695 lines
18 KiB
C
695 lines
18 KiB
C
/* tdfx.c -- tdfx driver -*- c -*-
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* Created: Thu Oct 7 10:38:32 1999 by faith@precisioninsight.com
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* Revised: Tue Oct 12 08:51:35 1999 by faith@precisioninsight.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* $PI$
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* $XFree86$
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*
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*/
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#include "drmP.h"
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#include "tdfx_drv.h"
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#include <pci/pcivar.h>
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MODULE_DEPEND(tdfx, drm, 1, 1, 1);
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#define TDFX_NAME "tdfx"
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#define TDFX_DESC "tdfx"
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#define TDFX_DATE "19991009"
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#define TDFX_MAJOR 0
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#define TDFX_MINOR 0
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#define TDFX_PATCHLEVEL 1
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static int tdfx_init(device_t nbdev);
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static void tdfx_cleanup(device_t nbdev);
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drm_ctx_t tdfx_res_ctx;
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static int tdfx_probe(device_t dev)
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{
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const char *s = 0;
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switch (pci_get_devid(dev)) {
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case 0x0003121a:
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s = "3Dfx Voodoo Banshee graphics accelerator";
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break;
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case 0x0005121a:
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s = "3Dfx Voodoo 3 graphics accelerator";
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break;
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}
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if (s) {
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device_set_desc(dev, s);
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return 0;
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}
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return ENXIO;
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}
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static int tdfx_attach(device_t dev)
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{
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tdfx_init(dev);
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return 0;
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}
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static int tdfx_detach(device_t dev)
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{
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tdfx_cleanup(dev);
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return 0;
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}
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static device_method_t tdfx_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, tdfx_probe),
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DEVMETHOD(device_attach, tdfx_attach),
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DEVMETHOD(device_detach, tdfx_detach),
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{ 0, 0 }
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};
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static driver_t tdfx_driver = {
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"drm",
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tdfx_methods,
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sizeof(drm_device_t),
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};
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static devclass_t tdfx_devclass;
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#define TDFX_SOFTC(unit) \
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((drm_device_t *) devclass_get_softc(tdfx_devclass, unit))
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DRIVER_MODULE(if_tdfx, pci, tdfx_driver, tdfx_devclass, 0, 0);
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#define CDEV_MAJOR 145
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/* tdfx_drv.c */
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static d_open_t tdfx_open;
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static d_close_t tdfx_close;
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static d_ioctl_t tdfx_version;
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static d_ioctl_t tdfx_ioctl;
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static d_ioctl_t tdfx_lock;
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static d_ioctl_t tdfx_unlock;
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static struct cdevsw tdfx_cdevsw = {
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/* open */ tdfx_open,
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/* close */ tdfx_close,
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/* read */ drm_read,
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/* write */ drm_write,
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/* ioctl */ tdfx_ioctl,
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/* poll */ drm_poll,
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/* mmap */ drm_mmap,
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/* strategy */ nostrategy,
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/* name */ "tdfx",
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/* maj */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ D_TTY | D_TRACKCLOSE,
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/* bmaj */ -1
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};
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static drm_ioctl_desc_t tdfx_ioctls[] = {
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[DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { tdfx_version, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_busid, 0, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_block, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_unblock, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { tdfx_addctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { tdfx_rmctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { tdfx_modctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { tdfx_getctx, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { tdfx_switchctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { tdfx_newctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { tdfx_resctx, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { tdfx_lock, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { tdfx_unlock, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_finish, 1, 0 },
