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-rw-r--r--drivers/gpu/drm/ttm/Makefile8
-rw-r--r--drivers/gpu/drm/ttm/ttm_agp_backend.c150
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo.c1698
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo_util.c561
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo_vm.c454
-rw-r--r--drivers/gpu/drm/ttm/ttm_global.c114
-rw-r--r--drivers/gpu/drm/ttm/ttm_memory.c234
-rw-r--r--drivers/gpu/drm/ttm/ttm_module.c50
-rw-r--r--drivers/gpu/drm/ttm/ttm_tt.c635
9 files changed, 3904 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/Makefile b/drivers/gpu/drm/ttm/Makefile
new file mode 100644
index 00000000000..b0a9de7a57c
--- /dev/null
+++ b/drivers/gpu/drm/ttm/Makefile
@@ -0,0 +1,8 @@
+#
+# 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_global.o
+
+obj-$(CONFIG_DRM_TTM) += ttm.o
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
new file mode 100644
index 00000000000..e8f6d2229d8
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -0,0 +1,150 @@
+/**************************************************************************
+ *
+ * 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.
+ */
+
+#include "ttm/ttm_module.h"
+#include "ttm/ttm_bo_driver.h"
+#ifdef TTM_HAS_AGP
+#include "ttm/ttm_placement.h"
+#include <linux/agp_backend.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <asm/agp.h>
+
+struct ttm_agp_backend {
+ struct ttm_backend backend;
+ struct agp_memory *mem;
+ struct agp_bridge_data *bridge;
+};
+
+static int ttm_agp_populate(struct ttm_backend *backend,
+ unsigned long num_pages, struct page **pages,
+ struct page *dummy_read_page)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+ struct page **cur_page, **last_page = pages + num_pages;
+ struct agp_memory *mem;
+
+ mem = agp_allocate_memory(agp_be->bridge, num_pages, AGP_USER_MEMORY);
+ if (unlikely(mem == NULL))
+ return -ENOMEM;
+
+ mem->page_count = 0;
+ for (cur_page = pages; cur_page < last_page; ++cur_page) {
+ struct page *page = *cur_page;
+ if (!page)
+ page = dummy_read_page;
+
+ mem->memory[mem->page_count++] =
+ phys_to_gart(page_to_phys(page));
+ }
+ agp_be->mem = mem;
+ return 0;
+}
+
+static int ttm_agp_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+ struct agp_memory *mem = agp_be->mem;
+ int cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
+ int ret;
+
+ mem->is_flushed = 1;
+ mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
+
+ ret = agp_bind_memory(mem, bo_mem->mm_node->start);
+ if (ret)
+ printk(KERN_ERR TTM_PFX "AGP Bind memory failed.\n");
+
+ return ret;
+}
+
+static int ttm_agp_unbind(struct ttm_backend *backend)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+
+ if (agp_be->mem->is_bound)
+ return agp_unbind_memory(agp_be->mem);
+ else
+ return 0;
+}
+
+static void ttm_agp_clear(struct ttm_backend *backend)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+ struct agp_memory *mem = agp_be->mem;
+
+ if (mem) {
+ ttm_agp_unbind(backend);
+ agp_free_memory(mem);
+ }
+ agp_be->mem = NULL;
+}
+
+static void ttm_agp_destroy(struct ttm_backend *backend)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+
+ if (agp_be->mem)
+ ttm_agp_clear(backend);
+ kfree(agp_be);
+}
+
+static struct ttm_backend_func ttm_agp_func = {
+ .populate = ttm_agp_populate,
+ .clear = ttm_agp_clear,
+ .bind = ttm_agp_bind,
+ .unbind = ttm_agp_unbind,
+ .destroy = ttm_agp_destroy,
+};
+
+struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
+ struct agp_bridge_data *bridge)
+{
+ 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->backend.func = &ttm_agp_func;
+ agp_be->backend.bdev = bdev;
+ return &agp_be->backend;
+}
+EXPORT_SYMBOL(ttm_agp_backend_init);
+
+#endif
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
new file mode 100644
index 00000000000..1587aeca7be
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -0,0 +1,1698 @@
+/**************************************************************************
+ *
+ * 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>
+ */
+
+#include "ttm/ttm_module.h"
+#include "ttm/ttm_bo_driver.h"
+#include "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>
+
+#define TTM_ASSERT_LOCKED(param)
+#define TTM_DEBUG(fmt, arg...)
+#define TTM_BO_HASH_ORDER 13
+
+static int ttm_bo_setup_vm(struct ttm_buffer_object *bo);
+static void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
+static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
+
+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;
+
+ 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->sync_obj != NULL);
+ 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);
+ if (bo->destroy)
+ bo->destroy(bo);
+ else {
+ ttm_mem_global_free(bdev->mem_glob, bo->acc_size, false);
+ kfree(bo);
+ }
+}
+
+int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible)
+{
+
+ if (interruptible) {
+ int ret = 0;
+
+ ret = wait_event_interruptible(bo->event_queue,
+ atomic_read(&bo->reserved) == 0);
+ if (unlikely(ret != 0))
+ return -ERESTART;
+ } else {
+ wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0);
+ }
+ return 0;
+}
+
+static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man;
+
+ BUG_ON(!atomic_read(&bo->reserved));
+
+ 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, &bdev->swap_lru);
+ kref_get(&bo->list_kref);
+ }
+ }
+}
+
+/**
+ * Call with the lru_lock held.
+ */
+
+static 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;
+}
+
+int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
+ bool interruptible,
+ bool no_wait, bool use_sequence, uint32_t sequence)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ int ret;
+
+ while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
+ if (use_sequence && bo->seq_valid &&
+ (sequence - bo->val_seq < (1 << 31))) {
+ return -EAGAIN;
+ }
+
+ if (no_wait)
+ return -EBUSY;
+
+ spin_unlock(&bdev->lru_lock);
+ ret = ttm_bo_wait_unreserved(bo, interruptible);
+ spin_lock(&bdev->lru_lock);
+
+ if (unlikely(ret))
+ return ret;
+ }
+
+ if (use_sequence) {
+ bo->val_seq = sequence;
+ bo->seq_valid = true;
+ } else {
+ bo->seq_valid = false;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_reserve);
+
+static void ttm_bo_ref_bug(struct kref *list_kref)
+{
+ BUG();
+}
+
+int ttm_bo_reserve(struct ttm_buffer_object *bo,
+ bool interruptible,
+ bool no_wait, bool use_sequence, uint32_t sequence)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ int put_count = 0;
+ int ret;
+
+ spin_lock(&bdev->lru_lock);
+ ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence,
+ sequence);
+ if (likely(ret == 0))
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&bdev->lru_lock);
+
+ while (put_count--)
+ kref_put(&bo->list_kref, ttm_bo_ref_bug);
+
+ return ret;
+}
+
+void ttm_bo_unreserve(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+
+ spin_lock(&bdev->lru_lock);
+ ttm_bo_add_to_lru(bo);
+ atomic_set(&bo->reserved, 0);
+ wake_up_all(&bo->event_queue);
+ spin_unlock(&bdev->lru_lock);
+}
+EXPORT_SYMBOL(ttm_bo_unreserve);
+
+/*
+ * 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;
+ int ret = 0;
+ uint32_t page_flags = 0;
+
+ TTM_ASSERT_LOCKED(&bo->mutex);
+ bo->ttm = NULL;
+
+ 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 = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
+ page_flags, bdev->dummy_read_page);
+ if (unlikely(bo->ttm == NULL))
+ ret = -ENOMEM;
+ break;
+ case ttm_bo_type_user:
+ bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
+ page_flags | TTM_PAGE_FLAG_USER,
+ bdev->dummy_read_page);
+ if (unlikely(bo->ttm == NULL))
+ ret = -ENOMEM;
+ break;
+
+ ret = ttm_tt_set_user(bo->ttm, current,
+ bo->buffer_start, bo->num_pages);
+ if (unlikely(ret != 0))
+ ttm_tt_destroy(bo->ttm);
+ break;
+ default:
+ printk(KERN_ERR TTM_PFX "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)
+{
+ 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))
+ ttm_bo_unmap_virtual(bo);
+
+ /*
+ * Create and bind a ttm if required.
+ */
+
+ if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) {
+ ret = ttm_bo_add_ttm(bo, false);
+ if (ret)
+ goto out_err;
+
+ ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
+ if (ret)
+ return ret;
+
+ 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) {
+
+ struct ttm_mem_reg *old_mem = &bo->mem;
+ uint32_t save_flags = old_mem->placement;
+
+ *old_mem = *mem;
+ mem->mm_node = NULL;
+ ttm_flag_masked(&save_flags, mem->placement,
+ TTM_PL_MASK_MEMTYPE);
+ goto moved;
+ }
+
+ }
+
+ if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
+ !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
+ ret = ttm_bo_move_ttm(bo, evict, no_wait, mem);
+ else if (bdev->driver->move)
+ ret = bdev->driver->move(bo, evict, interruptible,
+ no_wait, mem);
+ else
+ ret = ttm_bo_move_memcpy(bo, evict, no_wait, mem);
+
+ if (ret)
+ goto out_err;
+
+moved:
+ if (bo->evicted) {
+ ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
+ if (ret)
+ printk(KERN_ERR TTM_PFX "Can not flush read caches\n");
+ bo->evicted = false;
+ }
+
+ if (bo->mem.mm_node) {
+ spin_lock(&bo->lock);
+ bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) +
+ bdev->man[bo->mem.mem_type].gpu_offset;
+ bo->cur_placement = bo->mem.placement;
+ spin_unlock(&bo->lock);
+ }
+
+ 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;
+}
+
+/**
+ * If bo idle, remove from delayed- and lru lists, and unref.
+ * If not idle, and already on delayed list, do nothing.
+ * If not idle, and not on delayed list, put on delayed list,
+ * up the list_kref and schedule a delayed list check.
+ */
+
+static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_driver *driver = bdev->driver;
+ int ret;
+
+ spin_lock(&bo->lock);
+ (void) ttm_bo_wait(bo, false, false, !remove_all);
+
+ if (!bo->sync_obj) {
+ int put_count;
+
+ spin_unlock(&bo->lock);
+
+ spin_lock(&bdev->lru_lock);
+ ret = ttm_bo_reserve_locked(bo, false, false, false, 0);
+ BUG_ON(ret);
+ if (bo->ttm)
+ ttm_tt_unbind(bo->ttm);
+
+ if (!list_empty(&bo->ddestroy)) {
+ list_del_init(&bo->ddestroy);
+ kref_put(&bo->list_kref, ttm_bo_ref_bug);
+ }
+ if (bo->mem.mm_node) {
+ drm_mm_put_block(bo->mem.mm_node);
+ bo->mem.mm_node = NULL;
+ }
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&bdev->lru_lock);
+
+ atomic_set(&bo->reserved, 0);
+
+ while (put_count--)
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+
+ return 0;
+ }
+
+ spin_lock(&bdev->lru_lock);
+ if (list_empty(&bo->ddestroy)) {
+ void *sync_obj = bo->sync_obj;
+ void *sync_obj_arg = bo->sync_obj_arg;
+
+ kref_get(&bo->list_kref);
+ list_add_tail(&bo->ddestroy, &bdev->ddestroy);
+ spin_unlock(&bdev->lru_lock);
+ spin_unlock(&bo->lock);
+
+ if (sync_obj)
+ driver->sync_obj_flush(sync_obj, sync_obj_arg);
+ schedule_delayed_work(&bdev->wq,
+ ((HZ / 100) < 1) ? 1 : HZ / 100);
+ ret = 0;
+
+ } else {
+ spin_unlock(&bdev->lru_lock);
+ spin_unlock(&bo->lock);
+ ret = -EBUSY;
+ }
+
+ return ret;
+}
+
+/**
+ * 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_buffer_object *entry, *nentry;
+ struct list_head *list, *next;
+ int ret;
+
+ spin_lock(&bdev->lru_lock);
+ list_for_each_safe(list, next, &bdev->ddestroy) {
+ entry = list_entry(list, struct ttm_buffer_object, ddestroy);
+ nentry = NULL;
+
+ /*
+ * Protect the next list entry from destruction while we
+ * unlock the lru_lock.
