Oren Weil | fb7d879 | 2011-05-15 13:43:42 +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 | fb7d879 | 2011-05-15 13:43:42 +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 | |
| 18 | #include <linux/pci.h> |
| 19 | #include <linux/kthread.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/fs.h> |
| 22 | #include <linux/jiffies.h> |
| 23 | |
Tomas Winkler | 4f3afe1 | 2012-05-09 16:38:59 +0300 | [diff] [blame] | 24 | #include <linux/mei.h> |
Tomas Winkler | 47a7380 | 2012-12-25 19:06:03 +0200 | [diff] [blame] | 25 | |
| 26 | #include "mei_dev.h" |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 27 | #include "interface.h" |
| 28 | |
| 29 | |
| 30 | /** |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 31 | * _mei_cmpl - processes completed operation. |
| 32 | * |
| 33 | * @cl: private data of the file object. |
| 34 | * @cb_pos: callback block. |
| 35 | */ |
| 36 | static void _mei_cmpl(struct mei_cl *cl, struct mei_cl_cb *cb_pos) |
| 37 | { |
Tomas Winkler | 4b8960b | 2012-11-11 17:38:00 +0200 | [diff] [blame] | 38 | if (cb_pos->fop_type == MEI_FOP_WRITE) { |
Tomas Winkler | 601a1ef | 2012-10-09 16:50:20 +0200 | [diff] [blame] | 39 | mei_io_cb_free(cb_pos); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 40 | cb_pos = NULL; |
| 41 | cl->writing_state = MEI_WRITE_COMPLETE; |
| 42 | if (waitqueue_active(&cl->tx_wait)) |
| 43 | wake_up_interruptible(&cl->tx_wait); |
| 44 | |
Tomas Winkler | 4b8960b | 2012-11-11 17:38:00 +0200 | [diff] [blame] | 45 | } else if (cb_pos->fop_type == MEI_FOP_READ && |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 46 | MEI_READING == cl->reading_state) { |
| 47 | cl->reading_state = MEI_READ_COMPLETE; |
| 48 | if (waitqueue_active(&cl->rx_wait)) |
| 49 | wake_up_interruptible(&cl->rx_wait); |
| 50 | |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | /** |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 55 | * _mei_irq_thread_state_ok - checks if mei header matches file private data |
| 56 | * |
| 57 | * @cl: private data of the file object |
| 58 | * @mei_hdr: header of mei client message |
| 59 | * |
| 60 | * returns !=0 if matches, 0 if no match. |
| 61 | */ |
| 62 | static int _mei_irq_thread_state_ok(struct mei_cl *cl, |
| 63 | struct mei_msg_hdr *mei_hdr) |
| 64 | { |
| 65 | return (cl->host_client_id == mei_hdr->host_addr && |
| 66 | cl->me_client_id == mei_hdr->me_addr && |
| 67 | cl->state == MEI_FILE_CONNECTED && |
| 68 | MEI_READ_COMPLETE != cl->reading_state); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * mei_irq_thread_read_client_message - bottom half read routine after ISR to |
| 73 | * handle the read mei client message data processing. |
| 74 | * |
| 75 | * @complete_list: An instance of our list structure |
| 76 | * @dev: the device structure |
| 77 | * @mei_hdr: header of mei client message |
| 78 | * |
| 79 | * returns 0 on success, <0 on failure. |
| 80 | */ |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 81 | static int mei_irq_thread_read_client_message(struct mei_cl_cb *complete_list, |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 82 | struct mei_device *dev, |
| 83 | struct mei_msg_hdr *mei_hdr) |
| 84 | { |
| 85 | struct mei_cl *cl; |
| 86 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; |
Tomas Winkler | 479bc59 | 2011-06-16 00:46:03 +0300 | [diff] [blame] | 87 | unsigned char *buffer = NULL; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 88 | |
| 89 | dev_dbg(&dev->pdev->dev, "start client msg\n"); |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 90 | if (list_empty(&dev->read_list.list)) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 91 | goto quit; |
| 92 | |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 93 | list_for_each_entry_safe(cb_pos, cb_next, &dev->read_list.list, list) { |
Tomas Winkler | db3ed43 | 2012-11-11 17:37:59 +0200 | [diff] [blame] | 94 | cl = cb_pos->cl; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 95 | if (cl && _mei_irq_thread_state_ok(cl, mei_hdr)) { |
| 96 | cl->reading_state = MEI_READING; |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 97 | buffer = cb_pos->response_buffer.data + cb_pos->buf_idx; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 98 | |
| 99 | if (cb_pos->response_buffer.size < |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 100 | mei_hdr->length + cb_pos->buf_idx) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 101 | dev_dbg(&dev->pdev->dev, "message overflow.\n"); |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 102 | list_del(&cb_pos->list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 103 | return -ENOMEM; |
| 104 | } |
| 105 | if (buffer) |
| 106 | mei_read_slots(dev, buffer, mei_hdr->length); |
| 107 | |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 108 | cb_pos->buf_idx += mei_hdr->length; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 109 | if (mei_hdr->msg_complete) { |
| 110 | cl->status = 0; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 111 | list_del(&cb_pos->list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 112 | dev_dbg(&dev->pdev->dev, |
Tomas Winkler | a4136b4 | 2012-09-11 00:43:22 +0300 | [diff] [blame] | 113 | "completed read H cl = %d, ME cl = %d, length = %lu\n", |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 114 | cl->host_client_id, |
| 115 | cl->me_client_id, |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 116 | cb_pos->buf_idx); |
| 117 | |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 118 | list_add_tail(&cb_pos->list, |
| 119 | &complete_list->list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | break; |
| 123 | } |
| 124 | |
| 125 | } |
| 126 | |
| 127 | quit: |
| 128 | dev_dbg(&dev->pdev->dev, "message read\n"); |
| 129 | if (!buffer) { |
Tomas Winkler | edf1eed | 2012-02-09 19:25:54 +0200 | [diff] [blame] | 130 | mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); |
Tomas Winkler | 15d4acc | 2012-12-25 19:06:00 +0200 | [diff] [blame] | 131 | dev_dbg(&dev->pdev->dev, "discarding message " MEI_HDR_FMT "\n", |
| 132 | MEI_HDR_PRM(mei_hdr)); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | /** |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 139 | * _mei_irq_thread_close - processes close related operation. |
