 | dev->iamthif_timer = 0; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * init_mei_device - allocates and initializes the mei device structure |
| 106 | * |
| 107 | * @pdev: The pci device structure |
| 108 | * |
| 109 | * returns The mei_device_device pointer on success, NULL on failure. |
| 110 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 111 | struct mei_device *mei_device_init(struct pci_dev *pdev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 112 | { |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 113 | struct mei_device *dev; |
| 114 | |
| 115 | dev = kzalloc(sizeof(struct mei_device), GFP_KERNEL); |
| 116 | if (!dev) |
| 117 | return NULL; |
| 118 | |
| 119 | /* setup our list array */ |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 120 | INIT_LIST_HEAD(&dev->file_list); |
| 121 | INIT_LIST_HEAD(&dev->wd_cl.link); |
| 122 | INIT_LIST_HEAD(&dev->iamthif_cl.link); |
| 123 | mutex_init(&dev->device_lock); |
| 124 | init_waitqueue_head(&dev->wait_recvd_msg); |
| 125 | init_waitqueue_head(&dev->wait_stop_wd); |
| 126 | dev->mei_state = MEI_INITIALIZING; |
| 127 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
Oren Weil | 9ce178e | 2011-09-07 09:03:09 +0300 | [diff] [blame] | 128 | dev->wd_interface_reg = false; |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 129 | |
| 130 | |
| 131 | mei_io_list_init(&dev->read_list); |
| 132 | mei_io_list_init(&dev->write_list); |
| 133 | mei_io_list_init(&dev->write_waiting_list); |
| 134 | mei_io_list_init(&dev->ctrl_wr_list); |
| 135 | mei_io_list_init(&dev->ctrl_rd_list); |
| 136 | mei_io_list_init(&dev->amthi_cmd_list); |
| 137 | mei_io_list_init(&dev->amthi_read_complete_list); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 138 | dev->pdev = pdev; |
| 139 | return dev; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * mei_hw_init - initializes host and fw to start work. |
| 144 | * |
| 145 | * @dev: the device structure |
| 146 | * |
| 147 | * returns 0 on success, <0 on failure. |
| 148 | */ |
| 149 | int mei_hw_init(struct mei_device *dev) |
| 150 | { |
| 151 | int err = 0; |
| 152 | int ret; |
| 153 | |
| 154 | mutex_lock(&dev->device_lock); |
| 155 | |
| 156 | dev->host_hw_state = mei_hcsr_read(dev); |
| 157 | dev->me_hw_state = mei_mecsr_read(dev); |
| 158 | dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, mestate = 0x%08x.\n", |
| 159 | dev->host_hw_state, dev->me_hw_state); |
| 160 | |
| 161 | /* acknowledge interrupt and stop interupts */ |
| 162 | if ((dev->host_hw_state & H_IS) == H_IS) |
| 163 | mei_reg_write(dev, H_CSR, dev->host_hw_state); |
| 164 | |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 165 | dev->recvd_msg = false; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 166 | dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); |
| 167 | |
| 168 | mei_reset(dev, 1); |
| 169 | |
| 170 | dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", |
| 171 | dev->host_hw_state, dev->me_hw_state); |
| 172 | |
| 173 | /* wait for ME to turn on ME_RDY */ |
| 174 | if (!dev->recvd_msg) { |
| 175 | mutex_unlock(&dev->device_lock); |
| 176 | err = wait_event_interruptible_timeout(dev->wait_recvd_msg, |
| 177 | dev->recvd_msg, MEI_INTEROP_TIMEOUT); |
| 178 | mutex_lock(&dev->device_lock); |
| 179 | } |
| 180 | |
Tomas Winkler | a534bb6 | 2011-06-13 16:39:31 +0300 | [diff] [blame] | 181 | if (err <= 0 && !dev->recvd_msg) { |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 182 | dev->mei_state = MEI_DISABLED; |
| 183 | dev_dbg(&dev->pdev->dev, |
| 184 | "wait_event_interruptible_timeout failed" |
| 185 | "on wait for ME to turn on ME_RDY.\n"); |
| 186 | ret = -ENODEV; |
| 187 | goto out; |
| 188 | } |
| 189 | |
| 190 | if (!(((dev->host_hw_state & H_RDY) == H_RDY) && |
| 191 | ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) { |
| 192 | dev->mei_state = MEI_DISABLED; |
