Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Intel Management Engine Interface (Intel MEI) Linux driver |
| 4 | * Copyright (c) 2003-2011, 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/delay.h> |
| 21 | |
| 22 | #include "mei_dev.h" |
| 23 | #include "hw.h" |
| 24 | #include "interface.h" |
| 25 | #include "mei.h" |
| 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 | |
| 203 | printk(KERN_ERR "mei: link layer initialization failed.\n"); |
| 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)); |
| 365 | host_start_req->cmd.cmd = HOST_START_REQ_CMD; |
| 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; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 369 | if (!mei_write_message(dev, mei_hdr, |
| 370 | (unsigned char *) (host_start_req), |
| 371 | mei_hdr->length)) { |
| 372 | dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); |
| 373 | dev->mei_state = MEI_RESETING; |
| 374 | mei_reset(dev, 1); |
| 375 | } |
| 376 | dev->init_clients_state = MEI_START_MESSAGE; |
| 377 | dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; |
| 378 | return ; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * host_enum_clients_message - host sends enumeration client request message. |
| 383 | * |
| 384 | * @dev: the device structure |
| 385 | * |
| 386 | * returns none. |
| 387 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 388 | void mei_host_enum_clients_message(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 389 | { |
| 390 | struct mei_msg_hdr *mei_hdr; |
| 391 | struct hbm_host_enum_request *host_enum_req; |
| 392 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; |
| 393 | /* enumerate clients */ |
| 394 | mei_hdr->host_addr = 0; |
| 395 | mei_hdr->me_addr = 0; |
| 396 | mei_hdr->length = sizeof(struct hbm_host_enum_request); |
| 397 | mei_hdr->msg_complete = 1; |
| 398 | mei_hdr->reserved = 0; |
| 399 | |
| 400 | host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1]; |
| 401 | memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request)); |
| 402 | host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD; |
| 403 | if (!mei_write_message(dev, mei_hdr, |
| 404 | (unsigned char *) (host_enum_req), |
| 405 | mei_hdr->length)) { |
| 406 | dev->mei_state = MEI_RESETING; |
| 407 | dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); |
| 408 | mei_reset(dev, 1); |
| 409 | } |
| 410 | dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE; |
| 411 | dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; |
| 412 | return ; |
| 413 | } |
| 414 | |
| 415 | |
| 416 | /** |
| 417 | * allocate_me_clients_storage - allocates storage for me clients |
| 418 | * |
| 419 | * @dev: the device structure |
| 420 | * |
| 421 | * returns none. |
| 422 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 423 | void mei_allocate_me_clients_storage(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 424 | { |
| 425 | struct mei_me_client *clients; |
| 426 | int b; |
| 427 | |
| 428 | /* count how many ME clients we have */ |
| 429 | for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX) |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 430 | dev->me_clients_num++; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 431 | |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 432 | if (dev->me_clients_num <= 0) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 433 | return ; |
| 434 | |
| 435 | |
| 436 | if (dev->me_clients != NULL) { |
| 437 | kfree(dev->me_clients); |
| 438 | dev->me_clients = NULL; |
| 439 | } |
| 440 | 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] | 441 | dev->me_clients_num * sizeof(struct mei_me_client)); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 442 | /* allocate storage for ME clients representation */ |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 443 | clients = kcalloc(dev->me_clients_num, |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 444 | sizeof(struct mei_me_client), GFP_KERNEL); |
