[Intel-gfx] [RFC] drm/i915: Split out i915_vma.c
Joonas Lahtinen
joonas.lahtinen at linux.intel.com
Thu Nov 10 08:55:44 UTC 2016
As a side product, had to split two other files;
- i915_fence_reg.h
- i915_gem_object.h (only parts that needed immediate untanglement)
I tried to move code in as big chunks as possible, to make review
easier. i915_vma_compare was moved to a header.
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/i915_drv.h | 382 +------------------
drivers/gpu/drm/i915/i915_fence_reg.h | 51 +++
drivers/gpu/drm/i915/i915_gem.c | 370 ------------------
drivers/gpu/drm/i915/i915_gem_gtt.c | 276 +-------------
drivers/gpu/drm/i915/i915_gem_gtt.h | 225 +----------
drivers/gpu/drm/i915/i915_gem_object.h | 337 +++++++++++++++++
drivers/gpu/drm/i915/i915_gem_request.h | 3 +
drivers/gpu/drm/i915/i915_vma.c | 648 ++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_vma.h | 342 +++++++++++++++++
10 files changed, 1400 insertions(+), 1235 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_fence_reg.h
create mode 100644 drivers/gpu/drm/i915/i915_gem_object.h
create mode 100644 drivers/gpu/drm/i915/i915_vma.c
create mode 100644 drivers/gpu/drm/i915/i915_vma.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 0857e50..20102e2 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -45,6 +45,7 @@ i915-y += i915_cmd_parser.o \
i915_gem_timeline.o \
i915_gem_userptr.o \
i915_trace_points.o \
+ i915_vma.o \
intel_breadcrumbs.o \
intel_engine_cs.o \
intel_hangcheck.o \
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index d868979..c3988ee 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -60,11 +60,14 @@
#include "intel_ringbuffer.h"
#include "i915_gem.h"
+#include "i915_gem_object.h"
#include "i915_gem_gtt.h"
#include "i915_gem_render_state.h"
#include "i915_gem_request.h"
#include "i915_gem_timeline.h"
+#include "i915_vma.h"
+
#include "intel_gvt.h"
/* General customization:
@@ -459,22 +462,7 @@ struct intel_opregion {
struct intel_overlay;
struct intel_overlay_error_state;
-struct drm_i915_fence_reg {
- struct list_head link;
- struct drm_i915_private *i915;
- struct i915_vma *vma;
- int pin_count;
- int id;
- /**
- * Whether the tiling parameters for the currently
- * associated fence register have changed. Note that
- * for the purposes of tracking tiling changes we also
- * treat the unfenced register, the register slot that
- * the object occupies whilst it executes a fenced
- * command (such as BLT on gen2/3), as a "fence".
- */
- bool dirty;
-};
+#include "i915_fence_reg.h"
struct sdvo_device_mapping {
u8 initialized;
@@ -2178,31 +2166,6 @@ enum hdmi_force_audio {
#define I915_GTT_OFFSET_NONE ((u32)-1)
-struct drm_i915_gem_object_ops {
- unsigned int flags;
-#define I915_GEM_OBJECT_HAS_STRUCT_PAGE 0x1
-#define I915_GEM_OBJECT_IS_SHRINKABLE 0x2
-
- /* Interface between the GEM object and its backing storage.
- * get_pages() is called once prior to the use of the associated set
- * of pages before to binding them into the GTT, and put_pages() is
- * called after we no longer need them. As we expect there to be
- * associated cost with migrating pages between the backing storage
- * and making them available for the GPU (e.g. clflush), we may hold
- * onto the pages after they are no longer referenced by the GPU
- * in case they may be used again shortly (for example migrating the
- * pages to a different memory domain within the GTT). put_pages()
- * will therefore most likely be called when the object itself is
- * being released or under memory pressure (where we attempt to
- * reap pages for the shrinker).
- */
- struct sg_table *(*get_pages)(struct drm_i915_gem_object *);
- void (*put_pages)(struct drm_i915_gem_object *, struct sg_table *);
-
- int (*dmabuf_export)(struct drm_i915_gem_object *);
- void (*release)(struct drm_i915_gem_object *);
-};
-
/*
* Frontbuffer tracking bits. Set in obj->frontbuffer_bits while a gem bo is
* considered to be the frontbuffer for the given plane interface-wise. This
@@ -2224,292 +2187,6 @@ struct drm_i915_gem_object_ops {
#define INTEL_FRONTBUFFER_ALL_MASK(pipe) \
(0xff << (INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe)))
-struct drm_i915_gem_object {
- struct drm_gem_object base;
-
- const struct drm_i915_gem_object_ops *ops;
-
- /** List of VMAs backed by this object */
- struct list_head vma_list;
- struct rb_root vma_tree;
-
- /** Stolen memory for this object, instead of being backed by shmem. */
- struct drm_mm_node *stolen;
- struct list_head global_list;
- union {
- struct rcu_head rcu;
- struct llist_node freed;
- };
-
- /**
- * Whether the object is currently in the GGTT mmap.
- */
- struct list_head userfault_link;
-
- /** Used in execbuf to temporarily hold a ref */
- struct list_head obj_exec_link;
-
- struct list_head batch_pool_link;
-
- unsigned long flags;
-
- /**
- * Have we taken a reference for the object for incomplete GPU
- * activity?
- */
-#define I915_BO_ACTIVE_REF 0
-
- /*
- * Is the object to be mapped as read-only to the GPU
- * Only honoured if hardware has relevant pte bit
- */
- unsigned long gt_ro:1;
- unsigned int cache_level:3;
- unsigned int cache_dirty:1;
-
- atomic_t frontbuffer_bits;
- unsigned int frontbuffer_ggtt_origin; /* write once */
-
- /** Current tiling stride for the object, if it's tiled. */
- unsigned int tiling_and_stride;
-#define FENCE_MINIMUM_STRIDE 128 /* See i915_tiling_ok() */
-#define TILING_MASK (FENCE_MINIMUM_STRIDE-1)
-#define STRIDE_MASK (~TILING_MASK)
-
- /** Count of VMA actually bound by this object */
- unsigned int bind_count;
- unsigned int active_count;
- unsigned int pin_display;
-
- struct {
- struct mutex lock; /* protects the pages and their use */
- atomic_t pages_pin_count;
-
- struct sg_table *pages;
- void *mapping;
-
- struct i915_gem_object_page_iter {
- struct scatterlist *sg_pos;
- unsigned int sg_idx; /* in pages, but 32bit eek! */
-
- struct radix_tree_root radix;
- struct mutex lock; /* protects this cache */
- } get_page;
-
- /**
- * Advice: are the backing pages purgeable?
- */
- unsigned int madv:2;
-
- /**
- * This is set if the object has been written to since the
- * pages were last acquired.
- */
- bool dirty:1;
-
- /**
- * This is set if the object has been pinned due to unknown
- * swizzling.
- */
- bool quirked:1;
- } mm;
-
- /** Breadcrumb of last rendering to the buffer.
- * There can only be one writer, but we allow for multiple readers.
- * If there is a writer that necessarily implies that all other
- * read requests are complete - but we may only be lazily clearing
- * the read requests. A read request is naturally the most recent
- * request on a ring, so we may have two different write and read
- * requests on one ring where the write request is older than the
- * read request. This allows for the CPU to read from an active
- * buffer by only waiting for the write to complete.
- */
- struct reservation_object *resv;
-
- /** References from framebuffers, locks out tiling changes. */
- unsigned long framebuffer_references;
-
- /** Record of address bit 17 of each page at last unbind. */
- unsigned long *bit_17;
-
- struct i915_gem_userptr {
- uintptr_t ptr;
- unsigned read_only :1;
-
- struct i915_mm_struct *mm;
- struct i915_mmu_object *mmu_object;
- struct work_struct *work;
- } userptr;
-
- /** for phys allocated objects */
- struct drm_dma_handle *phys_handle;
-
- struct reservation_object __builtin_resv;
-};
-
-static inline struct drm_i915_gem_object *
-to_intel_bo(struct drm_gem_object *gem)
-{
- /* Assert that to_intel_bo(NULL) == NULL */
- BUILD_BUG_ON(offsetof(struct drm_i915_gem_object, base));
-
- return container_of(gem, struct drm_i915_gem_object, base);
-}
-
-/**
- * i915_gem_object_lookup_rcu - look up a temporary GEM object from its handle
- * @filp: DRM file private date
- * @handle: userspace handle
- *
- * Returns:
- *
- * A pointer to the object named by the handle if such exists on @filp, NULL
- * otherwise. This object is only valid whilst under the RCU read lock, and
- * note carefully the object may be in the process of being destroyed.
