Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Linux MegaRAID device driver |
| 4 | * |
| 5 | * Copyright (c) 2003-2004 LSI Logic Corporation. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FILE : megaraid_mm.c |
Ju, Seokmann | 0b4972d | 2006-07-25 08:45:06 -0600 | [diff] [blame] | 13 | * Version : v2.20.2.7 (Jul 16 2006) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * |
| 15 | * Common management module |
| 16 | */ |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 17 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "megaraid_mm.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | |
| 21 | // Entry points for char node driver |
| 22 | static int mraid_mm_open(struct inode *, struct file *); |
| 23 | static int mraid_mm_ioctl(struct inode *, struct file *, uint, unsigned long); |
| 24 | |
| 25 | |
| 26 | // routines to convert to and from the old the format |
| 27 | static int mimd_to_kioc(mimd_t __user *, mraid_mmadp_t *, uioc_t *); |
| 28 | static int kioc_to_mimd(uioc_t *, mimd_t __user *); |
| 29 | |
| 30 | |
| 31 | // Helper functions |
| 32 | static int handle_drvrcmd(void __user *, uint8_t, int *); |
| 33 | static int lld_ioctl(mraid_mmadp_t *, uioc_t *); |
| 34 | static void ioctl_done(uioc_t *); |
| 35 | static void lld_timedout(unsigned long); |
| 36 | static void hinfo_to_cinfo(mraid_hba_info_t *, mcontroller_t *); |
| 37 | static mraid_mmadp_t *mraid_mm_get_adapter(mimd_t __user *, int *); |
| 38 | static uioc_t *mraid_mm_alloc_kioc(mraid_mmadp_t *); |
| 39 | static void mraid_mm_dealloc_kioc(mraid_mmadp_t *, uioc_t *); |
| 40 | static int mraid_mm_attach_buf(mraid_mmadp_t *, uioc_t *, int); |
| 41 | static int mraid_mm_setup_dma_pools(mraid_mmadp_t *); |
| 42 | static void mraid_mm_free_adp_resources(mraid_mmadp_t *); |
| 43 | static void mraid_mm_teardown_dma_pools(mraid_mmadp_t *); |
| 44 | |
| 45 | #ifdef CONFIG_COMPAT |
| 46 | static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long); |
| 47 | #endif |
| 48 | |
| 49 | MODULE_AUTHOR("LSI Logic Corporation"); |
| 50 | MODULE_DESCRIPTION("LSI Logic Management Module"); |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | MODULE_VERSION(LSI_COMMON_MOD_VERSION); |
| 53 | |
| 54 | static int dbglevel = CL_ANN; |
| 55 | module_param_named(dlevel, dbglevel, int, 0); |
| 56 | MODULE_PARM_DESC(dlevel, "Debug level (default=0)"); |
| 57 | |
| 58 | EXPORT_SYMBOL(mraid_mm_register_adp); |
| 59 | EXPORT_SYMBOL(mraid_mm_unregister_adp); |
| 60 | EXPORT_SYMBOL(mraid_mm_adapter_app_handle); |
| 61 | |
David Milburn | 2a4aa2c | 2007-04-19 12:10:24 -0500 | [diff] [blame] | 62 | static uint32_t drvr_ver = 0x02200207; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | static int adapters_count_g; |
| 65 | static struct list_head adapters_list_g; |
| 66 | |
| 67 | static wait_queue_head_t wait_q; |
| 68 | |
Arjan van de Ven | 00977a5 | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 69 | static const struct file_operations lsi_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | .open = mraid_mm_open, |
| 71 | .ioctl = mraid_mm_ioctl, |
| 72 | #ifdef CONFIG_COMPAT |
| 73 | .compat_ioctl = mraid_mm_compat_ioctl, |
| 74 | #endif |
| 75 | .owner = THIS_MODULE, |
| 76 | }; |
| 77 | |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame^] | 78 | static struct miscdevice megaraid_mm_dev = { |
| 79 | .minor = MISC_DYNAMIC_MINOR, |
| 80 | .name = "megadev0", |
| 81 | .fops = &lsi_fops, |
| 82 | }; |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | /** |
| 85 | * mraid_mm_open - open routine for char node interface |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 86 | * @inode : unused |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | * @filep : unused |
| 88 | * |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 89 | * Allow ioctl operations by apps only if they have superuser privilege. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | */ |
| 91 | static int |
| 92 | mraid_mm_open(struct inode *inode, struct file *filep) |
| 93 | { |
| 94 | /* |
| 95 | * Only allow superuser to access private ioctl interface |
| 96 | */ |
| 97 | if (!capable(CAP_SYS_ADMIN)) return (-EACCES); |
| 98 | |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * mraid_mm_ioctl - module entry-point for ioctls |
| 104 | * @inode : inode (ignored) |
| 105 | * @filep : file operations pointer (ignored) |
| 106 | * @cmd : ioctl command |
| 107 | * @arg : user ioctl packet |
| 108 | */ |
| 109 | static int |
| 110 | mraid_mm_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, |
| 111 | unsigned long arg) |
| 112 | { |
| 113 | uioc_t *kioc; |
| 114 | char signature[EXT_IOCTL_SIGN_SZ] = {0}; |
| 115 | int rval; |
| 116 | mraid_mmadp_t *adp; |
| 117 | uint8_t old_ioctl; |
| 118 | int drvrcmd_rval; |
| 119 | void __user *argp = (void __user *)arg; |
| 120 | |
| 121 | /* |
| 122 | * Make sure only USCSICMD are issued through this interface. |
| 123 | * MIMD application would still fire different command. |
| 124 | */ |
| 125 | |
| 126 | if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) { |