| 140 | * |
| 141 | * @dev: the device structure. |
| 142 | * @slots: free slots. |
| 143 | * @cb_pos: callback block. |
| 144 | * @cl: private data of the file object. |
| 145 | * @cmpl_list: complete list. |
| 146 | * |
| 147 | * returns 0, OK; otherwise, error. |
| 148 | */ |
| 149 | static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots, |
| 150 | struct mei_cl_cb *cb_pos, |
| 151 | struct mei_cl *cl, |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 152 | struct mei_cl_cb *cmpl_list) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 153 | { |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 154 | if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) + |
Tomas Winkler | aeba4a0 | 2012-11-11 17:38:04 +0200 | [diff] [blame] | 155 | sizeof(struct hbm_client_connect_request))) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 156 | return -EBADMSG; |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 157 | |
Tomas Winkler | aeba4a0 | 2012-11-11 17:38:04 +0200 | [diff] [blame] | 158 | *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request)); |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 159 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame^] | 160 | if (mei_hbm_cl_disconnect_req(dev, cl)) { |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 161 | cl->status = 0; |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 162 | cb_pos->buf_idx = 0; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 163 | list_move_tail(&cb_pos->list, &cmpl_list->list); |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 164 | return -EMSGSIZE; |
| 165 | } else { |
| 166 | cl->state = MEI_FILE_DISCONNECTING; |
| 167 | cl->status = 0; |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 168 | cb_pos->buf_idx = 0; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 169 | list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list); |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 170 | cl->timer_count = MEI_CONNECT_TIMEOUT; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * is_treat_specially_client - checks if the message belongs |
| 178 | * to the file private data. |
| 179 | * |
| 180 | * @cl: private data of the file object |
| 181 | * @rs: connect response bus message |
| 182 | * |
| 183 | */ |
| 184 | static bool is_treat_specially_client(struct mei_cl *cl, |
| 185 | struct hbm_client_connect_response *rs) |
| 186 | { |
| 187 | |
| 188 | if (cl->host_client_id == rs->host_addr && |
| 189 | cl->me_client_id == rs->me_addr) { |
| 190 | if (!rs->status) { |
| 191 | cl->state = MEI_FILE_CONNECTED; |
| 192 | cl->status = 0; |
| 193 | |
| 194 | } else { |
| 195 | cl->state = MEI_FILE_DISCONNECTED; |
| 196 | cl->status = -ENODEV; |
| 197 | } |
| 198 | cl->timer_count = 0; |
| 199 | |
| 200 | return true; |
| 201 | } |
| 202 | return false; |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * mei_client_connect_response - connects to response irq routine |
| 207 | * |
| 208 | * @dev: the device structure |
| 209 | * @rs: connect response bus message |
| 210 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 211 | void mei_client_connect_response(struct mei_device *dev, |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 212 | struct hbm_client_connect_response *rs) |
| 213 | { |
| 214 | |
| 215 | struct mei_cl *cl; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 216 | struct mei_cl_cb *pos = NULL, *next = NULL; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 217 | |
| 218 | dev_dbg(&dev->pdev->dev, |
| 219 | "connect_response:\n" |
| 220 | "ME Client = %d\n" |
| 221 | "Host Client = %d\n" |
| 222 | "Status = %d\n", |
| 223 | rs->me_addr, |
| 224 | rs->host_addr, |
| 225 | rs->status); |
| 226 | |
| 227 | /* if WD or iamthif client treat specially */ |
| 228 | |
| 229 | if (is_treat_specially_client(&(dev->wd_cl), rs)) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 230 | dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); |
Tomas Winkler | 70cd533 | 2011-12-22 18:50:50 +0200 | [diff] [blame] | 231 | mei_watchdog_register(dev); |
Oren Weil | 9ce178e | 2011-09-07 09:03:09 +0300 | [diff] [blame] | 232 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 233 | return; |
| 234 | } |
| 235 | |
| 236 | if (is_treat_specially_client(&(dev->iamthif_cl), rs)) { |
| 237 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
| 238 | return; |
| 239 | } |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 240 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 241 | |
Tomas Winkler | db3ed43 | 2012-11-11 17:37:59 +0200 | [diff] [blame] | 242 | cl = pos->cl; |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 243 | if (!cl) { |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 244 | list_del(&pos->list); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 245 | return; |
| 246 | } |
Tomas Winkler | 4b8960b | 2012-11-11 17:38:00 +0200 | [diff] [blame] | 247 | if (pos->fop_type == MEI_FOP_IOCTL) { |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 248 | if (is_treat_specially_client(cl, rs)) { |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 249 | list_del(&pos->list); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 250 | cl->status = 0; |
| 251 | cl->timer_count = 0; |
| 252 | break; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 253 | } |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * mei_client_disconnect_response - disconnects from response irq routine |
| 260 | * |
| 261 | * @dev: the device structure |
| 262 | * @rs: disconnect response bus message |
| 263 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 264 | void mei_client_disconnect_response(struct mei_device *dev, |
| 265 | struct hbm_client_connect_response *rs) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 266 | { |
| 267 | struct mei_cl *cl; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 268 | struct mei_cl_cb *pos = NULL, *next = NULL; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 269 | |
| 270 | dev_dbg(&dev->pdev->dev, |
| 271 | "disconnect_response:\n" |
| 272 | "ME Client = %d\n" |
| 273 | "Host Client = %d\n" |
| 274 | "Status = %d\n", |
