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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/ttm
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/ttm')
-rw-r--r--kernel/drivers/gpu/drm/ttm/Makefile10
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_agp_backend.c152
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_bo.c1730
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_bo_manager.c157
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_bo_util.c695
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_bo_vm.c364
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_execbuf_util.c214
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_lock.c302
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_memory.c602
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_module.c102
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_object.c765
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_page_alloc.c940
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c1158
-rw-r--r--kernel/drivers/gpu/drm/ttm/ttm_tt.c402
14 files changed, 7593 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/ttm/Makefile b/kernel/drivers/gpu/drm/ttm/Makefile
new file mode 100644
index 000000000..b433b9f04
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/Makefile
@@ -0,0 +1,10 @@
+#
+# Makefile for the drm device driver. This driver provides support for the
+
+ccflags-y := -Iinclude/drm
+ttm-y := ttm_agp_backend.o ttm_memory.o ttm_tt.o ttm_bo.o \
+ ttm_bo_util.o ttm_bo_vm.o ttm_module.o \
+ ttm_object.o ttm_lock.o ttm_execbuf_util.o ttm_page_alloc.o \
+ ttm_bo_manager.o ttm_page_alloc_dma.o
+
+obj-$(CONFIG_DRM_TTM) += ttm.o
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_agp_backend.c b/kernel/drivers/gpu/drm/ttm/ttm_agp_backend.c
new file mode 100644
index 000000000..764be3639
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -0,0 +1,152 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ * Keith Packard.
+ */
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <drm/ttm/ttm_module.h>
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_page_alloc.h>
+#ifdef TTM_HAS_AGP
+#include <drm/ttm/ttm_placement.h>
+#include <linux/agp_backend.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <asm/agp.h>
+
+struct ttm_agp_backend {
+ struct ttm_tt ttm;
+ struct agp_memory *mem;
+ struct agp_bridge_data *bridge;
+};
+
+static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
+{
+ struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
+ struct drm_mm_node *node = bo_mem->mm_node;
+ struct agp_memory *mem;
+ int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
+ unsigned i;
+
+ mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
+ if (unlikely(mem == NULL))
+ return -ENOMEM;
+
+ mem->page_count = 0;
+ for (i = 0; i < ttm->num_pages; i++) {
+ struct page *page = ttm->pages[i];
+
+ if (!page)
+ page = ttm->dummy_read_page;
+
+ mem->pages[mem->page_count++] = page;
+ }
+ agp_be->mem = mem;
+
+ mem->is_flushed = 1;
+ mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
+
+ ret = agp_bind_memory(mem, node->start);
+ if (ret)
+ pr_err("AGP Bind memory failed\n");
+
+ return ret;
+}
+
+static int ttm_agp_unbind(struct ttm_tt *ttm)
+{
+ struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
+
+ if (agp_be->mem) {
+ if (agp_be->mem->is_bound)
+ return agp_unbind_memory(agp_be->mem);
+ agp_free_memory(agp_be->mem);
+ agp_be->mem = NULL;
+ }
+ return 0;
+}
+
+static void ttm_agp_destroy(struct ttm_tt *ttm)
+{
+ struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
+
+ if (agp_be->mem)
+ ttm_agp_unbind(ttm);
+ ttm_tt_fini(ttm);
+ kfree(agp_be);
+}
+
+static struct ttm_backend_func ttm_agp_func = {
+ .bind = ttm_agp_bind,
+ .unbind = ttm_agp_unbind,
+ .destroy = ttm_agp_destroy,
+};
+
+struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
+ struct agp_bridge_data *bridge,
+ unsigned long size, uint32_t page_flags,
+ struct page *dummy_read_page)
+{
+ struct ttm_agp_backend *agp_be;
+
+ agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
+ if (!agp_be)
+ return NULL;
+
+ agp_be->mem = NULL;
+ agp_be->bridge = bridge;
+ agp_be->ttm.func = &ttm_agp_func;
+
+ if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
+ kfree(agp_be);
+ return NULL;
+ }
+
+ return &agp_be->ttm;
+}
+EXPORT_SYMBOL(ttm_agp_tt_create);
+
+int ttm_agp_tt_populate(struct ttm_tt *ttm)
+{
+ if (ttm->state != tt_unpopulated)
+ return 0;
+
+ return ttm_pool_populate(ttm);
+}
+EXPORT_SYMBOL(ttm_agp_tt_populate);
+
+void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
+{
+ ttm_pool_unpopulate(ttm);
+}
+EXPORT_SYMBOL(ttm_agp_tt_unpopulate);
+
+#endif
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_bo.c b/kernel/drivers/gpu/drm/ttm/ttm_bo.c
new file mode 100644
index 000000000..8d9b7de25
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_bo.c
@@ -0,0 +1,1730 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <drm/ttm/ttm_module.h>
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_placement.h>
+#include <linux/jiffies.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/file.h>
+#include <linux/module.h>
+#include <linux/atomic.h>
+#include <linux/reservation.h>
+
+#define TTM_ASSERT_LOCKED(param)
+#define TTM_DEBUG(fmt, arg...)
+#define TTM_BO_HASH_ORDER 13
+
+static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
+static void ttm_bo_global_kobj_release(struct kobject *kobj);
+
+static struct attribute ttm_bo_count = {
+ .name = "bo_count",
+ .mode = S_IRUGO
+};
+
+static inline int ttm_mem_type_from_place(const struct ttm_place *place,
+ uint32_t *mem_type)
+{
+ int i;
+
+ for (i = 0; i <= TTM_PL_PRIV5; i++)
+ if (place->flags & (1 << i)) {
+ *mem_type = i;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+
+ pr_err(" has_type: %d\n", man->has_type);
+ pr_err(" use_type: %d\n", man->use_type);
+ pr_err(" flags: 0x%08X\n", man->flags);
+ pr_err(" gpu_offset: 0x%08llX\n", man->gpu_offset);
+ pr_err(" size: %llu\n", man->size);
+ pr_err(" available_caching: 0x%08X\n", man->available_caching);
+ pr_err(" default_caching: 0x%08X\n", man->default_caching);
+ if (mem_type != TTM_PL_SYSTEM)
+ (*man->func->debug)(man, TTM_PFX);
+}
+
+static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement)
+{
+ int i, ret, mem_type;
+
+ pr_err("No space for %p (%lu pages, %luK, %luM)\n",
+ bo, bo->mem.num_pages, bo->mem.size >> 10,
+ bo->mem.size >> 20);
+ for (i = 0; i < placement->num_placement; i++) {
+ ret = ttm_mem_type_from_place(&placement->placement[i],
+ &mem_type);
+ if (ret)
+ return;
+ pr_err(" placement[%d]=0x%08X (%d)\n",
+ i, placement->placement[i].flags, mem_type);
+ ttm_mem_type_debug(bo->bdev, mem_type);
+ }
+}
+
+static ssize_t ttm_bo_global_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buffer)
+{
+ struct ttm_bo_global *glob =
+ container_of(kobj, struct ttm_bo_global, kobj);
+
+ return snprintf(buffer, PAGE_SIZE, "%lu\n",
+ (unsigned long) atomic_read(&glob->bo_count));
+}
+
+static struct attribute *ttm_bo_global_attrs[] = {
+ &ttm_bo_count,
+ NULL
+};
+
+static const struct sysfs_ops ttm_bo_global_ops = {
+ .show = &ttm_bo_global_show
+};
+
+static struct kobj_type ttm_bo_glob_kobj_type = {
+ .release = &ttm_bo_global_kobj_release,
+ .sysfs_ops = &ttm_bo_global_ops,
+ .default_attrs = ttm_bo_global_attrs
+};
+
+
+static inline uint32_t ttm_bo_type_flags(unsigned type)
+{
+ return 1 << (type);
+}
+
+static void ttm_bo_release_list(struct kref *list_kref)
+{
+ struct ttm_buffer_object *bo =
+ container_of(list_kref, struct ttm_buffer_object, list_kref);
+ struct ttm_bo_device *bdev = bo->bdev;
+ size_t acc_size = bo->acc_size;
+
+ BUG_ON(atomic_read(&bo->list_kref.refcount));
+ BUG_ON(atomic_read(&bo->kref.refcount));
+ BUG_ON(atomic_read(&bo->cpu_writers));
+ BUG_ON(bo->mem.mm_node != NULL);
+ BUG_ON(!list_empty(&bo->lru));
+ BUG_ON(!list_empty(&bo->ddestroy));
+
+ if (bo->ttm)
+ ttm_tt_destroy(bo->ttm);
+ atomic_dec(&bo->glob->bo_count);
+ if (bo->resv == &bo->ttm_resv)
+ reservation_object_fini(&bo->ttm_resv);
+ mutex_destroy(&bo->wu_mutex);
+ if (bo->destroy)
+ bo->destroy(bo);
+ else {
+ kfree(bo);
+ }
+ ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
+}
+
+void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man;
+
+ lockdep_assert_held(&bo->resv->lock.base);
+
+ if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
+
+ BUG_ON(!list_empty(&bo->lru));
+
+ man = &bdev->man[bo->mem.mem_type];
+ list_add_tail(&bo->lru, &man->lru);
+ kref_get(&bo->list_kref);
+
+ if (bo->ttm != NULL) {
+ list_add_tail(&bo->swap, &bo->glob->swap_lru);
+ kref_get(&bo->list_kref);
+ }
+ }
+}
+EXPORT_SYMBOL(ttm_bo_add_to_lru);
+
+int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
+{
+ int put_count = 0;
+
+ if (!list_empty(&bo->swap)) {
+ list_del_init(&bo->swap);
+ ++put_count;
+ }
+ if (!list_empty(&bo->lru)) {
+ list_del_init(&bo->lru);
+ ++put_count;
+ }
+
+ /*
+ * TODO: Add a driver hook to delete from
+ * driver-specific LRU's here.
+ */
+
+ return put_count;
+}
+
+static void ttm_bo_ref_bug(struct kref *list_kref)
+{
+ BUG();
+}
+
+void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
+ bool never_free)
+{
+ kref_sub(&bo->list_kref, count,
+ (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list);
+}
+
+void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
+{
+ int put_count;
+
+ spin_lock(&bo->glob->lru_lock);
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&bo->glob->lru_lock);
+ ttm_bo_list_ref_sub(bo, put_count, true);
+}
+EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
+
+/*
+ * Call bo->mutex locked.
+ */
+static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
+ int ret = 0;
+ uint32_t page_flags = 0;
+
+ TTM_ASSERT_LOCKED(&bo->mutex);
+ bo->ttm = NULL;
+
+ if (bdev->need_dma32)
+ page_flags |= TTM_PAGE_FLAG_DMA32;
+
+ switch (bo->type) {
+ case ttm_bo_type_device:
+ if (zero_alloc)
+ page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+ case ttm_bo_type_kernel:
+ bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
+ page_flags, glob->dummy_read_page);
+ if (unlikely(bo->ttm == NULL))
+ ret = -ENOMEM;
+ break;
+ case ttm_bo_type_sg:
+ bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
+ page_flags | TTM_PAGE_FLAG_SG,
+ glob->dummy_read_page);
+ if (unlikely(bo->ttm == NULL)) {
+ ret = -ENOMEM;
+ break;
+ }
+ bo->ttm->sg = bo->sg;
+ break;
+ default:
+ pr_err("Illegal buffer object type\n");
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
+ struct ttm_mem_reg *mem,
+ bool evict, bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
+ bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
+ struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
+ struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
+ int ret = 0;
+
+ if (old_is_pci || new_is_pci ||
+ ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
+ ret = ttm_mem_io_lock(old_man, true);
+ if (unlikely(ret != 0))
+ goto out_err;
+ ttm_bo_unmap_virtual_locked(bo);
+ ttm_mem_io_unlock(old_man);
+ }
+
+ /*
+ * Create and bind a ttm if required.
+ */
+
+ if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
+ if (bo->ttm == NULL) {
+ bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
+ ret = ttm_bo_add_ttm(bo, zero);
+ if (ret)
+ goto out_err;
+ }
+
+ ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
+ if (ret)
+ goto out_err;
+
+ if (mem->mem_type != TTM_PL_SYSTEM) {
+ ret = ttm_tt_bind(bo->ttm, mem);
+ if (ret)
+ goto out_err;
+ }
+
+ if (bo->mem.mem_type == TTM_PL_SYSTEM) {
+ if (bdev->driver->move_notify)
+ bdev->driver->move_notify(bo, mem);
+ bo->mem = *mem;
+ mem->mm_node = NULL;
+ goto moved;
+ }
+ }
+
+ if (bdev->driver->move_notify)
+ bdev->driver->move_notify(bo, mem);
+
+ if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
+ !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
+ ret = ttm_bo_move_ttm(bo, evict, no_wait_gpu, mem);
+ else if (bdev->driver->move)
+ ret = bdev->driver->move(bo, evict, interruptible,
+ no_wait_gpu, mem);
+ else
+ ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, mem);
+
+ if (ret) {
+ if (bdev->driver->move_notify) {
+ struct ttm_mem_reg tmp_mem = *mem;
+ *mem = bo->mem;
+ bo->mem = tmp_mem;
+ bdev->driver->move_notify(bo, mem);
+ bo->mem = *mem;
+ *mem = tmp_mem;
+ }
+
+ goto out_err;
+ }
+
+moved:
+ if (bo->evicted) {
+ if (bdev->driver->invalidate_caches) {
+ ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
+ if (ret)
+ pr_err("Can not flush read caches\n");
+ }
+ bo->evicted = false;
+ }
+
+ if (bo->mem.mm_node) {
+ bo->offset = (bo->mem.start << PAGE_SHIFT) +
+ bdev->man[bo->mem.mem_type].gpu_offset;
+ bo->cur_placement = bo->mem.placement;
+ } else
+ bo->offset = 0;
+
+ return 0;
+
+out_err:
+ new_man = &bdev->man[bo->mem.mem_type];
+ if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
+ ttm_tt_unbind(bo->ttm);
+ ttm_tt_destroy(bo->ttm);
+ bo->ttm = NULL;
+ }
+
+ return ret;
+}
+
+/**
+ * Call bo::reserved.
+ * Will release GPU memory type usage on destruction.
+ * This is the place to put in driver specific hooks to release
+ * driver private resources.
+ * Will release the bo::reserved lock.
+ */
+
+static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
+{
+ if (bo->bdev->driver->move_notify)
+ bo->bdev->driver->move_notify(bo, NULL);
+
+ if (bo->ttm) {
+ ttm_tt_unbind(bo->ttm);
+ ttm_tt_destroy(bo->ttm);
+ bo->ttm = NULL;
+ }
+ ttm_bo_mem_put(bo, &bo->mem);
+
+ ww_mutex_unlock (&bo->resv->lock);
+}
+
+static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
+{
+ struct reservation_object_list *fobj;
+ struct fence *fence;
+ int i;
+
+ fobj = reservation_object_get_list(bo->resv);
+ fence = reservation_object_get_excl(bo->resv);
+ if (fence && !fence->ops->signaled)
+ fence_enable_sw_signaling(fence);
+
+ for (i = 0; fobj && i < fobj->shared_count; ++i) {
+ fence = rcu_dereference_protected(fobj->shared[i],
+ reservation_object_held(bo->resv));
+
+ if (!fence->ops->signaled)
+ fence_enable_sw_signaling(fence);
+ }
+}
+
+static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
+ int put_count;
+ int ret;
+
+ spin_lock(&glob->lru_lock);
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+
+ if (!ret) {
+ if (!ttm_bo_wait(bo, false, false, true)) {
+ put_count = ttm_bo_del_from_lru(bo);
+
+ spin_unlock(&glob->lru_lock);
+ ttm_bo_cleanup_memtype_use(bo);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ return;
+ } else
+ ttm_bo_flush_all_fences(bo);
+
+ /*
+ * Make NO_EVICT bos immediately available to
+ * shrinkers, now that they are queued for
+ * destruction.
+ */
+ if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
+ bo->mem.placement &= ~TTM_PL_FLAG_NO_EVICT;
+ ttm_bo_add_to_lru(bo);
+ }
+
+ __ttm_bo_unreserve(bo);
+ }
+
+ kref_get(&bo->list_kref);
+ list_add_tail(&bo->ddestroy, &bdev->ddestroy);
+ spin_unlock(&glob->lru_lock);
+
+ schedule_delayed_work(&bdev->wq,
+ ((HZ / 100) < 1) ? 1 : HZ / 100);
+}
+
+/**
+ * function ttm_bo_cleanup_refs_and_unlock
+ * If bo idle, remove from delayed- and lru lists, and unref.
+ * If not idle, do nothing.
+ *
+ * Must be called with lru_lock and reservation held, this function
+ * will drop both before returning.
+ *
+ * @interruptible Any sleeps should occur interruptibly.
+ * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
+ */
+
+static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_global *glob = bo->glob;
+ int put_count;
+ int ret;
+
+ ret = ttm_bo_wait(bo, false, false, true);
+
+ if (ret && !no_wait_gpu) {
+ long lret;
+ ww_mutex_unlock(&bo->resv->lock);
+ spin_unlock(&glob->lru_lock);
+
+ lret = reservation_object_wait_timeout_rcu(bo->resv,
+ true,
+ interruptible,
+ 30 * HZ);
+
+ if (lret < 0)
+ return lret;
+ else if (lret == 0)
+ return -EBUSY;
+
+ spin_lock(&glob->lru_lock);
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+
+ /*
+ * We raced, and lost, someone else holds the reservation now,
+ * and is probably busy in ttm_bo_cleanup_memtype_use.
+ *
+ * Even if it's not the case, because we finished waiting any
+ * delayed destruction would succeed, so just return success
+ * here.
+ */
+ if (ret) {
+ spin_unlock(&glob->lru_lock);
+ return 0;
+ }
+
+ /*
+ * remove sync_obj with ttm_bo_wait, the wait should be
+ * finished, and no new wait object should have been added.
+ */
+ ret = ttm_bo_wait(bo, false, false, true);
+ WARN_ON(ret);
+ }
+
+ if (ret || unlikely(list_empty(&bo->ddestroy))) {
+ __ttm_bo_unreserve(bo);
+ spin_unlock(&glob->lru_lock);
+ return ret;
+ }
+
+ put_count = ttm_bo_del_from_lru(bo);
+ list_del_init(&bo->ddestroy);
+ ++put_count;
+
+ spin_unlock(&glob->lru_lock);
+ ttm_bo_cleanup_memtype_use(bo);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ return 0;
+}
+
+/**
+ * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
+ * encountered buffers.
+ */
+
+static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
+{
+ struct ttm_bo_global *glob = bdev->glob;
+ struct ttm_buffer_object *entry = NULL;
+ int ret = 0;
+
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&bdev->ddestroy))
+ goto out_unlock;
+
+ entry = list_first_entry(&bdev->ddestroy,
+ struct ttm_buffer_object, ddestroy);
+ kref_get(&entry->list_kref);
+
+ for (;;) {
+ struct ttm_buffer_object *nentry = NULL;
+
+ if (entry->ddestroy.next != &bdev->ddestroy) {
+ nentry = list_first_entry(&entry->ddestroy,
+ struct ttm_buffer_object, ddestroy);
+ kref_get(&nentry->list_kref);
+ }
+
+ ret = __ttm_bo_reserve(entry, false, true, false, NULL);
+ if (remove_all && ret) {
+ spin_unlock(&glob->lru_lock);
+ ret = __ttm_bo_reserve(entry, false, false,
+ false, NULL);
+ spin_lock(&glob->lru_lock);
+ }
+
+ if (!ret)
+ ret = ttm_bo_cleanup_refs_and_unlock(entry, false,
+ !remove_all);
+ else
+ spin_unlock(&glob->lru_lock);
+
+ kref_put(&entry->list_kref, ttm_bo_release_list);
+ entry = nentry;
+
+ if (ret || !entry)
+ goto out;
+
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&entry->ddestroy))
+ break;
+ }
+
+out_unlock:
+ spin_unlock(&glob->lru_lock);
+out:
+ if (entry)
+ kref_put(&entry->list_kref, ttm_bo_release_list);
+ return ret;
+}
+
+static void ttm_bo_delayed_workqueue(struct work_struct *work)
+{
+ struct ttm_bo_device *bdev =
+ container_of(work, struct ttm_bo_device, wq.work);
+
+ if (ttm_bo_delayed_delete(bdev, false)) {
+ schedule_delayed_work(&bdev->wq,
+ ((HZ / 100) < 1) ? 1 : HZ / 100);
+ }
+}
+
+static void ttm_bo_release(struct kref *kref)
+{
+ struct ttm_buffer_object *bo =
+ container_of(kref, struct ttm_buffer_object, kref);
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
+
+ drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
+ ttm_mem_io_lock(man, false);
+ ttm_mem_io_free_vm(bo);
+ ttm_mem_io_unlock(man);
+ ttm_bo_cleanup_refs_or_queue(bo);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+}
+
+void ttm_bo_unref(struct ttm_buffer_object **p_bo)
+{
+ struct ttm_buffer_object *bo = *p_bo;
+
+ *p_bo = NULL;
+ kref_put(&bo->kref, ttm_bo_release);
+}
+EXPORT_SYMBOL(ttm_bo_unref);
+
+int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
+{
+ return cancel_delayed_work_sync(&bdev->wq);
+}
+EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
+
+void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
+{
+ if (resched)
+ schedule_delayed_work(&bdev->wq,
+ ((HZ / 100) < 1) ? 1 : HZ / 100);
+}
+EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
+
+static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_reg evict_mem;
+ struct ttm_placement placement;
+ int ret = 0;
+
+ ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
+
+ if (unlikely(ret != 0)) {
+ if (ret != -ERESTARTSYS) {
+ pr_err("Failed to expire sync object before buffer eviction\n");
+ }
+ goto out;
+ }
+
+ lockdep_assert_held(&bo->resv->lock.base);
+
+ evict_mem = bo->mem;
+ evict_mem.mm_node = NULL;
+ evict_mem.bus.io_reserved_vm = false;
+ evict_mem.bus.io_reserved_count = 0;
+
+ placement.num_placement = 0;
+ placement.num_busy_placement = 0;
+ bdev->driver->evict_flags(bo, &placement);
+ ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
+ no_wait_gpu);
+ if (ret) {
+ if (ret != -ERESTARTSYS) {
+ pr_err("Failed to find memory space for buffer 0x%p eviction\n",
+ bo);
+ ttm_bo_mem_space_debug(bo, &placement);
+ }
+ goto out;
+ }
+
+ ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
+ no_wait_gpu);
+ if (ret) {
+ if (ret != -ERESTARTSYS)
+ pr_err("Buffer eviction failed\n");
+ ttm_bo_mem_put(bo, &evict_mem);
+ goto out;
+ }
+ bo->evicted = true;
+out:
+ return ret;
+}
+
+static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
+ uint32_t mem_type,
+ const struct ttm_place *place,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_global *glob = bdev->glob;
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct ttm_buffer_object *bo;
+ int ret = -EBUSY, put_count;
+
+ spin_lock(&glob->lru_lock);
+ list_for_each_entry(bo, &man->lru, lru) {
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+ if (!ret) {
+ if (place && (place->fpfn || place->lpfn)) {
+ /* Don't evict this BO if it's outside of the
+ * requested placement range
+ */
+ if (place->fpfn >= (bo->mem.start + bo->mem.size) ||
+ (place->lpfn && place->lpfn <= bo->mem.start)) {
+ __ttm_bo_unreserve(bo);
+ ret = -EBUSY;
+ continue;
+ }
+ }
+
+ break;
+ }
+ }
+
+ if (ret) {
+ spin_unlock(&glob->lru_lock);
+ return ret;
+ }
+
+ kref_get(&bo->list_kref);
+
+ if (!list_empty(&bo->ddestroy)) {
+ ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible,
+ no_wait_gpu);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+ }
+
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&glob->lru_lock);
+
+ BUG_ON(ret != 0);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ ret = ttm_bo_evict(bo, interruptible, no_wait_gpu);
+ ttm_bo_unreserve(bo);
+
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+}
+
+void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
+{
+ struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
+
+ if (mem->mm_node)
+ (*man->func->put_node)(man, mem);
+}
+EXPORT_SYMBOL(ttm_bo_mem_put);
+
+/**
+ * Repeatedly evict memory from the LRU for @mem_type until we create enough
+ * space, or we've evicted everything and there isn't enough space.
+ */
+static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
+ uint32_t mem_type,
+ const struct ttm_place *place,
+ struct ttm_mem_reg *mem,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ int ret;
+
+ do {
+ ret = (*man->func->get_node)(man, bo, place, mem);
+ if (unlikely(ret != 0))
+ return ret;
+ if (mem->mm_node)
+ break;
+ ret = ttm_mem_evict_first(bdev, mem_type, place,
+ interruptible, no_wait_gpu);
+ if (unlikely(ret != 0))
+ return ret;
+ } while (1);
+ if (mem->mm_node == NULL)
+ return -ENOMEM;
+ mem->mem_type = mem_type;
+ return 0;
+}
+
+static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
+ uint32_t cur_placement,
+ uint32_t proposed_placement)
+{
+ uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
+ uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
+
+ /**
+ * Keep current caching if possible.
+ */
+
+ if ((cur_placement & caching) != 0)
+ result |= (cur_placement & caching);
+ else if ((man->default_caching & caching) != 0)
+ result |= man->default_caching;
+ else if ((TTM_PL_FLAG_CACHED & caching) != 0)
+ result |= TTM_PL_FLAG_CACHED;
+ else if ((TTM_PL_FLAG_WC & caching) != 0)
+ result |= TTM_PL_FLAG_WC;
+ else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
+ result |= TTM_PL_FLAG_UNCACHED;
+
+ return result;
+}
+
+static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
+ uint32_t mem_type,
+ const struct ttm_place *place,
+ uint32_t *masked_placement)
+{
+ uint32_t cur_flags = ttm_bo_type_flags(mem_type);
+
+ if ((cur_flags & place->flags & TTM_PL_MASK_MEM) == 0)
+ return false;
+
+ if ((place->flags & man->available_caching) == 0)
+ return false;
+
+ cur_flags |= (place->flags & man->available_caching);
+
+ *masked_placement = cur_flags;
+ return true;
+}
+
+/**
+ * Creates space for memory region @mem according to its type.
+ *
+ * This function first searches for free space in compatible memory types in
+ * the priority order defined by the driver. If free space isn't found, then
+ * ttm_bo_mem_force_space is attempted in priority order to evict and find
+ * space.