| 127 | return (-EINVAL); |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | * Look for signature to see if this is the new or old ioctl format. |
| 132 | */ |
| 133 | if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) { |
| 134 | con_log(CL_ANN, (KERN_WARNING |
| 135 | "megaraid cmm: copy from usr addr failed\n")); |
| 136 | return (-EFAULT); |
| 137 | } |
| 138 | |
| 139 | if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0) |
| 140 | old_ioctl = 0; |
| 141 | else |
| 142 | old_ioctl = 1; |
| 143 | |
| 144 | /* |
| 145 | * At present, we don't support the new ioctl packet |
| 146 | */ |
| 147 | if (!old_ioctl ) |
| 148 | return (-EINVAL); |
| 149 | |
| 150 | /* |
| 151 | * If it is a driver ioctl (as opposed to fw ioctls), then we can |
| 152 | * handle the command locally. rval > 0 means it is not a drvr cmd |
| 153 | */ |
| 154 | rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval); |
| 155 | |
| 156 | if (rval < 0) |
| 157 | return rval; |
| 158 | else if (rval == 0) |
| 159 | return drvrcmd_rval; |
| 160 | |
| 161 | rval = 0; |
| 162 | if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) { |
| 163 | return rval; |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * Check if adapter can accept ioctl. We may have marked it offline |
| 168 | * if any previous kioc had timedout on this controller. |
| 169 | */ |
| 170 | if (!adp->quiescent) { |
| 171 | con_log(CL_ANN, (KERN_WARNING |
| 172 | "megaraid cmm: controller cannot accept cmds due to " |
| 173 | "earlier errors\n" )); |
| 174 | return -EFAULT; |
| 175 | } |
| 176 | |
| 177 | /* |
| 178 | * The following call will block till a kioc is available |
| 179 | */ |
| 180 | kioc = mraid_mm_alloc_kioc(adp); |
| 181 | |
| 182 | /* |
| 183 | * User sent the old mimd_t ioctl packet. Convert it to uioc_t. |
| 184 | */ |
| 185 | if ((rval = mimd_to_kioc(argp, adp, kioc))) { |
| 186 | mraid_mm_dealloc_kioc(adp, kioc); |
| 187 | return rval; |
| 188 | } |
| 189 | |
| 190 | kioc->done = ioctl_done; |
| 191 | |
| 192 | /* |
| 193 | * Issue the IOCTL to the low level driver. After the IOCTL completes |
| 194 | * release the kioc if and only if it was _not_ timedout. If it was |
| 195 | * timedout, that means that resources are still with low level driver. |
| 196 | */ |
| 197 | if ((rval = lld_ioctl(adp, kioc))) { |
| 198 | |
| 199 | if (!kioc->timedout) |
| 200 | mraid_mm_dealloc_kioc(adp, kioc); |
| 201 | |
| 202 | return rval; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Convert the kioc back to user space |
| 207 | */ |
| 208 | rval = kioc_to_mimd(kioc, argp); |
| 209 | |
| 210 | /* |
| 211 | * Return the kioc to free pool |
| 212 | */ |
| 213 | mraid_mm_dealloc_kioc(adp, kioc); |
| 214 | |
| 215 | return rval; |
| 216 | } |
| 217 | |
| 218 | |
| 219 | /** |
| 220 | * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet |
| 221 | * @umimd : User space mimd_t ioctl packet |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 222 | * @rval : returned success/error status |
| 223 | * |
| 224 | * The function return value is a pointer to the located @adapter. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | */ |
| 226 | static mraid_mmadp_t * |
| 227 | mraid_mm_get_adapter(mimd_t __user *umimd, int *rval) |
| 228 | { |
| 229 | mraid_mmadp_t *adapter; |
| 230 | mimd_t mimd; |
| 231 | uint32_t adapno; |
| 232 | int iterator; |
| 233 | |
| 234 | |
| 235 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) { |
| 236 | *rval = -EFAULT; |
| 237 | return NULL; |
| 238 | } |
| 239 | |
| 240 | adapno = GETADAP(mimd.ui.fcs.adapno); |
| 241 | |
| 242 | if (adapno >= adapters_count_g) { |
| 243 | *rval = -ENODEV; |
| 244 | return NULL; |
| 245 | } |
| 246 | |
| 247 | adapter = NULL; |
| 248 | iterator = 0; |
| 249 | |
| 250 | list_for_each_entry(adapter, &adapters_list_g, list) { |
| 251 | if (iterator++ == adapno) break; |
| 252 | } |
| 253 | |
| 254 | if (!adapter) { |
| 255 | *rval = -ENODEV; |
| 256 | return NULL; |
| 257 | } |
| 258 | |
| 259 | return adapter; |
| 260 | } |
| 261 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 262 | /** |
| 263 | * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | * @arg : packet sent by the user app |
| 265 | * @old_ioctl : mimd if 1; uioc otherwise |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 266 | * @rval : pointer for command's returned value (not function status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | */ |
| 268 | static int |
| 269 | handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval) |
| 270 | { |
| 271 | mimd_t __user *umimd; |
| 272 | mimd_t kmimd; |
| 273 | uint8_t opcode; |
| 274 | uint8_t subopcode; |
| 275 | |
| 276 | if (old_ioctl) |
| 277 | goto old_packet; |
| 278 | else |
| 279 | goto new_packet; |
| 280 | |
| 281 | new_packet: |
| 282 | return (-ENOTSUPP); |
| 283 | |
| 284 | old_packet: |
| 285 | *rval = 0; |
| 286 | umimd = arg; |
| 287 | |
| 288 | if (copy_from_user(&kmimd, umimd, sizeof(mimd_t))) |
| 289 | return (-EFAULT); |
| 290 | |
| 291 | opcode = kmimd.ui.fcs.opcode; |
| 292 | subopcode = kmimd.ui.fcs.subopcode; |
| 293 | |