+ */
+
+ if (next != &bdev->ddestroy) {
+ nentry = list_entry(next, struct ttm_buffer_object,
+ ddestroy);
+ kref_get(&nentry->list_kref);
+ }
+ kref_get(&entry->list_kref);
+
+ spin_unlock(&bdev->lru_lock);
+ ret = ttm_bo_cleanup_refs(entry, remove_all);
+ kref_put(&entry->list_kref, ttm_bo_release_list);
+
+ spin_lock(&bdev->lru_lock);
+ if (nentry) {
+ bool next_onlist = !list_empty(next);
+ spin_unlock(&bdev->lru_lock);
+ kref_put(&nentry->list_kref, ttm_bo_release_list);
+ spin_lock(&bdev->lru_lock);
+ /*
+ * Someone might have raced us and removed the
+ * next entry from the list. We don't bother restarting
+ * list traversal.
+ */
+
+ if (!next_onlist)
+ break;
+ }
+ if (ret)
+ break;
+ }
+ ret = !list_empty(&bdev->ddestroy);
+ spin_unlock(&bdev->lru_lock);
+
+ 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;
+
+ if (likely(bo->vm_node != NULL)) {
+ rb_erase(&bo->vm_rb, &bdev->addr_space_rb);
+ drm_mm_put_block(bo->vm_node);
+ bo->vm_node = NULL;
+ }
+ write_unlock(&bdev->vm_lock);
+ ttm_bo_cleanup_refs(bo, false);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ write_lock(&bdev->vm_lock);
+}
+
+void ttm_bo_unref(struct ttm_buffer_object **p_bo)
+{
+ struct ttm_buffer_object *bo = *p_bo;
+ struct ttm_bo_device *bdev = bo->bdev;
+
+ *p_bo = NULL;
+ write_lock(&bdev->vm_lock);
+ kref_put(&bo->kref, ttm_bo_release);
+ write_unlock(&bdev->vm_lock);
+}
+EXPORT_SYMBOL(ttm_bo_unref);
+
+static int ttm_bo_evict(struct ttm_buffer_object *bo, unsigned mem_type,
+ bool interruptible, bool no_wait)
+{
+ int ret = 0;
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_reg evict_mem;
+ uint32_t proposed_placement;
+
+ if (bo->mem.mem_type != mem_type)
+ goto out;
+
+ spin_lock(&bo->lock);
+ ret = ttm_bo_wait(bo, false, interruptible, no_wait);
+ spin_unlock(&bo->lock);
+
+ if (ret && ret != -ERESTART) {
+ printk(KERN_ERR TTM_PFX "Failed to expire sync object before "
+ "buffer eviction.\n");
+ goto out;
+ }
+
+ BUG_ON(!atomic_read(&bo->reserved));
+
+ evict_mem = bo->mem;
+ evict_mem.mm_node = NULL;
+
+ proposed_placement = bdev->driver->evict_flags(bo);
+
+ ret = ttm_bo_mem_space(bo, proposed_placement,
+ &evict_mem, interruptible, no_wait);
+ if (unlikely(ret != 0 && ret != -ERESTART))
+ ret = ttm_bo_mem_space(bo, TTM_PL_FLAG_SYSTEM,
+ &evict_mem, interruptible, no_wait);
+
+ if (ret) {
+ if (ret != -ERESTART)
+ printk(KERN_ERR TTM_PFX
+ "Failed to find memory space for "
+ "buffer 0x%p eviction.\n", bo);
+ goto out;
+ }
+
+ ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
+ no_wait);
+ if (ret) {
+ if (ret != -ERESTART)
+ printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
+ goto out;
+ }
+
+ spin_lock(&bdev->lru_lock);
+ if (evict_mem.mm_node) {
+ drm_mm_put_block(evict_mem.mm_node);
+ evict_mem.mm_node = NULL;
+ }
+ spin_unlock(&bdev->lru_lock);
+ bo->evicted = true;
+out:
+ return ret;
+}
+
+/**
+ * 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_bo_device *bdev,
+ struct ttm_mem_reg *mem,
+ uint32_t mem_type,
+ bool interruptible, bool no_wait)
+{
+ struct drm_mm_node *node;
+ struct ttm_buffer_object *entry;
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct list_head *lru;
+ unsigned long num_pages = mem->num_pages;
+ int put_count = 0;
+ int ret;
+
+retry_pre_get:
+ ret = drm_mm_pre_get(&man->manager);
+ if (unlikely(ret != 0))
+ return ret;
+
+ spin_lock(&bdev->lru_lock);
+ do {
+ node = drm_mm_search_free(&man->manager, num_pages,
+ mem->page_alignment, 1);
+ if (node)
+ break;
+
+ lru = &man->lru;
+ if (list_empty(lru))
+ break;
+
+ entry = list_first_entry(lru, struct ttm_buffer_object, lru);
+ kref_get(&entry->list_kref);
+
+ ret =
+ ttm_bo_reserve_locked(entry, interruptible, no_wait,
+ false, 0);
+
+ if (likely(ret == 0))
+ put_count = ttm_bo_del_from_lru(entry);
+
+ spin_unlock(&bdev->lru_lock);
+
+ if (unlikely(ret != 0))
+ return ret;
+
+ while (put_count--)
+ kref_put(&entry->list_kref, ttm_bo_ref_bug);
+
+ ret = ttm_bo_evict(entry, mem_type, interruptible, no_wait);
+
+ ttm_bo_unreserve(entry);
+
+ kref_put(&entry->list_kref, ttm_bo_release_list);
+ if (ret)
+ return ret;
+
+ spin_lock(&bdev->lru_lock);
+ } while (1);
+
+ if (!node) {
+ spin_unlock(&bdev->lru_lock);
+ return -ENOMEM;
+ }
+
+ node = drm_mm_get_block_atomic(node, num_pages, mem->page_alignment);
+ if (unlikely(!node)) {
+ spin_unlock(&bdev->lru_lock);
+ goto retry_pre_get;
+ }
+
+ spin_unlock(&bdev->lru_lock);
+ mem->mm_node = node;
+ mem->mem_type = mem_type;
+ return 0;
+}
+
+static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
+ bool disallow_fixed,
+ uint32_t mem_type,
+ uint32_t mask, uint32_t *res_mask)
+{
+ uint32_t cur_flags = ttm_bo_type_flags(mem_type);
+
+ if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed)
+ return false;
+
+ if ((cur_flags & mask & TTM_PL_MASK_MEM) == 0)
+ return false;
+
+ if ((mask & man->available_caching) == 0)
+ return false;
+ if (mask & man->default_caching)
+ cur_flags |= man->default_caching;
+ else if (mask & TTM_PL_FLAG_CACHED)
+ cur_flags |= TTM_PL_FLAG_CACHED;
+ else if (mask & TTM_PL_FLAG_WC)
+ cur_flags |= TTM_PL_FLAG_WC;
+ else
+ cur_flags |= TTM_PL_FLAG_UNCACHED;
+
+ *res_mask = 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,
+ uint32_t proposed_placement,
+ struct ttm_mem_reg *mem,
+ bool interruptible, bool no_wait)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man;
+
+ uint32_t num_prios = bdev->driver->num_mem_type_prio;
+ const uint32_t *prios = bdev->driver->mem_type_prio;
+ uint32_t i;
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ uint32_t cur_flags = 0;
+ bool type_found = false;
+ bool type_ok = false;
+ bool has_eagain = false;
+ struct drm_mm_node *node = NULL;
+ int ret;
+
+ mem->mm_node = NULL;
+ for (i = 0; i < num_prios; ++i) {
+ mem_type = prios[i];
+ man = &bdev->man[mem_type];
+
+ type_ok = ttm_bo_mt_compatible(man,
+ bo->type == ttm_bo_type_user,
+ mem_type, proposed_placement,
+ &cur_flags);
+
+ if (!type_ok)
+ continue;
+
+ if (mem_type == TTM_PL_SYSTEM)
+ break;
+
+ if (man->has_type && man->use_type) {
+ type_found = true;
+ do {
+ ret = drm_mm_pre_get(&man->manager);
+ if (unlikely(ret))
+ return ret;
+
+ spin_lock(&bdev->lru_lock);
+ node = drm_mm_search_free(&man->manager,
+ mem->num_pages,
+ mem->page_alignment,
+ 1);
+ if (unlikely(!node)) {
+ spin_unlock(&bdev->lru_lock);
+ break;
+ }
+ node = drm_mm_get_block_atomic(node,
+ mem->num_pages,
+ mem->
+ page_alignment);
+ spin_unlock(&bdev->lru_lock);
+ } while (!node);
+ }
+ if (node)
+ break;
+ }
+
+ if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) {
+ mem->mm_node = node;
+ mem->mem_type = mem_type;
+ mem->placement = cur_flags;
+ return 0;
+ }
+
+ if (!type_found)
+ return -EINVAL;
+
+ num_prios = bdev->driver->num_mem_busy_prio;
+ prios = bdev->driver->mem_busy_prio;
+
+ for (i = 0; i < num_prios; ++i) {
+ mem_type = prios[i];
+ man = &bdev->man[mem_type];
+
+ if (!man->has_type)
+ continue;
+
+ if (!ttm_bo_mt_compatible(man,
+ bo->type == ttm_bo_type_user,
+ mem_type,
+ proposed_placement, &cur_flags))
+ continue;
+
+ ret = ttm_bo_mem_force_space(bdev, mem, mem_type,
+ interruptible, no_wait);
+
+ if (ret == 0 && mem->mm_node) {
+ mem->placement = cur_flags;
+ return 0;
+ }
+
+ if (ret == -ERESTART)
+ has_eagain = true;
+ }
+
+ ret = (has_eagain) ? -ERESTART : -ENOMEM;
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_mem_space);
+
+int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait)
+{
+ int ret = 0;
+
+ if ((atomic_read(&bo->cpu_writers) > 0) && no_wait)
+ return -EBUSY;
+
+ ret = wait_event_interruptible(bo->event_queue,
+ atomic_read(&bo->cpu_writers) == 0);
+
+ if (ret == -ERESTARTSYS)
+ ret = -ERESTART;
+
+ return ret;
+}
+
+int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
+ uint32_t proposed_placement,
+ bool interruptible, bool no_wait)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ int ret = 0;
+ struct ttm_mem_reg mem;
+
+ BUG_ON(!atomic_read(&bo->reserved));
+
+ /*
+ * FIXME: It's possible to pipeline buffer moves.
+ * Have the driver move function wait for idle when necessary,
+ * instead of doing it here.
