| /** |
| * \file drm_agpsupport.c |
| * DRM support for AGP/GART backend |
| * |
| * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| * \author Gareth Hughes <gareth@valinux.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 |
| * 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. |
| */ |
| |
| #include "drmP.h" |
| #include <linux/module.h> |
| |
| #if __OS_HAS_AGP |
| |
| /** |
| * Get AGP information. |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg pointer to a (output) drm_agp_info structure. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device has been initialized and acquired and fills in the |
| * drm_agp_info structure with the information in drm_agp_head::agp_info. |
| */ |
| int drm_agp_info(drm_device_t * dev, drm_agp_info_t * info) |
| { |
| DRM_AGP_KERN *kern; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return -EINVAL; |
| |
| kern = &dev->agp->agp_info; |
| info->agp_version_major = kern->version.major; |
| info->agp_version_minor = kern->version.minor; |
| info->mode = kern->mode; |
| info->aperture_base = kern->aper_base; |
| info->aperture_size = kern->aper_size * 1024 * 1024; |
| info->memory_allowed = kern->max_memory << PAGE_SHIFT; |
| info->memory_used = kern->current_memory << PAGE_SHIFT; |
| info->id_vendor = kern->device->vendor; |
| info->id_device = kern->device->device; |
| |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(drm_agp_info); |
| |
| int drm_agp_info_ioctl(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_agp_info_t info; |
| int err; |
| |
| err = drm_agp_info(dev, &info); |
| if (err) |
| return err; |
| |
| if (copy_to_user((drm_agp_info_t __user *) arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /** |
| * Acquire the AGP device. |
| * |
| * \param dev DRM device that is to acquire AGP. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device hasn't been acquired before and calls |
| * \c agp_backend_acquire. |
| */ |
| int drm_agp_acquire(drm_device_t * dev) |
| { |
| if (!dev->agp) |
| return -ENODEV; |
| if (dev->agp->acquired) |
| return -EBUSY; |
| if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev))) |
| return -ENODEV; |
| dev->agp->acquired = 1; |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(drm_agp_acquire); |
| |
| /** |
| * Acquire the AGP device (ioctl). |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg user argument. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device hasn't been acquired before and calls |
| * \c agp_backend_acquire. |
| */ |
| int drm_agp_acquire_ioctl(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| |
| return drm_agp_acquire((drm_device_t *) priv->head->dev); |
| } |
| |
| /** |
| * Release the AGP device. |
| * |
| * \param dev DRM device that is to release AGP. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device has been acquired and calls \c agp_backend_release. |
| */ |
| int drm_agp_release(drm_device_t * dev) |
| { |
| if (!dev->agp || !dev->agp->acquired) |
| return -EINVAL; |
| agp_backend_release(dev->agp->bridge); |
| dev->agp->acquired = 0; |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_agp_release); |
| |
| int drm_agp_release_ioctl(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; |
| |
| return drm_agp_release(dev); |
| } |
| |
| /** |
| * Enable the AGP bus. |
| * |
| * \param dev DRM device that has previously acquired AGP. |
| * \param mode Requested AGP mode. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device has been acquired but not enabled, and calls |
| * \c agp_enable. |
| */ |
| int drm_agp_enable(drm_device_t * dev, drm_agp_mode_t mode) |
| { |
| if (!dev->agp || !dev->agp->acquired) |
| return -EINVAL; |
| |
| dev->agp->mode = mode.mode; |
| agp_enable(dev->agp->bridge, mode.mode); |
| dev->agp->base = dev->agp->agp_info.aper_base; |
| dev->agp->enabled = 1; |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(drm_agp_enable); |
| |
| int drm_agp_enable_ioctl(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_agp_mode_t mode; |
| |
| if (copy_from_user(&mode, (drm_agp_mode_t __user *) arg, sizeof(mode))) |