| 294 | /* |
| 295 | * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or |
| 296 | * GET_NUMADP, then we can handle. Otherwise we should return 1 to |
| 297 | * indicate that we cannot handle this. |
| 298 | */ |
| 299 | if (opcode != 0x82) |
| 300 | return 1; |
| 301 | |
| 302 | switch (subopcode) { |
| 303 | |
| 304 | case MEGAIOC_QDRVRVER: |
| 305 | |
| 306 | if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t))) |
| 307 | return (-EFAULT); |
| 308 | |
| 309 | return 0; |
| 310 | |
| 311 | case MEGAIOC_QNADAP: |
| 312 | |
| 313 | *rval = adapters_count_g; |
| 314 | |
| 315 | if (copy_to_user(kmimd.data, &adapters_count_g, |
| 316 | sizeof(uint32_t))) |
| 317 | return (-EFAULT); |
| 318 | |
| 319 | return 0; |
| 320 | |
| 321 | default: |
| 322 | /* cannot handle */ |
| 323 | return 1; |
| 324 | } |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | |
| 330 | /** |
| 331 | * mimd_to_kioc - Converter from old to new ioctl format |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | * @umimd : user space old MIMD IOCTL |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 333 | * @adp : adapter softstate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | * @kioc : kernel space new format IOCTL |
| 335 | * |
| 336 | * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The |
| 337 | * new packet is in kernel space so that driver can perform operations on it |
| 338 | * freely. |
| 339 | */ |
| 340 | |
| 341 | static int |
| 342 | mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) |
| 343 | { |
| 344 | mbox64_t *mbox64; |
| 345 | mbox_t *mbox; |
| 346 | mraid_passthru_t *pthru32; |
| 347 | uint32_t adapno; |
| 348 | uint8_t opcode; |
| 349 | uint8_t subopcode; |
| 350 | mimd_t mimd; |
| 351 | |
| 352 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) |
| 353 | return (-EFAULT); |
| 354 | |
| 355 | /* |
| 356 | * Applications are not allowed to send extd pthru |
| 357 | */ |
| 358 | if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) || |
| 359 | (mimd.mbox[0] == MBOXCMD_EXTPTHRU)) |
| 360 | return (-EINVAL); |
| 361 | |
| 362 | opcode = mimd.ui.fcs.opcode; |
| 363 | subopcode = mimd.ui.fcs.subopcode; |
| 364 | adapno = GETADAP(mimd.ui.fcs.adapno); |
| 365 | |
| 366 | if (adapno >= adapters_count_g) |
| 367 | return (-ENODEV); |
| 368 | |
| 369 | kioc->adapno = adapno; |
| 370 | kioc->mb_type = MBOX_LEGACY; |
| 371 | kioc->app_type = APPTYPE_MIMD; |
| 372 | |
| 373 | switch (opcode) { |
| 374 | |
| 375 | case 0x82: |
| 376 | |
| 377 | if (subopcode == MEGAIOC_QADAPINFO) { |
| 378 | |
| 379 | kioc->opcode = GET_ADAP_INFO; |
| 380 | kioc->data_dir = UIOC_RD; |
| 381 | kioc->xferlen = sizeof(mraid_hba_info_t); |
| 382 | |
| 383 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| 384 | return (-ENOMEM); |
| 385 | } |
| 386 | else { |
| 387 | con_log(CL_ANN, (KERN_WARNING |
| 388 | "megaraid cmm: Invalid subop\n")); |
| 389 | return (-EINVAL); |
| 390 | } |
| 391 | |
| 392 | break; |
| 393 | |
| 394 | case 0x81: |
| 395 | |
| 396 | kioc->opcode = MBOX_CMD; |
| 397 | kioc->xferlen = mimd.ui.fcs.length; |
| 398 | kioc->user_data_len = kioc->xferlen; |
| 399 | kioc->user_data = mimd.ui.fcs.buffer; |
| 400 | |
| 401 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| 402 | return (-ENOMEM); |
| 403 | |
| 404 | if (mimd.outlen) kioc->data_dir = UIOC_RD; |
| 405 | if (mimd.inlen) kioc->data_dir |= UIOC_WR; |
| 406 | |
| 407 | break; |
| 408 | |
| 409 | case 0x80: |
| 410 | |
| 411 | kioc->opcode = MBOX_CMD; |
| 412 | kioc->xferlen = (mimd.outlen > mimd.inlen) ? |
| 413 | mimd.outlen : mimd.inlen; |
| 414 | kioc->user_data_len = kioc->xferlen; |
| 415 | kioc->user_data = mimd.data; |
| 416 | |
| 417 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| 418 | return (-ENOMEM); |
| 419 | |
| 420 | if (mimd.outlen) kioc->data_dir = UIOC_RD; |
| 421 | if (mimd.inlen) kioc->data_dir |= UIOC_WR; |
| 422 | |
| 423 | break; |
| 424 | |
| 425 | default: |
| 426 | return (-EINVAL); |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * If driver command, nothing else to do |
| 431 | */ |
| 432 | if (opcode == 0x82) |
| 433 | return 0; |
| 434 | |
| 435 | /* |
| 436 | * This is a mailbox cmd; copy the mailbox from mimd |
| 437 | */ |
| 438 | mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf); |
| 439 | mbox = &mbox64->mbox32; |
| 440 | memcpy(mbox, mimd.mbox, 14); |
| 441 | |
| 442 | if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD |
| 443 | |
| 444 | mbox->xferaddr = (uint32_t)kioc->buf_paddr; |
| 445 | |
| 446 | if (kioc->data_dir & UIOC_WR) { |
| 447 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
| 448 | kioc->xferlen)) { |
| 449 | return (-EFAULT); |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | return 0; |
| 454 | } |
| 455 | |
| 456 | /* |
| 457 | * This is a regular 32-bit pthru cmd; mbox points to pthru struct. |
| 458 | * Just like in above case, the beginning for memblk is treated as |
| 459 | * a mailbox. The passthru will begin at next 1K boundary. And the |
| 460 | * data will start 1K after that. |
| 461 | */ |
| 462 | pthru32 = kioc->pthru32; |