| 193 | dev_dbg(&dev->pdev->dev, |
| 194 | "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", |
| 195 | dev->host_hw_state, dev->me_hw_state); |
| 196 | |
Dan Carpenter | 8eb73c6 | 2011-06-09 10:18:23 +0300 | [diff] [blame] | 197 | if (!(dev->host_hw_state & H_RDY)) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 198 | dev_dbg(&dev->pdev->dev, "host turn off H_RDY.\n"); |
| 199 | |
Dan Carpenter | 8eb73c6 | 2011-06-09 10:18:23 +0300 | [diff] [blame] | 200 | if (!(dev->me_hw_state & ME_RDY_HRA)) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 201 | dev_dbg(&dev->pdev->dev, "ME turn off ME_RDY.\n"); |
| 202 | |
Tomas Winkler | d39a464 | 2012-03-19 17:58:42 +0200 | [diff] [blame] | 203 | dev_err(&dev->pdev->dev, "link layer initialization failed.\n"); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 204 | ret = -ENODEV; |
| 205 | goto out; |
| 206 | } |
| 207 | |
| 208 | if (dev->version.major_version != HBM_MAJOR_VERSION || |
| 209 | dev->version.minor_version != HBM_MINOR_VERSION) { |
| 210 | dev_dbg(&dev->pdev->dev, "MEI start failed.\n"); |
| 211 | ret = -ENODEV; |
| 212 | goto out; |
| 213 | } |
| 214 | |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 215 | dev->recvd_msg = false; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 216 | dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", |
| 217 | dev->host_hw_state, dev->me_hw_state); |
| 218 | dev_dbg(&dev->pdev->dev, "ME turn on ME_RDY and host turn on H_RDY.\n"); |
| 219 | dev_dbg(&dev->pdev->dev, "link layer has been established.\n"); |
| 220 | dev_dbg(&dev->pdev->dev, "MEI start success.\n"); |
| 221 | ret = 0; |
| 222 | |
| 223 | out: |
| 224 | mutex_unlock(&dev->device_lock); |
| 225 | return ret; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * mei_hw_reset - resets fw via mei csr register. |
| 230 | * |
| 231 | * @dev: the device structure |
| 232 | * @interrupts_enabled: if interrupt should be enabled after reset. |
| 233 | */ |
| 234 | static void mei_hw_reset(struct mei_device *dev, int interrupts_enabled) |
| 235 | { |
| 236 | dev->host_hw_state |= (H_RST | H_IG); |
| 237 | |
| 238 | if (interrupts_enabled) |
| 239 | mei_enable_interrupts(dev); |
| 240 | else |
| 241 | mei_disable_interrupts(dev); |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * mei_reset - resets host and fw. |
| 246 | * |
| 247 | * @dev: the device structure |
| 248 | * @interrupts_enabled: if interrupt should be enabled after reset. |
| 249 | */ |
| 250 | void mei_reset(struct mei_device *dev, int interrupts_enabled) |
| 251 | { |
| 252 | struct mei_cl *cl_pos = NULL; |
| 253 | struct mei_cl *cl_next = NULL; |
| 254 | struct mei_cl_cb *cb_pos = NULL; |
| 255 | struct mei_cl_cb *cb_next = NULL; |
| 256 | bool unexpected; |
| 257 | |
| 258 | if (dev->mei_state == MEI_RECOVERING_FROM_RESET) { |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 259 | dev->need_reset = true; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 260 | return; |
| 261 | } |
| 262 | |
| 263 | unexpected = (dev->mei_state != MEI_INITIALIZING && |
| 264 | dev->mei_state != MEI_DISABLED && |
| 265 | dev->mei_state != MEI_POWER_DOWN && |
| 266 | dev->mei_state != MEI_POWER_UP); |
| 267 | |
| 268 | dev->host_hw_state = mei_hcsr_read(dev); |
| 269 | |
| 270 | dev_dbg(&dev->pdev->dev, "before reset host_hw_state = 0x%08x.\n", |
| 271 | dev->host_hw_state); |
| 272 | |
| 273 | mei_hw_reset(dev, interrupts_enabled); |
| 274 | |
| 275 | dev->host_hw_state &= ~H_RST; |
| 276 | dev->host_hw_state |= H_IG; |
| 277 | |
| 278 | mei_hcsr_set(dev); |
| 279 | |
| 280 | dev_dbg(&dev->pdev->dev, "currently saved host_hw_state = 0x%08x.\n", |
| 281 | dev->host_hw_state); |
| 282 | |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 283 | dev->need_reset = false; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 284 | |