+ */
+int ttm_bo_mem_space(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement,
+ struct ttm_mem_reg *mem,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man;
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ uint32_t cur_flags = 0;
+ bool type_found = false;
+ bool type_ok = false;
+ bool has_erestartsys = false;
+ int i, ret;
+
+ mem->mm_node = NULL;
+ for (i = 0; i < placement->num_placement; ++i) {
+ const struct ttm_place *place = &placement->placement[i];
+
+ ret = ttm_mem_type_from_place(place, &mem_type);
+ if (ret)
+ return ret;
+ man = &bdev->man[mem_type];
+
+ type_ok = ttm_bo_mt_compatible(man, mem_type, place,
+ &cur_flags);
+
+ if (!type_ok)
+ continue;
+
+ cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
+ cur_flags);
+ /*
+ * Use the access and other non-mapping-related flag bits from
+ * the memory placement flags to the current flags
+ */
+ ttm_flag_masked(&cur_flags, place->flags,
+ ~TTM_PL_MASK_MEMTYPE);
+
+ if (mem_type == TTM_PL_SYSTEM)
+ break;
+
+ if (man->has_type && man->use_type) {
+ type_found = true;
+ ret = (*man->func->get_node)(man, bo, place, mem);
+ if (unlikely(ret))
+ return ret;
+ }
+ if (mem->mm_node)
+ break;
+ }
+
+ if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
+ mem->mem_type = mem_type;
+ mem->placement = cur_flags;
+ return 0;
+ }
+
+ if (!type_found)
+ return -EINVAL;
+
+ for (i = 0; i < placement->num_busy_placement; ++i) {
+ const struct ttm_place *place = &placement->busy_placement[i];
+
+ ret = ttm_mem_type_from_place(place, &mem_type);
+ if (ret)
+ return ret;
+ man = &bdev->man[mem_type];
+ if (!man->has_type)
+ continue;
+ if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
+ continue;
+
+ cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
+ cur_flags);
+ /*
+ * Use the access and other non-mapping-related flag bits from
+ * the memory placement flags to the current flags
+ */
+ ttm_flag_masked(&cur_flags, place->flags,
+ ~TTM_PL_MASK_MEMTYPE);
+
+ if (mem_type == TTM_PL_SYSTEM) {
+ mem->mem_type = mem_type;
+ mem->placement = cur_flags;
+ mem->mm_node = NULL;
+ return 0;
+ }
+
+ ret = ttm_bo_mem_force_space(bo, mem_type, place, mem,
+ interruptible, no_wait_gpu);
+ if (ret == 0 && mem->mm_node) {
+ mem->placement = cur_flags;
+ return 0;
+ }
+ if (ret == -ERESTARTSYS)
+ has_erestartsys = true;
+ }
+ ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_mem_space);
+
+static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ int ret = 0;
+ struct ttm_mem_reg mem;
+
+ lockdep_assert_held(&bo->resv->lock.base);
+
+ /*
+ * FIXME: It's possible to pipeline buffer moves.
+ * Have the driver move function wait for idle when necessary,
+ * instead of doing it here.
+ */
+ ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
+ if (ret)
+ return ret;
+ mem.num_pages = bo->num_pages;
+ mem.size = mem.num_pages << PAGE_SHIFT;
+ mem.page_alignment = bo->mem.page_alignment;
+ mem.bus.io_reserved_vm = false;
+ mem.bus.io_reserved_count = 0;
+ /*
+ * Determine where to move the buffer.
+ */
+ ret = ttm_bo_mem_space(bo, placement, &mem,
+ interruptible, no_wait_gpu);
+ if (ret)
+ goto out_unlock;
+ ret = ttm_bo_handle_move_mem(bo, &mem, false,
+ interruptible, no_wait_gpu);
+out_unlock:
+ if (ret && mem.mm_node)
+ ttm_bo_mem_put(bo, &mem);
+ return ret;
+}
+
+static bool ttm_bo_mem_compat(struct ttm_placement *placement,
+ struct ttm_mem_reg *mem,
+ uint32_t *new_flags)
+{
+ int i;
+
+ for (i = 0; i < placement->num_placement; i++) {
+ const struct ttm_place *heap = &placement->placement[i];
+ if (mem->mm_node &&
+ (mem->start < heap->fpfn ||
+ (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
+ continue;
+
+ *new_flags = heap->flags;
+ if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
+ (*new_flags & mem->placement & TTM_PL_MASK_MEM))
+ return true;
+ }
+
+ for (i = 0; i < placement->num_busy_placement; i++) {
+ const struct ttm_place *heap = &placement->busy_placement[i];
+ if (mem->mm_node &&
+ (mem->start < heap->fpfn ||
+ (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
+ continue;
+
+ *new_flags = heap->flags;
+ if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
+ (*new_flags & mem->placement & TTM_PL_MASK_MEM))
+ return true;
+ }
+
+ return false;
+}
+
+int ttm_bo_validate(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ int ret;
+ uint32_t new_flags;
+
+ lockdep_assert_held(&bo->resv->lock.base);
+ /*
+ * Check whether we need to move buffer.
+ */
+ if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
+ ret = ttm_bo_move_buffer(bo, placement, interruptible,
+ no_wait_gpu);
+ if (ret)
+ return ret;
+ } else {
+ /*
+ * Use the access and other non-mapping-related flag bits from
+ * the compatible memory placement flags to the active flags
+ */
+ ttm_flag_masked(&bo->mem.placement, new_flags,
+ ~TTM_PL_MASK_MEMTYPE);
+ }
+ /*
+ * We might need to add a TTM.
+ */
+ if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
+ ret = ttm_bo_add_ttm(bo, true);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_validate);
+
+int ttm_bo_init(struct ttm_bo_device *bdev,
+ struct ttm_buffer_object *bo,
+ unsigned long size,
+ enum ttm_bo_type type,
+ struct ttm_placement *placement,
+ uint32_t page_alignment,
+ bool interruptible,
+ struct file *persistent_swap_storage,
+ size_t acc_size,
+ struct sg_table *sg,
+ struct reservation_object *resv,
+ void (*destroy) (struct ttm_buffer_object *))
+{
+ int ret = 0;
+ unsigned long num_pages;
+ struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
+ bool locked;
+
+ ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
+ if (ret) {
+ pr_err("Out of kernel memory\n");
+ if (destroy)
+ (*destroy)(bo);
+ else
+ kfree(bo);
+ return -ENOMEM;
+ }
+
+ num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ if (num_pages == 0) {
+ pr_err("Illegal buffer object size\n");
+ if (destroy)
+ (*destroy)(bo);
+ else
+ kfree(bo);
+ ttm_mem_global_free(mem_glob, acc_size);
+ return -EINVAL;
+ }
+ bo->destroy = destroy;
+
+ kref_init(&bo->kref);
+ kref_init(&bo->list_kref);
+ atomic_set(&bo->cpu_writers, 0);
+ INIT_LIST_HEAD(&bo->lru);
+ INIT_LIST_HEAD(&bo->ddestroy);
+ INIT_LIST_HEAD(&bo->swap);
+ INIT_LIST_HEAD(&bo->io_reserve_lru);
+ mutex_init(&bo->wu_mutex);
+ bo->bdev = bdev;
+ bo->glob = bdev->glob;
+ bo->type = type;
+ bo->num_pages = num_pages;
+ bo->mem.size = num_pages << PAGE_SHIFT;
+ bo->mem.mem_type = TTM_PL_SYSTEM;
+ bo->mem.num_pages = bo->num_pages;
+ bo->mem.mm_node = NULL;
+ bo->mem.page_alignment = page_alignment;
+ bo->mem.bus.io_reserved_vm = false;
+ bo->mem.bus.io_reserved_count = 0;
+ bo->priv_flags = 0;
+ bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
+ bo->persistent_swap_storage = persistent_swap_storage;
+ bo->acc_size = acc_size;
+ bo->sg = sg;
+ if (resv) {
+ bo->resv = resv;
+ lockdep_assert_held(&bo->resv->lock.base);
+ } else {
+ bo->resv = &bo->ttm_resv;
+ reservation_object_init(&bo->ttm_resv);
+ }
+ atomic_inc(&bo->glob->bo_count);
+ drm_vma_node_reset(&bo->vma_node);
+
+ /*
+ * For ttm_bo_type_device buffers, allocate
+ * address space from the device.
+ */
+ if (bo->type == ttm_bo_type_device ||
+ bo->type == ttm_bo_type_sg)
+ ret = drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
+ bo->mem.num_pages);
+
+ /* passed reservation objects should already be locked,
+ * since otherwise lockdep will be angered in radeon.
+ */
+ if (!resv) {
+ locked = ww_mutex_trylock(&bo->resv->lock);
+ WARN_ON(!locked);
+ }
+
+ if (likely(!ret))
+ ret = ttm_bo_validate(bo, placement, interruptible, false);
+
+ if (!resv)
+ ttm_bo_unreserve(bo);
+
+ if (unlikely(ret))
+ ttm_bo_unref(&bo);
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_init);
+
+size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
+ unsigned long bo_size,
+ unsigned struct_size)
+{
+ unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
+ size_t size = 0;
+
+ size += ttm_round_pot(struct_size);
+ size += PAGE_ALIGN(npages * sizeof(void *));
+ size += ttm_round_pot(sizeof(struct ttm_tt));
+ return size;
+}
+EXPORT_SYMBOL(ttm_bo_acc_size);
+
+size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
+ unsigned long bo_size,
+ unsigned struct_size)
+{
+ unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
+ size_t size = 0;
+
+ size += ttm_round_pot(struct_size);
+ size += PAGE_ALIGN(npages * sizeof(void *));
+ size += PAGE_ALIGN(npages * sizeof(dma_addr_t));
+ size += ttm_round_pot(sizeof(struct ttm_dma_tt));
+ return size;
+}
+EXPORT_SYMBOL(ttm_bo_dma_acc_size);
+
+int ttm_bo_create(struct ttm_bo_device *bdev,
+ unsigned long size,
+ enum ttm_bo_type type,
+ struct ttm_placement *placement,
+ uint32_t page_alignment,
+ bool interruptible,
+ struct file *persistent_swap_storage,
+ struct ttm_buffer_object **p_bo)
+{
+ struct ttm_buffer_object *bo;
+ size_t acc_size;
+ int ret;
+
+ bo = kzalloc(sizeof(*bo), GFP_KERNEL);
+ if (unlikely(bo == NULL))
+ return -ENOMEM;
+
+ acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
+ ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
+ interruptible, persistent_swap_storage, acc_size,
+ NULL, NULL, NULL);
+ if (likely(ret == 0))
+ *p_bo = bo;
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_create);
+
+static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
+ unsigned mem_type, bool allow_errors)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct ttm_bo_global *glob = bdev->glob;
+ int ret;
+
+ /*
+ * Can't use standard list traversal since we're unlocking.
+ */
+
+ spin_lock(&glob->lru_lock);
+ while (!list_empty(&man->lru)) {
+ spin_unlock(&glob->lru_lock);
+ ret = ttm_mem_evict_first(bdev, mem_type, NULL, false, false);
+ if (ret) {
+ if (allow_errors) {
+ return ret;
+ } else {
+ pr_err("Cleanup eviction failed\n");
+ }
+ }
+ spin_lock(&glob->lru_lock);
+ }
+ spin_unlock(&glob->lru_lock);
+ return 0;
+}
+
+int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
+{
+ struct ttm_mem_type_manager *man;
+ int ret = -EINVAL;
+
+ if (mem_type >= TTM_NUM_MEM_TYPES) {
+ pr_err("Illegal memory type %d\n", mem_type);
+ return ret;
+ }
+ man = &bdev->man[mem_type];
+
+ if (!man->has_type) {
+ pr_err("Trying to take down uninitialized memory manager type %u\n",
+ mem_type);
+ return ret;
+ }
+
+ man->use_type = false;
+ man->has_type = false;
+
+ ret = 0;
+ if (mem_type > 0) {
+ ttm_bo_force_list_clean(bdev, mem_type, false);
+
+ ret = (*man->func->takedown)(man);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_clean_mm);
+
+int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+
+ if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
+ pr_err("Illegal memory manager memory type %u\n", mem_type);
+ return -EINVAL;
+ }
+
+ if (!man->has_type) {
+ pr_err("Memory type %u has not been initialized\n", mem_type);
+ return 0;
+ }
+
+ return ttm_bo_force_list_clean(bdev, mem_type, true);
+}
+EXPORT_SYMBOL(ttm_bo_evict_mm);
+
+int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
+ unsigned long p_size)
+{
+ int ret = -EINVAL;
+ struct ttm_mem_type_manager *man;
+
+ BUG_ON(type >= TTM_NUM_MEM_TYPES);
+ man = &bdev->man[type];
+ BUG_ON(man->has_type);
+ man->io_reserve_fastpath = true;
+ man->use_io_reserve_lru = false;
+ mutex_init(&man->io_reserve_mutex);
+ INIT_LIST_HEAD(&man->io_reserve_lru);
+
+ ret = bdev->driver->init_mem_type(bdev, type, man);
+ if (ret)
+ return ret;
+ man->bdev = bdev;
+
+ ret = 0;
+ if (type != TTM_PL_SYSTEM) {
+ ret = (*man->func->init)(man, p_size);
+ if (ret)
+ return ret;
+ }
+ man->has_type = true;
+ man->use_type = true;
+ man->size = p_size;
+
+ INIT_LIST_HEAD(&man->lru);
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_init_mm);
+
+static void ttm_bo_global_kobj_release(struct kobject *kobj)
+{
+ struct ttm_bo_global *glob =
+ container_of(kobj, struct ttm_bo_global, kobj);
+
+ ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
+ __free_page(glob->dummy_read_page);
+ kfree(glob);
+}
+
+void ttm_bo_global_release(struct drm_global_reference *ref)
+{
+ struct ttm_bo_global *glob = ref->object;
+
+ kobject_del(&glob->kobj);
+ kobject_put(&glob->kobj);
+}
+EXPORT_SYMBOL(ttm_bo_global_release);
+
+int ttm_bo_global_init(struct drm_global_reference *ref)
+{
+ struct ttm_bo_global_ref *bo_ref =
+ container_of(ref, struct ttm_bo_global_ref, ref);
+ struct ttm_bo_global *glob = ref->object;
+ int ret;
+
+ mutex_init(&glob->device_list_mutex);
+ spin_lock_init(&glob->lru_lock);
+ glob->mem_glob = bo_ref->mem_glob;
+ glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
+
+ if (unlikely(glob->dummy_read_page == NULL)) {
+ ret = -ENOMEM;
+ goto out_no_drp;
+ }
+
+ INIT_LIST_HEAD(&glob->swap_lru);
+ INIT_LIST_HEAD(&glob->device_list);
+
+ ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
+ ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
+ if (unlikely(ret != 0)) {
+ pr_err("Could not register buffer object swapout\n");
+ goto out_no_shrink;
+ }
+
+ atomic_set(&glob->bo_count, 0);
+
+ ret = kobject_init_and_add(
+ &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
+ if (unlikely(ret != 0))
+ kobject_put(&glob->kobj);
+ return ret;
+out_no_shrink:
+ __free_page(glob->dummy_read_page);
+out_no_drp:
+ kfree(glob);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_global_init);
+
+
+int ttm_bo_device_release(struct ttm_bo_device *bdev)
+{
+ int ret = 0;
+ unsigned i = TTM_NUM_MEM_TYPES;
+ struct ttm_mem_type_manager *man;
+ struct ttm_bo_global *glob = bdev->glob;
+
+ while (i--) {
+ man = &bdev->man[i];
+ if (man->has_type) {
+ man->use_type = false;
+ if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
+ ret = -EBUSY;
+ pr_err("DRM memory manager type %d is not clean\n",
+ i);
+ }
+ man->has_type = false;
+ }
+ }
+
+ mutex_lock(&glob->device_list_mutex);
+ list_del(&bdev->device_list);
+ mutex_unlock(&glob->device_list_mutex);
+
+ cancel_delayed_work_sync(&bdev->wq);
+
+ while (ttm_bo_delayed_delete(bdev, true))
+ ;
+
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&bdev->ddestroy))
+ TTM_DEBUG("Delayed destroy list was clean\n");
+
+ if (list_empty(&bdev->man[0].lru))
+ TTM_DEBUG("Swap list was clean\n");
+ spin_unlock(&glob->lru_lock);
+
+ drm_vma_offset_manager_destroy(&bdev->vma_manager);
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_device_release);
+
+int ttm_bo_device_init(struct ttm_bo_device *bdev,
+ struct ttm_bo_global *glob,
+ struct ttm_bo_driver *driver,
+ struct address_space *mapping,
+ uint64_t file_page_offset,
+ bool need_dma32)
+{
+ int ret = -EINVAL;
+
+ bdev->driver = driver;
+
+ memset(bdev->man, 0, sizeof(bdev->man));
+
+ /*
+ * Initialize the system memory buffer type.
+ * Other types need to be driver / IOCTL initialized.
+ */
+ ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
+ if (unlikely(ret != 0))
+ goto out_no_sys;
+
+ drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
+ 0x10000000);
+ INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
+ INIT_LIST_HEAD(&bdev->ddestroy);
+ bdev->dev_mapping = mapping;
+ bdev->glob = glob;
+ bdev->need_dma32 = need_dma32;
+ bdev->val_seq = 0;
+ mutex_lock(&glob->device_list_mutex);
+ list_add_tail(&bdev->device_list, &glob->device_list);
+ mutex_unlock(&glob->device_list_mutex);
+
+ return 0;
+out_no_sys:
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_device_init);
+
+/*
+ * buffer object vm functions.
+ */
+
+bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+
+ if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
+ if (mem->mem_type == TTM_PL_SYSTEM)
+ return false;
+
+ if (man->flags & TTM_MEMTYPE_FLAG_CMA)
+ return false;
+
+ if (mem->placement & TTM_PL_FLAG_CACHED)
+ return false;
+ }
+ return true;
+}
+
+void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+
+ drm_vma_node_unmap(&bo->vma_node, bdev->dev_mapping);
+ ttm_mem_io_free_vm(bo);
+}
+
+void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
+
+ ttm_mem_io_lock(man, false);
+ ttm_bo_unmap_virtual_locked(bo);
+ ttm_mem_io_unlock(man);
+}
+
+
+EXPORT_SYMBOL(ttm_bo_unmap_virtual);
+
+int ttm_bo_wait(struct ttm_buffer_object *bo,
+ bool lazy, bool interruptible, bool no_wait)
+{
+ struct reservation_object_list *fobj;
+ struct reservation_object *resv;
+ struct fence *excl;
+ long timeout = 15 * HZ;
+ int i;
+
+ resv = bo->resv;
+ fobj = reservation_object_get_list(resv);
+ excl = reservation_object_get_excl(resv);
+ if (excl) {
+ if (!fence_is_signaled(excl)) {
+ if (no_wait)
+ return -EBUSY;
+
+ timeout = fence_wait_timeout(excl,
+ interruptible, timeout);
+ }
+ }
+
+ for (i = 0; fobj && timeout > 0 && i < fobj->shared_count; ++i) {
+ struct fence *fence;
+ fence = rcu_dereference_protected(fobj->shared[i],
+ reservation_object_held(resv));
+
+ if (!fence_is_signaled(fence)) {
+ if (no_wait)
+ return -EBUSY;
+
+ timeout = fence_wait_timeout(fence,
+ interruptible, timeout);
+ }
+ }
+
+ if (timeout < 0)
+ return timeout;
+
+ if (timeout == 0)
+ return -EBUSY;
+
+ reservation_object_add_excl_fence(resv, NULL);
+ clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_wait);
+
+int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
+{
+ int ret = 0;
+
+ /*
+ * Using ttm_bo_reserve makes sure the lru lists are updated.
+ */
+
+ ret = ttm_bo_reserve(bo, true, no_wait, false, NULL);
+ if (unlikely(ret != 0))
+ return ret;
+ ret = ttm_bo_wait(bo, false, true, no_wait);
+ if (likely(ret == 0))
+ atomic_inc(&bo->cpu_writers);
+ ttm_bo_unreserve(bo);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
+
+void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
+{
+ atomic_dec(&bo->cpu_writers);
+}
+EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
+
+/**
+ * A buffer object shrink method that tries to swap out the first
+ * buffer object on the bo_global::swap_lru list.
+ */
+
+static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
+{
+ struct ttm_bo_global *glob =
+ container_of(shrink, struct ttm_bo_global, shrink);
+ struct ttm_buffer_object *bo;
+ int ret = -EBUSY;
+ int put_count;
+ uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
+
+ spin_lock(&glob->lru_lock);
+ list_for_each_entry(bo, &glob->swap_lru, swap) {
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+ if (!ret)
+ break;
+ }
+
+ if (ret) {
+ spin_unlock(&glob->lru_lock);
+ return ret;
+ }
+
+ kref_get(&bo->list_kref);
+
+ if (!list_empty(&bo->ddestroy)) {
+ ret = ttm_bo_cleanup_refs_and_unlock(bo, false, false);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+ }
+
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&glob->lru_lock);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ /**
+ * Wait for GPU, then move to system cached.
+ */
+
+ ret = ttm_bo_wait(bo, false, false, false);
+
+ if (unlikely(ret != 0))
+ goto out;
+
+ if ((bo->mem.placement & swap_placement) != swap_placement) {
+ struct ttm_mem_reg evict_mem;
+
+ evict_mem = bo->mem;
+ evict_mem.mm_node = NULL;
+ evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
+ evict_mem.mem_type = TTM_PL_SYSTEM;
+
+ ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
+ false, false);
+ if (unlikely(ret != 0))
+ goto out;
+ }
+
+ ttm_bo_unmap_virtual(bo);
+
+ /**
+ * Swap out. Buffer will be swapped in again as soon as
+ * anyone tries to access a ttm page.
+ */
+
+ if (bo->bdev->driver->swap_notify)
+ bo->bdev->driver->swap_notify(bo);
+
+ ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
+out:
+
+ /**
+ *
+ * Unreserve without putting on LRU to avoid swapping out an
+ * already swapped buffer.
+ */
+
+ __ttm_bo_unreserve(bo);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+}
+
+void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
+{
+ while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
+ ;
+}
+EXPORT_SYMBOL(ttm_bo_swapout_all);
+
+/**
+ * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
+ * unreserved
+ *
+ * @bo: Pointer to buffer
+ */
+int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
+{
+ int ret;
+
+ /*
+ * In the absense of a wait_unlocked API,
+ * Use the bo::wu_mutex to avoid triggering livelocks due to
+ * concurrent use of this function. Note that this use of
+ * bo::wu_mutex can go away if we change locking order to
+ * mmap_sem -> bo::reserve.
+ */
+ ret = mutex_lock_interruptible(&bo->wu_mutex);
+ if (unlikely(ret != 0))
+ return -ERESTARTSYS;
+ if (!ww_mutex_is_locked(&bo->resv->lock))
+ goto out_unlock;
+ ret = __ttm_bo_reserve(bo, true, false, false, NULL);
+ if (unlikely(ret != 0))
+ goto out_unlock;
+ __ttm_bo_unreserve(bo);
+
+out_unlock:
+ mutex_unlock(&bo->wu_mutex);
+ return ret;
+}
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_bo_manager.c b/kernel/drivers/gpu/drm/ttm/ttm_bo_manager.c
new file mode 100644
index 000000000..aa0bd054d
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_bo_manager.c
@@ -0,0 +1,157 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#include <drm/ttm/ttm_module.h>
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/drm_mm.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/module.h>
+
+/**
+ * Currently we use a spinlock for the lock, but a mutex *may* be
+ * more appropriate to reduce scheduling latency if the range manager
+ * ends up with very fragmented allocation patterns.