| 463 | kioc->user_pthru = &umimd->pthru; |
| 464 | mbox->xferaddr = (uint32_t)kioc->pthru32_h; |
| 465 | |
| 466 | if (copy_from_user(pthru32, kioc->user_pthru, |
| 467 | sizeof(mraid_passthru_t))) { |
| 468 | return (-EFAULT); |
| 469 | } |
| 470 | |
| 471 | pthru32->dataxferaddr = kioc->buf_paddr; |
| 472 | if (kioc->data_dir & UIOC_WR) { |
| 473 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
| 474 | pthru32->dataxferlen)) { |
| 475 | return (-EFAULT); |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | /** |
| 483 | * mraid_mm_attch_buf - Attach a free dma buffer for required size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | * @adp : Adapter softstate |
| 485 | * @kioc : kioc that the buffer needs to be attached to |
| 486 | * @xferlen : required length for buffer |
| 487 | * |
| 488 | * First we search for a pool with smallest buffer that is >= @xferlen. If |
| 489 | * that pool has no free buffer, we will try for the next bigger size. If none |
| 490 | * is available, we will try to allocate the smallest buffer that is >= |
| 491 | * @xferlen and attach it the pool. |
| 492 | */ |
| 493 | static int |
| 494 | mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen) |
| 495 | { |
| 496 | mm_dmapool_t *pool; |
| 497 | int right_pool = -1; |
| 498 | unsigned long flags; |
| 499 | int i; |
| 500 | |
| 501 | kioc->pool_index = -1; |
| 502 | kioc->buf_vaddr = NULL; |
| 503 | kioc->buf_paddr = 0; |
| 504 | kioc->free_buf = 0; |
| 505 | |
| 506 | /* |
| 507 | * We need xferlen amount of memory. See if we can get it from our |
| 508 | * dma pools. If we don't get exact size, we will try bigger buffer |
| 509 | */ |
| 510 | |
| 511 | for (i = 0; i < MAX_DMA_POOLS; i++) { |
| 512 | |
| 513 | pool = &adp->dma_pool_list[i]; |
| 514 | |
| 515 | if (xferlen > pool->buf_size) |
| 516 | continue; |
| 517 | |
| 518 | if (right_pool == -1) |
| 519 | right_pool = i; |
| 520 | |
| 521 | spin_lock_irqsave(&pool->lock, flags); |
| 522 | |
| 523 | if (!pool->in_use) { |
| 524 | |
| 525 | pool->in_use = 1; |
| 526 | kioc->pool_index = i; |
| 527 | kioc->buf_vaddr = pool->vaddr; |
| 528 | kioc->buf_paddr = pool->paddr; |
| 529 | |
| 530 | spin_unlock_irqrestore(&pool->lock, flags); |
| 531 | return 0; |
| 532 | } |
| 533 | else { |
| 534 | spin_unlock_irqrestore(&pool->lock, flags); |
| 535 | continue; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /* |
| 540 | * If xferlen doesn't match any of our pools, return error |
| 541 | */ |
| 542 | if (right_pool == -1) |
| 543 | return -EINVAL; |
| 544 | |
| 545 | /* |
| 546 | * We did not get any buffer from the preallocated pool. Let us try |
| 547 | * to allocate one new buffer. NOTE: This is a blocking call. |
| 548 | */ |
| 549 | pool = &adp->dma_pool_list[right_pool]; |
| 550 | |
| 551 | spin_lock_irqsave(&pool->lock, flags); |
| 552 | |
| 553 | kioc->pool_index = right_pool; |
| 554 | kioc->free_buf = 1; |
| 555 | kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, |
| 556 | &kioc->buf_paddr); |
| 557 | spin_unlock_irqrestore(&pool->lock, flags); |
| 558 | |
| 559 | if (!kioc->buf_vaddr) |
| 560 | return -ENOMEM; |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | /** |
| 566 | * mraid_mm_alloc_kioc - Returns a uioc_t from free list |
| 567 | * @adp : Adapter softstate for this module |
| 568 | * |
| 569 | * The kioc_semaphore is initialized with number of kioc nodes in the |
| 570 | * free kioc pool. If the kioc pool is empty, this function blocks till |
| 571 | * a kioc becomes free. |
| 572 | */ |
| 573 | static uioc_t * |
| 574 | mraid_mm_alloc_kioc(mraid_mmadp_t *adp) |
| 575 | { |
| 576 | uioc_t *kioc; |
| 577 | struct list_head* head; |
| 578 | unsigned long flags; |
| 579 | |
| 580 | down(&adp->kioc_semaphore); |
| 581 | |
| 582 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); |
| 583 | |
| 584 | head = &adp->kioc_pool; |
| 585 | |
| 586 | if (list_empty(head)) { |
| 587 | up(&adp->kioc_semaphore); |
| 588 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| 589 | |
| 590 | con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n")); |
| 591 | return NULL; |
| 592 | } |
| 593 | |
| 594 | kioc = list_entry(head->next, uioc_t, list); |
| 595 | list_del_init(&kioc->list); |
| 596 | |
| 597 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| 598 | |
| 599 | memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t)); |
| 600 | memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t)); |
| 601 | |
| 602 | kioc->buf_vaddr = NULL; |
| 603 | kioc->buf_paddr = 0; |
| 604 | kioc->pool_index =-1; |
| 605 | kioc->free_buf = 0; |
| 606 | kioc->user_data = NULL; |
| 607 | kioc->user_data_len = 0; |
| 608 | kioc->user_pthru = NULL; |
| 609 | kioc->timedout = 0; |
| 610 | |
| 611 | return kioc; |
| 612 | } |
| 613 | |
| 614 | /** |
| 615 | * mraid_mm_dealloc_kioc - Return kioc to free pool |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | * @adp : Adapter softstate |
| 617 | * @kioc : uioc_t node to be returned to free pool |
| 618 | */ |
| 619 | static void |
| 620 | mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc) |