| 285 | if (dev->mei_state != MEI_INITIALIZING) { |
| 286 | if (dev->mei_state != MEI_DISABLED && |
| 287 | dev->mei_state != MEI_POWER_DOWN) |
| 288 | dev->mei_state = MEI_RESETING; |
| 289 | |
| 290 | list_for_each_entry_safe(cl_pos, |
| 291 | cl_next, &dev->file_list, link) { |
| 292 | cl_pos->state = MEI_FILE_DISCONNECTED; |
| 293 | cl_pos->mei_flow_ctrl_creds = 0; |
| 294 | cl_pos->read_cb = NULL; |
| 295 | cl_pos->timer_count = 0; |
| 296 | } |
| 297 | /* remove entry if already in list */ |
| 298 | dev_dbg(&dev->pdev->dev, "list del iamthif and wd file list.\n"); |
| 299 | mei_remove_client_from_file_list(dev, |
| 300 | dev->wd_cl.host_client_id); |
| 301 | |
| 302 | mei_remove_client_from_file_list(dev, |
| 303 | dev->iamthif_cl.host_client_id); |
| 304 | |
| 305 | mei_reset_iamthif_params(dev); |
| 306 | dev->wd_due_counter = 0; |
| 307 | dev->extra_write_index = 0; |
| 308 | } |
| 309 | |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 310 | dev->me_clients_num = 0; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 311 | dev->rd_msg_hdr = 0; |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 312 | dev->stop = false; |
| 313 | dev->wd_pending = false; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 314 | |
| 315 | /* update the state of the registers after reset */ |
| 316 | dev->host_hw_state = mei_hcsr_read(dev); |
| 317 | dev->me_hw_state = mei_mecsr_read(dev); |
| 318 | |
| 319 | dev_dbg(&dev->pdev->dev, "after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", |
| 320 | dev->host_hw_state, dev->me_hw_state); |
| 321 | |
| 322 | if (unexpected) |
| 323 | dev_warn(&dev->pdev->dev, "unexpected reset.\n"); |
| 324 | |
| 325 | /* Wake up all readings so they can be interrupted */ |
| 326 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { |
| 327 | if (waitqueue_active(&cl_pos->rx_wait)) { |
| 328 | dev_dbg(&dev->pdev->dev, "Waking up client!\n"); |
| 329 | wake_up_interruptible(&cl_pos->rx_wait); |
| 330 | } |
| 331 | } |
| 332 | /* remove all waiting requests */ |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 333 | list_for_each_entry_safe(cb_pos, cb_next, |
| 334 | &dev->write_list.mei_cb.cb_list, cb_list) { |
Tomas Winkler | 3a5352f | 2011-12-04 16:16:27 +0200 | [diff] [blame] | 335 | list_del(&cb_pos->cb_list); |
| 336 | mei_free_cb_private(cb_pos); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 337 | } |
| 338 | } |
| 339 | |
| 340 | |
| 341 | |
| 342 | /** |
| 343 | * host_start_message - mei host sends start message. |
| 344 | * |
| 345 | * @dev: the device structure |
| 346 | * |
| 347 | * returns none. |
| 348 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 349 | void mei_host_start_message(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 350 | { |
| 351 | struct mei_msg_hdr *mei_hdr; |
| 352 | struct hbm_host_version_request *host_start_req; |
| 353 | |
| 354 | /* host start message */ |
| 355 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; |
| 356 | mei_hdr->host_addr = 0; |
| 357 | mei_hdr->me_addr = 0; |
| 358 | mei_hdr->length = sizeof(struct hbm_host_version_request); |
| 359 | mei_hdr->msg_complete = 1; |
| 360 | mei_hdr->reserved = 0; |
| 361 | |
| 362 | host_start_req = |
| 363 | (struct hbm_host_version_request *) &dev->wr_msg_buf[1]; |
| 364 | memset(host_start_req, 0, sizeof(struct hbm_host_version_request)); |
Tomas Winkler | 1ca7e78 | 2012-02-26 23:18:57 +0200 | [diff] [blame] | 365 | host_start_req->hbm_cmd = HOST_START_REQ_CMD; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 366 | host_start_req->host_version.major_version = HBM_MAJOR_VERSION; |
| 367 | host_start_req->host_version.minor_version = HBM_MINOR_VERSION; |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 368 | dev->recvd_msg = false; |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 369 | if (mei_write_message(dev, mei_hdr, (unsigned char *)host_start_req, |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 370 | mei_hdr->length)) { |
