--- old/usr/src/uts/common/io/drm/drm_gem.c	Sun May 28 15:47:11 2017
+++ /dev/null	Sun May 28 15:44:56 2017
@@ -1,698 +0,0 @@
-/*
- * Copyright (c) 2009, Intel Corporation.
- * 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
- * THE AUTHORS OR COPYRIGHT HOLDERS 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.
- *
- * Authors:
- *    Eric Anholt <eric@anholt.net>
- *
- */
-
-/*
- * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-#include <vm/anon.h>
-#include <vm/seg_kmem.h>
-#include <vm/seg_kp.h>
-#include <vm/seg_map.h>
-#include <sys/fcntl.h>
-#include <sys/vnode.h>
-#include <sys/file.h>
-#include <sys/bitmap.h>
-#include <sys/ddi.h>
-#include <sys/sunddi.h>
-#include <sys/gfx_private.h>
-#include "drmP.h"
-#include "drm.h"
-
-/*
- * @file drm_gem.c
- *
- * This file provides some of the base ioctls and library routines for
- * the graphics memory manager implemented by each device driver.
- *
- * Because various devices have different requirements in terms of
- * synchronization and migration strategies, implementing that is left up to
- * the driver, and all that the general API provides should be generic --
- * allocating objects, reading/writing data with the cpu, freeing objects.
- * Even there, platform-dependent optimizations for reading/writing data with
- * the CPU mean we'll likely hook those out to driver-specific calls.  However,
- * the DRI2 implementation wants to have at least allocate/mmap be generic.
- *
- * The goal was to have swap-backed object allocation managed through
- * struct file.  However, file descriptors as handles to a struct file have
- * two major failings:
- * - Process limits prevent more than 1024 or so being used at a time by
- *   default.
- * - Inability to allocate high fds will aggravate the X Server's select()
- *   handling, and likely that of many GL client applications as well.
- *
- * This led to a plan of using our own integer IDs(called handles, following
- * DRM terminology) to mimic fds, and implement the fd syscalls we need as
- * ioctls.  The objects themselves will still include the struct file so
- * that we can transition to fds if the required kernel infrastructure shows
- * up at a later date, and as our interface with shmfs for memory allocation.
- */
-
-void
-idr_list_init(struct idr_list  *head)
-{
-	struct idr_list  *entry;
-	/* HASH for accelerate */
-	entry = kmem_zalloc(DRM_GEM_OBJIDR_HASHNODE
-	    * sizeof (struct idr_list), KM_SLEEP);
-	head->next = entry;
-	for (int i = 0; i < DRM_GEM_OBJIDR_HASHNODE; i++) {
-		INIT_LIST_HEAD(&entry[i]);
-	}
-}
-
-int
-idr_list_get_new_above(struct idr_list	*head,
-			struct drm_gem_object *obj,
-			int *handlep)
-{
-	struct idr_list  *entry;
-	int key;
-	entry = kmem_zalloc(sizeof (*entry), KM_SLEEP);
-	key = obj->name % DRM_GEM_OBJIDR_HASHNODE;
-	list_add(entry, &head->next[key], NULL);
-	entry->obj = obj;
-	entry->handle = obj->name;
-	*handlep = obj->name;
-	return (0);
-}
-
-struct drm_gem_object *
-idr_list_find(struct idr_list  *head,
-		uint32_t	name)
-{
-	struct idr_list  *entry;
-	int key;
-	key = name % DRM_GEM_OBJIDR_HASHNODE;
-
-	list_for_each(entry, &head->next[key]) {
-		if (entry->handle == name)
-			return (entry->obj);
-	}
-	return (NULL);
-}
-
-int
-idr_list_remove(struct idr_list  *head,
-		uint32_t	name)
-{
-	struct idr_list  *entry, *temp;
-	int key;
-	key = name % DRM_GEM_OBJIDR_HASHNODE;