| 621 | { |
| 622 | mm_dmapool_t *pool; |
| 623 | unsigned long flags; |
| 624 | |
| 625 | if (kioc->pool_index != -1) { |
| 626 | pool = &adp->dma_pool_list[kioc->pool_index]; |
| 627 | |
| 628 | /* This routine may be called in non-isr context also */ |
| 629 | spin_lock_irqsave(&pool->lock, flags); |
| 630 | |
| 631 | /* |
| 632 | * While attaching the dma buffer, if we didn't get the |
| 633 | * required buffer from the pool, we would have allocated |
| 634 | * it at the run time and set the free_buf flag. We must |
| 635 | * free that buffer. Otherwise, just mark that the buffer is |
| 636 | * not in use |
| 637 | */ |
| 638 | if (kioc->free_buf == 1) |
| 639 | pci_pool_free(pool->handle, kioc->buf_vaddr, |
| 640 | kioc->buf_paddr); |
| 641 | else |
| 642 | pool->in_use = 0; |
| 643 | |
| 644 | spin_unlock_irqrestore(&pool->lock, flags); |
| 645 | } |
| 646 | |
| 647 | /* Return the kioc to the free pool */ |
| 648 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); |
| 649 | list_add(&kioc->list, &adp->kioc_pool); |
| 650 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| 651 | |
| 652 | /* increment the free kioc count */ |
| 653 | up(&adp->kioc_semaphore); |
| 654 | |
| 655 | return; |
| 656 | } |
| 657 | |
| 658 | /** |
| 659 | * lld_ioctl - Routine to issue ioctl to low level drvr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | * @adp : The adapter handle |
| 661 | * @kioc : The ioctl packet with kernel addresses |
| 662 | */ |
| 663 | static int |
| 664 | lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc) |
| 665 | { |
| 666 | int rval; |
| 667 | struct timer_list timer; |
| 668 | struct timer_list *tp = NULL; |
| 669 | |
| 670 | kioc->status = -ENODATA; |
| 671 | rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE); |
| 672 | |
| 673 | if (rval) return rval; |
| 674 | |
| 675 | /* |
| 676 | * Start the timer |
| 677 | */ |
| 678 | if (adp->timeout > 0) { |
| 679 | tp = &timer; |
| 680 | init_timer(tp); |
| 681 | |
| 682 | tp->function = lld_timedout; |
| 683 | tp->data = (unsigned long)kioc; |
| 684 | tp->expires = jiffies + adp->timeout * HZ; |
| 685 | |
| 686 | add_timer(tp); |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * Wait till the low level driver completes the ioctl. After this |
| 691 | * call, the ioctl either completed successfully or timedout. |
| 692 | */ |
| 693 | wait_event(wait_q, (kioc->status != -ENODATA)); |
| 694 | if (tp) { |
| 695 | del_timer_sync(tp); |
| 696 | } |
| 697 | |
| 698 | /* |
| 699 | * If the command had timedout, we mark the controller offline |
| 700 | * before returning |
| 701 | */ |
| 702 | if (kioc->timedout) { |
| 703 | adp->quiescent = 0; |
| 704 | } |
| 705 | |
| 706 | return kioc->status; |
| 707 | } |
| 708 | |
| 709 | |
| 710 | /** |
| 711 | * ioctl_done - callback from the low level driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | * @kioc : completed ioctl packet |
| 713 | */ |
| 714 | static void |
| 715 | ioctl_done(uioc_t *kioc) |
| 716 | { |
| 717 | uint32_t adapno; |
| 718 | int iterator; |
| 719 | mraid_mmadp_t* adapter; |
| 720 | |
| 721 | /* |
| 722 | * When the kioc returns from driver, make sure it still doesn't |
| 723 | * have ENODATA in status. Otherwise, driver will hang on wait_event |
| 724 | * forever |
| 725 | */ |
| 726 | if (kioc->status == -ENODATA) { |
| 727 | con_log(CL_ANN, (KERN_WARNING |
| 728 | "megaraid cmm: lld didn't change status!\n")); |
| 729 | |
| 730 | kioc->status = -EINVAL; |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Check if this kioc was timedout before. If so, nobody is waiting |
| 735 | * on this kioc. We don't have to wake up anybody. Instead, we just |
| 736 | * have to free the kioc |
| 737 | */ |
| 738 | if (kioc->timedout) { |
| 739 | iterator = 0; |
| 740 | adapter = NULL; |
| 741 | adapno = kioc->adapno; |
| 742 | |
| 743 | con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed " |
| 744 | "ioctl that was timedout before\n")); |
| 745 | |
| 746 | list_for_each_entry(adapter, &adapters_list_g, list) { |
| 747 | if (iterator++ == adapno) break; |
| 748 | } |
| 749 | |
| 750 | kioc->timedout = 0; |
| 751 | |
| 752 | if (adapter) { |
| 753 | mraid_mm_dealloc_kioc( adapter, kioc ); |
| 754 | } |
| 755 | } |
| 756 | else { |
| 757 | wake_up(&wait_q); |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 762 | /** |
| 763 | * lld_timedout - callback from the expired timer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | * @ptr : ioctl packet that timed out |
| 765 | */ |
| 766 | static void |
| 767 | lld_timedout(unsigned long ptr) |
| 768 | { |
| 769 | uioc_t *kioc = (uioc_t *)ptr; |
| 770 | |
| 771 | kioc->status = -ETIME; |
| 772 | kioc->timedout = 1; |
| 773 | |
| 774 | con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n")); |
| 775 | |
| 776 | wake_up(&wait_q); |
| 777 | } |
| 778 | |
| 779 | |
| 780 | /** |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 781 | * kioc_to_mimd - Converter from new back to old format |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | * @kioc : Kernel space IOCTL packet (successfully issued) |