+ */
+
+struct ttm_range_manager {
+ struct drm_mm mm;
+ spinlock_t lock;
+};
+
+static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
+ struct ttm_buffer_object *bo,
+ const struct ttm_place *place,
+ struct ttm_mem_reg *mem)
+{
+ struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
+ struct drm_mm *mm = &rman->mm;
+ struct drm_mm_node *node = NULL;
+ enum drm_mm_search_flags sflags = DRM_MM_SEARCH_BEST;
+ enum drm_mm_allocator_flags aflags = DRM_MM_CREATE_DEFAULT;
+ unsigned long lpfn;
+ int ret;
+
+ lpfn = place->lpfn;
+ if (!lpfn)
+ lpfn = man->size;
+
+ node = kzalloc(sizeof(*node), GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+
+ if (place->flags & TTM_PL_FLAG_TOPDOWN) {
+ sflags = DRM_MM_SEARCH_BELOW;
+ aflags = DRM_MM_CREATE_TOP;
+ }
+
+ spin_lock(&rman->lock);
+ ret = drm_mm_insert_node_in_range_generic(mm, node, mem->num_pages,
+ mem->page_alignment, 0,
+ place->fpfn, lpfn,
+ sflags, aflags);
+ spin_unlock(&rman->lock);
+
+ if (unlikely(ret)) {
+ kfree(node);
+ } else {
+ mem->mm_node = node;
+ mem->start = node->start;
+ }
+
+ return 0;
+}
+
+static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
+ struct ttm_mem_reg *mem)
+{
+ struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
+
+ if (mem->mm_node) {
+ spin_lock(&rman->lock);
+ drm_mm_remove_node(mem->mm_node);
+ spin_unlock(&rman->lock);
+
+ kfree(mem->mm_node);
+ mem->mm_node = NULL;
+ }
+}
+
+static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
+ unsigned long p_size)
+{
+ struct ttm_range_manager *rman;
+
+ rman = kzalloc(sizeof(*rman), GFP_KERNEL);
+ if (!rman)
+ return -ENOMEM;
+
+ drm_mm_init(&rman->mm, 0, p_size);
+ spin_lock_init(&rman->lock);
+ man->priv = rman;
+ return 0;
+}
+
+static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
+{
+ struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
+ struct drm_mm *mm = &rman->mm;
+
+ spin_lock(&rman->lock);
+ if (drm_mm_clean(mm)) {
+ drm_mm_takedown(mm);
+ spin_unlock(&rman->lock);
+ kfree(rman);
+ man->priv = NULL;
+ return 0;
+ }
+ spin_unlock(&rman->lock);
+ return -EBUSY;
+}
+
+static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
+ const char *prefix)
+{
+ struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
+
+ spin_lock(&rman->lock);
+ drm_mm_debug_table(&rman->mm, prefix);
+ spin_unlock(&rman->lock);
+}
+
+const struct ttm_mem_type_manager_func ttm_bo_manager_func = {
+ ttm_bo_man_init,
+ ttm_bo_man_takedown,
+ ttm_bo_man_get_node,
+ ttm_bo_man_put_node,
+ ttm_bo_man_debug
+};
+EXPORT_SYMBOL(ttm_bo_manager_func);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_bo_util.c b/kernel/drivers/gpu/drm/ttm/ttm_bo_util.c
new file mode 100644
index 000000000..882cccdad
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -0,0 +1,695 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/drm_vma_manager.h>
+#include <linux/io.h>
+#include <linux/highmem.h>
+#include <linux/wait.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/reservation.h>
+
+void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
+{
+ ttm_bo_mem_put(bo, &bo->mem);
+}
+
+int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
+ bool evict,
+ bool no_wait_gpu, struct ttm_mem_reg *new_mem)
+{
+ struct ttm_tt *ttm = bo->ttm;
+ struct ttm_mem_reg *old_mem = &bo->mem;
+ int ret;
+
+ if (old_mem->mem_type != TTM_PL_SYSTEM) {
+ ttm_tt_unbind(ttm);
+ ttm_bo_free_old_node(bo);
+ ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
+ TTM_PL_MASK_MEM);
+ old_mem->mem_type = TTM_PL_SYSTEM;
+ }
+
+ ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
+ if (unlikely(ret != 0))
+ return ret;
+
+ if (new_mem->mem_type != TTM_PL_SYSTEM) {
+ ret = ttm_tt_bind(ttm, new_mem);
+ if (unlikely(ret != 0))
+ return ret;
+ }
+
+ *old_mem = *new_mem;
+ new_mem->mm_node = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_move_ttm);
+
+int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
+{
+ if (likely(man->io_reserve_fastpath))
+ return 0;
+
+ if (interruptible)
+ return mutex_lock_interruptible(&man->io_reserve_mutex);
+
+ mutex_lock(&man->io_reserve_mutex);
+ return 0;
+}
+EXPORT_SYMBOL(ttm_mem_io_lock);
+
+void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
+{
+ if (likely(man->io_reserve_fastpath))
+ return;
+
+ mutex_unlock(&man->io_reserve_mutex);
+}
+EXPORT_SYMBOL(ttm_mem_io_unlock);
+
+static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
+{
+ struct ttm_buffer_object *bo;
+
+ if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
+ return -EAGAIN;
+
+ bo = list_first_entry(&man->io_reserve_lru,
+ struct ttm_buffer_object,
+ io_reserve_lru);
+ list_del_init(&bo->io_reserve_lru);
+ ttm_bo_unmap_virtual_locked(bo);
+
+ return 0;
+}
+
+
+int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
+ struct ttm_mem_reg *mem)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+ int ret = 0;
+
+ if (!bdev->driver->io_mem_reserve)
+ return 0;
+ if (likely(man->io_reserve_fastpath))
+ return bdev->driver->io_mem_reserve(bdev, mem);
+
+ if (bdev->driver->io_mem_reserve &&
+ mem->bus.io_reserved_count++ == 0) {
+retry:
+ ret = bdev->driver->io_mem_reserve(bdev, mem);
+ if (ret == -EAGAIN) {
+ ret = ttm_mem_io_evict(man);
+ if (ret == 0)
+ goto retry;
+ }
+ }
+ return ret;
+}
+EXPORT_SYMBOL(ttm_mem_io_reserve);
+
+void ttm_mem_io_free(struct ttm_bo_device *bdev,
+ struct ttm_mem_reg *mem)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+
+ if (likely(man->io_reserve_fastpath))
+ return;
+
+ if (bdev->driver->io_mem_reserve &&
+ --mem->bus.io_reserved_count == 0 &&
+ bdev->driver->io_mem_free)
+ bdev->driver->io_mem_free(bdev, mem);
+
+}
+EXPORT_SYMBOL(ttm_mem_io_free);
+
+int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
+{
+ struct ttm_mem_reg *mem = &bo->mem;
+ int ret;
+
+ if (!mem->bus.io_reserved_vm) {
+ struct ttm_mem_type_manager *man =
+ &bo->bdev->man[mem->mem_type];
+
+ ret = ttm_mem_io_reserve(bo->bdev, mem);
+ if (unlikely(ret != 0))
+ return ret;
+ mem->bus.io_reserved_vm = true;
+ if (man->use_io_reserve_lru)
+ list_add_tail(&bo->io_reserve_lru,
+ &man->io_reserve_lru);
+ }
+ return 0;
+}
+
+void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
+{
+ struct ttm_mem_reg *mem = &bo->mem;
+
+ if (mem->bus.io_reserved_vm) {
+ mem->bus.io_reserved_vm = false;
+ list_del_init(&bo->io_reserve_lru);
+ ttm_mem_io_free(bo->bdev, mem);
+ }
+}
+
+static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
+ void **virtual)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+ int ret;
+ void *addr;
+
+ *virtual = NULL;
+ (void) ttm_mem_io_lock(man, false);
+ ret = ttm_mem_io_reserve(bdev, mem);
+ ttm_mem_io_unlock(man);
+ if (ret || !mem->bus.is_iomem)
+ return ret;
+
+ if (mem->bus.addr) {
+ addr = mem->bus.addr;
+ } else {
+ if (mem->placement & TTM_PL_FLAG_WC)
+ addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
+ else
+ addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
+ if (!addr) {
+ (void) ttm_mem_io_lock(man, false);
+ ttm_mem_io_free(bdev, mem);
+ ttm_mem_io_unlock(man);
+ return -ENOMEM;
+ }
+ }
+ *virtual = addr;
+ return 0;
+}
+
+static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
+ void *virtual)
+{
+ struct ttm_mem_type_manager *man;
+
+ man = &bdev->man[mem->mem_type];
+
+ if (virtual && mem->bus.addr == NULL)
+ iounmap(virtual);
+ (void) ttm_mem_io_lock(man, false);
+ ttm_mem_io_free(bdev, mem);
+ ttm_mem_io_unlock(man);
+}
+
+static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
+{
+ uint32_t *dstP =
+ (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
+ uint32_t *srcP =
+ (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
+
+ int i;
+ for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
+ iowrite32(ioread32(srcP++), dstP++);
+ return 0;
+}
+
+static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
+ unsigned long page,
+ pgprot_t prot)
+{
+ struct page *d = ttm->pages[page];
+ void *dst;
+
+ if (!d)
+ return -ENOMEM;
+
+ src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
+
+#ifdef CONFIG_X86
+ dst = kmap_atomic_prot(d, prot);
+#else
+ if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
+ dst = vmap(&d, 1, 0, prot);
+ else
+ dst = kmap(d);
+#endif
+ if (!dst)
+ return -ENOMEM;
+
+ memcpy_fromio(dst, src, PAGE_SIZE);
+
+#ifdef CONFIG_X86
+ kunmap_atomic(dst);
+#else
+ if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
+ vunmap(dst);
+ else
+ kunmap(d);
+#endif
+
+ return 0;
+}
+
+static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
+ unsigned long page,
+ pgprot_t prot)
+{
+ struct page *s = ttm->pages[page];
+ void *src;
+
+ if (!s)
+ return -ENOMEM;
+
+ dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
+#ifdef CONFIG_X86
+ src = kmap_atomic_prot(s, prot);
+#else
+ if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
+ src = vmap(&s, 1, 0, prot);
+ else
+ src = kmap(s);
+#endif
+ if (!src)
+ return -ENOMEM;
+
+ memcpy_toio(dst, src, PAGE_SIZE);
+
+#ifdef CONFIG_X86
+ kunmap_atomic(src);
+#else
+ if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
+ vunmap(src);
+ else
+ kunmap(s);
+#endif
+
+ return 0;
+}
+
+int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
+ bool evict, bool no_wait_gpu,
+ struct ttm_mem_reg *new_mem)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
+ struct ttm_tt *ttm = bo->ttm;
+ struct ttm_mem_reg *old_mem = &bo->mem;
+ struct ttm_mem_reg old_copy = *old_mem;
+ void *old_iomap;
+ void *new_iomap;
+ int ret;
+ unsigned long i;
+ unsigned long page;
+ unsigned long add = 0;
+ int dir;
+
+ ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
+ if (ret)
+ return ret;
+ ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
+ if (ret)
+ goto out;
+
+ /*
+ * Single TTM move. NOP.
+ */
+ if (old_iomap == NULL && new_iomap == NULL)
+ goto out2;
+
+ /*
+ * Don't move nonexistent data. Clear destination instead.
+ */
+ if (old_iomap == NULL &&
+ (ttm == NULL || (ttm->state == tt_unpopulated &&
+ !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {
+ memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);
+ goto out2;
+ }
+
+ /*
+ * TTM might be null for moves within the same region.
+ */
+ if (ttm && ttm->state == tt_unpopulated) {
+ ret = ttm->bdev->driver->ttm_tt_populate(ttm);
+ if (ret)
+ goto out1;
+ }
+
+ add = 0;
+ dir = 1;
+
+ if ((old_mem->mem_type == new_mem->mem_type) &&
+ (new_mem->start < old_mem->start + old_mem->size)) {
+ dir = -1;
+ add = new_mem->num_pages - 1;
+ }
+
+ for (i = 0; i < new_mem->num_pages; ++i) {
+ page = i * dir + add;
+ if (old_iomap == NULL) {
+ pgprot_t prot = ttm_io_prot(old_mem->placement,
+ PAGE_KERNEL);
+ ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
+ prot);
+ } else if (new_iomap == NULL) {
+ pgprot_t prot = ttm_io_prot(new_mem->placement,
+ PAGE_KERNEL);
+ ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
+ prot);
+ } else
+ ret = ttm_copy_io_page(new_iomap, old_iomap, page);
+ if (ret)
+ goto out1;
+ }
+ mb();
+out2:
+ old_copy = *old_mem;
+ *old_mem = *new_mem;
+ new_mem->mm_node = NULL;
+
+ if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
+ ttm_tt_unbind(ttm);
+ ttm_tt_destroy(ttm);
+ bo->ttm = NULL;
+ }
+
+out1:
+ ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
+out:
+ ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
+
+ /*
+ * On error, keep the mm node!
+ */
+ if (!ret)
+ ttm_bo_mem_put(bo, &old_copy);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_move_memcpy);
+
+static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
+{
+ kfree(bo);
+}
+
+/**
+ * ttm_buffer_object_transfer
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
+ * holding the data of @bo with the old placement.
+ *
+ * This is a utility function that may be called after an accelerated move
+ * has been scheduled. A new buffer object is created as a placeholder for
+ * the old data while it's being copied. When that buffer object is idle,
+ * it can be destroyed, releasing the space of the old placement.
+ * Returns:
+ * !0: Failure.
+ */
+
+static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
+ struct ttm_buffer_object **new_obj)
+{
+ struct ttm_buffer_object *fbo;
+ int ret;
+
+ fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
+ if (!fbo)
+ return -ENOMEM;
+
+ *fbo = *bo;
+
+ /**
+ * Fix up members that we shouldn't copy directly:
+ * TODO: Explicit member copy would probably be better here.
+ */
+
+ INIT_LIST_HEAD(&fbo->ddestroy);
+ INIT_LIST_HEAD(&fbo->lru);
+ INIT_LIST_HEAD(&fbo->swap);
+ INIT_LIST_HEAD(&fbo->io_reserve_lru);
+ drm_vma_node_reset(&fbo->vma_node);
+ atomic_set(&fbo->cpu_writers, 0);
+
+ kref_init(&fbo->list_kref);
+ kref_init(&fbo->kref);
+ fbo->destroy = &ttm_transfered_destroy;
+ fbo->acc_size = 0;
+ fbo->resv = &fbo->ttm_resv;
+ reservation_object_init(fbo->resv);
+ ret = ww_mutex_trylock(&fbo->resv->lock);
+ WARN_ON(!ret);
+
+ *new_obj = fbo;
+ return 0;
+}
+
+pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
+{
+ /* Cached mappings need no adjustment */
+ if (caching_flags & TTM_PL_FLAG_CACHED)
+ return tmp;
+
+#if defined(__i386__) || defined(__x86_64__)
+ if (caching_flags & TTM_PL_FLAG_WC)
+ tmp = pgprot_writecombine(tmp);
+ else if (boot_cpu_data.x86 > 3)
+ tmp = pgprot_noncached(tmp);
+#endif
+#if defined(__ia64__) || defined(__arm__) || defined(__powerpc__)
+ if (caching_flags & TTM_PL_FLAG_WC)
+ tmp = pgprot_writecombine(tmp);
+ else
+ tmp = pgprot_noncached(tmp);
+#endif
+#if defined(__sparc__) || defined(__mips__)
+ tmp = pgprot_noncached(tmp);
+#endif
+ return tmp;
+}
+EXPORT_SYMBOL(ttm_io_prot);
+
+static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
+ unsigned long offset,
+ unsigned long size,
+ struct ttm_bo_kmap_obj *map)
+{
+ struct ttm_mem_reg *mem = &bo->mem;
+
+ if (bo->mem.bus.addr) {
+ map->bo_kmap_type = ttm_bo_map_premapped;
+ map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
+ } else {
+ map->bo_kmap_type = ttm_bo_map_iomap;
+ if (mem->placement & TTM_PL_FLAG_WC)
+ map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
+ size);
+ else
+ map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
+ size);
+ }
+ return (!map->virtual) ? -ENOMEM : 0;
+}
+
+static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
+ unsigned long start_page,
+ unsigned long num_pages,
+ struct ttm_bo_kmap_obj *map)
+{
+ struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
+ struct ttm_tt *ttm = bo->ttm;
+ int ret;
+
+ BUG_ON(!ttm);
+
+ if (ttm->state == tt_unpopulated) {
+ ret = ttm->bdev->driver->ttm_tt_populate(ttm);
+ if (ret)
+ return ret;
+ }
+
+ if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
+ /*
+ * We're mapping a single page, and the desired
+ * page protection is consistent with the bo.
+ */
+
+ map->bo_kmap_type = ttm_bo_map_kmap;
+ map->page = ttm->pages[start_page];
+ map->virtual = kmap(map->page);
+ } else {
+ /*
+ * We need to use vmap to get the desired page protection
+ * or to make the buffer object look contiguous.
+ */
+ prot = ttm_io_prot(mem->placement, PAGE_KERNEL);
+ map->bo_kmap_type = ttm_bo_map_vmap;
+ map->virtual = vmap(ttm->pages + start_page, num_pages,
+ 0, prot);
+ }
+ return (!map->virtual) ? -ENOMEM : 0;
+}
+
+int ttm_bo_kmap(struct ttm_buffer_object *bo,
+ unsigned long start_page, unsigned long num_pages,
+ struct ttm_bo_kmap_obj *map)
+{
+ struct ttm_mem_type_manager *man =
+ &bo->bdev->man[bo->mem.mem_type];
+ unsigned long offset, size;
+ int ret;
+
+ BUG_ON(!list_empty(&bo->swap));
+ map->virtual = NULL;
+ map->bo = bo;
+ if (num_pages > bo->num_pages)
+ return -EINVAL;
+ if (start_page > bo->num_pages)
+ return -EINVAL;
+#if 0
+ if (num_pages > 1 && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+#endif
+ (void) ttm_mem_io_lock(man, false);
+ ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
+ ttm_mem_io_unlock(man);
+ if (ret)
+ return ret;
+ if (!bo->mem.bus.is_iomem) {
+ return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
+ } else {
+ offset = start_page << PAGE_SHIFT;
+ size = num_pages << PAGE_SHIFT;
+ return ttm_bo_ioremap(bo, offset, size, map);
+ }
+}
+EXPORT_SYMBOL(ttm_bo_kmap);
+
+void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
+{
+ struct ttm_buffer_object *bo = map->bo;
+ struct ttm_mem_type_manager *man =
+ &bo->bdev->man[bo->mem.mem_type];
+
+ if (!map->virtual)
+ return;
+ switch (map->bo_kmap_type) {
+ case ttm_bo_map_iomap:
+ iounmap(map->virtual);
+ break;
+ case ttm_bo_map_vmap:
+ vunmap(map->virtual);
+ break;
+ case ttm_bo_map_kmap:
+ kunmap(map->page);
+ break;
+ case ttm_bo_map_premapped:
+ break;
+ default:
+ BUG();
+ }
+ (void) ttm_mem_io_lock(man, false);
+ ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
+ ttm_mem_io_unlock(man);
+ map->virtual = NULL;
+ map->page = NULL;
+}
+EXPORT_SYMBOL(ttm_bo_kunmap);
+
+int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
+ struct fence *fence,
+ bool evict,
+ bool no_wait_gpu,
+ struct ttm_mem_reg *new_mem)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
+ struct ttm_mem_reg *old_mem = &bo->mem;
+ int ret;
+ struct ttm_buffer_object *ghost_obj;
+
+ reservation_object_add_excl_fence(bo->resv, fence);
+ if (evict) {
+ ret = ttm_bo_wait(bo, false, false, false);
+ if (ret)
+ return ret;
+
+ if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
+ (bo->ttm != NULL)) {
+ ttm_tt_unbind(bo->ttm);
+ ttm_tt_destroy(bo->ttm);
+ bo->ttm = NULL;
+ }
+ ttm_bo_free_old_node(bo);
+ } else {
+ /**
+ * This should help pipeline ordinary buffer moves.
+ *
+ * Hang old buffer memory on a new buffer object,
+ * and leave it to be released when the GPU
+ * operation has completed.
+ */
+
+ set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
+
+ ret = ttm_buffer_object_transfer(bo, &ghost_obj);
+ if (ret)
+ return ret;
+
+ reservation_object_add_excl_fence(ghost_obj->resv, fence);
+
+ /**
+ * If we're not moving to fixed memory, the TTM object
+ * needs to stay alive. Otherwhise hang it on the ghost
+ * bo to be unbound and destroyed.
+ */
+
+ if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
+ ghost_obj->ttm = NULL;
+ else
+ bo->ttm = NULL;
+
+ ttm_bo_unreserve(ghost_obj);
+ ttm_bo_unref(&ghost_obj);
+ }
+
+ *old_mem = *new_mem;
+ new_mem->mm_node = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_bo_vm.c b/kernel/drivers/gpu/drm/ttm/ttm_bo_vm.c
new file mode 100644
index 000000000..8fb721327
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -0,0 +1,364 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <ttm/ttm_module.h>
+#include <ttm/ttm_bo_driver.h>
+#include <ttm/ttm_placement.h>
+#include <drm/drm_vma_manager.h>
+#include <linux/mm.h>
+#include <linux/rbtree.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+
+#define TTM_BO_VM_NUM_PREFAULT 16
+
+static int ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo,
+ struct vm_area_struct *vma,
+ struct vm_fault *vmf)
+{
+ int ret = 0;
+
+ if (likely(!test_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags)))
+ goto out_unlock;
+
+ /*
+ * Quick non-stalling check for idle.
+ */
+ ret = ttm_bo_wait(bo, false, false, true);
+ if (likely(ret == 0))
+ goto out_unlock;
+
+ /*
+ * If possible, avoid waiting for GPU with mmap_sem
+ * held.
+ */
+ if (vmf->flags & FAULT_FLAG_ALLOW_RETRY) {
+ ret = VM_FAULT_RETRY;
+ if (vmf->flags & FAULT_FLAG_RETRY_NOWAIT)
+ goto out_unlock;
+
+ up_read(&vma->vm_mm->mmap_sem);
+ (void) ttm_bo_wait(bo, false, true, false);
+ goto out_unlock;
+ }
+
+ /*
+ * Ordinary wait.
+ */
+ ret = ttm_bo_wait(bo, false, true, false);
+ if (unlikely(ret != 0))
+ ret = (ret != -ERESTARTSYS) ? VM_FAULT_SIGBUS :
+ VM_FAULT_NOPAGE;
+
+out_unlock:
+ return ret;
+}
+
+static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
+ vma->vm_private_data;
+ struct ttm_bo_device *bdev = bo->bdev;
+ unsigned long page_offset;
+ unsigned long page_last;
+ unsigned long pfn;
+ struct ttm_tt *ttm = NULL;
+ struct page *page;
+ int ret;
+ int i;
+ unsigned long address = (unsigned long)vmf->virtual_address;
+ int retval = VM_FAULT_NOPAGE;
+ struct ttm_mem_type_manager *man =
+ &bdev->man[bo->mem.mem_type];
+ struct vm_area_struct cvma;
+
+ /*
+ * Work around locking order reversal in fault / nopfn
+ * between mmap_sem and bo_reserve: Perform a trylock operation
+ * for reserve, and if it fails, retry the fault after waiting
+ * for the buffer to become unreserved.
+ */
+ ret = ttm_bo_reserve(bo, true, true, false, NULL);
+ if (unlikely(ret != 0)) {
+ if (ret != -EBUSY)
+ return VM_FAULT_NOPAGE;
+
+ if (vmf->flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (!(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) {
+ up_read(&vma->vm_mm->mmap_sem);
+ (void) ttm_bo_wait_unreserved(bo);
+ }
+
+ return VM_FAULT_RETRY;
+ }
+
+ /*
+ * If we'd want to change locking order to
+ * mmap_sem -> bo::reserve, we'd use a blocking reserve here
+ * instead of retrying the fault...
+ */
+ return VM_FAULT_NOPAGE;
+ }
+
+ /*
+ * Refuse to fault imported pages. This should be handled
+ * (if at all) by redirecting mmap to the exporter.
+ */
+ if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+ retval = VM_FAULT_SIGBUS;
+ goto out_unlock;
+ }
+
+ if (bdev->driver->fault_reserve_notify) {
+ ret = bdev->driver->fault_reserve_notify(bo);
+ switch (ret) {
+ case 0:
+ break;
+ case -EBUSY:
+ case -ERESTARTSYS:
+ retval = VM_FAULT_NOPAGE;
+ goto out_unlock;
+ default:
+ retval = VM_FAULT_SIGBUS;
+ goto out_unlock;
+ }
+ }
+
+ /*
+ * Wait for buffer data in transit, due to a pipelined
+ * move.
+ */
+ ret = ttm_bo_vm_fault_idle(bo, vma, vmf);
+ if (unlikely(ret != 0)) {
+ retval = ret;
+ goto out_unlock;
+ }
+
+ ret = ttm_mem_io_lock(man, true);
+ if (unlikely(ret != 0)) {
+ retval = VM_FAULT_NOPAGE;
+ goto out_unlock;
+ }
+ ret = ttm_mem_io_reserve_vm(bo);
+ if (unlikely(ret != 0)) {
+ retval = VM_FAULT_SIGBUS;
+ goto out_io_unlock;
+ }
+
+ page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
+ vma->vm_pgoff - drm_vma_node_start(&bo->vma_node);
+ page_last = vma_pages(vma) + vma->vm_pgoff -
+ drm_vma_node_start(&bo->vma_node);
+
+ if (unlikely(page_offset >= bo->num_pages)) {
+ retval = VM_FAULT_SIGBUS;
+ goto out_io_unlock;
+ }
+
+ /*
+ * Make a local vma copy to modify the page_prot member
+ * and vm_flags if necessary. The vma parameter is protected
+ * by mmap_sem in write mode.
+ */
+ cvma = *vma;
+ cvma.vm_page_prot = vm_get_page_prot(cvma.vm_flags);
+
+ if (bo->mem.bus.is_iomem) {
+ cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
+ cvma.vm_page_prot);
+ } else {
+ ttm = bo->ttm;
+ cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
+ cvma.vm_page_prot);
+
+ /* Allocate all page at once, most common usage */
+ if (ttm->bdev->driver->ttm_tt_populate(ttm)) {
+ retval = VM_FAULT_OOM;
+ goto out_io_unlock;
+ }
+ }
+
+ /*
+ * Speculatively prefault a number of pages. Only error on
+ * first page.
+ */
+ for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
+ if (bo->mem.bus.is_iomem)
+ pfn = ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT) + page_offset;
+ else {
+ page = ttm->pages[page_offset];
+ if (unlikely(!page && i == 0)) {
+ retval = VM_FAULT_OOM;
+ goto out_io_unlock;
+ } else if (unlikely(!page)) {
+ break;
+ }
+ page->mapping = vma->vm_file->f_mapping;
+ page->index = drm_vma_node_start(&bo->vma_node) +
+ page_offset;
+ pfn = page_to_pfn(page);
+ }
+
+ if (vma->vm_flags & VM_MIXEDMAP)
+ ret = vm_insert_mixed(&cvma, address, pfn);
+ else
+ ret = vm_insert_pfn(&cvma, address, pfn);
+
+ /*
+ * Somebody beat us to this PTE or prefaulting to
+ * an already populated PTE, or prefaulting error.
+ */
+
+ if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
+ break;
+ else if (unlikely(ret != 0)) {
+ retval =
+ (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
+ goto out_io_unlock;
+ }
+
+ address += PAGE_SIZE;
+ if (unlikely(++page_offset >= page_last))
+ break;
+ }
+out_io_unlock:
+ ttm_mem_io_unlock(man);
+out_unlock:
+ ttm_bo_unreserve(bo);
+ return retval;
+}
+
+static void ttm_bo_vm_open(struct vm_area_struct *vma)
+{
+ struct ttm_buffer_object *bo =
+ (struct ttm_buffer_object *)vma->vm_private_data;
+
+ WARN_ON(bo->bdev->dev_mapping != vma->vm_file->f_mapping);
+
+ (void)ttm_bo_reference(bo);
+}
+
+static void ttm_bo_vm_close(struct vm_area_struct *vma)
+{
+ struct ttm_buffer_object *bo = (struct ttm_buffer_object *)vma->vm_private_data;
+
+ ttm_bo_unref(&bo);
+ vma->vm_private_data = NULL;
+}
+
+static const struct vm_operations_struct ttm_bo_vm_ops = {
+ .fault = ttm_bo_vm_fault,
+ .open = ttm_bo_vm_open,
+ .close = ttm_bo_vm_close
+};
+
+static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
+ unsigned long offset,
+ unsigned long pages)
+{
+ struct drm_vma_offset_node *node;
+ struct ttm_buffer_object *bo = NULL;
+
+ drm_vma_offset_lock_lookup(&bdev->vma_manager);
+
+ node = drm_vma_offset_lookup_locked(&bdev->vma_manager, offset, pages);
+ if (likely(node)) {
+ bo = container_of(node, struct ttm_buffer_object, vma_node);
+ if (!kref_get_unless_zero(&bo->kref))
+ bo = NULL;
+ }
+
+ drm_vma_offset_unlock_lookup(&bdev->vma_manager);
+
+ if (!bo)
+ pr_err("Could not find buffer object to map\n");
+
+ return bo;
+}
+
+int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
+ struct ttm_bo_device *bdev)
+{
+ struct ttm_bo_driver *driver;
+ struct ttm_buffer_object *bo;
+ int ret;
+
+ bo = ttm_bo_vm_lookup(bdev, vma->vm_pgoff, vma_pages(vma));
+ if (unlikely(!bo))
+ return -EINVAL;
+
+ driver = bo->bdev->driver;
+ if (unlikely(!driver->verify_access)) {
+ ret = -EPERM;
+ goto out_unref;
+ }
+ ret = driver->verify_access(bo, filp);
+ if (unlikely(ret != 0))
+ goto out_unref;
+
+ vma->vm_ops = &ttm_bo_vm_ops;
+
+ /*
+ * Note: We're transferring the bo reference to
+ * vma->vm_private_data here.
