Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #include <asm-generic/kmap_types.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/errno.h> |
| 37 | #include <linux/pci.h> |
| 38 | #include <linux/dma-mapping.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/delay.h> |
| 41 | #include <linux/random.h> |
| 42 | #include <linux/io-mapping.h> |
| 43 | #include <linux/mlx5/driver.h> |
| 44 | #include <linux/debugfs.h> |
| 45 | |
| 46 | #include "mlx5_core.h" |
| 47 | |
| 48 | enum { |
Moshe Lazer | 0a324f31 | 2013-08-14 17:46:48 +0300 | [diff] [blame] | 49 | CMD_IF_REV = 5, |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 50 | }; |
| 51 | |
| 52 | enum { |
| 53 | CMD_MODE_POLLING, |
| 54 | CMD_MODE_EVENTS |
| 55 | }; |
| 56 | |
| 57 | enum { |
| 58 | NUM_LONG_LISTS = 2, |
| 59 | NUM_MED_LISTS = 64, |
| 60 | LONG_LIST_SIZE = (2ULL * 1024 * 1024 * 1024 / PAGE_SIZE) * 8 + 16 + |
| 61 | MLX5_CMD_DATA_BLOCK_SIZE, |
| 62 | MED_LIST_SIZE = 16 + MLX5_CMD_DATA_BLOCK_SIZE, |
| 63 | }; |
| 64 | |
| 65 | enum { |
| 66 | MLX5_CMD_DELIVERY_STAT_OK = 0x0, |
| 67 | MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR = 0x1, |
| 68 | MLX5_CMD_DELIVERY_STAT_TOK_ERR = 0x2, |
| 69 | MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR = 0x3, |
| 70 | MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR = 0x4, |
| 71 | MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR = 0x5, |
| 72 | MLX5_CMD_DELIVERY_STAT_FW_ERR = 0x6, |
| 73 | MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR = 0x7, |
| 74 | MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR = 0x8, |
| 75 | MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR = 0x9, |
| 76 | MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR = 0x10, |
| 77 | }; |
| 78 | |
| 79 | enum { |
| 80 | MLX5_CMD_STAT_OK = 0x0, |
| 81 | MLX5_CMD_STAT_INT_ERR = 0x1, |
| 82 | MLX5_CMD_STAT_BAD_OP_ERR = 0x2, |
| 83 | MLX5_CMD_STAT_BAD_PARAM_ERR = 0x3, |
| 84 | MLX5_CMD_STAT_BAD_SYS_STATE_ERR = 0x4, |
| 85 | MLX5_CMD_STAT_BAD_RES_ERR = 0x5, |
| 86 | MLX5_CMD_STAT_RES_BUSY = 0x6, |
| 87 | MLX5_CMD_STAT_LIM_ERR = 0x8, |
| 88 | MLX5_CMD_STAT_BAD_RES_STATE_ERR = 0x9, |
| 89 | MLX5_CMD_STAT_IX_ERR = 0xa, |
| 90 | MLX5_CMD_STAT_NO_RES_ERR = 0xf, |
| 91 | MLX5_CMD_STAT_BAD_INP_LEN_ERR = 0x50, |
| 92 | MLX5_CMD_STAT_BAD_OUTP_LEN_ERR = 0x51, |
| 93 | MLX5_CMD_STAT_BAD_QP_STATE_ERR = 0x10, |
| 94 | MLX5_CMD_STAT_BAD_PKT_ERR = 0x30, |
| 95 | MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR = 0x40, |
| 96 | }; |
| 97 | |
| 98 | static struct mlx5_cmd_work_ent *alloc_cmd(struct mlx5_cmd *cmd, |
| 99 | struct mlx5_cmd_msg *in, |
| 100 | struct mlx5_cmd_msg *out, |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 101 | void *uout, int uout_size, |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 102 | mlx5_cmd_cbk_t cbk, |
| 103 | void *context, int page_queue) |
| 104 | { |
| 105 | gfp_t alloc_flags = cbk ? GFP_ATOMIC : GFP_KERNEL; |
| 106 | struct mlx5_cmd_work_ent *ent; |
| 107 | |
| 108 | ent = kzalloc(sizeof(*ent), alloc_flags); |
| 109 | if (!ent) |
| 110 | return ERR_PTR(-ENOMEM); |
| 111 | |
| 112 | ent->in = in; |
| 113 | ent->out = out; |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 114 | ent->uout = uout; |
| 115 | ent->uout_size = uout_size; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 116 | ent->callback = cbk; |
| 117 | ent->context = context; |
| 118 | ent->cmd = cmd; |
| 119 | ent->page_queue = page_queue; |
| 120 | |
| 121 | return ent; |
| 122 | } |
| 123 | |
| 124 | static u8 alloc_token(struct mlx5_cmd *cmd) |
| 125 | { |
| 126 | u8 token; |
| 127 | |
| 128 | spin_lock(&cmd->token_lock); |
| 129 | token = cmd->token++ % 255 + 1; |
| 130 | spin_unlock(&cmd->token_lock); |
| 131 | |
| 132 | return token; |
| 133 | } |
| 134 | |
| 135 | static int alloc_ent(struct mlx5_cmd *cmd) |
| 136 | { |
| 137 | unsigned long flags; |
| 138 | int ret; |
| 139 | |
| 140 | spin_lock_irqsave(&cmd->alloc_lock, flags); |
| 141 | ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds); |
| 142 | if (ret < cmd->max_reg_cmds) |
| 143 | clear_bit(ret, &cmd->bitmask); |
| 144 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); |
| 145 | |
| 146 | return ret < cmd->max_reg_cmds ? ret : -ENOMEM; |
| 147 | } |
| 148 | |
| 149 | static void free_ent(struct mlx5_cmd *cmd, int idx) |
| 150 | { |
| 151 | unsigned long flags; |
| 152 | |
| 153 | spin_lock_irqsave(&cmd->alloc_lock, flags); |
| 154 | set_bit(idx, &cmd->bitmask); |
| 155 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); |
| 156 | } |
| 157 | |
| 158 | static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx) |
| 159 | { |
| 160 | return cmd->cmd_buf + (idx << cmd->log_stride); |
| 161 | } |
| 162 | |
| 163 | static u8 xor8_buf(void *buf, int len) |
| 164 | { |
| 165 | u8 *ptr = buf; |
| 166 | u8 sum = 0; |
| 167 | int i; |
| 168 | |
| 169 | for (i = 0; i < len; i++) |
| 170 | sum ^= ptr[i]; |
| 171 | |
| 172 | return sum; |
| 173 | } |
| 174 | |
| 175 | static int verify_block_sig(struct mlx5_cmd_prot_block *block) |
| 176 | { |
| 177 | if (xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 1) != 0xff) |
| 178 | return -EINVAL; |
| 179 | |
| 180 | if (xor8_buf(block, sizeof(*block)) != 0xff) |
| 181 | return -EINVAL; |
| 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 186 | static void calc_block_sig(struct mlx5_cmd_prot_block *block, u8 token, |
| 187 | int csum) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 188 | { |
| 189 | block->token = token; |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 190 | if (csum) { |
| 191 | block->ctrl_sig = ~xor8_buf(block->rsvd0, sizeof(*block) - |
| 192 | sizeof(block->data) - 2); |
| 193 | block->sig = ~xor8_buf(block, sizeof(*block) - 1); |
| 194 | } |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 195 | } |
| 196 | |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 197 | static void calc_chain_sig(struct mlx5_cmd_msg *msg, u8 token, int csum) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 198 | { |
| 199 | struct mlx5_cmd_mailbox *next = msg->next; |
| 200 | |
| 201 | while (next) { |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 202 | calc_block_sig(next->buf, token, csum); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 203 | next = next->next; |
| 204 | } |
| 205 | } |
| 206 | |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 207 | static void set_signature(struct mlx5_cmd_work_ent *ent, int csum) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 208 | { |
| 209 | ent->lay->sig = ~xor8_buf(ent->lay, sizeof(*ent->lay)); |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 210 | calc_chain_sig(ent->in, ent->token, csum); |