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};
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#define TDFX_IOCTL_COUNT DRM_ARRAY_SIZE(tdfx_ioctls)
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static int
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tdfx_setup(drm_device_t *dev)
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{
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int i;
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device_busy(dev->device);
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atomic_set(&dev->ioctl_count, 0);
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atomic_set(&dev->vma_count, 0);
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dev->buf_use = 0;
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atomic_set(&dev->buf_alloc, 0);
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atomic_set(&dev->total_open, 0);
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atomic_set(&dev->total_close, 0);
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atomic_set(&dev->total_ioctl, 0);
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atomic_set(&dev->total_irq, 0);
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atomic_set(&dev->total_ctx, 0);
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atomic_set(&dev->total_locks, 0);
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atomic_set(&dev->total_unlocks, 0);
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atomic_set(&dev->total_contends, 0);
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atomic_set(&dev->total_sleeps, 0);
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for (i = 0; i < DRM_HASH_SIZE; i++) {
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dev->magiclist[i].head = NULL;
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dev->magiclist[i].tail = NULL;
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}
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dev->maplist = NULL;
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dev->map_count = 0;
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dev->vmalist = NULL;
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dev->lock.hw_lock = NULL;
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dev->lock.lock_queue = 0;
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dev->queue_count = 0;
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dev->queue_reserved = 0;
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dev->queue_slots = 0;
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dev->queuelist = NULL;
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dev->irq = 0;
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dev->context_flag = 0;
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dev->interrupt_flag = 0;
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dev->dma = 0;
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dev->dma_flag = 0;
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dev->last_context = 0;
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dev->last_switch = 0;
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dev->last_checked = 0;
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callout_init(&dev->timer);
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dev->context_wait = 0;
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timespecclear(&dev->ctx_start);
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timespecclear(&dev->lck_start);
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dev->buf_rp = dev->buf;
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dev->buf_wp = dev->buf;
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dev->buf_end = dev->buf + DRM_BSZ;
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bzero(&dev->buf_sel, sizeof dev->buf_sel);
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dev->buf_sigio = NULL;
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dev->buf_readers = 0;
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dev->buf_writers = 0;
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dev->buf_selecting = 0;
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tdfx_res_ctx.handle=-1;
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DRM_DEBUG("\n");
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/* The kernel's context could be created here, but is now created
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in drm_dma_enqueue. This is more resource-efficient for
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hardware that does not do DMA, but may mean that
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drm_select_queue fails between the time the interrupt is
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initialized and the time the queues are initialized. */
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return 0;
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}
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static int
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tdfx_takedown(drm_device_t *dev)
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{
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int i;
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drm_magic_entry_t *pt, *next;
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drm_map_t *map;
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drm_vma_entry_t *vma, *vma_next;
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DRM_DEBUG("\n");
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lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc);
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callout_stop(&dev->timer);
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if (dev->devname) {
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drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
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dev->devname = NULL;
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}
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if (dev->unique) {
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drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
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dev->unique = NULL;
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dev->unique_len = 0;
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}
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/* Clear pid list */
