From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Things like reliable GGTT mappings and mirrored 3d display will need to be
to map the same object twice into the GGTT.
Add a ggtt_view field per VMA and select the page view based on the type
of the view.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +++
drivers/gpu/drm/i915/i915_gem.c | 9 ++++---
drivers/gpu/drm/i915/i915_gem_context.c | 2 +-
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 2 +-
drivers/gpu/drm/i915/i915_gem_gtt.c | 38 +++++++++++++++++++++++-------
drivers/gpu/drm/i915/i915_gem_gtt.h | 24 ++++++++++++++++++-
6 files changed, 63 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a830b85..92dec19 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2518,6 +2518,9 @@ int __must_check i915_gem_object_pin(struct drm_i915_gem_object *obj,
struct i915_address_space *vm,
uint32_t alignment,
uint64_t flags);
+
+void i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
+ u32 flags);
int __must_check i915_vma_unbind(struct i915_vma *vma);
int i915_gem_object_put_pages(struct drm_i915_gem_object *obj);
void i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 7f283d8..d7027f9 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3487,7 +3487,7 @@ search_free:
WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable);
trace_i915_vma_bind(vma, flags);
- vma->bind_vma(vma, obj->cache_level,
+ i915_vma_bind(vma, obj->cache_level,
flags & (PIN_MAPPABLE | PIN_GLOBAL) ? GLOBAL_BIND : 0);
return vma;
@@ -3695,7 +3695,7 @@ int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
list_for_each_entry(vma, &obj->vma_list, vma_link)
if (drm_mm_node_allocated(&vma->node))
- vma->bind_vma(vma, cache_level,
+ i915_vma_bind(vma, cache_level,
vma->bound & GLOBAL_BIND);
}
@@ -4093,7 +4093,7 @@ i915_gem_object_pin(struct drm_i915_gem_object *obj,
}
if (flags & PIN_GLOBAL && !(vma->bound & GLOBAL_BIND))
- vma->bind_vma(vma, obj->cache_level, GLOBAL_BIND);
+ i915_vma_bind(vma, obj->cache_level, GLOBAL_BIND);
vma->pin_count++;
if (flags & PIN_MAPPABLE)
@@ -4511,6 +4511,9 @@ void i915_gem_vma_destroy(struct i915_vma *vma)
list_del(&vma->vma_link);
+ if (vma->ggtt_view.put_pages)
+ vma->ggtt_view.put_pages(&vma->ggtt_view);
+
kfree(vma);
}
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 5ff6e94..d365348 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -577,7 +577,7 @@ static int do_switch(struct intel_engine_cs *ring,
vma = i915_gem_obj_to_ggtt(to->legacy_hw_ctx.rcs_state);
if (!(vma->bound & GLOBAL_BIND))
- vma->bind_vma(vma, to->legacy_hw_ctx.rcs_state->cache_level,
+ i915_vma_bind(vma, to->legacy_hw_ctx.rcs_state->cache_level,
GLOBAL_BIND);
if (!to->legacy_hw_ctx.initialized || i915_gem_context_is_default(to))
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 8d56d5b..5ba9440 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -358,7 +358,7 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
if (unlikely(IS_GEN6(dev) &&
reloc->write_domain == I915_GEM_DOMAIN_INSTRUCTION &&
!(target_vma->bound & GLOBAL_BIND)))
- target_vma->bind_vma(target_vma, target_i915_obj->cache_level,
+ i915_vma_bind(target_vma, target_i915_obj->cache_level,
GLOBAL_BIND);
/* Validate that the target is in a valid r/w GPU domain */
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index e4ee2ac..c0e7cd9 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -30,6 +30,8 @@
#include "i915_trace.h"
#include "intel_drv.h"
+const struct i915_ggtt_view i915_ggtt_view_normal;
+
static void bdw_setup_private_ppat(struct drm_i915_private *dev_priv);
static void chv_setup_private_ppat(struct drm_i915_private *dev_priv);
@@ -71,7 +73,7 @@ static int sanitize_enable_ppgtt(struct drm_device *dev, int enable_ppgtt)
}
-static void ppgtt_bind_vma(struct i915_vma *vma,
+static void ppgtt_bind_vma(struct i915_vma *vma, struct sg_table *pages,
enum i915_cache_level cache_level,
u32 flags);
static void ppgtt_unbind_vma(struct i915_vma *vma);
@@ -1194,7 +1196,7 @@ void i915_ppgtt_release(struct kref *kref)
}
static void
-ppgtt_bind_vma(struct i915_vma *vma,
+ppgtt_bind_vma(struct i915_vma *vma, struct sg_table *pages,
enum i915_cache_level cache_level,
u32 flags)
{
@@ -1202,7 +1204,7 @@ ppgtt_bind_vma(struct i915_vma *vma,
if (vma->obj->gt_ro)
flags |= PTE_READ_ONLY;
- vma->vm->insert_entries(vma->vm, vma->obj->pages, vma->node.start,
+ vma->vm->insert_entries(vma->vm, pages, vma->node.start,
cache_level, flags);
}
@@ -1325,7 +1327,7 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev)
* without telling our object about it. So we need to fake it.