- */
-static inline struct drm_i915_gem_object *
-i915_gem_object_lookup_rcu(struct drm_file *file, u32 handle)
-{
-#ifdef CONFIG_LOCKDEP
- WARN_ON(debug_locks && !lock_is_held(&rcu_lock_map));
-#endif
- return idr_find(&file->object_idr, handle);
-}
-
-static inline struct drm_i915_gem_object *
-i915_gem_object_lookup(struct drm_file *file, u32 handle)
-{
- struct drm_i915_gem_object *obj;
-
- rcu_read_lock();
- obj = i915_gem_object_lookup_rcu(file, handle);
- if (obj && !kref_get_unless_zero(&obj->base.refcount))
- obj = NULL;
- rcu_read_unlock();
-
- return obj;
-}
-
-__deprecated
-extern struct drm_gem_object *
-drm_gem_object_lookup(struct drm_file *file, u32 handle);
-
-__attribute__((nonnull))
-static inline struct drm_i915_gem_object *
-i915_gem_object_get(struct drm_i915_gem_object *obj)
-{
- drm_gem_object_reference(&obj->base);
- return obj;
-}
-
-__deprecated
-extern void drm_gem_object_reference(struct drm_gem_object *);
-
-__attribute__((nonnull))
-static inline void
-i915_gem_object_put(struct drm_i915_gem_object *obj)
-{
- __drm_gem_object_unreference(&obj->base);
-}
-
-__deprecated
-extern void drm_gem_object_unreference(struct drm_gem_object *);
-
-__deprecated
-extern void drm_gem_object_unreference_unlocked(struct drm_gem_object *);
-
-static inline bool
-i915_gem_object_is_dead(const struct drm_i915_gem_object *obj)
-{
- return atomic_read(&obj->base.refcount.refcount) == 0;
-}
-
-static inline bool
-i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
-{
- return obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE;
-}
-
-static inline bool
-i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj)
-{
- return obj->ops->flags & I915_GEM_OBJECT_IS_SHRINKABLE;
-}
-
-static inline bool
-i915_gem_object_is_active(const struct drm_i915_gem_object *obj)
-{
- return obj->active_count;
-}
-
-static inline bool
-i915_gem_object_has_active_reference(const struct drm_i915_gem_object *obj)
-{
- return test_bit(I915_BO_ACTIVE_REF, &obj->flags);
-}
-
-static inline void
-i915_gem_object_set_active_reference(struct drm_i915_gem_object *obj)
-{
- lockdep_assert_held(&obj->base.dev->struct_mutex);
- __set_bit(I915_BO_ACTIVE_REF, &obj->flags);
-}
-
-static inline void
-i915_gem_object_clear_active_reference(struct drm_i915_gem_object *obj)
-{
- lockdep_assert_held(&obj->base.dev->struct_mutex);
- __clear_bit(I915_BO_ACTIVE_REF, &obj->flags);
-}
-
-void __i915_gem_object_release_unless_active(struct drm_i915_gem_object *obj);
-
-static inline unsigned int
-i915_gem_object_get_tiling(struct drm_i915_gem_object *obj)
-{
- return obj->tiling_and_stride & TILING_MASK;
-}
-
-static inline bool
-i915_gem_object_is_tiled(struct drm_i915_gem_object *obj)
-{
- return i915_gem_object_get_tiling(obj) != I915_TILING_NONE;
-}
-
-static inline unsigned int
-i915_gem_object_get_stride(struct drm_i915_gem_object *obj)
-{
- return obj->tiling_and_stride & STRIDE_MASK;
-}
-
-static inline struct intel_engine_cs *
-i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
-{
- struct intel_engine_cs *engine = NULL;
- struct dma_fence *fence;
-
- rcu_read_lock();
- fence = reservation_object_get_excl_rcu(obj->resv);
- rcu_read_unlock();
-
- if (fence && dma_fence_is_i915(fence) && !dma_fence_is_signaled(fence))
- engine = to_request(fence)->engine;
- dma_fence_put(fence);
-
- return engine;
-}
-
-static inline struct i915_vma *i915_vma_get(struct i915_vma *vma)
-{
- i915_gem_object_get(vma->obj);
- return vma;
-}
-
-static inline void i915_vma_put(struct i915_vma *vma)
-{
- i915_gem_object_put(vma->obj);
-}
-
/*
* Optimised SGL iterator for GEM objects
*/
@@ -3217,13 +2894,6 @@ i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
u64 alignment,
u64 flags);
-int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
- u32 flags);
-void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
-int __must_check i915_vma_unbind(struct i915_vma *vma);
-void i915_vma_close(struct i915_vma *vma);
-void i915_vma_destroy(struct i915_vma *vma);
-
int i915_gem_object_unbind(struct drm_i915_gem_object *obj);
void i915_gem_release_mmap(struct drm_i915_gem_object *obj);
@@ -3477,50 +3147,6 @@ i915_gem_object_ggtt_offset(struct drm_i915_gem_object *o,
int __must_check i915_vma_get_fence(struct i915_vma *vma);
int __must_check i915_vma_put_fence(struct i915_vma *vma);
-/**
- * i915_vma_pin_fence - pin fencing state
- * @vma: vma to pin fencing for
- *
- * This pins the fencing state (whether tiled or untiled) to make sure the
- * vma (and its object) is ready to be used as a scanout target. Fencing
- * status must be synchronize first by calling i915_vma_get_fence():
- *
- * The resulting fence pin reference must be released again with
- * i915_vma_unpin_fence().
- *
- * Returns:
- *
- * True if the vma has a fence, false otherwise.
- */
-static inline bool
-i915_vma_pin_fence(struct i915_vma *vma)
-{
- lockdep_assert_held(&vma->vm->dev->struct_mutex);
- if (vma->fence) {
- vma->fence->pin_count++;
- return true;
- } else
- return false;
-}
-
-/**
- * i915_vma_unpin_fence - unpin fencing state
- * @vma: vma to unpin fencing for
- *
- * This releases the fence pin reference acquired through
- * i915_vma_pin_fence. It will handle both objects with and without an
- * attached fence correctly, callers do not need to distinguish this.
- */
-static inline void
-i915_vma_unpin_fence(struct i915_vma *vma)
-{
- lockdep_assert_held(&vma->vm->dev->struct_mutex);
- if (vma->fence) {
- GEM_BUG_ON(vma->fence->pin_count <= 0);
- vma->fence->pin_count--;
- }
-}
-
void i915_gem_restore_fences(struct drm_device *dev);
void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/i915_fence_reg.h b/drivers/gpu/drm/i915/i915_fence_reg.h
new file mode 100644
index 0000000..22c4a2d
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_fence_reg.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __I915_FENCE_REG_H__
+#define __I915_FENCE_REG_H__
+
+#include <linux/list.h>
+
+struct drm_i915_private;
+struct i915_vma;
+
+struct drm_i915_fence_reg {
+ struct list_head link;
+ struct drm_i915_private *i915;
+ struct i915_vma *vma;
+ int pin_count;
+ int id;
+ /**
+ * Whether the tiling parameters for the currently
+ * associated fence register have changed. Note that
+ * for the purposes of tracking tiling changes we also
+ * treat the unfenced register, the register slot that
+ * the object occupies whilst it executes a fenced
+ * command (such as BLT on gen2/3), as a "fence".
+ */
+ bool dirty;
+};
+
+#endif
+
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a97fdfa..657a72b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2872,117 +2872,6 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
return ret;
}
-static void __i915_vma_iounmap(struct i915_vma *vma)
-{
- GEM_BUG_ON(i915_vma_is_pinned(vma));
-
- if (vma->iomap == NULL)
- return;
-
- io_mapping_unmap(vma->iomap);
- vma->iomap = NULL;
-}
-
-int i915_vma_unbind(struct i915_vma *vma)
-{
- struct drm_i915_gem_object *obj = vma->obj;
- unsigned long active;
- int ret;
-
- lockdep_assert_held(&obj->base.dev->struct_mutex);
-
- /* First wait upon any activity as retiring the request may
- * have side-effects such as unpinning or even unbinding this vma.
- */
- active = i915_vma_get_active(vma);
- if (active) {
- int idx;
-
- /* When a closed VMA is retired, it is unbound - eek.
- * In order to prevent it from being recursively closed,
- * take a pin on the vma so that the second unbind is
- * aborted.
- *
- * Even more scary is that the retire callback may free
- * the object (last active vma). To prevent the explosion
- * we defer the actual object free to a worker that can
- * only proceed once it acquires the struct_mutex (which
- * we currently hold, therefore it cannot free this object
- * before we are finished).
- */
- __i915_vma_pin(vma);
-
- for_each_active(active, idx) {
- ret = i915_gem_active_retire(&vma->last_read[idx],
- &vma->vm->dev->struct_mutex);
- if (ret)
- break;
- }
-
- __i915_vma_unpin(vma);
- if (ret)
- return ret;
-
- GEM_BUG_ON(i915_vma_is_active(vma));
- }
-
- if (i915_vma_is_pinned(vma))
- return -EBUSY;
-
- if (!drm_mm_node_allocated(&vma->node))
- goto destroy;
-
- GEM_BUG_ON(obj->bind_count == 0);
- GEM_BUG_ON(!obj->mm.pages);
-
- if (i915_vma_is_map_and_fenceable(vma)) {
- /* release the fence reg _after_ flushing */
- ret = i915_vma_put_fence(vma);
- if (ret)
- return ret;
-
- /* Force a pagefault for domain tracking on next user access */
- i915_gem_release_mmap(obj);
-
- __i915_vma_iounmap(vma);
- vma->flags &= ~I915_VMA_CAN_FENCE;
- }
-
- if (likely(!vma->vm->closed)) {
- trace_i915_vma_unbind(vma);
- vma->vm->unbind_vma(vma);
- }
- vma->flags &= ~(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
-
- drm_mm_remove_node(&vma->node);
- list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
-
- if (vma->pages != obj->mm.pages) {
- GEM_BUG_ON(!vma->pages);
- sg_free_table(vma->pages);
- kfree(vma->pages);
- }
- vma->pages = NULL;
-
- /* Since the unbound list is global, only move to that list if
- * no more VMAs exist. */
- if (--obj->bind_count == 0)
- list_move_tail(&obj->global_list,
- &to_i915(obj->base.dev)->mm.unbound_list);
-
- /* And finally now the object is completely decoupled from this vma,
- * we can drop its hold on the backing storage and allow it to be
- * reaped by the shrinker.
- */
- i915_gem_object_unpin_pages(obj);
-
-destroy:
- if (unlikely(i915_vma_is_closed(vma)))
- i915_vma_destroy(vma);
-
- return 0;
-}
-
static int wait_for_timeline(struct i915_gem_timeline *tl, unsigned int flags)
{
int ret, i;
@@ -3010,171 +2899,6 @@ int i915_gem_wait_for_idle(struct drm_i915_private *i915, unsigned int flags)
return 0;
}
-static bool i915_gem_valid_gtt_space(struct i915_vma *vma,
- unsigned long cache_level)
-{
- struct drm_mm_node *gtt_space = &vma->node;
- struct drm_mm_node *other;
-
- /*
- * On some machines we have to be careful when putting differing types
- * of snoopable memory together to avoid the prefetcher crossing memory
- * domains and dying. During vm initialisation, we decide whether or not
- * these constraints apply and set the drm_mm.color_adjust
- * appropriately.
- */
- if (vma->vm->mm.color_adjust == NULL)
- return true;
-
- if (!drm_mm_node_allocated(gtt_space))
- return true;
-
- if (list_empty(>t_space->node_list))
- return true;
-
- other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
- if (other->allocated && !other->hole_follows && other->color != cache_level)
- return false;
-
- other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
- if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
- return false;
-
- return true;
-}
-
-/**
- * i915_vma_insert - finds a slot for the vma in its address space
- * @vma: the vma
- * @size: requested size in bytes (can be larger than the VMA)
- * @alignment: required alignment
- * @flags: mask of PIN_* flags to use
- *
- * First we try to allocate some free space that meets the requirements for
- * the VMA. Failiing that, if the flags permit, it will evict an old VMA,
- * preferrably the oldest idle entry to make room for the new VMA.
- *
- * Returns:
- * 0 on success, negative error code otherwise.
- */
-static int
-i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
-{
- struct drm_i915_private *dev_priv = to_i915(vma->vm->dev);
- struct drm_i915_gem_object *obj = vma->obj;
- u64 start, end;
- int ret;
-
- GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
- GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
-
- size = max(size, vma->size);
- if (flags & PIN_MAPPABLE)
- size = i915_gem_get_ggtt_size(dev_priv, size,
- i915_gem_object_get_tiling(obj));
-
- alignment = max(max(alignment, vma->display_alignment),
- i915_gem_get_ggtt_alignment(dev_priv, size,
- i915_gem_object_get_tiling(obj),
- flags & PIN_MAPPABLE));
-
- start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
-
- end = vma->vm->total;
- if (flags & PIN_MAPPABLE)
- end = min_t(u64, end, dev_priv->ggtt.mappable_end);
- if (flags & PIN_ZONE_4G)
- end = min_t(u64, end, (1ULL << 32) - PAGE_SIZE);
-
- /* If binding the object/GGTT view requires more space than the entire
- * aperture has, reject it early before evicting everything in a vain
- * attempt to find space.