| return -EFAULT; |
| |
| return drm_agp_enable(dev, mode); |
| } |
| |
| /** |
| * Allocate AGP memory. |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg pointer to a drm_agp_buffer structure. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device is present and has been acquired, allocates the |
| * memory via alloc_agp() and creates a drm_agp_mem entry for it. |
| */ |
| int drm_agp_alloc(drm_device_t *dev, drm_agp_buffer_t *request) |
| { |
| drm_agp_mem_t *entry; |
| DRM_AGP_MEM *memory; |
| unsigned long pages; |
| u32 type; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return -EINVAL; |
| if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS))) |
| return -ENOMEM; |
| |
| memset(entry, 0, sizeof(*entry)); |
| |
| pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; |
| type = (u32) request->type; |
| if (!(memory = drm_alloc_agp(dev, pages, type))) { |
| drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
| return -ENOMEM; |
| } |
| |
| entry->handle = (unsigned long)memory->key + 1; |
| entry->memory = memory; |
| entry->bound = 0; |
| entry->pages = pages; |
| list_add(&entry->head, &dev->agp->memory); |
| |
| request->handle = entry->handle; |
| request->physical = memory->physical; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_agp_alloc); |
| |
| int drm_agp_alloc_ioctl(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_agp_buffer_t request; |
| drm_agp_buffer_t __user *argp = (void __user *)arg; |
| int err; |
| |
| if (copy_from_user(&request, argp, sizeof(request))) |
| return -EFAULT; |
| |
| err = drm_agp_alloc(dev, &request); |
| if (err) |
| return err; |
| |
| if (copy_to_user(argp, &request, sizeof(request))) { |
| drm_agp_mem_t *entry; |
| list_for_each_entry(entry, &dev->agp->memory, head) { |
| if (entry->handle == request.handle) |
| break; |
| } |
| list_del(&entry->head); |
| drm_free_agp(entry->memory, entry->pages); |
| drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Search for the AGP memory entry associated with a handle. |
| * |
| * \param dev DRM device structure. |
| * \param handle AGP memory handle. |
| * \return pointer to the drm_agp_mem structure associated with \p handle. |
| * |
| * Walks through drm_agp_head::memory until finding a matching handle. |
| */ |
| static drm_agp_mem_t *drm_agp_lookup_entry(drm_device_t * dev, |
| unsigned long handle) |
| { |
| drm_agp_mem_t *entry; |
| |
| list_for_each_entry(entry, &dev->agp->memory, head) { |
| if (entry->handle == handle) |
| return entry; |
| } |
| return NULL; |
| } |
| |
| /** |
| * Unbind AGP memory from the GATT (ioctl). |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg pointer to a drm_agp_binding structure. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device is present and acquired, looks-up the AGP memory |
| * entry and passes it to the unbind_agp() function. |
| */ |
| int drm_agp_unbind(drm_device_t *dev, drm_agp_binding_t *request) |
| { |
| drm_agp_mem_t *entry; |
| int ret; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return -EINVAL; |
| if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
| return -EINVAL; |
| if (!entry->bound) |
| return -EINVAL; |
| ret = drm_unbind_agp(entry->memory); |
| if (ret == 0) |
| entry->bound = 0; |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_agp_unbind); |
| |
| int drm_agp_unbind_ioctl(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_agp_binding_t request; |
| |
| if (copy_from_user |
| (&request, (drm_agp_binding_t __user *) arg, sizeof(request))) |
| return -EFAULT; |
| |
| return drm_agp_unbind(dev, &request); |
| } |
| |
| /** |
| * Bind AGP memory into the GATT (ioctl) |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg pointer to a drm_agp_binding structure. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device is present and has been acquired and that no memory |
| * is currently bound into the GATT. Looks-up the AGP memory entry and passes |
| * it to bind_agp() function. |
| */ |
| int drm_agp_bind(drm_device_t *dev, drm_agp_binding_t *request) |
| { |
| drm_agp_mem_t *entry; |