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for (i = 0; i < DRM_HASH_SIZE; i++) {
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for (pt = dev->magiclist[i].head; pt; pt = next) {
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next = pt->next;
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drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
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}
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dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
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}
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/* Clear vma list (only built for debugging) */
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if (dev->vmalist) {
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for (vma = dev->vmalist; vma; vma = vma_next) {
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vma_next = vma->next;
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drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
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}
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dev->vmalist = NULL;
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}
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/* Clear map area and mtrr information */
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if (dev->maplist) {
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for (i = 0; i < dev->map_count; i++) {
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map = dev->maplist[i];
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switch (map->type) {
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case _DRM_REGISTERS:
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case _DRM_FRAME_BUFFER:
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#ifdef CONFIG_MTRR
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if (map->mtrr >= 0) {
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int retcode;
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retcode = mtrr_del(map->mtrr,
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map->offset,
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map->size);
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DRM_DEBUG("mtrr_del = %d\n", retcode);
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}
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#endif
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drm_ioremapfree(map->handle, map->size);
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break;
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case _DRM_SHM:
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drm_free_pages((unsigned long)map->handle,
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drm_order(map->size)
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- PAGE_SHIFT,
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DRM_MEM_SAREA);
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break;
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case _DRM_AGP:
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break; /* XXX */
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}
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drm_free(map, sizeof(*map), DRM_MEM_MAPS);
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}
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drm_free(dev->maplist,
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dev->map_count * sizeof(*dev->maplist),
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DRM_MEM_MAPS);
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dev->maplist = NULL;
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dev->map_count = 0;
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}
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if (dev->lock.hw_lock) {
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dev->lock.hw_lock = NULL; /* SHM removed */
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dev->lock.pid = 0;
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wakeup(&dev->lock.lock_queue);
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}
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lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
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device_unbusy(dev->device);
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return 0;
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}
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/* tdfx_init is called via tdfx_attach at module load time, */
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static int
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tdfx_init(device_t nbdev)
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{
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drm_device_t *dev = device_get_softc(nbdev);
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DRM_DEBUG("\n");
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memset((void *)dev, 0, sizeof(*dev));
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simple_lock_init(&dev->count_lock);
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lockinit(&dev->dev_lock, PZERO, "drmlk", 0, 0);
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#if 0
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drm_parse_options(tdfx);
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#endif
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dev->device = nbdev;
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dev->devnode = make_dev(&tdfx_cdevsw,
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device_get_unit(nbdev),
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DRM_DEV_UID,
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DRM_DEV_GID,
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DRM_DEV_MODE,
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TDFX_NAME);
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dev->name = TDFX_NAME;
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drm_mem_init();
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drm_sysctl_init(dev);
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TAILQ_INIT(&dev->files);
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DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
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TDFX_NAME,
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TDFX_MAJOR,
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TDFX_MINOR,
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TDFX_PATCHLEVEL,
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TDFX_DATE,
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device_get_unit(nbdev));
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return 0;
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}