+ */
+
+ spin_lock(&bo->lock);
+ ret = ttm_bo_wait(bo, false, interruptible, no_wait);
+ spin_unlock(&bo->lock);
+
+ if (ret)
+ return ret;
+
+ mem.num_pages = bo->num_pages;
+ mem.size = mem.num_pages << PAGE_SHIFT;
+ mem.page_alignment = bo->mem.page_alignment;
+
+ /*
+ * Determine where to move the buffer.
+ */
+
+ ret = ttm_bo_mem_space(bo, proposed_placement, &mem,
+ interruptible, no_wait);
+ if (ret)
+ goto out_unlock;
+
+ ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait);
+
+out_unlock:
+ if (ret && mem.mm_node) {
+ spin_lock(&bdev->lru_lock);
+ drm_mm_put_block(mem.mm_node);
+ spin_unlock(&bdev->lru_lock);
+ }
+ return ret;
+}
+
+static int ttm_bo_mem_compat(uint32_t proposed_placement,
+ struct ttm_mem_reg *mem)
+{
+ if ((proposed_placement & mem->placement & TTM_PL_MASK_MEM) == 0)
+ return 0;
+ if ((proposed_placement & mem->placement & TTM_PL_MASK_CACHING) == 0)
+ return 0;
+
+ return 1;
+}
+
+int ttm_buffer_object_validate(struct ttm_buffer_object *bo,
+ uint32_t proposed_placement,
+ bool interruptible, bool no_wait)
+{
+ int ret;
+
+ BUG_ON(!atomic_read(&bo->reserved));
+ bo->proposed_placement = proposed_placement;
+
+ TTM_DEBUG("Proposed placement 0x%08lx, Old flags 0x%08lx\n",
+ (unsigned long)proposed_placement,
+ (unsigned long)bo->mem.placement);
+
+ /*
+ * Check whether we need to move buffer.
+ */
+
+ if (!ttm_bo_mem_compat(bo->proposed_placement, &bo->mem)) {
+ ret = ttm_bo_move_buffer(bo, bo->proposed_placement,
+ interruptible, no_wait);
+ if (ret) {
+ if (ret != -ERESTART)
+ printk(KERN_ERR TTM_PFX
+ "Failed moving buffer. "
+ "Proposed placement 0x%08x\n",
+ bo->proposed_placement);
+ if (ret == -ENOMEM)
+ printk(KERN_ERR TTM_PFX
+ "Out of aperture space or "
+ "DRM memory quota.\n");
+ return ret;
+ }
+ }
+
+ /*
+ * 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;
+ }
+ /*
+ * Validation has succeeded, move the access and other
+ * non-mapping-related flag bits from the proposed flags to
+ * the active flags
+ */
+
+ ttm_flag_masked(&bo->mem.placement, bo->proposed_placement,
+ ~TTM_PL_MASK_MEMTYPE);
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_buffer_object_validate);
+
+int
+ttm_bo_check_placement(struct ttm_buffer_object *bo,
+ uint32_t set_flags, uint32_t clr_flags)
+{
+ uint32_t new_mask = set_flags | clr_flags;
+
+ if ((bo->type == ttm_bo_type_user) &&
+ (clr_flags & TTM_PL_FLAG_CACHED)) {
+ printk(KERN_ERR TTM_PFX
+ "User buffers require cache-coherent memory.\n");
+ return -EINVAL;
+ }
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if (new_mask & TTM_PL_FLAG_NO_EVICT) {
+ printk(KERN_ERR TTM_PFX "Need to be root to modify"
+ " NO_EVICT status.\n");
+ return -EINVAL;
+ }
+
+ if ((clr_flags & bo->mem.placement & TTM_PL_MASK_MEMTYPE) &&
+ (bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
+ printk(KERN_ERR TTM_PFX
+ "Incompatible memory specification"
+ " for NO_EVICT buffer.\n");
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+int ttm_buffer_object_init(struct ttm_bo_device *bdev,
+ struct ttm_buffer_object *bo,
+ unsigned long size,
+ enum ttm_bo_type type,
+ uint32_t flags,
+ uint32_t page_alignment,
+ unsigned long buffer_start,
+ bool interruptible,
+ struct file *persistant_swap_storage,
+ size_t acc_size,
+ void (*destroy) (struct ttm_buffer_object *))
+{
+ int ret = 0;
+ unsigned long num_pages;
+
+ size += buffer_start & ~PAGE_MASK;
+ num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ if (num_pages == 0) {
+ printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n");
+ return -EINVAL;
+ }
+ bo->destroy = destroy;
+
+ spin_lock_init(&bo->lock);
+ kref_init(&bo->kref);
+ kref_init(&bo->list_kref);
+ atomic_set(&bo->cpu_writers, 0);
+ atomic_set(&bo->reserved, 1);
+ init_waitqueue_head(&bo->event_queue);
+ INIT_LIST_HEAD(&bo->lru);
+ INIT_LIST_HEAD(&bo->ddestroy);
+ INIT_LIST_HEAD(&bo->swap);
+ bo->bdev = bdev;
+ bo->type = type;
+ bo->num_pages = num_pages;
+ 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->buffer_start = buffer_start & PAGE_MASK;
+ bo->priv_flags = 0;
+ bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
+ bo->seq_valid = false;
+ bo->persistant_swap_storage = persistant_swap_storage;
+ bo->acc_size = acc_size;
+
+ ret = ttm_bo_check_placement(bo, flags, 0ULL);
+ if (unlikely(ret != 0))
+ goto out_err;
+
+ /*
+ * If no caching attributes are set, accept any form of caching.
+ */
+
+ if ((flags & TTM_PL_MASK_CACHING) == 0)
+ flags |= TTM_PL_MASK_CACHING;
+
+ /*
+ * For ttm_bo_type_device buffers, allocate
+ * address space from the device.
+ */
+
+ if (bo->type == ttm_bo_type_device) {
+ ret = ttm_bo_setup_vm(bo);
+ if (ret)
+ goto out_err;
+ }
+
+ ret = ttm_buffer_object_validate(bo, flags, interruptible, false);
+ if (ret)
+ goto out_err;
+
+ ttm_bo_unreserve(bo);
+ return 0;
+
+out_err:
+ ttm_bo_unreserve(bo);
+ ttm_bo_unref(&bo);
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_buffer_object_init);
+
+static inline size_t ttm_bo_size(struct ttm_bo_device *bdev,
+ unsigned long num_pages)
+{
+ size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) &
+ PAGE_MASK;
+
+ return bdev->ttm_bo_size + 2 * page_array_size;
+}
+
+int ttm_buffer_object_create(struct ttm_bo_device *bdev,
+ unsigned long size,
+ enum ttm_bo_type type,
+ uint32_t flags,
+ uint32_t page_alignment,
+ unsigned long buffer_start,
+ bool interruptible,
+ struct file *persistant_swap_storage,
+ struct ttm_buffer_object **p_bo)
+{
+ struct ttm_buffer_object *bo;
+ int ret;
+ struct ttm_mem_global *mem_glob = bdev->mem_glob;
+
+ size_t acc_size =
+ ttm_bo_size(bdev, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
+ ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false, false);
+ if (unlikely(ret != 0))
+ return ret;
+
+ bo = kzalloc(sizeof(*bo), GFP_KERNEL);
+
+ if (unlikely(bo == NULL)) {
+ ttm_mem_global_free(mem_glob, acc_size, false);
+ return -ENOMEM;
+ }
+
+ ret = ttm_buffer_object_init(bdev, bo, size, type, flags,
+ page_alignment, buffer_start,
+ interruptible,
+ persistant_swap_storage, acc_size, NULL);
+ if (likely(ret == 0))
+ *p_bo = bo;
+
+ return ret;
+}
+
+static int ttm_bo_leave_list(struct ttm_buffer_object *bo,
+ uint32_t mem_type, bool allow_errors)
+{
+ int ret;
+
+ spin_lock(&bo->lock);
+ ret = ttm_bo_wait(bo, false, false, false);
+ spin_unlock(&bo->lock);
+
+ if (ret && allow_errors)
+ goto out;
+
+ if (bo->mem.mem_type == mem_type)
+ ret = ttm_bo_evict(bo, mem_type, false, false);
+
+ if (ret) {
+ if (allow_errors) {
+ goto out;
+ } else {
+ ret = 0;
+ printk(KERN_ERR TTM_PFX "Cleanup eviction failed\n");
+ }
+ }
+
+out:
+ return ret;
+}
+
+static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
+ struct list_head *head,
+ unsigned mem_type, bool allow_errors)
+{
+ struct ttm_buffer_object *entry;
+ int ret;
+ int put_count;
+
+ /*
+ * Can't use standard list traversal since we're unlocking.
+ */
+
+ spin_lock(&bdev->lru_lock);
+
+ while (!list_empty(head)) {
+ entry = list_first_entry(head, struct ttm_buffer_object, lru);
+ kref_get(&entry->list_kref);
+ ret = ttm_bo_reserve_locked(entry, false, false, false, 0);
+ put_count = ttm_bo_del_from_lru(entry);
+ spin_unlock(&bdev->lru_lock);
+ while (put_count--)
+ kref_put(&entry->list_kref, ttm_bo_ref_bug);
+ BUG_ON(ret);
+ ret = ttm_bo_leave_list(entry, mem_type, allow_errors);
+ ttm_bo_unreserve(entry);
+ kref_put(&entry->list_kref, ttm_bo_release_list);
+ spin_lock(&bdev->lru_lock);
+ }
+
+ spin_unlock(&bdev->lru_lock);
+
+ return 0;
+}
+
+int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ int ret = -EINVAL;
+
+ if (mem_type >= TTM_NUM_MEM_TYPES) {
+ printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type);
+ return ret;
+ }
+
+ if (!man->has_type) {
+ printk(KERN_ERR TTM_PFX "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, &man->lru, mem_type, false);
+
+ spin_lock(&bdev->lru_lock);
+ if (drm_mm_clean(&man->manager))
+ drm_mm_takedown(&man->manager);
+ else
+ ret = -EBUSY;
+
+ spin_unlock(&bdev->lru_lock);
+ }
+
+ 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) {
+ printk(KERN_ERR TTM_PFX
+ "Illegal memory manager memory type %u.\n",
+ mem_type);
+ return -EINVAL;
+ }
+
+ if (!man->has_type) {
+ printk(KERN_ERR TTM_PFX
+ "Memory type %u has not been initialized.\n",
+ mem_type);
+ return 0;
+ }
+
+ return ttm_bo_force_list_clean(bdev, &man->lru, mem_type, true);
+}
+EXPORT_SYMBOL(ttm_bo_evict_mm);
+
+int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
+ unsigned long p_offset, unsigned long p_size)
+{
+ int ret = -EINVAL;
+ struct ttm_mem_type_manager *man;
+
+ if (type >= TTM_NUM_MEM_TYPES) {
+ printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type);
+ return ret;
+ }
+
+ man = &bdev->man[type];
+ if (man->has_type) {
+ printk(KERN_ERR TTM_PFX
+ "Memory manager already initialized for type %d\n",
+ type);
+ return ret;
+ }
+
+ ret = bdev->driver->init_mem_type(bdev, type, man);
+ if (ret)
+ return ret;
+
+ ret = 0;
+ if (type != TTM_PL_SYSTEM) {
+ if (!p_size) {
+ printk(KERN_ERR TTM_PFX
+ "Zero size memory manager type %d\n",
+ type);
+ return ret;
+ }
+ ret = drm_mm_init(&man->manager, p_offset, 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);
+
+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;
+
+ 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;
+ printk(KERN_ERR TTM_PFX
+ "DRM memory manager type %d "
+ "is not clean.\n", i);
+ }
+ man->has_type = false;
+ }
+ }
+
+ if (!cancel_delayed_work(&bdev->wq))
+ flush_scheduled_work();
+
+ while (ttm_bo_delayed_delete(bdev, true))
+ ;
+
+ spin_lock(&bdev->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(&bdev->lru_lock);
+
+ ttm_mem_unregister_shrink(bdev->mem_glob, &bdev->shrink);
+ BUG_ON(!drm_mm_clean(&bdev->addr_space_mm));
+ write_lock(&bdev->vm_lock);
+ drm_mm_takedown(&bdev->addr_space_mm);
+ write_unlock(&bdev->vm_lock);
+
+ __free_page(bdev->dummy_read_page);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_device_release);
+
+/*
+ * This function is intended to be called on drm driver load.