+ */
+
+ vma->vm_private_data = bo;
+
+ /*
+ * We'd like to use VM_PFNMAP on shared mappings, where
+ * (vma->vm_flags & VM_SHARED) != 0, for performance reasons,
+ * but for some reason VM_PFNMAP + x86 PAT + write-combine is very
+ * bad for performance. Until that has been sorted out, use
+ * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719
+ */
+ vma->vm_flags |= VM_MIXEDMAP;
+ vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
+ return 0;
+out_unref:
+ ttm_bo_unref(&bo);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_mmap);
+
+int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo)
+{
+ if (vma->vm_pgoff != 0)
+ return -EACCES;
+
+ vma->vm_ops = &ttm_bo_vm_ops;
+ vma->vm_private_data = ttm_bo_reference(bo);
+ vma->vm_flags |= VM_MIXEDMAP;
+ vma->vm_flags |= VM_IO | VM_DONTEXPAND;
+ return 0;
+}
+EXPORT_SYMBOL(ttm_fbdev_mmap);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_execbuf_util.c b/kernel/drivers/gpu/drm/ttm/ttm_execbuf_util.c
new file mode 100644
index 000000000..3820ae97a
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_execbuf_util.c
@@ -0,0 +1,214 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+
+#include <drm/ttm/ttm_execbuf_util.h>
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_placement.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+
+static void ttm_eu_backoff_reservation_reverse(struct list_head *list,
+ struct ttm_validate_buffer *entry)
+{
+ list_for_each_entry_continue_reverse(entry, list, head) {
+ struct ttm_buffer_object *bo = entry->bo;
+
+ __ttm_bo_unreserve(bo);
+ }
+}
+
+static void ttm_eu_del_from_lru_locked(struct list_head *list)
+{
+ struct ttm_validate_buffer *entry;
+
+ list_for_each_entry(entry, list, head) {
+ struct ttm_buffer_object *bo = entry->bo;
+ unsigned put_count = ttm_bo_del_from_lru(bo);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+ }
+}
+
+void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
+ struct list_head *list)
+{
+ struct ttm_validate_buffer *entry;
+ struct ttm_bo_global *glob;
+
+ if (list_empty(list))
+ return;
+
+ entry = list_first_entry(list, struct ttm_validate_buffer, head);
+ glob = entry->bo->glob;
+
+ spin_lock(&glob->lru_lock);
+ list_for_each_entry(entry, list, head) {
+ struct ttm_buffer_object *bo = entry->bo;
+
+ ttm_bo_add_to_lru(bo);
+ __ttm_bo_unreserve(bo);
+ }
+ spin_unlock(&glob->lru_lock);
+
+ if (ticket)
+ ww_acquire_fini(ticket);
+}
+EXPORT_SYMBOL(ttm_eu_backoff_reservation);
+
+/*
+ * Reserve buffers for validation.
+ *
+ * If a buffer in the list is marked for CPU access, we back off and
+ * wait for that buffer to become free for GPU access.
+ *
+ * If a buffer is reserved for another validation, the validator with
+ * the highest validation sequence backs off and waits for that buffer
+ * to become unreserved. This prevents deadlocks when validating multiple
+ * buffers in different orders.
+ */
+
+int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
+ struct list_head *list, bool intr,
+ struct list_head *dups)
+{
+ struct ttm_bo_global *glob;
+ struct ttm_validate_buffer *entry;
+ int ret;
+
+ if (list_empty(list))
+ return 0;
+
+ entry = list_first_entry(list, struct ttm_validate_buffer, head);
+ glob = entry->bo->glob;
+
+ if (ticket)
+ ww_acquire_init(ticket, &reservation_ww_class);
+
+ list_for_each_entry(entry, list, head) {
+ struct ttm_buffer_object *bo = entry->bo;
+
+ ret = __ttm_bo_reserve(bo, intr, (ticket == NULL), true,
+ ticket);
+ if (!ret && unlikely(atomic_read(&bo->cpu_writers) > 0)) {
+ __ttm_bo_unreserve(bo);
+
+ ret = -EBUSY;
+
+ } else if (ret == -EALREADY && dups) {
+ struct ttm_validate_buffer *safe = entry;
+ entry = list_prev_entry(entry, head);
+ list_del(&safe->head);
+ list_add(&safe->head, dups);
+ continue;
+ }
+
+ if (!ret) {
+ if (!entry->shared)
+ continue;
+
+ ret = reservation_object_reserve_shared(bo->resv);
+ if (!ret)
+ continue;
+ }
+
+ /* uh oh, we lost out, drop every reservation and try
+ * to only reserve this buffer, then start over if
+ * this succeeds.
+ */
+ ttm_eu_backoff_reservation_reverse(list, entry);
+
+ if (ret == -EDEADLK && intr) {
+ ret = ww_mutex_lock_slow_interruptible(&bo->resv->lock,
+ ticket);
+ } else if (ret == -EDEADLK) {
+ ww_mutex_lock_slow(&bo->resv->lock, ticket);
+ ret = 0;
+ }
+
+ if (!ret && entry->shared)
+ ret = reservation_object_reserve_shared(bo->resv);
+
+ if (unlikely(ret != 0)) {
+ if (ret == -EINTR)
+ ret = -ERESTARTSYS;
+ if (ticket) {
+ ww_acquire_done(ticket);
+ ww_acquire_fini(ticket);
+ }
+ return ret;
+ }
+
+ /* move this item to the front of the list,
+ * forces correct iteration of the loop without keeping track
+ */
+ list_del(&entry->head);
+ list_add(&entry->head, list);
+ }
+
+ if (ticket)
+ ww_acquire_done(ticket);
+ spin_lock(&glob->lru_lock);
+ ttm_eu_del_from_lru_locked(list);
+ spin_unlock(&glob->lru_lock);
+ return 0;
+}
+EXPORT_SYMBOL(ttm_eu_reserve_buffers);
+
+void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
+ struct list_head *list, struct fence *fence)
+{
+ struct ttm_validate_buffer *entry;
+ struct ttm_buffer_object *bo;
+ struct ttm_bo_global *glob;
+ struct ttm_bo_device *bdev;
+ struct ttm_bo_driver *driver;
+
+ if (list_empty(list))
+ return;
+
+ bo = list_first_entry(list, struct ttm_validate_buffer, head)->bo;
+ bdev = bo->bdev;
+ driver = bdev->driver;
+ glob = bo->glob;
+
+ spin_lock(&glob->lru_lock);
+
+ list_for_each_entry(entry, list, head) {
+ bo = entry->bo;
+ if (entry->shared)
+ reservation_object_add_shared_fence(bo->resv, fence);
+ else
+ reservation_object_add_excl_fence(bo->resv, fence);
+ ttm_bo_add_to_lru(bo);
+ __ttm_bo_unreserve(bo);
+ }
+ spin_unlock(&glob->lru_lock);
+ if (ticket)
+ ww_acquire_fini(ticket);
+}
+EXPORT_SYMBOL(ttm_eu_fence_buffer_objects);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_lock.c b/kernel/drivers/gpu/drm/ttm/ttm_lock.c
new file mode 100644
index 000000000..6a9545447
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_lock.c
@@ -0,0 +1,302 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#include <drm/ttm/ttm_lock.h>
+#include <drm/ttm/ttm_module.h>
+#include <linux/atomic.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+
+#define TTM_WRITE_LOCK_PENDING (1 << 0)
+#define TTM_VT_LOCK_PENDING (1 << 1)
+#define TTM_SUSPEND_LOCK_PENDING (1 << 2)
+#define TTM_VT_LOCK (1 << 3)
+#define TTM_SUSPEND_LOCK (1 << 4)
+
+void ttm_lock_init(struct ttm_lock *lock)
+{
+ spin_lock_init(&lock->lock);
+ init_waitqueue_head(&lock->queue);
+ lock->rw = 0;
+ lock->flags = 0;
+ lock->kill_takers = false;
+ lock->signal = SIGKILL;
+}
+EXPORT_SYMBOL(ttm_lock_init);
+
+void ttm_read_unlock(struct ttm_lock *lock)
+{
+ spin_lock(&lock->lock);
+ if (--lock->rw == 0)
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+}
+EXPORT_SYMBOL(ttm_read_unlock);
+
+static bool __ttm_read_lock(struct ttm_lock *lock)
+{
+ bool locked = false;
+
+ spin_lock(&lock->lock);
+ if (unlikely(lock->kill_takers)) {
+ send_sig(lock->signal, current, 0);
+ spin_unlock(&lock->lock);
+ return false;
+ }
+ if (lock->rw >= 0 && lock->flags == 0) {
+ ++lock->rw;
+ locked = true;
+ }
+ spin_unlock(&lock->lock);
+ return locked;
+}
+
+int ttm_read_lock(struct ttm_lock *lock, bool interruptible)
+{
+ int ret = 0;
+
+ if (interruptible)
+ ret = wait_event_interruptible(lock->queue,
+ __ttm_read_lock(lock));
+ else
+ wait_event(lock->queue, __ttm_read_lock(lock));
+ return ret;
+}
+EXPORT_SYMBOL(ttm_read_lock);
+
+static bool __ttm_read_trylock(struct ttm_lock *lock, bool *locked)
+{
+ bool block = true;
+
+ *locked = false;
+
+ spin_lock(&lock->lock);
+ if (unlikely(lock->kill_takers)) {
+ send_sig(lock->signal, current, 0);
+ spin_unlock(&lock->lock);
+ return false;
+ }
+ if (lock->rw >= 0 && lock->flags == 0) {
+ ++lock->rw;
+ block = false;
+ *locked = true;
+ } else if (lock->flags == 0) {
+ block = false;
+ }
+ spin_unlock(&lock->lock);
+
+ return !block;
+}
+
+int ttm_read_trylock(struct ttm_lock *lock, bool interruptible)
+{
+ int ret = 0;
+ bool locked;
+
+ if (interruptible)
+ ret = wait_event_interruptible
+ (lock->queue, __ttm_read_trylock(lock, &locked));
+ else
+ wait_event(lock->queue, __ttm_read_trylock(lock, &locked));
+
+ if (unlikely(ret != 0)) {
+ BUG_ON(locked);
+ return ret;
+ }
+
+ return (locked) ? 0 : -EBUSY;
+}
+
+void ttm_write_unlock(struct ttm_lock *lock)
+{
+ spin_lock(&lock->lock);
+ lock->rw = 0;
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+}
+EXPORT_SYMBOL(ttm_write_unlock);
+
+static bool __ttm_write_lock(struct ttm_lock *lock)
+{
+ bool locked = false;
+
+ spin_lock(&lock->lock);
+ if (unlikely(lock->kill_takers)) {
+ send_sig(lock->signal, current, 0);
+ spin_unlock(&lock->lock);
+ return false;
+ }
+ if (lock->rw == 0 && ((lock->flags & ~TTM_WRITE_LOCK_PENDING) == 0)) {
+ lock->rw = -1;
+ lock->flags &= ~TTM_WRITE_LOCK_PENDING;
+ locked = true;
+ } else {
+ lock->flags |= TTM_WRITE_LOCK_PENDING;
+ }
+ spin_unlock(&lock->lock);
+ return locked;
+}
+
+int ttm_write_lock(struct ttm_lock *lock, bool interruptible)
+{
+ int ret = 0;
+
+ if (interruptible) {
+ ret = wait_event_interruptible(lock->queue,
+ __ttm_write_lock(lock));
+ if (unlikely(ret != 0)) {
+ spin_lock(&lock->lock);
+ lock->flags &= ~TTM_WRITE_LOCK_PENDING;
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+ }
+ } else
+ wait_event(lock->queue, __ttm_read_lock(lock));
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_write_lock);
+
+static int __ttm_vt_unlock(struct ttm_lock *lock)
+{
+ int ret = 0;
+
+ spin_lock(&lock->lock);
+ if (unlikely(!(lock->flags & TTM_VT_LOCK)))
+ ret = -EINVAL;
+ lock->flags &= ~TTM_VT_LOCK;
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+
+ return ret;
+}
+
+static void ttm_vt_lock_remove(struct ttm_base_object **p_base)
+{
+ struct ttm_base_object *base = *p_base;
+ struct ttm_lock *lock = container_of(base, struct ttm_lock, base);
+ int ret;
+
+ *p_base = NULL;
+ ret = __ttm_vt_unlock(lock);
+ BUG_ON(ret != 0);
+}
+
+static bool __ttm_vt_lock(struct ttm_lock *lock)
+{
+ bool locked = false;
+
+ spin_lock(&lock->lock);
+ if (lock->rw == 0) {
+ lock->flags &= ~TTM_VT_LOCK_PENDING;
+ lock->flags |= TTM_VT_LOCK;
+ locked = true;
+ } else {
+ lock->flags |= TTM_VT_LOCK_PENDING;
+ }
+ spin_unlock(&lock->lock);
+ return locked;
+}
+
+int ttm_vt_lock(struct ttm_lock *lock,
+ bool interruptible,
+ struct ttm_object_file *tfile)
+{
+ int ret = 0;
+
+ if (interruptible) {
+ ret = wait_event_interruptible(lock->queue,
+ __ttm_vt_lock(lock));
+ if (unlikely(ret != 0)) {
+ spin_lock(&lock->lock);
+ lock->flags &= ~TTM_VT_LOCK_PENDING;
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+ return ret;
+ }
+ } else
+ wait_event(lock->queue, __ttm_vt_lock(lock));
+
+ /*
+ * Add a base-object, the destructor of which will
+ * make sure the lock is released if the client dies
+ * while holding it.
+ */
+
+ ret = ttm_base_object_init(tfile, &lock->base, false,
+ ttm_lock_type, &ttm_vt_lock_remove, NULL);
+ if (ret)
+ (void)__ttm_vt_unlock(lock);
+ else
+ lock->vt_holder = tfile;
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_vt_lock);
+
+int ttm_vt_unlock(struct ttm_lock *lock)
+{
+ return ttm_ref_object_base_unref(lock->vt_holder,
+ lock->base.hash.key, TTM_REF_USAGE);
+}
+EXPORT_SYMBOL(ttm_vt_unlock);
+
+void ttm_suspend_unlock(struct ttm_lock *lock)
+{
+ spin_lock(&lock->lock);
+ lock->flags &= ~TTM_SUSPEND_LOCK;
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+}
+EXPORT_SYMBOL(ttm_suspend_unlock);
+
+static bool __ttm_suspend_lock(struct ttm_lock *lock)
+{
+ bool locked = false;
+
+ spin_lock(&lock->lock);
+ if (lock->rw == 0) {
+ lock->flags &= ~TTM_SUSPEND_LOCK_PENDING;
+ lock->flags |= TTM_SUSPEND_LOCK;
+ locked = true;
+ } else {
+ lock->flags |= TTM_SUSPEND_LOCK_PENDING;
+ }
+ spin_unlock(&lock->lock);
+ return locked;
+}
+
+void ttm_suspend_lock(struct ttm_lock *lock)
+{
+ wait_event(lock->queue, __ttm_suspend_lock(lock));
+}
+EXPORT_SYMBOL(ttm_suspend_lock);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_memory.c b/kernel/drivers/gpu/drm/ttm/ttm_memory.c
new file mode 100644
index 000000000..a1803fbcc
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_memory.c
@@ -0,0 +1,602 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <drm/ttm/ttm_memory.h>
+#include <drm/ttm/ttm_module.h>
+#include <drm/ttm/ttm_page_alloc.h>
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#define TTM_MEMORY_ALLOC_RETRIES 4
+
+struct ttm_mem_zone {
+ struct kobject kobj;
+ struct ttm_mem_global *glob;
+ const char *name;
+ uint64_t zone_mem;
+ uint64_t emer_mem;
+ uint64_t max_mem;
+ uint64_t swap_limit;
+ uint64_t used_mem;
+};
+
+static struct attribute ttm_mem_sys = {
+ .name = "zone_memory",
+ .mode = S_IRUGO
+};
+static struct attribute ttm_mem_emer = {
+ .name = "emergency_memory",
+ .mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_mem_max = {
+ .name = "available_memory",
+ .mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_mem_swap = {
+ .name = "swap_limit",
+ .mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_mem_used = {
+ .name = "used_memory",
+ .mode = S_IRUGO
+};
+
+static void ttm_mem_zone_kobj_release(struct kobject *kobj)
+{
+ struct ttm_mem_zone *zone =
+ container_of(kobj, struct ttm_mem_zone, kobj);
+
+ pr_info("Zone %7s: Used memory at exit: %llu kiB\n",
+ zone->name, (unsigned long long)zone->used_mem >> 10);
+ kfree(zone);
+}
+
+static ssize_t ttm_mem_zone_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buffer)
+{
+ struct ttm_mem_zone *zone =
+ container_of(kobj, struct ttm_mem_zone, kobj);
+ uint64_t val = 0;
+
+ spin_lock(&zone->glob->lock);
+ if (attr == &ttm_mem_sys)
+ val = zone->zone_mem;
+ else if (attr == &ttm_mem_emer)
+ val = zone->emer_mem;
+ else if (attr == &ttm_mem_max)
+ val = zone->max_mem;
+ else if (attr == &ttm_mem_swap)
+ val = zone->swap_limit;
+ else if (attr == &ttm_mem_used)
+ val = zone->used_mem;
+ spin_unlock(&zone->glob->lock);
+
+ return snprintf(buffer, PAGE_SIZE, "%llu\n",
+ (unsigned long long) val >> 10);
+}
+
+static void ttm_check_swapping(struct ttm_mem_global *glob);
+
+static ssize_t ttm_mem_zone_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer,
+ size_t size)
+{
+ struct ttm_mem_zone *zone =
+ container_of(kobj, struct ttm_mem_zone, kobj);
+ int chars;
+ unsigned long val;
+ uint64_t val64;
+
+ chars = sscanf(buffer, "%lu", &val);
+ if (chars == 0)
+ return size;
+
+ val64 = val;
+ val64 <<= 10;
+
+ spin_lock(&zone->glob->lock);
+ if (val64 > zone->zone_mem)
+ val64 = zone->zone_mem;
+ if (attr == &ttm_mem_emer) {
+ zone->emer_mem = val64;
+ if (zone->max_mem > val64)
+ zone->max_mem = val64;
+ } else if (attr == &ttm_mem_max) {
+ zone->max_mem = val64;
+ if (zone->emer_mem < val64)
+ zone->emer_mem = val64;
+ } else if (attr == &ttm_mem_swap)
+ zone->swap_limit = val64;
+ spin_unlock(&zone->glob->lock);
+
+ ttm_check_swapping(zone->glob);
+
+ return size;
+}
+
+static struct attribute *ttm_mem_zone_attrs[] = {
+ &ttm_mem_sys,
+ &ttm_mem_emer,
+ &ttm_mem_max,
+ &ttm_mem_swap,
+ &ttm_mem_used,
+ NULL
+};
+
+static const struct sysfs_ops ttm_mem_zone_ops = {
+ .show = &ttm_mem_zone_show,
+ .store = &ttm_mem_zone_store
+};
+
+static struct kobj_type ttm_mem_zone_kobj_type = {
+ .release = &ttm_mem_zone_kobj_release,
+ .sysfs_ops = &ttm_mem_zone_ops,
+ .default_attrs = ttm_mem_zone_attrs,
+};
+
+static void ttm_mem_global_kobj_release(struct kobject *kobj)
+{
+ struct ttm_mem_global *glob =
+ container_of(kobj, struct ttm_mem_global, kobj);
+
+ kfree(glob);
+}
+
+static struct kobj_type ttm_mem_glob_kobj_type = {
+ .release = &ttm_mem_global_kobj_release,
+};
+
+static bool ttm_zones_above_swap_target(struct ttm_mem_global *glob,
+ bool from_wq, uint64_t extra)
+{
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+ uint64_t target;
+
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+
+ if (from_wq)
+ target = zone->swap_limit;
+ else if (capable(CAP_SYS_ADMIN))
+ target = zone->emer_mem;
+ else
+ target = zone->max_mem;
+
+ target = (extra > target) ? 0ULL : target;
+
+ if (zone->used_mem > target)
+ return true;
+ }
+ return false;
+}
+
+/**
+ * At this point we only support a single shrink callback.
+ * Extend this if needed, perhaps using a linked list of callbacks.
+ * Note that this function is reentrant:
+ * many threads may try to swap out at any given time.
+ */
+
+static void ttm_shrink(struct ttm_mem_global *glob, bool from_wq,
+ uint64_t extra)
+{
+ int ret;
+ struct ttm_mem_shrink *shrink;
+
+ spin_lock(&glob->lock);
+ if (glob->shrink == NULL)
+ goto out;
+
+ while (ttm_zones_above_swap_target(glob, from_wq, extra)) {
+ shrink = glob->shrink;
+ spin_unlock(&glob->lock);
+ ret = shrink->do_shrink(shrink);
+ spin_lock(&glob->lock);
+ if (unlikely(ret != 0))
+ goto out;
+ }
+out:
+ spin_unlock(&glob->lock);
+}
+
+
+
+static void ttm_shrink_work(struct work_struct *work)
+{
+ struct ttm_mem_global *glob =
+ container_of(work, struct ttm_mem_global, work);
+
+ ttm_shrink(glob, true, 0ULL);
+}
+
+static int ttm_mem_init_kernel_zone(struct ttm_mem_global *glob,
+ const struct sysinfo *si)
+{
+ struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL);
+ uint64_t mem;
+ int ret;
+
+ if (unlikely(!zone))
+ return -ENOMEM;
+
+ mem = si->totalram - si->totalhigh;
+ mem *= si->mem_unit;
+
+ zone->name = "kernel";
+ zone->zone_mem = mem;
+ zone->max_mem = mem >> 1;
+ zone->emer_mem = (mem >> 1) + (mem >> 2);
+ zone->swap_limit = zone->max_mem - (mem >> 3);
+ zone->used_mem = 0;
+ zone->glob = glob;
+ glob->zone_kernel = zone;
+ ret = kobject_init_and_add(
+ &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
+ if (unlikely(ret != 0)) {
+ kobject_put(&zone->kobj);
+ return ret;
+ }
+ glob->zones[glob->num_zones++] = zone;
+ return 0;
+}
+
+#ifdef CONFIG_HIGHMEM
+static int ttm_mem_init_highmem_zone(struct ttm_mem_global *glob,
+ const struct sysinfo *si)
+{
+ struct ttm_mem_zone *zone;
+ uint64_t mem;
+ int ret;
+
+ if (si->totalhigh == 0)
+ return 0;
+
+ zone = kzalloc(sizeof(*zone), GFP_KERNEL);
+ if (unlikely(!zone))
+ return -ENOMEM;
+
+ mem = si->totalram;
+ mem *= si->mem_unit;
+
+ zone->name = "highmem";
+ zone->zone_mem = mem;
+ zone->max_mem = mem >> 1;
+ zone->emer_mem = (mem >> 1) + (mem >> 2);
+ zone->swap_limit = zone->max_mem - (mem >> 3);
+ zone->used_mem = 0;
+ zone->glob = glob;
+ glob->zone_highmem = zone;
+ ret = kobject_init_and_add(
+ &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, "%s",
+ zone->name);
+ if (unlikely(ret != 0)) {
+ kobject_put(&zone->kobj);
+ return ret;
+ }
+ glob->zones[glob->num_zones++] = zone;
+ return 0;
+}
+#else
+static int ttm_mem_init_dma32_zone(struct ttm_mem_global *glob,
+ const struct sysinfo *si)
+{
+ struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL);
+ uint64_t mem;
+ int ret;
+
+ if (unlikely(!zone))
+ return -ENOMEM;
+
+ mem = si->totalram;
+ mem *= si->mem_unit;
+
+ /**
+ * No special dma32 zone needed.
+ */
+
+ if (mem <= ((uint64_t) 1ULL << 32)) {
+ kfree(zone);
+ return 0;
+ }
+
+ /*
+ * Limit max dma32 memory to 4GB for now
+ * until we can figure out how big this
+ * zone really is.
+ */
+
+ mem = ((uint64_t) 1ULL << 32);
+ zone->name = "dma32";
+ zone->zone_mem = mem;
+ zone->max_mem = mem >> 1;
+ zone->emer_mem = (mem >> 1) + (mem >> 2);
+ zone->swap_limit = zone->max_mem - (mem >> 3);
+ zone->used_mem = 0;
+ zone->glob = glob;
+ glob->zone_dma32 = zone;
+ ret = kobject_init_and_add(
+ &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
+ if (unlikely(ret != 0)) {
+ kobject_put(&zone->kobj);
+ return ret;
+ }
+ glob->zones[glob->num_zones++] = zone;
+ return 0;
+}
+#endif
+
+int ttm_mem_global_init(struct ttm_mem_global *glob)
+{
+ struct sysinfo si;
+ int ret;
+ int i;
+ struct ttm_mem_zone *zone;
+
+ spin_lock_init(&glob->lock);
+ glob->swap_queue = create_singlethread_workqueue("ttm_swap");
+ INIT_WORK(&glob->work, ttm_shrink_work);
+ ret = kobject_init_and_add(
+ &glob->kobj, &ttm_mem_glob_kobj_type, ttm_get_kobj(), "memory_accounting");
+ if (unlikely(ret != 0)) {
+ kobject_put(&glob->kobj);
+ return ret;
+ }
+
+ si_meminfo(&si);
+
+ ret = ttm_mem_init_kernel_zone(glob, &si);
+ if (unlikely(ret != 0))
+ goto out_no_zone;
+#ifdef CONFIG_HIGHMEM
+ ret = ttm_mem_init_highmem_zone(glob, &si);
+ if (unlikely(ret != 0))
+ goto out_no_zone;
+#else
+ ret = ttm_mem_init_dma32_zone(glob, &si);
+ if (unlikely(ret != 0))
+ goto out_no_zone;
+#endif
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ pr_info("Zone %7s: Available graphics memory: %llu kiB\n",
+ zone->name, (unsigned long long)zone->max_mem >> 10);
+ }
+ ttm_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
+ ttm_dma_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
+ return 0;
+out_no_zone:
+ ttm_mem_global_release(glob);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_mem_global_init);
+
+void ttm_mem_global_release(struct ttm_mem_global *glob)
+{
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ /* let the page allocator first stop the shrink work. */
+ ttm_page_alloc_fini();
+ ttm_dma_page_alloc_fini();
+
+ flush_workqueue(glob->swap_queue);
+ destroy_workqueue(glob->swap_queue);
+ glob->swap_queue = NULL;
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ kobject_del(&zone->kobj);
+ kobject_put(&zone->kobj);
+ }
+ kobject_del(&glob->kobj);
+ kobject_put(&glob->kobj);
+}
+EXPORT_SYMBOL(ttm_mem_global_release);
+
+static void ttm_check_swapping(struct ttm_mem_global *glob)
+{
+ bool needs_swapping = false;
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ spin_lock(&glob->lock);
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (zone->used_mem > zone->swap_limit) {
+ needs_swapping = true;
+ break;
+ }
+ }
+
+ spin_unlock(&glob->lock);
+
+ if (unlikely(needs_swapping))
+ (void)queue_work(glob->swap_queue, &glob->work);
+
+}
+
+static void ttm_mem_global_free_zone(struct ttm_mem_global *glob,
+ struct ttm_mem_zone *single_zone,
+ uint64_t amount)
+{
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ spin_lock(&glob->lock);
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (single_zone && zone != single_zone)
+ continue;
+ zone->used_mem -= amount;
+ }
+ spin_unlock(&glob->lock);
+}
+
+void ttm_mem_global_free(struct ttm_mem_global *glob,
+ uint64_t amount)
+{
+ return ttm_mem_global_free_zone(glob, NULL, amount);
+}
+EXPORT_SYMBOL(ttm_mem_global_free);
+
+static int ttm_mem_global_reserve(struct ttm_mem_global *glob,
+ struct ttm_mem_zone *single_zone,
+ uint64_t amount, bool reserve)
+{
+ uint64_t limit;
+ int ret = -ENOMEM;
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ spin_lock(&glob->lock);
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (single_zone && zone != single_zone)
+ continue;
+
+ limit = (capable(CAP_SYS_ADMIN)) ?