- */
- if (size > end) {
- DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu [object=%zd] > %s aperture=%llu\n",
- size, obj->base.size,
- flags & PIN_MAPPABLE ? "mappable" : "total",
- end);
- return -E2BIG;
- }
-
- ret = i915_gem_object_pin_pages(obj);
- if (ret)
- return ret;
-
- if (flags & PIN_OFFSET_FIXED) {
- u64 offset = flags & PIN_OFFSET_MASK;
- if (offset & (alignment - 1) || offset > end - size) {
- ret = -EINVAL;
- goto err_unpin;
- }
-
- vma->node.start = offset;
- vma->node.size = size;
- vma->node.color = obj->cache_level;
- ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
- if (ret) {
- ret = i915_gem_evict_for_vma(vma);
- if (ret == 0)
- ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
- if (ret)
- goto err_unpin;
- }
- } else {
- u32 search_flag, alloc_flag;
-
- if (flags & PIN_HIGH) {
- search_flag = DRM_MM_SEARCH_BELOW;
- alloc_flag = DRM_MM_CREATE_TOP;
- } else {
- search_flag = DRM_MM_SEARCH_DEFAULT;
- alloc_flag = DRM_MM_CREATE_DEFAULT;
- }
-
- /* We only allocate in PAGE_SIZE/GTT_PAGE_SIZE (4096) chunks,
- * so we know that we always have a minimum alignment of 4096.
- * The drm_mm range manager is optimised to return results
- * with zero alignment, so where possible use the optimal
- * path.
- */
- if (alignment <= 4096)
- alignment = 0;
-
-search_free:
- ret = drm_mm_insert_node_in_range_generic(&vma->vm->mm,
- &vma->node,
- size, alignment,
- obj->cache_level,
- start, end,
- search_flag,
- alloc_flag);
- if (ret) {
- ret = i915_gem_evict_something(vma->vm, size, alignment,
- obj->cache_level,
- start, end,
- flags);
- if (ret == 0)
- goto search_free;
-
- goto err_unpin;
- }
-
- GEM_BUG_ON(vma->node.start < start);
- GEM_BUG_ON(vma->node.start + vma->node.size > end);
- }
- GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level));
-
- list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
- list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
- obj->bind_count++;
-
- return 0;
-
-err_unpin:
- i915_gem_object_unpin_pages(obj);
- return ret;
-}
-
bool
i915_gem_clflush_object(struct drm_i915_gem_object *obj,
bool force)
@@ -3763,100 +3487,6 @@ i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file)
return ret < 0 ? ret : 0;
}
-static bool
-i915_vma_misplaced(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
-{
- if (!drm_mm_node_allocated(&vma->node))
- return false;
-
- if (vma->node.size < size)
- return true;
-
- if (alignment && vma->node.start & (alignment - 1))
- return true;
-
- if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma))
- return true;
-
- if (flags & PIN_OFFSET_BIAS &&
- vma->node.start < (flags & PIN_OFFSET_MASK))
- return true;
-
- if (flags & PIN_OFFSET_FIXED &&
- vma->node.start != (flags & PIN_OFFSET_MASK))
- return true;
-
- return false;
-}
-
-void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
-{
- struct drm_i915_gem_object *obj = vma->obj;
- struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
- bool mappable, fenceable;
- u32 fence_size, fence_alignment;
-
- fence_size = i915_gem_get_ggtt_size(dev_priv,
- vma->size,
- i915_gem_object_get_tiling(obj));
- fence_alignment = i915_gem_get_ggtt_alignment(dev_priv,
- vma->size,
- i915_gem_object_get_tiling(obj),
- true);
-
- fenceable = (vma->node.size == fence_size &&
- (vma->node.start & (fence_alignment - 1)) == 0);
-
- mappable = (vma->node.start + fence_size <=
- dev_priv->ggtt.mappable_end);
-
- /*
- * Explicitly disable for rotated VMA since the display does not
- * need the fence and the VMA is not accessible to other users.
- */
- if (mappable && fenceable &&
- vma->ggtt_view.type != I915_GGTT_VIEW_ROTATED)
- vma->flags |= I915_VMA_CAN_FENCE;
- else
- vma->flags &= ~I915_VMA_CAN_FENCE;
-}
-
-int __i915_vma_do_pin(struct i915_vma *vma,
- u64 size, u64 alignment, u64 flags)
-{
- unsigned int bound = vma->flags;
- int ret;
-
- lockdep_assert_held(&vma->vm->dev->struct_mutex);
- GEM_BUG_ON((flags & (PIN_GLOBAL | PIN_USER)) == 0);
- GEM_BUG_ON((flags & PIN_GLOBAL) && !i915_vma_is_ggtt(vma));
-
- if (WARN_ON(bound & I915_VMA_PIN_OVERFLOW)) {
- ret = -EBUSY;
- goto err;
- }
-
- if ((bound & I915_VMA_BIND_MASK) == 0) {
- ret = i915_vma_insert(vma, size, alignment, flags);
- if (ret)
- goto err;
- }
-
- ret = i915_vma_bind(vma, vma->obj->cache_level, flags);
- if (ret)
- goto err;
-
- if ((bound ^ vma->flags) & I915_VMA_GLOBAL_BIND)
- __i915_vma_set_map_and_fenceable(vma);
-
- GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
- return 0;
-
-err:
- __i915_vma_unpin(vma);
- return ret;
-}
-
struct i915_vma *
i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
const struct i915_ggtt_view *view,
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 67606bf..2631f4f 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -96,13 +96,6 @@
*
*/
-static inline struct i915_ggtt *
-i915_vm_to_ggtt(struct i915_address_space *vm)
-{
- GEM_BUG_ON(!i915_is_ggtt(vm));
- return container_of(vm, struct i915_ggtt, base);
-}
-
static int
i915_get_ggtt_vma_pages(struct i915_vma *vma);
@@ -3348,175 +3341,6 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev)
i915_ggtt_flush(dev_priv);
}
-static void
-i915_vma_retire(struct i915_gem_active *active,
- struct drm_i915_gem_request *rq)
-{
- const unsigned int idx = rq->engine->id;
- struct i915_vma *vma =
- container_of(active, struct i915_vma, last_read[idx]);
- struct drm_i915_gem_object *obj = vma->obj;
-
- GEM_BUG_ON(!i915_vma_has_active_engine(vma, idx));
-
- i915_vma_clear_active(vma, idx);
- if (i915_vma_is_active(vma))
- return;
-
- list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
- if (unlikely(i915_vma_is_closed(vma) && !i915_vma_is_pinned(vma)))
- WARN_ON(i915_vma_unbind(vma));
-
- GEM_BUG_ON(!i915_gem_object_is_active(obj));
- if (--obj->active_count)
- return;
-
- /* Bump our place on the bound list to keep it roughly in LRU order
- * so that we don't steal from recently used but inactive objects
- * (unless we are forced to ofc!)
- */
- if (obj->bind_count)
- list_move_tail(&obj->global_list, &rq->i915->mm.bound_list);
-
- obj->mm.dirty = true; /* be paranoid */
-
- if (i915_gem_object_has_active_reference(obj)) {
- i915_gem_object_clear_active_reference(obj);
- i915_gem_object_put(obj);
- }
-}
-
-static void
-i915_ggtt_retire__write(struct i915_gem_active *active,
- struct drm_i915_gem_request *request)
-{
- struct i915_vma *vma =
- container_of(active, struct i915_vma, last_write);
-
- intel_fb_obj_flush(vma->obj, true, ORIGIN_CS);
-}
-
-void i915_vma_destroy(struct i915_vma *vma)
-{
- GEM_BUG_ON(vma->node.allocated);
- GEM_BUG_ON(i915_vma_is_active(vma));
- GEM_BUG_ON(!i915_vma_is_closed(vma));
- GEM_BUG_ON(vma->fence);
-
- rb_erase(&vma->obj_node, &vma->obj->vma_tree);
- list_del(&vma->vm_link);
- if (!i915_vma_is_ggtt(vma))
- i915_ppgtt_put(i915_vm_to_ppgtt(vma->vm));
-
- kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma);
-}
-
-void i915_vma_close(struct i915_vma *vma)
-{
- GEM_BUG_ON(i915_vma_is_closed(vma));
- vma->flags |= I915_VMA_CLOSED;
-
- list_del_init(&vma->obj_link);
- if (!i915_vma_is_active(vma) && !i915_vma_is_pinned(vma))
- WARN_ON(i915_vma_unbind(vma));
-}
-
-static inline long vma_compare(struct i915_vma *vma,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view)
-{
- GEM_BUG_ON(view && !i915_vma_is_ggtt(vma));
-
- if (vma->vm != vm)
- return vma->vm - vm;
-
- if (!view)
- return vma->ggtt_view.type;
-
- if (vma->ggtt_view.type != view->type)
- return vma->ggtt_view.type - view->type;
-
- return memcmp(&vma->ggtt_view.params,
- &view->params,
- sizeof(view->params));
-}
-
-static struct i915_vma *
-__i915_vma_create(struct drm_i915_gem_object *obj,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view)
-{
- struct i915_vma *vma;
- struct rb_node *rb, **p;
- int i;
-
- GEM_BUG_ON(vm->closed);
-
- vma = kmem_cache_zalloc(to_i915(obj->base.dev)->vmas, GFP_KERNEL);
- if (vma == NULL)
- return ERR_PTR(-ENOMEM);
-
- INIT_LIST_HEAD(&vma->exec_list);
- for (i = 0; i < ARRAY_SIZE(vma->last_read); i++)
- init_request_active(&vma->last_read[i], i915_vma_retire);
- init_request_active(&vma->last_write,
- i915_is_ggtt(vm) ? i915_ggtt_retire__write : NULL);
- init_request_active(&vma->last_fence, NULL);
- list_add(&vma->vm_link, &vm->unbound_list);
- vma->vm = vm;
- vma->obj = obj;
- vma->size = obj->base.size;
-
- if (view) {
- vma->ggtt_view = *view;
- if (view->type == I915_GGTT_VIEW_PARTIAL) {
- vma->size = view->params.partial.size;
- vma->size <<= PAGE_SHIFT;
- } else if (view->type == I915_GGTT_VIEW_ROTATED) {
- vma->size =
- intel_rotation_info_size(&view->params.rotated);
- vma->size <<= PAGE_SHIFT;
- }
- }
-
- if (i915_is_ggtt(vm)) {
- vma->flags |= I915_VMA_GGTT;
- list_add(&vma->obj_link, &obj->vma_list);
- } else {
- i915_ppgtt_get(i915_vm_to_ppgtt(vm));
- list_add_tail(&vma->obj_link, &obj->vma_list);
- }
-
- rb = NULL;
- p = &obj->vma_tree.rb_node;
- while (*p) {
- struct i915_vma *pos;
-
- rb = *p;
- pos = rb_entry(rb, struct i915_vma, obj_node);
- if (vma_compare(pos, vm, view) < 0)
- p = &rb->rb_right;
- else
- p = &rb->rb_left;
- }
- rb_link_node(&vma->obj_node, rb, p);
- rb_insert_color(&vma->obj_node, &obj->vma_tree);
-
- return vma;
-}
-
-struct i915_vma *
-i915_vma_create(struct drm_i915_gem_object *obj,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view)
-{
- lockdep_assert_held(&obj->base.dev->struct_mutex);
- GEM_BUG_ON(view && !i915_is_ggtt(vm));
- GEM_BUG_ON(i915_gem_obj_to_vma(obj, vm, view));
-
- return __i915_vma_create(obj, vm, view);
-}
-
struct i915_vma *
i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
struct i915_address_space *vm,
@@ -3529,7 +3353,7 @@ i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node);
long cmp;
- cmp = vma_compare(vma, vm, view);
+ cmp = i915_vma_compare(vma, vm, view);
if (cmp == 0)
return vma;
@@ -3554,7 +3378,7 @@ i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object *obj,
vma = i915_gem_obj_to_vma(obj, vm, view);
if (!vma) {
- vma = __i915_vma_create(obj, vm, view);
+ vma = i915_vma_create(obj, vm, view);
GEM_BUG_ON(vma != i915_gem_obj_to_vma(obj, vm, view));
}
@@ -3739,99 +3563,3 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma)
return ret;
}
-/**
- * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.
