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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 18 | #include <linux/slab.h> |
Arnd Bergmann | c45d15d | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 19 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "megaraid_mm.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | |
| 23 | // Entry points for char node driver |
Arnd Bergmann | c45d15d | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 24 | static DEFINE_MUTEX(mraid_mm_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | static int mraid_mm_open(struct inode *, struct file *); |
Arnd Bergmann | f4927c4 | 2010-04-27 00:24:01 +0200 | [diff] [blame] | 26 | static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
| 28 | |
| 29 | // routines to convert to and from the old the format |
| 30 | static int mimd_to_kioc(mimd_t __user *, mraid_mmadp_t *, uioc_t *); |
| 31 | static int kioc_to_mimd(uioc_t *, mimd_t __user *); |
| 32 | |
| 33 | |
| 34 | // Helper functions |
| 35 | static int handle_drvrcmd(void __user *, uint8_t, int *); |
| 36 | static int lld_ioctl(mraid_mmadp_t *, uioc_t *); |
| 37 | static void ioctl_done(uioc_t *); |
| 38 | static void lld_timedout(unsigned long); |
| 39 | static void hinfo_to_cinfo(mraid_hba_info_t *, mcontroller_t *); |
| 40 | static mraid_mmadp_t *mraid_mm_get_adapter(mimd_t __user *, int *); |
| 41 | static uioc_t *mraid_mm_alloc_kioc(mraid_mmadp_t *); |
| 42 | static void mraid_mm_dealloc_kioc(mraid_mmadp_t *, uioc_t *); |
| 43 | static int mraid_mm_attach_buf(mraid_mmadp_t *, uioc_t *, int); |
| 44 | static int mraid_mm_setup_dma_pools(mraid_mmadp_t *); |
| 45 | static void mraid_mm_free_adp_resources(mraid_mmadp_t *); |
| 46 | static void mraid_mm_teardown_dma_pools(mraid_mmadp_t *); |
| 47 | |
| 48 | #ifdef CONFIG_COMPAT |
| 49 | static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long); |
| 50 | #endif |
| 51 | |
| 52 | MODULE_AUTHOR("LSI Logic Corporation"); |
| 53 | MODULE_DESCRIPTION("LSI Logic Management Module"); |
| 54 | MODULE_LICENSE("GPL"); |
| 55 | MODULE_VERSION(LSI_COMMON_MOD_VERSION); |
| 56 | |
| 57 | static int dbglevel = CL_ANN; |
| 58 | module_param_named(dlevel, dbglevel, int, 0); |
| 59 | MODULE_PARM_DESC(dlevel, "Debug level (default=0)"); |
| 60 | |
| 61 | EXPORT_SYMBOL(mraid_mm_register_adp); |
| 62 | EXPORT_SYMBOL(mraid_mm_unregister_adp); |
| 63 | EXPORT_SYMBOL(mraid_mm_adapter_app_handle); |
| 64 | |
David Milburn | 2a4aa2c | 2007-04-19 12:10:24 -0500 | [diff] [blame] | 65 | static uint32_t drvr_ver = 0x02200207; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | static int adapters_count_g; |
| 68 | static struct list_head adapters_list_g; |
| 69 | |
| 70 | static wait_queue_head_t wait_q; |
| 71 | |
Arjan van de Ven | 00977a5 | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 72 | static const struct file_operations lsi_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | .open = mraid_mm_open, |
Arnd Bergmann | f4927c4 | 2010-04-27 00:24:01 +0200 | [diff] [blame] | 74 | .unlocked_ioctl = mraid_mm_unlocked_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #ifdef CONFIG_COMPAT |
| 76 | .compat_ioctl = mraid_mm_compat_ioctl, |
| 77 | #endif |
| 78 | .owner = THIS_MODULE, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 79 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | }; |
| 81 | |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame] | 82 | static struct miscdevice megaraid_mm_dev = { |
| 83 | .minor = MISC_DYNAMIC_MINOR, |
| 84 | .name = "megadev0", |
| 85 | .fops = &lsi_fops, |
| 86 | }; |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | /** |
| 89 | * mraid_mm_open - open routine for char node interface |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 90 | * @inode : unused |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | * @filep : unused |
| 92 | * |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 93 | * Allow ioctl operations by apps only if they have superuser privilege. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | */ |
| 95 | static int |
| 96 | mraid_mm_open(struct inode *inode, struct file *filep) |
| 97 | { |
| 98 | /* |
| 99 | * Only allow superuser to access private ioctl interface |
| 100 | */ |
| 101 | if (!capable(CAP_SYS_ADMIN)) return (-EACCES); |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * mraid_mm_ioctl - module entry-point for ioctls |
| 108 | * @inode : inode (ignored) |
| 109 | * @filep : file operations pointer (ignored) |
| 110 | * @cmd : ioctl command |
| 111 | * @arg : user ioctl packet |
| 112 | */ |
| 113 | static int |
Arnd Bergmann | f4927c4 | 2010-04-27 00:24:01 +0200 | [diff] [blame] | 114 | mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
| 116 | uioc_t *kioc; |
| 117 | char signature[EXT_IOCTL_SIGN_SZ] = {0}; |
| 118 | int rval; |
| 119 | mraid_mmadp_t *adp; |
| 120 | uint8_t old_ioctl; |
| 121 | int drvrcmd_rval; |
| 122 | void __user *argp = (void __user *)arg; |
| 123 | |
| 124 | /* |
| 125 | * Make sure only USCSICMD are issued through this interface. |
| 126 | * MIMD application would still fire different command. |
| 127 | */ |
| 128 | |
| 129 | if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) { |
