The existing kerneldoc was outdated, so time for a refresh.
v2: Use single line kdoc, mention functions for manipulation
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 99 +----------
drivers/gpu/drm/i915/i915_gem.c | 26 +--
drivers/gpu/drm/i915/i915_gem_context.c | 33 ++--
drivers/gpu/drm/i915/i915_gem_context.h | 272 +++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 2 +-
drivers/gpu/drm/i915/i915_gpu_error.c | 2 +-
drivers/gpu/drm/i915/intel_lrc.c | 2 +-
7 files changed, 301 insertions(+), 135 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_gem_context.h
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1aa33444115a..40d8b452a44a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -60,6 +60,7 @@
#include "intel_ringbuffer.h"
#include "i915_gem.h"
+#include "i915_gem_context.h"
#include "i915_gem_fence_reg.h"
#include "i915_gem_object.h"
#include "i915_gem_gtt.h"
@@ -1048,76 +1049,6 @@ enum i915_cache_level {
#define I915_COLOR_UNEVICTABLE (-1) /* a non-vma sharing the address space */
-#define DEFAULT_CONTEXT_HANDLE 0
-
-/**
- * struct i915_gem_context - as the name implies, represents a context.
- * @ref: reference count.
- * @user_handle: userspace tracking identity for this context.
- * @remap_slice: l3 row remapping information.
- * @flags: context specific flags:
- * CONTEXT_NO_ZEROMAP: do not allow mapping things to page 0.
- * @file_priv: filp associated with this context (NULL for global default
- * context).
- * @hang_stats: information about the role of this context in possible GPU
- * hangs.
- * @ppgtt: virtual memory space used by this context.
- * @legacy_hw_ctx: render context backing object and whether it is correctly
- * initialized (legacy ring submission mechanism only).
- * @link: link in the global list of contexts.
- *
- * Contexts are memory images used by the hardware to store copies of their
- * internal state.
- */
-struct i915_gem_context {
- struct kref ref;
- struct drm_i915_private *i915;
- struct drm_i915_file_private *file_priv;
- struct i915_hw_ppgtt *ppgtt;
- struct pid *pid;
- const char *name;
-
- unsigned long flags;
-#define CONTEXT_NO_ZEROMAP BIT(0)
-#define CONTEXT_NO_ERROR_CAPTURE BIT(1)
-
- /* Unique identifier for this context, used by the hw for tracking */
- unsigned int hw_id;
- u32 user_handle;
- int priority; /* greater priorities are serviced first */
-
- u32 ggtt_alignment;
- u32 ggtt_offset_bias;
-
- struct intel_context {
- struct i915_vma *state;
- struct intel_ring *ring;
- uint32_t *lrc_reg_state;
- u64 lrc_desc;
- int pin_count;
- bool initialised;
- } engine[I915_NUM_ENGINES];
- u32 ring_size;
- u32 desc_template;
- struct atomic_notifier_head status_notifier;
- bool execlists_force_single_submission;
-
- struct list_head link;
-
- u8 remap_slice;
- bool closed:1;
- bool bannable:1;
- bool banned:1;
-
- unsigned int guilty_count; /* guilty of a hang */
- unsigned int active_count; /* active during hang */
-
-#define CONTEXT_SCORE_GUILTY 10
-#define CONTEXT_SCORE_BAN_THRESHOLD 40
- /* Accumulated score of hangs caused by this context */
- int ban_score;
-};
-
enum fb_op_origin {
ORIGIN_GTT,
ORIGIN_CPU,
@@ -3494,18 +3425,6 @@ void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj,
void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj,
struct sg_table *pages);
-/* i915_gem_context.c */