- * @vma: VMA to map
- * @cache_level: mapping cache level
- * @flags: flags like global or local mapping
- *
- * DMA addresses are taken from the scatter-gather table of this object (or of
- * this VMA in case of non-default GGTT views) and PTE entries set up.
- * Note that DMA addresses are also the only part of the SG table we care about.
- */
-int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
- u32 flags)
-{
- u32 bind_flags;
- u32 vma_flags;
- int ret;
-
- if (WARN_ON(flags == 0))
- return -EINVAL;
-
- bind_flags = 0;
- if (flags & PIN_GLOBAL)
- bind_flags |= I915_VMA_GLOBAL_BIND;
- if (flags & PIN_USER)
- bind_flags |= I915_VMA_LOCAL_BIND;
-
- vma_flags = vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
- if (flags & PIN_UPDATE)
- bind_flags |= vma_flags;
- else
- bind_flags &= ~vma_flags;
- if (bind_flags == 0)
- return 0;
-
- if (vma_flags == 0 && vma->vm->allocate_va_range) {
- trace_i915_va_alloc(vma);
- ret = vma->vm->allocate_va_range(vma->vm,
- vma->node.start,
- vma->node.size);
- if (ret)
- return ret;
- }
-
- ret = vma->vm->bind_vma(vma, cache_level, bind_flags);
- if (ret)
- return ret;
-
- vma->flags |= bind_flags;
- return 0;
-}
-
-void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
-{
- void __iomem *ptr;
-
- /* Access through the GTT requires the device to be awake. */
- assert_rpm_wakelock_held(to_i915(vma->vm->dev));
-
- lockdep_assert_held(&vma->vm->dev->struct_mutex);
- if (WARN_ON(!i915_vma_is_map_and_fenceable(vma)))
- return IO_ERR_PTR(-ENODEV);
-
- GEM_BUG_ON(!i915_vma_is_ggtt(vma));
- GEM_BUG_ON((vma->flags & I915_VMA_GLOBAL_BIND) == 0);
-
- ptr = vma->iomap;
- if (ptr == NULL) {
- ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->mappable,
- vma->node.start,
- vma->node.size);
- if (ptr == NULL)
- return IO_ERR_PTR(-ENOMEM);
-
- vma->iomap = ptr;
- }
-
- __i915_vma_pin(vma);
- return ptr;
-}
-
-void i915_vma_unpin_and_release(struct i915_vma **p_vma)
-{
- struct i915_vma *vma;
- struct drm_i915_gem_object *obj;
-
- vma = fetch_and_zero(p_vma);
- if (!vma)
- return;
-
- obj = vma->obj;
-
- i915_vma_unpin(vma);
- i915_vma_close(vma);
-
- __i915_gem_object_release_unless_active(obj);
-}
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index c23ef9d..57b5849 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -35,7 +35,9 @@
#define __I915_GEM_GTT_H__
#include <linux/io-mapping.h>
+#include <linux/mm.h>
+#include "i915_gem_timeline.h"
#include "i915_gem_request.h"
#define I915_FENCE_REG_NONE -1
@@ -138,6 +140,8 @@ typedef uint64_t gen8_ppgtt_pml4e_t;
#define GEN8_PPAT_ELLC_OVERRIDE (0<<2)
#define GEN8_PPAT(i, x) ((uint64_t) (x) << ((i) * 8))
+struct sg_table;
+
enum i915_ggtt_view_type {
I915_GGTT_VIEW_NORMAL = 0,
I915_GGTT_VIEW_ROTATED,
@@ -168,135 +172,7 @@ extern const struct i915_ggtt_view i915_ggtt_view_rotated;
enum i915_cache_level;
-/**
- * A VMA represents a GEM BO that is bound into an address space. Therefore, a
- * VMA's presence cannot be guaranteed before binding, or after unbinding the
- * object into/from the address space.
- *
- * To make things as simple as possible (ie. no refcounting), a VMA's lifetime
- * will always be <= an objects lifetime. So object refcounting should cover us.
- */
-struct i915_vma {
- struct drm_mm_node node;
- struct drm_i915_gem_object *obj;
- struct i915_address_space *vm;
- struct drm_i915_fence_reg *fence;
- struct sg_table *pages;
- void __iomem *iomap;
- u64 size;
- u64 display_alignment;
-
- unsigned int flags;
- /**
- * How many users have pinned this object in GTT space. The following
- * users can each hold at most one reference: pwrite/pread, execbuffer
- * (objects are not allowed multiple times for the same batchbuffer),
- * and the framebuffer code. When switching/pageflipping, the
- * framebuffer code has at most two buffers pinned per crtc.
- *
- * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
- * bits with absolutely no headroom. So use 4 bits.
- */
-#define I915_VMA_PIN_MASK 0xf
-#define I915_VMA_PIN_OVERFLOW BIT(5)
-
- /** Flags and address space this VMA is bound to */
-#define I915_VMA_GLOBAL_BIND BIT(6)
-#define I915_VMA_LOCAL_BIND BIT(7)
-#define I915_VMA_BIND_MASK (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND | I915_VMA_PIN_OVERFLOW)
-
-#define I915_VMA_GGTT BIT(8)
-#define I915_VMA_CAN_FENCE BIT(9)
-#define I915_VMA_CLOSED BIT(10)
-
- unsigned int active;
- struct i915_gem_active last_read[I915_NUM_ENGINES];
- struct i915_gem_active last_write;
- struct i915_gem_active last_fence;
-
- /**
- * Support different GGTT views into the same object.
- * This means there can be multiple VMA mappings per object and per VM.
- * i915_ggtt_view_type is used to distinguish between those entries.
- * The default one of zero (I915_GGTT_VIEW_NORMAL) is default and also
- * assumed in GEM functions which take no ggtt view parameter.
- */
- struct i915_ggtt_view ggtt_view;
-
- /** This object's place on the active/inactive lists */
- struct list_head vm_link;
-
- struct list_head obj_link; /* Link in the object's VMA list */
- struct rb_node obj_node;
-
- /** This vma's place in the batchbuffer or on the eviction list */
- struct list_head exec_list;
-
- /**
- * Used for performing relocations during execbuffer insertion.
- */
- struct hlist_node exec_node;
- unsigned long exec_handle;
- struct drm_i915_gem_exec_object2 *exec_entry;
-};
-
-struct i915_vma *
-i915_vma_create(struct drm_i915_gem_object *obj,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view);
-void i915_vma_unpin_and_release(struct i915_vma **p_vma);
-
-static inline bool i915_vma_is_ggtt(const struct i915_vma *vma)
-{
- return vma->flags & I915_VMA_GGTT;
-}
-
-static inline bool i915_vma_is_map_and_fenceable(const struct i915_vma *vma)
-{
- return vma->flags & I915_VMA_CAN_FENCE;
-}
-
-static inline bool i915_vma_is_closed(const struct i915_vma *vma)
-{
- return vma->flags & I915_VMA_CLOSED;
-}
-
-static inline unsigned int i915_vma_get_active(const struct i915_vma *vma)
-{
- return vma->active;
-}
-
-static inline bool i915_vma_is_active(const struct i915_vma *vma)
-{
- return i915_vma_get_active(vma);
-}
-
-static inline void i915_vma_set_active(struct i915_vma *vma,
- unsigned int engine)
-{
- vma->active |= BIT(engine);
-}
-
-static inline void i915_vma_clear_active(struct i915_vma *vma,
- unsigned int engine)
-{
- vma->active &= ~BIT(engine);
-}
-
-static inline bool i915_vma_has_active_engine(const struct i915_vma *vma,
- unsigned int engine)
-{
- return vma->active & BIT(engine);
-}
-
-static inline u32 i915_ggtt_offset(const struct i915_vma *vma)
-{
- GEM_BUG_ON(!i915_vma_is_ggtt(vma));
- GEM_BUG_ON(!vma->node.allocated);
- GEM_BUG_ON(upper_32_bits(vma->node.start));
- GEM_BUG_ON(upper_32_bits(vma->node.start + vma->node.size - 1));
- return lower_32_bits(vma->node.start);
-}
+struct i915_vma;
struct i915_page_dma {
struct page *page;
@@ -606,6 +482,13 @@ i915_page_dir_dma_addr(const struct i915_hw_ppgtt *ppgtt, const unsigned n)
px_dma(ppgtt->base.scratch_pd);
}
+static inline struct i915_ggtt *
+i915_vm_to_ggtt(struct i915_address_space *vm)
+{
+ GEM_BUG_ON(!i915_is_ggtt(vm));
+ return container_of(vm, struct i915_ggtt, base);
+}
+
int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv);
int i915_ggtt_init_hw(struct drm_i915_private *dev_priv);
int i915_ggtt_enable_hw(struct drm_i915_private *dev_priv);
@@ -653,88 +536,4 @@ void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj,
#define PIN_OFFSET_FIXED BIT(11)
#define PIN_OFFSET_MASK (~4095)
-int __i915_vma_do_pin(struct i915_vma *vma,
- u64 size, u64 alignment, u64 flags);
-static inline int __must_check
-i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
-{
- BUILD_BUG_ON(PIN_MBZ != I915_VMA_PIN_OVERFLOW);
- BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND);
- BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND);
-
- /* Pin early to prevent the shrinker/eviction logic from destroying
- * our vma as we insert and bind.
