From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/drm_agpsupport.c | 451 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 451 insertions(+) create mode 100644 drivers/gpu/drm/drm_agpsupport.c (limited to 'drivers/gpu/drm/drm_agpsupport.c') diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c new file mode 100644 index 000000000..a4ad6fd13 --- /dev/null +++ b/drivers/gpu/drm/drm_agpsupport.c @@ -0,0 +1,451 @@ +/* + * \file drm_agpsupport.c + * DRM support for AGP/GART backend + * + * \author Rickard E. (Rik) Faith + * \author Gareth Hughes + */ + +/* + * 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 +#include +#include + +#if IS_ENABLED(CONFIG_AGP) +#include +#endif + +#include +#include +#include +#include + +#include "drm_legacy.h" + +#if IS_ENABLED(CONFIG_AGP) + +/* + * Get AGP information. + * + * \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_legacy_agp_info(struct drm_device *dev, struct drm_agp_info *info) +{ + struct agp_kern_info *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_legacy_agp_info); + +int drm_legacy_agp_info_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_info *info = data; + int err; + + err = drm_legacy_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_legacy_agp_acquire(struct drm_device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev->dev); + + if (!dev->agp) + return -ENODEV; + if (dev->agp->acquired) + return -EBUSY; + dev->agp->bridge = agp_backend_acquire(pdev); + if (!dev->agp->bridge) + return -ENODEV; + dev->agp->acquired = 1; + return 0; +} +EXPORT_SYMBOL(drm_legacy_agp_acquire); + +/* + * Acquire the AGP device (ioctl). + * + * \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_legacy_agp_acquire_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + return drm_legacy_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_legacy_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_legacy_agp_release); + +int drm_legacy_agp_release_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + return drm_legacy_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_legacy_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_legacy_agp_enable); + +int drm_legacy_agp_enable_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_mode *mode = data; + + return drm_legacy_agp_enable(dev, *mode); +} + +/* + * Allocate AGP memory. + * + * \return zero on success or a negative number on failure. + * + * Verifies the AGP device is present and has been acquired, allocates the + * memory via agp_allocate_memory() and creates a drm_agp_mem entry for it. + */ +int drm_legacy_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) +{ + struct drm_agp_mem *entry; + struct agp_memory *memory; + unsigned long pages; + u32 type; + + if (!dev->agp || !dev->agp->acquired) + return -EINVAL; + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return -ENOMEM; + + pages = DIV_ROUND_UP(request->size, PAGE_SIZE); + type = (u32) request->type; + memory = agp_allocate_memory(dev->agp->bridge, pages, type); + if (!memory) { + kfree(entry); + 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_legacy_agp_alloc); + + +int drm_legacy_agp_alloc_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_buffer *request = data; + + return drm_legacy_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_legacy_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). + * + * \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_legacy_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; + entry = drm_legacy_agp_lookup_entry(dev, request->handle); + if (!entry || !entry->bound) + return -EINVAL; + ret = agp_unbind_memory(entry->memory); + if (ret == 0) + entry->bound = 0; + return ret; +} +EXPORT_SYMBOL(drm_legacy_agp_unbind); + + +int drm_legacy_agp_unbind_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_binding *request = data; + + return drm_legacy_agp_unbind(dev, request); +} + +/* + * Bind AGP memory into the GATT (ioctl) + * + * \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_legacy_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; + entry = drm_legacy_agp_lookup_entry(dev, request->handle); + if (!entry || entry->bound) + return -EINVAL; + page = DIV_ROUND_UP(request->offset, PAGE_SIZE); + retcode = agp_bind_memory(entry->memory, page); + if (retcode) + 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_legacy_agp_bind); + + +int drm_legacy_agp_bind_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_binding *request = data; + + return drm_legacy_agp_bind(dev, request); +} + +/* + * Free AGP memory (ioctl). + * + * \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 is 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_legacy_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) +{ + struct drm_agp_mem *entry; + + if (!dev->agp || !dev->agp->acquired) + return -EINVAL; + entry = drm_legacy_agp_lookup_entry(dev, request->handle); + if (!entry) + return -EINVAL; + if (entry->bound) + agp_unbind_memory(entry->memory); + + list_del(&entry->head); + + agp_free_memory(entry->memory); + kfree(entry); + return 0; +} +EXPORT_SYMBOL(drm_legacy_agp_free); + + +int drm_legacy_agp_free_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_agp_buffer *request = data; + + return drm_legacy_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. + * + * Note that final cleanup of the kmalloced structure is directly done in + * drm_pci_agp_destroy. + */ +struct drm_agp_head *drm_legacy_agp_init(struct drm_device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev->dev); + struct drm_agp_head *head = NULL; + + head = kzalloc(sizeof(*head), GFP_KERNEL); + if (!head) + return NULL; + head->bridge = agp_find_bridge(pdev); + if (!head->bridge) { + head->bridge = agp_backend_acquire(pdev); + if (!head->bridge) { + kfree(head); + 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) { + kfree(head); + 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; +} +/* Only exported for i810.ko */ +EXPORT_SYMBOL(drm_legacy_agp_init); + +/** + * drm_legacy_agp_clear - Clear AGP resource list + * @dev: DRM device + * + * Iterate over all AGP resources and remove them. But keep the AGP head + * intact so it can still be used. It is safe to call this if AGP is disabled or + * was already removed. + * + * Cleanup is only done for drivers who have DRIVER_LEGACY set. + */ +void drm_legacy_agp_clear(struct drm_device *dev) +{ + struct drm_agp_mem *entry, *tempe; + + if (!dev->agp) + return; + if (!drm_core_check_feature(dev, DRIVER_LEGACY)) + return; + + list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { + if (entry->bound) + agp_unbind_memory(entry->memory); + agp_free_memory(entry->memory); + kfree(entry); + } + INIT_LIST_HEAD(&dev->agp->memory); + + if (dev->agp->acquired) + drm_legacy_agp_release(dev); + + dev->agp->acquired = 0; + dev->agp->enabled = 0; +} + +#endif -- cgit v1.2.3