| 130 | return (-EINVAL); |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * Look for signature to see if this is the new or old ioctl format. |
| 135 | */ |
| 136 | if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) { |
| 137 | con_log(CL_ANN, (KERN_WARNING |
| 138 | "megaraid cmm: copy from usr addr failed\n")); |
| 139 | return (-EFAULT); |
| 140 | } |
| 141 | |
| 142 | if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0) |
| 143 | old_ioctl = 0; |
| 144 | else |
| 145 | old_ioctl = 1; |
| 146 | |
| 147 | /* |
| 148 | * At present, we don't support the new ioctl packet |
| 149 | */ |
| 150 | if (!old_ioctl ) |
| 151 | return (-EINVAL); |
| 152 | |
| 153 | /* |
| 154 | * If it is a driver ioctl (as opposed to fw ioctls), then we can |
| 155 | * handle the command locally. rval > 0 means it is not a drvr cmd |
| 156 | */ |
| 157 | rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval); |
| 158 | |
| 159 | if (rval < 0) |
| 160 | return rval; |
| 161 | else if (rval == 0) |
| 162 | return drvrcmd_rval; |
| 163 | |
| 164 | rval = 0; |
| 165 | if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) { |
| 166 | return rval; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Check if adapter can accept ioctl. We may have marked it offline |
| 171 | * if any previous kioc had timedout on this controller. |
| 172 | */ |
| 173 | if (!adp->quiescent) { |
| 174 | con_log(CL_ANN, (KERN_WARNING |
| 175 | "megaraid cmm: controller cannot accept cmds due to " |
| 176 | "earlier errors\n" )); |
| 177 | return -EFAULT; |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * The following call will block till a kioc is available |
| 182 | */ |
| 183 | kioc = mraid_mm_alloc_kioc(adp); |
| 184 | |
| 185 | /* |
| 186 | * User sent the old mimd_t ioctl packet. Convert it to uioc_t. |
| 187 | */ |
| 188 | if ((rval = mimd_to_kioc(argp, adp, kioc))) { |
| 189 | mraid_mm_dealloc_kioc(adp, kioc); |
| 190 | return rval; |
| 191 | } |
| 192 | |
| 193 | kioc->done = ioctl_done; |
| 194 | |
| 195 | /* |
| 196 | * Issue the IOCTL to the low level driver. After the IOCTL completes |
| 197 | * release the kioc if and only if it was _not_ timedout. If it was |
| 198 | * timedout, that means that resources are still with low level driver. |
| 199 | */ |
| 200 | if ((rval = lld_ioctl(adp, kioc))) { |
| 201 | |
| 202 | if (!kioc->timedout) |
| 203 | mraid_mm_dealloc_kioc(adp, kioc); |
| 204 | |
| 205 | return rval; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * Convert the kioc back to user space |
| 210 | */ |
| 211 | rval = kioc_to_mimd(kioc, argp); |
| 212 | |
| 213 | /* |
| 214 | * Return the kioc to free pool |
| 215 | */ |
| 216 | mraid_mm_dealloc_kioc(adp, kioc); |
| 217 | |
| 218 | return rval; |
| 219 | } |
| 220 | |
Arnd Bergmann | f4927c4 | 2010-04-27 00:24:01 +0200 | [diff] [blame] | 221 | static long |
| 222 | mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd, |
| 223 | unsigned long arg) |
| 224 | { |
| 225 | int err; |
| 226 | |
Uwe Kleine-König | a34f0b3 | 2010-12-10 14:55:42 +0100 | [diff] [blame^] | 227 | /* inconsistent: mraid_mm_compat_ioctl doesn't take the BKL */ |
Arnd Bergmann | c45d15d | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 228 | mutex_lock(&mraid_mm_mutex); |
Arnd Bergmann | f4927c4 | 2010-04-27 00:24:01 +0200 | [diff] [blame] | 229 | err = mraid_mm_ioctl(filep, cmd, arg); |
Arnd Bergmann | c45d15d | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 230 | mutex_unlock(&mraid_mm_mutex); |
Arnd Bergmann | f4927c4 | 2010-04-27 00:24:01 +0200 | [diff] [blame] | 231 | |
| 232 | return err; |
| 233 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
| 235 | /** |
| 236 | * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet |
| 237 | * @umimd : User space mimd_t ioctl packet |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 238 | * @rval : returned success/error status |
| 239 | * |
| 240 | * The function return value is a pointer to the located @adapter. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | */ |
| 242 | static mraid_mmadp_t * |
| 243 | mraid_mm_get_adapter(mimd_t __user *umimd, int *rval) |
| 244 | { |
| 245 | mraid_mmadp_t *adapter; |
| 246 | mimd_t mimd; |
| 247 | uint32_t adapno; |
| 248 | int iterator; |
| 249 | |
| 250 | |
| 251 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) { |
| 252 | *rval = -EFAULT; |
| 253 | return NULL; |
| 254 | } |
| 255 | |
| 256 | adapno = GETADAP(mimd.ui.fcs.adapno); |
| 257 | |
| 258 | if (adapno >= adapters_count_g) { |
| 259 | *rval = -ENODEV; |
| 260 | return NULL; |
| 261 | } |
| 262 | |
| 263 | adapter = NULL; |
| 264 | iterator = 0; |
| 265 | |
| 266 | list_for_each_entry(adapter, &adapters_list_g, list) { |
| 267 | if (iterator++ == adapno) break; |
| 268 | } |
| 269 | |
| 270 | if (!adapter) { |
| 271 | *rval = -ENODEV; |
| 272 | return NULL; |
| 273 | } |
| 274 | |
| 275 | return adapter; |
| 276 | } |
| 277 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 278 | /** |
| 279 | * 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] | 280 | * @arg : packet sent by the user app |