| 371 | dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); |
| 372 | dev->mei_state = MEI_RESETING; |
| 373 | mei_reset(dev, 1); |
| 374 | } |
| 375 | dev->init_clients_state = MEI_START_MESSAGE; |
| 376 | dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; |
| 377 | return ; |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * host_enum_clients_message - host sends enumeration client request message. |
| 382 | * |
| 383 | * @dev: the device structure |
| 384 | * |
| 385 | * returns none. |
| 386 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 387 | void mei_host_enum_clients_message(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 388 | { |
| 389 | struct mei_msg_hdr *mei_hdr; |
| 390 | struct hbm_host_enum_request *host_enum_req; |
| 391 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; |
| 392 | /* enumerate clients */ |
| 393 | mei_hdr->host_addr = 0; |
| 394 | mei_hdr->me_addr = 0; |
| 395 | mei_hdr->length = sizeof(struct hbm_host_enum_request); |
| 396 | mei_hdr->msg_complete = 1; |
| 397 | mei_hdr->reserved = 0; |
| 398 | |
| 399 | host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1]; |
| 400 | memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request)); |
Tomas Winkler | 1ca7e78 | 2012-02-26 23:18:57 +0200 | [diff] [blame] | 401 | host_enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 402 | if (mei_write_message(dev, mei_hdr, (unsigned char *)host_enum_req, |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 403 | mei_hdr->length)) { |
| 404 | dev->mei_state = MEI_RESETING; |
| 405 | dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); |
| 406 | mei_reset(dev, 1); |
| 407 | } |
| 408 | dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE; |
| 409 | dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 410 | return; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | |
| 414 | /** |
| 415 | * allocate_me_clients_storage - allocates storage for me clients |
| 416 | * |
| 417 | * @dev: the device structure |
| 418 | * |
| 419 | * returns none. |
| 420 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 421 | void mei_allocate_me_clients_storage(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 422 | { |
| 423 | struct mei_me_client *clients; |
| 424 | int b; |
| 425 | |
| 426 | /* count how many ME clients we have */ |
| 427 | for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX) |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 428 | dev->me_clients_num++; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 429 | |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 430 | if (dev->me_clients_num <= 0) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 431 | return ; |
| 432 | |
| 433 | |
| 434 | if (dev->me_clients != NULL) { |
| 435 | kfree(dev->me_clients); |
| 436 | dev->me_clients = NULL; |
| 437 | } |
| 438 | dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n", |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 439 | dev->me_clients_num * sizeof(struct mei_me_client)); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 440 | /* allocate storage for ME clients representation */ |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 441 | clients = kcalloc(dev->me_clients_num, |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 442 | sizeof(struct mei_me_client), GFP_KERNEL); |
| 443 | if (!clients) { |
| 444 | dev_dbg(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); |
| 445 | dev->mei_state = MEI_RESETING; |
| 446 | mei_reset(dev, 1); |
| 447 | return ; |
| 448 | } |
| 449 | dev->me_clients = clients; |
| 450 | return ; |
| 451 | } |
| 452 | /** |
| 453 | * host_client_properties - reads properties for client |
| 454 | * |
| 455 | * @dev: the device structure |
