sound/pci/asihpi/hpioctl.c

   1 /*******************************************************************************
   2
   3     AudioScience HPI driver
   4     Copyright (C) 1997-2010  AudioScience Inc. <support@audioscience.com>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of version 2 of the GNU General Public License as
   8     published by the Free Software Foundation;
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18
  19 Common Linux HPI ioctl and module probe/remove functions
  20 *******************************************************************************/
  21 #define SOURCEFILE_NAME "hpioctl.c"
  22
  23 #include "hpi_internal.h"
  24 #include "hpimsginit.h"
  25 #include "hpidebug.h"
  26 #include "hpimsgx.h"
  27 #include "hpioctl.h"
  28
  29 #include <linux/fs.h>
  30 #include <linux/slab.h>
  31 #include <linux/moduleparam.h>
  32 #include <asm/uaccess.h>
  33 #include <linux/stringify.h>
  34
  35 #ifdef MODULE_FIRMWARE
  36 MODULE_FIRMWARE("asihpi/dsp5000.bin");
  37 MODULE_FIRMWARE("asihpi/dsp6200.bin");
  38 MODULE_FIRMWARE("asihpi/dsp6205.bin");
  39 MODULE_FIRMWARE("asihpi/dsp6400.bin");
  40 MODULE_FIRMWARE("asihpi/dsp6600.bin");
  41 MODULE_FIRMWARE("asihpi/dsp8700.bin");
  42 MODULE_FIRMWARE("asihpi/dsp8900.bin");
  43 #endif
  44
  45 static int prealloc_stream_buf;
  46 module_param(prealloc_stream_buf, int, S_IRUGO);
  47 MODULE_PARM_DESC(prealloc_stream_buf,
  48         "preallocate size for per-adapter stream buffer");
  49
  50 /* Allow the debug level to be changed after module load.
  51  E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
  52 */
  53 module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
  54 MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
  55
  56 /* List of adapters found */
  57 static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
  58
  59 /* Wrapper function to HPI_Message to enable dumping of the
  60    message and response types.
  61 */
  62 static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
  63         struct file *file)
  64 {
  65         int adapter = phm->adapter_index;
  66
  67         if ((adapter >= HPI_MAX_ADAPTERS || adapter < 0)
  68                 && (phm->object != HPI_OBJ_SUBSYSTEM))
  69                 phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
  70         else
  71                 hpi_send_recv_ex(phm, phr, file);
  72 }
  73
  74 /* This is called from hpifunc.c functions, called by ALSA
  75  * (or other kernel process) In this case there is no file descriptor
  76  * available for the message cache code
  77  */
  78 void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
  79 {
  80         hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
  81 }
  82
  83 EXPORT_SYMBOL(hpi_send_recv);
  84 /* for radio-asihpi */
  85
  86 int asihpi_hpi_release(struct file *file)
  87 {
  88         struct hpi_message hm;
  89         struct hpi_response hr;
  90
  91 /* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
  92         /* close the subsystem just in case the application forgot to. */
  93         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
  94                 HPI_SUBSYS_CLOSE);
  95         hpi_send_recv_ex(&hm, &hr, file);
  96         return 0;
  97 }
  98
  99 long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 100 {
 101         struct hpi_ioctl_linux __user *phpi_ioctl_data;
 102         void __user *puhm;
 103         void __user *puhr;
 104         union hpi_message_buffer_v1 *hm;
 105         union hpi_response_buffer_v1 *hr;
 106         u16 res_max_size;
 107         u32 uncopied_bytes;
 108         struct hpi_adapter *pa = NULL;
 109         int err = 0;
 110
 111         if (cmd != HPI_IOCTL_LINUX)
 112                 return -EINVAL;
 113
 114         hm = kmalloc(sizeof(*hm), GFP_KERNEL);
 115         hr = kmalloc(sizeof(*hr), GFP_KERNEL);
 116         if (!hm || !hr) {
 117                 err = -ENOMEM;
 118                 goto out;
 119         }
 120
 121         phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
 122
 123         /* Read the message and response pointers from user space.  */
