drm_vblank_work.o \
drm_vma_manager.o \
drm_writeback.o
-drm-$(CONFIG_DRM_LEGACY) += \
- drm_agpsupport.o \
- drm_bufs.o \
- drm_context.o \
- drm_dma.o \
- drm_hashtab.o \
- drm_irq.o \
- drm_legacy_misc.o \
- drm_lock.o \
- drm_memory.o \
- drm_scatter.o \
- drm_vm.o
drm-$(CONFIG_DRM_LIB_RANDOM) += lib/drm_random.o
drm-$(CONFIG_COMPAT) += drm_ioc32.o
drm-$(CONFIG_DRM_PANEL) += drm_panel.o
+++ /dev/null
-/*
- * \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 <linux/module.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-
-#if IS_ENABLED(CONFIG_AGP)
-#include <asm/agp.h>
-#endif
-
-#include <drm/drm_device.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-#include <drm/drm_print.h>
-
-#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
+++ /dev/null
-/*
- * Legacy: Generic DRM Buffer Management
- *
- * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * All Rights Reserved.
- *
- * Author: Rickard E. (Rik) Faith <faith@valinux.com>
- * Author: Gareth Hughes <gareth@valinux.com>
- *
- * 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 <linux/export.h>
-#include <linux/log2.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/nospec.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/vmalloc.h>
-
-#include <asm/shmparam.h>
-
-#include <drm/drm_device.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-#include <drm/drm_print.h>
-
-#include "drm_legacy.h"
-
-
-static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
- struct drm_local_map *map)
-{
- struct drm_map_list *entry;
-
- list_for_each_entry(entry, &dev->maplist, head) {
- /*
- * Because the kernel-userspace ABI is fixed at a 32-bit offset
- * while PCI resources may live above that, we only compare the
- * lower 32 bits of the map offset for maps of type
- * _DRM_FRAMEBUFFER or _DRM_REGISTERS.
- * It is assumed that if a driver have more than one resource
- * of each type, the lower 32 bits are different.
- */
- if (!entry->map ||
- map->type != entry->map->type ||
- entry->master != dev->master)
- continue;
- switch (map->type) {
- case _DRM_SHM:
- if (map->flags != _DRM_CONTAINS_LOCK)
- break;
- return entry;
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- if ((entry->map->offset & 0xffffffff) ==
- (map->offset & 0xffffffff))
- return entry;
- break;
- default: /* Make gcc happy */
- break;
- }
- if (entry->map->offset == map->offset)
- return entry;
- }
-
- return NULL;
-}
-
-static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash,
- unsigned long user_token, int hashed_handle, int shm)
-{
- int use_hashed_handle, shift;
- unsigned long add;
-
-#if (BITS_PER_LONG == 64)
- use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle);
-#elif (BITS_PER_LONG == 32)
- use_hashed_handle = hashed_handle;
-#else
-#error Unsupported long size. Neither 64 nor 32 bits.
-#endif
-
- if (!use_hashed_handle) {
- int ret;
-
- hash->key = user_token >> PAGE_SHIFT;
- ret = drm_ht_insert_item(&dev->map_hash, hash);
- if (ret != -EINVAL)
- return ret;
- }
-
- shift = 0;
- add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT;
- if (shm && (SHMLBA > PAGE_SIZE)) {
- int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1;
-
- /* For shared memory, we have to preserve the SHMLBA
- * bits of the eventual vma->vm_pgoff value during
- * mmap(). Otherwise we run into cache aliasing problems
- * on some platforms. On these platforms, the pgoff of
- * a mmap() request is used to pick a suitable virtual
- * address for the mmap() region such that it will not
- * cause cache aliasing problems.
- *
- * Therefore, make sure the SHMLBA relevant bits of the
- * hash value we use are equal to those in the original
- * kernel virtual address.
- */
- shift = bits;
- add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL));
- }
-
- return drm_ht_just_insert_please(&dev->map_hash, hash,
- user_token, 32 - PAGE_SHIFT - 3,
- shift, add);
-}
-
-/*
- * Core function to create a range of memory available for mapping by a
- * non-root process.
- *
- * Adjusts the memory offset to its absolute value according to the mapping
- * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
- * applicable and if supported by the kernel.
- */
-static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
- unsigned int size, enum drm_map_type type,
- enum drm_map_flags flags,
- struct drm_map_list **maplist)
-{
- struct drm_local_map *map;
- struct drm_map_list *list;
- unsigned long user_token;
- int ret;
-
- map = kmalloc(sizeof(*map), GFP_KERNEL);
- if (!map)
- return -ENOMEM;
-
- map->offset = offset;
- map->size = size;
- map->flags = flags;
- map->type = type;
-
- /* Only allow shared memory to be removable since we only keep enough
- * book keeping information about shared memory to allow for removal
- * when processes fork.
- */
- if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) {
- kfree(map);
- return -EINVAL;
- }
- DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n",
- (unsigned long long)map->offset, map->size, map->type);
-
- /* page-align _DRM_SHM maps. They are allocated here so there is no security
- * hole created by that and it works around various broken drivers that use
- * a non-aligned quantity to map the SAREA. --BenH
- */
- if (map->type == _DRM_SHM)
- map->size = PAGE_ALIGN(map->size);
-
- if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
- kfree(map);
- return -EINVAL;
- }
- map->mtrr = -1;
- map->handle = NULL;
-
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
-#if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__)
- if (map->offset + (map->size-1) < map->offset ||
- map->offset < virt_to_phys(high_memory)) {
- kfree(map);
- return -EINVAL;
- }
-#endif
- /* Some drivers preinitialize some maps, without the X Server
- * needing to be aware of it. Therefore, we just return success
- * when the server tries to create a duplicate map.
- */
- list = drm_find_matching_map(dev, map);
- if (list != NULL) {
- if (list->map->size != map->size) {
- DRM_DEBUG("Matching maps of type %d with "
- "mismatched sizes, (%ld vs %ld)\n",
- map->type, map->size,
- list->map->size);
- list->map->size = map->size;
- }
-
- kfree(map);
- *maplist = list;
- return 0;
- }
-
- if (map->type == _DRM_FRAME_BUFFER ||
- (map->flags & _DRM_WRITE_COMBINING)) {
- map->mtrr =
- arch_phys_wc_add(map->offset, map->size);
- }
- if (map->type == _DRM_REGISTERS) {
- if (map->flags & _DRM_WRITE_COMBINING)
- map->handle = ioremap_wc(map->offset,
- map->size);
- else
- map->handle = ioremap(map->offset, map->size);
- if (!map->handle) {
- kfree(map);
- return -ENOMEM;
- }
- }
-
- break;
- case _DRM_SHM:
- list = drm_find_matching_map(dev, map);
- if (list != NULL) {
- if (list->map->size != map->size) {
- DRM_DEBUG("Matching maps of type %d with "
- "mismatched sizes, (%ld vs %ld)\n",
- map->type, map->size, list->map->size);
- list->map->size = map->size;
- }
-
- kfree(map);
- *maplist = list;
- return 0;
- }
- map->handle = vmalloc_user(map->size);
- DRM_DEBUG("%lu %d %p\n",
- map->size, order_base_2(map->size), map->handle);
- if (!map->handle) {
- kfree(map);
- return -ENOMEM;
- }
- map->offset = (unsigned long)map->handle;
- if (map->flags & _DRM_CONTAINS_LOCK) {
- /* Prevent a 2nd X Server from creating a 2nd lock */
- if (dev->master->lock.hw_lock != NULL) {
- vfree(map->handle);
- kfree(map);
- return -EBUSY;
- }
- dev->sigdata.lock = dev->master->lock.hw_lock = map->handle; /* Pointer to lock */
- }
- break;
- case _DRM_AGP: {
- struct drm_agp_mem *entry;
- int valid = 0;
-
- if (!dev->agp) {
- kfree(map);
- return -EINVAL;
- }
-#ifdef __alpha__
- map->offset += dev->hose->mem_space->start;
-#endif
- /* In some cases (i810 driver), user space may have already
- * added the AGP base itself, because dev->agp->base previously
- * only got set during AGP enable. So, only add the base
- * address if the map's offset isn't already within the
- * aperture.
- */
- if (map->offset < dev->agp->base ||
- map->offset > dev->agp->base +
- dev->agp->agp_info.aper_size * 1024 * 1024 - 1) {
- map->offset += dev->agp->base;
- }
- map->mtrr = dev->agp->agp_mtrr; /* for getmap */
-
- /* This assumes the DRM is in total control of AGP space.
- * It's not always the case as AGP can be in the control
- * of user space (i.e. i810 driver). So this loop will get
- * skipped and we double check that dev->agp->memory is
- * actually set as well as being invalid before EPERM'ing
- */
- list_for_each_entry(entry, &dev->agp->memory, head) {
- if ((map->offset >= entry->bound) &&
- (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) {
- valid = 1;
- break;
- }
- }
- if (!list_empty(&dev->agp->memory) && !valid) {
- kfree(map);
- return -EPERM;
- }
- DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n",
- (unsigned long long)map->offset, map->size);
-
- break;
- }
- case _DRM_SCATTER_GATHER:
- if (!dev->sg) {
- kfree(map);
- return -EINVAL;
- }
- map->offset += (unsigned long)dev->sg->virtual;
- break;
- case _DRM_CONSISTENT:
- /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
- * As we're limiting the address to 2^32-1 (or less),
- * casting it down to 32 bits is no problem, but we
- * need to point to a 64bit variable first.
- */
- map->handle = dma_alloc_coherent(dev->dev,
- map->size,
- &map->offset,
- GFP_KERNEL);
- if (!map->handle) {
- kfree(map);
- return -ENOMEM;
- }
- break;
- default:
- kfree(map);
- return -EINVAL;
- }
-
- list = kzalloc(sizeof(*list), GFP_KERNEL);
- if (!list) {
- if (map->type == _DRM_REGISTERS)
- iounmap(map->handle);
- kfree(map);
- return -EINVAL;
- }
- list->map = map;
-
- mutex_lock(&dev->struct_mutex);
- list_add(&list->head, &dev->maplist);
-
- /* Assign a 32-bit handle */
- /* We do it here so that dev->struct_mutex protects the increment */
- user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle :
- map->offset;
- ret = drm_map_handle(dev, &list->hash, user_token, 0,
- (map->type == _DRM_SHM));
- if (ret) {
- if (map->type == _DRM_REGISTERS)
- iounmap(map->handle);
- kfree(map);
- kfree(list);
- mutex_unlock(&dev->struct_mutex);
- return ret;
- }
-
- list->user_token = list->hash.key << PAGE_SHIFT;
- mutex_unlock(&dev->struct_mutex);
-
- if (!(map->flags & _DRM_DRIVER))
- list->master = dev->master;
- *maplist = list;
- return 0;
-}
-
-int drm_legacy_addmap(struct drm_device *dev, resource_size_t offset,
- unsigned int size, enum drm_map_type type,
- enum drm_map_flags flags, struct drm_local_map **map_ptr)
-{
- struct drm_map_list *list;
- int rc;
-
- rc = drm_addmap_core(dev, offset, size, type, flags, &list);
- if (!rc)
- *map_ptr = list->map;
- return rc;
-}
-EXPORT_SYMBOL(drm_legacy_addmap);
-
-struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
- unsigned int token)
-{
- struct drm_map_list *_entry;
-
- list_for_each_entry(_entry, &dev->maplist, head)
- if (_entry->user_token == token)
- return _entry->map;
- return NULL;
-}
-EXPORT_SYMBOL(drm_legacy_findmap);
-
-/*
- * Ioctl to specify a range of memory that is available for mapping by a
- * non-root process.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_map structure.
- * \return zero on success or a negative value on error.
- *
- */
-int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_map *map = data;
- struct drm_map_list *maplist;
- int err;
-
- if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM))
- return -EPERM;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- err = drm_addmap_core(dev, map->offset, map->size, map->type,
- map->flags, &maplist);
-
- if (err)
- return err;
-
- /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
- map->handle = (void *)(unsigned long)maplist->user_token;
-
- /*
- * It appears that there are no users of this value whatsoever --
- * drmAddMap just discards it. Let's not encourage its use.
- * (Keeping drm_addmap_core's returned mtrr value would be wrong --
- * it's not a real mtrr index anymore.)
- */
- map->mtrr = -1;
-
- return 0;
-}
-
-/*
- * Get a mapping information.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_map structure.
- *
- * \return zero on success or a negative number on failure.
- *
- * Searches for the mapping with the specified offset and copies its information
- * into userspace
- */
-int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_map *map = data;
- struct drm_map_list *r_list = NULL;
- struct list_head *list;
- int idx;
- int i;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- idx = map->offset;
- if (idx < 0)
- return -EINVAL;
-
- i = 0;
- mutex_lock(&dev->struct_mutex);
- list_for_each(list, &dev->maplist) {
- if (i == idx) {
- r_list = list_entry(list, struct drm_map_list, head);
- break;
- }
- i++;
- }
- if (!r_list || !r_list->map) {
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
- }
-
- map->offset = r_list->map->offset;
- map->size = r_list->map->size;
- map->type = r_list->map->type;
- map->flags = r_list->map->flags;
- map->handle = (void *)(unsigned long) r_list->user_token;
- map->mtrr = arch_phys_wc_index(r_list->map->mtrr);
-
- mutex_unlock(&dev->struct_mutex);
-
- return 0;
-}
-
-/*
- * Remove a map private from list and deallocate resources if the mapping
- * isn't in use.
- *
- * Searches the map on drm_device::maplist, removes it from the list, see if
- * it's being used, and free any associated resource (such as MTRR's) if it's not
- * being on use.
- *
- * \sa drm_legacy_addmap
- */
-int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
-{
- struct drm_map_list *r_list = NULL, *list_t;
- int found = 0;
- struct drm_master *master;
-
- /* Find the list entry for the map and remove it */
- list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
- if (r_list->map == map) {
- master = r_list->master;
- list_del(&r_list->head);
- drm_ht_remove_key(&dev->map_hash,
- r_list->user_token >> PAGE_SHIFT);
- kfree(r_list);
- found = 1;
- break;
- }
- }
-
- if (!found)
- return -EINVAL;
-
- switch (map->type) {
- case _DRM_REGISTERS:
- iounmap(map->handle);
- fallthrough;
- case _DRM_FRAME_BUFFER:
- arch_phys_wc_del(map->mtrr);
- break;
- case _DRM_SHM:
- vfree(map->handle);
- if (master) {
- if (dev->sigdata.lock == master->lock.hw_lock)
- dev->sigdata.lock = NULL;
- master->lock.hw_lock = NULL; /* SHM removed */
- master->lock.file_priv = NULL;
- wake_up_interruptible_all(&master->lock.lock_queue);
- }
- break;
- case _DRM_AGP:
- case _DRM_SCATTER_GATHER:
- break;
- case _DRM_CONSISTENT:
- dma_free_coherent(dev->dev,
- map->size,
- map->handle,
- map->offset);
- break;
- }
- kfree(map);
-
- return 0;
-}
-EXPORT_SYMBOL(drm_legacy_rmmap_locked);
-
-void drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map)
-{
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- mutex_lock(&dev->struct_mutex);
- drm_legacy_rmmap_locked(dev, map);
- mutex_unlock(&dev->struct_mutex);
-}
-EXPORT_SYMBOL(drm_legacy_rmmap);
-
-void drm_legacy_master_rmmaps(struct drm_device *dev, struct drm_master *master)
-{
- struct drm_map_list *r_list, *list_temp;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- mutex_lock(&dev->struct_mutex);
- list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
- if (r_list->master == master) {
- drm_legacy_rmmap_locked(dev, r_list->map);
- r_list = NULL;
- }
- }
- mutex_unlock(&dev->struct_mutex);
-}
-
-void drm_legacy_rmmaps(struct drm_device *dev)
-{
- struct drm_map_list *r_list, *list_temp;
-
- list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
- drm_legacy_rmmap(dev, r_list->map);
-}
-
-/* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
- * the last close of the device, and this is necessary for cleanup when things
- * exit uncleanly. Therefore, having userland manually remove mappings seems
- * like a pointless exercise since they're going away anyway.