+ * If you decide to call it from firstopen, you must protect the call
+ * from a potentially racing ttm_bo_driver_finish in lastclose.
+ * (This may happen on X server restart).
+ */
+
+int ttm_bo_device_init(struct ttm_bo_device *bdev,
+ struct ttm_mem_global *mem_glob,
+ struct ttm_bo_driver *driver, uint64_t file_page_offset)
+{
+ int ret = -EINVAL;
+
+ bdev->dummy_read_page = NULL;
+ rwlock_init(&bdev->vm_lock);
+ spin_lock_init(&bdev->lru_lock);
+
+ bdev->driver = driver;
+ bdev->mem_glob = mem_glob;
+
+ memset(bdev->man, 0, sizeof(bdev->man));
+
+ bdev->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
+ if (unlikely(bdev->dummy_read_page == NULL)) {
+ ret = -ENOMEM;
+ goto out_err0;
+ }
+
+ /*
+ * Initialize the system memory buffer type.
+ * Other types need to be driver / IOCTL initialized.
+ */
+ ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0, 0);
+ if (unlikely(ret != 0))
+ goto out_err1;
+
+ bdev->addr_space_rb = RB_ROOT;
+ ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
+ if (unlikely(ret != 0))
+ goto out_err2;
+
+ INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
+ bdev->nice_mode = true;
+ INIT_LIST_HEAD(&bdev->ddestroy);
+ INIT_LIST_HEAD(&bdev->swap_lru);
+ bdev->dev_mapping = NULL;
+ ttm_mem_init_shrink(&bdev->shrink, ttm_bo_swapout);
+ ret = ttm_mem_register_shrink(mem_glob, &bdev->shrink);
+ if (unlikely(ret != 0)) {
+ printk(KERN_ERR TTM_PFX
+ "Could not register buffer object swapout.\n");
+ goto out_err2;
+ }
+
+ bdev->ttm_bo_extra_size =
+ ttm_round_pot(sizeof(struct ttm_tt)) +
+ ttm_round_pot(sizeof(struct ttm_backend));
+
+ bdev->ttm_bo_size = bdev->ttm_bo_extra_size +
+ ttm_round_pot(sizeof(struct ttm_buffer_object));
+
+ return 0;
+out_err2:
+ ttm_bo_clean_mm(bdev, 0);
+out_err1:
+ __free_page(bdev->dummy_read_page);
+out_err0:
+ 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;
+}
+
+int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
+ struct ttm_mem_reg *mem,
+ unsigned long *bus_base,
+ unsigned long *bus_offset, unsigned long *bus_size)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+
+ *bus_size = 0;
+ if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+ return -EINVAL;
+
+ if (ttm_mem_reg_is_pci(bdev, mem)) {
+ *bus_offset = mem->mm_node->start << PAGE_SHIFT;
+ *bus_size = mem->num_pages << PAGE_SHIFT;
+ *bus_base = man->io_offset;
+ }
+
+ return 0;
+}
+
+void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ loff_t offset = (loff_t) bo->addr_space_offset;
+ loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT;
+
+ if (!bdev->dev_mapping)
+ return;
+
+ unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1);
+}
+
+static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct rb_node **cur = &bdev->addr_space_rb.rb_node;
+ struct rb_node *parent = NULL;
+ struct ttm_buffer_object *cur_bo;
+ unsigned long offset = bo->vm_node->start;
+ unsigned long cur_offset;
+
+ while (*cur) {
+ parent = *cur;
+ cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb);
+ cur_offset = cur_bo->vm_node->start;
+ if (offset < cur_offset)
+ cur = &parent->rb_left;
+ else if (offset > cur_offset)
+ cur = &parent->rb_right;
+ else
+ BUG();
+ }
+
+ rb_link_node(&bo->vm_rb, parent, cur);
+ rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb);
+}
+
+/**
+ * ttm_bo_setup_vm:
+ *
+ * @bo: the buffer to allocate address space for
+ *
+ * Allocate address space in the drm device so that applications
+ * can mmap the buffer and access the contents. This only
+ * applies to ttm_bo_type_device objects as others are not
+ * placed in the drm device address space.
+ */
+
+static int ttm_bo_setup_vm(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ int ret;
+
+retry_pre_get:
+ ret = drm_mm_pre_get(&bdev->addr_space_mm);
+ if (unlikely(ret != 0))
+ return ret;
+
+ write_lock(&bdev->vm_lock);
+ bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm,
+ bo->mem.num_pages, 0, 0);
+
+ if (unlikely(bo->vm_node == NULL)) {
+ ret = -ENOMEM;
+ goto out_unlock;
+ }
+
+ bo->vm_node = drm_mm_get_block_atomic(bo->vm_node,
+ bo->mem.num_pages, 0);
+
+ if (unlikely(bo->vm_node == NULL)) {
+ write_unlock(&bdev->vm_lock);
+ goto retry_pre_get;
+ }
+
+ ttm_bo_vm_insert_rb(bo);
+ write_unlock(&bdev->vm_lock);
+ bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT;
+
+ return 0;
+out_unlock:
+ write_unlock(&bdev->vm_lock);
+ return ret;
+}
+
+int ttm_bo_wait(struct ttm_buffer_object *bo,
+ bool lazy, bool interruptible, bool no_wait)
+{
+ struct ttm_bo_driver *driver = bo->bdev->driver;
+ void *sync_obj;
+ void *sync_obj_arg;
+ int ret = 0;
+
+ if (likely(bo->sync_obj == NULL))
+ return 0;
+
+ while (bo->sync_obj) {
+
+ if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) {
+ void *tmp_obj = bo->sync_obj;
+ bo->sync_obj = NULL;
+ clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
+ spin_unlock(&bo->lock);
+ driver->sync_obj_unref(&tmp_obj);
+ spin_lock(&bo->lock);
+ continue;
+ }
+
+ if (no_wait)
+ return -EBUSY;
+
+ sync_obj = driver->sync_obj_ref(bo->sync_obj);
+ sync_obj_arg = bo->sync_obj_arg;
+ spin_unlock(&bo->lock);
+ ret = driver->sync_obj_wait(sync_obj, sync_obj_arg,
+ lazy, interruptible);
+ if (unlikely(ret != 0)) {
+ driver->sync_obj_unref(&sync_obj);
+ spin_lock(&bo->lock);
+ return ret;
+ }
+ spin_lock(&bo->lock);
+ if (likely(bo->sync_obj == sync_obj &&
+ bo->sync_obj_arg == sync_obj_arg)) {
+ void *tmp_obj = bo->sync_obj;
+ bo->sync_obj = NULL;
+ clear_bit(TTM_BO_PRIV_FLAG_MOVING,
+ &bo->priv_flags);
+ spin_unlock(&bo->lock);
+ driver->sync_obj_unref(&sync_obj);
+ driver->sync_obj_unref(&tmp_obj);
+ spin_lock(&bo->lock);
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_wait);
+
+void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo)
+{
+ atomic_set(&bo->reserved, 0);
+ wake_up_all(&bo->event_queue);
+}
+
+int ttm_bo_block_reservation(struct ttm_buffer_object *bo, bool interruptible,
+ bool no_wait)
+{
+ int ret;
+
+ while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
+ if (no_wait)
+ return -EBUSY;
+ else if (interruptible) {
+ ret = wait_event_interruptible
+ (bo->event_queue, atomic_read(&bo->reserved) == 0);
+ if (unlikely(ret != 0))
+ return -ERESTART;
+ } else {
+ wait_event(bo->event_queue,
+ atomic_read(&bo->reserved) == 0);
+ }
+ }
+ return 0;
+}
+
+int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
+{
+ int ret = 0;
+
+ /*
+ * Using ttm_bo_reserve instead of ttm_bo_block_reservation
+ * makes sure the lru lists are updated.
+ */
+
+ ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
+ if (unlikely(ret != 0))
+ return ret;
+ spin_lock(&bo->lock);
+ ret = ttm_bo_wait(bo, false, true, no_wait);
+ spin_unlock(&bo->lock);
+ if (likely(ret == 0))
+ atomic_inc(&bo->cpu_writers);
+ ttm_bo_unreserve(bo);
+ return ret;
+}
+
+void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
+{
+ if (atomic_dec_and_test(&bo->cpu_writers))
+ wake_up_all(&bo->event_queue);
+}
+
+/**
+ * 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_device *bdev =
+ container_of(shrink, struct ttm_bo_device, 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(&bdev->lru_lock);
+ while (ret == -EBUSY) {
+ if (unlikely(list_empty(&bdev->swap_lru))) {
+ spin_unlock(&bdev->lru_lock);
+ return -EBUSY;
+ }
+
+ bo = list_first_entry(&bdev->swap_lru,
+ struct ttm_buffer_object, swap);
+ kref_get(&bo->list_kref);
+
+ /**
+ * Reserve buffer. Since we unlock while sleeping, we need
+ * to re-check that nobody removed us from the swap-list while
+ * we slept.
+ */
+
+ ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
+ if (unlikely(ret == -EBUSY)) {
+ spin_unlock(&bdev->lru_lock);
+ ttm_bo_wait_unreserved(bo, false);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ spin_lock(&bdev->lru_lock);
+ }
+ }
+
+ BUG_ON(ret != 0);
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&bdev->lru_lock);
+
+ while (put_count--)
+ kref_put(&bo->list_kref, ttm_bo_ref_bug);
+
+ /**
+ * Wait for GPU, then move to system cached.
+ */
+
+ spin_lock(&bo->lock);
+ ret = ttm_bo_wait(bo, false, false, false);
+ spin_unlock(&bo->lock);
+
+ 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.
+ */
+
+ ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage);
+out:
+
+ /**
+ *
+ * Unreserve without putting on LRU to avoid swapping out an
+ * already swapped buffer.