+ zone->emer_mem : zone->max_mem;
+
+ if (zone->used_mem > limit)
+ goto out_unlock;
+ }
+
+ if (reserve) {
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (single_zone && zone != single_zone)
+ continue;
+ zone->used_mem += amount;
+ }
+ }
+
+ ret = 0;
+out_unlock:
+ spin_unlock(&glob->lock);
+ ttm_check_swapping(glob);
+
+ return ret;
+}
+
+
+static int ttm_mem_global_alloc_zone(struct ttm_mem_global *glob,
+ struct ttm_mem_zone *single_zone,
+ uint64_t memory,
+ bool no_wait, bool interruptible)
+{
+ int count = TTM_MEMORY_ALLOC_RETRIES;
+
+ while (unlikely(ttm_mem_global_reserve(glob,
+ single_zone,
+ memory, true)
+ != 0)) {
+ if (no_wait)
+ return -ENOMEM;
+ if (unlikely(count-- == 0))
+ return -ENOMEM;
+ ttm_shrink(glob, false, memory + (memory >> 2) + 16);
+ }
+
+ return 0;
+}
+
+int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
+ bool no_wait, bool interruptible)
+{
+ /**
+ * Normal allocations of kernel memory are registered in
+ * all zones.
+ */
+
+ return ttm_mem_global_alloc_zone(glob, NULL, memory, no_wait,
+ interruptible);
+}
+EXPORT_SYMBOL(ttm_mem_global_alloc);
+
+int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
+ struct page *page,
+ bool no_wait, bool interruptible)
+{
+
+ struct ttm_mem_zone *zone = NULL;
+
+ /**
+ * Page allocations may be registed in a single zone
+ * only if highmem or !dma32.
+ */
+
+#ifdef CONFIG_HIGHMEM
+ if (PageHighMem(page) && glob->zone_highmem != NULL)
+ zone = glob->zone_highmem;
+#else
+ if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
+ zone = glob->zone_kernel;
+#endif
+ return ttm_mem_global_alloc_zone(glob, zone, PAGE_SIZE, no_wait,
+ interruptible);
+}
+
+void ttm_mem_global_free_page(struct ttm_mem_global *glob, struct page *page)
+{
+ struct ttm_mem_zone *zone = NULL;
+
+#ifdef CONFIG_HIGHMEM
+ if (PageHighMem(page) && glob->zone_highmem != NULL)
+ zone = glob->zone_highmem;
+#else
+ if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
+ zone = glob->zone_kernel;
+#endif
+ ttm_mem_global_free_zone(glob, zone, PAGE_SIZE);
+}
+
+
+size_t ttm_round_pot(size_t size)
+{
+ if ((size & (size - 1)) == 0)
+ return size;
+ else if (size > PAGE_SIZE)
+ return PAGE_ALIGN(size);
+ else {
+ size_t tmp_size = 4;
+
+ while (tmp_size < size)
+ tmp_size <<= 1;
+
+ return tmp_size;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_round_pot);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_module.c b/kernel/drivers/gpu/drm/ttm/ttm_module.c
new file mode 100644
index 000000000..66fc6395e
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_module.c
@@ -0,0 +1,102 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ * Jerome Glisse
+ */
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/sched.h>
+#include <drm/ttm/ttm_module.h>
+#include <drm/drm_sysfs.h>
+
+static DECLARE_WAIT_QUEUE_HEAD(exit_q);
+static atomic_t device_released;
+
+static struct device_type ttm_drm_class_type = {
+ .name = "ttm",
+ /**
+ * Add pm ops here.
+ */
+};
+
+static void ttm_drm_class_device_release(struct device *dev)
+{
+ atomic_set(&device_released, 1);
+ wake_up_all(&exit_q);
+}
+
+static struct device ttm_drm_class_device = {
+ .type = &ttm_drm_class_type,
+ .release = &ttm_drm_class_device_release
+};
+
+struct kobject *ttm_get_kobj(void)
+{
+ struct kobject *kobj = &ttm_drm_class_device.kobj;
+ BUG_ON(kobj == NULL);
+ return kobj;
+}
+
+static int __init ttm_init(void)
+{
+ int ret;
+
+ ret = dev_set_name(&ttm_drm_class_device, "ttm");
+ if (unlikely(ret != 0))
+ return ret;
+
+ atomic_set(&device_released, 0);
+ ret = drm_class_device_register(&ttm_drm_class_device);
+ if (unlikely(ret != 0))
+ goto out_no_dev_reg;
+
+ return 0;
+out_no_dev_reg:
+ atomic_set(&device_released, 1);
+ wake_up_all(&exit_q);
+ return ret;
+}
+
+static void __exit ttm_exit(void)
+{
+ drm_class_device_unregister(&ttm_drm_class_device);
+
+ /**
+ * Refuse to unload until the TTM device is released.
+ * Not sure this is 100% needed.
+ */
+
+ wait_event(exit_q, atomic_read(&device_released) == 1);
+}
+
+module_init(ttm_init);
+module_exit(ttm_exit);
+
+MODULE_AUTHOR("Thomas Hellstrom, Jerome Glisse");
+MODULE_DESCRIPTION("TTM memory manager subsystem (for DRM device)");
+MODULE_LICENSE("GPL and additional rights");
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_object.c b/kernel/drivers/gpu/drm/ttm/ttm_object.c
new file mode 100644
index 000000000..4f5fa8d65
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_object.c
@@ -0,0 +1,765 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2009-2013 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ *
+ * While no substantial code is shared, the prime code is inspired by
+ * drm_prime.c, with
+ * Authors:
+ * Dave Airlie <airlied@redhat.com>
+ * Rob Clark <rob.clark@linaro.org>
+ */
+/** @file ttm_ref_object.c
+ *
+ * Base- and reference object implementation for the various
+ * ttm objects. Implements reference counting, minimal security checks
+ * and release on file close.
+ */
+
+
+/**
+ * struct ttm_object_file
+ *
+ * @tdev: Pointer to the ttm_object_device.
+ *
+ * @lock: Lock that protects the ref_list list and the
+ * ref_hash hash tables.
+ *
+ * @ref_list: List of ttm_ref_objects to be destroyed at
+ * file release.
+ *
+ * @ref_hash: Hash tables of ref objects, one per ttm_ref_type,
+ * for fast lookup of ref objects given a base object.
+ */
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <drm/ttm/ttm_object.h>
+#include <drm/ttm/ttm_module.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/atomic.h>
+
+struct ttm_object_file {
+ struct ttm_object_device *tdev;
+ spinlock_t lock;
+ struct list_head ref_list;
+ struct drm_open_hash ref_hash[TTM_REF_NUM];
+ struct kref refcount;
+};
+
+/**
+ * struct ttm_object_device
+ *
+ * @object_lock: lock that protects the object_hash hash table.
+ *
+ * @object_hash: hash table for fast lookup of object global names.
+ *
+ * @object_count: Per device object count.
+ *
+ * This is the per-device data structure needed for ttm object management.
+ */
+
+struct ttm_object_device {
+ spinlock_t object_lock;
+ struct drm_open_hash object_hash;
+ atomic_t object_count;
+ struct ttm_mem_global *mem_glob;
+ struct dma_buf_ops ops;
+ void (*dmabuf_release)(struct dma_buf *dma_buf);
+ size_t dma_buf_size;
+};
+
+/**
+ * struct ttm_ref_object
+ *
+ * @hash: Hash entry for the per-file object reference hash.
+ *
+ * @head: List entry for the per-file list of ref-objects.
+ *
+ * @kref: Ref count.
+ *
+ * @obj: Base object this ref object is referencing.
+ *
+ * @ref_type: Type of ref object.
+ *
+ * This is similar to an idr object, but it also has a hash table entry
+ * that allows lookup with a pointer to the referenced object as a key. In
+ * that way, one can easily detect whether a base object is referenced by
+ * a particular ttm_object_file. It also carries a ref count to avoid creating
+ * multiple ref objects if a ttm_object_file references the same base
+ * object more than once.
+ */
+
+struct ttm_ref_object {
+ struct rcu_head rcu_head;
+ struct drm_hash_item hash;
+ struct list_head head;
+ struct kref kref;
+ enum ttm_ref_type ref_type;
+ struct ttm_base_object *obj;
+ struct ttm_object_file *tfile;
+};
+
+static void ttm_prime_dmabuf_release(struct dma_buf *dma_buf);
+
+static inline struct ttm_object_file *
+ttm_object_file_ref(struct ttm_object_file *tfile)
+{
+ kref_get(&tfile->refcount);
+ return tfile;
+}
+
+static void ttm_object_file_destroy(struct kref *kref)
+{
+ struct ttm_object_file *tfile =
+ container_of(kref, struct ttm_object_file, refcount);
+
+ kfree(tfile);
+}
+
+
+static inline void ttm_object_file_unref(struct ttm_object_file **p_tfile)
+{
+ struct ttm_object_file *tfile = *p_tfile;
+
+ *p_tfile = NULL;
+ kref_put(&tfile->refcount, ttm_object_file_destroy);
+}
+
+
+int ttm_base_object_init(struct ttm_object_file *tfile,
+ struct ttm_base_object *base,
+ bool shareable,
+ enum ttm_object_type object_type,
+ void (*refcount_release) (struct ttm_base_object **),
+ void (*ref_obj_release) (struct ttm_base_object *,
+ enum ttm_ref_type ref_type))
+{
+ struct ttm_object_device *tdev = tfile->tdev;
+ int ret;
+
+ base->shareable = shareable;
+ base->tfile = ttm_object_file_ref(tfile);
+ base->refcount_release = refcount_release;
+ base->ref_obj_release = ref_obj_release;
+ base->object_type = object_type;
+ kref_init(&base->refcount);
+ spin_lock(&tdev->object_lock);
+ ret = drm_ht_just_insert_please_rcu(&tdev->object_hash,
+ &base->hash,
+ (unsigned long)base, 31, 0, 0);
+ spin_unlock(&tdev->object_lock);
+ if (unlikely(ret != 0))
+ goto out_err0;
+
+ ret = ttm_ref_object_add(tfile, base, TTM_REF_USAGE, NULL);
+ if (unlikely(ret != 0))
+ goto out_err1;
+
+ ttm_base_object_unref(&base);
+
+ return 0;
+out_err1:
+ spin_lock(&tdev->object_lock);
+ (void)drm_ht_remove_item_rcu(&tdev->object_hash, &base->hash);
+ spin_unlock(&tdev->object_lock);
+out_err0:
+ return ret;
+}
+EXPORT_SYMBOL(ttm_base_object_init);
+
+static void ttm_release_base(struct kref *kref)
+{
+ struct ttm_base_object *base =
+ container_of(kref, struct ttm_base_object, refcount);
+ struct ttm_object_device *tdev = base->tfile->tdev;
+
+ spin_lock(&tdev->object_lock);
+ (void)drm_ht_remove_item_rcu(&tdev->object_hash, &base->hash);
+ spin_unlock(&tdev->object_lock);
+
+ /*
+ * Note: We don't use synchronize_rcu() here because it's far
+ * too slow. It's up to the user to free the object using
+ * call_rcu() or ttm_base_object_kfree().
+ */
+
+ ttm_object_file_unref(&base->tfile);
+ if (base->refcount_release)
+ base->refcount_release(&base);
+}
+
+void ttm_base_object_unref(struct ttm_base_object **p_base)
+{
+ struct ttm_base_object *base = *p_base;
+
+ *p_base = NULL;
+
+ kref_put(&base->refcount, ttm_release_base);
+}
+EXPORT_SYMBOL(ttm_base_object_unref);
+
+struct ttm_base_object *ttm_base_object_lookup(struct ttm_object_file *tfile,
+ uint32_t key)
+{
+ struct ttm_base_object *base = NULL;
+ struct drm_hash_item *hash;
+ struct drm_open_hash *ht = &tfile->ref_hash[TTM_REF_USAGE];
+ int ret;
+
+ rcu_read_lock();
+ ret = drm_ht_find_item_rcu(ht, key, &hash);
+
+ if (likely(ret == 0)) {
+ base = drm_hash_entry(hash, struct ttm_ref_object, hash)->obj;
+ if (!kref_get_unless_zero(&base->refcount))
+ base = NULL;
+ }
+ rcu_read_unlock();
+
+ return base;
+}
+EXPORT_SYMBOL(ttm_base_object_lookup);
+
+struct ttm_base_object *
+ttm_base_object_lookup_for_ref(struct ttm_object_device *tdev, uint32_t key)
+{
+ struct ttm_base_object *base = NULL;
+ struct drm_hash_item *hash;
+ struct drm_open_hash *ht = &tdev->object_hash;
+ int ret;
+
+ rcu_read_lock();
+ ret = drm_ht_find_item_rcu(ht, key, &hash);
+
+ if (likely(ret == 0)) {
+ base = drm_hash_entry(hash, struct ttm_base_object, hash);
+ if (!kref_get_unless_zero(&base->refcount))
+ base = NULL;
+ }
+ rcu_read_unlock();
+
+ return base;
+}
+EXPORT_SYMBOL(ttm_base_object_lookup_for_ref);
+
+/**
+ * ttm_ref_object_exists - Check whether a caller has a valid ref object
+ * (has opened) a base object.
+ *
+ * @tfile: Pointer to a struct ttm_object_file identifying the caller.
+ * @base: Pointer to a struct base object.
+ *
+ * Checks wether the caller identified by @tfile has put a valid USAGE
+ * reference object on the base object identified by @base.
+ */
+bool ttm_ref_object_exists(struct ttm_object_file *tfile,
+ struct ttm_base_object *base)
+{
+ struct drm_open_hash *ht = &tfile->ref_hash[TTM_REF_USAGE];
+ struct drm_hash_item *hash;
+ struct ttm_ref_object *ref;
+
+ rcu_read_lock();
+ if (unlikely(drm_ht_find_item_rcu(ht, base->hash.key, &hash) != 0))
+ goto out_false;
+
+ /*
+ * Verify that the ref object is really pointing to our base object.
+ * Our base object could actually be dead, and the ref object pointing
+ * to another base object with the same handle.
+ */
+ ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
+ if (unlikely(base != ref->obj))
+ goto out_false;
+
+ /*
+ * Verify that the ref->obj pointer was actually valid!
+ */
+ rmb();
+ if (unlikely(atomic_read(&ref->kref.refcount) == 0))
+ goto out_false;
+
+ rcu_read_unlock();
+ return true;
+
+ out_false:
+ rcu_read_unlock();
+ return false;
+}
+EXPORT_SYMBOL(ttm_ref_object_exists);
+
+int ttm_ref_object_add(struct ttm_object_file *tfile,
+ struct ttm_base_object *base,
+ enum ttm_ref_type ref_type, bool *existed)
+{
+ struct drm_open_hash *ht = &tfile->ref_hash[ref_type];
+ struct ttm_ref_object *ref;
+ struct drm_hash_item *hash;
+ struct ttm_mem_global *mem_glob = tfile->tdev->mem_glob;
+ int ret = -EINVAL;
+
+ if (base->tfile != tfile && !base->shareable)
+ return -EPERM;
+
+ if (existed != NULL)
+ *existed = true;
+
+ while (ret == -EINVAL) {
+ rcu_read_lock();
+ ret = drm_ht_find_item_rcu(ht, base->hash.key, &hash);
+
+ if (ret == 0) {
+ ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
+ if (kref_get_unless_zero(&ref->kref)) {
+ rcu_read_unlock();
+ break;
+ }
+ }
+
+ rcu_read_unlock();
+ ret = ttm_mem_global_alloc(mem_glob, sizeof(*ref),
+ false, false);
+ if (unlikely(ret != 0))
+ return ret;
+ ref = kmalloc(sizeof(*ref), GFP_KERNEL);
+ if (unlikely(ref == NULL)) {
+ ttm_mem_global_free(mem_glob, sizeof(*ref));
+ return -ENOMEM;
+ }
+
+ ref->hash.key = base->hash.key;
+ ref->obj = base;
+ ref->tfile = tfile;
+ ref->ref_type = ref_type;
+ kref_init(&ref->kref);
+
+ spin_lock(&tfile->lock);
+ ret = drm_ht_insert_item_rcu(ht, &ref->hash);
+
+ if (likely(ret == 0)) {
+ list_add_tail(&ref->head, &tfile->ref_list);
+ kref_get(&base->refcount);
+ spin_unlock(&tfile->lock);
+ if (existed != NULL)
+ *existed = false;
+ break;
+ }
+
+ spin_unlock(&tfile->lock);
+ BUG_ON(ret != -EINVAL);
+
+ ttm_mem_global_free(mem_glob, sizeof(*ref));
+ kfree(ref);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_ref_object_add);
+
+static void ttm_ref_object_release(struct kref *kref)
+{
+ struct ttm_ref_object *ref =
+ container_of(kref, struct ttm_ref_object, kref);
+ struct ttm_base_object *base = ref->obj;
+ struct ttm_object_file *tfile = ref->tfile;
+ struct drm_open_hash *ht;
+ struct ttm_mem_global *mem_glob = tfile->tdev->mem_glob;
+
+ ht = &tfile->ref_hash[ref->ref_type];
+ (void)drm_ht_remove_item_rcu(ht, &ref->hash);
+ list_del(&ref->head);
+ spin_unlock(&tfile->lock);
+
+ if (ref->ref_type != TTM_REF_USAGE && base->ref_obj_release)
+ base->ref_obj_release(base, ref->ref_type);
+
+ ttm_base_object_unref(&ref->obj);
+ ttm_mem_global_free(mem_glob, sizeof(*ref));
+ kfree_rcu(ref, rcu_head);
+ spin_lock(&tfile->lock);
+}
+
+int ttm_ref_object_base_unref(struct ttm_object_file *tfile,
+ unsigned long key, enum ttm_ref_type ref_type)
+{
+ struct drm_open_hash *ht = &tfile->ref_hash[ref_type];
+ struct ttm_ref_object *ref;
+ struct drm_hash_item *hash;
+ int ret;
+
+ spin_lock(&tfile->lock);
+ ret = drm_ht_find_item(ht, key, &hash);
+ if (unlikely(ret != 0)) {
+ spin_unlock(&tfile->lock);
+ return -EINVAL;
+ }
+ ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
+ kref_put(&ref->kref, ttm_ref_object_release);
+ spin_unlock(&tfile->lock);
+ return 0;
+}
+EXPORT_SYMBOL(ttm_ref_object_base_unref);
+
+void ttm_object_file_release(struct ttm_object_file **p_tfile)
+{
+ struct ttm_ref_object *ref;
+ struct list_head *list;
+ unsigned int i;
+ struct ttm_object_file *tfile = *p_tfile;
+
+ *p_tfile = NULL;
+ spin_lock(&tfile->lock);
+
+ /*
+ * Since we release the lock within the loop, we have to
+ * restart it from the beginning each time.
+ */
+
+ while (!list_empty(&tfile->ref_list)) {
+ list = tfile->ref_list.next;
+ ref = list_entry(list, struct ttm_ref_object, head);
+ ttm_ref_object_release(&ref->kref);
+ }
+
+ for (i = 0; i < TTM_REF_NUM; ++i)
+ drm_ht_remove(&tfile->ref_hash[i]);
+
+ spin_unlock(&tfile->lock);
+ ttm_object_file_unref(&tfile);
+}
+EXPORT_SYMBOL(ttm_object_file_release);
+
+struct ttm_object_file *ttm_object_file_init(struct ttm_object_device *tdev,
+ unsigned int hash_order)
+{
+ struct ttm_object_file *tfile = kmalloc(sizeof(*tfile), GFP_KERNEL);
+ unsigned int i;
+ unsigned int j = 0;
+ int ret;
+
+ if (unlikely(tfile == NULL))
+ return NULL;
+
+ spin_lock_init(&tfile->lock);
+ tfile->tdev = tdev;
+ kref_init(&tfile->refcount);
+ INIT_LIST_HEAD(&tfile->ref_list);
+
+ for (i = 0; i < TTM_REF_NUM; ++i) {
+ ret = drm_ht_create(&tfile->ref_hash[i], hash_order);
+ if (ret) {
+ j = i;
+ goto out_err;
+ }
+ }
+
+ return tfile;
+out_err:
+ for (i = 0; i < j; ++i)
+ drm_ht_remove(&tfile->ref_hash[i]);
+
+ kfree(tfile);
+
+ return NULL;
+}
+EXPORT_SYMBOL(ttm_object_file_init);
+
+struct ttm_object_device *
+ttm_object_device_init(struct ttm_mem_global *mem_glob,
+ unsigned int hash_order,
+ const struct dma_buf_ops *ops)
+{
+ struct ttm_object_device *tdev = kmalloc(sizeof(*tdev), GFP_KERNEL);
+ int ret;
+
+ if (unlikely(tdev == NULL))
+ return NULL;
+
+ tdev->mem_glob = mem_glob;
+ spin_lock_init(&tdev->object_lock);
+ atomic_set(&tdev->object_count, 0);
+ ret = drm_ht_create(&tdev->object_hash, hash_order);
+ if (ret != 0)
+ goto out_no_object_hash;
+
+ tdev->ops = *ops;
+ tdev->dmabuf_release = tdev->ops.release;
+ tdev->ops.release = ttm_prime_dmabuf_release;
+ tdev->dma_buf_size = ttm_round_pot(sizeof(struct dma_buf)) +
+ ttm_round_pot(sizeof(struct file));
+ return tdev;
+
+out_no_object_hash:
+ kfree(tdev);
+ return NULL;
+}
+EXPORT_SYMBOL(ttm_object_device_init);
+
+void ttm_object_device_release(struct ttm_object_device **p_tdev)
+{
+ struct ttm_object_device *tdev = *p_tdev;
+
+ *p_tdev = NULL;
+
+ spin_lock(&tdev->object_lock);
+ drm_ht_remove(&tdev->object_hash);
+ spin_unlock(&tdev->object_lock);
+
+ kfree(tdev);
+}
+EXPORT_SYMBOL(ttm_object_device_release);
+
+/**
+ * get_dma_buf_unless_doomed - get a dma_buf reference if possible.
+ *
+ * @dma_buf: Non-refcounted pointer to a struct dma-buf.
+ *
+ * Obtain a file reference from a lookup structure that doesn't refcount
+ * the file, but synchronizes with its release method to make sure it has
+ * not been freed yet. See for example kref_get_unless_zero documentation.
+ * Returns true if refcounting succeeds, false otherwise.
+ *
+ * Nobody really wants this as a public API yet, so let it mature here
+ * for some time...
+ */
+static bool __must_check get_dma_buf_unless_doomed(struct dma_buf *dmabuf)
+{
+ return atomic_long_inc_not_zero(&dmabuf->file->f_count) != 0L;
+}
+
+/**
+ * ttm_prime_refcount_release - refcount release method for a prime object.
+ *
+ * @p_base: Pointer to ttm_base_object pointer.
+ *
+ * This is a wrapper that calls the refcount_release founction of the
+ * underlying object. At the same time it cleans up the prime object.
+ * This function is called when all references to the base object we
+ * derive from are gone.
+ */
+static void ttm_prime_refcount_release(struct ttm_base_object **p_base)
+{
+ struct ttm_base_object *base = *p_base;
+ struct ttm_prime_object *prime;
+
+ *p_base = NULL;
+ prime = container_of(base, struct ttm_prime_object, base);
+ BUG_ON(prime->dma_buf != NULL);
+ mutex_destroy(&prime->mutex);
+ if (prime->refcount_release)
+ prime->refcount_release(&base);
+}
+
+/**
+ * ttm_prime_dmabuf_release - Release method for the dma-bufs we export
+ *
+ * @dma_buf:
+ *
+ * This function first calls the dma_buf release method the driver
+ * provides. Then it cleans up our dma_buf pointer used for lookup,
+ * and finally releases the reference the dma_buf has on our base
+ * object.
+ */
+static void ttm_prime_dmabuf_release(struct dma_buf *dma_buf)
+{
+ struct ttm_prime_object *prime =
+ (struct ttm_prime_object *) dma_buf->priv;
+ struct ttm_base_object *base = &prime->base;
+ struct ttm_object_device *tdev = base->tfile->tdev;
+
+ if (tdev->dmabuf_release)
+ tdev->dmabuf_release(dma_buf);
+ mutex_lock(&prime->mutex);
+ if (prime->dma_buf == dma_buf)
+ prime->dma_buf = NULL;
+ mutex_unlock(&prime->mutex);
+ ttm_mem_global_free(tdev->mem_glob, tdev->dma_buf_size);
+ ttm_base_object_unref(&base);
+}
+
+/**
+ * ttm_prime_fd_to_handle - Get a base object handle from a prime fd
+ *
+ * @tfile: A struct ttm_object_file identifying the caller.
