pvr/module.c

   1 /**********************************************************************
   2  *
   3  * Copyright(c) 2008 Imagination Technologies Ltd. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful but, except
  10  * as otherwise stated in writing, without any warranty; without even the
  11  * implied warranty of merchantability or fitness for a particular purpose.
  12  * See the GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * Imagination Technologies Ltd. <gpl-support@imgtec.com>
  23  * Home Park Estate, Kings Langley, Herts, WD4 8LZ, UK
  24  *
  25  ******************************************************************************/
  26
  27 #include <linux/init.h>
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/version.h>
  31 #include <linux/fs.h>
  32 #include <linux/proc_fs.h>
  33 #include <linux/miscdevice.h>
  34
  35 #include <linux/platform_device.h>
  36
  37 #include "img_defs.h"
  38 #include "services.h"
  39 #include "kerneldisplay.h"
  40 #include "kernelbuffer.h"
  41 #include "syscommon.h"
  42 #include "pvrmmap.h"
  43 #include "mutils.h"
  44 #include "mm.h"
  45 #include "mmap.h"
  46 #include "pvr_debug.h"
  47 #include "srvkm.h"
  48 #include "perproc.h"
  49 #include "handle.h"
  50 #include "pvr_bridge_km.h"
  51 #include "sgx_bridge_km.h"
  52 #include "proc.h"
  53 #include "pvrmodule.h"
  54 #include "private_data.h"
  55 #include "pvr_events.h"
  56
  57 #define DRVNAME         "pvrsrvkm"
  58
  59 #ifdef CONFIG_PVR_DEBUG_EXTRA
  60 static int debug = DBGPRIV_WARNING;
  61 #include <linux/moduleparam.h>
  62 module_param(debug, int, 0);
  63 #endif
  64
  65 static int pvr_open(struct inode unref__ * inode, struct file *filp)
  66 {
  67         struct PVRSRV_FILE_PRIVATE_DATA *priv;
  68         void *block_alloc;
  69         int ret = -ENOMEM;
  70         enum PVRSRV_ERROR err;
  71         u32 pid;
  72
  73         pvr_lock();
  74
  75         pid = OSGetCurrentProcessIDKM();
  76
  77         if (PVRSRVProcessConnect(pid) != PVRSRV_OK)
  78                 goto err_unlock;
  79
  80         err = OSAllocMem(PVRSRV_OS_NON_PAGEABLE_HEAP,
  81                             sizeof(*priv),
  82                             (void **)&priv, &block_alloc);
  83
  84         if (err != PVRSRV_OK)
  85                 goto err_unlock;
  86
  87         priv->ui32OpenPID = pid;
  88         priv->hBlockAlloc = block_alloc;
  89         filp->private_data = priv;
  90
  91         INIT_LIST_HEAD(&priv->event_list);
  92         init_waitqueue_head(&priv->event_wait);
  93         priv->event_space = 4096; /* set aside 4k for event buffer */
  94
  95         ret = 0;
  96 err_unlock:
  97         pvr_unlock();
  98
  99         return ret;
 100 }
 101
 102 static int pvr_release(struct inode unref__ * inode, struct file *filp)
 103 {
 104         struct PVRSRV_FILE_PRIVATE_DATA *priv;
 105
 106         pvr_lock();
 107
 108         priv = filp->private_data;
 109
 110         pvr_release_events(priv);
 111
 112         PVRSRVProcessDisconnect(priv->ui32OpenPID);
 113
 114         OSFreeMem(PVRSRV_OS_NON_PAGEABLE_HEAP,
 115                   sizeof(*priv),
 116                   priv, priv->hBlockAlloc);
 117
 118         pvr_unlock();
 119
 120         return 0;
 121 }
 122
 123 static const struct file_operations pvr_fops = {
 124         .owner          = THIS_MODULE,
 125         .unlocked_ioctl = PVRSRV_BridgeDispatchKM,
 126         .open           = pvr_open,
 127         .release        = pvr_release,
 128         .mmap           = PVRMMap,
 129         .poll           = pvr_poll,
 130         .read           = pvr_read,
 131 };
 132
 133 static void pvr_shutdown(struct platform_device *pdev)
 134 {
 135         PVR_TRACE("pvr_shutdown(pdev=%p)", pdev);
 136
 137         (void)PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3);
 138 }
 139
 140 static int pvr_suspend(struct platform_device *pdev, pm_message_t state)