| 275 | rs->me_addr, |
| 276 | rs->host_addr, |
| 277 | rs->status); |
| 278 | |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 279 | list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { |
Tomas Winkler | db3ed43 | 2012-11-11 17:37:59 +0200 | [diff] [blame] | 280 | cl = pos->cl; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 281 | |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 282 | if (!cl) { |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 283 | list_del(&pos->list); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 284 | return; |
| 285 | } |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 286 | |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 287 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); |
| 288 | if (cl->host_client_id == rs->host_addr && |
| 289 | cl->me_client_id == rs->me_addr) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 290 | |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 291 | list_del(&pos->list); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 292 | if (!rs->status) |
| 293 | cl->state = MEI_FILE_DISCONNECTED; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 294 | |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 295 | cl->status = 0; |
| 296 | cl->timer_count = 0; |
| 297 | break; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 298 | } |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * same_flow_addr - tells if they have the same address. |
| 304 | * |
| 305 | * @file: private data of the file object. |
| 306 | * @flow: flow control. |
| 307 | * |
| 308 | * returns !=0, same; 0,not. |
| 309 | */ |
| 310 | static int same_flow_addr(struct mei_cl *cl, struct hbm_flow_control *flow) |
| 311 | { |
| 312 | return (cl->host_client_id == flow->host_addr && |
| 313 | cl->me_client_id == flow->me_addr); |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * add_single_flow_creds - adds single buffer credentials. |
| 318 | * |
| 319 | * @file: private data ot the file object. |
| 320 | * @flow: flow control. |
| 321 | */ |
| 322 | static void add_single_flow_creds(struct mei_device *dev, |
| 323 | struct hbm_flow_control *flow) |
| 324 | { |
| 325 | struct mei_me_client *client; |
| 326 | int i; |
| 327 | |
Tomas Winkler | cf9673d | 2011-06-06 10:44:33 +0300 | [diff] [blame] | 328 | for (i = 0; i < dev->me_clients_num; i++) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 329 | client = &dev->me_clients[i]; |
| 330 | if (client && flow->me_addr == client->client_id) { |
| 331 | if (client->props.single_recv_buf) { |
| 332 | client->mei_flow_ctrl_creds++; |
| 333 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", |
| 334 | flow->me_addr); |
| 335 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", |
| 336 | client->mei_flow_ctrl_creds); |
| 337 | } else { |
| 338 | BUG(); /* error in flow control */ |
| 339 | } |
| 340 | } |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * mei_client_flow_control_response - flow control response irq routine |
| 346 | * |
| 347 | * @dev: the device structure |
| 348 | * @flow_control: flow control response bus message |
| 349 | */ |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 350 | void mei_client_flow_control_response(struct mei_device *dev, |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 351 | struct hbm_flow_control *flow_control) |
| 352 | { |
| 353 | struct mei_cl *cl_pos = NULL; |
| 354 | struct mei_cl *cl_next = NULL; |
| 355 | |
| 356 | if (!flow_control->host_addr) { |
| 357 | /* single receive buffer */ |
| 358 | add_single_flow_creds(dev, flow_control); |
| 359 | } else { |
| 360 | /* normal connection */ |
| 361 | list_for_each_entry_safe(cl_pos, cl_next, |
| 362 | &dev->file_list, link) { |
| 363 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in file_list\n"); |
| 364 | |
| 365 | dev_dbg(&dev->pdev->dev, "cl of host client %d ME client %d.\n", |
| 366 | cl_pos->host_client_id, |
| 367 | cl_pos->me_client_id); |
| 368 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", |
| 369 | flow_control->host_addr, |
| 370 | flow_control->me_addr); |
| 371 | if (same_flow_addr(cl_pos, flow_control)) { |
| 372 | dev_dbg(&dev->pdev->dev, "recv ctrl msg for host %d ME %d.\n", |
| 373 | flow_control->host_addr, |
| 374 | flow_control->me_addr); |
| 375 | cl_pos->mei_flow_ctrl_creds++; |
| 376 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", |
| 377 | cl_pos->mei_flow_ctrl_creds); |
| 378 | break; |
| 379 | } |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 384 | |
| 385 | /** |
| 386 | * _mei_hb_read - processes read related operation. |
| 387 | * |
| 388 | * @dev: the device structure. |
| 389 | * @slots: free slots. |
| 390 | * @cb_pos: callback block. |
| 391 | * @cl: private data of the file object. |
| 392 | * @cmpl_list: complete list. |
| 393 | * |
| 394 | * returns 0, OK; otherwise, error. |
| 395 | */ |
| 396 | static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots, |
| 397 | struct mei_cl_cb *cb_pos, |
| 398 | struct mei_cl *cl, |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 399 | struct mei_cl_cb *cmpl_list) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 400 | { |
Tomas Winkler | 1e69d64 | 2012-05-29 16:39:12 +0300 | [diff] [blame] | 401 | if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) + |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 402 | sizeof(struct hbm_flow_control))) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 403 | /* return the cancel routine */ |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 404 | list_del(&cb_pos->list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 405 | return -EBADMSG; |
| 406 | } |
| 407 | |
Tomas Winkler | 7bdf72d | 2012-07-04 19:24:52 +0300 | [diff] [blame] | 408 | *slots -= mei_data2slots(sizeof(struct hbm_flow_control)); |
| 409 | |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame^] | 410 | if (mei_hbm_cl_flow_control_req(dev, cl)) { |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 411 | cl->status = -ENODEV; |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 412 | cb_pos->buf_idx = 0; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 413 | list_move_tail(&cb_pos->list, &cmpl_list->list); |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 414 | return -ENODEV; |