- */
- if (likely(((++vma->flags ^ flags) & I915_VMA_BIND_MASK) == 0))
- return 0;
-
- return __i915_vma_do_pin(vma, size, alignment, flags);
-}
-
-static inline int i915_vma_pin_count(const struct i915_vma *vma)
-{
- return vma->flags & I915_VMA_PIN_MASK;
-}
-
-static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
-{
- return i915_vma_pin_count(vma);
-}
-
-static inline void __i915_vma_pin(struct i915_vma *vma)
-{
- vma->flags++;
- GEM_BUG_ON(vma->flags & I915_VMA_PIN_OVERFLOW);
-}
-
-static inline void __i915_vma_unpin(struct i915_vma *vma)
-{
- GEM_BUG_ON(!i915_vma_is_pinned(vma));
- vma->flags--;
-}
-
-static inline void i915_vma_unpin(struct i915_vma *vma)
-{
- GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
- __i915_vma_unpin(vma);
-}
-
-/**
- * i915_vma_pin_iomap - calls ioremap_wc to map the GGTT VMA via the aperture
- * @vma: VMA to iomap
- *
- * The passed in VMA has to be pinned in the global GTT mappable region.
- * An extra pinning of the VMA is acquired for the return iomapping,
- * the caller must call i915_vma_unpin_iomap to relinquish the pinning
- * after the iomapping is no longer required.
- *
- * Callers must hold the struct_mutex.
- *
- * Returns a valid iomapped pointer or ERR_PTR.
- */
-void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
-#define IO_ERR_PTR(x) ((void __iomem *)ERR_PTR(x))
-
-/**
- * i915_vma_unpin_iomap - unpins the mapping returned from i915_vma_iomap
- * @vma: VMA to unpin
- *
- * Unpins the previously iomapped VMA from i915_vma_pin_iomap().
- *
- * Callers must hold the struct_mutex. This function is only valid to be
- * called on a VMA previously iomapped by the caller with i915_vma_pin_iomap().
- */
-static inline void i915_vma_unpin_iomap(struct i915_vma *vma)
-{
- lockdep_assert_held(&vma->vm->dev->struct_mutex);
- GEM_BUG_ON(vma->iomap == NULL);
- i915_vma_unpin(vma);
-}
-
-static inline struct page *i915_vma_first_page(struct i915_vma *vma)
-{
- GEM_BUG_ON(!vma->pages);
- return sg_page(vma->pages->sgl);
-}
-
#endif
diff --git a/drivers/gpu/drm/i915/i915_gem_object.h b/drivers/gpu/drm/i915/i915_gem_object.h
new file mode 100644
index 0000000..0826c25
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_object.h
@@ -0,0 +1,337 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __I915_GEM_OBJECT_H__
+#define __I915_GEM_OBJECT_H__
+
+#include <linux/reservation.h>
+
+#include <drm/drm_vma_manager.h>
+#include <drm/drm_gem.h>
+#include <drm/drmP.h>
+
+#include <drm/i915_drm.h>
+
+struct drm_i915_gem_object_ops {
+ unsigned int flags;
+#define I915_GEM_OBJECT_HAS_STRUCT_PAGE 0x1
+#define I915_GEM_OBJECT_IS_SHRINKABLE 0x2
+
+ /* Interface between the GEM object and its backing storage.
+ * get_pages() is called once prior to the use of the associated set
+ * of pages before to binding them into the GTT, and put_pages() is
+ * called after we no longer need them. As we expect there to be
+ * associated cost with migrating pages between the backing storage
+ * and making them available for the GPU (e.g. clflush), we may hold
+ * onto the pages after they are no longer referenced by the GPU
+ * in case they may be used again shortly (for example migrating the
+ * pages to a different memory domain within the GTT). put_pages()
+ * will therefore most likely be called when the object itself is
+ * being released or under memory pressure (where we attempt to
+ * reap pages for the shrinker).
+ */
+ struct sg_table *(*get_pages)(struct drm_i915_gem_object *);
+ void (*put_pages)(struct drm_i915_gem_object *, struct sg_table *);
+
+ int (*dmabuf_export)(struct drm_i915_gem_object *);
+ void (*release)(struct drm_i915_gem_object *);
+};
+
+struct drm_i915_gem_object {
+ struct drm_gem_object base;
+
+ const struct drm_i915_gem_object_ops *ops;
+
+ /** List of VMAs backed by this object */
+ struct list_head vma_list;
+ struct rb_root vma_tree;
+
+ /** Stolen memory for this object, instead of being backed by shmem. */
+ struct drm_mm_node *stolen;
+ struct list_head global_list;
+ union {
+ struct rcu_head rcu;
+ struct llist_node freed;
+ };
+
+ /**
+ * Whether the object is currently in the GGTT mmap.
+ */
+ struct list_head userfault_link;
+
+ /** Used in execbuf to temporarily hold a ref */
+ struct list_head obj_exec_link;
+
+ struct list_head batch_pool_link;
+
+ unsigned long flags;
+
+ /**
+ * Have we taken a reference for the object for incomplete GPU
+ * activity?
+ */
+#define I915_BO_ACTIVE_REF 0
+
+ /*
+ * Is the object to be mapped as read-only to the GPU
+ * Only honoured if hardware has relevant pte bit
+ */
+ unsigned long gt_ro:1;
+ unsigned int cache_level:3;
+ unsigned int cache_dirty:1;
+
+ atomic_t frontbuffer_bits;
+ unsigned int frontbuffer_ggtt_origin; /* write once */
+
+ /** Current tiling stride for the object, if it's tiled. */
+ unsigned int tiling_and_stride;
+#define FENCE_MINIMUM_STRIDE 128 /* See i915_tiling_ok() */
+#define TILING_MASK (FENCE_MINIMUM_STRIDE-1)
+#define STRIDE_MASK (~TILING_MASK)
+
+ /** Count of VMA actually bound by this object */
+ unsigned int bind_count;
+ unsigned int active_count;
+ unsigned int pin_display;
+
+ struct {
+ struct mutex lock; /* protects the pages and their use */
+ atomic_t pages_pin_count;
+
+ struct sg_table *pages;
+ void *mapping;
+
+ struct i915_gem_object_page_iter {
+ struct scatterlist *sg_pos;
+ unsigned int sg_idx; /* in pages, but 32bit eek! */
+
+ struct radix_tree_root radix;
+ struct mutex lock; /* protects this cache */
+ } get_page;
+
+ /**
+ * Advice: are the backing pages purgeable?
+ */
+ unsigned int madv:2;
+
+ /**
+ * This is set if the object has been written to since the
+ * pages were last acquired.
+ */
+ bool dirty:1;
+
+ /**
+ * This is set if the object has been pinned due to unknown
+ * swizzling.
+ */
+ bool quirked:1;
+ } mm;
+
+ /** Breadcrumb of last rendering to the buffer.
+ * There can only be one writer, but we allow for multiple readers.
+ * If there is a writer that necessarily implies that all other
+ * read requests are complete - but we may only be lazily clearing
+ * the read requests. A read request is naturally the most recent
+ * request on a ring, so we may have two different write and read
+ * requests on one ring where the write request is older than the
+ * read request. This allows for the CPU to read from an active
+ * buffer by only waiting for the write to complete.
+ */
+ struct reservation_object *resv;
+
+ /** References from framebuffers, locks out tiling changes. */
+ unsigned long framebuffer_references;
+
+ /** Record of address bit 17 of each page at last unbind. */
+ unsigned long *bit_17;
+
+ struct i915_gem_userptr {
+ uintptr_t ptr;
+ unsigned read_only :1;
+
+ struct i915_mm_struct *mm;
+ struct i915_mmu_object *mmu_object;
+ struct work_struct *work;
+ } userptr;
+
+ /** for phys allocated objects */
+ struct drm_dma_handle *phys_handle;
+
+ struct reservation_object __builtin_resv;
+};
+
+static inline struct drm_i915_gem_object *
+to_intel_bo(struct drm_gem_object *gem)
+{
+ /* Assert that to_intel_bo(NULL) == NULL */
+ BUILD_BUG_ON(offsetof(struct drm_i915_gem_object, base));
+
+ return container_of(gem, struct drm_i915_gem_object, base);
+}
+
+/**
+ * i915_gem_object_lookup_rcu - look up a temporary GEM object from its handle
+ * @filp: DRM file private date
+ * @handle: userspace handle
+ *
+ * Returns:
+ *
+ * A pointer to the object named by the handle if such exists on @filp, NULL
+ * otherwise. This object is only valid whilst under the RCU read lock, and
+ * note carefully the object may be in the process of being destroyed.