| 211 | calc_chain_sig(ent->out, ent->token, csum); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | static void poll_timeout(struct mlx5_cmd_work_ent *ent) |
| 215 | { |
| 216 | unsigned long poll_end = jiffies + msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000); |
| 217 | u8 own; |
| 218 | |
| 219 | do { |
| 220 | own = ent->lay->status_own; |
| 221 | if (!(own & CMD_OWNER_HW)) { |
| 222 | ent->ret = 0; |
| 223 | return; |
| 224 | } |
| 225 | usleep_range(5000, 10000); |
| 226 | } while (time_before(jiffies, poll_end)); |
| 227 | |
| 228 | ent->ret = -ETIMEDOUT; |
| 229 | } |
| 230 | |
| 231 | static void free_cmd(struct mlx5_cmd_work_ent *ent) |
| 232 | { |
| 233 | kfree(ent); |
| 234 | } |
| 235 | |
| 236 | |
| 237 | static int verify_signature(struct mlx5_cmd_work_ent *ent) |
| 238 | { |
| 239 | struct mlx5_cmd_mailbox *next = ent->out->next; |
| 240 | int err; |
| 241 | u8 sig; |
| 242 | |
| 243 | sig = xor8_buf(ent->lay, sizeof(*ent->lay)); |
| 244 | if (sig != 0xff) |
| 245 | return -EINVAL; |
| 246 | |
| 247 | while (next) { |
| 248 | err = verify_block_sig(next->buf); |
| 249 | if (err) |
| 250 | return err; |
| 251 | |
| 252 | next = next->next; |
| 253 | } |
| 254 | |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static void dump_buf(void *buf, int size, int data_only, int offset) |
| 259 | { |
| 260 | __be32 *p = buf; |
| 261 | int i; |
| 262 | |
| 263 | for (i = 0; i < size; i += 16) { |
| 264 | pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]), |
| 265 | be32_to_cpu(p[1]), be32_to_cpu(p[2]), |
| 266 | be32_to_cpu(p[3])); |
| 267 | p += 4; |
| 268 | offset += 16; |
| 269 | } |
| 270 | if (!data_only) |
| 271 | pr_debug("\n"); |
| 272 | } |
| 273 | |
| 274 | const char *mlx5_command_str(int command) |
| 275 | { |
| 276 | switch (command) { |
| 277 | case MLX5_CMD_OP_QUERY_HCA_CAP: |
| 278 | return "QUERY_HCA_CAP"; |
| 279 | |
| 280 | case MLX5_CMD_OP_SET_HCA_CAP: |
| 281 | return "SET_HCA_CAP"; |
| 282 | |
| 283 | case MLX5_CMD_OP_QUERY_ADAPTER: |
| 284 | return "QUERY_ADAPTER"; |
| 285 | |
| 286 | case MLX5_CMD_OP_INIT_HCA: |
| 287 | return "INIT_HCA"; |
| 288 | |
| 289 | case MLX5_CMD_OP_TEARDOWN_HCA: |
| 290 | return "TEARDOWN_HCA"; |
| 291 | |
Eli Cohen | cd23b14 | 2013-07-18 15:31:08 +0300 | [diff] [blame] | 292 | case MLX5_CMD_OP_ENABLE_HCA: |
| 293 | return "MLX5_CMD_OP_ENABLE_HCA"; |
| 294 | |
| 295 | case MLX5_CMD_OP_DISABLE_HCA: |
| 296 | return "MLX5_CMD_OP_DISABLE_HCA"; |
| 297 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 298 | case MLX5_CMD_OP_QUERY_PAGES: |
| 299 | return "QUERY_PAGES"; |
| 300 | |
| 301 | case MLX5_CMD_OP_MANAGE_PAGES: |
| 302 | return "MANAGE_PAGES"; |
| 303 | |
| 304 | case MLX5_CMD_OP_CREATE_MKEY: |
| 305 | return "CREATE_MKEY"; |
| 306 | |
| 307 | case MLX5_CMD_OP_QUERY_MKEY: |
| 308 | return "QUERY_MKEY"; |
| 309 | |
| 310 | case MLX5_CMD_OP_DESTROY_MKEY: |
| 311 | return "DESTROY_MKEY"; |
| 312 | |
| 313 | case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS: |
| 314 | return "QUERY_SPECIAL_CONTEXTS"; |
| 315 | |
| 316 | case MLX5_CMD_OP_CREATE_EQ: |
| 317 | return "CREATE_EQ"; |
| 318 | |
| 319 | case MLX5_CMD_OP_DESTROY_EQ: |
| 320 | return "DESTROY_EQ"; |
| 321 | |
| 322 | case MLX5_CMD_OP_QUERY_EQ: |
| 323 | return "QUERY_EQ"; |
| 324 | |
| 325 | case MLX5_CMD_OP_CREATE_CQ: |
| 326 | return "CREATE_CQ"; |
| 327 | |
| 328 | case MLX5_CMD_OP_DESTROY_CQ: |
| 329 | return "DESTROY_CQ"; |
| 330 | |
| 331 | case MLX5_CMD_OP_QUERY_CQ: |
| 332 | return "QUERY_CQ"; |
| 333 | |
| 334 | case MLX5_CMD_OP_MODIFY_CQ: |
| 335 | return "MODIFY_CQ"; |
| 336 | |
| 337 | case MLX5_CMD_OP_CREATE_QP: |
| 338 | return "CREATE_QP"; |
| 339 | |
| 340 | case MLX5_CMD_OP_DESTROY_QP: |
| 341 | return "DESTROY_QP"; |
| 342 | |
| 343 | case MLX5_CMD_OP_RST2INIT_QP: |
| 344 | return "RST2INIT_QP"; |
| 345 | |
| 346 | case MLX5_CMD_OP_INIT2RTR_QP: |
| 347 | return "INIT2RTR_QP"; |
| 348 | |
| 349 | case MLX5_CMD_OP_RTR2RTS_QP: |
| 350 | return "RTR2RTS_QP"; |
| 351 | |
| 352 | case MLX5_CMD_OP_RTS2RTS_QP: |
| 353 | return "RTS2RTS_QP"; |
| 354 | |
| 355 | case MLX5_CMD_OP_SQERR2RTS_QP: |
| 356 | return "SQERR2RTS_QP"; |
| 357 | |
| 358 | case MLX5_CMD_OP_2ERR_QP: |
| 359 | return "2ERR_QP"; |
| 360 | |
| 361 | case MLX5_CMD_OP_RTS2SQD_QP: |
| 362 | return "RTS2SQD_QP"; |
| 363 | |
| 364 | case MLX5_CMD_OP_SQD2RTS_QP: |
| 365 | return "SQD2RTS_QP"; |
| 366 | |
| 367 | case MLX5_CMD_OP_2RST_QP: |
| 368 | return "2RST_QP"; |
| 369 | |
| 370 | case MLX5_CMD_OP_QUERY_QP: |
| 371 | return "QUERY_QP"; |
| 372 | |
| 373 | case MLX5_CMD_OP_CONF_SQP: |
| 374 | return "CONF_SQP"; |
| 375 | |
| 376 | case MLX5_CMD_OP_MAD_IFC: |
| 377 | return "MAD_IFC"; |
| 378 | |
| 379 | case MLX5_CMD_OP_INIT2INIT_QP: |
| 380 | return "INIT2INIT_QP"; |
| 381 | |
| 382 | case MLX5_CMD_OP_SUSPEND_QP: |
| 383 | return "SUSPEND_QP"; |
| 384 | |
| 385 | case MLX5_CMD_OP_UNSUSPEND_QP: |
| 386 | return "UNSUSPEND_QP"; |
| 387 | |
| 388 | case MLX5_CMD_OP_SQD2SQD_QP: |
| 389 | return "SQD2SQD_QP"; |
| 390 | |
| 391 | case MLX5_CMD_OP_ALLOC_QP_COUNTER_SET: |
| 392 | return "ALLOC_QP_COUNTER_SET"; |
| 393 | |
| 394 | case MLX5_CMD_OP_DEALLOC_QP_COUNTER_SET: |
| 395 | return "DEALLOC_QP_COUNTER_SET"; |
| 396 | |
| 397 | case MLX5_CMD_OP_QUERY_QP_COUNTER_SET: |
| 398 | return "QUERY_QP_COUNTER_SET"; |
| 399 | |
| 400 | case MLX5_CMD_OP_CREATE_PSV: |
| 401 | return "CREATE_PSV"; |
| 402 | |
| 403 | case MLX5_CMD_OP_DESTROY_PSV: |
| 404 | return "DESTROY_PSV"; |
| 405 | |
| 406 | case MLX5_CMD_OP_QUERY_PSV: |
| 407 | return "QUERY_PSV"; |
| 408 | |
| 409 | case MLX5_CMD_OP_QUERY_SIG_RULE_TABLE: |
| 410 | return "QUERY_SIG_RULE_TABLE"; |
| 411 | |
| 412 | case MLX5_CMD_OP_QUERY_BLOCK_SIZE_TABLE: |
| 413 | return "QUERY_BLOCK_SIZE_TABLE"; |
| 414 | |
| 415 | case MLX5_CMD_OP_CREATE_SRQ: |
| 416 | return "CREATE_SRQ"; |
| 417 | |
| 418 | case MLX5_CMD_OP_DESTROY_SRQ: |
| 419 | return "DESTROY_SRQ"; |
| 420 | |
| 421 | case MLX5_CMD_OP_QUERY_SRQ: |
| 422 | return "QUERY_SRQ"; |
| 423 | |
| 424 | case MLX5_CMD_OP_ARM_RQ: |
| 425 | return "ARM_RQ"; |
| 426 | |
| 427 | case MLX5_CMD_OP_RESIZE_SRQ: |
| 428 | return "RESIZE_SRQ"; |
| 429 | |
| 430 | case MLX5_CMD_OP_ALLOC_PD: |
| 431 | return "ALLOC_PD"; |
| 432 | |
| 433 | case MLX5_CMD_OP_DEALLOC_PD: |
| 434 | return "DEALLOC_PD"; |
| 435 | |
| 436 | case MLX5_CMD_OP_ALLOC_UAR: |
| 437 | return "ALLOC_UAR"; |
| 438 | |
| 439 | case MLX5_CMD_OP_DEALLOC_UAR: |
| 440 | return "DEALLOC_UAR"; |
| 441 | |
| 442 | case MLX5_CMD_OP_ATTACH_TO_MCG: |
| 443 | return "ATTACH_TO_MCG"; |
| 444 | |
| 445 | case MLX5_CMD_OP_DETACH_FROM_MCG: |
| 446 | return "DETACH_FROM_MCG"; |
| 447 | |
| 448 | case MLX5_CMD_OP_ALLOC_XRCD: |
| 449 | return "ALLOC_XRCD"; |
| 450 | |
| 451 | case MLX5_CMD_OP_DEALLOC_XRCD: |
