[RFC libdrm] intel: 48b ppgtt support
Michał Winiarski
michal.winiarski at intel.com
Fri Aug 7 04:00:29 PDT 2015
---
include/drm/i915_drm.h | 3 ++-
intel/intel_bufmgr.c | 11 +++++++++++
intel/intel_bufmgr.h | 1 +
intel/intel_bufmgr_gem.c | 43 +++++++++++++++++++++++++++++++++----------
intel/intel_bufmgr_priv.h | 8 ++++++++
5 files changed, 55 insertions(+), 11 deletions(-)
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index ded43b1..426b25c 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -680,7 +680,8 @@ struct drm_i915_gem_exec_object2 {
#define EXEC_OBJECT_NEEDS_FENCE (1<<0)
#define EXEC_OBJECT_NEEDS_GTT (1<<1)
#define EXEC_OBJECT_WRITE (1<<2)
-#define __EXEC_OBJECT_UNKNOWN_FLAGS -(EXEC_OBJECT_WRITE<<1)
+#define EXEC_OBJECT_SUPPORTS_48B_ADDRESS (1<<3)
+#define __EXEC_OBJECT_UNKNOWN_FLAGS -(EXEC_OBJECT_SUPPORTS_48B_ADDRESS<<1)
__u64 flags;
__u64 rsvd1;
diff --git a/intel/intel_bufmgr.c b/intel/intel_bufmgr.c
index 14ea9f9..97ea6ec 100644
--- a/intel/intel_bufmgr.c
+++ b/intel/intel_bufmgr.c
@@ -261,6 +261,17 @@ drm_intel_bo_get_tiling(drm_intel_bo *bo, uint32_t * tiling_mode,
}
int
+drm_intel_bo_use_full_range(drm_intel_bo *bo, uint32_t enable)
+{
+ if (bo->bufmgr->bo_use_full_range) {
+ bo->bufmgr->bo_use_full_range(bo, enable);
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
+int
drm_intel_bo_disable_reuse(drm_intel_bo *bo)
{
if (bo->bufmgr->bo_disable_reuse)
diff --git a/intel/intel_bufmgr.h b/intel/intel_bufmgr.h
index 285919e..2635fa4 100644
--- a/intel/intel_bufmgr.h
+++ b/intel/intel_bufmgr.h
@@ -160,6 +160,7 @@ int drm_intel_bo_get_tiling(drm_intel_bo *bo, uint32_t * tiling_mode,
int drm_intel_bo_flink(drm_intel_bo *bo, uint32_t * name);
int drm_intel_bo_busy(drm_intel_bo *bo);
int drm_intel_bo_madvise(drm_intel_bo *bo, int madv);
+int drm_intel_bo_use_full_range(drm_intel_bo *bo, uint32_t enable);
int drm_intel_bo_disable_reuse(drm_intel_bo *bo);
int drm_intel_bo_is_reusable(drm_intel_bo *bo);
diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index 41de396..ef71686 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -237,6 +237,11 @@ struct _drm_intel_bo_gem {
bool is_userptr;
/**
+ * Whether this buffer can be placed in full (2^48) ppgtt range on gen8+
+ */
+ bool uses_full_range;
+
+ /**
* Size in bytes of this buffer and its relocation descendents.