-int __must_check i915_gem_context_init(struct drm_i915_private *dev_priv);
-void i915_gem_context_lost(struct drm_i915_private *dev_priv);
-void i915_gem_context_fini(struct drm_i915_private *dev_priv);
-int i915_gem_context_open(struct drm_device *dev, struct drm_file *file);
-void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
-int i915_switch_context(struct drm_i915_gem_request *req);
-int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv);
-void i915_gem_context_free(struct kref *ctx_ref);
-struct i915_gem_context *
-i915_gem_context_create_gvt(struct drm_device *dev);
-
static inline struct i915_gem_context *
i915_gem_context_lookup(struct drm_i915_file_private *file_priv, u32 id)
{
@@ -3551,22 +3470,6 @@ i915_gem_context_lookup_timeline(struct i915_gem_context *ctx,
return &vm->timeline.engine[engine->id];
}
-static inline bool i915_gem_context_is_default(const struct i915_gem_context *c)
-{
- return c->user_handle == DEFAULT_CONTEXT_HANDLE;
-}
-
-int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file);
-int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file);
-int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file);
-
int i915_perf_open_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 92560a776e17..d8760acf8001 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2656,34 +2656,24 @@ void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
goto out_unlock;
}
-static bool i915_context_is_banned(const struct i915_gem_context *ctx)
+static bool ban_context(const struct i915_gem_context *ctx)
{
- if (ctx->banned)
- return true;
-
- if (!ctx->bannable)
- return false;
-
- if (ctx->ban_score >= CONTEXT_SCORE_BAN_THRESHOLD) {
- DRM_DEBUG("context hanging too often, banning!\n");
- return true;
- }
-
- return false;
+ return (i915_gem_context_is_bannable(ctx) &&
+ ctx->ban_score >= CONTEXT_SCORE_BAN_THRESHOLD);
}
static void i915_gem_context_mark_guilty(struct i915_gem_context *ctx)
{
- ctx->ban_score += CONTEXT_SCORE_GUILTY;
-
- ctx->banned = i915_context_is_banned(ctx);
ctx->guilty_count++;
+ ctx->ban_score += CONTEXT_SCORE_GUILTY;
+ if (ban_context(ctx))
+ i915_gem_context_set_banned(ctx);
DRM_DEBUG_DRIVER("context %s marked guilty (score %d) banned? %s\n",
ctx->name, ctx->ban_score,
- yesno(ctx->banned));
+ yesno(i915_gem_context_is_banned(ctx)));
- if (!ctx->banned || IS_ERR_OR_NULL(ctx->file_priv))
+ if (!i915_gem_context_is_banned(ctx) || IS_ERR_OR_NULL(ctx->file_priv))
return;
ctx->file_priv->context_bans++;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 48e4ed5bb209..07ac81103f44 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -141,7 +141,7 @@ void i915_gem_context_free(struct kref *ctx_ref)
lockdep_assert_held(&ctx->i915->drm.struct_mutex);
trace_i915_context_free(ctx);
- GEM_BUG_ON(!ctx->closed);
+ GEM_BUG_ON(!i915_gem_context_is_closed(ctx));
i915_ppgtt_put(ctx->ppgtt);
@@ -228,8 +228,7 @@ static void i915_ppgtt_close(struct i915_address_space *vm)
static void context_close(struct i915_gem_context *ctx)
{
- GEM_BUG_ON(ctx->closed);
- ctx->closed = true;
+ i915_gem_context_set_closed(ctx);
if (ctx->ppgtt)
i915_ppgtt_close(&ctx->ppgtt->base);
ctx->file_priv = ERR_PTR(-EBADF);
@@ -329,7 +328,7 @@ __create_hw_context(struct drm_i915_private *dev_priv,
* is no remap info, it will be a NOP. */
ctx->remap_slice = ALL_L3_SLICES(dev_priv);
- ctx->bannable = true;
