/* $Id: ffb_drv.c,v 1.14 2001/05/24 12:01:47 davem Exp $ * ffb_drv.c: Creator/Creator3D direct rendering driver. * * Copyright (C) 2000 David S. Miller (davem@redhat.com) */ #include "drmP.h" #include #include #include #include #include #include "ffb_drv.h" #define FFB_NAME "ffb" #define FFB_DESC "Creator/Creator3D" #define FFB_DATE "20000517" #define FFB_MAJOR 0 #define FFB_MINOR 0 #define FFB_PATCHLEVEL 1 /* Forward declarations. */ int ffb_init(void); void ffb_cleanup(void); static int ffb_version(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); static int ffb_open(struct inode *inode, struct file *filp); static int ffb_release(struct inode *inode, struct file *filp); static int ffb_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); static int ffb_lock(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); static int ffb_unlock(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); static int ffb_mmap(struct file *filp, struct vm_area_struct *vma); static unsigned long ffb_get_unmapped_area(struct file *, unsigned long, unsigned long, unsigned long, unsigned long); /* From ffb_context.c */ extern int ffb_resctx(struct inode *, struct file *, unsigned int, unsigned long); extern int ffb_addctx(struct inode *, struct file *, unsigned int, unsigned long); extern int ffb_modctx(struct inode *, struct file *, unsigned int, unsigned long); extern int ffb_getctx(struct inode *, struct file *, unsigned int, unsigned long); extern int ffb_switchctx(struct inode *, struct file *, unsigned int, unsigned long); extern int ffb_newctx(struct inode *, struct file *, unsigned int, unsigned long); extern int ffb_rmctx(struct inode *, struct file *, unsigned int, unsigned long); extern int ffb_context_switch(drm_device_t *, int, int); static struct file_operations ffb_fops = { owner: THIS_MODULE, open: ffb_open, flush: drm_flush, release: ffb_release, ioctl: ffb_ioctl, mmap: ffb_mmap, read: drm_read, fasync: drm_fasync, poll: drm_poll, get_unmapped_area: ffb_get_unmapped_area, }; /* This is just a template, we make a new copy for each FFB * we discover at init time so that each one gets a unique * misc device minor number. */ static struct miscdevice ffb_misc = { minor: MISC_DYNAMIC_MINOR, name: FFB_NAME, fops: &ffb_fops, }; static drm_ioctl_desc_t ffb_ioctls[] = { [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { ffb_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 }, /* XXX */ [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 }, /* The implementation is currently a nop just like on tdfx. * Later we can do something more clever. -DaveM */ [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { ffb_addctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { ffb_rmctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { ffb_modctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { ffb_getctx, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { ffb_switchctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { ffb_newctx, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { ffb_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)] = { ffb_lock, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { ffb_unlock, 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_finish, 1, 0 }, }; #define FFB_IOCTL_COUNT DRM_ARRAY_SIZE(ffb_ioctls) #ifdef MODULE static char *ffb = NULL; #endif MODULE_AUTHOR("David S. Miller (davem@redhat.com)"); MODULE_DESCRIPTION("Sun Creator/Creator3D DRI"); MODULE_LICENSE("GPL"); static int ffb_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 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: drm_ioremapfree(map->handle, map->size, dev); break; case _DRM_SHM: drm_free_pages((unsigned long)map->handle, drm_order(map->size) - PAGE_SHIFT, DRM_MEM_SAREA); break; default: 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; } drm_device_t **ffb_dev_table; static int ffb_dev_table_size; static void get_ffb_type(ffb_dev_priv_t *ffb_priv, int instance) { volatile unsigned char *strap_bits; unsigned char val; strap_bits = (volatile unsigned char *) (ffb_priv->card_phys_base + 0x00200000UL); /* Don't ask, you have to read the value twice for whatever * reason to get correct contents. */ val = upa_readb(strap_bits); val = upa_readb(strap_bits); switch (val & 0x78) { case (0x0 << 5) | (0x0 << 3): ffb_priv->ffb_type = ffb1_prototype; printk("ffb%d: Detected FFB1 pre-FCS prototype\n", instance); break; case (0x0 << 5) | (0x1 << 3): ffb_priv->ffb_type = ffb1_standard; printk("ffb%d: Detected FFB1\n", instance); break; case (0x0 << 5) | (0x3 << 3): ffb_priv->ffb_type = ffb1_speedsort; printk("ffb%d: Detected FFB1-SpeedSort\n", instance); break; case (0x1 << 5) | (0x0 << 3): ffb_priv->ffb_type = ffb2_prototype; printk("ffb%d: Detected FFB2/vertical pre-FCS prototype\n", instance); break; case (0x1 << 5) | (0x1 << 3): ffb_priv->ffb_type = ffb2_vertical; printk("ffb%d: Detected FFB2/vertical\n", instance); break; case (0x1 << 5) | (0x2 << 3): ffb_priv->ffb_type = ffb2_vertical_plus; printk("ffb%d: Detected FFB2+/vertical\n", instance); break; case (0x2 << 5) | (0x0 << 3): ffb_priv->ffb_type = ffb2_horizontal; printk("ffb%d: Detected FFB2/horizontal\n", instance); break; case (0x2 << 5) | (0x2 << 3): ffb_priv->ffb_type = ffb2_horizontal; printk("ffb%d: Detected FFB2+/horizontal\n", instance); break; default: ffb_priv->ffb_type = ffb2_vertical; printk("ffb%d: Unknown boardID[%08x], assuming FFB2\n", instance, val); break; }; } static void __init ffb_apply_upa_parent_ranges(int parent, struct linux_prom64_registers *regs) { struct linux_prom64_ranges ranges[PROMREG_MAX]; char name[128]; int len, i; prom_getproperty(parent, "name", name, sizeof(name)); if (strcmp(name, "upa") != 0) return; len = prom_getproperty(parent, "ranges", (void *) ranges, sizeof(ranges)); if (len <= 0) return; len /= sizeof(struct linux_prom64_ranges); for (i = 0; i < len; i++) { struct linux_prom64_ranges *rng = &ranges[i]; u64 phys_addr = regs->phys_addr; if (phys_addr >= rng->ot_child_base && phys_addr < (rng->ot_child_base + rng->or_size)) { regs->phys_addr -= rng->ot_child_base; regs->phys_addr += rng->ot_parent_base; return; } } return; } static int __init ffb_init_one(int prom_node, int parent_node, int instance) { struct linux_prom64_registers regs[2*PROMREG_MAX]; drm_device_t *dev; ffb_dev_priv_t *ffb_priv; int ret, i; dev = kmalloc(sizeof(drm_device_t) + sizeof(ffb_dev_priv_t), GFP_KERNEL); if (!dev) return -ENOMEM; memset(dev, 0, sizeof(*dev)); spin_lock_init(&dev->count_lock); sema_init(&dev->struct_sem, 1); ffb_priv = (ffb_dev_priv_t *) (dev + 1); ffb_priv->prom_node = prom_node; if (prom_getproperty(ffb_priv->prom_node, "reg", (void *)regs, sizeof(regs)) <= 0) { kfree(dev); return -EINVAL; } ffb_apply_upa_parent_ranges(parent_node, ®s[0]); ffb_priv->card_phys_base = regs[0].phys_addr; ffb_priv->regs = (ffb_fbcPtr) (regs[0].phys_addr + 0x00600000UL); get_ffb_type(ffb_priv, instance); for (i = 0; i < FFB_MAX_CTXS; i++) ffb_priv->hw_state[i] = NULL; ffb_dev_table[instance] = dev; #ifdef MODULE drm_parse_options(ffb); #endif memcpy(&ffb_priv->miscdev, &ffb_misc, sizeof(ffb_misc)); ret = misc_register(&ffb_priv->miscdev); if (ret) { ffb_dev_table[instance] = NULL; kfree(dev); return ret; } dev->device = MKDEV(MISC_MAJOR, ffb_priv->miscdev.minor); dev->name = FFB_NAME; drm_mem_init(); drm_proc_init(dev); DRM_INFO("Initialized %s %d.