| 456 | * |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 457 | * returns: |
| 458 | * < 0 - Error. |
| 459 | * = 0 - no more clients. |
| 460 | * = 1 - still have clients to send properties request. |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 461 | */ |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 462 | int mei_host_client_properties(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 463 | { |
| 464 | struct mei_msg_hdr *mei_header; |
| 465 | struct hbm_props_request *host_cli_req; |
| 466 | int b; |
| 467 | u8 client_num = dev->me_client_presentation_num; |
| 468 | |
| 469 | b = dev->me_client_index; |
| 470 | b = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, b); |
| 471 | if (b < MEI_CLIENTS_MAX) { |
| 472 | dev->me_clients[client_num].client_id = b; |
| 473 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; |
| 474 | mei_header = (struct mei_msg_hdr *)&dev->wr_msg_buf[0]; |
| 475 | mei_header->host_addr = 0; |
| 476 | mei_header->me_addr = 0; |
| 477 | mei_header->length = sizeof(struct hbm_props_request); |
| 478 | mei_header->msg_complete = 1; |
| 479 | mei_header->reserved = 0; |
| 480 | |
| 481 | host_cli_req = (struct hbm_props_request *)&dev->wr_msg_buf[1]; |
| 482 | |
| 483 | memset(host_cli_req, 0, sizeof(struct hbm_props_request)); |
| 484 | |
Tomas Winkler | 1ca7e78 | 2012-02-26 23:18:57 +0200 | [diff] [blame] | 485 | host_cli_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 486 | host_cli_req->address = b; |
| 487 | |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 488 | if (mei_write_message(dev, mei_header, |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 489 | (unsigned char *)host_cli_req, |
| 490 | mei_header->length)) { |
| 491 | dev->mei_state = MEI_RESETING; |
| 492 | dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); |
| 493 | mei_reset(dev, 1); |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 494 | return -EIO; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; |
| 498 | dev->me_client_index = b; |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 499 | return 1; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 500 | } |
| 501 | |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 502 | return 0; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | /** |
| 506 | * mei_init_file_private - initializes private file structure. |
| 507 | * |
| 508 | * @priv: private file structure to be initialized |
| 509 | * @file: the file structure |
| 510 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 511 | void mei_cl_init(struct mei_cl *priv, struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 512 | { |
| 513 | memset(priv, 0, sizeof(struct mei_cl)); |
| 514 | init_waitqueue_head(&priv->wait); |
| 515 | init_waitqueue_head(&priv->rx_wait); |
| 516 | init_waitqueue_head(&priv->tx_wait); |
| 517 | INIT_LIST_HEAD(&priv->link); |
| 518 | priv->reading_state = MEI_IDLE; |
| 519 | priv->writing_state = MEI_IDLE; |
| 520 | priv->dev = dev; |
| 521 | } |
| 522 | |
| 523 | int mei_find_me_client_index(const struct mei_device *dev, uuid_le cuuid) |
| 524 | { |
| 525 | int i, res = -1; |
| 526 | |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 527 | for (i = 0; i < dev->me_clients_num; ++i) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 528 | if (uuid_le_cmp(cuuid, |
| 529 | dev->me_clients[i].props.protocol_name) == 0) { |
| 530 | res = i; |
| 531 | break; |
| 532 | } |
| 533 | |
| 534 | return res; |
| 535 | } |
| 536 | |
| 537 | |
| 538 | /** |
| 539 | * mei_find_me_client_update_filext - searches for ME client guid |
| 540 | * sets client_id in mei_file_private if found |
| 541 | * @dev: the device structure |
| 542 | * @priv: private file structure to set client_id in |
| 543 | * @cguid: searched guid of ME client |
| 544 | * @client_id: id of host client to be set in file private structure |
| 545 | * |