| 415 | } |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 416 | list_move_tail(&cb_pos->list, &dev->read_list.list); |
Tomas Winkler | 1ccb7b6 | 2012-03-14 14:39:42 +0200 | [diff] [blame] | 417 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | |
| 422 | /** |
| 423 | * _mei_irq_thread_ioctl - processes ioctl related operation. |
| 424 | * |
| 425 | * @dev: the device structure. |
| 426 | * @slots: free slots. |
| 427 | * @cb_pos: callback block. |
| 428 | * @cl: private data of the file object. |
| 429 | * @cmpl_list: complete list. |
| 430 | * |
| 431 | * returns 0, OK; otherwise, error. |
| 432 | */ |
| 433 | static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots, |
| 434 | struct mei_cl_cb *cb_pos, |
| 435 | struct mei_cl *cl, |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 436 | struct mei_cl_cb *cmpl_list) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 437 | { |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 438 | if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) + |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 439 | sizeof(struct hbm_client_connect_request))) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 440 | /* return the cancel routine */ |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 441 | list_del(&cb_pos->list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 442 | return -EBADMSG; |
| 443 | } |
| 444 | |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 445 | cl->state = MEI_FILE_CONNECTING; |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame^] | 446 | *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request)); |
| 447 | if (mei_hbm_cl_connect_req(dev, cl)) { |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 448 | cl->status = -ENODEV; |
Tomas Winkler | ebb108ef | 2012-10-09 16:50:16 +0200 | [diff] [blame] | 449 | cb_pos->buf_idx = 0; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 450 | list_del(&cb_pos->list); |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 451 | return -ENODEV; |
| 452 | } else { |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 453 | list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list); |
Tomas Winkler | b45f3cc | 2012-07-04 19:24:53 +0300 | [diff] [blame] | 454 | cl->timer_count = MEI_CONNECT_TIMEOUT; |
| 455 | } |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | /** |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 460 | * mei_irq_thread_write_complete - write messages to device. |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 461 | * |
| 462 | * @dev: the device structure. |
| 463 | * @slots: free slots. |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 464 | * @cb: callback block. |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 465 | * @cmpl_list: complete list. |
| 466 | * |
| 467 | * returns 0, OK; otherwise, error. |
| 468 | */ |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 469 | static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots, |
| 470 | struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 471 | { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 472 | struct mei_msg_hdr mei_hdr; |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 473 | struct mei_cl *cl = cb->cl; |
| 474 | size_t len = cb->request_buffer.size - cb->buf_idx; |
| 475 | size_t msg_slots = mei_data2slots(len); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 476 | |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 477 | mei_hdr.host_addr = cl->host_client_id; |
| 478 | mei_hdr.me_addr = cl->me_client_id; |
| 479 | mei_hdr.reserved = 0; |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 480 | |
| 481 | if (*slots >= msg_slots) { |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 482 | mei_hdr.length = len; |
| 483 | mei_hdr.msg_complete = 1; |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 484 | /* Split the message only if we can write the whole host buffer */ |
Tomas Winkler | 24aadc8 | 2012-06-25 23:46:27 +0300 | [diff] [blame] | 485 | } else if (*slots == dev->hbuf_depth) { |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 486 | msg_slots = *slots; |
| 487 | len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 488 | mei_hdr.length = len; |
| 489 | mei_hdr.msg_complete = 0; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 490 | } else { |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 491 | /* wait for next time the host buffer is empty */ |
| 492 | return 0; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 493 | } |
| 494 | |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 495 | dev_dbg(&dev->pdev->dev, "buf: size = %d idx = %lu\n", |
| 496 | cb->request_buffer.size, cb->buf_idx); |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 497 | dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr)); |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 498 | |
| 499 | *slots -= msg_slots; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 500 | if (mei_write_message(dev, &mei_hdr, |
Tomas Winkler | 438763f | 2012-12-25 19:05:59 +0200 | [diff] [blame] | 501 | cb->request_buffer.data + cb->buf_idx)) { |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 502 | cl->status = -ENODEV; |
| 503 | list_move_tail(&cb->list, &cmpl_list->list); |
| 504 | return -ENODEV; |
| 505 | } |
| 506 | |
| 507 | if (mei_flow_ctrl_reduce(dev, cl)) |
| 508 | return -ENODEV; |
| 509 | |
| 510 | cl->status = 0; |
Tomas Winkler | e46f187 | 2012-12-25 19:06:10 +0200 | [diff] [blame] | 511 | cb->buf_idx += mei_hdr.length; |
| 512 | if (mei_hdr.msg_complete) |
Tomas Winkler | ea3b5fb | 2012-11-18 15:13:16 +0200 | [diff] [blame] | 513 | list_move_tail(&cb->list, &dev->write_waiting_list.list); |
| 514 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | /** |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 519 | * mei_irq_thread_read_handler - bottom half read routine after ISR to |
| 520 | * handle the read processing. |
| 521 | * |
| 522 | * @cmpl_list: An instance of our list structure |
| 523 | * @dev: the device structure |
| 524 | * @slots: slots to read. |