%d.%d %s on minor %d at %016lx\n", FFB_NAME, FFB_MAJOR, FFB_MINOR, FFB_PATCHLEVEL, FFB_DATE, ffb_priv->miscdev.minor, ffb_priv->card_phys_base); return 0; } static int __init ffb_count_siblings(int root) { int node, child, count = 0; child = prom_getchild(root); for (node = prom_searchsiblings(child, "SUNW,ffb"); node; node = prom_searchsiblings(prom_getsibling(node), "SUNW,ffb")) count++; return count; } static int __init ffb_init_dev_table(void) { int root, total; total = ffb_count_siblings(prom_root_node); root = prom_getchild(prom_root_node); for (root = prom_searchsiblings(root, "upa"); root; root = prom_searchsiblings(prom_getsibling(root), "upa")) total += ffb_count_siblings(root); if (!total) return -ENODEV; ffb_dev_table = kmalloc(sizeof(drm_device_t *) * total, GFP_KERNEL); if (!ffb_dev_table) return -ENOMEM; ffb_dev_table_size = total; return 0; } static int __init ffb_scan_siblings(int root, int instance) { int node, child; child = prom_getchild(root); for (node = prom_searchsiblings(child, "SUNW,ffb"); node; node = prom_searchsiblings(prom_getsibling(node), "SUNW,ffb")) { ffb_init_one(node, root, instance); instance++; } return instance; } int __init ffb_init(void) { int root, instance, ret; ret = ffb_init_dev_table(); if (ret) return ret; instance = ffb_scan_siblings(prom_root_node, 0); root = prom_getchild(prom_root_node); for (root = prom_searchsiblings(root, "upa"); root; root = prom_searchsiblings(prom_getsibling(root), "upa")) instance = ffb_scan_siblings(root, instance); return 0; } void __exit ffb_cleanup(void) { int instance; DRM_DEBUG("\n"); drm_proc_cleanup(); for (instance = 0; instance < ffb_dev_table_size; instance++) { drm_device_t *dev = ffb_dev_table[instance]; ffb_dev_priv_t *ffb_priv; if (!dev) continue; ffb_priv = (ffb_dev_priv_t *) (dev + 1); if (misc_deregister(&ffb_priv->miscdev)) { DRM_ERROR("Cannot unload module\n"); } else { DRM_INFO("Module unloaded\n"); } ffb_takedown(dev); kfree(dev); ffb_dev_table[instance] = NULL; } kfree(ffb_dev_table); ffb_dev_table = NULL; ffb_dev_table_size = 0; } static int ffb_version(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { drm_version_t version; int len, ret; ret = copy_from_user(&version, (drm_version_t *)arg, sizeof(version)); if (ret) return -EFAULT; version.version_major = FFB_MAJOR; version.version_minor = FFB_MINOR; version.version_patchlevel = FFB_PATCHLEVEL; len = strlen(FFB_NAME); if (len > version.name_len) len = version.name_len; version.name_len = len; if (len && version.name) { ret = copy_to_user(version.name, FFB_NAME, len); if (ret) return -EFAULT; } len = strlen(FFB_DATE); if (len > version.date_len) len = version.date_len; version.date_len = len; if (len && version.date) { ret = copy_to_user(version.date, FFB_DATE, len); if (ret) return -EFAULT; } len = strlen(FFB_DESC); if (len > version.desc_len) len = version.desc_len; version.desc_len = len; if (len && version.desc) { ret = copy_to_user(version.desc, FFB_DESC, len); if (ret) return -EFAULT; } ret = copy_to_user((drm_version_t *) arg, &version, sizeof(version)); if (ret) ret = -EFAULT; return ret; } static int ffb_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); return 0; } static int ffb_open(struct inode *inode, struct file *filp) { drm_device_t *dev; int minor, i; int ret = 0; minor = MINOR(inode->i_rdev); for (i = 0; i < ffb_dev_table_size; i++) { ffb_dev_priv_t *ffb_priv; ffb_priv = (ffb_dev_priv_t *) (ffb_dev_table[i] + 1); if (ffb_priv->miscdev.minor == minor) break; } if (i >= ffb_dev_table_size) return -EINVAL; dev = ffb_dev_table[i]; if (!dev) return -EINVAL; DRM_DEBUG("open_count = %d\n", dev->open_count); ret = drm_open_helper(inode, filp, dev); if (!ret) { atomic_inc(&dev->total_open); spin_lock(&dev->count_lock); if (!dev->open_count++) { spin_unlock(&dev->count_lock); return ffb_setup(dev); } spin_unlock(&dev->count_lock); } return ret; } static int ffb_release(struct inode *inode, struct file *filp) { drm_file_t *priv = filp->private_data; drm_device_t *dev; int ret = 0; lock_kernel(); dev = priv->dev; DRM_DEBUG("open_count = %d\n", dev->open_count); if (dev->lock.hw_lock != NULL && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) && dev->lock.pid == current->pid) { ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1); int context = _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock); int idx; /* We have to free up the rogue hw context state * holding error or else we will leak it. */ idx = context - 1; if (fpriv->hw_state[idx] != NULL) { kfree(fpriv->hw_state[idx]); fpriv->hw_state[idx] = NULL; } } ret = drm_release(inode, filp); if (!ret) { 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); unlock_kernel(); return -EBUSY; } spin_unlock(&dev->count_lock); ret = ffb_takedown(dev); unlock_kernel(); return ret; } spin_unlock(&dev->count_lock); } unlock_kernel(); return ret; } static int ffb_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; drm_ioctl_desc_t *ioctl; drm_ioctl_t *func; int ret; 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 >= FFB_IOCTL_COUNT) { ret = -EINVAL; } else { ioctl = &ffb_ioctls[nr]; func = ioctl->func; if (!func) { DRM_DEBUG("no function\n"); ret = -EINVAL; } else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN)) || (ioctl->auth_needed && !priv->authenticated)) { ret = -EACCES; } else { ret = (func)(inode, filp, cmd, arg); } } atomic_dec(&dev->ioctl_count); return ret; } static int ffb_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; ret = copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)); if (ret) return -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); 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; yield(); if (signal_pending(current)) { ret = -ERESTARTSYS; break; } } current->state = TASK_RUNNING; remove_wait_queue(&dev->lock.lock_queue, &entry); if (!ret) { sigemptyset(&dev->sigmask); sigaddset(&dev->sigmask, SIGSTOP); sigaddset(&dev->sigmask, SIGTSTP); sigaddset(&dev->sigmask, SIGTTIN); sigaddset(&dev->sigmask, SIGTTOU); dev->sigdata.context = lock.context; dev->sigdata.lock = dev->lock.hw_lock; block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask); if (dev->last_context != lock.context) ffb_context_switch(dev, dev->last_context, lock.context); } DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock"); return ret; } int ffb_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; unsigned int old, new, prev, ctx; int ret; ret = copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)); if (ret) return -EFAULT; if ((ctx = 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); /* We no longer really hold it, but if we are the next * agent to request it then we should just be able to * take it immediately and not eat the ioctl. */ dev->lock.pid = 0; { __volatile__ unsigned int *plock = &dev->lock.hw_lock->lock; do { old = *plock; new = ctx; prev = cmpxchg(plock, old, new); } while (prev != old); } wake_up_interruptible(&dev->lock.lock_queue); unblock_all_signals(); return 0; } extern struct vm_operations_struct drm_vm_ops; extern struct vm_operations_struct drm_vm_shm_ops; extern struct vm_operations_struct drm_vm_shm_lock_ops; static int ffb_mmap(struct file *filp, struct vm_area_struct *vma) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_map_t *map = NULL; ffb_dev_priv_t *ffb_priv; int i, minor; DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n", vma->vm_start, vma->vm_end, VM_OFFSET(vma)); minor = MINOR(filp->f_dentry->d_inode->i_rdev); ffb_priv = NULL; for (i = 0; i < ffb_dev_table_size; i++) { ffb_priv = (ffb_dev_priv_t *) (ffb_dev_table[i] + 1); if (ffb_priv->miscdev.minor == minor) break; } if (i >= ffb_dev_table_size) return -EINVAL; /* We don't support/need dma mappings, so... */ if (!VM_OFFSET(vma)) return -EINVAL; for (i = 0; i < dev->map_count; i++) { unsigned long off; map = dev->maplist[i]; /* Ok, a little hack to make 32-bit apps work. */ off = (map->offset & 0xffffffff); if (off == VM_OFFSET(vma)) break; } if (i >= dev->map_count) return -EINVAL; if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) return -EPERM; if (map->size != (vma->vm_end - vma->vm_start)) return -EINVAL; /* Set read-only attribute before mappings are created * so it works for fb/reg maps too. */ if (map->flags & _DRM_READ_ONLY) vma->vm_page_prot = __pgprot(pte_val(pte_wrprotect( __pte(pgprot_val(vma->vm_page_prot))))); switch (map->type) { case _DRM_FRAME_BUFFER: /* FALLTHROUGH */ case _DRM_REGISTERS: /* In order to handle 32-bit drm apps/xserver we * play a trick. The mappings only really specify * the 32-bit offset from the cards 64-bit base * address, and we just add in the base here. */ vma->vm_flags |= VM_IO; if (io_remap_page_range(vma->vm_start, ffb_priv->card_phys_base + VM_OFFSET(vma), vma->vm_end - vma->vm_start, vma->vm_page_prot, 0)) return -EAGAIN; vma->vm_ops = &drm_vm_ops; break; case _DRM_SHM: if (map->flags & _DRM_CONTAINS_LOCK) vma->vm_ops = &drm_vm_shm_lock_ops; else { vma->vm_ops = &drm_vm_shm_ops; vma->vm_private_data = (void *) map; } /* Don't let this area swap. Change when * DRM_KERNEL advisory is supported. */ vma->vm_flags |= VM_LOCKED; break; default: return -EINVAL; /* This should never happen. */ }; vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */ vma->vm_file = filp; /* Needed for drm_vm_open() */ drm_vm_open(vma); return 0; } static drm_map_t *ffb_find_map(struct file *filp, unsigned long off) { drm_file_t *priv = filp->private_data; drm_device_t *dev; drm_map_t *map; int i; if (!priv || (dev = priv->dev) == NULL) return NULL; for (i = 0; i < dev->map_count; i++) { unsigned long uoff; map = dev->maplist[i]; /* Ok, a little hack to make 32-bit apps work. */ uoff = (map->offset & 0xffffffff); if (uoff == off) return map; } return NULL; } static unsigned long ffb_get_unmapped_area(struct file *filp, unsigned long hint, unsigned long len, unsigned long pgoff, unsigned long flags) { drm_map_t *map = ffb_find_map(filp, pgoff << PAGE_SHIFT); unsigned long addr = -ENOMEM; if (!map) return get_unmapped_area(NULL, hint, len, pgoff, flags); if (map->type == _DRM_FRAME_BUFFER || map->type == _DRM_REGISTERS) { #ifdef HAVE_ARCH_FB_UNMAPPED_AREA addr = get_fb_unmapped_area(filp, hint, len, pgoff, flags); #else addr = get_unmapped_area(NULL, hint, len, pgoff, flags); #endif } else if (map->type == _DRM_SHM && SHMLBA > PAGE_SIZE) { unsigned long slack = SHMLBA - PAGE_SIZE; addr = get_unmapped_area(NULL, hint, len + slack, pgoff, flags); if (!(addr & ~PAGE_MASK)) { unsigned long kvirt = (unsigned long) map->handle; if ((kvirt & (SHMLBA - 1)) != (addr & (SHMLBA - 1))) { unsigned long koff, aoff; koff = kvirt & (SHMLBA - 1); aoff = addr & (SHMLBA - 1); if (koff < aoff) koff += SHMLBA; addr += (koff - aoff); } } } else { addr = get_unmapped_area(NULL, hint, len, pgoff, flags); } return addr; } module_init(ffb_init); module_exit(ffb_cleanup);