+ */
+static inline struct drm_i915_gem_object *
+i915_gem_object_lookup_rcu(struct drm_file *file, u32 handle)
+{
+#ifdef CONFIG_LOCKDEP
+ WARN_ON(debug_locks && !lock_is_held(&rcu_lock_map));
+#endif
+ return idr_find(&file->object_idr, handle);
+}
+
+static inline struct drm_i915_gem_object *
+i915_gem_object_lookup(struct drm_file *file, u32 handle)
+{
+ struct drm_i915_gem_object *obj;
+
+ rcu_read_lock();
+ obj = i915_gem_object_lookup_rcu(file, handle);
+ if (obj && !kref_get_unless_zero(&obj->base.refcount))
+ obj = NULL;
+ rcu_read_unlock();
+
+ return obj;
+}
+
+__deprecated
+extern struct drm_gem_object *
+drm_gem_object_lookup(struct drm_file *file, u32 handle);
+
+__attribute__((nonnull))
+static inline struct drm_i915_gem_object *
+i915_gem_object_get(struct drm_i915_gem_object *obj)
+{
+ drm_gem_object_reference(&obj->base);
+ return obj;
+}
+
+__deprecated
+extern void drm_gem_object_reference(struct drm_gem_object *);
+
+__attribute__((nonnull))
+static inline void
+i915_gem_object_put(struct drm_i915_gem_object *obj)
+{
+ __drm_gem_object_unreference(&obj->base);
+}
+
+__deprecated
+extern void drm_gem_object_unreference(struct drm_gem_object *);
+
+__deprecated
+extern void drm_gem_object_unreference_unlocked(struct drm_gem_object *);
+
+static inline bool
+i915_gem_object_is_dead(const struct drm_i915_gem_object *obj)
+{
+ return atomic_read(&obj->base.refcount.refcount) == 0;
+}
+
+static inline bool
+i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
+{
+ return obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE;
+}
+
+static inline bool
+i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj)
+{
+ return obj->ops->flags & I915_GEM_OBJECT_IS_SHRINKABLE;
+}
+
+static inline bool
+i915_gem_object_is_active(const struct drm_i915_gem_object *obj)
+{
+ return obj->active_count;
+}
+
+static inline bool
+i915_gem_object_has_active_reference(const struct drm_i915_gem_object *obj)
+{
+ return test_bit(I915_BO_ACTIVE_REF, &obj->flags);
+}
+
+static inline void
+i915_gem_object_set_active_reference(struct drm_i915_gem_object *obj)
+{
+ lockdep_assert_held(&obj->base.dev->struct_mutex);
+ __set_bit(I915_BO_ACTIVE_REF, &obj->flags);
+}
+
+static inline void
+i915_gem_object_clear_active_reference(struct drm_i915_gem_object *obj)
+{
+ lockdep_assert_held(&obj->base.dev->struct_mutex);
+ __clear_bit(I915_BO_ACTIVE_REF, &obj->flags);
+}
+
+void __i915_gem_object_release_unless_active(struct drm_i915_gem_object *obj);
+
+static inline unsigned int
+i915_gem_object_get_tiling(struct drm_i915_gem_object *obj)
+{
+ return obj->tiling_and_stride & TILING_MASK;
+}
+
+static inline bool
+i915_gem_object_is_tiled(struct drm_i915_gem_object *obj)
+{
+ return i915_gem_object_get_tiling(obj) != I915_TILING_NONE;
+}
+
+static inline unsigned int
+i915_gem_object_get_stride(struct drm_i915_gem_object *obj)
+{
+ return obj->tiling_and_stride & STRIDE_MASK;
+}
+
+static inline struct intel_engine_cs *
+i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
+{
+ struct intel_engine_cs *engine = NULL;
+ struct dma_fence *fence;
+
+ rcu_read_lock();
+ fence = reservation_object_get_excl_rcu(obj->resv);
+ rcu_read_unlock();
+
+ if (fence && dma_fence_is_i915(fence) && !dma_fence_is_signaled(fence))
+ engine = to_request(fence)->engine;
+ dma_fence_put(fence);
+
+ return engine;
+}
+
+#endif
+
diff --git a/drivers/gpu/drm/i915/i915_gem_request.h b/drivers/gpu/drm/i915/i915_gem_request.h
index 75f8360..b0b59b3 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.h
+++ b/drivers/gpu/drm/i915/i915_gem_request.h
@@ -30,6 +30,9 @@
#include "i915_gem.h"
#include "i915_sw_fence.h"
+struct drm_file;
+struct drm_i915_gem_object;
+
struct intel_wait {
struct rb_node node;
struct task_struct *tsk;
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
new file mode 100644
index 0000000..a5b84dd
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -0,0 +1,648 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "i915_vma.h"
+
+#include "i915_drv.h"
+#include "intel_ringbuffer.h"
+#include "intel_frontbuffer.h"
+
+#include <drm/drm_gem.h>
+
+static void
+i915_vma_retire(struct i915_gem_active *active,
+ struct drm_i915_gem_request *rq)
+{
+ const unsigned int idx = rq->engine->id;
+ struct i915_vma *vma =
+ container_of(active, struct i915_vma, last_read[idx]);
+ struct drm_i915_gem_object *obj = vma->obj;
+
+ GEM_BUG_ON(!i915_vma_has_active_engine(vma, idx));
+
+ i915_vma_clear_active(vma, idx);
+ if (i915_vma_is_active(vma))
+ return;
+
+ list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
+ if (unlikely(i915_vma_is_closed(vma) && !i915_vma_is_pinned(vma)))
+ WARN_ON(i915_vma_unbind(vma));
+
+ GEM_BUG_ON(!i915_gem_object_is_active(obj));
+ if (--obj->active_count)
+ return;
+
+ /* Bump our place on the bound list to keep it roughly in LRU order
+ * so that we don't steal from recently used but inactive objects
+ * (unless we are forced to ofc!)
+ */
+ if (obj->bind_count)
+ list_move_tail(&obj->global_list, &rq->i915->mm.bound_list);
+
+ obj->mm.dirty = true; /* be paranoid */
+
+ if (i915_gem_object_has_active_reference(obj)) {
+ i915_gem_object_clear_active_reference(obj);
+ i915_gem_object_put(obj);
+ }
+}
+
+static void
+i915_ggtt_retire__write(struct i915_gem_active *active,
+ struct drm_i915_gem_request *request)
+{
+ struct i915_vma *vma =
+ container_of(active, struct i915_vma, last_write);
+
+ intel_fb_obj_flush(vma->obj, true, ORIGIN_CS);
+}
+
+static struct i915_vma *
+__i915_vma_create(struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view)
+{
+ struct i915_vma *vma;
+ struct rb_node *rb, **p;
+ int i;
+
+ GEM_BUG_ON(vm->closed);
+
+ vma = kmem_cache_zalloc(to_i915(obj->base.dev)->vmas, GFP_KERNEL);
+ if (vma == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&vma->exec_list);
+ for (i = 0; i < ARRAY_SIZE(vma->last_read); i++)
+ init_request_active(&vma->last_read[i], i915_vma_retire);
+ init_request_active(&vma->last_write,
+ i915_is_ggtt(vm) ? i915_ggtt_retire__write : NULL);
+ init_request_active(&vma->last_fence, NULL);
+ list_add(&vma->vm_link, &vm->unbound_list);
+ vma->vm = vm;
+ vma->obj = obj;
+ vma->size = obj->base.size;
+
+ if (view) {
+ vma->ggtt_view = *view;
+ if (view->type == I915_GGTT_VIEW_PARTIAL) {
+ vma->size = view->params.partial.size;
+ vma->size <<= PAGE_SHIFT;
+ } else if (view->type == I915_GGTT_VIEW_ROTATED) {
+ vma->size =
+ intel_rotation_info_size(&view->params.rotated);
+ vma->size <<= PAGE_SHIFT;
+ }
+ }
+
+ if (i915_is_ggtt(vm)) {
+ vma->flags |= I915_VMA_GGTT;
+ list_add(&vma->obj_link, &obj->vma_list);
+ } else {
+ i915_ppgtt_get(i915_vm_to_ppgtt(vm));
+ list_add_tail(&vma->obj_link, &obj->vma_list);
+ }
+
+ rb = NULL;
+ p = &obj->vma_tree.rb_node;
+ while (*p) {
+ struct i915_vma *pos;
+
+ rb = *p;
+ pos = rb_entry(rb, struct i915_vma, obj_node);
+ if (i915_vma_compare(pos, vm, view) < 0)
+ p = &rb->rb_right;
+ else
+ p = &rb->rb_left;
+ }
+ rb_link_node(&vma->obj_node, rb, p);
+ rb_insert_color(&vma->obj_node, &obj->vma_tree);
+
+ return vma;
+}
+
+struct i915_vma *
+i915_vma_create(struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view)
+{
+ lockdep_assert_held(&obj->base.dev->struct_mutex);
+ GEM_BUG_ON(view && !i915_is_ggtt(vm));
+ GEM_BUG_ON(i915_gem_obj_to_vma(obj, vm, view));
+
+ return __i915_vma_create(obj, vm, view);
+}
+
+/**
+ * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.
+ * @vma: VMA to map
+ * @cache_level: mapping cache level
+ * @flags: flags like global or local mapping
+ *
+ * DMA addresses are taken from the scatter-gather table of this object (or of
+ * this VMA in case of non-default GGTT views) and PTE entries set up.
+ * Note that DMA addresses are also the only part of the SG table we care about.
+ */
+int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
+ u32 flags)
+{
+ u32 bind_flags;
+ u32 vma_flags;
+ int ret;
+
+ if (WARN_ON(flags == 0))
+ return -EINVAL;
+
+ bind_flags = 0;
+ if (flags & PIN_GLOBAL)
+ bind_flags |= I915_VMA_GLOBAL_BIND;
+ if (flags & PIN_USER)
+ bind_flags |= I915_VMA_LOCAL_BIND;
+
+ vma_flags = vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
+ if (flags & PIN_UPDATE)
+ bind_flags |= vma_flags;
+ else
+ bind_flags &= ~vma_flags;
+ if (bind_flags == 0)
+ return 0;
+
+ if (vma_flags == 0 && vma->vm->allocate_va_range) {
+ trace_i915_va_alloc(vma);
+ ret = vma->vm->allocate_va_range(vma->vm,
+ vma->node.start,
+ vma->node.size);
+ if (ret)
+ return ret;
+ }
+
+ ret = vma->vm->bind_vma(vma, cache_level, bind_flags);
+ if (ret)
+ return ret;
+
+ vma->flags |= bind_flags;
+ return 0;
+}
+
+void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
+{
+ void __iomem *ptr;
+
+ /* Access through the GTT requires the device to be awake. */
+ assert_rpm_wakelock_held(to_i915(vma->vm->dev));
+
+ lockdep_assert_held(&vma->vm->dev->struct_mutex);
+ if (WARN_ON(!i915_vma_is_map_and_fenceable(vma)))
+ return IO_ERR_PTR(-ENODEV);
+
+ GEM_BUG_ON(!i915_vma_is_ggtt(vma));
+ GEM_BUG_ON((vma->flags & I915_VMA_GLOBAL_BIND) == 0);
+
+ ptr = vma->iomap;
+ if (ptr == NULL) {
+ ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->mappable,
+ vma->node.start,
+ vma->node.size);
+ if (ptr == NULL)
+ return IO_ERR_PTR(-ENOMEM);
+
+ vma->iomap = ptr;
+ }
+
+ __i915_vma_pin(vma);
+ return ptr;
+}
+
+void i915_vma_unpin_and_release(struct i915_vma **p_vma)
+{
+ struct i915_vma *vma;
+ struct drm_i915_gem_object *obj;
+
+ vma = fetch_and_zero(p_vma);
+ if (!vma)
+ return;
+
+ obj = vma->obj;
+
+ i915_vma_unpin(vma);
+ i915_vma_close(vma);
+
+ __i915_gem_object_release_unless_active(obj);
+}
+
+bool
+i915_vma_misplaced(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
+{
+ if (!drm_mm_node_allocated(&vma->node))
+ return false;
+
+ if (vma->node.size < size)
+ return true;
+
+ if (alignment && vma->node.start & (alignment - 1))
+ return true;
+
+ if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma))
+ return true;
+
+ if (flags & PIN_OFFSET_BIAS &&
+ vma->node.start < (flags & PIN_OFFSET_MASK))
+ return true;
+
+ if (flags & PIN_OFFSET_FIXED &&
+ vma->node.start != (flags & PIN_OFFSET_MASK))
+ return true;
+
+ return false;
+}
+
+void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
+{
+ struct drm_i915_gem_object *obj = vma->obj;
+ struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
+ bool mappable, fenceable;
+ u32 fence_size, fence_alignment;
+
+ fence_size = i915_gem_get_ggtt_size(dev_priv,
+ vma->size,
+ i915_gem_object_get_tiling(obj));
+ fence_alignment = i915_gem_get_ggtt_alignment(dev_priv,
+ vma->size,
+ i915_gem_object_get_tiling(obj),
+ true);
+
+ fenceable = (vma->node.size == fence_size &&
+ (vma->node.start & (fence_alignment - 1)) == 0);
+
+ mappable = (vma->node.start + fence_size <=
+ dev_priv->ggtt.mappable_end);
+
+ /*
+ * Explicitly disable for rotated VMA since the display does not
+ * need the fence and the VMA is not accessible to other users.
