[Intel-gfx] [PATCH v2 4/4] drm/i915: Move i915_gpu_error into its own header
Michal Wajdeczko
michal.wajdeczko at intel.com
Thu Mar 8 09:50:37 UTC 2018
Error state management code was moved into separate .c unit
but we didn't move related definitions into own header.
v2: move also intel_display_error_state forward decl
fix ("Prefer 'unsigned int' to bare use of 'unsigned'")
warnings detected by checkpatch in moved code (Michal)
Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drv.h | 332 +------------------------------
drivers/gpu/drm/i915/i915_gpu_error.c | 1 +
drivers/gpu/drm/i915/i915_gpu_error.h | 355 ++++++++++++++++++++++++++++++++++
3 files changed, 357 insertions(+), 331 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_gpu_error.h
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 604389d..3341af7 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -72,7 +72,7 @@
#include "i915_gem_object.h"
#include "i915_gem_gtt.h"
#include "i915_gem_timeline.h"
-
+#include "i915_gpu_error.h"
#include "i915_request.h"
#include "i915_vma.h"
@@ -453,172 +453,6 @@ struct intel_csr {
uint32_t allowed_dc_mask;
};
-struct intel_display_error_state;
-
-struct i915_gpu_state {
- struct kref ref;
- ktime_t time;
- ktime_t boottime;
- ktime_t uptime;
-
- struct drm_i915_private *i915;
-
- char error_msg[128];
- bool simulated;
- bool awake;
- bool wakelock;
- bool suspended;
- int iommu;
- u32 reset_count;
- u32 suspend_count;
- struct intel_device_info device_info;
- struct intel_driver_caps driver_caps;
- struct i915_params params;
-
- struct i915_error_uc {
- struct intel_uc_fw guc_fw;
- struct intel_uc_fw huc_fw;
- struct drm_i915_error_object *guc_log;
- } uc;
-
- /* Generic register state */
- u32 eir;
- u32 pgtbl_er;
- u32 ier;
- u32 gtier[4], ngtier;
- u32 ccid;
- u32 derrmr;
- u32 forcewake;
- u32 error; /* gen6+ */
- u32 err_int; /* gen7 */
- u32 fault_data0; /* gen8, gen9 */
- u32 fault_data1; /* gen8, gen9 */
- u32 done_reg;
- u32 gac_eco;
- u32 gam_ecochk;
- u32 gab_ctl;
- u32 gfx_mode;
-
- u32 nfence;
- u64 fence[I915_MAX_NUM_FENCES];
- struct intel_overlay_error_state *overlay;
- struct intel_display_error_state *display;
-
- struct drm_i915_error_engine {
- int engine_id;
- /* Software tracked state */
- bool idle;
- bool waiting;
- int num_waiters;
- unsigned long hangcheck_timestamp;
- bool hangcheck_stalled;
- enum intel_engine_hangcheck_action hangcheck_action;
- struct i915_address_space *vm;
- int num_requests;
- u32 reset_count;
-
- /* position of active request inside the ring */
- u32 rq_head, rq_post, rq_tail;
-
- /* our own tracking of ring head and tail */
- u32 cpu_ring_head;
- u32 cpu_ring_tail;
-
- u32 last_seqno;
-
- /* Register state */
- u32 start;
- u32 tail;
- u32 head;
- u32 ctl;
- u32 mode;
- u32 hws;
- u32 ipeir;
- u32 ipehr;
- u32 bbstate;
- u32 instpm;
- u32 instps;
- u32 seqno;
- u64 bbaddr;
- u64 acthd;
- u32 fault_reg;
- u64 faddr;
- u32 rc_psmi; /* sleep state */
- u32 semaphore_mboxes[I915_NUM_ENGINES - 1];
- struct intel_instdone instdone;
-
- struct drm_i915_error_context {
- char comm[TASK_COMM_LEN];
- pid_t pid;
- u32 handle;
- u32 hw_id;
- int priority;
- int ban_score;
- int active;
- int guilty;
- bool bannable;
- } context;
-
- struct drm_i915_error_object {