+ */
+
+ atomic_set(&bo->reserved, 0);
+ wake_up_all(&bo->event_queue);
+ 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->shrink) == 0)
+ ;
+}
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
new file mode 100644
index 00000000000..517c8455963
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -0,0 +1,561 @@
+/**************************************************************************
+ *
+ * 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 "ttm/ttm_bo_driver.h"
+#include "ttm/ttm_placement.h"
+#include <linux/io.h>
+#include <linux/highmem.h>
+#include <linux/wait.h>
+#include <linux/vmalloc.h>
+#include <linux/version.h>
+#include <linux/module.h>
+
+void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
+{
+ struct ttm_mem_reg *old_mem = &bo->mem;
+
+ if (old_mem->mm_node) {
+ spin_lock(&bo->bdev->lru_lock);
+ drm_mm_put_block(old_mem->mm_node);
+ spin_unlock(&bo->bdev->lru_lock);
+ }
+ old_mem->mm_node = NULL;
+}
+
+int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
+ bool evict, bool no_wait, struct ttm_mem_reg *new_mem)
+{
+ struct ttm_tt *ttm = bo->ttm;
+ struct ttm_mem_reg *old_mem = &bo->mem;
+ uint32_t save_flags = old_mem->placement;
+ 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;
+ save_flags = old_mem->placement;
+ }
+
+ 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;
+ ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE);
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_move_ttm);
+
+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];
+ unsigned long bus_offset;
+ unsigned long bus_size;
+ unsigned long bus_base;
+ int ret;
+ void *addr;
+
+ *virtual = NULL;
+ ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset, &bus_size);
+ if (ret || bus_size == 0)
+ return ret;
+
+ if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
+ addr = (void *)(((u8 *) man->io_addr) + bus_offset);
+ else {
+ if (mem->placement & TTM_PL_FLAG_WC)
+ addr = ioremap_wc(bus_base + bus_offset, bus_size);
+ else
+ addr = ioremap_nocache(bus_base + bus_offset, bus_size);
+ if (!addr)
+ return -ENOMEM;
+ }
+ *virtual = addr;
+ return 0;
+}
+
+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 && (man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
+ iounmap(virtual);
+}
+
+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)
+{
+ struct page *d = ttm_tt_get_page(ttm, page);
+ void *dst;
+
+ if (!d)
+ return -ENOMEM;
+
+ src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
+ dst = kmap(d);
+ if (!dst)
+ return -ENOMEM;
+
+ memcpy_fromio(dst, src, PAGE_SIZE);
+ kunmap(d);
+ return 0;
+}
+
+static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
+ unsigned long page)
+{
+ struct page *s = ttm_tt_get_page(ttm, page);
+ void *src;
+
+ if (!s)
+ return -ENOMEM;
+
+ dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
+ src = kmap(s);
+ if (!src)
+ return -ENOMEM;
+
+ memcpy_toio(dst, src, PAGE_SIZE);
+ kunmap(s);
+ return 0;
+}
+
+int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
+ bool evict, bool no_wait, 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;
+ uint32_t save_flags = old_mem->placement;
+ 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;
+
+ if (old_iomap == NULL && new_iomap == NULL)
+ goto out2;
+ if (old_iomap == NULL && ttm == NULL)
+ goto out2;
+
+ add = 0;
+ dir = 1;
+
+ if ((old_mem->mem_type == new_mem->mem_type) &&
+ (new_mem->mm_node->start <
+ old_mem->mm_node->start + old_mem->mm_node->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)
+ ret = ttm_copy_ttm_io_page(ttm, new_iomap, page);
+ else if (new_iomap == NULL)
+ ret = ttm_copy_io_ttm_page(ttm, old_iomap, page);
+ else
+ ret = ttm_copy_io_page(new_iomap, old_iomap, page);
+ if (ret)
+ goto out1;
+ }
+ mb();
+out2:
+ ttm_bo_free_old_node(bo);
+
+ *old_mem = *new_mem;
+ new_mem->mm_node = NULL;
+ ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE);
+
+ 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, new_mem, new_iomap);
+out:
+ ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
+ 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;
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_driver *driver = bdev->driver;
+
+ fbo = kzalloc(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.
+ */
+
+ spin_lock_init(&fbo->lock);
+ init_waitqueue_head(&fbo->event_queue);
+ INIT_LIST_HEAD(&fbo->ddestroy);
+ INIT_LIST_HEAD(&fbo->lru);
+ INIT_LIST_HEAD(&fbo->swap);
+ fbo->vm_node = NULL;
+
+ fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
+ if (fbo->mem.mm_node)
+ fbo->mem.mm_node->private = (void *)fbo;
+ kref_init(&fbo->list_kref);
+ kref_init(&fbo->kref);
+ fbo->destroy = &ttm_transfered_destroy;
+
+ *new_obj = fbo;
+ return 0;
+}
+
+pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t 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);
+
+#elif defined(__powerpc__)
+ if (!(caching_flags & TTM_PL_FLAG_CACHED)) {
+ pgprot_val(tmp) |= _PAGE_NO_CACHE;
+ if (caching_flags & TTM_PL_FLAG_UNCACHED)
+ pgprot_val(tmp) |= _PAGE_GUARDED;
+ }
+#endif
+#if defined(__ia64__)
+ if (caching_flags & TTM_PL_FLAG_WC)
+ tmp = pgprot_writecombine(tmp);
+ else
+ tmp = pgprot_noncached(tmp);
+#endif
+#if defined(__sparc__)
+ if (!(caching_flags & TTM_PL_FLAG_CACHED))
+ tmp = pgprot_noncached(tmp);
+#endif
+ return tmp;
+}
+
+static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
+ unsigned long bus_base,
+ unsigned long bus_offset,
+ unsigned long bus_size,
+ struct ttm_bo_kmap_obj *map)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_reg *mem = &bo->mem;
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+
+ if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP)) {
+ map->bo_kmap_type = ttm_bo_map_premapped;
+ map->virtual = (void *)(((u8 *) man->io_addr) + bus_offset);
+ } else {
+ map->bo_kmap_type = ttm_bo_map_iomap;
+ if (mem->placement & TTM_PL_FLAG_WC)
+ map->virtual = ioremap_wc(bus_base + bus_offset,
+ bus_size);
+ else
+ map->virtual = ioremap_nocache(bus_base + bus_offset,
+ bus_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;
+ struct page *d;
+ int i;
+
+ BUG_ON(!ttm);
+ 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_tt_get_page(ttm, start_page);
+ map->virtual = kmap(map->page);
+ } else {
+ /*
+ * Populate the part we're mapping;
+ */
+ for (i = start_page; i < start_page + num_pages; ++i) {
+ d = ttm_tt_get_page(ttm, i);
+ if (!d)
+ return -ENOMEM;
+ }
+
+ /*
+ * We need to use vmap to get the desired page protection
+ * or to make the buffer object look contigous.
+ */
+ prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
+ PAGE_KERNEL :
+ 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)
+{
+ int ret;
+ unsigned long bus_base;
+ unsigned long bus_offset;
+ unsigned long bus_size;
+
+ BUG_ON(!list_empty(&bo->swap));
+ map->virtual = NULL;
+ if (num_pages > bo->num_pages)
+ return -EINVAL;
+ if (start_page > bo->num_pages)
+ return -EINVAL;
+#if 0
+ if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC))
+ return -EPERM;
+#endif
+ ret = ttm_bo_pci_offset(bo->bdev, &bo->mem, &bus_base,
+ &bus_offset, &bus_size);
+ if (ret)
+ return ret;
+ if (bus_size == 0) {
+ return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
+ } else {
+ bus_offset += start_page << PAGE_SHIFT;
+ bus_size = num_pages << PAGE_SHIFT;
+ return ttm_bo_ioremap(bo, bus_base, bus_offset, bus_size, map);
+ }
+}
+EXPORT_SYMBOL(ttm_bo_kmap);
+
+void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
+{
+ 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();
+ }
+ map->virtual = NULL;
+ map->page = NULL;
+}
+EXPORT_SYMBOL(ttm_bo_kunmap);
+
+int ttm_bo_pfn_prot(struct ttm_buffer_object *bo,
+ unsigned long dst_offset,
+ unsigned long *pfn, pgprot_t *prot)
+{
+ struct ttm_mem_reg *mem = &bo->mem;
+ struct ttm_bo_device *bdev = bo->bdev;
+ unsigned long bus_offset;
+ unsigned long bus_size;
+ unsigned long bus_base;
+ int ret;
+ ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset,
+ &bus_size);
+ if (ret)
+ return -EINVAL;
+ if (bus_size != 0)
+ *pfn = (bus_base + bus_offset + dst_offset) >> PAGE_SHIFT;
+ else
+ if (!bo->ttm)
+ return -EINVAL;
+ else
+ *pfn = page_to_pfn(ttm_tt_get_page(bo->ttm,
+ dst_offset >>
+ PAGE_SHIFT));
+ *prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
+ PAGE_KERNEL : ttm_io_prot(mem->placement, PAGE_KERNEL);
+
+ return 0;
+}
+
+int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
+ void *sync_obj,
+ void *sync_obj_arg,
+ bool evict, bool no_wait,
+ struct ttm_mem_reg *new_mem)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_driver *driver = bdev->driver;
+ struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
+ struct ttm_mem_reg *old_mem = &bo->mem;
+ int ret;
+ uint32_t save_flags = old_mem->placement;
+ struct ttm_buffer_object *ghost_obj;
+ void *tmp_obj = NULL;
+
+ spin_lock(&bo->lock);
+ if (bo->sync_obj) {
+ tmp_obj = bo->sync_obj;
+ bo->sync_obj = NULL;
+ }
+ bo->sync_obj = driver->sync_obj_ref(sync_obj);
+ bo->sync_obj_arg = sync_obj_arg;
+ if (evict) {
+ ret = ttm_bo_wait(bo, false, false, false);
+ spin_unlock(&bo->lock);
+ driver->sync_obj_unref(&bo->sync_obj);
+
+ if (ret)
+ return ret;
+
+ ttm_bo_free_old_node(bo);
+ if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
+ (bo->ttm != NULL)) {
+ ttm_tt_unbind(bo->ttm);
+ ttm_tt_destroy(bo->ttm);
+ bo->ttm = NULL;
+ }
+ } 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);
+ spin_unlock(&bo->lock);
+
+ ret = ttm_buffer_object_transfer(bo, &ghost_obj);
+ if (ret)
+ return ret;
+
+ /**
+ * 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;
+ ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE);
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
new file mode 100644
index 00000000000..27b146c54fb
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -0,0 +1,454 @@
+/**************************************************************************
+ *
+ * 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>
+ */
+
+#include <ttm/ttm_module.h>
+#include <ttm/ttm_bo_driver.h>
+#include <ttm/ttm_placement.h>
+#include <linux/mm.h>
+#include <linux/version.h>
+#include <linux/rbtree.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+
+#define TTM_BO_VM_NUM_PREFAULT 16
+
+static struct ttm_buffer_object *ttm_bo_vm_lookup_rb(struct ttm_bo_device *bdev,
+ unsigned long page_start,
+ unsigned long num_pages)
+{
+ struct rb_node *cur = bdev->addr_space_rb.rb_node;
+ unsigned long cur_offset;
+ struct ttm_buffer_object *bo;
+ struct ttm_buffer_object *best_bo = NULL;
+
+ while (likely(cur != NULL)) {
+ bo = rb_entry(cur, struct ttm_buffer_object, vm_rb);
+ cur_offset = bo->vm_node->start;
+ if (page_start >= cur_offset) {
+ cur = cur->rb_right;
+ best_bo = bo;
+ if (page_start == cur_offset)
+ break;
+ } else
+ cur = cur->rb_left;
+ }
+
+ if (unlikely(best_bo == NULL))
+ return NULL;
+
+ if (unlikely((best_bo->vm_node->start + best_bo->num_pages) <
+ (page_start + num_pages)))
+ return NULL;
+
+ return best_bo;
+}
+
+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 bus_base;
+ unsigned long bus_offset;
+ unsigned long bus_size;
+ unsigned long page_offset;
+ unsigned long page_last;
+ unsigned long pfn;
+ struct ttm_tt *ttm = NULL;
+ struct page *page;
+ int ret;
+ int i;
+ bool is_iomem;
+ unsigned long address = (unsigned long)vmf->virtual_address;
+ int retval = VM_FAULT_NOPAGE;
+
+ /*
+ * 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 scheduling.