| 525 | * |
| 526 | * returns 0 on success, <0 on failure. |
| 527 | */ |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 528 | static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list, |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 529 | struct mei_device *dev, |
| 530 | s32 *slots) |
| 531 | { |
| 532 | struct mei_msg_hdr *mei_hdr; |
| 533 | struct mei_cl *cl_pos = NULL; |
| 534 | struct mei_cl *cl_next = NULL; |
| 535 | int ret = 0; |
| 536 | |
| 537 | if (!dev->rd_msg_hdr) { |
| 538 | dev->rd_msg_hdr = mei_mecbrw_read(dev); |
| 539 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); |
| 540 | (*slots)--; |
| 541 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); |
| 542 | } |
| 543 | mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr; |
Tomas Winkler | 15d4acc | 2012-12-25 19:06:00 +0200 | [diff] [blame] | 544 | dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 545 | |
| 546 | if (mei_hdr->reserved || !dev->rd_msg_hdr) { |
| 547 | dev_dbg(&dev->pdev->dev, "corrupted message header.\n"); |
| 548 | ret = -EBADMSG; |
| 549 | goto end; |
| 550 | } |
| 551 | |
| 552 | if (mei_hdr->host_addr || mei_hdr->me_addr) { |
| 553 | list_for_each_entry_safe(cl_pos, cl_next, |
| 554 | &dev->file_list, link) { |
| 555 | dev_dbg(&dev->pdev->dev, |
| 556 | "list_for_each_entry_safe read host" |
| 557 | " client = %d, ME client = %d\n", |
| 558 | cl_pos->host_client_id, |
| 559 | cl_pos->me_client_id); |
| 560 | if (cl_pos->host_client_id == mei_hdr->host_addr && |
| 561 | cl_pos->me_client_id == mei_hdr->me_addr) |
| 562 | break; |
| 563 | } |
| 564 | |
| 565 | if (&cl_pos->link == &dev->file_list) { |
| 566 | dev_dbg(&dev->pdev->dev, "corrupted message header\n"); |
| 567 | ret = -EBADMSG; |
| 568 | goto end; |
| 569 | } |
| 570 | } |
| 571 | if (((*slots) * sizeof(u32)) < mei_hdr->length) { |
| 572 | dev_dbg(&dev->pdev->dev, |
| 573 | "we can't read the message slots =%08x.\n", |
| 574 | *slots); |
| 575 | /* we can't read the message */ |
| 576 | ret = -ERANGE; |
| 577 | goto end; |
| 578 | } |
| 579 | |
| 580 | /* decide where to read the message too */ |
| 581 | if (!mei_hdr->host_addr) { |
| 582 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n"); |
Tomas Winkler | bb1b013 | 2012-12-25 19:06:07 +0200 | [diff] [blame] | 583 | mei_hbm_dispatch(dev, mei_hdr); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 584 | dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n"); |
| 585 | } else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id && |
| 586 | (MEI_FILE_CONNECTED == dev->iamthif_cl.state) && |
| 587 | (dev->iamthif_state == MEI_IAMTHIF_READING)) { |
| 588 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n"); |
Tomas Winkler | 15d4acc | 2012-12-25 19:06:00 +0200 | [diff] [blame] | 589 | |
| 590 | dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); |
Tomas Winkler | 19838fb | 2012-11-01 21:17:15 +0200 | [diff] [blame] | 591 | |
| 592 | ret = mei_amthif_irq_read_message(cmpl_list, dev, mei_hdr); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 593 | if (ret) |
| 594 | goto end; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 595 | } else { |
| 596 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n"); |
| 597 | ret = mei_irq_thread_read_client_message(cmpl_list, |
| 598 | dev, mei_hdr); |
| 599 | if (ret) |
| 600 | goto end; |
| 601 | |
| 602 | } |
| 603 | |
| 604 | /* reset the number of slots and header */ |
| 605 | *slots = mei_count_full_read_slots(dev); |
| 606 | dev->rd_msg_hdr = 0; |
| 607 | |
| 608 | if (*slots == -EOVERFLOW) { |
| 609 | /* overflow - reset */ |
| 610 | dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n"); |
| 611 | /* set the event since message has been read */ |
| 612 | ret = -ERANGE; |
| 613 | goto end; |
| 614 | } |
| 615 | end: |
| 616 | return ret; |
| 617 | } |
| 618 | |
| 619 | |
| 620 | /** |
| 621 | * mei_irq_thread_write_handler - bottom half write routine after |
| 622 | * ISR to handle the write processing. |
| 623 | * |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 624 | * @dev: the device structure |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 625 | * @cmpl_list: An instance of our list structure |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 626 | * |
| 627 | * returns 0 on success, <0 on failure. |
| 628 | */ |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 629 | static int mei_irq_thread_write_handler(struct mei_device *dev, |
| 630 | struct mei_cl_cb *cmpl_list) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 631 | { |
| 632 | |
| 633 | struct mei_cl *cl; |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 634 | struct mei_cl_cb *pos = NULL, *next = NULL; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 635 | struct mei_cl_cb *list; |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 636 | s32 slots; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 637 | int ret; |
| 638 | |
Tomas Winkler | 726917f | 2012-06-25 23:46:28 +0300 | [diff] [blame] | 639 | if (!mei_hbuf_is_empty(dev)) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 640 | dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n"); |
| 641 | return 0; |
| 642 | } |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 643 | slots = mei_hbuf_empty_slots(dev); |
| 644 | if (slots <= 0) |
Tomas Winkler | 7d5e0e5 | 2012-06-19 09:13:36 +0300 | [diff] [blame] | 645 | return -EMSGSIZE; |
| 646 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 647 | /* complete all waiting for write CB */ |
| 648 | dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n"); |
| 649 | |
| 650 | list = &dev->write_waiting_list; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 651 | list_for_each_entry_safe(pos, next, &list->list, list) { |
Tomas Winkler | db3ed43 | 2012-11-11 17:37:59 +0200 | [diff] [blame] | 652 | cl = pos->cl; |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 653 | if (cl == NULL) |
| 654 | continue; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 655 | |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 656 | cl->status = 0; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 657 | list_del(&pos->list); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 658 | if (MEI_WRITING == cl->writing_state && |