- *
- * One use case might be after addmap is allowed for normal users for SHM and
- * gets used by drivers that the server doesn't need to care about. This seems
- * unlikely.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a struct drm_map structure.
- * \return zero on success or a negative value on error.
- */
-int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_map *request = data;
- struct drm_local_map *map = NULL;
- struct drm_map_list *r_list;
- int ret;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- mutex_lock(&dev->struct_mutex);
- list_for_each_entry(r_list, &dev->maplist, head) {
- if (r_list->map &&
- r_list->user_token == (unsigned long)request->handle &&
- r_list->map->flags & _DRM_REMOVABLE) {
- map = r_list->map;
- break;
- }
- }
-
- /* List has wrapped around to the head pointer, or it's empty we didn't
- * find anything.
- */
- if (list_empty(&dev->maplist) || !map) {
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
- }
-
- /* Register and framebuffer maps are permanent */
- if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
- mutex_unlock(&dev->struct_mutex);
- return 0;
- }
-
- ret = drm_legacy_rmmap_locked(dev, map);
-
- mutex_unlock(&dev->struct_mutex);
-
- return ret;
-}
-
-/*
- * Cleanup after an error on one of the addbufs() functions.
- *
- * \param dev DRM device.
- * \param entry buffer entry where the error occurred.
- *
- * Frees any pages and buffers associated with the given entry.
- */
-static void drm_cleanup_buf_error(struct drm_device *dev,
- struct drm_buf_entry *entry)
-{
- drm_dma_handle_t *dmah;
- int i;
-
- if (entry->seg_count) {
- for (i = 0; i < entry->seg_count; i++) {
- if (entry->seglist[i]) {
- dmah = entry->seglist[i];
- dma_free_coherent(dev->dev,
- dmah->size,
- dmah->vaddr,
- dmah->busaddr);
- kfree(dmah);
- }
- }
- kfree(entry->seglist);
-
- entry->seg_count = 0;
- }
-
- if (entry->buf_count) {
- for (i = 0; i < entry->buf_count; i++) {
- kfree(entry->buflist[i].dev_private);
- }
- kfree(entry->buflist);
-
- entry->buf_count = 0;
- }
-}
-
-#if IS_ENABLED(CONFIG_AGP)
-/*
- * Add AGP buffers for DMA transfers.
- *
- * \param dev struct drm_device to which the buffers are to be added.
- * \param request pointer to a struct drm_buf_desc describing the request.
- * \return zero on success or a negative number on failure.
- *
- * After some sanity checks creates a drm_buf structure for each buffer and
- * reallocates the buffer list of the same size order to accommodate the new
- * buffers.
- */
-int drm_legacy_addbufs_agp(struct drm_device *dev,
- struct drm_buf_desc *request)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_entry *entry;
- struct drm_agp_mem *agp_entry;
- struct drm_buf *buf;
- unsigned long offset;
- unsigned long agp_offset;
- int count;
- int order;
- int size;
- int alignment;
- int page_order;
- int total;
- int byte_count;
- int i, valid;
- struct drm_buf **temp_buflist;
-
- if (!dma)
- return -EINVAL;
-
- count = request->count;
- order = order_base_2(request->size);
- size = 1 << order;
-
- alignment = (request->flags & _DRM_PAGE_ALIGN)
- ? PAGE_ALIGN(size) : size;
- page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
- total = PAGE_SIZE << page_order;
-
- byte_count = 0;
- agp_offset = dev->agp->base + request->agp_start;
-
- DRM_DEBUG("count: %d\n", count);
- DRM_DEBUG("order: %d\n", order);
- DRM_DEBUG("size: %d\n", size);
- DRM_DEBUG("agp_offset: %lx\n", agp_offset);
- DRM_DEBUG("alignment: %d\n", alignment);
- DRM_DEBUG("page_order: %d\n", page_order);
- DRM_DEBUG("total: %d\n", total);
-
- if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
- return -EINVAL;
-
- /* Make sure buffers are located in AGP memory that we own */
- valid = 0;
- list_for_each_entry(agp_entry, &dev->agp->memory, head) {
- if ((agp_offset >= agp_entry->bound) &&
- (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) {
- valid = 1;
- break;
- }
- }
- if (!list_empty(&dev->agp->memory) && !valid) {
- DRM_DEBUG("zone invalid\n");
- return -EINVAL;
- }
- spin_lock(&dev->buf_lock);
- if (dev->buf_use) {
- spin_unlock(&dev->buf_lock);
- return -EBUSY;
- }
- atomic_inc(&dev->buf_alloc);
- spin_unlock(&dev->buf_lock);
-
- mutex_lock(&dev->struct_mutex);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- if (count < 0 || count > 4096) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -EINVAL;
- }
-
- entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
- if (!entry->buflist) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- entry->buf_size = size;
- entry->page_order = page_order;
-
- offset = 0;
-
- while (entry->buf_count < count) {
- buf = &entry->buflist[entry->buf_count];
- buf->idx = dma->buf_count + entry->buf_count;
- buf->total = alignment;
- buf->order = order;
- buf->used = 0;
-
- buf->offset = (dma->byte_count + offset);
- buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- buf->file_priv = NULL;
-
- buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
- if (!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
-
- offset += alignment;
- entry->buf_count++;
- byte_count += PAGE_SIZE << page_order;
- }
-
- DRM_DEBUG("byte_count: %d\n", byte_count);
-
- temp_buflist = krealloc(dma->buflist,
- (dma->buf_count + entry->buf_count) *
- sizeof(*dma->buflist), GFP_KERNEL);
- if (!temp_buflist) {
- /* Free the entry because it isn't valid */
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- dma->buflist = temp_buflist;
-
- for (i = 0; i < entry->buf_count; i++) {
- dma->buflist[i + dma->buf_count] = &entry->buflist[i];
- }
-
- dma->buf_count += entry->buf_count;
- dma->seg_count += entry->seg_count;
- dma->page_count += byte_count >> PAGE_SHIFT;
- dma->byte_count += byte_count;
-
- DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
- DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
-
- mutex_unlock(&dev->struct_mutex);
-
- request->count = entry->buf_count;
- request->size = size;
-
- dma->flags = _DRM_DMA_USE_AGP;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-}
-EXPORT_SYMBOL(drm_legacy_addbufs_agp);
-#endif /* CONFIG_AGP */
-
-int drm_legacy_addbufs_pci(struct drm_device *dev,
- struct drm_buf_desc *request)
-{
- struct drm_device_dma *dma = dev->dma;
- int count;
- int order;
- int size;
- int total;
- int page_order;
- struct drm_buf_entry *entry;
- drm_dma_handle_t *dmah;
- struct drm_buf *buf;
- int alignment;
- unsigned long offset;
- int i;
- int byte_count;
- int page_count;
- unsigned long *temp_pagelist;
- struct drm_buf **temp_buflist;
-
- if (!drm_core_check_feature(dev, DRIVER_PCI_DMA))
- return -EOPNOTSUPP;
-
- if (!dma)
- return -EINVAL;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- count = request->count;
- order = order_base_2(request->size);
- size = 1 << order;
-
- DRM_DEBUG("count=%d, size=%d (%d), order=%d\n",
- request->count, request->size, size, order);
-
- if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
- return -EINVAL;
-
- alignment = (request->flags & _DRM_PAGE_ALIGN)
- ? PAGE_ALIGN(size) : size;
- page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
- total = PAGE_SIZE << page_order;
-
- spin_lock(&dev->buf_lock);
- if (dev->buf_use) {
- spin_unlock(&dev->buf_lock);
- return -EBUSY;
- }
- atomic_inc(&dev->buf_alloc);
- spin_unlock(&dev->buf_lock);
-
- mutex_lock(&dev->struct_mutex);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- if (count < 0 || count > 4096) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -EINVAL;
- }
-
- entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
- if (!entry->buflist) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- entry->seglist = kcalloc(count, sizeof(*entry->seglist), GFP_KERNEL);
- if (!entry->seglist) {
- kfree(entry->buflist);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- /* Keep the original pagelist until we know all the allocations
- * have succeeded
- */
- temp_pagelist = kmalloc_array(dma->page_count + (count << page_order),
- sizeof(*dma->pagelist),
- GFP_KERNEL);
- if (!temp_pagelist) {
- kfree(entry->buflist);
- kfree(entry->seglist);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- memcpy(temp_pagelist,
- dma->pagelist, dma->page_count * sizeof(*dma->pagelist));
- DRM_DEBUG("pagelist: %d entries\n",
- dma->page_count + (count << page_order));
-
- entry->buf_size = size;
- entry->page_order = page_order;
- byte_count = 0;
- page_count = 0;
-
- while (entry->buf_count < count) {
- dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
- if (!dmah) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- entry->seg_count = count;
- drm_cleanup_buf_error(dev, entry);
- kfree(temp_pagelist);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- dmah->size = total;
- dmah->vaddr = dma_alloc_coherent(dev->dev,
- dmah->size,
- &dmah->busaddr,
- GFP_KERNEL);
- if (!dmah->vaddr) {
- kfree(dmah);
-
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- entry->seg_count = count;
- drm_cleanup_buf_error(dev, entry);
- kfree(temp_pagelist);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- entry->seglist[entry->seg_count++] = dmah;
- for (i = 0; i < (1 << page_order); i++) {
- DRM_DEBUG("page %d @ 0x%08lx\n",
- dma->page_count + page_count,
- (unsigned long)dmah->vaddr + PAGE_SIZE * i);
- temp_pagelist[dma->page_count + page_count++]
- = (unsigned long)dmah->vaddr + PAGE_SIZE * i;
- }
- for (offset = 0;
- offset + size <= total && entry->buf_count < count;
- offset += alignment, ++entry->buf_count) {
- buf = &entry->buflist[entry->buf_count];
- buf->idx = dma->buf_count + entry->buf_count;
- buf->total = alignment;
- buf->order = order;
- buf->used = 0;
- buf->offset = (dma->byte_count + byte_count + offset);
- buf->address = (void *)(dmah->vaddr + offset);
- buf->bus_address = dmah->busaddr + offset;
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- buf->file_priv = NULL;
-
- buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = kzalloc(buf->dev_priv_size,
- GFP_KERNEL);
- if (!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- entry->seg_count = count;
- drm_cleanup_buf_error(dev, entry);
- kfree(temp_pagelist);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- DRM_DEBUG("buffer %d @ %p\n",
- entry->buf_count, buf->address);
- }
- byte_count += PAGE_SIZE << page_order;
- }
-
- temp_buflist = krealloc(dma->buflist,
- (dma->buf_count + entry->buf_count) *
- sizeof(*dma->buflist), GFP_KERNEL);
- if (!temp_buflist) {
- /* Free the entry because it isn't valid */
- drm_cleanup_buf_error(dev, entry);
- kfree(temp_pagelist);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- dma->buflist = temp_buflist;
-
- for (i = 0; i < entry->buf_count; i++) {
- dma->buflist[i + dma->buf_count] = &entry->buflist[i];
- }
-
- /* No allocations failed, so now we can replace the original pagelist
- * with the new one.
- */
- if (dma->page_count) {
- kfree(dma->pagelist);
- }
- dma->pagelist = temp_pagelist;
-
- dma->buf_count += entry->buf_count;
- dma->seg_count += entry->seg_count;
- dma->page_count += entry->seg_count << page_order;
- dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
-
- mutex_unlock(&dev->struct_mutex);
-
- request->count = entry->buf_count;
- request->size = size;
-
- if (request->flags & _DRM_PCI_BUFFER_RO)
- dma->flags = _DRM_DMA_USE_PCI_RO;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-
-}
-EXPORT_SYMBOL(drm_legacy_addbufs_pci);
-
-static int drm_legacy_addbufs_sg(struct drm_device *dev,
- struct drm_buf_desc *request)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_entry *entry;
- struct drm_buf *buf;
- unsigned long offset;
- unsigned long agp_offset;
- int count;
- int order;
- int size;
- int alignment;
- int page_order;
- int total;
- int byte_count;
- int i;
- struct drm_buf **temp_buflist;
-
- if (!drm_core_check_feature(dev, DRIVER_SG))
- return -EOPNOTSUPP;
-
- if (!dma)
- return -EINVAL;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- count = request->count;
- order = order_base_2(request->size);
- size = 1 << order;
-
- alignment = (request->flags & _DRM_PAGE_ALIGN)
- ? PAGE_ALIGN(size) : size;
- page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
- total = PAGE_SIZE << page_order;
-
- byte_count = 0;
- agp_offset = request->agp_start;
-
- DRM_DEBUG("count: %d\n", count);
- DRM_DEBUG("order: %d\n", order);
- DRM_DEBUG("size: %d\n", size);
- DRM_DEBUG("agp_offset: %lu\n", agp_offset);
- DRM_DEBUG("alignment: %d\n", alignment);
- DRM_DEBUG("page_order: %d\n", page_order);
- DRM_DEBUG("total: %d\n", total);
-
- if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
- return -EINVAL;
-
- spin_lock(&dev->buf_lock);
- if (dev->buf_use) {
- spin_unlock(&dev->buf_lock);
- return -EBUSY;
- }
- atomic_inc(&dev->buf_alloc);
- spin_unlock(&dev->buf_lock);
-
- mutex_lock(&dev->struct_mutex);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- if (count < 0 || count > 4096) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -EINVAL;
- }
-
- entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
- if (!entry->buflist) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- entry->buf_size = size;
- entry->page_order = page_order;
-
- offset = 0;
-
- while (entry->buf_count < count) {
- buf = &entry->buflist[entry->buf_count];
- buf->idx = dma->buf_count + entry->buf_count;
- buf->total = alignment;
- buf->order = order;
- buf->used = 0;
-
- buf->offset = (dma->byte_count + offset);
- buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset
- + (unsigned long)dev->sg->virtual);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- buf->file_priv = NULL;
-
- buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
- if (!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
-
- offset += alignment;
- entry->buf_count++;
- byte_count += PAGE_SIZE << page_order;
- }
-
- DRM_DEBUG("byte_count: %d\n", byte_count);
-
- temp_buflist = krealloc(dma->buflist,
- (dma->buf_count + entry->buf_count) *
- sizeof(*dma->buflist), GFP_KERNEL);
- if (!temp_buflist) {
- /* Free the entry because it isn't valid */
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- dma->buflist = temp_buflist;
-
- for (i = 0; i < entry->buf_count; i++) {
- dma->buflist[i + dma->buf_count] = &entry->buflist[i];
- }
-
- dma->buf_count += entry->buf_count;
- dma->seg_count += entry->seg_count;
- dma->page_count += byte_count >> PAGE_SHIFT;
- dma->byte_count += byte_count;
-
- DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
- DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
-
- mutex_unlock(&dev->struct_mutex);
-
- request->count = entry->buf_count;
- request->size = size;
-
- dma->flags = _DRM_DMA_USE_SG;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-}
-
-/*
- * Add buffers for DMA transfers (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a struct drm_buf_desc request.
