diff options
Diffstat (limited to 'nx-X11/extras/drm/linux-core/drm_context.c')
| -rw-r--r-- | nx-X11/extras/drm/linux-core/drm_context.c | 590 |
1 files changed, 0 insertions, 590 deletions
diff --git a/nx-X11/extras/drm/linux-core/drm_context.c b/nx-X11/extras/drm/linux-core/drm_context.c deleted file mode 100644 index 5947c8e6d..000000000 --- a/nx-X11/extras/drm/linux-core/drm_context.c +++ /dev/null @@ -1,590 +0,0 @@ -/** - * \file drm_context.c - * IOCTLs for generic contexts - * - * \author Rickard E. (Rik) Faith <faith@valinux.com> - * \author Gareth Hughes <gareth@valinux.com> - */ - -/* - * Created: Fri Nov 24 18:31:37 2000 by gareth@valinux.com - * - * Copyright 1999, 2000 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 - * VA LINUX SYSTEMS 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. - */ - -/* - * ChangeLog: - * 2001-11-16 Torsten Duwe <duwe@caldera.de> - * added context constructor/destructor hooks, - * needed by SiS driver's memory management. - */ - -#include "drmP.h" - -/******************************************************************/ -/** \name Context bitmap support */ -/*@{*/ - -/** - * Free a handle from the context bitmap. - * - * \param dev DRM device. - * \param ctx_handle context handle. - * - * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry - * in drm_device::context_sareas, while holding the drm_device::struct_sem - * lock. - */ -void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle) -{ - if (ctx_handle < 0) - goto failed; - if (!dev->ctx_bitmap) - goto failed; - - if (ctx_handle < DRM_MAX_CTXBITMAP) { - down(&dev->struct_sem); - clear_bit(ctx_handle, dev->ctx_bitmap); - dev->context_sareas[ctx_handle] = NULL; - up(&dev->struct_sem); - return; - } - failed: - DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle); - return; -} - -/** - * Context bitmap allocation. - * - * \param dev DRM device. - * \return (non-negative) context handle on success or a negative number on failure. - * - * Find the first zero bit in drm_device::ctx_bitmap and (re)allocates - * drm_device::context_sareas to accommodate the new entry while holding the - * drm_device::struct_sem lock. - */ -static int drm_ctxbitmap_next(drm_device_t * dev) -{ - int bit; - - if (!dev->ctx_bitmap) - return -1; - - down(&dev->struct_sem); - bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP); - if (bit < DRM_MAX_CTXBITMAP) { - set_bit(bit, dev->ctx_bitmap); - DRM_DEBUG("drm_ctxbitmap_next bit : %d\n", bit); - if ((bit + 1) > dev->max_context) { - dev->max_context = (bit + 1); - if (dev->context_sareas) { - drm_map_t **ctx_sareas; - - ctx_sareas = drm_realloc(dev->context_sareas, - (dev->max_context - - 1) * - sizeof(*dev-> - context_sareas), - dev->max_context * - sizeof(*dev-> - context_sareas), - DRM_MEM_MAPS); - if (!ctx_sareas) { - clear_bit(bit, dev->ctx_bitmap); - up(&dev->struct_sem); - return -1; - } - dev->context_sareas = ctx_sareas; - dev->context_sareas[bit] = NULL; - } else { - /* max_context == 1 at this point */ - dev->context_sareas = - drm_alloc(dev->max_context * - sizeof(*dev->context_sareas), - DRM_MEM_MAPS); - if (!dev->context_sareas) { - clear_bit(bit, dev->ctx_bitmap); - up(&dev->struct_sem); - return -1; - } - dev->context_sareas[bit] = NULL; - } - } - up(&dev->struct_sem); - return bit; - } - up(&dev->struct_sem); - return -1; -} - -/** - * Context bitmap initialization. - * - * \param dev DRM device. - * - * Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding - * the drm_device::struct_sem lock. - */ -int drm_ctxbitmap_init(drm_device_t * dev) -{ - int i; - int temp; - - down(&dev->struct_sem); - dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE, - DRM_MEM_CTXBITMAP); - if (dev->ctx_bitmap == NULL) { - up(&dev->struct_sem); - return -ENOMEM; - } - memset((void *)dev->ctx_bitmap, 0, PAGE_SIZE); - dev->context_sareas = NULL; - dev->max_context = -1; - up(&dev->struct_sem); - - for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { - temp = drm_ctxbitmap_next(dev); - DRM_DEBUG("drm_ctxbitmap_init : %d\n", temp); - } - - return 0; -} - -/** - * Context bitmap cleanup. - * - * \param dev DRM device. - * - * Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding - * the drm_device::struct_sem lock. - */ -void drm_ctxbitmap_cleanup(drm_device_t * dev) -{ - down(&dev->struct_sem); - if (dev->context_sareas) - drm_free(dev->context_sareas, - sizeof(*dev->context_sareas) * - dev->max_context, DRM_MEM_MAPS); - drm_free((void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP); - up(&dev->struct_sem); -} - -/*@}*/ - -/******************************************************************/ -/** \name Per Context SAREA Support */ -/*@{*/ - -/** - * Get per-context SAREA. