drm/i915: Pull unpin map into vma release

A reasonably common operation is to pin the map of the vma alongside the
vma itself for the lifetime of the vma, and so release both pins at the
same time as destroying the vma. It is common enough to pull into the
release function, making that central function more attractive to a
couple of other callsites.

The continual ulterior motive is to sweep over errors on module load
aborting...

Testcase: igt/drv_module_reload/basic-reload-inject
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180721125037.20127-1-chris@chris-wilson.co.uk

10 files changed, 24 insertions, 40 deletions

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 6bf10952c724..0376338d1f8d 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -1338,14 +1338,12 @@ free_oa_buffer(struct drm_i915_private *i915)
 {
 	mutex_lock(&i915->drm.struct_mutex);
 
-	i915_gem_object_unpin_map(i915->perf.oa.oa_buffer.vma->obj);
-	i915_vma_unpin(i915->perf.oa.oa_buffer.vma);
-	i915_gem_object_put(i915->perf.oa.oa_buffer.vma->obj);
-
-	i915->perf.oa.oa_buffer.vma = NULL;
-	i915->perf.oa.oa_buffer.vaddr = NULL;
+	i915_vma_unpin_and_release(&i915->perf.oa.oa_buffer.vma,
+				   I915_VMA_RELEASE_MAP);
 
 	mutex_unlock(&i915->drm.struct_mutex);
+
+	i915->perf.oa.oa_buffer.vaddr = NULL;
 }
 
 static void i915_oa_stream_destroy(struct i915_perf_stream *stream)
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 11d834f94220..274fd2a7bcb6 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -406,7 +406,7 @@ void i915_vma_unpin_iomap(struct i915_vma *vma)
 	i915_vma_unpin(vma);
 }
 
-void i915_vma_unpin_and_release(struct i915_vma **p_vma)
+void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags)
 {
 	struct i915_vma *vma;
 	struct drm_i915_gem_object *obj;
@@ -421,6 +421,9 @@ void i915_vma_unpin_and_release(struct i915_vma **p_vma)
 	i915_vma_unpin(vma);
 	i915_vma_close(vma);
 
+	if (flags & I915_VMA_RELEASE_MAP)
+		i915_gem_object_unpin_map(obj);
+
 	__i915_gem_object_release_unless_active(obj);
 }
 
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index f06d66377107..af5296b015f5 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -138,7 +138,8 @@ i915_vma_instance(struct drm_i915_gem_object *obj,
 		  struct i915_address_space *vm,
 		  const struct i915_ggtt_view *view);
 
-void i915_vma_unpin_and_release(struct i915_vma **p_vma);
+void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags);
+#define I915_VMA_RELEASE_MAP BIT(0)
 
 static inline bool i915_vma_is_active(struct i915_vma *vma)
 {
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 2d1952849d69..734a789688da 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -527,7 +527,7 @@ err_unref:
 
 void intel_engine_cleanup_scratch(struct intel_engine_cs *engine)
 {
-	i915_vma_unpin_and_release(&engine->scratch);
+	i915_vma_unpin_and_release(&engine->scratch, 0);
 }
 
 static void cleanup_phys_status_page(struct intel_engine_cs *engine)
@@ -543,20 +543,8 @@ static void cleanup_phys_status_page(struct intel_engine_cs *engine)
 
 static void cleanup_status_page(struct intel_engine_cs *engine)
 {
-	struct i915_vma *vma;
-	struct drm_i915_gem_object *obj;
-
-	vma = fetch_and_zero(&engine->status_page.vma);
-	if (!vma)
-		return;
-
-	obj = vma->obj;
-
-	i915_vma_unpin(vma);
-	i915_vma_close(vma);
-
-	i915_gem_object_unpin_map(obj);
-	__i915_gem_object_release_unless_active(obj);
+	i915_vma_unpin_and_release(&engine->status_page.vma,
+				   I915_VMA_RELEASE_MAP);
 }
 
 static int init_status_page(struct intel_engine_cs *engine)
diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 560c7406ae40..846d693ecb53 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -170,7 +170,7 @@ static int guc_shared_data_create(struct intel_guc *guc)
 
 	vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB);
 	if (IS_ERR(vaddr)) {
-		i915_vma_unpin_and_release(&vma);
+		i915_vma_unpin_and_release(&vma, 0);
 		return PTR_ERR(vaddr);
 	}
 