+ i915_gem_context_set_bannable(ctx);
ctx->ring_size = 4 * PAGE_SIZE;
ctx->desc_template = GEN8_CTX_ADDRESSING_MODE(dev_priv) <<
GEN8_CTX_ADDRESSING_MODE_SHIFT;
@@ -418,8 +417,9 @@ i915_gem_context_create_gvt(struct drm_device *dev)
if (IS_ERR(ctx))
goto out;
- ctx->closed = true; /* not user accessible */
- ctx->execlists_force_single_submission = true;
+ i915_gem_context_set_closed(ctx); /* not user accessible */
+ i915_gem_context_clear_bannable(ctx);
+ i915_gem_context_set_force_single_submission(ctx);
ctx->ring_size = 512 * PAGE_SIZE; /* Max ring buffer size */
out:
mutex_unlock(&dev->struct_mutex);
@@ -468,6 +468,7 @@ int i915_gem_context_init(struct drm_i915_private *dev_priv)
return PTR_ERR(ctx);
}
+ i915_gem_context_clear_bannable(ctx);
ctx->priority = I915_PRIORITY_MIN; /* lowest priority; idle task */
dev_priv->kernel_context = ctx;
@@ -1040,10 +1041,10 @@ int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
args->value = to_i915(dev)->ggtt.base.total;
break;
case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
- args->value = !!(ctx->flags & CONTEXT_NO_ERROR_CAPTURE);
+ args->value = i915_gem_context_no_error_capture(ctx);
break;
case I915_CONTEXT_PARAM_BANNABLE:
- args->value = ctx->bannable;
+ args->value = i915_gem_context_is_bannable(ctx);
break;
default:
ret = -EINVAL;
@@ -1085,22 +1086,22 @@ int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
}
break;
case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
- if (args->size) {
+ if (args->size)
ret = -EINVAL;
- } else {
- if (args->value)
- ctx->flags |= CONTEXT_NO_ERROR_CAPTURE;
- else
- ctx->flags &= ~CONTEXT_NO_ERROR_CAPTURE;
- }
+ else if (args->value)
+ i915_gem_context_set_no_error_capture(ctx);
+ else
+ i915_gem_context_clear_no_error_capture(ctx);
break;
case I915_CONTEXT_PARAM_BANNABLE:
if (args->size)
ret = -EINVAL;
else if (!capable(CAP_SYS_ADMIN) && !args->value)
ret = -EPERM;
+ else if (args->value)
+ i915_gem_context_set_bannable(ctx);
else
- ctx->bannable = args->value;
+ i915_gem_context_clear_bannable(ctx);
break;
default:
ret = -EINVAL;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.h b/drivers/gpu/drm/i915/i915_gem_context.h
new file mode 100644
index 000000000000..89f6764fb338
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_context.h
@@ -0,0 +1,272 @@
+/*
+ * 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_CONTEXT_H__
+#define __I915_GEM_CONTEXT_H__
+
+#include <linux/bitops.h>
+#include <linux/list.h>
+
+struct pid;
+
+struct drm_device;
+struct drm_file;
+
+struct drm_i915_private;
+struct drm_i915_file_private;
+struct i915_hw_ppgtt;
+struct i915_vma;
+struct intel_ring;
+
+#define DEFAULT_CONTEXT_HANDLE 0
+
+/**
+ * struct i915_gem_context - client state
+ *
+ * The struct i915_gem_context represents the combined view of the driver and
+ * logical hardware state for a particular client.
+ */
+struct i915_gem_context {
+ /** i915: i915 device backpointer */
+ struct drm_i915_private *i915;
+
+ /** file_priv: owning file descriptor */
+ struct drm_i915_file_private *file_priv;
+
+ /**
+ * @ppgtt: unique address space (GTT)
+ *
+ * In full-ppgtt mode, each context has its own address space ensuring
+ * complete seperation of one client from all others.
+ *
+ * In other modes, this is a NULL pointer with the expectation that
+ * the caller uses the shared global GTT.