| 452 | return "DEALLOC_XRCD"; |
| 453 | |
| 454 | case MLX5_CMD_OP_ACCESS_REG: |
| 455 | return "MLX5_CMD_OP_ACCESS_REG"; |
| 456 | |
| 457 | default: return "unknown command opcode"; |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | static void dump_command(struct mlx5_core_dev *dev, |
| 462 | struct mlx5_cmd_work_ent *ent, int input) |
| 463 | { |
| 464 | u16 op = be16_to_cpu(((struct mlx5_inbox_hdr *)(ent->lay->in))->opcode); |
| 465 | struct mlx5_cmd_msg *msg = input ? ent->in : ent->out; |
| 466 | struct mlx5_cmd_mailbox *next = msg->next; |
| 467 | int data_only; |
| 468 | int offset = 0; |
| 469 | int dump_len; |
| 470 | |
| 471 | data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA)); |
| 472 | |
| 473 | if (data_only) |
| 474 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA, |
| 475 | "dump command data %s(0x%x) %s\n", |
| 476 | mlx5_command_str(op), op, |
| 477 | input ? "INPUT" : "OUTPUT"); |
| 478 | else |
| 479 | mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n", |
| 480 | mlx5_command_str(op), op, |
| 481 | input ? "INPUT" : "OUTPUT"); |
| 482 | |
| 483 | if (data_only) { |
| 484 | if (input) { |
| 485 | dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset); |
| 486 | offset += sizeof(ent->lay->in); |
| 487 | } else { |
| 488 | dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset); |
| 489 | offset += sizeof(ent->lay->out); |
| 490 | } |
| 491 | } else { |
| 492 | dump_buf(ent->lay, sizeof(*ent->lay), 0, offset); |
| 493 | offset += sizeof(*ent->lay); |
| 494 | } |
| 495 | |
| 496 | while (next && offset < msg->len) { |
| 497 | if (data_only) { |
| 498 | dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset); |
| 499 | dump_buf(next->buf, dump_len, 1, offset); |
| 500 | offset += MLX5_CMD_DATA_BLOCK_SIZE; |
| 501 | } else { |
| 502 | mlx5_core_dbg(dev, "command block:\n"); |
| 503 | dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset); |
| 504 | offset += sizeof(struct mlx5_cmd_prot_block); |
| 505 | } |
| 506 | next = next->next; |
| 507 | } |
| 508 | |
| 509 | if (data_only) |
| 510 | pr_debug("\n"); |
| 511 | } |
| 512 | |
| 513 | static void cmd_work_handler(struct work_struct *work) |
| 514 | { |
| 515 | struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work); |
| 516 | struct mlx5_cmd *cmd = ent->cmd; |
| 517 | struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd); |
| 518 | struct mlx5_cmd_layout *lay; |
| 519 | struct semaphore *sem; |
| 520 | |
| 521 | sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem; |
| 522 | down(sem); |
| 523 | if (!ent->page_queue) { |
| 524 | ent->idx = alloc_ent(cmd); |
| 525 | if (ent->idx < 0) { |
| 526 | mlx5_core_err(dev, "failed to allocate command entry\n"); |
| 527 | up(sem); |
| 528 | return; |
| 529 | } |
| 530 | } else { |
| 531 | ent->idx = cmd->max_reg_cmds; |
| 532 | } |
| 533 | |
| 534 | ent->token = alloc_token(cmd); |
| 535 | cmd->ent_arr[ent->idx] = ent; |
| 536 | lay = get_inst(cmd, ent->idx); |
| 537 | ent->lay = lay; |
| 538 | memset(lay, 0, sizeof(*lay)); |
| 539 | memcpy(lay->in, ent->in->first.data, sizeof(lay->in)); |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 540 | ent->op = be32_to_cpu(lay->in[0]) >> 16; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 541 | if (ent->in->next) |
| 542 | lay->in_ptr = cpu_to_be64(ent->in->next->dma); |
| 543 | lay->inlen = cpu_to_be32(ent->in->len); |
| 544 | if (ent->out->next) |
| 545 | lay->out_ptr = cpu_to_be64(ent->out->next->dma); |
| 546 | lay->outlen = cpu_to_be32(ent->out->len); |
| 547 | lay->type = MLX5_PCI_CMD_XPORT; |
| 548 | lay->token = ent->token; |
| 549 | lay->status_own = CMD_OWNER_HW; |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 550 | set_signature(ent, !cmd->checksum_disabled); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 551 | dump_command(dev, ent, 1); |
| 552 | ktime_get_ts(&ent->ts1); |
| 553 | |
| 554 | /* ring doorbell after the descriptor is valid */ |
| 555 | wmb(); |
| 556 | iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell); |
| 557 | mlx5_core_dbg(dev, "write 0x%x to command doorbell\n", 1 << ent->idx); |
| 558 | mmiowb(); |
| 559 | if (cmd->mode == CMD_MODE_POLLING) { |
| 560 | poll_timeout(ent); |
| 561 | /* make sure we read the descriptor after ownership is SW */ |
| 562 | rmb(); |
| 563 | mlx5_cmd_comp_handler(dev, 1UL << ent->idx); |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | static const char *deliv_status_to_str(u8 status) |
| 568 | { |
| 569 | switch (status) { |
| 570 | case MLX5_CMD_DELIVERY_STAT_OK: |
| 571 | return "no errors"; |
| 572 | case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR: |
| 573 | return "signature error"; |
| 574 | case MLX5_CMD_DELIVERY_STAT_TOK_ERR: |
| 575 | return "token error"; |
| 576 | case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR: |
| 577 | return "bad block number"; |
| 578 | case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR: |
| 579 | return "output pointer not aligned to block size"; |
| 580 | case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR: |
| 581 | return "input pointer not aligned to block size"; |
| 582 | case MLX5_CMD_DELIVERY_STAT_FW_ERR: |
| 583 | return "firmware internal error"; |
| 584 | case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR: |
| 585 | return "command input length error"; |
| 586 | case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR: |
| 587 | return "command ouput length error"; |
| 588 | case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR: |
| 589 | return "reserved fields not cleared"; |
| 590 | case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR: |
| 591 | return "bad command descriptor type"; |
| 592 | default: |
| 593 | return "unknown status code"; |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | static u16 msg_to_opcode(struct mlx5_cmd_msg *in) |
| 598 | { |
| 599 | struct mlx5_inbox_hdr *hdr = (struct mlx5_inbox_hdr *)(in->first.data); |
| 600 | |
| 601 | return be16_to_cpu(hdr->opcode); |
| 602 | } |
| 603 | |
| 604 | static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent) |
| 605 | { |
| 606 | unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC); |
| 607 | struct mlx5_cmd *cmd = &dev->cmd; |
| 608 | int err; |
| 609 | |
| 610 | if (cmd->mode == CMD_MODE_POLLING) { |
| 611 | wait_for_completion(&ent->done); |
| 612 | err = ent->ret; |
| 613 | } else { |
| 614 | if (!wait_for_completion_timeout(&ent->done, timeout)) |
| 615 | err = -ETIMEDOUT; |
| 616 | else |
| 617 | err = 0; |
| 618 | } |
| 619 | if (err == -ETIMEDOUT) { |
| 620 | mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n", |
| 621 | mlx5_command_str(msg_to_opcode(ent->in)), |
| 622 | msg_to_opcode(ent->in)); |
| 623 | } |
