sound/pci/asihpi/hpioctl.c

   1 /*******************************************************************************
   2
   3     AudioScience HPI driver
   4     Copyright (C) 1997-2011  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 #include "hpicmn.h"
  29
  30 #include <linux/fs.h>
  31 #include <linux/slab.h>
  32 #include <linux/moduleparam.h>
  33 #include <asm/uaccess.h>
  34 #include <linux/pci.h>
  35 #include <linux/stringify.h>
  36 #include <linux/module.h>
  37
  38 #ifdef MODULE_FIRMWARE
  39 MODULE_FIRMWARE("asihpi/dsp5000.bin");
  40 MODULE_FIRMWARE("asihpi/dsp6200.bin");
  41 MODULE_FIRMWARE("asihpi/dsp6205.bin");
  42 MODULE_FIRMWARE("asihpi/dsp6400.bin");
  43 MODULE_FIRMWARE("asihpi/dsp6600.bin");
  44 MODULE_FIRMWARE("asihpi/dsp8700.bin");
  45 MODULE_FIRMWARE("asihpi/dsp8900.bin");
  46 #endif
  47
  48 static int prealloc_stream_buf;
  49 module_param(prealloc_stream_buf, int, S_IRUGO);
  50 MODULE_PARM_DESC(prealloc_stream_buf,
  51         "Preallocate size for per-adapter stream buffer");
  52
  53 /* Allow the debug level to be changed after module load.
  54  E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
  55 */
  56 module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
  57 MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
  58
  59 /* List of adapters found */
  60 static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
  61
  62 /* Wrapper function to HPI_Message to enable dumping of the
  63    message and response types.
  64 */
  65 static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
  66         struct file *file)
  67 {
  68         int adapter = phm->adapter_index;
  69
  70         if ((adapter >= HPI_MAX_ADAPTERS || adapter < 0)
  71                 && (phm->object != HPI_OBJ_SUBSYSTEM))
  72                 phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
  73         else
  74                 hpi_send_recv_ex(phm, phr, file);
  75 }
  76
  77 /* This is called from hpifunc.c functions, called by ALSA
  78  * (or other kernel process) In this case there is no file descriptor
  79  * available for the message cache code
  80  */
  81 void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
  82 {
  83         hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
  84 }
  85
  86 EXPORT_SYMBOL(hpi_send_recv);
  87 /* for radio-asihpi */
  88
  89 int asihpi_hpi_release(struct file *file)
  90 {
  91         struct hpi_message hm;
  92         struct hpi_response hr;
  93
  94 /* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
  95         /* close the subsystem just in case the application forgot to. */
  96         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
  97                 HPI_SUBSYS_CLOSE);
  98         hpi_send_recv_ex(&hm, &hr, file);
  99         return 0;
 100 }
 101
 102 long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 103 {
 104         struct hpi_ioctl_linux __user *phpi_ioctl_data;
 105         void __user *puhm;
 106         void __user *puhr;
 107         union hpi_message_buffer_v1 *hm;
 108         union hpi_response_buffer_v1 *hr;
 109         u16 res_max_size;
 110         u32 uncopied_bytes;
 111         int err = 0;
 112
 113         if (cmd != HPI_IOCTL_LINUX)
 114                 return -EINVAL;
 115
 116         hm = kmalloc(sizeof(*hm), GFP_KERNEL);
 117         hr = kmalloc(sizeof(*hr), GFP_KERNEL);
 118         if (!hm || !hr) {
 119                 err = -ENOMEM;
 120                 goto out;
 121         }
 122
 123         phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
 124
 125         /* Read the message and response pointers from user space.  */
 126         if (get_user(puhm, &phpi_ioctl_data->phm)
 127                 || get_user(puhr, &phpi_ioctl_data->phr)) {
 128                 err = -EFAULT;
 129                 goto out;
 130         }
 131
 132         /* Now read the message size and data from user space.  */
