/* mga_drv.c -- Matrox g200/g400 driver -*- linux-c -*- * 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 * Jeff Hartmann * * */ #define EXPORT_SYMTAB #include "drmP.h" #include "mga_drv.h" EXPORT_SYMBOL(mga_init); EXPORT_SYMBOL(mga_cleanup); #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 static drm_device_t mga_device; drm_ctx_t mga_res_ctx; static struct file_operations mga_fops = { open: mga_open, flush: drm_flush, release: mga_release, ioctl: mga_ioctl, mmap: drm_mmap, read: drm_read, fasync: drm_fasync, poll: drm_poll, }; static struct miscdevice mga_misc = { minor: MISC_DYNAMIC_MINOR, name: MGA_NAME, fops: &mga_fops, }; 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 }, }; #define MGA_IOCTL_COUNT DRM_ARRAY_SIZE(mga_ioctls) #ifdef MODULE int init_module(void); void cleanup_module(void); static char *mga = NULL; MODULE_AUTHOR("Precision Insight, Inc., Cedar Park, Texas."); MODULE_DESCRIPTION("Matrox g200/g400"); MODULE_PARM(mga, "s"); /* init_module is called when insmod is used to load the module */ int init_module(void) { DRM_DEBUG("doing mga_init()\n"); return mga_init(); } /* cleanup_module is called when rmmod is used to unload the module */ void cleanup_module(void) { mga_cleanup(); } #endif #ifndef MODULE /* mga_setup is called by the kernel to parse command-line options passed * via the boot-loader (e.g., LILO). It calls the insmod option routine, * drm_parse_drm. * * This is not currently supported, since it requires changes to * linux/init/main.c. */ void __init mga_setup(char *str, int *ints) { if (ints[0] != 0) { DRM_ERROR("Illegal command line format, ignored\n"); return; } drm_parse_options(str); } #endif static int mga_setup(drm_device_t *dev) { int i; 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; init_waitqueue_head(&dev->lock.lock_queue); 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; init_timer(&dev->timer); init_waitqueue_head(&dev->context_wait); dev->ctx_start = 0; dev->lck_start = 0; dev->buf_rp = dev->buf; dev->buf_wp = dev->buf; dev->buf_end = dev->buf + DRM_BSZ; dev->buf_async = NULL; init_waitqueue_head(&dev->buf_readers); init_waitqueue_head(&dev->buf_writers); 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); down(&dev->struct_sem); del_timer(&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->memory); drm_free_agp(entry->memory, entry->pages); drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); } dev->agp->memory = NULL; if (dev->agp->acquired && drm_agp.release) (*drm_agp.release)(); 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; wake_up_interruptible(&dev->lock.lock_queue); } up(&dev->struct_sem); return 0; } /* mga_init is called via init_module at module load time, or via * linux/init/main.c (this is not currently supported). */ int mga_init(void) { int retcode; drm_device_t *dev = &mga_device; DRM_DEBUG("\n"); memset((void *)dev, 0, sizeof(*dev)); dev->count_lock = SPIN_LOCK_UNLOCKED; sema_init(&dev->struct_sem, 1); #ifdef MODULE drm_parse_options(mga); #endif DRM_DEBUG("doing misc_register\n"); if ((retcode = misc_register(&mga_misc))) { DRM_ERROR("Cannot register \"%s\"\n", MGA_NAME); return retcode; } dev->device = MKDEV(MISC_MAJOR, mga_misc.minor); dev->name = MGA_NAME; DRM_DEBUG("doing mem init\n"); drm_mem_init(); DRM_DEBUG("doing proc init\n"); drm_proc_init(dev); DRM_DEBUG("doing agp init\n"); dev->agp = drm_agp_init(); if(dev->agp == NULL) { DRM_INFO("The mga drm module requires the agpgart module" " to function correctly\nPlease load the agpgart" " module before you load the mga module\n"); drm_proc_cleanup(); misc_deregister(&mga_misc); mga_takedown(dev); return -ENOMEM; } #ifdef CONFIG_MTRR 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_proc_cleanup(); misc_deregister(&mga_misc); 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, mga_misc.minor); return 0; } /* mga_cleanup is called via cleanup_module at module unload time. */ void mga_cleanup(void) { drm_device_t *dev = &mga_device; DRM_DEBUG("\n"); drm_proc_cleanup(); if (misc_deregister(&mga_misc)) { DRM_ERROR("Cannot