- * \return zero on success or a negative number on failure.
- *
- * According with the memory type specified in drm_buf_desc::flags and the
- * build options, it dispatches the call either to addbufs_agp(),
- * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent
- * PCI memory respectively.
- */
-int drm_legacy_addbufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_buf_desc *request = data;
- int ret;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EOPNOTSUPP;
-
-#if IS_ENABLED(CONFIG_AGP)
- if (request->flags & _DRM_AGP_BUFFER)
- ret = drm_legacy_addbufs_agp(dev, request);
- else
-#endif
- if (request->flags & _DRM_SG_BUFFER)
- ret = drm_legacy_addbufs_sg(dev, request);
- else if (request->flags & _DRM_FB_BUFFER)
- ret = -EINVAL;
- else
- ret = drm_legacy_addbufs_pci(dev, request);
-
- return ret;
-}
-
-/*
- * Get information about the buffer mappings.
- *
- * This was originally mean for debugging purposes, or by a sophisticated
- * client library to determine how best to use the available buffers (e.g.,
- * large buffers can be used for image transfer).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_info structure.
- * \return zero on success or a negative number on failure.
- *
- * Increments drm_device::buf_use while holding the drm_device::buf_lock
- * lock, preventing of allocating more buffers after this call. Information
- * about each requested buffer is then copied into user space.
- */
-int __drm_legacy_infobufs(struct drm_device *dev,
- void *data, int *p,
- int (*f)(void *, int, struct drm_buf_entry *))
-{
- struct drm_device_dma *dma = dev->dma;
- int i;
- int count;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EOPNOTSUPP;
-
- if (!dma)
- return -EINVAL;
-
- spin_lock(&dev->buf_lock);
- if (atomic_read(&dev->buf_alloc)) {
- spin_unlock(&dev->buf_lock);
- return -EBUSY;
- }
- ++dev->buf_use; /* Can't allocate more after this call */
- spin_unlock(&dev->buf_lock);
-
- for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
- if (dma->bufs[i].buf_count)
- ++count;
- }
-
- DRM_DEBUG("count = %d\n", count);
-
- if (*p >= count) {
- for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
- struct drm_buf_entry *from = &dma->bufs[i];
-
- if (from->buf_count) {
- if (f(data, count, from) < 0)
- return -EFAULT;
- DRM_DEBUG("%d %d %d %d %d\n",
- i,
- dma->bufs[i].buf_count,
- dma->bufs[i].buf_size,
- dma->bufs[i].low_mark,
- dma->bufs[i].high_mark);
- ++count;
- }
- }
- }
- *p = count;
-
- return 0;
-}
-
-static int copy_one_buf(void *data, int count, struct drm_buf_entry *from)
-{
- struct drm_buf_info *request = data;
- struct drm_buf_desc __user *to = &request->list[count];
- struct drm_buf_desc v = {.count = from->buf_count,
- .size = from->buf_size,
- .low_mark = from->low_mark,
- .high_mark = from->high_mark};
-
- if (copy_to_user(to, &v, offsetof(struct drm_buf_desc, flags)))
- return -EFAULT;
- return 0;
-}
-
-int drm_legacy_infobufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_buf_info *request = data;
-
- return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf);
-}
-
-/*
- * Specifies a low and high water mark for buffer allocation
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg a pointer to a drm_buf_desc structure.
- * \return zero on success or a negative number on failure.
- *
- * Verifies that the size order is bounded between the admissible orders and
- * updates the respective drm_device_dma::bufs entry low and high water mark.
- *
- * \note This ioctl is deprecated and mostly never used.
- */
-int drm_legacy_markbufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_desc *request = data;
- int order;
- struct drm_buf_entry *entry;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EOPNOTSUPP;
-
- if (!dma)
- return -EINVAL;
-
- DRM_DEBUG("%d, %d, %d\n",
- request->size, request->low_mark, request->high_mark);
- order = order_base_2(request->size);
- if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
- return -EINVAL;
- entry = &dma->bufs[order];
-
- if (request->low_mark < 0 || request->low_mark > entry->buf_count)
- return -EINVAL;
- if (request->high_mark < 0 || request->high_mark > entry->buf_count)
- return -EINVAL;
-
- entry->low_mark = request->low_mark;
- entry->high_mark = request->high_mark;
-
- return 0;
-}
-
-/*
- * Unreserve the buffers in list, previously reserved using drmDMA.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_free structure.
- * \return zero on success or a negative number on failure.
- *
- * Calls free_buffer() for each used buffer.
- * This function is primarily used for debugging.
- */
-int drm_legacy_freebufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_free *request = data;
- int i;
- int idx;
- struct drm_buf *buf;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EOPNOTSUPP;
-
- if (!dma)
- return -EINVAL;
-
- DRM_DEBUG("%d\n", request->count);
- for (i = 0; i < request->count; i++) {
- if (copy_from_user(&idx, &request->list[i], sizeof(idx)))
- return -EFAULT;
- if (idx < 0 || idx >= dma->buf_count) {
- DRM_ERROR("Index %d (of %d max)\n",
- idx, dma->buf_count - 1);
- return -EINVAL;
- }
- idx = array_index_nospec(idx, dma->buf_count);
- buf = dma->buflist[idx];
- if (buf->file_priv != file_priv) {
- DRM_ERROR("Process %d freeing buffer not owned\n",
- task_pid_nr(current));
- return -EINVAL;
- }
- drm_legacy_free_buffer(dev, buf);
- }
-
- return 0;
-}
-
-/*
- * Maps all of the DMA buffers into client-virtual space (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_map structure.
- * \return zero on success or a negative number on failure.
- *
- * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information
- * about each buffer into user space. For PCI buffers, it calls vm_mmap() with
- * offset equal to 0, which drm_mmap() interprets as PCI buffers and calls
- * drm_mmap_dma().
- */
-int __drm_legacy_mapbufs(struct drm_device *dev, void *data, int *p,
- void __user **v,
- int (*f)(void *, int, unsigned long,
- struct drm_buf *),
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- int retcode = 0;
- unsigned long virtual;
- int i;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EOPNOTSUPP;
-
- if (!dma)
- return -EINVAL;
-
- spin_lock(&dev->buf_lock);
- if (atomic_read(&dev->buf_alloc)) {
- spin_unlock(&dev->buf_lock);
- return -EBUSY;
- }
- dev->buf_use++; /* Can't allocate more after this call */
- spin_unlock(&dev->buf_lock);
-
- if (*p >= dma->buf_count) {
- if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP))
- || (drm_core_check_feature(dev, DRIVER_SG)
- && (dma->flags & _DRM_DMA_USE_SG))) {
- struct drm_local_map *map = dev->agp_buffer_map;
- unsigned long token = dev->agp_buffer_token;
-
- if (!map) {
- retcode = -EINVAL;
- goto done;
- }
- virtual = vm_mmap(file_priv->filp, 0, map->size,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- token);
- } else {
- virtual = vm_mmap(file_priv->filp, 0, dma->byte_count,
- PROT_READ | PROT_WRITE,
- MAP_SHARED, 0);
- }
- if (virtual > -1024UL) {
- /* Real error */
- retcode = (signed long)virtual;
- goto done;
- }
- *v = (void __user *)virtual;
-
- for (i = 0; i < dma->buf_count; i++) {
- if (f(data, i, virtual, dma->buflist[i]) < 0) {
- retcode = -EFAULT;
- goto done;
- }
- }
- }
- done:
- *p = dma->buf_count;
- DRM_DEBUG("%d buffers, retcode = %d\n", *p, retcode);
-
- return retcode;
-}
-
-static int map_one_buf(void *data, int idx, unsigned long virtual,
- struct drm_buf *buf)
-{
- struct drm_buf_map *request = data;
- unsigned long address = virtual + buf->offset; /* *** */
-
- if (copy_to_user(&request->list[idx].idx, &buf->idx,
- sizeof(request->list[0].idx)))
- return -EFAULT;
- if (copy_to_user(&request->list[idx].total, &buf->total,
- sizeof(request->list[0].total)))
- return -EFAULT;
- if (clear_user(&request->list[idx].used, sizeof(int)))
- return -EFAULT;
- if (copy_to_user(&request->list[idx].address, &address,
- sizeof(address)))
- return -EFAULT;
- return 0;
-}
-
-int drm_legacy_mapbufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_buf_map *request = data;
-
- return __drm_legacy_mapbufs(dev, data, &request->count,
- &request->virtual, map_one_buf,
- file_priv);
-}
-
-int drm_legacy_dma_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (dev->driver->dma_ioctl)
- return dev->driver->dma_ioctl(dev, data, file_priv);
- else
- return -EINVAL;
-}
-
-struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev)
-{
- struct drm_map_list *entry;
-
- list_for_each_entry(entry, &dev->maplist, head) {
- if (entry->map && entry->map->type == _DRM_SHM &&
- (entry->map->flags & _DRM_CONTAINS_LOCK)) {
- return entry->map;
- }
- }
- return NULL;
-}
-EXPORT_SYMBOL(drm_legacy_getsarea);
+++ /dev/null
-/*
- * Legacy: Generic DRM Contexts
- *
- * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * All Rights Reserved.
- *
- * Author: Rickard E. (Rik) Faith <faith@valinux.com>
- * Author: Gareth Hughes <gareth@valinux.com>
- *
- * 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 <linux/slab.h>
-#include <linux/uaccess.h>
-
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-#include <drm/drm_print.h>
-
-#include "drm_legacy.h"
-
-struct drm_ctx_list {
- struct list_head head;
- drm_context_t handle;
- struct drm_file *tag;
-};
-
-/******************************************************************/
-/** \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::ctx_idr, while holding the drm_device::struct_mutex
- * lock.
- */
-void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
-{
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- mutex_lock(&dev->struct_mutex);
- idr_remove(&dev->ctx_idr, ctx_handle);
- mutex_unlock(&dev->struct_mutex);
-}
-
-/*
- * Context bitmap allocation.
- *
- * \param dev DRM device.
- * \return (non-negative) context handle on success or a negative number on failure.
- *
- * Allocate a new idr from drm_device::ctx_idr while holding the
- * drm_device::struct_mutex lock.
- */
-static int drm_legacy_ctxbitmap_next(struct drm_device * dev)
-{
- int ret;
-
- mutex_lock(&dev->struct_mutex);
- ret = idr_alloc(&dev->ctx_idr, NULL, DRM_RESERVED_CONTEXTS, 0,
- GFP_KERNEL);
- mutex_unlock(&dev->struct_mutex);
- return ret;
-}
-
-/*
- * Context bitmap initialization.
- *
- * \param dev DRM device.
- *
- * Initialise the drm_device::ctx_idr
- */
-void drm_legacy_ctxbitmap_init(struct drm_device * dev)
-{
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- idr_init(&dev->ctx_idr);
-}
-
-/*
- * Context bitmap cleanup.
- *
- * \param dev DRM device.
- *
- * Free all idr members using drm_ctx_sarea_free helper function
- * while holding the drm_device::struct_mutex lock.
- */
-void drm_legacy_ctxbitmap_cleanup(struct drm_device * dev)
-{
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- mutex_lock(&dev->struct_mutex);
- idr_destroy(&dev->ctx_idr);
- mutex_unlock(&dev->struct_mutex);
-}
-
-/**
- * drm_legacy_ctxbitmap_flush() - Flush all contexts owned by a file
- * @dev: DRM device to operate on
- * @file: Open file to flush contexts for
- *
- * This iterates over all contexts on @dev and drops them if they're owned by
- * @file. Note that after this call returns, new contexts might be added if
- * the file is still alive.
- */
-void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file)
-{
- struct drm_ctx_list *pos, *tmp;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- mutex_lock(&dev->ctxlist_mutex);
-
- list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) {
- if (pos->tag == file &&
- pos->handle != DRM_KERNEL_CONTEXT) {
- if (dev->driver->context_dtor)
- dev->driver->context_dtor(dev, pos->handle);
-
- drm_legacy_ctxbitmap_free(dev, pos->handle);
- list_del(&pos->head);
- kfree(pos);
- }
- }
-
- mutex_unlock(&dev->ctxlist_mutex);
-}
-
-/*@}*/
-
-/******************************************************************/
-/** \name Per Context SAREA Support */
-/*@{*/
-
-/*
- * Get per-context SAREA.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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::ctx_idr with the handle specified and
- * returns its handle.
- */
-int drm_legacy_getsareactx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx_priv_map *request = data;
- struct drm_local_map *map;
- struct drm_map_list *_entry;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- mutex_lock(&dev->struct_mutex);
-
- map = idr_find(&dev->ctx_idr, request->ctx_id);
- if (!map) {
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
- }
-
- request->handle = NULL;
- list_for_each_entry(_entry, &dev->maplist, head) {
- if (_entry->map == map) {
- request->handle =
- (void *)(unsigned long)_entry->user_token;
- break;
- }
- }
-
- mutex_unlock(&dev->struct_mutex);
-
- if (request->handle == NULL)
- return -EINVAL;
-
- return 0;
-}
-
-/*
- * Set per-context SAREA.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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::ctx_idr with it.
- */
-int drm_legacy_setsareactx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx_priv_map *request = data;
- struct drm_local_map *map = NULL;
- struct drm_map_list *r_list = NULL;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- mutex_lock(&dev->struct_mutex);
- list_for_each_entry(r_list, &dev->maplist, head) {
- if (r_list->map
- && r_list->user_token == (unsigned long) request->handle)
- goto found;
- }
- bad:
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
-
- found:
- map = r_list->map;
- if (!map)
- goto bad;
-
- if (IS_ERR(idr_replace(&dev->ctx_idr, map, request->ctx_id)))
- goto bad;
-
- mutex_unlock(&dev->struct_mutex);
-
- 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(struct drm_device * 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.
- */
-static int drm_context_switch_complete(struct drm_device *dev,
- struct drm_file *file_priv, int new)
-{
- dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
-
- if (!_DRM_LOCK_IS_HELD(file_priv->master->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);
-
- return 0;
-}
-
-/*
- * Reserve contexts.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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_legacy_resctx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx_res *res = data;
- struct drm_ctx ctx;
- int i;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- 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;
-
- return 0;
-}
-
-/*
- * Add context.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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_legacy_addctx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx_list *ctx_entry;
- struct drm_ctx *ctx = data;
- int tmp_handle;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- tmp_handle = drm_legacy_ctxbitmap_next(dev);
- if (tmp_handle == DRM_KERNEL_CONTEXT) {
- /* Skip kernel's context and get a new one. */
- tmp_handle = drm_legacy_ctxbitmap_next(dev);
- }
- DRM_DEBUG("%d\n", tmp_handle);
- if (tmp_handle < 0) {
- DRM_DEBUG("Not enough free contexts.\n");
- /* Should this return -EBUSY instead? */
- return tmp_handle;
- }
-
- ctx->handle = tmp_handle;
-
- ctx_entry = kmalloc(sizeof(*ctx_entry), GFP_KERNEL);
- 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 = file_priv;
-
- mutex_lock(&dev->ctxlist_mutex);
- list_add(&ctx_entry->head, &dev->ctxlist);
- mutex_unlock(&dev->ctxlist_mutex);
-
- return 0;
-}
-
-/*
- * Get context.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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_legacy_getctx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx *ctx = data;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- /* This is 0, because we don't handle any context flags */
- ctx->flags = 0;
-
- return 0;
-}
-
-/*
- * Switch context.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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_legacy_switchctx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx *ctx = data;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- DRM_DEBUG("%d\n", ctx->handle);
- return drm_context_switch(dev, dev->last_context, ctx->handle);
-}
-
-/*
- * New context.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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_legacy_newctx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx *ctx = data;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- DRM_DEBUG("%d\n", ctx->handle);
- drm_context_switch_complete(dev, file_priv, ctx->handle);
-
- return 0;
-}
-
-/*
- * Remove context.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \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_legacy_rmctx(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_ctx *ctx = data;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- DRM_DEBUG("%d\n", ctx->handle);
- if (ctx->handle != DRM_KERNEL_CONTEXT) {
- if (dev->driver->context_dtor)
- dev->driver->context_dtor(dev, ctx->handle);
- drm_legacy_ctxbitmap_free(dev, ctx->handle);
- }
-
- mutex_lock(&dev->ctxlist_mutex);
- if (!list_empty(&dev->ctxlist)) {
- struct drm_ctx_list *pos, *n;
-
- list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
- if (pos->handle == ctx->handle) {
- list_del(&pos->head);
- kfree(pos);
- }
- }
- }
- mutex_unlock(&dev->ctxlist_mutex);
-
- return 0;
-}
-
-/*@}*/
+++ /dev/null
-/*
- * \file drm_dma.c
- * DMA IOCTL and function support
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Fri Mar 19 14:30:16 1999 by faith@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.
