renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

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author	Dave Airlie <airlied@redhat.com>	2008-06-04 13:16:49 +1000
committer	Dave Airlie <airlied@redhat.com>	2008-06-04 13:16:49 +1000
commit	9f31bd09c1e748f72a30f6a0861cd72d93258992 (patch)
tree	f5b52f9203e25c35156dbd432f57c26d1e390524 /linux-core/drmP.h
parent	8e4c61e52651c47f3d9fbbe5e80455baff0de2bb (diff)

drm/sysfs: don't try an unregister if not registered

Diffstat (limited to 'linux-core/drmP.h')

0 files changed, 0 insertions, 0 deletions

/* mga_drv.c -- Matrox g200/g400 driver * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Authors: Rickard E. (Rik) Faith <faith@valinux.com> * Jeff Hartmann <jhartmann@valinux.com> * * */ #include "drmP.h" #include "mga_drv.h" #include <pci/pcivar.h> MODULE_DEPEND(mga, drm, 1, 1, 1); MODULE_DEPEND(mga, agp, 1, 1, 1); #define MGA_NAME "mga" #define MGA_DESC "Matrox g200/g400" #define MGA_DATE "19991213" #define MGA_MAJOR 1 #define MGA_MINOR 0 #define MGA_PATCHLEVEL 0 drm_ctx_t mga_res_ctx; static int mga_probe(device_t dev) { const char *s = 0; switch (pci_get_devid(dev)) { case 0x0525102b: s = "Matrox MGA G400 AGP graphics accelerator"; break; case 0x0521102b: s = "Matrox MGA G200 AGP graphics accelerator"; break; } if (s) { device_set_desc(dev, s); return 0; } return ENXIO; } static int mga_attach(device_t dev) { return mga_init(dev); } static int mga_detach(device_t dev) { mga_cleanup(dev); return 0; } static device_method_t mga_methods[] = { /* Device interface */ DEVMETHOD(device_probe, mga_probe), DEVMETHOD(device_attach, mga_attach), DEVMETHOD(device_detach, mga_detach), { 0, 0 } }; static driver_t mga_driver = { "drm", mga_methods, sizeof(drm_device_t), }; static devclass_t mga_devclass; #define MGA_SOFTC(unit) \ ((drm_device_t *) devclass_get_softc(mga_devclass, unit)) DRIVER_MODULE(if_mga, pci, mga_driver, mga_devclass, 0, 0); #define CDEV_MAJOR 145 /* mga_drv.c */ static struct cdevsw mga_cdevsw = { /* open */ mga_open, /* close */ mga_close, /* read */ drm_read, /* write */ drm_write, /* ioctl */ mga_ioctl, /* poll */ drm_poll, /* mmap */ drm_mmap, /* strategy */ nostrategy, /* name */ "mga", /* maj */ CDEV_MAJOR, /* dump */ nodump, /* psize */ nopsize, /* flags */ D_TTY | D_TRACKCLOSE, /* bmaj */ -1 }; static drm_ioctl_desc_t mga_ioctls[] = { [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { mga_version, 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_busid, 0, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_block, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_unblock, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { mga_control, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { mga_addbufs, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { mga_markbufs, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { mga_infobufs, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { mga_mapbufs, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { mga_freebufs, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { mga_addctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { mga_rmctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { mga_modctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { mga_getctx, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { mga_switchctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { mga_newctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { mga_resctx, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_DMA)] = { mga_dma, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { mga_lock, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { mga_unlock, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_finish, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_MGA_INIT)] = { mga_dma_init, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_MGA_SWAP)] = { mga_swap_bufs, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_MGA_CLEAR)] = { mga_clear_bufs, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_MGA_ILOAD)] = { mga_iload, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_MGA_VERTEX)] = { mga_vertex, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_MGA_FLUSH)] = { mga_flush_ioctl, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_MGA_INDICES)] = { mga_indices, 1, 0 }, }; #define MGA_IOCTL_COUNT DRM_ARRAY_SIZE(mga_ioctls) static int mga_setup(drm_device_t *dev) { int i; device_busy(dev->device); atomic_set(&dev->ioctl_count, 0); atomic_set(&dev->vma_count, 0); dev->buf_use = 0; atomic_set(&dev->buf_alloc, 0); drm_dma_setup(dev); atomic_set(&dev->total_open, 0); atomic_set(&dev->total_close, 0); atomic_set(&dev->total_ioctl, 0); atomic_set(&dev->total_irq, 0); atomic_set(&dev->total_ctx, 0); atomic_set(&dev->total_locks, 0); atomic_set(&dev->total_unlocks, 0); atomic_set(&dev->total_contends, 0); atomic_set(&dev->total_sleeps, 0); for (i = 0; i < DRM_HASH_SIZE; i++) { dev->magiclist[i].head = NULL; dev->magiclist[i].tail = NULL; } dev->maplist = NULL; dev->map_count = 0; dev->vmalist = NULL; dev->lock.hw_lock = NULL; dev->lock.lock_queue = 0; dev->queue_count = 0; dev->queue_reserved = 0; dev->queue_slots = 0; dev->queuelist = NULL; dev->irq = 0; dev->context_flag = 0; dev->interrupt_flag = 0; dev->dma_flag = 0; dev->last_context = 0; dev->last_switch = 0; dev->last_checked = 0; callout_init(&dev->timer); dev->context_wait = 0; timespecclear(&dev->ctx_start); timespecclear(&dev->lck_start); dev->buf_rp = dev->buf; dev->buf_wp = dev->buf; dev->buf_end = dev->buf + DRM_BSZ; bzero(&dev->buf_sel, sizeof dev->buf_sel); dev->buf_sigio = NULL; dev->buf_readers = 0; dev->buf_writers = 0; dev->buf_selecting = 0; DRM_DEBUG("\n"); /* The kernel's context could be created here, but is now created in drm_dma_enqueue. This is more resource-efficient for hardware that does not do DMA, but may mean that drm_select_queue fails between the time the interrupt is initialized and the time the queues are initialized. */ return 0; } static int mga_takedown(drm_device_t *dev) { int i; drm_magic_entry_t *pt, *next; drm_map_t *map; drm_vma_entry_t *vma, *vma_next; DRM_DEBUG("\n"); if (dev->irq) mga_irq_uninstall(dev); lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc); callout_stop(&dev->timer); if (dev->devname) { drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER); dev->devname = NULL; } if (dev->unique) { drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER); dev->unique = NULL; dev->unique_len = 0; } /* Clear pid list */ for (i = 0; i < DRM_HASH_SIZE; i++) { for (pt = dev->magiclist[i].head; pt; pt = next) { next = pt->next; drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC); } dev->magiclist[i].head = dev->magiclist[i].tail = NULL; } /* Clear AGP information */ if (dev->agp) { drm_agp_mem_t *entry; drm_agp_mem_t *nexte; /* Remove AGP resources, but leave dev->agp intact until cleanup is called. */ for (entry = dev->agp->memory; entry; entry = nexte) { nexte = entry->next; if (entry->bound) drm_unbind_agp(entry->handle); drm_free_agp(entry->handle, entry->pages); drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); } dev->agp->memory = NULL; if (dev->agp->acquired) agp_release(dev->agp->agpdev); dev->agp->acquired = 0; dev->agp->enabled = 0; } /* Clear vma list (only built for debugging) */ if (dev->vmalist) { for (vma = dev->vmalist; vma; vma = vma_next) { vma_next = vma->next; drm_free(vma, sizeof(*vma), DRM_MEM_VMAS); } dev->vmalist = NULL; } /* Clear map area and mtrr information */ if (dev->maplist) { for (i = 0; i < dev->map_count; i++) { map = dev->maplist[i]; switch (map->type) { case _DRM_REGISTERS: case _DRM_FRAME_BUFFER: #ifdef CONFIG_MTRR if (map->mtrr >= 0) { int retcode; retcode = mtrr_del(map->mtrr, map->offset, map->size); DRM_DEBUG("mtrr_del = %d\n", retcode); } #endif drm_ioremapfree(map->handle, map->size); break; case _DRM_SHM: drm_free_pages((unsigned long)map->handle, drm_order(map->size) - PAGE_SHIFT, DRM_MEM_SAREA); break; case _DRM_AGP: break; } drm_free(map, sizeof(*map), DRM_MEM_MAPS); } drm_free(dev->maplist, dev->map_count * sizeof(*dev->maplist), DRM_MEM_MAPS); dev->maplist = NULL; dev->map_count = 0; } if (dev->queuelist) { for (i = 0; i < dev->queue_count; i++) { drm_waitlist_destroy(&dev->queuelist[i]->waitlist); if (dev->queuelist[i]) { drm_free(dev->queuelist[i], sizeof(*dev->queuelist[0]), DRM_MEM_QUEUES); dev->queuelist[i] = NULL; } } drm_free(dev->queuelist, dev->queue_slots * sizeof(*dev->queuelist), DRM_MEM_QUEUES); dev->queuelist = NULL; } drm_dma_takedown(dev); dev->queue_count = 0; if (dev->lock.hw_lock) { dev->lock.hw_lock = NULL; /* SHM removed */ dev->lock.pid = 0; wakeup(&dev->lock.lock_queue); } lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc); return 0; } /* mga_init is called via mga_attach at module load time, */ int mga_init(device_t nbdev) { int retcode; drm_device_t *dev = device_get_softc(nbdev); DRM_DEBUG("\n"); memset((void *)dev, 0, sizeof(*dev)); simple_lock_init(&dev->count_lock); lockinit(&dev->dev_lock, PZERO, "drmlk", 0, 0); #if 0 drm_parse_options(mga); #endif dev->device = nbdev; dev->devnode = make_dev(&mga_cdevsw, device_get_unit(nbdev), DRM_DEV_UID, DRM_DEV_GID, DRM_DEV_MODE, MGA_NAME); dev->name = MGA_NAME; DRM_DEBUG("doing mem init\n"); drm_mem_init(); DRM_DEBUG("doing proc init\n"); drm_sysctl_init(dev); TAILQ_INIT(&dev->files); DRM_DEBUG("doing agp init\n"); dev->agp = drm_agp_init(); if(dev->agp == NULL) { DRM_INFO("The mga drm module requires the agp module" " to function correctly\nPlease load the agp" " module before you load the mga module\n"); drm_sysctl_cleanup(dev); mga_takedown(dev); return ENOMEM; } #if 0 dev->agp->agp_mtrr = mtrr_add(dev->agp->agp_info.aper_base, dev->agp->agp_info.aper_size * 1024 * 1024, MTRR_TYPE_WRCOMB, 1); #endif DRM_DEBUG("doing ctxbitmap init\n"); if((retcode = drm_ctxbitmap_init(dev))) { DRM_ERROR("Cannot allocate memory for context bitmap.