Tomas Winkler | 4b8960b | 2012-11-11 17:38:00 +0200 | [diff] [blame] | 659 | pos->fop_type == MEI_FOP_WRITE && |
| 660 | cl != &dev->iamthif_cl) { |
Tomas Winkler | 483136e | 2012-07-04 19:24:54 +0300 | [diff] [blame] | 661 | dev_dbg(&dev->pdev->dev, "MEI WRITE COMPLETE\n"); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 662 | cl->writing_state = MEI_WRITE_COMPLETE; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 663 | list_add_tail(&pos->list, &cmpl_list->list); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 664 | } |
| 665 | if (cl == &dev->iamthif_cl) { |
| 666 | dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n"); |
| 667 | if (dev->iamthif_flow_control_pending) { |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 668 | ret = mei_amthif_irq_read(dev, &slots); |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 669 | if (ret) |
| 670 | return ret; |
| 671 | } |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 672 | } |
| 673 | } |
| 674 | |
Tomas Winkler | c216fde | 2012-08-16 19:39:43 +0300 | [diff] [blame] | 675 | if (dev->wd_state == MEI_WD_STOPPING) { |
| 676 | dev->wd_state = MEI_WD_IDLE; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 677 | wake_up_interruptible(&dev->wait_stop_wd); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 678 | } |
| 679 | |
Tomas Winkler | 5fb54fb | 2012-11-18 15:13:15 +0200 | [diff] [blame] | 680 | if (dev->wr_ext_msg.hdr.length) { |
| 681 | mei_write_message(dev, &dev->wr_ext_msg.hdr, |
Tomas Winkler | 438763f | 2012-12-25 19:05:59 +0200 | [diff] [blame] | 682 | dev->wr_ext_msg.data); |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 683 | slots -= mei_data2slots(dev->wr_ext_msg.hdr.length); |
Tomas Winkler | 5fb54fb | 2012-11-18 15:13:15 +0200 | [diff] [blame] | 684 | dev->wr_ext_msg.hdr.length = 0; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 685 | } |
Tomas Winkler | b210d75 | 2012-08-07 00:03:56 +0300 | [diff] [blame] | 686 | if (dev->dev_state == MEI_DEV_ENABLED) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 687 | if (dev->wd_pending && |
Tomas Winkler | 483136e | 2012-07-04 19:24:54 +0300 | [diff] [blame] | 688 | mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 689 | if (mei_wd_send(dev)) |
| 690 | dev_dbg(&dev->pdev->dev, "wd send failed.\n"); |
Tomas Winkler | 483136e | 2012-07-04 19:24:54 +0300 | [diff] [blame] | 691 | else if (mei_flow_ctrl_reduce(dev, &dev->wd_cl)) |
| 692 | return -ENODEV; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 693 | |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 694 | dev->wd_pending = false; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 695 | |
Tomas Winkler | c216fde | 2012-08-16 19:39:43 +0300 | [diff] [blame] | 696 | if (dev->wd_state == MEI_WD_RUNNING) |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 697 | slots -= mei_data2slots(MEI_WD_START_MSG_SIZE); |
Tomas Winkler | d242a0a | 2012-07-04 19:24:50 +0300 | [diff] [blame] | 698 | else |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 699 | slots -= mei_data2slots(MEI_WD_STOP_MSG_SIZE); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 700 | } |
| 701 | } |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 702 | |
| 703 | /* complete control write list CB */ |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 704 | dev_dbg(&dev->pdev->dev, "complete control write list cb.\n"); |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 705 | list_for_each_entry_safe(pos, next, &dev->ctrl_wr_list.list, list) { |
Tomas Winkler | db3ed43 | 2012-11-11 17:37:59 +0200 | [diff] [blame] | 706 | cl = pos->cl; |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 707 | if (!cl) { |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 708 | list_del(&pos->list); |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 709 | return -ENODEV; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 710 | } |
Tomas Winkler | 4b8960b | 2012-11-11 17:38:00 +0200 | [diff] [blame] | 711 | switch (pos->fop_type) { |
| 712 | case MEI_FOP_CLOSE: |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 713 | /* send disconnect message */ |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 714 | ret = _mei_irq_thread_close(dev, &slots, pos, |
| 715 | cl, cmpl_list); |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 716 | if (ret) |
| 717 | return ret; |
| 718 | |
| 719 | break; |
Tomas Winkler | 4b8960b | 2012-11-11 17:38:00 +0200 | [diff] [blame] | 720 | case MEI_FOP_READ: |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 721 | /* send flow control message */ |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 722 | ret = _mei_irq_thread_read(dev, &slots, pos, |
| 723 | cl, cmpl_list); |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 724 | if (ret) |
| 725 | return ret; |
| 726 | |
| 727 | break; |
Tomas Winkler | 4b8960b | 2012-11-11 17:38:00 +0200 | [diff] [blame] | 728 | case MEI_FOP_IOCTL: |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 729 | /* connect message */ |
Natalia Ovsyanikov | e8cd29d | 2011-12-05 00:16:54 +0200 | [diff] [blame] | 730 | if (mei_other_client_is_connecting(dev, cl)) |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 731 | continue; |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 732 | ret = _mei_irq_thread_ioctl(dev, &slots, pos, |
| 733 | cl, cmpl_list); |
Tomas Winkler | c837209 | 2011-11-27 21:43:33 +0200 | [diff] [blame] | 734 | if (ret) |
| 735 | return ret; |
| 736 | |
| 737 | break; |
| 738 | |
| 739 | default: |
| 740 | BUG(); |
| 741 | } |
| 742 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 743 | } |
| 744 | /* complete write list CB */ |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 745 | dev_dbg(&dev->pdev->dev, "complete write list cb.\n"); |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 746 | list_for_each_entry_safe(pos, next, &dev->write_list.list, list) { |
Tomas Winkler | db3ed43 | 2012-11-11 17:37:59 +0200 | [diff] [blame] | 747 | cl = pos->cl; |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 748 | if (cl == NULL) |
| 749 | continue; |
Tomas Winkler | be9d87a | 2012-11-18 15:13:19 +0200 | [diff] [blame] | 750 | if (mei_flow_ctrl_creds(dev, cl) <= 0) { |