 133         if (get_user(hm->h.size, (u16 __user *)puhm)) {
 134                 err = -EFAULT;
 135                 goto out;
 136         }
 137         if (hm->h.size > sizeof(*hm))
 138                 hm->h.size = sizeof(*hm);
 139
 140         /* printk(KERN_INFO "message size %d\n", hm->h.wSize); */
 141
 142         uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
 143         if (uncopied_bytes) {
 144                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 145                 err = -EFAULT;
 146                 goto out;
 147         }
 148
 149         if (get_user(res_max_size, (u16 __user *)puhr)) {
 150                 err = -EFAULT;
 151                 goto out;
 152         }
 153         /* printk(KERN_INFO "user response size %d\n", res_max_size); */
 154         if (res_max_size < sizeof(struct hpi_response_header)) {
 155                 HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
 156                 err = -EFAULT;
 157                 goto out;
 158         }
 159
 160         switch (hm->h.function) {
 161         case HPI_SUBSYS_CREATE_ADAPTER:
 162         case HPI_ADAPTER_DELETE:
 163                 /* Application must not use these functions! */
 164                 hr->h.size = sizeof(hr->h);
 165                 hr->h.error = HPI_ERROR_INVALID_OPERATION;
 166                 hr->h.function = hm->h.function;
 167                 uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 168                 if (uncopied_bytes)
 169                         err = -EFAULT;
 170                 else
 171                         err = 0;
 172                 goto out;
 173         }
 174
 175         hr->h.size = res_max_size;
 176         if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
 177                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 178         } else {
 179                 u16 __user *ptr = NULL;
 180                 u32 size = 0;
 181                 u32 adapter_present;
 182                 /* -1=no data 0=read from user mem, 1=write to user mem */
 183                 int wrflag = -1;
 184                 struct hpi_adapter *pa;
 185
 186                 if (hm->h.adapter_index < HPI_MAX_ADAPTERS) {
 187                         pa = &adapters[hm->h.adapter_index];
 188                         adapter_present = pa->type;
 189                 } else {
 190                         adapter_present = 0;
 191                 }
 192
 193                 if (!adapter_present) {
 194                         hpi_init_response(&hr->r0, hm->h.object,
 195                                 hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);
 196
 197                         uncopied_bytes =
 198                                 copy_to_user(puhr, hr, sizeof(hr->h));
 199                         if (uncopied_bytes)
 200                                 err = -EFAULT;
 201                         else
 202                                 err = 0;
 203                         goto out;
 204                 }
 205
 206                 if (mutex_lock_interruptible(&pa->mutex)) {
 207                         err = -EINTR;
 208                         goto out;
 209                 }
 210
 211                 /* Dig out any pointers embedded in the message.  */
 212                 switch (hm->h.function) {
 213                 case HPI_OSTREAM_WRITE:
 214                 case HPI_ISTREAM_READ:{
 215                                 /* Yes, sparse, this is correct. */
 216                                 ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
 217                                 size = hm->m0.u.d.u.data.data_size;
 218
 219                                 /* Allocate buffer according to application request.
 220                                    ?Is it better to alloc/free for the duration
 221                                    of the transaction?