- u64 gtt_offset;
- u64 gtt_size;
- int page_count;
- int unused;
- u32 *pages[0];
- } *ringbuffer, *batchbuffer, *wa_batchbuffer, *ctx, *hws_page;
-
- struct drm_i915_error_object **user_bo;
- long user_bo_count;
-
- struct drm_i915_error_object *wa_ctx;
- struct drm_i915_error_object *default_state;
-
- struct drm_i915_error_request {
- long jiffies;
- pid_t pid;
- u32 context;
- int priority;
- int ban_score;
- u32 seqno;
- u32 head;
- u32 tail;
- } *requests, execlist[EXECLIST_MAX_PORTS];
- unsigned int num_ports;
-
- struct drm_i915_error_waiter {
- char comm[TASK_COMM_LEN];
- pid_t pid;
- u32 seqno;
- } *waiters;
-
- struct {
- u32 gfx_mode;
- union {
- u64 pdp[4];
- u32 pp_dir_base;
- };
- } vm_info;
- } engine[I915_NUM_ENGINES];
-
- struct drm_i915_error_buffer {
- u32 size;
- u32 name;
- u32 rseqno[I915_NUM_ENGINES], wseqno;
- u64 gtt_offset;
- u32 read_domains;
- u32 write_domain;
- s32 fence_reg:I915_MAX_NUM_FENCE_BITS;
- u32 tiling:2;
- u32 dirty:1;
- u32 purgeable:1;
- u32 userptr:1;
- s32 engine:4;
- u32 cache_level:3;
- } *active_bo[I915_NUM_ENGINES], *pinned_bo;
- u32 active_bo_count[I915_NUM_ENGINES], pinned_bo_count;
- struct i915_address_space *active_vm[I915_NUM_ENGINES];
-};
-
enum i915_cache_level {
I915_CACHE_NONE = 0,
I915_CACHE_LLC, /* also used for snoopable memory on non-LLC */
@@ -1146,16 +980,6 @@ struct i915_gem_mm {
u32 object_count;
};
-struct drm_i915_error_state_buf {
- struct drm_i915_private *i915;
- unsigned bytes;
- unsigned size;
- int err;
- u8 *buf;
- loff_t start;
- loff_t pos;
-};
-
#define I915_IDLE_ENGINES_TIMEOUT (200) /* in ms */
#define I915_RESET_TIMEOUT (10 * HZ) /* 10s */
@@ -1164,102 +988,6 @@ struct drm_i915_error_state_buf {
#define I915_ENGINE_DEAD_TIMEOUT (4 * HZ) /* Seqno, head and subunits dead */
#define I915_SEQNO_DEAD_TIMEOUT (12 * HZ) /* Seqno dead with active head */
-struct i915_gpu_error {
- /* For hangcheck timer */
-#define DRM_I915_HANGCHECK_PERIOD 1500 /* in ms */
-#define DRM_I915_HANGCHECK_JIFFIES msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)
-
- struct delayed_work hangcheck_work;
-
- /* For reset and error_state handling. */
- spinlock_t lock;
- /* Protected by the above dev->gpu_error.lock. */
- struct i915_gpu_state *first_error;
-
- atomic_t pending_fb_pin;
-
- unsigned long missed_irq_rings;
-
- /**
- * State variable controlling the reset flow and count
- *
- * This is a counter which gets incremented when reset is triggered,
- *
- * Before the reset commences, the I915_RESET_BACKOFF bit is set
- * meaning that any waiters holding onto the struct_mutex should
- * relinquish the lock immediately in order for the reset to start.
- *
- * If reset is not completed succesfully, the I915_WEDGE bit is
- * set meaning that hardware is terminally sour and there is no
- * recovery. All waiters on the reset_queue will be woken when
- * that happens.
- *
- * This counter is used by the wait_seqno code to notice that reset
- * event happened and it needs to restart the entire ioctl (since most
- * likely the seqno it waited for won't ever signal anytime soon).
- *
- * This is important for lock-free wait paths, where no contended lock
- * naturally enforces the correct ordering between the bail-out of the
- * waiter and the gpu reset work code.