| 445 | if (!clients) { |
| 446 | dev_dbg(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); |
| 447 | dev->mei_state = MEI_RESETING; |
| 448 | mei_reset(dev, 1); |
| 449 | return ; |
| 450 | } |
| 451 | dev->me_clients = clients; |
| 452 | return ; |
| 453 | } |
| 454 | /** |
| 455 | * host_client_properties - reads properties for client |
| 456 | * |
| 457 | * @dev: the device structure |
| 458 | * |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 459 | * returns: |
| 460 | * < 0 - Error. |
| 461 | * = 0 - no more clients. |
| 462 | * = 1 - still have clients to send properties request. |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 463 | */ |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 464 | int mei_host_client_properties(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 465 | { |
| 466 | struct mei_msg_hdr *mei_header; |
| 467 | struct hbm_props_request *host_cli_req; |
| 468 | int b; |
| 469 | u8 client_num = dev->me_client_presentation_num; |
| 470 | |
| 471 | b = dev->me_client_index; |
| 472 | b = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, b); |
| 473 | if (b < MEI_CLIENTS_MAX) { |
| 474 | dev->me_clients[client_num].client_id = b; |
| 475 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; |
| 476 | mei_header = (struct mei_msg_hdr *)&dev->wr_msg_buf[0]; |
| 477 | mei_header->host_addr = 0; |
| 478 | mei_header->me_addr = 0; |
| 479 | mei_header->length = sizeof(struct hbm_props_request); |
| 480 | mei_header->msg_complete = 1; |
| 481 | mei_header->reserved = 0; |
| 482 | |
| 483 | host_cli_req = (struct hbm_props_request *)&dev->wr_msg_buf[1]; |
| 484 | |
| 485 | memset(host_cli_req, 0, sizeof(struct hbm_props_request)); |
| 486 | |
| 487 | host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
| 488 | host_cli_req->address = b; |
| 489 | |
| 490 | if (!mei_write_message(dev, mei_header, |
| 491 | (unsigned char *)host_cli_req, |
| 492 | mei_header->length)) { |
| 493 | dev->mei_state = MEI_RESETING; |
| 494 | dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); |
| 495 | mei_reset(dev, 1); |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 496 | return -EIO; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | dev->init_clients_timer = INIT_CLIENTS_TIMEOUT; |
| 500 | dev->me_client_index = b; |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 501 | return 1; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 502 | } |
| 503 | |
Oren Weil | abc51b6 | 2011-09-21 16:45:30 +0300 | [diff] [blame] | 504 | return 0; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | /** |
| 508 | * mei_init_file_private - initializes private file structure. |
| 509 | * |
| 510 | * @priv: private file structure to be initialized |
| 511 | * @file: the file structure |
| 512 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 513 | void mei_cl_init(struct mei_cl *priv, struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 514 | { |
| 515 | memset(priv, 0, sizeof(struct mei_cl)); |
| 516 | init_waitqueue_head(&priv->wait); |
| 517 | init_waitqueue_head(&priv->rx_wait); |
| 518 | init_waitqueue_head(&priv->tx_wait); |
| 519 | INIT_LIST_HEAD(&priv->link); |
| 520 | priv->reading_state = MEI_IDLE; |
| 521 | priv->writing_state = MEI_IDLE; |
| 522 | priv->dev = dev; |
| 523 | } |
| 524 | |
| 525 | int mei_find_me_client_index(const struct mei_device *dev, uuid_le cuuid) |
| 526 | { |
| 527 | int i, res = -1; |
| 528 | |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 529 | for (i = 0; i < dev->me_clients_num; ++i) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 530 | if (uuid_le_cmp(cuuid, |
| 531 | dev->me_clients[i].props.protocol_name) == 0) { |
| 532 | res = i; |
| 533 | break; |
| 534 | } |
| 535 | |
| 536 | return res; |
| 537 | } |
| 538 | |
| 539 | |
| 540 | /** |
| 541 | * mei_find_me_client_update_filext - searches for ME client guid |