| 783 | * @mimd : User space MIMD packet |
| 784 | */ |
| 785 | static int |
| 786 | kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd) |
| 787 | { |
| 788 | mimd_t kmimd; |
| 789 | uint8_t opcode; |
| 790 | uint8_t subopcode; |
| 791 | |
| 792 | mbox64_t *mbox64; |
| 793 | mraid_passthru_t __user *upthru32; |
| 794 | mraid_passthru_t *kpthru32; |
| 795 | mcontroller_t cinfo; |
| 796 | mraid_hba_info_t *hinfo; |
| 797 | |
| 798 | |
| 799 | if (copy_from_user(&kmimd, mimd, sizeof(mimd_t))) |
| 800 | return (-EFAULT); |
| 801 | |
| 802 | opcode = kmimd.ui.fcs.opcode; |
| 803 | subopcode = kmimd.ui.fcs.subopcode; |
| 804 | |
| 805 | if (opcode == 0x82) { |
| 806 | switch (subopcode) { |
| 807 | |
| 808 | case MEGAIOC_QADAPINFO: |
| 809 | |
| 810 | hinfo = (mraid_hba_info_t *)(unsigned long) |
| 811 | kioc->buf_vaddr; |
| 812 | |
| 813 | hinfo_to_cinfo(hinfo, &cinfo); |
| 814 | |
| 815 | if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo))) |
| 816 | return (-EFAULT); |
| 817 | |
| 818 | return 0; |
| 819 | |
| 820 | default: |
| 821 | return (-EINVAL); |
| 822 | } |
| 823 | |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; |
| 828 | |
| 829 | if (kioc->user_pthru) { |
| 830 | |
| 831 | upthru32 = kioc->user_pthru; |
| 832 | kpthru32 = kioc->pthru32; |
| 833 | |
| 834 | if (copy_to_user(&upthru32->scsistatus, |
| 835 | &kpthru32->scsistatus, |
| 836 | sizeof(uint8_t))) { |
| 837 | return (-EFAULT); |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | if (kioc->user_data) { |
| 842 | if (copy_to_user(kioc->user_data, kioc->buf_vaddr, |
| 843 | kioc->user_data_len)) { |
| 844 | return (-EFAULT); |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | if (copy_to_user(&mimd->mbox[17], |
| 849 | &mbox64->mbox32.status, sizeof(uint8_t))) { |
| 850 | return (-EFAULT); |
| 851 | } |
| 852 | |
| 853 | return 0; |
| 854 | } |
| 855 | |
| 856 | |
| 857 | /** |
| 858 | * hinfo_to_cinfo - Convert new format hba info into old format |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | * @hinfo : New format, more comprehensive adapter info |
| 860 | * @cinfo : Old format adapter info to support mimd_t apps |
| 861 | */ |
| 862 | static void |
| 863 | hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo) |
| 864 | { |
| 865 | if (!hinfo || !cinfo) |
| 866 | return; |
| 867 | |
| 868 | cinfo->base = hinfo->baseport; |
| 869 | cinfo->irq = hinfo->irq; |
| 870 | cinfo->numldrv = hinfo->num_ldrv; |
| 871 | cinfo->pcibus = hinfo->pci_bus; |
| 872 | cinfo->pcidev = hinfo->pci_slot; |
| 873 | cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn); |
| 874 | cinfo->pciid = hinfo->pci_device_id; |
| 875 | cinfo->pcivendor = hinfo->pci_vendor_id; |
| 876 | cinfo->pcislot = hinfo->pci_slot; |
| 877 | cinfo->uid = hinfo->unique_id; |
| 878 | } |
| 879 | |
| 880 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 881 | /** |
| 882 | * mraid_mm_register_adp - Registration routine for low level drivers |
| 883 | * @lld_adp : Adapter objejct |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | */ |
| 885 | int |
| 886 | mraid_mm_register_adp(mraid_mmadp_t *lld_adp) |
| 887 | { |
| 888 | mraid_mmadp_t *adapter; |
| 889 | mbox64_t *mbox_list; |
| 890 | uioc_t *kioc; |
| 891 | uint32_t rval; |
| 892 | int i; |
| 893 | |
| 894 | |
| 895 | if (lld_adp->drvr_type != DRVRTYPE_MBOX) |
| 896 | return (-EINVAL); |
| 897 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 898 | adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
Adrian Bunk | 5236467 | 2006-03-10 23:24:55 +0100 | [diff] [blame] | 900 | if (!adapter) |
| 901 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | adapter->unique_id = lld_adp->unique_id; |
| 905 | adapter->drvr_type = lld_adp->drvr_type; |
| 906 | adapter->drvr_data = lld_adp->drvr_data; |
| 907 | adapter->pdev = lld_adp->pdev; |
| 908 | adapter->issue_uioc = lld_adp->issue_uioc; |
| 909 | adapter->timeout = lld_adp->timeout; |
| 910 | adapter->max_kioc = lld_adp->max_kioc; |
| 911 | adapter->quiescent = 1; |
| 912 | |
| 913 | /* |
| 914 | * Allocate single blocks of memory for all required kiocs, |
| 915 | * mailboxes and passthru structures. |
| 916 | */ |
| 917 | adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc, |
| 918 | GFP_KERNEL); |
| 919 | adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc, |
| 920 | GFP_KERNEL); |
| 921 | adapter->pthru_dma_pool = pci_pool_create("megaraid mm pthru pool", |
| 922 | adapter->pdev, |
| 923 | sizeof(mraid_passthru_t), |
| 924 | 16, 0); |
| 925 | |
| 926 | if (!adapter->kioc_list || !adapter->mbox_list || |
| 927 | !adapter->pthru_dma_pool) { |
| 928 | |
| 929 | con_log(CL_ANN, (KERN_WARNING |
| 930 | "megaraid cmm: out of memory, %s %d\n", __FUNCTION__, |
| 931 | __LINE__)); |
| 932 | |
| 933 | rval = (-ENOMEM); |
| 934 | |
| 935 | goto memalloc_error; |
| 936 | } |
| 937 | |
| 938 | /* |
| 939 | * Slice kioc_list and make a kioc_pool with the individiual kiocs |
| 940 | */ |
| 941 | INIT_LIST_HEAD(&adapter->kioc_pool); |
| 942 | spin_lock_init(&adapter->kioc_pool_lock); |