-	list_for_each_safe(entry, temp, &head->next[key]) {
-		if (entry->handle == name) {
-			list_del(entry);
-			kmem_free(entry, sizeof (*entry));
-			return (0);
-		}
-	}
-	DRM_ERROR("Failed to remove the object %d", name);
-	return (-1);
-}
-
-void
-idr_list_free(struct idr_list  *head)
-{
-	struct idr_list  *entry, *temp;
-	for (int key = 0; key < DRM_GEM_OBJIDR_HASHNODE; key++) {
-		list_for_each_safe(entry, temp, &head->next[key]) {
-			list_del(entry);
-			kmem_free(entry, sizeof (*entry));
-		}
-	}
-	kmem_free(head->next,
-	    DRM_GEM_OBJIDR_HASHNODE * sizeof (struct idr_list));
-	head->next = NULL;
-}
-
-int
-idr_list_empty(struct idr_list  *head)
-{
-	int empty;
-	for (int key = 0; key < DRM_GEM_OBJIDR_HASHNODE; key++) {
-		empty = list_empty(&(head)->next[key]);
-		if (!empty)
-			return (empty);
-	}
-	return (1);
-}
-
-static	uint32_t	shfile_name = 0;
-#define	SHFILE_NAME_MAX	0xffffffff
-
-/*
- * will be set to 1 for 32 bit x86 systems only, in startup.c
- */
-extern int	segkp_fromheap;
-extern ulong_t *segkp_bitmap;
-
-void
-drm_gem_object_reference(struct drm_gem_object *obj)
-{
-	atomic_inc(&obj->refcount);
-}
-
-void
-drm_gem_object_unreference(struct drm_gem_object *obj)
-{
-	if (obj == NULL)
-		return;
-
-	atomic_sub(1, &obj->refcount);
-	if (obj->refcount == 0)
-		drm_gem_object_free(obj);
-}
-
-void
-drm_gem_object_handle_reference(struct drm_gem_object *obj)
-{
-	drm_gem_object_reference(obj);
-	atomic_inc(&obj->handlecount);
-}
-
-void
-drm_gem_object_handle_unreference(struct drm_gem_object *obj)
-{
-	if (obj == NULL)
-		return;
-
-	/*
-	 * Must bump handle count first as this may be the last
-	 * ref, in which case the object would disappear before we
-	 * checked for a name
-	 */
-	atomic_sub(1, &obj->handlecount);
-	if (obj->handlecount == 0)
-		drm_gem_object_handle_free(obj);
-	drm_gem_object_unreference(obj);
-}
-
-/*
- * Initialize the GEM device fields
- */
-
-int
-drm_gem_init(struct drm_device *dev)
-{
-	mutex_init(&dev->object_name_lock, NULL, MUTEX_DRIVER, NULL);
-	idr_list_init(&dev->object_name_idr);
-
-	atomic_set(&dev->object_count, 0);
-	atomic_set(&dev->object_memory, 0);
-	atomic_set(&dev->pin_count, 0);
-	atomic_set(&dev->pin_memory, 0);
-	atomic_set(&dev->gtt_count, 0);
-	atomic_set(&dev->gtt_memory, 0);
-	return (0);
-}
-
-/*
- * Allocate a GEM object of the specified size with shmfs backing store
- */
-struct drm_gem_object *
-drm_gem_object_alloc(struct drm_device *dev, size_t size)
-{
-	static ddi_dma_attr_t dma_attr = {
-		DMA_ATTR_V0,
-		0U,				/* dma_attr_addr_lo */
-		0xffffffffU,			/* dma_attr_addr_hi */
-		0xffffffffU,			/* dma_attr_count_max */
-		4096,				/* dma_attr_align */
-		0x1fffU,			/* dma_attr_burstsizes */
-		1,				/* dma_attr_minxfer */
-		0xffffffffU,			/* dma_attr_maxxfer */
-		0xffffffffU,			/* dma_attr_seg */
-		1,				/* dma_attr_sgllen, variable */
-		4,				/* dma_attr_granular */
-		0				/* dma_attr_flags */
-	};
-	static ddi_device_acc_attr_t acc_attr = {
-		DDI_DEVICE_ATTR_V0,
-		DDI_NEVERSWAP_ACC,
-		DDI_MERGING_OK_ACC
-	};
-	struct drm_gem_object *obj;
-	ddi_dma_cookie_t cookie;
-	uint_t cookie_cnt;
-	drm_local_map_t *map;
-
-	pgcnt_t real_pgcnt, pgcnt = btopr(size);
-	uint32_t paddr, cookie_end;
-	int i, n;
-
-	obj = kmem_zalloc(sizeof (struct drm_gem_object), KM_NOSLEEP);
-	if (obj == NULL)
-		return (NULL);
-
-	obj->dev = dev;