+ * @fd: The prime / dmabuf fd.
+ * @handle: The returned handle.
+ *
+ * This function returns a handle to an object that previously exported
+ * a dma-buf. Note that we don't handle imports yet, because we simply
+ * have no consumers of that implementation.
+ */
+int ttm_prime_fd_to_handle(struct ttm_object_file *tfile,
+ int fd, u32 *handle)
+{
+ struct ttm_object_device *tdev = tfile->tdev;
+ struct dma_buf *dma_buf;
+ struct ttm_prime_object *prime;
+ struct ttm_base_object *base;
+ int ret;
+
+ dma_buf = dma_buf_get(fd);
+ if (IS_ERR(dma_buf))
+ return PTR_ERR(dma_buf);
+
+ if (dma_buf->ops != &tdev->ops)
+ return -ENOSYS;
+
+ prime = (struct ttm_prime_object *) dma_buf->priv;
+ base = &prime->base;
+ *handle = base->hash.key;
+ ret = ttm_ref_object_add(tfile, base, TTM_REF_USAGE, NULL);
+
+ dma_buf_put(dma_buf);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ttm_prime_fd_to_handle);
+
+/**
+ * ttm_prime_handle_to_fd - Return a dma_buf fd from a ttm prime object
+ *
+ * @tfile: Struct ttm_object_file identifying the caller.
+ * @handle: Handle to the object we're exporting from.
+ * @flags: flags for dma-buf creation. We just pass them on.
+ * @prime_fd: The returned file descriptor.
+ *
+ */
+int ttm_prime_handle_to_fd(struct ttm_object_file *tfile,
+ uint32_t handle, uint32_t flags,
+ int *prime_fd)
+{
+ struct ttm_object_device *tdev = tfile->tdev;
+ struct ttm_base_object *base;
+ struct dma_buf *dma_buf;
+ struct ttm_prime_object *prime;
+ int ret;
+
+ base = ttm_base_object_lookup(tfile, handle);
+ if (unlikely(base == NULL ||
+ base->object_type != ttm_prime_type)) {
+ ret = -ENOENT;
+ goto out_unref;
+ }
+
+ prime = container_of(base, struct ttm_prime_object, base);
+ if (unlikely(!base->shareable)) {
+ ret = -EPERM;
+ goto out_unref;
+ }
+
+ ret = mutex_lock_interruptible(&prime->mutex);
+ if (unlikely(ret != 0)) {
+ ret = -ERESTARTSYS;
+ goto out_unref;
+ }
+
+ dma_buf = prime->dma_buf;
+ if (!dma_buf || !get_dma_buf_unless_doomed(dma_buf)) {
+ DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
+
+ exp_info.ops = &tdev->ops;
+ exp_info.size = prime->size;
+ exp_info.flags = flags;
+ exp_info.priv = prime;
+
+ /*
+ * Need to create a new dma_buf, with memory accounting.
+ */
+ ret = ttm_mem_global_alloc(tdev->mem_glob, tdev->dma_buf_size,
+ false, true);
+ if (unlikely(ret != 0)) {
+ mutex_unlock(&prime->mutex);
+ goto out_unref;
+ }
+
+ dma_buf = dma_buf_export(&exp_info);
+ if (IS_ERR(dma_buf)) {
+ ret = PTR_ERR(dma_buf);
+ ttm_mem_global_free(tdev->mem_glob,
+ tdev->dma_buf_size);
+ mutex_unlock(&prime->mutex);
+ goto out_unref;
+ }
+
+ /*
+ * dma_buf has taken the base object reference
+ */
+ base = NULL;
+ prime->dma_buf = dma_buf;
+ }
+ mutex_unlock(&prime->mutex);
+
+ ret = dma_buf_fd(dma_buf, flags);
+ if (ret >= 0) {
+ *prime_fd = ret;
+ ret = 0;
+ } else
+ dma_buf_put(dma_buf);
+
+out_unref:
+ if (base)
+ ttm_base_object_unref(&base);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ttm_prime_handle_to_fd);
+
+/**
+ * ttm_prime_object_init - Initialize a ttm_prime_object
+ *
+ * @tfile: struct ttm_object_file identifying the caller
+ * @size: The size of the dma_bufs we export.
+ * @prime: The object to be initialized.
+ * @shareable: See ttm_base_object_init
+ * @type: See ttm_base_object_init
+ * @refcount_release: See ttm_base_object_init
+ * @ref_obj_release: See ttm_base_object_init
+ *
+ * Initializes an object which is compatible with the drm_prime model
+ * for data sharing between processes and devices.
+ */
+int ttm_prime_object_init(struct ttm_object_file *tfile, size_t size,
+ struct ttm_prime_object *prime, bool shareable,
+ enum ttm_object_type type,
+ void (*refcount_release) (struct ttm_base_object **),
+ void (*ref_obj_release) (struct ttm_base_object *,
+ enum ttm_ref_type ref_type))
+{
+ mutex_init(&prime->mutex);
+ prime->size = PAGE_ALIGN(size);
+ prime->real_type = type;
+ prime->dma_buf = NULL;
+ prime->refcount_release = refcount_release;
+ return ttm_base_object_init(tfile, &prime->base, shareable,
+ ttm_prime_type,
+ ttm_prime_refcount_release,
+ ref_obj_release);
+}
+EXPORT_SYMBOL(ttm_prime_object_init);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_page_alloc.c b/kernel/drivers/gpu/drm/ttm/ttm_page_alloc.c
new file mode 100644
index 000000000..025c42905
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -0,0 +1,940 @@
+/*
+ * Copyright (c) Red Hat Inc.
+
+ * 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 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: Dave Airlie <airlied@redhat.com>
+ * Jerome Glisse <jglisse@redhat.com>
+ * Pauli Nieminen <suokkos@gmail.com>
+ */
+
+/* simple list based uncached page pool
+ * - Pool collects resently freed pages for reuse
+ * - Use page->lru to keep a free list
+ * - doesn't track currently in use pages
+ */
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/highmem.h>
+#include <linux/mm_types.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h> /* for seq_printf */
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+
+#include <linux/atomic.h>
+
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_page_alloc.h>
+
+#ifdef TTM_HAS_AGP
+#include <asm/agp.h>
+#endif
+
+#define NUM_PAGES_TO_ALLOC (PAGE_SIZE/sizeof(struct page *))
+#define SMALL_ALLOCATION 16
+#define FREE_ALL_PAGES (~0U)
+/* times are in msecs */
+#define PAGE_FREE_INTERVAL 1000
+
+/**
+ * struct ttm_page_pool - Pool to reuse recently allocated uc/wc pages.
+ *
+ * @lock: Protects the shared pool from concurrnet access. Must be used with
+ * irqsave/irqrestore variants because pool allocator maybe called from
+ * delayed work.
+ * @fill_lock: Prevent concurrent calls to fill.
+ * @list: Pool of free uc/wc pages for fast reuse.
+ * @gfp_flags: Flags to pass for alloc_page.
+ * @npages: Number of pages in pool.
+ */
+struct ttm_page_pool {
+ spinlock_t lock;
+ bool fill_lock;
+ struct list_head list;
+ gfp_t gfp_flags;
+ unsigned npages;
+ char *name;
+ unsigned long nfrees;
+ unsigned long nrefills;
+};
+
+/**
+ * Limits for the pool. They are handled without locks because only place where
+ * they may change is in sysfs store. They won't have immediate effect anyway
+ * so forcing serialization to access them is pointless.
+ */
+
+struct ttm_pool_opts {
+ unsigned alloc_size;
+ unsigned max_size;
+ unsigned small;
+};
+
+#define NUM_POOLS 4
+
+/**
+ * struct ttm_pool_manager - Holds memory pools for fst allocation
+ *
+ * Manager is read only object for pool code so it doesn't need locking.
+ *
+ * @free_interval: minimum number of jiffies between freeing pages from pool.
+ * @page_alloc_inited: reference counting for pool allocation.
+ * @work: Work that is used to shrink the pool. Work is only run when there is
+ * some pages to free.
+ * @small_allocation: Limit in number of pages what is small allocation.
+ *
+ * @pools: All pool objects in use.
+ **/
+struct ttm_pool_manager {
+ struct kobject kobj;
+ struct shrinker mm_shrink;
+ struct ttm_pool_opts options;
+
+ union {
+ struct ttm_page_pool pools[NUM_POOLS];
+ struct {
+ struct ttm_page_pool wc_pool;
+ struct ttm_page_pool uc_pool;
+ struct ttm_page_pool wc_pool_dma32;
+ struct ttm_page_pool uc_pool_dma32;
+ } ;
+ };
+};
+
+static struct attribute ttm_page_pool_max = {
+ .name = "pool_max_size",
+ .mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_page_pool_small = {
+ .name = "pool_small_allocation",
+ .mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_page_pool_alloc_size = {
+ .name = "pool_allocation_size",
+ .mode = S_IRUGO | S_IWUSR
+};
+
+static struct attribute *ttm_pool_attrs[] = {
+ &ttm_page_pool_max,
+ &ttm_page_pool_small,
+ &ttm_page_pool_alloc_size,
+ NULL
+};
+
+static void ttm_pool_kobj_release(struct kobject *kobj)
+{
+ struct ttm_pool_manager *m =
+ container_of(kobj, struct ttm_pool_manager, kobj);
+ kfree(m);
+}
+
+static ssize_t ttm_pool_store(struct kobject *kobj,
+ struct attribute *attr, const char *buffer, size_t size)
+{
+ struct ttm_pool_manager *m =
+ container_of(kobj, struct ttm_pool_manager, kobj);
+ int chars;
+ unsigned val;
+ chars = sscanf(buffer, "%u", &val);
+ if (chars == 0)
+ return size;
+
+ /* Convert kb to number of pages */
+ val = val / (PAGE_SIZE >> 10);
+
+ if (attr == &ttm_page_pool_max)
+ m->options.max_size = val;
+ else if (attr == &ttm_page_pool_small)
+ m->options.small = val;
+ else if (attr == &ttm_page_pool_alloc_size) {
+ if (val > NUM_PAGES_TO_ALLOC*8) {
+ pr_err("Setting allocation size to %lu is not allowed. Recommended size is %lu\n",
+ NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 7),
+ NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
+ return size;
+ } else if (val > NUM_PAGES_TO_ALLOC) {
+ pr_warn("Setting allocation size to larger than %lu is not recommended\n",
+ NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
+ }
+ m->options.alloc_size = val;
+ }
+
+ return size;
+}
+
+static ssize_t ttm_pool_show(struct kobject *kobj,
+ struct attribute *attr, char *buffer)
+{
+ struct ttm_pool_manager *m =
+ container_of(kobj, struct ttm_pool_manager, kobj);
+ unsigned val = 0;
+
+ if (attr == &ttm_page_pool_max)
+ val = m->options.max_size;
+ else if (attr == &ttm_page_pool_small)
+ val = m->options.small;
+ else if (attr == &ttm_page_pool_alloc_size)
+ val = m->options.alloc_size;
+
+ val = val * (PAGE_SIZE >> 10);
+
+ return snprintf(buffer, PAGE_SIZE, "%u\n", val);
+}
+
+static const struct sysfs_ops ttm_pool_sysfs_ops = {
+ .show = &ttm_pool_show,
+ .store = &ttm_pool_store,
+};
+
+static struct kobj_type ttm_pool_kobj_type = {
+ .release = &ttm_pool_kobj_release,
+ .sysfs_ops = &ttm_pool_sysfs_ops,
+ .default_attrs = ttm_pool_attrs,
+};
+
+static struct ttm_pool_manager *_manager;
+
+#ifndef CONFIG_X86
+static int set_pages_array_wb(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+ int i;
+
+ for (i = 0; i < addrinarray; i++)
+ unmap_page_from_agp(pages[i]);
+#endif
+ return 0;
+}
+
+static int set_pages_array_wc(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+ int i;
+
+ for (i = 0; i < addrinarray; i++)
+ map_page_into_agp(pages[i]);
+#endif
+ return 0;
+}
+
+static int set_pages_array_uc(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+ int i;
+
+ for (i = 0; i < addrinarray; i++)
+ map_page_into_agp(pages[i]);
+#endif
+ return 0;
+}
+#endif
+
+/**
+ * Select the right pool or requested caching state and ttm flags. */
+static struct ttm_page_pool *ttm_get_pool(int flags,
+ enum ttm_caching_state cstate)
+{
+ int pool_index;
+
+ if (cstate == tt_cached)
+ return NULL;
+
+ if (cstate == tt_wc)
+ pool_index = 0x0;
+ else
+ pool_index = 0x1;
+
+ if (flags & TTM_PAGE_FLAG_DMA32)
+ pool_index |= 0x2;
+
+ return &_manager->pools[pool_index];
+}
+
+/* set memory back to wb and free the pages. */
+static void ttm_pages_put(struct page *pages[], unsigned npages)
+{
+ unsigned i;
+ if (set_pages_array_wb(pages, npages))
+ pr_err("Failed to set %d pages to wb!\n", npages);
+ for (i = 0; i < npages; ++i)
+ __free_page(pages[i]);
+}
+
+static void ttm_pool_update_free_locked(struct ttm_page_pool *pool,
+ unsigned freed_pages)
+{
+ pool->npages -= freed_pages;
+ pool->nfrees += freed_pages;
+}
+
+/**
+ * Free pages from pool.
+ *
+ * To prevent hogging the ttm_swap process we only free NUM_PAGES_TO_ALLOC
+ * number of pages in one go.
+ *
+ * @pool: to free the pages from
+ * @free_all: If set to true will free all pages in pool
+ * @use_static: Safe to use static buffer
+ **/
+static int ttm_page_pool_free(struct ttm_page_pool *pool, unsigned nr_free,
+ bool use_static)
+{
+ static struct page *static_buf[NUM_PAGES_TO_ALLOC];
+ unsigned long irq_flags;
+ struct page *p;
+ struct page **pages_to_free;
+ unsigned freed_pages = 0,
+ npages_to_free = nr_free;
+
+ if (NUM_PAGES_TO_ALLOC < nr_free)
+ npages_to_free = NUM_PAGES_TO_ALLOC;
+
+ if (use_static)
+ pages_to_free = static_buf;
+ else
+ pages_to_free = kmalloc(npages_to_free * sizeof(struct page *),
+ GFP_KERNEL);
+ if (!pages_to_free) {
+ pr_err("Failed to allocate memory for pool free operation\n");
+ return 0;
+ }
+
+restart:
+ spin_lock_irqsave(&pool->lock, irq_flags);
+
+ list_for_each_entry_reverse(p, &pool->list, lru) {
+ if (freed_pages >= npages_to_free)
+ break;
+
+ pages_to_free[freed_pages++] = p;
+ /* We can only remove NUM_PAGES_TO_ALLOC at a time. */
+ if (freed_pages >= NUM_PAGES_TO_ALLOC) {
+ /* remove range of pages from the pool */
+ __list_del(p->lru.prev, &pool->list);
+
+ ttm_pool_update_free_locked(pool, freed_pages);
+ /**
+ * Because changing page caching is costly
+ * we unlock the pool to prevent stalling.
+ */
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+ ttm_pages_put(pages_to_free, freed_pages);
+ if (likely(nr_free != FREE_ALL_PAGES))
+ nr_free -= freed_pages;
+
+ if (NUM_PAGES_TO_ALLOC >= nr_free)
+ npages_to_free = nr_free;
+ else
+ npages_to_free = NUM_PAGES_TO_ALLOC;
+
+ freed_pages = 0;
+
+ /* free all so restart the processing */
+ if (nr_free)
+ goto restart;
+
+ /* Not allowed to fall through or break because
+ * following context is inside spinlock while we are
+ * outside here.
+ */
+ goto out;
+
+ }
+ }
+
+ /* remove range of pages from the pool */
+ if (freed_pages) {
+ __list_del(&p->lru, &pool->list);
+
+ ttm_pool_update_free_locked(pool, freed_pages);
+ nr_free -= freed_pages;
+ }
+
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+ if (freed_pages)
+ ttm_pages_put(pages_to_free, freed_pages);
+out:
+ if (pages_to_free != static_buf)
+ kfree(pages_to_free);
+ return nr_free;
+}
+
+/**
+ * Callback for mm to request pool to reduce number of page held.
+ *
+ * XXX: (dchinner) Deadlock warning!
+ *
+ * This code is crying out for a shrinker per pool....
+ */
+static unsigned long
+ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
+{
+ static DEFINE_MUTEX(lock);
+ static unsigned start_pool;
+ unsigned i;
+ unsigned pool_offset;
+ struct ttm_page_pool *pool;
+ int shrink_pages = sc->nr_to_scan;
+ unsigned long freed = 0;
+
+ if (!mutex_trylock(&lock))
+ return SHRINK_STOP;
+ pool_offset = ++start_pool % NUM_POOLS;
+ /* select start pool in round robin fashion */
+ for (i = 0; i < NUM_POOLS; ++i) {
+ unsigned nr_free = shrink_pages;
+ if (shrink_pages == 0)
+ break;
+ pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
+ /* OK to use static buffer since global mutex is held. */
+ shrink_pages = ttm_page_pool_free(pool, nr_free, true);
+ freed += nr_free - shrink_pages;
+ }
+ mutex_unlock(&lock);
+ return freed;
+}
+
+
+static unsigned long
+ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
+{
+ unsigned i;
+ unsigned long count = 0;
+
+ for (i = 0; i < NUM_POOLS; ++i)
+ count += _manager->pools[i].npages;
+
+ return count;
+}
+
+static void ttm_pool_mm_shrink_init(struct ttm_pool_manager *manager)
+{
+ manager->mm_shrink.count_objects = ttm_pool_shrink_count;
+ manager->mm_shrink.scan_objects = ttm_pool_shrink_scan;
+ manager->mm_shrink.seeks = 1;
+ register_shrinker(&manager->mm_shrink);
+}
+
+static void ttm_pool_mm_shrink_fini(struct ttm_pool_manager *manager)
+{
+ unregister_shrinker(&manager->mm_shrink);
+}
+
+static int ttm_set_pages_caching(struct page **pages,
+ enum ttm_caching_state cstate, unsigned cpages)
+{
+ int r = 0;
+ /* Set page caching */
+ switch (cstate) {
+ case tt_uncached:
+ r = set_pages_array_uc(pages, cpages);
+ if (r)
+ pr_err("Failed to set %d pages to uc!\n", cpages);
+ break;
+ case tt_wc:
+ r = set_pages_array_wc(pages, cpages);
+ if (r)
+ pr_err("Failed to set %d pages to wc!\n", cpages);
+ break;
+ default:
+ break;
+ }
+ return r;
+}
+
+/**
+ * Free pages the pages that failed to change the caching state. If there is
+ * any pages that have changed their caching state already put them to the
+ * pool.
+ */
+static void ttm_handle_caching_state_failure(struct list_head *pages,
+ int ttm_flags, enum ttm_caching_state cstate,
+ struct page **failed_pages, unsigned cpages)
+{
+ unsigned i;
+ /* Failed pages have to be freed */
+ for (i = 0; i < cpages; ++i) {
+ list_del(&failed_pages[i]->lru);
+ __free_page(failed_pages[i]);
+ }
+}
+
+/**
+ * Allocate new pages with correct caching.
+ *
+ * This function is reentrant if caller updates count depending on number of
+ * pages returned in pages array.
+ */
+static int ttm_alloc_new_pages(struct list_head *pages, gfp_t gfp_flags,
+ int ttm_flags, enum ttm_caching_state cstate, unsigned count)
+{
+ struct page **caching_array;
+ struct page *p;
+ int r = 0;
+ unsigned i, cpages;
+ unsigned max_cpages = min(count,
+ (unsigned)(PAGE_SIZE/sizeof(struct page *)));
+
+ /* allocate array for page caching change */
+ caching_array = kmalloc(max_cpages*sizeof(struct page *), GFP_KERNEL);
+
+ if (!caching_array) {
+ pr_err("Unable to allocate table for new pages\n");
+ return -ENOMEM;
+ }
+
+ for (i = 0, cpages = 0; i < count; ++i) {
+ p = alloc_page(gfp_flags);
+
+ if (!p) {
+ pr_err("Unable to get page %u\n", i);
+
+ /* store already allocated pages in the pool after
+ * setting the caching state */
+ if (cpages) {
+ r = ttm_set_pages_caching(caching_array,
+ cstate, cpages);
+ if (r)
+ ttm_handle_caching_state_failure(pages,
+ ttm_flags, cstate,
+ caching_array, cpages);
+ }
+ r = -ENOMEM;
+ goto out;
+ }
+
+#ifdef CONFIG_HIGHMEM
+ /* gfp flags of highmem page should never be dma32 so we
+ * we should be fine in such case
+ */
+ if (!PageHighMem(p))
+#endif
+ {
+ caching_array[cpages++] = p;
+ if (cpages == max_cpages) {
+
+ r = ttm_set_pages_caching(caching_array,
+ cstate, cpages);
+ if (r) {
+ ttm_handle_caching_state_failure(pages,
+ ttm_flags, cstate,
+ caching_array, cpages);
+ goto out;
+ }
+ cpages = 0;
+ }
+ }
+
+ list_add(&p->lru, pages);
+ }
+
+ if (cpages) {
+ r = ttm_set_pages_caching(caching_array, cstate, cpages);
+ if (r)
+ ttm_handle_caching_state_failure(pages,
+ ttm_flags, cstate,
+ caching_array, cpages);
+ }
+out:
+ kfree(caching_array);
+
+ return r;
+}
+
+/**
+ * Fill the given pool if there aren't enough pages and the requested number of
+ * pages is small.
+ */
+static void ttm_page_pool_fill_locked(struct ttm_page_pool *pool,
+ int ttm_flags, enum ttm_caching_state cstate, unsigned count,
+ unsigned long *irq_flags)
+{
+ struct page *p;
+ int r;
+ unsigned cpages = 0;
+ /**
+ * Only allow one pool fill operation at a time.
+ * If pool doesn't have enough pages for the allocation new pages are
+ * allocated from outside of pool.
+ */
+ if (pool->fill_lock)
+ return;
+
+ pool->fill_lock = true;
+
+ /* If allocation request is small and there are not enough
+ * pages in a pool we fill the pool up first. */
+ if (count < _manager->options.small
+ && count > pool->npages) {
+ struct list_head new_pages;
+ unsigned alloc_size = _manager->options.alloc_size;
+
+ /**
+ * Can't change page caching if in irqsave context. We have to
+ * drop the pool->lock.
+ */
+ spin_unlock_irqrestore(&pool->lock, *irq_flags);
+
+ INIT_LIST_HEAD(&new_pages);
+ r = ttm_alloc_new_pages(&new_pages, pool->gfp_flags, ttm_flags,
+ cstate, alloc_size);
+ spin_lock_irqsave(&pool->lock, *irq_flags);
+
+ if (!r) {
+ list_splice(&new_pages, &pool->list);
+ ++pool->nrefills;
+ pool->npages += alloc_size;
+ } else {
+ pr_err("Failed to fill pool (%p)\n", pool);
+ /* If we have any pages left put them to the pool. */
+ list_for_each_entry(p, &pool->list, lru) {
+ ++cpages;
+ }
+ list_splice(&new_pages, &pool->list);
+ pool->npages += cpages;
+ }
+
+ }
+ pool->fill_lock = false;
+}
+
+/**
+ * Cut 'count' number of pages from the pool and put them on the return list.
+ *
+ * @return count of pages still required to fulfill the request.
+ */
+static unsigned ttm_page_pool_get_pages(struct ttm_page_pool *pool,
+ struct list_head *pages,
+ int ttm_flags,
+ enum ttm_caching_state cstate,
+ unsigned count)
+{
+ unsigned long irq_flags;
+ struct list_head *p;
+ unsigned i;
+
+ spin_lock_irqsave(&pool->lock, irq_flags);
+ ttm_page_pool_fill_locked(pool, ttm_flags, cstate, count, &irq_flags);
+
+ if (count >= pool->npages) {
+ /* take all pages from the pool */
+ list_splice_init(&pool->list, pages);
+ count -= pool->npages;
+ pool->npages = 0;
+ goto out;
+ }
+ /* find the last pages to include for requested number of pages. Split
+ * pool to begin and halve it to reduce search space. */
+ if (count <= pool->npages/2) {
+ i = 0;
+ list_for_each(p, &pool->list) {
+ if (++i == count)
+ break;
+ }
+ } else {
+ i = pool->npages + 1;
+ list_for_each_prev(p, &pool->list) {
+ if (--i == count)
+ break;
+ }
+ }
+ /* Cut 'count' number of pages from the pool */
+ list_cut_position(pages, &pool->list, p);
+ pool->npages -= count;
+ count = 0;
+out:
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+ return count;
+}
+
+/* Put all pages in pages list to correct pool to wait for reuse */
+static void ttm_put_pages(struct page **pages, unsigned npages, int flags,
+ enum ttm_caching_state cstate)
+{
+ unsigned long irq_flags;
+ struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
+ unsigned i;
+
+ if (pool == NULL) {
+ /* No pool for this memory type so free the pages */
+ for (i = 0; i < npages; i++) {
+ if (pages[i]) {
+ if (page_count(pages[i]) != 1)
+ pr_err("Erroneous page count. Leaking pages.\n");
+ __free_page(pages[i]);
+ pages[i] = NULL;
+ }
+ }
+ return;
+ }
+
+ spin_lock_irqsave(&pool->lock, irq_flags);
+ for (i = 0; i < npages; i++) {
+ if (pages[i]) {
+ if (page_count(pages[i]) != 1)
+ pr_err("Erroneous page count. Leaking pages.\n");
+ list_add_tail(&pages[i]->lru, &pool->list);
+ pages[i] = NULL;
+ pool->npages++;
+ }
+ }
+ /* Check that we don't go over the pool limit */
+ npages = 0;
+ if (pool->npages > _manager->options.max_size) {
+ npages = pool->npages - _manager->options.max_size;
+ /* free at least NUM_PAGES_TO_ALLOC number of pages
+ * to reduce calls to set_memory_wb */
+ if (npages < NUM_PAGES_TO_ALLOC)
+ npages = NUM_PAGES_TO_ALLOC;
+ }
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+ if (npages)
+ ttm_page_pool_free(pool, npages, false);
+}
+
+/*
+ * On success pages list will hold count number of correctly
+ * cached pages.