| 281 | * @old_ioctl : mimd if 1; uioc otherwise |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 282 | * @rval : pointer for command's returned value (not function status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | */ |
| 284 | static int |
| 285 | handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval) |
| 286 | { |
| 287 | mimd_t __user *umimd; |
| 288 | mimd_t kmimd; |
| 289 | uint8_t opcode; |
| 290 | uint8_t subopcode; |
| 291 | |
| 292 | if (old_ioctl) |
| 293 | goto old_packet; |
| 294 | else |
| 295 | goto new_packet; |
| 296 | |
| 297 | new_packet: |
| 298 | return (-ENOTSUPP); |
| 299 | |
| 300 | old_packet: |
| 301 | *rval = 0; |
| 302 | umimd = arg; |
| 303 | |
| 304 | if (copy_from_user(&kmimd, umimd, sizeof(mimd_t))) |
| 305 | return (-EFAULT); |
| 306 | |
| 307 | opcode = kmimd.ui.fcs.opcode; |
| 308 | subopcode = kmimd.ui.fcs.subopcode; |
| 309 | |
| 310 | /* |
| 311 | * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or |
| 312 | * GET_NUMADP, then we can handle. Otherwise we should return 1 to |
| 313 | * indicate that we cannot handle this. |
| 314 | */ |
| 315 | if (opcode != 0x82) |
| 316 | return 1; |
| 317 | |
| 318 | switch (subopcode) { |
| 319 | |
| 320 | case MEGAIOC_QDRVRVER: |
| 321 | |
| 322 | if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t))) |
| 323 | return (-EFAULT); |
| 324 | |
| 325 | return 0; |
| 326 | |
| 327 | case MEGAIOC_QNADAP: |
| 328 | |
| 329 | *rval = adapters_count_g; |
| 330 | |
| 331 | if (copy_to_user(kmimd.data, &adapters_count_g, |
| 332 | sizeof(uint32_t))) |
| 333 | return (-EFAULT); |
| 334 | |
| 335 | return 0; |
| 336 | |
| 337 | default: |
| 338 | /* cannot handle */ |
| 339 | return 1; |
| 340 | } |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | |
| 346 | /** |
| 347 | * mimd_to_kioc - Converter from old to new ioctl format |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | * @umimd : user space old MIMD IOCTL |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 349 | * @adp : adapter softstate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | * @kioc : kernel space new format IOCTL |
| 351 | * |
| 352 | * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The |
| 353 | * new packet is in kernel space so that driver can perform operations on it |
| 354 | * freely. |
| 355 | */ |
| 356 | |
| 357 | static int |
| 358 | mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) |
| 359 | { |
| 360 | mbox64_t *mbox64; |
| 361 | mbox_t *mbox; |
| 362 | mraid_passthru_t *pthru32; |
| 363 | uint32_t adapno; |
| 364 | uint8_t opcode; |
| 365 | uint8_t subopcode; |
| 366 | mimd_t mimd; |
| 367 | |
| 368 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) |
| 369 | return (-EFAULT); |
| 370 | |
| 371 | /* |
| 372 | * Applications are not allowed to send extd pthru |
| 373 | */ |
| 374 | if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) || |
| 375 | (mimd.mbox[0] == MBOXCMD_EXTPTHRU)) |
| 376 | return (-EINVAL); |
| 377 | |
| 378 | opcode = mimd.ui.fcs.opcode; |
| 379 | subopcode = mimd.ui.fcs.subopcode; |
| 380 | adapno = GETADAP(mimd.ui.fcs.adapno); |
| 381 | |
| 382 | if (adapno >= adapters_count_g) |
| 383 | return (-ENODEV); |
| 384 | |
| 385 | kioc->adapno = adapno; |
| 386 | kioc->mb_type = MBOX_LEGACY; |
| 387 | kioc->app_type = APPTYPE_MIMD; |
| 388 | |
| 389 | switch (opcode) { |
| 390 | |
| 391 | case 0x82: |
| 392 | |
| 393 | if (subopcode == MEGAIOC_QADAPINFO) { |
| 394 | |
| 395 | kioc->opcode = GET_ADAP_INFO; |
| 396 | kioc->data_dir = UIOC_RD; |
| 397 | kioc->xferlen = sizeof(mraid_hba_info_t); |
| 398 | |
| 399 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| 400 | return (-ENOMEM); |
| 401 | } |
| 402 | else { |
| 403 | con_log(CL_ANN, (KERN_WARNING |
| 404 | "megaraid cmm: Invalid subop\n")); |
| 405 | return (-EINVAL); |
| 406 | } |
| 407 | |
| 408 | break; |
| 409 | |
| 410 | case 0x81: |
| 411 | |
| 412 | kioc->opcode = MBOX_CMD; |
| 413 | kioc->xferlen = mimd.ui.fcs.length; |
| 414 | kioc->user_data_len = kioc->xferlen; |
| 415 | kioc->user_data = mimd.ui.fcs.buffer; |
| 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 | case 0x80: |
| 426 | |
| 427 | kioc->opcode = MBOX_CMD; |
| 428 | kioc->xferlen = (mimd.outlen > mimd.inlen) ? |
| 429 | mimd.outlen : mimd.inlen; |
| 430 | kioc->user_data_len = kioc->xferlen; |
| 431 | kioc->user_data = mimd.data; |
| 432 | |
| 433 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| 434 | return (-ENOMEM); |
| 435 | |
| 436 | if (mimd.outlen) kioc->data_dir = UIOC_RD; |
| 437 | if (mimd.inlen) kioc->data_dir |= UIOC_WR; |
| 438 | |
| 439 | break; |
| 440 | |
| 441 | default: |
| 442 | return (-EINVAL); |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * If driver command, nothing else to do |
| 447 | */ |
| 448 | if (opcode == 0x82) |
| 449 | return 0; |
| 450 | |
| 451 | /* |
| 452 | * This is a mailbox cmd; copy the mailbox from mimd |
| 453 | */ |
| 454 | mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf); |
| 455 | mbox = &mbox64->mbox32; |
| 456 | memcpy(mbox, mimd.mbox, 14); |
| 457 | |
| 458 | if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD |
| 459 | |
| 460 | mbox->xferaddr = (uint32_t)kioc->buf_paddr; |
| 461 | |
| 462 | if (kioc->data_dir & UIOC_WR) { |
| 463 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