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx_priv_map structure. - * \return zero on success or a negative number on failure. - * - * Gets the map from drm_device::context_sareas with the handle specified and - * returns its handle. - */ -int drm_getsareactx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_ctx_priv_map_t __user *argp = (void __user *)arg; - drm_ctx_priv_map_t request; - drm_map_t *map; - drm_map_list_t *_entry; - - if (copy_from_user(&request, argp, sizeof(request))) - return -EFAULT; - - down(&dev->struct_sem); - if (dev->max_context < 0 - || request.ctx_id >= (unsigned)dev->max_context) { - up(&dev->struct_sem); - return -EINVAL; - } - - map = dev->context_sareas[request.ctx_id]; - up(&dev->struct_sem); - - request.handle = 0; - list_for_each_entry(_entry, &dev->maplist->head,head) { - if (_entry->map == map) { - request.handle = (void *)(unsigned long)_entry->user_token; - break; - } - } - if (request.handle == 0) - return -EINVAL; - - if (copy_to_user(argp, &request, sizeof(request))) - return -EFAULT; - return 0; -} - -/** - * Set per-context SAREA. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx_priv_map structure. - * \return zero on success or a negative number on failure. - * - * Searches the mapping specified in \p arg and update the entry in - * drm_device::context_sareas with it. - */ -int drm_setsareactx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_ctx_priv_map_t request; - drm_map_t *map = NULL; - drm_map_list_t *r_list = NULL; - struct list_head *list; - - if (copy_from_user(&request, - (drm_ctx_priv_map_t __user *) arg, sizeof(request))) - return -EFAULT; - - down(&dev->struct_sem); - list_for_each(list, &dev->maplist->head) { - r_list = list_entry(list, drm_map_list_t, head); - if (r_list->map - && r_list->user_token == (unsigned long) request.handle) - goto found; - } - bad: - up(&dev->struct_sem); - return -EINVAL; - - found: - map = r_list->map; - if (!map) - goto bad; - if (dev->max_context < 0) - goto bad; - if (request.ctx_id >= (unsigned)dev->max_context) - goto bad; - dev->context_sareas[request.ctx_id] = map; - up(&dev->struct_sem); - return 0; -} - -/*@}*/ - -/******************************************************************/ -/** \name The actual DRM context handling routines */ -/*@{*/ - -/** - * Switch context. - * - * \param dev DRM device. - * \param old old context handle. - * \param new new context handle. - * \return zero on success or a negative number on failure. - * - * Attempt to set drm_device::context_flag. - */ -static int drm_context_switch(drm_device_t * dev, int old, int new) -{ - if (test_and_set_bit(0, &dev->context_flag)) { - DRM_ERROR("Reentering -- FIXME\n"); - return -EBUSY; - } - - DRM_DEBUG("Context switch from %d to %d\n", old, new); - - if (new == dev->last_context) { - clear_bit(0, &dev->context_flag); - return 0; - } - - return 0; -} - -/** - * Complete context switch. - * - * \param dev DRM device. - * \param new new context handle. - * \return zero on success or a negative number on failure. - * - * Updates drm_device::last_context and drm_device::last_switch. Verifies the - * hardware lock is held, clears the drm_device::context_flag and wakes up - * drm_device::context_wait. - */ -int drm_context_switch_complete(drm_device_t * dev, int new) -{ - dev->last_context = new; /* PRE/POST: This is the _only_ writer. */ - dev->last_switch = jiffies; - - if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) { - DRM_ERROR("Lock isn't held after context switch\n"); - } - - /* If a context switch is ever initiated - when the kernel holds the lock, release - that lock here. */ - clear_bit(0, &dev->context_flag); - wake_up(&dev->context_wait); - - return 0; -} - -/** - * Reserve contexts. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx_res structure. - * \return zero on success or a negative number on failure. - */ -int drm_resctx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_ctx_res_t res; - drm_ctx_t __user *argp = (void __user *)arg; - drm_ctx_t ctx; - int i; - - if (copy_from_user(&res, argp, sizeof(res))) - return -EFAULT; - - if (res.count >= DRM_RESERVED_CONTEXTS) { - memset(&ctx, 0, sizeof(ctx)); - for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { - ctx.handle = i; - if (copy_to_user(&res.contexts[i], &ctx, sizeof(ctx))) - return -EFAULT; - } - } - res.count = DRM_RESERVED_CONTEXTS; - - if (copy_to_user(argp, &res, sizeof(res))) - return -EFAULT; - return 0; -} - -/** - * Add context. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx structure. - * \return zero on success or a negative number on failure. - * - * Get a new handle for the context and copy to userspace. - */ -int drm_addctx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_ctx_list_t *ctx_entry; - drm_ctx_t __user *argp = (void __user *)arg; - drm_ctx_t ctx; - - if (copy_from_user(&ctx, argp, sizeof(ctx))) - return -EFAULT; - - ctx.handle = drm_ctxbitmap_next(dev); - if (ctx.handle == DRM_KERNEL_CONTEXT) { - /* Skip kernel's context and get a new one. */ - ctx.handle = drm_ctxbitmap_next(dev); - } - DRM_DEBUG("%d\n", ctx.handle); - if (ctx.handle == -1) { - DRM_DEBUG("Not enough free contexts.\n"); - /* Should this return -EBUSY instead? */ - return -ENOMEM; - } - - if (ctx.handle != DRM_KERNEL_CONTEXT) { - if (dev->driver->context_ctor) - dev->driver->context_ctor(dev, ctx.handle); - } - - ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST); - if (!ctx_entry) { - DRM_DEBUG("out of memory\n"); - return -ENOMEM; - } - - INIT_LIST_HEAD(&ctx_entry->head); - ctx_entry->handle = ctx.handle; - ctx_entry->tag = priv; - - down(&dev->ctxlist_sem); - list_add(&ctx_entry->head, &dev->ctxlist->head); - ++dev->ctx_count; - up(&dev->ctxlist_sem); - - if (copy_to_user(argp, &ctx, sizeof(ctx))) - return -EFAULT; - return 0; -} - -int drm_modctx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - /* This does nothing */ - return 0; -} - -/** - * Get context. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx structure. - * \return zero on success or a negative number on failure. - */ -int drm_getctx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_ctx_t __user *argp = (void __user *)arg; - drm_ctx_t ctx; - - if (copy_from_user(&ctx, argp, sizeof(ctx))) - return -EFAULT; - - /* This is 0, because we don't handle any context flags */ - ctx.flags = 0; - - if (copy_to_user(argp, &ctx, sizeof(ctx))) - return -EFAULT; - return 0; -} - -/** - * Switch context. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx structure. - * \return zero on success or a negative number on failure. - * - * Calls context_switch(). - */ -int drm_switchctx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_ctx_t ctx; - - if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx))) - return -EFAULT; - - DRM_DEBUG("%d\n", ctx.handle); - return drm_context_switch(dev, dev->last_context, ctx.handle); -} - -/** - * New context. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx structure. - * \return zero on success or a negative number on failure. - * - * Calls context_switch_complete(). - */ -int drm_newctx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_ctx_t ctx; - - if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx))) - return -EFAULT; - - DRM_DEBUG("%d\n", ctx.handle); - drm_context_switch_complete(dev, ctx.handle); - - return 0; -} - -/** - * Remove context. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument pointing to a drm_ctx structure. - * \return zero on success or a negative number on failure. - * - * If not the special kernel context, calls ctxbitmap_free() to free the specified context. - */ -int drm_rmctx(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_ctx_t ctx; - - if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx))) - return -EFAULT; - - DRM_DEBUG("%d\n", ctx.handle); - if (ctx.handle == DRM_KERNEL_CONTEXT + 1) { - priv->remove_auth_on_close = 1; - } - if (ctx.handle != DRM_KERNEL_CONTEXT) { - if (dev->driver->context_dtor) - dev->driver->context_dtor(dev, ctx.handle); - drm_ctxbitmap_free(dev, ctx.handle); - } - - down(&dev->ctxlist_sem); - if (!list_empty(&dev->ctxlist->head)) { - drm_ctx_list_t *pos, *n; - - list_for_each_entry_safe(pos, n, &dev->ctxlist->head, head) { - if (pos->handle == ctx.handle) { - list_del(&pos->head); - drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST); - --dev->ctx_count; - } - } - } - up(&dev->ctxlist_sem); - - return 0; -} - -/*@}*/ |