unload module\n"); } else { DRM_INFO("Module unloaded\n"); } drm_ctxbitmap_cleanup(dev); mga_dma_cleanup(dev); #ifdef CONFIG_MTRR 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(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { drm_version_t version; int len; copy_from_user_ret(&version, (drm_version_t *)arg, sizeof(version), -EFAULT); #define DRM_COPY(name,value) \ len = strlen(value); \ if (len > name##_len) len = name##_len; \ name##_len = strlen(value); \ if (len && name) { \ copy_to_user_ret(name, value, len, -EFAULT); \ } 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); copy_to_user_ret((drm_version_t *)arg, &version, sizeof(version), -EFAULT); return 0; } int mga_open(struct inode *inode, struct file *filp) { drm_device_t *dev = &mga_device; int retcode = 0; DRM_DEBUG("open_count = %d\n", dev->open_count); if (!(retcode = drm_open_helper(inode, filp, dev))) { MOD_INC_USE_COUNT; atomic_inc(&dev->total_open); spin_lock(&dev->count_lock); if (!dev->open_count++) { spin_unlock(&dev->count_lock); return mga_setup(dev); } spin_unlock(&dev->count_lock); } return retcode; } int mga_release(struct inode *inode, struct file *filp) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; int retcode = 0; DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n", current->pid, dev->device, dev->open_count); if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) && dev->lock.pid == current->pid) { mga_reclaim_buffers(dev, priv->pid); DRM_ERROR("Process %d dead, freeing lock for context %d\n", current->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 */ DECLARE_WAITQUEUE(entry, current); add_wait_queue(&dev->lock.lock_queue, &entry); 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 = priv->pid; dev->lock.lock_time = jiffies; atomic_inc(&dev->total_locks); break; /* Got lock */ } /* Contention */ atomic_inc(&dev->total_sleeps); current->state = TASK_INTERRUPTIBLE; schedule(); if (signal_pending(current)) { retcode = -ERESTARTSYS; break; } } current->state = TASK_RUNNING; remove_wait_queue(&dev->lock.lock_queue, &entry); if(!retcode) { mga_reclaim_buffers(dev, priv->pid); drm_lock_free(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT); } } drm_fasync(-1, filp, 0); down(&dev->struct_sem); if (priv->prev) priv->prev->next = priv->next; else dev->file_first = priv->next; if (priv->next) priv->next->prev = priv->prev; else dev->file_last = priv->prev; up(&dev->struct_sem); drm_free(priv, sizeof(*priv), DRM_MEM_FILES); MOD_DEC_USE_COUNT; atomic_inc(&dev->total_close); spin_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); spin_unlock(&dev->count_lock); return -EBUSY; } spin_unlock(&dev->count_lock); return mga_takedown(dev); } spin_unlock(&dev->count_lock); return retcode; } /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm. */ int mga_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { int nr = DRM_IOCTL_NR(cmd); drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; int retcode = 0; drm_ioctl_desc_t *ioctl; drm_ioctl_t *func; atomic_inc(&dev->ioctl_count); atomic_inc(&dev->total_ioctl); ++priv->ioctl_count; DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n", current->pid, cmd, nr, dev->device, priv->authenticated); if (nr >= MGA_IOCTL_COUNT) { retcode = -EINVAL; } else { ioctl = &mga_ioctls[nr]; func = ioctl->func; if (!func) { DRM_DEBUG("no function\n"); retcode = -EINVAL; } else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN)) || (ioctl->auth_needed && !priv->authenticated)) { retcode = -EACCES; } else { retcode = (func)(inode, filp, cmd, arg); } } atomic_dec(&dev->ioctl_count); return retcode; } int mga_unlock(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_lock_t lock; copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT); if (lock.context == DRM_KERNEL_CONTEXT) { DRM_ERROR("Process %d using kernel context %d\n", current->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); mga_dma_schedule(dev, 1); if (drm_lock_free(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT)) { DRM_ERROR("\n"); } return 0; }