- */
-
-#include <linux/export.h>
-#include <linux/pci.h>
-
-#include <drm/drm_drv.h>
-#include <drm/drm_print.h>
-
-#include "drm_legacy.h"
-
-/**
- * drm_legacy_dma_setup() - Initialize the DMA data.
- *
- * @dev: DRM device.
- * Return: zero on success or a negative value on failure.
- *
- * Allocate and initialize a drm_device_dma structure.
- */
-int drm_legacy_dma_setup(struct drm_device *dev)
-{
- int i;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA) ||
- !drm_core_check_feature(dev, DRIVER_LEGACY))
- return 0;
-
- dev->buf_use = 0;
- atomic_set(&dev->buf_alloc, 0);
-
- dev->dma = kzalloc(sizeof(*dev->dma), GFP_KERNEL);
- if (!dev->dma)
- return -ENOMEM;
-
- for (i = 0; i <= DRM_MAX_ORDER; i++)
- memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0]));
-
- return 0;
-}
-
-/**
- * drm_legacy_dma_takedown() - Cleanup the DMA resources.
- *
- * @dev: DRM device.
- *
- * Free all pages associated with DMA buffers, the buffers and pages lists, and
- * finally the drm_device::dma structure itself.
- */
-void drm_legacy_dma_takedown(struct drm_device *dev)
-{
- struct drm_device_dma *dma = dev->dma;
- drm_dma_handle_t *dmah;
- int i, j;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA) ||
- !drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- if (!dma)
- return;
-
- /* Clear dma buffers */
- for (i = 0; i <= DRM_MAX_ORDER; i++) {
- if (dma->bufs[i].seg_count) {
- DRM_DEBUG("order %d: buf_count = %d,"
- " seg_count = %d\n",
- i,
- dma->bufs[i].buf_count,
- dma->bufs[i].seg_count);
- for (j = 0; j < dma->bufs[i].seg_count; j++) {
- if (dma->bufs[i].seglist[j]) {
- dmah = dma->bufs[i].seglist[j];
- dma_free_coherent(dev->dev,
- dmah->size,
- dmah->vaddr,
- dmah->busaddr);
- kfree(dmah);
- }
- }
- kfree(dma->bufs[i].seglist);
- }
- if (dma->bufs[i].buf_count) {
- for (j = 0; j < dma->bufs[i].buf_count; j++) {
- kfree(dma->bufs[i].buflist[j].dev_private);
- }
- kfree(dma->bufs[i].buflist);
- }
- }
-
- kfree(dma->buflist);
- kfree(dma->pagelist);
- kfree(dev->dma);
- dev->dma = NULL;
-}
-
-/**
- * drm_legacy_free_buffer() - Free a buffer.
- *
- * @dev: DRM device.
- * @buf: buffer to free.
- *
- * Resets the fields of \p buf.
- */
-void drm_legacy_free_buffer(struct drm_device *dev, struct drm_buf * buf)
-{
- if (!buf)
- return;
-
- buf->waiting = 0;
- buf->pending = 0;
- buf->file_priv = NULL;
- buf->used = 0;
-}
-
-/**
- * drm_legacy_reclaim_buffers() - Reclaim the buffers.
- *
- * @dev: DRM device.
- * @file_priv: DRM file private.
- *
- * Frees each buffer associated with \p file_priv not already on the hardware.
- */
-void drm_legacy_reclaim_buffers(struct drm_device *dev,
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- int i;
-
- if (!dma)
- return;
- for (i = 0; i < dma->buf_count; i++) {
- if (dma->buflist[i]->file_priv == file_priv) {
- switch (dma->buflist[i]->list) {
- case DRM_LIST_NONE:
- drm_legacy_free_buffer(dev, dma->buflist[i]);
- break;
- case DRM_LIST_WAIT:
- dma->buflist[i]->list = DRM_LIST_RECLAIM;
- break;
- default:
- /* Buffer already on hardware. */
- break;
- }
- }
- }
-}
+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND. USA.
- * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS 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.
- *
- *
- **************************************************************************/
-/*
- * Simple open hash tab implementation.
- *
- * Authors:
- * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
- */
-
-#include <linux/hash.h>
-#include <linux/mm.h>
-#include <linux/rculist.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <drm/drm_print.h>
-
-#include "drm_legacy.h"
-
-int drm_ht_create(struct drm_open_hash *ht, unsigned int order)
-{
- unsigned int size = 1 << order;
-
- ht->order = order;
- ht->table = NULL;
- if (size <= PAGE_SIZE / sizeof(*ht->table))
- ht->table = kcalloc(size, sizeof(*ht->table), GFP_KERNEL);
- else
- ht->table = vzalloc(array_size(size, sizeof(*ht->table)));
- if (!ht->table) {
- DRM_ERROR("Out of memory for hash table\n");
- return -ENOMEM;
- }
- return 0;
-}
-
-void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key)
-{
- struct drm_hash_item *entry;
- struct hlist_head *h_list;
- unsigned int hashed_key;
- int count = 0;
-
- hashed_key = hash_long(key, ht->order);
- DRM_DEBUG("Key is 0x%08lx, Hashed key is 0x%08x\n", key, hashed_key);
- h_list = &ht->table[hashed_key];
- hlist_for_each_entry(entry, h_list, head)
- DRM_DEBUG("count %d, key: 0x%08lx\n", count++, entry->key);
-}
-
-static struct hlist_node *drm_ht_find_key(struct drm_open_hash *ht,
- unsigned long key)
-{
- struct drm_hash_item *entry;
- struct hlist_head *h_list;
- unsigned int hashed_key;
-
- hashed_key = hash_long(key, ht->order);
- h_list = &ht->table[hashed_key];
- hlist_for_each_entry(entry, h_list, head) {
- if (entry->key == key)
- return &entry->head;
- if (entry->key > key)
- break;
- }
- return NULL;
-}
-
-static struct hlist_node *drm_ht_find_key_rcu(struct drm_open_hash *ht,
- unsigned long key)
-{
- struct drm_hash_item *entry;
- struct hlist_head *h_list;
- unsigned int hashed_key;
-
- hashed_key = hash_long(key, ht->order);
- h_list = &ht->table[hashed_key];
- hlist_for_each_entry_rcu(entry, h_list, head) {
- if (entry->key == key)
- return &entry->head;
- if (entry->key > key)
- break;
- }
- return NULL;
-}
-
-int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item)
-{
- struct drm_hash_item *entry;
- struct hlist_head *h_list;
- struct hlist_node *parent;
- unsigned int hashed_key;
- unsigned long key = item->key;
-
- hashed_key = hash_long(key, ht->order);
- h_list = &ht->table[hashed_key];
- parent = NULL;
- hlist_for_each_entry(entry, h_list, head) {
- if (entry->key == key)
- return -EINVAL;
- if (entry->key > key)
- break;
- parent = &entry->head;
- }
- if (parent) {
- hlist_add_behind_rcu(&item->head, parent);
- } else {
- hlist_add_head_rcu(&item->head, h_list);
- }
- return 0;
-}
-
-/*
- * Just insert an item and return any "bits" bit key that hasn't been
- * used before.
- */
-int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
- unsigned long seed, int bits, int shift,
- unsigned long add)
-{
- int ret;
- unsigned long mask = (1UL << bits) - 1;
- unsigned long first, unshifted_key;
-
- unshifted_key = hash_long(seed, bits);
- first = unshifted_key;
- do {
- item->key = (unshifted_key << shift) + add;
- ret = drm_ht_insert_item(ht, item);
- if (ret)
- unshifted_key = (unshifted_key + 1) & mask;
- } while(ret && (unshifted_key != first));
-
- if (ret) {
- DRM_ERROR("Available key bit space exhausted\n");
- return -EINVAL;
- }
- return 0;
-}
-
-int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key,
- struct drm_hash_item **item)
-{
- struct hlist_node *list;
-
- list = drm_ht_find_key_rcu(ht, key);
- if (!list)
- return -EINVAL;
-
- *item = hlist_entry(list, struct drm_hash_item, head);
- return 0;
-}
-
-int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key)
-{
- struct hlist_node *list;
-
- list = drm_ht_find_key(ht, key);
- if (list) {
- hlist_del_init_rcu(list);
- return 0;
- }
- return -EINVAL;
-}
-
-int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item)
-{
- hlist_del_init_rcu(&item->head);
- return 0;
-}
-
-void drm_ht_remove(struct drm_open_hash *ht)
-{
- if (ht->table) {
- kvfree(ht->table);
- ht->table = NULL;
- }
-}
/* drm_irq.c */
/* IOCTLS */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-int drm_legacy_irq_control(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-#endif
-
int drm_crtc_get_sequence_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp);
+++ /dev/null
-/*
- * drm_irq.c IRQ and vblank support
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- *
- * 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.
- */
-
-/*
- * Created: Fri Mar 19 14:30:16 1999 by faith@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.
- */
-
-
-#include <linux/export.h>
-#include <linux/interrupt.h> /* For task queue support */
-#include <linux/pci.h>
-#include <linux/vgaarb.h>
-
-#include <drm/drm.h>
-#include <drm/drm_device.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_legacy.h>
-#include <drm/drm_print.h>
-#include <drm/drm_vblank.h>
-
-#include "drm_internal.h"
-
-static int drm_legacy_irq_install(struct drm_device *dev, int irq)
-{
- int ret;
- unsigned long sh_flags = 0;
-
- if (irq == 0)
- return -EINVAL;
-
- if (dev->irq_enabled)
- return -EBUSY;
- dev->irq_enabled = true;
-
- DRM_DEBUG("irq=%d\n", irq);
-
- /* Before installing handler */
- if (dev->driver->irq_preinstall)
- dev->driver->irq_preinstall(dev);
-
- /* PCI devices require shared interrupts. */
- if (dev_is_pci(dev->dev))
- sh_flags = IRQF_SHARED;
-
- ret = request_irq(irq, dev->driver->irq_handler,
- sh_flags, dev->driver->name, dev);
-
- if (ret < 0) {
- dev->irq_enabled = false;
- return ret;
- }
-
- /* After installing handler */
- if (dev->driver->irq_postinstall)
- ret = dev->driver->irq_postinstall(dev);
-
- if (ret < 0) {
- dev->irq_enabled = false;
- if (drm_core_check_feature(dev, DRIVER_LEGACY))
- vga_client_unregister(to_pci_dev(dev->dev));
- free_irq(irq, dev);
- } else {
- dev->irq = irq;
- }
-
- return ret;
-}
-
-int drm_legacy_irq_uninstall(struct drm_device *dev)
-{
- unsigned long irqflags;
- bool irq_enabled;
- int i;
-
- irq_enabled = dev->irq_enabled;
- dev->irq_enabled = false;
-
- /*
- * Wake up any waiters so they don't hang. This is just to paper over
- * issues for UMS drivers which aren't in full control of their
- * vblank/irq handling. KMS drivers must ensure that vblanks are all
- * disabled when uninstalling the irq handler.
- */
- if (drm_dev_has_vblank(dev)) {
- spin_lock_irqsave(&dev->vbl_lock, irqflags);
- for (i = 0; i < dev->num_crtcs; i++) {
- struct drm_vblank_crtc *vblank = &dev->vblank[i];
-
- if (!vblank->enabled)
- continue;
-
- WARN_ON(drm_core_check_feature(dev, DRIVER_MODESET));
-
- drm_vblank_disable_and_save(dev, i);
- wake_up(&vblank->queue);
- }
- spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
- }
-
- if (!irq_enabled)
- return -EINVAL;
-
- DRM_DEBUG("irq=%d\n", dev->irq);
-
- if (drm_core_check_feature(dev, DRIVER_LEGACY))
- vga_client_unregister(to_pci_dev(dev->dev));
-
- if (dev->driver->irq_uninstall)
- dev->driver->irq_uninstall(dev);
-
- free_irq(dev->irq, dev);
-
- return 0;
-}
-EXPORT_SYMBOL(drm_legacy_irq_uninstall);
-
-int drm_legacy_irq_control(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_control *ctl = data;
- int ret = 0, irq;
- struct pci_dev *pdev;
-
- /* if we haven't irq we fallback for compatibility reasons -
- * this used to be a separate function in drm_dma.h
- */
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
- return 0;
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return 0;
- /* UMS was only ever supported on pci devices. */
- if (WARN_ON(!dev_is_pci(dev->dev)))
- return -EINVAL;
-
- switch (ctl->func) {
- case DRM_INST_HANDLER:
- pdev = to_pci_dev(dev->dev);
- irq = pdev->irq;
-
- if (dev->if_version < DRM_IF_VERSION(1, 2) &&
- ctl->irq != irq)
- return -EINVAL;
- mutex_lock(&dev->struct_mutex);
- ret = drm_legacy_irq_install(dev, irq);
- mutex_unlock(&dev->struct_mutex);
-
- return ret;
- case DRM_UNINST_HANDLER:
- mutex_lock(&dev->struct_mutex);
- ret = drm_legacy_irq_uninstall(dev);
- mutex_unlock(&dev->struct_mutex);
-
- return ret;
- default:
- return -EINVAL;
- }
-}
+++ /dev/null
-#ifndef __DRM_LEGACY_H__
-#define __DRM_LEGACY_H__
-
-/*
- * Copyright (c) 2014 David Herrmann <dh.herrmann@gmail.com>
- *
- * 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 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
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
- */
-
-/*
- * This file contains legacy interfaces that modern drm drivers
- * should no longer be using. They cannot be removed as legacy
- * drivers use them, and removing them are API breaks.
- */
-#include <linux/list.h>
-
-#include <drm/drm.h>
-#include <drm/drm_device.h>
-#include <drm/drm_legacy.h>
-
-struct agp_memory;
-struct drm_buf_desc;
-struct drm_device;
-struct drm_file;
-struct drm_hash_item;
-struct drm_open_hash;
-
-/*
- * Hash-table Support
- */
-
-#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
-
-/* drm_hashtab.c */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
-int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
-int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
- unsigned long seed, int bits, int shift,
- unsigned long add);
-int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
-
-void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
-int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
-int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
-void drm_ht_remove(struct drm_open_hash *ht);
-#endif
-
-/*
- * RCU-safe interface
- *
- * The user of this API needs to make sure that two or more instances of the
- * hash table manipulation functions are never run simultaneously.