+ */
+ if (mappable && fenceable &&
+ vma->ggtt_view.type != I915_GGTT_VIEW_ROTATED)
+ vma->flags |= I915_VMA_CAN_FENCE;
+ else
+ vma->flags &= ~I915_VMA_CAN_FENCE;
+}
+
+bool i915_gem_valid_gtt_space(struct i915_vma *vma,
+ unsigned long cache_level)
+{
+ struct drm_mm_node *gtt_space = &vma->node;
+ struct drm_mm_node *other;
+
+ /*
+ * On some machines we have to be careful when putting differing types
+ * of snoopable memory together to avoid the prefetcher crossing memory
+ * domains and dying. During vm initialisation, we decide whether or not
+ * these constraints apply and set the drm_mm.color_adjust
+ * appropriately.
+ */
+ if (vma->vm->mm.color_adjust == NULL)
+ return true;
+
+ if (!drm_mm_node_allocated(gtt_space))
+ return true;
+
+ if (list_empty(>t_space->node_list))
+ return true;
+
+ other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
+ if (other->allocated && !other->hole_follows && other->color != cache_level)
+ return false;
+
+ other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
+ if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
+ return false;
+
+ return true;
+}
+
+/**
+ * i915_vma_insert - finds a slot for the vma in its address space
+ * @vma: the vma
+ * @size: requested size in bytes (can be larger than the VMA)
+ * @alignment: required alignment
+ * @flags: mask of PIN_* flags to use
+ *
+ * First we try to allocate some free space that meets the requirements for
+ * the VMA. Failiing that, if the flags permit, it will evict an old VMA,
+ * preferrably the oldest idle entry to make room for the new VMA.
+ *
+ * Returns:
+ * 0 on success, negative error code otherwise.
+ */
+static int
+i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
+{
+ struct drm_i915_private *dev_priv = to_i915(vma->vm->dev);
+ struct drm_i915_gem_object *obj = vma->obj;
+ u64 start, end;
+ int ret;
+
+ GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
+ GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
+
+ size = max(size, vma->size);
+ if (flags & PIN_MAPPABLE)
+ size = i915_gem_get_ggtt_size(dev_priv, size,
+ i915_gem_object_get_tiling(obj));
+
+ alignment = max(max(alignment, vma->display_alignment),
+ i915_gem_get_ggtt_alignment(dev_priv, size,
+ i915_gem_object_get_tiling(obj),
+ flags & PIN_MAPPABLE));
+
+ start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
+
+ end = vma->vm->total;
+ if (flags & PIN_MAPPABLE)
+ end = min_t(u64, end, dev_priv->ggtt.mappable_end);
+ if (flags & PIN_ZONE_4G)
+ end = min_t(u64, end, (1ULL << 32) - PAGE_SIZE);
+
+ /* If binding the object/GGTT view requires more space than the entire
+ * aperture has, reject it early before evicting everything in a vain
+ * attempt to find space.
+ */
+ if (size > end) {
+ DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu [object=%zd] > %s aperture=%llu\n",
+ size, obj->base.size,
+ flags & PIN_MAPPABLE ? "mappable" : "total",
+ end);
+ return -E2BIG;
+ }
+
+ ret = i915_gem_object_pin_pages(obj);
+ if (ret)
+ return ret;
+
+ if (flags & PIN_OFFSET_FIXED) {
+ u64 offset = flags & PIN_OFFSET_MASK;
+ if (offset & (alignment - 1) || offset > end - size) {
+ ret = -EINVAL;
+ goto err_unpin;
+ }
+
+ vma->node.start = offset;
+ vma->node.size = size;
+ vma->node.color = obj->cache_level;
+ ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
+ if (ret) {
+ ret = i915_gem_evict_for_vma(vma);
+ if (ret == 0)
+ ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
+ if (ret)
+ goto err_unpin;
+ }
+ } else {
+ u32 search_flag, alloc_flag;
+
+ if (flags & PIN_HIGH) {
+ search_flag = DRM_MM_SEARCH_BELOW;
+ alloc_flag = DRM_MM_CREATE_TOP;
+ } else {
+ search_flag = DRM_MM_SEARCH_DEFAULT;
+ alloc_flag = DRM_MM_CREATE_DEFAULT;
+ }
+
+ /* We only allocate in PAGE_SIZE/GTT_PAGE_SIZE (4096) chunks,
+ * so we know that we always have a minimum alignment of 4096.
+ * The drm_mm range manager is optimised to return results
+ * with zero alignment, so where possible use the optimal
+ * path.
+ */
+ if (alignment <= 4096)
+ alignment = 0;
+
+search_free:
+ ret = drm_mm_insert_node_in_range_generic(&vma->vm->mm,
+ &vma->node,
+ size, alignment,
+ obj->cache_level,
+ start, end,
+ search_flag,
+ alloc_flag);
+ if (ret) {
+ ret = i915_gem_evict_something(vma->vm, size, alignment,
+ obj->cache_level,
+ start, end,
+ flags);
+ if (ret == 0)
+ goto search_free;
+
+ goto err_unpin;
+ }
+
+ GEM_BUG_ON(vma->node.start < start);
+ GEM_BUG_ON(vma->node.start + vma->node.size > end);
+ }
+ GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level));
+
+ list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
+ list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
+ obj->bind_count++;
+
+ return 0;
+
+err_unpin:
+ i915_gem_object_unpin_pages(obj);
+ return ret;
+}
+
+int __i915_vma_do_pin(struct i915_vma *vma,
+ u64 size, u64 alignment, u64 flags)
+{
+ unsigned int bound = vma->flags;
+ int ret;
+
+ lockdep_assert_held(&vma->vm->dev->struct_mutex);
+ GEM_BUG_ON((flags & (PIN_GLOBAL | PIN_USER)) == 0);
+ GEM_BUG_ON((flags & PIN_GLOBAL) && !i915_vma_is_ggtt(vma));
+
+ if (WARN_ON(bound & I915_VMA_PIN_OVERFLOW)) {
+ ret = -EBUSY;
+ goto err;
+ }
+
+ if ((bound & I915_VMA_BIND_MASK) == 0) {
+ ret = i915_vma_insert(vma, size, alignment, flags);
+ if (ret)
+ goto err;
+ }
+
+ ret = i915_vma_bind(vma, vma->obj->cache_level, flags);
+ if (ret)
+ goto err;
+
+ if ((bound ^ vma->flags) & I915_VMA_GLOBAL_BIND)
+ __i915_vma_set_map_and_fenceable(vma);
+
+ GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
+ return 0;
+
+err:
+ __i915_vma_unpin(vma);
+ return ret;
+}
+
+void i915_vma_destroy(struct i915_vma *vma)
+{
+ GEM_BUG_ON(vma->node.allocated);
+ GEM_BUG_ON(i915_vma_is_active(vma));
+ GEM_BUG_ON(!i915_vma_is_closed(vma));
+ GEM_BUG_ON(vma->fence);
+
+ rb_erase(&vma->obj_node, &vma->obj->vma_tree);
+ list_del(&vma->vm_link);
+ if (!i915_vma_is_ggtt(vma))
+ i915_ppgtt_put(i915_vm_to_ppgtt(vma->vm));
+
+ kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma);
+}
+
+void i915_vma_close(struct i915_vma *vma)
+{
+ GEM_BUG_ON(i915_vma_is_closed(vma));
+ vma->flags |= I915_VMA_CLOSED;
+
+ list_del_init(&vma->obj_link);
+ if (!i915_vma_is_active(vma) && !i915_vma_is_pinned(vma))
+ WARN_ON(i915_vma_unbind(vma));
+}
+
+static void __i915_vma_iounmap(struct i915_vma *vma)
+{
+ GEM_BUG_ON(i915_vma_is_pinned(vma));
+
+ if (vma->iomap == NULL)
+ return;
+
+ io_mapping_unmap(vma->iomap);
+ vma->iomap = NULL;
+}
+
+int i915_vma_unbind(struct i915_vma *vma)
+{
+ struct drm_i915_gem_object *obj = vma->obj;
+ unsigned long active;
+ int ret;
+
+ lockdep_assert_held(&obj->base.dev->struct_mutex);
+
+ /* First wait upon any activity as retiring the request may
+ * have side-effects such as unpinning or even unbinding this vma.
+ */
+ active = i915_vma_get_active(vma);
+ if (active) {
+ int idx;
+
+ /* When a closed VMA is retired, it is unbound - eek.
+ * In order to prevent it from being recursively closed,
+ * take a pin on the vma so that the second unbind is
+ * aborted.
+ *
+ * Even more scary is that the retire callback may free
+ * the object (last active vma). To prevent the explosion
+ * we defer the actual object free to a worker that can
+ * only proceed once it acquires the struct_mutex (which
+ * we currently hold, therefore it cannot free this object
+ * before we are finished).
+ */
+ __i915_vma_pin(vma);
+
+ for_each_active(active, idx) {
+ ret = i915_gem_active_retire(&vma->last_read[idx],
+ &vma->vm->dev->struct_mutex);
+ if (ret)
+ break;
+ }
+
+ __i915_vma_unpin(vma);
+ if (ret)
+ return ret;
+
+ GEM_BUG_ON(i915_vma_is_active(vma));
+ }
+
+ if (i915_vma_is_pinned(vma))
+ return -EBUSY;
+
+ if (!drm_mm_node_allocated(&vma->node))
+ goto destroy;
+
+ GEM_BUG_ON(obj->bind_count == 0);
+ GEM_BUG_ON(!obj->mm.pages);
+
+ if (i915_vma_is_map_and_fenceable(vma)) {
+ /* release the fence reg _after_ flushing */
+ ret = i915_vma_put_fence(vma);
+ if (ret)
+ return ret;
+
+ /* Force a pagefault for domain tracking on next user access */
+ i915_gem_release_mmap(obj);
+
+ __i915_vma_iounmap(vma);
+ vma->flags &= ~I915_VMA_CAN_FENCE;
+ }
+
+ if (likely(!vma->vm->closed)) {
+ trace_i915_vma_unbind(vma);
+ vma->vm->unbind_vma(vma);
+ }
+ vma->flags &= ~(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
+
+ drm_mm_remove_node(&vma->node);
+ list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
+
+ if (vma->pages != obj->mm.pages) {
+ GEM_BUG_ON(!vma->pages);
+ sg_free_table(vma->pages);
+ kfree(vma->pages);
+ }
+ vma->pages = NULL;
+
+ /* Since the unbound list is global, only move to that list if
+ * no more VMAs exist. */
+ if (--obj->bind_count == 0)
+ list_move_tail(&obj->global_list,
+ &to_i915(obj->base.dev)->mm.unbound_list);
+
+ /* And finally now the object is completely decoupled from this vma,
+ * we can drop its hold on the backing storage and allow it to be
+ * reaped by the shrinker.
