diff options
Diffstat (limited to 'drivers/gpu/drm/drm_agpsupport.c')
| -rw-r--r-- | drivers/gpu/drm/drm_agpsupport.c | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c new file mode 100644 index 000000000000..aefa5ac4c0b1 --- /dev/null +++ b/drivers/gpu/drm/drm_agpsupport.c @@ -0,0 +1,455 @@ +/** + * \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 file_priv DRM file private. + * \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(struct drm_device *dev, struct drm_agp_info *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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_info *info = data; + int err; + + err = drm_agp_info(dev, info); + if (err) + return err; + + 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(struct drm_device * 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 file_priv DRM file private. + * \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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + return drm_agp_acquire((struct drm_device *) file_priv->minor->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(struct drm_device * 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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + 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(struct drm_device * dev, struct drm_agp_mode mode) +{ + if (!dev->agp || !dev->agp->acquired) + return -EINVAL; + + dev->agp->mode = mode.mode; + agp_enable(dev->agp->bridge, mode.mode); + dev->agp->enabled = 1; + return 0; +} + +EXPORT_SYMBOL(drm_agp_enable); + +int drm_agp_enable_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_mode *mode = data; + + return drm_agp_enable(dev, *mode); +} + +/** + * Allocate AGP memory. + * + * \param inode device inode. + * \param file_priv file private 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(struct drm_device *dev, struct drm_agp_buffer *request) +{ + struct drm_agp_mem *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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_buffer *request = data; + + return drm_agp_alloc(dev, request); +} + +/** + * 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 struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev, + unsigned long handle) +{ + struct drm_agp_mem *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 file_priv DRM file private. + * \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(struct drm_device *dev, struct drm_agp_binding *request) +{ + struct drm_agp_mem *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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_binding *request = data; + + return drm_agp_unbind(dev, request); +} + +/** + * Bind AGP memory into the GATT (ioctl) + * + * \param inode device inode. + * \param file_priv DRM file private. + * \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(struct drm_device *dev, struct drm_agp_binding *request) +{ + struct drm_agp_mem *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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_binding *request = data; + + return drm_agp_bind(dev, request); +} + +/** + * Free AGP memory (ioctl). + * + * \param inode device inode. + * \param file_priv DRM file private. + * \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(struct drm_device *dev, struct drm_agp_buffer *request) +{ + struct drm_agp_mem *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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_buffer *request = data; + + 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. + */ +struct drm_agp_head *drm_agp_init(struct drm_device *dev) +{ + struct drm_agp_head *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; + head->base = head->agp_info.aper_base; + 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 */ |