linux-kernel - [PATCH v2 06/13] drm/msm/gem: Rename to pin/unpin

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Message-Id: <20220719171900.289265-7-robdclark@gmail.com>
Date:   Tue, 19 Jul 2022 10:18:50 -0700
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        Rob Clark <robdclark@...omium.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 06/13] drm/msm/gem: Rename to pin/unpin_pages

From: Rob Clark <robdclark@...omium.org>

Since that is what these fxns actually do.. they are getting *pinned*
pages (as opposed to cases where we need pages, but don't need them
pinned, like CPU mappings).

Signed-off-by: Rob Clark <robdclark@...omium.org>
---
 drivers/gpu/drm/msm/msm_gem.c       | 18 +++++++++++++-----
 drivers/gpu/drm/msm/msm_gem.h       |  4 ++--
 drivers/gpu/drm/msm/msm_gem_prime.c |  4 ++--
 3 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 97467364dc0a..3da64c7f65a2 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -177,30 +177,38 @@ static void put_pages(struct drm_gem_object *obj)
 	}
 }
 
-struct page **msm_gem_get_pages(struct drm_gem_object *obj)
+static struct page **msm_gem_pin_pages_locked(struct drm_gem_object *obj)
 {
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
 	struct page **p;
 
-	msm_gem_lock(obj);
+	GEM_WARN_ON(!msm_gem_is_locked(obj));
 
 	if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
-		msm_gem_unlock(obj);
 		return ERR_PTR(-EBUSY);
 	}
 
 	p = get_pages(obj);
-
 	if (!IS_ERR(p)) {
 		msm_obj->pin_count++;
 		update_lru(obj);
 	}
 
+	return p;
+}
+
+struct page **msm_gem_pin_pages(struct drm_gem_object *obj)
+{
+	struct page **p;
+
+	msm_gem_lock(obj);
+	p = msm_gem_pin_pages_locked(obj);
 	msm_gem_unlock(obj);
+
 	return p;
 }
 
-void msm_gem_put_pages(struct drm_gem_object *obj)
+void msm_gem_unpin_pages(struct drm_gem_object *obj)
 {
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
 
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index 0ab0dc4f8c25..6fe521ccda45 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -159,8 +159,8 @@ int msm_gem_get_and_pin_iova(struct drm_gem_object *obj,
 		struct msm_gem_address_space *aspace, uint64_t *iova);
 void msm_gem_unpin_iova(struct drm_gem_object *obj,
 		struct msm_gem_address_space *aspace);
-struct page **msm_gem_get_pages(struct drm_gem_object *obj);
-void msm_gem_put_pages(struct drm_gem_object *obj);
+struct page **msm_gem_pin_pages(struct drm_gem_object *obj);
+void msm_gem_unpin_pages(struct drm_gem_object *obj);
 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
 		struct drm_mode_create_dumb *args);
 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index dcc8a573bc76..c1d91863df05 100644
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -63,12 +63,12 @@ struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
 int msm_gem_prime_pin(struct drm_gem_object *obj)
 {
 	if (!obj->import_attach)
-		msm_gem_get_pages(obj);
+		msm_gem_pin_pages(obj);
 	return 0;
 }
 
 void msm_gem_prime_unpin(struct drm_gem_object *obj)
 {
 	if (!obj->import_attach)
-		msm_gem_put_pages(obj);
+		msm_gem_unpin_pages(obj);
 }
-- 
2.36.1