| 542 | * sets client_id in mei_file_private if found |
| 543 | * @dev: the device structure |
| 544 | * @priv: private file structure to set client_id in |
| 545 | * @cguid: searched guid of ME client |
| 546 | * @client_id: id of host client to be set in file private structure |
| 547 | * |
| 548 | * returns ME client index |
| 549 | */ |
| 550 | u8 mei_find_me_client_update_filext(struct mei_device *dev, struct mei_cl *priv, |
| 551 | const uuid_le *cguid, u8 client_id) |
| 552 | { |
| 553 | int i; |
| 554 | |
| 555 | if (!dev || !priv || !cguid) |
| 556 | return 0; |
| 557 | |
| 558 | /* check for valid client id */ |
| 559 | i = mei_find_me_client_index(dev, *cguid); |
| 560 | if (i >= 0) { |
| 561 | priv->me_client_id = dev->me_clients[i].client_id; |
| 562 | priv->state = MEI_FILE_CONNECTING; |
| 563 | priv->host_client_id = client_id; |
| 564 | |
| 565 | list_add_tail(&priv->link, &dev->file_list); |
| 566 | return (u8)i; |
| 567 | } |
| 568 | |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | /** |
| 573 | * host_init_iamthif - mei initialization iamthif client. |
| 574 | * |
| 575 | * @dev: the device structure |
| 576 | * |
| 577 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 578 | void mei_host_init_iamthif(struct mei_device *dev) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 579 | { |
| 580 | u8 i; |
| 581 | unsigned char *msg_buf; |
| 582 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 583 | mei_cl_init(&dev->iamthif_cl, dev); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 584 | dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; |
| 585 | |
| 586 | /* find ME amthi client */ |
| 587 | i = mei_find_me_client_update_filext(dev, &dev->iamthif_cl, |
| 588 | &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID); |
| 589 | if (dev->iamthif_cl.state != MEI_FILE_CONNECTING) { |
| 590 | dev_dbg(&dev->pdev->dev, "failed to find iamthif client.\n"); |
| 591 | return; |
| 592 | } |
| 593 | |
Tomas Winkler | c9667bf | 2011-12-13 23:39:33 +0200 | [diff] [blame^] | 594 | /* Assign iamthif_mtu to the value received from ME */ |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 595 | |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 596 | dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length; |
Tomas Winkler | c9667bf | 2011-12-13 23:39:33 +0200 | [diff] [blame^] | 597 | dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n", |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 598 | dev->me_clients[i].props.max_msg_length); |
| 599 | |
| 600 | kfree(dev->iamthif_msg_buf); |
| 601 | dev->iamthif_msg_buf = NULL; |
| 602 | |
| 603 | /* allocate storage for ME message buffer */ |
| 604 | msg_buf = kcalloc(dev->iamthif_mtu, |
| 605 | sizeof(unsigned char), GFP_KERNEL); |
| 606 | if (!msg_buf) { |
| 607 | dev_dbg(&dev->pdev->dev, "memory allocation for ME message buffer failed.\n"); |
| 608 | return; |
| 609 | } |
| 610 | |
| 611 | dev->iamthif_msg_buf = msg_buf; |
| 612 | |
| 613 | if (!mei_connect(dev, &dev->iamthif_cl)) { |
| 614 | dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n"); |
| 615 | dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; |
| 616 | dev->iamthif_cl.host_client_id = 0; |
| 617 | } else { |
| 618 | dev->iamthif_cl.timer_count = CONNECT_TIMEOUT; |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | /** |
| 623 | * mei_alloc_file_private - allocates a private file structure and sets it up. |
| 624 | * @file: the file structure |
| 625 | * |
| 626 | * returns The allocated file or NULL on failure |
| 627 | */ |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 628 | struct mei_cl *mei_cl_allocate(struct mei_device *dev) |
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 | struct mei_cl *cl; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 631 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 632 | cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL); |