| 546 | * returns ME client index |
| 547 | */ |
| 548 | u8 mei_find_me_client_update_filext(struct mei_device *dev, struct mei_cl *priv, |
| 549 | const uuid_le *cguid, u8 client_id) |
| 550 | { |
| 551 | int i; |
| 552 | |
| 553 | if (!dev || !priv || !cguid) |
| 554 | return 0; |
| 555 | |
| 556 | /* check for valid client id */ |
| 557 | i = mei_find_me_client_index(dev, *cguid); |
| 558 | if (i >= 0) { |
| 559 | priv->me_client_id = dev->me_clients[i].client_id; |
| 560 | priv->state = MEI_FILE_CONNECTING; |
| 561 | priv->host_client_id = client_id; |
| 562 | |
| 563 | list_add_tail(&priv->link, &dev->file_list); |
| 564 | return (u8)i; |
| 565 | } |
| 566 | |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * host_init_iamthif - mei initialization iamthif client. |
| 572 | * |
| 573 | * @dev: the device structure |
| 574 | * |
| 575 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 576 | void mei_host_init_iamthif(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 577 | { |
| 578 | u8 i; |
| 579 | unsigned char *msg_buf; |
| 580 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 581 | mei_cl_init(&dev->iamthif_cl, dev); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 582 | dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; |
| 583 | |
| 584 | /* find ME amthi client */ |
| 585 | i = mei_find_me_client_update_filext(dev, &dev->iamthif_cl, |
| 586 | &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID); |
| 587 | if (dev->iamthif_cl.state != MEI_FILE_CONNECTING) { |
| 588 | dev_dbg(&dev->pdev->dev, "failed to find iamthif client.\n"); |
| 589 | return; |
| 590 | } |
| 591 | |
Tomas Winkler | c9667bf | 2011-12-13 23:39:33 +0200 | [diff] [blame] | 592 | /* Assign iamthif_mtu to the value received from ME */ |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 593 | |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 594 | dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length; |
Tomas Winkler | c9667bf | 2011-12-13 23:39:33 +0200 | [diff] [blame] | 595 | dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n", |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 596 | dev->me_clients[i].props.max_msg_length); |
| 597 | |
| 598 | kfree(dev->iamthif_msg_buf); |
| 599 | dev->iamthif_msg_buf = NULL; |
| 600 | |
| 601 | /* allocate storage for ME message buffer */ |
| 602 | msg_buf = kcalloc(dev->iamthif_mtu, |
| 603 | sizeof(unsigned char), GFP_KERNEL); |
| 604 | if (!msg_buf) { |
| 605 | dev_dbg(&dev->pdev->dev, "memory allocation for ME message buffer failed.\n"); |
| 606 | return; |
| 607 | } |
| 608 | |
| 609 | dev->iamthif_msg_buf = msg_buf; |
| 610 | |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 611 | if (mei_connect(dev, &dev->iamthif_cl)) { |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 612 | dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n"); |
| 613 | dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; |
| 614 | dev->iamthif_cl.host_client_id = 0; |
| 615 | } else { |
| 616 | dev->iamthif_cl.timer_count = CONNECT_TIMEOUT; |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | /** |
| 621 | * mei_alloc_file_private - allocates a private file structure and sets it up. |
| 622 | * @file: the file structure |
| 623 | * |
| 624 | * returns The allocated file or NULL on failure |
| 625 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 626 | struct mei_cl *mei_cl_allocate(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 627 | { |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 628 | struct mei_cl *cl; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 629 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 630 | cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL); |
| 631 | if (!cl) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 632 | return NULL; |