 222                                  */
 223                                 if (pa->buffer_size < size) {
 224                                         HPI_DEBUG_LOG(DEBUG,
 225                                                 "Realloc adapter %d stream "
 226                                                 "buffer from %zd to %d\n",
 227                                                 hm->h.adapter_index,
 228                                                 pa->buffer_size, size);
 229                                         if (pa->p_buffer) {
 230                                                 pa->buffer_size = 0;
 231                                                 vfree(pa->p_buffer);
 232                                         }
 233                                         pa->p_buffer = vmalloc(size);
 234                                         if (pa->p_buffer)
 235                                                 pa->buffer_size = size;
 236                                         else {
 237                                                 HPI_DEBUG_LOG(ERROR,
 238                                                         "HPI could not allocate "
 239                                                         "stream buffer size %d\n",
 240                                                         size);
 241
 242                                                 mutex_unlock(&pa->mutex);
 243                                                 err = -EINVAL;
 244                                                 goto out;
 245                                         }
 246                                 }
 247
 248                                 hm->m0.u.d.u.data.pb_data = pa->p_buffer;
 249                                 if (hm->h.function == HPI_ISTREAM_READ)
 250                                         /* from card, WRITE to user mem */
 251                                         wrflag = 1;
 252                                 else
 253                                         wrflag = 0;
 254                                 break;
 255                         }
 256
 257                 default:
 258                         size = 0;
 259                         break;
 260                 }
 261
 262                 if (size && (wrflag == 0)) {
 263                         uncopied_bytes =
 264                                 copy_from_user(pa->p_buffer, ptr, size);
 265                         if (uncopied_bytes)
 266                                 HPI_DEBUG_LOG(WARNING,
 267                                         "Missed %d of %d "
 268                                         "bytes from user\n", uncopied_bytes,
 269                                         size);
 270                 }
 271
 272                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 273
 274                 if (size && (wrflag == 1)) {
 275                         uncopied_bytes =
 276                                 copy_to_user(ptr, pa->p_buffer, size);
 277                         if (uncopied_bytes)
 278                                 HPI_DEBUG_LOG(WARNING,
 279                                         "Missed %d of %d " "bytes to user\n",
 280                                         uncopied_bytes, size);
 281                 }
 282
 283                 mutex_unlock(&pa->mutex);
 284         }
 285
 286         /* on return response size must be set */
 287         /*printk(KERN_INFO "response size %d\n", hr->h.wSize); */
 288
 289         if (!hr->h.size) {
 290                 HPI_DEBUG_LOG(ERROR, "response zero size\n");
 291                 err = -EFAULT;
 292                 goto out;
 293         }
 294
 295         if (hr->h.size > res_max_size) {
 296                 HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
 297                         res_max_size);
 298                 hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
 299                 hr->h.specific_error = hr->h.size;
 300                 hr->h.size = sizeof(hr->h);
 301         }
 302
 303         uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 304         if (uncopied_bytes) {
 305                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 306                 err = -EFAULT;
 307                 goto out;
 308         }
 309
 310 out:
 311         kfree(hm);
 312         kfree(hr);
 313         return err;
 314 }
 315
 316 int __devinit asihpi_adapter_probe(struct pci_dev *pci_dev,
 317         const struct pci_device_id *pci_id)
 318 {
 319         int idx, nm;
 320         unsigned int memlen;
 321         struct hpi_message hm;
 322         struct hpi_response hr;
 323         struct hpi_adapter adapter;
 324         struct hpi_pci pci;
 325
 326         memset(&adapter, 0, sizeof(adapter));
 327
 328         dev_printk(KERN_DEBUG, &pci_dev->dev,
 329                 "probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
 330                 pci_dev->device, pci_dev->subsystem_vendor,
 331                 pci_dev->subsystem_device, pci_dev->devfn);
 332
 333         if (pci_enable_device(pci_dev) < 0) {
 334                 dev_printk(KERN_ERR, &pci_dev->dev,
 335                         "pci_enable_device failed, disabling device\n");
 336                 return -EIO;
 337         }