*/
vma->bound &= ~GLOBAL_BIND;
- vma->bind_vma(vma, obj->cache_level, GLOBAL_BIND);
+ i915_vma_bind(vma, obj->cache_level, GLOBAL_BIND);
}
@@ -1511,7 +1513,7 @@ static void gen6_ggtt_clear_range(struct i915_address_space *vm,
}
-static void i915_ggtt_bind_vma(struct i915_vma *vma,
+static void i915_ggtt_bind_vma(struct i915_vma *vma, struct sg_table *pages,
enum i915_cache_level cache_level,
u32 unused)
{
@@ -1520,7 +1522,7 @@ static void i915_ggtt_bind_vma(struct i915_vma *vma,
AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
BUG_ON(!i915_is_ggtt(vma->vm));
- intel_gtt_insert_sg_entries(vma->obj->pages, entry, flags);
+ intel_gtt_insert_sg_entries(pages, entry, flags);
vma->bound = GLOBAL_BIND;
}
@@ -1544,7 +1546,7 @@ static void i915_ggtt_unbind_vma(struct i915_vma *vma)
intel_gtt_clear_range(first, size);
}
-static void ggtt_bind_vma(struct i915_vma *vma,
+static void ggtt_bind_vma(struct i915_vma *vma, struct sg_table *pages,
enum i915_cache_level cache_level,
u32 flags)
{
@@ -1570,7 +1572,7 @@ static void ggtt_bind_vma(struct i915_vma *vma,
if (!dev_priv->mm.aliasing_ppgtt || flags & GLOBAL_BIND) {
if (!(vma->bound & GLOBAL_BIND) ||
(cache_level != obj->cache_level)) {
- vma->vm->insert_entries(vma->vm, obj->pages,
+ vma->vm->insert_entries(vma->vm, pages,
vma->node.start,
cache_level, flags);
vma->bound |= GLOBAL_BIND;
@@ -1582,7 +1584,7 @@ static void ggtt_bind_vma(struct i915_vma *vma,
(cache_level != obj->cache_level))) {
struct i915_hw_ppgtt *appgtt = dev_priv->mm.aliasing_ppgtt;
appgtt->base.insert_entries(&appgtt->base,
- vma->obj->pages,
+ pages,
vma->node.start,
cache_level, flags);
vma->bound |= LOCAL_BIND;
@@ -2189,3 +2191,21 @@ i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object *obj,
return vma;
}
+
+void i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct sg_table *pages;
+
+ if (vma->ggtt_view.get_pages)
+ pages = vma->ggtt_view.get_pages(&vma->ggtt_view, vma->obj);
+ else
+ pages = vma->obj->pages;
+
+ if (pages && !IS_ERR(pages)) {
+ vma->bind_vma(vma, pages, cache_level, flags);
+
+ if (vma->ggtt_view.put_pages)
+ vma->ggtt_view.put_pages(&vma->ggtt_view);
+ }
+}
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 66bc44b..cbaddda 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -109,6 +109,23 @@ typedef gen8_gtt_pte_t gen8_ppgtt_pde_t;
#define GEN8_PPAT_ELLC_OVERRIDE (0<<2)
#define GEN8_PPAT(i, x) ((uint64_t) (x) << ((i) * 8))
+enum i915_ggtt_view_type {
+ I915_GGTT_VIEW_NORMAL = 0,
+};
+
+struct i915_ggtt_view {
+ enum i915_ggtt_view_type type;
+ unsigned int vma_id;
+ struct sg_table *pages;
+
+ struct sg_table *(*get_pages)(struct i915_ggtt_view *ggtt_view,
+ struct drm_i915_gem_object *obj);
+
+ void (*put_pages)(struct i915_ggtt_view *ggtt_view);
+};
+
+extern const struct i915_ggtt_view i915_ggtt_view_normal;
+
enum i915_cache_level;
/**
* A VMA represents a GEM BO that is bound into an address space. Therefore, a
@@ -136,6 +153,11 @@ struct i915_vma {
#define VMA_ID_DEFAULT (0)
unsigned int id;
+ /**
+ * Support different GGTT views into the same object.
+ */
+ struct i915_ggtt_view ggtt_view;
+
/** This object's place on the active/inactive lists */
struct list_head mm_list;
@@ -168,7 +190,7 @@ struct i915_vma {
* setting the valid PTE entries to a reserved scratch page. */
void (*unbind_vma)(struct i915_vma *vma);
/* Map an object into an address space with the given cache flags. */
- void (*bind_vma)(struct i915_vma *vma,
+ void (*bind_vma)(struct i915_vma *vma, struct sg_table *pages,
enum i915_cache_level cache_level,
u32 flags);
};
--
2.1.1
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