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Commit 27c01aae authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Prepare i915_gem_active for annotations 



In the future, we will want to add annotations to the i915_gem_active
struct. The API is thus expanded to hide direct access to the contents
of i915_gem_active and mediated instead through a number of helpers.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-11-git-send-email-chris@chris-wilson.co.uk
parent 381f371b

drivers/gpu/drm/i915/i915_debugfs.c

+8 −5
Original line number Diff line number Diff line
@@ -155,10 +155,10 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj) 
		   obj->base.write_domain);

	for_each_engine_id(engine, dev_priv, id)

		seq_printf(m, "%x ",

			   i915_gem_request_get_seqno(obj->last_read[id].request));

			   i915_gem_active_get_seqno(&obj->last_read[id]));

	seq_printf(m, "] %x %x%s%s%s",

		   i915_gem_request_get_seqno(obj->last_write.request),

		   i915_gem_request_get_seqno(obj->last_fence.request),

		   i915_gem_active_get_seqno(&obj->last_write),

		   i915_gem_active_get_seqno(&obj->last_fence),

		   i915_cache_level_str(to_i915(obj->base.dev), obj->cache_level),

		   obj->dirty ? " dirty" : "",

		   obj->madv == I915_MADV_DONTNEED ? " purgeable" : "");
@@ -195,8 +195,11 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj) 
		*t = '\0';

		seq_printf(m, " (%s mappable)", s);

	}

	if (obj->last_write.request)

		seq_printf(m, " (%s)", obj->last_write.request->engine->name);



	engine = i915_gem_active_get_engine(&obj->last_write);

	if (engine)

		seq_printf(m, " (%s)", engine->name);



	if (obj->frontbuffer_bits)

		seq_printf(m, " (frontbuffer: 0x%03x)", obj->frontbuffer_bits);

}

drivers/gpu/drm/i915/i915_gem.c

+49 −36
Original line number Diff line number Diff line
@@ -1349,27 +1349,30 @@ int 
i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj,

			       bool readonly)

{

	struct drm_i915_gem_request *request;

	struct reservation_object *resv;

	int ret, i;



	if (readonly) {

		if (obj->last_write.request) {

			ret = i915_wait_request(obj->last_write.request);

		request = i915_gem_active_peek(&obj->last_write);

		if (request) {

			ret = i915_wait_request(request);

			if (ret)

				return ret;



			i = obj->last_write.request->engine->id;

			if (obj->last_read[i].request == obj->last_write.request)

			i = request->engine->id;

			if (i915_gem_active_peek(&obj->last_read[i]) == request)

				i915_gem_object_retire__read(obj, i);

			else

				i915_gem_object_retire__write(obj);

		}

	} else {

		for (i = 0; i < I915_NUM_ENGINES; i++) {

			if (!obj->last_read[i].request)

			request = i915_gem_active_peek(&obj->last_read[i]);

			if (!request)

				continue;



			ret = i915_wait_request(obj->last_read[i].request);

			ret = i915_wait_request(request);

			if (ret)

				return ret;
@@ -1397,9 +1400,9 @@ i915_gem_object_retire_request(struct drm_i915_gem_object *obj, 
{

	int idx = req->engine->id;



	if (obj->last_read[idx].request == req)

	if (i915_gem_active_peek(&obj->last_read[idx]) == req)

		i915_gem_object_retire__read(obj, idx);

	else if (obj->last_write.request == req)

	else if (i915_gem_active_peek(&obj->last_write) == req)

		i915_gem_object_retire__write(obj);



	if (!i915_reset_in_progress(&req->i915->gpu_error))
@@ -1428,20 +1431,20 @@ i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj, 
	if (readonly) {

		struct drm_i915_gem_request *req;



		req = obj->last_write.request;

		req = i915_gem_active_get(&obj->last_write);

		if (req == NULL)

			return 0;



		requests[n++] = i915_gem_request_get(req);

		requests[n++] = req;

	} else {

		for (i = 0; i < I915_NUM_ENGINES; i++) {

			struct drm_i915_gem_request *req;



			req = obj->last_read[i].request;

			req = i915_gem_active_get(&obj->last_read[i]);

			if (req == NULL)

				continue;



			requests[n++] = i915_gem_request_get(req);

			requests[n++] = req;

		}

	}
@@ -2383,8 +2386,8 @@ void i915_vma_move_to_active(struct i915_vma *vma, 
static void

i915_gem_object_retire__write(struct drm_i915_gem_object *obj)

{

	GEM_BUG_ON(!obj->last_write.request);

	GEM_BUG_ON(!(obj->active & intel_engine_flag(obj->last_write.request->engine)));

	GEM_BUG_ON(!i915_gem_active_isset(&obj->last_write));

	GEM_BUG_ON(!(obj->active & intel_engine_flag(i915_gem_active_get_engine(&obj->last_write))));



	i915_gem_active_set(&obj->last_write, NULL);

	intel_fb_obj_flush(obj, true, ORIGIN_CS);
@@ -2393,15 +2396,17 @@ i915_gem_object_retire__write(struct drm_i915_gem_object *obj) 
static void

i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int idx)