+ */
+
+ ret = ttm_bo_reserve(bo, true, true, false, 0);
+ if (unlikely(ret != 0)) {
+ if (ret == -EBUSY)
+ set_need_resched();
+ return VM_FAULT_NOPAGE;
+ }
+
+ /*
+ * Wait for buffer data in transit, due to a pipelined
+ * move.
+ */
+
+ spin_lock(&bo->lock);
+ if (test_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags)) {
+ ret = ttm_bo_wait(bo, false, true, false);
+ spin_unlock(&bo->lock);
+ if (unlikely(ret != 0)) {
+ retval = (ret != -ERESTART) ?
+ VM_FAULT_SIGBUS : VM_FAULT_NOPAGE;
+ goto out_unlock;
+ }
+ } else
+ spin_unlock(&bo->lock);
+
+
+ ret = ttm_bo_pci_offset(bdev, &bo->mem, &bus_base, &bus_offset,
+ &bus_size);
+ if (unlikely(ret != 0)) {
+ retval = VM_FAULT_SIGBUS;
+ goto out_unlock;
+ }
+
+ is_iomem = (bus_size != 0);
+
+ page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
+ bo->vm_node->start - vma->vm_pgoff;
+ page_last = ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) +
+ bo->vm_node->start - vma->vm_pgoff;
+
+ if (unlikely(page_offset >= bo->num_pages)) {
+ retval = VM_FAULT_SIGBUS;
+ goto out_unlock;
+ }
+
+ /*
+ * Strictly, we're not allowed to modify vma->vm_page_prot here,
+ * since the mmap_sem is only held in read mode. However, we
+ * modify only the caching bits of vma->vm_page_prot and
+ * consider those bits protected by
+ * the bo->mutex, as we should be the only writers.
+ * There shouldn't really be any readers of these bits except
+ * within vm_insert_mixed()? fork?
+ *
+ * TODO: Add a list of vmas to the bo, and change the
+ * vma->vm_page_prot when the object changes caching policy, with
+ * the correct locks held.
+ */
+
+ if (is_iomem) {
+ vma->vm_page_prot = ttm_io_prot(bo->mem.placement,
+ vma->vm_page_prot);
+ } else {
+ ttm = bo->ttm;
+ vma->vm_page_prot = (bo->mem.placement & TTM_PL_FLAG_CACHED) ?
+ vm_get_page_prot(vma->vm_flags) :
+ ttm_io_prot(bo->mem.placement, vma->vm_page_prot);
+ }
+
+ /*
+ * Speculatively prefault a number of pages. Only error on
+ * first page.
+ */
+
+ for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
+
+ if (is_iomem)
+ pfn = ((bus_base + bus_offset) >> PAGE_SHIFT) +
+ page_offset;
+ else {
+ page = ttm_tt_get_page(ttm, page_offset);
+ if (unlikely(!page && i == 0)) {
+ retval = VM_FAULT_OOM;
+ goto out_unlock;
+ } else if (unlikely(!page)) {
+ break;
+ }
+ pfn = page_to_pfn(page);
+ }
+
+ ret = vm_insert_mixed(vma, 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_unlock;
+
+ }
+
+ address += PAGE_SIZE;
+ if (unlikely(++page_offset >= page_last))
+ break;
+ }
+
+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;
+
+ (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 struct vm_operations_struct ttm_bo_vm_ops = {
+ .fault = ttm_bo_vm_fault,
+ .open = ttm_bo_vm_open,
+ .close = ttm_bo_vm_close
+};
+
+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;
+
+ read_lock(&bdev->vm_lock);
+ bo = ttm_bo_vm_lookup_rb(bdev, vma->vm_pgoff,
+ (vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
+ if (likely(bo != NULL))
+ ttm_bo_reference(bo);
+ read_unlock(&bdev->vm_lock);
+
+ if (unlikely(bo == NULL)) {
+ printk(KERN_ERR TTM_PFX
+ "Could not find buffer object to map.\n");
+ 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;
+ vma->vm_flags |= VM_RESERVED | VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
+ 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_RESERVED | VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
+ return 0;
+}
+EXPORT_SYMBOL(ttm_fbdev_mmap);
+
+
+ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp,
+ const char __user *wbuf, char __user *rbuf, size_t count,
+ loff_t *f_pos, bool write)
+{
+ struct ttm_buffer_object *bo;
+ struct ttm_bo_driver *driver;
+ struct ttm_bo_kmap_obj map;
+ unsigned long dev_offset = (*f_pos >> PAGE_SHIFT);
+ unsigned long kmap_offset;
+ unsigned long kmap_end;
+ unsigned long kmap_num;
+ size_t io_size;
+ unsigned int page_offset;
+ char *virtual;
+ int ret;
+ bool no_wait = false;
+ bool dummy;
+
+ read_lock(&bdev->vm_lock);
+ bo = ttm_bo_vm_lookup_rb(bdev, dev_offset, 1);
+ if (likely(bo != NULL))
+ ttm_bo_reference(bo);
+ read_unlock(&bdev->vm_lock);
+
+ if (unlikely(bo == NULL))
+ return -EFAULT;
+
+ 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;
+
+ kmap_offset = dev_offset - bo->vm_node->start;
+ if (unlikely(kmap_offset) >= bo->num_pages) {
+ ret = -EFBIG;
+ goto out_unref;
+ }
+
+ page_offset = *f_pos & ~PAGE_MASK;
+ io_size = bo->num_pages - kmap_offset;
+ io_size = (io_size << PAGE_SHIFT) - page_offset;
+ if (count < io_size)
+ io_size = count;
+
+ kmap_end = (*f_pos + count - 1) >> PAGE_SHIFT;
+ kmap_num = kmap_end - kmap_offset + 1;
+
+ ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
+
+ switch (ret) {
+ case 0:
+ break;
+ case -ERESTART:
+ ret = -EINTR;
+ goto out_unref;
+ case -EBUSY:
+ ret = -EAGAIN;
+ goto out_unref;
+ default:
+ goto out_unref;
+ }
+
+ ret = ttm_bo_kmap(bo, kmap_offset, kmap_num, &map);
+ if (unlikely(ret != 0)) {
+ ttm_bo_unreserve(bo);
+ goto out_unref;
+ }
+
+ virtual = ttm_kmap_obj_virtual(&map, &dummy);
+ virtual += page_offset;
+
+ if (write)
+ ret = copy_from_user(virtual, wbuf, io_size);
+ else
+ ret = copy_to_user(rbuf, virtual, io_size);
+
+ ttm_bo_kunmap(&map);
+ ttm_bo_unreserve(bo);
+ ttm_bo_unref(&bo);
+
+ if (unlikely(ret != 0))
+ return -EFBIG;
+
+ *f_pos += io_size;
+
+ return io_size;
+out_unref:
+ ttm_bo_unref(&bo);
+ return ret;
+}
+
+ssize_t ttm_bo_fbdev_io(struct ttm_buffer_object *bo, const char __user *wbuf,
+ char __user *rbuf, size_t count, loff_t *f_pos,
+ bool write)
+{
+ struct ttm_bo_kmap_obj map;
+ unsigned long kmap_offset;
+ unsigned long kmap_end;
+ unsigned long kmap_num;
+ size_t io_size;
+ unsigned int page_offset;
+ char *virtual;
+ int ret;
+ bool no_wait = false;
+ bool dummy;
+
+ kmap_offset = (*f_pos >> PAGE_SHIFT);
+ if (unlikely(kmap_offset) >= bo->num_pages)
+ return -EFBIG;
+
+ page_offset = *f_pos & ~PAGE_MASK;
+ io_size = bo->num_pages - kmap_offset;
+ io_size = (io_size << PAGE_SHIFT) - page_offset;
+ if (count < io_size)
+ io_size = count;
+
+ kmap_end = (*f_pos + count - 1) >> PAGE_SHIFT;
+ kmap_num = kmap_end - kmap_offset + 1;
+
+ ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
+
+ switch (ret) {
+ case 0:
+ break;
+ case -ERESTART:
+ return -EINTR;
+ case -EBUSY:
+ return -EAGAIN;
+ default:
+ return ret;
+ }
+
+ ret = ttm_bo_kmap(bo, kmap_offset, kmap_num, &map);
+ if (unlikely(ret != 0)) {
+ ttm_bo_unreserve(bo);
+ return ret;
+ }
+
+ virtual = ttm_kmap_obj_virtual(&map, &dummy);
+ virtual += page_offset;
+
+ if (write)
+ ret = copy_from_user(virtual, wbuf, io_size);
+ else
+ ret = copy_to_user(rbuf, virtual, io_size);
+
+ ttm_bo_kunmap(&map);
+ ttm_bo_unreserve(bo);
+ ttm_bo_unref(&bo);
+
+ if (unlikely(ret != 0))
+ return ret;
+
+ *f_pos += io_size;
+
+ return io_size;
+}
diff --git a/drivers/gpu/drm/ttm/ttm_global.c b/drivers/gpu/drm/ttm/ttm_global.c
new file mode 100644
index 00000000000..0b14eb1972b
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_global.c
@@ -0,0 +1,114 @@
+/**************************************************************************
+ *
+ * Copyright 2008-2009 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 "ttm/ttm_module.h"
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+struct ttm_global_item {
+ struct mutex mutex;
+ void *object;
+ int refcount;
+};
+
+static struct ttm_global_item glob[TTM_GLOBAL_NUM];
+
+void ttm_global_init(void)
+{
+ int i;
+
+ for (i = 0; i < TTM_GLOBAL_NUM; ++i) {
+ struct ttm_global_item *item = &glob[i];
+ mutex_init(&item->mutex);
+ item->object = NULL;
+ item->refcount = 0;
+ }
+}
+
+void ttm_global_release(void)
+{
+ int i;
+ for (i = 0; i < TTM_GLOBAL_NUM; ++i) {
+ struct ttm_global_item *item = &glob[i];
+ BUG_ON(item->object != NULL);
+ BUG_ON(item->refcount != 0);
+ }
+}
+
+int ttm_global_item_ref(struct ttm_global_reference *ref)