- * The lookup function drm_ht_find_item_rcu may, however, run simultaneously
- * with any of the manipulation functions as long as it's called from within
- * an RCU read-locked section.
- */
-#define drm_ht_insert_item_rcu drm_ht_insert_item
-#define drm_ht_just_insert_please_rcu drm_ht_just_insert_please
-#define drm_ht_remove_key_rcu drm_ht_remove_key
-#define drm_ht_remove_item_rcu drm_ht_remove_item
-#define drm_ht_find_item_rcu drm_ht_find_item
-
-/*
- * Generic DRM Contexts
- */
-
-#define DRM_KERNEL_CONTEXT 0
-#define DRM_RESERVED_CONTEXTS 1
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_ctxbitmap_init(struct drm_device *dev);
-void drm_legacy_ctxbitmap_cleanup(struct drm_device *dev);
-void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file);
-#else
-static inline void drm_legacy_ctxbitmap_init(struct drm_device *dev) {}
-static inline void drm_legacy_ctxbitmap_cleanup(struct drm_device *dev) {}
-static inline void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file) {}
-#endif
-
-void drm_legacy_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-int drm_legacy_resctx(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_addctx(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_getctx(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_switchctx(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_newctx(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_rmctx(struct drm_device *d, void *v, struct drm_file *f);
-
-int drm_legacy_setsareactx(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_getsareactx(struct drm_device *d, void *v, struct drm_file *f);
-#endif
-
-/*
- * Generic Buffer Management
- */
-
-#define DRM_MAP_HASH_OFFSET 0x10000000
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-static inline int drm_legacy_create_map_hash(struct drm_device *dev)
-{
- return drm_ht_create(&dev->map_hash, 12);
-}
-
-static inline void drm_legacy_remove_map_hash(struct drm_device *dev)
-{
- drm_ht_remove(&dev->map_hash);
-}
-#else
-static inline int drm_legacy_create_map_hash(struct drm_device *dev)
-{
- return 0;
-}
-
-static inline void drm_legacy_remove_map_hash(struct drm_device *dev) {}
-#endif
-
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_addmap_ioctl(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_rmmap_ioctl(struct drm_device *d, void *v, struct drm_file *f);
-
-int drm_legacy_addbufs(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_infobufs(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_markbufs(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_freebufs(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_mapbufs(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_dma_ioctl(struct drm_device *d, void *v, struct drm_file *f);
-#endif
-
-int __drm_legacy_infobufs(struct drm_device *, void *, int *,
- int (*)(void *, int, struct drm_buf_entry *));
-int __drm_legacy_mapbufs(struct drm_device *, void *, int *,
- void __user **,
- int (*)(void *, int, unsigned long, struct drm_buf *),
- struct drm_file *);
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_master_rmmaps(struct drm_device *dev,
- struct drm_master *master);
-void drm_legacy_rmmaps(struct drm_device *dev);
-#else
-static inline void drm_legacy_master_rmmaps(struct drm_device *dev,
- struct drm_master *master) {}
-static inline void drm_legacy_rmmaps(struct drm_device *dev) {}
-#endif
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_vma_flush(struct drm_device *d);
-#else
-static inline void drm_legacy_vma_flush(struct drm_device *d)
-{
- /* do nothing */
-}
-#endif
-
-/*
- * AGP Support
- */
-
-struct drm_agp_mem {
- unsigned long handle;
- struct agp_memory *memory;
- unsigned long bound;
- int pages;
- struct list_head head;
-};
-
-/* drm_agpsupport.c */
-#if IS_ENABLED(CONFIG_DRM_LEGACY) && IS_ENABLED(CONFIG_AGP)
-void drm_legacy_agp_clear(struct drm_device *dev);
-
-int drm_legacy_agp_acquire_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_agp_release_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_agp_enable_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_agp_info_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_agp_alloc_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_agp_free_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_agp_unbind_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_agp_bind_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-#else
-static inline void drm_legacy_agp_clear(struct drm_device *dev) {}
-#endif
-
-/* drm_lock.c */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-int drm_legacy_lock(struct drm_device *d, void *v, struct drm_file *f);
-int drm_legacy_unlock(struct drm_device *d, void *v, struct drm_file *f);
-void drm_legacy_lock_release(struct drm_device *dev, struct file *filp);
-#else
-static inline void drm_legacy_lock_release(struct drm_device *dev, struct file *filp) {}
-#endif
-
-/* DMA support */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-int drm_legacy_dma_setup(struct drm_device *dev);
-void drm_legacy_dma_takedown(struct drm_device *dev);
-#else
-static inline int drm_legacy_dma_setup(struct drm_device *dev)
-{
- return 0;
-}
-#endif
-
-void drm_legacy_free_buffer(struct drm_device *dev,
- struct drm_buf * buf);
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_reclaim_buffers(struct drm_device *dev,
- struct drm_file *filp);
-#else
-static inline void drm_legacy_reclaim_buffers(struct drm_device *dev,
- struct drm_file *filp) {}
-#endif
-
-/* Scatter Gather Support */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_sg_cleanup(struct drm_device *dev);
-int drm_legacy_sg_alloc(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int drm_legacy_sg_free(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-#endif
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_init_members(struct drm_device *dev);
-void drm_legacy_destroy_members(struct drm_device *dev);
-void drm_legacy_dev_reinit(struct drm_device *dev);
-int drm_legacy_setup(struct drm_device * dev);
-#else
-static inline void drm_legacy_init_members(struct drm_device *dev) {}
-static inline void drm_legacy_destroy_members(struct drm_device *dev) {}
-static inline void drm_legacy_dev_reinit(struct drm_device *dev) {}
-static inline int drm_legacy_setup(struct drm_device * dev) { return 0; }
-#endif
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_lock_master_cleanup(struct drm_device *dev, struct drm_master *master);
-#else
-static inline void drm_legacy_lock_master_cleanup(struct drm_device *dev, struct drm_master *master) {}
-#endif
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_master_legacy_init(struct drm_master *master);
-#else
-static inline void drm_master_legacy_init(struct drm_master *master) {}
-#endif
-
-/* drm_pci.c */
-#if IS_ENABLED(CONFIG_DRM_LEGACY) && IS_ENABLED(CONFIG_PCI)
-int drm_legacy_irq_by_busid(struct drm_device *dev, void *data, struct drm_file *file_priv);
-void drm_legacy_pci_agp_destroy(struct drm_device *dev);
-#else
-static inline int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- return -EINVAL;
-}
-
-static inline void drm_legacy_pci_agp_destroy(struct drm_device *dev) {}
-#endif
-
-#endif /* __DRM_LEGACY_H__ */
+++ /dev/null
-/*
- * \file drm_legacy_misc.c
- * Misc legacy support functions.
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Tue Feb 2 08:37:54 1999 by faith@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 <drm/drm_device.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_print.h>
-
-#include "drm_internal.h"
-#include "drm_legacy.h"
-
-void drm_legacy_init_members(struct drm_device *dev)
-{
- INIT_LIST_HEAD(&dev->ctxlist);
- INIT_LIST_HEAD(&dev->vmalist);
- INIT_LIST_HEAD(&dev->maplist);
- spin_lock_init(&dev->buf_lock);
- mutex_init(&dev->ctxlist_mutex);
-}
-
-void drm_legacy_destroy_members(struct drm_device *dev)
-{
- mutex_destroy(&dev->ctxlist_mutex);
-}
-
-int drm_legacy_setup(struct drm_device * dev)
-{
- int ret;
-
- if (dev->driver->firstopen &&
- drm_core_check_feature(dev, DRIVER_LEGACY)) {
- ret = dev->driver->firstopen(dev);
- if (ret != 0)
- return ret;
- }
-
- ret = drm_legacy_dma_setup(dev);
- if (ret < 0)
- return ret;
-
-
- DRM_DEBUG("\n");
- return 0;
-}
-
-void drm_legacy_dev_reinit(struct drm_device *dev)
-{
- if (dev->irq_enabled)
- drm_legacy_irq_uninstall(dev);
-
- mutex_lock(&dev->struct_mutex);
-
- drm_legacy_agp_clear(dev);
-
- drm_legacy_sg_cleanup(dev);
- drm_legacy_vma_flush(dev);
- drm_legacy_dma_takedown(dev);
-
- mutex_unlock(&dev->struct_mutex);
-
- dev->sigdata.lock = NULL;
-
- dev->context_flag = 0;
- dev->last_context = 0;
- dev->if_version = 0;
-
- DRM_DEBUG("lastclose completed\n");
-}
-
-void drm_master_legacy_init(struct drm_master *master)
-{
- spin_lock_init(&master->lock.spinlock);
- init_waitqueue_head(&master->lock.lock_queue);
-}
+++ /dev/null
-/*
- * \file drm_lock.c
- * IOCTLs for locking
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Tue Feb 2 08:37:54 1999 by faith@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 <linux/export.h>
-#include <linux/sched/signal.h>
-
-#include <drm/drm.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-#include <drm/drm_print.h>
-
-#include "drm_internal.h"
-#include "drm_legacy.h"
-
-static int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context);
-
-/*
- * Take the heavyweight lock.
- *
- * \param lock lock pointer.
- * \param context locking context.
- * \return one if the lock is held, or zero otherwise.
- *
- * Attempt to mark the lock as held by the given context, via the \p cmpxchg instruction.
- */
-static
-int drm_lock_take(struct drm_lock_data *lock_data,
- unsigned int context)
-{
- unsigned int old, new, prev;
- volatile unsigned int *lock = &lock_data->hw_lock->lock;
-
- spin_lock_bh(&lock_data->spinlock);
- do {
- old = *lock;
- if (old & _DRM_LOCK_HELD)
- new = old | _DRM_LOCK_CONT;
- else {
- new = context | _DRM_LOCK_HELD |
- ((lock_data->user_waiters + lock_data->kernel_waiters > 1) ?
- _DRM_LOCK_CONT : 0);
- }
- prev = cmpxchg(lock, old, new);
- } while (prev != old);
- spin_unlock_bh(&lock_data->spinlock);
-
- if (_DRM_LOCKING_CONTEXT(old) == context) {
- if (old & _DRM_LOCK_HELD) {
- if (context != DRM_KERNEL_CONTEXT) {
- DRM_ERROR("%d holds heavyweight lock\n",
- context);
- }
- return 0;
- }
- }
-
- if ((_DRM_LOCKING_CONTEXT(new)) == context && (new & _DRM_LOCK_HELD)) {
- /* Have lock */
- return 1;
- }
- return 0;
-}
-
-/*
- * This takes a lock forcibly and hands it to context. Should ONLY be used
- * inside *_unlock to give lock to kernel before calling *_dma_schedule.
- *
- * \param dev DRM device.
- * \param lock lock pointer.
- * \param context locking context.
- * \return always one.
- *
- * Resets the lock file pointer.
- * Marks the lock as held by the given context, via the \p cmpxchg instruction.
- */
-static int drm_lock_transfer(struct drm_lock_data *lock_data,
- unsigned int context)
-{
- unsigned int old, new, prev;
- volatile unsigned int *lock = &lock_data->hw_lock->lock;
-
- lock_data->file_priv = NULL;
- do {
- old = *lock;
- new = context | _DRM_LOCK_HELD;
- prev = cmpxchg(lock, old, new);
- } while (prev != old);
- return 1;
-}
-
-static int drm_legacy_lock_free(struct drm_lock_data *lock_data,
- unsigned int context)
-{
- unsigned int old, new, prev;
- volatile unsigned int *lock = &lock_data->hw_lock->lock;
-
- spin_lock_bh(&lock_data->spinlock);
- if (lock_data->kernel_waiters != 0) {
- drm_lock_transfer(lock_data, 0);
- lock_data->idle_has_lock = 1;
- spin_unlock_bh(&lock_data->spinlock);
- return 1;
- }
- spin_unlock_bh(&lock_data->spinlock);
-
- do {
- old = *lock;
- new = _DRM_LOCKING_CONTEXT(old);
- prev = cmpxchg(lock, old, new);
- } while (prev != old);
-
- if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) {
- DRM_ERROR("%d freed heavyweight lock held by %d\n",
- context, _DRM_LOCKING_CONTEXT(old));
- return 1;
- }
- wake_up_interruptible(&lock_data->lock_queue);
- return 0;
-}
-
-/*
- * Lock ioctl.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_lock structure.
- * \return zero on success or negative number on failure.
- *
- * Add the current task to the lock wait queue, and attempt to take to lock.
- */
-int drm_legacy_lock(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- DECLARE_WAITQUEUE(entry, current);
- struct drm_lock *lock = data;
- struct drm_master *master = file_priv->master;
- int ret = 0;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- ++file_priv->lock_count;
-
- if (lock->context == DRM_KERNEL_CONTEXT) {
- DRM_ERROR("Process %d using kernel context %d\n",
- task_pid_nr(current), lock->context);
- return -EINVAL;
- }
-
- DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
- lock->context, task_pid_nr(current),
- master->lock.hw_lock ? master->lock.hw_lock->lock : -1,
- lock->flags);
-
- add_wait_queue(&master->lock.lock_queue, &entry);
- spin_lock_bh(&master->lock.spinlock);
- master->lock.user_waiters++;
- spin_unlock_bh(&master->lock.spinlock);
-
- for (;;) {
- __set_current_state(TASK_INTERRUPTIBLE);
- if (!master->lock.hw_lock) {
- /* Device has been unregistered */
- send_sig(SIGTERM, current, 0);
- ret = -EINTR;
- break;
- }
- if (drm_lock_take(&master->lock, lock->context)) {
- master->lock.file_priv = file_priv;
- master->lock.lock_time = jiffies;
- break; /* Got lock */
- }
-
- /* Contention */
- mutex_unlock(&drm_global_mutex);
- schedule();
- mutex_lock(&drm_global_mutex);
- if (signal_pending(current)) {
- ret = -EINTR;
- break;
- }
- }
- spin_lock_bh(&master->lock.spinlock);
- master->lock.user_waiters--;
- spin_unlock_bh(&master->lock.spinlock);
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&master->lock.lock_queue, &entry);
-
- DRM_DEBUG("%d %s\n", lock->context,
- ret ? "interrupted" : "has lock");
- if (ret) return ret;
-
- /* don't set the block all signals on the master process for now
- * really probably not the correct answer but lets us debug xkb
- * xserver for now */
- if (!drm_is_current_master(file_priv)) {
- dev->sigdata.context = lock->context;
- dev->sigdata.lock = master->lock.hw_lock;
- }
-
- if (dev->driver->dma_quiescent && (lock->flags & _DRM_LOCK_QUIESCENT))
- {
- if (dev->driver->dma_quiescent(dev)) {
- DRM_DEBUG("%d waiting for DMA quiescent\n",
- lock->context);
- return -EBUSY;
- }
- }
-
- return 0;
-}
-
-/*
- * Unlock ioctl.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_lock structure.
- * \return zero on success or negative number on failure.
- *
- * Transfer and free the lock.
- */
-int drm_legacy_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- struct drm_lock *lock = data;
- struct drm_master *master = file_priv->master;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (lock->context == DRM_KERNEL_CONTEXT) {
- DRM_ERROR("Process %d using kernel context %d\n",
- task_pid_nr(current), lock->context);
- return -EINVAL;
- }
-
- if (drm_legacy_lock_free(&master->lock, lock->context)) {
- /* FIXME: Should really bail out here. */
- }
-
- return 0;
-}
-
-/*
- * This function returns immediately and takes the hw lock
- * with the kernel context if it is free, otherwise it gets the highest priority when and if
- * it is eventually released.
