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-rw-r--r--drivers/gpu/drm/drm_context.c513
1 files changed, 0 insertions, 513 deletions
diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
deleted file mode 100644
index a0fc779e5e..0000000000
--- a/drivers/gpu/drm/drm_context.c
+++ /dev/null
@@ -1,513 +0,0 @@
-/*
- * 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;
-}
-
-/*@}*/