+{
+ int ret;
+ struct ttm_global_item *item = &glob[ref->global_type];
+ void *object;
+
+ mutex_lock(&item->mutex);
+ if (item->refcount == 0) {
+ item->object = kmalloc(ref->size, GFP_KERNEL);
+ if (unlikely(item->object == NULL)) {
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
+ ref->object = item->object;
+ ret = ref->init(ref);
+ if (unlikely(ret != 0))
+ goto out_err;
+
+ ++item->refcount;
+ }
+ ref->object = item->object;
+ object = item->object;
+ mutex_unlock(&item->mutex);
+ return 0;
+out_err:
+ kfree(item->object);
+ mutex_unlock(&item->mutex);
+ item->object = NULL;
+ return ret;
+}
+EXPORT_SYMBOL(ttm_global_item_ref);
+
+void ttm_global_item_unref(struct ttm_global_reference *ref)
+{
+ struct ttm_global_item *item = &glob[ref->global_type];
+
+ mutex_lock(&item->mutex);
+ BUG_ON(item->refcount == 0);
+ BUG_ON(ref->object != item->object);
+ if (--item->refcount == 0) {
+ ref->release(ref);
+ kfree(item->object);
+ item->object = NULL;
+ }
+ mutex_unlock(&item->mutex);
+}
+EXPORT_SYMBOL(ttm_global_item_unref);
+
diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
new file mode 100644
index 00000000000..87323d4ff68
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_memory.c
@@ -0,0 +1,234 @@
+/**************************************************************************
+ *
+ * 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 "ttm/ttm_memory.h"
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+
+#define TTM_PFX "[TTM] "
+#define TTM_MEMORY_ALLOC_RETRIES 4
+
+/**
+ * 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_workqueue,
+ uint64_t extra)
+{
+ int ret;
+ struct ttm_mem_shrink *shrink;
+ uint64_t target;
+ uint64_t total_target;
+
+ spin_lock(&glob->lock);
+ if (glob->shrink == NULL)
+ goto out;
+
+ if (from_workqueue) {
+ target = glob->swap_limit;
+ total_target = glob->total_memory_swap_limit;
+ } else if (capable(CAP_SYS_ADMIN)) {
+ total_target = glob->emer_total_memory;
+ target = glob->emer_memory;
+ } else {
+ total_target = glob->max_total_memory;
+ target = glob->max_memory;
+ }
+
+ total_target = (extra >= total_target) ? 0 : total_target - extra;
+ target = (extra >= target) ? 0 : target - extra;
+
+ while (glob->used_memory > target ||
+ glob->used_total_memory > total_target) {
+ 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);
+}
+
+int ttm_mem_global_init(struct ttm_mem_global *glob)
+{
+ struct sysinfo si;
+ uint64_t mem;
+
+ spin_lock_init(&glob->lock);
+ glob->swap_queue = create_singlethread_workqueue("ttm_swap");
+ INIT_WORK(&glob->work, ttm_shrink_work);
+ init_waitqueue_head(&glob->queue);
+
+ si_meminfo(&si);
+
+ mem = si.totalram - si.totalhigh;
+ mem *= si.mem_unit;
+
+ glob->max_memory = mem >> 1;
+ glob->emer_memory = (mem >> 1) + (mem >> 2);
+ glob->swap_limit = glob->max_memory - (mem >> 3);
+ glob->used_memory = 0;
+ glob->used_total_memory = 0;
+ glob->shrink = NULL;
+
+ mem = si.totalram;
+ mem *= si.mem_unit;
+
+ glob->max_total_memory = mem >> 1;
+ glob->emer_total_memory = (mem >> 1) + (mem >> 2);
+
+ glob->total_memory_swap_limit = glob->max_total_memory - (mem >> 3);
+
+ printk(KERN_INFO TTM_PFX "TTM available graphics memory: %llu MiB\n",
+ glob->max_total_memory >> 20);
+ printk(KERN_INFO TTM_PFX "TTM available object memory: %llu MiB\n",
+ glob->max_memory >> 20);
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_mem_global_init);
+
+void ttm_mem_global_release(struct ttm_mem_global *glob)
+{
+ printk(KERN_INFO TTM_PFX "Used total memory is %llu bytes.\n",
+ (unsigned long long)glob->used_total_memory);
+ flush_workqueue(glob->swap_queue);
+ destroy_workqueue(glob->swap_queue);
+ glob->swap_queue = NULL;
+}
+EXPORT_SYMBOL(ttm_mem_global_release);
+
+static inline void ttm_check_swapping(struct ttm_mem_global *glob)
+{
+ bool needs_swapping;
+
+ spin_lock(&glob->lock);
+ needs_swapping = (glob->used_memory > glob->swap_limit ||
+ glob->used_total_memory >
+ glob->total_memory_swap_limit);
+ spin_unlock(&glob->lock);
+
+ if (unlikely(needs_swapping))
+ (void)queue_work(glob->swap_queue, &glob->work);
+
+}
+
+void ttm_mem_global_free(struct ttm_mem_global *glob,
+ uint64_t amount, bool himem)
+{
+ spin_lock(&glob->lock);
+ glob->used_total_memory -= amount;
+ if (!himem)
+ glob->used_memory -= amount;
+ wake_up_all(&glob->queue);
+ spin_unlock(&glob->lock);
+}
+
+static int ttm_mem_global_reserve(struct ttm_mem_global *glob,
+ uint64_t amount, bool himem, bool reserve)
+{
+ uint64_t limit;
+ uint64_t lomem_limit;
+ int ret = -ENOMEM;
+
+ spin_lock(&glob->lock);
+
+ if (capable(CAP_SYS_ADMIN)) {
+ limit = glob->emer_total_memory;
+ lomem_limit = glob->emer_memory;
+ } else {
+ limit = glob->max_total_memory;
+ lomem_limit = glob->max_memory;
+ }
+
+ if (unlikely(glob->used_total_memory + amount > limit))
+ goto out_unlock;
+ if (unlikely(!himem && glob->used_memory + amount > lomem_limit))
+ goto out_unlock;
+
+ if (reserve) {
+ glob->used_total_memory += amount;
+ if (!himem)
+ glob->used_memory += amount;
+ }
+ ret = 0;
+out_unlock:
+ spin_unlock(&glob->lock);
+ ttm_check_swapping(glob);
+
+ return ret;
+}
+
+int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
+ bool no_wait, bool interruptible, bool himem)
+{
+ int count = TTM_MEMORY_ALLOC_RETRIES;
+
+ while (unlikely(ttm_mem_global_reserve(glob, memory, himem, true)
+ != 0)) {
+ if (no_wait)
+ return -ENOMEM;
+ if (unlikely(count-- == 0))
+ return -ENOMEM;
+ ttm_shrink(glob, false, memory + (memory >> 2) + 16);
+ }
+
+ return 0;
+}
+
+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;
+}
diff --git a/drivers/gpu/drm/ttm/ttm_module.c b/drivers/gpu/drm/ttm/ttm_module.c
new file mode 100644
index 00000000000..59ce8191d58
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_module.c
@@ -0,0 +1,50 @@
+/**************************************************************************
+ *
+ * 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 <ttm/ttm_module.h>
+
+static int __init ttm_init(void)
+{
+ ttm_global_init();
+ return 0;
+}
+
+static void __exit ttm_exit(void)
+{
+ ttm_global_release();
+}
+
+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/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
new file mode 100644
index 00000000000..c27ab3a877a
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -0,0 +1,635 @@
+/**************************************************************************
+ *
+ * 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>
+ */
+
+#include <linux/version.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+#include <linux/file.h>
+#include <linux/swap.h>
+#include "ttm/ttm_module.h"
+#include "ttm/ttm_bo_driver.h"
+#include "ttm/ttm_placement.h"
+
+static int ttm_tt_swapin(struct ttm_tt *ttm);
+
+#if defined(CONFIG_X86)
+static void ttm_tt_clflush_page(struct page *page)
+{
+ uint8_t *page_virtual;
+ unsigned int i;
+
+ if (unlikely(page == NULL))
+ return;
+
+ page_virtual = kmap_atomic(page, KM_USER0);
+
+ for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
+ clflush(page_virtual + i);
+
+ kunmap_atomic(page_virtual, KM_USER0);
+}
+
+static void ttm_tt_cache_flush_clflush(struct page *pages[],
+ unsigned long num_pages)
+{
+ unsigned long i;
+
+ mb();
+ for (i = 0; i < num_pages; ++i)
+ ttm_tt_clflush_page(*pages++);
+ mb();
+}
+#else
+static void ttm_tt_ipi_handler(void *null)
+{
+ ;
+}
+#endif
+
+void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages)
+{
+
+#if defined(CONFIG_X86)
+ if (cpu_has_clflush) {
+ ttm_tt_cache_flush_clflush(pages, num_pages);
+ return;
+ }
+#else
+ if (on_each_cpu(ttm_tt_ipi_handler, NULL, 1) != 0)
+ printk(KERN_ERR TTM_PFX
+ "Timed out waiting for drm cache flush.\n");
+#endif
+}
+
+/**
+ * Allocates storage for pointers to the pages that back the ttm.
+ *
+ * Uses kmalloc if possible. Otherwise falls back to vmalloc.