- *
- * This guarantees that the kernel will _eventually_ have the lock _unless_ it is held
- * by a blocked process. (In the latter case an explicit wait for the hardware lock would cause
- * a deadlock, which is why the "idlelock" was invented).
- *
- * This should be sufficient to wait for GPU idle without
- * having to worry about starvation.
- */
-void drm_legacy_idlelock_take(struct drm_lock_data *lock_data)
-{
- int ret;
-
- spin_lock_bh(&lock_data->spinlock);
- lock_data->kernel_waiters++;
- if (!lock_data->idle_has_lock) {
-
- spin_unlock_bh(&lock_data->spinlock);
- ret = drm_lock_take(lock_data, DRM_KERNEL_CONTEXT);
- spin_lock_bh(&lock_data->spinlock);
-
- if (ret == 1)
- lock_data->idle_has_lock = 1;
- }
- spin_unlock_bh(&lock_data->spinlock);
-}
-EXPORT_SYMBOL(drm_legacy_idlelock_take);
-
-void drm_legacy_idlelock_release(struct drm_lock_data *lock_data)
-{
- unsigned int old, prev;
- volatile unsigned int *lock = &lock_data->hw_lock->lock;
-
- spin_lock_bh(&lock_data->spinlock);
- if (--lock_data->kernel_waiters == 0) {
- if (lock_data->idle_has_lock) {
- do {
- old = *lock;
- prev = cmpxchg(lock, old, DRM_KERNEL_CONTEXT);
- } while (prev != old);
- wake_up_interruptible(&lock_data->lock_queue);
- lock_data->idle_has_lock = 0;
- }
- }
- spin_unlock_bh(&lock_data->spinlock);
-}
-EXPORT_SYMBOL(drm_legacy_idlelock_release);
-
-static int drm_legacy_i_have_hw_lock(struct drm_device *dev,
- struct drm_file *file_priv)
-{
- struct drm_master *master = file_priv->master;
-
- return (file_priv->lock_count && master->lock.hw_lock &&
- _DRM_LOCK_IS_HELD(master->lock.hw_lock->lock) &&
- master->lock.file_priv == file_priv);
-}
-
-void drm_legacy_lock_release(struct drm_device *dev, struct file *filp)
-{
- struct drm_file *file_priv = filp->private_data;
-
- /* if the master has gone away we can't do anything with the lock */
- if (!dev->master)
- return;
-
- if (drm_legacy_i_have_hw_lock(dev, file_priv)) {
- DRM_DEBUG("File %p released, freeing lock for context %d\n",
- filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
- drm_legacy_lock_free(&file_priv->master->lock,
- _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
- }
-}
-
-void drm_legacy_lock_master_cleanup(struct drm_device *dev, struct drm_master *master)
-{
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return;
-
- /*
- * Since the master is disappearing, so is the
- * possibility to lock.
- */
- mutex_lock(&dev->struct_mutex);
- if (master->lock.hw_lock) {
- if (dev->sigdata.lock == master->lock.hw_lock)
- dev->sigdata.lock = NULL;
- master->lock.hw_lock = NULL;
- master->lock.file_priv = NULL;
- wake_up_interruptible_all(&master->lock.lock_queue);
- }
- mutex_unlock(&dev->struct_mutex);
-}
+++ /dev/null
-/*
- * \file drm_memory.c
- * Memory management wrappers for DRM
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Thu Feb 4 14:00:34 1999 by faith@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 <linux/export.h>
-#include <linux/highmem.h>
-#include <linux/pci.h>
-#include <linux/vmalloc.h>
-
-#include <drm/drm_cache.h>
-#include <drm/drm_device.h>
-
-#include "drm_legacy.h"
-
-#if IS_ENABLED(CONFIG_AGP)
-
-#ifdef HAVE_PAGE_AGP
-# include <asm/agp.h>
-#else
-# ifdef __powerpc__
-# define PAGE_AGP pgprot_noncached_wc(PAGE_KERNEL)
-# else
-# define PAGE_AGP PAGE_KERNEL
-# endif
-#endif
-
-static void *agp_remap(unsigned long offset, unsigned long size,
- struct drm_device *dev)
-{
- unsigned long i, num_pages =
- PAGE_ALIGN(size) / PAGE_SIZE;
- struct drm_agp_mem *agpmem;
- struct page **page_map;
- struct page **phys_page_map;
- void *addr;
-
- size = PAGE_ALIGN(size);
-
-#ifdef __alpha__
- offset -= dev->hose->mem_space->start;
-#endif
-
- list_for_each_entry(agpmem, &dev->agp->memory, head)
- if (agpmem->bound <= offset
- && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >=
- (offset + size))
- break;
- if (&agpmem->head == &dev->agp->memory)
- return NULL;
-
- /*
- * OK, we're mapping AGP space on a chipset/platform on which memory accesses by
- * the CPU do not get remapped by the GART. We fix this by using the kernel's
- * page-table instead (that's probably faster anyhow...).
- */
- /* note: use vmalloc() because num_pages could be large... */
- page_map = vmalloc(array_size(num_pages, sizeof(struct page *)));
- if (!page_map)
- return NULL;
-
- phys_page_map = (agpmem->memory->pages + (offset - agpmem->bound) / PAGE_SIZE);
- for (i = 0; i < num_pages; ++i)
- page_map[i] = phys_page_map[i];
- addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
- vfree(page_map);
-
- return addr;
-}
-
-#else /* CONFIG_AGP */
-static inline void *agp_remap(unsigned long offset, unsigned long size,
- struct drm_device *dev)
-{
- return NULL;
-}
-
-#endif /* CONFIG_AGP */
-
-void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev)
-{
- if (dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
- map->handle = agp_remap(map->offset, map->size, dev);
- else
- map->handle = ioremap(map->offset, map->size);
-}
-EXPORT_SYMBOL(drm_legacy_ioremap);
-
-void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev)
-{
- if (dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
- map->handle = agp_remap(map->offset, map->size, dev);
- else
- map->handle = ioremap_wc(map->offset, map->size);
-}
-EXPORT_SYMBOL(drm_legacy_ioremap_wc);
-
-void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
-{
- if (!map->handle || !map->size)
- return;
-
- if (dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
- vunmap(map->handle);
- else
- iounmap(map->handle);
-}
-EXPORT_SYMBOL(drm_legacy_ioremapfree);
#include <drm/drm_print.h>
#include "drm_internal.h"
-#include "drm_legacy.h"
-
-#ifdef CONFIG_DRM_LEGACY
-/* List of devices hanging off drivers with stealth attach. */
-static LIST_HEAD(legacy_dev_list);
-static DEFINE_MUTEX(legacy_dev_list_lock);
-#endif
static int drm_get_pci_domain(struct drm_device *dev)
{
master->unique_len = strlen(master->unique);
return 0;
}
-
-#ifdef CONFIG_DRM_LEGACY
-
-static int drm_legacy_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
-{
- struct pci_dev *pdev = to_pci_dev(dev->dev);
-
- if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
- (p->busnum & 0xff) != pdev->bus->number ||
- p->devnum != PCI_SLOT(pdev->devfn) || p->funcnum != PCI_FUNC(pdev->devfn))
- return -EINVAL;
-
- p->irq = pdev->irq;
-
- DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
- p->irq);
- return 0;
-}
-
-/**
- * drm_legacy_irq_by_busid - Get interrupt from bus ID
- * @dev: DRM device
- * @data: IOCTL parameter pointing to a drm_irq_busid structure
- * @file_priv: DRM file private.
- *
- * Finds the PCI device with the specified bus id and gets its IRQ number.
- * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
- * to that of the device that this DRM instance attached to.
- *
- * Return: 0 on success or a negative error code on failure.
- */
-int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_irq_busid *p = data;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- /* UMS was only ever support on PCI devices. */
- if (WARN_ON(!dev_is_pci(dev->dev)))
- return -EINVAL;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
- return -EOPNOTSUPP;
-
- return drm_legacy_pci_irq_by_busid(dev, p);
-}
-
-void drm_legacy_pci_agp_destroy(struct drm_device *dev)
-{
- if (dev->agp) {
- arch_phys_wc_del(dev->agp->agp_mtrr);
- drm_legacy_agp_clear(dev);
- kfree(dev->agp);
- dev->agp = NULL;
- }
-}
-
-static void drm_legacy_pci_agp_init(struct drm_device *dev)
-{
- if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
- if (pci_find_capability(to_pci_dev(dev->dev), PCI_CAP_ID_AGP))
- dev->agp = drm_legacy_agp_init(dev);
- if (dev->agp) {
- dev->agp->agp_mtrr = arch_phys_wc_add(
- dev->agp->agp_info.aper_base,
- dev->agp->agp_info.aper_size *
- 1024 * 1024);
- }
- }
-}
-
-static int drm_legacy_get_pci_dev(struct pci_dev *pdev,
- const struct pci_device_id *ent,
- const struct drm_driver *driver)
-{
- struct drm_device *dev;
- int ret;
-
- DRM_DEBUG("\n");
-
- dev = drm_dev_alloc(driver, &pdev->dev);
- if (IS_ERR(dev))
- return PTR_ERR(dev);
-
- ret = pci_enable_device(pdev);
- if (ret)
- goto err_free;
-
-#ifdef __alpha__
- dev->hose = pdev->sysdata;
-#endif
-
- drm_legacy_pci_agp_init(dev);
-
- ret = drm_dev_register(dev, ent->driver_data);
- if (ret)
- goto err_agp;
-
- if (drm_core_check_feature(dev, DRIVER_LEGACY)) {
- mutex_lock(&legacy_dev_list_lock);
- list_add_tail(&dev->legacy_dev_list, &legacy_dev_list);
- mutex_unlock(&legacy_dev_list_lock);
- }
-
- return 0;
-
-err_agp:
- drm_legacy_pci_agp_destroy(dev);
- pci_disable_device(pdev);
-err_free:
- drm_dev_put(dev);
- return ret;
-}
-
-/**
- * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
- * @driver: DRM device driver
- * @pdriver: PCI device driver
- *
- * This is only used by legacy dri1 drivers and deprecated.
- *
- * Return: 0 on success or a negative error code on failure.
- */
-int drm_legacy_pci_init(const struct drm_driver *driver,
- struct pci_driver *pdriver)
-{
- struct pci_dev *pdev = NULL;
- const struct pci_device_id *pid;
- int i;
-
- DRM_DEBUG("\n");
-
- if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
- return -EINVAL;
-
- /* If not using KMS, fall back to stealth mode manual scanning. */
- for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
- pid = &pdriver->id_table[i];
-
- /* Loop around setting up a DRM device for each PCI device
- * matching our ID and device class. If we had the internal
- * function that pci_get_subsys and pci_get_class used, we'd
- * be able to just pass pid in instead of doing a two-stage
- * thing.
- */
- pdev = NULL;
- while ((pdev =
- pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
- pid->subdevice, pdev)) != NULL) {
- if ((pdev->class & pid->class_mask) != pid->class)
- continue;
-
- /* stealth mode requires a manual probe */
- pci_dev_get(pdev);
- drm_legacy_get_pci_dev(pdev, pid, driver);
- }
- }
- return 0;
-}
-EXPORT_SYMBOL(drm_legacy_pci_init);
-
-/**
- * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
- * @driver: DRM device driver
- * @pdriver: PCI device driver
- *
- * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
- * is deprecated and only used by dri1 drivers.
- */
-void drm_legacy_pci_exit(const struct drm_driver *driver,
- struct pci_driver *pdriver)
-{
- struct drm_device *dev, *tmp;
-
- DRM_DEBUG("\n");
-
- if (!(driver->driver_features & DRIVER_LEGACY)) {
- WARN_ON(1);
- } else {
- mutex_lock(&legacy_dev_list_lock);
- list_for_each_entry_safe(dev, tmp, &legacy_dev_list,
- legacy_dev_list) {
- if (dev->driver == driver) {
- list_del(&dev->legacy_dev_list);
- drm_put_dev(dev);
- }
- }
- mutex_unlock(&legacy_dev_list_lock);
- }
- DRM_INFO("Module unloaded\n");
-}
-EXPORT_SYMBOL(drm_legacy_pci_exit);
-
-#endif
+++ /dev/null
-/*
- * \file drm_scatter.c
- * IOCTLs to manage scatter/gather memory
- *
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com
- *
- * 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
- * PRECISION INSIGHT 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 <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <drm/drm.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_print.h>
-
-#include "drm_legacy.h"
-
-#define DEBUG_SCATTER 0
-
-static void drm_sg_cleanup(struct drm_sg_mem * entry)
-{
- struct page *page;
- int i;
-
- for (i = 0; i < entry->pages; i++) {
- page = entry->pagelist[i];
- if (page)
- ClearPageReserved(page);
- }
-
- vfree(entry->virtual);
-
- kfree(entry->busaddr);
- kfree(entry->pagelist);
- kfree(entry);
-}
-
-void drm_legacy_sg_cleanup(struct drm_device *dev)
-{
- if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg &&
- drm_core_check_feature(dev, DRIVER_LEGACY)) {
- drm_sg_cleanup(dev->sg);
- dev->sg = NULL;
- }
-}
-#ifdef _LP64
-# define ScatterHandle(x) (unsigned int)((x >> 32) + (x & ((1L << 32) - 1)))
-#else
-# define ScatterHandle(x) (unsigned int)(x)
-#endif
-
-int drm_legacy_sg_alloc(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_scatter_gather *request = data;
- struct drm_sg_mem *entry;
- unsigned long pages, i, j;
-
- DRM_DEBUG("\n");
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (!drm_core_check_feature(dev, DRIVER_SG))
- return -EOPNOTSUPP;
-
- if (request->size > SIZE_MAX - PAGE_SIZE)
- return -EINVAL;
-
- if (dev->sg)
- return -EINVAL;
-
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry)
- return -ENOMEM;
-
- pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
- DRM_DEBUG("size=%ld pages=%ld\n", request->size, pages);
-
- entry->pages = pages;
- entry->pagelist = kcalloc(pages, sizeof(*entry->pagelist), GFP_KERNEL);
- if (!entry->pagelist) {
- kfree(entry);
- return -ENOMEM;
- }
-
- entry->busaddr = kcalloc(pages, sizeof(*entry->busaddr), GFP_KERNEL);
- if (!entry->busaddr) {
- kfree(entry->pagelist);
- kfree(entry);
- return -ENOMEM;
- }
-
- entry->virtual = vmalloc_32(pages << PAGE_SHIFT);
- if (!entry->virtual) {
- kfree(entry->busaddr);
- kfree(entry->pagelist);
- kfree(entry);
- return -ENOMEM;
- }
-
- /* This also forces the mapping of COW pages, so our page list
- * will be valid. Please don't remove it...
- */
- memset(entry->virtual, 0, pages << PAGE_SHIFT);
-
- entry->handle = ScatterHandle((unsigned long)entry->virtual);
-
- DRM_DEBUG("handle = %08lx\n", entry->handle);
- DRM_DEBUG("virtual = %p\n", entry->virtual);
-
- for (i = (unsigned long)entry->virtual, j = 0; j < pages;
- i += PAGE_SIZE, j++) {
- entry->pagelist[j] = vmalloc_to_page((void *)i);
- if (!entry->pagelist[j])
- goto failed;
- SetPageReserved(entry->pagelist[j]);
- }
-
- request->handle = entry->handle;
-
- dev->sg = entry;
-
-#if DEBUG_SCATTER
- /* Verify that each page points to its virtual address, and vice
- * versa.