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/* tdfx_cleanup is called via tdfx_detach at module unload time. */
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static void
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tdfx_cleanup(device_t nbdev)
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{
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drm_device_t *dev = device_get_softc(nbdev);
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DRM_DEBUG("\n");
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drm_sysctl_cleanup(dev);
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destroy_dev(dev->devnode);
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DRM_INFO("Module unloaded\n");
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device_busy(dev->device);
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tdfx_takedown(dev);
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}
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static int
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tdfx_version(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
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{
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drm_version_t version;
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int len;
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version = *(drm_version_t *) data;
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#define DRM_COPY(name,value) \
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len = strlen(value); \
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if (len > name##_len) len = name##_len; \
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name##_len = strlen(value); \
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if (len && name) { \
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int error = copyout(value, name, len); \
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if (error) return error; \
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}
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version.version_major = TDFX_MAJOR;
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version.version_minor = TDFX_MINOR;
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version.version_patchlevel = TDFX_PATCHLEVEL;
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DRM_COPY(version.name, TDFX_NAME);
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DRM_COPY(version.date, TDFX_DATE);
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DRM_COPY(version.desc, TDFX_DESC);
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*(drm_version_t *) data = version;
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return 0;
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}
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static int
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tdfx_open(dev_t kdev, int flags, int fmt, struct proc *p)
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{
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drm_device_t *dev = TDFX_SOFTC(minor(kdev));
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int retcode = 0;
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DRM_DEBUG("open_count = %d\n", dev->open_count);
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device_busy(dev->device);
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if (!(retcode = drm_open_helper(kdev, flags, fmt, p, dev))) {
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atomic_inc(&dev->total_open);
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simple_lock(&dev->count_lock);
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if (!dev->open_count++) {
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simple_unlock(&dev->count_lock);
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retcode = tdfx_setup(dev);
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}
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simple_unlock(&dev->count_lock);
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}
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device_unbusy(dev->device);
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return retcode;
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}
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static int
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tdfx_close(dev_t kdev, int flags, int fmt, struct proc *p)
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{
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drm_device_t *dev = kdev->si_drv1;
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int retcode = 0;
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DRM_DEBUG("open_count = %d\n", dev->open_count);
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if (!(retcode = drm_close(kdev, flags, fmt, p))) {
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atomic_inc(&dev->total_close);
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simple_lock(&dev->count_lock);
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if (!--dev->open_count) {
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if (atomic_read(&dev->ioctl_count) || dev->blocked) {
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DRM_ERROR("Device busy: %d %d\n",
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atomic_read(&dev->ioctl_count),
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dev->blocked);
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simple_unlock(&dev->count_lock);
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return EBUSY;
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}
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simple_unlock(&dev->count_lock);
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return tdfx_takedown(dev);
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}
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simple_unlock(&dev->count_lock);
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}
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return retcode;
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}
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/* tdfx_ioctl is called whenever a process performs an ioctl on /dev/drm. */
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static int
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tdfx_ioctl(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
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{
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int nr = DRM_IOCTL_NR(cmd);
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drm_device_t *dev = kdev->si_drv1;
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drm_file_t *priv;
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int retcode = 0;
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drm_ioctl_desc_t *ioctl;