{

	struct intel_engine_cs *engine;

	struct i915_vma *vma;



	GEM_BUG_ON(!obj->last_read[idx].request);

	GEM_BUG_ON(!i915_gem_active_isset(&obj->last_read[idx]));

	GEM_BUG_ON(!(obj->active & (1 << idx)));



	list_del_init(&obj->engine_list[idx]);

	i915_gem_active_set(&obj->last_read[idx], NULL);



	if (obj->last_write.request && obj->last_write.request->engine->id == idx)

	engine = i915_gem_active_get_engine(&obj->last_write);

	if (engine && engine->id == idx)

		i915_gem_object_retire__write(obj);



	obj->active &= ~(1 << idx);
@@ -2621,7 +2626,7 @@ i915_gem_retire_requests_ring(struct intel_engine_cs *engine) 
				       struct drm_i915_gem_object,

				       engine_list[engine->id]);



		if (!list_empty(&obj->last_read[engine->id].request->list))

		if (!list_empty(&i915_gem_active_peek(&obj->last_read[engine->id])->list))

			break;



		i915_gem_object_retire__read(obj, engine->id);
@@ -2754,7 +2759,7 @@ i915_gem_object_flush_active(struct drm_i915_gem_object *obj) 
	for (i = 0; i < I915_NUM_ENGINES; i++) {

		struct drm_i915_gem_request *req;



		req = obj->last_read[i].request;

		req = i915_gem_active_peek(&obj->last_read[i]);

		if (req == NULL)

			continue;
@@ -2794,7 +2799,7 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) 
{

	struct drm_i915_gem_wait *args = data;

	struct drm_i915_gem_object *obj;

	struct drm_i915_gem_request *req[I915_NUM_ENGINES];

	struct drm_i915_gem_request *requests[I915_NUM_ENGINES];

	int i, n = 0;

	int ret;
@@ -2830,20 +2835,21 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) 
	i915_gem_object_put(obj);



	for (i = 0; i < I915_NUM_ENGINES; i++) {

		if (!obj->last_read[i].request)

			continue;

		struct drm_i915_gem_request *req;



		req[n++] = i915_gem_request_get(obj->last_read[i].request);

		req = i915_gem_active_get(&obj->last_read[i]);

		if (req)

			requests[n++] = req;

	}



	mutex_unlock(&dev->struct_mutex);



	for (i = 0; i < n; i++) {

		if (ret == 0)

			ret = __i915_wait_request(req[i], true,

			ret = __i915_wait_request(requests[i], true,

						  args->timeout_ns > 0 ? &args->timeout_ns : NULL,

						  to_rps_client(file));

		i915_gem_request_put(req[i]);

		i915_gem_request_put(requests[i]);

	}

	return ret;
@@ -2916,7 +2922,7 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj, 
		     struct drm_i915_gem_request *to)

{

	const bool readonly = obj->base.pending_write_domain == 0;

	struct drm_i915_gem_request *req[I915_NUM_ENGINES];

	struct drm_i915_gem_request *requests[I915_NUM_ENGINES];

	int ret, i, n;



	if (!obj->active)
@@ -2924,15 +2930,22 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj, 


	n = 0;

	if (readonly) {

		if (obj->last_write.request)

			req[n++] = obj->last_write.request;

		struct drm_i915_gem_request *req;



		req = i915_gem_active_peek(&obj->last_write);

		if (req)

			requests[n++] = req;

	} else {

		for (i = 0; i < I915_NUM_ENGINES; i++)

			if (obj->last_read[i].request)

				req[n++] = obj->last_read[i].request;

		for (i = 0; i < I915_NUM_ENGINES; i++) {

			struct drm_i915_gem_request *req;



			req = i915_gem_active_peek(&obj->last_read[i]);

			if (req)

				requests[n++] = req;

		}

	}

	for (i = 0; i < n; i++) {

		ret = __i915_gem_object_sync(obj, to, req[i]);

		ret = __i915_gem_object_sync(obj, to, requests[i]);

		if (ret)

			return ret;

	}
@@ -4021,17 +4034,17 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data, 


	args->busy = 0;

	if (obj->active) {

		struct drm_i915_gem_request *req;

		int i;



		for (i = 0; i < I915_NUM_ENGINES; i++) {

			struct drm_i915_gem_request *req;



			req = obj->last_read[i].request;

			req = i915_gem_active_peek(&obj->last_read[i]);

			if (req)

				args->busy |= 1 << (16 + req->engine->exec_id);

		}

		if (obj->last_write.request)

			args->busy |= obj->last_write.request->engine->exec_id;

		req = i915_gem_active_peek(&obj->last_write);

		if (req)

			args->busy |= req->engine->exec_id;

	}



unref:

drivers/gpu/drm/i915/i915_gem_fence.c

+5 −6
Original line number Diff line number Diff line
@@ -261,14 +261,13 @@ static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj) 
static int

i915_gem_object_wait_fence(struct drm_i915_gem_object *obj)