| int retcode; |
| int page; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return -EINVAL; |
| if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
| return -EINVAL; |
| if (entry->bound) |
| return -EINVAL; |
| page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; |
| if ((retcode = drm_bind_agp(entry->memory, page))) |
| return retcode; |
| entry->bound = dev->agp->base + (page << PAGE_SHIFT); |
| DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n", |
| dev->agp->base, entry->bound); |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_agp_bind); |
| |
| int drm_agp_bind_ioctl(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_agp_binding_t request; |
| |
| if (copy_from_user |
| (&request, (drm_agp_binding_t __user *) arg, sizeof(request))) |
| return -EFAULT; |
| |
| return drm_agp_bind(dev, &request); |
| } |
| |
| /** |
| * Free AGP memory (ioctl). |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg pointer to a drm_agp_buffer structure. |
| * \return zero on success or a negative number on failure. |
| * |
| * Verifies the AGP device is present and has been acquired and looks up the |
| * AGP memory entry. If the memory it's currently bound, unbind it via |
| * unbind_agp(). Frees it via free_agp() as well as the entry itself |
| * and unlinks from the doubly linked list it's inserted in. |
| */ |
| int drm_agp_free(drm_device_t *dev, drm_agp_buffer_t *request) |
| { |
| drm_agp_mem_t *entry; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return -EINVAL; |
| if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
| return -EINVAL; |
| if (entry->bound) |
| drm_unbind_agp(entry->memory); |
| |
| list_del(&entry->head); |
| |
| drm_free_agp(entry->memory, entry->pages); |
| drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_agp_free); |
| |
| int drm_agp_free_ioctl(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_agp_buffer_t request; |
| |
| if (copy_from_user |
| (&request, (drm_agp_buffer_t __user *) arg, sizeof(request))) |
| return -EFAULT; |
| |
| return drm_agp_free(dev, &request); |
| } |
| |
| /** |
| * Initialize the AGP resources. |
| * |
| * \return pointer to a drm_agp_head structure. |
| * |
| * Gets the drm_agp_t structure which is made available by the agpgart module |
| * via the inter_module_* functions. Creates and initializes a drm_agp_head |
| * structure. |
| */ |
| drm_agp_head_t *drm_agp_init(drm_device_t * dev) |
| { |
| drm_agp_head_t *head = NULL; |
| |
| if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS))) |
| return NULL; |
| memset((void *)head, 0, sizeof(*head)); |
| head->bridge = agp_find_bridge(dev->pdev); |
| if (!head->bridge) { |
| if (!(head->bridge = agp_backend_acquire(dev->pdev))) { |
| drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS); |
| return NULL; |
| } |
| agp_copy_info(head->bridge, &head->agp_info); |
| agp_backend_release(head->bridge); |
| } else { |
| agp_copy_info(head->bridge, &head->agp_info); |
| } |
| if (head->agp_info.chipset == NOT_SUPPORTED) { |
| drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS); |
| return NULL; |
| } |
| INIT_LIST_HEAD(&head->memory); |
| head->cant_use_aperture = head->agp_info.cant_use_aperture; |
| head->page_mask = head->agp_info.page_mask; |
| |
| return head; |
| } |
| |
| /** Calls agp_allocate_memory() */ |
| DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data * bridge, |
| size_t pages, u32 type) |
| { |
| return agp_allocate_memory(bridge, pages, type); |
| } |
| |
| /** Calls agp_free_memory() */ |
| int drm_agp_free_memory(DRM_AGP_MEM * handle) |
| { |
| if (!handle) |
| return 0; |
| agp_free_memory(handle); |
| return 1; |
| } |
| |
| /** Calls agp_bind_memory() */ |
| int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start) |
| { |
| if (!handle) |
| return -EINVAL; |
| return agp_bind_memory(handle, start); |
| } |
| |
| /** Calls agp_unbind_memory() */ |
| int drm_agp_unbind_memory(DRM_AGP_MEM * handle) |
| { |
| if (!handle) |
| return -EINVAL; |
| return agp_unbind_memory(handle); |
| } |
| |
| #endif /* __OS_HAS_AGP */ |