+ */
+ i915_gem_object_unpin_pages(obj);
+
+destroy:
+ if (unlikely(i915_vma_is_closed(vma)))
+ i915_vma_destroy(vma);
+
+ return 0;
+}
+
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
new file mode 100644
index 0000000..eaa7820
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -0,0 +1,342 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __I915_VMA_H__
+#define __I915_VMA_H__
+
+#include <linux/io-mapping.h>
+
+#include <drm/drm_mm.h>
+
+#include "i915_gem_gtt.h"
+#include "i915_gem_object.h"
+#include "i915_gem_request.h"
+
+#include "i915_fence_reg.h"
+
+enum i915_cache_level;
+
+/**
+ * A VMA represents a GEM BO that is bound into an address space. Therefore, a
+ * VMA's presence cannot be guaranteed before binding, or after unbinding the
+ * object into/from the address space.
+ *
+ * To make things as simple as possible (ie. no refcounting), a VMA's lifetime
+ * will always be <= an objects lifetime. So object refcounting should cover us.
+ */
+struct i915_vma {
+ struct drm_mm_node node;
+ struct drm_i915_gem_object *obj;
+ struct i915_address_space *vm;
+ struct drm_i915_fence_reg *fence;
+ struct sg_table *pages;
+ void __iomem *iomap;
+ u64 size;
+ u64 display_alignment;
+
+ unsigned int flags;
+ /**
+ * How many users have pinned this object in GTT space. The following
+ * users can each hold at most one reference: pwrite/pread, execbuffer
+ * (objects are not allowed multiple times for the same batchbuffer),
+ * and the framebuffer code. When switching/pageflipping, the
+ * framebuffer code has at most two buffers pinned per crtc.
+ *
+ * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
+ * bits with absolutely no headroom. So use 4 bits.
+ */
+#define I915_VMA_PIN_MASK 0xf
+#define I915_VMA_PIN_OVERFLOW BIT(5)
+
+ /** Flags and address space this VMA is bound to */
+#define I915_VMA_GLOBAL_BIND BIT(6)
+#define I915_VMA_LOCAL_BIND BIT(7)
+#define I915_VMA_BIND_MASK (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND | I915_VMA_PIN_OVERFLOW)
+
+#define I915_VMA_GGTT BIT(8)
+#define I915_VMA_CAN_FENCE BIT(9)
+#define I915_VMA_CLOSED BIT(10)
+
+ unsigned int active;
+ struct i915_gem_active last_read[I915_NUM_ENGINES];
+ struct i915_gem_active last_write;
+ struct i915_gem_active last_fence;
+
+ /**
+ * Support different GGTT views into the same object.
+ * This means there can be multiple VMA mappings per object and per VM.
+ * i915_ggtt_view_type is used to distinguish between those entries.
+ * The default one of zero (I915_GGTT_VIEW_NORMAL) is default and also
+ * assumed in GEM functions which take no ggtt view parameter.
+ */
+ struct i915_ggtt_view ggtt_view;
+
+ /** This object's place on the active/inactive lists */
+ struct list_head vm_link;
+
+ struct list_head obj_link; /* Link in the object's VMA list */
+ struct rb_node obj_node;
+
+ /** This vma's place in the batchbuffer or on the eviction list */
+ struct list_head exec_list;
+
+ /**
+ * Used for performing relocations during execbuffer insertion.
+ */
+ struct hlist_node exec_node;
+ unsigned long exec_handle;
+ struct drm_i915_gem_exec_object2 *exec_entry;
+};
+
+struct i915_vma *
+i915_vma_create(struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view);
+
+static inline long
+i915_vma_compare(struct i915_vma *vma,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view)
+{
+ GEM_BUG_ON(view && !i915_vma_is_ggtt(vma));
+
+ if (vma->vm != vm)
+ return vma->vm - vm;
+
+ if (!view)
+ return vma->ggtt_view.type;
+
+ if (vma->ggtt_view.type != view->type)
+ return vma->ggtt_view.type - view->type;
+
+ return memcmp(&vma->ggtt_view.params,
+ &view->params,
+ sizeof(view->params));
+}
+
+void i915_vma_unpin_and_release(struct i915_vma **p_vma);
+
+static inline bool i915_vma_is_ggtt(const struct i915_vma *vma)
+{
+ return vma->flags & I915_VMA_GGTT;
+}
+
+static inline bool i915_vma_is_map_and_fenceable(const struct i915_vma *vma)
+{
+ return vma->flags & I915_VMA_CAN_FENCE;
+}
+
+static inline bool i915_vma_is_closed(const struct i915_vma *vma)
+{
+ return vma->flags & I915_VMA_CLOSED;
+}
+
+static inline unsigned int i915_vma_get_active(const struct i915_vma *vma)
+{
+ return vma->active;
+}
+
+static inline bool i915_vma_is_active(const struct i915_vma *vma)
+{
+ return i915_vma_get_active(vma);
+}
+
+static inline void i915_vma_set_active(struct i915_vma *vma,
+ unsigned int engine)
+{
+ vma->active |= BIT(engine);
+}
+
+static inline void i915_vma_clear_active(struct i915_vma *vma,
+ unsigned int engine)
+{
+ vma->active &= ~BIT(engine);
+}
+
+static inline bool i915_vma_has_active_engine(const struct i915_vma *vma,
+ unsigned int engine)
+{
+ return vma->active & BIT(engine);
+}
+
+static inline u32 i915_ggtt_offset(const struct i915_vma *vma)
+{
+ GEM_BUG_ON(!i915_vma_is_ggtt(vma));
+ GEM_BUG_ON(!vma->node.allocated);
+ GEM_BUG_ON(upper_32_bits(vma->node.start));
+ GEM_BUG_ON(upper_32_bits(vma->node.start + vma->node.size - 1));
+ return lower_32_bits(vma->node.start);
+}
+
+static inline struct i915_vma *i915_vma_get(struct i915_vma *vma)
+{
+ i915_gem_object_get(vma->obj);
+ return vma;
+}
+
+static inline void i915_vma_put(struct i915_vma *vma)
+{
+ i915_gem_object_put(vma->obj);
+}
+
+int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
+ u32 flags);
+bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level);
+bool
+i915_vma_misplaced(struct i915_vma *vma, u64 size, u64 alignment, u64 flags);
+void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
+int __must_check i915_vma_unbind(struct i915_vma *vma);
+void i915_vma_close(struct i915_vma *vma);
+void i915_vma_destroy(struct i915_vma *vma);
+
+int __i915_vma_do_pin(struct i915_vma *vma,
+ u64 size, u64 alignment, u64 flags);
+static inline int __must_check
+i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
+{
+ BUILD_BUG_ON(PIN_MBZ != I915_VMA_PIN_OVERFLOW);
+ BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND);
+ BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND);
+
+ /* Pin early to prevent the shrinker/eviction logic from destroying
+ * our vma as we insert and bind.
+ */
+ if (likely(((++vma->flags ^ flags) & I915_VMA_BIND_MASK) == 0))
+ return 0;
+
+ return __i915_vma_do_pin(vma, size, alignment, flags);
+}
+
+static inline int i915_vma_pin_count(const struct i915_vma *vma)
+{
+ return vma->flags & I915_VMA_PIN_MASK;
+}
+
+static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
+{
+ return i915_vma_pin_count(vma);
+}
+
+static inline void __i915_vma_pin(struct i915_vma *vma)
+{
+ vma->flags++;
+ GEM_BUG_ON(vma->flags & I915_VMA_PIN_OVERFLOW);
+}
+
+static inline void __i915_vma_unpin(struct i915_vma *vma)
+{
+ GEM_BUG_ON(!i915_vma_is_pinned(vma));
+ vma->flags--;
+}
+
+static inline void i915_vma_unpin(struct i915_vma *vma)
+{
+ GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
+ __i915_vma_unpin(vma);
+}
+
+/**
+ * i915_vma_pin_iomap - calls ioremap_wc to map the GGTT VMA via the aperture
+ * @vma: VMA to iomap
+ *
+ * The passed in VMA has to be pinned in the global GTT mappable region.
+ * An extra pinning of the VMA is acquired for the return iomapping,
+ * the caller must call i915_vma_unpin_iomap to relinquish the pinning
+ * after the iomapping is no longer required.
+ *
+ * Callers must hold the struct_mutex.
+ *
+ * Returns a valid iomapped pointer or ERR_PTR.
+ */
+void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
+#define IO_ERR_PTR(x) ((void __iomem *)ERR_PTR(x))
+
+/**
+ * i915_vma_unpin_iomap - unpins the mapping returned from i915_vma_iomap
+ * @vma: VMA to unpin
+ *
+ * Unpins the previously iomapped VMA from i915_vma_pin_iomap().
+ *
+ * Callers must hold the struct_mutex. This function is only valid to be
+ * called on a VMA previously iomapped by the caller with i915_vma_pin_iomap().
+ */
+static inline void i915_vma_unpin_iomap(struct i915_vma *vma)
+{
+ lockdep_assert_held(&vma->vm->dev->struct_mutex);
+ GEM_BUG_ON(vma->iomap == NULL);
+ i915_vma_unpin(vma);
+}
+
+static inline struct page *i915_vma_first_page(struct i915_vma *vma)
+{
+ GEM_BUG_ON(!vma->pages);
+ return sg_page(vma->pages->sgl);
+}
+
+/**
+ * i915_vma_pin_fence - pin fencing state
+ * @vma: vma to pin fencing for
+ *
+ * This pins the fencing state (whether tiled or untiled) to make sure the
+ * vma (and its object) is ready to be used as a scanout target. Fencing
+ * status must be synchronize first by calling i915_vma_get_fence():
+ *
+ * The resulting fence pin reference must be released again with
+ * i915_vma_unpin_fence().
+ *
+ * Returns:
+ *
+ * True if the vma has a fence, false otherwise.
+ */
+static inline bool
+i915_vma_pin_fence(struct i915_vma *vma)
+{
+ lockdep_assert_held(&vma->vm->dev->struct_mutex);
+ if (vma->fence) {
+ vma->fence->pin_count++;
+ return true;
+ } else
+ return false;
+}
+
+/**
+ * i915_vma_unpin_fence - unpin fencing state
+ * @vma: vma to unpin fencing for
+ *
+ * This releases the fence pin reference acquired through
+ * i915_vma_pin_fence. It will handle both objects with and without an
+ * attached fence correctly, callers do not need to distinguish this.
+ */
+static inline void
+i915_vma_unpin_fence(struct i915_vma *vma)
+{
+ lockdep_assert_held(&vma->vm->dev->struct_mutex);
+ if (vma->fence) {
+ GEM_BUG_ON(vma->fence->pin_count <= 0);
+ vma->fence->pin_count--;
+ }
+}
+
+#endif
+
--
2.7.4
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