- */
- unsigned long reset_count;
-
- /**
- * flags: Control various stages of the GPU reset
- *
- * #I915_RESET_BACKOFF - When we start a reset, we want to stop any
- * other users acquiring the struct_mutex. To do this we set the
- * #I915_RESET_BACKOFF bit in the error flags when we detect a reset
- * and then check for that bit before acquiring the struct_mutex (in
- * i915_mutex_lock_interruptible()?). I915_RESET_BACKOFF serves a
- * secondary role in preventing two concurrent global reset attempts.
- *
- * #I915_RESET_HANDOFF - To perform the actual GPU reset, we need the
- * struct_mutex. We try to acquire the struct_mutex in the reset worker,
- * but it may be held by some long running waiter (that we cannot
- * interrupt without causing trouble). Once we are ready to do the GPU
- * reset, we set the I915_RESET_HANDOFF bit and wakeup any waiters. If
- * they already hold the struct_mutex and want to participate they can
- * inspect the bit and do the reset directly, otherwise the worker
- * waits for the struct_mutex.
- *
- * #I915_RESET_ENGINE[num_engines] - Since the driver doesn't need to
- * acquire the struct_mutex to reset an engine, we need an explicit
- * flag to prevent two concurrent reset attempts in the same engine.
- * As the number of engines continues to grow, allocate the flags from
- * the most significant bits.
- *
- * #I915_WEDGED - If reset fails and we can no longer use the GPU,
- * we set the #I915_WEDGED bit. Prior to command submission, e.g.
- * i915_request_alloc(), this bit is checked and the sequence
- * aborted (with -EIO reported to userspace) if set.
- */
- unsigned long flags;
-#define I915_RESET_BACKOFF 0
-#define I915_RESET_HANDOFF 1
-#define I915_RESET_MODESET 2
-#define I915_WEDGED (BITS_PER_LONG - 1)
-#define I915_RESET_ENGINE (I915_WEDGED - I915_NUM_ENGINES)
-
- /** Number of times an engine has been reset */
- u32 reset_engine_count[I915_NUM_ENGINES];
-
- /**
- * Waitqueue to signal when a hang is detected. Used to for waiters
- * to release the struct_mutex for the reset to procede.
- */
- wait_queue_head_t wait_queue;
-
- /**
- * Waitqueue to signal when the reset has completed. Used by clients
- * that wait for dev_priv->mm.wedged to settle.
- */
- wait_queue_head_t reset_queue;
-
- /* For missed irq/seqno simulation. */
- unsigned long test_irq_rings;
-};
-
enum modeset_restore {
MODESET_ON_LID_OPEN,
MODESET_DONE,
@@ -3589,64 +3317,6 @@ static inline int i915_debugfs_connector_add(struct drm_connector *connector)
static inline void intel_display_crc_init(struct drm_i915_private *dev_priv) {}
#endif
-/* i915_gpu_error.c */
-#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
-
-__printf(2, 3)
-void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...);
-int i915_error_state_to_str(struct drm_i915_error_state_buf *estr,
- const struct i915_gpu_state *gpu);
-int i915_error_state_buf_init(struct drm_i915_error_state_buf *eb,
- struct drm_i915_private *i915,
- size_t count, loff_t pos);
-static inline void i915_error_state_buf_release(
- struct drm_i915_error_state_buf *eb)
-{
- kfree(eb->buf);
-}
-
-struct i915_gpu_state *i915_capture_gpu_state(struct drm_i915_private *i915);
-void i915_capture_error_state(struct drm_i915_private *dev_priv,
- u32 engine_mask,
- const char *error_msg);
-
-static inline struct i915_gpu_state *
-i915_gpu_state_get(struct i915_gpu_state *gpu)
-{
- kref_get(&gpu->ref);
- return gpu;
-}
-
-void __i915_gpu_state_free(struct kref *kref);