| 624 | mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n", err, |
| 625 | deliv_status_to_str(ent->status), ent->status); |
| 626 | |
| 627 | return err; |
| 628 | } |
| 629 | |
| 630 | /* Notes: |
| 631 | * 1. Callback functions may not sleep |
| 632 | * 2. page queue commands do not support asynchrous completion |
| 633 | */ |
| 634 | static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in, |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 635 | struct mlx5_cmd_msg *out, void *uout, int uout_size, |
| 636 | mlx5_cmd_cbk_t callback, |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 637 | void *context, int page_queue, u8 *status) |
| 638 | { |
| 639 | struct mlx5_cmd *cmd = &dev->cmd; |
| 640 | struct mlx5_cmd_work_ent *ent; |
| 641 | ktime_t t1, t2, delta; |
| 642 | struct mlx5_cmd_stats *stats; |
| 643 | int err = 0; |
| 644 | s64 ds; |
| 645 | u16 op; |
| 646 | |
| 647 | if (callback && page_queue) |
| 648 | return -EINVAL; |
| 649 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 650 | ent = alloc_cmd(cmd, in, out, uout, uout_size, callback, context, |
| 651 | page_queue); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 652 | if (IS_ERR(ent)) |
| 653 | return PTR_ERR(ent); |
| 654 | |
| 655 | if (!callback) |
| 656 | init_completion(&ent->done); |
| 657 | |
| 658 | INIT_WORK(&ent->work, cmd_work_handler); |
| 659 | if (page_queue) { |
| 660 | cmd_work_handler(&ent->work); |
| 661 | } else if (!queue_work(cmd->wq, &ent->work)) { |
| 662 | mlx5_core_warn(dev, "failed to queue work\n"); |
| 663 | err = -ENOMEM; |
| 664 | goto out_free; |
| 665 | } |
| 666 | |
| 667 | if (!callback) { |
| 668 | err = wait_func(dev, ent); |
| 669 | if (err == -ETIMEDOUT) |
| 670 | goto out; |
| 671 | |
| 672 | t1 = timespec_to_ktime(ent->ts1); |
| 673 | t2 = timespec_to_ktime(ent->ts2); |
| 674 | delta = ktime_sub(t2, t1); |
| 675 | ds = ktime_to_ns(delta); |
| 676 | op = be16_to_cpu(((struct mlx5_inbox_hdr *)in->first.data)->opcode); |
| 677 | if (op < ARRAY_SIZE(cmd->stats)) { |
| 678 | stats = &cmd->stats[op]; |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 679 | spin_lock_irq(&stats->lock); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 680 | stats->sum += ds; |
| 681 | ++stats->n; |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 682 | spin_unlock_irq(&stats->lock); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 683 | } |
| 684 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME, |
| 685 | "fw exec time for %s is %lld nsec\n", |
| 686 | mlx5_command_str(op), ds); |
| 687 | *status = ent->status; |
| 688 | free_cmd(ent); |
| 689 | } |
| 690 | |
| 691 | return err; |
| 692 | |
| 693 | out_free: |
| 694 | free_cmd(ent); |
| 695 | out: |
| 696 | return err; |
| 697 | } |
| 698 | |
| 699 | static ssize_t dbg_write(struct file *filp, const char __user *buf, |
| 700 | size_t count, loff_t *pos) |
| 701 | { |
| 702 | struct mlx5_core_dev *dev = filp->private_data; |
| 703 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| 704 | char lbuf[3]; |
| 705 | int err; |
| 706 | |
| 707 | if (!dbg->in_msg || !dbg->out_msg) |
| 708 | return -ENOMEM; |
| 709 | |
| 710 | if (copy_from_user(lbuf, buf, sizeof(lbuf))) |
Dan Carpenter | 5e631a0 | 2013-07-10 13:58:59 +0300 | [diff] [blame] | 711 | return -EFAULT; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 712 | |
| 713 | lbuf[sizeof(lbuf) - 1] = 0; |
| 714 | |
| 715 | if (strcmp(lbuf, "go")) |
| 716 | return -EINVAL; |
| 717 | |
| 718 | err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen); |
| 719 | |
| 720 | return err ? err : count; |
| 721 | } |
| 722 | |
| 723 | |
| 724 | static const struct file_operations fops = { |
| 725 | .owner = THIS_MODULE, |
| 726 | .open = simple_open, |
| 727 | .write = dbg_write, |
| 728 | }; |
| 729 | |
| 730 | static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size) |
| 731 | { |
| 732 | struct mlx5_cmd_prot_block *block; |
| 733 | struct mlx5_cmd_mailbox *next; |
| 734 | int copy; |
| 735 | |
| 736 | if (!to || !from) |
| 737 | return -ENOMEM; |
| 738 | |
| 739 | copy = min_t(int, size, sizeof(to->first.data)); |
| 740 | memcpy(to->first.data, from, copy); |
| 741 | size -= copy; |
| 742 | from += copy; |
| 743 | |
| 744 | next = to->next; |
| 745 | while (size) { |
| 746 | if (!next) { |
| 747 | /* this is a BUG */ |
| 748 | return -ENOMEM; |
| 749 | } |
| 750 | |
| 751 | copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); |
| 752 | block = next->buf; |
| 753 | memcpy(block->data, from, copy); |
| 754 | from += copy; |
| 755 | size -= copy; |
| 756 | next = next->next; |
| 757 | } |
| 758 | |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size) |
| 763 | { |
| 764 | struct mlx5_cmd_prot_block *block; |
| 765 | struct mlx5_cmd_mailbox *next; |
| 766 | int copy; |
| 767 | |
| 768 | if (!to || !from) |
| 769 | return -ENOMEM; |
| 770 | |
| 771 | copy = min_t(int, size, sizeof(from->first.data)); |
| 772 | memcpy(to, from->first.data, copy); |
| 773 | size -= copy; |
| 774 | to += copy; |
| 775 | |
| 776 | next = from->next; |
| 777 | while (size) { |
| 778 | if (!next) { |
| 779 | /* this is a BUG */ |
| 780 | return -ENOMEM; |
| 781 | } |
| 782 | |
| 783 | copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); |
| 784 | block = next->buf; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 785 | |
| 786 | memcpy(to, block->data, copy); |
| 787 | to += copy; |
| 788 | size -= copy; |
| 789 | next = next->next; |
| 790 | } |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev, |
| 796 | gfp_t flags) |
| 797 | { |
| 798 | struct mlx5_cmd_mailbox *mailbox; |
| 799 | |
| 800 | mailbox = kmalloc(sizeof(*mailbox), flags); |
| 801 | if (!mailbox) |
| 802 | return ERR_PTR(-ENOMEM); |
| 803 | |
| 804 | mailbox->buf = pci_pool_alloc(dev->cmd.pool, flags, |
| 805 | &mailbox->dma); |
| 806 | if (!mailbox->buf) { |
| 807 | mlx5_core_dbg(dev, "failed allocation\n"); |
| 808 | kfree(mailbox); |
| 809 | return ERR_PTR(-ENOMEM); |
| 810 | } |
| 811 | memset(mailbox->buf, 0, sizeof(struct mlx5_cmd_prot_block)); |
| 812 | mailbox->next = NULL; |
| 813 | |
| 814 | return mailbox; |
| 815 | } |
| 816 | |
| 817 | static void free_cmd_box(struct mlx5_core_dev *dev, |
| 818 | struct mlx5_cmd_mailbox *mailbox) |
| 819 | { |
| 820 | pci_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma); |
| 821 | kfree(mailbox); |
| 822 | } |
| 823 | |
| 824 | static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev, |
| 825 | gfp_t flags, int size) |
| 826 | { |
| 827 | struct mlx5_cmd_mailbox *tmp, *head = NULL; |
| 828 | struct mlx5_cmd_prot_block *block; |
| 829 | struct mlx5_cmd_msg *msg; |
| 830 | int blen; |
| 831 | int err; |
| 832 | int n; |
| 833 | int i; |
