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
  56 #define DRVNAME         "pvrsrvkm"
  57
  58 #ifdef CONFIG_PVR_DEBUG_EXTRA
  59 static int debug = DBGPRIV_WARNING;
  60 #include <linux/moduleparam.h>
  61 module_param(debug, int, 0);
  62 #endif
  63
  64 static int pvr_open(struct inode unref__ * inode, struct file *filp)
  65 {
  66         struct PVRSRV_FILE_PRIVATE_DATA *priv;
  67         void *block_alloc;
  68         int ret = -ENOMEM;
  69         enum PVRSRV_ERROR err;
  70         u32 pid;
  71
  72         pvr_lock();
  73
  74         pid = OSGetCurrentProcessIDKM();
  75
  76         if (PVRSRVProcessConnect(pid) != PVRSRV_OK)
  77                 goto err_unlock;
  78
  79         err = OSAllocMem(PVRSRV_OS_NON_PAGEABLE_HEAP,
  80                             sizeof(*priv),
  81                             (void **)&priv, &block_alloc);
  82
  83         if (err != PVRSRV_OK)
  84                 goto err_unlock;
  85
  86         priv->ui32OpenPID = pid;
  87         priv->hBlockAlloc = block_alloc;
  88         filp->private_data = priv;
  89
  90         INIT_LIST_HEAD(&priv->event_list);
  91         init_waitqueue_head(&priv->event_wait);
  92         priv->event_space = 4096; /* set aside 4k for event buffer */
  93
  94         ret = 0;
  95 err_unlock:
  96         pvr_unlock();
  97
  98         return ret;
  99 }
 100
 101 static int pvr_release(struct inode unref__ * inode, struct file *filp)
 102 {
 103         struct PVRSRV_FILE_PRIVATE_DATA *priv;
 104
 105         pvr_lock();
 106
 107         priv = filp->private_data;
 108
 109         PVRSRVProcessDisconnect(priv->ui32OpenPID);
 110
 111         OSFreeMem(PVRSRV_OS_NON_PAGEABLE_HEAP,
 112                   sizeof(*priv),
 113                   priv, priv->hBlockAlloc);
 114
 115         pvr_unlock();
 116
 117         return 0;
 118 }
 119
 120 static const struct file_operations pvr_fops = {
 121         .owner          = THIS_MODULE,
 122         .unlocked_ioctl = PVRSRV_BridgeDispatchKM,
 123         .open           = pvr_open,
 124         .release        = pvr_release,
 125         .mmap           = PVRMMap,
 126 };
 127
 128 static void pvr_shutdown(struct platform_device *pdev)
 129 {
 130         PVR_TRACE("pvr_shutdown(pdev=%p)", pdev);
 131
 132         (void)PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3);
 133 }
 134
 135 static int pvr_suspend(struct platform_device *pdev, pm_message_t state)
 136 {
 137         PVR_TRACE("pvr_suspend(pdev=%p)", pdev);
 138
 139         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D3) != PVRSRV_OK)
 140                 return -EINVAL;
 141         return 0;
 142 }
 143
 144 static int pvr_resume(struct platform_device *pdev)
 145 {
 146         PVR_TRACE("pvr_resume(pdev=%p)", pdev);
 147
 148         if (PVRSRVSetPowerStateKM(PVRSRV_POWER_STATE_D0) != PVRSRV_OK)
 149                 return -EINVAL;
 150         return 0;
 151 }
 152
 153 static struct miscdevice pvr_miscdevice = {
 154         .minor = MISC_DYNAMIC_MINOR,
 155         .name = DRVNAME,
 156         .fops = &pvr_fops,
 157 };
 158
 159 static int __devinit pvr_probe(struct platform_device *pdev)
 160 {
 161         struct SYS_DATA *sysdata;
 162         int ret;
 163
 164         PVR_TRACE("pvr_probe(pdev=%p)", pdev);
 165
 166         if (SysAcquireData(&sysdata) != PVRSRV_OK &&
 167             SysInitialise(pdev) != PVRSRV_OK) {
 168                 ret = -ENODEV;
 169                 goto err_exit;
 170         }
 171
 172         ret = misc_register(&pvr_miscdevice);
 173         if (ret < 0)
 174                 goto err_exit;
 175
 176         return 0;
 177
 178 err_exit:
 179         dev_err(&pdev->dev, "probe failed (%d)\n", ret);
 180
 181         return ret;
 182 }
 183
 184 static int __devexit pvr_remove(struct platform_device *pdev)
 185 {
 186         struct SYS_DATA *sysdata;
 187         int ret;
 188
 189         PVR_TRACE("pvr_remove(pdev=%p)", pdev);
 190
 191         ret = misc_deregister(&pvr_miscdevice);
 192         if (ret < 0) {
 193                 dev_err(&pdev->dev, "remove failed (%d)\n", ret);
 194                 return ret;
 195         }
 196
 197         if (SysAcquireData(&sysdata) == PVRSRV_OK)
 198                 SysDeinitialise(sysdata);
 199
 200         return 0;
 201 }
 202
 203
 204 static struct platform_driver pvr_driver = {
 205         .driver = {
 206                    .name = DRVNAME,
 207         },
 208         .probe          = pvr_probe,
 209         .remove         = __devexit_p(pvr_remove),
 210         .suspend        = pvr_suspend,
 211         .resume         = pvr_resume,
 212         .shutdown       = pvr_shutdown,
 213 };
 214
 215 static int __init pvr_init(void)
 216 {
 217         int error;
 218
 219         pvr_dbg_init();
 220
 221         PVR_TRACE("pvr_init");
 222
 223         pvr_init_lock();
 224
 225 #ifdef CONFIG_PVR_DEBUG_EXTRA
 226         PVRDebugSetLevel(debug);
 227 #endif
 228
 229         error = CreateProcEntries();
 230         if (error < 0)
 231                 goto err1;
 232
 233         error = -ENOMEM;
 234         if (LinuxMMInit() != PVRSRV_OK)
 235                 goto err2;
 236
 237         if (LinuxBridgeInit() != PVRSRV_OK)
 238                 goto err3;
 239
 240         PVRMMapInit();
 241
 242         error = platform_driver_register(&pvr_driver);
 243         if (error < 0)
 244                 goto err4;
 245
 246         return 0;
 247
 248 err4:
 249         PVRMMapCleanup();
 250         LinuxBridgeDeInit();
 251 err3:
 252         LinuxMMCleanup();
 253 err2:
 254         RemoveProcEntries();
 255 err1:
 256         pr_err("%s: failed (%d)\n", __func__, error);
 257
 258         return error;
 259 }
 260
 261 static void __exit pvr_cleanup(void)
 262 {
 263         struct SYS_DATA *sysdata;
 264
 265         PVR_TRACE("pvr_cleanup");
 266
 267         SysAcquireData(&sysdata);
 268
 269         platform_driver_unregister(&pvr_driver);
 270
 271         PVRMMapCleanup();
 272         LinuxMMCleanup();
 273         LinuxBridgeDeInit();
 274         RemoveProcEntries();
 275
 276         PVR_TRACE("pvr_cleanup: unloading");
 277
 278         pvr_dbg_cleanup();
 279 }
 280
 281 module_init(pvr_init);
 282 module_exit(pvr_cleanup);
 283
 284 MODULE_SUPPORTED_DEVICE(DRVNAME);
 285 MODULE_ALIAS("platform:" DRVNAME);
 286