\n"); drm_sysctl_cleanup(dev); mga_takedown(dev); return retcode; } DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", MGA_NAME, MGA_MAJOR, MGA_MINOR, MGA_PATCHLEVEL, MGA_DATE, device_get_unit(nbdev)); return 0; } /* mga_cleanup is called via cleanup_module at module unload time. */ void mga_cleanup(device_t nbdev) { drm_device_t *dev = device_get_softc(nbdev); DRM_DEBUG("\n"); drm_sysctl_cleanup(dev); destroy_dev(dev->devnode); DRM_INFO("Module unloaded\n"); drm_ctxbitmap_cleanup(dev); mga_dma_cleanup(dev); #if 0 if(dev->agp && dev->agp->agp_mtrr) { int retval; retval = mtrr_del(dev->agp->agp_mtrr, dev->agp->agp_info.aper_base, dev->agp->agp_info.aper_size * 1024*1024); DRM_DEBUG("mtrr_del = %d\n", retval); } #endif mga_takedown(dev); if (dev->agp) { drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS); dev->agp = NULL; } } int mga_version(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p) { drm_version_t version; int len; version = *(drm_version_t *) data; #define DRM_COPY(name,value) \ len = strlen(value); \ if (len > name##_len) len = name##_len; \ name##_len = strlen(value); \ if (len && name) { \ int error = copyout(value, name, len); \ if (error) return error; \ } version.version_major = MGA_MAJOR; version.version_minor = MGA_MINOR; version.version_patchlevel = MGA_PATCHLEVEL; DRM_COPY(version.name, MGA_NAME); DRM_COPY(version.date, MGA_DATE); DRM_COPY(version.desc, MGA_DESC); *(drm_version_t *) data = version; return 0; } int mga_open(dev_t kdev, int flags, int fmt, struct proc *p) { drm_device_t *dev = MGA_SOFTC(minor(kdev)); int retcode = 0; DRM_DEBUG("open_count = %d\n", dev->open_count); device_busy(dev->device); if (!(retcode = drm_open_helper(kdev, flags, fmt, p, dev))) { atomic_inc(&dev->total_open); simple_lock(&dev->count_lock); if (!dev->open_count++) { simple_unlock(&dev->count_lock); retcode = mga_setup(dev); } simple_unlock(&dev->count_lock); } device_unbusy(dev->device); return retcode; } int mga_close(dev_t kdev, int flags, int fmt, struct proc *p) { drm_device_t *dev = kdev->si_drv1; drm_file_t *priv; int retcode = 0; DRM_DEBUG("pid = %d, open_count = %d\n", p->p_pid, dev->open_count); priv = drm_find_file_by_proc(dev, p); if (!priv) { DRM_DEBUG("can't find authenticator\n"); return EINVAL; } if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) && dev->lock.pid == p->p_pid) { mga_reclaim_buffers(dev, priv->pid); DRM_ERROR("Process %d dead, freeing lock for context %d\n", p->p_pid, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)); drm_lock_free(dev, &dev->lock.hw_lock->lock, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)); /* FIXME: may require heavy-handed reset of hardware at this point, possibly processed via a callback to the X server. */ } else if (dev->lock.hw_lock) { /* The lock is required to reclaim buffers */ for (;;) { if (!dev->lock.hw_lock) { /* Device has been unregistered */ retcode = EINTR; break; } if (drm_lock_take(&dev->lock.hw_lock->lock, DRM_KERNEL_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); retcode = tsleep(&dev->lock.lock_queue, PZERO|PCATCH, "drmlk2", 0); if (retcode) break; } if(!retcode) { mga_reclaim_buffers(dev, priv->pid); drm_lock_free(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT); } } funsetown(dev->buf_sigio); lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, p); priv = drm_find_file_by_proc(dev, p); if (priv) { priv->refs--; if (!priv->refs) { TAILQ_REMOVE(&dev->files, priv, link); drm_free(priv, sizeof(*priv), DRM_MEM_FILES); } } lockmgr(&dev->dev_lock, LK_RELEASE, 0, p); atomic_inc(&dev->total_close); simple_lock(&dev->count_lock); if (!--dev->open_count) { if (atomic_read(&dev->ioctl_count) || dev->blocked) { DRM_ERROR("Device busy: %d %d\n", atomic_read(&dev->ioctl_count), dev->blocked); simple_unlock(&dev->count_lock); return EBUSY; } simple_unlock(&dev->count_lock); device_unbusy(dev->device); return mga_takedown(dev); }


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