| 834 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 835 | msg = kzalloc(sizeof(*msg), flags); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 836 | if (!msg) |
| 837 | return ERR_PTR(-ENOMEM); |
| 838 | |
| 839 | blen = size - min_t(int, sizeof(msg->first.data), size); |
| 840 | n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1) / MLX5_CMD_DATA_BLOCK_SIZE; |
| 841 | |
| 842 | for (i = 0; i < n; i++) { |
| 843 | tmp = alloc_cmd_box(dev, flags); |
| 844 | if (IS_ERR(tmp)) { |
| 845 | mlx5_core_warn(dev, "failed allocating block\n"); |
| 846 | err = PTR_ERR(tmp); |
| 847 | goto err_alloc; |
| 848 | } |
| 849 | |
| 850 | block = tmp->buf; |
| 851 | tmp->next = head; |
| 852 | block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0); |
| 853 | block->block_num = cpu_to_be32(n - i - 1); |
| 854 | head = tmp; |
| 855 | } |
| 856 | msg->next = head; |
| 857 | msg->len = size; |
| 858 | return msg; |
| 859 | |
| 860 | err_alloc: |
| 861 | while (head) { |
| 862 | tmp = head->next; |
| 863 | free_cmd_box(dev, head); |
| 864 | head = tmp; |
| 865 | } |
| 866 | kfree(msg); |
| 867 | |
| 868 | return ERR_PTR(err); |
| 869 | } |
| 870 | |
| 871 | static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev, |
| 872 | struct mlx5_cmd_msg *msg) |
| 873 | { |
| 874 | struct mlx5_cmd_mailbox *head = msg->next; |
| 875 | struct mlx5_cmd_mailbox *next; |
| 876 | |
| 877 | while (head) { |
| 878 | next = head->next; |
| 879 | free_cmd_box(dev, head); |
| 880 | head = next; |
| 881 | } |
| 882 | kfree(msg); |
| 883 | } |
| 884 | |
| 885 | static ssize_t data_write(struct file *filp, const char __user *buf, |
| 886 | size_t count, loff_t *pos) |
| 887 | { |
| 888 | struct mlx5_core_dev *dev = filp->private_data; |
| 889 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| 890 | void *ptr; |
| 891 | int err; |
| 892 | |
| 893 | if (*pos != 0) |
| 894 | return -EINVAL; |
| 895 | |
| 896 | kfree(dbg->in_msg); |
| 897 | dbg->in_msg = NULL; |
| 898 | dbg->inlen = 0; |
| 899 | |
| 900 | ptr = kzalloc(count, GFP_KERNEL); |
| 901 | if (!ptr) |
| 902 | return -ENOMEM; |
| 903 | |
| 904 | if (copy_from_user(ptr, buf, count)) { |
Dan Carpenter | 5e631a0 | 2013-07-10 13:58:59 +0300 | [diff] [blame] | 905 | err = -EFAULT; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 906 | goto out; |
| 907 | } |
| 908 | dbg->in_msg = ptr; |
| 909 | dbg->inlen = count; |
| 910 | |
| 911 | *pos = count; |
| 912 | |
| 913 | return count; |
| 914 | |
| 915 | out: |
| 916 | kfree(ptr); |
| 917 | return err; |
| 918 | } |
| 919 | |
| 920 | static ssize_t data_read(struct file *filp, char __user *buf, size_t count, |
| 921 | loff_t *pos) |
| 922 | { |
| 923 | struct mlx5_core_dev *dev = filp->private_data; |
| 924 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| 925 | int copy; |
| 926 | |
| 927 | if (*pos) |
| 928 | return 0; |
| 929 | |
| 930 | if (!dbg->out_msg) |
| 931 | return -ENOMEM; |
| 932 | |
| 933 | copy = min_t(int, count, dbg->outlen); |
| 934 | if (copy_to_user(buf, dbg->out_msg, copy)) |
Dan Carpenter | 5e631a0 | 2013-07-10 13:58:59 +0300 | [diff] [blame] | 935 | return -EFAULT; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 936 | |
| 937 | *pos += copy; |
| 938 | |
| 939 | return copy; |
| 940 | } |
| 941 | |
| 942 | static const struct file_operations dfops = { |
| 943 | .owner = THIS_MODULE, |
| 944 | .open = simple_open, |
| 945 | .write = data_write, |
| 946 | .read = data_read, |
| 947 | }; |
| 948 | |
| 949 | static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count, |
| 950 | loff_t *pos) |
| 951 | { |
| 952 | struct mlx5_core_dev *dev = filp->private_data; |
| 953 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| 954 | char outlen[8]; |
| 955 | int err; |
| 956 | |
| 957 | if (*pos) |
| 958 | return 0; |
| 959 | |
| 960 | err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen); |
| 961 | if (err < 0) |
| 962 | return err; |
| 963 | |
| 964 | if (copy_to_user(buf, &outlen, err)) |
Dan Carpenter | 5e631a0 | 2013-07-10 13:58:59 +0300 | [diff] [blame] | 965 | return -EFAULT; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 966 | |
| 967 | *pos += err; |
| 968 | |
| 969 | return err; |
| 970 | } |
| 971 | |
| 972 | static ssize_t outlen_write(struct file *filp, const char __user *buf, |
| 973 | size_t count, loff_t *pos) |
| 974 | { |
| 975 | struct mlx5_core_dev *dev = filp->private_data; |
| 976 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| 977 | char outlen_str[8]; |
| 978 | int outlen; |
| 979 | void *ptr; |
| 980 | int err; |
| 981 | |
| 982 | if (*pos != 0 || count > 6) |
| 983 | return -EINVAL; |
| 984 | |
| 985 | kfree(dbg->out_msg); |
| 986 | dbg->out_msg = NULL; |
| 987 | dbg->outlen = 0; |
| 988 | |
| 989 | if (copy_from_user(outlen_str, buf, count)) |
Dan Carpenter | 5e631a0 | 2013-07-10 13:58:59 +0300 | [diff] [blame] | 990 | return -EFAULT; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 991 | |
| 992 | outlen_str[7] = 0; |
| 993 | |
| 994 | err = sscanf(outlen_str, "%d", &outlen); |
| 995 | if (err < 0) |
| 996 | return err; |
| 997 | |
| 998 | ptr = kzalloc(outlen, GFP_KERNEL); |
| 999 | if (!ptr) |
| 1000 | return -ENOMEM; |
| 1001 | |
| 1002 | dbg->out_msg = ptr; |
| 1003 | dbg->outlen = outlen; |
| 1004 | |
| 1005 | *pos = count; |
| 1006 | |
| 1007 | return count; |
| 1008 | } |
| 1009 | |
| 1010 | static const struct file_operations olfops = { |
| 1011 | .owner = THIS_MODULE, |
| 1012 | .open = simple_open, |
| 1013 | .write = outlen_write, |
| 1014 | .read = outlen_read, |
| 1015 | }; |
| 1016 | |
| 1017 | static void set_wqname(struct mlx5_core_dev *dev) |
| 1018 | { |
| 1019 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1020 | |
| 1021 | snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s", |
| 1022 | dev_name(&dev->pdev->dev)); |
| 1023 | } |
| 1024 | |
| 1025 | static void clean_debug_files(struct mlx5_core_dev *dev) |
| 1026 | { |
| 1027 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| 1028 | |
| 1029 | if (!mlx5_debugfs_root) |
| 1030 | return; |
| 1031 | |
| 1032 | mlx5_cmdif_debugfs_cleanup(dev); |
| 1033 | debugfs_remove_recursive(dbg->dbg_root); |
| 1034 | } |
| 1035 | |
| 1036 | static int create_debugfs_files(struct mlx5_core_dev *dev) |
| 1037 | { |
| 1038 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| 1039 | int err = -ENOMEM; |
| 1040 | |
| 1041 | if (!mlx5_debugfs_root) |
| 1042 | return 0; |
| 1043 | |
| 1044 | dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root); |
| 1045 | if (!dbg->dbg_root) |
| 1046 | return err; |
| 1047 | |
| 1048 | dbg->dbg_in = debugfs_create_file("in", 0400, dbg->dbg_root, |
| 1049 | dev, &dfops); |
| 1050 | if (!dbg->dbg_in) |
| 1051 | goto err_dbg; |
| 1052 | |
| 1053 | dbg->dbg_out = debugfs_create_file("out", 0200, dbg->dbg_root, |