| 633 | if (!cl) |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 634 | return NULL; |
| 635 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 636 | mei_cl_init(cl, dev); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 637 | |
Tomas Winkler | c95efb7 | 2011-05-25 17:28:21 +0300 | [diff] [blame] | 638 | return cl; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | |
| 642 | |
| 643 | /** |
| 644 | * mei_disconnect_host_client - sends disconnect message to fw from host client. |
| 645 | * |
| 646 | * @dev: the device structure |
| 647 | * @cl: private data of the file object |
| 648 | * |
| 649 | * Locking: called under "dev->device_lock" lock |
| 650 | * |
| 651 | * returns 0 on success, <0 on failure. |
| 652 | */ |
| 653 | int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl) |
| 654 | { |
| 655 | int rets, err; |
| 656 | long timeout = 15; /* 15 seconds */ |
| 657 | struct mei_cl_cb *cb; |
| 658 | |
| 659 | if (!dev || !cl) |
| 660 | return -ENODEV; |
| 661 | |
| 662 | if (cl->state != MEI_FILE_DISCONNECTING) |
| 663 | return 0; |
| 664 | |
| 665 | cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); |
| 666 | if (!cb) |
| 667 | return -ENOMEM; |
| 668 | |
| 669 | INIT_LIST_HEAD(&cb->cb_list); |
| 670 | cb->file_private = cl; |
| 671 | cb->major_file_operations = MEI_CLOSE; |
| 672 | if (dev->mei_host_buffer_is_empty) { |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 673 | dev->mei_host_buffer_is_empty = false; |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 674 | if (mei_disconnect(dev, cl)) { |
| 675 | mdelay(10); /* Wait for hardware disconnection ready */ |
| 676 | list_add_tail(&cb->cb_list, |
| 677 | &dev->ctrl_rd_list.mei_cb.cb_list); |
| 678 | } else { |
| 679 | rets = -ENODEV; |
| 680 | dev_dbg(&dev->pdev->dev, "failed to call mei_disconnect.\n"); |
| 681 | goto free; |
| 682 | } |
| 683 | } else { |
| 684 | dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n"); |
| 685 | list_add_tail(&cb->cb_list, |
| 686 | &dev->ctrl_wr_list.mei_cb.cb_list); |
| 687 | } |
| 688 | mutex_unlock(&dev->device_lock); |
| 689 | |
| 690 | err = wait_event_timeout(dev->wait_recvd_msg, |
| 691 | (MEI_FILE_DISCONNECTED == cl->state), |
| 692 | timeout * HZ); |
| 693 | |
| 694 | mutex_lock(&dev->device_lock); |
| 695 | if (MEI_FILE_DISCONNECTED == cl->state) { |
| 696 | rets = 0; |
| 697 | dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n"); |
| 698 | } else { |
| 699 | rets = -ENODEV; |
| 700 | if (MEI_FILE_DISCONNECTED != cl->state) |
| 701 | dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n"); |
| 702 | |
| 703 | if (err) |
| 704 | dev_dbg(&dev->pdev->dev, |
| 705 | "wait failed disconnect err=%08x\n", |
| 706 | err); |
| 707 | |
| 708 | dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n"); |
| 709 | } |
| 710 | |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 711 | mei_io_list_flush(&dev->ctrl_rd_list, cl); |
| 712 | mei_io_list_flush(&dev->ctrl_wr_list, cl); |
Oren Weil | 91f01c6 | 2011-05-15 13:43:44 +0300 | [diff] [blame] | 713 | free: |
| 714 | mei_free_cb_private(cb); |
| 715 | return rets; |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * mei_remove_client_from_file_list - |
| 720 | * removes file private data from device file list |
| 721 | * |
| 722 | * @dev: the device structure |
| 723 | * @host_client_id: host client id to be removed |
| 724 | */ |
| 725 | void mei_remove_client_from_file_list(struct mei_device *dev, |
| 726 | u8 host_client_id) |
| 727 | { |
| 728 | struct mei_cl *cl_pos = NULL; |
| 729 | struct mei_cl *cl_next = NULL; |
| 730 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { |
| 731 | if (host_client_id == cl_pos->host_client_id) { |
| 732 | dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n", |
| 733 | cl_pos->host_client_id, |
| 734 | cl_pos->me_client_id); |
| 735 | list_del_init(&cl_pos->link); |
| 736 | break; |
| 737 | } |
| 738 | } |
| 739 | } |