- */
- {
- int error = 0;
-
- for (i = 0; i < pages; i++) {
- unsigned long *tmp;
-
- tmp = page_address(entry->pagelist[i]);
- for (j = 0;
- j < PAGE_SIZE / sizeof(unsigned long);
- j++, tmp++) {
- *tmp = 0xcafebabe;
- }
- tmp = (unsigned long *)((u8 *) entry->virtual +
- (PAGE_SIZE * i));
- for (j = 0;
- j < PAGE_SIZE / sizeof(unsigned long);
- j++, tmp++) {
- if (*tmp != 0xcafebabe && error == 0) {
- error = 1;
- DRM_ERROR("Scatter allocation error, "
- "pagelist does not match "
- "virtual mapping\n");
- }
- }
- tmp = page_address(entry->pagelist[i]);
- for (j = 0;
- j < PAGE_SIZE / sizeof(unsigned long);
- j++, tmp++) {
- *tmp = 0;
- }
- }
- if (error == 0)
- DRM_ERROR("Scatter allocation matches pagelist\n");
- }
-#endif
-
- return 0;
-
- failed:
- drm_sg_cleanup(entry);
- return -ENOMEM;
-}
-
-int drm_legacy_sg_free(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_scatter_gather *request = data;
- struct drm_sg_mem *entry;
-
- if (!drm_core_check_feature(dev, DRIVER_LEGACY))
- return -EOPNOTSUPP;
-
- if (!drm_core_check_feature(dev, DRIVER_SG))
- return -EOPNOTSUPP;
-
- entry = dev->sg;
- dev->sg = NULL;
-
- if (!entry || entry->handle != request->handle)
- return -EINVAL;
-
- DRM_DEBUG("virtual = %p\n", entry->virtual);
-
- drm_sg_cleanup(entry);
-
- return 0;
-}
+++ /dev/null
-/*
- * \file drm_vm.c
- * Memory mapping for DRM
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Mon Jan 4 08:58:31 1999 by faith@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 <linux/export.h>
-#include <linux/pci.h>
-#include <linux/seq_file.h>
-#include <linux/vmalloc.h>
-#include <linux/pgtable.h>
-
-#if defined(__ia64__)
-#include <linux/efi.h>
-#include <linux/slab.h>
-#endif
-#include <linux/mem_encrypt.h>
-
-#include <drm/drm_device.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-#include <drm/drm_framebuffer.h>
-#include <drm/drm_print.h>
-
-#include "drm_internal.h"
-#include "drm_legacy.h"
-
-struct drm_vma_entry {
- struct list_head head;
- struct vm_area_struct *vma;
- pid_t pid;
-};
-
-static void drm_vm_open(struct vm_area_struct *vma);
-static void drm_vm_close(struct vm_area_struct *vma);
-
-static pgprot_t drm_io_prot(struct drm_local_map *map,
- struct vm_area_struct *vma)
-{
- pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
-
-#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) || \
- defined(__mips__) || defined(__loongarch__)
- if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING))
- tmp = pgprot_noncached(tmp);
- else
- tmp = pgprot_writecombine(tmp);
-#elif defined(__ia64__)
- if (efi_range_is_wc(vma->vm_start, vma->vm_end -
- vma->vm_start))
- tmp = pgprot_writecombine(tmp);
- else
- tmp = pgprot_noncached(tmp);
-#elif defined(__sparc__) || defined(__arm__)
- tmp = pgprot_noncached(tmp);
-#endif
- return tmp;
-}
-
-static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma)
-{
- pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
-
-#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
- tmp = pgprot_noncached_wc(tmp);
-#endif
- return tmp;
-}
-
-/*
- * \c fault method for AGP virtual memory.
- *
- * \param vma virtual memory area.
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Find the right map and if it's AGP memory find the real physical page to
- * map, get the page, increment the use count and return it.
- */
-#if IS_ENABLED(CONFIG_AGP)
-static vm_fault_t drm_vm_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_local_map *map = NULL;
- struct drm_map_list *r_list;
- struct drm_hash_item *hash;
-
- /*
- * Find the right map
- */
- if (!dev->agp)
- goto vm_fault_error;
-
- if (!dev->agp || !dev->agp->cant_use_aperture)
- goto vm_fault_error;
-
- if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash))
- goto vm_fault_error;
-
- r_list = drm_hash_entry(hash, struct drm_map_list, hash);
- map = r_list->map;
-
- if (map && map->type == _DRM_AGP) {
- /*
- * Using vm_pgoff as a selector forces us to use this unusual
- * addressing scheme.
- */
- resource_size_t offset = vmf->address - vma->vm_start;
- resource_size_t baddr = map->offset + offset;
- struct drm_agp_mem *agpmem;
- struct page *page;
-
-#ifdef __alpha__
- /*
- * Adjust to a bus-relative address
- */
- baddr -= dev->hose->mem_space->start;
-#endif
-
- /*
- * It's AGP memory - find the real physical page to map
- */
- list_for_each_entry(agpmem, &dev->agp->memory, head) {
- if (agpmem->bound <= baddr &&
- agpmem->bound + agpmem->pages * PAGE_SIZE > baddr)
- break;
- }
-
- if (&agpmem->head == &dev->agp->memory)
- goto vm_fault_error;
-
- /*
- * Get the page, inc the use count, and return it
- */
- offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
- page = agpmem->memory->pages[offset];
- get_page(page);
- vmf->page = page;
-
- DRM_DEBUG
- ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n",
- (unsigned long long)baddr,
- agpmem->memory->pages[offset],
- (unsigned long long)offset,
- page_count(page));
- return 0;
- }
-vm_fault_error:
- return VM_FAULT_SIGBUS; /* Disallow mremap */
-}
-#else
-static vm_fault_t drm_vm_fault(struct vm_fault *vmf)
-{
- return VM_FAULT_SIGBUS;
-}
-#endif
-
-/*
- * \c nopage method for shared virtual memory.
- *
- * \param vma virtual memory area.
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Get the mapping, find the real physical page to map, get the page, and
- * return it.
- */
-static vm_fault_t drm_vm_shm_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct drm_local_map *map = vma->vm_private_data;
- unsigned long offset;
- unsigned long i;
- struct page *page;
-
- if (!map)
- return VM_FAULT_SIGBUS; /* Nothing allocated */
-
- offset = vmf->address - vma->vm_start;
- i = (unsigned long)map->handle + offset;
- page = vmalloc_to_page((void *)i);
- if (!page)
- return VM_FAULT_SIGBUS;
- get_page(page);
- vmf->page = page;
-
- DRM_DEBUG("shm_fault 0x%lx\n", offset);
- return 0;
-}
-
-/*
- * \c close method for shared virtual memory.
- *
- * \param vma virtual memory area.
- *
- * Deletes map information if we are the last
- * person to close a mapping and it's not in the global maplist.
- */
-static void drm_vm_shm_close(struct vm_area_struct *vma)
-{
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_vma_entry *pt, *temp;
- struct drm_local_map *map;
- struct drm_map_list *r_list;
- int found_maps = 0;
-
- DRM_DEBUG("0x%08lx,0x%08lx\n",
- vma->vm_start, vma->vm_end - vma->vm_start);
-
- map = vma->vm_private_data;
-
- mutex_lock(&dev->struct_mutex);
- list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
- if (pt->vma->vm_private_data == map)
- found_maps++;
- if (pt->vma == vma) {
- list_del(&pt->head);
- kfree(pt);
- }
- }
-
- /* We were the only map that was found */
- if (found_maps == 1 && map->flags & _DRM_REMOVABLE) {
- /* Check to see if we are in the maplist, if we are not, then
- * we delete this mappings information.
- */
- found_maps = 0;
- list_for_each_entry(r_list, &dev->maplist, head) {
- if (r_list->map == map)
- found_maps++;
- }
-
- if (!found_maps) {
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- arch_phys_wc_del(map->mtrr);
- iounmap(map->handle);
- break;
- case _DRM_SHM:
- vfree(map->handle);
- break;
- case _DRM_AGP:
- case _DRM_SCATTER_GATHER:
- break;
- case _DRM_CONSISTENT:
- dma_free_coherent(dev->dev,
- map->size,
- map->handle,
- map->offset);
- break;
- }
- kfree(map);
- }
- }
- mutex_unlock(&dev->struct_mutex);
-}
-
-/*
- * \c fault method for DMA virtual memory.
- *
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Determine the page number from the page offset and get it from drm_device_dma::pagelist.
- */
-static vm_fault_t drm_vm_dma_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_device_dma *dma = dev->dma;
- unsigned long offset;
- unsigned long page_nr;
- struct page *page;
-
- if (!dma)
- return VM_FAULT_SIGBUS; /* Error */
- if (!dma->pagelist)
- return VM_FAULT_SIGBUS; /* Nothing allocated */
-
- offset = vmf->address - vma->vm_start;
- /* vm_[pg]off[set] should be 0 */
- page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */
- page = virt_to_page((void *)dma->pagelist[page_nr]);
-
- get_page(page);
- vmf->page = page;
-
- DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr);
- return 0;
-}
-
-/*
- * \c fault method for scatter-gather virtual memory.
- *
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
- */
-static vm_fault_t drm_vm_sg_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct drm_local_map *map = vma->vm_private_data;
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_sg_mem *entry = dev->sg;
- unsigned long offset;
- unsigned long map_offset;
- unsigned long page_offset;
- struct page *page;
-
- if (!entry)
- return VM_FAULT_SIGBUS; /* Error */
- if (!entry->pagelist)
- return VM_FAULT_SIGBUS; /* Nothing allocated */
-
- offset = vmf->address - vma->vm_start;
- map_offset = map->offset - (unsigned long)dev->sg->virtual;
- page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
- page = entry->pagelist[page_offset];
- get_page(page);
- vmf->page = page;
-
- return 0;
-}
-
-/** AGP virtual memory operations */
-static const struct vm_operations_struct drm_vm_ops = {
- .fault = drm_vm_fault,
- .open = drm_vm_open,
- .close = drm_vm_close,
-};
-
-/** Shared virtual memory operations */
-static const struct vm_operations_struct drm_vm_shm_ops = {
- .fault = drm_vm_shm_fault,
- .open = drm_vm_open,
- .close = drm_vm_shm_close,
-};
-
-/** DMA virtual memory operations */
-static const struct vm_operations_struct drm_vm_dma_ops = {
- .fault = drm_vm_dma_fault,
- .open = drm_vm_open,
- .close = drm_vm_close,
-};
-
-/** Scatter-gather virtual memory operations */
-static const struct vm_operations_struct drm_vm_sg_ops = {
- .fault = drm_vm_sg_fault,
- .open = drm_vm_open,
- .close = drm_vm_close,
-};
-
-static void drm_vm_open_locked(struct drm_device *dev,
- struct vm_area_struct *vma)
-{
- struct drm_vma_entry *vma_entry;
-
- DRM_DEBUG("0x%08lx,0x%08lx\n",
- vma->vm_start, vma->vm_end - vma->vm_start);
-
- vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL);
- if (vma_entry) {
- vma_entry->vma = vma;
- vma_entry->pid = current->pid;
- list_add(&vma_entry->head, &dev->vmalist);
- }
-}
-
-static void drm_vm_open(struct vm_area_struct *vma)
-{
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
-
- mutex_lock(&dev->struct_mutex);
- drm_vm_open_locked(dev, vma);
- mutex_unlock(&dev->struct_mutex);
-}
-
-static void drm_vm_close_locked(struct drm_device *dev,
- struct vm_area_struct *vma)
-{
- struct drm_vma_entry *pt, *temp;
-
- DRM_DEBUG("0x%08lx,0x%08lx\n",
- vma->vm_start, vma->vm_end - vma->vm_start);
-
- list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
- if (pt->vma == vma) {
- list_del(&pt->head);
- kfree(pt);
- break;
- }
- }
-}
-
-/*
- * \c close method for all virtual memory types.
- *
- * \param vma virtual memory area.
- *
- * Search the \p vma private data entry in drm_device::vmalist, unlink it, and
- * free it.
- */
-static void drm_vm_close(struct vm_area_struct *vma)
-{
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
-
- mutex_lock(&dev->struct_mutex);
- drm_vm_close_locked(dev, vma);
- mutex_unlock(&dev->struct_mutex);
-}
-
-/*
- * mmap DMA memory.
- *
- * \param file_priv DRM file private.
- * \param vma virtual memory area.
- * \return zero on success or a negative number on failure.
- *
- * Sets the virtual memory area operations structure to vm_dma_ops, the file
- * pointer, and calls vm_open().
- */
-static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
-{
- struct drm_file *priv = filp->private_data;
- struct drm_device *dev;
- struct drm_device_dma *dma;
- unsigned long length = vma->vm_end - vma->vm_start;
-
- dev = priv->minor->dev;
- dma = dev->dma;
- DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n",
- vma->vm_start, vma->vm_end, vma->vm_pgoff);
-
- /* Length must match exact page count */
- if (!dma || (length >> PAGE_SHIFT) != dma->page_count) {
- return -EINVAL;
- }
-
- if (!capable(CAP_SYS_ADMIN) &&
- (dma->flags & _DRM_DMA_USE_PCI_RO)) {
- vm_flags_clear(vma, VM_WRITE | VM_MAYWRITE);
-#if defined(__i386__) || defined(__x86_64__)
- pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
-#else
- /* Ye gads this is ugly. With more thought
- we could move this up higher and use
- `protection_map' instead. */
- vma->vm_page_prot =
- __pgprot(pte_val
- (pte_wrprotect
- (__pte(pgprot_val(vma->vm_page_prot)))));
-#endif
- }
-
- vma->vm_ops = &drm_vm_dma_ops;
-
- vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
-
- drm_vm_open_locked(dev, vma);
- return 0;
-}
-
-static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev)
-{
-#ifdef __alpha__
- return dev->hose->dense_mem_base;
-#else
- return 0;
-#endif
-}
-
-/*
- * mmap DMA memory.
- *
- * \param file_priv DRM file private.
- * \param vma virtual memory area.
- * \return zero on success or a negative number on failure.
- *
- * If the virtual memory area has no offset associated with it then it's a DMA
- * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist,
- * checks that the restricted flag is not set, sets the virtual memory operations
- * according to the mapping type and remaps the pages. Finally sets the file
- * pointer and calls vm_open().
- */
-static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
-{
- struct drm_file *priv = filp->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_local_map *map = NULL;
- resource_size_t offset = 0;
- struct drm_hash_item *hash;
-
- DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n",
- vma->vm_start, vma->vm_end, vma->vm_pgoff);
-
- if (!priv->authenticated)
- return -EACCES;
-
- /* We check for "dma". On Apple's UniNorth, it's valid to have
- * the AGP mapped at physical address 0
- * --BenH.