| 464 | kioc->xferlen)) { |
| 465 | return (-EFAULT); |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | /* |
| 473 | * This is a regular 32-bit pthru cmd; mbox points to pthru struct. |
| 474 | * Just like in above case, the beginning for memblk is treated as |
| 475 | * a mailbox. The passthru will begin at next 1K boundary. And the |
| 476 | * data will start 1K after that. |
| 477 | */ |
| 478 | pthru32 = kioc->pthru32; |
| 479 | kioc->user_pthru = &umimd->pthru; |
| 480 | mbox->xferaddr = (uint32_t)kioc->pthru32_h; |
| 481 | |
| 482 | if (copy_from_user(pthru32, kioc->user_pthru, |
| 483 | sizeof(mraid_passthru_t))) { |
| 484 | return (-EFAULT); |
| 485 | } |
| 486 | |
| 487 | pthru32->dataxferaddr = kioc->buf_paddr; |
| 488 | if (kioc->data_dir & UIOC_WR) { |
| 489 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
| 490 | pthru32->dataxferlen)) { |
| 491 | return (-EFAULT); |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | /** |
| 499 | * mraid_mm_attch_buf - Attach a free dma buffer for required size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | * @adp : Adapter softstate |
| 501 | * @kioc : kioc that the buffer needs to be attached to |
| 502 | * @xferlen : required length for buffer |
| 503 | * |
| 504 | * First we search for a pool with smallest buffer that is >= @xferlen. If |
| 505 | * that pool has no free buffer, we will try for the next bigger size. If none |
| 506 | * is available, we will try to allocate the smallest buffer that is >= |
| 507 | * @xferlen and attach it the pool. |
| 508 | */ |
| 509 | static int |
| 510 | mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen) |
| 511 | { |
| 512 | mm_dmapool_t *pool; |
| 513 | int right_pool = -1; |
| 514 | unsigned long flags; |
| 515 | int i; |
| 516 | |
| 517 | kioc->pool_index = -1; |
| 518 | kioc->buf_vaddr = NULL; |
| 519 | kioc->buf_paddr = 0; |
| 520 | kioc->free_buf = 0; |
| 521 | |
| 522 | /* |
| 523 | * We need xferlen amount of memory. See if we can get it from our |
| 524 | * dma pools. If we don't get exact size, we will try bigger buffer |
| 525 | */ |
| 526 | |
| 527 | for (i = 0; i < MAX_DMA_POOLS; i++) { |
| 528 | |
| 529 | pool = &adp->dma_pool_list[i]; |
| 530 | |
| 531 | if (xferlen > pool->buf_size) |
| 532 | continue; |
| 533 | |
| 534 | if (right_pool == -1) |
| 535 | right_pool = i; |
| 536 | |
| 537 | spin_lock_irqsave(&pool->lock, flags); |
| 538 | |
| 539 | if (!pool->in_use) { |
| 540 | |
| 541 | pool->in_use = 1; |
| 542 | kioc->pool_index = i; |
| 543 | kioc->buf_vaddr = pool->vaddr; |
| 544 | kioc->buf_paddr = pool->paddr; |
| 545 | |
| 546 | spin_unlock_irqrestore(&pool->lock, flags); |
| 547 | return 0; |
| 548 | } |
| 549 | else { |
| 550 | spin_unlock_irqrestore(&pool->lock, flags); |
| 551 | continue; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /* |
| 556 | * If xferlen doesn't match any of our pools, return error |
| 557 | */ |
| 558 | if (right_pool == -1) |
| 559 | return -EINVAL; |
| 560 | |
| 561 | /* |
| 562 | * We did not get any buffer from the preallocated pool. Let us try |
| 563 | * to allocate one new buffer. NOTE: This is a blocking call. |
| 564 | */ |
| 565 | pool = &adp->dma_pool_list[right_pool]; |
| 566 | |
| 567 | spin_lock_irqsave(&pool->lock, flags); |
| 568 | |
| 569 | kioc->pool_index = right_pool; |
| 570 | kioc->free_buf = 1; |
| 571 | kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, |
| 572 | &kioc->buf_paddr); |
| 573 | spin_unlock_irqrestore(&pool->lock, flags); |
| 574 | |
| 575 | if (!kioc->buf_vaddr) |
| 576 | return -ENOMEM; |
| 577 | |
| 578 | return 0; |
| 579 | } |
| 580 | |
| 581 | /** |
| 582 | * mraid_mm_alloc_kioc - Returns a uioc_t from free list |
| 583 | * @adp : Adapter softstate for this module |
| 584 | * |
| 585 | * The kioc_semaphore is initialized with number of kioc nodes in the |
| 586 | * free kioc pool. If the kioc pool is empty, this function blocks till |
| 587 | * a kioc becomes free. |
| 588 | */ |
| 589 | static uioc_t * |
| 590 | mraid_mm_alloc_kioc(mraid_mmadp_t *adp) |
| 591 | { |
| 592 | uioc_t *kioc; |
| 593 | struct list_head* head; |
| 594 | unsigned long flags; |
| 595 | |
| 596 | down(&adp->kioc_semaphore); |
| 597 | |
| 598 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); |
| 599 | |
| 600 | head = &adp->kioc_pool; |
| 601 | |
| 602 | if (list_empty(head)) { |
| 603 | up(&adp->kioc_semaphore); |
| 604 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| 605 | |
| 606 | con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n")); |
| 607 | return NULL; |
| 608 | } |
| 609 | |
| 610 | kioc = list_entry(head->next, uioc_t, list); |
| 611 | list_del_init(&kioc->list); |
| 612 | |
| 613 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| 614 | |
| 615 | memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t)); |
| 616 | memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t)); |
| 617 | |
| 618 | kioc->buf_vaddr = NULL; |
| 619 | kioc->buf_paddr = 0; |
| 620 | kioc->pool_index =-1; |
| 621 | kioc->free_buf = 0; |
| 622 | kioc->user_data = NULL; |
| 623 | kioc->user_data_len = 0; |
| 624 | kioc->user_pthru = NULL; |
| 625 | kioc->timedout = 0; |
| 626 | |
| 627 | return kioc; |