| 751 | dev_dbg(&dev->pdev->dev, |
| 752 | "No flow control credentials for client %d, not sending.\n", |
| 753 | cl->host_client_id); |
| 754 | continue; |
| 755 | } |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 756 | |
Tomas Winkler | be9d87a | 2012-11-18 15:13:19 +0200 | [diff] [blame] | 757 | if (cl == &dev->iamthif_cl) |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 758 | ret = mei_amthif_irq_write_complete(dev, &slots, |
Tomas Winkler | 24c656e | 2012-11-18 15:13:17 +0200 | [diff] [blame] | 759 | pos, cmpl_list); |
Tomas Winkler | be9d87a | 2012-11-18 15:13:19 +0200 | [diff] [blame] | 760 | else |
| 761 | ret = mei_irq_thread_write_complete(dev, &slots, pos, |
| 762 | cmpl_list); |
| 763 | if (ret) |
| 764 | return ret; |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 765 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 766 | } |
| 767 | return 0; |
| 768 | } |
| 769 | |
| 770 | |
| 771 | |
| 772 | /** |
| 773 | * mei_timer - timer function. |
| 774 | * |
| 775 | * @work: pointer to the work_struct structure |
| 776 | * |
| 777 | * NOTE: This function is called by timer interrupt work |
| 778 | */ |
Oren Weil | a61c653 | 2011-09-07 09:03:13 +0300 | [diff] [blame] | 779 | void mei_timer(struct work_struct *work) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 780 | { |
| 781 | unsigned long timeout; |
| 782 | struct mei_cl *cl_pos = NULL; |
| 783 | struct mei_cl *cl_next = NULL; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 784 | struct mei_cl_cb *cb_pos = NULL; |
| 785 | struct mei_cl_cb *cb_next = NULL; |
| 786 | |
| 787 | struct mei_device *dev = container_of(work, |
Oren Weil | a61c653 | 2011-09-07 09:03:13 +0300 | [diff] [blame] | 788 | struct mei_device, timer_work.work); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 789 | |
| 790 | |
| 791 | mutex_lock(&dev->device_lock); |
Tomas Winkler | b210d75 | 2012-08-07 00:03:56 +0300 | [diff] [blame] | 792 | if (dev->dev_state != MEI_DEV_ENABLED) { |
| 793 | if (dev->dev_state == MEI_DEV_INIT_CLIENTS) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 794 | if (dev->init_clients_timer) { |
| 795 | if (--dev->init_clients_timer == 0) { |
| 796 | dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n", |
| 797 | dev->init_clients_state); |
| 798 | mei_reset(dev, 1); |
| 799 | } |
| 800 | } |
| 801 | } |
| 802 | goto out; |
| 803 | } |
| 804 | /*** connect/disconnect timeouts ***/ |
| 805 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { |
| 806 | if (cl_pos->timer_count) { |
| 807 | if (--cl_pos->timer_count == 0) { |
| 808 | dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n"); |
| 809 | mei_reset(dev, 1); |
| 810 | goto out; |
| 811 | } |
| 812 | } |
| 813 | } |
| 814 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 815 | if (dev->iamthif_stall_timer) { |
| 816 | if (--dev->iamthif_stall_timer == 0) { |
Masanari Iida | 32de21f | 2012-01-25 23:14:56 +0900 | [diff] [blame] | 817 | dev_dbg(&dev->pdev->dev, "resetting because of hang to amthi.\n"); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 818 | mei_reset(dev, 1); |
| 819 | dev->iamthif_msg_buf_size = 0; |
| 820 | dev->iamthif_msg_buf_index = 0; |
Tomas Winkler | eb9af0a | 2011-05-25 17:28:22 +0300 | [diff] [blame] | 821 | dev->iamthif_canceled = false; |
| 822 | dev->iamthif_ioctl = true; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 823 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
| 824 | dev->iamthif_timer = 0; |
| 825 | |
Tomas Winkler | 601a1ef | 2012-10-09 16:50:20 +0200 | [diff] [blame] | 826 | mei_io_cb_free(dev->iamthif_current_cb); |
| 827 | dev->iamthif_current_cb = NULL; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 828 | |
| 829 | dev->iamthif_file_object = NULL; |
Tomas Winkler | 19838fb | 2012-11-01 21:17:15 +0200 | [diff] [blame] | 830 | mei_amthif_run_next_cmd(dev); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 831 | } |
| 832 | } |
| 833 | |
| 834 | if (dev->iamthif_timer) { |
| 835 | |
| 836 | timeout = dev->iamthif_timer + |
Tomas Winkler | 3870c32 | 2012-11-01 21:17:14 +0200 | [diff] [blame] | 837 | mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 838 | |
| 839 | dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n", |
| 840 | dev->iamthif_timer); |
| 841 | dev_dbg(&dev->pdev->dev, "timeout = %ld\n", timeout); |
| 842 | dev_dbg(&dev->pdev->dev, "jiffies = %ld\n", jiffies); |
| 843 | if (time_after(jiffies, timeout)) { |
| 844 | /* |
| 845 | * User didn't read the AMTHI data on time (15sec) |
| 846 | * freeing AMTHI for other requests |
| 847 | */ |
| 848 | |
| 849 | dev_dbg(&dev->pdev->dev, "freeing AMTHI for other requests\n"); |
| 850 | |
Tomas Winkler | e773efc | 2012-11-11 17:37:58 +0200 | [diff] [blame] | 851 | list_for_each_entry_safe(cb_pos, cb_next, |
| 852 | &dev->amthif_rd_complete_list.list, list) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 853 | |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 854 | cl_pos = cb_pos->file_object->private_data; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 855 | |
Tomas Winkler | b7cd2d9 | 2011-11-27 21:43:34 +0200 | [diff] [blame] | 856 | /* Finding the AMTHI entry. */ |
| 857 | if (cl_pos == &dev->iamthif_cl) |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 858 | list_del(&cb_pos->list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 859 | } |
Tomas Winkler | 601a1ef | 2012-10-09 16:50:20 +0200 | [diff] [blame] | 860 | mei_io_cb_free(dev->iamthif_current_cb); |
| 861 | dev->iamthif_current_cb = NULL; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 862 | |
| 863 | dev->iamthif_file_object->private_data = NULL; |
| 864 | dev->iamthif_file_object = NULL; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 865 | dev->iamthif_timer = 0; |
Tomas Winkler | 19838fb | 2012-11-01 21:17:15 +0200 | [diff] [blame] | 866 | mei_amthif_run_next_cmd(dev); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 867 | |
| 868 | } |
| 869 | } |
| 870 | out: |
Tomas Winkler | 441ab50 | 2011-12-13 23:39:34 +0200 | [diff] [blame] | 871 | schedule_delayed_work(&dev->timer_work, 2 * HZ); |
| 872 | mutex_unlock(&dev->device_lock); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | /** |