| 633 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 634 | mei_cl_init(cl, dev); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 635 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 636 | return cl; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | |
| 640 | |
| 641 | /** |
| 642 | * mei_disconnect_host_client - sends disconnect message to fw from host client. |
| 643 | * |
| 644 | * @dev: the device structure |
| 645 | * @cl: private data of the file object |
| 646 | * |
| 647 | * Locking: called under "dev->device_lock" lock |
| 648 | * |
| 649 | * returns 0 on success, <0 on failure. |
| 650 | */ |
| 651 | int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl) |
| 652 | { |
| 653 | int rets, err; |
| 654 | long timeout = 15; /* 15 seconds */ |
| 655 | struct mei_cl_cb *cb; |
| 656 | |
| 657 | if (!dev || !cl) |
| 658 | return -ENODEV; |
| 659 | |
| 660 | if (cl->state != MEI_FILE_DISCONNECTING) |
| 661 | return 0; |
| 662 | |
| 663 | cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); |
| 664 | if (!cb) |
| 665 | return -ENOMEM; |
| 666 | |
| 667 | INIT_LIST_HEAD(&cb->cb_list); |
| 668 | cb->file_private = cl; |
| 669 | cb->major_file_operations = MEI_CLOSE; |
| 670 | if (dev->mei_host_buffer_is_empty) { |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 671 | dev->mei_host_buffer_is_empty = false; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 672 | if (mei_disconnect(dev, cl)) { |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 673 | rets = -ENODEV; |
| 674 | dev_dbg(&dev->pdev->dev, "failed to call mei_disconnect.\n"); |
| 675 | goto free; |
| 676 | } |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 677 | mdelay(10); /* Wait for hardware disconnection ready */ |
| 678 | list_add_tail(&cb->cb_list, &dev->ctrl_rd_list.mei_cb.cb_list); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 679 | } else { |
| 680 | dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n"); |
| 681 | list_add_tail(&cb->cb_list, |
| 682 | &dev->ctrl_wr_list.mei_cb.cb_list); |
| 683 | } |
| 684 | mutex_unlock(&dev->device_lock); |
| 685 | |
| 686 | err = wait_event_timeout(dev->wait_recvd_msg, |
| 687 | (MEI_FILE_DISCONNECTED == cl->state), |
| 688 | timeout * HZ); |
| 689 | |
| 690 | mutex_lock(&dev->device_lock); |
| 691 | if (MEI_FILE_DISCONNECTED == cl->state) { |
| 692 | rets = 0; |
| 693 | dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n"); |
| 694 | } else { |
| 695 | rets = -ENODEV; |
| 696 | if (MEI_FILE_DISCONNECTED != cl->state) |
| 697 | dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n"); |
| 698 | |
| 699 | if (err) |
| 700 | dev_dbg(&dev->pdev->dev, |
| 701 | "wait failed disconnect err=%08x\n", |
| 702 | err); |
| 703 | |
| 704 | dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n"); |
| 705 | } |
| 706 | |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 707 | mei_io_list_flush(&dev->ctrl_rd_list, cl); |
| 708 | mei_io_list_flush(&dev->ctrl_wr_list, cl); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 709 | free: |
| 710 | mei_free_cb_private(cb); |
| 711 | return rets; |
| 712 | } |
| 713 | |
| 714 | /** |
| 715 | * mei_remove_client_from_file_list - |
| 716 | * removes file private data from device file list |
| 717 | * |
| 718 | * @dev: the device structure |
| 719 | * @host_client_id: host client id to be removed |
| 720 | */ |
| 721 | void mei_remove_client_from_file_list(struct mei_device *dev, |
| 722 | u8 host_client_id) |
| 723 | { |
| 724 | struct mei_cl *cl_pos = NULL; |
| 725 | struct mei_cl *cl_next = NULL; |
| 726 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { |
| 727 | if (host_client_id == cl_pos->host_client_id) { |
| 728 | dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n", |
| 729 | cl_pos->host_client_id, |
| 730 | cl_pos->me_client_id); |
| 731 | list_del_init(&cl_pos->link); |
| 732 | break; |
| 733 | } |
| 734 | } |
| 735 | } |