+ */
+static void ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
+{
+ unsigned long size = ttm->num_pages * sizeof(*ttm->pages);
+ ttm->pages = NULL;
+
+ if (size <= PAGE_SIZE)
+ ttm->pages = kzalloc(size, GFP_KERNEL);
+
+ if (!ttm->pages) {
+ ttm->pages = vmalloc_user(size);
+ if (ttm->pages)
+ ttm->page_flags |= TTM_PAGE_FLAG_VMALLOC;
+ }
+}
+
+static void ttm_tt_free_page_directory(struct ttm_tt *ttm)
+{
+ if (ttm->page_flags & TTM_PAGE_FLAG_VMALLOC) {
+ vfree(ttm->pages);
+ ttm->page_flags &= ~TTM_PAGE_FLAG_VMALLOC;
+ } else {
+ kfree(ttm->pages);
+ }
+ ttm->pages = NULL;
+}
+
+static struct page *ttm_tt_alloc_page(unsigned page_flags)
+{
+ if (page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
+ return alloc_page(GFP_HIGHUSER | __GFP_ZERO);
+
+ return alloc_page(GFP_HIGHUSER);
+}
+
+static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
+{
+ int write;
+ int dirty;
+ struct page *page;
+ int i;
+ struct ttm_backend *be = ttm->be;
+
+ BUG_ON(!(ttm->page_flags & TTM_PAGE_FLAG_USER));
+ write = ((ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0);
+ dirty = ((ttm->page_flags & TTM_PAGE_FLAG_USER_DIRTY) != 0);
+
+ if (be)
+ be->func->clear(be);
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ page = ttm->pages[i];
+ if (page == NULL)
+ continue;
+
+ if (page == ttm->dummy_read_page) {
+ BUG_ON(write);
+ continue;
+ }
+
+ if (write && dirty && !PageReserved(page))
+ set_page_dirty_lock(page);
+
+ ttm->pages[i] = NULL;
+ ttm_mem_global_free(ttm->bdev->mem_glob, PAGE_SIZE, false);
+ put_page(page);
+ }
+ ttm->state = tt_unpopulated;
+ ttm->first_himem_page = ttm->num_pages;
+ ttm->last_lomem_page = -1;
+}
+
+static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
+{
+ struct page *p;
+ struct ttm_bo_device *bdev = ttm->bdev;
+ struct ttm_mem_global *mem_glob = bdev->mem_glob;
+ int ret;
+
+ while (NULL == (p = ttm->pages[index])) {
+ p = ttm_tt_alloc_page(ttm->page_flags);
+
+ if (!p)
+ return NULL;
+
+ if (PageHighMem(p)) {
+ ret =
+ ttm_mem_global_alloc(mem_glob, PAGE_SIZE,
+ false, false, true);
+ if (unlikely(ret != 0))
+ goto out_err;
+ ttm->pages[--ttm->first_himem_page] = p;
+ } else {
+ ret =
+ ttm_mem_global_alloc(mem_glob, PAGE_SIZE,
+ false, false, false);
+ if (unlikely(ret != 0))
+ goto out_err;
+ ttm->pages[++ttm->last_lomem_page] = p;
+ }
+ }
+ return p;
+out_err:
+ put_page(p);
+ return NULL;
+}
+
+struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index)
+{
+ int ret;
+
+ if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+ ret = ttm_tt_swapin(ttm);
+ if (unlikely(ret != 0))
+ return NULL;
+ }
+ return __ttm_tt_get_page(ttm, index);
+}
+
+int ttm_tt_populate(struct ttm_tt *ttm)
+{
+ struct page *page;
+ unsigned long i;
+ struct ttm_backend *be;
+ int ret;
+
+ if (ttm->state != tt_unpopulated)
+ return 0;
+
+ if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+ ret = ttm_tt_swapin(ttm);
+ if (unlikely(ret != 0))
+ return ret;
+ }
+
+ be = ttm->be;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ page = __ttm_tt_get_page(ttm, i);
+ if (!page)
+ return -ENOMEM;
+ }
+
+ be->func->populate(be, ttm->num_pages, ttm->pages,
+ ttm->dummy_read_page);
+ ttm->state = tt_unbound;
+ return 0;
+}
+
+#ifdef CONFIG_X86
+static inline int ttm_tt_set_page_caching(struct page *p,
+ enum ttm_caching_state c_state)
+{
+ if (PageHighMem(p))
+ return 0;
+
+ switch (c_state) {
+ case tt_cached:
+ return set_pages_wb(p, 1);
+ case tt_wc:
+ return set_memory_wc((unsigned long) page_address(p), 1);
+ default:
+ return set_pages_uc(p, 1);
+ }
+}
+#else /* CONFIG_X86 */
+static inline int ttm_tt_set_page_caching(struct page *p,
+ enum ttm_caching_state c_state)
+{
+ 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 (c_state != tt_cached) {
+ ret = ttm_tt_populate(ttm);
+ if (unlikely(ret != 0))
+ return ret;
+ }
+
+ if (ttm->caching_state == tt_cached)
+ ttm_tt_cache_flush(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, 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,
+ 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);
+}
+
+static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
+{
+ int i;
+ struct page *cur_page;
+ struct ttm_backend *be = ttm->be;
+
+ if (be)
+ be->func->clear(be);
+ (void)ttm_tt_set_caching(ttm, tt_cached);
+ for (i = 0; i < ttm->num_pages; ++i) {
+ cur_page = ttm->pages[i];
+ ttm->pages[i] = NULL;
+ if (cur_page) {
+ if (page_count(cur_page) != 1)
+ printk(KERN_ERR TTM_PFX
+ "Erroneous page count. "
+ "Leaking pages.\n");
+ ttm_mem_global_free(ttm->bdev->mem_glob, PAGE_SIZE,
+ PageHighMem(cur_page));
+ __free_page(cur_page);
+ }
+ }
+ ttm->state = tt_unpopulated;
+ ttm->first_himem_page = ttm->num_pages;
+ ttm->last_lomem_page = -1;
+}
+
+void ttm_tt_destroy(struct ttm_tt *ttm)
+{
+ struct ttm_backend *be;
+
+ if (unlikely(ttm == NULL))
+ return;
+
+ be = ttm->be;
+ if (likely(be != NULL)) {
+ be->func->destroy(be);
+ ttm->be = NULL;
+ }
+
+ if (likely(ttm->pages != NULL)) {
+ if (ttm->page_flags & TTM_PAGE_FLAG_USER)
+ ttm_tt_free_user_pages(ttm);
+ else
+ ttm_tt_free_alloced_pages(ttm);
+
+ ttm_tt_free_page_directory(ttm);
+ }
+
+ if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTANT_SWAP) &&
+ ttm->swap_storage)
+ fput(ttm->swap_storage);
+
+ kfree(ttm);
+}
+
+int ttm_tt_set_user(struct ttm_tt *ttm,
+ struct task_struct *tsk,
+ unsigned long start, unsigned long num_pages)
+{
+ struct mm_struct *mm = tsk->mm;
+ int ret;
+ int write = (ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0;
+ struct ttm_mem_global *mem_glob = ttm->bdev->mem_glob;
+
+ BUG_ON(num_pages != ttm->num_pages);
+ BUG_ON((ttm->page_flags & TTM_PAGE_FLAG_USER) == 0);
+
+ /**
+ * Account user pages as lowmem pages for now.
+ */
+
+ ret = ttm_mem_global_alloc(mem_glob, num_pages * PAGE_SIZE,
+ false, false, false);
+ if (unlikely(ret != 0))
+ return ret;
+
+ down_read(&mm->mmap_sem);
+ ret = get_user_pages(tsk, mm, start, num_pages,
+ write, 0, ttm->pages, NULL);
+ up_read(&mm->mmap_sem);
+
+ if (ret != num_pages && write) {
+ ttm_tt_free_user_pages(ttm);
+ ttm_mem_global_free(mem_glob, num_pages * PAGE_SIZE, false);
+ return -ENOMEM;
+ }
+
+ ttm->tsk = tsk;
+ ttm->start = start;
+ ttm->state = tt_unbound;
+
+ return 0;
+}
+
+struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
+ uint32_t page_flags, struct page *dummy_read_page)
+{
+ struct ttm_bo_driver *bo_driver = bdev->driver;
+ struct ttm_tt *ttm;
+
+ if (!bo_driver)
+ return NULL;
+
+ ttm = kzalloc(sizeof(*ttm), GFP_KERNEL);
+ if (!ttm)
+ return NULL;
+
+ ttm->bdev = bdev;
+
+ ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ ttm->first_himem_page = ttm->num_pages;
+ ttm->last_lomem_page = -1;
+ ttm->caching_state = tt_cached;
+ ttm->page_flags = page_flags;
+
+ ttm->dummy_read_page = dummy_read_page;
+
+ ttm_tt_alloc_page_directory(ttm);
+ if (!ttm->pages) {
+ ttm_tt_destroy(ttm);
+ printk(KERN_ERR TTM_PFX "Failed allocating page table\n");
+ return NULL;
+ }
+ ttm->be = bo_driver->create_ttm_backend_entry(bdev);
+ if (!ttm->be) {
+ ttm_tt_destroy(ttm);
+ printk(KERN_ERR TTM_PFX "Failed creating ttm backend entry\n");
+ return NULL;
+ }
+ ttm->state = tt_unpopulated;
+ return ttm;
+}
+
+void ttm_tt_unbind(struct ttm_tt *ttm)
+{
+ int ret;
+ struct ttm_backend *be = ttm->be;
+
+ if (ttm->state == tt_bound) {
+ ret = be->func->unbind(be);
+ BUG_ON(ret);
+ ttm->state = tt_unbound;
+ }
+}
+
+int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
+{
+ int ret = 0;
+ struct ttm_backend *be;
+
+ if (!ttm)
+ return -EINVAL;
+
+ if (ttm->state == tt_bound)
+ return 0;
+
+ be = ttm->be;
+
+ ret = ttm_tt_populate(ttm);
+ if (ret)
+ return ret;
+
+ ret = be->func->bind(be, bo_mem);
+ if (ret) {
+ printk(KERN_ERR TTM_PFX "Couldn't bind backend.\n");
+ return ret;
+ }
+
+ ttm->state = tt_bound;
+
+ if (ttm->page_flags & TTM_PAGE_FLAG_USER)
+ ttm->page_flags |= TTM_PAGE_FLAG_USER_DIRTY;
+ return 0;
+}
+EXPORT_SYMBOL(ttm_tt_bind);
+
+static 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;
+ void *from_virtual;
+ void *to_virtual;
+ int i;
+ int ret;
+
+ if (ttm->page_flags & TTM_PAGE_FLAG_USER) {
+ ret = ttm_tt_set_user(ttm, ttm->tsk, ttm->start,
+ ttm->num_pages);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
+ return 0;
+ }
+
+ swap_storage = ttm->swap_storage;
+ BUG_ON(swap_storage == NULL);
+
+ swap_space = swap_storage->f_path.dentry->d_inode->i_mapping;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ from_page = read_mapping_page(swap_space, i, NULL);
+ if (IS_ERR(from_page))
+ goto out_err;
+ to_page = __ttm_tt_get_page(ttm, i);
+ if (unlikely(to_page == NULL))
+ goto out_err;
+
+ preempt_disable();
+ from_virtual = kmap_atomic(from_page, KM_USER0);
+ to_virtual = kmap_atomic(to_page, KM_USER1);
+ memcpy(to_virtual, from_virtual, PAGE_SIZE);
+ kunmap_atomic(to_virtual, KM_USER1);
+ kunmap_atomic(from_virtual, KM_USER0);
+ preempt_enable();
+ page_cache_release(from_page);
+ }
+
+ if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTANT_SWAP))
+ fput(swap_storage);
+ ttm->swap_storage = NULL;
+ ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
+
+ return 0;
+out_err:
+ ttm_tt_free_alloced_pages(ttm);
+ return -ENOMEM;
+}
+
+int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
+{
+ struct address_space *swap_space;
+ struct file *swap_storage;
+ struct page *from_page;
+ struct page *to_page;
+ void *from_virtual;
+ void *to_virtual;
+ int i;
+
+ BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
+ BUG_ON(ttm->caching_state != tt_cached);
+
+ /*
+ * For user buffers, just unpin the pages, as there should be
+ * vma references.
+ */
+
+ if (ttm->page_flags & TTM_PAGE_FLAG_USER) {
+ ttm_tt_free_user_pages(ttm);
+ ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
+ ttm->swap_storage = NULL;
+ return 0;
+ }
+
+ if (!persistant_swap_storage) {
+ swap_storage = shmem_file_setup("ttm swap",
+ ttm->num_pages << PAGE_SHIFT,
+ 0);
+ if (unlikely(IS_ERR(swap_storage))) {
+ printk(KERN_ERR "Failed allocating swap storage.\n");
+ return -ENOMEM;
+ }
+ } else
+ swap_storage = persistant_swap_storage;
+
+ swap_space = swap_storage->f_path.dentry->d_inode->i_mapping;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ from_page = ttm->pages[i];
+ if (unlikely(from_page == NULL))
+ continue;
+ to_page = read_mapping_page(swap_space, i, NULL);
+ if (unlikely(to_page == NULL))
+ goto out_err;
+
+ preempt_disable();
+ from_virtual = kmap_atomic(from_page, KM_USER0);
+ to_virtual = kmap_atomic(to_page, KM_USER1);
+ memcpy(to_virtual, from_virtual, PAGE_SIZE);
+ kunmap_atomic(to_virtual, KM_USER1);
+ kunmap_atomic(from_virtual, KM_USER0);
+ preempt_enable();
+ set_page_dirty(to_page);
+ mark_page_accessed(to_page);
+ page_cache_release(to_page);
+ }
+
+ ttm_tt_free_alloced_pages(ttm);
+ ttm->swap_storage = swap_storage;
+ ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
+ if (persistant_swap_storage)
+ ttm->page_flags |= TTM_PAGE_FLAG_PERSISTANT_SWAP;
+
+ return 0;
+out_err:
+ if (!persistant_swap_storage)
+ fput(swap_storage);
+
+ return -ENOMEM;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-19 07:14:22 +0000