+ */
+static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
+ enum ttm_caching_state cstate)
+{
+ struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
+ struct list_head plist;
+ struct page *p = NULL;
+ gfp_t gfp_flags = GFP_USER;
+ unsigned count;
+ int r;
+
+ /* set zero flag for page allocation if required */
+ if (flags & TTM_PAGE_FLAG_ZERO_ALLOC)
+ gfp_flags |= __GFP_ZERO;
+
+ /* No pool for cached pages */
+ if (pool == NULL) {
+ if (flags & TTM_PAGE_FLAG_DMA32)
+ gfp_flags |= GFP_DMA32;
+ else
+ gfp_flags |= GFP_HIGHUSER;
+
+ for (r = 0; r < npages; ++r) {
+ p = alloc_page(gfp_flags);
+ if (!p) {
+
+ pr_err("Unable to allocate page\n");
+ return -ENOMEM;
+ }
+
+ pages[r] = p;
+ }
+ return 0;
+ }
+
+ /* combine zero flag to pool flags */
+ gfp_flags |= pool->gfp_flags;
+
+ /* First we take pages from the pool */
+ INIT_LIST_HEAD(&plist);
+ npages = ttm_page_pool_get_pages(pool, &plist, flags, cstate, npages);
+ count = 0;
+ list_for_each_entry(p, &plist, lru) {
+ pages[count++] = p;
+ }
+
+ /* clear the pages coming from the pool if requested */
+ if (flags & TTM_PAGE_FLAG_ZERO_ALLOC) {
+ list_for_each_entry(p, &plist, lru) {
+ if (PageHighMem(p))
+ clear_highpage(p);
+ else
+ clear_page(page_address(p));
+ }
+ }
+
+ /* If pool didn't have enough pages allocate new one. */
+ if (npages > 0) {
+ /* ttm_alloc_new_pages doesn't reference pool so we can run
+ * multiple requests in parallel.
+ **/
+ INIT_LIST_HEAD(&plist);
+ r = ttm_alloc_new_pages(&plist, gfp_flags, flags, cstate, npages);
+ list_for_each_entry(p, &plist, lru) {
+ pages[count++] = p;
+ }
+ if (r) {
+ /* If there is any pages in the list put them back to
+ * the pool. */
+ pr_err("Failed to allocate extra pages for large request\n");
+ ttm_put_pages(pages, count, flags, cstate);
+ return r;
+ }
+ }
+
+ return 0;
+}
+
+static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
+ char *name)
+{
+ spin_lock_init(&pool->lock);
+ pool->fill_lock = false;
+ INIT_LIST_HEAD(&pool->list);
+ pool->npages = pool->nfrees = 0;
+ pool->gfp_flags = flags;
+ pool->name = name;
+}
+
+int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
+{
+ int ret;
+
+ WARN_ON(_manager);
+
+ pr_info("Initializing pool allocator\n");
+
+ _manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
+
+ ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");
+
+ ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc");
+
+ ttm_page_pool_init_locked(&_manager->wc_pool_dma32,
+ GFP_USER | GFP_DMA32, "wc dma");
+
+ ttm_page_pool_init_locked(&_manager->uc_pool_dma32,
+ GFP_USER | GFP_DMA32, "uc dma");
+
+ _manager->options.max_size = max_pages;
+ _manager->options.small = SMALL_ALLOCATION;
+ _manager->options.alloc_size = NUM_PAGES_TO_ALLOC;
+
+ ret = kobject_init_and_add(&_manager->kobj, &ttm_pool_kobj_type,
+ &glob->kobj, "pool");
+ if (unlikely(ret != 0)) {
+ kobject_put(&_manager->kobj);
+ _manager = NULL;
+ return ret;
+ }
+
+ ttm_pool_mm_shrink_init(_manager);
+
+ return 0;
+}
+
+void ttm_page_alloc_fini(void)
+{
+ int i;
+
+ pr_info("Finalizing pool allocator\n");
+ ttm_pool_mm_shrink_fini(_manager);
+
+ /* OK to use static buffer since global mutex is no longer used. */
+ for (i = 0; i < NUM_POOLS; ++i)
+ ttm_page_pool_free(&_manager->pools[i], FREE_ALL_PAGES, true);
+
+ kobject_put(&_manager->kobj);
+ _manager = NULL;
+}
+
+int ttm_pool_populate(struct ttm_tt *ttm)
+{
+ struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
+ unsigned i;
+ int ret;
+
+ if (ttm->state != tt_unpopulated)
+ return 0;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ ret = ttm_get_pages(&ttm->pages[i], 1,
+ ttm->page_flags,
+ ttm->caching_state);
+ if (ret != 0) {
+ ttm_pool_unpopulate(ttm);
+ return -ENOMEM;
+ }
+
+ ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
+ false, false);
+ if (unlikely(ret != 0)) {
+ ttm_pool_unpopulate(ttm);
+ return -ENOMEM;
+ }
+ }
+
+ if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+ ret = ttm_tt_swapin(ttm);
+ if (unlikely(ret != 0)) {
+ ttm_pool_unpopulate(ttm);
+ return ret;
+ }
+ }
+
+ ttm->state = tt_unbound;
+ return 0;
+}
+EXPORT_SYMBOL(ttm_pool_populate);
+
+void ttm_pool_unpopulate(struct ttm_tt *ttm)
+{
+ unsigned i;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ if (ttm->pages[i]) {
+ ttm_mem_global_free_page(ttm->glob->mem_glob,
+ ttm->pages[i]);
+ ttm_put_pages(&ttm->pages[i], 1,
+ ttm->page_flags,
+ ttm->caching_state);
+ }
+ }
+ ttm->state = tt_unpopulated;
+}
+EXPORT_SYMBOL(ttm_pool_unpopulate);
+
+int ttm_page_alloc_debugfs(struct seq_file *m, void *data)
+{
+ struct ttm_page_pool *p;
+ unsigned i;
+ char *h[] = {"pool", "refills", "pages freed", "size"};
+ if (!_manager) {
+ seq_printf(m, "No pool allocator running.\n");
+ return 0;
+ }
+ seq_printf(m, "%6s %12s %13s %8s\n",
+ h[0], h[1], h[2], h[3]);
+ for (i = 0; i < NUM_POOLS; ++i) {
+ p = &_manager->pools[i];
+
+ seq_printf(m, "%6s %12ld %13ld %8d\n",
+ p->name, p->nrefills,
+ p->nfrees, p->npages);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_page_alloc_debugfs);
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/kernel/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
new file mode 100644
index 000000000..01e1d27eb
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -0,0 +1,1158 @@
+/*
+ * Copyright 2011 (c) Oracle Corp.
+
+ * 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 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.
+ *
+ * Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+ */
+
+/*
+ * A simple DMA pool losely based on dmapool.c. It has certain advantages
+ * over the DMA pools:
+ * - Pool collects resently freed pages for reuse (and hooks up to
+ * the shrinker).
+ * - Tracks currently in use pages
+ * - Tracks whether the page is UC, WB or cached (and reverts to WB
+ * when freed).
+ */
+
+#if defined(CONFIG_SWIOTLB) || defined(CONFIG_INTEL_IOMMU)
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <linux/dma-mapping.h>
+#include <linux/list.h>
+#include <linux/seq_file.h> /* for seq_printf */
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/highmem.h>
+#include <linux/mm_types.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/atomic.h>
+#include <linux/device.h>
+#include <linux/kthread.h>
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_page_alloc.h>
+#ifdef TTM_HAS_AGP
+#include <asm/agp.h>
+#endif
+
+#define NUM_PAGES_TO_ALLOC (PAGE_SIZE/sizeof(struct page *))
+#define SMALL_ALLOCATION 4
+#define FREE_ALL_PAGES (~0U)
+/* times are in msecs */
+#define IS_UNDEFINED (0)
+#define IS_WC (1<<1)
+#define IS_UC (1<<2)
+#define IS_CACHED (1<<3)
+#define IS_DMA32 (1<<4)
+
+enum pool_type {
+ POOL_IS_UNDEFINED,
+ POOL_IS_WC = IS_WC,
+ POOL_IS_UC = IS_UC,
+ POOL_IS_CACHED = IS_CACHED,
+ POOL_IS_WC_DMA32 = IS_WC | IS_DMA32,
+ POOL_IS_UC_DMA32 = IS_UC | IS_DMA32,
+ POOL_IS_CACHED_DMA32 = IS_CACHED | IS_DMA32,
+};
+/*
+ * The pool structure. There are usually six pools:
+ * - generic (not restricted to DMA32):
+ * - write combined, uncached, cached.
+ * - dma32 (up to 2^32 - so up 4GB):
+ * - write combined, uncached, cached.
+ * for each 'struct device'. The 'cached' is for pages that are actively used.
+ * The other ones can be shrunk by the shrinker API if neccessary.
+ * @pools: The 'struct device->dma_pools' link.
+ * @type: Type of the pool
+ * @lock: Protects the inuse_list and free_list from concurrnet access. Must be
+ * used with irqsave/irqrestore variants because pool allocator maybe called
+ * from delayed work.
+ * @inuse_list: Pool of pages that are in use. The order is very important and
+ * it is in the order that the TTM pages that are put back are in.
+ * @free_list: Pool of pages that are free to be used. No order requirements.
+ * @dev: The device that is associated with these pools.
+ * @size: Size used during DMA allocation.
+ * @npages_free: Count of available pages for re-use.
+ * @npages_in_use: Count of pages that are in use.
+ * @nfrees: Stats when pool is shrinking.
+ * @nrefills: Stats when the pool is grown.
+ * @gfp_flags: Flags to pass for alloc_page.
+ * @name: Name of the pool.
+ * @dev_name: Name derieved from dev - similar to how dev_info works.
+ * Used during shutdown as the dev_info during release is unavailable.
+ */
+struct dma_pool {
+ struct list_head pools; /* The 'struct device->dma_pools link */
+ enum pool_type type;
+ spinlock_t lock;
+ struct list_head inuse_list;
+ struct list_head free_list;
+ struct device *dev;
+ unsigned size;
+ unsigned npages_free;
+ unsigned npages_in_use;
+ unsigned long nfrees; /* Stats when shrunk. */
+ unsigned long nrefills; /* Stats when grown. */
+ gfp_t gfp_flags;
+ char name[13]; /* "cached dma32" */
+ char dev_name[64]; /* Constructed from dev */
+};
+
+/*
+ * The accounting page keeping track of the allocated page along with
+ * the DMA address.
+ * @page_list: The link to the 'page_list' in 'struct dma_pool'.
+ * @vaddr: The virtual address of the page
+ * @dma: The bus address of the page. If the page is not allocated
+ * via the DMA API, it will be -1.
+ */
+struct dma_page {
+ struct list_head page_list;
+ void *vaddr;
+ struct page *p;
+ dma_addr_t dma;
+};
+
+/*
+ * Limits for the pool. They are handled without locks because only place where
+ * they may change is in sysfs store. They won't have immediate effect anyway
+ * so forcing serialization to access them is pointless.
+ */
+
+struct ttm_pool_opts {
+ unsigned alloc_size;
+ unsigned max_size;
+ unsigned small;
+};
+
+/*
+ * Contains the list of all of the 'struct device' and their corresponding
+ * DMA pools. Guarded by _mutex->lock.
+ * @pools: The link to 'struct ttm_pool_manager->pools'
+ * @dev: The 'struct device' associated with the 'pool'
+ * @pool: The 'struct dma_pool' associated with the 'dev'
+ */
+struct device_pools {
+ struct list_head pools;
+ struct device *dev;
+ struct dma_pool *pool;
+};
+
+/*
+ * struct ttm_pool_manager - Holds memory pools for fast allocation
+ *
+ * @lock: Lock used when adding/removing from pools
+ * @pools: List of 'struct device' and 'struct dma_pool' tuples.
+ * @options: Limits for the pool.
+ * @npools: Total amount of pools in existence.
+ * @shrinker: The structure used by [un|]register_shrinker
+ */
+struct ttm_pool_manager {
+ struct mutex lock;
+ struct list_head pools;
+ struct ttm_pool_opts options;
+ unsigned npools;
+ struct shrinker mm_shrink;
+ struct kobject kobj;
+};
+
+static struct ttm_pool_manager *_manager;
+
+static struct attribute ttm_page_pool_max = {
+ .name = "pool_max_size",
+ .mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_page_pool_small = {
+ .name = "pool_small_allocation",
+ .mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_page_pool_alloc_size = {
+ .name = "pool_allocation_size",
+ .mode = S_IRUGO | S_IWUSR
+};
+
+static struct attribute *ttm_pool_attrs[] = {
+ &ttm_page_pool_max,
+ &ttm_page_pool_small,
+ &ttm_page_pool_alloc_size,
+ NULL
+};
+
+static void ttm_pool_kobj_release(struct kobject *kobj)
+{
+ struct ttm_pool_manager *m =
+ container_of(kobj, struct ttm_pool_manager, kobj);
+ kfree(m);
+}
+
+static ssize_t ttm_pool_store(struct kobject *kobj, struct attribute *attr,
+ const char *buffer, size_t size)
+{
+ struct ttm_pool_manager *m =
+ container_of(kobj, struct ttm_pool_manager, kobj);
+ int chars;
+ unsigned val;
+ chars = sscanf(buffer, "%u", &val);
+ if (chars == 0)
+ return size;
+
+ /* Convert kb to number of pages */
+ val = val / (PAGE_SIZE >> 10);
+
+ if (attr == &ttm_page_pool_max)
+ m->options.max_size = val;
+ else if (attr == &ttm_page_pool_small)
+ m->options.small = val;
+ else if (attr == &ttm_page_pool_alloc_size) {
+ if (val > NUM_PAGES_TO_ALLOC*8) {
+ pr_err("Setting allocation size to %lu is not allowed. Recommended size is %lu\n",
+ NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 7),
+ NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
+ return size;
+ } else if (val > NUM_PAGES_TO_ALLOC) {
+ pr_warn("Setting allocation size to larger than %lu is not recommended\n",
+ NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
+ }
+ m->options.alloc_size = val;
+ }
+
+ return size;
+}
+
+static ssize_t ttm_pool_show(struct kobject *kobj, struct attribute *attr,
+ char *buffer)
+{
+ struct ttm_pool_manager *m =
+ container_of(kobj, struct ttm_pool_manager, kobj);
+ unsigned val = 0;
+
+ if (attr == &ttm_page_pool_max)
+ val = m->options.max_size;
+ else if (attr == &ttm_page_pool_small)
+ val = m->options.small;
+ else if (attr == &ttm_page_pool_alloc_size)
+ val = m->options.alloc_size;
+
+ val = val * (PAGE_SIZE >> 10);
+
+ return snprintf(buffer, PAGE_SIZE, "%u\n", val);
+}
+
+static const struct sysfs_ops ttm_pool_sysfs_ops = {
+ .show = &ttm_pool_show,
+ .store = &ttm_pool_store,
+};
+
+static struct kobj_type ttm_pool_kobj_type = {
+ .release = &ttm_pool_kobj_release,
+ .sysfs_ops = &ttm_pool_sysfs_ops,
+ .default_attrs = ttm_pool_attrs,
+};
+
+#ifndef CONFIG_X86
+static int set_pages_array_wb(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+ int i;
+
+ for (i = 0; i < addrinarray; i++)
+ unmap_page_from_agp(pages[i]);
+#endif
+ return 0;
+}
+
+static int set_pages_array_wc(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+ int i;
+
+ for (i = 0; i < addrinarray; i++)
+ map_page_into_agp(pages[i]);
+#endif
+ return 0;
+}
+
+static int set_pages_array_uc(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+ int i;
+
+ for (i = 0; i < addrinarray; i++)
+ map_page_into_agp(pages[i]);
+#endif
+ return 0;
+}
+#endif /* for !CONFIG_X86 */
+
+static int ttm_set_pages_caching(struct dma_pool *pool,
+ struct page **pages, unsigned cpages)
+{
+ int r = 0;
+ /* Set page caching */
+ if (pool->type & IS_UC) {
+ r = set_pages_array_uc(pages, cpages);
+ if (r)
+ pr_err("%s: Failed to set %d pages to uc!\n",
+ pool->dev_name, cpages);
+ }
+ if (pool->type & IS_WC) {
+ r = set_pages_array_wc(pages, cpages);
+ if (r)
+ pr_err("%s: Failed to set %d pages to wc!\n",
+ pool->dev_name, cpages);
+ }
+ return r;
+}
+
+static void __ttm_dma_free_page(struct dma_pool *pool, struct dma_page *d_page)
+{
+ dma_addr_t dma = d_page->dma;
+ dma_free_coherent(pool->dev, pool->size, d_page->vaddr, dma);
+
+ kfree(d_page);
+ d_page = NULL;
+}
+static struct dma_page *__ttm_dma_alloc_page(struct dma_pool *pool)
+{
+ struct dma_page *d_page;
+
+ d_page = kmalloc(sizeof(struct dma_page), GFP_KERNEL);
+ if (!d_page)
+ return NULL;
+
+ d_page->vaddr = dma_alloc_coherent(pool->dev, pool->size,
+ &d_page->dma,
+ pool->gfp_flags);
+ if (d_page->vaddr)
+ d_page->p = virt_to_page(d_page->vaddr);
+ else {
+ kfree(d_page);
+ d_page = NULL;
+ }
+ return d_page;
+}
+static enum pool_type ttm_to_type(int flags, enum ttm_caching_state cstate)
+{
+ enum pool_type type = IS_UNDEFINED;
+
+ if (flags & TTM_PAGE_FLAG_DMA32)
+ type |= IS_DMA32;
+ if (cstate == tt_cached)
+ type |= IS_CACHED;
+ else if (cstate == tt_uncached)
+ type |= IS_UC;
+ else
+ type |= IS_WC;
+
+ return type;
+}
+
+static void ttm_pool_update_free_locked(struct dma_pool *pool,
+ unsigned freed_pages)
+{
+ pool->npages_free -= freed_pages;
+ pool->nfrees += freed_pages;
+
+}
+
+/* set memory back to wb and free the pages. */
+static void ttm_dma_pages_put(struct dma_pool *pool, struct list_head *d_pages,
+ struct page *pages[], unsigned npages)
+{
+ struct dma_page *d_page, *tmp;
+
+ /* Don't set WB on WB page pool. */
+ if (npages && !(pool->type & IS_CACHED) &&
+ set_pages_array_wb(pages, npages))
+ pr_err("%s: Failed to set %d pages to wb!\n",
+ pool->dev_name, npages);
+
+ list_for_each_entry_safe(d_page, tmp, d_pages, page_list) {
+ list_del(&d_page->page_list);
+ __ttm_dma_free_page(pool, d_page);
+ }
+}
+
+static void ttm_dma_page_put(struct dma_pool *pool, struct dma_page *d_page)
+{
+ /* Don't set WB on WB page pool. */
+ if (!(pool->type & IS_CACHED) && set_pages_array_wb(&d_page->p, 1))
+ pr_err("%s: Failed to set %d pages to wb!\n",
+ pool->dev_name, 1);
+
+ list_del(&d_page->page_list);
+ __ttm_dma_free_page(pool, d_page);
+}
+
+/*
+ * Free pages from pool.
+ *
+ * To prevent hogging the ttm_swap process we only free NUM_PAGES_TO_ALLOC
+ * number of pages in one go.
+ *
+ * @pool: to free the pages from
+ * @nr_free: If set to true will free all pages in pool
+ * @use_static: Safe to use static buffer
+ **/
+static unsigned ttm_dma_page_pool_free(struct dma_pool *pool, unsigned nr_free,
+ bool use_static)
+{
+ static struct page *static_buf[NUM_PAGES_TO_ALLOC];
+ unsigned long irq_flags;
+ struct dma_page *dma_p, *tmp;
+ struct page **pages_to_free;
+ struct list_head d_pages;
+ unsigned freed_pages = 0,
+ npages_to_free = nr_free;
+
+ if (NUM_PAGES_TO_ALLOC < nr_free)
+ npages_to_free = NUM_PAGES_TO_ALLOC;
+#if 0
+ if (nr_free > 1) {
+ pr_debug("%s: (%s:%d) Attempting to free %d (%d) pages\n",
+ pool->dev_name, pool->name, current->pid,
+ npages_to_free, nr_free);
+ }
+#endif
+ if (use_static)
+ pages_to_free = static_buf;
+ else
+ pages_to_free = kmalloc(npages_to_free * sizeof(struct page *),
+ GFP_KERNEL);
+
+ if (!pages_to_free) {
+ pr_err("%s: Failed to allocate memory for pool free operation\n",
+ pool->dev_name);
+ return 0;
+ }
+ INIT_LIST_HEAD(&d_pages);
+restart:
+ spin_lock_irqsave(&pool->lock, irq_flags);
+
+ /* We picking the oldest ones off the list */
+ list_for_each_entry_safe_reverse(dma_p, tmp, &pool->free_list,
+ page_list) {
+ if (freed_pages >= npages_to_free)
+ break;
+
+ /* Move the dma_page from one list to another. */
+ list_move(&dma_p->page_list, &d_pages);
+
+ pages_to_free[freed_pages++] = dma_p->p;
+ /* We can only remove NUM_PAGES_TO_ALLOC at a time. */
+ if (freed_pages >= NUM_PAGES_TO_ALLOC) {
+
+ ttm_pool_update_free_locked(pool, freed_pages);
+ /**
+ * Because changing page caching is costly
+ * we unlock the pool to prevent stalling.
+ */
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+ ttm_dma_pages_put(pool, &d_pages, pages_to_free,
+ freed_pages);
+
+ INIT_LIST_HEAD(&d_pages);
+
+ if (likely(nr_free != FREE_ALL_PAGES))
+ nr_free -= freed_pages;
+
+ if (NUM_PAGES_TO_ALLOC >= nr_free)
+ npages_to_free = nr_free;
+ else
+ npages_to_free = NUM_PAGES_TO_ALLOC;
+
+ freed_pages = 0;
+
+ /* free all so restart the processing */
+ if (nr_free)
+ goto restart;
+
+ /* Not allowed to fall through or break because
+ * following context is inside spinlock while we are
+ * outside here.
+ */
+ goto out;
+
+ }
+ }
+
+ /* remove range of pages from the pool */
+ if (freed_pages) {
+ ttm_pool_update_free_locked(pool, freed_pages);
+ nr_free -= freed_pages;
+ }
+
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+ if (freed_pages)
+ ttm_dma_pages_put(pool, &d_pages, pages_to_free, freed_pages);
+out:
+ if (pages_to_free != static_buf)
+ kfree(pages_to_free);
+ return nr_free;
+}
+
+static void ttm_dma_free_pool(struct device *dev, enum pool_type type)
+{
+ struct device_pools *p;
+ struct dma_pool *pool;
+
+ if (!dev)
+ return;
+
+ mutex_lock(&_manager->lock);
+ list_for_each_entry_reverse(p, &_manager->pools, pools) {
+ if (p->dev != dev)
+ continue;
+ pool = p->pool;
+ if (pool->type != type)
+ continue;
+
+ list_del(&p->pools);
+ kfree(p);
+ _manager->npools--;
+ break;
+ }
+ list_for_each_entry_reverse(pool, &dev->dma_pools, pools) {
+ if (pool->type != type)
+ continue;
+ /* Takes a spinlock.. */
+ /* OK to use static buffer since global mutex is held. */
+ ttm_dma_page_pool_free(pool, FREE_ALL_PAGES, true);
+ WARN_ON(((pool->npages_in_use + pool->npages_free) != 0));
+ /* This code path is called after _all_ references to the
+ * struct device has been dropped - so nobody should be
+ * touching it. In case somebody is trying to _add_ we are
+ * guarded by the mutex. */
+ list_del(&pool->pools);
+ kfree(pool);
+ break;
+ }
+ mutex_unlock(&_manager->lock);
+}
+
+/*
+ * On free-ing of the 'struct device' this deconstructor is run.
+ * Albeit the pool might have already been freed earlier.
+ */
+static void ttm_dma_pool_release(struct device *dev, void *res)
+{
+ struct dma_pool *pool = *(struct dma_pool **)res;
+
+ if (pool)
+ ttm_dma_free_pool(dev, pool->type);
+}
+
+static int ttm_dma_pool_match(struct device *dev, void *res, void *match_data)
+{
+ return *(struct dma_pool **)res == match_data;
+}
+
+static struct dma_pool *ttm_dma_pool_init(struct device *dev, gfp_t flags,
+ enum pool_type type)
+{
+ char *n[] = {"wc", "uc", "cached", " dma32", "unknown",};
+ enum pool_type t[] = {IS_WC, IS_UC, IS_CACHED, IS_DMA32, IS_UNDEFINED};
+ struct device_pools *sec_pool = NULL;
+ struct dma_pool *pool = NULL, **ptr;
+ unsigned i;
+ int ret = -ENODEV;
+ char *p;
+
+ if (!dev)
+ return NULL;
+
+ ptr = devres_alloc(ttm_dma_pool_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return NULL;
+
+ ret = -ENOMEM;
+
+ pool = kmalloc_node(sizeof(struct dma_pool), GFP_KERNEL,
+ dev_to_node(dev));
+ if (!pool)
+ goto err_mem;
+
+ sec_pool = kmalloc_node(sizeof(struct device_pools), GFP_KERNEL,
+ dev_to_node(dev));
+ if (!sec_pool)
+ goto err_mem;
+
+ INIT_LIST_HEAD(&sec_pool->pools);
+ sec_pool->dev = dev;
+ sec_pool->pool = pool;
+
+ INIT_LIST_HEAD(&pool->free_list);
+ INIT_LIST_HEAD(&pool->inuse_list);
+ INIT_LIST_HEAD(&pool->pools);
+ spin_lock_init(&pool->lock);
+ pool->dev = dev;
+ pool->npages_free = pool->npages_in_use = 0;
+ pool->nfrees = 0;
+ pool->gfp_flags = flags;
+ pool->size = PAGE_SIZE;
+ pool->type = type;
+ pool->nrefills = 0;
+ p = pool->name;
+ for (i = 0; i < 5; i++) {
+ if (type & t[i]) {
+ p += snprintf(p, sizeof(pool->name) - (p - pool->name),
+ "%s", n[i]);
+ }
+ }
+ *p = 0;
+ /* We copy the name for pr_ calls b/c when dma_pool_destroy is called
+ * - the kobj->name has already been deallocated.*/
+ snprintf(pool->dev_name, sizeof(pool->dev_name), "%s %s",
+ dev_driver_string(dev), dev_name(dev));
+ mutex_lock(&_manager->lock);
+ /* You can get the dma_pool from either the global: */
+ list_add(&sec_pool->pools, &_manager->pools);
+ _manager->npools++;
+ /* or from 'struct device': */
+ list_add(&pool->pools, &dev->dma_pools);
+ mutex_unlock(&_manager->lock);
+
+ *ptr = pool;
+ devres_add(dev, ptr);
+
+ return pool;
+err_mem:
+ devres_free(ptr);
+ kfree(sec_pool);
+ kfree(pool);
+ return ERR_PTR(ret);
+}
+
+static struct dma_pool *ttm_dma_find_pool(struct device *dev,
+ enum pool_type type)
+{
+ struct dma_pool *pool, *tmp, *found = NULL;
+
+ if (type == IS_UNDEFINED)
+ return found;
+
+ /* NB: We iterate on the 'struct dev' which has no spinlock, but
+ * it does have a kref which we have taken. The kref is taken during
+ * graphic driver loading - in the drm_pci_init it calls either
+ * pci_dev_get or pci_register_driver which both end up taking a kref
+ * on 'struct device'.