-	obj->flink = 0;
-	obj->size = size;
-
-	if (shfile_name == SHFILE_NAME_MAX) {
-		DRM_ERROR("No name space for object");
-		goto err1;
-	} else {
-		obj->name = ++shfile_name;
-	}
-
-	dma_attr.dma_attr_sgllen = (int)pgcnt;
-
-	if (ddi_dma_alloc_handle(dev->dip, &dma_attr,
-	    DDI_DMA_DONTWAIT, NULL, &obj->dma_hdl)) {
-		DRM_ERROR("drm_gem_object_alloc: "
-		    "ddi_dma_alloc_handle failed");
-		goto err1;
-	}
-	if (ddi_dma_mem_alloc(obj->dma_hdl, ptob(pgcnt), &acc_attr,
-	    IOMEM_DATA_UC_WR_COMBINE, DDI_DMA_DONTWAIT, NULL,
-	    &obj->kaddr, &obj->real_size, &obj->acc_hdl)) {
-		DRM_ERROR("drm_gem_object_alloc: "
-		    "ddi_dma_mem_alloc failed");
-		goto err2;
-	}
-	if (ddi_dma_addr_bind_handle(obj->dma_hdl, NULL,
-	    obj->kaddr, obj->real_size, DDI_DMA_RDWR,
-	    DDI_DMA_DONTWAIT, NULL, &cookie, &cookie_cnt)
-	    != DDI_DMA_MAPPED) {
-		DRM_ERROR("drm_gem_object_alloc: "
-		    "ddi_dma_addr_bind_handle failed");
-		goto err3;
-	}
-
-	real_pgcnt = btopr(obj->real_size);
-
-	obj->pfnarray = kmem_zalloc(real_pgcnt * sizeof (pfn_t), KM_NOSLEEP);
-	if (obj->pfnarray == NULL) {
-		goto err4;
-	}
-	for (n = 0, i = 1; ; i++) {
-		for (paddr = cookie.dmac_address,
-		    cookie_end = cookie.dmac_address + cookie.dmac_size;
-		    paddr < cookie_end;
-		    paddr += PAGESIZE) {
-			obj->pfnarray[n++] = btop(paddr);
-			if (n >= real_pgcnt)
-				goto addmap;
-		}
-		if (i >= cookie_cnt)
-			break;
-		ddi_dma_nextcookie(obj->dma_hdl, &cookie);
-	}
-
-addmap:
-	map = drm_alloc(sizeof (struct drm_local_map), DRM_MEM_MAPS);
-	if (map == NULL) {
-		goto err5;
-	}
-
-	map->handle = obj;
-	map->offset = (uintptr_t)map->handle;
-	map->offset &= 0xffffffffUL;
-	map->dev_addr = map->handle;
-	map->size = obj->real_size;
-	map->type = _DRM_TTM;
-	map->flags = _DRM_WRITE_COMBINING | _DRM_REMOVABLE;
-	map->drm_umem_cookie =
-	    gfxp_umem_cookie_init(obj->kaddr, obj->real_size);
-	if (map->drm_umem_cookie == NULL) {
-		goto err6;
-	}
-
-	obj->map = map;
-
-	atomic_set(&obj->refcount, 1);
-	atomic_set(&obj->handlecount, 1);
-	if (dev->driver->gem_init_object != NULL &&
-	    dev->driver->gem_init_object(obj) != 0) {
-		goto err7;
-	}
-	atomic_inc(&dev->object_count);
-	atomic_add(obj->size, &dev->object_memory);
-
-	return (obj);
-
-err7:
-	gfxp_umem_cookie_destroy(map->drm_umem_cookie);
-err6:
-	drm_free(map, sizeof (struct drm_local_map), DRM_MEM_MAPS);
-err5:
-	kmem_free(obj->pfnarray, real_pgcnt * sizeof (pfn_t));
-err4:
-	(void) ddi_dma_unbind_handle(obj->dma_hdl);
-err3:
-	ddi_dma_mem_free(&obj->acc_hdl);
-err2:
-	ddi_dma_free_handle(&obj->dma_hdl);
-err1:
-	kmem_free(obj, sizeof (struct drm_gem_object));
-
-	return (NULL);
-}
-
-/*
- * Removes the mapping from handle to filp for this object.
- */
-static int
-drm_gem_handle_delete(struct drm_file *filp, int handle)
-{
-	struct drm_device *dev;
-	struct drm_gem_object *obj;
-	int err;
-	/*
-	 * This is gross. The idr system doesn't let us try a delete and
-	 * return an error code.  It just spews if you fail at deleting.
-	 * So, we have to grab a lock around finding the object and then
-	 * doing the delete on it and dropping the refcount, or the user
-	 * could race us to double-decrement the refcount and cause a
-	 * use-after-free later.  Given the frequency of our handle lookups,
-	 * we may want to use ida for number allocation and a hash table
-	 * for the pointers, anyway.