 124         if (get_user(puhm, &phpi_ioctl_data->phm) ||
 125             get_user(puhr, &phpi_ioctl_data->phr)) {
 126                 err = -EFAULT;
 127                 goto out;
 128         }
 129
 130         /* Now read the message size and data from user space.  */
 131         if (get_user(hm->h.size, (u16 __user *)puhm)) {
 132                 err = -EFAULT;
 133                 goto out;
 134         }
 135         if (hm->h.size > sizeof(*hm))
 136                 hm->h.size = sizeof(*hm);
 137
 138         /*printk(KERN_INFO "message size %d\n", hm->h.wSize); */
 139
 140         uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
 141         if (uncopied_bytes) {
 142                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 143                 err = -EFAULT;
 144                 goto out;
 145         }
 146
 147         if (get_user(res_max_size, (u16 __user *)puhr)) {
 148                 err = -EFAULT;
 149                 goto out;
 150         }
 151         /* printk(KERN_INFO "user response size %d\n", res_max_size); */
 152         if (res_max_size < sizeof(struct hpi_response_header)) {
 153                 HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
 154                 err = -EFAULT;
 155                 goto out;
 156         }
 157
 158         pa = &adapters[hm->h.adapter_index];
 159         hr->h.size = 0;
 160         if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
 161                 switch (hm->h.function) {
 162                 case HPI_SUBSYS_CREATE_ADAPTER:
 163                 case HPI_SUBSYS_DELETE_ADAPTER:
 164                         /* Application must not use these functions! */
 165                         hr->h.size = sizeof(hr->h);
 166                         hr->h.error = HPI_ERROR_INVALID_OPERATION;
 167                         hr->h.function = hm->h.function;
 168                         uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 169                         if (uncopied_bytes)
 170                                 err = -EFAULT;
 171                         else
 172                                 err = 0;
 173                         goto out;
 174
 175                 default:
 176                         hpi_send_recv_f(&hm->m0, &hr->r0, file);
 177                 }
 178         } else {
 179                 u16 __user *ptr = NULL;
 180                 u32 size = 0;
 181
 182                 /* -1=no data 0=read from user mem, 1=write to user mem */
 183                 int wrflag = -1;
 184                 u32 adapter = hm->h.adapter_index;
 185
 186                 if ((hm->h.adapter_index > HPI_MAX_ADAPTERS) || (!pa->type)) {
 187                         hpi_init_response(&hr->r0, HPI_OBJ_ADAPTER,
 188                                 HPI_ADAPTER_OPEN,
 189                                 HPI_ERROR_BAD_ADAPTER_NUMBER);
 190
 191                         uncopied_bytes =
 192                                 copy_to_user(puhr, hr, sizeof(hr->h));
 193                         if (uncopied_bytes)
 194                                 err = -EFAULT;
 195                         else
 196                                 err = 0;
 197                         goto out;
 198                 }
 199
 200                 if (mutex_lock_interruptible(&adapters[adapter].mutex)) {
 201                         err = -EINTR;
 202                         goto out;
 203                 }
 204
 205                 /* Dig out any pointers embedded in the message.  */
 206                 switch (hm->h.function) {
 207                 case HPI_OSTREAM_WRITE:
 208                 case HPI_ISTREAM_READ:{
 209                                 /* Yes, sparse, this is correct. */
 210                                 ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
 211                                 size = hm->m0.u.d.u.data.data_size;
 212
 213                                 /* Allocate buffer according to application request.
 214                                    ?Is it better to alloc/free for the duration
 215                                    of the transaction?