| 943 | sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc); |
| 944 | |
| 945 | mbox_list = (mbox64_t *)adapter->mbox_list; |
| 946 | |
| 947 | for (i = 0; i < lld_adp->max_kioc; i++) { |
| 948 | |
| 949 | kioc = adapter->kioc_list + i; |
| 950 | kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i); |
| 951 | kioc->pthru32 = pci_pool_alloc(adapter->pthru_dma_pool, |
| 952 | GFP_KERNEL, &kioc->pthru32_h); |
| 953 | |
| 954 | if (!kioc->pthru32) { |
| 955 | |
| 956 | con_log(CL_ANN, (KERN_WARNING |
| 957 | "megaraid cmm: out of memory, %s %d\n", |
| 958 | __FUNCTION__, __LINE__)); |
| 959 | |
| 960 | rval = (-ENOMEM); |
| 961 | |
| 962 | goto pthru_dma_pool_error; |
| 963 | } |
| 964 | |
| 965 | list_add_tail(&kioc->list, &adapter->kioc_pool); |
| 966 | } |
| 967 | |
| 968 | // Setup the dma pools for data buffers |
| 969 | if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) { |
| 970 | goto dma_pool_error; |
| 971 | } |
| 972 | |
| 973 | list_add_tail(&adapter->list, &adapters_list_g); |
| 974 | |
| 975 | adapters_count_g++; |
| 976 | |
| 977 | return 0; |
| 978 | |
| 979 | dma_pool_error: |
| 980 | /* Do nothing */ |
| 981 | |
| 982 | pthru_dma_pool_error: |
| 983 | |
| 984 | for (i = 0; i < lld_adp->max_kioc; i++) { |
| 985 | kioc = adapter->kioc_list + i; |
| 986 | if (kioc->pthru32) { |
| 987 | pci_pool_free(adapter->pthru_dma_pool, kioc->pthru32, |
| 988 | kioc->pthru32_h); |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | memalloc_error: |
| 993 | |
Jesper Juhl | c9475cb | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 994 | kfree(adapter->kioc_list); |
| 995 | kfree(adapter->mbox_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
| 997 | if (adapter->pthru_dma_pool) |
| 998 | pci_pool_destroy(adapter->pthru_dma_pool); |
| 999 | |
Jesper Juhl | c9475cb | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 1000 | kfree(adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | |
| 1002 | return rval; |
| 1003 | } |
| 1004 | |
| 1005 | |
| 1006 | /** |
| 1007 | * mraid_mm_adapter_app_handle - return the application handle for this adapter |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1008 | * @unique_id : adapter unique identifier |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | * |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1010 | * For the given driver data, locate the adapter in our global list and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | * return the corresponding handle, which is also used by applications to |
| 1012 | * uniquely identify an adapter. |
| 1013 | * |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1014 | * Return adapter handle if found in the list. |
| 1015 | * Return 0 if adapter could not be located, should never happen though. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | */ |
| 1017 | uint32_t |
| 1018 | mraid_mm_adapter_app_handle(uint32_t unique_id) |
| 1019 | { |
| 1020 | mraid_mmadp_t *adapter; |
| 1021 | mraid_mmadp_t *tmp; |
| 1022 | int index = 0; |
| 1023 | |
| 1024 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { |
| 1025 | |
| 1026 | if (adapter->unique_id == unique_id) { |
| 1027 | |
| 1028 | return MKADAP(index); |
| 1029 | } |
| 1030 | |
| 1031 | index++; |
| 1032 | } |
| 1033 | |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | |
| 1038 | /** |
| 1039 | * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | * @adp : Adapter softstate |
| 1041 | * |
| 1042 | * We maintain a pool of dma buffers per each adapter. Each pool has one |
| 1043 | * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers. |
| 1044 | * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We |
| 1045 | * dont' want to waste too much memory by allocating more buffers per each |
| 1046 | * pool. |
| 1047 | */ |
| 1048 | static int |
| 1049 | mraid_mm_setup_dma_pools(mraid_mmadp_t *adp) |
| 1050 | { |
| 1051 | mm_dmapool_t *pool; |
| 1052 | int bufsize; |
| 1053 | int i; |
| 1054 | |
| 1055 | /* |
| 1056 | * Create MAX_DMA_POOLS number of pools |
| 1057 | */ |
| 1058 | bufsize = MRAID_MM_INIT_BUFF_SIZE; |
| 1059 | |
| 1060 | for (i = 0; i < MAX_DMA_POOLS; i++){ |
| 1061 | |
| 1062 | pool = &adp->dma_pool_list[i]; |
| 1063 | |
| 1064 | pool->buf_size = bufsize; |
| 1065 | spin_lock_init(&pool->lock); |
| 1066 | |
| 1067 | pool->handle = pci_pool_create("megaraid mm data buffer", |
| 1068 | adp->pdev, bufsize, 16, 0); |
| 1069 | |
| 1070 | if (!pool->handle) { |
| 1071 | goto dma_pool_setup_error; |
| 1072 | } |
| 1073 | |
| 1074 | pool->vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, |
| 1075 | &pool->paddr); |
| 1076 | |
| 1077 | if (!pool->vaddr) |
| 1078 | goto dma_pool_setup_error; |
| 1079 | |
| 1080 | bufsize = bufsize * 2; |
| 1081 | } |
| 1082 | |
| 1083 | return 0; |
| 1084 | |
| 1085 | dma_pool_setup_error: |
| 1086 | |
| 1087 | mraid_mm_teardown_dma_pools(adp); |
| 1088 | return (-ENOMEM); |
| 1089 | } |
| 1090 | |
| 1091 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1092 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | * mraid_mm_unregister_adp - Unregister routine for low level drivers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | * @unique_id : UID of the adpater |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1095 | * |