-	 */
-	spin_lock(&filp->table_lock);
-
-	/* Check if we currently have a reference on the object */
-	obj = idr_list_find(&filp->object_idr, handle);
-	if (obj == NULL) {
-		spin_unlock(&filp->table_lock);
-		DRM_ERROR("obj %d is not in tne list, failed to close", handle);
-		return (EINVAL);
-	}
-	dev = obj->dev;
-
-	/* Release reference and decrement refcount. */
-	err = idr_list_remove(&filp->object_idr, handle);
-	if (err == -1)
-		DRM_ERROR("%s", __func__);
-
-	spin_unlock(&filp->table_lock);
-
-	spin_lock(&dev->struct_mutex);
-	drm_gem_object_handle_unreference(obj);
-	spin_unlock(&dev->struct_mutex);
-	return (0);
-}
-
-/*
- * Create a handle for this object. This adds a handle reference
- * to the object, which includes a regular reference count. Callers
- * will likely want to dereference the object afterwards.
- */
-int
-drm_gem_handle_create(struct drm_file *file_priv,
-		    struct drm_gem_object *obj,
-		    int *handlep)
-{
-	int	ret;
-
-	/*
-	 * Get the user-visible handle using idr.
-	 */
-again:
-	/* ensure there is space available to allocate a handle */
-
-	/* do the allocation under our spinlock */
-	spin_lock(&file_priv->table_lock);
-	ret = idr_list_get_new_above(&file_priv->object_idr, obj, handlep);
-	spin_unlock(&file_priv->table_lock);
-	if (ret == -EAGAIN)
-		goto again;
-
-	if (ret != 0) {
-		DRM_ERROR("Failed to create handle");
-		return (ret);
-	}
-
-	drm_gem_object_handle_reference(obj);
-	return (0);
-}
-
-/* Returns a reference to the object named by the handle. */
-struct drm_gem_object *
-drm_gem_object_lookup(struct drm_file *filp,
-			    int handle)
-{
-	struct drm_gem_object *obj;
-
-	spin_lock(&filp->table_lock);
-
-	/* Check if we currently have a reference on the object */
-	obj = idr_list_find(&filp->object_idr, handle);
-		if (obj == NULL) {
-			spin_unlock(&filp->table_lock);
-			DRM_ERROR("object_lookup failed, handle %d", handle);
-			return (NULL);
-		}
-
-	drm_gem_object_reference(obj);
-
-	spin_unlock(&filp->table_lock);
-
-	return (obj);
-}
-
-/*
- * Releases the handle to an mm object.
- */
-/*ARGSUSED*/
-int
-drm_gem_close_ioctl(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	struct drm_gem_close args;
-	int ret;
-
-	if (!(dev->driver->use_gem == 1))
-		return (ENODEV);
-
-	DRM_COPYFROM_WITH_RETURN(&args,
-	    (void *)data, sizeof (args));
-
-	ret = drm_gem_handle_delete(fpriv, args.handle);
-
-	return (ret);
-}
-
-/*
- * Create a global name for an object, returning the name.
- *
- * Note that the name does not hold a reference; when the object
- * is freed, the name goes away.
- */
-/*ARGSUSED*/
-int
-drm_gem_flink_ioctl(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	struct drm_gem_flink args;
-	struct drm_gem_object *obj;
-	int ret, handle;
-
-	if (!(dev->driver->use_gem == 1))
-		return (ENODEV);
-
-	DRM_COPYFROM_WITH_RETURN(&args,
-	    (void *)data, sizeof (args));
-	obj = drm_gem_object_lookup(fpriv, args.handle);
-	if (obj == NULL)
-		return (EINVAL);
-	handle = args.handle;
-	spin_lock(&dev->object_name_lock);
-	if (!obj->flink) {
-		/* only creat a node in object_name_idr, no update anything */
-		ret = idr_list_get_new_above(&dev->object_name_idr,
-		    obj, &handle);
-		obj->flink = obj->name;
-		/* Allocate a reference for the name table.  */
-		drm_gem_object_reference(obj);
-	}
-	/*
-	 * Leave the reference from the lookup around as the
-	 * name table now holds one
-	 */
-	args.name = obj->name;
-
-	spin_unlock(&dev->object_name_lock);
-	ret = DRM_COPY_TO_USER((void *) data, &args, sizeof (args));
-	if (ret != 0)
-		DRM_ERROR(" gem flink error! %d", ret);
-
-	spin_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(obj);
-	spin_unlock(&dev->struct_mutex);
-
-	return (ret);
-}
-
-/*
- * Open an object using the global name, returning a handle and the size.