| 628 | } |
| 629 | |
| 630 | /** |
| 631 | * mraid_mm_dealloc_kioc - Return kioc to free pool |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | * @adp : Adapter softstate |
| 633 | * @kioc : uioc_t node to be returned to free pool |
| 634 | */ |
| 635 | static void |
| 636 | mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc) |
| 637 | { |
| 638 | mm_dmapool_t *pool; |
| 639 | unsigned long flags; |
| 640 | |
| 641 | if (kioc->pool_index != -1) { |
| 642 | pool = &adp->dma_pool_list[kioc->pool_index]; |
| 643 | |
| 644 | /* This routine may be called in non-isr context also */ |
| 645 | spin_lock_irqsave(&pool->lock, flags); |
| 646 | |
| 647 | /* |
| 648 | * While attaching the dma buffer, if we didn't get the |
| 649 | * required buffer from the pool, we would have allocated |
| 650 | * it at the run time and set the free_buf flag. We must |
| 651 | * free that buffer. Otherwise, just mark that the buffer is |
| 652 | * not in use |
| 653 | */ |
| 654 | if (kioc->free_buf == 1) |
| 655 | pci_pool_free(pool->handle, kioc->buf_vaddr, |
| 656 | kioc->buf_paddr); |
| 657 | else |
| 658 | pool->in_use = 0; |
| 659 | |
| 660 | spin_unlock_irqrestore(&pool->lock, flags); |
| 661 | } |
| 662 | |
| 663 | /* Return the kioc to the free pool */ |
| 664 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); |
| 665 | list_add(&kioc->list, &adp->kioc_pool); |
| 666 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| 667 | |
| 668 | /* increment the free kioc count */ |
| 669 | up(&adp->kioc_semaphore); |
| 670 | |
| 671 | return; |
| 672 | } |
| 673 | |
| 674 | /** |
| 675 | * lld_ioctl - Routine to issue ioctl to low level drvr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | * @adp : The adapter handle |
| 677 | * @kioc : The ioctl packet with kernel addresses |
| 678 | */ |
| 679 | static int |
| 680 | lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc) |
| 681 | { |
| 682 | int rval; |
| 683 | struct timer_list timer; |
| 684 | struct timer_list *tp = NULL; |
| 685 | |
| 686 | kioc->status = -ENODATA; |
| 687 | rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE); |
| 688 | |
| 689 | if (rval) return rval; |
| 690 | |
| 691 | /* |
| 692 | * Start the timer |
| 693 | */ |
| 694 | if (adp->timeout > 0) { |
| 695 | tp = &timer; |
| 696 | init_timer(tp); |
| 697 | |
| 698 | tp->function = lld_timedout; |
| 699 | tp->data = (unsigned long)kioc; |
| 700 | tp->expires = jiffies + adp->timeout * HZ; |
| 701 | |
| 702 | add_timer(tp); |
| 703 | } |
| 704 | |
| 705 | /* |
| 706 | * Wait till the low level driver completes the ioctl. After this |
| 707 | * call, the ioctl either completed successfully or timedout. |
| 708 | */ |
| 709 | wait_event(wait_q, (kioc->status != -ENODATA)); |
| 710 | if (tp) { |
| 711 | del_timer_sync(tp); |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * If the command had timedout, we mark the controller offline |
| 716 | * before returning |
| 717 | */ |
| 718 | if (kioc->timedout) { |
| 719 | adp->quiescent = 0; |
| 720 | } |
| 721 | |
| 722 | return kioc->status; |
| 723 | } |
| 724 | |
| 725 | |
| 726 | /** |
| 727 | * ioctl_done - callback from the low level driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | * @kioc : completed ioctl packet |
| 729 | */ |
| 730 | static void |
| 731 | ioctl_done(uioc_t *kioc) |
| 732 | { |
| 733 | uint32_t adapno; |
| 734 | int iterator; |
| 735 | mraid_mmadp_t* adapter; |
| 736 | |
| 737 | /* |
| 738 | * When the kioc returns from driver, make sure it still doesn't |
| 739 | * have ENODATA in status. Otherwise, driver will hang on wait_event |
| 740 | * forever |
| 741 | */ |
| 742 | if (kioc->status == -ENODATA) { |
| 743 | con_log(CL_ANN, (KERN_WARNING |
| 744 | "megaraid cmm: lld didn't change status!\n")); |
| 745 | |
| 746 | kioc->status = -EINVAL; |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * Check if this kioc was timedout before. If so, nobody is waiting |
| 751 | * on this kioc. We don't have to wake up anybody. Instead, we just |
| 752 | * have to free the kioc |
| 753 | */ |
| 754 | if (kioc->timedout) { |
| 755 | iterator = 0; |
| 756 | adapter = NULL; |
| 757 | adapno = kioc->adapno; |
| 758 | |
| 759 | con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed " |
| 760 | "ioctl that was timedout before\n")); |
| 761 | |
| 762 | list_for_each_entry(adapter, &adapters_list_g, list) { |
| 763 | if (iterator++ == adapno) break; |
| 764 | } |
| 765 | |
| 766 | kioc->timedout = 0; |
| 767 | |
| 768 | if (adapter) { |
| 769 | mraid_mm_dealloc_kioc( adapter, kioc ); |
| 770 | } |
| 771 | } |
| 772 | else { |
| 773 | wake_up(&wait_q); |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 778 | /** |
| 779 | * lld_timedout - callback from the expired timer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | * @ptr : ioctl packet that timed out |
| 781 | */ |
| 782 | static void |
| 783 | lld_timedout(unsigned long ptr) |
| 784 | { |
| 785 | uioc_t *kioc = (uioc_t *)ptr; |
| 786 | |
| 787 | kioc->status = -ETIME; |
| 788 | kioc->timedout = 1; |
| 789 | |
| 790 | con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n")); |
| 791 | |
| 792 | wake_up(&wait_q); |
| 793 | } |
| 794 | |
| 795 | |