 216                                  */
 217                                 if (pa->buffer_size < size) {
 218                                         HPI_DEBUG_LOG(DEBUG,
 219                                                 "realloc adapter %d stream "
 220                                                 "buffer from %zd to %d\n",
 221                                                 hm->h.adapter_index,
 222                                                 pa->buffer_size, size);
 223                                         if (pa->p_buffer) {
 224                                                 pa->buffer_size = 0;
 225                                                 vfree(pa->p_buffer);
 226                                         }
 227                                         pa->p_buffer = vmalloc(size);
 228                                         if (pa->p_buffer)
 229                                                 pa->buffer_size = size;
 230                                         else {
 231                                                 HPI_DEBUG_LOG(ERROR,
 232                                                         "HPI could not allocate "
 233                                                         "stream buffer size %d\n",
 234                                                         size);
 235
 236                                                 mutex_unlock(&adapters
 237                                                         [adapter].mutex);
 238                                                 err = -EINVAL;
 239                                                 goto out;
 240                                         }
 241                                 }
 242
 243                                 hm->m0.u.d.u.data.pb_data = pa->p_buffer;
 244                                 if (hm->h.function == HPI_ISTREAM_READ)
 245                                         /* from card, WRITE to user mem */
 246                                         wrflag = 1;
 247                                 else
 248                                         wrflag = 0;
 249                                 break;
 250                         }
 251
 252                 default:
 253                         size = 0;
 254                         break;
 255                 }
 256
 257                 if (size && (wrflag == 0)) {
 258                         uncopied_bytes =
 259                                 copy_from_user(pa->p_buffer, ptr, size);
 260                         if (uncopied_bytes)
 261                                 HPI_DEBUG_LOG(WARNING,
 262                                         "missed %d of %d "
 263                                         "bytes from user\n", uncopied_bytes,
 264                                         size);
 265                 }
 266
 267                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 268
 269                 if (size && (wrflag == 1)) {
 270                         uncopied_bytes =
 271                                 copy_to_user(ptr, pa->p_buffer, size);
 272                         if (uncopied_bytes)
 273                                 HPI_DEBUG_LOG(WARNING,
 274                                         "missed %d of %d " "bytes to user\n",
 275                                         uncopied_bytes, size);
 276                 }
 277
 278                 mutex_unlock(&adapters[adapter].mutex);
 279         }
 280
 281         /* on return response size must be set */
 282         /*printk(KERN_INFO "response size %d\n", hr->h.wSize); */
 283
 284         if (!hr->h.size) {
 285                 HPI_DEBUG_LOG(ERROR, "response zero size\n");
 286                 err = -EFAULT;
 287                 goto out;
 288         }
 289
 290         if (hr->h.size > res_max_size) {
 291                 HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
 292                         res_max_size);
 293                 /*HPI_DEBUG_MESSAGE(ERROR, hm); */
 294                 err = -EFAULT;
 295                 goto out;
 296         }
 297
 298         uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 299         if (uncopied_bytes) {
 300                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 301                 err = -EFAULT;
 302                 goto out;
 303         }
 304
 305 out:
 306         kfree(hm);
 307         kfree(hr);
 308         return err;
 309 }
 310
 311 int __devinit asihpi_adapter_probe(struct pci_dev *pci_dev,
 312         const struct pci_device_id *pci_id)
 313 {
 314         int err, idx, nm;
 315         unsigned int memlen;
 316         struct hpi_message hm;
 317         struct hpi_response hr;
 318         struct hpi_adapter adapter;
 319         struct hpi_pci pci;
 320
 321         memset(&adapter, 0, sizeof(adapter));
 322
 323         printk(KERN_DEBUG "probe PCI device (%04x:%04x,%04x:%04x,%04x)\n",
 324                 pci_dev->vendor, pci_dev->device, pci_dev->subsystem_vendor,
 325                 pci_dev->subsystem_device, pci_dev->devfn);
 326
 327         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 328                 HPI_SUBSYS_CREATE_ADAPTER);
 329         hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
 330                 HPI_ERROR_PROCESSING_MESSAGE);
 331
 332         hm.adapter_index = -1;  /* an invalid index */
 333
 334         /* fill in HPI_PCI information from kernel provided information */
 335         adapter.pci = pci_dev;
 336
 337         nm = HPI_MAX_ADAPTER_MEM_SPACES;
 338
 339         for (idx = 0; idx < nm; idx++) {
 340                 HPI_DEBUG_LOG(INFO, "resource %d %s %08llx-%08llx %04llx\n",
 341                         idx, pci_dev->resource[idx].name,
 342                         (unsigned long long)pci_resource_start(pci_dev, idx),
 343                         (unsigned long long)pci_resource_end(pci_dev, idx),
 344                         (unsigned long long)pci_resource_flags(pci_dev, idx));
 345
 346                 if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
 347                         memlen = pci_resource_len(pci_dev, idx);
 348                         adapter.ap_remapped_mem_base[idx] =
 349                                 ioremap(pci_resource_start(pci_dev, idx),
 350                                 memlen);
 351                         if (!adapter.ap_remapped_mem_base[idx]) {
 352                                 HPI_DEBUG_LOG(ERROR,
 353                                         "ioremap failed, aborting\n");
 354                                 /* unmap previously mapped pci mem space */
 355                                 goto err;
 356                         }
 357                 }
 358
 359                 pci.ap_mem_base[idx] = adapter.ap_remapped_mem_base[idx];