| 876 | * mei_interrupt_thread_handler - function called after ISR to handle the interrupt |
| 877 | * processing. |
| 878 | * |
| 879 | * @irq: The irq number |
| 880 | * @dev_id: pointer to the device structure |
| 881 | * |
| 882 | * returns irqreturn_t |
| 883 | * |
| 884 | */ |
| 885 | irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id) |
| 886 | { |
| 887 | struct mei_device *dev = (struct mei_device *) dev_id; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 888 | struct mei_cl_cb complete_list; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 889 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; |
| 890 | struct mei_cl *cl; |
| 891 | s32 slots; |
| 892 | int rets; |
| 893 | bool bus_message_received; |
| 894 | |
| 895 | |
| 896 | dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n"); |
| 897 | /* initialize our complete list */ |
| 898 | mutex_lock(&dev->device_lock); |
Tomas Winkler | 0288c7c | 2011-06-06 10:44:34 +0300 | [diff] [blame] | 899 | mei_io_list_init(&complete_list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 900 | dev->host_hw_state = mei_hcsr_read(dev); |
Tomas Winkler | 4f61a7a | 2011-07-14 20:11:25 +0300 | [diff] [blame] | 901 | |
| 902 | /* Ack the interrupt here |
Justin P. Mattock | 5f9092f3 | 2012-03-12 07:18:09 -0700 | [diff] [blame] | 903 | * In case of MSI we don't go through the quick handler */ |
Tomas Winkler | 4f61a7a | 2011-07-14 20:11:25 +0300 | [diff] [blame] | 904 | if (pci_dev_msi_enabled(dev->pdev)) |
Tomas Winkler | 3a65dd4 | 2012-12-25 19:06:06 +0200 | [diff] [blame] | 905 | mei_clear_interrupts(dev); |
Tomas Winkler | 4f61a7a | 2011-07-14 20:11:25 +0300 | [diff] [blame] | 906 | |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 907 | dev->me_hw_state = mei_mecsr_read(dev); |
| 908 | |
| 909 | /* check if ME wants a reset */ |
| 910 | if ((dev->me_hw_state & ME_RDY_HRA) == 0 && |
Tomas Winkler | b210d75 | 2012-08-07 00:03:56 +0300 | [diff] [blame] | 911 | dev->dev_state != MEI_DEV_RESETING && |
| 912 | dev->dev_state != MEI_DEV_INITIALIZING) { |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 913 | dev_dbg(&dev->pdev->dev, "FW not ready.\n"); |
| 914 | mei_reset(dev, 1); |
| 915 | mutex_unlock(&dev->device_lock); |
| 916 | return IRQ_HANDLED; |
| 917 | } |
| 918 | |
| 919 | /* check if we need to start the dev */ |
| 920 | if ((dev->host_hw_state & H_RDY) == 0) { |
| 921 | if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) { |
| 922 | dev_dbg(&dev->pdev->dev, "we need to start the dev.\n"); |
| 923 | dev->host_hw_state |= (H_IE | H_IG | H_RDY); |
| 924 | mei_hcsr_set(dev); |
Tomas Winkler | b210d75 | 2012-08-07 00:03:56 +0300 | [diff] [blame] | 925 | dev->dev_state = MEI_DEV_INIT_CLIENTS; |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 926 | dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); |
| 927 | /* link is established |
| 928 | * start sending messages. |
| 929 | */ |
Tomas Winkler | 8120e72 | 2012-12-25 19:06:11 +0200 | [diff] [blame^] | 930 | mei_hbm_start_req(dev); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 931 | mutex_unlock(&dev->device_lock); |
| 932 | return IRQ_HANDLED; |
| 933 | } else { |
| 934 | dev_dbg(&dev->pdev->dev, "FW not ready.\n"); |
| 935 | mutex_unlock(&dev->device_lock); |
| 936 | return IRQ_HANDLED; |
| 937 | } |
| 938 | } |
Justin P. Mattock | 5f9092f3 | 2012-03-12 07:18:09 -0700 | [diff] [blame] | 939 | /* check slots available for reading */ |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 940 | slots = mei_count_full_read_slots(dev); |
Tomas Winkler | 5fb54fb | 2012-11-18 15:13:15 +0200 | [diff] [blame] | 941 | while (slots > 0) { |
| 942 | /* we have urgent data to send so break the read */ |
| 943 | if (dev->wr_ext_msg.hdr.length) |
| 944 | break; |
| 945 | dev_dbg(&dev->pdev->dev, "slots =%08x\n", slots); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 946 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_handler.\n"); |
| 947 | rets = mei_irq_thread_read_handler(&complete_list, dev, &slots); |
| 948 | if (rets) |
| 949 | goto end; |
| 950 | } |
Tomas Winkler | 9a84d61 | 2012-11-18 15:13:18 +0200 | [diff] [blame] | 951 | rets = mei_irq_thread_write_handler(dev, &complete_list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 952 | end: |
| 953 | dev_dbg(&dev->pdev->dev, "end of bottom half function.\n"); |
| 954 | dev->host_hw_state = mei_hcsr_read(dev); |
Tomas Winkler | 726917f | 2012-06-25 23:46:28 +0300 | [diff] [blame] | 955 | dev->mei_host_buffer_is_empty = mei_hbuf_is_empty(dev); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 956 | |
| 957 | bus_message_received = false; |
| 958 | if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) { |
| 959 | dev_dbg(&dev->pdev->dev, "received waiting bus message\n"); |
| 960 | bus_message_received = true; |
| 961 | } |
| 962 | mutex_unlock(&dev->device_lock); |
| 963 | if (bus_message_received) { |
| 964 | dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n"); |
| 965 | wake_up_interruptible(&dev->wait_recvd_msg); |
| 966 | bus_message_received = false; |
| 967 | } |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 968 | if (list_empty(&complete_list.list)) |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 969 | return IRQ_HANDLED; |
| 970 | |
| 971 | |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 972 | list_for_each_entry_safe(cb_pos, cb_next, &complete_list.list, list) { |
Tomas Winkler | db3ed43 | 2012-11-11 17:37:59 +0200 | [diff] [blame] | 973 | cl = cb_pos->cl; |
Tomas Winkler | fb601ad | 2012-10-15 12:06:48 +0200 | [diff] [blame] | 974 | list_del(&cb_pos->list); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 975 | if (cl) { |
| 976 | if (cl != &dev->iamthif_cl) { |
| 977 | dev_dbg(&dev->pdev->dev, "completing call back.\n"); |
| 978 | _mei_cmpl(cl, cb_pos); |
| 979 | cb_pos = NULL; |
| 980 | } else if (cl == &dev->iamthif_cl) { |
Tomas Winkler | 19838fb | 2012-11-01 21:17:15 +0200 | [diff] [blame] | 981 | mei_amthif_complete(dev, cb_pos); |
Oren Weil | fb7d879 | 2011-05-15 13:43:42 +0300 | [diff] [blame] | 982 | } |
| 983 | } |
| 984 | } |
| 985 | return IRQ_HANDLED; |
| 986 | } |