- *
- * This handle (of course) holds a reference to the object, so the object
- * will not go away until the handle is deleted.
- */
-/*ARGSUSED*/
-int
-drm_gem_open_ioctl(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	struct drm_gem_open args;
-	struct drm_gem_object *obj;
-	int ret;
-	int handle;
-
-	if (!(dev->driver->use_gem == 1)) {
-		DRM_ERROR("Not support GEM");
-		return (ENODEV);
-	}
-	DRM_COPYFROM_WITH_RETURN(&args,
-	    (void *) data, sizeof (args));
-
-	spin_lock(&dev->object_name_lock);
-
-	obj = idr_list_find(&dev->object_name_idr, args.name);
-
-	if (obj)
-		drm_gem_object_reference(obj);
-	spin_unlock(&dev->object_name_lock);
-	if (!obj) {
-		DRM_ERROR("Can't find the obj %d", args.name);
-		return (ENOENT);
-	}
-
-	ret = drm_gem_handle_create(fpriv, obj, &handle);
-	spin_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(obj);
-	spin_unlock(&dev->struct_mutex);
-
-	args.handle = args.name;
-	args.size = obj->size;
-
-	ret = DRM_COPY_TO_USER((void *) data, &args, sizeof (args));
-	if (ret != 0)
-		DRM_ERROR(" gem open error! %d", ret);
-	return (ret);
-}
-
-/*
- * Called at device open time, sets up the structure for handling refcounting
- * of mm objects.
- */
-void
-drm_gem_open(struct drm_file *file_private)
-{
-	idr_list_init(&file_private->object_idr);
-	mutex_init(&file_private->table_lock, NULL, MUTEX_DRIVER, NULL);
-}
-
-/*
- * Called at device close to release the file's
- * handle references on objects.
- */
-static void
-drm_gem_object_release_handle(struct drm_gem_object *obj)
-{
-	drm_gem_object_handle_unreference(obj);
-}
-
-/*
- * Called at close time when the filp is going away.
- *
- * Releases any remaining references on objects by this filp.
- */
-void
-drm_gem_release(struct drm_device *dev, struct drm_file *file_private)
-{
-	struct idr_list  *entry;
-	spin_lock(&dev->struct_mutex);
-
-	idr_list_for_each(entry, &file_private->object_idr)
-	    drm_gem_object_release_handle(entry->obj);
-
-	idr_list_free(&file_private->object_idr);
-	spin_unlock(&dev->struct_mutex);
-
-}
-
-/*
- * Called after the last reference to the object has been lost.
- *
- * Frees the object
- */
-void
-drm_gem_object_free(struct drm_gem_object *obj)
-{
-	struct drm_device *dev = obj->dev;
-	struct drm_local_map *map = obj->map;
-
-	if (dev->driver->gem_free_object != NULL)
-		dev->driver->gem_free_object(obj);
-
-	gfxp_umem_cookie_destroy(map->drm_umem_cookie);
-	drm_free(map, sizeof (struct drm_local_map), DRM_MEM_MAPS);
-
-	kmem_free(obj->pfnarray, btopr(obj->real_size) * sizeof (pfn_t));
-
-	(void) ddi_dma_unbind_handle(obj->dma_hdl);
-	ddi_dma_mem_free(&obj->acc_hdl);
-	ddi_dma_free_handle(&obj->dma_hdl);
-
-	atomic_dec(&dev->object_count);
-	atomic_sub(obj->size, &dev->object_memory);
-	kmem_free(obj, sizeof (struct drm_gem_object));
-}
-
-/*
- * Called after the last handle to the object has been closed
- *
- * Removes any name for the object. Note that this must be
- * called before drm_gem_object_free or we'll be touching
- * freed memory
- */
-void
-drm_gem_object_handle_free(struct drm_gem_object *obj)
-{
-	int err;
-	struct drm_device *dev = obj->dev;
-	/* Remove any name for this object */
-	spin_lock(&dev->object_name_lock);
-	if (obj->flink) {
-		err = idr_list_remove(&dev->object_name_idr, obj->name);
-		if (err == -1)
-			DRM_ERROR("%s", __func__);
-		obj->flink = 0;
-		spin_unlock(&dev->object_name_lock);
-		/*
-		 * The object name held a reference to this object, drop
-		 * that now.
-		 */
-		drm_gem_object_unreference(obj);
-	} else
-
-		spin_unlock(&dev->object_name_lock);
-
-}