+ *
+ * On teardown, the graphic drivers end up quiescing the TTM (put_pages)
+ * and calls the dev_res deconstructors: ttm_dma_pool_release. The nice
+ * thing is at that point of time there are no pages associated with the
+ * driver so this function will not be called.
+ */
+ list_for_each_entry_safe(pool, tmp, &dev->dma_pools, pools) {
+ if (pool->type != type)
+ continue;
+ found = pool;
+ break;
+ }
+ return found;
+}
+
+/*
+ * Free pages the pages that failed to change the caching state. If there
+ * are pages that have changed their caching state already put them to the
+ * pool.
+ */
+static void ttm_dma_handle_caching_state_failure(struct dma_pool *pool,
+ struct list_head *d_pages,
+ struct page **failed_pages,
+ unsigned cpages)
+{
+ struct dma_page *d_page, *tmp;
+ struct page *p;
+ unsigned i = 0;
+
+ p = failed_pages[0];
+ if (!p)
+ return;
+ /* Find the failed page. */
+ list_for_each_entry_safe(d_page, tmp, d_pages, page_list) {
+ if (d_page->p != p)
+ continue;
+ /* .. and then progress over the full list. */
+ list_del(&d_page->page_list);
+ __ttm_dma_free_page(pool, d_page);
+ if (++i < cpages)
+ p = failed_pages[i];
+ else
+ break;
+ }
+
+}
+
+/*
+ * Allocate 'count' pages, and put 'need' number of them on the
+ * 'pages' and as well on the 'dma_address' starting at 'dma_offset' offset.
+ * The full list of pages should also be on 'd_pages'.
+ * We return zero for success, and negative numbers as errors.
+ */
+static int ttm_dma_pool_alloc_new_pages(struct dma_pool *pool,
+ struct list_head *d_pages,
+ unsigned count)
+{
+ struct page **caching_array;
+ struct dma_page *dma_p;
+ struct page *p;
+ int r = 0;
+ unsigned i, cpages;
+ unsigned max_cpages = min(count,
+ (unsigned)(PAGE_SIZE/sizeof(struct page *)));
+
+ /* allocate array for page caching change */
+ caching_array = kmalloc(max_cpages*sizeof(struct page *), GFP_KERNEL);
+
+ if (!caching_array) {
+ pr_err("%s: Unable to allocate table for new pages\n",
+ pool->dev_name);
+ return -ENOMEM;
+ }
+
+ if (count > 1) {
+ pr_debug("%s: (%s:%d) Getting %d pages\n",
+ pool->dev_name, pool->name, current->pid, count);
+ }
+
+ for (i = 0, cpages = 0; i < count; ++i) {
+ dma_p = __ttm_dma_alloc_page(pool);
+ if (!dma_p) {
+ pr_err("%s: Unable to get page %u\n",
+ pool->dev_name, i);
+
+ /* store already allocated pages in the pool after
+ * setting the caching state */
+ if (cpages) {
+ r = ttm_set_pages_caching(pool, caching_array,
+ cpages);
+ if (r)
+ ttm_dma_handle_caching_state_failure(
+ pool, d_pages, caching_array,
+ cpages);
+ }
+ r = -ENOMEM;
+ goto out;
+ }
+ p = dma_p->p;
+#ifdef CONFIG_HIGHMEM
+ /* gfp flags of highmem page should never be dma32 so we
+ * we should be fine in such case
+ */
+ if (!PageHighMem(p))
+#endif
+ {
+ caching_array[cpages++] = p;
+ if (cpages == max_cpages) {
+ /* Note: Cannot hold the spinlock */
+ r = ttm_set_pages_caching(pool, caching_array,
+ cpages);
+ if (r) {
+ ttm_dma_handle_caching_state_failure(
+ pool, d_pages, caching_array,
+ cpages);
+ goto out;
+ }
+ cpages = 0;
+ }
+ }
+ list_add(&dma_p->page_list, d_pages);
+ }
+
+ if (cpages) {
+ r = ttm_set_pages_caching(pool, caching_array, cpages);
+ if (r)
+ ttm_dma_handle_caching_state_failure(pool, d_pages,
+ caching_array, cpages);
+ }
+out:
+ kfree(caching_array);
+ return r;
+}
+
+/*
+ * @return count of pages still required to fulfill the request.
+ */
+static int ttm_dma_page_pool_fill_locked(struct dma_pool *pool,
+ unsigned long *irq_flags)
+{
+ unsigned count = _manager->options.small;
+ int r = pool->npages_free;
+
+ if (count > pool->npages_free) {
+ struct list_head d_pages;
+
+ INIT_LIST_HEAD(&d_pages);
+
+ spin_unlock_irqrestore(&pool->lock, *irq_flags);
+
+ /* Returns how many more are neccessary to fulfill the
+ * request. */
+ r = ttm_dma_pool_alloc_new_pages(pool, &d_pages, count);
+
+ spin_lock_irqsave(&pool->lock, *irq_flags);
+ if (!r) {
+ /* Add the fresh to the end.. */
+ list_splice(&d_pages, &pool->free_list);
+ ++pool->nrefills;
+ pool->npages_free += count;
+ r = count;
+ } else {
+ struct dma_page *d_page;
+ unsigned cpages = 0;
+
+ pr_err("%s: Failed to fill %s pool (r:%d)!\n",
+ pool->dev_name, pool->name, r);
+
+ list_for_each_entry(d_page, &d_pages, page_list) {
+ cpages++;
+ }
+ list_splice_tail(&d_pages, &pool->free_list);
+ pool->npages_free += cpages;
+ r = cpages;
+ }
+ }
+ return r;
+}
+
+/*
+ * @return count of pages still required to fulfill the request.
+ * The populate list is actually a stack (not that is matters as TTM
+ * allocates one page at a time.
+ */
+static int ttm_dma_pool_get_pages(struct dma_pool *pool,
+ struct ttm_dma_tt *ttm_dma,
+ unsigned index)
+{
+ struct dma_page *d_page;
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+ unsigned long irq_flags;
+ int count, r = -ENOMEM;
+
+ spin_lock_irqsave(&pool->lock, irq_flags);
+ count = ttm_dma_page_pool_fill_locked(pool, &irq_flags);
+ if (count) {
+ d_page = list_first_entry(&pool->free_list, struct dma_page, page_list);
+ ttm->pages[index] = d_page->p;
+ ttm_dma->cpu_address[index] = d_page->vaddr;
+ ttm_dma->dma_address[index] = d_page->dma;
+ list_move_tail(&d_page->page_list, &ttm_dma->pages_list);
+ r = 0;
+ pool->npages_in_use += 1;
+ pool->npages_free -= 1;
+ }
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+ return r;
+}
+
+/*
+ * On success pages list will hold count number of correctly
+ * cached pages. On failure will hold the negative return value (-ENOMEM, etc).
+ */
+int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev)
+{
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+ struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
+ struct dma_pool *pool;
+ enum pool_type type;
+ unsigned i;
+ gfp_t gfp_flags;
+ int ret;
+
+ if (ttm->state != tt_unpopulated)
+ return 0;
+
+ type = ttm_to_type(ttm->page_flags, ttm->caching_state);
+ if (ttm->page_flags & TTM_PAGE_FLAG_DMA32)
+ gfp_flags = GFP_USER | GFP_DMA32;
+ else
+ gfp_flags = GFP_HIGHUSER;
+ if (ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
+ gfp_flags |= __GFP_ZERO;
+
+ pool = ttm_dma_find_pool(dev, type);
+ if (!pool) {
+ pool = ttm_dma_pool_init(dev, gfp_flags, type);
+ if (IS_ERR_OR_NULL(pool)) {
+ return -ENOMEM;
+ }
+ }
+
+ INIT_LIST_HEAD(&ttm_dma->pages_list);
+ for (i = 0; i < ttm->num_pages; ++i) {
+ ret = ttm_dma_pool_get_pages(pool, ttm_dma, i);
+ if (ret != 0) {
+ ttm_dma_unpopulate(ttm_dma, dev);
+ return -ENOMEM;
+ }
+
+ ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
+ false, false);
+ if (unlikely(ret != 0)) {
+ ttm_dma_unpopulate(ttm_dma, dev);
+ return -ENOMEM;
+ }
+ }
+
+ if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+ ret = ttm_tt_swapin(ttm);
+ if (unlikely(ret != 0)) {
+ ttm_dma_unpopulate(ttm_dma, dev);
+ return ret;
+ }
+ }
+
+ ttm->state = tt_unbound;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ttm_dma_populate);
+
+/* Put all pages in pages list to correct pool to wait for reuse */
+void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev)
+{
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+ struct dma_pool *pool;
+ struct dma_page *d_page, *next;
+ enum pool_type type;
+ bool is_cached = false;
+ unsigned count = 0, i, npages = 0;
+ unsigned long irq_flags;
+
+ type = ttm_to_type(ttm->page_flags, ttm->caching_state);
+ pool = ttm_dma_find_pool(dev, type);
+ if (!pool)
+ return;
+
+ is_cached = (ttm_dma_find_pool(pool->dev,
+ ttm_to_type(ttm->page_flags, tt_cached)) == pool);
+
+ /* make sure pages array match list and count number of pages */
+ list_for_each_entry(d_page, &ttm_dma->pages_list, page_list) {
+ ttm->pages[count] = d_page->p;
+ count++;
+ }
+
+ spin_lock_irqsave(&pool->lock, irq_flags);
+ pool->npages_in_use -= count;
+ if (is_cached) {
+ pool->nfrees += count;
+ } else {
+ pool->npages_free += count;
+ list_splice(&ttm_dma->pages_list, &pool->free_list);
+ npages = count;
+ if (pool->npages_free > _manager->options.max_size) {
+ npages = pool->npages_free - _manager->options.max_size;
+ /* free at least NUM_PAGES_TO_ALLOC number of pages
+ * to reduce calls to set_memory_wb */
+ if (npages < NUM_PAGES_TO_ALLOC)
+ npages = NUM_PAGES_TO_ALLOC;
+ }
+ }
+ spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+ if (is_cached) {
+ list_for_each_entry_safe(d_page, next, &ttm_dma->pages_list, page_list) {
+ ttm_mem_global_free_page(ttm->glob->mem_glob,
+ d_page->p);
+ ttm_dma_page_put(pool, d_page);
+ }
+ } else {
+ for (i = 0; i < count; i++) {
+ ttm_mem_global_free_page(ttm->glob->mem_glob,
+ ttm->pages[i]);
+ }
+ }
+
+ INIT_LIST_HEAD(&ttm_dma->pages_list);
+ for (i = 0; i < ttm->num_pages; i++) {
+ ttm->pages[i] = NULL;
+ ttm_dma->cpu_address[i] = 0;
+ ttm_dma->dma_address[i] = 0;
+ }
+
+ /* shrink pool if necessary (only on !is_cached pools)*/
+ if (npages)
+ ttm_dma_page_pool_free(pool, npages, false);
+ ttm->state = tt_unpopulated;
+}
+EXPORT_SYMBOL_GPL(ttm_dma_unpopulate);
+
+/**
+ * Callback for mm to request pool to reduce number of page held.
+ *
+ * XXX: (dchinner) Deadlock warning!
+ *
+ * I'm getting sadder as I hear more pathetical whimpers about needing per-pool
+ * shrinkers
+ */
+static unsigned long
+ttm_dma_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
+{
+ static unsigned start_pool;
+ unsigned idx = 0;
+ unsigned pool_offset;
+ unsigned shrink_pages = sc->nr_to_scan;
+ struct device_pools *p;
+ unsigned long freed = 0;
+
+ if (list_empty(&_manager->pools))
+ return SHRINK_STOP;
+
+ if (!mutex_trylock(&_manager->lock))
+ return SHRINK_STOP;
+ if (!_manager->npools)
+ goto out;
+ pool_offset = ++start_pool % _manager->npools;
+ list_for_each_entry(p, &_manager->pools, pools) {
+ unsigned nr_free;
+
+ if (!p->dev)
+ continue;
+ if (shrink_pages == 0)
+ break;
+ /* Do it in round-robin fashion. */
+ if (++idx < pool_offset)
+ continue;
+ nr_free = shrink_pages;
+ /* OK to use static buffer since global mutex is held. */
+ shrink_pages = ttm_dma_page_pool_free(p->pool, nr_free, true);
+ freed += nr_free - shrink_pages;
+
+ pr_debug("%s: (%s:%d) Asked to shrink %d, have %d more to go\n",
+ p->pool->dev_name, p->pool->name, current->pid,
+ nr_free, shrink_pages);
+ }
+out:
+ mutex_unlock(&_manager->lock);
+ return freed;
+}
+
+static unsigned long
+ttm_dma_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
+{
+ struct device_pools *p;
+ unsigned long count = 0;
+
+ if (!mutex_trylock(&_manager->lock))
+ return 0;
+ list_for_each_entry(p, &_manager->pools, pools)
+ count += p->pool->npages_free;
+ mutex_unlock(&_manager->lock);
+ return count;
+}
+
+static void ttm_dma_pool_mm_shrink_init(struct ttm_pool_manager *manager)
+{
+ manager->mm_shrink.count_objects = ttm_dma_pool_shrink_count;
+ manager->mm_shrink.scan_objects = &ttm_dma_pool_shrink_scan;
+ manager->mm_shrink.seeks = 1;
+ register_shrinker(&manager->mm_shrink);
+}
+
+static void ttm_dma_pool_mm_shrink_fini(struct ttm_pool_manager *manager)
+{
+ unregister_shrinker(&manager->mm_shrink);
+}
+
+int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
+{
+ int ret = -ENOMEM;
+
+ WARN_ON(_manager);
+
+ pr_info("Initializing DMA pool allocator\n");
+
+ _manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
+ if (!_manager)
+ goto err;
+
+ mutex_init(&_manager->lock);
+ INIT_LIST_HEAD(&_manager->pools);
+
+ _manager->options.max_size = max_pages;
+ _manager->options.small = SMALL_ALLOCATION;
+ _manager->options.alloc_size = NUM_PAGES_TO_ALLOC;
+
+ /* This takes care of auto-freeing the _manager */
+ ret = kobject_init_and_add(&_manager->kobj, &ttm_pool_kobj_type,
+ &glob->kobj, "dma_pool");
+ if (unlikely(ret != 0)) {
+ kobject_put(&_manager->kobj);
+ goto err;
+ }
+ ttm_dma_pool_mm_shrink_init(_manager);
+ return 0;
+err:
+ return ret;
+}
+
+void ttm_dma_page_alloc_fini(void)
+{
+ struct device_pools *p, *t;
+
+ pr_info("Finalizing DMA pool allocator\n");
+ ttm_dma_pool_mm_shrink_fini(_manager);
+
+ list_for_each_entry_safe_reverse(p, t, &_manager->pools, pools) {
+ dev_dbg(p->dev, "(%s:%d) Freeing.\n", p->pool->name,
+ current->pid);
+ WARN_ON(devres_destroy(p->dev, ttm_dma_pool_release,
+ ttm_dma_pool_match, p->pool));
+ ttm_dma_free_pool(p->dev, p->pool->type);
+ }
+ kobject_put(&_manager->kobj);
+ _manager = NULL;
+}
+
+int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
+{
+ struct device_pools *p;
+ struct dma_pool *pool = NULL;
+ char *h[] = {"pool", "refills", "pages freed", "inuse", "available",
+ "name", "virt", "busaddr"};
+
+ if (!_manager) {
+ seq_printf(m, "No pool allocator running.\n");
+ return 0;
+ }
+ seq_printf(m, "%13s %12s %13s %8s %8s %8s\n",
+ h[0], h[1], h[2], h[3], h[4], h[5]);
+ mutex_lock(&_manager->lock);
+ list_for_each_entry(p, &_manager->pools, pools) {
+ struct device *dev = p->dev;
+ if (!dev)
+ continue;
+ pool = p->pool;
+ seq_printf(m, "%13s %12ld %13ld %8d %8d %8s\n",
+ pool->name, pool->nrefills,
+ pool->nfrees, pool->npages_in_use,
+ pool->npages_free,
+ pool->dev_name);
+ }
+ mutex_unlock(&_manager->lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ttm_dma_page_alloc_debugfs);
+
+#endif
diff --git a/kernel/drivers/gpu/drm/ttm/ttm_tt.c b/kernel/drivers/gpu/drm/ttm/ttm_tt.c
new file mode 100644
index 000000000..bf080abc8
--- /dev/null
+++ b/kernel/drivers/gpu/drm/ttm/ttm_tt.c
@@ -0,0 +1,402 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <linux/sched.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+#include <linux/shmem_fs.h>
+#include <linux/file.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <drm/drm_cache.h>
+#include <drm/drm_mem_util.h>
+#include <drm/ttm/ttm_module.h>
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/ttm/ttm_page_alloc.h>
+
+/**
+ * Allocates storage for pointers to the pages that back the ttm.
+ */
+static void ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
+{
+ ttm->pages = drm_calloc_large(ttm->num_pages, sizeof(void*));
+}
+
+static void ttm_dma_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
+{
+ ttm->ttm.pages = drm_calloc_large(ttm->ttm.num_pages,
+ sizeof(*ttm->ttm.pages) +
+ sizeof(*ttm->dma_address) +
+ sizeof(*ttm->cpu_address));
+ ttm->cpu_address = (void *) (ttm->ttm.pages + ttm->ttm.num_pages);
+ ttm->dma_address = (void *) (ttm->cpu_address + ttm->ttm.num_pages);
+}
+
+#ifdef CONFIG_X86
+static inline int ttm_tt_set_page_caching(struct page *p,
+ enum ttm_caching_state c_old,
+ enum ttm_caching_state c_new)
+{
+ int ret = 0;
+
+ if (PageHighMem(p))
+ return 0;
+
+ if (c_old != tt_cached) {
+ /* p isn't in the default caching state, set it to
+ * writeback first to free its current memtype. */
+
+ ret = set_pages_wb(p, 1);
+ if (ret)
+ return ret;
+ }
+
+ if (c_new == tt_wc)
+ ret = set_memory_wc((unsigned long) page_address(p), 1);
+ else if (c_new == tt_uncached)
+ ret = set_pages_uc(p, 1);
+
+ return ret;
+}
+#else /* CONFIG_X86 */
+static inline int ttm_tt_set_page_caching(struct page *p,
+ enum ttm_caching_state c_old,
+ enum ttm_caching_state c_new)
+{
+ return 0;
+}
+#endif /* CONFIG_X86 */
+
+/*
+ * Change caching policy for the linear kernel map
+ * for range of pages in a ttm.
+ */
+
+static int ttm_tt_set_caching(struct ttm_tt *ttm,
+ enum ttm_caching_state c_state)
+{
+ int i, j;
+ struct page *cur_page;
+ int ret;
+
+ if (ttm->caching_state == c_state)
+ return 0;
+
+ if (ttm->state == tt_unpopulated) {
+ /* Change caching but don't populate */
+ ttm->caching_state = c_state;
+ return 0;
+ }
+
+ if (ttm->caching_state == tt_cached)
+ drm_clflush_pages(ttm->pages, ttm->num_pages);
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ cur_page = ttm->pages[i];
+ if (likely(cur_page != NULL)) {
+ ret = ttm_tt_set_page_caching(cur_page,
+ ttm->caching_state,
+ c_state);
+ if (unlikely(ret != 0))
+ goto out_err;
+ }
+ }
+
+ ttm->caching_state = c_state;
+
+ return 0;
+
+out_err:
+ for (j = 0; j < i; ++j) {
+ cur_page = ttm->pages[j];
+ if (likely(cur_page != NULL)) {
+ (void)ttm_tt_set_page_caching(cur_page, c_state,
+ ttm->caching_state);
+ }
+ }
+
+ return ret;
+}
+
+int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement)
+{
+ enum ttm_caching_state state;
+
+ if (placement & TTM_PL_FLAG_WC)
+ state = tt_wc;
+ else if (placement & TTM_PL_FLAG_UNCACHED)
+ state = tt_uncached;
+ else
+ state = tt_cached;
+
+ return ttm_tt_set_caching(ttm, state);
+}
+EXPORT_SYMBOL(ttm_tt_set_placement_caching);
+
+void ttm_tt_destroy(struct ttm_tt *ttm)
+{
+ if (unlikely(ttm == NULL))
+ return;
+
+ if (ttm->state == tt_bound) {
+ ttm_tt_unbind(ttm);
+ }
+
+ if (ttm->state == tt_unbound)
+ ttm_tt_unpopulate(ttm);
+
+ if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
+ ttm->swap_storage)
+ fput(ttm->swap_storage);
+
+ ttm->swap_storage = NULL;
+ ttm->func->destroy(ttm);
+}
+
+int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
+ unsigned long size, uint32_t page_flags,
+ struct page *dummy_read_page)
+{
+ ttm->bdev = bdev;
+ ttm->glob = bdev->glob;
+ ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ ttm->caching_state = tt_cached;
+ ttm->page_flags = page_flags;
+ ttm->dummy_read_page = dummy_read_page;
+ ttm->state = tt_unpopulated;
+ ttm->swap_storage = NULL;
+
+ ttm_tt_alloc_page_directory(ttm);
+ if (!ttm->pages) {
+ ttm_tt_destroy(ttm);
+ pr_err("Failed allocating page table\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_tt_init);
+
+void ttm_tt_fini(struct ttm_tt *ttm)
+{
+ drm_free_large(ttm->pages);
+ ttm->pages = NULL;
+}
+EXPORT_SYMBOL(ttm_tt_fini);
+
+int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
+ unsigned long size, uint32_t page_flags,
+ struct page *dummy_read_page)
+{
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+
+ ttm->bdev = bdev;
+ ttm->glob = bdev->glob;
+ ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ ttm->caching_state = tt_cached;
+ ttm->page_flags = page_flags;
+ ttm->dummy_read_page = dummy_read_page;
+ ttm->state = tt_unpopulated;
+ ttm->swap_storage = NULL;
+
+ INIT_LIST_HEAD(&ttm_dma->pages_list);
+ ttm_dma_tt_alloc_page_directory(ttm_dma);
+ if (!ttm->pages) {
+ ttm_tt_destroy(ttm);
+ pr_err("Failed allocating page table\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_dma_tt_init);
+
+void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma)
+{
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+
+ drm_free_large(ttm->pages);
+ ttm->pages = NULL;
+ ttm_dma->cpu_address = NULL;
+ ttm_dma->dma_address = NULL;
+}
+EXPORT_SYMBOL(ttm_dma_tt_fini);
+
+void ttm_tt_unbind(struct ttm_tt *ttm)
+{
+ int ret;
+
+ if (ttm->state == tt_bound) {
+ ret = ttm->func->unbind(ttm);
+ BUG_ON(ret);
+ ttm->state = tt_unbound;
+ }
+}
+
+int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
+{
+ int ret = 0;
+
+ if (!ttm)
+ return -EINVAL;
+
+ if (ttm->state == tt_bound)
+ return 0;
+
+ ret = ttm->bdev->driver->ttm_tt_populate(ttm);
+ if (ret)
+ return ret;
+
+ ret = ttm->func->bind(ttm, bo_mem);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ttm->state = tt_bound;
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_tt_bind);
+
+int ttm_tt_swapin(struct ttm_tt *ttm)
+{
+ struct address_space *swap_space;
+ struct file *swap_storage;
+ struct page *from_page;
+ struct page *to_page;
+ int i;
+ int ret = -ENOMEM;
+
+ swap_storage = ttm->swap_storage;
+ BUG_ON(swap_storage == NULL);
+
+ swap_space = file_inode(swap_storage)->i_mapping;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ from_page = shmem_read_mapping_page(swap_space, i);
+ if (IS_ERR(from_page)) {
+ ret = PTR_ERR(from_page);
+ goto out_err;
+ }
+ to_page = ttm->pages[i];
+ if (unlikely(to_page == NULL))
+ goto out_err;
+
+ copy_highpage(to_page, from_page);
+ page_cache_release(from_page);
+ }
+
+ if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))
+ fput(swap_storage);
+ ttm->swap_storage = NULL;
+ ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
+
+ return 0;
+out_err:
+ return ret;
+}
+
+int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
+{
+ struct address_space *swap_space;
+ struct file *swap_storage;
+ struct page *from_page;
+ struct page *to_page;
+ int i;
+ int ret = -ENOMEM;
+
+ BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
+ BUG_ON(ttm->caching_state != tt_cached);
+
+ if (!persistent_swap_storage) {
+ swap_storage = shmem_file_setup("ttm swap",
+ ttm->num_pages << PAGE_SHIFT,
+ 0);
+ if (unlikely(IS_ERR(swap_storage))) {
+ pr_err("Failed allocating swap storage\n");
+ return PTR_ERR(swap_storage);
+ }
+ } else
+ swap_storage = persistent_swap_storage;
+
+ swap_space = file_inode(swap_storage)->i_mapping;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ from_page = ttm->pages[i];
+ if (unlikely(from_page == NULL))
+ continue;
+ to_page = shmem_read_mapping_page(swap_space, i);
+ if (unlikely(IS_ERR(to_page))) {
+ ret = PTR_ERR(to_page);
+ goto out_err;
+ }
+ copy_highpage(to_page, from_page);
+ set_page_dirty(to_page);
+ mark_page_accessed(to_page);
+ page_cache_release(to_page);
+ }
+
+ ttm_tt_unpopulate(ttm);
+ ttm->swap_storage = swap_storage;
+ ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
+ if (persistent_swap_storage)
+ ttm->page_flags |= TTM_PAGE_FLAG_PERSISTENT_SWAP;
+
+ return 0;
+out_err:
+ if (!persistent_swap_storage)
+ fput(swap_storage);
+
+ return ret;
+}
+
+static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
+{
+ pgoff_t i;
+ struct page **page = ttm->pages;
+
+ if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+ return;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ (*page)->mapping = NULL;
+ (*page++)->index = 0;
+ }
+}
+
+void ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+ if (ttm->state == tt_unpopulated)
+ return;
+
+ ttm_tt_clear_mapping(ttm);
+ ttm->bdev->driver->ttm_tt_unpopulate(ttm);
+}