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         priv->proc = PVRSRVPerProcessData(pid);
  99         filp->private_data = priv;
 100
 101         INIT_LIST_HEAD(&priv->event_list);
 102         init_waitqueue_head(&priv->event_wait);
 103         priv->event_space = 4096; /* set aside 4k for event buffer */
 104
 105         ret = 0;
 106 err_unlock:
 107         pvr_unlock();
 108
 109         return ret;
 110 }
 111
 112 static int pvr_release(struct inode unref__ * inode, struct file *filp)
 113 {
 114         struct PVRSRV_FILE_PRIVATE_DATA *priv;
 115
 116         pvr_lock();
 117
 118         priv = filp->private_data;
 119
 120         pvr_release_events(priv);
 121
 122         PVRSRVProcessDisconnect(priv->ui32OpenPID);
 123
 124         OSFreeMem(PVRSRV_OS_NON_PAGEABLE_HEAP,
 125                   sizeof(*priv),
 126                   priv, priv->hBlockAlloc);
 127
 128         pvr_unlock();
 129
 130         return 0;
 131 }
 132
 133 static const struct file_operations pvr_fops = {
 134         .owner          = THIS_MODULE,
 135         .unlocked_ioctl = PVRSRV_BridgeDispatchKM,
 136         .open           = pvr_open,
 137         .release        = pvr_release,
 138         .mmap           = PVRMMap,
 139         .poll           = pvr_poll,
 140         .read           = pvr_read,
 141 };
 142
 143 static void pvr_shutdown(struct platform_device *pdev)
 144 {
 145         PVR_TRACE("pvr_shutdown(pdev=%p)", pdev);
 146
 147         (void)PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3);
 148 }
 149
 150 static int pvr_suspend(struct platform_device *pdev, pm_message_t state)
 151 {
 152         PVR_TRACE("pvr_suspend(pdev=%p)", pdev);
 153
 154         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3) != PVRSRV_OK)
 155                 return -EINVAL;
 156         return 0;
 157 }
 158
 159 static int pvr_resume(struct platform_device *pdev)
 160 {
 161         PVR_TRACE("pvr_resume(pdev=%p)", pdev);
 162
 163         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D0) != PVRSRV_OK)
 164                 return -EINVAL;
 165         return 0;
 166 }
 167
 168 static struct miscdevice pvr_miscdevice = {
 169         .minor = MISC_DYNAMIC_MINOR,
 170         .name = DRVNAME,
 171         .fops = &pvr_fops,
 172 };
 173
 174 static int __devinit pvr_probe(struct platform_device *pdev)
 175 {
 176         struct SYS_DATA *sysdata;
 177         int ret;
 178
 179         PVR_TRACE("pvr_probe(pdev=%p)", pdev);
 180
 181         if (SysAcquireData(&sysdata) != PVRSRV_OK &&
 182             SysInitialise(pdev) != PVRSRV_OK) {
 183                 ret = -ENODEV;
 184                 goto err_exit;
 185         }
 186
 187         ret = misc_register(&pvr_miscdevice);
 188         if (ret < 0)
 189                 goto err_exit;
 190
 191         return 0;
 192
 193 err_exit:
 194         dev_err(&pdev->dev, "probe failed (%d)\n", ret);
 195
 196         return ret;
 197 }
 198
 199 static int __devexit pvr_remove(struct platform_device *pdev)
 200 {
 201         struct SYS_DATA *sysdata;
 202         int ret;
 203
 204         PVR_TRACE("pvr_remove(pdev=%p)", pdev);
 205
 206         ret = misc_deregister(&pvr_miscdevice);
 207         if (ret < 0) {
 208                 dev_err(&pdev->dev, "remove failed (%d)\n", ret);
 209                 return ret;
 210         }
 211
 212         if (SysAcquireData(&sysdata) == PVRSRV_OK)
 213                 SysDeinitialise(sysdata);
 214
 215         return 0;
 216 }
 217
 218
 219 static struct platform_driver pvr_driver = {
 220         .driver = {
 221                    .name = DRVNAME,
 222         },
 223         .probe          = pvr_probe,
 224         .remove         = __devexit_p(pvr_remove),
 225         .suspend        = pvr_suspend,
 226         .resume         = pvr_resume,
 227         .shutdown       = pvr_shutdown,
 228 };
 229
 230 static int __init pvr_init(void)
 231 {
 232         int error;
 233
 234         pvr_dbg_init();
 235
 236         PVR_TRACE("pvr_init");
 237
 238 #ifdef CONFIG_PVR_DEBUG_EXTRA
 239         PVRDebugSetLevel(debug);
 240 #endif
 241
 242 #ifdef CONFIG_DEBUG_FS
 243         pvr_debugfs_init();
 244 #endif
 245
 246         error = CreateProcEntries();
 247         if (error < 0)
 248                 goto err1;
 249
 250         error = -ENOMEM;
 251         if (LinuxMMInit() != PVRSRV_OK)
 252                 goto err2;
 253
 254         if (LinuxBridgeInit() != PVRSRV_OK)
 255                 goto err3;
 256
 257         PVRMMapInit();
 258
 259         error = platform_driver_register(&pvr_driver);
 260         if (error < 0)
 261                 goto err4;
 262
 263         pvr_init_events();
 264
 265         return 0;
 266
 267 err4:
 268         PVRMMapCleanup();
 269         LinuxBridgeDeInit();
 270 err3:
 271         LinuxMMCleanup();
 272 err2:
 273         RemoveProcEntries();
 274 err1:
 275         pr_err("%s: failed (%d)\n", __func__, error);
 276
 277         return error;
 278 }
 279
 280 static void __exit pvr_cleanup(void)
 281 {
 282         PVR_TRACE("pvr_cleanup");
 283
 284         pvr_exit_events();
 285
 286         platform_driver_unregister(&pvr_driver);
 287
 288         PVRMMapCleanup();
 289         LinuxMMCleanup();
 290         LinuxBridgeDeInit();
 291         RemoveProcEntries();
 292
 293         PVR_TRACE("pvr_cleanup: unloading");
 294
 295 #ifdef CONFIG_DEBUG_FS
 296         pvr_debugfs_cleanup();
 297 #endif
 298         pvr_dbg_cleanup();
 299 }
 300
 301 module_init(pvr_init);
 302 module_exit(pvr_cleanup);
 303
 304 MODULE_SUPPORTED_DEVICE(DRVNAME);
 305 MODULE_ALIAS("platform:" DRVNAME);
 306