| 1096 | * Assumes no outstanding ioctls to llds. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | */ |
| 1098 | int |
| 1099 | mraid_mm_unregister_adp(uint32_t unique_id) |
| 1100 | { |
| 1101 | mraid_mmadp_t *adapter; |
| 1102 | mraid_mmadp_t *tmp; |
| 1103 | |
| 1104 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { |
| 1105 | |
| 1106 | |
| 1107 | if (adapter->unique_id == unique_id) { |
| 1108 | |
| 1109 | adapters_count_g--; |
| 1110 | |
| 1111 | list_del_init(&adapter->list); |
| 1112 | |
| 1113 | mraid_mm_free_adp_resources(adapter); |
| 1114 | |
| 1115 | kfree(adapter); |
| 1116 | |
| 1117 | con_log(CL_ANN, ( |
| 1118 | "megaraid cmm: Unregistered one adapter:%#x\n", |
| 1119 | unique_id)); |
| 1120 | |
| 1121 | return 0; |
| 1122 | } |
| 1123 | } |
| 1124 | |
| 1125 | return (-ENODEV); |
| 1126 | } |
| 1127 | |
| 1128 | /** |
| 1129 | * mraid_mm_free_adp_resources - Free adapter softstate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | * @adp : Adapter softstate |
| 1131 | */ |
| 1132 | static void |
| 1133 | mraid_mm_free_adp_resources(mraid_mmadp_t *adp) |
| 1134 | { |
| 1135 | uioc_t *kioc; |
| 1136 | int i; |
| 1137 | |
| 1138 | mraid_mm_teardown_dma_pools(adp); |
| 1139 | |
| 1140 | for (i = 0; i < adp->max_kioc; i++) { |
| 1141 | |
| 1142 | kioc = adp->kioc_list + i; |
| 1143 | |
| 1144 | pci_pool_free(adp->pthru_dma_pool, kioc->pthru32, |
| 1145 | kioc->pthru32_h); |
| 1146 | } |
| 1147 | |
| 1148 | kfree(adp->kioc_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | kfree(adp->mbox_list); |
| 1150 | |
| 1151 | pci_pool_destroy(adp->pthru_dma_pool); |
| 1152 | |
| 1153 | |
| 1154 | return; |
| 1155 | } |
| 1156 | |
| 1157 | |
| 1158 | /** |
| 1159 | * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | * @adp : Adapter softstate |
| 1161 | */ |
| 1162 | static void |
| 1163 | mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp) |
| 1164 | { |
| 1165 | int i; |
| 1166 | mm_dmapool_t *pool; |
| 1167 | |
| 1168 | for (i = 0; i < MAX_DMA_POOLS; i++) { |
| 1169 | |
| 1170 | pool = &adp->dma_pool_list[i]; |
| 1171 | |
| 1172 | if (pool->handle) { |
| 1173 | |
| 1174 | if (pool->vaddr) |
| 1175 | pci_pool_free(pool->handle, pool->vaddr, |
| 1176 | pool->paddr); |
| 1177 | |
| 1178 | pci_pool_destroy(pool->handle); |
| 1179 | pool->handle = NULL; |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | return; |
| 1184 | } |
| 1185 | |
| 1186 | /** |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1187 | * mraid_mm_init - Module entry point |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | */ |
| 1189 | static int __init |
| 1190 | mraid_mm_init(void) |
| 1191 | { |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame^] | 1192 | int err; |
| 1193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | // Announce the driver version |
| 1195 | con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n", |
| 1196 | LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION)); |
| 1197 | |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame^] | 1198 | err = misc_register(&megaraid_mm_dev); |
| 1199 | if (err < 0) { |
| 1200 | con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n")); |
| 1201 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | } |
| 1203 | |
| 1204 | init_waitqueue_head(&wait_q); |
| 1205 | |
| 1206 | INIT_LIST_HEAD(&adapters_list_g); |
| 1207 | |
| 1208 | return 0; |
| 1209 | } |
| 1210 | |
| 1211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | #ifdef CONFIG_COMPAT |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1213 | /** |
| 1214 | * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine |
| 1215 | * @filep : file operations pointer (ignored) |
| 1216 | * @cmd : ioctl command |
| 1217 | * @arg : user ioctl packet |
| 1218 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | static long |
| 1220 | mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd, |
| 1221 | unsigned long arg) |
| 1222 | { |
| 1223 | int err; |
Ju, Seokmann | 672b2d3 | 2005-05-16 18:32:17 -0400 | [diff] [blame] | 1224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | err = mraid_mm_ioctl(NULL, filep, cmd, arg); |
Ju, Seokmann | 672b2d3 | 2005-05-16 18:32:17 -0400 | [diff] [blame] | 1226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | return err; |
| 1228 | } |
| 1229 | #endif |
| 1230 | |
| 1231 | /** |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1232 | * mraid_mm_exit - Module exit point |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | */ |
| 1234 | static void __exit |
| 1235 | mraid_mm_exit(void) |
| 1236 | { |
| 1237 | con_log(CL_DLEVEL1 , ("exiting common mod\n")); |
| 1238 | |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame^] | 1239 | misc_deregister(&megaraid_mm_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | } |
| 1241 | |
| 1242 | module_init(mraid_mm_init); |
| 1243 | module_exit(mraid_mm_exit); |
| 1244 | |
| 1245 | /* vi: set ts=8 sw=8 tw=78: */ |