 360         }
 361
 362         /* could replace Pci with direct pointer to pci_dev for linux
 363            Instead wrap accessor functions for IDs etc.
 364            Would it work for windows?
 365          */
 366         pci.bus_number = pci_dev->bus->number;
 367         pci.vendor_id = (u16)pci_dev->vendor;
 368         pci.device_id = (u16)pci_dev->device;
 369         pci.subsys_vendor_id = (u16)(pci_dev->subsystem_vendor & 0xffff);
 370         pci.subsys_device_id = (u16)(pci_dev->subsystem_device & 0xffff);
 371         pci.device_number = pci_dev->devfn;
 372         pci.interrupt = pci_dev->irq;
 373         pci.p_os_data = pci_dev;
 374
 375         hm.u.s.resource.bus_type = HPI_BUS_PCI;
 376         hm.u.s.resource.r.pci = &pci;
 377
 378         /* call CreateAdapterObject on the relevant hpi module */
 379         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 380         if (hr.error)
 381                 goto err;
 382
 383         if (prealloc_stream_buf) {
 384                 adapter.p_buffer = vmalloc(prealloc_stream_buf);
 385                 if (!adapter.p_buffer) {
 386                         HPI_DEBUG_LOG(ERROR,
 387                                 "HPI could not allocate "
 388                                 "kernel buffer size %d\n",
 389                                 prealloc_stream_buf);
 390                         goto err;
 391                 }
 392         }
 393
 394         adapter.index = hr.u.s.adapter_index;
 395         adapter.type = hr.u.s.aw_adapter_list[adapter.index];
 396         hm.adapter_index = adapter.index;
 397
 398         err = hpi_adapter_open(NULL, adapter.index);
 399         if (err)
 400                 goto err;
 401
 402         adapter.snd_card_asihpi = NULL;
 403         /* WARNING can't init mutex in 'adapter'
 404          * and then copy it to adapters[] ?!?!
 405          */
 406         adapters[hr.u.s.adapter_index] = adapter;
 407         mutex_init(&adapters[adapter.index].mutex);
 408         pci_set_drvdata(pci_dev, &adapters[adapter.index]);
 409
 410         printk(KERN_INFO "probe found adapter ASI%04X HPI index #%d.\n",
 411                 adapter.type, adapter.index);
 412
 413         return 0;
 414
 415 err:
 416         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 417                 if (adapter.ap_remapped_mem_base[idx]) {
 418                         iounmap(adapter.ap_remapped_mem_base[idx]);
 419                         adapter.ap_remapped_mem_base[idx] = NULL;
 420                 }
 421         }
 422
 423         if (adapter.p_buffer) {
 424                 adapter.buffer_size = 0;
 425                 vfree(adapter.p_buffer);
 426         }
 427
 428         HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
 429         return -ENODEV;
 430 }
 431
 432 void __devexit asihpi_adapter_remove(struct pci_dev *pci_dev)
 433 {
 434         int idx;
 435         struct hpi_message hm;
 436         struct hpi_response hr;
 437         struct hpi_adapter *pa;
 438         pa = pci_get_drvdata(pci_dev);
 439
 440         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 441                 HPI_SUBSYS_DELETE_ADAPTER);
 442         hm.adapter_index = pa->index;
 443         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 444
 445         /* unmap PCI memory space, mapped during device init. */
 446         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 447                 if (pa->ap_remapped_mem_base[idx]) {
 448                         iounmap(pa->ap_remapped_mem_base[idx]);
 449                         pa->ap_remapped_mem_base[idx] = NULL;
 450                 }
 451         }
 452
 453         if (pa->p_buffer) {
 454                 pa->buffer_size = 0;
 455                 vfree(pa->p_buffer);
 456         }
 457
 458         pci_set_drvdata(pci_dev, NULL);
 459         /*
 460            printk(KERN_INFO "PCI device (%04x:%04x,%04x:%04x,%04x),"
 461            " HPI index # %d, removed.\n",
 462            pci_dev->vendor, pci_dev->device,
 463            pci_dev->subsystem_vendor,
 464            pci_dev->subsystem_device, pci_dev->devfn,
 465            pa->index);
 466          */
 467 }
 468
 469 void __init asihpi_init(void)
 470 {
 471         struct hpi_message hm;
 472         struct hpi_response hr;
 473
 474         memset(adapters, 0, sizeof(adapters));
 475
 476         printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");
 477
 478         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 479                 HPI_SUBSYS_DRIVER_LOAD);
 480         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 481 }
 482
 483 void asihpi_exit(void)
 484 {
 485         struct hpi_message hm;
 486         struct hpi_response hr;
 487
 488         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 489                 HPI_SUBSYS_DRIVER_UNLOAD);
 490         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 491 }