-static inline void i915_gpu_state_put(struct i915_gpu_state *gpu)
-{
- if (gpu)
- kref_put(&gpu->ref, __i915_gpu_state_free);
-}
-
-struct i915_gpu_state *i915_first_error_state(struct drm_i915_private *i915);
-void i915_reset_error_state(struct drm_i915_private *i915);
-
-#else
-
-static inline void i915_capture_error_state(struct drm_i915_private *dev_priv,
- u32 engine_mask,
- const char *error_msg)
-{
-}
-
-static inline struct i915_gpu_state *
-i915_first_error_state(struct drm_i915_private *i915)
-{
- return NULL;
-}
-
-static inline void i915_reset_error_state(struct drm_i915_private *i915)
-{
-}
-
-#endif
-
const char *i915_cache_level_str(struct drm_i915_private *i915, int type);
/* i915_cmd_parser.c */
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 9e5e954..9b3bf45 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -32,6 +32,7 @@
#include <linux/zlib.h>
#include <drm/drm_print.h>
+#include "i915_gpu_error.h"
#include "i915_drv.h"
static inline const struct intel_engine_cs *
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.h b/drivers/gpu/drm/i915/i915_gpu_error.h
new file mode 100644
index 0000000..840318b
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gpu_error.h
@@ -0,0 +1,355 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2008-2018 Intel Corporation
+ */
+
+#ifndef _I915_GPU_ERROR_H_
+#define _I915_GPU_ERROR_H_
+
+#include <linux/kref.h>
+#include <linux/ktime.h>
+#include <linux/sched.h>
+
+#include <drm/drm_mm.h>
+
+#include "intel_device_info.h"
+#include "intel_ringbuffer.h"
+#include "intel_uc_fw.h"
+
+#include "i915_gem.h"
+#include "i915_gem_gtt.h"
+#include "i915_params.h"
+
+struct drm_i915_private;
+struct intel_overlay_error_state;
+struct intel_display_error_state;
+
+struct i915_gpu_state {
+ struct kref ref;
+ ktime_t time;
+ ktime_t boottime;
+ ktime_t uptime;
+
+ struct drm_i915_private *i915;
+
+ char error_msg[128];
+ bool simulated;
+ bool awake;
+ bool wakelock;
+ bool suspended;
+ int iommu;
+ u32 reset_count;
+ u32 suspend_count;
+ struct intel_device_info device_info;
+ struct intel_driver_caps driver_caps;
+ struct i915_params params;
+
+ struct i915_error_uc {
+ struct intel_uc_fw guc_fw;
+ struct intel_uc_fw huc_fw;
+ struct drm_i915_error_object *guc_log;
+ } uc;
+
+ /* Generic register state */
+ u32 eir;
+ u32 pgtbl_er;
+ u32 ier;
+ u32 gtier[4], ngtier;
+ u32 ccid;
+ u32 derrmr;
+ u32 forcewake;
+ u32 error; /* gen6+ */
+ u32 err_int; /* gen7 */
+ u32 fault_data0; /* gen8, gen9 */
+ u32 fault_data1; /* gen8, gen9 */
+ u32 done_reg;
+ u32 gac_eco;
+ u32 gam_ecochk;
+ u32 gab_ctl;
+ u32 gfx_mode;
+
+ u32 nfence;
+ u64 fence[I915_MAX_NUM_FENCES];
+ struct intel_overlay_error_state *overlay;
+ struct intel_display_error_state *display;
+
+ struct drm_i915_error_engine {
+ int engine_id;
+ /* Software tracked state */
+ bool idle;
+ bool waiting;
+ int num_waiters;
+ unsigned long hangcheck_timestamp;
+ bool hangcheck_stalled;
+ enum intel_engine_hangcheck_action hangcheck_action;
+ struct i915_address_space *vm;
+ int num_requests;
+ u32 reset_count;
+
+ /* position of active request inside the ring */
+ u32 rq_head, rq_post, rq_tail;
+
+ /* our own tracking of ring head and tail */
+ u32 cpu_ring_head;
+ u32 cpu_ring_tail;
+
+ u32 last_seqno;
+
+ /* Register state */
+ u32 start;
+ u32 tail;
+ u32 head;
+ u32 ctl;
+ u32 mode;
+ u32 hws;
+ u32 ipeir;
+ u32 ipehr;
+ u32 bbstate;
+ u32 instpm;
+ u32 instps;
+ u32 seqno;
+ u64 bbaddr;
+ u64 acthd;
+ u32 fault_reg;
+ u64 faddr;