- */
- if (!vma->vm_pgoff
-#if IS_ENABLED(CONFIG_AGP)
- && (!dev->agp
- || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
-#endif
- )
- return drm_mmap_dma(filp, vma);
-
- if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) {
- DRM_ERROR("Could not find map\n");
- return -EINVAL;
- }
-
- map = drm_hash_entry(hash, struct drm_map_list, hash)->map;
- if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
- return -EPERM;
-
- /* Check for valid size. */
- if (map->size < vma->vm_end - vma->vm_start)
- return -EINVAL;
-
- if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) {
- vm_flags_clear(vma, VM_WRITE | VM_MAYWRITE);
-#if defined(__i386__) || defined(__x86_64__)
- pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
-#else
- /* Ye gads this is ugly. With more thought
- we could move this up higher and use
- `protection_map' instead. */
- vma->vm_page_prot =
- __pgprot(pte_val
- (pte_wrprotect
- (__pte(pgprot_val(vma->vm_page_prot)))));
-#endif
- }
-
- switch (map->type) {
-#if !defined(__arm__)
- case _DRM_AGP:
- if (dev->agp && dev->agp->cant_use_aperture) {
- /*
- * On some platforms we can't talk to bus dma address from the CPU, so for
- * memory of type DRM_AGP, we'll deal with sorting out the real physical
- * pages and mappings in fault()
- */
-#if defined(__powerpc__)
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-#endif
- vma->vm_ops = &drm_vm_ops;
- break;
- }
- fallthrough; /* to _DRM_FRAME_BUFFER... */
-#endif
- case _DRM_FRAME_BUFFER:
- case _DRM_REGISTERS:
- offset = drm_core_get_reg_ofs(dev);
- vma->vm_page_prot = drm_io_prot(map, vma);
- if (io_remap_pfn_range(vma, vma->vm_start,
- (map->offset + offset) >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot))
- return -EAGAIN;
- DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx,"
- " offset = 0x%llx\n",
- map->type,
- vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset));
-
- vma->vm_ops = &drm_vm_ops;
- break;
- case _DRM_CONSISTENT:
- /* Consistent memory is really like shared memory. But
- * it's allocated in a different way, so avoid fault */
- if (remap_pfn_range(vma, vma->vm_start,
- page_to_pfn(virt_to_page(map->handle)),
- vma->vm_end - vma->vm_start, vma->vm_page_prot))
- return -EAGAIN;
- vma->vm_page_prot = drm_dma_prot(map->type, vma);
- fallthrough; /* to _DRM_SHM */
- case _DRM_SHM:
- vma->vm_ops = &drm_vm_shm_ops;
- vma->vm_private_data = (void *)map;
- break;
- case _DRM_SCATTER_GATHER:
- vma->vm_ops = &drm_vm_sg_ops;
- vma->vm_private_data = (void *)map;
- vma->vm_page_prot = drm_dma_prot(map->type, vma);
- break;
- default:
- return -EINVAL; /* This should never happen. */
- }
- vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
-
- drm_vm_open_locked(dev, vma);
- return 0;
-}
-
-int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- struct drm_file *priv = filp->private_data;
- struct drm_device *dev = priv->minor->dev;
- int ret;
-
- if (drm_dev_is_unplugged(dev))
- return -ENODEV;
-
- mutex_lock(&dev->struct_mutex);
- ret = drm_mmap_locked(filp, vma);
- mutex_unlock(&dev->struct_mutex);
-
- return ret;
-}
-EXPORT_SYMBOL(drm_legacy_mmap);
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
-void drm_legacy_vma_flush(struct drm_device *dev)
-{
- struct drm_vma_entry *vma, *vma_temp;
-
- /* Clear vma list (only needed for legacy drivers) */
- list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
- list_del(&vma->head);
- kfree(vma);
- }
-}
-#endif
#include <linux/wait.h>
struct drm_file;
-struct drm_hw_lock;
-
-/*
- * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for
- * include ordering reasons.
- *
- * DO NOT USE.
- */
-struct drm_lock_data {
- struct drm_hw_lock *hw_lock;
- struct drm_file *file_priv;
- wait_queue_head_t lock_queue;
- unsigned long lock_time;
- spinlock_t spinlock;
- uint32_t kernel_waiters;
- uint32_t user_waiters;
- int idle_has_lock;
-};
/**
* struct drm_master - drm master structure
* Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex.
*/
struct idr lessee_idr;
- /* private: */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
- struct drm_lock_data lock;
-#endif
};
struct drm_master *drm_master_get(struct drm_master *master);
#include <linux/mutex.h>
#include <linux/idr.h>
-#include <drm/drm_legacy.h>
#include <drm/drm_mode_config.h>
struct drm_driver;
*
* Lock for others (not &drm_minor.master and &drm_file.is_master)
*
- * WARNING:
- * Only drivers annotated with DRIVER_LEGACY should be using this.
+ * TODO: This lock used to be the BKL of the DRM subsystem. Move the
+ * lock into i915, which is the only remaining user.
*/
struct mutex struct_mutex;
* Root directory for debugfs files.
*/
struct dentry *debugfs_root;
-
- /* Everything below here is for legacy driver, never use! */
- /* private: */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
- /* List of devices per driver for stealth attach cleanup */
- struct list_head legacy_dev_list;
-
-#ifdef __alpha__
- /** @hose: PCI hose, only used on ALPHA platforms. */
- struct pci_controller *hose;
-#endif
-
- /* AGP data */
- struct drm_agp_head *agp;
-
- /* Context handle management - linked list of context handles */
- struct list_head ctxlist;
-
- /* Context handle management - mutex for &ctxlist */
- struct mutex ctxlist_mutex;
-
- /* Context handle management */
- struct idr ctx_idr;
-
- /* Memory management - linked list of regions */
- struct list_head maplist;
-
- /* Memory management - user token hash table for maps */
- struct drm_open_hash map_hash;
-
- /* Context handle management - list of vmas (for debugging) */
- struct list_head vmalist;
-
- /* Optional pointer for DMA support */
- struct drm_device_dma *dma;
-
- /* Context swapping flag */
- __volatile__ long context_flag;
-
- /* Last current context */
- int last_context;
-
- /* Lock for &buf_use and a few other things. */
- spinlock_t buf_lock;
-
- /* Usage counter for buffers in use -- cannot alloc */
- int buf_use;
-
- /* Buffer allocation in progress */
- atomic_t buf_alloc;
-
- struct {
- int context;
- struct drm_hw_lock *lock;
- } sigdata;
-
- struct drm_local_map *agp_buffer_map;
- unsigned int agp_buffer_token;
-
- /* Scatter gather memory */
- struct drm_sg_mem *sg;
-
- /* IRQs */
- bool irq_enabled;
- int irq;
-#endif
};
#endif
* some examples.
*/
const struct file_operations *fops;
-
-#ifdef CONFIG_DRM_LEGACY
- /* Everything below here is for legacy driver, never use! */
- /* private: */
-
- int (*firstopen) (struct drm_device *);
- void (*preclose) (struct drm_device *, struct drm_file *file_priv);
- int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
- int (*dma_quiescent) (struct drm_device *);
- int (*context_dtor) (struct drm_device *dev, int context);
- irqreturn_t (*irq_handler)(int irq, void *arg);
- void (*irq_preinstall)(struct drm_device *dev);
- int (*irq_postinstall)(struct drm_device *dev);
- void (*irq_uninstall)(struct drm_device *dev);
- u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe);
- int (*enable_vblank)(struct drm_device *dev, unsigned int pipe);
- void (*disable_vblank)(struct drm_device *dev, unsigned int pipe);
- int dev_priv_size;
-#endif
};
void *__devm_drm_dev_alloc(struct device *parent,
* Per-file buffer caches used by the PRIME buffer sharing code.
*/
struct drm_prime_file_private prime;
-
- /* private: */
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
- unsigned long lock_count; /* DRI1 legacy lock count */
-#endif
};
/**
+++ /dev/null
-#ifndef __DRM_DRM_LEGACY_H__
-#define __DRM_DRM_LEGACY_H__
-/*
- * Legacy driver interfaces for the Direct Rendering Manager
- *
- * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * Copyright (c) 2009-2010, Code Aurora Forum.
- * All rights reserved.
- * Copyright © 2014 Intel Corporation
- * Daniel Vetter <daniel.vetter@ffwll.ch>
- *
- * Author: Rickard E. (Rik) Faith <faith@valinux.com>
- * Author: Gareth Hughes <gareth@valinux.com>
- *
- * 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 <linux/agp_backend.h>
-
-#include <drm/drm.h>
-#include <drm/drm_auth.h>
-
-struct drm_device;
-struct drm_driver;
-struct file;
-struct pci_driver;
-
-/*
- * Legacy Support for palateontologic DRM drivers
- *
- * If you add a new driver and it uses any of these functions or structures,
- * you're doing it terribly wrong.
- */
-
-/*
- * Hash-table Support
- */
-
-struct drm_hash_item {
- struct hlist_node head;
- unsigned long key;
-};
-
-struct drm_open_hash {
- struct hlist_head *table;
- u8 order;
-};
-
-/**
- * DMA buffer.
- */
-struct drm_buf {
- int idx; /**< Index into master buflist */
- int total; /**< Buffer size */
- int order; /**< log-base-2(total) */
- int used; /**< Amount of buffer in use (for DMA) */
- unsigned long offset; /**< Byte offset (used internally) */
- void *address; /**< Address of buffer */
- unsigned long bus_address; /**< Bus address of buffer */
- struct drm_buf *next; /**< Kernel-only: used for free list */
- __volatile__ int waiting; /**< On kernel DMA queue */
- __volatile__ int pending; /**< On hardware DMA queue */
- struct drm_file *file_priv; /**< Private of holding file descr */
- int context; /**< Kernel queue for this buffer */
- int while_locked; /**< Dispatch this buffer while locked */
- enum {
- DRM_LIST_NONE = 0,
- DRM_LIST_FREE = 1,
- DRM_LIST_WAIT = 2,
- DRM_LIST_PEND = 3,
- DRM_LIST_PRIO = 4,
- DRM_LIST_RECLAIM = 5
- } list; /**< Which list we're on */
-
- int dev_priv_size; /**< Size of buffer private storage */
- void *dev_private; /**< Per-buffer private storage */
-};
-
-typedef struct drm_dma_handle {
- dma_addr_t busaddr;
- void *vaddr;
- size_t size;
-} drm_dma_handle_t;
-
-/**
- * Buffer entry. There is one of this for each buffer size order.
- */
-struct drm_buf_entry {
- int buf_size; /**< size */
- int buf_count; /**< number of buffers */
- struct drm_buf *buflist; /**< buffer list */
- int seg_count;
- int page_order;
- struct drm_dma_handle **seglist;
-
- int low_mark; /**< Low water mark */
- int high_mark; /**< High water mark */
-};
-
-/**
- * DMA data.
- */
-struct drm_device_dma {
-
- struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
- int buf_count; /**< total number of buffers */
- struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
- int seg_count;
- int page_count; /**< number of pages */
- unsigned long *pagelist; /**< page list */
- unsigned long byte_count;
- enum {
- _DRM_DMA_USE_AGP = 0x01,
- _DRM_DMA_USE_SG = 0x02,
- _DRM_DMA_USE_FB = 0x04,
- _DRM_DMA_USE_PCI_RO = 0x08
- } flags;
-
-};
-
-/**
- * Scatter-gather memory.
- */
-struct drm_sg_mem {
- unsigned long handle;
- void *virtual;
- int pages;
- struct page **pagelist;
- dma_addr_t *busaddr;
-};
-
-/**
- * Kernel side of a mapping
- */
-struct drm_local_map {
- dma_addr_t offset; /**< Requested physical address (0 for SAREA)*/
- unsigned long size; /**< Requested physical size (bytes) */
- enum drm_map_type type; /**< Type of memory to map */
- enum drm_map_flags flags; /**< Flags */
- void *handle; /**< User-space: "Handle" to pass to mmap() */
- /**< Kernel-space: kernel-virtual address */
- int mtrr; /**< MTRR slot used */
-};
-
-typedef struct drm_local_map drm_local_map_t;
-
-/**
- * Mappings list
- */
-struct drm_map_list {
- struct list_head head; /**< list head */
- struct drm_hash_item hash;
- struct drm_local_map *map; /**< mapping */
- uint64_t user_token;
- struct drm_master *master;
-};
-
-int drm_legacy_addmap(struct drm_device *d, resource_size_t offset,
- unsigned int size, enum drm_map_type type,
- enum drm_map_flags flags, struct drm_local_map **map_p);
-struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token);
-void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
-int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
-struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev);
-int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma);
-
-int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req);
-int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req);
-
-/**
- * Test that the hardware lock is held by the caller, returning otherwise.
- *
- * \param dev DRM device.
- * \param filp file pointer of the caller.
- */
-#define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
-do { \
- if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
- _file_priv->master->lock.file_priv != _file_priv) { \
- DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
- __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
- _file_priv->master->lock.file_priv, _file_priv); \
- return -EINVAL; \
- } \
-} while (0)
-
-void drm_legacy_idlelock_take(struct drm_lock_data *lock);
-void drm_legacy_idlelock_release(struct drm_lock_data *lock);
-
-/* drm_irq.c */
-int drm_legacy_irq_uninstall(struct drm_device *dev);
-
-/* drm_pci.c */
-
-#ifdef CONFIG_PCI
-
-int drm_legacy_pci_init(const struct drm_driver *driver,
- struct pci_driver *pdriver);
-void drm_legacy_pci_exit(const struct drm_driver *driver,
- struct pci_driver *pdriver);
-
-#else
-
-static inline struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev,
- size_t size, size_t align)
-{
- return NULL;
-}
-
-static inline void drm_pci_free(struct drm_device *dev,
- struct drm_dma_handle *dmah)
-{
-}
-
-static inline int drm_legacy_pci_init(const struct drm_driver *driver,
- struct pci_driver *pdriver)
-{
- return -EINVAL;
-}
-
-static inline void drm_legacy_pci_exit(const struct drm_driver *driver,
- struct pci_driver *pdriver)
-{
-}
-
-#endif
-
-/*
- * AGP Support
- */
-
-struct drm_agp_head {
- struct agp_kern_info agp_info;
- struct list_head memory;
- unsigned long mode;
- struct agp_bridge_data *bridge;
- int enabled;
- int acquired;
- unsigned long base;
- int agp_mtrr;
- int cant_use_aperture;
- unsigned long page_mask;
-};
-
-#if IS_ENABLED(CONFIG_DRM_LEGACY) && IS_ENABLED(CONFIG_AGP)
-struct drm_agp_head *drm_legacy_agp_init(struct drm_device *dev);
-int drm_legacy_agp_acquire(struct drm_device *dev);
-int drm_legacy_agp_release(struct drm_device *dev);
-int drm_legacy_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
-int drm_legacy_agp_info(struct drm_device *dev, struct drm_agp_info *info);
-int drm_legacy_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
-int drm_legacy_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
-int drm_legacy_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
-int drm_legacy_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
-#else
-static inline struct drm_agp_head *drm_legacy_agp_init(struct drm_device *dev)
-{
- return NULL;
-}
-
-static inline int drm_legacy_agp_acquire(struct drm_device *dev)
-{
- return -ENODEV;
-}
-
-static inline int drm_legacy_agp_release(struct drm_device *dev)
-{
- return -ENODEV;
-}
-
-static inline int drm_legacy_agp_enable(struct drm_device *dev,
- struct drm_agp_mode mode)
-{
- return -ENODEV;
-}
-
-static inline int drm_legacy_agp_info(struct drm_device *dev,
- struct drm_agp_info *info)
-{
- return -ENODEV;
-}
-
-static inline int drm_legacy_agp_alloc(struct drm_device *dev,
- struct drm_agp_buffer *request)
-{
- return -ENODEV;
-}
-
-static inline int drm_legacy_agp_free(struct drm_device *dev,
- struct drm_agp_buffer *request)
-{
- return -ENODEV;
-}
-
-static inline int drm_legacy_agp_unbind(struct drm_device *dev,
- struct drm_agp_binding *request)
-{
- return -ENODEV;
-}
-
-static inline int drm_legacy_agp_bind(struct drm_device *dev,
- struct drm_agp_binding *request)
-{
- return -ENODEV;
-}
-#endif
-
-/* drm_memory.c */
-void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
-void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
-void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
-
-#endif /* __DRM_DRM_LEGACY_H__ */
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