{

	if (obj->last_fence.request) {

		int ret = i915_wait_request(obj->last_fence.request);

	int ret;



	ret = i915_gem_active_wait(&obj->last_fence);

	if (ret)

		return ret;



	i915_gem_active_set(&obj->last_fence, NULL);

	}



	return 0;

}

drivers/gpu/drm/i915/i915_gem_request.h

+127 −0
Original line number Diff line number Diff line
@@ -280,6 +280,15 @@ struct i915_gem_active { 
	struct drm_i915_gem_request *request;

};



/**

 * i915_gem_active_set - updates the tracker to watch the current request

 * @active - the active tracker

 * @request - the request to watch

 *

 * i915_gem_active_set() watches the given @request for completion. Whilst

 * that @request is busy, the @active reports busy. When that @request is

 * retired, the @active tracker is updated to report idle.

 */

static inline void

i915_gem_active_set(struct i915_gem_active *active,

		    struct drm_i915_gem_request *request)
@@ -287,6 +296,124 @@ i915_gem_active_set(struct i915_gem_active *active, 
	i915_gem_request_assign(&active->request, request);

}



/**

 * i915_gem_active_peek - report the request being monitored

 * @active - the active tracker

 *

 * i915_gem_active_peek() returns the current request being tracked, or NULL.

 * It does not obtain a reference on the request for the caller, so the

 * caller must hold struct_mutex.

 */

static inline struct drm_i915_gem_request *

i915_gem_active_peek(const struct i915_gem_active *active)

{

	return active->request;

}



/**

 * i915_gem_active_get - return a reference to the active request

 * @active - the active tracker

 *

 * i915_gem_active_get() returns a reference to the active request, or NULL

 * if the active tracker is idle. The caller must hold struct_mutex.

 */

static inline struct drm_i915_gem_request *

i915_gem_active_get(const struct i915_gem_active *active)

{

	struct drm_i915_gem_request *request;



	request = i915_gem_active_peek(active);

	if (!request || i915_gem_request_completed(request))

		return NULL;



	return i915_gem_request_get(request);

}



/**

 * i915_gem_active_isset - report whether the active tracker is assigned

 * @active - the active tracker

 *

 * i915_gem_active_isset() returns true if the active tracker is currently

 * assigned to a request. Due to the lazy retiring, that request may be idle

 * and this may report stale information.

 */

static inline bool

i915_gem_active_isset(const struct i915_gem_active *active)

{

	return active->request;

}



/**

 * i915_gem_active_is_idle - report whether the active tracker is idle

 * @active - the active tracker

 *

 * i915_gem_active_is_idle() returns true if the active tracker is currently

 * unassigned or if the request is complete (but not yet retired). Requires

 * the caller to hold struct_mutex (but that can be relaxed if desired).

 */

static inline bool

i915_gem_active_is_idle(const struct i915_gem_active *active)

{

	struct drm_i915_gem_request *request;



	request = i915_gem_active_peek(active);

	if (!request || i915_gem_request_completed(request))

		return true;



	return false;

}



/**

 * i915_gem_active_wait - waits until the request is completed

 * @active - the active request on which to wait

 *

 * i915_gem_active_wait() waits until the request is completed before

 * returning. Note that it does not guarantee that the request is

 * retired first, see i915_gem_active_retire().

 */

static inline int __must_check

i915_gem_active_wait(const struct i915_gem_active *active)

{

	struct drm_i915_gem_request *request;



	request = i915_gem_active_peek(active);

	if (!request)

		return 0;



	return i915_wait_request(request);

}



/**

 * i915_gem_active_retire - waits until the request is retired

 * @active - the active request on which to wait

 *

 * i915_gem_active_retire() waits until the request is completed,

 * and then ensures that at least the retirement handler for this

 * @active tracker is called before returning. If the @active

 * tracker is idle, the function returns immediately.

 */

static inline int __must_check

i915_gem_active_retire(const struct i915_gem_active *active)

{

	return i915_gem_active_wait(active);

}



/* Convenience functions for peeking at state inside active's request whilst

 * guarded by the struct_mutex.

 */



static inline uint32_t

i915_gem_active_get_seqno(const struct i915_gem_active *active)

{

	return i915_gem_request_get_seqno(i915_gem_active_peek(active));

}



static inline struct intel_engine_cs *

i915_gem_active_get_engine(const struct i915_gem_active *active)

{

	return i915_gem_request_get_engine(i915_gem_active_peek(active));

}



#define for_each_active(mask, idx) \

	for (; mask ? idx = ffs(mask) - 1, 1 : 0; mask &= ~BIT(idx))

drivers/gpu/drm/i915/i915_gem_tiling.c

+1 −1
Original line number Diff line number Diff line
@@ -242,7 +242,7 @@ i915_gem_set_tiling(struct drm_device *dev, void *data, 
			}



			obj->fence_dirty =

				obj->last_fence.request ||

				!i915_gem_active_is_idle(&obj->last_fence) ||

				obj->fence_reg != I915_FENCE_REG_NONE;



			obj->tiling_mode = args->tiling_mode;