| 1054 | dev, &dfops); |
| 1055 | if (!dbg->dbg_out) |
| 1056 | goto err_dbg; |
| 1057 | |
| 1058 | dbg->dbg_outlen = debugfs_create_file("out_len", 0600, dbg->dbg_root, |
| 1059 | dev, &olfops); |
| 1060 | if (!dbg->dbg_outlen) |
| 1061 | goto err_dbg; |
| 1062 | |
| 1063 | dbg->dbg_status = debugfs_create_u8("status", 0600, dbg->dbg_root, |
| 1064 | &dbg->status); |
| 1065 | if (!dbg->dbg_status) |
| 1066 | goto err_dbg; |
| 1067 | |
| 1068 | dbg->dbg_run = debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops); |
| 1069 | if (!dbg->dbg_run) |
| 1070 | goto err_dbg; |
| 1071 | |
| 1072 | mlx5_cmdif_debugfs_init(dev); |
| 1073 | |
| 1074 | return 0; |
| 1075 | |
| 1076 | err_dbg: |
| 1077 | clean_debug_files(dev); |
| 1078 | return err; |
| 1079 | } |
| 1080 | |
| 1081 | void mlx5_cmd_use_events(struct mlx5_core_dev *dev) |
| 1082 | { |
| 1083 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1084 | int i; |
| 1085 | |
| 1086 | for (i = 0; i < cmd->max_reg_cmds; i++) |
| 1087 | down(&cmd->sem); |
| 1088 | |
| 1089 | down(&cmd->pages_sem); |
| 1090 | |
| 1091 | flush_workqueue(cmd->wq); |
| 1092 | |
| 1093 | cmd->mode = CMD_MODE_EVENTS; |
| 1094 | |
| 1095 | up(&cmd->pages_sem); |
| 1096 | for (i = 0; i < cmd->max_reg_cmds; i++) |
| 1097 | up(&cmd->sem); |
| 1098 | } |
| 1099 | |
| 1100 | void mlx5_cmd_use_polling(struct mlx5_core_dev *dev) |
| 1101 | { |
| 1102 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1103 | int i; |
| 1104 | |
| 1105 | for (i = 0; i < cmd->max_reg_cmds; i++) |
| 1106 | down(&cmd->sem); |
| 1107 | |
| 1108 | down(&cmd->pages_sem); |
| 1109 | |
| 1110 | flush_workqueue(cmd->wq); |
| 1111 | cmd->mode = CMD_MODE_POLLING; |
| 1112 | |
| 1113 | up(&cmd->pages_sem); |
| 1114 | for (i = 0; i < cmd->max_reg_cmds; i++) |
| 1115 | up(&cmd->sem); |
| 1116 | } |
| 1117 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1118 | static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg) |
| 1119 | { |
| 1120 | unsigned long flags; |
| 1121 | |
| 1122 | if (msg->cache) { |
| 1123 | spin_lock_irqsave(&msg->cache->lock, flags); |
| 1124 | list_add_tail(&msg->list, &msg->cache->head); |
| 1125 | spin_unlock_irqrestore(&msg->cache->lock, flags); |
| 1126 | } else { |
| 1127 | mlx5_free_cmd_msg(dev, msg); |
| 1128 | } |
| 1129 | } |
| 1130 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1131 | void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) |
| 1132 | { |
| 1133 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1134 | struct mlx5_cmd_work_ent *ent; |
| 1135 | mlx5_cmd_cbk_t callback; |
| 1136 | void *context; |
| 1137 | int err; |
| 1138 | int i; |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1139 | ktime_t t1, t2, delta; |
| 1140 | s64 ds; |
| 1141 | struct mlx5_cmd_stats *stats; |
| 1142 | unsigned long flags; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1143 | |
| 1144 | for (i = 0; i < (1 << cmd->log_sz); i++) { |
| 1145 | if (test_bit(i, &vector)) { |
Dan Carpenter | 11940c8 | 2013-07-22 11:02:01 +0300 | [diff] [blame] | 1146 | struct semaphore *sem; |
| 1147 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1148 | ent = cmd->ent_arr[i]; |
Dan Carpenter | 11940c8 | 2013-07-22 11:02:01 +0300 | [diff] [blame] | 1149 | if (ent->page_queue) |
| 1150 | sem = &cmd->pages_sem; |
| 1151 | else |
| 1152 | sem = &cmd->sem; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1153 | ktime_get_ts(&ent->ts2); |
| 1154 | memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); |
| 1155 | dump_command(dev, ent, 0); |
| 1156 | if (!ent->ret) { |
| 1157 | if (!cmd->checksum_disabled) |
| 1158 | ent->ret = verify_signature(ent); |
| 1159 | else |
| 1160 | ent->ret = 0; |
| 1161 | ent->status = ent->lay->status_own >> 1; |
| 1162 | mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n", |
| 1163 | ent->ret, deliv_status_to_str(ent->status), ent->status); |
| 1164 | } |
| 1165 | free_ent(cmd, ent->idx); |
| 1166 | if (ent->callback) { |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1167 | t1 = timespec_to_ktime(ent->ts1); |
| 1168 | t2 = timespec_to_ktime(ent->ts2); |
| 1169 | delta = ktime_sub(t2, t1); |
| 1170 | ds = ktime_to_ns(delta); |
| 1171 | if (ent->op < ARRAY_SIZE(cmd->stats)) { |
| 1172 | stats = &cmd->stats[ent->op]; |
| 1173 | spin_lock_irqsave(&stats->lock, flags); |
| 1174 | stats->sum += ds; |
| 1175 | ++stats->n; |
| 1176 | spin_unlock_irqrestore(&stats->lock, flags); |
| 1177 | } |
| 1178 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1179 | callback = ent->callback; |
| 1180 | context = ent->context; |
| 1181 | err = ent->ret; |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1182 | if (!err) |
| 1183 | err = mlx5_copy_from_msg(ent->uout, |
| 1184 | ent->out, |
| 1185 | ent->uout_size); |
| 1186 | |
| 1187 | mlx5_free_cmd_msg(dev, ent->out); |
| 1188 | free_msg(dev, ent->in); |
| 1189 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1190 | free_cmd(ent); |
| 1191 | callback(err, context); |
| 1192 | } else { |
| 1193 | complete(&ent->done); |
| 1194 | } |
Dan Carpenter | 11940c8 | 2013-07-22 11:02:01 +0300 | [diff] [blame] | 1195 | up(sem); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1196 | } |
| 1197 | } |
| 1198 | } |
| 1199 | EXPORT_SYMBOL(mlx5_cmd_comp_handler); |
| 1200 | |
| 1201 | static int status_to_err(u8 status) |
| 1202 | { |
| 1203 | return status ? -1 : 0; /* TBD more meaningful codes */ |
| 1204 | } |
| 1205 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1206 | static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size, |
| 1207 | gfp_t gfp) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1208 | { |
| 1209 | struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM); |
| 1210 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1211 | struct cache_ent *ent = NULL; |
| 1212 | |
| 1213 | if (in_size > MED_LIST_SIZE && in_size <= LONG_LIST_SIZE) |
| 1214 | ent = &cmd->cache.large; |
| 1215 | else if (in_size > 16 && in_size <= MED_LIST_SIZE) |
| 1216 | ent = &cmd->cache.med; |
| 1217 | |
| 1218 | if (ent) { |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1219 | spin_lock_irq(&ent->lock); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1220 | if (!list_empty(&ent->head)) { |
| 1221 | msg = list_entry(ent->head.next, typeof(*msg), list); |
| 1222 | /* For cached lists, we must explicitly state what is |
| 1223 | * the real size |
| 1224 | */ |
| 1225 | msg->len = in_size; |
| 1226 | list_del(&msg->list); |
| 1227 | } |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1228 | spin_unlock_irq(&ent->lock); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | if (IS_ERR(msg)) |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1232 | msg = mlx5_alloc_cmd_msg(dev, gfp, in_size); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1233 | |