+ */
+ struct i915_hw_ppgtt *ppgtt;
+
+ /**
+ * @pid: process id of creator
+ *
+ * Note that who created the context may not be the principle user,
+ * as the context may be shared across a local socket. However,
+ * that should only affect the default context, all contexts created
+ * explicitly by the client are expected to be isolated.
+ */
+ struct pid *pid;
+
+ /**
+ * @name: arbitrary name
+ *
+ * A name is constructed for the context from the creator's process
+ * name, pid and user handle in order to uniquely identify the
+ * context in messages.
+ */
+ const char *name;
+
+ /** link: place with &drm_i915_private.context_list */
+ struct list_head link;
+
+ /**
+ * @ref: reference count
+ *
+ * A reference to a context is held by both the client who created it
+ * and on each request submitted to the hardware using the request
+ * (to ensure the hardware has access to the state until it has
+ * finished all pending writes). See i915_gem_context_get() and
+ * i915_gem_context_put() for access.
+ */
+ struct kref ref;
+
+ /**
+ * @flags: small set of booleans
+ */
+ unsigned long flags;
+#define CONTEXT_NO_ZEROMAP BIT(0)
+#define CONTEXT_NO_ERROR_CAPTURE 1
+#define CONTEXT_CLOSED 2
+#define CONTEXT_BANNABLE 3
+#define CONTEXT_BANNED 4
+#define CONTEXT_FORCE_SINGLE_SUBMISSION 5
+
+ /**
+ * @hw_id: - unique identifier for the context
+ *
+ * The hardware needs to uniquely identify the context for a few
+ * functions like fault reporting, PASID, scheduling. The
+ * &drm_i915_private.context_hw_ida is used to assign a unqiue
+ * id for the lifetime of the context.
+ */
+ unsigned int hw_id;
+
+ /**
+ * @user_handle: userspace identifier
+ *
+ * A unique per-file identifier is generated from
+ * &drm_i915_file_private.contexts.
+ */
+ u32 user_handle;
+
+ /**
+ * @priority: execution and service priority
+ *
+ * All clients are equal, but some are more equal than others!
+ *
+ * Requests from a context with a greater (more positive) value of
+ * @priority will be executed before those with a lower @priority
+ * value, forming a simple QoS.
+ *
+ * The &drm_i915_private.kernel_context is assigned the lowest priority.
+ */
+ int priority;
+
+ /** ggtt_alignment: alignment restriction for context objects */
+ u32 ggtt_alignment;
+ /** ggtt_offset_bias: placement restriction for context objects */
+ u32 ggtt_offset_bias;
+
+ /** engine: per-engine logical HW state */
+ struct intel_context {
+ struct i915_vma *state;
+ struct intel_ring *ring;
+ u32 *lrc_reg_state;
+ u64 lrc_desc;
+ int pin_count;
+ bool initialised;
+ } engine[I915_NUM_ENGINES];
+
+ /** ring_size: size for allocating the per-engine ring buffer */
+ u32 ring_size;
+ /** desc_template: invariant fields for the HW context descriptor */
+ u32 desc_template;
+
+ /** status_notifier: list of callbacks for context-switch changes */
+ struct atomic_notifier_head status_notifier;
+
+ /** guilty_count: How many times this context has caused a GPU hang. */
+ unsigned int guilty_count;
+ /**
+ * @active_count: How many times this context was active during a GPU
+ * hang, but did not cause it.