*
* Used to avoid costly tree walking in
@@ -395,8 +400,8 @@ drm_intel_gem_dump_validation_list(drm_intel_bufmgr_gem *bufmgr_gem)
drm_intel_bo_gem *target_gem =
(drm_intel_bo_gem *) target_bo;
- DBG("%2d: %d (%s)@0x%08llx -> "
- "%d (%s)@0x%08lx + 0x%08x\n",
+ DBG("%2d: %d (%s)@0x%016llx -> "
+ "%d (%s)@0x%016lx + 0x%08x\n",
i,
bo_gem->gem_handle, bo_gem->name,
(unsigned long long)bo_gem->relocs[j].offset,
@@ -468,11 +473,15 @@ drm_intel_add_validate_buffer2(drm_intel_bo *bo, int need_fence)
drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bo->bufmgr;
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *)bo;
int index;
+ int flags = 0;
+
+ if (need_fence)
+ flags |= EXEC_OBJECT_NEEDS_FENCE;
+ if (bo_gem->uses_full_range)
+ flags |= EXEC_OBJECT_SUPPORTS_48B_ADDRESS;
if (bo_gem->validate_index != -1) {
- if (need_fence)
- bufmgr_gem->exec2_objects[bo_gem->validate_index].flags |=
- EXEC_OBJECT_NEEDS_FENCE;
+ bufmgr_gem->exec2_objects[bo_gem->validate_index].flags |= flags;
return;
}
@@ -501,13 +510,9 @@ drm_intel_add_validate_buffer2(drm_intel_bo *bo, int need_fence)
bufmgr_gem->exec2_objects[index].alignment = bo->align;
bufmgr_gem->exec2_objects[index].offset = 0;
bufmgr_gem->exec_bos[index] = bo;
- bufmgr_gem->exec2_objects[index].flags = 0;
+ bufmgr_gem->exec2_objects[index].flags = flags;
bufmgr_gem->exec2_objects[index].rsvd1 = 0;
bufmgr_gem->exec2_objects[index].rsvd2 = 0;
- if (need_fence) {
- bufmgr_gem->exec2_objects[index].flags |=
- EXEC_OBJECT_NEEDS_FENCE;
- }
bufmgr_gem->exec_count++;
}
@@ -780,6 +785,7 @@ retry:
bo_gem->used_as_reloc_target = false;
bo_gem->has_error = false;
bo_gem->reusable = true;
+ bo_gem->uses_full_range = false;
drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, alignment);
@@ -926,6 +932,7 @@ drm_intel_gem_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
bo_gem->used_as_reloc_target = false;
bo_gem->has_error = false;
bo_gem->reusable = false;
+ bo_gem->uses_full_range = false;
drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0);
@@ -1081,6 +1088,7 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr,
bo_gem->bo.handle = open_arg.handle;
bo_gem->global_name = handle;
bo_gem->reusable = false;
+ bo_gem->uses_full_range = false;
memclear(get_tiling);
get_tiling.handle = bo_gem->gem_handle;
@@ -2418,6 +2426,13 @@ drm_intel_gem_bo_get_tiling(drm_intel_bo *bo, uint32_t * tiling_mode,
return 0;
}
+static void
+drm_intel_gem_bo_use_full_range(drm_intel_bo *bo, uint32_t enable)
+{
+ drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
+ bo_gem->uses_full_range = enable;
+}
+
drm_intel_bo *
drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int size)
{
@@ -2482,6 +2497,7 @@ drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int s
bo_gem->used_as_reloc_target = false;
bo_gem->has_error = false;
bo_gem->reusable = false;
+ bo_gem->uses_full_range = false;
DRMINITLISTHEAD(&bo_gem->vma_list);
DRMLISTADDTAIL(&bo_gem->name_list, &bufmgr_gem->named);
@@ -3278,6 +3294,13 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size)
}
}
+ if (bufmgr_gem->gen >= 8) {
+ gp.param = I915_PARAM_HAS_ALIASING_PPGTT;
+ ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp);
+ if (ret == 0 && *gp.value == 3)
+ bufmgr_gem->bufmgr.bo_use_full_range = drm_intel_gem_bo_use_full_range;
+ }
+
/* Let's go with one relocation per every 2 dwords (but round down a bit
* since a power of two will mean an extra page allocation for the reloc
* buffer).
diff --git a/intel/intel_bufmgr_priv.h b/intel/intel_bufmgr_priv.h
index 59ebd18..3461d31 100644
--- a/intel/intel_bufmgr_priv.h
+++ b/intel/intel_bufmgr_priv.h
@@ -227,6 +227,14 @@ struct _drm_intel_bufmgr {
uint32_t * swizzle_mode);
/**
+ * Indicate that the buffer can be placed in full ppgtt range (2^48)
+ * without restrictions.
+ * \param bo Buffer to set the full_range flag for
+ * \param enable Flag value
+ */
+ void (*bo_use_full_range) (drm_intel_bo *bo, uint32_t enable);
+
+ /**
* Create a visible name for a buffer which can be used by other apps
*
* \param buf Buffer to create a name for
--
2.4.3
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