 141 {
 142         PVR_TRACE("pvr_suspend(pdev=%p)", pdev);
 143
 144         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3) != PVRSRV_OK)
 145                 return -EINVAL;
 146         return 0;
 147 }
 148
 149 static int pvr_resume(struct platform_device *pdev)
 150 {
 151         PVR_TRACE("pvr_resume(pdev=%p)", pdev);
 152
 153         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D0) != PVRSRV_OK)
 154                 return -EINVAL;
 155         return 0;
 156 }
 157
 158 static struct miscdevice pvr_miscdevice = {
 159         .minor = MISC_DYNAMIC_MINOR,
 160         .name = DRVNAME,
 161         .fops = &pvr_fops,
 162 };
 163
 164 static int __devinit pvr_probe(struct platform_device *pdev)
 165 {
 166         struct SYS_DATA *sysdata;
 167         int ret;
 168
 169         PVR_TRACE("pvr_probe(pdev=%p)", pdev);
 170
 171         if (SysAcquireData(&sysdata) != PVRSRV_OK &&
 172             SysInitialise(pdev) != PVRSRV_OK) {
 173                 ret = -ENODEV;
 174                 goto err_exit;
 175         }
 176
 177         ret = misc_register(&pvr_miscdevice);
 178         if (ret < 0)
 179                 goto err_exit;
 180
 181         return 0;
 182
 183 err_exit:
 184         dev_err(&pdev->dev, "probe failed (%d)\n", ret);
 185
 186         return ret;
 187 }
 188
 189 static int __devexit pvr_remove(struct platform_device *pdev)
 190 {
 191         struct SYS_DATA *sysdata;
 192         int ret;
 193
 194         PVR_TRACE("pvr_remove(pdev=%p)", pdev);
 195
 196         ret = misc_deregister(&pvr_miscdevice);
 197         if (ret < 0) {
 198                 dev_err(&pdev->dev, "remove failed (%d)\n", ret);
 199                 return ret;
 200         }
 201
 202         if (SysAcquireData(&sysdata) == PVRSRV_OK)
 203                 SysDeinitialise(sysdata);
 204
 205         return 0;
 206 }
 207
 208
 209 static struct platform_driver pvr_driver = {
 210         .driver = {
 211                    .name = DRVNAME,
 212         },
 213         .probe          = pvr_probe,
 214         .remove         = __devexit_p(pvr_remove),
 215         .suspend        = pvr_suspend,
 216         .resume         = pvr_resume,
 217         .shutdown       = pvr_shutdown,
 218 };
 219
 220 static int __init pvr_init(void)
 221 {
 222         int error;
 223
 224         pvr_dbg_init();
 225
 226         PVR_TRACE("pvr_init");
 227
 228 #ifdef CONFIG_PVR_DEBUG_EXTRA
 229         PVRDebugSetLevel(debug);
 230 #endif
 231
 232         error = CreateProcEntries();
 233         if (error < 0)
 234                 goto err1;
 235
 236         error = -ENOMEM;
 237         if (LinuxMMInit() != PVRSRV_OK)
 238                 goto err2;
 239
 240         if (LinuxBridgeInit() != PVRSRV_OK)
 241                 goto err3;
 242
 243         PVRMMapInit();
 244
 245         error = platform_driver_register(&pvr_driver);
 246         if (error < 0)
 247                 goto err4;
 248
 249         pvr_init_events();
 250
 251         return 0;
 252
 253 err4:
 254         PVRMMapCleanup();
 255         LinuxBridgeDeInit();
 256 err3:
 257         LinuxMMCleanup();
 258 err2:
 259         RemoveProcEntries();
 260 err1:
 261         pr_err("%s: failed (%d)\n", __func__, error);
 262
 263         return error;
 264 }
 265
 266 static void __exit pvr_cleanup(void)
 267 {
 268         struct SYS_DATA *sysdata;
 269
 270         PVR_TRACE("pvr_cleanup");
 271
 272         SysAcquireData(&sysdata);
 273
 274         platform_driver_unregister(&pvr_driver);
 275
 276         PVRMMapCleanup();
 277         LinuxMMCleanup();
 278         LinuxBridgeDeInit();
 279         RemoveProcEntries();
 280
 281         PVR_TRACE("pvr_cleanup: unloading");
 282
 283         pvr_dbg_cleanup();
 284 }
 285
 286 module_init(pvr_init);
 287 module_exit(pvr_cleanup);
 288
 289 MODULE_SUPPORTED_DEVICE(DRVNAME);
 290 MODULE_ALIAS("platform:" DRVNAME);
 291