diff options
Diffstat (limited to 'linux/tdfx_drv.c')
| -rw-r--r-- | linux/tdfx_drv.c | 653 |
1 files changed, 653 insertions, 0 deletions
diff --git a/linux/tdfx_drv.c b/linux/tdfx_drv.c new file mode 100644 index 00000000..da1a3540 --- /dev/null +++ b/linux/tdfx_drv.c @@ -0,0 +1,653 @@ +/* tdfx.c -- tdfx driver -*- linux-c -*- + * Created: Thu Oct 7 10:38:32 1999 by faith@precisioninsight.com + * Revised: Tue Oct 12 08:51:35 1999 by faith@precisioninsight.com + * + * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. + * 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. + * + * $PI$ + * $XFree86$ + * + */ + +#define EXPORT_SYMTAB +#include "drmP.h" +#include "tdfx_drv.h" +EXPORT_SYMBOL(tdfx_init); +EXPORT_SYMBOL(tdfx_cleanup); + +#define TDFX_NAME "tdfx" +#define TDFX_DESC "tdfx" +#define TDFX_DATE "19991009" +#define TDFX_MAJOR 0 +#define TDFX_MINOR 0 +#define TDFX_PATCHLEVEL 1 + +static drm_device_t tdfx_device; +drm_ctx_t tdfx_res_ctx; + +static struct file_operations tdfx_fops = { + open: tdfx_open, + flush: drm_flush, + release: tdfx_release, + ioctl: tdfx_ioctl, + mmap: drm_mmap, + read: drm_read, + fasync: drm_fasync, +}; + +static struct miscdevice tdfx_misc = { + minor: MISC_DYNAMIC_MINOR, + name: TDFX_NAME, + fops: &tdfx_fops, +}; + +static drm_ioctl_desc_t tdfx_ioctls[] = { + [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { tdfx_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_AUTH_MAGIC)] = { drm_authmagic, 1, 1 }, + [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 }, + + [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { tdfx_addctx, 1, 1 }, + [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { tdfx_rmctx, 1, 1 }, + [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { tdfx_modctx, 1, 1 }, + [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { tdfx_getctx, 1, 0 }, + [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { tdfx_switchctx, 1, 1 }, + [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { tdfx_newctx, 1, 1 }, + [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { tdfx_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_LOCK)] = { tdfx_lock, 1, 0 }, + [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { tdfx_unlock, 1, 0 }, + [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_finish, 1, 0 }, +}; +#define TDFX_IOCTL_COUNT DRM_ARRAY_SIZE(tdfx_ioctls) + +#ifdef MODULE +int init_module(void); +void cleanup_module(void); +static char *tdfx = NULL; + +MODULE_AUTHOR("Precision Insight, Inc., Cedar Park, Texas."); +MODULE_DESCRIPTION("tdfx"); +MODULE_PARM(tdfx, "s"); + +/* init_module is called when insmod is used to load the module */ + +int init_module(void) +{ + return tdfx_init(); +} + +/* cleanup_module is called when rmmod is used to unload the module */ + +void cleanup_module(void) +{ + tdfx_cleanup(); +} +#endif + +#ifndef MODULE +/* tdfx_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 tdfx_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 tdfx_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); + + 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 = 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); + + tdfx_res_ctx.handle=-1; + + 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 tdfx_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"); + + 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 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; + } + 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->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; +} + +/* tdfx_init is called via init_module at module load time, or via + * linux/init/main.c (this is not currently supported). */ + +int tdfx_init(void) +{ + int retcode; + drm_device_t *dev = &tdfx_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(tdfx); +#endif + + if ((retcode = misc_register(&tdfx_misc))) { + DRM_ERROR("Cannot register \"%s\"\n", TDFX_NAME); + return retcode; + } + dev->device = MKDEV(MISC_MAJOR, tdfx_misc.minor); + dev->name = TDFX_NAME; + + drm_mem_init(); + drm_proc_init(dev); + + DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", + TDFX_NAME, + TDFX_MAJOR, + TDFX_MINOR, + TDFX_PATCHLEVEL, + TDFX_DATE, + tdfx_misc.minor); + + return 0; +} + +/* tdfx_cleanup is called via cleanup_module at module unload time. */ + +void tdfx_cleanup(void) +{ + drm_device_t *dev = &tdfx_device; + + DRM_DEBUG("\n"); + + drm_proc_cleanup(); + if (misc_deregister(&tdfx_misc)) { + DRM_ERROR("Cannot unload module\n"); + } else { + DRM_INFO("Module unloaded\n"); + } + tdfx_takedown(dev); +} + +int tdfx_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 = TDFX_MAJOR; + version.version_minor = TDFX_MINOR; + version.version_patchlevel = TDFX_PATCHLEVEL; + + DRM_COPY(version.name, TDFX_NAME); + DRM_COPY(version.date, TDFX_DATE); + DRM_COPY(version.desc, TDFX_DESC); + + copy_to_user_ret((drm_version_t *)arg, + &version, + sizeof(version), + -EFAULT); + return 0; +} + +int tdfx_open(struct inode *inode, struct file *filp) +{ + drm_device_t *dev = &tdfx_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 tdfx_setup(dev); + } + spin_unlock(&dev->count_lock); + } + return retcode; +} + +int tdfx_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("open_count = %d\n", dev->open_count); + if (!(retcode = drm_release(inode, filp))) { + 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 tdfx_takedown(dev); + } + spin_unlock(&dev->count_lock); + } + return retcode; +} + +/* tdfx_ioctl is called whenever a process performs an ioctl on /dev/drm. */ + +int tdfx_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 >= 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 && !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 tdfx_lock(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; + DECLARE_WAITQUEUE(entry, current); + int ret = 0; + drm_lock_t lock; +#if DRM_DMA_HISTOGRAM + cycles_t start; + + dev->lck_start = start = get_cycles(); +#endif + + 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 (pid %d) requests lock (0x%08x), flags = 0x%08x\n", + lock.context, current->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 = jiffies - 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 jiffies=%d\n", + lock.context, current->pid, j, + dev->lock.lock_time, jiffies); + current->state = TASK_INTERRUPTIBLE; + current->policy |= SCHED_YIELD; + schedule_timeout(DRM_LOCK_SLICE-j); + DRM_DEBUG("jiffies=%d\n", jiffies); + } + } +#endif + add_wait_queue(&dev->lock.lock_queue, &entry); + 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 = current->pid; + dev->lock.lock_time = jiffies; + atomic_inc(&dev->total_locks); + break; /* Got lock */ + } + + /* Contention */ + atomic_inc(&dev->total_sleeps); + current->state = TASK_INTERRUPTIBLE; +#if 1 + current->policy |= SCHED_YIELD; +#endif + schedule(); + if (signal_pending(current)) { + ret = -ERESTARTSYS; + break; + } + } + current->state = TASK_RUNNING; + remove_wait_queue(&dev->lock.lock_queue, &entry); + } + +#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", + current->pid, current->counter); +#endif + if (lock.context != tdfx_res_ctx.handle) { + current->counter = 5; + current->priority = DEF_PRIORITY/4; + } +#if 0 + while (current->counter > 25) + current->counter >>= 1; /* decrease time slice */ + DRM_ERROR("pid = %5d, new counter = %5ld\n", + current->pid, current->counter); +#endif + DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock"); + +#if DRM_DMA_HISTOGRAM + atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]); +#endif + + return ret; +} + + +int tdfx_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); + /* 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"); + } + } + +#if 0 + current->policy |= SCHED_YIELD; + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(1000); +#endif + + if (lock.context != tdfx_res_ctx.handle) { + current->counter = 5; + current->priority = DEF_PRIORITY; + } +#if 0 + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(10); +#endif + + return 0; +} |