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 #ifdef CONFIG_DEBUG_FS
  58 #include "pvr_debugfs.h"
  59 #endif
  60
  61 #define DRVNAME         "pvrsrvkm"
  62
  63 #ifdef CONFIG_PVR_DEBUG_EXTRA
  64 static int debug = DBGPRIV_WARNING;
  65 #include <linux/moduleparam.h>
  66 module_param(debug, int, 0);
  67 #endif
  68
  69 static int pvr_open(struct inode unref__ * inode, struct file *filp)
  70 {
  71         struct PVRSRV_FILE_PRIVATE_DATA *priv;
  72         void *block_alloc;
  73         int ret = -ENOMEM;
  74         enum PVRSRV_ERROR err;
  75         u32 pid;
  76
  77         pvr_lock();
  78
  79         if (pvr_is_disabled()) {
  80                 ret = -ENODEV;
  81                 goto err_unlock;
  82         }
  83
  84         pid = OSGetCurrentProcessIDKM();
  85
  86         if (PVRSRVProcessConnect(pid) != PVRSRV_OK)
  87                 goto err_unlock;
  88
  89         err = OSAllocMem(PVRSRV_OS_NON_PAGEABLE_HEAP,
  90                             sizeof(*priv),
  91                             (void **)&priv, &block_alloc);
  92
  93         if (err != PVRSRV_OK)
  94                 goto err_unlock;
  95
  96         priv->ui32OpenPID = pid;
  97         priv->hBlockAlloc = block_alloc;
  98         filp->private_data = priv;
  99
 100         INIT_LIST_HEAD(&priv->event_list);
 101         init_waitqueue_head(&priv->event_wait);
 102         priv->event_space = 4096; /* set aside 4k for event buffer */
 103
 104         ret = 0;
 105 err_unlock:
 106         pvr_unlock();
 107
 108         return ret;
 109 }
 110
 111 static int pvr_release(struct inode unref__ * inode, struct file *filp)
 112 {
 113         struct PVRSRV_FILE_PRIVATE_DATA *priv;
 114
 115         pvr_lock();
 116
 117         priv = filp->private_data;
 118
 119         pvr_release_events(priv);
 120
 121         PVRSRVProcessDisconnect(priv->ui32OpenPID);
 122
 123         OSFreeMem(PVRSRV_OS_NON_PAGEABLE_HEAP,
 124                   sizeof(*priv),
 125                   priv, priv->hBlockAlloc);
 126
 127         pvr_unlock();
 128
 129         return 0;
 130 }
 131
 132 static const struct file_operations pvr_fops = {
 133         .owner          = THIS_MODULE,
 134         .unlocked_ioctl = PVRSRV_BridgeDispatchKM,
 135         .open           = pvr_open,
 136         .release        = pvr_release,
 137         .mmap           = PVRMMap,
 138         .poll           = pvr_poll,
 139         .read           = pvr_read,
 140 };
 141
 142 static void pvr_shutdown(struct platform_device *pdev)
 143 {
 144         PVR_TRACE("pvr_shutdown(pdev=%p)", pdev);
 145
 146         (void)PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3);
 147 }
 148
 149 static int pvr_suspend(struct platform_device *pdev, pm_message_t state)
 150 {
 151         PVR_TRACE("pvr_suspend(pdev=%p)", pdev);
 152
 153         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3) != PVRSRV_OK)
 154                 return -EINVAL;
 155         return 0;
 156 }
 157
 158 static int pvr_resume(struct platform_device *pdev)
 159 {
 160         PVR_TRACE("pvr_resume(pdev=%p)", pdev);
 161
 162         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D0) != PVRSRV_OK)
 163                 return -EINVAL;
 164         return 0;
 165 }
 166
 167 static struct miscdevice pvr_miscdevice = {
 168         .minor = MISC_DYNAMIC_MINOR,
 169         .name = DRVNAME,