@@ -182,8 +182,7 @@ static int guc_shared_data_create(struct intel_guc *guc)
 
 static void guc_shared_data_destroy(struct intel_guc *guc)
 {
-	i915_gem_object_unpin_map(guc->shared_data->obj);
-	i915_vma_unpin_and_release(&guc->shared_data);
+	i915_vma_unpin_and_release(&guc->shared_data, I915_VMA_RELEASE_MAP);
 }
 
 int intel_guc_init(struct intel_guc *guc)
diff --git a/drivers/gpu/drm/i915/intel_guc_ads.c b/drivers/gpu/drm/i915/intel_guc_ads.c
index dcaa3fb71765..f0db62887f50 100644
--- a/drivers/gpu/drm/i915/intel_guc_ads.c
+++ b/drivers/gpu/drm/i915/intel_guc_ads.c
@@ -148,5 +148,5 @@ int intel_guc_ads_create(struct intel_guc *guc)
 
 void intel_guc_ads_destroy(struct intel_guc *guc)
 {
-	i915_vma_unpin_and_release(&guc->ads_vma);
+	i915_vma_unpin_and_release(&guc->ads_vma, 0);
 }
diff --git a/drivers/gpu/drm/i915/intel_guc_ct.c b/drivers/gpu/drm/i915/intel_guc_ct.c
index 371b6005954a..a52883e9146f 100644
--- a/drivers/gpu/drm/i915/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/intel_guc_ct.c
@@ -204,7 +204,7 @@ static int ctch_init(struct intel_guc *guc,
 	return 0;
 
 err_vma:
-	i915_vma_unpin_and_release(&ctch->vma);
+	i915_vma_unpin_and_release(&ctch->vma, 0);
 err_out:
 	CT_DEBUG_DRIVER("CT: channel %d initialization failed; err=%d\n",
 			ctch->owner, err);
@@ -214,10 +214,7 @@ err_out:
 static void ctch_fini(struct intel_guc *guc,
 		      struct intel_guc_ct_channel *ctch)
 {
-	GEM_BUG_ON(!ctch->vma);
-
-	i915_gem_object_unpin_map(ctch->vma->obj);
-	i915_vma_unpin_and_release(&ctch->vma);
+	i915_vma_unpin_and_release(&ctch->vma, I915_VMA_RELEASE_MAP);
 }
 
 static int ctch_open(struct intel_guc *guc,
diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
index 6da61a71d28f..d3ebdbc0182e 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -498,7 +498,7 @@ err:
 
 void intel_guc_log_destroy(struct intel_guc_log *log)
 {
-	i915_vma_unpin_and_release(&log->vma);
+	i915_vma_unpin_and_release(&log->vma, 0);
 }
 
 int intel_guc_log_set_level(struct intel_guc_log *log, u32 level)
diff --git a/drivers/gpu/drm/i915/intel_guc_submission.c b/drivers/gpu/drm/i915/intel_guc_submission.c
index 4aa5e6463e7b..195adbd0ebf7 100644
--- a/drivers/gpu/drm/i915/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/intel_guc_submission.c
@@ -317,7 +317,7 @@ static int guc_stage_desc_pool_create(struct intel_guc *guc)
 
 	vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB);
 	if (IS_ERR(vaddr)) {
-		i915_vma_unpin_and_release(&vma);
+		i915_vma_unpin_and_release(&vma, 0);
 		return PTR_ERR(vaddr);
 	}
 
@@ -331,8 +331,7 @@ static int guc_stage_desc_pool_create(struct intel_guc *guc)
 static void guc_stage_desc_pool_destroy(struct intel_guc *guc)
 {
 	ida_destroy(&guc->stage_ids);
-	i915_gem_object_unpin_map(guc->stage_desc_pool->obj);
-	i915_vma_unpin_and_release(&guc->stage_desc_pool);
+	i915_vma_unpin_and_release(&guc->stage_desc_pool, I915_VMA_RELEASE_MAP);
 }
 
 /*
@@ -1008,7 +1007,7 @@ guc_client_alloc(struct drm_i915_private *dev_priv,
 err_vaddr:
 	i915_gem_object_unpin_map(client->vma->obj);
 err_vma:
-	i915_vma_unpin_and_release(&client->vma);
+	i915_vma_unpin_and_release(&client->vma, 0);
 err_id:
 	ida_simple_remove(&guc->stage_ids, client->stage_id);
 err_client:
@@ -1020,8 +1019,7 @@ static void guc_client_free(struct intel_guc_client *client)
 {
 	unreserve_doorbell(client);
 	guc_stage_desc_fini(client->guc, client);
-	i915_gem_object_unpin_map(client->vma->obj);
-	i915_vma_unpin_and_release(&client->vma);
+	i915_vma_unpin_and_release(&client->vma, I915_VMA_RELEASE_MAP);
 	ida_simple_remove(&client->guc->stage_ids, client->stage_id);
 	kfree(client);
 }
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 174479232e94..c52ef2817c96 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1657,7 +1657,7 @@ err:
 
 static void lrc_destroy_wa_ctx(struct intel_engine_cs *engine)
 {
-	i915_vma_unpin_and_release(&engine->wa_ctx.vma);
+	i915_vma_unpin_and_release(&engine->wa_ctx.vma, 0);
 }
 
 typedef u32 *(*wa_bb_func_t)(struct intel_engine_cs *engine, u32 *batch);