 338
 339         pci_set_master(pci_dev);        /* also sets latency timer if < 16 */
 340
 341         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 342                 HPI_SUBSYS_CREATE_ADAPTER);
 343         hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
 344                 HPI_ERROR_PROCESSING_MESSAGE);
 345
 346         hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;
 347
 348         adapter.pci = pci_dev;
 349
 350         nm = HPI_MAX_ADAPTER_MEM_SPACES;
 351
 352         for (idx = 0; idx < nm; idx++) {
 353                 HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
 354                         &pci_dev->resource[idx]);
 355
 356                 if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
 357                         memlen = pci_resource_len(pci_dev, idx);
 358                         adapter.ap_remapped_mem_base[idx] =
 359                                 ioremap(pci_resource_start(pci_dev, idx),
 360                                 memlen);
 361                         if (!adapter.ap_remapped_mem_base[idx]) {
 362                                 HPI_DEBUG_LOG(ERROR,
 363                                         "ioremap failed, aborting\n");
 364                                 /* unmap previously mapped pci mem space */
 365                                 goto err;
 366                         }
 367                 }
 368
 369                 pci.ap_mem_base[idx] = adapter.ap_remapped_mem_base[idx];
 370         }
 371
 372         pci.pci_dev = pci_dev;
 373         hm.u.s.resource.bus_type = HPI_BUS_PCI;
 374         hm.u.s.resource.r.pci = &pci;
 375
 376         /* call CreateAdapterObject on the relevant hpi module */
 377         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 378         if (hr.error)
 379                 goto err;
 380
 381         if (prealloc_stream_buf) {
 382                 adapter.p_buffer = vmalloc(prealloc_stream_buf);
 383                 if (!adapter.p_buffer) {
 384                         HPI_DEBUG_LOG(ERROR,
 385                                 "HPI could not allocate "
 386                                 "kernel buffer size %d\n",
 387                                 prealloc_stream_buf);
 388                         goto err;
 389                 }
 390         }
 391
 392         adapter.index = hr.u.s.adapter_index;
 393         adapter.type = hr.u.s.adapter_type;
 394
 395         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 396                 HPI_ADAPTER_OPEN);
 397         hm.adapter_index = adapter.index;
 398         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 399
 400         if (hr.error)
 401                 goto err;
 402
 403         adapter.snd_card_asihpi = NULL;
 404         /* WARNING can't init mutex in 'adapter'
 405          * and then copy it to adapters[] ?!?!
 406          */
 407         adapters[adapter.index] = adapter;
 408         mutex_init(&adapters[adapter.index].mutex);
 409         pci_set_drvdata(pci_dev, &adapters[adapter.index]);
 410
 411         dev_printk(KERN_INFO, &pci_dev->dev,
 412                 "probe succeeded for ASI%04X HPI index %d\n", adapter.type,
 413                 adapter.index);
 414
 415         return 0;
 416
 417 err:
 418         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 419                 if (adapter.ap_remapped_mem_base[idx]) {
 420                         iounmap(adapter.ap_remapped_mem_base[idx]);
 421                         adapter.ap_remapped_mem_base[idx] = NULL;
 422                 }
 423         }
 424
 425         if (adapter.p_buffer) {
 426                 adapter.buffer_size = 0;
 427                 vfree(adapter.p_buffer);
 428         }
 429
 430         HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
 431         return -ENODEV;
 432 }
 433
 434 void __devexit asihpi_adapter_remove(struct pci_dev *pci_dev)
 435 {
 436         int idx;
 437         struct hpi_message hm;
 438         struct hpi_response hr;
 439         struct hpi_adapter *pa;
 440         pa = pci_get_drvdata(pci_dev);
 441
 442         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 443                 HPI_ADAPTER_DELETE);
 444         hm.adapter_index = pa->index;
 445         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 446
 447         /* unmap PCI memory space, mapped during device init. */
 448         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 449                 if (pa->ap_remapped_mem_base[idx]) {
 450                         iounmap(pa->ap_remapped_mem_base[idx]);
 451                         pa->ap_remapped_mem_base[idx] = NULL;
 452                 }
 453         }
 454
 455         if (pa->p_buffer)
 456                 vfree(pa->p_buffer);
 457
 458         pci_set_drvdata(pci_dev, NULL);
 459         if (1)
 460                 dev_printk(KERN_INFO, &pci_dev->dev,
 461                         "remove %04x:%04x,%04x:%04x,%04x," " HPI index %d.\n",
 462                         pci_dev->vendor, pci_dev->device,
 463                         pci_dev->subsystem_vendor, pci_dev->subsystem_device,
 464                         pci_dev->devfn, pa->index);
 465
 466         memset(pa, 0, sizeof(*pa));
 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 }