 170         .fops = &pvr_fops,
 171 };
 172
 173 static int __devinit pvr_probe(struct platform_device *pdev)
 174 {
 175         struct SYS_DATA *sysdata;
 176         int ret;
 177
 178         PVR_TRACE("pvr_probe(pdev=%p)", pdev);
 179
 180         if (SysAcquireData(&sysdata) != PVRSRV_OK &&
 181             SysInitialise(pdev) != PVRSRV_OK) {
 182                 ret = -ENODEV;
 183                 goto err_exit;
 184         }
 185
 186         ret = misc_register(&pvr_miscdevice);
 187         if (ret < 0)
 188                 goto err_exit;
 189
 190         return 0;
 191
 192 err_exit:
 193         dev_err(&pdev->dev, "probe failed (%d)\n", ret);
 194
 195         return ret;
 196 }
 197
 198 static int __devexit pvr_remove(struct platform_device *pdev)
 199 {
 200         struct SYS_DATA *sysdata;
 201         int ret;
 202
 203         PVR_TRACE("pvr_remove(pdev=%p)", pdev);
 204
 205         ret = misc_deregister(&pvr_miscdevice);
 206         if (ret < 0) {
 207                 dev_err(&pdev->dev, "remove failed (%d)\n", ret);
 208                 return ret;
 209         }
 210
 211         if (SysAcquireData(&sysdata) == PVRSRV_OK)
 212                 SysDeinitialise(sysdata);
 213
 214         return 0;
 215 }
 216
 217
 218 static struct platform_driver pvr_driver = {
 219         .driver = {
 220                    .name = DRVNAME,
 221         },
 222         .probe          = pvr_probe,
 223         .remove         = __devexit_p(pvr_remove),
 224         .suspend        = pvr_suspend,
 225         .resume         = pvr_resume,
 226         .shutdown       = pvr_shutdown,
 227 };
 228
 229 static int __init pvr_init(void)
 230 {
 231         int error;
 232
 233         pvr_dbg_init();
 234
 235         PVR_TRACE("pvr_init");
 236
 237 #ifdef CONFIG_PVR_DEBUG_EXTRA
 238         PVRDebugSetLevel(debug);
 239 #endif
 240
 241 #ifdef CONFIG_DEBUG_FS
 242         pvr_debugfs_init();
 243 #endif
 244
 245         error = CreateProcEntries();
 246         if (error < 0)
 247                 goto err1;
 248
 249         error = -ENOMEM;
 250         if (LinuxMMInit() != PVRSRV_OK)
 251                 goto err2;
 252
 253         if (LinuxBridgeInit() != PVRSRV_OK)
 254                 goto err3;
 255
 256         PVRMMapInit();
 257
 258         error = platform_driver_register(&pvr_driver);
 259         if (error < 0)
 260                 goto err4;
 261
 262         pvr_init_events();
 263
 264         return 0;
 265
 266 err4:
 267         PVRMMapCleanup();
 268         LinuxBridgeDeInit();
 269 err3:
 270         LinuxMMCleanup();
 271 err2:
 272         RemoveProcEntries();
 273 err1:
 274         pr_err("%s: failed (%d)\n", __func__, error);
 275
 276         return error;
 277 }
 278
 279 static void __exit pvr_cleanup(void)
 280 {
 281         PVR_TRACE("pvr_cleanup");
 282
 283         pvr_exit_events();
 284
 285         platform_driver_unregister(&pvr_driver);
 286
 287         PVRMMapCleanup();
 288         LinuxMMCleanup();
 289         LinuxBridgeDeInit();
 290         RemoveProcEntries();
 291
 292         PVR_TRACE("pvr_cleanup: unloading");
 293
 294 #ifdef CONFIG_DEBUG_FS
 295         pvr_debugfs_cleanup();
 296 #endif
 297         pvr_dbg_cleanup();
 298 }
 299
 300 module_init(pvr_init);
 301 module_exit(pvr_cleanup);
 302
 303 MODULE_SUPPORTED_DEVICE(DRVNAME);
 304 MODULE_ALIAS("platform:" DRVNAME);
 305