+ u32 rc_psmi; /* sleep state */
+ u32 semaphore_mboxes[I915_NUM_ENGINES - 1];
+ struct intel_instdone instdone;
+
+ struct drm_i915_error_context {
+ char comm[TASK_COMM_LEN];
+ pid_t pid;
+ u32 handle;
+ u32 hw_id;
+ int priority;
+ int ban_score;
+ int active;
+ int guilty;
+ bool bannable;
+ } context;
+
+ struct drm_i915_error_object {
+ u64 gtt_offset;
+ u64 gtt_size;
+ int page_count;
+ int unused;
+ u32 *pages[0];
+ } *ringbuffer, *batchbuffer, *wa_batchbuffer, *ctx, *hws_page;
+
+ struct drm_i915_error_object **user_bo;
+ long user_bo_count;
+
+ struct drm_i915_error_object *wa_ctx;
+ struct drm_i915_error_object *default_state;
+
+ struct drm_i915_error_request {
+ long jiffies;
+ pid_t pid;
+ u32 context;
+ int priority;
+ int ban_score;
+ u32 seqno;
+ u32 head;
+ u32 tail;
+ } *requests, execlist[EXECLIST_MAX_PORTS];
+ unsigned int num_ports;
+
+ struct drm_i915_error_waiter {
+ char comm[TASK_COMM_LEN];
+ pid_t pid;
+ u32 seqno;
+ } *waiters;
+
+ struct {
+ u32 gfx_mode;
+ union {
+ u64 pdp[4];
+ u32 pp_dir_base;
+ };
+ } vm_info;
+ } engine[I915_NUM_ENGINES];
+
+ struct drm_i915_error_buffer {
+ u32 size;
+ u32 name;
+ u32 rseqno[I915_NUM_ENGINES], wseqno;
+ u64 gtt_offset;
+ u32 read_domains;
+ u32 write_domain;
+ s32 fence_reg:I915_MAX_NUM_FENCE_BITS;
+ u32 tiling:2;
+ u32 dirty:1;
+ u32 purgeable:1;
+ u32 userptr:1;
+ s32 engine:4;
+ u32 cache_level:3;
+ } *active_bo[I915_NUM_ENGINES], *pinned_bo;
+ u32 active_bo_count[I915_NUM_ENGINES], pinned_bo_count;
+ struct i915_address_space *active_vm[I915_NUM_ENGINES];
+};
+
+struct i915_gpu_error {
+ /* For hangcheck timer */
+#define DRM_I915_HANGCHECK_PERIOD 1500 /* in ms */
+#define DRM_I915_HANGCHECK_JIFFIES msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)
+
+ struct delayed_work hangcheck_work;
+
+ /* For reset and error_state handling. */
+ spinlock_t lock;
+ /* Protected by the above dev->gpu_error.lock. */
+ struct i915_gpu_state *first_error;
+
+ atomic_t pending_fb_pin;
+
+ unsigned long missed_irq_rings;
+
+ /**
+ * State variable controlling the reset flow and count
+ *
+ * This is a counter which gets incremented when reset is triggered,
+ *
+ * Before the reset commences, the I915_RESET_BACKOFF bit is set
+ * meaning that any waiters holding onto the struct_mutex should
+ * relinquish the lock immediately in order for the reset to start.
+ *
+ * If reset is not completed successfully, the I915_WEDGE bit is
+ * set meaning that hardware is terminally sour and there is no
+ * recovery. All waiters on the reset_queue will be woken when
+ * that happens.
+ *
+ * This counter is used by the wait_seqno code to notice that reset
+ * event happened and it needs to restart the entire ioctl (since most
+ * likely the seqno it waited for won't ever signal anytime soon).
+ *
+ * This is important for lock-free wait paths, where no contended lock
+ * naturally enforces the correct ordering between the bail-out of the
+ * waiter and the gpu reset work code.
+ */
+ unsigned long reset_count;
+
+ /**
+ * flags: Control various stages of the GPU reset
+ *
+ * #I915_RESET_BACKOFF - When we start a reset, we want to stop any
+ * other users acquiring the struct_mutex. To do this we set the
+ * #I915_RESET_BACKOFF bit in the error flags when we detect a reset
+ * and then check for that bit before acquiring the struct_mutex (in
+ * i915_mutex_lock_interruptible()?). I915_RESET_BACKOFF serves a
+ * secondary role in preventing two concurrent global reset attempts.