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d_ioctl_t *func;
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DRM_DEBUG("dev=%p\n", dev);
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priv = drm_find_file_by_proc(dev, p);
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if (!priv) {
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DRM_DEBUG("can't find authenticator\n");
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return EINVAL;
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}
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atomic_inc(&dev->ioctl_count);
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atomic_inc(&dev->total_ioctl);
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++priv->ioctl_count;
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DRM_DEBUG("pid = %d, cmd = 0x%02lx, nr = 0x%02x, auth = %d\n",
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p->p_pid, cmd, nr, priv->authenticated);
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switch (cmd) {
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case FIONBIO:
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atomic_dec(&dev->ioctl_count);
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return 0;
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case FIOASYNC:
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atomic_dec(&dev->ioctl_count);
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dev->flags |= FASYNC;
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return 0;
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case FIOSETOWN:
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atomic_dec(&dev->ioctl_count);
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return fsetown(*(int *)data, &dev->buf_sigio);
|
|
|
|
case FIOGETOWN:
|
|
atomic_dec(&dev->ioctl_count);
|
|
*(int *) data = fgetown(dev->buf_sigio);
|
|
return 0;
|
|
}
|
|
|
|
if (nr >= TDFX_IOCTL_COUNT) {
|
|
retcode = EINVAL;
|
|
} else {
|
|
ioctl = &tdfx_ioctls[nr];
|
|
func = ioctl->func;
|
|
|
|
if (!func) {
|
|
DRM_DEBUG("no function\n");
|
|
retcode = EINVAL;
|
|
} else if ((ioctl->root_only && suser(p))
|
|
|| (ioctl->auth_needed && !priv->authenticated)) {
|
|
retcode = EACCES;
|
|
} else {
|
|
retcode = (func)(kdev, cmd, data, flags, p);
|
|
}
|
|
}
|
|
|
|
atomic_dec(&dev->ioctl_count);
|
|
return retcode;
|
|
}
|
|
|
|
static int
|
|
tdfx_lock(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
|
|
{
|
|
drm_device_t *dev = kdev->si_drv1;
|
|
int ret = 0;
|
|
drm_lock_t lock;
|
|
#if DRM_DMA_HISTOGRAM
|
|
|
|
getnanotime(&dev->lck_start);
|
|
#endif
|
|
|
|
lock = *(drm_lock_t *) data;
|
|
|
|
if (lock.context == DRM_KERNEL_CONTEXT) {
|
|
DRM_ERROR("Process %d using kernel context %d\n",
|
|
p->p_pid, lock.context);
|
|
return EINVAL;
|
|
}
|
|
|
|
DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
|
|
lock.context, p->p_pid, dev->lock.hw_lock->lock,
|
|
lock.flags);
|
|
|
|
#if 0
|
|
/* dev->queue_count == 0 right now for
|
|
tdfx. FIXME? */
|
|
if (lock.context < 0 || lock.context >= dev->queue_count)
|
|
return EINVAL;
|
|
#endif
|
|
|
|
if (!ret) {
|
|
#if 0
|
|
if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
|
|
!= lock.context) {
|
|
long j = ticks - dev->lock.lock_time;
|
|
|
|
if (lock.context == tdfx_res_ctx.handle &&
|
|
j >= 0 && j < DRM_LOCK_SLICE) {
|
|
/* Can't take lock if we just had it and
|
|
there is contention. */
|
|
DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d ticks=%d\n",
|
|
lock.context, p->p_pid, j,
|
|
dev->lock.lock_time, ticks);
|
|
ret = tsleep(&never, PZERO|PCATCH, "drmlk1",
|
|
DRM_LOCK_SLICE - j);
|
|
if (ret)
|
|
return ret;
|
|
DRM_DEBUG("ticks=%d\n", ticks);
|
|
}
|
|
}
|
|
#endif
|
|
for (;;) {
|
|
if (!dev->lock.hw_lock) {
|
|
/* Device has been unregistered */
|
|
ret = EINTR;
|
|
break;
|
|
}
|
|
if (drm_lock_take(&dev->lock.hw_lock->lock,
|
|
lock.context)) {
|
|
dev->lock.pid = p->p_pid;
|
|
dev->lock.lock_time = ticks;
|
|
atomic_inc(&dev->total_locks);
|
|
break; /* Got lock */
|
|
}
|
|
|
|
/* Contention */
|
|
atomic_inc(&dev->total_sleeps);
|
|
ret = tsleep(&dev->lock.lock_queue,
|
|
PZERO|PCATCH,
|
|
"drmlk2",
|
|
0);
|
|
if (ret)
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
if (!ret && dev->last_context != lock.context &&
|
|
lock.context != tdfx_res_ctx.handle &&
|
|
dev->last_context != tdfx_res_ctx.handle) {
|
|
add_wait_queue(&dev->context_wait, &entry);
|
|
current->state = TASK_INTERRUPTIBLE;
|
|
/* PRE: dev->last_context != lock.context */
|
|
tdfx_context_switch(dev, dev->last_context, lock.context);
|
|
/* POST: we will wait for the context
|
|
switch and will dispatch on a later call
|
|
when dev->last_context == lock.context
|
|
NOTE WE HOLD THE LOCK THROUGHOUT THIS
|
|
TIME! */
|
|
current->policy |= SCHED_YIELD;
|
|
schedule();
|
|
current->state = TASK_RUNNING;
|
|
remove_wait_queue(&dev->context_wait, &entry);
|
|
if (signal_pending(current)) {
|
|
ret = EINTR;
|
|
} else if (dev->last_context != lock.context) {
|
|
DRM_ERROR("Context mismatch: %d %d\n",
|
|
dev->last_context, lock.context);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (!ret) {
|
|
if (lock.flags & _DRM_LOCK_READY) {
|
|
/* Wait for space in DMA/FIFO */
|
|
}
|
|
if (lock.flags & _DRM_LOCK_QUIESCENT) {
|
|
/* Make hardware quiescent */
|
|
#if 0
|
|
tdfx_quiescent(dev);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
DRM_ERROR("pid = %5d, old counter = %5ld\n",
|
|
p->p_pid, current->counter);
|
|
#endif
|
|
#if 0
|
|
while (current->counter > 25)
|
|
current->counter >>= 1; /* decrease time slice */
|
|
DRM_ERROR("pid = %5d, new counter = %5ld\n",
|
|
p->p_pid, current->counter);
|
|
#endif
|
|
DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
|
|
|
|
#if DRM_DMA_HISTOGRAM
|
|
{
|
|
struct timespec ts;
|
|
getnanotime(&ts);
|
|
timespecsub(&ts, &dev->lck_start);
|
|
atomic_inc(&dev->histo.lhld[drm_histogram_slot(&ts)]);
|
|
}
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int
|
|
tdfx_unlock(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
|
|
{
|
|
drm_device_t *dev = kdev->si_drv1;
|
|
drm_lock_t lock;
|
|
|
|
lock = *(drm_lock_t *) data;
|
|
|
|
if (lock.context == DRM_KERNEL_CONTEXT) {
|
|
DRM_ERROR("Process %d using kernel context %d\n",
|
|
p->p_pid, lock.context);
|
|
return EINVAL;
|
|
}
|
|
|
|
DRM_DEBUG("%d frees lock (%d holds)\n",
|
|
lock.context,
|
|
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
|
|
atomic_inc(&dev->total_unlocks);
|
|
if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
|
|
atomic_inc(&dev->total_contends);
|
|
drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
|
|
/* FIXME: Try to send data to card here */
|
|
if (!dev->context_flag) {
|
|
if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
|
|
DRM_KERNEL_CONTEXT)) {
|
|
DRM_ERROR("\n");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|