| 1234 | return msg; |
| 1235 | } |
| 1236 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1237 | static int is_manage_pages(struct mlx5_inbox_hdr *in) |
| 1238 | { |
| 1239 | return be16_to_cpu(in->opcode) == MLX5_CMD_OP_MANAGE_PAGES; |
| 1240 | } |
| 1241 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1242 | static int cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, |
| 1243 | int out_size, mlx5_cmd_cbk_t callback, void *context) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1244 | { |
| 1245 | struct mlx5_cmd_msg *inb; |
| 1246 | struct mlx5_cmd_msg *outb; |
| 1247 | int pages_queue; |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1248 | gfp_t gfp; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1249 | int err; |
| 1250 | u8 status = 0; |
| 1251 | |
| 1252 | pages_queue = is_manage_pages(in); |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1253 | gfp = callback ? GFP_ATOMIC : GFP_KERNEL; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1254 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1255 | inb = alloc_msg(dev, in_size, gfp); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1256 | if (IS_ERR(inb)) { |
| 1257 | err = PTR_ERR(inb); |
| 1258 | return err; |
| 1259 | } |
| 1260 | |
| 1261 | err = mlx5_copy_to_msg(inb, in, in_size); |
| 1262 | if (err) { |
| 1263 | mlx5_core_warn(dev, "err %d\n", err); |
| 1264 | goto out_in; |
| 1265 | } |
| 1266 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1267 | outb = mlx5_alloc_cmd_msg(dev, gfp, out_size); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1268 | if (IS_ERR(outb)) { |
| 1269 | err = PTR_ERR(outb); |
| 1270 | goto out_in; |
| 1271 | } |
| 1272 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1273 | err = mlx5_cmd_invoke(dev, inb, outb, out, out_size, callback, context, |
| 1274 | pages_queue, &status); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1275 | if (err) |
| 1276 | goto out_out; |
| 1277 | |
| 1278 | mlx5_core_dbg(dev, "err %d, status %d\n", err, status); |
| 1279 | if (status) { |
| 1280 | err = status_to_err(status); |
| 1281 | goto out_out; |
| 1282 | } |
| 1283 | |
| 1284 | err = mlx5_copy_from_msg(out, outb, out_size); |
| 1285 | |
| 1286 | out_out: |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1287 | if (!callback) |
| 1288 | mlx5_free_cmd_msg(dev, outb); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1289 | |
| 1290 | out_in: |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1291 | if (!callback) |
| 1292 | free_msg(dev, inb); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1293 | return err; |
| 1294 | } |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1295 | |
| 1296 | int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, |
| 1297 | int out_size) |
| 1298 | { |
| 1299 | return cmd_exec(dev, in, in_size, out, out_size, NULL, NULL); |
| 1300 | } |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1301 | EXPORT_SYMBOL(mlx5_cmd_exec); |
| 1302 | |
Eli Cohen | 746b558 | 2013-10-23 09:53:14 +0300 | [diff] [blame^] | 1303 | int mlx5_cmd_exec_cb(struct mlx5_core_dev *dev, void *in, int in_size, |
| 1304 | void *out, int out_size, mlx5_cmd_cbk_t callback, |
| 1305 | void *context) |
| 1306 | { |
| 1307 | return cmd_exec(dev, in, in_size, out, out_size, callback, context); |
| 1308 | } |
| 1309 | EXPORT_SYMBOL(mlx5_cmd_exec_cb); |
| 1310 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1311 | static void destroy_msg_cache(struct mlx5_core_dev *dev) |
| 1312 | { |
| 1313 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1314 | struct mlx5_cmd_msg *msg; |
| 1315 | struct mlx5_cmd_msg *n; |
| 1316 | |
| 1317 | list_for_each_entry_safe(msg, n, &cmd->cache.large.head, list) { |
| 1318 | list_del(&msg->list); |
| 1319 | mlx5_free_cmd_msg(dev, msg); |
| 1320 | } |
| 1321 | |
| 1322 | list_for_each_entry_safe(msg, n, &cmd->cache.med.head, list) { |
| 1323 | list_del(&msg->list); |
| 1324 | mlx5_free_cmd_msg(dev, msg); |
| 1325 | } |
| 1326 | } |
| 1327 | |
| 1328 | static int create_msg_cache(struct mlx5_core_dev *dev) |
| 1329 | { |
| 1330 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1331 | struct mlx5_cmd_msg *msg; |
| 1332 | int err; |
| 1333 | int i; |
| 1334 | |
| 1335 | spin_lock_init(&cmd->cache.large.lock); |
| 1336 | INIT_LIST_HEAD(&cmd->cache.large.head); |
| 1337 | spin_lock_init(&cmd->cache.med.lock); |
| 1338 | INIT_LIST_HEAD(&cmd->cache.med.head); |
| 1339 | |
| 1340 | for (i = 0; i < NUM_LONG_LISTS; i++) { |
| 1341 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, LONG_LIST_SIZE); |
| 1342 | if (IS_ERR(msg)) { |
| 1343 | err = PTR_ERR(msg); |
| 1344 | goto ex_err; |
| 1345 | } |
| 1346 | msg->cache = &cmd->cache.large; |
| 1347 | list_add_tail(&msg->list, &cmd->cache.large.head); |
| 1348 | } |
| 1349 | |
| 1350 | for (i = 0; i < NUM_MED_LISTS; i++) { |
| 1351 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, MED_LIST_SIZE); |
| 1352 | if (IS_ERR(msg)) { |
| 1353 | err = PTR_ERR(msg); |
| 1354 | goto ex_err; |
| 1355 | } |
| 1356 | msg->cache = &cmd->cache.med; |
| 1357 | list_add_tail(&msg->list, &cmd->cache.med.head); |
| 1358 | } |
| 1359 | |
| 1360 | return 0; |
| 1361 | |
| 1362 | ex_err: |
| 1363 | destroy_msg_cache(dev); |
| 1364 | return err; |
| 1365 | } |
| 1366 | |
| 1367 | int mlx5_cmd_init(struct mlx5_core_dev *dev) |
| 1368 | { |
| 1369 | int size = sizeof(struct mlx5_cmd_prot_block); |
| 1370 | int align = roundup_pow_of_two(size); |
| 1371 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1372 | u32 cmd_h, cmd_l; |
| 1373 | u16 cmd_if_rev; |
| 1374 | int err; |
| 1375 | int i; |
| 1376 | |
| 1377 | cmd_if_rev = cmdif_rev(dev); |
| 1378 | if (cmd_if_rev != CMD_IF_REV) { |
| 1379 | dev_err(&dev->pdev->dev, |
| 1380 | "Driver cmdif rev(%d) differs from firmware's(%d)\n", |
| 1381 | CMD_IF_REV, cmd_if_rev); |
| 1382 | return -EINVAL; |
| 1383 | } |
| 1384 | |
| 1385 | cmd->pool = pci_pool_create("mlx5_cmd", dev->pdev, size, align, 0); |
| 1386 | if (!cmd->pool) |
| 1387 | return -ENOMEM; |
| 1388 | |
| 1389 | cmd->cmd_buf = (void *)__get_free_pages(GFP_ATOMIC, 0); |
| 1390 | if (!cmd->cmd_buf) { |
| 1391 | err = -ENOMEM; |
| 1392 | goto err_free_pool; |
| 1393 | } |
| 1394 | cmd->dma = dma_map_single(&dev->pdev->dev, cmd->cmd_buf, PAGE_SIZE, |
| 1395 | DMA_BIDIRECTIONAL); |
| 1396 | if (dma_mapping_error(&dev->pdev->dev, cmd->dma)) { |
| 1397 | err = -ENOMEM; |
| 1398 | goto err_free; |
| 1399 | } |
| 1400 | |
| 1401 | cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff; |
| 1402 | cmd->log_sz = cmd_l >> 4 & 0xf; |
| 1403 | cmd->log_stride = cmd_l & 0xf; |
| 1404 | if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) { |