+ *
+ * #I915_RESET_HANDOFF - To perform the actual GPU reset, we need the
+ * struct_mutex. We try to acquire the struct_mutex in the reset worker,
+ * but it may be held by some long running waiter (that we cannot
+ * interrupt without causing trouble). Once we are ready to do the GPU
+ * reset, we set the I915_RESET_HANDOFF bit and wakeup any waiters. If
+ * they already hold the struct_mutex and want to participate they can
+ * inspect the bit and do the reset directly, otherwise the worker
+ * waits for the struct_mutex.
+ *
+ * #I915_RESET_ENGINE[num_engines] - Since the driver doesn't need to
+ * acquire the struct_mutex to reset an engine, we need an explicit
+ * flag to prevent two concurrent reset attempts in the same engine.
+ * As the number of engines continues to grow, allocate the flags from
+ * the most significant bits.
+ *
+ * #I915_WEDGED - If reset fails and we can no longer use the GPU,
+ * we set the #I915_WEDGED bit. Prior to command submission, e.g.
+ * i915_request_alloc(), this bit is checked and the sequence
+ * aborted (with -EIO reported to userspace) if set.
+ */
+ unsigned long flags;
+#define I915_RESET_BACKOFF 0
+#define I915_RESET_HANDOFF 1
+#define I915_RESET_MODESET 2
+#define I915_WEDGED (BITS_PER_LONG - 1)
+#define I915_RESET_ENGINE (I915_WEDGED - I915_NUM_ENGINES)
+
+ /** Number of times an engine has been reset */
+ u32 reset_engine_count[I915_NUM_ENGINES];
+
+ /**
+ * Waitqueue to signal when a hang is detected. Used to for waiters
+ * to release the struct_mutex for the reset to procede.
+ */
+ wait_queue_head_t wait_queue;
+
+ /**
+ * Waitqueue to signal when the reset has completed. Used by clients
+ * that wait for dev_priv->mm.wedged to settle.
+ */
+ wait_queue_head_t reset_queue;
+
+ /* For missed irq/seqno simulation. */
+ unsigned long test_irq_rings;
+};
+
+struct drm_i915_error_state_buf {
+ struct drm_i915_private *i915;
+ unsigned int bytes;
+ unsigned int size;
+ int err;
+ u8 *buf;
+ loff_t start;
+ loff_t pos;
+};
+
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+
+__printf(2, 3)
+void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...);
+int i915_error_state_to_str(struct drm_i915_error_state_buf *estr,
+ const struct i915_gpu_state *gpu);
+int i915_error_state_buf_init(struct drm_i915_error_state_buf *eb,
+ struct drm_i915_private *i915,
+ size_t count, loff_t pos);
+static inline void i915_error_state_buf_release(
+ struct drm_i915_error_state_buf *eb)
+{
+ kfree(eb->buf);
+}
+
+struct i915_gpu_state *i915_capture_gpu_state(struct drm_i915_private *i915);
+void i915_capture_error_state(struct drm_i915_private *dev_priv,
+ u32 engine_mask,
+ const char *error_msg);
+
+static inline struct i915_gpu_state *
+i915_gpu_state_get(struct i915_gpu_state *gpu)
+{
+ kref_get(&gpu->ref);
+ return gpu;
+}
+
+void __i915_gpu_state_free(struct kref *kref);
+static inline void i915_gpu_state_put(struct i915_gpu_state *gpu)
+{
+ if (gpu)
+ kref_put(&gpu->ref, __i915_gpu_state_free);
+}
+
+struct i915_gpu_state *i915_first_error_state(struct drm_i915_private *i915);
+void i915_reset_error_state(struct drm_i915_private *i915);
+
+#else
+
+static inline void i915_capture_error_state(struct drm_i915_private *dev_priv,
+ u32 engine_mask,
+ const char *error_msg)
+{
+}
+
+static inline struct i915_gpu_state *
+i915_first_error_state(struct drm_i915_private *i915)
+{
+ return NULL;
+}
+
+static inline void i915_reset_error_state(struct drm_i915_private *i915)
+{
+}
+
+#endif /* IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) */
+
+#endif /* _I915_GPU_ERROR_H_ */
--
1.9.1
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