+ */
+ unsigned int active_count;
+
+#define CONTEXT_SCORE_GUILTY 10
+#define CONTEXT_SCORE_BAN_THRESHOLD 40
+ /** ban_score: Accumulated score of all hangs caused by this context. */
+ int ban_score;
+
+ /** remap_slice: Bitmask of cache lines that need remapping */
+ u8 remap_slice;
+};
+
+static inline bool i915_gem_context_is_closed(const struct i915_gem_context *ctx)
+{
+ return test_bit(CONTEXT_CLOSED, &ctx->flags);
+}
+
+static inline void i915_gem_context_set_closed(struct i915_gem_context *ctx)
+{
+ GEM_BUG_ON(i915_gem_context_is_closed(ctx));
+ __set_bit(CONTEXT_CLOSED, &ctx->flags);
+}
+
+static inline bool i915_gem_context_no_error_capture(const struct i915_gem_context *ctx)
+{
+ return test_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
+}
+
+static inline void i915_gem_context_set_no_error_capture(struct i915_gem_context *ctx)
+{
+ __set_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
+}
+
+static inline void i915_gem_context_clear_no_error_capture(struct i915_gem_context *ctx)
+{
+ __clear_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
+}
+
+static inline bool i915_gem_context_is_bannable(const struct i915_gem_context *ctx)
+{
+ return test_bit(CONTEXT_BANNABLE, &ctx->flags);
+}
+
+static inline void i915_gem_context_set_bannable(struct i915_gem_context *ctx)
+{
+ __set_bit(CONTEXT_BANNABLE, &ctx->flags);
+}
+
+static inline void i915_gem_context_clear_bannable(struct i915_gem_context *ctx)
+{
+ __clear_bit(CONTEXT_BANNABLE, &ctx->flags);
+}
+
+static inline bool i915_gem_context_is_banned(const struct i915_gem_context *ctx)
+{
+ return test_bit(CONTEXT_BANNED, &ctx->flags);
+}
+
+static inline void i915_gem_context_set_banned(struct i915_gem_context *ctx)
+{
+ __set_bit(CONTEXT_BANNED, &ctx->flags);
+}
+
+static inline bool i915_gem_context_force_single_submission(const struct i915_gem_context *ctx)
+{
+ return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
+}
+
+static inline void i915_gem_context_set_force_single_submission(struct i915_gem_context *ctx)
+{
+ __set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
+}
+
+static inline bool i915_gem_context_is_default(const struct i915_gem_context *c)
+{
+ return c->user_handle == DEFAULT_CONTEXT_HANDLE;
+}
+
+/* i915_gem_context.c */
+int __must_check i915_gem_context_init(struct drm_i915_private *dev_priv);
+void i915_gem_context_lost(struct drm_i915_private *dev_priv);
+void i915_gem_context_fini(struct drm_i915_private *dev_priv);
+int i915_gem_context_open(struct drm_device *dev, struct drm_file *file);
+void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
+int i915_switch_context(struct drm_i915_gem_request *req);
+int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv);
+void i915_gem_context_free(struct kref *ctx_ref);
+struct i915_gem_context *
+i915_gem_context_create_gvt(struct drm_device *dev);
+
+int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+
+#endif /* !__I915_GEM_CONTEXT_H__ */
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index c64438f8171c..a5fe299da1d3 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1238,7 +1238,7 @@ i915_gem_validate_context(struct drm_device *dev, struct drm_file *file,
if (IS_ERR(ctx))
return ctx;
- if (ctx->banned) {
+ if (i915_gem_context_is_banned(ctx)) {
DRM_DEBUG("Context %u tried to submit while banned\n", ctx_id);
return ERR_PTR(-EIO);
}
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index e16037d1b0ba..e34532d98004 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1331,7 +1331,7 @@ static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
}
error->simulated |=
- request->ctx->flags & CONTEXT_NO_ERROR_CAPTURE;
+ i915_gem_context_no_error_capture(request->ctx);
ee->rq_head = request->head;
ee->rq_post = request->postfix;
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index fc64be1bdea7..227978820320 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -413,7 +413,7 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
static bool ctx_single_port_submission(const struct i915_gem_context *ctx)
{
return (IS_ENABLED(CONFIG_DRM_I915_GVT) &&
- ctx->execlists_force_single_submission);
+ i915_gem_context_force_single_submission(ctx));
}
static bool can_merge_ctx(const struct i915_gem_context *prev,
--
2.11.0
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