| 796 | /** |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 797 | * kioc_to_mimd - Converter from new back to old format |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | * @kioc : Kernel space IOCTL packet (successfully issued) |
| 799 | * @mimd : User space MIMD packet |
| 800 | */ |
| 801 | static int |
| 802 | kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd) |
| 803 | { |
| 804 | mimd_t kmimd; |
| 805 | uint8_t opcode; |
| 806 | uint8_t subopcode; |
| 807 | |
| 808 | mbox64_t *mbox64; |
| 809 | mraid_passthru_t __user *upthru32; |
| 810 | mraid_passthru_t *kpthru32; |
| 811 | mcontroller_t cinfo; |
| 812 | mraid_hba_info_t *hinfo; |
| 813 | |
| 814 | |
| 815 | if (copy_from_user(&kmimd, mimd, sizeof(mimd_t))) |
| 816 | return (-EFAULT); |
| 817 | |
| 818 | opcode = kmimd.ui.fcs.opcode; |
| 819 | subopcode = kmimd.ui.fcs.subopcode; |
| 820 | |
| 821 | if (opcode == 0x82) { |
| 822 | switch (subopcode) { |
| 823 | |
| 824 | case MEGAIOC_QADAPINFO: |
| 825 | |
| 826 | hinfo = (mraid_hba_info_t *)(unsigned long) |
| 827 | kioc->buf_vaddr; |
| 828 | |
| 829 | hinfo_to_cinfo(hinfo, &cinfo); |
| 830 | |
| 831 | if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo))) |
| 832 | return (-EFAULT); |
| 833 | |
| 834 | return 0; |
| 835 | |
| 836 | default: |
| 837 | return (-EINVAL); |
| 838 | } |
| 839 | |
| 840 | return 0; |
| 841 | } |
| 842 | |
| 843 | mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; |
| 844 | |
| 845 | if (kioc->user_pthru) { |
| 846 | |
| 847 | upthru32 = kioc->user_pthru; |
| 848 | kpthru32 = kioc->pthru32; |
| 849 | |
| 850 | if (copy_to_user(&upthru32->scsistatus, |
| 851 | &kpthru32->scsistatus, |
| 852 | sizeof(uint8_t))) { |
| 853 | return (-EFAULT); |
| 854 | } |
| 855 | } |
| 856 | |
| 857 | if (kioc->user_data) { |
| 858 | if (copy_to_user(kioc->user_data, kioc->buf_vaddr, |
| 859 | kioc->user_data_len)) { |
| 860 | return (-EFAULT); |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | if (copy_to_user(&mimd->mbox[17], |
| 865 | &mbox64->mbox32.status, sizeof(uint8_t))) { |
| 866 | return (-EFAULT); |
| 867 | } |
| 868 | |
| 869 | return 0; |
| 870 | } |
| 871 | |
| 872 | |
| 873 | /** |
| 874 | * hinfo_to_cinfo - Convert new format hba info into old format |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | * @hinfo : New format, more comprehensive adapter info |
| 876 | * @cinfo : Old format adapter info to support mimd_t apps |
| 877 | */ |
| 878 | static void |
| 879 | hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo) |
| 880 | { |
| 881 | if (!hinfo || !cinfo) |
| 882 | return; |
| 883 | |
| 884 | cinfo->base = hinfo->baseport; |
| 885 | cinfo->irq = hinfo->irq; |
| 886 | cinfo->numldrv = hinfo->num_ldrv; |
| 887 | cinfo->pcibus = hinfo->pci_bus; |
| 888 | cinfo->pcidev = hinfo->pci_slot; |
| 889 | cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn); |
| 890 | cinfo->pciid = hinfo->pci_device_id; |
| 891 | cinfo->pcivendor = hinfo->pci_vendor_id; |
| 892 | cinfo->pcislot = hinfo->pci_slot; |
| 893 | cinfo->uid = hinfo->unique_id; |
| 894 | } |
| 895 | |
| 896 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 897 | /** |
| 898 | * mraid_mm_register_adp - Registration routine for low level drivers |
| 899 | * @lld_adp : Adapter objejct |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | */ |
| 901 | int |
| 902 | mraid_mm_register_adp(mraid_mmadp_t *lld_adp) |
| 903 | { |
| 904 | mraid_mmadp_t *adapter; |
| 905 | mbox64_t *mbox_list; |
| 906 | uioc_t *kioc; |
| 907 | uint32_t rval; |
| 908 | int i; |
| 909 | |
| 910 | |
| 911 | if (lld_adp->drvr_type != DRVRTYPE_MBOX) |
| 912 | return (-EINVAL); |
| 913 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 914 | adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
Adrian Bunk | 5236467 | 2006-03-10 23:24:55 +0100 | [diff] [blame] | 916 | if (!adapter) |
| 917 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
| 920 | adapter->unique_id = lld_adp->unique_id; |
| 921 | adapter->drvr_type = lld_adp->drvr_type; |
| 922 | adapter->drvr_data = lld_adp->drvr_data; |
| 923 | adapter->pdev = lld_adp->pdev; |
| 924 | adapter->issue_uioc = lld_adp->issue_uioc; |
| 925 | adapter->timeout = lld_adp->timeout; |
| 926 | adapter->max_kioc = lld_adp->max_kioc; |
| 927 | adapter->quiescent = 1; |
| 928 | |
| 929 | /* |
| 930 | * Allocate single blocks of memory for all required kiocs, |
| 931 | * mailboxes and passthru structures. |
| 932 | */ |
| 933 | adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc, |
| 934 | GFP_KERNEL); |
| 935 | adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc, |
| 936 | GFP_KERNEL); |
| 937 | adapter->pthru_dma_pool = pci_pool_create("megaraid mm pthru pool", |
| 938 | adapter->pdev, |
| 939 | sizeof(mraid_passthru_t), |
| 940 | 16, 0); |
| 941 | |
| 942 | if (!adapter->kioc_list || !adapter->mbox_list || |
| 943 | !adapter->pthru_dma_pool) { |
| 944 | |
| 945 | con_log(CL_ANN, (KERN_WARNING |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 946 | "megaraid cmm: out of memory, %s %d\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | __LINE__)); |
| 948 | |
| 949 | rval = (-ENOMEM); |
| 950 | |
| 951 | goto memalloc_error; |
| 952 | } |
| 953 | |