| 1405 | dev_err(&dev->pdev->dev, "firmware reports too many outstanding commands %d\n", |
| 1406 | 1 << cmd->log_sz); |
| 1407 | err = -EINVAL; |
| 1408 | goto err_map; |
| 1409 | } |
| 1410 | |
| 1411 | if (cmd->log_sz + cmd->log_stride > PAGE_SHIFT) { |
| 1412 | dev_err(&dev->pdev->dev, "command queue size overflow\n"); |
| 1413 | err = -EINVAL; |
| 1414 | goto err_map; |
| 1415 | } |
| 1416 | |
Eli Cohen | c1868b8 | 2013-09-11 16:35:25 +0300 | [diff] [blame] | 1417 | cmd->checksum_disabled = 1; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1418 | cmd->max_reg_cmds = (1 << cmd->log_sz) - 1; |
| 1419 | cmd->bitmask = (1 << cmd->max_reg_cmds) - 1; |
| 1420 | |
| 1421 | cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16; |
| 1422 | if (cmd->cmdif_rev > CMD_IF_REV) { |
| 1423 | dev_err(&dev->pdev->dev, "driver does not support command interface version. driver %d, firmware %d\n", |
| 1424 | CMD_IF_REV, cmd->cmdif_rev); |
| 1425 | err = -ENOTSUPP; |
| 1426 | goto err_map; |
| 1427 | } |
| 1428 | |
| 1429 | spin_lock_init(&cmd->alloc_lock); |
| 1430 | spin_lock_init(&cmd->token_lock); |
| 1431 | for (i = 0; i < ARRAY_SIZE(cmd->stats); i++) |
| 1432 | spin_lock_init(&cmd->stats[i].lock); |
| 1433 | |
| 1434 | sema_init(&cmd->sem, cmd->max_reg_cmds); |
| 1435 | sema_init(&cmd->pages_sem, 1); |
| 1436 | |
| 1437 | cmd_h = (u32)((u64)(cmd->dma) >> 32); |
| 1438 | cmd_l = (u32)(cmd->dma); |
| 1439 | if (cmd_l & 0xfff) { |
| 1440 | dev_err(&dev->pdev->dev, "invalid command queue address\n"); |
| 1441 | err = -ENOMEM; |
| 1442 | goto err_map; |
| 1443 | } |
| 1444 | |
| 1445 | iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h); |
| 1446 | iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz); |
| 1447 | |
| 1448 | /* Make sure firmware sees the complete address before we proceed */ |
| 1449 | wmb(); |
| 1450 | |
| 1451 | mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma)); |
| 1452 | |
| 1453 | cmd->mode = CMD_MODE_POLLING; |
| 1454 | |
| 1455 | err = create_msg_cache(dev); |
| 1456 | if (err) { |
| 1457 | dev_err(&dev->pdev->dev, "failed to create command cache\n"); |
| 1458 | goto err_map; |
| 1459 | } |
| 1460 | |
| 1461 | set_wqname(dev); |
| 1462 | cmd->wq = create_singlethread_workqueue(cmd->wq_name); |
| 1463 | if (!cmd->wq) { |
| 1464 | dev_err(&dev->pdev->dev, "failed to create command workqueue\n"); |
| 1465 | err = -ENOMEM; |
| 1466 | goto err_cache; |
| 1467 | } |
| 1468 | |
| 1469 | err = create_debugfs_files(dev); |
| 1470 | if (err) { |
| 1471 | err = -ENOMEM; |
| 1472 | goto err_wq; |
| 1473 | } |
| 1474 | |
| 1475 | return 0; |
| 1476 | |
| 1477 | err_wq: |
| 1478 | destroy_workqueue(cmd->wq); |
| 1479 | |
| 1480 | err_cache: |
| 1481 | destroy_msg_cache(dev); |
| 1482 | |
| 1483 | err_map: |
| 1484 | dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, |
| 1485 | DMA_BIDIRECTIONAL); |
| 1486 | err_free: |
| 1487 | free_pages((unsigned long)cmd->cmd_buf, 0); |
| 1488 | |
| 1489 | err_free_pool: |
| 1490 | pci_pool_destroy(cmd->pool); |
| 1491 | |
| 1492 | return err; |
| 1493 | } |
| 1494 | EXPORT_SYMBOL(mlx5_cmd_init); |
| 1495 | |
| 1496 | void mlx5_cmd_cleanup(struct mlx5_core_dev *dev) |
| 1497 | { |
| 1498 | struct mlx5_cmd *cmd = &dev->cmd; |
| 1499 | |
| 1500 | clean_debug_files(dev); |
| 1501 | destroy_workqueue(cmd->wq); |
| 1502 | destroy_msg_cache(dev); |
| 1503 | dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, |
| 1504 | DMA_BIDIRECTIONAL); |
| 1505 | free_pages((unsigned long)cmd->cmd_buf, 0); |
| 1506 | pci_pool_destroy(cmd->pool); |
| 1507 | } |
| 1508 | EXPORT_SYMBOL(mlx5_cmd_cleanup); |
| 1509 | |
| 1510 | static const char *cmd_status_str(u8 status) |
| 1511 | { |
| 1512 | switch (status) { |
| 1513 | case MLX5_CMD_STAT_OK: |
| 1514 | return "OK"; |
| 1515 | case MLX5_CMD_STAT_INT_ERR: |
| 1516 | return "internal error"; |
| 1517 | case MLX5_CMD_STAT_BAD_OP_ERR: |
| 1518 | return "bad operation"; |
| 1519 | case MLX5_CMD_STAT_BAD_PARAM_ERR: |
| 1520 | return "bad parameter"; |
| 1521 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: |
| 1522 | return "bad system state"; |
| 1523 | case MLX5_CMD_STAT_BAD_RES_ERR: |
| 1524 | return "bad resource"; |
| 1525 | case MLX5_CMD_STAT_RES_BUSY: |
| 1526 | return "resource busy"; |
| 1527 | case MLX5_CMD_STAT_LIM_ERR: |
| 1528 | return "limits exceeded"; |
| 1529 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: |
| 1530 | return "bad resource state"; |
| 1531 | case MLX5_CMD_STAT_IX_ERR: |
| 1532 | return "bad index"; |
| 1533 | case MLX5_CMD_STAT_NO_RES_ERR: |
| 1534 | return "no resources"; |
| 1535 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: |
| 1536 | return "bad input length"; |
| 1537 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: |
| 1538 | return "bad output length"; |
| 1539 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: |
| 1540 | return "bad QP state"; |
| 1541 | case MLX5_CMD_STAT_BAD_PKT_ERR: |
| 1542 | return "bad packet (discarded)"; |
| 1543 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: |
| 1544 | return "bad size too many outstanding CQEs"; |
| 1545 | default: |
| 1546 | return "unknown status"; |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | int mlx5_cmd_status_to_err(struct mlx5_outbox_hdr *hdr) |
| 1551 | { |
| 1552 | if (!hdr->status) |
| 1553 | return 0; |
| 1554 | |
| 1555 | pr_warn("command failed, status %s(0x%x), syndrome 0x%x\n", |
| 1556 | cmd_status_str(hdr->status), hdr->status, |
| 1557 | be32_to_cpu(hdr->syndrome)); |
| 1558 | |
| 1559 | switch (hdr->status) { |
| 1560 | case MLX5_CMD_STAT_OK: return 0; |
| 1561 | case MLX5_CMD_STAT_INT_ERR: return -EIO; |
| 1562 | case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL; |
| 1563 | case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL; |
| 1564 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO; |
| 1565 | case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL; |
| 1566 | case MLX5_CMD_STAT_RES_BUSY: return -EBUSY; |
Eli Cohen | 9c86513 | 2013-09-11 16:35:33 +0300 | [diff] [blame] | 1567 | case MLX5_CMD_STAT_LIM_ERR: return -ENOMEM; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1568 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL; |
| 1569 | case MLX5_CMD_STAT_IX_ERR: return -EINVAL; |
| 1570 | case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN; |
| 1571 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO; |
| 1572 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO; |
| 1573 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL; |
| 1574 | case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL; |
| 1575 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL; |
| 1576 | default: return -EIO; |
| 1577 | } |
| 1578 | } |