| 954 | /* |
| 955 | * Slice kioc_list and make a kioc_pool with the individiual kiocs |
| 956 | */ |
| 957 | INIT_LIST_HEAD(&adapter->kioc_pool); |
| 958 | spin_lock_init(&adapter->kioc_pool_lock); |
| 959 | sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc); |
| 960 | |
| 961 | mbox_list = (mbox64_t *)adapter->mbox_list; |
| 962 | |
| 963 | for (i = 0; i < lld_adp->max_kioc; i++) { |
| 964 | |
| 965 | kioc = adapter->kioc_list + i; |
| 966 | kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i); |
| 967 | kioc->pthru32 = pci_pool_alloc(adapter->pthru_dma_pool, |
| 968 | GFP_KERNEL, &kioc->pthru32_h); |
| 969 | |
| 970 | if (!kioc->pthru32) { |
| 971 | |
| 972 | con_log(CL_ANN, (KERN_WARNING |
| 973 | "megaraid cmm: out of memory, %s %d\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 974 | __func__, __LINE__)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
| 976 | rval = (-ENOMEM); |
| 977 | |
| 978 | goto pthru_dma_pool_error; |
| 979 | } |
| 980 | |
| 981 | list_add_tail(&kioc->list, &adapter->kioc_pool); |
| 982 | } |
| 983 | |
| 984 | // Setup the dma pools for data buffers |
| 985 | if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) { |
| 986 | goto dma_pool_error; |
| 987 | } |
| 988 | |
| 989 | list_add_tail(&adapter->list, &adapters_list_g); |
| 990 | |
| 991 | adapters_count_g++; |
| 992 | |
| 993 | return 0; |
| 994 | |
| 995 | dma_pool_error: |
| 996 | /* Do nothing */ |
| 997 | |
| 998 | pthru_dma_pool_error: |
| 999 | |
| 1000 | for (i = 0; i < lld_adp->max_kioc; i++) { |
| 1001 | kioc = adapter->kioc_list + i; |
| 1002 | if (kioc->pthru32) { |
| 1003 | pci_pool_free(adapter->pthru_dma_pool, kioc->pthru32, |
| 1004 | kioc->pthru32_h); |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | memalloc_error: |
| 1009 | |
Jesper Juhl | c9475cb | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 1010 | kfree(adapter->kioc_list); |
| 1011 | kfree(adapter->mbox_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
| 1013 | if (adapter->pthru_dma_pool) |
| 1014 | pci_pool_destroy(adapter->pthru_dma_pool); |
| 1015 | |
Jesper Juhl | c9475cb | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 1016 | kfree(adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
| 1018 | return rval; |
| 1019 | } |
| 1020 | |
| 1021 | |
| 1022 | /** |
| 1023 | * mraid_mm_adapter_app_handle - return the application handle for this adapter |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1024 | * @unique_id : adapter unique identifier |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | * |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1026 | * 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] | 1027 | * return the corresponding handle, which is also used by applications to |
| 1028 | * uniquely identify an adapter. |
| 1029 | * |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1030 | * Return adapter handle if found in the list. |
| 1031 | * Return 0 if adapter could not be located, should never happen though. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | */ |
| 1033 | uint32_t |
| 1034 | mraid_mm_adapter_app_handle(uint32_t unique_id) |
| 1035 | { |
| 1036 | mraid_mmadp_t *adapter; |
| 1037 | mraid_mmadp_t *tmp; |
| 1038 | int index = 0; |
| 1039 | |
| 1040 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { |
| 1041 | |
| 1042 | if (adapter->unique_id == unique_id) { |
| 1043 | |
| 1044 | return MKADAP(index); |
| 1045 | } |
| 1046 | |
| 1047 | index++; |
| 1048 | } |
| 1049 | |
| 1050 | return 0; |
| 1051 | } |
| 1052 | |
| 1053 | |
| 1054 | /** |
| 1055 | * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | * @adp : Adapter softstate |
| 1057 | * |
| 1058 | * We maintain a pool of dma buffers per each adapter. Each pool has one |
| 1059 | * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers. |
| 1060 | * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We |
| 1061 | * dont' want to waste too much memory by allocating more buffers per each |
| 1062 | * pool. |
| 1063 | */ |
| 1064 | static int |
| 1065 | mraid_mm_setup_dma_pools(mraid_mmadp_t *adp) |
| 1066 | { |
| 1067 | mm_dmapool_t *pool; |
| 1068 | int bufsize; |
| 1069 | int i; |
| 1070 | |
| 1071 | /* |
| 1072 | * Create MAX_DMA_POOLS number of pools |
| 1073 | */ |
| 1074 | bufsize = MRAID_MM_INIT_BUFF_SIZE; |
| 1075 | |
| 1076 | for (i = 0; i < MAX_DMA_POOLS; i++){ |
| 1077 | |
| 1078 | pool = &adp->dma_pool_list[i]; |
| 1079 | |
| 1080 | pool->buf_size = bufsize; |
| 1081 | spin_lock_init(&pool->lock); |
| 1082 | |
| 1083 | pool->handle = pci_pool_create("megaraid mm data buffer", |
| 1084 | adp->pdev, bufsize, 16, 0); |
| 1085 | |
| 1086 | if (!pool->handle) { |
| 1087 | goto dma_pool_setup_error; |
| 1088 | } |
| 1089 | |
| 1090 | pool->vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, |
| 1091 | &pool->paddr); |
| 1092 | |
| 1093 | if (!pool->vaddr) |
| 1094 | goto dma_pool_setup_error; |
| 1095 | |
| 1096 | bufsize = bufsize * 2; |
| 1097 | } |
| 1098 | |
| 1099 | return 0; |
| 1100 | |
| 1101 | dma_pool_setup_error: |
| 1102 | |
| 1103 | mraid_mm_teardown_dma_pools(adp); |
| 1104 | return (-ENOMEM); |
| 1105 | } |
| 1106 | |
| 1107 | |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1108 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | * mraid_mm_unregister_adp - Unregister routine for low level drivers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | * @unique_id : UID of the adpater |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1111 | * |
| 1112 | * Assumes no outstanding ioctls to llds. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | */ |
| 1114 | int |
| 1115 | mraid_mm_unregister_adp(uint32_t unique_id) |
| 1116 | { |
| 1117 | mraid_mmadp_t *adapter; |
| 1118 | mraid_mmadp_t *tmp; |
| 1119 | |
| 1120 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { |
| 1121 | |
| 1122 | |
| 1123 | if (adapter->unique_id == unique_id) { |
| 1124 | |
| 1125 | adapters_count_g--; |
| 1126 | |
| 1127 | list_del_init(&adapter->list); |
| 1128 | |
| 1129 | mraid_mm_free_adp_resources(adapter); |
| 1130 | |
| 1131 | kfree(adapter); |
| 1132 | |
| 1133 | con_log(CL_ANN, ( |
| 1134 | "megaraid cmm: Unregistered one adapter:%#x\n", |
| 1135 | unique_id)); |
| 1136 | |
| 1137 | return 0; |
| 1138 | } |
| 1139 | } |
| 1140 | |
| 1141 | return (-ENODEV); |
| 1142 | } |
| 1143 | |
| 1144 | /** |
| 1145 | * mraid_mm_free_adp_resources - Free adapter softstate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | * @adp : Adapter softstate |
| 1147 | */ |
| 1148 | static void |
| 1149 | mraid_mm_free_adp_resources(mraid_mmadp_t *adp) |
| 1150 | { |
| 1151 | uioc_t *kioc; |
| 1152 | int i; |
| 1153 | |
| 1154 | mraid_mm_teardown_dma_pools(adp); |
| 1155 | |
| 1156 | for (i = 0; i < adp->max_kioc; i++) { |
| 1157 | |
| 1158 | kioc = adp->kioc_list + i; |
| 1159 | |
| 1160 | pci_pool_free(adp->pthru_dma_pool, kioc->pthru32, |
| 1161 | kioc->pthru32_h); |
| 1162 | } |
| 1163 | |
| 1164 | kfree(adp->kioc_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | kfree(adp->mbox_list); |
| 1166 | |
| 1167 | pci_pool_destroy(adp->pthru_dma_pool); |
| 1168 | |
| 1169 | |
| 1170 | return; |
| 1171 | } |
| 1172 | |
| 1173 | |
| 1174 | /** |
| 1175 | * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | * @adp : Adapter softstate |
| 1177 | */ |
| 1178 | static void |
| 1179 | mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp) |
| 1180 | { |
| 1181 | int i; |
| 1182 | mm_dmapool_t *pool; |
| 1183 | |
| 1184 | for (i = 0; i < MAX_DMA_POOLS; i++) { |
| 1185 | |
| 1186 | pool = &adp->dma_pool_list[i]; |
| 1187 | |
| 1188 | if (pool->handle) { |
| 1189 | |
| 1190 | if (pool->vaddr) |
| 1191 | pci_pool_free(pool->handle, pool->vaddr, |
| 1192 | pool->paddr); |
| 1193 | |
| 1194 | pci_pool_destroy(pool->handle); |
| 1195 | pool->handle = NULL; |
| 1196 | } |
| 1197 | } |
| 1198 | |
| 1199 | return; |
| 1200 | } |
| 1201 | |
| 1202 | /** |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1203 | * mraid_mm_init - Module entry point |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | */ |
| 1205 | static int __init |
| 1206 | mraid_mm_init(void) |
| 1207 | { |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame] | 1208 | int err; |
| 1209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | // Announce the driver version |
| 1211 | con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n", |
| 1212 | LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION)); |
| 1213 | |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame] | 1214 | err = misc_register(&megaraid_mm_dev); |
| 1215 | if (err < 0) { |
| 1216 | con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n")); |
| 1217 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | } |
| 1219 | |
| 1220 | init_waitqueue_head(&wait_q); |
| 1221 | |
| 1222 | INIT_LIST_HEAD(&adapters_list_g); |
| 1223 | |
| 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | #ifdef CONFIG_COMPAT |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1229 | /** |
| 1230 | * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine |
| 1231 | * @filep : file operations pointer (ignored) |
| 1232 | * @cmd : ioctl command |
| 1233 | * @arg : user ioctl packet |
| 1234 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | static long |
| 1236 | mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd, |
| 1237 | unsigned long arg) |
| 1238 | { |
| 1239 | int err; |
Ju, Seokmann | 672b2d3 | 2005-05-16 18:32:17 -0400 | [diff] [blame] | 1240 | |
Arnd Bergmann | f4927c4 | 2010-04-27 00:24:01 +0200 | [diff] [blame] | 1241 | err = mraid_mm_ioctl(filep, cmd, arg); |
Ju, Seokmann | 672b2d3 | 2005-05-16 18:32:17 -0400 | [diff] [blame] | 1242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | return err; |
| 1244 | } |
| 1245 | #endif |
| 1246 | |
| 1247 | /** |
Randy Dunlap | a69b74d | 2007-01-05 22:41:48 -0800 | [diff] [blame] | 1248 | * mraid_mm_exit - Module exit point |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | */ |
| 1250 | static void __exit |
| 1251 | mraid_mm_exit(void) |
| 1252 | { |
| 1253 | con_log(CL_DLEVEL1 , ("exiting common mod\n")); |
| 1254 | |
Thomas Horsten | 90a95af | 2008-02-04 23:53:18 -0800 | [diff] [blame] | 1255 | misc_deregister(&megaraid_mm_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | module_init(mraid_mm_init); |
| 1259 | module_exit(mraid_mm_exit); |
| 1260 | |
| 1261 | /* vi: set ts=8 sw=8 tw=78: */ |